diff options
Diffstat (limited to 'packages/linux/linux-rp-2.6.23/wm97xx-lg13-r0.patch')
| -rw-r--r-- | packages/linux/linux-rp-2.6.23/wm97xx-lg13-r0.patch | 5798 |
1 files changed, 5798 insertions, 0 deletions
diff --git a/packages/linux/linux-rp-2.6.23/wm97xx-lg13-r0.patch b/packages/linux/linux-rp-2.6.23/wm97xx-lg13-r0.patch new file mode 100644 index 0000000000..b029ccc066 --- /dev/null +++ b/packages/linux/linux-rp-2.6.23/wm97xx-lg13-r0.patch @@ -0,0 +1,5798 @@ +Index: linux-2.6.17/drivers/input/touchscreen/Kconfig +=================================================================== +--- linux-2.6.17.orig/drivers/input/touchscreen/Kconfig 2006-09-19 20:35:35.060495500 +0200 ++++ linux-2.6.17/drivers/input/touchscreen/Kconfig 2006-09-19 20:36:47.965051750 +0200 +@@ -121,4 +121,57 @@ config TOUCHSCREEN_TSC2101 + To compile this driver as a module, choose M here: the + module will be called ads7846_ts. + ++config TOUCHSCREEN_WM97XX ++ tristate "Support for WM97xx AC97 touchscreen controllers" ++ depends SND_AC97_BUS ++ ++choice ++ prompt "WM97xx codec type" ++ ++config TOUCHSCREEN_WM9705 ++ bool "WM9705 Touchscreen interface support" ++ depends on TOUCHSCREEN_WM97XX ++ help ++ Say Y here if you have the wm9705 touchscreen. ++ ++ If unsure, say N. ++ ++ To compile this driver as a module, choose M here: the ++ module will be called wm9705. ++ ++config TOUCHSCREEN_WM9712 ++ bool "WM9712 Touchscreen interface support" ++ depends on TOUCHSCREEN_WM97XX ++ help ++ Say Y here if you have the wm9712 touchscreen. ++ ++ If unsure, say N. ++ ++ To compile this driver as a module, choose M here: the ++ module will be called wm9712. ++ ++config TOUCHSCREEN_WM9713 ++ bool "WM9713 Touchscreen interface support" ++ depends on TOUCHSCREEN_WM97XX ++ help ++ Say Y here if you have the wm9713 touchscreen. ++ ++ If unsure, say N. ++ ++ To compile this driver as a module, choose M here: the ++ module will be called wm9713. ++ ++endchoice ++ ++config TOUCHSCREEN_WM97XX_PXA ++ tristate "WM97xx PXA accelerated touch" ++ depends on TOUCHSCREEN_WM97XX && ARCH_PXA ++ help ++ Say Y here for continuous mode touch on the PXA ++ ++ If unsure, say N ++ ++ To compile this driver as a module, choose M here: the ++ module will be called pxa-wm97xx ++ + endif +Index: linux-2.6.17/drivers/input/touchscreen/Makefile +=================================================================== +--- linux-2.6.17.orig/drivers/input/touchscreen/Makefile 2006-09-19 20:35:35.072496250 +0200 ++++ linux-2.6.17/drivers/input/touchscreen/Makefile 2006-09-19 20:37:40.540337500 +0200 +@@ -4,6 +4,8 @@ + + # Each configuration option enables a list of files. + ++wm97xx-ts-objs := wm97xx-core.o ++ + obj-$(CONFIG_TOUCHSCREEN_ADS7846) += ads7846.o + obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o + obj-$(CONFIG_TOUCHSCREEN_CORGI) += corgi_ts.o +@@ -13,3 +15,16 @@ obj-$(CONFIG_TOUCHSCREEN_MTOUCH) += mtou + obj-$(CONFIG_TOUCHSCREEN_MK712) += mk712.o + obj-$(CONFIG_TOUCHSCREEN_HP600) += hp680_ts_input.o + obj-$(CONFIG_TOUCHSCREEN_TSC2101) += tsc2101_ts.o ++obj-$(CONFIG_TOUCHSCREEN_WM97XX) += wm97xx-ts.o ++obj-$(CONFIG_TOUCHSCREEN_WM97XX_PXA) += pxa-wm97xx.o ++ ++ifeq ($(CONFIG_TOUCHSCREEN_WM9713),y) ++wm97xx-ts-objs += wm9713.o ++endif ++ ++ifeq ($(CONFIG_TOUCHSCREEN_WM9712),y) ++wm97xx-ts-objs += wm9712.o ++endif ++ifeq ($(CONFIG_TOUCHSCREEN_WM9705),y) ++wm97xx-ts-objs += wm9705.o ++endif +Index: linux-2.6.17/drivers/input/touchscreen/pxa-wm97xx.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.17/drivers/input/touchscreen/pxa-wm97xx.c 2006-09-19 20:36:47.965051750 +0200 +@@ -0,0 +1,289 @@ ++/* ++ * pxa-wm97xx.c -- pxa-wm97xx Continuous Touch screen driver for ++ * Wolfson WM97xx AC97 Codecs. ++ * ++ * Copyright 2004 Wolfson Microelectronics PLC. ++ * Author: Liam Girdwood ++ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com ++ * Parts Copyright : Ian Molton <spyro@f2s.com> ++ * Andrew Zabolotny <zap@homelink.ru> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * Notes: ++ * This is a wm97xx extended touch driver to capture touch ++ * data in a continuous manner on the Intel XScale archictecture ++ * ++ * Features: ++ * - codecs supported:- WM9705, WM9712, WM9713 ++ * - processors supported:- Intel XScale PXA25x, PXA26x, PXA27x ++ * ++ * Revision history ++ * 18th Aug 2004 Initial version. ++ * 26th Jul 2005 Improved continous read back and added FIFO flushing. ++ * 06th Sep 2005 Mike Arthur <linux@wolfsonmicro.com> ++ * Moved to using the wm97xx bus ++ * ++ */ ++ ++#include <linux/module.h> ++#include <linux/moduleparam.h> ++#include <linux/version.h> ++#include <linux/kernel.h> ++#include <linux/init.h> ++#include <linux/delay.h> ++#include <linux/irq.h> ++#include <linux/wm97xx.h> ++#include <asm/io.h> ++#include <asm/arch/pxa-regs.h> ++ ++#define VERSION "0.13" ++ ++struct continuous { ++ u16 id; /* codec id */ ++ u8 code; /* continuous code */ ++ u8 reads; /* number of coord reads per read cycle */ ++ u32 speed; /* number of coords per second */ ++}; ++ ++#define WM_READS(sp) ((sp / HZ) + 1) ++ ++static const struct continuous cinfo[] = { ++ {WM9705_ID2, 0, WM_READS(94), 94}, ++ {WM9705_ID2, 1, WM_READS(188), 188}, ++ {WM9705_ID2, 2, WM_READS(375), 375}, ++ {WM9705_ID2, 3, WM_READS(750), 750}, ++ {WM9712_ID2, 0, WM_READS(94), 94}, ++ {WM9712_ID2, 1, WM_READS(188), 188}, ++ {WM9712_ID2, 2, WM_READS(375), 375}, ++ {WM9712_ID2, 3, WM_READS(750), 750}, ++ {WM9713_ID2, 0, WM_READS(94), 94}, ++ {WM9713_ID2, 1, WM_READS(120), 120}, ++ {WM9713_ID2, 2, WM_READS(154), 154}, ++ {WM9713_ID2, 3, WM_READS(188), 188}, ++}; ++ ++/* continuous speed index */ ++static int sp_idx = 0; ++static u16 last = 0, tries = 0; ++ ++/* ++ * Pen sampling frequency (Hz) in continuous mode. ++ */ ++static int cont_rate = 200; ++module_param(cont_rate, int, 0); ++MODULE_PARM_DESC(cont_rate, "Sampling rate in continuous mode (Hz)"); ++ ++/* ++ * Pen down detection. ++ * ++ * This driver can either poll or use an interrupt to indicate a pen down ++ * event. If the irq request fails then it will fall back to polling mode. ++ */ ++static int pen_int = 1; ++module_param(pen_int, int, 0); ++MODULE_PARM_DESC(pen_int, "Pen down detection (1 = interrupt, 0 = polling)"); ++ ++/* ++ * Pressure readback. ++ * ++ * Set to 1 to read back pen down pressure ++ */ ++static int pressure = 0; ++module_param(pressure, int, 0); ++MODULE_PARM_DESC(pressure, "Pressure readback (1 = pressure, 0 = no pressure)"); ++ ++/* ++ * AC97 touch data slot. ++ * ++ * Touch screen readback data ac97 slot ++ */ ++static int ac97_touch_slot = 5; ++module_param(ac97_touch_slot, int, 0); ++MODULE_PARM_DESC(ac97_touch_slot, "Touch screen data slot AC97 number"); ++ ++ ++/* flush AC97 slot 5 FIFO on pxa machines */ ++#ifdef CONFIG_PXA27x ++void wm97xx_acc_pen_up (struct wm97xx* wm) ++{ ++ set_current_state(TASK_INTERRUPTIBLE); ++ schedule_timeout(1); ++ ++ while (MISR & (1 << 2)) ++ MODR; ++} ++#else ++void wm97xx_acc_pen_up (struct wm97xx* wm) ++{ ++ int count = 16; ++ set_current_state(TASK_INTERRUPTIBLE); ++ schedule_timeout(1); ++ ++ while (count < 16) { ++ MODR; ++ count--; ++ } ++} ++#endif ++ ++int wm97xx_acc_pen_down (struct wm97xx* wm) ++{ ++ u16 x, y, p = 0x100 | WM97XX_ADCSEL_PRES; ++ int reads = 0; ++ ++ /* data is never immediately available after pen down irq */ ++ set_current_state(TASK_INTERRUPTIBLE); ++ schedule_timeout(1); ++ ++ if (tries > 5){ ++ tries = 0; ++ return RC_PENUP; ++ } ++ ++ x = MODR; ++ if (x == last) { ++ tries++; ++ return RC_AGAIN; ++ } ++ last = x; ++ do { ++ if (reads) ++ x= MODR; ++ y= MODR; ++ if (pressure) ++ p = MODR; ++ ++ /* are samples valid */ ++ if ((x & 0x7000) != WM97XX_ADCSEL_X || ++ (y & 0x7000) != WM97XX_ADCSEL_Y || ++ (p & 0x7000) != WM97XX_ADCSEL_PRES) ++ goto up; ++ ++ /* coordinate is good */ ++ tries = 0; ++ //printk("x %x y %x p %x\n", x,y,p); ++ input_report_abs (wm->input_dev, ABS_X, x & 0xfff); ++ input_report_abs (wm->input_dev, ABS_Y, y & 0xfff); ++ input_report_abs (wm->input_dev, ABS_PRESSURE, p & 0xfff); ++ input_sync (wm->input_dev); ++ reads++; ++ } while (reads < cinfo[sp_idx].reads); ++up: ++ return RC_PENDOWN | RC_AGAIN; ++} ++ ++int wm97xx_acc_startup(struct wm97xx* wm) ++{ ++ int idx = 0; ++ ++ /* check we have a codec */ ++ if (wm->ac97 == NULL) ++ return -ENODEV; ++ ++ /* Go you big red fire engine */ ++ for (idx = 0; idx < ARRAY_SIZE(cinfo); idx++) { ++ if (wm->id != cinfo[idx].id) ++ continue; ++ sp_idx = idx; ++ if (cont_rate <= cinfo[idx].speed) ++ break; ++ } ++ wm->acc_rate = cinfo[sp_idx].code; ++ wm->acc_slot = ac97_touch_slot; ++ printk(KERN_INFO "pxa2xx accelerated touchscreen driver, %d samples (sec)\n", ++ cinfo[sp_idx].speed); ++ ++ /* codec specific irq config */ ++ if (pen_int) { ++ switch (wm->id) { ++ case WM9705_ID2: ++ wm->pen_irq = IRQ_GPIO(4); ++ set_irq_type(IRQ_GPIO(4), IRQT_BOTHEDGE); ++ break; ++ case WM9712_ID2: ++ case WM9713_ID2: ++ /* enable pen down interrupt */ ++ /* use PEN_DOWN GPIO 13 to assert IRQ on GPIO line 2 */ ++ wm->pen_irq = MAINSTONE_AC97_IRQ; ++ wm97xx_config_gpio(wm, WM97XX_GPIO_13, WM97XX_GPIO_IN, ++ WM97XX_GPIO_POL_HIGH, WM97XX_GPIO_STICKY, WM97XX_GPIO_WAKE); ++ wm97xx_config_gpio(wm, WM97XX_GPIO_2, WM97XX_GPIO_OUT, ++ WM97XX_GPIO_POL_HIGH, WM97XX_GPIO_NOTSTICKY, WM97XX_GPIO_NOWAKE); ++ break; ++ default: ++ printk(KERN_WARNING "pen down irq not supported on this device\n"); ++ pen_int = 0; ++ break; ++ } ++ } ++ ++ return 0; ++} ++ ++void wm97xx_acc_shutdown(struct wm97xx* wm) ++{ ++ /* codec specific deconfig */ ++ if (pen_int) { ++ switch (wm->id & 0xffff) { ++ case WM9705_ID2: ++ wm->pen_irq = 0; ++ break; ++ case WM9712_ID2: ++ case WM9713_ID2: ++ /* disable interrupt */ ++ wm->pen_irq = 0; ++ break; ++ } ++ } ++} ++ ++static struct wm97xx_mach_ops pxa_mach_ops = { ++ .acc_enabled = 1, ++ .acc_pen_up = wm97xx_acc_pen_up, ++ .acc_pen_down = wm97xx_acc_pen_down, ++ .acc_startup = wm97xx_acc_startup, ++ .acc_shutdown = wm97xx_acc_shutdown, ++}; ++ ++int pxa_wm97xx_probe(struct device *dev) ++{ ++ struct wm97xx *wm = dev->driver_data; ++ return wm97xx_register_mach_ops (wm, &pxa_mach_ops); ++} ++ ++int pxa_wm97xx_remove(struct device *dev) ++{ ++ struct wm97xx *wm = dev->driver_data; ++ wm97xx_unregister_mach_ops (wm); ++ return 0; ++} ++ ++static struct device_driver pxa_wm97xx_driver = { ++ .name = "wm97xx-touchscreen", ++ .bus = &wm97xx_bus_type, ++ .owner = THIS_MODULE, ++ .probe = pxa_wm97xx_probe, ++ .remove = pxa_wm97xx_remove ++}; ++ ++static int __init pxa_wm97xx_init(void) ++{ ++ return driver_register(&pxa_wm97xx_driver); ++} ++ ++static void __exit pxa_wm97xx_exit(void) ++{ ++ driver_unregister(&pxa_wm97xx_driver); ++} ++ ++module_init(pxa_wm97xx_init); ++module_exit(pxa_wm97xx_exit); ++ ++/* Module information */ ++MODULE_AUTHOR("Liam Girdwood <liam.girdwood@wolfsonmicro.com>"); ++MODULE_DESCRIPTION("wm97xx continuous touch driver for pxa2xx"); ++MODULE_LICENSE("GPL"); +Index: linux-2.6.17/drivers/input/touchscreen/wm9705.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.17/drivers/input/touchscreen/wm9705.c 2006-09-19 20:36:47.969052000 +0200 +@@ -0,0 +1,360 @@ ++/* ++ * wm9705.c -- Codec driver for Wolfson WM9705 AC97 Codec. ++ * ++ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC. ++ * Author: Liam Girdwood ++ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com ++ * Parts Copyright : Ian Molton <spyro@f2s.com> ++ * Andrew Zabolotny <zap@homelink.ru> ++ * Russell King <rmk@arm.linux.org.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * Revision history ++ * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com> ++ * Added pre and post sample calls. ++ * ++ */ ++ ++#include <linux/module.h> ++#include <linux/moduleparam.h> ++#include <linux/version.h> ++#include <linux/kernel.h> ++#include <linux/input.h> ++#include <linux/delay.h> ++#include <linux/bitops.h> ++#include <linux/wm97xx.h> ++ ++#define TS_NAME "wm97xx" ++#define WM9705_VERSION "0.62" ++#define DEFAULT_PRESSURE 0xb0c0 ++ ++/* ++ * Debug ++ */ ++#if 0 ++#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg) ++#else ++#define dbg(format, arg...) ++#endif ++#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg) ++#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg) ++#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg) ++ ++/* ++ * Module parameters ++ */ ++ ++/* ++ * Set current used for pressure measurement. ++ * ++ * Set pil = 2 to use 400uA ++ * pil = 1 to use 200uA and ++ * pil = 0 to disable pressure measurement. ++ * ++ * This is used to increase the range of values returned by the adc ++ * when measureing touchpanel pressure. ++ */ ++static int pil = 0; ++module_param(pil, int, 0); ++MODULE_PARM_DESC(pil, "Set current used for pressure measurement."); ++ ++/* ++ * Set threshold for pressure measurement. ++ * ++ * Pen down pressure below threshold is ignored. ++ */ ++static int pressure = DEFAULT_PRESSURE & 0xfff; ++module_param(pressure, int, 0); ++MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement."); ++ ++/* ++ * Set adc sample delay. ++ * ++ * For accurate touchpanel measurements, some settling time may be ++ * required between the switch matrix applying a voltage across the ++ * touchpanel plate and the ADC sampling the signal. ++ * ++ * This delay can be set by setting delay = n, where n is the array ++ * position of the delay in the array delay_table below. ++ * Long delays > 1ms are supported for completeness, but are not ++ * recommended. ++ */ ++static int delay = 4; ++module_param(delay, int, 0); ++MODULE_PARM_DESC(delay, "Set adc sample delay."); ++ ++/* ++ * Pen detect comparator threshold. ++ * ++ * 0 to Vmid in 15 steps, 0 = use zero power comparator with Vmid threshold ++ * i.e. 1 = Vmid/15 threshold ++ * 15 = Vmid/1 threshold ++ * ++ * Adjust this value if you are having problems with pen detect not ++ * detecting any down events. ++ */ ++static int pdd = 8; ++module_param(pdd, int, 0); ++MODULE_PARM_DESC(pdd, "Set pen detect comparator threshold"); ++ ++/* ++ * Set adc mask function. ++ * ++ * Sources of glitch noise, such as signals driving an LCD display, may feed ++ * through to the touch screen plates and affect measurement accuracy. In ++ * order to minimise this, a signal may be applied to the MASK pin to delay or ++ * synchronise the sampling. ++ * ++ * 0 = No delay or sync ++ * 1 = High on pin stops conversions ++ * 2 = Edge triggered, edge on pin delays conversion by delay param (above) ++ * 3 = Edge triggered, edge on pin starts conversion after delay param ++ */ ++static int mask = 0; ++module_param(mask, int, 0); ++MODULE_PARM_DESC(mask, "Set adc mask function."); ++ ++/* ++ * ADC sample delay times in uS ++ */ ++static const int delay_table[] = { ++ 21, // 1 AC97 Link frames ++ 42, // 2 ++ 84, // 4 ++ 167, // 8 ++ 333, // 16 ++ 667, // 32 ++ 1000, // 48 ++ 1333, // 64 ++ 2000, // 96 ++ 2667, // 128 ++ 3333, // 160 ++ 4000, // 192 ++ 4667, // 224 ++ 5333, // 256 ++ 6000, // 288 ++ 0 // No delay, switch matrix always on ++}; ++ ++/* ++ * Delay after issuing a POLL command. ++ * ++ * The delay is 3 AC97 link frames + the touchpanel settling delay ++ */ ++static inline void poll_delay(int d) ++{ ++ udelay (3 * AC97_LINK_FRAME + delay_table [d]); ++} ++ ++/* ++ * set up the physical settings of the WM9705 ++ */ ++static void init_wm9705_phy(struct wm97xx* wm) ++{ ++ u16 dig1 = 0, dig2 = WM97XX_RPR; ++ ++ /* ++ * mute VIDEO and AUX as they share X and Y touchscreen ++ * inputs on the WM9705 ++ */ ++ wm97xx_reg_write(wm, AC97_AUX, 0x8000); ++ wm97xx_reg_write(wm, AC97_VIDEO, 0x8000); ++ ++ /* touchpanel pressure current*/ ++ if (pil == 2) { ++ dig2 |= WM9705_PIL; ++ dbg("setting pressure measurement current to 400uA."); ++ } else if (pil) ++ dbg("setting pressure measurement current to 200uA."); ++ if(!pil) ++ pressure = 0; ++ ++ /* polling mode sample settling delay */ ++ if (delay!=4) { ++ if (delay < 0 || delay > 15) { ++ dbg("supplied delay out of range."); ++ delay = 4; ++ } ++ } ++ dig1 &= 0xff0f; ++ dig1 |= WM97XX_DELAY(delay); ++ dbg("setting adc sample delay to %d u Secs.", delay_table[delay]); ++ ++ /* WM9705 pdd */ ++ dig2 |= (pdd & 0x000f); ++ dbg("setting pdd to Vmid/%d", 1 - (pdd & 0x000f)); ++ ++ /* mask */ ++ dig2 |= ((mask & 0x3) << 4); ++ ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); ++} ++ ++static int wm9705_digitiser_ioctl(struct wm97xx* wm, int cmd) ++{ ++ switch(cmd) { ++ case WM97XX_DIG_START: ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig[2] | WM97XX_PRP_DET_DIG); ++ wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */ ++ break; ++ case WM97XX_DIG_STOP: ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig[2] & ~WM97XX_PRP_DET_DIG); ++ break; ++ case WM97XX_AUX_PREPARE: ++ memcpy(wm->dig_save, wm->dig, sizeof(wm->dig)); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, 0); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, WM97XX_PRP_DET_DIG); ++ break; ++ case WM97XX_DIG_RESTORE: ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, wm->dig_save[1]); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig_save[2]); ++ break; ++ case WM97XX_PHY_INIT: ++ init_wm9705_phy(wm); ++ break; ++ default: ++ return -EINVAL; ++ } ++ return 0; ++} ++ ++static inline int is_pden (struct wm97xx* wm) ++{ ++ return wm->dig[2] & WM9705_PDEN; ++} ++ ++/* ++ * Read a sample from the WM9705 adc in polling mode. ++ */ ++static int wm9705_poll_sample (struct wm97xx* wm, int adcsel, int *sample) ++{ ++ int timeout = 5 * delay; ++ ++ if (!wm->pen_probably_down) { ++ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (!(data & WM97XX_PEN_DOWN)) ++ return RC_PENUP; ++ wm->pen_probably_down = 1; ++ } ++ ++ /* set up digitiser */ ++ if (adcsel & 0x8000) ++ adcsel = ((adcsel & 0x7fff) + 3) << 12; ++ ++ if (wm->mach_ops && wm->mach_ops->pre_sample) ++ wm->mach_ops->pre_sample(adcsel); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, adcsel | WM97XX_POLL | WM97XX_DELAY(delay)); ++ ++ /* wait 3 AC97 time slots + delay for conversion */ ++ poll_delay (delay); ++ ++ /* wait for POLL to go low */ ++ while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) && timeout) { ++ udelay(AC97_LINK_FRAME); ++ timeout--; ++ } ++ ++ if (timeout <= 0) { ++ /* If PDEN is set, we can get a timeout when pen goes up */ ++ if (is_pden(wm)) ++ wm->pen_probably_down = 0; ++ else ++ dbg ("adc sample timeout"); ++ return RC_PENUP; ++ } ++ ++ *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (wm->mach_ops && wm->mach_ops->post_sample) ++ wm->mach_ops->post_sample(adcsel); ++ ++ /* check we have correct sample */ ++ if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) { ++ dbg ("adc wrong sample, read %x got %x", adcsel, ++ *sample & WM97XX_ADCSEL_MASK); ++ return RC_PENUP; ++ } ++ ++ if (!(*sample & WM97XX_PEN_DOWN)) { ++ wm->pen_probably_down = 0; ++ return RC_PENUP; ++ } ++ ++ return RC_VALID; ++} ++ ++/* ++ * Sample the WM9705 touchscreen in polling mode ++ */ ++static int wm9705_poll_touch(struct wm97xx* wm, struct wm97xx_data *data) ++{ ++ int rc; ++ ++ if ((rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_X, &data->x)) != RC_VALID) ++ return rc; ++ if ((rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_Y, &data->y)) != RC_VALID) ++ return rc; ++ if (pil) { ++ if ((rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_PRES, &data->p)) != RC_VALID) ++ return rc; ++ } else ++ data->p = DEFAULT_PRESSURE; ++ ++ return RC_VALID; ++} ++ ++/* ++ * Enable WM9705 continuous mode, i.e. touch data is streamed across an AC97 slot ++ */ ++static int wm9705_acc_enable (struct wm97xx* wm, int enable) ++{ ++ u16 dig1, dig2; ++ int ret = 0; ++ ++ dig1 = wm->dig[1]; ++ dig2 = wm->dig[2]; ++ ++ if (enable) { ++ /* continous mode */ ++ if (wm->mach_ops->acc_startup && (ret = wm->mach_ops->acc_startup(wm)) < 0) ++ return ret; ++ dig1 &= ~(WM97XX_CM_RATE_MASK | WM97XX_ADCSEL_MASK | ++ WM97XX_DELAY_MASK | WM97XX_SLT_MASK); ++ dig1 |= WM97XX_CTC | WM97XX_COO | WM97XX_SLEN | ++ WM97XX_DELAY (delay) | ++ WM97XX_SLT (wm->acc_slot) | ++ WM97XX_RATE (wm->acc_rate); ++ if (pil) ++ dig1 |= WM97XX_ADCSEL_PRES; ++ dig2 |= WM9705_PDEN; ++ } else { ++ dig1 &= ~(WM97XX_CTC | WM97XX_COO | WM97XX_SLEN); ++ dig2 &= ~WM9705_PDEN; ++ if (wm->mach_ops->acc_shutdown) ++ wm->mach_ops->acc_shutdown(wm); ++ } ++ ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); ++ return ret; ++} ++ ++struct wm97xx_codec_drv wm97xx_codec = { ++ .id = WM9705_ID2, ++ .name = "wm9705", ++ .poll_sample = wm9705_poll_sample, ++ .poll_touch = wm9705_poll_touch, ++ .acc_enable = wm9705_acc_enable, ++ .digitiser_ioctl = wm9705_digitiser_ioctl, ++}; ++ ++EXPORT_SYMBOL_GPL(wm97xx_codec); ++ ++/* Module information */ ++MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); ++MODULE_DESCRIPTION("WM9705 Touch Screen Driver"); ++MODULE_LICENSE("GPL"); +Index: linux-2.6.17/drivers/input/touchscreen/wm9712.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.17/drivers/input/touchscreen/wm9712.c 2006-09-19 20:36:47.969052000 +0200 +@@ -0,0 +1,464 @@ ++/* ++ * wm9712.c -- Codec driver for Wolfson WM9712 AC97 Codecs. ++ * ++ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC. ++ * Author: Liam Girdwood ++ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com ++ * Parts Copyright : Ian Molton <spyro@f2s.com> ++ * Andrew Zabolotny <zap@homelink.ru> ++ * Russell King <rmk@arm.linux.org.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * Revision history ++ * 4th Jul 2005 Initial version. ++ * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com> ++ * Added pre and post sample calls. ++ * ++ */ ++ ++#include <linux/module.h> ++#include <linux/moduleparam.h> ++#include <linux/version.h> ++#include <linux/kernel.h> ++#include <linux/input.h> ++#include <linux/delay.h> ++#include <linux/bitops.h> ++#include <linux/wm97xx.h> ++ ++#define TS_NAME "wm97xx" ++#define WM9712_VERSION "0.61" ++#define DEFAULT_PRESSURE 0xb0c0 ++ ++/* ++ * Debug ++ */ ++#if 0 ++#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg) ++#else ++#define dbg(format, arg...) ++#endif ++#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg) ++#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg) ++#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg) ++ ++/* ++ * Module parameters ++ */ ++ ++/* ++ * Set internal pull up for pen detect. ++ * ++ * Pull up is in the range 1.02k (least sensitive) to 64k (most sensitive) ++ * i.e. pull up resistance = 64k Ohms / rpu. ++ * ++ * Adjust this value if you are having problems with pen detect not ++ * detecting any down event. ++ */ ++static int rpu = 3; ++module_param(rpu, int, 0); ++MODULE_PARM_DESC(rpu, "Set internal pull up resitor for pen detect."); ++ ++/* ++ * Set current used for pressure measurement. ++ * ++ * Set pil = 2 to use 400uA ++ * pil = 1 to use 200uA and ++ * pil = 0 to disable pressure measurement. ++ * ++ * This is used to increase the range of values returned by the adc ++ * when measureing touchpanel pressure. ++ */ ++static int pil = 0; ++module_param(pil, int, 0); ++MODULE_PARM_DESC(pil, "Set current used for pressure measurement."); ++ ++/* ++ * Set threshold for pressure measurement. ++ * ++ * Pen down pressure below threshold is ignored. ++ */ ++static int pressure = DEFAULT_PRESSURE & 0xfff; ++module_param(pressure, int, 0); ++MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement."); ++ ++/* ++ * Set adc sample delay. ++ * ++ * For accurate touchpanel measurements, some settling time may be ++ * required between the switch matrix applying a voltage across the ++ * touchpanel plate and the ADC sampling the signal. ++ * ++ * This delay can be set by setting delay = n, where n is the array ++ * position of the delay in the array delay_table below. ++ * Long delays > 1ms are supported for completeness, but are not ++ * recommended. ++ */ ++static int delay = 3; ++module_param(delay, int, 0); ++MODULE_PARM_DESC(delay, "Set adc sample delay."); ++ ++/* ++ * Set five_wire = 1 to use a 5 wire touchscreen. ++ * ++ * NOTE: Five wire mode does not allow for readback of pressure. ++ */ ++static int five_wire; ++module_param(five_wire, int, 0); ++MODULE_PARM_DESC(five_wire, "Set to '1' to use 5-wire touchscreen."); ++ ++/* ++ * Set adc mask function. ++ * ++ * Sources of glitch noise, such as signals driving an LCD display, may feed ++ * through to the touch screen plates and affect measurement accuracy. In ++ * order to minimise this, a signal may be applied to the MASK pin to delay or ++ * synchronise the sampling. ++ * ++ * 0 = No delay or sync ++ * 1 = High on pin stops conversions ++ * 2 = Edge triggered, edge on pin delays conversion by delay param (above) ++ * 3 = Edge triggered, edge on pin starts conversion after delay param ++ */ ++static int mask = 0; ++module_param(mask, int, 0); ++MODULE_PARM_DESC(mask, "Set adc mask function."); ++ ++/* ++ * Coordinate Polling Enable. ++ * ++ * Set to 1 to enable coordinate polling. e.g. x,y[,p] is sampled together ++ * for every poll. ++ */ ++static int coord = 0; ++module_param(coord, int, 0); ++MODULE_PARM_DESC(coord, "Polling coordinate mode"); ++ ++/* ++ * ADC sample delay times in uS ++ */ ++static const int delay_table[] = { ++ 21, // 1 AC97 Link frames ++ 42, // 2 ++ 84, // 4 ++ 167, // 8 ++ 333, // 16 ++ 667, // 32 ++ 1000, // 48 ++ 1333, // 64 ++ 2000, // 96 ++ 2667, // 128 ++ 3333, // 160 ++ 4000, // 192 ++ 4667, // 224 ++ 5333, // 256 ++ 6000, // 288 ++ 0 // No delay, switch matrix always on ++}; ++ ++/* ++ * Delay after issuing a POLL command. ++ * ++ * The delay is 3 AC97 link frames + the touchpanel settling delay ++ */ ++static inline void poll_delay(int d) ++{ ++ udelay (3 * AC97_LINK_FRAME + delay_table [d]); ++} ++ ++/* ++ * set up the physical settings of the WM9712 ++ */ ++static void init_wm9712_phy(struct wm97xx* wm) ++{ ++ u16 dig1 = 0; ++ u16 dig2 = WM97XX_RPR | WM9712_RPU(1); ++ ++ /* WM9712 rpu */ ++ if (rpu) { ++ dig2 &= 0xffc0; ++ dig2 |= WM9712_RPU(rpu); ++ dbg("setting pen detect pull-up to %d Ohms",64000 / rpu); ++ } ++ ++ /* touchpanel pressure current*/ ++ if (pil == 2) { ++ dig2 |= WM9712_PIL; ++ dbg("setting pressure measurement current to 400uA."); ++ } else if (pil) ++ dbg("setting pressure measurement current to 200uA."); ++ if(!pil) ++ pressure = 0; ++ ++ /* WM9712 five wire */ ++ if (five_wire) { ++ dig2 |= WM9712_45W; ++ dbg("setting 5-wire touchscreen mode."); ++ } ++ ++ /* polling mode sample settling delay */ ++ if (delay < 0 || delay > 15) { ++ dbg("supplied delay out of range."); ++ delay = 4; ++ } ++ dig1 &= 0xff0f; ++ dig1 |= WM97XX_DELAY(delay); ++ dbg("setting adc sample delay to %d u Secs.", delay_table[delay]); ++ ++ /* mask */ ++ dig2 |= ((mask & 0x3) << 6); ++ if (mask) { ++ u16 reg; ++ /* Set GPIO4 as Mask Pin*/ ++ reg = wm97xx_reg_read(wm, AC97_MISC_AFE); ++ wm97xx_reg_write(wm, AC97_MISC_AFE, reg | WM97XX_GPIO_4); ++ reg = wm97xx_reg_read(wm, AC97_GPIO_CFG); ++ wm97xx_reg_write(wm, AC97_GPIO_CFG, reg | WM97XX_GPIO_4); ++ } ++ ++ /* wait - coord mode */ ++ if(coord) ++ dig2 |= WM9712_WAIT; ++ ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); ++} ++ ++static int wm9712_digitiser_ioctl(struct wm97xx* wm, int cmd) ++{ ++ u16 dig2 = wm->dig[2]; ++ ++ switch(cmd) { ++ case WM97XX_DIG_START: ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2 | WM97XX_PRP_DET_DIG); ++ wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */ ++ break; ++ case WM97XX_DIG_STOP: ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2 & ~WM97XX_PRP_DET_DIG); ++ break; ++ case WM97XX_AUX_PREPARE: ++ memcpy(wm->dig_save, wm->dig, sizeof(wm->dig)); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, 0); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, WM97XX_PRP_DET_DIG); ++ break; ++ case WM97XX_DIG_RESTORE: ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, wm->dig_save[1]); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig_save[2]); ++ break; ++ case WM97XX_PHY_INIT: ++ init_wm9712_phy(wm); ++ break; ++ default: ++ return -EINVAL; ++ } ++ return 0; ++} ++ ++static inline int is_pden (struct wm97xx* wm) ++{ ++ return wm->dig[2] & WM9712_PDEN; ++} ++ ++/* ++ * Read a sample from the WM9712 adc in polling mode. ++ */ ++static int wm9712_poll_sample (struct wm97xx* wm, int adcsel, int *sample) ++{ ++ int timeout = 5 * delay; ++ ++ if (!wm->pen_probably_down) { ++ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (!(data & WM97XX_PEN_DOWN)) ++ return RC_PENUP; ++ wm->pen_probably_down = 1; ++ } ++ ++ /* set up digitiser */ ++ if (adcsel & 0x8000) ++ adcsel = ((adcsel & 0x7fff) + 3) << 12; ++ ++ if (wm->mach_ops && wm->mach_ops->pre_sample) ++ wm->mach_ops->pre_sample(adcsel); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, adcsel | WM97XX_POLL | WM97XX_DELAY(delay)); ++ ++ /* wait 3 AC97 time slots + delay for conversion */ ++ poll_delay (delay); ++ ++ /* wait for POLL to go low */ ++ while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) && timeout) { ++ udelay(AC97_LINK_FRAME); ++ timeout--; ++ } ++ ++ if (timeout <= 0) { ++ /* If PDEN is set, we can get a timeout when pen goes up */ ++ if (is_pden(wm)) ++ wm->pen_probably_down = 0; ++ else ++ dbg ("adc sample timeout"); ++ return RC_PENUP; ++ } ++ ++ *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (wm->mach_ops && wm->mach_ops->post_sample) ++ wm->mach_ops->post_sample(adcsel); ++ ++ /* check we have correct sample */ ++ if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) { ++ dbg ("adc wrong sample, read %x got %x", adcsel, ++ *sample & WM97XX_ADCSEL_MASK); ++ return RC_PENUP; ++ } ++ ++ if (!(*sample & WM97XX_PEN_DOWN)) { ++ wm->pen_probably_down = 0; ++ return RC_PENUP; ++ } ++ ++ return RC_VALID; ++} ++ ++/* ++ * Read a coord from the WM9712 adc in polling mode. ++ */ ++static int wm9712_poll_coord (struct wm97xx* wm, struct wm97xx_data *data) ++{ ++ int timeout = 5 * delay; ++ ++ if (!wm->pen_probably_down) { ++ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (!(data & WM97XX_PEN_DOWN)) ++ return RC_PENUP; ++ wm->pen_probably_down = 1; ++ } ++ ++ /* set up digitiser */ ++ if (wm->mach_ops && wm->mach_ops->pre_sample) ++ wm->mach_ops->pre_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); ++ ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, ++ WM97XX_COO | WM97XX_POLL | WM97XX_DELAY(delay)); ++ ++ /* wait 3 AC97 time slots + delay for conversion and read x */ ++ poll_delay(delay); ++ data->x = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ /* wait for POLL to go low */ ++ while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) && timeout) { ++ udelay(AC97_LINK_FRAME); ++ timeout--; ++ } ++ ++ if (timeout <= 0) { ++ /* If PDEN is set, we can get a timeout when pen goes up */ ++ if (is_pden(wm)) ++ wm->pen_probably_down = 0; ++ else ++ dbg ("adc sample timeout"); ++ return RC_PENUP; ++ } ++ ++ /* read back y data */ ++ data->y = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (pil) ++ data->p = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ else ++ data->p = DEFAULT_PRESSURE; ++ ++ if (wm->mach_ops && wm->mach_ops->post_sample) ++ wm->mach_ops->post_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); ++ ++ /* check we have correct sample */ ++ if (!(data->x & WM97XX_ADCSEL_X) || !(data->y & WM97XX_ADCSEL_Y)) ++ goto err; ++ if(pil && !(data->p & WM97XX_ADCSEL_PRES)) ++ goto err; ++ ++ if (!(data->x & WM97XX_PEN_DOWN)) { ++ wm->pen_probably_down = 0; ++ return RC_PENUP; ++ } ++ return RC_VALID; ++err: ++ return RC_PENUP; ++} ++ ++/* ++ * Sample the WM9712 touchscreen in polling mode ++ */ ++static int wm9712_poll_touch(struct wm97xx* wm, struct wm97xx_data *data) ++{ ++ int rc; ++ ++ if(coord) { ++ if((rc = wm9712_poll_coord(wm, data)) != RC_VALID) ++ return rc; ++ } else { ++ if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_X, &data->x)) != RC_VALID) ++ return rc; ++ ++ if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_Y, &data->y)) != RC_VALID) ++ return rc; ++ ++ if (pil && !five_wire) { ++ if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_PRES, &data->p)) != RC_VALID) ++ return rc; ++ } else ++ data->p = DEFAULT_PRESSURE; ++ } ++ return RC_VALID; ++} ++ ++/* ++ * Enable WM9712 continuous mode, i.e. touch data is streamed across an AC97 slot ++ */ ++static int wm9712_acc_enable (struct wm97xx* wm, int enable) ++{ ++ u16 dig1, dig2; ++ int ret = 0; ++ ++ dig1 = wm->dig[1]; ++ dig2 = wm->dig[2]; ++ ++ if (enable) { ++ /* continous mode */ ++ if (wm->mach_ops->acc_startup && (ret = wm->mach_ops->acc_startup(wm)) < 0) ++ return ret; ++ dig1 &= ~(WM97XX_CM_RATE_MASK | WM97XX_ADCSEL_MASK | ++ WM97XX_DELAY_MASK | WM97XX_SLT_MASK); ++ dig1 |= WM97XX_CTC | WM97XX_COO | WM97XX_SLEN | ++ WM97XX_DELAY (delay) | ++ WM97XX_SLT (wm->acc_slot) | ++ WM97XX_RATE (wm->acc_rate); ++ if (pil) ++ dig1 |= WM97XX_ADCSEL_PRES; ++ dig2 |= WM9712_PDEN; ++ } else { ++ dig1 &= ~(WM97XX_CTC | WM97XX_COO | WM97XX_SLEN); ++ dig2 &= ~WM9712_PDEN; ++ if (wm->mach_ops->acc_shutdown) ++ wm->mach_ops->acc_shutdown(wm); ++ } ++ ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); ++ return 0; ++} ++ ++struct wm97xx_codec_drv wm97xx_codec = { ++ .id = WM9712_ID2, ++ .name = "wm9712", ++ .poll_sample = wm9712_poll_sample, ++ .poll_touch = wm9712_poll_touch, ++ .acc_enable = wm9712_acc_enable, ++ .digitiser_ioctl = wm9712_digitiser_ioctl, ++}; ++ ++EXPORT_SYMBOL_GPL(wm97xx_codec); ++ ++/* Module information */ ++MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); ++MODULE_DESCRIPTION("WM9712 Touch Screen Driver"); ++MODULE_LICENSE("GPL"); +Index: linux-2.6.17/drivers/input/touchscreen/wm9713.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.17/drivers/input/touchscreen/wm9713.c 2006-09-19 20:36:47.969052000 +0200 +@@ -0,0 +1,461 @@ ++/* ++ * wm9713.c -- Codec touch driver for Wolfson WM9713 AC97 Codec. ++ * ++ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC. ++ * Author: Liam Girdwood ++ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com ++ * Parts Copyright : Ian Molton <spyro@f2s.com> ++ * Andrew Zabolotny <zap@homelink.ru> ++ * Russell King <rmk@arm.linux.org.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * Revision history ++ * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com> ++ * Added pre and post sample calls. ++ * ++ */ ++ ++#include <linux/module.h> ++#include <linux/moduleparam.h> ++#include <linux/version.h> ++#include <linux/kernel.h> ++#include <linux/input.h> ++#include <linux/delay.h> ++#include <linux/bitops.h> ++#include <linux/wm97xx.h> ++ ++#define TS_NAME "wm97xx" ++#define WM9713_VERSION "0.53" ++#define DEFAULT_PRESSURE 0xb0c0 ++ ++/* ++ * Debug ++ */ ++#if 0 ++#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg) ++#else ++#define dbg(format, arg...) ++#endif ++#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg) ++#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg) ++#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg) ++ ++/* ++ * Module parameters ++ */ ++ ++/* ++ * Set internal pull up for pen detect. ++ * ++ * Pull up is in the range 1.02k (least sensitive) to 64k (most sensitive) ++ * i.e. pull up resistance = 64k Ohms / rpu. ++ * ++ * Adjust this value if you are having problems with pen detect not ++ * detecting any down event. ++ */ ++static int rpu = 1; ++module_param(rpu, int, 0); ++MODULE_PARM_DESC(rpu, "Set internal pull up resitor for pen detect."); ++ ++/* ++ * Set current used for pressure measurement. ++ * ++ * Set pil = 2 to use 400uA ++ * pil = 1 to use 200uA and ++ * pil = 0 to disable pressure measurement. ++ * ++ * This is used to increase the range of values returned by the adc ++ * when measureing touchpanel pressure. ++ */ ++static int pil = 0; ++module_param(pil, int, 0); ++MODULE_PARM_DESC(pil, "Set current used for pressure measurement."); ++ ++/* ++ * Set threshold for pressure measurement. ++ * ++ * Pen down pressure below threshold is ignored. ++ */ ++static int pressure = DEFAULT_PRESSURE & 0xfff; ++module_param(pressure, int, 0); ++MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement."); ++ ++/* ++ * Set adc sample delay. ++ * ++ * For accurate touchpanel measurements, some settling time may be ++ * required between the switch matrix applying a voltage across the ++ * touchpanel plate and the ADC sampling the signal. ++ * ++ * This delay can be set by setting delay = n, where n is the array ++ * position of the delay in the array delay_table below. ++ * Long delays > 1ms are supported for completeness, but are not ++ * recommended. ++ */ ++static int delay = 4; ++module_param(delay, int, 0); ++MODULE_PARM_DESC(delay, "Set adc sample delay."); ++ ++/* ++ * Set adc mask function. ++ * ++ * Sources of glitch noise, such as signals driving an LCD display, may feed ++ * through to the touch screen plates and affect measurement accuracy. In ++ * order to minimise this, a signal may be applied to the MASK pin to delay or ++ * synchronise the sampling. ++ * ++ * 0 = No delay or sync ++ * 1 = High on pin stops conversions ++ * 2 = Edge triggered, edge on pin delays conversion by delay param (above) ++ * 3 = Edge triggered, edge on pin starts conversion after delay param ++ */ ++static int mask = 0; ++module_param(mask, int, 0); ++MODULE_PARM_DESC(mask, "Set adc mask function."); ++ ++/* ++ * Coordinate Polling Enable. ++ * ++ * Set to 1 to enable coordinate polling. e.g. x,y[,p] is sampled together ++ * for every poll. ++ */ ++static int coord = 1; ++module_param(coord, int, 0); ++MODULE_PARM_DESC(coord, "Polling coordinate mode"); ++ ++/* ++ * ADC sample delay times in uS ++ */ ++static const int delay_table[] = { ++ 21, // 1 AC97 Link frames ++ 42, // 2 ++ 84, // 4 ++ 167, // 8 ++ 333, // 16 ++ 667, // 32 ++ 1000, // 48 ++ 1333, // 64 ++ 2000, // 96 ++ 2667, // 128 ++ 3333, // 160 ++ 4000, // 192 ++ 4667, // 224 ++ 5333, // 256 ++ 6000, // 288 ++ 0 // No delay, switch matrix always on ++}; ++ ++/* ++ * Delay after issuing a POLL command. ++ * ++ * The delay is 3 AC97 link frames + the touchpanel settling delay ++ */ ++static inline void poll_delay(int d) ++{ ++ udelay (3 * AC97_LINK_FRAME + delay_table [d]); ++} ++ ++/* ++ * set up the physical settings of the WM9713 ++ */ ++static void init_wm9713_phy(struct wm97xx* wm) ++{ ++ u16 dig1 = 0, dig2, dig3; ++ ++ /* default values */ ++ dig2 = WM97XX_DELAY(4) | WM97XX_SLT(5); ++ dig3= WM9712_RPU(1); ++ ++ /* rpu */ ++ if (rpu) { ++ dig3 &= 0xffc0; ++ dig3 |= WM9712_RPU(rpu); ++ info("setting pen detect pull-up to %d Ohms",64000 / rpu); ++ } ++ ++ /* touchpanel pressure */ ++ if (pil == 2) { ++ dig3 |= WM9712_PIL; ++ info("setting pressure measurement current to 400uA."); ++ } else if (pil) ++ info ("setting pressure measurement current to 200uA."); ++ if(!pil) ++ pressure = 0; ++ ++ /* sample settling delay */ ++ if (delay < 0 || delay > 15) { ++ info ("supplied delay out of range."); ++ delay = 4; ++ info("setting adc sample delay to %d u Secs.", delay_table[delay]); ++ } ++ dig2 &= 0xff0f; ++ dig2 |= WM97XX_DELAY(delay); ++ ++ /* mask */ ++ dig3 |= ((mask & 0x3) << 4); ++ if(coord) ++ dig3 |= WM9713_WAIT; ++ ++ wm->misc = wm97xx_reg_read(wm, 0x5a); ++ ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG2, dig2); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, dig3); ++ wm97xx_reg_write(wm, AC97_GPIO_STICKY, 0x0); ++} ++ ++static int wm9713_digitiser_ioctl(struct wm97xx* wm, int cmd) ++{ ++ u16 val = 0; ++ ++ switch(cmd){ ++ case WM97XX_DIG_START: ++ val = wm97xx_reg_read(wm, AC97_EXTENDED_MID); ++ wm97xx_reg_write(wm, AC97_EXTENDED_MID, val & 0x7fff); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2] | WM97XX_PRP_DET_DIG); ++ wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */ ++ break; ++ case WM97XX_DIG_STOP: ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2] & ~WM97XX_PRP_DET_DIG); ++ val = wm97xx_reg_read(wm, AC97_EXTENDED_MID); ++ wm97xx_reg_write(wm, AC97_EXTENDED_MID, val | 0x8000); ++ break; ++ case WM97XX_AUX_PREPARE: ++ memcpy(wm->dig_save, wm->dig, sizeof(wm->dig)); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, 0); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG2, 0); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, WM97XX_PRP_DET_DIG); ++ break; ++ case WM97XX_DIG_RESTORE: ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, wm->dig_save[0]); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG2, wm->dig_save[1]); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig_save[2]); ++ break; ++ case WM97XX_PHY_INIT: ++ init_wm9713_phy(wm); ++ break; ++ default: ++ return -EINVAL; ++ } ++ return 0; ++} ++ ++static inline int is_pden (struct wm97xx* wm) ++{ ++ return wm->dig[2] & WM9713_PDEN; ++} ++ ++/* ++ * Read a sample from the WM9713 adc in polling mode. ++ */ ++static int wm9713_poll_sample (struct wm97xx* wm, int adcsel, int *sample) ++{ ++ u16 dig1; ++ int timeout = 5 * delay; ++ ++ if (!wm->pen_probably_down) { ++ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (!(data & WM97XX_PEN_DOWN)) ++ return RC_PENUP; ++ wm->pen_probably_down = 1; ++ } ++ ++ /* set up digitiser */ ++ if (adcsel & 0x8000) ++ adcsel = 1 << ((adcsel & 0x7fff) + 3); ++ ++ dig1 = wm97xx_reg_read(wm, AC97_WM9713_DIG1); ++ dig1 &= ~WM9713_ADCSEL_MASK; ++ ++ if (wm->mach_ops && wm->mach_ops->pre_sample) ++ wm->mach_ops->pre_sample(adcsel); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1 | adcsel |WM9713_POLL); ++ ++ /* wait 3 AC97 time slots + delay for conversion */ ++ poll_delay(delay); ++ ++ /* wait for POLL to go low */ ++ while ((wm97xx_reg_read(wm, AC97_WM9713_DIG1) & WM9713_POLL) && timeout) { ++ udelay(AC97_LINK_FRAME); ++ timeout--; ++ } ++ ++ if (timeout <= 0) { ++ /* If PDEN is set, we can get a timeout when pen goes up */ ++ if (is_pden(wm)) ++ wm->pen_probably_down = 0; ++ else ++ dbg ("adc sample timeout"); ++ return RC_PENUP; ++ } ++ ++ *sample =wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (wm->mach_ops && wm->mach_ops->post_sample) ++ wm->mach_ops->post_sample(adcsel); ++ ++ /* check we have correct sample */ ++ if ((*sample & WM97XX_ADCSRC_MASK) != ffs(adcsel >> 1) << 12) { ++ dbg ("adc wrong sample, read %x got %x", adcsel, ++ *sample & WM97XX_ADCSRC_MASK); ++ return RC_PENUP; ++ } ++ ++ if (!(*sample & WM97XX_PEN_DOWN)) { ++ wm->pen_probably_down = 0; ++ return RC_PENUP; ++ } ++ ++ return RC_VALID; ++} ++ ++/* ++ * Read a coordinate from the WM9713 adc in polling mode. ++ */ ++static int wm9713_poll_coord (struct wm97xx* wm, struct wm97xx_data *data) ++{ ++ u16 dig1; ++ int timeout = 5 * delay; ++ ++ if (!wm->pen_probably_down) { ++ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (!(data & WM97XX_PEN_DOWN)) ++ return RC_PENUP; ++ wm->pen_probably_down = 1; ++ } ++ ++ /* set up digitiser */ ++ dig1 = wm97xx_reg_read(wm, AC97_WM9713_DIG1); ++ dig1 &= ~WM9713_ADCSEL_MASK; ++ if(pil) ++ dig1 |= WM97XX_ADCSEL_PRES; ++ ++ if (wm->mach_ops && wm->mach_ops->pre_sample) ++ wm->mach_ops->pre_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1 | WM9713_POLL | WM9713_COO); ++ ++ /* wait 3 AC97 time slots + delay for conversion */ ++ poll_delay(delay); ++ data->x = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ /* wait for POLL to go low */ ++ while ((wm97xx_reg_read(wm, AC97_WM9713_DIG1) & WM9713_POLL) && timeout) { ++ udelay(AC97_LINK_FRAME); ++ timeout--; ++ } ++ ++ if (timeout <= 0) { ++ /* If PDEN is set, we can get a timeout when pen goes up */ ++ if (is_pden(wm)) ++ wm->pen_probably_down = 0; ++ else ++ dbg ("adc sample timeout"); ++ return RC_PENUP; ++ } ++ ++ /* read back data */ ++ data->y = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (pil) ++ data->p = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ else ++ data->p = DEFAULT_PRESSURE; ++ ++ if (wm->mach_ops && wm->mach_ops->post_sample) ++ wm->mach_ops->post_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); ++ ++ /* check we have correct sample */ ++ if (!(data->x & WM97XX_ADCSEL_X) || !(data->y & WM97XX_ADCSEL_Y)) ++ goto err; ++ if(pil && !(data->p & WM97XX_ADCSEL_PRES)) ++ goto err; ++ ++ if (!(data->x & WM97XX_PEN_DOWN)) { ++ wm->pen_probably_down = 0; ++ return RC_PENUP; ++ } ++ return RC_VALID; ++err: ++ return RC_PENUP; ++} ++ ++/* ++ * Sample the WM9713 touchscreen in polling mode ++ */ ++static int wm9713_poll_touch(struct wm97xx* wm, struct wm97xx_data *data) ++{ ++ int rc; ++ ++ if(coord) { ++ if((rc = wm9713_poll_coord(wm, data)) != RC_VALID) ++ return rc; ++ } else { ++ if ((rc = wm9713_poll_sample(wm, WM9713_ADCSEL_X, &data->x)) != RC_VALID) ++ return rc; ++ if ((rc = wm9713_poll_sample(wm, WM9713_ADCSEL_Y, &data->y)) != RC_VALID) ++ return rc; ++ if (pil) { ++ if ((rc = wm9713_poll_sample(wm, WM9713_ADCSEL_PRES, &data->p)) != RC_VALID) ++ return rc; ++ } else ++ data->p = DEFAULT_PRESSURE; ++ } ++ return RC_VALID; ++} ++ ++/* ++ * Enable WM9713 continuous mode, i.e. touch data is streamed across an AC97 slot ++ */ ++static int wm9713_acc_enable (struct wm97xx* wm, int enable) ++{ ++ u16 dig1, dig2, dig3; ++ int ret = 0; ++ ++ dig1 = wm->dig[0]; ++ dig2 = wm->dig[1]; ++ dig3 = wm->dig[2]; ++ ++ if (enable) { ++ /* continous mode */ ++ if (wm->mach_ops->acc_startup && ++ (ret = wm->mach_ops->acc_startup(wm)) < 0) ++ return ret; ++ ++ dig1 &= ~WM9713_ADCSEL_MASK; ++ dig1 |= WM9713_CTC | WM9713_COO | WM9713_ADCSEL_X | WM9713_ADCSEL_Y; ++ if (pil) ++ dig1 |= WM9713_ADCSEL_PRES; ++ dig2 &= ~(WM97XX_DELAY_MASK | WM97XX_SLT_MASK | WM97XX_CM_RATE_MASK); ++ dig2 |= WM97XX_SLEN | WM97XX_DELAY (delay) | ++ WM97XX_SLT (wm->acc_slot) | WM97XX_RATE (wm->acc_rate); ++ dig3 |= WM9713_PDEN; ++ } else { ++ dig1 &= ~(WM9713_CTC | WM9713_COO); ++ dig2 &= ~WM97XX_SLEN; ++ dig3 &= ~WM9713_PDEN; ++ if (wm->mach_ops->acc_shutdown) ++ wm->mach_ops->acc_shutdown(wm); ++ } ++ ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG2, dig2); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, dig3); ++ return ret; ++} ++ ++struct wm97xx_codec_drv wm97xx_codec = { ++ .id = WM9713_ID2, ++ .name = "wm9713", ++ .poll_sample = wm9713_poll_sample, ++ .poll_touch = wm9713_poll_touch, ++ .acc_enable = wm9713_acc_enable, ++ .digitiser_ioctl = wm9713_digitiser_ioctl, ++}; ++ ++EXPORT_SYMBOL_GPL(wm97xx_codec); ++ ++/* Module information */ ++MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); ++MODULE_DESCRIPTION("WM9713 Touch Screen Driver"); ++MODULE_LICENSE("GPL"); +Index: linux-2.6.17/drivers/input/touchscreen/wm97xx-core.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.17/drivers/input/touchscreen/wm97xx-core.c 2006-09-19 20:36:47.969052000 +0200 +@@ -0,0 +1,912 @@ ++/* ++ * wm97xx-core.c -- Touch screen driver core for Wolfson WM9705, WM9712 ++ * and WM9713 AC97 Codecs. ++ * ++ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC. ++ * Author: Liam Girdwood ++ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com ++ * Parts Copyright : Ian Molton <spyro@f2s.com> ++ * Andrew Zabolotny <zap@homelink.ru> ++ * Russell King <rmk@arm.linux.org.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * Notes: ++ * ++ * Features: ++ * - supports WM9705, WM9712, WM9713 ++ * - polling mode ++ * - continuous mode (arch-dependent) ++ * - adjustable rpu/dpp settings ++ * - adjustable pressure current ++ * - adjustable sample settle delay ++ * - 4 and 5 wire touchscreens (5 wire is WM9712 only) ++ * - pen down detection ++ * - battery monitor ++ * - sample AUX adc's ++ * - power management ++ * - codec GPIO ++ * - codec event notification ++ * Todo ++ * - Support for async sampling control for noisy LCD's. ++ * ++ * Revision history ++ * 7th May 2003 Initial version. ++ * 6th June 2003 Added non module support and AC97 registration. ++ * 18th June 2003 Added AUX adc sampling. ++ * 23rd June 2003 Did some minimal reformatting, fixed a couple of ++ * codec_mutexing bugs and noted a race to fix. ++ * 24th June 2003 Added power management and fixed race condition. ++ * 10th July 2003 Changed to a misc device. ++ * 31st July 2003 Moved TS_EVENT and TS_CAL to wm97xx.h ++ * 8th Aug 2003 Added option for read() calling wm97xx_sample_touch() ++ * because some ac97_read/ac_97_write call schedule() ++ * 7th Nov 2003 Added Input touch event interface, stanley.cai@intel.com ++ * 13th Nov 2003 Removed h3600 touch interface, added interrupt based ++ * pen down notification and implemented continous mode ++ * on XScale arch. ++ * 16th Nov 2003 Ian Molton <spyro@f2s.com> ++ * Modified so that it suits the new 2.6 driver model. ++ * 25th Jan 2004 Andrew Zabolotny <zap@homelink.ru> ++ * Implemented IRQ-driven pen down detection, implemented ++ * the private API meant to be exposed to platform-specific ++ * drivers, reorganized the driver so that it supports ++ * an arbitrary number of devices. ++ * 1st Feb 2004 Moved continuous mode handling to a separate ++ * architecture-dependent file. For now only PXA ++ * built-in AC97 controller is supported (pxa-ac97-wm97xx.c). ++ * 11th Feb 2004 Reduced CPU usage by keeping a cached copy of both ++ * digitizer registers instead of reading them every time. ++ * A reorganization of the whole code for better ++ * error handling. ++ * 17th Apr 2004 Added BMON support. ++ * 17th Nov 2004 Added codec GPIO, codec event handling (real and virtual ++ * GPIOs) and 2.6 power management. ++ * 29th Nov 2004 Added WM9713 support. ++ * 4th Jul 2005 Moved codec specific code out to seperate files. ++ * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com> ++ * Added bus interface. ++ */ ++ ++#include <linux/module.h> ++#include <linux/moduleparam.h> ++#include <linux/version.h> ++#include <linux/kernel.h> ++#include <linux/init.h> ++#include <linux/delay.h> ++#include <linux/string.h> ++#include <linux/proc_fs.h> ++#include <linux/pm.h> ++#include <linux/interrupt.h> ++#include <linux/bitops.h> ++#include <linux/workqueue.h> ++#include <linux/device.h> ++#include <linux/wm97xx.h> ++#include <asm/uaccess.h> ++#include <asm/io.h> ++ ++#define TS_NAME "wm97xx" ++#define WM_CORE_VERSION "0.63" ++#define DEFAULT_PRESSURE 0xb0c0 ++ ++/* ++ * WM97xx - enable/disable AUX ADC sysfs ++ */ ++static int aux_sys = 1; ++module_param(aux_sys, int, 0); ++MODULE_PARM_DESC(aux_sys, "enable AUX ADC sysfs entries"); ++ ++/* ++ * WM97xx - enable/disable codec status sysfs ++ */ ++static int status_sys = 1; ++module_param(status_sys, int, 0); ++MODULE_PARM_DESC(status_sys, "enable codec status sysfs entries"); ++ ++/* ++ * Touchscreen absolute values ++ * ++ * These parameters are used to help the input layer discard out of ++ * range readings and reduce jitter etc. ++ * ++ * o min, max:- indicate the min and max values your touch screen returns ++ * o fuzz:- use a higher number to reduce jitter ++ * ++ * The default values correspond to Mainstone II in QVGA mode ++ * ++ * Please read ++ * Documentation/input/input-programming.txt for more details. ++ */ ++ ++static int abs_x[3] = {350,3900,5}; ++module_param_array(abs_x, int, NULL, 0); ++MODULE_PARM_DESC(abs_x, "Touchscreen absolute X min, max, fuzz"); ++ ++static int abs_y[3] = {320,3750,40}; ++module_param_array(abs_y, int, NULL, 0); ++MODULE_PARM_DESC(abs_y, "Touchscreen absolute Y min, max, fuzz"); ++ ++static int abs_p[3] = {0,150,4}; ++module_param_array(abs_p, int, NULL, 0); ++MODULE_PARM_DESC(abs_p, "Touchscreen absolute Pressure min, max, fuzz"); ++ ++/* ++ * Debug ++ */ ++#if 0 ++#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg) ++#else ++#define dbg(format, arg...) ++#endif ++#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg) ++#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg) ++#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg) ++ ++/* codec AC97 IO access */ ++int wm97xx_reg_read(struct wm97xx *wm, u16 reg) ++{ ++ if (wm->ac97) ++ return wm->ac97->bus->ops->read(wm->ac97, reg); ++ else ++ return -1; ++} ++ ++void wm97xx_reg_write(struct wm97xx *wm, u16 reg, u16 val) ++{ ++ /* cache digitiser registers */ ++ if(reg >= AC97_WM9713_DIG1 && reg <= AC97_WM9713_DIG3) ++ wm->dig[(reg - AC97_WM9713_DIG1) >> 1] = val; ++ ++ /* cache gpio regs */ ++ if(reg >= AC97_GPIO_CFG && reg <= AC97_MISC_AFE) ++ wm->gpio[(reg - AC97_GPIO_CFG) >> 1] = val; ++ ++ /* wm9713 irq reg */ ++ if(reg == 0x5a) ++ wm->misc = val; ++ ++ if (wm->ac97) ++ wm->ac97->bus->ops->write(wm->ac97, reg, val); ++} ++ ++ ++/** ++ * wm97xx_read_aux_adc - Read the aux adc. ++ * @wm: wm97xx device. ++ * @adcsel: codec ADC to be read ++ * ++ * Reads the selected AUX ADC. ++ */ ++ ++int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel) ++{ ++ int power_adc = 0, auxval; ++ u16 power = 0; ++ ++ /* get codec */ ++ mutex_lock(&wm->codec_mutex); ++ ++ /* When the touchscreen is not in use, we may have to power up the AUX ADC ++ * before we can use sample the AUX inputs-> ++ */ ++ if (wm->id == WM9713_ID2 && ++ (power = wm97xx_reg_read(wm, AC97_EXTENDED_MID)) & 0x8000) { ++ power_adc = 1; ++ wm97xx_reg_write(wm, AC97_EXTENDED_MID, power & 0x7fff); ++ } ++ ++ /* Prepare the codec for AUX reading */ ++ wm->codec->digitiser_ioctl(wm, WM97XX_AUX_PREPARE); ++ ++ /* Turn polling mode on to read AUX ADC */ ++ wm->pen_probably_down = 1; ++ wm->codec->poll_sample(wm, adcsel, &auxval); ++ ++ if (power_adc) ++ wm97xx_reg_write(wm, AC97_EXTENDED_MID, power | 0x8000); ++ ++ wm->codec->digitiser_ioctl(wm, WM97XX_DIG_RESTORE); ++ ++ wm->pen_probably_down = 0; ++ ++ mutex_unlock(&wm->codec_mutex); ++ return auxval & 0xfff; ++} ++ ++#define WM97XX_AUX_ATTR(name,input) \ ++static ssize_t name##_show(struct device *dev, struct device_attribute *attr, char *buf) \ ++{ \ ++ struct wm97xx *wm = (struct wm97xx*)dev->driver_data; \ ++ return sprintf(buf, "%d\n", wm97xx_read_aux_adc(wm, input)); \ ++} \ ++static DEVICE_ATTR(name, 0444, name##_show, NULL) ++ ++WM97XX_AUX_ATTR(aux1, WM97XX_AUX_ID1); ++WM97XX_AUX_ATTR(aux2, WM97XX_AUX_ID2); ++WM97XX_AUX_ATTR(aux3, WM97XX_AUX_ID3); ++WM97XX_AUX_ATTR(aux4, WM97XX_AUX_ID4); ++ ++#define WM97XX_STATUS_ATTR(name) \ ++static ssize_t name##_show(struct device *dev, struct device_attribute *attr, char *buf) \ ++{ \ ++ struct wm97xx *wm = (struct wm97xx*)dev->driver_data; \ ++ return sprintf(buf, "%d\n", wm97xx_reg_read(wm, AC97_GPIO_STATUS)); \ ++} \ ++static DEVICE_ATTR(name, 0444, name##_show, NULL) ++ ++WM97XX_STATUS_ATTR(gpio); ++ ++static int wm97xx_sys_add(struct device *dev) ++{ ++ if (aux_sys) { ++ device_create_file(dev, &dev_attr_aux1); ++ device_create_file(dev, &dev_attr_aux2); ++ device_create_file(dev, &dev_attr_aux3); ++ device_create_file(dev, &dev_attr_aux4); ++ } ++ if (status_sys) ++ device_create_file(dev, &dev_attr_gpio); ++ return 0; ++} ++ ++static void wm97xx_sys_remove(struct device *dev) ++{ ++ if (status_sys) ++ device_remove_file(dev, &dev_attr_gpio); ++ if (aux_sys) { ++ device_remove_file(dev, &dev_attr_aux1); ++ device_remove_file(dev, &dev_attr_aux2); ++ device_remove_file(dev, &dev_attr_aux3); ++ device_remove_file(dev, &dev_attr_aux4); ++ } ++} ++ ++/** ++ * wm97xx_get_gpio - Get the status of a codec GPIO. ++ * @wm: wm97xx device. ++ * @gpio: gpio ++ * ++ * Get the status of a codec GPIO pin ++ */ ++ ++wm97xx_gpio_status_t wm97xx_get_gpio(struct wm97xx *wm, u32 gpio) ++{ ++ u16 status; ++ wm97xx_gpio_status_t ret; ++ ++ mutex_lock(&wm->codec_mutex); ++ status = wm97xx_reg_read(wm, AC97_GPIO_STATUS); ++ ++ if (status & gpio) ++ ret = WM97XX_GPIO_HIGH; ++ else ++ ret = WM97XX_GPIO_LOW; ++ ++ mutex_unlock(&wm->codec_mutex); ++ return ret; ++} ++ ++/** ++ * wm97xx_set_gpio - Set the status of a codec GPIO. ++ * @wm: wm97xx device. ++ * @gpio: gpio ++ * ++ * ++ * Set the status of a codec GPIO pin ++ */ ++ ++void wm97xx_set_gpio(struct wm97xx *wm, u32 gpio, ++ wm97xx_gpio_status_t status) ++{ ++ u16 reg; ++ ++ mutex_lock(&wm->codec_mutex); ++ reg = wm97xx_reg_read(wm, AC97_GPIO_STATUS); ++ ++ if (status & WM97XX_GPIO_HIGH) ++ reg |= gpio; ++ else ++ reg &= ~gpio; ++ ++ if (wm->id == WM9712_ID2) ++ wm97xx_reg_write(wm, AC97_GPIO_STATUS, reg << 1); ++ else ++ wm97xx_reg_write(wm, AC97_GPIO_STATUS, reg); ++ mutex_unlock(&wm->codec_mutex); ++} ++ ++/* ++ * Codec GPIO pin configuration, this set's pin direction, polarity, ++ * stickyness and wake up. ++ */ ++void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio, wm97xx_gpio_dir_t dir, ++ wm97xx_gpio_pol_t pol, wm97xx_gpio_sticky_t sticky, ++ wm97xx_gpio_wake_t wake) ++{ ++ u16 reg; ++ ++ mutex_lock(&wm->codec_mutex); ++ reg = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); ++ ++ if (pol == WM97XX_GPIO_POL_HIGH) ++ reg |= gpio; ++ else ++ reg &= ~gpio; ++ ++ wm97xx_reg_write(wm, AC97_GPIO_POLARITY, reg); ++ reg = wm97xx_reg_read(wm, AC97_GPIO_STICKY); ++ ++ if (sticky == WM97XX_GPIO_STICKY) ++ reg |= gpio; ++ else ++ reg &= ~gpio; ++ ++ wm97xx_reg_write(wm, AC97_GPIO_STICKY, reg); ++ reg = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP); ++ ++ if (wake == WM97XX_GPIO_WAKE) ++ reg |= gpio; ++ else ++ reg &= ~gpio; ++ ++ wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, reg); ++ reg = wm97xx_reg_read(wm, AC97_GPIO_CFG); ++ ++ if (dir == WM97XX_GPIO_IN) ++ reg |= gpio; ++ else ++ reg &= ~gpio; ++ ++ wm97xx_reg_write(wm, AC97_GPIO_CFG, reg); ++ mutex_unlock(&wm->codec_mutex); ++} ++ ++/* ++ * Handle a pen down interrupt. ++ */ ++static void wm97xx_pen_irq_worker(void *ptr) ++{ ++ struct wm97xx *wm = (struct wm97xx *) ptr; ++ ++ /* do we need to enable the touch panel reader */ ++ if (wm->id == WM9705_ID2) { ++ if (wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD) & WM97XX_PEN_DOWN) ++ wm->pen_is_down = 1; ++ else ++ wm->pen_is_down = 0; ++ wake_up_interruptible(&wm->pen_irq_wait); ++ } else { ++ u16 status, pol; ++ mutex_lock(&wm->codec_mutex); ++ status = wm97xx_reg_read(wm, AC97_GPIO_STATUS); ++ pol = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); ++ ++ if (WM97XX_GPIO_13 & pol & status) { ++ wm->pen_is_down = 1; ++ wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol & ~WM97XX_GPIO_13); ++ } else { ++ wm->pen_is_down = 0; ++ wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol | WM97XX_GPIO_13); ++ } ++ ++ if (wm->id == WM9712_ID2) ++ wm97xx_reg_write(wm, AC97_GPIO_STATUS, (status & ~WM97XX_GPIO_13) << 1); ++ else ++ wm97xx_reg_write(wm, AC97_GPIO_STATUS, status & ~WM97XX_GPIO_13); ++ mutex_unlock(&wm->codec_mutex); ++ wake_up_interruptible(&wm->pen_irq_wait); ++ } ++ ++ if (!wm->pen_is_down && wm->mach_ops && wm->mach_ops->acc_enabled) ++ wm->mach_ops->acc_pen_up(wm); ++ enable_irq(wm->pen_irq); ++} ++ ++/* ++ * Codec PENDOWN irq handler ++ * ++ * We have to disable the codec interrupt in the handler because it can ++ * take upto 1ms to clear the interrupt source. The interrupt is then enabled ++ * again in the slow handler when the source has been cleared. ++ */ ++static irqreturn_t wm97xx_pen_interrupt(int irq, void *dev_id, ++ struct pt_regs *regs) ++{ ++ struct wm97xx *wm = (struct wm97xx *) dev_id; ++ disable_irq(wm->pen_irq); ++ queue_work(wm->pen_irq_workq, &wm->pen_event_work); ++ return IRQ_HANDLED; ++} ++ ++/* ++ * initialise pen IRQ handler and workqueue ++ */ ++static int wm97xx_init_pen_irq(struct wm97xx *wm) ++{ ++ u16 reg; ++ ++ INIT_WORK(&wm->pen_event_work, wm97xx_pen_irq_worker, wm); ++ if ((wm->pen_irq_workq = ++ create_singlethread_workqueue("kwm97pen")) == NULL) { ++ err("could not create pen irq work queue"); ++ wm->pen_irq = 0; ++ return -EINVAL; ++ } ++ ++ if (request_irq (wm->pen_irq, wm97xx_pen_interrupt, SA_SHIRQ, "wm97xx-pen", wm)) { ++ err("could not register codec pen down interrupt, will poll for pen down"); ++ destroy_workqueue(wm->pen_irq_workq); ++ wm->pen_irq = 0; ++ return -EINVAL; ++ } ++ ++ /* enable PEN down on wm9712/13 */ ++ if (wm->id != WM9705_ID2) { ++ reg = wm97xx_reg_read(wm, AC97_MISC_AFE); ++ wm97xx_reg_write(wm, AC97_MISC_AFE, reg & 0xfffb); ++ reg = wm97xx_reg_read(wm, 0x5a); ++ wm97xx_reg_write(wm, 0x5a, reg & ~0x0001); ++ } ++ ++ return 0; ++} ++ ++/* Private struct for communication between struct wm97xx_tshread ++ * and wm97xx_read_samples */ ++struct ts_state { ++ int sleep_time; ++ int min_sleep_time; ++}; ++ ++static int wm97xx_read_samples(struct wm97xx *wm, struct ts_state *state) ++{ ++ struct wm97xx_data data; ++ int rc; ++ ++ mutex_lock(&wm->codec_mutex); ++ ++ if (wm->mach_ops && wm->mach_ops->acc_enabled) ++ rc = wm->mach_ops->acc_pen_down(wm); ++ else ++ rc = wm->codec->poll_touch(wm, &data); ++ ++ if (rc & RC_PENUP) { ++ if (wm->pen_is_down) { ++ wm->pen_is_down = 0; ++ dbg("pen up"); ++ input_report_abs(wm->input_dev, ABS_PRESSURE, 0); ++ input_sync(wm->input_dev); ++ } else if (!(rc & RC_AGAIN)) { ++ /* We need high frequency updates only while pen is down, ++ * the user never will be able to touch screen faster than ++ * a few times per second... On the other hand, when the ++ * user is actively working with the touchscreen we don't ++ * want to lose the quick response. So we will slowly ++ * increase sleep time after the pen is up and quicky ++ * restore it to ~one task switch when pen is down again. ++ */ ++ if (state->sleep_time < HZ / 10) ++ state->sleep_time++; ++ } ++ ++ } else if (rc & RC_VALID) { ++ dbg("pen down: x=%x:%d, y=%x:%d, pressure=%x:%d\n", ++ data.x >> 12, data.x & 0xfff, data.y >> 12, ++ data.y & 0xfff, data.p >> 12, data.p & 0xfff); ++ input_report_abs(wm->input_dev, ABS_X, data.x & 0xfff); ++ input_report_abs(wm->input_dev, ABS_Y, data.y & 0xfff); ++ input_report_abs(wm->input_dev, ABS_PRESSURE, data.p & 0xfff); ++ input_sync(wm->input_dev); ++ wm->pen_is_down = 1; ++ state->sleep_time = state->min_sleep_time; ++ } else if (rc & RC_PENDOWN) { ++ dbg("pen down"); ++ wm->pen_is_down = 1; ++ state->sleep_time = state->min_sleep_time; ++ } ++ ++ mutex_unlock(&wm->codec_mutex); ++ return rc; ++} ++ ++/* ++* The touchscreen sample reader thread. ++*/ ++static int wm97xx_ts_read(void *data) ++{ ++ int rc; ++ struct ts_state state; ++ struct wm97xx *wm = (struct wm97xx *) data; ++ ++ /* set up thread context */ ++ wm->ts_task = current; ++ daemonize("kwm97xxts"); ++ ++ if (wm->codec == NULL) { ++ wm->ts_task = NULL; ++ printk(KERN_ERR "codec is NULL, bailing\n"); ++ } ++ ++ complete(&wm->ts_init); ++ wm->pen_is_down = 0; ++ state.min_sleep_time = HZ >= 100 ? HZ / 100 : 1; ++ if (state.min_sleep_time < 1) ++ state.min_sleep_time = 1; ++ state.sleep_time = state.min_sleep_time; ++ ++ /* touch reader loop */ ++ while (wm->ts_task) { ++ do { ++ try_to_freeze(); ++ rc = wm97xx_read_samples(wm, &state); ++ } while (rc & RC_AGAIN); ++ if (!wm->pen_is_down && wm->pen_irq) { ++ /* Nice, we don't have to poll for pen down event */ ++ wait_event_interruptible(wm->pen_irq_wait, wm->pen_is_down); ++ } else { ++ set_task_state(current, TASK_INTERRUPTIBLE); ++ schedule_timeout(state.sleep_time); ++ } ++ } ++ complete_and_exit(&wm->ts_exit, 0); ++} ++ ++/** ++ * wm97xx_ts_input_open - Open the touch screen input device. ++ * @idev: Input device to be opened. ++ * ++ * Called by the input sub system to open a wm97xx touchscreen device. ++ * Starts the touchscreen thread and touch digitiser. ++ */ ++static int wm97xx_ts_input_open(struct input_dev *idev) ++{ ++ int ret = 0; ++ struct wm97xx *wm = (struct wm97xx *) idev->private; ++ ++ mutex_lock(&wm->codec_mutex); ++ /* first time opened ? */ ++ if (wm->ts_use_count++ == 0) { ++ /* start touchscreen thread */ ++ init_completion(&wm->ts_init); ++ init_completion(&wm->ts_exit); ++ ret = kernel_thread(wm97xx_ts_read, wm, CLONE_KERNEL); ++ ++ if (ret >= 0) { ++ wait_for_completion(&wm->ts_init); ++ if (wm->ts_task == NULL) ++ ret = -EINVAL; ++ } else { ++ mutex_unlock(&wm->codec_mutex); ++ return ret; ++ } ++ ++ /* start digitiser */ ++ if (wm->mach_ops && wm->mach_ops->acc_enabled) ++ wm->codec->acc_enable(wm, 1); ++ wm->codec->digitiser_ioctl(wm, WM97XX_DIG_START); ++ ++ /* init pen down/up irq handling */ ++ if (wm->pen_irq) { ++ wm97xx_init_pen_irq(wm); ++ ++ if (wm->pen_irq == 0) { ++ /* we failed to get an irq for pen down events, ++ * so we resort to polling. kickstart the reader */ ++ wm->pen_is_down = 1; ++ wake_up_interruptible(&wm->pen_irq_wait); ++ } ++ } ++ } ++ ++ mutex_unlock(&wm->codec_mutex); ++ return 0; ++} ++ ++/** ++ * wm97xx_ts_input_close - Close the touch screen input device. ++ * @idev: Input device to be closed. ++ * ++ * Called by the input sub system to close a wm97xx touchscreen device. ++ * Kills the touchscreen thread and stops the touch digitiser. ++ */ ++ ++static void wm97xx_ts_input_close(struct input_dev *idev) ++{ ++ struct wm97xx *wm = (struct wm97xx *) idev->private; ++ ++ mutex_lock(&wm->codec_mutex); ++ if (--wm->ts_use_count == 0) { ++ /* destroy workqueues and free irqs */ ++ if (wm->pen_irq) { ++ free_irq(wm->pen_irq, wm); ++ destroy_workqueue(wm->pen_irq_workq); ++ } ++ ++ /* kill thread */ ++ if (wm->ts_task) { ++ wm->ts_task = NULL; ++ wm->pen_is_down = 1; ++ wake_up_interruptible(&wm->pen_irq_wait); ++ wait_for_completion(&wm->ts_exit); ++ wm->pen_is_down = 0; ++ } ++ ++ /* stop digitiser */ ++ wm->codec->digitiser_ioctl(wm, WM97XX_DIG_STOP); ++ if (wm->mach_ops && wm->mach_ops->acc_enabled) ++ wm->codec->acc_enable(wm, 0); ++ } ++ mutex_unlock(&wm->codec_mutex); ++} ++ ++static int wm97xx_bus_match(struct device *dev, struct device_driver *drv) ++{ ++ return !(strcmp(dev->bus_id,drv->name)); ++} ++ ++/* ++ * The AC97 audio driver will do all the Codec suspend and resume ++ * tasks. This is just for anything machine specific or extra. ++ */ ++static int wm97xx_bus_suspend(struct device *dev, pm_message_t state) ++{ ++ int ret = 0; ++ ++ if (dev->driver && dev->driver->suspend) ++ ret = dev->driver->suspend(dev, state); ++ ++ return ret; ++} ++ ++static int wm97xx_bus_resume(struct device *dev) ++{ ++ int ret = 0; ++ ++ if (dev->driver && dev->driver->resume) ++ ret = dev->driver->resume(dev); ++ ++ return ret; ++} ++ ++struct bus_type wm97xx_bus_type = { ++ .name = "wm97xx", ++ .match = wm97xx_bus_match, ++ .suspend = wm97xx_bus_suspend, ++ .resume = wm97xx_bus_resume, ++}; ++ ++static void wm97xx_release(struct device *dev) ++{ ++ kfree(dev); ++} ++ ++static int wm97xx_probe(struct device *dev) ++{ ++ struct wm97xx* wm; ++ int ret = 0, id = 0; ++ ++ if (!(wm = kzalloc(sizeof(struct wm97xx), GFP_KERNEL))) ++ return -ENOMEM; ++ mutex_init(&wm->codec_mutex); ++ ++ init_waitqueue_head(&wm->pen_irq_wait); ++ wm->dev = dev; ++ dev->driver_data = wm; ++ wm->ac97 = to_ac97_t(dev); ++ ++ /* check that we have a supported codec */ ++ if ((id = wm97xx_reg_read(wm, AC97_VENDOR_ID1)) != WM97XX_ID1) { ++ err("could not find a wm97xx, found a %x instead\n", id); ++ kfree(wm); ++ return -ENODEV; ++ } ++ ++ wm->id = wm97xx_reg_read(wm, AC97_VENDOR_ID2); ++ if(wm->id != wm97xx_codec.id) { ++ err("could not find a the selected codec, please build for wm97%2x", wm->id & 0xff); ++ kfree(wm); ++ return -ENODEV; ++ } ++ ++ if((wm->input_dev = input_allocate_device()) == NULL) { ++ kfree(wm); ++ return -ENOMEM; ++ } ++ ++ /* set up touch configuration */ ++ info("detected a wm97%2x codec", wm->id & 0xff); ++ wm->input_dev->name = "wm97xx touchscreen"; ++ wm->input_dev->open = wm97xx_ts_input_open; ++ wm->input_dev->close = wm97xx_ts_input_close; ++ set_bit(EV_ABS, wm->input_dev->evbit); ++ set_bit(ABS_X, wm->input_dev->absbit); ++ set_bit(ABS_Y, wm->input_dev->absbit); ++ set_bit(ABS_PRESSURE, wm->input_dev->absbit); ++ wm->input_dev->absmax[ABS_X] = abs_x[1]; ++ wm->input_dev->absmax[ABS_Y] = abs_y[1]; ++ wm->input_dev->absmax[ABS_PRESSURE] = abs_p[1]; ++ wm->input_dev->absmin[ABS_X] = abs_x[0]; ++ wm->input_dev->absmin[ABS_Y] = abs_y[0]; ++ wm->input_dev->absmin[ABS_PRESSURE] = abs_p[0]; ++ wm->input_dev->absfuzz[ABS_X] = abs_x[2]; ++ wm->input_dev->absfuzz[ABS_Y] = abs_y[2]; ++ wm->input_dev->absfuzz[ABS_PRESSURE] = abs_p[2]; ++ wm->input_dev->private = wm; ++ wm->codec = &wm97xx_codec; ++ if((ret = input_register_device(wm->input_dev)) < 0) { ++ kfree(wm); ++ return -ENOMEM; ++ } ++ ++ if(aux_sys) ++ wm97xx_sys_add(dev); ++ ++ /* set up physical characteristics */ ++ wm->codec->digitiser_ioctl(wm, WM97XX_PHY_INIT); ++ ++ /* load gpio cache */ ++ wm->gpio[0] = wm97xx_reg_read(wm, AC97_GPIO_CFG); ++ wm->gpio[1] = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); ++ wm->gpio[2] = wm97xx_reg_read(wm, AC97_GPIO_STICKY); ++ wm->gpio[3] = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP); ++ wm->gpio[4] = wm97xx_reg_read(wm, AC97_GPIO_STATUS); ++ wm->gpio[5] = wm97xx_reg_read(wm, AC97_MISC_AFE); ++ ++ /* register our battery device */ ++ if (!(wm->battery_dev = kzalloc(sizeof(struct device), GFP_KERNEL))) { ++ ret = -ENOMEM; ++ goto batt_err; ++ } ++ wm->battery_dev->bus = &wm97xx_bus_type; ++ strcpy(wm->battery_dev->bus_id,"wm97xx-battery"); ++ wm->battery_dev->driver_data = wm; ++ wm->battery_dev->parent = dev; ++ wm->battery_dev->release = wm97xx_release; ++ if((ret = device_register(wm->battery_dev)) < 0) ++ goto batt_reg_err; ++ ++ /* register our extended touch device (for machine specific extensions) */ ++ if (!(wm->touch_dev = kzalloc(sizeof(struct device), GFP_KERNEL))) { ++ ret = -ENOMEM; ++ goto touch_err; ++ } ++ wm->touch_dev->bus = &wm97xx_bus_type; ++ strcpy(wm->touch_dev->bus_id,"wm97xx-touchscreen"); ++ wm->touch_dev->driver_data = wm; ++ wm->touch_dev->parent = dev; ++ wm->touch_dev->release = wm97xx_release; ++ if((ret = device_register(wm->touch_dev)) < 0) ++ goto touch_reg_err; ++ ++ return ret; ++ ++touch_reg_err: ++ kfree(wm->touch_dev); ++touch_err: ++ device_unregister(wm->battery_dev); ++batt_reg_err: ++ kfree(wm->battery_dev); ++batt_err: ++ input_unregister_device(wm->input_dev); ++ kfree(wm); ++ return ret; ++} ++ ++static int wm97xx_remove(struct device *dev) ++{ ++ struct wm97xx *wm = dev_get_drvdata(dev); ++ ++ /* Stop touch reader thread */ ++ if (wm->ts_task) { ++ wm->ts_task = NULL; ++ wm->pen_is_down = 1; ++ wake_up_interruptible(&wm->pen_irq_wait); ++ wait_for_completion(&wm->ts_exit); ++ } ++ device_unregister(wm->battery_dev); ++ device_unregister(wm->touch_dev); ++ input_unregister_device(wm->input_dev); ++ ++ if(aux_sys) ++ wm97xx_sys_remove(dev); ++ ++ kfree(wm); ++ return 0; ++} ++ ++#ifdef CONFIG_PM ++int wm97xx_resume(struct device* dev) ++{ ++ struct wm97xx *wm = dev_get_drvdata(dev); ++ ++ /* restore digitiser and gpio's */ ++ if(wm->id == WM9713_ID2) { ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, wm->dig[0]); ++ wm97xx_reg_write(wm, 0x5a, wm->misc); ++ if(wm->ts_use_count) { ++ u16 reg = wm97xx_reg_read(wm, AC97_EXTENDED_MID) & 0x7fff; ++ wm97xx_reg_write(wm, AC97_EXTENDED_MID, reg); ++ } ++ } ++ ++ wm97xx_reg_write(wm, AC97_WM9713_DIG2, wm->dig[1]); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2]); ++ ++ wm97xx_reg_write(wm, AC97_GPIO_CFG, wm->gpio[0]); ++ wm97xx_reg_write(wm, AC97_GPIO_POLARITY, wm->gpio[1]); ++ wm97xx_reg_write(wm, AC97_GPIO_STICKY, wm->gpio[2]); ++ wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, wm->gpio[3]); ++ wm97xx_reg_write(wm, AC97_GPIO_STATUS, wm->gpio[4]); ++ wm97xx_reg_write(wm, AC97_MISC_AFE, wm->gpio[5]); ++ ++ return 0; ++} ++ ++#else ++#define wm97xx_resume NULL ++#endif ++ ++int wm97xx_register_mach_ops(struct wm97xx *wm, struct wm97xx_mach_ops *mach_ops) ++{ ++ mutex_lock(&wm->codec_mutex); ++ if(wm->mach_ops) { ++ mutex_unlock(&wm->codec_mutex); ++ return -EINVAL; ++ } ++ wm->mach_ops = mach_ops; ++ mutex_unlock(&wm->codec_mutex); ++ return 0; ++} ++ ++void wm97xx_unregister_mach_ops(struct wm97xx *wm) ++{ ++ mutex_lock(&wm->codec_mutex); ++ wm->mach_ops = NULL; ++ mutex_unlock(&wm->codec_mutex); ++} ++ ++static struct device_driver wm97xx_driver = { ++ .name = "ac97", ++ .bus = &ac97_bus_type, ++ .owner = THIS_MODULE, ++ .probe = wm97xx_probe, ++ .remove = wm97xx_remove, ++ .resume = wm97xx_resume, ++}; ++ ++static int __init wm97xx_init(void) ++{ ++ int ret; ++ ++ info("version %s liam.girdwood@wolfsonmicro.com", WM_CORE_VERSION); ++ if((ret = bus_register(&wm97xx_bus_type)) < 0) ++ return ret; ++ return driver_register(&wm97xx_driver); ++} ++ ++static void __exit wm97xx_exit(void) ++{ ++ driver_unregister(&wm97xx_driver); ++ bus_unregister(&wm97xx_bus_type); ++} ++ ++EXPORT_SYMBOL_GPL(wm97xx_get_gpio); ++EXPORT_SYMBOL_GPL(wm97xx_set_gpio); ++EXPORT_SYMBOL_GPL(wm97xx_config_gpio); ++EXPORT_SYMBOL_GPL(wm97xx_read_aux_adc); ++EXPORT_SYMBOL_GPL(wm97xx_reg_read); ++EXPORT_SYMBOL_GPL(wm97xx_reg_write); ++EXPORT_SYMBOL_GPL(wm97xx_bus_type); ++EXPORT_SYMBOL_GPL(wm97xx_register_mach_ops); ++EXPORT_SYMBOL_GPL(wm97xx_unregister_mach_ops); ++ ++module_init(wm97xx_init); ++module_exit(wm97xx_exit); ++ ++/* Module information */ ++MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); ++MODULE_DESCRIPTION("WM97xx Core - Touch Screen / AUX ADC / GPIO Driver"); ++MODULE_LICENSE("GPL"); +Index: linux-2.6.17/include/linux/wm97xx.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.17/include/linux/wm97xx.h 2006-09-19 20:36:47.973052250 +0200 +@@ -0,0 +1,291 @@ ++ ++/* ++ * Register bits and API for Wolfson WM97xx series of codecs ++ */ ++ ++#ifndef _LINUX_WM97XX_H ++#define _LINUX_WM97XX_H ++ ++#include <sound/driver.h> ++#include <sound/core.h> ++#include <sound/pcm.h> ++#include <sound/ac97_codec.h> ++#include <sound/initval.h> ++#include <linux/types.h> ++#include <linux/list.h> ++#include <linux/input.h> /* Input device layer */ ++ ++/* ++ * WM97xx AC97 Touchscreen registers ++ */ ++#define AC97_WM97XX_DIGITISER1 0x76 ++#define AC97_WM97XX_DIGITISER2 0x78 ++#define AC97_WM97XX_DIGITISER_RD 0x7a ++#define AC97_WM9713_DIG1 0x74 ++#define AC97_WM9713_DIG2 AC97_WM97XX_DIGITISER1 ++#define AC97_WM9713_DIG3 AC97_WM97XX_DIGITISER2 ++ ++/* ++ * WM97xx register bits ++ */ ++#define WM97XX_POLL 0x8000 /* initiate a polling measurement */ ++#define WM97XX_ADCSEL_X 0x1000 /* x coord measurement */ ++#define WM97XX_ADCSEL_Y 0x2000 /* y coord measurement */ ++#define WM97XX_ADCSEL_PRES 0x3000 /* pressure measurement */ ++#define WM97XX_ADCSEL_MASK 0x7000 ++#define WM97XX_COO 0x0800 /* enable coordinate mode */ ++#define WM97XX_CTC 0x0400 /* enable continuous mode */ ++#define WM97XX_CM_RATE_93 0x0000 /* 93.75Hz continuous rate */ ++#define WM97XX_CM_RATE_187 0x0100 /* 187.5Hz continuous rate */ ++#define WM97XX_CM_RATE_375 0x0200 /* 375Hz continuous rate */ ++#define WM97XX_CM_RATE_750 0x0300 /* 750Hz continuous rate */ ++#define WM97XX_CM_RATE_8K 0x00f0 /* 8kHz continuous rate */ ++#define WM97XX_CM_RATE_12K 0x01f0 /* 12kHz continuous rate */ ++#define WM97XX_CM_RATE_24K 0x02f0 /* 24kHz continuous rate */ ++#define WM97XX_CM_RATE_48K 0x03f0 /* 48kHz continuous rate */ ++#define WM97XX_CM_RATE_MASK 0x03f0 ++#define WM97XX_RATE(i) (((i & 3) << 8) | ((i & 4) ? 0xf0 : 0)) ++#define WM97XX_DELAY(i) ((i << 4) & 0x00f0) /* sample delay times */ ++#define WM97XX_DELAY_MASK 0x00f0 ++#define WM97XX_SLEN 0x0008 /* slot read back enable */ ++#define WM97XX_SLT(i) ((i - 5) & 0x7) /* touchpanel slot selection (5-11) */ ++#define WM97XX_SLT_MASK 0x0007 ++#define WM97XX_PRP_DETW 0x4000 /* pen detect on, digitiser off, wake up */ ++#define WM97XX_PRP_DET 0x8000 /* pen detect on, digitiser off, no wake up */ ++#define WM97XX_PRP_DET_DIG 0xc000 /* pen detect on, digitiser on */ ++#define WM97XX_RPR 0x2000 /* wake up on pen down */ ++#define WM97XX_PEN_DOWN 0x8000 /* pen is down */ ++#define WM97XX_ADCSRC_MASK 0x7000 /* ADC source mask */ ++ ++#define WM97XX_AUX_ID1 0x8001 ++#define WM97XX_AUX_ID2 0x8002 ++#define WM97XX_AUX_ID3 0x8003 ++#define WM97XX_AUX_ID4 0x8004 ++ ++ ++/* WM9712 Bits */ ++#define WM9712_45W 0x1000 /* set for 5-wire touchscreen */ ++#define WM9712_PDEN 0x0800 /* measure only when pen down */ ++#define WM9712_WAIT 0x0200 /* wait until adc is read before next sample */ ++#define WM9712_PIL 0x0100 /* current used for pressure measurement. set 400uA else 200uA */ ++#define WM9712_MASK_HI 0x0040 /* hi on mask pin (47) stops conversions */ ++#define WM9712_MASK_EDGE 0x0080 /* rising/falling edge on pin delays sample */ ++#define WM9712_MASK_SYNC 0x00c0 /* rising/falling edge on mask initiates sample */ ++#define WM9712_RPU(i) (i&0x3f) /* internal pull up on pen detect (64k / rpu) */ ++#define WM9712_PD(i) (0x1 << i) /* power management */ ++ ++/* WM9712 Registers */ ++#define AC97_WM9712_POWER 0x24 ++#define AC97_WM9712_REV 0x58 ++ ++/* WM9705 Bits */ ++#define WM9705_PDEN 0x1000 /* measure only when pen is down */ ++#define WM9705_PINV 0x0800 /* inverts sense of pen down output */ ++#define WM9705_BSEN 0x0400 /* BUSY flag enable, pin47 is 1 when busy */ ++#define WM9705_BINV 0x0200 /* invert BUSY (pin47) output */ ++#define WM9705_WAIT 0x0100 /* wait until adc is read before next sample */ ++#define WM9705_PIL 0x0080 /* current used for pressure measurement. set 400uA else 200uA */ ++#define WM9705_PHIZ 0x0040 /* set PHONE and PCBEEP inputs to high impedance */ ++#define WM9705_MASK_HI 0x0010 /* hi on mask stops conversions */ ++#define WM9705_MASK_EDGE 0x0020 /* rising/falling edge on pin delays sample */ ++#define WM9705_MASK_SYNC 0x0030 /* rising/falling edge on mask initiates sample */ ++#define WM9705_PDD(i) (i & 0x000f) /* pen detect comparator threshold */ ++ ++ ++/* WM9713 Bits */ ++#define WM9713_PDPOL 0x0400 /* Pen down polarity */ ++#define WM9713_POLL 0x0200 /* initiate a polling measurement */ ++#define WM9713_CTC 0x0100 /* enable continuous mode */ ++#define WM9713_ADCSEL_X 0x0002 /* X measurement */ ++#define WM9713_ADCSEL_Y 0x0004 /* Y measurement */ ++#define WM9713_ADCSEL_PRES 0x0008 /* Pressure measurement */ ++#define WM9713_COO 0x0001 /* enable coordinate mode */ ++#define WM9713_PDEN 0x0800 /* measure only when pen down */ ++#define WM9713_ADCSEL_MASK 0x00fe /* ADC selection mask */ ++#define WM9713_WAIT 0x0200 /* coordinate wait */ ++ ++/* AUX ADC ID's */ ++#define TS_COMP1 0x0 ++#define TS_COMP2 0x1 ++#define TS_BMON 0x2 ++#define TS_WIPER 0x3 ++ ++/* ID numbers */ ++#define WM97XX_ID1 0x574d ++#define WM9712_ID2 0x4c12 ++#define WM9705_ID2 0x4c05 ++#define WM9713_ID2 0x4c13 ++ ++/* Codec GPIO's */ ++#define WM97XX_MAX_GPIO 16 ++#define WM97XX_GPIO_1 (1 << 1) ++#define WM97XX_GPIO_2 (1 << 2) ++#define WM97XX_GPIO_3 (1 << 3) ++#define WM97XX_GPIO_4 (1 << 4) ++#define WM97XX_GPIO_5 (1 << 5) ++#define WM97XX_GPIO_6 (1 << 6) ++#define WM97XX_GPIO_7 (1 << 7) ++#define WM97XX_GPIO_8 (1 << 8) ++#define WM97XX_GPIO_9 (1 << 9) ++#define WM97XX_GPIO_10 (1 << 10) ++#define WM97XX_GPIO_11 (1 << 11) ++#define WM97XX_GPIO_12 (1 << 12) ++#define WM97XX_GPIO_13 (1 << 13) ++#define WM97XX_GPIO_14 (1 << 14) ++#define WM97XX_GPIO_15 (1 << 15) ++ ++ ++#define AC97_LINK_FRAME 21 /* time in uS for AC97 link frame */ ++ ++ ++/*---------------- Return codes from sample reading functions ---------------*/ ++ ++/* More data is available; call the sample gathering function again */ ++#define RC_AGAIN 0x00000001 ++/* The returned sample is valid */ ++#define RC_VALID 0x00000002 ++/* The pen is up (the first RC_VALID without RC_PENUP means pen is down) */ ++#define RC_PENUP 0x00000004 ++/* The pen is down (RC_VALID implies RC_PENDOWN, but sometimes it is helpful ++ to tell the handler that the pen is down but we don't know yet his coords, ++ so the handler should not sleep or wait for pendown irq) */ ++#define RC_PENDOWN 0x00000008 ++ ++/* The wm97xx driver provides a private API for writing platform-specific ++ * drivers. ++ */ ++ ++/* The structure used to return arch specific sampled data into */ ++struct wm97xx_data { ++ int x; ++ int y; ++ int p; ++}; ++ ++/* Codec GPIO status ++ */ ++typedef enum { ++ WM97XX_GPIO_HIGH, ++ WM97XX_GPIO_LOW ++} wm97xx_gpio_status_t; ++ ++/* Codec GPIO direction ++ */ ++typedef enum { ++ WM97XX_GPIO_IN, ++ WM97XX_GPIO_OUT ++} wm97xx_gpio_dir_t; ++ ++/* Codec GPIO polarity ++ */ ++typedef enum { ++ WM97XX_GPIO_POL_HIGH, ++ WM97XX_GPIO_POL_LOW ++} wm97xx_gpio_pol_t; ++ ++/* Codec GPIO sticky ++ */ ++typedef enum { ++ WM97XX_GPIO_STICKY, ++ WM97XX_GPIO_NOTSTICKY ++} wm97xx_gpio_sticky_t; ++ ++/* Codec GPIO wake ++ */ ++typedef enum { ++ WM97XX_GPIO_WAKE, ++ WM97XX_GPIO_NOWAKE ++} wm97xx_gpio_wake_t; ++ ++ ++/* ++ * Digitiser ioctl commands ++ */ ++#define WM97XX_DIG_START 0x1 ++#define WM97XX_DIG_STOP 0x2 ++#define WM97XX_PHY_INIT 0x3 ++#define WM97XX_AUX_PREPARE 0x4 ++#define WM97XX_DIG_RESTORE 0x5 ++ ++struct wm97xx; ++extern struct wm97xx_codec_drv wm97xx_codec; ++ ++/* ++ * Codec driver interface - allows mapping to WM9705/12/13 and newer codecs ++ */ ++struct wm97xx_codec_drv { ++ u16 id; ++ char *name; ++ int (*poll_sample) (struct wm97xx *, int adcsel, int *sample); /* read 1 sample */ ++ int (*poll_touch) (struct wm97xx *, struct wm97xx_data *); /* read X,Y,[P] in poll */ ++ int (*digitiser_ioctl) (struct wm97xx *, int cmd); ++ int (*acc_enable) (struct wm97xx *, int enable); ++}; ++ ++ ++/* Machine specific and accelerated touch operations */ ++struct wm97xx_mach_ops { ++ ++ /* accelerated touch readback - coords are transmited on AC97 link */ ++ int acc_enabled; ++ void (*acc_pen_up) (struct wm97xx *); ++ int (*acc_pen_down) (struct wm97xx *); ++ int (*acc_startup) (struct wm97xx *); ++ void (*acc_shutdown) (struct wm97xx *); ++ ++ /* pre and post sample - can be used to minimise any analog noise */ ++ void (*pre_sample) (int); /* function to run before sampling */ ++ void (*post_sample) (int); /* function to run after sampling */ ++}; ++ ++struct wm97xx { ++ u16 dig[3], id, gpio[6], misc; /* Cached codec registers */ ++ u16 dig_save[3]; /* saved during aux reading */ ++ struct wm97xx_codec_drv *codec; /* attached codec driver*/ ++ struct input_dev* input_dev; /* touchscreen input device */ ++ ac97_t *ac97; /* ALSA codec access */ ++ struct device *dev; /* ALSA device */ ++ struct device *battery_dev; ++ struct device *touch_dev; ++ struct wm97xx_mach_ops *mach_ops; ++ struct mutex codec_mutex; ++ struct completion ts_init; ++ struct completion ts_exit; ++ struct task_struct *ts_task; ++ unsigned int pen_irq; /* Pen IRQ number in use */ ++ wait_queue_head_t pen_irq_wait; /* Pen IRQ wait queue */ ++ struct workqueue_struct *pen_irq_workq; ++ struct work_struct pen_event_work; ++ u16 acc_slot; /* AC97 slot used for acc touch data */ ++ u16 acc_rate; /* acc touch data rate */ ++ unsigned int ts_use_count; ++ unsigned pen_is_down:1; /* Pen is down */ ++ unsigned aux_waiting:1; /* aux measurement waiting */ ++ unsigned pen_probably_down:1; /* used in polling mode */ ++}; ++ ++/* Codec GPIO access (not supported on WM9705) ++ * This can be used to set/get codec GPIO and Virtual GPIO status. ++ */ ++wm97xx_gpio_status_t wm97xx_get_gpio(struct wm97xx *wm, u32 gpio); ++void wm97xx_set_gpio(struct wm97xx *wm, u32 gpio, ++ wm97xx_gpio_status_t status); ++void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio, ++ wm97xx_gpio_dir_t dir, ++ wm97xx_gpio_pol_t pol, ++ wm97xx_gpio_sticky_t sticky, ++ wm97xx_gpio_wake_t wake); ++ ++/* codec AC97 IO access */ ++int wm97xx_reg_read(struct wm97xx *wm, u16 reg); ++void wm97xx_reg_write(struct wm97xx *wm, u16 reg, u16 val); ++ ++/* aux adc readback */ ++int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel); ++ ++/* machine ops */ ++int wm97xx_register_mach_ops(struct wm97xx *, struct wm97xx_mach_ops *); ++void wm97xx_unregister_mach_ops(struct wm97xx *); ++ ++extern struct bus_type wm97xx_bus_type; ++#endif +Index: linux-2.6.17/drivers/input/touchscreen/Kconfig +=================================================================== +--- linux-2.6.17.orig/drivers/input/touchscreen/Kconfig 2006-09-19 20:35:35.060495500 +0200 ++++ linux-2.6.17/drivers/input/touchscreen/Kconfig 2006-09-19 20:36:47.965051750 +0200 +@@ -121,4 +121,57 @@ config TOUCHSCREEN_TSC2101 + To compile this driver as a module, choose M here: the + module will be called ads7846_ts. + ++config TOUCHSCREEN_WM97XX ++ tristate "Support for WM97xx AC97 touchscreen controllers" ++ depends SND_AC97_BUS ++ ++choice ++ prompt "WM97xx codec type" ++ ++config TOUCHSCREEN_WM9705 ++ bool "WM9705 Touchscreen interface support" ++ depends on TOUCHSCREEN_WM97XX ++ help ++ Say Y here if you have the wm9705 touchscreen. ++ ++ If unsure, say N. ++ ++ To compile this driver as a module, choose M here: the ++ module will be called wm9705. ++ ++config TOUCHSCREEN_WM9712 ++ bool "WM9712 Touchscreen interface support" ++ depends on TOUCHSCREEN_WM97XX ++ help ++ Say Y here if you have the wm9712 touchscreen. ++ ++ If unsure, say N. ++ ++ To compile this driver as a module, choose M here: the ++ module will be called wm9712. ++ ++config TOUCHSCREEN_WM9713 ++ bool "WM9713 Touchscreen interface support" ++ depends on TOUCHSCREEN_WM97XX ++ help ++ Say Y here if you have the wm9713 touchscreen. ++ ++ If unsure, say N. ++ ++ To compile this driver as a module, choose M here: the ++ module will be called wm9713. ++ ++endchoice ++ ++config TOUCHSCREEN_WM97XX_PXA ++ tristate "WM97xx PXA accelerated touch" ++ depends on TOUCHSCREEN_WM97XX && ARCH_PXA ++ help ++ Say Y here for continuous mode touch on the PXA ++ ++ If unsure, say N ++ ++ To compile this driver as a module, choose M here: the ++ module will be called pxa-wm97xx ++ + endif +Index: linux-2.6.17/drivers/input/touchscreen/Makefile +=================================================================== +--- linux-2.6.17.orig/drivers/input/touchscreen/Makefile 2006-09-19 20:35:35.072496250 +0200 ++++ linux-2.6.17/drivers/input/touchscreen/Makefile 2006-09-19 20:37:40.540337500 +0200 +@@ -4,6 +4,8 @@ + + # Each configuration option enables a list of files. + ++wm97xx-ts-objs := wm97xx-core.o ++ + obj-$(CONFIG_TOUCHSCREEN_ADS7846) += ads7846.o + obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o + obj-$(CONFIG_TOUCHSCREEN_CORGI) += corgi_ts.o +@@ -13,3 +15,16 @@ obj-$(CONFIG_TOUCHSCREEN_MTOUCH) += mtou + obj-$(CONFIG_TOUCHSCREEN_MK712) += mk712.o + obj-$(CONFIG_TOUCHSCREEN_HP600) += hp680_ts_input.o + obj-$(CONFIG_TOUCHSCREEN_TSC2101) += tsc2101_ts.o ++obj-$(CONFIG_TOUCHSCREEN_WM97XX) += wm97xx-ts.o ++obj-$(CONFIG_TOUCHSCREEN_WM97XX_PXA) += pxa-wm97xx.o ++ ++ifeq ($(CONFIG_TOUCHSCREEN_WM9713),y) ++wm97xx-ts-objs += wm9713.o ++endif ++ ++ifeq ($(CONFIG_TOUCHSCREEN_WM9712),y) ++wm97xx-ts-objs += wm9712.o ++endif ++ifeq ($(CONFIG_TOUCHSCREEN_WM9705),y) ++wm97xx-ts-objs += wm9705.o ++endif +Index: linux-2.6.17/drivers/input/touchscreen/pxa-wm97xx.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.17/drivers/input/touchscreen/pxa-wm97xx.c 2006-09-19 20:36:47.965051750 +0200 +@@ -0,0 +1,289 @@ ++/* ++ * pxa-wm97xx.c -- pxa-wm97xx Continuous Touch screen driver for ++ * Wolfson WM97xx AC97 Codecs. ++ * ++ * Copyright 2004 Wolfson Microelectronics PLC. ++ * Author: Liam Girdwood ++ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com ++ * Parts Copyright : Ian Molton <spyro@f2s.com> ++ * Andrew Zabolotny <zap@homelink.ru> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * Notes: ++ * This is a wm97xx extended touch driver to capture touch ++ * data in a continuous manner on the Intel XScale archictecture ++ * ++ * Features: ++ * - codecs supported:- WM9705, WM9712, WM9713 ++ * - processors supported:- Intel XScale PXA25x, PXA26x, PXA27x ++ * ++ * Revision history ++ * 18th Aug 2004 Initial version. ++ * 26th Jul 2005 Improved continous read back and added FIFO flushing. ++ * 06th Sep 2005 Mike Arthur <linux@wolfsonmicro.com> ++ * Moved to using the wm97xx bus ++ * ++ */ ++ ++#include <linux/module.h> ++#include <linux/moduleparam.h> ++#include <linux/version.h> ++#include <linux/kernel.h> ++#include <linux/init.h> ++#include <linux/delay.h> ++#include <linux/irq.h> ++#include <linux/wm97xx.h> ++#include <asm/io.h> ++#include <asm/arch/pxa-regs.h> ++ ++#define VERSION "0.13" ++ ++struct continuous { ++ u16 id; /* codec id */ ++ u8 code; /* continuous code */ ++ u8 reads; /* number of coord reads per read cycle */ ++ u32 speed; /* number of coords per second */ ++}; ++ ++#define WM_READS(sp) ((sp / HZ) + 1) ++ ++static const struct continuous cinfo[] = { ++ {WM9705_ID2, 0, WM_READS(94), 94}, ++ {WM9705_ID2, 1, WM_READS(188), 188}, ++ {WM9705_ID2, 2, WM_READS(375), 375}, ++ {WM9705_ID2, 3, WM_READS(750), 750}, ++ {WM9712_ID2, 0, WM_READS(94), 94}, ++ {WM9712_ID2, 1, WM_READS(188), 188}, ++ {WM9712_ID2, 2, WM_READS(375), 375}, ++ {WM9712_ID2, 3, WM_READS(750), 750}, ++ {WM9713_ID2, 0, WM_READS(94), 94}, ++ {WM9713_ID2, 1, WM_READS(120), 120}, ++ {WM9713_ID2, 2, WM_READS(154), 154}, ++ {WM9713_ID2, 3, WM_READS(188), 188}, ++}; ++ ++/* continuous speed index */ ++static int sp_idx = 0; ++static u16 last = 0, tries = 0; ++ ++/* ++ * Pen sampling frequency (Hz) in continuous mode. ++ */ ++static int cont_rate = 200; ++module_param(cont_rate, int, 0); ++MODULE_PARM_DESC(cont_rate, "Sampling rate in continuous mode (Hz)"); ++ ++/* ++ * Pen down detection. ++ * ++ * This driver can either poll or use an interrupt to indicate a pen down ++ * event. If the irq request fails then it will fall back to polling mode. ++ */ ++static int pen_int = 1; ++module_param(pen_int, int, 0); ++MODULE_PARM_DESC(pen_int, "Pen down detection (1 = interrupt, 0 = polling)"); ++ ++/* ++ * Pressure readback. ++ * ++ * Set to 1 to read back pen down pressure ++ */ ++static int pressure = 0; ++module_param(pressure, int, 0); ++MODULE_PARM_DESC(pressure, "Pressure readback (1 = pressure, 0 = no pressure)"); ++ ++/* ++ * AC97 touch data slot. ++ * ++ * Touch screen readback data ac97 slot ++ */ ++static int ac97_touch_slot = 5; ++module_param(ac97_touch_slot, int, 0); ++MODULE_PARM_DESC(ac97_touch_slot, "Touch screen data slot AC97 number"); ++ ++ ++/* flush AC97 slot 5 FIFO on pxa machines */ ++#ifdef CONFIG_PXA27x ++void wm97xx_acc_pen_up (struct wm97xx* wm) ++{ ++ set_current_state(TASK_INTERRUPTIBLE); ++ schedule_timeout(1); ++ ++ while (MISR & (1 << 2)) ++ MODR; ++} ++#else ++void wm97xx_acc_pen_up (struct wm97xx* wm) ++{ ++ int count = 16; ++ set_current_state(TASK_INTERRUPTIBLE); ++ schedule_timeout(1); ++ ++ while (count < 16) { ++ MODR; ++ count--; ++ } ++} ++#endif ++ ++int wm97xx_acc_pen_down (struct wm97xx* wm) ++{ ++ u16 x, y, p = 0x100 | WM97XX_ADCSEL_PRES; ++ int reads = 0; ++ ++ /* data is never immediately available after pen down irq */ ++ set_current_state(TASK_INTERRUPTIBLE); ++ schedule_timeout(1); ++ ++ if (tries > 5){ ++ tries = 0; ++ return RC_PENUP; ++ } ++ ++ x = MODR; ++ if (x == last) { ++ tries++; ++ return RC_AGAIN; ++ } ++ last = x; ++ do { ++ if (reads) ++ x= MODR; ++ y= MODR; ++ if (pressure) ++ p = MODR; ++ ++ /* are samples valid */ ++ if ((x & 0x7000) != WM97XX_ADCSEL_X || ++ (y & 0x7000) != WM97XX_ADCSEL_Y || ++ (p & 0x7000) != WM97XX_ADCSEL_PRES) ++ goto up; ++ ++ /* coordinate is good */ ++ tries = 0; ++ //printk("x %x y %x p %x\n", x,y,p); ++ input_report_abs (wm->input_dev, ABS_X, x & 0xfff); ++ input_report_abs (wm->input_dev, ABS_Y, y & 0xfff); ++ input_report_abs (wm->input_dev, ABS_PRESSURE, p & 0xfff); ++ input_sync (wm->input_dev); ++ reads++; ++ } while (reads < cinfo[sp_idx].reads); ++up: ++ return RC_PENDOWN | RC_AGAIN; ++} ++ ++int wm97xx_acc_startup(struct wm97xx* wm) ++{ ++ int idx = 0; ++ ++ /* check we have a codec */ ++ if (wm->ac97 == NULL) ++ return -ENODEV; ++ ++ /* Go you big red fire engine */ ++ for (idx = 0; idx < ARRAY_SIZE(cinfo); idx++) { ++ if (wm->id != cinfo[idx].id) ++ continue; ++ sp_idx = idx; ++ if (cont_rate <= cinfo[idx].speed) ++ break; ++ } ++ wm->acc_rate = cinfo[sp_idx].code; ++ wm->acc_slot = ac97_touch_slot; ++ printk(KERN_INFO "pxa2xx accelerated touchscreen driver, %d samples (sec)\n", ++ cinfo[sp_idx].speed); ++ ++ /* codec specific irq config */ ++ if (pen_int) { ++ switch (wm->id) { ++ case WM9705_ID2: ++ wm->pen_irq = IRQ_GPIO(4); ++ set_irq_type(IRQ_GPIO(4), IRQT_BOTHEDGE); ++ break; ++ case WM9712_ID2: ++ case WM9713_ID2: ++ /* enable pen down interrupt */ ++ /* use PEN_DOWN GPIO 13 to assert IRQ on GPIO line 2 */ ++ wm->pen_irq = MAINSTONE_AC97_IRQ; ++ wm97xx_config_gpio(wm, WM97XX_GPIO_13, WM97XX_GPIO_IN, ++ WM97XX_GPIO_POL_HIGH, WM97XX_GPIO_STICKY, WM97XX_GPIO_WAKE); ++ wm97xx_config_gpio(wm, WM97XX_GPIO_2, WM97XX_GPIO_OUT, ++ WM97XX_GPIO_POL_HIGH, WM97XX_GPIO_NOTSTICKY, WM97XX_GPIO_NOWAKE); ++ break; ++ default: ++ printk(KERN_WARNING "pen down irq not supported on this device\n"); ++ pen_int = 0; ++ break; ++ } ++ } ++ ++ return 0; ++} ++ ++void wm97xx_acc_shutdown(struct wm97xx* wm) ++{ ++ /* codec specific deconfig */ ++ if (pen_int) { ++ switch (wm->id & 0xffff) { ++ case WM9705_ID2: ++ wm->pen_irq = 0; ++ break; ++ case WM9712_ID2: ++ case WM9713_ID2: ++ /* disable interrupt */ ++ wm->pen_irq = 0; ++ break; ++ } ++ } ++} ++ ++static struct wm97xx_mach_ops pxa_mach_ops = { ++ .acc_enabled = 1, ++ .acc_pen_up = wm97xx_acc_pen_up, ++ .acc_pen_down = wm97xx_acc_pen_down, ++ .acc_startup = wm97xx_acc_startup, ++ .acc_shutdown = wm97xx_acc_shutdown, ++}; ++ ++int pxa_wm97xx_probe(struct device *dev) ++{ ++ struct wm97xx *wm = dev->driver_data; ++ return wm97xx_register_mach_ops (wm, &pxa_mach_ops); ++} ++ ++int pxa_wm97xx_remove(struct device *dev) ++{ ++ struct wm97xx *wm = dev->driver_data; ++ wm97xx_unregister_mach_ops (wm); ++ return 0; ++} ++ ++static struct device_driver pxa_wm97xx_driver = { ++ .name = "wm97xx-touchscreen", ++ .bus = &wm97xx_bus_type, ++ .owner = THIS_MODULE, ++ .probe = pxa_wm97xx_probe, ++ .remove = pxa_wm97xx_remove ++}; ++ ++static int __init pxa_wm97xx_init(void) ++{ ++ return driver_register(&pxa_wm97xx_driver); ++} ++ ++static void __exit pxa_wm97xx_exit(void) ++{ ++ driver_unregister(&pxa_wm97xx_driver); ++} ++ ++module_init(pxa_wm97xx_init); ++module_exit(pxa_wm97xx_exit); ++ ++/* Module information */ ++MODULE_AUTHOR("Liam Girdwood <liam.girdwood@wolfsonmicro.com>"); ++MODULE_DESCRIPTION("wm97xx continuous touch driver for pxa2xx"); ++MODULE_LICENSE("GPL"); +Index: linux-2.6.17/drivers/input/touchscreen/wm9705.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.17/drivers/input/touchscreen/wm9705.c 2006-09-19 20:36:47.969052000 +0200 +@@ -0,0 +1,360 @@ ++/* ++ * wm9705.c -- Codec driver for Wolfson WM9705 AC97 Codec. ++ * ++ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC. ++ * Author: Liam Girdwood ++ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com ++ * Parts Copyright : Ian Molton <spyro@f2s.com> ++ * Andrew Zabolotny <zap@homelink.ru> ++ * Russell King <rmk@arm.linux.org.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * Revision history ++ * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com> ++ * Added pre and post sample calls. ++ * ++ */ ++ ++#include <linux/module.h> ++#include <linux/moduleparam.h> ++#include <linux/version.h> ++#include <linux/kernel.h> ++#include <linux/input.h> ++#include <linux/delay.h> ++#include <linux/bitops.h> ++#include <linux/wm97xx.h> ++ ++#define TS_NAME "wm97xx" ++#define WM9705_VERSION "0.62" ++#define DEFAULT_PRESSURE 0xb0c0 ++ ++/* ++ * Debug ++ */ ++#if 0 ++#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg) ++#else ++#define dbg(format, arg...) ++#endif ++#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg) ++#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg) ++#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg) ++ ++/* ++ * Module parameters ++ */ ++ ++/* ++ * Set current used for pressure measurement. ++ * ++ * Set pil = 2 to use 400uA ++ * pil = 1 to use 200uA and ++ * pil = 0 to disable pressure measurement. ++ * ++ * This is used to increase the range of values returned by the adc ++ * when measureing touchpanel pressure. ++ */ ++static int pil = 0; ++module_param(pil, int, 0); ++MODULE_PARM_DESC(pil, "Set current used for pressure measurement."); ++ ++/* ++ * Set threshold for pressure measurement. ++ * ++ * Pen down pressure below threshold is ignored. ++ */ ++static int pressure = DEFAULT_PRESSURE & 0xfff; ++module_param(pressure, int, 0); ++MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement."); ++ ++/* ++ * Set adc sample delay. ++ * ++ * For accurate touchpanel measurements, some settling time may be ++ * required between the switch matrix applying a voltage across the ++ * touchpanel plate and the ADC sampling the signal. ++ * ++ * This delay can be set by setting delay = n, where n is the array ++ * position of the delay in the array delay_table below. ++ * Long delays > 1ms are supported for completeness, but are not ++ * recommended. ++ */ ++static int delay = 4; ++module_param(delay, int, 0); ++MODULE_PARM_DESC(delay, "Set adc sample delay."); ++ ++/* ++ * Pen detect comparator threshold. ++ * ++ * 0 to Vmid in 15 steps, 0 = use zero power comparator with Vmid threshold ++ * i.e. 1 = Vmid/15 threshold ++ * 15 = Vmid/1 threshold ++ * ++ * Adjust this value if you are having problems with pen detect not ++ * detecting any down events. ++ */ ++static int pdd = 8; ++module_param(pdd, int, 0); ++MODULE_PARM_DESC(pdd, "Set pen detect comparator threshold"); ++ ++/* ++ * Set adc mask function. ++ * ++ * Sources of glitch noise, such as signals driving an LCD display, may feed ++ * through to the touch screen plates and affect measurement accuracy. In ++ * order to minimise this, a signal may be applied to the MASK pin to delay or ++ * synchronise the sampling. ++ * ++ * 0 = No delay or sync ++ * 1 = High on pin stops conversions ++ * 2 = Edge triggered, edge on pin delays conversion by delay param (above) ++ * 3 = Edge triggered, edge on pin starts conversion after delay param ++ */ ++static int mask = 0; ++module_param(mask, int, 0); ++MODULE_PARM_DESC(mask, "Set adc mask function."); ++ ++/* ++ * ADC sample delay times in uS ++ */ ++static const int delay_table[] = { ++ 21, // 1 AC97 Link frames ++ 42, // 2 ++ 84, // 4 ++ 167, // 8 ++ 333, // 16 ++ 667, // 32 ++ 1000, // 48 ++ 1333, // 64 ++ 2000, // 96 ++ 2667, // 128 ++ 3333, // 160 ++ 4000, // 192 ++ 4667, // 224 ++ 5333, // 256 ++ 6000, // 288 ++ 0 // No delay, switch matrix always on ++}; ++ ++/* ++ * Delay after issuing a POLL command. ++ * ++ * The delay is 3 AC97 link frames + the touchpanel settling delay ++ */ ++static inline void poll_delay(int d) ++{ ++ udelay (3 * AC97_LINK_FRAME + delay_table [d]); ++} ++ ++/* ++ * set up the physical settings of the WM9705 ++ */ ++static void init_wm9705_phy(struct wm97xx* wm) ++{ ++ u16 dig1 = 0, dig2 = WM97XX_RPR; ++ ++ /* ++ * mute VIDEO and AUX as they share X and Y touchscreen ++ * inputs on the WM9705 ++ */ ++ wm97xx_reg_write(wm, AC97_AUX, 0x8000); ++ wm97xx_reg_write(wm, AC97_VIDEO, 0x8000); ++ ++ /* touchpanel pressure current*/ ++ if (pil == 2) { ++ dig2 |= WM9705_PIL; ++ dbg("setting pressure measurement current to 400uA."); ++ } else if (pil) ++ dbg("setting pressure measurement current to 200uA."); ++ if(!pil) ++ pressure = 0; ++ ++ /* polling mode sample settling delay */ ++ if (delay!=4) { ++ if (delay < 0 || delay > 15) { ++ dbg("supplied delay out of range."); ++ delay = 4; ++ } ++ } ++ dig1 &= 0xff0f; ++ dig1 |= WM97XX_DELAY(delay); ++ dbg("setting adc sample delay to %d u Secs.", delay_table[delay]); ++ ++ /* WM9705 pdd */ ++ dig2 |= (pdd & 0x000f); ++ dbg("setting pdd to Vmid/%d", 1 - (pdd & 0x000f)); ++ ++ /* mask */ ++ dig2 |= ((mask & 0x3) << 4); ++ ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); ++} ++ ++static int wm9705_digitiser_ioctl(struct wm97xx* wm, int cmd) ++{ ++ switch(cmd) { ++ case WM97XX_DIG_START: ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig[2] | WM97XX_PRP_DET_DIG); ++ wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */ ++ break; ++ case WM97XX_DIG_STOP: ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig[2] & ~WM97XX_PRP_DET_DIG); ++ break; ++ case WM97XX_AUX_PREPARE: ++ memcpy(wm->dig_save, wm->dig, sizeof(wm->dig)); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, 0); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, WM97XX_PRP_DET_DIG); ++ break; ++ case WM97XX_DIG_RESTORE: ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, wm->dig_save[1]); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig_save[2]); ++ break; ++ case WM97XX_PHY_INIT: ++ init_wm9705_phy(wm); ++ break; ++ default: ++ return -EINVAL; ++ } ++ return 0; ++} ++ ++static inline int is_pden (struct wm97xx* wm) ++{ ++ return wm->dig[2] & WM9705_PDEN; ++} ++ ++/* ++ * Read a sample from the WM9705 adc in polling mode. ++ */ ++static int wm9705_poll_sample (struct wm97xx* wm, int adcsel, int *sample) ++{ ++ int timeout = 5 * delay; ++ ++ if (!wm->pen_probably_down) { ++ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (!(data & WM97XX_PEN_DOWN)) ++ return RC_PENUP; ++ wm->pen_probably_down = 1; ++ } ++ ++ /* set up digitiser */ ++ if (adcsel & 0x8000) ++ adcsel = ((adcsel & 0x7fff) + 3) << 12; ++ ++ if (wm->mach_ops && wm->mach_ops->pre_sample) ++ wm->mach_ops->pre_sample(adcsel); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, adcsel | WM97XX_POLL | WM97XX_DELAY(delay)); ++ ++ /* wait 3 AC97 time slots + delay for conversion */ ++ poll_delay (delay); ++ ++ /* wait for POLL to go low */ ++ while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) && timeout) { ++ udelay(AC97_LINK_FRAME); ++ timeout--; ++ } ++ ++ if (timeout <= 0) { ++ /* If PDEN is set, we can get a timeout when pen goes up */ ++ if (is_pden(wm)) ++ wm->pen_probably_down = 0; ++ else ++ dbg ("adc sample timeout"); ++ return RC_PENUP; ++ } ++ ++ *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (wm->mach_ops && wm->mach_ops->post_sample) ++ wm->mach_ops->post_sample(adcsel); ++ ++ /* check we have correct sample */ ++ if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) { ++ dbg ("adc wrong sample, read %x got %x", adcsel, ++ *sample & WM97XX_ADCSEL_MASK); ++ return RC_PENUP; ++ } ++ ++ if (!(*sample & WM97XX_PEN_DOWN)) { ++ wm->pen_probably_down = 0; ++ return RC_PENUP; ++ } ++ ++ return RC_VALID; ++} ++ ++/* ++ * Sample the WM9705 touchscreen in polling mode ++ */ ++static int wm9705_poll_touch(struct wm97xx* wm, struct wm97xx_data *data) ++{ ++ int rc; ++ ++ if ((rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_X, &data->x)) != RC_VALID) ++ return rc; ++ if ((rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_Y, &data->y)) != RC_VALID) ++ return rc; ++ if (pil) { ++ if ((rc = wm9705_poll_sample(wm, WM97XX_ADCSEL_PRES, &data->p)) != RC_VALID) ++ return rc; ++ } else ++ data->p = DEFAULT_PRESSURE; ++ ++ return RC_VALID; ++} ++ ++/* ++ * Enable WM9705 continuous mode, i.e. touch data is streamed across an AC97 slot ++ */ ++static int wm9705_acc_enable (struct wm97xx* wm, int enable) ++{ ++ u16 dig1, dig2; ++ int ret = 0; ++ ++ dig1 = wm->dig[1]; ++ dig2 = wm->dig[2]; ++ ++ if (enable) { ++ /* continous mode */ ++ if (wm->mach_ops->acc_startup && (ret = wm->mach_ops->acc_startup(wm)) < 0) ++ return ret; ++ dig1 &= ~(WM97XX_CM_RATE_MASK | WM97XX_ADCSEL_MASK | ++ WM97XX_DELAY_MASK | WM97XX_SLT_MASK); ++ dig1 |= WM97XX_CTC | WM97XX_COO | WM97XX_SLEN | ++ WM97XX_DELAY (delay) | ++ WM97XX_SLT (wm->acc_slot) | ++ WM97XX_RATE (wm->acc_rate); ++ if (pil) ++ dig1 |= WM97XX_ADCSEL_PRES; ++ dig2 |= WM9705_PDEN; ++ } else { ++ dig1 &= ~(WM97XX_CTC | WM97XX_COO | WM97XX_SLEN); ++ dig2 &= ~WM9705_PDEN; ++ if (wm->mach_ops->acc_shutdown) ++ wm->mach_ops->acc_shutdown(wm); ++ } ++ ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); ++ return ret; ++} ++ ++struct wm97xx_codec_drv wm97xx_codec = { ++ .id = WM9705_ID2, ++ .name = "wm9705", ++ .poll_sample = wm9705_poll_sample, ++ .poll_touch = wm9705_poll_touch, ++ .acc_enable = wm9705_acc_enable, ++ .digitiser_ioctl = wm9705_digitiser_ioctl, ++}; ++ ++EXPORT_SYMBOL_GPL(wm97xx_codec); ++ ++/* Module information */ ++MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); ++MODULE_DESCRIPTION("WM9705 Touch Screen Driver"); ++MODULE_LICENSE("GPL"); +Index: linux-2.6.17/drivers/input/touchscreen/wm9712.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.17/drivers/input/touchscreen/wm9712.c 2006-09-19 20:36:47.969052000 +0200 +@@ -0,0 +1,464 @@ ++/* ++ * wm9712.c -- Codec driver for Wolfson WM9712 AC97 Codecs. ++ * ++ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC. ++ * Author: Liam Girdwood ++ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com ++ * Parts Copyright : Ian Molton <spyro@f2s.com> ++ * Andrew Zabolotny <zap@homelink.ru> ++ * Russell King <rmk@arm.linux.org.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * Revision history ++ * 4th Jul 2005 Initial version. ++ * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com> ++ * Added pre and post sample calls. ++ * ++ */ ++ ++#include <linux/module.h> ++#include <linux/moduleparam.h> ++#include <linux/version.h> ++#include <linux/kernel.h> ++#include <linux/input.h> ++#include <linux/delay.h> ++#include <linux/bitops.h> ++#include <linux/wm97xx.h> ++ ++#define TS_NAME "wm97xx" ++#define WM9712_VERSION "0.61" ++#define DEFAULT_PRESSURE 0xb0c0 ++ ++/* ++ * Debug ++ */ ++#if 0 ++#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg) ++#else ++#define dbg(format, arg...) ++#endif ++#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg) ++#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg) ++#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg) ++ ++/* ++ * Module parameters ++ */ ++ ++/* ++ * Set internal pull up for pen detect. ++ * ++ * Pull up is in the range 1.02k (least sensitive) to 64k (most sensitive) ++ * i.e. pull up resistance = 64k Ohms / rpu. ++ * ++ * Adjust this value if you are having problems with pen detect not ++ * detecting any down event. ++ */ ++static int rpu = 3; ++module_param(rpu, int, 0); ++MODULE_PARM_DESC(rpu, "Set internal pull up resitor for pen detect."); ++ ++/* ++ * Set current used for pressure measurement. ++ * ++ * Set pil = 2 to use 400uA ++ * pil = 1 to use 200uA and ++ * pil = 0 to disable pressure measurement. ++ * ++ * This is used to increase the range of values returned by the adc ++ * when measureing touchpanel pressure. ++ */ ++static int pil = 0; ++module_param(pil, int, 0); ++MODULE_PARM_DESC(pil, "Set current used for pressure measurement."); ++ ++/* ++ * Set threshold for pressure measurement. ++ * ++ * Pen down pressure below threshold is ignored. ++ */ ++static int pressure = DEFAULT_PRESSURE & 0xfff; ++module_param(pressure, int, 0); ++MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement."); ++ ++/* ++ * Set adc sample delay. ++ * ++ * For accurate touchpanel measurements, some settling time may be ++ * required between the switch matrix applying a voltage across the ++ * touchpanel plate and the ADC sampling the signal. ++ * ++ * This delay can be set by setting delay = n, where n is the array ++ * position of the delay in the array delay_table below. ++ * Long delays > 1ms are supported for completeness, but are not ++ * recommended. ++ */ ++static int delay = 3; ++module_param(delay, int, 0); ++MODULE_PARM_DESC(delay, "Set adc sample delay."); ++ ++/* ++ * Set five_wire = 1 to use a 5 wire touchscreen. ++ * ++ * NOTE: Five wire mode does not allow for readback of pressure. ++ */ ++static int five_wire; ++module_param(five_wire, int, 0); ++MODULE_PARM_DESC(five_wire, "Set to '1' to use 5-wire touchscreen."); ++ ++/* ++ * Set adc mask function. ++ * ++ * Sources of glitch noise, such as signals driving an LCD display, may feed ++ * through to the touch screen plates and affect measurement accuracy. In ++ * order to minimise this, a signal may be applied to the MASK pin to delay or ++ * synchronise the sampling. ++ * ++ * 0 = No delay or sync ++ * 1 = High on pin stops conversions ++ * 2 = Edge triggered, edge on pin delays conversion by delay param (above) ++ * 3 = Edge triggered, edge on pin starts conversion after delay param ++ */ ++static int mask = 0; ++module_param(mask, int, 0); ++MODULE_PARM_DESC(mask, "Set adc mask function."); ++ ++/* ++ * Coordinate Polling Enable. ++ * ++ * Set to 1 to enable coordinate polling. e.g. x,y[,p] is sampled together ++ * for every poll. ++ */ ++static int coord = 0; ++module_param(coord, int, 0); ++MODULE_PARM_DESC(coord, "Polling coordinate mode"); ++ ++/* ++ * ADC sample delay times in uS ++ */ ++static const int delay_table[] = { ++ 21, // 1 AC97 Link frames ++ 42, // 2 ++ 84, // 4 ++ 167, // 8 ++ 333, // 16 ++ 667, // 32 ++ 1000, // 48 ++ 1333, // 64 ++ 2000, // 96 ++ 2667, // 128 ++ 3333, // 160 ++ 4000, // 192 ++ 4667, // 224 ++ 5333, // 256 ++ 6000, // 288 ++ 0 // No delay, switch matrix always on ++}; ++ ++/* ++ * Delay after issuing a POLL command. ++ * ++ * The delay is 3 AC97 link frames + the touchpanel settling delay ++ */ ++static inline void poll_delay(int d) ++{ ++ udelay (3 * AC97_LINK_FRAME + delay_table [d]); ++} ++ ++/* ++ * set up the physical settings of the WM9712 ++ */ ++static void init_wm9712_phy(struct wm97xx* wm) ++{ ++ u16 dig1 = 0; ++ u16 dig2 = WM97XX_RPR | WM9712_RPU(1); ++ ++ /* WM9712 rpu */ ++ if (rpu) { ++ dig2 &= 0xffc0; ++ dig2 |= WM9712_RPU(rpu); ++ dbg("setting pen detect pull-up to %d Ohms",64000 / rpu); ++ } ++ ++ /* touchpanel pressure current*/ ++ if (pil == 2) { ++ dig2 |= WM9712_PIL; ++ dbg("setting pressure measurement current to 400uA."); ++ } else if (pil) ++ dbg("setting pressure measurement current to 200uA."); ++ if(!pil) ++ pressure = 0; ++ ++ /* WM9712 five wire */ ++ if (five_wire) { ++ dig2 |= WM9712_45W; ++ dbg("setting 5-wire touchscreen mode."); ++ } ++ ++ /* polling mode sample settling delay */ ++ if (delay < 0 || delay > 15) { ++ dbg("supplied delay out of range."); ++ delay = 4; ++ } ++ dig1 &= 0xff0f; ++ dig1 |= WM97XX_DELAY(delay); ++ dbg("setting adc sample delay to %d u Secs.", delay_table[delay]); ++ ++ /* mask */ ++ dig2 |= ((mask & 0x3) << 6); ++ if (mask) { ++ u16 reg; ++ /* Set GPIO4 as Mask Pin*/ ++ reg = wm97xx_reg_read(wm, AC97_MISC_AFE); ++ wm97xx_reg_write(wm, AC97_MISC_AFE, reg | WM97XX_GPIO_4); ++ reg = wm97xx_reg_read(wm, AC97_GPIO_CFG); ++ wm97xx_reg_write(wm, AC97_GPIO_CFG, reg | WM97XX_GPIO_4); ++ } ++ ++ /* wait - coord mode */ ++ if(coord) ++ dig2 |= WM9712_WAIT; ++ ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); ++} ++ ++static int wm9712_digitiser_ioctl(struct wm97xx* wm, int cmd) ++{ ++ u16 dig2 = wm->dig[2]; ++ ++ switch(cmd) { ++ case WM97XX_DIG_START: ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2 | WM97XX_PRP_DET_DIG); ++ wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */ ++ break; ++ case WM97XX_DIG_STOP: ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2 & ~WM97XX_PRP_DET_DIG); ++ break; ++ case WM97XX_AUX_PREPARE: ++ memcpy(wm->dig_save, wm->dig, sizeof(wm->dig)); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, 0); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, WM97XX_PRP_DET_DIG); ++ break; ++ case WM97XX_DIG_RESTORE: ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, wm->dig_save[1]); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, wm->dig_save[2]); ++ break; ++ case WM97XX_PHY_INIT: ++ init_wm9712_phy(wm); ++ break; ++ default: ++ return -EINVAL; ++ } ++ return 0; ++} ++ ++static inline int is_pden (struct wm97xx* wm) ++{ ++ return wm->dig[2] & WM9712_PDEN; ++} ++ ++/* ++ * Read a sample from the WM9712 adc in polling mode. ++ */ ++static int wm9712_poll_sample (struct wm97xx* wm, int adcsel, int *sample) ++{ ++ int timeout = 5 * delay; ++ ++ if (!wm->pen_probably_down) { ++ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (!(data & WM97XX_PEN_DOWN)) ++ return RC_PENUP; ++ wm->pen_probably_down = 1; ++ } ++ ++ /* set up digitiser */ ++ if (adcsel & 0x8000) ++ adcsel = ((adcsel & 0x7fff) + 3) << 12; ++ ++ if (wm->mach_ops && wm->mach_ops->pre_sample) ++ wm->mach_ops->pre_sample(adcsel); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, adcsel | WM97XX_POLL | WM97XX_DELAY(delay)); ++ ++ /* wait 3 AC97 time slots + delay for conversion */ ++ poll_delay (delay); ++ ++ /* wait for POLL to go low */ ++ while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) && timeout) { ++ udelay(AC97_LINK_FRAME); ++ timeout--; ++ } ++ ++ if (timeout <= 0) { ++ /* If PDEN is set, we can get a timeout when pen goes up */ ++ if (is_pden(wm)) ++ wm->pen_probably_down = 0; ++ else ++ dbg ("adc sample timeout"); ++ return RC_PENUP; ++ } ++ ++ *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (wm->mach_ops && wm->mach_ops->post_sample) ++ wm->mach_ops->post_sample(adcsel); ++ ++ /* check we have correct sample */ ++ if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) { ++ dbg ("adc wrong sample, read %x got %x", adcsel, ++ *sample & WM97XX_ADCSEL_MASK); ++ return RC_PENUP; ++ } ++ ++ if (!(*sample & WM97XX_PEN_DOWN)) { ++ wm->pen_probably_down = 0; ++ return RC_PENUP; ++ } ++ ++ return RC_VALID; ++} ++ ++/* ++ * Read a coord from the WM9712 adc in polling mode. ++ */ ++static int wm9712_poll_coord (struct wm97xx* wm, struct wm97xx_data *data) ++{ ++ int timeout = 5 * delay; ++ ++ if (!wm->pen_probably_down) { ++ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (!(data & WM97XX_PEN_DOWN)) ++ return RC_PENUP; ++ wm->pen_probably_down = 1; ++ } ++ ++ /* set up digitiser */ ++ if (wm->mach_ops && wm->mach_ops->pre_sample) ++ wm->mach_ops->pre_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); ++ ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, ++ WM97XX_COO | WM97XX_POLL | WM97XX_DELAY(delay)); ++ ++ /* wait 3 AC97 time slots + delay for conversion and read x */ ++ poll_delay(delay); ++ data->x = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ /* wait for POLL to go low */ ++ while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL) && timeout) { ++ udelay(AC97_LINK_FRAME); ++ timeout--; ++ } ++ ++ if (timeout <= 0) { ++ /* If PDEN is set, we can get a timeout when pen goes up */ ++ if (is_pden(wm)) ++ wm->pen_probably_down = 0; ++ else ++ dbg ("adc sample timeout"); ++ return RC_PENUP; ++ } ++ ++ /* read back y data */ ++ data->y = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (pil) ++ data->p = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ else ++ data->p = DEFAULT_PRESSURE; ++ ++ if (wm->mach_ops && wm->mach_ops->post_sample) ++ wm->mach_ops->post_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); ++ ++ /* check we have correct sample */ ++ if (!(data->x & WM97XX_ADCSEL_X) || !(data->y & WM97XX_ADCSEL_Y)) ++ goto err; ++ if(pil && !(data->p & WM97XX_ADCSEL_PRES)) ++ goto err; ++ ++ if (!(data->x & WM97XX_PEN_DOWN)) { ++ wm->pen_probably_down = 0; ++ return RC_PENUP; ++ } ++ return RC_VALID; ++err: ++ return RC_PENUP; ++} ++ ++/* ++ * Sample the WM9712 touchscreen in polling mode ++ */ ++static int wm9712_poll_touch(struct wm97xx* wm, struct wm97xx_data *data) ++{ ++ int rc; ++ ++ if(coord) { ++ if((rc = wm9712_poll_coord(wm, data)) != RC_VALID) ++ return rc; ++ } else { ++ if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_X, &data->x)) != RC_VALID) ++ return rc; ++ ++ if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_Y, &data->y)) != RC_VALID) ++ return rc; ++ ++ if (pil && !five_wire) { ++ if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_PRES, &data->p)) != RC_VALID) ++ return rc; ++ } else ++ data->p = DEFAULT_PRESSURE; ++ } ++ return RC_VALID; ++} ++ ++/* ++ * Enable WM9712 continuous mode, i.e. touch data is streamed across an AC97 slot ++ */ ++static int wm9712_acc_enable (struct wm97xx* wm, int enable) ++{ ++ u16 dig1, dig2; ++ int ret = 0; ++ ++ dig1 = wm->dig[1]; ++ dig2 = wm->dig[2]; ++ ++ if (enable) { ++ /* continous mode */ ++ if (wm->mach_ops->acc_startup && (ret = wm->mach_ops->acc_startup(wm)) < 0) ++ return ret; ++ dig1 &= ~(WM97XX_CM_RATE_MASK | WM97XX_ADCSEL_MASK | ++ WM97XX_DELAY_MASK | WM97XX_SLT_MASK); ++ dig1 |= WM97XX_CTC | WM97XX_COO | WM97XX_SLEN | ++ WM97XX_DELAY (delay) | ++ WM97XX_SLT (wm->acc_slot) | ++ WM97XX_RATE (wm->acc_rate); ++ if (pil) ++ dig1 |= WM97XX_ADCSEL_PRES; ++ dig2 |= WM9712_PDEN; ++ } else { ++ dig1 &= ~(WM97XX_CTC | WM97XX_COO | WM97XX_SLEN); ++ dig2 &= ~WM9712_PDEN; ++ if (wm->mach_ops->acc_shutdown) ++ wm->mach_ops->acc_shutdown(wm); ++ } ++ ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, dig1); ++ wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER2, dig2); ++ return 0; ++} ++ ++struct wm97xx_codec_drv wm97xx_codec = { ++ .id = WM9712_ID2, ++ .name = "wm9712", ++ .poll_sample = wm9712_poll_sample, ++ .poll_touch = wm9712_poll_touch, ++ .acc_enable = wm9712_acc_enable, ++ .digitiser_ioctl = wm9712_digitiser_ioctl, ++}; ++ ++EXPORT_SYMBOL_GPL(wm97xx_codec); ++ ++/* Module information */ ++MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); ++MODULE_DESCRIPTION("WM9712 Touch Screen Driver"); ++MODULE_LICENSE("GPL"); +Index: linux-2.6.17/drivers/input/touchscreen/wm9713.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.17/drivers/input/touchscreen/wm9713.c 2006-09-19 20:36:47.969052000 +0200 +@@ -0,0 +1,461 @@ ++/* ++ * wm9713.c -- Codec touch driver for Wolfson WM9713 AC97 Codec. ++ * ++ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC. ++ * Author: Liam Girdwood ++ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com ++ * Parts Copyright : Ian Molton <spyro@f2s.com> ++ * Andrew Zabolotny <zap@homelink.ru> ++ * Russell King <rmk@arm.linux.org.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * Revision history ++ * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com> ++ * Added pre and post sample calls. ++ * ++ */ ++ ++#include <linux/module.h> ++#include <linux/moduleparam.h> ++#include <linux/version.h> ++#include <linux/kernel.h> ++#include <linux/input.h> ++#include <linux/delay.h> ++#include <linux/bitops.h> ++#include <linux/wm97xx.h> ++ ++#define TS_NAME "wm97xx" ++#define WM9713_VERSION "0.53" ++#define DEFAULT_PRESSURE 0xb0c0 ++ ++/* ++ * Debug ++ */ ++#if 0 ++#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg) ++#else ++#define dbg(format, arg...) ++#endif ++#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg) ++#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg) ++#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg) ++ ++/* ++ * Module parameters ++ */ ++ ++/* ++ * Set internal pull up for pen detect. ++ * ++ * Pull up is in the range 1.02k (least sensitive) to 64k (most sensitive) ++ * i.e. pull up resistance = 64k Ohms / rpu. ++ * ++ * Adjust this value if you are having problems with pen detect not ++ * detecting any down event. ++ */ ++static int rpu = 1; ++module_param(rpu, int, 0); ++MODULE_PARM_DESC(rpu, "Set internal pull up resitor for pen detect."); ++ ++/* ++ * Set current used for pressure measurement. ++ * ++ * Set pil = 2 to use 400uA ++ * pil = 1 to use 200uA and ++ * pil = 0 to disable pressure measurement. ++ * ++ * This is used to increase the range of values returned by the adc ++ * when measureing touchpanel pressure. ++ */ ++static int pil = 0; ++module_param(pil, int, 0); ++MODULE_PARM_DESC(pil, "Set current used for pressure measurement."); ++ ++/* ++ * Set threshold for pressure measurement. ++ * ++ * Pen down pressure below threshold is ignored. ++ */ ++static int pressure = DEFAULT_PRESSURE & 0xfff; ++module_param(pressure, int, 0); ++MODULE_PARM_DESC(pressure, "Set threshold for pressure measurement."); ++ ++/* ++ * Set adc sample delay. ++ * ++ * For accurate touchpanel measurements, some settling time may be ++ * required between the switch matrix applying a voltage across the ++ * touchpanel plate and the ADC sampling the signal. ++ * ++ * This delay can be set by setting delay = n, where n is the array ++ * position of the delay in the array delay_table below. ++ * Long delays > 1ms are supported for completeness, but are not ++ * recommended. ++ */ ++static int delay = 4; ++module_param(delay, int, 0); ++MODULE_PARM_DESC(delay, "Set adc sample delay."); ++ ++/* ++ * Set adc mask function. ++ * ++ * Sources of glitch noise, such as signals driving an LCD display, may feed ++ * through to the touch screen plates and affect measurement accuracy. In ++ * order to minimise this, a signal may be applied to the MASK pin to delay or ++ * synchronise the sampling. ++ * ++ * 0 = No delay or sync ++ * 1 = High on pin stops conversions ++ * 2 = Edge triggered, edge on pin delays conversion by delay param (above) ++ * 3 = Edge triggered, edge on pin starts conversion after delay param ++ */ ++static int mask = 0; ++module_param(mask, int, 0); ++MODULE_PARM_DESC(mask, "Set adc mask function."); ++ ++/* ++ * Coordinate Polling Enable. ++ * ++ * Set to 1 to enable coordinate polling. e.g. x,y[,p] is sampled together ++ * for every poll. ++ */ ++static int coord = 1; ++module_param(coord, int, 0); ++MODULE_PARM_DESC(coord, "Polling coordinate mode"); ++ ++/* ++ * ADC sample delay times in uS ++ */ ++static const int delay_table[] = { ++ 21, // 1 AC97 Link frames ++ 42, // 2 ++ 84, // 4 ++ 167, // 8 ++ 333, // 16 ++ 667, // 32 ++ 1000, // 48 ++ 1333, // 64 ++ 2000, // 96 ++ 2667, // 128 ++ 3333, // 160 ++ 4000, // 192 ++ 4667, // 224 ++ 5333, // 256 ++ 6000, // 288 ++ 0 // No delay, switch matrix always on ++}; ++ ++/* ++ * Delay after issuing a POLL command. ++ * ++ * The delay is 3 AC97 link frames + the touchpanel settling delay ++ */ ++static inline void poll_delay(int d) ++{ ++ udelay (3 * AC97_LINK_FRAME + delay_table [d]); ++} ++ ++/* ++ * set up the physical settings of the WM9713 ++ */ ++static void init_wm9713_phy(struct wm97xx* wm) ++{ ++ u16 dig1 = 0, dig2, dig3; ++ ++ /* default values */ ++ dig2 = WM97XX_DELAY(4) | WM97XX_SLT(5); ++ dig3= WM9712_RPU(1); ++ ++ /* rpu */ ++ if (rpu) { ++ dig3 &= 0xffc0; ++ dig3 |= WM9712_RPU(rpu); ++ info("setting pen detect pull-up to %d Ohms",64000 / rpu); ++ } ++ ++ /* touchpanel pressure */ ++ if (pil == 2) { ++ dig3 |= WM9712_PIL; ++ info("setting pressure measurement current to 400uA."); ++ } else if (pil) ++ info ("setting pressure measurement current to 200uA."); ++ if(!pil) ++ pressure = 0; ++ ++ /* sample settling delay */ ++ if (delay < 0 || delay > 15) { ++ info ("supplied delay out of range."); ++ delay = 4; ++ info("setting adc sample delay to %d u Secs.", delay_table[delay]); ++ } ++ dig2 &= 0xff0f; ++ dig2 |= WM97XX_DELAY(delay); ++ ++ /* mask */ ++ dig3 |= ((mask & 0x3) << 4); ++ if(coord) ++ dig3 |= WM9713_WAIT; ++ ++ wm->misc = wm97xx_reg_read(wm, 0x5a); ++ ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG2, dig2); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, dig3); ++ wm97xx_reg_write(wm, AC97_GPIO_STICKY, 0x0); ++} ++ ++static int wm9713_digitiser_ioctl(struct wm97xx* wm, int cmd) ++{ ++ u16 val = 0; ++ ++ switch(cmd){ ++ case WM97XX_DIG_START: ++ val = wm97xx_reg_read(wm, AC97_EXTENDED_MID); ++ wm97xx_reg_write(wm, AC97_EXTENDED_MID, val & 0x7fff); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2] | WM97XX_PRP_DET_DIG); ++ wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); /* dummy read */ ++ break; ++ case WM97XX_DIG_STOP: ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2] & ~WM97XX_PRP_DET_DIG); ++ val = wm97xx_reg_read(wm, AC97_EXTENDED_MID); ++ wm97xx_reg_write(wm, AC97_EXTENDED_MID, val | 0x8000); ++ break; ++ case WM97XX_AUX_PREPARE: ++ memcpy(wm->dig_save, wm->dig, sizeof(wm->dig)); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, 0); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG2, 0); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, WM97XX_PRP_DET_DIG); ++ break; ++ case WM97XX_DIG_RESTORE: ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, wm->dig_save[0]); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG2, wm->dig_save[1]); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig_save[2]); ++ break; ++ case WM97XX_PHY_INIT: ++ init_wm9713_phy(wm); ++ break; ++ default: ++ return -EINVAL; ++ } ++ return 0; ++} ++ ++static inline int is_pden (struct wm97xx* wm) ++{ ++ return wm->dig[2] & WM9713_PDEN; ++} ++ ++/* ++ * Read a sample from the WM9713 adc in polling mode. ++ */ ++static int wm9713_poll_sample (struct wm97xx* wm, int adcsel, int *sample) ++{ ++ u16 dig1; ++ int timeout = 5 * delay; ++ ++ if (!wm->pen_probably_down) { ++ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (!(data & WM97XX_PEN_DOWN)) ++ return RC_PENUP; ++ wm->pen_probably_down = 1; ++ } ++ ++ /* set up digitiser */ ++ if (adcsel & 0x8000) ++ adcsel = 1 << ((adcsel & 0x7fff) + 3); ++ ++ dig1 = wm97xx_reg_read(wm, AC97_WM9713_DIG1); ++ dig1 &= ~WM9713_ADCSEL_MASK; ++ ++ if (wm->mach_ops && wm->mach_ops->pre_sample) ++ wm->mach_ops->pre_sample(adcsel); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1 | adcsel |WM9713_POLL); ++ ++ /* wait 3 AC97 time slots + delay for conversion */ ++ poll_delay(delay); ++ ++ /* wait for POLL to go low */ ++ while ((wm97xx_reg_read(wm, AC97_WM9713_DIG1) & WM9713_POLL) && timeout) { ++ udelay(AC97_LINK_FRAME); ++ timeout--; ++ } ++ ++ if (timeout <= 0) { ++ /* If PDEN is set, we can get a timeout when pen goes up */ ++ if (is_pden(wm)) ++ wm->pen_probably_down = 0; ++ else ++ dbg ("adc sample timeout"); ++ return RC_PENUP; ++ } ++ ++ *sample =wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (wm->mach_ops && wm->mach_ops->post_sample) ++ wm->mach_ops->post_sample(adcsel); ++ ++ /* check we have correct sample */ ++ if ((*sample & WM97XX_ADCSRC_MASK) != ffs(adcsel >> 1) << 12) { ++ dbg ("adc wrong sample, read %x got %x", adcsel, ++ *sample & WM97XX_ADCSRC_MASK); ++ return RC_PENUP; ++ } ++ ++ if (!(*sample & WM97XX_PEN_DOWN)) { ++ wm->pen_probably_down = 0; ++ return RC_PENUP; ++ } ++ ++ return RC_VALID; ++} ++ ++/* ++ * Read a coordinate from the WM9713 adc in polling mode. ++ */ ++static int wm9713_poll_coord (struct wm97xx* wm, struct wm97xx_data *data) ++{ ++ u16 dig1; ++ int timeout = 5 * delay; ++ ++ if (!wm->pen_probably_down) { ++ u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (!(data & WM97XX_PEN_DOWN)) ++ return RC_PENUP; ++ wm->pen_probably_down = 1; ++ } ++ ++ /* set up digitiser */ ++ dig1 = wm97xx_reg_read(wm, AC97_WM9713_DIG1); ++ dig1 &= ~WM9713_ADCSEL_MASK; ++ if(pil) ++ dig1 |= WM97XX_ADCSEL_PRES; ++ ++ if (wm->mach_ops && wm->mach_ops->pre_sample) ++ wm->mach_ops->pre_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1 | WM9713_POLL | WM9713_COO); ++ ++ /* wait 3 AC97 time slots + delay for conversion */ ++ poll_delay(delay); ++ data->x = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ /* wait for POLL to go low */ ++ while ((wm97xx_reg_read(wm, AC97_WM9713_DIG1) & WM9713_POLL) && timeout) { ++ udelay(AC97_LINK_FRAME); ++ timeout--; ++ } ++ ++ if (timeout <= 0) { ++ /* If PDEN is set, we can get a timeout when pen goes up */ ++ if (is_pden(wm)) ++ wm->pen_probably_down = 0; ++ else ++ dbg ("adc sample timeout"); ++ return RC_PENUP; ++ } ++ ++ /* read back data */ ++ data->y = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ if (pil) ++ data->p = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); ++ else ++ data->p = DEFAULT_PRESSURE; ++ ++ if (wm->mach_ops && wm->mach_ops->post_sample) ++ wm->mach_ops->post_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y); ++ ++ /* check we have correct sample */ ++ if (!(data->x & WM97XX_ADCSEL_X) || !(data->y & WM97XX_ADCSEL_Y)) ++ goto err; ++ if(pil && !(data->p & WM97XX_ADCSEL_PRES)) ++ goto err; ++ ++ if (!(data->x & WM97XX_PEN_DOWN)) { ++ wm->pen_probably_down = 0; ++ return RC_PENUP; ++ } ++ return RC_VALID; ++err: ++ return RC_PENUP; ++} ++ ++/* ++ * Sample the WM9713 touchscreen in polling mode ++ */ ++static int wm9713_poll_touch(struct wm97xx* wm, struct wm97xx_data *data) ++{ ++ int rc; ++ ++ if(coord) { ++ if((rc = wm9713_poll_coord(wm, data)) != RC_VALID) ++ return rc; ++ } else { ++ if ((rc = wm9713_poll_sample(wm, WM9713_ADCSEL_X, &data->x)) != RC_VALID) ++ return rc; ++ if ((rc = wm9713_poll_sample(wm, WM9713_ADCSEL_Y, &data->y)) != RC_VALID) ++ return rc; ++ if (pil) { ++ if ((rc = wm9713_poll_sample(wm, WM9713_ADCSEL_PRES, &data->p)) != RC_VALID) ++ return rc; ++ } else ++ data->p = DEFAULT_PRESSURE; ++ } ++ return RC_VALID; ++} ++ ++/* ++ * Enable WM9713 continuous mode, i.e. touch data is streamed across an AC97 slot ++ */ ++static int wm9713_acc_enable (struct wm97xx* wm, int enable) ++{ ++ u16 dig1, dig2, dig3; ++ int ret = 0; ++ ++ dig1 = wm->dig[0]; ++ dig2 = wm->dig[1]; ++ dig3 = wm->dig[2]; ++ ++ if (enable) { ++ /* continous mode */ ++ if (wm->mach_ops->acc_startup && ++ (ret = wm->mach_ops->acc_startup(wm)) < 0) ++ return ret; ++ ++ dig1 &= ~WM9713_ADCSEL_MASK; ++ dig1 |= WM9713_CTC | WM9713_COO | WM9713_ADCSEL_X | WM9713_ADCSEL_Y; ++ if (pil) ++ dig1 |= WM9713_ADCSEL_PRES; ++ dig2 &= ~(WM97XX_DELAY_MASK | WM97XX_SLT_MASK | WM97XX_CM_RATE_MASK); ++ dig2 |= WM97XX_SLEN | WM97XX_DELAY (delay) | ++ WM97XX_SLT (wm->acc_slot) | WM97XX_RATE (wm->acc_rate); ++ dig3 |= WM9713_PDEN; ++ } else { ++ dig1 &= ~(WM9713_CTC | WM9713_COO); ++ dig2 &= ~WM97XX_SLEN; ++ dig3 &= ~WM9713_PDEN; ++ if (wm->mach_ops->acc_shutdown) ++ wm->mach_ops->acc_shutdown(wm); ++ } ++ ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, dig1); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG2, dig2); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, dig3); ++ return ret; ++} ++ ++struct wm97xx_codec_drv wm97xx_codec = { ++ .id = WM9713_ID2, ++ .name = "wm9713", ++ .poll_sample = wm9713_poll_sample, ++ .poll_touch = wm9713_poll_touch, ++ .acc_enable = wm9713_acc_enable, ++ .digitiser_ioctl = wm9713_digitiser_ioctl, ++}; ++ ++EXPORT_SYMBOL_GPL(wm97xx_codec); ++ ++/* Module information */ ++MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); ++MODULE_DESCRIPTION("WM9713 Touch Screen Driver"); ++MODULE_LICENSE("GPL"); +Index: linux-2.6.17/drivers/input/touchscreen/wm97xx-core.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.17/drivers/input/touchscreen/wm97xx-core.c 2006-09-19 20:36:47.969052000 +0200 +@@ -0,0 +1,912 @@ ++/* ++ * wm97xx-core.c -- Touch screen driver core for Wolfson WM9705, WM9712 ++ * and WM9713 AC97 Codecs. ++ * ++ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC. ++ * Author: Liam Girdwood ++ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com ++ * Parts Copyright : Ian Molton <spyro@f2s.com> ++ * Andrew Zabolotny <zap@homelink.ru> ++ * Russell King <rmk@arm.linux.org.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * Notes: ++ * ++ * Features: ++ * - supports WM9705, WM9712, WM9713 ++ * - polling mode ++ * - continuous mode (arch-dependent) ++ * - adjustable rpu/dpp settings ++ * - adjustable pressure current ++ * - adjustable sample settle delay ++ * - 4 and 5 wire touchscreens (5 wire is WM9712 only) ++ * - pen down detection ++ * - battery monitor ++ * - sample AUX adc's ++ * - power management ++ * - codec GPIO ++ * - codec event notification ++ * Todo ++ * - Support for async sampling control for noisy LCD's. ++ * ++ * Revision history ++ * 7th May 2003 Initial version. ++ * 6th June 2003 Added non module support and AC97 registration. ++ * 18th June 2003 Added AUX adc sampling. ++ * 23rd June 2003 Did some minimal reformatting, fixed a couple of ++ * codec_mutexing bugs and noted a race to fix. ++ * 24th June 2003 Added power management and fixed race condition. ++ * 10th July 2003 Changed to a misc device. ++ * 31st July 2003 Moved TS_EVENT and TS_CAL to wm97xx.h ++ * 8th Aug 2003 Added option for read() calling wm97xx_sample_touch() ++ * because some ac97_read/ac_97_write call schedule() ++ * 7th Nov 2003 Added Input touch event interface, stanley.cai@intel.com ++ * 13th Nov 2003 Removed h3600 touch interface, added interrupt based ++ * pen down notification and implemented continous mode ++ * on XScale arch. ++ * 16th Nov 2003 Ian Molton <spyro@f2s.com> ++ * Modified so that it suits the new 2.6 driver model. ++ * 25th Jan 2004 Andrew Zabolotny <zap@homelink.ru> ++ * Implemented IRQ-driven pen down detection, implemented ++ * the private API meant to be exposed to platform-specific ++ * drivers, reorganized the driver so that it supports ++ * an arbitrary number of devices. ++ * 1st Feb 2004 Moved continuous mode handling to a separate ++ * architecture-dependent file. For now only PXA ++ * built-in AC97 controller is supported (pxa-ac97-wm97xx.c). ++ * 11th Feb 2004 Reduced CPU usage by keeping a cached copy of both ++ * digitizer registers instead of reading them every time. ++ * A reorganization of the whole code for better ++ * error handling. ++ * 17th Apr 2004 Added BMON support. ++ * 17th Nov 2004 Added codec GPIO, codec event handling (real and virtual ++ * GPIOs) and 2.6 power management. ++ * 29th Nov 2004 Added WM9713 support. ++ * 4th Jul 2005 Moved codec specific code out to seperate files. ++ * 6th Sep 2006 Mike Arthur <linux@wolfsonmicro.com> ++ * Added bus interface. ++ */ ++ ++#include <linux/module.h> ++#include <linux/moduleparam.h> ++#include <linux/version.h> ++#include <linux/kernel.h> ++#include <linux/init.h> ++#include <linux/delay.h> ++#include <linux/string.h> ++#include <linux/proc_fs.h> ++#include <linux/pm.h> ++#include <linux/interrupt.h> ++#include <linux/bitops.h> ++#include <linux/workqueue.h> ++#include <linux/device.h> ++#include <linux/wm97xx.h> ++#include <asm/uaccess.h> ++#include <asm/io.h> ++ ++#define TS_NAME "wm97xx" ++#define WM_CORE_VERSION "0.63" ++#define DEFAULT_PRESSURE 0xb0c0 ++ ++/* ++ * WM97xx - enable/disable AUX ADC sysfs ++ */ ++static int aux_sys = 1; ++module_param(aux_sys, int, 0); ++MODULE_PARM_DESC(aux_sys, "enable AUX ADC sysfs entries"); ++ ++/* ++ * WM97xx - enable/disable codec status sysfs ++ */ ++static int status_sys = 1; ++module_param(status_sys, int, 0); ++MODULE_PARM_DESC(status_sys, "enable codec status sysfs entries"); ++ ++/* ++ * Touchscreen absolute values ++ * ++ * These parameters are used to help the input layer discard out of ++ * range readings and reduce jitter etc. ++ * ++ * o min, max:- indicate the min and max values your touch screen returns ++ * o fuzz:- use a higher number to reduce jitter ++ * ++ * The default values correspond to Mainstone II in QVGA mode ++ * ++ * Please read ++ * Documentation/input/input-programming.txt for more details. ++ */ ++ ++static int abs_x[3] = {350,3900,5}; ++module_param_array(abs_x, int, NULL, 0); ++MODULE_PARM_DESC(abs_x, "Touchscreen absolute X min, max, fuzz"); ++ ++static int abs_y[3] = {320,3750,40}; ++module_param_array(abs_y, int, NULL, 0); ++MODULE_PARM_DESC(abs_y, "Touchscreen absolute Y min, max, fuzz"); ++ ++static int abs_p[3] = {0,150,4}; ++module_param_array(abs_p, int, NULL, 0); ++MODULE_PARM_DESC(abs_p, "Touchscreen absolute Pressure min, max, fuzz"); ++ ++/* ++ * Debug ++ */ ++#if 0 ++#define dbg(format, arg...) printk(KERN_DEBUG TS_NAME ": " format "\n" , ## arg) ++#else ++#define dbg(format, arg...) ++#endif ++#define err(format, arg...) printk(KERN_ERR TS_NAME ": " format "\n" , ## arg) ++#define info(format, arg...) printk(KERN_INFO TS_NAME ": " format "\n" , ## arg) ++#define warn(format, arg...) printk(KERN_WARNING TS_NAME ": " format "\n" , ## arg) ++ ++/* codec AC97 IO access */ ++int wm97xx_reg_read(struct wm97xx *wm, u16 reg) ++{ ++ if (wm->ac97) ++ return wm->ac97->bus->ops->read(wm->ac97, reg); ++ else ++ return -1; ++} ++ ++void wm97xx_reg_write(struct wm97xx *wm, u16 reg, u16 val) ++{ ++ /* cache digitiser registers */ ++ if(reg >= AC97_WM9713_DIG1 && reg <= AC97_WM9713_DIG3) ++ wm->dig[(reg - AC97_WM9713_DIG1) >> 1] = val; ++ ++ /* cache gpio regs */ ++ if(reg >= AC97_GPIO_CFG && reg <= AC97_MISC_AFE) ++ wm->gpio[(reg - AC97_GPIO_CFG) >> 1] = val; ++ ++ /* wm9713 irq reg */ ++ if(reg == 0x5a) ++ wm->misc = val; ++ ++ if (wm->ac97) ++ wm->ac97->bus->ops->write(wm->ac97, reg, val); ++} ++ ++ ++/** ++ * wm97xx_read_aux_adc - Read the aux adc. ++ * @wm: wm97xx device. ++ * @adcsel: codec ADC to be read ++ * ++ * Reads the selected AUX ADC. ++ */ ++ ++int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel) ++{ ++ int power_adc = 0, auxval; ++ u16 power = 0; ++ ++ /* get codec */ ++ mutex_lock(&wm->codec_mutex); ++ ++ /* When the touchscreen is not in use, we may have to power up the AUX ADC ++ * before we can use sample the AUX inputs-> ++ */ ++ if (wm->id == WM9713_ID2 && ++ (power = wm97xx_reg_read(wm, AC97_EXTENDED_MID)) & 0x8000) { ++ power_adc = 1; ++ wm97xx_reg_write(wm, AC97_EXTENDED_MID, power & 0x7fff); ++ } ++ ++ /* Prepare the codec for AUX reading */ ++ wm->codec->digitiser_ioctl(wm, WM97XX_AUX_PREPARE); ++ ++ /* Turn polling mode on to read AUX ADC */ ++ wm->pen_probably_down = 1; ++ wm->codec->poll_sample(wm, adcsel, &auxval); ++ ++ if (power_adc) ++ wm97xx_reg_write(wm, AC97_EXTENDED_MID, power | 0x8000); ++ ++ wm->codec->digitiser_ioctl(wm, WM97XX_DIG_RESTORE); ++ ++ wm->pen_probably_down = 0; ++ ++ mutex_unlock(&wm->codec_mutex); ++ return auxval & 0xfff; ++} ++ ++#define WM97XX_AUX_ATTR(name,input) \ ++static ssize_t name##_show(struct device *dev, struct device_attribute *attr, char *buf) \ ++{ \ ++ struct wm97xx *wm = (struct wm97xx*)dev->driver_data; \ ++ return sprintf(buf, "%d\n", wm97xx_read_aux_adc(wm, input)); \ ++} \ ++static DEVICE_ATTR(name, 0444, name##_show, NULL) ++ ++WM97XX_AUX_ATTR(aux1, WM97XX_AUX_ID1); ++WM97XX_AUX_ATTR(aux2, WM97XX_AUX_ID2); ++WM97XX_AUX_ATTR(aux3, WM97XX_AUX_ID3); ++WM97XX_AUX_ATTR(aux4, WM97XX_AUX_ID4); ++ ++#define WM97XX_STATUS_ATTR(name) \ ++static ssize_t name##_show(struct device *dev, struct device_attribute *attr, char *buf) \ ++{ \ ++ struct wm97xx *wm = (struct wm97xx*)dev->driver_data; \ ++ return sprintf(buf, "%d\n", wm97xx_reg_read(wm, AC97_GPIO_STATUS)); \ ++} \ ++static DEVICE_ATTR(name, 0444, name##_show, NULL) ++ ++WM97XX_STATUS_ATTR(gpio); ++ ++static int wm97xx_sys_add(struct device *dev) ++{ ++ if (aux_sys) { ++ device_create_file(dev, &dev_attr_aux1); ++ device_create_file(dev, &dev_attr_aux2); ++ device_create_file(dev, &dev_attr_aux3); ++ device_create_file(dev, &dev_attr_aux4); ++ } ++ if (status_sys) ++ device_create_file(dev, &dev_attr_gpio); ++ return 0; ++} ++ ++static void wm97xx_sys_remove(struct device *dev) ++{ ++ if (status_sys) ++ device_remove_file(dev, &dev_attr_gpio); ++ if (aux_sys) { ++ device_remove_file(dev, &dev_attr_aux1); ++ device_remove_file(dev, &dev_attr_aux2); ++ device_remove_file(dev, &dev_attr_aux3); ++ device_remove_file(dev, &dev_attr_aux4); ++ } ++} ++ ++/** ++ * wm97xx_get_gpio - Get the status of a codec GPIO. ++ * @wm: wm97xx device. ++ * @gpio: gpio ++ * ++ * Get the status of a codec GPIO pin ++ */ ++ ++wm97xx_gpio_status_t wm97xx_get_gpio(struct wm97xx *wm, u32 gpio) ++{ ++ u16 status; ++ wm97xx_gpio_status_t ret; ++ ++ mutex_lock(&wm->codec_mutex); ++ status = wm97xx_reg_read(wm, AC97_GPIO_STATUS); ++ ++ if (status & gpio) ++ ret = WM97XX_GPIO_HIGH; ++ else ++ ret = WM97XX_GPIO_LOW; ++ ++ mutex_unlock(&wm->codec_mutex); ++ return ret; ++} ++ ++/** ++ * wm97xx_set_gpio - Set the status of a codec GPIO. ++ * @wm: wm97xx device. ++ * @gpio: gpio ++ * ++ * ++ * Set the status of a codec GPIO pin ++ */ ++ ++void wm97xx_set_gpio(struct wm97xx *wm, u32 gpio, ++ wm97xx_gpio_status_t status) ++{ ++ u16 reg; ++ ++ mutex_lock(&wm->codec_mutex); ++ reg = wm97xx_reg_read(wm, AC97_GPIO_STATUS); ++ ++ if (status & WM97XX_GPIO_HIGH) ++ reg |= gpio; ++ else ++ reg &= ~gpio; ++ ++ if (wm->id == WM9712_ID2) ++ wm97xx_reg_write(wm, AC97_GPIO_STATUS, reg << 1); ++ else ++ wm97xx_reg_write(wm, AC97_GPIO_STATUS, reg); ++ mutex_unlock(&wm->codec_mutex); ++} ++ ++/* ++ * Codec GPIO pin configuration, this set's pin direction, polarity, ++ * stickyness and wake up. ++ */ ++void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio, wm97xx_gpio_dir_t dir, ++ wm97xx_gpio_pol_t pol, wm97xx_gpio_sticky_t sticky, ++ wm97xx_gpio_wake_t wake) ++{ ++ u16 reg; ++ ++ mutex_lock(&wm->codec_mutex); ++ reg = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); ++ ++ if (pol == WM97XX_GPIO_POL_HIGH) ++ reg |= gpio; ++ else ++ reg &= ~gpio; ++ ++ wm97xx_reg_write(wm, AC97_GPIO_POLARITY, reg); ++ reg = wm97xx_reg_read(wm, AC97_GPIO_STICKY); ++ ++ if (sticky == WM97XX_GPIO_STICKY) ++ reg |= gpio; ++ else ++ reg &= ~gpio; ++ ++ wm97xx_reg_write(wm, AC97_GPIO_STICKY, reg); ++ reg = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP); ++ ++ if (wake == WM97XX_GPIO_WAKE) ++ reg |= gpio; ++ else ++ reg &= ~gpio; ++ ++ wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, reg); ++ reg = wm97xx_reg_read(wm, AC97_GPIO_CFG); ++ ++ if (dir == WM97XX_GPIO_IN) ++ reg |= gpio; ++ else ++ reg &= ~gpio; ++ ++ wm97xx_reg_write(wm, AC97_GPIO_CFG, reg); ++ mutex_unlock(&wm->codec_mutex); ++} ++ ++/* ++ * Handle a pen down interrupt. ++ */ ++static void wm97xx_pen_irq_worker(void *ptr) ++{ ++ struct wm97xx *wm = (struct wm97xx *) ptr; ++ ++ /* do we need to enable the touch panel reader */ ++ if (wm->id == WM9705_ID2) { ++ if (wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD) & WM97XX_PEN_DOWN) ++ wm->pen_is_down = 1; ++ else ++ wm->pen_is_down = 0; ++ wake_up_interruptible(&wm->pen_irq_wait); ++ } else { ++ u16 status, pol; ++ mutex_lock(&wm->codec_mutex); ++ status = wm97xx_reg_read(wm, AC97_GPIO_STATUS); ++ pol = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); ++ ++ if (WM97XX_GPIO_13 & pol & status) { ++ wm->pen_is_down = 1; ++ wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol & ~WM97XX_GPIO_13); ++ } else { ++ wm->pen_is_down = 0; ++ wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol | WM97XX_GPIO_13); ++ } ++ ++ if (wm->id == WM9712_ID2) ++ wm97xx_reg_write(wm, AC97_GPIO_STATUS, (status & ~WM97XX_GPIO_13) << 1); ++ else ++ wm97xx_reg_write(wm, AC97_GPIO_STATUS, status & ~WM97XX_GPIO_13); ++ mutex_unlock(&wm->codec_mutex); ++ wake_up_interruptible(&wm->pen_irq_wait); ++ } ++ ++ if (!wm->pen_is_down && wm->mach_ops && wm->mach_ops->acc_enabled) ++ wm->mach_ops->acc_pen_up(wm); ++ enable_irq(wm->pen_irq); ++} ++ ++/* ++ * Codec PENDOWN irq handler ++ * ++ * We have to disable the codec interrupt in the handler because it can ++ * take upto 1ms to clear the interrupt source. The interrupt is then enabled ++ * again in the slow handler when the source has been cleared. ++ */ ++static irqreturn_t wm97xx_pen_interrupt(int irq, void *dev_id, ++ struct pt_regs *regs) ++{ ++ struct wm97xx *wm = (struct wm97xx *) dev_id; ++ disable_irq(wm->pen_irq); ++ queue_work(wm->pen_irq_workq, &wm->pen_event_work); ++ return IRQ_HANDLED; ++} ++ ++/* ++ * initialise pen IRQ handler and workqueue ++ */ ++static int wm97xx_init_pen_irq(struct wm97xx *wm) ++{ ++ u16 reg; ++ ++ INIT_WORK(&wm->pen_event_work, wm97xx_pen_irq_worker, wm); ++ if ((wm->pen_irq_workq = ++ create_singlethread_workqueue("kwm97pen")) == NULL) { ++ err("could not create pen irq work queue"); ++ wm->pen_irq = 0; ++ return -EINVAL; ++ } ++ ++ if (request_irq (wm->pen_irq, wm97xx_pen_interrupt, SA_SHIRQ, "wm97xx-pen", wm)) { ++ err("could not register codec pen down interrupt, will poll for pen down"); ++ destroy_workqueue(wm->pen_irq_workq); ++ wm->pen_irq = 0; ++ return -EINVAL; ++ } ++ ++ /* enable PEN down on wm9712/13 */ ++ if (wm->id != WM9705_ID2) { ++ reg = wm97xx_reg_read(wm, AC97_MISC_AFE); ++ wm97xx_reg_write(wm, AC97_MISC_AFE, reg & 0xfffb); ++ reg = wm97xx_reg_read(wm, 0x5a); ++ wm97xx_reg_write(wm, 0x5a, reg & ~0x0001); ++ } ++ ++ return 0; ++} ++ ++/* Private struct for communication between struct wm97xx_tshread ++ * and wm97xx_read_samples */ ++struct ts_state { ++ int sleep_time; ++ int min_sleep_time; ++}; ++ ++static int wm97xx_read_samples(struct wm97xx *wm, struct ts_state *state) ++{ ++ struct wm97xx_data data; ++ int rc; ++ ++ mutex_lock(&wm->codec_mutex); ++ ++ if (wm->mach_ops && wm->mach_ops->acc_enabled) ++ rc = wm->mach_ops->acc_pen_down(wm); ++ else ++ rc = wm->codec->poll_touch(wm, &data); ++ ++ if (rc & RC_PENUP) { ++ if (wm->pen_is_down) { ++ wm->pen_is_down = 0; ++ dbg("pen up"); ++ input_report_abs(wm->input_dev, ABS_PRESSURE, 0); ++ input_sync(wm->input_dev); ++ } else if (!(rc & RC_AGAIN)) { ++ /* We need high frequency updates only while pen is down, ++ * the user never will be able to touch screen faster than ++ * a few times per second... On the other hand, when the ++ * user is actively working with the touchscreen we don't ++ * want to lose the quick response. So we will slowly ++ * increase sleep time after the pen is up and quicky ++ * restore it to ~one task switch when pen is down again. ++ */ ++ if (state->sleep_time < HZ / 10) ++ state->sleep_time++; ++ } ++ ++ } else if (rc & RC_VALID) { ++ dbg("pen down: x=%x:%d, y=%x:%d, pressure=%x:%d\n", ++ data.x >> 12, data.x & 0xfff, data.y >> 12, ++ data.y & 0xfff, data.p >> 12, data.p & 0xfff); ++ input_report_abs(wm->input_dev, ABS_X, data.x & 0xfff); ++ input_report_abs(wm->input_dev, ABS_Y, data.y & 0xfff); ++ input_report_abs(wm->input_dev, ABS_PRESSURE, data.p & 0xfff); ++ input_sync(wm->input_dev); ++ wm->pen_is_down = 1; ++ state->sleep_time = state->min_sleep_time; ++ } else if (rc & RC_PENDOWN) { ++ dbg("pen down"); ++ wm->pen_is_down = 1; ++ state->sleep_time = state->min_sleep_time; ++ } ++ ++ mutex_unlock(&wm->codec_mutex); ++ return rc; ++} ++ ++/* ++* The touchscreen sample reader thread. ++*/ ++static int wm97xx_ts_read(void *data) ++{ ++ int rc; ++ struct ts_state state; ++ struct wm97xx *wm = (struct wm97xx *) data; ++ ++ /* set up thread context */ ++ wm->ts_task = current; ++ daemonize("kwm97xxts"); ++ ++ if (wm->codec == NULL) { ++ wm->ts_task = NULL; ++ printk(KERN_ERR "codec is NULL, bailing\n"); ++ } ++ ++ complete(&wm->ts_init); ++ wm->pen_is_down = 0; ++ state.min_sleep_time = HZ >= 100 ? HZ / 100 : 1; ++ if (state.min_sleep_time < 1) ++ state.min_sleep_time = 1; ++ state.sleep_time = state.min_sleep_time; ++ ++ /* touch reader loop */ ++ while (wm->ts_task) { ++ do { ++ try_to_freeze(); ++ rc = wm97xx_read_samples(wm, &state); ++ } while (rc & RC_AGAIN); ++ if (!wm->pen_is_down && wm->pen_irq) { ++ /* Nice, we don't have to poll for pen down event */ ++ wait_event_interruptible(wm->pen_irq_wait, wm->pen_is_down); ++ } else { ++ set_task_state(current, TASK_INTERRUPTIBLE); ++ schedule_timeout(state.sleep_time); ++ } ++ } ++ complete_and_exit(&wm->ts_exit, 0); ++} ++ ++/** ++ * wm97xx_ts_input_open - Open the touch screen input device. ++ * @idev: Input device to be opened. ++ * ++ * Called by the input sub system to open a wm97xx touchscreen device. ++ * Starts the touchscreen thread and touch digitiser. ++ */ ++static int wm97xx_ts_input_open(struct input_dev *idev) ++{ ++ int ret = 0; ++ struct wm97xx *wm = (struct wm97xx *) idev->private; ++ ++ mutex_lock(&wm->codec_mutex); ++ /* first time opened ? */ ++ if (wm->ts_use_count++ == 0) { ++ /* start touchscreen thread */ ++ init_completion(&wm->ts_init); ++ init_completion(&wm->ts_exit); ++ ret = kernel_thread(wm97xx_ts_read, wm, CLONE_KERNEL); ++ ++ if (ret >= 0) { ++ wait_for_completion(&wm->ts_init); ++ if (wm->ts_task == NULL) ++ ret = -EINVAL; ++ } else { ++ mutex_unlock(&wm->codec_mutex); ++ return ret; ++ } ++ ++ /* start digitiser */ ++ if (wm->mach_ops && wm->mach_ops->acc_enabled) ++ wm->codec->acc_enable(wm, 1); ++ wm->codec->digitiser_ioctl(wm, WM97XX_DIG_START); ++ ++ /* init pen down/up irq handling */ ++ if (wm->pen_irq) { ++ wm97xx_init_pen_irq(wm); ++ ++ if (wm->pen_irq == 0) { ++ /* we failed to get an irq for pen down events, ++ * so we resort to polling. kickstart the reader */ ++ wm->pen_is_down = 1; ++ wake_up_interruptible(&wm->pen_irq_wait); ++ } ++ } ++ } ++ ++ mutex_unlock(&wm->codec_mutex); ++ return 0; ++} ++ ++/** ++ * wm97xx_ts_input_close - Close the touch screen input device. ++ * @idev: Input device to be closed. ++ * ++ * Called by the input sub system to close a wm97xx touchscreen device. ++ * Kills the touchscreen thread and stops the touch digitiser. ++ */ ++ ++static void wm97xx_ts_input_close(struct input_dev *idev) ++{ ++ struct wm97xx *wm = (struct wm97xx *) idev->private; ++ ++ mutex_lock(&wm->codec_mutex); ++ if (--wm->ts_use_count == 0) { ++ /* destroy workqueues and free irqs */ ++ if (wm->pen_irq) { ++ free_irq(wm->pen_irq, wm); ++ destroy_workqueue(wm->pen_irq_workq); ++ } ++ ++ /* kill thread */ ++ if (wm->ts_task) { ++ wm->ts_task = NULL; ++ wm->pen_is_down = 1; ++ wake_up_interruptible(&wm->pen_irq_wait); ++ wait_for_completion(&wm->ts_exit); ++ wm->pen_is_down = 0; ++ } ++ ++ /* stop digitiser */ ++ wm->codec->digitiser_ioctl(wm, WM97XX_DIG_STOP); ++ if (wm->mach_ops && wm->mach_ops->acc_enabled) ++ wm->codec->acc_enable(wm, 0); ++ } ++ mutex_unlock(&wm->codec_mutex); ++} ++ ++static int wm97xx_bus_match(struct device *dev, struct device_driver *drv) ++{ ++ return !(strcmp(dev->bus_id,drv->name)); ++} ++ ++/* ++ * The AC97 audio driver will do all the Codec suspend and resume ++ * tasks. This is just for anything machine specific or extra. ++ */ ++static int wm97xx_bus_suspend(struct device *dev, pm_message_t state) ++{ ++ int ret = 0; ++ ++ if (dev->driver && dev->driver->suspend) ++ ret = dev->driver->suspend(dev, state); ++ ++ return ret; ++} ++ ++static int wm97xx_bus_resume(struct device *dev) ++{ ++ int ret = 0; ++ ++ if (dev->driver && dev->driver->resume) ++ ret = dev->driver->resume(dev); ++ ++ return ret; ++} ++ ++struct bus_type wm97xx_bus_type = { ++ .name = "wm97xx", ++ .match = wm97xx_bus_match, ++ .suspend = wm97xx_bus_suspend, ++ .resume = wm97xx_bus_resume, ++}; ++ ++static void wm97xx_release(struct device *dev) ++{ ++ kfree(dev); ++} ++ ++static int wm97xx_probe(struct device *dev) ++{ ++ struct wm97xx* wm; ++ int ret = 0, id = 0; ++ ++ if (!(wm = kzalloc(sizeof(struct wm97xx), GFP_KERNEL))) ++ return -ENOMEM; ++ mutex_init(&wm->codec_mutex); ++ ++ init_waitqueue_head(&wm->pen_irq_wait); ++ wm->dev = dev; ++ dev->driver_data = wm; ++ wm->ac97 = to_ac97_t(dev); ++ ++ /* check that we have a supported codec */ ++ if ((id = wm97xx_reg_read(wm, AC97_VENDOR_ID1)) != WM97XX_ID1) { ++ err("could not find a wm97xx, found a %x instead\n", id); ++ kfree(wm); ++ return -ENODEV; ++ } ++ ++ wm->id = wm97xx_reg_read(wm, AC97_VENDOR_ID2); ++ if(wm->id != wm97xx_codec.id) { ++ err("could not find a the selected codec, please build for wm97%2x", wm->id & 0xff); ++ kfree(wm); ++ return -ENODEV; ++ } ++ ++ if((wm->input_dev = input_allocate_device()) == NULL) { ++ kfree(wm); ++ return -ENOMEM; ++ } ++ ++ /* set up touch configuration */ ++ info("detected a wm97%2x codec", wm->id & 0xff); ++ wm->input_dev->name = "wm97xx touchscreen"; ++ wm->input_dev->open = wm97xx_ts_input_open; ++ wm->input_dev->close = wm97xx_ts_input_close; ++ set_bit(EV_ABS, wm->input_dev->evbit); ++ set_bit(ABS_X, wm->input_dev->absbit); ++ set_bit(ABS_Y, wm->input_dev->absbit); ++ set_bit(ABS_PRESSURE, wm->input_dev->absbit); ++ wm->input_dev->absmax[ABS_X] = abs_x[1]; ++ wm->input_dev->absmax[ABS_Y] = abs_y[1]; ++ wm->input_dev->absmax[ABS_PRESSURE] = abs_p[1]; ++ wm->input_dev->absmin[ABS_X] = abs_x[0]; ++ wm->input_dev->absmin[ABS_Y] = abs_y[0]; ++ wm->input_dev->absmin[ABS_PRESSURE] = abs_p[0]; ++ wm->input_dev->absfuzz[ABS_X] = abs_x[2]; ++ wm->input_dev->absfuzz[ABS_Y] = abs_y[2]; ++ wm->input_dev->absfuzz[ABS_PRESSURE] = abs_p[2]; ++ wm->input_dev->private = wm; ++ wm->codec = &wm97xx_codec; ++ if((ret = input_register_device(wm->input_dev)) < 0) { ++ kfree(wm); ++ return -ENOMEM; ++ } ++ ++ if(aux_sys) ++ wm97xx_sys_add(dev); ++ ++ /* set up physical characteristics */ ++ wm->codec->digitiser_ioctl(wm, WM97XX_PHY_INIT); ++ ++ /* load gpio cache */ ++ wm->gpio[0] = wm97xx_reg_read(wm, AC97_GPIO_CFG); ++ wm->gpio[1] = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); ++ wm->gpio[2] = wm97xx_reg_read(wm, AC97_GPIO_STICKY); ++ wm->gpio[3] = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP); ++ wm->gpio[4] = wm97xx_reg_read(wm, AC97_GPIO_STATUS); ++ wm->gpio[5] = wm97xx_reg_read(wm, AC97_MISC_AFE); ++ ++ /* register our battery device */ ++ if (!(wm->battery_dev = kzalloc(sizeof(struct device), GFP_KERNEL))) { ++ ret = -ENOMEM; ++ goto batt_err; ++ } ++ wm->battery_dev->bus = &wm97xx_bus_type; ++ strcpy(wm->battery_dev->bus_id,"wm97xx-battery"); ++ wm->battery_dev->driver_data = wm; ++ wm->battery_dev->parent = dev; ++ wm->battery_dev->release = wm97xx_release; ++ if((ret = device_register(wm->battery_dev)) < 0) ++ goto batt_reg_err; ++ ++ /* register our extended touch device (for machine specific extensions) */ ++ if (!(wm->touch_dev = kzalloc(sizeof(struct device), GFP_KERNEL))) { ++ ret = -ENOMEM; ++ goto touch_err; ++ } ++ wm->touch_dev->bus = &wm97xx_bus_type; ++ strcpy(wm->touch_dev->bus_id,"wm97xx-touchscreen"); ++ wm->touch_dev->driver_data = wm; ++ wm->touch_dev->parent = dev; ++ wm->touch_dev->release = wm97xx_release; ++ if((ret = device_register(wm->touch_dev)) < 0) ++ goto touch_reg_err; ++ ++ return ret; ++ ++touch_reg_err: ++ kfree(wm->touch_dev); ++touch_err: ++ device_unregister(wm->battery_dev); ++batt_reg_err: ++ kfree(wm->battery_dev); ++batt_err: ++ input_unregister_device(wm->input_dev); ++ kfree(wm); ++ return ret; ++} ++ ++static int wm97xx_remove(struct device *dev) ++{ ++ struct wm97xx *wm = dev_get_drvdata(dev); ++ ++ /* Stop touch reader thread */ ++ if (wm->ts_task) { ++ wm->ts_task = NULL; ++ wm->pen_is_down = 1; ++ wake_up_interruptible(&wm->pen_irq_wait); ++ wait_for_completion(&wm->ts_exit); ++ } ++ device_unregister(wm->battery_dev); ++ device_unregister(wm->touch_dev); ++ input_unregister_device(wm->input_dev); ++ ++ if(aux_sys) ++ wm97xx_sys_remove(dev); ++ ++ kfree(wm); ++ return 0; ++} ++ ++#ifdef CONFIG_PM ++int wm97xx_resume(struct device* dev) ++{ ++ struct wm97xx *wm = dev_get_drvdata(dev); ++ ++ /* restore digitiser and gpio's */ ++ if(wm->id == WM9713_ID2) { ++ wm97xx_reg_write(wm, AC97_WM9713_DIG1, wm->dig[0]); ++ wm97xx_reg_write(wm, 0x5a, wm->misc); ++ if(wm->ts_use_count) { ++ u16 reg = wm97xx_reg_read(wm, AC97_EXTENDED_MID) & 0x7fff; ++ wm97xx_reg_write(wm, AC97_EXTENDED_MID, reg); ++ } ++ } ++ ++ wm97xx_reg_write(wm, AC97_WM9713_DIG2, wm->dig[1]); ++ wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2]); ++ ++ wm97xx_reg_write(wm, AC97_GPIO_CFG, wm->gpio[0]); ++ wm97xx_reg_write(wm, AC97_GPIO_POLARITY, wm->gpio[1]); ++ wm97xx_reg_write(wm, AC97_GPIO_STICKY, wm->gpio[2]); ++ wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, wm->gpio[3]); ++ wm97xx_reg_write(wm, AC97_GPIO_STATUS, wm->gpio[4]); ++ wm97xx_reg_write(wm, AC97_MISC_AFE, wm->gpio[5]); ++ ++ return 0; ++} ++ ++#else ++#define wm97xx_resume NULL ++#endif ++ ++int wm97xx_register_mach_ops(struct wm97xx *wm, struct wm97xx_mach_ops *mach_ops) ++{ ++ mutex_lock(&wm->codec_mutex); ++ if(wm->mach_ops) { ++ mutex_unlock(&wm->codec_mutex); ++ return -EINVAL; ++ } ++ wm->mach_ops = mach_ops; ++ mutex_unlock(&wm->codec_mutex); ++ return 0; ++} ++ ++void wm97xx_unregister_mach_ops(struct wm97xx *wm) ++{ ++ mutex_lock(&wm->codec_mutex); ++ wm->mach_ops = NULL; ++ mutex_unlock(&wm->codec_mutex); ++} ++ ++static struct device_driver wm97xx_driver = { ++ .name = "ac97", ++ .bus = &ac97_bus_type, ++ .owner = THIS_MODULE, ++ .probe = wm97xx_probe, ++ .remove = wm97xx_remove, ++ .resume = wm97xx_resume, ++}; ++ ++static int __init wm97xx_init(void) ++{ ++ int ret; ++ ++ info("version %s liam.girdwood@wolfsonmicro.com", WM_CORE_VERSION); ++ if((ret = bus_register(&wm97xx_bus_type)) < 0) ++ return ret; ++ return driver_register(&wm97xx_driver); ++} ++ ++static void __exit wm97xx_exit(void) ++{ ++ driver_unregister(&wm97xx_driver); ++ bus_unregister(&wm97xx_bus_type); ++} ++ ++EXPORT_SYMBOL_GPL(wm97xx_get_gpio); ++EXPORT_SYMBOL_GPL(wm97xx_set_gpio); ++EXPORT_SYMBOL_GPL(wm97xx_config_gpio); ++EXPORT_SYMBOL_GPL(wm97xx_read_aux_adc); ++EXPORT_SYMBOL_GPL(wm97xx_reg_read); ++EXPORT_SYMBOL_GPL(wm97xx_reg_write); ++EXPORT_SYMBOL_GPL(wm97xx_bus_type); ++EXPORT_SYMBOL_GPL(wm97xx_register_mach_ops); ++EXPORT_SYMBOL_GPL(wm97xx_unregister_mach_ops); ++ ++module_init(wm97xx_init); ++module_exit(wm97xx_exit); ++ ++/* Module information */ ++MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); ++MODULE_DESCRIPTION("WM97xx Core - Touch Screen / AUX ADC / GPIO Driver"); ++MODULE_LICENSE("GPL"); +Index: linux-2.6.17/include/linux/wm97xx.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.17/include/linux/wm97xx.h 2006-09-19 20:36:47.973052250 +0200 +@@ -0,0 +1,291 @@ ++ ++/* ++ * Register bits and API for Wolfson WM97xx series of codecs ++ */ ++ ++#ifndef _LINUX_WM97XX_H ++#define _LINUX_WM97XX_H ++ ++#include <sound/driver.h> ++#include <sound/core.h> ++#include <sound/pcm.h> ++#include <sound/ac97_codec.h> ++#include <sound/initval.h> ++#include <linux/types.h> ++#include <linux/list.h> ++#include <linux/input.h> /* Input device layer */ ++ ++/* ++ * WM97xx AC97 Touchscreen registers ++ */ ++#define AC97_WM97XX_DIGITISER1 0x76 ++#define AC97_WM97XX_DIGITISER2 0x78 ++#define AC97_WM97XX_DIGITISER_RD 0x7a ++#define AC97_WM9713_DIG1 0x74 ++#define AC97_WM9713_DIG2 AC97_WM97XX_DIGITISER1 ++#define AC97_WM9713_DIG3 AC97_WM97XX_DIGITISER2 ++ ++/* ++ * WM97xx register bits ++ */ ++#define WM97XX_POLL 0x8000 /* initiate a polling measurement */ ++#define WM97XX_ADCSEL_X 0x1000 /* x coord measurement */ ++#define WM97XX_ADCSEL_Y 0x2000 /* y coord measurement */ ++#define WM97XX_ADCSEL_PRES 0x3000 /* pressure measurement */ ++#define WM97XX_ADCSEL_MASK 0x7000 ++#define WM97XX_COO 0x0800 /* enable coordinate mode */ ++#define WM97XX_CTC 0x0400 /* enable continuous mode */ ++#define WM97XX_CM_RATE_93 0x0000 /* 93.75Hz continuous rate */ ++#define WM97XX_CM_RATE_187 0x0100 /* 187.5Hz continuous rate */ ++#define WM97XX_CM_RATE_375 0x0200 /* 375Hz continuous rate */ ++#define WM97XX_CM_RATE_750 0x0300 /* 750Hz continuous rate */ ++#define WM97XX_CM_RATE_8K 0x00f0 /* 8kHz continuous rate */ ++#define WM97XX_CM_RATE_12K 0x01f0 /* 12kHz continuous rate */ ++#define WM97XX_CM_RATE_24K 0x02f0 /* 24kHz continuous rate */ ++#define WM97XX_CM_RATE_48K 0x03f0 /* 48kHz continuous rate */ ++#define WM97XX_CM_RATE_MASK 0x03f0 ++#define WM97XX_RATE(i) (((i & 3) << 8) | ((i & 4) ? 0xf0 : 0)) ++#define WM97XX_DELAY(i) ((i << 4) & 0x00f0) /* sample delay times */ ++#define WM97XX_DELAY_MASK 0x00f0 ++#define WM97XX_SLEN 0x0008 /* slot read back enable */ ++#define WM97XX_SLT(i) ((i - 5) & 0x7) /* touchpanel slot selection (5-11) */ ++#define WM97XX_SLT_MASK 0x0007 ++#define WM97XX_PRP_DETW 0x4000 /* pen detect on, digitiser off, wake up */ ++#define WM97XX_PRP_DET 0x8000 /* pen detect on, digitiser off, no wake up */ ++#define WM97XX_PRP_DET_DIG 0xc000 /* pen detect on, digitiser on */ ++#define WM97XX_RPR 0x2000 /* wake up on pen down */ ++#define WM97XX_PEN_DOWN 0x8000 /* pen is down */ ++#define WM97XX_ADCSRC_MASK 0x7000 /* ADC source mask */ ++ ++#define WM97XX_AUX_ID1 0x8001 ++#define WM97XX_AUX_ID2 0x8002 ++#define WM97XX_AUX_ID3 0x8003 ++#define WM97XX_AUX_ID4 0x8004 ++ ++ ++/* WM9712 Bits */ ++#define WM9712_45W 0x1000 /* set for 5-wire touchscreen */ ++#define WM9712_PDEN 0x0800 /* measure only when pen down */ ++#define WM9712_WAIT 0x0200 /* wait until adc is read before next sample */ ++#define WM9712_PIL 0x0100 /* current used for pressure measurement. set 400uA else 200uA */ ++#define WM9712_MASK_HI 0x0040 /* hi on mask pin (47) stops conversions */ ++#define WM9712_MASK_EDGE 0x0080 /* rising/falling edge on pin delays sample */ ++#define WM9712_MASK_SYNC 0x00c0 /* rising/falling edge on mask initiates sample */ ++#define WM9712_RPU(i) (i&0x3f) /* internal pull up on pen detect (64k / rpu) */ ++#define WM9712_PD(i) (0x1 << i) /* power management */ ++ ++/* WM9712 Registers */ ++#define AC97_WM9712_POWER 0x24 ++#define AC97_WM9712_REV 0x58 ++ ++/* WM9705 Bits */ ++#define WM9705_PDEN 0x1000 /* measure only when pen is down */ ++#define WM9705_PINV 0x0800 /* inverts sense of pen down output */ ++#define WM9705_BSEN 0x0400 /* BUSY flag enable, pin47 is 1 when busy */ ++#define WM9705_BINV 0x0200 /* invert BUSY (pin47) output */ ++#define WM9705_WAIT 0x0100 /* wait until adc is read before next sample */ ++#define WM9705_PIL 0x0080 /* current used for pressure measurement. set 400uA else 200uA */ ++#define WM9705_PHIZ 0x0040 /* set PHONE and PCBEEP inputs to high impedance */ ++#define WM9705_MASK_HI 0x0010 /* hi on mask stops conversions */ ++#define WM9705_MASK_EDGE 0x0020 /* rising/falling edge on pin delays sample */ ++#define WM9705_MASK_SYNC 0x0030 /* rising/falling edge on mask initiates sample */ ++#define WM9705_PDD(i) (i & 0x000f) /* pen detect comparator threshold */ ++ ++ ++/* WM9713 Bits */ ++#define WM9713_PDPOL 0x0400 /* Pen down polarity */ ++#define WM9713_POLL 0x0200 /* initiate a polling measurement */ ++#define WM9713_CTC 0x0100 /* enable continuous mode */ ++#define WM9713_ADCSEL_X 0x0002 /* X measurement */ ++#define WM9713_ADCSEL_Y 0x0004 /* Y measurement */ ++#define WM9713_ADCSEL_PRES 0x0008 /* Pressure measurement */ ++#define WM9713_COO 0x0001 /* enable coordinate mode */ ++#define WM9713_PDEN 0x0800 /* measure only when pen down */ ++#define WM9713_ADCSEL_MASK 0x00fe /* ADC selection mask */ ++#define WM9713_WAIT 0x0200 /* coordinate wait */ ++ ++/* AUX ADC ID's */ ++#define TS_COMP1 0x0 ++#define TS_COMP2 0x1 ++#define TS_BMON 0x2 ++#define TS_WIPER 0x3 ++ ++/* ID numbers */ ++#define WM97XX_ID1 0x574d ++#define WM9712_ID2 0x4c12 ++#define WM9705_ID2 0x4c05 ++#define WM9713_ID2 0x4c13 ++ ++/* Codec GPIO's */ ++#define WM97XX_MAX_GPIO 16 ++#define WM97XX_GPIO_1 (1 << 1) ++#define WM97XX_GPIO_2 (1 << 2) ++#define WM97XX_GPIO_3 (1 << 3) ++#define WM97XX_GPIO_4 (1 << 4) ++#define WM97XX_GPIO_5 (1 << 5) ++#define WM97XX_GPIO_6 (1 << 6) ++#define WM97XX_GPIO_7 (1 << 7) ++#define WM97XX_GPIO_8 (1 << 8) ++#define WM97XX_GPIO_9 (1 << 9) ++#define WM97XX_GPIO_10 (1 << 10) ++#define WM97XX_GPIO_11 (1 << 11) ++#define WM97XX_GPIO_12 (1 << 12) ++#define WM97XX_GPIO_13 (1 << 13) ++#define WM97XX_GPIO_14 (1 << 14) ++#define WM97XX_GPIO_15 (1 << 15) ++ ++ ++#define AC97_LINK_FRAME 21 /* time in uS for AC97 link frame */ ++ ++ ++/*---------------- Return codes from sample reading functions ---------------*/ ++ ++/* More data is available; call the sample gathering function again */ ++#define RC_AGAIN 0x00000001 ++/* The returned sample is valid */ ++#define RC_VALID 0x00000002 ++/* The pen is up (the first RC_VALID without RC_PENUP means pen is down) */ ++#define RC_PENUP 0x00000004 ++/* The pen is down (RC_VALID implies RC_PENDOWN, but sometimes it is helpful ++ to tell the handler that the pen is down but we don't know yet his coords, ++ so the handler should not sleep or wait for pendown irq) */ ++#define RC_PENDOWN 0x00000008 ++ ++/* The wm97xx driver provides a private API for writing platform-specific ++ * drivers. ++ */ ++ ++/* The structure used to return arch specific sampled data into */ ++struct wm97xx_data { ++ int x; ++ int y; ++ int p; ++}; ++ ++/* Codec GPIO status ++ */ ++typedef enum { ++ WM97XX_GPIO_HIGH, ++ WM97XX_GPIO_LOW ++} wm97xx_gpio_status_t; ++ ++/* Codec GPIO direction ++ */ ++typedef enum { ++ WM97XX_GPIO_IN, ++ WM97XX_GPIO_OUT ++} wm97xx_gpio_dir_t; ++ ++/* Codec GPIO polarity ++ */ ++typedef enum { ++ WM97XX_GPIO_POL_HIGH, ++ WM97XX_GPIO_POL_LOW ++} wm97xx_gpio_pol_t; ++ ++/* Codec GPIO sticky ++ */ ++typedef enum { ++ WM97XX_GPIO_STICKY, ++ WM97XX_GPIO_NOTSTICKY ++} wm97xx_gpio_sticky_t; ++ ++/* Codec GPIO wake ++ */ ++typedef enum { ++ WM97XX_GPIO_WAKE, ++ WM97XX_GPIO_NOWAKE ++} wm97xx_gpio_wake_t; ++ ++ ++/* ++ * Digitiser ioctl commands ++ */ ++#define WM97XX_DIG_START 0x1 ++#define WM97XX_DIG_STOP 0x2 ++#define WM97XX_PHY_INIT 0x3 ++#define WM97XX_AUX_PREPARE 0x4 ++#define WM97XX_DIG_RESTORE 0x5 ++ ++struct wm97xx; ++extern struct wm97xx_codec_drv wm97xx_codec; ++ ++/* ++ * Codec driver interface - allows mapping to WM9705/12/13 and newer codecs ++ */ ++struct wm97xx_codec_drv { ++ u16 id; ++ char *name; ++ int (*poll_sample) (struct wm97xx *, int adcsel, int *sample); /* read 1 sample */ ++ int (*poll_touch) (struct wm97xx *, struct wm97xx_data *); /* read X,Y,[P] in poll */ ++ int (*digitiser_ioctl) (struct wm97xx *, int cmd); ++ int (*acc_enable) (struct wm97xx *, int enable); ++}; ++ ++ ++/* Machine specific and accelerated touch operations */ ++struct wm97xx_mach_ops { ++ ++ /* accelerated touch readback - coords are transmited on AC97 link */ ++ int acc_enabled; ++ void (*acc_pen_up) (struct wm97xx *); ++ int (*acc_pen_down) (struct wm97xx *); ++ int (*acc_startup) (struct wm97xx *); ++ void (*acc_shutdown) (struct wm97xx *); ++ ++ /* pre and post sample - can be used to minimise any analog noise */ ++ void (*pre_sample) (int); /* function to run before sampling */ ++ void (*post_sample) (int); /* function to run after sampling */ ++}; ++ ++struct wm97xx { ++ u16 dig[3], id, gpio[6], misc; /* Cached codec registers */ ++ u16 dig_save[3]; /* saved during aux reading */ ++ struct wm97xx_codec_drv *codec; /* attached codec driver*/ ++ struct input_dev* input_dev; /* touchscreen input device */ ++ ac97_t *ac97; /* ALSA codec access */ ++ struct device *dev; /* ALSA device */ ++ struct device *battery_dev; ++ struct device *touch_dev; ++ struct wm97xx_mach_ops *mach_ops; ++ struct mutex codec_mutex; ++ struct completion ts_init; ++ struct completion ts_exit; ++ struct task_struct *ts_task; ++ unsigned int pen_irq; /* Pen IRQ number in use */ ++ wait_queue_head_t pen_irq_wait; /* Pen IRQ wait queue */ ++ struct workqueue_struct *pen_irq_workq; ++ struct work_struct pen_event_work; ++ u16 acc_slot; /* AC97 slot used for acc touch data */ ++ u16 acc_rate; /* acc touch data rate */ ++ unsigned int ts_use_count; ++ unsigned pen_is_down:1; /* Pen is down */ ++ unsigned aux_waiting:1; /* aux measurement waiting */ ++ unsigned pen_probably_down:1; /* used in polling mode */ ++}; ++ ++/* Codec GPIO access (not supported on WM9705) ++ * This can be used to set/get codec GPIO and Virtual GPIO status. ++ */ ++wm97xx_gpio_status_t wm97xx_get_gpio(struct wm97xx *wm, u32 gpio); ++void wm97xx_set_gpio(struct wm97xx *wm, u32 gpio, ++ wm97xx_gpio_status_t status); ++void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio, ++ wm97xx_gpio_dir_t dir, ++ wm97xx_gpio_pol_t pol, ++ wm97xx_gpio_sticky_t sticky, ++ wm97xx_gpio_wake_t wake); ++ ++/* codec AC97 IO access */ ++int wm97xx_reg_read(struct wm97xx *wm, u16 reg); ++void wm97xx_reg_write(struct wm97xx *wm, u16 reg, u16 val); ++ ++/* aux adc readback */ ++int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel); ++ ++/* machine ops */ ++int wm97xx_register_mach_ops(struct wm97xx *, struct wm97xx_mach_ops *); ++void wm97xx_unregister_mach_ops(struct wm97xx *); ++ ++extern struct bus_type wm97xx_bus_type; ++#endif |