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authorMarcin Juszkiewicz <hrw@openembedded.org>2007-10-30 15:21:19 +0000
committerMarcin Juszkiewicz <hrw@openembedded.org>2007-10-30 15:21:19 +0000
commita43e2b53a23bbd6955209a01a8388508f9205857 (patch)
treed9c5818b83a56f33baf0cb5d5a3bb34c49365845 /packages/linux/linux-rp-2.6.22/wm97xx-lg13-r0.patch
parent18f5c86801714259eaaa1e1a81565984f58ecd14 (diff)
linux-rp: update Tosa patchset in 2.6.22 and 2.6.23 - close #3233
USB Host patches are not updated
Diffstat (limited to 'packages/linux/linux-rp-2.6.22/wm97xx-lg13-r0.patch')
-rw-r--r--packages/linux/linux-rp-2.6.22/wm97xx-lg13-r0.patch2899
1 files changed, 2899 insertions, 0 deletions
diff --git a/packages/linux/linux-rp-2.6.22/wm97xx-lg13-r0.patch b/packages/linux/linux-rp-2.6.22/wm97xx-lg13-r0.patch
new file mode 100644
index 0000000000..c918c5daff
--- /dev/null
+++ b/packages/linux/linux-rp-2.6.22/wm97xx-lg13-r0.patch
@@ -0,0 +1,2899 @@
+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