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Diffstat (limited to 'recipes/kexecboot/linux-kexecboot-2.6.24/tosa/0034-Driver-for-WM97xx-touchscreens-in-streaming-mode-on.patch')
-rw-r--r--recipes/kexecboot/linux-kexecboot-2.6.24/tosa/0034-Driver-for-WM97xx-touchscreens-in-streaming-mode-on.patch329
1 files changed, 329 insertions, 0 deletions
diff --git a/recipes/kexecboot/linux-kexecboot-2.6.24/tosa/0034-Driver-for-WM97xx-touchscreens-in-streaming-mode-on.patch b/recipes/kexecboot/linux-kexecboot-2.6.24/tosa/0034-Driver-for-WM97xx-touchscreens-in-streaming-mode-on.patch
new file mode 100644
index 0000000000..0391cfcd83
--- /dev/null
+++ b/recipes/kexecboot/linux-kexecboot-2.6.24/tosa/0034-Driver-for-WM97xx-touchscreens-in-streaming-mode-on.patch
@@ -0,0 +1,329 @@
+From 821604bad5ce1ef942eeb420afd9ea2c5c92875e Mon Sep 17 00:00:00 2001
+From: Mark Brown <broonie@opensource.wolfsonmicro.com>
+Date: Sat, 26 Jan 2008 21:14:19 +0300
+Subject: [PATCH 34/64] Driver for WM97xx touchscreens in streaming mode on Mainstone
+
+Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
+Signed-off-by: Graeme Gregory <gg@opensource.wolfsonmicro.com>
+Signed-off-by: Mike Arthur <mike.arthur@wolfsonmicro.com>
+Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
+Cc: Dmitry Baryshkov <dbaryshkov@gmail.com>
+Cc: Stanley Cai <stanley.cai@intel.com>
+Cc: Rodolfo Giometti <giometti@enneenne.com>
+Cc: Russell King <rmk@arm.linux.org.uk>
+Cc: Marc Kleine-Budde <mkl@pengutronix.de>
+Cc: Ian Molton <spyro@f2s.com>
+Cc: Vince Sanders <vince@kyllikki.org>
+Cc: Andrew Zabolotny <zap@homelink.ru>
+---
+ drivers/input/touchscreen/mainstone-wm97xx.c | 298 ++++++++++++++++++++++++++
+ 1 files changed, 298 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/input/touchscreen/mainstone-wm97xx.c
+
+diff --git a/drivers/input/touchscreen/mainstone-wm97xx.c b/drivers/input/touchscreen/mainstone-wm97xx.c
+new file mode 100644
+index 0000000..8e1c35d
+--- /dev/null
++++ b/drivers/input/touchscreen/mainstone-wm97xx.c
+@@ -0,0 +1,298 @@
++/*
++ * mainstone-wm97xx.c -- Mainstone Continuous Touch screen driver for
++ * Wolfson WM97xx AC97 Codecs.
++ *
++ * Copyright 2004, 2007 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
++ *
++ */
++
++#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/interrupt.h>
++#include <linux/wm97xx.h>
++#include <linux/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;
++static u16 last, tries;
++
++/*
++ * 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;
++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;
++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
++static void wm97xx_acc_pen_up(struct wm97xx *wm)
++{
++ set_current_state(TASK_INTERRUPTIBLE);
++ schedule_timeout(1);
++
++ while (MISR & (1 << 2))
++ MODR;
++}
++#else
++static 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
++
++static 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;
++ 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;
++}
++
++static 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;
++ dev_info(wm->dev,
++ "mainstone 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:
++ dev_err(wm->dev,
++ "pen down irq not supported on this device\n");
++ pen_int = 0;
++ break;
++ }
++ }
++
++ return 0;
++}
++
++static 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 void wm97xx_irq_enable(struct wm97xx *wm, int enable)
++{
++ if (enable)
++ enable_irq(wm->pen_irq);
++ else
++ disable_irq(wm->pen_irq);
++}
++
++static struct wm97xx_mach_ops mainstone_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,
++ .irq_enable = wm97xx_irq_enable,
++};
++
++static int mainstone_wm97xx_probe(struct platform_device *pdev)
++{
++ struct wm97xx *wm = platform_get_drvdata(pdev);
++ return wm97xx_register_mach_ops(wm, &mainstone_mach_ops);
++}
++
++static int mainstone_wm97xx_remove(struct platform_device *pdev)
++{
++ struct wm97xx *wm = platform_get_drvdata(pdev);
++ wm97xx_unregister_mach_ops(wm);
++ return 0;
++}
++
++static struct platform_driver mainstone_wm97xx_driver = {
++ .probe = mainstone_wm97xx_probe,
++ .remove = mainstone_wm97xx_remove,
++ .driver = {
++ .name = "wm97xx-touch",
++ },
++};
++
++static int __init mainstone_wm97xx_init(void)
++{
++ return platform_driver_register(&mainstone_wm97xx_driver);
++}
++
++static void __exit mainstone_wm97xx_exit(void)
++{
++ platform_driver_unregister(&mainstone_wm97xx_driver);
++}
++
++module_init(mainstone_wm97xx_init);
++module_exit(mainstone_wm97xx_exit);
++
++/* Module information */
++MODULE_AUTHOR("Liam Girdwood <liam.girdwood@wolfsonmicro.com>");
++MODULE_DESCRIPTION("wm97xx continuous touch driver for mainstone");
++MODULE_LICENSE("GPL");
+--
+1.5.3.8
+
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