diff options
Diffstat (limited to 'packages/linux/linux-rp-2.6.24/tosa/0068-Preliminary-tosa-denoiser.patch')
| -rw-r--r-- | packages/linux/linux-rp-2.6.24/tosa/0068-Preliminary-tosa-denoiser.patch | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/packages/linux/linux-rp-2.6.24/tosa/0068-Preliminary-tosa-denoiser.patch b/packages/linux/linux-rp-2.6.24/tosa/0068-Preliminary-tosa-denoiser.patch new file mode 100644 index 0000000000..e90e3751c0 --- /dev/null +++ b/packages/linux/linux-rp-2.6.24/tosa/0068-Preliminary-tosa-denoiser.patch @@ -0,0 +1,239 @@ +From f7dad1cd9c1bd3fce5d228e0b644a51baea50cd9 Mon Sep 17 00:00:00 2001 +From: Dmitry Baryshkov <dbaryshkov@gmail.com> +Date: Fri, 15 Feb 2008 15:35:07 +0300 +Subject: [PATCH] Preliminary tosa denoiser + +Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> +--- + drivers/input/touchscreen/Kconfig | 12 ++ + drivers/input/touchscreen/Makefile | 1 + + drivers/input/touchscreen/tosa-wm97xx.c | 182 +++++++++++++++++++++++++++++++ + 3 files changed, 195 insertions(+), 0 deletions(-) + create mode 100644 drivers/input/touchscreen/tosa-wm97xx.c + +diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig +index 0be05a2..938aed2 100644 +--- a/drivers/input/touchscreen/Kconfig ++++ b/drivers/input/touchscreen/Kconfig +@@ -210,6 +210,18 @@ config TOUCHSCREEN_WM97XX_MAINSTONE + To compile this driver as a module, choose M here: the + module will be called mainstone-wm97xx + ++config TOUCHSCREEN_WM97XX_TOSA ++ tristate "WM97xx Tosa denoiser" ++ depends on TOUCHSCREEN_WM97XX && MACH_TOSA ++ help ++ Say Y here for support for touchscreen denoising on ++ Sharl Zaurus SL-6000 (tosa) system. ++ ++ If unsure, say N ++ ++ To compile this driver as a module, choose M here: the ++ module will be called tosa-wm97xx ++ + config TOUCHSCREEN_TOUCHWIN + tristate "Touchwin serial touchscreen" + select SERIO +diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile +index d38156e..d86278b 100644 +--- a/drivers/input/touchscreen/Makefile ++++ b/drivers/input/touchscreen/Makefile +@@ -23,6 +23,7 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o + obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o + obj-$(CONFIG_TOUCHSCREEN_WM97XX) += wm97xx-ts.o + obj-$(CONFIG_TOUCHSCREEN_WM97XX_MAINSTONE) += mainstone-wm97xx.o ++obj-$(CONFIG_TOUCHSCREEN_WM97XX_TOSA) += tosa-wm97xx.o + wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9705) += wm9705.o + wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9712) += wm9712.o + wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9713) += wm9713.o +diff --git a/drivers/input/touchscreen/tosa-wm97xx.c b/drivers/input/touchscreen/tosa-wm97xx.c +new file mode 100644 +index 0000000..8fd542b +--- /dev/null ++++ b/drivers/input/touchscreen/tosa-wm97xx.c +@@ -0,0 +1,182 @@ ++/* ++ * tosa_ts.c -- Touchscreen driver for Sharp SL-6000 (Tosa). ++ * ++ * Copyright 2008 Dmitry Baryshkov ++ * Copyright 2006 Wolfson Microelectronics PLC. ++ * Author: Mike Arthur ++ * linux@wolfsonmicro.com ++ * ++ * 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 ++ * 1st Sep 2006 Initial version. ++ * ++ */ ++ ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/platform_device.h> ++#include <linux/wm97xx.h> ++#include <linux/fb.h> ++ ++#include <asm/arch/tosa.h> ++#include <asm/gpio.h> ++ ++static unsigned long hsync_time = 0; ++ ++static void calc_hsync_time(const struct fb_videomode *mode) ++{ ++ /* The 25 and 44 'magic numbers' are from Sharp's 2.4 patches */ ++ if (mode->yres == 640) { ++ hsync_time = 25; ++ } else if (mode->yres == 320) { ++ hsync_time = 44; ++ } else { ++ printk(KERN_ERR "unknown video mode res specified: %dx%d!", mode->xres, mode->yres); ++ WARN_ON(1); ++ } ++ ++ printk(KERN_ERR "tosa-wm97xx: using %lu hsync time\n", hsync_time); ++} ++ ++static int fb_notifier_callback(struct notifier_block *self, ++ unsigned long event, void *_data) ++{ ++ if (event != FB_EVENT_MODE_CHANGE && event != FB_EVENT_MODE_CHANGE_ALL) ++ return 0; ++ ++ calc_hsync_time(tosa_lcd_get_mode()); ++ ++ return 0; ++} ++ ++static void tosa_lcd_wait_hsync(void) ++{ ++ /* Waits for a rising edge on the VGA line */ ++ while (gpio_get_value(TOSA_GPIO_VGA_LINE) == 0); ++ while (gpio_get_value(TOSA_GPIO_VGA_LINE) != 0); ++} ++ ++/* Taken from the Sharp 2.4 kernel code */ ++#define CCNT(a) asm volatile ("mrc p14, 0, %0, C1, C1, 0" : "=r"(a)) ++#define CCNT_ON() asm("mcr p14, 0, %0, C0, C0, 0" : : "r"(1)) ++#define CCNT_OFF() asm("mcr p14, 0, %0, C0, C0, 0" : : "r"(0)) ++ ++/* On the Sharp SL-6000 (Tosa), due to a noisy LCD, we need to perform a wait ++ * before sampling the Y axis of the touchscreen */ ++static void tosa_lcd_sync_on(int adcsel) ++{ ++ unsigned long timer1 = 0, timer2 = 0, wait_time = 0; ++ if (adcsel & WM97XX_ADCSEL_Y) { ++ CCNT_ON(); ++ wait_time = hsync_time; ++ ++ if (wait_time) { ++ ++ /* wait for LCD rising edge */ ++ tosa_lcd_wait_hsync(); ++ /* get clock */ ++ CCNT(timer1); ++ CCNT(timer2); ++ ++ while ((timer2 - timer1) < wait_time) { ++ CCNT(timer2); ++ } ++ } ++ } ++} ++ ++static void tosa_lcd_sync_off(int adcsel) ++{ ++ if (adcsel & WM97XX_ADCSEL_Y) ++ CCNT_OFF(); ++} ++ ++static struct wm97xx_mach_ops tosa_mach_ops = { ++ .pre_sample = tosa_lcd_sync_on, ++ .post_sample = tosa_lcd_sync_off, ++}; ++ ++static int __devinit tosa_ts_probe(struct platform_device *dev) { ++ struct wm97xx *wm = platform_get_drvdata(dev); ++ struct notifier_block *notif; ++ int err = -ENOMEM; ++ ++ notif = kzalloc(sizeof(struct notifier_block), GFP_KERNEL); ++ if (!notif) ++ goto err_alloc; ++ ++ notif->notifier_call = fb_notifier_callback; ++ ++ err = gpio_request(TOSA_GPIO_VGA_LINE, "hsync"); ++ if (err) ++ goto err_gpio; ++ ++ err = gpio_direction_input(TOSA_GPIO_VGA_LINE); ++ if (err) ++ goto err_gpio; ++ ++ platform_set_drvdata(dev, notif); ++ ++ err = fb_register_client(notif); ++ if (err) ++ goto err_register; ++ ++ err = wm97xx_register_mach_ops(wm, &tosa_mach_ops); ++ if (err) ++ goto err_wm97xx; ++ ++ calc_hsync_time(tosa_lcd_get_mode()); ++ ++ return 0; ++ ++err_wm97xx: ++ fb_unregister_client(notif); ++err_register: ++ gpio_free(TOSA_GPIO_VGA_LINE); ++err_gpio: ++ kfree(notif); ++err_alloc: ++ return err; ++} ++ ++ ++static int __devexit tosa_ts_remove(struct platform_device *dev) { ++ struct wm97xx *wm = platform_get_drvdata(dev); ++ ++ wm97xx_unregister_mach_ops(wm); ++ ++ fb_unregister_client(platform_get_drvdata(dev)); ++ gpio_free(TOSA_GPIO_VGA_LINE); ++ kfree(platform_get_drvdata(dev)); ++ ++ return 0; ++} ++ ++static struct platform_driver tosa_ts_driver = { ++ .driver.name = "wm97xx-touch", ++ .driver.owner = THIS_MODULE, ++ .probe = tosa_ts_probe, ++ .remove = __devexit_p(tosa_ts_remove), ++}; ++ ++static int __init tosa_ts_init(void) ++{ ++ return platform_driver_register(&tosa_ts_driver); ++} ++ ++static void __exit tosa_ts_exit(void) ++{ ++ platform_driver_unregister(&tosa_ts_driver); ++} ++ ++module_init(tosa_ts_init); ++module_exit(tosa_ts_exit); ++ ++/* Module information */ ++MODULE_AUTHOR("Dmitry Baryshkov, Mike Arthur, mike@mikearthur.co.uk, www.wolfsonmicro.com"); ++MODULE_DESCRIPTION("Sharp SL6000 Tosa Touch Screen Denoiser"); ++MODULE_LICENSE("GPL"); +-- +1.5.4.1 + |