diff options
Diffstat (limited to 'meta/packages/linux/linux-rp-2.6.19+2.6.20-rc4/wm97xx-lcdnoise-r0.patch')
-rw-r--r-- | meta/packages/linux/linux-rp-2.6.19+2.6.20-rc4/wm97xx-lcdnoise-r0.patch | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/meta/packages/linux/linux-rp-2.6.19+2.6.20-rc4/wm97xx-lcdnoise-r0.patch b/meta/packages/linux/linux-rp-2.6.19+2.6.20-rc4/wm97xx-lcdnoise-r0.patch new file mode 100644 index 000000000..191de3af2 --- /dev/null +++ b/meta/packages/linux/linux-rp-2.6.19+2.6.20-rc4/wm97xx-lcdnoise-r0.patch @@ -0,0 +1,208 @@ +Index: linux-tosa/drivers/input/touchscreen/wm9712.c +=================================================================== +--- linux-tosa.orig/drivers/input/touchscreen/wm9712.c 2006-08-29 16:52:36.008543280 +0100 ++++ linux-tosa/drivers/input/touchscreen/wm9712.c 2006-08-29 16:52:50.923275896 +0100 +@@ -1,7 +1,7 @@ + /* + * wm9712.c -- Codec driver for Wolfson WM9712 AC97 Codecs. + * +- * Copyright 2003, 2004, 2005 Wolfson Microelectronics PLC. ++ * 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> +@@ -13,6 +13,12 @@ + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * ++ * Revision history ++ * 4th Jul 2005 Initial version. ++ * 29th Aug 2006 Mike Arthur <mike@mikearthur.co.uk> ++ * Added fixes for Sharp SL-6000 (Tosa) LCD noise causing ++ * touchscreen interference. ++ * + */ + + #include <linux/module.h> +@@ -28,6 +34,10 @@ + #define WM9705_VERSION "0.60" + #define DEFAULT_PRESSURE 0xb0c0 + ++#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"(1)) ++ + /* + * Debug + */ +@@ -243,6 +253,36 @@ + return wm->dig[2] & WM9712_PDEN; + } + ++ ++#ifdef CONFIG_MACH_TOSA ++/* 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 inline void wm9712_lcd_sync_on(struct wm97xx* wm, int adcsel) { ++ unsigned long timer1 = 0, timer2 = 0, wait_time = 0; ++ if (adcsel == WM97XX_ADCSEL_Y) { ++ wait_time = wm97xx_calc_lcd_waittime(wm); ++ ++ CCNT_ON(); ++ ++ if (wait_time) { ++ /* wait for LCD rising edge */ ++ wm_machinfo->wait_hsync(); ++ /* get clock */ ++ CCNT(timer1); ++ CCNT(timer2); ++ ++ while ((timer2 - timer1) < wait_time) { ++ CCNT(timer2); ++ } ++ } ++ } ++} ++ ++static inline void wm9712_lcd_sync_off(void) { ++ CCNT_OFF(); ++} ++#endif ++ + /* + * Read a sample from the WM9712 adc in polling mode. + */ +@@ -260,6 +300,9 @@ + /* set up digitiser */ + if (adcsel & 0x8000) + adcsel = ((adcsel & 0x7fff) + 3) << 12; ++ #ifdef CONFIG_MACH_TOSA ++ wm9712_lcd_sync_on(wm, adcsel); ++ #endif + wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, adcsel | WM97XX_POLL | WM97XX_DELAY(delay)); + + /* wait 3 AC97 time slots + delay for conversion */ +@@ -282,6 +325,10 @@ + + *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD); + ++ #ifdef CONFIG_MACH_TOSA ++ wm9712_lcd_sync_off(); ++ #endif ++ + /* check we have correct sample */ + if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) { + dbg ("adc wrong sample, read %x got %x", adcsel, +@@ -303,11 +350,12 @@ + static int wm9712_poll_touch(struct wm97xx* wm, struct wm97xx_data *data) + { + int rc; +- + 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; +Index: linux-tosa/drivers/input/touchscreen/wm97xx-core.c +=================================================================== +--- linux-tosa.orig/drivers/input/touchscreen/wm97xx-core.c 2006-08-29 16:52:36.008543280 +0100 ++++ linux-tosa/drivers/input/touchscreen/wm97xx-core.c 2006-08-29 16:52:50.924275744 +0100 +@@ -2,7 +2,7 @@ + * wm97xx-core.c -- Touch screen driver core for Wolfson WM9705, WM9712 + * and WM9713 AC97 Codecs. + * +- * Copyright 2003, 2004, 2005 Wolfson Microelectronics PLC. ++ * 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> +@@ -67,6 +67,9 @@ + * GPIOs) and 2.6 power management. + * 29th Nov 2004 Added WM9713 support. + * 4th Jul 2005 Moved codec specific code out to seperate files. ++ * 29th Aug 2006 Mike Arthur <mike@mikearthur.co.uk> ++ * Added fixes for Sharp SL-6000 (Tosa) LCD noise causing ++ * touchscreen interference. + */ + + #include <linux/module.h> +@@ -94,6 +97,7 @@ + static DECLARE_MUTEX(gpio_sem); + static LIST_HEAD(wm97xx_misc_list); + static struct wm97xx* wm_codec = NULL; ++struct wm97xx_machinfo *wm_machinfo; + + /* + * WM97xx - enable/disable AUX ADC sysfs +@@ -832,6 +836,23 @@ + mdev->remove(wm_codec); + } + ++#ifdef CONFIG_MACH_TOSA ++/* 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 */ ++unsigned long wm97xx_calc_lcd_waittime(struct wm97xx *wm) { ++ unsigned long hsync_time = wm_machinfo->get_hsync_time(); ++ return hsync_time; ++} ++ ++void wm97xx_set_machinfo(struct wm97xx_machinfo *machinfo) { ++ wm_machinfo = machinfo; ++} ++ ++void wm97xx_unset_machinfo() { ++ wm_machinfo = NULL; ++} ++#endif ++ + static struct device_driver wm97xx_driver = { + .name = "ac97", + .bus = &ac97_bus_type, +@@ -861,6 +882,9 @@ + EXPORT_SYMBOL_GPL(wm97xx_reg_write); + EXPORT_SYMBOL_GPL(wm97xx_register_misc_dev); + EXPORT_SYMBOL_GPL(wm97xx_unregister_misc_dev); ++EXPORT_SYMBOL_GPL(wm97xx_calc_lcd_waittime); ++EXPORT_SYMBOL_GPL(wm97xx_set_machinfo); ++EXPORT_SYMBOL_GPL(wm97xx_unset_machinfo); + + module_init(wm97xx_init); + module_exit(wm97xx_exit); +Index: linux-tosa/include/linux/wm97xx.h +=================================================================== +--- linux-tosa.orig/include/linux/wm97xx.h 2006-08-29 16:52:36.008543280 +0100 ++++ linux-tosa/include/linux/wm97xx.h 2006-08-29 16:52:50.924275744 +0100 +@@ -207,6 +207,7 @@ + + struct wm97xx; + extern struct wm97xx_codec_drv wm97xx_codec; ++extern struct wm97xx_machinfo *wm_machinfo; + + /* + * Codec driver interface - allows mapping to WM9705/12/13 and newer codecs +@@ -253,6 +254,11 @@ + struct list_head list; + }; + ++struct wm97xx_machinfo { ++ unsigned long (*get_hsync_time)(void); ++ void (*wait_hsync)(void); ++}; ++ + int wm97xx_register_misc_dev(struct wm97xx_misc_dev* mdev); + void wm97xx_unregister_misc_dev(struct wm97xx_misc_dev* mdev); + +@@ -281,4 +287,9 @@ + int wm97xx_acc_startup(struct wm97xx* wm); + void wm97xx_acc_shutdown(struct wm97xx* wm); + ++ ++unsigned long wm97xx_calc_lcd_waittime(struct wm97xx *wm); ++void wm97xx_set_machinfo(struct wm97xx_machinfo *machinfo); ++void wm97xx_unset_machinfo(void); ++ + #endif |