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path: root/meta/packages/linux/linux-rp-2.6.23/wm97xx-lcdnoise-r0.patch
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Diffstat (limited to 'meta/packages/linux/linux-rp-2.6.23/wm97xx-lcdnoise-r0.patch')
-rw-r--r--meta/packages/linux/linux-rp-2.6.23/wm97xx-lcdnoise-r0.patch208
1 files changed, 208 insertions, 0 deletions
diff --git a/meta/packages/linux/linux-rp-2.6.23/wm97xx-lcdnoise-r0.patch b/meta/packages/linux/linux-rp-2.6.23/wm97xx-lcdnoise-r0.patch
new file mode 100644
index 0000000000..191de3af22
--- /dev/null
+++ b/meta/packages/linux/linux-rp-2.6.23/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
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 21:41:49 +0000