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-rw-r--r--meta/packages/linux/linux-rp-2.6.19+2.6.20-rc4/wm97xx-lcdnoise-r0.patch208
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 0000000000..191de3af22
--- /dev/null
+++ b/meta/packages/linux/linux-rp-2.6.19+2.6.20-rc4/wm97xx-lcdnoise-r0.patch
@@ -0,0 +1,208 @@
1Index: linux-tosa/drivers/input/touchscreen/wm9712.c
2===================================================================
3--- linux-tosa.orig/drivers/input/touchscreen/wm9712.c 2006-08-29 16:52:36.008543280 +0100
4+++ linux-tosa/drivers/input/touchscreen/wm9712.c 2006-08-29 16:52:50.923275896 +0100
5@@ -1,7 +1,7 @@
6 /*
7 * wm9712.c -- Codec driver for Wolfson WM9712 AC97 Codecs.
8 *
9- * Copyright 2003, 2004, 2005 Wolfson Microelectronics PLC.
10+ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC.
11 * Author: Liam Girdwood
12 * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
13 * Parts Copyright : Ian Molton <spyro@f2s.com>
14@@ -13,6 +13,12 @@
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18+ * Revision history
19+ * 4th Jul 2005 Initial version.
20+ * 29th Aug 2006 Mike Arthur <mike@mikearthur.co.uk>
21+ * Added fixes for Sharp SL-6000 (Tosa) LCD noise causing
22+ * touchscreen interference.
23+ *
24 */
25
26 #include <linux/module.h>
27@@ -28,6 +34,10 @@
28 #define WM9705_VERSION "0.60"
29 #define DEFAULT_PRESSURE 0xb0c0
30
31+#define CCNT(a) asm volatile ("mrc p14, 0, %0, C1, C1, 0" : "=r"(a))
32+#define CCNT_ON() asm("mcr p14, 0, %0, C0, C0, 0" : : "r"(1))
33+#define CCNT_OFF() asm("mcr p14, 0, %0, C0, C0, 0" : : "r"(1))
34+
35 /*
36 * Debug
37 */
38@@ -243,6 +253,36 @@
39 return wm->dig[2] & WM9712_PDEN;
40 }
41
42+
43+#ifdef CONFIG_MACH_TOSA
44+/* On the Sharp SL-6000 (Tosa), due to a noisy LCD, we need to perform a wait
45+ * before sampling the Y axis of the touchscreen */
46+static inline void wm9712_lcd_sync_on(struct wm97xx* wm, int adcsel) {
47+ unsigned long timer1 = 0, timer2 = 0, wait_time = 0;
48+ if (adcsel == WM97XX_ADCSEL_Y) {
49+ wait_time = wm97xx_calc_lcd_waittime(wm);
50+
51+ CCNT_ON();
52+
53+ if (wait_time) {
54+ /* wait for LCD rising edge */
55+ wm_machinfo->wait_hsync();
56+ /* get clock */
57+ CCNT(timer1);
58+ CCNT(timer2);
59+
60+ while ((timer2 - timer1) < wait_time) {
61+ CCNT(timer2);
62+ }
63+ }
64+ }
65+}
66+
67+static inline void wm9712_lcd_sync_off(void) {
68+ CCNT_OFF();
69+}
70+#endif
71+
72 /*
73 * Read a sample from the WM9712 adc in polling mode.
74 */
75@@ -260,6 +300,9 @@
76 /* set up digitiser */
77 if (adcsel & 0x8000)
78 adcsel = ((adcsel & 0x7fff) + 3) << 12;
79+ #ifdef CONFIG_MACH_TOSA
80+ wm9712_lcd_sync_on(wm, adcsel);
81+ #endif
82 wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1, adcsel | WM97XX_POLL | WM97XX_DELAY(delay));
83
84 /* wait 3 AC97 time slots + delay for conversion */
85@@ -282,6 +325,10 @@
86
87 *sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
88
89+ #ifdef CONFIG_MACH_TOSA
90+ wm9712_lcd_sync_off();
91+ #endif
92+
93 /* check we have correct sample */
94 if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) {
95 dbg ("adc wrong sample, read %x got %x", adcsel,
96@@ -303,11 +350,12 @@
97 static int wm9712_poll_touch(struct wm97xx* wm, struct wm97xx_data *data)
98 {
99 int rc;
100-
101 if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_X, &data->x)) != RC_VALID)
102 return rc;
103+
104 if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_Y, &data->y)) != RC_VALID)
105 return rc;
106+
107 if (pil && !five_wire) {
108 if ((rc = wm9712_poll_sample(wm, WM97XX_ADCSEL_PRES, &data->p)) != RC_VALID)
109 return rc;
110Index: linux-tosa/drivers/input/touchscreen/wm97xx-core.c
111===================================================================
112--- linux-tosa.orig/drivers/input/touchscreen/wm97xx-core.c 2006-08-29 16:52:36.008543280 +0100
113+++ linux-tosa/drivers/input/touchscreen/wm97xx-core.c 2006-08-29 16:52:50.924275744 +0100
114@@ -2,7 +2,7 @@
115 * wm97xx-core.c -- Touch screen driver core for Wolfson WM9705, WM9712
116 * and WM9713 AC97 Codecs.
117 *
118- * Copyright 2003, 2004, 2005 Wolfson Microelectronics PLC.
119+ * Copyright 2003, 2004, 2005, 2006 Wolfson Microelectronics PLC.
120 * Author: Liam Girdwood
121 * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
122 * Parts Copyright : Ian Molton <spyro@f2s.com>
123@@ -67,6 +67,9 @@
124 * GPIOs) and 2.6 power management.
125 * 29th Nov 2004 Added WM9713 support.
126 * 4th Jul 2005 Moved codec specific code out to seperate files.
127+ * 29th Aug 2006 Mike Arthur <mike@mikearthur.co.uk>
128+ * Added fixes for Sharp SL-6000 (Tosa) LCD noise causing
129+ * touchscreen interference.
130 */
131
132 #include <linux/module.h>
133@@ -94,6 +97,7 @@
134 static DECLARE_MUTEX(gpio_sem);
135 static LIST_HEAD(wm97xx_misc_list);
136 static struct wm97xx* wm_codec = NULL;
137+struct wm97xx_machinfo *wm_machinfo;
138
139 /*
140 * WM97xx - enable/disable AUX ADC sysfs
141@@ -832,6 +836,23 @@
142 mdev->remove(wm_codec);
143 }
144
145+#ifdef CONFIG_MACH_TOSA
146+/* On the Sharp SL-6000 (Tosa), due to a noisy LCD, we need to perform a wait
147+ * before sampling the Y axis of the touchscreen */
148+unsigned long wm97xx_calc_lcd_waittime(struct wm97xx *wm) {
149+ unsigned long hsync_time = wm_machinfo->get_hsync_time();
150+ return hsync_time;
151+}
152+
153+void wm97xx_set_machinfo(struct wm97xx_machinfo *machinfo) {
154+ wm_machinfo = machinfo;
155+}
156+
157+void wm97xx_unset_machinfo() {
158+ wm_machinfo = NULL;
159+}
160+#endif
161+
162 static struct device_driver wm97xx_driver = {
163 .name = "ac97",
164 .bus = &ac97_bus_type,
165@@ -861,6 +882,9 @@
166 EXPORT_SYMBOL_GPL(wm97xx_reg_write);
167 EXPORT_SYMBOL_GPL(wm97xx_register_misc_dev);
168 EXPORT_SYMBOL_GPL(wm97xx_unregister_misc_dev);
169+EXPORT_SYMBOL_GPL(wm97xx_calc_lcd_waittime);
170+EXPORT_SYMBOL_GPL(wm97xx_set_machinfo);
171+EXPORT_SYMBOL_GPL(wm97xx_unset_machinfo);
172
173 module_init(wm97xx_init);
174 module_exit(wm97xx_exit);
175Index: linux-tosa/include/linux/wm97xx.h
176===================================================================
177--- linux-tosa.orig/include/linux/wm97xx.h 2006-08-29 16:52:36.008543280 +0100
178+++ linux-tosa/include/linux/wm97xx.h 2006-08-29 16:52:50.924275744 +0100
179@@ -207,6 +207,7 @@
180
181 struct wm97xx;
182 extern struct wm97xx_codec_drv wm97xx_codec;
183+extern struct wm97xx_machinfo *wm_machinfo;
184
185 /*
186 * Codec driver interface - allows mapping to WM9705/12/13 and newer codecs
187@@ -253,6 +254,11 @@
188 struct list_head list;
189 };
190
191+struct wm97xx_machinfo {
192+ unsigned long (*get_hsync_time)(void);
193+ void (*wait_hsync)(void);
194+};
195+
196 int wm97xx_register_misc_dev(struct wm97xx_misc_dev* mdev);
197 void wm97xx_unregister_misc_dev(struct wm97xx_misc_dev* mdev);
198
199@@ -281,4 +287,9 @@
200 int wm97xx_acc_startup(struct wm97xx* wm);
201 void wm97xx_acc_shutdown(struct wm97xx* wm);
202
203+
204+unsigned long wm97xx_calc_lcd_waittime(struct wm97xx *wm);
205+void wm97xx_set_machinfo(struct wm97xx_machinfo *machinfo);
206+void wm97xx_unset_machinfo(void);
207+
208 #endif
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-05-02 23:18:30 +0000