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path: root/packages/kexecboot/linux-kexecboot-2.6.23/tosa-lcdnoise-r1-fix-r0.patch
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From eada869814636157956641ba1503f0d6cc04e2b7 Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dbaryshkov@gmail.com>
Date: Fri, 19 Oct 2007 17:43:51 +0400
Subject: [PATCH] tosa-lcdnoise-r1.patch fixes

---
 arch/arm/mach-pxa/tosa_lcd.c        |   34 ++++++++++++++++++++++++++++++++++
 drivers/input/touchscreen/tosa_ts.c |    9 +--------
 include/asm-arm/arch-pxa/tosa.h     |    5 +++++
 3 files changed, 40 insertions(+), 8 deletions(-)

diff --git a/arch/arm/mach-pxa/tosa_lcd.c b/arch/arm/mach-pxa/tosa_lcd.c
index d52f63f..447ca86 100644
--- a/arch/arm/mach-pxa/tosa_lcd.c
+++ b/arch/arm/mach-pxa/tosa_lcd.c
@@ -59,6 +59,8 @@ static int bl_intensity;
 static struct ssp_dev tosa_nssp_dev;
 static struct ssp_state tosa_nssp_state;
 static spinlock_t tosa_nssp_lock;
+static int blanked;
+static unsigned long hsync_time;
 
 static unsigned short normal_i2c[] = {
 	DAC_BASE,
@@ -130,6 +132,17 @@ static void tosa_lcd_tg_init(struct device *dev)
 	pxa_nssp_output(TG_GPOSR,0x02);		/* GPOS0=powercontrol, GPOS1=GPIO, GPOS2=TCTL */
 }
 
+static unsigned long 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) {
+        return 25;
+    }
+    if (mode->yres == 320) {
+        return 44;
+    }
+    return 0;
+}
+
 static void tosa_lcd_tg_on(struct device *dev, const struct fb_videomode *mode)
 {
 	const int value = TG_REG0_COLOR | TG_REG0_UD | TG_REG0_LR;
@@ -154,6 +167,8 @@ static void tosa_lcd_tg_on(struct device *dev, const struct fb_videomode *mode)
 		/* set common voltage */
 		i2c_smbus_write_byte_data(tosa_i2c_dac, DAC_CH1, comadj);
 
+    blanked = 0;
+    hsync_time = calc_hsync_time(mode);
 }
 
 static void tosa_lcd_tg_off(struct device *dev)
@@ -172,6 +187,8 @@ static void tosa_lcd_tg_off(struct device *dev)
 	
 	/* L3V Off */
 	reset_scoop_gpio( &tosascoop_jc_device.dev,TOSA_SCOOP_JC_TC3693_L3V_ON); 
+
+    blanked = 1;
 }
 
 static int tosa_detect_client(struct i2c_adapter* adapter, int address, int kind) {
@@ -238,6 +255,23 @@ static int tosa_detach_client(struct i2c_client* client) {
 	return 0;
 }
 
+unsigned long tosa_lcd_get_hsync_time(void)
+{
+/* This method should eventually contain the correct algorithm for calculating
+   the hsync_time */
+    if (blanked)
+        return 0;
+    else
+        return hsync_time;
+}
+
+void tosa_lcd_wait_hsync(void)
+{
+    /* Waits for a rising edge on the VGA line */
+    while((GPLR(TOSA_GPIO_VGA_LINE) & GPIO_bit(TOSA_GPIO_VGA_LINE)) == 0);
+    while((GPLR(TOSA_GPIO_VGA_LINE) & GPIO_bit(TOSA_GPIO_VGA_LINE)) != 0);
+}
+
 static struct i2c_driver tosa_driver={
 	.id		= TOSA_LCD_I2C_DEVICEID,
 	.attach_adapter	= tosa_attach_adapter,
diff --git a/drivers/input/touchscreen/tosa_ts.c b/drivers/input/touchscreen/tosa_ts.c
index bc733e9..134f8ce 100644
--- a/drivers/input/touchscreen/tosa_ts.c
+++ b/drivers/input/touchscreen/tosa_ts.c
@@ -25,13 +25,6 @@
 #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))
 
-static inline void tosa_lcd_wait_hsync(void)
-{
-	/* Waits for a rising edge on the VGA line */
-	while((GPLR(TOSA_GPIO_VGA_LINE) & GPIO_bit(TOSA_GPIO_VGA_LINE)) == 0);
-	while((GPLR(TOSA_GPIO_VGA_LINE) & GPIO_bit(TOSA_GPIO_VGA_LINE)) != 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 */
 void tosa_lcd_sync_on(int adcsel) {
@@ -54,7 +47,7 @@ void tosa_lcd_sync_on(int adcsel) {
 	}
 }
 
-void tosa_lcd_sync_off(void) {
+void tosa_lcd_sync_off(int adcsel) {
 	CCNT_OFF();
 }
 
diff --git a/include/asm-arm/arch-pxa/tosa.h b/include/asm-arm/arch-pxa/tosa.h
index ce7322d..7f446fd 100644
--- a/include/asm-arm/arch-pxa/tosa.h
+++ b/include/asm-arm/arch-pxa/tosa.h
@@ -1,6 +1,7 @@
 /*
  * Hardware specific definitions for Sharp SL-C6000x series of PDAs
  *
+ * Copyright (c) 2006 Wolfson Microelectronics PLC.
  * Copyright (c) 2005 Dirk Opfer
  *
  * Based on Sharp's 2.4 kernel patches
@@ -187,4 +188,8 @@
 extern struct platform_device tosascoop_jc_device;
 extern struct platform_device tosascoop_device;
 extern struct platform_device tc6393_device;
+
+unsigned long tosa_lcd_get_hsync_time(void);
+void tosa_lcd_wait_hsync(void);
+
 #endif /* _ASM_ARCH_TOSA_H_ */
-- 
1.4.4.4