From 9fc7896b62b48714fafecf9266d9dc14c1cd6e33 Mon Sep 17 00:00:00 2001
From: Richard Purdie <rpurdie@rpsys.net>
Date: Tue, 13 Sep 2005 01:25:32 -0700
Subject: [PATCH] [PATCH] SharpSL: Add cxx00 support to the Corgi LCD driver

The same LCD is present on both the Sharp Zaurus c7x0 series and the cxx00 but
with different framebuffer drivers (w100fb vs.  pxafb).  This patch adds
support for the cxx00 series to the LCD driver.  It also adds some LCD to
touchscreen interface logic needed by the touchscreen driver to prevent
interference problems, the idea being to keep all the ugly code in one place
leaving the drivers themselves clean.  sharpsl.h is used to provide the
abstraction.

Signed-Off-by: Richard Purdie <rpurdie@rpsys.net>
Cc: Vojtech Pavlik <vojtech@suse.cz>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 arch/arm/mach-pxa/corgi_lcd.c      | 132 ++++++++++++++++++++++++++---
 arch/arm/mach-pxa/sharpsl.h        |  11 +++
 include/asm-arm/arch-pxa/sharpsl.h |  10 +++
 3 files changed, 139 insertions(+), 14 deletions(-)

diff --git a/arch/arm/mach-pxa/corgi_lcd.c b/arch/arm/mach-pxa/corgi_lcd.c
index deac29c002..bfe5efc11b 100644
--- a/arch/arm/mach-pxa/corgi_lcd.c
+++ b/arch/arm/mach-pxa/corgi_lcd.c
@@ -1,10 +1,14 @@
 /*
  * linux/drivers/video/w100fb.c
  *
- * Corgi LCD Specific Code for ATI Imageon w100 (Wallaby)
+ * Corgi/Spitz LCD Specific Code
  *
  * Copyright (C) 2005 Richard Purdie
  *
+ * Connectivity:
+ *   Corgi - LCD to ATI Imageon w100 (Wallaby)
+ *   Spitz - LCD to PXA Framebuffer
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
@@ -14,9 +18,17 @@
 #include <linux/delay.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
+#include <linux/module.h>
+#include <asm/mach-types.h>
+#include <asm/arch/akita.h>
 #include <asm/arch/corgi.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/sharpsl.h>
+#include <asm/arch/spitz.h>
+#include <asm/hardware/scoop.h>
 #include <asm/mach/sharpsl_param.h>
-#include <video/w100fb.h>
+#include "generic.h"
 
 /* Register Addresses */
 #define RESCTL_ADRS     0x00
@@ -134,10 +146,10 @@ static void lcdtg_set_common_voltage(u8 base_data, u8 data)
 }
 
 /* Set Phase Adjuct */
-static void lcdtg_set_phadadj(struct w100fb_par *par)
+static void lcdtg_set_phadadj(int mode)
 {
 	int adj;
-	switch(par->xres) {
+	switch(mode) {
 		case 480:
 		case 640:
 			/* Setting for VGA */
@@ -161,7 +173,7 @@ static void lcdtg_set_phadadj(struct w100fb_par *par)
 
 static int lcd_inited;
 
-static void lcdtg_hw_init(struct w100fb_par *par)
+static void lcdtg_hw_init(int mode)
 {
 	if (!lcd_inited) {
 		int comadj;
@@ -215,7 +227,7 @@ static void lcdtg_hw_init(struct w100fb_par *par)
 		corgi_ssp_lcdtg_send(PICTRL_ADRS, 0);
 
 		/* Set Phase Adjuct */
-		lcdtg_set_phadadj(par);
+		lcdtg_set_phadadj(mode);
 
 		/* Initialize for Input Signals from ATI */
 		corgi_ssp_lcdtg_send(POLCTRL_ADRS, POLCTRL_SYNC_POL_RISE | POLCTRL_EN_POL_RISE
@@ -224,10 +236,10 @@ static void lcdtg_hw_init(struct w100fb_par *par)
 
 		lcd_inited=1;
 	} else {
-		lcdtg_set_phadadj(par);
+		lcdtg_set_phadadj(mode);
 	}
 
-	switch(par->xres) {
+	switch(mode) {
 		case 480:
 		case 640:
 			/* Set Lcd Resolution (VGA) */
@@ -242,7 +254,7 @@ static void lcdtg_hw_init(struct w100fb_par *par)
 	}
 }
 
-static void lcdtg_suspend(struct w100fb_par *par)
+static void lcdtg_suspend(void)
 {
 	/* 60Hz x 2 frame = 16.7msec x 2 = 33.4 msec */
 	mdelay(34);
@@ -276,15 +288,30 @@ static void lcdtg_suspend(struct w100fb_par *par)
 	lcd_inited = 0;
 }
 
-static struct w100_tg_info corgi_lcdtg_info = {
-	.change=lcdtg_hw_init,
-	.suspend=lcdtg_suspend,
-	.resume=lcdtg_hw_init,
-};
 
 /*
  * Corgi w100 Frame Buffer Device
  */
+#ifdef CONFIG_PXA_SHARP_C7xx
+
+#include <video/w100fb.h>
+
+static void w100_lcdtg_suspend(struct w100fb_par *par)
+{
+	lcdtg_suspend();
+}
+
+static void w100_lcdtg_init(struct w100fb_par *par)
+{
+	lcdtg_hw_init(par->xres);
+}
+
+
+static struct w100_tg_info corgi_lcdtg_info = {
+	.change  = w100_lcdtg_init,
+	.suspend = w100_lcdtg_suspend,
+	.resume  = w100_lcdtg_init,
+};
 
 static struct w100_mem_info corgi_fb_mem = {
 	.ext_cntl          = 0x00040003,
@@ -394,3 +421,80 @@ struct platform_device corgifb_device = {
 	},
 
 };
+#endif
+
+
+/*
+ * Spitz PXA Frame Buffer Device
+ */
+#ifdef CONFIG_PXA_SHARP_Cxx00
+
+#include <asm/arch/pxafb.h>
+
+void spitz_lcd_power(int on)
+{
+	if (on)
+		lcdtg_hw_init(480);
+	else
+		lcdtg_suspend();
+}
+
+#endif
+
+
+/*
+ * Corgi/Spitz Touchscreen to LCD interface
+ */
+static unsigned long (*get_hsync_time)(struct device *dev);
+
+static void inline sharpsl_wait_sync(int gpio)
+{
+	while((GPLR(gpio) & GPIO_bit(gpio)) == 0);
+	while((GPLR(gpio) & GPIO_bit(gpio)) != 0);
+}
+
+#ifdef CONFIG_PXA_SHARP_C7xx
+unsigned long corgi_get_hsync_len(void)
+{
+	if (!get_hsync_time)
+		get_hsync_time = symbol_get(w100fb_get_hsynclen);
+	if (!get_hsync_time)
+		return 0;
+
+	return get_hsync_time(&corgifb_device.dev);
+}
+
+void corgi_put_hsync(void)
+{
+	if (get_hsync_time)
+		symbol_put(w100fb_get_hsynclen);
+}
+
+void corgi_wait_hsync(void)
+{
+	sharpsl_wait_sync(CORGI_GPIO_HSYNC);
+}
+#endif
+
+#ifdef CONFIG_PXA_SHARP_Cxx00
+unsigned long spitz_get_hsync_len(void)
+{
+	if (!get_hsync_time)
+		get_hsync_time = symbol_get(pxafb_get_hsync_time);
+	if (!get_hsync_time)
+		return 0;
+
+	return pxafb_get_hsync_time(&pxafb_device.dev);
+}
+
+void spitz_put_hsync(void)
+{
+	if (get_hsync_time)
+		symbol_put(pxafb_get_hsync_time);
+}
+
+void spitz_wait_hsync(void)
+{
+	sharpsl_wait_sync(SPITZ_GPIO_HSYNC);
+}
+#endif
diff --git a/arch/arm/mach-pxa/sharpsl.h b/arch/arm/mach-pxa/sharpsl.h
index 672262ee9d..7007d8a1c5 100644
--- a/arch/arm/mach-pxa/sharpsl.h
+++ b/arch/arm/mach-pxa/sharpsl.h
@@ -13,3 +13,14 @@ struct corgissp_machinfo {
 };
 
 void corgi_ssp_set_machinfo(struct corgissp_machinfo *machinfo);
+
+/*
+ * SharpSL Touchscreen Driver
+ */
+
+unsigned long corgi_get_hsync_len(void);
+unsigned long spitz_get_hsync_len(void);
+void corgi_put_hsync(void);
+void spitz_put_hsync(void);
+void corgi_wait_hsync(void);
+void spitz_wait_hsync(void);
diff --git a/include/asm-arm/arch-pxa/sharpsl.h b/include/asm-arm/arch-pxa/sharpsl.h
index 5ce6d05631..1e1d110339 100644
--- a/include/asm-arm/arch-pxa/sharpsl.h
+++ b/include/asm-arm/arch-pxa/sharpsl.h
@@ -10,3 +10,13 @@ void corgi_ssp_ads7846_unlock(void);
 void corgi_ssp_lcdtg_send (unsigned char adrs, unsigned char data);
 void corgi_ssp_blduty_set(int duty);
 int corgi_ssp_max1111_get(unsigned long data);
+
+/*
+ * SharpSL Touchscreen Driver
+ */
+
+struct corgits_machinfo {
+	unsigned long (*get_hsync_len)(void);
+	void (*put_hsync)(void);
+	void (*wait_hsync)(void);
+};
-- 
2.39.5