From edb403fbfb0ad56e62d8ebbecc3b846487020e0f Mon Sep 17 00:00:00 2001
From: Eric Miao <eric.miao@marvell.com>
Date: Fri, 29 Aug 2008 08:09:48 +0800
Subject: [PATCH] [ARM] pxa/corgi: use SPI-based driver for ads7846, corgi-lcd
 and max1111

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/mach-pxa/Makefile |   2 +-
 arch/arm/mach-pxa/corgi.c  | 293 ++++++++++++++++++++-------------------------
 2 files changed, 132 insertions(+), 163 deletions(-)

diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile
index b069dcb..ced2a67 100644
--- a/arch/arm/mach-pxa/Makefile
+++ b/arch/arm/mach-pxa/Makefile
@@ -28,7 +28,7 @@ obj-$(CONFIG_MACH_MAINSTONE)	+= mainstone.o
 obj-$(CONFIG_ARCH_PXA_IDP)	+= idp.o
 obj-$(CONFIG_MACH_TRIZEPS4)	+= trizeps4.o
 obj-$(CONFIG_MACH_COLIBRI)	+= colibri.o
-obj-$(CONFIG_PXA_SHARP_C7xx)	+= corgi.o corgi_ssp.o corgi_lcd.o sharpsl_pm.o corgi_pm.o
+obj-$(CONFIG_PXA_SHARP_C7xx)	+= corgi.o sharpsl_pm.o corgi_pm.o
 obj-$(CONFIG_PXA_SHARP_Cxx00)	+= spitz.o corgi_ssp.o corgi_lcd.o sharpsl_pm.o spitz_pm.o
 obj-$(CONFIG_MACH_AKITA)	+= akita-ioexp.o
 obj-$(CONFIG_MACH_POODLE)	+= poodle.o
diff --git a/arch/arm/mach-pxa/corgi.c b/arch/arm/mach-pxa/corgi.c
index 14155fc..6876563 100644
--- a/arch/arm/mach-pxa/corgi.c
+++ b/arch/arm/mach-pxa/corgi.c
@@ -22,6 +22,9 @@
 #include <linux/pm.h>
 #include <linux/gpio.h>
 #include <linux/backlight.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/ads7846.h>
+#include <linux/spi/corgi_lcd.h>
 #include <video/w100fb.h>
 
 #include <asm/setup.h>
@@ -43,6 +46,7 @@
 #include <mach/irda.h>
 #include <mach/mmc.h>
 #include <mach/udc.h>
+#include <mach/pxa2xx_spi.h>
 #include <mach/corgi.h>
 #include <mach/sharpsl.h>
 
@@ -151,53 +155,6 @@ static struct scoop_pcmcia_config corgi_pcmcia_config = {
 
 EXPORT_SYMBOL(corgiscoop_device);
 
-
-/*
- * Corgi SSP Device
- *
- * Set the parent as the scoop device because a lot of SSP devices
- * also use scoop functions and this makes the power up/down order
- * work correctly.
- */
-struct platform_device corgissp_device = {
-	.name		= "corgi-ssp",
-	.dev		= {
- 		.parent = &corgiscoop_device.dev,
-	},
-	.id		= -1,
-};
-
-struct corgissp_machinfo corgi_ssp_machinfo = {
-	.port		= 1,
-	.cs_lcdcon	= CORGI_GPIO_LCDCON_CS,
-	.cs_ads7846	= CORGI_GPIO_ADS7846_CS,
-	.cs_max1111	= CORGI_GPIO_MAX1111_CS,
-	.clk_lcdcon	= 76,
-	.clk_ads7846	= 2,
-	.clk_max1111	= 8,
-};
-
-
-/*
- * LCD/Framebuffer
- */
-static void w100_lcdtg_suspend(struct w100fb_par *par)
-{
-	corgi_lcdtg_suspend();
-}
-
-static void w100_lcdtg_init(struct w100fb_par *par)
-{
-	corgi_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,
 	.sdram_mode_reg    = 0x00650021,
@@ -276,7 +233,6 @@ static struct w100_mode corgi_fb_modes[] = {
 };
 
 static struct w100fb_mach_info corgi_fb_info = {
-	.tg         = &corgi_lcdtg_info,
 	.init_mode  = INIT_MODE_ROTATED,
 	.mem        = &corgi_fb_mem,
 	.regs       = &corgi_fb_regs,
@@ -302,60 +258,10 @@ static struct platform_device corgifb_device = {
 	.resource	= corgi_fb_resources,
 	.dev            = {
 		.platform_data = &corgi_fb_info,
-		.parent = &corgissp_device.dev,
 	},
 
 };
 
-
-/*
- * Corgi Backlight Device
- */
-static void corgi_bl_kick_battery(void)
-{
-	void (*kick_batt)(void);
-
-	kick_batt = symbol_get(sharpsl_battery_kick);
-	if (kick_batt) {
-		kick_batt();
-		symbol_put(sharpsl_battery_kick);
-	}
-}
-
-static void corgi_bl_set_intensity(int intensity)
-{
-	if (intensity > 0x10)
-		intensity += 0x10;
-
-	/* Bits 0-4 are accessed via the SSP interface */
-	corgi_ssp_blduty_set(intensity & 0x1f);
-
-	/* Bit 5 is via SCOOP */
-	if (intensity & 0x0020)
-		set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_BACKLIGHT_CONT);
-	else
-		reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_BACKLIGHT_CONT);
-}
-
-static struct generic_bl_info corgi_bl_machinfo = {
-	.name = "corgi-bl",
-	.max_intensity = 0x2f,
-	.default_intensity = 0x1f,
-	.limit_mask = 0x0b,
-	.set_bl_intensity = corgi_bl_set_intensity,
-	.kick_battery = corgi_bl_kick_battery,
-};
-
-static struct platform_device corgibl_device = {
-	.name		= "generic-bl",
-	.dev		= {
- 		.parent = &corgifb_device.dev,
-		.platform_data	= &corgi_bl_machinfo,
-	},
-	.id		= -1,
-};
-
-
 /*
  * Corgi Keyboard Device
  */
@@ -373,66 +279,6 @@ static struct platform_device corgiled_device = {
 	.id		= -1,
 };
 
-
-/*
- * Corgi Touch Screen Device
- */
-static unsigned long (*get_hsync_invperiod)(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);
-}
-
-static unsigned long corgi_get_hsync_invperiod(void)
-{
-	if (!get_hsync_invperiod)
-		get_hsync_invperiod = symbol_get(w100fb_get_hsynclen);
-	if (!get_hsync_invperiod)
-		return 0;
-
-	return get_hsync_invperiod(&corgifb_device.dev);
-}
-
-static void corgi_put_hsync(void)
-{
-	if (get_hsync_invperiod)
-		symbol_put(w100fb_get_hsynclen);
-	get_hsync_invperiod = NULL;
-}
-
-static void corgi_wait_hsync(void)
-{
-	sharpsl_wait_sync(CORGI_GPIO_HSYNC);
-}
-
-static struct resource corgits_resources[] = {
-	[0] = {
-		.start		= CORGI_IRQ_GPIO_TP_INT,
-		.end		= CORGI_IRQ_GPIO_TP_INT,
-		.flags		= IORESOURCE_IRQ,
-	},
-};
-
-static struct corgits_machinfo  corgi_ts_machinfo = {
-	.get_hsync_invperiod = corgi_get_hsync_invperiod,
-	.put_hsync           = corgi_put_hsync,
-	.wait_hsync          = corgi_wait_hsync,
-};
-
-static struct platform_device corgits_device = {
-	.name		= "corgi-ts",
-	.dev		= {
- 		.parent = &corgissp_device.dev,
-		.platform_data	= &corgi_ts_machinfo,
-	},
-	.id		= -1,
-	.num_resources	= ARRAY_SIZE(corgits_resources),
-	.resource	= corgits_resources,
-};
-
-
 /*
  * MMC/SD Device
  *
@@ -555,14 +401,137 @@ static struct pxa2xx_udc_mach_info udc_info __initdata = {
 	.gpio_pullup		= CORGI_GPIO_USB_PULLUP,
 };
 
+#if defined(CONFIG_SPI_PXA2XX) || defined(CONFIG_SPI_PXA2XX_MASTER)
+static struct pxa2xx_spi_master corgi_spi_info = {
+	.num_chipselect	= 3,
+};
+
+static struct ads7846_platform_data corgi_ads7846_info = {
+	.model			= 7846,
+	.vref_delay_usecs	= 100,
+	.x_plate_ohms		= 419,
+	.y_plate_ohms		= 486,
+	.gpio_pendown		= CORGI_GPIO_TP_INT,
+};
+
+static void corgi_ads7846_cs(u32 command)
+{
+	gpio_set_value(CORGI_GPIO_ADS7846_CS, !(command == PXA2XX_CS_ASSERT));
+}
+
+static struct pxa2xx_spi_chip corgi_ads7846_chip = {
+	.cs_control	= corgi_ads7846_cs,
+};
+
+static void corgi_notify_intensity(int intensity)
+{
+	/* Bit 5 is via SCOOP */
+	if (intensity & 0x0020)
+		set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_BACKLIGHT_CONT);
+	else
+		reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_BACKLIGHT_CONT);
+}
+
+static void corgi_bl_kick_battery(void)
+{
+	void (*kick_batt)(void);
+
+	kick_batt = symbol_get(sharpsl_battery_kick);
+	if (kick_batt) {
+		kick_batt();
+		symbol_put(sharpsl_battery_kick);
+	}
+}
+
+static struct corgi_lcd_platform_data corgi_lcdcon_info = {
+	.init_mode		= CORGI_LCD_MODE_VGA,
+	.max_intensity		= 0x2f,
+	.default_intensity	= 0x1f,
+	.limit_mask		= 0x0b,
+	.notify			= corgi_notify_intensity,
+	.kick_battery		= corgi_bl_kick_battery,
+};
+
+static void corgi_lcdcon_cs(u32 command)
+{
+	gpio_set_value(CORGI_GPIO_LCDCON_CS, !(command == PXA2XX_CS_ASSERT));
+}
+
+static struct pxa2xx_spi_chip corgi_lcdcon_chip = {
+	.cs_control	= corgi_lcdcon_cs,
+};
+
+static void corgi_max1111_cs(u32 command)
+{
+	gpio_set_value(CORGI_GPIO_MAX1111_CS, !(command == PXA2XX_CS_ASSERT));
+}
+
+static struct pxa2xx_spi_chip corgi_max1111_chip = {
+	.cs_control	= corgi_max1111_cs,
+};
+
+static struct spi_board_info corgi_spi_devices[] = {
+	{
+		.modalias	= "ads7846",
+		.max_speed_hz	= 1200000,
+		.bus_num	= 1,
+		.chip_select	= 0,
+		.platform_data	= &corgi_ads7846_info,
+		.controller_data= &corgi_ads7846_chip,
+		.irq		= gpio_to_irq(CORGI_GPIO_TP_INT),
+	}, {
+		.modalias	= "corgi-lcd",
+		.max_speed_hz	= 50000,
+		.bus_num	= 1,
+		.chip_select	= 1,
+		.platform_data	= &corgi_lcdcon_info,
+		.controller_data= &corgi_lcdcon_chip,
+	}, {
+		.modalias	= "max1111",
+		.max_speed_hz	= 450000,
+		.bus_num	= 1,
+		.chip_select	= 2,
+		.controller_data= &corgi_max1111_chip,
+	},
+};
+
+static void __init corgi_init_spi(void)
+{
+	int err;
+
+	err = gpio_request(CORGI_GPIO_ADS7846_CS, "ADS7846_CS");
+	if (err)
+		return;
+
+	err = gpio_request(CORGI_GPIO_LCDCON_CS, "LCDCON_CS");
+	if (err)
+		goto err_free_1;
+
+	err = gpio_request(CORGI_GPIO_MAX1111_CS, "MAX1111_CS");
+	if (err)
+		goto err_free_2;
+
+	gpio_direction_output(CORGI_GPIO_ADS7846_CS, 1);
+	gpio_direction_output(CORGI_GPIO_LCDCON_CS, 1);
+	gpio_direction_output(CORGI_GPIO_MAX1111_CS, 1);
+
+	pxa2xx_set_spi_info(1, &corgi_spi_info);
+	spi_register_board_info(ARRAY_AND_SIZE(corgi_spi_devices));
+	return;
+
+err_free_2:
+	gpio_free(CORGI_GPIO_LCDCON_CS);
+err_free_1:
+	gpio_free(CORGI_GPIO_ADS7846_CS);
+}
+#else
+static inline void corgi_init_spi(void) {}
+#endif
 
 static struct platform_device *devices[] __initdata = {
 	&corgiscoop_device,
-	&corgissp_device,
 	&corgifb_device,
 	&corgikbd_device,
-	&corgibl_device,
-	&corgits_device,
 	&corgiled_device,
 };
 
@@ -592,7 +561,7 @@ static void __init corgi_init(void)
 
 	pxa2xx_mfp_config(ARRAY_AND_SIZE(corgi_pin_config));
 
-	corgi_ssp_set_machinfo(&corgi_ssp_machinfo);
+	corgi_init_spi();
 
  	pxa_set_udc_info(&udc_info);
 	pxa_set_mci_info(&corgi_mci_platform_data);
-- 
2.7.4