Merge branch 's3c-touchscreen-2.6.31' into om-gta02-2.6.31

4 files changed, 108 insertions, 7 deletions

diff --git a/arch/arm/mach-s3c2410/include/mach/ts.h b/arch/arm/mach-s3c2410/include/mach/ts.h
new file mode 100644
index 00000000000..ac0c727d155
--- /dev/null
+++ b/arch/arm/mach-s3c2410/include/mach/ts.h
@@ -0,0 +1,35 @@
+/* arch/arm/mach-s3c2410/include/mach/ts.h
+ *
+ * Copyright (c) 2005 Arnaud Patard <arnaud.patard@rtp-net.org>
+ *
+ *
+ * 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.
+ *
+ *
+ *  Changelog:
+ *     24-Mar-2005     RTP     Created file
+ *     03-Aug-2005     RTP     Renamed to ts.h
+ */
+
+#ifndef __ASM_ARM_TS_H
+#define __ASM_ARM_TS_H
+
+#include <linux/input/touchscreen/ts_filter.h>
+
+struct s3c2410_ts_mach_info {
+	/* Touchscreen delay. */
+	int delay;
+	/* Prescaler value. */
+	int presc;
+	/*
+	 * Null-terminated array of pointers to filter APIs and configurations
+	 * we want to use. In the same order they will be applied.
+	 */
+	const struct ts_filter_chain_configuration *filter_config;
+};
+
+void set_s3c2410ts_info(const struct s3c2410_ts_mach_info *hard_s3c2410ts_info);
+
+#endif /* __ASM_ARM_TS_H */
diff --git a/arch/arm/plat-s3c/include/plat/devs.h b/arch/arm/plat-s3c/include/plat/devs.h
index 2e170827e0b..41773808040 100644
--- a/arch/arm/plat-s3c/include/plat/devs.h
+++ b/arch/arm/plat-s3c/include/plat/devs.h
@@ -51,6 +51,8 @@ extern struct platform_device s3c_device_nand;
 extern struct platform_device s3c_device_usbgadget;
 extern struct platform_device s3c_device_usb_hsotg;
 
+extern struct platform_device s3c_device_ts;
+
 /* s3c2440 specific devices */
 
 #ifdef CONFIG_CPU_S3C2440
diff --git a/arch/arm/plat-s3c24xx/adc.c b/arch/arm/plat-s3c24xx/adc.c
index ee1baf11ad9..9cff2320e11 100644
--- a/arch/arm/plat-s3c24xx/adc.c
+++ b/arch/arm/plat-s3c24xx/adc.c
@@ -43,6 +43,7 @@ struct s3c_adc_client {
 	unsigned int		 nr_samples;
 	unsigned char		 is_ts;
 	unsigned char		 channel;
+	unsigned int		 selected;
 
 	void	(*select_cb)(unsigned selected);
 	void	(*convert_cb)(unsigned val1, unsigned val2,
@@ -58,20 +59,31 @@ struct adc_device {
 	void __iomem		*regs;
 
 	unsigned int		 prescale;
+	unsigned int		 delay;
 
 	int			 irq;
 };
 
 static struct adc_device *adc_dev;
 
+static struct work_struct resume_work;
+
 static LIST_HEAD(adc_pending);
 
 #define adc_dbg(_adc, msg...) dev_dbg(&(_adc)->pdev->dev, msg)
 
+#define AUTOPST	(S3C2410_ADCTSC_YM_SEN | S3C2410_ADCTSC_YP_SEN | \
+		S3C2410_ADCTSC_XP_SEN | S3C2410_ADCTSC_AUTO_PST | \
+		S3C2410_ADCTSC_XY_PST(0))
+
 static inline void s3c_adc_convert(struct adc_device *adc)
 {
 	unsigned con = readl(adc->regs + S3C2410_ADCCON);
 
+	if (adc->cur->is_ts)
+		writel(S3C2410_ADCTSC_PULL_UP_DISABLE | AUTOPST,
+		       adc->regs + S3C2410_ADCTSC);
+
 	con |= S3C2410_ADCCON_ENABLE_START;
 	writel(con, adc->regs + S3C2410_ADCCON);
 }
@@ -81,7 +93,10 @@ static inline void s3c_adc_select(struct adc_device *adc,
 {
 	unsigned con = readl(adc->regs + S3C2410_ADCCON);
 
-	client->select_cb(1);
+	if (!client->selected) {
+		client->selected = 1;
+		client->select_cb(1);
+	}
 
 	con &= ~S3C2410_ADCCON_MUXMASK;
 	con &= ~S3C2410_ADCCON_STDBM;
@@ -105,12 +120,9 @@ static void s3c_adc_try(struct adc_device *adc)
 {
 	struct s3c_adc_client *next = adc->ts_pend;
 
-	if (!next && !list_empty(&adc_pending)) {
+	if (!next && !list_empty(&adc_pending))
 		next = list_first_entry(&adc_pending,
 					struct s3c_adc_client, pend);
-		list_del(&next->pend);
-	} else
-		adc->ts_pend = NULL;
 
 	if (next) {
 		adc_dbg(adc, "new client is %p\n", next);
@@ -234,14 +246,20 @@ static irqreturn_t s3c_adc_irq(int irq, void *pw)
 
 	if (client->nr_samples > 0) {
 		/* fire another conversion for this */
-
+		client->selected = 1;
 		client->select_cb(1);
 		s3c_adc_convert(adc);
 	} else {
 		local_irq_save(flags);
-		(client->select_cb)(0);
+		client->selected = 0;
+		if (!adc->cur->is_ts)
+			list_del(&adc->cur->pend);
+		else
+			adc->ts_pend = NULL;
 		adc->cur = NULL;
 
+		(client->select_cb)(0);
+
 		s3c_adc_try(adc);
 		local_irq_restore(flags);
 	}
@@ -264,6 +282,7 @@ static int s3c_adc_probe(struct platform_device *pdev)
 
 	adc->pdev = pdev;
 	adc->prescale = S3C2410_ADCCON_PRSCVL(49);
+	adc->delay = 0x2710;
 
 	adc->irq = platform_get_irq(pdev, 1);
 	if (adc->irq <= 0) {
@@ -303,6 +322,7 @@ static int s3c_adc_probe(struct platform_device *pdev)
 
 	writel(adc->prescale | S3C2410_ADCCON_PRSCEN,
 	       adc->regs + S3C2410_ADCCON);
+	writel(adc->delay, adc->regs + S3C2410_ADCDLY);
 
 	dev_info(dev, "attached adc driver\n");
 
@@ -346,18 +366,42 @@ static int s3c_adc_suspend(struct platform_device *pdev, pm_message_t state)
 	writel(con, adc->regs + S3C2410_ADCCON);
 
 	clk_disable(adc->clk);
+	disable_irq(IRQ_ADC);
+	if (!list_empty(&adc_pending) || adc->ts_pend)
+		dev_info(&pdev->dev, "We still have adc clients pending\n");
 
 	return 0;
 }
 
+/* It seems this is not needed. This is under upstream review now. */
+static void adc_resume_work(struct work_struct *work)
+{
+	if (!adc_dev) /* Have no ADC here */
+		return;
+
+	if (!list_empty(&adc_pending) || adc_dev->ts_pend)
+		/* We still have adc clients pending */
+		s3c_adc_try(adc_dev);
+}
+
 static int s3c_adc_resume(struct platform_device *pdev)
 {
 	struct adc_device *adc = platform_get_drvdata(pdev);
 
+	enable_irq(IRQ_ADC);
 	clk_enable(adc->clk);
 
 	writel(adc->prescale | S3C2410_ADCCON_PRSCEN,
 	       adc->regs + S3C2410_ADCCON);
+	writel(adc->delay, adc->regs + S3C2410_ADCDLY);
+
+	/* Schedule task if there are clients pending. */
+	if (!list_empty(&adc_pending) || adc_dev->ts_pend) {
+		INIT_WORK(&resume_work, adc_resume_work);
+		if (!schedule_work(&resume_work))
+			dev_err(&pdev->dev,
+				"Failed to schedule adc_resume work!\n");
+	}
 
 	return 0;
 }
diff --git a/arch/arm/plat-s3c24xx/devs.c b/arch/arm/plat-s3c24xx/devs.c
index 4eb378c89a3..a89286b4a12 100644
--- a/arch/arm/plat-s3c24xx/devs.c
+++ b/arch/arm/plat-s3c24xx/devs.c
@@ -28,6 +28,8 @@
 #include <mach/hardware.h>
 #include <asm/irq.h>
 
+#include <mach/ts.h>
+
 #include <plat/regs-serial.h>
 #include <plat/udc.h>
 
@@ -199,6 +201,24 @@ struct platform_device s3c_device_nand = {
 
 EXPORT_SYMBOL(s3c_device_nand);
 
+/* Touchscreen */
+
+struct platform_device s3c_device_ts = {
+	.name		= "s3c2410-ts",
+	.id		= -1,
+	.dev.parent	= &s3c_device_adc.dev,
+};
+
+static struct s3c2410_ts_mach_info s3c2410ts_info;
+
+void set_s3c2410ts_info(const struct s3c2410_ts_mach_info *hard_s3c2410ts_info)
+{
+	memcpy(&s3c2410ts_info, hard_s3c2410ts_info,
+		sizeof(struct s3c2410_ts_mach_info));
+	s3c_device_ts.dev.platform_data = &s3c2410ts_info;
+}
+EXPORT_SYMBOL(set_s3c2410ts_info);
+
 /* USB Device (Gadget)*/
 
 static struct resource s3c_usbgadget_resource[] = {