[PATCH] SharpSL: Abstract c7x0 specifics from Corgi Touchscreen driver

Separate out the Sharp Zaurus c7x0 series specific code from the Corgi
Touchscreen driver.  Use the new functions in corgi_lcd.c via sharpsl.h for
hsync handling and pass the IRQ as a platform device resource.  Move a
function prototype into the w100fb header file where it belongs.

This enables the driver to be used by the Zaurus cxx00 series.

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>

2 files changed, 45 insertions, 31 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 0489af5a80c9..21d55ed4b88a 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -24,17 +24,17 @@ config TOUCHSCREEN_BITSY
           module will be called h3600_ts_input.
 
 config TOUCHSCREEN_CORGI
-        tristate "Corgi touchscreen (for Sharp SL-C7xx)"
+        tristate "SharpSL (Corgi and Spitz series) touchscreen driver"
         depends on PXA_SHARPSL
         default y       
         help
           Say Y here to enable the driver for the touchscreen on the 
-          Sharp SL-C7xx series of PDAs.
+          Sharp SL-C7xx and SL-Cxx00 series of PDAs.
 
           If unsure, say N.
 
           To compile this driver as a module, choose M here: the
-          module will be called ads7846_ts.
+          module will be called corgi_ts.
 
 config TOUCHSCREEN_GUNZE
         tristate "Gunze AHL-51S touchscreen"
diff --git a/drivers/input/touchscreen/corgi_ts.c b/drivers/input/touchscreen/corgi_ts.c
index 5d19261b884f..4c7fbe550365 100644
--- a/drivers/input/touchscreen/corgi_ts.c
+++ b/drivers/input/touchscreen/corgi_ts.c
@@ -1,5 +1,5 @@
 /*
- *  Touchscreen driver for Sharp Corgi models (SL-C7xx)
+ *  Touchscreen driver for Sharp SL-C7xx and SL-Cxx00 models
  *
  *  Copyright (c) 2004-2005 Richard Purdie
  *
@@ -19,7 +19,7 @@
 #include <linux/slab.h>
 #include <asm/irq.h>
 
-#include <asm/arch/corgi.h>
+#include <asm/arch/sharpsl.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/pxa-regs.h>
 
@@ -47,15 +47,20 @@ struct corgi_ts {
         struct ts_event tc;
         int pendown;
         int power_mode;
+        int irq_gpio;
+        struct corgits_machinfo *machinfo;
 };
 
-#define STATUS_HSYNC            (GPLR(CORGI_GPIO_HSYNC) & GPIO_bit(CORGI_GPIO_HSYNC))
-
-#define SyncHS()        while((STATUS_HSYNC) == 0); while((STATUS_HSYNC) != 0);
+#ifdef CONFIG_PXA25x
 #define CCNT(a)         asm volatile ("mrc p14, 0, %0, C1, C0, 0" : "=r"(a))
 #define PMNC_GET(x)     asm volatile ("mrc p14, 0, %0, C0, C0, 0" : "=r"(x))
 #define PMNC_SET(x)     asm volatile ("mcr p14, 0, %0, C0, C0, 0" : : "r"(x))
-
+#endif
+#ifdef CONFIG_PXA27x
+#define CCNT(a)         asm volatile ("mrc p14, 0, %0, C1, C1, 0" : "=r"(a))
+#define PMNC_GET(x)     asm volatile ("mrc p14, 0, %0, C0, C1, 0" : "=r"(x))
+#define PMNC_SET(x)     asm volatile ("mcr p14, 0, %0, C0, C1, 0" : : "r"(x))
+#endif
 
 /* ADS7846 Touch Screen Controller bit definitions */
 #define ADSCTRL_PD0             (1u << 0)       /* PD0 */
@@ -66,12 +71,11 @@ struct corgi_ts {
 #define ADSCTRL_STS             (1u << 7)       /* Start Bit */
 
 /* External Functions */
-extern unsigned long w100fb_get_hsynclen(struct device *dev);
 extern unsigned int get_clk_frequency_khz(int info);
 
-static unsigned long calc_waittime(void)
+static unsigned long calc_waittime(struct corgi_ts *corgi_ts)
 {
-        unsigned long hsync_len = w100fb_get_hsynclen(&corgifb_device.dev);
+        unsigned long hsync_len = corgi_ts->machinfo->get_hsync_len();
 
         if (hsync_len)
                 return get_clk_frequency_khz(0)*1000/hsync_len;
@@ -79,7 +83,8 @@ static unsigned long calc_waittime(void)
                 return 0;
 }
 
-static int sync_receive_data_send_cmd(int doRecive, int doSend, unsigned int address, unsigned long wait_time)
+static int sync_receive_data_send_cmd(struct corgi_ts *corgi_ts, int doRecive, int doSend,
+                unsigned int address, unsigned long wait_time)
 {
         unsigned long timer1 = 0, timer2, pmnc = 0;
         int pos = 0;
@@ -90,7 +95,7 @@ static int sync_receive_data_send_cmd(int doRecive, int doSend, unsigned int add
                         PMNC_SET(0x01);
 
                 /* polling HSync */
-                SyncHS();
+                corgi_ts->machinfo->wait_hsync();
                 /* get CCNT */
                 CCNT(timer1);
         }
@@ -109,7 +114,7 @@ static int sync_receive_data_send_cmd(int doRecive, int doSend, unsigned int add
                         CCNT(timer2);
                         if (timer2-timer1 > wait_time) {
                                 /* too slow - timeout, try again */
-                                SyncHS();
+                                corgi_ts->machinfo->wait_hsync();
                                 /* get OSCR */
                                 CCNT(timer1);
                                 /* Wait after HSync */
@@ -133,23 +138,23 @@ static int read_xydata(struct corgi_ts *corgi_ts)
         /* critical section */
         local_irq_save(flags);
         corgi_ssp_ads7846_lock();
-        wait_time=calc_waittime();
+        wait_time = calc_waittime(corgi_ts);
 
         /* Y-axis */
-        sync_receive_data_send_cmd(0, 1, 1u, wait_time);
+        sync_receive_data_send_cmd(corgi_ts, 0, 1, 1u, wait_time);
 
         /* Y-axis */
-        sync_receive_data_send_cmd(1, 1, 1u, wait_time);
+        sync_receive_data_send_cmd(corgi_ts, 1, 1, 1u, wait_time);
 
         /* X-axis */
-        y = sync_receive_data_send_cmd(1, 1, 5u, wait_time);
+        y = sync_receive_data_send_cmd(corgi_ts, 1, 1, 5u, wait_time);
 
         /* Z1 */
-        x = sync_receive_data_send_cmd(1, 1, 3u, wait_time);
+        x = sync_receive_data_send_cmd(corgi_ts, 1, 1, 3u, wait_time);
 
         /* Z2 */
-        z1 = sync_receive_data_send_cmd(1, 1, 4u, wait_time);
-        z2 = sync_receive_data_send_cmd(1, 0, 4u, wait_time);
+        z1 = sync_receive_data_send_cmd(corgi_ts, 1, 1, 4u, wait_time);
+        z2 = sync_receive_data_send_cmd(corgi_ts, 1, 0, 4u, wait_time);
 
         /* Power-Down Enable */
         corgi_ssp_ads7846_put((1u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
@@ -189,9 +194,9 @@ static void new_data(struct corgi_ts *corgi_ts, struct pt_regs *regs)
 
 static void ts_interrupt_main(struct corgi_ts *corgi_ts, int isTimer, struct pt_regs *regs)
 {
-        if ((GPLR(CORGI_GPIO_TP_INT) & GPIO_bit(CORGI_GPIO_TP_INT)) == 0) {
+        if ((GPLR(IRQ_TO_GPIO(corgi_ts->irq_gpio)) & GPIO_bit(IRQ_TO_GPIO(corgi_ts->irq_gpio))) == 0) {
                 /* Disable Interrupt */
-                set_irq_type(CORGI_IRQ_GPIO_TP_INT, IRQT_NOEDGE);
+                set_irq_type(corgi_ts->irq_gpio, IRQT_NOEDGE);
                 if (read_xydata(corgi_ts)) {
                         corgi_ts->pendown = 1;
                         new_data(corgi_ts, regs);
@@ -210,7 +215,7 @@ static void ts_interrupt_main(struct corgi_ts *corgi_ts, int isTimer, struct pt_
                 }
 
                 /* Enable Falling Edge */
-                set_irq_type(CORGI_IRQ_GPIO_TP_INT, IRQT_FALLING);
+                set_irq_type(corgi_ts->irq_gpio, IRQT_FALLING);
                 corgi_ts->pendown = 0;
         }
 }
@@ -254,7 +259,7 @@ static int corgits_resume(struct device *dev, uint32_t level)
 
                 corgi_ssp_ads7846_putget((4u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
                 /* Enable Falling Edge */
-                set_irq_type(CORGI_IRQ_GPIO_TP_INT, IRQT_FALLING);
+                set_irq_type(corgi_ts->irq_gpio, IRQT_FALLING);
                 corgi_ts->power_mode = PWR_MODE_ACTIVE;
         }
         return 0;
@@ -267,6 +272,7 @@ static int corgits_resume(struct device *dev, uint32_t level)
 static int __init corgits_probe(struct device *dev)
 {
         struct corgi_ts *corgi_ts;
+        struct platform_device *pdev = to_platform_device(dev);
 
         if (!(corgi_ts = kmalloc(sizeof(struct corgi_ts), GFP_KERNEL)))
                 return -ENOMEM;
@@ -275,6 +281,14 @@ static int __init corgits_probe(struct device *dev)
 
         memset(corgi_ts, 0, sizeof(struct corgi_ts));
 
+        corgi_ts->machinfo = dev->platform_data;
+        corgi_ts->irq_gpio = platform_get_irq(pdev, 0);
+
+        if (corgi_ts->irq_gpio < 0) {
+                kfree(corgi_ts);
+                return -ENODEV;
+        }
+
         init_input_dev(&corgi_ts->input);
         corgi_ts->input.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
         corgi_ts->input.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
@@ -293,8 +307,7 @@ static int __init corgits_probe(struct device *dev)
         corgi_ts->input.id.product = 0x0002;
         corgi_ts->input.id.version = 0x0100;
 
-        pxa_gpio_mode(CORGI_GPIO_TP_INT | GPIO_IN);
-        pxa_gpio_mode(CORGI_GPIO_HSYNC | GPIO_IN);
+        pxa_gpio_mode(IRQ_TO_GPIO(corgi_ts->irq_gpio) | GPIO_IN);
 
         /* Initiaize ADS7846 Difference Reference mode */
         corgi_ssp_ads7846_putget((1u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
@@ -313,14 +326,14 @@ static int __init corgits_probe(struct device *dev)
         input_register_device(&corgi_ts->input);
         corgi_ts->power_mode = PWR_MODE_ACTIVE;
 
-        if (request_irq(CORGI_IRQ_GPIO_TP_INT, ts_interrupt, SA_INTERRUPT, "ts", corgi_ts)) {
+        if (request_irq(corgi_ts->irq_gpio, ts_interrupt, SA_INTERRUPT, "ts", corgi_ts)) {
                 input_unregister_device(&corgi_ts->input);
                 kfree(corgi_ts);
                 return -EBUSY;
         }
 
         /* Enable Falling Edge */
-        set_irq_type(CORGI_IRQ_GPIO_TP_INT, IRQT_FALLING);
+        set_irq_type(corgi_ts->irq_gpio, IRQT_FALLING);
 
         printk(KERN_INFO "input: Corgi Touchscreen Registered\n");
 
@@ -331,8 +344,9 @@ static int corgits_remove(struct device *dev)
 {
         struct corgi_ts *corgi_ts = dev_get_drvdata(dev);
 
-        free_irq(CORGI_IRQ_GPIO_TP_INT, NULL);
+        free_irq(corgi_ts->irq_gpio, NULL);
         del_timer_sync(&corgi_ts->timer);
+        corgi_ts->machinfo->put_hsync();
         input_unregister_device(&corgi_ts->input);
         kfree(corgi_ts);
         return 0;