From f32fa9ef6476be0cf8106bc57a98724c48d4baa1 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marek.vasut at gmail.com>
Date: Fri, 17 Jul 2009 09:54:13 +0200
Subject: [PATCH 1/2] Add Palm support to Mainstone accelerated touch
This patch refactors the Mainstone accelerated touch code a little and
adds support for interrupt driven touchscreen on Palm LifeDrive, TX and
Tungsten T5.
Signed-off-by: Marek Vasut <marek.vasut at gmail.com>
---
drivers/input/touchscreen/Kconfig | 4 +-
drivers/input/touchscreen/mainstone-wm97xx.c | 52 +++++++++++++++++--------
2 files changed, 37 insertions(+), 19 deletions(-)
diff --git a/drivers/input/touchscreen/Kconfig
b/drivers/input/touchscreen/Kconfig
index 72e2712..0fdae1a 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -366,11 +366,11 @@ config TOUCHSCREEN_WM97XX_ATMEL
be called atmel-wm97xx.
config TOUCHSCREEN_WM97XX_MAINSTONE
- tristate "WM97xx Mainstone accelerated touch"
+ tristate "WM97xx Mainstone/Palm accelerated touch"
depends on TOUCHSCREEN_WM97XX && ARCH_PXA
help
Say Y here for support for streaming mode with WM97xx touchscreens
- on Mainstone systems.
+ on Mainstone, Palm Tungsten T5, TX and LifeDrive systems.
If unsure, say N.
diff --git a/drivers/input/touchscreen/mainstone-wm97xx.c
b/drivers/input/touchscreen/mainstone-wm97xx.c
index 4cc047a..60bda9a 100644
--- a/drivers/input/touchscreen/mainstone-wm97xx.c
+++ b/drivers/input/touchscreen/mainstone-wm97xx.c
@@ -31,9 +31,13 @@
#include <linux/interrupt.h>
#include <linux/wm97xx.h>
#include <linux/io.h>
+#include <linux/gpio.h>
+
#include <mach/regs-ac97.h>
-#define VERSION "0.13"
+#include <asm/mach-types.h>
+
+#define VERSION "0.14"
struct continuous {
u16 id; /* codec id */
@@ -62,6 +66,7 @@ static const struct continuous cinfo[] = {
/* continuous speed index */
static int sp_idx;
static u16 last, tries;
+static int irq;
/*
* Pen sampling frequency (Hz) in continuous mode.
@@ -171,7 +176,7 @@ up:
static int wm97xx_acc_startup(struct wm97xx *wm)
{
- int idx = 0;
+ int idx = 0, ret = 0;
/* check we have a codec */
if (wm->ac97 == NULL)
@@ -191,18 +196,37 @@ static int wm97xx_acc_startup(struct wm97xx *wm)
"mainstone accelerated touchscreen driver, %d samples/sec\n",
cinfo[sp_idx].speed);
+ /* IRQ driven touchscreen is used on Palm hardware */
+ if (machine_is_palmt5() || machine_is_palmtx() || machine_is_palmld())
{
+ pen_int = 1;
+ irq = 27;
+ } else if (machine_is_mainstone() && pen_int)
+ irq = 4;
+
+ if (irq) {
+ ret = gpio_request(irq, "Touchscreen IRQ");
+ if (ret)
+ goto out;
+
+ ret = gpio_direction_input(irq);
+ if (ret) {
+ gpio_free(irq);
+ goto out;
+ }
+
+ wm->pen_irq = gpio_to_irq(irq);
+ set_irq_type(wm->pen_irq, IRQ_TYPE_EDGE_BOTH);
+ } else /* pen irq not supported */
+ pen_int = 0;
+
/* codec specific irq config */
if (pen_int) {
switch (wm->id) {
case WM9705_ID2:
- wm->pen_irq = IRQ_GPIO(4);
- set_irq_type(IRQ_GPIO(4), IRQ_TYPE_EDGE_BOTH);
break;
case WM9712_ID2:
case WM9713_ID2:
- /* enable pen down interrupt */
/* use PEN_DOWN GPIO 13 to assert IRQ on GPIO line 2
*/
- wm->pen_irq = MAINSTONE_AC97_IRQ;
wm97xx_config_gpio(wm, WM97XX_GPIO_13, WM97XX_GPIO_IN,
WM97XX_GPIO_POL_HIGH,
WM97XX_GPIO_STICKY,
@@ -220,23 +244,17 @@ static int wm97xx_acc_startup(struct wm97xx *wm)
}
}
- return 0;
+out:
+ return ret;
}
static void wm97xx_acc_shutdown(struct wm97xx *wm)
{
/* codec specific deconfig */
if (pen_int) {
- switch (wm->id & 0xffff) {
- case WM9705_ID2:
- wm->pen_irq = 0;
- break;
- case WM9712_ID2:
- case WM9713_ID2:
- /* disable interrupt */
- wm->pen_irq = 0;
- break;
- }
+ if (irq)
+ gpio_free(irq);
+ wm->pen_irq = 0;
}
}
--
1.6.3.3