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Input: wm97xx - 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@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Marek Vasut 2009-07-20 22:26:37 -07:00 committed by Dmitry Torokhov
parent b7788c5ff9
commit b833306feb
2 changed files with 35 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/input/touchscreen/Kconfig
View File

@ -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.

50
drivers/input/touchscreen/mainstone-wm97xx.c
View File

@ -31,9 +31,11 @@
#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>
struct continuous {
u16 id; /* codec id */
@ -62,6 +64,7 @@ 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 +174,7 @@ 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 +194,37 @@ 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 +242,17 @@ 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;
}
}