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path: root/drivers/input/touchscreen/s3c2410_ts.c
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Diffstat (limited to 'drivers/input/touchscreen/s3c2410_ts.c')
-rw-r--r--drivers/input/touchscreen/s3c2410_ts.c105
1 files changed, 44 insertions, 61 deletions
diff --git a/drivers/input/touchscreen/s3c2410_ts.c b/drivers/input/touchscreen/s3c2410_ts.c
index 6386b441ef8..19cb247dbb8 100644
--- a/drivers/input/touchscreen/s3c2410_ts.c
+++ b/drivers/input/touchscreen/s3c2410_ts.c
@@ -26,10 +26,8 @@
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/input.h>
-#include <linux/init.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
@@ -38,9 +36,7 @@
#include <plat/adc.h>
#include <plat/regs-adc.h>
-
-#include <mach/regs-gpio.h>
-#include <mach/ts.h>
+#include <linux/platform_data/touchscreen-s3c2410.h>
#define TSC_SLEEP (S3C2410_ADCTSC_PULL_UP_DISABLE | S3C2410_ADCTSC_XY_PST(0))
@@ -58,6 +54,8 @@
S3C2410_ADCTSC_AUTO_PST | \
S3C2410_ADCTSC_XY_PST(0))
+#define FEAT_PEN_IRQ (1 << 0) /* HAS ADCCLRINTPNDNUP */
+
/* Per-touchscreen data. */
/**
@@ -72,6 +70,7 @@
* @irq_tc: The interrupt number for pen up/down interrupt
* @count: The number of samples collected.
* @shift: The log2 of the maximum count to read in one go.
+ * @features: The features supported by the TSADC MOdule.
*/
struct s3c2410ts {
struct s3c_adc_client *client;
@@ -84,26 +83,12 @@ struct s3c2410ts {
int irq_tc;
int count;
int shift;
+ int features;
};
static struct s3c2410ts ts;
/**
- * s3c2410_ts_connect - configure gpio for s3c2410 systems
- *
- * Configure the GPIO for the S3C2410 system, where we have external FETs
- * connected to the device (later systems such as the S3C2440 integrate
- * these into the device).
-*/
-static inline void s3c2410_ts_connect(void)
-{
- s3c2410_gpio_cfgpin(S3C2410_GPG(12), S3C2410_GPG12_XMON);
- s3c2410_gpio_cfgpin(S3C2410_GPG(13), S3C2410_GPG13_nXPON);
- s3c2410_gpio_cfgpin(S3C2410_GPG(14), S3C2410_GPG14_YMON);
- s3c2410_gpio_cfgpin(S3C2410_GPG(15), S3C2410_GPG15_nYPON);
-}
-
-/**
* get_down - return the down state of the pen
* @data0: The data read from ADCDAT0 register.
* @data1: The data read from ADCDAT1 register.
@@ -128,27 +113,29 @@ static void touch_timer_fire(unsigned long data)
down = get_down(data0, data1);
- if (ts.count == (1 << ts.shift)) {
- ts.xp >>= ts.shift;
- ts.yp >>= ts.shift;
+ if (down) {
+ if (ts.count == (1 << ts.shift)) {
+ ts.xp >>= ts.shift;
+ ts.yp >>= ts.shift;
- dev_dbg(ts.dev, "%s: X=%lu, Y=%lu, count=%d\n",
- __func__, ts.xp, ts.yp, ts.count);
+ dev_dbg(ts.dev, "%s: X=%lu, Y=%lu, count=%d\n",
+ __func__, ts.xp, ts.yp, ts.count);
- input_report_abs(ts.input, ABS_X, ts.xp);
- input_report_abs(ts.input, ABS_Y, ts.yp);
+ input_report_abs(ts.input, ABS_X, ts.xp);
+ input_report_abs(ts.input, ABS_Y, ts.yp);
- input_report_key(ts.input, BTN_TOUCH, 1);
- input_sync(ts.input);
+ input_report_key(ts.input, BTN_TOUCH, 1);
+ input_sync(ts.input);
- ts.xp = 0;
- ts.yp = 0;
- ts.count = 0;
- }
+ ts.xp = 0;
+ ts.yp = 0;
+ ts.count = 0;
+ }
- if (down) {
s3c_adc_start(ts.client, 0, 1 << ts.shift);
} else {
+ ts.xp = 0;
+ ts.yp = 0;
ts.count = 0;
input_report_key(ts.input, BTN_TOUCH, 0);
@@ -185,7 +172,12 @@ static irqreturn_t stylus_irq(int irq, void *dev_id)
if (down)
s3c_adc_start(ts.client, 0, 1 << ts.shift);
else
- dev_info(ts.dev, "%s: count=%d\n", __func__, ts.count);
+ dev_dbg(ts.dev, "%s: count=%d\n", __func__, ts.count);
+
+ if (ts.features & FEAT_PEN_IRQ) {
+ /* Clear pen down/up interrupt */
+ writel(0x0, ts.io + S3C64XX_ADCCLRINTPNDNUP);
+ }
return IRQ_HANDLED;
}
@@ -245,7 +237,7 @@ static void s3c24xx_ts_select(struct s3c_adc_client *client, unsigned select)
* Initialise, find and allocate any resources we need to run and then
* register with the ADC and input systems.
*/
-static int __devinit s3c2410ts_probe(struct platform_device *pdev)
+static int s3c2410ts_probe(struct platform_device *pdev)
{
struct s3c2410_ts_mach_info *info;
struct device *dev = &pdev->dev;
@@ -258,7 +250,7 @@ static int __devinit s3c2410ts_probe(struct platform_device *pdev)
ts.dev = dev;
- info = pdev->dev.platform_data;
+ info = dev_get_platdata(&pdev->dev);
if (!info) {
dev_err(dev, "no platform data, cannot attach\n");
return -EINVAL;
@@ -295,9 +287,9 @@ static int __devinit s3c2410ts_probe(struct platform_device *pdev)
goto err_clk;
}
- /* Configure the touchscreen external FETs on the S3C2410 */
- if (!platform_get_device_id(pdev)->driver_data)
- s3c2410_ts_connect();
+ /* inititalise the gpio */
+ if (info->cfg_gpio)
+ info->cfg_gpio(to_platform_device(ts.dev));
ts.client = s3c_adc_register(pdev, s3c24xx_ts_select,
s3c24xx_ts_conversion, 1);
@@ -333,8 +325,9 @@ static int __devinit s3c2410ts_probe(struct platform_device *pdev)
ts.input->id.version = 0x0102;
ts.shift = info->oversampling_shift;
+ ts.features = platform_get_device_id(pdev)->driver_data;
- ret = request_irq(ts.irq_tc, stylus_irq, IRQF_DISABLED,
+ ret = request_irq(ts.irq_tc, stylus_irq, 0,
"s3c2410_ts_pen", ts.input);
if (ret) {
dev_err(dev, "cannot get TC interrupt\n");
@@ -356,7 +349,7 @@ static int __devinit s3c2410ts_probe(struct platform_device *pdev)
err_tcirq:
free_irq(ts.irq_tc, ts.input);
err_inputdev:
- input_unregister_device(ts.input);
+ input_free_device(ts.input);
err_iomap:
iounmap(ts.io);
err_clk:
@@ -371,7 +364,7 @@ static int __devinit s3c2410ts_probe(struct platform_device *pdev)
*
* Free up our state ready to be removed.
*/
-static int __devexit s3c2410ts_remove(struct platform_device *pdev)
+static int s3c2410ts_remove(struct platform_device *pdev)
{
free_irq(ts.irq_tc, ts.input);
del_timer_sync(&touch_timer);
@@ -398,9 +391,10 @@ static int s3c2410ts_suspend(struct device *dev)
static int s3c2410ts_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
- struct s3c2410_ts_mach_info *info = pdev->dev.platform_data;
+ struct s3c2410_ts_mach_info *info = dev_get_platdata(&pdev->dev);
clk_enable(ts.clock);
+ enable_irq(ts.irq_tc);
/* Initialise registers */
if ((info->delay & 0xffff) > 0)
@@ -411,7 +405,7 @@ static int s3c2410ts_resume(struct device *dev)
return 0;
}
-static struct dev_pm_ops s3c_ts_pmops = {
+static const struct dev_pm_ops s3c_ts_pmops = {
.suspend = s3c2410ts_suspend,
.resume = s3c2410ts_resume,
};
@@ -419,14 +413,15 @@ static struct dev_pm_ops s3c_ts_pmops = {
static struct platform_device_id s3cts_driver_ids[] = {
{ "s3c2410-ts", 0 },
- { "s3c2440-ts", 1 },
+ { "s3c2440-ts", 0 },
+ { "s3c64xx-ts", FEAT_PEN_IRQ },
{ }
};
MODULE_DEVICE_TABLE(platform, s3cts_driver_ids);
static struct platform_driver s3c_ts_driver = {
.driver = {
- .name = "s3c24xx-ts",
+ .name = "samsung-ts",
.owner = THIS_MODULE,
#ifdef CONFIG_PM
.pm = &s3c_ts_pmops,
@@ -434,21 +429,9 @@ static struct platform_driver s3c_ts_driver = {
},
.id_table = s3cts_driver_ids,
.probe = s3c2410ts_probe,
- .remove = __devexit_p(s3c2410ts_remove),
+ .remove = s3c2410ts_remove,
};
-
-static int __init s3c2410ts_init(void)
-{
- return platform_driver_register(&s3c_ts_driver);
-}
-
-static void __exit s3c2410ts_exit(void)
-{
- platform_driver_unregister(&s3c_ts_driver);
-}
-
-module_init(s3c2410ts_init);
-module_exit(s3c2410ts_exit);
+module_platform_driver(s3c_ts_driver);
MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>, "
"Ben Dooks <ben@simtec.co.uk>, "
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-13 06:46:22 +0000