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-rw-r--r--drivers/input/touchscreen/Kconfig10
-rw-r--r--drivers/input/touchscreen/Makefile1
-rw-r--r--drivers/input/touchscreen/ad7877.c19
-rw-r--r--drivers/input/touchscreen/ad7879-spi.c17
-rw-r--r--drivers/input/touchscreen/ads7846.c16
-rw-r--r--drivers/input/touchscreen/wm831x-ts.c363
6 files changed, 402 insertions, 24 deletions
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 61834ae282e1..258e43e98ec3 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -423,6 +423,16 @@ config TOUCHSCREEN_UCB1400
To compile this driver as a module, choose M here: the
module will be called ucb1400_ts.
+config TOUCHSCREEN_WM831X
+ tristate "Support for WM831x touchscreen controllers"
+ depends on MFD_WM831X
+ help
+ This enables support for the touchscreen controller on the WM831x
+ series of PMICs.
+
+ To compile this driver as a module, choose M here: the
+ module will be called wm831x-ts.
+
config TOUCHSCREEN_WM97XX
tristate "Support for WM97xx AC97 touchscreen controllers"
depends on AC97_BUS
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 718bcc814952..e8dcfab7c2dc 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -48,6 +48,7 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o
obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o
obj-$(CONFIG_TOUCHSCREEN_WACOM_W8001) += wacom_w8001.o
+obj-$(CONFIG_TOUCHSCREEN_WM831X) += wm831x-ts.o
obj-$(CONFIG_TOUCHSCREEN_WM97XX) += wm97xx-ts.o
wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9705) += wm9705.o
wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9712) += wm9712.o
diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c
index a1952fcc083e..714d4e0f9f95 100644
--- a/drivers/input/touchscreen/ad7877.c
+++ b/drivers/input/touchscreen/ad7877.c
@@ -41,6 +41,7 @@
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/interrupt.h>
+#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
#include <linux/spi/ad7877.h>
@@ -826,39 +827,37 @@ static int __devexit ad7877_remove(struct spi_device *spi)
return 0;
}
-#ifdef CONFIG_PM
-static int ad7877_suspend(struct spi_device *spi, pm_message_t message)
+#ifdef CONFIG_PM_SLEEP
+static int ad7877_suspend(struct device *dev)
{
- struct ad7877 *ts = dev_get_drvdata(&spi->dev);
+ struct ad7877 *ts = dev_get_drvdata(dev);
ad7877_disable(ts);
return 0;
}
-static int ad7877_resume(struct spi_device *spi)
+static int ad7877_resume(struct device *dev)
{
- struct ad7877 *ts = dev_get_drvdata(&spi->dev);
+ struct ad7877 *ts = dev_get_drvdata(dev);
ad7877_enable(ts);
return 0;
}
-#else
-#define ad7877_suspend NULL
-#define ad7877_resume NULL
#endif
+static SIMPLE_DEV_PM_OPS(ad7877_pm, ad7877_suspend, ad7877_resume);
+
static struct spi_driver ad7877_driver = {
.driver = {
.name = "ad7877",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
+ .pm = &ad7877_pm,
},
.probe = ad7877_probe,
.remove = __devexit_p(ad7877_remove),
- .suspend = ad7877_suspend,
- .resume = ad7877_resume,
};
static int __init ad7877_init(void)
diff --git a/drivers/input/touchscreen/ad7879-spi.c b/drivers/input/touchscreen/ad7879-spi.c
index 59c6e68c4325..ddf732f3cafc 100644
--- a/drivers/input/touchscreen/ad7879-spi.c
+++ b/drivers/input/touchscreen/ad7879-spi.c
@@ -7,6 +7,7 @@
*/
#include <linux/input.h> /* BUS_SPI */
+#include <linux/pm.h>
#include <linux/spi/spi.h>
#include "ad7879.h"
@@ -20,9 +21,10 @@
#define AD7879_WRITECMD(reg) (AD7879_CMD(reg))
#define AD7879_READCMD(reg) (AD7879_CMD(reg) | AD7879_CMD_READ)
-#ifdef CONFIG_PM
-static int ad7879_spi_suspend(struct spi_device *spi, pm_message_t message)
+#ifdef CONFIG_PM_SLEEP
+static int ad7879_spi_suspend(struct device *dev)
{
+ struct spi_device *spi = to_spi_device(dev);
struct ad7879 *ts = spi_get_drvdata(spi);
ad7879_suspend(ts);
@@ -30,19 +32,19 @@ static int ad7879_spi_suspend(struct spi_device *spi, pm_message_t message)
return 0;
}
-static int ad7879_spi_resume(struct spi_device *spi)
+static int ad7879_spi_resume(struct device *dev)
{
+ struct spi_device *spi = to_spi_device(dev);
struct ad7879 *ts = spi_get_drvdata(spi);
ad7879_resume(ts);
return 0;
}
-#else
-# define ad7879_spi_suspend NULL
-# define ad7879_spi_resume NULL
#endif
+static SIMPLE_DEV_PM_OPS(ad7879_spi_pm, ad7879_spi_suspend, ad7879_spi_resume);
+
/*
* ad7879_read/write are only used for initial setup and for sysfs controls.
* The main traffic is done in ad7879_collect().
@@ -173,11 +175,10 @@ static struct spi_driver ad7879_spi_driver = {
.name = "ad7879",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
+ .pm = &ad7879_spi_pm,
},
.probe = ad7879_spi_probe,
.remove = __devexit_p(ad7879_spi_remove),
- .suspend = ad7879_spi_suspend,
- .resume = ad7879_spi_resume,
};
static int __init ad7879_spi_init(void)
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 14ea54b78e46..b31e90f0d44b 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -26,6 +26,7 @@
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
+#include <linux/pm.h>
#include <linux/gpio.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>
@@ -892,9 +893,10 @@ static irqreturn_t ads7846_irq(int irq, void *handle)
return IRQ_HANDLED;
}
-static int ads7846_suspend(struct spi_device *spi, pm_message_t message)
+#ifdef CONFIG_PM_SLEEP
+static int ads7846_suspend(struct device *dev)
{
- struct ads7846 *ts = dev_get_drvdata(&spi->dev);
+ struct ads7846 *ts = dev_get_drvdata(dev);
mutex_lock(&ts->lock);
@@ -914,9 +916,9 @@ static int ads7846_suspend(struct spi_device *spi, pm_message_t message)
return 0;
}
-static int ads7846_resume(struct spi_device *spi)
+static int ads7846_resume(struct device *dev)
{
- struct ads7846 *ts = dev_get_drvdata(&spi->dev);
+ struct ads7846 *ts = dev_get_drvdata(dev);
mutex_lock(&ts->lock);
@@ -935,6 +937,9 @@ static int ads7846_resume(struct spi_device *spi)
return 0;
}
+#endif
+
+static SIMPLE_DEV_PM_OPS(ads7846_pm, ads7846_suspend, ads7846_resume);
static int __devinit ads7846_setup_pendown(struct spi_device *spi, struct ads7846 *ts)
{
@@ -1402,11 +1407,10 @@ static struct spi_driver ads7846_driver = {
.name = "ads7846",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
+ .pm = &ads7846_pm,
},
.probe = ads7846_probe,
.remove = __devexit_p(ads7846_remove),
- .suspend = ads7846_suspend,
- .resume = ads7846_resume,
};
static int __init ads7846_init(void)
diff --git a/drivers/input/touchscreen/wm831x-ts.c b/drivers/input/touchscreen/wm831x-ts.c
new file mode 100644
index 000000000000..1022f715d3c2
--- /dev/null
+++ b/drivers/input/touchscreen/wm831x-ts.c
@@ -0,0 +1,363 @@
+/*
+ * Touchscreen driver for WM831x PMICs
+ *
+ * Copyright 2011 Wolfson Microelectronics plc.
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/pm.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/mfd/wm831x/core.h>
+#include <linux/mfd/wm831x/irq.h>
+#include <linux/mfd/wm831x/pdata.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+/*
+ * R16424 (0x4028) - Touch Control 1
+ */
+#define WM831X_TCH_ENA 0x8000 /* TCH_ENA */
+#define WM831X_TCH_CVT_ENA 0x4000 /* TCH_CVT_ENA */
+#define WM831X_TCH_SLPENA 0x1000 /* TCH_SLPENA */
+#define WM831X_TCH_Z_ENA 0x0400 /* TCH_Z_ENA */
+#define WM831X_TCH_Y_ENA 0x0200 /* TCH_Y_ENA */
+#define WM831X_TCH_X_ENA 0x0100 /* TCH_X_ENA */
+#define WM831X_TCH_DELAY_MASK 0x00E0 /* TCH_DELAY - [7:5] */
+#define WM831X_TCH_DELAY_SHIFT 5 /* TCH_DELAY - [7:5] */
+#define WM831X_TCH_DELAY_WIDTH 3 /* TCH_DELAY - [7:5] */
+#define WM831X_TCH_RATE_MASK 0x001F /* TCH_RATE - [4:0] */
+#define WM831X_TCH_RATE_SHIFT 0 /* TCH_RATE - [4:0] */
+#define WM831X_TCH_RATE_WIDTH 5 /* TCH_RATE - [4:0] */
+
+/*
+ * R16425 (0x4029) - Touch Control 2
+ */
+#define WM831X_TCH_PD_WK 0x2000 /* TCH_PD_WK */
+#define WM831X_TCH_5WIRE 0x1000 /* TCH_5WIRE */
+#define WM831X_TCH_PDONLY 0x0800 /* TCH_PDONLY */
+#define WM831X_TCH_ISEL 0x0100 /* TCH_ISEL */
+#define WM831X_TCH_RPU_MASK 0x000F /* TCH_RPU - [3:0] */
+#define WM831X_TCH_RPU_SHIFT 0 /* TCH_RPU - [3:0] */
+#define WM831X_TCH_RPU_WIDTH 4 /* TCH_RPU - [3:0] */
+
+/*
+ * R16426-8 (0x402A-C) - Touch Data X/Y/X
+ */
+#define WM831X_TCH_PD 0x8000 /* TCH_PD1 */
+#define WM831X_TCH_DATA_MASK 0x0FFF /* TCH_DATA - [11:0] */
+#define WM831X_TCH_DATA_SHIFT 0 /* TCH_DATA - [11:0] */
+#define WM831X_TCH_DATA_WIDTH 12 /* TCH_DATA - [11:0] */
+
+struct wm831x_ts {
+ struct input_dev *input_dev;
+ struct wm831x *wm831x;
+ unsigned int data_irq;
+ unsigned int pd_irq;
+ bool pressure;
+ bool pen_down;
+};
+
+static irqreturn_t wm831x_ts_data_irq(int irq, void *irq_data)
+{
+ struct wm831x_ts *wm831x_ts = irq_data;
+ struct wm831x *wm831x = wm831x_ts->wm831x;
+ static int data_types[] = { ABS_X, ABS_Y, ABS_PRESSURE };
+ u16 data[3];
+ int count;
+ int i, ret;
+
+ if (wm831x_ts->pressure)
+ count = 3;
+ else
+ count = 2;
+
+ wm831x_set_bits(wm831x, WM831X_INTERRUPT_STATUS_1,
+ WM831X_TCHDATA_EINT, WM831X_TCHDATA_EINT);
+
+ ret = wm831x_bulk_read(wm831x, WM831X_TOUCH_DATA_X, count,
+ data);
+ if (ret != 0) {
+ dev_err(wm831x->dev, "Failed to read touch data: %d\n",
+ ret);
+ return IRQ_NONE;
+ }
+
+ /*
+ * We get a pen down reading on every reading, report pen up if any
+ * individual reading does so.
+ */
+ wm831x_ts->pen_down = true;
+ for (i = 0; i < count; i++) {
+ if (!(data[i] & WM831X_TCH_PD)) {
+ wm831x_ts->pen_down = false;
+ continue;
+ }
+ input_report_abs(wm831x_ts->input_dev, data_types[i],
+ data[i] & WM831X_TCH_DATA_MASK);
+ }
+
+ if (!wm831x_ts->pen_down) {
+ disable_irq_nosync(wm831x_ts->data_irq);
+
+ /* Don't need data any more */
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1,
+ WM831X_TCH_X_ENA | WM831X_TCH_Y_ENA |
+ WM831X_TCH_Z_ENA, 0);
+
+ /* Flush any final samples that arrived while reading */
+ wm831x_set_bits(wm831x, WM831X_INTERRUPT_STATUS_1,
+ WM831X_TCHDATA_EINT, WM831X_TCHDATA_EINT);
+
+ wm831x_bulk_read(wm831x, WM831X_TOUCH_DATA_X, count, data);
+
+ if (wm831x_ts->pressure)
+ input_report_abs(wm831x_ts->input_dev,
+ ABS_PRESSURE, 0);
+
+ input_report_key(wm831x_ts->input_dev, BTN_TOUCH, 0);
+ }
+
+ input_sync(wm831x_ts->input_dev);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t wm831x_ts_pen_down_irq(int irq, void *irq_data)
+{
+ struct wm831x_ts *wm831x_ts = irq_data;
+ struct wm831x *wm831x = wm831x_ts->wm831x;
+ int ena = 0;
+
+ /* Start collecting data */
+ if (wm831x_ts->pressure)
+ ena |= WM831X_TCH_Z_ENA;
+
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1,
+ WM831X_TCH_X_ENA | WM831X_TCH_Y_ENA | WM831X_TCH_Z_ENA,
+ WM831X_TCH_X_ENA | WM831X_TCH_Y_ENA | ena);
+
+ input_report_key(wm831x_ts->input_dev, BTN_TOUCH, 1);
+ input_sync(wm831x_ts->input_dev);
+
+ wm831x_set_bits(wm831x, WM831X_INTERRUPT_STATUS_1,
+ WM831X_TCHPD_EINT, WM831X_TCHPD_EINT);
+
+ wm831x_ts->pen_down = true;
+ enable_irq(wm831x_ts->data_irq);
+
+ return IRQ_HANDLED;
+}
+
+static int wm831x_ts_input_open(struct input_dev *idev)
+{
+ struct wm831x_ts *wm831x_ts = input_get_drvdata(idev);
+ struct wm831x *wm831x = wm831x_ts->wm831x;
+
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1,
+ WM831X_TCH_ENA, WM831X_TCH_ENA);
+
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1,
+ WM831X_TCH_CVT_ENA, WM831X_TCH_CVT_ENA);
+
+ return 0;
+}
+
+static void wm831x_ts_input_close(struct input_dev *idev)
+{
+ struct wm831x_ts *wm831x_ts = input_get_drvdata(idev);
+ struct wm831x *wm831x = wm831x_ts->wm831x;
+
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1,
+ WM831X_TCH_ENA | WM831X_TCH_CVT_ENA |
+ WM831X_TCH_X_ENA | WM831X_TCH_Y_ENA |
+ WM831X_TCH_Z_ENA, 0);
+
+ if (wm831x_ts->pen_down)
+ disable_irq(wm831x_ts->data_irq);
+}
+
+static __devinit int wm831x_ts_probe(struct platform_device *pdev)
+{
+ struct wm831x_ts *wm831x_ts;
+ struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
+ struct wm831x_pdata *core_pdata = dev_get_platdata(pdev->dev.parent);
+ struct wm831x_touch_pdata *pdata = NULL;
+ struct input_dev *input_dev;
+ int error;
+
+ if (core_pdata)
+ pdata = core_pdata->touch;
+
+ wm831x_ts = kzalloc(sizeof(struct wm831x_ts), GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!wm831x_ts || !input_dev) {
+ error = -ENOMEM;
+ goto err_alloc;
+ }
+
+ wm831x_ts->wm831x = wm831x;
+ wm831x_ts->input_dev = input_dev;
+
+ /*
+ * If we have a direct IRQ use it, otherwise use the interrupt
+ * from the WM831x IRQ controller.
+ */
+ if (pdata && pdata->data_irq)
+ wm831x_ts->data_irq = pdata->data_irq;
+ else
+ wm831x_ts->data_irq = platform_get_irq_byname(pdev, "TCHDATA");
+
+ if (pdata && pdata->pd_irq)
+ wm831x_ts->pd_irq = pdata->pd_irq;
+ else
+ wm831x_ts->pd_irq = platform_get_irq_byname(pdev, "TCHPD");
+
+ wm831x_ts->pressure = pdata && pdata->pressure;
+
+ /* Five wire touchscreens can't report pressure */
+ if (pdata && pdata->fivewire) {
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2,
+ WM831X_TCH_5WIRE, WM831X_TCH_5WIRE);
+
+ /* Pressure measurements are not possible for five wire mode */
+ WARN_ON(pdata->pressure && pdata->fivewire);
+ wm831x_ts->pressure = false;
+ } else {
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2,
+ WM831X_TCH_5WIRE, 0);
+ }
+
+ if (pdata) {
+ switch (pdata->isel) {
+ default:
+ dev_err(&pdev->dev, "Unsupported ISEL setting: %d\n",
+ pdata->isel);
+ /* Fall through */
+ case 200:
+ case 0:
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2,
+ WM831X_TCH_ISEL, 0);
+ break;
+ case 400:
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2,
+ WM831X_TCH_ISEL, WM831X_TCH_ISEL);
+ break;
+ }
+ }
+
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2,
+ WM831X_TCH_PDONLY, 0);
+
+ /* Default to 96 samples/sec */
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1,
+ WM831X_TCH_RATE_MASK, 6);
+
+ error = request_threaded_irq(wm831x_ts->data_irq,
+ NULL, wm831x_ts_data_irq,
+ IRQF_ONESHOT,
+ "Touchscreen data", wm831x_ts);
+ if (error) {
+ dev_err(&pdev->dev, "Failed to request data IRQ %d: %d\n",
+ wm831x_ts->data_irq, error);
+ goto err_alloc;
+ }
+ disable_irq(wm831x_ts->data_irq);
+
+ error = request_threaded_irq(wm831x_ts->pd_irq,
+ NULL, wm831x_ts_pen_down_irq,
+ IRQF_ONESHOT,
+ "Touchscreen pen down", wm831x_ts);
+ if (error) {
+ dev_err(&pdev->dev, "Failed to request pen down IRQ %d: %d\n",
+ wm831x_ts->pd_irq, error);
+ goto err_data_irq;
+ }
+
+ /* set up touch configuration */
+ input_dev->name = "WM831x touchscreen";
+ input_dev->phys = "wm831x";
+ input_dev->open = wm831x_ts_input_open;
+ input_dev->close = wm831x_ts_input_close;
+
+ __set_bit(EV_ABS, input_dev->evbit);
+ __set_bit(EV_KEY, input_dev->evbit);
+ __set_bit(BTN_TOUCH, input_dev->keybit);
+
+ input_set_abs_params(input_dev, ABS_X, 0, 4095, 5, 0);
+ input_set_abs_params(input_dev, ABS_Y, 0, 4095, 5, 0);
+ if (wm831x_ts->pressure)
+ input_set_abs_params(input_dev, ABS_PRESSURE, 0, 4095, 5, 0);
+
+ input_set_drvdata(input_dev, wm831x_ts);
+ input_dev->dev.parent = &pdev->dev;
+
+ error = input_register_device(input_dev);
+ if (error)
+ goto err_pd_irq;
+
+ platform_set_drvdata(pdev, wm831x_ts);
+ return 0;
+
+err_pd_irq:
+ free_irq(wm831x_ts->pd_irq, wm831x_ts);
+err_data_irq:
+ free_irq(wm831x_ts->data_irq, wm831x_ts);
+err_alloc:
+ input_free_device(input_dev);
+ kfree(wm831x_ts);
+
+ return error;
+}
+
+static __devexit int wm831x_ts_remove(struct platform_device *pdev)
+{
+ struct wm831x_ts *wm831x_ts = platform_get_drvdata(pdev);
+
+ free_irq(wm831x_ts->pd_irq, wm831x_ts);
+ free_irq(wm831x_ts->data_irq, wm831x_ts);
+ input_unregister_device(wm831x_ts->input_dev);
+ kfree(wm831x_ts);
+
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static struct platform_driver wm831x_ts_driver = {
+ .driver = {
+ .name = "wm831x-touch",
+ .owner = THIS_MODULE,
+ },
+ .probe = wm831x_ts_probe,
+ .remove = __devexit_p(wm831x_ts_remove),
+};
+
+static int __init wm831x_ts_init(void)
+{
+ return platform_driver_register(&wm831x_ts_driver);
+}
+module_init(wm831x_ts_init);
+
+static void __exit wm831x_ts_exit(void)
+{
+ platform_driver_unregister(&wm831x_ts_driver);
+}
+module_exit(wm831x_ts_exit);
+
+/* Module information */
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("WM831x PMIC touchscreen driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:wm831x-touch");
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-24 19:38:50 +0000