From: Felipe Balbi <felipe.balbi@xxxxxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxx>
---
drivers/input/touchscreen/Kconfig | 6 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/tsc2301_ts.c | 676 ++++++++++++++++++++++++++++++++
3 files changed, 683 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/touchscreen/tsc2301_ts.c
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index f45cdac..1bab54a 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -236,6 +236,12 @@ config TOUCHSCREEN_TSC210X
To compile this driver as a module, choose M here: the
module will be called tsc210x_ts.
+config TOUCHSCREEN_TSC2301
+ tristate "TSC2301 touchscreen support"
+ depends on SPI_TSC2301
+ help
+ Say Y here for if you are using the touchscreen features of TSC2301.
+
config TOUCHSCREEN_UCB1400
tristate "Philips UCB1400 touchscreen"
select AC97_BUS
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 411c44a..d14ed30 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -29,6 +29,7 @@ obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o
obj-$(CONFIG_TOUCHSCREEN_TSC2005) += tsc2005.o
obj-$(CONFIG_TOUCHSCREEN_OMAP) += omap/
obj-$(CONFIG_TOUCHSCREEN_TSC210X) += tsc210x_ts.o
+obj-$(CONFIG_TOUCHSCREEN_TSC2301) += tsc2301_ts.o
obj-$(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/tsc2301_ts.c b/drivers/input/touchscreen/tsc2301_ts.c
new file mode 100644
index 0000000..6462cc2
--- /dev/null
+++ b/drivers/input/touchscreen/tsc2301_ts.c
@@ -0,0 +1,676 @@
+/*
+ * TSC2301 touchscreen driver
+ *
+ * Copyright (C) 2005-2008 Nokia Corporation
+ *
+ * Written by Jarkko Oikarinen, Imre Deak and Juha Yrjola
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+
+#include <linux/spi/tsc2301.h>
+
+/**
+ * The touchscreen interface operates as follows:
+ *
+ * Initialize:
+ * Request access to GPIO103 (DAV)
+ * tsc2301_ts_irq_handler will trigger when DAV line goes down
+ *
+ * 1) Pen is pressed against touchscreeen
+ * 2) TSC2301 performs AD conversion
+ * 3) After the conversion is done TSC2301 drives DAV line down
+ * 4) GPIO IRQ is received and tsc2301_ts_irq_handler is called
+ * 5) tsc2301_ts_irq_handler queues up an spi transfer to fetch
+ * the x, y, z1, z2 values
+ * 6) SPI framework calls tsc2301_ts_rx after the coordinates are read
+ * 7) When the penup_timer expires, there have not been DAV interrupts
+ * during the last 20ms which means the pen has been lifted.
+ */
+
+
+#define TSC2301_TOUCHSCREEN_PRODUCT_ID 0x0052
+#define TSC2301_TOUCHSCREEN_PRODUCT_VERSION 0x0001
+
+#define TSC2301_TS_PENUP_TIME 20
+
+#define TSC2301_ADCREG_CONVERSION_CTRL_BY_TSC2301 0x8000
+#define TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST 0x0000
+
+#define TSC2301_ADCREG_FUNCTION_NONE 0x0000
+#define TSC2301_ADCREG_FUNCTION_XY 0x0400
+#define TSC2301_ADCREG_FUNCTION_XYZ 0x0800
+#define TSC2301_ADCREG_FUNCTION_X 0x0C00
+#define TSC2301_ADCREG_FUNCTION_Y 0x1000
+#define TSC2301_ADCREG_FUNCTION_Z 0x1400
+#define TSC2301_ADCREG_FUNCTION_DAT1 0x1800
+#define TSC2301_ADCREG_FUNCTION_DAT2 0x1C00
+#define TSC2301_ADCREG_FUNCTION_AUX1 0x2000
+#define TSC2301_ADCREG_FUNCTION_AUX2 0x2400
+#define TSC2301_ADCREG_FUNCTION_TEMP 0x2800
+
+#define TSC2301_ADCREG_RESOLUTION_8BIT 0x0100
+#define TSC2301_ADCREG_RESOLUTION_10BIT 0x0200
+#define TSC2301_ADCREG_RESOLUTION_12BIT 0x0300
+
+#define TSC2301_ADCREG_AVERAGING_NONE 0x0000
+#define TSC2301_ADCREG_AVERAGING_4AVG 0x0040
+#define TSC2301_ADCREG_AVERAGING_8AVG 0x0080
+#define TSC2301_ADCREG_AVERAGING_16AVG 0x00C0
+
+#define TSC2301_ADCREG_CLOCK_8MHZ 0x0000
+#define TSC2301_ADCREG_CLOCK_4MHZ 0x0010
+#define TSC2301_ADCREG_CLOCK_2MHZ 0x0020
+#define TSC2301_ADCREG_CLOCK_1MHZ 0x0030
+
+#define TSC2301_ADCREG_VOLTAGE_STAB_0US 0x0000
+#define TSC2301_ADCREG_VOLTAGE_STAB_100US 0x0002
+#define TSC2301_ADCREG_VOLTAGE_STAB_500US 0x0004
+#define TSC2301_ADCREG_VOLTAGE_STAB_1MS 0x0006
+#define TSC2301_ADCREG_VOLTAGE_STAB_5MS 0x0008
+#define TSC2301_ADCREG_VOLTAGE_STAB_10MS 0x000A
+#define TSC2301_ADCREG_VOLTAGE_STAB_50MS 0x000C
+#define TSC2301_ADCREG_VOLTAGE_STAB_100MS 0x000E
+
+#define TSC2301_ADCREG_STOP_CONVERSION 0x4000
+
+#define MAX_12BIT ((1 << 12) - 1)
+
+#define TS_RECT_SIZE 8
+#define TSF_MIN_Z1 100
+#define TSF_MAX_Z2 4000
+
+#define TSF_SAMPLES 4
+
+struct ts_filter {
+ int sample_cnt;
+
+ int avg_x;
+ int avg_y;
+ int avg_z1;
+ int avg_z2;
+};
+
+struct ts_coords {
+ u16 x;
+ u16 y;
+ u16 z1;
+ u16 z2;
+};
+
+struct tsc2301_ts {
+ struct input_dev *idev;
+ char phys[32];
+ struct timer_list penup_timer;
+ struct mutex mutex;
+
+ struct spi_transfer read_xfer[2];
+ struct spi_message read_msg;
+ struct ts_coords *coords;
+
+ struct ts_filter filter;
+
+ int hw_avg_max;
+ u16 x;
+ u16 y;
+ u16 p;
+
+ u16 x_plate_ohm;
+ int stab_time;
+ int max_pressure;
+ int touch_pressure;
+
+ u8 event_sent;
+ u8 pen_down;
+ u8 disabled;
+ u8 disable_depth;
+
+ int hw_flags;
+ int irq;
+};
+
+
+static const u16 tsc2301_ts_read_data = 0x8000 | TSC2301_REG_X;
+
+static int tsc2301_ts_check_config(struct tsc2301_ts *ts, int *hw_flags)
+{
+ int flags;
+
+ flags = 0;
+ switch (ts->hw_avg_max) {
+ case 0:
+ flags |= TSC2301_ADCREG_AVERAGING_NONE;
+ break;
+ case 4:
+ flags |= TSC2301_ADCREG_AVERAGING_4AVG;
+ break;
+ case 8:
+ flags |= TSC2301_ADCREG_AVERAGING_8AVG;
+ break;
+ case 16:
+ flags |= TSC2301_ADCREG_AVERAGING_16AVG;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (ts->stab_time) {
+ case 0:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_0US;
+ break;
+ case 100:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_100US;
+ break;
+ case 500:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_500US;
+ break;
+ case 1000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_1MS;
+ break;
+ case 5000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_5MS;
+ break;
+ case 10000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_10MS;
+ break;
+ case 50000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_50MS;
+ break;
+ case 100000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_100MS;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ *hw_flags = flags;
+ return 0;
+}
+
+/*
+ * This odd three-time initialization is to work around a bug in TSC2301.
+ * See TSC2301 errata for details.
+ */
+static int tsc2301_ts_configure(struct tsc2301 *tsc, int flags)
+{
+ struct spi_transfer xfer[5];
+ struct spi_transfer *x;
+ struct spi_message m;
+ int i;
+ u16 val1, val2, val3;
+ u16 data[10];
+
+ val1 = TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST |
+ TSC2301_ADCREG_STOP_CONVERSION |
+ TSC2301_ADCREG_FUNCTION_NONE |
+ TSC2301_ADCREG_RESOLUTION_12BIT |
+ TSC2301_ADCREG_AVERAGING_NONE |
+ TSC2301_ADCREG_CLOCK_2MHZ |
+ TSC2301_ADCREG_VOLTAGE_STAB_100MS;
+
+ val2 = TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST |
+ TSC2301_ADCREG_FUNCTION_XYZ |
+ TSC2301_ADCREG_RESOLUTION_12BIT |
+ TSC2301_ADCREG_AVERAGING_16AVG |
+ TSC2301_ADCREG_CLOCK_1MHZ |
+ TSC2301_ADCREG_VOLTAGE_STAB_100MS;
+
+ /* Averaging and voltage stabilization settings in flags */
+ val3 = TSC2301_ADCREG_CONVERSION_CTRL_BY_TSC2301 |
+ TSC2301_ADCREG_FUNCTION_XYZ |
+ TSC2301_ADCREG_RESOLUTION_12BIT |
+ TSC2301_ADCREG_CLOCK_2MHZ |
+ flags;
+
+ /* Now we prepare the command for transferring */
+ data[0] = TSC2301_REG_ADC;
+ data[1] = val1;
+ data[2] = TSC2301_REG_ADC;
+ data[3] = val2;
+ data[4] = TSC2301_REG_ADC;
+ data[5] = val3;
+ data[6] = TSC2301_REG_REF;
+ data[7] = 1 << 4 | 1 << 2 | 1; /* intref, 100uS settl, 2.5V ref */
+ data[8] = TSC2301_REG_CONFIG;
+ data[9] = 3 << 3 | 2 << 0; /* 340uS pre-chrg, 544us delay */
+
+ spi_message_init(&m);
+ m.spi = tsc->spi;
+
+ memset(xfer, 0, sizeof(xfer));
+ x = &xfer[0];
+
+ for (i = 0; i < 10; i += 2) {
+ x->tx_buf = &data[i];
+ x->len = 4;
+ if (i != 8)
+ x->cs_change = 1;
+ spi_message_add_tail(x, &m);
+ x++;
+ }
+ spi_sync(m.spi, &m);
+
+ return 0;
+}
+
+static void tsc2301_ts_start_scan(struct tsc2301 *tsc)
+{
+ tsc2301_ts_configure(tsc, tsc->ts->hw_flags);
+ tsc2301_kp_restart(tsc);
+}
+
+static void tsc2301_ts_stop_scan(struct tsc2301 *tsc)
+{
+ tsc2301_write_reg(tsc, TSC2301_REG_ADC, TSC2301_ADCREG_STOP_CONVERSION);
+ tsc2301_kp_restart(tsc);
+}
+
+static void update_pen_state(struct tsc2301_ts *ts, int x, int y, int pressure)
+{
+ if (pressure) {
+ input_report_abs(ts->idev, ABS_X, x);
+ input_report_abs(ts->idev, ABS_Y, y);
+ input_report_abs(ts->idev, ABS_PRESSURE, pressure);
+ if (!ts->pen_down)
+ input_report_key(ts->idev, BTN_TOUCH, 1);
+ ts->pen_down = 1;
+ } else {
+ input_report_abs(ts->idev, ABS_PRESSURE, 0);
+ if (ts->pen_down)
+ input_report_key(ts->idev, BTN_TOUCH, 0);
+ ts->pen_down = 0;
+ }
+
+ input_sync(ts->idev);
+
+#ifdef VERBOSE
+ dev_dbg(&tsc->spi->dev, "x %4d y %4d p %4d\n", x, y, pressure);
+#endif
+}
+
+static int filter(struct tsc2301_ts *ts, int x, int y, int z1, int z2)
+{
+ int inside_rect, pressure_limit, Rt;
+ struct ts_filter *tsf = &ts->filter;
+
+ /* validate pressure and position */
+ if (x > MAX_12BIT || y > MAX_12BIT)
+ return 0;
+
+ /* skip coords if the pressure-components are out of range */
+ if (z1 < TSF_MIN_Z1 || z2 > TSF_MAX_Z2)
+ return 0;
+
+ /* Use the x,y,z1,z2 directly on the first "pen down" event */
+ if (ts->event_sent) {
+ tsf->avg_x += x;
+ tsf->avg_y += y;
+ tsf->avg_z1 += z1;
+ tsf->avg_z2 += z2;
+
+ if (++tsf->sample_cnt < TSF_SAMPLES)
+ return 0;
+ x = tsf->avg_x / TSF_SAMPLES;
+ y = tsf->avg_y / TSF_SAMPLES;
+ z1 = tsf->avg_z1 / TSF_SAMPLES;
+ z2 = tsf->avg_z2 / TSF_SAMPLES;
+ }
+ tsf->sample_cnt = 0;
+ tsf->avg_x = 0;
+ tsf->avg_y = 0;
+ tsf->avg_z1 = 0;
+ tsf->avg_z2 = 0;
+
+ pressure_limit = ts->event_sent? ts->max_pressure: ts->touch_pressure;
+
+ /* z1 is always at least 100: */
+ Rt = x * (z2 - z1) / z1;
+ Rt = Rt * ts->x_plate_ohm / 4096;
+ if (Rt > pressure_limit)
+ return 0;
+
+ /* discard the event if it still is within the previous rect - unless
+ * if the pressure is harder, but then use previous x,y position */
+ inside_rect = (
+ x > (int)ts->x - TS_RECT_SIZE && x < (int)ts->x + TS_RECT_SIZE &&
+ y > (int)ts->y - TS_RECT_SIZE && y < (int)ts->y + TS_RECT_SIZE);
+
+ if (!ts->event_sent || !inside_rect) {
+ ts->x = x;
+ ts->y = y;
+ ts->p = Rt;
+ return 1;
+ } else if (Rt < ts->p) {
+ ts->p = Rt;
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * This procedure is called by the SPI framework after the coordinates
+ * have been read from TSC2301
+ */
+static void tsc2301_ts_rx(void *arg)
+{
+ struct tsc2301 *tsc = arg;
+ struct tsc2301_ts *ts = tsc->ts;
+ int send_event;
+ int x, y, z1, z2;
+
+ x = ts->coords->x;
+ y = ts->coords->y;
+ z1 = ts->coords->z1;
+ z2 = ts->coords->z2;
+
+ send_event = filter(ts, x, y, z1, z2);
+ if (send_event) {
+ update_pen_state(ts, ts->x, ts->y, ts->p);
+ ts->event_sent = 1;
+ }
+
+ mod_timer(&ts->penup_timer,
+ jiffies + msecs_to_jiffies(TSC2301_TS_PENUP_TIME));
+}
+
+/*
+ * Timer is called TSC2301_TS_PENUP_TIME after pen is up
+ */
+static void tsc2301_ts_timer_handler(unsigned long data)
+{
+ struct tsc2301 *tsc = (struct tsc2301 *)data;
+ struct tsc2301_ts *ts = tsc->ts;
+
+ if (ts->event_sent) {
+ ts->event_sent = 0;
+ update_pen_state(ts, 0, 0, 0);
+ }
+}
+
+/*
+ * This interrupt is called when pen is down and coordinates are
+ * available. That is indicated by a falling edge on DEV line.
+ */
+static irqreturn_t tsc2301_ts_irq_handler(int irq, void *dev_id)
+{
+ struct tsc2301 *tsc = dev_id;
+ struct tsc2301_ts *ts = tsc->ts;
+ int r;
+
+ r = spi_async(tsc->spi, &ts->read_msg);
+ if (r)
+ dev_err(&tsc->spi->dev, "ts: spi_async() failed");
+
+ mod_timer(&ts->penup_timer,
+ jiffies + msecs_to_jiffies(TSC2301_TS_PENUP_TIME));
+
+ return IRQ_HANDLED;
+}
+
+static void tsc2301_ts_disable(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ if (ts->disable_depth++ != 0)
+ return;
+
+ disable_irq(ts->irq);
+
+ /* wait until penup timer expire normally */
+ do {
+ msleep(1);
+ } while (ts->event_sent);
+
+ tsc2301_ts_stop_scan(tsc);
+}
+
+static void tsc2301_ts_enable(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ if (--ts->disable_depth != 0)
+ return;
+
+ enable_irq(ts->irq);
+
+ tsc2301_ts_start_scan(tsc);
+}
+
+#ifdef CONFIG_PM
+int tsc2301_ts_suspend(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ mutex_lock(&ts->mutex);
+ tsc2301_ts_disable(tsc);
+ mutex_unlock(&ts->mutex);
+
+ return 0;
+}
+
+void tsc2301_ts_resume(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ mutex_lock(&ts->mutex);
+ tsc2301_ts_enable(tsc);
+ mutex_unlock(&ts->mutex);
+}
+#endif
+
+static void tsc2301_ts_setup_spi_xfer(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+ struct spi_message *m = &ts->read_msg;
+ struct spi_transfer *x = &ts->read_xfer[0];
+
+ spi_message_init(m);
+
+ x->tx_buf = &tsc2301_ts_read_data;
+ x->len = 2;
+ spi_message_add_tail(x, m);
+
+ x++;
+ x->rx_buf = ts->coords;
+ x->len = 8;
+ spi_message_add_tail(x, m);
+
+ m->complete = tsc2301_ts_rx;
+ m->context = tsc;
+}
+
+static ssize_t tsc2301_ts_pen_down_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", tsc->ts->pen_down);
+}
+
+static DEVICE_ATTR(pen_down, S_IRUGO, tsc2301_ts_pen_down_show, NULL);
+
+static ssize_t tsc2301_ts_disable_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+ struct tsc2301_ts *ts = tsc->ts;
+
+ return sprintf(buf, "%u\n", ts->disabled);
+}
+
+static ssize_t tsc2301_ts_disable_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+ struct tsc2301_ts *ts = tsc->ts;
+ char *endp;
+ int i;
+
+ i = simple_strtoul(buf, &endp, 10);
+ i = i ? 1 : 0;
+ mutex_lock(&ts->mutex);
+ if (i == ts->disabled) goto out;
+ ts->disabled = i;
+
+ if (i)
+ tsc2301_ts_disable(tsc);
+ else
+ tsc2301_ts_enable(tsc);
+out:
+ mutex_unlock(&ts->mutex);
+ return count;
+}
+
+static DEVICE_ATTR(disable_ts, 0664, tsc2301_ts_disable_show,
+ tsc2301_ts_disable_store);
+
+int __devinit tsc2301_ts_init(struct tsc2301 *tsc,
+ struct tsc2301_platform_data *pdata)
+{
+ struct tsc2301_ts *ts;
+ struct input_dev *idev;
+ int r;
+ int x_max, y_max;
+ int x_fudge, y_fudge, p_fudge;
+
+ if (pdata->dav_int <= 0) {
+ dev_err(&tsc->spi->dev, "need DAV IRQ");
+ return -EINVAL;
+ }
+
+ ts = kzalloc(sizeof(*ts), GFP_KERNEL);
+ if (ts == NULL)
+ return -ENOMEM;
+ tsc->ts = ts;
+
+ ts->coords = kzalloc(sizeof(*ts->coords), GFP_KERNEL);
+ if (ts->coords == NULL) {
+ kfree(ts);
+ return -ENOMEM;
+ }
+
+ ts->irq = pdata->dav_int;
+
+ init_timer(&ts->penup_timer);
+ setup_timer(&ts->penup_timer, tsc2301_ts_timer_handler,
+ (unsigned long)tsc);
+
+ mutex_init(&ts->mutex);
+
+ ts->x_plate_ohm = pdata->ts_x_plate_ohm ? : 280;
+ ts->hw_avg_max = pdata->ts_hw_avg;
+ ts->max_pressure = pdata->ts_max_pressure ? : MAX_12BIT;
+ ts->touch_pressure = pdata->ts_touch_pressure ? : ts->max_pressure;
+ ts->stab_time = pdata->ts_stab_time;
+
+ x_max = pdata->ts_x_max ? : 4096;
+ y_max = pdata->ts_y_max ? : 4096;
+ x_fudge = pdata->ts_x_fudge ? : 4;
+ y_fudge = pdata->ts_y_fudge ? : 8;
+ p_fudge = pdata->ts_pressure_fudge ? : 2;
+
+ if ((r = tsc2301_ts_check_config(ts, &ts->hw_flags))) {
+ dev_err(&tsc->spi->dev, "invalid configuration\n");
+ goto err2;
+ }
+
+ idev = input_allocate_device();
+ if (idev == NULL) {
+ r = -ENOMEM;
+ goto err2;
+ }
+ idev->name = "TSC2301 touchscreen";
+ snprintf(ts->phys, sizeof(ts->phys),
+ "%s/input-ts", tsc->spi->dev.bus_id);
+ idev->phys = ts->phys;
+ idev->dev.parent = &tsc->spi->dev;
+
+ idev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
+ idev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
+ ts->idev = idev;
+
+ tsc2301_ts_setup_spi_xfer(tsc);
+
+ /* These parameters should perhaps be configurable? */
+ input_set_abs_params(idev, ABS_X, 0, x_max, x_fudge, 0);
+ input_set_abs_params(idev, ABS_Y, 0, y_max, y_fudge, 0);
+ input_set_abs_params(idev, ABS_PRESSURE, 0, ts->max_pressure,
+ p_fudge, 0);
+
+ tsc2301_ts_start_scan(tsc);
+
+ r = request_irq(ts->irq, tsc2301_ts_irq_handler,
+ IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING,
+ "tsc2301-ts", tsc);
+ if (r < 0) {
+ dev_err(&tsc->spi->dev, "unable to get DAV IRQ");
+ goto err3;
+ }
+ set_irq_wake(ts->irq, 1);
+
+ if (device_create_file(&tsc->spi->dev, &dev_attr_pen_down) < 0)
+ goto err4;
+ if (device_create_file(&tsc->spi->dev, &dev_attr_disable_ts) < 0)
+ goto err5;
+
+ r = input_register_device(idev);
+ if (r < 0) {
+ dev_err(&tsc->spi->dev, "can't register touchscreen device\n");
+ goto err6;
+ }
+
+ return 0;
+err6:
+ device_remove_file(&tsc->spi->dev, &dev_attr_disable_ts);
+err5:
+ device_remove_file(&tsc->spi->dev, &dev_attr_pen_down);
+err4:
+ free_irq(ts->irq, tsc);
+err3:
+ tsc2301_ts_stop_scan(tsc);
+ input_free_device(idev);
+err2:
+ kfree(ts->coords);
+ kfree(ts);
+ return r;
+}
+
+void __devexit tsc2301_ts_exit(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ tsc2301_ts_disable(tsc);
+
+ device_remove_file(&tsc->spi->dev, &dev_attr_disable_ts);
+ device_remove_file(&tsc->spi->dev, &dev_attr_pen_down);
+
+ free_irq(ts->irq, tsc);
+ input_unregister_device(ts->idev);
+
+ kfree(ts->coords);
+ kfree(ts);
+}
+MODULE_AUTHOR("Jarkko Oikarinen <jarkko.oikarinen@xxxxxxxxx>");
+MODULE_LICENSE("GPL");
--
1.6.0.1.141.g445ca
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