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    SubjectSupport for synaptic touchscreen in HTC dream
    From: Arve Hj?nnev?g <arve@android.com>

    This adds support for synaptic touchscreen, used in HTC dream
    cellphone.

    Signed-off-by: Pavel Machek <pavel@ucw.cz>

    diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
    index bb6486a..fa3404f 100644
    --- a/drivers/input/touchscreen/Kconfig
    +++ b/drivers/input/touchscreen/Kconfig
    @@ -206,6 +213,14 @@ config TOUCHSCREEN_MIGOR
    To compile this driver as a module, choose M here: the
    module will be called migor_ts.

    +config TOUCHSCREEN_SYNAPTICS_I2C_RMI
    + tristate "Synaptics i2c touchscreen"
    + depends on I2C
    + help
    + This enables support for Synaptics RMI over I2C based touchscreens.
    + Such touchscreen is used in HTC Dream.
    +
    +
    config TOUCHSCREEN_TOUCHRIGHT
    tristate "Touchright serial touchscreen"
    select SERIO
    diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
    index d3375af..959dcda 100644
    --- a/drivers/input/touchscreen/Makefile
    +++ b/drivers/input/touchscreen/Makefile
    @@ -22,6 +23,7 @@ obj-$(CONFIG_TOUCHSCREEN_HP7XX) += jornada720_ts.o
    obj-$(CONFIG_TOUCHSCREEN_HTCPEN) += htcpen.o
    obj-$(CONFIG_TOUCHSCREEN_USB_COMPOSITE) += usbtouchscreen.o
    obj-$(CONFIG_TOUCHSCREEN_PENMOUNT) += penmount.o
    +obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI) += synaptics_i2c_rmi.o
    obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o
    obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
    obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
    diff --git a/drivers/input/touchscreen/synaptics_i2c_rmi.c b/drivers/input/touchscreen/synaptics_i2c_rmi.c
    new file mode 100644
    index 0000000..fe10e85
    --- /dev/null
    +++ b/drivers/input/touchscreen/synaptics_i2c_rmi.c
    @@ -0,0 +1,587 @@
    +/*
    + * Support for synaptics touchscreen.
    + *
    + * Copyright (C) 2007 Google, Inc.
    + * Author: Arve Hj?nnev?g <arve@android.com>
    + *
    + * This software is licensed under the terms of the GNU General Public
    + * License version 2, as published by the Free Software Foundation, and
    + * may be copied, distributed, and modified under those terms.
    + *
    + * 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.
    + *
    + */
    +
    +#include <linux/module.h>
    +#include <linux/delay.h>
    +#include <linux/hrtimer.h>
    +#include <linux/i2c.h>
    +#include <linux/input.h>
    +#include <linux/interrupt.h>
    +#include <linux/io.h>
    +#include <linux/platform_device.h>
    +#include <linux/synaptics_i2c_rmi.h>
    +
    +static struct workqueue_struct *synaptics_wq;
    +
    +struct synaptics_ts_data {
    + u16 addr;
    + struct i2c_client *client;
    + struct input_dev *input_dev;
    + int use_irq;
    + struct hrtimer timer;
    + struct work_struct work;
    + u16 max[2];
    + int snap_state[2][2];
    + int snap_down_on[2];
    + int snap_down_off[2];
    + int snap_up_on[2];
    + int snap_up_off[2];
    + int snap_down[2];
    + int snap_up[2];
    + u32 flags;
    + int (*power)(int on);
    +};
    +
    +static int i2c_set(struct synaptics_ts_data *ts, u8 reg, u8 val, char *msg)
    +{
    + int ret = i2c_smbus_write_byte_data(ts->client, reg, val);
    + if (ret < 0)
    + pr_err("i2c_smbus_write_byte_data failed (%s)\n", msg);
    + return ret;
    +}
    +
    +static int i2c_read(struct synaptics_ts_data *ts, u8 reg, char *msg)
    +{
    + int ret = i2c_smbus_read_byte_data(ts->client, 0xf0);
    + if (ret < 0)
    + pr_err("i2c_smbus_read_byte_data failed (%s)\n", msg);
    + return ret;
    +}
    +
    +static int synaptics_init_panel(struct synaptics_ts_data *ts)
    +{
    + int ret;
    +
    + ret = i2c_set(ts, 0xff, 0x10, "set page select");
    + if (ret == 0)
    + ret = i2c_set(ts, 0x41, 0x04, "set No Clip Z");
    +
    + ret = i2c_set(ts, 0xff, 0x04, "fallback page select");
    + ret = i2c_set(ts, 0xf0, 0x81, "select 80 reports per second");
    + return ret;
    +}
    +
    +static void decode_report(struct synaptics_ts_data *ts, u8 *buf)
    +{
    + int pos[2][2];
    + int f, a;
    + int base = 2;
    + int z = buf[1];
    + int w = buf[0] >> 4;
    + int finger = buf[0] & 7;
    + int finger2_pressed;
    +
    + for (f = 0; f < 2; f++) {
    + u32 flip_flag = SYNAPTICS_FLIP_X;
    + for (a = 0; a < 2; a++) {
    + int p = buf[base + 1];
    + p |= (u16)(buf[base] & 0x1f) << 8;
    + if (ts->flags & flip_flag)
    + p = ts->max[a] - p;
    + if (ts->flags & SYNAPTICS_SNAP_TO_INACTIVE_EDGE) {
    + if (ts->snap_state[f][a]) {
    + if (p <= ts->snap_down_off[a])
    + p = ts->snap_down[a];
    + else if (p >= ts->snap_up_off[a])
    + p = ts->snap_up[a];
    + else
    + ts->snap_state[f][a] = 0;
    + } else {
    + if (p <= ts->snap_down_on[a]) {
    + p = ts->snap_down[a];
    + ts->snap_state[f][a] = 1;
    + } else if (p >= ts->snap_up_on[a]) {
    + p = ts->snap_up[a];
    + ts->snap_state[f][a] = 1;
    + }
    + }
    + }
    + pos[f][a] = p;
    + base += 2;
    + flip_flag <<= 1;
    + }
    + base += 2;
    + if (ts->flags & SYNAPTICS_SWAP_XY)
    + swap(pos[f][0], pos[f][1]);
    + }
    + if (z) {
    + input_report_abs(ts->input_dev, ABS_X, pos[0][0]);
    + input_report_abs(ts->input_dev, ABS_Y, pos[0][1]);
    + }
    + input_report_abs(ts->input_dev, ABS_PRESSURE, z);
    + input_report_abs(ts->input_dev, ABS_TOOL_WIDTH, w);
    + input_report_key(ts->input_dev, BTN_TOUCH, finger);
    + finger2_pressed = finger > 1 && finger != 7;
    + input_report_key(ts->input_dev, BTN_2, finger2_pressed);
    + if (finger2_pressed) {
    + input_report_abs(ts->input_dev, ABS_HAT0X, pos[1][0]);
    + input_report_abs(ts->input_dev, ABS_HAT0Y, pos[1][1]);
    + }
    + input_sync(ts->input_dev);
    +}
    +
    +static void synaptics_ts_work_func(struct work_struct *work)
    +{
    + int i;
    + int ret;
    + int bad_data = 0;
    + struct i2c_msg msg[2];
    + u8 start_reg = 0;
    + u8 buf[15];
    + struct synaptics_ts_data *ts =
    + container_of(work, struct synaptics_ts_data, work);
    +
    + msg[0].addr = ts->client->addr;
    + msg[0].flags = 0;
    + msg[0].len = 1;
    + msg[0].buf = &start_reg;
    + msg[1].addr = ts->client->addr;
    + msg[1].flags = I2C_M_RD;
    + msg[1].len = sizeof(buf);
    + msg[1].buf = buf;
    +
    + for (i = 0; i < ((ts->use_irq && !bad_data) ? 1 : 10); i++) {
    + ret = i2c_transfer(ts->client->adapter, msg, 2);
    + if (ret < 0) {
    + printk(KERN_ERR "ts_work: i2c_transfer failed\n");
    + bad_data = 1;
    + continue;
    + }
    + if ((buf[14] & 0xc0) != 0x40) {
    + printk(KERN_WARNING "synaptics_ts_work_func:"
    + " bad read %x %x %x %x %x %x %x %x %x"
    + " %x %x %x %x %x %x, ret %d\n",
    + buf[0], buf[1], buf[2], buf[3],
    + buf[4], buf[5], buf[6], buf[7],
    + buf[8], buf[9], buf[10], buf[11],
    + buf[12], buf[13], buf[14], ret);
    + if (bad_data)
    + synaptics_init_panel(ts);
    + bad_data = 1;
    + continue;
    + }
    + bad_data = 0;
    + if ((buf[14] & 1) == 0)
    + break;
    +
    + decode_report(ts, buf);
    + }
    + if (ts->use_irq)
    + enable_irq(ts->client->irq);
    +}
    +
    +static enum hrtimer_restart synaptics_ts_timer_func(struct hrtimer *timer)
    +{
    + struct synaptics_ts_data *ts =
    + container_of(timer, struct synaptics_ts_data, timer);
    +
    + queue_work(synaptics_wq, &ts->work);
    +
    + hrtimer_start(&ts->timer, ktime_set(0, 12500000), HRTIMER_MODE_REL);
    + return HRTIMER_NORESTART;
    +}
    +
    +static irqreturn_t synaptics_ts_irq_handler(int irq, void *dev_id)
    +{
    + struct synaptics_ts_data *ts = dev_id;
    +
    + disable_irq(ts->client->irq);
    + queue_work(synaptics_wq, &ts->work);
    + return IRQ_HANDLED;
    +}
    +
    +static int detect(struct synaptics_ts_data *ts, u32 *panel_version)
    +{
    + int ret;
    + int retry = 10;
    +
    + ret = i2c_set(ts, 0xf4, 0x01, "reset device");
    +
    + while (retry-- > 0) {
    + ret = i2c_smbus_read_byte_data(ts->client, 0xe4);
    + if (ret >= 0)
    + break;
    + msleep(100);
    + }
    + if (ret < 0) {
    + pr_err("i2c_smbus_read_byte_data failed\n");
    + return ret;
    + }
    +
    + *panel_version = ret << 8;
    + ret = i2c_read(ts, 0xe5, "product minor");
    + if (ret < 0)
    + return ret;
    + *panel_version |= ret;
    +
    + ret = i2c_read(ts, 0xe3, "property");
    + if (ret < 0)
    + return ret;
    +
    + pr_info("synaptics: version %x, product property %x\n",
    + *panel_version, ret);
    + return 0;
    +}
    +
    +static void compute_areas(struct synaptics_ts_data *ts,
    + struct synaptics_i2c_rmi_platform_data *pdata,
    + u16 max_x, u16 max_y)
    +{
    + u32 inactive_area_left;
    + u32 inactive_area_right;
    + u32 inactive_area_top;
    + u32 inactive_area_bottom;
    + u32 snap_left_on;
    + u32 snap_left_off;
    + u32 snap_right_on;
    + u32 snap_right_off;
    + u32 snap_top_on;
    + u32 snap_top_off;
    + u32 snap_bottom_on;
    + u32 snap_bottom_off;
    + u32 fuzz_x;
    + u32 fuzz_y;
    + int fuzz_p;
    + int fuzz_w;
    + int swapped = !!(ts->flags & SYNAPTICS_SWAP_XY);
    +
    + inactive_area_left = pdata->inactive_left;
    + inactive_area_right = pdata->inactive_right;
    + inactive_area_top = pdata->inactive_top;
    + inactive_area_bottom = pdata->inactive_bottom;
    + snap_left_on = pdata->snap_left_on;
    + snap_left_off = pdata->snap_left_off;
    + snap_right_on = pdata->snap_right_on;
    + snap_right_off = pdata->snap_right_off;
    + snap_top_on = pdata->snap_top_on;
    + snap_top_off = pdata->snap_top_off;
    + snap_bottom_on = pdata->snap_bottom_on;
    + snap_bottom_off = pdata->snap_bottom_off;
    + fuzz_x = pdata->fuzz_x;
    + fuzz_y = pdata->fuzz_y;
    + fuzz_p = pdata->fuzz_p;
    + fuzz_w = pdata->fuzz_w;
    +
    + inactive_area_left = inactive_area_left * max_x / 0x10000;
    + inactive_area_right = inactive_area_right * max_x / 0x10000;
    + inactive_area_top = inactive_area_top * max_y / 0x10000;
    + inactive_area_bottom = inactive_area_bottom * max_y / 0x10000;
    + snap_left_on = snap_left_on * max_x / 0x10000;
    + snap_left_off = snap_left_off * max_x / 0x10000;
    + snap_right_on = snap_right_on * max_x / 0x10000;
    + snap_right_off = snap_right_off * max_x / 0x10000;
    + snap_top_on = snap_top_on * max_y / 0x10000;
    + snap_top_off = snap_top_off * max_y / 0x10000;
    + snap_bottom_on = snap_bottom_on * max_y / 0x10000;
    + snap_bottom_off = snap_bottom_off * max_y / 0x10000;
    + fuzz_x = fuzz_x * max_x / 0x10000;
    + fuzz_y = fuzz_y * max_y / 0x10000;
    +
    +
    + ts->snap_down[swapped] = -inactive_area_left;
    + ts->snap_up[swapped] = max_x + inactive_area_right;
    + ts->snap_down[!swapped] = -inactive_area_top;
    + ts->snap_up[!swapped] = max_y + inactive_area_bottom;
    + ts->snap_down_on[swapped] = snap_left_on;
    + ts->snap_down_off[swapped] = snap_left_off;
    + ts->snap_up_on[swapped] = max_x - snap_right_on;
    + ts->snap_up_off[swapped] = max_x - snap_right_off;
    + ts->snap_down_on[!swapped] = snap_top_on;
    + ts->snap_down_off[!swapped] = snap_top_off;
    + ts->snap_up_on[!swapped] = max_y - snap_bottom_on;
    + ts->snap_up_off[!swapped] = max_y - snap_bottom_off;
    + pr_info("synaptics_ts_probe: max_x %d, max_y %d\n", max_x, max_y);
    + pr_info("synaptics_ts_probe: inactive_x %d %d, inactive_y %d %d\n",
    + inactive_area_left, inactive_area_right,
    + inactive_area_top, inactive_area_bottom);
    + pr_info("synaptics_ts_probe: snap_x %d-%d %d-%d, snap_y %d-%d %d-%d\n",
    + snap_left_on, snap_left_off, snap_right_on, snap_right_off,
    + snap_top_on, snap_top_off, snap_bottom_on, snap_bottom_off);
    +
    + input_set_abs_params(ts->input_dev, ABS_X,
    + -inactive_area_left, max_x + inactive_area_right,
    + fuzz_x, 0);
    + input_set_abs_params(ts->input_dev, ABS_Y,
    + -inactive_area_top, max_y + inactive_area_bottom,
    + fuzz_y, 0);
    + input_set_abs_params(ts->input_dev, ABS_PRESSURE, 0, 255, fuzz_p, 0);
    + input_set_abs_params(ts->input_dev, ABS_TOOL_WIDTH, 0, 15, fuzz_w, 0);
    + input_set_abs_params(ts->input_dev, ABS_HAT0X, -inactive_area_left,
    + max_x + inactive_area_right, fuzz_x, 0);
    + input_set_abs_params(ts->input_dev, ABS_HAT0Y, -inactive_area_top,
    + max_y + inactive_area_bottom, fuzz_y, 0);
    +}
    +
    +static int synaptics_ts_probe(
    + struct i2c_client *client, const struct i2c_device_id *id)
    +{
    + struct synaptics_ts_data *ts;
    + u8 buf0[4];
    + u8 buf1[8];
    + struct i2c_msg msg[2];
    + int ret = 0;
    + struct synaptics_i2c_rmi_platform_data *pdata;
    + u32 panel_version = 0;
    + u16 max_x, max_y;
    +
    + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
    + printk(KERN_ERR "synaptics_ts_probe: need I2C_FUNC_I2C\n");
    + ret = -ENODEV;
    + goto err_check_functionality_failed;
    + }
    +
    + ts = kzalloc(sizeof(*ts), GFP_KERNEL);
    + if (ts == NULL) {
    + ret = -ENOMEM;
    + goto err_alloc_data_failed;
    + }
    + INIT_WORK(&ts->work, synaptics_ts_work_func);
    + ts->client = client;
    + i2c_set_clientdata(client, ts);
    + pdata = client->dev.platform_data;
    + if (pdata)
    + ts->power = pdata->power;
    + else
    + pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
    +
    + if (ts->power) {
    + ret = ts->power(1);
    + if (ret < 0) {
    + printk(KERN_ERR "synaptics_ts_probe power on failed\n");
    + goto err_power_failed;
    + }
    + }
    +
    + ret = detect(ts, &panel_version);
    + if (ret)
    + goto err_detect_failed;
    +
    + while (pdata->version > panel_version)
    + pdata++;
    + ts->flags = pdata->flags;
    +
    + ret = i2c_read(ts, 0xf0, "device control");
    + if (ret < 0)
    + goto err_detect_failed;
    + pr_info("synaptics: device control %x\n", ret);
    +
    + ret = i2c_read(ts, 0xf1, "interrupt enable");
    + if (ret < 0)
    + goto err_detect_failed;
    + pr_info("synaptics_ts_probe: interrupt enable %x\n", ret);
    +
    + ret = i2c_set(ts, 0xf1, 0, "disable interrupt");
    + if (ret < 0)
    + goto err_detect_failed;
    +
    + msg[0].addr = ts->client->addr;
    + msg[0].flags = 0;
    + msg[0].len = 1;
    + msg[0].buf = buf0;
    + buf0[0] = 0xe0;
    + msg[1].addr = ts->client->addr;
    + msg[1].flags = I2C_M_RD;
    + msg[1].len = 8;
    + msg[1].buf = buf1;
    + ret = i2c_transfer(ts->client->adapter, msg, 2);
    + if (ret < 0) {
    + printk(KERN_ERR "i2c_transfer failed\n");
    + goto err_detect_failed;
    + }
    + printk(KERN_INFO "synaptics_ts_probe: 0xe0: %x %x %x %x %x %x %x %x\n",
    + buf1[0], buf1[1], buf1[2], buf1[3],
    + buf1[4], buf1[5], buf1[6], buf1[7]);
    +
    + ret = i2c_set(ts, 0xff, 0x10, "page select = 0x10");
    + if (ret < 0)
    + goto err_detect_failed;
    +
    + ret = i2c_smbus_read_word_data(ts->client, 0x04);
    + if (ret < 0) {
    + printk(KERN_ERR "i2c_smbus_read_word_data failed\n");
    + goto err_detect_failed;
    + }
    + ts->max[0] = max_x = (ret >> 8 & 0xff) | ((ret & 0x1f) << 8);
    + ret = i2c_smbus_read_word_data(ts->client, 0x06);
    + if (ret < 0) {
    + printk(KERN_ERR "i2c_smbus_read_word_data failed\n");
    + goto err_detect_failed;
    + }
    + ts->max[1] = max_y = (ret >> 8 & 0xff) | ((ret & 0x1f) << 8);
    + if (ts->flags & SYNAPTICS_SWAP_XY)
    + swap(max_x, max_y);
    +
    + /* will also switch back to page 0x04 */
    + ret = synaptics_init_panel(ts);
    + if (ret < 0) {
    + pr_err("synaptics_init_panel failed\n");
    + goto err_detect_failed;
    + }
    +
    + ts->input_dev = input_allocate_device();
    + if (ts->input_dev == NULL) {
    + ret = -ENOMEM;
    + pr_err("synaptics: Failed to allocate input device\n");
    + goto err_input_dev_alloc_failed;
    + }
    + ts->input_dev->name = "synaptics-rmi-touchscreen";
    + set_bit(EV_SYN, ts->input_dev->evbit);
    + set_bit(EV_KEY, ts->input_dev->evbit);
    + set_bit(BTN_TOUCH, ts->input_dev->keybit);
    + set_bit(BTN_2, ts->input_dev->keybit);
    + set_bit(EV_ABS, ts->input_dev->evbit);
    +
    + compute_areas(ts, pdata, max_x, max_y);
    +
    +
    + ret = input_register_device(ts->input_dev);
    + if (ret) {
    + pr_err("synaptics: Unable to register %s input device\n",
    + ts->input_dev->name);
    + goto err_input_register_device_failed;
    + }
    + if (client->irq) {
    + ret = request_irq(client->irq, synaptics_ts_irq_handler,
    + 0, client->name, ts);
    + if (ret == 0) {
    + ret = i2c_set(ts, 0xf1, 0x01, "enable abs int");
    + if (ret)
    + free_irq(client->irq, ts);
    + }
    + if (ret == 0)
    + ts->use_irq = 1;
    + else
    + dev_err(&client->dev, "request_irq failed\n");
    + }
    + if (!ts->use_irq) {
    + hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
    + ts->timer.function = synaptics_ts_timer_func;
    + hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
    + }
    +
    + pr_info("synaptics: Start touchscreen %s in %s mode\n",
    + ts->input_dev->name, ts->use_irq ? "interrupt" : "polling");
    +
    + return 0;
    +
    + err_input_register_device_failed:
    + input_free_device(ts->input_dev);
    +
    + err_input_dev_alloc_failed:
    + err_detect_failed:
    + err_power_failed:
    + kfree(ts);
    + err_alloc_data_failed:
    + err_check_functionality_failed:
    + return ret;
    +}
    +
    +static int synaptics_ts_remove(struct i2c_client *client)
    +{
    + struct synaptics_ts_data *ts = i2c_get_clientdata(client);
    +
    + if (ts->use_irq)
    + free_irq(client->irq, ts);
    + else
    + hrtimer_cancel(&ts->timer);
    + input_unregister_device(ts->input_dev);
    + kfree(ts);
    + return 0;
    +}
    +
    +static int synaptics_ts_suspend(struct i2c_client *client, pm_message_t mesg)
    +{
    + int ret;
    + struct synaptics_ts_data *ts = i2c_get_clientdata(client);
    +
    + if (ts->use_irq)
    + disable_irq(client->irq);
    + else
    + hrtimer_cancel(&ts->timer);
    + ret = cancel_work_sync(&ts->work);
    + if (ret && ts->use_irq) /* if work was pending disable-count is now 2 */
    + enable_irq(client->irq);
    + i2c_set(ts, 0xf1, 0, "disable interrupt");
    + i2c_set(ts, 0xf0, 0x86, "deep sleep");
    +
    + if (ts->power) {
    + ret = ts->power(0);
    + if (ret < 0)
    + pr_err("synaptics_ts_suspend power off failed\n");
    + }
    + return 0;
    +}
    +
    +static int synaptics_ts_resume(struct i2c_client *client)
    +{
    + int ret;
    + struct synaptics_ts_data *ts = i2c_get_clientdata(client);
    +
    + if (ts->power) {
    + ret = ts->power(1);
    + if (ret < 0)
    + pr_err("synaptics_ts_resume power on failed\n");
    + }
    +
    + synaptics_init_panel(ts);
    +
    + if (ts->use_irq) {
    + enable_irq(client->irq);
    + i2c_set(ts, 0xf1, 0x01, "enable abs int");
    + } else
    + hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
    +
    + return 0;
    +}
    +
    +
    +static const struct i2c_device_id synaptics_ts_id[] = {
    + { SYNAPTICS_I2C_RMI_NAME, 0 },
    + { }
    +};
    +
    +static struct i2c_driver synaptics_ts_driver = {
    + .probe = synaptics_ts_probe,
    + .remove = synaptics_ts_remove,
    + .suspend = synaptics_ts_suspend,
    + .resume = synaptics_ts_resume,
    + .id_table = synaptics_ts_id,
    + .driver = {
    + .name = SYNAPTICS_I2C_RMI_NAME,
    + },
    +};
    +
    +static int __devinit synaptics_ts_init(void)
    +{
    + synaptics_wq = create_singlethread_workqueue("synaptics_wq");
    + if (!synaptics_wq)
    + return -ENOMEM;
    + return i2c_add_driver(&synaptics_ts_driver);
    +}
    +
    +static void __exit synaptics_ts_exit(void)
    +{
    + i2c_del_driver(&synaptics_ts_driver);
    + if (synaptics_wq)
    + destroy_workqueue(synaptics_wq);
    +}
    +
    +module_init(synaptics_ts_init);
    +module_exit(synaptics_ts_exit);
    +
    +MODULE_DESCRIPTION("Synaptics Touchscreen Driver");
    +MODULE_LICENSE("GPL");
    diff --git a/include/linux/synaptics_i2c_rmi.h b/include/linux/synaptics_i2c_rmi.h
    new file mode 100644
    index 0000000..73e1de7
    --- /dev/null
    +++ b/include/linux/synaptics_i2c_rmi.h
    @@ -0,0 +1,53 @@
    +/*
    + * synaptics_i2c_rmi.h - platform data structure for f75375s sensor
    + *
    + * Copyright (C) 2008 Google, Inc.
    + *
    + * This software is licensed under the terms of the GNU General Public
    + * License version 2, as published by the Free Software Foundation, and
    + * may be copied, distributed, and modified under those terms.
    + *
    + * 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.
    + *
    + */
    +
    +#ifndef _LINUX_SYNAPTICS_I2C_RMI_H
    +#define _LINUX_SYNAPTICS_I2C_RMI_H
    +
    +#define SYNAPTICS_I2C_RMI_NAME "synaptics-rmi-ts"
    +
    +enum {
    + SYNAPTICS_FLIP_X = 1UL << 0,
    + SYNAPTICS_FLIP_Y = 1UL << 1,
    + SYNAPTICS_SWAP_XY = 1UL << 2,
    + SYNAPTICS_SNAP_TO_INACTIVE_EDGE = 1UL << 3,
    +};
    +
    +struct synaptics_i2c_rmi_platform_data {
    + u32 version; /* Use this entry for panels with */
    + /* (major << 8 | minor) version or above. */
    + /* If non-zero another array entry follows */
    + int (*power)(int on); /* Only valid in first array entry */
    + u32 flags;
    + u32 inactive_left; /* 0x10000 = screen width */
    + u32 inactive_right; /* 0x10000 = screen width */
    + u32 inactive_top; /* 0x10000 = screen height */
    + u32 inactive_bottom; /* 0x10000 = screen height */
    + u32 snap_left_on; /* 0x10000 = screen width */
    + u32 snap_left_off; /* 0x10000 = screen width */
    + u32 snap_right_on; /* 0x10000 = screen width */
    + u32 snap_right_off; /* 0x10000 = screen width */
    + u32 snap_top_on; /* 0x10000 = screen height */
    + u32 snap_top_off; /* 0x10000 = screen height */
    + u32 snap_bottom_on; /* 0x10000 = screen height */
    + u32 snap_bottom_off; /* 0x10000 = screen height */
    + u32 fuzz_x; /* 0x10000 = screen width */
    + u32 fuzz_y; /* 0x10000 = screen height */
    + int fuzz_p;
    + int fuzz_w;
    +};
    +
    +#endif /* _LINUX_SYNAPTICS_I2C_RMI_H */


    --
    (english) http://www.livejournal.com/~pavelmachek
    (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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