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SubjectHTC Dream: touchscreen driver for staging
From: Arve Hj?nnev?g <arve@android.com>

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

This is original version from Arve, fixed only to compile; I do have
cleaner version, but I broken something inside, and this will preserve
authorship better. I originally tried to push the driver directly to
input/touchscreen, but the driver has some issues with interrupt
handling that are more difficult to fix than I expected at first.

Signed-off-by: Arve Hj?nnev?g <arve@android.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>


diff --git a/drivers/staging/dream/Kconfig b/drivers/staging/dream/Kconfig
index 2e0c972..1fdbd48 100644
--- a/drivers/staging/dream/Kconfig
+++ b/drivers/staging/dream/Kconfig
@@ -2,3 +2,10 @@ source "drivers/staging/dream/smd/Kconfig"

source "drivers/staging/dream/camera/Kconfig"

+config TOUCHSCREEN_SYNAPTICS_I2C_RMI
+ tristate "Synaptics i2c touchscreen"
+ depends on I2C
+ help
+ This enables support for Synaptics RMI over I2C based touchscreens.
+
+
diff --git a/drivers/staging/dream/Makefile b/drivers/staging/dream/Makefile
index ab76800..286d66b 100644
--- a/drivers/staging/dream/Makefile
+++ b/drivers/staging/dream/Makefile
@@ -1,2 +1,5 @@
obj-$(CONFIG_MSM_ADSP) += qdsp5/ smd/
obj-$(CONFIG_MSM_CAMERA) += camera/
+
+obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI) += synaptics_i2c_rmi.o
+
diff --git a/drivers/staging/dream/synaptics_i2c_rmi.c b/drivers/staging/dream/synaptics_i2c_rmi.c
new file mode 100644
index 0000000..e916cea
--- /dev/null
+++ b/drivers/staging/dream/synaptics_i2c_rmi.c
@@ -0,0 +1,635 @@
+/* drivers/input/keyboard/synaptics_i2c_rmi.c
+ *
+ * Copyright (C) 2007 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.
+ *
+ */
+
+#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 "synaptics_i2c_rmi.h"
+
+#define swap(x, y) do { typeof(x) z = x; x = y; y = z; } while (0)
+
+static struct workqueue_struct *synaptics_wq;
+
+struct synaptics_ts_data {
+ uint16_t addr;
+ struct i2c_client *client;
+ struct input_dev *input_dev;
+ int use_irq;
+ struct hrtimer timer;
+ struct work_struct work;
+ uint16_t 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];
+ uint32_t flags;
+ int (*power)(int on);
+#ifdef CONFIG_HAS_EARLYSUSPEND
+ struct early_suspend early_suspend;
+#endif
+};
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+static void synaptics_ts_early_suspend(struct early_suspend *h);
+static void synaptics_ts_late_resume(struct early_suspend *h);
+#endif
+
+static int synaptics_init_panel(struct synaptics_ts_data *ts)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(ts->client, 0xff, 0x10); /* page select = 0x10 */
+ if (ret < 0) {
+ printk(KERN_ERR "i2c_smbus_write_byte_data failed for page select\n");
+ goto err_page_select_failed;
+ }
+ ret = i2c_smbus_write_byte_data(ts->client, 0x41, 0x04); /* Set "No Clip Z" */
+ if (ret < 0)
+ printk(KERN_ERR "i2c_smbus_write_byte_data failed for No Clip Z\n");
+
+err_page_select_failed:
+ ret = i2c_smbus_write_byte_data(ts->client, 0xff, 0x04); /* page select = 0x04 */
+ if (ret < 0)
+ printk(KERN_ERR "i2c_smbus_write_byte_data failed for page select\n");
+ ret = i2c_smbus_write_byte_data(ts->client, 0xf0, 0x81); /* normal operation, 80 reports per second */
+ if (ret < 0)
+ printk(KERN_ERR "synaptics_ts_resume: i2c_smbus_write_byte_data failed\n");
+ return ret;
+}
+
+static void synaptics_ts_work_func(struct work_struct *work)
+{
+ int i;
+ int ret;
+ int bad_data = 0;
+ struct i2c_msg msg[2];
+ uint8_t start_reg;
+ uint8_t 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;
+ start_reg = 0x00;
+ msg[1].addr = ts->client->addr;
+ msg[1].flags = I2C_M_RD;
+ msg[1].len = sizeof(buf);
+ msg[1].buf = buf;
+
+ /* printk("synaptics_ts_work_func\n"); */
+ 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 "synaptics_ts_work_func: i2c_transfer failed\n");
+ bad_data = 1;
+ } else {
+ /* printk("synaptics_ts_work_func: %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 ((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) {
+ /* printk("read %d coordinates\n", i); */
+ break;
+ } else {
+ int pos[2][2];
+ int f, a;
+ int base;
+ /* int x = buf[3] | (uint16_t)(buf[2] & 0x1f) << 8; */
+ /* int y = buf[5] | (uint16_t)(buf[4] & 0x1f) << 8; */
+ int z = buf[1];
+ int w = buf[0] >> 4;
+ int finger = buf[0] & 7;
+
+ /* int x2 = buf[3+6] | (uint16_t)(buf[2+6] & 0x1f) << 8; */
+ /* int y2 = buf[5+6] | (uint16_t)(buf[4+6] & 0x1f) << 8; */
+ /* int z2 = buf[1+6]; */
+ /* int w2 = buf[0+6] >> 4; */
+ /* int finger2 = buf[0+6] & 7; */
+
+ /* int dx = (int8_t)buf[12]; */
+ /* int dy = (int8_t)buf[13]; */
+ int finger2_pressed;
+
+ /* printk("x %4d, y %4d, z %3d, w %2d, F %d, 2nd: x %4d, y %4d, z %3d, w %2d, F %d, dx %4d, dy %4d\n", */
+ /* x, y, z, w, finger, */
+ /* x2, y2, z2, w2, finger2, */
+ /* dx, dy); */
+
+ base = 2;
+ for (f = 0; f < 2; f++) {
+ uint32_t flip_flag = SYNAPTICS_FLIP_X;
+ for (a = 0; a < 2; a++) {
+ int p = buf[base + 1];
+ p |= (uint16_t)(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);
+ }
+ }
+ }
+ 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);
+ /* printk("synaptics_ts_timer_func\n"); */
+
+ 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;
+
+ /* printk("synaptics_ts_irq_handler\n"); */
+ disable_irq(ts->client->irq);
+ queue_work(synaptics_wq, &ts->work);
+ return IRQ_HANDLED;
+}
+
+static int synaptics_ts_probe(
+ struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct synaptics_ts_data *ts;
+ uint8_t buf0[4];
+ uint8_t buf1[8];
+ struct i2c_msg msg[2];
+ int ret = 0;
+ uint16_t max_x, max_y;
+ int fuzz_x, fuzz_y, fuzz_p, fuzz_w;
+ struct synaptics_i2c_rmi_platform_data *pdata;
+ int inactive_area_left;
+ int inactive_area_right;
+ int inactive_area_top;
+ int inactive_area_bottom;
+ int snap_left_on;
+ int snap_left_off;
+ int snap_right_on;
+ int snap_right_off;
+ int snap_top_on;
+ int snap_top_off;
+ int snap_bottom_on;
+ int snap_bottom_off;
+ uint32_t panel_version;
+
+ 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;
+ 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 = i2c_smbus_write_byte_data(ts->client, 0xf4, 0x01); /* device command = reset */
+ if (ret < 0) {
+ printk(KERN_ERR "i2c_smbus_write_byte_data failed\n");
+ /* fail? */
+ }
+ {
+ int retry = 10;
+ while (retry-- > 0) {
+ ret = i2c_smbus_read_byte_data(ts->client, 0xe4);
+ if (ret >= 0)
+ break;
+ msleep(100);
+ }
+ }
+ if (ret < 0) {
+ printk(KERN_ERR "i2c_smbus_read_byte_data failed\n");
+ goto err_detect_failed;
+ }
+ printk(KERN_INFO "synaptics_ts_probe: Product Major Version %x\n", ret);
+ panel_version = ret << 8;
+ ret = i2c_smbus_read_byte_data(ts->client, 0xe5);
+ if (ret < 0) {
+ printk(KERN_ERR "i2c_smbus_read_byte_data failed\n");
+ goto err_detect_failed;
+ }
+ printk(KERN_INFO "synaptics_ts_probe: Product Minor Version %x\n", ret);
+ panel_version |= ret;
+
+ ret = i2c_smbus_read_byte_data(ts->client, 0xe3);
+ if (ret < 0) {
+ printk(KERN_ERR "i2c_smbus_read_byte_data failed\n");
+ goto err_detect_failed;
+ }
+ printk(KERN_INFO "synaptics_ts_probe: product property %x\n", ret);
+
+ if (pdata) {
+ while (pdata->version > panel_version)
+ pdata++;
+ ts->flags = pdata->flags;
+ 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;
+ } else {
+ inactive_area_left = 0;
+ inactive_area_right = 0;
+ inactive_area_top = 0;
+ inactive_area_bottom = 0;
+ snap_left_on = 0;
+ snap_left_off = 0;
+ snap_right_on = 0;
+ snap_right_off = 0;
+ snap_top_on = 0;
+ snap_top_off = 0;
+ snap_bottom_on = 0;
+ snap_bottom_off = 0;
+ fuzz_x = 0;
+ fuzz_y = 0;
+ fuzz_p = 0;
+ fuzz_w = 0;
+ }
+
+ ret = i2c_smbus_read_byte_data(ts->client, 0xf0);
+ if (ret < 0) {
+ printk(KERN_ERR "i2c_smbus_read_byte_data failed\n");
+ goto err_detect_failed;
+ }
+ printk(KERN_INFO "synaptics_ts_probe: device control %x\n", ret);
+
+ ret = i2c_smbus_read_byte_data(ts->client, 0xf1);
+ if (ret < 0) {
+ printk(KERN_ERR "i2c_smbus_read_byte_data failed\n");
+ goto err_detect_failed;
+ }
+ printk(KERN_INFO "synaptics_ts_probe: interrupt enable %x\n", ret);
+
+ ret = i2c_smbus_write_byte_data(ts->client, 0xf1, 0); /* disable interrupt */
+ if (ret < 0) {
+ printk(KERN_ERR "i2c_smbus_write_byte_data failed\n");
+ 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_smbus_write_byte_data(ts->client, 0xff, 0x10); /* page select = 0x10 */
+ if (ret < 0) {
+ printk(KERN_ERR "i2c_smbus_write_byte_data failed for page select\n");
+ 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);
+
+ ret = synaptics_init_panel(ts); /* will also switch back to page 0x04 */
+ if (ret < 0) {
+ printk(KERN_ERR "synaptics_init_panel failed\n");
+ goto err_detect_failed;
+ }
+
+ ts->input_dev = input_allocate_device();
+ if (ts->input_dev == NULL) {
+ ret = -ENOMEM;
+ printk(KERN_ERR "synaptics_ts_probe: 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);
+ 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[!!(ts->flags & SYNAPTICS_SWAP_XY)] = -inactive_area_left;
+ ts->snap_up[!!(ts->flags & SYNAPTICS_SWAP_XY)] = max_x + inactive_area_right;
+ ts->snap_down[!(ts->flags & SYNAPTICS_SWAP_XY)] = -inactive_area_top;
+ ts->snap_up[!(ts->flags & SYNAPTICS_SWAP_XY)] = max_y + inactive_area_bottom;
+ ts->snap_down_on[!!(ts->flags & SYNAPTICS_SWAP_XY)] = snap_left_on;
+ ts->snap_down_off[!!(ts->flags & SYNAPTICS_SWAP_XY)] = snap_left_off;
+ ts->snap_up_on[!!(ts->flags & SYNAPTICS_SWAP_XY)] = max_x - snap_right_on;
+ ts->snap_up_off[!!(ts->flags & SYNAPTICS_SWAP_XY)] = max_x - snap_right_off;
+ ts->snap_down_on[!(ts->flags & SYNAPTICS_SWAP_XY)] = snap_top_on;
+ ts->snap_down_off[!(ts->flags & SYNAPTICS_SWAP_XY)] = snap_top_off;
+ ts->snap_up_on[!(ts->flags & SYNAPTICS_SWAP_XY)] = max_y - snap_bottom_on;
+ ts->snap_up_off[!(ts->flags & SYNAPTICS_SWAP_XY)] = max_y - snap_bottom_off;
+ printk(KERN_INFO "synaptics_ts_probe: max_x %d, max_y %d\n", max_x, max_y);
+ printk(KERN_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);
+ printk(KERN_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);
+ /* ts->input_dev->name = ts->keypad_info->name; */
+ ret = input_register_device(ts->input_dev);
+ if (ret) {
+ printk(KERN_ERR "synaptics_ts_probe: 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_smbus_write_byte_data(ts->client, 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);
+ }
+#ifdef CONFIG_HAS_EARLYSUSPEND
+ ts->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
+ ts->early_suspend.suspend = synaptics_ts_early_suspend;
+ ts->early_suspend.resume = synaptics_ts_late_resume;
+ register_early_suspend(&ts->early_suspend);
+#endif
+
+ printk(KERN_INFO "synaptics_ts_probe: 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);
+#ifdef CONFIG_HAS_EARLYSUSPEND
+ unregister_early_suspend(&ts->early_suspend);
+#endif
+ 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);
+ ret = i2c_smbus_write_byte_data(ts->client, 0xf1, 0); /* disable interrupt */
+ if (ret < 0)
+ printk(KERN_ERR "synaptics_ts_suspend: i2c_smbus_write_byte_data failed\n");
+
+ ret = i2c_smbus_write_byte_data(client, 0xf0, 0x86); /* deep sleep */
+ if (ret < 0)
+ printk(KERN_ERR "synaptics_ts_suspend: i2c_smbus_write_byte_data failed\n");
+ if (ts->power) {
+ ret = ts->power(0);
+ if (ret < 0)
+ printk(KERN_ERR "synaptics_ts_resume 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)
+ printk(KERN_ERR "synaptics_ts_resume power on failed\n");
+ }
+
+ synaptics_init_panel(ts);
+
+ if (ts->use_irq)
+ enable_irq(client->irq);
+
+ if (!ts->use_irq)
+ hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
+ else
+ i2c_smbus_write_byte_data(ts->client, 0xf1, 0x01); /* enable abs int */
+
+ return 0;
+}
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+static void synaptics_ts_early_suspend(struct early_suspend *h)
+{
+ struct synaptics_ts_data *ts;
+ ts = container_of(h, struct synaptics_ts_data, early_suspend);
+ synaptics_ts_suspend(ts->client, PMSG_SUSPEND);
+}
+
+static void synaptics_ts_late_resume(struct early_suspend *h)
+{
+ struct synaptics_ts_data *ts;
+ ts = container_of(h, struct synaptics_ts_data, early_suspend);
+ synaptics_ts_resume(ts->client);
+}
+#endif
+
+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,
+#ifndef CONFIG_HAS_EARLYSUSPEND
+ .suspend = synaptics_ts_suspend,
+ .resume = synaptics_ts_resume,
+#endif
+ .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/drivers/staging/dream/synaptics_i2c_rmi.h b/drivers/staging/dream/synaptics_i2c_rmi.h
new file mode 100644
index 0000000..ca51b2f
--- /dev/null
+++ b/drivers/staging/dream/synaptics_i2c_rmi.h
@@ -0,0 +1,53 @@
+/*
+ * include/linux/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 {
+ uint32_t 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 */
+ uint32_t flags;
+ uint32_t inactive_left; /* 0x10000 = screen width */
+ uint32_t inactive_right; /* 0x10000 = screen width */
+ uint32_t inactive_top; /* 0x10000 = screen height */
+ uint32_t inactive_bottom; /* 0x10000 = screen height */
+ uint32_t snap_left_on; /* 0x10000 = screen width */
+ uint32_t snap_left_off; /* 0x10000 = screen width */
+ uint32_t snap_right_on; /* 0x10000 = screen width */
+ uint32_t snap_right_off; /* 0x10000 = screen width */
+ uint32_t snap_top_on; /* 0x10000 = screen height */
+ uint32_t snap_top_off; /* 0x10000 = screen height */
+ uint32_t snap_bottom_on; /* 0x10000 = screen height */
+ uint32_t snap_bottom_off; /* 0x10000 = screen height */
+ uint32_t fuzz_x; /* 0x10000 = screen width */
+ uint32_t 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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