This patch set introduces for Sitronix ST1232 touchscreen controller
driver. This is an integrated capacitive touchscreen with LCD module
which can detect two fingers's touch X/Y coordinate.
Signed-off-by: Tony SIM <chinyeow.sim.xt@xxxxxxxxxxx>
---
drivers/input/touchscreen/Kconfig | 11 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/st1232.c | 377 ++++++++++++++++++++++++++++++++++++
3 files changed, 389 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/touchscreen/st1232.c
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 06ea8da..3ca7700 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -681,4 +681,15 @@ config TOUCHSCREEN_STMPE
To compile this driver as a module, choose M here: the
module will be called stmpe-ts.
+config TOUCHSCREEN_ST1232
+ tristate "Sitronix ST1232 touchscreen controllers"
+ depends on I2C
+ help
+ Say Y here if you want to support Sitronix ST1232
+ touchscreen controller.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called st1232_ts.
endif
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 7cc1b4f..718bcc8 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o
obj-$(CONFIG_TOUCHSCREEN_PENMOUNT) += penmount.o
obj-$(CONFIG_TOUCHSCREEN_QT602240) += qt602240_ts.o
obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o
+obj-$(CONFIG_TOUCHSCREEN_ST1232) += st1232.o
obj-$(CONFIG_TOUCHSCREEN_STMPE) += stmpe-ts.o
obj-$(CONFIG_TOUCHSCREEN_TNETV107X) += tnetv107x-ts.o
obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o
diff --git a/drivers/input/touchscreen/st1232.c b/drivers/input/touchscreen/st1232.c
new file mode 100644
index 0000000..bfa24ee
--- /dev/null
+++ b/drivers/input/touchscreen/st1232.c
@@ -0,0 +1,377 @@
+/* drivers/input/touchscreen/st1232.c
+ *
+ * Copyright (C) 2010 Renesas Solutions Corp.
+ * Tony SIM <chinyeow.sim.xt@xxxxxxxxxxx>
+ *
+ * Using code from:
+ * - android.git.kernel.org: projects/kernel/common.git: 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/delay.h>
+#include <linux/earlysuspend.h>
+#include <linux/hrtimer.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#define ST1232_TS_NAME "st1232-ts"
+
+#define XY0 0
+#define XY1 1
+#define MAX_FINGERS 2
+
+#define MIN_X 0
+#define MIN_Y 0
+#define MAX_X 800
+#define MAX_Y 480
+#define MAX_AREA 0x7ff
+
+struct st1232_ts_data {
+ uint16_t addr;
+ struct i2c_client *client;
+ struct input_dev *input_dev;
+ int use_irq;
+ struct hrtimer timer;
+ struct work_struct work;
+ struct workqueue_struct *workq;
+ uint8_t pre_fingers_num;
+ uint8_t pre_is_valid[MAX_FINGERS];
+#ifdef CONFIG_HAS_EARLYSUSPEND
+ struct early_suspend early_suspend;
+#endif
+};
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+static void st1232_ts_early_suspend(struct early_suspend *h);
+static void st1232_ts_late_resume(struct early_suspend *h);
+#endif
+
+static void st1232_ts_work_func(struct work_struct *work)
+{
+ int ret;
+ struct i2c_msg msg[2];
+ uint8_t start_reg;
+ uint8_t buf[8];
+ struct st1232_ts_data *ts =
+ container_of(work, struct st1232_ts_data, work);
+ uint16_t x[MAX_FINGERS], y[MAX_FINGERS];
+ uint8_t fingers_num, is_valid[MAX_FINGERS];
+
+ /* read touchscreen data from ST1232 */
+ msg[0].addr = ts->client->addr;
+ msg[0].flags = 0;
+ msg[0].len = 1;
+ msg[0].buf = &start_reg;
+ start_reg = 0x10;
+
+ msg[1].addr = ts->client->addr;
+ msg[1].flags = I2C_M_RD;
+ msg[1].len = sizeof(buf);
+ msg[1].buf = buf;
+
+ ret = i2c_transfer(ts->client->adapter, msg, 2);
+ if (ret < 0)
+ goto done;
+
+ /* get valid bit */
+ is_valid[XY0] = buf[2] >> 7;
+ is_valid[XY1] = buf[5] >> 7;
+
+ /* get xy coordinate */
+ if (is_valid[XY0]) {
+ x[XY0] = ((buf[2] & 0x0070) << 4) | buf[3];
+ y[XY0] = ((buf[2] & 0x0007) << 8) | buf[4];
+ }
+
+ if (is_valid[XY1]) {
+ x[XY1] = ((buf[5] & 0x0070) << 4) | buf[6];
+ y[XY1] = ((buf[5] & 0x0007) << 8) | buf[7];
+ }
+
+ /* report single touch */
+ if (ts->pre_is_valid[XY0] || is_valid[XY0]) {
+ input_report_key(ts->input_dev, BTN_TOUCH, is_valid[XY0]);
+ if (is_valid[XY0]) {
+ input_report_abs(ts->input_dev, ABS_X, x[XY0]);
+ input_report_abs(ts->input_dev, ABS_Y, y[XY0]);
+ }
+ }
+
+ if (ts->pre_is_valid[XY1] || is_valid[XY1]) {
+ input_report_key(ts->input_dev, BTN_2, is_valid[XY1]);
+ if (is_valid[XY1]) {
+ input_report_abs(ts->input_dev, ABS_HAT0X, x[XY1]);
+ input_report_abs(ts->input_dev, ABS_HAT0Y, y[XY1]);
+ }
+ }
+
+ /* multi touch protocol */
+ fingers_num = is_valid[XY0] + is_valid[XY1];
+
+ if (fingers_num > 0) {
+ input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, MAX_AREA);
+ input_report_abs(ts->input_dev, ABS_MT_POSITION_X,
+ is_valid[XY0] ? x[XY0] : x[XY1]);
+ input_report_abs(ts->input_dev, ABS_MT_POSITION_Y,
+ is_valid[XY0] ? y[XY0] : y[XY1]);
+ input_mt_sync(ts->input_dev);
+
+ if (fingers_num == MAX_FINGERS) {
+ input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR,
+ MAX_AREA);
+ input_report_abs(ts->input_dev, ABS_MT_POSITION_X,
+ x[XY1]);
+ input_report_abs(ts->input_dev, ABS_MT_POSITION_Y,
+ y[XY1]);
+ input_mt_sync(ts->input_dev);
+ }
+ } else if ((ts->pre_fingers_num == 1) && (fingers_num == 0)) {
+ input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0);
+ input_mt_sync(ts->input_dev);
+ }
+
+ /* EV_SYN */
+ input_sync(ts->input_dev);
+
+ ts->pre_fingers_num = fingers_num;
+ ts->pre_is_valid[XY0] = is_valid[XY0];
+ ts->pre_is_valid[XY1] = is_valid[XY1];
+
+done:
+ if (ts->use_irq)
+ enable_irq(ts->client->irq);
+
+ return;
+}
+
+static enum hrtimer_restart st1232_ts_timer_func(struct hrtimer *timer)
+{
+ struct st1232_ts_data *ts =
+ container_of(timer, struct st1232_ts_data, timer);
+
+ pr_debug("st1232_ts_timer_func\n");
+ queue_work(ts->workq, &ts->work);
+ hrtimer_start(&ts->timer, ktime_set(0, 12500000), HRTIMER_MODE_REL);
+ return HRTIMER_NORESTART;
+}
+
+static irqreturn_t st1232_ts_irq_handler(int irq, void *dev_id)
+{
+ struct st1232_ts_data *ts = dev_id;
+
+ pr_debug("st1232_ts_irq_handler\n");
+ disable_irq_nosync(ts->client->irq);
+ queue_work(ts->workq, &ts->work);
+ return IRQ_HANDLED;
+}
+
+static int st1232_ts_probe(
+ struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct st1232_ts_data *ts;
+ int ret;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev, "need I2C_FUNC_I2C\n");
+ return -EIO;
+ }
+
+ ts = kzalloc(sizeof(struct st1232_ts_data), GFP_KERNEL);
+ if (!ts) {
+ ret = -ENOMEM;
+ goto err_alloc_data_failed;
+ }
+ INIT_WORK(&ts->work, st1232_ts_work_func);
+ ts->client = client;
+ i2c_set_clientdata(client, ts);
+
+ ts->input_dev = input_allocate_device();
+ if (!ts->input_dev) {
+ ret = -ENOMEM;
+ dev_err(&client->dev, "Failed to allocate input device\n");
+ goto err_input_dev_alloc_failed;
+ }
+ ts->input_dev->name = "st1232-touchscreen";
+
+ ts->workq = create_singlethread_workqueue("st1232_workq");
+ if (!ts->workq)
+ return -ENOMEM;
+
+ 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);
+
+ input_set_capability(ts->input_dev, EV_KEY, BTN_TOUCH);
+ input_set_capability(ts->input_dev, EV_KEY, BTN_2);
+
+ input_set_abs_params(ts->input_dev, ABS_X, MIN_X, MAX_X, 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_Y, MIN_Y, MAX_Y, 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_HAT0X, MIN_X, MAX_X, 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_HAT0Y, MIN_Y, MAX_Y, 0, 0);
+
+ input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X,
+ MIN_X, MAX_X, 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y,
+ MIN_Y, MAX_Y, 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR,
+ 0, MAX_AREA, 0, 0);
+
+ ret = input_register_device(ts->input_dev);
+ if (ret) {
+ dev_err(&client->dev, "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, st1232_ts_irq_handler, 0,
+ client->name, ts);
+ if (ret)
+ dev_err(&client->dev, "request_irq failed\n");
+ else
+ ts->use_irq = 1;
+ }
+
+ if (!ts->use_irq) {
+ hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ ts->timer.function = st1232_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 = st1232_ts_early_suspend;
+ ts->early_suspend.resume = st1232_ts_late_resume;
+ register_early_suspend(&ts->early_suspend);
+#endif
+
+ dev_info(&client->dev, "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:
+ kfree(ts);
+err_alloc_data_failed:
+ return ret;
+}
+
+static int st1232_ts_remove(struct i2c_client *client)
+{
+ struct st1232_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);
+
+ if (ts->workq)
+ destroy_workqueue(ts->workq);
+
+ input_unregister_device(ts->input_dev);
+
+ kfree(ts);
+ return 0;
+}
+
+static int st1232_ts_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+ int ret;
+ struct st1232_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)
+ enable_irq(client->irq);
+
+ return 0;
+}
+
+static int st1232_ts_resume(struct i2c_client *client)
+{
+ struct st1232_ts_data *ts = i2c_get_clientdata(client);
+
+ if (ts->use_irq)
+ enable_irq(client->irq);
+ else
+ hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
+
+ return 0;
+}
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+static void st1232_ts_early_suspend(struct early_suspend *h)
+{
+ struct st1232_ts_data *ts;
+ ts = container_of(h, struct st1232_ts_data, early_suspend);
+ st1232_ts_suspend(ts->client, PMSG_SUSPEND);
+}
+
+static void st1232_ts_late_resume(struct early_suspend *h)
+{
+ struct st1232_ts_data *ts;
+ ts = container_of(h, struct st1232_ts_data, early_suspend);
+ st1232_ts_resume(ts->client);
+}
+#endif
+
+static const struct i2c_device_id st1232_ts_id[] = {
+ { ST1232_TS_NAME, 0 },
+ { }
+};
+
+static struct i2c_driver st1232_ts_driver = {
+ .probe = st1232_ts_probe,
+ .remove = st1232_ts_remove,
+#ifndef CONFIG_HAS_EARLYSUSPEND
+ .suspend = st1232_ts_suspend,
+ .resume = st1232_ts_resume,
+#endif
+ .id_table = st1232_ts_id,
+ .driver = {
+ .name = ST1232_TS_NAME,
+ },
+};
+
+static int __devinit st1232_ts_init(void)
+{
+ return i2c_add_driver(&st1232_ts_driver);
+}
+
+static void __exit st1232_ts_exit(void)
+{
+ i2c_del_driver(&st1232_ts_driver);
+}
+
+module_init(st1232_ts_init);
+module_exit(st1232_ts_exit);
+
+MODULE_AUTHOR("Tony SIM <chinyeow.sim.xt@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("SITRONIX ST1232 Touchscreen Controller Driver");
+MODULE_LICENSE("GPL");
--
1.7.2.3
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