Hi all,
This patch adds a driver for PIXCIR's I2C connected touchscreens.
Request the IRQ by doing request_threaded_irq() as v3.
Signed-off-by: Jianchun <jcbian@xxxxxxxxxxxxx>
---
drivers/input/touchscreen/Kconfig | 12 ++
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/pixcir_i2c_ts.c | 269
+++++++++++++++++++++++++++++
drivers/input/touchscreen/pixcir_i2c_ts.h | 13 ++
4 files changed, 295 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/touchscreen/pixcir_i2c_ts.c
create mode 100644 drivers/input/touchscreen/pixcir_i2c_ts.h
diff --git a/drivers/input/touchscreen/Kconfig
b/drivers/input/touchscreen/Kconfig
index 434fd80..e91f40f 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -714,4 +714,16 @@ config TOUCHSCREEN_TPS6507X
To compile this driver as a module, choose M here: the
module will be called tps6507x_ts.
+config TOUCHSCREEN_PIXCIR
+ tristate "PIXCIR I2C touchscreens"
+ depends on I2C
+ help
+ Say Y here if you have a pixcir i2c touchscreen
+ controller.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called pixcir_i2c_ts.
+
endif
diff --git a/drivers/input/touchscreen/Makefile
b/drivers/input/touchscreen/Makefile
index ca94098..585c0f0 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_TOUCHSCREEN_HTCPEN) += htcpen.o
obj-$(CONFIG_TOUCHSCREEN_USB_COMPOSITE) += usbtouchscreen.o
obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o
obj-$(CONFIG_TOUCHSCREEN_PENMOUNT) += penmount.o
+obj-$(CONFIG_TOUCHSCREEN_PIXCIR) += pixcir_i2c_ts.o
obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o
obj-$(CONFIG_TOUCHSCREEN_ST1232) += st1232.o
obj-$(CONFIG_TOUCHSCREEN_STMPE) += stmpe-ts.o
diff --git a/drivers/input/touchscreen/pixcir_i2c_ts.c
b/drivers/input/touchscreen/pixcir_i2c_ts.c
new file mode 100644
index 0000000..b734813
--- /dev/null
+++ b/drivers/input/touchscreen/pixcir_i2c_ts.c
@@ -0,0 +1,269 @@
+/* drivers/input/touchscreen/pixcir_i2c_ts.c
+ *
+ * Copyright (C) 2010-2011 Pixcir, Inc.
+ * V1.0
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
+ */
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/i2c.h>
+#include "pixcir_i2c_ts.h"
+
+struct pixcir_i2c_ts_data {
+ struct i2c_client *client;
+ struct input_dev *input;
+ wait_queue_head_t wait;
+ const struct pixcir_i2c_ts_platform *chip;
+ unsigned int attb_pin;
+ int irq;
+};
+
+static int pixcir_ts_poscheck(struct pixcir_i2c_ts_data *data)
+{
+ struct pixcir_i2c_ts_data *tsdata = data;
+
+ u8 touching, oldtouching;
+ u16 posx1, posy1, posx2, posy2;
+ u8 rdbuf[10], wrbuf[1];
+ int ret;
+
+ memset(wrbuf, 0, sizeof(wrbuf));
+ memset(rdbuf, 0, sizeof(rdbuf));
+
+ wrbuf[0] = 0;
+ ret = i2c_master_send(tsdata->client, wrbuf, 1);
+ if (ret != 1) {
+ dev_err(&tsdata->client->dev, "Unable to write to i2c touchscreen!\n");
+ goto out;
+ }
+
+ ret = i2c_master_recv(tsdata->client, rdbuf, sizeof(rdbuf));
+ if (ret != sizeof(rdbuf)) {
+ dev_err(&tsdata->client->dev, "Unable to read i2c page!\n");
+ goto out;
+ }
+
+ touching = rdbuf[0];
+ oldtouching = rdbuf[1];
+ posx1 = ((rdbuf[3] << 8) | rdbuf[2]);
+ posy1 = ((rdbuf[5] << 8) | rdbuf[4]);
+ posx2 = ((rdbuf[7] << 8) | rdbuf[6]);
+ posy2 = ((rdbuf[9] << 8) | rdbuf[8]);
+
+ input_report_key(tsdata->input, BTN_TOUCH, touching);
+
+ if (touching == 1) {
+ input_report_abs(tsdata->input, ABS_X, posx1);
+ input_report_abs(tsdata->input, ABS_Y, posy1);
+ }
+
+ if (touching == 2) {
+ input_report_abs(tsdata->input, ABS_MT_POSITION_X, posx1);
+ input_report_abs(tsdata->input, ABS_MT_POSITION_Y, posy1);
+ input_mt_sync(tsdata->input);
+
+ input_report_abs(tsdata->input, ABS_MT_POSITION_X, posx2);
+ input_report_abs(tsdata->input, ABS_MT_POSITION_Y, posy2);
+ input_mt_sync(tsdata->input);
+ } else
+ input_mt_sync(tsdata->input);
+ input_sync(tsdata->input);
+
+ return 0;
+
+out:
+ return -EINVAL;
+}
+
+static irqreturn_t pixcir_ts_isr(int irq, void *dev_id)
+{
+ struct pixcir_i2c_ts_data *tsdata = dev_id;
+
+ do {
+ pixcir_ts_poscheck(tsdata);
+ tsdata->attb_pin = tsdata->chip->attb_read_val();
+ if (tsdata->attb_pin == ATTB_PIN_LOW)
+ wait_event_timeout(tsdata->wait, TRUE,
+ msecs_to_jiffies(20));
+ } while (!tsdata->attb_pin);
+
+ return IRQ_HANDLED;
+}
+
+static void pixcir_ts_close(struct input_dev *dev)
+{
+
+}
+
+static int pixcir_i2c_ts_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct pixcir_i2c_ts_data *tsdata;
+ struct input_dev *input;
+ const struct pixcir_i2c_ts_platform *pdata =
+ client->dev.platform_data;
+ int error;
+
+ if (!pdata) {
+ dev_err(&client->dev, "platform data not defined\n");
+ return -EINVAL;
+ }
+
+ tsdata = kzalloc(sizeof(*tsdata), GFP_KERNEL);
+ if (!tsdata) {
+ dev_err(&client->dev, "Failed to allocate driver data!\n");
+ error = -ENOMEM;
+ dev_set_drvdata(&client->dev, NULL);
+ return error;
+ }
+
+ dev_set_drvdata(&client->dev, tsdata);
+
+ input = input_allocate_device();
+ if (!input) {
+ dev_err(&client->dev, "Failed to allocate input device!\n");
+ error = -ENOMEM;
+ input_free_device(input);
+ kfree(tsdata);
+ }
+
+ init_waitqueue_head(&tsdata->wait);
+
+ input->name = client->name;
+ input->id.bustype = BUS_I2C;
+ input->dev.parent = &client->dev;
+
+ input->close = pixcir_ts_close;
+
+ input_set_drvdata(input, tsdata);
+
+ tsdata->client = client;
+ tsdata->input = input;
+ tsdata->chip = pdata;
+ tsdata->irq = client->irq;
+
+ set_bit(EV_SYN, input->evbit);
+ set_bit(EV_KEY, input->evbit);
+ set_bit(EV_ABS, input->evbit);
+ set_bit(BTN_TOUCH, input->keybit);
+ input_set_abs_params(input, ABS_X, 0, pdata->ts_x_max, 0, 0);
+ input_set_abs_params(input, ABS_Y, 0, pdata->ts_y_max, 0, 0);
+ input_set_abs_params(input, ABS_MT_POSITION_X, 0, pdata->ts_x_max, 0, 0);
+ input_set_abs_params(input, ABS_MT_POSITION_Y, 0, pdata->ts_y_max, 0, 0);
+
+ if (input_register_device(input)) {
+ input_free_device(input);
+ kfree(tsdata);
+ }
+
+ if (request_threaded_irq(tsdata->irq, NULL, pixcir_ts_isr,
+ IRQF_TRIGGER_FALLING, client->name, tsdata)) {
+ dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
+ input_unregister_device(input);
+ input = NULL;
+ }
+
+ device_init_wakeup(&client->dev, 1);
+
+ return 0;
+}
+
+static int pixcir_i2c_ts_remove(struct i2c_client *client)
+{
+ struct pixcir_i2c_ts_data *tsdata;
+
+ tsdata = i2c_get_clientdata(client);
+ wake_up(&tsdata->wait);
+ free_irq(tsdata->irq, tsdata);
+ input_unregister_device(tsdata->input);
+ kfree(tsdata);
+ dev_set_drvdata(&client->dev, NULL);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int pixcir_i2c_ts_suspend(struct i2c_client *client,
pm_message_t mesg)
+{
+ struct pixcir_i2c_ts_data *tsdata = dev_get_drvdata(&client->dev);
+
+ if (device_may_wakeup(&client->dev))
+ enable_irq_wake(tsdata->irq);
+
+ return 0;
+}
+
+static int pixcir_i2c_ts_resume(struct i2c_client *client)
+{
+ struct pixcir_i2c_ts_data *tsdata = dev_get_drvdata(&client->dev);
+
+ if (device_may_wakeup(&client->dev))
+ disable_irq_wake(tsdata->irq);
+
+ return 0;
+}
+
+static const struct dev_pm_ops pixcir_dev_pm_ops = {
+ .suspend = pixcir_i2c_ts_suspend,
+ .resume = pixcir_i2c_ts_resume,
+};
+
+#else
+#define pixcir_i2c_ts_suspend NULL
+#define pixcir_i2c_ts_resume NULL
+#endif
+
+static const struct i2c_device_id pixcir_i2c_ts_id[] = {
+ { "pixcir_ts", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, pixcir_i2c_ts_id);
+
+static struct i2c_driver pixcir_i2c_ts_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "pixcir_ts",
+#ifdef PM_CONFIG
+ .pm = &pixcir_dev_pm_ops,
+#endif
+ },
+ .probe = pixcir_i2c_ts_probe,
+ .remove = pixcir_i2c_ts_remove,
+ .id_table = pixcir_i2c_ts_id,
+};
+
+static int __init pixcir_i2c_ts_init(void)
+{
+ /*pixcir_wq = create_singlethread_workqueue("pixcir_wq");
+ if (!pixcir_wq)
+ return -ENOMEM;*/
+ return i2c_add_driver(&pixcir_i2c_ts_driver);
+}
+
+static void __exit pixcir_i2c_ts_exit(void)
+{
+ i2c_del_driver(&pixcir_i2c_ts_driver);
+ /*if (pixcir_wq)
+ destroy_workqueue(pixcir_wq);*/
+}
+
+MODULE_AUTHOR("Jianchun Bian<jcbian@xxxxxxxxxxxxx>,Dequan
Meng<dqmeng@xxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Pixcir I2C Touchscreen Driver");
+MODULE_LICENSE("GPL");
+
+module_init(pixcir_i2c_ts_init);
+module_exit(pixcir_i2c_ts_exit);
diff --git a/drivers/input/touchscreen/pixcir_i2c_ts.h
b/drivers/input/touchscreen/pixcir_i2c_ts.h
new file mode 100644
index 0000000..b037c27
--- /dev/null
+++ b/drivers/input/touchscreen/pixcir_i2c_ts.h
@@ -0,0 +1,13 @@
+#ifndef _PIXCIR_I2C_TS_H
+#define _PIXCIR_I2C_TS_H
+
+#define TRUE 1
+#define ATTB_PIN_LOW 0
+
+struct pixcir_i2c_ts_platform {
+ int (*attb_read_val) (void);
+ int ts_x_max;
+ int ts_y_max;
+};
+
+#endif
--
1.7.0.4
--
Best Regards
Bee/Pixcir
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