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authorJoonyoung Shim <jy0922.shim@samsung.com>2009-09-17 22:35:45 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2009-09-17 23:24:03 -0700
commit38e783b38148531c0840ac130b97eb8158f84b48 (patch)
tree05a037b42cd196fb7d86603630f8fc6cbc01e008 /drivers/input/touchscreen/mcs5000_ts.c
parent422b552debae59b4bebc0ea5fbb9c809d3dfd057 (diff)
downloadlinux-38e783b38148531c0840ac130b97eb8158f84b48.tar.gz
Input: add touchscreen driver for MELFAS MCS-5000 controller
The MELPAS MCS-5000 is the touchscreen controller. The overview of this controller can see at the following website: http://www.melfas.com/product/product01.asp?k_r=eng_ This driver is tested on s3c6410 NCP board and supports only the i2c interface. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/touchscreen/mcs5000_ts.c')
-rw-r--r--drivers/input/touchscreen/mcs5000_ts.c318
1 files changed, 318 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/mcs5000_ts.c b/drivers/input/touchscreen/mcs5000_ts.c
new file mode 100644
index 000000000000..4c28b89757f9
--- /dev/null
+++ b/drivers/input/touchscreen/mcs5000_ts.c
@@ -0,0 +1,318 @@
+/*
+ * mcs5000_ts.c - Touchscreen driver for MELFAS MCS-5000 controller
+ *
+ * Copyright (C) 2009 Samsung Electronics Co.Ltd
+ * Author: Joonyoung Shim <jy0922.shim@samsung.com>
+ *
+ * Based on wm97xx-core.c
+ *
+ * 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/i2c/mcs5000_ts.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/irq.h>
+
+/* Registers */
+#define MCS5000_TS_STATUS 0x00
+#define STATUS_OFFSET 0
+#define STATUS_NO (0 << STATUS_OFFSET)
+#define STATUS_INIT (1 << STATUS_OFFSET)
+#define STATUS_SENSING (2 << STATUS_OFFSET)
+#define STATUS_COORD (3 << STATUS_OFFSET)
+#define STATUS_GESTURE (4 << STATUS_OFFSET)
+#define ERROR_OFFSET 4
+#define ERROR_NO (0 << ERROR_OFFSET)
+#define ERROR_POWER_ON_RESET (1 << ERROR_OFFSET)
+#define ERROR_INT_RESET (2 << ERROR_OFFSET)
+#define ERROR_EXT_RESET (3 << ERROR_OFFSET)
+#define ERROR_INVALID_REG_ADDRESS (8 << ERROR_OFFSET)
+#define ERROR_INVALID_REG_VALUE (9 << ERROR_OFFSET)
+
+#define MCS5000_TS_OP_MODE 0x01
+#define RESET_OFFSET 0
+#define RESET_NO (0 << RESET_OFFSET)
+#define RESET_EXT_SOFT (1 << RESET_OFFSET)
+#define OP_MODE_OFFSET 1
+#define OP_MODE_SLEEP (0 << OP_MODE_OFFSET)
+#define OP_MODE_ACTIVE (1 << OP_MODE_OFFSET)
+#define GESTURE_OFFSET 4
+#define GESTURE_DISABLE (0 << GESTURE_OFFSET)
+#define GESTURE_ENABLE (1 << GESTURE_OFFSET)
+#define PROXIMITY_OFFSET 5
+#define PROXIMITY_DISABLE (0 << PROXIMITY_OFFSET)
+#define PROXIMITY_ENABLE (1 << PROXIMITY_OFFSET)
+#define SCAN_MODE_OFFSET 6
+#define SCAN_MODE_INTERRUPT (0 << SCAN_MODE_OFFSET)
+#define SCAN_MODE_POLLING (1 << SCAN_MODE_OFFSET)
+#define REPORT_RATE_OFFSET 7
+#define REPORT_RATE_40 (0 << REPORT_RATE_OFFSET)
+#define REPORT_RATE_80 (1 << REPORT_RATE_OFFSET)
+
+#define MCS5000_TS_SENS_CTL 0x02
+#define MCS5000_TS_FILTER_CTL 0x03
+#define PRI_FILTER_OFFSET 0
+#define SEC_FILTER_OFFSET 4
+
+#define MCS5000_TS_X_SIZE_UPPER 0x08
+#define MCS5000_TS_X_SIZE_LOWER 0x09
+#define MCS5000_TS_Y_SIZE_UPPER 0x0A
+#define MCS5000_TS_Y_SIZE_LOWER 0x0B
+
+#define MCS5000_TS_INPUT_INFO 0x10
+#define INPUT_TYPE_OFFSET 0
+#define INPUT_TYPE_NONTOUCH (0 << INPUT_TYPE_OFFSET)
+#define INPUT_TYPE_SINGLE (1 << INPUT_TYPE_OFFSET)
+#define INPUT_TYPE_DUAL (2 << INPUT_TYPE_OFFSET)
+#define INPUT_TYPE_PALM (3 << INPUT_TYPE_OFFSET)
+#define INPUT_TYPE_PROXIMITY (7 << INPUT_TYPE_OFFSET)
+#define GESTURE_CODE_OFFSET 3
+#define GESTURE_CODE_NO (0 << GESTURE_CODE_OFFSET)
+
+#define MCS5000_TS_X_POS_UPPER 0x11
+#define MCS5000_TS_X_POS_LOWER 0x12
+#define MCS5000_TS_Y_POS_UPPER 0x13
+#define MCS5000_TS_Y_POS_LOWER 0x14
+#define MCS5000_TS_Z_POS 0x15
+#define MCS5000_TS_WIDTH 0x16
+#define MCS5000_TS_GESTURE_VAL 0x17
+#define MCS5000_TS_MODULE_REV 0x20
+#define MCS5000_TS_FIRMWARE_VER 0x21
+
+/* Touchscreen absolute values */
+#define MCS5000_MAX_XC 0x3ff
+#define MCS5000_MAX_YC 0x3ff
+
+enum mcs5000_ts_read_offset {
+ READ_INPUT_INFO,
+ READ_X_POS_UPPER,
+ READ_X_POS_LOWER,
+ READ_Y_POS_UPPER,
+ READ_Y_POS_LOWER,
+ READ_BLOCK_SIZE,
+};
+
+/* Each client has this additional data */
+struct mcs5000_ts_data {
+ struct i2c_client *client;
+ struct input_dev *input_dev;
+ const struct mcs5000_ts_platform_data *platform_data;
+};
+
+static irqreturn_t mcs5000_ts_interrupt(int irq, void *dev_id)
+{
+ struct mcs5000_ts_data *data = dev_id;
+ struct i2c_client *client = data->client;
+ u8 buffer[READ_BLOCK_SIZE];
+ int err;
+ int x;
+ int y;
+
+ err = i2c_smbus_read_i2c_block_data(client, MCS5000_TS_INPUT_INFO,
+ READ_BLOCK_SIZE, buffer);
+ if (err < 0) {
+ dev_err(&client->dev, "%s, err[%d]\n", __func__, err);
+ goto out;
+ }
+
+ switch (buffer[READ_INPUT_INFO]) {
+ case INPUT_TYPE_NONTOUCH:
+ input_report_key(data->input_dev, BTN_TOUCH, 0);
+ input_sync(data->input_dev);
+ break;
+
+ case INPUT_TYPE_SINGLE:
+ x = (buffer[READ_X_POS_UPPER] << 8) | buffer[READ_X_POS_LOWER];
+ y = (buffer[READ_Y_POS_UPPER] << 8) | buffer[READ_Y_POS_LOWER];
+
+ input_report_key(data->input_dev, BTN_TOUCH, 1);
+ input_report_abs(data->input_dev, ABS_X, x);
+ input_report_abs(data->input_dev, ABS_Y, y);
+ input_sync(data->input_dev);
+ break;
+
+ case INPUT_TYPE_DUAL:
+ /* TODO */
+ break;
+
+ case INPUT_TYPE_PALM:
+ /* TODO */
+ break;
+
+ case INPUT_TYPE_PROXIMITY:
+ /* TODO */
+ break;
+
+ default:
+ dev_err(&client->dev, "Unknown ts input type %d\n",
+ buffer[READ_INPUT_INFO]);
+ break;
+ }
+
+ out:
+ return IRQ_HANDLED;
+}
+
+static void mcs5000_ts_phys_init(struct mcs5000_ts_data *data)
+{
+ const struct mcs5000_ts_platform_data *platform_data =
+ data->platform_data;
+ struct i2c_client *client = data->client;
+
+ /* Touch reset & sleep mode */
+ i2c_smbus_write_byte_data(client, MCS5000_TS_OP_MODE,
+ RESET_EXT_SOFT | OP_MODE_SLEEP);
+
+ /* Touch size */
+ i2c_smbus_write_byte_data(client, MCS5000_TS_X_SIZE_UPPER,
+ platform_data->x_size >> 8);
+ i2c_smbus_write_byte_data(client, MCS5000_TS_X_SIZE_LOWER,
+ platform_data->x_size & 0xff);
+ i2c_smbus_write_byte_data(client, MCS5000_TS_Y_SIZE_UPPER,
+ platform_data->y_size >> 8);
+ i2c_smbus_write_byte_data(client, MCS5000_TS_Y_SIZE_LOWER,
+ platform_data->y_size & 0xff);
+
+ /* Touch active mode & 80 report rate */
+ i2c_smbus_write_byte_data(data->client, MCS5000_TS_OP_MODE,
+ OP_MODE_ACTIVE | REPORT_RATE_80);
+}
+
+static int __devinit mcs5000_ts_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct mcs5000_ts_data *data;
+ struct input_dev *input_dev;
+ int ret;
+
+ if (!client->dev.platform_data)
+ return -EINVAL;
+
+ data = kzalloc(sizeof(struct mcs5000_ts_data), GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!data || !input_dev) {
+ dev_err(&client->dev, "Failed to allocate memory\n");
+ ret = -ENOMEM;
+ goto err_free_mem;
+ }
+
+ data->client = client;
+ data->input_dev = input_dev;
+ data->platform_data = client->dev.platform_data;
+
+ input_dev->name = "MELPAS MCS-5000 Touchscreen";
+ input_dev->id.bustype = BUS_I2C;
+ input_dev->dev.parent = &client->dev;
+
+ __set_bit(EV_ABS, input_dev->evbit);
+ __set_bit(EV_KEY, input_dev->evbit);
+ __set_bit(BTN_TOUCH, input_dev->keybit);
+ input_set_abs_params(input_dev, ABS_X, 0, MCS5000_MAX_XC, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y, 0, MCS5000_MAX_YC, 0, 0);
+
+ input_set_drvdata(input_dev, data);
+
+ if (data->platform_data->cfg_pin)
+ data->platform_data->cfg_pin();
+
+ ret = request_threaded_irq(client->irq, NULL, mcs5000_ts_interrupt,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT, "mcs5000_ts", data);
+
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to register interrupt\n");
+ goto err_free_mem;
+ }
+
+ ret = input_register_device(data->input_dev);
+ if (ret < 0)
+ goto err_free_irq;
+
+ mcs5000_ts_phys_init(data);
+ i2c_set_clientdata(client, data);
+
+ return 0;
+
+err_free_irq:
+ free_irq(client->irq, data);
+err_free_mem:
+ input_free_device(input_dev);
+ kfree(data);
+ return ret;
+}
+
+static int __devexit mcs5000_ts_remove(struct i2c_client *client)
+{
+ struct mcs5000_ts_data *data = i2c_get_clientdata(client);
+
+ free_irq(client->irq, data);
+ input_unregister_device(data->input_dev);
+ kfree(data);
+ i2c_set_clientdata(client, NULL);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int mcs5000_ts_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+ /* Touch sleep mode */
+ i2c_smbus_write_byte_data(client, MCS5000_TS_OP_MODE, OP_MODE_SLEEP);
+
+ return 0;
+}
+
+static int mcs5000_ts_resume(struct i2c_client *client)
+{
+ struct mcs5000_ts_data *data = i2c_get_clientdata(client);
+
+ mcs5000_ts_phys_init(data);
+
+ return 0;
+}
+#else
+#define mcs5000_ts_suspend NULL
+#define mcs5000_ts_resume NULL
+#endif
+
+static const struct i2c_device_id mcs5000_ts_id[] = {
+ { "mcs5000_ts", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, mcs5000_ts_id);
+
+static struct i2c_driver mcs5000_ts_driver = {
+ .probe = mcs5000_ts_probe,
+ .remove = __devexit_p(mcs5000_ts_remove),
+ .suspend = mcs5000_ts_suspend,
+ .resume = mcs5000_ts_resume,
+ .driver = {
+ .name = "mcs5000_ts",
+ },
+ .id_table = mcs5000_ts_id,
+};
+
+static int __init mcs5000_ts_init(void)
+{
+ return i2c_add_driver(&mcs5000_ts_driver);
+}
+
+static void __exit mcs5000_ts_exit(void)
+{
+ i2c_del_driver(&mcs5000_ts_driver);
+}
+
+module_init(mcs5000_ts_init);
+module_exit(mcs5000_ts_exit);
+
+/* Module information */
+MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
+MODULE_DESCRIPTION("Touchscreen driver for MELFAS MCS-5000 controller");
+MODULE_LICENSE("GPL");