diff options
Diffstat (limited to 'drivers/input/touchscreen/mcs5000_ts.c')
| -rw-r--r-- | drivers/input/touchscreen/mcs5000_ts.c | 318 |
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"); |