From 493a365e3619b58a315fd568546b8bd4acd09c98 Mon Sep 17 00:00:00 2001 From: Alison Wang Date: Thu, 11 Oct 2012 08:29:04 +0800 Subject: ENGR00181407-2: ts: add touch screen driver support for Vybird Add touch screen driver support for Vybird. Signed-off-by: Alison Wang --- drivers/input/touchscreen/Kconfig | 10 ++ drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/crtouch_ts.c | 277 +++++++++++++++++++++++++++++++++ 3 files changed, 288 insertions(+) create mode 100644 drivers/input/touchscreen/crtouch_ts.c (limited to 'drivers') diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index c698e138e86c..dcd283c11eaa 100755 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -767,4 +767,14 @@ config TOUCHSCREEN_MAX11801 To compile this driver as a module, choose M here: the module will be called max11801_ts + +config TOUCHSCREEN_CRTOUCH + tristate "Freescale CRTOUCH based touchscreen" + depends on I2C + help + Say Y here if you have a CRTOUCH based touchscreen + controller. + + To compile this driver as a module, choose M here: the + module will be called crtouch_ts. endif diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 63c23d061916..efed4c9c3adc 100755 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -65,3 +65,4 @@ obj-$(CONFIG_TOUCHSCREEN_P1003) += p1003_ts.o obj-$(CONFIG_TOUCHSCREEN_TPS6507X) += tps6507x-ts.o obj-$(CONFIG_TOUCHSCREEN_MAX11801) += max11801_ts.o obj-$(CONFIG_TOUCHSCREEN_EGALAX) += egalax_ts.o +obj-$(CONFIG_TOUCHSCREEN_CRTOUCH) += crtouch_ts.o diff --git a/drivers/input/touchscreen/crtouch_ts.c b/drivers/input/touchscreen/crtouch_ts.c new file mode 100644 index 000000000000..e5e23b8d5d78 --- /dev/null +++ b/drivers/input/touchscreen/crtouch_ts.c @@ -0,0 +1,277 @@ +/* + * Driver for Freescale Semiconductor CRTOUCH - A Resistive and Capacitive + * touch device with i2c interface + * + * Copyright 2012 Freescale Semiconductor, Inc. + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +/* Resistive touch sense status registers */ +#define RES_STA_ERROR 0x00 +#define RES_STA_STATUS1 0x01 +#define RES_STA_STATUS2 0x02 +#define RES_STA_X_MSB 0x03 +#define RES_STA_X_LSB 0x04 +#define RES_STA_Y_MSB 0x05 +#define RES_STA_Y_LSB 0x06 +#define RES_STA_PRES_MSB 0x07 +#define RES_STA_RRES_LSB 0x08 +#define RES_STA_FIFO_STATUS 0x09 +#define RES_STA_FIFO_X_MSB 0x0a +#define RES_STA_FIFO_X_LSB 0x0b +#define RES_STA_FIFO_Y_MSB 0x0c +#define RES_STA_FIFO_Y_LSB 0x0d +#define RES_STA_FIFO_PRES_MSB 0x0e +#define RES_STA_FIFO_PRES_LSB 0x0f +#define RES_STA_UART_BRATE_MSB 0x10 +#define RES_STA_UART_BRATE_MID 0x11 +#define RES_STA_UART_BRATE_LSB 0x12 +#define RES_STA_DEV_IDEN 0x13 +#define RES_STA_SLIDE_DISPLACE 0x14 +#define RES_STA_ROTATE_ANGLE 0x15 + +/* Resistive touch configuration registers */ +#define CR_CON_SYSTEM 0x40 +#define CR_CON_TRIG_EVENT 0x41 +#define CR_CON_FIFO_SETUP 0x42 +#define CR_CON_SAMPLING_RATE 0x43 +#define CR_CON_X_DELAY_MSB 0x44 +#define CR_CON_X_DELAY_LSB 0x45 +#define CR_CON_Y_DELAY_MSB 0x46 +#define CR_CON_Y_DELAY_LSB 0x47 +#define CR_CON_Z_DELAY_MSB 0x48 +#define CR_CON_Z_DELAY_LSB 0x49 +#define CR_CON_DIS_HOR_MSB 0x4a +#define CR_CON_DIS_HOR_LSB 0x4b +#define CR_CON_DIS_VER_MSB 0x4c +#define CR_CON_DIS_VER_LSB 0x4d +#define CR_CON_SLIDE_STEPS 0x4e + + +#define RTST_EVENT (1 << 7) +#define RTS2T_EVENT (1 << 6) +#define RTSZ_EVENT (1 << 5) +#define RTSR_EVENT (1 << 4) +#define RTSS_EVENT (1 << 3) +#define RTSF_EVENT (1 << 2) +#define RTSRDY_EVENT (1 << 0) + +#define RTSSD_MASK (1 << 2) +#define RTSSD_H_POS (0 << 2) +#define RTSSD_H_NEG (1 << 2) +#define RTSSD_V_POS (1 << 3) +#define RTSSD_V_NEG (1 << 4) + +#define RTSRD_MASK (1 << 4) +#define RTSRD_CLK_WISE (0 << 4) +#define RTSRD_COUNTER_CLK_WISE (1 << 4) + +#define RTSZD_MASK (1 << 5) +#define RTSZD_ZOOM_IN (0 << 5) +#define RTSZD_ZOOM_OUT (1 << 5) + +#define CRTOUCH_MAX_FINGER 2 +#define CRTOUCH_MAX_AREA 0xfff +#define CRTOUCH_MAX_X 0x01df +#define CRTOUCH_MAX_Y 0x010f + + +struct crtouch_ts_data { + struct i2c_client *client; + struct input_dev *input_dev; +}; + +static u8 crtouch_read_reg(struct i2c_client *client, int addr) +{ + return i2c_smbus_read_byte_data(client, addr); +} + +static int crtouch_write_reg(struct i2c_client *client, int addr, int data) +{ + return i2c_smbus_write_byte_data(client, addr, data); +} + +static void calibration_pointer(u16 *x_orig, u16 *y_orig) +{ + u16 x, y; + + x = CRTOUCH_MAX_X - *x_orig; + *x_orig = x; + + y = CRTOUCH_MAX_Y - *y_orig; + *y_orig = y; +} + +static irqreturn_t crtouch_ts_interrupt(int irq, void *dev_id) +{ + struct crtouch_ts_data *data = dev_id; + struct i2c_client *client = data->client; + u8 status1; + u16 valuep, valuex, valuey; + + status1 = crtouch_read_reg(client, RES_STA_STATUS1); + + /* For single touch */ + if (status1 & RTST_EVENT) { + valuep = crtouch_read_reg(client, RES_STA_PRES_MSB); + valuep = ((valuep << 8) | + crtouch_read_reg(client, RES_STA_RRES_LSB)); + valuex = crtouch_read_reg(client, RES_STA_X_MSB); + valuex = ((valuex << 8) | + crtouch_read_reg(client, RES_STA_X_LSB)); + valuey = crtouch_read_reg(client, RES_STA_Y_MSB); + valuey = ((valuey << 8) | + crtouch_read_reg(client, RES_STA_Y_LSB)); + calibration_pointer(&valuex, &valuey); + input_report_key(data->input_dev, BTN_TOUCH, 1); + input_report_abs(data->input_dev, ABS_X, valuex); + input_report_abs(data->input_dev, ABS_Y, valuey); + input_report_abs(data->input_dev, ABS_PRESSURE, valuep); + input_sync(data->input_dev); + } else { + input_report_abs(data->input_dev, ABS_PRESSURE, 0); + input_event(data->input_dev, EV_KEY, BTN_TOUCH, 0); + input_sync(data->input_dev); + } + + return IRQ_HANDLED; +} + +static void __devinit crtouch_ts_reg_init(struct crtouch_ts_data *data) +{ + struct i2c_client *client = data->client; + + crtouch_write_reg(client, CR_CON_SYSTEM, 0x9c); + crtouch_write_reg(client, CR_CON_TRIG_EVENT, 0xf9); + crtouch_write_reg(client, CR_CON_FIFO_SETUP, 0x1f); + crtouch_write_reg(client, CR_CON_SAMPLING_RATE, 0x08); + crtouch_write_reg(client, CR_CON_DIS_HOR_MSB, 0x01); + crtouch_write_reg(client, CR_CON_DIS_HOR_LSB, 0xdf); + crtouch_write_reg(client, CR_CON_DIS_VER_MSB, 0x01); + crtouch_write_reg(client, CR_CON_DIS_VER_LSB, 0x0f); +} + +static int __devinit crtouch_ts_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct crtouch_ts_data *data; + struct input_dev *input_dev; + int error; + + data = kzalloc(sizeof(struct crtouch_ts_data), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!data || !input_dev) { + dev_err(&client->dev, "Failed to allocate memory\n"); + error = -ENOMEM; + goto err_free_mem; + } + + data->client = client; + data->input_dev = input_dev; + + input_dev->name = "crtouch_ts"; + input_dev->id.bustype = BUS_I2C; + input_dev->dev.parent = &client->dev; + + /* For single touch */ + __set_bit(EV_KEY, input_dev->evbit); + __set_bit(BTN_TOUCH, input_dev->keybit); + __set_bit(EV_ABS, input_dev->evbit); + __set_bit(ABS_X, input_dev->absbit); + __set_bit(ABS_Y, input_dev->absbit); + __set_bit(ABS_PRESSURE, input_dev->absbit); + + input_set_abs_params(input_dev, ABS_X, 0, CRTOUCH_MAX_X, 0, 0); + input_set_abs_params(input_dev, ABS_Y, 0, CRTOUCH_MAX_Y, 0, 0); + input_set_abs_params(input_dev, ABS_PRESSURE, 0, + CRTOUCH_MAX_AREA, 0, 0); + + input_set_drvdata(input_dev, data); + + crtouch_ts_reg_init(data); + + error = gpio_request_one(21, GPIOF_IN, "TS_IRQ"); + if (error) { + dev_err(&client->dev, "Failed to request gpio\n"); + goto err_free_mem; + } + + error = request_threaded_irq(gpio_to_irq(21), NULL, + crtouch_ts_interrupt, IRQF_TRIGGER_FALLING, "crtouch_ts", data); + if (error) { + dev_err(&client->dev, "Failed to register interrupt\n"); + goto err_free_mem; + } + + error = input_register_device(data->input_dev); + if (error) + goto err_free_irq; + + 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 error; +} + +static __devexit int crtouch_ts_remove(struct i2c_client *client) +{ + struct crtouch_ts_data *data = i2c_get_clientdata(client); + + free_irq(client->irq, data); + input_unregister_device(data->input_dev); + kfree(data); + + return 0; +} + +static const struct i2c_device_id crtouch_ts_id[] = { + {"crtouch_ts", 0}, + { } +}; +MODULE_DEVICE_TABLE(i2c, crtouch_ts_id); + +static struct i2c_driver crtouch_ts_driver = { + .driver = { + .name = "crtouch_ts", + .owner = THIS_MODULE, + }, + .id_table = crtouch_ts_id, + .probe = crtouch_ts_probe, + .remove = __devexit_p(crtouch_ts_remove), +}; + +static int __init crtouch_ts_init(void) +{ + return i2c_add_driver(&crtouch_ts_driver); +} + +static void __exit crtouch_ts_exit(void) +{ + i2c_del_driver(&crtouch_ts_driver); +} + +module_init(crtouch_ts_init); +module_exit(crtouch_ts_exit); + +MODULE_AUTHOR("Alison Wang "); +MODULE_DESCRIPTION("Touchscreen driver for Freescale CRTOUCH"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3