138e783b3SJoonyoung Shim /* 238e783b3SJoonyoung Shim * mcs5000_ts.c - Touchscreen driver for MELFAS MCS-5000 controller 338e783b3SJoonyoung Shim * 438e783b3SJoonyoung Shim * Copyright (C) 2009 Samsung Electronics Co.Ltd 538e783b3SJoonyoung Shim * Author: Joonyoung Shim <jy0922.shim@samsung.com> 638e783b3SJoonyoung Shim * 738e783b3SJoonyoung Shim * Based on wm97xx-core.c 838e783b3SJoonyoung Shim * 938e783b3SJoonyoung Shim * This program is free software; you can redistribute it and/or modify it 1038e783b3SJoonyoung Shim * under the terms of the GNU General Public License as published by the 1138e783b3SJoonyoung Shim * Free Software Foundation; either version 2 of the License, or (at your 1238e783b3SJoonyoung Shim * option) any later version. 1338e783b3SJoonyoung Shim * 1438e783b3SJoonyoung Shim */ 1538e783b3SJoonyoung Shim 1638e783b3SJoonyoung Shim #include <linux/module.h> 1738e783b3SJoonyoung Shim #include <linux/i2c.h> 18312e8e8aSJoonyoung Shim #include <linux/i2c/mcs.h> 1938e783b3SJoonyoung Shim #include <linux/interrupt.h> 2038e783b3SJoonyoung Shim #include <linux/input.h> 2138e783b3SJoonyoung Shim #include <linux/irq.h> 225a0e3ad6STejun Heo #include <linux/slab.h> 2338e783b3SJoonyoung Shim 2438e783b3SJoonyoung Shim /* Registers */ 2538e783b3SJoonyoung Shim #define MCS5000_TS_STATUS 0x00 2638e783b3SJoonyoung Shim #define STATUS_OFFSET 0 2738e783b3SJoonyoung Shim #define STATUS_NO (0 << STATUS_OFFSET) 2838e783b3SJoonyoung Shim #define STATUS_INIT (1 << STATUS_OFFSET) 2938e783b3SJoonyoung Shim #define STATUS_SENSING (2 << STATUS_OFFSET) 3038e783b3SJoonyoung Shim #define STATUS_COORD (3 << STATUS_OFFSET) 3138e783b3SJoonyoung Shim #define STATUS_GESTURE (4 << STATUS_OFFSET) 3238e783b3SJoonyoung Shim #define ERROR_OFFSET 4 3338e783b3SJoonyoung Shim #define ERROR_NO (0 << ERROR_OFFSET) 3438e783b3SJoonyoung Shim #define ERROR_POWER_ON_RESET (1 << ERROR_OFFSET) 3538e783b3SJoonyoung Shim #define ERROR_INT_RESET (2 << ERROR_OFFSET) 3638e783b3SJoonyoung Shim #define ERROR_EXT_RESET (3 << ERROR_OFFSET) 3738e783b3SJoonyoung Shim #define ERROR_INVALID_REG_ADDRESS (8 << ERROR_OFFSET) 3838e783b3SJoonyoung Shim #define ERROR_INVALID_REG_VALUE (9 << ERROR_OFFSET) 3938e783b3SJoonyoung Shim 4038e783b3SJoonyoung Shim #define MCS5000_TS_OP_MODE 0x01 4138e783b3SJoonyoung Shim #define RESET_OFFSET 0 4238e783b3SJoonyoung Shim #define RESET_NO (0 << RESET_OFFSET) 4338e783b3SJoonyoung Shim #define RESET_EXT_SOFT (1 << RESET_OFFSET) 4438e783b3SJoonyoung Shim #define OP_MODE_OFFSET 1 4538e783b3SJoonyoung Shim #define OP_MODE_SLEEP (0 << OP_MODE_OFFSET) 4638e783b3SJoonyoung Shim #define OP_MODE_ACTIVE (1 << OP_MODE_OFFSET) 4738e783b3SJoonyoung Shim #define GESTURE_OFFSET 4 4838e783b3SJoonyoung Shim #define GESTURE_DISABLE (0 << GESTURE_OFFSET) 4938e783b3SJoonyoung Shim #define GESTURE_ENABLE (1 << GESTURE_OFFSET) 5038e783b3SJoonyoung Shim #define PROXIMITY_OFFSET 5 5138e783b3SJoonyoung Shim #define PROXIMITY_DISABLE (0 << PROXIMITY_OFFSET) 5238e783b3SJoonyoung Shim #define PROXIMITY_ENABLE (1 << PROXIMITY_OFFSET) 5338e783b3SJoonyoung Shim #define SCAN_MODE_OFFSET 6 5438e783b3SJoonyoung Shim #define SCAN_MODE_INTERRUPT (0 << SCAN_MODE_OFFSET) 5538e783b3SJoonyoung Shim #define SCAN_MODE_POLLING (1 << SCAN_MODE_OFFSET) 5638e783b3SJoonyoung Shim #define REPORT_RATE_OFFSET 7 5738e783b3SJoonyoung Shim #define REPORT_RATE_40 (0 << REPORT_RATE_OFFSET) 5838e783b3SJoonyoung Shim #define REPORT_RATE_80 (1 << REPORT_RATE_OFFSET) 5938e783b3SJoonyoung Shim 6038e783b3SJoonyoung Shim #define MCS5000_TS_SENS_CTL 0x02 6138e783b3SJoonyoung Shim #define MCS5000_TS_FILTER_CTL 0x03 6238e783b3SJoonyoung Shim #define PRI_FILTER_OFFSET 0 6338e783b3SJoonyoung Shim #define SEC_FILTER_OFFSET 4 6438e783b3SJoonyoung Shim 6538e783b3SJoonyoung Shim #define MCS5000_TS_X_SIZE_UPPER 0x08 6638e783b3SJoonyoung Shim #define MCS5000_TS_X_SIZE_LOWER 0x09 6738e783b3SJoonyoung Shim #define MCS5000_TS_Y_SIZE_UPPER 0x0A 6838e783b3SJoonyoung Shim #define MCS5000_TS_Y_SIZE_LOWER 0x0B 6938e783b3SJoonyoung Shim 7038e783b3SJoonyoung Shim #define MCS5000_TS_INPUT_INFO 0x10 7138e783b3SJoonyoung Shim #define INPUT_TYPE_OFFSET 0 7238e783b3SJoonyoung Shim #define INPUT_TYPE_NONTOUCH (0 << INPUT_TYPE_OFFSET) 7338e783b3SJoonyoung Shim #define INPUT_TYPE_SINGLE (1 << INPUT_TYPE_OFFSET) 7438e783b3SJoonyoung Shim #define INPUT_TYPE_DUAL (2 << INPUT_TYPE_OFFSET) 7538e783b3SJoonyoung Shim #define INPUT_TYPE_PALM (3 << INPUT_TYPE_OFFSET) 7638e783b3SJoonyoung Shim #define INPUT_TYPE_PROXIMITY (7 << INPUT_TYPE_OFFSET) 7738e783b3SJoonyoung Shim #define GESTURE_CODE_OFFSET 3 7838e783b3SJoonyoung Shim #define GESTURE_CODE_NO (0 << GESTURE_CODE_OFFSET) 7938e783b3SJoonyoung Shim 8038e783b3SJoonyoung Shim #define MCS5000_TS_X_POS_UPPER 0x11 8138e783b3SJoonyoung Shim #define MCS5000_TS_X_POS_LOWER 0x12 8238e783b3SJoonyoung Shim #define MCS5000_TS_Y_POS_UPPER 0x13 8338e783b3SJoonyoung Shim #define MCS5000_TS_Y_POS_LOWER 0x14 8438e783b3SJoonyoung Shim #define MCS5000_TS_Z_POS 0x15 8538e783b3SJoonyoung Shim #define MCS5000_TS_WIDTH 0x16 8638e783b3SJoonyoung Shim #define MCS5000_TS_GESTURE_VAL 0x17 8738e783b3SJoonyoung Shim #define MCS5000_TS_MODULE_REV 0x20 8838e783b3SJoonyoung Shim #define MCS5000_TS_FIRMWARE_VER 0x21 8938e783b3SJoonyoung Shim 9038e783b3SJoonyoung Shim /* Touchscreen absolute values */ 9138e783b3SJoonyoung Shim #define MCS5000_MAX_XC 0x3ff 9238e783b3SJoonyoung Shim #define MCS5000_MAX_YC 0x3ff 9338e783b3SJoonyoung Shim 9438e783b3SJoonyoung Shim enum mcs5000_ts_read_offset { 9538e783b3SJoonyoung Shim READ_INPUT_INFO, 9638e783b3SJoonyoung Shim READ_X_POS_UPPER, 9738e783b3SJoonyoung Shim READ_X_POS_LOWER, 9838e783b3SJoonyoung Shim READ_Y_POS_UPPER, 9938e783b3SJoonyoung Shim READ_Y_POS_LOWER, 10038e783b3SJoonyoung Shim READ_BLOCK_SIZE, 10138e783b3SJoonyoung Shim }; 10238e783b3SJoonyoung Shim 10338e783b3SJoonyoung Shim /* Each client has this additional data */ 10438e783b3SJoonyoung Shim struct mcs5000_ts_data { 10538e783b3SJoonyoung Shim struct i2c_client *client; 10638e783b3SJoonyoung Shim struct input_dev *input_dev; 107312e8e8aSJoonyoung Shim const struct mcs_platform_data *platform_data; 10838e783b3SJoonyoung Shim }; 10938e783b3SJoonyoung Shim 11038e783b3SJoonyoung Shim static irqreturn_t mcs5000_ts_interrupt(int irq, void *dev_id) 11138e783b3SJoonyoung Shim { 11238e783b3SJoonyoung Shim struct mcs5000_ts_data *data = dev_id; 11338e783b3SJoonyoung Shim struct i2c_client *client = data->client; 11438e783b3SJoonyoung Shim u8 buffer[READ_BLOCK_SIZE]; 11538e783b3SJoonyoung Shim int err; 11638e783b3SJoonyoung Shim int x; 11738e783b3SJoonyoung Shim int y; 11838e783b3SJoonyoung Shim 11938e783b3SJoonyoung Shim err = i2c_smbus_read_i2c_block_data(client, MCS5000_TS_INPUT_INFO, 12038e783b3SJoonyoung Shim READ_BLOCK_SIZE, buffer); 12138e783b3SJoonyoung Shim if (err < 0) { 12238e783b3SJoonyoung Shim dev_err(&client->dev, "%s, err[%d]\n", __func__, err); 12338e783b3SJoonyoung Shim goto out; 12438e783b3SJoonyoung Shim } 12538e783b3SJoonyoung Shim 12638e783b3SJoonyoung Shim switch (buffer[READ_INPUT_INFO]) { 12738e783b3SJoonyoung Shim case INPUT_TYPE_NONTOUCH: 12838e783b3SJoonyoung Shim input_report_key(data->input_dev, BTN_TOUCH, 0); 12938e783b3SJoonyoung Shim input_sync(data->input_dev); 13038e783b3SJoonyoung Shim break; 13138e783b3SJoonyoung Shim 13238e783b3SJoonyoung Shim case INPUT_TYPE_SINGLE: 13338e783b3SJoonyoung Shim x = (buffer[READ_X_POS_UPPER] << 8) | buffer[READ_X_POS_LOWER]; 13438e783b3SJoonyoung Shim y = (buffer[READ_Y_POS_UPPER] << 8) | buffer[READ_Y_POS_LOWER]; 13538e783b3SJoonyoung Shim 13638e783b3SJoonyoung Shim input_report_key(data->input_dev, BTN_TOUCH, 1); 13738e783b3SJoonyoung Shim input_report_abs(data->input_dev, ABS_X, x); 13838e783b3SJoonyoung Shim input_report_abs(data->input_dev, ABS_Y, y); 13938e783b3SJoonyoung Shim input_sync(data->input_dev); 14038e783b3SJoonyoung Shim break; 14138e783b3SJoonyoung Shim 14238e783b3SJoonyoung Shim case INPUT_TYPE_DUAL: 14338e783b3SJoonyoung Shim /* TODO */ 14438e783b3SJoonyoung Shim break; 14538e783b3SJoonyoung Shim 14638e783b3SJoonyoung Shim case INPUT_TYPE_PALM: 14738e783b3SJoonyoung Shim /* TODO */ 14838e783b3SJoonyoung Shim break; 14938e783b3SJoonyoung Shim 15038e783b3SJoonyoung Shim case INPUT_TYPE_PROXIMITY: 15138e783b3SJoonyoung Shim /* TODO */ 15238e783b3SJoonyoung Shim break; 15338e783b3SJoonyoung Shim 15438e783b3SJoonyoung Shim default: 15538e783b3SJoonyoung Shim dev_err(&client->dev, "Unknown ts input type %d\n", 15638e783b3SJoonyoung Shim buffer[READ_INPUT_INFO]); 15738e783b3SJoonyoung Shim break; 15838e783b3SJoonyoung Shim } 15938e783b3SJoonyoung Shim 16038e783b3SJoonyoung Shim out: 16138e783b3SJoonyoung Shim return IRQ_HANDLED; 16238e783b3SJoonyoung Shim } 16338e783b3SJoonyoung Shim 164f5189d07SBeomho Seo static void mcs5000_ts_phys_init(struct mcs5000_ts_data *data, 165f5189d07SBeomho Seo const struct mcs_platform_data *platform_data) 16638e783b3SJoonyoung Shim { 16738e783b3SJoonyoung Shim struct i2c_client *client = data->client; 16838e783b3SJoonyoung Shim 16938e783b3SJoonyoung Shim /* Touch reset & sleep mode */ 17038e783b3SJoonyoung Shim i2c_smbus_write_byte_data(client, MCS5000_TS_OP_MODE, 17138e783b3SJoonyoung Shim RESET_EXT_SOFT | OP_MODE_SLEEP); 17238e783b3SJoonyoung Shim 17338e783b3SJoonyoung Shim /* Touch size */ 17438e783b3SJoonyoung Shim i2c_smbus_write_byte_data(client, MCS5000_TS_X_SIZE_UPPER, 17538e783b3SJoonyoung Shim platform_data->x_size >> 8); 17638e783b3SJoonyoung Shim i2c_smbus_write_byte_data(client, MCS5000_TS_X_SIZE_LOWER, 17738e783b3SJoonyoung Shim platform_data->x_size & 0xff); 17838e783b3SJoonyoung Shim i2c_smbus_write_byte_data(client, MCS5000_TS_Y_SIZE_UPPER, 17938e783b3SJoonyoung Shim platform_data->y_size >> 8); 18038e783b3SJoonyoung Shim i2c_smbus_write_byte_data(client, MCS5000_TS_Y_SIZE_LOWER, 18138e783b3SJoonyoung Shim platform_data->y_size & 0xff); 18238e783b3SJoonyoung Shim 18338e783b3SJoonyoung Shim /* Touch active mode & 80 report rate */ 18438e783b3SJoonyoung Shim i2c_smbus_write_byte_data(data->client, MCS5000_TS_OP_MODE, 18538e783b3SJoonyoung Shim OP_MODE_ACTIVE | REPORT_RATE_80); 18638e783b3SJoonyoung Shim } 18738e783b3SJoonyoung Shim 1885298cc4cSBill Pemberton static int mcs5000_ts_probe(struct i2c_client *client, 18938e783b3SJoonyoung Shim const struct i2c_device_id *id) 19038e783b3SJoonyoung Shim { 191f5189d07SBeomho Seo const struct mcs_platform_data *pdata; 19238e783b3SJoonyoung Shim struct mcs5000_ts_data *data; 19338e783b3SJoonyoung Shim struct input_dev *input_dev; 194f5189d07SBeomho Seo int error; 19538e783b3SJoonyoung Shim 196f5189d07SBeomho Seo pdata = dev_get_platdata(&client->dev); 197f5189d07SBeomho Seo if (!pdata) 19838e783b3SJoonyoung Shim return -EINVAL; 19938e783b3SJoonyoung Shim 200f5189d07SBeomho Seo data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); 201f5189d07SBeomho Seo if (!data) { 20238e783b3SJoonyoung Shim dev_err(&client->dev, "Failed to allocate memory\n"); 203f5189d07SBeomho Seo return -ENOMEM; 20438e783b3SJoonyoung Shim } 20538e783b3SJoonyoung Shim 20638e783b3SJoonyoung Shim data->client = client; 207f5189d07SBeomho Seo 208f5189d07SBeomho Seo input_dev = devm_input_allocate_device(&client->dev); 209f5189d07SBeomho Seo if (!input_dev) { 210f5189d07SBeomho Seo dev_err(&client->dev, "Failed to allocate input device\n"); 211f5189d07SBeomho Seo return -ENOMEM; 212f5189d07SBeomho Seo } 21338e783b3SJoonyoung Shim 21421d128a7SBeomho Seo input_dev->name = "MELFAS MCS-5000 Touchscreen"; 21538e783b3SJoonyoung Shim input_dev->id.bustype = BUS_I2C; 21638e783b3SJoonyoung Shim input_dev->dev.parent = &client->dev; 21738e783b3SJoonyoung Shim 21838e783b3SJoonyoung Shim __set_bit(EV_ABS, input_dev->evbit); 21938e783b3SJoonyoung Shim __set_bit(EV_KEY, input_dev->evbit); 22038e783b3SJoonyoung Shim __set_bit(BTN_TOUCH, input_dev->keybit); 22138e783b3SJoonyoung Shim input_set_abs_params(input_dev, ABS_X, 0, MCS5000_MAX_XC, 0, 0); 22238e783b3SJoonyoung Shim input_set_abs_params(input_dev, ABS_Y, 0, MCS5000_MAX_YC, 0, 0); 22338e783b3SJoonyoung Shim 22438e783b3SJoonyoung Shim input_set_drvdata(input_dev, data); 225f5189d07SBeomho Seo data->input_dev = input_dev; 22638e783b3SJoonyoung Shim 227f5189d07SBeomho Seo if (pdata->cfg_pin) 228f5189d07SBeomho Seo pdata->cfg_pin(); 22938e783b3SJoonyoung Shim 230f5189d07SBeomho Seo error = devm_request_threaded_irq(&client->dev, client->irq, 231f5189d07SBeomho Seo NULL, mcs5000_ts_interrupt, 232f5189d07SBeomho Seo IRQF_TRIGGER_LOW | IRQF_ONESHOT, 233f5189d07SBeomho Seo "mcs5000_ts", data); 234f5189d07SBeomho Seo if (error) { 23538e783b3SJoonyoung Shim dev_err(&client->dev, "Failed to register interrupt\n"); 236f5189d07SBeomho Seo return error; 23738e783b3SJoonyoung Shim } 23838e783b3SJoonyoung Shim 239f5189d07SBeomho Seo error = input_register_device(data->input_dev); 240f5189d07SBeomho Seo if (error) { 241f5189d07SBeomho Seo dev_err(&client->dev, "Failed to register input device\n"); 242f5189d07SBeomho Seo return error; 243f5189d07SBeomho Seo } 24438e783b3SJoonyoung Shim 245f5189d07SBeomho Seo mcs5000_ts_phys_init(data, pdata); 24638e783b3SJoonyoung Shim i2c_set_clientdata(client, data); 24738e783b3SJoonyoung Shim 24838e783b3SJoonyoung Shim return 0; 24938e783b3SJoonyoung Shim } 25038e783b3SJoonyoung Shim 25138e783b3SJoonyoung Shim #ifdef CONFIG_PM 25292b672e2SMark Brown static int mcs5000_ts_suspend(struct device *dev) 25338e783b3SJoonyoung Shim { 25492b672e2SMark Brown struct i2c_client *client = to_i2c_client(dev); 25592b672e2SMark Brown 25638e783b3SJoonyoung Shim /* Touch sleep mode */ 25738e783b3SJoonyoung Shim i2c_smbus_write_byte_data(client, MCS5000_TS_OP_MODE, OP_MODE_SLEEP); 25838e783b3SJoonyoung Shim 25938e783b3SJoonyoung Shim return 0; 26038e783b3SJoonyoung Shim } 26138e783b3SJoonyoung Shim 26292b672e2SMark Brown static int mcs5000_ts_resume(struct device *dev) 26338e783b3SJoonyoung Shim { 26492b672e2SMark Brown struct i2c_client *client = to_i2c_client(dev); 26538e783b3SJoonyoung Shim struct mcs5000_ts_data *data = i2c_get_clientdata(client); 266f5189d07SBeomho Seo const struct mcs_platform_data *pdata = dev_get_platdata(dev); 26738e783b3SJoonyoung Shim 268f5189d07SBeomho Seo mcs5000_ts_phys_init(data, pdata); 26938e783b3SJoonyoung Shim 27038e783b3SJoonyoung Shim return 0; 27138e783b3SJoonyoung Shim } 272f5189d07SBeomho Seo #endif 27392b672e2SMark Brown 27492b672e2SMark Brown static SIMPLE_DEV_PM_OPS(mcs5000_ts_pm, mcs5000_ts_suspend, mcs5000_ts_resume); 27538e783b3SJoonyoung Shim 27638e783b3SJoonyoung Shim static const struct i2c_device_id mcs5000_ts_id[] = { 27738e783b3SJoonyoung Shim { "mcs5000_ts", 0 }, 27838e783b3SJoonyoung Shim { } 27938e783b3SJoonyoung Shim }; 28038e783b3SJoonyoung Shim MODULE_DEVICE_TABLE(i2c, mcs5000_ts_id); 28138e783b3SJoonyoung Shim 28238e783b3SJoonyoung Shim static struct i2c_driver mcs5000_ts_driver = { 28338e783b3SJoonyoung Shim .probe = mcs5000_ts_probe, 28438e783b3SJoonyoung Shim .driver = { 28538e783b3SJoonyoung Shim .name = "mcs5000_ts", 28692b672e2SMark Brown .pm = &mcs5000_ts_pm, 28738e783b3SJoonyoung Shim }, 28838e783b3SJoonyoung Shim .id_table = mcs5000_ts_id, 28938e783b3SJoonyoung Shim }; 29038e783b3SJoonyoung Shim 2911b92c1cfSAxel Lin module_i2c_driver(mcs5000_ts_driver); 29238e783b3SJoonyoung Shim 29338e783b3SJoonyoung Shim /* Module information */ 29438e783b3SJoonyoung Shim MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 29538e783b3SJoonyoung Shim MODULE_DESCRIPTION("Touchscreen driver for MELFAS MCS-5000 controller"); 29638e783b3SJoonyoung Shim MODULE_LICENSE("GPL"); 297