+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * 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
- */
-
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/input.h>
-#include <linux/irq.h>
-#include <linux/platform_data/mcs.h>
-#include <linux/slab.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 mcs_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 mcs_platform_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 mcs5000_ts_probe(struct i2c_client *client)
-{
- const struct mcs_platform_data *pdata;
- struct mcs5000_ts_data *data;
- struct input_dev *input_dev;
- int error;
-
- pdata = dev_get_platdata(&client->dev);
- if (!pdata)
- return -EINVAL;
-
- data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
- if (!data) {
- dev_err(&client->dev, "Failed to allocate memory\n");
- return -ENOMEM;
- }
-
- data->client = client;
-
- input_dev = devm_input_allocate_device(&client->dev);
- if (!input_dev) {
- dev_err(&client->dev, "Failed to allocate input device\n");
- return -ENOMEM;
- }
-
- input_dev->name = "MELFAS 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);
-
- data->input_dev = input_dev;
-
- if (pdata->cfg_pin)
- pdata->cfg_pin();
-
- error = devm_request_threaded_irq(&client->dev, client->irq,
- NULL, mcs5000_ts_interrupt,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
- "mcs5000_ts", data);
- if (error) {
- dev_err(&client->dev, "Failed to register interrupt\n");
- return error;
- }
-
- error = input_register_device(data->input_dev);
- if (error) {
- dev_err(&client->dev, "Failed to register input device\n");
- return error;
- }
-
- mcs5000_ts_phys_init(data, pdata);
- i2c_set_clientdata(client, data);
-
- return 0;
-}
-
-static int mcs5000_ts_suspend(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
-
- /* Touch sleep mode */
- i2c_smbus_write_byte_data(client, MCS5000_TS_OP_MODE, OP_MODE_SLEEP);
-
- return 0;
-}
-
-static int mcs5000_ts_resume(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct mcs5000_ts_data *data = i2c_get_clientdata(client);
- const struct mcs_platform_data *pdata = dev_get_platdata(dev);
-
- mcs5000_ts_phys_init(data, pdata);
-
- return 0;
-}
-
-static DEFINE_SIMPLE_DEV_PM_OPS(mcs5000_ts_pm,
- mcs5000_ts_suspend, mcs5000_ts_resume);
-
-static const struct i2c_device_id mcs5000_ts_id[] = {
- { "mcs5000_ts" },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, mcs5000_ts_id);
-
-static struct i2c_driver mcs5000_ts_driver = {
- .probe = mcs5000_ts_probe,
- .driver = {
- .name = "mcs5000_ts",
- .pm = pm_sleep_ptr(&mcs5000_ts_pm),
- },
- .id_table = mcs5000_ts_id,
-};
-
-module_i2c_driver(mcs5000_ts_driver);
-
-/* Module information */
-MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
-MODULE_DESCRIPTION("Touchscreen driver for MELFAS MCS-5000 controller");
-MODULE_LICENSE("GPL");
projects / users / jedix / linux-maple.git / commitdiff