Input: add MELFAS mms114 touchscreen driver
This is a initial driver for new touchscreen chip mms114 of MELFAS. It uses I2C interface and supports 10 multi touch. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Joonyoung Shim
Dmitry Torokhov
parent
69690bec40
commit
07b8481d4a
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@ -369,6 +369,18 @@ config TOUCHSCREEN_MCS5000
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To compile this driver as a module, choose M here: the
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module will be called mcs5000_ts.
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config TOUCHSCREEN_MMS114
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tristate "MELFAS MMS114 touchscreen"
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depends on I2C
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help
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Say Y here if you have the MELFAS MMS114 touchscreen controller
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chip in your system.
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If unsure, say N.
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To compile this driver as a module, choose M here: the
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module will be called mms114.
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config TOUCHSCREEN_MTOUCH
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tristate "MicroTouch serial touchscreens"
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select SERIO
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@ -38,6 +38,7 @@ obj-$(CONFIG_TOUCHSCREEN_MAX11801) += max11801_ts.o
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obj-$(CONFIG_TOUCHSCREEN_MC13783) += mc13783_ts.o
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obj-$(CONFIG_TOUCHSCREEN_MCS5000) += mcs5000_ts.o
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obj-$(CONFIG_TOUCHSCREEN_MIGOR) += migor_ts.o
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obj-$(CONFIG_TOUCHSCREEN_MMS114) += mms114.o
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obj-$(CONFIG_TOUCHSCREEN_MTOUCH) += mtouch.o
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obj-$(CONFIG_TOUCHSCREEN_MK712) += mk712.o
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obj-$(CONFIG_TOUCHSCREEN_HP600) += hp680_ts_input.o
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@ -0,0 +1,544 @@
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/*
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* Copyright (C) 2012 Samsung Electronics Co.Ltd
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* Author: Joonyoung Shim <jy0922.shim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/i2c/mms114.h>
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#include <linux/input/mt.h>
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#include <linux/interrupt.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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/* Write only registers */
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#define MMS114_MODE_CONTROL 0x01
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#define MMS114_OPERATION_MODE_MASK 0xE
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#define MMS114_ACTIVE (1 << 1)
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#define MMS114_XY_RESOLUTION_H 0x02
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#define MMS114_X_RESOLUTION 0x03
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#define MMS114_Y_RESOLUTION 0x04
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#define MMS114_CONTACT_THRESHOLD 0x05
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#define MMS114_MOVING_THRESHOLD 0x06
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/* Read only registers */
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#define MMS114_PACKET_SIZE 0x0F
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#define MMS114_INFOMATION 0x10
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#define MMS114_TSP_REV 0xF0
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/* Minimum delay time is 50us between stop and start signal of i2c */
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#define MMS114_I2C_DELAY 50
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/* 200ms needs after power on */
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#define MMS114_POWERON_DELAY 200
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/* Touchscreen absolute values */
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#define MMS114_MAX_AREA 0xff
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#define MMS114_MAX_TOUCH 10
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#define MMS114_PACKET_NUM 8
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/* Touch type */
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#define MMS114_TYPE_NONE 0
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#define MMS114_TYPE_TOUCHSCREEN 1
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#define MMS114_TYPE_TOUCHKEY 2
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struct mms114_data {
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struct i2c_client *client;
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struct input_dev *input_dev;
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struct regulator *core_reg;
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struct regulator *io_reg;
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const struct mms114_platform_data *pdata;
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/* Use cache data for mode control register(write only) */
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u8 cache_mode_control;
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};
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struct mms114_touch {
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u8 id:4, reserved_bit4:1, type:2, pressed:1;
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u8 x_hi:4, y_hi:4;
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u8 x_lo;
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u8 y_lo;
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u8 width;
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u8 strength;
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u8 reserved[2];
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} __packed;
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static int __mms114_read_reg(struct mms114_data *data, unsigned int reg,
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unsigned int len, u8 *val)
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{
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struct i2c_client *client = data->client;
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struct i2c_msg xfer[2];
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u8 buf = reg & 0xff;
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int error;
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if (reg <= MMS114_MODE_CONTROL && reg + len > MMS114_MODE_CONTROL)
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BUG();
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/* Write register: use repeated start */
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xfer[0].addr = client->addr;
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xfer[0].flags = I2C_M_TEN | I2C_M_NOSTART;
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xfer[0].len = 1;
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xfer[0].buf = &buf;
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/* Read data */
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xfer[1].addr = client->addr;
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xfer[1].flags = I2C_M_RD;
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xfer[1].len = len;
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xfer[1].buf = val;
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error = i2c_transfer(client->adapter, xfer, 2);
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if (error != 2) {
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dev_err(&client->dev,
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"%s: i2c transfer failed (%d)\n", __func__, error);
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return error < 0 ? error : -EIO;
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}
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udelay(MMS114_I2C_DELAY);
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return 0;
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}
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static int mms114_read_reg(struct mms114_data *data, unsigned int reg)
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{
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u8 val;
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int error;
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if (reg == MMS114_MODE_CONTROL)
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return data->cache_mode_control;
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error = __mms114_read_reg(data, reg, 1, &val);
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return error < 0 ? error : val;
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}
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static int mms114_write_reg(struct mms114_data *data, unsigned int reg,
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unsigned int val)
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{
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struct i2c_client *client = data->client;
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u8 buf[2];
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int error;
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buf[0] = reg & 0xff;
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buf[1] = val & 0xff;
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error = i2c_master_send(client, buf, 2);
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if (error != 2) {
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dev_err(&client->dev,
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"%s: i2c send failed (%d)\n", __func__, error);
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return error < 0 ? error : -EIO;
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}
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udelay(MMS114_I2C_DELAY);
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if (reg == MMS114_MODE_CONTROL)
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data->cache_mode_control = val;
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return 0;
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}
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static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *touch)
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{
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const struct mms114_platform_data *pdata = data->pdata;
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struct i2c_client *client = data->client;
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struct input_dev *input_dev = data->input_dev;
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unsigned int id;
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unsigned int x;
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unsigned int y;
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if (touch->id > MMS114_MAX_TOUCH) {
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dev_err(&client->dev, "Wrong touch id (%d)\n", touch->id);
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return;
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}
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if (touch->type != MMS114_TYPE_TOUCHSCREEN) {
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dev_err(&client->dev, "Wrong touch type (%d)\n", touch->type);
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return;
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}
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id = touch->id - 1;
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x = touch->x_lo | touch->x_hi << 8;
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y = touch->y_lo | touch->y_hi << 8;
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if (x > pdata->x_size || y > pdata->y_size) {
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dev_dbg(&client->dev,
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"Wrong touch coordinates (%d, %d)\n", x, y);
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return;
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}
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if (pdata->x_invert)
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x = pdata->x_size - x;
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if (pdata->y_invert)
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y = pdata->y_size - y;
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dev_dbg(&client->dev,
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"id: %d, type: %d, pressed: %d, x: %d, y: %d, width: %d, strength: %d\n",
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id, touch->type, touch->pressed,
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x, y, touch->width, touch->strength);
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input_mt_slot(input_dev, id);
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input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, touch->pressed);
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if (touch->pressed) {
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input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, touch->width);
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input_report_abs(input_dev, ABS_MT_POSITION_X, x);
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input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
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input_report_abs(input_dev, ABS_MT_PRESSURE, touch->strength);
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}
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}
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static irqreturn_t mms114_interrupt(int irq, void *dev_id)
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{
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struct mms114_data *data = dev_id;
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struct input_dev *input_dev = data->input_dev;
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struct mms114_touch touch[MMS114_MAX_TOUCH];
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int packet_size;
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int touch_size;
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int index;
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int error;
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mutex_lock(&input_dev->mutex);
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if (!input_dev->users) {
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mutex_unlock(&input_dev->mutex);
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goto out;
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}
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mutex_unlock(&input_dev->mutex);
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packet_size = mms114_read_reg(data, MMS114_PACKET_SIZE);
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if (packet_size <= 0)
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goto out;
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touch_size = packet_size / MMS114_PACKET_NUM;
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error = __mms114_read_reg(data, MMS114_INFOMATION, packet_size,
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(u8 *)touch);
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if (error < 0)
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goto out;
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for (index = 0; index < touch_size; index++)
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mms114_process_mt(data, touch + index);
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input_mt_report_pointer_emulation(data->input_dev, true);
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input_sync(data->input_dev);
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out:
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return IRQ_HANDLED;
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}
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static int mms114_set_active(struct mms114_data *data, bool active)
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{
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int val;
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val = mms114_read_reg(data, MMS114_MODE_CONTROL);
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if (val < 0)
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return val;
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val &= ~MMS114_OPERATION_MODE_MASK;
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/* If active is false, sleep mode */
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if (active)
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val |= MMS114_ACTIVE;
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return mms114_write_reg(data, MMS114_MODE_CONTROL, val);
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}
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static int mms114_get_version(struct mms114_data *data)
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{
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struct device *dev = &data->client->dev;
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u8 buf[6];
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int error;
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error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
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if (error < 0)
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return error;
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dev_info(dev, "TSP Rev: 0x%x, HW Rev: 0x%x, Firmware Ver: 0x%x\n",
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buf[0], buf[1], buf[3]);
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return 0;
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}
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static int mms114_setup_regs(struct mms114_data *data)
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{
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const struct mms114_platform_data *pdata = data->pdata;
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int val;
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int error;
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error = mms114_get_version(data);
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if (error < 0)
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return error;
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error = mms114_set_active(data, true);
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if (error < 0)
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return error;
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val = (pdata->x_size >> 8) & 0xf;
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val |= ((pdata->y_size >> 8) & 0xf) << 4;
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error = mms114_write_reg(data, MMS114_XY_RESOLUTION_H, val);
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if (error < 0)
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return error;
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val = pdata->x_size & 0xff;
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error = mms114_write_reg(data, MMS114_X_RESOLUTION, val);
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if (error < 0)
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return error;
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val = pdata->y_size & 0xff;
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error = mms114_write_reg(data, MMS114_Y_RESOLUTION, val);
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if (error < 0)
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return error;
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if (pdata->contact_threshold) {
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error = mms114_write_reg(data, MMS114_CONTACT_THRESHOLD,
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pdata->contact_threshold);
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if (error < 0)
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return error;
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}
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if (pdata->moving_threshold) {
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error = mms114_write_reg(data, MMS114_MOVING_THRESHOLD,
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pdata->moving_threshold);
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if (error < 0)
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return error;
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}
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return 0;
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}
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static int mms114_start(struct mms114_data *data)
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{
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struct i2c_client *client = data->client;
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int error;
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if (data->core_reg)
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regulator_enable(data->core_reg);
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if (data->io_reg)
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regulator_enable(data->io_reg);
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mdelay(MMS114_POWERON_DELAY);
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error = mms114_setup_regs(data);
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if (error < 0)
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return error;
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if (data->pdata->cfg_pin)
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data->pdata->cfg_pin(true);
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enable_irq(client->irq);
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return 0;
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}
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static void mms114_stop(struct mms114_data *data)
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{
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struct i2c_client *client = data->client;
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disable_irq(client->irq);
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if (data->pdata->cfg_pin)
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data->pdata->cfg_pin(false);
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if (data->io_reg)
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regulator_disable(data->io_reg);
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if (data->core_reg)
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regulator_disable(data->core_reg);
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}
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static int mms114_input_open(struct input_dev *dev)
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{
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struct mms114_data *data = input_get_drvdata(dev);
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return mms114_start(data);
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}
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static void mms114_input_close(struct input_dev *dev)
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{
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struct mms114_data *data = input_get_drvdata(dev);
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mms114_stop(data);
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}
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static int __devinit mms114_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct mms114_data *data;
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struct input_dev *input_dev;
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int error;
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if (!client->dev.platform_data) {
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dev_err(&client->dev, "Need platform data\n");
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return -EINVAL;
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}
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_PROTOCOL_MANGLING)) {
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dev_err(&client->dev,
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"Need i2c bus that supports protocol mangling\n");
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return -ENODEV;
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}
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data = kzalloc(sizeof(struct mms114_data), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!data || !input_dev) {
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dev_err(&client->dev, "Failed to allocate memory\n");
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error = -ENOMEM;
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goto err_free_mem;
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}
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data->client = client;
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data->input_dev = input_dev;
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data->pdata = client->dev.platform_data;
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input_dev->name = "MELPAS MMS114 Touchscreen";
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input_dev->id.bustype = BUS_I2C;
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input_dev->dev.parent = &client->dev;
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input_dev->open = mms114_input_open;
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input_dev->close = mms114_input_close;
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__set_bit(EV_ABS, input_dev->evbit);
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__set_bit(EV_KEY, input_dev->evbit);
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__set_bit(BTN_TOUCH, input_dev->keybit);
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input_set_abs_params(input_dev, ABS_X, 0, data->pdata->x_size, 0, 0);
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input_set_abs_params(input_dev, ABS_Y, 0, data->pdata->y_size, 0, 0);
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/* For multi touch */
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input_mt_init_slots(input_dev, MMS114_MAX_TOUCH);
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input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
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0, MMS114_MAX_AREA, 0, 0);
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input_set_abs_params(input_dev, ABS_MT_POSITION_X,
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0, data->pdata->x_size, 0, 0);
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input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
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0, data->pdata->y_size, 0, 0);
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input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
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input_set_drvdata(input_dev, data);
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i2c_set_clientdata(client, data);
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data->core_reg = regulator_get(&client->dev, "avdd");
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if (IS_ERR(data->core_reg)) {
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error = PTR_ERR(data->core_reg);
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dev_err(&client->dev,
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"Unable to get the Core regulator (%d)\n", error);
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goto err_free_mem;
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}
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data->io_reg = regulator_get(&client->dev, "vdd");
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if (IS_ERR(data->io_reg)) {
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error = PTR_ERR(data->io_reg);
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dev_err(&client->dev,
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"Unable to get the IO regulator (%d)\n", error);
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goto err_core_reg;
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}
|
||||
|
||||
error = request_threaded_irq(client->irq, NULL, mms114_interrupt,
|
||||
IRQF_TRIGGER_FALLING | IRQF_ONESHOT, "mms114", data);
|
||||
if (error) {
|
||||
dev_err(&client->dev, "Failed to register interrupt\n");
|
||||
goto err_io_reg;
|
||||
}
|
||||
disable_irq(client->irq);
|
||||
|
||||
error = input_register_device(data->input_dev);
|
||||
if (error)
|
||||
goto err_free_irq;
|
||||
|
||||
return 0;
|
||||
|
||||
err_free_irq:
|
||||
free_irq(client->irq, data);
|
||||
err_io_reg:
|
||||
regulator_put(data->io_reg);
|
||||
err_core_reg:
|
||||
regulator_put(data->core_reg);
|
||||
err_free_mem:
|
||||
input_free_device(input_dev);
|
||||
kfree(data);
|
||||
return error;
|
||||
}
|
||||
|
||||
static int __devexit mms114_remove(struct i2c_client *client)
|
||||
{
|
||||
struct mms114_data *data = i2c_get_clientdata(client);
|
||||
|
||||
free_irq(client->irq, data);
|
||||
regulator_put(data->io_reg);
|
||||
regulator_put(data->core_reg);
|
||||
input_unregister_device(data->input_dev);
|
||||
kfree(data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
static int mms114_suspend(struct device *dev)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
struct mms114_data *data = i2c_get_clientdata(client);
|
||||
struct input_dev *input_dev = data->input_dev;
|
||||
int id;
|
||||
|
||||
/* Release all touch */
|
||||
for (id = 0; id < MMS114_MAX_TOUCH; id++) {
|
||||
input_mt_slot(input_dev, id);
|
||||
input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, false);
|
||||
}
|
||||
|
||||
input_mt_report_pointer_emulation(input_dev, true);
|
||||
input_sync(input_dev);
|
||||
|
||||
mutex_lock(&input_dev->mutex);
|
||||
if (input_dev->users)
|
||||
mms114_stop(data);
|
||||
mutex_unlock(&input_dev->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mms114_resume(struct device *dev)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
struct mms114_data *data = i2c_get_clientdata(client);
|
||||
struct input_dev *input_dev = data->input_dev;
|
||||
int error;
|
||||
|
||||
mutex_lock(&input_dev->mutex);
|
||||
if (input_dev->users) {
|
||||
error = mms114_start(data);
|
||||
if (error < 0) {
|
||||
mutex_unlock(&input_dev->mutex);
|
||||
return error;
|
||||
}
|
||||
}
|
||||
mutex_unlock(&input_dev->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(mms114_pm_ops, mms114_suspend, mms114_resume);
|
||||
|
||||
static const struct i2c_device_id mms114_id[] = {
|
||||
{ "mms114", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, mms114_id);
|
||||
|
||||
static struct i2c_driver mms114_driver = {
|
||||
.driver = {
|
||||
.name = "mms114",
|
||||
.owner = THIS_MODULE,
|
||||
.pm = &mms114_pm_ops,
|
||||
},
|
||||
.probe = mms114_probe,
|
||||
.remove = __devexit_p(mms114_remove),
|
||||
.id_table = mms114_id,
|
||||
};
|
||||
|
||||
module_i2c_driver(mms114_driver);
|
||||
|
||||
/* Module information */
|
||||
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
|
||||
MODULE_DESCRIPTION("MELFAS mms114 Touchscreen driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -0,0 +1,24 @@
|
|||
/*
|
||||
* Copyright (C) 2012 Samsung Electronics Co.Ltd
|
||||
* Author: Joonyoung Shim <jy0922.shim@samsung.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundationr
|
||||
*/
|
||||
|
||||
#ifndef __LINUX_MMS114_H
|
||||
#define __LINUX_MMS114_H
|
||||
|
||||
struct mms114_platform_data {
|
||||
unsigned int x_size;
|
||||
unsigned int y_size;
|
||||
unsigned int contact_threshold;
|
||||
unsigned int moving_threshold;
|
||||
bool x_invert;
|
||||
bool y_invert;
|
||||
|
||||
void (*cfg_pin)(bool);
|
||||
};
|
||||
|
||||
#endif /* __LINUX_MMS114_H */
|
||||
Loading…
Reference in New Issue