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linux/drivers/input/touchscreen/melfas_mip4.c
Thomas Gleixner c942fddf87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 
Based on 3 normalized pattern(s):

  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 this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

  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 [author] [kishon] [vijay] [abraham]
  [i] [kishon]@[ti] [com] this program is distributed in the hope that
  it will be useful but without any warranty without even the implied
  warranty of merchantability or fitness for a particular purpose see
  the gnu general public license for more details

  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 [author] [graeme] [gregory]
  [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
  [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
  [hk] [hemahk]@[ti] [com] this program is distributed in the hope
  that it will be useful but without any warranty without even the
  implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* MELFAS MIP4 Touchscreen
*
* Copyright (C) 2016 MELFAS Inc.
*
* Author : Sangwon Jee <jeesw@melfas.com>
*/
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <asm/unaligned.h>
#define MIP4_DEVICE_NAME "mip4_ts"
/*****************************************************************
* Protocol
* Version : MIP 4.0 Rev 5.4
*****************************************************************/
/* Address */
#define MIP4_R0_BOOT 0x00
#define MIP4_R1_BOOT_MODE 0x01
#define MIP4_R1_BOOT_BUF_ADDR 0x10
#define MIP4_R1_BOOT_STATUS 0x20
#define MIP4_R1_BOOT_CMD 0x30
#define MIP4_R1_BOOT_TARGET_ADDR 0x40
#define MIP4_R1_BOOT_SIZE 0x44
#define MIP4_R0_INFO 0x01
#define MIP4_R1_INFO_PRODUCT_NAME 0x00
#define MIP4_R1_INFO_RESOLUTION_X 0x10
#define MIP4_R1_INFO_RESOLUTION_Y 0x12
#define MIP4_R1_INFO_NODE_NUM_X 0x14
#define MIP4_R1_INFO_NODE_NUM_Y 0x15
#define MIP4_R1_INFO_KEY_NUM 0x16
#define MIP4_R1_INFO_PRESSURE_NUM 0x17
#define MIP4_R1_INFO_LENGTH_X 0x18
#define MIP4_R1_INFO_LENGTH_Y 0x1A
#define MIP4_R1_INFO_PPM_X 0x1C
#define MIP4_R1_INFO_PPM_Y 0x1D
#define MIP4_R1_INFO_VERSION_BOOT 0x20
#define MIP4_R1_INFO_VERSION_CORE 0x22
#define MIP4_R1_INFO_VERSION_APP 0x24
#define MIP4_R1_INFO_VERSION_PARAM 0x26
#define MIP4_R1_INFO_SECT_BOOT_START 0x30
#define MIP4_R1_INFO_SECT_BOOT_END 0x31
#define MIP4_R1_INFO_SECT_CORE_START 0x32
#define MIP4_R1_INFO_SECT_CORE_END 0x33
#define MIP4_R1_INFO_SECT_APP_START 0x34
#define MIP4_R1_INFO_SECT_APP_END 0x35
#define MIP4_R1_INFO_SECT_PARAM_START 0x36
#define MIP4_R1_INFO_SECT_PARAM_END 0x37
#define MIP4_R1_INFO_BUILD_DATE 0x40
#define MIP4_R1_INFO_BUILD_TIME 0x44
#define MIP4_R1_INFO_CHECKSUM_PRECALC 0x48
#define MIP4_R1_INFO_CHECKSUM_REALTIME 0x4A
#define MIP4_R1_INFO_PROTOCOL_NAME 0x50
#define MIP4_R1_INFO_PROTOCOL_VERSION 0x58
#define MIP4_R1_INFO_IC_ID 0x70
#define MIP4_R1_INFO_IC_NAME 0x71
#define MIP4_R1_INFO_IC_VENDOR_ID 0x75
#define MIP4_R1_INFO_IC_HW_CATEGORY 0x77
#define MIP4_R1_INFO_CONTACT_THD_SCR 0x78
#define MIP4_R1_INFO_CONTACT_THD_KEY 0x7A
#define MIP4_R1_INFO_PID 0x7C
#define MIP4_R1_INFO_VID 0x7E
#define MIP4_R1_INFO_SLAVE_ADDR 0x80
#define MIP4_R0_EVENT 0x02
#define MIP4_R1_EVENT_SUPPORTED_FUNC 0x00
#define MIP4_R1_EVENT_FORMAT 0x04
#define MIP4_R1_EVENT_SIZE 0x06
#define MIP4_R1_EVENT_PACKET_INFO 0x10
#define MIP4_R1_EVENT_PACKET_DATA 0x11
#define MIP4_R0_CTRL 0x06
#define MIP4_R1_CTRL_READY_STATUS 0x00
#define MIP4_R1_CTRL_EVENT_READY 0x01
#define MIP4_R1_CTRL_MODE 0x10
#define MIP4_R1_CTRL_EVENT_TRIGGER_TYPE 0x11
#define MIP4_R1_CTRL_RECALIBRATE 0x12
#define MIP4_R1_CTRL_POWER_STATE 0x13
#define MIP4_R1_CTRL_GESTURE_TYPE 0x14
#define MIP4_R1_CTRL_DISABLE_ESD_ALERT 0x18
#define MIP4_R1_CTRL_CHARGER_MODE 0x19
#define MIP4_R1_CTRL_HIGH_SENS_MODE 0x1A
#define MIP4_R1_CTRL_WINDOW_MODE 0x1B
#define MIP4_R1_CTRL_PALM_REJECTION 0x1C
#define MIP4_R1_CTRL_EDGE_CORRECTION 0x1D
#define MIP4_R1_CTRL_ENTER_GLOVE_MODE 0x1E
#define MIP4_R1_CTRL_I2C_ON_LPM 0x1F
#define MIP4_R1_CTRL_GESTURE_DEBUG 0x20
#define MIP4_R1_CTRL_PALM_EVENT 0x22
#define MIP4_R1_CTRL_PROXIMITY_SENSING 0x23
/* Value */
#define MIP4_BOOT_MODE_BOOT 0x01
#define MIP4_BOOT_MODE_APP 0x02
#define MIP4_BOOT_STATUS_BUSY 0x05
#define MIP4_BOOT_STATUS_ERROR 0x0E
#define MIP4_BOOT_STATUS_DONE 0xA0
#define MIP4_BOOT_CMD_MASS_ERASE 0x15
#define MIP4_BOOT_CMD_PROGRAM 0x54
#define MIP4_BOOT_CMD_ERASE 0x8F
#define MIP4_BOOT_CMD_WRITE 0xA5
#define MIP4_BOOT_CMD_READ 0xC2
#define MIP4_EVENT_INPUT_TYPE_KEY 0
#define MIP4_EVENT_INPUT_TYPE_SCREEN 1
#define MIP4_EVENT_INPUT_TYPE_PROXIMITY 2
#define I2C_RETRY_COUNT 3 /* 2~ */
#define MIP4_BUF_SIZE 128
#define MIP4_MAX_FINGERS 10
#define MIP4_MAX_KEYS 4
#define MIP4_TOUCH_MAJOR_MIN 0
#define MIP4_TOUCH_MAJOR_MAX 255
#define MIP4_TOUCH_MINOR_MIN 0
#define MIP4_TOUCH_MINOR_MAX 255
#define MIP4_PRESSURE_MIN 0
#define MIP4_PRESSURE_MAX 255
#define MIP4_FW_NAME "melfas_mip4.fw"
#define MIP4_FW_UPDATE_DEBUG 0 /* 0 (default) or 1 */
struct mip4_fw_version {
u16 boot;
u16 core;
u16 app;
u16 param;
};
struct mip4_ts {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *gpio_ce;
char phys[32];
char product_name[16];
u16 product_id;
char ic_name[4];
char fw_name[32];
unsigned int max_x;
unsigned int max_y;
u8 node_x;
u8 node_y;
u8 node_key;
unsigned int ppm_x;
unsigned int ppm_y;
struct mip4_fw_version fw_version;
unsigned int event_size;
unsigned int event_format;
unsigned int key_num;
unsigned short key_code[MIP4_MAX_KEYS];
bool wake_irq_enabled;
u8 buf[MIP4_BUF_SIZE];
};
static int mip4_i2c_xfer(struct mip4_ts *ts,
char *write_buf, unsigned int write_len,
char *read_buf, unsigned int read_len)
{
struct i2c_msg msg[] = {
{
.addr = ts->client->addr,
.flags = 0,
.buf = write_buf,
.len = write_len,
}, {
.addr = ts->client->addr,
.flags = I2C_M_RD,
.buf = read_buf,
.len = read_len,
},
};
int retry = I2C_RETRY_COUNT;
int res;
int error;
do {
res = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
if (res == ARRAY_SIZE(msg))
return 0;
error = res < 0 ? res : -EIO;
dev_err(&ts->client->dev,
"%s - i2c_transfer failed: %d (%d)\n",
__func__, error, res);
} while (--retry);
return error;
}
static void mip4_parse_fw_version(const u8 *buf, struct mip4_fw_version *v)
{
v->boot = get_unaligned_le16(buf + 0);
v->core = get_unaligned_le16(buf + 2);
v->app = get_unaligned_le16(buf + 4);
v->param = get_unaligned_le16(buf + 6);
}
/*
* Read chip firmware version
*/
static int mip4_get_fw_version(struct mip4_ts *ts)
{
u8 cmd[] = { MIP4_R0_INFO, MIP4_R1_INFO_VERSION_BOOT };
u8 buf[sizeof(ts->fw_version)];
int error;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, sizeof(buf));
if (error) {
memset(&ts->fw_version, 0xff, sizeof(ts->fw_version));
return error;
}
mip4_parse_fw_version(buf, &ts->fw_version);
return 0;
}
/*
* Fetch device characteristics
*/
static int mip4_query_device(struct mip4_ts *ts)
{
union i2c_smbus_data dummy;
int error;
u8 cmd[2];
u8 buf[14];
/*
* Make sure there is something at this address as we do not
* consider subsequent failures as fatal.
*/
if (i2c_smbus_xfer(ts->client->adapter, ts->client->addr,
0, I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) {
dev_err(&ts->client->dev, "nothing at this address\n");
return -ENXIO;
}
/* Product name */
cmd[0] = MIP4_R0_INFO;
cmd[1] = MIP4_R1_INFO_PRODUCT_NAME;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd),
ts->product_name, sizeof(ts->product_name));
if (error)
dev_warn(&ts->client->dev,
"Failed to retrieve product name: %d\n", error);
else
dev_dbg(&ts->client->dev, "product name: %.*s\n",
(int)sizeof(ts->product_name), ts->product_name);
/* Product ID */
cmd[0] = MIP4_R0_INFO;
cmd[1] = MIP4_R1_INFO_PID;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 2);
if (error) {
dev_warn(&ts->client->dev,
"Failed to retrieve product id: %d\n", error);
} else {
ts->product_id = get_unaligned_le16(&buf[0]);
dev_dbg(&ts->client->dev, "product id: %04X\n", ts->product_id);
}
/* Firmware name */
snprintf(ts->fw_name, sizeof(ts->fw_name),
"melfas_mip4_%04X.fw", ts->product_id);
dev_dbg(&ts->client->dev, "firmware name: %s\n", ts->fw_name);
/* IC name */
cmd[0] = MIP4_R0_INFO;
cmd[1] = MIP4_R1_INFO_IC_NAME;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd),
ts->ic_name, sizeof(ts->ic_name));
if (error)
dev_warn(&ts->client->dev,
"Failed to retrieve IC name: %d\n", error);
else
dev_dbg(&ts->client->dev, "IC name: %.*s\n",
(int)sizeof(ts->ic_name), ts->ic_name);
/* Firmware version */
error = mip4_get_fw_version(ts);
if (error)
dev_warn(&ts->client->dev,
"Failed to retrieve FW version: %d\n", error);
else
dev_dbg(&ts->client->dev, "F/W Version: %04X %04X %04X %04X\n",
ts->fw_version.boot, ts->fw_version.core,
ts->fw_version.app, ts->fw_version.param);
/* Resolution */
cmd[0] = MIP4_R0_INFO;
cmd[1] = MIP4_R1_INFO_RESOLUTION_X;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 14);
if (error) {
dev_warn(&ts->client->dev,
"Failed to retrieve touchscreen parameters: %d\n",
error);
} else {
ts->max_x = get_unaligned_le16(&buf[0]);
ts->max_y = get_unaligned_le16(&buf[2]);
dev_dbg(&ts->client->dev, "max_x: %d, max_y: %d\n",
ts->max_x, ts->max_y);
ts->node_x = buf[4];
ts->node_y = buf[5];
ts->node_key = buf[6];
dev_dbg(&ts->client->dev,
"node_x: %d, node_y: %d, node_key: %d\n",
ts->node_x, ts->node_y, ts->node_key);
ts->ppm_x = buf[12];
ts->ppm_y = buf[13];
dev_dbg(&ts->client->dev, "ppm_x: %d, ppm_y: %d\n",
ts->ppm_x, ts->ppm_y);
/* Key ts */
if (ts->node_key > 0)
ts->key_num = ts->node_key;
}
/* Protocol */
cmd[0] = MIP4_R0_EVENT;
cmd[1] = MIP4_R1_EVENT_SUPPORTED_FUNC;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 7);
if (error) {
dev_warn(&ts->client->dev,
"Failed to retrieve device type: %d\n", error);
ts->event_format = 0xff;
} else {
ts->event_format = get_unaligned_le16(&buf[4]);
ts->event_size = buf[6];
dev_dbg(&ts->client->dev, "event_format: %d, event_size: %d\n",
ts->event_format, ts->event_size);
if (ts->event_format == 2 || ts->event_format > 3)
dev_warn(&ts->client->dev,
"Unknown event format %d\n", ts->event_format);
}
return 0;
}
static int mip4_power_on(struct mip4_ts *ts)
{
if (ts->gpio_ce) {
gpiod_set_value_cansleep(ts->gpio_ce, 1);
/* Booting delay : 200~300ms */
usleep_range(200 * 1000, 300 * 1000);
}
return 0;
}
static void mip4_power_off(struct mip4_ts *ts)
{
if (ts->gpio_ce)
gpiod_set_value_cansleep(ts->gpio_ce, 0);
}
/*
* Clear touch input event status
*/
static void mip4_clear_input(struct mip4_ts *ts)
{
int i;
/* Screen */
for (i = 0; i < MIP4_MAX_FINGERS; i++) {
input_mt_slot(ts->input, i);
input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, 0);
}
/* Keys */
for (i = 0; i < ts->key_num; i++)
input_report_key(ts->input, ts->key_code[i], 0);
input_sync(ts->input);
}
static int mip4_enable(struct mip4_ts *ts)
{
int error;
error = mip4_power_on(ts);
if (error)
return error;
enable_irq(ts->client->irq);
return 0;
}
static void mip4_disable(struct mip4_ts *ts)
{
disable_irq(ts->client->irq);
mip4_power_off(ts);
mip4_clear_input(ts);
}
/*****************************************************************
* Input handling
*****************************************************************/
static void mip4_report_keys(struct mip4_ts *ts, u8 *packet)
{
u8 key;
bool down;
switch (ts->event_format) {
case 0:
case 1:
key = packet[0] & 0x0F;
down = packet[0] & 0x80;
break;
case 3:
default:
key = packet[0] & 0x0F;
down = packet[1] & 0x01;
break;
}
/* Report key event */
if (key >= 1 && key <= ts->key_num) {
unsigned short keycode = ts->key_code[key - 1];
dev_dbg(&ts->client->dev,
"Key - ID: %d, keycode: %d, state: %d\n",
key, keycode, down);
input_event(ts->input, EV_MSC, MSC_SCAN, keycode);
input_report_key(ts->input, keycode, down);
} else {
dev_err(&ts->client->dev, "Unknown key: %d\n", key);
}
}
static void mip4_report_touch(struct mip4_ts *ts, u8 *packet)
{
int id;
bool hover;
bool palm;
bool state;
u16 x, y;
u8 pressure_stage = 0;
u8 pressure;
u8 size;
u8 touch_major;
u8 touch_minor;
switch (ts->event_format) {
case 0:
case 1:
/* Touch only */
state = packet[0] & BIT(7);
hover = packet[0] & BIT(5);
palm = packet[0] & BIT(4);
id = (packet[0] & 0x0F) - 1;
x = ((packet[1] & 0x0F) << 8) | packet[2];
y = (((packet[1] >> 4) & 0x0F) << 8) |
packet[3];
pressure = packet[4];
size = packet[5];
if (ts->event_format == 0) {
touch_major = packet[5];
touch_minor = packet[5];
} else {
touch_major = packet[6];
touch_minor = packet[7];
}
break;
case 3:
default:
/* Touch + Force(Pressure) */
id = (packet[0] & 0x0F) - 1;
hover = packet[1] & BIT(2);
palm = packet[1] & BIT(1);
state = packet[1] & BIT(0);
x = ((packet[2] & 0x0F) << 8) | packet[3];
y = (((packet[2] >> 4) & 0x0F) << 8) |
packet[4];
size = packet[6];
pressure_stage = (packet[7] & 0xF0) >> 4;
pressure = ((packet[7] & 0x0F) << 8) |
packet[8];
touch_major = packet[9];
touch_minor = packet[10];
break;
}
dev_dbg(&ts->client->dev,
"Screen - Slot: %d State: %d X: %04d Y: %04d Z: %d\n",
id, state, x, y, pressure);
if (unlikely(id < 0 || id >= MIP4_MAX_FINGERS)) {
dev_err(&ts->client->dev, "Screen - invalid slot ID: %d\n", id);
} else if (state) {
/* Press or Move event */
input_mt_slot(ts->input, id);
input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true);
input_report_abs(ts->input, ABS_MT_POSITION_X, x);
input_report_abs(ts->input, ABS_MT_POSITION_Y, y);
input_report_abs(ts->input, ABS_MT_PRESSURE, pressure);
input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, touch_major);
input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, touch_minor);
} else {
/* Release event */
input_mt_slot(ts->input, id);
input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, 0);
}
input_mt_sync_frame(ts->input);
}
static int mip4_handle_packet(struct mip4_ts *ts, u8 *packet)
{
u8 type;
switch (ts->event_format) {
case 0:
case 1:
type = (packet[0] & 0x40) >> 6;
break;
case 3:
type = (packet[0] & 0xF0) >> 4;
break;
default:
/* Should not happen unless we have corrupted firmware */
return -EINVAL;
}
dev_dbg(&ts->client->dev, "Type: %d\n", type);
/* Report input event */
switch (type) {
case MIP4_EVENT_INPUT_TYPE_KEY:
mip4_report_keys(ts, packet);
break;
case MIP4_EVENT_INPUT_TYPE_SCREEN:
mip4_report_touch(ts, packet);
break;
default:
dev_err(&ts->client->dev, "Unknown event type: %d\n", type);
break;
}
return 0;
}
static irqreturn_t mip4_interrupt(int irq, void *dev_id)
{
struct mip4_ts *ts = dev_id;
struct i2c_client *client = ts->client;
unsigned int i;
int error;
u8 cmd[2];
u8 size;
bool alert;
/* Read packet info */
cmd[0] = MIP4_R0_EVENT;
cmd[1] = MIP4_R1_EVENT_PACKET_INFO;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), ts->buf, 1);
if (error) {
dev_err(&client->dev,
"Failed to read packet info: %d\n", error);
goto out;
}
size = ts->buf[0] & 0x7F;
alert = ts->buf[0] & BIT(7);
dev_dbg(&client->dev, "packet size: %d, alert: %d\n", size, alert);
/* Check size */
if (!size) {
dev_err(&client->dev, "Empty packet\n");
goto out;
}
/* Read packet data */
cmd[0] = MIP4_R0_EVENT;
cmd[1] = MIP4_R1_EVENT_PACKET_DATA;
error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), ts->buf, size);
if (error) {
dev_err(&client->dev,
"Failed to read packet data: %d\n", error);
goto out;
}
if (alert) {
dev_dbg(&client->dev, "Alert: %d\n", ts->buf[0]);
} else {
for (i = 0; i < size; i += ts->event_size) {
error = mip4_handle_packet(ts, &ts->buf[i]);
if (error)
break;
}
input_sync(ts->input);
}
out:
return IRQ_HANDLED;
}
static int mip4_input_open(struct input_dev *dev)
{
struct mip4_ts *ts = input_get_drvdata(dev);
return mip4_enable(ts);
}
static void mip4_input_close(struct input_dev *dev)
{
struct mip4_ts *ts = input_get_drvdata(dev);
mip4_disable(ts);
}
/*****************************************************************
* Firmware update
*****************************************************************/
/* Firmware Info */
#define MIP4_BL_PAGE_SIZE 512 /* 512 */
#define MIP4_BL_PACKET_SIZE 512 /* 512, 256, 128, 64, ... */
/*
* Firmware binary tail info
*/
struct mip4_bin_tail {
u8 tail_mark[4];
u8 chip_name[4];
__le32 bin_start_addr;
__le32 bin_length;
__le16 ver_boot;
__le16 ver_core;
__le16 ver_app;
__le16 ver_param;
u8 boot_start;
u8 boot_end;
u8 core_start;
u8 core_end;
u8 app_start;
u8 app_end;
u8 param_start;
u8 param_end;
u8 checksum_type;
u8 hw_category;
__le16 param_id;
__le32 param_length;
__le32 build_date;
__le32 build_time;
__le32 reserved1;
__le32 reserved2;
__le16 reserved3;
__le16 tail_size;
__le32 crc;
} __packed;
#define MIP4_BIN_TAIL_MARK "MBT\001"
#define MIP4_BIN_TAIL_SIZE (sizeof(struct mip4_bin_tail))
/*
* Bootloader - Read status
*/
static int mip4_bl_read_status(struct mip4_ts *ts)
{
u8 cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_STATUS };
u8 result;
struct i2c_msg msg[] = {
{
.addr = ts->client->addr,
.flags = 0,
.buf = cmd,
.len = sizeof(cmd),
}, {
.addr = ts->client->addr,
.flags = I2C_M_RD,
.buf = &result,
.len = sizeof(result),
},
};
int ret;
int error;
int retry = 1000;
do {
ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to read bootloader status: %d\n",
error);
return error;
}
switch (result) {
case MIP4_BOOT_STATUS_DONE:
dev_dbg(&ts->client->dev, "%s - done\n", __func__);
return 0;
case MIP4_BOOT_STATUS_ERROR:
dev_err(&ts->client->dev, "Bootloader failure\n");
return -EIO;
case MIP4_BOOT_STATUS_BUSY:
dev_dbg(&ts->client->dev, "%s - Busy\n", __func__);
error = -EBUSY;
break;
default:
dev_err(&ts->client->dev,
"Unexpected bootloader status: %#02x\n",
result);
error = -EINVAL;
break;
}
usleep_range(1000, 2000);
} while (--retry);
return error;
}
/*
* Bootloader - Change mode
*/
static int mip4_bl_change_mode(struct mip4_ts *ts, u8 mode)
{
u8 mode_chg_cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_MODE, mode };
u8 mode_read_cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_MODE };
u8 result;
struct i2c_msg msg[] = {
{
.addr = ts->client->addr,
.flags = 0,
.buf = mode_read_cmd,
.len = sizeof(mode_read_cmd),
}, {
.addr = ts->client->addr,
.flags = I2C_M_RD,
.buf = &result,
.len = sizeof(result),
},
};
int retry = 10;
int ret;
int error;
do {
/* Send mode change command */
ret = i2c_master_send(ts->client,
mode_chg_cmd, sizeof(mode_chg_cmd));
if (ret != sizeof(mode_chg_cmd)) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send %d mode change: %d (%d)\n",
mode, error, ret);
return error;
}
dev_dbg(&ts->client->dev,
"Sent mode change request (mode: %d)\n", mode);
/* Wait */
msleep(1000);
/* Verify target mode */
ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to read device mode: %d\n", error);
return error;
}
dev_dbg(&ts->client->dev,
"Current device mode: %d, want: %d\n", result, mode);
if (result == mode)
return 0;
} while (--retry);
return -EIO;
}
/*
* Bootloader - Start bootloader mode
*/
static int mip4_bl_enter(struct mip4_ts *ts)
{
return mip4_bl_change_mode(ts, MIP4_BOOT_MODE_BOOT);
}
/*
* Bootloader - Exit bootloader mode
*/
static int mip4_bl_exit(struct mip4_ts *ts)
{
return mip4_bl_change_mode(ts, MIP4_BOOT_MODE_APP);
}
static int mip4_bl_get_address(struct mip4_ts *ts, u16 *buf_addr)
{
u8 cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_BUF_ADDR };
u8 result[sizeof(u16)];
struct i2c_msg msg[] = {
{
.addr = ts->client->addr,
.flags = 0,
.buf = cmd,
.len = sizeof(cmd),
}, {
.addr = ts->client->addr,
.flags = I2C_M_RD,
.buf = result,
.len = sizeof(result),
},
};
int ret;
int error;
ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to retrieve bootloader buffer address: %d\n",
error);
return error;
}
*buf_addr = get_unaligned_le16(result);
dev_dbg(&ts->client->dev,
"Bootloader buffer address %#04x\n", *buf_addr);
return 0;
}
static int mip4_bl_program_page(struct mip4_ts *ts, int offset,
const u8 *data, int length, u16 buf_addr)
{
u8 cmd[6];
u8 *data_buf;
u16 buf_offset;
int ret;
int error;
dev_dbg(&ts->client->dev, "Writing page @%#06x (%d)\n",
offset, length);
if (length > MIP4_BL_PAGE_SIZE || length % MIP4_BL_PACKET_SIZE) {
dev_err(&ts->client->dev,
"Invalid page length: %d\n", length);
return -EINVAL;
}
data_buf = kmalloc(2 + MIP4_BL_PACKET_SIZE, GFP_KERNEL);
if (!data_buf)
return -ENOMEM;
/* Addr */
cmd[0] = MIP4_R0_BOOT;
cmd[1] = MIP4_R1_BOOT_TARGET_ADDR;
put_unaligned_le32(offset, &cmd[2]);
ret = i2c_master_send(ts->client, cmd, 6);
if (ret != 6) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send write page address: %d\n", error);
goto out;
}
/* Size */
cmd[0] = MIP4_R0_BOOT;
cmd[1] = MIP4_R1_BOOT_SIZE;
put_unaligned_le32(length, &cmd[2]);
ret = i2c_master_send(ts->client, cmd, 6);
if (ret != 6) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send write page size: %d\n", error);
goto out;
}
/* Data */
for (buf_offset = 0;
buf_offset < length;
buf_offset += MIP4_BL_PACKET_SIZE) {
dev_dbg(&ts->client->dev,
"writing chunk at %#04x (size %d)\n",
buf_offset, MIP4_BL_PACKET_SIZE);
put_unaligned_be16(buf_addr + buf_offset, data_buf);
memcpy(&data_buf[2], &data[buf_offset], MIP4_BL_PACKET_SIZE);
ret = i2c_master_send(ts->client,
data_buf, 2 + MIP4_BL_PACKET_SIZE);
if (ret != 2 + MIP4_BL_PACKET_SIZE) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to read chunk at %#04x (size %d): %d\n",
buf_offset, MIP4_BL_PACKET_SIZE, error);
goto out;
}
}
/* Command */
cmd[0] = MIP4_R0_BOOT;
cmd[1] = MIP4_R1_BOOT_CMD;
cmd[2] = MIP4_BOOT_CMD_PROGRAM;
ret = i2c_master_send(ts->client, cmd, 3);
if (ret != 3) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send 'write' command: %d\n", error);
goto out;
}
/* Status */
error = mip4_bl_read_status(ts);
out:
kfree(data_buf);
return error ? error : 0;
}
static int mip4_bl_verify_page(struct mip4_ts *ts, int offset,
const u8 *data, int length, int buf_addr)
{
u8 cmd[8];
u8 *read_buf;
int buf_offset;
struct i2c_msg msg[] = {
{
.addr = ts->client->addr,
.flags = 0,
.buf = cmd,
.len = 2,
}, {
.addr = ts->client->addr,
.flags = I2C_M_RD,
.len = MIP4_BL_PACKET_SIZE,
},
};
int ret;
int error;
dev_dbg(&ts->client->dev, "Validating page @%#06x (%d)\n",
offset, length);
/* Addr */
cmd[0] = MIP4_R0_BOOT;
cmd[1] = MIP4_R1_BOOT_TARGET_ADDR;
put_unaligned_le32(offset, &cmd[2]);
ret = i2c_master_send(ts->client, cmd, 6);
if (ret != 6) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send read page address: %d\n", error);
return error;
}
/* Size */
cmd[0] = MIP4_R0_BOOT;
cmd[1] = MIP4_R1_BOOT_SIZE;
put_unaligned_le32(length, &cmd[2]);
ret = i2c_master_send(ts->client, cmd, 6);
if (ret != 6) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send read page size: %d\n", error);
return error;
}
/* Command */
cmd[0] = MIP4_R0_BOOT;
cmd[1] = MIP4_R1_BOOT_CMD;
cmd[2] = MIP4_BOOT_CMD_READ;
ret = i2c_master_send(ts->client, cmd, 3);
if (ret != 3) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to send 'read' command: %d\n", error);
return error;
}
/* Status */
error = mip4_bl_read_status(ts);
if (error)
return error;
/* Read */
msg[1].buf = read_buf = kmalloc(MIP4_BL_PACKET_SIZE, GFP_KERNEL);
if (!read_buf)
return -ENOMEM;
for (buf_offset = 0;
buf_offset < length;
buf_offset += MIP4_BL_PACKET_SIZE) {
dev_dbg(&ts->client->dev,
"reading chunk at %#04x (size %d)\n",
buf_offset, MIP4_BL_PACKET_SIZE);
put_unaligned_be16(buf_addr + buf_offset, cmd);
ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
error = ret < 0 ? ret : -EIO;
dev_err(&ts->client->dev,
"Failed to read chunk at %#04x (size %d): %d\n",
buf_offset, MIP4_BL_PACKET_SIZE, error);
break;
}
if (memcmp(&data[buf_offset], read_buf, MIP4_BL_PACKET_SIZE)) {
dev_err(&ts->client->dev,
"Failed to validate chunk at %#04x (size %d)\n",
buf_offset, MIP4_BL_PACKET_SIZE);
#if MIP4_FW_UPDATE_DEBUG
print_hex_dump(KERN_DEBUG,
MIP4_DEVICE_NAME " F/W File: ",
DUMP_PREFIX_OFFSET, 16, 1,
data + offset, MIP4_BL_PACKET_SIZE,
false);
print_hex_dump(KERN_DEBUG,
MIP4_DEVICE_NAME " F/W Chip: ",
DUMP_PREFIX_OFFSET, 16, 1,
read_buf, MIP4_BL_PAGE_SIZE, false);
#endif
error = -EINVAL;
break;
}
}
kfree(read_buf);
return error ? error : 0;
}
/*
* Flash chip firmware
*/
static int mip4_flash_fw(struct mip4_ts *ts,
const u8 *fw_data, u32 fw_size, u32 fw_offset)
{
struct i2c_client *client = ts->client;
int offset;
u16 buf_addr;
int error, error2;
/* Enter bootloader mode */
dev_dbg(&client->dev, "Entering bootloader mode\n");
error = mip4_bl_enter(ts);
if (error) {
dev_err(&client->dev,
"Failed to enter bootloader mode: %d\n",
error);
return error;
}
/* Read info */
error = mip4_bl_get_address(ts, &buf_addr);
if (error)
goto exit_bl;
/* Program & Verify */
dev_dbg(&client->dev,
"Program & Verify, page size: %d, packet size: %d\n",
MIP4_BL_PAGE_SIZE, MIP4_BL_PACKET_SIZE);
for (offset = fw_offset;
offset < fw_offset + fw_size;
offset += MIP4_BL_PAGE_SIZE) {
/* Program */
error = mip4_bl_program_page(ts, offset, fw_data + offset,
MIP4_BL_PAGE_SIZE, buf_addr);
if (error)
break;
/* Verify */
error = mip4_bl_verify_page(ts, offset, fw_data + offset,
MIP4_BL_PAGE_SIZE, buf_addr);
if (error)
break;
}
exit_bl:
/* Exit bootloader mode */
dev_dbg(&client->dev, "Exiting bootloader mode\n");
error2 = mip4_bl_exit(ts);
if (error2) {
dev_err(&client->dev,
"Failed to exit bootloader mode: %d\n", error2);
if (!error)
error = error2;
}
/* Reset chip */
mip4_power_off(ts);
mip4_power_on(ts);
mip4_query_device(ts);
/* Refresh device parameters */
input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0);
input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0);
input_set_abs_params(ts->input, ABS_X, 0, ts->max_x, 0, 0);
input_set_abs_params(ts->input, ABS_Y, 0, ts->max_y, 0, 0);
input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->ppm_x);
input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->ppm_y);
input_abs_set_res(ts->input, ABS_X, ts->ppm_x);
input_abs_set_res(ts->input, ABS_Y, ts->ppm_y);
return error ? error : 0;
}
static int mip4_parse_firmware(struct mip4_ts *ts, const struct firmware *fw,
u32 *fw_offset_start, u32 *fw_size,
const struct mip4_bin_tail **pfw_info)
{
const struct mip4_bin_tail *fw_info;
struct mip4_fw_version fw_version;
u16 tail_size;
if (fw->size < MIP4_BIN_TAIL_SIZE) {
dev_err(&ts->client->dev,
"Invalid firmware, size mismatch (tail %zd vs %zd)\n",
MIP4_BIN_TAIL_SIZE, fw->size);
return -EINVAL;
}
fw_info = (const void *)&fw->data[fw->size - MIP4_BIN_TAIL_SIZE];
#if MIP4_FW_UPDATE_DEBUG
print_hex_dump(KERN_ERR, MIP4_DEVICE_NAME " Bin Info: ",
DUMP_PREFIX_OFFSET, 16, 1, *fw_info, tail_size, false);
#endif
tail_size = get_unaligned_le16(&fw_info->tail_size);
if (tail_size != MIP4_BIN_TAIL_SIZE) {
dev_err(&ts->client->dev,
"wrong tail size: %d (expected %zd)\n",
tail_size, MIP4_BIN_TAIL_SIZE);
return -EINVAL;
}
/* Check bin format */
if (memcmp(fw_info->tail_mark, MIP4_BIN_TAIL_MARK,
sizeof(fw_info->tail_mark))) {
dev_err(&ts->client->dev,
"unable to locate tail marker (%*ph vs %*ph)\n",
(int)sizeof(fw_info->tail_mark), fw_info->tail_mark,
(int)sizeof(fw_info->tail_mark), MIP4_BIN_TAIL_MARK);
return -EINVAL;
}
*fw_offset_start = get_unaligned_le32(&fw_info->bin_start_addr);
*fw_size = get_unaligned_le32(&fw_info->bin_length);
dev_dbg(&ts->client->dev,
"F/W Data offset: %#08x, size: %d\n",
*fw_offset_start, *fw_size);
if (*fw_size % MIP4_BL_PAGE_SIZE) {
dev_err(&ts->client->dev,
"encoded fw length %d is not multiple of pages (%d)\n",
*fw_size, MIP4_BL_PAGE_SIZE);
return -EINVAL;
}
if (fw->size != *fw_offset_start + *fw_size) {
dev_err(&ts->client->dev,
"Wrong firmware size, expected %d bytes, got %zd\n",
*fw_offset_start + *fw_size, fw->size);
return -EINVAL;
}
mip4_parse_fw_version((const u8 *)&fw_info->ver_boot, &fw_version);
dev_dbg(&ts->client->dev,
"F/W file version %04X %04X %04X %04X\n",
fw_version.boot, fw_version.core,
fw_version.app, fw_version.param);
dev_dbg(&ts->client->dev, "F/W chip version: %04X %04X %04X %04X\n",
ts->fw_version.boot, ts->fw_version.core,
ts->fw_version.app, ts->fw_version.param);
/* Check F/W type */
if (fw_version.boot != 0xEEEE && fw_version.boot != 0xFFFF &&
fw_version.core == 0xEEEE &&
fw_version.app == 0xEEEE &&
fw_version.param == 0xEEEE) {
dev_dbg(&ts->client->dev, "F/W type: Bootloader\n");
} else if (fw_version.boot == 0xEEEE &&
fw_version.core != 0xEEEE && fw_version.core != 0xFFFF &&
fw_version.app != 0xEEEE && fw_version.app != 0xFFFF &&
fw_version.param != 0xEEEE && fw_version.param != 0xFFFF) {
dev_dbg(&ts->client->dev, "F/W type: Main\n");
} else {
dev_err(&ts->client->dev, "Wrong firmware type\n");
return -EINVAL;
}
return 0;
}
static int mip4_execute_fw_update(struct mip4_ts *ts, const struct firmware *fw)
{
const struct mip4_bin_tail *fw_info;
u32 fw_start_offset;
u32 fw_size;
int retires = 3;
int error;
error = mip4_parse_firmware(ts, fw,
&fw_start_offset, &fw_size, &fw_info);
if (error)
return error;
if (ts->input->users) {
disable_irq(ts->client->irq);
} else {
error = mip4_power_on(ts);
if (error)
return error;
}
/* Update firmware */
do {
error = mip4_flash_fw(ts, fw->data, fw_size, fw_start_offset);
if (!error)
break;
} while (--retires);
if (error)
dev_err(&ts->client->dev,
"Failed to flash firmware: %d\n", error);
/* Enable IRQ */
if (ts->input->users)
enable_irq(ts->client->irq);
else
mip4_power_off(ts);
return error ? error : 0;
}
static ssize_t mip4_sysfs_fw_update(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
const struct firmware *fw;
int error;
error = request_firmware(&fw, ts->fw_name, dev);
if (error) {
dev_err(&ts->client->dev,
"Failed to retrieve firmware %s: %d\n",
ts->fw_name, error);
return error;
}
/*
* Take input mutex to prevent racing with itself and also with
* userspace opening and closing the device and also suspend/resume
* transitions.
*/
mutex_lock(&ts->input->mutex);
error = mip4_execute_fw_update(ts, fw);
mutex_unlock(&ts->input->mutex);
release_firmware(fw);
if (error) {
dev_err(&ts->client->dev,
"Firmware update failed: %d\n", error);
return error;
}
return count;
}
static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mip4_sysfs_fw_update);
static ssize_t mip4_sysfs_read_fw_version(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
size_t count;
/* Take lock to prevent racing with firmware update */
mutex_lock(&ts->input->mutex);
count = snprintf(buf, PAGE_SIZE, "%04X %04X %04X %04X\n",
ts->fw_version.boot, ts->fw_version.core,
ts->fw_version.app, ts->fw_version.param);
mutex_unlock(&ts->input->mutex);
return count;
}
static DEVICE_ATTR(fw_version, S_IRUGO, mip4_sysfs_read_fw_version, NULL);
static ssize_t mip4_sysfs_read_hw_version(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
size_t count;
/* Take lock to prevent racing with firmware update */
mutex_lock(&ts->input->mutex);
/*
* product_name shows the name or version of the hardware
* paired with current firmware in the chip.
*/
count = snprintf(buf, PAGE_SIZE, "%.*s\n",
(int)sizeof(ts->product_name), ts->product_name);
mutex_unlock(&ts->input->mutex);
return count;
}
static DEVICE_ATTR(hw_version, S_IRUGO, mip4_sysfs_read_hw_version, NULL);
static ssize_t mip4_sysfs_read_product_id(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
size_t count;
mutex_lock(&ts->input->mutex);
count = snprintf(buf, PAGE_SIZE, "%04X\n", ts->product_id);
mutex_unlock(&ts->input->mutex);
return count;
}
static DEVICE_ATTR(product_id, S_IRUGO, mip4_sysfs_read_product_id, NULL);
static ssize_t mip4_sysfs_read_ic_name(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
size_t count;
mutex_lock(&ts->input->mutex);
count = snprintf(buf, PAGE_SIZE, "%.*s\n",
(int)sizeof(ts->ic_name), ts->ic_name);
mutex_unlock(&ts->input->mutex);
return count;
}
static DEVICE_ATTR(ic_name, S_IRUGO, mip4_sysfs_read_ic_name, NULL);
static struct attribute *mip4_attrs[] = {
&dev_attr_fw_version.attr,
&dev_attr_hw_version.attr,
&dev_attr_product_id.attr,
&dev_attr_ic_name.attr,
&dev_attr_update_fw.attr,
NULL,
};
static const struct attribute_group mip4_attr_group = {
.attrs = mip4_attrs,
};
static int mip4_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct mip4_ts *ts;
struct input_dev *input;
int error;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "Not supported I2C adapter\n");
return -ENXIO;
}
ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
input = devm_input_allocate_device(&client->dev);
if (!input)
return -ENOMEM;
ts->client = client;
ts->input = input;
snprintf(ts->phys, sizeof(ts->phys),
"%s/input0", dev_name(&client->dev));
ts->gpio_ce = devm_gpiod_get_optional(&client->dev,
"ce", GPIOD_OUT_LOW);
if (IS_ERR(ts->gpio_ce)) {
error = PTR_ERR(ts->gpio_ce);
if (error != EPROBE_DEFER)
dev_err(&client->dev,
"Failed to get gpio: %d\n", error);
return error;
}
error = mip4_power_on(ts);
if (error)
return error;
error = mip4_query_device(ts);
mip4_power_off(ts);
if (error)
return error;
input->name = "MELFAS MIP4 Touchscreen";
input->phys = ts->phys;
input->id.bustype = BUS_I2C;
input->id.vendor = 0x13c5;
input->id.product = ts->product_id;
input->open = mip4_input_open;
input->close = mip4_input_close;
input_set_drvdata(input, ts);
input->keycode = ts->key_code;
input->keycodesize = sizeof(*ts->key_code);
input->keycodemax = ts->key_num;
input_set_abs_params(input, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0);
input_set_abs_params(input, ABS_MT_PRESSURE,
MIP4_PRESSURE_MIN, MIP4_PRESSURE_MAX, 0, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MAJOR,
MIP4_TOUCH_MAJOR_MIN, MIP4_TOUCH_MAJOR_MAX, 0, 0);
input_set_abs_params(input, ABS_MT_TOUCH_MINOR,
MIP4_TOUCH_MINOR_MIN, MIP4_TOUCH_MINOR_MAX, 0, 0);
input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->ppm_x);
input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->ppm_y);
error = input_mt_init_slots(input, MIP4_MAX_FINGERS, INPUT_MT_DIRECT);
if (error)
return error;
i2c_set_clientdata(client, ts);
error = devm_request_threaded_irq(&client->dev, client->irq,
NULL, mip4_interrupt,
IRQF_ONESHOT, MIP4_DEVICE_NAME, ts);
if (error) {
dev_err(&client->dev,
"Failed to request interrupt %d: %d\n",
client->irq, error);
return error;
}
disable_irq(client->irq);
error = input_register_device(input);
if (error) {
dev_err(&client->dev,
"Failed to register input device: %d\n", error);
return error;
}
error = devm_device_add_group(&client->dev, &mip4_attr_group);
if (error) {
dev_err(&client->dev,
"Failed to create sysfs attribute group: %d\n", error);
return error;
}
return 0;
}
static int __maybe_unused mip4_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
struct input_dev *input = ts->input;
mutex_lock(&input->mutex);
if (device_may_wakeup(dev))
ts->wake_irq_enabled = enable_irq_wake(client->irq) == 0;
else if (input->users)
mip4_disable(ts);
mutex_unlock(&input->mutex);
return 0;
}
static int __maybe_unused mip4_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
struct input_dev *input = ts->input;
mutex_lock(&input->mutex);
if (ts->wake_irq_enabled)
disable_irq_wake(client->irq);
else if (input->users)
mip4_enable(ts);
mutex_unlock(&input->mutex);
return 0;
}
static SIMPLE_DEV_PM_OPS(mip4_pm_ops, mip4_suspend, mip4_resume);
#ifdef CONFIG_OF
static const struct of_device_id mip4_of_match[] = {
{ .compatible = "melfas,"MIP4_DEVICE_NAME, },
{ },
};
MODULE_DEVICE_TABLE(of, mip4_of_match);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id mip4_acpi_match[] = {
{ "MLFS0000", 0},
{ },
};
MODULE_DEVICE_TABLE(acpi, mip4_acpi_match);
#endif
static const struct i2c_device_id mip4_i2c_ids[] = {
{ MIP4_DEVICE_NAME, 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, mip4_i2c_ids);
static struct i2c_driver mip4_driver = {
.id_table = mip4_i2c_ids,
.probe = mip4_probe,
.driver = {
.name = MIP4_DEVICE_NAME,
.of_match_table = of_match_ptr(mip4_of_match),
.acpi_match_table = ACPI_PTR(mip4_acpi_match),
.pm = &mip4_pm_ops,
},
};
module_i2c_driver(mip4_driver);
MODULE_DESCRIPTION("MELFAS MIP4 Touchscreen");
MODULE_AUTHOR("Sangwon Jee <jeesw@melfas.com>");
MODULE_LICENSE("GPL");
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