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nest-open-source / manifest_repos / kernel / 4f18c0c0649c21299b096883d4328736d60f04cc / . / drivers / input / touchscreen / goodix_touch_gtx8 / goodix_ts_i2c.c
blob: 9ca830d1ae255facccccfff4f163fa61623e56f4 [file] [log] [blame]
/*
* Goodix I2C Module
* Hardware interface layer of touchdriver architecture.
*
* Copyright (C) 2019 - 2020 Goodix, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be a reference
* to you, when you are integrating the GOODiX's CTP IC into your system,
* 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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include "goodix_ts_core.h"
#include "goodix_cfg_bin.h"
#define TS_DT_COMPATIBLE "goodix,gt9889"
#define TS_DRIVER_NAME "gtx8"
#define I2C_MAX_TRANSFER_SIZE 256
#define TS_ADDR_LENGTH 2
#define TS_DOZE_ENABLE_RETRY_TIMES 3
#define TS_DOZE_DISABLE_RETRY_TIMES 9
#define TS_WAIT_CFG_READY_RETRY_TIMES 30
#define TS_WAIT_CMD_FREE_RETRY_TIMES 10
#define TS_REG_COORDS_BASE 0x824E
#define TS_REG_CMD 0x8040
#define TS_REG_REQUEST 0x8044
#define TS_REG_VERSION 0x8240
#define TS_REG_CFG_BASE 0x8050
#define TS_REG_DOZE_CTRL 0x30F0
#define TS_REG_DOZE_STAT 0x3100
#define TS_REG_ESD_TICK_R 0x3103
#define CFG_XMAX_OFFSET (0x8052 - 0x8050)
#define CFG_YMAX_OFFSET (0x8054 - 0x8050)
#define REQUEST_HANDLED 0x00
#define REQUEST_CONFIG 0x01
#define REQUEST_BAKREF 0x02
#define REQUEST_RESET 0x03
#define REQUEST_RELOADFW 0x05
#define REQUEST_IDLE 0xff
#define COMMAND_SLEEP 0x05
#define COMMAND_CLOSE_HID 0xaa
#define COMMAND_START_SEND_CFG 0x80
#define COMMAND_END_SEND_CFG 0x83
#define COMMAND_SEND_SMALL_CFG 0x81
#define COMMAND_SEND_CFG_PREPARE_OK 0x82
#define COMMAND_START_READ_CFG 0x86
#define COMMAND_READ_CFG_PREPARE_OK 0x85
#define BYTES_PER_COORD 8
#define TS_MAX_SENSORID 5
#define TS_CFG_HEAD_LEN 4
#define TS_CFG_BAG_NUM_INDEX 2
#define TS_CFG_BAG_START_INDEX 4
#define TS_DOZE_DISABLE_DATA 0xAA
#define TS_DOZE_CLOSE_OK_DATA 0xBB
#define TS_DOZE_ENABLE_DATA 0xCC
#define TS_CMD_REG_READY 0xFF
int goodix_ts_core_init(void);
#ifdef CONFIG_OF
/**
* goodix_parse_dt_resolution - parse resolution from dt
* @node: devicetree node
* @board_data: pointer to board data structure
* return: 0 - no error, <0 error
*/
static int goodix_parse_dt_resolution(struct device_node *node,
struct goodix_ts_board_data *board_data)
{
int r, err;
r = of_property_read_u32(node, "goodix,panel-max-x",
&board_data->panel_max_x);
if (r)
err = -ENOENT;
r = of_property_read_u32(node, "goodix,panel-max-y",
&board_data->panel_max_y);
if (r)
err = -ENOENT;
r = of_property_read_u32(node, "goodix,panel-max-w",
&board_data->panel_max_w);
if (r)
err = -ENOENT;
board_data->swap_axis = of_property_read_bool(node,
"goodix,swap-axis");
board_data->x2x = of_property_read_bool(node, "goodix,x2x");
board_data->y2y = of_property_read_bool(node, "goodix,y2y");
return 0;
}
/**
* goodix_parse_dt - parse board data from dt
* @dev: pointer to device
* @board_data: pointer to board data structure
* return: 0 - no error, <0 error
*/
static int goodix_parse_dt(struct device_node *node,
struct goodix_ts_board_data *board_data)
{
struct property *prop;
const char *name_tmp;
int r;
if (!board_data) {
ts_err("invalid board data");
return -EINVAL;
}
r = of_get_named_gpio(node, "goodix,reset-gpio", 0);
if (r < 0) {
ts_err("invalid reset-gpio in dt: %d", r);
return -EINVAL;
}
ts_info("get reset-gpio[%d] from dt", r);
board_data->reset_gpio = r;
r = of_get_named_gpio(node, "goodix,irq-gpio", 0);
if (r < 0) {
ts_err("invalid irq-gpio in dt: %d", r);
return -EINVAL;
}
ts_info("get irq-gpio[%d] from dt", r);
board_data->irq_gpio = r;
r = of_property_read_u32(node, "goodix,irq-flags",
&board_data->irq_flags);
if (r) {
ts_err("invalid irq-flags");
return -EINVAL;
}
memset(board_data->avdd_name, 0, sizeof(board_data->avdd_name));
r = of_property_read_string(node, "goodix,avdd-name", &name_tmp);
if (!r) {
ts_info("avdd name form dt: %s", name_tmp);
if (strlen(name_tmp) < sizeof(board_data->avdd_name))
strncpy(board_data->avdd_name,
name_tmp, sizeof(board_data->avdd_name));
else
ts_info("invalied avdd name length: %ld > %ld",
strlen(name_tmp),
sizeof(board_data->avdd_name));
}
r = of_property_read_u32(node, "goodix,power-on-delay-us",
&board_data->power_on_delay_us);
if (!r) {
/* 1000ms is too large, maybe you have pass a wrong value */
if (board_data->power_on_delay_us > 1000 * 1000) {
ts_err("Power on delay time exceed 1s, please check");
board_data->power_on_delay_us = 0;
}
}
r = of_property_read_u32(node, "goodix,power-off-delay-us",
&board_data->power_off_delay_us);
if (!r) {
/* 1000ms is too large, maybe you have pass */
if (board_data->power_off_delay_us > 1000 * 1000) {
ts_err("Power off delay time exceed 1s, please check");
board_data->power_off_delay_us = 0;
}
}
/* get xyz resolutions */
r = goodix_parse_dt_resolution(node, board_data);
if (r < 0) {
ts_err("Failed to parse resolutions:%d", r);
return r;
}
/* key map */
prop = of_find_property(node, "goodix,panel-key-map", NULL);
if (prop && prop->length) {
if (prop->length / sizeof(u32) > GOODIX_MAX_TP_KEY) {
ts_err("Size of panel-key-map is invalid");
return r;
}
board_data->panel_max_key = prop->length / sizeof(u32);
board_data->tp_key_num = prop->length / sizeof(u32);
r = of_property_read_u32_array(node,
"goodix,panel-key-map",
&board_data->panel_key_map[0],
board_data->panel_max_key);
if (r) {
ts_err("failed get key map, %d", r);
return r;
}
}
/*get pen-enable switch and pen keys, must after "key map"*/
board_data->pen_enable = of_property_read_bool(node,
"goodix,pen-enable");
if (board_data->pen_enable)
ts_info("goodix pen enabled");
ts_info("***key:%d, %d, %d, %d",
board_data->panel_key_map[0], board_data->panel_key_map[1],
board_data->panel_key_map[2], board_data->panel_key_map[3]);
ts_debug("[DT]x:%d, y:%d, w:%d, p:%d", board_data->panel_max_x,
board_data->panel_max_y, board_data->panel_max_w,
board_data->panel_max_p);
return 0;
}
#endif
int goodix_i2c_test(struct goodix_ts_device *dev)
{
#define TEST_ADDR 0x4100
#define TEST_LEN 1
struct i2c_client *client = to_i2c_client(dev->dev);
unsigned char test_buf[TEST_LEN + 1], addr_buf[2];
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = !I2C_M_RD,
.buf = &addr_buf[0],
.len = TS_ADDR_LENGTH,
}, {
.addr = client->addr,
.flags = I2C_M_RD,
.buf = &test_buf[0],
.len = TEST_LEN,
}
};
msgs[0].buf[0] = (TEST_ADDR >> 8) & 0xFF;
msgs[0].buf[1] = TEST_ADDR & 0xFF;
if (likely(i2c_transfer(client->adapter, msgs, 2) == 2))
return 0;
/* test failed */
return -EINVAL;
}
/* confirm current device is goodix or not.
* If confirmed 0 will return.
*/
int goodix_ts_dev_confirm(struct goodix_ts_device *ts_dev)
{
#define DEV_CONFIRM_RETRY 3
int retry;
for (retry = 0; retry < DEV_CONFIRM_RETRY; retry++) {
gpio_direction_output(ts_dev->board_data.reset_gpio, 0);
udelay(2000);
gpio_direction_output(ts_dev->board_data.reset_gpio, 1);
mdelay(5);
if (!goodix_i2c_test(ts_dev)) {
msleep(95);
return 0;
}
}
return -EINVAL;
}
/**
* goodix_i2c_read_trans - read device register through i2c bus
* @dev: pointer to device data
* @addr: register address
* @data: read buffer
* @len: bytes to read
* return: 0 - read ok, < 0 - i2c transter error
*/
int goodix_i2c_read_trans(struct goodix_ts_device *dev, unsigned int reg,
unsigned char *data, unsigned int len)
{
struct i2c_client *client = to_i2c_client(dev->dev);
unsigned int transfer_length = 0;
unsigned int pos = 0, address = reg;
unsigned char get_buf[64], addr_buf[2];
int retry, r = 0;
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = !I2C_M_RD,
.buf = &addr_buf[0],
.len = TS_ADDR_LENGTH,
}, {
.addr = client->addr,
.flags = I2C_M_RD,
}
};
if (likely(len < sizeof(get_buf))) {
/* code optimize, use stack memory */
msgs[1].buf = &get_buf[0];
} else {
msgs[1].buf = kzalloc(I2C_MAX_TRANSFER_SIZE < len
? I2C_MAX_TRANSFER_SIZE : len, GFP_KERNEL);
if (msgs[1].buf == NULL)
return -ENOMEM;
}
while (pos != len) {
if (unlikely(len - pos > I2C_MAX_TRANSFER_SIZE))
transfer_length = I2C_MAX_TRANSFER_SIZE;
else
transfer_length = len - pos;
msgs[0].buf[0] = (address >> 8) & 0xFF;
msgs[0].buf[1] = address & 0xFF;
msgs[1].len = transfer_length;
for (retry = 0; retry < GOODIX_BUS_RETRY_TIMES; retry++) {
if (likely(i2c_transfer(client->adapter,
msgs, 2) == 2)) {
memcpy(&data[pos], msgs[1].buf,
transfer_length);
pos += transfer_length;
address += transfer_length;
break;
}
ts_info("I2c read retry[%d]:0x%x", retry + 1, reg);
msleep(20);
}
if (unlikely(retry == GOODIX_BUS_RETRY_TIMES)) {
ts_err("I2c read failed,dev:%02x,reg:%04x,size:%u",
client->addr, reg, len);
r = -EBUS;
goto read_exit;
}
}
read_exit:
if (unlikely(len >= sizeof(get_buf)))
kfree(msgs[1].buf);
return r;
}
/**
* goodix_i2c_write_trans - write device register through i2c bus
* @dev: pointer to device data
* @addr: register address
* @data: write buffer
* @len: bytes to write
* return: 0 - write ok; < 0 - i2c transter error.
*/
int goodix_i2c_write_trans(struct goodix_ts_device *dev, unsigned int reg,
unsigned char *data, unsigned int len)
{
struct i2c_client *client = to_i2c_client(dev->dev);
unsigned int pos = 0, transfer_length = 0;
unsigned int address = reg;
unsigned char put_buf[64];
int retry, r = 0;
struct i2c_msg msg = {
.addr = client->addr,
.flags = !I2C_M_RD,
};
if (likely(len + TS_ADDR_LENGTH < sizeof(put_buf))) {
/* code optimize,use stack memory*/
msg.buf = &put_buf[0];
} else {
msg.buf = kmalloc(I2C_MAX_TRANSFER_SIZE < len + TS_ADDR_LENGTH
? I2C_MAX_TRANSFER_SIZE : len + TS_ADDR_LENGTH,
GFP_KERNEL);
if (msg.buf == NULL)
return -ENOMEM;
}
while (pos != len) {
if (unlikely(len - pos > I2C_MAX_TRANSFER_SIZE - TS_ADDR_LENGTH))
transfer_length = I2C_MAX_TRANSFER_SIZE - TS_ADDR_LENGTH;
else
transfer_length = len - pos;
msg.buf[0] = (unsigned char)((address >> 8) & 0xFF);
msg.buf[1] = (unsigned char)(address & 0xFF);
msg.len = transfer_length + 2;
memcpy(&msg.buf[2], &data[pos], transfer_length);
for (retry = 0; retry < GOODIX_BUS_RETRY_TIMES; retry++) {
if (likely(i2c_transfer(client->adapter,
&msg, 1) == 1)) {
pos += transfer_length;
address += transfer_length;
break;
}
ts_debug("I2c write retry[%d]", retry + 1);
msleep(20);
}
if (unlikely(retry == GOODIX_BUS_RETRY_TIMES)) {
ts_err("I2c write failed,dev:%02x,reg:%04x,size:%u",
client->addr, reg, len);
r = -EBUS;
goto write_exit;
}
}
write_exit:
if (likely(len + TS_ADDR_LENGTH >= sizeof(put_buf)))
kfree(msg.buf);
return r;
}
/**
* goodix_set_i2c_doze_mode - disable or enable doze mode
* @dev: pointer to device data
* @enable: true/flase
* return: 0 - ok; < 0 - error.
* This func must be used in pairs, when you disable doze
* mode, then you must enable it again.
* Between set_doze_false and set_doze_true, do not reset
* IC!
*/
static int goodix_set_i2c_doze_mode(struct goodix_ts_device *dev, int enable)
{
static DEFINE_MUTEX(doze_mode_lock);
static int doze_mode_set_count;
int result = -EINVAL;
int i;
u8 w_data, r_data;
if (dev->ic_type != IC_TYPE_NORMANDY)
return 0;
mutex_lock(&doze_mode_lock);
if (enable) {
if (doze_mode_set_count != 0)
doze_mode_set_count--;
/*when count equal 0, allow ic enter doze mode*/
if (doze_mode_set_count == 0) {
w_data = TS_DOZE_ENABLE_DATA;
for (i = 0; i < TS_DOZE_ENABLE_RETRY_TIMES; i++) {
result = goodix_i2c_write_trans(dev,
TS_REG_DOZE_CTRL, &w_data, 1);
if (!result) {
result = 0;
goto exit;
}
usleep_range(1000, 1100);
}
if (i >= TS_DOZE_ENABLE_RETRY_TIMES)
ts_err("i2c doze mode enable failed");
} else {
/*ts_info("doze count not euqal 0,
* so skip doze mode enable");
*/
result = 0;
goto exit;
}
} else {
doze_mode_set_count++;
if (doze_mode_set_count == 1) {
w_data = TS_DOZE_DISABLE_DATA;
goodix_i2c_write_trans(dev, TS_REG_DOZE_CTRL,
&w_data, 1);
usleep_range(1000, 1100);
for (i = 0; i < TS_DOZE_DISABLE_RETRY_TIMES; i++) {
goodix_i2c_read_trans(dev,
TS_REG_DOZE_STAT, &r_data, 1);
if (TS_DOZE_CLOSE_OK_DATA == r_data) {
result = 0;
goto exit;
} else if (0xAA != r_data) {
w_data = TS_DOZE_DISABLE_DATA;
goodix_i2c_write_trans(dev,
TS_REG_DOZE_CTRL, &w_data, 1);
}
usleep_range(10000, 10100);
}
ts_err("doze mode disable FAILED");
} else {
result = 0;
goto exit;
}
}
exit:
mutex_unlock(&doze_mode_lock);
return result;
}
/**
* goodix_i2c_write - write device register through i2c bus
* @dev: pointer to device data
* @addr: register address
* @data: write buffer
* @len: bytes to write
* return: 0 - write ok; < 0 - i2c transter error.
*/
int goodix_i2c_write(struct goodix_ts_device *dev, unsigned int reg,
unsigned char *data, unsigned int len)
{
int r = -EINVAL;
if (goodix_set_i2c_doze_mode(dev, false)) {
ts_err(" faild disable doze, i2c write:0x%04x", reg);
goto exit;
}
r = goodix_i2c_write_trans(dev, reg, data, len);
exit:
if (goodix_set_i2c_doze_mode(dev, true))
ts_err("failed enable doze write:0x%04x", reg);
return r;
}
/**
* goodix_i2c_read - read device register through i2c bus
* @dev: pointer to device data
* @addr: register address
* @data: read buffer
* @len: bytes to read
* return: 0 - read ok, < 0 - i2c transter error
*/
int goodix_i2c_read(struct goodix_ts_device *dev, unsigned int reg,
unsigned char *data, unsigned int len)
{
int r = -EINVAL;
if (goodix_set_i2c_doze_mode(dev, false)) {
ts_err("failed disable doze:0x%04x", reg);
goto exit;
}
r = goodix_i2c_read_trans(dev, reg, data, len);
exit:
if (goodix_set_i2c_doze_mode(dev, true))
ts_err("failed enable doze :0x%04x", reg);
return r;
}
/**
* goodix_i2c_write_trans_once
* write device register through i2c bus, no retry
* @dev: pointer to device data
* @addr: register address
* @data: write buffer
* @len: bytes to write
* return: 0 - write ok; < 0 - i2c transter error.
*/
int goodix_i2c_write_trans_once(struct goodix_ts_device *dev, unsigned int reg,
unsigned char *data, unsigned int len)
{
struct i2c_client *client = to_i2c_client(dev->dev);
unsigned int pos = 0, transfer_length = 0;
unsigned int address = reg;
unsigned char put_buf[64];
struct i2c_msg msg = {
.addr = client->addr,
.flags = !I2C_M_RD,
};
if (likely(len + TS_ADDR_LENGTH < sizeof(put_buf))) {
/* code optimize,use stack memory*/
msg.buf = &put_buf[0];
} else {
msg.buf = kmalloc(I2C_MAX_TRANSFER_SIZE < len + TS_ADDR_LENGTH
? I2C_MAX_TRANSFER_SIZE : len + TS_ADDR_LENGTH,
GFP_KERNEL);
if (msg.buf == NULL) {
ts_err("Malloc failed");
return -ENOMEM;
}
}
while (pos != len) {
if (unlikely(len - pos > I2C_MAX_TRANSFER_SIZE - TS_ADDR_LENGTH))
transfer_length = I2C_MAX_TRANSFER_SIZE - TS_ADDR_LENGTH;
else
transfer_length = len - pos;
msg.buf[0] = (unsigned char)((address >> 8) & 0xFF);
msg.buf[1] = (unsigned char)(address & 0xFF);
msg.len = transfer_length + 2;
memcpy(&msg.buf[2], &data[pos], transfer_length);
i2c_transfer(client->adapter, &msg, 1);
pos += transfer_length;
address += transfer_length;
}
if (likely(len + TS_ADDR_LENGTH >= sizeof(put_buf)))
kfree(msg.buf);
return 0;
}
static void goodix_cmds_init(struct goodix_ts_cmd *ts_cmd,
u8 cmds, u8 cmd_data, u32 reg_addr)
{
if (reg_addr) {
ts_cmd->cmd_reg = reg_addr;
ts_cmd->length = 3;
ts_cmd->cmds[0] = cmds;
ts_cmd->cmds[1] = cmd_data;
ts_cmd->cmds[2] = 0 - cmds - cmd_data;
ts_cmd->initialized = true;
} else {
ts_cmd->initialized = false;
}
}
/**
* goodix_send_command - seng cmd to firmware
*
* @dev: pointer to device
* @cmd: pointer to command struct which cotain command data
* Returns 0 - succeed,<0 - failed
*/
int goodix_send_command(struct goodix_ts_device *dev,
struct goodix_ts_cmd *cmd)
{
int ret;
if (!cmd || !cmd->initialized)
return -EINVAL;
ret = goodix_i2c_write(dev, cmd->cmd_reg, cmd->cmds, cmd->length);
return ret;
}
static int goodix_read_version(struct goodix_ts_device *dev,
struct goodix_ts_version *version)
{
u8 buffer[GOODIX_PID_MAX_LEN + 1];
u8 temp_buf[256], checksum;
u8 pid_read_len = dev->reg.pid_len;
u8 vid_read_len = dev->reg.vid_len;
u8 sensor_id_mask = dev->reg.sensor_id_mask;
int r;
if (!version) {
ts_err("pointer of version is NULL");
return -EINVAL;
}
version->valid = false;
/*check reg info valid*/
if (!dev->reg.pid || !dev->reg.sensor_id || !dev->reg.vid) {
ts_err("reg is NULL, pid:0x%04x, vid:0x%04x, sensor_id:0x%04x",
dev->reg.pid, dev->reg.vid, dev->reg.sensor_id);
return -EINVAL;
}
if (!pid_read_len || pid_read_len > GOODIX_PID_MAX_LEN ||
!vid_read_len || vid_read_len > GOODIX_VID_MAX_LEN) {
ts_err("invalied pid vid length, pid_len:%d, vid_len:%d",
pid_read_len, vid_read_len);
return -EINVAL;
}
/*disable doze mode, just valid for normandy
* this func must be used in pairs
*/
if (goodix_set_i2c_doze_mode(dev, false)) {
ts_err("failed disable doze");
r = -EINVAL;
goto exit;
}
/*check checksum*/
if (dev->reg.version_base && dev->reg.version_len < 256) {
r = goodix_i2c_read(dev, dev->reg.version_base,
temp_buf, dev->reg.version_len);
if (r < 0) {
ts_err("Read version base failed, reg:0x%02x, len:%d",
dev->reg.version_base, dev->reg.version_len);
if (version)
version->valid = false;
goto exit;
}
checksum = checksum_u8(temp_buf, dev->reg.version_len);
if (checksum) {
ts_err("checksum error:0x%02x, base:0x%02x, len:%d",
checksum, dev->reg.version_base,
dev->reg.version_len);
ts_err("%*ph", (int)(dev->reg.version_len / 2),
temp_buf);
ts_err("%*ph", (int)(dev->reg.version_len -
dev->reg.version_len / 2),
&temp_buf[dev->reg.version_len / 2]);
if (version)
version->valid = false;
r = -EINVAL;
goto exit;
}
}
/*read pid*/
memset(buffer, 0, sizeof(buffer));
memset(version->pid, 0, sizeof(version->pid));
r = goodix_i2c_read(dev, dev->reg.pid, buffer, pid_read_len);
if (r < 0) {
ts_err("Read pid failed");
if (version)
version->valid = false;
goto exit;
}
/* check pid is digit or not, current we only support digital pid */
if (!isdigit(buffer[0]) || !isdigit(buffer[1])) {
ts_err("pid not digit: 0x%x,0x%x", buffer[0], buffer[1]);
r = -EINVAL;
goto exit;
}
memcpy(version->pid, buffer, pid_read_len);
/*read vid*/
memset(buffer, 0, sizeof(buffer));
memset(version->vid, 0, sizeof(version->vid));
r = goodix_i2c_read(dev, dev->reg.vid, buffer, vid_read_len);
if (r < 0) {
ts_err("Read vid failed");
if (version)
version->valid = false;
goto exit;
}
memcpy(version->vid, buffer, vid_read_len);
/*read sensor_id*/
memset(buffer, 0, sizeof(buffer));
r = goodix_i2c_read(dev, dev->reg.sensor_id, buffer, 1);
if (r < 0) {
ts_err("Read sensor_id failed");
if (version)
version->valid = false;
goto exit;
}
if (sensor_id_mask != 0) {
version->sensor_id = buffer[0] & sensor_id_mask;
ts_info("sensor_id_mask:0x%02x, sensor_id:0x%02x",
sensor_id_mask, version->sensor_id);
} else {
version->sensor_id = buffer[0];
}
version->valid = true;
ts_info("PID:%s,SensorID:%d, VID:%*ph", version->pid,
version->sensor_id, (int)sizeof(version->vid), version->vid);
exit:
/*enable doze mode, just valid for normandy
* this func must be used in pairs
*/
goodix_set_i2c_doze_mode(dev, true);
return r;
}
static int goodix_wait_cfg_cmd_ready(struct goodix_ts_device *dev,
u8 right_cmd, u8 send_cmd)
{
int try_times = 0;
u8 cmd_flag = 0;
u8 cmd_buf[3] = {0};
u16 command_reg = dev->reg.command;
struct goodix_ts_cmd ts_cmd;
goodix_cmds_init(&ts_cmd, send_cmd, 0, command_reg);
for (try_times = 0; try_times < TS_WAIT_CFG_READY_RETRY_TIMES;
try_times++) {
if (goodix_i2c_read(dev, command_reg, cmd_buf, 3)) {
ts_err("Read cmd_reg error");
return -EINVAL;
}
cmd_flag = cmd_buf[0];
if (cmd_flag == right_cmd) {
return 0;
} else if (cmd_flag != send_cmd) {
ts_err("failed cmd_reg:0x%X, 0x%X, 0x%X",
cmd_buf[0], cmd_buf[1], cmd_buf[2]);
if (goodix_send_command(dev, &ts_cmd)) {
ts_err("Resend cmd 0x%02X FAILED", send_cmd);
return -EINVAL;
}
}
usleep_range(10000, 11000);
}
return -EINVAL;
}
static int goodix_send_small_config(struct goodix_ts_device *dev,
struct goodix_ts_config *config)
{
int r = 0;
int try_times = 0;
u8 buf = 0;
u16 command_reg = dev->reg.command;
u16 cfg_reg = dev->reg.cfg_addr;
struct goodix_ts_cmd ts_cmd;
/*1. Inquire command_reg until it's free*/
for (try_times = 0; try_times < TS_WAIT_CMD_FREE_RETRY_TIMES;
try_times++) {
if (!goodix_i2c_read(dev, command_reg, &buf, 1) &&
buf == TS_CMD_REG_READY)
break;
usleep_range(10000, 11000);
}
if (try_times >= TS_WAIT_CMD_FREE_RETRY_TIMES) {
ts_err("failed send small cfg, reg:0x%04x is not 0xff",
command_reg);
r = -EINVAL;
goto exit;
}
/*2. write cfg data*/
if (goodix_i2c_write(dev, cfg_reg, config->data, config->length)) {
ts_err("send small cfg FAILED, write cfg to fw ERROR");
r = -EINVAL;
goto exit;
}
/*3. send 0x81 command*/
goodix_cmds_init(&ts_cmd, COMMAND_SEND_SMALL_CFG, 0, dev->reg.command);
if (goodix_send_command(dev, &ts_cmd)) {
ts_err("failed send large cfg, COMMAND_SEND_SMALL_CFG ERROR");
r = -EINVAL;
goto exit;
}
r = 0;
ts_info("send small cfg SUCCESS");
exit:
return r;
}
static int goodix_send_large_config(struct goodix_ts_device *dev,
struct goodix_ts_config *config)
{
int r = 0;
int try_times = 0;
u8 buf = 0;
u16 command_reg = dev->reg.command;
u16 cfg_reg = dev->reg.cfg_addr;
struct goodix_ts_cmd ts_cmd;
/*1. Inquire command_reg until it's free*/
for (try_times = 0; try_times < TS_WAIT_CMD_FREE_RETRY_TIMES;
try_times++) {
if (!goodix_i2c_read(dev, command_reg, &buf, 1) &&
buf == TS_CMD_REG_READY)
break;
usleep_range(10000, 11000);
}
if (try_times >= TS_WAIT_CMD_FREE_RETRY_TIMES) {
ts_err("failed send large cfg, reg:0x%04x is not 0xff",
command_reg);
r = -EINVAL;
goto exit;
}
/*2. send "start write cfg" command*/
goodix_cmds_init(&ts_cmd, COMMAND_START_SEND_CFG, 0, dev->reg.command);
if (goodix_send_command(dev, &ts_cmd)) {
ts_err("failed send large cfg, COMMAND_START_SEND_CFG ERROR");
r = -EINVAL;
goto exit;
}
/*3. wait ic set command_reg to 0x82*/
if (goodix_wait_cfg_cmd_ready(dev, COMMAND_SEND_CFG_PREPARE_OK,
COMMAND_START_SEND_CFG)) {
ts_err("failed send large cfg, reg:0x%04x is not 0x82",
command_reg);
r = -EINVAL;
goto exit;
}
/*4. write cfg*/
if (goodix_i2c_write(dev, cfg_reg, config->data, config->length)) {
ts_err("Send large cfg FAILED, write cfg to fw ERROR");
r = -EINVAL;
goto exit;
}
/*5. send "end send cfg" command*/
goodix_cmds_init(&ts_cmd, COMMAND_END_SEND_CFG, 0, dev->reg.command);
if (goodix_send_command(dev, &ts_cmd)) {
ts_err("failed send large cfg, COMMAND_END_SEND_CFG ERROR");
r = -EINVAL;
goto exit;
}
/*6. wait ic set command_reg to 0xff*/
for (try_times = 0; try_times < TS_WAIT_CMD_FREE_RETRY_TIMES;
try_times++) {
if (!goodix_i2c_read(dev, command_reg, &buf, 1) &&
buf == TS_CMD_REG_READY)
break;
usleep_range(10000, 11000);
}
if (try_times >= TS_WAIT_CMD_FREE_RETRY_TIMES) {
ts_err("failed send large cfg, reg:0x%04x is not 0xff",
command_reg);
r = -EINVAL;
goto exit;
}
ts_info("Send large cfg SUCCESS");
r = 0;
exit:
return r;
}
static int goodix_check_cfg_valid(struct goodix_ts_device *dev, u8 *cfg, u32 length)
{
int ret;
u8 bag_num;
u8 checksum;
int i, j;
int bag_start = 0;
int bag_end = 0;
if (!cfg || length < TS_CFG_HEAD_LEN) {
ts_err("cfg is INVALID, len:%d", length);
ret = -EINVAL;
goto exit;
}
if (dev->ic_type == IC_TYPE_NANJING) {
/*check configuration head checksum*/
checksum = 0;
for (i = 0; i < 3; i++)
checksum += cfg[i];
if (checksum != 0) {
ts_err("cfg head checksum ERROR, checksum:0x%02x",
checksum);
ret = -EINVAL;
goto exit;
}
bag_num = cfg[1];
bag_start = 3;
} else if (dev->ic_type == IC_TYPE_NORMANDY) {
checksum = 0;
for (i = 0; i < TS_CFG_HEAD_LEN; i++)
checksum += cfg[i];
if (checksum != 0) {
ts_err("cfg head checksum ERROR, checksum:0x%02x",
checksum);
ret = -EINVAL;
goto exit;
}
bag_num = cfg[TS_CFG_BAG_NUM_INDEX];
bag_start = TS_CFG_BAG_START_INDEX;
} else {
ts_err("cfg check FAILED, unkonw ic_type");
ret = -EINVAL;
goto exit;
}
ts_info("cfg bag_num:%d, cfg length:%d", bag_num, length);
/*check each bag's checksum*/
for (j = 0; j < bag_num; j++) {
if (bag_start >= length - 1) {
ts_err("ERROR, overflow!!bag_start:%d, cfg_len:%d",
bag_start, length);
ret = -EINVAL;
goto exit;
}
bag_end = bag_start + cfg[bag_start + 1] + 3;
if ((j == 0) && (dev->ic_type == IC_TYPE_NANJING))
/*the first bag of nanjing cfg is different!*/
bag_end = 336;
checksum = 0;
if (bag_end > length) {
ts_err("ERROR, overflow!!bag:%d, bag_start:%d,"
"bag_end:%d, cfg length:%d",
j, bag_start, bag_end, length);
ret = -EINVAL;
goto exit;
}
for (i = bag_start; i < bag_end; i++)
checksum += cfg[i];
if (checksum != 0) {
ts_err("cfg INVALID, bag:%d checksum ERROR:0x%02x",
j, checksum);
ret = -EINVAL;
goto exit;
}
bag_start = bag_end;
}
ret = 0;
ts_info("configuration check SUCCESS");
exit:
return ret;
}
static int goodix_send_config(struct goodix_ts_device *dev,
struct goodix_ts_config *config)
{
int r = 0;
if (!config || !config->initialized) {
ts_err("invalid config data");
return -EINVAL;
}
/*check configuration valid*/
r = goodix_check_cfg_valid(dev, config->data, config->length);
if (r != 0) {
ts_err("cfg check FAILED");
return -EINVAL;
}
ts_info("ver:%02xh,size:%d", config->data[0], config->length);
mutex_lock(&config->lock);
if (dev->ic_type == IC_TYPE_NANJING)
r = goodix_send_large_config(dev, config);
else if (dev->ic_type == IC_TYPE_NORMANDY) {
/*disable doze mode*/
if(!goodix_set_i2c_doze_mode(dev, false)) {
if (config->length > 32)
r = goodix_send_large_config(dev, config);
else
r = goodix_send_small_config(dev, config);
} else {
ts_err("failed disable doze[abort]");
r = -EINVAL;
}
/*enable doze mode*/
goodix_set_i2c_doze_mode(dev, true);
}
if (r != 0)
ts_err("send_cfg FAILED, ic_type:%d, cfg_len:%d",
dev->ic_type, config->length);
mutex_unlock(&config->lock);
return r;
}
/**
* goodix_close_hidi2c_mode
* Called by touch core module when bootup
* @ts_dev: pointer to touch device
* return: 0 - no error, <0 error
*/
static int goodix_close_hidi2c_mode(struct goodix_ts_device *ts_dev)
{
int r = 0;
int try_times;
int j;
unsigned char buffer[1];
unsigned char reg_sta;
struct goodix_ts_cmd ts_cmd;
for (try_times = 0; try_times < 10; try_times++) {
if (goodix_i2c_read(ts_dev, 0x8040, &reg_sta, 1) != 0)
continue;
else if (reg_sta == 0xff)
break;
usleep_range(10000, 11000);
}
if (try_times >= 10) {
ts_info("failed close hidi2c mode");
return -EINVAL;
}
goodix_cmds_init(&ts_cmd, COMMAND_CLOSE_HID, 0, 0x8040);
for (try_times = 0; try_times < 3; try_times++) {
if (ts_cmd.initialized) {
r = goodix_send_command(ts_dev, &ts_cmd);
if (r)
continue;
usleep_range(100000, 110000);
/*read 0x8040, if it's not 0xFF,continue*/
for (j = 0; j < 3; j++) {
if (goodix_i2c_read(ts_dev, 0x8040, buffer, 1) != 0)
continue;
else {
if (buffer[0] != 0xFF) {
ts_info("try_times:%d:%d, read 0x8040:0x%02x",
try_times, j, buffer[0]);
usleep_range(10000, 11000);
continue;
} else
goto exit;
}
}
}
}
exit:
if (try_times >= 3) {
ts_info("close hid_i2c mode FAILED");
r = -EINVAL;
} else {
ts_info("close hid_i2c mode SUCCESS");
r = 0;
}
return r;
}
/* success return config length else return -1 */
static int _goodix_do_read_config(struct goodix_ts_device *dev,
u32 base_addr, u8 *buf)
{
int sub_bags = 0;
int offset = 0;
int subbag_len;
u8 checksum;
int i;
int ret;
/*disable doze mode*/
if (goodix_set_i2c_doze_mode(dev, false)) {
ts_err("failed disable doze mode[abort]");
ret = -EINVAL;
goto err_out;
}
ret = goodix_i2c_read(dev, base_addr, buf, TS_CFG_HEAD_LEN);
if (ret)
goto err_out;
if (dev->ic_type == IC_TYPE_NANJING) {
offset = 3;
sub_bags = buf[1];
checksum = checksum_u8(buf, 3);
} else {
offset = TS_CFG_BAG_START_INDEX;
sub_bags = buf[TS_CFG_BAG_NUM_INDEX];
checksum = checksum_u8(buf, TS_CFG_HEAD_LEN);
}
if (checksum) {
ts_err("Config head checksum err:0x%x,data:%*ph",
checksum, TS_CFG_HEAD_LEN, buf);
ret = -EINVAL;
goto err_out;
}
ts_info("config_version:%u, vub_bags:%u", buf[0], sub_bags);
for (i = 0; i < sub_bags; i++) {
/* read sub head [0]: sub bag num, [1]: sub bag length */
ret = goodix_i2c_read(dev, base_addr + offset, buf + offset, 2);
if (ret)
goto err_out;
/* read sub bag data */
if (dev->ic_type == IC_TYPE_NANJING && i == 0)
subbag_len = buf[offset + 1] + 256;
else
subbag_len = buf[offset + 1];
ts_debug("sub bag num:%u,sub bag length:%u",
buf[offset], subbag_len);
ret = goodix_i2c_read(dev, base_addr + offset + 2,
buf + offset + 2, subbag_len + 1);
if (ret)
goto err_out;
checksum = checksum_u8(buf + offset, subbag_len + 3);
if (checksum) {
ts_err("sub bag checksum err:0x%x", checksum);
ret = -EINVAL;
goto err_out;
}
offset += subbag_len + 3;
ts_debug("sub bag %d, data:%*ph",
buf[offset], buf[offset + 1] + 3, buf + offset);
}
ret = offset;
err_out:
/*enable doze mode*/
goodix_set_i2c_doze_mode(dev, true);
return ret;
}
/* success return config_len, <= 0 failed */
static int goodix_read_config(struct goodix_ts_device *dev,
u8 *config_data, u32 config_len)
{
struct goodix_ts_cmd ts_cmd;
u8 cmd_flag;
u32 cmd_reg = dev->reg.command;
int r = 0;
int i;
if (!config_data || config_len > GOODIX_CFG_MAX_SIZE) {
ts_err("Illegal params");
return -EINVAL;
}
if (!dev->reg.command) {
ts_err("command register ERROR:0x%04x", dev->reg.command);
return -EINVAL;
}
/*disable doze mode*/
if (goodix_set_i2c_doze_mode(dev, false)) {
ts_err("failed disabled doze[abort]");
r = -EINVAL;
goto exit;
}
/* wait for IC in IDLE state */
for (i = 0; i < TS_WAIT_CMD_FREE_RETRY_TIMES; i++) {
cmd_flag = 0;
r = goodix_i2c_read(dev, cmd_reg, &cmd_flag, 1);
if (r < 0 || cmd_flag == TS_CMD_REG_READY)
break;
usleep_range(10000, 11000);
}
if (cmd_flag != TS_CMD_REG_READY) {
ts_err("Wait for IC ready IDEL state timeout:addr 0x%x\n",
cmd_reg);
r = -EAGAIN;
goto exit;
}
/* 0x86 read config command */
goodix_cmds_init(&ts_cmd, COMMAND_START_READ_CFG, 0, cmd_reg);
r = goodix_send_command(dev, &ts_cmd);
if (r) {
ts_err("Failed send read config command");
goto exit;
}
/* wait for config data ready */
if (goodix_wait_cfg_cmd_ready(dev, COMMAND_READ_CFG_PREPARE_OK,
COMMAND_START_READ_CFG)) {
ts_err("Wait for config data ready timeout");
r = -EAGAIN;
goto exit;
}
if (config_len) {
r = goodix_i2c_read(dev, cmd_reg + 16, config_data, config_len);
if (r)
ts_err("Failed read config data");
else
r = config_len;
} else {
r = _goodix_do_read_config(dev, cmd_reg + 16, config_data);
if (r < 0)
ts_err("Failed read config data");
}
if (r > 0)
ts_info("success read config, len:%d", r);
/* clear command */
goodix_cmds_init(&ts_cmd, TS_CMD_REG_READY, 0, cmd_reg);
goodix_send_command(dev, &ts_cmd);
exit:
/*enable doze mode*/
goodix_set_i2c_doze_mode(dev, true);
return r;
}
/**
* goodix_hw_init - hardware initialize
* Called by touch core module when bootup
* @ts_dev: pointer to touch device
* return: 0 - no error, <0 error
*/
static int goodix_hw_init(struct goodix_ts_device *ts_dev)
{
int r = 0;
BUG_ON(!ts_dev);
/*for Nanjing IC, close HID_I2C mode when driver is probed*/
if (ts_dev->ic_type == IC_TYPE_NANJING) {
r = goodix_close_hidi2c_mode(ts_dev);
if (r < 0)
ts_info("close hid i2c mode FAILED");
}
return r;
}
/**
* goodix_hw_reset - reset device
*
* @dev: pointer to touch device
* Returns 0 - succeed,<0 - failed
*/
int goodix_hw_reset(struct goodix_ts_device *dev)
{
u8 data[2] = {0x00};
int r = 0;
ts_info("HW reset");
if (dev->ic_type == IC_TYPE_NANJING) {
ts_info("nanjing reset");
/*close watch dog*/
data[0] = 0;
goodix_i2c_write(dev, 0x40b0, data, 1);
usleep_range(10000, 20000);
/*soft reset*/
data[0] = 1;
goodix_i2c_write_trans_once(dev, 0x4180, data, 1);
msleep(250);
goodix_close_hidi2c_mode(dev);
/*clear coor_reg*/
data[0] = 0;
data[1] = 0;
goodix_i2c_write(dev, 0x824d, data, 2);
} else {
ts_info("normandy reset");
gpio_direction_output(dev->board_data.reset_gpio, 0);
udelay(2000);
gpio_direction_output(dev->board_data.reset_gpio, 1);
msleep(100);
}
/*init static esd*/
data[0] = GOODIX_ESD_TICK_WRITE_DATA;
if (dev->ic_type == IC_TYPE_NANJING) {
r = goodix_i2c_write(dev, 0x8043, data, 1);
if (r < 0)
ts_err("fialed init static esd");
}
/*init dynamic esd*/
if (dev->reg.esd) {
r = goodix_i2c_write_trans(dev, dev->reg.esd, data, 1);
if (r < 0)
ts_err("IC reset, init dynamic esd FAILED");
} else {
ts_info("reg.esd is NULL, skip dynamic esd init");
}
return 0;
}
/**
* goodix_request_handler - handle firmware request
*
* @dev: pointer to touch device
* @request_data: requset information
* Returns 0 - succeed,<0 - failed
*/
static int goodix_request_handler(struct goodix_ts_device *dev)
{
unsigned char buffer[1];
int r;
r = goodix_i2c_read_trans(dev, dev->reg.fw_request, buffer, 1);
if (r < 0)
return r;
switch (buffer[0]) {
case REQUEST_CONFIG:
ts_info("HW request config");
r = goodix_send_config(dev, &(dev->normal_cfg));
if (r != 0)
ts_info("request config, send config faild");
break;
case REQUEST_BAKREF:
ts_info("HW request bakref");
break;
case REQUEST_RESET:
ts_info("HW requset reset");
r = goodix_hw_reset(dev);
if (r != 0)
ts_info("request reset, reset faild");
break;
case REQUEST_RELOADFW:
ts_info("HW request reload fw");
goodix_do_fw_update(UPDATE_MODE_FORCE|UPDATE_MODE_SRC_REQUEST);
break;
case REQUEST_IDLE:
ts_info("HW request idle");
break;
default:
ts_info("Unknown hw request:%d", buffer[0]);
break;
}
buffer[0] = 0x00;
r = goodix_i2c_write_trans(dev, dev->reg.fw_request, buffer, 1);
return r;
}
static void goodix_swap_coords(struct goodix_ts_device *dev,
unsigned int *coor_x, unsigned int *coor_y)
{
unsigned int temp;
struct goodix_ts_board_data *bdata = &dev->board_data;
if (bdata->swap_axis) {
temp = *coor_x;
*coor_x = *coor_y;
*coor_y = temp;
}
if (bdata->x2x)
*coor_x = bdata->panel_max_x - *coor_x;
if (bdata->y2y)
*coor_y = bdata->panel_max_y - *coor_y;
}
#define GOODIX_KEY_STATE 0x10
static void goodix_parse_finger(struct goodix_ts_device *dev,
struct goodix_touch_data *touch_data, unsigned char *buf, int touch_num)
{
unsigned int id = 0, x = 0, y = 0, w = 0;
static u8 pre_key_map;
u8 cur_key_map = 0;
static u32 pre_finger_map;
u32 cur_finger_map = 0;
u8 *coor_data;
int i;
coor_data = &buf[2];
for (i = 0; i < touch_num; i++) {
id = coor_data[i * BYTES_PER_COORD];
if(id >= GOODIX_MAX_TOUCH){
ts_info("invaild finger id =%d", id);
break;
}
x = coor_data[i * BYTES_PER_COORD + 1] |
coor_data[i * BYTES_PER_COORD + 2] << 8;
y = coor_data[i * BYTES_PER_COORD + 3] |
coor_data[i * BYTES_PER_COORD + 4] << 8;
w = coor_data[i * BYTES_PER_COORD + 5];
goodix_swap_coords(dev, &x, &y);
touch_data->coords[id].status = TS_TOUCH;
touch_data->coords[id].x = x;
touch_data->coords[id].y = y;
touch_data->coords[id].w = w;
cur_finger_map |= (1 << id);
}
/* process finger release */
for (i = 0; i < GOODIX_MAX_TOUCH; i++) {
if (cur_finger_map & (1 << i))
continue;
if (pre_finger_map & (1 << i))
touch_data->coords[i].status = TS_RELEASE;
}
pre_finger_map = cur_finger_map;
touch_data->touch_num = touch_num;
if (buf[1] & GOODIX_KEY_STATE) {
/* have key */
cur_key_map = buf[touch_num * BYTES_PER_COORD + 2] & 0x0F;
for (i = 0; i < GOODIX_MAX_TP_KEY; i++) {
if (cur_key_map & (1 << i)) {
touch_data->keys[i].status = TS_TOUCH;
touch_data->keys[i].code =
dev->board_data.panel_key_map[i];
}
}
}
/* process key release */
for (i = 0; i < GOODIX_MAX_TP_KEY; i++) {
if (cur_key_map & (1 << i) || !(pre_key_map & (1 << i)))
continue;
touch_data->keys[i].status = TS_RELEASE;
touch_data->keys[i].code = dev->board_data.panel_key_map[i];
}
pre_key_map = cur_key_map;
}
static unsigned int goodix_pen_btn_code[] = {BTN_STYLUS, BTN_STYLUS2};
static void goodix_parse_pen(struct goodix_ts_device *dev,
struct goodix_pen_data *pen_data, unsigned char *buf, int touch_num)
{
unsigned int id = 0;
static u8 pre_key_map;
u8 cur_key_map = 0;
static u32 pre_pen_status;
u32 cur_pen_status = 0;
u8 *coor_data;
int i;
coor_data = &buf[2];
for (i = 0; i < touch_num; i++) {
/* search for pen coordinate */
id = coor_data[i * BYTES_PER_COORD];
if (id < 0x80)
continue;
pen_data->coords.x = coor_data[i * BYTES_PER_COORD + 1] |
coor_data[i * BYTES_PER_COORD + 2] << 8;
pen_data->coords.y = coor_data[i * BYTES_PER_COORD + 3] |
coor_data[i * BYTES_PER_COORD + 4] << 8;
pen_data->coords.p = coor_data[i * BYTES_PER_COORD + 5] |
coor_data[i * BYTES_PER_COORD + 6] << 8;
goodix_swap_coords(dev, &pen_data->coords.x,
&pen_data->coords.y);
pen_data->coords.status = TS_TOUCH;
pen_data->coords.tool_type = BTN_TOOL_PEN;
cur_pen_status = 1;
/* currently only support one stylus */
break;
}
if (!cur_pen_status && pre_pen_status) {
pen_data->coords.status = TS_RELEASE;
}
pre_pen_status = cur_pen_status;
/* process pen button */
if (buf[1] & GOODIX_KEY_STATE) {
cur_key_map = (buf[touch_num * BYTES_PER_COORD + 2] >> 4) & 0x0F;
for (i = 0; i < GOODIX_MAX_PEN_KEY; i++) {
if (!(cur_key_map & (1 << i)))
continue;
pen_data->keys[i].status = TS_TOUCH;
pen_data->keys[i].code = goodix_pen_btn_code[i];
}
}
for (i = 0; i < GOODIX_MAX_PEN_KEY; i++) {
if (cur_key_map & (1 << i) || !(pre_key_map & (1 << i)))
continue;
pen_data->keys[i].status = TS_RELEASE;
pen_data->keys[i].code = goodix_pen_btn_code[i];
}
pre_key_map = cur_key_map;
}
static int goodix_touch_handler(struct goodix_ts_device *dev,
struct goodix_ts_event *ts_event,
u8 *pre_buf, u32 pre_buf_len)
{
struct goodix_touch_data *touch_data = &ts_event->touch_data;
struct goodix_pen_data *pen_data = &ts_event->pen_data;
unsigned char buffer[4 + BYTES_PER_COORD * GOODIX_MAX_TOUCH];
int touch_num = 0, r;
unsigned char chksum = 0;
static u8 pre_finger_num = 0;
static u8 pre_pen_num = 0;
/* clean event buffer */
memset(ts_event, 0, sizeof(*ts_event));
/* copy pre-data to buffer */
memcpy(buffer, pre_buf, pre_buf_len);
touch_num = buffer[1] & 0x0F;
if (unlikely(touch_num > GOODIX_MAX_TOUCH)) {
touch_num = -EINVAL;
goto exit_clean_sta;
}
if (unlikely(touch_num > 1)) {
r = goodix_i2c_read_trans(dev,
dev->reg.coor + 4 + BYTES_PER_COORD,
&buffer[4 + BYTES_PER_COORD],
(touch_num - 1) * BYTES_PER_COORD);
if (unlikely(r < 0))
goto exit_clean_sta;
}
chksum = checksum_u8(&buffer[0], touch_num * BYTES_PER_COORD + 4);
if (unlikely(chksum != 0)) {
ts_err("Checksum error:%X, ic_type:%d", chksum, dev->ic_type);
r = -EINVAL;
goto exit_clean_sta;
}
if (touch_num >= 1 &&
buffer[(touch_num - 1) * BYTES_PER_COORD + 2] >= 0x80) {
if (pre_finger_num) {
ts_event->event_type = EVENT_TOUCH;
goodix_parse_finger(dev, touch_data, buffer, 0);
pre_finger_num = 0;
} else {
pre_pen_num = 1;
ts_event->event_type = EVENT_PEN;
goodix_parse_pen(dev, pen_data, buffer, touch_num);
}
} else {
if (pre_pen_num) {
ts_event->event_type = EVENT_PEN;
goodix_parse_pen(dev, pen_data, buffer, 0);
pre_pen_num = 0;
} else {
ts_event->event_type = EVENT_TOUCH;
goodix_parse_finger(dev, touch_data,
buffer, touch_num);
pre_finger_num = touch_num;
}
}
exit_clean_sta:
return r;
}
static int goodix_event_handler(struct goodix_ts_device *dev,
struct goodix_ts_event *ts_event)
{
unsigned char pre_buf[4 + BYTES_PER_COORD];
unsigned char event_sta;
int r;
r = goodix_i2c_read_trans(dev, dev->reg.coor,
pre_buf, 4 + BYTES_PER_COORD);
if (unlikely(r < 0))
return r;
/* buffer[0]: event state */
event_sta = pre_buf[0];
if (likely((event_sta & GOODIX_TOUCH_EVENT) == GOODIX_TOUCH_EVENT)) {
/* handle touch event */
goodix_touch_handler(dev, ts_event, pre_buf,
4 + BYTES_PER_COORD);
} else if (unlikely((event_sta & GOODIX_REQUEST_EVENT) ==
GOODIX_REQUEST_EVENT)) {
/* handle request event */
ts_event->event_type = EVENT_REQUEST;
goodix_request_handler(dev);
} else if ((event_sta & GOODIX_GESTURE_EVENT) ==
GOODIX_GESTURE_EVENT) {
/* handle gesture event */
ts_debug("Gesture event");
} else if ((event_sta & GOODIX_HOTKNOT_EVENT) ==
GOODIX_HOTKNOT_EVENT) {
/* handle hotknot event */
ts_debug("Hotknot event");
} else {
ts_debug("unknow event type:0x%x", event_sta);
r = -EINVAL;
}
return r;
}
/**
* goodix_hw_suspend - Let touch deivce stay in lowpower mode.
* @dev: pointer to goodix touch device
* @return: 0 - succeed, < 0 - failed
*/
static int goodix_hw_suspend(struct goodix_ts_device *dev)
{
struct goodix_ts_cmd sleep_cmd;
int r = 0;
goodix_cmds_init(&sleep_cmd, COMMAND_SLEEP, 0, dev->reg.command);
if (sleep_cmd.initialized) {
r = goodix_send_command(dev, &sleep_cmd);
if (!r)
ts_info("Chip in sleep mode");
} else {
ts_err("Uninitialized sleep command");
}
return r;
}
/**
* goodix_hw_resume - Let touch deivce stay in active mode.
* @dev: pointer to goodix touch device
* @return: 0 - succeed, < 0 - failed
*/
static int goodix_hw_resume(struct goodix_ts_device *dev)
{
int retry = GOODIX_BUS_RETRY_TIMES;
u8 temp_buf[256], checksum;
u8 data[2] = {0x00};
int r = 0, i;
for (; retry > 0; retry--) {
if (dev->ic_type == IC_TYPE_NORMANDY) {
goodix_hw_reset(dev);
} else if (dev->ic_type == IC_TYPE_NANJING) {
/* 1. read 0x8000 to resume nanjing */
goodix_i2c_read(dev, 0x8000, data, 1);
msleep(150);
/* 2. check resume success or not */
for (i = 0; i < 10; i++) {
r = goodix_i2c_read(dev, dev->reg.command,
data, 1);
if (!r && data[0] == 0xff)
break;
msleep(20);
}
if (i >= 10) {
ts_err("failed resume from sleep mode");
continue;
}
/* 3. close hid i2c */
goodix_close_hidi2c_mode(dev);
/* 4. clear coor */
data[0] = 0;
data[1] = 0;
goodix_i2c_write(dev, 0x824d, data, 2);
}
/* Why need do this?? read version and check checksum */
if (dev->reg.version_base && dev->reg.version_len < 256) {
r = goodix_i2c_read(dev, dev->reg.version_base,
temp_buf, dev->reg.version_len);
if (r < 0)
continue;
checksum = checksum_u8(temp_buf, dev->reg.version_len);
if (!checksum) {
ts_info("read version SUCCESS");
break;
}
} else {
break;
}
}
return r;
}
static int goodix_esd_check(struct goodix_ts_device *dev)
{
int r;
u8 data = 0;
if (dev->reg.esd == 0) {
ts_err("esd reg is NULL");
return 0;
}
/*check dynamic esd*/
if (dev->ic_type == IC_TYPE_NORMANDY)
r = dev->hw_ops->read_trans(dev, TS_REG_ESD_TICK_R, &data, 1);
else
r = dev->hw_ops->read_trans(dev, dev->reg.esd, &data, 1);
if (r < 0 || (data == GOODIX_ESD_TICK_WRITE_DATA)) {
ts_info("dynamic esd occur, r:%d, data:0x%02x", r, data);
r = -EINVAL;
goto exit;
}
/*check static esd*/
if (dev->ic_type == IC_TYPE_NANJING) {
r = dev->hw_ops->read_trans(dev, 0x8043, &data, 1);
if (r < 0 || (data != 0xaa)) {
ts_info("static esd occur, r:%d, data:0x%02x", r, data);
r = -EINVAL;
goto exit;
}
}
exit:
return r;
}
/* hardware opeation funstions */
static const struct goodix_ts_hw_ops hw_i2c_ops = {
.init = goodix_hw_init,
.dev_confirm = goodix_ts_dev_confirm,
.read = goodix_i2c_read,
.write = goodix_i2c_write,
.read_trans = goodix_i2c_read_trans,
.write_trans = goodix_i2c_write_trans,
.reset = goodix_hw_reset,
.event_handler = goodix_event_handler,
.send_config = goodix_send_config,
.read_config = goodix_read_config,
.send_cmd = goodix_send_command,
.read_version = goodix_read_version,
.suspend = goodix_hw_suspend,
.resume = goodix_hw_resume,
.check_hw = goodix_esd_check,
};
static struct platform_device *goodix_pdev;
static void goodix_pdev_release(struct device *dev)
{
ts_info("goodix pdev released");
}
static int goodix_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id)
{
struct goodix_ts_device *ts_device = NULL;
int r = 0;
ts_info("goodix_i2c_probe IN");
r = i2c_check_functionality(client->adapter,
I2C_FUNC_I2C);
if (!r)
return -EIO;
/* ts device data */
ts_device = devm_kzalloc(&client->dev,
sizeof(struct goodix_ts_device), GFP_KERNEL);
if (!ts_device)
return -ENOMEM;
if (IS_ENABLED(CONFIG_OF) && client->dev.of_node) {
/* parse devicetree property */
r = goodix_parse_dt(client->dev.of_node,
&ts_device->board_data);
if (r < 0) {
ts_err("failed parse device info form dts, %d", r);
return -EINVAL;
}
} else {
ts_err("no valid device tree node found");
return -ENODEV;
}
ts_device->name = "Goodix TouchDevcie";
ts_device->dev = &client->dev;
ts_device->hw_ops = &hw_i2c_ops;
/* ts core device */
goodix_pdev = kzalloc(sizeof(struct platform_device), GFP_KERNEL);
if (!goodix_pdev)
return -ENOMEM;
goodix_pdev->name = GOODIX_CORE_DRIVER_NAME;
goodix_pdev->id = 0;
goodix_pdev->num_resources = 0;
/*
* you can find this platform dev in
* /sys/devices/platfrom/goodix_ts.0
* goodix_pdev->dev.parent = &client->dev;
*/
goodix_pdev->dev.platform_data = ts_device;
goodix_pdev->dev.release = goodix_pdev_release;
/* register platform device, then the goodix_ts_core
* module will probe the touch deivce.
*/
r = platform_device_register(goodix_pdev);
if (r) {
ts_err("failed register goodix platform device, %d", r);
goto err_pdev;
}
r = goodix_ts_core_init();
if (r) {
ts_err("failed register platform driver, %d", r);
goto err_pdriver;
}
ts_info("i2c probe out");
return r;
err_pdriver:
platform_device_unregister(goodix_pdev);
err_pdev:
kfree(goodix_pdev);
goodix_pdev = NULL;
ts_info("i2c probe out, %d", r);
return r;
}
static int goodix_i2c_remove(struct i2c_client *client)
{
if (goodix_pdev) {
platform_device_unregister(goodix_pdev);
kfree(goodix_pdev);
goodix_pdev = NULL;
}
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id i2c_matchs[] = {
{.compatible = "goodix,gt9886",},
{.compatible = "goodix,gt9889",},
{.compatible = "goodix,gt8589",},
{},
};
MODULE_DEVICE_TABLE(of, i2c_matchs);
#endif
static const struct i2c_device_id i2c_id_table[] = {
{TS_DRIVER_NAME, 0},
{},
};
MODULE_DEVICE_TABLE(i2c, i2c_id_table);
static struct i2c_driver goodix_i2c_driver = {
.driver = {
.name = TS_DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(i2c_matchs),
},
.probe = goodix_i2c_probe,
.remove = goodix_i2c_remove,
.id_table = i2c_id_table,
};
/* release manully when prob failed */
void goodix_ts_dev_release(void)
{
if (goodix_pdev) {
platform_device_unregister(goodix_pdev);
kfree(goodix_pdev);
goodix_pdev = NULL;
}
i2c_del_driver(&goodix_i2c_driver);
}
static int __init goodix_i2c_init(void)
{
ts_info("Goodix driver init");
return i2c_add_driver(&goodix_i2c_driver);
}
static void __exit goodix_i2c_exit(void)
{
i2c_del_driver(&goodix_i2c_driver);
ts_info("Goodix driver exit");
}
module_init(goodix_i2c_init);
module_exit(goodix_i2c_exit);
MODULE_DESCRIPTION("Goodix Touchscreen Hardware Module");
MODULE_AUTHOR("Goodix, Inc.");
MODULE_LICENSE("GPL v2");