M7350/kernel/drivers/input/touchscreen/ft5x06_ts.c

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2024-09-09 08:52:07 +00:00
/*
*
* FocalTech ft5x06 TouchScreen driver.
*
* Copyright (c) 2010 Focal tech Ltd.
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/regulator/consumer.h>
#include <linux/firmware.h>
#include <linux/debugfs.h>
#include <linux/input/ft5x06_ts.h>
#if defined(CONFIG_FB)
#include <linux/notifier.h>
#include <linux/fb.h>
#elif defined(CONFIG_HAS_EARLYSUSPEND)
#include <linux/earlysuspend.h>
/* Early-suspend level */
#define FT_SUSPEND_LEVEL 1
#endif
#define CFG_MAX_TOUCH_POINTS 5
#define FT_STARTUP_DLY 150
#define FT_RESET_DLY 20
#define FT_PRESS 0x7F
#define FT_MAX_ID 0x0F
#define FT_TOUCH_STEP 6
#define FT_TOUCH_X_H_POS 3
#define FT_TOUCH_X_L_POS 4
#define FT_TOUCH_Y_H_POS 5
#define FT_TOUCH_Y_L_POS 6
#define FT_TOUCH_EVENT_POS 3
#define FT_TOUCH_ID_POS 5
#define POINT_READ_BUF (3 + FT_TOUCH_STEP * CFG_MAX_TOUCH_POINTS)
/*register address*/
#define FT_REG_DEV_MODE 0x00
#define FT_DEV_MODE_REG_CAL 0x02
#define FT_REG_ID 0xA3
#define FT_REG_PMODE 0xA5
#define FT_REG_FW_VER 0xA6
#define FT_REG_POINT_RATE 0x88
#define FT_REG_THGROUP 0x80
#define FT_REG_ECC 0xCC
#define FT_REG_RESET_FW 0x07
/* power register bits*/
#define FT_PMODE_ACTIVE 0x00
#define FT_PMODE_MONITOR 0x01
#define FT_PMODE_STANDBY 0x02
#define FT_PMODE_HIBERNATE 0x03
#define FT_FACTORYMODE_VALUE 0x40
#define FT_WORKMODE_VALUE 0x00
#define FT_RST_CMD_REG 0xFC
#define FT_READ_ID_REG 0x90
#define FT_ERASE_APP_REG 0x61
#define FT_ERASE_PANEL_REG 0x63
#define FT_FW_START_REG 0xBF
#define FT_VTG_MIN_UV 2600000
#define FT_VTG_MAX_UV 3300000
#define FT_I2C_VTG_MIN_UV 1800000
#define FT_I2C_VTG_MAX_UV 1800000
#define FT_COORDS_ARR_SIZE 4
#define MAX_BUTTONS 4
#define FT_8BIT_SHIFT 8
#define FT_4BIT_SHIFT 4
#define FT_FW_NAME_MAX_LEN 50
#define FT5316_ID 0x0A
#define FT5306I_ID 0x55
#define FT_UPGRADE_AA 0xAA
#define FT_UPGRADE_55 0x55
/*upgrade config of FT5606*/
#define FT5606_UPGRADE_AA_DELAY 50
#define FT5606_UPGRADE_55_DELAY 10
#define FT5606_UPGRADE_ID_1 0x79
#define FT5606_UPGRADE_ID_2 0x06
#define FT5606_UPGRADE_READID_DELAY 100
#define FT5606_UPGRADE_EARSE_DELAY 2000
/*upgrade config of FT5316*/
#define FT5316_UPGRADE_AA_DELAY 50
#define FT5316_UPGRADE_55_DELAY 30
#define FT5316_UPGRADE_ID_1 0x79
#define FT5316_UPGRADE_ID_2 0x07
#define FT5316_UPGRADE_READID_DELAY 1
#define FT5316_UPGRADE_EARSE_DELAY 1500
/*upgrade config of FT5x06(x=2,3,4)*/
#define FT5X06_UPGRADE_AA_DELAY 50
#define FT5X06_UPGRADE_55_DELAY 30
#define FT5X06_UPGRADE_ID_1 0x79
#define FT5X06_UPGRADE_ID_2 0x03
#define FT5X06_UPGRADE_READID_DELAY 1
#define FT5X06_UPGRADE_EARSE_DELAY 2000
/*upgrade config of FT6208*/
#define FT6208_UPGRADE_AA_DELAY 60
#define FT6208_UPGRADE_55_DELAY 10
#define FT6208_UPGRADE_ID_1 0x79
#define FT6208_UPGRADE_ID_2 0x05
#define FT6208_UPGRADE_READID_DELAY 10
#define FT6208_UPGRADE_EARSE_DELAY 2000
#define FT_UPGRADE_INFO(x, y) do { \
x->delay_55 = y##_UPGRADE_55_DELAY; \
x->delay_aa = y##_UPGRADE_AA_DELAY; \
x->upgrade_id_1 = y##_UPGRADE_ID_1; \
x->upgrade_id_2 = y##_UPGRADE_ID_2; \
x->delay_readid = y##_UPGRADE_READID_DELAY; \
x->delay_earse_flash = y##_UPGRADE_EARSE_DELAY; \
} while (0)
#define FT_FW_MIN_SIZE 8
#define FT_FW_MAX_SIZE 32768
#define FT_FW_FILE_VER(x) ((x)->data[(x)->size - 2])
#define FT_FW_CHECK(x) \
(((x)->data[(x)->size - 8] ^ (x)->data[(x)->size - 6]) == 0xFF \
&& (((x)->data[(x)->size - 7] ^ (x)->data[(x)->size - 5]) == 0xFF \
&& (((x)->data[(x)->size - 3] ^ (x)->data[(x)->size - 4]) == 0xFF)))
#define FT_MAX_TRIES 5
#define FT_RETRY_DLY 20
#define FT_MAX_WR_BUF 10
#define FT_MAX_RD_BUF 2
#define FT_FW_PKT_LEN 128
#define FT_FW_PKT_META_LEN 6
#define FT_FW_PKT_DLY_MS 20
#define FT_FW_LAST_PKT 0x6ffa
#define FT_EARSE_DLY_MS 100
#define FT_UPGRADE_LOOP 3
#define FT_CAL_START 0x04
#define FT_CAL_FIN 0x00
#define FT_CAL_STORE 0x05
#define FT_CAL_RETRY 100
#define FT_REG_CAL 0x00
#define FT_CAL_MASK 0x70
#define FT_DEBUG_DIR_NAME "ft_debug"
struct ts_event {
u16 x[CFG_MAX_TOUCH_POINTS]; /*x coordinate */
u16 y[CFG_MAX_TOUCH_POINTS]; /*y coordinate */
/* touch event: 0 -- down; 1-- contact; 2 -- contact */
u8 touch_event[CFG_MAX_TOUCH_POINTS];
u8 finger_id[CFG_MAX_TOUCH_POINTS]; /*touch ID */
u16 pressure;
u8 touch_point;
};
struct upgrade_info {
u16 delay_aa; /*delay of write FT_UPGRADE_AA */
u16 delay_55; /*delay of write FT_UPGRADE_55 */
u8 upgrade_id_1; /*upgrade id 1 */
u8 upgrade_id_2; /*upgrade id 2 */
u16 delay_readid; /*delay of read id */
u16 delay_earse_flash; /*delay of earse flash*/
};
struct ft5x06_ts_data {
struct i2c_client *client;
struct input_dev *input_dev;
struct ts_event event;
const struct ft5x06_ts_platform_data *pdata;
struct regulator *vdd;
struct regulator *vcc_i2c;
char fw_name[FT_FW_NAME_MAX_LEN];
bool loading_fw;
u8 family_id;
struct dentry *dir;
u16 addr;
bool suspended;
#if defined(CONFIG_FB)
struct notifier_block fb_notif;
#elif defined(CONFIG_HAS_EARLYSUSPEND)
struct early_suspend early_suspend;
#endif
};
static int ft5x06_i2c_read(struct i2c_client *client, char *writebuf,
int writelen, char *readbuf, int readlen)
{
int ret;
if (writelen > 0) {
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = 0,
.len = writelen,
.buf = writebuf,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = readlen,
.buf = readbuf,
},
};
ret = i2c_transfer(client->adapter, msgs, 2);
if (ret < 0)
dev_err(&client->dev, "%s: i2c read error.\n",
__func__);
} else {
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = readlen,
.buf = readbuf,
},
};
ret = i2c_transfer(client->adapter, msgs, 1);
if (ret < 0)
dev_err(&client->dev, "%s:i2c read error.\n", __func__);
}
return ret;
}
static int ft5x06_i2c_write(struct i2c_client *client, char *writebuf,
int writelen)
{
int ret;
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = 0,
.len = writelen,
.buf = writebuf,
},
};
ret = i2c_transfer(client->adapter, msgs, 1);
if (ret < 0)
dev_err(&client->dev, "%s: i2c write error.\n", __func__);
return ret;
}
static int ft5x0x_write_reg(struct i2c_client *client, u8 addr, const u8 val)
{
u8 buf[2] = {0};
buf[0] = addr;
buf[1] = val;
return ft5x06_i2c_write(client, buf, sizeof(buf));
}
static int ft5x0x_read_reg(struct i2c_client *client, u8 addr, u8 *val)
{
return ft5x06_i2c_read(client, &addr, 1, val, 1);
}
static void ft5x06_report_value(struct ft5x06_ts_data *data)
{
struct ts_event *event = &data->event;
int i;
int fingerdown = 0;
for (i = 0; i < event->touch_point; i++) {
if (event->touch_event[i] == 0 || event->touch_event[i] == 2) {
event->pressure = FT_PRESS;
fingerdown++;
} else {
event->pressure = 0;
}
input_report_abs(data->input_dev, ABS_MT_POSITION_X,
event->x[i]);
input_report_abs(data->input_dev, ABS_MT_POSITION_Y,
event->y[i]);
input_report_abs(data->input_dev, ABS_MT_PRESSURE,
event->pressure);
input_report_abs(data->input_dev, ABS_MT_TRACKING_ID,
event->finger_id[i]);
input_report_abs(data->input_dev, ABS_MT_TOUCH_MAJOR,
event->pressure);
input_mt_sync(data->input_dev);
}
input_report_key(data->input_dev, BTN_TOUCH, !!fingerdown);
input_sync(data->input_dev);
}
static int ft5x06_handle_touchdata(struct ft5x06_ts_data *data)
{
struct ts_event *event = &data->event;
int ret, i;
u8 buf[POINT_READ_BUF] = { 0 };
u8 pointid = FT_MAX_ID;
ret = ft5x06_i2c_read(data->client, buf, 1, buf, POINT_READ_BUF);
if (ret < 0) {
dev_err(&data->client->dev, "%s read touchdata failed.\n",
__func__);
return ret;
}
memset(event, 0, sizeof(struct ts_event));
event->touch_point = 0;
for (i = 0; i < CFG_MAX_TOUCH_POINTS; i++) {
pointid = (buf[FT_TOUCH_ID_POS + FT_TOUCH_STEP * i]) >> 4;
if (pointid >= FT_MAX_ID)
break;
else
event->touch_point++;
event->x[i] =
(s16) (buf[FT_TOUCH_X_H_POS + FT_TOUCH_STEP * i] & 0x0F) <<
8 | (s16) buf[FT_TOUCH_X_L_POS + FT_TOUCH_STEP * i];
event->y[i] =
(s16) (buf[FT_TOUCH_Y_H_POS + FT_TOUCH_STEP * i] & 0x0F) <<
8 | (s16) buf[FT_TOUCH_Y_L_POS + FT_TOUCH_STEP * i];
event->touch_event[i] =
buf[FT_TOUCH_EVENT_POS + FT_TOUCH_STEP * i] >> 6;
event->finger_id[i] =
(buf[FT_TOUCH_ID_POS + FT_TOUCH_STEP * i]) >> 4;
}
ft5x06_report_value(data);
return 0;
}
static irqreturn_t ft5x06_ts_interrupt(int irq, void *dev_id)
{
struct ft5x06_ts_data *data = dev_id;
int rc;
rc = ft5x06_handle_touchdata(data);
if (rc)
pr_err("%s: handling touchdata failed\n", __func__);
return IRQ_HANDLED;
}
static int ft5x06_power_on(struct ft5x06_ts_data *data, bool on)
{
int rc;
if (!on)
goto power_off;
rc = regulator_enable(data->vdd);
if (rc) {
dev_err(&data->client->dev,
"Regulator vdd enable failed rc=%d\n", rc);
return rc;
}
rc = regulator_enable(data->vcc_i2c);
if (rc) {
dev_err(&data->client->dev,
"Regulator vcc_i2c enable failed rc=%d\n", rc);
regulator_disable(data->vdd);
}
return rc;
power_off:
rc = regulator_disable(data->vdd);
if (rc) {
dev_err(&data->client->dev,
"Regulator vdd disable failed rc=%d\n", rc);
return rc;
}
rc = regulator_disable(data->vcc_i2c);
if (rc) {
dev_err(&data->client->dev,
"Regulator vcc_i2c disable failed rc=%d\n", rc);
regulator_enable(data->vdd);
}
return rc;
}
static int ft5x06_power_init(struct ft5x06_ts_data *data, bool on)
{
int rc;
if (!on)
goto pwr_deinit;
data->vdd = regulator_get(&data->client->dev, "vdd");
if (IS_ERR(data->vdd)) {
rc = PTR_ERR(data->vdd);
dev_err(&data->client->dev,
"Regulator get failed vdd rc=%d\n", rc);
return rc;
}
if (regulator_count_voltages(data->vdd) > 0) {
rc = regulator_set_voltage(data->vdd, FT_VTG_MIN_UV,
FT_VTG_MAX_UV);
if (rc) {
dev_err(&data->client->dev,
"Regulator set_vtg failed vdd rc=%d\n", rc);
goto reg_vdd_put;
}
}
data->vcc_i2c = regulator_get(&data->client->dev, "vcc_i2c");
if (IS_ERR(data->vcc_i2c)) {
rc = PTR_ERR(data->vcc_i2c);
dev_err(&data->client->dev,
"Regulator get failed vcc_i2c rc=%d\n", rc);
goto reg_vdd_set_vtg;
}
if (regulator_count_voltages(data->vcc_i2c) > 0) {
rc = regulator_set_voltage(data->vcc_i2c, FT_I2C_VTG_MIN_UV,
FT_I2C_VTG_MAX_UV);
if (rc) {
dev_err(&data->client->dev,
"Regulator set_vtg failed vcc_i2c rc=%d\n", rc);
goto reg_vcc_i2c_put;
}
}
return 0;
reg_vcc_i2c_put:
regulator_put(data->vcc_i2c);
reg_vdd_set_vtg:
if (regulator_count_voltages(data->vdd) > 0)
regulator_set_voltage(data->vdd, 0, FT_VTG_MAX_UV);
reg_vdd_put:
regulator_put(data->vdd);
return rc;
pwr_deinit:
if (regulator_count_voltages(data->vdd) > 0)
regulator_set_voltage(data->vdd, 0, FT_VTG_MAX_UV);
regulator_put(data->vdd);
if (regulator_count_voltages(data->vcc_i2c) > 0)
regulator_set_voltage(data->vcc_i2c, 0, FT_I2C_VTG_MAX_UV);
regulator_put(data->vcc_i2c);
return 0;
}
#ifdef CONFIG_PM
static int ft5x06_ts_suspend(struct device *dev)
{
struct ft5x06_ts_data *data = dev_get_drvdata(dev);
char txbuf[2];
if (data->loading_fw) {
dev_info(dev, "Firmware loading in process...\n");
return 0;
}
if (data->suspended) {
dev_info(dev, "Already in suspend state\n");
return 0;
}
disable_irq(data->client->irq);
if (gpio_is_valid(data->pdata->reset_gpio)) {
txbuf[0] = FT_REG_PMODE;
txbuf[1] = FT_PMODE_HIBERNATE;
ft5x06_i2c_write(data->client, txbuf, sizeof(txbuf));
}
data->suspended = true;
return 0;
}
static int ft5x06_ts_resume(struct device *dev)
{
struct ft5x06_ts_data *data = dev_get_drvdata(dev);
if (!data->suspended) {
dev_info(dev, "Already in awake state\n");
return 0;
}
if (gpio_is_valid(data->pdata->reset_gpio)) {
gpio_set_value_cansleep(data->pdata->reset_gpio, 0);
msleep(FT_RESET_DLY);
gpio_set_value_cansleep(data->pdata->reset_gpio, 1);
}
enable_irq(data->client->irq);
data->suspended = false;
return 0;
}
#if defined(CONFIG_FB)
static int fb_notifier_callback(struct notifier_block *self,
unsigned long event, void *data)
{
struct fb_event *evdata = data;
int *blank;
struct ft5x06_ts_data *ft5x06_data =
container_of(self, struct ft5x06_ts_data, fb_notif);
if (evdata && evdata->data && event == FB_EVENT_BLANK &&
ft5x06_data && ft5x06_data->client) {
blank = evdata->data;
if (*blank == FB_BLANK_UNBLANK)
ft5x06_ts_resume(&ft5x06_data->client->dev);
else if (*blank == FB_BLANK_POWERDOWN)
ft5x06_ts_suspend(&ft5x06_data->client->dev);
}
return 0;
}
#elif defined(CONFIG_HAS_EARLYSUSPEND)
static void ft5x06_ts_early_suspend(struct early_suspend *handler)
{
struct ft5x06_ts_data *data = container_of(handler,
struct ft5x06_ts_data,
early_suspend);
ft5x06_ts_suspend(&data->client->dev);
}
static void ft5x06_ts_late_resume(struct early_suspend *handler)
{
struct ft5x06_ts_data *data = container_of(handler,
struct ft5x06_ts_data,
early_suspend);
ft5x06_ts_resume(&data->client->dev);
}
#endif
static const struct dev_pm_ops ft5x06_ts_pm_ops = {
#if (!defined(CONFIG_FB) && !defined(CONFIG_HAS_EARLYSUSPEND))
.suspend = ft5x06_ts_suspend,
.resume = ft5x06_ts_resume,
#endif
};
#endif
static int ft5x06_auto_cal(struct i2c_client *client)
{
u8 temp = 0, i;
/* set to factory mode */
msleep(2 * FT_STARTUP_DLY);
ft5x0x_write_reg(client, FT_REG_DEV_MODE, FT_FACTORYMODE_VALUE);
msleep(FT_STARTUP_DLY);
/* start calibration */
ft5x0x_write_reg(client, FT_DEV_MODE_REG_CAL, FT_CAL_START);
msleep(2 * FT_STARTUP_DLY);
for (i = 0; i < FT_CAL_RETRY; i++) {
ft5x0x_read_reg(client, FT_REG_CAL, &temp);
/*return to normal mode, calibration finish */
if (((temp & FT_CAL_MASK) >> FT_4BIT_SHIFT) == FT_CAL_FIN)
break;
}
/*calibration OK */
msleep(2 * FT_STARTUP_DLY);
ft5x0x_write_reg(client, FT_REG_DEV_MODE, FT_FACTORYMODE_VALUE);
msleep(FT_STARTUP_DLY);
/* store calibration data */
ft5x0x_write_reg(client, FT_DEV_MODE_REG_CAL, FT_CAL_STORE);
msleep(2 * FT_STARTUP_DLY);
/* set to normal mode */
ft5x0x_write_reg(client, FT_REG_DEV_MODE, FT_WORKMODE_VALUE);
msleep(2 * FT_STARTUP_DLY);
return 0;
}
static int ft5x06_get_upgrade_info(u8 family_id, struct upgrade_info *info)
{
switch (family_id) {
case FT5306I_ID:
FT_UPGRADE_INFO(info, FT5X06);
break;
case FT5316_ID:
FT_UPGRADE_INFO(info, FT5316);
break;
default:
return -EINVAL;
}
return 0;
}
static int ft5x06_fw_upgrade_start(struct i2c_client *client,
const u8 *data, u32 data_len)
{
struct ft5x06_ts_data *ts_data = i2c_get_clientdata(client);
struct upgrade_info info;
u8 w_buf[FT_MAX_WR_BUF] = {0}, r_buf[FT_MAX_RD_BUF] = {0};
u8 pkt_buf[FT_FW_PKT_LEN + FT_FW_PKT_META_LEN];
int rc, i, j, temp;
u32 pkt_num, pkt_len;
u8 fw_ecc;
rc = ft5x06_get_upgrade_info(ts_data->family_id, &info);
if (rc < 0) {
dev_err(&client->dev, "Cannot get upgrade information!\n");
return -EINVAL;
}
for (i = 0; i < FT_UPGRADE_LOOP; i++) {
/* reset - write 0xaa and 0x55 to register 0xfc */
ft5x0x_write_reg(client, FT_RST_CMD_REG, FT_UPGRADE_AA);
msleep(info.delay_aa);
ft5x0x_write_reg(client, FT_RST_CMD_REG, FT_UPGRADE_55);
msleep(info.delay_55);
/* Enter upgrade mode */
w_buf[0] = FT_UPGRADE_55;
w_buf[1] = FT_UPGRADE_AA;
do {
i++;
rc = ft5x06_i2c_write(client, w_buf, 2);
msleep(FT_RETRY_DLY);
} while (rc <= 0 && i < FT_MAX_TRIES);
/* check READ_ID */
msleep(info.delay_readid);
w_buf[0] = FT_READ_ID_REG;
w_buf[1] = 0x00;
w_buf[2] = 0x00;
w_buf[3] = 0x00;
ft5x06_i2c_read(client, w_buf, 4, r_buf, 2);
if (r_buf[0] != info.upgrade_id_1
|| r_buf[1] != info.upgrade_id_2) {
dev_err(&client->dev, "Upgrade ID mismatch(%d)\n", i);
} else
break;
}
if (i >= FT_UPGRADE_LOOP) {
dev_err(&client->dev, "Abort upgrade\n");
return -EIO;
}
/* erase app and panel paramenter area */
w_buf[0] = FT_ERASE_APP_REG;
ft5x06_i2c_write(client, w_buf, 1);
msleep(info.delay_earse_flash);
w_buf[0] = FT_ERASE_PANEL_REG;
ft5x06_i2c_write(client, w_buf, 1);
msleep(FT_EARSE_DLY_MS);
/* program firmware */
data_len = data_len - 8;
pkt_num = (data_len) / FT_FW_PKT_LEN;
pkt_len = FT_FW_PKT_LEN;
pkt_buf[0] = FT_FW_START_REG;
pkt_buf[1] = 0x00;
fw_ecc = 0;
for (i = 0; i < pkt_num; i++) {
temp = i * FT_FW_PKT_LEN;
pkt_buf[2] = (u8) (temp >> FT_8BIT_SHIFT);
pkt_buf[3] = (u8) temp;
pkt_buf[4] = (u8) (pkt_len >> FT_8BIT_SHIFT);
pkt_buf[5] = (u8) pkt_len;
for (j = 0; j < FT_FW_PKT_LEN; j++) {
pkt_buf[6 + j] = data[i * FT_FW_PKT_LEN + j];
fw_ecc ^= pkt_buf[6 + j];
}
ft5x06_i2c_write(client, pkt_buf,
FT_FW_PKT_LEN + FT_FW_PKT_META_LEN);
msleep(FT_FW_PKT_DLY_MS);
}
/* send remaining bytes */
if ((data_len) % FT_FW_PKT_LEN > 0) {
temp = pkt_num * FT_FW_PKT_LEN;
pkt_buf[2] = (u8) (temp >> FT_8BIT_SHIFT);
pkt_buf[3] = (u8) temp;
temp = (data_len) % FT_FW_PKT_LEN;
pkt_buf[4] = (u8) (temp >> FT_8BIT_SHIFT);
pkt_buf[5] = (u8) temp;
for (i = 0; i < temp; i++) {
pkt_buf[6 + i] = data[pkt_num * FT_FW_PKT_LEN + i];
fw_ecc ^= pkt_buf[6 + i];
}
ft5x06_i2c_write(client, pkt_buf, temp + FT_FW_PKT_META_LEN);
msleep(FT_FW_PKT_DLY_MS);
}
/* send the finishing packet */
for (i = 0; i < 6; i++) {
temp = FT_FW_LAST_PKT + i;
pkt_buf[2] = (u8) (temp >> 8);
pkt_buf[3] = (u8) temp;
temp = 1;
pkt_buf[4] = (u8) (temp >> 8);
pkt_buf[5] = (u8) temp;
pkt_buf[6] = data[data_len + i];
fw_ecc ^= pkt_buf[6];
ft5x06_i2c_write(client, pkt_buf, temp + FT_FW_PKT_META_LEN);
msleep(FT_FW_PKT_DLY_MS);
}
/* verify checksum */
w_buf[0] = FT_REG_ECC;
ft5x06_i2c_read(client, w_buf, 1, r_buf, 1);
if (r_buf[0] != fw_ecc) {
dev_err(&client->dev, "ECC error! dev_ecc=%02x fw_ecc=%02x\n",
r_buf[0], fw_ecc);
return -EIO;
}
/* reset */
w_buf[0] = FT_REG_RESET_FW;
ft5x06_i2c_write(client, w_buf, 1);
msleep(FT_STARTUP_DLY);
return 0;
}
static int ft5x06_fw_upgrade(struct device *dev, bool force)
{
struct ft5x06_ts_data *data = dev_get_drvdata(dev);
const struct firmware *fw = NULL;
int rc;
u8 val = 0;
rc = request_firmware(&fw, data->fw_name, dev);
if (rc < 0) {
dev_err(dev, "Request firmware failed - %s (%d)\n",
data->fw_name, rc);
return rc;
}
if (fw->size < FT_FW_MIN_SIZE || fw->size > FT_FW_MAX_SIZE) {
dev_err(dev, "Invalid firmware size (%d)\n", fw->size);
rc = -EIO;
goto rel_fw;
}
/* check firmware version */
rc = ft5x0x_read_reg(data->client, FT_REG_FW_VER, &val);
if (rc < 0) {
dev_err(dev, "Get firmware version failed\n");
goto rel_fw;
}
if (val == FT_FW_FILE_VER(fw) && !force) {
dev_err(dev, "No need to update (0x%x)\n", val);
rc = -EFAULT;
goto rel_fw;
}
dev_info(dev, "upgrade to fw ver 0x%x from 0x%x\n",
FT_FW_FILE_VER(fw), val);
/* start firmware upgrade */
if (FT_FW_CHECK(fw)) {
rc = ft5x06_fw_upgrade_start(data->client, fw->data, fw->size);
if (rc < 0)
dev_err(dev, "update failed (%d)\n", rc);
else
ft5x06_auto_cal(data->client);
} else {
dev_err(dev, "FW format error\n");
rc = -EIO;
}
rel_fw:
release_firmware(fw);
return rc;
}
static ssize_t ft5x06_update_fw_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ft5x06_ts_data *data = dev_get_drvdata(dev);
return snprintf(buf, 2, "%d\n", data->loading_fw);
}
static ssize_t ft5x06_update_fw_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct ft5x06_ts_data *data = dev_get_drvdata(dev);
unsigned long val;
int rc;
if (size > 2)
return -EINVAL;
rc = kstrtoul(buf, 10, &val);
if (rc != 0)
return rc;
mutex_lock(&data->input_dev->mutex);
if (!data->loading_fw && val) {
data->loading_fw = true;
ft5x06_fw_upgrade(dev, false);
data->loading_fw = false;
}
mutex_unlock(&data->input_dev->mutex);
return size;
}
static DEVICE_ATTR(update_fw, 0664, ft5x06_update_fw_show,
ft5x06_update_fw_store);
static ssize_t ft5x06_force_update_fw_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct ft5x06_ts_data *data = dev_get_drvdata(dev);
unsigned long val;
int rc;
if (size > 2)
return -EINVAL;
rc = kstrtoul(buf, 10, &val);
if (rc != 0)
return rc;
mutex_lock(&data->input_dev->mutex);
if (!data->loading_fw && val) {
data->loading_fw = true;
ft5x06_fw_upgrade(dev, true);
data->loading_fw = false;
}
mutex_unlock(&data->input_dev->mutex);
return size;
}
static DEVICE_ATTR(force_update_fw, 0664, ft5x06_update_fw_show,
ft5x06_force_update_fw_store);
static ssize_t ft5x06_fw_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ft5x06_ts_data *data = dev_get_drvdata(dev);
return snprintf(buf, FT_FW_NAME_MAX_LEN - 1, "%s\n", data->fw_name);
}
static ssize_t ft5x06_fw_name_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct ft5x06_ts_data *data = dev_get_drvdata(dev);
if (size > FT_FW_NAME_MAX_LEN - 1)
return -EINVAL;
strlcpy(data->fw_name, buf, size);
if (data->fw_name[size-1] == '\n')
data->fw_name[size-1] = 0;
return size;
}
static DEVICE_ATTR(fw_name, 0664, ft5x06_fw_name_show, ft5x06_fw_name_store);
static bool ft5x06_debug_addr_is_valid(int addr)
{
if (addr < 0 || addr > 0xFF) {
pr_err("FT reg address is invalid: 0x%x\n", addr);
return false;
}
return true;
}
static int ft5x06_debug_data_set(void *_data, u64 val)
{
struct ft5x06_ts_data *data = _data;
mutex_lock(&data->input_dev->mutex);
if (ft5x06_debug_addr_is_valid(data->addr))
dev_info(&data->client->dev,
"Writing into FT registers not supported\n");
mutex_unlock(&data->input_dev->mutex);
return 0;
}
static int ft5x06_debug_data_get(void *_data, u64 *val)
{
struct ft5x06_ts_data *data = _data;
int rc;
u8 reg;
mutex_lock(&data->input_dev->mutex);
if (ft5x06_debug_addr_is_valid(data->addr)) {
rc = ft5x0x_read_reg(data->client, data->addr, &reg);
if (rc < 0)
dev_err(&data->client->dev,
"FT read register 0x%x failed (%d)\n",
data->addr, rc);
else
*val = reg;
}
mutex_unlock(&data->input_dev->mutex);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(debug_data_fops, ft5x06_debug_data_get,
ft5x06_debug_data_set, "0x%02llX\n");
static int ft5x06_debug_addr_set(void *_data, u64 val)
{
struct ft5x06_ts_data *data = _data;
if (ft5x06_debug_addr_is_valid(val)) {
mutex_lock(&data->input_dev->mutex);
data->addr = val;
mutex_unlock(&data->input_dev->mutex);
}
return 0;
}
static int ft5x06_debug_addr_get(void *_data, u64 *val)
{
struct ft5x06_ts_data *data = _data;
mutex_lock(&data->input_dev->mutex);
if (ft5x06_debug_addr_is_valid(data->addr))
*val = data->addr;
mutex_unlock(&data->input_dev->mutex);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(debug_addr_fops, ft5x06_debug_addr_get,
ft5x06_debug_addr_set, "0x%02llX\n");
static int ft5x06_debug_suspend_set(void *_data, u64 val)
{
struct ft5x06_ts_data *data = _data;
mutex_lock(&data->input_dev->mutex);
if (val)
ft5x06_ts_suspend(&data->client->dev);
else
ft5x06_ts_resume(&data->client->dev);
mutex_unlock(&data->input_dev->mutex);
return 0;
}
static int ft5x06_debug_suspend_get(void *_data, u64 *val)
{
struct ft5x06_ts_data *data = _data;
mutex_lock(&data->input_dev->mutex);
*val = data->suspended;
mutex_unlock(&data->input_dev->mutex);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(debug_suspend_fops, ft5x06_debug_suspend_get,
ft5x06_debug_suspend_set, "%lld\n");
#ifdef CONFIG_OF
static int ft5x06_get_dt_coords(struct device *dev, char *name,
struct ft5x06_ts_platform_data *pdata)
{
u32 coords[FT_COORDS_ARR_SIZE];
struct property *prop;
struct device_node *np = dev->of_node;
int coords_size, rc;
prop = of_find_property(np, name, NULL);
if (!prop)
return -EINVAL;
if (!prop->value)
return -ENODATA;
coords_size = prop->length / sizeof(u32);
if (coords_size != FT_COORDS_ARR_SIZE) {
dev_err(dev, "invalid %s\n", name);
return -EINVAL;
}
rc = of_property_read_u32_array(np, name, coords, coords_size);
if (rc && (rc != -EINVAL)) {
dev_err(dev, "Unable to read %s\n", name);
return rc;
}
if (!strcmp(name, "focaltech,panel-coords")) {
pdata->panel_minx = coords[0];
pdata->panel_miny = coords[1];
pdata->panel_maxx = coords[2];
pdata->panel_maxy = coords[3];
} else if (!strcmp(name, "focaltech,display-coords")) {
pdata->x_min = coords[0];
pdata->y_min = coords[1];
pdata->x_max = coords[2];
pdata->y_max = coords[3];
} else {
dev_err(dev, "unsupported property %s\n", name);
return -EINVAL;
}
return 0;
}
static int ft5x06_parse_dt(struct device *dev,
struct ft5x06_ts_platform_data *pdata)
{
int rc;
struct device_node *np = dev->of_node;
struct property *prop;
u32 temp_val, num_buttons;
u32 button_map[MAX_BUTTONS];
rc = ft5x06_get_dt_coords(dev, "focaltech,panel-coords", pdata);
if (rc && (rc != -EINVAL))
return rc;
rc = ft5x06_get_dt_coords(dev, "focaltech,display-coords", pdata);
if (rc)
return rc;
pdata->i2c_pull_up = of_property_read_bool(np,
"focaltech,i2c-pull-up");
pdata->no_force_update = of_property_read_bool(np,
"focaltech,no-force-update");
/* reset, irq gpio info */
pdata->reset_gpio = of_get_named_gpio_flags(np, "focaltech,reset-gpio",
0, &pdata->reset_gpio_flags);
if (pdata->reset_gpio < 0)
return pdata->reset_gpio;
pdata->irq_gpio = of_get_named_gpio_flags(np, "focaltech,irq-gpio",
0, &pdata->irq_gpio_flags);
if (pdata->irq_gpio < 0)
return pdata->irq_gpio;
rc = of_property_read_u32(np, "focaltech,family-id", &temp_val);
if (!rc)
pdata->family_id = temp_val;
else
return rc;
prop = of_find_property(np, "focaltech,button-map", NULL);
if (prop) {
num_buttons = prop->length / sizeof(temp_val);
if (num_buttons > MAX_BUTTONS)
return -EINVAL;
rc = of_property_read_u32_array(np,
"focaltech,button-map", button_map,
num_buttons);
if (rc) {
dev_err(dev, "Unable to read key codes\n");
return rc;
}
}
return 0;
}
#else
static int ft5x06_parse_dt(struct device *dev,
struct ft5x06_ts_platform_data *pdata)
{
return -ENODEV;
}
#endif
static int ft5x06_ts_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct ft5x06_ts_platform_data *pdata;
struct ft5x06_ts_data *data;
struct input_dev *input_dev;
struct dentry *dir, *temp;
u8 reg_value;
u8 reg_addr;
int err;
if (client->dev.of_node) {
pdata = devm_kzalloc(&client->dev,
sizeof(struct ft5x06_ts_platform_data), GFP_KERNEL);
if (!pdata) {
dev_err(&client->dev, "Failed to allocate memory\n");
return -ENOMEM;
}
err = ft5x06_parse_dt(&client->dev, pdata);
if (err)
return err;
} else
pdata = client->dev.platform_data;
if (!pdata) {
dev_err(&client->dev, "Invalid pdata\n");
return -EINVAL;
}
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "I2C not supported\n");
return -ENODEV;
}
data = kzalloc(sizeof(struct ft5x06_ts_data), GFP_KERNEL);
if (!data) {
dev_err(&client->dev, "Not enough memory\n");
return -ENOMEM;
}
input_dev = input_allocate_device();
if (!input_dev) {
err = -ENOMEM;
dev_err(&client->dev, "failed to allocate input device\n");
goto free_mem;
}
data->input_dev = input_dev;
data->client = client;
data->pdata = pdata;
input_dev->name = "ft5x06_ts";
input_dev->id.bustype = BUS_I2C;
input_dev->dev.parent = &client->dev;
input_set_drvdata(input_dev, data);
i2c_set_clientdata(client, data);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
__set_bit(INPUT_PROP_DIRECT, input_dev->propbit);
input_set_abs_params(input_dev, ABS_MT_POSITION_X, pdata->x_min,
pdata->x_max, 0, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_Y, pdata->y_min,
pdata->y_max, 0, 0);
input_set_abs_params(input_dev, ABS_MT_TRACKING_ID, 0,
CFG_MAX_TOUCH_POINTS, 0, 0);
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, FT_PRESS, 0, 0);
input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, FT_PRESS, 0, 0);
err = input_register_device(input_dev);
if (err) {
dev_err(&client->dev, "Input device registration failed\n");
goto free_inputdev;
}
if (pdata->power_init) {
err = pdata->power_init(true);
if (err) {
dev_err(&client->dev, "power init failed");
goto unreg_inputdev;
}
} else {
err = ft5x06_power_init(data, true);
if (err) {
dev_err(&client->dev, "power init failed");
goto unreg_inputdev;
}
}
if (pdata->power_on) {
err = pdata->power_on(true);
if (err) {
dev_err(&client->dev, "power on failed");
goto pwr_deinit;
}
} else {
err = ft5x06_power_on(data, true);
if (err) {
dev_err(&client->dev, "power on failed");
goto pwr_deinit;
}
}
if (gpio_is_valid(pdata->irq_gpio)) {
err = gpio_request(pdata->irq_gpio, "ft5x06_irq_gpio");
if (err) {
dev_err(&client->dev, "irq gpio request failed");
goto pwr_off;
}
err = gpio_direction_input(pdata->irq_gpio);
if (err) {
dev_err(&client->dev,
"set_direction for irq gpio failed\n");
goto free_irq_gpio;
}
}
if (gpio_is_valid(pdata->reset_gpio)) {
err = gpio_request(pdata->reset_gpio, "ft5x06_reset_gpio");
if (err) {
dev_err(&client->dev, "reset gpio request failed");
goto free_irq_gpio;
}
err = gpio_direction_output(pdata->reset_gpio, 0);
if (err) {
dev_err(&client->dev,
"set_direction for reset gpio failed\n");
goto free_reset_gpio;
}
msleep(FT_RESET_DLY);
gpio_set_value_cansleep(data->pdata->reset_gpio, 1);
}
/* make sure CTP already finish startup process */
msleep(FT_STARTUP_DLY);
/* check the controller id */
reg_addr = FT_REG_ID;
err = ft5x06_i2c_read(client, &reg_addr, 1, &reg_value, 1);
if (err < 0) {
dev_err(&client->dev, "version read failed");
return err;
}
dev_info(&client->dev, "Device ID = 0x%x\n", reg_value);
if (pdata->family_id != reg_value) {
dev_err(&client->dev, "%s:Unsupported controller\n", __func__);
goto free_reset_gpio;
}
data->family_id = reg_value;
/*get some register information */
reg_addr = FT_REG_FW_VER;
err = ft5x06_i2c_read(client, &reg_addr, 1, &reg_value, 1);
if (err < 0)
dev_err(&client->dev, "version read failed");
dev_info(&client->dev, "Firmware version = 0x%x\n", reg_value);
reg_addr = FT_REG_POINT_RATE;
ft5x06_i2c_read(client, &reg_addr, 1, &reg_value, 1);
if (err < 0)
dev_err(&client->dev, "report rate read failed");
dev_info(&client->dev, "report rate = %dHz\n", reg_value * 10);
reg_addr = FT_REG_THGROUP;
err = ft5x06_i2c_read(client, &reg_addr, 1, &reg_value, 1);
if (err < 0)
dev_err(&client->dev, "threshold read failed");
dev_dbg(&client->dev, "touch threshold = %d\n", reg_value * 4);
err = request_threaded_irq(client->irq, NULL,
ft5x06_ts_interrupt, pdata->irqflags,
client->dev.driver->name, data);
if (err) {
dev_err(&client->dev, "request irq failed\n");
goto free_reset_gpio;
}
err = device_create_file(&client->dev, &dev_attr_fw_name);
if (err) {
dev_err(&client->dev, "sys file creation failed\n");
goto irq_free;
}
err = device_create_file(&client->dev, &dev_attr_update_fw);
if (err) {
dev_err(&client->dev, "sys file creation failed\n");
goto free_fw_name_sys;
}
err = device_create_file(&client->dev, &dev_attr_force_update_fw);
if (err) {
dev_err(&client->dev, "sys file creation failed\n");
goto free_update_fw_sys;
}
dir = debugfs_create_dir(FT_DEBUG_DIR_NAME, NULL);
if (dir == NULL || IS_ERR(dir)) {
pr_err("debugfs_create_dir failed: rc=%ld\n", PTR_ERR(dir));
err = PTR_ERR(dir);
goto free_force_update_fw_sys;
}
temp = debugfs_create_file("addr", S_IRUSR | S_IWUSR, dir, data,
&debug_addr_fops);
if (temp == NULL || IS_ERR(temp)) {
pr_err("debugfs_create_file failed: rc=%ld\n", PTR_ERR(temp));
err = PTR_ERR(temp);
goto free_debug_dir;
}
temp = debugfs_create_file("data", S_IRUSR | S_IWUSR, dir, data,
&debug_data_fops);
if (temp == NULL || IS_ERR(temp)) {
pr_err("debugfs_create_file failed: rc=%ld\n", PTR_ERR(temp));
err = PTR_ERR(temp);
goto free_debug_dir;
}
temp = debugfs_create_file("suspend", S_IRUSR | S_IWUSR, dir, data,
&debug_suspend_fops);
if (temp == NULL || IS_ERR(temp)) {
pr_err("debugfs_create_file failed: rc=%ld\n", PTR_ERR(temp));
err = PTR_ERR(temp);
goto free_debug_dir;
}
#if defined(CONFIG_FB)
data->fb_notif.notifier_call = fb_notifier_callback;
err = fb_register_client(&data->fb_notif);
if (err)
dev_err(&client->dev, "Unable to register fb_notifier: %d\n",
err);
#elif defined(CONFIG_HAS_EARLYSUSPEND)
data->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN +
FT_SUSPEND_LEVEL;
data->early_suspend.suspend = ft5x06_ts_early_suspend;
data->early_suspend.resume = ft5x06_ts_late_resume;
register_early_suspend(&data->early_suspend);
#endif
return 0;
free_debug_dir:
debugfs_remove_recursive(data->dir);
free_force_update_fw_sys:
device_remove_file(&client->dev, &dev_attr_force_update_fw);
free_update_fw_sys:
device_remove_file(&client->dev, &dev_attr_update_fw);
free_fw_name_sys:
device_remove_file(&client->dev, &dev_attr_fw_name);
irq_free:
free_irq(client->irq, data);
free_reset_gpio:
if (gpio_is_valid(pdata->reset_gpio))
gpio_free(pdata->reset_gpio);
free_irq_gpio:
if (gpio_is_valid(pdata->irq_gpio))
gpio_free(pdata->irq_gpio);
pwr_off:
if (pdata->power_on)
pdata->power_on(false);
else
ft5x06_power_on(data, false);
pwr_deinit:
if (pdata->power_init)
pdata->power_init(false);
else
ft5x06_power_init(data, false);
unreg_inputdev:
input_unregister_device(input_dev);
input_dev = NULL;
free_inputdev:
input_free_device(input_dev);
free_mem:
kfree(data);
return err;
}
static int __devexit ft5x06_ts_remove(struct i2c_client *client)
{
struct ft5x06_ts_data *data = i2c_get_clientdata(client);
debugfs_remove_recursive(data->dir);
device_remove_file(&client->dev, &dev_attr_force_update_fw);
device_remove_file(&client->dev, &dev_attr_update_fw);
device_remove_file(&client->dev, &dev_attr_fw_name);
#if defined(CONFIG_FB)
if (fb_unregister_client(&data->fb_notif))
dev_err(&client->dev, "Error occurred while unregistering fb_notifier.\n");
#elif defined(CONFIG_HAS_EARLYSUSPEND)
unregister_early_suspend(&data->early_suspend);
#endif
free_irq(client->irq, data);
if (gpio_is_valid(data->pdata->reset_gpio))
gpio_free(data->pdata->reset_gpio);
if (gpio_is_valid(data->pdata->irq_gpio))
gpio_free(data->pdata->irq_gpio);
if (data->pdata->power_on)
data->pdata->power_on(false);
else
ft5x06_power_on(data, false);
if (data->pdata->power_init)
data->pdata->power_init(false);
else
ft5x06_power_init(data, false);
input_unregister_device(data->input_dev);
kfree(data);
return 0;
}
static const struct i2c_device_id ft5x06_ts_id[] = {
{"ft5x06_ts", 0},
{},
};
MODULE_DEVICE_TABLE(i2c, ft5x06_ts_id);
#ifdef CONFIG_OF
static struct of_device_id ft5x06_match_table[] = {
{ .compatible = "focaltech,5x06",},
{ },
};
#else
#define ft5x06_match_table NULL
#endif
static struct i2c_driver ft5x06_ts_driver = {
.probe = ft5x06_ts_probe,
.remove = __devexit_p(ft5x06_ts_remove),
.driver = {
.name = "ft5x06_ts",
.owner = THIS_MODULE,
.of_match_table = ft5x06_match_table,
#ifdef CONFIG_PM
.pm = &ft5x06_ts_pm_ops,
#endif
},
.id_table = ft5x06_ts_id,
};
static int __init ft5x06_ts_init(void)
{
return i2c_add_driver(&ft5x06_ts_driver);
}
module_init(ft5x06_ts_init);
static void __exit ft5x06_ts_exit(void)
{
i2c_del_driver(&ft5x06_ts_driver);
}
module_exit(ft5x06_ts_exit);
MODULE_DESCRIPTION("FocalTech ft5x06 TouchScreen driver");
MODULE_LICENSE("GPL v2");