/* * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #if defined(CONFIG_FB) #include #include #elif defined(CONFIG_HAS_EARLYSUSPEND) #include /* 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, ®); 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, ®_addr, 1, ®_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, ®_addr, 1, ®_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, ®_addr, 1, ®_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, ®_addr, 1, ®_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");