| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Driver for Goodix Touchscreens |
| * |
| * Copyright (c) 2014 Red Hat Inc. |
| * Copyright (c) 2015 K. Merker <merker@debian.org> |
| * |
| * This code is based on gt9xx.c authored by andrew@goodix.com: |
| * |
| * 2010 - 2012 Goodix Technology. |
| */ |
| |
| |
| #include <linux/kernel.h> |
| #include <linux/dmi.h> |
| #include <linux/firmware.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/i2c.h> |
| #include <linux/input.h> |
| #include <linux/input/mt.h> |
| #include <linux/input/touchscreen.h> |
| #include <linux/module.h> |
| #include <linux/delay.h> |
| #include <linux/irq.h> |
| #include <linux/interrupt.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/slab.h> |
| #include <linux/acpi.h> |
| #include <linux/of.h> |
| #include <asm/unaligned.h> |
| |
| #define GOODIX_GPIO_INT_NAME "irq" |
| #define GOODIX_GPIO_RST_NAME "reset" |
| |
| #define GOODIX_MAX_HEIGHT 4096 |
| #define GOODIX_MAX_WIDTH 4096 |
| #define GOODIX_INT_TRIGGER 1 |
| #define GOODIX_CONTACT_SIZE 8 |
| #define GOODIX_MAX_CONTACT_SIZE 9 |
| #define GOODIX_MAX_CONTACTS 10 |
| #define GOODIX_MAX_KEYS 7 |
| |
| #define GOODIX_CONFIG_MIN_LENGTH 186 |
| #define GOODIX_CONFIG_911_LENGTH 186 |
| #define GOODIX_CONFIG_967_LENGTH 228 |
| #define GOODIX_CONFIG_GT9X_LENGTH 240 |
| #define GOODIX_CONFIG_MAX_LENGTH 240 |
| |
| /* Register defines */ |
| #define GOODIX_REG_COMMAND 0x8040 |
| #define GOODIX_CMD_SCREEN_OFF 0x05 |
| |
| #define GOODIX_READ_COOR_ADDR 0x814E |
| #define GOODIX_GT1X_REG_CONFIG_DATA 0x8050 |
| #define GOODIX_GT9X_REG_CONFIG_DATA 0x8047 |
| #define GOODIX_REG_ID 0x8140 |
| |
| #define GOODIX_BUFFER_STATUS_READY BIT(7) |
| #define GOODIX_HAVE_KEY BIT(4) |
| #define GOODIX_BUFFER_STATUS_TIMEOUT 20 |
| |
| #define RESOLUTION_LOC 1 |
| #define MAX_CONTACTS_LOC 5 |
| #define TRIGGER_LOC 6 |
| |
| /* Our special handling for GPIO accesses through ACPI is x86 specific */ |
| #if defined CONFIG_X86 && defined CONFIG_ACPI |
| #define ACPI_GPIO_SUPPORT |
| #endif |
| |
| struct goodix_ts_data; |
| |
| enum goodix_irq_pin_access_method { |
| IRQ_PIN_ACCESS_NONE, |
| IRQ_PIN_ACCESS_GPIO, |
| IRQ_PIN_ACCESS_ACPI_GPIO, |
| IRQ_PIN_ACCESS_ACPI_METHOD, |
| }; |
| |
| struct goodix_chip_data { |
| u16 config_addr; |
| int config_len; |
| int (*check_config)(struct goodix_ts_data *ts, const u8 *cfg, int len); |
| void (*calc_config_checksum)(struct goodix_ts_data *ts); |
| }; |
| |
| struct goodix_chip_id { |
| const char *id; |
| const struct goodix_chip_data *data; |
| }; |
| |
| #define GOODIX_ID_MAX_LEN 4 |
| |
| struct goodix_ts_data { |
| struct i2c_client *client; |
| struct input_dev *input_dev; |
| const struct goodix_chip_data *chip; |
| struct touchscreen_properties prop; |
| unsigned int max_touch_num; |
| unsigned int int_trigger_type; |
| struct regulator *avdd28; |
| struct regulator *vddio; |
| struct gpio_desc *gpiod_int; |
| struct gpio_desc *gpiod_rst; |
| int gpio_count; |
| int gpio_int_idx; |
| char id[GOODIX_ID_MAX_LEN + 1]; |
| u16 version; |
| const char *cfg_name; |
| bool reset_controller_at_probe; |
| bool load_cfg_from_disk; |
| struct completion firmware_loading_complete; |
| unsigned long irq_flags; |
| enum goodix_irq_pin_access_method irq_pin_access_method; |
| unsigned int contact_size; |
| u8 config[GOODIX_CONFIG_MAX_LENGTH]; |
| unsigned short keymap[GOODIX_MAX_KEYS]; |
| }; |
| |
| static int goodix_check_cfg_8(struct goodix_ts_data *ts, |
| const u8 *cfg, int len); |
| static int goodix_check_cfg_16(struct goodix_ts_data *ts, |
| const u8 *cfg, int len); |
| static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts); |
| static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts); |
| |
| static const struct goodix_chip_data gt1x_chip_data = { |
| .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, |
| .config_len = GOODIX_CONFIG_GT9X_LENGTH, |
| .check_config = goodix_check_cfg_16, |
| .calc_config_checksum = goodix_calc_cfg_checksum_16, |
| }; |
| |
| static const struct goodix_chip_data gt911_chip_data = { |
| .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, |
| .config_len = GOODIX_CONFIG_911_LENGTH, |
| .check_config = goodix_check_cfg_8, |
| .calc_config_checksum = goodix_calc_cfg_checksum_8, |
| }; |
| |
| static const struct goodix_chip_data gt967_chip_data = { |
| .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, |
| .config_len = GOODIX_CONFIG_967_LENGTH, |
| .check_config = goodix_check_cfg_8, |
| .calc_config_checksum = goodix_calc_cfg_checksum_8, |
| }; |
| |
| static const struct goodix_chip_data gt9x_chip_data = { |
| .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, |
| .config_len = GOODIX_CONFIG_GT9X_LENGTH, |
| .check_config = goodix_check_cfg_8, |
| .calc_config_checksum = goodix_calc_cfg_checksum_8, |
| }; |
| |
| static const struct goodix_chip_id goodix_chip_ids[] = { |
| { .id = "1151", .data = >1x_chip_data }, |
| { .id = "5663", .data = >1x_chip_data }, |
| { .id = "5688", .data = >1x_chip_data }, |
| { .id = "917S", .data = >1x_chip_data }, |
| |
| { .id = "911", .data = >911_chip_data }, |
| { .id = "9271", .data = >911_chip_data }, |
| { .id = "9110", .data = >911_chip_data }, |
| { .id = "927", .data = >911_chip_data }, |
| { .id = "928", .data = >911_chip_data }, |
| |
| { .id = "912", .data = >967_chip_data }, |
| { .id = "9147", .data = >967_chip_data }, |
| { .id = "967", .data = >967_chip_data }, |
| { } |
| }; |
| |
| static const unsigned long goodix_irq_flags[] = { |
| IRQ_TYPE_EDGE_RISING, |
| IRQ_TYPE_EDGE_FALLING, |
| IRQ_TYPE_LEVEL_LOW, |
| IRQ_TYPE_LEVEL_HIGH, |
| }; |
| |
| /* |
| * Those tablets have their coordinates origin at the bottom right |
| * of the tablet, as if rotated 180 degrees |
| */ |
| static const struct dmi_system_id rotated_screen[] = { |
| #if defined(CONFIG_DMI) && defined(CONFIG_X86) |
| { |
| .ident = "Teclast X89", |
| .matches = { |
| /* tPAD is too generic, also match on bios date */ |
| DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), |
| DMI_MATCH(DMI_BOARD_NAME, "tPAD"), |
| DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"), |
| }, |
| }, |
| { |
| .ident = "Teclast X98 Pro", |
| .matches = { |
| /* |
| * Only match BIOS date, because the manufacturers |
| * BIOS does not report the board name at all |
| * (sometimes)... |
| */ |
| DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), |
| DMI_MATCH(DMI_BIOS_DATE, "10/28/2015"), |
| }, |
| }, |
| { |
| .ident = "WinBook TW100", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "TW100") |
| } |
| }, |
| { |
| .ident = "WinBook TW700", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "TW700") |
| }, |
| }, |
| #endif |
| {} |
| }; |
| |
| static const struct dmi_system_id nine_bytes_report[] = { |
| #if defined(CONFIG_DMI) && defined(CONFIG_X86) |
| { |
| .ident = "Lenovo YogaBook", |
| /* YB1-X91L/F and YB1-X90L/F */ |
| .matches = { |
| DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") |
| } |
| }, |
| #endif |
| {} |
| }; |
| |
| /* |
| * Those tablets have their x coordinate inverted |
| */ |
| static const struct dmi_system_id inverted_x_screen[] = { |
| #if defined(CONFIG_DMI) && defined(CONFIG_X86) |
| { |
| .ident = "Cube I15-TC", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Cube"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") |
| }, |
| }, |
| #endif |
| {} |
| }; |
| |
| /** |
| * goodix_i2c_read - read data from a register of the i2c slave device. |
| * |
| * @client: i2c device. |
| * @reg: the register to read from. |
| * @buf: raw write data buffer. |
| * @len: length of the buffer to write |
| */ |
| static int goodix_i2c_read(struct i2c_client *client, |
| u16 reg, u8 *buf, int len) |
| { |
| struct i2c_msg msgs[2]; |
| __be16 wbuf = cpu_to_be16(reg); |
| int ret; |
| |
| msgs[0].flags = 0; |
| msgs[0].addr = client->addr; |
| msgs[0].len = 2; |
| msgs[0].buf = (u8 *)&wbuf; |
| |
| msgs[1].flags = I2C_M_RD; |
| msgs[1].addr = client->addr; |
| msgs[1].len = len; |
| msgs[1].buf = buf; |
| |
| ret = i2c_transfer(client->adapter, msgs, 2); |
| return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); |
| } |
| |
| /** |
| * goodix_i2c_write - write data to a register of the i2c slave device. |
| * |
| * @client: i2c device. |
| * @reg: the register to write to. |
| * @buf: raw data buffer to write. |
| * @len: length of the buffer to write |
| */ |
| static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, |
| unsigned len) |
| { |
| u8 *addr_buf; |
| struct i2c_msg msg; |
| int ret; |
| |
| addr_buf = kmalloc(len + 2, GFP_KERNEL); |
| if (!addr_buf) |
| return -ENOMEM; |
| |
| addr_buf[0] = reg >> 8; |
| addr_buf[1] = reg & 0xFF; |
| memcpy(&addr_buf[2], buf, len); |
| |
| msg.flags = 0; |
| msg.addr = client->addr; |
| msg.buf = addr_buf; |
| msg.len = len + 2; |
| |
| ret = i2c_transfer(client->adapter, &msg, 1); |
| kfree(addr_buf); |
| return ret < 0 ? ret : (ret != 1 ? -EIO : 0); |
| } |
| |
| static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) |
| { |
| return goodix_i2c_write(client, reg, &value, sizeof(value)); |
| } |
| |
| static const struct goodix_chip_data *goodix_get_chip_data(const char *id) |
| { |
| unsigned int i; |
| |
| for (i = 0; goodix_chip_ids[i].id; i++) { |
| if (!strcmp(goodix_chip_ids[i].id, id)) |
| return goodix_chip_ids[i].data; |
| } |
| |
| return >9x_chip_data; |
| } |
| |
| static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) |
| { |
| unsigned long max_timeout; |
| int touch_num; |
| int error; |
| u16 addr = GOODIX_READ_COOR_ADDR; |
| /* |
| * We are going to read 1-byte header, |
| * ts->contact_size * max(1, touch_num) bytes of coordinates |
| * and 1-byte footer which contains the touch-key code. |
| */ |
| const int header_contact_keycode_size = 1 + ts->contact_size + 1; |
| |
| /* |
| * The 'buffer status' bit, which indicates that the data is valid, is |
| * not set as soon as the interrupt is raised, but slightly after. |
| * This takes around 10 ms to happen, so we poll for 20 ms. |
| */ |
| max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); |
| do { |
| error = goodix_i2c_read(ts->client, addr, data, |
| header_contact_keycode_size); |
| if (error) { |
| dev_err(&ts->client->dev, "I2C transfer error: %d\n", |
| error); |
| return error; |
| } |
| |
| if (data[0] & GOODIX_BUFFER_STATUS_READY) { |
| touch_num = data[0] & 0x0f; |
| if (touch_num > ts->max_touch_num) |
| return -EPROTO; |
| |
| if (touch_num > 1) { |
| addr += header_contact_keycode_size; |
| data += header_contact_keycode_size; |
| error = goodix_i2c_read(ts->client, |
| addr, data, |
| ts->contact_size * |
| (touch_num - 1)); |
| if (error) |
| return error; |
| } |
| |
| return touch_num; |
| } |
| |
| usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ |
| } while (time_before(jiffies, max_timeout)); |
| |
| /* |
| * The Goodix panel will send spurious interrupts after a |
| * 'finger up' event, which will always cause a timeout. |
| */ |
| return -ENOMSG; |
| } |
| |
| static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) |
| { |
| int id = coor_data[0] & 0x0F; |
| int input_x = get_unaligned_le16(&coor_data[1]); |
| int input_y = get_unaligned_le16(&coor_data[3]); |
| int input_w = get_unaligned_le16(&coor_data[5]); |
| |
| input_mt_slot(ts->input_dev, id); |
| input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); |
| touchscreen_report_pos(ts->input_dev, &ts->prop, |
| input_x, input_y, true); |
| input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); |
| input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); |
| } |
| |
| static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) |
| { |
| int id = coor_data[1] & 0x0F; |
| int input_x = get_unaligned_le16(&coor_data[3]); |
| int input_y = get_unaligned_le16(&coor_data[5]); |
| int input_w = get_unaligned_le16(&coor_data[7]); |
| |
| input_mt_slot(ts->input_dev, id); |
| input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); |
| touchscreen_report_pos(ts->input_dev, &ts->prop, |
| input_x, input_y, true); |
| input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); |
| input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); |
| } |
| |
| static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) |
| { |
| int touch_num; |
| u8 key_value; |
| int i; |
| |
| if (data[0] & GOODIX_HAVE_KEY) { |
| touch_num = data[0] & 0x0f; |
| key_value = data[1 + ts->contact_size * touch_num]; |
| for (i = 0; i < GOODIX_MAX_KEYS; i++) |
| if (key_value & BIT(i)) |
| input_report_key(ts->input_dev, |
| ts->keymap[i], 1); |
| } else { |
| for (i = 0; i < GOODIX_MAX_KEYS; i++) |
| input_report_key(ts->input_dev, ts->keymap[i], 0); |
| } |
| } |
| |
| /** |
| * goodix_process_events - Process incoming events |
| * |
| * @ts: our goodix_ts_data pointer |
| * |
| * Called when the IRQ is triggered. Read the current device state, and push |
| * the input events to the user space. |
| */ |
| static void goodix_process_events(struct goodix_ts_data *ts) |
| { |
| u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; |
| int touch_num; |
| int i; |
| |
| touch_num = goodix_ts_read_input_report(ts, point_data); |
| if (touch_num < 0) |
| return; |
| |
| goodix_ts_report_key(ts, point_data); |
| |
| for (i = 0; i < touch_num; i++) |
| if (ts->contact_size == 9) |
| goodix_ts_report_touch_9b(ts, |
| &point_data[1 + ts->contact_size * i]); |
| else |
| goodix_ts_report_touch_8b(ts, |
| &point_data[1 + ts->contact_size * i]); |
| |
| input_mt_sync_frame(ts->input_dev); |
| input_sync(ts->input_dev); |
| } |
| |
| /** |
| * goodix_ts_irq_handler - The IRQ handler |
| * |
| * @irq: interrupt number. |
| * @dev_id: private data pointer. |
| */ |
| static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) |
| { |
| struct goodix_ts_data *ts = dev_id; |
| |
| goodix_process_events(ts); |
| |
| if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) |
| dev_err(&ts->client->dev, "I2C write end_cmd error\n"); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void goodix_free_irq(struct goodix_ts_data *ts) |
| { |
| devm_free_irq(&ts->client->dev, ts->client->irq, ts); |
| } |
| |
| static int goodix_request_irq(struct goodix_ts_data *ts) |
| { |
| return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, |
| NULL, goodix_ts_irq_handler, |
| ts->irq_flags, ts->client->name, ts); |
| } |
| |
| static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) |
| { |
| int i, raw_cfg_len = len - 2; |
| u8 check_sum = 0; |
| |
| for (i = 0; i < raw_cfg_len; i++) |
| check_sum += cfg[i]; |
| check_sum = (~check_sum) + 1; |
| if (check_sum != cfg[raw_cfg_len]) { |
| dev_err(&ts->client->dev, |
| "The checksum of the config fw is not correct"); |
| return -EINVAL; |
| } |
| |
| if (cfg[raw_cfg_len + 1] != 1) { |
| dev_err(&ts->client->dev, |
| "Config fw must have Config_Fresh register set"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) |
| { |
| int i, raw_cfg_len = ts->chip->config_len - 2; |
| u8 check_sum = 0; |
| |
| for (i = 0; i < raw_cfg_len; i++) |
| check_sum += ts->config[i]; |
| check_sum = (~check_sum) + 1; |
| |
| ts->config[raw_cfg_len] = check_sum; |
| ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ |
| } |
| |
| static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, |
| int len) |
| { |
| int i, raw_cfg_len = len - 3; |
| u16 check_sum = 0; |
| |
| for (i = 0; i < raw_cfg_len; i += 2) |
| check_sum += get_unaligned_be16(&cfg[i]); |
| check_sum = (~check_sum) + 1; |
| if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { |
| dev_err(&ts->client->dev, |
| "The checksum of the config fw is not correct"); |
| return -EINVAL; |
| } |
| |
| if (cfg[raw_cfg_len + 2] != 1) { |
| dev_err(&ts->client->dev, |
| "Config fw must have Config_Fresh register set"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) |
| { |
| int i, raw_cfg_len = ts->chip->config_len - 3; |
| u16 check_sum = 0; |
| |
| for (i = 0; i < raw_cfg_len; i += 2) |
| check_sum += get_unaligned_be16(&ts->config[i]); |
| check_sum = (~check_sum) + 1; |
| |
| put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); |
| ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ |
| } |
| |
| /** |
| * goodix_check_cfg - Checks if config fw is valid |
| * |
| * @ts: goodix_ts_data pointer |
| * @cfg: firmware config data |
| * @len: config data length |
| */ |
| static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) |
| { |
| if (len < GOODIX_CONFIG_MIN_LENGTH || |
| len > GOODIX_CONFIG_MAX_LENGTH) { |
| dev_err(&ts->client->dev, |
| "The length of the config fw is not correct"); |
| return -EINVAL; |
| } |
| |
| return ts->chip->check_config(ts, cfg, len); |
| } |
| |
| /** |
| * goodix_send_cfg - Write fw config to device |
| * |
| * @ts: goodix_ts_data pointer |
| * @cfg: config firmware to write to device |
| * @len: config data length |
| */ |
| static int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) |
| { |
| int error; |
| |
| error = goodix_check_cfg(ts, cfg, len); |
| if (error) |
| return error; |
| |
| error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); |
| if (error) { |
| dev_err(&ts->client->dev, "Failed to write config data: %d", |
| error); |
| return error; |
| } |
| dev_dbg(&ts->client->dev, "Config sent successfully."); |
| |
| /* Let the firmware reconfigure itself, so sleep for 10ms */ |
| usleep_range(10000, 11000); |
| |
| return 0; |
| } |
| |
| #ifdef ACPI_GPIO_SUPPORT |
| static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) |
| { |
| acpi_handle handle = ACPI_HANDLE(&ts->client->dev); |
| acpi_status status; |
| |
| status = acpi_evaluate_object(handle, "INTI", NULL, NULL); |
| return ACPI_SUCCESS(status) ? 0 : -EIO; |
| } |
| |
| static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) |
| { |
| acpi_handle handle = ACPI_HANDLE(&ts->client->dev); |
| acpi_status status; |
| |
| status = acpi_execute_simple_method(handle, "INTO", value); |
| return ACPI_SUCCESS(status) ? 0 : -EIO; |
| } |
| #else |
| static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) |
| { |
| dev_err(&ts->client->dev, |
| "%s called on device without ACPI support\n", __func__); |
| return -EINVAL; |
| } |
| |
| static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) |
| { |
| dev_err(&ts->client->dev, |
| "%s called on device without ACPI support\n", __func__); |
| return -EINVAL; |
| } |
| #endif |
| |
| static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value) |
| { |
| switch (ts->irq_pin_access_method) { |
| case IRQ_PIN_ACCESS_NONE: |
| dev_err(&ts->client->dev, |
| "%s called without an irq_pin_access_method set\n", |
| __func__); |
| return -EINVAL; |
| case IRQ_PIN_ACCESS_GPIO: |
| return gpiod_direction_output(ts->gpiod_int, value); |
| case IRQ_PIN_ACCESS_ACPI_GPIO: |
| /* |
| * The IRQ pin triggers on a falling edge, so its gets marked |
| * as active-low, use output_raw to avoid the value inversion. |
| */ |
| return gpiod_direction_output_raw(ts->gpiod_int, value); |
| case IRQ_PIN_ACCESS_ACPI_METHOD: |
| return goodix_pin_acpi_output_method(ts, value); |
| } |
| |
| return -EINVAL; /* Never reached */ |
| } |
| |
| static int goodix_irq_direction_input(struct goodix_ts_data *ts) |
| { |
| switch (ts->irq_pin_access_method) { |
| case IRQ_PIN_ACCESS_NONE: |
| dev_err(&ts->client->dev, |
| "%s called without an irq_pin_access_method set\n", |
| __func__); |
| return -EINVAL; |
| case IRQ_PIN_ACCESS_GPIO: |
| return gpiod_direction_input(ts->gpiod_int); |
| case IRQ_PIN_ACCESS_ACPI_GPIO: |
| return gpiod_direction_input(ts->gpiod_int); |
| case IRQ_PIN_ACCESS_ACPI_METHOD: |
| return goodix_pin_acpi_direction_input(ts); |
| } |
| |
| return -EINVAL; /* Never reached */ |
| } |
| |
| static int goodix_int_sync(struct goodix_ts_data *ts) |
| { |
| int error; |
| |
| error = goodix_irq_direction_output(ts, 0); |
| if (error) |
| return error; |
| |
| msleep(50); /* T5: 50ms */ |
| |
| error = goodix_irq_direction_input(ts); |
| if (error) |
| return error; |
| |
| return 0; |
| } |
| |
| /** |
| * goodix_reset - Reset device during power on |
| * |
| * @ts: goodix_ts_data pointer |
| */ |
| static int goodix_reset(struct goodix_ts_data *ts) |
| { |
| int error; |
| |
| /* begin select I2C slave addr */ |
| error = gpiod_direction_output(ts->gpiod_rst, 0); |
| if (error) |
| return error; |
| |
| msleep(20); /* T2: > 10ms */ |
| |
| /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ |
| error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); |
| if (error) |
| return error; |
| |
| usleep_range(100, 2000); /* T3: > 100us */ |
| |
| error = gpiod_direction_output(ts->gpiod_rst, 1); |
| if (error) |
| return error; |
| |
| usleep_range(6000, 10000); /* T4: > 5ms */ |
| |
| /* end select I2C slave addr */ |
| error = gpiod_direction_input(ts->gpiod_rst); |
| if (error) |
| return error; |
| |
| error = goodix_int_sync(ts); |
| if (error) |
| return error; |
| |
| return 0; |
| } |
| |
| #ifdef ACPI_GPIO_SUPPORT |
| #include <asm/cpu_device_id.h> |
| #include <asm/intel-family.h> |
| |
| static const struct x86_cpu_id baytrail_cpu_ids[] = { |
| { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, |
| {} |
| }; |
| |
| static inline bool is_byt(void) |
| { |
| const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); |
| |
| return !!id; |
| } |
| |
| static const struct acpi_gpio_params first_gpio = { 0, 0, false }; |
| static const struct acpi_gpio_params second_gpio = { 1, 0, false }; |
| |
| static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { |
| { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, |
| { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, |
| { }, |
| }; |
| |
| static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { |
| { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, |
| { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, |
| { }, |
| }; |
| |
| static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { |
| { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, |
| { }, |
| }; |
| |
| static int goodix_resource(struct acpi_resource *ares, void *data) |
| { |
| struct goodix_ts_data *ts = data; |
| struct device *dev = &ts->client->dev; |
| struct acpi_resource_gpio *gpio; |
| |
| switch (ares->type) { |
| case ACPI_RESOURCE_TYPE_GPIO: |
| gpio = &ares->data.gpio; |
| if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { |
| if (ts->gpio_int_idx == -1) { |
| ts->gpio_int_idx = ts->gpio_count; |
| } else { |
| dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); |
| ts->gpio_int_idx = -2; |
| } |
| } |
| ts->gpio_count++; |
| break; |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * This function gets called in case we fail to get the irq GPIO directly |
| * because the ACPI tables lack GPIO-name to APCI _CRS index mappings |
| * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). |
| * In that case we add our own mapping and then goodix_get_gpio_config() |
| * retries to get the GPIOs based on the added mapping. |
| */ |
| static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) |
| { |
| const struct acpi_gpio_mapping *gpio_mapping = NULL; |
| struct device *dev = &ts->client->dev; |
| LIST_HEAD(resources); |
| int ret; |
| |
| ts->gpio_count = 0; |
| ts->gpio_int_idx = -1; |
| ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, |
| goodix_resource, ts); |
| if (ret < 0) { |
| dev_err(dev, "Error getting ACPI resources: %d\n", ret); |
| return ret; |
| } |
| |
| acpi_dev_free_resource_list(&resources); |
| |
| if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { |
| ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; |
| gpio_mapping = acpi_goodix_int_first_gpios; |
| } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { |
| ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; |
| gpio_mapping = acpi_goodix_int_last_gpios; |
| } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && |
| acpi_has_method(ACPI_HANDLE(dev), "INTI") && |
| acpi_has_method(ACPI_HANDLE(dev), "INTO")) { |
| dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); |
| ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; |
| gpio_mapping = acpi_goodix_reset_only_gpios; |
| } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { |
| dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); |
| ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; |
| gpio_mapping = acpi_goodix_int_last_gpios; |
| } else { |
| dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", |
| ts->gpio_count, ts->gpio_int_idx); |
| return -EINVAL; |
| } |
| |
| return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); |
| } |
| #else |
| static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) |
| { |
| return -EINVAL; |
| } |
| #endif /* CONFIG_X86 && CONFIG_ACPI */ |
| |
| /** |
| * goodix_get_gpio_config - Get GPIO config from ACPI/DT |
| * |
| * @ts: goodix_ts_data pointer |
| */ |
| static int goodix_get_gpio_config(struct goodix_ts_data *ts) |
| { |
| int error; |
| struct device *dev; |
| struct gpio_desc *gpiod; |
| bool added_acpi_mappings = false; |
| |
| if (!ts->client) |
| return -EINVAL; |
| dev = &ts->client->dev; |
| |
| ts->avdd28 = devm_regulator_get(dev, "AVDD28"); |
| if (IS_ERR(ts->avdd28)) { |
| error = PTR_ERR(ts->avdd28); |
| if (error != -EPROBE_DEFER) |
| dev_err(dev, |
| "Failed to get AVDD28 regulator: %d\n", error); |
| return error; |
| } |
| |
| ts->vddio = devm_regulator_get(dev, "VDDIO"); |
| if (IS_ERR(ts->vddio)) { |
| error = PTR_ERR(ts->vddio); |
| if (error != -EPROBE_DEFER) |
| dev_err(dev, |
| "Failed to get VDDIO regulator: %d\n", error); |
| return error; |
| } |
| |
| retry_get_irq_gpio: |
| /* Get the interrupt GPIO pin number */ |
| gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); |
| if (IS_ERR(gpiod)) { |
| error = PTR_ERR(gpiod); |
| if (error != -EPROBE_DEFER) |
| dev_dbg(dev, "Failed to get %s GPIO: %d\n", |
| GOODIX_GPIO_INT_NAME, error); |
| return error; |
| } |
| if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { |
| added_acpi_mappings = true; |
| if (goodix_add_acpi_gpio_mappings(ts) == 0) |
| goto retry_get_irq_gpio; |
| } |
| |
| ts->gpiod_int = gpiod; |
| |
| /* Get the reset line GPIO pin number */ |
| gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); |
| if (IS_ERR(gpiod)) { |
| error = PTR_ERR(gpiod); |
| if (error != -EPROBE_DEFER) |
| dev_dbg(dev, "Failed to get %s GPIO: %d\n", |
| GOODIX_GPIO_RST_NAME, error); |
| return error; |
| } |
| |
| ts->gpiod_rst = gpiod; |
| |
| switch (ts->irq_pin_access_method) { |
| case IRQ_PIN_ACCESS_ACPI_GPIO: |
| /* |
| * We end up here if goodix_add_acpi_gpio_mappings() has |
| * called devm_acpi_dev_add_driver_gpios() because the ACPI |
| * tables did not contain name to index mappings. |
| * Check that we successfully got both GPIOs after we've |
| * added our own acpi_gpio_mapping and if we did not get both |
| * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. |
| */ |
| if (!ts->gpiod_int || !ts->gpiod_rst) |
| ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; |
| break; |
| case IRQ_PIN_ACCESS_ACPI_METHOD: |
| if (!ts->gpiod_rst) |
| ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; |
| break; |
| default: |
| if (ts->gpiod_int && ts->gpiod_rst) { |
| ts->reset_controller_at_probe = true; |
| ts->load_cfg_from_disk = true; |
| ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * goodix_read_config - Read the embedded configuration of the panel |
| * |
| * @ts: our goodix_ts_data pointer |
| * |
| * Must be called during probe |
| */ |
| static void goodix_read_config(struct goodix_ts_data *ts) |
| { |
| int x_max, y_max; |
| int error; |
| |
| error = goodix_i2c_read(ts->client, ts->chip->config_addr, |
| ts->config, ts->chip->config_len); |
| if (error) { |
| dev_warn(&ts->client->dev, "Error reading config: %d\n", |
| error); |
| ts->int_trigger_type = GOODIX_INT_TRIGGER; |
| ts->max_touch_num = GOODIX_MAX_CONTACTS; |
| return; |
| } |
| |
| ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; |
| ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; |
| |
| x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); |
| y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); |
| if (x_max && y_max) { |
| input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); |
| input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); |
| } |
| |
| ts->chip->calc_config_checksum(ts); |
| } |
| |
| /** |
| * goodix_read_version - Read goodix touchscreen version |
| * |
| * @ts: our goodix_ts_data pointer |
| */ |
| static int goodix_read_version(struct goodix_ts_data *ts) |
| { |
| int error; |
| u8 buf[6]; |
| char id_str[GOODIX_ID_MAX_LEN + 1]; |
| |
| error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); |
| if (error) { |
| dev_err(&ts->client->dev, "read version failed: %d\n", error); |
| return error; |
| } |
| |
| memcpy(id_str, buf, GOODIX_ID_MAX_LEN); |
| id_str[GOODIX_ID_MAX_LEN] = 0; |
| strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); |
| |
| ts->version = get_unaligned_le16(&buf[4]); |
| |
| dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, |
| ts->version); |
| |
| return 0; |
| } |
| |
| /** |
| * goodix_i2c_test - I2C test function to check if the device answers. |
| * |
| * @client: the i2c client |
| */ |
| static int goodix_i2c_test(struct i2c_client *client) |
| { |
| int retry = 0; |
| int error; |
| u8 test; |
| |
| while (retry++ < 2) { |
| error = goodix_i2c_read(client, GOODIX_REG_ID, |
| &test, 1); |
| if (!error) |
| return 0; |
| |
| dev_err(&client->dev, "i2c test failed attempt %d: %d\n", |
| retry, error); |
| msleep(20); |
| } |
| |
| return error; |
| } |
| |
| /** |
| * goodix_configure_dev - Finish device initialization |
| * |
| * @ts: our goodix_ts_data pointer |
| * |
| * Must be called from probe to finish initialization of the device. |
| * Contains the common initialization code for both devices that |
| * declare gpio pins and devices that do not. It is either called |
| * directly from probe or from request_firmware_wait callback. |
| */ |
| static int goodix_configure_dev(struct goodix_ts_data *ts) |
| { |
| int error; |
| int i; |
| |
| ts->int_trigger_type = GOODIX_INT_TRIGGER; |
| ts->max_touch_num = GOODIX_MAX_CONTACTS; |
| |
| ts->input_dev = devm_input_allocate_device(&ts->client->dev); |
| if (!ts->input_dev) { |
| dev_err(&ts->client->dev, "Failed to allocate input device."); |
| return -ENOMEM; |
| } |
| |
| ts->input_dev->name = "Goodix Capacitive TouchScreen"; |
| ts->input_dev->phys = "input/ts"; |
| ts->input_dev->id.bustype = BUS_I2C; |
| ts->input_dev->id.vendor = 0x0416; |
| if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) |
| ts->input_dev->id.product = 0x1001; |
| ts->input_dev->id.version = ts->version; |
| |
| ts->input_dev->keycode = ts->keymap; |
| ts->input_dev->keycodesize = sizeof(ts->keymap[0]); |
| ts->input_dev->keycodemax = GOODIX_MAX_KEYS; |
| |
| /* Capacitive Windows/Home button on some devices */ |
| for (i = 0; i < GOODIX_MAX_KEYS; ++i) { |
| if (i == 0) |
| ts->keymap[i] = KEY_LEFTMETA; |
| else |
| ts->keymap[i] = KEY_F1 + (i - 1); |
| |
| input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); |
| } |
| |
| input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); |
| input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); |
| input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); |
| input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); |
| |
| /* Read configuration and apply touchscreen parameters */ |
| goodix_read_config(ts); |
| |
| /* Try overriding touchscreen parameters via device properties */ |
| touchscreen_parse_properties(ts->input_dev, true, &ts->prop); |
| |
| if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { |
| dev_err(&ts->client->dev, |
| "Invalid config (%d, %d, %d), using defaults\n", |
| ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); |
| ts->prop.max_x = GOODIX_MAX_WIDTH - 1; |
| ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; |
| ts->max_touch_num = GOODIX_MAX_CONTACTS; |
| input_abs_set_max(ts->input_dev, |
| ABS_MT_POSITION_X, ts->prop.max_x); |
| input_abs_set_max(ts->input_dev, |
| ABS_MT_POSITION_Y, ts->prop.max_y); |
| } |
| |
| if (dmi_check_system(rotated_screen)) { |
| ts->prop.invert_x = true; |
| ts->prop.invert_y = true; |
| dev_dbg(&ts->client->dev, |
| "Applying '180 degrees rotated screen' quirk\n"); |
| } |
| |
| if (dmi_check_system(nine_bytes_report)) { |
| ts->contact_size = 9; |
| |
| dev_dbg(&ts->client->dev, |
| "Non-standard 9-bytes report format quirk\n"); |
| } |
| |
| if (dmi_check_system(inverted_x_screen)) { |
| ts->prop.invert_x = true; |
| dev_dbg(&ts->client->dev, |
| "Applying 'inverted x screen' quirk\n"); |
| } |
| |
| error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, |
| INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); |
| if (error) { |
| dev_err(&ts->client->dev, |
| "Failed to initialize MT slots: %d", error); |
| return error; |
| } |
| |
| error = input_register_device(ts->input_dev); |
| if (error) { |
| dev_err(&ts->client->dev, |
| "Failed to register input device: %d", error); |
| return error; |
| } |
| |
| ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; |
| error = goodix_request_irq(ts); |
| if (error) { |
| dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * goodix_config_cb - Callback to finish device init |
| * |
| * @cfg: firmware config |
| * @ctx: our goodix_ts_data pointer |
| * |
| * request_firmware_wait callback that finishes |
| * initialization of the device. |
| */ |
| static void goodix_config_cb(const struct firmware *cfg, void *ctx) |
| { |
| struct goodix_ts_data *ts = ctx; |
| int error; |
| |
| if (cfg) { |
| /* send device configuration to the firmware */ |
| error = goodix_send_cfg(ts, cfg->data, cfg->size); |
| if (error) |
| goto err_release_cfg; |
| } |
| |
| goodix_configure_dev(ts); |
| |
| err_release_cfg: |
| release_firmware(cfg); |
| complete_all(&ts->firmware_loading_complete); |
| } |
| |
| static void goodix_disable_regulators(void *arg) |
| { |
| struct goodix_ts_data *ts = arg; |
| |
| regulator_disable(ts->vddio); |
| regulator_disable(ts->avdd28); |
| } |
| |
| static int goodix_ts_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct goodix_ts_data *ts; |
| int error; |
| |
| dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); |
| |
| if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { |
| dev_err(&client->dev, "I2C check functionality failed.\n"); |
| return -ENXIO; |
| } |
| |
| ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); |
| if (!ts) |
| return -ENOMEM; |
| |
| ts->client = client; |
| i2c_set_clientdata(client, ts); |
| init_completion(&ts->firmware_loading_complete); |
| ts->contact_size = GOODIX_CONTACT_SIZE; |
| |
| error = goodix_get_gpio_config(ts); |
| if (error) |
| return error; |
| |
| /* power up the controller */ |
| error = regulator_enable(ts->avdd28); |
| if (error) { |
| dev_err(&client->dev, |
| "Failed to enable AVDD28 regulator: %d\n", |
| error); |
| return error; |
| } |
| |
| error = regulator_enable(ts->vddio); |
| if (error) { |
| dev_err(&client->dev, |
| "Failed to enable VDDIO regulator: %d\n", |
| error); |
| regulator_disable(ts->avdd28); |
| return error; |
| } |
| |
| error = devm_add_action_or_reset(&client->dev, |
| goodix_disable_regulators, ts); |
| if (error) |
| return error; |
| |
| reset: |
| if (ts->reset_controller_at_probe) { |
| /* reset the controller */ |
| error = goodix_reset(ts); |
| if (error) { |
| dev_err(&client->dev, "Controller reset failed.\n"); |
| return error; |
| } |
| } |
| |
| error = goodix_i2c_test(client); |
| if (error) { |
| if (!ts->reset_controller_at_probe && |
| ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { |
| /* Retry after a controller reset */ |
| ts->reset_controller_at_probe = true; |
| goto reset; |
| } |
| dev_err(&client->dev, "I2C communication failure: %d\n", error); |
| return error; |
| } |
| |
| error = goodix_read_version(ts); |
| if (error) { |
| dev_err(&client->dev, "Read version failed.\n"); |
| return error; |
| } |
| |
| ts->chip = goodix_get_chip_data(ts->id); |
| |
| if (ts->load_cfg_from_disk) { |
| /* update device config */ |
| ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, |
| "goodix_%s_cfg.bin", ts->id); |
| if (!ts->cfg_name) |
| return -ENOMEM; |
| |
| error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, |
| &client->dev, GFP_KERNEL, ts, |
| goodix_config_cb); |
| if (error) { |
| dev_err(&client->dev, |
| "Failed to invoke firmware loader: %d\n", |
| error); |
| return error; |
| } |
| |
| return 0; |
| } else { |
| error = goodix_configure_dev(ts); |
| if (error) |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| static int goodix_ts_remove(struct i2c_client *client) |
| { |
| struct goodix_ts_data *ts = i2c_get_clientdata(client); |
| |
| if (ts->load_cfg_from_disk) |
| wait_for_completion(&ts->firmware_loading_complete); |
| |
| return 0; |
| } |
| |
| static int __maybe_unused goodix_suspend(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct goodix_ts_data *ts = i2c_get_clientdata(client); |
| int error; |
| |
| if (ts->load_cfg_from_disk) |
| wait_for_completion(&ts->firmware_loading_complete); |
| |
| /* We need gpio pins to suspend/resume */ |
| if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { |
| disable_irq(client->irq); |
| return 0; |
| } |
| |
| /* Free IRQ as IRQ pin is used as output in the suspend sequence */ |
| goodix_free_irq(ts); |
| |
| /* Output LOW on the INT pin for 5 ms */ |
| error = goodix_irq_direction_output(ts, 0); |
| if (error) { |
| goodix_request_irq(ts); |
| return error; |
| } |
| |
| usleep_range(5000, 6000); |
| |
| error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, |
| GOODIX_CMD_SCREEN_OFF); |
| if (error) { |
| dev_err(&ts->client->dev, "Screen off command failed\n"); |
| goodix_irq_direction_input(ts); |
| goodix_request_irq(ts); |
| return -EAGAIN; |
| } |
| |
| /* |
| * The datasheet specifies that the interval between sending screen-off |
| * command and wake-up should be longer than 58 ms. To avoid waking up |
| * sooner, delay 58ms here. |
| */ |
| msleep(58); |
| return 0; |
| } |
| |
| static int __maybe_unused goodix_resume(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct goodix_ts_data *ts = i2c_get_clientdata(client); |
| u8 config_ver; |
| int error; |
| |
| if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { |
| enable_irq(client->irq); |
| return 0; |
| } |
| |
| /* |
| * Exit sleep mode by outputting HIGH level to INT pin |
| * for 2ms~5ms. |
| */ |
| error = goodix_irq_direction_output(ts, 1); |
| if (error) |
| return error; |
| |
| usleep_range(2000, 5000); |
| |
| error = goodix_int_sync(ts); |
| if (error) |
| return error; |
| |
| error = goodix_i2c_read(ts->client, ts->chip->config_addr, |
| &config_ver, 1); |
| if (error) |
| dev_warn(dev, "Error reading config version: %d, resetting controller\n", |
| error); |
| else if (config_ver != ts->config[0]) |
| dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", |
| config_ver, ts->config[0]); |
| |
| if (error != 0 || config_ver != ts->config[0]) { |
| error = goodix_reset(ts); |
| if (error) { |
| dev_err(dev, "Controller reset failed.\n"); |
| return error; |
| } |
| |
| error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); |
| if (error) |
| return error; |
| } |
| |
| error = goodix_request_irq(ts); |
| if (error) |
| return error; |
| |
| return 0; |
| } |
| |
| static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); |
| |
| static const struct i2c_device_id goodix_ts_id[] = { |
| { "GDIX1001:00", 0 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, goodix_ts_id); |
| |
| #ifdef CONFIG_ACPI |
| static const struct acpi_device_id goodix_acpi_match[] = { |
| { "GDIX1001", 0 }, |
| { "GDIX1002", 0 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); |
| #endif |
| |
| #ifdef CONFIG_OF |
| static const struct of_device_id goodix_of_match[] = { |
| { .compatible = "goodix,gt1151" }, |
| { .compatible = "goodix,gt5663" }, |
| { .compatible = "goodix,gt5688" }, |
| { .compatible = "goodix,gt911" }, |
| { .compatible = "goodix,gt9110" }, |
| { .compatible = "goodix,gt912" }, |
| { .compatible = "goodix,gt9147" }, |
| { .compatible = "goodix,gt917s" }, |
| { .compatible = "goodix,gt927" }, |
| { .compatible = "goodix,gt9271" }, |
| { .compatible = "goodix,gt928" }, |
| { .compatible = "goodix,gt967" }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, goodix_of_match); |
| #endif |
| |
| static struct i2c_driver goodix_ts_driver = { |
| .probe = goodix_ts_probe, |
| .remove = goodix_ts_remove, |
| .id_table = goodix_ts_id, |
| .driver = { |
| .name = "Goodix-TS", |
| .acpi_match_table = ACPI_PTR(goodix_acpi_match), |
| .of_match_table = of_match_ptr(goodix_of_match), |
| .pm = &goodix_pm_ops, |
| }, |
| }; |
| module_i2c_driver(goodix_ts_driver); |
| |
| MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); |
| MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); |
| MODULE_DESCRIPTION("Goodix touchscreen driver"); |
| MODULE_LICENSE("GPL v2"); |