[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/input/touchscreen/goodix.c b/src/kernel/linux/v4.14/drivers/input/touchscreen/goodix.c
new file mode 100644
index 0000000..777dd5b
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/input/touchscreen/goodix.c
@@ -0,0 +1,936 @@
+/*
+ * 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.
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; version 2 of the License.
+ */
+
+#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/module.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/of.h>
+#include <asm/unaligned.h>
+
+struct goodix_ts_data {
+ struct i2c_client *client;
+ struct input_dev *input_dev;
+ int abs_x_max;
+ int abs_y_max;
+ bool swapped_x_y;
+ bool inverted_x;
+ bool inverted_y;
+ unsigned int max_touch_num;
+ unsigned int int_trigger_type;
+ int cfg_len;
+ struct gpio_desc *gpiod_int;
+ struct gpio_desc *gpiod_rst;
+ u16 id;
+ u16 version;
+ const char *cfg_name;
+ struct completion firmware_loading_complete;
+ unsigned long irq_flags;
+};
+
+#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_CONTACTS 10
+
+#define GOODIX_CONFIG_MAX_LENGTH 240
+#define GOODIX_CONFIG_911_LENGTH 186
+#define GOODIX_CONFIG_967_LENGTH 228
+
+/* Register defines */
+#define GOODIX_REG_COMMAND 0x8040
+#define GOODIX_CMD_SCREEN_OFF 0x05
+
+#define GOODIX_READ_COOR_ADDR 0x814E
+#define GOODIX_REG_CONFIG_DATA 0x8047
+#define GOODIX_REG_ID 0x8140
+
+#define GOODIX_BUFFER_STATUS_READY BIT(7)
+#define GOODIX_BUFFER_STATUS_TIMEOUT 20
+
+#define RESOLUTION_LOC 1
+#define MAX_CONTACTS_LOC 5
+#define TRIGGER_LOC 6
+
+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 = "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
+ {}
+};
+
+/**
+ * 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];
+ u16 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 int goodix_get_cfg_len(u16 id)
+{
+ switch (id) {
+ case 911:
+ case 9271:
+ case 9110:
+ case 927:
+ case 928:
+ return GOODIX_CONFIG_911_LENGTH;
+
+ case 912:
+ case 967:
+ return GOODIX_CONFIG_967_LENGTH;
+
+ default:
+ return GOODIX_CONFIG_MAX_LENGTH;
+ }
+}
+
+static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
+{
+ unsigned long max_timeout;
+ int touch_num;
+ int error;
+
+ /*
+ * 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, GOODIX_READ_COOR_ADDR,
+ data, GOODIX_CONTACT_SIZE + 1);
+ 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) {
+ data += 1 + GOODIX_CONTACT_SIZE;
+ error = goodix_i2c_read(ts->client,
+ GOODIX_READ_COOR_ADDR +
+ 1 + GOODIX_CONTACT_SIZE,
+ data,
+ GOODIX_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 0;
+}
+
+static void goodix_ts_report_touch(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]);
+
+ /* Inversions have to happen before axis swapping */
+ if (ts->inverted_x)
+ input_x = ts->abs_x_max - input_x;
+ if (ts->inverted_y)
+ input_y = ts->abs_y_max - input_y;
+ if (ts->swapped_x_y)
+ swap(input_x, input_y);
+
+ input_mt_slot(ts->input_dev, id);
+ input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
+ input_report_abs(ts->input_dev, ABS_MT_POSITION_X, input_x);
+ input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, input_y);
+ input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w);
+ input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
+}
+
+/**
+ * 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[1 + GOODIX_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;
+
+ /*
+ * Bit 4 of the first byte reports the status of the capacitive
+ * Windows/Home button.
+ */
+ input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4));
+
+ for (i = 0; i < touch_num; i++)
+ goodix_ts_report_touch(ts,
+ &point_data[1 + GOODIX_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);
+}
+
+/**
+ * goodix_check_cfg - Checks if config fw is valid
+ *
+ * @ts: goodix_ts_data pointer
+ * @cfg: firmware config data
+ */
+static int goodix_check_cfg(struct goodix_ts_data *ts,
+ const struct firmware *cfg)
+{
+ int i, raw_cfg_len;
+ u8 check_sum = 0;
+
+ if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) {
+ dev_err(&ts->client->dev,
+ "The length of the config fw is not correct");
+ return -EINVAL;
+ }
+
+ raw_cfg_len = cfg->size - 2;
+ for (i = 0; i < raw_cfg_len; i++)
+ check_sum += cfg->data[i];
+ check_sum = (~check_sum) + 1;
+ if (check_sum != cfg->data[raw_cfg_len]) {
+ dev_err(&ts->client->dev,
+ "The checksum of the config fw is not correct");
+ return -EINVAL;
+ }
+
+ if (cfg->data[raw_cfg_len + 1] != 1) {
+ dev_err(&ts->client->dev,
+ "Config fw must have Config_Fresh register set");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * goodix_send_cfg - Write fw config to device
+ *
+ * @ts: goodix_ts_data pointer
+ * @cfg: config firmware to write to device
+ */
+static int goodix_send_cfg(struct goodix_ts_data *ts,
+ const struct firmware *cfg)
+{
+ int error;
+
+ error = goodix_check_cfg(ts, cfg);
+ if (error)
+ return error;
+
+ error = goodix_i2c_write(ts->client, GOODIX_REG_CONFIG_DATA, cfg->data,
+ cfg->size);
+ 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;
+}
+
+static int goodix_int_sync(struct goodix_ts_data *ts)
+{
+ int error;
+
+ error = gpiod_direction_output(ts->gpiod_int, 0);
+ if (error)
+ return error;
+
+ msleep(50); /* T5: 50ms */
+
+ error = gpiod_direction_input(ts->gpiod_int);
+ 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 = gpiod_direction_output(ts->gpiod_int, 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;
+}
+
+/**
+ * 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;
+
+ if (!ts->client)
+ return -EINVAL;
+ dev = &ts->client->dev;
+
+ /* 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;
+ }
+
+ 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;
+
+ 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)
+{
+ u8 config[GOODIX_CONFIG_MAX_LENGTH];
+ int error;
+
+ error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA,
+ config, ts->cfg_len);
+ if (error) {
+ dev_warn(&ts->client->dev,
+ "Error reading config (%d), using defaults\n",
+ error);
+ ts->abs_x_max = GOODIX_MAX_WIDTH;
+ ts->abs_y_max = GOODIX_MAX_HEIGHT;
+ if (ts->swapped_x_y)
+ swap(ts->abs_x_max, ts->abs_y_max);
+ ts->int_trigger_type = GOODIX_INT_TRIGGER;
+ ts->max_touch_num = GOODIX_MAX_CONTACTS;
+ return;
+ }
+
+ ts->abs_x_max = get_unaligned_le16(&config[RESOLUTION_LOC]);
+ ts->abs_y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]);
+ if (ts->swapped_x_y)
+ swap(ts->abs_x_max, ts->abs_y_max);
+ ts->int_trigger_type = config[TRIGGER_LOC] & 0x03;
+ ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f;
+ if (!ts->abs_x_max || !ts->abs_y_max || !ts->max_touch_num) {
+ dev_err(&ts->client->dev,
+ "Invalid config, using defaults\n");
+ ts->abs_x_max = GOODIX_MAX_WIDTH;
+ ts->abs_y_max = GOODIX_MAX_HEIGHT;
+ if (ts->swapped_x_y)
+ swap(ts->abs_x_max, ts->abs_y_max);
+ ts->max_touch_num = GOODIX_MAX_CONTACTS;
+ }
+
+ if (dmi_check_system(rotated_screen)) {
+ ts->inverted_x = true;
+ ts->inverted_y = true;
+ dev_dbg(&ts->client->dev,
+ "Applying '180 degrees rotated screen' quirk\n");
+ }
+}
+
+/**
+ * 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[5];
+
+ 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, 4);
+ id_str[4] = 0;
+ if (kstrtou16(id_str, 10, &ts->id))
+ ts->id = 0x1001;
+
+ ts->version = get_unaligned_le16(&buf[4]);
+
+ dev_info(&ts->client->dev, "ID %d, 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_CONFIG_DATA,
+ &test, 1);
+ if (!error)
+ return 0;
+
+ dev_err(&client->dev, "i2c test failed attempt %d: %d\n",
+ retry, error);
+ msleep(20);
+ }
+
+ return error;
+}
+
+/**
+ * goodix_request_input_dev - Allocate, populate and register the input device
+ *
+ * @ts: our goodix_ts_data pointer
+ *
+ * Must be called during probe
+ */
+static int goodix_request_input_dev(struct goodix_ts_data *ts)
+{
+ int error;
+
+ 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;
+ }
+
+ input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X,
+ 0, ts->abs_x_max, 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y,
+ 0, ts->abs_y_max, 0, 0);
+ 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);
+
+ input_mt_init_slots(ts->input_dev, ts->max_touch_num,
+ INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
+
+ 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;
+ ts->input_dev->id.product = ts->id;
+ ts->input_dev->id.version = ts->version;
+
+ /* Capacitive Windows/Home button on some devices */
+ input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA);
+
+ error = input_register_device(ts->input_dev);
+ if (error) {
+ dev_err(&ts->client->dev,
+ "Failed to register input device: %d", error);
+ return error;
+ }
+
+ return 0;
+}
+
+/**
+ * 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;
+
+ ts->swapped_x_y = device_property_read_bool(&ts->client->dev,
+ "touchscreen-swapped-x-y");
+ ts->inverted_x = device_property_read_bool(&ts->client->dev,
+ "touchscreen-inverted-x");
+ ts->inverted_y = device_property_read_bool(&ts->client->dev,
+ "touchscreen-inverted-y");
+
+ goodix_read_config(ts);
+
+ error = goodix_request_input_dev(ts);
+ if (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
+ *
+ * @ts: 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);
+ if (error)
+ goto err_release_cfg;
+ }
+
+ goodix_configure_dev(ts);
+
+err_release_cfg:
+ release_firmware(cfg);
+ complete_all(&ts->firmware_loading_complete);
+}
+
+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);
+
+ error = goodix_get_gpio_config(ts);
+ if (error)
+ return error;
+
+ if (ts->gpiod_int && ts->gpiod_rst) {
+ /* 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) {
+ 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->cfg_len = goodix_get_cfg_len(ts->id);
+
+ if (ts->gpiod_int && ts->gpiod_rst) {
+ /* update device config */
+ ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL,
+ "goodix_%d_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->gpiod_int && ts->gpiod_rst)
+ 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;
+
+ /* We need gpio pins to suspend/resume */
+ if (!ts->gpiod_int || !ts->gpiod_rst) {
+ disable_irq(client->irq);
+ return 0;
+ }
+
+ wait_for_completion(&ts->firmware_loading_complete);
+
+ /* 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 = gpiod_direction_output(ts->gpiod_int, 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");
+ gpiod_direction_input(ts->gpiod_int);
+ 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);
+ int error;
+
+ if (!ts->gpiod_int || !ts->gpiod_rst) {
+ enable_irq(client->irq);
+ return 0;
+ }
+
+ /*
+ * Exit sleep mode by outputting HIGH level to INT pin
+ * for 2ms~5ms.
+ */
+ error = gpiod_direction_output(ts->gpiod_int, 1);
+ if (error)
+ return error;
+
+ usleep_range(2000, 5000);
+
+ error = goodix_int_sync(ts);
+ 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,gt911" },
+ { .compatible = "goodix,gt9110" },
+ { .compatible = "goodix,gt912" },
+ { .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");