1 // SPDX-License-Identifier: GPL-2.0-only
3 * Driver for Goodix Touchscreens
5 * Copyright (c) 2014 Red Hat Inc.
6 * Copyright (c) 2015 K. Merker <merker@debian.org>
8 * This code is based on gt9xx.c authored by andrew@goodix.com:
10 * 2010 - 2012 Goodix Technology.
14 #include <linux/kernel.h>
15 #include <linux/dmi.h>
16 #include <linux/firmware.h>
17 #include <linux/module.h>
18 #include <linux/delay.h>
19 #include <linux/irq.h>
20 #include <linux/interrupt.h>
21 #include <linux/platform_data/x86/soc.h>
22 #include <linux/slab.h>
23 #include <linux/acpi.h>
25 #include <asm/unaligned.h>
28 #define GOODIX_GPIO_INT_NAME "irq"
29 #define GOODIX_GPIO_RST_NAME "reset"
31 #define GOODIX_MAX_HEIGHT 4096
32 #define GOODIX_MAX_WIDTH 4096
33 #define GOODIX_INT_TRIGGER 1
34 #define GOODIX_CONTACT_SIZE 8
35 #define GOODIX_MAX_CONTACT_SIZE 9
36 #define GOODIX_MAX_CONTACTS 10
38 #define GOODIX_CONFIG_MIN_LENGTH 186
39 #define GOODIX_CONFIG_911_LENGTH 186
40 #define GOODIX_CONFIG_967_LENGTH 228
41 #define GOODIX_CONFIG_GT9X_LENGTH 240
43 #define GOODIX_BUFFER_STATUS_READY BIT(7)
44 #define GOODIX_HAVE_KEY BIT(4)
45 #define GOODIX_BUFFER_STATUS_TIMEOUT 20
47 #define RESOLUTION_LOC 1
48 #define MAX_CONTACTS_LOC 5
51 /* Our special handling for GPIO accesses through ACPI is x86 specific */
52 #if defined CONFIG_X86 && defined CONFIG_ACPI
53 #define ACPI_GPIO_SUPPORT
56 struct goodix_chip_id {
58 const struct goodix_chip_data *data;
61 static int goodix_check_cfg_8(struct goodix_ts_data *ts,
62 const u8 *cfg, int len);
63 static int goodix_check_cfg_16(struct goodix_ts_data *ts,
64 const u8 *cfg, int len);
65 static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts);
66 static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts);
68 static const struct goodix_chip_data gt1x_chip_data = {
69 .config_addr = GOODIX_GT1X_REG_CONFIG_DATA,
70 .config_len = GOODIX_CONFIG_GT9X_LENGTH,
71 .check_config = goodix_check_cfg_16,
72 .calc_config_checksum = goodix_calc_cfg_checksum_16,
75 static const struct goodix_chip_data gt911_chip_data = {
76 .config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
77 .config_len = GOODIX_CONFIG_911_LENGTH,
78 .check_config = goodix_check_cfg_8,
79 .calc_config_checksum = goodix_calc_cfg_checksum_8,
82 static const struct goodix_chip_data gt967_chip_data = {
83 .config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
84 .config_len = GOODIX_CONFIG_967_LENGTH,
85 .check_config = goodix_check_cfg_8,
86 .calc_config_checksum = goodix_calc_cfg_checksum_8,
89 static const struct goodix_chip_data gt9x_chip_data = {
90 .config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
91 .config_len = GOODIX_CONFIG_GT9X_LENGTH,
92 .check_config = goodix_check_cfg_8,
93 .calc_config_checksum = goodix_calc_cfg_checksum_8,
96 static const struct goodix_chip_id goodix_chip_ids[] = {
97 { .id = "1151", .data = >1x_chip_data },
98 { .id = "5663", .data = >1x_chip_data },
99 { .id = "5688", .data = >1x_chip_data },
100 { .id = "917S", .data = >1x_chip_data },
101 { .id = "9286", .data = >1x_chip_data },
103 { .id = "911", .data = >911_chip_data },
104 { .id = "9271", .data = >911_chip_data },
105 { .id = "9110", .data = >911_chip_data },
106 { .id = "9111", .data = >911_chip_data },
107 { .id = "927", .data = >911_chip_data },
108 { .id = "928", .data = >911_chip_data },
110 { .id = "912", .data = >967_chip_data },
111 { .id = "9147", .data = >967_chip_data },
112 { .id = "967", .data = >967_chip_data },
116 static const unsigned long goodix_irq_flags[] = {
117 IRQ_TYPE_EDGE_RISING,
118 IRQ_TYPE_EDGE_FALLING,
123 static const struct dmi_system_id nine_bytes_report[] = {
124 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
126 .ident = "Lenovo YogaBook",
127 /* YB1-X91L/F and YB1-X90L/F */
129 DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9")
137 * Those tablets have their x coordinate inverted
139 static const struct dmi_system_id inverted_x_screen[] = {
140 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
142 .ident = "Cube I15-TC",
144 DMI_MATCH(DMI_SYS_VENDOR, "Cube"),
145 DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC")
153 * goodix_i2c_read - read data from a register of the i2c slave device.
155 * @client: i2c device.
156 * @reg: the register to read from.
157 * @buf: raw write data buffer.
158 * @len: length of the buffer to write
160 int goodix_i2c_read(struct i2c_client *client, u16 reg, u8 *buf, int len)
162 struct i2c_msg msgs[2];
163 __be16 wbuf = cpu_to_be16(reg);
167 msgs[0].addr = client->addr;
169 msgs[0].buf = (u8 *)&wbuf;
171 msgs[1].flags = I2C_M_RD;
172 msgs[1].addr = client->addr;
176 ret = i2c_transfer(client->adapter, msgs, 2);
178 ret = (ret == ARRAY_SIZE(msgs) ? 0 : -EIO);
181 dev_err(&client->dev, "Error reading %d bytes from 0x%04x: %d\n",
187 * goodix_i2c_write - write data to a register of the i2c slave device.
189 * @client: i2c device.
190 * @reg: the register to write to.
191 * @buf: raw data buffer to write.
192 * @len: length of the buffer to write
194 int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, int len)
200 addr_buf = kmalloc(len + 2, GFP_KERNEL);
204 addr_buf[0] = reg >> 8;
205 addr_buf[1] = reg & 0xFF;
206 memcpy(&addr_buf[2], buf, len);
209 msg.addr = client->addr;
213 ret = i2c_transfer(client->adapter, &msg, 1);
215 ret = (ret == 1 ? 0 : -EIO);
220 dev_err(&client->dev, "Error writing %d bytes to 0x%04x: %d\n",
225 int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value)
227 return goodix_i2c_write(client, reg, &value, sizeof(value));
230 static const struct goodix_chip_data *goodix_get_chip_data(const char *id)
234 for (i = 0; goodix_chip_ids[i].id; i++) {
235 if (!strcmp(goodix_chip_ids[i].id, id))
236 return goodix_chip_ids[i].data;
239 return >9x_chip_data;
242 static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
244 unsigned long max_timeout;
247 u16 addr = GOODIX_READ_COOR_ADDR;
249 * We are going to read 1-byte header,
250 * ts->contact_size * max(1, touch_num) bytes of coordinates
251 * and 1-byte footer which contains the touch-key code.
253 const int header_contact_keycode_size = 1 + ts->contact_size + 1;
256 * The 'buffer status' bit, which indicates that the data is valid, is
257 * not set as soon as the interrupt is raised, but slightly after.
258 * This takes around 10 ms to happen, so we poll for 20 ms.
260 max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT);
262 error = goodix_i2c_read(ts->client, addr, data,
263 header_contact_keycode_size);
267 if (data[0] & GOODIX_BUFFER_STATUS_READY) {
268 touch_num = data[0] & 0x0f;
269 if (touch_num > ts->max_touch_num)
273 addr += header_contact_keycode_size;
274 data += header_contact_keycode_size;
275 error = goodix_i2c_read(ts->client,
286 if (data[0] == 0 && ts->firmware_name) {
287 if (goodix_handle_fw_request(ts))
291 usleep_range(1000, 2000); /* Poll every 1 - 2 ms */
292 } while (time_before(jiffies, max_timeout));
295 * The Goodix panel will send spurious interrupts after a
296 * 'finger up' event, which will always cause a timeout.
301 static int goodix_create_pen_input(struct goodix_ts_data *ts)
303 struct device *dev = &ts->client->dev;
304 struct input_dev *input;
306 input = devm_input_allocate_device(dev);
310 input_copy_abs(input, ABS_X, ts->input_dev, ABS_MT_POSITION_X);
311 input_copy_abs(input, ABS_Y, ts->input_dev, ABS_MT_POSITION_Y);
313 * The resolution of these touchscreens is about 10 units/mm, the actual
314 * resolution does not matter much since we set INPUT_PROP_DIRECT.
315 * Userspace wants something here though, so just set it to 10 units/mm.
317 input_abs_set_res(input, ABS_X, 10);
318 input_abs_set_res(input, ABS_Y, 10);
319 input_set_abs_params(input, ABS_PRESSURE, 0, 255, 0, 0);
321 input_set_capability(input, EV_KEY, BTN_TOUCH);
322 input_set_capability(input, EV_KEY, BTN_TOOL_PEN);
323 input_set_capability(input, EV_KEY, BTN_STYLUS);
324 input_set_capability(input, EV_KEY, BTN_STYLUS2);
325 __set_bit(INPUT_PROP_DIRECT, input->propbit);
327 input->name = "Goodix Active Pen";
328 input->phys = "input/pen";
329 input->id.bustype = BUS_I2C;
330 input->id.vendor = 0x0416;
331 if (kstrtou16(ts->id, 10, &input->id.product))
332 input->id.product = 0x1001;
333 input->id.version = ts->version;
335 ts->input_pen = input;
339 static void goodix_ts_report_pen_down(struct goodix_ts_data *ts, u8 *data)
341 int input_x, input_y, input_w, error;
344 if (!ts->pen_input_registered) {
345 error = input_register_device(ts->input_pen);
346 ts->pen_input_registered = (error == 0) ? 1 : error;
349 if (ts->pen_input_registered < 0)
352 if (ts->contact_size == 9) {
353 input_x = get_unaligned_le16(&data[4]);
354 input_y = get_unaligned_le16(&data[6]);
355 input_w = get_unaligned_le16(&data[8]);
357 input_x = get_unaligned_le16(&data[2]);
358 input_y = get_unaligned_le16(&data[4]);
359 input_w = get_unaligned_le16(&data[6]);
362 touchscreen_report_pos(ts->input_pen, &ts->prop, input_x, input_y, false);
363 input_report_abs(ts->input_pen, ABS_PRESSURE, input_w);
365 input_report_key(ts->input_pen, BTN_TOUCH, 1);
366 input_report_key(ts->input_pen, BTN_TOOL_PEN, 1);
368 if (data[0] & GOODIX_HAVE_KEY) {
369 key_value = data[1 + ts->contact_size];
370 input_report_key(ts->input_pen, BTN_STYLUS, key_value & 0x10);
371 input_report_key(ts->input_pen, BTN_STYLUS2, key_value & 0x20);
373 input_report_key(ts->input_pen, BTN_STYLUS, 0);
374 input_report_key(ts->input_pen, BTN_STYLUS2, 0);
377 input_sync(ts->input_pen);
380 static void goodix_ts_report_pen_up(struct goodix_ts_data *ts)
385 input_report_key(ts->input_pen, BTN_TOUCH, 0);
386 input_report_key(ts->input_pen, BTN_TOOL_PEN, 0);
387 input_report_key(ts->input_pen, BTN_STYLUS, 0);
388 input_report_key(ts->input_pen, BTN_STYLUS2, 0);
390 input_sync(ts->input_pen);
393 static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data)
395 int id = coor_data[0] & 0x0F;
396 int input_x = get_unaligned_le16(&coor_data[1]);
397 int input_y = get_unaligned_le16(&coor_data[3]);
398 int input_w = get_unaligned_le16(&coor_data[5]);
400 input_mt_slot(ts->input_dev, id);
401 input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
402 touchscreen_report_pos(ts->input_dev, &ts->prop,
403 input_x, input_y, true);
404 input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w);
405 input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
408 static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data)
410 int id = coor_data[1] & 0x0F;
411 int input_x = get_unaligned_le16(&coor_data[3]);
412 int input_y = get_unaligned_le16(&coor_data[5]);
413 int input_w = get_unaligned_le16(&coor_data[7]);
415 input_mt_slot(ts->input_dev, id);
416 input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
417 touchscreen_report_pos(ts->input_dev, &ts->prop,
418 input_x, input_y, true);
419 input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w);
420 input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
423 static void goodix_ts_release_keys(struct goodix_ts_data *ts)
427 for (i = 0; i < GOODIX_MAX_KEYS; i++)
428 input_report_key(ts->input_dev, ts->keymap[i], 0);
431 static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data)
437 if (data[0] & GOODIX_HAVE_KEY) {
438 touch_num = data[0] & 0x0f;
439 key_value = data[1 + ts->contact_size * touch_num];
440 for (i = 0; i < GOODIX_MAX_KEYS; i++)
441 if (key_value & BIT(i))
442 input_report_key(ts->input_dev,
445 goodix_ts_release_keys(ts);
450 * goodix_process_events - Process incoming events
452 * @ts: our goodix_ts_data pointer
454 * Called when the IRQ is triggered. Read the current device state, and push
455 * the input events to the user space.
457 static void goodix_process_events(struct goodix_ts_data *ts)
459 u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
463 touch_num = goodix_ts_read_input_report(ts, point_data);
467 /* The pen being down is always reported as a single touch */
468 if (touch_num == 1 && (point_data[1] & 0x80)) {
469 goodix_ts_report_pen_down(ts, point_data);
470 goodix_ts_release_keys(ts);
471 goto sync; /* Release any previously registered touches */
473 goodix_ts_report_pen_up(ts);
476 goodix_ts_report_key(ts, point_data);
478 for (i = 0; i < touch_num; i++)
479 if (ts->contact_size == 9)
480 goodix_ts_report_touch_9b(ts,
481 &point_data[1 + ts->contact_size * i]);
483 goodix_ts_report_touch_8b(ts,
484 &point_data[1 + ts->contact_size * i]);
487 input_mt_sync_frame(ts->input_dev);
488 input_sync(ts->input_dev);
492 * goodix_ts_irq_handler - The IRQ handler
494 * @irq: interrupt number.
495 * @dev_id: private data pointer.
497 static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id)
499 struct goodix_ts_data *ts = dev_id;
501 goodix_process_events(ts);
502 goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0);
507 static void goodix_free_irq(struct goodix_ts_data *ts)
509 devm_free_irq(&ts->client->dev, ts->client->irq, ts);
512 static int goodix_request_irq(struct goodix_ts_data *ts)
514 return devm_request_threaded_irq(&ts->client->dev, ts->client->irq,
515 NULL, goodix_ts_irq_handler,
516 ts->irq_flags, ts->client->name, ts);
519 static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len)
521 int i, raw_cfg_len = len - 2;
524 for (i = 0; i < raw_cfg_len; i++)
526 check_sum = (~check_sum) + 1;
527 if (check_sum != cfg[raw_cfg_len]) {
528 dev_err(&ts->client->dev,
529 "The checksum of the config fw is not correct");
533 if (cfg[raw_cfg_len + 1] != 1) {
534 dev_err(&ts->client->dev,
535 "Config fw must have Config_Fresh register set");
542 static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts)
544 int i, raw_cfg_len = ts->chip->config_len - 2;
547 for (i = 0; i < raw_cfg_len; i++)
548 check_sum += ts->config[i];
549 check_sum = (~check_sum) + 1;
551 ts->config[raw_cfg_len] = check_sum;
552 ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */
555 static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg,
558 int i, raw_cfg_len = len - 3;
561 for (i = 0; i < raw_cfg_len; i += 2)
562 check_sum += get_unaligned_be16(&cfg[i]);
563 check_sum = (~check_sum) + 1;
564 if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) {
565 dev_err(&ts->client->dev,
566 "The checksum of the config fw is not correct");
570 if (cfg[raw_cfg_len + 2] != 1) {
571 dev_err(&ts->client->dev,
572 "Config fw must have Config_Fresh register set");
579 static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts)
581 int i, raw_cfg_len = ts->chip->config_len - 3;
584 for (i = 0; i < raw_cfg_len; i += 2)
585 check_sum += get_unaligned_be16(&ts->config[i]);
586 check_sum = (~check_sum) + 1;
588 put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]);
589 ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */
593 * goodix_check_cfg - Checks if config fw is valid
595 * @ts: goodix_ts_data pointer
596 * @cfg: firmware config data
597 * @len: config data length
599 static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len)
601 if (len < GOODIX_CONFIG_MIN_LENGTH ||
602 len > GOODIX_CONFIG_MAX_LENGTH) {
603 dev_err(&ts->client->dev,
604 "The length of the config fw is not correct");
608 return ts->chip->check_config(ts, cfg, len);
612 * goodix_send_cfg - Write fw config to device
614 * @ts: goodix_ts_data pointer
615 * @cfg: config firmware to write to device
616 * @len: config data length
618 int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len)
622 error = goodix_check_cfg(ts, cfg, len);
626 error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len);
630 dev_dbg(&ts->client->dev, "Config sent successfully.");
632 /* Let the firmware reconfigure itself, so sleep for 10ms */
633 usleep_range(10000, 11000);
638 #ifdef ACPI_GPIO_SUPPORT
639 static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts)
641 acpi_handle handle = ACPI_HANDLE(&ts->client->dev);
644 status = acpi_evaluate_object(handle, "INTI", NULL, NULL);
645 return ACPI_SUCCESS(status) ? 0 : -EIO;
648 static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value)
650 acpi_handle handle = ACPI_HANDLE(&ts->client->dev);
653 status = acpi_execute_simple_method(handle, "INTO", value);
654 return ACPI_SUCCESS(status) ? 0 : -EIO;
657 static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts)
659 dev_err(&ts->client->dev,
660 "%s called on device without ACPI support\n", __func__);
664 static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value)
666 dev_err(&ts->client->dev,
667 "%s called on device without ACPI support\n", __func__);
672 static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value)
674 switch (ts->irq_pin_access_method) {
675 case IRQ_PIN_ACCESS_NONE:
676 dev_err(&ts->client->dev,
677 "%s called without an irq_pin_access_method set\n",
680 case IRQ_PIN_ACCESS_GPIO:
681 return gpiod_direction_output(ts->gpiod_int, value);
682 case IRQ_PIN_ACCESS_ACPI_GPIO:
684 * The IRQ pin triggers on a falling edge, so its gets marked
685 * as active-low, use output_raw to avoid the value inversion.
687 return gpiod_direction_output_raw(ts->gpiod_int, value);
688 case IRQ_PIN_ACCESS_ACPI_METHOD:
689 return goodix_pin_acpi_output_method(ts, value);
692 return -EINVAL; /* Never reached */
695 static int goodix_irq_direction_input(struct goodix_ts_data *ts)
697 switch (ts->irq_pin_access_method) {
698 case IRQ_PIN_ACCESS_NONE:
699 dev_err(&ts->client->dev,
700 "%s called without an irq_pin_access_method set\n",
703 case IRQ_PIN_ACCESS_GPIO:
704 return gpiod_direction_input(ts->gpiod_int);
705 case IRQ_PIN_ACCESS_ACPI_GPIO:
706 return gpiod_direction_input(ts->gpiod_int);
707 case IRQ_PIN_ACCESS_ACPI_METHOD:
708 return goodix_pin_acpi_direction_input(ts);
711 return -EINVAL; /* Never reached */
714 int goodix_int_sync(struct goodix_ts_data *ts)
718 error = goodix_irq_direction_output(ts, 0);
722 msleep(50); /* T5: 50ms */
724 error = goodix_irq_direction_input(ts);
731 dev_err(&ts->client->dev, "Controller irq sync failed.\n");
736 * goodix_reset_no_int_sync - Reset device, leaving interrupt line in output mode
738 * @ts: goodix_ts_data pointer
740 int goodix_reset_no_int_sync(struct goodix_ts_data *ts)
744 /* begin select I2C slave addr */
745 error = gpiod_direction_output(ts->gpiod_rst, 0);
749 msleep(20); /* T2: > 10ms */
751 /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */
752 error = goodix_irq_direction_output(ts, ts->client->addr == 0x14);
756 usleep_range(100, 2000); /* T3: > 100us */
758 error = gpiod_direction_output(ts->gpiod_rst, 1);
762 usleep_range(6000, 10000); /* T4: > 5ms */
765 * Put the reset pin back in to input / high-impedance mode to save
766 * power. Only do this in the non ACPI case since some ACPI boards
767 * don't have a pull-up, so there the reset pin must stay active-high.
769 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_GPIO) {
770 error = gpiod_direction_input(ts->gpiod_rst);
778 dev_err(&ts->client->dev, "Controller reset failed.\n");
783 * goodix_reset - Reset device during power on
785 * @ts: goodix_ts_data pointer
787 static int goodix_reset(struct goodix_ts_data *ts)
791 error = goodix_reset_no_int_sync(ts);
795 return goodix_int_sync(ts);
798 #ifdef ACPI_GPIO_SUPPORT
799 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
800 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
802 static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = {
803 { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 },
804 { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 },
808 static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = {
809 { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 },
810 { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 },
814 static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = {
815 { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 },
819 static int goodix_resource(struct acpi_resource *ares, void *data)
821 struct goodix_ts_data *ts = data;
822 struct device *dev = &ts->client->dev;
823 struct acpi_resource_gpio *gpio;
825 if (acpi_gpio_get_irq_resource(ares, &gpio)) {
826 if (ts->gpio_int_idx == -1) {
827 ts->gpio_int_idx = ts->gpio_count;
829 dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n");
830 ts->gpio_int_idx = -2;
833 } else if (acpi_gpio_get_io_resource(ares, &gpio))
840 * This function gets called in case we fail to get the irq GPIO directly
841 * because the ACPI tables lack GPIO-name to APCI _CRS index mappings
842 * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data).
843 * In that case we add our own mapping and then goodix_get_gpio_config()
844 * retries to get the GPIOs based on the added mapping.
846 static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts)
848 const struct acpi_gpio_mapping *gpio_mapping = NULL;
849 struct device *dev = &ts->client->dev;
850 LIST_HEAD(resources);
854 ts->gpio_int_idx = -1;
855 ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources,
856 goodix_resource, ts);
858 dev_err(dev, "Error getting ACPI resources: %d\n", ret);
862 acpi_dev_free_resource_list(&resources);
865 * CHT devices should have a GpioInt + a regular GPIO ACPI resource.
866 * Some CHT devices have a bug (where the also is bogus Interrupt
867 * resource copied from a previous BYT based generation). i2c-core-acpi
868 * will use the non-working Interrupt resource, fix this up.
870 if (soc_intel_is_cht() && ts->gpio_count == 2 && ts->gpio_int_idx != -1) {
871 irq = acpi_dev_gpio_irq_get(ACPI_COMPANION(dev), 0);
872 if (irq > 0 && irq != ts->client->irq) {
873 dev_warn(dev, "Overriding IRQ %d -> %d\n", ts->client->irq, irq);
874 ts->client->irq = irq;
878 if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) {
879 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO;
880 gpio_mapping = acpi_goodix_int_first_gpios;
881 } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) {
882 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO;
883 gpio_mapping = acpi_goodix_int_last_gpios;
884 } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 &&
885 acpi_has_method(ACPI_HANDLE(dev), "INTI") &&
886 acpi_has_method(ACPI_HANDLE(dev), "INTO")) {
887 dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n");
888 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD;
889 gpio_mapping = acpi_goodix_reset_only_gpios;
890 } else if (soc_intel_is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) {
891 dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n");
892 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO;
893 gpio_mapping = acpi_goodix_int_last_gpios;
895 dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n",
896 ts->gpio_count, ts->gpio_int_idx);
901 * Normally we put the reset pin in input / high-impedance mode to save
902 * power. But some x86/ACPI boards don't have a pull-up, so for the ACPI
903 * case, leave the pin as is. This results in the pin not being touched
904 * at all on x86/ACPI boards, except when needed for error-recover.
906 ts->gpiod_rst_flags = GPIOD_ASIS;
908 return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping);
911 static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts)
915 #endif /* CONFIG_X86 && CONFIG_ACPI */
918 * goodix_get_gpio_config - Get GPIO config from ACPI/DT
920 * @ts: goodix_ts_data pointer
922 static int goodix_get_gpio_config(struct goodix_ts_data *ts)
926 struct gpio_desc *gpiod;
927 bool added_acpi_mappings = false;
931 dev = &ts->client->dev;
934 * By default we request the reset pin as input, leaving it in
935 * high-impedance when not resetting the controller to save power.
937 ts->gpiod_rst_flags = GPIOD_IN;
939 ts->avdd28 = devm_regulator_get(dev, "AVDD28");
940 if (IS_ERR(ts->avdd28)) {
941 error = PTR_ERR(ts->avdd28);
942 if (error != -EPROBE_DEFER)
944 "Failed to get AVDD28 regulator: %d\n", error);
948 ts->vddio = devm_regulator_get(dev, "VDDIO");
949 if (IS_ERR(ts->vddio)) {
950 error = PTR_ERR(ts->vddio);
951 if (error != -EPROBE_DEFER)
953 "Failed to get VDDIO regulator: %d\n", error);
958 /* Get the interrupt GPIO pin number */
959 gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN);
961 error = PTR_ERR(gpiod);
962 if (error != -EPROBE_DEFER)
963 dev_err(dev, "Failed to get %s GPIO: %d\n",
964 GOODIX_GPIO_INT_NAME, error);
967 if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) {
968 added_acpi_mappings = true;
969 if (goodix_add_acpi_gpio_mappings(ts) == 0)
970 goto retry_get_irq_gpio;
973 ts->gpiod_int = gpiod;
975 /* Get the reset line GPIO pin number */
976 gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, ts->gpiod_rst_flags);
978 error = PTR_ERR(gpiod);
979 if (error != -EPROBE_DEFER)
980 dev_err(dev, "Failed to get %s GPIO: %d\n",
981 GOODIX_GPIO_RST_NAME, error);
985 ts->gpiod_rst = gpiod;
987 switch (ts->irq_pin_access_method) {
988 case IRQ_PIN_ACCESS_ACPI_GPIO:
990 * We end up here if goodix_add_acpi_gpio_mappings() has
991 * called devm_acpi_dev_add_driver_gpios() because the ACPI
992 * tables did not contain name to index mappings.
993 * Check that we successfully got both GPIOs after we've
994 * added our own acpi_gpio_mapping and if we did not get both
995 * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE.
997 if (!ts->gpiod_int || !ts->gpiod_rst)
998 ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE;
1000 case IRQ_PIN_ACCESS_ACPI_METHOD:
1002 ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE;
1005 if (ts->gpiod_int && ts->gpiod_rst) {
1006 ts->reset_controller_at_probe = true;
1007 ts->load_cfg_from_disk = true;
1008 ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO;
1016 * goodix_read_config - Read the embedded configuration of the panel
1018 * @ts: our goodix_ts_data pointer
1020 * Must be called during probe
1022 static void goodix_read_config(struct goodix_ts_data *ts)
1028 * On controllers where we need to upload the firmware
1029 * (controllers without flash) ts->config already has the config
1030 * at this point and the controller itself does not have it yet!
1032 if (!ts->firmware_name) {
1033 error = goodix_i2c_read(ts->client, ts->chip->config_addr,
1034 ts->config, ts->chip->config_len);
1036 ts->int_trigger_type = GOODIX_INT_TRIGGER;
1037 ts->max_touch_num = GOODIX_MAX_CONTACTS;
1042 ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03;
1043 ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f;
1045 x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]);
1046 y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]);
1047 if (x_max && y_max) {
1048 input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1);
1049 input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1);
1052 ts->chip->calc_config_checksum(ts);
1056 * goodix_read_version - Read goodix touchscreen version
1058 * @ts: our goodix_ts_data pointer
1060 static int goodix_read_version(struct goodix_ts_data *ts)
1064 char id_str[GOODIX_ID_MAX_LEN + 1];
1066 error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf));
1070 memcpy(id_str, buf, GOODIX_ID_MAX_LEN);
1071 id_str[GOODIX_ID_MAX_LEN] = 0;
1072 strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1);
1074 ts->version = get_unaligned_le16(&buf[4]);
1076 dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id,
1083 * goodix_i2c_test - I2C test function to check if the device answers.
1085 * @client: the i2c client
1087 static int goodix_i2c_test(struct i2c_client *client)
1093 while (retry++ < 2) {
1094 error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1);
1105 * goodix_configure_dev - Finish device initialization
1107 * @ts: our goodix_ts_data pointer
1109 * Must be called from probe to finish initialization of the device.
1110 * Contains the common initialization code for both devices that
1111 * declare gpio pins and devices that do not. It is either called
1112 * directly from probe or from request_firmware_wait callback.
1114 static int goodix_configure_dev(struct goodix_ts_data *ts)
1119 ts->int_trigger_type = GOODIX_INT_TRIGGER;
1120 ts->max_touch_num = GOODIX_MAX_CONTACTS;
1122 ts->input_dev = devm_input_allocate_device(&ts->client->dev);
1123 if (!ts->input_dev) {
1124 dev_err(&ts->client->dev, "Failed to allocate input device.");
1128 ts->input_dev->name = "Goodix Capacitive TouchScreen";
1129 ts->input_dev->phys = "input/ts";
1130 ts->input_dev->id.bustype = BUS_I2C;
1131 ts->input_dev->id.vendor = 0x0416;
1132 if (kstrtou16(ts->id, 10, &ts->input_dev->id.product))
1133 ts->input_dev->id.product = 0x1001;
1134 ts->input_dev->id.version = ts->version;
1136 ts->input_dev->keycode = ts->keymap;
1137 ts->input_dev->keycodesize = sizeof(ts->keymap[0]);
1138 ts->input_dev->keycodemax = GOODIX_MAX_KEYS;
1140 /* Capacitive Windows/Home button on some devices */
1141 for (i = 0; i < GOODIX_MAX_KEYS; ++i) {
1143 ts->keymap[i] = KEY_LEFTMETA;
1145 ts->keymap[i] = KEY_F1 + (i - 1);
1147 input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]);
1150 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X);
1151 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y);
1152 input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
1153 input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
1155 /* Read configuration and apply touchscreen parameters */
1156 goodix_read_config(ts);
1158 /* Try overriding touchscreen parameters via device properties */
1159 touchscreen_parse_properties(ts->input_dev, true, &ts->prop);
1161 if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) {
1162 dev_err(&ts->client->dev,
1163 "Invalid config (%d, %d, %d), using defaults\n",
1164 ts->prop.max_x, ts->prop.max_y, ts->max_touch_num);
1165 ts->prop.max_x = GOODIX_MAX_WIDTH - 1;
1166 ts->prop.max_y = GOODIX_MAX_HEIGHT - 1;
1167 ts->max_touch_num = GOODIX_MAX_CONTACTS;
1168 input_abs_set_max(ts->input_dev,
1169 ABS_MT_POSITION_X, ts->prop.max_x);
1170 input_abs_set_max(ts->input_dev,
1171 ABS_MT_POSITION_Y, ts->prop.max_y);
1174 if (dmi_check_system(nine_bytes_report)) {
1175 ts->contact_size = 9;
1177 dev_dbg(&ts->client->dev,
1178 "Non-standard 9-bytes report format quirk\n");
1181 if (dmi_check_system(inverted_x_screen)) {
1182 ts->prop.invert_x = true;
1183 dev_dbg(&ts->client->dev,
1184 "Applying 'inverted x screen' quirk\n");
1187 error = input_mt_init_slots(ts->input_dev, ts->max_touch_num,
1188 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
1190 dev_err(&ts->client->dev,
1191 "Failed to initialize MT slots: %d", error);
1195 error = input_register_device(ts->input_dev);
1197 dev_err(&ts->client->dev,
1198 "Failed to register input device: %d", error);
1203 * Create the input_pen device before goodix_request_irq() calls
1204 * devm_request_threaded_irq() so that the devm framework frees
1205 * it after disabling the irq.
1206 * Unfortunately there is no way to detect if the touchscreen has pen
1207 * support, so registering the dev is delayed till the first pen event.
1209 error = goodix_create_pen_input(ts);
1213 ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT;
1214 error = goodix_request_irq(ts);
1216 dev_err(&ts->client->dev, "request IRQ failed: %d\n", error);
1224 * goodix_config_cb - Callback to finish device init
1226 * @cfg: firmware config
1227 * @ctx: our goodix_ts_data pointer
1229 * request_firmware_wait callback that finishes
1230 * initialization of the device.
1232 static void goodix_config_cb(const struct firmware *cfg, void *ctx)
1234 struct goodix_ts_data *ts = ctx;
1237 if (ts->firmware_name) {
1239 goto err_release_cfg;
1241 error = goodix_check_cfg(ts, cfg->data, cfg->size);
1243 goto err_release_cfg;
1245 memcpy(ts->config, cfg->data, cfg->size);
1247 /* send device configuration to the firmware */
1248 error = goodix_send_cfg(ts, cfg->data, cfg->size);
1250 goto err_release_cfg;
1253 goodix_configure_dev(ts);
1256 release_firmware(cfg);
1257 complete_all(&ts->firmware_loading_complete);
1260 static void goodix_disable_regulators(void *arg)
1262 struct goodix_ts_data *ts = arg;
1264 regulator_disable(ts->vddio);
1265 regulator_disable(ts->avdd28);
1268 static int goodix_ts_probe(struct i2c_client *client,
1269 const struct i2c_device_id *id)
1271 struct goodix_ts_data *ts;
1272 const char *cfg_name;
1275 dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr);
1277 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1278 dev_err(&client->dev, "I2C check functionality failed.\n");
1282 ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
1286 ts->client = client;
1287 i2c_set_clientdata(client, ts);
1288 init_completion(&ts->firmware_loading_complete);
1289 ts->contact_size = GOODIX_CONTACT_SIZE;
1291 error = goodix_get_gpio_config(ts);
1295 /* power up the controller */
1296 error = regulator_enable(ts->avdd28);
1298 dev_err(&client->dev,
1299 "Failed to enable AVDD28 regulator: %d\n",
1304 error = regulator_enable(ts->vddio);
1306 dev_err(&client->dev,
1307 "Failed to enable VDDIO regulator: %d\n",
1309 regulator_disable(ts->avdd28);
1313 error = devm_add_action_or_reset(&client->dev,
1314 goodix_disable_regulators, ts);
1319 if (ts->reset_controller_at_probe) {
1320 /* reset the controller */
1321 error = goodix_reset(ts);
1326 error = goodix_i2c_test(client);
1328 if (!ts->reset_controller_at_probe &&
1329 ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) {
1330 /* Retry after a controller reset */
1331 ts->reset_controller_at_probe = true;
1334 dev_err(&client->dev, "I2C communication failure: %d\n", error);
1338 error = goodix_firmware_check(ts);
1342 error = goodix_read_version(ts);
1346 ts->chip = goodix_get_chip_data(ts->id);
1348 if (ts->load_cfg_from_disk) {
1349 /* update device config */
1350 error = device_property_read_string(&client->dev,
1351 "goodix,config-name",
1354 snprintf(ts->cfg_name, sizeof(ts->cfg_name),
1355 "goodix/%s", cfg_name);
1357 snprintf(ts->cfg_name, sizeof(ts->cfg_name),
1358 "goodix_%s_cfg.bin", ts->id);
1360 error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name,
1361 &client->dev, GFP_KERNEL, ts,
1364 dev_err(&client->dev,
1365 "Failed to invoke firmware loader: %d\n",
1372 error = goodix_configure_dev(ts);
1380 static int goodix_ts_remove(struct i2c_client *client)
1382 struct goodix_ts_data *ts = i2c_get_clientdata(client);
1384 if (ts->load_cfg_from_disk)
1385 wait_for_completion(&ts->firmware_loading_complete);
1390 static int __maybe_unused goodix_suspend(struct device *dev)
1392 struct i2c_client *client = to_i2c_client(dev);
1393 struct goodix_ts_data *ts = i2c_get_clientdata(client);
1396 if (ts->load_cfg_from_disk)
1397 wait_for_completion(&ts->firmware_loading_complete);
1399 /* We need gpio pins to suspend/resume */
1400 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
1401 disable_irq(client->irq);
1405 /* Free IRQ as IRQ pin is used as output in the suspend sequence */
1406 goodix_free_irq(ts);
1408 /* Save reference (calibration) info if necessary */
1409 goodix_save_bak_ref(ts);
1411 /* Output LOW on the INT pin for 5 ms */
1412 error = goodix_irq_direction_output(ts, 0);
1414 goodix_request_irq(ts);
1418 usleep_range(5000, 6000);
1420 error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND,
1421 GOODIX_CMD_SCREEN_OFF);
1423 goodix_irq_direction_input(ts);
1424 goodix_request_irq(ts);
1429 * The datasheet specifies that the interval between sending screen-off
1430 * command and wake-up should be longer than 58 ms. To avoid waking up
1431 * sooner, delay 58ms here.
1437 static int __maybe_unused goodix_resume(struct device *dev)
1439 struct i2c_client *client = to_i2c_client(dev);
1440 struct goodix_ts_data *ts = i2c_get_clientdata(client);
1444 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
1445 enable_irq(client->irq);
1450 * Exit sleep mode by outputting HIGH level to INT pin
1453 error = goodix_irq_direction_output(ts, 1);
1457 usleep_range(2000, 5000);
1459 error = goodix_int_sync(ts);
1463 error = goodix_i2c_read(ts->client, ts->chip->config_addr,
1465 if (!error && config_ver != ts->config[0])
1466 dev_info(dev, "Config version mismatch %d != %d, resetting controller\n",
1467 config_ver, ts->config[0]);
1469 if (error != 0 || config_ver != ts->config[0]) {
1470 error = goodix_reset(ts);
1474 error = goodix_send_cfg(ts, ts->config, ts->chip->config_len);
1479 error = goodix_request_irq(ts);
1486 static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume);
1488 static const struct i2c_device_id goodix_ts_id[] = {
1489 { "GDIX1001:00", 0 },
1492 MODULE_DEVICE_TABLE(i2c, goodix_ts_id);
1495 static const struct acpi_device_id goodix_acpi_match[] = {
1500 MODULE_DEVICE_TABLE(acpi, goodix_acpi_match);
1504 static const struct of_device_id goodix_of_match[] = {
1505 { .compatible = "goodix,gt1151" },
1506 { .compatible = "goodix,gt5663" },
1507 { .compatible = "goodix,gt5688" },
1508 { .compatible = "goodix,gt911" },
1509 { .compatible = "goodix,gt9110" },
1510 { .compatible = "goodix,gt912" },
1511 { .compatible = "goodix,gt9147" },
1512 { .compatible = "goodix,gt917s" },
1513 { .compatible = "goodix,gt927" },
1514 { .compatible = "goodix,gt9271" },
1515 { .compatible = "goodix,gt928" },
1516 { .compatible = "goodix,gt9286" },
1517 { .compatible = "goodix,gt967" },
1520 MODULE_DEVICE_TABLE(of, goodix_of_match);
1523 static struct i2c_driver goodix_ts_driver = {
1524 .probe = goodix_ts_probe,
1525 .remove = goodix_ts_remove,
1526 .id_table = goodix_ts_id,
1528 .name = "Goodix-TS",
1529 .acpi_match_table = ACPI_PTR(goodix_acpi_match),
1530 .of_match_table = of_match_ptr(goodix_of_match),
1531 .pm = &goodix_pm_ops,
1534 module_i2c_driver(goodix_ts_driver);
1536 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
1537 MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>");
1538 MODULE_DESCRIPTION("Goodix touchscreen driver");
1539 MODULE_LICENSE("GPL v2");