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 switch (ares->type) {
826 case ACPI_RESOURCE_TYPE_GPIO:
827 gpio = &ares->data.gpio;
828 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
829 if (ts->gpio_int_idx == -1) {
830 ts->gpio_int_idx = ts->gpio_count;
832 dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n");
833 ts->gpio_int_idx = -2;
846 * This function gets called in case we fail to get the irq GPIO directly
847 * because the ACPI tables lack GPIO-name to APCI _CRS index mappings
848 * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data).
849 * In that case we add our own mapping and then goodix_get_gpio_config()
850 * retries to get the GPIOs based on the added mapping.
852 static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts)
854 const struct acpi_gpio_mapping *gpio_mapping = NULL;
855 struct device *dev = &ts->client->dev;
856 LIST_HEAD(resources);
860 ts->gpio_int_idx = -1;
861 ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources,
862 goodix_resource, ts);
864 dev_err(dev, "Error getting ACPI resources: %d\n", ret);
868 acpi_dev_free_resource_list(&resources);
871 * CHT devices should have a GpioInt + a regular GPIO ACPI resource.
872 * Some CHT devices have a bug (where the also is bogus Interrupt
873 * resource copied from a previous BYT based generation). i2c-core-acpi
874 * will use the non-working Interrupt resource, fix this up.
876 if (soc_intel_is_cht() && ts->gpio_count == 2 && ts->gpio_int_idx != -1) {
877 irq = acpi_dev_gpio_irq_get(ACPI_COMPANION(dev), 0);
878 if (irq > 0 && irq != ts->client->irq) {
879 dev_warn(dev, "Overriding IRQ %d -> %d\n", ts->client->irq, irq);
880 ts->client->irq = irq;
884 if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) {
885 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO;
886 gpio_mapping = acpi_goodix_int_first_gpios;
887 } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) {
888 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO;
889 gpio_mapping = acpi_goodix_int_last_gpios;
890 } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 &&
891 acpi_has_method(ACPI_HANDLE(dev), "INTI") &&
892 acpi_has_method(ACPI_HANDLE(dev), "INTO")) {
893 dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n");
894 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD;
895 gpio_mapping = acpi_goodix_reset_only_gpios;
896 } else if (soc_intel_is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) {
897 dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n");
898 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO;
899 gpio_mapping = acpi_goodix_int_last_gpios;
901 dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n",
902 ts->gpio_count, ts->gpio_int_idx);
907 * Normally we put the reset pin in input / high-impedance mode to save
908 * power. But some x86/ACPI boards don't have a pull-up, so for the ACPI
909 * case, leave the pin as is. This results in the pin not being touched
910 * at all on x86/ACPI boards, except when needed for error-recover.
912 ts->gpiod_rst_flags = GPIOD_ASIS;
914 return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping);
917 static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts)
921 #endif /* CONFIG_X86 && CONFIG_ACPI */
924 * goodix_get_gpio_config - Get GPIO config from ACPI/DT
926 * @ts: goodix_ts_data pointer
928 static int goodix_get_gpio_config(struct goodix_ts_data *ts)
932 struct gpio_desc *gpiod;
933 bool added_acpi_mappings = false;
937 dev = &ts->client->dev;
940 * By default we request the reset pin as input, leaving it in
941 * high-impedance when not resetting the controller to save power.
943 ts->gpiod_rst_flags = GPIOD_IN;
945 ts->avdd28 = devm_regulator_get(dev, "AVDD28");
946 if (IS_ERR(ts->avdd28)) {
947 error = PTR_ERR(ts->avdd28);
948 if (error != -EPROBE_DEFER)
950 "Failed to get AVDD28 regulator: %d\n", error);
954 ts->vddio = devm_regulator_get(dev, "VDDIO");
955 if (IS_ERR(ts->vddio)) {
956 error = PTR_ERR(ts->vddio);
957 if (error != -EPROBE_DEFER)
959 "Failed to get VDDIO regulator: %d\n", error);
964 /* Get the interrupt GPIO pin number */
965 gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN);
967 error = PTR_ERR(gpiod);
968 if (error != -EPROBE_DEFER)
969 dev_err(dev, "Failed to get %s GPIO: %d\n",
970 GOODIX_GPIO_INT_NAME, error);
973 if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) {
974 added_acpi_mappings = true;
975 if (goodix_add_acpi_gpio_mappings(ts) == 0)
976 goto retry_get_irq_gpio;
979 ts->gpiod_int = gpiod;
981 /* Get the reset line GPIO pin number */
982 gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, ts->gpiod_rst_flags);
984 error = PTR_ERR(gpiod);
985 if (error != -EPROBE_DEFER)
986 dev_err(dev, "Failed to get %s GPIO: %d\n",
987 GOODIX_GPIO_RST_NAME, error);
991 ts->gpiod_rst = gpiod;
993 switch (ts->irq_pin_access_method) {
994 case IRQ_PIN_ACCESS_ACPI_GPIO:
996 * We end up here if goodix_add_acpi_gpio_mappings() has
997 * called devm_acpi_dev_add_driver_gpios() because the ACPI
998 * tables did not contain name to index mappings.
999 * Check that we successfully got both GPIOs after we've
1000 * added our own acpi_gpio_mapping and if we did not get both
1001 * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE.
1003 if (!ts->gpiod_int || !ts->gpiod_rst)
1004 ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE;
1006 case IRQ_PIN_ACCESS_ACPI_METHOD:
1008 ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE;
1011 if (ts->gpiod_int && ts->gpiod_rst) {
1012 ts->reset_controller_at_probe = true;
1013 ts->load_cfg_from_disk = true;
1014 ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO;
1022 * goodix_read_config - Read the embedded configuration of the panel
1024 * @ts: our goodix_ts_data pointer
1026 * Must be called during probe
1028 static void goodix_read_config(struct goodix_ts_data *ts)
1034 * On controllers where we need to upload the firmware
1035 * (controllers without flash) ts->config already has the config
1036 * at this point and the controller itself does not have it yet!
1038 if (!ts->firmware_name) {
1039 error = goodix_i2c_read(ts->client, ts->chip->config_addr,
1040 ts->config, ts->chip->config_len);
1042 ts->int_trigger_type = GOODIX_INT_TRIGGER;
1043 ts->max_touch_num = GOODIX_MAX_CONTACTS;
1048 ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03;
1049 ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f;
1051 x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]);
1052 y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]);
1053 if (x_max && y_max) {
1054 input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1);
1055 input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1);
1058 ts->chip->calc_config_checksum(ts);
1062 * goodix_read_version - Read goodix touchscreen version
1064 * @ts: our goodix_ts_data pointer
1066 static int goodix_read_version(struct goodix_ts_data *ts)
1070 char id_str[GOODIX_ID_MAX_LEN + 1];
1072 error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf));
1076 memcpy(id_str, buf, GOODIX_ID_MAX_LEN);
1077 id_str[GOODIX_ID_MAX_LEN] = 0;
1078 strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1);
1080 ts->version = get_unaligned_le16(&buf[4]);
1082 dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id,
1089 * goodix_i2c_test - I2C test function to check if the device answers.
1091 * @client: the i2c client
1093 static int goodix_i2c_test(struct i2c_client *client)
1099 while (retry++ < 2) {
1100 error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1);
1111 * goodix_configure_dev - Finish device initialization
1113 * @ts: our goodix_ts_data pointer
1115 * Must be called from probe to finish initialization of the device.
1116 * Contains the common initialization code for both devices that
1117 * declare gpio pins and devices that do not. It is either called
1118 * directly from probe or from request_firmware_wait callback.
1120 static int goodix_configure_dev(struct goodix_ts_data *ts)
1125 ts->int_trigger_type = GOODIX_INT_TRIGGER;
1126 ts->max_touch_num = GOODIX_MAX_CONTACTS;
1128 ts->input_dev = devm_input_allocate_device(&ts->client->dev);
1129 if (!ts->input_dev) {
1130 dev_err(&ts->client->dev, "Failed to allocate input device.");
1134 ts->input_dev->name = "Goodix Capacitive TouchScreen";
1135 ts->input_dev->phys = "input/ts";
1136 ts->input_dev->id.bustype = BUS_I2C;
1137 ts->input_dev->id.vendor = 0x0416;
1138 if (kstrtou16(ts->id, 10, &ts->input_dev->id.product))
1139 ts->input_dev->id.product = 0x1001;
1140 ts->input_dev->id.version = ts->version;
1142 ts->input_dev->keycode = ts->keymap;
1143 ts->input_dev->keycodesize = sizeof(ts->keymap[0]);
1144 ts->input_dev->keycodemax = GOODIX_MAX_KEYS;
1146 /* Capacitive Windows/Home button on some devices */
1147 for (i = 0; i < GOODIX_MAX_KEYS; ++i) {
1149 ts->keymap[i] = KEY_LEFTMETA;
1151 ts->keymap[i] = KEY_F1 + (i - 1);
1153 input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]);
1156 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X);
1157 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y);
1158 input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
1159 input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
1161 /* Read configuration and apply touchscreen parameters */
1162 goodix_read_config(ts);
1164 /* Try overriding touchscreen parameters via device properties */
1165 touchscreen_parse_properties(ts->input_dev, true, &ts->prop);
1167 if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) {
1168 dev_err(&ts->client->dev,
1169 "Invalid config (%d, %d, %d), using defaults\n",
1170 ts->prop.max_x, ts->prop.max_y, ts->max_touch_num);
1171 ts->prop.max_x = GOODIX_MAX_WIDTH - 1;
1172 ts->prop.max_y = GOODIX_MAX_HEIGHT - 1;
1173 ts->max_touch_num = GOODIX_MAX_CONTACTS;
1174 input_abs_set_max(ts->input_dev,
1175 ABS_MT_POSITION_X, ts->prop.max_x);
1176 input_abs_set_max(ts->input_dev,
1177 ABS_MT_POSITION_Y, ts->prop.max_y);
1180 if (dmi_check_system(nine_bytes_report)) {
1181 ts->contact_size = 9;
1183 dev_dbg(&ts->client->dev,
1184 "Non-standard 9-bytes report format quirk\n");
1187 if (dmi_check_system(inverted_x_screen)) {
1188 ts->prop.invert_x = true;
1189 dev_dbg(&ts->client->dev,
1190 "Applying 'inverted x screen' quirk\n");
1193 error = input_mt_init_slots(ts->input_dev, ts->max_touch_num,
1194 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
1196 dev_err(&ts->client->dev,
1197 "Failed to initialize MT slots: %d", error);
1201 error = input_register_device(ts->input_dev);
1203 dev_err(&ts->client->dev,
1204 "Failed to register input device: %d", error);
1209 * Create the input_pen device before goodix_request_irq() calls
1210 * devm_request_threaded_irq() so that the devm framework frees
1211 * it after disabling the irq.
1212 * Unfortunately there is no way to detect if the touchscreen has pen
1213 * support, so registering the dev is delayed till the first pen event.
1215 error = goodix_create_pen_input(ts);
1219 ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT;
1220 error = goodix_request_irq(ts);
1222 dev_err(&ts->client->dev, "request IRQ failed: %d\n", error);
1230 * goodix_config_cb - Callback to finish device init
1232 * @cfg: firmware config
1233 * @ctx: our goodix_ts_data pointer
1235 * request_firmware_wait callback that finishes
1236 * initialization of the device.
1238 static void goodix_config_cb(const struct firmware *cfg, void *ctx)
1240 struct goodix_ts_data *ts = ctx;
1243 if (ts->firmware_name) {
1245 goto err_release_cfg;
1247 error = goodix_check_cfg(ts, cfg->data, cfg->size);
1249 goto err_release_cfg;
1251 memcpy(ts->config, cfg->data, cfg->size);
1253 /* send device configuration to the firmware */
1254 error = goodix_send_cfg(ts, cfg->data, cfg->size);
1256 goto err_release_cfg;
1259 goodix_configure_dev(ts);
1262 release_firmware(cfg);
1263 complete_all(&ts->firmware_loading_complete);
1266 static void goodix_disable_regulators(void *arg)
1268 struct goodix_ts_data *ts = arg;
1270 regulator_disable(ts->vddio);
1271 regulator_disable(ts->avdd28);
1274 static int goodix_ts_probe(struct i2c_client *client,
1275 const struct i2c_device_id *id)
1277 struct goodix_ts_data *ts;
1278 const char *cfg_name;
1281 dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr);
1283 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1284 dev_err(&client->dev, "I2C check functionality failed.\n");
1288 ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
1292 ts->client = client;
1293 i2c_set_clientdata(client, ts);
1294 init_completion(&ts->firmware_loading_complete);
1295 ts->contact_size = GOODIX_CONTACT_SIZE;
1297 error = goodix_get_gpio_config(ts);
1301 /* power up the controller */
1302 error = regulator_enable(ts->avdd28);
1304 dev_err(&client->dev,
1305 "Failed to enable AVDD28 regulator: %d\n",
1310 error = regulator_enable(ts->vddio);
1312 dev_err(&client->dev,
1313 "Failed to enable VDDIO regulator: %d\n",
1315 regulator_disable(ts->avdd28);
1319 error = devm_add_action_or_reset(&client->dev,
1320 goodix_disable_regulators, ts);
1325 if (ts->reset_controller_at_probe) {
1326 /* reset the controller */
1327 error = goodix_reset(ts);
1332 error = goodix_i2c_test(client);
1334 if (!ts->reset_controller_at_probe &&
1335 ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) {
1336 /* Retry after a controller reset */
1337 ts->reset_controller_at_probe = true;
1340 dev_err(&client->dev, "I2C communication failure: %d\n", error);
1344 error = goodix_firmware_check(ts);
1348 error = goodix_read_version(ts);
1352 ts->chip = goodix_get_chip_data(ts->id);
1354 if (ts->load_cfg_from_disk) {
1355 /* update device config */
1356 error = device_property_read_string(&client->dev,
1357 "goodix,config-name",
1360 snprintf(ts->cfg_name, sizeof(ts->cfg_name),
1361 "/*(DEBLOBBED)*/", cfg_name);
1363 snprintf(ts->cfg_name, sizeof(ts->cfg_name),
1364 "/*(DEBLOBBED)*/", ts->id);
1366 error = reject_firmware_nowait(THIS_MODULE, true, ts->cfg_name,
1367 &client->dev, GFP_KERNEL, ts,
1370 dev_err(&client->dev,
1371 "Failed to invoke firmware loader: %d\n",
1378 error = goodix_configure_dev(ts);
1386 static int goodix_ts_remove(struct i2c_client *client)
1388 struct goodix_ts_data *ts = i2c_get_clientdata(client);
1390 if (ts->load_cfg_from_disk)
1391 wait_for_completion(&ts->firmware_loading_complete);
1396 static int __maybe_unused goodix_suspend(struct device *dev)
1398 struct i2c_client *client = to_i2c_client(dev);
1399 struct goodix_ts_data *ts = i2c_get_clientdata(client);
1402 if (ts->load_cfg_from_disk)
1403 wait_for_completion(&ts->firmware_loading_complete);
1405 /* We need gpio pins to suspend/resume */
1406 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
1407 disable_irq(client->irq);
1411 /* Free IRQ as IRQ pin is used as output in the suspend sequence */
1412 goodix_free_irq(ts);
1414 /* Save reference (calibration) info if necessary */
1415 goodix_save_bak_ref(ts);
1417 /* Output LOW on the INT pin for 5 ms */
1418 error = goodix_irq_direction_output(ts, 0);
1420 goodix_request_irq(ts);
1424 usleep_range(5000, 6000);
1426 error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND,
1427 GOODIX_CMD_SCREEN_OFF);
1429 goodix_irq_direction_input(ts);
1430 goodix_request_irq(ts);
1435 * The datasheet specifies that the interval between sending screen-off
1436 * command and wake-up should be longer than 58 ms. To avoid waking up
1437 * sooner, delay 58ms here.
1443 static int __maybe_unused goodix_resume(struct device *dev)
1445 struct i2c_client *client = to_i2c_client(dev);
1446 struct goodix_ts_data *ts = i2c_get_clientdata(client);
1450 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
1451 enable_irq(client->irq);
1456 * Exit sleep mode by outputting HIGH level to INT pin
1459 error = goodix_irq_direction_output(ts, 1);
1463 usleep_range(2000, 5000);
1465 error = goodix_int_sync(ts);
1469 error = goodix_i2c_read(ts->client, ts->chip->config_addr,
1471 if (!error && config_ver != ts->config[0])
1472 dev_info(dev, "Config version mismatch %d != %d, resetting controller\n",
1473 config_ver, ts->config[0]);
1475 if (error != 0 || config_ver != ts->config[0]) {
1476 error = goodix_reset(ts);
1480 error = goodix_send_cfg(ts, ts->config, ts->chip->config_len);
1485 error = goodix_request_irq(ts);
1492 static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume);
1494 static const struct i2c_device_id goodix_ts_id[] = {
1495 { "GDIX1001:00", 0 },
1498 MODULE_DEVICE_TABLE(i2c, goodix_ts_id);
1501 static const struct acpi_device_id goodix_acpi_match[] = {
1506 MODULE_DEVICE_TABLE(acpi, goodix_acpi_match);
1510 static const struct of_device_id goodix_of_match[] = {
1511 { .compatible = "goodix,gt1151" },
1512 { .compatible = "goodix,gt5663" },
1513 { .compatible = "goodix,gt5688" },
1514 { .compatible = "goodix,gt911" },
1515 { .compatible = "goodix,gt9110" },
1516 { .compatible = "goodix,gt912" },
1517 { .compatible = "goodix,gt9147" },
1518 { .compatible = "goodix,gt917s" },
1519 { .compatible = "goodix,gt927" },
1520 { .compatible = "goodix,gt9271" },
1521 { .compatible = "goodix,gt928" },
1522 { .compatible = "goodix,gt9286" },
1523 { .compatible = "goodix,gt967" },
1526 MODULE_DEVICE_TABLE(of, goodix_of_match);
1529 static struct i2c_driver goodix_ts_driver = {
1530 .probe = goodix_ts_probe,
1531 .remove = goodix_ts_remove,
1532 .id_table = goodix_ts_id,
1534 .name = "Goodix-TS",
1535 .acpi_match_table = ACPI_PTR(goodix_acpi_match),
1536 .of_match_table = of_match_ptr(goodix_of_match),
1537 .pm = &goodix_pm_ops,
1540 module_i2c_driver(goodix_ts_driver);
1542 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
1543 MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>");
1544 MODULE_DESCRIPTION("Goodix touchscreen driver");
1545 MODULE_LICENSE("GPL v2");