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/slab.h>
22 #include <linux/acpi.h>
24 #include <asm/unaligned.h>
27 #define GOODIX_GPIO_INT_NAME "irq"
28 #define GOODIX_GPIO_RST_NAME "reset"
30 #define GOODIX_MAX_HEIGHT 4096
31 #define GOODIX_MAX_WIDTH 4096
32 #define GOODIX_INT_TRIGGER 1
33 #define GOODIX_CONTACT_SIZE 8
34 #define GOODIX_MAX_CONTACT_SIZE 9
35 #define GOODIX_MAX_CONTACTS 10
37 #define GOODIX_CONFIG_MIN_LENGTH 186
38 #define GOODIX_CONFIG_911_LENGTH 186
39 #define GOODIX_CONFIG_967_LENGTH 228
40 #define GOODIX_CONFIG_GT9X_LENGTH 240
42 #define GOODIX_BUFFER_STATUS_READY BIT(7)
43 #define GOODIX_HAVE_KEY BIT(4)
44 #define GOODIX_BUFFER_STATUS_TIMEOUT 20
46 #define RESOLUTION_LOC 1
47 #define MAX_CONTACTS_LOC 5
50 /* Our special handling for GPIO accesses through ACPI is x86 specific */
51 #if defined CONFIG_X86 && defined CONFIG_ACPI
52 #define ACPI_GPIO_SUPPORT
55 struct goodix_chip_id {
57 const struct goodix_chip_data *data;
60 static int goodix_check_cfg_8(struct goodix_ts_data *ts,
61 const u8 *cfg, int len);
62 static int goodix_check_cfg_16(struct goodix_ts_data *ts,
63 const u8 *cfg, int len);
64 static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts);
65 static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts);
67 static const struct goodix_chip_data gt1x_chip_data = {
68 .config_addr = GOODIX_GT1X_REG_CONFIG_DATA,
69 .config_len = GOODIX_CONFIG_GT9X_LENGTH,
70 .check_config = goodix_check_cfg_16,
71 .calc_config_checksum = goodix_calc_cfg_checksum_16,
74 static const struct goodix_chip_data gt911_chip_data = {
75 .config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
76 .config_len = GOODIX_CONFIG_911_LENGTH,
77 .check_config = goodix_check_cfg_8,
78 .calc_config_checksum = goodix_calc_cfg_checksum_8,
81 static const struct goodix_chip_data gt967_chip_data = {
82 .config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
83 .config_len = GOODIX_CONFIG_967_LENGTH,
84 .check_config = goodix_check_cfg_8,
85 .calc_config_checksum = goodix_calc_cfg_checksum_8,
88 static const struct goodix_chip_data gt9x_chip_data = {
89 .config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
90 .config_len = GOODIX_CONFIG_GT9X_LENGTH,
91 .check_config = goodix_check_cfg_8,
92 .calc_config_checksum = goodix_calc_cfg_checksum_8,
95 static const struct goodix_chip_id goodix_chip_ids[] = {
96 { .id = "1151", .data = >1x_chip_data },
97 { .id = "1158", .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);
177 return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0);
181 * goodix_i2c_write - write data to a register of the i2c slave device.
183 * @client: i2c device.
184 * @reg: the register to write to.
185 * @buf: raw data buffer to write.
186 * @len: length of the buffer to write
188 int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, int len)
194 addr_buf = kmalloc(len + 2, GFP_KERNEL);
198 addr_buf[0] = reg >> 8;
199 addr_buf[1] = reg & 0xFF;
200 memcpy(&addr_buf[2], buf, len);
203 msg.addr = client->addr;
207 ret = i2c_transfer(client->adapter, &msg, 1);
209 return ret < 0 ? ret : (ret != 1 ? -EIO : 0);
212 int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value)
214 return goodix_i2c_write(client, reg, &value, sizeof(value));
217 static const struct goodix_chip_data *goodix_get_chip_data(const char *id)
221 for (i = 0; goodix_chip_ids[i].id; i++) {
222 if (!strcmp(goodix_chip_ids[i].id, id))
223 return goodix_chip_ids[i].data;
226 return >9x_chip_data;
229 static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
231 unsigned long max_timeout;
234 u16 addr = GOODIX_READ_COOR_ADDR;
236 * We are going to read 1-byte header,
237 * ts->contact_size * max(1, touch_num) bytes of coordinates
238 * and 1-byte footer which contains the touch-key code.
240 const int header_contact_keycode_size = 1 + ts->contact_size + 1;
243 * The 'buffer status' bit, which indicates that the data is valid, is
244 * not set as soon as the interrupt is raised, but slightly after.
245 * This takes around 10 ms to happen, so we poll for 20 ms.
247 max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT);
249 error = goodix_i2c_read(ts->client, addr, data,
250 header_contact_keycode_size);
252 dev_err(&ts->client->dev, "I2C transfer error: %d\n",
257 if (data[0] & GOODIX_BUFFER_STATUS_READY) {
258 touch_num = data[0] & 0x0f;
259 if (touch_num > ts->max_touch_num)
263 addr += header_contact_keycode_size;
264 data += header_contact_keycode_size;
265 error = goodix_i2c_read(ts->client,
276 usleep_range(1000, 2000); /* Poll every 1 - 2 ms */
277 } while (time_before(jiffies, max_timeout));
280 * The Goodix panel will send spurious interrupts after a
281 * 'finger up' event, which will always cause a timeout.
286 static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data)
288 int id = coor_data[0] & 0x0F;
289 int input_x = get_unaligned_le16(&coor_data[1]);
290 int input_y = get_unaligned_le16(&coor_data[3]);
291 int input_w = get_unaligned_le16(&coor_data[5]);
293 input_mt_slot(ts->input_dev, id);
294 input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
295 touchscreen_report_pos(ts->input_dev, &ts->prop,
296 input_x, input_y, true);
297 input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w);
298 input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
301 static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data)
303 int id = coor_data[1] & 0x0F;
304 int input_x = get_unaligned_le16(&coor_data[3]);
305 int input_y = get_unaligned_le16(&coor_data[5]);
306 int input_w = get_unaligned_le16(&coor_data[7]);
308 input_mt_slot(ts->input_dev, id);
309 input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
310 touchscreen_report_pos(ts->input_dev, &ts->prop,
311 input_x, input_y, true);
312 input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w);
313 input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
316 static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data)
322 if (data[0] & GOODIX_HAVE_KEY) {
323 touch_num = data[0] & 0x0f;
324 key_value = data[1 + ts->contact_size * touch_num];
325 for (i = 0; i < GOODIX_MAX_KEYS; i++)
326 if (key_value & BIT(i))
327 input_report_key(ts->input_dev,
330 for (i = 0; i < GOODIX_MAX_KEYS; i++)
331 input_report_key(ts->input_dev, ts->keymap[i], 0);
336 * goodix_process_events - Process incoming events
338 * @ts: our goodix_ts_data pointer
340 * Called when the IRQ is triggered. Read the current device state, and push
341 * the input events to the user space.
343 static void goodix_process_events(struct goodix_ts_data *ts)
345 u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
349 touch_num = goodix_ts_read_input_report(ts, point_data);
353 goodix_ts_report_key(ts, point_data);
355 for (i = 0; i < touch_num; i++)
356 if (ts->contact_size == 9)
357 goodix_ts_report_touch_9b(ts,
358 &point_data[1 + ts->contact_size * i]);
360 goodix_ts_report_touch_8b(ts,
361 &point_data[1 + ts->contact_size * i]);
363 input_mt_sync_frame(ts->input_dev);
364 input_sync(ts->input_dev);
368 * goodix_ts_irq_handler - The IRQ handler
370 * @irq: interrupt number.
371 * @dev_id: private data pointer.
373 static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id)
375 struct goodix_ts_data *ts = dev_id;
377 goodix_process_events(ts);
379 if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0)
380 dev_err(&ts->client->dev, "I2C write end_cmd error\n");
385 static void goodix_free_irq(struct goodix_ts_data *ts)
387 devm_free_irq(&ts->client->dev, ts->client->irq, ts);
390 static int goodix_request_irq(struct goodix_ts_data *ts)
392 return devm_request_threaded_irq(&ts->client->dev, ts->client->irq,
393 NULL, goodix_ts_irq_handler,
394 ts->irq_flags, ts->client->name, ts);
397 static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len)
399 int i, raw_cfg_len = len - 2;
402 for (i = 0; i < raw_cfg_len; i++)
404 check_sum = (~check_sum) + 1;
405 if (check_sum != cfg[raw_cfg_len]) {
406 dev_err(&ts->client->dev,
407 "The checksum of the config fw is not correct");
411 if (cfg[raw_cfg_len + 1] != 1) {
412 dev_err(&ts->client->dev,
413 "Config fw must have Config_Fresh register set");
420 static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts)
422 int i, raw_cfg_len = ts->chip->config_len - 2;
425 for (i = 0; i < raw_cfg_len; i++)
426 check_sum += ts->config[i];
427 check_sum = (~check_sum) + 1;
429 ts->config[raw_cfg_len] = check_sum;
430 ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */
433 static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg,
436 int i, raw_cfg_len = len - 3;
439 for (i = 0; i < raw_cfg_len; i += 2)
440 check_sum += get_unaligned_be16(&cfg[i]);
441 check_sum = (~check_sum) + 1;
442 if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) {
443 dev_err(&ts->client->dev,
444 "The checksum of the config fw is not correct");
448 if (cfg[raw_cfg_len + 2] != 1) {
449 dev_err(&ts->client->dev,
450 "Config fw must have Config_Fresh register set");
457 static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts)
459 int i, raw_cfg_len = ts->chip->config_len - 3;
462 for (i = 0; i < raw_cfg_len; i += 2)
463 check_sum += get_unaligned_be16(&ts->config[i]);
464 check_sum = (~check_sum) + 1;
466 put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]);
467 ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */
471 * goodix_check_cfg - Checks if config fw is valid
473 * @ts: goodix_ts_data pointer
474 * @cfg: firmware config data
475 * @len: config data length
477 static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len)
479 if (len < GOODIX_CONFIG_MIN_LENGTH ||
480 len > GOODIX_CONFIG_MAX_LENGTH) {
481 dev_err(&ts->client->dev,
482 "The length of the config fw is not correct");
486 return ts->chip->check_config(ts, cfg, len);
490 * goodix_send_cfg - Write fw config to device
492 * @ts: goodix_ts_data pointer
493 * @cfg: config firmware to write to device
494 * @len: config data length
496 int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len)
500 error = goodix_check_cfg(ts, cfg, len);
504 error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len);
506 dev_err(&ts->client->dev, "Failed to write config data: %d",
510 dev_dbg(&ts->client->dev, "Config sent successfully.");
512 /* Let the firmware reconfigure itself, so sleep for 10ms */
513 usleep_range(10000, 11000);
518 #ifdef ACPI_GPIO_SUPPORT
519 static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts)
521 acpi_handle handle = ACPI_HANDLE(&ts->client->dev);
524 status = acpi_evaluate_object(handle, "INTI", NULL, NULL);
525 return ACPI_SUCCESS(status) ? 0 : -EIO;
528 static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value)
530 acpi_handle handle = ACPI_HANDLE(&ts->client->dev);
533 status = acpi_execute_simple_method(handle, "INTO", value);
534 return ACPI_SUCCESS(status) ? 0 : -EIO;
537 static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts)
539 dev_err(&ts->client->dev,
540 "%s called on device without ACPI support\n", __func__);
544 static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value)
546 dev_err(&ts->client->dev,
547 "%s called on device without ACPI support\n", __func__);
552 static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value)
554 switch (ts->irq_pin_access_method) {
555 case IRQ_PIN_ACCESS_NONE:
556 dev_err(&ts->client->dev,
557 "%s called without an irq_pin_access_method set\n",
560 case IRQ_PIN_ACCESS_GPIO:
561 return gpiod_direction_output(ts->gpiod_int, value);
562 case IRQ_PIN_ACCESS_ACPI_GPIO:
564 * The IRQ pin triggers on a falling edge, so its gets marked
565 * as active-low, use output_raw to avoid the value inversion.
567 return gpiod_direction_output_raw(ts->gpiod_int, value);
568 case IRQ_PIN_ACCESS_ACPI_METHOD:
569 return goodix_pin_acpi_output_method(ts, value);
572 return -EINVAL; /* Never reached */
575 static int goodix_irq_direction_input(struct goodix_ts_data *ts)
577 switch (ts->irq_pin_access_method) {
578 case IRQ_PIN_ACCESS_NONE:
579 dev_err(&ts->client->dev,
580 "%s called without an irq_pin_access_method set\n",
583 case IRQ_PIN_ACCESS_GPIO:
584 return gpiod_direction_input(ts->gpiod_int);
585 case IRQ_PIN_ACCESS_ACPI_GPIO:
586 return gpiod_direction_input(ts->gpiod_int);
587 case IRQ_PIN_ACCESS_ACPI_METHOD:
588 return goodix_pin_acpi_direction_input(ts);
591 return -EINVAL; /* Never reached */
594 int goodix_int_sync(struct goodix_ts_data *ts)
598 error = goodix_irq_direction_output(ts, 0);
602 msleep(50); /* T5: 50ms */
604 error = goodix_irq_direction_input(ts);
611 dev_err(&ts->client->dev, "Controller irq sync failed.\n");
616 * goodix_reset_no_int_sync - Reset device, leaving interrupt line in output mode
618 * @ts: goodix_ts_data pointer
620 int goodix_reset_no_int_sync(struct goodix_ts_data *ts)
624 /* begin select I2C slave addr */
625 error = gpiod_direction_output(ts->gpiod_rst, 0);
629 msleep(20); /* T2: > 10ms */
631 /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */
632 error = goodix_irq_direction_output(ts, ts->client->addr == 0x14);
636 usleep_range(100, 2000); /* T3: > 100us */
638 error = gpiod_direction_output(ts->gpiod_rst, 1);
642 usleep_range(6000, 10000); /* T4: > 5ms */
645 * Put the reset pin back in to input / high-impedance mode to save
646 * power. Only do this in the non ACPI case since some ACPI boards
647 * don't have a pull-up, so there the reset pin must stay active-high.
649 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_GPIO) {
650 error = gpiod_direction_input(ts->gpiod_rst);
658 dev_err(&ts->client->dev, "Controller reset failed.\n");
663 * goodix_reset - Reset device during power on
665 * @ts: goodix_ts_data pointer
667 static int goodix_reset(struct goodix_ts_data *ts)
671 error = goodix_reset_no_int_sync(ts);
675 return goodix_int_sync(ts);
678 #ifdef ACPI_GPIO_SUPPORT
679 #include <asm/cpu_device_id.h>
680 #include <asm/intel-family.h>
682 static const struct x86_cpu_id baytrail_cpu_ids[] = {
683 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, },
687 static inline bool is_byt(void)
689 const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids);
694 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
695 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
697 static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = {
698 { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 },
699 { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 },
703 static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = {
704 { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 },
705 { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 },
709 static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = {
710 { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 },
714 static int goodix_resource(struct acpi_resource *ares, void *data)
716 struct goodix_ts_data *ts = data;
717 struct device *dev = &ts->client->dev;
718 struct acpi_resource_gpio *gpio;
720 switch (ares->type) {
721 case ACPI_RESOURCE_TYPE_GPIO:
722 gpio = &ares->data.gpio;
723 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
724 if (ts->gpio_int_idx == -1) {
725 ts->gpio_int_idx = ts->gpio_count;
727 dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n");
728 ts->gpio_int_idx = -2;
741 * This function gets called in case we fail to get the irq GPIO directly
742 * because the ACPI tables lack GPIO-name to APCI _CRS index mappings
743 * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data).
744 * In that case we add our own mapping and then goodix_get_gpio_config()
745 * retries to get the GPIOs based on the added mapping.
747 static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts)
749 const struct acpi_gpio_mapping *gpio_mapping = NULL;
750 struct device *dev = &ts->client->dev;
751 LIST_HEAD(resources);
755 ts->gpio_int_idx = -1;
756 ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources,
757 goodix_resource, ts);
759 dev_err(dev, "Error getting ACPI resources: %d\n", ret);
763 acpi_dev_free_resource_list(&resources);
765 if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) {
766 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO;
767 gpio_mapping = acpi_goodix_int_first_gpios;
768 } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) {
769 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO;
770 gpio_mapping = acpi_goodix_int_last_gpios;
771 } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 &&
772 acpi_has_method(ACPI_HANDLE(dev), "INTI") &&
773 acpi_has_method(ACPI_HANDLE(dev), "INTO")) {
774 dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n");
775 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD;
776 gpio_mapping = acpi_goodix_reset_only_gpios;
777 } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) {
778 dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n");
779 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO;
780 gpio_mapping = acpi_goodix_int_last_gpios;
782 dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n",
783 ts->gpio_count, ts->gpio_int_idx);
788 * Normally we put the reset pin in input / high-impedance mode to save
789 * power. But some x86/ACPI boards don't have a pull-up, so for the ACPI
790 * case, leave the pin as is. This results in the pin not being touched
791 * at all on x86/ACPI boards, except when needed for error-recover.
793 ts->gpiod_rst_flags = GPIOD_ASIS;
795 return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping);
798 static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts)
802 #endif /* CONFIG_X86 && CONFIG_ACPI */
805 * goodix_get_gpio_config - Get GPIO config from ACPI/DT
807 * @ts: goodix_ts_data pointer
809 static int goodix_get_gpio_config(struct goodix_ts_data *ts)
813 struct gpio_desc *gpiod;
814 bool added_acpi_mappings = false;
818 dev = &ts->client->dev;
821 * By default we request the reset pin as input, leaving it in
822 * high-impedance when not resetting the controller to save power.
824 ts->gpiod_rst_flags = GPIOD_IN;
826 ts->avdd28 = devm_regulator_get(dev, "AVDD28");
827 if (IS_ERR(ts->avdd28)) {
828 error = PTR_ERR(ts->avdd28);
829 if (error != -EPROBE_DEFER)
831 "Failed to get AVDD28 regulator: %d\n", error);
835 ts->vddio = devm_regulator_get(dev, "VDDIO");
836 if (IS_ERR(ts->vddio)) {
837 error = PTR_ERR(ts->vddio);
838 if (error != -EPROBE_DEFER)
840 "Failed to get VDDIO regulator: %d\n", error);
845 /* Get the interrupt GPIO pin number */
846 gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN);
848 error = PTR_ERR(gpiod);
849 if (error != -EPROBE_DEFER)
850 dev_dbg(dev, "Failed to get %s GPIO: %d\n",
851 GOODIX_GPIO_INT_NAME, error);
854 if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) {
855 added_acpi_mappings = true;
856 if (goodix_add_acpi_gpio_mappings(ts) == 0)
857 goto retry_get_irq_gpio;
860 ts->gpiod_int = gpiod;
862 /* Get the reset line GPIO pin number */
863 gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, ts->gpiod_rst_flags);
865 error = PTR_ERR(gpiod);
866 if (error != -EPROBE_DEFER)
867 dev_dbg(dev, "Failed to get %s GPIO: %d\n",
868 GOODIX_GPIO_RST_NAME, error);
872 ts->gpiod_rst = gpiod;
874 switch (ts->irq_pin_access_method) {
875 case IRQ_PIN_ACCESS_ACPI_GPIO:
877 * We end up here if goodix_add_acpi_gpio_mappings() has
878 * called devm_acpi_dev_add_driver_gpios() because the ACPI
879 * tables did not contain name to index mappings.
880 * Check that we successfully got both GPIOs after we've
881 * added our own acpi_gpio_mapping and if we did not get both
882 * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE.
884 if (!ts->gpiod_int || !ts->gpiod_rst)
885 ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE;
887 case IRQ_PIN_ACCESS_ACPI_METHOD:
889 ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE;
892 if (ts->gpiod_int && ts->gpiod_rst) {
893 ts->reset_controller_at_probe = true;
894 ts->load_cfg_from_disk = true;
895 ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO;
903 * goodix_read_config - Read the embedded configuration of the panel
905 * @ts: our goodix_ts_data pointer
907 * Must be called during probe
909 static void goodix_read_config(struct goodix_ts_data *ts)
914 error = goodix_i2c_read(ts->client, ts->chip->config_addr,
915 ts->config, ts->chip->config_len);
917 dev_warn(&ts->client->dev, "Error reading config: %d\n",
919 ts->int_trigger_type = GOODIX_INT_TRIGGER;
920 ts->max_touch_num = GOODIX_MAX_CONTACTS;
924 ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03;
925 ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f;
927 x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]);
928 y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]);
929 if (x_max && y_max) {
930 input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1);
931 input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1);
934 ts->chip->calc_config_checksum(ts);
938 * goodix_read_version - Read goodix touchscreen version
940 * @ts: our goodix_ts_data pointer
942 static int goodix_read_version(struct goodix_ts_data *ts)
946 char id_str[GOODIX_ID_MAX_LEN + 1];
948 error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf));
950 dev_err(&ts->client->dev, "read version failed: %d\n", error);
954 memcpy(id_str, buf, GOODIX_ID_MAX_LEN);
955 id_str[GOODIX_ID_MAX_LEN] = 0;
956 strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1);
958 ts->version = get_unaligned_le16(&buf[4]);
960 dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id,
967 * goodix_i2c_test - I2C test function to check if the device answers.
969 * @client: the i2c client
971 static int goodix_i2c_test(struct i2c_client *client)
977 while (retry++ < 2) {
978 error = goodix_i2c_read(client, GOODIX_REG_ID,
983 dev_err(&client->dev, "i2c test failed attempt %d: %d\n",
992 * goodix_configure_dev - Finish device initialization
994 * @ts: our goodix_ts_data pointer
996 * Must be called from probe to finish initialization of the device.
997 * Contains the common initialization code for both devices that
998 * declare gpio pins and devices that do not. It is either called
999 * directly from probe or from request_firmware_wait callback.
1001 static int goodix_configure_dev(struct goodix_ts_data *ts)
1006 ts->int_trigger_type = GOODIX_INT_TRIGGER;
1007 ts->max_touch_num = GOODIX_MAX_CONTACTS;
1009 ts->input_dev = devm_input_allocate_device(&ts->client->dev);
1010 if (!ts->input_dev) {
1011 dev_err(&ts->client->dev, "Failed to allocate input device.");
1015 ts->input_dev->name = "Goodix Capacitive TouchScreen";
1016 ts->input_dev->phys = "input/ts";
1017 ts->input_dev->id.bustype = BUS_I2C;
1018 ts->input_dev->id.vendor = 0x0416;
1019 if (kstrtou16(ts->id, 10, &ts->input_dev->id.product))
1020 ts->input_dev->id.product = 0x1001;
1021 ts->input_dev->id.version = ts->version;
1023 ts->input_dev->keycode = ts->keymap;
1024 ts->input_dev->keycodesize = sizeof(ts->keymap[0]);
1025 ts->input_dev->keycodemax = GOODIX_MAX_KEYS;
1027 /* Capacitive Windows/Home button on some devices */
1028 for (i = 0; i < GOODIX_MAX_KEYS; ++i) {
1030 ts->keymap[i] = KEY_LEFTMETA;
1032 ts->keymap[i] = KEY_F1 + (i - 1);
1034 input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]);
1037 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X);
1038 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y);
1039 input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
1040 input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
1042 /* Read configuration and apply touchscreen parameters */
1043 goodix_read_config(ts);
1045 /* Try overriding touchscreen parameters via device properties */
1046 touchscreen_parse_properties(ts->input_dev, true, &ts->prop);
1048 if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) {
1049 dev_err(&ts->client->dev,
1050 "Invalid config (%d, %d, %d), using defaults\n",
1051 ts->prop.max_x, ts->prop.max_y, ts->max_touch_num);
1052 ts->prop.max_x = GOODIX_MAX_WIDTH - 1;
1053 ts->prop.max_y = GOODIX_MAX_HEIGHT - 1;
1054 ts->max_touch_num = GOODIX_MAX_CONTACTS;
1055 input_abs_set_max(ts->input_dev,
1056 ABS_MT_POSITION_X, ts->prop.max_x);
1057 input_abs_set_max(ts->input_dev,
1058 ABS_MT_POSITION_Y, ts->prop.max_y);
1061 if (dmi_check_system(nine_bytes_report)) {
1062 ts->contact_size = 9;
1064 dev_dbg(&ts->client->dev,
1065 "Non-standard 9-bytes report format quirk\n");
1068 if (dmi_check_system(inverted_x_screen)) {
1069 ts->prop.invert_x = true;
1070 dev_dbg(&ts->client->dev,
1071 "Applying 'inverted x screen' quirk\n");
1074 error = input_mt_init_slots(ts->input_dev, ts->max_touch_num,
1075 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
1077 dev_err(&ts->client->dev,
1078 "Failed to initialize MT slots: %d", error);
1082 error = input_register_device(ts->input_dev);
1084 dev_err(&ts->client->dev,
1085 "Failed to register input device: %d", error);
1089 ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT;
1090 error = goodix_request_irq(ts);
1092 dev_err(&ts->client->dev, "request IRQ failed: %d\n", error);
1100 * goodix_config_cb - Callback to finish device init
1102 * @cfg: firmware config
1103 * @ctx: our goodix_ts_data pointer
1105 * request_firmware_wait callback that finishes
1106 * initialization of the device.
1108 static void goodix_config_cb(const struct firmware *cfg, void *ctx)
1110 struct goodix_ts_data *ts = ctx;
1114 /* send device configuration to the firmware */
1115 error = goodix_send_cfg(ts, cfg->data, cfg->size);
1117 goto err_release_cfg;
1120 goodix_configure_dev(ts);
1123 release_firmware(cfg);
1124 complete_all(&ts->firmware_loading_complete);
1127 static void goodix_disable_regulators(void *arg)
1129 struct goodix_ts_data *ts = arg;
1131 regulator_disable(ts->vddio);
1132 regulator_disable(ts->avdd28);
1135 static int goodix_ts_probe(struct i2c_client *client,
1136 const struct i2c_device_id *id)
1138 struct goodix_ts_data *ts;
1141 dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr);
1143 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1144 dev_err(&client->dev, "I2C check functionality failed.\n");
1148 ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
1152 ts->client = client;
1153 i2c_set_clientdata(client, ts);
1154 init_completion(&ts->firmware_loading_complete);
1155 ts->contact_size = GOODIX_CONTACT_SIZE;
1157 error = goodix_get_gpio_config(ts);
1161 /* power up the controller */
1162 error = regulator_enable(ts->avdd28);
1164 dev_err(&client->dev,
1165 "Failed to enable AVDD28 regulator: %d\n",
1170 error = regulator_enable(ts->vddio);
1172 dev_err(&client->dev,
1173 "Failed to enable VDDIO regulator: %d\n",
1175 regulator_disable(ts->avdd28);
1179 error = devm_add_action_or_reset(&client->dev,
1180 goodix_disable_regulators, ts);
1185 if (ts->reset_controller_at_probe) {
1186 /* reset the controller */
1187 error = goodix_reset(ts);
1192 error = goodix_i2c_test(client);
1194 if (!ts->reset_controller_at_probe &&
1195 ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) {
1196 /* Retry after a controller reset */
1197 ts->reset_controller_at_probe = true;
1200 dev_err(&client->dev, "I2C communication failure: %d\n", error);
1204 error = goodix_read_version(ts);
1206 dev_err(&client->dev, "Read version failed.\n");
1210 ts->chip = goodix_get_chip_data(ts->id);
1212 if (ts->load_cfg_from_disk) {
1213 /* update device config */
1214 ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL,
1215 "goodix_%s_cfg.bin", ts->id);
1219 error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name,
1220 &client->dev, GFP_KERNEL, ts,
1223 dev_err(&client->dev,
1224 "Failed to invoke firmware loader: %d\n",
1231 error = goodix_configure_dev(ts);
1239 static int goodix_ts_remove(struct i2c_client *client)
1241 struct goodix_ts_data *ts = i2c_get_clientdata(client);
1243 if (ts->load_cfg_from_disk)
1244 wait_for_completion(&ts->firmware_loading_complete);
1249 static int __maybe_unused goodix_suspend(struct device *dev)
1251 struct i2c_client *client = to_i2c_client(dev);
1252 struct goodix_ts_data *ts = i2c_get_clientdata(client);
1255 if (ts->load_cfg_from_disk)
1256 wait_for_completion(&ts->firmware_loading_complete);
1258 /* We need gpio pins to suspend/resume */
1259 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
1260 disable_irq(client->irq);
1264 /* Free IRQ as IRQ pin is used as output in the suspend sequence */
1265 goodix_free_irq(ts);
1267 /* Output LOW on the INT pin for 5 ms */
1268 error = goodix_irq_direction_output(ts, 0);
1270 goodix_request_irq(ts);
1274 usleep_range(5000, 6000);
1276 error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND,
1277 GOODIX_CMD_SCREEN_OFF);
1279 dev_err(&ts->client->dev, "Screen off command failed\n");
1280 goodix_irq_direction_input(ts);
1281 goodix_request_irq(ts);
1286 * The datasheet specifies that the interval between sending screen-off
1287 * command and wake-up should be longer than 58 ms. To avoid waking up
1288 * sooner, delay 58ms here.
1294 static int __maybe_unused goodix_resume(struct device *dev)
1296 struct i2c_client *client = to_i2c_client(dev);
1297 struct goodix_ts_data *ts = i2c_get_clientdata(client);
1301 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
1302 enable_irq(client->irq);
1307 * Exit sleep mode by outputting HIGH level to INT pin
1310 error = goodix_irq_direction_output(ts, 1);
1314 usleep_range(2000, 5000);
1316 error = goodix_int_sync(ts);
1320 error = goodix_i2c_read(ts->client, ts->chip->config_addr,
1323 dev_warn(dev, "Error reading config version: %d, resetting controller\n",
1325 else if (config_ver != ts->config[0])
1326 dev_info(dev, "Config version mismatch %d != %d, resetting controller\n",
1327 config_ver, ts->config[0]);
1329 if (error != 0 || config_ver != ts->config[0]) {
1330 error = goodix_reset(ts);
1334 error = goodix_send_cfg(ts, ts->config, ts->chip->config_len);
1339 error = goodix_request_irq(ts);
1346 static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume);
1348 static const struct i2c_device_id goodix_ts_id[] = {
1349 { "GDIX1001:00", 0 },
1352 MODULE_DEVICE_TABLE(i2c, goodix_ts_id);
1355 static const struct acpi_device_id goodix_acpi_match[] = {
1360 MODULE_DEVICE_TABLE(acpi, goodix_acpi_match);
1364 static const struct of_device_id goodix_of_match[] = {
1365 { .compatible = "goodix,gt1151" },
1366 { .compatible = "goodix,gt1158" },
1367 { .compatible = "goodix,gt5663" },
1368 { .compatible = "goodix,gt5688" },
1369 { .compatible = "goodix,gt911" },
1370 { .compatible = "goodix,gt9110" },
1371 { .compatible = "goodix,gt912" },
1372 { .compatible = "goodix,gt9147" },
1373 { .compatible = "goodix,gt917s" },
1374 { .compatible = "goodix,gt927" },
1375 { .compatible = "goodix,gt9271" },
1376 { .compatible = "goodix,gt928" },
1377 { .compatible = "goodix,gt9286" },
1378 { .compatible = "goodix,gt967" },
1381 MODULE_DEVICE_TABLE(of, goodix_of_match);
1384 static struct i2c_driver goodix_ts_driver = {
1385 .probe = goodix_ts_probe,
1386 .remove = goodix_ts_remove,
1387 .id_table = goodix_ts_id,
1389 .name = "Goodix-TS",
1390 .acpi_match_table = ACPI_PTR(goodix_acpi_match),
1391 .of_match_table = of_match_ptr(goodix_of_match),
1392 .pm = &goodix_pm_ops,
1395 module_i2c_driver(goodix_ts_driver);
1397 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
1398 MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>");
1399 MODULE_DESCRIPTION("Goodix touchscreen driver");
1400 MODULE_LICENSE("GPL v2");