2 * Driver for Goodix Touchscreens
4 * Copyright (c) 2014 Red Hat Inc.
5 * Copyright (c) 2015 K. Merker <merker@debian.org>
7 * This code is based on gt9xx.c authored by andrew@goodix.com:
9 * 2010 - 2012 Goodix Technology.
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the Free
15 * Software Foundation; version 2 of the License.
18 #include <linux/kernel.h>
19 #include <linux/dmi.h>
20 #include <linux/firmware.h>
21 #include <linux/gpio/consumer.h>
22 #include <linux/i2c.h>
23 #include <linux/input.h>
24 #include <linux/input/mt.h>
25 #include <linux/module.h>
26 #include <linux/delay.h>
27 #include <linux/irq.h>
28 #include <linux/interrupt.h>
29 #include <linux/slab.h>
30 #include <linux/acpi.h>
32 #include <asm/unaligned.h>
34 struct goodix_ts_data
;
36 struct goodix_chip_data
{
39 int (*check_config
)(struct goodix_ts_data
*, const struct firmware
*);
42 struct goodix_ts_data
{
43 struct i2c_client
*client
;
44 struct input_dev
*input_dev
;
45 const struct goodix_chip_data
*chip
;
51 unsigned int max_touch_num
;
52 unsigned int int_trigger_type
;
53 struct gpio_desc
*gpiod_int
;
54 struct gpio_desc
*gpiod_rst
;
58 struct completion firmware_loading_complete
;
59 unsigned long irq_flags
;
62 #define GOODIX_GPIO_INT_NAME "irq"
63 #define GOODIX_GPIO_RST_NAME "reset"
65 #define GOODIX_MAX_HEIGHT 4096
66 #define GOODIX_MAX_WIDTH 4096
67 #define GOODIX_INT_TRIGGER 1
68 #define GOODIX_CONTACT_SIZE 8
69 #define GOODIX_MAX_CONTACTS 10
71 #define GOODIX_CONFIG_MAX_LENGTH 240
72 #define GOODIX_CONFIG_911_LENGTH 186
73 #define GOODIX_CONFIG_967_LENGTH 228
75 /* Register defines */
76 #define GOODIX_REG_COMMAND 0x8040
77 #define GOODIX_CMD_SCREEN_OFF 0x05
79 #define GOODIX_READ_COOR_ADDR 0x814E
80 #define GOODIX_GT1X_REG_CONFIG_DATA 0x8050
81 #define GOODIX_GT9X_REG_CONFIG_DATA 0x8047
82 #define GOODIX_REG_ID 0x8140
84 #define GOODIX_BUFFER_STATUS_READY BIT(7)
85 #define GOODIX_BUFFER_STATUS_TIMEOUT 20
87 #define RESOLUTION_LOC 1
88 #define MAX_CONTACTS_LOC 5
91 static int goodix_check_cfg_8(struct goodix_ts_data
*ts
,
92 const struct firmware
*cfg
);
93 static int goodix_check_cfg_16(struct goodix_ts_data
*ts
,
94 const struct firmware
*cfg
);
96 static const struct goodix_chip_data gt1x_chip_data
= {
97 .config_addr
= GOODIX_GT1X_REG_CONFIG_DATA
,
98 .config_len
= GOODIX_CONFIG_MAX_LENGTH
,
99 .check_config
= goodix_check_cfg_16
,
102 static const struct goodix_chip_data gt911_chip_data
= {
103 .config_addr
= GOODIX_GT9X_REG_CONFIG_DATA
,
104 .config_len
= GOODIX_CONFIG_911_LENGTH
,
105 .check_config
= goodix_check_cfg_8
,
108 static const struct goodix_chip_data gt967_chip_data
= {
109 .config_addr
= GOODIX_GT9X_REG_CONFIG_DATA
,
110 .config_len
= GOODIX_CONFIG_967_LENGTH
,
111 .check_config
= goodix_check_cfg_8
,
114 static const struct goodix_chip_data gt9x_chip_data
= {
115 .config_addr
= GOODIX_GT9X_REG_CONFIG_DATA
,
116 .config_len
= GOODIX_CONFIG_MAX_LENGTH
,
117 .check_config
= goodix_check_cfg_8
,
120 static const unsigned long goodix_irq_flags
[] = {
121 IRQ_TYPE_EDGE_RISING
,
122 IRQ_TYPE_EDGE_FALLING
,
128 * Those tablets have their coordinates origin at the bottom right
129 * of the tablet, as if rotated 180 degrees
131 static const struct dmi_system_id rotated_screen
[] = {
132 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
134 .ident
= "WinBook TW100",
136 DMI_MATCH(DMI_SYS_VENDOR
, "WinBook"),
137 DMI_MATCH(DMI_PRODUCT_NAME
, "TW100")
141 .ident
= "WinBook TW700",
143 DMI_MATCH(DMI_SYS_VENDOR
, "WinBook"),
144 DMI_MATCH(DMI_PRODUCT_NAME
, "TW700")
152 * goodix_i2c_read - read data from a register of the i2c slave device.
154 * @client: i2c device.
155 * @reg: the register to read from.
156 * @buf: raw write data buffer.
157 * @len: length of the buffer to write
159 static int goodix_i2c_read(struct i2c_client
*client
,
160 u16 reg
, u8
*buf
, int len
)
162 struct i2c_msg msgs
[2];
163 u16 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 static int goodix_i2c_write(struct i2c_client
*client
, u16 reg
, const u8
*buf
,
195 addr_buf
= kmalloc(len
+ 2, GFP_KERNEL
);
199 addr_buf
[0] = reg
>> 8;
200 addr_buf
[1] = reg
& 0xFF;
201 memcpy(&addr_buf
[2], buf
, len
);
204 msg
.addr
= client
->addr
;
208 ret
= i2c_transfer(client
->adapter
, &msg
, 1);
210 return ret
< 0 ? ret
: (ret
!= 1 ? -EIO
: 0);
213 static int goodix_i2c_write_u8(struct i2c_client
*client
, u16 reg
, u8 value
)
215 return goodix_i2c_write(client
, reg
, &value
, sizeof(value
));
218 static const struct goodix_chip_data
*goodix_get_chip_data(u16 id
)
222 return >1x_chip_data
;
229 return >911_chip_data
;
233 return >967_chip_data
;
236 return >9x_chip_data
;
240 static int goodix_ts_read_input_report(struct goodix_ts_data
*ts
, u8
*data
)
242 unsigned long max_timeout
;
247 * The 'buffer status' bit, which indicates that the data is valid, is
248 * not set as soon as the interrupt is raised, but slightly after.
249 * This takes around 10 ms to happen, so we poll for 20 ms.
251 max_timeout
= jiffies
+ msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT
);
253 error
= goodix_i2c_read(ts
->client
, GOODIX_READ_COOR_ADDR
,
254 data
, GOODIX_CONTACT_SIZE
+ 1);
256 dev_err(&ts
->client
->dev
, "I2C transfer error: %d\n",
261 if (data
[0] & GOODIX_BUFFER_STATUS_READY
) {
262 touch_num
= data
[0] & 0x0f;
263 if (touch_num
> ts
->max_touch_num
)
267 data
+= 1 + GOODIX_CONTACT_SIZE
;
268 error
= goodix_i2c_read(ts
->client
,
269 GOODIX_READ_COOR_ADDR
+
270 1 + GOODIX_CONTACT_SIZE
,
272 GOODIX_CONTACT_SIZE
*
281 usleep_range(1000, 2000); /* Poll every 1 - 2 ms */
282 } while (time_before(jiffies
, max_timeout
));
285 * The Goodix panel will send spurious interrupts after a
286 * 'finger up' event, which will always cause a timeout.
291 static void goodix_ts_report_touch(struct goodix_ts_data
*ts
, u8
*coor_data
)
293 int id
= coor_data
[0] & 0x0F;
294 int input_x
= get_unaligned_le16(&coor_data
[1]);
295 int input_y
= get_unaligned_le16(&coor_data
[3]);
296 int input_w
= get_unaligned_le16(&coor_data
[5]);
298 /* Inversions have to happen before axis swapping */
300 input_x
= ts
->abs_x_max
- input_x
;
302 input_y
= ts
->abs_y_max
- input_y
;
304 swap(input_x
, input_y
);
306 input_mt_slot(ts
->input_dev
, id
);
307 input_mt_report_slot_state(ts
->input_dev
, MT_TOOL_FINGER
, true);
308 input_report_abs(ts
->input_dev
, ABS_MT_POSITION_X
, input_x
);
309 input_report_abs(ts
->input_dev
, ABS_MT_POSITION_Y
, input_y
);
310 input_report_abs(ts
->input_dev
, ABS_MT_TOUCH_MAJOR
, input_w
);
311 input_report_abs(ts
->input_dev
, ABS_MT_WIDTH_MAJOR
, input_w
);
315 * goodix_process_events - Process incoming events
317 * @ts: our goodix_ts_data pointer
319 * Called when the IRQ is triggered. Read the current device state, and push
320 * the input events to the user space.
322 static void goodix_process_events(struct goodix_ts_data
*ts
)
324 u8 point_data
[1 + GOODIX_CONTACT_SIZE
* GOODIX_MAX_CONTACTS
];
328 touch_num
= goodix_ts_read_input_report(ts
, point_data
);
333 * Bit 4 of the first byte reports the status of the capacitive
334 * Windows/Home button.
336 input_report_key(ts
->input_dev
, KEY_LEFTMETA
, point_data
[0] & BIT(4));
338 for (i
= 0; i
< touch_num
; i
++)
339 goodix_ts_report_touch(ts
,
340 &point_data
[1 + GOODIX_CONTACT_SIZE
* i
]);
342 input_mt_sync_frame(ts
->input_dev
);
343 input_sync(ts
->input_dev
);
347 * goodix_ts_irq_handler - The IRQ handler
349 * @irq: interrupt number.
350 * @dev_id: private data pointer.
352 static irqreturn_t
goodix_ts_irq_handler(int irq
, void *dev_id
)
354 struct goodix_ts_data
*ts
= dev_id
;
356 goodix_process_events(ts
);
358 if (goodix_i2c_write_u8(ts
->client
, GOODIX_READ_COOR_ADDR
, 0) < 0)
359 dev_err(&ts
->client
->dev
, "I2C write end_cmd error\n");
364 static void goodix_free_irq(struct goodix_ts_data
*ts
)
366 devm_free_irq(&ts
->client
->dev
, ts
->client
->irq
, ts
);
369 static int goodix_request_irq(struct goodix_ts_data
*ts
)
371 return devm_request_threaded_irq(&ts
->client
->dev
, ts
->client
->irq
,
372 NULL
, goodix_ts_irq_handler
,
373 ts
->irq_flags
, ts
->client
->name
, ts
);
376 static int goodix_check_cfg_8(struct goodix_ts_data
*ts
,
377 const struct firmware
*cfg
)
379 int i
, raw_cfg_len
= cfg
->size
- 2;
382 for (i
= 0; i
< raw_cfg_len
; i
++)
383 check_sum
+= cfg
->data
[i
];
384 check_sum
= (~check_sum
) + 1;
385 if (check_sum
!= cfg
->data
[raw_cfg_len
]) {
386 dev_err(&ts
->client
->dev
,
387 "The checksum of the config fw is not correct");
391 if (cfg
->data
[raw_cfg_len
+ 1] != 1) {
392 dev_err(&ts
->client
->dev
,
393 "Config fw must have Config_Fresh register set");
400 static int goodix_check_cfg_16(struct goodix_ts_data
*ts
,
401 const struct firmware
*cfg
)
403 int i
, raw_cfg_len
= cfg
->size
- 3;
406 for (i
= 0; i
< raw_cfg_len
; i
+= 2)
407 check_sum
+= get_unaligned_be16(&cfg
->data
[i
]);
408 check_sum
= (~check_sum
) + 1;
409 if (check_sum
!= get_unaligned_be16(&cfg
->data
[raw_cfg_len
])) {
410 dev_err(&ts
->client
->dev
,
411 "The checksum of the config fw is not correct");
415 if (cfg
->data
[raw_cfg_len
+ 2] != 1) {
416 dev_err(&ts
->client
->dev
,
417 "Config fw must have Config_Fresh register set");
425 * goodix_check_cfg - Checks if config fw is valid
427 * @ts: goodix_ts_data pointer
428 * @cfg: firmware config data
430 static int goodix_check_cfg(struct goodix_ts_data
*ts
,
431 const struct firmware
*cfg
)
433 if (cfg
->size
> GOODIX_CONFIG_MAX_LENGTH
) {
434 dev_err(&ts
->client
->dev
,
435 "The length of the config fw is not correct");
439 return ts
->chip
->check_config(ts
, cfg
);
443 * goodix_send_cfg - Write fw config to device
445 * @ts: goodix_ts_data pointer
446 * @cfg: config firmware to write to device
448 static int goodix_send_cfg(struct goodix_ts_data
*ts
,
449 const struct firmware
*cfg
)
453 error
= goodix_check_cfg(ts
, cfg
);
457 error
= goodix_i2c_write(ts
->client
, ts
->chip
->config_addr
, cfg
->data
,
460 dev_err(&ts
->client
->dev
, "Failed to write config data: %d",
464 dev_dbg(&ts
->client
->dev
, "Config sent successfully.");
466 /* Let the firmware reconfigure itself, so sleep for 10ms */
467 usleep_range(10000, 11000);
472 static int goodix_int_sync(struct goodix_ts_data
*ts
)
476 error
= gpiod_direction_output(ts
->gpiod_int
, 0);
480 msleep(50); /* T5: 50ms */
482 error
= gpiod_direction_input(ts
->gpiod_int
);
490 * goodix_reset - Reset device during power on
492 * @ts: goodix_ts_data pointer
494 static int goodix_reset(struct goodix_ts_data
*ts
)
498 /* begin select I2C slave addr */
499 error
= gpiod_direction_output(ts
->gpiod_rst
, 0);
503 msleep(20); /* T2: > 10ms */
505 /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */
506 error
= gpiod_direction_output(ts
->gpiod_int
, ts
->client
->addr
== 0x14);
510 usleep_range(100, 2000); /* T3: > 100us */
512 error
= gpiod_direction_output(ts
->gpiod_rst
, 1);
516 usleep_range(6000, 10000); /* T4: > 5ms */
518 /* end select I2C slave addr */
519 error
= gpiod_direction_input(ts
->gpiod_rst
);
523 error
= goodix_int_sync(ts
);
531 * goodix_get_gpio_config - Get GPIO config from ACPI/DT
533 * @ts: goodix_ts_data pointer
535 static int goodix_get_gpio_config(struct goodix_ts_data
*ts
)
539 struct gpio_desc
*gpiod
;
543 dev
= &ts
->client
->dev
;
545 /* Get the interrupt GPIO pin number */
546 gpiod
= devm_gpiod_get_optional(dev
, GOODIX_GPIO_INT_NAME
, GPIOD_IN
);
548 error
= PTR_ERR(gpiod
);
549 if (error
!= -EPROBE_DEFER
)
550 dev_dbg(dev
, "Failed to get %s GPIO: %d\n",
551 GOODIX_GPIO_INT_NAME
, error
);
555 ts
->gpiod_int
= gpiod
;
557 /* Get the reset line GPIO pin number */
558 gpiod
= devm_gpiod_get_optional(dev
, GOODIX_GPIO_RST_NAME
, GPIOD_IN
);
560 error
= PTR_ERR(gpiod
);
561 if (error
!= -EPROBE_DEFER
)
562 dev_dbg(dev
, "Failed to get %s GPIO: %d\n",
563 GOODIX_GPIO_RST_NAME
, error
);
567 ts
->gpiod_rst
= gpiod
;
573 * goodix_read_config - Read the embedded configuration of the panel
575 * @ts: our goodix_ts_data pointer
577 * Must be called during probe
579 static void goodix_read_config(struct goodix_ts_data
*ts
)
581 u8 config
[GOODIX_CONFIG_MAX_LENGTH
];
584 error
= goodix_i2c_read(ts
->client
, ts
->chip
->config_addr
,
585 config
, ts
->chip
->config_len
);
587 dev_warn(&ts
->client
->dev
,
588 "Error reading config (%d), using defaults\n",
590 ts
->abs_x_max
= GOODIX_MAX_WIDTH
;
591 ts
->abs_y_max
= GOODIX_MAX_HEIGHT
;
593 swap(ts
->abs_x_max
, ts
->abs_y_max
);
594 ts
->int_trigger_type
= GOODIX_INT_TRIGGER
;
595 ts
->max_touch_num
= GOODIX_MAX_CONTACTS
;
599 ts
->abs_x_max
= get_unaligned_le16(&config
[RESOLUTION_LOC
]);
600 ts
->abs_y_max
= get_unaligned_le16(&config
[RESOLUTION_LOC
+ 2]);
602 swap(ts
->abs_x_max
, ts
->abs_y_max
);
603 ts
->int_trigger_type
= config
[TRIGGER_LOC
] & 0x03;
604 ts
->max_touch_num
= config
[MAX_CONTACTS_LOC
] & 0x0f;
605 if (!ts
->abs_x_max
|| !ts
->abs_y_max
|| !ts
->max_touch_num
) {
606 dev_err(&ts
->client
->dev
,
607 "Invalid config, using defaults\n");
608 ts
->abs_x_max
= GOODIX_MAX_WIDTH
;
609 ts
->abs_y_max
= GOODIX_MAX_HEIGHT
;
611 swap(ts
->abs_x_max
, ts
->abs_y_max
);
612 ts
->max_touch_num
= GOODIX_MAX_CONTACTS
;
615 if (dmi_check_system(rotated_screen
)) {
616 ts
->inverted_x
= true;
617 ts
->inverted_y
= true;
618 dev_dbg(&ts
->client
->dev
,
619 "Applying '180 degrees rotated screen' quirk\n");
624 * goodix_read_version - Read goodix touchscreen version
626 * @ts: our goodix_ts_data pointer
628 static int goodix_read_version(struct goodix_ts_data
*ts
)
634 error
= goodix_i2c_read(ts
->client
, GOODIX_REG_ID
, buf
, sizeof(buf
));
636 dev_err(&ts
->client
->dev
, "read version failed: %d\n", error
);
640 memcpy(id_str
, buf
, 4);
642 if (kstrtou16(id_str
, 10, &ts
->id
))
645 ts
->version
= get_unaligned_le16(&buf
[4]);
647 dev_info(&ts
->client
->dev
, "ID %d, version: %04x\n", ts
->id
,
654 * goodix_i2c_test - I2C test function to check if the device answers.
656 * @client: the i2c client
658 static int goodix_i2c_test(struct i2c_client
*client
)
664 while (retry
++ < 2) {
665 error
= goodix_i2c_read(client
, GOODIX_REG_ID
,
670 dev_err(&client
->dev
, "i2c test failed attempt %d: %d\n",
679 * goodix_request_input_dev - Allocate, populate and register the input device
681 * @ts: our goodix_ts_data pointer
683 * Must be called during probe
685 static int goodix_request_input_dev(struct goodix_ts_data
*ts
)
689 ts
->input_dev
= devm_input_allocate_device(&ts
->client
->dev
);
690 if (!ts
->input_dev
) {
691 dev_err(&ts
->client
->dev
, "Failed to allocate input device.");
695 input_set_abs_params(ts
->input_dev
, ABS_MT_POSITION_X
,
696 0, ts
->abs_x_max
, 0, 0);
697 input_set_abs_params(ts
->input_dev
, ABS_MT_POSITION_Y
,
698 0, ts
->abs_y_max
, 0, 0);
699 input_set_abs_params(ts
->input_dev
, ABS_MT_WIDTH_MAJOR
, 0, 255, 0, 0);
700 input_set_abs_params(ts
->input_dev
, ABS_MT_TOUCH_MAJOR
, 0, 255, 0, 0);
702 input_mt_init_slots(ts
->input_dev
, ts
->max_touch_num
,
703 INPUT_MT_DIRECT
| INPUT_MT_DROP_UNUSED
);
705 ts
->input_dev
->name
= "Goodix Capacitive TouchScreen";
706 ts
->input_dev
->phys
= "input/ts";
707 ts
->input_dev
->id
.bustype
= BUS_I2C
;
708 ts
->input_dev
->id
.vendor
= 0x0416;
709 ts
->input_dev
->id
.product
= ts
->id
;
710 ts
->input_dev
->id
.version
= ts
->version
;
712 /* Capacitive Windows/Home button on some devices */
713 input_set_capability(ts
->input_dev
, EV_KEY
, KEY_LEFTMETA
);
715 error
= input_register_device(ts
->input_dev
);
717 dev_err(&ts
->client
->dev
,
718 "Failed to register input device: %d", error
);
726 * goodix_configure_dev - Finish device initialization
728 * @ts: our goodix_ts_data pointer
730 * Must be called from probe to finish initialization of the device.
731 * Contains the common initialization code for both devices that
732 * declare gpio pins and devices that do not. It is either called
733 * directly from probe or from request_firmware_wait callback.
735 static int goodix_configure_dev(struct goodix_ts_data
*ts
)
739 ts
->swapped_x_y
= device_property_read_bool(&ts
->client
->dev
,
740 "touchscreen-swapped-x-y");
741 ts
->inverted_x
= device_property_read_bool(&ts
->client
->dev
,
742 "touchscreen-inverted-x");
743 ts
->inverted_y
= device_property_read_bool(&ts
->client
->dev
,
744 "touchscreen-inverted-y");
746 goodix_read_config(ts
);
748 error
= goodix_request_input_dev(ts
);
752 ts
->irq_flags
= goodix_irq_flags
[ts
->int_trigger_type
] | IRQF_ONESHOT
;
753 error
= goodix_request_irq(ts
);
755 dev_err(&ts
->client
->dev
, "request IRQ failed: %d\n", error
);
763 * goodix_config_cb - Callback to finish device init
765 * @ts: our goodix_ts_data pointer
767 * request_firmware_wait callback that finishes
768 * initialization of the device.
770 static void goodix_config_cb(const struct firmware
*cfg
, void *ctx
)
772 struct goodix_ts_data
*ts
= ctx
;
776 /* send device configuration to the firmware */
777 error
= goodix_send_cfg(ts
, cfg
);
779 goto err_release_cfg
;
782 goodix_configure_dev(ts
);
785 release_firmware(cfg
);
786 complete_all(&ts
->firmware_loading_complete
);
789 static int goodix_ts_probe(struct i2c_client
*client
,
790 const struct i2c_device_id
*id
)
792 struct goodix_ts_data
*ts
;
795 dev_dbg(&client
->dev
, "I2C Address: 0x%02x\n", client
->addr
);
797 if (!i2c_check_functionality(client
->adapter
, I2C_FUNC_I2C
)) {
798 dev_err(&client
->dev
, "I2C check functionality failed.\n");
802 ts
= devm_kzalloc(&client
->dev
, sizeof(*ts
), GFP_KERNEL
);
807 i2c_set_clientdata(client
, ts
);
808 init_completion(&ts
->firmware_loading_complete
);
810 error
= goodix_get_gpio_config(ts
);
814 if (ts
->gpiod_int
&& ts
->gpiod_rst
) {
815 /* reset the controller */
816 error
= goodix_reset(ts
);
818 dev_err(&client
->dev
, "Controller reset failed.\n");
823 error
= goodix_i2c_test(client
);
825 dev_err(&client
->dev
, "I2C communication failure: %d\n", error
);
829 error
= goodix_read_version(ts
);
831 dev_err(&client
->dev
, "Read version failed.\n");
835 ts
->chip
= goodix_get_chip_data(ts
->id
);
837 if (ts
->gpiod_int
&& ts
->gpiod_rst
) {
838 /* update device config */
839 ts
->cfg_name
= devm_kasprintf(&client
->dev
, GFP_KERNEL
,
840 "goodix_%d_cfg.bin", ts
->id
);
844 error
= request_firmware_nowait(THIS_MODULE
, true, ts
->cfg_name
,
845 &client
->dev
, GFP_KERNEL
, ts
,
848 dev_err(&client
->dev
,
849 "Failed to invoke firmware loader: %d\n",
856 error
= goodix_configure_dev(ts
);
864 static int goodix_ts_remove(struct i2c_client
*client
)
866 struct goodix_ts_data
*ts
= i2c_get_clientdata(client
);
868 if (ts
->gpiod_int
&& ts
->gpiod_rst
)
869 wait_for_completion(&ts
->firmware_loading_complete
);
874 static int __maybe_unused
goodix_suspend(struct device
*dev
)
876 struct i2c_client
*client
= to_i2c_client(dev
);
877 struct goodix_ts_data
*ts
= i2c_get_clientdata(client
);
880 /* We need gpio pins to suspend/resume */
881 if (!ts
->gpiod_int
|| !ts
->gpiod_rst
)
884 wait_for_completion(&ts
->firmware_loading_complete
);
886 /* Free IRQ as IRQ pin is used as output in the suspend sequence */
889 /* Output LOW on the INT pin for 5 ms */
890 error
= gpiod_direction_output(ts
->gpiod_int
, 0);
892 goodix_request_irq(ts
);
896 usleep_range(5000, 6000);
898 error
= goodix_i2c_write_u8(ts
->client
, GOODIX_REG_COMMAND
,
899 GOODIX_CMD_SCREEN_OFF
);
901 dev_err(&ts
->client
->dev
, "Screen off command failed\n");
902 gpiod_direction_input(ts
->gpiod_int
);
903 goodix_request_irq(ts
);
908 * The datasheet specifies that the interval between sending screen-off
909 * command and wake-up should be longer than 58 ms. To avoid waking up
910 * sooner, delay 58ms here.
916 static int __maybe_unused
goodix_resume(struct device
*dev
)
918 struct i2c_client
*client
= to_i2c_client(dev
);
919 struct goodix_ts_data
*ts
= i2c_get_clientdata(client
);
922 if (!ts
->gpiod_int
|| !ts
->gpiod_rst
)
926 * Exit sleep mode by outputting HIGH level to INT pin
929 error
= gpiod_direction_output(ts
->gpiod_int
, 1);
933 usleep_range(2000, 5000);
935 error
= goodix_int_sync(ts
);
939 error
= goodix_request_irq(ts
);
946 static SIMPLE_DEV_PM_OPS(goodix_pm_ops
, goodix_suspend
, goodix_resume
);
948 static const struct i2c_device_id goodix_ts_id
[] = {
949 { "GDIX1001:00", 0 },
952 MODULE_DEVICE_TABLE(i2c
, goodix_ts_id
);
955 static const struct acpi_device_id goodix_acpi_match
[] = {
959 MODULE_DEVICE_TABLE(acpi
, goodix_acpi_match
);
963 static const struct of_device_id goodix_of_match
[] = {
964 { .compatible
= "goodix,gt1151" },
965 { .compatible
= "goodix,gt911" },
966 { .compatible
= "goodix,gt9110" },
967 { .compatible
= "goodix,gt912" },
968 { .compatible
= "goodix,gt927" },
969 { .compatible
= "goodix,gt9271" },
970 { .compatible
= "goodix,gt928" },
971 { .compatible
= "goodix,gt967" },
974 MODULE_DEVICE_TABLE(of
, goodix_of_match
);
977 static struct i2c_driver goodix_ts_driver
= {
978 .probe
= goodix_ts_probe
,
979 .remove
= goodix_ts_remove
,
980 .id_table
= goodix_ts_id
,
983 .acpi_match_table
= ACPI_PTR(goodix_acpi_match
),
984 .of_match_table
= of_match_ptr(goodix_of_match
),
985 .pm
= &goodix_pm_ops
,
988 module_i2c_driver(goodix_ts_driver
);
990 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
991 MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>");
992 MODULE_DESCRIPTION("Goodix touchscreen driver");
993 MODULE_LICENSE("GPL v2");