1 // SPDX-License-Identifier: GPL-2.0-only
3 * Raydium touchscreen I2C driver.
5 * Copyright (C) 2012-2014, Raydium Semiconductor Corporation.
7 * Raydium reserves the right to make changes without further notice
8 * to the materials described herein. Raydium does not assume any
9 * liability arising out of the application described herein.
11 * Contact Raydium Semiconductor Corporation at www.rad-ic.com
14 #include <linux/acpi.h>
15 #include <linux/delay.h>
16 #include <linux/firmware.h>
17 #include <linux/gpio/consumer.h>
18 #include <linux/i2c.h>
19 #include <linux/input.h>
20 #include <linux/input/mt.h>
21 #include <linux/interrupt.h>
22 #include <linux/module.h>
24 #include <linux/regulator/consumer.h>
25 #include <linux/slab.h>
26 #include <asm/unaligned.h>
29 #define RM_BOOT_BLDR 0x02
30 #define RM_BOOT_MAIN 0x03
32 /* I2C bootoloader commands */
33 #define RM_CMD_BOOT_PAGE_WRT 0x0B /* send bl page write */
34 #define RM_CMD_BOOT_WRT 0x11 /* send bl write */
35 #define RM_CMD_BOOT_ACK 0x22 /* send ack*/
36 #define RM_CMD_BOOT_CHK 0x33 /* send data check */
37 #define RM_CMD_BOOT_READ 0x44 /* send wait bl data ready*/
39 #define RM_BOOT_RDY 0xFF /* bl data ready */
41 /* I2C main commands */
42 #define RM_CMD_QUERY_BANK 0x2B
43 #define RM_CMD_DATA_BANK 0x4D
44 #define RM_CMD_ENTER_SLEEP 0x4E
45 #define RM_CMD_BANK_SWITCH 0xAA
47 #define RM_RESET_MSG_ADDR 0x40000004
49 #define RM_MAX_READ_SIZE 56
50 #define RM_PACKET_CRC_SIZE 2
52 /* Touch relative info */
53 #define RM_MAX_RETRIES 3
54 #define RM_RETRY_DELAY_MS 20
55 #define RM_MAX_TOUCH_NUM 10
56 #define RM_BOOT_DELAY_MS 100
58 /* Offsets in contact data */
59 #define RM_CONTACT_STATE_POS 0
60 #define RM_CONTACT_X_POS 1
61 #define RM_CONTACT_Y_POS 3
62 #define RM_CONTACT_PRESSURE_POS 5
63 #define RM_CONTACT_WIDTH_X_POS 6
64 #define RM_CONTACT_WIDTH_Y_POS 7
66 /* Bootloader relative info */
67 #define RM_BL_WRT_CMD_SIZE 3 /* bl flash wrt cmd size */
68 #define RM_BL_WRT_PKG_SIZE 32 /* bl wrt pkg size */
69 #define RM_BL_WRT_LEN (RM_BL_WRT_PKG_SIZE + RM_BL_WRT_CMD_SIZE)
70 #define RM_FW_PAGE_SIZE 128
71 #define RM_MAX_FW_RETRIES 30
72 #define RM_MAX_FW_SIZE 0xD000
74 #define RM_POWERON_DELAY_USEC 500
75 #define RM_RESET_DELAY_MSEC 50
90 enum raydium_boot_mode {
95 /* Response to RM_CMD_DATA_BANK request */
96 struct raydium_data_info {
97 __le32 data_bank_addr;
102 struct raydium_info {
103 __le32 hw_ver; /*device version */
106 __le16 ft_ver; /* test version */
111 u8 x_res; /* units/mm */
112 u8 y_res; /* units/mm */
115 /* struct raydium_data - represents state of Raydium touchscreen device */
116 struct raydium_data {
117 struct i2c_client *client;
118 struct input_dev *input;
120 struct regulator *avdd;
121 struct regulator *vccio;
122 struct gpio_desc *reset_gpio;
124 struct raydium_info info;
126 struct mutex sysfs_mutex;
135 enum raydium_boot_mode boot_mode;
137 bool wake_irq_enabled;
141 * Header to be sent for RM_CMD_BANK_SWITCH command. This is used by
142 * raydium_i2c_{read|send} below.
144 struct __packed raydium_bank_switch_header {
149 static int raydium_i2c_xfer(struct i2c_client *client, u32 addr,
150 struct i2c_msg *xfer, size_t xfer_count)
154 * If address is greater than 255, then RM_CMD_BANK_SWITCH needs to be
155 * sent first. Else, skip the header i.e. xfer[0].
157 int xfer_start_idx = (addr > 0xff) ? 0 : 1;
158 xfer_count -= xfer_start_idx;
160 ret = i2c_transfer(client->adapter, &xfer[xfer_start_idx], xfer_count);
161 if (likely(ret == xfer_count))
164 return ret < 0 ? ret : -EIO;
167 static int raydium_i2c_send(struct i2c_client *client,
168 u32 addr, const void *data, size_t len)
173 u8 reg_addr = addr & 0xff;
175 tx_buf = kmalloc(len + 1, GFP_KERNEL);
179 tx_buf[0] = reg_addr;
180 memcpy(tx_buf + 1, data, len);
183 struct raydium_bank_switch_header header = {
184 .cmd = RM_CMD_BANK_SWITCH,
185 .be_addr = cpu_to_be32(addr),
189 * Perform as a single i2c_transfer transaction to ensure that
190 * no other I2C transactions are initiated on the bus to any
191 * other device in between. Initiating transacations to other
192 * devices after RM_CMD_BANK_SWITCH is sent is known to cause
193 * issues. This is also why regmap infrastructure cannot be used
194 * for this driver. Regmap handles page(bank) switch and reads
195 * as separate i2c_transfer() operations. This can result in
196 * problems if the Raydium device is on a shared I2C bus.
198 struct i2c_msg xfer[] = {
200 .addr = client->addr,
201 .len = sizeof(header),
202 .buf = (u8 *)&header,
205 .addr = client->addr,
211 error = raydium_i2c_xfer(client, addr, xfer, ARRAY_SIZE(xfer));
215 msleep(RM_RETRY_DELAY_MS);
216 } while (++tries < RM_MAX_RETRIES);
218 dev_err(&client->dev, "%s failed: %d\n", __func__, error);
222 static int raydium_i2c_read(struct i2c_client *client,
223 u32 addr, void *data, size_t len)
228 u8 reg_addr = addr & 0xff;
229 struct raydium_bank_switch_header header = {
230 .cmd = RM_CMD_BANK_SWITCH,
231 .be_addr = cpu_to_be32(addr),
233 size_t xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE);
236 * Perform as a single i2c_transfer transaction to ensure that
237 * no other I2C transactions are initiated on the bus to any
238 * other device in between. Initiating transacations to other
239 * devices after RM_CMD_BANK_SWITCH is sent is known to cause
240 * issues. This is also why regmap infrastructure cannot be used
241 * for this driver. Regmap handles page(bank) switch and writes
242 * as separate i2c_transfer() operations. This can result in
243 * problems if the Raydium device is on a shared I2C bus.
245 struct i2c_msg xfer[] = {
247 .addr = client->addr,
248 .len = sizeof(header),
249 .buf = (u8 *)&header,
252 .addr = client->addr,
257 .addr = client->addr,
264 error = raydium_i2c_xfer(client, addr, xfer, ARRAY_SIZE(xfer));
276 static int raydium_i2c_sw_reset(struct i2c_client *client)
278 const u8 soft_rst_cmd = 0x01;
281 error = raydium_i2c_send(client, RM_RESET_MSG_ADDR, &soft_rst_cmd,
282 sizeof(soft_rst_cmd));
284 dev_err(&client->dev, "software reset failed: %d\n", error);
288 msleep(RM_RESET_DELAY_MSEC);
293 static int raydium_i2c_query_ts_info(struct raydium_data *ts)
295 struct i2c_client *client = ts->client;
296 struct raydium_data_info data_info;
297 __le32 query_bank_addr;
299 int error, retry_cnt;
301 for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
302 error = raydium_i2c_read(client, RM_CMD_DATA_BANK,
303 &data_info, sizeof(data_info));
308 * Warn user if we already allocated memory for reports and
309 * then the size changed (due to firmware update?) and keep
312 if (ts->report_data && ts->pkg_size != data_info.pkg_size) {
313 dev_warn(&client->dev,
314 "report size changes, was: %d, new: %d\n",
315 ts->pkg_size, data_info.pkg_size);
317 ts->pkg_size = data_info.pkg_size;
318 ts->report_size = ts->pkg_size - RM_PACKET_CRC_SIZE;
321 ts->contact_size = data_info.tp_info_size;
322 ts->data_bank_addr = le32_to_cpu(data_info.data_bank_addr);
324 dev_dbg(&client->dev,
325 "data_bank_addr: %#08x, report_size: %d, contact_size: %d\n",
326 ts->data_bank_addr, ts->report_size, ts->contact_size);
328 error = raydium_i2c_read(client, RM_CMD_QUERY_BANK,
330 sizeof(query_bank_addr));
334 error = raydium_i2c_read(client, le32_to_cpu(query_bank_addr),
335 &ts->info, sizeof(ts->info));
342 dev_err(&client->dev, "failed to query device parameters: %d\n", error);
346 static int raydium_i2c_check_fw_status(struct raydium_data *ts)
348 struct i2c_client *client = ts->client;
349 static const u8 bl_ack = 0x62;
350 static const u8 main_ack = 0x66;
354 error = raydium_i2c_read(client, RM_CMD_BOOT_READ, buf, sizeof(buf));
356 if (buf[0] == bl_ack)
357 ts->boot_mode = RAYDIUM_TS_BLDR;
358 else if (buf[0] == main_ack)
359 ts->boot_mode = RAYDIUM_TS_MAIN;
366 static int raydium_i2c_initialize(struct raydium_data *ts)
368 struct i2c_client *client = ts->client;
369 int error, retry_cnt;
371 for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
372 /* Wait for Hello packet */
373 msleep(RM_BOOT_DELAY_MS);
375 error = raydium_i2c_check_fw_status(ts);
377 dev_err(&client->dev,
378 "failed to read 'hello' packet: %d\n", error);
382 if (ts->boot_mode == RAYDIUM_TS_BLDR ||
383 ts->boot_mode == RAYDIUM_TS_MAIN) {
389 ts->boot_mode = RAYDIUM_TS_BLDR;
391 if (ts->boot_mode == RAYDIUM_TS_BLDR) {
392 ts->info.hw_ver = cpu_to_le32(0xffffffffUL);
393 ts->info.main_ver = 0xff;
394 ts->info.sub_ver = 0xff;
396 raydium_i2c_query_ts_info(ts);
402 static int raydium_i2c_bl_chk_state(struct i2c_client *client,
403 enum raydium_bl_ack state)
405 static const u8 ack_ok[] = { 0xFF, 0x39, 0x30, 0x30, 0x54 };
406 u8 rbuf[sizeof(ack_ok)];
410 for (retry = 0; retry < RM_MAX_FW_RETRIES; retry++) {
412 case RAYDIUM_ACK_NULL:
415 case RAYDIUM_WAIT_READY:
416 error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
418 if (!error && rbuf[0] == RM_BOOT_RDY)
423 case RAYDIUM_PATH_READY:
424 error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
426 if (!error && !memcmp(rbuf, ack_ok, sizeof(ack_ok)))
432 dev_err(&client->dev, "%s: invalid target state %d\n",
443 static int raydium_i2c_write_object(struct i2c_client *client,
444 const void *data, size_t len,
445 enum raydium_bl_ack state)
448 static const u8 cmd[] = { 0xFF, 0x39 };
450 error = raydium_i2c_send(client, RM_CMD_BOOT_WRT, data, len);
452 dev_err(&client->dev, "WRT obj command failed: %d\n",
457 error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, cmd, sizeof(cmd));
459 dev_err(&client->dev, "Ack obj command failed: %d\n", error);
463 error = raydium_i2c_bl_chk_state(client, state);
465 dev_err(&client->dev, "BL check state failed: %d\n", error);
471 static int raydium_i2c_boot_trigger(struct i2c_client *client)
473 static const u8 cmd[7][6] = {
474 { 0x08, 0x0C, 0x09, 0x00, 0x50, 0xD7 },
475 { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
476 { 0x08, 0x04, 0x09, 0x00, 0x50, 0x00 },
477 { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
478 { 0x08, 0x0C, 0x09, 0x00, 0x50, 0x00 },
479 { 0x06, 0x01, 0x00, 0x00, 0x00, 0x00 },
480 { 0x02, 0xA2, 0x00, 0x00, 0x00, 0x00 },
485 for (i = 0; i < 7; i++) {
486 error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
489 dev_err(&client->dev,
490 "boot trigger failed at step %d: %d\n",
499 static int raydium_i2c_fw_trigger(struct i2c_client *client)
501 static const u8 cmd[5][11] = {
502 { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0xD7, 0, 0, 0 },
503 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
504 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
505 { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
506 { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
511 for (i = 0; i < 5; i++) {
512 error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
515 dev_err(&client->dev,
516 "fw trigger failed at step %d: %d\n",
525 static int raydium_i2c_check_path(struct i2c_client *client)
527 static const u8 cmd[] = { 0x09, 0x00, 0x09, 0x00, 0x50, 0x10, 0x00 };
530 error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
533 dev_err(&client->dev, "check path command failed: %d\n", error);
540 static int raydium_i2c_enter_bl(struct i2c_client *client)
542 static const u8 cal_cmd[] = { 0x00, 0x01, 0x52 };
545 error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
548 dev_err(&client->dev, "enter bl command failed: %d\n", error);
552 msleep(RM_BOOT_DELAY_MS);
556 static int raydium_i2c_leave_bl(struct i2c_client *client)
558 static const u8 leave_cmd[] = { 0x05, 0x00 };
561 error = raydium_i2c_write_object(client, leave_cmd, sizeof(leave_cmd),
564 dev_err(&client->dev, "leave bl command failed: %d\n", error);
568 msleep(RM_BOOT_DELAY_MS);
572 static int raydium_i2c_write_checksum(struct i2c_client *client,
573 size_t length, u16 checksum)
575 u8 checksum_cmd[] = { 0x00, 0x05, 0x6D, 0x00, 0x00, 0x00, 0x00 };
578 put_unaligned_le16(length, &checksum_cmd[3]);
579 put_unaligned_le16(checksum, &checksum_cmd[5]);
581 error = raydium_i2c_write_object(client,
582 checksum_cmd, sizeof(checksum_cmd),
585 dev_err(&client->dev, "failed to write checksum: %d\n",
593 static int raydium_i2c_disable_watch_dog(struct i2c_client *client)
595 static const u8 cmd[] = { 0x0A, 0xAA };
598 error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
601 dev_err(&client->dev, "disable watchdog command failed: %d\n",
609 static int raydium_i2c_fw_write_page(struct i2c_client *client,
610 u16 page_idx, const void *data, size_t len)
612 u8 buf[RM_BL_WRT_LEN];
617 BUILD_BUG_ON((RM_FW_PAGE_SIZE % RM_BL_WRT_PKG_SIZE) != 0);
619 for (i = 0; i < RM_FW_PAGE_SIZE / RM_BL_WRT_PKG_SIZE; i++) {
620 buf[BL_HEADER] = RM_CMD_BOOT_PAGE_WRT;
621 buf[BL_PAGE_STR] = page_idx ? 0xff : 0;
622 buf[BL_PKG_IDX] = i + 1;
624 xfer_len = min_t(size_t, len, RM_BL_WRT_PKG_SIZE);
625 memcpy(&buf[BL_DATA_STR], data, xfer_len);
626 if (len < RM_BL_WRT_PKG_SIZE)
627 memset(&buf[BL_DATA_STR + xfer_len], 0xff,
628 RM_BL_WRT_PKG_SIZE - xfer_len);
630 error = raydium_i2c_write_object(client, buf, RM_BL_WRT_LEN,
633 dev_err(&client->dev,
634 "page write command failed for page %d, chunk %d: %d\n",
646 static u16 raydium_calc_chksum(const u8 *buf, u16 len)
651 for (i = 0; i < len; i++)
657 static int raydium_i2c_do_update_firmware(struct raydium_data *ts,
658 const struct firmware *fw)
660 struct i2c_client *client = ts->client;
669 if (fw->size == 0 || fw->size > RM_MAX_FW_SIZE) {
670 dev_err(&client->dev, "Invalid firmware length\n");
674 error = raydium_i2c_check_fw_status(ts);
676 dev_err(&client->dev, "Unable to access IC %d\n", error);
680 if (ts->boot_mode == RAYDIUM_TS_MAIN) {
681 for (i = 0; i < RM_MAX_RETRIES; i++) {
682 error = raydium_i2c_enter_bl(client);
684 error = raydium_i2c_check_fw_status(ts);
686 dev_err(&client->dev,
687 "unable to access IC: %d\n",
692 if (ts->boot_mode == RAYDIUM_TS_BLDR)
697 if (ts->boot_mode == RAYDIUM_TS_MAIN) {
698 dev_err(&client->dev,
699 "failed to jump to boot loader: %d\n",
705 error = raydium_i2c_disable_watch_dog(client);
709 error = raydium_i2c_check_path(client);
713 error = raydium_i2c_boot_trigger(client);
715 dev_err(&client->dev, "send boot trigger fail: %d\n", error);
719 msleep(RM_BOOT_DELAY_MS);
726 len = min_t(size_t, data_len, RM_FW_PAGE_SIZE);
728 error = raydium_i2c_fw_write_page(client, page_nr++, data, len);
738 error = raydium_i2c_leave_bl(client);
740 dev_err(&client->dev,
741 "failed to leave boot loader: %d\n", error);
745 dev_dbg(&client->dev, "left boot loader mode\n");
746 msleep(RM_BOOT_DELAY_MS);
748 error = raydium_i2c_check_fw_status(ts);
750 dev_err(&client->dev,
751 "failed to check fw status after write: %d\n",
756 if (ts->boot_mode != RAYDIUM_TS_MAIN) {
757 dev_err(&client->dev,
758 "failed to switch to main fw after writing firmware: %d\n",
763 error = raydium_i2c_fw_trigger(client);
765 dev_err(&client->dev, "failed to trigger fw: %d\n", error);
769 fw_checksum = raydium_calc_chksum(fw->data, fw->size);
771 error = raydium_i2c_write_checksum(client, fw->size, fw_checksum);
778 static int raydium_i2c_fw_update(struct raydium_data *ts)
780 struct i2c_client *client = ts->client;
781 const struct firmware *fw = NULL;
785 fw_file = kasprintf(GFP_KERNEL, "/*(DEBLOBBED)*/",
786 le32_to_cpu(ts->info.hw_ver));
790 dev_dbg(&client->dev, "firmware name: %s\n", fw_file);
792 error = reject_firmware(&fw, fw_file, &client->dev);
794 dev_err(&client->dev, "Unable to open firmware %s\n", fw_file);
795 goto out_free_fw_file;
798 disable_irq(client->irq);
800 error = raydium_i2c_do_update_firmware(ts, fw);
802 dev_err(&client->dev, "firmware update failed: %d\n", error);
803 ts->boot_mode = RAYDIUM_TS_BLDR;
807 error = raydium_i2c_initialize(ts);
809 dev_err(&client->dev,
810 "failed to initialize device after firmware update: %d\n",
812 ts->boot_mode = RAYDIUM_TS_BLDR;
816 ts->boot_mode = RAYDIUM_TS_MAIN;
819 enable_irq(client->irq);
822 release_firmware(fw);
830 static void raydium_mt_event(struct raydium_data *ts)
834 for (i = 0; i < ts->report_size / ts->contact_size; i++) {
835 u8 *contact = &ts->report_data[ts->contact_size * i];
836 bool state = contact[RM_CONTACT_STATE_POS];
839 input_mt_slot(ts->input, i);
840 input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, state);
845 input_report_abs(ts->input, ABS_MT_POSITION_X,
846 get_unaligned_le16(&contact[RM_CONTACT_X_POS]));
847 input_report_abs(ts->input, ABS_MT_POSITION_Y,
848 get_unaligned_le16(&contact[RM_CONTACT_Y_POS]));
849 input_report_abs(ts->input, ABS_MT_PRESSURE,
850 contact[RM_CONTACT_PRESSURE_POS]);
852 wx = contact[RM_CONTACT_WIDTH_X_POS];
853 wy = contact[RM_CONTACT_WIDTH_Y_POS];
855 input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, max(wx, wy));
856 input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, min(wx, wy));
859 input_mt_sync_frame(ts->input);
860 input_sync(ts->input);
863 static irqreturn_t raydium_i2c_irq(int irq, void *_dev)
865 struct raydium_data *ts = _dev;
870 if (ts->boot_mode != RAYDIUM_TS_MAIN)
873 error = raydium_i2c_read(ts->client, ts->data_bank_addr,
874 ts->report_data, ts->pkg_size);
878 fw_crc = get_unaligned_le16(&ts->report_data[ts->report_size]);
879 calc_crc = raydium_calc_chksum(ts->report_data, ts->report_size);
880 if (unlikely(fw_crc != calc_crc)) {
881 dev_warn(&ts->client->dev,
882 "%s: invalid packet crc %#04x vs %#04x\n",
883 __func__, calc_crc, fw_crc);
887 raydium_mt_event(ts);
893 static ssize_t raydium_i2c_fw_ver_show(struct device *dev,
894 struct device_attribute *attr, char *buf)
896 struct i2c_client *client = to_i2c_client(dev);
897 struct raydium_data *ts = i2c_get_clientdata(client);
899 return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver);
902 static ssize_t raydium_i2c_hw_ver_show(struct device *dev,
903 struct device_attribute *attr, char *buf)
905 struct i2c_client *client = to_i2c_client(dev);
906 struct raydium_data *ts = i2c_get_clientdata(client);
908 return sprintf(buf, "%#04x\n", le32_to_cpu(ts->info.hw_ver));
911 static ssize_t raydium_i2c_boot_mode_show(struct device *dev,
912 struct device_attribute *attr,
915 struct i2c_client *client = to_i2c_client(dev);
916 struct raydium_data *ts = i2c_get_clientdata(client);
918 return sprintf(buf, "%s\n",
919 ts->boot_mode == RAYDIUM_TS_MAIN ?
920 "Normal" : "Recovery");
923 static ssize_t raydium_i2c_update_fw_store(struct device *dev,
924 struct device_attribute *attr,
925 const char *buf, size_t count)
927 struct i2c_client *client = to_i2c_client(dev);
928 struct raydium_data *ts = i2c_get_clientdata(client);
931 error = mutex_lock_interruptible(&ts->sysfs_mutex);
935 error = raydium_i2c_fw_update(ts);
937 mutex_unlock(&ts->sysfs_mutex);
939 return error ?: count;
942 static ssize_t raydium_i2c_calibrate_store(struct device *dev,
943 struct device_attribute *attr,
944 const char *buf, size_t count)
946 struct i2c_client *client = to_i2c_client(dev);
947 struct raydium_data *ts = i2c_get_clientdata(client);
948 static const u8 cal_cmd[] = { 0x00, 0x01, 0x9E };
951 error = mutex_lock_interruptible(&ts->sysfs_mutex);
955 error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
958 dev_err(&client->dev, "calibrate command failed: %d\n", error);
960 mutex_unlock(&ts->sysfs_mutex);
961 return error ?: count;
964 static DEVICE_ATTR(fw_version, S_IRUGO, raydium_i2c_fw_ver_show, NULL);
965 static DEVICE_ATTR(hw_version, S_IRUGO, raydium_i2c_hw_ver_show, NULL);
966 static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_i2c_boot_mode_show, NULL);
967 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, raydium_i2c_update_fw_store);
968 static DEVICE_ATTR(calibrate, S_IWUSR, NULL, raydium_i2c_calibrate_store);
970 static struct attribute *raydium_i2c_attributes[] = {
971 &dev_attr_update_fw.attr,
972 &dev_attr_boot_mode.attr,
973 &dev_attr_fw_version.attr,
974 &dev_attr_hw_version.attr,
975 &dev_attr_calibrate.attr,
979 static const struct attribute_group raydium_i2c_attribute_group = {
980 .attrs = raydium_i2c_attributes,
983 static int raydium_i2c_power_on(struct raydium_data *ts)
990 gpiod_set_value_cansleep(ts->reset_gpio, 1);
992 error = regulator_enable(ts->avdd);
994 dev_err(&ts->client->dev,
995 "failed to enable avdd regulator: %d\n", error);
996 goto release_reset_gpio;
999 error = regulator_enable(ts->vccio);
1001 regulator_disable(ts->avdd);
1002 dev_err(&ts->client->dev,
1003 "failed to enable vccio regulator: %d\n", error);
1004 goto release_reset_gpio;
1007 udelay(RM_POWERON_DELAY_USEC);
1010 gpiod_set_value_cansleep(ts->reset_gpio, 0);
1015 msleep(RM_RESET_DELAY_MSEC);
1020 static void raydium_i2c_power_off(void *_data)
1022 struct raydium_data *ts = _data;
1024 if (ts->reset_gpio) {
1025 gpiod_set_value_cansleep(ts->reset_gpio, 1);
1026 regulator_disable(ts->vccio);
1027 regulator_disable(ts->avdd);
1031 static int raydium_i2c_probe(struct i2c_client *client,
1032 const struct i2c_device_id *id)
1034 union i2c_smbus_data dummy;
1035 struct raydium_data *ts;
1038 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1039 dev_err(&client->dev,
1040 "i2c check functionality error (need I2C_FUNC_I2C)\n");
1044 ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
1048 mutex_init(&ts->sysfs_mutex);
1050 ts->client = client;
1051 i2c_set_clientdata(client, ts);
1053 ts->avdd = devm_regulator_get(&client->dev, "avdd");
1054 if (IS_ERR(ts->avdd)) {
1055 error = PTR_ERR(ts->avdd);
1056 if (error != -EPROBE_DEFER)
1057 dev_err(&client->dev,
1058 "Failed to get 'avdd' regulator: %d\n", error);
1062 ts->vccio = devm_regulator_get(&client->dev, "vccio");
1063 if (IS_ERR(ts->vccio)) {
1064 error = PTR_ERR(ts->vccio);
1065 if (error != -EPROBE_DEFER)
1066 dev_err(&client->dev,
1067 "Failed to get 'vccio' regulator: %d\n", error);
1071 ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
1073 if (IS_ERR(ts->reset_gpio)) {
1074 error = PTR_ERR(ts->reset_gpio);
1075 if (error != -EPROBE_DEFER)
1076 dev_err(&client->dev,
1077 "failed to get reset gpio: %d\n", error);
1081 error = raydium_i2c_power_on(ts);
1085 error = devm_add_action(&client->dev, raydium_i2c_power_off, ts);
1087 dev_err(&client->dev,
1088 "failed to install power off action: %d\n", error);
1089 raydium_i2c_power_off(ts);
1093 /* Make sure there is something at this address */
1094 if (i2c_smbus_xfer(client->adapter, client->addr, 0,
1095 I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) {
1096 dev_err(&client->dev, "nothing at this address\n");
1100 error = raydium_i2c_initialize(ts);
1102 dev_err(&client->dev, "failed to initialize: %d\n", error);
1106 ts->report_data = devm_kmalloc(&client->dev,
1107 ts->pkg_size, GFP_KERNEL);
1108 if (!ts->report_data)
1111 ts->input = devm_input_allocate_device(&client->dev);
1113 dev_err(&client->dev, "Failed to allocate input device\n");
1117 ts->input->name = "Raydium Touchscreen";
1118 ts->input->id.bustype = BUS_I2C;
1120 input_set_abs_params(ts->input, ABS_MT_POSITION_X,
1121 0, le16_to_cpu(ts->info.x_max), 0, 0);
1122 input_set_abs_params(ts->input, ABS_MT_POSITION_Y,
1123 0, le16_to_cpu(ts->info.y_max), 0, 0);
1124 input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res);
1125 input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res);
1127 input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
1128 input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
1130 error = input_mt_init_slots(ts->input, RM_MAX_TOUCH_NUM,
1131 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
1133 dev_err(&client->dev,
1134 "failed to initialize MT slots: %d\n", error);
1138 error = input_register_device(ts->input);
1140 dev_err(&client->dev,
1141 "unable to register input device: %d\n", error);
1145 error = devm_request_threaded_irq(&client->dev, client->irq,
1146 NULL, raydium_i2c_irq,
1147 IRQF_ONESHOT, client->name, ts);
1149 dev_err(&client->dev, "Failed to register interrupt\n");
1153 error = devm_device_add_group(&client->dev,
1154 &raydium_i2c_attribute_group);
1156 dev_err(&client->dev, "failed to create sysfs attributes: %d\n",
1164 static void __maybe_unused raydium_enter_sleep(struct i2c_client *client)
1166 static const u8 sleep_cmd[] = { 0x5A, 0xff, 0x00, 0x0f };
1169 error = raydium_i2c_send(client, RM_CMD_ENTER_SLEEP,
1170 sleep_cmd, sizeof(sleep_cmd));
1172 dev_err(&client->dev,
1173 "sleep command failed: %d\n", error);
1176 static int __maybe_unused raydium_i2c_suspend(struct device *dev)
1178 struct i2c_client *client = to_i2c_client(dev);
1179 struct raydium_data *ts = i2c_get_clientdata(client);
1181 /* Sleep is not available in BLDR recovery mode */
1182 if (ts->boot_mode != RAYDIUM_TS_MAIN)
1185 disable_irq(client->irq);
1187 if (device_may_wakeup(dev)) {
1188 raydium_enter_sleep(client);
1190 ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0);
1192 raydium_i2c_power_off(ts);
1198 static int __maybe_unused raydium_i2c_resume(struct device *dev)
1200 struct i2c_client *client = to_i2c_client(dev);
1201 struct raydium_data *ts = i2c_get_clientdata(client);
1203 if (device_may_wakeup(dev)) {
1204 if (ts->wake_irq_enabled)
1205 disable_irq_wake(client->irq);
1206 raydium_i2c_sw_reset(client);
1208 raydium_i2c_power_on(ts);
1209 raydium_i2c_initialize(ts);
1212 enable_irq(client->irq);
1217 static SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops,
1218 raydium_i2c_suspend, raydium_i2c_resume);
1220 static const struct i2c_device_id raydium_i2c_id[] = {
1221 { "raydium_i2c" , 0 },
1225 MODULE_DEVICE_TABLE(i2c, raydium_i2c_id);
1228 static const struct acpi_device_id raydium_acpi_id[] = {
1232 MODULE_DEVICE_TABLE(acpi, raydium_acpi_id);
1236 static const struct of_device_id raydium_of_match[] = {
1237 { .compatible = "raydium,rm32380", },
1240 MODULE_DEVICE_TABLE(of, raydium_of_match);
1243 static struct i2c_driver raydium_i2c_driver = {
1244 .probe = raydium_i2c_probe,
1245 .id_table = raydium_i2c_id,
1247 .name = "raydium_ts",
1248 .pm = &raydium_i2c_pm_ops,
1249 .acpi_match_table = ACPI_PTR(raydium_acpi_id),
1250 .of_match_table = of_match_ptr(raydium_of_match),
1253 module_i2c_driver(raydium_i2c_driver);
1255 MODULE_AUTHOR("Raydium");
1256 MODULE_DESCRIPTION("Raydium I2c Touchscreen driver");
1257 MODULE_LICENSE("GPL v2");