Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Raydium touchscreen I2C driver. |
| 3 | * |
| 4 | * Copyright (C) 2012-2014, Raydium Semiconductor Corporation. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * version 2, and only version 2, as published by the |
| 9 | * Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * Raydium reserves the right to make changes without further notice |
| 17 | * to the materials described herein. Raydium does not assume any |
| 18 | * liability arising out of the application described herein. |
| 19 | * |
| 20 | * Contact Raydium Semiconductor Corporation at www.rad-ic.com |
| 21 | */ |
| 22 | |
| 23 | #include <linux/acpi.h> |
| 24 | #include <linux/delay.h> |
| 25 | #include <linux/firmware.h> |
| 26 | #include <linux/gpio/consumer.h> |
| 27 | #include <linux/i2c.h> |
| 28 | #include <linux/input.h> |
| 29 | #include <linux/input/mt.h> |
| 30 | #include <linux/interrupt.h> |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/of.h> |
| 33 | #include <linux/regulator/consumer.h> |
| 34 | #include <linux/slab.h> |
| 35 | #include <asm/unaligned.h> |
| 36 | |
| 37 | /* Slave I2C mode */ |
| 38 | #define RM_BOOT_BLDR 0x02 |
| 39 | #define RM_BOOT_MAIN 0x03 |
| 40 | |
| 41 | /* I2C bootoloader commands */ |
| 42 | #define RM_CMD_BOOT_PAGE_WRT 0x0B /* send bl page write */ |
| 43 | #define RM_CMD_BOOT_WRT 0x11 /* send bl write */ |
| 44 | #define RM_CMD_BOOT_ACK 0x22 /* send ack*/ |
| 45 | #define RM_CMD_BOOT_CHK 0x33 /* send data check */ |
| 46 | #define RM_CMD_BOOT_READ 0x44 /* send wait bl data ready*/ |
| 47 | |
| 48 | #define RM_BOOT_RDY 0xFF /* bl data ready */ |
| 49 | |
| 50 | /* I2C main commands */ |
| 51 | #define RM_CMD_QUERY_BANK 0x2B |
| 52 | #define RM_CMD_DATA_BANK 0x4D |
| 53 | #define RM_CMD_ENTER_SLEEP 0x4E |
| 54 | #define RM_CMD_BANK_SWITCH 0xAA |
| 55 | |
| 56 | #define RM_RESET_MSG_ADDR 0x40000004 |
| 57 | |
| 58 | #define RM_MAX_READ_SIZE 56 |
Jeffrey Lin | e66475e | 2016-07-11 17:01:17 -0700 | [diff] [blame] | 59 | #define RM_PACKET_CRC_SIZE 2 |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 60 | |
| 61 | /* Touch relative info */ |
| 62 | #define RM_MAX_RETRIES 3 |
| 63 | #define RM_MAX_TOUCH_NUM 10 |
| 64 | #define RM_BOOT_DELAY_MS 100 |
| 65 | |
| 66 | /* Offsets in contact data */ |
| 67 | #define RM_CONTACT_STATE_POS 0 |
| 68 | #define RM_CONTACT_X_POS 1 |
| 69 | #define RM_CONTACT_Y_POS 3 |
| 70 | #define RM_CONTACT_PRESSURE_POS 5 |
| 71 | #define RM_CONTACT_WIDTH_X_POS 6 |
| 72 | #define RM_CONTACT_WIDTH_Y_POS 7 |
| 73 | |
| 74 | /* Bootloader relative info */ |
| 75 | #define RM_BL_WRT_CMD_SIZE 3 /* bl flash wrt cmd size */ |
| 76 | #define RM_BL_WRT_PKG_SIZE 32 /* bl wrt pkg size */ |
| 77 | #define RM_BL_WRT_LEN (RM_BL_WRT_PKG_SIZE + RM_BL_WRT_CMD_SIZE) |
| 78 | #define RM_FW_PAGE_SIZE 128 |
| 79 | #define RM_MAX_FW_RETRIES 30 |
| 80 | #define RM_MAX_FW_SIZE 0xD000 |
| 81 | |
| 82 | #define RM_POWERON_DELAY_USEC 500 |
| 83 | #define RM_RESET_DELAY_MSEC 50 |
| 84 | |
| 85 | enum raydium_bl_cmd { |
| 86 | BL_HEADER = 0, |
| 87 | BL_PAGE_STR, |
| 88 | BL_PKG_IDX, |
| 89 | BL_DATA_STR, |
| 90 | }; |
| 91 | |
| 92 | enum raydium_bl_ack { |
| 93 | RAYDIUM_ACK_NULL = 0, |
| 94 | RAYDIUM_WAIT_READY, |
| 95 | RAYDIUM_PATH_READY, |
| 96 | }; |
| 97 | |
| 98 | enum raydium_boot_mode { |
| 99 | RAYDIUM_TS_MAIN = 0, |
| 100 | RAYDIUM_TS_BLDR, |
| 101 | }; |
| 102 | |
| 103 | /* Response to RM_CMD_DATA_BANK request */ |
| 104 | struct raydium_data_info { |
| 105 | __le32 data_bank_addr; |
| 106 | u8 pkg_size; |
| 107 | u8 tp_info_size; |
| 108 | }; |
| 109 | |
| 110 | struct raydium_info { |
| 111 | __le32 hw_ver; /*device version */ |
| 112 | u8 main_ver; |
| 113 | u8 sub_ver; |
| 114 | __le16 ft_ver; /* test version */ |
| 115 | u8 x_num; |
| 116 | u8 y_num; |
| 117 | __le16 x_max; |
| 118 | __le16 y_max; |
| 119 | u8 x_res; /* units/mm */ |
| 120 | u8 y_res; /* units/mm */ |
| 121 | }; |
| 122 | |
| 123 | /* struct raydium_data - represents state of Raydium touchscreen device */ |
| 124 | struct raydium_data { |
| 125 | struct i2c_client *client; |
| 126 | struct input_dev *input; |
| 127 | |
| 128 | struct regulator *avdd; |
| 129 | struct regulator *vccio; |
| 130 | struct gpio_desc *reset_gpio; |
| 131 | |
| 132 | struct raydium_info info; |
| 133 | |
| 134 | struct mutex sysfs_mutex; |
| 135 | |
| 136 | u8 *report_data; |
| 137 | |
| 138 | u32 data_bank_addr; |
| 139 | u8 report_size; |
| 140 | u8 contact_size; |
Jeffrey Lin | e66475e | 2016-07-11 17:01:17 -0700 | [diff] [blame] | 141 | u8 pkg_size; |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 142 | |
| 143 | enum raydium_boot_mode boot_mode; |
| 144 | |
| 145 | bool wake_irq_enabled; |
| 146 | }; |
| 147 | |
| 148 | static int raydium_i2c_send(struct i2c_client *client, |
| 149 | u8 addr, const void *data, size_t len) |
| 150 | { |
| 151 | u8 *buf; |
| 152 | int tries = 0; |
| 153 | int ret; |
| 154 | |
| 155 | buf = kmalloc(len + 1, GFP_KERNEL); |
| 156 | if (!buf) |
| 157 | return -ENOMEM; |
| 158 | |
| 159 | buf[0] = addr; |
| 160 | memcpy(buf + 1, data, len); |
| 161 | |
| 162 | do { |
| 163 | ret = i2c_master_send(client, buf, len + 1); |
| 164 | if (likely(ret == len + 1)) |
| 165 | break; |
| 166 | |
| 167 | msleep(20); |
| 168 | } while (++tries < RM_MAX_RETRIES); |
| 169 | |
| 170 | kfree(buf); |
| 171 | |
| 172 | if (unlikely(ret != len + 1)) { |
| 173 | if (ret >= 0) |
| 174 | ret = -EIO; |
| 175 | dev_err(&client->dev, "%s failed: %d\n", __func__, ret); |
| 176 | return ret; |
| 177 | } |
| 178 | |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | static int raydium_i2c_read(struct i2c_client *client, |
| 183 | u8 addr, void *data, size_t len) |
| 184 | { |
| 185 | struct i2c_msg xfer[] = { |
| 186 | { |
| 187 | .addr = client->addr, |
| 188 | .len = 1, |
| 189 | .buf = &addr, |
| 190 | }, |
| 191 | { |
| 192 | .addr = client->addr, |
| 193 | .flags = I2C_M_RD, |
| 194 | .len = len, |
| 195 | .buf = data, |
| 196 | } |
| 197 | }; |
| 198 | int ret; |
| 199 | |
| 200 | ret = i2c_transfer(client->adapter, xfer, ARRAY_SIZE(xfer)); |
| 201 | if (unlikely(ret != ARRAY_SIZE(xfer))) |
| 202 | return ret < 0 ? ret : -EIO; |
| 203 | |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | static int raydium_i2c_read_message(struct i2c_client *client, |
| 208 | u32 addr, void *data, size_t len) |
| 209 | { |
| 210 | __be32 be_addr; |
| 211 | size_t xfer_len; |
| 212 | int error; |
| 213 | |
| 214 | while (len) { |
| 215 | xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE); |
| 216 | |
| 217 | be_addr = cpu_to_be32(addr); |
| 218 | |
| 219 | error = raydium_i2c_send(client, RM_CMD_BANK_SWITCH, |
| 220 | &be_addr, sizeof(be_addr)); |
| 221 | if (!error) |
| 222 | error = raydium_i2c_read(client, addr & 0xff, |
| 223 | data, xfer_len); |
| 224 | if (error) |
| 225 | return error; |
| 226 | |
| 227 | len -= xfer_len; |
| 228 | data += xfer_len; |
| 229 | addr += xfer_len; |
| 230 | } |
| 231 | |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | static int raydium_i2c_send_message(struct i2c_client *client, |
| 236 | u32 addr, const void *data, size_t len) |
| 237 | { |
| 238 | __be32 be_addr = cpu_to_be32(addr); |
| 239 | int error; |
| 240 | |
| 241 | error = raydium_i2c_send(client, RM_CMD_BANK_SWITCH, |
| 242 | &be_addr, sizeof(be_addr)); |
| 243 | if (!error) |
| 244 | error = raydium_i2c_send(client, addr & 0xff, data, len); |
| 245 | |
| 246 | return error; |
| 247 | } |
| 248 | |
| 249 | static int raydium_i2c_sw_reset(struct i2c_client *client) |
| 250 | { |
| 251 | const u8 soft_rst_cmd = 0x01; |
| 252 | int error; |
| 253 | |
| 254 | error = raydium_i2c_send_message(client, RM_RESET_MSG_ADDR, |
| 255 | &soft_rst_cmd, sizeof(soft_rst_cmd)); |
| 256 | if (error) { |
| 257 | dev_err(&client->dev, "software reset failed: %d\n", error); |
| 258 | return error; |
| 259 | } |
| 260 | |
| 261 | msleep(RM_RESET_DELAY_MSEC); |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | static int raydium_i2c_query_ts_info(struct raydium_data *ts) |
| 267 | { |
| 268 | struct i2c_client *client = ts->client; |
| 269 | struct raydium_data_info data_info; |
| 270 | __le32 query_bank_addr; |
| 271 | |
| 272 | int error, retry_cnt; |
| 273 | |
| 274 | for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) { |
| 275 | error = raydium_i2c_read(client, RM_CMD_DATA_BANK, |
| 276 | &data_info, sizeof(data_info)); |
| 277 | if (error) |
| 278 | continue; |
| 279 | |
| 280 | /* |
| 281 | * Warn user if we already allocated memory for reports and |
| 282 | * then the size changed (due to firmware update?) and keep |
| 283 | * old size instead. |
| 284 | */ |
Jeffrey Lin | e66475e | 2016-07-11 17:01:17 -0700 | [diff] [blame] | 285 | if (ts->report_data && ts->pkg_size != data_info.pkg_size) { |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 286 | dev_warn(&client->dev, |
| 287 | "report size changes, was: %d, new: %d\n", |
Jeffrey Lin | e66475e | 2016-07-11 17:01:17 -0700 | [diff] [blame] | 288 | ts->pkg_size, data_info.pkg_size); |
| 289 | } else { |
| 290 | ts->pkg_size = data_info.pkg_size; |
| 291 | ts->report_size = ts->pkg_size - RM_PACKET_CRC_SIZE; |
| 292 | } |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 293 | |
| 294 | ts->contact_size = data_info.tp_info_size; |
| 295 | ts->data_bank_addr = le32_to_cpu(data_info.data_bank_addr); |
| 296 | |
| 297 | dev_dbg(&client->dev, |
| 298 | "data_bank_addr: %#08x, report_size: %d, contact_size: %d\n", |
| 299 | ts->data_bank_addr, ts->report_size, ts->contact_size); |
| 300 | |
| 301 | error = raydium_i2c_read(client, RM_CMD_QUERY_BANK, |
| 302 | &query_bank_addr, |
| 303 | sizeof(query_bank_addr)); |
| 304 | if (error) |
| 305 | continue; |
| 306 | |
| 307 | error = raydium_i2c_read_message(client, |
| 308 | le32_to_cpu(query_bank_addr), |
| 309 | &ts->info, sizeof(ts->info)); |
| 310 | if (error) |
| 311 | continue; |
| 312 | |
| 313 | return 0; |
| 314 | } |
| 315 | |
| 316 | dev_err(&client->dev, "failed to query device parameters: %d\n", error); |
| 317 | return error; |
| 318 | } |
| 319 | |
| 320 | static int raydium_i2c_check_fw_status(struct raydium_data *ts) |
| 321 | { |
| 322 | struct i2c_client *client = ts->client; |
| 323 | static const u8 bl_ack = 0x62; |
| 324 | static const u8 main_ack = 0x66; |
| 325 | u8 buf[4]; |
| 326 | int error; |
| 327 | |
| 328 | error = raydium_i2c_read(client, RM_CMD_BOOT_READ, buf, sizeof(buf)); |
| 329 | if (!error) { |
| 330 | if (buf[0] == bl_ack) |
| 331 | ts->boot_mode = RAYDIUM_TS_BLDR; |
| 332 | else if (buf[0] == main_ack) |
| 333 | ts->boot_mode = RAYDIUM_TS_MAIN; |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | return error; |
| 338 | } |
| 339 | |
| 340 | static int raydium_i2c_initialize(struct raydium_data *ts) |
| 341 | { |
| 342 | struct i2c_client *client = ts->client; |
| 343 | int error, retry_cnt; |
| 344 | |
| 345 | for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) { |
| 346 | /* Wait for Hello packet */ |
| 347 | msleep(RM_BOOT_DELAY_MS); |
| 348 | |
| 349 | error = raydium_i2c_check_fw_status(ts); |
| 350 | if (error) { |
| 351 | dev_err(&client->dev, |
| 352 | "failed to read 'hello' packet: %d\n", error); |
| 353 | continue; |
| 354 | } |
| 355 | |
| 356 | if (ts->boot_mode == RAYDIUM_TS_BLDR || |
| 357 | ts->boot_mode == RAYDIUM_TS_MAIN) { |
| 358 | break; |
| 359 | } |
| 360 | } |
| 361 | |
| 362 | if (error) |
| 363 | ts->boot_mode = RAYDIUM_TS_BLDR; |
| 364 | |
| 365 | if (ts->boot_mode == RAYDIUM_TS_BLDR) { |
| 366 | ts->info.hw_ver = cpu_to_le32(0xffffffffUL); |
| 367 | ts->info.main_ver = 0xff; |
| 368 | ts->info.sub_ver = 0xff; |
| 369 | } else { |
| 370 | raydium_i2c_query_ts_info(ts); |
| 371 | } |
| 372 | |
| 373 | return error; |
| 374 | } |
| 375 | |
| 376 | static int raydium_i2c_bl_chk_state(struct i2c_client *client, |
| 377 | enum raydium_bl_ack state) |
| 378 | { |
| 379 | static const u8 ack_ok[] = { 0xFF, 0x39, 0x30, 0x30, 0x54 }; |
| 380 | u8 rbuf[sizeof(ack_ok)]; |
| 381 | u8 retry; |
| 382 | int error; |
| 383 | |
| 384 | for (retry = 0; retry < RM_MAX_FW_RETRIES; retry++) { |
| 385 | switch (state) { |
| 386 | case RAYDIUM_ACK_NULL: |
| 387 | return 0; |
| 388 | |
| 389 | case RAYDIUM_WAIT_READY: |
| 390 | error = raydium_i2c_read(client, RM_CMD_BOOT_CHK, |
| 391 | &rbuf[0], 1); |
| 392 | if (!error && rbuf[0] == RM_BOOT_RDY) |
| 393 | return 0; |
| 394 | |
| 395 | break; |
| 396 | |
| 397 | case RAYDIUM_PATH_READY: |
| 398 | error = raydium_i2c_read(client, RM_CMD_BOOT_CHK, |
| 399 | rbuf, sizeof(rbuf)); |
| 400 | if (!error && !memcmp(rbuf, ack_ok, sizeof(ack_ok))) |
| 401 | return 0; |
| 402 | |
| 403 | break; |
| 404 | |
| 405 | default: |
| 406 | dev_err(&client->dev, "%s: invalid target state %d\n", |
| 407 | __func__, state); |
| 408 | return -EINVAL; |
| 409 | } |
| 410 | |
| 411 | msleep(20); |
| 412 | } |
| 413 | |
| 414 | return -ETIMEDOUT; |
| 415 | } |
| 416 | |
| 417 | static int raydium_i2c_write_object(struct i2c_client *client, |
| 418 | const void *data, size_t len, |
| 419 | enum raydium_bl_ack state) |
| 420 | { |
| 421 | int error; |
| 422 | |
| 423 | error = raydium_i2c_send(client, RM_CMD_BOOT_WRT, data, len); |
| 424 | if (error) { |
| 425 | dev_err(&client->dev, "WRT obj command failed: %d\n", |
| 426 | error); |
| 427 | return error; |
| 428 | } |
| 429 | |
| 430 | error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, NULL, 0); |
| 431 | if (error) { |
| 432 | dev_err(&client->dev, "Ack obj command failed: %d\n", error); |
| 433 | return error; |
| 434 | } |
| 435 | |
| 436 | error = raydium_i2c_bl_chk_state(client, state); |
| 437 | if (error) { |
| 438 | dev_err(&client->dev, "BL check state failed: %d\n", error); |
| 439 | return error; |
| 440 | } |
| 441 | return 0; |
| 442 | } |
| 443 | |
| 444 | static bool raydium_i2c_boot_trigger(struct i2c_client *client) |
| 445 | { |
| 446 | static const u8 cmd[7][6] = { |
| 447 | { 0x08, 0x0C, 0x09, 0x00, 0x50, 0xD7 }, |
| 448 | { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 }, |
| 449 | { 0x08, 0x04, 0x09, 0x00, 0x50, 0x00 }, |
| 450 | { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 }, |
| 451 | { 0x08, 0x0C, 0x09, 0x00, 0x50, 0x00 }, |
| 452 | { 0x06, 0x01, 0x00, 0x00, 0x00, 0x00 }, |
| 453 | { 0x02, 0xA2, 0x00, 0x00, 0x00, 0x00 }, |
| 454 | }; |
| 455 | int i; |
| 456 | int error; |
| 457 | |
| 458 | for (i = 0; i < 7; i++) { |
| 459 | error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]), |
| 460 | RAYDIUM_WAIT_READY); |
| 461 | if (error) { |
| 462 | dev_err(&client->dev, |
| 463 | "boot trigger failed at step %d: %d\n", |
| 464 | i, error); |
| 465 | return error; |
| 466 | } |
| 467 | } |
| 468 | |
Gustavo A. R. Silva | 6cad4e2 | 2018-08-06 15:20:19 -0700 | [diff] [blame] | 469 | return false; |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | static bool raydium_i2c_fw_trigger(struct i2c_client *client) |
| 473 | { |
| 474 | static const u8 cmd[5][11] = { |
| 475 | { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0xD7, 0, 0, 0 }, |
| 476 | { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 }, |
| 477 | { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 }, |
| 478 | { 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 }, |
| 479 | { 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 }, |
| 480 | }; |
| 481 | int i; |
| 482 | int error; |
| 483 | |
| 484 | for (i = 0; i < 5; i++) { |
| 485 | error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]), |
| 486 | RAYDIUM_ACK_NULL); |
| 487 | if (error) { |
| 488 | dev_err(&client->dev, |
| 489 | "fw trigger failed at step %d: %d\n", |
| 490 | i, error); |
| 491 | return error; |
| 492 | } |
| 493 | } |
| 494 | |
Gustavo A. R. Silva | 6cad4e2 | 2018-08-06 15:20:19 -0700 | [diff] [blame] | 495 | return false; |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | static int raydium_i2c_check_path(struct i2c_client *client) |
| 499 | { |
| 500 | static const u8 cmd[] = { 0x09, 0x00, 0x09, 0x00, 0x50, 0x10, 0x00 }; |
| 501 | int error; |
| 502 | |
| 503 | error = raydium_i2c_write_object(client, cmd, sizeof(cmd), |
| 504 | RAYDIUM_PATH_READY); |
| 505 | if (error) { |
| 506 | dev_err(&client->dev, "check path command failed: %d\n", error); |
| 507 | return error; |
| 508 | } |
| 509 | |
| 510 | return 0; |
| 511 | } |
| 512 | |
| 513 | static int raydium_i2c_enter_bl(struct i2c_client *client) |
| 514 | { |
| 515 | static const u8 cal_cmd[] = { 0x00, 0x01, 0x52 }; |
| 516 | int error; |
| 517 | |
| 518 | error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd), |
| 519 | RAYDIUM_ACK_NULL); |
| 520 | if (error) { |
| 521 | dev_err(&client->dev, "enter bl command failed: %d\n", error); |
| 522 | return error; |
| 523 | } |
| 524 | |
| 525 | msleep(RM_BOOT_DELAY_MS); |
| 526 | return 0; |
| 527 | } |
| 528 | |
| 529 | static int raydium_i2c_leave_bl(struct i2c_client *client) |
| 530 | { |
| 531 | static const u8 leave_cmd[] = { 0x05, 0x00 }; |
| 532 | int error; |
| 533 | |
| 534 | error = raydium_i2c_write_object(client, leave_cmd, sizeof(leave_cmd), |
| 535 | RAYDIUM_ACK_NULL); |
| 536 | if (error) { |
| 537 | dev_err(&client->dev, "leave bl command failed: %d\n", error); |
| 538 | return error; |
| 539 | } |
| 540 | |
| 541 | msleep(RM_BOOT_DELAY_MS); |
| 542 | return 0; |
| 543 | } |
| 544 | |
| 545 | static int raydium_i2c_write_checksum(struct i2c_client *client, |
| 546 | size_t length, u16 checksum) |
| 547 | { |
| 548 | u8 checksum_cmd[] = { 0x00, 0x05, 0x6D, 0x00, 0x00, 0x00, 0x00 }; |
| 549 | int error; |
| 550 | |
| 551 | put_unaligned_le16(length, &checksum_cmd[3]); |
| 552 | put_unaligned_le16(checksum, &checksum_cmd[5]); |
| 553 | |
| 554 | error = raydium_i2c_write_object(client, |
| 555 | checksum_cmd, sizeof(checksum_cmd), |
| 556 | RAYDIUM_ACK_NULL); |
| 557 | if (error) { |
| 558 | dev_err(&client->dev, "failed to write checksum: %d\n", |
| 559 | error); |
| 560 | return error; |
| 561 | } |
| 562 | |
| 563 | return 0; |
| 564 | } |
| 565 | |
| 566 | static int raydium_i2c_disable_watch_dog(struct i2c_client *client) |
| 567 | { |
| 568 | static const u8 cmd[] = { 0x0A, 0xAA }; |
| 569 | int error; |
| 570 | |
| 571 | error = raydium_i2c_write_object(client, cmd, sizeof(cmd), |
| 572 | RAYDIUM_WAIT_READY); |
| 573 | if (error) { |
| 574 | dev_err(&client->dev, "disable watchdog command failed: %d\n", |
| 575 | error); |
| 576 | return error; |
| 577 | } |
| 578 | |
| 579 | return 0; |
| 580 | } |
| 581 | |
| 582 | static int raydium_i2c_fw_write_page(struct i2c_client *client, |
| 583 | u16 page_idx, const void *data, size_t len) |
| 584 | { |
| 585 | u8 buf[RM_BL_WRT_LEN]; |
| 586 | size_t xfer_len; |
| 587 | int error; |
| 588 | int i; |
| 589 | |
| 590 | BUILD_BUG_ON((RM_FW_PAGE_SIZE % RM_BL_WRT_PKG_SIZE) != 0); |
| 591 | |
| 592 | for (i = 0; i < RM_FW_PAGE_SIZE / RM_BL_WRT_PKG_SIZE; i++) { |
| 593 | buf[BL_HEADER] = RM_CMD_BOOT_PAGE_WRT; |
| 594 | buf[BL_PAGE_STR] = page_idx ? 0xff : 0; |
| 595 | buf[BL_PKG_IDX] = i + 1; |
| 596 | |
| 597 | xfer_len = min_t(size_t, len, RM_BL_WRT_PKG_SIZE); |
| 598 | memcpy(&buf[BL_DATA_STR], data, xfer_len); |
| 599 | if (len < RM_BL_WRT_PKG_SIZE) |
| 600 | memset(&buf[BL_DATA_STR + xfer_len], 0xff, |
| 601 | RM_BL_WRT_PKG_SIZE - xfer_len); |
| 602 | |
| 603 | error = raydium_i2c_write_object(client, buf, RM_BL_WRT_LEN, |
| 604 | RAYDIUM_WAIT_READY); |
| 605 | if (error) { |
| 606 | dev_err(&client->dev, |
| 607 | "page write command failed for page %d, chunk %d: %d\n", |
| 608 | page_idx, i, error); |
| 609 | return error; |
| 610 | } |
| 611 | |
| 612 | data += xfer_len; |
| 613 | len -= xfer_len; |
| 614 | } |
| 615 | |
| 616 | return error; |
| 617 | } |
| 618 | |
Jeffrey Lin | e66475e | 2016-07-11 17:01:17 -0700 | [diff] [blame] | 619 | static u16 raydium_calc_chksum(const u8 *buf, u16 len) |
| 620 | { |
| 621 | u16 checksum = 0; |
| 622 | u16 i; |
| 623 | |
| 624 | for (i = 0; i < len; i++) |
| 625 | checksum += buf[i]; |
| 626 | |
| 627 | return checksum; |
| 628 | } |
| 629 | |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 630 | static int raydium_i2c_do_update_firmware(struct raydium_data *ts, |
| 631 | const struct firmware *fw) |
| 632 | { |
| 633 | struct i2c_client *client = ts->client; |
| 634 | const void *data; |
| 635 | size_t data_len; |
| 636 | size_t len; |
| 637 | int page_nr; |
| 638 | int i; |
| 639 | int error; |
| 640 | u16 fw_checksum; |
| 641 | |
| 642 | if (fw->size == 0 || fw->size > RM_MAX_FW_SIZE) { |
| 643 | dev_err(&client->dev, "Invalid firmware length\n"); |
| 644 | return -EINVAL; |
| 645 | } |
| 646 | |
| 647 | error = raydium_i2c_check_fw_status(ts); |
| 648 | if (error) { |
| 649 | dev_err(&client->dev, "Unable to access IC %d\n", error); |
| 650 | return error; |
| 651 | } |
| 652 | |
| 653 | if (ts->boot_mode == RAYDIUM_TS_MAIN) { |
| 654 | for (i = 0; i < RM_MAX_RETRIES; i++) { |
| 655 | error = raydium_i2c_enter_bl(client); |
| 656 | if (!error) { |
| 657 | error = raydium_i2c_check_fw_status(ts); |
| 658 | if (error) { |
| 659 | dev_err(&client->dev, |
| 660 | "unable to access IC: %d\n", |
| 661 | error); |
| 662 | return error; |
| 663 | } |
| 664 | |
| 665 | if (ts->boot_mode == RAYDIUM_TS_BLDR) |
| 666 | break; |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | if (ts->boot_mode == RAYDIUM_TS_MAIN) { |
| 671 | dev_err(&client->dev, |
Colin Ian King | fac96cc | 2016-11-16 17:19:57 -0800 | [diff] [blame] | 672 | "failed to jump to boot loader: %d\n", |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 673 | error); |
| 674 | return -EIO; |
| 675 | } |
| 676 | } |
| 677 | |
| 678 | error = raydium_i2c_disable_watch_dog(client); |
| 679 | if (error) |
| 680 | return error; |
| 681 | |
| 682 | error = raydium_i2c_check_path(client); |
| 683 | if (error) |
| 684 | return error; |
| 685 | |
| 686 | error = raydium_i2c_boot_trigger(client); |
| 687 | if (error) { |
| 688 | dev_err(&client->dev, "send boot trigger fail: %d\n", error); |
| 689 | return error; |
| 690 | } |
| 691 | |
| 692 | msleep(RM_BOOT_DELAY_MS); |
| 693 | |
| 694 | data = fw->data; |
| 695 | data_len = fw->size; |
| 696 | page_nr = 0; |
| 697 | |
| 698 | while (data_len) { |
| 699 | len = min_t(size_t, data_len, RM_FW_PAGE_SIZE); |
| 700 | |
| 701 | error = raydium_i2c_fw_write_page(client, page_nr++, data, len); |
| 702 | if (error) |
| 703 | return error; |
| 704 | |
| 705 | msleep(20); |
| 706 | |
| 707 | data += len; |
| 708 | data_len -= len; |
| 709 | } |
| 710 | |
| 711 | error = raydium_i2c_leave_bl(client); |
| 712 | if (error) { |
| 713 | dev_err(&client->dev, |
| 714 | "failed to leave boot loader: %d\n", error); |
| 715 | return error; |
| 716 | } |
| 717 | |
| 718 | dev_dbg(&client->dev, "left boot loader mode\n"); |
| 719 | msleep(RM_BOOT_DELAY_MS); |
| 720 | |
| 721 | error = raydium_i2c_check_fw_status(ts); |
| 722 | if (error) { |
| 723 | dev_err(&client->dev, |
| 724 | "failed to check fw status after write: %d\n", |
| 725 | error); |
| 726 | return error; |
| 727 | } |
| 728 | |
| 729 | if (ts->boot_mode != RAYDIUM_TS_MAIN) { |
| 730 | dev_err(&client->dev, |
| 731 | "failed to switch to main fw after writing firmware: %d\n", |
| 732 | error); |
| 733 | return -EINVAL; |
| 734 | } |
| 735 | |
| 736 | error = raydium_i2c_fw_trigger(client); |
| 737 | if (error) { |
| 738 | dev_err(&client->dev, "failed to trigger fw: %d\n", error); |
| 739 | return error; |
| 740 | } |
| 741 | |
Jeffrey Lin | e66475e | 2016-07-11 17:01:17 -0700 | [diff] [blame] | 742 | fw_checksum = raydium_calc_chksum(fw->data, fw->size); |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 743 | |
| 744 | error = raydium_i2c_write_checksum(client, fw->size, fw_checksum); |
| 745 | if (error) |
| 746 | return error; |
| 747 | |
| 748 | return 0; |
| 749 | } |
| 750 | |
| 751 | static int raydium_i2c_fw_update(struct raydium_data *ts) |
| 752 | { |
| 753 | struct i2c_client *client = ts->client; |
| 754 | const struct firmware *fw = NULL; |
Jeffrey Lin | 92a3743 | 2018-01-04 21:35:23 -0800 | [diff] [blame] | 755 | char *fw_file; |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 756 | int error; |
| 757 | |
Jeffrey Lin | 92a3743 | 2018-01-04 21:35:23 -0800 | [diff] [blame] | 758 | fw_file = kasprintf(GFP_KERNEL, "raydium_%#04x.fw", |
| 759 | le32_to_cpu(ts->info.hw_ver)); |
| 760 | if (!fw_file) |
| 761 | return -ENOMEM; |
| 762 | |
| 763 | dev_dbg(&client->dev, "firmware name: %s\n", fw_file); |
| 764 | |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 765 | error = request_firmware(&fw, fw_file, &client->dev); |
| 766 | if (error) { |
| 767 | dev_err(&client->dev, "Unable to open firmware %s\n", fw_file); |
Jeffrey Lin | 92a3743 | 2018-01-04 21:35:23 -0800 | [diff] [blame] | 768 | goto out_free_fw_file; |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 769 | } |
| 770 | |
| 771 | disable_irq(client->irq); |
| 772 | |
| 773 | error = raydium_i2c_do_update_firmware(ts, fw); |
| 774 | if (error) { |
| 775 | dev_err(&client->dev, "firmware update failed: %d\n", error); |
| 776 | ts->boot_mode = RAYDIUM_TS_BLDR; |
| 777 | goto out_enable_irq; |
| 778 | } |
| 779 | |
| 780 | error = raydium_i2c_initialize(ts); |
| 781 | if (error) { |
| 782 | dev_err(&client->dev, |
| 783 | "failed to initialize device after firmware update: %d\n", |
| 784 | error); |
| 785 | ts->boot_mode = RAYDIUM_TS_BLDR; |
| 786 | goto out_enable_irq; |
| 787 | } |
| 788 | |
| 789 | ts->boot_mode = RAYDIUM_TS_MAIN; |
| 790 | |
| 791 | out_enable_irq: |
| 792 | enable_irq(client->irq); |
| 793 | msleep(100); |
| 794 | |
| 795 | release_firmware(fw); |
| 796 | |
Jeffrey Lin | 92a3743 | 2018-01-04 21:35:23 -0800 | [diff] [blame] | 797 | out_free_fw_file: |
| 798 | kfree(fw_file); |
| 799 | |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 800 | return error; |
| 801 | } |
| 802 | |
| 803 | static void raydium_mt_event(struct raydium_data *ts) |
| 804 | { |
| 805 | int i; |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 806 | |
| 807 | for (i = 0; i < ts->report_size / ts->contact_size; i++) { |
| 808 | u8 *contact = &ts->report_data[ts->contact_size * i]; |
| 809 | bool state = contact[RM_CONTACT_STATE_POS]; |
| 810 | u8 wx, wy; |
| 811 | |
| 812 | input_mt_slot(ts->input, i); |
| 813 | input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, state); |
| 814 | |
| 815 | if (!state) |
| 816 | continue; |
| 817 | |
| 818 | input_report_abs(ts->input, ABS_MT_POSITION_X, |
| 819 | get_unaligned_le16(&contact[RM_CONTACT_X_POS])); |
| 820 | input_report_abs(ts->input, ABS_MT_POSITION_Y, |
| 821 | get_unaligned_le16(&contact[RM_CONTACT_Y_POS])); |
| 822 | input_report_abs(ts->input, ABS_MT_PRESSURE, |
| 823 | contact[RM_CONTACT_PRESSURE_POS]); |
| 824 | |
| 825 | wx = contact[RM_CONTACT_WIDTH_X_POS]; |
| 826 | wy = contact[RM_CONTACT_WIDTH_Y_POS]; |
| 827 | |
| 828 | input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, max(wx, wy)); |
| 829 | input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, min(wx, wy)); |
| 830 | } |
| 831 | |
| 832 | input_mt_sync_frame(ts->input); |
| 833 | input_sync(ts->input); |
| 834 | } |
| 835 | |
| 836 | static irqreturn_t raydium_i2c_irq(int irq, void *_dev) |
| 837 | { |
| 838 | struct raydium_data *ts = _dev; |
Jeffrey Lin | e66475e | 2016-07-11 17:01:17 -0700 | [diff] [blame] | 839 | int error; |
| 840 | u16 fw_crc; |
| 841 | u16 calc_crc; |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 842 | |
Jeffrey Lin | e66475e | 2016-07-11 17:01:17 -0700 | [diff] [blame] | 843 | if (ts->boot_mode != RAYDIUM_TS_MAIN) |
| 844 | goto out; |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 845 | |
Jeffrey Lin | e66475e | 2016-07-11 17:01:17 -0700 | [diff] [blame] | 846 | error = raydium_i2c_read_message(ts->client, ts->data_bank_addr, |
| 847 | ts->report_data, ts->pkg_size); |
| 848 | if (error) |
| 849 | goto out; |
| 850 | |
| 851 | fw_crc = get_unaligned_le16(&ts->report_data[ts->report_size]); |
| 852 | calc_crc = raydium_calc_chksum(ts->report_data, ts->report_size); |
| 853 | if (unlikely(fw_crc != calc_crc)) { |
| 854 | dev_warn(&ts->client->dev, |
| 855 | "%s: invalid packet crc %#04x vs %#04x\n", |
| 856 | __func__, calc_crc, fw_crc); |
| 857 | goto out; |
| 858 | } |
| 859 | |
| 860 | raydium_mt_event(ts); |
| 861 | |
| 862 | out: |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 863 | return IRQ_HANDLED; |
| 864 | } |
| 865 | |
| 866 | static ssize_t raydium_i2c_fw_ver_show(struct device *dev, |
| 867 | struct device_attribute *attr, char *buf) |
| 868 | { |
| 869 | struct i2c_client *client = to_i2c_client(dev); |
| 870 | struct raydium_data *ts = i2c_get_clientdata(client); |
| 871 | |
| 872 | return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver); |
| 873 | } |
| 874 | |
| 875 | static ssize_t raydium_i2c_hw_ver_show(struct device *dev, |
| 876 | struct device_attribute *attr, char *buf) |
| 877 | { |
| 878 | struct i2c_client *client = to_i2c_client(dev); |
| 879 | struct raydium_data *ts = i2c_get_clientdata(client); |
| 880 | |
| 881 | return sprintf(buf, "%#04x\n", le32_to_cpu(ts->info.hw_ver)); |
| 882 | } |
| 883 | |
| 884 | static ssize_t raydium_i2c_boot_mode_show(struct device *dev, |
| 885 | struct device_attribute *attr, |
| 886 | char *buf) |
| 887 | { |
| 888 | struct i2c_client *client = to_i2c_client(dev); |
| 889 | struct raydium_data *ts = i2c_get_clientdata(client); |
| 890 | |
| 891 | return sprintf(buf, "%s\n", |
| 892 | ts->boot_mode == RAYDIUM_TS_MAIN ? |
| 893 | "Normal" : "Recovery"); |
| 894 | } |
| 895 | |
| 896 | static ssize_t raydium_i2c_update_fw_store(struct device *dev, |
| 897 | struct device_attribute *attr, |
| 898 | const char *buf, size_t count) |
| 899 | { |
| 900 | struct i2c_client *client = to_i2c_client(dev); |
| 901 | struct raydium_data *ts = i2c_get_clientdata(client); |
| 902 | int error; |
| 903 | |
| 904 | error = mutex_lock_interruptible(&ts->sysfs_mutex); |
| 905 | if (error) |
| 906 | return error; |
| 907 | |
| 908 | error = raydium_i2c_fw_update(ts); |
| 909 | |
| 910 | mutex_unlock(&ts->sysfs_mutex); |
| 911 | |
| 912 | return error ?: count; |
| 913 | } |
| 914 | |
| 915 | static ssize_t raydium_i2c_calibrate_store(struct device *dev, |
| 916 | struct device_attribute *attr, |
| 917 | const char *buf, size_t count) |
| 918 | { |
| 919 | struct i2c_client *client = to_i2c_client(dev); |
| 920 | struct raydium_data *ts = i2c_get_clientdata(client); |
| 921 | static const u8 cal_cmd[] = { 0x00, 0x01, 0x9E }; |
| 922 | int error; |
| 923 | |
| 924 | error = mutex_lock_interruptible(&ts->sysfs_mutex); |
| 925 | if (error) |
| 926 | return error; |
| 927 | |
| 928 | error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd), |
| 929 | RAYDIUM_WAIT_READY); |
| 930 | if (error) |
| 931 | dev_err(&client->dev, "calibrate command failed: %d\n", error); |
| 932 | |
| 933 | mutex_unlock(&ts->sysfs_mutex); |
| 934 | return error ?: count; |
| 935 | } |
| 936 | |
| 937 | static DEVICE_ATTR(fw_version, S_IRUGO, raydium_i2c_fw_ver_show, NULL); |
| 938 | static DEVICE_ATTR(hw_version, S_IRUGO, raydium_i2c_hw_ver_show, NULL); |
| 939 | static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_i2c_boot_mode_show, NULL); |
| 940 | static DEVICE_ATTR(update_fw, S_IWUSR, NULL, raydium_i2c_update_fw_store); |
| 941 | static DEVICE_ATTR(calibrate, S_IWUSR, NULL, raydium_i2c_calibrate_store); |
| 942 | |
| 943 | static struct attribute *raydium_i2c_attributes[] = { |
| 944 | &dev_attr_update_fw.attr, |
| 945 | &dev_attr_boot_mode.attr, |
| 946 | &dev_attr_fw_version.attr, |
| 947 | &dev_attr_hw_version.attr, |
| 948 | &dev_attr_calibrate.attr, |
| 949 | NULL |
| 950 | }; |
| 951 | |
Arvind Yadav | d653386 | 2017-07-10 20:23:06 -0700 | [diff] [blame] | 952 | static const struct attribute_group raydium_i2c_attribute_group = { |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 953 | .attrs = raydium_i2c_attributes, |
| 954 | }; |
| 955 | |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 956 | static int raydium_i2c_power_on(struct raydium_data *ts) |
| 957 | { |
| 958 | int error; |
| 959 | |
Dmitry Torokhov | cd46729 | 2016-05-31 18:15:04 -0700 | [diff] [blame] | 960 | if (!ts->reset_gpio) |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 961 | return 0; |
| 962 | |
| 963 | gpiod_set_value_cansleep(ts->reset_gpio, 1); |
| 964 | |
| 965 | error = regulator_enable(ts->avdd); |
| 966 | if (error) { |
| 967 | dev_err(&ts->client->dev, |
| 968 | "failed to enable avdd regulator: %d\n", error); |
| 969 | goto release_reset_gpio; |
| 970 | } |
| 971 | |
| 972 | error = regulator_enable(ts->vccio); |
| 973 | if (error) { |
| 974 | regulator_disable(ts->avdd); |
| 975 | dev_err(&ts->client->dev, |
| 976 | "failed to enable vccio regulator: %d\n", error); |
| 977 | goto release_reset_gpio; |
| 978 | } |
| 979 | |
| 980 | udelay(RM_POWERON_DELAY_USEC); |
| 981 | |
| 982 | release_reset_gpio: |
| 983 | gpiod_set_value_cansleep(ts->reset_gpio, 0); |
| 984 | |
| 985 | if (error) |
| 986 | return error; |
| 987 | |
| 988 | msleep(RM_RESET_DELAY_MSEC); |
| 989 | |
| 990 | return 0; |
| 991 | } |
| 992 | |
| 993 | static void raydium_i2c_power_off(void *_data) |
| 994 | { |
| 995 | struct raydium_data *ts = _data; |
| 996 | |
Dmitry Torokhov | cd46729 | 2016-05-31 18:15:04 -0700 | [diff] [blame] | 997 | if (ts->reset_gpio) { |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 998 | gpiod_set_value_cansleep(ts->reset_gpio, 1); |
| 999 | regulator_disable(ts->vccio); |
| 1000 | regulator_disable(ts->avdd); |
| 1001 | } |
| 1002 | } |
| 1003 | |
| 1004 | static int raydium_i2c_probe(struct i2c_client *client, |
| 1005 | const struct i2c_device_id *id) |
| 1006 | { |
| 1007 | union i2c_smbus_data dummy; |
| 1008 | struct raydium_data *ts; |
| 1009 | int error; |
| 1010 | |
| 1011 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { |
| 1012 | dev_err(&client->dev, |
| 1013 | "i2c check functionality error (need I2C_FUNC_I2C)\n"); |
| 1014 | return -ENXIO; |
| 1015 | } |
| 1016 | |
| 1017 | ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); |
| 1018 | if (!ts) |
| 1019 | return -ENOMEM; |
| 1020 | |
| 1021 | mutex_init(&ts->sysfs_mutex); |
| 1022 | |
| 1023 | ts->client = client; |
| 1024 | i2c_set_clientdata(client, ts); |
| 1025 | |
| 1026 | ts->avdd = devm_regulator_get(&client->dev, "avdd"); |
| 1027 | if (IS_ERR(ts->avdd)) { |
| 1028 | error = PTR_ERR(ts->avdd); |
| 1029 | if (error != -EPROBE_DEFER) |
| 1030 | dev_err(&client->dev, |
| 1031 | "Failed to get 'avdd' regulator: %d\n", error); |
| 1032 | return error; |
| 1033 | } |
| 1034 | |
| 1035 | ts->vccio = devm_regulator_get(&client->dev, "vccio"); |
| 1036 | if (IS_ERR(ts->vccio)) { |
| 1037 | error = PTR_ERR(ts->vccio); |
| 1038 | if (error != -EPROBE_DEFER) |
| 1039 | dev_err(&client->dev, |
| 1040 | "Failed to get 'vccio' regulator: %d\n", error); |
| 1041 | return error; |
| 1042 | } |
| 1043 | |
| 1044 | ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", |
| 1045 | GPIOD_OUT_LOW); |
| 1046 | if (IS_ERR(ts->reset_gpio)) { |
| 1047 | error = PTR_ERR(ts->reset_gpio); |
Dmitry Torokhov | cd46729 | 2016-05-31 18:15:04 -0700 | [diff] [blame] | 1048 | if (error != -EPROBE_DEFER) |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 1049 | dev_err(&client->dev, |
| 1050 | "failed to get reset gpio: %d\n", error); |
Dmitry Torokhov | cd46729 | 2016-05-31 18:15:04 -0700 | [diff] [blame] | 1051 | return error; |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 1052 | } |
| 1053 | |
| 1054 | error = raydium_i2c_power_on(ts); |
| 1055 | if (error) |
| 1056 | return error; |
| 1057 | |
| 1058 | error = devm_add_action(&client->dev, raydium_i2c_power_off, ts); |
| 1059 | if (error) { |
| 1060 | dev_err(&client->dev, |
| 1061 | "failed to install power off action: %d\n", error); |
| 1062 | raydium_i2c_power_off(ts); |
| 1063 | return error; |
| 1064 | } |
| 1065 | |
| 1066 | /* Make sure there is something at this address */ |
| 1067 | if (i2c_smbus_xfer(client->adapter, client->addr, 0, |
| 1068 | I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) { |
| 1069 | dev_err(&client->dev, "nothing at this address\n"); |
| 1070 | return -ENXIO; |
| 1071 | } |
| 1072 | |
| 1073 | error = raydium_i2c_initialize(ts); |
| 1074 | if (error) { |
| 1075 | dev_err(&client->dev, "failed to initialize: %d\n", error); |
| 1076 | return error; |
| 1077 | } |
| 1078 | |
| 1079 | ts->report_data = devm_kmalloc(&client->dev, |
Jeffrey Lin | e66475e | 2016-07-11 17:01:17 -0700 | [diff] [blame] | 1080 | ts->pkg_size, GFP_KERNEL); |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 1081 | if (!ts->report_data) |
| 1082 | return -ENOMEM; |
| 1083 | |
| 1084 | ts->input = devm_input_allocate_device(&client->dev); |
| 1085 | if (!ts->input) { |
| 1086 | dev_err(&client->dev, "Failed to allocate input device\n"); |
| 1087 | return -ENOMEM; |
| 1088 | } |
| 1089 | |
| 1090 | ts->input->name = "Raydium Touchscreen"; |
| 1091 | ts->input->id.bustype = BUS_I2C; |
| 1092 | |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 1093 | input_set_abs_params(ts->input, ABS_MT_POSITION_X, |
| 1094 | 0, le16_to_cpu(ts->info.x_max), 0, 0); |
| 1095 | input_set_abs_params(ts->input, ABS_MT_POSITION_Y, |
| 1096 | 0, le16_to_cpu(ts->info.y_max), 0, 0); |
| 1097 | input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res); |
| 1098 | input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res); |
| 1099 | |
| 1100 | input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); |
| 1101 | input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0); |
| 1102 | |
| 1103 | error = input_mt_init_slots(ts->input, RM_MAX_TOUCH_NUM, |
| 1104 | INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); |
| 1105 | if (error) { |
| 1106 | dev_err(&client->dev, |
| 1107 | "failed to initialize MT slots: %d\n", error); |
| 1108 | return error; |
| 1109 | } |
| 1110 | |
| 1111 | error = input_register_device(ts->input); |
| 1112 | if (error) { |
| 1113 | dev_err(&client->dev, |
| 1114 | "unable to register input device: %d\n", error); |
| 1115 | return error; |
| 1116 | } |
| 1117 | |
| 1118 | error = devm_request_threaded_irq(&client->dev, client->irq, |
| 1119 | NULL, raydium_i2c_irq, |
| 1120 | IRQF_ONESHOT, client->name, ts); |
| 1121 | if (error) { |
| 1122 | dev_err(&client->dev, "Failed to register interrupt\n"); |
| 1123 | return error; |
| 1124 | } |
| 1125 | |
Andi Shyti | b887df5 | 2017-09-29 16:38:57 -0700 | [diff] [blame] | 1126 | error = devm_device_add_group(&client->dev, |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 1127 | &raydium_i2c_attribute_group); |
| 1128 | if (error) { |
| 1129 | dev_err(&client->dev, "failed to create sysfs attributes: %d\n", |
| 1130 | error); |
| 1131 | return error; |
| 1132 | } |
| 1133 | |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 1134 | return 0; |
| 1135 | } |
| 1136 | |
| 1137 | static void __maybe_unused raydium_enter_sleep(struct i2c_client *client) |
| 1138 | { |
| 1139 | static const u8 sleep_cmd[] = { 0x5A, 0xff, 0x00, 0x0f }; |
| 1140 | int error; |
| 1141 | |
| 1142 | error = raydium_i2c_send(client, RM_CMD_ENTER_SLEEP, |
| 1143 | sleep_cmd, sizeof(sleep_cmd)); |
| 1144 | if (error) |
| 1145 | dev_err(&client->dev, |
| 1146 | "sleep command failed: %d\n", error); |
| 1147 | } |
| 1148 | |
| 1149 | static int __maybe_unused raydium_i2c_suspend(struct device *dev) |
| 1150 | { |
| 1151 | struct i2c_client *client = to_i2c_client(dev); |
| 1152 | struct raydium_data *ts = i2c_get_clientdata(client); |
| 1153 | |
| 1154 | /* Sleep is not available in BLDR recovery mode */ |
| 1155 | if (ts->boot_mode != RAYDIUM_TS_MAIN) |
Dmitry Torokhov | cd46729 | 2016-05-31 18:15:04 -0700 | [diff] [blame] | 1156 | return -EBUSY; |
Jeffrey Lin | 48a2b78 | 2016-03-31 17:03:33 -0700 | [diff] [blame] | 1157 | |
| 1158 | disable_irq(client->irq); |
| 1159 | |
| 1160 | if (device_may_wakeup(dev)) { |
| 1161 | raydium_enter_sleep(client); |
| 1162 | |
| 1163 | ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0); |
| 1164 | } else { |
| 1165 | raydium_i2c_power_off(ts); |
| 1166 | } |
| 1167 | |
| 1168 | return 0; |
| 1169 | } |
| 1170 | |
| 1171 | static int __maybe_unused raydium_i2c_resume(struct device *dev) |
| 1172 | { |
| 1173 | struct i2c_client *client = to_i2c_client(dev); |
| 1174 | struct raydium_data *ts = i2c_get_clientdata(client); |
| 1175 | |
| 1176 | if (device_may_wakeup(dev)) { |
| 1177 | if (ts->wake_irq_enabled) |
| 1178 | disable_irq_wake(client->irq); |
| 1179 | raydium_i2c_sw_reset(client); |
| 1180 | } else { |
| 1181 | raydium_i2c_power_on(ts); |
| 1182 | raydium_i2c_initialize(ts); |
| 1183 | } |
| 1184 | |
| 1185 | enable_irq(client->irq); |
| 1186 | |
| 1187 | return 0; |
| 1188 | } |
| 1189 | |
| 1190 | static SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops, |
| 1191 | raydium_i2c_suspend, raydium_i2c_resume); |
| 1192 | |
| 1193 | static const struct i2c_device_id raydium_i2c_id[] = { |
| 1194 | { "raydium_i2c" , 0 }, |
| 1195 | { "rm32380", 0 }, |
| 1196 | { /* sentinel */ } |
| 1197 | }; |
| 1198 | MODULE_DEVICE_TABLE(i2c, raydium_i2c_id); |
| 1199 | |
| 1200 | #ifdef CONFIG_ACPI |
| 1201 | static const struct acpi_device_id raydium_acpi_id[] = { |
| 1202 | { "RAYD0001", 0 }, |
| 1203 | { /* sentinel */ } |
| 1204 | }; |
| 1205 | MODULE_DEVICE_TABLE(acpi, raydium_acpi_id); |
| 1206 | #endif |
| 1207 | |
| 1208 | #ifdef CONFIG_OF |
| 1209 | static const struct of_device_id raydium_of_match[] = { |
| 1210 | { .compatible = "raydium,rm32380", }, |
| 1211 | { /* sentinel */ } |
| 1212 | }; |
| 1213 | MODULE_DEVICE_TABLE(of, raydium_of_match); |
| 1214 | #endif |
| 1215 | |
| 1216 | static struct i2c_driver raydium_i2c_driver = { |
| 1217 | .probe = raydium_i2c_probe, |
| 1218 | .id_table = raydium_i2c_id, |
| 1219 | .driver = { |
| 1220 | .name = "raydium_ts", |
| 1221 | .pm = &raydium_i2c_pm_ops, |
| 1222 | .acpi_match_table = ACPI_PTR(raydium_acpi_id), |
| 1223 | .of_match_table = of_match_ptr(raydium_of_match), |
| 1224 | }, |
| 1225 | }; |
| 1226 | module_i2c_driver(raydium_i2c_driver); |
| 1227 | |
| 1228 | MODULE_AUTHOR("Raydium"); |
| 1229 | MODULE_DESCRIPTION("Raydium I2c Touchscreen driver"); |
| 1230 | MODULE_LICENSE("GPL v2"); |