1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2012-2017 Hideep, Inc. 4 */ 5 6 #include <linux/module.h> 7 #include <linux/of.h> 8 #include <linux/firmware.h> 9 #include <linux/delay.h> 10 #include <linux/gpio/consumer.h> 11 #include <linux/i2c.h> 12 #include <linux/acpi.h> 13 #include <linux/interrupt.h> 14 #include <linux/regmap.h> 15 #include <linux/sysfs.h> 16 #include <linux/input.h> 17 #include <linux/input/mt.h> 18 #include <linux/input/touchscreen.h> 19 #include <linux/regulator/consumer.h> 20 #include <asm/unaligned.h> 21 22 #define HIDEEP_TS_NAME "HiDeep Touchscreen" 23 #define HIDEEP_I2C_NAME "hideep_ts" 24 25 #define HIDEEP_MT_MAX 10 26 #define HIDEEP_KEY_MAX 3 27 28 /* count(2) + touch data(100) + key data(6) */ 29 #define HIDEEP_MAX_EVENT 108UL 30 31 #define HIDEEP_TOUCH_EVENT_INDEX 2 32 #define HIDEEP_KEY_EVENT_INDEX 102 33 34 /* Touch & key event */ 35 #define HIDEEP_EVENT_ADDR 0x240 36 37 /* command list */ 38 #define HIDEEP_RESET_CMD 0x9800 39 40 /* event bit */ 41 #define HIDEEP_MT_RELEASED BIT(4) 42 #define HIDEEP_KEY_PRESSED BIT(7) 43 #define HIDEEP_KEY_FIRST_PRESSED BIT(8) 44 #define HIDEEP_KEY_PRESSED_MASK (HIDEEP_KEY_PRESSED | \ 45 HIDEEP_KEY_FIRST_PRESSED) 46 47 #define HIDEEP_KEY_IDX_MASK 0x0f 48 49 /* For NVM */ 50 #define HIDEEP_YRAM_BASE 0x40000000 51 #define HIDEEP_PERIPHERAL_BASE 0x50000000 52 #define HIDEEP_ESI_BASE (HIDEEP_PERIPHERAL_BASE + 0x00000000) 53 #define HIDEEP_FLASH_BASE (HIDEEP_PERIPHERAL_BASE + 0x01000000) 54 #define HIDEEP_SYSCON_BASE (HIDEEP_PERIPHERAL_BASE + 0x02000000) 55 56 #define HIDEEP_SYSCON_MOD_CON (HIDEEP_SYSCON_BASE + 0x0000) 57 #define HIDEEP_SYSCON_SPC_CON (HIDEEP_SYSCON_BASE + 0x0004) 58 #define HIDEEP_SYSCON_CLK_CON (HIDEEP_SYSCON_BASE + 0x0008) 59 #define HIDEEP_SYSCON_CLK_ENA (HIDEEP_SYSCON_BASE + 0x000C) 60 #define HIDEEP_SYSCON_RST_CON (HIDEEP_SYSCON_BASE + 0x0010) 61 #define HIDEEP_SYSCON_WDT_CON (HIDEEP_SYSCON_BASE + 0x0014) 62 #define HIDEEP_SYSCON_WDT_CNT (HIDEEP_SYSCON_BASE + 0x0018) 63 #define HIDEEP_SYSCON_PWR_CON (HIDEEP_SYSCON_BASE + 0x0020) 64 #define HIDEEP_SYSCON_PGM_ID (HIDEEP_SYSCON_BASE + 0x00F4) 65 66 #define HIDEEP_FLASH_CON (HIDEEP_FLASH_BASE + 0x0000) 67 #define HIDEEP_FLASH_STA (HIDEEP_FLASH_BASE + 0x0004) 68 #define HIDEEP_FLASH_CFG (HIDEEP_FLASH_BASE + 0x0008) 69 #define HIDEEP_FLASH_TIM (HIDEEP_FLASH_BASE + 0x000C) 70 #define HIDEEP_FLASH_CACHE_CFG (HIDEEP_FLASH_BASE + 0x0010) 71 #define HIDEEP_FLASH_PIO_SIG (HIDEEP_FLASH_BASE + 0x400000) 72 73 #define HIDEEP_ESI_TX_INVALID (HIDEEP_ESI_BASE + 0x0008) 74 75 #define HIDEEP_PERASE 0x00040000 76 #define HIDEEP_WRONLY 0x00100000 77 78 #define HIDEEP_NVM_MASK_OFS 0x0000000C 79 #define HIDEEP_NVM_DEFAULT_PAGE 0 80 #define HIDEEP_NVM_SFR_WPAGE 1 81 #define HIDEEP_NVM_SFR_RPAGE 2 82 83 #define HIDEEP_PIO_SIG 0x00400000 84 #define HIDEEP_PROT_MODE 0x03400000 85 86 #define HIDEEP_NVM_PAGE_SIZE 128 87 88 #define HIDEEP_DWZ_INFO 0x000002C0 89 90 struct hideep_event { 91 __le16 x; 92 __le16 y; 93 __le16 z; 94 u8 w; 95 u8 flag; 96 u8 type; 97 u8 index; 98 }; 99 100 struct dwz_info { 101 __be32 code_start; 102 u8 code_crc[12]; 103 104 __be32 c_code_start; 105 __be16 gen_ver; 106 __be16 c_code_len; 107 108 __be32 vr_start; 109 __be16 rsv0; 110 __be16 vr_len; 111 112 __be32 ft_start; 113 __be16 vr_version; 114 __be16 ft_len; 115 116 __be16 core_ver; 117 __be16 boot_ver; 118 119 __be16 release_ver; 120 __be16 custom_ver; 121 122 u8 factory_id; 123 u8 panel_type; 124 u8 model_name[6]; 125 126 __be16 extra_option; 127 __be16 product_code; 128 129 __be16 vendor_id; 130 __be16 product_id; 131 }; 132 133 struct pgm_packet { 134 struct { 135 u8 unused[3]; 136 u8 len; 137 __be32 addr; 138 } header; 139 __be32 payload[HIDEEP_NVM_PAGE_SIZE / sizeof(__be32)]; 140 }; 141 142 #define HIDEEP_XFER_BUF_SIZE sizeof(struct pgm_packet) 143 144 struct hideep_ts { 145 struct i2c_client *client; 146 struct input_dev *input_dev; 147 struct regmap *reg; 148 149 struct touchscreen_properties prop; 150 151 struct gpio_desc *reset_gpio; 152 153 struct regulator *vcc_vdd; 154 struct regulator *vcc_vid; 155 156 struct mutex dev_mutex; 157 158 u32 tch_count; 159 u32 lpm_count; 160 161 /* 162 * Data buffer to read packet from the device (contacts and key 163 * states). We align it on double-word boundary to keep word-sized 164 * fields in contact data and double-word-sized fields in program 165 * packet aligned. 166 */ 167 u8 xfer_buf[HIDEEP_XFER_BUF_SIZE] __aligned(4); 168 169 int key_num; 170 u32 key_codes[HIDEEP_KEY_MAX]; 171 172 struct dwz_info dwz_info; 173 174 unsigned int fw_size; 175 u32 nvm_mask; 176 }; 177 178 static int hideep_pgm_w_mem(struct hideep_ts *ts, u32 addr, 179 const __be32 *data, size_t count) 180 { 181 struct pgm_packet *packet = (void *)ts->xfer_buf; 182 size_t len = count * sizeof(*data); 183 struct i2c_msg msg = { 184 .addr = ts->client->addr, 185 .len = len + sizeof(packet->header.len) + 186 sizeof(packet->header.addr), 187 .buf = &packet->header.len, 188 }; 189 int ret; 190 191 if (len > HIDEEP_NVM_PAGE_SIZE) 192 return -EINVAL; 193 194 packet->header.len = 0x80 | (count - 1); 195 packet->header.addr = cpu_to_be32(addr); 196 memcpy(packet->payload, data, len); 197 198 ret = i2c_transfer(ts->client->adapter, &msg, 1); 199 if (ret != 1) 200 return ret < 0 ? ret : -EIO; 201 202 return 0; 203 } 204 205 static int hideep_pgm_r_mem(struct hideep_ts *ts, u32 addr, 206 __be32 *data, size_t count) 207 { 208 struct pgm_packet *packet = (void *)ts->xfer_buf; 209 size_t len = count * sizeof(*data); 210 struct i2c_msg msg[] = { 211 { 212 .addr = ts->client->addr, 213 .len = sizeof(packet->header.len) + 214 sizeof(packet->header.addr), 215 .buf = &packet->header.len, 216 }, 217 { 218 .addr = ts->client->addr, 219 .flags = I2C_M_RD, 220 .len = len, 221 .buf = (u8 *)data, 222 }, 223 }; 224 int ret; 225 226 if (len > HIDEEP_NVM_PAGE_SIZE) 227 return -EINVAL; 228 229 packet->header.len = count - 1; 230 packet->header.addr = cpu_to_be32(addr); 231 232 ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); 233 if (ret != ARRAY_SIZE(msg)) 234 return ret < 0 ? ret : -EIO; 235 236 return 0; 237 } 238 239 static int hideep_pgm_r_reg(struct hideep_ts *ts, u32 addr, u32 *val) 240 { 241 __be32 data; 242 int error; 243 244 error = hideep_pgm_r_mem(ts, addr, &data, 1); 245 if (error) { 246 dev_err(&ts->client->dev, 247 "read of register %#08x failed: %d\n", 248 addr, error); 249 return error; 250 } 251 252 *val = be32_to_cpu(data); 253 return 0; 254 } 255 256 static int hideep_pgm_w_reg(struct hideep_ts *ts, u32 addr, u32 val) 257 { 258 __be32 data = cpu_to_be32(val); 259 int error; 260 261 error = hideep_pgm_w_mem(ts, addr, &data, 1); 262 if (error) { 263 dev_err(&ts->client->dev, 264 "write to register %#08x (%#08x) failed: %d\n", 265 addr, val, error); 266 return error; 267 } 268 269 return 0; 270 } 271 272 #define SW_RESET_IN_PGM(clk) \ 273 { \ 274 hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CNT, (clk)); \ 275 hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CON, 0x03); \ 276 hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CON, 0x01); \ 277 } 278 279 #define SET_FLASH_PIO(ce) \ 280 hideep_pgm_w_reg(ts, HIDEEP_FLASH_CON, \ 281 0x01 | ((ce) << 1)) 282 283 #define SET_PIO_SIG(x, y) \ 284 hideep_pgm_w_reg(ts, HIDEEP_FLASH_PIO_SIG + (x), (y)) 285 286 #define SET_FLASH_HWCONTROL() \ 287 hideep_pgm_w_reg(ts, HIDEEP_FLASH_CON, 0x00) 288 289 #define NVM_W_SFR(x, y) \ 290 { \ 291 SET_FLASH_PIO(1); \ 292 SET_PIO_SIG(x, y); \ 293 SET_FLASH_PIO(0); \ 294 } 295 296 static void hideep_pgm_set(struct hideep_ts *ts) 297 { 298 hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CON, 0x00); 299 hideep_pgm_w_reg(ts, HIDEEP_SYSCON_SPC_CON, 0x00); 300 hideep_pgm_w_reg(ts, HIDEEP_SYSCON_CLK_ENA, 0xFF); 301 hideep_pgm_w_reg(ts, HIDEEP_SYSCON_CLK_CON, 0x01); 302 hideep_pgm_w_reg(ts, HIDEEP_SYSCON_PWR_CON, 0x01); 303 hideep_pgm_w_reg(ts, HIDEEP_FLASH_TIM, 0x03); 304 hideep_pgm_w_reg(ts, HIDEEP_FLASH_CACHE_CFG, 0x00); 305 } 306 307 static int hideep_pgm_get_pattern(struct hideep_ts *ts, u32 *pattern) 308 { 309 u16 p1 = 0xAF39; 310 u16 p2 = 0xDF9D; 311 int error; 312 313 error = regmap_bulk_write(ts->reg, p1, &p2, 1); 314 if (error) { 315 dev_err(&ts->client->dev, 316 "%s: regmap_bulk_write() failed with %d\n", 317 __func__, error); 318 return error; 319 } 320 321 usleep_range(1000, 1100); 322 323 /* flush invalid Tx load register */ 324 error = hideep_pgm_w_reg(ts, HIDEEP_ESI_TX_INVALID, 0x01); 325 if (error) 326 return error; 327 328 error = hideep_pgm_r_reg(ts, HIDEEP_SYSCON_PGM_ID, pattern); 329 if (error) 330 return error; 331 332 return 0; 333 } 334 335 static int hideep_enter_pgm(struct hideep_ts *ts) 336 { 337 int retry_count = 10; 338 u32 pattern; 339 int error; 340 341 while (retry_count--) { 342 error = hideep_pgm_get_pattern(ts, &pattern); 343 if (error) { 344 dev_err(&ts->client->dev, 345 "hideep_pgm_get_pattern failed: %d\n", error); 346 } else if (pattern != 0x39AF9DDF) { 347 dev_err(&ts->client->dev, "%s: bad pattern: %#08x\n", 348 __func__, pattern); 349 } else { 350 dev_dbg(&ts->client->dev, "found magic code"); 351 352 hideep_pgm_set(ts); 353 usleep_range(1000, 1100); 354 355 return 0; 356 } 357 } 358 359 dev_err(&ts->client->dev, "failed to enter pgm mode\n"); 360 SW_RESET_IN_PGM(1000); 361 return -EIO; 362 } 363 364 static int hideep_nvm_unlock(struct hideep_ts *ts) 365 { 366 u32 unmask_code; 367 int error; 368 369 hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_SFR_RPAGE); 370 error = hideep_pgm_r_reg(ts, 0x0000000C, &unmask_code); 371 hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_DEFAULT_PAGE); 372 if (error) 373 return error; 374 375 /* make it unprotected code */ 376 unmask_code &= ~HIDEEP_PROT_MODE; 377 378 /* compare unmask code */ 379 if (unmask_code != ts->nvm_mask) 380 dev_warn(&ts->client->dev, 381 "read mask code different %#08x vs %#08x", 382 unmask_code, ts->nvm_mask); 383 384 hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_SFR_WPAGE); 385 SET_FLASH_PIO(0); 386 387 NVM_W_SFR(HIDEEP_NVM_MASK_OFS, ts->nvm_mask); 388 SET_FLASH_HWCONTROL(); 389 hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_DEFAULT_PAGE); 390 391 return 0; 392 } 393 394 static int hideep_check_status(struct hideep_ts *ts) 395 { 396 int time_out = 100; 397 int status; 398 int error; 399 400 while (time_out--) { 401 error = hideep_pgm_r_reg(ts, HIDEEP_FLASH_STA, &status); 402 if (!error && status) 403 return 0; 404 405 usleep_range(1000, 1100); 406 } 407 408 return -ETIMEDOUT; 409 } 410 411 static int hideep_program_page(struct hideep_ts *ts, u32 addr, 412 const __be32 *ucode, size_t xfer_count) 413 { 414 u32 val; 415 int error; 416 417 error = hideep_check_status(ts); 418 if (error) 419 return -EBUSY; 420 421 addr &= ~(HIDEEP_NVM_PAGE_SIZE - 1); 422 423 SET_FLASH_PIO(0); 424 SET_FLASH_PIO(1); 425 426 /* erase page */ 427 SET_PIO_SIG(HIDEEP_PERASE | addr, 0xFFFFFFFF); 428 429 SET_FLASH_PIO(0); 430 431 error = hideep_check_status(ts); 432 if (error) 433 return -EBUSY; 434 435 /* write page */ 436 SET_FLASH_PIO(1); 437 438 val = be32_to_cpu(ucode[0]); 439 SET_PIO_SIG(HIDEEP_WRONLY | addr, val); 440 441 hideep_pgm_w_mem(ts, HIDEEP_FLASH_PIO_SIG | HIDEEP_WRONLY, 442 ucode, xfer_count); 443 444 val = be32_to_cpu(ucode[xfer_count - 1]); 445 SET_PIO_SIG(124, val); 446 447 SET_FLASH_PIO(0); 448 449 usleep_range(1000, 1100); 450 451 error = hideep_check_status(ts); 452 if (error) 453 return -EBUSY; 454 455 SET_FLASH_HWCONTROL(); 456 457 return 0; 458 } 459 460 static int hideep_program_nvm(struct hideep_ts *ts, 461 const __be32 *ucode, size_t ucode_len) 462 { 463 struct pgm_packet *packet_r = (void *)ts->xfer_buf; 464 __be32 *current_ucode = packet_r->payload; 465 size_t xfer_len; 466 size_t xfer_count; 467 u32 addr = 0; 468 int error; 469 470 error = hideep_nvm_unlock(ts); 471 if (error) 472 return error; 473 474 while (ucode_len > 0) { 475 xfer_len = min_t(size_t, ucode_len, HIDEEP_NVM_PAGE_SIZE); 476 xfer_count = xfer_len / sizeof(*ucode); 477 478 error = hideep_pgm_r_mem(ts, 0x00000000 + addr, 479 current_ucode, xfer_count); 480 if (error) { 481 dev_err(&ts->client->dev, 482 "%s: failed to read page at offset %#08x: %d\n", 483 __func__, addr, error); 484 return error; 485 } 486 487 /* See if the page needs updating */ 488 if (memcmp(ucode, current_ucode, xfer_len)) { 489 error = hideep_program_page(ts, addr, 490 ucode, xfer_count); 491 if (error) { 492 dev_err(&ts->client->dev, 493 "%s: iwrite failure @%#08x: %d\n", 494 __func__, addr, error); 495 return error; 496 } 497 498 usleep_range(1000, 1100); 499 } 500 501 ucode += xfer_count; 502 addr += xfer_len; 503 ucode_len -= xfer_len; 504 } 505 506 return 0; 507 } 508 509 static int hideep_verify_nvm(struct hideep_ts *ts, 510 const __be32 *ucode, size_t ucode_len) 511 { 512 struct pgm_packet *packet_r = (void *)ts->xfer_buf; 513 __be32 *current_ucode = packet_r->payload; 514 size_t xfer_len; 515 size_t xfer_count; 516 u32 addr = 0; 517 int i; 518 int error; 519 520 while (ucode_len > 0) { 521 xfer_len = min_t(size_t, ucode_len, HIDEEP_NVM_PAGE_SIZE); 522 xfer_count = xfer_len / sizeof(*ucode); 523 524 error = hideep_pgm_r_mem(ts, 0x00000000 + addr, 525 current_ucode, xfer_count); 526 if (error) { 527 dev_err(&ts->client->dev, 528 "%s: failed to read page at offset %#08x: %d\n", 529 __func__, addr, error); 530 return error; 531 } 532 533 if (memcmp(ucode, current_ucode, xfer_len)) { 534 const u8 *ucode_bytes = (const u8 *)ucode; 535 const u8 *current_bytes = (const u8 *)current_ucode; 536 537 for (i = 0; i < xfer_len; i++) 538 if (ucode_bytes[i] != current_bytes[i]) 539 dev_err(&ts->client->dev, 540 "%s: mismatch @%#08x: (%#02x vs %#02x)\n", 541 __func__, addr + i, 542 ucode_bytes[i], 543 current_bytes[i]); 544 545 return -EIO; 546 } 547 548 ucode += xfer_count; 549 addr += xfer_len; 550 ucode_len -= xfer_len; 551 } 552 553 return 0; 554 } 555 556 static int hideep_load_dwz(struct hideep_ts *ts) 557 { 558 u16 product_code; 559 int error; 560 561 error = hideep_enter_pgm(ts); 562 if (error) 563 return error; 564 565 msleep(50); 566 567 error = hideep_pgm_r_mem(ts, HIDEEP_DWZ_INFO, 568 (void *)&ts->dwz_info, 569 sizeof(ts->dwz_info) / sizeof(__be32)); 570 571 SW_RESET_IN_PGM(10); 572 msleep(50); 573 574 if (error) { 575 dev_err(&ts->client->dev, 576 "failed to fetch DWZ data: %d\n", error); 577 return error; 578 } 579 580 product_code = be16_to_cpu(ts->dwz_info.product_code); 581 582 switch (product_code & 0xF0) { 583 case 0x40: 584 dev_dbg(&ts->client->dev, "used crimson IC"); 585 ts->fw_size = 1024 * 48; 586 ts->nvm_mask = 0x00310000; 587 break; 588 case 0x60: 589 dev_dbg(&ts->client->dev, "used lime IC"); 590 ts->fw_size = 1024 * 64; 591 ts->nvm_mask = 0x0030027B; 592 break; 593 default: 594 dev_err(&ts->client->dev, "product code is wrong: %#04x", 595 product_code); 596 return -EINVAL; 597 } 598 599 dev_dbg(&ts->client->dev, "firmware release version: %#04x", 600 be16_to_cpu(ts->dwz_info.release_ver)); 601 602 return 0; 603 } 604 605 static int hideep_flash_firmware(struct hideep_ts *ts, 606 const __be32 *ucode, size_t ucode_len) 607 { 608 int retry_cnt = 3; 609 int error; 610 611 while (retry_cnt--) { 612 error = hideep_program_nvm(ts, ucode, ucode_len); 613 if (!error) { 614 error = hideep_verify_nvm(ts, ucode, ucode_len); 615 if (!error) 616 return 0; 617 } 618 } 619 620 return error; 621 } 622 623 static int hideep_update_firmware(struct hideep_ts *ts, 624 const __be32 *ucode, size_t ucode_len) 625 { 626 int error, error2; 627 628 dev_dbg(&ts->client->dev, "starting firmware update"); 629 630 /* enter program mode */ 631 error = hideep_enter_pgm(ts); 632 if (error) 633 return error; 634 635 error = hideep_flash_firmware(ts, ucode, ucode_len); 636 if (error) 637 dev_err(&ts->client->dev, 638 "firmware update failed: %d\n", error); 639 else 640 dev_dbg(&ts->client->dev, "firmware updated successfully\n"); 641 642 SW_RESET_IN_PGM(1000); 643 644 error2 = hideep_load_dwz(ts); 645 if (error2) 646 dev_err(&ts->client->dev, 647 "failed to load dwz after firmware update: %d\n", 648 error2); 649 650 return error ?: error2; 651 } 652 653 static int hideep_power_on(struct hideep_ts *ts) 654 { 655 int error = 0; 656 657 error = regulator_enable(ts->vcc_vdd); 658 if (error) 659 dev_err(&ts->client->dev, 660 "failed to enable 'vdd' regulator: %d", error); 661 662 usleep_range(999, 1000); 663 664 error = regulator_enable(ts->vcc_vid); 665 if (error) 666 dev_err(&ts->client->dev, 667 "failed to enable 'vcc_vid' regulator: %d", 668 error); 669 670 msleep(30); 671 672 if (ts->reset_gpio) { 673 gpiod_set_value_cansleep(ts->reset_gpio, 0); 674 } else { 675 error = regmap_write(ts->reg, HIDEEP_RESET_CMD, 0x01); 676 if (error) 677 dev_err(&ts->client->dev, 678 "failed to send 'reset' command: %d\n", error); 679 } 680 681 msleep(50); 682 683 return error; 684 } 685 686 static void hideep_power_off(void *data) 687 { 688 struct hideep_ts *ts = data; 689 690 if (ts->reset_gpio) 691 gpiod_set_value(ts->reset_gpio, 1); 692 693 regulator_disable(ts->vcc_vid); 694 regulator_disable(ts->vcc_vdd); 695 } 696 697 #define __GET_MT_TOOL_TYPE(type) ((type) == 0x01 ? MT_TOOL_FINGER : MT_TOOL_PEN) 698 699 static void hideep_report_slot(struct input_dev *input, 700 const struct hideep_event *event) 701 { 702 input_mt_slot(input, event->index & 0x0f); 703 input_mt_report_slot_state(input, 704 __GET_MT_TOOL_TYPE(event->type), 705 !(event->flag & HIDEEP_MT_RELEASED)); 706 if (!(event->flag & HIDEEP_MT_RELEASED)) { 707 input_report_abs(input, ABS_MT_POSITION_X, 708 le16_to_cpup(&event->x)); 709 input_report_abs(input, ABS_MT_POSITION_Y, 710 le16_to_cpup(&event->y)); 711 input_report_abs(input, ABS_MT_PRESSURE, 712 le16_to_cpup(&event->z)); 713 input_report_abs(input, ABS_MT_TOUCH_MAJOR, event->w); 714 } 715 } 716 717 static void hideep_parse_and_report(struct hideep_ts *ts) 718 { 719 const struct hideep_event *events = 720 (void *)&ts->xfer_buf[HIDEEP_TOUCH_EVENT_INDEX]; 721 const u8 *keys = &ts->xfer_buf[HIDEEP_KEY_EVENT_INDEX]; 722 int touch_count = ts->xfer_buf[0]; 723 int key_count = ts->xfer_buf[1] & 0x0f; 724 int lpm_count = ts->xfer_buf[1] & 0xf0; 725 int i; 726 727 /* get touch event count */ 728 dev_dbg(&ts->client->dev, "mt = %d, key = %d, lpm = %02x", 729 touch_count, key_count, lpm_count); 730 731 touch_count = min(touch_count, HIDEEP_MT_MAX); 732 for (i = 0; i < touch_count; i++) 733 hideep_report_slot(ts->input_dev, events + i); 734 735 key_count = min(key_count, HIDEEP_KEY_MAX); 736 for (i = 0; i < key_count; i++) { 737 u8 key_data = keys[i * 2]; 738 739 input_report_key(ts->input_dev, 740 ts->key_codes[key_data & HIDEEP_KEY_IDX_MASK], 741 key_data & HIDEEP_KEY_PRESSED_MASK); 742 } 743 744 input_mt_sync_frame(ts->input_dev); 745 input_sync(ts->input_dev); 746 } 747 748 static irqreturn_t hideep_irq(int irq, void *handle) 749 { 750 struct hideep_ts *ts = handle; 751 int error; 752 753 BUILD_BUG_ON(HIDEEP_MAX_EVENT > HIDEEP_XFER_BUF_SIZE); 754 755 error = regmap_bulk_read(ts->reg, HIDEEP_EVENT_ADDR, 756 ts->xfer_buf, HIDEEP_MAX_EVENT / 2); 757 if (error) { 758 dev_err(&ts->client->dev, "failed to read events: %d\n", error); 759 goto out; 760 } 761 762 hideep_parse_and_report(ts); 763 764 out: 765 return IRQ_HANDLED; 766 } 767 768 static int hideep_get_axis_info(struct hideep_ts *ts) 769 { 770 __le16 val[2]; 771 int error; 772 773 error = regmap_bulk_read(ts->reg, 0x28, val, ARRAY_SIZE(val)); 774 if (error) 775 return error; 776 777 ts->prop.max_x = le16_to_cpup(val); 778 ts->prop.max_y = le16_to_cpup(val + 1); 779 780 dev_dbg(&ts->client->dev, "X: %d, Y: %d", 781 ts->prop.max_x, ts->prop.max_y); 782 783 return 0; 784 } 785 786 static int hideep_init_input(struct hideep_ts *ts) 787 { 788 struct device *dev = &ts->client->dev; 789 int i; 790 int error; 791 792 ts->input_dev = devm_input_allocate_device(dev); 793 if (!ts->input_dev) { 794 dev_err(dev, "failed to allocate input device\n"); 795 return -ENOMEM; 796 } 797 798 ts->input_dev->name = HIDEEP_TS_NAME; 799 ts->input_dev->id.bustype = BUS_I2C; 800 input_set_drvdata(ts->input_dev, ts); 801 802 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 803 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 804 input_set_abs_params(ts->input_dev, ABS_MT_PRESSURE, 0, 65535, 0, 0); 805 input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 806 input_set_abs_params(ts->input_dev, ABS_MT_TOOL_TYPE, 807 0, MT_TOOL_MAX, 0, 0); 808 touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 809 810 if (ts->prop.max_x == 0 || ts->prop.max_y == 0) { 811 error = hideep_get_axis_info(ts); 812 if (error) 813 return error; 814 } 815 816 error = input_mt_init_slots(ts->input_dev, HIDEEP_MT_MAX, 817 INPUT_MT_DIRECT); 818 if (error) 819 return error; 820 821 ts->key_num = device_property_count_u32(dev, "linux,keycodes"); 822 if (ts->key_num > HIDEEP_KEY_MAX) { 823 dev_err(dev, "too many keys defined: %d\n", 824 ts->key_num); 825 return -EINVAL; 826 } 827 828 if (ts->key_num <= 0) { 829 dev_dbg(dev, 830 "missing or malformed 'linux,keycodes' property\n"); 831 } else { 832 error = device_property_read_u32_array(dev, "linux,keycodes", 833 ts->key_codes, 834 ts->key_num); 835 if (error) { 836 dev_dbg(dev, "failed to read keymap: %d", error); 837 return error; 838 } 839 840 if (ts->key_num) { 841 ts->input_dev->keycode = ts->key_codes; 842 ts->input_dev->keycodesize = sizeof(ts->key_codes[0]); 843 ts->input_dev->keycodemax = ts->key_num; 844 845 for (i = 0; i < ts->key_num; i++) 846 input_set_capability(ts->input_dev, EV_KEY, 847 ts->key_codes[i]); 848 } 849 } 850 851 error = input_register_device(ts->input_dev); 852 if (error) { 853 dev_err(dev, "failed to register input device: %d", error); 854 return error; 855 } 856 857 return 0; 858 } 859 860 static ssize_t hideep_update_fw(struct device *dev, 861 struct device_attribute *attr, 862 const char *buf, size_t count) 863 { 864 struct i2c_client *client = to_i2c_client(dev); 865 struct hideep_ts *ts = i2c_get_clientdata(client); 866 const struct firmware *fw_entry; 867 char *fw_name; 868 int mode; 869 int error; 870 871 error = kstrtoint(buf, 0, &mode); 872 if (error) 873 return error; 874 875 fw_name = kasprintf(GFP_KERNEL, "hideep_ts_%04x.bin", 876 be16_to_cpu(ts->dwz_info.product_id)); 877 if (!fw_name) 878 return -ENOMEM; 879 880 error = request_firmware(&fw_entry, fw_name, dev); 881 if (error) { 882 dev_err(dev, "failed to request firmware %s: %d", 883 fw_name, error); 884 goto out_free_fw_name; 885 } 886 887 if (fw_entry->size % sizeof(__be32)) { 888 dev_err(dev, "invalid firmware size %zu\n", fw_entry->size); 889 error = -EINVAL; 890 goto out_release_fw; 891 } 892 893 if (fw_entry->size > ts->fw_size) { 894 dev_err(dev, "fw size (%zu) is too big (memory size %d)\n", 895 fw_entry->size, ts->fw_size); 896 error = -EFBIG; 897 goto out_release_fw; 898 } 899 900 mutex_lock(&ts->dev_mutex); 901 disable_irq(client->irq); 902 903 error = hideep_update_firmware(ts, (const __be32 *)fw_entry->data, 904 fw_entry->size); 905 906 enable_irq(client->irq); 907 mutex_unlock(&ts->dev_mutex); 908 909 out_release_fw: 910 release_firmware(fw_entry); 911 out_free_fw_name: 912 kfree(fw_name); 913 914 return error ?: count; 915 } 916 917 static ssize_t hideep_fw_version_show(struct device *dev, 918 struct device_attribute *attr, char *buf) 919 { 920 struct i2c_client *client = to_i2c_client(dev); 921 struct hideep_ts *ts = i2c_get_clientdata(client); 922 ssize_t len; 923 924 mutex_lock(&ts->dev_mutex); 925 len = scnprintf(buf, PAGE_SIZE, "%04x\n", 926 be16_to_cpu(ts->dwz_info.release_ver)); 927 mutex_unlock(&ts->dev_mutex); 928 929 return len; 930 } 931 932 static ssize_t hideep_product_id_show(struct device *dev, 933 struct device_attribute *attr, char *buf) 934 { 935 struct i2c_client *client = to_i2c_client(dev); 936 struct hideep_ts *ts = i2c_get_clientdata(client); 937 ssize_t len; 938 939 mutex_lock(&ts->dev_mutex); 940 len = scnprintf(buf, PAGE_SIZE, "%04x\n", 941 be16_to_cpu(ts->dwz_info.product_id)); 942 mutex_unlock(&ts->dev_mutex); 943 944 return len; 945 } 946 947 static DEVICE_ATTR(version, 0664, hideep_fw_version_show, NULL); 948 static DEVICE_ATTR(product_id, 0664, hideep_product_id_show, NULL); 949 static DEVICE_ATTR(update_fw, 0664, NULL, hideep_update_fw); 950 951 static struct attribute *hideep_ts_sysfs_entries[] = { 952 &dev_attr_version.attr, 953 &dev_attr_product_id.attr, 954 &dev_attr_update_fw.attr, 955 NULL, 956 }; 957 958 static const struct attribute_group hideep_ts_attr_group = { 959 .attrs = hideep_ts_sysfs_entries, 960 }; 961 962 static int __maybe_unused hideep_suspend(struct device *dev) 963 { 964 struct i2c_client *client = to_i2c_client(dev); 965 struct hideep_ts *ts = i2c_get_clientdata(client); 966 967 disable_irq(client->irq); 968 hideep_power_off(ts); 969 970 return 0; 971 } 972 973 static int __maybe_unused hideep_resume(struct device *dev) 974 { 975 struct i2c_client *client = to_i2c_client(dev); 976 struct hideep_ts *ts = i2c_get_clientdata(client); 977 int error; 978 979 error = hideep_power_on(ts); 980 if (error) { 981 dev_err(&client->dev, "power on failed"); 982 return error; 983 } 984 985 enable_irq(client->irq); 986 987 return 0; 988 } 989 990 static SIMPLE_DEV_PM_OPS(hideep_pm_ops, hideep_suspend, hideep_resume); 991 992 static const struct regmap_config hideep_regmap_config = { 993 .reg_bits = 16, 994 .reg_format_endian = REGMAP_ENDIAN_LITTLE, 995 .val_bits = 16, 996 .val_format_endian = REGMAP_ENDIAN_LITTLE, 997 .max_register = 0xffff, 998 }; 999 1000 static int hideep_probe(struct i2c_client *client) 1001 { 1002 struct hideep_ts *ts; 1003 int error; 1004 1005 /* check i2c bus */ 1006 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1007 dev_err(&client->dev, "check i2c device error"); 1008 return -ENODEV; 1009 } 1010 1011 if (client->irq <= 0) { 1012 dev_err(&client->dev, "missing irq: %d\n", client->irq); 1013 return -EINVAL; 1014 } 1015 1016 ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1017 if (!ts) 1018 return -ENOMEM; 1019 1020 ts->client = client; 1021 i2c_set_clientdata(client, ts); 1022 mutex_init(&ts->dev_mutex); 1023 1024 ts->reg = devm_regmap_init_i2c(client, &hideep_regmap_config); 1025 if (IS_ERR(ts->reg)) { 1026 error = PTR_ERR(ts->reg); 1027 dev_err(&client->dev, 1028 "failed to initialize regmap: %d\n", error); 1029 return error; 1030 } 1031 1032 ts->vcc_vdd = devm_regulator_get(&client->dev, "vdd"); 1033 if (IS_ERR(ts->vcc_vdd)) 1034 return PTR_ERR(ts->vcc_vdd); 1035 1036 ts->vcc_vid = devm_regulator_get(&client->dev, "vid"); 1037 if (IS_ERR(ts->vcc_vid)) 1038 return PTR_ERR(ts->vcc_vid); 1039 1040 ts->reset_gpio = devm_gpiod_get_optional(&client->dev, 1041 "reset", GPIOD_OUT_HIGH); 1042 if (IS_ERR(ts->reset_gpio)) 1043 return PTR_ERR(ts->reset_gpio); 1044 1045 error = hideep_power_on(ts); 1046 if (error) { 1047 dev_err(&client->dev, "power on failed: %d\n", error); 1048 return error; 1049 } 1050 1051 error = devm_add_action_or_reset(&client->dev, hideep_power_off, ts); 1052 if (error) 1053 return error; 1054 1055 error = hideep_load_dwz(ts); 1056 if (error) { 1057 dev_err(&client->dev, "failed to load dwz: %d", error); 1058 return error; 1059 } 1060 1061 error = hideep_init_input(ts); 1062 if (error) 1063 return error; 1064 1065 error = devm_request_threaded_irq(&client->dev, client->irq, 1066 NULL, hideep_irq, IRQF_ONESHOT, 1067 client->name, ts); 1068 if (error) { 1069 dev_err(&client->dev, "failed to request irq %d: %d\n", 1070 client->irq, error); 1071 return error; 1072 } 1073 1074 error = devm_device_add_group(&client->dev, &hideep_ts_attr_group); 1075 if (error) { 1076 dev_err(&client->dev, 1077 "failed to add sysfs attributes: %d\n", error); 1078 return error; 1079 } 1080 1081 return 0; 1082 } 1083 1084 static const struct i2c_device_id hideep_i2c_id[] = { 1085 { HIDEEP_I2C_NAME, 0 }, 1086 { } 1087 }; 1088 MODULE_DEVICE_TABLE(i2c, hideep_i2c_id); 1089 1090 #ifdef CONFIG_ACPI 1091 static const struct acpi_device_id hideep_acpi_id[] = { 1092 { "HIDP0001", 0 }, 1093 { } 1094 }; 1095 MODULE_DEVICE_TABLE(acpi, hideep_acpi_id); 1096 #endif 1097 1098 #ifdef CONFIG_OF 1099 static const struct of_device_id hideep_match_table[] = { 1100 { .compatible = "hideep,hideep-ts" }, 1101 { } 1102 }; 1103 MODULE_DEVICE_TABLE(of, hideep_match_table); 1104 #endif 1105 1106 static struct i2c_driver hideep_driver = { 1107 .driver = { 1108 .name = HIDEEP_I2C_NAME, 1109 .of_match_table = of_match_ptr(hideep_match_table), 1110 .acpi_match_table = ACPI_PTR(hideep_acpi_id), 1111 .pm = &hideep_pm_ops, 1112 }, 1113 .id_table = hideep_i2c_id, 1114 .probe_new = hideep_probe, 1115 }; 1116 1117 module_i2c_driver(hideep_driver); 1118 1119 MODULE_DESCRIPTION("Driver for HiDeep Touchscreen Controller"); 1120 MODULE_AUTHOR("anthony.kim@hideep.com"); 1121 MODULE_LICENSE("GPL v2"); 1122