1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2007-2016, Synaptics Incorporated 4 * Copyright (C) 2016 Zodiac Inflight Innovations 5 */ 6 7 #include <linux/kernel.h> 8 #include <linux/rmi.h> 9 #include <linux/firmware.h> 10 #include <asm/unaligned.h> 11 #include <linux/bitops.h> 12 13 #include "rmi_driver.h" 14 #include "rmi_f34.h" 15 16 static int rmi_f34_write_bootloader_id(struct f34_data *f34) 17 { 18 struct rmi_function *fn = f34->fn; 19 struct rmi_device *rmi_dev = fn->rmi_dev; 20 u8 bootloader_id[F34_BOOTLOADER_ID_LEN]; 21 int ret; 22 23 ret = rmi_read_block(rmi_dev, fn->fd.query_base_addr, 24 bootloader_id, sizeof(bootloader_id)); 25 if (ret) { 26 dev_err(&fn->dev, "%s: Reading bootloader ID failed: %d\n", 27 __func__, ret); 28 return ret; 29 } 30 31 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: writing bootloader id '%c%c'\n", 32 __func__, bootloader_id[0], bootloader_id[1]); 33 34 ret = rmi_write_block(rmi_dev, 35 fn->fd.data_base_addr + F34_BLOCK_DATA_OFFSET, 36 bootloader_id, sizeof(bootloader_id)); 37 if (ret) { 38 dev_err(&fn->dev, "Failed to write bootloader ID: %d\n", ret); 39 return ret; 40 } 41 42 return 0; 43 } 44 45 static int rmi_f34_command(struct f34_data *f34, u8 command, 46 unsigned int timeout, bool write_bl_id) 47 { 48 struct rmi_function *fn = f34->fn; 49 struct rmi_device *rmi_dev = fn->rmi_dev; 50 int ret; 51 52 if (write_bl_id) { 53 ret = rmi_f34_write_bootloader_id(f34); 54 if (ret) 55 return ret; 56 } 57 58 init_completion(&f34->v5.cmd_done); 59 60 ret = rmi_read(rmi_dev, f34->v5.ctrl_address, &f34->v5.status); 61 if (ret) { 62 dev_err(&f34->fn->dev, 63 "%s: Failed to read cmd register: %d (command %#02x)\n", 64 __func__, ret, command); 65 return ret; 66 } 67 68 f34->v5.status |= command & 0x0f; 69 70 ret = rmi_write(rmi_dev, f34->v5.ctrl_address, f34->v5.status); 71 if (ret < 0) { 72 dev_err(&f34->fn->dev, 73 "Failed to write F34 command %#02x: %d\n", 74 command, ret); 75 return ret; 76 } 77 78 if (!wait_for_completion_timeout(&f34->v5.cmd_done, 79 msecs_to_jiffies(timeout))) { 80 81 ret = rmi_read(rmi_dev, f34->v5.ctrl_address, &f34->v5.status); 82 if (ret) { 83 dev_err(&f34->fn->dev, 84 "%s: cmd %#02x timed out: %d\n", 85 __func__, command, ret); 86 return ret; 87 } 88 89 if (f34->v5.status & 0x7f) { 90 dev_err(&f34->fn->dev, 91 "%s: cmd %#02x timed out, status: %#02x\n", 92 __func__, command, f34->v5.status); 93 return -ETIMEDOUT; 94 } 95 } 96 97 return 0; 98 } 99 100 static irqreturn_t rmi_f34_attention(int irq, void *ctx) 101 { 102 struct rmi_function *fn = ctx; 103 struct f34_data *f34 = dev_get_drvdata(&fn->dev); 104 int ret; 105 u8 status; 106 107 if (f34->bl_version == 5) { 108 ret = rmi_read(f34->fn->rmi_dev, f34->v5.ctrl_address, 109 &status); 110 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: status: %#02x, ret: %d\n", 111 __func__, status, ret); 112 113 if (!ret && !(status & 0x7f)) 114 complete(&f34->v5.cmd_done); 115 } else { 116 ret = rmi_read_block(f34->fn->rmi_dev, 117 f34->fn->fd.data_base_addr + 118 f34->v7.off.flash_status, 119 &status, sizeof(status)); 120 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: status: %#02x, ret: %d\n", 121 __func__, status, ret); 122 123 if (!ret && !(status & 0x1f)) 124 complete(&f34->v7.cmd_done); 125 } 126 127 return IRQ_HANDLED; 128 } 129 130 static int rmi_f34_write_blocks(struct f34_data *f34, const void *data, 131 int block_count, u8 command) 132 { 133 struct rmi_function *fn = f34->fn; 134 struct rmi_device *rmi_dev = fn->rmi_dev; 135 u16 address = fn->fd.data_base_addr + F34_BLOCK_DATA_OFFSET; 136 u8 start_address[] = { 0, 0 }; 137 int i; 138 int ret; 139 140 ret = rmi_write_block(rmi_dev, fn->fd.data_base_addr, 141 start_address, sizeof(start_address)); 142 if (ret) { 143 dev_err(&fn->dev, "Failed to write initial zeros: %d\n", ret); 144 return ret; 145 } 146 147 for (i = 0; i < block_count; i++) { 148 ret = rmi_write_block(rmi_dev, address, 149 data, f34->v5.block_size); 150 if (ret) { 151 dev_err(&fn->dev, 152 "failed to write block #%d: %d\n", i, ret); 153 return ret; 154 } 155 156 ret = rmi_f34_command(f34, command, F34_IDLE_WAIT_MS, false); 157 if (ret) { 158 dev_err(&fn->dev, 159 "Failed to write command for block #%d: %d\n", 160 i, ret); 161 return ret; 162 } 163 164 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "wrote block %d of %d\n", 165 i + 1, block_count); 166 167 data += f34->v5.block_size; 168 f34->update_progress += f34->v5.block_size; 169 f34->update_status = (f34->update_progress * 100) / 170 f34->update_size; 171 } 172 173 return 0; 174 } 175 176 static int rmi_f34_write_firmware(struct f34_data *f34, const void *data) 177 { 178 return rmi_f34_write_blocks(f34, data, f34->v5.fw_blocks, 179 F34_WRITE_FW_BLOCK); 180 } 181 182 static int rmi_f34_write_config(struct f34_data *f34, const void *data) 183 { 184 return rmi_f34_write_blocks(f34, data, f34->v5.config_blocks, 185 F34_WRITE_CONFIG_BLOCK); 186 } 187 188 static int rmi_f34_enable_flash(struct f34_data *f34) 189 { 190 return rmi_f34_command(f34, F34_ENABLE_FLASH_PROG, 191 F34_ENABLE_WAIT_MS, true); 192 } 193 194 static int rmi_f34_flash_firmware(struct f34_data *f34, 195 const struct rmi_f34_firmware *syn_fw) 196 { 197 struct rmi_function *fn = f34->fn; 198 u32 image_size = le32_to_cpu(syn_fw->image_size); 199 u32 config_size = le32_to_cpu(syn_fw->config_size); 200 int ret; 201 202 f34->update_progress = 0; 203 f34->update_size = image_size + config_size; 204 205 if (image_size) { 206 dev_info(&fn->dev, "Erasing firmware...\n"); 207 ret = rmi_f34_command(f34, F34_ERASE_ALL, 208 F34_ERASE_WAIT_MS, true); 209 if (ret) 210 return ret; 211 212 dev_info(&fn->dev, "Writing firmware (%d bytes)...\n", 213 image_size); 214 ret = rmi_f34_write_firmware(f34, syn_fw->data); 215 if (ret) 216 return ret; 217 } 218 219 if (config_size) { 220 /* 221 * We only need to erase config if we haven't updated 222 * firmware. 223 */ 224 if (!image_size) { 225 dev_info(&fn->dev, "Erasing config...\n"); 226 ret = rmi_f34_command(f34, F34_ERASE_CONFIG, 227 F34_ERASE_WAIT_MS, true); 228 if (ret) 229 return ret; 230 } 231 232 dev_info(&fn->dev, "Writing config (%d bytes)...\n", 233 config_size); 234 ret = rmi_f34_write_config(f34, &syn_fw->data[image_size]); 235 if (ret) 236 return ret; 237 } 238 239 return 0; 240 } 241 242 static int rmi_f34_update_firmware(struct f34_data *f34, 243 const struct firmware *fw) 244 { 245 const struct rmi_f34_firmware *syn_fw = 246 (const struct rmi_f34_firmware *)fw->data; 247 u32 image_size = le32_to_cpu(syn_fw->image_size); 248 u32 config_size = le32_to_cpu(syn_fw->config_size); 249 int ret; 250 251 BUILD_BUG_ON(offsetof(struct rmi_f34_firmware, data) != 252 F34_FW_IMAGE_OFFSET); 253 254 rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev, 255 "FW size:%zd, checksum:%08x, image_size:%d, config_size:%d\n", 256 fw->size, 257 le32_to_cpu(syn_fw->checksum), 258 image_size, config_size); 259 260 rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev, 261 "FW bootloader_id:%02x, product_id:%.*s, info: %02x%02x\n", 262 syn_fw->bootloader_version, 263 (int)sizeof(syn_fw->product_id), syn_fw->product_id, 264 syn_fw->product_info[0], syn_fw->product_info[1]); 265 266 if (image_size && image_size != f34->v5.fw_blocks * f34->v5.block_size) { 267 dev_err(&f34->fn->dev, 268 "Bad firmware image: fw size %d, expected %d\n", 269 image_size, f34->v5.fw_blocks * f34->v5.block_size); 270 ret = -EILSEQ; 271 goto out; 272 } 273 274 if (config_size && 275 config_size != f34->v5.config_blocks * f34->v5.block_size) { 276 dev_err(&f34->fn->dev, 277 "Bad firmware image: config size %d, expected %d\n", 278 config_size, 279 f34->v5.config_blocks * f34->v5.block_size); 280 ret = -EILSEQ; 281 goto out; 282 } 283 284 if (image_size && !config_size) { 285 dev_err(&f34->fn->dev, "Bad firmware image: no config data\n"); 286 ret = -EILSEQ; 287 goto out; 288 } 289 290 dev_info(&f34->fn->dev, "Firmware image OK\n"); 291 mutex_lock(&f34->v5.flash_mutex); 292 293 ret = rmi_f34_flash_firmware(f34, syn_fw); 294 295 mutex_unlock(&f34->v5.flash_mutex); 296 297 out: 298 return ret; 299 } 300 301 static int rmi_f34_status(struct rmi_function *fn) 302 { 303 struct f34_data *f34 = dev_get_drvdata(&fn->dev); 304 305 /* 306 * The status is the percentage complete, or once complete, 307 * zero for success or a negative return code. 308 */ 309 return f34->update_status; 310 } 311 312 static ssize_t rmi_driver_bootloader_id_show(struct device *dev, 313 struct device_attribute *dattr, 314 char *buf) 315 { 316 struct rmi_driver_data *data = dev_get_drvdata(dev); 317 struct rmi_function *fn = data->f34_container; 318 struct f34_data *f34; 319 320 if (fn) { 321 f34 = dev_get_drvdata(&fn->dev); 322 323 if (f34->bl_version == 5) 324 return scnprintf(buf, PAGE_SIZE, "%c%c\n", 325 f34->bootloader_id[0], 326 f34->bootloader_id[1]); 327 else 328 return scnprintf(buf, PAGE_SIZE, "V%d.%d\n", 329 f34->bootloader_id[1], 330 f34->bootloader_id[0]); 331 } 332 333 return 0; 334 } 335 336 static DEVICE_ATTR(bootloader_id, 0444, rmi_driver_bootloader_id_show, NULL); 337 338 static ssize_t rmi_driver_configuration_id_show(struct device *dev, 339 struct device_attribute *dattr, 340 char *buf) 341 { 342 struct rmi_driver_data *data = dev_get_drvdata(dev); 343 struct rmi_function *fn = data->f34_container; 344 struct f34_data *f34; 345 346 if (fn) { 347 f34 = dev_get_drvdata(&fn->dev); 348 349 return scnprintf(buf, PAGE_SIZE, "%s\n", f34->configuration_id); 350 } 351 352 return 0; 353 } 354 355 static DEVICE_ATTR(configuration_id, 0444, 356 rmi_driver_configuration_id_show, NULL); 357 358 static int rmi_firmware_update(struct rmi_driver_data *data, 359 const struct firmware *fw) 360 { 361 struct rmi_device *rmi_dev = data->rmi_dev; 362 struct device *dev = &rmi_dev->dev; 363 struct f34_data *f34; 364 int ret; 365 366 if (!data->f34_container) { 367 dev_warn(dev, "%s: No F34 present!\n", __func__); 368 return -EINVAL; 369 } 370 371 f34 = dev_get_drvdata(&data->f34_container->dev); 372 373 if (f34->bl_version == 7) { 374 if (data->pdt_props & HAS_BSR) { 375 dev_err(dev, "%s: LTS not supported\n", __func__); 376 return -ENODEV; 377 } 378 } else if (f34->bl_version != 5) { 379 dev_warn(dev, "F34 V%d not supported!\n", 380 data->f34_container->fd.function_version); 381 return -ENODEV; 382 } 383 384 /* Enter flash mode */ 385 if (f34->bl_version == 7) 386 ret = rmi_f34v7_start_reflash(f34, fw); 387 else 388 ret = rmi_f34_enable_flash(f34); 389 if (ret) 390 return ret; 391 392 rmi_disable_irq(rmi_dev, false); 393 394 /* Tear down functions and re-probe */ 395 rmi_free_function_list(rmi_dev); 396 397 ret = rmi_probe_interrupts(data); 398 if (ret) 399 return ret; 400 401 ret = rmi_init_functions(data); 402 if (ret) 403 return ret; 404 405 if (!data->bootloader_mode || !data->f34_container) { 406 dev_warn(dev, "%s: No F34 present or not in bootloader!\n", 407 __func__); 408 return -EINVAL; 409 } 410 411 rmi_enable_irq(rmi_dev, false); 412 413 f34 = dev_get_drvdata(&data->f34_container->dev); 414 415 /* Perform firmware update */ 416 if (f34->bl_version == 7) 417 ret = rmi_f34v7_do_reflash(f34, fw); 418 else 419 ret = rmi_f34_update_firmware(f34, fw); 420 421 if (ret) { 422 f34->update_status = ret; 423 dev_err(&f34->fn->dev, 424 "Firmware update failed, status: %d\n", ret); 425 } else { 426 dev_info(&f34->fn->dev, "Firmware update complete\n"); 427 } 428 429 rmi_disable_irq(rmi_dev, false); 430 431 /* Re-probe */ 432 rmi_dbg(RMI_DEBUG_FN, dev, "Re-probing device\n"); 433 rmi_free_function_list(rmi_dev); 434 435 ret = rmi_scan_pdt(rmi_dev, NULL, rmi_initial_reset); 436 if (ret < 0) 437 dev_warn(dev, "RMI reset failed!\n"); 438 439 ret = rmi_probe_interrupts(data); 440 if (ret) 441 return ret; 442 443 ret = rmi_init_functions(data); 444 if (ret) 445 return ret; 446 447 rmi_enable_irq(rmi_dev, false); 448 449 if (data->f01_container->dev.driver) 450 /* Driver already bound, so enable ATTN now. */ 451 return rmi_enable_sensor(rmi_dev); 452 453 rmi_dbg(RMI_DEBUG_FN, dev, "%s complete\n", __func__); 454 455 return ret; 456 } 457 458 static ssize_t rmi_driver_update_fw_store(struct device *dev, 459 struct device_attribute *dattr, 460 const char *buf, size_t count) 461 { 462 struct rmi_driver_data *data = dev_get_drvdata(dev); 463 char fw_name[NAME_MAX]; 464 const struct firmware *fw; 465 size_t copy_count = count; 466 int ret; 467 468 if (count == 0 || count >= NAME_MAX) 469 return -EINVAL; 470 471 if (buf[count - 1] == '\0' || buf[count - 1] == '\n') 472 copy_count -= 1; 473 474 strncpy(fw_name, buf, copy_count); 475 fw_name[copy_count] = '\0'; 476 477 ret = request_firmware(&fw, fw_name, dev); 478 if (ret) 479 return ret; 480 481 dev_info(dev, "Flashing %s\n", fw_name); 482 483 ret = rmi_firmware_update(data, fw); 484 485 release_firmware(fw); 486 487 return ret ?: count; 488 } 489 490 static DEVICE_ATTR(update_fw, 0200, NULL, rmi_driver_update_fw_store); 491 492 static ssize_t rmi_driver_update_fw_status_show(struct device *dev, 493 struct device_attribute *dattr, 494 char *buf) 495 { 496 struct rmi_driver_data *data = dev_get_drvdata(dev); 497 int update_status = 0; 498 499 if (data->f34_container) 500 update_status = rmi_f34_status(data->f34_container); 501 502 return scnprintf(buf, PAGE_SIZE, "%d\n", update_status); 503 } 504 505 static DEVICE_ATTR(update_fw_status, 0444, 506 rmi_driver_update_fw_status_show, NULL); 507 508 static struct attribute *rmi_firmware_attrs[] = { 509 &dev_attr_bootloader_id.attr, 510 &dev_attr_configuration_id.attr, 511 &dev_attr_update_fw.attr, 512 &dev_attr_update_fw_status.attr, 513 NULL 514 }; 515 516 static const struct attribute_group rmi_firmware_attr_group = { 517 .attrs = rmi_firmware_attrs, 518 }; 519 520 static int rmi_f34_probe(struct rmi_function *fn) 521 { 522 struct f34_data *f34; 523 unsigned char f34_queries[9]; 524 bool has_config_id; 525 u8 version = fn->fd.function_version; 526 int ret; 527 528 f34 = devm_kzalloc(&fn->dev, sizeof(struct f34_data), GFP_KERNEL); 529 if (!f34) 530 return -ENOMEM; 531 532 f34->fn = fn; 533 dev_set_drvdata(&fn->dev, f34); 534 535 /* v5 code only supported version 0, try V7 probe */ 536 if (version > 0) 537 return rmi_f34v7_probe(f34); 538 539 f34->bl_version = 5; 540 541 ret = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr, 542 f34_queries, sizeof(f34_queries)); 543 if (ret) { 544 dev_err(&fn->dev, "%s: Failed to query properties\n", 545 __func__); 546 return ret; 547 } 548 549 snprintf(f34->bootloader_id, sizeof(f34->bootloader_id), 550 "%c%c", f34_queries[0], f34_queries[1]); 551 552 mutex_init(&f34->v5.flash_mutex); 553 init_completion(&f34->v5.cmd_done); 554 555 f34->v5.block_size = get_unaligned_le16(&f34_queries[3]); 556 f34->v5.fw_blocks = get_unaligned_le16(&f34_queries[5]); 557 f34->v5.config_blocks = get_unaligned_le16(&f34_queries[7]); 558 f34->v5.ctrl_address = fn->fd.data_base_addr + F34_BLOCK_DATA_OFFSET + 559 f34->v5.block_size; 560 has_config_id = f34_queries[2] & (1 << 2); 561 562 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Bootloader ID: %s\n", 563 f34->bootloader_id); 564 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Block size: %d\n", 565 f34->v5.block_size); 566 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "FW blocks: %d\n", 567 f34->v5.fw_blocks); 568 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "CFG blocks: %d\n", 569 f34->v5.config_blocks); 570 571 if (has_config_id) { 572 ret = rmi_read_block(fn->rmi_dev, fn->fd.control_base_addr, 573 f34_queries, sizeof(f34_queries)); 574 if (ret) { 575 dev_err(&fn->dev, "Failed to read F34 config ID\n"); 576 return ret; 577 } 578 579 snprintf(f34->configuration_id, sizeof(f34->configuration_id), 580 "%02x%02x%02x%02x", 581 f34_queries[0], f34_queries[1], 582 f34_queries[2], f34_queries[3]); 583 584 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Configuration ID: %s\n", 585 f34->configuration_id); 586 } 587 588 return 0; 589 } 590 591 int rmi_f34_create_sysfs(struct rmi_device *rmi_dev) 592 { 593 return sysfs_create_group(&rmi_dev->dev.kobj, &rmi_firmware_attr_group); 594 } 595 596 void rmi_f34_remove_sysfs(struct rmi_device *rmi_dev) 597 { 598 sysfs_remove_group(&rmi_dev->dev.kobj, &rmi_firmware_attr_group); 599 } 600 601 struct rmi_function_handler rmi_f34_handler = { 602 .driver = { 603 .name = "rmi4_f34", 604 }, 605 .func = 0x34, 606 .probe = rmi_f34_probe, 607 .attention = rmi_f34_attention, 608 }; 609