1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2018, The Linux Foundation. All rights reserved. 4 * Copyright (c) 2019-2020. Linaro Limited. 5 */ 6 7 #include <linux/firmware.h> 8 #include <linux/gpio/consumer.h> 9 #include <linux/i2c.h> 10 #include <linux/interrupt.h> 11 #include <linux/module.h> 12 #include <linux/mutex.h> 13 #include <linux/of_graph.h> 14 #include <linux/platform_device.h> 15 #include <linux/regmap.h> 16 #include <linux/regulator/consumer.h> 17 #include <linux/wait.h> 18 #include <linux/workqueue.h> 19 20 #include <sound/hdmi-codec.h> 21 22 #include <drm/drm_atomic_helper.h> 23 #include <drm/drm_bridge.h> 24 #include <drm/drm_edid.h> 25 #include <drm/drm_mipi_dsi.h> 26 #include <drm/drm_print.h> 27 #include <drm/drm_probe_helper.h> 28 29 #define EDID_BLOCK_SIZE 128 30 #define EDID_NUM_BLOCKS 2 31 32 #define FW_FILE "lt9611uxc_fw.bin" 33 34 struct lt9611uxc { 35 struct device *dev; 36 struct drm_bridge bridge; 37 struct drm_connector connector; 38 39 struct regmap *regmap; 40 /* Protects all accesses to registers by stopping the on-chip MCU */ 41 struct mutex ocm_lock; 42 43 struct wait_queue_head wq; 44 struct work_struct work; 45 46 struct device_node *dsi0_node; 47 struct device_node *dsi1_node; 48 struct mipi_dsi_device *dsi0; 49 struct mipi_dsi_device *dsi1; 50 struct platform_device *audio_pdev; 51 52 struct gpio_desc *reset_gpio; 53 struct gpio_desc *enable_gpio; 54 55 struct regulator_bulk_data supplies[2]; 56 57 struct i2c_client *client; 58 59 bool hpd_supported; 60 bool edid_read; 61 /* can be accessed from different threads, so protect this with ocm_lock */ 62 bool hdmi_connected; 63 uint8_t fw_version; 64 }; 65 66 #define LT9611_PAGE_CONTROL 0xff 67 68 static const struct regmap_range_cfg lt9611uxc_ranges[] = { 69 { 70 .name = "register_range", 71 .range_min = 0, 72 .range_max = 0xd0ff, 73 .selector_reg = LT9611_PAGE_CONTROL, 74 .selector_mask = 0xff, 75 .selector_shift = 0, 76 .window_start = 0, 77 .window_len = 0x100, 78 }, 79 }; 80 81 static const struct regmap_config lt9611uxc_regmap_config = { 82 .reg_bits = 8, 83 .val_bits = 8, 84 .max_register = 0xffff, 85 .ranges = lt9611uxc_ranges, 86 .num_ranges = ARRAY_SIZE(lt9611uxc_ranges), 87 }; 88 89 struct lt9611uxc_mode { 90 u16 hdisplay; 91 u16 vdisplay; 92 u8 vrefresh; 93 }; 94 95 /* 96 * This chip supports only a fixed set of modes. 97 * Enumerate them here to check whether the mode is supported. 98 */ 99 static struct lt9611uxc_mode lt9611uxc_modes[] = { 100 { 1920, 1080, 60 }, 101 { 1920, 1080, 30 }, 102 { 1920, 1080, 25 }, 103 { 1366, 768, 60 }, 104 { 1360, 768, 60 }, 105 { 1280, 1024, 60 }, 106 { 1280, 800, 60 }, 107 { 1280, 720, 60 }, 108 { 1280, 720, 50 }, 109 { 1280, 720, 30 }, 110 { 1152, 864, 60 }, 111 { 1024, 768, 60 }, 112 { 800, 600, 60 }, 113 { 720, 576, 50 }, 114 { 720, 480, 60 }, 115 { 640, 480, 60 }, 116 }; 117 118 static struct lt9611uxc *bridge_to_lt9611uxc(struct drm_bridge *bridge) 119 { 120 return container_of(bridge, struct lt9611uxc, bridge); 121 } 122 123 static struct lt9611uxc *connector_to_lt9611uxc(struct drm_connector *connector) 124 { 125 return container_of(connector, struct lt9611uxc, connector); 126 } 127 128 static void lt9611uxc_lock(struct lt9611uxc *lt9611uxc) 129 { 130 mutex_lock(<9611uxc->ocm_lock); 131 regmap_write(lt9611uxc->regmap, 0x80ee, 0x01); 132 } 133 134 static void lt9611uxc_unlock(struct lt9611uxc *lt9611uxc) 135 { 136 regmap_write(lt9611uxc->regmap, 0x80ee, 0x00); 137 msleep(50); 138 mutex_unlock(<9611uxc->ocm_lock); 139 } 140 141 static irqreturn_t lt9611uxc_irq_thread_handler(int irq, void *dev_id) 142 { 143 struct lt9611uxc *lt9611uxc = dev_id; 144 unsigned int irq_status = 0; 145 unsigned int hpd_status = 0; 146 147 lt9611uxc_lock(lt9611uxc); 148 149 regmap_read(lt9611uxc->regmap, 0xb022, &irq_status); 150 regmap_read(lt9611uxc->regmap, 0xb023, &hpd_status); 151 if (irq_status) 152 regmap_write(lt9611uxc->regmap, 0xb022, 0); 153 154 if (irq_status & BIT(0)) { 155 lt9611uxc->edid_read = !!(hpd_status & BIT(0)); 156 wake_up_all(<9611uxc->wq); 157 } 158 159 if (irq_status & BIT(1)) { 160 lt9611uxc->hdmi_connected = hpd_status & BIT(1); 161 schedule_work(<9611uxc->work); 162 } 163 164 lt9611uxc_unlock(lt9611uxc); 165 166 return IRQ_HANDLED; 167 } 168 169 static void lt9611uxc_hpd_work(struct work_struct *work) 170 { 171 struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work); 172 bool connected; 173 174 if (lt9611uxc->connector.dev) { 175 if (lt9611uxc->connector.dev->mode_config.funcs) 176 drm_kms_helper_hotplug_event(lt9611uxc->connector.dev); 177 } else { 178 179 mutex_lock(<9611uxc->ocm_lock); 180 connected = lt9611uxc->hdmi_connected; 181 mutex_unlock(<9611uxc->ocm_lock); 182 183 drm_bridge_hpd_notify(<9611uxc->bridge, 184 connected ? 185 connector_status_connected : 186 connector_status_disconnected); 187 } 188 } 189 190 static void lt9611uxc_reset(struct lt9611uxc *lt9611uxc) 191 { 192 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1); 193 msleep(20); 194 195 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 0); 196 msleep(20); 197 198 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1); 199 msleep(300); 200 } 201 202 static void lt9611uxc_assert_5v(struct lt9611uxc *lt9611uxc) 203 { 204 if (!lt9611uxc->enable_gpio) 205 return; 206 207 gpiod_set_value_cansleep(lt9611uxc->enable_gpio, 1); 208 msleep(20); 209 } 210 211 static int lt9611uxc_regulator_init(struct lt9611uxc *lt9611uxc) 212 { 213 int ret; 214 215 lt9611uxc->supplies[0].supply = "vdd"; 216 lt9611uxc->supplies[1].supply = "vcc"; 217 218 ret = devm_regulator_bulk_get(lt9611uxc->dev, 2, lt9611uxc->supplies); 219 if (ret < 0) 220 return ret; 221 222 return regulator_set_load(lt9611uxc->supplies[0].consumer, 200000); 223 } 224 225 static int lt9611uxc_regulator_enable(struct lt9611uxc *lt9611uxc) 226 { 227 int ret; 228 229 ret = regulator_enable(lt9611uxc->supplies[0].consumer); 230 if (ret < 0) 231 return ret; 232 233 usleep_range(1000, 10000); /* 50000 according to dtsi */ 234 235 ret = regulator_enable(lt9611uxc->supplies[1].consumer); 236 if (ret < 0) { 237 regulator_disable(lt9611uxc->supplies[0].consumer); 238 return ret; 239 } 240 241 return 0; 242 } 243 244 static struct lt9611uxc_mode *lt9611uxc_find_mode(const struct drm_display_mode *mode) 245 { 246 int i; 247 248 for (i = 0; i < ARRAY_SIZE(lt9611uxc_modes); i++) { 249 if (lt9611uxc_modes[i].hdisplay == mode->hdisplay && 250 lt9611uxc_modes[i].vdisplay == mode->vdisplay && 251 lt9611uxc_modes[i].vrefresh == drm_mode_vrefresh(mode)) { 252 return <9611uxc_modes[i]; 253 } 254 } 255 256 return NULL; 257 } 258 259 static struct mipi_dsi_device *lt9611uxc_attach_dsi(struct lt9611uxc *lt9611uxc, 260 struct device_node *dsi_node) 261 { 262 const struct mipi_dsi_device_info info = { "lt9611uxc", 0, NULL }; 263 struct mipi_dsi_device *dsi; 264 struct mipi_dsi_host *host; 265 struct device *dev = lt9611uxc->dev; 266 int ret; 267 268 host = of_find_mipi_dsi_host_by_node(dsi_node); 269 if (!host) 270 return ERR_PTR(dev_err_probe(dev, -EPROBE_DEFER, "failed to find dsi host\n")); 271 272 dsi = devm_mipi_dsi_device_register_full(dev, host, &info); 273 if (IS_ERR(dsi)) { 274 dev_err(dev, "failed to create dsi device\n"); 275 return dsi; 276 } 277 278 dsi->lanes = 4; 279 dsi->format = MIPI_DSI_FMT_RGB888; 280 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 281 MIPI_DSI_MODE_VIDEO_HSE; 282 283 ret = devm_mipi_dsi_attach(dev, dsi); 284 if (ret < 0) { 285 dev_err(dev, "failed to attach dsi to host\n"); 286 return ERR_PTR(ret); 287 } 288 289 return dsi; 290 } 291 292 static int lt9611uxc_connector_get_modes(struct drm_connector *connector) 293 { 294 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector); 295 const struct drm_edid *drm_edid; 296 int count; 297 298 drm_edid = drm_bridge_edid_read(<9611uxc->bridge, connector); 299 drm_edid_connector_update(connector, drm_edid); 300 count = drm_edid_connector_add_modes(connector); 301 drm_edid_free(drm_edid); 302 303 return count; 304 } 305 306 static enum drm_connector_status lt9611uxc_connector_detect(struct drm_connector *connector, 307 bool force) 308 { 309 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector); 310 311 return lt9611uxc->bridge.funcs->detect(<9611uxc->bridge); 312 } 313 314 static enum drm_mode_status lt9611uxc_connector_mode_valid(struct drm_connector *connector, 315 struct drm_display_mode *mode) 316 { 317 struct lt9611uxc_mode *lt9611uxc_mode = lt9611uxc_find_mode(mode); 318 319 return lt9611uxc_mode ? MODE_OK : MODE_BAD; 320 } 321 322 static const struct drm_connector_helper_funcs lt9611uxc_bridge_connector_helper_funcs = { 323 .get_modes = lt9611uxc_connector_get_modes, 324 .mode_valid = lt9611uxc_connector_mode_valid, 325 }; 326 327 static const struct drm_connector_funcs lt9611uxc_bridge_connector_funcs = { 328 .fill_modes = drm_helper_probe_single_connector_modes, 329 .detect = lt9611uxc_connector_detect, 330 .destroy = drm_connector_cleanup, 331 .reset = drm_atomic_helper_connector_reset, 332 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 333 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 334 }; 335 336 static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc *lt9611uxc) 337 { 338 int ret; 339 340 if (!bridge->encoder) { 341 DRM_ERROR("Parent encoder object not found"); 342 return -ENODEV; 343 } 344 345 lt9611uxc->connector.polled = DRM_CONNECTOR_POLL_HPD; 346 347 drm_connector_helper_add(<9611uxc->connector, 348 <9611uxc_bridge_connector_helper_funcs); 349 ret = drm_connector_init(bridge->dev, <9611uxc->connector, 350 <9611uxc_bridge_connector_funcs, 351 DRM_MODE_CONNECTOR_HDMIA); 352 if (ret) { 353 DRM_ERROR("Failed to initialize connector with drm\n"); 354 return ret; 355 } 356 357 return drm_connector_attach_encoder(<9611uxc->connector, bridge->encoder); 358 } 359 360 static int lt9611uxc_bridge_attach(struct drm_bridge *bridge, 361 enum drm_bridge_attach_flags flags) 362 { 363 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 364 int ret; 365 366 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { 367 ret = lt9611uxc_connector_init(bridge, lt9611uxc); 368 if (ret < 0) 369 return ret; 370 } 371 372 return 0; 373 } 374 375 static enum drm_mode_status 376 lt9611uxc_bridge_mode_valid(struct drm_bridge *bridge, 377 const struct drm_display_info *info, 378 const struct drm_display_mode *mode) 379 { 380 struct lt9611uxc_mode *lt9611uxc_mode; 381 382 lt9611uxc_mode = lt9611uxc_find_mode(mode); 383 384 return lt9611uxc_mode ? MODE_OK : MODE_BAD; 385 } 386 387 static void lt9611uxc_video_setup(struct lt9611uxc *lt9611uxc, 388 const struct drm_display_mode *mode) 389 { 390 u32 h_total, hactive, hsync_len, hfront_porch; 391 u32 v_total, vactive, vsync_len, vfront_porch; 392 393 h_total = mode->htotal; 394 v_total = mode->vtotal; 395 396 hactive = mode->hdisplay; 397 hsync_len = mode->hsync_end - mode->hsync_start; 398 hfront_porch = mode->hsync_start - mode->hdisplay; 399 400 vactive = mode->vdisplay; 401 vsync_len = mode->vsync_end - mode->vsync_start; 402 vfront_porch = mode->vsync_start - mode->vdisplay; 403 404 regmap_write(lt9611uxc->regmap, 0xd00d, (u8)(v_total / 256)); 405 regmap_write(lt9611uxc->regmap, 0xd00e, (u8)(v_total % 256)); 406 407 regmap_write(lt9611uxc->regmap, 0xd00f, (u8)(vactive / 256)); 408 regmap_write(lt9611uxc->regmap, 0xd010, (u8)(vactive % 256)); 409 410 regmap_write(lt9611uxc->regmap, 0xd011, (u8)(h_total / 256)); 411 regmap_write(lt9611uxc->regmap, 0xd012, (u8)(h_total % 256)); 412 413 regmap_write(lt9611uxc->regmap, 0xd013, (u8)(hactive / 256)); 414 regmap_write(lt9611uxc->regmap, 0xd014, (u8)(hactive % 256)); 415 416 regmap_write(lt9611uxc->regmap, 0xd015, (u8)(vsync_len % 256)); 417 418 regmap_update_bits(lt9611uxc->regmap, 0xd016, 0xf, (u8)(hsync_len / 256)); 419 regmap_write(lt9611uxc->regmap, 0xd017, (u8)(hsync_len % 256)); 420 421 regmap_update_bits(lt9611uxc->regmap, 0xd018, 0xf, (u8)(vfront_porch / 256)); 422 regmap_write(lt9611uxc->regmap, 0xd019, (u8)(vfront_porch % 256)); 423 424 regmap_update_bits(lt9611uxc->regmap, 0xd01a, 0xf, (u8)(hfront_porch / 256)); 425 regmap_write(lt9611uxc->regmap, 0xd01b, (u8)(hfront_porch % 256)); 426 } 427 428 static void lt9611uxc_bridge_mode_set(struct drm_bridge *bridge, 429 const struct drm_display_mode *mode, 430 const struct drm_display_mode *adj_mode) 431 { 432 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 433 434 lt9611uxc_lock(lt9611uxc); 435 lt9611uxc_video_setup(lt9611uxc, mode); 436 lt9611uxc_unlock(lt9611uxc); 437 } 438 439 static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *bridge) 440 { 441 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 442 unsigned int reg_val = 0; 443 int ret; 444 bool connected = true; 445 446 lt9611uxc_lock(lt9611uxc); 447 448 if (lt9611uxc->hpd_supported) { 449 ret = regmap_read(lt9611uxc->regmap, 0xb023, ®_val); 450 451 if (ret) 452 dev_err(lt9611uxc->dev, "failed to read hpd status: %d\n", ret); 453 else 454 connected = reg_val & BIT(1); 455 } 456 lt9611uxc->hdmi_connected = connected; 457 458 lt9611uxc_unlock(lt9611uxc); 459 460 return connected ? connector_status_connected : 461 connector_status_disconnected; 462 } 463 464 static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc) 465 { 466 return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read, 467 msecs_to_jiffies(500)); 468 } 469 470 static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) 471 { 472 struct lt9611uxc *lt9611uxc = data; 473 int ret; 474 475 if (len > EDID_BLOCK_SIZE) 476 return -EINVAL; 477 478 if (block >= EDID_NUM_BLOCKS) 479 return -EINVAL; 480 481 lt9611uxc_lock(lt9611uxc); 482 483 regmap_write(lt9611uxc->regmap, 0xb00b, 0x10); 484 485 regmap_write(lt9611uxc->regmap, 0xb00a, block * EDID_BLOCK_SIZE); 486 487 ret = regmap_noinc_read(lt9611uxc->regmap, 0xb0b0, buf, len); 488 if (ret) 489 dev_err(lt9611uxc->dev, "edid read failed: %d\n", ret); 490 491 lt9611uxc_unlock(lt9611uxc); 492 493 return 0; 494 }; 495 496 static const struct drm_edid *lt9611uxc_bridge_edid_read(struct drm_bridge *bridge, 497 struct drm_connector *connector) 498 { 499 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 500 int ret; 501 502 ret = lt9611uxc_wait_for_edid(lt9611uxc); 503 if (ret < 0) { 504 dev_err(lt9611uxc->dev, "wait for EDID failed: %d\n", ret); 505 return NULL; 506 } else if (ret == 0) { 507 dev_err(lt9611uxc->dev, "wait for EDID timeout\n"); 508 return NULL; 509 } 510 511 return drm_edid_read_custom(connector, lt9611uxc_get_edid_block, lt9611uxc); 512 } 513 514 static const struct drm_bridge_funcs lt9611uxc_bridge_funcs = { 515 .attach = lt9611uxc_bridge_attach, 516 .mode_valid = lt9611uxc_bridge_mode_valid, 517 .mode_set = lt9611uxc_bridge_mode_set, 518 .detect = lt9611uxc_bridge_detect, 519 .edid_read = lt9611uxc_bridge_edid_read, 520 }; 521 522 static int lt9611uxc_parse_dt(struct device *dev, 523 struct lt9611uxc *lt9611uxc) 524 { 525 lt9611uxc->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1); 526 if (!lt9611uxc->dsi0_node) { 527 dev_err(lt9611uxc->dev, "failed to get remote node for primary dsi\n"); 528 return -ENODEV; 529 } 530 531 lt9611uxc->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1); 532 533 return 0; 534 } 535 536 static int lt9611uxc_gpio_init(struct lt9611uxc *lt9611uxc) 537 { 538 struct device *dev = lt9611uxc->dev; 539 540 lt9611uxc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 541 if (IS_ERR(lt9611uxc->reset_gpio)) { 542 dev_err(dev, "failed to acquire reset gpio\n"); 543 return PTR_ERR(lt9611uxc->reset_gpio); 544 } 545 546 lt9611uxc->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW); 547 if (IS_ERR(lt9611uxc->enable_gpio)) { 548 dev_err(dev, "failed to acquire enable gpio\n"); 549 return PTR_ERR(lt9611uxc->enable_gpio); 550 } 551 552 return 0; 553 } 554 555 static int lt9611uxc_read_device_rev(struct lt9611uxc *lt9611uxc) 556 { 557 unsigned int rev0, rev1, rev2; 558 int ret; 559 560 lt9611uxc_lock(lt9611uxc); 561 562 ret = regmap_read(lt9611uxc->regmap, 0x8100, &rev0); 563 ret |= regmap_read(lt9611uxc->regmap, 0x8101, &rev1); 564 ret |= regmap_read(lt9611uxc->regmap, 0x8102, &rev2); 565 if (ret) 566 dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret); 567 else 568 dev_info(lt9611uxc->dev, "LT9611 revision: 0x%02x.%02x.%02x\n", rev0, rev1, rev2); 569 570 lt9611uxc_unlock(lt9611uxc); 571 572 return ret; 573 } 574 575 static int lt9611uxc_read_version(struct lt9611uxc *lt9611uxc) 576 { 577 unsigned int rev; 578 int ret; 579 580 lt9611uxc_lock(lt9611uxc); 581 582 ret = regmap_read(lt9611uxc->regmap, 0xb021, &rev); 583 if (ret) 584 dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret); 585 else 586 dev_info(lt9611uxc->dev, "LT9611 version: 0x%02x\n", rev); 587 588 lt9611uxc_unlock(lt9611uxc); 589 590 return ret < 0 ? ret : rev; 591 } 592 593 static int lt9611uxc_hdmi_hw_params(struct device *dev, void *data, 594 struct hdmi_codec_daifmt *fmt, 595 struct hdmi_codec_params *hparms) 596 { 597 /* 598 * LT9611UXC will automatically detect rate and sample size, so no need 599 * to setup anything here. 600 */ 601 return 0; 602 } 603 604 static void lt9611uxc_audio_shutdown(struct device *dev, void *data) 605 { 606 } 607 608 static int lt9611uxc_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 609 struct device_node *endpoint) 610 { 611 struct of_endpoint of_ep; 612 int ret; 613 614 ret = of_graph_parse_endpoint(endpoint, &of_ep); 615 if (ret < 0) 616 return ret; 617 618 /* 619 * HDMI sound should be located as reg = <2> 620 * Then, it is sound port 0 621 */ 622 if (of_ep.port == 2) 623 return 0; 624 625 return -EINVAL; 626 } 627 628 static const struct hdmi_codec_ops lt9611uxc_codec_ops = { 629 .hw_params = lt9611uxc_hdmi_hw_params, 630 .audio_shutdown = lt9611uxc_audio_shutdown, 631 .get_dai_id = lt9611uxc_hdmi_i2s_get_dai_id, 632 }; 633 634 static int lt9611uxc_audio_init(struct device *dev, struct lt9611uxc *lt9611uxc) 635 { 636 struct hdmi_codec_pdata codec_data = { 637 .ops = <9611uxc_codec_ops, 638 .max_i2s_channels = 2, 639 .i2s = 1, 640 .data = lt9611uxc, 641 }; 642 643 lt9611uxc->audio_pdev = 644 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, 645 PLATFORM_DEVID_AUTO, 646 &codec_data, sizeof(codec_data)); 647 648 return PTR_ERR_OR_ZERO(lt9611uxc->audio_pdev); 649 } 650 651 static void lt9611uxc_audio_exit(struct lt9611uxc *lt9611uxc) 652 { 653 if (lt9611uxc->audio_pdev) { 654 platform_device_unregister(lt9611uxc->audio_pdev); 655 lt9611uxc->audio_pdev = NULL; 656 } 657 } 658 659 #define LT9611UXC_FW_PAGE_SIZE 32 660 static void lt9611uxc_firmware_write_page(struct lt9611uxc *lt9611uxc, u16 addr, const u8 *buf) 661 { 662 struct reg_sequence seq_write_prepare[] = { 663 REG_SEQ0(0x805a, 0x04), 664 REG_SEQ0(0x805a, 0x00), 665 666 REG_SEQ0(0x805e, 0xdf), 667 REG_SEQ0(0x805a, 0x20), 668 REG_SEQ0(0x805a, 0x00), 669 REG_SEQ0(0x8058, 0x21), 670 }; 671 672 struct reg_sequence seq_write_addr[] = { 673 REG_SEQ0(0x805b, (addr >> 16) & 0xff), 674 REG_SEQ0(0x805c, (addr >> 8) & 0xff), 675 REG_SEQ0(0x805d, addr & 0xff), 676 REG_SEQ0(0x805a, 0x10), 677 REG_SEQ0(0x805a, 0x00), 678 }; 679 680 regmap_write(lt9611uxc->regmap, 0x8108, 0xbf); 681 msleep(20); 682 regmap_write(lt9611uxc->regmap, 0x8108, 0xff); 683 msleep(20); 684 regmap_multi_reg_write(lt9611uxc->regmap, seq_write_prepare, ARRAY_SIZE(seq_write_prepare)); 685 regmap_noinc_write(lt9611uxc->regmap, 0x8059, buf, LT9611UXC_FW_PAGE_SIZE); 686 regmap_multi_reg_write(lt9611uxc->regmap, seq_write_addr, ARRAY_SIZE(seq_write_addr)); 687 msleep(20); 688 } 689 690 static void lt9611uxc_firmware_read_page(struct lt9611uxc *lt9611uxc, u16 addr, char *buf) 691 { 692 struct reg_sequence seq_read_page[] = { 693 REG_SEQ0(0x805a, 0xa0), 694 REG_SEQ0(0x805a, 0x80), 695 REG_SEQ0(0x805b, (addr >> 16) & 0xff), 696 REG_SEQ0(0x805c, (addr >> 8) & 0xff), 697 REG_SEQ0(0x805d, addr & 0xff), 698 REG_SEQ0(0x805a, 0x90), 699 REG_SEQ0(0x805a, 0x80), 700 REG_SEQ0(0x8058, 0x21), 701 }; 702 703 regmap_multi_reg_write(lt9611uxc->regmap, seq_read_page, ARRAY_SIZE(seq_read_page)); 704 regmap_noinc_read(lt9611uxc->regmap, 0x805f, buf, LT9611UXC_FW_PAGE_SIZE); 705 } 706 707 static char *lt9611uxc_firmware_read(struct lt9611uxc *lt9611uxc, size_t size) 708 { 709 struct reg_sequence seq_read_setup[] = { 710 REG_SEQ0(0x805a, 0x84), 711 REG_SEQ0(0x805a, 0x80), 712 }; 713 714 char *readbuf; 715 u16 offset; 716 717 readbuf = kzalloc(ALIGN(size, 32), GFP_KERNEL); 718 if (!readbuf) 719 return NULL; 720 721 regmap_multi_reg_write(lt9611uxc->regmap, seq_read_setup, ARRAY_SIZE(seq_read_setup)); 722 723 for (offset = 0; 724 offset < size; 725 offset += LT9611UXC_FW_PAGE_SIZE) 726 lt9611uxc_firmware_read_page(lt9611uxc, offset, &readbuf[offset]); 727 728 return readbuf; 729 } 730 731 static int lt9611uxc_firmware_update(struct lt9611uxc *lt9611uxc) 732 { 733 int ret; 734 u16 offset; 735 size_t remain; 736 char *readbuf; 737 const struct firmware *fw; 738 739 struct reg_sequence seq_setup[] = { 740 REG_SEQ0(0x805e, 0xdf), 741 REG_SEQ0(0x8058, 0x00), 742 REG_SEQ0(0x8059, 0x50), 743 REG_SEQ0(0x805a, 0x10), 744 REG_SEQ0(0x805a, 0x00), 745 }; 746 747 748 struct reg_sequence seq_block_erase[] = { 749 REG_SEQ0(0x805a, 0x04), 750 REG_SEQ0(0x805a, 0x00), 751 REG_SEQ0(0x805b, 0x00), 752 REG_SEQ0(0x805c, 0x00), 753 REG_SEQ0(0x805d, 0x00), 754 REG_SEQ0(0x805a, 0x01), 755 REG_SEQ0(0x805a, 0x00), 756 }; 757 758 ret = request_firmware(&fw, FW_FILE, lt9611uxc->dev); 759 if (ret < 0) 760 return ret; 761 762 dev_info(lt9611uxc->dev, "Updating firmware\n"); 763 lt9611uxc_lock(lt9611uxc); 764 765 regmap_multi_reg_write(lt9611uxc->regmap, seq_setup, ARRAY_SIZE(seq_setup)); 766 767 /* 768 * Need erase block 2 timess here. Sometimes, block erase can fail. 769 * This is a workaroud. 770 */ 771 regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase)); 772 msleep(3000); 773 regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase)); 774 msleep(3000); 775 776 for (offset = 0, remain = fw->size; 777 remain >= LT9611UXC_FW_PAGE_SIZE; 778 offset += LT9611UXC_FW_PAGE_SIZE, remain -= LT9611UXC_FW_PAGE_SIZE) 779 lt9611uxc_firmware_write_page(lt9611uxc, offset, fw->data + offset); 780 781 if (remain > 0) { 782 char buf[LT9611UXC_FW_PAGE_SIZE]; 783 784 memset(buf, 0xff, LT9611UXC_FW_PAGE_SIZE); 785 memcpy(buf, fw->data + offset, remain); 786 lt9611uxc_firmware_write_page(lt9611uxc, offset, buf); 787 } 788 msleep(20); 789 790 readbuf = lt9611uxc_firmware_read(lt9611uxc, fw->size); 791 if (!readbuf) { 792 ret = -ENOMEM; 793 goto out; 794 } 795 796 if (!memcmp(readbuf, fw->data, fw->size)) { 797 dev_err(lt9611uxc->dev, "Firmware update failed\n"); 798 print_hex_dump(KERN_ERR, "fw: ", DUMP_PREFIX_OFFSET, 16, 1, readbuf, fw->size, false); 799 ret = -EINVAL; 800 } else { 801 dev_info(lt9611uxc->dev, "Firmware updates successfully\n"); 802 ret = 0; 803 } 804 kfree(readbuf); 805 806 out: 807 lt9611uxc_unlock(lt9611uxc); 808 lt9611uxc_reset(lt9611uxc); 809 release_firmware(fw); 810 811 return ret; 812 } 813 814 static ssize_t lt9611uxc_firmware_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) 815 { 816 struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev); 817 int ret; 818 819 ret = lt9611uxc_firmware_update(lt9611uxc); 820 if (ret < 0) 821 return ret; 822 return len; 823 } 824 825 static ssize_t lt9611uxc_firmware_show(struct device *dev, struct device_attribute *attr, char *buf) 826 { 827 struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev); 828 829 return sysfs_emit(buf, "%02x\n", lt9611uxc->fw_version); 830 } 831 832 static DEVICE_ATTR_RW(lt9611uxc_firmware); 833 834 static struct attribute *lt9611uxc_attrs[] = { 835 &dev_attr_lt9611uxc_firmware.attr, 836 NULL, 837 }; 838 839 static const struct attribute_group lt9611uxc_attr_group = { 840 .attrs = lt9611uxc_attrs, 841 }; 842 843 static const struct attribute_group *lt9611uxc_attr_groups[] = { 844 <9611uxc_attr_group, 845 NULL, 846 }; 847 848 static int lt9611uxc_probe(struct i2c_client *client) 849 { 850 struct lt9611uxc *lt9611uxc; 851 struct device *dev = &client->dev; 852 int ret; 853 bool fw_updated = false; 854 855 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 856 dev_err(dev, "device doesn't support I2C\n"); 857 return -ENODEV; 858 } 859 860 lt9611uxc = devm_kzalloc(dev, sizeof(*lt9611uxc), GFP_KERNEL); 861 if (!lt9611uxc) 862 return -ENOMEM; 863 864 lt9611uxc->dev = dev; 865 lt9611uxc->client = client; 866 mutex_init(<9611uxc->ocm_lock); 867 868 lt9611uxc->regmap = devm_regmap_init_i2c(client, <9611uxc_regmap_config); 869 if (IS_ERR(lt9611uxc->regmap)) { 870 dev_err(lt9611uxc->dev, "regmap i2c init failed\n"); 871 return PTR_ERR(lt9611uxc->regmap); 872 } 873 874 ret = lt9611uxc_parse_dt(dev, lt9611uxc); 875 if (ret) { 876 dev_err(dev, "failed to parse device tree\n"); 877 return ret; 878 } 879 880 ret = lt9611uxc_gpio_init(lt9611uxc); 881 if (ret < 0) 882 goto err_of_put; 883 884 ret = lt9611uxc_regulator_init(lt9611uxc); 885 if (ret < 0) 886 goto err_of_put; 887 888 lt9611uxc_assert_5v(lt9611uxc); 889 890 ret = lt9611uxc_regulator_enable(lt9611uxc); 891 if (ret) 892 goto err_of_put; 893 894 lt9611uxc_reset(lt9611uxc); 895 896 ret = lt9611uxc_read_device_rev(lt9611uxc); 897 if (ret) { 898 dev_err(dev, "failed to read chip rev\n"); 899 goto err_disable_regulators; 900 } 901 902 retry: 903 ret = lt9611uxc_read_version(lt9611uxc); 904 if (ret < 0) { 905 dev_err(dev, "failed to read FW version\n"); 906 goto err_disable_regulators; 907 } else if (ret == 0) { 908 if (!fw_updated) { 909 fw_updated = true; 910 dev_err(dev, "FW version 0, enforcing firmware update\n"); 911 ret = lt9611uxc_firmware_update(lt9611uxc); 912 if (ret < 0) 913 goto err_disable_regulators; 914 else 915 goto retry; 916 } else { 917 dev_err(dev, "FW version 0, update failed\n"); 918 ret = -EOPNOTSUPP; 919 goto err_disable_regulators; 920 } 921 } else if (ret < 0x40) { 922 dev_info(dev, "FW version 0x%x, HPD not supported\n", ret); 923 } else { 924 lt9611uxc->hpd_supported = true; 925 } 926 lt9611uxc->fw_version = ret; 927 928 init_waitqueue_head(<9611uxc->wq); 929 INIT_WORK(<9611uxc->work, lt9611uxc_hpd_work); 930 931 ret = request_threaded_irq(client->irq, NULL, 932 lt9611uxc_irq_thread_handler, 933 IRQF_ONESHOT, "lt9611uxc", lt9611uxc); 934 if (ret) { 935 dev_err(dev, "failed to request irq\n"); 936 goto err_disable_regulators; 937 } 938 939 i2c_set_clientdata(client, lt9611uxc); 940 941 lt9611uxc->bridge.funcs = <9611uxc_bridge_funcs; 942 lt9611uxc->bridge.of_node = client->dev.of_node; 943 lt9611uxc->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID; 944 if (lt9611uxc->hpd_supported) 945 lt9611uxc->bridge.ops |= DRM_BRIDGE_OP_HPD; 946 lt9611uxc->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 947 948 drm_bridge_add(<9611uxc->bridge); 949 950 /* Attach primary DSI */ 951 lt9611uxc->dsi0 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi0_node); 952 if (IS_ERR(lt9611uxc->dsi0)) { 953 ret = PTR_ERR(lt9611uxc->dsi0); 954 goto err_remove_bridge; 955 } 956 957 /* Attach secondary DSI, if specified */ 958 if (lt9611uxc->dsi1_node) { 959 lt9611uxc->dsi1 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi1_node); 960 if (IS_ERR(lt9611uxc->dsi1)) { 961 ret = PTR_ERR(lt9611uxc->dsi1); 962 goto err_remove_bridge; 963 } 964 } 965 966 return lt9611uxc_audio_init(dev, lt9611uxc); 967 968 err_remove_bridge: 969 free_irq(client->irq, lt9611uxc); 970 cancel_work_sync(<9611uxc->work); 971 drm_bridge_remove(<9611uxc->bridge); 972 973 err_disable_regulators: 974 regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies); 975 976 err_of_put: 977 of_node_put(lt9611uxc->dsi1_node); 978 of_node_put(lt9611uxc->dsi0_node); 979 980 return ret; 981 } 982 983 static void lt9611uxc_remove(struct i2c_client *client) 984 { 985 struct lt9611uxc *lt9611uxc = i2c_get_clientdata(client); 986 987 free_irq(client->irq, lt9611uxc); 988 cancel_work_sync(<9611uxc->work); 989 lt9611uxc_audio_exit(lt9611uxc); 990 drm_bridge_remove(<9611uxc->bridge); 991 992 mutex_destroy(<9611uxc->ocm_lock); 993 994 regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies); 995 996 of_node_put(lt9611uxc->dsi1_node); 997 of_node_put(lt9611uxc->dsi0_node); 998 } 999 1000 static struct i2c_device_id lt9611uxc_id[] = { 1001 { "lontium,lt9611uxc", 0 }, 1002 { /* sentinel */ } 1003 }; 1004 1005 static const struct of_device_id lt9611uxc_match_table[] = { 1006 { .compatible = "lontium,lt9611uxc" }, 1007 { /* sentinel */ } 1008 }; 1009 MODULE_DEVICE_TABLE(of, lt9611uxc_match_table); 1010 1011 static struct i2c_driver lt9611uxc_driver = { 1012 .driver = { 1013 .name = "lt9611uxc", 1014 .of_match_table = lt9611uxc_match_table, 1015 .dev_groups = lt9611uxc_attr_groups, 1016 }, 1017 .probe = lt9611uxc_probe, 1018 .remove = lt9611uxc_remove, 1019 .id_table = lt9611uxc_id, 1020 }; 1021 module_i2c_driver(lt9611uxc_driver); 1022 1023 MODULE_AUTHOR("Dmitry Baryshkov <dmitry.baryshkov@linaro.org>"); 1024 MODULE_LICENSE("GPL v2"); 1025 1026 MODULE_FIRMWARE(FW_FILE); 1027