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_mipi_dsi.h> 25 #include <drm/drm_print.h> 26 #include <drm/drm_probe_helper.h> 27 28 #define EDID_BLOCK_SIZE 128 29 #define EDID_NUM_BLOCKS 2 30 31 #define FW_FILE "lt9611uxc_fw.bin" 32 33 struct lt9611uxc { 34 struct device *dev; 35 struct drm_bridge bridge; 36 struct drm_connector connector; 37 38 struct regmap *regmap; 39 /* Protects all accesses to registers by stopping the on-chip MCU */ 40 struct mutex ocm_lock; 41 42 struct wait_queue_head wq; 43 struct work_struct work; 44 45 struct device_node *dsi0_node; 46 struct device_node *dsi1_node; 47 struct mipi_dsi_device *dsi0; 48 struct mipi_dsi_device *dsi1; 49 struct platform_device *audio_pdev; 50 51 struct gpio_desc *reset_gpio; 52 struct gpio_desc *enable_gpio; 53 54 struct regulator_bulk_data supplies[2]; 55 56 struct i2c_client *client; 57 58 bool hpd_supported; 59 bool edid_read; 60 /* can be accessed from different threads, so protect this with ocm_lock */ 61 bool hdmi_connected; 62 uint8_t fw_version; 63 }; 64 65 #define LT9611_PAGE_CONTROL 0xff 66 67 static const struct regmap_range_cfg lt9611uxc_ranges[] = { 68 { 69 .name = "register_range", 70 .range_min = 0, 71 .range_max = 0xd0ff, 72 .selector_reg = LT9611_PAGE_CONTROL, 73 .selector_mask = 0xff, 74 .selector_shift = 0, 75 .window_start = 0, 76 .window_len = 0x100, 77 }, 78 }; 79 80 static const struct regmap_config lt9611uxc_regmap_config = { 81 .reg_bits = 8, 82 .val_bits = 8, 83 .max_register = 0xffff, 84 .ranges = lt9611uxc_ranges, 85 .num_ranges = ARRAY_SIZE(lt9611uxc_ranges), 86 }; 87 88 struct lt9611uxc_mode { 89 u16 hdisplay; 90 u16 vdisplay; 91 u8 vrefresh; 92 }; 93 94 /* 95 * This chip supports only a fixed set of modes. 96 * Enumerate them here to check whether the mode is supported. 97 */ 98 static struct lt9611uxc_mode lt9611uxc_modes[] = { 99 { 1920, 1080, 60 }, 100 { 1920, 1080, 30 }, 101 { 1920, 1080, 25 }, 102 { 1366, 768, 60 }, 103 { 1360, 768, 60 }, 104 { 1280, 1024, 60 }, 105 { 1280, 800, 60 }, 106 { 1280, 720, 60 }, 107 { 1280, 720, 50 }, 108 { 1280, 720, 30 }, 109 { 1152, 864, 60 }, 110 { 1024, 768, 60 }, 111 { 800, 600, 60 }, 112 { 720, 576, 50 }, 113 { 720, 480, 60 }, 114 { 640, 480, 60 }, 115 }; 116 117 static struct lt9611uxc *bridge_to_lt9611uxc(struct drm_bridge *bridge) 118 { 119 return container_of(bridge, struct lt9611uxc, bridge); 120 } 121 122 static struct lt9611uxc *connector_to_lt9611uxc(struct drm_connector *connector) 123 { 124 return container_of(connector, struct lt9611uxc, connector); 125 } 126 127 static void lt9611uxc_lock(struct lt9611uxc *lt9611uxc) 128 { 129 mutex_lock(<9611uxc->ocm_lock); 130 regmap_write(lt9611uxc->regmap, 0x80ee, 0x01); 131 } 132 133 static void lt9611uxc_unlock(struct lt9611uxc *lt9611uxc) 134 { 135 regmap_write(lt9611uxc->regmap, 0x80ee, 0x00); 136 msleep(50); 137 mutex_unlock(<9611uxc->ocm_lock); 138 } 139 140 static irqreturn_t lt9611uxc_irq_thread_handler(int irq, void *dev_id) 141 { 142 struct lt9611uxc *lt9611uxc = dev_id; 143 unsigned int irq_status = 0; 144 unsigned int hpd_status = 0; 145 146 lt9611uxc_lock(lt9611uxc); 147 148 regmap_read(lt9611uxc->regmap, 0xb022, &irq_status); 149 regmap_read(lt9611uxc->regmap, 0xb023, &hpd_status); 150 if (irq_status) 151 regmap_write(lt9611uxc->regmap, 0xb022, 0); 152 153 if (irq_status & BIT(0)) { 154 lt9611uxc->edid_read = !!(hpd_status & BIT(0)); 155 wake_up_all(<9611uxc->wq); 156 } 157 158 if (irq_status & BIT(1)) { 159 lt9611uxc->hdmi_connected = hpd_status & BIT(1); 160 schedule_work(<9611uxc->work); 161 } 162 163 lt9611uxc_unlock(lt9611uxc); 164 165 return IRQ_HANDLED; 166 } 167 168 static void lt9611uxc_hpd_work(struct work_struct *work) 169 { 170 struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work); 171 bool connected; 172 173 if (lt9611uxc->connector.dev) { 174 if (lt9611uxc->connector.dev->mode_config.funcs) 175 drm_kms_helper_hotplug_event(lt9611uxc->connector.dev); 176 } else { 177 178 mutex_lock(<9611uxc->ocm_lock); 179 connected = lt9611uxc->hdmi_connected; 180 mutex_unlock(<9611uxc->ocm_lock); 181 182 drm_bridge_hpd_notify(<9611uxc->bridge, 183 connected ? 184 connector_status_connected : 185 connector_status_disconnected); 186 } 187 } 188 189 static void lt9611uxc_reset(struct lt9611uxc *lt9611uxc) 190 { 191 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1); 192 msleep(20); 193 194 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 0); 195 msleep(20); 196 197 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1); 198 msleep(300); 199 } 200 201 static void lt9611uxc_assert_5v(struct lt9611uxc *lt9611uxc) 202 { 203 if (!lt9611uxc->enable_gpio) 204 return; 205 206 gpiod_set_value_cansleep(lt9611uxc->enable_gpio, 1); 207 msleep(20); 208 } 209 210 static int lt9611uxc_regulator_init(struct lt9611uxc *lt9611uxc) 211 { 212 int ret; 213 214 lt9611uxc->supplies[0].supply = "vdd"; 215 lt9611uxc->supplies[1].supply = "vcc"; 216 217 ret = devm_regulator_bulk_get(lt9611uxc->dev, 2, lt9611uxc->supplies); 218 if (ret < 0) 219 return ret; 220 221 return regulator_set_load(lt9611uxc->supplies[0].consumer, 200000); 222 } 223 224 static int lt9611uxc_regulator_enable(struct lt9611uxc *lt9611uxc) 225 { 226 int ret; 227 228 ret = regulator_enable(lt9611uxc->supplies[0].consumer); 229 if (ret < 0) 230 return ret; 231 232 usleep_range(1000, 10000); /* 50000 according to dtsi */ 233 234 ret = regulator_enable(lt9611uxc->supplies[1].consumer); 235 if (ret < 0) { 236 regulator_disable(lt9611uxc->supplies[0].consumer); 237 return ret; 238 } 239 240 return 0; 241 } 242 243 static struct lt9611uxc_mode *lt9611uxc_find_mode(const struct drm_display_mode *mode) 244 { 245 int i; 246 247 for (i = 0; i < ARRAY_SIZE(lt9611uxc_modes); i++) { 248 if (lt9611uxc_modes[i].hdisplay == mode->hdisplay && 249 lt9611uxc_modes[i].vdisplay == mode->vdisplay && 250 lt9611uxc_modes[i].vrefresh == drm_mode_vrefresh(mode)) { 251 return <9611uxc_modes[i]; 252 } 253 } 254 255 return NULL; 256 } 257 258 static struct mipi_dsi_device *lt9611uxc_attach_dsi(struct lt9611uxc *lt9611uxc, 259 struct device_node *dsi_node) 260 { 261 const struct mipi_dsi_device_info info = { "lt9611uxc", 0, NULL }; 262 struct mipi_dsi_device *dsi; 263 struct mipi_dsi_host *host; 264 struct device *dev = lt9611uxc->dev; 265 int ret; 266 267 host = of_find_mipi_dsi_host_by_node(dsi_node); 268 if (!host) { 269 dev_err(dev, "failed to find dsi host\n"); 270 return ERR_PTR(-EPROBE_DEFER); 271 } 272 273 dsi = devm_mipi_dsi_device_register_full(dev, host, &info); 274 if (IS_ERR(dsi)) { 275 dev_err(dev, "failed to create dsi device\n"); 276 return dsi; 277 } 278 279 dsi->lanes = 4; 280 dsi->format = MIPI_DSI_FMT_RGB888; 281 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 282 MIPI_DSI_MODE_VIDEO_HSE; 283 284 ret = devm_mipi_dsi_attach(dev, dsi); 285 if (ret < 0) { 286 dev_err(dev, "failed to attach dsi to host\n"); 287 return ERR_PTR(ret); 288 } 289 290 return dsi; 291 } 292 293 static int lt9611uxc_connector_get_modes(struct drm_connector *connector) 294 { 295 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector); 296 unsigned int count; 297 struct edid *edid; 298 299 edid = lt9611uxc->bridge.funcs->get_edid(<9611uxc->bridge, connector); 300 drm_connector_update_edid_property(connector, edid); 301 count = drm_add_edid_modes(connector, edid); 302 kfree(edid); 303 304 return count; 305 } 306 307 static enum drm_connector_status lt9611uxc_connector_detect(struct drm_connector *connector, 308 bool force) 309 { 310 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector); 311 312 return lt9611uxc->bridge.funcs->detect(<9611uxc->bridge); 313 } 314 315 static enum drm_mode_status lt9611uxc_connector_mode_valid(struct drm_connector *connector, 316 struct drm_display_mode *mode) 317 { 318 struct lt9611uxc_mode *lt9611uxc_mode = lt9611uxc_find_mode(mode); 319 320 return lt9611uxc_mode ? MODE_OK : MODE_BAD; 321 } 322 323 static const struct drm_connector_helper_funcs lt9611uxc_bridge_connector_helper_funcs = { 324 .get_modes = lt9611uxc_connector_get_modes, 325 .mode_valid = lt9611uxc_connector_mode_valid, 326 }; 327 328 static const struct drm_connector_funcs lt9611uxc_bridge_connector_funcs = { 329 .fill_modes = drm_helper_probe_single_connector_modes, 330 .detect = lt9611uxc_connector_detect, 331 .destroy = drm_connector_cleanup, 332 .reset = drm_atomic_helper_connector_reset, 333 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 334 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 335 }; 336 337 static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc *lt9611uxc) 338 { 339 int ret; 340 341 if (!bridge->encoder) { 342 DRM_ERROR("Parent encoder object not found"); 343 return -ENODEV; 344 } 345 346 lt9611uxc->connector.polled = DRM_CONNECTOR_POLL_HPD; 347 348 drm_connector_helper_add(<9611uxc->connector, 349 <9611uxc_bridge_connector_helper_funcs); 350 ret = drm_connector_init(bridge->dev, <9611uxc->connector, 351 <9611uxc_bridge_connector_funcs, 352 DRM_MODE_CONNECTOR_HDMIA); 353 if (ret) { 354 DRM_ERROR("Failed to initialize connector with drm\n"); 355 return ret; 356 } 357 358 return drm_connector_attach_encoder(<9611uxc->connector, bridge->encoder); 359 } 360 361 static int lt9611uxc_bridge_attach(struct drm_bridge *bridge, 362 enum drm_bridge_attach_flags flags) 363 { 364 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 365 int ret; 366 367 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { 368 ret = lt9611uxc_connector_init(bridge, lt9611uxc); 369 if (ret < 0) 370 return ret; 371 } 372 373 return 0; 374 } 375 376 static enum drm_mode_status 377 lt9611uxc_bridge_mode_valid(struct drm_bridge *bridge, 378 const struct drm_display_info *info, 379 const struct drm_display_mode *mode) 380 { 381 struct lt9611uxc_mode *lt9611uxc_mode; 382 383 lt9611uxc_mode = lt9611uxc_find_mode(mode); 384 385 return lt9611uxc_mode ? MODE_OK : MODE_BAD; 386 } 387 388 static void lt9611uxc_video_setup(struct lt9611uxc *lt9611uxc, 389 const struct drm_display_mode *mode) 390 { 391 u32 h_total, hactive, hsync_len, hfront_porch; 392 u32 v_total, vactive, vsync_len, vfront_porch; 393 394 h_total = mode->htotal; 395 v_total = mode->vtotal; 396 397 hactive = mode->hdisplay; 398 hsync_len = mode->hsync_end - mode->hsync_start; 399 hfront_porch = mode->hsync_start - mode->hdisplay; 400 401 vactive = mode->vdisplay; 402 vsync_len = mode->vsync_end - mode->vsync_start; 403 vfront_porch = mode->vsync_start - mode->vdisplay; 404 405 regmap_write(lt9611uxc->regmap, 0xd00d, (u8)(v_total / 256)); 406 regmap_write(lt9611uxc->regmap, 0xd00e, (u8)(v_total % 256)); 407 408 regmap_write(lt9611uxc->regmap, 0xd00f, (u8)(vactive / 256)); 409 regmap_write(lt9611uxc->regmap, 0xd010, (u8)(vactive % 256)); 410 411 regmap_write(lt9611uxc->regmap, 0xd011, (u8)(h_total / 256)); 412 regmap_write(lt9611uxc->regmap, 0xd012, (u8)(h_total % 256)); 413 414 regmap_write(lt9611uxc->regmap, 0xd013, (u8)(hactive / 256)); 415 regmap_write(lt9611uxc->regmap, 0xd014, (u8)(hactive % 256)); 416 417 regmap_write(lt9611uxc->regmap, 0xd015, (u8)(vsync_len % 256)); 418 419 regmap_update_bits(lt9611uxc->regmap, 0xd016, 0xf, (u8)(hsync_len / 256)); 420 regmap_write(lt9611uxc->regmap, 0xd017, (u8)(hsync_len % 256)); 421 422 regmap_update_bits(lt9611uxc->regmap, 0xd018, 0xf, (u8)(vfront_porch / 256)); 423 regmap_write(lt9611uxc->regmap, 0xd019, (u8)(vfront_porch % 256)); 424 425 regmap_update_bits(lt9611uxc->regmap, 0xd01a, 0xf, (u8)(hfront_porch / 256)); 426 regmap_write(lt9611uxc->regmap, 0xd01b, (u8)(hfront_porch % 256)); 427 } 428 429 static void lt9611uxc_bridge_mode_set(struct drm_bridge *bridge, 430 const struct drm_display_mode *mode, 431 const struct drm_display_mode *adj_mode) 432 { 433 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 434 435 lt9611uxc_lock(lt9611uxc); 436 lt9611uxc_video_setup(lt9611uxc, mode); 437 lt9611uxc_unlock(lt9611uxc); 438 } 439 440 static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *bridge) 441 { 442 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 443 unsigned int reg_val = 0; 444 int ret; 445 bool connected = true; 446 447 lt9611uxc_lock(lt9611uxc); 448 449 if (lt9611uxc->hpd_supported) { 450 ret = regmap_read(lt9611uxc->regmap, 0xb023, ®_val); 451 452 if (ret) 453 dev_err(lt9611uxc->dev, "failed to read hpd status: %d\n", ret); 454 else 455 connected = reg_val & BIT(1); 456 } 457 lt9611uxc->hdmi_connected = connected; 458 459 lt9611uxc_unlock(lt9611uxc); 460 461 return connected ? connector_status_connected : 462 connector_status_disconnected; 463 } 464 465 static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc) 466 { 467 return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read, 468 msecs_to_jiffies(500)); 469 } 470 471 static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) 472 { 473 struct lt9611uxc *lt9611uxc = data; 474 int ret; 475 476 if (len > EDID_BLOCK_SIZE) 477 return -EINVAL; 478 479 if (block >= EDID_NUM_BLOCKS) 480 return -EINVAL; 481 482 lt9611uxc_lock(lt9611uxc); 483 484 regmap_write(lt9611uxc->regmap, 0xb00b, 0x10); 485 486 regmap_write(lt9611uxc->regmap, 0xb00a, block * EDID_BLOCK_SIZE); 487 488 ret = regmap_noinc_read(lt9611uxc->regmap, 0xb0b0, buf, len); 489 if (ret) 490 dev_err(lt9611uxc->dev, "edid read failed: %d\n", ret); 491 492 lt9611uxc_unlock(lt9611uxc); 493 494 return 0; 495 }; 496 497 static struct edid *lt9611uxc_bridge_get_edid(struct drm_bridge *bridge, 498 struct drm_connector *connector) 499 { 500 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 501 int ret; 502 503 ret = lt9611uxc_wait_for_edid(lt9611uxc); 504 if (ret < 0) { 505 dev_err(lt9611uxc->dev, "wait for EDID failed: %d\n", ret); 506 return NULL; 507 } else if (ret == 0) { 508 dev_err(lt9611uxc->dev, "wait for EDID timeout\n"); 509 return NULL; 510 } 511 512 return drm_do_get_edid(connector, lt9611uxc_get_edid_block, lt9611uxc); 513 } 514 515 static const struct drm_bridge_funcs lt9611uxc_bridge_funcs = { 516 .attach = lt9611uxc_bridge_attach, 517 .mode_valid = lt9611uxc_bridge_mode_valid, 518 .mode_set = lt9611uxc_bridge_mode_set, 519 .detect = lt9611uxc_bridge_detect, 520 .get_edid = lt9611uxc_bridge_get_edid, 521 }; 522 523 static int lt9611uxc_parse_dt(struct device *dev, 524 struct lt9611uxc *lt9611uxc) 525 { 526 lt9611uxc->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1); 527 if (!lt9611uxc->dsi0_node) { 528 dev_err(lt9611uxc->dev, "failed to get remote node for primary dsi\n"); 529 return -ENODEV; 530 } 531 532 lt9611uxc->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1); 533 534 return 0; 535 } 536 537 static int lt9611uxc_gpio_init(struct lt9611uxc *lt9611uxc) 538 { 539 struct device *dev = lt9611uxc->dev; 540 541 lt9611uxc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 542 if (IS_ERR(lt9611uxc->reset_gpio)) { 543 dev_err(dev, "failed to acquire reset gpio\n"); 544 return PTR_ERR(lt9611uxc->reset_gpio); 545 } 546 547 lt9611uxc->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW); 548 if (IS_ERR(lt9611uxc->enable_gpio)) { 549 dev_err(dev, "failed to acquire enable gpio\n"); 550 return PTR_ERR(lt9611uxc->enable_gpio); 551 } 552 553 return 0; 554 } 555 556 static int lt9611uxc_read_device_rev(struct lt9611uxc *lt9611uxc) 557 { 558 unsigned int rev0, rev1, rev2; 559 int ret; 560 561 lt9611uxc_lock(lt9611uxc); 562 563 ret = regmap_read(lt9611uxc->regmap, 0x8100, &rev0); 564 ret |= regmap_read(lt9611uxc->regmap, 0x8101, &rev1); 565 ret |= regmap_read(lt9611uxc->regmap, 0x8102, &rev2); 566 if (ret) 567 dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret); 568 else 569 dev_info(lt9611uxc->dev, "LT9611 revision: 0x%02x.%02x.%02x\n", rev0, rev1, rev2); 570 571 lt9611uxc_unlock(lt9611uxc); 572 573 return ret; 574 } 575 576 static int lt9611uxc_read_version(struct lt9611uxc *lt9611uxc) 577 { 578 unsigned int rev; 579 int ret; 580 581 lt9611uxc_lock(lt9611uxc); 582 583 ret = regmap_read(lt9611uxc->regmap, 0xb021, &rev); 584 if (ret) 585 dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret); 586 else 587 dev_info(lt9611uxc->dev, "LT9611 version: 0x%02x\n", rev); 588 589 lt9611uxc_unlock(lt9611uxc); 590 591 return ret < 0 ? ret : rev; 592 } 593 594 static int lt9611uxc_hdmi_hw_params(struct device *dev, void *data, 595 struct hdmi_codec_daifmt *fmt, 596 struct hdmi_codec_params *hparms) 597 { 598 /* 599 * LT9611UXC will automatically detect rate and sample size, so no need 600 * to setup anything here. 601 */ 602 return 0; 603 } 604 605 static void lt9611uxc_audio_shutdown(struct device *dev, void *data) 606 { 607 } 608 609 static int lt9611uxc_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 610 struct device_node *endpoint) 611 { 612 struct of_endpoint of_ep; 613 int ret; 614 615 ret = of_graph_parse_endpoint(endpoint, &of_ep); 616 if (ret < 0) 617 return ret; 618 619 /* 620 * HDMI sound should be located as reg = <2> 621 * Then, it is sound port 0 622 */ 623 if (of_ep.port == 2) 624 return 0; 625 626 return -EINVAL; 627 } 628 629 static const struct hdmi_codec_ops lt9611uxc_codec_ops = { 630 .hw_params = lt9611uxc_hdmi_hw_params, 631 .audio_shutdown = lt9611uxc_audio_shutdown, 632 .get_dai_id = lt9611uxc_hdmi_i2s_get_dai_id, 633 }; 634 635 static int lt9611uxc_audio_init(struct device *dev, struct lt9611uxc *lt9611uxc) 636 { 637 struct hdmi_codec_pdata codec_data = { 638 .ops = <9611uxc_codec_ops, 639 .max_i2s_channels = 2, 640 .i2s = 1, 641 .data = lt9611uxc, 642 }; 643 644 lt9611uxc->audio_pdev = 645 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, 646 PLATFORM_DEVID_AUTO, 647 &codec_data, sizeof(codec_data)); 648 649 return PTR_ERR_OR_ZERO(lt9611uxc->audio_pdev); 650 } 651 652 static void lt9611uxc_audio_exit(struct lt9611uxc *lt9611uxc) 653 { 654 if (lt9611uxc->audio_pdev) { 655 platform_device_unregister(lt9611uxc->audio_pdev); 656 lt9611uxc->audio_pdev = NULL; 657 } 658 } 659 660 #define LT9611UXC_FW_PAGE_SIZE 32 661 static void lt9611uxc_firmware_write_page(struct lt9611uxc *lt9611uxc, u16 addr, const u8 *buf) 662 { 663 struct reg_sequence seq_write_prepare[] = { 664 REG_SEQ0(0x805a, 0x04), 665 REG_SEQ0(0x805a, 0x00), 666 667 REG_SEQ0(0x805e, 0xdf), 668 REG_SEQ0(0x805a, 0x20), 669 REG_SEQ0(0x805a, 0x00), 670 REG_SEQ0(0x8058, 0x21), 671 }; 672 673 struct reg_sequence seq_write_addr[] = { 674 REG_SEQ0(0x805b, (addr >> 16) & 0xff), 675 REG_SEQ0(0x805c, (addr >> 8) & 0xff), 676 REG_SEQ0(0x805d, addr & 0xff), 677 REG_SEQ0(0x805a, 0x10), 678 REG_SEQ0(0x805a, 0x00), 679 }; 680 681 regmap_write(lt9611uxc->regmap, 0x8108, 0xbf); 682 msleep(20); 683 regmap_write(lt9611uxc->regmap, 0x8108, 0xff); 684 msleep(20); 685 regmap_multi_reg_write(lt9611uxc->regmap, seq_write_prepare, ARRAY_SIZE(seq_write_prepare)); 686 regmap_noinc_write(lt9611uxc->regmap, 0x8059, buf, LT9611UXC_FW_PAGE_SIZE); 687 regmap_multi_reg_write(lt9611uxc->regmap, seq_write_addr, ARRAY_SIZE(seq_write_addr)); 688 msleep(20); 689 } 690 691 static void lt9611uxc_firmware_read_page(struct lt9611uxc *lt9611uxc, u16 addr, char *buf) 692 { 693 struct reg_sequence seq_read_page[] = { 694 REG_SEQ0(0x805a, 0xa0), 695 REG_SEQ0(0x805a, 0x80), 696 REG_SEQ0(0x805b, (addr >> 16) & 0xff), 697 REG_SEQ0(0x805c, (addr >> 8) & 0xff), 698 REG_SEQ0(0x805d, addr & 0xff), 699 REG_SEQ0(0x805a, 0x90), 700 REG_SEQ0(0x805a, 0x80), 701 REG_SEQ0(0x8058, 0x21), 702 }; 703 704 regmap_multi_reg_write(lt9611uxc->regmap, seq_read_page, ARRAY_SIZE(seq_read_page)); 705 regmap_noinc_read(lt9611uxc->regmap, 0x805f, buf, LT9611UXC_FW_PAGE_SIZE); 706 } 707 708 static char *lt9611uxc_firmware_read(struct lt9611uxc *lt9611uxc, size_t size) 709 { 710 struct reg_sequence seq_read_setup[] = { 711 REG_SEQ0(0x805a, 0x84), 712 REG_SEQ0(0x805a, 0x80), 713 }; 714 715 char *readbuf; 716 u16 offset; 717 718 readbuf = kzalloc(ALIGN(size, 32), GFP_KERNEL); 719 if (!readbuf) 720 return NULL; 721 722 regmap_multi_reg_write(lt9611uxc->regmap, seq_read_setup, ARRAY_SIZE(seq_read_setup)); 723 724 for (offset = 0; 725 offset < size; 726 offset += LT9611UXC_FW_PAGE_SIZE) 727 lt9611uxc_firmware_read_page(lt9611uxc, offset, &readbuf[offset]); 728 729 return readbuf; 730 } 731 732 static int lt9611uxc_firmware_update(struct lt9611uxc *lt9611uxc) 733 { 734 int ret; 735 u16 offset; 736 size_t remain; 737 char *readbuf; 738 const struct firmware *fw; 739 740 struct reg_sequence seq_setup[] = { 741 REG_SEQ0(0x805e, 0xdf), 742 REG_SEQ0(0x8058, 0x00), 743 REG_SEQ0(0x8059, 0x50), 744 REG_SEQ0(0x805a, 0x10), 745 REG_SEQ0(0x805a, 0x00), 746 }; 747 748 749 struct reg_sequence seq_block_erase[] = { 750 REG_SEQ0(0x805a, 0x04), 751 REG_SEQ0(0x805a, 0x00), 752 REG_SEQ0(0x805b, 0x00), 753 REG_SEQ0(0x805c, 0x00), 754 REG_SEQ0(0x805d, 0x00), 755 REG_SEQ0(0x805a, 0x01), 756 REG_SEQ0(0x805a, 0x00), 757 }; 758 759 ret = request_firmware(&fw, FW_FILE, lt9611uxc->dev); 760 if (ret < 0) 761 return ret; 762 763 dev_info(lt9611uxc->dev, "Updating firmware\n"); 764 lt9611uxc_lock(lt9611uxc); 765 766 regmap_multi_reg_write(lt9611uxc->regmap, seq_setup, ARRAY_SIZE(seq_setup)); 767 768 /* 769 * Need erase block 2 timess here. Sometimes, block erase can fail. 770 * This is a workaroud. 771 */ 772 regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase)); 773 msleep(3000); 774 regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase)); 775 msleep(3000); 776 777 for (offset = 0, remain = fw->size; 778 remain >= LT9611UXC_FW_PAGE_SIZE; 779 offset += LT9611UXC_FW_PAGE_SIZE, remain -= LT9611UXC_FW_PAGE_SIZE) 780 lt9611uxc_firmware_write_page(lt9611uxc, offset, fw->data + offset); 781 782 if (remain > 0) { 783 char buf[LT9611UXC_FW_PAGE_SIZE]; 784 785 memset(buf, 0xff, LT9611UXC_FW_PAGE_SIZE); 786 memcpy(buf, fw->data + offset, remain); 787 lt9611uxc_firmware_write_page(lt9611uxc, offset, buf); 788 } 789 msleep(20); 790 791 readbuf = lt9611uxc_firmware_read(lt9611uxc, fw->size); 792 if (!readbuf) { 793 ret = -ENOMEM; 794 goto out; 795 } 796 797 if (!memcmp(readbuf, fw->data, fw->size)) { 798 dev_err(lt9611uxc->dev, "Firmware update failed\n"); 799 print_hex_dump(KERN_ERR, "fw: ", DUMP_PREFIX_OFFSET, 16, 1, readbuf, fw->size, false); 800 ret = -EINVAL; 801 } else { 802 dev_info(lt9611uxc->dev, "Firmware updates successfully\n"); 803 ret = 0; 804 } 805 kfree(readbuf); 806 807 out: 808 lt9611uxc_unlock(lt9611uxc); 809 lt9611uxc_reset(lt9611uxc); 810 release_firmware(fw); 811 812 return ret; 813 } 814 815 static ssize_t lt9611uxc_firmware_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) 816 { 817 struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev); 818 int ret; 819 820 ret = lt9611uxc_firmware_update(lt9611uxc); 821 if (ret < 0) 822 return ret; 823 return len; 824 } 825 826 static ssize_t lt9611uxc_firmware_show(struct device *dev, struct device_attribute *attr, char *buf) 827 { 828 struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev); 829 830 return sysfs_emit(buf, "%02x\n", lt9611uxc->fw_version); 831 } 832 833 static DEVICE_ATTR_RW(lt9611uxc_firmware); 834 835 static struct attribute *lt9611uxc_attrs[] = { 836 &dev_attr_lt9611uxc_firmware.attr, 837 NULL, 838 }; 839 840 static const struct attribute_group lt9611uxc_attr_group = { 841 .attrs = lt9611uxc_attrs, 842 }; 843 844 static const struct attribute_group *lt9611uxc_attr_groups[] = { 845 <9611uxc_attr_group, 846 NULL, 847 }; 848 849 static int lt9611uxc_probe(struct i2c_client *client) 850 { 851 struct lt9611uxc *lt9611uxc; 852 struct device *dev = &client->dev; 853 int ret; 854 bool fw_updated = false; 855 856 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 857 dev_err(dev, "device doesn't support I2C\n"); 858 return -ENODEV; 859 } 860 861 lt9611uxc = devm_kzalloc(dev, sizeof(*lt9611uxc), GFP_KERNEL); 862 if (!lt9611uxc) 863 return -ENOMEM; 864 865 lt9611uxc->dev = dev; 866 lt9611uxc->client = client; 867 mutex_init(<9611uxc->ocm_lock); 868 869 lt9611uxc->regmap = devm_regmap_init_i2c(client, <9611uxc_regmap_config); 870 if (IS_ERR(lt9611uxc->regmap)) { 871 dev_err(lt9611uxc->dev, "regmap i2c init failed\n"); 872 return PTR_ERR(lt9611uxc->regmap); 873 } 874 875 ret = lt9611uxc_parse_dt(dev, lt9611uxc); 876 if (ret) { 877 dev_err(dev, "failed to parse device tree\n"); 878 return ret; 879 } 880 881 ret = lt9611uxc_gpio_init(lt9611uxc); 882 if (ret < 0) 883 goto err_of_put; 884 885 ret = lt9611uxc_regulator_init(lt9611uxc); 886 if (ret < 0) 887 goto err_of_put; 888 889 lt9611uxc_assert_5v(lt9611uxc); 890 891 ret = lt9611uxc_regulator_enable(lt9611uxc); 892 if (ret) 893 goto err_of_put; 894 895 lt9611uxc_reset(lt9611uxc); 896 897 ret = lt9611uxc_read_device_rev(lt9611uxc); 898 if (ret) { 899 dev_err(dev, "failed to read chip rev\n"); 900 goto err_disable_regulators; 901 } 902 903 retry: 904 ret = lt9611uxc_read_version(lt9611uxc); 905 if (ret < 0) { 906 dev_err(dev, "failed to read FW version\n"); 907 goto err_disable_regulators; 908 } else if (ret == 0) { 909 if (!fw_updated) { 910 fw_updated = true; 911 dev_err(dev, "FW version 0, enforcing firmware update\n"); 912 ret = lt9611uxc_firmware_update(lt9611uxc); 913 if (ret < 0) 914 goto err_disable_regulators; 915 else 916 goto retry; 917 } else { 918 dev_err(dev, "FW version 0, update failed\n"); 919 ret = -EOPNOTSUPP; 920 goto err_disable_regulators; 921 } 922 } else if (ret < 0x40) { 923 dev_info(dev, "FW version 0x%x, HPD not supported\n", ret); 924 } else { 925 lt9611uxc->hpd_supported = true; 926 } 927 lt9611uxc->fw_version = ret; 928 929 init_waitqueue_head(<9611uxc->wq); 930 INIT_WORK(<9611uxc->work, lt9611uxc_hpd_work); 931 932 ret = devm_request_threaded_irq(dev, client->irq, NULL, 933 lt9611uxc_irq_thread_handler, 934 IRQF_ONESHOT, "lt9611uxc", lt9611uxc); 935 if (ret) { 936 dev_err(dev, "failed to request irq\n"); 937 goto err_disable_regulators; 938 } 939 940 i2c_set_clientdata(client, lt9611uxc); 941 942 lt9611uxc->bridge.funcs = <9611uxc_bridge_funcs; 943 lt9611uxc->bridge.of_node = client->dev.of_node; 944 lt9611uxc->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID; 945 if (lt9611uxc->hpd_supported) 946 lt9611uxc->bridge.ops |= DRM_BRIDGE_OP_HPD; 947 lt9611uxc->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 948 949 drm_bridge_add(<9611uxc->bridge); 950 951 /* Attach primary DSI */ 952 lt9611uxc->dsi0 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi0_node); 953 if (IS_ERR(lt9611uxc->dsi0)) { 954 ret = PTR_ERR(lt9611uxc->dsi0); 955 goto err_remove_bridge; 956 } 957 958 /* Attach secondary DSI, if specified */ 959 if (lt9611uxc->dsi1_node) { 960 lt9611uxc->dsi1 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi1_node); 961 if (IS_ERR(lt9611uxc->dsi1)) { 962 ret = PTR_ERR(lt9611uxc->dsi1); 963 goto err_remove_bridge; 964 } 965 } 966 967 return lt9611uxc_audio_init(dev, lt9611uxc); 968 969 err_remove_bridge: 970 drm_bridge_remove(<9611uxc->bridge); 971 972 err_disable_regulators: 973 regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies); 974 975 err_of_put: 976 of_node_put(lt9611uxc->dsi1_node); 977 of_node_put(lt9611uxc->dsi0_node); 978 979 return ret; 980 } 981 982 static void lt9611uxc_remove(struct i2c_client *client) 983 { 984 struct lt9611uxc *lt9611uxc = i2c_get_clientdata(client); 985 986 disable_irq(client->irq); 987 cancel_work_sync(<9611uxc->work); 988 lt9611uxc_audio_exit(lt9611uxc); 989 drm_bridge_remove(<9611uxc->bridge); 990 991 mutex_destroy(<9611uxc->ocm_lock); 992 993 regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies); 994 995 of_node_put(lt9611uxc->dsi1_node); 996 of_node_put(lt9611uxc->dsi0_node); 997 } 998 999 static struct i2c_device_id lt9611uxc_id[] = { 1000 { "lontium,lt9611uxc", 0 }, 1001 { /* sentinel */ } 1002 }; 1003 1004 static const struct of_device_id lt9611uxc_match_table[] = { 1005 { .compatible = "lontium,lt9611uxc" }, 1006 { /* sentinel */ } 1007 }; 1008 MODULE_DEVICE_TABLE(of, lt9611uxc_match_table); 1009 1010 static struct i2c_driver lt9611uxc_driver = { 1011 .driver = { 1012 .name = "lt9611uxc", 1013 .of_match_table = lt9611uxc_match_table, 1014 .dev_groups = lt9611uxc_attr_groups, 1015 }, 1016 .probe = lt9611uxc_probe, 1017 .remove = lt9611uxc_remove, 1018 .id_table = lt9611uxc_id, 1019 }; 1020 module_i2c_driver(lt9611uxc_driver); 1021 1022 MODULE_AUTHOR("Dmitry Baryshkov <dmitry.baryshkov@linaro.org>"); 1023 MODULE_LICENSE("GPL v2"); 1024 1025 MODULE_FIRMWARE(FW_FILE); 1026