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 return ERR_PTR(dev_err_probe(dev, -EPROBE_DEFER, "failed to find dsi host\n")); 270 271 dsi = devm_mipi_dsi_device_register_full(dev, host, &info); 272 if (IS_ERR(dsi)) { 273 dev_err(dev, "failed to create dsi device\n"); 274 return dsi; 275 } 276 277 dsi->lanes = 4; 278 dsi->format = MIPI_DSI_FMT_RGB888; 279 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 280 MIPI_DSI_MODE_VIDEO_HSE; 281 282 ret = devm_mipi_dsi_attach(dev, dsi); 283 if (ret < 0) { 284 dev_err(dev, "failed to attach dsi to host\n"); 285 return ERR_PTR(ret); 286 } 287 288 return dsi; 289 } 290 291 static int lt9611uxc_connector_get_modes(struct drm_connector *connector) 292 { 293 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector); 294 unsigned int count; 295 struct edid *edid; 296 297 edid = lt9611uxc->bridge.funcs->get_edid(<9611uxc->bridge, connector); 298 drm_connector_update_edid_property(connector, edid); 299 count = drm_add_edid_modes(connector, edid); 300 kfree(edid); 301 302 return count; 303 } 304 305 static enum drm_connector_status lt9611uxc_connector_detect(struct drm_connector *connector, 306 bool force) 307 { 308 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector); 309 310 return lt9611uxc->bridge.funcs->detect(<9611uxc->bridge); 311 } 312 313 static enum drm_mode_status lt9611uxc_connector_mode_valid(struct drm_connector *connector, 314 struct drm_display_mode *mode) 315 { 316 struct lt9611uxc_mode *lt9611uxc_mode = lt9611uxc_find_mode(mode); 317 318 return lt9611uxc_mode ? MODE_OK : MODE_BAD; 319 } 320 321 static const struct drm_connector_helper_funcs lt9611uxc_bridge_connector_helper_funcs = { 322 .get_modes = lt9611uxc_connector_get_modes, 323 .mode_valid = lt9611uxc_connector_mode_valid, 324 }; 325 326 static const struct drm_connector_funcs lt9611uxc_bridge_connector_funcs = { 327 .fill_modes = drm_helper_probe_single_connector_modes, 328 .detect = lt9611uxc_connector_detect, 329 .destroy = drm_connector_cleanup, 330 .reset = drm_atomic_helper_connector_reset, 331 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 332 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 333 }; 334 335 static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc *lt9611uxc) 336 { 337 int ret; 338 339 if (!bridge->encoder) { 340 DRM_ERROR("Parent encoder object not found"); 341 return -ENODEV; 342 } 343 344 lt9611uxc->connector.polled = DRM_CONNECTOR_POLL_HPD; 345 346 drm_connector_helper_add(<9611uxc->connector, 347 <9611uxc_bridge_connector_helper_funcs); 348 ret = drm_connector_init(bridge->dev, <9611uxc->connector, 349 <9611uxc_bridge_connector_funcs, 350 DRM_MODE_CONNECTOR_HDMIA); 351 if (ret) { 352 DRM_ERROR("Failed to initialize connector with drm\n"); 353 return ret; 354 } 355 356 return drm_connector_attach_encoder(<9611uxc->connector, bridge->encoder); 357 } 358 359 static int lt9611uxc_bridge_attach(struct drm_bridge *bridge, 360 enum drm_bridge_attach_flags flags) 361 { 362 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 363 int ret; 364 365 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { 366 ret = lt9611uxc_connector_init(bridge, lt9611uxc); 367 if (ret < 0) 368 return ret; 369 } 370 371 return 0; 372 } 373 374 static enum drm_mode_status 375 lt9611uxc_bridge_mode_valid(struct drm_bridge *bridge, 376 const struct drm_display_info *info, 377 const struct drm_display_mode *mode) 378 { 379 struct lt9611uxc_mode *lt9611uxc_mode; 380 381 lt9611uxc_mode = lt9611uxc_find_mode(mode); 382 383 return lt9611uxc_mode ? MODE_OK : MODE_BAD; 384 } 385 386 static void lt9611uxc_video_setup(struct lt9611uxc *lt9611uxc, 387 const struct drm_display_mode *mode) 388 { 389 u32 h_total, hactive, hsync_len, hfront_porch; 390 u32 v_total, vactive, vsync_len, vfront_porch; 391 392 h_total = mode->htotal; 393 v_total = mode->vtotal; 394 395 hactive = mode->hdisplay; 396 hsync_len = mode->hsync_end - mode->hsync_start; 397 hfront_porch = mode->hsync_start - mode->hdisplay; 398 399 vactive = mode->vdisplay; 400 vsync_len = mode->vsync_end - mode->vsync_start; 401 vfront_porch = mode->vsync_start - mode->vdisplay; 402 403 regmap_write(lt9611uxc->regmap, 0xd00d, (u8)(v_total / 256)); 404 regmap_write(lt9611uxc->regmap, 0xd00e, (u8)(v_total % 256)); 405 406 regmap_write(lt9611uxc->regmap, 0xd00f, (u8)(vactive / 256)); 407 regmap_write(lt9611uxc->regmap, 0xd010, (u8)(vactive % 256)); 408 409 regmap_write(lt9611uxc->regmap, 0xd011, (u8)(h_total / 256)); 410 regmap_write(lt9611uxc->regmap, 0xd012, (u8)(h_total % 256)); 411 412 regmap_write(lt9611uxc->regmap, 0xd013, (u8)(hactive / 256)); 413 regmap_write(lt9611uxc->regmap, 0xd014, (u8)(hactive % 256)); 414 415 regmap_write(lt9611uxc->regmap, 0xd015, (u8)(vsync_len % 256)); 416 417 regmap_update_bits(lt9611uxc->regmap, 0xd016, 0xf, (u8)(hsync_len / 256)); 418 regmap_write(lt9611uxc->regmap, 0xd017, (u8)(hsync_len % 256)); 419 420 regmap_update_bits(lt9611uxc->regmap, 0xd018, 0xf, (u8)(vfront_porch / 256)); 421 regmap_write(lt9611uxc->regmap, 0xd019, (u8)(vfront_porch % 256)); 422 423 regmap_update_bits(lt9611uxc->regmap, 0xd01a, 0xf, (u8)(hfront_porch / 256)); 424 regmap_write(lt9611uxc->regmap, 0xd01b, (u8)(hfront_porch % 256)); 425 } 426 427 static void lt9611uxc_bridge_mode_set(struct drm_bridge *bridge, 428 const struct drm_display_mode *mode, 429 const struct drm_display_mode *adj_mode) 430 { 431 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 432 433 lt9611uxc_lock(lt9611uxc); 434 lt9611uxc_video_setup(lt9611uxc, mode); 435 lt9611uxc_unlock(lt9611uxc); 436 } 437 438 static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *bridge) 439 { 440 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 441 unsigned int reg_val = 0; 442 int ret; 443 bool connected = true; 444 445 lt9611uxc_lock(lt9611uxc); 446 447 if (lt9611uxc->hpd_supported) { 448 ret = regmap_read(lt9611uxc->regmap, 0xb023, ®_val); 449 450 if (ret) 451 dev_err(lt9611uxc->dev, "failed to read hpd status: %d\n", ret); 452 else 453 connected = reg_val & BIT(1); 454 } 455 lt9611uxc->hdmi_connected = connected; 456 457 lt9611uxc_unlock(lt9611uxc); 458 459 return connected ? connector_status_connected : 460 connector_status_disconnected; 461 } 462 463 static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc) 464 { 465 return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read, 466 msecs_to_jiffies(500)); 467 } 468 469 static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) 470 { 471 struct lt9611uxc *lt9611uxc = data; 472 int ret; 473 474 if (len > EDID_BLOCK_SIZE) 475 return -EINVAL; 476 477 if (block >= EDID_NUM_BLOCKS) 478 return -EINVAL; 479 480 lt9611uxc_lock(lt9611uxc); 481 482 regmap_write(lt9611uxc->regmap, 0xb00b, 0x10); 483 484 regmap_write(lt9611uxc->regmap, 0xb00a, block * EDID_BLOCK_SIZE); 485 486 ret = regmap_noinc_read(lt9611uxc->regmap, 0xb0b0, buf, len); 487 if (ret) 488 dev_err(lt9611uxc->dev, "edid read failed: %d\n", ret); 489 490 lt9611uxc_unlock(lt9611uxc); 491 492 return 0; 493 }; 494 495 static struct edid *lt9611uxc_bridge_get_edid(struct drm_bridge *bridge, 496 struct drm_connector *connector) 497 { 498 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 499 int ret; 500 501 ret = lt9611uxc_wait_for_edid(lt9611uxc); 502 if (ret < 0) { 503 dev_err(lt9611uxc->dev, "wait for EDID failed: %d\n", ret); 504 return NULL; 505 } else if (ret == 0) { 506 dev_err(lt9611uxc->dev, "wait for EDID timeout\n"); 507 return NULL; 508 } 509 510 return drm_do_get_edid(connector, lt9611uxc_get_edid_block, lt9611uxc); 511 } 512 513 static const struct drm_bridge_funcs lt9611uxc_bridge_funcs = { 514 .attach = lt9611uxc_bridge_attach, 515 .mode_valid = lt9611uxc_bridge_mode_valid, 516 .mode_set = lt9611uxc_bridge_mode_set, 517 .detect = lt9611uxc_bridge_detect, 518 .get_edid = lt9611uxc_bridge_get_edid, 519 }; 520 521 static int lt9611uxc_parse_dt(struct device *dev, 522 struct lt9611uxc *lt9611uxc) 523 { 524 lt9611uxc->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1); 525 if (!lt9611uxc->dsi0_node) { 526 dev_err(lt9611uxc->dev, "failed to get remote node for primary dsi\n"); 527 return -ENODEV; 528 } 529 530 lt9611uxc->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1); 531 532 return 0; 533 } 534 535 static int lt9611uxc_gpio_init(struct lt9611uxc *lt9611uxc) 536 { 537 struct device *dev = lt9611uxc->dev; 538 539 lt9611uxc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 540 if (IS_ERR(lt9611uxc->reset_gpio)) { 541 dev_err(dev, "failed to acquire reset gpio\n"); 542 return PTR_ERR(lt9611uxc->reset_gpio); 543 } 544 545 lt9611uxc->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW); 546 if (IS_ERR(lt9611uxc->enable_gpio)) { 547 dev_err(dev, "failed to acquire enable gpio\n"); 548 return PTR_ERR(lt9611uxc->enable_gpio); 549 } 550 551 return 0; 552 } 553 554 static int lt9611uxc_read_device_rev(struct lt9611uxc *lt9611uxc) 555 { 556 unsigned int rev0, rev1, rev2; 557 int ret; 558 559 lt9611uxc_lock(lt9611uxc); 560 561 ret = regmap_read(lt9611uxc->regmap, 0x8100, &rev0); 562 ret |= regmap_read(lt9611uxc->regmap, 0x8101, &rev1); 563 ret |= regmap_read(lt9611uxc->regmap, 0x8102, &rev2); 564 if (ret) 565 dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret); 566 else 567 dev_info(lt9611uxc->dev, "LT9611 revision: 0x%02x.%02x.%02x\n", rev0, rev1, rev2); 568 569 lt9611uxc_unlock(lt9611uxc); 570 571 return ret; 572 } 573 574 static int lt9611uxc_read_version(struct lt9611uxc *lt9611uxc) 575 { 576 unsigned int rev; 577 int ret; 578 579 lt9611uxc_lock(lt9611uxc); 580 581 ret = regmap_read(lt9611uxc->regmap, 0xb021, &rev); 582 if (ret) 583 dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret); 584 else 585 dev_info(lt9611uxc->dev, "LT9611 version: 0x%02x\n", rev); 586 587 lt9611uxc_unlock(lt9611uxc); 588 589 return ret < 0 ? ret : rev; 590 } 591 592 static int lt9611uxc_hdmi_hw_params(struct device *dev, void *data, 593 struct hdmi_codec_daifmt *fmt, 594 struct hdmi_codec_params *hparms) 595 { 596 /* 597 * LT9611UXC will automatically detect rate and sample size, so no need 598 * to setup anything here. 599 */ 600 return 0; 601 } 602 603 static void lt9611uxc_audio_shutdown(struct device *dev, void *data) 604 { 605 } 606 607 static int lt9611uxc_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 608 struct device_node *endpoint) 609 { 610 struct of_endpoint of_ep; 611 int ret; 612 613 ret = of_graph_parse_endpoint(endpoint, &of_ep); 614 if (ret < 0) 615 return ret; 616 617 /* 618 * HDMI sound should be located as reg = <2> 619 * Then, it is sound port 0 620 */ 621 if (of_ep.port == 2) 622 return 0; 623 624 return -EINVAL; 625 } 626 627 static const struct hdmi_codec_ops lt9611uxc_codec_ops = { 628 .hw_params = lt9611uxc_hdmi_hw_params, 629 .audio_shutdown = lt9611uxc_audio_shutdown, 630 .get_dai_id = lt9611uxc_hdmi_i2s_get_dai_id, 631 }; 632 633 static int lt9611uxc_audio_init(struct device *dev, struct lt9611uxc *lt9611uxc) 634 { 635 struct hdmi_codec_pdata codec_data = { 636 .ops = <9611uxc_codec_ops, 637 .max_i2s_channels = 2, 638 .i2s = 1, 639 .data = lt9611uxc, 640 }; 641 642 lt9611uxc->audio_pdev = 643 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME, 644 PLATFORM_DEVID_AUTO, 645 &codec_data, sizeof(codec_data)); 646 647 return PTR_ERR_OR_ZERO(lt9611uxc->audio_pdev); 648 } 649 650 static void lt9611uxc_audio_exit(struct lt9611uxc *lt9611uxc) 651 { 652 if (lt9611uxc->audio_pdev) { 653 platform_device_unregister(lt9611uxc->audio_pdev); 654 lt9611uxc->audio_pdev = NULL; 655 } 656 } 657 658 #define LT9611UXC_FW_PAGE_SIZE 32 659 static void lt9611uxc_firmware_write_page(struct lt9611uxc *lt9611uxc, u16 addr, const u8 *buf) 660 { 661 struct reg_sequence seq_write_prepare[] = { 662 REG_SEQ0(0x805a, 0x04), 663 REG_SEQ0(0x805a, 0x00), 664 665 REG_SEQ0(0x805e, 0xdf), 666 REG_SEQ0(0x805a, 0x20), 667 REG_SEQ0(0x805a, 0x00), 668 REG_SEQ0(0x8058, 0x21), 669 }; 670 671 struct reg_sequence seq_write_addr[] = { 672 REG_SEQ0(0x805b, (addr >> 16) & 0xff), 673 REG_SEQ0(0x805c, (addr >> 8) & 0xff), 674 REG_SEQ0(0x805d, addr & 0xff), 675 REG_SEQ0(0x805a, 0x10), 676 REG_SEQ0(0x805a, 0x00), 677 }; 678 679 regmap_write(lt9611uxc->regmap, 0x8108, 0xbf); 680 msleep(20); 681 regmap_write(lt9611uxc->regmap, 0x8108, 0xff); 682 msleep(20); 683 regmap_multi_reg_write(lt9611uxc->regmap, seq_write_prepare, ARRAY_SIZE(seq_write_prepare)); 684 regmap_noinc_write(lt9611uxc->regmap, 0x8059, buf, LT9611UXC_FW_PAGE_SIZE); 685 regmap_multi_reg_write(lt9611uxc->regmap, seq_write_addr, ARRAY_SIZE(seq_write_addr)); 686 msleep(20); 687 } 688 689 static void lt9611uxc_firmware_read_page(struct lt9611uxc *lt9611uxc, u16 addr, char *buf) 690 { 691 struct reg_sequence seq_read_page[] = { 692 REG_SEQ0(0x805a, 0xa0), 693 REG_SEQ0(0x805a, 0x80), 694 REG_SEQ0(0x805b, (addr >> 16) & 0xff), 695 REG_SEQ0(0x805c, (addr >> 8) & 0xff), 696 REG_SEQ0(0x805d, addr & 0xff), 697 REG_SEQ0(0x805a, 0x90), 698 REG_SEQ0(0x805a, 0x80), 699 REG_SEQ0(0x8058, 0x21), 700 }; 701 702 regmap_multi_reg_write(lt9611uxc->regmap, seq_read_page, ARRAY_SIZE(seq_read_page)); 703 regmap_noinc_read(lt9611uxc->regmap, 0x805f, buf, LT9611UXC_FW_PAGE_SIZE); 704 } 705 706 static char *lt9611uxc_firmware_read(struct lt9611uxc *lt9611uxc, size_t size) 707 { 708 struct reg_sequence seq_read_setup[] = { 709 REG_SEQ0(0x805a, 0x84), 710 REG_SEQ0(0x805a, 0x80), 711 }; 712 713 char *readbuf; 714 u16 offset; 715 716 readbuf = kzalloc(ALIGN(size, 32), GFP_KERNEL); 717 if (!readbuf) 718 return NULL; 719 720 regmap_multi_reg_write(lt9611uxc->regmap, seq_read_setup, ARRAY_SIZE(seq_read_setup)); 721 722 for (offset = 0; 723 offset < size; 724 offset += LT9611UXC_FW_PAGE_SIZE) 725 lt9611uxc_firmware_read_page(lt9611uxc, offset, &readbuf[offset]); 726 727 return readbuf; 728 } 729 730 static int lt9611uxc_firmware_update(struct lt9611uxc *lt9611uxc) 731 { 732 int ret; 733 u16 offset; 734 size_t remain; 735 char *readbuf; 736 const struct firmware *fw; 737 738 struct reg_sequence seq_setup[] = { 739 REG_SEQ0(0x805e, 0xdf), 740 REG_SEQ0(0x8058, 0x00), 741 REG_SEQ0(0x8059, 0x50), 742 REG_SEQ0(0x805a, 0x10), 743 REG_SEQ0(0x805a, 0x00), 744 }; 745 746 747 struct reg_sequence seq_block_erase[] = { 748 REG_SEQ0(0x805a, 0x04), 749 REG_SEQ0(0x805a, 0x00), 750 REG_SEQ0(0x805b, 0x00), 751 REG_SEQ0(0x805c, 0x00), 752 REG_SEQ0(0x805d, 0x00), 753 REG_SEQ0(0x805a, 0x01), 754 REG_SEQ0(0x805a, 0x00), 755 }; 756 757 ret = request_firmware(&fw, FW_FILE, lt9611uxc->dev); 758 if (ret < 0) 759 return ret; 760 761 dev_info(lt9611uxc->dev, "Updating firmware\n"); 762 lt9611uxc_lock(lt9611uxc); 763 764 regmap_multi_reg_write(lt9611uxc->regmap, seq_setup, ARRAY_SIZE(seq_setup)); 765 766 /* 767 * Need erase block 2 timess here. Sometimes, block erase can fail. 768 * This is a workaroud. 769 */ 770 regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase)); 771 msleep(3000); 772 regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase)); 773 msleep(3000); 774 775 for (offset = 0, remain = fw->size; 776 remain >= LT9611UXC_FW_PAGE_SIZE; 777 offset += LT9611UXC_FW_PAGE_SIZE, remain -= LT9611UXC_FW_PAGE_SIZE) 778 lt9611uxc_firmware_write_page(lt9611uxc, offset, fw->data + offset); 779 780 if (remain > 0) { 781 char buf[LT9611UXC_FW_PAGE_SIZE]; 782 783 memset(buf, 0xff, LT9611UXC_FW_PAGE_SIZE); 784 memcpy(buf, fw->data + offset, remain); 785 lt9611uxc_firmware_write_page(lt9611uxc, offset, buf); 786 } 787 msleep(20); 788 789 readbuf = lt9611uxc_firmware_read(lt9611uxc, fw->size); 790 if (!readbuf) { 791 ret = -ENOMEM; 792 goto out; 793 } 794 795 if (!memcmp(readbuf, fw->data, fw->size)) { 796 dev_err(lt9611uxc->dev, "Firmware update failed\n"); 797 print_hex_dump(KERN_ERR, "fw: ", DUMP_PREFIX_OFFSET, 16, 1, readbuf, fw->size, false); 798 ret = -EINVAL; 799 } else { 800 dev_info(lt9611uxc->dev, "Firmware updates successfully\n"); 801 ret = 0; 802 } 803 kfree(readbuf); 804 805 out: 806 lt9611uxc_unlock(lt9611uxc); 807 lt9611uxc_reset(lt9611uxc); 808 release_firmware(fw); 809 810 return ret; 811 } 812 813 static ssize_t lt9611uxc_firmware_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) 814 { 815 struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev); 816 int ret; 817 818 ret = lt9611uxc_firmware_update(lt9611uxc); 819 if (ret < 0) 820 return ret; 821 return len; 822 } 823 824 static ssize_t lt9611uxc_firmware_show(struct device *dev, struct device_attribute *attr, char *buf) 825 { 826 struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev); 827 828 return sysfs_emit(buf, "%02x\n", lt9611uxc->fw_version); 829 } 830 831 static DEVICE_ATTR_RW(lt9611uxc_firmware); 832 833 static struct attribute *lt9611uxc_attrs[] = { 834 &dev_attr_lt9611uxc_firmware.attr, 835 NULL, 836 }; 837 838 static const struct attribute_group lt9611uxc_attr_group = { 839 .attrs = lt9611uxc_attrs, 840 }; 841 842 static const struct attribute_group *lt9611uxc_attr_groups[] = { 843 <9611uxc_attr_group, 844 NULL, 845 }; 846 847 static int lt9611uxc_probe(struct i2c_client *client) 848 { 849 struct lt9611uxc *lt9611uxc; 850 struct device *dev = &client->dev; 851 int ret; 852 bool fw_updated = false; 853 854 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 855 dev_err(dev, "device doesn't support I2C\n"); 856 return -ENODEV; 857 } 858 859 lt9611uxc = devm_kzalloc(dev, sizeof(*lt9611uxc), GFP_KERNEL); 860 if (!lt9611uxc) 861 return -ENOMEM; 862 863 lt9611uxc->dev = dev; 864 lt9611uxc->client = client; 865 mutex_init(<9611uxc->ocm_lock); 866 867 lt9611uxc->regmap = devm_regmap_init_i2c(client, <9611uxc_regmap_config); 868 if (IS_ERR(lt9611uxc->regmap)) { 869 dev_err(lt9611uxc->dev, "regmap i2c init failed\n"); 870 return PTR_ERR(lt9611uxc->regmap); 871 } 872 873 ret = lt9611uxc_parse_dt(dev, lt9611uxc); 874 if (ret) { 875 dev_err(dev, "failed to parse device tree\n"); 876 return ret; 877 } 878 879 ret = lt9611uxc_gpio_init(lt9611uxc); 880 if (ret < 0) 881 goto err_of_put; 882 883 ret = lt9611uxc_regulator_init(lt9611uxc); 884 if (ret < 0) 885 goto err_of_put; 886 887 lt9611uxc_assert_5v(lt9611uxc); 888 889 ret = lt9611uxc_regulator_enable(lt9611uxc); 890 if (ret) 891 goto err_of_put; 892 893 lt9611uxc_reset(lt9611uxc); 894 895 ret = lt9611uxc_read_device_rev(lt9611uxc); 896 if (ret) { 897 dev_err(dev, "failed to read chip rev\n"); 898 goto err_disable_regulators; 899 } 900 901 retry: 902 ret = lt9611uxc_read_version(lt9611uxc); 903 if (ret < 0) { 904 dev_err(dev, "failed to read FW version\n"); 905 goto err_disable_regulators; 906 } else if (ret == 0) { 907 if (!fw_updated) { 908 fw_updated = true; 909 dev_err(dev, "FW version 0, enforcing firmware update\n"); 910 ret = lt9611uxc_firmware_update(lt9611uxc); 911 if (ret < 0) 912 goto err_disable_regulators; 913 else 914 goto retry; 915 } else { 916 dev_err(dev, "FW version 0, update failed\n"); 917 ret = -EOPNOTSUPP; 918 goto err_disable_regulators; 919 } 920 } else if (ret < 0x40) { 921 dev_info(dev, "FW version 0x%x, HPD not supported\n", ret); 922 } else { 923 lt9611uxc->hpd_supported = true; 924 } 925 lt9611uxc->fw_version = ret; 926 927 init_waitqueue_head(<9611uxc->wq); 928 INIT_WORK(<9611uxc->work, lt9611uxc_hpd_work); 929 930 ret = request_threaded_irq(client->irq, NULL, 931 lt9611uxc_irq_thread_handler, 932 IRQF_ONESHOT, "lt9611uxc", lt9611uxc); 933 if (ret) { 934 dev_err(dev, "failed to request irq\n"); 935 goto err_disable_regulators; 936 } 937 938 i2c_set_clientdata(client, lt9611uxc); 939 940 lt9611uxc->bridge.funcs = <9611uxc_bridge_funcs; 941 lt9611uxc->bridge.of_node = client->dev.of_node; 942 lt9611uxc->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID; 943 if (lt9611uxc->hpd_supported) 944 lt9611uxc->bridge.ops |= DRM_BRIDGE_OP_HPD; 945 lt9611uxc->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 946 947 drm_bridge_add(<9611uxc->bridge); 948 949 /* Attach primary DSI */ 950 lt9611uxc->dsi0 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi0_node); 951 if (IS_ERR(lt9611uxc->dsi0)) { 952 ret = PTR_ERR(lt9611uxc->dsi0); 953 goto err_remove_bridge; 954 } 955 956 /* Attach secondary DSI, if specified */ 957 if (lt9611uxc->dsi1_node) { 958 lt9611uxc->dsi1 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi1_node); 959 if (IS_ERR(lt9611uxc->dsi1)) { 960 ret = PTR_ERR(lt9611uxc->dsi1); 961 goto err_remove_bridge; 962 } 963 } 964 965 return lt9611uxc_audio_init(dev, lt9611uxc); 966 967 err_remove_bridge: 968 free_irq(client->irq, lt9611uxc); 969 cancel_work_sync(<9611uxc->work); 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 free_irq(client->irq, lt9611uxc); 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