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/interrupt.h> 10 #include <linux/module.h> 11 #include <linux/mutex.h> 12 #include <linux/of_graph.h> 13 #include <linux/platform_device.h> 14 #include <linux/regmap.h> 15 #include <linux/regulator/consumer.h> 16 #include <linux/wait.h> 17 18 #include <sound/hdmi-codec.h> 19 20 #include <drm/drm_atomic_helper.h> 21 #include <drm/drm_bridge.h> 22 #include <drm/drm_mipi_dsi.h> 23 #include <drm/drm_print.h> 24 #include <drm/drm_probe_helper.h> 25 26 #define EDID_BLOCK_SIZE 128 27 #define EDID_NUM_BLOCKS 2 28 29 struct lt9611uxc { 30 struct device *dev; 31 struct drm_bridge bridge; 32 struct drm_connector connector; 33 34 struct regmap *regmap; 35 /* Protects all accesses to registers by stopping the on-chip MCU */ 36 struct mutex ocm_lock; 37 38 struct wait_queue_head wq; 39 40 struct device_node *dsi0_node; 41 struct device_node *dsi1_node; 42 struct mipi_dsi_device *dsi0; 43 struct mipi_dsi_device *dsi1; 44 struct platform_device *audio_pdev; 45 46 struct gpio_desc *reset_gpio; 47 struct gpio_desc *enable_gpio; 48 49 struct regulator_bulk_data supplies[2]; 50 51 struct i2c_client *client; 52 53 bool hpd_supported; 54 bool edid_read; 55 uint8_t fw_version; 56 }; 57 58 #define LT9611_PAGE_CONTROL 0xff 59 60 static const struct regmap_range_cfg lt9611uxc_ranges[] = { 61 { 62 .name = "register_range", 63 .range_min = 0, 64 .range_max = 0xd0ff, 65 .selector_reg = LT9611_PAGE_CONTROL, 66 .selector_mask = 0xff, 67 .selector_shift = 0, 68 .window_start = 0, 69 .window_len = 0x100, 70 }, 71 }; 72 73 static const struct regmap_config lt9611uxc_regmap_config = { 74 .reg_bits = 8, 75 .val_bits = 8, 76 .max_register = 0xffff, 77 .ranges = lt9611uxc_ranges, 78 .num_ranges = ARRAY_SIZE(lt9611uxc_ranges), 79 }; 80 81 struct lt9611uxc_mode { 82 u16 hdisplay; 83 u16 vdisplay; 84 u8 vrefresh; 85 }; 86 87 /* 88 * This chip supports only a fixed set of modes. 89 * Enumerate them here to check whether the mode is supported. 90 */ 91 static struct lt9611uxc_mode lt9611uxc_modes[] = { 92 { 1920, 1080, 60 }, 93 { 1920, 1080, 30 }, 94 { 1920, 1080, 25 }, 95 { 1366, 768, 60 }, 96 { 1360, 768, 60 }, 97 { 1280, 1024, 60 }, 98 { 1280, 800, 60 }, 99 { 1280, 720, 60 }, 100 { 1280, 720, 50 }, 101 { 1280, 720, 30 }, 102 { 1152, 864, 60 }, 103 { 1024, 768, 60 }, 104 { 800, 600, 60 }, 105 { 720, 576, 50 }, 106 { 720, 480, 60 }, 107 { 640, 480, 60 }, 108 }; 109 110 static struct lt9611uxc *bridge_to_lt9611uxc(struct drm_bridge *bridge) 111 { 112 return container_of(bridge, struct lt9611uxc, bridge); 113 } 114 115 static struct lt9611uxc *connector_to_lt9611uxc(struct drm_connector *connector) 116 { 117 return container_of(connector, struct lt9611uxc, connector); 118 } 119 120 static void lt9611uxc_lock(struct lt9611uxc *lt9611uxc) 121 { 122 mutex_lock(<9611uxc->ocm_lock); 123 regmap_write(lt9611uxc->regmap, 0x80ee, 0x01); 124 } 125 126 static void lt9611uxc_unlock(struct lt9611uxc *lt9611uxc) 127 { 128 regmap_write(lt9611uxc->regmap, 0x80ee, 0x00); 129 msleep(50); 130 mutex_unlock(<9611uxc->ocm_lock); 131 } 132 133 static irqreturn_t lt9611uxc_irq_thread_handler(int irq, void *dev_id) 134 { 135 struct lt9611uxc *lt9611uxc = dev_id; 136 unsigned int irq_status = 0; 137 unsigned int hpd_status = 0; 138 139 lt9611uxc_lock(lt9611uxc); 140 141 regmap_read(lt9611uxc->regmap, 0xb022, &irq_status); 142 regmap_read(lt9611uxc->regmap, 0xb023, &hpd_status); 143 if (irq_status) 144 regmap_write(lt9611uxc->regmap, 0xb022, 0); 145 146 lt9611uxc_unlock(lt9611uxc); 147 148 if (irq_status & BIT(0)) 149 lt9611uxc->edid_read = !!(hpd_status & BIT(0)); 150 151 if (irq_status & BIT(1)) { 152 if (lt9611uxc->connector.dev) 153 drm_kms_helper_hotplug_event(lt9611uxc->connector.dev); 154 else 155 drm_bridge_hpd_notify(<9611uxc->bridge, !!(hpd_status & BIT(1))); 156 } 157 158 return IRQ_HANDLED; 159 } 160 161 static void lt9611uxc_reset(struct lt9611uxc *lt9611uxc) 162 { 163 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1); 164 msleep(20); 165 166 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 0); 167 msleep(20); 168 169 gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1); 170 msleep(300); 171 } 172 173 static void lt9611uxc_assert_5v(struct lt9611uxc *lt9611uxc) 174 { 175 if (!lt9611uxc->enable_gpio) 176 return; 177 178 gpiod_set_value_cansleep(lt9611uxc->enable_gpio, 1); 179 msleep(20); 180 } 181 182 static int lt9611uxc_regulator_init(struct lt9611uxc *lt9611uxc) 183 { 184 int ret; 185 186 lt9611uxc->supplies[0].supply = "vdd"; 187 lt9611uxc->supplies[1].supply = "vcc"; 188 189 ret = devm_regulator_bulk_get(lt9611uxc->dev, 2, lt9611uxc->supplies); 190 if (ret < 0) 191 return ret; 192 193 return regulator_set_load(lt9611uxc->supplies[0].consumer, 200000); 194 } 195 196 static int lt9611uxc_regulator_enable(struct lt9611uxc *lt9611uxc) 197 { 198 int ret; 199 200 ret = regulator_enable(lt9611uxc->supplies[0].consumer); 201 if (ret < 0) 202 return ret; 203 204 usleep_range(1000, 10000); /* 50000 according to dtsi */ 205 206 ret = regulator_enable(lt9611uxc->supplies[1].consumer); 207 if (ret < 0) { 208 regulator_disable(lt9611uxc->supplies[0].consumer); 209 return ret; 210 } 211 212 return 0; 213 } 214 215 static struct lt9611uxc_mode *lt9611uxc_find_mode(const struct drm_display_mode *mode) 216 { 217 int i; 218 219 for (i = 0; i < ARRAY_SIZE(lt9611uxc_modes); i++) { 220 if (lt9611uxc_modes[i].hdisplay == mode->hdisplay && 221 lt9611uxc_modes[i].vdisplay == mode->vdisplay && 222 lt9611uxc_modes[i].vrefresh == drm_mode_vrefresh(mode)) { 223 return <9611uxc_modes[i]; 224 } 225 } 226 227 return NULL; 228 } 229 230 static struct mipi_dsi_device *lt9611uxc_attach_dsi(struct lt9611uxc *lt9611uxc, 231 struct device_node *dsi_node) 232 { 233 const struct mipi_dsi_device_info info = { "lt9611uxc", 0, NULL }; 234 struct mipi_dsi_device *dsi; 235 struct mipi_dsi_host *host; 236 int ret; 237 238 host = of_find_mipi_dsi_host_by_node(dsi_node); 239 if (!host) { 240 dev_err(lt9611uxc->dev, "failed to find dsi host\n"); 241 return ERR_PTR(-EPROBE_DEFER); 242 } 243 244 dsi = mipi_dsi_device_register_full(host, &info); 245 if (IS_ERR(dsi)) { 246 dev_err(lt9611uxc->dev, "failed to create dsi device\n"); 247 return dsi; 248 } 249 250 dsi->lanes = 4; 251 dsi->format = MIPI_DSI_FMT_RGB888; 252 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 253 MIPI_DSI_MODE_VIDEO_HSE; 254 255 ret = mipi_dsi_attach(dsi); 256 if (ret < 0) { 257 dev_err(lt9611uxc->dev, "failed to attach dsi to host\n"); 258 mipi_dsi_device_unregister(dsi); 259 return ERR_PTR(ret); 260 } 261 262 return dsi; 263 } 264 265 static int lt9611uxc_connector_get_modes(struct drm_connector *connector) 266 { 267 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector); 268 unsigned int count; 269 struct edid *edid; 270 271 edid = lt9611uxc->bridge.funcs->get_edid(<9611uxc->bridge, connector); 272 drm_connector_update_edid_property(connector, edid); 273 count = drm_add_edid_modes(connector, edid); 274 kfree(edid); 275 276 return count; 277 } 278 279 static enum drm_connector_status lt9611uxc_connector_detect(struct drm_connector *connector, 280 bool force) 281 { 282 struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector); 283 284 return lt9611uxc->bridge.funcs->detect(<9611uxc->bridge); 285 } 286 287 static enum drm_mode_status lt9611uxc_connector_mode_valid(struct drm_connector *connector, 288 struct drm_display_mode *mode) 289 { 290 struct lt9611uxc_mode *lt9611uxc_mode = lt9611uxc_find_mode(mode); 291 292 return lt9611uxc_mode ? MODE_OK : MODE_BAD; 293 } 294 295 static const struct drm_connector_helper_funcs lt9611uxc_bridge_connector_helper_funcs = { 296 .get_modes = lt9611uxc_connector_get_modes, 297 .mode_valid = lt9611uxc_connector_mode_valid, 298 }; 299 300 static const struct drm_connector_funcs lt9611uxc_bridge_connector_funcs = { 301 .fill_modes = drm_helper_probe_single_connector_modes, 302 .detect = lt9611uxc_connector_detect, 303 .destroy = drm_connector_cleanup, 304 .reset = drm_atomic_helper_connector_reset, 305 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 306 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 307 }; 308 309 static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc *lt9611uxc) 310 { 311 int ret; 312 313 if (!bridge->encoder) { 314 DRM_ERROR("Parent encoder object not found"); 315 return -ENODEV; 316 } 317 318 drm_connector_helper_add(<9611uxc->connector, 319 <9611uxc_bridge_connector_helper_funcs); 320 ret = drm_connector_init(bridge->dev, <9611uxc->connector, 321 <9611uxc_bridge_connector_funcs, 322 DRM_MODE_CONNECTOR_HDMIA); 323 if (ret) { 324 DRM_ERROR("Failed to initialize connector with drm\n"); 325 return ret; 326 } 327 328 return drm_connector_attach_encoder(<9611uxc->connector, bridge->encoder); 329 } 330 331 static void lt9611uxc_bridge_detach(struct drm_bridge *bridge) 332 { 333 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 334 335 if (lt9611uxc->dsi1) { 336 mipi_dsi_detach(lt9611uxc->dsi1); 337 mipi_dsi_device_unregister(lt9611uxc->dsi1); 338 } 339 340 mipi_dsi_detach(lt9611uxc->dsi0); 341 mipi_dsi_device_unregister(lt9611uxc->dsi0); 342 } 343 344 static int lt9611uxc_bridge_attach(struct drm_bridge *bridge, 345 enum drm_bridge_attach_flags flags) 346 { 347 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 348 int ret; 349 350 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { 351 ret = lt9611uxc_connector_init(bridge, lt9611uxc); 352 if (ret < 0) 353 return ret; 354 } 355 356 /* Attach primary DSI */ 357 lt9611uxc->dsi0 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi0_node); 358 if (IS_ERR(lt9611uxc->dsi0)) 359 return PTR_ERR(lt9611uxc->dsi0); 360 361 /* Attach secondary DSI, if specified */ 362 if (lt9611uxc->dsi1_node) { 363 lt9611uxc->dsi1 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi1_node); 364 if (IS_ERR(lt9611uxc->dsi1)) { 365 ret = PTR_ERR(lt9611uxc->dsi1); 366 goto err_unregister_dsi0; 367 } 368 } 369 370 return 0; 371 372 err_unregister_dsi0: 373 mipi_dsi_detach(lt9611uxc->dsi0); 374 mipi_dsi_device_unregister(lt9611uxc->dsi0); 375 376 return ret; 377 } 378 379 static enum drm_mode_status 380 lt9611uxc_bridge_mode_valid(struct drm_bridge *bridge, 381 const struct drm_display_info *info, 382 const struct drm_display_mode *mode) 383 { 384 struct lt9611uxc_mode *lt9611uxc_mode; 385 386 lt9611uxc_mode = lt9611uxc_find_mode(mode); 387 388 return lt9611uxc_mode ? MODE_OK : MODE_BAD; 389 } 390 391 static void lt9611uxc_video_setup(struct lt9611uxc *lt9611uxc, 392 const struct drm_display_mode *mode) 393 { 394 u32 h_total, hactive, hsync_len, hfront_porch; 395 u32 v_total, vactive, vsync_len, vfront_porch; 396 397 h_total = mode->htotal; 398 v_total = mode->vtotal; 399 400 hactive = mode->hdisplay; 401 hsync_len = mode->hsync_end - mode->hsync_start; 402 hfront_porch = mode->hsync_start - mode->hdisplay; 403 404 vactive = mode->vdisplay; 405 vsync_len = mode->vsync_end - mode->vsync_start; 406 vfront_porch = mode->vsync_start - mode->vdisplay; 407 408 regmap_write(lt9611uxc->regmap, 0xd00d, (u8)(v_total / 256)); 409 regmap_write(lt9611uxc->regmap, 0xd00e, (u8)(v_total % 256)); 410 411 regmap_write(lt9611uxc->regmap, 0xd00f, (u8)(vactive / 256)); 412 regmap_write(lt9611uxc->regmap, 0xd010, (u8)(vactive % 256)); 413 414 regmap_write(lt9611uxc->regmap, 0xd011, (u8)(h_total / 256)); 415 regmap_write(lt9611uxc->regmap, 0xd012, (u8)(h_total % 256)); 416 417 regmap_write(lt9611uxc->regmap, 0xd013, (u8)(hactive / 256)); 418 regmap_write(lt9611uxc->regmap, 0xd014, (u8)(hactive % 256)); 419 420 regmap_write(lt9611uxc->regmap, 0xd015, (u8)(vsync_len % 256)); 421 422 regmap_update_bits(lt9611uxc->regmap, 0xd016, 0xf, (u8)(hsync_len / 256)); 423 regmap_write(lt9611uxc->regmap, 0xd017, (u8)(hsync_len % 256)); 424 425 regmap_update_bits(lt9611uxc->regmap, 0xd018, 0xf, (u8)(vfront_porch / 256)); 426 regmap_write(lt9611uxc->regmap, 0xd019, (u8)(vfront_porch % 256)); 427 428 regmap_update_bits(lt9611uxc->regmap, 0xd01a, 0xf, (u8)(hfront_porch / 256)); 429 regmap_write(lt9611uxc->regmap, 0xd01b, (u8)(hfront_porch % 256)); 430 } 431 432 static void lt9611uxc_bridge_mode_set(struct drm_bridge *bridge, 433 const struct drm_display_mode *mode, 434 const struct drm_display_mode *adj_mode) 435 { 436 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 437 438 lt9611uxc_lock(lt9611uxc); 439 lt9611uxc_video_setup(lt9611uxc, mode); 440 lt9611uxc_unlock(lt9611uxc); 441 } 442 443 static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *bridge) 444 { 445 struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); 446 unsigned int reg_val = 0; 447 int ret; 448 int connected = 1; 449 450 if (lt9611uxc->hpd_supported) { 451 lt9611uxc_lock(lt9611uxc); 452 ret = regmap_read(lt9611uxc->regmap, 0xb023, ®_val); 453 lt9611uxc_unlock(lt9611uxc); 454 455 if (ret) 456 dev_err(lt9611uxc->dev, "failed to read hpd status: %d\n", ret); 457 else 458 connected = reg_val & BIT(1); 459 } 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(100)); 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 ERR_PTR(ret); 507 } 508 509 return drm_do_get_edid(connector, lt9611uxc_get_edid_block, lt9611uxc); 510 } 511 512 static const struct drm_bridge_funcs lt9611uxc_bridge_funcs = { 513 .attach = lt9611uxc_bridge_attach, 514 .detach = lt9611uxc_bridge_detach, 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, "lt9611uxc_fw.bin", 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 snprintf(buf, PAGE_SIZE, "%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 const struct i2c_device_id *id) 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 = &client->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(&client->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 ret = devm_request_threaded_irq(dev, client->irq, NULL, 930 lt9611uxc_irq_thread_handler, 931 IRQF_ONESHOT, "lt9611uxc", lt9611uxc); 932 if (ret) { 933 dev_err(dev, "failed to request irq\n"); 934 goto err_disable_regulators; 935 } 936 937 i2c_set_clientdata(client, lt9611uxc); 938 939 lt9611uxc->bridge.funcs = <9611uxc_bridge_funcs; 940 lt9611uxc->bridge.of_node = client->dev.of_node; 941 lt9611uxc->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID; 942 if (lt9611uxc->hpd_supported) 943 lt9611uxc->bridge.ops |= DRM_BRIDGE_OP_HPD; 944 lt9611uxc->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 945 946 drm_bridge_add(<9611uxc->bridge); 947 948 return lt9611uxc_audio_init(dev, lt9611uxc); 949 950 err_disable_regulators: 951 regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies); 952 953 err_of_put: 954 of_node_put(lt9611uxc->dsi1_node); 955 of_node_put(lt9611uxc->dsi0_node); 956 957 return ret; 958 } 959 960 static int lt9611uxc_remove(struct i2c_client *client) 961 { 962 struct lt9611uxc *lt9611uxc = i2c_get_clientdata(client); 963 964 disable_irq(client->irq); 965 lt9611uxc_audio_exit(lt9611uxc); 966 drm_bridge_remove(<9611uxc->bridge); 967 968 mutex_destroy(<9611uxc->ocm_lock); 969 970 regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies); 971 972 of_node_put(lt9611uxc->dsi1_node); 973 of_node_put(lt9611uxc->dsi0_node); 974 975 return 0; 976 } 977 978 static struct i2c_device_id lt9611uxc_id[] = { 979 { "lontium,lt9611uxc", 0 }, 980 { /* sentinel */ } 981 }; 982 983 static const struct of_device_id lt9611uxc_match_table[] = { 984 { .compatible = "lontium,lt9611uxc" }, 985 { /* sentinel */ } 986 }; 987 MODULE_DEVICE_TABLE(of, lt9611uxc_match_table); 988 989 static struct i2c_driver lt9611uxc_driver = { 990 .driver = { 991 .name = "lt9611uxc", 992 .of_match_table = lt9611uxc_match_table, 993 .dev_groups = lt9611uxc_attr_groups, 994 }, 995 .probe = lt9611uxc_probe, 996 .remove = lt9611uxc_remove, 997 .id_table = lt9611uxc_id, 998 }; 999 module_i2c_driver(lt9611uxc_driver); 1000 1001 MODULE_AUTHOR("Dmitry Baryshkov <dmitry.baryshkov@linaro.org>"); 1002 MODULE_LICENSE("GPL v2"); 1003