1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Microchip CSI2 Demux Controller (CSI2DC) driver 4 * 5 * Copyright (C) 2018 Microchip Technology, Inc. 6 * 7 * Author: Eugen Hristev <eugen.hristev@microchip.com> 8 * 9 */ 10 11 #include <linux/clk.h> 12 #include <linux/mod_devicetable.h> 13 #include <linux/module.h> 14 #include <linux/of_graph.h> 15 #include <linux/platform_device.h> 16 #include <linux/pm_runtime.h> 17 #include <linux/videodev2.h> 18 19 #include <media/v4l2-fwnode.h> 20 #include <media/v4l2-subdev.h> 21 22 /* Global configuration register */ 23 #define CSI2DC_GCFG 0x0 24 25 /* MIPI sensor pixel clock is free running */ 26 #define CSI2DC_GCFG_MIPIFRN BIT(0) 27 /* GPIO parallel interface selection */ 28 #define CSI2DC_GCFG_GPIOSEL BIT(1) 29 /* Output waveform inter-line minimum delay */ 30 #define CSI2DC_GCFG_HLC(v) ((v) << 4) 31 #define CSI2DC_GCFG_HLC_MASK GENMASK(7, 4) 32 /* SAMA7G5 requires a HLC delay of 15 */ 33 #define SAMA7G5_HLC (15) 34 35 /* Global control register */ 36 #define CSI2DC_GCTLR 0x04 37 #define CSI2DC_GCTLR_SWRST BIT(0) 38 39 /* Global status register */ 40 #define CSI2DC_GS 0x08 41 42 /* SSP interrupt status register */ 43 #define CSI2DC_SSPIS 0x28 44 /* Pipe update register */ 45 #define CSI2DC_PU 0xc0 46 /* Video pipe attributes update */ 47 #define CSI2DC_PU_VP BIT(0) 48 49 /* Pipe update status register */ 50 #define CSI2DC_PUS 0xc4 51 52 /* Video pipeline Interrupt Status Register */ 53 #define CSI2DC_VPISR 0xf4 54 55 /* Video pipeline enable register */ 56 #define CSI2DC_VPE 0xf8 57 #define CSI2DC_VPE_ENABLE BIT(0) 58 59 /* Video pipeline configuration register */ 60 #define CSI2DC_VPCFG 0xfc 61 /* Data type */ 62 #define CSI2DC_VPCFG_DT(v) ((v) << 0) 63 #define CSI2DC_VPCFG_DT_MASK GENMASK(5, 0) 64 /* Virtual channel identifier */ 65 #define CSI2DC_VPCFG_VC(v) ((v) << 6) 66 #define CSI2DC_VPCFG_VC_MASK GENMASK(7, 6) 67 /* Decompression enable */ 68 #define CSI2DC_VPCFG_DE BIT(8) 69 /* Decoder mode */ 70 #define CSI2DC_VPCFG_DM(v) ((v) << 9) 71 #define CSI2DC_VPCFG_DM_DECODER8TO12 0 72 /* Decoder predictor 2 selection */ 73 #define CSI2DC_VPCFG_DP2 BIT(12) 74 /* Recommended memory storage */ 75 #define CSI2DC_VPCFG_RMS BIT(13) 76 /* Post adjustment */ 77 #define CSI2DC_VPCFG_PA BIT(14) 78 79 /* Video pipeline column register */ 80 #define CSI2DC_VPCOL 0x100 81 /* Column number */ 82 #define CSI2DC_VPCOL_COL(v) ((v) << 0) 83 #define CSI2DC_VPCOL_COL_MASK GENMASK(15, 0) 84 85 /* Video pipeline row register */ 86 #define CSI2DC_VPROW 0x104 87 /* Row number */ 88 #define CSI2DC_VPROW_ROW(v) ((v) << 0) 89 #define CSI2DC_VPROW_ROW_MASK GENMASK(15, 0) 90 91 /* Version register */ 92 #define CSI2DC_VERSION 0x1fc 93 94 /* register read/write helpers */ 95 #define csi2dc_readl(st, reg) readl_relaxed((st)->base + (reg)) 96 #define csi2dc_writel(st, reg, val) writel_relaxed((val), \ 97 (st)->base + (reg)) 98 99 /* supported RAW data types */ 100 #define CSI2DC_DT_RAW6 0x28 101 #define CSI2DC_DT_RAW7 0x29 102 #define CSI2DC_DT_RAW8 0x2a 103 #define CSI2DC_DT_RAW10 0x2b 104 #define CSI2DC_DT_RAW12 0x2c 105 #define CSI2DC_DT_RAW14 0x2d 106 /* YUV data types */ 107 #define CSI2DC_DT_YUV422_8B 0x1e 108 109 /* 110 * struct csi2dc_format - CSI2DC format type struct 111 * @mbus_code: Media bus code for the format 112 * @dt: Data type constant for this format 113 */ 114 struct csi2dc_format { 115 u32 mbus_code; 116 u32 dt; 117 }; 118 119 static const struct csi2dc_format csi2dc_formats[] = { 120 { 121 .mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8, 122 .dt = CSI2DC_DT_RAW8, 123 }, { 124 .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8, 125 .dt = CSI2DC_DT_RAW8, 126 }, { 127 .mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8, 128 .dt = CSI2DC_DT_RAW8, 129 }, { 130 .mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8, 131 .dt = CSI2DC_DT_RAW8, 132 }, { 133 .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10, 134 .dt = CSI2DC_DT_RAW10, 135 }, { 136 .mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10, 137 .dt = CSI2DC_DT_RAW10, 138 }, { 139 .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10, 140 .dt = CSI2DC_DT_RAW10, 141 }, { 142 .mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10, 143 .dt = CSI2DC_DT_RAW10, 144 }, { 145 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 146 .dt = CSI2DC_DT_YUV422_8B, 147 }, 148 }; 149 150 enum mipi_csi_pads { 151 CSI2DC_PAD_SINK = 0, 152 CSI2DC_PAD_SOURCE = 1, 153 CSI2DC_PADS_NUM = 2, 154 }; 155 156 /* 157 * struct csi2dc_device - CSI2DC device driver data/config struct 158 * @base: Register map base address 159 * @csi2dc_sd: v4l2 subdevice for the csi2dc device 160 * This is the subdevice that the csi2dc device itself 161 * registers in v4l2 subsystem 162 * @dev: struct device for this csi2dc device 163 * @pclk: Peripheral clock reference 164 * Input clock that clocks the hardware block internal 165 * logic 166 * @scck: Sensor Controller clock reference 167 * Input clock that is used to generate the pixel clock 168 * @format: Current saved format used in g/s fmt 169 * @cur_fmt: Current state format 170 * @try_fmt: Try format that is being tried 171 * @pads: Media entity pads for the csi2dc subdevice 172 * @clk_gated: Whether the clock is gated or free running 173 * @video_pipe: Whether video pipeline is configured 174 * @parallel_mode: The underlying subdevice is connected on a parallel bus 175 * @vc: Current set virtual channel 176 * @notifier: Async notifier that is used to bound the underlying 177 * subdevice to the csi2dc subdevice 178 * @input_sd: Reference to the underlying subdevice bound to the 179 * csi2dc subdevice 180 * @remote_pad: Pad number of the underlying subdevice that is linked 181 * to the csi2dc subdevice sink pad. 182 */ 183 struct csi2dc_device { 184 void __iomem *base; 185 struct v4l2_subdev csi2dc_sd; 186 struct device *dev; 187 struct clk *pclk; 188 struct clk *scck; 189 190 struct v4l2_mbus_framefmt format; 191 192 const struct csi2dc_format *cur_fmt; 193 const struct csi2dc_format *try_fmt; 194 195 struct media_pad pads[CSI2DC_PADS_NUM]; 196 197 bool clk_gated; 198 bool video_pipe; 199 bool parallel_mode; 200 u32 vc; 201 202 struct v4l2_async_notifier notifier; 203 204 struct v4l2_subdev *input_sd; 205 206 u32 remote_pad; 207 }; 208 209 static inline struct csi2dc_device * 210 csi2dc_sd_to_csi2dc_device(struct v4l2_subdev *csi2dc_sd) 211 { 212 return container_of(csi2dc_sd, struct csi2dc_device, csi2dc_sd); 213 } 214 215 static int csi2dc_enum_mbus_code(struct v4l2_subdev *csi2dc_sd, 216 struct v4l2_subdev_state *sd_state, 217 struct v4l2_subdev_mbus_code_enum *code) 218 { 219 if (code->index >= ARRAY_SIZE(csi2dc_formats)) 220 return -EINVAL; 221 222 code->code = csi2dc_formats[code->index].mbus_code; 223 224 return 0; 225 } 226 227 static int csi2dc_get_fmt(struct v4l2_subdev *csi2dc_sd, 228 struct v4l2_subdev_state *sd_state, 229 struct v4l2_subdev_format *format) 230 { 231 struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); 232 struct v4l2_mbus_framefmt *v4l2_try_fmt; 233 234 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 235 v4l2_try_fmt = v4l2_subdev_get_try_format(csi2dc_sd, sd_state, 236 format->pad); 237 format->format = *v4l2_try_fmt; 238 239 return 0; 240 } 241 242 format->format = csi2dc->format; 243 244 return 0; 245 } 246 247 static int csi2dc_set_fmt(struct v4l2_subdev *csi2dc_sd, 248 struct v4l2_subdev_state *sd_state, 249 struct v4l2_subdev_format *req_fmt) 250 { 251 struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); 252 const struct csi2dc_format *fmt, *try_fmt = NULL; 253 struct v4l2_mbus_framefmt *v4l2_try_fmt; 254 unsigned int i; 255 256 /* 257 * Setting the source pad is disabled. 258 * The same format is being propagated from the sink to source. 259 */ 260 if (req_fmt->pad == CSI2DC_PAD_SOURCE) 261 return -EINVAL; 262 263 for (i = 0; i < ARRAY_SIZE(csi2dc_formats); i++) { 264 fmt = &csi2dc_formats[i]; 265 if (req_fmt->format.code == fmt->mbus_code) 266 try_fmt = fmt; 267 fmt++; 268 } 269 270 /* in case we could not find the desired format, default to something */ 271 if (!try_fmt) { 272 try_fmt = &csi2dc_formats[0]; 273 274 dev_dbg(csi2dc->dev, 275 "CSI2DC unsupported format 0x%x, defaulting to 0x%x\n", 276 req_fmt->format.code, csi2dc_formats[0].mbus_code); 277 } 278 279 req_fmt->format.code = try_fmt->mbus_code; 280 req_fmt->format.colorspace = V4L2_COLORSPACE_SRGB; 281 req_fmt->format.field = V4L2_FIELD_NONE; 282 283 if (req_fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 284 v4l2_try_fmt = v4l2_subdev_get_try_format(csi2dc_sd, sd_state, 285 req_fmt->pad); 286 *v4l2_try_fmt = req_fmt->format; 287 /* Trying on the sink pad makes the source pad change too */ 288 v4l2_try_fmt = v4l2_subdev_get_try_format(csi2dc_sd, 289 sd_state, 290 CSI2DC_PAD_SOURCE); 291 *v4l2_try_fmt = req_fmt->format; 292 293 /* if we are just trying, we are done */ 294 return 0; 295 } 296 297 /* save the format for later requests */ 298 csi2dc->format = req_fmt->format; 299 300 /* update config */ 301 csi2dc->cur_fmt = try_fmt; 302 303 dev_dbg(csi2dc->dev, "new format set: 0x%x @%dx%d\n", 304 csi2dc->format.code, csi2dc->format.width, 305 csi2dc->format.height); 306 307 return 0; 308 } 309 310 static int csi2dc_power(struct csi2dc_device *csi2dc, int on) 311 { 312 int ret = 0; 313 314 if (on) { 315 ret = clk_prepare_enable(csi2dc->pclk); 316 if (ret) { 317 dev_err(csi2dc->dev, "failed to enable pclk:%d\n", ret); 318 return ret; 319 } 320 321 ret = clk_prepare_enable(csi2dc->scck); 322 if (ret) { 323 dev_err(csi2dc->dev, "failed to enable scck:%d\n", ret); 324 clk_disable_unprepare(csi2dc->pclk); 325 return ret; 326 } 327 328 /* if powering up, deassert reset line */ 329 csi2dc_writel(csi2dc, CSI2DC_GCTLR, CSI2DC_GCTLR_SWRST); 330 } else { 331 /* if powering down, assert reset line */ 332 csi2dc_writel(csi2dc, CSI2DC_GCTLR, 0); 333 334 clk_disable_unprepare(csi2dc->scck); 335 clk_disable_unprepare(csi2dc->pclk); 336 } 337 338 return ret; 339 } 340 341 static int csi2dc_get_mbus_config(struct csi2dc_device *csi2dc) 342 { 343 struct v4l2_mbus_config mbus_config = { 0 }; 344 int ret; 345 346 ret = v4l2_subdev_call(csi2dc->input_sd, pad, get_mbus_config, 347 csi2dc->remote_pad, &mbus_config); 348 if (ret == -ENOIOCTLCMD) { 349 dev_dbg(csi2dc->dev, 350 "no remote mbus configuration available\n"); 351 return 0; 352 } 353 354 if (ret) { 355 dev_err(csi2dc->dev, 356 "failed to get remote mbus configuration\n"); 357 return 0; 358 } 359 360 dev_dbg(csi2dc->dev, "subdev sending on channel %d\n", csi2dc->vc); 361 362 csi2dc->clk_gated = mbus_config.bus.parallel.flags & 363 V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK; 364 365 dev_dbg(csi2dc->dev, "mbus_config: %s clock\n", 366 csi2dc->clk_gated ? "gated" : "free running"); 367 368 return 0; 369 } 370 371 static void csi2dc_vp_update(struct csi2dc_device *csi2dc) 372 { 373 u32 vp, gcfg; 374 375 if (!csi2dc->video_pipe) { 376 dev_err(csi2dc->dev, "video pipeline unavailable\n"); 377 return; 378 } 379 380 if (csi2dc->parallel_mode) { 381 /* In parallel mode, GPIO parallel interface must be selected */ 382 gcfg = csi2dc_readl(csi2dc, CSI2DC_GCFG); 383 gcfg |= CSI2DC_GCFG_GPIOSEL; 384 csi2dc_writel(csi2dc, CSI2DC_GCFG, gcfg); 385 return; 386 } 387 388 /* serial video pipeline */ 389 390 csi2dc_writel(csi2dc, CSI2DC_GCFG, 391 (SAMA7G5_HLC & CSI2DC_GCFG_HLC_MASK) | 392 (csi2dc->clk_gated ? 0 : CSI2DC_GCFG_MIPIFRN)); 393 394 vp = CSI2DC_VPCFG_DT(csi2dc->cur_fmt->dt) & CSI2DC_VPCFG_DT_MASK; 395 vp |= CSI2DC_VPCFG_VC(csi2dc->vc) & CSI2DC_VPCFG_VC_MASK; 396 vp &= ~CSI2DC_VPCFG_DE; 397 vp |= CSI2DC_VPCFG_DM(CSI2DC_VPCFG_DM_DECODER8TO12); 398 vp &= ~CSI2DC_VPCFG_DP2; 399 vp &= ~CSI2DC_VPCFG_RMS; 400 vp |= CSI2DC_VPCFG_PA; 401 402 csi2dc_writel(csi2dc, CSI2DC_VPCFG, vp); 403 csi2dc_writel(csi2dc, CSI2DC_VPE, CSI2DC_VPE_ENABLE); 404 csi2dc_writel(csi2dc, CSI2DC_PU, CSI2DC_PU_VP); 405 } 406 407 static int csi2dc_s_stream(struct v4l2_subdev *csi2dc_sd, int enable) 408 { 409 struct csi2dc_device *csi2dc = csi2dc_sd_to_csi2dc_device(csi2dc_sd); 410 int ret; 411 412 if (enable) { 413 ret = pm_runtime_resume_and_get(csi2dc->dev); 414 if (ret < 0) 415 return ret; 416 417 csi2dc_get_mbus_config(csi2dc); 418 419 csi2dc_vp_update(csi2dc); 420 421 return v4l2_subdev_call(csi2dc->input_sd, video, s_stream, 422 true); 423 } 424 425 dev_dbg(csi2dc->dev, 426 "Last frame received: VPCOLR = %u, VPROWR= %u, VPISR = %x\n", 427 csi2dc_readl(csi2dc, CSI2DC_VPCOL), 428 csi2dc_readl(csi2dc, CSI2DC_VPROW), 429 csi2dc_readl(csi2dc, CSI2DC_VPISR)); 430 431 /* stop streaming scenario */ 432 ret = v4l2_subdev_call(csi2dc->input_sd, video, s_stream, false); 433 434 pm_runtime_put_sync(csi2dc->dev); 435 436 return ret; 437 } 438 439 static int csi2dc_init_cfg(struct v4l2_subdev *csi2dc_sd, 440 struct v4l2_subdev_state *sd_state) 441 { 442 struct v4l2_mbus_framefmt *v4l2_try_fmt = 443 v4l2_subdev_get_try_format(csi2dc_sd, sd_state, 0); 444 445 v4l2_try_fmt->height = 480; 446 v4l2_try_fmt->width = 640; 447 v4l2_try_fmt->code = csi2dc_formats[0].mbus_code; 448 v4l2_try_fmt->colorspace = V4L2_COLORSPACE_SRGB; 449 v4l2_try_fmt->field = V4L2_FIELD_NONE; 450 v4l2_try_fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; 451 v4l2_try_fmt->quantization = V4L2_QUANTIZATION_DEFAULT; 452 v4l2_try_fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT; 453 454 return 0; 455 } 456 457 static const struct media_entity_operations csi2dc_entity_ops = { 458 .link_validate = v4l2_subdev_link_validate, 459 }; 460 461 static const struct v4l2_subdev_pad_ops csi2dc_pad_ops = { 462 .enum_mbus_code = csi2dc_enum_mbus_code, 463 .set_fmt = csi2dc_set_fmt, 464 .get_fmt = csi2dc_get_fmt, 465 .init_cfg = csi2dc_init_cfg, 466 }; 467 468 static const struct v4l2_subdev_video_ops csi2dc_video_ops = { 469 .s_stream = csi2dc_s_stream, 470 }; 471 472 static const struct v4l2_subdev_ops csi2dc_subdev_ops = { 473 .pad = &csi2dc_pad_ops, 474 .video = &csi2dc_video_ops, 475 }; 476 477 static int csi2dc_async_bound(struct v4l2_async_notifier *notifier, 478 struct v4l2_subdev *subdev, 479 struct v4l2_async_subdev *asd) 480 { 481 struct csi2dc_device *csi2dc = container_of(notifier, 482 struct csi2dc_device, notifier); 483 int pad; 484 int ret; 485 486 csi2dc->input_sd = subdev; 487 488 pad = media_entity_get_fwnode_pad(&subdev->entity, asd->match.fwnode, 489 MEDIA_PAD_FL_SOURCE); 490 if (pad < 0) { 491 dev_err(csi2dc->dev, "Failed to find pad for %s\n", 492 subdev->name); 493 return pad; 494 } 495 496 csi2dc->remote_pad = pad; 497 498 ret = media_create_pad_link(&csi2dc->input_sd->entity, 499 csi2dc->remote_pad, 500 &csi2dc->csi2dc_sd.entity, 0, 501 MEDIA_LNK_FL_ENABLED); 502 if (ret) { 503 dev_err(csi2dc->dev, 504 "Failed to create pad link: %s to %s\n", 505 csi2dc->input_sd->entity.name, 506 csi2dc->csi2dc_sd.entity.name); 507 return ret; 508 } 509 510 dev_dbg(csi2dc->dev, "link with %s pad: %d\n", 511 csi2dc->input_sd->name, csi2dc->remote_pad); 512 513 return ret; 514 } 515 516 static const struct v4l2_async_notifier_operations csi2dc_async_ops = { 517 .bound = csi2dc_async_bound, 518 }; 519 520 static int csi2dc_prepare_notifier(struct csi2dc_device *csi2dc, 521 struct fwnode_handle *input_fwnode) 522 { 523 struct v4l2_async_subdev *asd; 524 int ret = 0; 525 526 v4l2_async_nf_init(&csi2dc->notifier); 527 528 asd = v4l2_async_nf_add_fwnode_remote(&csi2dc->notifier, 529 input_fwnode, 530 struct v4l2_async_subdev); 531 532 fwnode_handle_put(input_fwnode); 533 534 if (IS_ERR(asd)) { 535 ret = PTR_ERR(asd); 536 dev_err(csi2dc->dev, 537 "failed to add async notifier for node %pOF: %d\n", 538 to_of_node(input_fwnode), ret); 539 v4l2_async_nf_cleanup(&csi2dc->notifier); 540 return ret; 541 } 542 543 csi2dc->notifier.ops = &csi2dc_async_ops; 544 545 ret = v4l2_async_subdev_nf_register(&csi2dc->csi2dc_sd, 546 &csi2dc->notifier); 547 if (ret) { 548 dev_err(csi2dc->dev, "fail to register async notifier: %d\n", 549 ret); 550 v4l2_async_nf_cleanup(&csi2dc->notifier); 551 } 552 553 return ret; 554 } 555 556 static int csi2dc_of_parse(struct csi2dc_device *csi2dc, 557 struct device_node *of_node) 558 { 559 struct fwnode_handle *input_fwnode, *output_fwnode; 560 struct v4l2_fwnode_endpoint input_endpoint = { 0 }, 561 output_endpoint = { 0 }; 562 int ret; 563 564 input_fwnode = fwnode_graph_get_next_endpoint(of_fwnode_handle(of_node), 565 NULL); 566 if (!input_fwnode) { 567 dev_err(csi2dc->dev, 568 "missing port node at %pOF, input node is mandatory.\n", 569 of_node); 570 return -EINVAL; 571 } 572 573 ret = v4l2_fwnode_endpoint_parse(input_fwnode, &input_endpoint); 574 if (ret) { 575 dev_err(csi2dc->dev, "endpoint not defined at %pOF\n", of_node); 576 goto csi2dc_of_parse_err; 577 } 578 579 if (input_endpoint.bus_type == V4L2_MBUS_PARALLEL || 580 input_endpoint.bus_type == V4L2_MBUS_BT656) { 581 csi2dc->parallel_mode = true; 582 dev_dbg(csi2dc->dev, 583 "subdevice connected on parallel interface\n"); 584 } 585 586 if (input_endpoint.bus_type == V4L2_MBUS_CSI2_DPHY) { 587 csi2dc->clk_gated = input_endpoint.bus.mipi_csi2.flags & 588 V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK; 589 dev_dbg(csi2dc->dev, 590 "subdevice connected on serial interface\n"); 591 dev_dbg(csi2dc->dev, "DT: %s clock\n", 592 csi2dc->clk_gated ? "gated" : "free running"); 593 } 594 595 output_fwnode = fwnode_graph_get_next_endpoint 596 (of_fwnode_handle(of_node), input_fwnode); 597 598 if (output_fwnode) 599 ret = v4l2_fwnode_endpoint_parse(output_fwnode, 600 &output_endpoint); 601 602 fwnode_handle_put(output_fwnode); 603 604 if (!output_fwnode || ret) { 605 dev_info(csi2dc->dev, 606 "missing output node at %pOF, data pipe available only.\n", 607 of_node); 608 } else { 609 if (output_endpoint.bus_type != V4L2_MBUS_PARALLEL && 610 output_endpoint.bus_type != V4L2_MBUS_BT656) { 611 dev_err(csi2dc->dev, 612 "output port must be parallel/bt656.\n"); 613 ret = -EINVAL; 614 goto csi2dc_of_parse_err; 615 } 616 617 csi2dc->video_pipe = true; 618 619 dev_dbg(csi2dc->dev, 620 "block %pOF [%d.%d]->[%d.%d] video pipeline\n", 621 of_node, input_endpoint.base.port, 622 input_endpoint.base.id, output_endpoint.base.port, 623 output_endpoint.base.id); 624 } 625 626 /* prepare async notifier for subdevice completion */ 627 return csi2dc_prepare_notifier(csi2dc, input_fwnode); 628 629 csi2dc_of_parse_err: 630 fwnode_handle_put(input_fwnode); 631 return ret; 632 } 633 634 static void csi2dc_default_format(struct csi2dc_device *csi2dc) 635 { 636 csi2dc->cur_fmt = &csi2dc_formats[0]; 637 638 csi2dc->format.height = 480; 639 csi2dc->format.width = 640; 640 csi2dc->format.code = csi2dc_formats[0].mbus_code; 641 csi2dc->format.colorspace = V4L2_COLORSPACE_SRGB; 642 csi2dc->format.field = V4L2_FIELD_NONE; 643 csi2dc->format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; 644 csi2dc->format.quantization = V4L2_QUANTIZATION_DEFAULT; 645 csi2dc->format.xfer_func = V4L2_XFER_FUNC_DEFAULT; 646 } 647 648 static int csi2dc_probe(struct platform_device *pdev) 649 { 650 struct device *dev = &pdev->dev; 651 struct csi2dc_device *csi2dc; 652 int ret = 0; 653 u32 ver; 654 655 csi2dc = devm_kzalloc(dev, sizeof(*csi2dc), GFP_KERNEL); 656 if (!csi2dc) 657 return -ENOMEM; 658 659 csi2dc->dev = dev; 660 661 csi2dc->base = devm_platform_ioremap_resource(pdev, 0); 662 if (IS_ERR(csi2dc->base)) { 663 dev_err(dev, "base address not set\n"); 664 return PTR_ERR(csi2dc->base); 665 } 666 667 csi2dc->pclk = devm_clk_get(dev, "pclk"); 668 if (IS_ERR(csi2dc->pclk)) { 669 ret = PTR_ERR(csi2dc->pclk); 670 dev_err(dev, "failed to get pclk: %d\n", ret); 671 return ret; 672 } 673 674 csi2dc->scck = devm_clk_get(dev, "scck"); 675 if (IS_ERR(csi2dc->scck)) { 676 ret = PTR_ERR(csi2dc->scck); 677 dev_err(dev, "failed to get scck: %d\n", ret); 678 return ret; 679 } 680 681 v4l2_subdev_init(&csi2dc->csi2dc_sd, &csi2dc_subdev_ops); 682 683 csi2dc->csi2dc_sd.owner = THIS_MODULE; 684 csi2dc->csi2dc_sd.dev = dev; 685 snprintf(csi2dc->csi2dc_sd.name, sizeof(csi2dc->csi2dc_sd.name), 686 "csi2dc"); 687 688 csi2dc->csi2dc_sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 689 csi2dc->csi2dc_sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE; 690 csi2dc->csi2dc_sd.entity.ops = &csi2dc_entity_ops; 691 692 platform_set_drvdata(pdev, csi2dc); 693 694 ret = csi2dc_of_parse(csi2dc, dev->of_node); 695 if (ret) 696 goto csi2dc_probe_cleanup_entity; 697 698 csi2dc->pads[CSI2DC_PAD_SINK].flags = MEDIA_PAD_FL_SINK; 699 if (csi2dc->video_pipe) 700 csi2dc->pads[CSI2DC_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE; 701 702 ret = media_entity_pads_init(&csi2dc->csi2dc_sd.entity, 703 csi2dc->video_pipe ? CSI2DC_PADS_NUM : 1, 704 csi2dc->pads); 705 if (ret < 0) { 706 dev_err(dev, "media entity init failed\n"); 707 goto csi2dc_probe_cleanup_notifier; 708 } 709 710 csi2dc_default_format(csi2dc); 711 712 /* turn power on to validate capabilities */ 713 ret = csi2dc_power(csi2dc, true); 714 if (ret < 0) 715 goto csi2dc_probe_cleanup_notifier; 716 717 pm_runtime_set_active(dev); 718 pm_runtime_enable(dev); 719 ver = csi2dc_readl(csi2dc, CSI2DC_VERSION); 720 721 /* 722 * we must register the subdev after PM runtime has been requested, 723 * otherwise we might bound immediately and request pm_runtime_resume 724 * before runtime_enable. 725 */ 726 ret = v4l2_async_register_subdev(&csi2dc->csi2dc_sd); 727 if (ret) { 728 dev_err(csi2dc->dev, "failed to register the subdevice\n"); 729 goto csi2dc_probe_cleanup_notifier; 730 } 731 732 dev_info(dev, "Microchip CSI2DC version %x\n", ver); 733 734 return 0; 735 736 csi2dc_probe_cleanup_notifier: 737 v4l2_async_nf_cleanup(&csi2dc->notifier); 738 csi2dc_probe_cleanup_entity: 739 media_entity_cleanup(&csi2dc->csi2dc_sd.entity); 740 741 return ret; 742 } 743 744 static int csi2dc_remove(struct platform_device *pdev) 745 { 746 struct csi2dc_device *csi2dc = platform_get_drvdata(pdev); 747 748 pm_runtime_disable(&pdev->dev); 749 750 v4l2_async_unregister_subdev(&csi2dc->csi2dc_sd); 751 v4l2_async_nf_unregister(&csi2dc->notifier); 752 v4l2_async_nf_cleanup(&csi2dc->notifier); 753 media_entity_cleanup(&csi2dc->csi2dc_sd.entity); 754 755 return 0; 756 } 757 758 static int __maybe_unused csi2dc_runtime_suspend(struct device *dev) 759 { 760 struct csi2dc_device *csi2dc = dev_get_drvdata(dev); 761 762 return csi2dc_power(csi2dc, false); 763 } 764 765 static int __maybe_unused csi2dc_runtime_resume(struct device *dev) 766 { 767 struct csi2dc_device *csi2dc = dev_get_drvdata(dev); 768 769 return csi2dc_power(csi2dc, true); 770 } 771 772 static const struct dev_pm_ops csi2dc_dev_pm_ops = { 773 SET_RUNTIME_PM_OPS(csi2dc_runtime_suspend, csi2dc_runtime_resume, NULL) 774 }; 775 776 static const struct of_device_id csi2dc_of_match[] = { 777 { .compatible = "microchip,sama7g5-csi2dc" }, 778 { } 779 }; 780 781 MODULE_DEVICE_TABLE(of, csi2dc_of_match); 782 783 static struct platform_driver csi2dc_driver = { 784 .probe = csi2dc_probe, 785 .remove = csi2dc_remove, 786 .driver = { 787 .name = "microchip-csi2dc", 788 .pm = &csi2dc_dev_pm_ops, 789 .of_match_table = of_match_ptr(csi2dc_of_match), 790 }, 791 }; 792 793 module_platform_driver(csi2dc_driver); 794 795 MODULE_AUTHOR("Eugen Hristev <eugen.hristev@microchip.com>"); 796 MODULE_DESCRIPTION("Microchip CSI2 Demux Controller driver"); 797 MODULE_LICENSE("GPL v2"); 798