1 /* 2 * TI OMAP4 ISS V4L2 Driver - ISP IPIPE module 3 * 4 * Copyright (C) 2012 Texas Instruments, Inc. 5 * 6 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 */ 13 14 #include <linux/module.h> 15 #include <linux/uaccess.h> 16 #include <linux/delay.h> 17 #include <linux/device.h> 18 #include <linux/dma-mapping.h> 19 #include <linux/mm.h> 20 #include <linux/sched.h> 21 22 #include "iss.h" 23 #include "iss_regs.h" 24 #include "iss_ipipe.h" 25 26 static struct v4l2_mbus_framefmt * 27 __ipipe_get_format(struct iss_ipipe_device *ipipe, 28 struct v4l2_subdev_pad_config *cfg, 29 unsigned int pad, 30 enum v4l2_subdev_format_whence which); 31 32 static const unsigned int ipipe_fmts[] = { 33 MEDIA_BUS_FMT_SGRBG10_1X10, 34 MEDIA_BUS_FMT_SRGGB10_1X10, 35 MEDIA_BUS_FMT_SBGGR10_1X10, 36 MEDIA_BUS_FMT_SGBRG10_1X10, 37 }; 38 39 /* 40 * ipipe_print_status - Print current IPIPE Module register values. 41 * @ipipe: Pointer to ISS ISP IPIPE device. 42 * 43 * Also prints other debug information stored in the IPIPE module. 44 */ 45 #define IPIPE_PRINT_REGISTER(iss, name)\ 46 dev_dbg(iss->dev, "###IPIPE " #name "=0x%08x\n", \ 47 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_##name)) 48 49 static void ipipe_print_status(struct iss_ipipe_device *ipipe) 50 { 51 struct iss_device *iss = to_iss_device(ipipe); 52 53 dev_dbg(iss->dev, "-------------IPIPE Register dump-------------\n"); 54 55 IPIPE_PRINT_REGISTER(iss, SRC_EN); 56 IPIPE_PRINT_REGISTER(iss, SRC_MODE); 57 IPIPE_PRINT_REGISTER(iss, SRC_FMT); 58 IPIPE_PRINT_REGISTER(iss, SRC_COL); 59 IPIPE_PRINT_REGISTER(iss, SRC_VPS); 60 IPIPE_PRINT_REGISTER(iss, SRC_VSZ); 61 IPIPE_PRINT_REGISTER(iss, SRC_HPS); 62 IPIPE_PRINT_REGISTER(iss, SRC_HSZ); 63 IPIPE_PRINT_REGISTER(iss, GCK_MMR); 64 IPIPE_PRINT_REGISTER(iss, YUV_PHS); 65 66 dev_dbg(iss->dev, "-----------------------------------------------\n"); 67 } 68 69 /* 70 * ipipe_enable - Enable/Disable IPIPE. 71 * @enable: enable flag 72 * 73 */ 74 static void ipipe_enable(struct iss_ipipe_device *ipipe, u8 enable) 75 { 76 struct iss_device *iss = to_iss_device(ipipe); 77 78 iss_reg_update(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_EN, 79 IPIPE_SRC_EN_EN, enable ? IPIPE_SRC_EN_EN : 0); 80 } 81 82 /* ----------------------------------------------------------------------------- 83 * Format- and pipeline-related configuration helpers 84 */ 85 86 static void ipipe_configure(struct iss_ipipe_device *ipipe) 87 { 88 struct iss_device *iss = to_iss_device(ipipe); 89 struct v4l2_mbus_framefmt *format; 90 91 /* IPIPE_PAD_SINK */ 92 format = &ipipe->formats[IPIPE_PAD_SINK]; 93 94 /* NOTE: Currently just supporting pipeline IN: RGB, OUT: YUV422 */ 95 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_FMT, 96 IPIPE_SRC_FMT_RAW2YUV); 97 98 /* Enable YUV444 -> YUV422 conversion */ 99 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_YUV_PHS, 100 IPIPE_YUV_PHS_LPF); 101 102 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_VPS, 0); 103 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_HPS, 0); 104 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_VSZ, 105 (format->height - 2) & IPIPE_SRC_VSZ_MASK); 106 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_HSZ, 107 (format->width - 1) & IPIPE_SRC_HSZ_MASK); 108 109 /* Ignore ipipeif_wrt signal, and operate on-the-fly. */ 110 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_MODE, 111 IPIPE_SRC_MODE_WRT | IPIPE_SRC_MODE_OST); 112 113 /* HACK: Values tuned for Ducati SW (OV) */ 114 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_COL, 115 IPIPE_SRC_COL_EE_B | IPIPE_SRC_COL_EO_GB | 116 IPIPE_SRC_COL_OE_GR | IPIPE_SRC_COL_OO_R); 117 118 /* IPIPE_PAD_SOURCE_VP */ 119 format = &ipipe->formats[IPIPE_PAD_SOURCE_VP]; 120 /* Do nothing? */ 121 } 122 123 /* ----------------------------------------------------------------------------- 124 * V4L2 subdev operations 125 */ 126 127 /* 128 * ipipe_set_stream - Enable/Disable streaming on the IPIPE module 129 * @sd: ISP IPIPE V4L2 subdevice 130 * @enable: Enable/disable stream 131 */ 132 static int ipipe_set_stream(struct v4l2_subdev *sd, int enable) 133 { 134 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); 135 struct iss_device *iss = to_iss_device(ipipe); 136 int ret = 0; 137 138 if (ipipe->state == ISS_PIPELINE_STREAM_STOPPED) { 139 if (enable == ISS_PIPELINE_STREAM_STOPPED) 140 return 0; 141 142 omap4iss_isp_subclk_enable(iss, OMAP4_ISS_ISP_SUBCLK_IPIPE); 143 144 /* Enable clk_arm_g0 */ 145 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_GCK_MMR, 146 IPIPE_GCK_MMR_REG); 147 148 /* Enable clk_pix_g[3:0] */ 149 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_GCK_PIX, 150 IPIPE_GCK_PIX_G3 | IPIPE_GCK_PIX_G2 | 151 IPIPE_GCK_PIX_G1 | IPIPE_GCK_PIX_G0); 152 } 153 154 switch (enable) { 155 case ISS_PIPELINE_STREAM_CONTINUOUS: 156 157 ipipe_configure(ipipe); 158 ipipe_print_status(ipipe); 159 160 atomic_set(&ipipe->stopping, 0); 161 ipipe_enable(ipipe, 1); 162 break; 163 164 case ISS_PIPELINE_STREAM_STOPPED: 165 if (ipipe->state == ISS_PIPELINE_STREAM_STOPPED) 166 return 0; 167 if (omap4iss_module_sync_idle(&sd->entity, &ipipe->wait, 168 &ipipe->stopping)) 169 ret = -ETIMEDOUT; 170 171 ipipe_enable(ipipe, 0); 172 omap4iss_isp_subclk_disable(iss, OMAP4_ISS_ISP_SUBCLK_IPIPE); 173 break; 174 } 175 176 ipipe->state = enable; 177 return ret; 178 } 179 180 static struct v4l2_mbus_framefmt * 181 __ipipe_get_format(struct iss_ipipe_device *ipipe, 182 struct v4l2_subdev_pad_config *cfg, 183 unsigned int pad, 184 enum v4l2_subdev_format_whence which) 185 { 186 if (which == V4L2_SUBDEV_FORMAT_TRY) 187 return v4l2_subdev_get_try_format(&ipipe->subdev, cfg, pad); 188 189 return &ipipe->formats[pad]; 190 } 191 192 /* 193 * ipipe_try_format - Try video format on a pad 194 * @ipipe: ISS IPIPE device 195 * @cfg: V4L2 subdev pad config 196 * @pad: Pad number 197 * @fmt: Format 198 */ 199 static void 200 ipipe_try_format(struct iss_ipipe_device *ipipe, 201 struct v4l2_subdev_pad_config *cfg, 202 unsigned int pad, 203 struct v4l2_mbus_framefmt *fmt, 204 enum v4l2_subdev_format_whence which) 205 { 206 struct v4l2_mbus_framefmt *format; 207 unsigned int width = fmt->width; 208 unsigned int height = fmt->height; 209 unsigned int i; 210 211 switch (pad) { 212 case IPIPE_PAD_SINK: 213 for (i = 0; i < ARRAY_SIZE(ipipe_fmts); i++) { 214 if (fmt->code == ipipe_fmts[i]) 215 break; 216 } 217 218 /* If not found, use SGRBG10 as default */ 219 if (i >= ARRAY_SIZE(ipipe_fmts)) 220 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; 221 222 /* Clamp the input size. */ 223 fmt->width = clamp_t(u32, width, 1, 8192); 224 fmt->height = clamp_t(u32, height, 1, 8192); 225 fmt->colorspace = V4L2_COLORSPACE_SRGB; 226 break; 227 228 case IPIPE_PAD_SOURCE_VP: 229 format = __ipipe_get_format(ipipe, cfg, IPIPE_PAD_SINK, which); 230 memcpy(fmt, format, sizeof(*fmt)); 231 232 fmt->code = MEDIA_BUS_FMT_UYVY8_1X16; 233 fmt->width = clamp_t(u32, width, 32, fmt->width); 234 fmt->height = clamp_t(u32, height, 32, fmt->height); 235 fmt->colorspace = V4L2_COLORSPACE_JPEG; 236 break; 237 } 238 239 fmt->field = V4L2_FIELD_NONE; 240 } 241 242 /* 243 * ipipe_enum_mbus_code - Handle pixel format enumeration 244 * @sd : pointer to v4l2 subdev structure 245 * @cfg : V4L2 subdev pad config 246 * @code : pointer to v4l2_subdev_mbus_code_enum structure 247 * return -EINVAL or zero on success 248 */ 249 static int ipipe_enum_mbus_code(struct v4l2_subdev *sd, 250 struct v4l2_subdev_pad_config *cfg, 251 struct v4l2_subdev_mbus_code_enum *code) 252 { 253 switch (code->pad) { 254 case IPIPE_PAD_SINK: 255 if (code->index >= ARRAY_SIZE(ipipe_fmts)) 256 return -EINVAL; 257 258 code->code = ipipe_fmts[code->index]; 259 break; 260 261 case IPIPE_PAD_SOURCE_VP: 262 /* FIXME: Forced format conversion inside IPIPE ? */ 263 if (code->index != 0) 264 return -EINVAL; 265 266 code->code = MEDIA_BUS_FMT_UYVY8_1X16; 267 break; 268 269 default: 270 return -EINVAL; 271 } 272 273 return 0; 274 } 275 276 static int ipipe_enum_frame_size(struct v4l2_subdev *sd, 277 struct v4l2_subdev_pad_config *cfg, 278 struct v4l2_subdev_frame_size_enum *fse) 279 { 280 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); 281 struct v4l2_mbus_framefmt format; 282 283 if (fse->index != 0) 284 return -EINVAL; 285 286 format.code = fse->code; 287 format.width = 1; 288 format.height = 1; 289 ipipe_try_format(ipipe, cfg, fse->pad, &format, fse->which); 290 fse->min_width = format.width; 291 fse->min_height = format.height; 292 293 if (format.code != fse->code) 294 return -EINVAL; 295 296 format.code = fse->code; 297 format.width = -1; 298 format.height = -1; 299 ipipe_try_format(ipipe, cfg, fse->pad, &format, fse->which); 300 fse->max_width = format.width; 301 fse->max_height = format.height; 302 303 return 0; 304 } 305 306 /* 307 * ipipe_get_format - Retrieve the video format on a pad 308 * @sd : ISP IPIPE V4L2 subdevice 309 * @cfg: V4L2 subdev pad config 310 * @fmt: Format 311 * 312 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond 313 * to the format type. 314 */ 315 static int ipipe_get_format(struct v4l2_subdev *sd, 316 struct v4l2_subdev_pad_config *cfg, 317 struct v4l2_subdev_format *fmt) 318 { 319 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); 320 struct v4l2_mbus_framefmt *format; 321 322 format = __ipipe_get_format(ipipe, cfg, fmt->pad, fmt->which); 323 if (!format) 324 return -EINVAL; 325 326 fmt->format = *format; 327 return 0; 328 } 329 330 /* 331 * ipipe_set_format - Set the video format on a pad 332 * @sd : ISP IPIPE V4L2 subdevice 333 * @cfg: V4L2 subdev pad config 334 * @fmt: Format 335 * 336 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond 337 * to the format type. 338 */ 339 static int ipipe_set_format(struct v4l2_subdev *sd, 340 struct v4l2_subdev_pad_config *cfg, 341 struct v4l2_subdev_format *fmt) 342 { 343 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); 344 struct v4l2_mbus_framefmt *format; 345 346 format = __ipipe_get_format(ipipe, cfg, fmt->pad, fmt->which); 347 if (!format) 348 return -EINVAL; 349 350 ipipe_try_format(ipipe, cfg, fmt->pad, &fmt->format, fmt->which); 351 *format = fmt->format; 352 353 /* Propagate the format from sink to source */ 354 if (fmt->pad == IPIPE_PAD_SINK) { 355 format = __ipipe_get_format(ipipe, cfg, IPIPE_PAD_SOURCE_VP, 356 fmt->which); 357 *format = fmt->format; 358 ipipe_try_format(ipipe, cfg, IPIPE_PAD_SOURCE_VP, format, 359 fmt->which); 360 } 361 362 return 0; 363 } 364 365 static int ipipe_link_validate(struct v4l2_subdev *sd, struct media_link *link, 366 struct v4l2_subdev_format *source_fmt, 367 struct v4l2_subdev_format *sink_fmt) 368 { 369 /* Check if the two ends match */ 370 if (source_fmt->format.width != sink_fmt->format.width || 371 source_fmt->format.height != sink_fmt->format.height) 372 return -EPIPE; 373 374 if (source_fmt->format.code != sink_fmt->format.code) 375 return -EPIPE; 376 377 return 0; 378 } 379 380 /* 381 * ipipe_init_formats - Initialize formats on all pads 382 * @sd: ISP IPIPE V4L2 subdevice 383 * @fh: V4L2 subdev file handle 384 * 385 * Initialize all pad formats with default values. If fh is not NULL, try 386 * formats are initialized on the file handle. Otherwise active formats are 387 * initialized on the device. 388 */ 389 static int ipipe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) 390 { 391 struct v4l2_subdev_format format; 392 393 memset(&format, 0, sizeof(format)); 394 format.pad = IPIPE_PAD_SINK; 395 format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; 396 format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10; 397 format.format.width = 4096; 398 format.format.height = 4096; 399 ipipe_set_format(sd, fh ? fh->pad : NULL, &format); 400 401 return 0; 402 } 403 404 /* V4L2 subdev video operations */ 405 static const struct v4l2_subdev_video_ops ipipe_v4l2_video_ops = { 406 .s_stream = ipipe_set_stream, 407 }; 408 409 /* V4L2 subdev pad operations */ 410 static const struct v4l2_subdev_pad_ops ipipe_v4l2_pad_ops = { 411 .enum_mbus_code = ipipe_enum_mbus_code, 412 .enum_frame_size = ipipe_enum_frame_size, 413 .get_fmt = ipipe_get_format, 414 .set_fmt = ipipe_set_format, 415 .link_validate = ipipe_link_validate, 416 }; 417 418 /* V4L2 subdev operations */ 419 static const struct v4l2_subdev_ops ipipe_v4l2_ops = { 420 .video = &ipipe_v4l2_video_ops, 421 .pad = &ipipe_v4l2_pad_ops, 422 }; 423 424 /* V4L2 subdev internal operations */ 425 static const struct v4l2_subdev_internal_ops ipipe_v4l2_internal_ops = { 426 .open = ipipe_init_formats, 427 }; 428 429 /* ----------------------------------------------------------------------------- 430 * Media entity operations 431 */ 432 433 /* 434 * ipipe_link_setup - Setup IPIPE connections 435 * @entity: IPIPE media entity 436 * @local: Pad at the local end of the link 437 * @remote: Pad at the remote end of the link 438 * @flags: Link flags 439 * 440 * return -EINVAL or zero on success 441 */ 442 static int ipipe_link_setup(struct media_entity *entity, 443 const struct media_pad *local, 444 const struct media_pad *remote, u32 flags) 445 { 446 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 447 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); 448 struct iss_device *iss = to_iss_device(ipipe); 449 450 if (!is_media_entity_v4l2_subdev(remote->entity)) 451 return -EINVAL; 452 453 switch (local->index) { 454 case IPIPE_PAD_SINK: 455 /* Read from IPIPEIF. */ 456 if (!(flags & MEDIA_LNK_FL_ENABLED)) { 457 ipipe->input = IPIPE_INPUT_NONE; 458 break; 459 } 460 461 if (ipipe->input != IPIPE_INPUT_NONE) 462 return -EBUSY; 463 464 if (remote->entity == &iss->ipipeif.subdev.entity) 465 ipipe->input = IPIPE_INPUT_IPIPEIF; 466 467 break; 468 469 case IPIPE_PAD_SOURCE_VP: 470 /* Send to RESIZER */ 471 if (flags & MEDIA_LNK_FL_ENABLED) { 472 if (ipipe->output & ~IPIPE_OUTPUT_VP) 473 return -EBUSY; 474 ipipe->output |= IPIPE_OUTPUT_VP; 475 } else { 476 ipipe->output &= ~IPIPE_OUTPUT_VP; 477 } 478 break; 479 480 default: 481 return -EINVAL; 482 } 483 484 return 0; 485 } 486 487 /* media operations */ 488 static const struct media_entity_operations ipipe_media_ops = { 489 .link_setup = ipipe_link_setup, 490 .link_validate = v4l2_subdev_link_validate, 491 }; 492 493 /* 494 * ipipe_init_entities - Initialize V4L2 subdev and media entity 495 * @ipipe: ISS ISP IPIPE module 496 * 497 * Return 0 on success and a negative error code on failure. 498 */ 499 static int ipipe_init_entities(struct iss_ipipe_device *ipipe) 500 { 501 struct v4l2_subdev *sd = &ipipe->subdev; 502 struct media_pad *pads = ipipe->pads; 503 struct media_entity *me = &sd->entity; 504 int ret; 505 506 ipipe->input = IPIPE_INPUT_NONE; 507 508 v4l2_subdev_init(sd, &ipipe_v4l2_ops); 509 sd->internal_ops = &ipipe_v4l2_internal_ops; 510 strlcpy(sd->name, "OMAP4 ISS ISP IPIPE", sizeof(sd->name)); 511 sd->grp_id = 1 << 16; /* group ID for iss subdevs */ 512 v4l2_set_subdevdata(sd, ipipe); 513 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 514 515 pads[IPIPE_PAD_SINK].flags = MEDIA_PAD_FL_SINK; 516 pads[IPIPE_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE; 517 518 me->ops = &ipipe_media_ops; 519 ret = media_entity_pads_init(me, IPIPE_PADS_NUM, pads); 520 if (ret < 0) 521 return ret; 522 523 ipipe_init_formats(sd, NULL); 524 525 return 0; 526 } 527 528 void omap4iss_ipipe_unregister_entities(struct iss_ipipe_device *ipipe) 529 { 530 v4l2_device_unregister_subdev(&ipipe->subdev); 531 } 532 533 int omap4iss_ipipe_register_entities(struct iss_ipipe_device *ipipe, 534 struct v4l2_device *vdev) 535 { 536 int ret; 537 538 /* Register the subdev and video node. */ 539 ret = v4l2_device_register_subdev(vdev, &ipipe->subdev); 540 if (ret < 0) 541 goto error; 542 543 return 0; 544 545 error: 546 omap4iss_ipipe_unregister_entities(ipipe); 547 return ret; 548 } 549 550 /* ----------------------------------------------------------------------------- 551 * ISP IPIPE initialisation and cleanup 552 */ 553 554 /* 555 * omap4iss_ipipe_init - IPIPE module initialization. 556 * @iss: Device pointer specific to the OMAP4 ISS. 557 * 558 * TODO: Get the initialisation values from platform data. 559 * 560 * Return 0 on success or a negative error code otherwise. 561 */ 562 int omap4iss_ipipe_init(struct iss_device *iss) 563 { 564 struct iss_ipipe_device *ipipe = &iss->ipipe; 565 566 ipipe->state = ISS_PIPELINE_STREAM_STOPPED; 567 init_waitqueue_head(&ipipe->wait); 568 569 return ipipe_init_entities(ipipe); 570 } 571 572 /* 573 * omap4iss_ipipe_cleanup - IPIPE module cleanup. 574 * @iss: Device pointer specific to the OMAP4 ISS. 575 */ 576 void omap4iss_ipipe_cleanup(struct iss_device *iss) 577 { 578 struct iss_ipipe_device *ipipe = &iss->ipipe; 579 580 media_entity_cleanup(&ipipe->subdev.entity); 581 } 582