1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * This is the driver for the STA2x11 Video Input Port. 4 * 5 * Copyright (C) 2012 ST Microelectronics 6 * author: Federico Vaga <federico.vaga@gmail.com> 7 * Copyright (C) 2010 WindRiver Systems, Inc. 8 * authors: Andreas Kies <andreas.kies@windriver.com> 9 * Vlad Lungu <vlad.lungu@windriver.com> 10 */ 11 12 #include <linux/types.h> 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/init.h> 16 #include <linux/videodev2.h> 17 #include <linux/kmod.h> 18 #include <linux/pci.h> 19 #include <linux/interrupt.h> 20 #include <linux/io.h> 21 #include <linux/gpio.h> 22 #include <linux/i2c.h> 23 #include <linux/delay.h> 24 #include <media/v4l2-common.h> 25 #include <media/v4l2-device.h> 26 #include <media/v4l2-ctrls.h> 27 #include <media/v4l2-ioctl.h> 28 #include <media/v4l2-fh.h> 29 #include <media/v4l2-event.h> 30 #include <media/videobuf2-dma-contig.h> 31 32 #include "sta2x11_vip.h" 33 34 #define DRV_VERSION "1.3" 35 36 #ifndef PCI_DEVICE_ID_STMICRO_VIP 37 #define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D 38 #endif 39 40 #define MAX_FRAMES 4 41 42 /*Register offsets*/ 43 #define DVP_CTL 0x00 44 #define DVP_TFO 0x04 45 #define DVP_TFS 0x08 46 #define DVP_BFO 0x0C 47 #define DVP_BFS 0x10 48 #define DVP_VTP 0x14 49 #define DVP_VBP 0x18 50 #define DVP_VMP 0x1C 51 #define DVP_ITM 0x98 52 #define DVP_ITS 0x9C 53 #define DVP_STA 0xA0 54 #define DVP_HLFLN 0xA8 55 #define DVP_RGB 0xC0 56 #define DVP_PKZ 0xF0 57 58 /*Register fields*/ 59 #define DVP_CTL_ENA 0x00000001 60 #define DVP_CTL_RST 0x80000000 61 #define DVP_CTL_DIS (~0x00040001) 62 63 #define DVP_IT_VSB 0x00000008 64 #define DVP_IT_VST 0x00000010 65 #define DVP_IT_FIFO 0x00000020 66 67 #define DVP_HLFLN_SD 0x00000001 68 69 #define SAVE_COUNT 8 70 #define AUX_COUNT 3 71 #define IRQ_COUNT 1 72 73 74 struct vip_buffer { 75 struct vb2_v4l2_buffer vb; 76 struct list_head list; 77 dma_addr_t dma; 78 }; 79 static inline struct vip_buffer *to_vip_buffer(struct vb2_v4l2_buffer *vb2) 80 { 81 return container_of(vb2, struct vip_buffer, vb); 82 } 83 84 /** 85 * struct sta2x11_vip - All internal data for one instance of device 86 * @v4l2_dev: device registered in v4l layer 87 * @video_dev: properties of our device 88 * @pdev: PCI device 89 * @adapter: contains I2C adapter information 90 * @register_save_area: All relevant register are saved here during suspend 91 * @decoder: contains information about video DAC 92 * @ctrl_hdl: handler for control framework 93 * @format: pixel format, fixed UYVY 94 * @std: video standard (e.g. PAL/NTSC) 95 * @input: input line for video signal ( 0 or 1 ) 96 * @disabled: Device is in power down state 97 * @slock: for excluse access of registers 98 * @vb_vidq: queue maintained by videobuf2 layer 99 * @buffer_list: list of buffer in use 100 * @sequence: sequence number of acquired buffer 101 * @active: current active buffer 102 * @lock: used in videobuf2 callback 103 * @v4l_lock: serialize its video4linux ioctls 104 * @tcount: Number of top frames 105 * @bcount: Number of bottom frames 106 * @overflow: Number of FIFO overflows 107 * @iomem: hardware base address 108 * @config: I2C and gpio config from platform 109 * 110 * All non-local data is accessed via this structure. 111 */ 112 struct sta2x11_vip { 113 struct v4l2_device v4l2_dev; 114 struct video_device video_dev; 115 struct pci_dev *pdev; 116 struct i2c_adapter *adapter; 117 unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT]; 118 struct v4l2_subdev *decoder; 119 struct v4l2_ctrl_handler ctrl_hdl; 120 121 122 struct v4l2_pix_format format; 123 v4l2_std_id std; 124 unsigned int input; 125 int disabled; 126 spinlock_t slock; 127 128 struct vb2_queue vb_vidq; 129 struct list_head buffer_list; 130 unsigned int sequence; 131 struct vip_buffer *active; /* current active buffer */ 132 spinlock_t lock; /* Used in videobuf2 callback */ 133 struct mutex v4l_lock; 134 135 /* Interrupt counters */ 136 int tcount, bcount; 137 int overflow; 138 139 void __iomem *iomem; /* I/O Memory */ 140 struct vip_config *config; 141 }; 142 143 static const unsigned int registers_to_save[AUX_COUNT] = { 144 DVP_HLFLN, DVP_RGB, DVP_PKZ 145 }; 146 147 static struct v4l2_pix_format formats_50[] = { 148 { /*PAL interlaced */ 149 .width = 720, 150 .height = 576, 151 .pixelformat = V4L2_PIX_FMT_UYVY, 152 .field = V4L2_FIELD_INTERLACED, 153 .bytesperline = 720 * 2, 154 .sizeimage = 720 * 2 * 576, 155 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 156 { /*PAL top */ 157 .width = 720, 158 .height = 288, 159 .pixelformat = V4L2_PIX_FMT_UYVY, 160 .field = V4L2_FIELD_TOP, 161 .bytesperline = 720 * 2, 162 .sizeimage = 720 * 2 * 288, 163 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 164 { /*PAL bottom */ 165 .width = 720, 166 .height = 288, 167 .pixelformat = V4L2_PIX_FMT_UYVY, 168 .field = V4L2_FIELD_BOTTOM, 169 .bytesperline = 720 * 2, 170 .sizeimage = 720 * 2 * 288, 171 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 172 173 }; 174 175 static struct v4l2_pix_format formats_60[] = { 176 { /*NTSC interlaced */ 177 .width = 720, 178 .height = 480, 179 .pixelformat = V4L2_PIX_FMT_UYVY, 180 .field = V4L2_FIELD_INTERLACED, 181 .bytesperline = 720 * 2, 182 .sizeimage = 720 * 2 * 480, 183 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 184 { /*NTSC top */ 185 .width = 720, 186 .height = 240, 187 .pixelformat = V4L2_PIX_FMT_UYVY, 188 .field = V4L2_FIELD_TOP, 189 .bytesperline = 720 * 2, 190 .sizeimage = 720 * 2 * 240, 191 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 192 { /*NTSC bottom */ 193 .width = 720, 194 .height = 240, 195 .pixelformat = V4L2_PIX_FMT_UYVY, 196 .field = V4L2_FIELD_BOTTOM, 197 .bytesperline = 720 * 2, 198 .sizeimage = 720 * 2 * 240, 199 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 200 }; 201 202 /* Write VIP register */ 203 static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val) 204 { 205 iowrite32((val), (vip->iomem)+(reg)); 206 } 207 /* Read VIP register */ 208 static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg) 209 { 210 return ioread32((vip->iomem)+(reg)); 211 } 212 /* Start DMA acquisition */ 213 static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf) 214 { 215 unsigned long offset = 0; 216 217 if (vip->format.field == V4L2_FIELD_INTERLACED) 218 offset = vip->format.width * 2; 219 220 spin_lock_irq(&vip->slock); 221 /* Enable acquisition */ 222 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) | DVP_CTL_ENA); 223 /* Set Top and Bottom Field memory address */ 224 reg_write(vip, DVP_VTP, (u32)vip_buf->dma); 225 reg_write(vip, DVP_VBP, (u32)vip_buf->dma + offset); 226 spin_unlock_irq(&vip->slock); 227 } 228 229 /* Fetch the next buffer to activate */ 230 static void vip_active_buf_next(struct sta2x11_vip *vip) 231 { 232 /* Get the next buffer */ 233 spin_lock(&vip->lock); 234 if (list_empty(&vip->buffer_list)) {/* No available buffer */ 235 spin_unlock(&vip->lock); 236 return; 237 } 238 vip->active = list_first_entry(&vip->buffer_list, 239 struct vip_buffer, 240 list); 241 /* Reset Top and Bottom counter */ 242 vip->tcount = 0; 243 vip->bcount = 0; 244 spin_unlock(&vip->lock); 245 if (vb2_is_streaming(&vip->vb_vidq)) { /* streaming is on */ 246 start_dma(vip, vip->active); /* start dma capture */ 247 } 248 } 249 250 251 /* Videobuf2 Operations */ 252 static int queue_setup(struct vb2_queue *vq, 253 unsigned int *nbuffers, unsigned int *nplanes, 254 unsigned int sizes[], struct device *alloc_devs[]) 255 { 256 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 257 258 if (!(*nbuffers) || *nbuffers < MAX_FRAMES) 259 *nbuffers = MAX_FRAMES; 260 261 *nplanes = 1; 262 sizes[0] = vip->format.sizeimage; 263 264 vip->sequence = 0; 265 vip->active = NULL; 266 vip->tcount = 0; 267 vip->bcount = 0; 268 269 return 0; 270 }; 271 static int buffer_init(struct vb2_buffer *vb) 272 { 273 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 274 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 275 276 vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, 0); 277 INIT_LIST_HEAD(&vip_buf->list); 278 return 0; 279 } 280 281 static int buffer_prepare(struct vb2_buffer *vb) 282 { 283 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 284 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 285 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 286 unsigned long size; 287 288 size = vip->format.sizeimage; 289 if (vb2_plane_size(vb, 0) < size) { 290 v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n", 291 vb2_plane_size(vb, 0), size); 292 return -EINVAL; 293 } 294 295 vb2_set_plane_payload(&vip_buf->vb.vb2_buf, 0, size); 296 297 return 0; 298 } 299 static void buffer_queue(struct vb2_buffer *vb) 300 { 301 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 302 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 303 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 304 305 spin_lock(&vip->lock); 306 list_add_tail(&vip_buf->list, &vip->buffer_list); 307 if (!vip->active) { /* No active buffer, active the first one */ 308 vip->active = list_first_entry(&vip->buffer_list, 309 struct vip_buffer, 310 list); 311 if (vb2_is_streaming(&vip->vb_vidq)) /* streaming is on */ 312 start_dma(vip, vip_buf); /* start dma capture */ 313 } 314 spin_unlock(&vip->lock); 315 } 316 static void buffer_finish(struct vb2_buffer *vb) 317 { 318 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 319 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 320 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 321 322 /* Buffer handled, remove it from the list */ 323 spin_lock(&vip->lock); 324 list_del_init(&vip_buf->list); 325 spin_unlock(&vip->lock); 326 327 if (vb2_is_streaming(vb->vb2_queue)) 328 vip_active_buf_next(vip); 329 } 330 331 static int start_streaming(struct vb2_queue *vq, unsigned int count) 332 { 333 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 334 335 spin_lock_irq(&vip->slock); 336 /* Enable interrupt VSYNC Top and Bottom*/ 337 reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST); 338 spin_unlock_irq(&vip->slock); 339 340 if (count) 341 start_dma(vip, vip->active); 342 343 return 0; 344 } 345 346 /* abort streaming and wait for last buffer */ 347 static void stop_streaming(struct vb2_queue *vq) 348 { 349 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 350 struct vip_buffer *vip_buf, *node; 351 352 /* Disable acquisition */ 353 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 354 /* Disable all interrupts */ 355 reg_write(vip, DVP_ITM, 0); 356 357 /* Release all active buffers */ 358 spin_lock(&vip->lock); 359 list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) { 360 vb2_buffer_done(&vip_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 361 list_del(&vip_buf->list); 362 } 363 spin_unlock(&vip->lock); 364 } 365 366 static const struct vb2_ops vip_video_qops = { 367 .queue_setup = queue_setup, 368 .buf_init = buffer_init, 369 .buf_prepare = buffer_prepare, 370 .buf_finish = buffer_finish, 371 .buf_queue = buffer_queue, 372 .start_streaming = start_streaming, 373 .stop_streaming = stop_streaming, 374 .wait_prepare = vb2_ops_wait_prepare, 375 .wait_finish = vb2_ops_wait_finish, 376 }; 377 378 379 /* File Operations */ 380 static const struct v4l2_file_operations vip_fops = { 381 .owner = THIS_MODULE, 382 .open = v4l2_fh_open, 383 .release = vb2_fop_release, 384 .unlocked_ioctl = video_ioctl2, 385 .read = vb2_fop_read, 386 .mmap = vb2_fop_mmap, 387 .poll = vb2_fop_poll 388 }; 389 390 391 /** 392 * vidioc_querycap - return capabilities of device 393 * @file: descriptor of device 394 * @cap: contains return values 395 * @priv: unused 396 * 397 * the capabilities of the device are returned 398 * 399 * return value: 0, no error. 400 */ 401 static int vidioc_querycap(struct file *file, void *priv, 402 struct v4l2_capability *cap) 403 { 404 struct sta2x11_vip *vip = video_drvdata(file); 405 406 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); 407 strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card)); 408 snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s", 409 pci_name(vip->pdev)); 410 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 411 V4L2_CAP_STREAMING; 412 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 413 414 return 0; 415 } 416 417 /** 418 * vidioc_s_std - set video standard 419 * @file: descriptor of device 420 * @std: contains standard to be set 421 * @priv: unused 422 * 423 * the video standard is set 424 * 425 * return value: 0, no error. 426 * 427 * -EIO, no input signal detected 428 * 429 * other, returned from video DAC. 430 */ 431 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) 432 { 433 struct sta2x11_vip *vip = video_drvdata(file); 434 435 /* 436 * This is here for backwards compatibility only. 437 * The use of V4L2_STD_ALL to trigger a querystd is non-standard. 438 */ 439 if (std == V4L2_STD_ALL) { 440 v4l2_subdev_call(vip->decoder, video, querystd, &std); 441 if (std == V4L2_STD_UNKNOWN) 442 return -EIO; 443 } 444 445 if (vip->std != std) { 446 vip->std = std; 447 if (V4L2_STD_525_60 & std) 448 vip->format = formats_60[0]; 449 else 450 vip->format = formats_50[0]; 451 } 452 453 return v4l2_subdev_call(vip->decoder, video, s_std, std); 454 } 455 456 /** 457 * vidioc_g_std - get video standard 458 * @file: descriptor of device 459 * @priv: unused 460 * @std: contains return values 461 * 462 * the current video standard is returned 463 * 464 * return value: 0, no error. 465 */ 466 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) 467 { 468 struct sta2x11_vip *vip = video_drvdata(file); 469 470 *std = vip->std; 471 return 0; 472 } 473 474 /** 475 * vidioc_querystd - get possible video standards 476 * @file: descriptor of device 477 * @priv: unused 478 * @std: contains return values 479 * 480 * all possible video standards are returned 481 * 482 * return value: delivered by video DAC routine. 483 */ 484 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) 485 { 486 struct sta2x11_vip *vip = video_drvdata(file); 487 488 return v4l2_subdev_call(vip->decoder, video, querystd, std); 489 } 490 491 static int vidioc_enum_input(struct file *file, void *priv, 492 struct v4l2_input *inp) 493 { 494 if (inp->index > 1) 495 return -EINVAL; 496 497 inp->type = V4L2_INPUT_TYPE_CAMERA; 498 inp->std = V4L2_STD_ALL; 499 sprintf(inp->name, "Camera %u", inp->index); 500 501 return 0; 502 } 503 504 /** 505 * vidioc_s_input - set input line 506 * @file: descriptor of device 507 * @priv: unused 508 * @i: new input line number 509 * 510 * the current active input line is set 511 * 512 * return value: 0, no error. 513 * 514 * -EINVAL, line number out of range 515 */ 516 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 517 { 518 struct sta2x11_vip *vip = video_drvdata(file); 519 int ret; 520 521 if (i > 1) 522 return -EINVAL; 523 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); 524 525 if (!ret) 526 vip->input = i; 527 528 return 0; 529 } 530 531 /** 532 * vidioc_g_input - return input line 533 * @file: descriptor of device 534 * @priv: unused 535 * @i: returned input line number 536 * 537 * the current active input line is returned 538 * 539 * return value: always 0. 540 */ 541 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 542 { 543 struct sta2x11_vip *vip = video_drvdata(file); 544 545 *i = vip->input; 546 return 0; 547 } 548 549 /** 550 * vidioc_enum_fmt_vid_cap - return video capture format 551 * @file: descriptor of device 552 * @priv: unused 553 * @f: returned format information 554 * 555 * returns name and format of video capture 556 * Only UYVY is supported by hardware. 557 * 558 * return value: always 0. 559 */ 560 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 561 struct v4l2_fmtdesc *f) 562 { 563 564 if (f->index != 0) 565 return -EINVAL; 566 567 strscpy(f->description, "4:2:2, packed, UYVY", sizeof(f->description)); 568 f->pixelformat = V4L2_PIX_FMT_UYVY; 569 f->flags = 0; 570 return 0; 571 } 572 573 /** 574 * vidioc_try_fmt_vid_cap - set video capture format 575 * @file: descriptor of device 576 * @priv: unused 577 * @f: new format 578 * 579 * new video format is set which includes width and 580 * field type. width is fixed to 720, no scaling. 581 * Only UYVY is supported by this hardware. 582 * the minimum height is 200, the maximum is 576 (PAL) 583 * 584 * return value: 0, no error 585 * 586 * -EINVAL, pixel or field format not supported 587 * 588 */ 589 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 590 struct v4l2_format *f) 591 { 592 struct sta2x11_vip *vip = video_drvdata(file); 593 int interlace_lim; 594 595 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { 596 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n"); 597 return -EINVAL; 598 } 599 600 if (V4L2_STD_525_60 & vip->std) 601 interlace_lim = 240; 602 else 603 interlace_lim = 288; 604 605 switch (f->fmt.pix.field) { 606 default: 607 case V4L2_FIELD_ANY: 608 if (interlace_lim < f->fmt.pix.height) 609 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 610 else 611 f->fmt.pix.field = V4L2_FIELD_BOTTOM; 612 break; 613 case V4L2_FIELD_TOP: 614 case V4L2_FIELD_BOTTOM: 615 if (interlace_lim < f->fmt.pix.height) 616 f->fmt.pix.height = interlace_lim; 617 break; 618 case V4L2_FIELD_INTERLACED: 619 break; 620 } 621 622 /* It is the only supported format */ 623 f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; 624 f->fmt.pix.height &= ~1; 625 if (2 * interlace_lim < f->fmt.pix.height) 626 f->fmt.pix.height = 2 * interlace_lim; 627 if (200 > f->fmt.pix.height) 628 f->fmt.pix.height = 200; 629 f->fmt.pix.width = 720; 630 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 631 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; 632 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 633 return 0; 634 } 635 636 /** 637 * vidioc_s_fmt_vid_cap - set current video format parameters 638 * @file: descriptor of device 639 * @priv: unused 640 * @f: returned format information 641 * 642 * set new capture format 643 * return value: 0, no error 644 * 645 * other, delivered by video DAC routine. 646 */ 647 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 648 struct v4l2_format *f) 649 { 650 struct sta2x11_vip *vip = video_drvdata(file); 651 unsigned int t_stop, b_stop, pitch; 652 int ret; 653 654 ret = vidioc_try_fmt_vid_cap(file, priv, f); 655 if (ret) 656 return ret; 657 658 if (vb2_is_busy(&vip->vb_vidq)) { 659 /* Can't change format during acquisition */ 660 v4l2_err(&vip->v4l2_dev, "device busy\n"); 661 return -EBUSY; 662 } 663 vip->format = f->fmt.pix; 664 switch (vip->format.field) { 665 case V4L2_FIELD_INTERLACED: 666 t_stop = ((vip->format.height / 2 - 1) << 16) | 667 (2 * vip->format.width - 1); 668 b_stop = t_stop; 669 pitch = 4 * vip->format.width; 670 break; 671 case V4L2_FIELD_TOP: 672 t_stop = ((vip->format.height - 1) << 16) | 673 (2 * vip->format.width - 1); 674 b_stop = (0 << 16) | (2 * vip->format.width - 1); 675 pitch = 2 * vip->format.width; 676 break; 677 case V4L2_FIELD_BOTTOM: 678 t_stop = (0 << 16) | (2 * vip->format.width - 1); 679 b_stop = (vip->format.height << 16) | 680 (2 * vip->format.width - 1); 681 pitch = 2 * vip->format.width; 682 break; 683 default: 684 v4l2_err(&vip->v4l2_dev, "unknown field format\n"); 685 return -EINVAL; 686 } 687 688 spin_lock_irq(&vip->slock); 689 /* Y-X Top Field Offset */ 690 reg_write(vip, DVP_TFO, 0); 691 /* Y-X Bottom Field Offset */ 692 reg_write(vip, DVP_BFO, 0); 693 /* Y-X Top Field Stop*/ 694 reg_write(vip, DVP_TFS, t_stop); 695 /* Y-X Bottom Field Stop */ 696 reg_write(vip, DVP_BFS, b_stop); 697 /* Video Memory Pitch */ 698 reg_write(vip, DVP_VMP, pitch); 699 spin_unlock_irq(&vip->slock); 700 701 return 0; 702 } 703 704 /** 705 * vidioc_g_fmt_vid_cap - get current video format parameters 706 * @file: descriptor of device 707 * @priv: unused 708 * @f: contains format information 709 * 710 * returns current video format parameters 711 * 712 * return value: 0, always successful 713 */ 714 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 715 struct v4l2_format *f) 716 { 717 struct sta2x11_vip *vip = video_drvdata(file); 718 719 f->fmt.pix = vip->format; 720 721 return 0; 722 } 723 724 static const struct v4l2_ioctl_ops vip_ioctl_ops = { 725 .vidioc_querycap = vidioc_querycap, 726 /* FMT handling */ 727 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 728 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 729 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 730 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 731 /* Buffer handlers */ 732 .vidioc_create_bufs = vb2_ioctl_create_bufs, 733 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 734 .vidioc_reqbufs = vb2_ioctl_reqbufs, 735 .vidioc_querybuf = vb2_ioctl_querybuf, 736 .vidioc_qbuf = vb2_ioctl_qbuf, 737 .vidioc_dqbuf = vb2_ioctl_dqbuf, 738 /* Stream on/off */ 739 .vidioc_streamon = vb2_ioctl_streamon, 740 .vidioc_streamoff = vb2_ioctl_streamoff, 741 /* Standard handling */ 742 .vidioc_g_std = vidioc_g_std, 743 .vidioc_s_std = vidioc_s_std, 744 .vidioc_querystd = vidioc_querystd, 745 /* Input handling */ 746 .vidioc_enum_input = vidioc_enum_input, 747 .vidioc_g_input = vidioc_g_input, 748 .vidioc_s_input = vidioc_s_input, 749 /* Log status ioctl */ 750 .vidioc_log_status = v4l2_ctrl_log_status, 751 /* Event handling */ 752 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 753 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 754 }; 755 756 static const struct video_device video_dev_template = { 757 .name = KBUILD_MODNAME, 758 .release = video_device_release_empty, 759 .fops = &vip_fops, 760 .ioctl_ops = &vip_ioctl_ops, 761 .tvnorms = V4L2_STD_ALL, 762 }; 763 764 /** 765 * vip_irq - interrupt routine 766 * @irq: Number of interrupt ( not used, correct number is assumed ) 767 * @vip: local data structure containing all information 768 * 769 * check for both frame interrupts set ( top and bottom ). 770 * check FIFO overflow, but limit number of log messages after open. 771 * signal a complete buffer if done 772 * 773 * return value: IRQ_NONE, interrupt was not generated by VIP 774 * 775 * IRQ_HANDLED, interrupt done. 776 */ 777 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip) 778 { 779 unsigned int status; 780 781 status = reg_read(vip, DVP_ITS); 782 783 if (!status) /* No interrupt to handle */ 784 return IRQ_NONE; 785 786 if (status & DVP_IT_FIFO) 787 if (vip->overflow++ > 5) 788 pr_info("VIP: fifo overflow\n"); 789 790 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { 791 /* this is bad, we are too slow, hope the condition is gone 792 * on the next frame */ 793 return IRQ_HANDLED; 794 } 795 796 if (status & DVP_IT_VST) 797 if ((++vip->tcount) < 2) 798 return IRQ_HANDLED; 799 if (status & DVP_IT_VSB) { 800 vip->bcount++; 801 return IRQ_HANDLED; 802 } 803 804 if (vip->active) { /* Acquisition is over on this buffer */ 805 /* Disable acquisition */ 806 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 807 /* Remove the active buffer from the list */ 808 vip->active->vb.vb2_buf.timestamp = ktime_get_ns(); 809 vip->active->vb.sequence = vip->sequence++; 810 vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE); 811 } 812 813 return IRQ_HANDLED; 814 } 815 816 static void sta2x11_vip_init_register(struct sta2x11_vip *vip) 817 { 818 /* Register initialization */ 819 spin_lock_irq(&vip->slock); 820 /* Clean interrupt */ 821 reg_read(vip, DVP_ITS); 822 /* Enable Half Line per vertical */ 823 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); 824 /* Reset VIP control */ 825 reg_write(vip, DVP_CTL, DVP_CTL_RST); 826 /* Clear VIP control */ 827 reg_write(vip, DVP_CTL, 0); 828 spin_unlock_irq(&vip->slock); 829 } 830 static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) 831 { 832 spin_lock_irq(&vip->slock); 833 /* Disable interrupt */ 834 reg_write(vip, DVP_ITM, 0); 835 /* Reset VIP Control */ 836 reg_write(vip, DVP_CTL, DVP_CTL_RST); 837 /* Clear VIP Control */ 838 reg_write(vip, DVP_CTL, 0); 839 /* Clean VIP Interrupt */ 840 reg_read(vip, DVP_ITS); 841 spin_unlock_irq(&vip->slock); 842 } 843 static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) 844 { 845 int err; 846 847 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); 848 if (err) { 849 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); 850 return err; 851 } 852 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); 853 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 854 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; 855 vip->vb_vidq.drv_priv = vip; 856 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); 857 vip->vb_vidq.ops = &vip_video_qops; 858 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; 859 vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 860 vip->vb_vidq.dev = &vip->pdev->dev; 861 vip->vb_vidq.lock = &vip->v4l_lock; 862 err = vb2_queue_init(&vip->vb_vidq); 863 if (err) 864 return err; 865 INIT_LIST_HEAD(&vip->buffer_list); 866 spin_lock_init(&vip->lock); 867 return 0; 868 } 869 870 static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) 871 { 872 /* 873 * Inititialize an empty control so VIP can inerithing controls 874 * from ADV7180 875 */ 876 v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); 877 878 vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; 879 if (vip->ctrl_hdl.error) { 880 int err = vip->ctrl_hdl.error; 881 882 v4l2_ctrl_handler_free(&vip->ctrl_hdl); 883 return err; 884 } 885 886 return 0; 887 } 888 889 /** 890 * vip_gpio_reserve - reserve gpio pin 891 * @dev: device 892 * @pin: GPIO pin number 893 * @dir: direction, input or output 894 * @name: GPIO pin name 895 * 896 */ 897 static int vip_gpio_reserve(struct device *dev, int pin, int dir, 898 const char *name) 899 { 900 int ret = -ENODEV; 901 902 if (!gpio_is_valid(pin)) 903 return ret; 904 905 ret = gpio_request(pin, name); 906 if (ret) { 907 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); 908 return ret; 909 } 910 911 ret = gpio_direction_output(pin, dir); 912 if (ret) { 913 dev_err(dev, "Failed to set direction for pin %d (%s)\n", 914 pin, name); 915 gpio_free(pin); 916 return ret; 917 } 918 919 ret = gpio_export(pin, false); 920 if (ret) { 921 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); 922 gpio_free(pin); 923 return ret; 924 } 925 926 return 0; 927 } 928 929 /** 930 * vip_gpio_release - release gpio pin 931 * @dev: device 932 * @pin: GPIO pin number 933 * @name: GPIO pin name 934 * 935 */ 936 static void vip_gpio_release(struct device *dev, int pin, const char *name) 937 { 938 if (gpio_is_valid(pin)) { 939 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); 940 gpio_unexport(pin); 941 gpio_free(pin); 942 } 943 } 944 945 /** 946 * sta2x11_vip_init_one - init one instance of video device 947 * @pdev: PCI device 948 * @ent: (not used) 949 * 950 * allocate reset pins for DAC. 951 * Reset video DAC, this is done via reset line. 952 * allocate memory for managing device 953 * request interrupt 954 * map IO region 955 * register device 956 * find and initialize video DAC 957 * 958 * return value: 0, no error 959 * 960 * -ENOMEM, no memory 961 * 962 * -ENODEV, device could not be detected or registered 963 */ 964 static int sta2x11_vip_init_one(struct pci_dev *pdev, 965 const struct pci_device_id *ent) 966 { 967 int ret; 968 struct sta2x11_vip *vip; 969 struct vip_config *config; 970 971 /* Check if hardware support 26-bit DMA */ 972 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { 973 dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); 974 return -EINVAL; 975 } 976 /* Enable PCI */ 977 ret = pci_enable_device(pdev); 978 if (ret) 979 return ret; 980 981 /* Get VIP platform data */ 982 config = dev_get_platdata(&pdev->dev); 983 if (!config) { 984 dev_info(&pdev->dev, "VIP slot disabled\n"); 985 ret = -EINVAL; 986 goto disable; 987 } 988 989 /* Power configuration */ 990 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, 991 config->pwr_name); 992 if (ret) 993 goto disable; 994 995 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, 996 config->reset_name); 997 if (ret) { 998 vip_gpio_release(&pdev->dev, config->pwr_pin, 999 config->pwr_name); 1000 goto disable; 1001 } 1002 1003 if (gpio_is_valid(config->pwr_pin)) { 1004 /* Datasheet says 5ms between PWR and RST */ 1005 usleep_range(5000, 25000); 1006 gpio_direction_output(config->pwr_pin, 1); 1007 } 1008 1009 if (gpio_is_valid(config->reset_pin)) { 1010 /* Datasheet says 5ms between PWR and RST */ 1011 usleep_range(5000, 25000); 1012 gpio_direction_output(config->reset_pin, 1); 1013 } 1014 usleep_range(5000, 25000); 1015 1016 /* Allocate a new VIP instance */ 1017 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); 1018 if (!vip) { 1019 ret = -ENOMEM; 1020 goto release_gpios; 1021 } 1022 vip->pdev = pdev; 1023 vip->std = V4L2_STD_PAL; 1024 vip->format = formats_50[0]; 1025 vip->config = config; 1026 mutex_init(&vip->v4l_lock); 1027 1028 ret = sta2x11_vip_init_controls(vip); 1029 if (ret) 1030 goto free_mem; 1031 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); 1032 if (ret) 1033 goto free_mem; 1034 1035 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", 1036 (unsigned long)pci_resource_start(pdev, 0), 1037 (unsigned long)pci_resource_len(pdev, 0), pdev->irq); 1038 1039 pci_set_master(pdev); 1040 1041 ret = pci_request_regions(pdev, KBUILD_MODNAME); 1042 if (ret) 1043 goto unreg; 1044 1045 vip->iomem = pci_iomap(pdev, 0, 0x100); 1046 if (!vip->iomem) { 1047 ret = -ENOMEM; 1048 goto release; 1049 } 1050 1051 pci_enable_msi(pdev); 1052 1053 /* Initialize buffer */ 1054 ret = sta2x11_vip_init_buffer(vip); 1055 if (ret) 1056 goto unmap; 1057 1058 spin_lock_init(&vip->slock); 1059 1060 ret = request_irq(pdev->irq, 1061 (irq_handler_t) vip_irq, 1062 IRQF_SHARED, KBUILD_MODNAME, vip); 1063 if (ret) { 1064 dev_err(&pdev->dev, "request_irq failed\n"); 1065 ret = -ENODEV; 1066 goto release_buf; 1067 } 1068 1069 /* Initialize and register video device */ 1070 vip->video_dev = video_dev_template; 1071 vip->video_dev.v4l2_dev = &vip->v4l2_dev; 1072 vip->video_dev.queue = &vip->vb_vidq; 1073 vip->video_dev.lock = &vip->v4l_lock; 1074 video_set_drvdata(&vip->video_dev, vip); 1075 1076 ret = video_register_device(&vip->video_dev, VFL_TYPE_GRABBER, -1); 1077 if (ret) 1078 goto vrelease; 1079 1080 /* Get ADV7180 subdevice */ 1081 vip->adapter = i2c_get_adapter(vip->config->i2c_id); 1082 if (!vip->adapter) { 1083 ret = -ENODEV; 1084 dev_err(&pdev->dev, "no I2C adapter found\n"); 1085 goto vunreg; 1086 } 1087 1088 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, 1089 "adv7180", vip->config->i2c_addr, 1090 NULL); 1091 if (!vip->decoder) { 1092 ret = -ENODEV; 1093 dev_err(&pdev->dev, "no decoder found\n"); 1094 goto vunreg; 1095 } 1096 1097 i2c_put_adapter(vip->adapter); 1098 v4l2_subdev_call(vip->decoder, core, init, 0); 1099 1100 sta2x11_vip_init_register(vip); 1101 1102 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); 1103 return 0; 1104 1105 vunreg: 1106 video_set_drvdata(&vip->video_dev, NULL); 1107 vrelease: 1108 video_unregister_device(&vip->video_dev); 1109 free_irq(pdev->irq, vip); 1110 release_buf: 1111 pci_disable_msi(pdev); 1112 unmap: 1113 vb2_queue_release(&vip->vb_vidq); 1114 pci_iounmap(pdev, vip->iomem); 1115 release: 1116 pci_release_regions(pdev); 1117 unreg: 1118 v4l2_device_unregister(&vip->v4l2_dev); 1119 free_mem: 1120 kfree(vip); 1121 release_gpios: 1122 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); 1123 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); 1124 disable: 1125 /* 1126 * do not call pci_disable_device on sta2x11 because it break all 1127 * other Bus masters on this EP 1128 */ 1129 return ret; 1130 } 1131 1132 /** 1133 * sta2x11_vip_remove_one - release device 1134 * @pdev: PCI device 1135 * 1136 * Undo everything done in .._init_one 1137 * 1138 * unregister video device 1139 * free interrupt 1140 * unmap ioadresses 1141 * free memory 1142 * free GPIO pins 1143 */ 1144 static void sta2x11_vip_remove_one(struct pci_dev *pdev) 1145 { 1146 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1147 struct sta2x11_vip *vip = 1148 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1149 1150 sta2x11_vip_clear_register(vip); 1151 1152 video_set_drvdata(&vip->video_dev, NULL); 1153 video_unregister_device(&vip->video_dev); 1154 free_irq(pdev->irq, vip); 1155 pci_disable_msi(pdev); 1156 vb2_queue_release(&vip->vb_vidq); 1157 pci_iounmap(pdev, vip->iomem); 1158 pci_release_regions(pdev); 1159 1160 v4l2_device_unregister(&vip->v4l2_dev); 1161 1162 vip_gpio_release(&pdev->dev, vip->config->pwr_pin, 1163 vip->config->pwr_name); 1164 vip_gpio_release(&pdev->dev, vip->config->reset_pin, 1165 vip->config->reset_name); 1166 1167 kfree(vip); 1168 /* 1169 * do not call pci_disable_device on sta2x11 because it break all 1170 * other Bus masters on this EP 1171 */ 1172 } 1173 1174 #ifdef CONFIG_PM 1175 1176 /** 1177 * sta2x11_vip_suspend - set device into power save mode 1178 * @pdev: PCI device 1179 * @state: new state of device 1180 * 1181 * all relevant registers are saved and an attempt to set a new state is made. 1182 * 1183 * return value: 0 always indicate success, 1184 * even if device could not be disabled. (workaround for hardware problem) 1185 */ 1186 static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state) 1187 { 1188 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1189 struct sta2x11_vip *vip = 1190 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1191 unsigned long flags; 1192 int i; 1193 1194 spin_lock_irqsave(&vip->slock, flags); 1195 vip->register_save_area[0] = reg_read(vip, DVP_CTL); 1196 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); 1197 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); 1198 reg_write(vip, DVP_ITM, 0); 1199 for (i = 1; i < SAVE_COUNT; i++) 1200 vip->register_save_area[i] = reg_read(vip, 4 * i); 1201 for (i = 0; i < AUX_COUNT; i++) 1202 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = 1203 reg_read(vip, registers_to_save[i]); 1204 spin_unlock_irqrestore(&vip->slock, flags); 1205 /* save pci state */ 1206 pci_save_state(pdev); 1207 if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) { 1208 /* 1209 * do not call pci_disable_device on sta2x11 because it 1210 * break all other Bus masters on this EP 1211 */ 1212 vip->disabled = 1; 1213 } 1214 1215 pr_info("VIP: suspend\n"); 1216 return 0; 1217 } 1218 1219 /** 1220 * sta2x11_vip_resume - resume device operation 1221 * @pdev : PCI device 1222 * 1223 * re-enable device, set PCI state to powered and restore registers. 1224 * resume normal device operation afterwards. 1225 * 1226 * return value: 0, no error. 1227 * 1228 * other, could not set device to power on state. 1229 */ 1230 static int sta2x11_vip_resume(struct pci_dev *pdev) 1231 { 1232 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1233 struct sta2x11_vip *vip = 1234 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1235 unsigned long flags; 1236 int ret, i; 1237 1238 pr_info("VIP: resume\n"); 1239 /* restore pci state */ 1240 if (vip->disabled) { 1241 ret = pci_enable_device(pdev); 1242 if (ret) { 1243 pr_warn("VIP: Can't enable device.\n"); 1244 return ret; 1245 } 1246 vip->disabled = 0; 1247 } 1248 ret = pci_set_power_state(pdev, PCI_D0); 1249 if (ret) { 1250 /* 1251 * do not call pci_disable_device on sta2x11 because it 1252 * break all other Bus masters on this EP 1253 */ 1254 pr_warn("VIP: Can't enable device.\n"); 1255 vip->disabled = 1; 1256 return ret; 1257 } 1258 1259 pci_restore_state(pdev); 1260 1261 spin_lock_irqsave(&vip->slock, flags); 1262 for (i = 1; i < SAVE_COUNT; i++) 1263 reg_write(vip, 4 * i, vip->register_save_area[i]); 1264 for (i = 0; i < AUX_COUNT; i++) 1265 reg_write(vip, registers_to_save[i], 1266 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); 1267 reg_write(vip, DVP_CTL, vip->register_save_area[0]); 1268 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); 1269 spin_unlock_irqrestore(&vip->slock, flags); 1270 return 0; 1271 } 1272 1273 #endif 1274 1275 static const struct pci_device_id sta2x11_vip_pci_tbl[] = { 1276 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, 1277 {0,} 1278 }; 1279 1280 static struct pci_driver sta2x11_vip_driver = { 1281 .name = KBUILD_MODNAME, 1282 .probe = sta2x11_vip_init_one, 1283 .remove = sta2x11_vip_remove_one, 1284 .id_table = sta2x11_vip_pci_tbl, 1285 #ifdef CONFIG_PM 1286 .suspend = sta2x11_vip_suspend, 1287 .resume = sta2x11_vip_resume, 1288 #endif 1289 }; 1290 1291 static int __init sta2x11_vip_init_module(void) 1292 { 1293 return pci_register_driver(&sta2x11_vip_driver); 1294 } 1295 1296 static void __exit sta2x11_vip_exit_module(void) 1297 { 1298 pci_unregister_driver(&sta2x11_vip_driver); 1299 } 1300 1301 #ifdef MODULE 1302 module_init(sta2x11_vip_init_module); 1303 module_exit(sta2x11_vip_exit_module); 1304 #else 1305 late_initcall_sync(sta2x11_vip_init_module); 1306 #endif 1307 1308 MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); 1309 MODULE_AUTHOR("Wind River"); 1310 MODULE_LICENSE("GPL v2"); 1311 MODULE_SUPPORTED_DEVICE("sta2x11 video input"); 1312 MODULE_VERSION(DRV_VERSION); 1313 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); 1314