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 return 0; 411 } 412 413 /** 414 * vidioc_s_std - set video standard 415 * @file: descriptor of device 416 * @std: contains standard to be set 417 * @priv: unused 418 * 419 * the video standard is set 420 * 421 * return value: 0, no error. 422 * 423 * -EIO, no input signal detected 424 * 425 * other, returned from video DAC. 426 */ 427 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) 428 { 429 struct sta2x11_vip *vip = video_drvdata(file); 430 431 /* 432 * This is here for backwards compatibility only. 433 * The use of V4L2_STD_ALL to trigger a querystd is non-standard. 434 */ 435 if (std == V4L2_STD_ALL) { 436 v4l2_subdev_call(vip->decoder, video, querystd, &std); 437 if (std == V4L2_STD_UNKNOWN) 438 return -EIO; 439 } 440 441 if (vip->std != std) { 442 vip->std = std; 443 if (V4L2_STD_525_60 & std) 444 vip->format = formats_60[0]; 445 else 446 vip->format = formats_50[0]; 447 } 448 449 return v4l2_subdev_call(vip->decoder, video, s_std, std); 450 } 451 452 /** 453 * vidioc_g_std - get video standard 454 * @file: descriptor of device 455 * @priv: unused 456 * @std: contains return values 457 * 458 * the current video standard is returned 459 * 460 * return value: 0, no error. 461 */ 462 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) 463 { 464 struct sta2x11_vip *vip = video_drvdata(file); 465 466 *std = vip->std; 467 return 0; 468 } 469 470 /** 471 * vidioc_querystd - get possible video standards 472 * @file: descriptor of device 473 * @priv: unused 474 * @std: contains return values 475 * 476 * all possible video standards are returned 477 * 478 * return value: delivered by video DAC routine. 479 */ 480 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) 481 { 482 struct sta2x11_vip *vip = video_drvdata(file); 483 484 return v4l2_subdev_call(vip->decoder, video, querystd, std); 485 } 486 487 static int vidioc_enum_input(struct file *file, void *priv, 488 struct v4l2_input *inp) 489 { 490 if (inp->index > 1) 491 return -EINVAL; 492 493 inp->type = V4L2_INPUT_TYPE_CAMERA; 494 inp->std = V4L2_STD_ALL; 495 sprintf(inp->name, "Camera %u", inp->index); 496 497 return 0; 498 } 499 500 /** 501 * vidioc_s_input - set input line 502 * @file: descriptor of device 503 * @priv: unused 504 * @i: new input line number 505 * 506 * the current active input line is set 507 * 508 * return value: 0, no error. 509 * 510 * -EINVAL, line number out of range 511 */ 512 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 513 { 514 struct sta2x11_vip *vip = video_drvdata(file); 515 int ret; 516 517 if (i > 1) 518 return -EINVAL; 519 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); 520 521 if (!ret) 522 vip->input = i; 523 524 return 0; 525 } 526 527 /** 528 * vidioc_g_input - return input line 529 * @file: descriptor of device 530 * @priv: unused 531 * @i: returned input line number 532 * 533 * the current active input line is returned 534 * 535 * return value: always 0. 536 */ 537 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 538 { 539 struct sta2x11_vip *vip = video_drvdata(file); 540 541 *i = vip->input; 542 return 0; 543 } 544 545 /** 546 * vidioc_enum_fmt_vid_cap - return video capture format 547 * @file: descriptor of device 548 * @priv: unused 549 * @f: returned format information 550 * 551 * returns name and format of video capture 552 * Only UYVY is supported by hardware. 553 * 554 * return value: always 0. 555 */ 556 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 557 struct v4l2_fmtdesc *f) 558 { 559 560 if (f->index != 0) 561 return -EINVAL; 562 563 strscpy(f->description, "4:2:2, packed, UYVY", sizeof(f->description)); 564 f->pixelformat = V4L2_PIX_FMT_UYVY; 565 f->flags = 0; 566 return 0; 567 } 568 569 /** 570 * vidioc_try_fmt_vid_cap - set video capture format 571 * @file: descriptor of device 572 * @priv: unused 573 * @f: new format 574 * 575 * new video format is set which includes width and 576 * field type. width is fixed to 720, no scaling. 577 * Only UYVY is supported by this hardware. 578 * the minimum height is 200, the maximum is 576 (PAL) 579 * 580 * return value: 0, no error 581 * 582 * -EINVAL, pixel or field format not supported 583 * 584 */ 585 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 586 struct v4l2_format *f) 587 { 588 struct sta2x11_vip *vip = video_drvdata(file); 589 int interlace_lim; 590 591 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { 592 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n"); 593 return -EINVAL; 594 } 595 596 if (V4L2_STD_525_60 & vip->std) 597 interlace_lim = 240; 598 else 599 interlace_lim = 288; 600 601 switch (f->fmt.pix.field) { 602 default: 603 case V4L2_FIELD_ANY: 604 if (interlace_lim < f->fmt.pix.height) 605 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 606 else 607 f->fmt.pix.field = V4L2_FIELD_BOTTOM; 608 break; 609 case V4L2_FIELD_TOP: 610 case V4L2_FIELD_BOTTOM: 611 if (interlace_lim < f->fmt.pix.height) 612 f->fmt.pix.height = interlace_lim; 613 break; 614 case V4L2_FIELD_INTERLACED: 615 break; 616 } 617 618 /* It is the only supported format */ 619 f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; 620 f->fmt.pix.height &= ~1; 621 if (2 * interlace_lim < f->fmt.pix.height) 622 f->fmt.pix.height = 2 * interlace_lim; 623 if (200 > f->fmt.pix.height) 624 f->fmt.pix.height = 200; 625 f->fmt.pix.width = 720; 626 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 627 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; 628 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 629 return 0; 630 } 631 632 /** 633 * vidioc_s_fmt_vid_cap - set current video format parameters 634 * @file: descriptor of device 635 * @priv: unused 636 * @f: returned format information 637 * 638 * set new capture format 639 * return value: 0, no error 640 * 641 * other, delivered by video DAC routine. 642 */ 643 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 644 struct v4l2_format *f) 645 { 646 struct sta2x11_vip *vip = video_drvdata(file); 647 unsigned int t_stop, b_stop, pitch; 648 int ret; 649 650 ret = vidioc_try_fmt_vid_cap(file, priv, f); 651 if (ret) 652 return ret; 653 654 if (vb2_is_busy(&vip->vb_vidq)) { 655 /* Can't change format during acquisition */ 656 v4l2_err(&vip->v4l2_dev, "device busy\n"); 657 return -EBUSY; 658 } 659 vip->format = f->fmt.pix; 660 switch (vip->format.field) { 661 case V4L2_FIELD_INTERLACED: 662 t_stop = ((vip->format.height / 2 - 1) << 16) | 663 (2 * vip->format.width - 1); 664 b_stop = t_stop; 665 pitch = 4 * vip->format.width; 666 break; 667 case V4L2_FIELD_TOP: 668 t_stop = ((vip->format.height - 1) << 16) | 669 (2 * vip->format.width - 1); 670 b_stop = (0 << 16) | (2 * vip->format.width - 1); 671 pitch = 2 * vip->format.width; 672 break; 673 case V4L2_FIELD_BOTTOM: 674 t_stop = (0 << 16) | (2 * vip->format.width - 1); 675 b_stop = (vip->format.height << 16) | 676 (2 * vip->format.width - 1); 677 pitch = 2 * vip->format.width; 678 break; 679 default: 680 v4l2_err(&vip->v4l2_dev, "unknown field format\n"); 681 return -EINVAL; 682 } 683 684 spin_lock_irq(&vip->slock); 685 /* Y-X Top Field Offset */ 686 reg_write(vip, DVP_TFO, 0); 687 /* Y-X Bottom Field Offset */ 688 reg_write(vip, DVP_BFO, 0); 689 /* Y-X Top Field Stop*/ 690 reg_write(vip, DVP_TFS, t_stop); 691 /* Y-X Bottom Field Stop */ 692 reg_write(vip, DVP_BFS, b_stop); 693 /* Video Memory Pitch */ 694 reg_write(vip, DVP_VMP, pitch); 695 spin_unlock_irq(&vip->slock); 696 697 return 0; 698 } 699 700 /** 701 * vidioc_g_fmt_vid_cap - get current video format parameters 702 * @file: descriptor of device 703 * @priv: unused 704 * @f: contains format information 705 * 706 * returns current video format parameters 707 * 708 * return value: 0, always successful 709 */ 710 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 711 struct v4l2_format *f) 712 { 713 struct sta2x11_vip *vip = video_drvdata(file); 714 715 f->fmt.pix = vip->format; 716 717 return 0; 718 } 719 720 static const struct v4l2_ioctl_ops vip_ioctl_ops = { 721 .vidioc_querycap = vidioc_querycap, 722 /* FMT handling */ 723 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 724 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 725 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 726 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 727 /* Buffer handlers */ 728 .vidioc_create_bufs = vb2_ioctl_create_bufs, 729 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 730 .vidioc_reqbufs = vb2_ioctl_reqbufs, 731 .vidioc_querybuf = vb2_ioctl_querybuf, 732 .vidioc_qbuf = vb2_ioctl_qbuf, 733 .vidioc_dqbuf = vb2_ioctl_dqbuf, 734 /* Stream on/off */ 735 .vidioc_streamon = vb2_ioctl_streamon, 736 .vidioc_streamoff = vb2_ioctl_streamoff, 737 /* Standard handling */ 738 .vidioc_g_std = vidioc_g_std, 739 .vidioc_s_std = vidioc_s_std, 740 .vidioc_querystd = vidioc_querystd, 741 /* Input handling */ 742 .vidioc_enum_input = vidioc_enum_input, 743 .vidioc_g_input = vidioc_g_input, 744 .vidioc_s_input = vidioc_s_input, 745 /* Log status ioctl */ 746 .vidioc_log_status = v4l2_ctrl_log_status, 747 /* Event handling */ 748 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 749 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 750 }; 751 752 static const struct video_device video_dev_template = { 753 .name = KBUILD_MODNAME, 754 .release = video_device_release_empty, 755 .fops = &vip_fops, 756 .ioctl_ops = &vip_ioctl_ops, 757 .tvnorms = V4L2_STD_ALL, 758 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 759 V4L2_CAP_STREAMING, 760 }; 761 762 /** 763 * vip_irq - interrupt routine 764 * @irq: Number of interrupt ( not used, correct number is assumed ) 765 * @vip: local data structure containing all information 766 * 767 * check for both frame interrupts set ( top and bottom ). 768 * check FIFO overflow, but limit number of log messages after open. 769 * signal a complete buffer if done 770 * 771 * return value: IRQ_NONE, interrupt was not generated by VIP 772 * 773 * IRQ_HANDLED, interrupt done. 774 */ 775 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip) 776 { 777 unsigned int status; 778 779 status = reg_read(vip, DVP_ITS); 780 781 if (!status) /* No interrupt to handle */ 782 return IRQ_NONE; 783 784 if (status & DVP_IT_FIFO) 785 if (vip->overflow++ > 5) 786 pr_info("VIP: fifo overflow\n"); 787 788 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { 789 /* this is bad, we are too slow, hope the condition is gone 790 * on the next frame */ 791 return IRQ_HANDLED; 792 } 793 794 if (status & DVP_IT_VST) 795 if ((++vip->tcount) < 2) 796 return IRQ_HANDLED; 797 if (status & DVP_IT_VSB) { 798 vip->bcount++; 799 return IRQ_HANDLED; 800 } 801 802 if (vip->active) { /* Acquisition is over on this buffer */ 803 /* Disable acquisition */ 804 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 805 /* Remove the active buffer from the list */ 806 vip->active->vb.vb2_buf.timestamp = ktime_get_ns(); 807 vip->active->vb.sequence = vip->sequence++; 808 vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE); 809 } 810 811 return IRQ_HANDLED; 812 } 813 814 static void sta2x11_vip_init_register(struct sta2x11_vip *vip) 815 { 816 /* Register initialization */ 817 spin_lock_irq(&vip->slock); 818 /* Clean interrupt */ 819 reg_read(vip, DVP_ITS); 820 /* Enable Half Line per vertical */ 821 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); 822 /* Reset VIP control */ 823 reg_write(vip, DVP_CTL, DVP_CTL_RST); 824 /* Clear VIP control */ 825 reg_write(vip, DVP_CTL, 0); 826 spin_unlock_irq(&vip->slock); 827 } 828 static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) 829 { 830 spin_lock_irq(&vip->slock); 831 /* Disable interrupt */ 832 reg_write(vip, DVP_ITM, 0); 833 /* Reset VIP Control */ 834 reg_write(vip, DVP_CTL, DVP_CTL_RST); 835 /* Clear VIP Control */ 836 reg_write(vip, DVP_CTL, 0); 837 /* Clean VIP Interrupt */ 838 reg_read(vip, DVP_ITS); 839 spin_unlock_irq(&vip->slock); 840 } 841 static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) 842 { 843 int err; 844 845 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); 846 if (err) { 847 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); 848 return err; 849 } 850 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); 851 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 852 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; 853 vip->vb_vidq.drv_priv = vip; 854 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); 855 vip->vb_vidq.ops = &vip_video_qops; 856 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; 857 vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 858 vip->vb_vidq.dev = &vip->pdev->dev; 859 vip->vb_vidq.lock = &vip->v4l_lock; 860 err = vb2_queue_init(&vip->vb_vidq); 861 if (err) 862 return err; 863 INIT_LIST_HEAD(&vip->buffer_list); 864 spin_lock_init(&vip->lock); 865 return 0; 866 } 867 868 static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) 869 { 870 /* 871 * Inititialize an empty control so VIP can inerithing controls 872 * from ADV7180 873 */ 874 v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); 875 876 vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; 877 if (vip->ctrl_hdl.error) { 878 int err = vip->ctrl_hdl.error; 879 880 v4l2_ctrl_handler_free(&vip->ctrl_hdl); 881 return err; 882 } 883 884 return 0; 885 } 886 887 /** 888 * vip_gpio_reserve - reserve gpio pin 889 * @dev: device 890 * @pin: GPIO pin number 891 * @dir: direction, input or output 892 * @name: GPIO pin name 893 * 894 */ 895 static int vip_gpio_reserve(struct device *dev, int pin, int dir, 896 const char *name) 897 { 898 int ret = -ENODEV; 899 900 if (!gpio_is_valid(pin)) 901 return ret; 902 903 ret = gpio_request(pin, name); 904 if (ret) { 905 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); 906 return ret; 907 } 908 909 ret = gpio_direction_output(pin, dir); 910 if (ret) { 911 dev_err(dev, "Failed to set direction for pin %d (%s)\n", 912 pin, name); 913 gpio_free(pin); 914 return ret; 915 } 916 917 ret = gpio_export(pin, false); 918 if (ret) { 919 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); 920 gpio_free(pin); 921 return ret; 922 } 923 924 return 0; 925 } 926 927 /** 928 * vip_gpio_release - release gpio pin 929 * @dev: device 930 * @pin: GPIO pin number 931 * @name: GPIO pin name 932 * 933 */ 934 static void vip_gpio_release(struct device *dev, int pin, const char *name) 935 { 936 if (gpio_is_valid(pin)) { 937 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); 938 gpio_unexport(pin); 939 gpio_free(pin); 940 } 941 } 942 943 /** 944 * sta2x11_vip_init_one - init one instance of video device 945 * @pdev: PCI device 946 * @ent: (not used) 947 * 948 * allocate reset pins for DAC. 949 * Reset video DAC, this is done via reset line. 950 * allocate memory for managing device 951 * request interrupt 952 * map IO region 953 * register device 954 * find and initialize video DAC 955 * 956 * return value: 0, no error 957 * 958 * -ENOMEM, no memory 959 * 960 * -ENODEV, device could not be detected or registered 961 */ 962 static int sta2x11_vip_init_one(struct pci_dev *pdev, 963 const struct pci_device_id *ent) 964 { 965 int ret; 966 struct sta2x11_vip *vip; 967 struct vip_config *config; 968 969 /* Check if hardware support 26-bit DMA */ 970 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { 971 dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); 972 return -EINVAL; 973 } 974 /* Enable PCI */ 975 ret = pci_enable_device(pdev); 976 if (ret) 977 return ret; 978 979 /* Get VIP platform data */ 980 config = dev_get_platdata(&pdev->dev); 981 if (!config) { 982 dev_info(&pdev->dev, "VIP slot disabled\n"); 983 ret = -EINVAL; 984 goto disable; 985 } 986 987 /* Power configuration */ 988 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, 989 config->pwr_name); 990 if (ret) 991 goto disable; 992 993 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, 994 config->reset_name); 995 if (ret) { 996 vip_gpio_release(&pdev->dev, config->pwr_pin, 997 config->pwr_name); 998 goto disable; 999 } 1000 1001 if (gpio_is_valid(config->pwr_pin)) { 1002 /* Datasheet says 5ms between PWR and RST */ 1003 usleep_range(5000, 25000); 1004 gpio_direction_output(config->pwr_pin, 1); 1005 } 1006 1007 if (gpio_is_valid(config->reset_pin)) { 1008 /* Datasheet says 5ms between PWR and RST */ 1009 usleep_range(5000, 25000); 1010 gpio_direction_output(config->reset_pin, 1); 1011 } 1012 usleep_range(5000, 25000); 1013 1014 /* Allocate a new VIP instance */ 1015 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); 1016 if (!vip) { 1017 ret = -ENOMEM; 1018 goto release_gpios; 1019 } 1020 vip->pdev = pdev; 1021 vip->std = V4L2_STD_PAL; 1022 vip->format = formats_50[0]; 1023 vip->config = config; 1024 mutex_init(&vip->v4l_lock); 1025 1026 ret = sta2x11_vip_init_controls(vip); 1027 if (ret) 1028 goto free_mem; 1029 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); 1030 if (ret) 1031 goto free_mem; 1032 1033 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", 1034 (unsigned long)pci_resource_start(pdev, 0), 1035 (unsigned long)pci_resource_len(pdev, 0), pdev->irq); 1036 1037 pci_set_master(pdev); 1038 1039 ret = pci_request_regions(pdev, KBUILD_MODNAME); 1040 if (ret) 1041 goto unreg; 1042 1043 vip->iomem = pci_iomap(pdev, 0, 0x100); 1044 if (!vip->iomem) { 1045 ret = -ENOMEM; 1046 goto release; 1047 } 1048 1049 pci_enable_msi(pdev); 1050 1051 /* Initialize buffer */ 1052 ret = sta2x11_vip_init_buffer(vip); 1053 if (ret) 1054 goto unmap; 1055 1056 spin_lock_init(&vip->slock); 1057 1058 ret = request_irq(pdev->irq, 1059 (irq_handler_t) vip_irq, 1060 IRQF_SHARED, KBUILD_MODNAME, vip); 1061 if (ret) { 1062 dev_err(&pdev->dev, "request_irq failed\n"); 1063 ret = -ENODEV; 1064 goto release_buf; 1065 } 1066 1067 /* Initialize and register video device */ 1068 vip->video_dev = video_dev_template; 1069 vip->video_dev.v4l2_dev = &vip->v4l2_dev; 1070 vip->video_dev.queue = &vip->vb_vidq; 1071 vip->video_dev.lock = &vip->v4l_lock; 1072 video_set_drvdata(&vip->video_dev, vip); 1073 1074 ret = video_register_device(&vip->video_dev, VFL_TYPE_GRABBER, -1); 1075 if (ret) 1076 goto vrelease; 1077 1078 /* Get ADV7180 subdevice */ 1079 vip->adapter = i2c_get_adapter(vip->config->i2c_id); 1080 if (!vip->adapter) { 1081 ret = -ENODEV; 1082 dev_err(&pdev->dev, "no I2C adapter found\n"); 1083 goto vunreg; 1084 } 1085 1086 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, 1087 "adv7180", vip->config->i2c_addr, 1088 NULL); 1089 if (!vip->decoder) { 1090 ret = -ENODEV; 1091 dev_err(&pdev->dev, "no decoder found\n"); 1092 goto vunreg; 1093 } 1094 1095 i2c_put_adapter(vip->adapter); 1096 v4l2_subdev_call(vip->decoder, core, init, 0); 1097 1098 sta2x11_vip_init_register(vip); 1099 1100 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); 1101 return 0; 1102 1103 vunreg: 1104 video_set_drvdata(&vip->video_dev, NULL); 1105 vrelease: 1106 video_unregister_device(&vip->video_dev); 1107 free_irq(pdev->irq, vip); 1108 release_buf: 1109 pci_disable_msi(pdev); 1110 unmap: 1111 vb2_queue_release(&vip->vb_vidq); 1112 pci_iounmap(pdev, vip->iomem); 1113 release: 1114 pci_release_regions(pdev); 1115 unreg: 1116 v4l2_device_unregister(&vip->v4l2_dev); 1117 free_mem: 1118 kfree(vip); 1119 release_gpios: 1120 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); 1121 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); 1122 disable: 1123 /* 1124 * do not call pci_disable_device on sta2x11 because it break all 1125 * other Bus masters on this EP 1126 */ 1127 return ret; 1128 } 1129 1130 /** 1131 * sta2x11_vip_remove_one - release device 1132 * @pdev: PCI device 1133 * 1134 * Undo everything done in .._init_one 1135 * 1136 * unregister video device 1137 * free interrupt 1138 * unmap ioadresses 1139 * free memory 1140 * free GPIO pins 1141 */ 1142 static void sta2x11_vip_remove_one(struct pci_dev *pdev) 1143 { 1144 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1145 struct sta2x11_vip *vip = 1146 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1147 1148 sta2x11_vip_clear_register(vip); 1149 1150 video_set_drvdata(&vip->video_dev, NULL); 1151 video_unregister_device(&vip->video_dev); 1152 free_irq(pdev->irq, vip); 1153 pci_disable_msi(pdev); 1154 vb2_queue_release(&vip->vb_vidq); 1155 pci_iounmap(pdev, vip->iomem); 1156 pci_release_regions(pdev); 1157 1158 v4l2_device_unregister(&vip->v4l2_dev); 1159 1160 vip_gpio_release(&pdev->dev, vip->config->pwr_pin, 1161 vip->config->pwr_name); 1162 vip_gpio_release(&pdev->dev, vip->config->reset_pin, 1163 vip->config->reset_name); 1164 1165 kfree(vip); 1166 /* 1167 * do not call pci_disable_device on sta2x11 because it break all 1168 * other Bus masters on this EP 1169 */ 1170 } 1171 1172 #ifdef CONFIG_PM 1173 1174 /** 1175 * sta2x11_vip_suspend - set device into power save mode 1176 * @pdev: PCI device 1177 * @state: new state of device 1178 * 1179 * all relevant registers are saved and an attempt to set a new state is made. 1180 * 1181 * return value: 0 always indicate success, 1182 * even if device could not be disabled. (workaround for hardware problem) 1183 */ 1184 static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state) 1185 { 1186 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1187 struct sta2x11_vip *vip = 1188 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1189 unsigned long flags; 1190 int i; 1191 1192 spin_lock_irqsave(&vip->slock, flags); 1193 vip->register_save_area[0] = reg_read(vip, DVP_CTL); 1194 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); 1195 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); 1196 reg_write(vip, DVP_ITM, 0); 1197 for (i = 1; i < SAVE_COUNT; i++) 1198 vip->register_save_area[i] = reg_read(vip, 4 * i); 1199 for (i = 0; i < AUX_COUNT; i++) 1200 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = 1201 reg_read(vip, registers_to_save[i]); 1202 spin_unlock_irqrestore(&vip->slock, flags); 1203 /* save pci state */ 1204 pci_save_state(pdev); 1205 if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) { 1206 /* 1207 * do not call pci_disable_device on sta2x11 because it 1208 * break all other Bus masters on this EP 1209 */ 1210 vip->disabled = 1; 1211 } 1212 1213 pr_info("VIP: suspend\n"); 1214 return 0; 1215 } 1216 1217 /** 1218 * sta2x11_vip_resume - resume device operation 1219 * @pdev : PCI device 1220 * 1221 * re-enable device, set PCI state to powered and restore registers. 1222 * resume normal device operation afterwards. 1223 * 1224 * return value: 0, no error. 1225 * 1226 * other, could not set device to power on state. 1227 */ 1228 static int sta2x11_vip_resume(struct pci_dev *pdev) 1229 { 1230 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1231 struct sta2x11_vip *vip = 1232 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1233 unsigned long flags; 1234 int ret, i; 1235 1236 pr_info("VIP: resume\n"); 1237 /* restore pci state */ 1238 if (vip->disabled) { 1239 ret = pci_enable_device(pdev); 1240 if (ret) { 1241 pr_warn("VIP: Can't enable device.\n"); 1242 return ret; 1243 } 1244 vip->disabled = 0; 1245 } 1246 ret = pci_set_power_state(pdev, PCI_D0); 1247 if (ret) { 1248 /* 1249 * do not call pci_disable_device on sta2x11 because it 1250 * break all other Bus masters on this EP 1251 */ 1252 pr_warn("VIP: Can't enable device.\n"); 1253 vip->disabled = 1; 1254 return ret; 1255 } 1256 1257 pci_restore_state(pdev); 1258 1259 spin_lock_irqsave(&vip->slock, flags); 1260 for (i = 1; i < SAVE_COUNT; i++) 1261 reg_write(vip, 4 * i, vip->register_save_area[i]); 1262 for (i = 0; i < AUX_COUNT; i++) 1263 reg_write(vip, registers_to_save[i], 1264 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); 1265 reg_write(vip, DVP_CTL, vip->register_save_area[0]); 1266 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); 1267 spin_unlock_irqrestore(&vip->slock, flags); 1268 return 0; 1269 } 1270 1271 #endif 1272 1273 static const struct pci_device_id sta2x11_vip_pci_tbl[] = { 1274 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, 1275 {0,} 1276 }; 1277 1278 static struct pci_driver sta2x11_vip_driver = { 1279 .name = KBUILD_MODNAME, 1280 .probe = sta2x11_vip_init_one, 1281 .remove = sta2x11_vip_remove_one, 1282 .id_table = sta2x11_vip_pci_tbl, 1283 #ifdef CONFIG_PM 1284 .suspend = sta2x11_vip_suspend, 1285 .resume = sta2x11_vip_resume, 1286 #endif 1287 }; 1288 1289 static int __init sta2x11_vip_init_module(void) 1290 { 1291 return pci_register_driver(&sta2x11_vip_driver); 1292 } 1293 1294 static void __exit sta2x11_vip_exit_module(void) 1295 { 1296 pci_unregister_driver(&sta2x11_vip_driver); 1297 } 1298 1299 #ifdef MODULE 1300 module_init(sta2x11_vip_init_module); 1301 module_exit(sta2x11_vip_exit_module); 1302 #else 1303 late_initcall_sync(sta2x11_vip_init_module); 1304 #endif 1305 1306 MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); 1307 MODULE_AUTHOR("Wind River"); 1308 MODULE_LICENSE("GPL v2"); 1309 MODULE_SUPPORTED_DEVICE("sta2x11 video input"); 1310 MODULE_VERSION(DRV_VERSION); 1311 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); 1312