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 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); 405 strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card)); 406 return 0; 407 } 408 409 /** 410 * vidioc_s_std - set video standard 411 * @file: descriptor of device 412 * @std: contains standard to be set 413 * @priv: unused 414 * 415 * the video standard is set 416 * 417 * return value: 0, no error. 418 * 419 * -EIO, no input signal detected 420 * 421 * other, returned from video DAC. 422 */ 423 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) 424 { 425 struct sta2x11_vip *vip = video_drvdata(file); 426 427 /* 428 * This is here for backwards compatibility only. 429 * The use of V4L2_STD_ALL to trigger a querystd is non-standard. 430 */ 431 if (std == V4L2_STD_ALL) { 432 v4l2_subdev_call(vip->decoder, video, querystd, &std); 433 if (std == V4L2_STD_UNKNOWN) 434 return -EIO; 435 } 436 437 if (vip->std != std) { 438 vip->std = std; 439 if (V4L2_STD_525_60 & std) 440 vip->format = formats_60[0]; 441 else 442 vip->format = formats_50[0]; 443 } 444 445 return v4l2_subdev_call(vip->decoder, video, s_std, std); 446 } 447 448 /** 449 * vidioc_g_std - get video standard 450 * @file: descriptor of device 451 * @priv: unused 452 * @std: contains return values 453 * 454 * the current video standard is returned 455 * 456 * return value: 0, no error. 457 */ 458 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) 459 { 460 struct sta2x11_vip *vip = video_drvdata(file); 461 462 *std = vip->std; 463 return 0; 464 } 465 466 /** 467 * vidioc_querystd - get possible video standards 468 * @file: descriptor of device 469 * @priv: unused 470 * @std: contains return values 471 * 472 * all possible video standards are returned 473 * 474 * return value: delivered by video DAC routine. 475 */ 476 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) 477 { 478 struct sta2x11_vip *vip = video_drvdata(file); 479 480 return v4l2_subdev_call(vip->decoder, video, querystd, std); 481 } 482 483 static int vidioc_enum_input(struct file *file, void *priv, 484 struct v4l2_input *inp) 485 { 486 if (inp->index > 1) 487 return -EINVAL; 488 489 inp->type = V4L2_INPUT_TYPE_CAMERA; 490 inp->std = V4L2_STD_ALL; 491 sprintf(inp->name, "Camera %u", inp->index); 492 493 return 0; 494 } 495 496 /** 497 * vidioc_s_input - set input line 498 * @file: descriptor of device 499 * @priv: unused 500 * @i: new input line number 501 * 502 * the current active input line is set 503 * 504 * return value: 0, no error. 505 * 506 * -EINVAL, line number out of range 507 */ 508 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 509 { 510 struct sta2x11_vip *vip = video_drvdata(file); 511 int ret; 512 513 if (i > 1) 514 return -EINVAL; 515 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); 516 517 if (!ret) 518 vip->input = i; 519 520 return 0; 521 } 522 523 /** 524 * vidioc_g_input - return input line 525 * @file: descriptor of device 526 * @priv: unused 527 * @i: returned input line number 528 * 529 * the current active input line is returned 530 * 531 * return value: always 0. 532 */ 533 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 534 { 535 struct sta2x11_vip *vip = video_drvdata(file); 536 537 *i = vip->input; 538 return 0; 539 } 540 541 /** 542 * vidioc_enum_fmt_vid_cap - return video capture format 543 * @file: descriptor of device 544 * @priv: unused 545 * @f: returned format information 546 * 547 * returns name and format of video capture 548 * Only UYVY is supported by hardware. 549 * 550 * return value: always 0. 551 */ 552 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 553 struct v4l2_fmtdesc *f) 554 { 555 556 if (f->index != 0) 557 return -EINVAL; 558 559 f->pixelformat = V4L2_PIX_FMT_UYVY; 560 return 0; 561 } 562 563 /** 564 * vidioc_try_fmt_vid_cap - set video capture format 565 * @file: descriptor of device 566 * @priv: unused 567 * @f: new format 568 * 569 * new video format is set which includes width and 570 * field type. width is fixed to 720, no scaling. 571 * Only UYVY is supported by this hardware. 572 * the minimum height is 200, the maximum is 576 (PAL) 573 * 574 * return value: 0, no error 575 * 576 * -EINVAL, pixel or field format not supported 577 * 578 */ 579 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 580 struct v4l2_format *f) 581 { 582 struct sta2x11_vip *vip = video_drvdata(file); 583 int interlace_lim; 584 585 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { 586 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n"); 587 return -EINVAL; 588 } 589 590 if (V4L2_STD_525_60 & vip->std) 591 interlace_lim = 240; 592 else 593 interlace_lim = 288; 594 595 switch (f->fmt.pix.field) { 596 default: 597 case V4L2_FIELD_ANY: 598 if (interlace_lim < f->fmt.pix.height) 599 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 600 else 601 f->fmt.pix.field = V4L2_FIELD_BOTTOM; 602 break; 603 case V4L2_FIELD_TOP: 604 case V4L2_FIELD_BOTTOM: 605 if (interlace_lim < f->fmt.pix.height) 606 f->fmt.pix.height = interlace_lim; 607 break; 608 case V4L2_FIELD_INTERLACED: 609 break; 610 } 611 612 /* It is the only supported format */ 613 f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; 614 f->fmt.pix.height &= ~1; 615 if (2 * interlace_lim < f->fmt.pix.height) 616 f->fmt.pix.height = 2 * interlace_lim; 617 if (200 > f->fmt.pix.height) 618 f->fmt.pix.height = 200; 619 f->fmt.pix.width = 720; 620 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 621 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; 622 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 623 return 0; 624 } 625 626 /** 627 * vidioc_s_fmt_vid_cap - set current video format parameters 628 * @file: descriptor of device 629 * @priv: unused 630 * @f: returned format information 631 * 632 * set new capture format 633 * return value: 0, no error 634 * 635 * other, delivered by video DAC routine. 636 */ 637 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 638 struct v4l2_format *f) 639 { 640 struct sta2x11_vip *vip = video_drvdata(file); 641 unsigned int t_stop, b_stop, pitch; 642 int ret; 643 644 ret = vidioc_try_fmt_vid_cap(file, priv, f); 645 if (ret) 646 return ret; 647 648 if (vb2_is_busy(&vip->vb_vidq)) { 649 /* Can't change format during acquisition */ 650 v4l2_err(&vip->v4l2_dev, "device busy\n"); 651 return -EBUSY; 652 } 653 vip->format = f->fmt.pix; 654 switch (vip->format.field) { 655 case V4L2_FIELD_INTERLACED: 656 t_stop = ((vip->format.height / 2 - 1) << 16) | 657 (2 * vip->format.width - 1); 658 b_stop = t_stop; 659 pitch = 4 * vip->format.width; 660 break; 661 case V4L2_FIELD_TOP: 662 t_stop = ((vip->format.height - 1) << 16) | 663 (2 * vip->format.width - 1); 664 b_stop = (0 << 16) | (2 * vip->format.width - 1); 665 pitch = 2 * vip->format.width; 666 break; 667 case V4L2_FIELD_BOTTOM: 668 t_stop = (0 << 16) | (2 * vip->format.width - 1); 669 b_stop = (vip->format.height << 16) | 670 (2 * vip->format.width - 1); 671 pitch = 2 * vip->format.width; 672 break; 673 default: 674 v4l2_err(&vip->v4l2_dev, "unknown field format\n"); 675 return -EINVAL; 676 } 677 678 spin_lock_irq(&vip->slock); 679 /* Y-X Top Field Offset */ 680 reg_write(vip, DVP_TFO, 0); 681 /* Y-X Bottom Field Offset */ 682 reg_write(vip, DVP_BFO, 0); 683 /* Y-X Top Field Stop*/ 684 reg_write(vip, DVP_TFS, t_stop); 685 /* Y-X Bottom Field Stop */ 686 reg_write(vip, DVP_BFS, b_stop); 687 /* Video Memory Pitch */ 688 reg_write(vip, DVP_VMP, pitch); 689 spin_unlock_irq(&vip->slock); 690 691 return 0; 692 } 693 694 /** 695 * vidioc_g_fmt_vid_cap - get current video format parameters 696 * @file: descriptor of device 697 * @priv: unused 698 * @f: contains format information 699 * 700 * returns current video format parameters 701 * 702 * return value: 0, always successful 703 */ 704 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 705 struct v4l2_format *f) 706 { 707 struct sta2x11_vip *vip = video_drvdata(file); 708 709 f->fmt.pix = vip->format; 710 711 return 0; 712 } 713 714 static const struct v4l2_ioctl_ops vip_ioctl_ops = { 715 .vidioc_querycap = vidioc_querycap, 716 /* FMT handling */ 717 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 718 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 719 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 720 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 721 /* Buffer handlers */ 722 .vidioc_create_bufs = vb2_ioctl_create_bufs, 723 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 724 .vidioc_reqbufs = vb2_ioctl_reqbufs, 725 .vidioc_querybuf = vb2_ioctl_querybuf, 726 .vidioc_qbuf = vb2_ioctl_qbuf, 727 .vidioc_dqbuf = vb2_ioctl_dqbuf, 728 /* Stream on/off */ 729 .vidioc_streamon = vb2_ioctl_streamon, 730 .vidioc_streamoff = vb2_ioctl_streamoff, 731 /* Standard handling */ 732 .vidioc_g_std = vidioc_g_std, 733 .vidioc_s_std = vidioc_s_std, 734 .vidioc_querystd = vidioc_querystd, 735 /* Input handling */ 736 .vidioc_enum_input = vidioc_enum_input, 737 .vidioc_g_input = vidioc_g_input, 738 .vidioc_s_input = vidioc_s_input, 739 /* Log status ioctl */ 740 .vidioc_log_status = v4l2_ctrl_log_status, 741 /* Event handling */ 742 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 743 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 744 }; 745 746 static const struct video_device video_dev_template = { 747 .name = KBUILD_MODNAME, 748 .release = video_device_release_empty, 749 .fops = &vip_fops, 750 .ioctl_ops = &vip_ioctl_ops, 751 .tvnorms = V4L2_STD_ALL, 752 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 753 V4L2_CAP_STREAMING, 754 }; 755 756 /** 757 * vip_irq - interrupt routine 758 * @irq: Number of interrupt ( not used, correct number is assumed ) 759 * @vip: local data structure containing all information 760 * 761 * check for both frame interrupts set ( top and bottom ). 762 * check FIFO overflow, but limit number of log messages after open. 763 * signal a complete buffer if done 764 * 765 * return value: IRQ_NONE, interrupt was not generated by VIP 766 * 767 * IRQ_HANDLED, interrupt done. 768 */ 769 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip) 770 { 771 unsigned int status; 772 773 status = reg_read(vip, DVP_ITS); 774 775 if (!status) /* No interrupt to handle */ 776 return IRQ_NONE; 777 778 if (status & DVP_IT_FIFO) 779 if (vip->overflow++ > 5) 780 pr_info("VIP: fifo overflow\n"); 781 782 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { 783 /* this is bad, we are too slow, hope the condition is gone 784 * on the next frame */ 785 return IRQ_HANDLED; 786 } 787 788 if (status & DVP_IT_VST) 789 if ((++vip->tcount) < 2) 790 return IRQ_HANDLED; 791 if (status & DVP_IT_VSB) { 792 vip->bcount++; 793 return IRQ_HANDLED; 794 } 795 796 if (vip->active) { /* Acquisition is over on this buffer */ 797 /* Disable acquisition */ 798 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 799 /* Remove the active buffer from the list */ 800 vip->active->vb.vb2_buf.timestamp = ktime_get_ns(); 801 vip->active->vb.sequence = vip->sequence++; 802 vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE); 803 } 804 805 return IRQ_HANDLED; 806 } 807 808 static void sta2x11_vip_init_register(struct sta2x11_vip *vip) 809 { 810 /* Register initialization */ 811 spin_lock_irq(&vip->slock); 812 /* Clean interrupt */ 813 reg_read(vip, DVP_ITS); 814 /* Enable Half Line per vertical */ 815 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); 816 /* Reset VIP control */ 817 reg_write(vip, DVP_CTL, DVP_CTL_RST); 818 /* Clear VIP control */ 819 reg_write(vip, DVP_CTL, 0); 820 spin_unlock_irq(&vip->slock); 821 } 822 static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) 823 { 824 spin_lock_irq(&vip->slock); 825 /* Disable interrupt */ 826 reg_write(vip, DVP_ITM, 0); 827 /* Reset VIP Control */ 828 reg_write(vip, DVP_CTL, DVP_CTL_RST); 829 /* Clear VIP Control */ 830 reg_write(vip, DVP_CTL, 0); 831 /* Clean VIP Interrupt */ 832 reg_read(vip, DVP_ITS); 833 spin_unlock_irq(&vip->slock); 834 } 835 static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) 836 { 837 int err; 838 839 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); 840 if (err) { 841 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); 842 return err; 843 } 844 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); 845 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 846 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; 847 vip->vb_vidq.drv_priv = vip; 848 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); 849 vip->vb_vidq.ops = &vip_video_qops; 850 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; 851 vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 852 vip->vb_vidq.dev = &vip->pdev->dev; 853 vip->vb_vidq.lock = &vip->v4l_lock; 854 err = vb2_queue_init(&vip->vb_vidq); 855 if (err) 856 return err; 857 INIT_LIST_HEAD(&vip->buffer_list); 858 spin_lock_init(&vip->lock); 859 return 0; 860 } 861 862 static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) 863 { 864 /* 865 * Inititialize an empty control so VIP can inerithing controls 866 * from ADV7180 867 */ 868 v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); 869 870 vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; 871 if (vip->ctrl_hdl.error) { 872 int err = vip->ctrl_hdl.error; 873 874 v4l2_ctrl_handler_free(&vip->ctrl_hdl); 875 return err; 876 } 877 878 return 0; 879 } 880 881 /** 882 * vip_gpio_reserve - reserve gpio pin 883 * @dev: device 884 * @pin: GPIO pin number 885 * @dir: direction, input or output 886 * @name: GPIO pin name 887 * 888 */ 889 static int vip_gpio_reserve(struct device *dev, int pin, int dir, 890 const char *name) 891 { 892 int ret = -ENODEV; 893 894 if (!gpio_is_valid(pin)) 895 return ret; 896 897 ret = gpio_request(pin, name); 898 if (ret) { 899 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); 900 return ret; 901 } 902 903 ret = gpio_direction_output(pin, dir); 904 if (ret) { 905 dev_err(dev, "Failed to set direction for pin %d (%s)\n", 906 pin, name); 907 gpio_free(pin); 908 return ret; 909 } 910 911 ret = gpio_export(pin, false); 912 if (ret) { 913 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); 914 gpio_free(pin); 915 return ret; 916 } 917 918 return 0; 919 } 920 921 /** 922 * vip_gpio_release - release gpio pin 923 * @dev: device 924 * @pin: GPIO pin number 925 * @name: GPIO pin name 926 * 927 */ 928 static void vip_gpio_release(struct device *dev, int pin, const char *name) 929 { 930 if (gpio_is_valid(pin)) { 931 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); 932 gpio_unexport(pin); 933 gpio_free(pin); 934 } 935 } 936 937 /** 938 * sta2x11_vip_init_one - init one instance of video device 939 * @pdev: PCI device 940 * @ent: (not used) 941 * 942 * allocate reset pins for DAC. 943 * Reset video DAC, this is done via reset line. 944 * allocate memory for managing device 945 * request interrupt 946 * map IO region 947 * register device 948 * find and initialize video DAC 949 * 950 * return value: 0, no error 951 * 952 * -ENOMEM, no memory 953 * 954 * -ENODEV, device could not be detected or registered 955 */ 956 static int sta2x11_vip_init_one(struct pci_dev *pdev, 957 const struct pci_device_id *ent) 958 { 959 int ret; 960 struct sta2x11_vip *vip; 961 struct vip_config *config; 962 963 /* Check if hardware support 26-bit DMA */ 964 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { 965 dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); 966 return -EINVAL; 967 } 968 /* Enable PCI */ 969 ret = pci_enable_device(pdev); 970 if (ret) 971 return ret; 972 973 /* Get VIP platform data */ 974 config = dev_get_platdata(&pdev->dev); 975 if (!config) { 976 dev_info(&pdev->dev, "VIP slot disabled\n"); 977 ret = -EINVAL; 978 goto disable; 979 } 980 981 /* Power configuration */ 982 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, 983 config->pwr_name); 984 if (ret) 985 goto disable; 986 987 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, 988 config->reset_name); 989 if (ret) { 990 vip_gpio_release(&pdev->dev, config->pwr_pin, 991 config->pwr_name); 992 goto disable; 993 } 994 995 if (gpio_is_valid(config->pwr_pin)) { 996 /* Datasheet says 5ms between PWR and RST */ 997 usleep_range(5000, 25000); 998 gpio_direction_output(config->pwr_pin, 1); 999 } 1000 1001 if (gpio_is_valid(config->reset_pin)) { 1002 /* Datasheet says 5ms between PWR and RST */ 1003 usleep_range(5000, 25000); 1004 gpio_direction_output(config->reset_pin, 1); 1005 } 1006 usleep_range(5000, 25000); 1007 1008 /* Allocate a new VIP instance */ 1009 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); 1010 if (!vip) { 1011 ret = -ENOMEM; 1012 goto release_gpios; 1013 } 1014 vip->pdev = pdev; 1015 vip->std = V4L2_STD_PAL; 1016 vip->format = formats_50[0]; 1017 vip->config = config; 1018 mutex_init(&vip->v4l_lock); 1019 1020 ret = sta2x11_vip_init_controls(vip); 1021 if (ret) 1022 goto free_mem; 1023 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); 1024 if (ret) 1025 goto free_mem; 1026 1027 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", 1028 (unsigned long)pci_resource_start(pdev, 0), 1029 (unsigned long)pci_resource_len(pdev, 0), pdev->irq); 1030 1031 pci_set_master(pdev); 1032 1033 ret = pci_request_regions(pdev, KBUILD_MODNAME); 1034 if (ret) 1035 goto unreg; 1036 1037 vip->iomem = pci_iomap(pdev, 0, 0x100); 1038 if (!vip->iomem) { 1039 ret = -ENOMEM; 1040 goto release; 1041 } 1042 1043 pci_enable_msi(pdev); 1044 1045 /* Initialize buffer */ 1046 ret = sta2x11_vip_init_buffer(vip); 1047 if (ret) 1048 goto unmap; 1049 1050 spin_lock_init(&vip->slock); 1051 1052 ret = request_irq(pdev->irq, 1053 (irq_handler_t) vip_irq, 1054 IRQF_SHARED, KBUILD_MODNAME, vip); 1055 if (ret) { 1056 dev_err(&pdev->dev, "request_irq failed\n"); 1057 ret = -ENODEV; 1058 goto release_buf; 1059 } 1060 1061 /* Initialize and register video device */ 1062 vip->video_dev = video_dev_template; 1063 vip->video_dev.v4l2_dev = &vip->v4l2_dev; 1064 vip->video_dev.queue = &vip->vb_vidq; 1065 vip->video_dev.lock = &vip->v4l_lock; 1066 video_set_drvdata(&vip->video_dev, vip); 1067 1068 ret = video_register_device(&vip->video_dev, VFL_TYPE_VIDEO, -1); 1069 if (ret) 1070 goto vrelease; 1071 1072 /* Get ADV7180 subdevice */ 1073 vip->adapter = i2c_get_adapter(vip->config->i2c_id); 1074 if (!vip->adapter) { 1075 ret = -ENODEV; 1076 dev_err(&pdev->dev, "no I2C adapter found\n"); 1077 goto vunreg; 1078 } 1079 1080 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, 1081 "adv7180", vip->config->i2c_addr, 1082 NULL); 1083 if (!vip->decoder) { 1084 ret = -ENODEV; 1085 dev_err(&pdev->dev, "no decoder found\n"); 1086 goto vunreg; 1087 } 1088 1089 i2c_put_adapter(vip->adapter); 1090 v4l2_subdev_call(vip->decoder, core, init, 0); 1091 1092 sta2x11_vip_init_register(vip); 1093 1094 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); 1095 return 0; 1096 1097 vunreg: 1098 video_set_drvdata(&vip->video_dev, NULL); 1099 vrelease: 1100 vb2_video_unregister_device(&vip->video_dev); 1101 free_irq(pdev->irq, vip); 1102 release_buf: 1103 pci_disable_msi(pdev); 1104 unmap: 1105 pci_iounmap(pdev, vip->iomem); 1106 release: 1107 pci_release_regions(pdev); 1108 unreg: 1109 v4l2_device_unregister(&vip->v4l2_dev); 1110 free_mem: 1111 kfree(vip); 1112 release_gpios: 1113 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); 1114 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); 1115 disable: 1116 /* 1117 * do not call pci_disable_device on sta2x11 because it break all 1118 * other Bus masters on this EP 1119 */ 1120 return ret; 1121 } 1122 1123 /** 1124 * sta2x11_vip_remove_one - release device 1125 * @pdev: PCI device 1126 * 1127 * Undo everything done in .._init_one 1128 * 1129 * unregister video device 1130 * free interrupt 1131 * unmap ioadresses 1132 * free memory 1133 * free GPIO pins 1134 */ 1135 static void sta2x11_vip_remove_one(struct pci_dev *pdev) 1136 { 1137 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1138 struct sta2x11_vip *vip = 1139 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1140 1141 sta2x11_vip_clear_register(vip); 1142 1143 video_set_drvdata(&vip->video_dev, NULL); 1144 vb2_video_unregister_device(&vip->video_dev); 1145 free_irq(pdev->irq, vip); 1146 pci_disable_msi(pdev); 1147 pci_iounmap(pdev, vip->iomem); 1148 pci_release_regions(pdev); 1149 1150 v4l2_device_unregister(&vip->v4l2_dev); 1151 1152 vip_gpio_release(&pdev->dev, vip->config->pwr_pin, 1153 vip->config->pwr_name); 1154 vip_gpio_release(&pdev->dev, vip->config->reset_pin, 1155 vip->config->reset_name); 1156 1157 kfree(vip); 1158 /* 1159 * do not call pci_disable_device on sta2x11 because it break all 1160 * other Bus masters on this EP 1161 */ 1162 } 1163 1164 /** 1165 * sta2x11_vip_suspend - set device into power save mode 1166 * @dev_d: PCI device 1167 * 1168 * all relevant registers are saved and an attempt to set a new state is made. 1169 * 1170 * return value: 0 always indicate success, 1171 * even if device could not be disabled. (workaround for hardware problem) 1172 */ 1173 static int __maybe_unused sta2x11_vip_suspend(struct device *dev_d) 1174 { 1175 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev_d); 1176 struct sta2x11_vip *vip = 1177 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1178 unsigned long flags; 1179 int i; 1180 1181 spin_lock_irqsave(&vip->slock, flags); 1182 vip->register_save_area[0] = reg_read(vip, DVP_CTL); 1183 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); 1184 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); 1185 reg_write(vip, DVP_ITM, 0); 1186 for (i = 1; i < SAVE_COUNT; i++) 1187 vip->register_save_area[i] = reg_read(vip, 4 * i); 1188 for (i = 0; i < AUX_COUNT; i++) 1189 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = 1190 reg_read(vip, registers_to_save[i]); 1191 spin_unlock_irqrestore(&vip->slock, flags); 1192 1193 vip->disabled = 1; 1194 1195 pr_info("VIP: suspend\n"); 1196 return 0; 1197 } 1198 1199 /** 1200 * sta2x11_vip_resume - resume device operation 1201 * @dev_d : PCI device 1202 * 1203 * return value: 0, no error. 1204 * 1205 * other, could not set device to power on state. 1206 */ 1207 static int __maybe_unused sta2x11_vip_resume(struct device *dev_d) 1208 { 1209 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev_d); 1210 struct sta2x11_vip *vip = 1211 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1212 unsigned long flags; 1213 int i; 1214 1215 pr_info("VIP: resume\n"); 1216 1217 vip->disabled = 0; 1218 1219 spin_lock_irqsave(&vip->slock, flags); 1220 for (i = 1; i < SAVE_COUNT; i++) 1221 reg_write(vip, 4 * i, vip->register_save_area[i]); 1222 for (i = 0; i < AUX_COUNT; i++) 1223 reg_write(vip, registers_to_save[i], 1224 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); 1225 reg_write(vip, DVP_CTL, vip->register_save_area[0]); 1226 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); 1227 spin_unlock_irqrestore(&vip->slock, flags); 1228 return 0; 1229 } 1230 1231 static const struct pci_device_id sta2x11_vip_pci_tbl[] = { 1232 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, 1233 {0,} 1234 }; 1235 1236 static SIMPLE_DEV_PM_OPS(sta2x11_vip_pm_ops, 1237 sta2x11_vip_suspend, 1238 sta2x11_vip_resume); 1239 1240 static struct pci_driver sta2x11_vip_driver = { 1241 .name = KBUILD_MODNAME, 1242 .probe = sta2x11_vip_init_one, 1243 .remove = sta2x11_vip_remove_one, 1244 .id_table = sta2x11_vip_pci_tbl, 1245 .driver.pm = &sta2x11_vip_pm_ops, 1246 }; 1247 1248 static int __init sta2x11_vip_init_module(void) 1249 { 1250 return pci_register_driver(&sta2x11_vip_driver); 1251 } 1252 1253 static void __exit sta2x11_vip_exit_module(void) 1254 { 1255 pci_unregister_driver(&sta2x11_vip_driver); 1256 } 1257 1258 #ifdef MODULE 1259 module_init(sta2x11_vip_init_module); 1260 module_exit(sta2x11_vip_exit_module); 1261 #else 1262 late_initcall_sync(sta2x11_vip_init_module); 1263 #endif 1264 1265 MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); 1266 MODULE_AUTHOR("Wind River"); 1267 MODULE_LICENSE("GPL v2"); 1268 MODULE_VERSION(DRV_VERSION); 1269 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); 1270