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/consumer.h> 22 #include <linux/gpio.h> 23 #include <linux/i2c.h> 24 #include <linux/delay.h> 25 #include <media/v4l2-common.h> 26 #include <media/v4l2-device.h> 27 #include <media/v4l2-ctrls.h> 28 #include <media/v4l2-ioctl.h> 29 #include <media/v4l2-fh.h> 30 #include <media/v4l2-event.h> 31 #include <media/videobuf2-dma-contig.h> 32 33 #include "sta2x11_vip.h" 34 35 #define DRV_VERSION "1.3" 36 37 #ifndef PCI_DEVICE_ID_STMICRO_VIP 38 #define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D 39 #endif 40 41 #define MAX_FRAMES 4 42 43 /*Register offsets*/ 44 #define DVP_CTL 0x00 45 #define DVP_TFO 0x04 46 #define DVP_TFS 0x08 47 #define DVP_BFO 0x0C 48 #define DVP_BFS 0x10 49 #define DVP_VTP 0x14 50 #define DVP_VBP 0x18 51 #define DVP_VMP 0x1C 52 #define DVP_ITM 0x98 53 #define DVP_ITS 0x9C 54 #define DVP_STA 0xA0 55 #define DVP_HLFLN 0xA8 56 #define DVP_RGB 0xC0 57 #define DVP_PKZ 0xF0 58 59 /*Register fields*/ 60 #define DVP_CTL_ENA 0x00000001 61 #define DVP_CTL_RST 0x80000000 62 #define DVP_CTL_DIS (~0x00040001) 63 64 #define DVP_IT_VSB 0x00000008 65 #define DVP_IT_VST 0x00000010 66 #define DVP_IT_FIFO 0x00000020 67 68 #define DVP_HLFLN_SD 0x00000001 69 70 #define SAVE_COUNT 8 71 #define AUX_COUNT 3 72 #define IRQ_COUNT 1 73 74 75 struct vip_buffer { 76 struct vb2_v4l2_buffer vb; 77 struct list_head list; 78 dma_addr_t dma; 79 }; 80 static inline struct vip_buffer *to_vip_buffer(struct vb2_v4l2_buffer *vb2) 81 { 82 return container_of(vb2, struct vip_buffer, vb); 83 } 84 85 /** 86 * struct sta2x11_vip - All internal data for one instance of device 87 * @v4l2_dev: device registered in v4l layer 88 * @video_dev: properties of our device 89 * @pdev: PCI device 90 * @adapter: contains I2C adapter information 91 * @register_save_area: All relevant register are saved here during suspend 92 * @decoder: contains information about video DAC 93 * @ctrl_hdl: handler for control framework 94 * @format: pixel format, fixed UYVY 95 * @std: video standard (e.g. PAL/NTSC) 96 * @input: input line for video signal ( 0 or 1 ) 97 * @disabled: Device is in power down state 98 * @slock: for excluse access of registers 99 * @vb_vidq: queue maintained by videobuf2 layer 100 * @buffer_list: list of buffer in use 101 * @sequence: sequence number of acquired buffer 102 * @active: current active buffer 103 * @lock: used in videobuf2 callback 104 * @v4l_lock: serialize its video4linux ioctls 105 * @tcount: Number of top frames 106 * @bcount: Number of bottom frames 107 * @overflow: Number of FIFO overflows 108 * @iomem: hardware base address 109 * @config: I2C and gpio config from platform 110 * 111 * All non-local data is accessed via this structure. 112 */ 113 struct sta2x11_vip { 114 struct v4l2_device v4l2_dev; 115 struct video_device video_dev; 116 struct pci_dev *pdev; 117 struct i2c_adapter *adapter; 118 unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT]; 119 struct v4l2_subdev *decoder; 120 struct v4l2_ctrl_handler ctrl_hdl; 121 122 123 struct v4l2_pix_format format; 124 v4l2_std_id std; 125 unsigned int input; 126 int disabled; 127 spinlock_t slock; 128 129 struct vb2_queue vb_vidq; 130 struct list_head buffer_list; 131 unsigned int sequence; 132 struct vip_buffer *active; /* current active buffer */ 133 spinlock_t lock; /* Used in videobuf2 callback */ 134 struct mutex v4l_lock; 135 136 /* Interrupt counters */ 137 int tcount, bcount; 138 int overflow; 139 140 void __iomem *iomem; /* I/O Memory */ 141 struct vip_config *config; 142 }; 143 144 static const unsigned int registers_to_save[AUX_COUNT] = { 145 DVP_HLFLN, DVP_RGB, DVP_PKZ 146 }; 147 148 static struct v4l2_pix_format formats_50[] = { 149 { /*PAL interlaced */ 150 .width = 720, 151 .height = 576, 152 .pixelformat = V4L2_PIX_FMT_UYVY, 153 .field = V4L2_FIELD_INTERLACED, 154 .bytesperline = 720 * 2, 155 .sizeimage = 720 * 2 * 576, 156 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 157 { /*PAL top */ 158 .width = 720, 159 .height = 288, 160 .pixelformat = V4L2_PIX_FMT_UYVY, 161 .field = V4L2_FIELD_TOP, 162 .bytesperline = 720 * 2, 163 .sizeimage = 720 * 2 * 288, 164 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 165 { /*PAL bottom */ 166 .width = 720, 167 .height = 288, 168 .pixelformat = V4L2_PIX_FMT_UYVY, 169 .field = V4L2_FIELD_BOTTOM, 170 .bytesperline = 720 * 2, 171 .sizeimage = 720 * 2 * 288, 172 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 173 174 }; 175 176 static struct v4l2_pix_format formats_60[] = { 177 { /*NTSC interlaced */ 178 .width = 720, 179 .height = 480, 180 .pixelformat = V4L2_PIX_FMT_UYVY, 181 .field = V4L2_FIELD_INTERLACED, 182 .bytesperline = 720 * 2, 183 .sizeimage = 720 * 2 * 480, 184 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 185 { /*NTSC top */ 186 .width = 720, 187 .height = 240, 188 .pixelformat = V4L2_PIX_FMT_UYVY, 189 .field = V4L2_FIELD_TOP, 190 .bytesperline = 720 * 2, 191 .sizeimage = 720 * 2 * 240, 192 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 193 { /*NTSC bottom */ 194 .width = 720, 195 .height = 240, 196 .pixelformat = V4L2_PIX_FMT_UYVY, 197 .field = V4L2_FIELD_BOTTOM, 198 .bytesperline = 720 * 2, 199 .sizeimage = 720 * 2 * 240, 200 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 201 }; 202 203 /* Write VIP register */ 204 static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val) 205 { 206 iowrite32((val), (vip->iomem)+(reg)); 207 } 208 /* Read VIP register */ 209 static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg) 210 { 211 return ioread32((vip->iomem)+(reg)); 212 } 213 /* Start DMA acquisition */ 214 static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf) 215 { 216 unsigned long offset = 0; 217 218 if (vip->format.field == V4L2_FIELD_INTERLACED) 219 offset = vip->format.width * 2; 220 221 spin_lock_irq(&vip->slock); 222 /* Enable acquisition */ 223 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) | DVP_CTL_ENA); 224 /* Set Top and Bottom Field memory address */ 225 reg_write(vip, DVP_VTP, (u32)vip_buf->dma); 226 reg_write(vip, DVP_VBP, (u32)vip_buf->dma + offset); 227 spin_unlock_irq(&vip->slock); 228 } 229 230 /* Fetch the next buffer to activate */ 231 static void vip_active_buf_next(struct sta2x11_vip *vip) 232 { 233 /* Get the next buffer */ 234 spin_lock(&vip->lock); 235 if (list_empty(&vip->buffer_list)) {/* No available buffer */ 236 spin_unlock(&vip->lock); 237 return; 238 } 239 vip->active = list_first_entry(&vip->buffer_list, 240 struct vip_buffer, 241 list); 242 /* Reset Top and Bottom counter */ 243 vip->tcount = 0; 244 vip->bcount = 0; 245 spin_unlock(&vip->lock); 246 if (vb2_is_streaming(&vip->vb_vidq)) { /* streaming is on */ 247 start_dma(vip, vip->active); /* start dma capture */ 248 } 249 } 250 251 252 /* Videobuf2 Operations */ 253 static int queue_setup(struct vb2_queue *vq, 254 unsigned int *nbuffers, unsigned int *nplanes, 255 unsigned int sizes[], struct device *alloc_devs[]) 256 { 257 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 258 259 if (!(*nbuffers) || *nbuffers < MAX_FRAMES) 260 *nbuffers = MAX_FRAMES; 261 262 *nplanes = 1; 263 sizes[0] = vip->format.sizeimage; 264 265 vip->sequence = 0; 266 vip->active = NULL; 267 vip->tcount = 0; 268 vip->bcount = 0; 269 270 return 0; 271 }; 272 static int buffer_init(struct vb2_buffer *vb) 273 { 274 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 275 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 276 277 vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, 0); 278 INIT_LIST_HEAD(&vip_buf->list); 279 return 0; 280 } 281 282 static int buffer_prepare(struct vb2_buffer *vb) 283 { 284 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 285 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 286 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 287 unsigned long size; 288 289 size = vip->format.sizeimage; 290 if (vb2_plane_size(vb, 0) < size) { 291 v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n", 292 vb2_plane_size(vb, 0), size); 293 return -EINVAL; 294 } 295 296 vb2_set_plane_payload(&vip_buf->vb.vb2_buf, 0, size); 297 298 return 0; 299 } 300 static void buffer_queue(struct vb2_buffer *vb) 301 { 302 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 303 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 304 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 305 306 spin_lock(&vip->lock); 307 list_add_tail(&vip_buf->list, &vip->buffer_list); 308 if (!vip->active) { /* No active buffer, active the first one */ 309 vip->active = list_first_entry(&vip->buffer_list, 310 struct vip_buffer, 311 list); 312 if (vb2_is_streaming(&vip->vb_vidq)) /* streaming is on */ 313 start_dma(vip, vip_buf); /* start dma capture */ 314 } 315 spin_unlock(&vip->lock); 316 } 317 static void buffer_finish(struct vb2_buffer *vb) 318 { 319 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 320 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 321 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 322 323 /* Buffer handled, remove it from the list */ 324 spin_lock(&vip->lock); 325 list_del_init(&vip_buf->list); 326 spin_unlock(&vip->lock); 327 328 if (vb2_is_streaming(vb->vb2_queue)) 329 vip_active_buf_next(vip); 330 } 331 332 static int start_streaming(struct vb2_queue *vq, unsigned int count) 333 { 334 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 335 336 spin_lock_irq(&vip->slock); 337 /* Enable interrupt VSYNC Top and Bottom*/ 338 reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST); 339 spin_unlock_irq(&vip->slock); 340 341 if (count) 342 start_dma(vip, vip->active); 343 344 return 0; 345 } 346 347 /* abort streaming and wait for last buffer */ 348 static void stop_streaming(struct vb2_queue *vq) 349 { 350 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 351 struct vip_buffer *vip_buf, *node; 352 353 /* Disable acquisition */ 354 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 355 /* Disable all interrupts */ 356 reg_write(vip, DVP_ITM, 0); 357 358 /* Release all active buffers */ 359 spin_lock(&vip->lock); 360 list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) { 361 vb2_buffer_done(&vip_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 362 list_del(&vip_buf->list); 363 } 364 spin_unlock(&vip->lock); 365 } 366 367 static const struct vb2_ops vip_video_qops = { 368 .queue_setup = queue_setup, 369 .buf_init = buffer_init, 370 .buf_prepare = buffer_prepare, 371 .buf_finish = buffer_finish, 372 .buf_queue = buffer_queue, 373 .start_streaming = start_streaming, 374 .stop_streaming = stop_streaming, 375 }; 376 377 378 /* File Operations */ 379 static const struct v4l2_file_operations vip_fops = { 380 .owner = THIS_MODULE, 381 .open = v4l2_fh_open, 382 .release = vb2_fop_release, 383 .unlocked_ioctl = video_ioctl2, 384 .read = vb2_fop_read, 385 .mmap = vb2_fop_mmap, 386 .poll = vb2_fop_poll 387 }; 388 389 390 /** 391 * vidioc_querycap - return capabilities of device 392 * @file: descriptor of device 393 * @cap: contains return values 394 * @priv: unused 395 * 396 * the capabilities of the device are returned 397 * 398 * return value: 0, no error. 399 */ 400 static int vidioc_querycap(struct file *file, void *priv, 401 struct v4l2_capability *cap) 402 { 403 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); 404 strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card)); 405 return 0; 406 } 407 408 /** 409 * vidioc_s_std - set video standard 410 * @file: descriptor of device 411 * @std: contains standard to be set 412 * @priv: unused 413 * 414 * the video standard is set 415 * 416 * return value: 0, no error. 417 * 418 * -EIO, no input signal detected 419 * 420 * other, returned from video DAC. 421 */ 422 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) 423 { 424 struct sta2x11_vip *vip = video_drvdata(file); 425 426 /* 427 * This is here for backwards compatibility only. 428 * The use of V4L2_STD_ALL to trigger a querystd is non-standard. 429 */ 430 if (std == V4L2_STD_ALL) { 431 v4l2_subdev_call(vip->decoder, video, querystd, &std); 432 if (std == V4L2_STD_UNKNOWN) 433 return -EIO; 434 } 435 436 if (vip->std != std) { 437 vip->std = std; 438 if (V4L2_STD_525_60 & std) 439 vip->format = formats_60[0]; 440 else 441 vip->format = formats_50[0]; 442 } 443 444 return v4l2_subdev_call(vip->decoder, video, s_std, std); 445 } 446 447 /** 448 * vidioc_g_std - get video standard 449 * @file: descriptor of device 450 * @priv: unused 451 * @std: contains return values 452 * 453 * the current video standard is returned 454 * 455 * return value: 0, no error. 456 */ 457 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) 458 { 459 struct sta2x11_vip *vip = video_drvdata(file); 460 461 *std = vip->std; 462 return 0; 463 } 464 465 /** 466 * vidioc_querystd - get possible video standards 467 * @file: descriptor of device 468 * @priv: unused 469 * @std: contains return values 470 * 471 * all possible video standards are returned 472 * 473 * return value: delivered by video DAC routine. 474 */ 475 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) 476 { 477 struct sta2x11_vip *vip = video_drvdata(file); 478 479 return v4l2_subdev_call(vip->decoder, video, querystd, std); 480 } 481 482 static int vidioc_enum_input(struct file *file, void *priv, 483 struct v4l2_input *inp) 484 { 485 if (inp->index > 1) 486 return -EINVAL; 487 488 inp->type = V4L2_INPUT_TYPE_CAMERA; 489 inp->std = V4L2_STD_ALL; 490 sprintf(inp->name, "Camera %u", inp->index); 491 492 return 0; 493 } 494 495 /** 496 * vidioc_s_input - set input line 497 * @file: descriptor of device 498 * @priv: unused 499 * @i: new input line number 500 * 501 * the current active input line is set 502 * 503 * return value: 0, no error. 504 * 505 * -EINVAL, line number out of range 506 */ 507 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 508 { 509 struct sta2x11_vip *vip = video_drvdata(file); 510 int ret; 511 512 if (i > 1) 513 return -EINVAL; 514 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); 515 516 if (!ret) 517 vip->input = i; 518 519 return 0; 520 } 521 522 /** 523 * vidioc_g_input - return input line 524 * @file: descriptor of device 525 * @priv: unused 526 * @i: returned input line number 527 * 528 * the current active input line is returned 529 * 530 * return value: always 0. 531 */ 532 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 533 { 534 struct sta2x11_vip *vip = video_drvdata(file); 535 536 *i = vip->input; 537 return 0; 538 } 539 540 /** 541 * vidioc_enum_fmt_vid_cap - return video capture format 542 * @file: descriptor of device 543 * @priv: unused 544 * @f: returned format information 545 * 546 * returns name and format of video capture 547 * Only UYVY is supported by hardware. 548 * 549 * return value: always 0. 550 */ 551 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 552 struct v4l2_fmtdesc *f) 553 { 554 555 if (f->index != 0) 556 return -EINVAL; 557 558 f->pixelformat = V4L2_PIX_FMT_UYVY; 559 return 0; 560 } 561 562 /** 563 * vidioc_try_fmt_vid_cap - set video capture format 564 * @file: descriptor of device 565 * @priv: unused 566 * @f: new format 567 * 568 * new video format is set which includes width and 569 * field type. width is fixed to 720, no scaling. 570 * Only UYVY is supported by this hardware. 571 * the minimum height is 200, the maximum is 576 (PAL) 572 * 573 * return value: 0, no error 574 * 575 * -EINVAL, pixel or field format not supported 576 * 577 */ 578 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 579 struct v4l2_format *f) 580 { 581 struct sta2x11_vip *vip = video_drvdata(file); 582 int interlace_lim; 583 584 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { 585 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n"); 586 return -EINVAL; 587 } 588 589 if (V4L2_STD_525_60 & vip->std) 590 interlace_lim = 240; 591 else 592 interlace_lim = 288; 593 594 switch (f->fmt.pix.field) { 595 default: 596 case V4L2_FIELD_ANY: 597 if (interlace_lim < f->fmt.pix.height) 598 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 599 else 600 f->fmt.pix.field = V4L2_FIELD_BOTTOM; 601 break; 602 case V4L2_FIELD_TOP: 603 case V4L2_FIELD_BOTTOM: 604 if (interlace_lim < f->fmt.pix.height) 605 f->fmt.pix.height = interlace_lim; 606 break; 607 case V4L2_FIELD_INTERLACED: 608 break; 609 } 610 611 /* It is the only supported format */ 612 f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; 613 f->fmt.pix.height &= ~1; 614 if (2 * interlace_lim < f->fmt.pix.height) 615 f->fmt.pix.height = 2 * interlace_lim; 616 if (200 > f->fmt.pix.height) 617 f->fmt.pix.height = 200; 618 f->fmt.pix.width = 720; 619 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 620 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; 621 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 622 return 0; 623 } 624 625 /** 626 * vidioc_s_fmt_vid_cap - set current video format parameters 627 * @file: descriptor of device 628 * @priv: unused 629 * @f: returned format information 630 * 631 * set new capture format 632 * return value: 0, no error 633 * 634 * other, delivered by video DAC routine. 635 */ 636 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 637 struct v4l2_format *f) 638 { 639 struct sta2x11_vip *vip = video_drvdata(file); 640 unsigned int t_stop, b_stop, pitch; 641 int ret; 642 643 ret = vidioc_try_fmt_vid_cap(file, priv, f); 644 if (ret) 645 return ret; 646 647 if (vb2_is_busy(&vip->vb_vidq)) { 648 /* Can't change format during acquisition */ 649 v4l2_err(&vip->v4l2_dev, "device busy\n"); 650 return -EBUSY; 651 } 652 vip->format = f->fmt.pix; 653 switch (vip->format.field) { 654 case V4L2_FIELD_INTERLACED: 655 t_stop = ((vip->format.height / 2 - 1) << 16) | 656 (2 * vip->format.width - 1); 657 b_stop = t_stop; 658 pitch = 4 * vip->format.width; 659 break; 660 case V4L2_FIELD_TOP: 661 t_stop = ((vip->format.height - 1) << 16) | 662 (2 * vip->format.width - 1); 663 b_stop = (0 << 16) | (2 * vip->format.width - 1); 664 pitch = 2 * vip->format.width; 665 break; 666 case V4L2_FIELD_BOTTOM: 667 t_stop = (0 << 16) | (2 * vip->format.width - 1); 668 b_stop = (vip->format.height << 16) | 669 (2 * vip->format.width - 1); 670 pitch = 2 * vip->format.width; 671 break; 672 default: 673 v4l2_err(&vip->v4l2_dev, "unknown field format\n"); 674 return -EINVAL; 675 } 676 677 spin_lock_irq(&vip->slock); 678 /* Y-X Top Field Offset */ 679 reg_write(vip, DVP_TFO, 0); 680 /* Y-X Bottom Field Offset */ 681 reg_write(vip, DVP_BFO, 0); 682 /* Y-X Top Field Stop*/ 683 reg_write(vip, DVP_TFS, t_stop); 684 /* Y-X Bottom Field Stop */ 685 reg_write(vip, DVP_BFS, b_stop); 686 /* Video Memory Pitch */ 687 reg_write(vip, DVP_VMP, pitch); 688 spin_unlock_irq(&vip->slock); 689 690 return 0; 691 } 692 693 /** 694 * vidioc_g_fmt_vid_cap - get current video format parameters 695 * @file: descriptor of device 696 * @priv: unused 697 * @f: contains format information 698 * 699 * returns current video format parameters 700 * 701 * return value: 0, always successful 702 */ 703 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 704 struct v4l2_format *f) 705 { 706 struct sta2x11_vip *vip = video_drvdata(file); 707 708 f->fmt.pix = vip->format; 709 710 return 0; 711 } 712 713 static const struct v4l2_ioctl_ops vip_ioctl_ops = { 714 .vidioc_querycap = vidioc_querycap, 715 /* FMT handling */ 716 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 717 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 718 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 719 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 720 /* Buffer handlers */ 721 .vidioc_create_bufs = vb2_ioctl_create_bufs, 722 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 723 .vidioc_reqbufs = vb2_ioctl_reqbufs, 724 .vidioc_querybuf = vb2_ioctl_querybuf, 725 .vidioc_qbuf = vb2_ioctl_qbuf, 726 .vidioc_dqbuf = vb2_ioctl_dqbuf, 727 /* Stream on/off */ 728 .vidioc_streamon = vb2_ioctl_streamon, 729 .vidioc_streamoff = vb2_ioctl_streamoff, 730 /* Standard handling */ 731 .vidioc_g_std = vidioc_g_std, 732 .vidioc_s_std = vidioc_s_std, 733 .vidioc_querystd = vidioc_querystd, 734 /* Input handling */ 735 .vidioc_enum_input = vidioc_enum_input, 736 .vidioc_g_input = vidioc_g_input, 737 .vidioc_s_input = vidioc_s_input, 738 /* Log status ioctl */ 739 .vidioc_log_status = v4l2_ctrl_log_status, 740 /* Event handling */ 741 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 742 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 743 }; 744 745 static const struct video_device video_dev_template = { 746 .name = KBUILD_MODNAME, 747 .release = video_device_release_empty, 748 .fops = &vip_fops, 749 .ioctl_ops = &vip_ioctl_ops, 750 .tvnorms = V4L2_STD_ALL, 751 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 752 V4L2_CAP_STREAMING, 753 }; 754 755 /** 756 * vip_irq - interrupt routine 757 * @irq: Number of interrupt ( not used, correct number is assumed ) 758 * @data: local data structure containing all information 759 * 760 * check for both frame interrupts set ( top and bottom ). 761 * check FIFO overflow, but limit number of log messages after open. 762 * signal a complete buffer if done 763 * 764 * return value: IRQ_NONE, interrupt was not generated by VIP 765 * 766 * IRQ_HANDLED, interrupt done. 767 */ 768 static irqreturn_t vip_irq(int irq, void *data) 769 { 770 struct sta2x11_vip *vip = data; 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 struct gpio_desc *desc = gpio_to_desc(pin); 893 int ret = -ENODEV; 894 895 if (!gpio_is_valid(pin)) 896 return ret; 897 898 ret = gpio_request(pin, name); 899 if (ret) { 900 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); 901 return ret; 902 } 903 904 ret = gpiod_direction_output(desc, dir); 905 if (ret) { 906 dev_err(dev, "Failed to set direction for pin %d (%s)\n", 907 pin, name); 908 gpio_free(pin); 909 return ret; 910 } 911 912 ret = gpiod_export(desc, false); 913 if (ret) { 914 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); 915 gpio_free(pin); 916 return ret; 917 } 918 919 return 0; 920 } 921 922 /** 923 * vip_gpio_release - release gpio pin 924 * @dev: device 925 * @pin: GPIO pin number 926 * @name: GPIO pin name 927 * 928 */ 929 static void vip_gpio_release(struct device *dev, int pin, const char *name) 930 { 931 if (gpio_is_valid(pin)) { 932 struct gpio_desc *desc = gpio_to_desc(pin); 933 934 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); 935 gpiod_unexport(desc); 936 gpio_free(pin); 937 } 938 } 939 940 /** 941 * sta2x11_vip_init_one - init one instance of video device 942 * @pdev: PCI device 943 * @ent: (not used) 944 * 945 * allocate reset pins for DAC. 946 * Reset video DAC, this is done via reset line. 947 * allocate memory for managing device 948 * request interrupt 949 * map IO region 950 * register device 951 * find and initialize video DAC 952 * 953 * return value: 0, no error 954 * 955 * -ENOMEM, no memory 956 * 957 * -ENODEV, device could not be detected or registered 958 */ 959 static int sta2x11_vip_init_one(struct pci_dev *pdev, 960 const struct pci_device_id *ent) 961 { 962 int ret; 963 struct sta2x11_vip *vip; 964 struct vip_config *config; 965 966 /* Check if hardware support 26-bit DMA */ 967 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { 968 dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); 969 return -EINVAL; 970 } 971 /* Enable PCI */ 972 ret = pci_enable_device(pdev); 973 if (ret) 974 return ret; 975 976 /* Get VIP platform data */ 977 config = dev_get_platdata(&pdev->dev); 978 if (!config) { 979 dev_info(&pdev->dev, "VIP slot disabled\n"); 980 ret = -EINVAL; 981 goto disable; 982 } 983 984 /* Power configuration */ 985 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, 986 config->pwr_name); 987 if (ret) 988 goto disable; 989 990 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, 991 config->reset_name); 992 if (ret) { 993 vip_gpio_release(&pdev->dev, config->pwr_pin, 994 config->pwr_name); 995 goto disable; 996 } 997 998 if (gpio_is_valid(config->pwr_pin)) { 999 /* Datasheet says 5ms between PWR and RST */ 1000 usleep_range(5000, 25000); 1001 gpio_direction_output(config->pwr_pin, 1); 1002 } 1003 1004 if (gpio_is_valid(config->reset_pin)) { 1005 /* Datasheet says 5ms between PWR and RST */ 1006 usleep_range(5000, 25000); 1007 gpio_direction_output(config->reset_pin, 1); 1008 } 1009 usleep_range(5000, 25000); 1010 1011 /* Allocate a new VIP instance */ 1012 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); 1013 if (!vip) { 1014 ret = -ENOMEM; 1015 goto release_gpios; 1016 } 1017 vip->pdev = pdev; 1018 vip->std = V4L2_STD_PAL; 1019 vip->format = formats_50[0]; 1020 vip->config = config; 1021 mutex_init(&vip->v4l_lock); 1022 1023 ret = sta2x11_vip_init_controls(vip); 1024 if (ret) 1025 goto free_mem; 1026 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); 1027 if (ret) 1028 goto free_mem; 1029 1030 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", 1031 (unsigned long)pci_resource_start(pdev, 0), 1032 (unsigned long)pci_resource_len(pdev, 0), pdev->irq); 1033 1034 pci_set_master(pdev); 1035 1036 ret = pci_request_regions(pdev, KBUILD_MODNAME); 1037 if (ret) 1038 goto unreg; 1039 1040 vip->iomem = pci_iomap(pdev, 0, 0x100); 1041 if (!vip->iomem) { 1042 ret = -ENOMEM; 1043 goto release; 1044 } 1045 1046 pci_enable_msi(pdev); 1047 1048 /* Initialize buffer */ 1049 ret = sta2x11_vip_init_buffer(vip); 1050 if (ret) 1051 goto unmap; 1052 1053 spin_lock_init(&vip->slock); 1054 1055 ret = request_irq(pdev->irq, vip_irq, IRQF_SHARED, KBUILD_MODNAME, vip); 1056 if (ret) { 1057 dev_err(&pdev->dev, "request_irq failed\n"); 1058 ret = -ENODEV; 1059 goto release_buf; 1060 } 1061 1062 /* Initialize and register video device */ 1063 vip->video_dev = video_dev_template; 1064 vip->video_dev.v4l2_dev = &vip->v4l2_dev; 1065 vip->video_dev.queue = &vip->vb_vidq; 1066 vip->video_dev.lock = &vip->v4l_lock; 1067 video_set_drvdata(&vip->video_dev, vip); 1068 1069 ret = video_register_device(&vip->video_dev, VFL_TYPE_VIDEO, -1); 1070 if (ret) 1071 goto vrelease; 1072 1073 /* Get ADV7180 subdevice */ 1074 vip->adapter = i2c_get_adapter(vip->config->i2c_id); 1075 if (!vip->adapter) { 1076 ret = -ENODEV; 1077 dev_err(&pdev->dev, "no I2C adapter found\n"); 1078 goto vunreg; 1079 } 1080 1081 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, 1082 "adv7180", vip->config->i2c_addr, 1083 NULL); 1084 if (!vip->decoder) { 1085 ret = -ENODEV; 1086 dev_err(&pdev->dev, "no decoder found\n"); 1087 goto vunreg; 1088 } 1089 1090 i2c_put_adapter(vip->adapter); 1091 v4l2_subdev_call(vip->decoder, core, init, 0); 1092 1093 sta2x11_vip_init_register(vip); 1094 1095 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); 1096 return 0; 1097 1098 vunreg: 1099 video_set_drvdata(&vip->video_dev, NULL); 1100 vrelease: 1101 vb2_video_unregister_device(&vip->video_dev); 1102 free_irq(pdev->irq, vip); 1103 release_buf: 1104 pci_disable_msi(pdev); 1105 unmap: 1106 pci_iounmap(pdev, vip->iomem); 1107 release: 1108 pci_release_regions(pdev); 1109 unreg: 1110 v4l2_device_unregister(&vip->v4l2_dev); 1111 free_mem: 1112 kfree(vip); 1113 release_gpios: 1114 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); 1115 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); 1116 disable: 1117 /* 1118 * do not call pci_disable_device on sta2x11 because it break all 1119 * other Bus masters on this EP 1120 */ 1121 return ret; 1122 } 1123 1124 /** 1125 * sta2x11_vip_remove_one - release device 1126 * @pdev: PCI device 1127 * 1128 * Undo everything done in .._init_one 1129 * 1130 * unregister video device 1131 * free interrupt 1132 * unmap ioadresses 1133 * free memory 1134 * free GPIO pins 1135 */ 1136 static void sta2x11_vip_remove_one(struct pci_dev *pdev) 1137 { 1138 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1139 struct sta2x11_vip *vip = 1140 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1141 1142 sta2x11_vip_clear_register(vip); 1143 1144 video_set_drvdata(&vip->video_dev, NULL); 1145 vb2_video_unregister_device(&vip->video_dev); 1146 free_irq(pdev->irq, vip); 1147 pci_disable_msi(pdev); 1148 pci_iounmap(pdev, vip->iomem); 1149 pci_release_regions(pdev); 1150 1151 v4l2_device_unregister(&vip->v4l2_dev); 1152 1153 vip_gpio_release(&pdev->dev, vip->config->pwr_pin, 1154 vip->config->pwr_name); 1155 vip_gpio_release(&pdev->dev, vip->config->reset_pin, 1156 vip->config->reset_name); 1157 1158 kfree(vip); 1159 /* 1160 * do not call pci_disable_device on sta2x11 because it break all 1161 * other Bus masters on this EP 1162 */ 1163 } 1164 1165 /** 1166 * sta2x11_vip_suspend - set device into power save mode 1167 * @dev_d: PCI device 1168 * 1169 * all relevant registers are saved and an attempt to set a new state is made. 1170 * 1171 * return value: 0 always indicate success, 1172 * even if device could not be disabled. (workaround for hardware problem) 1173 */ 1174 static int __maybe_unused sta2x11_vip_suspend(struct device *dev_d) 1175 { 1176 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev_d); 1177 struct sta2x11_vip *vip = 1178 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1179 unsigned long flags; 1180 int i; 1181 1182 spin_lock_irqsave(&vip->slock, flags); 1183 vip->register_save_area[0] = reg_read(vip, DVP_CTL); 1184 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); 1185 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); 1186 reg_write(vip, DVP_ITM, 0); 1187 for (i = 1; i < SAVE_COUNT; i++) 1188 vip->register_save_area[i] = reg_read(vip, 4 * i); 1189 for (i = 0; i < AUX_COUNT; i++) 1190 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = 1191 reg_read(vip, registers_to_save[i]); 1192 spin_unlock_irqrestore(&vip->slock, flags); 1193 1194 vip->disabled = 1; 1195 1196 pr_info("VIP: suspend\n"); 1197 return 0; 1198 } 1199 1200 /** 1201 * sta2x11_vip_resume - resume device operation 1202 * @dev_d : PCI device 1203 * 1204 * return value: 0, no error. 1205 * 1206 * other, could not set device to power on state. 1207 */ 1208 static int __maybe_unused sta2x11_vip_resume(struct device *dev_d) 1209 { 1210 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev_d); 1211 struct sta2x11_vip *vip = 1212 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1213 unsigned long flags; 1214 int i; 1215 1216 pr_info("VIP: resume\n"); 1217 1218 vip->disabled = 0; 1219 1220 spin_lock_irqsave(&vip->slock, flags); 1221 for (i = 1; i < SAVE_COUNT; i++) 1222 reg_write(vip, 4 * i, vip->register_save_area[i]); 1223 for (i = 0; i < AUX_COUNT; i++) 1224 reg_write(vip, registers_to_save[i], 1225 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); 1226 reg_write(vip, DVP_CTL, vip->register_save_area[0]); 1227 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); 1228 spin_unlock_irqrestore(&vip->slock, flags); 1229 return 0; 1230 } 1231 1232 static const struct pci_device_id sta2x11_vip_pci_tbl[] = { 1233 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, 1234 {0,} 1235 }; 1236 1237 static SIMPLE_DEV_PM_OPS(sta2x11_vip_pm_ops, 1238 sta2x11_vip_suspend, 1239 sta2x11_vip_resume); 1240 1241 static struct pci_driver sta2x11_vip_driver = { 1242 .name = KBUILD_MODNAME, 1243 .probe = sta2x11_vip_init_one, 1244 .remove = sta2x11_vip_remove_one, 1245 .id_table = sta2x11_vip_pci_tbl, 1246 .driver.pm = &sta2x11_vip_pm_ops, 1247 }; 1248 1249 static int __init sta2x11_vip_init_module(void) 1250 { 1251 return pci_register_driver(&sta2x11_vip_driver); 1252 } 1253 1254 static void __exit sta2x11_vip_exit_module(void) 1255 { 1256 pci_unregister_driver(&sta2x11_vip_driver); 1257 } 1258 1259 #ifdef MODULE 1260 module_init(sta2x11_vip_init_module); 1261 module_exit(sta2x11_vip_exit_module); 1262 #else 1263 late_initcall_sync(sta2x11_vip_init_module); 1264 #endif 1265 1266 MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); 1267 MODULE_AUTHOR("Wind River"); 1268 MODULE_LICENSE("GPL v2"); 1269 MODULE_VERSION(DRV_VERSION); 1270 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); 1271