1 /* 2 * This is the driver for the STA2x11 Video Input Port. 3 * 4 * Copyright (C) 2012 ST Microelectronics 5 * author: Federico Vaga <federico.vaga@gmail.com> 6 * Copyright (C) 2010 WindRiver Systems, Inc. 7 * authors: Andreas Kies <andreas.kies@windriver.com> 8 * Vlad Lungu <vlad.lungu@windriver.com> 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms and conditions of the GNU General Public License, 12 * version 2, as published by the Free Software Foundation. 13 * 14 * This program is distributed in the hope it will be useful, but WITHOUT 15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 17 * more details. 18 * 19 * You should have received a copy of the GNU General Public License along with 20 * this program; if not, write to the Free Software Foundation, Inc., 21 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 22 * 23 * The full GNU General Public License is included in this distribution in 24 * the file called "COPYING". 25 * 26 */ 27 28 #include <linux/types.h> 29 #include <linux/kernel.h> 30 #include <linux/module.h> 31 #include <linux/init.h> 32 #include <linux/videodev2.h> 33 #include <linux/kmod.h> 34 #include <linux/pci.h> 35 #include <linux/interrupt.h> 36 #include <linux/io.h> 37 #include <linux/gpio.h> 38 #include <linux/i2c.h> 39 #include <linux/delay.h> 40 #include <media/v4l2-common.h> 41 #include <media/v4l2-device.h> 42 #include <media/v4l2-ctrls.h> 43 #include <media/v4l2-ioctl.h> 44 #include <media/v4l2-fh.h> 45 #include <media/v4l2-event.h> 46 #include <media/videobuf2-dma-contig.h> 47 48 #include "sta2x11_vip.h" 49 50 #define DRV_VERSION "1.3" 51 52 #ifndef PCI_DEVICE_ID_STMICRO_VIP 53 #define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D 54 #endif 55 56 #define MAX_FRAMES 4 57 58 /*Register offsets*/ 59 #define DVP_CTL 0x00 60 #define DVP_TFO 0x04 61 #define DVP_TFS 0x08 62 #define DVP_BFO 0x0C 63 #define DVP_BFS 0x10 64 #define DVP_VTP 0x14 65 #define DVP_VBP 0x18 66 #define DVP_VMP 0x1C 67 #define DVP_ITM 0x98 68 #define DVP_ITS 0x9C 69 #define DVP_STA 0xA0 70 #define DVP_HLFLN 0xA8 71 #define DVP_RGB 0xC0 72 #define DVP_PKZ 0xF0 73 74 /*Register fields*/ 75 #define DVP_CTL_ENA 0x00000001 76 #define DVP_CTL_RST 0x80000000 77 #define DVP_CTL_DIS (~0x00040001) 78 79 #define DVP_IT_VSB 0x00000008 80 #define DVP_IT_VST 0x00000010 81 #define DVP_IT_FIFO 0x00000020 82 83 #define DVP_HLFLN_SD 0x00000001 84 85 #define SAVE_COUNT 8 86 #define AUX_COUNT 3 87 #define IRQ_COUNT 1 88 89 90 struct vip_buffer { 91 struct vb2_v4l2_buffer vb; 92 struct list_head list; 93 dma_addr_t dma; 94 }; 95 static inline struct vip_buffer *to_vip_buffer(struct vb2_v4l2_buffer *vb2) 96 { 97 return container_of(vb2, struct vip_buffer, vb); 98 } 99 100 /** 101 * struct sta2x11_vip - All internal data for one instance of device 102 * @v4l2_dev: device registered in v4l layer 103 * @video_dev: properties of our device 104 * @pdev: PCI device 105 * @adapter: contains I2C adapter information 106 * @register_save_area: All relevant register are saved here during suspend 107 * @decoder: contains information about video DAC 108 * @ctrl_hdl: handler for control framework 109 * @format: pixel format, fixed UYVY 110 * @std: video standard (e.g. PAL/NTSC) 111 * @input: input line for video signal ( 0 or 1 ) 112 * @disabled: Device is in power down state 113 * @slock: for excluse acces of registers 114 * @alloc_ctx: context for videobuf2 115 * @vb_vidq: queue maintained by videobuf2 layer 116 * @buffer_list: list of buffer in use 117 * @sequence: sequence number of acquired buffer 118 * @active: current active buffer 119 * @lock: used in videobuf2 callback 120 * @tcount: Number of top frames 121 * @bcount: Number of bottom frames 122 * @overflow: Number of FIFO overflows 123 * @iomem: hardware base address 124 * @config: I2C and gpio config from platform 125 * 126 * All non-local data is accessed via this structure. 127 */ 128 struct sta2x11_vip { 129 struct v4l2_device v4l2_dev; 130 struct video_device video_dev; 131 struct pci_dev *pdev; 132 struct i2c_adapter *adapter; 133 unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT]; 134 struct v4l2_subdev *decoder; 135 struct v4l2_ctrl_handler ctrl_hdl; 136 137 138 struct v4l2_pix_format format; 139 v4l2_std_id std; 140 unsigned int input; 141 int disabled; 142 spinlock_t slock; 143 144 struct vb2_alloc_ctx *alloc_ctx; 145 struct vb2_queue vb_vidq; 146 struct list_head buffer_list; 147 unsigned int sequence; 148 struct vip_buffer *active; /* current active buffer */ 149 spinlock_t lock; /* Used in videobuf2 callback */ 150 151 /* Interrupt counters */ 152 int tcount, bcount; 153 int overflow; 154 155 void __iomem *iomem; /* I/O Memory */ 156 struct vip_config *config; 157 }; 158 159 static const unsigned int registers_to_save[AUX_COUNT] = { 160 DVP_HLFLN, DVP_RGB, DVP_PKZ 161 }; 162 163 static struct v4l2_pix_format formats_50[] = { 164 { /*PAL interlaced */ 165 .width = 720, 166 .height = 576, 167 .pixelformat = V4L2_PIX_FMT_UYVY, 168 .field = V4L2_FIELD_INTERLACED, 169 .bytesperline = 720 * 2, 170 .sizeimage = 720 * 2 * 576, 171 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 172 { /*PAL top */ 173 .width = 720, 174 .height = 288, 175 .pixelformat = V4L2_PIX_FMT_UYVY, 176 .field = V4L2_FIELD_TOP, 177 .bytesperline = 720 * 2, 178 .sizeimage = 720 * 2 * 288, 179 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 180 { /*PAL bottom */ 181 .width = 720, 182 .height = 288, 183 .pixelformat = V4L2_PIX_FMT_UYVY, 184 .field = V4L2_FIELD_BOTTOM, 185 .bytesperline = 720 * 2, 186 .sizeimage = 720 * 2 * 288, 187 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 188 189 }; 190 191 static struct v4l2_pix_format formats_60[] = { 192 { /*NTSC interlaced */ 193 .width = 720, 194 .height = 480, 195 .pixelformat = V4L2_PIX_FMT_UYVY, 196 .field = V4L2_FIELD_INTERLACED, 197 .bytesperline = 720 * 2, 198 .sizeimage = 720 * 2 * 480, 199 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 200 { /*NTSC top */ 201 .width = 720, 202 .height = 240, 203 .pixelformat = V4L2_PIX_FMT_UYVY, 204 .field = V4L2_FIELD_TOP, 205 .bytesperline = 720 * 2, 206 .sizeimage = 720 * 2 * 240, 207 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 208 { /*NTSC bottom */ 209 .width = 720, 210 .height = 240, 211 .pixelformat = V4L2_PIX_FMT_UYVY, 212 .field = V4L2_FIELD_BOTTOM, 213 .bytesperline = 720 * 2, 214 .sizeimage = 720 * 2 * 240, 215 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 216 }; 217 218 /* Write VIP register */ 219 static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val) 220 { 221 iowrite32((val), (vip->iomem)+(reg)); 222 } 223 /* Read VIP register */ 224 static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg) 225 { 226 return ioread32((vip->iomem)+(reg)); 227 } 228 /* Start DMA acquisition */ 229 static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf) 230 { 231 unsigned long offset = 0; 232 233 if (vip->format.field == V4L2_FIELD_INTERLACED) 234 offset = vip->format.width * 2; 235 236 spin_lock_irq(&vip->slock); 237 /* Enable acquisition */ 238 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) | DVP_CTL_ENA); 239 /* Set Top and Bottom Field memory address */ 240 reg_write(vip, DVP_VTP, (u32)vip_buf->dma); 241 reg_write(vip, DVP_VBP, (u32)vip_buf->dma + offset); 242 spin_unlock_irq(&vip->slock); 243 } 244 245 /* Fetch the next buffer to activate */ 246 static void vip_active_buf_next(struct sta2x11_vip *vip) 247 { 248 /* Get the next buffer */ 249 spin_lock(&vip->lock); 250 if (list_empty(&vip->buffer_list)) {/* No available buffer */ 251 spin_unlock(&vip->lock); 252 return; 253 } 254 vip->active = list_first_entry(&vip->buffer_list, 255 struct vip_buffer, 256 list); 257 /* Reset Top and Bottom counter */ 258 vip->tcount = 0; 259 vip->bcount = 0; 260 spin_unlock(&vip->lock); 261 if (vb2_is_streaming(&vip->vb_vidq)) { /* streaming is on */ 262 start_dma(vip, vip->active); /* start dma capture */ 263 } 264 } 265 266 267 /* Videobuf2 Operations */ 268 static int queue_setup(struct vb2_queue *vq, 269 unsigned int *nbuffers, unsigned int *nplanes, 270 unsigned int sizes[], void *alloc_ctxs[]) 271 { 272 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 273 274 if (!(*nbuffers) || *nbuffers < MAX_FRAMES) 275 *nbuffers = MAX_FRAMES; 276 277 *nplanes = 1; 278 sizes[0] = vip->format.sizeimage; 279 alloc_ctxs[0] = vip->alloc_ctx; 280 281 vip->sequence = 0; 282 vip->active = NULL; 283 vip->tcount = 0; 284 vip->bcount = 0; 285 286 return 0; 287 }; 288 static int buffer_init(struct vb2_buffer *vb) 289 { 290 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 291 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 292 293 vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, 0); 294 INIT_LIST_HEAD(&vip_buf->list); 295 return 0; 296 } 297 298 static int buffer_prepare(struct vb2_buffer *vb) 299 { 300 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 301 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 302 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 303 unsigned long size; 304 305 size = vip->format.sizeimage; 306 if (vb2_plane_size(vb, 0) < size) { 307 v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n", 308 vb2_plane_size(vb, 0), size); 309 return -EINVAL; 310 } 311 312 vb2_set_plane_payload(&vip_buf->vb.vb2_buf, 0, size); 313 314 return 0; 315 } 316 static void buffer_queue(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 spin_lock(&vip->lock); 323 list_add_tail(&vip_buf->list, &vip->buffer_list); 324 if (!vip->active) { /* No active buffer, active the first one */ 325 vip->active = list_first_entry(&vip->buffer_list, 326 struct vip_buffer, 327 list); 328 if (vb2_is_streaming(&vip->vb_vidq)) /* streaming is on */ 329 start_dma(vip, vip_buf); /* start dma capture */ 330 } 331 spin_unlock(&vip->lock); 332 } 333 static void buffer_finish(struct vb2_buffer *vb) 334 { 335 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 336 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 337 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 338 339 /* Buffer handled, remove it from the list */ 340 spin_lock(&vip->lock); 341 list_del_init(&vip_buf->list); 342 spin_unlock(&vip->lock); 343 344 if (vb2_is_streaming(vb->vb2_queue)) 345 vip_active_buf_next(vip); 346 } 347 348 static int start_streaming(struct vb2_queue *vq, unsigned int count) 349 { 350 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 351 352 spin_lock_irq(&vip->slock); 353 /* Enable interrupt VSYNC Top and Bottom*/ 354 reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST); 355 spin_unlock_irq(&vip->slock); 356 357 if (count) 358 start_dma(vip, vip->active); 359 360 return 0; 361 } 362 363 /* abort streaming and wait for last buffer */ 364 static void stop_streaming(struct vb2_queue *vq) 365 { 366 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 367 struct vip_buffer *vip_buf, *node; 368 369 /* Disable acquisition */ 370 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 371 /* Disable all interrupts */ 372 reg_write(vip, DVP_ITM, 0); 373 374 /* Release all active buffers */ 375 spin_lock(&vip->lock); 376 list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) { 377 vb2_buffer_done(&vip_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 378 list_del(&vip_buf->list); 379 } 380 spin_unlock(&vip->lock); 381 } 382 383 static struct vb2_ops vip_video_qops = { 384 .queue_setup = queue_setup, 385 .buf_init = buffer_init, 386 .buf_prepare = buffer_prepare, 387 .buf_finish = buffer_finish, 388 .buf_queue = buffer_queue, 389 .start_streaming = start_streaming, 390 .stop_streaming = stop_streaming, 391 }; 392 393 394 /* File Operations */ 395 static const struct v4l2_file_operations vip_fops = { 396 .owner = THIS_MODULE, 397 .open = v4l2_fh_open, 398 .release = vb2_fop_release, 399 .unlocked_ioctl = video_ioctl2, 400 .read = vb2_fop_read, 401 .mmap = vb2_fop_mmap, 402 .poll = vb2_fop_poll 403 }; 404 405 406 /** 407 * vidioc_querycap - return capabilities of device 408 * @file: descriptor of device 409 * @cap: contains return values 410 * 411 * the capabilities of the device are returned 412 * 413 * return value: 0, no error. 414 */ 415 static int vidioc_querycap(struct file *file, void *priv, 416 struct v4l2_capability *cap) 417 { 418 struct sta2x11_vip *vip = video_drvdata(file); 419 420 strcpy(cap->driver, KBUILD_MODNAME); 421 strcpy(cap->card, KBUILD_MODNAME); 422 snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s", 423 pci_name(vip->pdev)); 424 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 425 V4L2_CAP_STREAMING; 426 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 427 428 return 0; 429 } 430 431 /** 432 * vidioc_s_std - set video standard 433 * @file: descriptor of device 434 * @std: contains standard to be set 435 * 436 * the video standard is set 437 * 438 * return value: 0, no error. 439 * 440 * -EIO, no input signal detected 441 * 442 * other, returned from video DAC. 443 */ 444 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) 445 { 446 struct sta2x11_vip *vip = video_drvdata(file); 447 448 /* 449 * This is here for backwards compatibility only. 450 * The use of V4L2_STD_ALL to trigger a querystd is non-standard. 451 */ 452 if (std == V4L2_STD_ALL) { 453 v4l2_subdev_call(vip->decoder, video, querystd, &std); 454 if (std == V4L2_STD_UNKNOWN) 455 return -EIO; 456 } 457 458 if (vip->std != std) { 459 vip->std = std; 460 if (V4L2_STD_525_60 & std) 461 vip->format = formats_60[0]; 462 else 463 vip->format = formats_50[0]; 464 } 465 466 return v4l2_subdev_call(vip->decoder, video, s_std, std); 467 } 468 469 /** 470 * vidioc_g_std - get video standard 471 * @file: descriptor of device 472 * @std: contains return values 473 * 474 * the current video standard is returned 475 * 476 * return value: 0, no error. 477 */ 478 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) 479 { 480 struct sta2x11_vip *vip = video_drvdata(file); 481 482 *std = vip->std; 483 return 0; 484 } 485 486 /** 487 * vidioc_querystd - get possible video standards 488 * @file: descriptor of device 489 * @std: contains return values 490 * 491 * all possible video standards are returned 492 * 493 * return value: delivered by video DAC routine. 494 */ 495 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) 496 { 497 struct sta2x11_vip *vip = video_drvdata(file); 498 499 return v4l2_subdev_call(vip->decoder, video, querystd, std); 500 } 501 502 static int vidioc_enum_input(struct file *file, void *priv, 503 struct v4l2_input *inp) 504 { 505 if (inp->index > 1) 506 return -EINVAL; 507 508 inp->type = V4L2_INPUT_TYPE_CAMERA; 509 inp->std = V4L2_STD_ALL; 510 sprintf(inp->name, "Camera %u", inp->index); 511 512 return 0; 513 } 514 515 /** 516 * vidioc_s_input - set input line 517 * @file: descriptor of device 518 * @i: new input line number 519 * 520 * the current active input line is set 521 * 522 * return value: 0, no error. 523 * 524 * -EINVAL, line number out of range 525 */ 526 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 527 { 528 struct sta2x11_vip *vip = video_drvdata(file); 529 int ret; 530 531 if (i > 1) 532 return -EINVAL; 533 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); 534 535 if (!ret) 536 vip->input = i; 537 538 return 0; 539 } 540 541 /** 542 * vidioc_g_input - return input line 543 * @file: descriptor of device 544 * @i: returned input line number 545 * 546 * the current active input line is returned 547 * 548 * return value: always 0. 549 */ 550 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 551 { 552 struct sta2x11_vip *vip = video_drvdata(file); 553 554 *i = vip->input; 555 return 0; 556 } 557 558 /** 559 * vidioc_enum_fmt_vid_cap - return video capture format 560 * @f: returned format information 561 * 562 * returns name and format of video capture 563 * Only UYVY is supported by hardware. 564 * 565 * return value: always 0. 566 */ 567 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 568 struct v4l2_fmtdesc *f) 569 { 570 571 if (f->index != 0) 572 return -EINVAL; 573 574 strcpy(f->description, "4:2:2, packed, UYVY"); 575 f->pixelformat = V4L2_PIX_FMT_UYVY; 576 f->flags = 0; 577 return 0; 578 } 579 580 /** 581 * vidioc_try_fmt_vid_cap - set video capture format 582 * @file: descriptor of device 583 * @f: new format 584 * 585 * new video format is set which includes width and 586 * field type. width is fixed to 720, no scaling. 587 * Only UYVY is supported by this hardware. 588 * the minimum height is 200, the maximum is 576 (PAL) 589 * 590 * return value: 0, no error 591 * 592 * -EINVAL, pixel or field format not supported 593 * 594 */ 595 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 596 struct v4l2_format *f) 597 { 598 struct sta2x11_vip *vip = video_drvdata(file); 599 int interlace_lim; 600 601 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { 602 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n"); 603 return -EINVAL; 604 } 605 606 if (V4L2_STD_525_60 & vip->std) 607 interlace_lim = 240; 608 else 609 interlace_lim = 288; 610 611 switch (f->fmt.pix.field) { 612 default: 613 case V4L2_FIELD_ANY: 614 if (interlace_lim < f->fmt.pix.height) 615 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 616 else 617 f->fmt.pix.field = V4L2_FIELD_BOTTOM; 618 break; 619 case V4L2_FIELD_TOP: 620 case V4L2_FIELD_BOTTOM: 621 if (interlace_lim < f->fmt.pix.height) 622 f->fmt.pix.height = interlace_lim; 623 break; 624 case V4L2_FIELD_INTERLACED: 625 break; 626 } 627 628 /* It is the only supported format */ 629 f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; 630 f->fmt.pix.height &= ~1; 631 if (2 * interlace_lim < f->fmt.pix.height) 632 f->fmt.pix.height = 2 * interlace_lim; 633 if (200 > f->fmt.pix.height) 634 f->fmt.pix.height = 200; 635 f->fmt.pix.width = 720; 636 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 637 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; 638 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 639 return 0; 640 } 641 642 /** 643 * vidioc_s_fmt_vid_cap - set current video format parameters 644 * @file: descriptor of device 645 * @f: returned format information 646 * 647 * set new capture format 648 * return value: 0, no error 649 * 650 * other, delivered by video DAC routine. 651 */ 652 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 653 struct v4l2_format *f) 654 { 655 struct sta2x11_vip *vip = video_drvdata(file); 656 unsigned int t_stop, b_stop, pitch; 657 int ret; 658 659 ret = vidioc_try_fmt_vid_cap(file, priv, f); 660 if (ret) 661 return ret; 662 663 if (vb2_is_busy(&vip->vb_vidq)) { 664 /* Can't change format during acquisition */ 665 v4l2_err(&vip->v4l2_dev, "device busy\n"); 666 return -EBUSY; 667 } 668 vip->format = f->fmt.pix; 669 switch (vip->format.field) { 670 case V4L2_FIELD_INTERLACED: 671 t_stop = ((vip->format.height / 2 - 1) << 16) | 672 (2 * vip->format.width - 1); 673 b_stop = t_stop; 674 pitch = 4 * vip->format.width; 675 break; 676 case V4L2_FIELD_TOP: 677 t_stop = ((vip->format.height - 1) << 16) | 678 (2 * vip->format.width - 1); 679 b_stop = (0 << 16) | (2 * vip->format.width - 1); 680 pitch = 2 * vip->format.width; 681 break; 682 case V4L2_FIELD_BOTTOM: 683 t_stop = (0 << 16) | (2 * vip->format.width - 1); 684 b_stop = (vip->format.height << 16) | 685 (2 * vip->format.width - 1); 686 pitch = 2 * vip->format.width; 687 break; 688 default: 689 v4l2_err(&vip->v4l2_dev, "unknown field format\n"); 690 return -EINVAL; 691 } 692 693 spin_lock_irq(&vip->slock); 694 /* Y-X Top Field Offset */ 695 reg_write(vip, DVP_TFO, 0); 696 /* Y-X Bottom Field Offset */ 697 reg_write(vip, DVP_BFO, 0); 698 /* Y-X Top Field Stop*/ 699 reg_write(vip, DVP_TFS, t_stop); 700 /* Y-X Bottom Field Stop */ 701 reg_write(vip, DVP_BFS, b_stop); 702 /* Video Memory Pitch */ 703 reg_write(vip, DVP_VMP, pitch); 704 spin_unlock_irq(&vip->slock); 705 706 return 0; 707 } 708 709 /** 710 * vidioc_g_fmt_vid_cap - get current video format parameters 711 * @file: descriptor of device 712 * @f: contains format information 713 * 714 * returns current video format parameters 715 * 716 * return value: 0, always successful 717 */ 718 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 719 struct v4l2_format *f) 720 { 721 struct sta2x11_vip *vip = video_drvdata(file); 722 723 f->fmt.pix = vip->format; 724 725 return 0; 726 } 727 728 static const struct v4l2_ioctl_ops vip_ioctl_ops = { 729 .vidioc_querycap = vidioc_querycap, 730 /* FMT handling */ 731 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 732 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 733 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 734 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 735 /* Buffer handlers */ 736 .vidioc_create_bufs = vb2_ioctl_create_bufs, 737 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 738 .vidioc_reqbufs = vb2_ioctl_reqbufs, 739 .vidioc_querybuf = vb2_ioctl_querybuf, 740 .vidioc_qbuf = vb2_ioctl_qbuf, 741 .vidioc_dqbuf = vb2_ioctl_dqbuf, 742 /* Stream on/off */ 743 .vidioc_streamon = vb2_ioctl_streamon, 744 .vidioc_streamoff = vb2_ioctl_streamoff, 745 /* Standard handling */ 746 .vidioc_g_std = vidioc_g_std, 747 .vidioc_s_std = vidioc_s_std, 748 .vidioc_querystd = vidioc_querystd, 749 /* Input handling */ 750 .vidioc_enum_input = vidioc_enum_input, 751 .vidioc_g_input = vidioc_g_input, 752 .vidioc_s_input = vidioc_s_input, 753 /* Log status ioctl */ 754 .vidioc_log_status = v4l2_ctrl_log_status, 755 /* Event handling */ 756 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 757 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 758 }; 759 760 static struct video_device video_dev_template = { 761 .name = KBUILD_MODNAME, 762 .release = video_device_release_empty, 763 .fops = &vip_fops, 764 .ioctl_ops = &vip_ioctl_ops, 765 .tvnorms = V4L2_STD_ALL, 766 }; 767 768 /** 769 * vip_irq - interrupt routine 770 * @irq: Number of interrupt ( not used, correct number is assumed ) 771 * @vip: local data structure containing all information 772 * 773 * check for both frame interrupts set ( top and bottom ). 774 * check FIFO overflow, but limit number of log messages after open. 775 * signal a complete buffer if done 776 * 777 * return value: IRQ_NONE, interrupt was not generated by VIP 778 * 779 * IRQ_HANDLED, interrupt done. 780 */ 781 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip) 782 { 783 unsigned int status; 784 785 status = reg_read(vip, DVP_ITS); 786 787 if (!status) /* No interrupt to handle */ 788 return IRQ_NONE; 789 790 if (status & DVP_IT_FIFO) 791 if (vip->overflow++ > 5) 792 pr_info("VIP: fifo overflow\n"); 793 794 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { 795 /* this is bad, we are too slow, hope the condition is gone 796 * on the next frame */ 797 return IRQ_HANDLED; 798 } 799 800 if (status & DVP_IT_VST) 801 if ((++vip->tcount) < 2) 802 return IRQ_HANDLED; 803 if (status & DVP_IT_VSB) { 804 vip->bcount++; 805 return IRQ_HANDLED; 806 } 807 808 if (vip->active) { /* Acquisition is over on this buffer */ 809 /* Disable acquisition */ 810 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 811 /* Remove the active buffer from the list */ 812 vip->active->vb.vb2_buf.timestamp = ktime_get_ns(); 813 vip->active->vb.sequence = vip->sequence++; 814 vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE); 815 } 816 817 return IRQ_HANDLED; 818 } 819 820 static void sta2x11_vip_init_register(struct sta2x11_vip *vip) 821 { 822 /* Register initialization */ 823 spin_lock_irq(&vip->slock); 824 /* Clean interrupt */ 825 reg_read(vip, DVP_ITS); 826 /* Enable Half Line per vertical */ 827 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); 828 /* Reset VIP control */ 829 reg_write(vip, DVP_CTL, DVP_CTL_RST); 830 /* Clear VIP control */ 831 reg_write(vip, DVP_CTL, 0); 832 spin_unlock_irq(&vip->slock); 833 } 834 static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) 835 { 836 spin_lock_irq(&vip->slock); 837 /* Disable interrupt */ 838 reg_write(vip, DVP_ITM, 0); 839 /* Reset VIP Control */ 840 reg_write(vip, DVP_CTL, DVP_CTL_RST); 841 /* Clear VIP Control */ 842 reg_write(vip, DVP_CTL, 0); 843 /* Clean VIP Interrupt */ 844 reg_read(vip, DVP_ITS); 845 spin_unlock_irq(&vip->slock); 846 } 847 static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) 848 { 849 int err; 850 851 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); 852 if (err) { 853 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); 854 return err; 855 } 856 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); 857 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 858 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; 859 vip->vb_vidq.drv_priv = vip; 860 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); 861 vip->vb_vidq.ops = &vip_video_qops; 862 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; 863 vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 864 err = vb2_queue_init(&vip->vb_vidq); 865 if (err) 866 return err; 867 INIT_LIST_HEAD(&vip->buffer_list); 868 spin_lock_init(&vip->lock); 869 870 871 vip->alloc_ctx = vb2_dma_contig_init_ctx(&vip->pdev->dev); 872 if (IS_ERR(vip->alloc_ctx)) { 873 v4l2_err(&vip->v4l2_dev, "Can't allocate buffer context"); 874 return PTR_ERR(vip->alloc_ctx); 875 } 876 877 return 0; 878 } 879 static void sta2x11_vip_release_buffer(struct sta2x11_vip *vip) 880 { 881 vb2_dma_contig_cleanup_ctx(vip->alloc_ctx); 882 } 883 static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) 884 { 885 /* 886 * Inititialize an empty control so VIP can inerithing controls 887 * from ADV7180 888 */ 889 v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); 890 891 vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; 892 if (vip->ctrl_hdl.error) { 893 int err = vip->ctrl_hdl.error; 894 895 v4l2_ctrl_handler_free(&vip->ctrl_hdl); 896 return err; 897 } 898 899 return 0; 900 } 901 902 /** 903 * vip_gpio_reserve - reserve gpio pin 904 * @dev: device 905 * @pin: GPIO pin number 906 * @dir: direction, input or output 907 * @name: GPIO pin name 908 * 909 */ 910 static int vip_gpio_reserve(struct device *dev, int pin, int dir, 911 const char *name) 912 { 913 int ret; 914 915 if (pin == -1) 916 return 0; 917 918 ret = gpio_request(pin, name); 919 if (ret) { 920 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); 921 return ret; 922 } 923 924 ret = gpio_direction_output(pin, dir); 925 if (ret) { 926 dev_err(dev, "Failed to set direction for pin %d (%s)\n", 927 pin, name); 928 gpio_free(pin); 929 return ret; 930 } 931 932 ret = gpio_export(pin, false); 933 if (ret) { 934 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); 935 gpio_free(pin); 936 return ret; 937 } 938 939 return 0; 940 } 941 942 /** 943 * vip_gpio_release - release gpio pin 944 * @dev: device 945 * @pin: GPIO pin number 946 * @name: GPIO pin name 947 * 948 */ 949 static void vip_gpio_release(struct device *dev, int pin, const char *name) 950 { 951 if (pin != -1) { 952 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); 953 gpio_unexport(pin); 954 gpio_free(pin); 955 } 956 } 957 958 /** 959 * sta2x11_vip_init_one - init one instance of video device 960 * @pdev: PCI device 961 * @ent: (not used) 962 * 963 * allocate reset pins for DAC. 964 * Reset video DAC, this is done via reset line. 965 * allocate memory for managing device 966 * request interrupt 967 * map IO region 968 * register device 969 * find and initialize video DAC 970 * 971 * return value: 0, no error 972 * 973 * -ENOMEM, no memory 974 * 975 * -ENODEV, device could not be detected or registered 976 */ 977 static int sta2x11_vip_init_one(struct pci_dev *pdev, 978 const struct pci_device_id *ent) 979 { 980 int ret; 981 struct sta2x11_vip *vip; 982 struct vip_config *config; 983 984 /* Check if hardware support 26-bit DMA */ 985 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { 986 dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); 987 return -EINVAL; 988 } 989 /* Enable PCI */ 990 ret = pci_enable_device(pdev); 991 if (ret) 992 return ret; 993 994 /* Get VIP platform data */ 995 config = dev_get_platdata(&pdev->dev); 996 if (!config) { 997 dev_info(&pdev->dev, "VIP slot disabled\n"); 998 ret = -EINVAL; 999 goto disable; 1000 } 1001 1002 /* Power configuration */ 1003 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, 1004 config->pwr_name); 1005 if (ret) 1006 goto disable; 1007 1008 if (config->reset_pin >= 0) { 1009 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, 1010 config->reset_name); 1011 if (ret) { 1012 vip_gpio_release(&pdev->dev, config->pwr_pin, 1013 config->pwr_name); 1014 goto disable; 1015 } 1016 } 1017 if (config->pwr_pin != -1) { 1018 /* Datasheet says 5ms between PWR and RST */ 1019 usleep_range(5000, 25000); 1020 ret = gpio_direction_output(config->pwr_pin, 1); 1021 } 1022 1023 if (config->reset_pin != -1) { 1024 /* Datasheet says 5ms between PWR and RST */ 1025 usleep_range(5000, 25000); 1026 ret = gpio_direction_output(config->reset_pin, 1); 1027 } 1028 usleep_range(5000, 25000); 1029 1030 /* Allocate a new VIP instance */ 1031 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); 1032 if (!vip) { 1033 ret = -ENOMEM; 1034 goto release_gpios; 1035 } 1036 vip->pdev = pdev; 1037 vip->std = V4L2_STD_PAL; 1038 vip->format = formats_50[0]; 1039 vip->config = config; 1040 1041 ret = sta2x11_vip_init_controls(vip); 1042 if (ret) 1043 goto free_mem; 1044 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); 1045 if (ret) 1046 goto free_mem; 1047 1048 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", 1049 (unsigned long)pci_resource_start(pdev, 0), 1050 (unsigned long)pci_resource_len(pdev, 0), pdev->irq); 1051 1052 pci_set_master(pdev); 1053 1054 ret = pci_request_regions(pdev, KBUILD_MODNAME); 1055 if (ret) 1056 goto unreg; 1057 1058 vip->iomem = pci_iomap(pdev, 0, 0x100); 1059 if (!vip->iomem) { 1060 ret = -ENOMEM; 1061 goto release; 1062 } 1063 1064 pci_enable_msi(pdev); 1065 1066 /* Initialize buffer */ 1067 ret = sta2x11_vip_init_buffer(vip); 1068 if (ret) 1069 goto unmap; 1070 1071 spin_lock_init(&vip->slock); 1072 1073 ret = request_irq(pdev->irq, 1074 (irq_handler_t) vip_irq, 1075 IRQF_SHARED, KBUILD_MODNAME, vip); 1076 if (ret) { 1077 dev_err(&pdev->dev, "request_irq failed\n"); 1078 ret = -ENODEV; 1079 goto release_buf; 1080 } 1081 1082 /* Initialize and register video device */ 1083 vip->video_dev = video_dev_template; 1084 vip->video_dev.v4l2_dev = &vip->v4l2_dev; 1085 vip->video_dev.queue = &vip->vb_vidq; 1086 video_set_drvdata(&vip->video_dev, vip); 1087 1088 ret = video_register_device(&vip->video_dev, VFL_TYPE_GRABBER, -1); 1089 if (ret) 1090 goto vrelease; 1091 1092 /* Get ADV7180 subdevice */ 1093 vip->adapter = i2c_get_adapter(vip->config->i2c_id); 1094 if (!vip->adapter) { 1095 ret = -ENODEV; 1096 dev_err(&pdev->dev, "no I2C adapter found\n"); 1097 goto vunreg; 1098 } 1099 1100 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, 1101 "adv7180", vip->config->i2c_addr, 1102 NULL); 1103 if (!vip->decoder) { 1104 ret = -ENODEV; 1105 dev_err(&pdev->dev, "no decoder found\n"); 1106 goto vunreg; 1107 } 1108 1109 i2c_put_adapter(vip->adapter); 1110 v4l2_subdev_call(vip->decoder, core, init, 0); 1111 1112 sta2x11_vip_init_register(vip); 1113 1114 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); 1115 return 0; 1116 1117 vunreg: 1118 video_set_drvdata(&vip->video_dev, NULL); 1119 vrelease: 1120 video_unregister_device(&vip->video_dev); 1121 free_irq(pdev->irq, vip); 1122 release_buf: 1123 sta2x11_vip_release_buffer(vip); 1124 pci_disable_msi(pdev); 1125 unmap: 1126 vb2_queue_release(&vip->vb_vidq); 1127 pci_iounmap(pdev, vip->iomem); 1128 release: 1129 pci_release_regions(pdev); 1130 unreg: 1131 v4l2_device_unregister(&vip->v4l2_dev); 1132 free_mem: 1133 kfree(vip); 1134 release_gpios: 1135 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); 1136 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); 1137 disable: 1138 /* 1139 * do not call pci_disable_device on sta2x11 because it break all 1140 * other Bus masters on this EP 1141 */ 1142 return ret; 1143 } 1144 1145 /** 1146 * sta2x11_vip_remove_one - release device 1147 * @pdev: PCI device 1148 * 1149 * Undo everything done in .._init_one 1150 * 1151 * unregister video device 1152 * free interrupt 1153 * unmap ioadresses 1154 * free memory 1155 * free GPIO pins 1156 */ 1157 static void sta2x11_vip_remove_one(struct pci_dev *pdev) 1158 { 1159 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1160 struct sta2x11_vip *vip = 1161 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1162 1163 sta2x11_vip_clear_register(vip); 1164 1165 video_set_drvdata(&vip->video_dev, NULL); 1166 video_unregister_device(&vip->video_dev); 1167 free_irq(pdev->irq, vip); 1168 pci_disable_msi(pdev); 1169 vb2_queue_release(&vip->vb_vidq); 1170 pci_iounmap(pdev, vip->iomem); 1171 pci_release_regions(pdev); 1172 1173 v4l2_device_unregister(&vip->v4l2_dev); 1174 1175 vip_gpio_release(&pdev->dev, vip->config->pwr_pin, 1176 vip->config->pwr_name); 1177 vip_gpio_release(&pdev->dev, vip->config->reset_pin, 1178 vip->config->reset_name); 1179 1180 kfree(vip); 1181 /* 1182 * do not call pci_disable_device on sta2x11 because it break all 1183 * other Bus masters on this EP 1184 */ 1185 } 1186 1187 #ifdef CONFIG_PM 1188 1189 /** 1190 * sta2x11_vip_suspend - set device into power save mode 1191 * @pdev: PCI device 1192 * @state: new state of device 1193 * 1194 * all relevant registers are saved and an attempt to set a new state is made. 1195 * 1196 * return value: 0 always indicate success, 1197 * even if device could not be disabled. (workaround for hardware problem) 1198 */ 1199 static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state) 1200 { 1201 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1202 struct sta2x11_vip *vip = 1203 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1204 unsigned long flags; 1205 int i; 1206 1207 spin_lock_irqsave(&vip->slock, flags); 1208 vip->register_save_area[0] = reg_read(vip, DVP_CTL); 1209 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); 1210 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); 1211 reg_write(vip, DVP_ITM, 0); 1212 for (i = 1; i < SAVE_COUNT; i++) 1213 vip->register_save_area[i] = reg_read(vip, 4 * i); 1214 for (i = 0; i < AUX_COUNT; i++) 1215 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = 1216 reg_read(vip, registers_to_save[i]); 1217 spin_unlock_irqrestore(&vip->slock, flags); 1218 /* save pci state */ 1219 pci_save_state(pdev); 1220 if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) { 1221 /* 1222 * do not call pci_disable_device on sta2x11 because it 1223 * break all other Bus masters on this EP 1224 */ 1225 vip->disabled = 1; 1226 } 1227 1228 pr_info("VIP: suspend\n"); 1229 return 0; 1230 } 1231 1232 /** 1233 * sta2x11_vip_resume - resume device operation 1234 * @pdev : PCI device 1235 * 1236 * re-enable device, set PCI state to powered and restore registers. 1237 * resume normal device operation afterwards. 1238 * 1239 * return value: 0, no error. 1240 * 1241 * other, could not set device to power on state. 1242 */ 1243 static int sta2x11_vip_resume(struct pci_dev *pdev) 1244 { 1245 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1246 struct sta2x11_vip *vip = 1247 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1248 unsigned long flags; 1249 int ret, i; 1250 1251 pr_info("VIP: resume\n"); 1252 /* restore pci state */ 1253 if (vip->disabled) { 1254 ret = pci_enable_device(pdev); 1255 if (ret) { 1256 pr_warn("VIP: Can't enable device.\n"); 1257 return ret; 1258 } 1259 vip->disabled = 0; 1260 } 1261 ret = pci_set_power_state(pdev, PCI_D0); 1262 if (ret) { 1263 /* 1264 * do not call pci_disable_device on sta2x11 because it 1265 * break all other Bus masters on this EP 1266 */ 1267 pr_warn("VIP: Can't enable device.\n"); 1268 vip->disabled = 1; 1269 return ret; 1270 } 1271 1272 pci_restore_state(pdev); 1273 1274 spin_lock_irqsave(&vip->slock, flags); 1275 for (i = 1; i < SAVE_COUNT; i++) 1276 reg_write(vip, 4 * i, vip->register_save_area[i]); 1277 for (i = 0; i < AUX_COUNT; i++) 1278 reg_write(vip, registers_to_save[i], 1279 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); 1280 reg_write(vip, DVP_CTL, vip->register_save_area[0]); 1281 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); 1282 spin_unlock_irqrestore(&vip->slock, flags); 1283 return 0; 1284 } 1285 1286 #endif 1287 1288 static const struct pci_device_id sta2x11_vip_pci_tbl[] = { 1289 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, 1290 {0,} 1291 }; 1292 1293 static struct pci_driver sta2x11_vip_driver = { 1294 .name = KBUILD_MODNAME, 1295 .probe = sta2x11_vip_init_one, 1296 .remove = sta2x11_vip_remove_one, 1297 .id_table = sta2x11_vip_pci_tbl, 1298 #ifdef CONFIG_PM 1299 .suspend = sta2x11_vip_suspend, 1300 .resume = sta2x11_vip_resume, 1301 #endif 1302 }; 1303 1304 static int __init sta2x11_vip_init_module(void) 1305 { 1306 return pci_register_driver(&sta2x11_vip_driver); 1307 } 1308 1309 static void __exit sta2x11_vip_exit_module(void) 1310 { 1311 pci_unregister_driver(&sta2x11_vip_driver); 1312 } 1313 1314 #ifdef MODULE 1315 module_init(sta2x11_vip_init_module); 1316 module_exit(sta2x11_vip_exit_module); 1317 #else 1318 late_initcall_sync(sta2x11_vip_init_module); 1319 #endif 1320 1321 MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); 1322 MODULE_AUTHOR("Wind River"); 1323 MODULE_LICENSE("GPL v2"); 1324 MODULE_SUPPORTED_DEVICE("sta2x11 video input"); 1325 MODULE_VERSION(DRV_VERSION); 1326 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); 1327