sta2x11_vip.c revision d017650b40b4cb5c4158e3b9af38af164986b022
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 90struct vip_buffer { 91 struct vb2_buffer vb; 92 struct list_head list; 93 dma_addr_t dma; 94}; 95static inline struct vip_buffer *to_vip_buffer(struct vb2_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 */ 128struct 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; /* I/O Memory */ 156 struct vip_config *config; 157}; 158 159static const unsigned int registers_to_save[AUX_COUNT] = { 160 DVP_HLFLN, DVP_RGB, DVP_PKZ 161}; 162 163static 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 191static 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 */ 219static 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 */ 224static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg) 225{ 226 return ioread32((vip->iomem)+(reg)); 227} 228/* Start DMA acquisition */ 229static 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 */ 246static 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 */ 268static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, 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}; 288static int buffer_init(struct vb2_buffer *vb) 289{ 290 struct vip_buffer *vip_buf = to_vip_buffer(vb); 291 292 vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, 0); 293 INIT_LIST_HEAD(&vip_buf->list); 294 return 0; 295} 296 297static int buffer_prepare(struct vb2_buffer *vb) 298{ 299 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 300 struct vip_buffer *vip_buf = to_vip_buffer(vb); 301 unsigned long size; 302 303 size = vip->format.sizeimage; 304 if (vb2_plane_size(vb, 0) < size) { 305 v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n", 306 vb2_plane_size(vb, 0), size); 307 return -EINVAL; 308 } 309 310 vb2_set_plane_payload(&vip_buf->vb, 0, size); 311 312 return 0; 313} 314static void buffer_queue(struct vb2_buffer *vb) 315{ 316 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 317 struct vip_buffer *vip_buf = to_vip_buffer(vb); 318 319 spin_lock(&vip->lock); 320 list_add_tail(&vip_buf->list, &vip->buffer_list); 321 if (!vip->active) { /* No active buffer, active the first one */ 322 vip->active = list_first_entry(&vip->buffer_list, 323 struct vip_buffer, 324 list); 325 if (vb2_is_streaming(&vip->vb_vidq)) /* streaming is on */ 326 start_dma(vip, vip_buf); /* start dma capture */ 327 } 328 spin_unlock(&vip->lock); 329} 330static int buffer_finish(struct vb2_buffer *vb) 331{ 332 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 333 struct vip_buffer *vip_buf = to_vip_buffer(vb); 334 335 /* Buffer handled, remove it from the list */ 336 spin_lock(&vip->lock); 337 list_del_init(&vip_buf->list); 338 spin_unlock(&vip->lock); 339 340 vip_active_buf_next(vip); 341 342 return 0; 343} 344 345static int start_streaming(struct vb2_queue *vq, unsigned int count) 346{ 347 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 348 349 spin_lock_irq(&vip->slock); 350 /* Enable interrupt VSYNC Top and Bottom*/ 351 reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST); 352 spin_unlock_irq(&vip->slock); 353 354 if (count) 355 start_dma(vip, vip->active); 356 357 return 0; 358} 359 360/* abort streaming and wait for last buffer */ 361static int stop_streaming(struct vb2_queue *vq) 362{ 363 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 364 struct vip_buffer *vip_buf, *node; 365 366 /* Disable acquisition */ 367 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 368 /* Disable all interrupts */ 369 reg_write(vip, DVP_ITM, 0); 370 371 /* Release all active buffers */ 372 spin_lock(&vip->lock); 373 list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) { 374 vb2_buffer_done(&vip_buf->vb, VB2_BUF_STATE_ERROR); 375 list_del(&vip_buf->list); 376 } 377 spin_unlock(&vip->lock); 378 return 0; 379} 380 381static struct vb2_ops vip_video_qops = { 382 .queue_setup = queue_setup, 383 .buf_init = buffer_init, 384 .buf_prepare = buffer_prepare, 385 .buf_finish = buffer_finish, 386 .buf_queue = buffer_queue, 387 .start_streaming = start_streaming, 388 .stop_streaming = stop_streaming, 389}; 390 391 392/* File Operations */ 393static const struct v4l2_file_operations vip_fops = { 394 .owner = THIS_MODULE, 395 .open = v4l2_fh_open, 396 .release = vb2_fop_release, 397 .unlocked_ioctl = video_ioctl2, 398 .read = vb2_fop_read, 399 .mmap = vb2_fop_mmap, 400 .poll = vb2_fop_poll 401}; 402 403 404/** 405 * vidioc_querycap - return capabilities of device 406 * @file: descriptor of device 407 * @cap: contains return values 408 * 409 * the capabilities of the device are returned 410 * 411 * return value: 0, no error. 412 */ 413static int vidioc_querycap(struct file *file, void *priv, 414 struct v4l2_capability *cap) 415{ 416 struct sta2x11_vip *vip = video_drvdata(file); 417 418 strcpy(cap->driver, KBUILD_MODNAME); 419 strcpy(cap->card, KBUILD_MODNAME); 420 snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s", 421 pci_name(vip->pdev)); 422 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 423 V4L2_CAP_STREAMING; 424 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 425 426 return 0; 427} 428 429/** 430 * vidioc_s_std - set video standard 431 * @file: descriptor of device 432 * @std: contains standard to be set 433 * 434 * the video standard is set 435 * 436 * return value: 0, no error. 437 * 438 * -EIO, no input signal detected 439 * 440 * other, returned from video DAC. 441 */ 442static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) 443{ 444 struct sta2x11_vip *vip = video_drvdata(file); 445 v4l2_std_id oldstd = vip->std, newstd; 446 int status; 447 448 if (V4L2_STD_ALL == std) { 449 v4l2_subdev_call(vip->decoder, core, s_std, std); 450 ssleep(2); 451 v4l2_subdev_call(vip->decoder, video, querystd, &newstd); 452 v4l2_subdev_call(vip->decoder, video, g_input_status, &status); 453 if (status & V4L2_IN_ST_NO_SIGNAL) 454 return -EIO; 455 std = vip->std = newstd; 456 if (oldstd != std) { 457 if (V4L2_STD_525_60 & std) 458 vip->format = formats_60[0]; 459 else 460 vip->format = formats_50[0]; 461 } 462 return 0; 463 } 464 465 if (oldstd != std) { 466 if (V4L2_STD_525_60 & std) 467 vip->format = formats_60[0]; 468 else 469 vip->format = formats_50[0]; 470 } 471 472 return v4l2_subdev_call(vip->decoder, core, s_std, std); 473} 474 475/** 476 * vidioc_g_std - get video standard 477 * @file: descriptor of device 478 * @std: contains return values 479 * 480 * the current video standard is returned 481 * 482 * return value: 0, no error. 483 */ 484static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) 485{ 486 struct sta2x11_vip *vip = video_drvdata(file); 487 488 *std = vip->std; 489 return 0; 490} 491 492/** 493 * vidioc_querystd - get possible video standards 494 * @file: descriptor of device 495 * @std: contains return values 496 * 497 * all possible video standards are returned 498 * 499 * return value: delivered by video DAC routine. 500 */ 501static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) 502{ 503 struct sta2x11_vip *vip = video_drvdata(file); 504 505 return v4l2_subdev_call(vip->decoder, video, querystd, std); 506} 507 508static int vidioc_enum_input(struct file *file, void *priv, 509 struct v4l2_input *inp) 510{ 511 if (inp->index > 1) 512 return -EINVAL; 513 514 inp->type = V4L2_INPUT_TYPE_CAMERA; 515 inp->std = V4L2_STD_ALL; 516 sprintf(inp->name, "Camera %u", inp->index); 517 518 return 0; 519} 520 521/** 522 * vidioc_s_input - set input line 523 * @file: descriptor of device 524 * @i: new input line number 525 * 526 * the current active input line is set 527 * 528 * return value: 0, no error. 529 * 530 * -EINVAL, line number out of range 531 */ 532static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 533{ 534 struct sta2x11_vip *vip = video_drvdata(file); 535 int ret; 536 537 if (i > 1) 538 return -EINVAL; 539 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); 540 541 if (!ret) 542 vip->input = i; 543 544 return 0; 545} 546 547/** 548 * vidioc_g_input - return input line 549 * @file: descriptor of device 550 * @i: returned input line number 551 * 552 * the current active input line is returned 553 * 554 * return value: always 0. 555 */ 556static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 557{ 558 struct sta2x11_vip *vip = video_drvdata(file); 559 560 *i = vip->input; 561 return 0; 562} 563 564/** 565 * vidioc_enum_fmt_vid_cap - return video capture format 566 * @f: returned format information 567 * 568 * returns name and format of video capture 569 * Only UYVY is supported by hardware. 570 * 571 * return value: always 0. 572 */ 573static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 574 struct v4l2_fmtdesc *f) 575{ 576 577 if (f->index != 0) 578 return -EINVAL; 579 580 strcpy(f->description, "4:2:2, packed, UYVY"); 581 f->pixelformat = V4L2_PIX_FMT_UYVY; 582 f->flags = 0; 583 return 0; 584} 585 586/** 587 * vidioc_try_fmt_vid_cap - set video capture format 588 * @file: descriptor of device 589 * @f: new format 590 * 591 * new video format is set which includes width and 592 * field type. width is fixed to 720, no scaling. 593 * Only UYVY is supported by this hardware. 594 * the minimum height is 200, the maximum is 576 (PAL) 595 * 596 * return value: 0, no error 597 * 598 * -EINVAL, pixel or field format not supported 599 * 600 */ 601static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 602 struct v4l2_format *f) 603{ 604 struct sta2x11_vip *vip = video_drvdata(file); 605 int interlace_lim; 606 607 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { 608 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n"); 609 return -EINVAL; 610 } 611 612 if (V4L2_STD_525_60 & vip->std) 613 interlace_lim = 240; 614 else 615 interlace_lim = 288; 616 617 switch (f->fmt.pix.field) { 618 default: 619 case V4L2_FIELD_ANY: 620 if (interlace_lim < f->fmt.pix.height) 621 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 622 else 623 f->fmt.pix.field = V4L2_FIELD_BOTTOM; 624 break; 625 case V4L2_FIELD_TOP: 626 case V4L2_FIELD_BOTTOM: 627 if (interlace_lim < f->fmt.pix.height) 628 f->fmt.pix.height = interlace_lim; 629 break; 630 case V4L2_FIELD_INTERLACED: 631 break; 632 } 633 634 /* It is the only supported format */ 635 f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; 636 f->fmt.pix.height &= ~1; 637 if (2 * interlace_lim < f->fmt.pix.height) 638 f->fmt.pix.height = 2 * interlace_lim; 639 if (200 > f->fmt.pix.height) 640 f->fmt.pix.height = 200; 641 f->fmt.pix.width = 720; 642 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 643 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; 644 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 645 f->fmt.pix.priv = 0; 646 return 0; 647} 648 649/** 650 * vidioc_s_fmt_vid_cap - set current video format parameters 651 * @file: descriptor of device 652 * @f: returned format information 653 * 654 * set new capture format 655 * return value: 0, no error 656 * 657 * other, delivered by video DAC routine. 658 */ 659static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 660 struct v4l2_format *f) 661{ 662 struct sta2x11_vip *vip = video_drvdata(file); 663 unsigned int t_stop, b_stop, pitch; 664 int ret; 665 666 ret = vidioc_try_fmt_vid_cap(file, priv, f); 667 if (ret) 668 return ret; 669 670 if (vb2_is_busy(&vip->vb_vidq)) { 671 /* Can't change format during acquisition */ 672 v4l2_err(&vip->v4l2_dev, "device busy\n"); 673 return -EBUSY; 674 } 675 vip->format = f->fmt.pix; 676 switch (vip->format.field) { 677 case V4L2_FIELD_INTERLACED: 678 t_stop = ((vip->format.height / 2 - 1) << 16) | 679 (2 * vip->format.width - 1); 680 b_stop = t_stop; 681 pitch = 4 * vip->format.width; 682 break; 683 case V4L2_FIELD_TOP: 684 t_stop = ((vip->format.height - 1) << 16) | 685 (2 * vip->format.width - 1); 686 b_stop = (0 << 16) | (2 * vip->format.width - 1); 687 pitch = 2 * vip->format.width; 688 break; 689 case V4L2_FIELD_BOTTOM: 690 t_stop = (0 << 16) | (2 * vip->format.width - 1); 691 b_stop = (vip->format.height << 16) | 692 (2 * vip->format.width - 1); 693 pitch = 2 * vip->format.width; 694 break; 695 default: 696 v4l2_err(&vip->v4l2_dev, "unknown field format\n"); 697 return -EINVAL; 698 } 699 700 spin_lock_irq(&vip->slock); 701 /* Y-X Top Field Offset */ 702 reg_write(vip, DVP_TFO, 0); 703 /* Y-X Bottom Field Offset */ 704 reg_write(vip, DVP_BFO, 0); 705 /* Y-X Top Field Stop*/ 706 reg_write(vip, DVP_TFS, t_stop); 707 /* Y-X Bottom Field Stop */ 708 reg_write(vip, DVP_BFS, b_stop); 709 /* Video Memory Pitch */ 710 reg_write(vip, DVP_VMP, pitch); 711 spin_unlock_irq(&vip->slock); 712 713 return 0; 714} 715 716/** 717 * vidioc_g_fmt_vid_cap - get current video format parameters 718 * @file: descriptor of device 719 * @f: contains format information 720 * 721 * returns current video format parameters 722 * 723 * return value: 0, always successful 724 */ 725static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 726 struct v4l2_format *f) 727{ 728 struct sta2x11_vip *vip = video_drvdata(file); 729 730 f->fmt.pix = vip->format; 731 732 return 0; 733} 734 735static const struct v4l2_ioctl_ops vip_ioctl_ops = { 736 .vidioc_querycap = vidioc_querycap, 737 /* FMT handling */ 738 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 739 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 740 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 741 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 742 /* Buffer handlers */ 743 .vidioc_create_bufs = vb2_ioctl_create_bufs, 744 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 745 .vidioc_reqbufs = vb2_ioctl_reqbufs, 746 .vidioc_querybuf = vb2_ioctl_querybuf, 747 .vidioc_qbuf = vb2_ioctl_qbuf, 748 .vidioc_dqbuf = vb2_ioctl_dqbuf, 749 /* Stream on/off */ 750 .vidioc_streamon = vb2_ioctl_streamon, 751 .vidioc_streamoff = vb2_ioctl_streamoff, 752 /* Standard handling */ 753 .vidioc_g_std = vidioc_g_std, 754 .vidioc_s_std = vidioc_s_std, 755 .vidioc_querystd = vidioc_querystd, 756 /* Input handling */ 757 .vidioc_enum_input = vidioc_enum_input, 758 .vidioc_g_input = vidioc_g_input, 759 .vidioc_s_input = vidioc_s_input, 760 /* Log status ioctl */ 761 .vidioc_log_status = v4l2_ctrl_log_status, 762 /* Event handling */ 763 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 764 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 765}; 766 767static struct video_device video_dev_template = { 768 .name = KBUILD_MODNAME, 769 .release = video_device_release, 770 .fops = &vip_fops, 771 .ioctl_ops = &vip_ioctl_ops, 772 .tvnorms = V4L2_STD_ALL, 773}; 774 775/** 776 * vip_irq - interrupt routine 777 * @irq: Number of interrupt ( not used, correct number is assumed ) 778 * @vip: local data structure containing all information 779 * 780 * check for both frame interrupts set ( top and bottom ). 781 * check FIFO overflow, but limit number of log messages after open. 782 * signal a complete buffer if done 783 * 784 * return value: IRQ_NONE, interrupt was not generated by VIP 785 * 786 * IRQ_HANDLED, interrupt done. 787 */ 788static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip) 789{ 790 unsigned int status; 791 792 status = reg_read(vip, DVP_ITS); 793 794 if (!status) /* No interrupt to handle */ 795 return IRQ_NONE; 796 797 if (status & DVP_IT_FIFO) 798 if (vip->overflow++ > 5) 799 pr_info("VIP: fifo overflow\n"); 800 801 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { 802 /* this is bad, we are too slow, hope the condition is gone 803 * on the next frame */ 804 return IRQ_HANDLED; 805 } 806 807 if (status & DVP_IT_VST) 808 if ((++vip->tcount) < 2) 809 return IRQ_HANDLED; 810 if (status & DVP_IT_VSB) { 811 vip->bcount++; 812 return IRQ_HANDLED; 813 } 814 815 if (vip->active) { /* Acquisition is over on this buffer */ 816 /* Disable acquisition */ 817 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 818 /* Remove the active buffer from the list */ 819 do_gettimeofday(&vip->active->vb.v4l2_buf.timestamp); 820 vip->active->vb.v4l2_buf.sequence = vip->sequence++; 821 vb2_buffer_done(&vip->active->vb, VB2_BUF_STATE_DONE); 822 } 823 824 return IRQ_HANDLED; 825} 826 827static void sta2x11_vip_init_register(struct sta2x11_vip *vip) 828{ 829 /* Register initialization */ 830 spin_lock_irq(&vip->slock); 831 /* Clean interrupt */ 832 reg_read(vip, DVP_ITS); 833 /* Enable Half Line per vertical */ 834 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); 835 /* Reset VIP control */ 836 reg_write(vip, DVP_CTL, DVP_CTL_RST); 837 /* Clear VIP control */ 838 reg_write(vip, DVP_CTL, 0); 839 spin_unlock_irq(&vip->slock); 840} 841static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) 842{ 843 spin_lock_irq(&vip->slock); 844 /* Disable interrupt */ 845 reg_write(vip, DVP_ITM, 0); 846 /* Reset VIP Control */ 847 reg_write(vip, DVP_CTL, DVP_CTL_RST); 848 /* Clear VIP Control */ 849 reg_write(vip, DVP_CTL, 0); 850 /* Clean VIP Interrupt */ 851 reg_read(vip, DVP_ITS); 852 spin_unlock_irq(&vip->slock); 853} 854static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) 855{ 856 int err; 857 858 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); 859 if (err) { 860 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); 861 return err; 862 } 863 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); 864 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 865 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; 866 vip->vb_vidq.drv_priv = vip; 867 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); 868 vip->vb_vidq.ops = &vip_video_qops; 869 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; 870 err = vb2_queue_init(&vip->vb_vidq); 871 if (err) 872 return err; 873 INIT_LIST_HEAD(&vip->buffer_list); 874 spin_lock_init(&vip->lock); 875 876 877 vip->alloc_ctx = vb2_dma_contig_init_ctx(&vip->pdev->dev); 878 if (IS_ERR(vip->alloc_ctx)) { 879 v4l2_err(&vip->v4l2_dev, "Can't allocate buffer context"); 880 return PTR_ERR(vip->alloc_ctx); 881 } 882 883 return 0; 884} 885static void sta2x11_vip_release_buffer(struct sta2x11_vip *vip) 886{ 887 vb2_dma_contig_cleanup_ctx(vip->alloc_ctx); 888} 889static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) 890{ 891 /* 892 * Inititialize an empty control so VIP can inerithing controls 893 * from ADV7180 894 */ 895 v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); 896 897 vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; 898 if (vip->ctrl_hdl.error) { 899 int err = vip->ctrl_hdl.error; 900 901 v4l2_ctrl_handler_free(&vip->ctrl_hdl); 902 return err; 903 } 904 905 return 0; 906} 907 908/** 909 * vip_gpio_reserve - reserve gpio pin 910 * @dev: device 911 * @pin: GPIO pin number 912 * @dir: direction, input or output 913 * @name: GPIO pin name 914 * 915 */ 916static int vip_gpio_reserve(struct device *dev, int pin, int dir, 917 const char *name) 918{ 919 int ret; 920 921 if (pin == -1) 922 return 0; 923 924 ret = gpio_request(pin, name); 925 if (ret) { 926 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); 927 return ret; 928 } 929 930 ret = gpio_direction_output(pin, dir); 931 if (ret) { 932 dev_err(dev, "Failed to set direction for pin %d (%s)\n", 933 pin, name); 934 gpio_free(pin); 935 return ret; 936 } 937 938 ret = gpio_export(pin, false); 939 if (ret) { 940 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); 941 gpio_free(pin); 942 return ret; 943 } 944 945 return 0; 946} 947 948/** 949 * vip_gpio_release - release gpio pin 950 * @dev: device 951 * @pin: GPIO pin number 952 * @name: GPIO pin name 953 * 954 */ 955static void vip_gpio_release(struct device *dev, int pin, const char *name) 956{ 957 if (pin != -1) { 958 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); 959 gpio_unexport(pin); 960 gpio_free(pin); 961 } 962} 963 964/** 965 * sta2x11_vip_init_one - init one instance of video device 966 * @pdev: PCI device 967 * @ent: (not used) 968 * 969 * allocate reset pins for DAC. 970 * Reset video DAC, this is done via reset line. 971 * allocate memory for managing device 972 * request interrupt 973 * map IO region 974 * register device 975 * find and initialize video DAC 976 * 977 * return value: 0, no error 978 * 979 * -ENOMEM, no memory 980 * 981 * -ENODEV, device could not be detected or registered 982 */ 983static int sta2x11_vip_init_one(struct pci_dev *pdev, 984 const struct pci_device_id *ent) 985{ 986 int ret; 987 struct sta2x11_vip *vip; 988 struct vip_config *config; 989 990 /* Check if hardware support 26-bit DMA */ 991 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { 992 dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); 993 return -EINVAL; 994 } 995 /* Enable PCI */ 996 ret = pci_enable_device(pdev); 997 if (ret) 998 return ret; 999 1000 /* Get VIP platform data */ 1001 config = dev_get_platdata(&pdev->dev); 1002 if (!config) { 1003 dev_info(&pdev->dev, "VIP slot disabled\n"); 1004 ret = -EINVAL; 1005 goto disable; 1006 } 1007 1008 /* Power configuration */ 1009 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, 1010 config->pwr_name); 1011 if (ret) 1012 goto disable; 1013 1014 if (config->reset_pin >= 0) { 1015 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, 1016 config->reset_name); 1017 if (ret) { 1018 vip_gpio_release(&pdev->dev, config->pwr_pin, 1019 config->pwr_name); 1020 goto disable; 1021 } 1022 } 1023 if (config->pwr_pin != -1) { 1024 /* Datasheet says 5ms between PWR and RST */ 1025 usleep_range(5000, 25000); 1026 ret = gpio_direction_output(config->pwr_pin, 1); 1027 } 1028 1029 if (config->reset_pin != -1) { 1030 /* Datasheet says 5ms between PWR and RST */ 1031 usleep_range(5000, 25000); 1032 ret = gpio_direction_output(config->reset_pin, 1); 1033 } 1034 usleep_range(5000, 25000); 1035 1036 /* Allocate a new VIP instance */ 1037 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); 1038 if (!vip) { 1039 ret = -ENOMEM; 1040 goto release_gpios; 1041 } 1042 vip->pdev = pdev; 1043 vip->std = V4L2_STD_PAL; 1044 vip->format = formats_50[0]; 1045 vip->config = config; 1046 1047 ret = sta2x11_vip_init_controls(vip); 1048 if (ret) 1049 goto free_mem; 1050 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); 1051 if (ret) 1052 goto free_mem; 1053 1054 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", 1055 (unsigned long)pci_resource_start(pdev, 0), 1056 (unsigned long)pci_resource_len(pdev, 0), pdev->irq); 1057 1058 pci_set_master(pdev); 1059 1060 ret = pci_request_regions(pdev, KBUILD_MODNAME); 1061 if (ret) 1062 goto unreg; 1063 1064 vip->iomem = pci_iomap(pdev, 0, 0x100); 1065 if (!vip->iomem) { 1066 ret = -ENOMEM; 1067 goto release; 1068 } 1069 1070 pci_enable_msi(pdev); 1071 1072 /* Initialize buffer */ 1073 ret = sta2x11_vip_init_buffer(vip); 1074 if (ret) 1075 goto unmap; 1076 1077 spin_lock_init(&vip->slock); 1078 1079 ret = request_irq(pdev->irq, 1080 (irq_handler_t) vip_irq, 1081 IRQF_SHARED, KBUILD_MODNAME, vip); 1082 if (ret) { 1083 dev_err(&pdev->dev, "request_irq failed\n"); 1084 ret = -ENODEV; 1085 goto release_buf; 1086 } 1087 1088 /* Alloc, initialize and register video device */ 1089 vip->video_dev = video_device_alloc(); 1090 if (!vip->video_dev) { 1091 ret = -ENOMEM; 1092 goto release_irq; 1093 } 1094 1095 vip->video_dev = &video_dev_template; 1096 vip->video_dev->v4l2_dev = &vip->v4l2_dev; 1097 vip->video_dev->queue = &vip->vb_vidq; 1098 set_bit(V4L2_FL_USE_FH_PRIO, &vip->video_dev->flags); 1099 video_set_drvdata(vip->video_dev, vip); 1100 1101 ret = video_register_device(vip->video_dev, VFL_TYPE_GRABBER, -1); 1102 if (ret) 1103 goto vrelease; 1104 1105 /* Get ADV7180 subdevice */ 1106 vip->adapter = i2c_get_adapter(vip->config->i2c_id); 1107 if (!vip->adapter) { 1108 ret = -ENODEV; 1109 dev_err(&pdev->dev, "no I2C adapter found\n"); 1110 goto vunreg; 1111 } 1112 1113 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, 1114 "adv7180", vip->config->i2c_addr, 1115 NULL); 1116 if (!vip->decoder) { 1117 ret = -ENODEV; 1118 dev_err(&pdev->dev, "no decoder found\n"); 1119 goto vunreg; 1120 } 1121 1122 i2c_put_adapter(vip->adapter); 1123 v4l2_subdev_call(vip->decoder, core, init, 0); 1124 1125 sta2x11_vip_init_register(vip); 1126 1127 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); 1128 return 0; 1129 1130vunreg: 1131 video_set_drvdata(vip->video_dev, NULL); 1132vrelease: 1133 if (video_is_registered(vip->video_dev)) 1134 video_unregister_device(vip->video_dev); 1135 else 1136 video_device_release(vip->video_dev); 1137release_irq: 1138 free_irq(pdev->irq, vip); 1139release_buf: 1140 sta2x11_vip_release_buffer(vip); 1141 pci_disable_msi(pdev); 1142unmap: 1143 vb2_queue_release(&vip->vb_vidq); 1144 pci_iounmap(pdev, vip->iomem); 1145release: 1146 pci_release_regions(pdev); 1147unreg: 1148 v4l2_device_unregister(&vip->v4l2_dev); 1149free_mem: 1150 kfree(vip); 1151release_gpios: 1152 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); 1153 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); 1154disable: 1155 /* 1156 * do not call pci_disable_device on sta2x11 because it break all 1157 * other Bus masters on this EP 1158 */ 1159 return ret; 1160} 1161 1162/** 1163 * sta2x11_vip_remove_one - release device 1164 * @pdev: PCI device 1165 * 1166 * Undo everything done in .._init_one 1167 * 1168 * unregister video device 1169 * free interrupt 1170 * unmap ioadresses 1171 * free memory 1172 * free GPIO pins 1173 */ 1174static void sta2x11_vip_remove_one(struct pci_dev *pdev) 1175{ 1176 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1177 struct sta2x11_vip *vip = 1178 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1179 1180 sta2x11_vip_clear_register(vip); 1181 1182 video_set_drvdata(vip->video_dev, NULL); 1183 video_unregister_device(vip->video_dev); 1184 /*do not call video_device_release() here, is already done */ 1185 free_irq(pdev->irq, vip); 1186 pci_disable_msi(pdev); 1187 vb2_queue_release(&vip->vb_vidq); 1188 pci_iounmap(pdev, vip->iomem); 1189 pci_release_regions(pdev); 1190 1191 v4l2_device_unregister(&vip->v4l2_dev); 1192 1193 vip_gpio_release(&pdev->dev, vip->config->pwr_pin, 1194 vip->config->pwr_name); 1195 vip_gpio_release(&pdev->dev, vip->config->reset_pin, 1196 vip->config->reset_name); 1197 1198 kfree(vip); 1199 /* 1200 * do not call pci_disable_device on sta2x11 because it break all 1201 * other Bus masters on this EP 1202 */ 1203} 1204 1205#ifdef CONFIG_PM 1206 1207/** 1208 * sta2x11_vip_suspend - set device into power save mode 1209 * @pdev: PCI device 1210 * @state: new state of device 1211 * 1212 * all relevant registers are saved and an attempt to set a new state is made. 1213 * 1214 * return value: 0 always indicate success, 1215 * even if device could not be disabled. (workaround for hardware problem) 1216 */ 1217static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state) 1218{ 1219 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1220 struct sta2x11_vip *vip = 1221 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1222 unsigned long flags; 1223 int i; 1224 1225 spin_lock_irqsave(&vip->slock, flags); 1226 vip->register_save_area[0] = reg_read(vip, DVP_CTL); 1227 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); 1228 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); 1229 reg_write(vip, DVP_ITM, 0); 1230 for (i = 1; i < SAVE_COUNT; i++) 1231 vip->register_save_area[i] = reg_read(vip, 4 * i); 1232 for (i = 0; i < AUX_COUNT; i++) 1233 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = 1234 reg_read(vip, registers_to_save[i]); 1235 spin_unlock_irqrestore(&vip->slock, flags); 1236 /* save pci state */ 1237 pci_save_state(pdev); 1238 if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) { 1239 /* 1240 * do not call pci_disable_device on sta2x11 because it 1241 * break all other Bus masters on this EP 1242 */ 1243 vip->disabled = 1; 1244 } 1245 1246 pr_info("VIP: suspend\n"); 1247 return 0; 1248} 1249 1250/** 1251 * sta2x11_vip_resume - resume device operation 1252 * @pdev : PCI device 1253 * 1254 * re-enable device, set PCI state to powered and restore registers. 1255 * resume normal device operation afterwards. 1256 * 1257 * return value: 0, no error. 1258 * 1259 * other, could not set device to power on state. 1260 */ 1261static int sta2x11_vip_resume(struct pci_dev *pdev) 1262{ 1263 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1264 struct sta2x11_vip *vip = 1265 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1266 unsigned long flags; 1267 int ret, i; 1268 1269 pr_info("VIP: resume\n"); 1270 /* restore pci state */ 1271 if (vip->disabled) { 1272 ret = pci_enable_device(pdev); 1273 if (ret) { 1274 pr_warn("VIP: Can't enable device.\n"); 1275 return ret; 1276 } 1277 vip->disabled = 0; 1278 } 1279 ret = pci_set_power_state(pdev, PCI_D0); 1280 if (ret) { 1281 /* 1282 * do not call pci_disable_device on sta2x11 because it 1283 * break all other Bus masters on this EP 1284 */ 1285 pr_warn("VIP: Can't enable device.\n"); 1286 vip->disabled = 1; 1287 return ret; 1288 } 1289 1290 pci_restore_state(pdev); 1291 1292 spin_lock_irqsave(&vip->slock, flags); 1293 for (i = 1; i < SAVE_COUNT; i++) 1294 reg_write(vip, 4 * i, vip->register_save_area[i]); 1295 for (i = 0; i < AUX_COUNT; i++) 1296 reg_write(vip, registers_to_save[i], 1297 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); 1298 reg_write(vip, DVP_CTL, vip->register_save_area[0]); 1299 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); 1300 spin_unlock_irqrestore(&vip->slock, flags); 1301 return 0; 1302} 1303 1304#endif 1305 1306static DEFINE_PCI_DEVICE_TABLE(sta2x11_vip_pci_tbl) = { 1307 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, 1308 {0,} 1309}; 1310 1311static struct pci_driver sta2x11_vip_driver = { 1312 .name = KBUILD_MODNAME, 1313 .probe = sta2x11_vip_init_one, 1314 .remove = sta2x11_vip_remove_one, 1315 .id_table = sta2x11_vip_pci_tbl, 1316#ifdef CONFIG_PM 1317 .suspend = sta2x11_vip_suspend, 1318 .resume = sta2x11_vip_resume, 1319#endif 1320}; 1321 1322static int __init sta2x11_vip_init_module(void) 1323{ 1324 return pci_register_driver(&sta2x11_vip_driver); 1325} 1326 1327static void __exit sta2x11_vip_exit_module(void) 1328{ 1329 pci_unregister_driver(&sta2x11_vip_driver); 1330} 1331 1332#ifdef MODULE 1333module_init(sta2x11_vip_init_module); 1334module_exit(sta2x11_vip_exit_module); 1335#else 1336late_initcall_sync(sta2x11_vip_init_module); 1337#endif 1338 1339MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); 1340MODULE_AUTHOR("Wind River"); 1341MODULE_LICENSE("GPL v2"); 1342MODULE_SUPPORTED_DEVICE("sta2x11 video input"); 1343MODULE_VERSION(DRV_VERSION); 1344MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); 1345