sta2x11_vip.c revision 0647064293d745720fc62e2edc7734fa8af06adf
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 void 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 343static int start_streaming(struct vb2_queue *vq, unsigned int count) 344{ 345 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 346 347 spin_lock_irq(&vip->slock); 348 /* Enable interrupt VSYNC Top and Bottom*/ 349 reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST); 350 spin_unlock_irq(&vip->slock); 351 352 if (count) 353 start_dma(vip, vip->active); 354 355 return 0; 356} 357 358/* abort streaming and wait for last buffer */ 359static int stop_streaming(struct vb2_queue *vq) 360{ 361 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 362 struct vip_buffer *vip_buf, *node; 363 364 /* Disable acquisition */ 365 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 366 /* Disable all interrupts */ 367 reg_write(vip, DVP_ITM, 0); 368 369 /* Release all active buffers */ 370 spin_lock(&vip->lock); 371 list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) { 372 vb2_buffer_done(&vip_buf->vb, VB2_BUF_STATE_ERROR); 373 list_del(&vip_buf->list); 374 } 375 spin_unlock(&vip->lock); 376 return 0; 377} 378 379static struct vb2_ops vip_video_qops = { 380 .queue_setup = queue_setup, 381 .buf_init = buffer_init, 382 .buf_prepare = buffer_prepare, 383 .buf_finish = buffer_finish, 384 .buf_queue = buffer_queue, 385 .start_streaming = start_streaming, 386 .stop_streaming = stop_streaming, 387}; 388 389 390/* File Operations */ 391static const struct v4l2_file_operations vip_fops = { 392 .owner = THIS_MODULE, 393 .open = v4l2_fh_open, 394 .release = vb2_fop_release, 395 .unlocked_ioctl = video_ioctl2, 396 .read = vb2_fop_read, 397 .mmap = vb2_fop_mmap, 398 .poll = vb2_fop_poll 399}; 400 401 402/** 403 * vidioc_querycap - return capabilities of device 404 * @file: descriptor of device 405 * @cap: contains return values 406 * 407 * the capabilities of the device are returned 408 * 409 * return value: 0, no error. 410 */ 411static int vidioc_querycap(struct file *file, void *priv, 412 struct v4l2_capability *cap) 413{ 414 struct sta2x11_vip *vip = video_drvdata(file); 415 416 strcpy(cap->driver, KBUILD_MODNAME); 417 strcpy(cap->card, KBUILD_MODNAME); 418 snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s", 419 pci_name(vip->pdev)); 420 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 421 V4L2_CAP_STREAMING; 422 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 423 424 return 0; 425} 426 427/** 428 * vidioc_s_std - set video standard 429 * @file: descriptor of device 430 * @std: contains standard to be set 431 * 432 * the video standard is set 433 * 434 * return value: 0, no error. 435 * 436 * -EIO, no input signal detected 437 * 438 * other, returned from video DAC. 439 */ 440static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) 441{ 442 struct sta2x11_vip *vip = video_drvdata(file); 443 v4l2_std_id oldstd = vip->std, newstd; 444 int status; 445 446 if (V4L2_STD_ALL == std) { 447 v4l2_subdev_call(vip->decoder, core, s_std, std); 448 ssleep(2); 449 v4l2_subdev_call(vip->decoder, video, querystd, &newstd); 450 v4l2_subdev_call(vip->decoder, video, g_input_status, &status); 451 if (status & V4L2_IN_ST_NO_SIGNAL) 452 return -EIO; 453 std = vip->std = newstd; 454 if (oldstd != std) { 455 if (V4L2_STD_525_60 & std) 456 vip->format = formats_60[0]; 457 else 458 vip->format = formats_50[0]; 459 } 460 return 0; 461 } 462 463 if (oldstd != std) { 464 if (V4L2_STD_525_60 & std) 465 vip->format = formats_60[0]; 466 else 467 vip->format = formats_50[0]; 468 } 469 470 return v4l2_subdev_call(vip->decoder, core, s_std, std); 471} 472 473/** 474 * vidioc_g_std - get video standard 475 * @file: descriptor of device 476 * @std: contains return values 477 * 478 * the current video standard is returned 479 * 480 * return value: 0, no error. 481 */ 482static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) 483{ 484 struct sta2x11_vip *vip = video_drvdata(file); 485 486 *std = vip->std; 487 return 0; 488} 489 490/** 491 * vidioc_querystd - get possible video standards 492 * @file: descriptor of device 493 * @std: contains return values 494 * 495 * all possible video standards are returned 496 * 497 * return value: delivered by video DAC routine. 498 */ 499static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) 500{ 501 struct sta2x11_vip *vip = video_drvdata(file); 502 503 return v4l2_subdev_call(vip->decoder, video, querystd, std); 504} 505 506static int vidioc_enum_input(struct file *file, void *priv, 507 struct v4l2_input *inp) 508{ 509 if (inp->index > 1) 510 return -EINVAL; 511 512 inp->type = V4L2_INPUT_TYPE_CAMERA; 513 inp->std = V4L2_STD_ALL; 514 sprintf(inp->name, "Camera %u", inp->index); 515 516 return 0; 517} 518 519/** 520 * vidioc_s_input - set input line 521 * @file: descriptor of device 522 * @i: new input line number 523 * 524 * the current active input line is set 525 * 526 * return value: 0, no error. 527 * 528 * -EINVAL, line number out of range 529 */ 530static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 531{ 532 struct sta2x11_vip *vip = video_drvdata(file); 533 int ret; 534 535 if (i > 1) 536 return -EINVAL; 537 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); 538 539 if (!ret) 540 vip->input = i; 541 542 return 0; 543} 544 545/** 546 * vidioc_g_input - return input line 547 * @file: descriptor of device 548 * @i: returned input line number 549 * 550 * the current active input line is returned 551 * 552 * return value: always 0. 553 */ 554static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 555{ 556 struct sta2x11_vip *vip = video_drvdata(file); 557 558 *i = vip->input; 559 return 0; 560} 561 562/** 563 * vidioc_enum_fmt_vid_cap - return video capture format 564 * @f: returned format information 565 * 566 * returns name and format of video capture 567 * Only UYVY is supported by hardware. 568 * 569 * return value: always 0. 570 */ 571static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 572 struct v4l2_fmtdesc *f) 573{ 574 575 if (f->index != 0) 576 return -EINVAL; 577 578 strcpy(f->description, "4:2:2, packed, UYVY"); 579 f->pixelformat = V4L2_PIX_FMT_UYVY; 580 f->flags = 0; 581 return 0; 582} 583 584/** 585 * vidioc_try_fmt_vid_cap - set video capture format 586 * @file: descriptor of device 587 * @f: new format 588 * 589 * new video format is set which includes width and 590 * field type. width is fixed to 720, no scaling. 591 * Only UYVY is supported by this hardware. 592 * the minimum height is 200, the maximum is 576 (PAL) 593 * 594 * return value: 0, no error 595 * 596 * -EINVAL, pixel or field format not supported 597 * 598 */ 599static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 600 struct v4l2_format *f) 601{ 602 struct sta2x11_vip *vip = video_drvdata(file); 603 int interlace_lim; 604 605 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { 606 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n"); 607 return -EINVAL; 608 } 609 610 if (V4L2_STD_525_60 & vip->std) 611 interlace_lim = 240; 612 else 613 interlace_lim = 288; 614 615 switch (f->fmt.pix.field) { 616 default: 617 case V4L2_FIELD_ANY: 618 if (interlace_lim < f->fmt.pix.height) 619 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 620 else 621 f->fmt.pix.field = V4L2_FIELD_BOTTOM; 622 break; 623 case V4L2_FIELD_TOP: 624 case V4L2_FIELD_BOTTOM: 625 if (interlace_lim < f->fmt.pix.height) 626 f->fmt.pix.height = interlace_lim; 627 break; 628 case V4L2_FIELD_INTERLACED: 629 break; 630 } 631 632 /* It is the only supported format */ 633 f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; 634 f->fmt.pix.height &= ~1; 635 if (2 * interlace_lim < f->fmt.pix.height) 636 f->fmt.pix.height = 2 * interlace_lim; 637 if (200 > f->fmt.pix.height) 638 f->fmt.pix.height = 200; 639 f->fmt.pix.width = 720; 640 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 641 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; 642 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 643 f->fmt.pix.priv = 0; 644 return 0; 645} 646 647/** 648 * vidioc_s_fmt_vid_cap - set current video format parameters 649 * @file: descriptor of device 650 * @f: returned format information 651 * 652 * set new capture format 653 * return value: 0, no error 654 * 655 * other, delivered by video DAC routine. 656 */ 657static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 658 struct v4l2_format *f) 659{ 660 struct sta2x11_vip *vip = video_drvdata(file); 661 unsigned int t_stop, b_stop, pitch; 662 int ret; 663 664 ret = vidioc_try_fmt_vid_cap(file, priv, f); 665 if (ret) 666 return ret; 667 668 if (vb2_is_busy(&vip->vb_vidq)) { 669 /* Can't change format during acquisition */ 670 v4l2_err(&vip->v4l2_dev, "device busy\n"); 671 return -EBUSY; 672 } 673 vip->format = f->fmt.pix; 674 switch (vip->format.field) { 675 case V4L2_FIELD_INTERLACED: 676 t_stop = ((vip->format.height / 2 - 1) << 16) | 677 (2 * vip->format.width - 1); 678 b_stop = t_stop; 679 pitch = 4 * vip->format.width; 680 break; 681 case V4L2_FIELD_TOP: 682 t_stop = ((vip->format.height - 1) << 16) | 683 (2 * vip->format.width - 1); 684 b_stop = (0 << 16) | (2 * vip->format.width - 1); 685 pitch = 2 * vip->format.width; 686 break; 687 case V4L2_FIELD_BOTTOM: 688 t_stop = (0 << 16) | (2 * vip->format.width - 1); 689 b_stop = (vip->format.height << 16) | 690 (2 * vip->format.width - 1); 691 pitch = 2 * vip->format.width; 692 break; 693 default: 694 v4l2_err(&vip->v4l2_dev, "unknown field format\n"); 695 return -EINVAL; 696 } 697 698 spin_lock_irq(&vip->slock); 699 /* Y-X Top Field Offset */ 700 reg_write(vip, DVP_TFO, 0); 701 /* Y-X Bottom Field Offset */ 702 reg_write(vip, DVP_BFO, 0); 703 /* Y-X Top Field Stop*/ 704 reg_write(vip, DVP_TFS, t_stop); 705 /* Y-X Bottom Field Stop */ 706 reg_write(vip, DVP_BFS, b_stop); 707 /* Video Memory Pitch */ 708 reg_write(vip, DVP_VMP, pitch); 709 spin_unlock_irq(&vip->slock); 710 711 return 0; 712} 713 714/** 715 * vidioc_g_fmt_vid_cap - get current video format parameters 716 * @file: descriptor of device 717 * @f: contains format information 718 * 719 * returns current video format parameters 720 * 721 * return value: 0, always successful 722 */ 723static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 724 struct v4l2_format *f) 725{ 726 struct sta2x11_vip *vip = video_drvdata(file); 727 728 f->fmt.pix = vip->format; 729 730 return 0; 731} 732 733static const struct v4l2_ioctl_ops vip_ioctl_ops = { 734 .vidioc_querycap = vidioc_querycap, 735 /* FMT handling */ 736 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 737 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 738 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 739 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 740 /* Buffer handlers */ 741 .vidioc_create_bufs = vb2_ioctl_create_bufs, 742 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 743 .vidioc_reqbufs = vb2_ioctl_reqbufs, 744 .vidioc_querybuf = vb2_ioctl_querybuf, 745 .vidioc_qbuf = vb2_ioctl_qbuf, 746 .vidioc_dqbuf = vb2_ioctl_dqbuf, 747 /* Stream on/off */ 748 .vidioc_streamon = vb2_ioctl_streamon, 749 .vidioc_streamoff = vb2_ioctl_streamoff, 750 /* Standard handling */ 751 .vidioc_g_std = vidioc_g_std, 752 .vidioc_s_std = vidioc_s_std, 753 .vidioc_querystd = vidioc_querystd, 754 /* Input handling */ 755 .vidioc_enum_input = vidioc_enum_input, 756 .vidioc_g_input = vidioc_g_input, 757 .vidioc_s_input = vidioc_s_input, 758 /* Log status ioctl */ 759 .vidioc_log_status = v4l2_ctrl_log_status, 760 /* Event handling */ 761 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 762 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 763}; 764 765static struct video_device video_dev_template = { 766 .name = KBUILD_MODNAME, 767 .release = video_device_release, 768 .fops = &vip_fops, 769 .ioctl_ops = &vip_ioctl_ops, 770 .tvnorms = V4L2_STD_ALL, 771}; 772 773/** 774 * vip_irq - interrupt routine 775 * @irq: Number of interrupt ( not used, correct number is assumed ) 776 * @vip: local data structure containing all information 777 * 778 * check for both frame interrupts set ( top and bottom ). 779 * check FIFO overflow, but limit number of log messages after open. 780 * signal a complete buffer if done 781 * 782 * return value: IRQ_NONE, interrupt was not generated by VIP 783 * 784 * IRQ_HANDLED, interrupt done. 785 */ 786static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip) 787{ 788 unsigned int status; 789 790 status = reg_read(vip, DVP_ITS); 791 792 if (!status) /* No interrupt to handle */ 793 return IRQ_NONE; 794 795 if (status & DVP_IT_FIFO) 796 if (vip->overflow++ > 5) 797 pr_info("VIP: fifo overflow\n"); 798 799 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { 800 /* this is bad, we are too slow, hope the condition is gone 801 * on the next frame */ 802 return IRQ_HANDLED; 803 } 804 805 if (status & DVP_IT_VST) 806 if ((++vip->tcount) < 2) 807 return IRQ_HANDLED; 808 if (status & DVP_IT_VSB) { 809 vip->bcount++; 810 return IRQ_HANDLED; 811 } 812 813 if (vip->active) { /* Acquisition is over on this buffer */ 814 /* Disable acquisition */ 815 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 816 /* Remove the active buffer from the list */ 817 do_gettimeofday(&vip->active->vb.v4l2_buf.timestamp); 818 vip->active->vb.v4l2_buf.sequence = vip->sequence++; 819 vb2_buffer_done(&vip->active->vb, VB2_BUF_STATE_DONE); 820 } 821 822 return IRQ_HANDLED; 823} 824 825static void sta2x11_vip_init_register(struct sta2x11_vip *vip) 826{ 827 /* Register initialization */ 828 spin_lock_irq(&vip->slock); 829 /* Clean interrupt */ 830 reg_read(vip, DVP_ITS); 831 /* Enable Half Line per vertical */ 832 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); 833 /* Reset VIP control */ 834 reg_write(vip, DVP_CTL, DVP_CTL_RST); 835 /* Clear VIP control */ 836 reg_write(vip, DVP_CTL, 0); 837 spin_unlock_irq(&vip->slock); 838} 839static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) 840{ 841 spin_lock_irq(&vip->slock); 842 /* Disable interrupt */ 843 reg_write(vip, DVP_ITM, 0); 844 /* Reset VIP Control */ 845 reg_write(vip, DVP_CTL, DVP_CTL_RST); 846 /* Clear VIP Control */ 847 reg_write(vip, DVP_CTL, 0); 848 /* Clean VIP Interrupt */ 849 reg_read(vip, DVP_ITS); 850 spin_unlock_irq(&vip->slock); 851} 852static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) 853{ 854 int err; 855 856 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); 857 if (err) { 858 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); 859 return err; 860 } 861 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); 862 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 863 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; 864 vip->vb_vidq.drv_priv = vip; 865 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); 866 vip->vb_vidq.ops = &vip_video_qops; 867 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; 868 err = vb2_queue_init(&vip->vb_vidq); 869 if (err) 870 return err; 871 INIT_LIST_HEAD(&vip->buffer_list); 872 spin_lock_init(&vip->lock); 873 874 875 vip->alloc_ctx = vb2_dma_contig_init_ctx(&vip->pdev->dev); 876 if (IS_ERR(vip->alloc_ctx)) { 877 v4l2_err(&vip->v4l2_dev, "Can't allocate buffer context"); 878 return PTR_ERR(vip->alloc_ctx); 879 } 880 881 return 0; 882} 883static void sta2x11_vip_release_buffer(struct sta2x11_vip *vip) 884{ 885 vb2_dma_contig_cleanup_ctx(vip->alloc_ctx); 886} 887static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) 888{ 889 /* 890 * Inititialize an empty control so VIP can inerithing controls 891 * from ADV7180 892 */ 893 v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); 894 895 vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; 896 if (vip->ctrl_hdl.error) { 897 int err = vip->ctrl_hdl.error; 898 899 v4l2_ctrl_handler_free(&vip->ctrl_hdl); 900 return err; 901 } 902 903 return 0; 904} 905 906/** 907 * vip_gpio_reserve - reserve gpio pin 908 * @dev: device 909 * @pin: GPIO pin number 910 * @dir: direction, input or output 911 * @name: GPIO pin name 912 * 913 */ 914static int vip_gpio_reserve(struct device *dev, int pin, int dir, 915 const char *name) 916{ 917 int ret; 918 919 if (pin == -1) 920 return 0; 921 922 ret = gpio_request(pin, name); 923 if (ret) { 924 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); 925 return ret; 926 } 927 928 ret = gpio_direction_output(pin, dir); 929 if (ret) { 930 dev_err(dev, "Failed to set direction for pin %d (%s)\n", 931 pin, name); 932 gpio_free(pin); 933 return ret; 934 } 935 936 ret = gpio_export(pin, false); 937 if (ret) { 938 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); 939 gpio_free(pin); 940 return ret; 941 } 942 943 return 0; 944} 945 946/** 947 * vip_gpio_release - release gpio pin 948 * @dev: device 949 * @pin: GPIO pin number 950 * @name: GPIO pin name 951 * 952 */ 953static void vip_gpio_release(struct device *dev, int pin, const char *name) 954{ 955 if (pin != -1) { 956 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); 957 gpio_unexport(pin); 958 gpio_free(pin); 959 } 960} 961 962/** 963 * sta2x11_vip_init_one - init one instance of video device 964 * @pdev: PCI device 965 * @ent: (not used) 966 * 967 * allocate reset pins for DAC. 968 * Reset video DAC, this is done via reset line. 969 * allocate memory for managing device 970 * request interrupt 971 * map IO region 972 * register device 973 * find and initialize video DAC 974 * 975 * return value: 0, no error 976 * 977 * -ENOMEM, no memory 978 * 979 * -ENODEV, device could not be detected or registered 980 */ 981static int sta2x11_vip_init_one(struct pci_dev *pdev, 982 const struct pci_device_id *ent) 983{ 984 int ret; 985 struct sta2x11_vip *vip; 986 struct vip_config *config; 987 988 /* Check if hardware support 26-bit DMA */ 989 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { 990 dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); 991 return -EINVAL; 992 } 993 /* Enable PCI */ 994 ret = pci_enable_device(pdev); 995 if (ret) 996 return ret; 997 998 /* Get VIP platform data */ 999 config = dev_get_platdata(&pdev->dev); 1000 if (!config) { 1001 dev_info(&pdev->dev, "VIP slot disabled\n"); 1002 ret = -EINVAL; 1003 goto disable; 1004 } 1005 1006 /* Power configuration */ 1007 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, 1008 config->pwr_name); 1009 if (ret) 1010 goto disable; 1011 1012 if (config->reset_pin >= 0) { 1013 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, 1014 config->reset_name); 1015 if (ret) { 1016 vip_gpio_release(&pdev->dev, config->pwr_pin, 1017 config->pwr_name); 1018 goto disable; 1019 } 1020 } 1021 if (config->pwr_pin != -1) { 1022 /* Datasheet says 5ms between PWR and RST */ 1023 usleep_range(5000, 25000); 1024 ret = gpio_direction_output(config->pwr_pin, 1); 1025 } 1026 1027 if (config->reset_pin != -1) { 1028 /* Datasheet says 5ms between PWR and RST */ 1029 usleep_range(5000, 25000); 1030 ret = gpio_direction_output(config->reset_pin, 1); 1031 } 1032 usleep_range(5000, 25000); 1033 1034 /* Allocate a new VIP instance */ 1035 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); 1036 if (!vip) { 1037 ret = -ENOMEM; 1038 goto release_gpios; 1039 } 1040 vip->pdev = pdev; 1041 vip->std = V4L2_STD_PAL; 1042 vip->format = formats_50[0]; 1043 vip->config = config; 1044 1045 ret = sta2x11_vip_init_controls(vip); 1046 if (ret) 1047 goto free_mem; 1048 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); 1049 if (ret) 1050 goto free_mem; 1051 1052 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", 1053 (unsigned long)pci_resource_start(pdev, 0), 1054 (unsigned long)pci_resource_len(pdev, 0), pdev->irq); 1055 1056 pci_set_master(pdev); 1057 1058 ret = pci_request_regions(pdev, KBUILD_MODNAME); 1059 if (ret) 1060 goto unreg; 1061 1062 vip->iomem = pci_iomap(pdev, 0, 0x100); 1063 if (!vip->iomem) { 1064 ret = -ENOMEM; 1065 goto release; 1066 } 1067 1068 pci_enable_msi(pdev); 1069 1070 /* Initialize buffer */ 1071 ret = sta2x11_vip_init_buffer(vip); 1072 if (ret) 1073 goto unmap; 1074 1075 spin_lock_init(&vip->slock); 1076 1077 ret = request_irq(pdev->irq, 1078 (irq_handler_t) vip_irq, 1079 IRQF_SHARED, KBUILD_MODNAME, vip); 1080 if (ret) { 1081 dev_err(&pdev->dev, "request_irq failed\n"); 1082 ret = -ENODEV; 1083 goto release_buf; 1084 } 1085 1086 /* Alloc, initialize and register video device */ 1087 vip->video_dev = video_device_alloc(); 1088 if (!vip->video_dev) { 1089 ret = -ENOMEM; 1090 goto release_irq; 1091 } 1092 1093 vip->video_dev = &video_dev_template; 1094 vip->video_dev->v4l2_dev = &vip->v4l2_dev; 1095 vip->video_dev->queue = &vip->vb_vidq; 1096 set_bit(V4L2_FL_USE_FH_PRIO, &vip->video_dev->flags); 1097 video_set_drvdata(vip->video_dev, vip); 1098 1099 ret = video_register_device(vip->video_dev, VFL_TYPE_GRABBER, -1); 1100 if (ret) 1101 goto vrelease; 1102 1103 /* Get ADV7180 subdevice */ 1104 vip->adapter = i2c_get_adapter(vip->config->i2c_id); 1105 if (!vip->adapter) { 1106 ret = -ENODEV; 1107 dev_err(&pdev->dev, "no I2C adapter found\n"); 1108 goto vunreg; 1109 } 1110 1111 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, 1112 "adv7180", vip->config->i2c_addr, 1113 NULL); 1114 if (!vip->decoder) { 1115 ret = -ENODEV; 1116 dev_err(&pdev->dev, "no decoder found\n"); 1117 goto vunreg; 1118 } 1119 1120 i2c_put_adapter(vip->adapter); 1121 v4l2_subdev_call(vip->decoder, core, init, 0); 1122 1123 sta2x11_vip_init_register(vip); 1124 1125 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); 1126 return 0; 1127 1128vunreg: 1129 video_set_drvdata(vip->video_dev, NULL); 1130vrelease: 1131 if (video_is_registered(vip->video_dev)) 1132 video_unregister_device(vip->video_dev); 1133 else 1134 video_device_release(vip->video_dev); 1135release_irq: 1136 free_irq(pdev->irq, vip); 1137release_buf: 1138 sta2x11_vip_release_buffer(vip); 1139 pci_disable_msi(pdev); 1140unmap: 1141 vb2_queue_release(&vip->vb_vidq); 1142 pci_iounmap(pdev, vip->iomem); 1143release: 1144 pci_release_regions(pdev); 1145unreg: 1146 v4l2_device_unregister(&vip->v4l2_dev); 1147free_mem: 1148 kfree(vip); 1149release_gpios: 1150 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); 1151 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); 1152disable: 1153 /* 1154 * do not call pci_disable_device on sta2x11 because it break all 1155 * other Bus masters on this EP 1156 */ 1157 return ret; 1158} 1159 1160/** 1161 * sta2x11_vip_remove_one - release device 1162 * @pdev: PCI device 1163 * 1164 * Undo everything done in .._init_one 1165 * 1166 * unregister video device 1167 * free interrupt 1168 * unmap ioadresses 1169 * free memory 1170 * free GPIO pins 1171 */ 1172static void sta2x11_vip_remove_one(struct pci_dev *pdev) 1173{ 1174 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1175 struct sta2x11_vip *vip = 1176 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1177 1178 sta2x11_vip_clear_register(vip); 1179 1180 video_set_drvdata(vip->video_dev, NULL); 1181 video_unregister_device(vip->video_dev); 1182 /*do not call video_device_release() here, is already done */ 1183 free_irq(pdev->irq, vip); 1184 pci_disable_msi(pdev); 1185 vb2_queue_release(&vip->vb_vidq); 1186 pci_iounmap(pdev, vip->iomem); 1187 pci_release_regions(pdev); 1188 1189 v4l2_device_unregister(&vip->v4l2_dev); 1190 1191 vip_gpio_release(&pdev->dev, vip->config->pwr_pin, 1192 vip->config->pwr_name); 1193 vip_gpio_release(&pdev->dev, vip->config->reset_pin, 1194 vip->config->reset_name); 1195 1196 kfree(vip); 1197 /* 1198 * do not call pci_disable_device on sta2x11 because it break all 1199 * other Bus masters on this EP 1200 */ 1201} 1202 1203#ifdef CONFIG_PM 1204 1205/** 1206 * sta2x11_vip_suspend - set device into power save mode 1207 * @pdev: PCI device 1208 * @state: new state of device 1209 * 1210 * all relevant registers are saved and an attempt to set a new state is made. 1211 * 1212 * return value: 0 always indicate success, 1213 * even if device could not be disabled. (workaround for hardware problem) 1214 */ 1215static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state) 1216{ 1217 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1218 struct sta2x11_vip *vip = 1219 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1220 unsigned long flags; 1221 int i; 1222 1223 spin_lock_irqsave(&vip->slock, flags); 1224 vip->register_save_area[0] = reg_read(vip, DVP_CTL); 1225 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); 1226 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); 1227 reg_write(vip, DVP_ITM, 0); 1228 for (i = 1; i < SAVE_COUNT; i++) 1229 vip->register_save_area[i] = reg_read(vip, 4 * i); 1230 for (i = 0; i < AUX_COUNT; i++) 1231 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = 1232 reg_read(vip, registers_to_save[i]); 1233 spin_unlock_irqrestore(&vip->slock, flags); 1234 /* save pci state */ 1235 pci_save_state(pdev); 1236 if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) { 1237 /* 1238 * do not call pci_disable_device on sta2x11 because it 1239 * break all other Bus masters on this EP 1240 */ 1241 vip->disabled = 1; 1242 } 1243 1244 pr_info("VIP: suspend\n"); 1245 return 0; 1246} 1247 1248/** 1249 * sta2x11_vip_resume - resume device operation 1250 * @pdev : PCI device 1251 * 1252 * re-enable device, set PCI state to powered and restore registers. 1253 * resume normal device operation afterwards. 1254 * 1255 * return value: 0, no error. 1256 * 1257 * other, could not set device to power on state. 1258 */ 1259static int sta2x11_vip_resume(struct pci_dev *pdev) 1260{ 1261 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1262 struct sta2x11_vip *vip = 1263 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1264 unsigned long flags; 1265 int ret, i; 1266 1267 pr_info("VIP: resume\n"); 1268 /* restore pci state */ 1269 if (vip->disabled) { 1270 ret = pci_enable_device(pdev); 1271 if (ret) { 1272 pr_warn("VIP: Can't enable device.\n"); 1273 return ret; 1274 } 1275 vip->disabled = 0; 1276 } 1277 ret = pci_set_power_state(pdev, PCI_D0); 1278 if (ret) { 1279 /* 1280 * do not call pci_disable_device on sta2x11 because it 1281 * break all other Bus masters on this EP 1282 */ 1283 pr_warn("VIP: Can't enable device.\n"); 1284 vip->disabled = 1; 1285 return ret; 1286 } 1287 1288 pci_restore_state(pdev); 1289 1290 spin_lock_irqsave(&vip->slock, flags); 1291 for (i = 1; i < SAVE_COUNT; i++) 1292 reg_write(vip, 4 * i, vip->register_save_area[i]); 1293 for (i = 0; i < AUX_COUNT; i++) 1294 reg_write(vip, registers_to_save[i], 1295 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); 1296 reg_write(vip, DVP_CTL, vip->register_save_area[0]); 1297 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); 1298 spin_unlock_irqrestore(&vip->slock, flags); 1299 return 0; 1300} 1301 1302#endif 1303 1304static const struct pci_device_id sta2x11_vip_pci_tbl[] = { 1305 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, 1306 {0,} 1307}; 1308 1309static struct pci_driver sta2x11_vip_driver = { 1310 .name = KBUILD_MODNAME, 1311 .probe = sta2x11_vip_init_one, 1312 .remove = sta2x11_vip_remove_one, 1313 .id_table = sta2x11_vip_pci_tbl, 1314#ifdef CONFIG_PM 1315 .suspend = sta2x11_vip_suspend, 1316 .resume = sta2x11_vip_resume, 1317#endif 1318}; 1319 1320static int __init sta2x11_vip_init_module(void) 1321{ 1322 return pci_register_driver(&sta2x11_vip_driver); 1323} 1324 1325static void __exit sta2x11_vip_exit_module(void) 1326{ 1327 pci_unregister_driver(&sta2x11_vip_driver); 1328} 1329 1330#ifdef MODULE 1331module_init(sta2x11_vip_init_module); 1332module_exit(sta2x11_vip_exit_module); 1333#else 1334late_initcall_sync(sta2x11_vip_init_module); 1335#endif 1336 1337MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); 1338MODULE_AUTHOR("Wind River"); 1339MODULE_LICENSE("GPL v2"); 1340MODULE_SUPPORTED_DEVICE("sta2x11 video input"); 1341MODULE_VERSION(DRV_VERSION); 1342MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); 1343