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_buffer vb; 92 struct list_head list; 93 dma_addr_t dma; 94 }; 95 static 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 */ 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, 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 }; 288 static 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 } 296 297 static 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 } 314 static 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 } 330 static 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 if (vb2_is_streaming(vb->vb2_queue)) 341 vip_active_buf_next(vip); 342 } 343 344 static int start_streaming(struct vb2_queue *vq, unsigned int count) 345 { 346 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 347 348 spin_lock_irq(&vip->slock); 349 /* Enable interrupt VSYNC Top and Bottom*/ 350 reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST); 351 spin_unlock_irq(&vip->slock); 352 353 if (count) 354 start_dma(vip, vip->active); 355 356 return 0; 357 } 358 359 /* abort streaming and wait for last buffer */ 360 static void stop_streaming(struct vb2_queue *vq) 361 { 362 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 363 struct vip_buffer *vip_buf, *node; 364 365 /* Disable acquisition */ 366 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 367 /* Disable all interrupts */ 368 reg_write(vip, DVP_ITM, 0); 369 370 /* Release all active buffers */ 371 spin_lock(&vip->lock); 372 list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) { 373 vb2_buffer_done(&vip_buf->vb, VB2_BUF_STATE_ERROR); 374 list_del(&vip_buf->list); 375 } 376 spin_unlock(&vip->lock); 377 } 378 379 static 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 */ 391 static 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 */ 411 static 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 */ 440 static 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, video, 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, video, 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 */ 482 static 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 */ 499 static 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 } 505 506 static 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 */ 530 static 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 */ 554 static 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 */ 571 static 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 */ 599 static 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 return 0; 644 } 645 646 /** 647 * vidioc_s_fmt_vid_cap - set current video format parameters 648 * @file: descriptor of device 649 * @f: returned format information 650 * 651 * set new capture format 652 * return value: 0, no error 653 * 654 * other, delivered by video DAC routine. 655 */ 656 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 657 struct v4l2_format *f) 658 { 659 struct sta2x11_vip *vip = video_drvdata(file); 660 unsigned int t_stop, b_stop, pitch; 661 int ret; 662 663 ret = vidioc_try_fmt_vid_cap(file, priv, f); 664 if (ret) 665 return ret; 666 667 if (vb2_is_busy(&vip->vb_vidq)) { 668 /* Can't change format during acquisition */ 669 v4l2_err(&vip->v4l2_dev, "device busy\n"); 670 return -EBUSY; 671 } 672 vip->format = f->fmt.pix; 673 switch (vip->format.field) { 674 case V4L2_FIELD_INTERLACED: 675 t_stop = ((vip->format.height / 2 - 1) << 16) | 676 (2 * vip->format.width - 1); 677 b_stop = t_stop; 678 pitch = 4 * vip->format.width; 679 break; 680 case V4L2_FIELD_TOP: 681 t_stop = ((vip->format.height - 1) << 16) | 682 (2 * vip->format.width - 1); 683 b_stop = (0 << 16) | (2 * vip->format.width - 1); 684 pitch = 2 * vip->format.width; 685 break; 686 case V4L2_FIELD_BOTTOM: 687 t_stop = (0 << 16) | (2 * vip->format.width - 1); 688 b_stop = (vip->format.height << 16) | 689 (2 * vip->format.width - 1); 690 pitch = 2 * vip->format.width; 691 break; 692 default: 693 v4l2_err(&vip->v4l2_dev, "unknown field format\n"); 694 return -EINVAL; 695 } 696 697 spin_lock_irq(&vip->slock); 698 /* Y-X Top Field Offset */ 699 reg_write(vip, DVP_TFO, 0); 700 /* Y-X Bottom Field Offset */ 701 reg_write(vip, DVP_BFO, 0); 702 /* Y-X Top Field Stop*/ 703 reg_write(vip, DVP_TFS, t_stop); 704 /* Y-X Bottom Field Stop */ 705 reg_write(vip, DVP_BFS, b_stop); 706 /* Video Memory Pitch */ 707 reg_write(vip, DVP_VMP, pitch); 708 spin_unlock_irq(&vip->slock); 709 710 return 0; 711 } 712 713 /** 714 * vidioc_g_fmt_vid_cap - get current video format parameters 715 * @file: descriptor of device 716 * @f: contains format information 717 * 718 * returns current video format parameters 719 * 720 * return value: 0, always successful 721 */ 722 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 723 struct v4l2_format *f) 724 { 725 struct sta2x11_vip *vip = video_drvdata(file); 726 727 f->fmt.pix = vip->format; 728 729 return 0; 730 } 731 732 static const struct v4l2_ioctl_ops vip_ioctl_ops = { 733 .vidioc_querycap = vidioc_querycap, 734 /* FMT handling */ 735 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 736 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 737 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 738 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 739 /* Buffer handlers */ 740 .vidioc_create_bufs = vb2_ioctl_create_bufs, 741 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 742 .vidioc_reqbufs = vb2_ioctl_reqbufs, 743 .vidioc_querybuf = vb2_ioctl_querybuf, 744 .vidioc_qbuf = vb2_ioctl_qbuf, 745 .vidioc_dqbuf = vb2_ioctl_dqbuf, 746 /* Stream on/off */ 747 .vidioc_streamon = vb2_ioctl_streamon, 748 .vidioc_streamoff = vb2_ioctl_streamoff, 749 /* Standard handling */ 750 .vidioc_g_std = vidioc_g_std, 751 .vidioc_s_std = vidioc_s_std, 752 .vidioc_querystd = vidioc_querystd, 753 /* Input handling */ 754 .vidioc_enum_input = vidioc_enum_input, 755 .vidioc_g_input = vidioc_g_input, 756 .vidioc_s_input = vidioc_s_input, 757 /* Log status ioctl */ 758 .vidioc_log_status = v4l2_ctrl_log_status, 759 /* Event handling */ 760 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 761 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 762 }; 763 764 static struct video_device video_dev_template = { 765 .name = KBUILD_MODNAME, 766 .release = video_device_release, 767 .fops = &vip_fops, 768 .ioctl_ops = &vip_ioctl_ops, 769 .tvnorms = V4L2_STD_ALL, 770 }; 771 772 /** 773 * vip_irq - interrupt routine 774 * @irq: Number of interrupt ( not used, correct number is assumed ) 775 * @vip: local data structure containing all information 776 * 777 * check for both frame interrupts set ( top and bottom ). 778 * check FIFO overflow, but limit number of log messages after open. 779 * signal a complete buffer if done 780 * 781 * return value: IRQ_NONE, interrupt was not generated by VIP 782 * 783 * IRQ_HANDLED, interrupt done. 784 */ 785 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip) 786 { 787 unsigned int status; 788 789 status = reg_read(vip, DVP_ITS); 790 791 if (!status) /* No interrupt to handle */ 792 return IRQ_NONE; 793 794 if (status & DVP_IT_FIFO) 795 if (vip->overflow++ > 5) 796 pr_info("VIP: fifo overflow\n"); 797 798 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { 799 /* this is bad, we are too slow, hope the condition is gone 800 * on the next frame */ 801 return IRQ_HANDLED; 802 } 803 804 if (status & DVP_IT_VST) 805 if ((++vip->tcount) < 2) 806 return IRQ_HANDLED; 807 if (status & DVP_IT_VSB) { 808 vip->bcount++; 809 return IRQ_HANDLED; 810 } 811 812 if (vip->active) { /* Acquisition is over on this buffer */ 813 /* Disable acquisition */ 814 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 815 /* Remove the active buffer from the list */ 816 do_gettimeofday(&vip->active->vb.v4l2_buf.timestamp); 817 vip->active->vb.v4l2_buf.sequence = vip->sequence++; 818 vb2_buffer_done(&vip->active->vb, VB2_BUF_STATE_DONE); 819 } 820 821 return IRQ_HANDLED; 822 } 823 824 static void sta2x11_vip_init_register(struct sta2x11_vip *vip) 825 { 826 /* Register initialization */ 827 spin_lock_irq(&vip->slock); 828 /* Clean interrupt */ 829 reg_read(vip, DVP_ITS); 830 /* Enable Half Line per vertical */ 831 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); 832 /* Reset VIP control */ 833 reg_write(vip, DVP_CTL, DVP_CTL_RST); 834 /* Clear VIP control */ 835 reg_write(vip, DVP_CTL, 0); 836 spin_unlock_irq(&vip->slock); 837 } 838 static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) 839 { 840 spin_lock_irq(&vip->slock); 841 /* Disable interrupt */ 842 reg_write(vip, DVP_ITM, 0); 843 /* Reset VIP Control */ 844 reg_write(vip, DVP_CTL, DVP_CTL_RST); 845 /* Clear VIP Control */ 846 reg_write(vip, DVP_CTL, 0); 847 /* Clean VIP Interrupt */ 848 reg_read(vip, DVP_ITS); 849 spin_unlock_irq(&vip->slock); 850 } 851 static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) 852 { 853 int err; 854 855 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); 856 if (err) { 857 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); 858 return err; 859 } 860 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); 861 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 862 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; 863 vip->vb_vidq.drv_priv = vip; 864 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); 865 vip->vb_vidq.ops = &vip_video_qops; 866 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; 867 err = vb2_queue_init(&vip->vb_vidq); 868 if (err) 869 return err; 870 INIT_LIST_HEAD(&vip->buffer_list); 871 spin_lock_init(&vip->lock); 872 873 874 vip->alloc_ctx = vb2_dma_contig_init_ctx(&vip->pdev->dev); 875 if (IS_ERR(vip->alloc_ctx)) { 876 v4l2_err(&vip->v4l2_dev, "Can't allocate buffer context"); 877 return PTR_ERR(vip->alloc_ctx); 878 } 879 880 return 0; 881 } 882 static void sta2x11_vip_release_buffer(struct sta2x11_vip *vip) 883 { 884 vb2_dma_contig_cleanup_ctx(vip->alloc_ctx); 885 } 886 static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) 887 { 888 /* 889 * Inititialize an empty control so VIP can inerithing controls 890 * from ADV7180 891 */ 892 v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); 893 894 vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; 895 if (vip->ctrl_hdl.error) { 896 int err = vip->ctrl_hdl.error; 897 898 v4l2_ctrl_handler_free(&vip->ctrl_hdl); 899 return err; 900 } 901 902 return 0; 903 } 904 905 /** 906 * vip_gpio_reserve - reserve gpio pin 907 * @dev: device 908 * @pin: GPIO pin number 909 * @dir: direction, input or output 910 * @name: GPIO pin name 911 * 912 */ 913 static int vip_gpio_reserve(struct device *dev, int pin, int dir, 914 const char *name) 915 { 916 int ret; 917 918 if (pin == -1) 919 return 0; 920 921 ret = gpio_request(pin, name); 922 if (ret) { 923 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); 924 return ret; 925 } 926 927 ret = gpio_direction_output(pin, dir); 928 if (ret) { 929 dev_err(dev, "Failed to set direction for pin %d (%s)\n", 930 pin, name); 931 gpio_free(pin); 932 return ret; 933 } 934 935 ret = gpio_export(pin, false); 936 if (ret) { 937 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); 938 gpio_free(pin); 939 return ret; 940 } 941 942 return 0; 943 } 944 945 /** 946 * vip_gpio_release - release gpio pin 947 * @dev: device 948 * @pin: GPIO pin number 949 * @name: GPIO pin name 950 * 951 */ 952 static void vip_gpio_release(struct device *dev, int pin, const char *name) 953 { 954 if (pin != -1) { 955 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); 956 gpio_unexport(pin); 957 gpio_free(pin); 958 } 959 } 960 961 /** 962 * sta2x11_vip_init_one - init one instance of video device 963 * @pdev: PCI device 964 * @ent: (not used) 965 * 966 * allocate reset pins for DAC. 967 * Reset video DAC, this is done via reset line. 968 * allocate memory for managing device 969 * request interrupt 970 * map IO region 971 * register device 972 * find and initialize video DAC 973 * 974 * return value: 0, no error 975 * 976 * -ENOMEM, no memory 977 * 978 * -ENODEV, device could not be detected or registered 979 */ 980 static int sta2x11_vip_init_one(struct pci_dev *pdev, 981 const struct pci_device_id *ent) 982 { 983 int ret; 984 struct sta2x11_vip *vip; 985 struct vip_config *config; 986 987 /* Check if hardware support 26-bit DMA */ 988 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { 989 dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); 990 return -EINVAL; 991 } 992 /* Enable PCI */ 993 ret = pci_enable_device(pdev); 994 if (ret) 995 return ret; 996 997 /* Get VIP platform data */ 998 config = dev_get_platdata(&pdev->dev); 999 if (!config) { 1000 dev_info(&pdev->dev, "VIP slot disabled\n"); 1001 ret = -EINVAL; 1002 goto disable; 1003 } 1004 1005 /* Power configuration */ 1006 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, 1007 config->pwr_name); 1008 if (ret) 1009 goto disable; 1010 1011 if (config->reset_pin >= 0) { 1012 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, 1013 config->reset_name); 1014 if (ret) { 1015 vip_gpio_release(&pdev->dev, config->pwr_pin, 1016 config->pwr_name); 1017 goto disable; 1018 } 1019 } 1020 if (config->pwr_pin != -1) { 1021 /* Datasheet says 5ms between PWR and RST */ 1022 usleep_range(5000, 25000); 1023 ret = gpio_direction_output(config->pwr_pin, 1); 1024 } 1025 1026 if (config->reset_pin != -1) { 1027 /* Datasheet says 5ms between PWR and RST */ 1028 usleep_range(5000, 25000); 1029 ret = gpio_direction_output(config->reset_pin, 1); 1030 } 1031 usleep_range(5000, 25000); 1032 1033 /* Allocate a new VIP instance */ 1034 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); 1035 if (!vip) { 1036 ret = -ENOMEM; 1037 goto release_gpios; 1038 } 1039 vip->pdev = pdev; 1040 vip->std = V4L2_STD_PAL; 1041 vip->format = formats_50[0]; 1042 vip->config = config; 1043 1044 ret = sta2x11_vip_init_controls(vip); 1045 if (ret) 1046 goto free_mem; 1047 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); 1048 if (ret) 1049 goto free_mem; 1050 1051 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", 1052 (unsigned long)pci_resource_start(pdev, 0), 1053 (unsigned long)pci_resource_len(pdev, 0), pdev->irq); 1054 1055 pci_set_master(pdev); 1056 1057 ret = pci_request_regions(pdev, KBUILD_MODNAME); 1058 if (ret) 1059 goto unreg; 1060 1061 vip->iomem = pci_iomap(pdev, 0, 0x100); 1062 if (!vip->iomem) { 1063 ret = -ENOMEM; 1064 goto release; 1065 } 1066 1067 pci_enable_msi(pdev); 1068 1069 /* Initialize buffer */ 1070 ret = sta2x11_vip_init_buffer(vip); 1071 if (ret) 1072 goto unmap; 1073 1074 spin_lock_init(&vip->slock); 1075 1076 ret = request_irq(pdev->irq, 1077 (irq_handler_t) vip_irq, 1078 IRQF_SHARED, KBUILD_MODNAME, vip); 1079 if (ret) { 1080 dev_err(&pdev->dev, "request_irq failed\n"); 1081 ret = -ENODEV; 1082 goto release_buf; 1083 } 1084 1085 /* Alloc, initialize and register video device */ 1086 vip->video_dev = video_device_alloc(); 1087 if (!vip->video_dev) { 1088 ret = -ENOMEM; 1089 goto release_irq; 1090 } 1091 1092 vip->video_dev = &video_dev_template; 1093 vip->video_dev->v4l2_dev = &vip->v4l2_dev; 1094 vip->video_dev->queue = &vip->vb_vidq; 1095 video_set_drvdata(vip->video_dev, vip); 1096 1097 ret = video_register_device(vip->video_dev, VFL_TYPE_GRABBER, -1); 1098 if (ret) 1099 goto vrelease; 1100 1101 /* Get ADV7180 subdevice */ 1102 vip->adapter = i2c_get_adapter(vip->config->i2c_id); 1103 if (!vip->adapter) { 1104 ret = -ENODEV; 1105 dev_err(&pdev->dev, "no I2C adapter found\n"); 1106 goto vunreg; 1107 } 1108 1109 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, 1110 "adv7180", vip->config->i2c_addr, 1111 NULL); 1112 if (!vip->decoder) { 1113 ret = -ENODEV; 1114 dev_err(&pdev->dev, "no decoder found\n"); 1115 goto vunreg; 1116 } 1117 1118 i2c_put_adapter(vip->adapter); 1119 v4l2_subdev_call(vip->decoder, core, init, 0); 1120 1121 sta2x11_vip_init_register(vip); 1122 1123 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); 1124 return 0; 1125 1126 vunreg: 1127 video_set_drvdata(vip->video_dev, NULL); 1128 vrelease: 1129 if (video_is_registered(vip->video_dev)) 1130 video_unregister_device(vip->video_dev); 1131 else 1132 video_device_release(vip->video_dev); 1133 release_irq: 1134 free_irq(pdev->irq, vip); 1135 release_buf: 1136 sta2x11_vip_release_buffer(vip); 1137 pci_disable_msi(pdev); 1138 unmap: 1139 vb2_queue_release(&vip->vb_vidq); 1140 pci_iounmap(pdev, vip->iomem); 1141 release: 1142 pci_release_regions(pdev); 1143 unreg: 1144 v4l2_device_unregister(&vip->v4l2_dev); 1145 free_mem: 1146 kfree(vip); 1147 release_gpios: 1148 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); 1149 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); 1150 disable: 1151 /* 1152 * do not call pci_disable_device on sta2x11 because it break all 1153 * other Bus masters on this EP 1154 */ 1155 return ret; 1156 } 1157 1158 /** 1159 * sta2x11_vip_remove_one - release device 1160 * @pdev: PCI device 1161 * 1162 * Undo everything done in .._init_one 1163 * 1164 * unregister video device 1165 * free interrupt 1166 * unmap ioadresses 1167 * free memory 1168 * free GPIO pins 1169 */ 1170 static void sta2x11_vip_remove_one(struct pci_dev *pdev) 1171 { 1172 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1173 struct sta2x11_vip *vip = 1174 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1175 1176 sta2x11_vip_clear_register(vip); 1177 1178 video_set_drvdata(vip->video_dev, NULL); 1179 video_unregister_device(vip->video_dev); 1180 /*do not call video_device_release() here, is already done */ 1181 free_irq(pdev->irq, vip); 1182 pci_disable_msi(pdev); 1183 vb2_queue_release(&vip->vb_vidq); 1184 pci_iounmap(pdev, vip->iomem); 1185 pci_release_regions(pdev); 1186 1187 v4l2_device_unregister(&vip->v4l2_dev); 1188 1189 vip_gpio_release(&pdev->dev, vip->config->pwr_pin, 1190 vip->config->pwr_name); 1191 vip_gpio_release(&pdev->dev, vip->config->reset_pin, 1192 vip->config->reset_name); 1193 1194 kfree(vip); 1195 /* 1196 * do not call pci_disable_device on sta2x11 because it break all 1197 * other Bus masters on this EP 1198 */ 1199 } 1200 1201 #ifdef CONFIG_PM 1202 1203 /** 1204 * sta2x11_vip_suspend - set device into power save mode 1205 * @pdev: PCI device 1206 * @state: new state of device 1207 * 1208 * all relevant registers are saved and an attempt to set a new state is made. 1209 * 1210 * return value: 0 always indicate success, 1211 * even if device could not be disabled. (workaround for hardware problem) 1212 */ 1213 static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state) 1214 { 1215 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1216 struct sta2x11_vip *vip = 1217 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1218 unsigned long flags; 1219 int i; 1220 1221 spin_lock_irqsave(&vip->slock, flags); 1222 vip->register_save_area[0] = reg_read(vip, DVP_CTL); 1223 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); 1224 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); 1225 reg_write(vip, DVP_ITM, 0); 1226 for (i = 1; i < SAVE_COUNT; i++) 1227 vip->register_save_area[i] = reg_read(vip, 4 * i); 1228 for (i = 0; i < AUX_COUNT; i++) 1229 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = 1230 reg_read(vip, registers_to_save[i]); 1231 spin_unlock_irqrestore(&vip->slock, flags); 1232 /* save pci state */ 1233 pci_save_state(pdev); 1234 if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) { 1235 /* 1236 * do not call pci_disable_device on sta2x11 because it 1237 * break all other Bus masters on this EP 1238 */ 1239 vip->disabled = 1; 1240 } 1241 1242 pr_info("VIP: suspend\n"); 1243 return 0; 1244 } 1245 1246 /** 1247 * sta2x11_vip_resume - resume device operation 1248 * @pdev : PCI device 1249 * 1250 * re-enable device, set PCI state to powered and restore registers. 1251 * resume normal device operation afterwards. 1252 * 1253 * return value: 0, no error. 1254 * 1255 * other, could not set device to power on state. 1256 */ 1257 static int sta2x11_vip_resume(struct pci_dev *pdev) 1258 { 1259 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1260 struct sta2x11_vip *vip = 1261 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1262 unsigned long flags; 1263 int ret, i; 1264 1265 pr_info("VIP: resume\n"); 1266 /* restore pci state */ 1267 if (vip->disabled) { 1268 ret = pci_enable_device(pdev); 1269 if (ret) { 1270 pr_warn("VIP: Can't enable device.\n"); 1271 return ret; 1272 } 1273 vip->disabled = 0; 1274 } 1275 ret = pci_set_power_state(pdev, PCI_D0); 1276 if (ret) { 1277 /* 1278 * do not call pci_disable_device on sta2x11 because it 1279 * break all other Bus masters on this EP 1280 */ 1281 pr_warn("VIP: Can't enable device.\n"); 1282 vip->disabled = 1; 1283 return ret; 1284 } 1285 1286 pci_restore_state(pdev); 1287 1288 spin_lock_irqsave(&vip->slock, flags); 1289 for (i = 1; i < SAVE_COUNT; i++) 1290 reg_write(vip, 4 * i, vip->register_save_area[i]); 1291 for (i = 0; i < AUX_COUNT; i++) 1292 reg_write(vip, registers_to_save[i], 1293 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); 1294 reg_write(vip, DVP_CTL, vip->register_save_area[0]); 1295 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); 1296 spin_unlock_irqrestore(&vip->slock, flags); 1297 return 0; 1298 } 1299 1300 #endif 1301 1302 static const struct pci_device_id sta2x11_vip_pci_tbl[] = { 1303 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, 1304 {0,} 1305 }; 1306 1307 static struct pci_driver sta2x11_vip_driver = { 1308 .name = KBUILD_MODNAME, 1309 .probe = sta2x11_vip_init_one, 1310 .remove = sta2x11_vip_remove_one, 1311 .id_table = sta2x11_vip_pci_tbl, 1312 #ifdef CONFIG_PM 1313 .suspend = sta2x11_vip_suspend, 1314 .resume = sta2x11_vip_resume, 1315 #endif 1316 }; 1317 1318 static int __init sta2x11_vip_init_module(void) 1319 { 1320 return pci_register_driver(&sta2x11_vip_driver); 1321 } 1322 1323 static void __exit sta2x11_vip_exit_module(void) 1324 { 1325 pci_unregister_driver(&sta2x11_vip_driver); 1326 } 1327 1328 #ifdef MODULE 1329 module_init(sta2x11_vip_init_module); 1330 module_exit(sta2x11_vip_exit_module); 1331 #else 1332 late_initcall_sync(sta2x11_vip_init_module); 1333 #endif 1334 1335 MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); 1336 MODULE_AUTHOR("Wind River"); 1337 MODULE_LICENSE("GPL v2"); 1338 MODULE_SUPPORTED_DEVICE("sta2x11 video input"); 1339 MODULE_VERSION(DRV_VERSION); 1340 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); 1341