1 /* 2 * This is the driver for the STA2x11 Video Input Port. 3 * 4 * Copyright (C) 2012 ST Microelectronics 5 * author: Federico Vaga <federico.vaga@gmail.com> 6 * Copyright (C) 2010 WindRiver Systems, Inc. 7 * authors: Andreas Kies <andreas.kies@windriver.com> 8 * Vlad Lungu <vlad.lungu@windriver.com> 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms and conditions of the GNU General Public License, 12 * version 2, as published by the Free Software Foundation. 13 * 14 * This program is distributed in the hope it will be useful, but WITHOUT 15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 17 * more details. 18 * 19 * You should have received a copy of the GNU General Public License along with 20 * this program; if not, write to the Free Software Foundation, Inc., 21 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 22 * 23 * The full GNU General Public License is included in this distribution in 24 * the file called "COPYING". 25 * 26 */ 27 28 #include <linux/types.h> 29 #include <linux/kernel.h> 30 #include <linux/module.h> 31 #include <linux/init.h> 32 #include <linux/videodev2.h> 33 #include <linux/kmod.h> 34 #include <linux/pci.h> 35 #include <linux/interrupt.h> 36 #include <linux/io.h> 37 #include <linux/gpio.h> 38 #include <linux/i2c.h> 39 #include <linux/delay.h> 40 #include <media/v4l2-common.h> 41 #include <media/v4l2-device.h> 42 #include <media/v4l2-ctrls.h> 43 #include <media/v4l2-ioctl.h> 44 #include <media/v4l2-fh.h> 45 #include <media/v4l2-event.h> 46 #include <media/videobuf2-dma-contig.h> 47 48 #include "sta2x11_vip.h" 49 50 #define DRV_VERSION "1.3" 51 52 #ifndef PCI_DEVICE_ID_STMICRO_VIP 53 #define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D 54 #endif 55 56 #define MAX_FRAMES 4 57 58 /*Register offsets*/ 59 #define DVP_CTL 0x00 60 #define DVP_TFO 0x04 61 #define DVP_TFS 0x08 62 #define DVP_BFO 0x0C 63 #define DVP_BFS 0x10 64 #define DVP_VTP 0x14 65 #define DVP_VBP 0x18 66 #define DVP_VMP 0x1C 67 #define DVP_ITM 0x98 68 #define DVP_ITS 0x9C 69 #define DVP_STA 0xA0 70 #define DVP_HLFLN 0xA8 71 #define DVP_RGB 0xC0 72 #define DVP_PKZ 0xF0 73 74 /*Register fields*/ 75 #define DVP_CTL_ENA 0x00000001 76 #define DVP_CTL_RST 0x80000000 77 #define DVP_CTL_DIS (~0x00040001) 78 79 #define DVP_IT_VSB 0x00000008 80 #define DVP_IT_VST 0x00000010 81 #define DVP_IT_FIFO 0x00000020 82 83 #define DVP_HLFLN_SD 0x00000001 84 85 #define SAVE_COUNT 8 86 #define AUX_COUNT 3 87 #define IRQ_COUNT 1 88 89 90 struct vip_buffer { 91 struct vb2_v4l2_buffer vb; 92 struct list_head list; 93 dma_addr_t dma; 94 }; 95 static inline struct vip_buffer *to_vip_buffer(struct vb2_v4l2_buffer *vb2) 96 { 97 return container_of(vb2, struct vip_buffer, vb); 98 } 99 100 /** 101 * struct sta2x11_vip - All internal data for one instance of device 102 * @v4l2_dev: device registered in v4l layer 103 * @video_dev: properties of our device 104 * @pdev: PCI device 105 * @adapter: contains I2C adapter information 106 * @register_save_area: All relevant register are saved here during suspend 107 * @decoder: contains information about video DAC 108 * @ctrl_hdl: handler for control framework 109 * @format: pixel format, fixed UYVY 110 * @std: video standard (e.g. PAL/NTSC) 111 * @input: input line for video signal ( 0 or 1 ) 112 * @disabled: Device is in power down state 113 * @slock: for excluse acces of registers 114 * @vb_vidq: queue maintained by videobuf2 layer 115 * @buffer_list: list of buffer in use 116 * @sequence: sequence number of acquired buffer 117 * @active: current active buffer 118 * @lock: used in videobuf2 callback 119 * @tcount: Number of top frames 120 * @bcount: Number of bottom frames 121 * @overflow: Number of FIFO overflows 122 * @iomem: hardware base address 123 * @config: I2C and gpio config from platform 124 * 125 * All non-local data is accessed via this structure. 126 */ 127 struct sta2x11_vip { 128 struct v4l2_device v4l2_dev; 129 struct video_device video_dev; 130 struct pci_dev *pdev; 131 struct i2c_adapter *adapter; 132 unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT]; 133 struct v4l2_subdev *decoder; 134 struct v4l2_ctrl_handler ctrl_hdl; 135 136 137 struct v4l2_pix_format format; 138 v4l2_std_id std; 139 unsigned int input; 140 int disabled; 141 spinlock_t slock; 142 143 struct vb2_queue vb_vidq; 144 struct list_head buffer_list; 145 unsigned int sequence; 146 struct vip_buffer *active; /* current active buffer */ 147 spinlock_t lock; /* Used in videobuf2 callback */ 148 149 /* Interrupt counters */ 150 int tcount, bcount; 151 int overflow; 152 153 void __iomem *iomem; /* I/O Memory */ 154 struct vip_config *config; 155 }; 156 157 static const unsigned int registers_to_save[AUX_COUNT] = { 158 DVP_HLFLN, DVP_RGB, DVP_PKZ 159 }; 160 161 static struct v4l2_pix_format formats_50[] = { 162 { /*PAL interlaced */ 163 .width = 720, 164 .height = 576, 165 .pixelformat = V4L2_PIX_FMT_UYVY, 166 .field = V4L2_FIELD_INTERLACED, 167 .bytesperline = 720 * 2, 168 .sizeimage = 720 * 2 * 576, 169 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 170 { /*PAL top */ 171 .width = 720, 172 .height = 288, 173 .pixelformat = V4L2_PIX_FMT_UYVY, 174 .field = V4L2_FIELD_TOP, 175 .bytesperline = 720 * 2, 176 .sizeimage = 720 * 2 * 288, 177 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 178 { /*PAL bottom */ 179 .width = 720, 180 .height = 288, 181 .pixelformat = V4L2_PIX_FMT_UYVY, 182 .field = V4L2_FIELD_BOTTOM, 183 .bytesperline = 720 * 2, 184 .sizeimage = 720 * 2 * 288, 185 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 186 187 }; 188 189 static struct v4l2_pix_format formats_60[] = { 190 { /*NTSC interlaced */ 191 .width = 720, 192 .height = 480, 193 .pixelformat = V4L2_PIX_FMT_UYVY, 194 .field = V4L2_FIELD_INTERLACED, 195 .bytesperline = 720 * 2, 196 .sizeimage = 720 * 2 * 480, 197 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 198 { /*NTSC top */ 199 .width = 720, 200 .height = 240, 201 .pixelformat = V4L2_PIX_FMT_UYVY, 202 .field = V4L2_FIELD_TOP, 203 .bytesperline = 720 * 2, 204 .sizeimage = 720 * 2 * 240, 205 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 206 { /*NTSC bottom */ 207 .width = 720, 208 .height = 240, 209 .pixelformat = V4L2_PIX_FMT_UYVY, 210 .field = V4L2_FIELD_BOTTOM, 211 .bytesperline = 720 * 2, 212 .sizeimage = 720 * 2 * 240, 213 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 214 }; 215 216 /* Write VIP register */ 217 static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val) 218 { 219 iowrite32((val), (vip->iomem)+(reg)); 220 } 221 /* Read VIP register */ 222 static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg) 223 { 224 return ioread32((vip->iomem)+(reg)); 225 } 226 /* Start DMA acquisition */ 227 static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf) 228 { 229 unsigned long offset = 0; 230 231 if (vip->format.field == V4L2_FIELD_INTERLACED) 232 offset = vip->format.width * 2; 233 234 spin_lock_irq(&vip->slock); 235 /* Enable acquisition */ 236 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) | DVP_CTL_ENA); 237 /* Set Top and Bottom Field memory address */ 238 reg_write(vip, DVP_VTP, (u32)vip_buf->dma); 239 reg_write(vip, DVP_VBP, (u32)vip_buf->dma + offset); 240 spin_unlock_irq(&vip->slock); 241 } 242 243 /* Fetch the next buffer to activate */ 244 static void vip_active_buf_next(struct sta2x11_vip *vip) 245 { 246 /* Get the next buffer */ 247 spin_lock(&vip->lock); 248 if (list_empty(&vip->buffer_list)) {/* No available buffer */ 249 spin_unlock(&vip->lock); 250 return; 251 } 252 vip->active = list_first_entry(&vip->buffer_list, 253 struct vip_buffer, 254 list); 255 /* Reset Top and Bottom counter */ 256 vip->tcount = 0; 257 vip->bcount = 0; 258 spin_unlock(&vip->lock); 259 if (vb2_is_streaming(&vip->vb_vidq)) { /* streaming is on */ 260 start_dma(vip, vip->active); /* start dma capture */ 261 } 262 } 263 264 265 /* Videobuf2 Operations */ 266 static int queue_setup(struct vb2_queue *vq, 267 unsigned int *nbuffers, unsigned int *nplanes, 268 unsigned int sizes[], struct device *alloc_devs[]) 269 { 270 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 271 272 if (!(*nbuffers) || *nbuffers < MAX_FRAMES) 273 *nbuffers = MAX_FRAMES; 274 275 *nplanes = 1; 276 sizes[0] = vip->format.sizeimage; 277 278 vip->sequence = 0; 279 vip->active = NULL; 280 vip->tcount = 0; 281 vip->bcount = 0; 282 283 return 0; 284 }; 285 static int buffer_init(struct vb2_buffer *vb) 286 { 287 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 288 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 289 290 vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, 0); 291 INIT_LIST_HEAD(&vip_buf->list); 292 return 0; 293 } 294 295 static int buffer_prepare(struct vb2_buffer *vb) 296 { 297 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 298 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 299 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 300 unsigned long size; 301 302 size = vip->format.sizeimage; 303 if (vb2_plane_size(vb, 0) < size) { 304 v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n", 305 vb2_plane_size(vb, 0), size); 306 return -EINVAL; 307 } 308 309 vb2_set_plane_payload(&vip_buf->vb.vb2_buf, 0, size); 310 311 return 0; 312 } 313 static void buffer_queue(struct vb2_buffer *vb) 314 { 315 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 316 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 317 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 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 vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 333 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 334 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 335 336 /* Buffer handled, remove it from the list */ 337 spin_lock(&vip->lock); 338 list_del_init(&vip_buf->list); 339 spin_unlock(&vip->lock); 340 341 if (vb2_is_streaming(vb->vb2_queue)) 342 vip_active_buf_next(vip); 343 } 344 345 static 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 */ 361 static void 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, VB2_BUF_STATE_ERROR); 375 list_del(&vip_buf->list); 376 } 377 spin_unlock(&vip->lock); 378 } 379 380 static const struct vb2_ops vip_video_qops = { 381 .queue_setup = queue_setup, 382 .buf_init = buffer_init, 383 .buf_prepare = buffer_prepare, 384 .buf_finish = buffer_finish, 385 .buf_queue = buffer_queue, 386 .start_streaming = start_streaming, 387 .stop_streaming = stop_streaming, 388 }; 389 390 391 /* File Operations */ 392 static const struct v4l2_file_operations vip_fops = { 393 .owner = THIS_MODULE, 394 .open = v4l2_fh_open, 395 .release = vb2_fop_release, 396 .unlocked_ioctl = video_ioctl2, 397 .read = vb2_fop_read, 398 .mmap = vb2_fop_mmap, 399 .poll = vb2_fop_poll 400 }; 401 402 403 /** 404 * vidioc_querycap - return capabilities of device 405 * @file: descriptor of device 406 * @cap: contains return values 407 * @priv: unused 408 * 409 * the capabilities of the device are returned 410 * 411 * return value: 0, no error. 412 */ 413 static 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 * @priv: unused 434 * 435 * the video standard is set 436 * 437 * return value: 0, no error. 438 * 439 * -EIO, no input signal detected 440 * 441 * other, returned from video DAC. 442 */ 443 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) 444 { 445 struct sta2x11_vip *vip = video_drvdata(file); 446 447 /* 448 * This is here for backwards compatibility only. 449 * The use of V4L2_STD_ALL to trigger a querystd is non-standard. 450 */ 451 if (std == V4L2_STD_ALL) { 452 v4l2_subdev_call(vip->decoder, video, querystd, &std); 453 if (std == V4L2_STD_UNKNOWN) 454 return -EIO; 455 } 456 457 if (vip->std != std) { 458 vip->std = std; 459 if (V4L2_STD_525_60 & std) 460 vip->format = formats_60[0]; 461 else 462 vip->format = formats_50[0]; 463 } 464 465 return v4l2_subdev_call(vip->decoder, video, s_std, std); 466 } 467 468 /** 469 * vidioc_g_std - get video standard 470 * @file: descriptor of device 471 * @priv: unused 472 * @std: contains return values 473 * 474 * the current video standard is returned 475 * 476 * return value: 0, no error. 477 */ 478 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) 479 { 480 struct sta2x11_vip *vip = video_drvdata(file); 481 482 *std = vip->std; 483 return 0; 484 } 485 486 /** 487 * vidioc_querystd - get possible video standards 488 * @file: descriptor of device 489 * @priv: unused 490 * @std: contains return values 491 * 492 * all possible video standards are returned 493 * 494 * return value: delivered by video DAC routine. 495 */ 496 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) 497 { 498 struct sta2x11_vip *vip = video_drvdata(file); 499 500 return v4l2_subdev_call(vip->decoder, video, querystd, std); 501 } 502 503 static int vidioc_enum_input(struct file *file, void *priv, 504 struct v4l2_input *inp) 505 { 506 if (inp->index > 1) 507 return -EINVAL; 508 509 inp->type = V4L2_INPUT_TYPE_CAMERA; 510 inp->std = V4L2_STD_ALL; 511 sprintf(inp->name, "Camera %u", inp->index); 512 513 return 0; 514 } 515 516 /** 517 * vidioc_s_input - set input line 518 * @file: descriptor of device 519 * @priv: unused 520 * @i: new input line number 521 * 522 * the current active input line is set 523 * 524 * return value: 0, no error. 525 * 526 * -EINVAL, line number out of range 527 */ 528 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 529 { 530 struct sta2x11_vip *vip = video_drvdata(file); 531 int ret; 532 533 if (i > 1) 534 return -EINVAL; 535 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); 536 537 if (!ret) 538 vip->input = i; 539 540 return 0; 541 } 542 543 /** 544 * vidioc_g_input - return input line 545 * @file: descriptor of device 546 * @priv: unused 547 * @i: returned input line number 548 * 549 * the current active input line is returned 550 * 551 * return value: always 0. 552 */ 553 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 554 { 555 struct sta2x11_vip *vip = video_drvdata(file); 556 557 *i = vip->input; 558 return 0; 559 } 560 561 /** 562 * vidioc_enum_fmt_vid_cap - return video capture format 563 * @file: descriptor of device 564 * @priv: unused 565 * @f: returned format information 566 * 567 * returns name and format of video capture 568 * Only UYVY is supported by hardware. 569 * 570 * return value: always 0. 571 */ 572 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 573 struct v4l2_fmtdesc *f) 574 { 575 576 if (f->index != 0) 577 return -EINVAL; 578 579 strcpy(f->description, "4:2:2, packed, UYVY"); 580 f->pixelformat = V4L2_PIX_FMT_UYVY; 581 f->flags = 0; 582 return 0; 583 } 584 585 /** 586 * vidioc_try_fmt_vid_cap - set video capture format 587 * @file: descriptor of device 588 * @priv: unused 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 */ 601 static 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 return 0; 646 } 647 648 /** 649 * vidioc_s_fmt_vid_cap - set current video format parameters 650 * @file: descriptor of device 651 * @priv: unused 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 */ 659 static 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 * @priv: unused 720 * @f: contains format information 721 * 722 * returns current video format parameters 723 * 724 * return value: 0, always successful 725 */ 726 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 727 struct v4l2_format *f) 728 { 729 struct sta2x11_vip *vip = video_drvdata(file); 730 731 f->fmt.pix = vip->format; 732 733 return 0; 734 } 735 736 static const struct v4l2_ioctl_ops vip_ioctl_ops = { 737 .vidioc_querycap = vidioc_querycap, 738 /* FMT handling */ 739 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 740 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 741 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 742 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 743 /* Buffer handlers */ 744 .vidioc_create_bufs = vb2_ioctl_create_bufs, 745 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 746 .vidioc_reqbufs = vb2_ioctl_reqbufs, 747 .vidioc_querybuf = vb2_ioctl_querybuf, 748 .vidioc_qbuf = vb2_ioctl_qbuf, 749 .vidioc_dqbuf = vb2_ioctl_dqbuf, 750 /* Stream on/off */ 751 .vidioc_streamon = vb2_ioctl_streamon, 752 .vidioc_streamoff = vb2_ioctl_streamoff, 753 /* Standard handling */ 754 .vidioc_g_std = vidioc_g_std, 755 .vidioc_s_std = vidioc_s_std, 756 .vidioc_querystd = vidioc_querystd, 757 /* Input handling */ 758 .vidioc_enum_input = vidioc_enum_input, 759 .vidioc_g_input = vidioc_g_input, 760 .vidioc_s_input = vidioc_s_input, 761 /* Log status ioctl */ 762 .vidioc_log_status = v4l2_ctrl_log_status, 763 /* Event handling */ 764 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 765 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 766 }; 767 768 static const struct video_device video_dev_template = { 769 .name = KBUILD_MODNAME, 770 .release = video_device_release_empty, 771 .fops = &vip_fops, 772 .ioctl_ops = &vip_ioctl_ops, 773 .tvnorms = V4L2_STD_ALL, 774 }; 775 776 /** 777 * vip_irq - interrupt routine 778 * @irq: Number of interrupt ( not used, correct number is assumed ) 779 * @vip: local data structure containing all information 780 * 781 * check for both frame interrupts set ( top and bottom ). 782 * check FIFO overflow, but limit number of log messages after open. 783 * signal a complete buffer if done 784 * 785 * return value: IRQ_NONE, interrupt was not generated by VIP 786 * 787 * IRQ_HANDLED, interrupt done. 788 */ 789 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip) 790 { 791 unsigned int status; 792 793 status = reg_read(vip, DVP_ITS); 794 795 if (!status) /* No interrupt to handle */ 796 return IRQ_NONE; 797 798 if (status & DVP_IT_FIFO) 799 if (vip->overflow++ > 5) 800 pr_info("VIP: fifo overflow\n"); 801 802 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { 803 /* this is bad, we are too slow, hope the condition is gone 804 * on the next frame */ 805 return IRQ_HANDLED; 806 } 807 808 if (status & DVP_IT_VST) 809 if ((++vip->tcount) < 2) 810 return IRQ_HANDLED; 811 if (status & DVP_IT_VSB) { 812 vip->bcount++; 813 return IRQ_HANDLED; 814 } 815 816 if (vip->active) { /* Acquisition is over on this buffer */ 817 /* Disable acquisition */ 818 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 819 /* Remove the active buffer from the list */ 820 vip->active->vb.vb2_buf.timestamp = ktime_get_ns(); 821 vip->active->vb.sequence = vip->sequence++; 822 vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE); 823 } 824 825 return IRQ_HANDLED; 826 } 827 828 static void sta2x11_vip_init_register(struct sta2x11_vip *vip) 829 { 830 /* Register initialization */ 831 spin_lock_irq(&vip->slock); 832 /* Clean interrupt */ 833 reg_read(vip, DVP_ITS); 834 /* Enable Half Line per vertical */ 835 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); 836 /* Reset VIP control */ 837 reg_write(vip, DVP_CTL, DVP_CTL_RST); 838 /* Clear VIP control */ 839 reg_write(vip, DVP_CTL, 0); 840 spin_unlock_irq(&vip->slock); 841 } 842 static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) 843 { 844 spin_lock_irq(&vip->slock); 845 /* Disable interrupt */ 846 reg_write(vip, DVP_ITM, 0); 847 /* Reset VIP Control */ 848 reg_write(vip, DVP_CTL, DVP_CTL_RST); 849 /* Clear VIP Control */ 850 reg_write(vip, DVP_CTL, 0); 851 /* Clean VIP Interrupt */ 852 reg_read(vip, DVP_ITS); 853 spin_unlock_irq(&vip->slock); 854 } 855 static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) 856 { 857 int err; 858 859 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); 860 if (err) { 861 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); 862 return err; 863 } 864 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); 865 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 866 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; 867 vip->vb_vidq.drv_priv = vip; 868 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); 869 vip->vb_vidq.ops = &vip_video_qops; 870 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; 871 vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 872 vip->vb_vidq.dev = &vip->pdev->dev; 873 err = vb2_queue_init(&vip->vb_vidq); 874 if (err) 875 return err; 876 INIT_LIST_HEAD(&vip->buffer_list); 877 spin_lock_init(&vip->lock); 878 return 0; 879 } 880 881 static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) 882 { 883 /* 884 * Inititialize an empty control so VIP can inerithing controls 885 * from ADV7180 886 */ 887 v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); 888 889 vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; 890 if (vip->ctrl_hdl.error) { 891 int err = vip->ctrl_hdl.error; 892 893 v4l2_ctrl_handler_free(&vip->ctrl_hdl); 894 return err; 895 } 896 897 return 0; 898 } 899 900 /** 901 * vip_gpio_reserve - reserve gpio pin 902 * @dev: device 903 * @pin: GPIO pin number 904 * @dir: direction, input or output 905 * @name: GPIO pin name 906 * 907 */ 908 static int vip_gpio_reserve(struct device *dev, int pin, int dir, 909 const char *name) 910 { 911 int ret = -ENODEV; 912 913 if (!gpio_is_valid(pin)) 914 return ret; 915 916 ret = gpio_request(pin, name); 917 if (ret) { 918 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); 919 return ret; 920 } 921 922 ret = gpio_direction_output(pin, dir); 923 if (ret) { 924 dev_err(dev, "Failed to set direction for pin %d (%s)\n", 925 pin, name); 926 gpio_free(pin); 927 return ret; 928 } 929 930 ret = gpio_export(pin, false); 931 if (ret) { 932 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); 933 gpio_free(pin); 934 return ret; 935 } 936 937 return 0; 938 } 939 940 /** 941 * vip_gpio_release - release gpio pin 942 * @dev: device 943 * @pin: GPIO pin number 944 * @name: GPIO pin name 945 * 946 */ 947 static void vip_gpio_release(struct device *dev, int pin, const char *name) 948 { 949 if (gpio_is_valid(pin)) { 950 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); 951 gpio_unexport(pin); 952 gpio_free(pin); 953 } 954 } 955 956 /** 957 * sta2x11_vip_init_one - init one instance of video device 958 * @pdev: PCI device 959 * @ent: (not used) 960 * 961 * allocate reset pins for DAC. 962 * Reset video DAC, this is done via reset line. 963 * allocate memory for managing device 964 * request interrupt 965 * map IO region 966 * register device 967 * find and initialize video DAC 968 * 969 * return value: 0, no error 970 * 971 * -ENOMEM, no memory 972 * 973 * -ENODEV, device could not be detected or registered 974 */ 975 static int sta2x11_vip_init_one(struct pci_dev *pdev, 976 const struct pci_device_id *ent) 977 { 978 int ret; 979 struct sta2x11_vip *vip; 980 struct vip_config *config; 981 982 /* Check if hardware support 26-bit DMA */ 983 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { 984 dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); 985 return -EINVAL; 986 } 987 /* Enable PCI */ 988 ret = pci_enable_device(pdev); 989 if (ret) 990 return ret; 991 992 /* Get VIP platform data */ 993 config = dev_get_platdata(&pdev->dev); 994 if (!config) { 995 dev_info(&pdev->dev, "VIP slot disabled\n"); 996 ret = -EINVAL; 997 goto disable; 998 } 999 1000 /* Power configuration */ 1001 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, 1002 config->pwr_name); 1003 if (ret) 1004 goto disable; 1005 1006 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, 1007 config->reset_name); 1008 if (ret) { 1009 vip_gpio_release(&pdev->dev, config->pwr_pin, 1010 config->pwr_name); 1011 goto disable; 1012 } 1013 1014 if (gpio_is_valid(config->pwr_pin)) { 1015 /* Datasheet says 5ms between PWR and RST */ 1016 usleep_range(5000, 25000); 1017 gpio_direction_output(config->pwr_pin, 1); 1018 } 1019 1020 if (gpio_is_valid(config->reset_pin)) { 1021 /* Datasheet says 5ms between PWR and RST */ 1022 usleep_range(5000, 25000); 1023 gpio_direction_output(config->reset_pin, 1); 1024 } 1025 usleep_range(5000, 25000); 1026 1027 /* Allocate a new VIP instance */ 1028 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); 1029 if (!vip) { 1030 ret = -ENOMEM; 1031 goto release_gpios; 1032 } 1033 vip->pdev = pdev; 1034 vip->std = V4L2_STD_PAL; 1035 vip->format = formats_50[0]; 1036 vip->config = config; 1037 1038 ret = sta2x11_vip_init_controls(vip); 1039 if (ret) 1040 goto free_mem; 1041 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); 1042 if (ret) 1043 goto free_mem; 1044 1045 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", 1046 (unsigned long)pci_resource_start(pdev, 0), 1047 (unsigned long)pci_resource_len(pdev, 0), pdev->irq); 1048 1049 pci_set_master(pdev); 1050 1051 ret = pci_request_regions(pdev, KBUILD_MODNAME); 1052 if (ret) 1053 goto unreg; 1054 1055 vip->iomem = pci_iomap(pdev, 0, 0x100); 1056 if (!vip->iomem) { 1057 ret = -ENOMEM; 1058 goto release; 1059 } 1060 1061 pci_enable_msi(pdev); 1062 1063 /* Initialize buffer */ 1064 ret = sta2x11_vip_init_buffer(vip); 1065 if (ret) 1066 goto unmap; 1067 1068 spin_lock_init(&vip->slock); 1069 1070 ret = request_irq(pdev->irq, 1071 (irq_handler_t) vip_irq, 1072 IRQF_SHARED, KBUILD_MODNAME, vip); 1073 if (ret) { 1074 dev_err(&pdev->dev, "request_irq failed\n"); 1075 ret = -ENODEV; 1076 goto release_buf; 1077 } 1078 1079 /* Initialize and register video device */ 1080 vip->video_dev = video_dev_template; 1081 vip->video_dev.v4l2_dev = &vip->v4l2_dev; 1082 vip->video_dev.queue = &vip->vb_vidq; 1083 video_set_drvdata(&vip->video_dev, vip); 1084 1085 ret = video_register_device(&vip->video_dev, VFL_TYPE_GRABBER, -1); 1086 if (ret) 1087 goto vrelease; 1088 1089 /* Get ADV7180 subdevice */ 1090 vip->adapter = i2c_get_adapter(vip->config->i2c_id); 1091 if (!vip->adapter) { 1092 ret = -ENODEV; 1093 dev_err(&pdev->dev, "no I2C adapter found\n"); 1094 goto vunreg; 1095 } 1096 1097 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, 1098 "adv7180", vip->config->i2c_addr, 1099 NULL); 1100 if (!vip->decoder) { 1101 ret = -ENODEV; 1102 dev_err(&pdev->dev, "no decoder found\n"); 1103 goto vunreg; 1104 } 1105 1106 i2c_put_adapter(vip->adapter); 1107 v4l2_subdev_call(vip->decoder, core, init, 0); 1108 1109 sta2x11_vip_init_register(vip); 1110 1111 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); 1112 return 0; 1113 1114 vunreg: 1115 video_set_drvdata(&vip->video_dev, NULL); 1116 vrelease: 1117 video_unregister_device(&vip->video_dev); 1118 free_irq(pdev->irq, vip); 1119 release_buf: 1120 pci_disable_msi(pdev); 1121 unmap: 1122 vb2_queue_release(&vip->vb_vidq); 1123 pci_iounmap(pdev, vip->iomem); 1124 release: 1125 pci_release_regions(pdev); 1126 unreg: 1127 v4l2_device_unregister(&vip->v4l2_dev); 1128 free_mem: 1129 kfree(vip); 1130 release_gpios: 1131 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); 1132 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); 1133 disable: 1134 /* 1135 * do not call pci_disable_device on sta2x11 because it break all 1136 * other Bus masters on this EP 1137 */ 1138 return ret; 1139 } 1140 1141 /** 1142 * sta2x11_vip_remove_one - release device 1143 * @pdev: PCI device 1144 * 1145 * Undo everything done in .._init_one 1146 * 1147 * unregister video device 1148 * free interrupt 1149 * unmap ioadresses 1150 * free memory 1151 * free GPIO pins 1152 */ 1153 static void sta2x11_vip_remove_one(struct pci_dev *pdev) 1154 { 1155 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1156 struct sta2x11_vip *vip = 1157 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1158 1159 sta2x11_vip_clear_register(vip); 1160 1161 video_set_drvdata(&vip->video_dev, NULL); 1162 video_unregister_device(&vip->video_dev); 1163 free_irq(pdev->irq, vip); 1164 pci_disable_msi(pdev); 1165 vb2_queue_release(&vip->vb_vidq); 1166 pci_iounmap(pdev, vip->iomem); 1167 pci_release_regions(pdev); 1168 1169 v4l2_device_unregister(&vip->v4l2_dev); 1170 1171 vip_gpio_release(&pdev->dev, vip->config->pwr_pin, 1172 vip->config->pwr_name); 1173 vip_gpio_release(&pdev->dev, vip->config->reset_pin, 1174 vip->config->reset_name); 1175 1176 kfree(vip); 1177 /* 1178 * do not call pci_disable_device on sta2x11 because it break all 1179 * other Bus masters on this EP 1180 */ 1181 } 1182 1183 #ifdef CONFIG_PM 1184 1185 /** 1186 * sta2x11_vip_suspend - set device into power save mode 1187 * @pdev: PCI device 1188 * @state: new state of device 1189 * 1190 * all relevant registers are saved and an attempt to set a new state is made. 1191 * 1192 * return value: 0 always indicate success, 1193 * even if device could not be disabled. (workaround for hardware problem) 1194 */ 1195 static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state) 1196 { 1197 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1198 struct sta2x11_vip *vip = 1199 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1200 unsigned long flags; 1201 int i; 1202 1203 spin_lock_irqsave(&vip->slock, flags); 1204 vip->register_save_area[0] = reg_read(vip, DVP_CTL); 1205 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); 1206 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); 1207 reg_write(vip, DVP_ITM, 0); 1208 for (i = 1; i < SAVE_COUNT; i++) 1209 vip->register_save_area[i] = reg_read(vip, 4 * i); 1210 for (i = 0; i < AUX_COUNT; i++) 1211 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = 1212 reg_read(vip, registers_to_save[i]); 1213 spin_unlock_irqrestore(&vip->slock, flags); 1214 /* save pci state */ 1215 pci_save_state(pdev); 1216 if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) { 1217 /* 1218 * do not call pci_disable_device on sta2x11 because it 1219 * break all other Bus masters on this EP 1220 */ 1221 vip->disabled = 1; 1222 } 1223 1224 pr_info("VIP: suspend\n"); 1225 return 0; 1226 } 1227 1228 /** 1229 * sta2x11_vip_resume - resume device operation 1230 * @pdev : PCI device 1231 * 1232 * re-enable device, set PCI state to powered and restore registers. 1233 * resume normal device operation afterwards. 1234 * 1235 * return value: 0, no error. 1236 * 1237 * other, could not set device to power on state. 1238 */ 1239 static int sta2x11_vip_resume(struct pci_dev *pdev) 1240 { 1241 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1242 struct sta2x11_vip *vip = 1243 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1244 unsigned long flags; 1245 int ret, i; 1246 1247 pr_info("VIP: resume\n"); 1248 /* restore pci state */ 1249 if (vip->disabled) { 1250 ret = pci_enable_device(pdev); 1251 if (ret) { 1252 pr_warn("VIP: Can't enable device.\n"); 1253 return ret; 1254 } 1255 vip->disabled = 0; 1256 } 1257 ret = pci_set_power_state(pdev, PCI_D0); 1258 if (ret) { 1259 /* 1260 * do not call pci_disable_device on sta2x11 because it 1261 * break all other Bus masters on this EP 1262 */ 1263 pr_warn("VIP: Can't enable device.\n"); 1264 vip->disabled = 1; 1265 return ret; 1266 } 1267 1268 pci_restore_state(pdev); 1269 1270 spin_lock_irqsave(&vip->slock, flags); 1271 for (i = 1; i < SAVE_COUNT; i++) 1272 reg_write(vip, 4 * i, vip->register_save_area[i]); 1273 for (i = 0; i < AUX_COUNT; i++) 1274 reg_write(vip, registers_to_save[i], 1275 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); 1276 reg_write(vip, DVP_CTL, vip->register_save_area[0]); 1277 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); 1278 spin_unlock_irqrestore(&vip->slock, flags); 1279 return 0; 1280 } 1281 1282 #endif 1283 1284 static const struct pci_device_id sta2x11_vip_pci_tbl[] = { 1285 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, 1286 {0,} 1287 }; 1288 1289 static struct pci_driver sta2x11_vip_driver = { 1290 .name = KBUILD_MODNAME, 1291 .probe = sta2x11_vip_init_one, 1292 .remove = sta2x11_vip_remove_one, 1293 .id_table = sta2x11_vip_pci_tbl, 1294 #ifdef CONFIG_PM 1295 .suspend = sta2x11_vip_suspend, 1296 .resume = sta2x11_vip_resume, 1297 #endif 1298 }; 1299 1300 static int __init sta2x11_vip_init_module(void) 1301 { 1302 return pci_register_driver(&sta2x11_vip_driver); 1303 } 1304 1305 static void __exit sta2x11_vip_exit_module(void) 1306 { 1307 pci_unregister_driver(&sta2x11_vip_driver); 1308 } 1309 1310 #ifdef MODULE 1311 module_init(sta2x11_vip_init_module); 1312 module_exit(sta2x11_vip_exit_module); 1313 #else 1314 late_initcall_sync(sta2x11_vip_init_module); 1315 #endif 1316 1317 MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); 1318 MODULE_AUTHOR("Wind River"); 1319 MODULE_LICENSE("GPL v2"); 1320 MODULE_SUPPORTED_DEVICE("sta2x11 video input"); 1321 MODULE_VERSION(DRV_VERSION); 1322 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); 1323