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 * @v4l_lock: serialize its video4linux ioctls 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_queue vb_vidq; 145 struct list_head buffer_list; 146 unsigned int sequence; 147 struct vip_buffer *active; /* current active buffer */ 148 spinlock_t lock; /* Used in videobuf2 callback */ 149 struct mutex v4l_lock; 150 151 /* Interrupt counters */ 152 int tcount, bcount; 153 int overflow; 154 155 void __iomem *iomem; /* I/O Memory */ 156 struct vip_config *config; 157 }; 158 159 static const unsigned int registers_to_save[AUX_COUNT] = { 160 DVP_HLFLN, DVP_RGB, DVP_PKZ 161 }; 162 163 static struct v4l2_pix_format formats_50[] = { 164 { /*PAL interlaced */ 165 .width = 720, 166 .height = 576, 167 .pixelformat = V4L2_PIX_FMT_UYVY, 168 .field = V4L2_FIELD_INTERLACED, 169 .bytesperline = 720 * 2, 170 .sizeimage = 720 * 2 * 576, 171 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 172 { /*PAL top */ 173 .width = 720, 174 .height = 288, 175 .pixelformat = V4L2_PIX_FMT_UYVY, 176 .field = V4L2_FIELD_TOP, 177 .bytesperline = 720 * 2, 178 .sizeimage = 720 * 2 * 288, 179 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 180 { /*PAL bottom */ 181 .width = 720, 182 .height = 288, 183 .pixelformat = V4L2_PIX_FMT_UYVY, 184 .field = V4L2_FIELD_BOTTOM, 185 .bytesperline = 720 * 2, 186 .sizeimage = 720 * 2 * 288, 187 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 188 189 }; 190 191 static struct v4l2_pix_format formats_60[] = { 192 { /*NTSC interlaced */ 193 .width = 720, 194 .height = 480, 195 .pixelformat = V4L2_PIX_FMT_UYVY, 196 .field = V4L2_FIELD_INTERLACED, 197 .bytesperline = 720 * 2, 198 .sizeimage = 720 * 2 * 480, 199 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 200 { /*NTSC top */ 201 .width = 720, 202 .height = 240, 203 .pixelformat = V4L2_PIX_FMT_UYVY, 204 .field = V4L2_FIELD_TOP, 205 .bytesperline = 720 * 2, 206 .sizeimage = 720 * 2 * 240, 207 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 208 { /*NTSC bottom */ 209 .width = 720, 210 .height = 240, 211 .pixelformat = V4L2_PIX_FMT_UYVY, 212 .field = V4L2_FIELD_BOTTOM, 213 .bytesperline = 720 * 2, 214 .sizeimage = 720 * 2 * 240, 215 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 216 }; 217 218 /* Write VIP register */ 219 static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val) 220 { 221 iowrite32((val), (vip->iomem)+(reg)); 222 } 223 /* Read VIP register */ 224 static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg) 225 { 226 return ioread32((vip->iomem)+(reg)); 227 } 228 /* Start DMA acquisition */ 229 static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf) 230 { 231 unsigned long offset = 0; 232 233 if (vip->format.field == V4L2_FIELD_INTERLACED) 234 offset = vip->format.width * 2; 235 236 spin_lock_irq(&vip->slock); 237 /* Enable acquisition */ 238 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) | DVP_CTL_ENA); 239 /* Set Top and Bottom Field memory address */ 240 reg_write(vip, DVP_VTP, (u32)vip_buf->dma); 241 reg_write(vip, DVP_VBP, (u32)vip_buf->dma + offset); 242 spin_unlock_irq(&vip->slock); 243 } 244 245 /* Fetch the next buffer to activate */ 246 static void vip_active_buf_next(struct sta2x11_vip *vip) 247 { 248 /* Get the next buffer */ 249 spin_lock(&vip->lock); 250 if (list_empty(&vip->buffer_list)) {/* No available buffer */ 251 spin_unlock(&vip->lock); 252 return; 253 } 254 vip->active = list_first_entry(&vip->buffer_list, 255 struct vip_buffer, 256 list); 257 /* Reset Top and Bottom counter */ 258 vip->tcount = 0; 259 vip->bcount = 0; 260 spin_unlock(&vip->lock); 261 if (vb2_is_streaming(&vip->vb_vidq)) { /* streaming is on */ 262 start_dma(vip, vip->active); /* start dma capture */ 263 } 264 } 265 266 267 /* Videobuf2 Operations */ 268 static int queue_setup(struct vb2_queue *vq, 269 unsigned int *nbuffers, unsigned int *nplanes, 270 unsigned int sizes[], struct device *alloc_devs[]) 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; 279 280 vip->sequence = 0; 281 vip->active = NULL; 282 vip->tcount = 0; 283 vip->bcount = 0; 284 285 return 0; 286 }; 287 static int buffer_init(struct vb2_buffer *vb) 288 { 289 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 290 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 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 vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 300 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 301 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 302 unsigned long size; 303 304 size = vip->format.sizeimage; 305 if (vb2_plane_size(vb, 0) < size) { 306 v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n", 307 vb2_plane_size(vb, 0), size); 308 return -EINVAL; 309 } 310 311 vb2_set_plane_payload(&vip_buf->vb.vb2_buf, 0, size); 312 313 return 0; 314 } 315 static void buffer_queue(struct vb2_buffer *vb) 316 { 317 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 318 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 319 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 320 321 spin_lock(&vip->lock); 322 list_add_tail(&vip_buf->list, &vip->buffer_list); 323 if (!vip->active) { /* No active buffer, active the first one */ 324 vip->active = list_first_entry(&vip->buffer_list, 325 struct vip_buffer, 326 list); 327 if (vb2_is_streaming(&vip->vb_vidq)) /* streaming is on */ 328 start_dma(vip, vip_buf); /* start dma capture */ 329 } 330 spin_unlock(&vip->lock); 331 } 332 static void buffer_finish(struct vb2_buffer *vb) 333 { 334 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 335 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 336 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 337 338 /* Buffer handled, remove it from the list */ 339 spin_lock(&vip->lock); 340 list_del_init(&vip_buf->list); 341 spin_unlock(&vip->lock); 342 343 if (vb2_is_streaming(vb->vb2_queue)) 344 vip_active_buf_next(vip); 345 } 346 347 static int start_streaming(struct vb2_queue *vq, unsigned int count) 348 { 349 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 350 351 spin_lock_irq(&vip->slock); 352 /* Enable interrupt VSYNC Top and Bottom*/ 353 reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST); 354 spin_unlock_irq(&vip->slock); 355 356 if (count) 357 start_dma(vip, vip->active); 358 359 return 0; 360 } 361 362 /* abort streaming and wait for last buffer */ 363 static void stop_streaming(struct vb2_queue *vq) 364 { 365 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 366 struct vip_buffer *vip_buf, *node; 367 368 /* Disable acquisition */ 369 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 370 /* Disable all interrupts */ 371 reg_write(vip, DVP_ITM, 0); 372 373 /* Release all active buffers */ 374 spin_lock(&vip->lock); 375 list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) { 376 vb2_buffer_done(&vip_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 377 list_del(&vip_buf->list); 378 } 379 spin_unlock(&vip->lock); 380 } 381 382 static const struct vb2_ops vip_video_qops = { 383 .queue_setup = queue_setup, 384 .buf_init = buffer_init, 385 .buf_prepare = buffer_prepare, 386 .buf_finish = buffer_finish, 387 .buf_queue = buffer_queue, 388 .start_streaming = start_streaming, 389 .stop_streaming = stop_streaming, 390 .wait_prepare = vb2_ops_wait_prepare, 391 .wait_finish = vb2_ops_wait_finish, 392 }; 393 394 395 /* File Operations */ 396 static const struct v4l2_file_operations vip_fops = { 397 .owner = THIS_MODULE, 398 .open = v4l2_fh_open, 399 .release = vb2_fop_release, 400 .unlocked_ioctl = video_ioctl2, 401 .read = vb2_fop_read, 402 .mmap = vb2_fop_mmap, 403 .poll = vb2_fop_poll 404 }; 405 406 407 /** 408 * vidioc_querycap - return capabilities of device 409 * @file: descriptor of device 410 * @cap: contains return values 411 * @priv: unused 412 * 413 * the capabilities of the device are returned 414 * 415 * return value: 0, no error. 416 */ 417 static int vidioc_querycap(struct file *file, void *priv, 418 struct v4l2_capability *cap) 419 { 420 struct sta2x11_vip *vip = video_drvdata(file); 421 422 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); 423 strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card)); 424 snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s", 425 pci_name(vip->pdev)); 426 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 427 V4L2_CAP_STREAMING; 428 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 429 430 return 0; 431 } 432 433 /** 434 * vidioc_s_std - set video standard 435 * @file: descriptor of device 436 * @std: contains standard to be set 437 * @priv: unused 438 * 439 * the video standard is set 440 * 441 * return value: 0, no error. 442 * 443 * -EIO, no input signal detected 444 * 445 * other, returned from video DAC. 446 */ 447 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) 448 { 449 struct sta2x11_vip *vip = video_drvdata(file); 450 451 /* 452 * This is here for backwards compatibility only. 453 * The use of V4L2_STD_ALL to trigger a querystd is non-standard. 454 */ 455 if (std == V4L2_STD_ALL) { 456 v4l2_subdev_call(vip->decoder, video, querystd, &std); 457 if (std == V4L2_STD_UNKNOWN) 458 return -EIO; 459 } 460 461 if (vip->std != std) { 462 vip->std = std; 463 if (V4L2_STD_525_60 & std) 464 vip->format = formats_60[0]; 465 else 466 vip->format = formats_50[0]; 467 } 468 469 return v4l2_subdev_call(vip->decoder, video, s_std, std); 470 } 471 472 /** 473 * vidioc_g_std - get video standard 474 * @file: descriptor of device 475 * @priv: unused 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 * @priv: unused 494 * @std: contains return values 495 * 496 * all possible video standards are returned 497 * 498 * return value: delivered by video DAC routine. 499 */ 500 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) 501 { 502 struct sta2x11_vip *vip = video_drvdata(file); 503 504 return v4l2_subdev_call(vip->decoder, video, querystd, std); 505 } 506 507 static int vidioc_enum_input(struct file *file, void *priv, 508 struct v4l2_input *inp) 509 { 510 if (inp->index > 1) 511 return -EINVAL; 512 513 inp->type = V4L2_INPUT_TYPE_CAMERA; 514 inp->std = V4L2_STD_ALL; 515 sprintf(inp->name, "Camera %u", inp->index); 516 517 return 0; 518 } 519 520 /** 521 * vidioc_s_input - set input line 522 * @file: descriptor of device 523 * @priv: unused 524 * @i: new input line number 525 * 526 * the current active input line is set 527 * 528 * return value: 0, no error. 529 * 530 * -EINVAL, line number out of range 531 */ 532 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 533 { 534 struct sta2x11_vip *vip = video_drvdata(file); 535 int ret; 536 537 if (i > 1) 538 return -EINVAL; 539 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); 540 541 if (!ret) 542 vip->input = i; 543 544 return 0; 545 } 546 547 /** 548 * vidioc_g_input - return input line 549 * @file: descriptor of device 550 * @priv: unused 551 * @i: returned input line number 552 * 553 * the current active input line is returned 554 * 555 * return value: always 0. 556 */ 557 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 558 { 559 struct sta2x11_vip *vip = video_drvdata(file); 560 561 *i = vip->input; 562 return 0; 563 } 564 565 /** 566 * vidioc_enum_fmt_vid_cap - return video capture format 567 * @file: descriptor of device 568 * @priv: unused 569 * @f: returned format information 570 * 571 * returns name and format of video capture 572 * Only UYVY is supported by hardware. 573 * 574 * return value: always 0. 575 */ 576 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 577 struct v4l2_fmtdesc *f) 578 { 579 580 if (f->index != 0) 581 return -EINVAL; 582 583 strscpy(f->description, "4:2:2, packed, UYVY", sizeof(f->description)); 584 f->pixelformat = V4L2_PIX_FMT_UYVY; 585 f->flags = 0; 586 return 0; 587 } 588 589 /** 590 * vidioc_try_fmt_vid_cap - set video capture format 591 * @file: descriptor of device 592 * @priv: unused 593 * @f: new format 594 * 595 * new video format is set which includes width and 596 * field type. width is fixed to 720, no scaling. 597 * Only UYVY is supported by this hardware. 598 * the minimum height is 200, the maximum is 576 (PAL) 599 * 600 * return value: 0, no error 601 * 602 * -EINVAL, pixel or field format not supported 603 * 604 */ 605 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 606 struct v4l2_format *f) 607 { 608 struct sta2x11_vip *vip = video_drvdata(file); 609 int interlace_lim; 610 611 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { 612 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n"); 613 return -EINVAL; 614 } 615 616 if (V4L2_STD_525_60 & vip->std) 617 interlace_lim = 240; 618 else 619 interlace_lim = 288; 620 621 switch (f->fmt.pix.field) { 622 default: 623 case V4L2_FIELD_ANY: 624 if (interlace_lim < f->fmt.pix.height) 625 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 626 else 627 f->fmt.pix.field = V4L2_FIELD_BOTTOM; 628 break; 629 case V4L2_FIELD_TOP: 630 case V4L2_FIELD_BOTTOM: 631 if (interlace_lim < f->fmt.pix.height) 632 f->fmt.pix.height = interlace_lim; 633 break; 634 case V4L2_FIELD_INTERLACED: 635 break; 636 } 637 638 /* It is the only supported format */ 639 f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; 640 f->fmt.pix.height &= ~1; 641 if (2 * interlace_lim < f->fmt.pix.height) 642 f->fmt.pix.height = 2 * interlace_lim; 643 if (200 > f->fmt.pix.height) 644 f->fmt.pix.height = 200; 645 f->fmt.pix.width = 720; 646 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 647 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; 648 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 649 return 0; 650 } 651 652 /** 653 * vidioc_s_fmt_vid_cap - set current video format parameters 654 * @file: descriptor of device 655 * @priv: unused 656 * @f: returned format information 657 * 658 * set new capture format 659 * return value: 0, no error 660 * 661 * other, delivered by video DAC routine. 662 */ 663 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 664 struct v4l2_format *f) 665 { 666 struct sta2x11_vip *vip = video_drvdata(file); 667 unsigned int t_stop, b_stop, pitch; 668 int ret; 669 670 ret = vidioc_try_fmt_vid_cap(file, priv, f); 671 if (ret) 672 return ret; 673 674 if (vb2_is_busy(&vip->vb_vidq)) { 675 /* Can't change format during acquisition */ 676 v4l2_err(&vip->v4l2_dev, "device busy\n"); 677 return -EBUSY; 678 } 679 vip->format = f->fmt.pix; 680 switch (vip->format.field) { 681 case V4L2_FIELD_INTERLACED: 682 t_stop = ((vip->format.height / 2 - 1) << 16) | 683 (2 * vip->format.width - 1); 684 b_stop = t_stop; 685 pitch = 4 * vip->format.width; 686 break; 687 case V4L2_FIELD_TOP: 688 t_stop = ((vip->format.height - 1) << 16) | 689 (2 * vip->format.width - 1); 690 b_stop = (0 << 16) | (2 * vip->format.width - 1); 691 pitch = 2 * vip->format.width; 692 break; 693 case V4L2_FIELD_BOTTOM: 694 t_stop = (0 << 16) | (2 * vip->format.width - 1); 695 b_stop = (vip->format.height << 16) | 696 (2 * vip->format.width - 1); 697 pitch = 2 * vip->format.width; 698 break; 699 default: 700 v4l2_err(&vip->v4l2_dev, "unknown field format\n"); 701 return -EINVAL; 702 } 703 704 spin_lock_irq(&vip->slock); 705 /* Y-X Top Field Offset */ 706 reg_write(vip, DVP_TFO, 0); 707 /* Y-X Bottom Field Offset */ 708 reg_write(vip, DVP_BFO, 0); 709 /* Y-X Top Field Stop*/ 710 reg_write(vip, DVP_TFS, t_stop); 711 /* Y-X Bottom Field Stop */ 712 reg_write(vip, DVP_BFS, b_stop); 713 /* Video Memory Pitch */ 714 reg_write(vip, DVP_VMP, pitch); 715 spin_unlock_irq(&vip->slock); 716 717 return 0; 718 } 719 720 /** 721 * vidioc_g_fmt_vid_cap - get current video format parameters 722 * @file: descriptor of device 723 * @priv: unused 724 * @f: contains format information 725 * 726 * returns current video format parameters 727 * 728 * return value: 0, always successful 729 */ 730 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 731 struct v4l2_format *f) 732 { 733 struct sta2x11_vip *vip = video_drvdata(file); 734 735 f->fmt.pix = vip->format; 736 737 return 0; 738 } 739 740 static const struct v4l2_ioctl_ops vip_ioctl_ops = { 741 .vidioc_querycap = vidioc_querycap, 742 /* FMT handling */ 743 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 744 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 745 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 746 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 747 /* Buffer handlers */ 748 .vidioc_create_bufs = vb2_ioctl_create_bufs, 749 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 750 .vidioc_reqbufs = vb2_ioctl_reqbufs, 751 .vidioc_querybuf = vb2_ioctl_querybuf, 752 .vidioc_qbuf = vb2_ioctl_qbuf, 753 .vidioc_dqbuf = vb2_ioctl_dqbuf, 754 /* Stream on/off */ 755 .vidioc_streamon = vb2_ioctl_streamon, 756 .vidioc_streamoff = vb2_ioctl_streamoff, 757 /* Standard handling */ 758 .vidioc_g_std = vidioc_g_std, 759 .vidioc_s_std = vidioc_s_std, 760 .vidioc_querystd = vidioc_querystd, 761 /* Input handling */ 762 .vidioc_enum_input = vidioc_enum_input, 763 .vidioc_g_input = vidioc_g_input, 764 .vidioc_s_input = vidioc_s_input, 765 /* Log status ioctl */ 766 .vidioc_log_status = v4l2_ctrl_log_status, 767 /* Event handling */ 768 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 769 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 770 }; 771 772 static const struct video_device video_dev_template = { 773 .name = KBUILD_MODNAME, 774 .release = video_device_release_empty, 775 .fops = &vip_fops, 776 .ioctl_ops = &vip_ioctl_ops, 777 .tvnorms = V4L2_STD_ALL, 778 }; 779 780 /** 781 * vip_irq - interrupt routine 782 * @irq: Number of interrupt ( not used, correct number is assumed ) 783 * @vip: local data structure containing all information 784 * 785 * check for both frame interrupts set ( top and bottom ). 786 * check FIFO overflow, but limit number of log messages after open. 787 * signal a complete buffer if done 788 * 789 * return value: IRQ_NONE, interrupt was not generated by VIP 790 * 791 * IRQ_HANDLED, interrupt done. 792 */ 793 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip) 794 { 795 unsigned int status; 796 797 status = reg_read(vip, DVP_ITS); 798 799 if (!status) /* No interrupt to handle */ 800 return IRQ_NONE; 801 802 if (status & DVP_IT_FIFO) 803 if (vip->overflow++ > 5) 804 pr_info("VIP: fifo overflow\n"); 805 806 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { 807 /* this is bad, we are too slow, hope the condition is gone 808 * on the next frame */ 809 return IRQ_HANDLED; 810 } 811 812 if (status & DVP_IT_VST) 813 if ((++vip->tcount) < 2) 814 return IRQ_HANDLED; 815 if (status & DVP_IT_VSB) { 816 vip->bcount++; 817 return IRQ_HANDLED; 818 } 819 820 if (vip->active) { /* Acquisition is over on this buffer */ 821 /* Disable acquisition */ 822 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 823 /* Remove the active buffer from the list */ 824 vip->active->vb.vb2_buf.timestamp = ktime_get_ns(); 825 vip->active->vb.sequence = vip->sequence++; 826 vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE); 827 } 828 829 return IRQ_HANDLED; 830 } 831 832 static void sta2x11_vip_init_register(struct sta2x11_vip *vip) 833 { 834 /* Register initialization */ 835 spin_lock_irq(&vip->slock); 836 /* Clean interrupt */ 837 reg_read(vip, DVP_ITS); 838 /* Enable Half Line per vertical */ 839 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); 840 /* Reset VIP control */ 841 reg_write(vip, DVP_CTL, DVP_CTL_RST); 842 /* Clear VIP control */ 843 reg_write(vip, DVP_CTL, 0); 844 spin_unlock_irq(&vip->slock); 845 } 846 static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) 847 { 848 spin_lock_irq(&vip->slock); 849 /* Disable interrupt */ 850 reg_write(vip, DVP_ITM, 0); 851 /* Reset VIP Control */ 852 reg_write(vip, DVP_CTL, DVP_CTL_RST); 853 /* Clear VIP Control */ 854 reg_write(vip, DVP_CTL, 0); 855 /* Clean VIP Interrupt */ 856 reg_read(vip, DVP_ITS); 857 spin_unlock_irq(&vip->slock); 858 } 859 static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) 860 { 861 int err; 862 863 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); 864 if (err) { 865 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); 866 return err; 867 } 868 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); 869 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 870 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; 871 vip->vb_vidq.drv_priv = vip; 872 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); 873 vip->vb_vidq.ops = &vip_video_qops; 874 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; 875 vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 876 vip->vb_vidq.dev = &vip->pdev->dev; 877 vip->vb_vidq.lock = &vip->v4l_lock; 878 err = vb2_queue_init(&vip->vb_vidq); 879 if (err) 880 return err; 881 INIT_LIST_HEAD(&vip->buffer_list); 882 spin_lock_init(&vip->lock); 883 return 0; 884 } 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 = -ENODEV; 917 918 if (!gpio_is_valid(pin)) 919 return ret; 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 (gpio_is_valid(pin)) { 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 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, 1012 config->reset_name); 1013 if (ret) { 1014 vip_gpio_release(&pdev->dev, config->pwr_pin, 1015 config->pwr_name); 1016 goto disable; 1017 } 1018 1019 if (gpio_is_valid(config->pwr_pin)) { 1020 /* Datasheet says 5ms between PWR and RST */ 1021 usleep_range(5000, 25000); 1022 gpio_direction_output(config->pwr_pin, 1); 1023 } 1024 1025 if (gpio_is_valid(config->reset_pin)) { 1026 /* Datasheet says 5ms between PWR and RST */ 1027 usleep_range(5000, 25000); 1028 gpio_direction_output(config->reset_pin, 1); 1029 } 1030 usleep_range(5000, 25000); 1031 1032 /* Allocate a new VIP instance */ 1033 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); 1034 if (!vip) { 1035 ret = -ENOMEM; 1036 goto release_gpios; 1037 } 1038 vip->pdev = pdev; 1039 vip->std = V4L2_STD_PAL; 1040 vip->format = formats_50[0]; 1041 vip->config = config; 1042 mutex_init(&vip->v4l_lock); 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 /* Initialize and register video device */ 1086 vip->video_dev = video_dev_template; 1087 vip->video_dev.v4l2_dev = &vip->v4l2_dev; 1088 vip->video_dev.queue = &vip->vb_vidq; 1089 vip->video_dev.lock = &vip->v4l_lock; 1090 video_set_drvdata(&vip->video_dev, vip); 1091 1092 ret = video_register_device(&vip->video_dev, VFL_TYPE_GRABBER, -1); 1093 if (ret) 1094 goto vrelease; 1095 1096 /* Get ADV7180 subdevice */ 1097 vip->adapter = i2c_get_adapter(vip->config->i2c_id); 1098 if (!vip->adapter) { 1099 ret = -ENODEV; 1100 dev_err(&pdev->dev, "no I2C adapter found\n"); 1101 goto vunreg; 1102 } 1103 1104 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, 1105 "adv7180", vip->config->i2c_addr, 1106 NULL); 1107 if (!vip->decoder) { 1108 ret = -ENODEV; 1109 dev_err(&pdev->dev, "no decoder found\n"); 1110 goto vunreg; 1111 } 1112 1113 i2c_put_adapter(vip->adapter); 1114 v4l2_subdev_call(vip->decoder, core, init, 0); 1115 1116 sta2x11_vip_init_register(vip); 1117 1118 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); 1119 return 0; 1120 1121 vunreg: 1122 video_set_drvdata(&vip->video_dev, NULL); 1123 vrelease: 1124 video_unregister_device(&vip->video_dev); 1125 free_irq(pdev->irq, vip); 1126 release_buf: 1127 pci_disable_msi(pdev); 1128 unmap: 1129 vb2_queue_release(&vip->vb_vidq); 1130 pci_iounmap(pdev, vip->iomem); 1131 release: 1132 pci_release_regions(pdev); 1133 unreg: 1134 v4l2_device_unregister(&vip->v4l2_dev); 1135 free_mem: 1136 kfree(vip); 1137 release_gpios: 1138 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); 1139 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); 1140 disable: 1141 /* 1142 * do not call pci_disable_device on sta2x11 because it break all 1143 * other Bus masters on this EP 1144 */ 1145 return ret; 1146 } 1147 1148 /** 1149 * sta2x11_vip_remove_one - release device 1150 * @pdev: PCI device 1151 * 1152 * Undo everything done in .._init_one 1153 * 1154 * unregister video device 1155 * free interrupt 1156 * unmap ioadresses 1157 * free memory 1158 * free GPIO pins 1159 */ 1160 static void sta2x11_vip_remove_one(struct pci_dev *pdev) 1161 { 1162 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1163 struct sta2x11_vip *vip = 1164 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1165 1166 sta2x11_vip_clear_register(vip); 1167 1168 video_set_drvdata(&vip->video_dev, NULL); 1169 video_unregister_device(&vip->video_dev); 1170 free_irq(pdev->irq, vip); 1171 pci_disable_msi(pdev); 1172 vb2_queue_release(&vip->vb_vidq); 1173 pci_iounmap(pdev, vip->iomem); 1174 pci_release_regions(pdev); 1175 1176 v4l2_device_unregister(&vip->v4l2_dev); 1177 1178 vip_gpio_release(&pdev->dev, vip->config->pwr_pin, 1179 vip->config->pwr_name); 1180 vip_gpio_release(&pdev->dev, vip->config->reset_pin, 1181 vip->config->reset_name); 1182 1183 kfree(vip); 1184 /* 1185 * do not call pci_disable_device on sta2x11 because it break all 1186 * other Bus masters on this EP 1187 */ 1188 } 1189 1190 #ifdef CONFIG_PM 1191 1192 /** 1193 * sta2x11_vip_suspend - set device into power save mode 1194 * @pdev: PCI device 1195 * @state: new state of device 1196 * 1197 * all relevant registers are saved and an attempt to set a new state is made. 1198 * 1199 * return value: 0 always indicate success, 1200 * even if device could not be disabled. (workaround for hardware problem) 1201 */ 1202 static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state) 1203 { 1204 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1205 struct sta2x11_vip *vip = 1206 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1207 unsigned long flags; 1208 int i; 1209 1210 spin_lock_irqsave(&vip->slock, flags); 1211 vip->register_save_area[0] = reg_read(vip, DVP_CTL); 1212 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); 1213 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); 1214 reg_write(vip, DVP_ITM, 0); 1215 for (i = 1; i < SAVE_COUNT; i++) 1216 vip->register_save_area[i] = reg_read(vip, 4 * i); 1217 for (i = 0; i < AUX_COUNT; i++) 1218 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = 1219 reg_read(vip, registers_to_save[i]); 1220 spin_unlock_irqrestore(&vip->slock, flags); 1221 /* save pci state */ 1222 pci_save_state(pdev); 1223 if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) { 1224 /* 1225 * do not call pci_disable_device on sta2x11 because it 1226 * break all other Bus masters on this EP 1227 */ 1228 vip->disabled = 1; 1229 } 1230 1231 pr_info("VIP: suspend\n"); 1232 return 0; 1233 } 1234 1235 /** 1236 * sta2x11_vip_resume - resume device operation 1237 * @pdev : PCI device 1238 * 1239 * re-enable device, set PCI state to powered and restore registers. 1240 * resume normal device operation afterwards. 1241 * 1242 * return value: 0, no error. 1243 * 1244 * other, could not set device to power on state. 1245 */ 1246 static int sta2x11_vip_resume(struct pci_dev *pdev) 1247 { 1248 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1249 struct sta2x11_vip *vip = 1250 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1251 unsigned long flags; 1252 int ret, i; 1253 1254 pr_info("VIP: resume\n"); 1255 /* restore pci state */ 1256 if (vip->disabled) { 1257 ret = pci_enable_device(pdev); 1258 if (ret) { 1259 pr_warn("VIP: Can't enable device.\n"); 1260 return ret; 1261 } 1262 vip->disabled = 0; 1263 } 1264 ret = pci_set_power_state(pdev, PCI_D0); 1265 if (ret) { 1266 /* 1267 * do not call pci_disable_device on sta2x11 because it 1268 * break all other Bus masters on this EP 1269 */ 1270 pr_warn("VIP: Can't enable device.\n"); 1271 vip->disabled = 1; 1272 return ret; 1273 } 1274 1275 pci_restore_state(pdev); 1276 1277 spin_lock_irqsave(&vip->slock, flags); 1278 for (i = 1; i < SAVE_COUNT; i++) 1279 reg_write(vip, 4 * i, vip->register_save_area[i]); 1280 for (i = 0; i < AUX_COUNT; i++) 1281 reg_write(vip, registers_to_save[i], 1282 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); 1283 reg_write(vip, DVP_CTL, vip->register_save_area[0]); 1284 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); 1285 spin_unlock_irqrestore(&vip->slock, flags); 1286 return 0; 1287 } 1288 1289 #endif 1290 1291 static const struct pci_device_id sta2x11_vip_pci_tbl[] = { 1292 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, 1293 {0,} 1294 }; 1295 1296 static struct pci_driver sta2x11_vip_driver = { 1297 .name = KBUILD_MODNAME, 1298 .probe = sta2x11_vip_init_one, 1299 .remove = sta2x11_vip_remove_one, 1300 .id_table = sta2x11_vip_pci_tbl, 1301 #ifdef CONFIG_PM 1302 .suspend = sta2x11_vip_suspend, 1303 .resume = sta2x11_vip_resume, 1304 #endif 1305 }; 1306 1307 static int __init sta2x11_vip_init_module(void) 1308 { 1309 return pci_register_driver(&sta2x11_vip_driver); 1310 } 1311 1312 static void __exit sta2x11_vip_exit_module(void) 1313 { 1314 pci_unregister_driver(&sta2x11_vip_driver); 1315 } 1316 1317 #ifdef MODULE 1318 module_init(sta2x11_vip_init_module); 1319 module_exit(sta2x11_vip_exit_module); 1320 #else 1321 late_initcall_sync(sta2x11_vip_init_module); 1322 #endif 1323 1324 MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); 1325 MODULE_AUTHOR("Wind River"); 1326 MODULE_LICENSE("GPL v2"); 1327 MODULE_SUPPORTED_DEVICE("sta2x11 video input"); 1328 MODULE_VERSION(DRV_VERSION); 1329 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); 1330