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 * 408 * the capabilities of the device are returned 409 * 410 * return value: 0, no error. 411 */ 412 static int vidioc_querycap(struct file *file, void *priv, 413 struct v4l2_capability *cap) 414 { 415 struct sta2x11_vip *vip = video_drvdata(file); 416 417 strcpy(cap->driver, KBUILD_MODNAME); 418 strcpy(cap->card, KBUILD_MODNAME); 419 snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s", 420 pci_name(vip->pdev)); 421 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 422 V4L2_CAP_STREAMING; 423 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 424 425 return 0; 426 } 427 428 /** 429 * vidioc_s_std - set video standard 430 * @file: descriptor of device 431 * @std: contains standard to be set 432 * 433 * the video standard is set 434 * 435 * return value: 0, no error. 436 * 437 * -EIO, no input signal detected 438 * 439 * other, returned from video DAC. 440 */ 441 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) 442 { 443 struct sta2x11_vip *vip = video_drvdata(file); 444 445 /* 446 * This is here for backwards compatibility only. 447 * The use of V4L2_STD_ALL to trigger a querystd is non-standard. 448 */ 449 if (std == V4L2_STD_ALL) { 450 v4l2_subdev_call(vip->decoder, video, querystd, &std); 451 if (std == V4L2_STD_UNKNOWN) 452 return -EIO; 453 } 454 455 if (vip->std != std) { 456 vip->std = std; 457 if (V4L2_STD_525_60 & std) 458 vip->format = formats_60[0]; 459 else 460 vip->format = formats_50[0]; 461 } 462 463 return v4l2_subdev_call(vip->decoder, video, s_std, std); 464 } 465 466 /** 467 * vidioc_g_std - get video standard 468 * @file: descriptor of device 469 * @std: contains return values 470 * 471 * the current video standard is returned 472 * 473 * return value: 0, no error. 474 */ 475 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) 476 { 477 struct sta2x11_vip *vip = video_drvdata(file); 478 479 *std = vip->std; 480 return 0; 481 } 482 483 /** 484 * vidioc_querystd - get possible video standards 485 * @file: descriptor of device 486 * @std: contains return values 487 * 488 * all possible video standards are returned 489 * 490 * return value: delivered by video DAC routine. 491 */ 492 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) 493 { 494 struct sta2x11_vip *vip = video_drvdata(file); 495 496 return v4l2_subdev_call(vip->decoder, video, querystd, std); 497 } 498 499 static int vidioc_enum_input(struct file *file, void *priv, 500 struct v4l2_input *inp) 501 { 502 if (inp->index > 1) 503 return -EINVAL; 504 505 inp->type = V4L2_INPUT_TYPE_CAMERA; 506 inp->std = V4L2_STD_ALL; 507 sprintf(inp->name, "Camera %u", inp->index); 508 509 return 0; 510 } 511 512 /** 513 * vidioc_s_input - set input line 514 * @file: descriptor of device 515 * @i: new input line number 516 * 517 * the current active input line is set 518 * 519 * return value: 0, no error. 520 * 521 * -EINVAL, line number out of range 522 */ 523 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 524 { 525 struct sta2x11_vip *vip = video_drvdata(file); 526 int ret; 527 528 if (i > 1) 529 return -EINVAL; 530 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); 531 532 if (!ret) 533 vip->input = i; 534 535 return 0; 536 } 537 538 /** 539 * vidioc_g_input - return input line 540 * @file: descriptor of device 541 * @i: returned input line number 542 * 543 * the current active input line is returned 544 * 545 * return value: always 0. 546 */ 547 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 548 { 549 struct sta2x11_vip *vip = video_drvdata(file); 550 551 *i = vip->input; 552 return 0; 553 } 554 555 /** 556 * vidioc_enum_fmt_vid_cap - return video capture format 557 * @f: returned format information 558 * 559 * returns name and format of video capture 560 * Only UYVY is supported by hardware. 561 * 562 * return value: always 0. 563 */ 564 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 565 struct v4l2_fmtdesc *f) 566 { 567 568 if (f->index != 0) 569 return -EINVAL; 570 571 strcpy(f->description, "4:2:2, packed, UYVY"); 572 f->pixelformat = V4L2_PIX_FMT_UYVY; 573 f->flags = 0; 574 return 0; 575 } 576 577 /** 578 * vidioc_try_fmt_vid_cap - set video capture format 579 * @file: descriptor of device 580 * @f: new format 581 * 582 * new video format is set which includes width and 583 * field type. width is fixed to 720, no scaling. 584 * Only UYVY is supported by this hardware. 585 * the minimum height is 200, the maximum is 576 (PAL) 586 * 587 * return value: 0, no error 588 * 589 * -EINVAL, pixel or field format not supported 590 * 591 */ 592 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 593 struct v4l2_format *f) 594 { 595 struct sta2x11_vip *vip = video_drvdata(file); 596 int interlace_lim; 597 598 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { 599 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n"); 600 return -EINVAL; 601 } 602 603 if (V4L2_STD_525_60 & vip->std) 604 interlace_lim = 240; 605 else 606 interlace_lim = 288; 607 608 switch (f->fmt.pix.field) { 609 default: 610 case V4L2_FIELD_ANY: 611 if (interlace_lim < f->fmt.pix.height) 612 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 613 else 614 f->fmt.pix.field = V4L2_FIELD_BOTTOM; 615 break; 616 case V4L2_FIELD_TOP: 617 case V4L2_FIELD_BOTTOM: 618 if (interlace_lim < f->fmt.pix.height) 619 f->fmt.pix.height = interlace_lim; 620 break; 621 case V4L2_FIELD_INTERLACED: 622 break; 623 } 624 625 /* It is the only supported format */ 626 f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; 627 f->fmt.pix.height &= ~1; 628 if (2 * interlace_lim < f->fmt.pix.height) 629 f->fmt.pix.height = 2 * interlace_lim; 630 if (200 > f->fmt.pix.height) 631 f->fmt.pix.height = 200; 632 f->fmt.pix.width = 720; 633 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 634 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; 635 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 636 return 0; 637 } 638 639 /** 640 * vidioc_s_fmt_vid_cap - set current video format parameters 641 * @file: descriptor of device 642 * @f: returned format information 643 * 644 * set new capture format 645 * return value: 0, no error 646 * 647 * other, delivered by video DAC routine. 648 */ 649 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 650 struct v4l2_format *f) 651 { 652 struct sta2x11_vip *vip = video_drvdata(file); 653 unsigned int t_stop, b_stop, pitch; 654 int ret; 655 656 ret = vidioc_try_fmt_vid_cap(file, priv, f); 657 if (ret) 658 return ret; 659 660 if (vb2_is_busy(&vip->vb_vidq)) { 661 /* Can't change format during acquisition */ 662 v4l2_err(&vip->v4l2_dev, "device busy\n"); 663 return -EBUSY; 664 } 665 vip->format = f->fmt.pix; 666 switch (vip->format.field) { 667 case V4L2_FIELD_INTERLACED: 668 t_stop = ((vip->format.height / 2 - 1) << 16) | 669 (2 * vip->format.width - 1); 670 b_stop = t_stop; 671 pitch = 4 * vip->format.width; 672 break; 673 case V4L2_FIELD_TOP: 674 t_stop = ((vip->format.height - 1) << 16) | 675 (2 * vip->format.width - 1); 676 b_stop = (0 << 16) | (2 * vip->format.width - 1); 677 pitch = 2 * vip->format.width; 678 break; 679 case V4L2_FIELD_BOTTOM: 680 t_stop = (0 << 16) | (2 * vip->format.width - 1); 681 b_stop = (vip->format.height << 16) | 682 (2 * vip->format.width - 1); 683 pitch = 2 * vip->format.width; 684 break; 685 default: 686 v4l2_err(&vip->v4l2_dev, "unknown field format\n"); 687 return -EINVAL; 688 } 689 690 spin_lock_irq(&vip->slock); 691 /* Y-X Top Field Offset */ 692 reg_write(vip, DVP_TFO, 0); 693 /* Y-X Bottom Field Offset */ 694 reg_write(vip, DVP_BFO, 0); 695 /* Y-X Top Field Stop*/ 696 reg_write(vip, DVP_TFS, t_stop); 697 /* Y-X Bottom Field Stop */ 698 reg_write(vip, DVP_BFS, b_stop); 699 /* Video Memory Pitch */ 700 reg_write(vip, DVP_VMP, pitch); 701 spin_unlock_irq(&vip->slock); 702 703 return 0; 704 } 705 706 /** 707 * vidioc_g_fmt_vid_cap - get current video format parameters 708 * @file: descriptor of device 709 * @f: contains format information 710 * 711 * returns current video format parameters 712 * 713 * return value: 0, always successful 714 */ 715 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 716 struct v4l2_format *f) 717 { 718 struct sta2x11_vip *vip = video_drvdata(file); 719 720 f->fmt.pix = vip->format; 721 722 return 0; 723 } 724 725 static const struct v4l2_ioctl_ops vip_ioctl_ops = { 726 .vidioc_querycap = vidioc_querycap, 727 /* FMT handling */ 728 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 729 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 730 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 731 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 732 /* Buffer handlers */ 733 .vidioc_create_bufs = vb2_ioctl_create_bufs, 734 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 735 .vidioc_reqbufs = vb2_ioctl_reqbufs, 736 .vidioc_querybuf = vb2_ioctl_querybuf, 737 .vidioc_qbuf = vb2_ioctl_qbuf, 738 .vidioc_dqbuf = vb2_ioctl_dqbuf, 739 /* Stream on/off */ 740 .vidioc_streamon = vb2_ioctl_streamon, 741 .vidioc_streamoff = vb2_ioctl_streamoff, 742 /* Standard handling */ 743 .vidioc_g_std = vidioc_g_std, 744 .vidioc_s_std = vidioc_s_std, 745 .vidioc_querystd = vidioc_querystd, 746 /* Input handling */ 747 .vidioc_enum_input = vidioc_enum_input, 748 .vidioc_g_input = vidioc_g_input, 749 .vidioc_s_input = vidioc_s_input, 750 /* Log status ioctl */ 751 .vidioc_log_status = v4l2_ctrl_log_status, 752 /* Event handling */ 753 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 754 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 755 }; 756 757 static const struct video_device video_dev_template = { 758 .name = KBUILD_MODNAME, 759 .release = video_device_release_empty, 760 .fops = &vip_fops, 761 .ioctl_ops = &vip_ioctl_ops, 762 .tvnorms = V4L2_STD_ALL, 763 }; 764 765 /** 766 * vip_irq - interrupt routine 767 * @irq: Number of interrupt ( not used, correct number is assumed ) 768 * @vip: local data structure containing all information 769 * 770 * check for both frame interrupts set ( top and bottom ). 771 * check FIFO overflow, but limit number of log messages after open. 772 * signal a complete buffer if done 773 * 774 * return value: IRQ_NONE, interrupt was not generated by VIP 775 * 776 * IRQ_HANDLED, interrupt done. 777 */ 778 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip) 779 { 780 unsigned int status; 781 782 status = reg_read(vip, DVP_ITS); 783 784 if (!status) /* No interrupt to handle */ 785 return IRQ_NONE; 786 787 if (status & DVP_IT_FIFO) 788 if (vip->overflow++ > 5) 789 pr_info("VIP: fifo overflow\n"); 790 791 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { 792 /* this is bad, we are too slow, hope the condition is gone 793 * on the next frame */ 794 return IRQ_HANDLED; 795 } 796 797 if (status & DVP_IT_VST) 798 if ((++vip->tcount) < 2) 799 return IRQ_HANDLED; 800 if (status & DVP_IT_VSB) { 801 vip->bcount++; 802 return IRQ_HANDLED; 803 } 804 805 if (vip->active) { /* Acquisition is over on this buffer */ 806 /* Disable acquisition */ 807 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 808 /* Remove the active buffer from the list */ 809 vip->active->vb.vb2_buf.timestamp = ktime_get_ns(); 810 vip->active->vb.sequence = vip->sequence++; 811 vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE); 812 } 813 814 return IRQ_HANDLED; 815 } 816 817 static void sta2x11_vip_init_register(struct sta2x11_vip *vip) 818 { 819 /* Register initialization */ 820 spin_lock_irq(&vip->slock); 821 /* Clean interrupt */ 822 reg_read(vip, DVP_ITS); 823 /* Enable Half Line per vertical */ 824 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); 825 /* Reset VIP control */ 826 reg_write(vip, DVP_CTL, DVP_CTL_RST); 827 /* Clear VIP control */ 828 reg_write(vip, DVP_CTL, 0); 829 spin_unlock_irq(&vip->slock); 830 } 831 static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) 832 { 833 spin_lock_irq(&vip->slock); 834 /* Disable interrupt */ 835 reg_write(vip, DVP_ITM, 0); 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 /* Clean VIP Interrupt */ 841 reg_read(vip, DVP_ITS); 842 spin_unlock_irq(&vip->slock); 843 } 844 static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) 845 { 846 int err; 847 848 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); 849 if (err) { 850 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); 851 return err; 852 } 853 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); 854 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 855 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; 856 vip->vb_vidq.drv_priv = vip; 857 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); 858 vip->vb_vidq.ops = &vip_video_qops; 859 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; 860 vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 861 vip->vb_vidq.dev = &vip->pdev->dev; 862 err = vb2_queue_init(&vip->vb_vidq); 863 if (err) 864 return err; 865 INIT_LIST_HEAD(&vip->buffer_list); 866 spin_lock_init(&vip->lock); 867 return 0; 868 } 869 870 static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) 871 { 872 /* 873 * Inititialize an empty control so VIP can inerithing controls 874 * from ADV7180 875 */ 876 v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); 877 878 vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; 879 if (vip->ctrl_hdl.error) { 880 int err = vip->ctrl_hdl.error; 881 882 v4l2_ctrl_handler_free(&vip->ctrl_hdl); 883 return err; 884 } 885 886 return 0; 887 } 888 889 /** 890 * vip_gpio_reserve - reserve gpio pin 891 * @dev: device 892 * @pin: GPIO pin number 893 * @dir: direction, input or output 894 * @name: GPIO pin name 895 * 896 */ 897 static int vip_gpio_reserve(struct device *dev, int pin, int dir, 898 const char *name) 899 { 900 int ret; 901 902 if (pin == -1) 903 return 0; 904 905 ret = gpio_request(pin, name); 906 if (ret) { 907 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); 908 return ret; 909 } 910 911 ret = gpio_direction_output(pin, dir); 912 if (ret) { 913 dev_err(dev, "Failed to set direction for pin %d (%s)\n", 914 pin, name); 915 gpio_free(pin); 916 return ret; 917 } 918 919 ret = gpio_export(pin, false); 920 if (ret) { 921 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); 922 gpio_free(pin); 923 return ret; 924 } 925 926 return 0; 927 } 928 929 /** 930 * vip_gpio_release - release gpio pin 931 * @dev: device 932 * @pin: GPIO pin number 933 * @name: GPIO pin name 934 * 935 */ 936 static void vip_gpio_release(struct device *dev, int pin, const char *name) 937 { 938 if (pin != -1) { 939 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); 940 gpio_unexport(pin); 941 gpio_free(pin); 942 } 943 } 944 945 /** 946 * sta2x11_vip_init_one - init one instance of video device 947 * @pdev: PCI device 948 * @ent: (not used) 949 * 950 * allocate reset pins for DAC. 951 * Reset video DAC, this is done via reset line. 952 * allocate memory for managing device 953 * request interrupt 954 * map IO region 955 * register device 956 * find and initialize video DAC 957 * 958 * return value: 0, no error 959 * 960 * -ENOMEM, no memory 961 * 962 * -ENODEV, device could not be detected or registered 963 */ 964 static int sta2x11_vip_init_one(struct pci_dev *pdev, 965 const struct pci_device_id *ent) 966 { 967 int ret; 968 struct sta2x11_vip *vip; 969 struct vip_config *config; 970 971 /* Check if hardware support 26-bit DMA */ 972 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { 973 dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); 974 return -EINVAL; 975 } 976 /* Enable PCI */ 977 ret = pci_enable_device(pdev); 978 if (ret) 979 return ret; 980 981 /* Get VIP platform data */ 982 config = dev_get_platdata(&pdev->dev); 983 if (!config) { 984 dev_info(&pdev->dev, "VIP slot disabled\n"); 985 ret = -EINVAL; 986 goto disable; 987 } 988 989 /* Power configuration */ 990 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, 991 config->pwr_name); 992 if (ret) 993 goto disable; 994 995 if (config->reset_pin >= 0) { 996 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, 997 config->reset_name); 998 if (ret) { 999 vip_gpio_release(&pdev->dev, config->pwr_pin, 1000 config->pwr_name); 1001 goto disable; 1002 } 1003 } 1004 if (config->pwr_pin != -1) { 1005 /* Datasheet says 5ms between PWR and RST */ 1006 usleep_range(5000, 25000); 1007 ret = gpio_direction_output(config->pwr_pin, 1); 1008 } 1009 1010 if (config->reset_pin != -1) { 1011 /* Datasheet says 5ms between PWR and RST */ 1012 usleep_range(5000, 25000); 1013 ret = gpio_direction_output(config->reset_pin, 1); 1014 } 1015 usleep_range(5000, 25000); 1016 1017 /* Allocate a new VIP instance */ 1018 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); 1019 if (!vip) { 1020 ret = -ENOMEM; 1021 goto release_gpios; 1022 } 1023 vip->pdev = pdev; 1024 vip->std = V4L2_STD_PAL; 1025 vip->format = formats_50[0]; 1026 vip->config = config; 1027 1028 ret = sta2x11_vip_init_controls(vip); 1029 if (ret) 1030 goto free_mem; 1031 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); 1032 if (ret) 1033 goto free_mem; 1034 1035 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", 1036 (unsigned long)pci_resource_start(pdev, 0), 1037 (unsigned long)pci_resource_len(pdev, 0), pdev->irq); 1038 1039 pci_set_master(pdev); 1040 1041 ret = pci_request_regions(pdev, KBUILD_MODNAME); 1042 if (ret) 1043 goto unreg; 1044 1045 vip->iomem = pci_iomap(pdev, 0, 0x100); 1046 if (!vip->iomem) { 1047 ret = -ENOMEM; 1048 goto release; 1049 } 1050 1051 pci_enable_msi(pdev); 1052 1053 /* Initialize buffer */ 1054 ret = sta2x11_vip_init_buffer(vip); 1055 if (ret) 1056 goto unmap; 1057 1058 spin_lock_init(&vip->slock); 1059 1060 ret = request_irq(pdev->irq, 1061 (irq_handler_t) vip_irq, 1062 IRQF_SHARED, KBUILD_MODNAME, vip); 1063 if (ret) { 1064 dev_err(&pdev->dev, "request_irq failed\n"); 1065 ret = -ENODEV; 1066 goto release_buf; 1067 } 1068 1069 /* Initialize and register video device */ 1070 vip->video_dev = video_dev_template; 1071 vip->video_dev.v4l2_dev = &vip->v4l2_dev; 1072 vip->video_dev.queue = &vip->vb_vidq; 1073 video_set_drvdata(&vip->video_dev, vip); 1074 1075 ret = video_register_device(&vip->video_dev, VFL_TYPE_GRABBER, -1); 1076 if (ret) 1077 goto vrelease; 1078 1079 /* Get ADV7180 subdevice */ 1080 vip->adapter = i2c_get_adapter(vip->config->i2c_id); 1081 if (!vip->adapter) { 1082 ret = -ENODEV; 1083 dev_err(&pdev->dev, "no I2C adapter found\n"); 1084 goto vunreg; 1085 } 1086 1087 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, 1088 "adv7180", vip->config->i2c_addr, 1089 NULL); 1090 if (!vip->decoder) { 1091 ret = -ENODEV; 1092 dev_err(&pdev->dev, "no decoder found\n"); 1093 goto vunreg; 1094 } 1095 1096 i2c_put_adapter(vip->adapter); 1097 v4l2_subdev_call(vip->decoder, core, init, 0); 1098 1099 sta2x11_vip_init_register(vip); 1100 1101 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); 1102 return 0; 1103 1104 vunreg: 1105 video_set_drvdata(&vip->video_dev, NULL); 1106 vrelease: 1107 video_unregister_device(&vip->video_dev); 1108 free_irq(pdev->irq, vip); 1109 release_buf: 1110 pci_disable_msi(pdev); 1111 unmap: 1112 vb2_queue_release(&vip->vb_vidq); 1113 pci_iounmap(pdev, vip->iomem); 1114 release: 1115 pci_release_regions(pdev); 1116 unreg: 1117 v4l2_device_unregister(&vip->v4l2_dev); 1118 free_mem: 1119 kfree(vip); 1120 release_gpios: 1121 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); 1122 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); 1123 disable: 1124 /* 1125 * do not call pci_disable_device on sta2x11 because it break all 1126 * other Bus masters on this EP 1127 */ 1128 return ret; 1129 } 1130 1131 /** 1132 * sta2x11_vip_remove_one - release device 1133 * @pdev: PCI device 1134 * 1135 * Undo everything done in .._init_one 1136 * 1137 * unregister video device 1138 * free interrupt 1139 * unmap ioadresses 1140 * free memory 1141 * free GPIO pins 1142 */ 1143 static void sta2x11_vip_remove_one(struct pci_dev *pdev) 1144 { 1145 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1146 struct sta2x11_vip *vip = 1147 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1148 1149 sta2x11_vip_clear_register(vip); 1150 1151 video_set_drvdata(&vip->video_dev, NULL); 1152 video_unregister_device(&vip->video_dev); 1153 free_irq(pdev->irq, vip); 1154 pci_disable_msi(pdev); 1155 vb2_queue_release(&vip->vb_vidq); 1156 pci_iounmap(pdev, vip->iomem); 1157 pci_release_regions(pdev); 1158 1159 v4l2_device_unregister(&vip->v4l2_dev); 1160 1161 vip_gpio_release(&pdev->dev, vip->config->pwr_pin, 1162 vip->config->pwr_name); 1163 vip_gpio_release(&pdev->dev, vip->config->reset_pin, 1164 vip->config->reset_name); 1165 1166 kfree(vip); 1167 /* 1168 * do not call pci_disable_device on sta2x11 because it break all 1169 * other Bus masters on this EP 1170 */ 1171 } 1172 1173 #ifdef CONFIG_PM 1174 1175 /** 1176 * sta2x11_vip_suspend - set device into power save mode 1177 * @pdev: PCI device 1178 * @state: new state of device 1179 * 1180 * all relevant registers are saved and an attempt to set a new state is made. 1181 * 1182 * return value: 0 always indicate success, 1183 * even if device could not be disabled. (workaround for hardware problem) 1184 */ 1185 static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state) 1186 { 1187 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1188 struct sta2x11_vip *vip = 1189 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1190 unsigned long flags; 1191 int i; 1192 1193 spin_lock_irqsave(&vip->slock, flags); 1194 vip->register_save_area[0] = reg_read(vip, DVP_CTL); 1195 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); 1196 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); 1197 reg_write(vip, DVP_ITM, 0); 1198 for (i = 1; i < SAVE_COUNT; i++) 1199 vip->register_save_area[i] = reg_read(vip, 4 * i); 1200 for (i = 0; i < AUX_COUNT; i++) 1201 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = 1202 reg_read(vip, registers_to_save[i]); 1203 spin_unlock_irqrestore(&vip->slock, flags); 1204 /* save pci state */ 1205 pci_save_state(pdev); 1206 if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) { 1207 /* 1208 * do not call pci_disable_device on sta2x11 because it 1209 * break all other Bus masters on this EP 1210 */ 1211 vip->disabled = 1; 1212 } 1213 1214 pr_info("VIP: suspend\n"); 1215 return 0; 1216 } 1217 1218 /** 1219 * sta2x11_vip_resume - resume device operation 1220 * @pdev : PCI device 1221 * 1222 * re-enable device, set PCI state to powered and restore registers. 1223 * resume normal device operation afterwards. 1224 * 1225 * return value: 0, no error. 1226 * 1227 * other, could not set device to power on state. 1228 */ 1229 static int sta2x11_vip_resume(struct pci_dev *pdev) 1230 { 1231 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1232 struct sta2x11_vip *vip = 1233 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1234 unsigned long flags; 1235 int ret, i; 1236 1237 pr_info("VIP: resume\n"); 1238 /* restore pci state */ 1239 if (vip->disabled) { 1240 ret = pci_enable_device(pdev); 1241 if (ret) { 1242 pr_warn("VIP: Can't enable device.\n"); 1243 return ret; 1244 } 1245 vip->disabled = 0; 1246 } 1247 ret = pci_set_power_state(pdev, PCI_D0); 1248 if (ret) { 1249 /* 1250 * do not call pci_disable_device on sta2x11 because it 1251 * break all other Bus masters on this EP 1252 */ 1253 pr_warn("VIP: Can't enable device.\n"); 1254 vip->disabled = 1; 1255 return ret; 1256 } 1257 1258 pci_restore_state(pdev); 1259 1260 spin_lock_irqsave(&vip->slock, flags); 1261 for (i = 1; i < SAVE_COUNT; i++) 1262 reg_write(vip, 4 * i, vip->register_save_area[i]); 1263 for (i = 0; i < AUX_COUNT; i++) 1264 reg_write(vip, registers_to_save[i], 1265 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); 1266 reg_write(vip, DVP_CTL, vip->register_save_area[0]); 1267 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); 1268 spin_unlock_irqrestore(&vip->slock, flags); 1269 return 0; 1270 } 1271 1272 #endif 1273 1274 static const struct pci_device_id sta2x11_vip_pci_tbl[] = { 1275 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, 1276 {0,} 1277 }; 1278 1279 static struct pci_driver sta2x11_vip_driver = { 1280 .name = KBUILD_MODNAME, 1281 .probe = sta2x11_vip_init_one, 1282 .remove = sta2x11_vip_remove_one, 1283 .id_table = sta2x11_vip_pci_tbl, 1284 #ifdef CONFIG_PM 1285 .suspend = sta2x11_vip_suspend, 1286 .resume = sta2x11_vip_resume, 1287 #endif 1288 }; 1289 1290 static int __init sta2x11_vip_init_module(void) 1291 { 1292 return pci_register_driver(&sta2x11_vip_driver); 1293 } 1294 1295 static void __exit sta2x11_vip_exit_module(void) 1296 { 1297 pci_unregister_driver(&sta2x11_vip_driver); 1298 } 1299 1300 #ifdef MODULE 1301 module_init(sta2x11_vip_init_module); 1302 module_exit(sta2x11_vip_exit_module); 1303 #else 1304 late_initcall_sync(sta2x11_vip_init_module); 1305 #endif 1306 1307 MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); 1308 MODULE_AUTHOR("Wind River"); 1309 MODULE_LICENSE("GPL v2"); 1310 MODULE_SUPPORTED_DEVICE("sta2x11 video input"); 1311 MODULE_VERSION(DRV_VERSION); 1312 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); 1313