1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * This is the driver for the STA2x11 Video Input Port. 4 * 5 * Copyright (C) 2012 ST Microelectronics 6 * author: Federico Vaga <federico.vaga@gmail.com> 7 * Copyright (C) 2010 WindRiver Systems, Inc. 8 * authors: Andreas Kies <andreas.kies@windriver.com> 9 * Vlad Lungu <vlad.lungu@windriver.com> 10 */ 11 12#include <linux/types.h> 13#include <linux/kernel.h> 14#include <linux/module.h> 15#include <linux/init.h> 16#include <linux/videodev2.h> 17#include <linux/kmod.h> 18#include <linux/pci.h> 19#include <linux/interrupt.h> 20#include <linux/io.h> 21#include <linux/gpio/consumer.h> 22#include <linux/gpio.h> 23#include <linux/i2c.h> 24#include <linux/delay.h> 25#include <media/v4l2-common.h> 26#include <media/v4l2-device.h> 27#include <media/v4l2-ctrls.h> 28#include <media/v4l2-ioctl.h> 29#include <media/v4l2-fh.h> 30#include <media/v4l2-event.h> 31#include <media/videobuf2-dma-contig.h> 32 33#include "sta2x11_vip.h" 34 35#define DRV_VERSION "1.3" 36 37#ifndef PCI_DEVICE_ID_STMICRO_VIP 38#define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D 39#endif 40 41#define MAX_FRAMES 4 42 43/*Register offsets*/ 44#define DVP_CTL 0x00 45#define DVP_TFO 0x04 46#define DVP_TFS 0x08 47#define DVP_BFO 0x0C 48#define DVP_BFS 0x10 49#define DVP_VTP 0x14 50#define DVP_VBP 0x18 51#define DVP_VMP 0x1C 52#define DVP_ITM 0x98 53#define DVP_ITS 0x9C 54#define DVP_STA 0xA0 55#define DVP_HLFLN 0xA8 56#define DVP_RGB 0xC0 57#define DVP_PKZ 0xF0 58 59/*Register fields*/ 60#define DVP_CTL_ENA 0x00000001 61#define DVP_CTL_RST 0x80000000 62#define DVP_CTL_DIS (~0x00040001) 63 64#define DVP_IT_VSB 0x00000008 65#define DVP_IT_VST 0x00000010 66#define DVP_IT_FIFO 0x00000020 67 68#define DVP_HLFLN_SD 0x00000001 69 70#define SAVE_COUNT 8 71#define AUX_COUNT 3 72#define IRQ_COUNT 1 73 74 75struct vip_buffer { 76 struct vb2_v4l2_buffer vb; 77 struct list_head list; 78 dma_addr_t dma; 79}; 80static inline struct vip_buffer *to_vip_buffer(struct vb2_v4l2_buffer *vb2) 81{ 82 return container_of(vb2, struct vip_buffer, vb); 83} 84 85/** 86 * struct sta2x11_vip - All internal data for one instance of device 87 * @v4l2_dev: device registered in v4l layer 88 * @video_dev: properties of our device 89 * @pdev: PCI device 90 * @adapter: contains I2C adapter information 91 * @register_save_area: All relevant register are saved here during suspend 92 * @decoder: contains information about video DAC 93 * @ctrl_hdl: handler for control framework 94 * @format: pixel format, fixed UYVY 95 * @std: video standard (e.g. PAL/NTSC) 96 * @input: input line for video signal ( 0 or 1 ) 97 * @disabled: Device is in power down state 98 * @slock: for excluse access of registers 99 * @vb_vidq: queue maintained by videobuf2 layer 100 * @buffer_list: list of buffer in use 101 * @sequence: sequence number of acquired buffer 102 * @active: current active buffer 103 * @lock: used in videobuf2 callback 104 * @v4l_lock: serialize its video4linux ioctls 105 * @tcount: Number of top frames 106 * @bcount: Number of bottom frames 107 * @overflow: Number of FIFO overflows 108 * @iomem: hardware base address 109 * @config: I2C and gpio config from platform 110 * 111 * All non-local data is accessed via this structure. 112 */ 113struct sta2x11_vip { 114 struct v4l2_device v4l2_dev; 115 struct video_device video_dev; 116 struct pci_dev *pdev; 117 struct i2c_adapter *adapter; 118 unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT]; 119 struct v4l2_subdev *decoder; 120 struct v4l2_ctrl_handler ctrl_hdl; 121 122 123 struct v4l2_pix_format format; 124 v4l2_std_id std; 125 unsigned int input; 126 int disabled; 127 spinlock_t slock; 128 129 struct vb2_queue vb_vidq; 130 struct list_head buffer_list; 131 unsigned int sequence; 132 struct vip_buffer *active; /* current active buffer */ 133 spinlock_t lock; /* Used in videobuf2 callback */ 134 struct mutex v4l_lock; 135 136 /* Interrupt counters */ 137 int tcount, bcount; 138 int overflow; 139 140 void __iomem *iomem; /* I/O Memory */ 141 struct vip_config *config; 142}; 143 144static const unsigned int registers_to_save[AUX_COUNT] = { 145 DVP_HLFLN, DVP_RGB, DVP_PKZ 146}; 147 148static struct v4l2_pix_format formats_50[] = { 149 { /*PAL interlaced */ 150 .width = 720, 151 .height = 576, 152 .pixelformat = V4L2_PIX_FMT_UYVY, 153 .field = V4L2_FIELD_INTERLACED, 154 .bytesperline = 720 * 2, 155 .sizeimage = 720 * 2 * 576, 156 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 157 { /*PAL top */ 158 .width = 720, 159 .height = 288, 160 .pixelformat = V4L2_PIX_FMT_UYVY, 161 .field = V4L2_FIELD_TOP, 162 .bytesperline = 720 * 2, 163 .sizeimage = 720 * 2 * 288, 164 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 165 { /*PAL bottom */ 166 .width = 720, 167 .height = 288, 168 .pixelformat = V4L2_PIX_FMT_UYVY, 169 .field = V4L2_FIELD_BOTTOM, 170 .bytesperline = 720 * 2, 171 .sizeimage = 720 * 2 * 288, 172 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 173 174}; 175 176static struct v4l2_pix_format formats_60[] = { 177 { /*NTSC interlaced */ 178 .width = 720, 179 .height = 480, 180 .pixelformat = V4L2_PIX_FMT_UYVY, 181 .field = V4L2_FIELD_INTERLACED, 182 .bytesperline = 720 * 2, 183 .sizeimage = 720 * 2 * 480, 184 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 185 { /*NTSC top */ 186 .width = 720, 187 .height = 240, 188 .pixelformat = V4L2_PIX_FMT_UYVY, 189 .field = V4L2_FIELD_TOP, 190 .bytesperline = 720 * 2, 191 .sizeimage = 720 * 2 * 240, 192 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 193 { /*NTSC bottom */ 194 .width = 720, 195 .height = 240, 196 .pixelformat = V4L2_PIX_FMT_UYVY, 197 .field = V4L2_FIELD_BOTTOM, 198 .bytesperline = 720 * 2, 199 .sizeimage = 720 * 2 * 240, 200 .colorspace = V4L2_COLORSPACE_SMPTE170M}, 201}; 202 203/* Write VIP register */ 204static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val) 205{ 206 iowrite32((val), (vip->iomem)+(reg)); 207} 208/* Read VIP register */ 209static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg) 210{ 211 return ioread32((vip->iomem)+(reg)); 212} 213/* Start DMA acquisition */ 214static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf) 215{ 216 unsigned long offset = 0; 217 218 if (vip->format.field == V4L2_FIELD_INTERLACED) 219 offset = vip->format.width * 2; 220 221 spin_lock_irq(&vip->slock); 222 /* Enable acquisition */ 223 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) | DVP_CTL_ENA); 224 /* Set Top and Bottom Field memory address */ 225 reg_write(vip, DVP_VTP, (u32)vip_buf->dma); 226 reg_write(vip, DVP_VBP, (u32)vip_buf->dma + offset); 227 spin_unlock_irq(&vip->slock); 228} 229 230/* Fetch the next buffer to activate */ 231static void vip_active_buf_next(struct sta2x11_vip *vip) 232{ 233 /* Get the next buffer */ 234 spin_lock(&vip->lock); 235 if (list_empty(&vip->buffer_list)) {/* No available buffer */ 236 spin_unlock(&vip->lock); 237 return; 238 } 239 vip->active = list_first_entry(&vip->buffer_list, 240 struct vip_buffer, 241 list); 242 /* Reset Top and Bottom counter */ 243 vip->tcount = 0; 244 vip->bcount = 0; 245 spin_unlock(&vip->lock); 246 if (vb2_is_streaming(&vip->vb_vidq)) { /* streaming is on */ 247 start_dma(vip, vip->active); /* start dma capture */ 248 } 249} 250 251 252/* Videobuf2 Operations */ 253static int queue_setup(struct vb2_queue *vq, 254 unsigned int *nbuffers, unsigned int *nplanes, 255 unsigned int sizes[], struct device *alloc_devs[]) 256{ 257 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 258 259 if (!(*nbuffers) || *nbuffers < MAX_FRAMES) 260 *nbuffers = MAX_FRAMES; 261 262 *nplanes = 1; 263 sizes[0] = vip->format.sizeimage; 264 265 vip->sequence = 0; 266 vip->active = NULL; 267 vip->tcount = 0; 268 vip->bcount = 0; 269 270 return 0; 271}; 272static int buffer_init(struct vb2_buffer *vb) 273{ 274 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 275 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 276 277 vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, 0); 278 INIT_LIST_HEAD(&vip_buf->list); 279 return 0; 280} 281 282static int buffer_prepare(struct vb2_buffer *vb) 283{ 284 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 285 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 286 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 287 unsigned long size; 288 289 size = vip->format.sizeimage; 290 if (vb2_plane_size(vb, 0) < size) { 291 v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n", 292 vb2_plane_size(vb, 0), size); 293 return -EINVAL; 294 } 295 296 vb2_set_plane_payload(&vip_buf->vb.vb2_buf, 0, size); 297 298 return 0; 299} 300static void buffer_queue(struct vb2_buffer *vb) 301{ 302 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 303 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 304 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 305 306 spin_lock(&vip->lock); 307 list_add_tail(&vip_buf->list, &vip->buffer_list); 308 if (!vip->active) { /* No active buffer, active the first one */ 309 vip->active = list_first_entry(&vip->buffer_list, 310 struct vip_buffer, 311 list); 312 if (vb2_is_streaming(&vip->vb_vidq)) /* streaming is on */ 313 start_dma(vip, vip_buf); /* start dma capture */ 314 } 315 spin_unlock(&vip->lock); 316} 317static void buffer_finish(struct vb2_buffer *vb) 318{ 319 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 320 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); 321 struct vip_buffer *vip_buf = to_vip_buffer(vbuf); 322 323 /* Buffer handled, remove it from the list */ 324 spin_lock(&vip->lock); 325 list_del_init(&vip_buf->list); 326 spin_unlock(&vip->lock); 327 328 if (vb2_is_streaming(vb->vb2_queue)) 329 vip_active_buf_next(vip); 330} 331 332static int start_streaming(struct vb2_queue *vq, unsigned int count) 333{ 334 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 335 336 spin_lock_irq(&vip->slock); 337 /* Enable interrupt VSYNC Top and Bottom*/ 338 reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST); 339 spin_unlock_irq(&vip->slock); 340 341 if (count) 342 start_dma(vip, vip->active); 343 344 return 0; 345} 346 347/* abort streaming and wait for last buffer */ 348static void stop_streaming(struct vb2_queue *vq) 349{ 350 struct sta2x11_vip *vip = vb2_get_drv_priv(vq); 351 struct vip_buffer *vip_buf, *node; 352 353 /* Disable acquisition */ 354 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 355 /* Disable all interrupts */ 356 reg_write(vip, DVP_ITM, 0); 357 358 /* Release all active buffers */ 359 spin_lock(&vip->lock); 360 list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) { 361 vb2_buffer_done(&vip_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 362 list_del(&vip_buf->list); 363 } 364 spin_unlock(&vip->lock); 365} 366 367static const struct vb2_ops vip_video_qops = { 368 .queue_setup = queue_setup, 369 .buf_init = buffer_init, 370 .buf_prepare = buffer_prepare, 371 .buf_finish = buffer_finish, 372 .buf_queue = buffer_queue, 373 .start_streaming = start_streaming, 374 .stop_streaming = stop_streaming, 375 .wait_prepare = vb2_ops_wait_prepare, 376 .wait_finish = vb2_ops_wait_finish, 377}; 378 379 380/* File Operations */ 381static const struct v4l2_file_operations vip_fops = { 382 .owner = THIS_MODULE, 383 .open = v4l2_fh_open, 384 .release = vb2_fop_release, 385 .unlocked_ioctl = video_ioctl2, 386 .read = vb2_fop_read, 387 .mmap = vb2_fop_mmap, 388 .poll = vb2_fop_poll 389}; 390 391 392/** 393 * vidioc_querycap - return capabilities of device 394 * @file: descriptor of device 395 * @cap: contains return values 396 * @priv: unused 397 * 398 * the capabilities of the device are returned 399 * 400 * return value: 0, no error. 401 */ 402static int vidioc_querycap(struct file *file, void *priv, 403 struct v4l2_capability *cap) 404{ 405 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); 406 strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card)); 407 return 0; 408} 409 410/** 411 * vidioc_s_std - set video standard 412 * @file: descriptor of device 413 * @std: contains standard to be set 414 * @priv: unused 415 * 416 * the video standard is set 417 * 418 * return value: 0, no error. 419 * 420 * -EIO, no input signal detected 421 * 422 * other, returned from video DAC. 423 */ 424static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) 425{ 426 struct sta2x11_vip *vip = video_drvdata(file); 427 428 /* 429 * This is here for backwards compatibility only. 430 * The use of V4L2_STD_ALL to trigger a querystd is non-standard. 431 */ 432 if (std == V4L2_STD_ALL) { 433 v4l2_subdev_call(vip->decoder, video, querystd, &std); 434 if (std == V4L2_STD_UNKNOWN) 435 return -EIO; 436 } 437 438 if (vip->std != std) { 439 vip->std = std; 440 if (V4L2_STD_525_60 & std) 441 vip->format = formats_60[0]; 442 else 443 vip->format = formats_50[0]; 444 } 445 446 return v4l2_subdev_call(vip->decoder, video, s_std, std); 447} 448 449/** 450 * vidioc_g_std - get video standard 451 * @file: descriptor of device 452 * @priv: unused 453 * @std: contains return values 454 * 455 * the current video standard is returned 456 * 457 * return value: 0, no error. 458 */ 459static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) 460{ 461 struct sta2x11_vip *vip = video_drvdata(file); 462 463 *std = vip->std; 464 return 0; 465} 466 467/** 468 * vidioc_querystd - get possible video standards 469 * @file: descriptor of device 470 * @priv: unused 471 * @std: contains return values 472 * 473 * all possible video standards are returned 474 * 475 * return value: delivered by video DAC routine. 476 */ 477static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) 478{ 479 struct sta2x11_vip *vip = video_drvdata(file); 480 481 return v4l2_subdev_call(vip->decoder, video, querystd, std); 482} 483 484static int vidioc_enum_input(struct file *file, void *priv, 485 struct v4l2_input *inp) 486{ 487 if (inp->index > 1) 488 return -EINVAL; 489 490 inp->type = V4L2_INPUT_TYPE_CAMERA; 491 inp->std = V4L2_STD_ALL; 492 sprintf(inp->name, "Camera %u", inp->index); 493 494 return 0; 495} 496 497/** 498 * vidioc_s_input - set input line 499 * @file: descriptor of device 500 * @priv: unused 501 * @i: new input line number 502 * 503 * the current active input line is set 504 * 505 * return value: 0, no error. 506 * 507 * -EINVAL, line number out of range 508 */ 509static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 510{ 511 struct sta2x11_vip *vip = video_drvdata(file); 512 int ret; 513 514 if (i > 1) 515 return -EINVAL; 516 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); 517 518 if (!ret) 519 vip->input = i; 520 521 return 0; 522} 523 524/** 525 * vidioc_g_input - return input line 526 * @file: descriptor of device 527 * @priv: unused 528 * @i: returned input line number 529 * 530 * the current active input line is returned 531 * 532 * return value: always 0. 533 */ 534static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 535{ 536 struct sta2x11_vip *vip = video_drvdata(file); 537 538 *i = vip->input; 539 return 0; 540} 541 542/** 543 * vidioc_enum_fmt_vid_cap - return video capture format 544 * @file: descriptor of device 545 * @priv: unused 546 * @f: returned format information 547 * 548 * returns name and format of video capture 549 * Only UYVY is supported by hardware. 550 * 551 * return value: always 0. 552 */ 553static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 554 struct v4l2_fmtdesc *f) 555{ 556 557 if (f->index != 0) 558 return -EINVAL; 559 560 f->pixelformat = V4L2_PIX_FMT_UYVY; 561 return 0; 562} 563 564/** 565 * vidioc_try_fmt_vid_cap - set video capture format 566 * @file: descriptor of device 567 * @priv: unused 568 * @f: new format 569 * 570 * new video format is set which includes width and 571 * field type. width is fixed to 720, no scaling. 572 * Only UYVY is supported by this hardware. 573 * the minimum height is 200, the maximum is 576 (PAL) 574 * 575 * return value: 0, no error 576 * 577 * -EINVAL, pixel or field format not supported 578 * 579 */ 580static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 581 struct v4l2_format *f) 582{ 583 struct sta2x11_vip *vip = video_drvdata(file); 584 int interlace_lim; 585 586 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { 587 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n"); 588 return -EINVAL; 589 } 590 591 if (V4L2_STD_525_60 & vip->std) 592 interlace_lim = 240; 593 else 594 interlace_lim = 288; 595 596 switch (f->fmt.pix.field) { 597 default: 598 case V4L2_FIELD_ANY: 599 if (interlace_lim < f->fmt.pix.height) 600 f->fmt.pix.field = V4L2_FIELD_INTERLACED; 601 else 602 f->fmt.pix.field = V4L2_FIELD_BOTTOM; 603 break; 604 case V4L2_FIELD_TOP: 605 case V4L2_FIELD_BOTTOM: 606 if (interlace_lim < f->fmt.pix.height) 607 f->fmt.pix.height = interlace_lim; 608 break; 609 case V4L2_FIELD_INTERLACED: 610 break; 611 } 612 613 /* It is the only supported format */ 614 f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; 615 f->fmt.pix.height &= ~1; 616 if (2 * interlace_lim < f->fmt.pix.height) 617 f->fmt.pix.height = 2 * interlace_lim; 618 if (200 > f->fmt.pix.height) 619 f->fmt.pix.height = 200; 620 f->fmt.pix.width = 720; 621 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 622 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; 623 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 624 return 0; 625} 626 627/** 628 * vidioc_s_fmt_vid_cap - set current video format parameters 629 * @file: descriptor of device 630 * @priv: unused 631 * @f: returned format information 632 * 633 * set new capture format 634 * return value: 0, no error 635 * 636 * other, delivered by video DAC routine. 637 */ 638static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 639 struct v4l2_format *f) 640{ 641 struct sta2x11_vip *vip = video_drvdata(file); 642 unsigned int t_stop, b_stop, pitch; 643 int ret; 644 645 ret = vidioc_try_fmt_vid_cap(file, priv, f); 646 if (ret) 647 return ret; 648 649 if (vb2_is_busy(&vip->vb_vidq)) { 650 /* Can't change format during acquisition */ 651 v4l2_err(&vip->v4l2_dev, "device busy\n"); 652 return -EBUSY; 653 } 654 vip->format = f->fmt.pix; 655 switch (vip->format.field) { 656 case V4L2_FIELD_INTERLACED: 657 t_stop = ((vip->format.height / 2 - 1) << 16) | 658 (2 * vip->format.width - 1); 659 b_stop = t_stop; 660 pitch = 4 * vip->format.width; 661 break; 662 case V4L2_FIELD_TOP: 663 t_stop = ((vip->format.height - 1) << 16) | 664 (2 * vip->format.width - 1); 665 b_stop = (0 << 16) | (2 * vip->format.width - 1); 666 pitch = 2 * vip->format.width; 667 break; 668 case V4L2_FIELD_BOTTOM: 669 t_stop = (0 << 16) | (2 * vip->format.width - 1); 670 b_stop = (vip->format.height << 16) | 671 (2 * vip->format.width - 1); 672 pitch = 2 * vip->format.width; 673 break; 674 default: 675 v4l2_err(&vip->v4l2_dev, "unknown field format\n"); 676 return -EINVAL; 677 } 678 679 spin_lock_irq(&vip->slock); 680 /* Y-X Top Field Offset */ 681 reg_write(vip, DVP_TFO, 0); 682 /* Y-X Bottom Field Offset */ 683 reg_write(vip, DVP_BFO, 0); 684 /* Y-X Top Field Stop*/ 685 reg_write(vip, DVP_TFS, t_stop); 686 /* Y-X Bottom Field Stop */ 687 reg_write(vip, DVP_BFS, b_stop); 688 /* Video Memory Pitch */ 689 reg_write(vip, DVP_VMP, pitch); 690 spin_unlock_irq(&vip->slock); 691 692 return 0; 693} 694 695/** 696 * vidioc_g_fmt_vid_cap - get current video format parameters 697 * @file: descriptor of device 698 * @priv: unused 699 * @f: contains format information 700 * 701 * returns current video format parameters 702 * 703 * return value: 0, always successful 704 */ 705static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 706 struct v4l2_format *f) 707{ 708 struct sta2x11_vip *vip = video_drvdata(file); 709 710 f->fmt.pix = vip->format; 711 712 return 0; 713} 714 715static const struct v4l2_ioctl_ops vip_ioctl_ops = { 716 .vidioc_querycap = vidioc_querycap, 717 /* FMT handling */ 718 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 719 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 720 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 721 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 722 /* Buffer handlers */ 723 .vidioc_create_bufs = vb2_ioctl_create_bufs, 724 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 725 .vidioc_reqbufs = vb2_ioctl_reqbufs, 726 .vidioc_querybuf = vb2_ioctl_querybuf, 727 .vidioc_qbuf = vb2_ioctl_qbuf, 728 .vidioc_dqbuf = vb2_ioctl_dqbuf, 729 /* Stream on/off */ 730 .vidioc_streamon = vb2_ioctl_streamon, 731 .vidioc_streamoff = vb2_ioctl_streamoff, 732 /* Standard handling */ 733 .vidioc_g_std = vidioc_g_std, 734 .vidioc_s_std = vidioc_s_std, 735 .vidioc_querystd = vidioc_querystd, 736 /* Input handling */ 737 .vidioc_enum_input = vidioc_enum_input, 738 .vidioc_g_input = vidioc_g_input, 739 .vidioc_s_input = vidioc_s_input, 740 /* Log status ioctl */ 741 .vidioc_log_status = v4l2_ctrl_log_status, 742 /* Event handling */ 743 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 744 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 745}; 746 747static const struct video_device video_dev_template = { 748 .name = KBUILD_MODNAME, 749 .release = video_device_release_empty, 750 .fops = &vip_fops, 751 .ioctl_ops = &vip_ioctl_ops, 752 .tvnorms = V4L2_STD_ALL, 753 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 754 V4L2_CAP_STREAMING, 755}; 756 757/** 758 * vip_irq - interrupt routine 759 * @irq: Number of interrupt ( not used, correct number is assumed ) 760 * @data: local data structure containing all information 761 * 762 * check for both frame interrupts set ( top and bottom ). 763 * check FIFO overflow, but limit number of log messages after open. 764 * signal a complete buffer if done 765 * 766 * return value: IRQ_NONE, interrupt was not generated by VIP 767 * 768 * IRQ_HANDLED, interrupt done. 769 */ 770static irqreturn_t vip_irq(int irq, void *data) 771{ 772 struct sta2x11_vip *vip = data; 773 unsigned int status; 774 775 status = reg_read(vip, DVP_ITS); 776 777 if (!status) /* No interrupt to handle */ 778 return IRQ_NONE; 779 780 if (status & DVP_IT_FIFO) 781 if (vip->overflow++ > 5) 782 pr_info("VIP: fifo overflow\n"); 783 784 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { 785 /* this is bad, we are too slow, hope the condition is gone 786 * on the next frame */ 787 return IRQ_HANDLED; 788 } 789 790 if (status & DVP_IT_VST) 791 if ((++vip->tcount) < 2) 792 return IRQ_HANDLED; 793 if (status & DVP_IT_VSB) { 794 vip->bcount++; 795 return IRQ_HANDLED; 796 } 797 798 if (vip->active) { /* Acquisition is over on this buffer */ 799 /* Disable acquisition */ 800 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); 801 /* Remove the active buffer from the list */ 802 vip->active->vb.vb2_buf.timestamp = ktime_get_ns(); 803 vip->active->vb.sequence = vip->sequence++; 804 vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE); 805 } 806 807 return IRQ_HANDLED; 808} 809 810static void sta2x11_vip_init_register(struct sta2x11_vip *vip) 811{ 812 /* Register initialization */ 813 spin_lock_irq(&vip->slock); 814 /* Clean interrupt */ 815 reg_read(vip, DVP_ITS); 816 /* Enable Half Line per vertical */ 817 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); 818 /* Reset VIP control */ 819 reg_write(vip, DVP_CTL, DVP_CTL_RST); 820 /* Clear VIP control */ 821 reg_write(vip, DVP_CTL, 0); 822 spin_unlock_irq(&vip->slock); 823} 824static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) 825{ 826 spin_lock_irq(&vip->slock); 827 /* Disable interrupt */ 828 reg_write(vip, DVP_ITM, 0); 829 /* Reset VIP Control */ 830 reg_write(vip, DVP_CTL, DVP_CTL_RST); 831 /* Clear VIP Control */ 832 reg_write(vip, DVP_CTL, 0); 833 /* Clean VIP Interrupt */ 834 reg_read(vip, DVP_ITS); 835 spin_unlock_irq(&vip->slock); 836} 837static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) 838{ 839 int err; 840 841 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); 842 if (err) { 843 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); 844 return err; 845 } 846 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); 847 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 848 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; 849 vip->vb_vidq.drv_priv = vip; 850 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); 851 vip->vb_vidq.ops = &vip_video_qops; 852 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; 853 vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 854 vip->vb_vidq.dev = &vip->pdev->dev; 855 vip->vb_vidq.lock = &vip->v4l_lock; 856 err = vb2_queue_init(&vip->vb_vidq); 857 if (err) 858 return err; 859 INIT_LIST_HEAD(&vip->buffer_list); 860 spin_lock_init(&vip->lock); 861 return 0; 862} 863 864static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) 865{ 866 /* 867 * Inititialize an empty control so VIP can inerithing controls 868 * from ADV7180 869 */ 870 v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); 871 872 vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; 873 if (vip->ctrl_hdl.error) { 874 int err = vip->ctrl_hdl.error; 875 876 v4l2_ctrl_handler_free(&vip->ctrl_hdl); 877 return err; 878 } 879 880 return 0; 881} 882 883/** 884 * vip_gpio_reserve - reserve gpio pin 885 * @dev: device 886 * @pin: GPIO pin number 887 * @dir: direction, input or output 888 * @name: GPIO pin name 889 * 890 */ 891static int vip_gpio_reserve(struct device *dev, int pin, int dir, 892 const char *name) 893{ 894 struct gpio_desc *desc = gpio_to_desc(pin); 895 int ret = -ENODEV; 896 897 if (!gpio_is_valid(pin)) 898 return ret; 899 900 ret = gpio_request(pin, name); 901 if (ret) { 902 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); 903 return ret; 904 } 905 906 ret = gpiod_direction_output(desc, dir); 907 if (ret) { 908 dev_err(dev, "Failed to set direction for pin %d (%s)\n", 909 pin, name); 910 gpio_free(pin); 911 return ret; 912 } 913 914 ret = gpiod_export(desc, false); 915 if (ret) { 916 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); 917 gpio_free(pin); 918 return ret; 919 } 920 921 return 0; 922} 923 924/** 925 * vip_gpio_release - release gpio pin 926 * @dev: device 927 * @pin: GPIO pin number 928 * @name: GPIO pin name 929 * 930 */ 931static void vip_gpio_release(struct device *dev, int pin, const char *name) 932{ 933 if (gpio_is_valid(pin)) { 934 struct gpio_desc *desc = gpio_to_desc(pin); 935 936 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); 937 gpiod_unexport(desc); 938 gpio_free(pin); 939 } 940} 941 942/** 943 * sta2x11_vip_init_one - init one instance of video device 944 * @pdev: PCI device 945 * @ent: (not used) 946 * 947 * allocate reset pins for DAC. 948 * Reset video DAC, this is done via reset line. 949 * allocate memory for managing device 950 * request interrupt 951 * map IO region 952 * register device 953 * find and initialize video DAC 954 * 955 * return value: 0, no error 956 * 957 * -ENOMEM, no memory 958 * 959 * -ENODEV, device could not be detected or registered 960 */ 961static int sta2x11_vip_init_one(struct pci_dev *pdev, 962 const struct pci_device_id *ent) 963{ 964 int ret; 965 struct sta2x11_vip *vip; 966 struct vip_config *config; 967 968 /* Check if hardware support 26-bit DMA */ 969 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { 970 dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); 971 return -EINVAL; 972 } 973 /* Enable PCI */ 974 ret = pci_enable_device(pdev); 975 if (ret) 976 return ret; 977 978 /* Get VIP platform data */ 979 config = dev_get_platdata(&pdev->dev); 980 if (!config) { 981 dev_info(&pdev->dev, "VIP slot disabled\n"); 982 ret = -EINVAL; 983 goto disable; 984 } 985 986 /* Power configuration */ 987 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, 988 config->pwr_name); 989 if (ret) 990 goto disable; 991 992 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, 993 config->reset_name); 994 if (ret) { 995 vip_gpio_release(&pdev->dev, config->pwr_pin, 996 config->pwr_name); 997 goto disable; 998 } 999 1000 if (gpio_is_valid(config->pwr_pin)) { 1001 /* Datasheet says 5ms between PWR and RST */ 1002 usleep_range(5000, 25000); 1003 gpio_direction_output(config->pwr_pin, 1); 1004 } 1005 1006 if (gpio_is_valid(config->reset_pin)) { 1007 /* Datasheet says 5ms between PWR and RST */ 1008 usleep_range(5000, 25000); 1009 gpio_direction_output(config->reset_pin, 1); 1010 } 1011 usleep_range(5000, 25000); 1012 1013 /* Allocate a new VIP instance */ 1014 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); 1015 if (!vip) { 1016 ret = -ENOMEM; 1017 goto release_gpios; 1018 } 1019 vip->pdev = pdev; 1020 vip->std = V4L2_STD_PAL; 1021 vip->format = formats_50[0]; 1022 vip->config = config; 1023 mutex_init(&vip->v4l_lock); 1024 1025 ret = sta2x11_vip_init_controls(vip); 1026 if (ret) 1027 goto free_mem; 1028 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); 1029 if (ret) 1030 goto free_mem; 1031 1032 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", 1033 (unsigned long)pci_resource_start(pdev, 0), 1034 (unsigned long)pci_resource_len(pdev, 0), pdev->irq); 1035 1036 pci_set_master(pdev); 1037 1038 ret = pci_request_regions(pdev, KBUILD_MODNAME); 1039 if (ret) 1040 goto unreg; 1041 1042 vip->iomem = pci_iomap(pdev, 0, 0x100); 1043 if (!vip->iomem) { 1044 ret = -ENOMEM; 1045 goto release; 1046 } 1047 1048 pci_enable_msi(pdev); 1049 1050 /* Initialize buffer */ 1051 ret = sta2x11_vip_init_buffer(vip); 1052 if (ret) 1053 goto unmap; 1054 1055 spin_lock_init(&vip->slock); 1056 1057 ret = request_irq(pdev->irq, vip_irq, IRQF_SHARED, KBUILD_MODNAME, vip); 1058 if (ret) { 1059 dev_err(&pdev->dev, "request_irq failed\n"); 1060 ret = -ENODEV; 1061 goto release_buf; 1062 } 1063 1064 /* Initialize and register video device */ 1065 vip->video_dev = video_dev_template; 1066 vip->video_dev.v4l2_dev = &vip->v4l2_dev; 1067 vip->video_dev.queue = &vip->vb_vidq; 1068 vip->video_dev.lock = &vip->v4l_lock; 1069 video_set_drvdata(&vip->video_dev, vip); 1070 1071 ret = video_register_device(&vip->video_dev, VFL_TYPE_VIDEO, -1); 1072 if (ret) 1073 goto vrelease; 1074 1075 /* Get ADV7180 subdevice */ 1076 vip->adapter = i2c_get_adapter(vip->config->i2c_id); 1077 if (!vip->adapter) { 1078 ret = -ENODEV; 1079 dev_err(&pdev->dev, "no I2C adapter found\n"); 1080 goto vunreg; 1081 } 1082 1083 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, 1084 "adv7180", vip->config->i2c_addr, 1085 NULL); 1086 if (!vip->decoder) { 1087 ret = -ENODEV; 1088 dev_err(&pdev->dev, "no decoder found\n"); 1089 goto vunreg; 1090 } 1091 1092 i2c_put_adapter(vip->adapter); 1093 v4l2_subdev_call(vip->decoder, core, init, 0); 1094 1095 sta2x11_vip_init_register(vip); 1096 1097 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); 1098 return 0; 1099 1100vunreg: 1101 video_set_drvdata(&vip->video_dev, NULL); 1102vrelease: 1103 vb2_video_unregister_device(&vip->video_dev); 1104 free_irq(pdev->irq, vip); 1105release_buf: 1106 pci_disable_msi(pdev); 1107unmap: 1108 pci_iounmap(pdev, vip->iomem); 1109release: 1110 pci_release_regions(pdev); 1111unreg: 1112 v4l2_device_unregister(&vip->v4l2_dev); 1113free_mem: 1114 kfree(vip); 1115release_gpios: 1116 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); 1117 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); 1118disable: 1119 /* 1120 * do not call pci_disable_device on sta2x11 because it break all 1121 * other Bus masters on this EP 1122 */ 1123 return ret; 1124} 1125 1126/** 1127 * sta2x11_vip_remove_one - release device 1128 * @pdev: PCI device 1129 * 1130 * Undo everything done in .._init_one 1131 * 1132 * unregister video device 1133 * free interrupt 1134 * unmap ioadresses 1135 * free memory 1136 * free GPIO pins 1137 */ 1138static void sta2x11_vip_remove_one(struct pci_dev *pdev) 1139{ 1140 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); 1141 struct sta2x11_vip *vip = 1142 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1143 1144 sta2x11_vip_clear_register(vip); 1145 1146 video_set_drvdata(&vip->video_dev, NULL); 1147 vb2_video_unregister_device(&vip->video_dev); 1148 free_irq(pdev->irq, vip); 1149 pci_disable_msi(pdev); 1150 pci_iounmap(pdev, vip->iomem); 1151 pci_release_regions(pdev); 1152 1153 v4l2_device_unregister(&vip->v4l2_dev); 1154 1155 vip_gpio_release(&pdev->dev, vip->config->pwr_pin, 1156 vip->config->pwr_name); 1157 vip_gpio_release(&pdev->dev, vip->config->reset_pin, 1158 vip->config->reset_name); 1159 1160 kfree(vip); 1161 /* 1162 * do not call pci_disable_device on sta2x11 because it break all 1163 * other Bus masters on this EP 1164 */ 1165} 1166 1167/** 1168 * sta2x11_vip_suspend - set device into power save mode 1169 * @dev_d: PCI device 1170 * 1171 * all relevant registers are saved and an attempt to set a new state is made. 1172 * 1173 * return value: 0 always indicate success, 1174 * even if device could not be disabled. (workaround for hardware problem) 1175 */ 1176static int __maybe_unused sta2x11_vip_suspend(struct device *dev_d) 1177{ 1178 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev_d); 1179 struct sta2x11_vip *vip = 1180 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1181 unsigned long flags; 1182 int i; 1183 1184 spin_lock_irqsave(&vip->slock, flags); 1185 vip->register_save_area[0] = reg_read(vip, DVP_CTL); 1186 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); 1187 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); 1188 reg_write(vip, DVP_ITM, 0); 1189 for (i = 1; i < SAVE_COUNT; i++) 1190 vip->register_save_area[i] = reg_read(vip, 4 * i); 1191 for (i = 0; i < AUX_COUNT; i++) 1192 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = 1193 reg_read(vip, registers_to_save[i]); 1194 spin_unlock_irqrestore(&vip->slock, flags); 1195 1196 vip->disabled = 1; 1197 1198 pr_info("VIP: suspend\n"); 1199 return 0; 1200} 1201 1202/** 1203 * sta2x11_vip_resume - resume device operation 1204 * @dev_d : PCI device 1205 * 1206 * return value: 0, no error. 1207 * 1208 * other, could not set device to power on state. 1209 */ 1210static int __maybe_unused sta2x11_vip_resume(struct device *dev_d) 1211{ 1212 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev_d); 1213 struct sta2x11_vip *vip = 1214 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); 1215 unsigned long flags; 1216 int i; 1217 1218 pr_info("VIP: resume\n"); 1219 1220 vip->disabled = 0; 1221 1222 spin_lock_irqsave(&vip->slock, flags); 1223 for (i = 1; i < SAVE_COUNT; i++) 1224 reg_write(vip, 4 * i, vip->register_save_area[i]); 1225 for (i = 0; i < AUX_COUNT; i++) 1226 reg_write(vip, registers_to_save[i], 1227 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); 1228 reg_write(vip, DVP_CTL, vip->register_save_area[0]); 1229 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); 1230 spin_unlock_irqrestore(&vip->slock, flags); 1231 return 0; 1232} 1233 1234static const struct pci_device_id sta2x11_vip_pci_tbl[] = { 1235 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, 1236 {0,} 1237}; 1238 1239static SIMPLE_DEV_PM_OPS(sta2x11_vip_pm_ops, 1240 sta2x11_vip_suspend, 1241 sta2x11_vip_resume); 1242 1243static struct pci_driver sta2x11_vip_driver = { 1244 .name = KBUILD_MODNAME, 1245 .probe = sta2x11_vip_init_one, 1246 .remove = sta2x11_vip_remove_one, 1247 .id_table = sta2x11_vip_pci_tbl, 1248 .driver.pm = &sta2x11_vip_pm_ops, 1249}; 1250 1251static int __init sta2x11_vip_init_module(void) 1252{ 1253 return pci_register_driver(&sta2x11_vip_driver); 1254} 1255 1256static void __exit sta2x11_vip_exit_module(void) 1257{ 1258 pci_unregister_driver(&sta2x11_vip_driver); 1259} 1260 1261#ifdef MODULE 1262module_init(sta2x11_vip_init_module); 1263module_exit(sta2x11_vip_exit_module); 1264#else 1265late_initcall_sync(sta2x11_vip_init_module); 1266#endif 1267 1268MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); 1269MODULE_AUTHOR("Wind River"); 1270MODULE_LICENSE("GPL v2"); 1271MODULE_VERSION(DRV_VERSION); 1272MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); 1273