Richard Röjfors | 9eae42e | 2010-11-08 10:45:44 -0300 | [diff] [blame] | 1 | /* |
| 2 | * timblogiw.c timberdale FPGA LogiWin Video In driver |
| 3 | * Copyright (c) 2009-2010 Intel Corporation |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 17 | */ |
| 18 | |
| 19 | /* Supports: |
| 20 | * Timberdale FPGA LogiWin Video In |
| 21 | */ |
| 22 | |
| 23 | #include <linux/version.h> |
| 24 | #include <linux/platform_device.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/dmaengine.h> |
| 27 | #include <linux/scatterlist.h> |
| 28 | #include <linux/interrupt.h> |
| 29 | #include <linux/list.h> |
| 30 | #include <linux/i2c.h> |
| 31 | #include <media/v4l2-ioctl.h> |
| 32 | #include <media/v4l2-device.h> |
| 33 | #include <media/videobuf-dma-contig.h> |
| 34 | #include <media/timb_video.h> |
| 35 | |
| 36 | #define DRIVER_NAME "timb-video" |
| 37 | |
| 38 | #define TIMBLOGIWIN_NAME "Timberdale Video-In" |
| 39 | #define TIMBLOGIW_VERSION_CODE 0x04 |
| 40 | |
| 41 | #define TIMBLOGIW_LINES_PER_DESC 44 |
| 42 | #define TIMBLOGIW_MAX_VIDEO_MEM 16 |
| 43 | |
| 44 | #define TIMBLOGIW_HAS_DECODER(lw) (lw->pdata.encoder.module_name) |
| 45 | |
| 46 | |
| 47 | struct timblogiw { |
| 48 | struct video_device video_dev; |
| 49 | struct v4l2_device v4l2_dev; /* mutual exclusion */ |
| 50 | struct mutex lock; |
| 51 | struct device *dev; |
| 52 | struct timb_video_platform_data pdata; |
| 53 | struct v4l2_subdev *sd_enc; /* encoder */ |
| 54 | bool opened; |
| 55 | }; |
| 56 | |
| 57 | struct timblogiw_tvnorm { |
| 58 | v4l2_std_id std; |
| 59 | u16 width; |
| 60 | u16 height; |
| 61 | u8 fps; |
| 62 | }; |
| 63 | |
| 64 | struct timblogiw_fh { |
| 65 | struct videobuf_queue vb_vidq; |
| 66 | struct timblogiw_tvnorm const *cur_norm; |
| 67 | struct list_head capture; |
| 68 | struct dma_chan *chan; |
| 69 | spinlock_t queue_lock; /* mutual exclusion */ |
| 70 | unsigned int frame_count; |
| 71 | }; |
| 72 | |
| 73 | struct timblogiw_buffer { |
| 74 | /* common v4l buffer stuff -- must be first */ |
| 75 | struct videobuf_buffer vb; |
| 76 | struct scatterlist sg[16]; |
| 77 | dma_cookie_t cookie; |
| 78 | struct timblogiw_fh *fh; |
| 79 | }; |
| 80 | |
| 81 | const struct timblogiw_tvnorm timblogiw_tvnorms[] = { |
| 82 | { |
| 83 | .std = V4L2_STD_PAL, |
| 84 | .width = 720, |
| 85 | .height = 576, |
| 86 | .fps = 25 |
| 87 | }, |
| 88 | { |
| 89 | .std = V4L2_STD_NTSC, |
| 90 | .width = 720, |
| 91 | .height = 480, |
| 92 | .fps = 30 |
| 93 | } |
| 94 | }; |
| 95 | |
| 96 | static int timblogiw_bytes_per_line(const struct timblogiw_tvnorm *norm) |
| 97 | { |
| 98 | return norm->width * 2; |
| 99 | } |
| 100 | |
| 101 | |
| 102 | static int timblogiw_frame_size(const struct timblogiw_tvnorm *norm) |
| 103 | { |
| 104 | return norm->height * timblogiw_bytes_per_line(norm); |
| 105 | } |
| 106 | |
| 107 | static const struct timblogiw_tvnorm *timblogiw_get_norm(const v4l2_std_id std) |
| 108 | { |
| 109 | int i; |
| 110 | for (i = 0; i < ARRAY_SIZE(timblogiw_tvnorms); i++) |
| 111 | if (timblogiw_tvnorms[i].std & std) |
| 112 | return timblogiw_tvnorms + i; |
| 113 | |
| 114 | /* default to first element */ |
| 115 | return timblogiw_tvnorms; |
| 116 | } |
| 117 | |
| 118 | static void timblogiw_dma_cb(void *data) |
| 119 | { |
| 120 | struct timblogiw_buffer *buf = data; |
| 121 | struct timblogiw_fh *fh = buf->fh; |
| 122 | struct videobuf_buffer *vb = &buf->vb; |
| 123 | |
| 124 | spin_lock(&fh->queue_lock); |
| 125 | |
| 126 | /* mark the transfer done */ |
| 127 | buf->cookie = -1; |
| 128 | |
| 129 | fh->frame_count++; |
| 130 | |
| 131 | if (vb->state != VIDEOBUF_ERROR) { |
| 132 | list_del(&vb->queue); |
| 133 | do_gettimeofday(&vb->ts); |
| 134 | vb->field_count = fh->frame_count * 2; |
| 135 | vb->state = VIDEOBUF_DONE; |
| 136 | |
| 137 | wake_up(&vb->done); |
| 138 | } |
| 139 | |
| 140 | if (!list_empty(&fh->capture)) { |
| 141 | vb = list_entry(fh->capture.next, struct videobuf_buffer, |
| 142 | queue); |
| 143 | vb->state = VIDEOBUF_ACTIVE; |
| 144 | } |
| 145 | |
| 146 | spin_unlock(&fh->queue_lock); |
| 147 | } |
| 148 | |
| 149 | static bool timblogiw_dma_filter_fn(struct dma_chan *chan, void *filter_param) |
| 150 | { |
Hans Verkuil | 61ea3aa | 2010-12-29 14:38:44 -0300 | [diff] [blame] | 151 | return chan->chan_id == (uintptr_t)filter_param; |
Richard Röjfors | 9eae42e | 2010-11-08 10:45:44 -0300 | [diff] [blame] | 152 | } |
| 153 | |
| 154 | /* IOCTL functions */ |
| 155 | |
| 156 | static int timblogiw_g_fmt(struct file *file, void *priv, |
| 157 | struct v4l2_format *format) |
| 158 | { |
| 159 | struct video_device *vdev = video_devdata(file); |
| 160 | struct timblogiw *lw = video_get_drvdata(vdev); |
| 161 | struct timblogiw_fh *fh = priv; |
| 162 | |
| 163 | dev_dbg(&vdev->dev, "%s entry\n", __func__); |
| 164 | |
| 165 | if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 166 | return -EINVAL; |
| 167 | |
| 168 | mutex_lock(&lw->lock); |
| 169 | |
| 170 | format->fmt.pix.width = fh->cur_norm->width; |
| 171 | format->fmt.pix.height = fh->cur_norm->height; |
| 172 | format->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; |
| 173 | format->fmt.pix.bytesperline = timblogiw_bytes_per_line(fh->cur_norm); |
| 174 | format->fmt.pix.sizeimage = timblogiw_frame_size(fh->cur_norm); |
| 175 | format->fmt.pix.field = V4L2_FIELD_NONE; |
| 176 | |
| 177 | mutex_unlock(&lw->lock); |
| 178 | |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | static int timblogiw_try_fmt(struct file *file, void *priv, |
| 183 | struct v4l2_format *format) |
| 184 | { |
| 185 | struct video_device *vdev = video_devdata(file); |
| 186 | struct v4l2_pix_format *pix = &format->fmt.pix; |
| 187 | |
| 188 | dev_dbg(&vdev->dev, |
| 189 | "%s - width=%d, height=%d, pixelformat=%d, field=%d\n" |
| 190 | "bytes per line %d, size image: %d, colorspace: %d\n", |
| 191 | __func__, |
| 192 | pix->width, pix->height, pix->pixelformat, pix->field, |
| 193 | pix->bytesperline, pix->sizeimage, pix->colorspace); |
| 194 | |
| 195 | if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 196 | return -EINVAL; |
| 197 | |
| 198 | if (pix->field != V4L2_FIELD_NONE) |
| 199 | return -EINVAL; |
| 200 | |
| 201 | if (pix->pixelformat != V4L2_PIX_FMT_UYVY) |
| 202 | return -EINVAL; |
| 203 | |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | static int timblogiw_s_fmt(struct file *file, void *priv, |
| 208 | struct v4l2_format *format) |
| 209 | { |
| 210 | struct video_device *vdev = video_devdata(file); |
| 211 | struct timblogiw *lw = video_get_drvdata(vdev); |
| 212 | struct timblogiw_fh *fh = priv; |
| 213 | struct v4l2_pix_format *pix = &format->fmt.pix; |
| 214 | int err; |
| 215 | |
| 216 | mutex_lock(&lw->lock); |
| 217 | |
| 218 | err = timblogiw_try_fmt(file, priv, format); |
| 219 | if (err) |
| 220 | goto out; |
| 221 | |
| 222 | if (videobuf_queue_is_busy(&fh->vb_vidq)) { |
| 223 | dev_err(&vdev->dev, "%s queue busy\n", __func__); |
| 224 | err = -EBUSY; |
| 225 | goto out; |
| 226 | } |
| 227 | |
| 228 | pix->width = fh->cur_norm->width; |
| 229 | pix->height = fh->cur_norm->height; |
| 230 | |
| 231 | out: |
| 232 | mutex_unlock(&lw->lock); |
| 233 | return err; |
| 234 | } |
| 235 | |
| 236 | static int timblogiw_querycap(struct file *file, void *priv, |
| 237 | struct v4l2_capability *cap) |
| 238 | { |
| 239 | struct video_device *vdev = video_devdata(file); |
| 240 | |
| 241 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); |
| 242 | memset(cap, 0, sizeof(*cap)); |
| 243 | strncpy(cap->card, TIMBLOGIWIN_NAME, sizeof(cap->card)-1); |
Dan Carpenter | dcd745b | 2010-12-20 09:53:16 -0300 | [diff] [blame] | 244 | strncpy(cap->driver, DRIVER_NAME, sizeof(cap->driver) - 1); |
Richard Röjfors | 9eae42e | 2010-11-08 10:45:44 -0300 | [diff] [blame] | 245 | strlcpy(cap->bus_info, vdev->name, sizeof(cap->bus_info)); |
| 246 | cap->version = TIMBLOGIW_VERSION_CODE; |
| 247 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | |
| 248 | V4L2_CAP_READWRITE; |
| 249 | |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | static int timblogiw_enum_fmt(struct file *file, void *priv, |
| 254 | struct v4l2_fmtdesc *fmt) |
| 255 | { |
| 256 | struct video_device *vdev = video_devdata(file); |
| 257 | |
| 258 | dev_dbg(&vdev->dev, "%s, index: %d\n", __func__, fmt->index); |
| 259 | |
| 260 | if (fmt->index != 0) |
| 261 | return -EINVAL; |
| 262 | memset(fmt, 0, sizeof(*fmt)); |
| 263 | fmt->index = 0; |
| 264 | fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 265 | strncpy(fmt->description, "4:2:2, packed, YUYV", |
| 266 | sizeof(fmt->description)-1); |
| 267 | fmt->pixelformat = V4L2_PIX_FMT_UYVY; |
| 268 | |
| 269 | return 0; |
| 270 | } |
| 271 | |
| 272 | static int timblogiw_g_parm(struct file *file, void *priv, |
| 273 | struct v4l2_streamparm *sp) |
| 274 | { |
| 275 | struct timblogiw_fh *fh = priv; |
| 276 | struct v4l2_captureparm *cp = &sp->parm.capture; |
| 277 | |
| 278 | cp->capability = V4L2_CAP_TIMEPERFRAME; |
| 279 | cp->timeperframe.numerator = 1; |
| 280 | cp->timeperframe.denominator = fh->cur_norm->fps; |
| 281 | |
| 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | static int timblogiw_reqbufs(struct file *file, void *priv, |
| 286 | struct v4l2_requestbuffers *rb) |
| 287 | { |
| 288 | struct video_device *vdev = video_devdata(file); |
| 289 | struct timblogiw_fh *fh = priv; |
| 290 | |
| 291 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); |
| 292 | |
| 293 | return videobuf_reqbufs(&fh->vb_vidq, rb); |
| 294 | } |
| 295 | |
| 296 | static int timblogiw_querybuf(struct file *file, void *priv, |
| 297 | struct v4l2_buffer *b) |
| 298 | { |
| 299 | struct video_device *vdev = video_devdata(file); |
| 300 | struct timblogiw_fh *fh = priv; |
| 301 | |
| 302 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); |
| 303 | |
| 304 | return videobuf_querybuf(&fh->vb_vidq, b); |
| 305 | } |
| 306 | |
| 307 | static int timblogiw_qbuf(struct file *file, void *priv, struct v4l2_buffer *b) |
| 308 | { |
| 309 | struct video_device *vdev = video_devdata(file); |
| 310 | struct timblogiw_fh *fh = priv; |
| 311 | |
| 312 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); |
| 313 | |
| 314 | return videobuf_qbuf(&fh->vb_vidq, b); |
| 315 | } |
| 316 | |
| 317 | static int timblogiw_dqbuf(struct file *file, void *priv, |
| 318 | struct v4l2_buffer *b) |
| 319 | { |
| 320 | struct video_device *vdev = video_devdata(file); |
| 321 | struct timblogiw_fh *fh = priv; |
| 322 | |
| 323 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); |
| 324 | |
| 325 | return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & O_NONBLOCK); |
| 326 | } |
| 327 | |
| 328 | static int timblogiw_g_std(struct file *file, void *priv, v4l2_std_id *std) |
| 329 | { |
| 330 | struct video_device *vdev = video_devdata(file); |
| 331 | struct timblogiw_fh *fh = priv; |
| 332 | |
| 333 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); |
| 334 | |
| 335 | *std = fh->cur_norm->std; |
| 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | static int timblogiw_s_std(struct file *file, void *priv, v4l2_std_id *std) |
| 340 | { |
| 341 | struct video_device *vdev = video_devdata(file); |
| 342 | struct timblogiw *lw = video_get_drvdata(vdev); |
| 343 | struct timblogiw_fh *fh = priv; |
| 344 | int err = 0; |
| 345 | |
| 346 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); |
| 347 | |
| 348 | mutex_lock(&lw->lock); |
| 349 | |
| 350 | if (TIMBLOGIW_HAS_DECODER(lw)) |
| 351 | err = v4l2_subdev_call(lw->sd_enc, core, s_std, *std); |
| 352 | |
| 353 | if (!err) |
| 354 | fh->cur_norm = timblogiw_get_norm(*std); |
| 355 | |
| 356 | mutex_unlock(&lw->lock); |
| 357 | |
| 358 | return err; |
| 359 | } |
| 360 | |
| 361 | static int timblogiw_enuminput(struct file *file, void *priv, |
| 362 | struct v4l2_input *inp) |
| 363 | { |
| 364 | struct video_device *vdev = video_devdata(file); |
| 365 | int i; |
| 366 | |
| 367 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); |
| 368 | |
| 369 | if (inp->index != 0) |
| 370 | return -EINVAL; |
| 371 | |
Richard Röjfors | 9eae42e | 2010-11-08 10:45:44 -0300 | [diff] [blame] | 372 | inp->index = 0; |
| 373 | |
| 374 | strncpy(inp->name, "Timb input 1", sizeof(inp->name) - 1); |
| 375 | inp->type = V4L2_INPUT_TYPE_CAMERA; |
| 376 | |
| 377 | inp->std = 0; |
| 378 | for (i = 0; i < ARRAY_SIZE(timblogiw_tvnorms); i++) |
| 379 | inp->std |= timblogiw_tvnorms[i].std; |
| 380 | |
| 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | static int timblogiw_g_input(struct file *file, void *priv, |
| 385 | unsigned int *input) |
| 386 | { |
| 387 | struct video_device *vdev = video_devdata(file); |
| 388 | |
| 389 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); |
| 390 | |
| 391 | *input = 0; |
| 392 | |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | static int timblogiw_s_input(struct file *file, void *priv, unsigned int input) |
| 397 | { |
| 398 | struct video_device *vdev = video_devdata(file); |
| 399 | |
| 400 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); |
| 401 | |
| 402 | if (input != 0) |
| 403 | return -EINVAL; |
| 404 | return 0; |
| 405 | } |
| 406 | |
| 407 | static int timblogiw_streamon(struct file *file, void *priv, unsigned int type) |
| 408 | { |
| 409 | struct video_device *vdev = video_devdata(file); |
| 410 | struct timblogiw_fh *fh = priv; |
| 411 | |
| 412 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); |
| 413 | |
| 414 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
| 415 | dev_dbg(&vdev->dev, "%s - No capture device\n", __func__); |
| 416 | return -EINVAL; |
| 417 | } |
| 418 | |
| 419 | fh->frame_count = 0; |
| 420 | return videobuf_streamon(&fh->vb_vidq); |
| 421 | } |
| 422 | |
| 423 | static int timblogiw_streamoff(struct file *file, void *priv, |
| 424 | unsigned int type) |
| 425 | { |
| 426 | struct video_device *vdev = video_devdata(file); |
| 427 | struct timblogiw_fh *fh = priv; |
| 428 | |
| 429 | dev_dbg(&vdev->dev, "%s entry\n", __func__); |
| 430 | |
| 431 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 432 | return -EINVAL; |
| 433 | |
| 434 | return videobuf_streamoff(&fh->vb_vidq); |
| 435 | } |
| 436 | |
| 437 | static int timblogiw_querystd(struct file *file, void *priv, v4l2_std_id *std) |
| 438 | { |
| 439 | struct video_device *vdev = video_devdata(file); |
| 440 | struct timblogiw *lw = video_get_drvdata(vdev); |
| 441 | struct timblogiw_fh *fh = priv; |
| 442 | |
| 443 | dev_dbg(&vdev->dev, "%s entry\n", __func__); |
| 444 | |
| 445 | if (TIMBLOGIW_HAS_DECODER(lw)) |
| 446 | return v4l2_subdev_call(lw->sd_enc, video, querystd, std); |
| 447 | else { |
| 448 | *std = fh->cur_norm->std; |
| 449 | return 0; |
| 450 | } |
| 451 | } |
| 452 | |
| 453 | static int timblogiw_enum_framesizes(struct file *file, void *priv, |
| 454 | struct v4l2_frmsizeenum *fsize) |
| 455 | { |
| 456 | struct video_device *vdev = video_devdata(file); |
| 457 | struct timblogiw_fh *fh = priv; |
| 458 | |
| 459 | dev_dbg(&vdev->dev, "%s - index: %d, format: %d\n", __func__, |
| 460 | fsize->index, fsize->pixel_format); |
| 461 | |
| 462 | if ((fsize->index != 0) || |
| 463 | (fsize->pixel_format != V4L2_PIX_FMT_UYVY)) |
| 464 | return -EINVAL; |
| 465 | |
| 466 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; |
| 467 | fsize->discrete.width = fh->cur_norm->width; |
| 468 | fsize->discrete.height = fh->cur_norm->height; |
| 469 | |
| 470 | return 0; |
| 471 | } |
| 472 | |
| 473 | /* Video buffer functions */ |
| 474 | |
| 475 | static int buffer_setup(struct videobuf_queue *vq, unsigned int *count, |
| 476 | unsigned int *size) |
| 477 | { |
| 478 | struct timblogiw_fh *fh = vq->priv_data; |
| 479 | |
| 480 | *size = timblogiw_frame_size(fh->cur_norm); |
| 481 | |
| 482 | if (!*count) |
| 483 | *count = 32; |
| 484 | |
| 485 | while (*size * *count > TIMBLOGIW_MAX_VIDEO_MEM * 1024 * 1024) |
| 486 | (*count)--; |
| 487 | |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, |
| 492 | enum v4l2_field field) |
| 493 | { |
| 494 | struct timblogiw_fh *fh = vq->priv_data; |
| 495 | struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer, |
| 496 | vb); |
| 497 | unsigned int data_size = timblogiw_frame_size(fh->cur_norm); |
| 498 | int err = 0; |
| 499 | |
| 500 | if (vb->baddr && vb->bsize < data_size) |
| 501 | /* User provided buffer, but it is too small */ |
| 502 | return -ENOMEM; |
| 503 | |
| 504 | vb->size = data_size; |
| 505 | vb->width = fh->cur_norm->width; |
| 506 | vb->height = fh->cur_norm->height; |
| 507 | vb->field = field; |
| 508 | |
| 509 | if (vb->state == VIDEOBUF_NEEDS_INIT) { |
| 510 | int i; |
| 511 | unsigned int size; |
| 512 | unsigned int bytes_per_desc = TIMBLOGIW_LINES_PER_DESC * |
| 513 | timblogiw_bytes_per_line(fh->cur_norm); |
| 514 | dma_addr_t addr; |
| 515 | |
| 516 | sg_init_table(buf->sg, ARRAY_SIZE(buf->sg)); |
| 517 | |
| 518 | err = videobuf_iolock(vq, vb, NULL); |
| 519 | if (err) |
| 520 | goto err; |
| 521 | |
| 522 | addr = videobuf_to_dma_contig(vb); |
| 523 | for (i = 0, size = 0; size < data_size; i++) { |
| 524 | sg_dma_address(buf->sg + i) = addr + size; |
| 525 | size += bytes_per_desc; |
| 526 | sg_dma_len(buf->sg + i) = (size > data_size) ? |
| 527 | (bytes_per_desc - (size - data_size)) : |
| 528 | bytes_per_desc; |
| 529 | } |
| 530 | |
| 531 | vb->state = VIDEOBUF_PREPARED; |
| 532 | buf->cookie = -1; |
| 533 | buf->fh = fh; |
| 534 | } |
| 535 | |
| 536 | return 0; |
| 537 | |
| 538 | err: |
| 539 | videobuf_dma_contig_free(vq, vb); |
| 540 | vb->state = VIDEOBUF_NEEDS_INIT; |
| 541 | return err; |
| 542 | } |
| 543 | |
| 544 | static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) |
| 545 | { |
| 546 | struct timblogiw_fh *fh = vq->priv_data; |
| 547 | struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer, |
| 548 | vb); |
| 549 | struct dma_async_tx_descriptor *desc; |
| 550 | int sg_elems; |
| 551 | int bytes_per_desc = TIMBLOGIW_LINES_PER_DESC * |
| 552 | timblogiw_bytes_per_line(fh->cur_norm); |
| 553 | |
| 554 | sg_elems = timblogiw_frame_size(fh->cur_norm) / bytes_per_desc; |
| 555 | sg_elems += |
| 556 | (timblogiw_frame_size(fh->cur_norm) % bytes_per_desc) ? 1 : 0; |
| 557 | |
| 558 | if (list_empty(&fh->capture)) |
| 559 | vb->state = VIDEOBUF_ACTIVE; |
| 560 | else |
| 561 | vb->state = VIDEOBUF_QUEUED; |
| 562 | |
| 563 | list_add_tail(&vb->queue, &fh->capture); |
| 564 | |
| 565 | spin_unlock_irq(&fh->queue_lock); |
| 566 | |
| 567 | desc = fh->chan->device->device_prep_slave_sg(fh->chan, |
| 568 | buf->sg, sg_elems, DMA_FROM_DEVICE, |
| 569 | DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP); |
| 570 | if (!desc) { |
| 571 | spin_lock_irq(&fh->queue_lock); |
| 572 | list_del_init(&vb->queue); |
| 573 | vb->state = VIDEOBUF_PREPARED; |
| 574 | return; |
| 575 | } |
| 576 | |
| 577 | desc->callback_param = buf; |
| 578 | desc->callback = timblogiw_dma_cb; |
| 579 | |
| 580 | buf->cookie = desc->tx_submit(desc); |
| 581 | |
| 582 | spin_lock_irq(&fh->queue_lock); |
| 583 | } |
| 584 | |
| 585 | static void buffer_release(struct videobuf_queue *vq, |
| 586 | struct videobuf_buffer *vb) |
| 587 | { |
| 588 | struct timblogiw_fh *fh = vq->priv_data; |
| 589 | struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer, |
| 590 | vb); |
| 591 | |
| 592 | videobuf_waiton(vq, vb, 0, 0); |
| 593 | if (buf->cookie >= 0) |
| 594 | dma_sync_wait(fh->chan, buf->cookie); |
| 595 | |
| 596 | videobuf_dma_contig_free(vq, vb); |
| 597 | vb->state = VIDEOBUF_NEEDS_INIT; |
| 598 | } |
| 599 | |
| 600 | static struct videobuf_queue_ops timblogiw_video_qops = { |
| 601 | .buf_setup = buffer_setup, |
| 602 | .buf_prepare = buffer_prepare, |
| 603 | .buf_queue = buffer_queue, |
| 604 | .buf_release = buffer_release, |
| 605 | }; |
| 606 | |
| 607 | /* Device Operations functions */ |
| 608 | |
| 609 | static int timblogiw_open(struct file *file) |
| 610 | { |
| 611 | struct video_device *vdev = video_devdata(file); |
| 612 | struct timblogiw *lw = video_get_drvdata(vdev); |
| 613 | struct timblogiw_fh *fh; |
| 614 | v4l2_std_id std; |
| 615 | dma_cap_mask_t mask; |
| 616 | int err = 0; |
| 617 | |
| 618 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); |
| 619 | |
| 620 | mutex_lock(&lw->lock); |
| 621 | if (lw->opened) { |
| 622 | err = -EBUSY; |
| 623 | goto out; |
| 624 | } |
| 625 | |
| 626 | if (TIMBLOGIW_HAS_DECODER(lw) && !lw->sd_enc) { |
| 627 | struct i2c_adapter *adapt; |
| 628 | |
| 629 | /* find the video decoder */ |
| 630 | adapt = i2c_get_adapter(lw->pdata.i2c_adapter); |
| 631 | if (!adapt) { |
| 632 | dev_err(&vdev->dev, "No I2C bus #%d\n", |
| 633 | lw->pdata.i2c_adapter); |
| 634 | err = -ENODEV; |
| 635 | goto out; |
| 636 | } |
| 637 | |
| 638 | /* now find the encoder */ |
| 639 | lw->sd_enc = v4l2_i2c_new_subdev_board(&lw->v4l2_dev, adapt, |
| 640 | lw->pdata.encoder.info, NULL); |
| 641 | |
| 642 | i2c_put_adapter(adapt); |
| 643 | |
| 644 | if (!lw->sd_enc) { |
| 645 | dev_err(&vdev->dev, "Failed to get encoder: %s\n", |
| 646 | lw->pdata.encoder.module_name); |
| 647 | err = -ENODEV; |
| 648 | goto out; |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | fh = kzalloc(sizeof(*fh), GFP_KERNEL); |
| 653 | if (!fh) { |
| 654 | err = -ENOMEM; |
| 655 | goto out; |
| 656 | } |
| 657 | |
| 658 | fh->cur_norm = timblogiw_tvnorms; |
| 659 | timblogiw_querystd(file, fh, &std); |
| 660 | fh->cur_norm = timblogiw_get_norm(std); |
| 661 | |
| 662 | INIT_LIST_HEAD(&fh->capture); |
| 663 | spin_lock_init(&fh->queue_lock); |
| 664 | |
| 665 | dma_cap_zero(mask); |
| 666 | dma_cap_set(DMA_SLAVE, mask); |
| 667 | dma_cap_set(DMA_PRIVATE, mask); |
| 668 | |
| 669 | /* find the DMA channel */ |
| 670 | fh->chan = dma_request_channel(mask, timblogiw_dma_filter_fn, |
Hans Verkuil | 61ea3aa | 2010-12-29 14:38:44 -0300 | [diff] [blame] | 671 | (void *)(uintptr_t)lw->pdata.dma_channel); |
Richard Röjfors | 9eae42e | 2010-11-08 10:45:44 -0300 | [diff] [blame] | 672 | if (!fh->chan) { |
| 673 | dev_err(&vdev->dev, "Failed to get DMA channel\n"); |
| 674 | kfree(fh); |
| 675 | err = -ENODEV; |
| 676 | goto out; |
| 677 | } |
| 678 | |
| 679 | file->private_data = fh; |
| 680 | videobuf_queue_dma_contig_init(&fh->vb_vidq, |
| 681 | &timblogiw_video_qops, lw->dev, &fh->queue_lock, |
| 682 | V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, |
| 683 | sizeof(struct timblogiw_buffer), fh, NULL); |
| 684 | |
| 685 | lw->opened = true; |
| 686 | out: |
| 687 | mutex_unlock(&lw->lock); |
| 688 | |
| 689 | return err; |
| 690 | } |
| 691 | |
| 692 | static int timblogiw_close(struct file *file) |
| 693 | { |
| 694 | struct video_device *vdev = video_devdata(file); |
| 695 | struct timblogiw *lw = video_get_drvdata(vdev); |
| 696 | struct timblogiw_fh *fh = file->private_data; |
| 697 | |
| 698 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); |
| 699 | |
| 700 | videobuf_stop(&fh->vb_vidq); |
| 701 | videobuf_mmap_free(&fh->vb_vidq); |
| 702 | |
| 703 | dma_release_channel(fh->chan); |
| 704 | |
| 705 | kfree(fh); |
| 706 | |
| 707 | mutex_lock(&lw->lock); |
| 708 | lw->opened = false; |
| 709 | mutex_unlock(&lw->lock); |
| 710 | return 0; |
| 711 | } |
| 712 | |
| 713 | static ssize_t timblogiw_read(struct file *file, char __user *data, |
| 714 | size_t count, loff_t *ppos) |
| 715 | { |
| 716 | struct video_device *vdev = video_devdata(file); |
| 717 | struct timblogiw_fh *fh = file->private_data; |
| 718 | |
| 719 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); |
| 720 | |
| 721 | return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0, |
| 722 | file->f_flags & O_NONBLOCK); |
| 723 | } |
| 724 | |
| 725 | static unsigned int timblogiw_poll(struct file *file, |
| 726 | struct poll_table_struct *wait) |
| 727 | { |
| 728 | struct video_device *vdev = video_devdata(file); |
| 729 | struct timblogiw_fh *fh = file->private_data; |
| 730 | |
| 731 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); |
| 732 | |
| 733 | return videobuf_poll_stream(file, &fh->vb_vidq, wait); |
| 734 | } |
| 735 | |
| 736 | static int timblogiw_mmap(struct file *file, struct vm_area_struct *vma) |
| 737 | { |
| 738 | struct video_device *vdev = video_devdata(file); |
| 739 | struct timblogiw_fh *fh = file->private_data; |
| 740 | |
| 741 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); |
| 742 | |
| 743 | return videobuf_mmap_mapper(&fh->vb_vidq, vma); |
| 744 | } |
| 745 | |
| 746 | /* Platform device functions */ |
| 747 | |
Stephen Rothwell | 49aefd2 | 2010-11-22 23:35:17 -0300 | [diff] [blame] | 748 | static __devinitconst struct v4l2_ioctl_ops timblogiw_ioctl_ops = { |
Richard Röjfors | 9eae42e | 2010-11-08 10:45:44 -0300 | [diff] [blame] | 749 | .vidioc_querycap = timblogiw_querycap, |
| 750 | .vidioc_enum_fmt_vid_cap = timblogiw_enum_fmt, |
| 751 | .vidioc_g_fmt_vid_cap = timblogiw_g_fmt, |
| 752 | .vidioc_try_fmt_vid_cap = timblogiw_try_fmt, |
| 753 | .vidioc_s_fmt_vid_cap = timblogiw_s_fmt, |
| 754 | .vidioc_g_parm = timblogiw_g_parm, |
| 755 | .vidioc_reqbufs = timblogiw_reqbufs, |
| 756 | .vidioc_querybuf = timblogiw_querybuf, |
| 757 | .vidioc_qbuf = timblogiw_qbuf, |
| 758 | .vidioc_dqbuf = timblogiw_dqbuf, |
| 759 | .vidioc_g_std = timblogiw_g_std, |
| 760 | .vidioc_s_std = timblogiw_s_std, |
| 761 | .vidioc_enum_input = timblogiw_enuminput, |
| 762 | .vidioc_g_input = timblogiw_g_input, |
| 763 | .vidioc_s_input = timblogiw_s_input, |
| 764 | .vidioc_streamon = timblogiw_streamon, |
| 765 | .vidioc_streamoff = timblogiw_streamoff, |
| 766 | .vidioc_querystd = timblogiw_querystd, |
| 767 | .vidioc_enum_framesizes = timblogiw_enum_framesizes, |
| 768 | }; |
| 769 | |
Stephen Rothwell | 49aefd2 | 2010-11-22 23:35:17 -0300 | [diff] [blame] | 770 | static __devinitconst struct v4l2_file_operations timblogiw_fops = { |
Richard Röjfors | 9eae42e | 2010-11-08 10:45:44 -0300 | [diff] [blame] | 771 | .owner = THIS_MODULE, |
| 772 | .open = timblogiw_open, |
| 773 | .release = timblogiw_close, |
| 774 | .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */ |
| 775 | .mmap = timblogiw_mmap, |
| 776 | .read = timblogiw_read, |
| 777 | .poll = timblogiw_poll, |
| 778 | }; |
| 779 | |
Stephen Rothwell | 49aefd2 | 2010-11-22 23:35:17 -0300 | [diff] [blame] | 780 | static __devinitconst struct video_device timblogiw_template = { |
Richard Röjfors | 9eae42e | 2010-11-08 10:45:44 -0300 | [diff] [blame] | 781 | .name = TIMBLOGIWIN_NAME, |
| 782 | .fops = &timblogiw_fops, |
| 783 | .ioctl_ops = &timblogiw_ioctl_ops, |
| 784 | .release = video_device_release_empty, |
| 785 | .minor = -1, |
| 786 | .tvnorms = V4L2_STD_PAL | V4L2_STD_NTSC |
| 787 | }; |
| 788 | |
| 789 | static int __devinit timblogiw_probe(struct platform_device *pdev) |
| 790 | { |
| 791 | int err; |
| 792 | struct timblogiw *lw = NULL; |
Samuel Ortiz | 3271d38 | 2011-04-08 01:23:57 +0200 | [diff] [blame] | 793 | struct timb_video_platform_data *pdata = pdev->dev.platform_data; |
Richard Röjfors | 9eae42e | 2010-11-08 10:45:44 -0300 | [diff] [blame] | 794 | |
| 795 | if (!pdata) { |
| 796 | dev_err(&pdev->dev, "No platform data\n"); |
| 797 | err = -EINVAL; |
| 798 | goto err; |
| 799 | } |
| 800 | |
| 801 | if (!pdata->encoder.module_name) |
| 802 | dev_info(&pdev->dev, "Running without decoder\n"); |
| 803 | |
| 804 | lw = kzalloc(sizeof(*lw), GFP_KERNEL); |
| 805 | if (!lw) { |
| 806 | err = -ENOMEM; |
| 807 | goto err; |
| 808 | } |
| 809 | |
| 810 | if (pdev->dev.parent) |
| 811 | lw->dev = pdev->dev.parent; |
| 812 | else |
| 813 | lw->dev = &pdev->dev; |
| 814 | |
| 815 | memcpy(&lw->pdata, pdata, sizeof(lw->pdata)); |
| 816 | |
| 817 | mutex_init(&lw->lock); |
| 818 | |
| 819 | lw->video_dev = timblogiw_template; |
| 820 | |
| 821 | strlcpy(lw->v4l2_dev.name, DRIVER_NAME, sizeof(lw->v4l2_dev.name)); |
| 822 | err = v4l2_device_register(NULL, &lw->v4l2_dev); |
| 823 | if (err) |
| 824 | goto err_register; |
| 825 | |
| 826 | lw->video_dev.v4l2_dev = &lw->v4l2_dev; |
| 827 | |
| 828 | platform_set_drvdata(pdev, lw); |
| 829 | video_set_drvdata(&lw->video_dev, lw); |
| 830 | |
| 831 | err = video_register_device(&lw->video_dev, VFL_TYPE_GRABBER, 0); |
| 832 | if (err) { |
| 833 | dev_err(&pdev->dev, "Error reg video: %d\n", err); |
| 834 | goto err_request; |
| 835 | } |
| 836 | |
| 837 | |
| 838 | return 0; |
| 839 | |
| 840 | err_request: |
| 841 | platform_set_drvdata(pdev, NULL); |
| 842 | v4l2_device_unregister(&lw->v4l2_dev); |
| 843 | err_register: |
| 844 | kfree(lw); |
| 845 | err: |
| 846 | dev_err(&pdev->dev, "Failed to register: %d\n", err); |
| 847 | |
| 848 | return err; |
| 849 | } |
| 850 | |
| 851 | static int __devexit timblogiw_remove(struct platform_device *pdev) |
| 852 | { |
| 853 | struct timblogiw *lw = platform_get_drvdata(pdev); |
| 854 | |
| 855 | video_unregister_device(&lw->video_dev); |
| 856 | |
| 857 | v4l2_device_unregister(&lw->v4l2_dev); |
| 858 | |
| 859 | kfree(lw); |
| 860 | |
| 861 | platform_set_drvdata(pdev, NULL); |
| 862 | |
| 863 | return 0; |
| 864 | } |
| 865 | |
| 866 | static struct platform_driver timblogiw_platform_driver = { |
| 867 | .driver = { |
| 868 | .name = DRIVER_NAME, |
| 869 | .owner = THIS_MODULE, |
| 870 | }, |
| 871 | .probe = timblogiw_probe, |
| 872 | .remove = __devexit_p(timblogiw_remove), |
| 873 | }; |
| 874 | |
| 875 | /* Module functions */ |
| 876 | |
| 877 | static int __init timblogiw_init(void) |
| 878 | { |
| 879 | return platform_driver_register(&timblogiw_platform_driver); |
| 880 | } |
| 881 | |
| 882 | static void __exit timblogiw_exit(void) |
| 883 | { |
| 884 | platform_driver_unregister(&timblogiw_platform_driver); |
| 885 | } |
| 886 | |
| 887 | module_init(timblogiw_init); |
| 888 | module_exit(timblogiw_exit); |
| 889 | |
| 890 | MODULE_DESCRIPTION(TIMBLOGIWIN_NAME); |
| 891 | MODULE_AUTHOR("Pelagicore AB <info@pelagicore.com>"); |
| 892 | MODULE_LICENSE("GPL v2"); |
| 893 | MODULE_ALIAS("platform:"DRIVER_NAME); |