1 /* 2 * 3 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs] 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 as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 */ 19 20 #include "saa7134.h" 21 #include "saa7134-reg.h" 22 23 #include <linux/init.h> 24 #include <linux/list.h> 25 #include <linux/module.h> 26 #include <linux/kernel.h> 27 #include <linux/delay.h> 28 29 #include <media/v4l2-common.h> 30 #include <media/v4l2-event.h> 31 32 /* ------------------------------------------------------------------ */ 33 34 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]"); 35 MODULE_LICENSE("GPL"); 36 37 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET }; 38 39 module_param_array(empress_nr, int, NULL, 0444); 40 MODULE_PARM_DESC(empress_nr,"ts device number"); 41 42 /* ------------------------------------------------------------------ */ 43 44 static int start_streaming(struct vb2_queue *vq, unsigned int count) 45 { 46 struct saa7134_dmaqueue *dmaq = vq->drv_priv; 47 struct saa7134_dev *dev = dmaq->dev; 48 u32 leading_null_bytes = 0; 49 int err; 50 51 err = saa7134_ts_start_streaming(vq, count); 52 if (err) 53 return err; 54 55 /* If more cards start to need this, then this 56 should probably be added to the card definitions. */ 57 switch (dev->board) { 58 case SAA7134_BOARD_BEHOLD_M6: 59 case SAA7134_BOARD_BEHOLD_M63: 60 case SAA7134_BOARD_BEHOLD_M6_EXTRA: 61 leading_null_bytes = 1; 62 break; 63 } 64 saa_call_all(dev, core, init, leading_null_bytes); 65 /* Unmute audio */ 66 saa_writeb(SAA7134_AUDIO_MUTE_CTRL, 67 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6)); 68 dev->empress_started = 1; 69 return 0; 70 } 71 72 static void stop_streaming(struct vb2_queue *vq) 73 { 74 struct saa7134_dmaqueue *dmaq = vq->drv_priv; 75 struct saa7134_dev *dev = dmaq->dev; 76 77 saa7134_ts_stop_streaming(vq); 78 saa_writeb(SAA7134_SPECIAL_MODE, 0x00); 79 msleep(20); 80 saa_writeb(SAA7134_SPECIAL_MODE, 0x01); 81 msleep(100); 82 /* Mute audio */ 83 saa_writeb(SAA7134_AUDIO_MUTE_CTRL, 84 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6)); 85 dev->empress_started = 0; 86 } 87 88 static const struct vb2_ops saa7134_empress_qops = { 89 .queue_setup = saa7134_ts_queue_setup, 90 .buf_init = saa7134_ts_buffer_init, 91 .buf_prepare = saa7134_ts_buffer_prepare, 92 .buf_queue = saa7134_vb2_buffer_queue, 93 .wait_prepare = vb2_ops_wait_prepare, 94 .wait_finish = vb2_ops_wait_finish, 95 .start_streaming = start_streaming, 96 .stop_streaming = stop_streaming, 97 }; 98 99 /* ------------------------------------------------------------------ */ 100 101 static int empress_enum_fmt_vid_cap(struct file *file, void *priv, 102 struct v4l2_fmtdesc *f) 103 { 104 if (f->index != 0) 105 return -EINVAL; 106 107 strlcpy(f->description, "MPEG TS", sizeof(f->description)); 108 f->pixelformat = V4L2_PIX_FMT_MPEG; 109 f->flags = V4L2_FMT_FLAG_COMPRESSED; 110 return 0; 111 } 112 113 static int empress_g_fmt_vid_cap(struct file *file, void *priv, 114 struct v4l2_format *f) 115 { 116 struct saa7134_dev *dev = video_drvdata(file); 117 struct v4l2_subdev_format fmt = { 118 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 119 }; 120 struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format; 121 122 saa_call_all(dev, pad, get_fmt, NULL, &fmt); 123 124 v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt); 125 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; 126 f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets; 127 f->fmt.pix.bytesperline = 0; 128 129 return 0; 130 } 131 132 static int empress_s_fmt_vid_cap(struct file *file, void *priv, 133 struct v4l2_format *f) 134 { 135 struct saa7134_dev *dev = video_drvdata(file); 136 struct v4l2_subdev_format format = { 137 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 138 }; 139 140 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED); 141 saa_call_all(dev, pad, set_fmt, NULL, &format); 142 v4l2_fill_pix_format(&f->fmt.pix, &format.format); 143 144 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; 145 f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets; 146 f->fmt.pix.bytesperline = 0; 147 148 return 0; 149 } 150 151 static int empress_try_fmt_vid_cap(struct file *file, void *priv, 152 struct v4l2_format *f) 153 { 154 struct saa7134_dev *dev = video_drvdata(file); 155 struct v4l2_subdev_pad_config pad_cfg; 156 struct v4l2_subdev_format format = { 157 .which = V4L2_SUBDEV_FORMAT_TRY, 158 }; 159 160 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED); 161 saa_call_all(dev, pad, set_fmt, &pad_cfg, &format); 162 v4l2_fill_pix_format(&f->fmt.pix, &format.format); 163 164 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; 165 f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets; 166 f->fmt.pix.bytesperline = 0; 167 168 return 0; 169 } 170 171 static const struct v4l2_file_operations ts_fops = 172 { 173 .owner = THIS_MODULE, 174 .open = v4l2_fh_open, 175 .release = vb2_fop_release, 176 .read = vb2_fop_read, 177 .poll = vb2_fop_poll, 178 .mmap = vb2_fop_mmap, 179 .unlocked_ioctl = video_ioctl2, 180 }; 181 182 static const struct v4l2_ioctl_ops ts_ioctl_ops = { 183 .vidioc_querycap = saa7134_querycap, 184 .vidioc_enum_fmt_vid_cap = empress_enum_fmt_vid_cap, 185 .vidioc_try_fmt_vid_cap = empress_try_fmt_vid_cap, 186 .vidioc_s_fmt_vid_cap = empress_s_fmt_vid_cap, 187 .vidioc_g_fmt_vid_cap = empress_g_fmt_vid_cap, 188 .vidioc_reqbufs = vb2_ioctl_reqbufs, 189 .vidioc_querybuf = vb2_ioctl_querybuf, 190 .vidioc_qbuf = vb2_ioctl_qbuf, 191 .vidioc_dqbuf = vb2_ioctl_dqbuf, 192 .vidioc_expbuf = vb2_ioctl_expbuf, 193 .vidioc_streamon = vb2_ioctl_streamon, 194 .vidioc_streamoff = vb2_ioctl_streamoff, 195 .vidioc_g_frequency = saa7134_g_frequency, 196 .vidioc_s_frequency = saa7134_s_frequency, 197 .vidioc_g_tuner = saa7134_g_tuner, 198 .vidioc_s_tuner = saa7134_s_tuner, 199 .vidioc_enum_input = saa7134_enum_input, 200 .vidioc_g_input = saa7134_g_input, 201 .vidioc_s_input = saa7134_s_input, 202 .vidioc_s_std = saa7134_s_std, 203 .vidioc_g_std = saa7134_g_std, 204 .vidioc_querystd = saa7134_querystd, 205 .vidioc_log_status = v4l2_ctrl_log_status, 206 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 207 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 208 }; 209 210 /* ----------------------------------------------------------- */ 211 212 static struct video_device saa7134_empress_template = { 213 .name = "saa7134-empress", 214 .fops = &ts_fops, 215 .ioctl_ops = &ts_ioctl_ops, 216 217 .tvnorms = SAA7134_NORMS, 218 }; 219 220 static void empress_signal_update(struct work_struct *work) 221 { 222 struct saa7134_dev* dev = 223 container_of(work, struct saa7134_dev, empress_workqueue); 224 225 if (dev->nosignal) { 226 pr_debug("no video signal\n"); 227 } else { 228 pr_debug("video signal acquired\n"); 229 } 230 } 231 232 static void empress_signal_change(struct saa7134_dev *dev) 233 { 234 schedule_work(&dev->empress_workqueue); 235 } 236 237 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl) 238 { 239 switch (ctrl->id) { 240 case V4L2_CID_BRIGHTNESS: 241 case V4L2_CID_HUE: 242 case V4L2_CID_CONTRAST: 243 case V4L2_CID_SATURATION: 244 case V4L2_CID_AUDIO_MUTE: 245 case V4L2_CID_AUDIO_VOLUME: 246 case V4L2_CID_PRIVATE_INVERT: 247 case V4L2_CID_PRIVATE_AUTOMUTE: 248 return true; 249 default: 250 return false; 251 } 252 } 253 254 static int empress_init(struct saa7134_dev *dev) 255 { 256 struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler; 257 struct vb2_queue *q; 258 int err; 259 260 pr_debug("%s: %s\n", dev->name, __func__); 261 dev->empress_dev = video_device_alloc(); 262 if (NULL == dev->empress_dev) 263 return -ENOMEM; 264 *(dev->empress_dev) = saa7134_empress_template; 265 dev->empress_dev->v4l2_dev = &dev->v4l2_dev; 266 dev->empress_dev->release = video_device_release; 267 dev->empress_dev->lock = &dev->lock; 268 snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name), 269 "%s empress (%s)", dev->name, 270 saa7134_boards[dev->board].name); 271 v4l2_ctrl_handler_init(hdl, 21); 272 v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter); 273 if (dev->empress_sd) 274 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL); 275 if (hdl->error) { 276 video_device_release(dev->empress_dev); 277 return hdl->error; 278 } 279 dev->empress_dev->ctrl_handler = hdl; 280 281 INIT_WORK(&dev->empress_workqueue, empress_signal_update); 282 283 q = &dev->empress_vbq; 284 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 285 /* 286 * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle 287 * transfers that do not start at the beginning of a page. A USERPTR 288 * can start anywhere in a page, so USERPTR support is a no-go. 289 */ 290 q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ; 291 q->drv_priv = &dev->ts_q; 292 q->ops = &saa7134_empress_qops; 293 q->gfp_flags = GFP_DMA32; 294 q->mem_ops = &vb2_dma_sg_memops; 295 q->buf_struct_size = sizeof(struct saa7134_buf); 296 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 297 q->lock = &dev->lock; 298 q->dev = &dev->pci->dev; 299 err = vb2_queue_init(q); 300 if (err) 301 return err; 302 dev->empress_dev->queue = q; 303 304 video_set_drvdata(dev->empress_dev, dev); 305 err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER, 306 empress_nr[dev->nr]); 307 if (err < 0) { 308 pr_info("%s: can't register video device\n", 309 dev->name); 310 video_device_release(dev->empress_dev); 311 dev->empress_dev = NULL; 312 return err; 313 } 314 pr_info("%s: registered device %s [mpeg]\n", 315 dev->name, video_device_node_name(dev->empress_dev)); 316 317 empress_signal_update(&dev->empress_workqueue); 318 return 0; 319 } 320 321 static int empress_fini(struct saa7134_dev *dev) 322 { 323 pr_debug("%s: %s\n", dev->name, __func__); 324 325 if (NULL == dev->empress_dev) 326 return 0; 327 flush_work(&dev->empress_workqueue); 328 video_unregister_device(dev->empress_dev); 329 vb2_queue_release(&dev->empress_vbq); 330 v4l2_ctrl_handler_free(&dev->empress_ctrl_handler); 331 dev->empress_dev = NULL; 332 return 0; 333 } 334 335 static struct saa7134_mpeg_ops empress_ops = { 336 .type = SAA7134_MPEG_EMPRESS, 337 .init = empress_init, 338 .fini = empress_fini, 339 .signal_change = empress_signal_change, 340 }; 341 342 static int __init empress_register(void) 343 { 344 return saa7134_ts_register(&empress_ops); 345 } 346 347 static void __exit empress_unregister(void) 348 { 349 saa7134_ts_unregister(&empress_ops); 350 } 351 352 module_init(empress_register); 353 module_exit(empress_unregister); 354