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