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 <linux/init.h> 21 #include <linux/list.h> 22 #include <linux/module.h> 23 #include <linux/kernel.h> 24 #include <linux/delay.h> 25 26 #include <media/v4l2-common.h> 27 #include <media/v4l2-event.h> 28 29 #include "saa7134-reg.h" 30 #include "saa7134.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 static unsigned int debug; 43 module_param(debug, int, 0644); 44 MODULE_PARM_DESC(debug,"enable debug messages"); 45 46 #define dprintk(fmt, arg...) if (debug) \ 47 printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg) 48 49 /* ------------------------------------------------------------------ */ 50 51 static int start_streaming(struct vb2_queue *vq, unsigned int count) 52 { 53 struct saa7134_dmaqueue *dmaq = vq->drv_priv; 54 struct saa7134_dev *dev = dmaq->dev; 55 u32 leading_null_bytes = 0; 56 int err; 57 58 err = saa7134_ts_start_streaming(vq, count); 59 if (err) 60 return err; 61 62 /* If more cards start to need this, then this 63 should probably be added to the card definitions. */ 64 switch (dev->board) { 65 case SAA7134_BOARD_BEHOLD_M6: 66 case SAA7134_BOARD_BEHOLD_M63: 67 case SAA7134_BOARD_BEHOLD_M6_EXTRA: 68 leading_null_bytes = 1; 69 break; 70 } 71 saa_call_all(dev, core, init, leading_null_bytes); 72 /* Unmute audio */ 73 saa_writeb(SAA7134_AUDIO_MUTE_CTRL, 74 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6)); 75 dev->empress_started = 1; 76 return 0; 77 } 78 79 static void stop_streaming(struct vb2_queue *vq) 80 { 81 struct saa7134_dmaqueue *dmaq = vq->drv_priv; 82 struct saa7134_dev *dev = dmaq->dev; 83 84 saa7134_ts_stop_streaming(vq); 85 saa_writeb(SAA7134_SPECIAL_MODE, 0x00); 86 msleep(20); 87 saa_writeb(SAA7134_SPECIAL_MODE, 0x01); 88 msleep(100); 89 /* Mute audio */ 90 saa_writeb(SAA7134_AUDIO_MUTE_CTRL, 91 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6)); 92 dev->empress_started = 0; 93 } 94 95 static struct vb2_ops saa7134_empress_qops = { 96 .queue_setup = saa7134_ts_queue_setup, 97 .buf_init = saa7134_ts_buffer_init, 98 .buf_prepare = saa7134_ts_buffer_prepare, 99 .buf_finish = saa7134_ts_buffer_finish, 100 .buf_queue = saa7134_vb2_buffer_queue, 101 .wait_prepare = vb2_ops_wait_prepare, 102 .wait_finish = vb2_ops_wait_finish, 103 .start_streaming = start_streaming, 104 .stop_streaming = stop_streaming, 105 }; 106 107 /* ------------------------------------------------------------------ */ 108 109 static int empress_enum_fmt_vid_cap(struct file *file, void *priv, 110 struct v4l2_fmtdesc *f) 111 { 112 if (f->index != 0) 113 return -EINVAL; 114 115 strlcpy(f->description, "MPEG TS", sizeof(f->description)); 116 f->pixelformat = V4L2_PIX_FMT_MPEG; 117 f->flags = V4L2_FMT_FLAG_COMPRESSED; 118 return 0; 119 } 120 121 static int empress_g_fmt_vid_cap(struct file *file, void *priv, 122 struct v4l2_format *f) 123 { 124 struct saa7134_dev *dev = video_drvdata(file); 125 struct v4l2_mbus_framefmt mbus_fmt; 126 127 saa_call_all(dev, video, g_mbus_fmt, &mbus_fmt); 128 129 v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt); 130 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; 131 f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets; 132 f->fmt.pix.bytesperline = 0; 133 f->fmt.pix.priv = 0; 134 135 return 0; 136 } 137 138 static int empress_s_fmt_vid_cap(struct file *file, void *priv, 139 struct v4l2_format *f) 140 { 141 struct saa7134_dev *dev = video_drvdata(file); 142 struct v4l2_mbus_framefmt mbus_fmt; 143 144 v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED); 145 saa_call_all(dev, video, s_mbus_fmt, &mbus_fmt); 146 v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt); 147 148 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; 149 f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets; 150 f->fmt.pix.bytesperline = 0; 151 f->fmt.pix.priv = 0; 152 153 return 0; 154 } 155 156 static int empress_try_fmt_vid_cap(struct file *file, void *priv, 157 struct v4l2_format *f) 158 { 159 struct saa7134_dev *dev = video_drvdata(file); 160 struct v4l2_mbus_framefmt mbus_fmt; 161 162 v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED); 163 saa_call_all(dev, video, try_mbus_fmt, &mbus_fmt); 164 v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt); 165 166 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; 167 f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets; 168 f->fmt.pix.bytesperline = 0; 169 f->fmt.pix.priv = 0; 170 171 return 0; 172 } 173 174 static const struct v4l2_file_operations ts_fops = 175 { 176 .owner = THIS_MODULE, 177 .open = v4l2_fh_open, 178 .release = vb2_fop_release, 179 .read = vb2_fop_read, 180 .poll = vb2_fop_poll, 181 .mmap = vb2_fop_mmap, 182 .ioctl = video_ioctl2, 183 }; 184 185 static const struct v4l2_ioctl_ops ts_ioctl_ops = { 186 .vidioc_querycap = saa7134_querycap, 187 .vidioc_enum_fmt_vid_cap = empress_enum_fmt_vid_cap, 188 .vidioc_try_fmt_vid_cap = empress_try_fmt_vid_cap, 189 .vidioc_s_fmt_vid_cap = empress_s_fmt_vid_cap, 190 .vidioc_g_fmt_vid_cap = empress_g_fmt_vid_cap, 191 .vidioc_reqbufs = vb2_ioctl_reqbufs, 192 .vidioc_querybuf = vb2_ioctl_querybuf, 193 .vidioc_qbuf = vb2_ioctl_qbuf, 194 .vidioc_dqbuf = vb2_ioctl_dqbuf, 195 .vidioc_streamon = vb2_ioctl_streamon, 196 .vidioc_streamoff = vb2_ioctl_streamoff, 197 .vidioc_g_frequency = saa7134_g_frequency, 198 .vidioc_s_frequency = saa7134_s_frequency, 199 .vidioc_g_tuner = saa7134_g_tuner, 200 .vidioc_s_tuner = saa7134_s_tuner, 201 .vidioc_enum_input = saa7134_enum_input, 202 .vidioc_g_input = saa7134_g_input, 203 .vidioc_s_input = saa7134_s_input, 204 .vidioc_s_std = saa7134_s_std, 205 .vidioc_g_std = saa7134_g_std, 206 .vidioc_querystd = saa7134_querystd, 207 .vidioc_log_status = v4l2_ctrl_log_status, 208 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 209 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 210 }; 211 212 /* ----------------------------------------------------------- */ 213 214 static struct video_device saa7134_empress_template = { 215 .name = "saa7134-empress", 216 .fops = &ts_fops, 217 .ioctl_ops = &ts_ioctl_ops, 218 219 .tvnorms = SAA7134_NORMS, 220 }; 221 222 static void empress_signal_update(struct work_struct *work) 223 { 224 struct saa7134_dev* dev = 225 container_of(work, struct saa7134_dev, empress_workqueue); 226 227 if (dev->nosignal) { 228 dprintk("no video signal\n"); 229 } else { 230 dprintk("video signal acquired\n"); 231 } 232 } 233 234 static void empress_signal_change(struct saa7134_dev *dev) 235 { 236 schedule_work(&dev->empress_workqueue); 237 } 238 239 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl) 240 { 241 switch (ctrl->id) { 242 case V4L2_CID_BRIGHTNESS: 243 case V4L2_CID_HUE: 244 case V4L2_CID_CONTRAST: 245 case V4L2_CID_SATURATION: 246 case V4L2_CID_AUDIO_MUTE: 247 case V4L2_CID_AUDIO_VOLUME: 248 case V4L2_CID_PRIVATE_INVERT: 249 case V4L2_CID_PRIVATE_AUTOMUTE: 250 return true; 251 default: 252 return false; 253 } 254 } 255 256 static int empress_init(struct saa7134_dev *dev) 257 { 258 struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler; 259 struct vb2_queue *q; 260 int err; 261 262 dprintk("%s: %s\n",dev->name,__func__); 263 dev->empress_dev = video_device_alloc(); 264 if (NULL == dev->empress_dev) 265 return -ENOMEM; 266 *(dev->empress_dev) = saa7134_empress_template; 267 dev->empress_dev->v4l2_dev = &dev->v4l2_dev; 268 dev->empress_dev->release = video_device_release; 269 dev->empress_dev->lock = &dev->lock; 270 snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name), 271 "%s empress (%s)", dev->name, 272 saa7134_boards[dev->board].name); 273 set_bit(V4L2_FL_USE_FH_PRIO, &dev->empress_dev->flags); 274 v4l2_ctrl_handler_init(hdl, 21); 275 v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter); 276 if (dev->empress_sd) 277 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL); 278 if (hdl->error) { 279 video_device_release(dev->empress_dev); 280 return hdl->error; 281 } 282 dev->empress_dev->ctrl_handler = hdl; 283 284 INIT_WORK(&dev->empress_workqueue, empress_signal_update); 285 286 q = &dev->empress_vbq; 287 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 288 /* 289 * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle 290 * transfers that do not start at the beginning of a page. A USERPTR 291 * can start anywhere in a page, so USERPTR support is a no-go. 292 */ 293 q->io_modes = VB2_MMAP | VB2_READ; 294 q->drv_priv = &dev->ts_q; 295 q->ops = &saa7134_empress_qops; 296 q->gfp_flags = GFP_DMA32; 297 q->mem_ops = &vb2_dma_sg_memops; 298 q->buf_struct_size = sizeof(struct saa7134_buf); 299 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 300 q->lock = &dev->lock; 301 err = vb2_queue_init(q); 302 if (err) 303 return err; 304 dev->empress_dev->queue = q; 305 306 video_set_drvdata(dev->empress_dev, dev); 307 err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER, 308 empress_nr[dev->nr]); 309 if (err < 0) { 310 printk(KERN_INFO "%s: can't register video device\n", 311 dev->name); 312 video_device_release(dev->empress_dev); 313 dev->empress_dev = NULL; 314 return err; 315 } 316 printk(KERN_INFO "%s: registered device %s [mpeg]\n", 317 dev->name, video_device_node_name(dev->empress_dev)); 318 319 empress_signal_update(&dev->empress_workqueue); 320 return 0; 321 } 322 323 static int empress_fini(struct saa7134_dev *dev) 324 { 325 dprintk("%s: %s\n",dev->name,__func__); 326 327 if (NULL == dev->empress_dev) 328 return 0; 329 flush_work(&dev->empress_workqueue); 330 video_unregister_device(dev->empress_dev); 331 vb2_queue_release(&dev->empress_vbq); 332 v4l2_ctrl_handler_free(&dev->empress_ctrl_handler); 333 dev->empress_dev = NULL; 334 return 0; 335 } 336 337 static struct saa7134_mpeg_ops empress_ops = { 338 .type = SAA7134_MPEG_EMPRESS, 339 .init = empress_init, 340 .fini = empress_fini, 341 .signal_change = empress_signal_change, 342 }; 343 344 static int __init empress_register(void) 345 { 346 return saa7134_ts_register(&empress_ops); 347 } 348 349 static void __exit empress_unregister(void) 350 { 351 saa7134_ts_unregister(&empress_ops); 352 } 353 354 module_init(empress_register); 355 module_exit(empress_unregister); 356