1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * 4 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs] 5 */ 6 7 #include "saa7134.h" 8 #include "saa7134-reg.h" 9 10 #include <linux/init.h> 11 #include <linux/list.h> 12 #include <linux/module.h> 13 #include <linux/kernel.h> 14 #include <linux/delay.h> 15 16 #include <media/v4l2-common.h> 17 #include <media/v4l2-event.h> 18 19 /* ------------------------------------------------------------------ */ 20 21 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]"); 22 MODULE_DESCRIPTION("Philips SAA7134 empress support"); 23 MODULE_LICENSE("GPL"); 24 25 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET }; 26 27 module_param_array(empress_nr, int, NULL, 0444); 28 MODULE_PARM_DESC(empress_nr,"ts device number"); 29 30 /* ------------------------------------------------------------------ */ 31 32 static int start_streaming(struct vb2_queue *vq, unsigned int count) 33 { 34 struct saa7134_dmaqueue *dmaq = vq->drv_priv; 35 struct saa7134_dev *dev = dmaq->dev; 36 u32 leading_null_bytes = 0; 37 int err; 38 39 err = saa7134_ts_start_streaming(vq, count); 40 if (err) 41 return err; 42 43 /* If more cards start to need this, then this 44 should probably be added to the card definitions. */ 45 switch (dev->board) { 46 case SAA7134_BOARD_BEHOLD_M6: 47 case SAA7134_BOARD_BEHOLD_M63: 48 case SAA7134_BOARD_BEHOLD_M6_EXTRA: 49 leading_null_bytes = 1; 50 break; 51 } 52 saa_call_all(dev, core, init, leading_null_bytes); 53 /* Unmute audio */ 54 saa_writeb(SAA7134_AUDIO_MUTE_CTRL, 55 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6)); 56 dev->empress_started = 1; 57 return 0; 58 } 59 60 static void stop_streaming(struct vb2_queue *vq) 61 { 62 struct saa7134_dmaqueue *dmaq = vq->drv_priv; 63 struct saa7134_dev *dev = dmaq->dev; 64 65 saa7134_ts_stop_streaming(vq); 66 saa_writeb(SAA7134_SPECIAL_MODE, 0x00); 67 msleep(20); 68 saa_writeb(SAA7134_SPECIAL_MODE, 0x01); 69 msleep(100); 70 /* Mute audio */ 71 saa_writeb(SAA7134_AUDIO_MUTE_CTRL, 72 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6)); 73 dev->empress_started = 0; 74 } 75 76 static const struct vb2_ops saa7134_empress_qops = { 77 .queue_setup = saa7134_ts_queue_setup, 78 .buf_init = saa7134_ts_buffer_init, 79 .buf_prepare = saa7134_ts_buffer_prepare, 80 .buf_queue = saa7134_vb2_buffer_queue, 81 .wait_prepare = vb2_ops_wait_prepare, 82 .wait_finish = vb2_ops_wait_finish, 83 .start_streaming = start_streaming, 84 .stop_streaming = stop_streaming, 85 }; 86 87 /* ------------------------------------------------------------------ */ 88 89 static int empress_enum_fmt_vid_cap(struct file *file, void *priv, 90 struct v4l2_fmtdesc *f) 91 { 92 if (f->index != 0) 93 return -EINVAL; 94 95 f->pixelformat = V4L2_PIX_FMT_MPEG; 96 return 0; 97 } 98 99 static int empress_g_fmt_vid_cap(struct file *file, void *priv, 100 struct v4l2_format *f) 101 { 102 struct saa7134_dev *dev = video_drvdata(file); 103 struct v4l2_subdev_format fmt = { 104 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 105 }; 106 struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format; 107 108 saa_call_all(dev, pad, get_fmt, NULL, &fmt); 109 110 v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt); 111 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; 112 f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets; 113 f->fmt.pix.bytesperline = 0; 114 115 return 0; 116 } 117 118 static int empress_s_fmt_vid_cap(struct file *file, void *priv, 119 struct v4l2_format *f) 120 { 121 struct saa7134_dev *dev = video_drvdata(file); 122 struct v4l2_subdev_format format = { 123 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 124 }; 125 126 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED); 127 saa_call_all(dev, pad, set_fmt, NULL, &format); 128 v4l2_fill_pix_format(&f->fmt.pix, &format.format); 129 130 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; 133 134 return 0; 135 } 136 137 static int empress_try_fmt_vid_cap(struct file *file, void *priv, 138 struct v4l2_format *f) 139 { 140 struct saa7134_dev *dev = video_drvdata(file); 141 struct v4l2_subdev_pad_config pad_cfg; 142 struct v4l2_subdev_state pad_state = { 143 .pads = &pad_cfg, 144 }; 145 struct v4l2_subdev_format format = { 146 .which = V4L2_SUBDEV_FORMAT_TRY, 147 }; 148 149 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED); 150 saa_call_all(dev, pad, set_fmt, &pad_state, &format); 151 v4l2_fill_pix_format(&f->fmt.pix, &format.format); 152 153 f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; 154 f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets; 155 f->fmt.pix.bytesperline = 0; 156 157 return 0; 158 } 159 160 static const struct v4l2_file_operations ts_fops = 161 { 162 .owner = THIS_MODULE, 163 .open = v4l2_fh_open, 164 .release = vb2_fop_release, 165 .read = vb2_fop_read, 166 .poll = vb2_fop_poll, 167 .mmap = vb2_fop_mmap, 168 .unlocked_ioctl = video_ioctl2, 169 }; 170 171 static const struct v4l2_ioctl_ops ts_ioctl_ops = { 172 .vidioc_querycap = saa7134_querycap, 173 .vidioc_enum_fmt_vid_cap = empress_enum_fmt_vid_cap, 174 .vidioc_try_fmt_vid_cap = empress_try_fmt_vid_cap, 175 .vidioc_s_fmt_vid_cap = empress_s_fmt_vid_cap, 176 .vidioc_g_fmt_vid_cap = empress_g_fmt_vid_cap, 177 .vidioc_reqbufs = vb2_ioctl_reqbufs, 178 .vidioc_querybuf = vb2_ioctl_querybuf, 179 .vidioc_qbuf = vb2_ioctl_qbuf, 180 .vidioc_dqbuf = vb2_ioctl_dqbuf, 181 .vidioc_expbuf = vb2_ioctl_expbuf, 182 .vidioc_streamon = vb2_ioctl_streamon, 183 .vidioc_streamoff = vb2_ioctl_streamoff, 184 .vidioc_g_frequency = saa7134_g_frequency, 185 .vidioc_s_frequency = saa7134_s_frequency, 186 .vidioc_g_tuner = saa7134_g_tuner, 187 .vidioc_s_tuner = saa7134_s_tuner, 188 .vidioc_enum_input = saa7134_enum_input, 189 .vidioc_g_input = saa7134_g_input, 190 .vidioc_s_input = saa7134_s_input, 191 .vidioc_s_std = saa7134_s_std, 192 .vidioc_g_std = saa7134_g_std, 193 .vidioc_querystd = saa7134_querystd, 194 .vidioc_log_status = v4l2_ctrl_log_status, 195 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 196 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 197 }; 198 199 /* ----------------------------------------------------------- */ 200 201 static const struct video_device saa7134_empress_template = { 202 .name = "saa7134-empress", 203 .fops = &ts_fops, 204 .ioctl_ops = &ts_ioctl_ops, 205 206 .tvnorms = SAA7134_NORMS, 207 }; 208 209 static void empress_signal_update(struct work_struct *work) 210 { 211 struct saa7134_dev* dev = 212 container_of(work, struct saa7134_dev, empress_workqueue); 213 214 if (dev->nosignal) { 215 pr_debug("no video signal\n"); 216 } else { 217 pr_debug("video signal acquired\n"); 218 } 219 } 220 221 static void empress_signal_change(struct saa7134_dev *dev) 222 { 223 schedule_work(&dev->empress_workqueue); 224 } 225 226 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl) 227 { 228 switch (ctrl->id) { 229 case V4L2_CID_BRIGHTNESS: 230 case V4L2_CID_HUE: 231 case V4L2_CID_CONTRAST: 232 case V4L2_CID_SATURATION: 233 case V4L2_CID_AUDIO_MUTE: 234 case V4L2_CID_AUDIO_VOLUME: 235 case V4L2_CID_PRIVATE_INVERT: 236 case V4L2_CID_PRIVATE_AUTOMUTE: 237 return true; 238 default: 239 return false; 240 } 241 } 242 243 static int empress_init(struct saa7134_dev *dev) 244 { 245 struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler; 246 struct vb2_queue *q; 247 int err; 248 249 pr_debug("%s: %s\n", dev->name, __func__); 250 dev->empress_dev = video_device_alloc(); 251 if (NULL == dev->empress_dev) 252 return -ENOMEM; 253 *(dev->empress_dev) = saa7134_empress_template; 254 dev->empress_dev->v4l2_dev = &dev->v4l2_dev; 255 dev->empress_dev->release = video_device_release; 256 dev->empress_dev->lock = &dev->lock; 257 snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name), 258 "%s empress (%s)", dev->name, 259 saa7134_boards[dev->board].name); 260 v4l2_ctrl_handler_init(hdl, 21); 261 v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter, false); 262 if (dev->empress_sd) 263 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL, true); 264 if (hdl->error) { 265 video_device_release(dev->empress_dev); 266 return hdl->error; 267 } 268 dev->empress_dev->ctrl_handler = hdl; 269 270 INIT_WORK(&dev->empress_workqueue, empress_signal_update); 271 272 q = &dev->empress_vbq; 273 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 274 /* 275 * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle 276 * transfers that do not start at the beginning of a page. A USERPTR 277 * can start anywhere in a page, so USERPTR support is a no-go. 278 */ 279 q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ; 280 q->drv_priv = &dev->ts_q; 281 q->ops = &saa7134_empress_qops; 282 q->gfp_flags = GFP_DMA32; 283 q->mem_ops = &vb2_dma_sg_memops; 284 q->buf_struct_size = sizeof(struct saa7134_buf); 285 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 286 q->lock = &dev->lock; 287 q->dev = &dev->pci->dev; 288 err = vb2_queue_init(q); 289 if (err) { 290 video_device_release(dev->empress_dev); 291 dev->empress_dev = NULL; 292 return err; 293 } 294 dev->empress_dev->queue = q; 295 dev->empress_dev->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING | 296 V4L2_CAP_VIDEO_CAPTURE; 297 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type != UNSET) 298 dev->empress_dev->device_caps |= V4L2_CAP_TUNER; 299 300 video_set_drvdata(dev->empress_dev, dev); 301 err = video_register_device(dev->empress_dev,VFL_TYPE_VIDEO, 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 vb2_video_unregister_device(dev->empress_dev); 325 v4l2_ctrl_handler_free(&dev->empress_ctrl_handler); 326 dev->empress_dev = NULL; 327 return 0; 328 } 329 330 static struct saa7134_mpeg_ops empress_ops = { 331 .type = SAA7134_MPEG_EMPRESS, 332 .init = empress_init, 333 .fini = empress_fini, 334 .signal_change = empress_signal_change, 335 }; 336 337 static int __init empress_register(void) 338 { 339 return saa7134_ts_register(&empress_ops); 340 } 341 342 static void __exit empress_unregister(void) 343 { 344 saa7134_ts_unregister(&empress_ops); 345 } 346 347 module_init(empress_register); 348 module_exit(empress_unregister); 349