1 // SPDX-License-Identifier: GPL-2.0-only 2 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 3 4 #include <media/drv-intf/saa7146_vv.h> 5 #include <linux/module.h> 6 7 /****************************************************************************/ 8 /* resource management functions, shamelessly stolen from saa7134 driver */ 9 10 int saa7146_res_get(struct saa7146_dev *dev, unsigned int bit) 11 { 12 struct saa7146_vv *vv = dev->vv_data; 13 14 if (vv->resources & bit) { 15 DEB_D("already allocated! want: 0x%02x, cur:0x%02x\n", 16 bit, vv->resources); 17 /* have it already allocated */ 18 return 1; 19 } 20 21 /* is it free? */ 22 if (vv->resources & bit) { 23 DEB_D("locked! vv->resources:0x%02x, we want:0x%02x\n", 24 vv->resources, bit); 25 /* no, someone else uses it */ 26 return 0; 27 } 28 /* it's free, grab it */ 29 vv->resources |= bit; 30 DEB_D("res: get 0x%02x, cur:0x%02x\n", bit, vv->resources); 31 return 1; 32 } 33 34 void saa7146_res_free(struct saa7146_dev *dev, unsigned int bits) 35 { 36 struct saa7146_vv *vv = dev->vv_data; 37 38 WARN_ON((vv->resources & bits) != bits); 39 40 vv->resources &= ~bits; 41 DEB_D("res: put 0x%02x, cur:0x%02x\n", bits, vv->resources); 42 } 43 44 45 /********************************************************************************/ 46 /* common buffer functions */ 47 48 int saa7146_buffer_queue(struct saa7146_dev *dev, 49 struct saa7146_dmaqueue *q, 50 struct saa7146_buf *buf) 51 { 52 assert_spin_locked(&dev->slock); 53 DEB_EE("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf); 54 55 if (WARN_ON(!q)) 56 return -EIO; 57 58 if (NULL == q->curr) { 59 q->curr = buf; 60 DEB_D("immediately activating buffer %p\n", buf); 61 buf->activate(dev,buf,NULL); 62 } else { 63 list_add_tail(&buf->list, &q->queue); 64 DEB_D("adding buffer %p to queue. (active buffer present)\n", 65 buf); 66 } 67 return 0; 68 } 69 70 void saa7146_buffer_finish(struct saa7146_dev *dev, 71 struct saa7146_dmaqueue *q, 72 int state) 73 { 74 struct saa7146_vv *vv = dev->vv_data; 75 struct saa7146_buf *buf = q->curr; 76 77 assert_spin_locked(&dev->slock); 78 DEB_EE("dev:%p, dmaq:%p, state:%d\n", dev, q, state); 79 DEB_EE("q->curr:%p\n", q->curr); 80 81 /* finish current buffer */ 82 if (!buf) { 83 DEB_D("aiii. no current buffer\n"); 84 return; 85 } 86 87 q->curr = NULL; 88 buf->vb.vb2_buf.timestamp = ktime_get_ns(); 89 if (vv->video_fmt.field == V4L2_FIELD_ALTERNATE) 90 buf->vb.field = vv->last_field; 91 else if (vv->video_fmt.field == V4L2_FIELD_ANY) 92 buf->vb.field = (vv->video_fmt.height > vv->standard->v_max_out / 2) 93 ? V4L2_FIELD_INTERLACED 94 : V4L2_FIELD_BOTTOM; 95 else 96 buf->vb.field = vv->video_fmt.field; 97 buf->vb.sequence = vv->seqnr++; 98 vb2_buffer_done(&buf->vb.vb2_buf, state); 99 } 100 101 void saa7146_buffer_next(struct saa7146_dev *dev, 102 struct saa7146_dmaqueue *q, int vbi) 103 { 104 struct saa7146_buf *buf,*next = NULL; 105 106 if (WARN_ON(!q)) 107 return; 108 109 DEB_INT("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi); 110 111 assert_spin_locked(&dev->slock); 112 if (!list_empty(&q->queue)) { 113 /* activate next one from queue */ 114 buf = list_entry(q->queue.next, struct saa7146_buf, list); 115 list_del(&buf->list); 116 if (!list_empty(&q->queue)) 117 next = list_entry(q->queue.next, struct saa7146_buf, list); 118 q->curr = buf; 119 DEB_INT("next buffer: buf:%p, prev:%p, next:%p\n", 120 buf, q->queue.prev, q->queue.next); 121 buf->activate(dev,buf,next); 122 } else { 123 DEB_INT("no next buffer. stopping.\n"); 124 if( 0 != vbi ) { 125 /* turn off video-dma3 */ 126 saa7146_write(dev,MC1, MASK_20); 127 } else { 128 /* nothing to do -- just prevent next video-dma1 transfer 129 by lowering the protection address */ 130 131 // fixme: fix this for vflip != 0 132 133 saa7146_write(dev, PROT_ADDR1, 0); 134 saa7146_write(dev, MC2, (MASK_02|MASK_18)); 135 136 /* write the address of the rps-program */ 137 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle); 138 /* turn on rps */ 139 saa7146_write(dev, MC1, (MASK_12 | MASK_28)); 140 141 /* 142 printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1)); 143 printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1)); 144 printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1)); 145 printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1)); 146 printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1)); 147 printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1)); 148 */ 149 } 150 del_timer(&q->timeout); 151 } 152 } 153 154 void saa7146_buffer_timeout(struct timer_list *t) 155 { 156 struct saa7146_dmaqueue *q = from_timer(q, t, timeout); 157 struct saa7146_dev *dev = q->dev; 158 unsigned long flags; 159 160 DEB_EE("dev:%p, dmaq:%p\n", dev, q); 161 162 spin_lock_irqsave(&dev->slock,flags); 163 if (q->curr) { 164 DEB_D("timeout on %p\n", q->curr); 165 saa7146_buffer_finish(dev, q, VB2_BUF_STATE_ERROR); 166 } 167 168 /* we don't restart the transfer here like other drivers do. when 169 a streaming capture is disabled, the timeout function will be 170 called for the current buffer. if we activate the next buffer now, 171 we mess up our capture logic. if a timeout occurs on another buffer, 172 then something is seriously broken before, so no need to buffer the 173 next capture IMHO... */ 174 175 saa7146_buffer_next(dev, q, 0); 176 177 spin_unlock_irqrestore(&dev->slock,flags); 178 } 179 180 /********************************************************************************/ 181 /* file operations */ 182 183 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos) 184 { 185 struct video_device *vdev = video_devdata(file); 186 struct saa7146_dev *dev = video_drvdata(file); 187 int ret; 188 189 if (vdev->vfl_type != VFL_TYPE_VBI || !dev->ext_vv_data->vbi_fops.write) 190 return -EINVAL; 191 if (mutex_lock_interruptible(vdev->lock)) 192 return -ERESTARTSYS; 193 ret = dev->ext_vv_data->vbi_fops.write(file, data, count, ppos); 194 mutex_unlock(vdev->lock); 195 return ret; 196 } 197 198 static const struct v4l2_file_operations video_fops = 199 { 200 .owner = THIS_MODULE, 201 .open = v4l2_fh_open, 202 .release = vb2_fop_release, 203 .read = vb2_fop_read, 204 .write = fops_write, 205 .poll = vb2_fop_poll, 206 .mmap = vb2_fop_mmap, 207 .unlocked_ioctl = video_ioctl2, 208 }; 209 210 static void vv_callback(struct saa7146_dev *dev, unsigned long status) 211 { 212 u32 isr = status; 213 214 DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status); 215 216 if (0 != (isr & (MASK_27))) { 217 DEB_INT("irq: RPS0 (0x%08x)\n", isr); 218 saa7146_video_uops.irq_done(dev,isr); 219 } 220 221 if (0 != (isr & (MASK_28))) { 222 u32 mc2 = saa7146_read(dev, MC2); 223 if( 0 != (mc2 & MASK_15)) { 224 DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr); 225 wake_up(&dev->vv_data->vbi_wq); 226 saa7146_write(dev,MC2, MASK_31); 227 return; 228 } 229 DEB_INT("irq: RPS1 (0x%08x)\n", isr); 230 saa7146_vbi_uops.irq_done(dev,isr); 231 } 232 } 233 234 static const struct v4l2_ctrl_ops saa7146_ctrl_ops = { 235 .s_ctrl = saa7146_s_ctrl, 236 }; 237 238 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv) 239 { 240 struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler; 241 struct v4l2_pix_format *fmt; 242 struct v4l2_vbi_format *vbi; 243 struct saa7146_vv *vv; 244 int err; 245 246 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev); 247 if (err) 248 return err; 249 250 v4l2_ctrl_handler_init(hdl, 6); 251 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 252 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); 253 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 254 V4L2_CID_CONTRAST, 0, 127, 1, 64); 255 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 256 V4L2_CID_SATURATION, 0, 127, 1, 64); 257 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 258 V4L2_CID_VFLIP, 0, 1, 1, 0); 259 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 260 V4L2_CID_HFLIP, 0, 1, 1, 0); 261 if (hdl->error) { 262 err = hdl->error; 263 v4l2_ctrl_handler_free(hdl); 264 v4l2_device_unregister(&dev->v4l2_dev); 265 return err; 266 } 267 dev->v4l2_dev.ctrl_handler = hdl; 268 269 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL); 270 if (vv == NULL) { 271 ERR("out of memory. aborting.\n"); 272 v4l2_ctrl_handler_free(hdl); 273 v4l2_device_unregister(&dev->v4l2_dev); 274 return -ENOMEM; 275 } 276 ext_vv->vid_ops = saa7146_video_ioctl_ops; 277 ext_vv->vbi_ops = saa7146_vbi_ioctl_ops; 278 ext_vv->core_ops = &saa7146_video_ioctl_ops; 279 280 DEB_EE("dev:%p\n", dev); 281 282 /* set default values for video parts of the saa7146 */ 283 saa7146_write(dev, BCS_CTRL, 0x80400040); 284 285 /* enable video-port pins */ 286 saa7146_write(dev, MC1, (MASK_10 | MASK_26)); 287 288 /* save per-device extension data (one extension can 289 handle different devices that might need different 290 configuration data) */ 291 dev->ext_vv_data = ext_vv; 292 293 saa7146_video_uops.init(dev,vv); 294 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) 295 saa7146_vbi_uops.init(dev,vv); 296 297 fmt = &vv->video_fmt; 298 fmt->width = 384; 299 fmt->height = 288; 300 fmt->pixelformat = V4L2_PIX_FMT_BGR24; 301 fmt->field = V4L2_FIELD_INTERLACED; 302 fmt->colorspace = V4L2_COLORSPACE_SMPTE170M; 303 fmt->bytesperline = 3 * fmt->width; 304 fmt->sizeimage = fmt->bytesperline * fmt->height; 305 306 vbi = &vv->vbi_fmt; 307 vbi->sampling_rate = 27000000; 308 vbi->offset = 248; /* todo */ 309 vbi->samples_per_line = 720 * 2; 310 vbi->sample_format = V4L2_PIX_FMT_GREY; 311 312 /* fixme: this only works for PAL */ 313 vbi->start[0] = 5; 314 vbi->count[0] = 16; 315 vbi->start[1] = 312; 316 vbi->count[1] = 16; 317 318 timer_setup(&vv->vbi_read_timeout, NULL, 0); 319 320 dev->vv_data = vv; 321 dev->vv_callback = &vv_callback; 322 323 return 0; 324 } 325 EXPORT_SYMBOL_GPL(saa7146_vv_init); 326 327 int saa7146_vv_release(struct saa7146_dev* dev) 328 { 329 struct saa7146_vv *vv = dev->vv_data; 330 331 DEB_EE("dev:%p\n", dev); 332 333 v4l2_device_unregister(&dev->v4l2_dev); 334 v4l2_ctrl_handler_free(&dev->ctrl_handler); 335 kfree(vv); 336 dev->vv_data = NULL; 337 dev->vv_callback = NULL; 338 339 return 0; 340 } 341 EXPORT_SYMBOL_GPL(saa7146_vv_release); 342 343 int saa7146_register_device(struct video_device *vfd, struct saa7146_dev *dev, 344 char *name, int type) 345 { 346 struct vb2_queue *q; 347 int err; 348 int i; 349 350 DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type); 351 352 vfd->fops = &video_fops; 353 if (type == VFL_TYPE_VIDEO) { 354 vfd->ioctl_ops = &dev->ext_vv_data->vid_ops; 355 q = &dev->vv_data->video_dmaq.q; 356 } else { 357 vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops; 358 q = &dev->vv_data->vbi_dmaq.q; 359 } 360 vfd->release = video_device_release_empty; 361 vfd->lock = &dev->v4l2_lock; 362 vfd->v4l2_dev = &dev->v4l2_dev; 363 vfd->tvnorms = 0; 364 for (i = 0; i < dev->ext_vv_data->num_stds; i++) 365 vfd->tvnorms |= dev->ext_vv_data->stds[i].id; 366 strscpy(vfd->name, name, sizeof(vfd->name)); 367 vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | 368 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; 369 vfd->device_caps |= dev->ext_vv_data->capabilities; 370 if (type == VFL_TYPE_VIDEO) { 371 vfd->device_caps &= 372 ~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT); 373 } else if (vfd->device_caps & V4L2_CAP_SLICED_VBI_OUTPUT) { 374 vfd->vfl_dir = VFL_DIR_TX; 375 vfd->device_caps &= ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | 376 V4L2_CAP_AUDIO | V4L2_CAP_TUNER); 377 } else { 378 vfd->device_caps &= ~V4L2_CAP_VIDEO_CAPTURE; 379 } 380 381 q->type = type == VFL_TYPE_VIDEO ? V4L2_BUF_TYPE_VIDEO_CAPTURE : V4L2_BUF_TYPE_VBI_CAPTURE; 382 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 383 q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF; 384 q->ops = type == VFL_TYPE_VIDEO ? &video_qops : &vbi_qops; 385 q->mem_ops = &vb2_dma_sg_memops; 386 q->drv_priv = dev; 387 q->gfp_flags = __GFP_DMA32; 388 q->buf_struct_size = sizeof(struct saa7146_buf); 389 q->lock = &dev->v4l2_lock; 390 q->min_buffers_needed = 2; 391 q->dev = &dev->pci->dev; 392 err = vb2_queue_init(q); 393 if (err) 394 return err; 395 vfd->queue = q; 396 397 video_set_drvdata(vfd, dev); 398 399 err = video_register_device(vfd, type, -1); 400 if (err < 0) { 401 ERR("cannot register v4l2 device. skipping.\n"); 402 return err; 403 } 404 405 pr_info("%s: registered device %s [v4l2]\n", 406 dev->name, video_device_node_name(vfd)); 407 return 0; 408 } 409 EXPORT_SYMBOL_GPL(saa7146_register_device); 410 411 int saa7146_unregister_device(struct video_device *vfd, struct saa7146_dev *dev) 412 { 413 DEB_EE("dev:%p\n", dev); 414 415 video_unregister_device(vfd); 416 return 0; 417 } 418 EXPORT_SYMBOL_GPL(saa7146_unregister_device); 419 420 static int __init saa7146_vv_init_module(void) 421 { 422 return 0; 423 } 424 425 426 static void __exit saa7146_vv_cleanup_module(void) 427 { 428 } 429 430 module_init(saa7146_vv_init_module); 431 module_exit(saa7146_vv_cleanup_module); 432 433 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); 434 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware"); 435 MODULE_LICENSE("GPL"); 436