1 // SPDX-License-Identifier: GPL-2.0-only
2 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
4 #include <media/drv-intf/saa7146_vv.h>
5 #include <linux/module.h>
7 /****************************************************************************/
8 /* resource management functions, shamelessly stolen from saa7134 driver */
10 int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
12 struct saa7146_dev *dev = fh->dev;
13 struct saa7146_vv *vv = dev->vv_data;
15 if (fh->resources & bit) {
16 DEB_D("already allocated! want: 0x%02x, cur:0x%02x\n",
18 /* have it already allocated */
23 if (vv->resources & bit) {
24 DEB_D("locked! vv->resources:0x%02x, we want:0x%02x\n",
26 /* no, someone else uses it */
29 /* it's free, grab it */
32 DEB_D("res: get 0x%02x, cur:0x%02x\n", bit, vv->resources);
36 void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
38 struct saa7146_dev *dev = fh->dev;
39 struct saa7146_vv *vv = dev->vv_data;
41 BUG_ON((fh->resources & bits) != bits);
43 fh->resources &= ~bits;
44 vv->resources &= ~bits;
45 DEB_D("res: put 0x%02x, cur:0x%02x\n", bits, vv->resources);
49 /********************************************************************************/
50 /* common dma functions */
52 void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
53 struct saa7146_buf *buf)
55 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
56 DEB_EE("dev:%p, buf:%p\n", dev, buf);
58 videobuf_waiton(q, &buf->vb, 0, 0);
59 videobuf_dma_unmap(q->dev, dma);
60 videobuf_dma_free(dma);
61 buf->vb.state = VIDEOBUF_NEEDS_INIT;
65 /********************************************************************************/
66 /* common buffer functions */
68 int saa7146_buffer_queue(struct saa7146_dev *dev,
69 struct saa7146_dmaqueue *q,
70 struct saa7146_buf *buf)
72 assert_spin_locked(&dev->slock);
73 DEB_EE("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf);
77 if (NULL == q->curr) {
79 DEB_D("immediately activating buffer %p\n", buf);
80 buf->activate(dev,buf,NULL);
82 list_add_tail(&buf->vb.queue,&q->queue);
83 buf->vb.state = VIDEOBUF_QUEUED;
84 DEB_D("adding buffer %p to queue. (active buffer present)\n",
90 void saa7146_buffer_finish(struct saa7146_dev *dev,
91 struct saa7146_dmaqueue *q,
94 assert_spin_locked(&dev->slock);
95 DEB_EE("dev:%p, dmaq:%p, state:%d\n", dev, q, state);
96 DEB_EE("q->curr:%p\n", q->curr);
98 /* finish current buffer */
99 if (NULL == q->curr) {
100 DEB_D("aiii. no current buffer\n");
104 q->curr->vb.state = state;
105 q->curr->vb.ts = ktime_get_ns();
106 wake_up(&q->curr->vb.done);
111 void saa7146_buffer_next(struct saa7146_dev *dev,
112 struct saa7146_dmaqueue *q, int vbi)
114 struct saa7146_buf *buf,*next = NULL;
118 DEB_INT("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi);
120 assert_spin_locked(&dev->slock);
121 if (!list_empty(&q->queue)) {
122 /* activate next one from queue */
123 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
124 list_del(&buf->vb.queue);
125 if (!list_empty(&q->queue))
126 next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
128 DEB_INT("next buffer: buf:%p, prev:%p, next:%p\n",
129 buf, q->queue.prev, q->queue.next);
130 buf->activate(dev,buf,next);
132 DEB_INT("no next buffer. stopping.\n");
134 /* turn off video-dma3 */
135 saa7146_write(dev,MC1, MASK_20);
137 /* nothing to do -- just prevent next video-dma1 transfer
138 by lowering the protection address */
140 // fixme: fix this for vflip != 0
142 saa7146_write(dev, PROT_ADDR1, 0);
143 saa7146_write(dev, MC2, (MASK_02|MASK_18));
145 /* write the address of the rps-program */
146 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
148 saa7146_write(dev, MC1, (MASK_12 | MASK_28));
151 printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
152 printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
153 printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
154 printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
155 printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
156 printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
159 del_timer(&q->timeout);
163 void saa7146_buffer_timeout(struct timer_list *t)
165 struct saa7146_dmaqueue *q = from_timer(q, t, timeout);
166 struct saa7146_dev *dev = q->dev;
169 DEB_EE("dev:%p, dmaq:%p\n", dev, q);
171 spin_lock_irqsave(&dev->slock,flags);
173 DEB_D("timeout on %p\n", q->curr);
174 saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
177 /* we don't restart the transfer here like other drivers do. when
178 a streaming capture is disabled, the timeout function will be
179 called for the current buffer. if we activate the next buffer now,
180 we mess up our capture logic. if a timeout occurs on another buffer,
181 then something is seriously broken before, so no need to buffer the
182 next capture IMHO... */
184 saa7146_buffer_next(dev,q);
186 spin_unlock_irqrestore(&dev->slock,flags);
189 /********************************************************************************/
190 /* file operations */
192 static int fops_open(struct file *file)
194 struct video_device *vdev = video_devdata(file);
195 struct saa7146_dev *dev = video_drvdata(file);
196 struct saa7146_fh *fh = NULL;
199 DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev));
201 if (mutex_lock_interruptible(vdev->lock))
204 DEB_D("using: %p\n", dev);
206 /* check if an extension is registered */
207 if( NULL == dev->ext ) {
208 DEB_S("no extension registered for this device\n");
213 /* allocate per open data */
214 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
216 DEB_S("cannot allocate memory for per open data\n");
221 v4l2_fh_init(&fh->fh, vdev);
223 file->private_data = &fh->fh;
226 if (vdev->vfl_type == VFL_TYPE_VBI) {
227 DEB_S("initializing vbi...\n");
228 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
229 result = saa7146_vbi_uops.open(dev,file);
230 if (dev->ext_vv_data->vbi_fops.open)
231 dev->ext_vv_data->vbi_fops.open(file);
233 DEB_S("initializing video...\n");
234 result = saa7146_video_uops.open(dev,file);
241 if( 0 == try_module_get(dev->ext->module)) {
247 v4l2_fh_add(&fh->fh);
249 if (fh && result != 0) {
251 file->private_data = NULL;
253 mutex_unlock(vdev->lock);
257 static int fops_release(struct file *file)
259 struct video_device *vdev = video_devdata(file);
260 struct saa7146_fh *fh = file->private_data;
261 struct saa7146_dev *dev = fh->dev;
263 DEB_EE("file:%p\n", file);
265 mutex_lock(vdev->lock);
267 if (vdev->vfl_type == VFL_TYPE_VBI) {
268 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
269 saa7146_vbi_uops.release(dev,file);
270 if (dev->ext_vv_data->vbi_fops.release)
271 dev->ext_vv_data->vbi_fops.release(file);
273 saa7146_video_uops.release(dev,file);
276 v4l2_fh_del(&fh->fh);
277 v4l2_fh_exit(&fh->fh);
278 module_put(dev->ext->module);
279 file->private_data = NULL;
282 mutex_unlock(vdev->lock);
287 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
289 struct video_device *vdev = video_devdata(file);
290 struct saa7146_fh *fh = file->private_data;
291 struct videobuf_queue *q;
294 switch (vdev->vfl_type) {
295 case VFL_TYPE_VIDEO: {
296 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",
302 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",
304 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
313 if (mutex_lock_interruptible(vdev->lock))
315 res = videobuf_mmap_mapper(q, vma);
316 mutex_unlock(vdev->lock);
320 static __poll_t __fops_poll(struct file *file, struct poll_table_struct *wait)
322 struct video_device *vdev = video_devdata(file);
323 struct saa7146_fh *fh = file->private_data;
324 struct videobuf_buffer *buf = NULL;
325 struct videobuf_queue *q;
326 __poll_t res = v4l2_ctrl_poll(file, wait);
328 DEB_EE("file:%p, poll:%p\n", file, wait);
330 if (vdev->vfl_type == VFL_TYPE_VBI) {
331 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
332 return res | EPOLLOUT | EPOLLWRNORM;
333 if( 0 == fh->vbi_q.streaming )
334 return res | videobuf_poll_stream(file, &fh->vbi_q, wait);
337 DEB_D("using video queue\n");
341 if (!list_empty(&q->stream))
342 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
345 DEB_D("buf == NULL!\n");
346 return res | EPOLLERR;
349 poll_wait(file, &buf->done, wait);
350 if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
351 DEB_D("poll succeeded!\n");
352 return res | EPOLLIN | EPOLLRDNORM;
355 DEB_D("nothing to poll for, buf->state:%d\n", buf->state);
359 static __poll_t fops_poll(struct file *file, struct poll_table_struct *wait)
361 struct video_device *vdev = video_devdata(file);
364 mutex_lock(vdev->lock);
365 res = __fops_poll(file, wait);
366 mutex_unlock(vdev->lock);
370 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
372 struct video_device *vdev = video_devdata(file);
373 struct saa7146_fh *fh = file->private_data;
376 switch (vdev->vfl_type) {
379 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun",
380 file, data, (unsigned long)count);
382 return saa7146_video_uops.read(file,data,count,ppos);
385 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n",
386 file, data, (unsigned long)count);
388 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) {
389 if (mutex_lock_interruptible(vdev->lock))
391 ret = saa7146_vbi_uops.read(file, data, count, ppos);
392 mutex_unlock(vdev->lock);
401 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
403 struct video_device *vdev = video_devdata(file);
404 struct saa7146_fh *fh = file->private_data;
407 switch (vdev->vfl_type) {
411 if (fh->dev->ext_vv_data->vbi_fops.write) {
412 if (mutex_lock_interruptible(vdev->lock))
414 ret = fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
415 mutex_unlock(vdev->lock);
424 static const struct v4l2_file_operations video_fops =
426 .owner = THIS_MODULE,
428 .release = fops_release,
433 .unlocked_ioctl = video_ioctl2,
436 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
440 DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status);
442 if (0 != (isr & (MASK_27))) {
443 DEB_INT("irq: RPS0 (0x%08x)\n", isr);
444 saa7146_video_uops.irq_done(dev,isr);
447 if (0 != (isr & (MASK_28))) {
448 u32 mc2 = saa7146_read(dev, MC2);
449 if( 0 != (mc2 & MASK_15)) {
450 DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr);
451 wake_up(&dev->vv_data->vbi_wq);
452 saa7146_write(dev,MC2, MASK_31);
455 DEB_INT("irq: RPS1 (0x%08x)\n", isr);
456 saa7146_vbi_uops.irq_done(dev,isr);
460 static const struct v4l2_ctrl_ops saa7146_ctrl_ops = {
461 .s_ctrl = saa7146_s_ctrl,
464 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
466 struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler;
467 struct v4l2_pix_format *fmt;
468 struct v4l2_vbi_format *vbi;
469 struct saa7146_vv *vv;
472 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
476 v4l2_ctrl_handler_init(hdl, 6);
477 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
478 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
479 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
480 V4L2_CID_CONTRAST, 0, 127, 1, 64);
481 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
482 V4L2_CID_SATURATION, 0, 127, 1, 64);
483 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
484 V4L2_CID_VFLIP, 0, 1, 1, 0);
485 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
486 V4L2_CID_HFLIP, 0, 1, 1, 0);
489 v4l2_ctrl_handler_free(hdl);
490 v4l2_device_unregister(&dev->v4l2_dev);
493 dev->v4l2_dev.ctrl_handler = hdl;
495 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
497 ERR("out of memory. aborting.\n");
498 v4l2_ctrl_handler_free(hdl);
499 v4l2_device_unregister(&dev->v4l2_dev);
502 ext_vv->vid_ops = saa7146_video_ioctl_ops;
503 ext_vv->vbi_ops = saa7146_vbi_ioctl_ops;
504 ext_vv->core_ops = &saa7146_video_ioctl_ops;
506 DEB_EE("dev:%p\n", dev);
508 /* set default values for video parts of the saa7146 */
509 saa7146_write(dev, BCS_CTRL, 0x80400040);
511 /* enable video-port pins */
512 saa7146_write(dev, MC1, (MASK_10 | MASK_26));
514 /* save per-device extension data (one extension can
515 handle different devices that might need different
516 configuration data) */
517 dev->ext_vv_data = ext_vv;
519 vv->d_clipping.cpu_addr =
520 dma_alloc_coherent(&dev->pci->dev, SAA7146_CLIPPING_MEM,
521 &vv->d_clipping.dma_handle, GFP_KERNEL);
522 if( NULL == vv->d_clipping.cpu_addr ) {
523 ERR("out of memory. aborting.\n");
525 v4l2_ctrl_handler_free(hdl);
526 v4l2_device_unregister(&dev->v4l2_dev);
530 saa7146_video_uops.init(dev,vv);
531 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
532 saa7146_vbi_uops.init(dev,vv);
534 vv->ov_fb.fmt.width = vv->standard->h_max_out;
535 vv->ov_fb.fmt.height = vv->standard->v_max_out;
536 vv->ov_fb.fmt.pixelformat = V4L2_PIX_FMT_RGB565;
537 vv->ov_fb.fmt.bytesperline = 2 * vv->ov_fb.fmt.width;
538 vv->ov_fb.fmt.sizeimage = vv->ov_fb.fmt.bytesperline * vv->ov_fb.fmt.height;
539 vv->ov_fb.fmt.colorspace = V4L2_COLORSPACE_SRGB;
541 fmt = &vv->video_fmt;
544 fmt->pixelformat = V4L2_PIX_FMT_BGR24;
545 fmt->field = V4L2_FIELD_ANY;
546 fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
547 fmt->bytesperline = 3 * fmt->width;
548 fmt->sizeimage = fmt->bytesperline * fmt->height;
551 vbi->sampling_rate = 27000000;
552 vbi->offset = 248; /* todo */
553 vbi->samples_per_line = 720 * 2;
554 vbi->sample_format = V4L2_PIX_FMT_GREY;
556 /* fixme: this only works for PAL */
562 timer_setup(&vv->vbi_read_timeout, NULL, 0);
564 vv->ov_fb.capability = V4L2_FBUF_CAP_LIST_CLIPPING;
565 vv->ov_fb.flags = V4L2_FBUF_FLAG_PRIMARY;
567 dev->vv_callback = &vv_callback;
571 EXPORT_SYMBOL_GPL(saa7146_vv_init);
573 int saa7146_vv_release(struct saa7146_dev* dev)
575 struct saa7146_vv *vv = dev->vv_data;
577 DEB_EE("dev:%p\n", dev);
579 v4l2_device_unregister(&dev->v4l2_dev);
580 dma_free_coherent(&dev->pci->dev, SAA7146_CLIPPING_MEM,
581 vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
582 v4l2_ctrl_handler_free(&dev->ctrl_handler);
585 dev->vv_callback = NULL;
589 EXPORT_SYMBOL_GPL(saa7146_vv_release);
591 int saa7146_register_device(struct video_device *vfd, struct saa7146_dev *dev,
592 char *name, int type)
597 DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type);
599 vfd->fops = &video_fops;
600 if (type == VFL_TYPE_VIDEO)
601 vfd->ioctl_ops = &dev->ext_vv_data->vid_ops;
603 vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops;
604 vfd->release = video_device_release_empty;
605 vfd->lock = &dev->v4l2_lock;
606 vfd->v4l2_dev = &dev->v4l2_dev;
608 for (i = 0; i < dev->ext_vv_data->num_stds; i++)
609 vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
610 strscpy(vfd->name, name, sizeof(vfd->name));
611 vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY |
612 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
613 vfd->device_caps |= dev->ext_vv_data->capabilities;
614 if (type == VFL_TYPE_VIDEO)
616 ~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT);
619 ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_AUDIO);
620 video_set_drvdata(vfd, dev);
622 err = video_register_device(vfd, type, -1);
624 ERR("cannot register v4l2 device. skipping.\n");
628 pr_info("%s: registered device %s [v4l2]\n",
629 dev->name, video_device_node_name(vfd));
632 EXPORT_SYMBOL_GPL(saa7146_register_device);
634 int saa7146_unregister_device(struct video_device *vfd, struct saa7146_dev *dev)
636 DEB_EE("dev:%p\n", dev);
638 video_unregister_device(vfd);
641 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
643 static int __init saa7146_vv_init_module(void)
649 static void __exit saa7146_vv_cleanup_module(void)
653 module_init(saa7146_vv_init_module);
654 module_exit(saa7146_vv_cleanup_module);
656 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
657 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
658 MODULE_LICENSE("GPL");