WebSVN - shark - Blame - Rev 425 - /shark/trunk/drivers/cm7326/saa7146

Rev	Author	Line No.	Line
425	giacomo	1	#include <media/saa7146_vv.h>
		2
		3	#define BOARD_CAN_DO_VBI(dev) (dev->revision != 0 && dev->vv_data->vbi_minor != -1)
		4
		5	/****************************************************************************/
		6	/* resource management functions, shamelessly stolen from saa7134 driver */
		7
		8	int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
		9	{
		10	struct saa7146_dev *dev = fh->dev;
		11	struct saa7146_vv *vv = dev->vv_data;
		12
		13	if (fh->resources & bit)
		14	/* have it already allocated */
		15	return 1;
		16
		17	/* is it free? */
		18	DEB_D(("getting lock...\n"));
		19	down(&dev->lock);
		20	DEB_D(("got lock\n"));
		21	if (vv->resources & bit) {
		22	DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));
		23	/* no, someone else uses it */
		24	up(&dev->lock);
		25	return 0;
		26	}
		27	/* it's free, grab it */
		28	fh->resources \|= bit;
		29	vv->resources \|= bit;
		30	DEB_D(("res: get %d\n",bit));
		31	up(&dev->lock);
		32	return 1;
		33	}
		34
		35	int saa7146_res_check(struct saa7146_fh *fh, unsigned int bit)
		36	{
		37	return (fh->resources & bit);
		38	}
		39
		40	int saa7146_res_locked(struct saa7146_dev *dev, unsigned int bit)
		41	{
		42	struct saa7146_vv *vv = dev->vv_data;
		43	return (vv->resources & bit);
		44	}
		45
		46	void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
		47	{
		48	struct saa7146_dev *dev = fh->dev;
		49	struct saa7146_vv *vv = dev->vv_data;
		50
		51	if ((fh->resources & bits) != bits)
		52	BUG();
		53
		54	DEB_D(("getting lock...\n"));
		55	down(&dev->lock);
		56	DEB_D(("got lock\n"));
		57	fh->resources &= ~bits;
		58	vv->resources &= ~bits;
		59	DEB_D(("res: put %d\n",bits));
		60	up(&dev->lock);
		61	}
		62
		63
		64	/********************************************************************************/
		65	/* common dma functions */
		66
		67	void saa7146_dma_free(struct saa7146_dev dev,struct saa7146_buf buf)
		68	{
		69	DEB_EE(("dev:%p, buf:%p\n",dev,buf));
		70
		71	if (in_interrupt())
		72	BUG();
		73
		74	videobuf_waiton(&buf->vb,0,0);
		75	videobuf_dma_pci_unmap(dev->pci, &buf->vb.dma);
		76	videobuf_dma_free(&buf->vb.dma);
		77	buf->vb.state = STATE_NEEDS_INIT;
		78	}
		79
		80
		81	/********************************************************************************/
		82	/* common buffer functions */
		83
		84	int saa7146_buffer_queue(struct saa7146_dev *dev,
		85	struct saa7146_dmaqueue *q,
		86	struct saa7146_buf *buf)
		87	{
		88	#if DEBUG_SPINLOCKS
		89	BUG_ON(!spin_is_locked(&dev->slock));
		90	#endif
		91	DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));
		92
		93	if( NULL == q ) {
		94	ERR(("internal error: fatal NULL pointer for q.\n"));
		95	return 0;
		96	}
		97
		98	if (NULL == q->curr) {
		99	q->curr = buf;
		100	DEB_D(("immediately activating buffer %p\n", buf));
		101	buf->activate(dev,buf,NULL);
		102	} else {
		103	list_add_tail(&buf->vb.queue,&q->queue);
		104	buf->vb.state = STATE_QUEUED;
		105	DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
		106	}
		107	return 0;
		108	}
		109
		110	void saa7146_buffer_finish(struct saa7146_dev *dev,
		111	struct saa7146_dmaqueue *q,
		112	int state)
		113	{
		114	#if DEBUG_SPINLOCKS
		115	BUG_ON(!spin_is_locked(&dev->slock));
		116	#endif
		117	if( NULL == q->curr ) {
		118	ERR(("internal error: fatal NULL pointer for q->curr.\n"));
		119	return;
		120	}
		121
		122	DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
		123	DEB_EE(("q->curr:%p\n",q->curr));
		124
		125	/* finish current buffer */
		126	if (NULL == q->curr) {
		127	DEB_D(("aiii. no current buffer\n"));
		128	return;
		129	}
		130
		131	q->curr->vb.state = state;
		132	do_gettimeofday(&q->curr->vb.ts);
		133	wake_up(&q->curr->vb.done);
		134
		135	q->curr = NULL;
		136	}
		137
		138	void saa7146_buffer_next(struct saa7146_dev *dev,
		139	struct saa7146_dmaqueue *q, int vbi)
		140	{
		141	struct saa7146_buf buf,next = NULL;
		142
		143	if( NULL == q ) {
		144	ERR(("internal error: fatal NULL pointer for q.\n"));
		145	return;
		146	}
		147
		148	DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));
		149
		150	#if DEBUG_SPINLOCKS
		151	BUG_ON(!spin_is_locked(&dev->slock));
		152	#endif
		153	if (!list_empty(&q->queue)) {
		154	/* activate next one from queue */
		155	buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
		156	list_del(&buf->vb.queue);
		157	if (!list_empty(&q->queue))
		158	next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
		159	q->curr = buf;
		160	DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
		161	buf->activate(dev,buf,next);
		162	} else {
		163	DEB_INT(("no next buffer. stopping.\n"));
		164	if( 0 != vbi ) {
		165	/* turn off video-dma3 */
		166	saa7146_write(dev,MC1, MASK_20);
		167	} else {
		168	/* nothing to do -- just prevent next video-dma1 transfer
		169	by lowering the protection address */
		170
		171	// fixme: fix this for vflip != 0
		172
		173	saa7146_write(dev, PROT_ADDR1, 0);
		174	saa7146_write(dev, MC2, (MASK_02\|MASK_18));
		175
		176	/* write the address of the rps-program */
		177	saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
		178	/* turn on rps */
		179	saa7146_write(dev, MC1, (MASK_12 \| MASK_28));
		180
		181	/*
		182	printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
		183	printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
		184	printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
		185	printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
		186	printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
		187	printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
		188	*/
		189	}
		190	del_timer(&q->timeout);
		191	}
		192	}
		193
		194	void saa7146_buffer_timeout(unsigned long data)
		195	{
		196	struct saa7146_dmaqueue q = (struct saa7146_dmaqueue)data;
		197	struct saa7146_dev *dev = q->dev;
		198	unsigned long flags;
		199
		200	DEB_EE(("dev:%p, dmaq:%p\n", dev, q));
		201
		202	spin_lock_irqsave(&dev->slock,flags);
		203	if (q->curr) {
		204	DEB_D(("timeout on %p\n", q->curr));
		205	saa7146_buffer_finish(dev,q,STATE_ERROR);
		206	}
		207
		208	/* we don't restart the transfer here like other drivers do. when
		209	a streaming capture is disabled, the timeout function will be
		210	called for the current buffer. if we activate the next buffer now,
		211	we mess up our capture logic. if a timeout occurs on another buffer,
		212	then something is seriously broken before, so no need to buffer the
		213	next capture IMHO... */
		214	/*
		215	saa7146_buffer_next(dev,q);
		216	*/
		217	spin_unlock_irqrestore(&dev->slock,flags);
		218	}
		219
		220	/********************************************************************************/
		221	/* file operations */
		222
		223	static int fops_open(struct inode inode, struct file file)
		224	{
		225	unsigned int minor = iminor(inode);
		226	struct saa7146_dev h = NULL, dev = NULL;
		227	struct list_head *list;
		228	struct saa7146_fh *fh = NULL;
		229	int result = 0;
		230
		231	enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		232
		233	DEB_EE(("inode:%p, file:%p, minor:%d\n",inode,file,minor));
		234
		235	if (down_interruptible(&saa7146_devices_lock))
		236	return -ERESTARTSYS;
		237
		238	list_for_each(list,&saa7146_devices) {
		239	h = list_entry(list, struct saa7146_dev, item);
		240	if( NULL == h->vv_data ) {
		241	DEB_D(("device %p has not registered video devices.\n",h));
		242	continue;
		243	}
		244	DEB_D(("trying: %p @ major %d,%d\n",h,h->vv_data->video_minor,h->vv_data->vbi_minor));
		245
		246	if (h->vv_data->video_minor == minor) {
		247	dev = h;
		248	}
		249	if (h->vv_data->vbi_minor == minor) {
		250	type = V4L2_BUF_TYPE_VBI_CAPTURE;
		251	dev = h;
		252	}
		253	}
		254	if (NULL == dev) {
		255	DEB_S(("no such video device.\n"));
		256	result = -ENODEV;
		257	goto out;
		258	}
		259
		260	DEB_D(("using: %p\n",dev));
		261
		262	/* check if an extension is registered */
		263	if( NULL == dev->ext ) {
		264	DEB_S(("no extension registered for this device.\n"));
		265	result = -ENODEV;
		266	goto out;
		267	}
		268
		269	/* allocate per open data */
		270	fh = kmalloc(sizeof(*fh),GFP_KERNEL);
		271	if (NULL == fh) {
		272	DEB_S(("cannot allocate memory for per open data.\n"));
		273	result = -ENOMEM;
		274	goto out;
		275	}
		276	memset(fh,0,sizeof(*fh));
		277
		278	file->private_data = fh;
		279	fh->dev = dev;
		280	fh->type = type;
		281
		282	if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
		283	DEB_S(("initializing vbi...\n"));
		284	result = saa7146_vbi_uops.open(dev,file);
		285	} else {
		286	DEB_S(("initializing video...\n"));
		287	result = saa7146_video_uops.open(dev,file);
		288	}
		289
		290	if (0 != result) {
		291	goto out;
		292	}
		293
		294	if( 0 == try_module_get(dev->ext->module)) {
		295	result = -EINVAL;
		296	goto out;
		297	}
		298
		299	result = 0;
		300	out:
		301	if( fh != 0 && result != 0 ) {
		302	kfree(fh);
		303	file->private_data = NULL;
		304	}
		305	up(&saa7146_devices_lock);
		306	return result;
		307	}
		308
		309	static int fops_release(struct inode inode, struct file file)
		310	{
		311	struct saa7146_fh *fh = file->private_data;
		312	struct saa7146_dev *dev = fh->dev;
		313
		314	DEB_EE(("inode:%p, file:%p\n",inode,file));
		315
		316	if (down_interruptible(&saa7146_devices_lock))
		317	return -ERESTARTSYS;
		318
		319	if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
		320	saa7146_vbi_uops.release(dev,file);
		321	} else {
		322	saa7146_video_uops.release(dev,file);
		323	}
		324
		325	module_put(dev->ext->module);
		326	file->private_data = NULL;
		327	kfree(fh);
		328
		329	up(&saa7146_devices_lock);
		330
		331	return 0;
		332	}
		333
		334	int saa7146_video_do_ioctl(struct inode inode, struct file file, unsigned int cmd, void *arg);
		335	static int fops_ioctl(struct inode inode, struct file file, unsigned int cmd, unsigned long arg)
		336	{
		337	/*
		338	DEB_EE(("inode:%p, file:%p, cmd:%d, arg:%li\n",inode, file, cmd, arg));
		339	*/
		340	return video_usercopy(inode, file, cmd, arg, saa7146_video_do_ioctl);
		341	}
		342
		343	static int fops_mmap(struct file file, struct vm_area_struct vma)
		344	{
		345	struct saa7146_fh *fh = file->private_data;
		346	struct videobuf_queue *q;
		347
		348	switch (fh->type) {
		349	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
		350	DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
		351	q = &fh->video_q;
		352	break;
		353	}
		354	case V4L2_BUF_TYPE_VBI_CAPTURE: {
		355	DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
		356	q = &fh->vbi_q;
		357	break;
		358	}
		359	default:
		360	BUG();
		361	return 0;
		362	}
		363	return videobuf_mmap_mapper(vma,q);
		364	}
		365
		366	static unsigned int fops_poll(struct file file, struct poll_table_struct wait)
		367	{
		368	struct saa7146_fh *fh = file->private_data;
		369	struct videobuf_buffer *buf = NULL;
		370	struct videobuf_queue *q;
		371
		372	DEB_EE(("file:%p, poll:%p\n",file, wait));
		373
		374	if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
		375	if( 0 == fh->vbi_q.streaming )
		376	return videobuf_poll_stream(file, &fh->vbi_q, wait);
		377	q = &fh->vbi_q;
		378	} else {
		379	DEB_D(("using video queue.\n"));
		380	q = &fh->video_q;
		381	}
		382
		383	if (!list_empty(&q->stream))
		384	buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
		385
		386	if (!buf) {
		387	DEB_D(("buf == NULL!\n"));
		388	return POLLERR;
		389	}
		390
		391	poll_wait(file, &buf->done, wait);
		392	if (buf->state == STATE_DONE \|\| buf->state == STATE_ERROR) {
		393	DEB_D(("poll succeeded!\n"));
		394	return POLLIN\|POLLRDNORM;
		395	}
		396
		397	DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
		398	return 0;
		399	}
		400
		401	static ssize_t fops_read(struct file file, char data, size_t count, loff_t *ppos)
		402	{
		403	struct saa7146_fh *fh = file->private_data;
		404
		405	switch (fh->type) {
		406	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
		407	// DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
		408	return saa7146_video_uops.read(file,data,count,ppos);
		409	}
		410	case V4L2_BUF_TYPE_VBI_CAPTURE: {
		411	// DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
		412	return saa7146_vbi_uops.read(file,data,count,ppos);
		413	}
		414	break;
		415	default:
		416	BUG();
		417	return 0;
		418	}
		419	}
		420
		421	static struct file_operations video_fops =
		422	{
		423	.owner = THIS_MODULE,
		424	.open = fops_open,
		425	.release = fops_release,
		426	.read = fops_read,
		427	.poll = fops_poll,
		428	.mmap = fops_mmap,
		429	.ioctl = fops_ioctl,
		430	.llseek = no_llseek,
		431	};
		432
		433	void vv_callback(struct saa7146_dev *dev, unsigned long status)
		434	{
		435	u32 isr = status;
		436
		437	DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
		438
		439	if (0 != (isr & (MASK_27))) {
		440	DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
		441	saa7146_video_uops.irq_done(dev,isr);
		442	}
		443
		444	if (0 != (isr & (MASK_28))) {
		445	u32 mc2 = saa7146_read(dev, MC2);
		446	if( 0 != (mc2 & MASK_15)) {
		447	DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
		448	wake_up(&dev->vv_data->vbi_wq);
		449	saa7146_write(dev,MC2, MASK_31);
		450	return;
		451	}
		452	DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
		453	saa7146_vbi_uops.irq_done(dev,isr);
		454	}
		455	}
		456
		457	static struct video_device device_template =
		458	{
		459	.hardware = VID_HARDWARE_SAA7146,
		460	.fops = &video_fops,
		461	.minor = -1,
		462	};
		463
		464	int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
		465	{
		466	struct saa7146_vv *vv = kmalloc (sizeof(struct saa7146_vv),GFP_KERNEL);
		467	if( NULL == vv ) {
		468	ERR(("out of memory. aborting.\n"));
		469	return -1;
		470	}
		471	memset(vv, 0x0, sizeof(*vv));
		472
		473	DEB_EE(("dev:%p\n",dev));
		474
		475	/* set default values for video parts of the saa7146 */
		476	saa7146_write(dev, BCS_CTRL, 0x80400040);
		477
		478	/* enable video-port pins */
		479	saa7146_write(dev, MC1, (MASK_10 \| MASK_26));
		480
		481	/* save per-device extension data (one extension can
		482	handle different devices that might need different
		483	configuration data) */
		484	dev->ext_vv_data = ext_vv;
		485
		486	vv->video_minor = -1;
		487	vv->vbi_minor = -1;
		488
		489	vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
		490	if( NULL == vv->d_clipping.cpu_addr ) {
		491	ERR(("out of memory. aborting.\n"));
		492	kfree(vv);
		493	return -1;
		494	}
		495	memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
		496
		497	saa7146_video_uops.init(dev,vv);
		498	saa7146_vbi_uops.init(dev,vv);
		499
		500	dev->vv_data = vv;
		501	dev->vv_callback = &vv_callback;
		502
		503	return 0;
		504	}
		505
		506	int saa7146_vv_release(struct saa7146_dev* dev)
		507	{
		508	struct saa7146_vv *vv = dev->vv_data;
		509
		510	DEB_EE(("dev:%p\n",dev));
		511
		512	pci_free_consistent(dev->pci, SAA7146_RPS_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
		513	kfree(vv);
		514	dev->vv_data = NULL;
		515	dev->vv_callback = NULL;
		516
		517	return 0;
		518	}
		519
		520	int saa7146_register_device(struct video_device vid, struct saa7146_dev dev, char *name, int type)
		521	{
		522	struct saa7146_vv *vv = dev->vv_data;
		523
		524	DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));
		525
		526	*vid = device_template;
		527	strlcpy(vid->name, name, sizeof(vid->name));
		528	vid->priv = dev;
		529
		530	// fixme: -1 should be an insmod parameter for the extension (like "video_nr");
		531	if (video_register_device(vid,type,-1) < 0) {
		532	ERR(("cannot register v4l2 device. skipping.\n"));
		533	return -1;
		534	}
		535
		536	if( VFL_TYPE_GRABBER == type ) {
		537	vv->video_minor = vid->minor;
		538	INFO(("%s: registered device video%d [v4l2]\n", dev->name,vid->minor & 0x1f));
		539	} else {
		540	vv->vbi_minor = vid->minor;
		541	INFO(("%s: registered device vbi%d [v4l2]\n", dev->name,vid->minor & 0x1f));
		542	}
		543
		544	return 0;
		545	}
		546
		547	int saa7146_unregister_device(struct video_device vid, struct saa7146_dev dev)
		548	{
		549	struct saa7146_vv *vv = dev->vv_data;
		550
		551	DEB_EE(("dev:%p\n",dev));
		552
		553	if( VFL_TYPE_GRABBER == vid->type ) {
		554	vv->video_minor = -1;
		555	} else {
		556	vv->vbi_minor = -1;
		557	}
		558	video_unregister_device(vid);
		559
		560	return 0;
		561	}
		562
		563	static int __init saa7146_vv_init_module(void)
		564	{
		565	return 0;
		566	}
		567
		568
		569	static void __exit saa7146_vv_cleanup_module(void)
		570	{
		571	}
		572
		573	module_init(saa7146_vv_init_module);
		574	module_exit(saa7146_vv_cleanup_module);
		575
		576	MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
		577	MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
		578	MODULE_LICENSE("GPL");

Subversion Repositories shark

(root)/shark/trunk/drivers/cm7326/saa7146_fops.c - Rev 425