WebSVN - shark - Blame - Rev 1618 - /shark/branches/xen/drivers/cm7326/saa7146

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

Subversion Repositories shark

(root)/shark/branches/xen/drivers/cm7326/saa7146_fops.c - Rev 1618