[mirror_ubuntu-artful-kernel.git] / drivers / media / video / saa7134 / saa7134-ts.c

/*
 *
 * device driver for philips saa7134 based TV cards
 * video4linux video interface
 *
 * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/delay.h>

#include "saa7134-reg.h"
#include "saa7134.h"

/* ------------------------------------------------------------------ */

static unsigned int ts_debug;
module_param(ts_debug, int, 0644);
MODULE_PARM_DESC(ts_debug,"enable debug messages [ts]");

#define dprintk(fmt, arg...)	if (ts_debug) \
	printk(KERN_DEBUG "%s/ts: " fmt, dev->name , ## arg)

/* ------------------------------------------------------------------ */

static int buffer_activate(struct saa7134_dev *dev,
			   struct saa7134_buf *buf,
			   struct saa7134_buf *next)
{

	dprintk("buffer_activate [%p]",buf);
	buf->vb.state = VIDEOBUF_ACTIVE;
	buf->top_seen = 0;

	if (NULL == next)
		next = buf;
	if (V4L2_FIELD_TOP == buf->vb.field) {
		dprintk("- [top]     buf=%p next=%p\n",buf,next);
		saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(buf));
		saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(next));
	} else {
		dprintk("- [bottom]  buf=%p next=%p\n",buf,next);
		saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(next));
		saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(buf));
	}

	/* start DMA */
	saa7134_set_dmabits(dev);

	mod_timer(&dev->ts_q.timeout, jiffies+BUFFER_TIMEOUT);
	return 0;
}

static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
			  enum v4l2_field field)
{
	struct saa7134_dev *dev = q->priv_data;
	struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
	unsigned int lines, llength, size;
	u32 control;
	int err;

	dprintk("buffer_prepare [%p,%s]\n",buf,v4l2_field_names[field]);

	llength = TS_PACKET_SIZE;
	lines = dev->ts.nr_packets;

	size = lines * llength;
	if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
		return -EINVAL;

	if (buf->vb.size != size) {
		saa7134_dma_free(q,buf);
	}

	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
		struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);

		buf->vb.width  = llength;
		buf->vb.height = lines;
		buf->vb.size   = size;
		buf->pt        = &dev->ts.pt_ts;

		err = videobuf_iolock(q,&buf->vb,NULL);
		if (err)
			goto oops;
		err = saa7134_pgtable_build(dev->pci,buf->pt,
					    dma->sglist,
					    dma->sglen,
					    saa7134_buffer_startpage(buf));
		if (err)
			goto oops;
	}

	/* dma: setup channel 5 (= TS) */
	control = SAA7134_RS_CONTROL_BURST_16 |
		  SAA7134_RS_CONTROL_ME |
		  (buf->pt->dma >> 12);

	saa_writeb(SAA7134_TS_DMA0, ((lines-1)&0xff));
	saa_writeb(SAA7134_TS_DMA1, (((lines-1)>>8)&0xff));
	saa_writeb(SAA7134_TS_DMA2, ((((lines-1)>>16)&0x3f) | 0x00)); /* TSNOPIT=0, TSCOLAP=0 */
	saa_writel(SAA7134_RS_PITCH(5),TS_PACKET_SIZE);
	saa_writel(SAA7134_RS_CONTROL(5),control);

	buf->vb.state = VIDEOBUF_PREPARED;
	buf->activate = buffer_activate;
	buf->vb.field = field;
	return 0;

 oops:
	saa7134_dma_free(q,buf);
	return err;
}

static int
buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
{
	struct saa7134_dev *dev = q->priv_data;

	*size = TS_PACKET_SIZE * dev->ts.nr_packets;
	if (0 == *count)
		*count = dev->ts.nr_bufs;
	*count = saa7134_buffer_count(*size,*count);
	return 0;
}

static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
	struct saa7134_dev *dev = q->priv_data;
	struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);

	saa7134_buffer_queue(dev,&dev->ts_q,buf);
}

static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
	struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);

	saa7134_dma_free(q,buf);
}

struct videobuf_queue_ops saa7134_ts_qops = {
	.buf_setup    = buffer_setup,
	.buf_prepare  = buffer_prepare,
	.buf_queue    = buffer_queue,
	.buf_release  = buffer_release,
};
EXPORT_SYMBOL_GPL(saa7134_ts_qops);

/* ----------------------------------------------------------- */
/* exported stuff                                              */

static unsigned int tsbufs = 8;
module_param(tsbufs, int, 0444);
MODULE_PARM_DESC(tsbufs,"number of ts buffers, range 2-32");

static unsigned int ts_nr_packets = 64;
module_param(ts_nr_packets, int, 0444);
MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)");

int saa7134_ts_init_hw(struct saa7134_dev *dev)
{
	/* deactivate TS softreset */
	saa_writeb(SAA7134_TS_SERIAL1, 0x00);
	/* TSSOP high active, TSVAL high active, TSLOCK ignored */
	saa_writeb(SAA7134_TS_PARALLEL, 0xec);
	saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1));
	saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff));
	saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff));
	/* TSNOPIT=0, TSCOLAP=0 */
	saa_writeb(SAA7134_TS_DMA2,
		((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00));

	return 0;
}

int saa7134_ts_init1(struct saa7134_dev *dev)
{
	/* sanitycheck insmod options */
	if (tsbufs < 2)
		tsbufs = 2;
	if (tsbufs > VIDEO_MAX_FRAME)
		tsbufs = VIDEO_MAX_FRAME;
	if (ts_nr_packets < 4)
		ts_nr_packets = 4;
	if (ts_nr_packets > 312)
		ts_nr_packets = 312;
	dev->ts.nr_bufs    = tsbufs;
	dev->ts.nr_packets = ts_nr_packets;

	INIT_LIST_HEAD(&dev->ts_q.queue);
	init_timer(&dev->ts_q.timeout);
	dev->ts_q.timeout.function = saa7134_buffer_timeout;
	dev->ts_q.timeout.data     = (unsigned long)(&dev->ts_q);
	dev->ts_q.dev              = dev;
	dev->ts_q.need_two         = 1;
	saa7134_pgtable_alloc(dev->pci,&dev->ts.pt_ts);

	/* init TS hw */
	saa7134_ts_init_hw(dev);

	return 0;
}

int saa7134_ts_fini(struct saa7134_dev *dev)
{
	saa7134_pgtable_free(dev->pci,&dev->ts.pt_ts);
	return 0;
}


void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status)
{
	enum v4l2_field field;

	spin_lock(&dev->slock);
	if (dev->ts_q.curr) {
		field = dev->ts_q.curr->vb.field;
		if (field == V4L2_FIELD_TOP) {
			if ((status & 0x100000) != 0x000000)
				goto done;
		} else {
			if ((status & 0x100000) != 0x100000)
				goto done;
		}
		saa7134_buffer_finish(dev,&dev->ts_q,VIDEOBUF_DONE);
	}
	saa7134_buffer_next(dev,&dev->ts_q);

 done:
	spin_unlock(&dev->slock);
}

/* ----------------------------------------------------------- */
/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	*
	3	* device driver for philips saa7134 based TV cards
	4	* video4linux video interface
	5	*
	6	* (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	21	*/
	22
	23	#include <linux/init.h>
	24	#include <linux/list.h>
	25	#include <linux/module.h>
1da177e4 LT	26	#include <linux/kernel.h>
	27	#include <linux/slab.h>
	28	#include <linux/delay.h>
	29
	30	#include "saa7134-reg.h"
	31	#include "saa7134.h"
	32
	33	/* ------------------------------------------------------------------ */
	34
ff699e6b	35	static unsigned int ts_debug;
1da177e4 LT	36	module_param(ts_debug, int, 0644);
	37	MODULE_PARM_DESC(ts_debug,"enable debug messages [ts]");
	38
	39	#define dprintk(fmt, arg...) if (ts_debug) \
	40	printk(KERN_DEBUG "%s/ts: " fmt, dev->name , ## arg)
	41
	42	/* ------------------------------------------------------------------ */
	43
	44	static int buffer_activate(struct saa7134_dev *dev,
	45	struct saa7134_buf *buf,
	46	struct saa7134_buf *next)
	47	{
1da177e4 LT	48
1da177e4 LT	49	dprintk("buffer_activate [%p]",buf);
0fc0686e	50	buf->vb.state = VIDEOBUF_ACTIVE;
1da177e4 LT	51	buf->top_seen = 0;
1da177e4 LT	52
1da177e4 LT	53	if (NULL == next)
	54	next = buf;
	55	if (V4L2_FIELD_TOP == buf->vb.field) {
	56	dprintk("- [top] buf=%p next=%p\n",buf,next);
	57	saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(buf));
	58	saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(next));
	59	} else {
	60	dprintk("- [bottom] buf=%p next=%p\n",buf,next);
	61	saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(next));
	62	saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(buf));
	63	}
1da177e4 LT	64
	65	/* start DMA */
	66	saa7134_set_dmabits(dev);
	67
	68	mod_timer(&dev->ts_q.timeout, jiffies+BUFFER_TIMEOUT);
	69	return 0;
	70	}
	71
	72	static int buffer_prepare(struct videobuf_queue q, struct videobuf_buffer vb,
	73	enum v4l2_field field)
	74	{
	75	struct saa7134_dev *dev = q->priv_data;
	76	struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
	77	unsigned int lines, llength, size;
3aa4f48a	78	u32 control;
1da177e4 LT	79	int err;
	80
	81	dprintk("buffer_prepare [%p,%s]\n",buf,v4l2_field_names[field]);
	82
	83	llength = TS_PACKET_SIZE;
	84	lines = dev->ts.nr_packets;
	85
	86	size = lines * llength;
	87	if (0 != buf->vb.baddr && buf->vb.bsize < size)
	88	return -EINVAL;
	89
	90	if (buf->vb.size != size) {
c7b0ac05	91	saa7134_dma_free(q,buf);
1da177e4 LT	92	}
1da177e4 LT	93
0fc0686e	94	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
c1accaa2 MCC	95	struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
c1accaa2 MCC	96
1da177e4 LT	97	buf->vb.width = llength;
	98	buf->vb.height = lines;
	99	buf->vb.size = size;
	100	buf->pt = &dev->ts.pt_ts;
	101
c7b0ac05	102	err = videobuf_iolock(q,&buf->vb,NULL);
1da177e4 LT	103	if (err)
	104	goto oops;
	105	err = saa7134_pgtable_build(dev->pci,buf->pt,
c1accaa2 MCC	106	dma->sglist,
c1accaa2 MCC	107	dma->sglen,
1da177e4 LT	108	saa7134_buffer_startpage(buf));
	109	if (err)
	110	goto oops;
	111	}
3aa4f48a HH	112
	113	/* dma: setup channel 5 (= TS) */
	114	control = SAA7134_RS_CONTROL_BURST_16 \|
4ac97914 MCC	115	SAA7134_RS_CONTROL_ME \|
4ac97914 MCC	116	(buf->pt->dma >> 12);
3aa4f48a HH	117
	118	saa_writeb(SAA7134_TS_DMA0, ((lines-1)&0xff));
	119	saa_writeb(SAA7134_TS_DMA1, (((lines-1)>>8)&0xff));
	120	saa_writeb(SAA7134_TS_DMA2, ((((lines-1)>>16)&0x3f) \| 0x00)); /* TSNOPIT=0, TSCOLAP=0 */
	121	saa_writel(SAA7134_RS_PITCH(5),TS_PACKET_SIZE);
	122	saa_writel(SAA7134_RS_CONTROL(5),control);
	123
0fc0686e	124	buf->vb.state = VIDEOBUF_PREPARED;
1da177e4 LT	125	buf->activate = buffer_activate;
	126	buf->vb.field = field;
	127	return 0;
	128
	129	oops:
c7b0ac05	130	saa7134_dma_free(q,buf);
1da177e4 LT	131	return err;
	132	}
	133
	134	static int
	135	buffer_setup(struct videobuf_queue q, unsigned int count, unsigned int *size)
	136	{
	137	struct saa7134_dev *dev = q->priv_data;
	138
	139	size = TS_PACKET_SIZE dev->ts.nr_packets;
	140	if (0 == *count)
	141	*count = dev->ts.nr_bufs;
	142	count = saa7134_buffer_count(size,*count);
	143	return 0;
	144	}
	145
	146	static void buffer_queue(struct videobuf_queue q, struct videobuf_buffer vb)
	147	{
	148	struct saa7134_dev *dev = q->priv_data;
	149	struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
	150
	151	saa7134_buffer_queue(dev,&dev->ts_q,buf);
	152	}
	153
	154	static void buffer_release(struct videobuf_queue q, struct videobuf_buffer vb)
	155	{
1da177e4 LT	156	struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
1da177e4 LT	157
c7b0ac05	158	saa7134_dma_free(q,buf);
1da177e4 LT	159	}
	160
	161	struct videobuf_queue_ops saa7134_ts_qops = {
	162	.buf_setup = buffer_setup,
	163	.buf_prepare = buffer_prepare,
	164	.buf_queue = buffer_queue,
	165	.buf_release = buffer_release,
	166	};
	167	EXPORT_SYMBOL_GPL(saa7134_ts_qops);
	168
	169	/* ----------------------------------------------------------- */
	170	/* exported stuff */
	171
3aa4f48a	172	static unsigned int tsbufs = 8;
1da177e4 LT	173	module_param(tsbufs, int, 0444);
	174	MODULE_PARM_DESC(tsbufs,"number of ts buffers, range 2-32");
	175
3aa4f48a	176	static unsigned int ts_nr_packets = 64;
1da177e4 LT	177	module_param(ts_nr_packets, int, 0444);
	178	MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)");
	179
cb71201f ML	180	int saa7134_ts_init_hw(struct saa7134_dev *dev)
	181	{
	182	/* deactivate TS softreset */
	183	saa_writeb(SAA7134_TS_SERIAL1, 0x00);
	184	/* TSSOP high active, TSVAL high active, TSLOCK ignored */
	185	saa_writeb(SAA7134_TS_PARALLEL, 0xec);
	186	saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1));
	187	saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff));
	188	saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff));
	189	/* TSNOPIT=0, TSCOLAP=0 */
	190	saa_writeb(SAA7134_TS_DMA2,
	191	((((dev->ts.nr_packets-1)>>16)&0x3f) \| 0x00));
	192
	193	return 0;
	194	}
	195
1da177e4 LT	196	int saa7134_ts_init1(struct saa7134_dev *dev)
	197	{
	198	/* sanitycheck insmod options */
	199	if (tsbufs < 2)
	200	tsbufs = 2;
	201	if (tsbufs > VIDEO_MAX_FRAME)
	202	tsbufs = VIDEO_MAX_FRAME;
	203	if (ts_nr_packets < 4)
	204	ts_nr_packets = 4;
	205	if (ts_nr_packets > 312)
	206	ts_nr_packets = 312;
	207	dev->ts.nr_bufs = tsbufs;
	208	dev->ts.nr_packets = ts_nr_packets;
	209
	210	INIT_LIST_HEAD(&dev->ts_q.queue);
	211	init_timer(&dev->ts_q.timeout);
	212	dev->ts_q.timeout.function = saa7134_buffer_timeout;
	213	dev->ts_q.timeout.data = (unsigned long)(&dev->ts_q);
	214	dev->ts_q.dev = dev;
	215	dev->ts_q.need_two = 1;
	216	saa7134_pgtable_alloc(dev->pci,&dev->ts.pt_ts);
	217
	218	/* init TS hw */
cb71201f	219	saa7134_ts_init_hw(dev);
1da177e4 LT	220
	221	return 0;
	222	}
	223
	224	int saa7134_ts_fini(struct saa7134_dev *dev)
	225	{
	226	saa7134_pgtable_free(dev->pci,&dev->ts.pt_ts);
	227	return 0;
	228	}
	229
	230
	231	void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status)
	232	{
	233	enum v4l2_field field;
	234
	235	spin_lock(&dev->slock);
	236	if (dev->ts_q.curr) {
	237	field = dev->ts_q.curr->vb.field;
	238	if (field == V4L2_FIELD_TOP) {
3aa4f48a	239	if ((status & 0x100000) != 0x000000)
1da177e4 LT	240	goto done;
1da177e4 LT	241	} else {
3aa4f48a	242	if ((status & 0x100000) != 0x100000)
1da177e4 LT	243	goto done;
1da177e4 LT	244	}
0fc0686e	245	saa7134_buffer_finish(dev,&dev->ts_q,VIDEOBUF_DONE);
1da177e4 LT	246	}
	247	saa7134_buffer_next(dev,&dev->ts_q);
	248
	249	done:
	250	spin_unlock(&dev->slock);
	251	}
	252
	253	/* ----------------------------------------------------------- */
	254	/*
	255	* Local variables:
	256	* c-basic-offset: 8
	257	* End:
	258	*/