[deliverable/linux.git] / drivers / media / video / cx23885 / cx23885-vbi.c

/*
 *  Driver for the Conexant CX23885 PCIe bridge
 *
 *  Copyright (c) 2007 Steven Toth <stoth@linuxtv.org>
 *
 *  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/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>

#include "cx23885.h"

static unsigned int vbibufs = 4;
module_param(vbibufs, int, 0644);
MODULE_PARM_DESC(vbibufs, "number of vbi buffers, range 2-32");

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

#define dprintk(level, fmt, arg...)\
	do { if (vbi_debug >= level)\
		printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\
	} while (0)

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

int cx23885_vbi_fmt(struct file *file, void *priv,
	struct v4l2_format *f)
{
	struct cx23885_fh *fh = priv;
	struct cx23885_dev *dev = fh->dev;

	if (dev->tvnorm & V4L2_STD_525_60) {
		/* ntsc */
		f->fmt.vbi.sampling_rate = 28636363;
		f->fmt.vbi.start[0] = 10;
		f->fmt.vbi.start[1] = 273;

	} else if (dev->tvnorm & V4L2_STD_625_50) {
		/* pal */
		f->fmt.vbi.sampling_rate = 35468950;
		f->fmt.vbi.start[0] = 7 - 1;
		f->fmt.vbi.start[1] = 319 - 1;
	}
	return 0;
}

/* We're given the Video Interrupt status register.
 * The cx23885_video_irq() func has already validated
 * the potential error bits, we just need to
 * deal with vbi payload and return indication if
 * we actually processed any payload.
 */
int cx23885_vbi_irq(struct cx23885_dev *dev, u32 status)
{
	u32 count;
	int handled = 0;

	if (status & VID_BC_MSK_VBI_RISCI1) {
		dprintk(1, "%s() VID_BC_MSK_VBI_RISCI1\n", __func__);
		spin_lock(&dev->slock);
		count = cx_read(VID_A_GPCNT);
		cx23885_video_wakeup(dev, &dev->vbiq, count);
		spin_unlock(&dev->slock);
		handled++;
	}

	if (status & VID_BC_MSK_VBI_RISCI2) {
		dprintk(1, "%s() VID_BC_MSK_VBI_RISCI2\n", __func__);
		dprintk(2, "stopper vbi\n");
		spin_lock(&dev->slock);
		cx23885_restart_vbi_queue(dev, &dev->vbiq);
		spin_unlock(&dev->slock);
		handled++;
	}

	return handled;
}

static int cx23885_start_vbi_dma(struct cx23885_dev    *dev,
			 struct cx23885_dmaqueue *q,
			 struct cx23885_buffer   *buf)
{
	dprintk(1, "%s()\n", __func__);

	/* setup fifo + format */
	cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02],
				buf->vb.width, buf->risc.dma);

	/* reset counter */
	cx_write(VID_A_GPCNT_CTL, 3);
	q->count = 1;

	/* enable irq */
	cx23885_irq_add_enable(dev, 0x01);
	cx_set(VID_A_INT_MSK, 0x000022);

	/* start dma */
	cx_set(DEV_CNTRL2, (1<<5));
	cx_set(VID_A_DMA_CTL, 0x22); /* FIFO and RISC enable */

	return 0;
}


int cx23885_restart_vbi_queue(struct cx23885_dev    *dev,
			     struct cx23885_dmaqueue *q)
{
	struct cx23885_buffer *buf;
	struct list_head *item;

	if (list_empty(&q->active))
		return 0;

	buf = list_entry(q->active.next, struct cx23885_buffer, vb.queue);
	dprintk(2, "restart_queue [%p/%d]: restart dma\n",
		buf, buf->vb.i);
	cx23885_start_vbi_dma(dev, q, buf);
	list_for_each(item, &q->active) {
		buf = list_entry(item, struct cx23885_buffer, vb.queue);
		buf->count = q->count++;
	}
	mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
	return 0;
}

void cx23885_vbi_timeout(unsigned long data)
{
	struct cx23885_dev *dev = (struct cx23885_dev *)data;
	struct cx23885_dmaqueue *q = &dev->vbiq;
	struct cx23885_buffer *buf;
	unsigned long flags;

	cx23885_sram_channel_dump(dev, &dev->sram_channels[SRAM_CH02]);

	/* Stop the VBI engine */
	cx_clear(VID_A_DMA_CTL, 0x22);

	spin_lock_irqsave(&dev->slock, flags);
	while (!list_empty(&q->active)) {
		buf = list_entry(q->active.next, struct cx23885_buffer,
			vb.queue);
		list_del(&buf->vb.queue);
		buf->vb.state = VIDEOBUF_ERROR;
		wake_up(&buf->vb.done);
		printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->name,
		       buf, buf->vb.i, (unsigned long)buf->risc.dma);
	}
	cx23885_restart_vbi_queue(dev, q);
	spin_unlock_irqrestore(&dev->slock, flags);
}

/* ------------------------------------------------------------------ */
#define VBI_LINE_LENGTH 2048
#define VBI_LINE_COUNT 17

static int
vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
{
	*size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
	if (0 == *count)
		*count = vbibufs;
	if (*count < 2)
		*count = 2;
	if (*count > 32)
		*count = 32;
	return 0;
}

static int
vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
	    enum v4l2_field field)
{
	struct cx23885_fh *fh  = q->priv_data;
	struct cx23885_dev *dev = fh->dev;
	struct cx23885_buffer *buf = container_of(vb,
		struct cx23885_buffer, vb);
	struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
	unsigned int size;
	int rc;

	size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
	if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
		return -EINVAL;

	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
		buf->vb.width  = VBI_LINE_LENGTH;
		buf->vb.height = VBI_LINE_COUNT;
		buf->vb.size   = size;
		buf->vb.field  = V4L2_FIELD_SEQ_TB;

		rc = videobuf_iolock(q, &buf->vb, NULL);
		if (0 != rc)
			goto fail;
		cx23885_risc_buffer(dev->pci, &buf->risc,
				 dma->sglist,
				 0, buf->vb.width * buf->vb.height,
				 buf->vb.width, 0,
				 buf->vb.height);
	}
	buf->vb.state = VIDEOBUF_PREPARED;
	return 0;

 fail:
	cx23885_free_buffer(q, buf);
	return rc;
}

static void
vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
	struct cx23885_buffer   *buf =
		container_of(vb, struct cx23885_buffer, vb);
	struct cx23885_buffer   *prev;
	struct cx23885_fh       *fh   = vq->priv_data;
	struct cx23885_dev      *dev  = fh->dev;
	struct cx23885_dmaqueue *q    = &dev->vbiq;

	/* add jump to stopper */
	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
	buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
	buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */

	if (list_empty(&q->active)) {
		list_add_tail(&buf->vb.queue, &q->active);
		cx23885_start_vbi_dma(dev, q, buf);
		buf->vb.state = VIDEOBUF_ACTIVE;
		buf->count    = q->count++;
		mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
		dprintk(2, "[%p/%d] vbi_queue - first active\n",
			buf, buf->vb.i);

	} else {
		prev = list_entry(q->active.prev, struct cx23885_buffer,
			vb.queue);
		list_add_tail(&buf->vb.queue, &q->active);
		buf->vb.state = VIDEOBUF_ACTIVE;
		buf->count    = q->count++;
		prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
		prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63-32 */
		dprintk(2, "[%p/%d] buffer_queue - append to active\n",
			buf, buf->vb.i);
	}
}

static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
	struct cx23885_buffer *buf =
		container_of(vb, struct cx23885_buffer, vb);

	cx23885_free_buffer(q, buf);
}

struct videobuf_queue_ops cx23885_vbi_qops = {
	.buf_setup    = vbi_setup,
	.buf_prepare  = vbi_prepare,
	.buf_queue    = vbi_queue,
	.buf_release  = vbi_release,
};

/* ------------------------------------------------------------------ */
/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */
Commit	Line	Data
e47f30b1 ST	1	/*
	2	* Driver for the Conexant CX23885 PCIe bridge
	3	*
6d897616	4	* Copyright (c) 2007 Steven Toth <stoth@linuxtv.org>
e47f30b1 ST	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	*
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
	22	#include <linux/kernel.h>
	23	#include <linux/module.h>
	24	#include <linux/moduleparam.h>
	25	#include <linux/init.h>
e47f30b1 ST	26
	27	#include "cx23885.h"
	28
	29	static unsigned int vbibufs = 4;
	30	module_param(vbibufs, int, 0644);
	31	MODULE_PARM_DESC(vbibufs, "number of vbi buffers, range 2-32");
	32
4513fc69	33	static unsigned int vbi_debug;
e47f30b1 ST	34	module_param(vbi_debug, int, 0644);
	35	MODULE_PARM_DESC(vbi_debug, "enable debug messages [vbi]");
	36
4513fc69 ST	37	#define dprintk(level, fmt, arg...)\
	38	do { if (vbi_debug >= level)\
	39	printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\
	40	} while (0)
e47f30b1 ST	41
	42	/* ------------------------------------------------------------------ */
	43
	44	int cx23885_vbi_fmt(struct file file, void priv,
	45	struct v4l2_format *f)
	46	{
	47	struct cx23885_fh *fh = priv;
	48	struct cx23885_dev *dev = fh->dev;
	49
	50	if (dev->tvnorm & V4L2_STD_525_60) {
	51	/* ntsc */
	52	f->fmt.vbi.sampling_rate = 28636363;
	53	f->fmt.vbi.start[0] = 10;
	54	f->fmt.vbi.start[1] = 273;
	55
	56	} else if (dev->tvnorm & V4L2_STD_625_50) {
	57	/* pal */
	58	f->fmt.vbi.sampling_rate = 35468950;
	59	f->fmt.vbi.start[0] = 7 - 1;
	60	f->fmt.vbi.start[1] = 319 - 1;
	61	}
	62	return 0;
	63	}
	64
b5f74050 ST	65	/* We're given the Video Interrupt status register.
	66	* The cx23885_video_irq() func has already validated
	67	* the potential error bits, we just need to
	68	* deal with vbi payload and return indication if
	69	* we actually processed any payload.
	70	*/
	71	int cx23885_vbi_irq(struct cx23885_dev *dev, u32 status)
	72	{
	73	u32 count;
	74	int handled = 0;
	75
	76	if (status & VID_BC_MSK_VBI_RISCI1) {
	77	dprintk(1, "%s() VID_BC_MSK_VBI_RISCI1\n", __func__);
	78	spin_lock(&dev->slock);
	79	count = cx_read(VID_A_GPCNT);
	80	cx23885_video_wakeup(dev, &dev->vbiq, count);
	81	spin_unlock(&dev->slock);
	82	handled++;
	83	}
	84
	85	if (status & VID_BC_MSK_VBI_RISCI2) {
	86	dprintk(1, "%s() VID_BC_MSK_VBI_RISCI2\n", __func__);
	87	dprintk(2, "stopper vbi\n");
	88	spin_lock(&dev->slock);
	89	cx23885_restart_vbi_queue(dev, &dev->vbiq);
	90	spin_unlock(&dev->slock);
	91	handled++;
	92	}
	93
	94	return handled;
	95	}
	96
e47f30b1 ST	97	static int cx23885_start_vbi_dma(struct cx23885_dev *dev,
	98	struct cx23885_dmaqueue *q,
	99	struct cx23885_buffer *buf)
	100	{
b5f74050 ST	101	dprintk(1, "%s()\n", __func__);
b5f74050 ST	102
e47f30b1 ST	103	/* setup fifo + format */
	104	cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02],
	105	buf->vb.width, buf->risc.dma);
	106
	107	/* reset counter */
b5f74050	108	cx_write(VID_A_GPCNT_CTL, 3);
e47f30b1 ST	109	q->count = 1;
e47f30b1 ST	110
b5f74050	111	/* enable irq */
dbe83a3b	112	cx23885_irq_add_enable(dev, 0x01);
e47f30b1 ST	113	cx_set(VID_A_INT_MSK, 0x000022);
	114
	115	/* start dma */
	116	cx_set(DEV_CNTRL2, (1<<5));
b5f74050	117	cx_set(VID_A_DMA_CTL, 0x22); /* FIFO and RISC enable */
e47f30b1 ST	118
	119	return 0;
	120	}
	121
e47f30b1	122
b5f74050	123	int cx23885_restart_vbi_queue(struct cx23885_dev *dev,
e47f30b1 ST	124	struct cx23885_dmaqueue *q)
	125	{
	126	struct cx23885_buffer *buf;
	127	struct list_head *item;
	128
	129	if (list_empty(&q->active))
	130	return 0;
	131
	132	buf = list_entry(q->active.next, struct cx23885_buffer, vb.queue);
	133	dprintk(2, "restart_queue [%p/%d]: restart dma\n",
	134	buf, buf->vb.i);
	135	cx23885_start_vbi_dma(dev, q, buf);
	136	list_for_each(item, &q->active) {
	137	buf = list_entry(item, struct cx23885_buffer, vb.queue);
	138	buf->count = q->count++;
	139	}
	140	mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
	141	return 0;
	142	}
	143
	144	void cx23885_vbi_timeout(unsigned long data)
	145	{
	146	struct cx23885_dev dev = (struct cx23885_dev )data;
	147	struct cx23885_dmaqueue *q = &dev->vbiq;
	148	struct cx23885_buffer *buf;
	149	unsigned long flags;
	150
	151	cx23885_sram_channel_dump(dev, &dev->sram_channels[SRAM_CH02]);
	152
b5f74050	153	/* Stop the VBI engine */
e47f30b1 ST	154	cx_clear(VID_A_DMA_CTL, 0x22);
	155
	156	spin_lock_irqsave(&dev->slock, flags);
	157	while (!list_empty(&q->active)) {
	158	buf = list_entry(q->active.next, struct cx23885_buffer,
	159	vb.queue);
	160	list_del(&buf->vb.queue);
	161	buf->vb.state = VIDEOBUF_ERROR;
	162	wake_up(&buf->vb.done);
	163	printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->name,
	164	buf, buf->vb.i, (unsigned long)buf->risc.dma);
	165	}
	166	cx23885_restart_vbi_queue(dev, q);
	167	spin_unlock_irqrestore(&dev->slock, flags);
	168	}
	169
	170	/* ------------------------------------------------------------------ */
	171	#define VBI_LINE_LENGTH 2048
	172	#define VBI_LINE_COUNT 17
	173
	174	static int
	175	vbi_setup(struct videobuf_queue q, unsigned int count, unsigned int *size)
	176	{
	177	size = VBI_LINE_COUNT VBI_LINE_LENGTH * 2;
	178	if (0 == *count)
	179	*count = vbibufs;
	180	if (*count < 2)
	181	*count = 2;
	182	if (*count > 32)
	183	*count = 32;
	184	return 0;
	185	}
	186
	187	static int
	188	vbi_prepare(struct videobuf_queue q, struct videobuf_buffer vb,
	189	enum v4l2_field field)
	190	{
	191	struct cx23885_fh *fh = q->priv_data;
	192	struct cx23885_dev *dev = fh->dev;
	193	struct cx23885_buffer *buf = container_of(vb,
	194	struct cx23885_buffer, vb);
	195	struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
	196	unsigned int size;
	197	int rc;
	198
	199	size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
	200	if (0 != buf->vb.baddr && buf->vb.bsize < size)
	201	return -EINVAL;
	202
	203	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
	204	buf->vb.width = VBI_LINE_LENGTH;
	205	buf->vb.height = VBI_LINE_COUNT;
	206	buf->vb.size = size;
	207	buf->vb.field = V4L2_FIELD_SEQ_TB;
	208
	209	rc = videobuf_iolock(q, &buf->vb, NULL);
	210	if (0 != rc)
	211	goto fail;
	212	cx23885_risc_buffer(dev->pci, &buf->risc,
	213	dma->sglist,
	214	0, buf->vb.width * buf->vb.height,
	215	buf->vb.width, 0,
	216	buf->vb.height);
	217	}
218	buf->vb.state = VIDEOBUF_PREPARED;
219	return 0;
220
221	fail:
222	cx23885_free_buffer(q, buf);
223	return rc;
224	}
225
226	static void
227	vbi_queue(struct videobuf_queue vq, struct videobuf_buffer vb)
228	{
229	struct cx23885_buffer *buf =
230	container_of(vb, struct cx23885_buffer, vb);
231	struct cx23885_buffer *prev;
232	struct cx23885_fh *fh = vq->priv_data;
233	struct cx23885_dev *dev = fh->dev;
234	struct cx23885_dmaqueue *q = &dev->vbiq;
235
236	/* add jump to stopper */
237	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP \| RISC_IRQ1 \| RISC_CNT_INC);
238	buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
239	buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
240
241	if (list_empty(&q->active)) {
242	list_add_tail(&buf->vb.queue, &q->active);
243	cx23885_start_vbi_dma(dev, q, buf);
244	buf->vb.state = VIDEOBUF_ACTIVE;
245	buf->count = q->count++;
246	mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
247	dprintk(2, "[%p/%d] vbi_queue - first active\n",
248	buf, buf->vb.i);
249
250	} else {
251	prev = list_entry(q->active.prev, struct cx23885_buffer,
252	vb.queue);
253	list_add_tail(&buf->vb.queue, &q->active);
254	buf->vb.state = VIDEOBUF_ACTIVE;
255	buf->count = q->count++;
256	prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
257	prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63-32 */
258	dprintk(2, "[%p/%d] buffer_queue - append to active\n",
259	buf, buf->vb.i);
260	}
261	}
262
263	static void vbi_release(struct videobuf_queue q, struct videobuf_buffer vb)
264	{
265	struct cx23885_buffer *buf =
266	container_of(vb, struct cx23885_buffer, vb);
267
268	cx23885_free_buffer(q, buf);
269	}
270
271	struct videobuf_queue_ops cx23885_vbi_qops = {
272	.buf_setup = vbi_setup,
273	.buf_prepare = vbi_prepare,
274	.buf_queue = vbi_queue,
275	.buf_release = vbi_release,
276	};
277
278	/* ------------------------------------------------------------------ */
279	/*
280	* Local variables:
281	* c-basic-offset: 8
282	* End:
283	*/