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

/*
 *  Driver for the Conexant CX23885 PCIe bridge
 *
 *  Copyright (c) 2007 Steven Toth <stoth@hauppauge.com>
 *
 *  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 <linux/slab.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;
}

static int cx23885_start_vbi_dma(struct cx23885_dev    *dev,
			 struct cx23885_dmaqueue *q,
			 struct cx23885_buffer   *buf)
{
	/* setup fifo + format */
	cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02],
				buf->vb.width, buf->risc.dma);

	/* reset counter */
	q->count = 1;

	/* enable irqs */
	cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | 0x01);
	cx_set(VID_A_INT_MSK, 0x000022);

	/* start dma */
	cx_set(DEV_CNTRL2, (1<<5));
	cx_set(VID_A_DMA_CTL, 0x00000022);

	return 0;
}

int cx23885_stop_vbi_dma(struct cx23885_dev *dev)
{
	/* stop dma */
	cx_clear(VID_A_DMA_CTL, 0x00000022);

	/* disable irqs */
	cx_clear(PCI_INT_MSK, 0x000001);
	cx_clear(VID_A_INT_MSK, 0x00000022);
	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]);

	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	*
	4	* Copyright (c) 2007 Steven Toth <stoth@hauppauge.com>
	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>
	26	#include <linux/slab.h>
	27
	28	#include "cx23885.h"
	29
	30	static unsigned int vbibufs = 4;
	31	module_param(vbibufs, int, 0644);
	32	MODULE_PARM_DESC(vbibufs, "number of vbi buffers, range 2-32");
	33
4513fc69	34	static unsigned int vbi_debug;
e47f30b1 ST	35	module_param(vbi_debug, int, 0644);
	36	MODULE_PARM_DESC(vbi_debug, "enable debug messages [vbi]");
	37
4513fc69 ST	38	#define dprintk(level, fmt, arg...)\
	39	do { if (vbi_debug >= level)\
	40	printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\
	41	} while (0)
e47f30b1 ST	42
	43	/* ------------------------------------------------------------------ */
	44
	45	int cx23885_vbi_fmt(struct file file, void priv,
	46	struct v4l2_format *f)
	47	{
	48	struct cx23885_fh *fh = priv;
	49	struct cx23885_dev *dev = fh->dev;
	50
	51	if (dev->tvnorm & V4L2_STD_525_60) {
	52	/* ntsc */
	53	f->fmt.vbi.sampling_rate = 28636363;
	54	f->fmt.vbi.start[0] = 10;
	55	f->fmt.vbi.start[1] = 273;
	56
	57	} else if (dev->tvnorm & V4L2_STD_625_50) {
	58	/* pal */
	59	f->fmt.vbi.sampling_rate = 35468950;
	60	f->fmt.vbi.start[0] = 7 - 1;
	61	f->fmt.vbi.start[1] = 319 - 1;
	62	}
	63	return 0;
	64	}
	65
	66	static int cx23885_start_vbi_dma(struct cx23885_dev *dev,
	67	struct cx23885_dmaqueue *q,
	68	struct cx23885_buffer *buf)
	69	{
	70	/* setup fifo + format */
	71	cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02],
	72	buf->vb.width, buf->risc.dma);
	73
	74	/* reset counter */
	75	q->count = 1;
	76
	77	/* enable irqs */
	78	cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) \| 0x01);
	79	cx_set(VID_A_INT_MSK, 0x000022);
	80
	81	/* start dma */
	82	cx_set(DEV_CNTRL2, (1<<5));
	83	cx_set(VID_A_DMA_CTL, 0x00000022);
	84
	85	return 0;
	86	}
	87
	88	int cx23885_stop_vbi_dma(struct cx23885_dev *dev)
	89	{
	90	/* stop dma */
	91	cx_clear(VID_A_DMA_CTL, 0x00000022);
	92
	93	/* disable irqs */
	94	cx_clear(PCI_INT_MSK, 0x000001);
	95	cx_clear(VID_A_INT_MSK, 0x00000022);
	96	return 0;
	97	}
	98
	99	int cx23885_restart_vbi_queue(struct cx23885_dev *dev,
	100	struct cx23885_dmaqueue *q)
	101	{
	102	struct cx23885_buffer *buf;
	103	struct list_head *item;
	104
	105	if (list_empty(&q->active))
106	return 0;
107
108	buf = list_entry(q->active.next, struct cx23885_buffer, vb.queue);
109	dprintk(2, "restart_queue [%p/%d]: restart dma\n",
110	buf, buf->vb.i);
111	cx23885_start_vbi_dma(dev, q, buf);
112	list_for_each(item, &q->active) {
113	buf = list_entry(item, struct cx23885_buffer, vb.queue);
114	buf->count = q->count++;
115	}
116	mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
117	return 0;
118	}
119
120	void cx23885_vbi_timeout(unsigned long data)
121	{
122	struct cx23885_dev dev = (struct cx23885_dev )data;
123	struct cx23885_dmaqueue *q = &dev->vbiq;
124	struct cx23885_buffer *buf;
125	unsigned long flags;
126
127	cx23885_sram_channel_dump(dev, &dev->sram_channels[SRAM_CH02]);
128
129	cx_clear(VID_A_DMA_CTL, 0x22);
130
131	spin_lock_irqsave(&dev->slock, flags);
132	while (!list_empty(&q->active)) {
133	buf = list_entry(q->active.next, struct cx23885_buffer,
134	vb.queue);
135	list_del(&buf->vb.queue);
136	buf->vb.state = VIDEOBUF_ERROR;
137	wake_up(&buf->vb.done);
138	printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->name,
139	buf, buf->vb.i, (unsigned long)buf->risc.dma);
140	}
141	cx23885_restart_vbi_queue(dev, q);
142	spin_unlock_irqrestore(&dev->slock, flags);
143	}
144
145	/* ------------------------------------------------------------------ */
146	#define VBI_LINE_LENGTH 2048
147	#define VBI_LINE_COUNT 17
148
149	static int
150	vbi_setup(struct videobuf_queue q, unsigned int count, unsigned int *size)
151	{
152	size = VBI_LINE_COUNT VBI_LINE_LENGTH * 2;
153	if (0 == *count)
154	*count = vbibufs;
155	if (*count < 2)
156	*count = 2;
157	if (*count > 32)
158	*count = 32;
159	return 0;
160	}
161
162	static int
163	vbi_prepare(struct videobuf_queue q, struct videobuf_buffer vb,
164	enum v4l2_field field)
165	{
166	struct cx23885_fh *fh = q->priv_data;
167	struct cx23885_dev *dev = fh->dev;
168	struct cx23885_buffer *buf = container_of(vb,
169	struct cx23885_buffer, vb);
170	struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
171	unsigned int size;
172	int rc;
173
174	size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
175	if (0 != buf->vb.baddr && buf->vb.bsize < size)
176	return -EINVAL;
177
178	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
179	buf->vb.width = VBI_LINE_LENGTH;
180	buf->vb.height = VBI_LINE_COUNT;
181	buf->vb.size = size;
182	buf->vb.field = V4L2_FIELD_SEQ_TB;
183
184	rc = videobuf_iolock(q, &buf->vb, NULL);
185	if (0 != rc)
186	goto fail;
187	cx23885_risc_buffer(dev->pci, &buf->risc,
188	dma->sglist,
189	0, buf->vb.width * buf->vb.height,
190	buf->vb.width, 0,
191	buf->vb.height);
192	}
193	buf->vb.state = VIDEOBUF_PREPARED;
194	return 0;
195
196	fail:
197	cx23885_free_buffer(q, buf);
198	return rc;
199	}
200
201	static void
202	vbi_queue(struct videobuf_queue vq, struct videobuf_buffer vb)
203	{
204	struct cx23885_buffer *buf =
205	container_of(vb, struct cx23885_buffer, vb);
206	struct cx23885_buffer *prev;
207	struct cx23885_fh *fh = vq->priv_data;
208	struct cx23885_dev *dev = fh->dev;
209	struct cx23885_dmaqueue *q = &dev->vbiq;
210
211	/* add jump to stopper */
212	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP \| RISC_IRQ1 \| RISC_CNT_INC);
213	buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
214	buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
215
216	if (list_empty(&q->active)) {
217	list_add_tail(&buf->vb.queue, &q->active);
218	cx23885_start_vbi_dma(dev, q, buf);
219	buf->vb.state = VIDEOBUF_ACTIVE;
220	buf->count = q->count++;
221	mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
222	dprintk(2, "[%p/%d] vbi_queue - first active\n",
223	buf, buf->vb.i);
224
225	} else {
226	prev = list_entry(q->active.prev, struct cx23885_buffer,
227	vb.queue);
228	list_add_tail(&buf->vb.queue, &q->active);
229	buf->vb.state = VIDEOBUF_ACTIVE;
230	buf->count = q->count++;
231	prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
232	prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63-32 */
233	dprintk(2, "[%p/%d] buffer_queue - append to active\n",
234	buf, buf->vb.i);
235	}
236	}
237
238	static void vbi_release(struct videobuf_queue q, struct videobuf_buffer vb)
239	{
240	struct cx23885_buffer *buf =
241	container_of(vb, struct cx23885_buffer, vb);
242
243	cx23885_free_buffer(q, buf);
244	}
245
246	struct videobuf_queue_ops cx23885_vbi_qops = {
247	.buf_setup = vbi_setup,
248	.buf_prepare = vbi_prepare,
249	.buf_queue = vbi_queue,
250	.buf_release = vbi_release,
251	};
252
253	/* ------------------------------------------------------------------ */
254	/*
255	* Local variables:
256	* c-basic-offset: 8
257	* End:
258	*/