1/*
2 */
3#include <linux/kernel.h>
4#include <linux/module.h>
5#include <linux/moduleparam.h>
6#include <linux/init.h>
7#include <linux/slab.h>
8
9#include "cx88.h"
10
11static unsigned int vbibufs = 4;
12module_param(vbibufs,int,0644);
13MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32");
14
15static unsigned int vbi_debug = 0;
16module_param(vbi_debug,int,0644);
17MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]");
18
19#define dprintk(level,fmt, arg...)	if (vbi_debug >= level) \
20	printk(KERN_DEBUG "%s: " fmt, dev->core->name , ## arg)
21
22/* ------------------------------------------------------------------ */
23
24int cx8800_vbi_fmt (struct file *file, void *priv,
25					struct v4l2_format *f)
26{
27	struct cx8800_fh  *fh   = priv;
28	struct cx8800_dev *dev  = fh->dev;
29
30	f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
31	f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
32	f->fmt.vbi.offset = 244;
33	f->fmt.vbi.count[0] = VBI_LINE_COUNT;
34	f->fmt.vbi.count[1] = VBI_LINE_COUNT;
35
36	if (dev->core->tvnorm & V4L2_STD_525_60) {
37		/* ntsc */
38		f->fmt.vbi.sampling_rate = 28636363;
39		f->fmt.vbi.start[0] = 10;
40		f->fmt.vbi.start[1] = 273;
41
42	} else if (dev->core->tvnorm & V4L2_STD_625_50) {
43		/* pal */
44		f->fmt.vbi.sampling_rate = 35468950;
45		f->fmt.vbi.start[0] = 7 -1;
46		f->fmt.vbi.start[1] = 319 -1;
47	}
48	return 0;
49}
50
51static int cx8800_start_vbi_dma(struct cx8800_dev    *dev,
52			 struct cx88_dmaqueue *q,
53			 struct cx88_buffer   *buf)
54{
55	struct cx88_core *core = dev->core;
56
57	/* setup fifo + format */
58	cx88_sram_channel_setup(dev->core, &cx88_sram_channels[SRAM_CH24],
59				buf->vb.width, buf->risc.dma);
60
61	cx_write(MO_VBOS_CONTROL, ( (1 << 18) |  // comb filter delay fixup
62				    (1 << 15) |  // enable vbi capture
63				    (1 << 11) ));
64
65	/* reset counter */
66	cx_write(MO_VBI_GPCNTRL, GP_COUNT_CONTROL_RESET);
67	q->count = 1;
68
69	/* enable irqs */
70	cx_set(MO_PCI_INTMSK, core->pci_irqmask | 0x01);
71	cx_set(MO_VID_INTMSK, 0x0f0088);
72
73	/* enable capture */
74	cx_set(VID_CAPTURE_CONTROL,0x18);
75
76	/* start dma */
77	cx_set(MO_DEV_CNTRL2, (1<<5));
78	cx_set(MO_VID_DMACNTRL, 0x88);
79
80	return 0;
81}
82
83int cx8800_stop_vbi_dma(struct cx8800_dev *dev)
84{
85	struct cx88_core *core = dev->core;
86
87	/* stop dma */
88	cx_clear(MO_VID_DMACNTRL, 0x88);
89
90	/* disable capture */
91	cx_clear(VID_CAPTURE_CONTROL,0x18);
92
93	/* disable irqs */
94	cx_clear(MO_PCI_INTMSK, 0x000001);
95	cx_clear(MO_VID_INTMSK, 0x0f0088);
96	return 0;
97}
98
99int cx8800_restart_vbi_queue(struct cx8800_dev    *dev,
100			     struct cx88_dmaqueue *q)
101{
102	struct cx88_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 cx88_buffer, vb.queue);
109	dprintk(2,"restart_queue [%p/%d]: restart dma\n",
110		buf, buf->vb.i);
111	cx8800_start_vbi_dma(dev, q, buf);
112	list_for_each(item,&q->active) {
113		buf = list_entry(item, struct cx88_buffer, vb.queue);
114		buf->count = q->count++;
115	}
116	mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
117	return 0;
118}
119
120void cx8800_vbi_timeout(unsigned long data)
121{
122	struct cx8800_dev *dev = (struct cx8800_dev*)data;
123	struct cx88_core *core = dev->core;
124	struct cx88_dmaqueue *q = &dev->vbiq;
125	struct cx88_buffer *buf;
126	unsigned long flags;
127
128	cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH24]);
129
130	cx_clear(MO_VID_DMACNTRL, 0x88);
131	cx_clear(VID_CAPTURE_CONTROL, 0x18);
132
133	spin_lock_irqsave(&dev->slock,flags);
134	while (!list_empty(&q->active)) {
135		buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
136		list_del(&buf->vb.queue);
137		buf->vb.state = STATE_ERROR;
138		wake_up(&buf->vb.done);
139		printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->core->name,
140		       buf, buf->vb.i, (unsigned long)buf->risc.dma);
141	}
142	cx8800_restart_vbi_queue(dev,q);
143	spin_unlock_irqrestore(&dev->slock,flags);
144}
145
146/* ------------------------------------------------------------------ */
147
148static int
149vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
150{
151	*size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
152	if (0 == *count)
153		*count = vbibufs;
154	if (*count < 2)
155		*count = 2;
156	if (*count > 32)
157		*count = 32;
158	return 0;
159}
160
161static int
162vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
163	    enum v4l2_field field)
164{
165	struct cx8800_fh   *fh  = q->priv_data;
166	struct cx8800_dev  *dev = fh->dev;
167	struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
168	unsigned int size;
169	int rc;
170
171	size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
172	if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
173		return -EINVAL;
174
175	if (STATE_NEEDS_INIT == buf->vb.state) {
176		buf->vb.width  = VBI_LINE_LENGTH;
177		buf->vb.height = VBI_LINE_COUNT;
178		buf->vb.size   = size;
179		buf->vb.field  = V4L2_FIELD_SEQ_TB;
180
181		if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
182			goto fail;
183		cx88_risc_buffer(dev->pci, &buf->risc,
184				 buf->vb.dma.sglist,
185				 0, buf->vb.width * buf->vb.height,
186				 buf->vb.width, 0,
187				 buf->vb.height);
188	}
189	buf->vb.state = STATE_PREPARED;
190	return 0;
191
192 fail:
193	cx88_free_buffer(q,buf);
194	return rc;
195}
196
197static void
198vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
199{
200	struct cx88_buffer    *buf = container_of(vb,struct cx88_buffer,vb);
201	struct cx88_buffer    *prev;
202	struct cx8800_fh      *fh   = vq->priv_data;
203	struct cx8800_dev     *dev  = fh->dev;
204	struct cx88_dmaqueue  *q    = &dev->vbiq;
205
206	/* add jump to stopper */
207	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
208	buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
209
210	if (list_empty(&q->active)) {
211		list_add_tail(&buf->vb.queue,&q->active);
212		cx8800_start_vbi_dma(dev, q, buf);
213		buf->vb.state = STATE_ACTIVE;
214		buf->count    = q->count++;
215		mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
216		dprintk(2,"[%p/%d] vbi_queue - first active\n",
217			buf, buf->vb.i);
218
219	} else {
220		prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue);
221		list_add_tail(&buf->vb.queue,&q->active);
222		buf->vb.state = STATE_ACTIVE;
223		buf->count    = q->count++;
224		prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
225		dprintk(2,"[%p/%d] buffer_queue - append to active\n",
226			buf, buf->vb.i);
227	}
228}
229
230static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
231{
232	struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
233
234	cx88_free_buffer(q,buf);
235}
236
237struct videobuf_queue_ops cx8800_vbi_qops = {
238	.buf_setup    = vbi_setup,
239	.buf_prepare  = vbi_prepare,
240	.buf_queue    = vbi_queue,
241	.buf_release  = vbi_release,
242};
243
244/* ------------------------------------------------------------------ */
245/*
246 * Local variables:
247 * c-basic-offset: 8
248 * End:
249 */
250