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path: root/drivers/media/video/cx88/cx88-vbi.c
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Diffstat (limited to 'drivers/media/video/cx88/cx88-vbi.c')
-rw-r--r--drivers/media/video/cx88/cx88-vbi.c245
1 files changed, 245 insertions, 0 deletions
diff --git a/drivers/media/video/cx88/cx88-vbi.c b/drivers/media/video/cx88/cx88-vbi.c
new file mode 100644
index 00000000000..f8f8389c036
--- /dev/null
+++ b/drivers/media/video/cx88/cx88-vbi.c
@@ -0,0 +1,245 @@
1/*
2 */
3#include <linux/kernel.h>
4#include <linux/module.h>
5#include <linux/init.h>
6
7#include "cx88.h"
8
9static unsigned int vbibufs = 4;
10module_param(vbibufs,int,0644);
11MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32");
12
13static unsigned int vbi_debug;
14module_param(vbi_debug,int,0644);
15MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]");
16
17#define dprintk(level,fmt, arg...) if (vbi_debug >= level) \
18 printk(KERN_DEBUG "%s: " fmt, dev->core->name , ## arg)
19
20/* ------------------------------------------------------------------ */
21
22int cx8800_vbi_fmt (struct file *file, void *priv,
23 struct v4l2_format *f)
24{
25 struct cx8800_fh *fh = priv;
26 struct cx8800_dev *dev = fh->dev;
27
28 f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
29 f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
30 f->fmt.vbi.offset = 244;
31 f->fmt.vbi.count[0] = VBI_LINE_COUNT;
32 f->fmt.vbi.count[1] = VBI_LINE_COUNT;
33
34 if (dev->core->tvnorm & V4L2_STD_525_60) {
35 /* ntsc */
36 f->fmt.vbi.sampling_rate = 28636363;
37 f->fmt.vbi.start[0] = 10;
38 f->fmt.vbi.start[1] = 273;
39
40 } else if (dev->core->tvnorm & V4L2_STD_625_50) {
41 /* pal */
42 f->fmt.vbi.sampling_rate = 35468950;
43 f->fmt.vbi.start[0] = 7 -1;
44 f->fmt.vbi.start[1] = 319 -1;
45 }
46 return 0;
47}
48
49static int cx8800_start_vbi_dma(struct cx8800_dev *dev,
50 struct cx88_dmaqueue *q,
51 struct cx88_buffer *buf)
52{
53 struct cx88_core *core = dev->core;
54
55 /* setup fifo + format */
56 cx88_sram_channel_setup(dev->core, &cx88_sram_channels[SRAM_CH24],
57 buf->vb.width, buf->risc.dma);
58
59 cx_write(MO_VBOS_CONTROL, ( (1 << 18) | // comb filter delay fixup
60 (1 << 15) | // enable vbi capture
61 (1 << 11) ));
62
63 /* reset counter */
64 cx_write(MO_VBI_GPCNTRL, GP_COUNT_CONTROL_RESET);
65 q->count = 1;
66
67 /* enable irqs */
68 cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_VIDINT);
69 cx_set(MO_VID_INTMSK, 0x0f0088);
70
71 /* enable capture */
72 cx_set(VID_CAPTURE_CONTROL,0x18);
73
74 /* start dma */
75 cx_set(MO_DEV_CNTRL2, (1<<5));
76 cx_set(MO_VID_DMACNTRL, 0x88);
77
78 return 0;
79}
80
81int cx8800_stop_vbi_dma(struct cx8800_dev *dev)
82{
83 struct cx88_core *core = dev->core;
84
85 /* stop dma */
86 cx_clear(MO_VID_DMACNTRL, 0x88);
87
88 /* disable capture */
89 cx_clear(VID_CAPTURE_CONTROL,0x18);
90
91 /* disable irqs */
92 cx_clear(MO_PCI_INTMSK, PCI_INT_VIDINT);
93 cx_clear(MO_VID_INTMSK, 0x0f0088);
94 return 0;
95}
96
97int cx8800_restart_vbi_queue(struct cx8800_dev *dev,
98 struct cx88_dmaqueue *q)
99{
100 struct cx88_buffer *buf;
101
102 if (list_empty(&q->active))
103 return 0;
104
105 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
106 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
107 buf, buf->vb.i);
108 cx8800_start_vbi_dma(dev, q, buf);
109 list_for_each_entry(buf, &q->active, vb.queue)
110 buf->count = q->count++;
111 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
112 return 0;
113}
114
115void cx8800_vbi_timeout(unsigned long data)
116{
117 struct cx8800_dev *dev = (struct cx8800_dev*)data;
118 struct cx88_core *core = dev->core;
119 struct cx88_dmaqueue *q = &dev->vbiq;
120 struct cx88_buffer *buf;
121 unsigned long flags;
122
123 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH24]);
124
125 cx_clear(MO_VID_DMACNTRL, 0x88);
126 cx_clear(VID_CAPTURE_CONTROL, 0x18);
127
128 spin_lock_irqsave(&dev->slock,flags);
129 while (!list_empty(&q->active)) {
130 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
131 list_del(&buf->vb.queue);
132 buf->vb.state = VIDEOBUF_ERROR;
133 wake_up(&buf->vb.done);
134 printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->core->name,
135 buf, buf->vb.i, (unsigned long)buf->risc.dma);
136 }
137 cx8800_restart_vbi_queue(dev,q);
138 spin_unlock_irqrestore(&dev->slock,flags);
139}
140
141/* ------------------------------------------------------------------ */
142
143static int
144vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
145{
146 *size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
147 if (0 == *count)
148 *count = vbibufs;
149 if (*count < 2)
150 *count = 2;
151 if (*count > 32)
152 *count = 32;
153 return 0;
154}
155
156static int
157vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
158 enum v4l2_field field)
159{
160 struct cx8800_fh *fh = q->priv_data;
161 struct cx8800_dev *dev = fh->dev;
162 struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
163 unsigned int size;
164 int rc;
165
166 size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
167 if (0 != buf->vb.baddr && buf->vb.bsize < size)
168 return -EINVAL;
169
170 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
171 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
172 buf->vb.width = VBI_LINE_LENGTH;
173 buf->vb.height = VBI_LINE_COUNT;
174 buf->vb.size = size;
175 buf->vb.field = V4L2_FIELD_SEQ_TB;
176
177 if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
178 goto fail;
179 cx88_risc_buffer(dev->pci, &buf->risc,
180 dma->sglist,
181 0, buf->vb.width * buf->vb.height,
182 buf->vb.width, 0,
183 buf->vb.height);
184 }
185 buf->vb.state = VIDEOBUF_PREPARED;
186 return 0;
187
188 fail:
189 cx88_free_buffer(q,buf);
190 return rc;
191}
192
193static void
194vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
195{
196 struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
197 struct cx88_buffer *prev;
198 struct cx8800_fh *fh = vq->priv_data;
199 struct cx8800_dev *dev = fh->dev;
200 struct cx88_dmaqueue *q = &dev->vbiq;
201
202 /* add jump to stopper */
203 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
204 buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
205
206 if (list_empty(&q->active)) {
207 list_add_tail(&buf->vb.queue,&q->active);
208 cx8800_start_vbi_dma(dev, q, buf);
209 buf->vb.state = VIDEOBUF_ACTIVE;
210 buf->count = q->count++;
211 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
212 dprintk(2,"[%p/%d] vbi_queue - first active\n",
213 buf, buf->vb.i);
214
215 } else {
216 prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue);
217 list_add_tail(&buf->vb.queue,&q->active);
218 buf->vb.state = VIDEOBUF_ACTIVE;
219 buf->count = q->count++;
220 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
221 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
222 buf, buf->vb.i);
223 }
224}
225
226static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
227{
228 struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
229
230 cx88_free_buffer(q,buf);
231}
232
233const struct videobuf_queue_ops cx8800_vbi_qops = {
234 .buf_setup = vbi_setup,
235 .buf_prepare = vbi_prepare,
236 .buf_queue = vbi_queue,
237 .buf_release = vbi_release,
238};
239
240/* ------------------------------------------------------------------ */
241/*
242 * Local variables:
243 * c-basic-offset: 8
244 * End:
245 */
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-18 00:48:17 -0400