diff options
Diffstat (limited to 'drivers/media/video/cx88/cx88-vbi.c')
-rw-r--r-- | drivers/media/video/cx88/cx88-vbi.c | 245 |
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 | |||
9 | static unsigned int vbibufs = 4; | ||
10 | module_param(vbibufs,int,0644); | ||
11 | MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32"); | ||
12 | |||
13 | static unsigned int vbi_debug; | ||
14 | module_param(vbi_debug,int,0644); | ||
15 | MODULE_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 | |||
22 | int 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 | |||
49 | static 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 | |||
81 | int 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 | |||
97 | int 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 | |||
115 | void 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 | |||
143 | static int | ||
144 | vbi_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 | |||
156 | static int | ||
157 | vbi_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 | |||
193 | static void | ||
194 | vbi_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 | |||
226 | static 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 | |||
233 | const 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 | */ | ||