Merge branch 'for-2.6.30' into for-2.6.31
[linux-2.6] / drivers / media / video / cx88 / cx88-vbi.c
1 /*
2  */
3 #include <linux/kernel.h>
4 #include <linux/module.h>
5 #include <linux/init.h>
6 #include <linux/slab.h>
7
8 #include "cx88.h"
9
10 static unsigned int vbibufs = 4;
11 module_param(vbibufs,int,0644);
12 MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32");
13
14 static unsigned int vbi_debug;
15 module_param(vbi_debug,int,0644);
16 MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]");
17
18 #define dprintk(level,fmt, arg...)      if (vbi_debug >= level) \
19         printk(KERN_DEBUG "%s: " fmt, dev->core->name , ## arg)
20
21 /* ------------------------------------------------------------------ */
22
23 int cx8800_vbi_fmt (struct file *file, void *priv,
24                                         struct v4l2_format *f)
25 {
26         struct cx8800_fh  *fh   = priv;
27         struct cx8800_dev *dev  = fh->dev;
28
29         f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
30         f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
31         f->fmt.vbi.offset = 244;
32         f->fmt.vbi.count[0] = VBI_LINE_COUNT;
33         f->fmt.vbi.count[1] = VBI_LINE_COUNT;
34
35         if (dev->core->tvnorm & V4L2_STD_525_60) {
36                 /* ntsc */
37                 f->fmt.vbi.sampling_rate = 28636363;
38                 f->fmt.vbi.start[0] = 10;
39                 f->fmt.vbi.start[1] = 273;
40
41         } else if (dev->core->tvnorm & V4L2_STD_625_50) {
42                 /* pal */
43                 f->fmt.vbi.sampling_rate = 35468950;
44                 f->fmt.vbi.start[0] = 7 -1;
45                 f->fmt.vbi.start[1] = 319 -1;
46         }
47         return 0;
48 }
49
50 static int cx8800_start_vbi_dma(struct cx8800_dev    *dev,
51                          struct cx88_dmaqueue *q,
52                          struct cx88_buffer   *buf)
53 {
54         struct cx88_core *core = dev->core;
55
56         /* setup fifo + format */
57         cx88_sram_channel_setup(dev->core, &cx88_sram_channels[SRAM_CH24],
58                                 buf->vb.width, buf->risc.dma);
59
60         cx_write(MO_VBOS_CONTROL, ( (1 << 18) |  // comb filter delay fixup
61                                     (1 << 15) |  // enable vbi capture
62                                     (1 << 11) ));
63
64         /* reset counter */
65         cx_write(MO_VBI_GPCNTRL, GP_COUNT_CONTROL_RESET);
66         q->count = 1;
67
68         /* enable irqs */
69         cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_VIDINT);
70         cx_set(MO_VID_INTMSK, 0x0f0088);
71
72         /* enable capture */
73         cx_set(VID_CAPTURE_CONTROL,0x18);
74
75         /* start dma */
76         cx_set(MO_DEV_CNTRL2, (1<<5));
77         cx_set(MO_VID_DMACNTRL, 0x88);
78
79         return 0;
80 }
81
82 int cx8800_stop_vbi_dma(struct cx8800_dev *dev)
83 {
84         struct cx88_core *core = dev->core;
85
86         /* stop dma */
87         cx_clear(MO_VID_DMACNTRL, 0x88);
88
89         /* disable capture */
90         cx_clear(VID_CAPTURE_CONTROL,0x18);
91
92         /* disable irqs */
93         cx_clear(MO_PCI_INTMSK, PCI_INT_VIDINT);
94         cx_clear(MO_VID_INTMSK, 0x0f0088);
95         return 0;
96 }
97
98 int cx8800_restart_vbi_queue(struct cx8800_dev    *dev,
99                              struct cx88_dmaqueue *q)
100 {
101         struct cx88_buffer *buf;
102
103         if (list_empty(&q->active))
104                 return 0;
105
106         buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
107         dprintk(2,"restart_queue [%p/%d]: restart dma\n",
108                 buf, buf->vb.i);
109         cx8800_start_vbi_dma(dev, q, buf);
110         list_for_each_entry(buf, &q->active, vb.queue)
111                 buf->count = q->count++;
112         mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
113         return 0;
114 }
115
116 void cx8800_vbi_timeout(unsigned long data)
117 {
118         struct cx8800_dev *dev = (struct cx8800_dev*)data;
119         struct cx88_core *core = dev->core;
120         struct cx88_dmaqueue *q = &dev->vbiq;
121         struct cx88_buffer *buf;
122         unsigned long flags;
123
124         cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH24]);
125
126         cx_clear(MO_VID_DMACNTRL, 0x88);
127         cx_clear(VID_CAPTURE_CONTROL, 0x18);
128
129         spin_lock_irqsave(&dev->slock,flags);
130         while (!list_empty(&q->active)) {
131                 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
132                 list_del(&buf->vb.queue);
133                 buf->vb.state = VIDEOBUF_ERROR;
134                 wake_up(&buf->vb.done);
135                 printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->core->name,
136                        buf, buf->vb.i, (unsigned long)buf->risc.dma);
137         }
138         cx8800_restart_vbi_queue(dev,q);
139         spin_unlock_irqrestore(&dev->slock,flags);
140 }
141
142 /* ------------------------------------------------------------------ */
143
144 static int
145 vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
146 {
147         *size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
148         if (0 == *count)
149                 *count = vbibufs;
150         if (*count < 2)
151                 *count = 2;
152         if (*count > 32)
153                 *count = 32;
154         return 0;
155 }
156
157 static int
158 vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
159             enum v4l2_field field)
160 {
161         struct cx8800_fh   *fh  = q->priv_data;
162         struct cx8800_dev  *dev = fh->dev;
163         struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
164         unsigned int size;
165         int rc;
166
167         size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
168         if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
169                 return -EINVAL;
170
171         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
172                 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
173                 buf->vb.width  = VBI_LINE_LENGTH;
174                 buf->vb.height = VBI_LINE_COUNT;
175                 buf->vb.size   = size;
176                 buf->vb.field  = V4L2_FIELD_SEQ_TB;
177
178                 if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
179                         goto fail;
180                 cx88_risc_buffer(dev->pci, &buf->risc,
181                                  dma->sglist,
182                                  0, buf->vb.width * buf->vb.height,
183                                  buf->vb.width, 0,
184                                  buf->vb.height);
185         }
186         buf->vb.state = VIDEOBUF_PREPARED;
187         return 0;
188
189  fail:
190         cx88_free_buffer(q,buf);
191         return rc;
192 }
193
194 static void
195 vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
196 {
197         struct cx88_buffer    *buf = container_of(vb,struct cx88_buffer,vb);
198         struct cx88_buffer    *prev;
199         struct cx8800_fh      *fh   = vq->priv_data;
200         struct cx8800_dev     *dev  = fh->dev;
201         struct cx88_dmaqueue  *q    = &dev->vbiq;
202
203         /* add jump to stopper */
204         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
205         buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
206
207         if (list_empty(&q->active)) {
208                 list_add_tail(&buf->vb.queue,&q->active);
209                 cx8800_start_vbi_dma(dev, q, buf);
210                 buf->vb.state = VIDEOBUF_ACTIVE;
211                 buf->count    = q->count++;
212                 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
213                 dprintk(2,"[%p/%d] vbi_queue - first active\n",
214                         buf, buf->vb.i);
215
216         } else {
217                 prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue);
218                 list_add_tail(&buf->vb.queue,&q->active);
219                 buf->vb.state = VIDEOBUF_ACTIVE;
220                 buf->count    = q->count++;
221                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
222                 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
223                         buf, buf->vb.i);
224         }
225 }
226
227 static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
228 {
229         struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
230
231         cx88_free_buffer(q,buf);
232 }
233
234 struct videobuf_queue_ops cx8800_vbi_qops = {
235         .buf_setup    = vbi_setup,
236         .buf_prepare  = vbi_prepare,
237         .buf_queue    = vbi_queue,
238         .buf_release  = vbi_release,
239 };
240
241 /* ------------------------------------------------------------------ */
242 /*
243  * Local variables:
244  * c-basic-offset: 8
245  * End:
246  */