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
cx8800_vbi_fmt(struct file * file,void * priv,struct v4l2_format * f)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
cx8800_start_vbi_dma(struct cx8800_dev * dev,struct cx88_dmaqueue * q,struct cx88_buffer * buf)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
cx8800_stop_vbi_dma(struct cx8800_dev * dev)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
cx8800_restart_vbi_queue(struct cx8800_dev * dev,struct cx88_dmaqueue * q)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
cx8800_vbi_timeout(unsigned long data)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
vbi_setup(struct videobuf_queue * q,unsigned int * count,unsigned int * size)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
vbi_prepare(struct videobuf_queue * q,struct videobuf_buffer * vb,enum v4l2_field field)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
vbi_queue(struct videobuf_queue * vq,struct videobuf_buffer * vb)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
vbi_release(struct videobuf_queue * q,struct videobuf_buffer * vb)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 */
247