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23#include <linux/init.h>
24#include <linux/list.h>
25#include <linux/module.h>
26#include <linux/kernel.h>
27#include <linux/slab.h>
28
29#include "saa7134-reg.h"
30#include "saa7134.h"
31
32
33
34static unsigned int vbi_debug;
35module_param(vbi_debug, int, 0644);
36MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]");
37
38static unsigned int vbibufs = 4;
39module_param(vbibufs, int, 0444);
40MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32");
41
42#define dprintk(fmt, arg...) if (vbi_debug) \
43 printk(KERN_DEBUG "%s/vbi: " fmt, dev->name , ## arg)
44
45
46
47#define VBI_LINE_COUNT 16
48#define VBI_LINE_LENGTH 2048
49#define VBI_SCALE 0x200
50
51static void task_init(struct saa7134_dev *dev, struct saa7134_buf *buf,
52 int task)
53{
54 struct saa7134_tvnorm *norm = dev->tvnorm;
55
56
57 saa_writeb(SAA7134_VBI_H_START1(task), norm->h_start & 0xff);
58 saa_writeb(SAA7134_VBI_H_START2(task), norm->h_start >> 8);
59 saa_writeb(SAA7134_VBI_H_STOP1(task), norm->h_stop & 0xff);
60 saa_writeb(SAA7134_VBI_H_STOP2(task), norm->h_stop >> 8);
61 saa_writeb(SAA7134_VBI_V_START1(task), norm->vbi_v_start_0 & 0xff);
62 saa_writeb(SAA7134_VBI_V_START2(task), norm->vbi_v_start_0 >> 8);
63 saa_writeb(SAA7134_VBI_V_STOP1(task), norm->vbi_v_stop_0 & 0xff);
64 saa_writeb(SAA7134_VBI_V_STOP2(task), norm->vbi_v_stop_0 >> 8);
65
66 saa_writeb(SAA7134_VBI_H_SCALE_INC1(task), VBI_SCALE & 0xff);
67 saa_writeb(SAA7134_VBI_H_SCALE_INC2(task), VBI_SCALE >> 8);
68 saa_writeb(SAA7134_VBI_PHASE_OFFSET_LUMA(task), 0x00);
69 saa_writeb(SAA7134_VBI_PHASE_OFFSET_CHROMA(task), 0x00);
70
71 saa_writeb(SAA7134_VBI_H_LEN1(task), buf->vb.width & 0xff);
72 saa_writeb(SAA7134_VBI_H_LEN2(task), buf->vb.width >> 8);
73 saa_writeb(SAA7134_VBI_V_LEN1(task), buf->vb.height & 0xff);
74 saa_writeb(SAA7134_VBI_V_LEN2(task), buf->vb.height >> 8);
75
76 saa_andorb(SAA7134_DATA_PATH(task), 0xc0, 0x00);
77}
78
79
80
81static int buffer_activate(struct saa7134_dev *dev,
82 struct saa7134_buf *buf,
83 struct saa7134_buf *next)
84{
85 unsigned long control,base;
86
87 dprintk("buffer_activate [%p]\n",buf);
88 buf->vb.state = VIDEOBUF_ACTIVE;
89 buf->top_seen = 0;
90
91 task_init(dev,buf,TASK_A);
92 task_init(dev,buf,TASK_B);
93 saa_writeb(SAA7134_OFMT_DATA_A, 0x06);
94 saa_writeb(SAA7134_OFMT_DATA_B, 0x06);
95
96
97 base = saa7134_buffer_base(buf);
98 control = SAA7134_RS_CONTROL_BURST_16 |
99 SAA7134_RS_CONTROL_ME |
100 (buf->pt->dma >> 12);
101 saa_writel(SAA7134_RS_BA1(2),base);
102 saa_writel(SAA7134_RS_BA2(2),base + buf->vb.size/2);
103 saa_writel(SAA7134_RS_PITCH(2),buf->vb.width);
104 saa_writel(SAA7134_RS_CONTROL(2),control);
105 saa_writel(SAA7134_RS_BA1(3),base);
106 saa_writel(SAA7134_RS_BA2(3),base + buf->vb.size/2);
107 saa_writel(SAA7134_RS_PITCH(3),buf->vb.width);
108 saa_writel(SAA7134_RS_CONTROL(3),control);
109
110
111 saa7134_set_dmabits(dev);
112 mod_timer(&dev->vbi_q.timeout, jiffies+BUFFER_TIMEOUT);
113
114 return 0;
115}
116
117static int buffer_prepare(struct videobuf_queue *q,
118 struct videobuf_buffer *vb,
119 enum v4l2_field field)
120{
121 struct saa7134_fh *fh = q->priv_data;
122 struct saa7134_dev *dev = fh->dev;
123 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
124 struct saa7134_tvnorm *norm = dev->tvnorm;
125 unsigned int lines, llength, size;
126 int err;
127
128 lines = norm->vbi_v_stop_0 - norm->vbi_v_start_0 +1;
129 if (lines > VBI_LINE_COUNT)
130 lines = VBI_LINE_COUNT;
131 llength = VBI_LINE_LENGTH;
132 size = lines * llength * 2;
133 if (0 != buf->vb.baddr && buf->vb.bsize < size)
134 return -EINVAL;
135
136 if (buf->vb.size != size)
137 saa7134_dma_free(q,buf);
138
139 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
140 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
141
142 buf->vb.width = llength;
143 buf->vb.height = lines;
144 buf->vb.size = size;
145 buf->pt = &fh->pt_vbi;
146
147 err = videobuf_iolock(q,&buf->vb,NULL);
148 if (err)
149 goto oops;
150 err = saa7134_pgtable_build(dev->pci,buf->pt,
151 dma->sglist,
152 dma->sglen,
153 saa7134_buffer_startpage(buf));
154 if (err)
155 goto oops;
156 }
157 buf->vb.state = VIDEOBUF_PREPARED;
158 buf->activate = buffer_activate;
159 buf->vb.field = field;
160 return 0;
161
162 oops:
163 saa7134_dma_free(q,buf);
164 return err;
165}
166
167static int
168buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
169{
170 struct saa7134_fh *fh = q->priv_data;
171 struct saa7134_dev *dev = fh->dev;
172 int llength,lines;
173
174 lines = dev->tvnorm->vbi_v_stop_0 - dev->tvnorm->vbi_v_start_0 +1;
175 llength = VBI_LINE_LENGTH;
176 *size = lines * llength * 2;
177 if (0 == *count)
178 *count = vbibufs;
179 *count = saa7134_buffer_count(*size,*count);
180 return 0;
181}
182
183static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
184{
185 struct saa7134_fh *fh = q->priv_data;
186 struct saa7134_dev *dev = fh->dev;
187 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
188
189 saa7134_buffer_queue(dev,&dev->vbi_q,buf);
190}
191
192static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
193{
194 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
195
196 saa7134_dma_free(q,buf);
197}
198
199struct videobuf_queue_ops saa7134_vbi_qops = {
200 .buf_setup = buffer_setup,
201 .buf_prepare = buffer_prepare,
202 .buf_queue = buffer_queue,
203 .buf_release = buffer_release,
204};
205
206
207
208int saa7134_vbi_init1(struct saa7134_dev *dev)
209{
210 INIT_LIST_HEAD(&dev->vbi_q.queue);
211 init_timer(&dev->vbi_q.timeout);
212 dev->vbi_q.timeout.function = saa7134_buffer_timeout;
213 dev->vbi_q.timeout.data = (unsigned long)(&dev->vbi_q);
214 dev->vbi_q.dev = dev;
215
216 if (vbibufs < 2)
217 vbibufs = 2;
218 if (vbibufs > VIDEO_MAX_FRAME)
219 vbibufs = VIDEO_MAX_FRAME;
220 return 0;
221}
222
223int saa7134_vbi_fini(struct saa7134_dev *dev)
224{
225
226 return 0;
227}
228
229void saa7134_irq_vbi_done(struct saa7134_dev *dev, unsigned long status)
230{
231 spin_lock(&dev->slock);
232 if (dev->vbi_q.curr) {
233 dev->vbi_fieldcount++;
234
235 if ((status & 0x10) == 0x00) {
236 dev->vbi_q.curr->top_seen = 1;
237 goto done;
238 }
239 if (!dev->vbi_q.curr->top_seen)
240 goto done;
241
242 dev->vbi_q.curr->vb.field_count = dev->vbi_fieldcount;
243 saa7134_buffer_finish(dev,&dev->vbi_q,VIDEOBUF_DONE);
244 }
245 saa7134_buffer_next(dev,&dev->vbi_q);
246
247 done:
248 spin_unlock(&dev->slock);
249}
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