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