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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 17
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), dev->vbi_hlen & 0xff);
71 saa_writeb(SAA7134_VBI_H_LEN2(task), dev->vbi_hlen >> 8);
72 saa_writeb(SAA7134_VBI_V_LEN1(task), dev->vbi_vlen & 0xff);
73 saa_writeb(SAA7134_VBI_V_LEN2(task), dev->vbi_vlen >> 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 struct saa7134_dmaqueue *dmaq = buf->vb2.vb2_queue->drv_priv;
85 unsigned long control, base;
86
87 dprintk("buffer_activate [%p]\n", buf);
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 (dmaq->pt.dma >> 12);
100 saa_writel(SAA7134_RS_BA1(2), base);
101 saa_writel(SAA7134_RS_BA2(2), base + dev->vbi_hlen * dev->vbi_vlen);
102 saa_writel(SAA7134_RS_PITCH(2), dev->vbi_hlen);
103 saa_writel(SAA7134_RS_CONTROL(2), control);
104 saa_writel(SAA7134_RS_BA1(3), base);
105 saa_writel(SAA7134_RS_BA2(3), base + dev->vbi_hlen * dev->vbi_vlen);
106 saa_writel(SAA7134_RS_PITCH(3), dev->vbi_hlen);
107 saa_writel(SAA7134_RS_CONTROL(3), control);
108
109
110 saa7134_set_dmabits(dev);
111 mod_timer(&dmaq->timeout, jiffies + BUFFER_TIMEOUT);
112
113 return 0;
114}
115
116static int buffer_prepare(struct vb2_buffer *vb2)
117{
118 struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv;
119 struct saa7134_dev *dev = dmaq->dev;
120 struct saa7134_buf *buf = container_of(vb2, struct saa7134_buf, vb2);
121 struct sg_table *dma = vb2_dma_sg_plane_desc(&buf->vb2, 0);
122 unsigned int size;
123 int ret;
124
125 if (dma->sgl->offset) {
126 pr_err("The buffer is not page-aligned\n");
127 return -EINVAL;
128 }
129 size = dev->vbi_hlen * dev->vbi_vlen * 2;
130 if (vb2_plane_size(vb2, 0) < size)
131 return -EINVAL;
132
133 vb2_set_plane_payload(vb2, 0, size);
134
135 ret = dma_map_sg(&dev->pci->dev, dma->sgl, dma->nents, DMA_FROM_DEVICE);
136 if (!ret)
137 return -EIO;
138 return saa7134_pgtable_build(dev->pci, &dmaq->pt, dma->sgl, dma->nents,
139 saa7134_buffer_startpage(buf));
140}
141
142static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
143 unsigned int *nbuffers, unsigned int *nplanes,
144 unsigned int sizes[], void *alloc_ctxs[])
145{
146 struct saa7134_dmaqueue *dmaq = q->drv_priv;
147 struct saa7134_dev *dev = dmaq->dev;
148 unsigned int size;
149
150 dev->vbi_vlen = dev->tvnorm->vbi_v_stop_0 - dev->tvnorm->vbi_v_start_0 + 1;
151 if (dev->vbi_vlen > VBI_LINE_COUNT)
152 dev->vbi_vlen = VBI_LINE_COUNT;
153 dev->vbi_hlen = VBI_LINE_LENGTH;
154 size = dev->vbi_hlen * dev->vbi_vlen * 2;
155
156 *nbuffers = saa7134_buffer_count(size, *nbuffers);
157 *nplanes = 1;
158 sizes[0] = size;
159 return 0;
160}
161
162static int buffer_init(struct vb2_buffer *vb2)
163{
164 struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv;
165 struct saa7134_buf *buf = container_of(vb2, struct saa7134_buf, vb2);
166
167 dmaq->curr = NULL;
168 buf->activate = buffer_activate;
169 return 0;
170}
171
172static void buffer_finish(struct vb2_buffer *vb2)
173{
174 struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv;
175 struct saa7134_dev *dev = dmaq->dev;
176 struct saa7134_buf *buf = container_of(vb2, struct saa7134_buf, vb2);
177 struct sg_table *dma = vb2_dma_sg_plane_desc(&buf->vb2, 0);
178
179 dma_unmap_sg(&dev->pci->dev, dma->sgl, dma->nents, DMA_FROM_DEVICE);
180}
181
182struct vb2_ops saa7134_vbi_qops = {
183 .queue_setup = queue_setup,
184 .buf_init = buffer_init,
185 .buf_prepare = buffer_prepare,
186 .buf_finish = buffer_finish,
187 .buf_queue = saa7134_vb2_buffer_queue,
188 .wait_prepare = vb2_ops_wait_prepare,
189 .wait_finish = vb2_ops_wait_finish,
190 .start_streaming = saa7134_vb2_start_streaming,
191 .stop_streaming = saa7134_vb2_stop_streaming,
192};
193
194
195
196int saa7134_vbi_init1(struct saa7134_dev *dev)
197{
198 INIT_LIST_HEAD(&dev->vbi_q.queue);
199 init_timer(&dev->vbi_q.timeout);
200 dev->vbi_q.timeout.function = saa7134_buffer_timeout;
201 dev->vbi_q.timeout.data = (unsigned long)(&dev->vbi_q);
202 dev->vbi_q.dev = dev;
203
204 if (vbibufs < 2)
205 vbibufs = 2;
206 if (vbibufs > VIDEO_MAX_FRAME)
207 vbibufs = VIDEO_MAX_FRAME;
208 return 0;
209}
210
211int saa7134_vbi_fini(struct saa7134_dev *dev)
212{
213
214 return 0;
215}
216
217void saa7134_irq_vbi_done(struct saa7134_dev *dev, unsigned long status)
218{
219 spin_lock(&dev->slock);
220 if (dev->vbi_q.curr) {
221
222 if ((status & 0x10) == 0x00) {
223 dev->vbi_q.curr->top_seen = 1;
224 goto done;
225 }
226 if (!dev->vbi_q.curr->top_seen)
227 goto done;
228
229 saa7134_buffer_finish(dev, &dev->vbi_q, VB2_BUF_STATE_DONE);
230 }
231 saa7134_buffer_next(dev, &dev->vbi_q);
232
233 done:
234 spin_unlock(&dev->slock);
235}
236