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18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/moduleparam.h>
21#include <linux/init.h>
22
23#include "cx23885.h"
24
25static unsigned int vbibufs = 4;
26module_param(vbibufs, int, 0644);
27MODULE_PARM_DESC(vbibufs, "number of vbi buffers, range 2-32");
28
29static unsigned int vbi_debug;
30module_param(vbi_debug, int, 0644);
31MODULE_PARM_DESC(vbi_debug, "enable debug messages [vbi]");
32
33#define dprintk(level, fmt, arg...)\
34 do { if (vbi_debug >= level)\
35 printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\
36 } while (0)
37
38
39
40#define VBI_LINE_LENGTH 1440
41#define VBI_NTSC_LINE_COUNT 12
42#define VBI_PAL_LINE_COUNT 18
43
44
45int cx23885_vbi_fmt(struct file *file, void *priv,
46 struct v4l2_format *f)
47{
48 struct cx23885_dev *dev = video_drvdata(file);
49
50 f->fmt.vbi.sampling_rate = 27000000;
51 f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
52 f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
53 f->fmt.vbi.offset = 0;
54 f->fmt.vbi.flags = 0;
55 if (dev->tvnorm & V4L2_STD_525_60) {
56
57 f->fmt.vbi.start[0] = V4L2_VBI_ITU_525_F1_START + 9;
58 f->fmt.vbi.start[1] = V4L2_VBI_ITU_525_F2_START + 9;
59 f->fmt.vbi.count[0] = VBI_NTSC_LINE_COUNT;
60 f->fmt.vbi.count[1] = VBI_NTSC_LINE_COUNT;
61 } else if (dev->tvnorm & V4L2_STD_625_50) {
62
63 f->fmt.vbi.start[0] = V4L2_VBI_ITU_625_F1_START + 5;
64 f->fmt.vbi.start[1] = V4L2_VBI_ITU_625_F2_START + 5;
65 f->fmt.vbi.count[0] = VBI_PAL_LINE_COUNT;
66 f->fmt.vbi.count[1] = VBI_PAL_LINE_COUNT;
67 }
68
69 return 0;
70}
71
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76
77
78int cx23885_vbi_irq(struct cx23885_dev *dev, u32 status)
79{
80 u32 count;
81 int handled = 0;
82
83 if (status & VID_BC_MSK_VBI_RISCI1) {
84 dprintk(1, "%s() VID_BC_MSK_VBI_RISCI1\n", __func__);
85 spin_lock(&dev->slock);
86 count = cx_read(VID_A_GPCNT);
87 cx23885_video_wakeup(dev, &dev->vbiq, count);
88 spin_unlock(&dev->slock);
89 handled++;
90 }
91
92 return handled;
93}
94
95static int cx23885_start_vbi_dma(struct cx23885_dev *dev,
96 struct cx23885_dmaqueue *q,
97 struct cx23885_buffer *buf)
98{
99 dprintk(1, "%s()\n", __func__);
100
101
102 cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02],
103 VBI_LINE_LENGTH, buf->risc.dma);
104
105
106 cx_write(VID_A_GPCNT_CTL, 3);
107 cx_write(VID_A_VBI_CTRL, 3);
108 cx_write(VBI_A_GPCNT_CTL, 3);
109 q->count = 0;
110
111
112 cx23885_irq_add_enable(dev, 0x01);
113 cx_set(VID_A_INT_MSK, 0x000022);
114
115
116 cx_set(DEV_CNTRL2, (1<<5));
117 cx_set(VID_A_DMA_CTL, 0x22);
118
119 return 0;
120}
121
122
123
124static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
125 unsigned int *num_buffers, unsigned int *num_planes,
126 unsigned int sizes[], void *alloc_ctxs[])
127{
128 struct cx23885_dev *dev = q->drv_priv;
129 unsigned lines = VBI_PAL_LINE_COUNT;
130
131 if (dev->tvnorm & V4L2_STD_525_60)
132 lines = VBI_NTSC_LINE_COUNT;
133 *num_planes = 1;
134 sizes[0] = lines * VBI_LINE_LENGTH * 2;
135 alloc_ctxs[0] = dev->alloc_ctx;
136 return 0;
137}
138
139static int buffer_prepare(struct vb2_buffer *vb)
140{
141 struct cx23885_dev *dev = vb->vb2_queue->drv_priv;
142 struct cx23885_buffer *buf = container_of(vb,
143 struct cx23885_buffer, vb);
144 struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
145 unsigned lines = VBI_PAL_LINE_COUNT;
146
147 if (dev->tvnorm & V4L2_STD_525_60)
148 lines = VBI_NTSC_LINE_COUNT;
149
150 if (vb2_plane_size(vb, 0) < lines * VBI_LINE_LENGTH * 2)
151 return -EINVAL;
152 vb2_set_plane_payload(vb, 0, lines * VBI_LINE_LENGTH * 2);
153
154 cx23885_risc_vbibuffer(dev->pci, &buf->risc,
155 sgt->sgl,
156 0, VBI_LINE_LENGTH * lines,
157 VBI_LINE_LENGTH, 0,
158 lines);
159 return 0;
160}
161
162static void buffer_finish(struct vb2_buffer *vb)
163{
164 struct cx23885_buffer *buf = container_of(vb,
165 struct cx23885_buffer, vb);
166
167 cx23885_free_buffer(vb->vb2_queue->drv_priv, buf);
168}
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190
191static void buffer_queue(struct vb2_buffer *vb)
192{
193 struct cx23885_dev *dev = vb->vb2_queue->drv_priv;
194 struct cx23885_buffer *buf = container_of(vb, struct cx23885_buffer, vb);
195 struct cx23885_buffer *prev;
196 struct cx23885_dmaqueue *q = &dev->vbiq;
197 unsigned long flags;
198
199 buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 12);
200 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
201 buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 12);
202 buf->risc.jmp[2] = cpu_to_le32(0);
203
204 if (list_empty(&q->active)) {
205 spin_lock_irqsave(&dev->slock, flags);
206 list_add_tail(&buf->queue, &q->active);
207 spin_unlock_irqrestore(&dev->slock, flags);
208 dprintk(2, "[%p/%d] vbi_queue - first active\n",
209 buf, buf->vb.v4l2_buf.index);
210
211 } else {
212 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
213 prev = list_entry(q->active.prev, struct cx23885_buffer,
214 queue);
215 spin_lock_irqsave(&dev->slock, flags);
216 list_add_tail(&buf->queue, &q->active);
217 spin_unlock_irqrestore(&dev->slock, flags);
218 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
219 dprintk(2, "[%p/%d] buffer_queue - append to active\n",
220 buf, buf->vb.v4l2_buf.index);
221 }
222}
223
224static int cx23885_start_streaming(struct vb2_queue *q, unsigned int count)
225{
226 struct cx23885_dev *dev = q->drv_priv;
227 struct cx23885_dmaqueue *dmaq = &dev->vbiq;
228 struct cx23885_buffer *buf = list_entry(dmaq->active.next,
229 struct cx23885_buffer, queue);
230
231 cx23885_start_vbi_dma(dev, dmaq, buf);
232 return 0;
233}
234
235static void cx23885_stop_streaming(struct vb2_queue *q)
236{
237 struct cx23885_dev *dev = q->drv_priv;
238 struct cx23885_dmaqueue *dmaq = &dev->vbiq;
239 unsigned long flags;
240
241 cx_clear(VID_A_DMA_CTL, 0x22);
242 spin_lock_irqsave(&dev->slock, flags);
243 while (!list_empty(&dmaq->active)) {
244 struct cx23885_buffer *buf = list_entry(dmaq->active.next,
245 struct cx23885_buffer, queue);
246
247 list_del(&buf->queue);
248 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
249 }
250 spin_unlock_irqrestore(&dev->slock, flags);
251}
252
253
254struct vb2_ops cx23885_vbi_qops = {
255 .queue_setup = queue_setup,
256 .buf_prepare = buffer_prepare,
257 .buf_finish = buffer_finish,
258 .buf_queue = buffer_queue,
259 .wait_prepare = vb2_ops_wait_prepare,
260 .wait_finish = vb2_ops_wait_finish,
261 .start_streaming = cx23885_start_streaming,
262 .stop_streaming = cx23885_stop_streaming,
263};
264