7510e80eb2ff89537ec360ebb43867b382320e5f
[sfrench/cifs-2.6.git] / drivers / media / pci / cx88 / cx88-vbi.c
1 /*
2  */
3 #include <linux/kernel.h>
4 #include <linux/module.h>
5 #include <linux/init.h>
6
7 #include "cx88.h"
8
9 static unsigned int vbi_debug;
10 module_param(vbi_debug,int,0644);
11 MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]");
12
13 #define dprintk(level,fmt, arg...)      if (vbi_debug >= level) \
14         printk(KERN_DEBUG "%s: " fmt, dev->core->name , ## arg)
15
16 /* ------------------------------------------------------------------ */
17
18 int cx8800_vbi_fmt (struct file *file, void *priv,
19                                         struct v4l2_format *f)
20 {
21         struct cx8800_dev *dev = video_drvdata(file);
22
23         f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
24         f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
25         f->fmt.vbi.offset = 244;
26
27         if (dev->core->tvnorm & V4L2_STD_525_60) {
28                 /* ntsc */
29                 f->fmt.vbi.sampling_rate = 28636363;
30                 f->fmt.vbi.start[0] = 10;
31                 f->fmt.vbi.start[1] = 273;
32                 f->fmt.vbi.count[0] = VBI_LINE_NTSC_COUNT;
33                 f->fmt.vbi.count[1] = VBI_LINE_NTSC_COUNT;
34
35         } else if (dev->core->tvnorm & V4L2_STD_625_50) {
36                 /* pal */
37                 f->fmt.vbi.sampling_rate = 35468950;
38                 f->fmt.vbi.start[0] = V4L2_VBI_ITU_625_F1_START + 5;
39                 f->fmt.vbi.start[1] = V4L2_VBI_ITU_625_F2_START + 5;
40                 f->fmt.vbi.count[0] = VBI_LINE_PAL_COUNT;
41                 f->fmt.vbi.count[1] = VBI_LINE_PAL_COUNT;
42         }
43         return 0;
44 }
45
46 static int cx8800_start_vbi_dma(struct cx8800_dev    *dev,
47                          struct cx88_dmaqueue *q,
48                          struct cx88_buffer   *buf)
49 {
50         struct cx88_core *core = dev->core;
51
52         /* setup fifo + format */
53         cx88_sram_channel_setup(dev->core, &cx88_sram_channels[SRAM_CH24],
54                                 VBI_LINE_LENGTH, buf->risc.dma);
55
56         cx_write(MO_VBOS_CONTROL, ( (1 << 18) |  // comb filter delay fixup
57                                     (1 << 15) |  // enable vbi capture
58                                     (1 << 11) ));
59
60         /* reset counter */
61         cx_write(MO_VBI_GPCNTRL, GP_COUNT_CONTROL_RESET);
62         q->count = 0;
63
64         /* enable irqs */
65         cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_VIDINT);
66         cx_set(MO_VID_INTMSK, 0x0f0088);
67
68         /* enable capture */
69         cx_set(VID_CAPTURE_CONTROL,0x18);
70
71         /* start dma */
72         cx_set(MO_DEV_CNTRL2, (1<<5));
73         cx_set(MO_VID_DMACNTRL, 0x88);
74
75         return 0;
76 }
77
78 void cx8800_stop_vbi_dma(struct cx8800_dev *dev)
79 {
80         struct cx88_core *core = dev->core;
81
82         /* stop dma */
83         cx_clear(MO_VID_DMACNTRL, 0x88);
84
85         /* disable capture */
86         cx_clear(VID_CAPTURE_CONTROL,0x18);
87
88         /* disable irqs */
89         cx_clear(MO_PCI_INTMSK, PCI_INT_VIDINT);
90         cx_clear(MO_VID_INTMSK, 0x0f0088);
91 }
92
93 int cx8800_restart_vbi_queue(struct cx8800_dev    *dev,
94                              struct cx88_dmaqueue *q)
95 {
96         struct cx88_buffer *buf;
97
98         if (list_empty(&q->active))
99                 return 0;
100
101         buf = list_entry(q->active.next, struct cx88_buffer, list);
102         dprintk(2,"restart_queue [%p/%d]: restart dma\n",
103                 buf, buf->vb.v4l2_buf.index);
104         cx8800_start_vbi_dma(dev, q, buf);
105         return 0;
106 }
107
108 /* ------------------------------------------------------------------ */
109
110 static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
111                            unsigned int *num_buffers, unsigned int *num_planes,
112                            unsigned int sizes[], void *alloc_ctxs[])
113 {
114         struct cx8800_dev *dev = q->drv_priv;
115
116         *num_planes = 1;
117         if (dev->core->tvnorm & V4L2_STD_525_60)
118                 sizes[0] = VBI_LINE_NTSC_COUNT * VBI_LINE_LENGTH * 2;
119         else
120                 sizes[0] = VBI_LINE_PAL_COUNT * VBI_LINE_LENGTH * 2;
121         alloc_ctxs[0] = dev->alloc_ctx;
122         return 0;
123 }
124
125
126 static int buffer_prepare(struct vb2_buffer *vb)
127 {
128         struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
129         struct cx88_buffer *buf = container_of(vb, struct cx88_buffer, vb);
130         struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
131         unsigned int lines;
132         unsigned int size;
133
134         if (dev->core->tvnorm & V4L2_STD_525_60)
135                 lines = VBI_LINE_NTSC_COUNT;
136         else
137                 lines = VBI_LINE_PAL_COUNT;
138         size = lines * VBI_LINE_LENGTH * 2;
139         if (vb2_plane_size(vb, 0) < size)
140                 return -EINVAL;
141         vb2_set_plane_payload(vb, 0, size);
142
143         cx88_risc_buffer(dev->pci, &buf->risc, sgt->sgl,
144                          0, VBI_LINE_LENGTH * lines,
145                          VBI_LINE_LENGTH, 0,
146                          lines);
147         return 0;
148 }
149
150 static void buffer_finish(struct vb2_buffer *vb)
151 {
152         struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
153         struct cx88_buffer *buf = container_of(vb, struct cx88_buffer, vb);
154         struct cx88_riscmem *risc = &buf->risc;
155
156         if (risc->cpu)
157                 pci_free_consistent(dev->pci, risc->size, risc->cpu, risc->dma);
158         memset(risc, 0, sizeof(*risc));
159 }
160
161 static void buffer_queue(struct vb2_buffer *vb)
162 {
163         struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
164         struct cx88_buffer    *buf = container_of(vb, struct cx88_buffer, vb);
165         struct cx88_buffer    *prev;
166         struct cx88_dmaqueue  *q    = &dev->vbiq;
167
168         /* add jump to start */
169         buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
170         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
171         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);
172
173         if (list_empty(&q->active)) {
174                 list_add_tail(&buf->list, &q->active);
175                 cx8800_start_vbi_dma(dev, q, buf);
176                 dprintk(2,"[%p/%d] vbi_queue - first active\n",
177                         buf, buf->vb.v4l2_buf.index);
178
179         } else {
180                 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
181                 prev = list_entry(q->active.prev, struct cx88_buffer, list);
182                 list_add_tail(&buf->list, &q->active);
183                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
184                 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
185                         buf, buf->vb.v4l2_buf.index);
186         }
187 }
188
189 static int start_streaming(struct vb2_queue *q, unsigned int count)
190 {
191         struct cx8800_dev *dev = q->drv_priv;
192         struct cx88_dmaqueue *dmaq = &dev->vbiq;
193         struct cx88_buffer *buf = list_entry(dmaq->active.next,
194                         struct cx88_buffer, list);
195
196         cx8800_start_vbi_dma(dev, dmaq, buf);
197         return 0;
198 }
199
200 static void stop_streaming(struct vb2_queue *q)
201 {
202         struct cx8800_dev *dev = q->drv_priv;
203         struct cx88_core *core = dev->core;
204         struct cx88_dmaqueue *dmaq = &dev->vbiq;
205         unsigned long flags;
206
207         cx_clear(MO_VID_DMACNTRL, 0x11);
208         cx_clear(VID_CAPTURE_CONTROL, 0x06);
209         cx8800_stop_vbi_dma(dev);
210         spin_lock_irqsave(&dev->slock, flags);
211         while (!list_empty(&dmaq->active)) {
212                 struct cx88_buffer *buf = list_entry(dmaq->active.next,
213                         struct cx88_buffer, list);
214
215                 list_del(&buf->list);
216                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
217         }
218         spin_unlock_irqrestore(&dev->slock, flags);
219 }
220
221 const struct vb2_ops cx8800_vbi_qops = {
222         .queue_setup    = queue_setup,
223         .buf_prepare  = buffer_prepare,
224         .buf_finish = buffer_finish,
225         .buf_queue    = buffer_queue,
226         .wait_prepare = vb2_ops_wait_prepare,
227         .wait_finish = vb2_ops_wait_finish,
228         .start_streaming = start_streaming,
229         .stop_streaming = stop_streaming,
230 };