[media] media: videobuf2: Restructure vb2_buffer
[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.vb2_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 vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
129         struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
130         struct cx88_buffer *buf = container_of(vbuf, struct cx88_buffer, vb);
131         struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
132         unsigned int lines;
133         unsigned int size;
134
135         if (dev->core->tvnorm & V4L2_STD_525_60)
136                 lines = VBI_LINE_NTSC_COUNT;
137         else
138                 lines = VBI_LINE_PAL_COUNT;
139         size = lines * VBI_LINE_LENGTH * 2;
140         if (vb2_plane_size(vb, 0) < size)
141                 return -EINVAL;
142         vb2_set_plane_payload(vb, 0, size);
143
144         cx88_risc_buffer(dev->pci, &buf->risc, sgt->sgl,
145                          0, VBI_LINE_LENGTH * lines,
146                          VBI_LINE_LENGTH, 0,
147                          lines);
148         return 0;
149 }
150
151 static void buffer_finish(struct vb2_buffer *vb)
152 {
153         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
154         struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
155         struct cx88_buffer *buf = container_of(vbuf, struct cx88_buffer, vb);
156         struct cx88_riscmem *risc = &buf->risc;
157
158         if (risc->cpu)
159                 pci_free_consistent(dev->pci, risc->size, risc->cpu, risc->dma);
160         memset(risc, 0, sizeof(*risc));
161 }
162
163 static void buffer_queue(struct vb2_buffer *vb)
164 {
165         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
166         struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
167         struct cx88_buffer    *buf = container_of(vbuf, struct cx88_buffer, vb);
168         struct cx88_buffer    *prev;
169         struct cx88_dmaqueue  *q    = &dev->vbiq;
170
171         /* add jump to start */
172         buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
173         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
174         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);
175
176         if (list_empty(&q->active)) {
177                 list_add_tail(&buf->list, &q->active);
178                 cx8800_start_vbi_dma(dev, q, buf);
179                 dprintk(2,"[%p/%d] vbi_queue - first active\n",
180                         buf, buf->vb.vb2_buf.index);
181
182         } else {
183                 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
184                 prev = list_entry(q->active.prev, struct cx88_buffer, list);
185                 list_add_tail(&buf->list, &q->active);
186                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
187                 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
188                         buf, buf->vb.vb2_buf.index);
189         }
190 }
191
192 static int start_streaming(struct vb2_queue *q, unsigned int count)
193 {
194         struct cx8800_dev *dev = q->drv_priv;
195         struct cx88_dmaqueue *dmaq = &dev->vbiq;
196         struct cx88_buffer *buf = list_entry(dmaq->active.next,
197                         struct cx88_buffer, list);
198
199         cx8800_start_vbi_dma(dev, dmaq, buf);
200         return 0;
201 }
202
203 static void stop_streaming(struct vb2_queue *q)
204 {
205         struct cx8800_dev *dev = q->drv_priv;
206         struct cx88_core *core = dev->core;
207         struct cx88_dmaqueue *dmaq = &dev->vbiq;
208         unsigned long flags;
209
210         cx_clear(MO_VID_DMACNTRL, 0x11);
211         cx_clear(VID_CAPTURE_CONTROL, 0x06);
212         cx8800_stop_vbi_dma(dev);
213         spin_lock_irqsave(&dev->slock, flags);
214         while (!list_empty(&dmaq->active)) {
215                 struct cx88_buffer *buf = list_entry(dmaq->active.next,
216                         struct cx88_buffer, list);
217
218                 list_del(&buf->list);
219                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
220         }
221         spin_unlock_irqrestore(&dev->slock, flags);
222 }
223
224 const struct vb2_ops cx8800_vbi_qops = {
225         .queue_setup    = queue_setup,
226         .buf_prepare  = buffer_prepare,
227         .buf_finish = buffer_finish,
228         .buf_queue    = buffer_queue,
229         .wait_prepare = vb2_ops_wait_prepare,
230         .wait_finish = vb2_ops_wait_finish,
231         .start_streaming = start_streaming,
232         .stop_streaming = stop_streaming,
233 };