drivers/media/video/cx88/cx88-vbi.c

   1 #include <linux/kernel.h>
   2 #include <linux/module.h>
   3 #include <linux/init.h>
   4 #include <linux/slab.h>
   5
   6 #include "cx88.h"
   7
   8 static unsigned int vbibufs = 4;
   9 MODULE_PARM(vbibufs,"i");
  10 MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32");
  11
  12 static unsigned int vbi_debug = 0;
  13 MODULE_PARM(vbi_debug,"i");
  14 MODULE_PARM_DESC(vbi_debug,"enable debug messages [video]");
  15
  16 #define dprintk(level,fmt, arg...)      if (vbi_debug >= level) \
  17         printk(KERN_DEBUG "%s: " fmt, dev->name , ## arg)
  18
  19 /* ------------------------------------------------------------------ */
  20
  21 void cx8800_vbi_fmt(struct cx8800_dev *dev, struct v4l2_format *f)
  22 {
  23         memset(&f->fmt.vbi,0,sizeof(f->fmt.vbi));
  24
  25         f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
  26         f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
  27         f->fmt.vbi.offset = 244;
  28         f->fmt.vbi.count[0] = VBI_LINE_COUNT;
  29         f->fmt.vbi.count[1] = VBI_LINE_COUNT;
  30
  31         switch (dev->tvnorm->id) {
  32         case V4L2_STD_NTSC_M:
  33         case V4L2_STD_NTSC_M_JP:
  34                 f->fmt.vbi.sampling_rate = 28636363;
  35                 f->fmt.vbi.start[0] = 10 -1;
  36                 f->fmt.vbi.start[1] = 273 -1;
  37                 break;
  38         case V4L2_STD_PAL_BG:
  39         case V4L2_STD_PAL_DK:
  40         case V4L2_STD_PAL_I:
  41         case V4L2_STD_SECAM:
  42                 f->fmt.vbi.sampling_rate = 35468950;
  43                 f->fmt.vbi.start[0] = 7 -1;
  44                 f->fmt.vbi.start[1] = 319 -1;
  45         }
  46 }
  47
  48 int cx8800_start_vbi_dma(struct cx8800_dev    *dev,
  49                          struct cx88_dmaqueue *q,
  50                          struct cx88_buffer   *buf)
  51 {
  52         /* setup fifo + format */
  53         cx88_sram_channel_setup(dev, &cx88_sram_channels[SRAM_CH24],
  54                                 buf->vb.width, 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,0x3);
  62         q->count = 1;
  63
  64         /* enable irqs */
  65         cx_set(MO_PCI_INTMSK, 0x00fc01);
  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 int cx8800_restart_vbi_queue(struct cx8800_dev    *dev,
  79                              struct cx88_dmaqueue *q)
  80 {
  81         struct cx88_buffer *buf;
  82         struct list_head *item;
  83
  84         if (list_empty(&q->active))
  85                 return 0;
  86
  87         buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
  88         dprintk(2,"restart_queue [%p/%d]: restart dma\n",
  89                 buf, buf->vb.i);
  90         cx8800_start_vbi_dma(dev, q, buf);
  91         list_for_each(item,&q->active) {
  92                 buf = list_entry(item, struct cx88_buffer, vb.queue);
  93                 buf->count = q->count++;
  94         }
  95         mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
  96         return 0;
  97 }
  98
  99 void cx8800_vbi_timeout(unsigned long data)
 100 {
 101         struct cx8800_dev *dev = (struct cx8800_dev*)data;
 102         struct cx88_dmaqueue *q = &dev->vbiq;
 103         struct cx88_buffer *buf;
 104         unsigned long flags;
 105
 106         cx88_sram_channel_dump(dev, &cx88_sram_channels[SRAM_CH24]);
 107
 108         cx_clear(MO_VID_DMACNTRL, 0x88);
 109         cx_clear(VID_CAPTURE_CONTROL, 0x18);
 110
 111         spin_lock_irqsave(&dev->slock,flags);
 112         while (!list_empty(&q->active)) {
 113                 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
 114                 list_del(&buf->vb.queue);
 115                 buf->vb.state = STATE_ERROR;
 116                 wake_up(&buf->vb.done);
 117                 printk("%s: [%p/%d] timeout - dma=0x%08lx\n", dev->name,
 118                        buf, buf->vb.i, (unsigned long)buf->risc.dma);
 119         }
 120         cx8800_restart_vbi_queue(dev,q);
 121         spin_unlock_irqrestore(&dev->slock,flags);
 122 }
 123
 124 /* ------------------------------------------------------------------ */
 125
 126 static int
 127 vbi_setup(struct file *file, unsigned int *count, unsigned int *size)
 128 {
 129         *size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
 130         if (0 == *count)
 131                 *count = vbibufs;
 132         if (*count < 2)
 133                 *count = 2;
 134         if (*count > 32)
 135                 *count = 32;
 136         return 0;
 137 }
 138
 139 static int
 140 vbi_prepare(struct file *file, struct videobuf_buffer *vb,
 141             enum v4l2_field field)
 142 {
 143         struct cx8800_fh   *fh  = file->private_data;
 144         struct cx8800_dev  *dev = fh->dev;
 145         struct cx88_buffer *buf = (struct cx88_buffer*)vb;
 146         unsigned int size;
 147         int rc;
 148
 149         size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
 150         if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
 151                 return -EINVAL;
 152
 153         if (STATE_NEEDS_INIT == buf->vb.state) {
 154                 buf->vb.width  = VBI_LINE_LENGTH;
 155                 buf->vb.height = VBI_LINE_COUNT;
 156                 buf->vb.size   = size;
 157                 buf->vb.field  = V4L2_FIELD_SEQ_TB;
 158
 159                 if (0 != (rc = videobuf_iolock(dev->pci,&buf->vb,NULL)))
 160                         goto fail;
 161                 cx88_risc_buffer(dev->pci, &buf->risc,
 162                                  buf->vb.dma.sglist,
 163                                  0, buf->vb.width * buf->vb.height,
 164                                  buf->vb.width, 0,
 165                                  buf->vb.height);
 166         }
 167         buf->vb.state = STATE_PREPARED;
 168         return 0;
 169
 170  fail:
 171         cx88_free_buffer(dev->pci,buf);
 172         return rc;
 173 }
 174
 175 static void
 176 vbi_queue(struct file *file, struct videobuf_buffer *vb)
 177 {
 178         struct cx88_buffer    *buf  = (struct cx88_buffer*)vb;
 179         struct cx88_buffer    *prev;
 180         struct cx8800_fh      *fh   = file->private_data;
 181         struct cx8800_dev     *dev  = fh->dev;
 182         struct cx88_dmaqueue  *q    = &dev->vbiq;
 183
 184         /* add jump to stopper */
 185         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | 0x10000);
 186         buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
 187
 188         if (list_empty(&q->active)) {
 189                 list_add_tail(&buf->vb.queue,&q->active);
 190                 cx8800_start_vbi_dma(dev, q, buf);
 191                 buf->vb.state = STATE_ACTIVE;
 192                 buf->count    = q->count++;
 193                 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
 194                 dprintk(2,"[%p/%d] vbi_queue - first active\n",
 195                         buf, buf->vb.i);
 196
 197         } else {
 198                 prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue);
 199                 list_add_tail(&buf->vb.queue,&q->active);
 200                 buf->vb.state = STATE_ACTIVE;
 201                 buf->count    = q->count++;
 202                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 203                 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
 204                         buf, buf->vb.i);
 205         }
 206 }
 207
 208 static void vbi_release(struct file *file, struct videobuf_buffer *vb)
 209 {
 210         struct cx88_buffer *buf = (struct cx88_buffer*)vb;
 211         struct cx8800_fh   *fh  = file->private_data;
 212
 213         cx88_free_buffer(fh->dev->pci,buf);
 214 }
 215
 216 struct videobuf_queue_ops cx8800_vbi_qops = {
 217         .buf_setup    = vbi_setup,
 218         .buf_prepare  = vbi_prepare,
 219         .buf_queue    = vbi_queue,
 220         .buf_release  = vbi_release,
 221 };
 222
 223 /* ------------------------------------------------------------------ */
 224 /*
 225  * Local variables:
 226  * c-basic-offset: 8
 227  * End:
 228  */