drivers/media/video/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 vbibufs = 4;
  10 module_param(vbibufs,int,0644);
  11 MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32");
  12
  13 static unsigned int vbi_debug;
  14 module_param(vbi_debug,int,0644);
  15 MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]");
  16
  17 #define dprintk(level,fmt, arg...)      if (vbi_debug >= level) \
  18         printk(KERN_DEBUG "%s: " fmt, dev->core->name , ## arg)
  19
  20 /* ------------------------------------------------------------------ */
  21
  22 int cx8800_vbi_fmt (struct file *file, void *priv,
  23                                         struct v4l2_format *f)
  24 {
  25         struct cx8800_fh  *fh   = priv;
  26         struct cx8800_dev *dev  = fh->dev;
  27
  28         f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
  29         f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
  30         f->fmt.vbi.offset = 244;
  31         f->fmt.vbi.count[0] = VBI_LINE_COUNT;
  32         f->fmt.vbi.count[1] = VBI_LINE_COUNT;
  33
  34         if (dev->core->tvnorm & V4L2_STD_525_60) {
  35                 /* ntsc */
  36                 f->fmt.vbi.sampling_rate = 28636363;
  37                 f->fmt.vbi.start[0] = 10;
  38                 f->fmt.vbi.start[1] = 273;
  39
  40         } else if (dev->core->tvnorm & V4L2_STD_625_50) {
  41                 /* pal */
  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         return 0;
  47 }
  48
  49 static int cx8800_start_vbi_dma(struct cx8800_dev    *dev,
  50                          struct cx88_dmaqueue *q,
  51                          struct cx88_buffer   *buf)
  52 {
  53         struct cx88_core *core = dev->core;
  54
  55         /* setup fifo + format */
  56         cx88_sram_channel_setup(dev->core, &cx88_sram_channels[SRAM_CH24],
  57                                 buf->vb.width, buf->risc.dma);
  58
  59         cx_write(MO_VBOS_CONTROL, ( (1 << 18) |  // comb filter delay fixup
  60                                     (1 << 15) |  // enable vbi capture
  61                                     (1 << 11) ));
  62
  63         /* reset counter */
  64         cx_write(MO_VBI_GPCNTRL, GP_COUNT_CONTROL_RESET);
  65         q->count = 1;
  66
  67         /* enable irqs */
  68         cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_VIDINT);
  69         cx_set(MO_VID_INTMSK, 0x0f0088);
  70
  71         /* enable capture */
  72         cx_set(VID_CAPTURE_CONTROL,0x18);
  73
  74         /* start dma */
  75         cx_set(MO_DEV_CNTRL2, (1<<5));
  76         cx_set(MO_VID_DMACNTRL, 0x88);
  77
  78         return 0;
  79 }
  80
  81 int cx8800_stop_vbi_dma(struct cx8800_dev *dev)
  82 {
  83         struct cx88_core *core = dev->core;
  84
  85         /* stop dma */
  86         cx_clear(MO_VID_DMACNTRL, 0x88);
  87
  88         /* disable capture */
  89         cx_clear(VID_CAPTURE_CONTROL,0x18);
  90
  91         /* disable irqs */
  92         cx_clear(MO_PCI_INTMSK, PCI_INT_VIDINT);
  93         cx_clear(MO_VID_INTMSK, 0x0f0088);
  94         return 0;
  95 }
  96
  97 int cx8800_restart_vbi_queue(struct cx8800_dev    *dev,
  98                              struct cx88_dmaqueue *q)
  99 {
 100         struct cx88_buffer *buf;
 101
 102         if (list_empty(&q->active))
 103                 return 0;
 104
 105         buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
 106         dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 107                 buf, buf->vb.i);
 108         cx8800_start_vbi_dma(dev, q, buf);
 109         list_for_each_entry(buf, &q->active, vb.queue)
 110                 buf->count = q->count++;
 111         mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
 112         return 0;
 113 }
 114
 115 void cx8800_vbi_timeout(unsigned long data)
 116 {
 117         struct cx8800_dev *dev = (struct cx8800_dev*)data;
 118         struct cx88_core *core = dev->core;
 119         struct cx88_dmaqueue *q = &dev->vbiq;
 120         struct cx88_buffer *buf;
 121         unsigned long flags;
 122
 123         cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH24]);
 124
 125         cx_clear(MO_VID_DMACNTRL, 0x88);
 126         cx_clear(VID_CAPTURE_CONTROL, 0x18);
 127
 128         spin_lock_irqsave(&dev->slock,flags);
 129         while (!list_empty(&q->active)) {
 130                 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
 131                 list_del(&buf->vb.queue);
 132                 buf->vb.state = VIDEOBUF_ERROR;
 133                 wake_up(&buf->vb.done);
 134                 printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->core->name,
 135                        buf, buf->vb.i, (unsigned long)buf->risc.dma);
 136         }
 137         cx8800_restart_vbi_queue(dev,q);
 138         spin_unlock_irqrestore(&dev->slock,flags);
 139 }
 140
 141 /* ------------------------------------------------------------------ */
 142
 143 static int
 144 vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
 145 {
 146         *size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
 147         if (0 == *count)
 148                 *count = vbibufs;
 149         if (*count < 2)
 150                 *count = 2;
 151         if (*count > 32)
 152                 *count = 32;
 153         return 0;
 154 }
 155
 156 static int
 157 vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
 158             enum v4l2_field field)
 159 {
 160         struct cx8800_fh   *fh  = q->priv_data;
 161         struct cx8800_dev  *dev = fh->dev;
 162         struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
 163         unsigned int size;
 164         int rc;
 165
 166         size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
 167         if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
 168                 return -EINVAL;
 169
 170         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 171                 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
 172                 buf->vb.width  = VBI_LINE_LENGTH;
 173                 buf->vb.height = VBI_LINE_COUNT;
 174                 buf->vb.size   = size;
 175                 buf->vb.field  = V4L2_FIELD_SEQ_TB;
 176
 177                 if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
 178                         goto fail;
 179                 cx88_risc_buffer(dev->pci, &buf->risc,
 180                                  dma->sglist,
 181                                  0, buf->vb.width * buf->vb.height,
 182                                  buf->vb.width, 0,
 183                                  buf->vb.height);
 184         }
 185         buf->vb.state = VIDEOBUF_PREPARED;
 186         return 0;
 187
 188  fail:
 189         cx88_free_buffer(q,buf);
 190         return rc;
 191 }
 192
 193 static void
 194 vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 195 {
 196         struct cx88_buffer    *buf = container_of(vb,struct cx88_buffer,vb);
 197         struct cx88_buffer    *prev;
 198         struct cx8800_fh      *fh   = vq->priv_data;
 199         struct cx8800_dev     *dev  = fh->dev;
 200         struct cx88_dmaqueue  *q    = &dev->vbiq;
 201
 202         /* add jump to stopper */
 203         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 204         buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
 205
 206         if (list_empty(&q->active)) {
 207                 list_add_tail(&buf->vb.queue,&q->active);
 208                 cx8800_start_vbi_dma(dev, q, buf);
 209                 buf->vb.state = VIDEOBUF_ACTIVE;
 210                 buf->count    = q->count++;
 211                 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
 212                 dprintk(2,"[%p/%d] vbi_queue - first active\n",
 213                         buf, buf->vb.i);
 214
 215         } else {
 216                 prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue);
 217                 list_add_tail(&buf->vb.queue,&q->active);
 218                 buf->vb.state = VIDEOBUF_ACTIVE;
 219                 buf->count    = q->count++;
 220                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 221                 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
 222                         buf, buf->vb.i);
 223         }
 224 }
 225
 226 static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
 227 {
 228         struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
 229
 230         cx88_free_buffer(q,buf);
 231 }
 232
 233 const struct videobuf_queue_ops cx8800_vbi_qops = {
 234         .buf_setup    = vbi_setup,
 235         .buf_prepare  = vbi_prepare,
 236         .buf_queue    = vbi_queue,
 237         .buf_release  = vbi_release,
 238 };
 239
 240 /* ------------------------------------------------------------------ */
 241 /*
 242  * Local variables:
 243  * c-basic-offset: 8
 244  * End:
 245  */