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

   1 /*
   2  */
   3 #include <linux/kernel.h>
   4 #include <linux/module.h>
   5 #include <linux/moduleparam.h>
   6 #include <linux/init.h>
   7 #include <linux/slab.h>
   8
   9 #include "cx88.h"
  10
  11 static unsigned int vbibufs = 4;
  12 module_param(vbibufs,int,0644);
  13 MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32");
  14
  15 static unsigned int vbi_debug = 0;
  16 module_param(vbi_debug,int,0644);
  17 MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]");
  18
  19 #define dprintk(level,fmt, arg...)      if (vbi_debug >= level) \
  20         printk(KERN_DEBUG "%s: " fmt, dev->core->name , ## arg)
  21
  22 /* ------------------------------------------------------------------ */
  23
  24 void cx8800_vbi_fmt(struct cx8800_dev *dev, struct v4l2_format *f)
  25 {
  26         memset(&f->fmt.vbi,0,sizeof(f->fmt.vbi));
  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->id & V4L2_STD_525_60) {
  35                 /* ntsc */
  36                 f->fmt.vbi.sampling_rate = 28636363;
  37                 f->fmt.vbi.start[0] = 10 -1;
  38                 f->fmt.vbi.start[1] = 273 -1;
  39
  40         } else if (dev->core->tvnorm->id & 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 }
  47
  48 static int cx8800_start_vbi_dma(struct cx8800_dev    *dev,
  49                          struct cx88_dmaqueue *q,
  50                          struct cx88_buffer   *buf)
  51 {
  52         struct cx88_core *core = dev->core;
  53
  54         /* setup fifo + format */
  55         cx88_sram_channel_setup(dev->core, &cx88_sram_channels[SRAM_CH24],
  56                                 buf->vb.width, buf->risc.dma);
  57
  58         cx_write(MO_VBOS_CONTROL, ( (1 << 18) |  // comb filter delay fixup
  59                                     (1 << 15) |  // enable vbi capture
  60                                     (1 << 11) ));
  61
  62         /* reset counter */
  63         cx_write(MO_VBI_GPCNTRL, GP_COUNT_CONTROL_RESET);
  64         q->count = 1;
  65
  66         /* enable irqs */
  67         cx_set(MO_PCI_INTMSK, core->pci_irqmask | 0x01);
  68         cx_set(MO_VID_INTMSK, 0x0f0088);
  69
  70         /* enable capture */
  71         cx_set(VID_CAPTURE_CONTROL,0x18);
  72
  73         /* start dma */
  74         cx_set(MO_DEV_CNTRL2, (1<<5));
  75         cx_set(MO_VID_DMACNTRL, 0x88);
  76
  77         return 0;
  78 }
  79
  80 int cx8800_stop_vbi_dma(struct cx8800_dev *dev)
  81 {
  82         struct cx88_core *core = dev->core;
  83
  84         /* stop dma */
  85         cx_clear(MO_VID_DMACNTRL, 0x88);
  86
  87         /* disable capture */
  88         cx_clear(VID_CAPTURE_CONTROL,0x18);
  89
  90         /* disable irqs */
  91         cx_clear(MO_PCI_INTMSK, 0x000001);
  92         cx_clear(MO_VID_INTMSK, 0x0f0088);
  93         return 0;
  94 }
  95
  96 int cx8800_restart_vbi_queue(struct cx8800_dev    *dev,
  97                              struct cx88_dmaqueue *q)
  98 {
  99         struct cx88_buffer *buf;
 100         struct list_head *item;
 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(item,&q->active) {
 110                 buf = list_entry(item, struct cx88_buffer, vb.queue);
 111                 buf->count = q->count++;
 112         }
 113         mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
 114         return 0;
 115 }
 116
 117 void cx8800_vbi_timeout(unsigned long data)
 118 {
 119         struct cx8800_dev *dev = (struct cx8800_dev*)data;
 120         struct cx88_core *core = dev->core;
 121         struct cx88_dmaqueue *q = &dev->vbiq;
 122         struct cx88_buffer *buf;
 123         unsigned long flags;
 124
 125         cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH24]);
 126
 127         cx_clear(MO_VID_DMACNTRL, 0x88);
 128         cx_clear(VID_CAPTURE_CONTROL, 0x18);
 129
 130         spin_lock_irqsave(&dev->slock,flags);
 131         while (!list_empty(&q->active)) {
 132                 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
 133                 list_del(&buf->vb.queue);
 134                 buf->vb.state = STATE_ERROR;
 135                 wake_up(&buf->vb.done);
 136                 printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->core->name,
 137                        buf, buf->vb.i, (unsigned long)buf->risc.dma);
 138         }
 139         cx8800_restart_vbi_queue(dev,q);
 140         spin_unlock_irqrestore(&dev->slock,flags);
 141 }
 142
 143 /* ------------------------------------------------------------------ */
 144
 145 static int
 146 vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
 147 {
 148         *size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
 149         if (0 == *count)
 150                 *count = vbibufs;
 151         if (*count < 2)
 152                 *count = 2;
 153         if (*count > 32)
 154                 *count = 32;
 155         return 0;
 156 }
 157
 158 static int
 159 vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
 160             enum v4l2_field field)
 161 {
 162         struct cx8800_fh   *fh  = q->priv_data;
 163         struct cx8800_dev  *dev = fh->dev;
 164         struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
 165         unsigned int size;
 166         int rc;
 167
 168         size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
 169         if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
 170                 return -EINVAL;
 171
 172         if (STATE_NEEDS_INIT == buf->vb.state) {
 173                 buf->vb.width  = VBI_LINE_LENGTH;
 174                 buf->vb.height = VBI_LINE_COUNT;
 175                 buf->vb.size   = size;
 176                 buf->vb.field  = V4L2_FIELD_SEQ_TB;
 177
 178                 if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
 179                         goto fail;
 180                 cx88_risc_buffer(dev->pci, &buf->risc,
 181                                  buf->vb.dma.sglist,
 182                                  0, buf->vb.width * buf->vb.height,
 183                                  buf->vb.width, 0,
 184                                  buf->vb.height);
 185         }
 186         buf->vb.state = STATE_PREPARED;
 187         return 0;
 188
 189  fail:
 190         cx88_free_buffer(q,buf);
 191         return rc;
 192 }
 193
 194 static void
 195 vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 196 {
 197         struct cx88_buffer    *buf = container_of(vb,struct cx88_buffer,vb);
 198         struct cx88_buffer    *prev;
 199         struct cx8800_fh      *fh   = vq->priv_data;
 200         struct cx8800_dev     *dev  = fh->dev;
 201         struct cx88_dmaqueue  *q    = &dev->vbiq;
 202
 203         /* add jump to stopper */
 204         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 205         buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
 206
 207         if (list_empty(&q->active)) {
 208                 list_add_tail(&buf->vb.queue,&q->active);
 209                 cx8800_start_vbi_dma(dev, q, buf);
 210                 buf->vb.state = STATE_ACTIVE;
 211                 buf->count    = q->count++;
 212                 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
 213                 dprintk(2,"[%p/%d] vbi_queue - first active\n",
 214                         buf, buf->vb.i);
 215
 216         } else {
 217                 prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue);
 218                 list_add_tail(&buf->vb.queue,&q->active);
 219                 buf->vb.state = STATE_ACTIVE;
 220                 buf->count    = q->count++;
 221                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 222                 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
 223                         buf, buf->vb.i);
 224         }
 225 }
 226
 227 static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
 228 {
 229         struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
 230
 231         cx88_free_buffer(q,buf);
 232 }
 233
 234 struct videobuf_queue_ops cx8800_vbi_qops = {
 235         .buf_setup    = vbi_setup,
 236         .buf_prepare  = vbi_prepare,
 237         .buf_queue    = vbi_queue,
 238         .buf_release  = vbi_release,
 239 };
 240
 241 /* ------------------------------------------------------------------ */
 242 /*
 243  * Local variables:
 244  * c-basic-offset: 8
 245  * End:
 246  */