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

   1 /*
   2  * $Id: cx88-vbi.c,v 1.17 2005/06/12 04:19:19 mchehab Exp $
   3  */
   4 #include <linux/kernel.h>
   5 #include <linux/module.h>
   6 #include <linux/moduleparam.h>
   7 #include <linux/init.h>
   8 #include <linux/slab.h>
   9
  10 #include "cx88.h"
  11
  12 static unsigned int vbibufs = 4;
  13 module_param(vbibufs,int,0644);
  14 MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32");
  15
  16 static unsigned int vbi_debug = 0;
  17 module_param(vbi_debug,int,0644);
  18 MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]");
  19
  20 #define dprintk(level,fmt, arg...)      if (vbi_debug >= level) \
  21         printk(KERN_DEBUG "%s: " fmt, dev->core->name , ## arg)
  22
  23 /* ------------------------------------------------------------------ */
  24
  25 void cx8800_vbi_fmt(struct cx8800_dev *dev, struct v4l2_format *f)
  26 {
  27         memset(&f->fmt.vbi,0,sizeof(f->fmt.vbi));
  28
  29         f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
  30         f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
  31         f->fmt.vbi.offset = 244;
  32         f->fmt.vbi.count[0] = VBI_LINE_COUNT;
  33         f->fmt.vbi.count[1] = VBI_LINE_COUNT;
  34
  35         if (dev->core->tvnorm->id & V4L2_STD_525_60) {
  36                 /* ntsc */
  37                 f->fmt.vbi.sampling_rate = 28636363;
  38                 f->fmt.vbi.start[0] = 10 -1;
  39                 f->fmt.vbi.start[1] = 273 -1;
  40
  41         } else if (dev->core->tvnorm->id & V4L2_STD_625_50) {
  42                 /* pal */
  43                 f->fmt.vbi.sampling_rate = 35468950;
  44                 f->fmt.vbi.start[0] = 7 -1;
  45                 f->fmt.vbi.start[1] = 319 -1;
  46         }
  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 | 0x01);
  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, 0x000001);
  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         struct list_head *item;
 102
 103         if (list_empty(&q->active))
 104                 return 0;
 105
 106         buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
 107         dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 108                 buf, buf->vb.i);
 109         cx8800_start_vbi_dma(dev, q, buf);
 110         list_for_each(item,&q->active) {
 111                 buf = list_entry(item, struct cx88_buffer, vb.queue);
 112                 buf->count = q->count++;
 113         }
 114         mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
 115         return 0;
 116 }
 117
 118 void cx8800_vbi_timeout(unsigned long data)
 119 {
 120         struct cx8800_dev *dev = (struct cx8800_dev*)data;
 121         struct cx88_core *core = dev->core;
 122         struct cx88_dmaqueue *q = &dev->vbiq;
 123         struct cx88_buffer *buf;
 124         unsigned long flags;
 125
 126         cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH24]);
 127
 128         cx_clear(MO_VID_DMACNTRL, 0x88);
 129         cx_clear(VID_CAPTURE_CONTROL, 0x18);
 130
 131         spin_lock_irqsave(&dev->slock,flags);
 132         while (!list_empty(&q->active)) {
 133                 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
 134                 list_del(&buf->vb.queue);
 135                 buf->vb.state = STATE_ERROR;
 136                 wake_up(&buf->vb.done);
 137                 printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->core->name,
 138                        buf, buf->vb.i, (unsigned long)buf->risc.dma);
 139         }
 140         cx8800_restart_vbi_queue(dev,q);
 141         spin_unlock_irqrestore(&dev->slock,flags);
 142 }
 143
 144 /* ------------------------------------------------------------------ */
 145
 146 static int
 147 vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
 148 {
 149         *size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
 150         if (0 == *count)
 151                 *count = vbibufs;
 152         if (*count < 2)
 153                 *count = 2;
 154         if (*count > 32)
 155                 *count = 32;
 156         return 0;
 157 }
 158
 159 static int
 160 vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
 161             enum v4l2_field field)
 162 {
 163         struct cx8800_fh   *fh  = q->priv_data;
 164         struct cx8800_dev  *dev = fh->dev;
 165         struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
 166         unsigned int size;
 167         int rc;
 168
 169         size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
 170         if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
 171                 return -EINVAL;
 172
 173         if (STATE_NEEDS_INIT == buf->vb.state) {
 174                 buf->vb.width  = VBI_LINE_LENGTH;
 175                 buf->vb.height = VBI_LINE_COUNT;
 176                 buf->vb.size   = size;
 177                 buf->vb.field  = V4L2_FIELD_SEQ_TB;
 178
 179                 if (0 != (rc = videobuf_iolock(dev->pci,&buf->vb,NULL)))
 180                         goto fail;
 181                 cx88_risc_buffer(dev->pci, &buf->risc,
 182                                  buf->vb.dma.sglist,
 183                                  0, buf->vb.width * buf->vb.height,
 184                                  buf->vb.width, 0,
 185                                  buf->vb.height);
 186         }
 187         buf->vb.state = STATE_PREPARED;
 188         return 0;
 189
 190  fail:
 191         cx88_free_buffer(dev->pci,buf);
 192         return rc;
 193 }
 194
 195 static void
 196 vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 197 {
 198         struct cx88_buffer    *buf = container_of(vb,struct cx88_buffer,vb);
 199         struct cx88_buffer    *prev;
 200         struct cx8800_fh      *fh   = vq->priv_data;
 201         struct cx8800_dev     *dev  = fh->dev;
 202         struct cx88_dmaqueue  *q    = &dev->vbiq;
 203
 204         /* add jump to stopper */
 205         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 206         buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
 207
 208         if (list_empty(&q->active)) {
 209                 list_add_tail(&buf->vb.queue,&q->active);
 210                 cx8800_start_vbi_dma(dev, q, buf);
 211                 buf->vb.state = STATE_ACTIVE;
 212                 buf->count    = q->count++;
 213                 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
 214                 dprintk(2,"[%p/%d] vbi_queue - first active\n",
 215                         buf, buf->vb.i);
 216
 217         } else {
 218                 prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue);
 219                 list_add_tail(&buf->vb.queue,&q->active);
 220                 buf->vb.state = STATE_ACTIVE;
 221                 buf->count    = q->count++;
 222                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 223                 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
 224                         buf, buf->vb.i);
 225         }
 226 }
 227
 228 static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
 229 {
 230         struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb);
 231         struct cx8800_fh   *fh  = q->priv_data;
 232
 233         cx88_free_buffer(fh->dev->pci,buf);
 234 }
 235
 236 struct videobuf_queue_ops cx8800_vbi_qops = {
 237         .buf_setup    = vbi_setup,
 238         .buf_prepare  = vbi_prepare,
 239         .buf_queue    = vbi_queue,
 240         .buf_release  = vbi_release,
 241 };
 242
 243 /* ------------------------------------------------------------------ */
 244 /*
 245  * Local variables:
 246  * c-basic-offset: 8
 247  * End:
 248  */