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 };