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,
 111                            unsigned int *num_buffers, unsigned int *num_planes,
 112                            unsigned int sizes[], struct device *alloc_devs[])
 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         return 0;
 122 }
 123
 124
 125 static int buffer_prepare(struct vb2_buffer *vb)
 126 {
 127         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 128         struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
 129         struct cx88_buffer *buf = container_of(vbuf, struct cx88_buffer, vb);
 130         struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
 131         unsigned int lines;
 132         unsigned int size;
 133
 134         if (dev->core->tvnorm & V4L2_STD_525_60)
 135                 lines = VBI_LINE_NTSC_COUNT;
 136         else
 137                 lines = VBI_LINE_PAL_COUNT;
 138         size = lines * VBI_LINE_LENGTH * 2;
 139         if (vb2_plane_size(vb, 0) < size)
 140                 return -EINVAL;
 141         vb2_set_plane_payload(vb, 0, size);
 142
 143         return cx88_risc_buffer(dev->pci, &buf->risc, sgt->sgl,
 144                                 0, VBI_LINE_LENGTH * lines,
 145                                 VBI_LINE_LENGTH, 0,
 146                                 lines);
 147 }
 148
 149 static void buffer_finish(struct vb2_buffer *vb)
 150 {
 151         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 152         struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
 153         struct cx88_buffer *buf = container_of(vbuf, struct cx88_buffer, vb);
 154         struct cx88_riscmem *risc = &buf->risc;
 155
 156         if (risc->cpu)
 157                 pci_free_consistent(dev->pci, risc->size, risc->cpu, risc->dma);
 158         memset(risc, 0, sizeof(*risc));
 159 }
 160
 161 static void buffer_queue(struct vb2_buffer *vb)
 162 {
 163         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 164         struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
 165         struct cx88_buffer    *buf = container_of(vbuf, struct cx88_buffer, vb);
 166         struct cx88_buffer    *prev;
 167         struct cx88_dmaqueue  *q    = &dev->vbiq;
 168
 169         /* add jump to start */
 170         buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
 171         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
 172         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);
 173
 174         if (list_empty(&q->active)) {
 175                 list_add_tail(&buf->list, &q->active);
 176                 cx8800_start_vbi_dma(dev, q, buf);
 177                 dprintk(2,"[%p/%d] vbi_queue - first active\n",
 178                         buf, buf->vb.vb2_buf.index);
 179
 180         } else {
 181                 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
 182                 prev = list_entry(q->active.prev, struct cx88_buffer, list);
 183                 list_add_tail(&buf->list, &q->active);
 184                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 185                 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
 186                         buf, buf->vb.vb2_buf.index);
 187         }
 188 }
 189
 190 static int start_streaming(struct vb2_queue *q, unsigned int count)
 191 {
 192         struct cx8800_dev *dev = q->drv_priv;
 193         struct cx88_dmaqueue *dmaq = &dev->vbiq;
 194         struct cx88_buffer *buf = list_entry(dmaq->active.next,
 195                         struct cx88_buffer, list);
 196
 197         cx8800_start_vbi_dma(dev, dmaq, buf);
 198         return 0;
 199 }
 200
 201 static void stop_streaming(struct vb2_queue *q)
 202 {
 203         struct cx8800_dev *dev = q->drv_priv;
 204         struct cx88_core *core = dev->core;
 205         struct cx88_dmaqueue *dmaq = &dev->vbiq;
 206         unsigned long flags;
 207
 208         cx_clear(MO_VID_DMACNTRL, 0x11);
 209         cx_clear(VID_CAPTURE_CONTROL, 0x06);
 210         cx8800_stop_vbi_dma(dev);
 211         spin_lock_irqsave(&dev->slock, flags);
 212         while (!list_empty(&dmaq->active)) {
 213                 struct cx88_buffer *buf = list_entry(dmaq->active.next,
 214                         struct cx88_buffer, list);
 215
 216                 list_del(&buf->list);
 217                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 218         }
 219         spin_unlock_irqrestore(&dev->slock, flags);
 220 }
 221
 222 const struct vb2_ops cx8800_vbi_qops = {
 223         .queue_setup    = queue_setup,
 224         .buf_prepare  = buffer_prepare,
 225         .buf_finish = buffer_finish,
 226         .buf_queue    = buffer_queue,
 227         .wait_prepare = vb2_ops_wait_prepare,
 228         .wait_finish = vb2_ops_wait_finish,
 229         .start_streaming = start_streaming,
 230         .stop_streaming = stop_streaming,
 231 };