From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/media/video/cx88/cx88-vbi.c | 248 ++++++++++++++++++++++++++++++++++++ 1 file changed, 248 insertions(+) create mode 100644 drivers/media/video/cx88/cx88-vbi.c (limited to 'drivers/media/video/cx88/cx88-vbi.c') diff --git a/drivers/media/video/cx88/cx88-vbi.c b/drivers/media/video/cx88/cx88-vbi.c new file mode 100644 index 000000000000..471e508b0746 --- /dev/null +++ b/drivers/media/video/cx88/cx88-vbi.c @@ -0,0 +1,248 @@ +/* + * $Id: cx88-vbi.c,v 1.16 2004/12/10 12:33:39 kraxel Exp $ + */ +#include +#include +#include +#include +#include + +#include "cx88.h" + +static unsigned int vbibufs = 4; +module_param(vbibufs,int,0644); +MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32"); + +static unsigned int vbi_debug = 0; +module_param(vbi_debug,int,0644); +MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]"); + +#define dprintk(level,fmt, arg...) if (vbi_debug >= level) \ + printk(KERN_DEBUG "%s: " fmt, dev->core->name , ## arg) + +/* ------------------------------------------------------------------ */ + +void cx8800_vbi_fmt(struct cx8800_dev *dev, struct v4l2_format *f) +{ + memset(&f->fmt.vbi,0,sizeof(f->fmt.vbi)); + + f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH; + f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; + f->fmt.vbi.offset = 244; + f->fmt.vbi.count[0] = VBI_LINE_COUNT; + f->fmt.vbi.count[1] = VBI_LINE_COUNT; + + if (dev->core->tvnorm->id & V4L2_STD_525_60) { + /* ntsc */ + f->fmt.vbi.sampling_rate = 28636363; + f->fmt.vbi.start[0] = 10 -1; + f->fmt.vbi.start[1] = 273 -1; + + } else if (dev->core->tvnorm->id & V4L2_STD_625_50) { + /* pal */ + f->fmt.vbi.sampling_rate = 35468950; + f->fmt.vbi.start[0] = 7 -1; + f->fmt.vbi.start[1] = 319 -1; + } +} + +int cx8800_start_vbi_dma(struct cx8800_dev *dev, + struct cx88_dmaqueue *q, + struct cx88_buffer *buf) +{ + struct cx88_core *core = dev->core; + + /* setup fifo + format */ + cx88_sram_channel_setup(dev->core, &cx88_sram_channels[SRAM_CH24], + buf->vb.width, buf->risc.dma); + + cx_write(MO_VBOS_CONTROL, ( (1 << 18) | // comb filter delay fixup + (1 << 15) | // enable vbi capture + (1 << 11) )); + + /* reset counter */ + cx_write(MO_VBI_GPCNTRL, GP_COUNT_CONTROL_RESET); + q->count = 1; + + /* enable irqs */ + cx_set(MO_PCI_INTMSK, core->pci_irqmask | 0x01); + cx_set(MO_VID_INTMSK, 0x0f0088); + + /* enable capture */ + cx_set(VID_CAPTURE_CONTROL,0x18); + + /* start dma */ + cx_set(MO_DEV_CNTRL2, (1<<5)); + cx_set(MO_VID_DMACNTRL, 0x88); + + return 0; +} + +int cx8800_stop_vbi_dma(struct cx8800_dev *dev) +{ + struct cx88_core *core = dev->core; + + /* stop dma */ + cx_clear(MO_VID_DMACNTRL, 0x88); + + /* disable capture */ + cx_clear(VID_CAPTURE_CONTROL,0x18); + + /* disable irqs */ + cx_clear(MO_PCI_INTMSK, 0x000001); + cx_clear(MO_VID_INTMSK, 0x0f0088); + return 0; +} + +int cx8800_restart_vbi_queue(struct cx8800_dev *dev, + struct cx88_dmaqueue *q) +{ + struct cx88_buffer *buf; + struct list_head *item; + + if (list_empty(&q->active)) + return 0; + + buf = list_entry(q->active.next, struct cx88_buffer, vb.queue); + dprintk(2,"restart_queue [%p/%d]: restart dma\n", + buf, buf->vb.i); + cx8800_start_vbi_dma(dev, q, buf); + list_for_each(item,&q->active) { + buf = list_entry(item, struct cx88_buffer, vb.queue); + buf->count = q->count++; + } + mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT); + return 0; +} + +void cx8800_vbi_timeout(unsigned long data) +{ + struct cx8800_dev *dev = (struct cx8800_dev*)data; + struct cx88_core *core = dev->core; + struct cx88_dmaqueue *q = &dev->vbiq; + struct cx88_buffer *buf; + unsigned long flags; + + cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH24]); + + cx_clear(MO_VID_DMACNTRL, 0x88); + cx_clear(VID_CAPTURE_CONTROL, 0x18); + + spin_lock_irqsave(&dev->slock,flags); + while (!list_empty(&q->active)) { + buf = list_entry(q->active.next, struct cx88_buffer, vb.queue); + list_del(&buf->vb.queue); + buf->vb.state = STATE_ERROR; + wake_up(&buf->vb.done); + printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->core->name, + buf, buf->vb.i, (unsigned long)buf->risc.dma); + } + cx8800_restart_vbi_queue(dev,q); + spin_unlock_irqrestore(&dev->slock,flags); +} + +/* ------------------------------------------------------------------ */ + +static int +vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) +{ + *size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2; + if (0 == *count) + *count = vbibufs; + if (*count < 2) + *count = 2; + if (*count > 32) + *count = 32; + return 0; +} + +static int +vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb, + enum v4l2_field field) +{ + struct cx8800_fh *fh = q->priv_data; + struct cx8800_dev *dev = fh->dev; + struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb); + unsigned int size; + int rc; + + size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2; + if (0 != buf->vb.baddr && buf->vb.bsize < size) + return -EINVAL; + + if (STATE_NEEDS_INIT == buf->vb.state) { + buf->vb.width = VBI_LINE_LENGTH; + buf->vb.height = VBI_LINE_COUNT; + buf->vb.size = size; + buf->vb.field = V4L2_FIELD_SEQ_TB; + + if (0 != (rc = videobuf_iolock(dev->pci,&buf->vb,NULL))) + goto fail; + cx88_risc_buffer(dev->pci, &buf->risc, + buf->vb.dma.sglist, + 0, buf->vb.width * buf->vb.height, + buf->vb.width, 0, + buf->vb.height); + } + buf->vb.state = STATE_PREPARED; + return 0; + + fail: + cx88_free_buffer(dev->pci,buf); + return rc; +} + +static void +vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) +{ + struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb); + struct cx88_buffer *prev; + struct cx8800_fh *fh = vq->priv_data; + struct cx8800_dev *dev = fh->dev; + struct cx88_dmaqueue *q = &dev->vbiq; + + /* add jump to stopper */ + buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC); + buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma); + + if (list_empty(&q->active)) { + list_add_tail(&buf->vb.queue,&q->active); + cx8800_start_vbi_dma(dev, q, buf); + buf->vb.state = STATE_ACTIVE; + buf->count = q->count++; + mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT); + dprintk(2,"[%p/%d] vbi_queue - first active\n", + buf, buf->vb.i); + + } else { + prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue); + list_add_tail(&buf->vb.queue,&q->active); + buf->vb.state = STATE_ACTIVE; + buf->count = q->count++; + prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma); + dprintk(2,"[%p/%d] buffer_queue - append to active\n", + buf, buf->vb.i); + } +} + +static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb) +{ + struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb); + struct cx8800_fh *fh = q->priv_data; + + cx88_free_buffer(fh->dev->pci,buf); +} + +struct videobuf_queue_ops cx8800_vbi_qops = { + .buf_setup = vbi_setup, + .buf_prepare = vbi_prepare, + .buf_queue = vbi_queue, + .buf_release = vbi_release, +}; + +/* ------------------------------------------------------------------ */ +/* + * Local variables: + * c-basic-offset: 8 + * End: + */ -- cgit v1.2.3