diff options
Diffstat (limited to 'drivers/media/pci/cx23885/cx23885-vbi.c')
| -rw-r--r-- | drivers/media/pci/cx23885/cx23885-vbi.c | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/drivers/media/pci/cx23885/cx23885-vbi.c b/drivers/media/pci/cx23885/cx23885-vbi.c new file mode 100644 index 000000000000..a1154f035bc1 --- /dev/null +++ b/drivers/media/pci/cx23885/cx23885-vbi.c @@ -0,0 +1,295 @@ +/* + * Driver for the Conexant CX23885 PCIe bridge + * + * Copyright (c) 2007 Steven Toth <stoth@linuxtv.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> + +#include "cx23885.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; +module_param(vbi_debug, int, 0644); +MODULE_PARM_DESC(vbi_debug, "enable debug messages [vbi]"); + +#define dprintk(level, fmt, arg...)\ + do { if (vbi_debug >= level)\ + printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\ + } while (0) + +/* ------------------------------------------------------------------ */ + +#define VBI_LINE_LENGTH 1440 +#define NTSC_VBI_START_LINE 10 /* line 10 - 21 */ +#define NTSC_VBI_END_LINE 21 +#define NTSC_VBI_LINES (NTSC_VBI_END_LINE - NTSC_VBI_START_LINE + 1) + + +int cx23885_vbi_fmt(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct cx23885_fh *fh = priv; + struct cx23885_dev *dev = fh->dev; + + if (dev->tvnorm & V4L2_STD_525_60) { + /* ntsc */ + f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH; + f->fmt.vbi.sampling_rate = 27000000; + f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; + f->fmt.vbi.offset = 0; + f->fmt.vbi.flags = 0; + f->fmt.vbi.start[0] = 10; + f->fmt.vbi.count[0] = 17; + f->fmt.vbi.start[1] = 263 + 10 + 1; + f->fmt.vbi.count[1] = 17; + } else if (dev->tvnorm & 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; + } + + return 0; +} + +/* We're given the Video Interrupt status register. + * The cx23885_video_irq() func has already validated + * the potential error bits, we just need to + * deal with vbi payload and return indication if + * we actually processed any payload. + */ +int cx23885_vbi_irq(struct cx23885_dev *dev, u32 status) +{ + u32 count; + int handled = 0; + + if (status & VID_BC_MSK_VBI_RISCI1) { + dprintk(1, "%s() VID_BC_MSK_VBI_RISCI1\n", __func__); + spin_lock(&dev->slock); + count = cx_read(VID_A_GPCNT); + cx23885_video_wakeup(dev, &dev->vbiq, count); + spin_unlock(&dev->slock); + handled++; + } + + if (status & VID_BC_MSK_VBI_RISCI2) { + dprintk(1, "%s() VID_BC_MSK_VBI_RISCI2\n", __func__); + dprintk(2, "stopper vbi\n"); + spin_lock(&dev->slock); + cx23885_restart_vbi_queue(dev, &dev->vbiq); + spin_unlock(&dev->slock); + handled++; + } + + return handled; +} + +static int cx23885_start_vbi_dma(struct cx23885_dev *dev, + struct cx23885_dmaqueue *q, + struct cx23885_buffer *buf) +{ + dprintk(1, "%s()\n", __func__); + + /* setup fifo + format */ + cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02], + buf->vb.width, buf->risc.dma); + + /* reset counter */ + cx_write(VID_A_GPCNT_CTL, 3); + cx_write(VID_A_VBI_CTRL, 3); + cx_write(VBI_A_GPCNT_CTL, 3); + q->count = 1; + + /* enable irq */ + cx23885_irq_add_enable(dev, 0x01); + cx_set(VID_A_INT_MSK, 0x000022); + + /* start dma */ + cx_set(DEV_CNTRL2, (1<<5)); + cx_set(VID_A_DMA_CTL, 0x22); /* FIFO and RISC enable */ + + return 0; +} + + +int cx23885_restart_vbi_queue(struct cx23885_dev *dev, + struct cx23885_dmaqueue *q) +{ + struct cx23885_buffer *buf; + struct list_head *item; + + if (list_empty(&q->active)) + return 0; + + buf = list_entry(q->active.next, struct cx23885_buffer, vb.queue); + dprintk(2, "restart_queue [%p/%d]: restart dma\n", + buf, buf->vb.i); + cx23885_start_vbi_dma(dev, q, buf); + list_for_each(item, &q->active) { + buf = list_entry(item, struct cx23885_buffer, vb.queue); + buf->count = q->count++; + } + mod_timer(&q->timeout, jiffies + (BUFFER_TIMEOUT / 30)); + return 0; +} + +void cx23885_vbi_timeout(unsigned long data) +{ + struct cx23885_dev *dev = (struct cx23885_dev *)data; + struct cx23885_dmaqueue *q = &dev->vbiq; + struct cx23885_buffer *buf; + unsigned long flags; + + /* Stop the VBI engine */ + cx_clear(VID_A_DMA_CTL, 0x22); + + spin_lock_irqsave(&dev->slock, flags); + while (!list_empty(&q->active)) { + buf = list_entry(q->active.next, struct cx23885_buffer, + vb.queue); + list_del(&buf->vb.queue); + buf->vb.state = VIDEOBUF_ERROR; + wake_up(&buf->vb.done); + printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->name, + buf, buf->vb.i, (unsigned long)buf->risc.dma); + } + cx23885_restart_vbi_queue(dev, q); + spin_unlock_irqrestore(&dev->slock, flags); +} + +/* ------------------------------------------------------------------ */ +#define VBI_LINE_LENGTH 1440 +#define VBI_LINE_COUNT 17 + +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 cx23885_fh *fh = q->priv_data; + struct cx23885_dev *dev = fh->dev; + struct cx23885_buffer *buf = container_of(vb, + struct cx23885_buffer, vb); + struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->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 (VIDEOBUF_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; + + rc = videobuf_iolock(q, &buf->vb, NULL); + if (0 != rc) + goto fail; + cx23885_risc_vbibuffer(dev->pci, &buf->risc, + dma->sglist, + 0, buf->vb.width * buf->vb.height, + buf->vb.width, 0, + buf->vb.height); + } + buf->vb.state = VIDEOBUF_PREPARED; + return 0; + + fail: + cx23885_free_buffer(q, buf); + return rc; +} + +static void +vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) +{ + struct cx23885_buffer *buf = + container_of(vb, struct cx23885_buffer, vb); + struct cx23885_buffer *prev; + struct cx23885_fh *fh = vq->priv_data; + struct cx23885_dev *dev = fh->dev; + struct cx23885_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); + buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ + + if (list_empty(&q->active)) { + list_add_tail(&buf->vb.queue, &q->active); + cx23885_start_vbi_dma(dev, q, buf); + buf->vb.state = VIDEOBUF_ACTIVE; + buf->count = q->count++; + mod_timer(&q->timeout, jiffies + (BUFFER_TIMEOUT / 30)); + dprintk(2, "[%p/%d] vbi_queue - first active\n", + buf, buf->vb.i); + + } else { + prev = list_entry(q->active.prev, struct cx23885_buffer, + vb.queue); + list_add_tail(&buf->vb.queue, &q->active); + buf->vb.state = VIDEOBUF_ACTIVE; + buf->count = q->count++; + prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma); + prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63-32 */ + 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 cx23885_buffer *buf = + container_of(vb, struct cx23885_buffer, vb); + + cx23885_free_buffer(q, buf); +} + +struct videobuf_queue_ops cx23885_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: + */ |