From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- drivers/media/pci/cx88/cx88-vbi.c | 235 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 235 insertions(+) create mode 100644 drivers/media/pci/cx88/cx88-vbi.c (limited to 'drivers/media/pci/cx88/cx88-vbi.c') diff --git a/drivers/media/pci/cx88/cx88-vbi.c b/drivers/media/pci/cx88/cx88-vbi.c new file mode 100644 index 000000000..58489ea0c --- /dev/null +++ b/drivers/media/pci/cx88/cx88-vbi.c @@ -0,0 +1,235 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + */ + +#include "cx88.h" + +#include +#include +#include + +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 pr_fmt("%s: vbi:" fmt), \ + __func__, ##arg); \ +} while (0) + +/* ------------------------------------------------------------------ */ + +int cx8800_vbi_fmt(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct cx8800_dev *dev = video_drvdata(file); + + f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH; + f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; + f->fmt.vbi.offset = 244; + + if (dev->core->tvnorm & V4L2_STD_525_60) { + /* ntsc */ + f->fmt.vbi.sampling_rate = 28636363; + f->fmt.vbi.start[0] = 10; + f->fmt.vbi.start[1] = 273; + f->fmt.vbi.count[0] = VBI_LINE_NTSC_COUNT; + f->fmt.vbi.count[1] = VBI_LINE_NTSC_COUNT; + + } else if (dev->core->tvnorm & V4L2_STD_625_50) { + /* pal */ + f->fmt.vbi.sampling_rate = 35468950; + f->fmt.vbi.start[0] = V4L2_VBI_ITU_625_F1_START + 5; + f->fmt.vbi.start[1] = V4L2_VBI_ITU_625_F2_START + 5; + f->fmt.vbi.count[0] = VBI_LINE_PAL_COUNT; + f->fmt.vbi.count[1] = VBI_LINE_PAL_COUNT; + } + return 0; +} + +static 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], + VBI_LINE_LENGTH, 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 = 0; + + /* enable irqs */ + cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_VIDINT); + 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; +} + +void 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, PCI_INT_VIDINT); + cx_clear(MO_VID_INTMSK, 0x0f0088); +} + +int cx8800_restart_vbi_queue(struct cx8800_dev *dev, + struct cx88_dmaqueue *q) +{ + struct cx88_buffer *buf; + + if (list_empty(&q->active)) + return 0; + + buf = list_entry(q->active.next, struct cx88_buffer, list); + dprintk(2, "restart_queue [%p/%d]: restart dma\n", + buf, buf->vb.vb2_buf.index); + cx8800_start_vbi_dma(dev, q, buf); + return 0; +} + +/* ------------------------------------------------------------------ */ + +static int queue_setup(struct vb2_queue *q, + unsigned int *num_buffers, unsigned int *num_planes, + unsigned int sizes[], struct device *alloc_devs[]) +{ + struct cx8800_dev *dev = q->drv_priv; + + *num_planes = 1; + if (dev->core->tvnorm & V4L2_STD_525_60) + sizes[0] = VBI_LINE_NTSC_COUNT * VBI_LINE_LENGTH * 2; + else + sizes[0] = VBI_LINE_PAL_COUNT * VBI_LINE_LENGTH * 2; + return 0; +} + +static int buffer_prepare(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct cx8800_dev *dev = vb->vb2_queue->drv_priv; + struct cx88_buffer *buf = container_of(vbuf, struct cx88_buffer, vb); + struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0); + unsigned int lines; + unsigned int size; + + if (dev->core->tvnorm & V4L2_STD_525_60) + lines = VBI_LINE_NTSC_COUNT; + else + lines = VBI_LINE_PAL_COUNT; + size = lines * VBI_LINE_LENGTH * 2; + if (vb2_plane_size(vb, 0) < size) + return -EINVAL; + vb2_set_plane_payload(vb, 0, size); + + cx88_risc_buffer(dev->pci, &buf->risc, sgt->sgl, + 0, VBI_LINE_LENGTH * lines, + VBI_LINE_LENGTH, 0, + lines); + return 0; +} + +static void buffer_finish(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct cx8800_dev *dev = vb->vb2_queue->drv_priv; + struct cx88_buffer *buf = container_of(vbuf, struct cx88_buffer, vb); + struct cx88_riscmem *risc = &buf->risc; + + if (risc->cpu) + pci_free_consistent(dev->pci, risc->size, risc->cpu, risc->dma); + memset(risc, 0, sizeof(*risc)); +} + +static void buffer_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct cx8800_dev *dev = vb->vb2_queue->drv_priv; + struct cx88_buffer *buf = container_of(vbuf, struct cx88_buffer, vb); + struct cx88_buffer *prev; + struct cx88_dmaqueue *q = &dev->vbiq; + + /* add jump to start */ + buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8); + buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC); + buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8); + + if (list_empty(&q->active)) { + list_add_tail(&buf->list, &q->active); + dprintk(2, "[%p/%d] vbi_queue - first active\n", + buf, buf->vb.vb2_buf.index); + + } else { + buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1); + prev = list_entry(q->active.prev, struct cx88_buffer, list); + list_add_tail(&buf->list, &q->active); + prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma); + dprintk(2, "[%p/%d] buffer_queue - append to active\n", + buf, buf->vb.vb2_buf.index); + } +} + +static int start_streaming(struct vb2_queue *q, unsigned int count) +{ + struct cx8800_dev *dev = q->drv_priv; + struct cx88_dmaqueue *dmaq = &dev->vbiq; + struct cx88_buffer *buf = list_entry(dmaq->active.next, + struct cx88_buffer, list); + + cx8800_start_vbi_dma(dev, dmaq, buf); + return 0; +} + +static void stop_streaming(struct vb2_queue *q) +{ + struct cx8800_dev *dev = q->drv_priv; + struct cx88_core *core = dev->core; + struct cx88_dmaqueue *dmaq = &dev->vbiq; + unsigned long flags; + + cx_clear(MO_VID_DMACNTRL, 0x11); + cx_clear(VID_CAPTURE_CONTROL, 0x06); + cx8800_stop_vbi_dma(dev); + spin_lock_irqsave(&dev->slock, flags); + while (!list_empty(&dmaq->active)) { + struct cx88_buffer *buf = list_entry(dmaq->active.next, + struct cx88_buffer, list); + + list_del(&buf->list); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + } + spin_unlock_irqrestore(&dev->slock, flags); +} + +const struct vb2_ops cx8800_vbi_qops = { + .queue_setup = queue_setup, + .buf_prepare = buffer_prepare, + .buf_finish = buffer_finish, + .buf_queue = buffer_queue, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .start_streaming = start_streaming, + .stop_streaming = stop_streaming, +}; -- cgit v1.2.3