diff options
Diffstat (limited to 'drivers/media/pci/saa7134/saa7134-ts.c')
| -rw-r--r-- | drivers/media/pci/saa7134/saa7134-ts.c | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/drivers/media/pci/saa7134/saa7134-ts.c b/drivers/media/pci/saa7134/saa7134-ts.c new file mode 100644 index 000000000..437dbe5e7 --- /dev/null +++ b/drivers/media/pci/saa7134/saa7134-ts.c @@ -0,0 +1,328 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * + * device driver for philips saa7134 based TV cards + * video4linux video interface + * + * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs] + */ + +#include "saa7134.h" +#include "saa7134-reg.h" + +#include <linux/init.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/delay.h> + +/* ------------------------------------------------------------------ */ + +static unsigned int ts_debug; +module_param(ts_debug, int, 0644); +MODULE_PARM_DESC(ts_debug,"enable debug messages [ts]"); + +#define ts_dbg(fmt, arg...) do { \ + if (ts_debug) \ + printk(KERN_DEBUG pr_fmt("ts: " fmt), ## arg); \ + } while (0) + +/* ------------------------------------------------------------------ */ +static int buffer_activate(struct saa7134_dev *dev, + struct saa7134_buf *buf, + struct saa7134_buf *next) +{ + + ts_dbg("buffer_activate [%p]", buf); + buf->top_seen = 0; + + if (!dev->ts_started) + dev->ts_field = V4L2_FIELD_TOP; + + if (NULL == next) + next = buf; + if (V4L2_FIELD_TOP == dev->ts_field) { + ts_dbg("- [top] buf=%p next=%p\n", buf, next); + saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(buf)); + saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(next)); + dev->ts_field = V4L2_FIELD_BOTTOM; + } else { + ts_dbg("- [bottom] buf=%p next=%p\n", buf, next); + saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(next)); + saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(buf)); + dev->ts_field = V4L2_FIELD_TOP; + } + + /* start DMA */ + saa7134_set_dmabits(dev); + + mod_timer(&dev->ts_q.timeout, jiffies+TS_BUFFER_TIMEOUT); + + if (!dev->ts_started) + saa7134_ts_start(dev); + + return 0; +} + +int saa7134_ts_buffer_init(struct vb2_buffer *vb2) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb2); + struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv; + struct saa7134_buf *buf = container_of(vbuf, struct saa7134_buf, vb2); + + dmaq->curr = NULL; + buf->activate = buffer_activate; + + return 0; +} +EXPORT_SYMBOL_GPL(saa7134_ts_buffer_init); + +int saa7134_ts_buffer_prepare(struct vb2_buffer *vb2) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb2); + struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv; + struct saa7134_dev *dev = dmaq->dev; + struct saa7134_buf *buf = container_of(vbuf, struct saa7134_buf, vb2); + struct sg_table *dma = vb2_dma_sg_plane_desc(vb2, 0); + unsigned int lines, llength, size; + + ts_dbg("buffer_prepare [%p]\n", buf); + + llength = TS_PACKET_SIZE; + lines = dev->ts.nr_packets; + + size = lines * llength; + if (vb2_plane_size(vb2, 0) < size) + return -EINVAL; + + vb2_set_plane_payload(vb2, 0, size); + vbuf->field = dev->field; + + return saa7134_pgtable_build(dev->pci, &dmaq->pt, dma->sgl, dma->nents, + saa7134_buffer_startpage(buf)); +} +EXPORT_SYMBOL_GPL(saa7134_ts_buffer_prepare); + +int saa7134_ts_queue_setup(struct vb2_queue *q, + unsigned int *nbuffers, unsigned int *nplanes, + unsigned int sizes[], struct device *alloc_devs[]) +{ + struct saa7134_dmaqueue *dmaq = q->drv_priv; + struct saa7134_dev *dev = dmaq->dev; + int size = TS_PACKET_SIZE * dev->ts.nr_packets; + + if (0 == *nbuffers) + *nbuffers = dev->ts.nr_bufs; + *nbuffers = saa7134_buffer_count(size, *nbuffers); + if (*nbuffers < 3) + *nbuffers = 3; + *nplanes = 1; + sizes[0] = size; + return 0; +} +EXPORT_SYMBOL_GPL(saa7134_ts_queue_setup); + +int saa7134_ts_start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct saa7134_dmaqueue *dmaq = vq->drv_priv; + struct saa7134_dev *dev = dmaq->dev; + + /* + * Planar video capture and TS share the same DMA channel, + * so only one can be active at a time. + */ + if (vb2_is_busy(&dev->video_vbq) && dev->fmt->planar) { + struct saa7134_buf *buf, *tmp; + + list_for_each_entry_safe(buf, tmp, &dmaq->queue, entry) { + list_del(&buf->entry); + vb2_buffer_done(&buf->vb2.vb2_buf, + VB2_BUF_STATE_QUEUED); + } + if (dmaq->curr) { + vb2_buffer_done(&dmaq->curr->vb2.vb2_buf, + VB2_BUF_STATE_QUEUED); + dmaq->curr = NULL; + } + return -EBUSY; + } + dmaq->seq_nr = 0; + return 0; +} +EXPORT_SYMBOL_GPL(saa7134_ts_start_streaming); + +void saa7134_ts_stop_streaming(struct vb2_queue *vq) +{ + struct saa7134_dmaqueue *dmaq = vq->drv_priv; + struct saa7134_dev *dev = dmaq->dev; + + saa7134_ts_stop(dev); + saa7134_stop_streaming(dev, dmaq); +} +EXPORT_SYMBOL_GPL(saa7134_ts_stop_streaming); + +struct vb2_ops saa7134_ts_qops = { + .queue_setup = saa7134_ts_queue_setup, + .buf_init = saa7134_ts_buffer_init, + .buf_prepare = saa7134_ts_buffer_prepare, + .buf_queue = saa7134_vb2_buffer_queue, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .stop_streaming = saa7134_ts_stop_streaming, +}; +EXPORT_SYMBOL_GPL(saa7134_ts_qops); + +/* ----------------------------------------------------------- */ +/* exported stuff */ + +static unsigned int tsbufs = 8; +module_param(tsbufs, int, 0444); +MODULE_PARM_DESC(tsbufs, "number of ts buffers for read/write IO, range 2-32"); + +static unsigned int ts_nr_packets = 64; +module_param(ts_nr_packets, int, 0444); +MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)"); + +int saa7134_ts_init_hw(struct saa7134_dev *dev) +{ + /* deactivate TS softreset */ + saa_writeb(SAA7134_TS_SERIAL1, 0x00); + /* TSSOP high active, TSVAL high active, TSLOCK ignored */ + saa_writeb(SAA7134_TS_PARALLEL, 0x6c); + saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1)); + saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff)); + saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff)); + /* TSNOPIT=0, TSCOLAP=0 */ + saa_writeb(SAA7134_TS_DMA2, + ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00)); + + return 0; +} + +int saa7134_ts_init1(struct saa7134_dev *dev) +{ + /* sanitycheck insmod options */ + if (tsbufs < 2) + tsbufs = 2; + if (tsbufs > VIDEO_MAX_FRAME) + tsbufs = VIDEO_MAX_FRAME; + if (ts_nr_packets < 4) + ts_nr_packets = 4; + if (ts_nr_packets > 312) + ts_nr_packets = 312; + dev->ts.nr_bufs = tsbufs; + dev->ts.nr_packets = ts_nr_packets; + + INIT_LIST_HEAD(&dev->ts_q.queue); + timer_setup(&dev->ts_q.timeout, saa7134_buffer_timeout, 0); + dev->ts_q.dev = dev; + dev->ts_q.need_two = 1; + dev->ts_started = 0; + saa7134_pgtable_alloc(dev->pci, &dev->ts_q.pt); + + /* init TS hw */ + saa7134_ts_init_hw(dev); + + return 0; +} + +/* Function for stop TS */ +int saa7134_ts_stop(struct saa7134_dev *dev) +{ + ts_dbg("TS stop\n"); + + if (!dev->ts_started) + return 0; + + /* Stop TS stream */ + switch (saa7134_boards[dev->board].ts_type) { + case SAA7134_MPEG_TS_PARALLEL: + saa_writeb(SAA7134_TS_PARALLEL, 0x6c); + dev->ts_started = 0; + break; + case SAA7134_MPEG_TS_SERIAL: + saa_writeb(SAA7134_TS_SERIAL0, 0x40); + dev->ts_started = 0; + break; + } + return 0; +} + +/* Function for start TS */ +int saa7134_ts_start(struct saa7134_dev *dev) +{ + ts_dbg("TS start\n"); + + if (WARN_ON(dev->ts_started)) + return 0; + + /* dma: setup channel 5 (= TS) */ + saa_writeb(SAA7134_TS_DMA0, (dev->ts.nr_packets - 1) & 0xff); + saa_writeb(SAA7134_TS_DMA1, + ((dev->ts.nr_packets - 1) >> 8) & 0xff); + /* TSNOPIT=0, TSCOLAP=0 */ + saa_writeb(SAA7134_TS_DMA2, + (((dev->ts.nr_packets - 1) >> 16) & 0x3f) | 0x00); + saa_writel(SAA7134_RS_PITCH(5), TS_PACKET_SIZE); + saa_writel(SAA7134_RS_CONTROL(5), SAA7134_RS_CONTROL_BURST_16 | + SAA7134_RS_CONTROL_ME | + (dev->ts_q.pt.dma >> 12)); + + /* reset hardware TS buffers */ + saa_writeb(SAA7134_TS_SERIAL1, 0x00); + saa_writeb(SAA7134_TS_SERIAL1, 0x03); + saa_writeb(SAA7134_TS_SERIAL1, 0x00); + saa_writeb(SAA7134_TS_SERIAL1, 0x01); + + /* TS clock non-inverted */ + saa_writeb(SAA7134_TS_SERIAL1, 0x00); + + /* Start TS stream */ + switch (saa7134_boards[dev->board].ts_type) { + case SAA7134_MPEG_TS_PARALLEL: + saa_writeb(SAA7134_TS_SERIAL0, 0x40); + saa_writeb(SAA7134_TS_PARALLEL, 0xec | + (saa7134_boards[dev->board].ts_force_val << 4)); + break; + case SAA7134_MPEG_TS_SERIAL: + saa_writeb(SAA7134_TS_SERIAL0, 0xd8); + saa_writeb(SAA7134_TS_PARALLEL, 0x6c | + (saa7134_boards[dev->board].ts_force_val << 4)); + saa_writeb(SAA7134_TS_PARALLEL_SERIAL, 0xbc); + saa_writeb(SAA7134_TS_SERIAL1, 0x02); + break; + } + + dev->ts_started = 1; + + return 0; +} + +int saa7134_ts_fini(struct saa7134_dev *dev) +{ + del_timer_sync(&dev->ts_q.timeout); + saa7134_pgtable_free(dev->pci, &dev->ts_q.pt); + return 0; +} + +void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status) +{ + enum v4l2_field field; + + spin_lock(&dev->slock); + if (dev->ts_q.curr) { + field = dev->ts_field; + if (field != V4L2_FIELD_TOP) { + if ((status & 0x100000) != 0x000000) + goto done; + } else { + if ((status & 0x100000) != 0x100000) + goto done; + } + saa7134_buffer_finish(dev, &dev->ts_q, VB2_BUF_STATE_DONE); + } + saa7134_buffer_next(dev,&dev->ts_q); + + done: + spin_unlock(&dev->slock); +} |