From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/media/pci/saa7134/saa7134-vbi.c | 221 ++++++++++++++++++++++++++++++++ 1 file changed, 221 insertions(+) create mode 100644 drivers/media/pci/saa7134/saa7134-vbi.c (limited to 'drivers/media/pci/saa7134/saa7134-vbi.c') diff --git a/drivers/media/pci/saa7134/saa7134-vbi.c b/drivers/media/pci/saa7134/saa7134-vbi.c new file mode 100644 index 000000000..5306e549e --- /dev/null +++ b/drivers/media/pci/saa7134/saa7134-vbi.c @@ -0,0 +1,221 @@ +/* + * + * device driver for philips saa7134 based TV cards + * video4linux video interface + * + * (c) 2001,02 Gerd Knorr [SuSE Labs] + * + * 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 +#include +#include +#include + +#include "saa7134-reg.h" +#include "saa7134.h" + +/* ------------------------------------------------------------------ */ + +static unsigned int vbi_debug; +module_param(vbi_debug, int, 0644); +MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]"); + +static unsigned int vbibufs = 4; +module_param(vbibufs, int, 0444); +MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32"); + +#define dprintk(fmt, arg...) if (vbi_debug) \ + printk(KERN_DEBUG "%s/vbi: " fmt, dev->name , ## arg) + +/* ------------------------------------------------------------------ */ + +#define VBI_LINE_COUNT 17 +#define VBI_LINE_LENGTH 2048 +#define VBI_SCALE 0x200 + +static void task_init(struct saa7134_dev *dev, struct saa7134_buf *buf, + int task) +{ + struct saa7134_tvnorm *norm = dev->tvnorm; + + /* setup video scaler */ + saa_writeb(SAA7134_VBI_H_START1(task), norm->h_start & 0xff); + saa_writeb(SAA7134_VBI_H_START2(task), norm->h_start >> 8); + saa_writeb(SAA7134_VBI_H_STOP1(task), norm->h_stop & 0xff); + saa_writeb(SAA7134_VBI_H_STOP2(task), norm->h_stop >> 8); + saa_writeb(SAA7134_VBI_V_START1(task), norm->vbi_v_start_0 & 0xff); + saa_writeb(SAA7134_VBI_V_START2(task), norm->vbi_v_start_0 >> 8); + saa_writeb(SAA7134_VBI_V_STOP1(task), norm->vbi_v_stop_0 & 0xff); + saa_writeb(SAA7134_VBI_V_STOP2(task), norm->vbi_v_stop_0 >> 8); + + saa_writeb(SAA7134_VBI_H_SCALE_INC1(task), VBI_SCALE & 0xff); + saa_writeb(SAA7134_VBI_H_SCALE_INC2(task), VBI_SCALE >> 8); + saa_writeb(SAA7134_VBI_PHASE_OFFSET_LUMA(task), 0x00); + saa_writeb(SAA7134_VBI_PHASE_OFFSET_CHROMA(task), 0x00); + + saa_writeb(SAA7134_VBI_H_LEN1(task), dev->vbi_hlen & 0xff); + saa_writeb(SAA7134_VBI_H_LEN2(task), dev->vbi_hlen >> 8); + saa_writeb(SAA7134_VBI_V_LEN1(task), dev->vbi_vlen & 0xff); + saa_writeb(SAA7134_VBI_V_LEN2(task), dev->vbi_vlen >> 8); + + saa_andorb(SAA7134_DATA_PATH(task), 0xc0, 0x00); +} + +/* ------------------------------------------------------------------ */ + +static int buffer_activate(struct saa7134_dev *dev, + struct saa7134_buf *buf, + struct saa7134_buf *next) +{ + struct saa7134_dmaqueue *dmaq = buf->vb2.vb2_queue->drv_priv; + unsigned long control, base; + + dprintk("buffer_activate [%p]\n", buf); + buf->top_seen = 0; + + task_init(dev, buf, TASK_A); + task_init(dev, buf, TASK_B); + saa_writeb(SAA7134_OFMT_DATA_A, 0x06); + saa_writeb(SAA7134_OFMT_DATA_B, 0x06); + + /* DMA: setup channel 2+3 (= VBI Task A+B) */ + base = saa7134_buffer_base(buf); + control = SAA7134_RS_CONTROL_BURST_16 | + SAA7134_RS_CONTROL_ME | + (dmaq->pt.dma >> 12); + saa_writel(SAA7134_RS_BA1(2), base); + saa_writel(SAA7134_RS_BA2(2), base + dev->vbi_hlen * dev->vbi_vlen); + saa_writel(SAA7134_RS_PITCH(2), dev->vbi_hlen); + saa_writel(SAA7134_RS_CONTROL(2), control); + saa_writel(SAA7134_RS_BA1(3), base); + saa_writel(SAA7134_RS_BA2(3), base + dev->vbi_hlen * dev->vbi_vlen); + saa_writel(SAA7134_RS_PITCH(3), dev->vbi_hlen); + saa_writel(SAA7134_RS_CONTROL(3), control); + + /* start DMA */ + saa7134_set_dmabits(dev); + mod_timer(&dmaq->timeout, jiffies + BUFFER_TIMEOUT); + + return 0; +} + +static int buffer_prepare(struct vb2_buffer *vb2) +{ + struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv; + struct saa7134_dev *dev = dmaq->dev; + struct saa7134_buf *buf = container_of(vb2, struct saa7134_buf, vb2); + struct sg_table *dma = vb2_dma_sg_plane_desc(&buf->vb2, 0); + unsigned int size; + + if (dma->sgl->offset) { + pr_err("The buffer is not page-aligned\n"); + return -EINVAL; + } + size = dev->vbi_hlen * dev->vbi_vlen * 2; + if (vb2_plane_size(vb2, 0) < size) + return -EINVAL; + + vb2_set_plane_payload(vb2, 0, size); + + return saa7134_pgtable_build(dev->pci, &dmaq->pt, dma->sgl, dma->nents, + saa7134_buffer_startpage(buf)); +} + +static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt, + unsigned int *nbuffers, unsigned int *nplanes, + unsigned int sizes[], void *alloc_ctxs[]) +{ + struct saa7134_dmaqueue *dmaq = q->drv_priv; + struct saa7134_dev *dev = dmaq->dev; + unsigned int size; + + dev->vbi_vlen = dev->tvnorm->vbi_v_stop_0 - dev->tvnorm->vbi_v_start_0 + 1; + if (dev->vbi_vlen > VBI_LINE_COUNT) + dev->vbi_vlen = VBI_LINE_COUNT; + dev->vbi_hlen = VBI_LINE_LENGTH; + size = dev->vbi_hlen * dev->vbi_vlen * 2; + + *nbuffers = saa7134_buffer_count(size, *nbuffers); + *nplanes = 1; + sizes[0] = size; + alloc_ctxs[0] = dev->alloc_ctx; + return 0; +} + +static int buffer_init(struct vb2_buffer *vb2) +{ + struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv; + struct saa7134_buf *buf = container_of(vb2, struct saa7134_buf, vb2); + + dmaq->curr = NULL; + buf->activate = buffer_activate; + return 0; +} + +struct vb2_ops saa7134_vbi_qops = { + .queue_setup = queue_setup, + .buf_init = buffer_init, + .buf_prepare = buffer_prepare, + .buf_queue = saa7134_vb2_buffer_queue, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .start_streaming = saa7134_vb2_start_streaming, + .stop_streaming = saa7134_vb2_stop_streaming, +}; + +/* ------------------------------------------------------------------ */ + +int saa7134_vbi_init1(struct saa7134_dev *dev) +{ + INIT_LIST_HEAD(&dev->vbi_q.queue); + init_timer(&dev->vbi_q.timeout); + dev->vbi_q.timeout.function = saa7134_buffer_timeout; + dev->vbi_q.timeout.data = (unsigned long)(&dev->vbi_q); + dev->vbi_q.dev = dev; + + if (vbibufs < 2) + vbibufs = 2; + if (vbibufs > VIDEO_MAX_FRAME) + vbibufs = VIDEO_MAX_FRAME; + return 0; +} + +int saa7134_vbi_fini(struct saa7134_dev *dev) +{ + /* nothing */ + return 0; +} + +void saa7134_irq_vbi_done(struct saa7134_dev *dev, unsigned long status) +{ + spin_lock(&dev->slock); + if (dev->vbi_q.curr) { + /* make sure we have seen both fields */ + if ((status & 0x10) == 0x00) { + dev->vbi_q.curr->top_seen = 1; + goto done; + } + if (!dev->vbi_q.curr->top_seen) + goto done; + + saa7134_buffer_finish(dev, &dev->vbi_q, VB2_BUF_STATE_DONE); + } + saa7134_buffer_next(dev, &dev->vbi_q); + + done: + spin_unlock(&dev->slock); +} -- cgit v1.2.3-54-g00ecf