/* * * device driver for philips saa7134 based TV cards * video4linux video interface * * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [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 <linux/init.h> #include <linux/list.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/slab.h> #include "saa7134-reg.h" #include "saa7134.h" /* ------------------------------------------------------------------ */ static unsigned int vbi_debug = 0; 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 16 #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), buf->vb.width & 0xff); saa_writeb(SAA7134_VBI_H_LEN2(task), buf->vb.width >> 8); saa_writeb(SAA7134_VBI_V_LEN1(task), buf->vb.height & 0xff); saa_writeb(SAA7134_VBI_V_LEN2(task), buf->vb.height >> 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) { unsigned long control,base; dprintk("buffer_activate [%p]\n",buf); buf->vb.state = STATE_ACTIVE; 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 | (buf->pt->dma >> 12); saa_writel(SAA7134_RS_BA1(2),base); saa_writel(SAA7134_RS_BA2(2),base + buf->vb.size/2); saa_writel(SAA7134_RS_PITCH(2),buf->vb.width); saa_writel(SAA7134_RS_CONTROL(2),control); saa_writel(SAA7134_RS_BA1(3),base); saa_writel(SAA7134_RS_BA2(3),base + buf->vb.size/2); saa_writel(SAA7134_RS_PITCH(3),buf->vb.width); saa_writel(SAA7134_RS_CONTROL(3),control); /* start DMA */ saa7134_set_dmabits(dev); mod_timer(&dev->vbi_q.timeout, jiffies+BUFFER_TIMEOUT); return 0; } static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb, enum v4l2_field field) { struct saa7134_fh *fh = q->priv_data; struct saa7134_dev *dev = fh->dev; struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); struct saa7134_tvnorm *norm = dev->tvnorm; unsigned int lines, llength, size; int err; lines = norm->vbi_v_stop_0 - norm->vbi_v_start_0 +1; if (lines > VBI_LINE_COUNT) lines = VBI_LINE_COUNT; llength = VBI_LINE_LENGTH; size = lines * llength * 2; if (0 != buf->vb.baddr && buf->vb.bsize < size) return -EINVAL; if (buf->vb.size != size) saa7134_dma_free(q,buf); if (STATE_NEEDS_INIT == buf->vb.state) { struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb); buf->vb.width = llength; buf->vb.height = lines; buf->vb.size = size; buf->pt = &fh->pt_vbi; err = videobuf_iolock(q,&buf->vb,NULL); if (err) goto oops; err = saa7134_pgtable_build(dev->pci,buf->pt, dma->sglist, dma->sglen, saa7134_buffer_startpage(buf)); if (err) goto oops; } buf->vb.state = STATE_PREPARED; buf->activate = buffer_activate; buf->vb.field = field; return 0; oops: saa7134_dma_free(q,buf); return err; } static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) { struct saa7134_fh *fh = q->priv_data; struct saa7134_dev *dev = fh->dev; int llength,lines; lines = dev->tvnorm->vbi_v_stop_0 - dev->tvnorm->vbi_v_start_0 +1; llength = VBI_LINE_LENGTH; *size = lines * llength * 2; if (0 == *count) *count = vbibufs; *count = saa7134_buffer_count(*size,*count); return 0; } static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) { struct saa7134_fh *fh = q->priv_data; struct saa7134_dev *dev = fh->dev; struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); saa7134_buffer_queue(dev,&dev->vbi_q,buf); } static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb) { struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); saa7134_dma_free(q,buf); } struct videobuf_queue_ops saa7134_vbi_qops = { .buf_setup = buffer_setup, .buf_prepare = buffer_prepare, .buf_queue = buffer_queue, .buf_release = buffer_release, }; /* ------------------------------------------------------------------ */ 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) { dev->vbi_fieldcount++; /* 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; dev->vbi_q.curr->vb.field_count = dev->vbi_fieldcount; saa7134_buffer_finish(dev,&dev->vbi_q,STATE_DONE); } saa7134_buffer_next(dev,&dev->vbi_q); done: spin_unlock(&dev->slock); } /* ----------------------------------------------------------- */ /* * Local variables: * c-basic-offset: 8 * End: */