/* * * 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 "saa7134.h" #include "saa7134-reg.h" #include #include #include #include /* ------------------------------------------------------------------ */ 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 vbi_dbg(fmt, arg...) do { \ if (vbi_debug) \ printk(KERN_DEBUG pr_fmt("vbi: " fmt), ## arg); \ } while (0) /* ------------------------------------------------------------------ */ #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_buf.vb2_queue->drv_priv; unsigned long control, base; vbi_dbg("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 vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb2); struct saa7134_buf *buf = container_of(vbuf, struct saa7134_buf, vb2); struct sg_table *dma = vb2_dma_sg_plane_desc(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 vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb2); struct saa7134_buf *buf = container_of(vbuf, 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); }