blob: a7047e548245c6d08fc3a41c771a69684686a36e [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <media/drv-intf/saa7146_vv.h>
#include <linux/module.h>
/****************************************************************************/
/* resource management functions, shamelessly stolen from saa7134 driver */
int saa7146_res_get(struct saa7146_dev *dev, unsigned int bit)
{
struct saa7146_vv *vv = dev->vv_data;
if (vv->resources & bit) {
DEB_D("already allocated! want: 0x%02x, cur:0x%02x\n",
bit, vv->resources);
/* have it already allocated */
return 1;
}
/* is it free? */
if (vv->resources & bit) {
DEB_D("locked! vv->resources:0x%02x, we want:0x%02x\n",
vv->resources, bit);
/* no, someone else uses it */
return 0;
}
/* it's free, grab it */
vv->resources |= bit;
DEB_D("res: get 0x%02x, cur:0x%02x\n", bit, vv->resources);
return 1;
}
void saa7146_res_free(struct saa7146_dev *dev, unsigned int bits)
{
struct saa7146_vv *vv = dev->vv_data;
WARN_ON((vv->resources & bits) != bits);
vv->resources &= ~bits;
DEB_D("res: put 0x%02x, cur:0x%02x\n", bits, vv->resources);
}
/********************************************************************************/
/* common buffer functions */
int saa7146_buffer_queue(struct saa7146_dev *dev,
struct saa7146_dmaqueue *q,
struct saa7146_buf *buf)
{
assert_spin_locked(&dev->slock);
DEB_EE("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf);
if (WARN_ON(!q))
return -EIO;
if (NULL == q->curr) {
q->curr = buf;
DEB_D("immediately activating buffer %p\n", buf);
buf->activate(dev,buf,NULL);
} else {
list_add_tail(&buf->list, &q->queue);
DEB_D("adding buffer %p to queue. (active buffer present)\n",
buf);
}
return 0;
}
void saa7146_buffer_finish(struct saa7146_dev *dev,
struct saa7146_dmaqueue *q,
int state)
{
struct saa7146_vv *vv = dev->vv_data;
struct saa7146_buf *buf = q->curr;
assert_spin_locked(&dev->slock);
DEB_EE("dev:%p, dmaq:%p, state:%d\n", dev, q, state);
DEB_EE("q->curr:%p\n", q->curr);
/* finish current buffer */
if (!buf) {
DEB_D("aiii. no current buffer\n");
return;
}
q->curr = NULL;
buf->vb.vb2_buf.timestamp = ktime_get_ns();
if (vv->video_fmt.field == V4L2_FIELD_ALTERNATE)
buf->vb.field = vv->last_field;
else if (vv->video_fmt.field == V4L2_FIELD_ANY)
buf->vb.field = (vv->video_fmt.height > vv->standard->v_max_out / 2)
? V4L2_FIELD_INTERLACED
: V4L2_FIELD_BOTTOM;
else
buf->vb.field = vv->video_fmt.field;
buf->vb.sequence = vv->seqnr++;
vb2_buffer_done(&buf->vb.vb2_buf, state);
}
void saa7146_buffer_next(struct saa7146_dev *dev,
struct saa7146_dmaqueue *q, int vbi)
{
struct saa7146_buf *buf,*next = NULL;
if (WARN_ON(!q))
return;
DEB_INT("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi);
assert_spin_locked(&dev->slock);
if (!list_empty(&q->queue)) {
/* activate next one from queue */
buf = list_entry(q->queue.next, struct saa7146_buf, list);
list_del(&buf->list);
if (!list_empty(&q->queue))
next = list_entry(q->queue.next, struct saa7146_buf, list);
q->curr = buf;
DEB_INT("next buffer: buf:%p, prev:%p, next:%p\n",
buf, q->queue.prev, q->queue.next);
buf->activate(dev,buf,next);
} else {
DEB_INT("no next buffer. stopping.\n");
if( 0 != vbi ) {
/* turn off video-dma3 */
saa7146_write(dev,MC1, MASK_20);
} else {
/* nothing to do -- just prevent next video-dma1 transfer
by lowering the protection address */
// fixme: fix this for vflip != 0
saa7146_write(dev, PROT_ADDR1, 0);
saa7146_write(dev, MC2, (MASK_02|MASK_18));
/* write the address of the rps-program */
saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
/* turn on rps */
saa7146_write(dev, MC1, (MASK_12 | MASK_28));
/*
printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
*/
}
del_timer(&q->timeout);
}
}
void saa7146_buffer_timeout(struct timer_list *t)
{
struct saa7146_dmaqueue *q = from_timer(q, t, timeout);
struct saa7146_dev *dev = q->dev;
unsigned long flags;
DEB_EE("dev:%p, dmaq:%p\n", dev, q);
spin_lock_irqsave(&dev->slock,flags);
if (q->curr) {
DEB_D("timeout on %p\n", q->curr);
saa7146_buffer_finish(dev, q, VB2_BUF_STATE_ERROR);
}
/* we don't restart the transfer here like other drivers do. when
a streaming capture is disabled, the timeout function will be
called for the current buffer. if we activate the next buffer now,
we mess up our capture logic. if a timeout occurs on another buffer,
then something is seriously broken before, so no need to buffer the
next capture IMHO... */
saa7146_buffer_next(dev, q, 0);
spin_unlock_irqrestore(&dev->slock,flags);
}
/********************************************************************************/
/* file operations */
static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
{
struct video_device *vdev = video_devdata(file);
struct saa7146_dev *dev = video_drvdata(file);
int ret;
if (vdev->vfl_type != VFL_TYPE_VBI || !dev->ext_vv_data->vbi_fops.write)
return -EINVAL;
if (mutex_lock_interruptible(vdev->lock))
return -ERESTARTSYS;
ret = dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
mutex_unlock(vdev->lock);
return ret;
}
static const struct v4l2_file_operations video_fops =
{
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = vb2_fop_release,
.read = vb2_fop_read,
.write = fops_write,
.poll = vb2_fop_poll,
.mmap = vb2_fop_mmap,
.unlocked_ioctl = video_ioctl2,
};
static void vv_callback(struct saa7146_dev *dev, unsigned long status)
{
u32 isr = status;
DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status);
if (0 != (isr & (MASK_27))) {
DEB_INT("irq: RPS0 (0x%08x)\n", isr);
saa7146_video_uops.irq_done(dev,isr);
}
if (0 != (isr & (MASK_28))) {
u32 mc2 = saa7146_read(dev, MC2);
if( 0 != (mc2 & MASK_15)) {
DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr);
wake_up(&dev->vv_data->vbi_wq);
saa7146_write(dev,MC2, MASK_31);
return;
}
DEB_INT("irq: RPS1 (0x%08x)\n", isr);
saa7146_vbi_uops.irq_done(dev,isr);
}
}
static const struct v4l2_ctrl_ops saa7146_ctrl_ops = {
.s_ctrl = saa7146_s_ctrl,
};
int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
{
struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler;
struct v4l2_pix_format *fmt;
struct v4l2_vbi_format *vbi;
struct saa7146_vv *vv;
int err;
err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
if (err)
return err;
v4l2_ctrl_handler_init(hdl, 6);
v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
V4L2_CID_CONTRAST, 0, 127, 1, 64);
v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
V4L2_CID_SATURATION, 0, 127, 1, 64);
v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
if (hdl->error) {
err = hdl->error;
v4l2_ctrl_handler_free(hdl);
v4l2_device_unregister(&dev->v4l2_dev);
return err;
}
dev->v4l2_dev.ctrl_handler = hdl;
vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
if (vv == NULL) {
ERR("out of memory. aborting.\n");
v4l2_ctrl_handler_free(hdl);
v4l2_device_unregister(&dev->v4l2_dev);
return -ENOMEM;
}
ext_vv->vid_ops = saa7146_video_ioctl_ops;
ext_vv->vbi_ops = saa7146_vbi_ioctl_ops;
ext_vv->core_ops = &saa7146_video_ioctl_ops;
DEB_EE("dev:%p\n", dev);
/* set default values for video parts of the saa7146 */
saa7146_write(dev, BCS_CTRL, 0x80400040);
/* enable video-port pins */
saa7146_write(dev, MC1, (MASK_10 | MASK_26));
/* save per-device extension data (one extension can
handle different devices that might need different
configuration data) */
dev->ext_vv_data = ext_vv;
saa7146_video_uops.init(dev,vv);
if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
saa7146_vbi_uops.init(dev,vv);
fmt = &vv->video_fmt;
fmt->width = 384;
fmt->height = 288;
fmt->pixelformat = V4L2_PIX_FMT_BGR24;
fmt->field = V4L2_FIELD_INTERLACED;
fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
fmt->bytesperline = 3 * fmt->width;
fmt->sizeimage = fmt->bytesperline * fmt->height;
vbi = &vv->vbi_fmt;
vbi->sampling_rate = 27000000;
vbi->offset = 248; /* todo */
vbi->samples_per_line = 720 * 2;
vbi->sample_format = V4L2_PIX_FMT_GREY;
/* fixme: this only works for PAL */
vbi->start[0] = 5;
vbi->count[0] = 16;
vbi->start[1] = 312;
vbi->count[1] = 16;
timer_setup(&vv->vbi_read_timeout, NULL, 0);
dev->vv_data = vv;
dev->vv_callback = &vv_callback;
return 0;
}
EXPORT_SYMBOL_GPL(saa7146_vv_init);
int saa7146_vv_release(struct saa7146_dev* dev)
{
struct saa7146_vv *vv = dev->vv_data;
DEB_EE("dev:%p\n", dev);
v4l2_device_unregister(&dev->v4l2_dev);
v4l2_ctrl_handler_free(&dev->ctrl_handler);
kfree(vv);
dev->vv_data = NULL;
dev->vv_callback = NULL;
return 0;
}
EXPORT_SYMBOL_GPL(saa7146_vv_release);
int saa7146_register_device(struct video_device *vfd, struct saa7146_dev *dev,
char *name, int type)
{
struct vb2_queue *q;
int err;
int i;
DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type);
vfd->fops = &video_fops;
if (type == VFL_TYPE_VIDEO) {
vfd->ioctl_ops = &dev->ext_vv_data->vid_ops;
q = &dev->vv_data->video_dmaq.q;
} else {
vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops;
q = &dev->vv_data->vbi_dmaq.q;
}
vfd->release = video_device_release_empty;
vfd->lock = &dev->v4l2_lock;
vfd->v4l2_dev = &dev->v4l2_dev;
vfd->tvnorms = 0;
for (i = 0; i < dev->ext_vv_data->num_stds; i++)
vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
strscpy(vfd->name, name, sizeof(vfd->name));
vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
vfd->device_caps |= dev->ext_vv_data->capabilities;
if (type == VFL_TYPE_VIDEO) {
vfd->device_caps &=
~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT);
} else if (vfd->device_caps & V4L2_CAP_SLICED_VBI_OUTPUT) {
vfd->vfl_dir = VFL_DIR_TX;
vfd->device_caps &= ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
V4L2_CAP_AUDIO | V4L2_CAP_TUNER);
} else {
vfd->device_caps &= ~V4L2_CAP_VIDEO_CAPTURE;
}
q->type = type == VFL_TYPE_VIDEO ? V4L2_BUF_TYPE_VIDEO_CAPTURE : V4L2_BUF_TYPE_VBI_CAPTURE;
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
q->ops = type == VFL_TYPE_VIDEO ? &video_qops : &vbi_qops;
q->mem_ops = &vb2_dma_sg_memops;
q->drv_priv = dev;
q->gfp_flags = __GFP_DMA32;
q->buf_struct_size = sizeof(struct saa7146_buf);
q->lock = &dev->v4l2_lock;
q->min_queued_buffers = 2;
q->dev = &dev->pci->dev;
err = vb2_queue_init(q);
if (err)
return err;
vfd->queue = q;
video_set_drvdata(vfd, dev);
err = video_register_device(vfd, type, -1);
if (err < 0) {
ERR("cannot register v4l2 device. skipping.\n");
return err;
}
pr_info("%s: registered device %s [v4l2]\n",
dev->name, video_device_node_name(vfd));
return 0;
}
EXPORT_SYMBOL_GPL(saa7146_register_device);
int saa7146_unregister_device(struct video_device *vfd, struct saa7146_dev *dev)
{
DEB_EE("dev:%p\n", dev);
video_unregister_device(vfd);
return 0;
}
EXPORT_SYMBOL_GPL(saa7146_unregister_device);
static int __init saa7146_vv_init_module(void)
{
return 0;
}
static void __exit saa7146_vv_cleanup_module(void)
{
}
module_init(saa7146_vv_init_module);
module_exit(saa7146_vv_cleanup_module);
MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
MODULE_LICENSE("GPL");