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linuxdebug/drivers/media/usb/au0828/au0828-video.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Auvitek AU0828 USB Bridge (Analog video support)
*
* Copyright (C) 2009 Devin Heitmueller <dheitmueller@linuxtv.org>
* Copyright (C) 2005-2008 Auvitek International, Ltd.
*/
/* Developer Notes:
*
* The hardware scaler supported is unimplemented
* AC97 audio support is unimplemented (only i2s audio mode)
*
*/
#include "au0828.h"
#include "au8522.h"
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/device.h>
#include <media/v4l2-common.h>
#include <media/v4l2-mc.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-event.h>
#include <media/tuner.h>
#include "au0828-reg.h"
static DEFINE_MUTEX(au0828_sysfs_lock);
/* ------------------------------------------------------------------
Videobuf operations
------------------------------------------------------------------*/
static unsigned int isoc_debug;
module_param(isoc_debug, int, 0644);
MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
#define au0828_isocdbg(fmt, arg...) \
do {\
if (isoc_debug) { \
pr_info("au0828 %s :"fmt, \
__func__ , ##arg); \
} \
} while (0)
static inline void i2c_gate_ctrl(struct au0828_dev *dev, int val)
{
if (dev->dvb.frontend && dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl)
dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl(dev->dvb.frontend, val);
}
static inline void print_err_status(struct au0828_dev *dev,
int packet, int status)
{
char *errmsg = "Unknown";
switch (status) {
case -ENOENT:
errmsg = "unlinked synchronously";
break;
case -ECONNRESET:
errmsg = "unlinked asynchronously";
break;
case -ENOSR:
errmsg = "Buffer error (overrun)";
break;
case -EPIPE:
errmsg = "Stalled (device not responding)";
break;
case -EOVERFLOW:
errmsg = "Babble (bad cable?)";
break;
case -EPROTO:
errmsg = "Bit-stuff error (bad cable?)";
break;
case -EILSEQ:
errmsg = "CRC/Timeout (could be anything)";
break;
case -ETIME:
errmsg = "Device does not respond";
break;
}
if (packet < 0) {
au0828_isocdbg("URB status %d [%s].\n", status, errmsg);
} else {
au0828_isocdbg("URB packet %d, status %d [%s].\n",
packet, status, errmsg);
}
}
static int check_dev(struct au0828_dev *dev)
{
if (test_bit(DEV_DISCONNECTED, &dev->dev_state)) {
pr_info("v4l2 ioctl: device not present\n");
return -ENODEV;
}
if (test_bit(DEV_MISCONFIGURED, &dev->dev_state)) {
pr_info("v4l2 ioctl: device is misconfigured; close and open it again\n");
return -EIO;
}
return 0;
}
/*
* IRQ callback, called by URB callback
*/
static void au0828_irq_callback(struct urb *urb)
{
struct au0828_dmaqueue *dma_q = urb->context;
struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
unsigned long flags = 0;
int i;
switch (urb->status) {
case 0: /* success */
case -ETIMEDOUT: /* NAK */
break;
case -ECONNRESET: /* kill */
case -ENOENT:
case -ESHUTDOWN:
au0828_isocdbg("au0828_irq_callback called: status kill\n");
return;
default: /* unknown error */
au0828_isocdbg("urb completion error %d.\n", urb->status);
break;
}
/* Copy data from URB */
spin_lock_irqsave(&dev->slock, flags);
dev->isoc_ctl.isoc_copy(dev, urb);
spin_unlock_irqrestore(&dev->slock, flags);
/* Reset urb buffers */
for (i = 0; i < urb->number_of_packets; i++) {
urb->iso_frame_desc[i].status = 0;
urb->iso_frame_desc[i].actual_length = 0;
}
urb->status = 0;
urb->status = usb_submit_urb(urb, GFP_ATOMIC);
if (urb->status) {
au0828_isocdbg("urb resubmit failed (error=%i)\n",
urb->status);
}
dev->stream_state = STREAM_ON;
}
/*
* Stop and Deallocate URBs
*/
static void au0828_uninit_isoc(struct au0828_dev *dev)
{
struct urb *urb;
int i;
au0828_isocdbg("au0828: called au0828_uninit_isoc\n");
dev->isoc_ctl.nfields = -1;
for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
urb = dev->isoc_ctl.urb[i];
if (urb) {
if (!irqs_disabled())
usb_kill_urb(urb);
else
usb_unlink_urb(urb);
if (dev->isoc_ctl.transfer_buffer[i]) {
usb_free_coherent(dev->usbdev,
urb->transfer_buffer_length,
dev->isoc_ctl.transfer_buffer[i],
urb->transfer_dma);
}
usb_free_urb(urb);
dev->isoc_ctl.urb[i] = NULL;
}
dev->isoc_ctl.transfer_buffer[i] = NULL;
}
kfree(dev->isoc_ctl.urb);
kfree(dev->isoc_ctl.transfer_buffer);
dev->isoc_ctl.urb = NULL;
dev->isoc_ctl.transfer_buffer = NULL;
dev->isoc_ctl.num_bufs = 0;
dev->stream_state = STREAM_OFF;
}
/*
* Allocate URBs and start IRQ
*/
static int au0828_init_isoc(struct au0828_dev *dev, int max_packets,
int num_bufs, int max_pkt_size,
int (*isoc_copy) (struct au0828_dev *dev, struct urb *urb))
{
struct au0828_dmaqueue *dma_q = &dev->vidq;
int i;
int sb_size, pipe;
struct urb *urb;
int j, k;
int rc;
au0828_isocdbg("au0828: called au0828_prepare_isoc\n");
dev->isoc_ctl.isoc_copy = isoc_copy;
dev->isoc_ctl.num_bufs = num_bufs;
dev->isoc_ctl.urb = kcalloc(num_bufs, sizeof(void *), GFP_KERNEL);
if (!dev->isoc_ctl.urb) {
au0828_isocdbg("cannot alloc memory for usb buffers\n");
return -ENOMEM;
}
dev->isoc_ctl.transfer_buffer = kcalloc(num_bufs, sizeof(void *),
GFP_KERNEL);
if (!dev->isoc_ctl.transfer_buffer) {
au0828_isocdbg("cannot allocate memory for usb transfer\n");
kfree(dev->isoc_ctl.urb);
return -ENOMEM;
}
dev->isoc_ctl.max_pkt_size = max_pkt_size;
dev->isoc_ctl.buf = NULL;
sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
/* allocate urbs and transfer buffers */
for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
urb = usb_alloc_urb(max_packets, GFP_KERNEL);
if (!urb) {
au0828_isocdbg("cannot allocate URB\n");
au0828_uninit_isoc(dev);
return -ENOMEM;
}
dev->isoc_ctl.urb[i] = urb;
dev->isoc_ctl.transfer_buffer[i] = usb_alloc_coherent(dev->usbdev,
sb_size, GFP_KERNEL, &urb->transfer_dma);
if (!dev->isoc_ctl.transfer_buffer[i]) {
au0828_isocdbg("cannot allocate transfer buffer\n");
au0828_uninit_isoc(dev);
return -ENOMEM;
}
memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
pipe = usb_rcvisocpipe(dev->usbdev,
dev->isoc_in_endpointaddr);
usb_fill_int_urb(urb, dev->usbdev, pipe,
dev->isoc_ctl.transfer_buffer[i], sb_size,
au0828_irq_callback, dma_q, 1);
urb->number_of_packets = max_packets;
urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
k = 0;
for (j = 0; j < max_packets; j++) {
urb->iso_frame_desc[j].offset = k;
urb->iso_frame_desc[j].length =
dev->isoc_ctl.max_pkt_size;
k += dev->isoc_ctl.max_pkt_size;
}
}
/* submit urbs and enables IRQ */
for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
if (rc) {
au0828_isocdbg("submit of urb %i failed (error=%i)\n",
i, rc);
au0828_uninit_isoc(dev);
return rc;
}
}
return 0;
}
/*
* Announces that a buffer were filled and request the next
*/
static inline void buffer_filled(struct au0828_dev *dev,
struct au0828_dmaqueue *dma_q,
struct au0828_buffer *buf)
{
struct vb2_v4l2_buffer *vb = &buf->vb;
struct vb2_queue *q = vb->vb2_buf.vb2_queue;
/* Advice that buffer was filled */
au0828_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
vb->sequence = dev->frame_count++;
else
vb->sequence = dev->vbi_frame_count++;
vb->field = V4L2_FIELD_INTERLACED;
vb->vb2_buf.timestamp = ktime_get_ns();
vb2_buffer_done(&vb->vb2_buf, VB2_BUF_STATE_DONE);
}
/*
* Identify the buffer header type and properly handles
*/
static void au0828_copy_video(struct au0828_dev *dev,
struct au0828_dmaqueue *dma_q,
struct au0828_buffer *buf,
unsigned char *p,
unsigned char *outp, unsigned long len)
{
void *fieldstart, *startwrite, *startread;
int linesdone, currlinedone, offset, lencopy, remain;
int bytesperline = dev->width << 1; /* Assumes 16-bit depth @@@@ */
if (len == 0)
return;
if (dma_q->pos + len > buf->length)
len = buf->length - dma_q->pos;
startread = p;
remain = len;
/* Interlaces frame */
if (buf->top_field)
fieldstart = outp;
else
fieldstart = outp + bytesperline;
linesdone = dma_q->pos / bytesperline;
currlinedone = dma_q->pos % bytesperline;
offset = linesdone * bytesperline * 2 + currlinedone;
startwrite = fieldstart + offset;
lencopy = bytesperline - currlinedone;
lencopy = lencopy > remain ? remain : lencopy;
if ((char *)startwrite + lencopy > (char *)outp + buf->length) {
au0828_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
((char *)startwrite + lencopy) -
((char *)outp + buf->length));
remain = (char *)outp + buf->length - (char *)startwrite;
lencopy = remain;
}
if (lencopy <= 0)
return;
memcpy(startwrite, startread, lencopy);
remain -= lencopy;
while (remain > 0) {
startwrite += lencopy + bytesperline;
startread += lencopy;
if (bytesperline > remain)
lencopy = remain;
else
lencopy = bytesperline;
if ((char *)startwrite + lencopy > (char *)outp +
buf->length) {
au0828_isocdbg("Overflow %zi bytes past buf end (2)\n",
((char *)startwrite + lencopy) -
((char *)outp + buf->length));
lencopy = remain = (char *)outp + buf->length -
(char *)startwrite;
}
if (lencopy <= 0)
break;
memcpy(startwrite, startread, lencopy);
remain -= lencopy;
}
if (offset > 1440) {
/* We have enough data to check for greenscreen */
if (outp[0] < 0x60 && outp[1440] < 0x60)
dev->greenscreen_detected = 1;
}
dma_q->pos += len;
}
/*
* generic routine to get the next available buffer
*/
static inline void get_next_buf(struct au0828_dmaqueue *dma_q,
struct au0828_buffer **buf)
{
struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
if (list_empty(&dma_q->active)) {
au0828_isocdbg("No active queue to serve\n");
dev->isoc_ctl.buf = NULL;
*buf = NULL;
return;
}
/* Get the next buffer */
*buf = list_entry(dma_q->active.next, struct au0828_buffer, list);
/* Cleans up buffer - Useful for testing for frame/URB loss */
list_del(&(*buf)->list);
dma_q->pos = 0;
(*buf)->vb_buf = (*buf)->mem;
dev->isoc_ctl.buf = *buf;
return;
}
static void au0828_copy_vbi(struct au0828_dev *dev,
struct au0828_dmaqueue *dma_q,
struct au0828_buffer *buf,
unsigned char *p,
unsigned char *outp, unsigned long len)
{
unsigned char *startwrite, *startread;
int bytesperline;
int i, j = 0;
if (dev == NULL) {
au0828_isocdbg("dev is null\n");
return;
}
if (dma_q == NULL) {
au0828_isocdbg("dma_q is null\n");
return;
}
if (buf == NULL)
return;
if (p == NULL) {
au0828_isocdbg("p is null\n");
return;
}
if (outp == NULL) {
au0828_isocdbg("outp is null\n");
return;
}
bytesperline = dev->vbi_width;
if (dma_q->pos + len > buf->length)
len = buf->length - dma_q->pos;
startread = p;
startwrite = outp + (dma_q->pos / 2);
/* Make sure the bottom field populates the second half of the frame */
if (buf->top_field == 0)
startwrite += bytesperline * dev->vbi_height;
for (i = 0; i < len; i += 2)
startwrite[j++] = startread[i+1];
dma_q->pos += len;
}
/*
* generic routine to get the next available VBI buffer
*/
static inline void vbi_get_next_buf(struct au0828_dmaqueue *dma_q,
struct au0828_buffer **buf)
{
struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vbiq);
if (list_empty(&dma_q->active)) {
au0828_isocdbg("No active queue to serve\n");
dev->isoc_ctl.vbi_buf = NULL;
*buf = NULL;
return;
}
/* Get the next buffer */
*buf = list_entry(dma_q->active.next, struct au0828_buffer, list);
/* Cleans up buffer - Useful for testing for frame/URB loss */
list_del(&(*buf)->list);
dma_q->pos = 0;
(*buf)->vb_buf = (*buf)->mem;
dev->isoc_ctl.vbi_buf = *buf;
return;
}
/*
* Controls the isoc copy of each urb packet
*/
static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
{
struct au0828_buffer *buf;
struct au0828_buffer *vbi_buf;
struct au0828_dmaqueue *dma_q = urb->context;
struct au0828_dmaqueue *vbi_dma_q = &dev->vbiq;
unsigned char *outp = NULL;
unsigned char *vbioutp = NULL;
int i, len = 0, rc = 1;
unsigned char *p;
unsigned char fbyte;
unsigned int vbi_field_size;
unsigned int remain, lencopy;
if (!dev)
return 0;
if (test_bit(DEV_DISCONNECTED, &dev->dev_state) ||
test_bit(DEV_MISCONFIGURED, &dev->dev_state))
return 0;
if (urb->status < 0) {
print_err_status(dev, -1, urb->status);
if (urb->status == -ENOENT)
return 0;
}
buf = dev->isoc_ctl.buf;
if (buf != NULL)
outp = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
vbi_buf = dev->isoc_ctl.vbi_buf;
if (vbi_buf != NULL)
vbioutp = vb2_plane_vaddr(&vbi_buf->vb.vb2_buf, 0);
for (i = 0; i < urb->number_of_packets; i++) {
int status = urb->iso_frame_desc[i].status;
if (status < 0) {
print_err_status(dev, i, status);
if (urb->iso_frame_desc[i].status != -EPROTO)
continue;
}
if (urb->iso_frame_desc[i].actual_length <= 0)
continue;
if (urb->iso_frame_desc[i].actual_length >
dev->max_pkt_size) {
au0828_isocdbg("packet bigger than packet size");
continue;
}
p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
fbyte = p[0];
len = urb->iso_frame_desc[i].actual_length - 4;
p += 4;
if (fbyte & 0x80) {
len -= 4;
p += 4;
au0828_isocdbg("Video frame %s\n",
(fbyte & 0x40) ? "odd" : "even");
if (fbyte & 0x40) {
/* VBI */
if (vbi_buf != NULL)
buffer_filled(dev, vbi_dma_q, vbi_buf);
vbi_get_next_buf(vbi_dma_q, &vbi_buf);
if (vbi_buf == NULL)
vbioutp = NULL;
else
vbioutp = vb2_plane_vaddr(
&vbi_buf->vb.vb2_buf, 0);
/* Video */
if (buf != NULL)
buffer_filled(dev, dma_q, buf);
get_next_buf(dma_q, &buf);
if (buf == NULL)
outp = NULL;
else
outp = vb2_plane_vaddr(
&buf->vb.vb2_buf, 0);
/* As long as isoc traffic is arriving, keep
resetting the timer */
if (dev->vid_timeout_running)
mod_timer(&dev->vid_timeout,
jiffies + (HZ / 10));
if (dev->vbi_timeout_running)
mod_timer(&dev->vbi_timeout,
jiffies + (HZ / 10));
}
if (buf != NULL) {
if (fbyte & 0x40)
buf->top_field = 1;
else
buf->top_field = 0;
}
if (vbi_buf != NULL) {
if (fbyte & 0x40)
vbi_buf->top_field = 1;
else
vbi_buf->top_field = 0;
}
dev->vbi_read = 0;
vbi_dma_q->pos = 0;
dma_q->pos = 0;
}
vbi_field_size = dev->vbi_width * dev->vbi_height * 2;
if (dev->vbi_read < vbi_field_size) {
remain = vbi_field_size - dev->vbi_read;
if (len < remain)
lencopy = len;
else
lencopy = remain;
if (vbi_buf != NULL)
au0828_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
vbioutp, len);
len -= lencopy;
p += lencopy;
dev->vbi_read += lencopy;
}
if (dev->vbi_read >= vbi_field_size && buf != NULL)
au0828_copy_video(dev, dma_q, buf, p, outp, len);
}
return rc;
}
void au0828_usb_v4l2_media_release(struct au0828_dev *dev)
{
#ifdef CONFIG_MEDIA_CONTROLLER
int i;
for (i = 0; i < AU0828_MAX_INPUT; i++) {
if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
return;
media_device_unregister_entity(&dev->input_ent[i]);
}
#endif
}
static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev)
{
struct au0828_dev *dev =
container_of(v4l2_dev, struct au0828_dev, v4l2_dev);
v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl);
v4l2_device_unregister(&dev->v4l2_dev);
au0828_usb_v4l2_media_release(dev);
au0828_usb_release(dev);
}
int au0828_v4l2_device_register(struct usb_interface *interface,
struct au0828_dev *dev)
{
int retval;
if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
return 0;
/* Create the v4l2_device */
#ifdef CONFIG_MEDIA_CONTROLLER
dev->v4l2_dev.mdev = dev->media_dev;
#endif
retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
if (retval) {
pr_err("%s() v4l2_device_register failed\n",
__func__);
return retval;
}
dev->v4l2_dev.release = au0828_usb_v4l2_release;
/* This control handler will inherit the controls from au8522 */
retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4);
if (retval) {
pr_err("%s() v4l2_ctrl_handler_init failed\n",
__func__);
return retval;
}
dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl;
return 0;
}
static int queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct au0828_dev *dev = vb2_get_drv_priv(vq);
unsigned long size = dev->height * dev->bytesperline;
if (*nplanes)
return sizes[0] < size ? -EINVAL : 0;
*nplanes = 1;
sizes[0] = size;
return 0;
}
static int
buffer_prepare(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct au0828_buffer *buf = container_of(vbuf,
struct au0828_buffer, vb);
struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
buf->length = dev->height * dev->bytesperline;
if (vb2_plane_size(vb, 0) < buf->length) {
pr_err("%s data will not fit into plane (%lu < %lu)\n",
__func__, vb2_plane_size(vb, 0), buf->length);
return -EINVAL;
}
vb2_set_plane_payload(&buf->vb.vb2_buf, 0, buf->length);
return 0;
}
static void
buffer_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct au0828_buffer *buf = container_of(vbuf,
struct au0828_buffer,
vb);
struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
struct au0828_dmaqueue *vidq = &dev->vidq;
unsigned long flags = 0;
buf->mem = vb2_plane_vaddr(vb, 0);
buf->length = vb2_plane_size(vb, 0);
spin_lock_irqsave(&dev->slock, flags);
list_add_tail(&buf->list, &vidq->active);
spin_unlock_irqrestore(&dev->slock, flags);
}
static int au0828_i2s_init(struct au0828_dev *dev)
{
/* Enable i2s mode */
au0828_writereg(dev, AU0828_AUDIOCTRL_50C, 0x01);
return 0;
}
/*
* Auvitek au0828 analog stream enable
*/
static int au0828_analog_stream_enable(struct au0828_dev *d)
{
struct usb_interface *iface;
int ret, h, w;
dprintk(1, "au0828_analog_stream_enable called\n");
if (test_bit(DEV_DISCONNECTED, &d->dev_state))
return -ENODEV;
iface = usb_ifnum_to_if(d->usbdev, 0);
if (iface && iface->cur_altsetting->desc.bAlternateSetting != 5) {
dprintk(1, "Changing intf#0 to alt 5\n");
/* set au0828 interface0 to AS5 here again */
ret = usb_set_interface(d->usbdev, 0, 5);
if (ret < 0) {
pr_info("Au0828 can't set alt setting to 5!\n");
return -EBUSY;
}
}
h = d->height / 2 + 2;
w = d->width * 2;
au0828_writereg(d, AU0828_SENSORCTRL_VBI_103, 0x00);
au0828_writereg(d, 0x106, 0x00);
/* set x position */
au0828_writereg(d, 0x110, 0x00);
au0828_writereg(d, 0x111, 0x00);
au0828_writereg(d, 0x114, w & 0xff);
au0828_writereg(d, 0x115, w >> 8);
/* set y position */
au0828_writereg(d, 0x112, 0x00);
au0828_writereg(d, 0x113, 0x00);
au0828_writereg(d, 0x116, h & 0xff);
au0828_writereg(d, 0x117, h >> 8);
au0828_writereg(d, AU0828_SENSORCTRL_100, 0xb3);
return 0;
}
static int au0828_analog_stream_disable(struct au0828_dev *d)
{
dprintk(1, "au0828_analog_stream_disable called\n");
au0828_writereg(d, AU0828_SENSORCTRL_100, 0x0);
return 0;
}
static void au0828_analog_stream_reset(struct au0828_dev *dev)
{
dprintk(1, "au0828_analog_stream_reset called\n");
au0828_writereg(dev, AU0828_SENSORCTRL_100, 0x0);
mdelay(30);
au0828_writereg(dev, AU0828_SENSORCTRL_100, 0xb3);
}
/*
* Some operations needs to stop current streaming
*/
static int au0828_stream_interrupt(struct au0828_dev *dev)
{
dev->stream_state = STREAM_INTERRUPT;
if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
return -ENODEV;
return 0;
}
int au0828_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
{
struct au0828_dev *dev = vb2_get_drv_priv(vq);
int rc = 0;
dprintk(1, "au0828_start_analog_streaming called %d\n",
dev->streaming_users);
if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
dev->frame_count = 0;
else
dev->vbi_frame_count = 0;
if (dev->streaming_users == 0) {
/* If we were doing ac97 instead of i2s, it would go here...*/
au0828_i2s_init(dev);
rc = au0828_init_isoc(dev, AU0828_ISO_PACKETS_PER_URB,
AU0828_MAX_ISO_BUFS, dev->max_pkt_size,
au0828_isoc_copy);
if (rc < 0) {
pr_info("au0828_init_isoc failed\n");
return rc;
}
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1);
if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
dev->vid_timeout_running = 1;
mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
} else if (vq->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
dev->vbi_timeout_running = 1;
mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
}
}
dev->streaming_users++;
return rc;
}
static void au0828_stop_streaming(struct vb2_queue *vq)
{
struct au0828_dev *dev = vb2_get_drv_priv(vq);
struct au0828_dmaqueue *vidq = &dev->vidq;
unsigned long flags = 0;
dprintk(1, "au0828_stop_streaming called %d\n", dev->streaming_users);
if (dev->streaming_users-- == 1) {
au0828_uninit_isoc(dev);
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
}
dev->vid_timeout_running = 0;
del_timer_sync(&dev->vid_timeout);
spin_lock_irqsave(&dev->slock, flags);
if (dev->isoc_ctl.buf != NULL) {
vb2_buffer_done(&dev->isoc_ctl.buf->vb.vb2_buf,
VB2_BUF_STATE_ERROR);
dev->isoc_ctl.buf = NULL;
}
while (!list_empty(&vidq->active)) {
struct au0828_buffer *buf;
buf = list_entry(vidq->active.next, struct au0828_buffer, list);
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
list_del(&buf->list);
}
spin_unlock_irqrestore(&dev->slock, flags);
}
void au0828_stop_vbi_streaming(struct vb2_queue *vq)
{
struct au0828_dev *dev = vb2_get_drv_priv(vq);
struct au0828_dmaqueue *vbiq = &dev->vbiq;
unsigned long flags = 0;
dprintk(1, "au0828_stop_vbi_streaming called %d\n",
dev->streaming_users);
if (dev->streaming_users-- == 1) {
au0828_uninit_isoc(dev);
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
}
spin_lock_irqsave(&dev->slock, flags);
if (dev->isoc_ctl.vbi_buf != NULL) {
vb2_buffer_done(&dev->isoc_ctl.vbi_buf->vb.vb2_buf,
VB2_BUF_STATE_ERROR);
dev->isoc_ctl.vbi_buf = NULL;
}
while (!list_empty(&vbiq->active)) {
struct au0828_buffer *buf;
buf = list_entry(vbiq->active.next, struct au0828_buffer, list);
list_del(&buf->list);
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
spin_unlock_irqrestore(&dev->slock, flags);
dev->vbi_timeout_running = 0;
del_timer_sync(&dev->vbi_timeout);
}
static const struct vb2_ops au0828_video_qops = {
.queue_setup = queue_setup,
.buf_prepare = buffer_prepare,
.buf_queue = buffer_queue,
.start_streaming = au0828_start_analog_streaming,
.stop_streaming = au0828_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
/* ------------------------------------------------------------------
V4L2 interface
------------------------------------------------------------------*/
/*
* au0828_analog_unregister
* unregister v4l2 devices
*/
int au0828_analog_unregister(struct au0828_dev *dev)
{
dprintk(1, "au0828_analog_unregister called\n");
/* No analog TV */
if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
return 0;
mutex_lock(&au0828_sysfs_lock);
vb2_video_unregister_device(&dev->vdev);
vb2_video_unregister_device(&dev->vbi_dev);
mutex_unlock(&au0828_sysfs_lock);
v4l2_device_disconnect(&dev->v4l2_dev);
v4l2_device_put(&dev->v4l2_dev);
return 1;
}
/* This function ensures that video frames continue to be delivered even if
the ITU-656 input isn't receiving any data (thereby preventing applications
such as tvtime from hanging) */
static void au0828_vid_buffer_timeout(struct timer_list *t)
{
struct au0828_dev *dev = from_timer(dev, t, vid_timeout);
struct au0828_dmaqueue *dma_q = &dev->vidq;
struct au0828_buffer *buf;
unsigned char *vid_data;
unsigned long flags = 0;
spin_lock_irqsave(&dev->slock, flags);
buf = dev->isoc_ctl.buf;
if (buf != NULL) {
vid_data = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
memset(vid_data, 0x00, buf->length); /* Blank green frame */
buffer_filled(dev, dma_q, buf);
}
get_next_buf(dma_q, &buf);
if (dev->vid_timeout_running == 1)
mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
spin_unlock_irqrestore(&dev->slock, flags);
}
static void au0828_vbi_buffer_timeout(struct timer_list *t)
{
struct au0828_dev *dev = from_timer(dev, t, vbi_timeout);
struct au0828_dmaqueue *dma_q = &dev->vbiq;
struct au0828_buffer *buf;
unsigned char *vbi_data;
unsigned long flags = 0;
spin_lock_irqsave(&dev->slock, flags);
buf = dev->isoc_ctl.vbi_buf;
if (buf != NULL) {
vbi_data = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
memset(vbi_data, 0x00, buf->length);
buffer_filled(dev, dma_q, buf);
}
vbi_get_next_buf(dma_q, &buf);
if (dev->vbi_timeout_running == 1)
mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
spin_unlock_irqrestore(&dev->slock, flags);
}
static int au0828_v4l2_open(struct file *filp)
{
struct au0828_dev *dev = video_drvdata(filp);
int ret;
dprintk(1,
"%s called std_set %d dev_state %ld stream users %d users %d\n",
__func__, dev->std_set_in_tuner_core, dev->dev_state,
dev->streaming_users, dev->users);
if (mutex_lock_interruptible(&dev->lock))
return -ERESTARTSYS;
ret = v4l2_fh_open(filp);
if (ret) {
au0828_isocdbg("%s: v4l2_fh_open() returned error %d\n",
__func__, ret);
mutex_unlock(&dev->lock);
return ret;
}
if (dev->users == 0) {
au0828_analog_stream_enable(dev);
au0828_analog_stream_reset(dev);
dev->stream_state = STREAM_OFF;
set_bit(DEV_INITIALIZED, &dev->dev_state);
}
dev->users++;
mutex_unlock(&dev->lock);
return ret;
}
static int au0828_v4l2_close(struct file *filp)
{
int ret;
struct au0828_dev *dev = video_drvdata(filp);
struct video_device *vdev = video_devdata(filp);
dprintk(1,
"%s called std_set %d dev_state %ld stream users %d users %d\n",
__func__, dev->std_set_in_tuner_core, dev->dev_state,
dev->streaming_users, dev->users);
mutex_lock(&dev->lock);
if (vdev->vfl_type == VFL_TYPE_VIDEO && dev->vid_timeout_running) {
/* Cancel timeout thread in case they didn't call streamoff */
dev->vid_timeout_running = 0;
del_timer_sync(&dev->vid_timeout);
} else if (vdev->vfl_type == VFL_TYPE_VBI &&
dev->vbi_timeout_running) {
/* Cancel timeout thread in case they didn't call streamoff */
dev->vbi_timeout_running = 0;
del_timer_sync(&dev->vbi_timeout);
}
if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
goto end;
if (dev->users == 1) {
/*
* Avoid putting tuner in sleep if DVB or ALSA are
* streaming.
*
* On most USB devices like au0828 the tuner can
* be safely put in sleep state here if ALSA isn't
* streaming. Exceptions are some very old USB tuner
* models such as em28xx-based WinTV USB2 which have
* a separate audio output jack. The devices that have
* a separate audio output jack have analog tuners,
* like Philips FM1236. Those devices are always on,
* so the s_power callback are silently ignored.
* So, the current logic here does the following:
* Disable (put tuner to sleep) when
* - ALSA and DVB aren't streaming.
* - the last V4L2 file handler is closed.
*
* FIXME:
*
* Additionally, this logic could be improved to
* disable the media source if the above conditions
* are met and if the device:
* - doesn't have a separate audio out plug (or
* - doesn't use a silicon tuner like xc2028/3028/4000/5000).
*
* Once this additional logic is in place, a callback
* is needed to enable the media source and power on
* the tuner, for radio to work.
*/
ret = v4l_enable_media_source(vdev);
if (ret == 0)
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner,
standby);
dev->std_set_in_tuner_core = 0;
/* When close the device, set the usb intf0 into alt0 to free
USB bandwidth */
ret = usb_set_interface(dev->usbdev, 0, 0);
if (ret < 0)
pr_info("Au0828 can't set alternate to 0!\n");
}
end:
_vb2_fop_release(filp, NULL);
dev->users--;
mutex_unlock(&dev->lock);
return 0;
}
/* Must be called with dev->lock held */
static void au0828_init_tuner(struct au0828_dev *dev)
{
struct v4l2_frequency f = {
.frequency = dev->ctrl_freq,
.type = V4L2_TUNER_ANALOG_TV,
};
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
if (dev->std_set_in_tuner_core)
return;
dev->std_set_in_tuner_core = 1;
i2c_gate_ctrl(dev, 1);
/* If we've never sent the standard in tuner core, do so now.
We don't do this at device probe because we don't want to
incur the cost of a firmware load */
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, dev->std);
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
i2c_gate_ctrl(dev, 0);
}
static int au0828_set_format(struct au0828_dev *dev, unsigned int cmd,
struct v4l2_format *format)
{
int ret;
int width = format->fmt.pix.width;
int height = format->fmt.pix.height;
/* If they are demanding a format other than the one we support,
bail out (tvtime asks for UYVY and then retries with YUYV) */
if (format->fmt.pix.pixelformat != V4L2_PIX_FMT_UYVY)
return -EINVAL;
/* format->fmt.pix.width only support 720 and height 480 */
if (width != 720)
width = 720;
if (height != 480)
height = 480;
format->fmt.pix.width = width;
format->fmt.pix.height = height;
format->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
format->fmt.pix.bytesperline = width * 2;
format->fmt.pix.sizeimage = width * height * 2;
format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
format->fmt.pix.field = V4L2_FIELD_INTERLACED;
if (cmd == VIDIOC_TRY_FMT)
return 0;
/* maybe set new image format, driver current only support 720*480 */
dev->width = width;
dev->height = height;
dev->frame_size = width * height * 2;
dev->field_size = width * height;
dev->bytesperline = width * 2;
if (dev->stream_state == STREAM_ON) {
dprintk(1, "VIDIOC_SET_FMT: interrupting stream!\n");
ret = au0828_stream_interrupt(dev);
if (ret != 0) {
dprintk(1, "error interrupting video stream!\n");
return ret;
}
}
au0828_analog_stream_enable(dev);
return 0;
}
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
strscpy(cap->driver, "au0828", sizeof(cap->driver));
strscpy(cap->card, dev->board.name, sizeof(cap->card));
usb_make_path(dev->usbdev, cap->bus_info, sizeof(cap->bus_info));
/* set the device capabilities */
cap->capabilities =
V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE | V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
if (f->index)
return -EINVAL;
dprintk(1, "%s called\n", __func__);
f->pixelformat = V4L2_PIX_FMT_UYVY;
return 0;
}
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
f->fmt.pix.width = dev->width;
f->fmt.pix.height = dev->height;
f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
f->fmt.pix.bytesperline = dev->bytesperline;
f->fmt.pix.sizeimage = dev->frame_size;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; /* NTSC/PAL */
f->fmt.pix.field = V4L2_FIELD_INTERLACED;
return 0;
}
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
return au0828_set_format(dev, VIDIOC_TRY_FMT, f);
}
static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct au0828_dev *dev = video_drvdata(file);
int rc;
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
rc = check_dev(dev);
if (rc < 0)
return rc;
if (vb2_is_busy(&dev->vb_vidq)) {
pr_info("%s queue busy\n", __func__);
rc = -EBUSY;
goto out;
}
rc = au0828_set_format(dev, VIDIOC_S_FMT, f);
out:
return rc;
}
static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
if (norm == dev->std)
return 0;
if (dev->streaming_users > 0)
return -EBUSY;
dev->std = norm;
au0828_init_tuner(dev);
i2c_gate_ctrl(dev, 1);
/*
* FIXME: when we support something other than 60Hz standards,
* we are going to have to make the au0828 bridge adjust the size
* of its capture buffer, which is currently hardcoded at 720x480
*/
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, norm);
i2c_gate_ctrl(dev, 0);
return 0;
}
static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
*norm = dev->std;
return 0;
}
static int vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *input)
{
struct au0828_dev *dev = video_drvdata(file);
unsigned int tmp;
static const char *inames[] = {
[AU0828_VMUX_UNDEFINED] = "Undefined",
[AU0828_VMUX_COMPOSITE] = "Composite",
[AU0828_VMUX_SVIDEO] = "S-Video",
[AU0828_VMUX_CABLE] = "Cable TV",
[AU0828_VMUX_TELEVISION] = "Television",
[AU0828_VMUX_DVB] = "DVB",
};
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
tmp = input->index;
if (tmp >= AU0828_MAX_INPUT)
return -EINVAL;
if (AUVI_INPUT(tmp).type == 0)
return -EINVAL;
input->index = tmp;
strscpy(input->name, inames[AUVI_INPUT(tmp).type], sizeof(input->name));
if ((AUVI_INPUT(tmp).type == AU0828_VMUX_TELEVISION) ||
(AUVI_INPUT(tmp).type == AU0828_VMUX_CABLE)) {
input->type |= V4L2_INPUT_TYPE_TUNER;
input->audioset = 1;
} else {
input->type |= V4L2_INPUT_TYPE_CAMERA;
input->audioset = 2;
}
input->std = dev->vdev.tvnorms;
return 0;
}
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
*i = dev->ctrl_input;
return 0;
}
static void au0828_s_input(struct au0828_dev *dev, int index)
{
int i;
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
switch (AUVI_INPUT(index).type) {
case AU0828_VMUX_SVIDEO:
dev->input_type = AU0828_VMUX_SVIDEO;
dev->ctrl_ainput = 1;
break;
case AU0828_VMUX_COMPOSITE:
dev->input_type = AU0828_VMUX_COMPOSITE;
dev->ctrl_ainput = 1;
break;
case AU0828_VMUX_TELEVISION:
dev->input_type = AU0828_VMUX_TELEVISION;
dev->ctrl_ainput = 0;
break;
default:
dprintk(1, "unknown input type set [%d]\n",
AUVI_INPUT(index).type);
return;
}
dev->ctrl_input = index;
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
AUVI_INPUT(index).vmux, 0, 0);
for (i = 0; i < AU0828_MAX_INPUT; i++) {
int enable = 0;
if (AUVI_INPUT(i).audio_setup == NULL)
continue;
if (i == index)
enable = 1;
else
enable = 0;
if (enable) {
(AUVI_INPUT(i).audio_setup)(dev, enable);
} else {
/* Make sure we leave it turned on if some
other input is routed to this callback */
if ((AUVI_INPUT(i).audio_setup) !=
((AUVI_INPUT(index).audio_setup))) {
(AUVI_INPUT(i).audio_setup)(dev, enable);
}
}
}
v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
AUVI_INPUT(index).amux, 0, 0);
}
static int vidioc_s_input(struct file *file, void *priv, unsigned int index)
{
struct au0828_dev *dev = video_drvdata(file);
struct video_device *vfd = video_devdata(file);
dprintk(1, "VIDIOC_S_INPUT in function %s, input=%d\n", __func__,
index);
if (index >= AU0828_MAX_INPUT)
return -EINVAL;
if (AUVI_INPUT(index).type == 0)
return -EINVAL;
if (dev->ctrl_input == index)
return 0;
au0828_s_input(dev, index);
/*
* Input has been changed. Disable the media source
* associated with the old input and enable source
* for the newly set input
*/
v4l_disable_media_source(vfd);
return v4l_enable_media_source(vfd);
}
static int vidioc_enumaudio(struct file *file, void *priv, struct v4l2_audio *a)
{
if (a->index > 1)
return -EINVAL;
dprintk(1, "%s called\n", __func__);
if (a->index == 0)
strscpy(a->name, "Television", sizeof(a->name));
else
strscpy(a->name, "Line in", sizeof(a->name));
a->capability = V4L2_AUDCAP_STEREO;
return 0;
}
static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
a->index = dev->ctrl_ainput;
if (a->index == 0)
strscpy(a->name, "Television", sizeof(a->name));
else
strscpy(a->name, "Line in", sizeof(a->name));
a->capability = V4L2_AUDCAP_STEREO;
return 0;
}
static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a)
{
struct au0828_dev *dev = video_drvdata(file);
if (a->index != dev->ctrl_ainput)
return -EINVAL;
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
return 0;
}
static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
{
struct au0828_dev *dev = video_drvdata(file);
struct video_device *vfd = video_devdata(file);
int ret;
if (t->index != 0)
return -EINVAL;
ret = v4l_enable_media_source(vfd);
if (ret)
return ret;
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
strscpy(t->name, "Auvitek tuner", sizeof(t->name));
au0828_init_tuner(dev);
i2c_gate_ctrl(dev, 1);
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
i2c_gate_ctrl(dev, 0);
return 0;
}
static int vidioc_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *t)
{
struct au0828_dev *dev = video_drvdata(file);
if (t->index != 0)
return -EINVAL;
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
au0828_init_tuner(dev);
i2c_gate_ctrl(dev, 1);
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
i2c_gate_ctrl(dev, 0);
dprintk(1, "VIDIOC_S_TUNER: signal = %x, afc = %x\n", t->signal,
t->afc);
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *freq)
{
struct au0828_dev *dev = video_drvdata(file);
if (freq->tuner != 0)
return -EINVAL;
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
freq->frequency = dev->ctrl_freq;
return 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *freq)
{
struct au0828_dev *dev = video_drvdata(file);
struct v4l2_frequency new_freq = *freq;
if (freq->tuner != 0)
return -EINVAL;
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
au0828_init_tuner(dev);
i2c_gate_ctrl(dev, 1);
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, freq);
/* Get the actual set (and possibly clamped) frequency */
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_frequency, &new_freq);
dev->ctrl_freq = new_freq.frequency;
i2c_gate_ctrl(dev, 0);
au0828_analog_stream_reset(dev);
return 0;
}
/* RAW VBI ioctls */
static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
struct v4l2_format *format)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
format->fmt.vbi.samples_per_line = dev->vbi_width;
format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
format->fmt.vbi.offset = 0;
format->fmt.vbi.flags = 0;
format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
format->fmt.vbi.count[0] = dev->vbi_height;
format->fmt.vbi.count[1] = dev->vbi_height;
format->fmt.vbi.start[0] = 21;
format->fmt.vbi.start[1] = 284;
memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
return 0;
}
static int vidioc_g_pixelaspect(struct file *file, void *priv,
int type, struct v4l2_fract *f)
{
struct au0828_dev *dev = video_drvdata(file);
if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
f->numerator = 54;
f->denominator = 59;
return 0;
}
static int vidioc_g_selection(struct file *file, void *priv,
struct v4l2_selection *s)
{
struct au0828_dev *dev = video_drvdata(file);
if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
switch (s->target) {
case V4L2_SEL_TGT_CROP_BOUNDS:
case V4L2_SEL_TGT_CROP_DEFAULT:
s->r.left = 0;
s->r.top = 0;
s->r.width = dev->width;
s->r.height = dev->height;
break;
default:
return -EINVAL;
}
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int vidioc_g_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
reg->val = au0828_read(dev, reg->reg);
reg->size = 1;
return 0;
}
static int vidioc_s_register(struct file *file, void *priv,
const struct v4l2_dbg_register *reg)
{
struct au0828_dev *dev = video_drvdata(file);
dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
dev->std_set_in_tuner_core, dev->dev_state);
return au0828_writereg(dev, reg->reg, reg->val);
}
#endif
static int vidioc_log_status(struct file *file, void *fh)
{
struct video_device *vdev = video_devdata(file);
dprintk(1, "%s called\n", __func__);
v4l2_ctrl_log_status(file, fh);
v4l2_device_call_all(vdev->v4l2_dev, 0, core, log_status);
return 0;
}
void au0828_v4l2_suspend(struct au0828_dev *dev)
{
struct urb *urb;
int i;
pr_info("stopping V4L2\n");
if (dev->stream_state == STREAM_ON) {
pr_info("stopping V4L2 active URBs\n");
au0828_analog_stream_disable(dev);
/* stop urbs */
for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
urb = dev->isoc_ctl.urb[i];
if (urb) {
if (!irqs_disabled())
usb_kill_urb(urb);
else
usb_unlink_urb(urb);
}
}
}
if (dev->vid_timeout_running)
del_timer_sync(&dev->vid_timeout);
if (dev->vbi_timeout_running)
del_timer_sync(&dev->vbi_timeout);
}
void au0828_v4l2_resume(struct au0828_dev *dev)
{
int i, rc;
pr_info("restarting V4L2\n");
if (dev->stream_state == STREAM_ON) {
au0828_stream_interrupt(dev);
au0828_init_tuner(dev);
}
if (dev->vid_timeout_running)
mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
if (dev->vbi_timeout_running)
mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
/* If we were doing ac97 instead of i2s, it would go here...*/
au0828_i2s_init(dev);
au0828_analog_stream_enable(dev);
if (!(dev->stream_state == STREAM_ON)) {
au0828_analog_stream_reset(dev);
/* submit urbs */
for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
if (rc) {
au0828_isocdbg("submit of urb %i failed (error=%i)\n",
i, rc);
au0828_uninit_isoc(dev);
}
}
}
}
static const struct v4l2_file_operations au0828_v4l_fops = {
.owner = THIS_MODULE,
.open = au0828_v4l2_open,
.release = au0828_v4l2_close,
.read = vb2_fop_read,
.poll = vb2_fop_poll,
.mmap = vb2_fop_mmap,
.unlocked_ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops video_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
.vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
.vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
.vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
.vidioc_enumaudio = vidioc_enumaudio,
.vidioc_g_audio = vidioc_g_audio,
.vidioc_s_audio = vidioc_s_audio,
.vidioc_g_pixelaspect = vidioc_g_pixelaspect,
.vidioc_g_selection = vidioc_g_selection,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_s_std = vidioc_s_std,
.vidioc_g_std = vidioc_g_std,
.vidioc_enum_input = vidioc_enum_input,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_g_tuner = vidioc_g_tuner,
.vidioc_s_tuner = vidioc_s_tuner,
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_register = vidioc_g_register,
.vidioc_s_register = vidioc_s_register,
#endif
.vidioc_log_status = vidioc_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static const struct video_device au0828_video_template = {
.fops = &au0828_v4l_fops,
.release = video_device_release_empty,
.ioctl_ops = &video_ioctl_ops,
.tvnorms = V4L2_STD_NTSC_M | V4L2_STD_PAL_M,
};
static int au0828_vb2_setup(struct au0828_dev *dev)
{
int rc;
struct vb2_queue *q;
/* Setup Videobuf2 for Video capture */
q = &dev->vb_vidq;
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
q->drv_priv = dev;
q->buf_struct_size = sizeof(struct au0828_buffer);
q->ops = &au0828_video_qops;
q->mem_ops = &vb2_vmalloc_memops;
rc = vb2_queue_init(q);
if (rc < 0)
return rc;
/* Setup Videobuf2 for VBI capture */
q = &dev->vb_vbiq;
q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
q->drv_priv = dev;
q->buf_struct_size = sizeof(struct au0828_buffer);
q->ops = &au0828_vbi_qops;
q->mem_ops = &vb2_vmalloc_memops;
rc = vb2_queue_init(q);
if (rc < 0)
return rc;
return 0;
}
static void au0828_analog_create_entities(struct au0828_dev *dev)
{
#if defined(CONFIG_MEDIA_CONTROLLER)
static const char * const inames[] = {
[AU0828_VMUX_COMPOSITE] = "Composite",
[AU0828_VMUX_SVIDEO] = "S-Video",
[AU0828_VMUX_CABLE] = "Cable TV",
[AU0828_VMUX_TELEVISION] = "Television",
[AU0828_VMUX_DVB] = "DVB",
};
int ret, i;
/* Initialize Video and VBI pads */
dev->video_pad.flags = MEDIA_PAD_FL_SINK;
ret = media_entity_pads_init(&dev->vdev.entity, 1, &dev->video_pad);
if (ret < 0)
pr_err("failed to initialize video media entity!\n");
dev->vbi_pad.flags = MEDIA_PAD_FL_SINK;
ret = media_entity_pads_init(&dev->vbi_dev.entity, 1, &dev->vbi_pad);
if (ret < 0)
pr_err("failed to initialize vbi media entity!\n");
/* Create entities for each input connector */
for (i = 0; i < AU0828_MAX_INPUT; i++) {
struct media_entity *ent = &dev->input_ent[i];
if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
break;
ent->name = inames[AUVI_INPUT(i).type];
ent->flags = MEDIA_ENT_FL_CONNECTOR;
dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
switch (AUVI_INPUT(i).type) {
case AU0828_VMUX_COMPOSITE:
ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
break;
case AU0828_VMUX_SVIDEO:
ent->function = MEDIA_ENT_F_CONN_SVIDEO;
break;
case AU0828_VMUX_CABLE:
case AU0828_VMUX_TELEVISION:
case AU0828_VMUX_DVB:
default: /* Just to shut up a warning */
ent->function = MEDIA_ENT_F_CONN_RF;
break;
}
ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
if (ret < 0)
pr_err("failed to initialize input pad[%d]!\n", i);
ret = media_device_register_entity(dev->media_dev, ent);
if (ret < 0)
pr_err("failed to register input entity %d!\n", i);
}
#endif
}
/**************************************************************************/
int au0828_analog_register(struct au0828_dev *dev,
struct usb_interface *interface)
{
int retval = -ENOMEM;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
int i, ret;
dprintk(1, "au0828_analog_register called for intf#%d!\n",
interface->cur_altsetting->desc.bInterfaceNumber);
/* No analog TV */
if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
return 0;
/* set au0828 usb interface0 to as5 */
retval = usb_set_interface(dev->usbdev,
interface->cur_altsetting->desc.bInterfaceNumber, 5);
if (retval != 0) {
pr_info("Failure setting usb interface0 to as5\n");
return retval;
}
/* Figure out which endpoint has the isoc interface */
iface_desc = interface->cur_altsetting;
for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
endpoint = &iface_desc->endpoint[i].desc;
if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
== USB_DIR_IN) &&
((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_ISOC)) {
/* we find our isoc in endpoint */
u16 tmp = le16_to_cpu(endpoint->wMaxPacketSize);
dev->max_pkt_size = (tmp & 0x07ff) *
(((tmp & 0x1800) >> 11) + 1);
dev->isoc_in_endpointaddr = endpoint->bEndpointAddress;
dprintk(1,
"Found isoc endpoint 0x%02x, max size = %d\n",
dev->isoc_in_endpointaddr, dev->max_pkt_size);
}
}
if (!(dev->isoc_in_endpointaddr)) {
pr_info("Could not locate isoc endpoint\n");
return -ENODEV;
}
init_waitqueue_head(&dev->open);
spin_lock_init(&dev->slock);
/* init video dma queues */
INIT_LIST_HEAD(&dev->vidq.active);
INIT_LIST_HEAD(&dev->vbiq.active);
timer_setup(&dev->vid_timeout, au0828_vid_buffer_timeout, 0);
timer_setup(&dev->vbi_timeout, au0828_vbi_buffer_timeout, 0);
dev->width = NTSC_STD_W;
dev->height = NTSC_STD_H;
dev->field_size = dev->width * dev->height;
dev->frame_size = dev->field_size << 1;
dev->bytesperline = dev->width << 1;
dev->vbi_width = 720;
dev->vbi_height = 1;
dev->ctrl_ainput = 0;
dev->ctrl_freq = 960;
dev->std = V4L2_STD_NTSC_M;
/* Default input is TV Tuner */
au0828_s_input(dev, 0);
mutex_init(&dev->vb_queue_lock);
mutex_init(&dev->vb_vbi_queue_lock);
/* Fill the video capture device struct */
dev->vdev = au0828_video_template;
dev->vdev.v4l2_dev = &dev->v4l2_dev;
dev->vdev.lock = &dev->lock;
dev->vdev.queue = &dev->vb_vidq;
dev->vdev.queue->lock = &dev->vb_queue_lock;
dev->vdev.device_caps =
V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
V4L2_CAP_TUNER | V4L2_CAP_VIDEO_CAPTURE;
strscpy(dev->vdev.name, "au0828a video", sizeof(dev->vdev.name));
/* Setup the VBI device */
dev->vbi_dev = au0828_video_template;
dev->vbi_dev.v4l2_dev = &dev->v4l2_dev;
dev->vbi_dev.lock = &dev->lock;
dev->vbi_dev.queue = &dev->vb_vbiq;
dev->vbi_dev.queue->lock = &dev->vb_vbi_queue_lock;
dev->vbi_dev.device_caps =
V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE;
strscpy(dev->vbi_dev.name, "au0828a vbi", sizeof(dev->vbi_dev.name));
/* Init entities at the Media Controller */
au0828_analog_create_entities(dev);
/* initialize videobuf2 stuff */
retval = au0828_vb2_setup(dev);
if (retval != 0) {
dprintk(1, "unable to setup videobuf2 queues (error = %d).\n",
retval);
return -ENODEV;
}
/* Register the v4l2 device */
video_set_drvdata(&dev->vdev, dev);
retval = video_register_device(&dev->vdev, VFL_TYPE_VIDEO, -1);
if (retval != 0) {
dprintk(1, "unable to register video device (error = %d).\n",
retval);
return -ENODEV;
}
/* Register the vbi device */
video_set_drvdata(&dev->vbi_dev, dev);
retval = video_register_device(&dev->vbi_dev, VFL_TYPE_VBI, -1);
if (retval != 0) {
dprintk(1, "unable to register vbi device (error = %d).\n",
retval);
ret = -ENODEV;
goto err_reg_vbi_dev;
}
#ifdef CONFIG_MEDIA_CONTROLLER
retval = v4l2_mc_create_media_graph(dev->media_dev);
if (retval) {
pr_err("%s() au0282_dev_register failed to create graph\n",
__func__);
ret = -ENODEV;
goto err_reg_vbi_dev;
}
#endif
dprintk(1, "%s completed!\n", __func__);
return 0;
err_reg_vbi_dev:
vb2_video_unregister_device(&dev->vdev);
return ret;
}