Commit a3550ea6 authored by Federico Simoncelli's avatar Federico Simoncelli Committed by Mauro Carvalho Chehab

[media] usbtv: split core and video implementation

Signed-off-by: default avatarFederico Simoncelli <fsimonce@redhat.com>
Reviewed-by: default avatarLubomir Rintel <lkundrak@v3.sk>
Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent c29b8f31
usbtv-y := usbtv-core.o \
usbtv-video.o
obj-$(CONFIG_VIDEO_USBTV) += usbtv.o
/*
* Fushicai USBTV007 Video Grabber Driver
*
* Product web site:
* http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html
*
* Following LWN articles were very useful in construction of this driver:
* Video4Linux2 API series: http://lwn.net/Articles/203924/
* videobuf2 API explanation: http://lwn.net/Articles/447435/
* Thanks go to Jonathan Corbet for providing this quality documentation.
* He is awesome.
*
* Copyright (c) 2013 Lubomir Rintel
* All rights reserved.
* No physical hardware was harmed running Windows during the
* reverse-engineering activity
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL").
*/
#include <linux/module.h>
#include "usbtv.h"
int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size)
{
int ret;
int pipe = usb_rcvctrlpipe(usbtv->udev, 0);
int i;
for (i = 0; i < size; i++) {
u16 index = regs[i][0];
u16 value = regs[i][1];
ret = usb_control_msg(usbtv->udev, pipe, USBTV_REQUEST_REG,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value, index, NULL, 0, 0);
if (ret < 0)
return ret;
}
return 0;
}
static int usbtv_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
int ret;
int size;
struct device *dev = &intf->dev;
struct usbtv *usbtv;
/* Checks that the device is what we think it is. */
if (intf->num_altsetting != 2)
return -ENODEV;
if (intf->altsetting[1].desc.bNumEndpoints != 4)
return -ENODEV;
/* Packet size is split into 11 bits of base size and count of
* extra multiplies of it.*/
size = usb_endpoint_maxp(&intf->altsetting[1].endpoint[0].desc);
size = (size & 0x07ff) * (((size & 0x1800) >> 11) + 1);
/* Device structure */
usbtv = kzalloc(sizeof(struct usbtv), GFP_KERNEL);
if (usbtv == NULL)
return -ENOMEM;
usbtv->dev = dev;
usbtv->udev = usb_get_dev(interface_to_usbdev(intf));
usbtv->iso_size = size;
usb_set_intfdata(intf, usbtv);
ret = usbtv_video_init(usbtv);
if (ret < 0)
goto usbtv_video_fail;
/* for simplicity we exploit the v4l2_device reference counting */
v4l2_device_get(&usbtv->v4l2_dev);
dev_info(dev, "Fushicai USBTV007 Video Grabber\n");
return 0;
usbtv_video_fail:
kfree(usbtv);
return ret;
}
static void usbtv_disconnect(struct usb_interface *intf)
{
struct usbtv *usbtv = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
if (!usbtv)
return;
usbtv_video_free(usbtv);
usb_put_dev(usbtv->udev);
usbtv->udev = NULL;
/* the usbtv structure will be deallocated when v4l2 will be
done using it */
v4l2_device_put(&usbtv->v4l2_dev);
}
struct usb_device_id usbtv_id_table[] = {
{ USB_DEVICE(0x1b71, 0x3002) },
{}
};
MODULE_DEVICE_TABLE(usb, usbtv_id_table);
MODULE_AUTHOR("Lubomir Rintel");
MODULE_DESCRIPTION("Fushicai USBTV007 Video Grabber Driver");
MODULE_LICENSE("Dual BSD/GPL");
struct usb_driver usbtv_usb_driver = {
.name = "usbtv",
.id_table = usbtv_id_table,
.probe = usbtv_probe,
.disconnect = usbtv_disconnect,
};
module_usb_driver(usbtv_usb_driver);
......@@ -28,45 +28,10 @@
* GNU General Public License ("GPL").
*/
#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-core.h>
#include <media/videobuf2-vmalloc.h>
/* Hardware. */
#define USBTV_VIDEO_ENDP 0x81
#define USBTV_BASE 0xc000
#define USBTV_REQUEST_REG 12
/* Number of concurrent isochronous urbs submitted.
* Higher numbers was seen to overly saturate the USB bus. */
#define USBTV_ISOC_TRANSFERS 16
#define USBTV_ISOC_PACKETS 8
#define USBTV_CHUNK_SIZE 256
#define USBTV_CHUNK 240
/* Chunk header. */
#define USBTV_MAGIC_OK(chunk) ((be32_to_cpu(chunk[0]) & 0xff000000) \
== 0x88000000)
#define USBTV_FRAME_ID(chunk) ((be32_to_cpu(chunk[0]) & 0x00ff0000) >> 16)
#define USBTV_ODD(chunk) ((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15)
#define USBTV_CHUNK_NO(chunk) (be32_to_cpu(chunk[0]) & 0x00000fff)
#define USBTV_TV_STD (V4L2_STD_525_60 | V4L2_STD_PAL)
/* parameters for supported TV norms */
struct usbtv_norm_params {
v4l2_std_id norm;
int cap_width, cap_height;
};
#include "usbtv.h"
static struct usbtv_norm_params norm_params[] = {
{
......@@ -81,43 +46,6 @@ static struct usbtv_norm_params norm_params[] = {
}
};
/* A single videobuf2 frame buffer. */
struct usbtv_buf {
struct vb2_buffer vb;
struct list_head list;
};
/* Per-device structure. */
struct usbtv {
struct device *dev;
struct usb_device *udev;
struct v4l2_device v4l2_dev;
struct video_device vdev;
struct vb2_queue vb2q;
struct mutex v4l2_lock;
struct mutex vb2q_lock;
/* List of videobuf2 buffers protected by a lock. */
spinlock_t buflock;
struct list_head bufs;
/* Number of currently processed frame, useful find
* out when a new one begins. */
u32 frame_id;
int chunks_done;
enum {
USBTV_COMPOSITE_INPUT,
USBTV_SVIDEO_INPUT,
} input;
v4l2_std_id norm;
int width, height;
int n_chunks;
int iso_size;
unsigned int sequence;
struct urb *isoc_urbs[USBTV_ISOC_TRANSFERS];
};
static int usbtv_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm)
{
int i, ret = 0;
......@@ -142,26 +70,6 @@ static int usbtv_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm)
return ret;
}
static int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size)
{
int ret;
int pipe = usb_rcvctrlpipe(usbtv->udev, 0);
int i;
for (i = 0; i < size; i++) {
u16 index = regs[i][0];
u16 value = regs[i][1];
ret = usb_control_msg(usbtv->udev, pipe, USBTV_REQUEST_REG,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value, index, NULL, 0, 0);
if (ret < 0)
return ret;
}
return 0;
}
static int usbtv_select_input(struct usbtv *usbtv, int input)
{
int ret;
......@@ -560,12 +468,6 @@ static int usbtv_start(struct usbtv *usbtv)
return ret;
}
struct usb_device_id usbtv_id_table[] = {
{ USB_DEVICE(0x1b71, 0x3002) },
{}
};
MODULE_DEVICE_TABLE(usb, usbtv_id_table);
static int usbtv_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
......@@ -759,33 +661,9 @@ static void usbtv_release(struct v4l2_device *v4l2_dev)
kfree(usbtv);
}
static int usbtv_probe(struct usb_interface *intf,
const struct usb_device_id *id)
int usbtv_video_init(struct usbtv *usbtv)
{
int ret;
int size;
struct device *dev = &intf->dev;
struct usbtv *usbtv;
/* Checks that the device is what we think it is. */
if (intf->num_altsetting != 2)
return -ENODEV;
if (intf->altsetting[1].desc.bNumEndpoints != 4)
return -ENODEV;
/* Packet size is split into 11 bits of base size and count of
* extra multiplies of it.*/
size = usb_endpoint_maxp(&intf->altsetting[1].endpoint[0].desc);
size = (size & 0x07ff) * (((size & 0x1800) >> 11) + 1);
/* Device structure */
usbtv = kzalloc(sizeof(struct usbtv), GFP_KERNEL);
if (usbtv == NULL)
return -ENOMEM;
usbtv->dev = dev;
usbtv->udev = usb_get_dev(interface_to_usbdev(intf));
usbtv->iso_size = size;
(void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60);
......@@ -805,20 +683,18 @@ static int usbtv_probe(struct usb_interface *intf,
usbtv->vb2q.lock = &usbtv->vb2q_lock;
ret = vb2_queue_init(&usbtv->vb2q);
if (ret < 0) {
dev_warn(dev, "Could not initialize videobuf2 queue\n");
goto usbtv_fail;
dev_warn(usbtv->dev, "Could not initialize videobuf2 queue\n");
return ret;
}
/* v4l2 structure */
usbtv->v4l2_dev.release = usbtv_release;
ret = v4l2_device_register(dev, &usbtv->v4l2_dev);
ret = v4l2_device_register(usbtv->dev, &usbtv->v4l2_dev);
if (ret < 0) {
dev_warn(dev, "Could not register v4l2 device\n");
dev_warn(usbtv->dev, "Could not register v4l2 device\n");
goto v4l2_fail;
}
usb_set_intfdata(intf, usbtv);
/* Video structure */
strlcpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name));
usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev;
......@@ -832,52 +708,31 @@ static int usbtv_probe(struct usb_interface *intf,
video_set_drvdata(&usbtv->vdev, usbtv);
ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1);
if (ret < 0) {
dev_warn(dev, "Could not register video device\n");
dev_warn(usbtv->dev, "Could not register video device\n");
goto vdev_fail;
}
dev_info(dev, "Fushicai USBTV007 Video Grabber\n");
return 0;
vdev_fail:
v4l2_device_unregister(&usbtv->v4l2_dev);
v4l2_fail:
vb2_queue_release(&usbtv->vb2q);
usbtv_fail:
kfree(usbtv);
return ret;
}
static void usbtv_disconnect(struct usb_interface *intf)
void usbtv_video_free(struct usbtv *usbtv)
{
struct usbtv *usbtv = usb_get_intfdata(intf);
mutex_lock(&usbtv->vb2q_lock);
mutex_lock(&usbtv->v4l2_lock);
usbtv_stop(usbtv);
usb_set_intfdata(intf, NULL);
video_unregister_device(&usbtv->vdev);
v4l2_device_disconnect(&usbtv->v4l2_dev);
usb_put_dev(usbtv->udev);
usbtv->udev = NULL;
mutex_unlock(&usbtv->v4l2_lock);
mutex_unlock(&usbtv->vb2q_lock);
v4l2_device_put(&usbtv->v4l2_dev);
}
MODULE_AUTHOR("Lubomir Rintel");
MODULE_DESCRIPTION("Fushicai USBTV007 Video Grabber Driver");
MODULE_LICENSE("Dual BSD/GPL");
struct usb_driver usbtv_usb_driver = {
.name = "usbtv",
.id_table = usbtv_id_table,
.probe = usbtv_probe,
.disconnect = usbtv_disconnect,
};
module_usb_driver(usbtv_usb_driver);
/*
* Fushicai USBTV007 Video Grabber Driver
*
* Copyright (c) 2013 Lubomir Rintel
* All rights reserved.
* No physical hardware was harmed running Windows during the
* reverse-engineering activity
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL").
*/
#include <linux/slab.h>
#include <linux/usb.h>
#include <media/v4l2-device.h>
#include <media/videobuf2-vmalloc.h>
/* Hardware. */
#define USBTV_VIDEO_ENDP 0x81
#define USBTV_BASE 0xc000
#define USBTV_REQUEST_REG 12
/* Number of concurrent isochronous urbs submitted.
* Higher numbers was seen to overly saturate the USB bus. */
#define USBTV_ISOC_TRANSFERS 16
#define USBTV_ISOC_PACKETS 8
#define USBTV_CHUNK_SIZE 256
#define USBTV_CHUNK 240
/* Chunk header. */
#define USBTV_MAGIC_OK(chunk) ((be32_to_cpu(chunk[0]) & 0xff000000) \
== 0x88000000)
#define USBTV_FRAME_ID(chunk) ((be32_to_cpu(chunk[0]) & 0x00ff0000) >> 16)
#define USBTV_ODD(chunk) ((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15)
#define USBTV_CHUNK_NO(chunk) (be32_to_cpu(chunk[0]) & 0x00000fff)
#define USBTV_TV_STD (V4L2_STD_525_60 | V4L2_STD_PAL)
/* parameters for supported TV norms */
struct usbtv_norm_params {
v4l2_std_id norm;
int cap_width, cap_height;
};
/* A single videobuf2 frame buffer. */
struct usbtv_buf {
struct vb2_buffer vb;
struct list_head list;
};
/* Per-device structure. */
struct usbtv {
struct device *dev;
struct usb_device *udev;
/* video */
struct v4l2_device v4l2_dev;
struct video_device vdev;
struct vb2_queue vb2q;
struct mutex v4l2_lock;
struct mutex vb2q_lock;
/* List of videobuf2 buffers protected by a lock. */
spinlock_t buflock;
struct list_head bufs;
/* Number of currently processed frame, useful find
* out when a new one begins. */
u32 frame_id;
int chunks_done;
enum {
USBTV_COMPOSITE_INPUT,
USBTV_SVIDEO_INPUT,
} input;
v4l2_std_id norm;
int width, height;
int n_chunks;
int iso_size;
unsigned int sequence;
struct urb *isoc_urbs[USBTV_ISOC_TRANSFERS];
};
int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size);
int usbtv_video_init(struct usbtv *usbtv);
void usbtv_video_free(struct usbtv *usbtv);
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