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android_kernel_xiaomi_sm8350/drivers/media/video/et61x251/et61x251.h
Luca Risolia 3b2ae0be9e V4L/DVB (5766): ET61x251 driver updates 
- Make the driver depend on V4L2 only (KConfig)
- Better and safe locking mechanism of the device structure on open(),
  close() and disconnect()
- Use kref for handling device deallocation
- Generic cleanups

Signed-off-by: Luca Risolia <luca.risolia@studio.unibo.it>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2007-07-18 14:24:08 -03:00

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/***************************************************************************
* V4L2 driver for ET61X[12]51 PC Camera Controllers *
* *
* Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
* *
* 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. *
***************************************************************************/
#ifndef _ET61X251_H_
#define _ET61X251_H_
#include <linux/version.h>
#include <linux/usb.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/time.h>
#include <linux/wait.h>
#include <linux/types.h>
#include <linux/param.h>
#include <linux/rwsem.h>
#include <linux/mutex.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/kref.h>
#include "et61x251_sensor.h"
/*****************************************************************************/
#define ET61X251_DEBUG
#define ET61X251_DEBUG_LEVEL 2
#define ET61X251_MAX_DEVICES 64
#define ET61X251_PRESERVE_IMGSCALE 0
#define ET61X251_FORCE_MUNMAP 0
#define ET61X251_MAX_FRAMES 32
#define ET61X251_COMPRESSION_QUALITY 0
#define ET61X251_URBS 2
#define ET61X251_ISO_PACKETS 7
#define ET61X251_ALTERNATE_SETTING 13
#define ET61X251_URB_TIMEOUT msecs_to_jiffies(2 * ET61X251_ISO_PACKETS)
#define ET61X251_CTRL_TIMEOUT 100
#define ET61X251_FRAME_TIMEOUT 2
/*****************************************************************************/
static const struct usb_device_id et61x251_id_table[] = {
{ USB_DEVICE(0x102c, 0x6151), },
{ USB_DEVICE(0x102c, 0x6251), },
{ USB_DEVICE(0x102c, 0x6253), },
{ USB_DEVICE(0x102c, 0x6254), },
{ USB_DEVICE(0x102c, 0x6255), },
{ USB_DEVICE(0x102c, 0x6256), },
{ USB_DEVICE(0x102c, 0x6257), },
{ USB_DEVICE(0x102c, 0x6258), },
{ USB_DEVICE(0x102c, 0x6259), },
{ USB_DEVICE(0x102c, 0x625a), },
{ USB_DEVICE(0x102c, 0x625b), },
{ USB_DEVICE(0x102c, 0x625c), },
{ USB_DEVICE(0x102c, 0x625d), },
{ USB_DEVICE(0x102c, 0x625e), },
{ USB_DEVICE(0x102c, 0x625f), },
{ USB_DEVICE(0x102c, 0x6260), },
{ USB_DEVICE(0x102c, 0x6261), },
{ USB_DEVICE(0x102c, 0x6262), },
{ USB_DEVICE(0x102c, 0x6263), },
{ USB_DEVICE(0x102c, 0x6264), },
{ USB_DEVICE(0x102c, 0x6265), },
{ USB_DEVICE(0x102c, 0x6266), },
{ USB_DEVICE(0x102c, 0x6267), },
{ USB_DEVICE(0x102c, 0x6268), },
{ USB_DEVICE(0x102c, 0x6269), },
{ }
};
ET61X251_SENSOR_TABLE
/*****************************************************************************/
enum et61x251_frame_state {
F_UNUSED,
F_QUEUED,
F_GRABBING,
F_DONE,
F_ERROR,
};
struct et61x251_frame_t {
void* bufmem;
struct v4l2_buffer buf;
enum et61x251_frame_state state;
struct list_head frame;
unsigned long vma_use_count;
};
enum et61x251_dev_state {
DEV_INITIALIZED = 0x01,
DEV_DISCONNECTED = 0x02,
DEV_MISCONFIGURED = 0x04,
};
enum et61x251_io_method {
IO_NONE,
IO_READ,
IO_MMAP,
};
enum et61x251_stream_state {
STREAM_OFF,
STREAM_INTERRUPT,
STREAM_ON,
};
struct et61x251_sysfs_attr {
u8 reg, i2c_reg;
};
struct et61x251_module_param {
u8 force_munmap;
u16 frame_timeout;
};
static DEFINE_MUTEX(et61x251_sysfs_lock);
static DECLARE_RWSEM(et61x251_dev_lock);
struct et61x251_device {
struct video_device* v4ldev;
struct et61x251_sensor sensor;
struct usb_device* usbdev;
struct urb* urb[ET61X251_URBS];
void* transfer_buffer[ET61X251_URBS];
u8* control_buffer;
struct et61x251_frame_t *frame_current, frame[ET61X251_MAX_FRAMES];
struct list_head inqueue, outqueue;
u32 frame_count, nbuffers, nreadbuffers;
enum et61x251_io_method io;
enum et61x251_stream_state stream;
struct v4l2_jpegcompression compression;
struct et61x251_sysfs_attr sysfs;
struct et61x251_module_param module_param;
struct kref kref;
enum et61x251_dev_state state;
u8 users;
struct completion probe;
struct mutex open_mutex, fileop_mutex;
spinlock_t queue_lock;
wait_queue_head_t wait_open, wait_frame, wait_stream;
};
/*****************************************************************************/
struct et61x251_device*
et61x251_match_id(struct et61x251_device* cam, const struct usb_device_id *id)
{
return usb_match_id(usb_ifnum_to_if(cam->usbdev, 0), id) ? cam : NULL;
}
void
et61x251_attach_sensor(struct et61x251_device* cam,
const struct et61x251_sensor* sensor)
{
memcpy(&cam->sensor, sensor, sizeof(struct et61x251_sensor));
}
/*****************************************************************************/
#undef DBG
#undef KDBG
#ifdef ET61X251_DEBUG
# define DBG(level, fmt, args...) \
do { \
if (debug >= (level)) { \
if ((level) == 1) \
dev_err(&cam->usbdev->dev, fmt "\n", ## args); \
else if ((level) == 2) \
dev_info(&cam->usbdev->dev, fmt "\n", ## args); \
else if ((level) >= 3) \
dev_info(&cam->usbdev->dev, "[%s:%s:%d] " fmt "\n", \
__FILE__, __FUNCTION__, __LINE__ , ## args); \
} \
} while (0)
# define KDBG(level, fmt, args...) \
do { \
if (debug >= (level)) { \
if ((level) == 1 || (level) == 2) \
pr_info("et61x251: " fmt "\n", ## args); \
else if ((level) == 3) \
pr_debug("sn9c102: [%s:%s:%d] " fmt "\n", __FILE__, \
__FUNCTION__, __LINE__ , ## args); \
} \
} while (0)
# define V4LDBG(level, name, cmd) \
do { \
if (debug >= (level)) \
v4l_print_ioctl(name, cmd); \
} while (0)
#else
# define DBG(level, fmt, args...) do {;} while(0)
# define KDBG(level, fmt, args...) do {;} while(0)
# define V4LDBG(level, name, cmd) do {;} while(0)
#endif
#undef PDBG
#define PDBG(fmt, args...) \
dev_info(&cam->usbdev->dev, "[%s:%s:%d] " fmt "\n", __FILE__, __FUNCTION__, \
__LINE__ , ## args)
#undef PDBGG
#define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
#endif /* _ET61X251_H_ */
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