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193 lines
6.3 KiB
C
193 lines
6.3 KiB
C
/***************************************************************************
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* V4L2 driver for ZC0301 Image Processor and Control Chip *
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* *
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* Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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***************************************************************************/
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#ifndef _ZC0301_H_
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#define _ZC0301_H_
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#include <linux/version.h>
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#include <linux/usb.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-common.h>
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#include <linux/device.h>
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/time.h>
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#include <linux/wait.h>
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#include <linux/types.h>
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#include <linux/param.h>
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#include <linux/mutex.h>
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#include <linux/rwsem.h>
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#include <linux/stddef.h>
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#include <linux/string.h>
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#include "zc0301_sensor.h"
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/*****************************************************************************/
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#define ZC0301_DEBUG
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#define ZC0301_DEBUG_LEVEL 2
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#define ZC0301_MAX_DEVICES 64
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#define ZC0301_FORCE_MUNMAP 0
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#define ZC0301_MAX_FRAMES 32
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#define ZC0301_COMPRESSION_QUALITY 0
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#define ZC0301_URBS 2
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#define ZC0301_ISO_PACKETS 7
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#define ZC0301_ALTERNATE_SETTING 7
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#define ZC0301_URB_TIMEOUT msecs_to_jiffies(2 * ZC0301_ISO_PACKETS)
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#define ZC0301_CTRL_TIMEOUT 100
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#define ZC0301_FRAME_TIMEOUT 2
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/*****************************************************************************/
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ZC0301_ID_TABLE
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ZC0301_SENSOR_TABLE
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enum zc0301_frame_state {
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F_UNUSED,
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F_QUEUED,
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F_GRABBING,
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F_DONE,
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F_ERROR,
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};
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struct zc0301_frame_t {
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void* bufmem;
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struct v4l2_buffer buf;
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enum zc0301_frame_state state;
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struct list_head frame;
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unsigned long vma_use_count;
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};
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enum zc0301_dev_state {
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DEV_INITIALIZED = 0x01,
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DEV_DISCONNECTED = 0x02,
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DEV_MISCONFIGURED = 0x04,
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};
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enum zc0301_io_method {
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IO_NONE,
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IO_READ,
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IO_MMAP,
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};
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enum zc0301_stream_state {
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STREAM_OFF,
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STREAM_INTERRUPT,
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STREAM_ON,
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};
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struct zc0301_module_param {
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u8 force_munmap;
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u16 frame_timeout;
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};
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static DECLARE_RWSEM(zc0301_disconnect);
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struct zc0301_device {
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struct video_device* v4ldev;
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struct zc0301_sensor sensor;
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struct usb_device* usbdev;
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struct urb* urb[ZC0301_URBS];
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void* transfer_buffer[ZC0301_URBS];
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u8* control_buffer;
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struct zc0301_frame_t *frame_current, frame[ZC0301_MAX_FRAMES];
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struct list_head inqueue, outqueue;
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u32 frame_count, nbuffers, nreadbuffers;
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enum zc0301_io_method io;
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enum zc0301_stream_state stream;
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struct v4l2_jpegcompression compression;
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struct zc0301_module_param module_param;
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enum zc0301_dev_state state;
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u8 users;
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struct mutex dev_mutex, fileop_mutex;
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spinlock_t queue_lock;
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wait_queue_head_t open, wait_frame, wait_stream;
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};
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/*****************************************************************************/
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struct zc0301_device*
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zc0301_match_id(struct zc0301_device* cam, const struct usb_device_id *id)
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{
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return usb_match_id(usb_ifnum_to_if(cam->usbdev, 0), id) ? cam : NULL;
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}
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void
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zc0301_attach_sensor(struct zc0301_device* cam, struct zc0301_sensor* sensor)
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{
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memcpy(&cam->sensor, sensor, sizeof(struct zc0301_sensor));
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}
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/*****************************************************************************/
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#undef DBG
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#undef KDBG
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#ifdef ZC0301_DEBUG
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# define DBG(level, fmt, args...) \
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do { \
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if (debug >= (level)) { \
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if ((level) == 1) \
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dev_err(&cam->usbdev->dev, fmt "\n", ## args); \
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else if ((level) == 2) \
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dev_info(&cam->usbdev->dev, fmt "\n", ## args); \
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else if ((level) >= 3) \
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dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n", \
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__FUNCTION__, __LINE__ , ## args); \
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} \
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} while (0)
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# define KDBG(level, fmt, args...) \
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do { \
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if (debug >= (level)) { \
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if ((level) == 1 || (level) == 2) \
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pr_info("zc0301: " fmt "\n", ## args); \
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else if ((level) == 3) \
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pr_debug("zc0301: [%s:%d] " fmt "\n", __FUNCTION__, \
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__LINE__ , ## args); \
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} \
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} while (0)
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# define V4LDBG(level, name, cmd) \
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do { \
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if (debug >= (level)) \
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v4l_print_ioctl(name, cmd); \
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} while (0)
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#else
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# define DBG(level, fmt, args...) do {;} while(0)
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# define KDBG(level, fmt, args...) do {;} while(0)
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# define V4LDBG(level, name, cmd) do {;} while(0)
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#endif
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#undef PDBG
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#define PDBG(fmt, args...) \
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dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n", \
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__FUNCTION__, __LINE__ , ## args)
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#undef PDBGG
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#define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
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#endif /* _ZC0301_H_ */
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