[PATCH] USB: Add ZC0301 Video4Linux2 driver
This patch adds a Video4Linux2 driver for ZC0301
Image Processor and Control Chip.
Signed-off-by: Luca Risolia <luca.risolia@studio.unibo.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/media/zc0301.h b/drivers/usb/media/zc0301.h
new file mode 100644
index 0000000..6fa5075
--- /dev/null
+++ b/drivers/usb/media/zc0301.h
@@ -0,0 +1,185 @@
+/***************************************************************************
+ * V4L2 driver for ZC0301 Image Processor and Control Chip *
+ * *
+ * 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 _ZC0301_H_
+#define _ZC0301_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/mutex.h>
+#include <linux/rwsem.h>
+#include <asm/semaphore.h>
+
+#include "zc0301_sensor.h"
+
+/*****************************************************************************/
+
+#define ZC0301_DEBUG
+#define ZC0301_DEBUG_LEVEL 2
+#define ZC0301_MAX_DEVICES 64
+#define ZC0301_FORCE_MUNMAP 0
+#define ZC0301_MAX_FRAMES 32
+#define ZC0301_COMPRESSION_QUALITY 2
+#define ZC0301_URBS 2
+#define ZC0301_ISO_PACKETS 7
+#define ZC0301_ALTERNATE_SETTING 7
+#define ZC0301_URB_TIMEOUT msecs_to_jiffies(2 * ZC0301_ISO_PACKETS)
+#define ZC0301_CTRL_TIMEOUT 100
+#define ZC0301_FRAME_TIMEOUT 2 * 1000 * msecs_to_jiffies(1)
+
+/*****************************************************************************/
+
+ZC0301_ID_TABLE
+ZC0301_SENSOR_TABLE
+
+enum zc0301_frame_state {
+ F_UNUSED,
+ F_QUEUED,
+ F_GRABBING,
+ F_DONE,
+ F_ERROR,
+};
+
+struct zc0301_frame_t {
+ void* bufmem;
+ struct v4l2_buffer buf;
+ enum zc0301_frame_state state;
+ struct list_head frame;
+ unsigned long vma_use_count;
+};
+
+enum zc0301_dev_state {
+ DEV_INITIALIZED = 0x01,
+ DEV_DISCONNECTED = 0x02,
+ DEV_MISCONFIGURED = 0x04,
+};
+
+enum zc0301_io_method {
+ IO_NONE,
+ IO_READ,
+ IO_MMAP,
+};
+
+enum zc0301_stream_state {
+ STREAM_OFF,
+ STREAM_INTERRUPT,
+ STREAM_ON,
+};
+
+struct zc0301_module_param {
+ u8 force_munmap;
+};
+
+static DECLARE_RWSEM(zc0301_disconnect);
+
+struct zc0301_device {
+ struct video_device* v4ldev;
+
+ struct zc0301_sensor* sensor;
+
+ struct usb_device* usbdev;
+ struct urb* urb[ZC0301_URBS];
+ void* transfer_buffer[ZC0301_URBS];
+ u8* control_buffer;
+
+ struct zc0301_frame_t *frame_current, frame[ZC0301_MAX_FRAMES];
+ struct list_head inqueue, outqueue;
+ u32 frame_count, nbuffers, nreadbuffers;
+
+ enum zc0301_io_method io;
+ enum zc0301_stream_state stream;
+
+ struct v4l2_jpegcompression compression;
+
+ struct zc0301_module_param module_param;
+
+ enum zc0301_dev_state state;
+ u8 users;
+
+ struct mutex dev_mutex, fileop_mutex;
+ spinlock_t queue_lock;
+ wait_queue_head_t open, wait_frame, wait_stream;
+};
+
+/*****************************************************************************/
+
+void
+zc0301_attach_sensor(struct zc0301_device* cam, struct zc0301_sensor* sensor)
+{
+ cam->sensor = sensor;
+ cam->sensor->usbdev = cam->usbdev;
+}
+
+/*****************************************************************************/
+
+#undef DBG
+#undef KDBG
+#ifdef ZC0301_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:%d] " fmt "\n", \
+ __FUNCTION__, __LINE__ , ## args); \
+ } \
+} while (0)
+# define KDBG(level, fmt, args...) \
+do { \
+ if (debug >= (level)) { \
+ if ((level) == 1 || (level) == 2) \
+ pr_info("zc0301: " fmt "\n", ## args); \
+ else if ((level) == 3) \
+ pr_debug("zc0301: [%s:%d] " fmt "\n", __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:%d] " fmt "\n", \
+ __FUNCTION__, __LINE__ , ## args)
+
+#undef PDBGG
+#define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
+
+#endif /* _ZC0301_H_ */