[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>

1 files changed, 185 insertions, 0 deletions

diff --git a/drivers/usb/media/zc0301.h b/drivers/usb/media/zc0301.h
new file mode 100644
index 000000000000..6fa5075f1e3d
--- /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_ */