s2255drv.c 67.9 KB
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/*
 *  s2255drv.c - a driver for the Sensoray 2255 USB video capture device
 *
 *   Copyright (C) 2007-2008 by Sensoray Company Inc.
 *                              Dean Anderson
 *
 * Some video buffer code based on vivi driver:
 *
 * Sensoray 2255 device supports 4 simultaneous channels.
 * The channels are not "crossbar" inputs, they are physically
 * attached to separate video decoders.
 *
 * Because of USB2.0 bandwidth limitations. There is only a
 * certain amount of data which may be transferred at one time.
 *
 * Example maximum bandwidth utilization:
 *
 * -full size, color mode YUYV or YUV422P: 2 channels at once
 *
 * -full or half size Grey scale: all 4 channels at once
 *
 * -half size, color mode YUYV or YUV422P: all 4 channels at once
 *
 * -full size, color mode YUYV or YUV422P 1/2 frame rate: all 4 channels
 *  at once.
 *  (TODO: Incorporate videodev2 frame rate(FR) enumeration,
 *  which is currently experimental.)
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/firmware.h>
#include <linux/kernel.h>
#include <linux/mutex.h>
#include <linux/videodev2.h>
#include <linux/version.h>
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#include <linux/mm.h>
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#include <media/videobuf-vmalloc.h>
#include <media/v4l2-common.h>
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#include <media/v4l2-ioctl.h>
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#include <linux/vmalloc.h>
#include <linux/usb.h>

#define FIRMWARE_FILE_NAME "f2255usb.bin"



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/* default JPEG quality */
#define S2255_DEF_JPEG_QUAL     50
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/* vendor request in */
#define S2255_VR_IN		0
/* vendor request out */
#define S2255_VR_OUT		1
/* firmware query */
#define S2255_VR_FW		0x30
/* USB endpoint number for configuring the device */
#define S2255_CONFIG_EP         2
/* maximum time for DSP to start responding after last FW word loaded(ms) */
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#define S2255_DSP_BOOTTIME      800
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/* maximum time to wait for firmware to load (ms) */
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#define S2255_LOAD_TIMEOUT      (5000 + S2255_DSP_BOOTTIME)
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#define S2255_DEF_BUFS          16
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#define S2255_SETMODE_TIMEOUT   500
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#define MAX_CHANNELS		4
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#define S2255_MARKER_FRAME	0x2255DA4AL
#define S2255_MARKER_RESPONSE	0x2255ACACL
#define S2255_USB_XFER_SIZE	(16 * 1024)
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#define MAX_CHANNELS		4
#define MAX_PIPE_BUFFERS	1
#define SYS_FRAMES		4
/* maximum size is PAL full size plus room for the marker header(s) */
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#define SYS_FRAMES_MAXSIZE	(720*288*2*2 + 4096)
#define DEF_USB_BLOCK		S2255_USB_XFER_SIZE
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#define LINE_SZ_4CIFS_NTSC	640
#define LINE_SZ_2CIFS_NTSC	640
#define LINE_SZ_1CIFS_NTSC	320
#define LINE_SZ_4CIFS_PAL	704
#define LINE_SZ_2CIFS_PAL	704
#define LINE_SZ_1CIFS_PAL	352
#define NUM_LINES_4CIFS_NTSC	240
#define NUM_LINES_2CIFS_NTSC	240
#define NUM_LINES_1CIFS_NTSC	240
#define NUM_LINES_4CIFS_PAL	288
#define NUM_LINES_2CIFS_PAL	288
#define NUM_LINES_1CIFS_PAL	288
#define LINE_SZ_DEF		640
#define NUM_LINES_DEF		240


/* predefined settings */
#define FORMAT_NTSC	1
#define FORMAT_PAL	2

#define SCALE_4CIFS	1	/* 640x480(NTSC) or 704x576(PAL) */
#define SCALE_2CIFS	2	/* 640x240(NTSC) or 704x288(PAL) */
#define SCALE_1CIFS	3	/* 320x240(NTSC) or 352x288(PAL) */

#define COLOR_YUVPL	1	/* YUV planar */
#define COLOR_YUVPK	2	/* YUV packed */
#define COLOR_Y8	4	/* monochrome */
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#define COLOR_JPG       5       /* JPEG */
#define MASK_COLOR      0xff
#define MASK_JPG_QUALITY 0xff00
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/* frame decimation. Not implemented by V4L yet(experimental in V4L) */
#define FDEC_1		1	/* capture every frame. default */
#define FDEC_2		2	/* capture every 2nd frame */
#define FDEC_3		3	/* capture every 3rd frame */
#define FDEC_5		5	/* capture every 5th frame */

/*-------------------------------------------------------
 * Default mode parameters.
 *-------------------------------------------------------*/
#define DEF_SCALE	SCALE_4CIFS
#define DEF_COLOR	COLOR_YUVPL
#define DEF_FDEC	FDEC_1
#define DEF_BRIGHT	0
#define DEF_CONTRAST	0x5c
#define DEF_SATURATION	0x80
#define DEF_HUE		0

/* usb config commands */
#define IN_DATA_TOKEN	0x2255c0de
#define CMD_2255	0xc2255000
#define CMD_SET_MODE	(CMD_2255 | 0x10)
#define CMD_START	(CMD_2255 | 0x20)
#define CMD_STOP	(CMD_2255 | 0x30)
#define CMD_STATUS	(CMD_2255 | 0x40)

struct s2255_mode {
	u32 format;	/* input video format (NTSC, PAL) */
	u32 scale;	/* output video scale */
	u32 color;	/* output video color format */
	u32 fdec;	/* frame decimation */
	u32 bright;	/* brightness */
	u32 contrast;	/* contrast */
	u32 saturation;	/* saturation */
	u32 hue;	/* hue (NTSC only)*/
	u32 single;	/* capture 1 frame at a time (!=0), continuously (==0)*/
	u32 usb_block;	/* block size. should be 4096 of DEF_USB_BLOCK */
	u32 restart;	/* if DSP requires restart */
};


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#define S2255_READ_IDLE		0
#define S2255_READ_FRAME	1
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/* frame structure */
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struct s2255_framei {
	unsigned long size;
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	unsigned long ulState;	/* ulState:S2255_READ_IDLE, S2255_READ_FRAME*/
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	void *lpvbits;		/* image data */
	unsigned long cur_size;	/* current data copied to it */
};

/* image buffer structure */
struct s2255_bufferi {
	unsigned long dwFrames;			/* number of frames in buffer */
	struct s2255_framei frame[SYS_FRAMES];	/* array of FRAME structures */
};

#define DEF_MODEI_NTSC_CONT	{FORMAT_NTSC, DEF_SCALE, DEF_COLOR,	\
			DEF_FDEC, DEF_BRIGHT, DEF_CONTRAST, DEF_SATURATION, \
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			DEF_HUE, 0, DEF_USB_BLOCK, 0}
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struct s2255_dmaqueue {
	struct list_head	active;
	/* thread for acquisition */
	struct task_struct	*kthread;
	int			frame;
	struct s2255_dev	*dev;
	int			channel;
};

/* for firmware loading, fw_state */
#define S2255_FW_NOTLOADED	0
#define S2255_FW_LOADED_DSPWAIT	1
#define S2255_FW_SUCCESS	2
#define S2255_FW_FAILED		3
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#define S2255_FW_DISCONNECTING  4
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#define S2255_FW_MARKER		cpu_to_le32(0x22552f2f)
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/* 2255 read states */
#define S2255_READ_IDLE         0
#define S2255_READ_FRAME        1
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struct s2255_fw {
	int		      fw_loaded;
	int		      fw_size;
	struct urb	      *fw_urb;
	atomic_t	      fw_state;
	void		      *pfw_data;
	wait_queue_head_t     wait_fw;
	const struct firmware *fw;
};

struct s2255_pipeinfo {
	u32 max_transfer_size;
	u32 cur_transfer_size;
	u8 *transfer_buffer;
	u32 transfer_flags;;
	u32 state;
	u32 prev_state;
	u32 urb_size;
	void *stream_urb;
	void *dev;	/* back pointer to s2255_dev struct*/
	u32 err_count;
	u32 buf_index;
	u32 idx;
	u32 priority_set;
};

struct s2255_fmt; /*forward declaration */

struct s2255_dev {
	int			frames;
	int			users[MAX_CHANNELS];
	struct mutex		lock;
	struct mutex		open_lock;
	int			resources[MAX_CHANNELS];
	struct usb_device	*udev;
	struct usb_interface	*interface;
	u8			read_endpoint;

	struct s2255_dmaqueue	vidq[MAX_CHANNELS];
	struct video_device	*vdev[MAX_CHANNELS];
	struct list_head	s2255_devlist;
	struct timer_list	timer;
	struct s2255_fw	*fw_data;
	int			board_num;
	int			is_open;
	struct s2255_pipeinfo	pipes[MAX_PIPE_BUFFERS];
	struct s2255_bufferi		buffer[MAX_CHANNELS];
	struct s2255_mode	mode[MAX_CHANNELS];
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	/* jpeg compression */
	struct v4l2_jpegcompression jc[MAX_CHANNELS];
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	const struct s2255_fmt	*cur_fmt[MAX_CHANNELS];
	int			cur_frame[MAX_CHANNELS];
	int			last_frame[MAX_CHANNELS];
	u32			cc;	/* current channel */
	int			b_acquire[MAX_CHANNELS];
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	/* allocated image size */
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	unsigned long		req_image_size[MAX_CHANNELS];
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	/* received packet size */
	unsigned long		pkt_size[MAX_CHANNELS];
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	int			bad_payload[MAX_CHANNELS];
	unsigned long		frame_count[MAX_CHANNELS];
	int			frame_ready;
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	/* if JPEG image */
	int                     jpg_size[MAX_CHANNELS];
	/* if channel configured to default state */
	int                     chn_configured[MAX_CHANNELS];
	wait_queue_head_t       wait_setmode[MAX_CHANNELS];
	int                     setmode_ready[MAX_CHANNELS];
	int                     chn_ready;
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	struct kref		kref;
	spinlock_t              slock;
};
#define to_s2255_dev(d) container_of(d, struct s2255_dev, kref)

struct s2255_fmt {
	char *name;
	u32 fourcc;
	int depth;
};

/* buffer for one video frame */
struct s2255_buffer {
	/* common v4l buffer stuff -- must be first */
	struct videobuf_buffer vb;
	const struct s2255_fmt *fmt;
};

struct s2255_fh {
	struct s2255_dev	*dev;
	const struct s2255_fmt	*fmt;
	unsigned int		width;
	unsigned int		height;
	struct videobuf_queue	vb_vidq;
	enum v4l2_buf_type	type;
	int			channel;
	/* mode below is the desired mode.
	   mode in s2255_dev is the current mode that was last set */
	struct s2255_mode	mode;
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	int			resources[MAX_CHANNELS];
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};

#define CUR_USB_FWVER	774	/* current cypress EEPROM firmware version */
#define S2255_MAJOR_VERSION	1
#define S2255_MINOR_VERSION	13
#define S2255_RELEASE		0
#define S2255_VERSION		KERNEL_VERSION(S2255_MAJOR_VERSION, \
					       S2255_MINOR_VERSION, \
					       S2255_RELEASE)

/* vendor ids */
#define USB_S2255_VENDOR_ID	0x1943
#define USB_S2255_PRODUCT_ID	0x2255
#define S2255_NORMS		(V4L2_STD_PAL | V4L2_STD_NTSC)
/* frame prefix size (sent once every frame) */
#define PREFIX_SIZE		512

/* Channels on box are in reverse order */
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static unsigned long G_chnmap[MAX_CHANNELS] = {3, 2, 1, 0};
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static LIST_HEAD(s2255_devlist);

static int debug;
static int *s2255_debug = &debug;

static int s2255_start_readpipe(struct s2255_dev *dev);
static void s2255_stop_readpipe(struct s2255_dev *dev);
static int s2255_start_acquire(struct s2255_dev *dev, unsigned long chn);
static int s2255_stop_acquire(struct s2255_dev *dev, unsigned long chn);
static void s2255_fillbuff(struct s2255_dev *dev, struct s2255_buffer *buf,
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			   int chn, int jpgsize);
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static int s2255_set_mode(struct s2255_dev *dev, unsigned long chn,
			  struct s2255_mode *mode);
static int s2255_board_shutdown(struct s2255_dev *dev);
static void s2255_exit_v4l(struct s2255_dev *dev);
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static void s2255_fwload_start(struct s2255_dev *dev, int reset);
static void s2255_destroy(struct kref *kref);
static long s2255_vendor_req(struct s2255_dev *dev, unsigned char req,
			     u16 index, u16 value, void *buf,
			     s32 buf_len, int bOut);
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/* dev_err macro with driver name */
#define S2255_DRIVER_NAME "s2255"
#define s2255_dev_err(dev, fmt, arg...)					\
		dev_err(dev, S2255_DRIVER_NAME " - " fmt, ##arg)

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#define dprintk(level, fmt, arg...)					\
	do {								\
		if (*s2255_debug >= (level)) {				\
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			printk(KERN_DEBUG S2255_DRIVER_NAME		\
				": " fmt, ##arg);			\
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		}							\
	} while (0)

static struct usb_driver s2255_driver;


/* Declare static vars that will be used as parameters */
static unsigned int vid_limit = 16;	/* Video memory limit, in Mb */

/* start video number */
static int video_nr = -1;	/* /dev/videoN, -1 for autodetect */

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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Debug level(0-100) default 0");
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module_param(vid_limit, int, 0644);
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MODULE_PARM_DESC(vid_limit, "video memory limit(Mb)");
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module_param(video_nr, int, 0644);
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MODULE_PARM_DESC(video_nr, "start video minor(-1 default autodetect)");

/* USB device table */
static struct usb_device_id s2255_table[] = {
	{USB_DEVICE(USB_S2255_VENDOR_ID, USB_S2255_PRODUCT_ID)},
	{ }			/* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, s2255_table);


#define BUFFER_TIMEOUT msecs_to_jiffies(400)

/* supported controls */
static struct v4l2_queryctrl s2255_qctrl[] = {
	{
	.id = V4L2_CID_BRIGHTNESS,
	.type = V4L2_CTRL_TYPE_INTEGER,
	.name = "Brightness",
	.minimum = -127,
	.maximum = 128,
	.step = 1,
	.default_value = 0,
	.flags = 0,
	}, {
	.id = V4L2_CID_CONTRAST,
	.type = V4L2_CTRL_TYPE_INTEGER,
	.name = "Contrast",
	.minimum = 0,
	.maximum = 255,
	.step = 0x1,
	.default_value = DEF_CONTRAST,
	.flags = 0,
	}, {
	.id = V4L2_CID_SATURATION,
	.type = V4L2_CTRL_TYPE_INTEGER,
	.name = "Saturation",
	.minimum = 0,
	.maximum = 255,
	.step = 0x1,
	.default_value = DEF_SATURATION,
	.flags = 0,
	}, {
	.id = V4L2_CID_HUE,
	.type = V4L2_CTRL_TYPE_INTEGER,
	.name = "Hue",
	.minimum = 0,
	.maximum = 255,
	.step = 0x1,
	.default_value = DEF_HUE,
	.flags = 0,
	}
};

static int qctl_regs[ARRAY_SIZE(s2255_qctrl)];

/* image formats.  */
static const struct s2255_fmt formats[] = {
	{
		.name = "4:2:2, planar, YUV422P",
		.fourcc = V4L2_PIX_FMT_YUV422P,
		.depth = 16

	}, {
		.name = "4:2:2, packed, YUYV",
		.fourcc = V4L2_PIX_FMT_YUYV,
		.depth = 16

	}, {
		.name = "4:2:2, packed, UYVY",
		.fourcc = V4L2_PIX_FMT_UYVY,
		.depth = 16
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	}, {
		.name = "JPG",
		.fourcc = V4L2_PIX_FMT_JPEG,
		.depth = 24
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	}, {
		.name = "8bpp GREY",
		.fourcc = V4L2_PIX_FMT_GREY,
		.depth = 8
	}
};

static int norm_maxw(struct video_device *vdev)
{
	return (vdev->current_norm & V4L2_STD_NTSC) ?
	    LINE_SZ_4CIFS_NTSC : LINE_SZ_4CIFS_PAL;
}

static int norm_maxh(struct video_device *vdev)
{
	return (vdev->current_norm & V4L2_STD_NTSC) ?
	    (NUM_LINES_1CIFS_NTSC * 2) : (NUM_LINES_1CIFS_PAL * 2);
}

static int norm_minw(struct video_device *vdev)
{
	return (vdev->current_norm & V4L2_STD_NTSC) ?
	    LINE_SZ_1CIFS_NTSC : LINE_SZ_1CIFS_PAL;
}

static int norm_minh(struct video_device *vdev)
{
	return (vdev->current_norm & V4L2_STD_NTSC) ?
	    (NUM_LINES_1CIFS_NTSC) : (NUM_LINES_1CIFS_PAL);
}


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/*
 * TODO: fixme: move YUV reordering to hardware
 * converts 2255 planar format to yuyv or uyvy
 */
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static void planar422p_to_yuv_packed(const unsigned char *in,
				     unsigned char *out,
				     int width, int height,
				     int fmt)
{
	unsigned char *pY;
	unsigned char *pCb;
	unsigned char *pCr;
	unsigned long size = height * width;
	unsigned int i;
	pY = (unsigned char *)in;
	pCr = (unsigned char *)in + height * width;
	pCb = (unsigned char *)in + height * width + (height * width / 2);
	for (i = 0; i < size * 2; i += 4) {
		out[i] = (fmt == V4L2_PIX_FMT_YUYV) ? *pY++ : *pCr++;
		out[i + 1] = (fmt == V4L2_PIX_FMT_YUYV) ? *pCr++ : *pY++;
		out[i + 2] = (fmt == V4L2_PIX_FMT_YUYV) ? *pY++ : *pCb++;
		out[i + 3] = (fmt == V4L2_PIX_FMT_YUYV) ? *pCb++ : *pY++;
	}
	return;
}

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static void s2255_reset_dsppower(struct s2255_dev *dev)
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{
	s2255_vendor_req(dev, 0x40, 0x0b0b, 0x0b0b, NULL, 0, 1);
	msleep(10);
	s2255_vendor_req(dev, 0x50, 0x0000, 0x0000, NULL, 0, 1);
	return;
}
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/* kickstarts the firmware loading. from probe
 */
static void s2255_timer(unsigned long user_data)
{
	struct s2255_fw *data = (struct s2255_fw *)user_data;
	dprintk(100, "s2255 timer\n");
	if (usb_submit_urb(data->fw_urb, GFP_ATOMIC) < 0) {
		printk(KERN_ERR "s2255: can't submit urb\n");
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		atomic_set(&data->fw_state, S2255_FW_FAILED);
		/* wake up anything waiting for the firmware */
		wake_up(&data->wait_fw);
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		return;
	}
}


/* this loads the firmware asynchronously.
   Originally this was done synchroously in probe.
   But it is better to load it asynchronously here than block
   inside the probe function. Blocking inside probe affects boot time.
   FW loading is triggered by the timer in the probe function
*/
static void s2255_fwchunk_complete(struct urb *urb)
{
	struct s2255_fw *data = urb->context;
	struct usb_device *udev = urb->dev;
	int len;
	dprintk(100, "udev %p urb %p", udev, urb);
	if (urb->status) {
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		dev_err(&udev->dev, "URB failed with status %d\n", urb->status);
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		atomic_set(&data->fw_state, S2255_FW_FAILED);
		/* wake up anything waiting for the firmware */
		wake_up(&data->wait_fw);
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		return;
	}
	if (data->fw_urb == NULL) {
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		s2255_dev_err(&udev->dev, "disconnected\n");
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		atomic_set(&data->fw_state, S2255_FW_FAILED);
		/* wake up anything waiting for the firmware */
		wake_up(&data->wait_fw);
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		return;
	}
#define CHUNK_SIZE 512
	/* all USB transfers must be done with continuous kernel memory.
	   can't allocate more than 128k in current linux kernel, so
	   upload the firmware in chunks
	 */
	if (data->fw_loaded < data->fw_size) {
		len = (data->fw_loaded + CHUNK_SIZE) > data->fw_size ?
		    data->fw_size % CHUNK_SIZE : CHUNK_SIZE;

		if (len < CHUNK_SIZE)
			memset(data->pfw_data, 0, CHUNK_SIZE);

		dprintk(100, "completed len %d, loaded %d \n", len,
			data->fw_loaded);

		memcpy(data->pfw_data,
		       (char *) data->fw->data + data->fw_loaded, len);

		usb_fill_bulk_urb(data->fw_urb, udev, usb_sndbulkpipe(udev, 2),
				  data->pfw_data, CHUNK_SIZE,
				  s2255_fwchunk_complete, data);
		if (usb_submit_urb(data->fw_urb, GFP_ATOMIC) < 0) {
			dev_err(&udev->dev, "failed submit URB\n");
			atomic_set(&data->fw_state, S2255_FW_FAILED);
			/* wake up anything waiting for the firmware */
			wake_up(&data->wait_fw);
			return;
		}
		data->fw_loaded += len;
	} else {
		atomic_set(&data->fw_state, S2255_FW_LOADED_DSPWAIT);
	}
	dprintk(100, "2255 complete done\n");
	return;

}

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static int s2255_got_frame(struct s2255_dev *dev, int chn, int jpgsize)
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{
	struct s2255_dmaqueue *dma_q = &dev->vidq[chn];
	struct s2255_buffer *buf;
	unsigned long flags = 0;
	int rc = 0;
	dprintk(2, "wakeup: %p channel: %d\n", &dma_q, chn);
	spin_lock_irqsave(&dev->slock, flags);

	if (list_empty(&dma_q->active)) {
		dprintk(1, "No active queue to serve\n");
		rc = -1;
		goto unlock;
	}
	buf = list_entry(dma_q->active.next,
			 struct s2255_buffer, vb.queue);

	if (!waitqueue_active(&buf->vb.done)) {
		/* no one active */
		rc = -1;
		goto unlock;
	}
	list_del(&buf->vb.queue);
	do_gettimeofday(&buf->vb.ts);
	dprintk(100, "[%p/%d] wakeup\n", buf, buf->vb.i);
611
	s2255_fillbuff(dev, buf, dma_q->channel, jpgsize);
612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644
	wake_up(&buf->vb.done);
	dprintk(2, "wakeup [buf/i] [%p/%d]\n", buf, buf->vb.i);
unlock:
	spin_unlock_irqrestore(&dev->slock, flags);
	return 0;
}


static const struct s2255_fmt *format_by_fourcc(int fourcc)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(formats); i++) {
		if (-1 == formats[i].fourcc)
			continue;
		if (formats[i].fourcc == fourcc)
			return formats + i;
	}
	return NULL;
}




/* video buffer vmalloc implementation based partly on VIVI driver which is
 *          Copyright (c) 2006 by
 *                  Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
 *                  Ted Walther <ted--a.t--enumera.com>
 *                  John Sokol <sokol--a.t--videotechnology.com>
 *                  http://v4l.videotechnology.com/
 *
 */
static void s2255_fillbuff(struct s2255_dev *dev, struct s2255_buffer *buf,
645
			   int chn, int jpgsize)
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672
{
	int pos = 0;
	struct timeval ts;
	const char *tmpbuf;
	char *vbuf = videobuf_to_vmalloc(&buf->vb);
	unsigned long last_frame;
	struct s2255_framei *frm;

	if (!vbuf)
		return;

	last_frame = dev->last_frame[chn];
	if (last_frame != -1) {
		frm = &dev->buffer[chn].frame[last_frame];
		tmpbuf =
		    (const char *)dev->buffer[chn].frame[last_frame].lpvbits;
		switch (buf->fmt->fourcc) {
		case V4L2_PIX_FMT_YUYV:
		case V4L2_PIX_FMT_UYVY:
			planar422p_to_yuv_packed((const unsigned char *)tmpbuf,
						 vbuf, buf->vb.width,
						 buf->vb.height,
						 buf->fmt->fourcc);
			break;
		case V4L2_PIX_FMT_GREY:
			memcpy(vbuf, tmpbuf, buf->vb.width * buf->vb.height);
			break;
673 674 675 676
		case V4L2_PIX_FMT_JPEG:
			buf->vb.size = jpgsize;
			memcpy(vbuf, tmpbuf, buf->vb.size);
			break;
677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693
		case V4L2_PIX_FMT_YUV422P:
			memcpy(vbuf, tmpbuf,
			       buf->vb.width * buf->vb.height * 2);
			break;
		default:
			printk(KERN_DEBUG "s2255: unknown format?\n");
		}
		dev->last_frame[chn] = -1;
	} else {
		printk(KERN_ERR "s2255: =======no frame\n");
		return;

	}
	dprintk(2, "s2255fill at : Buffer 0x%08lx size= %d\n",
		(unsigned long)vbuf, pos);
	/* tell v4l buffer was filled */

694
	buf->vb.field_count = dev->frame_count[chn] * 2;
695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714
	do_gettimeofday(&ts);
	buf->vb.ts = ts;
	buf->vb.state = VIDEOBUF_DONE;
}


/* ------------------------------------------------------------------
   Videobuf operations
   ------------------------------------------------------------------*/

static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
			unsigned int *size)
{
	struct s2255_fh *fh = vq->priv_data;

	*size = fh->width * fh->height * (fh->fmt->depth >> 3);

	if (0 == *count)
		*count = S2255_DEF_BUFS;

715
	while (*size * (*count) > vid_limit * 1024 * 1024)
716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813
		(*count)--;

	return 0;
}

static void free_buffer(struct videobuf_queue *vq, struct s2255_buffer *buf)
{
	dprintk(4, "%s\n", __func__);

	videobuf_vmalloc_free(&buf->vb);
	buf->vb.state = VIDEOBUF_NEEDS_INIT;
}

static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
			  enum v4l2_field field)
{
	struct s2255_fh *fh = vq->priv_data;
	struct s2255_buffer *buf = container_of(vb, struct s2255_buffer, vb);
	int rc;
	dprintk(4, "%s, field=%d\n", __func__, field);
	if (fh->fmt == NULL)
		return -EINVAL;

	if ((fh->width < norm_minw(fh->dev->vdev[fh->channel])) ||
	    (fh->width > norm_maxw(fh->dev->vdev[fh->channel])) ||
	    (fh->height < norm_minh(fh->dev->vdev[fh->channel])) ||
	    (fh->height > norm_maxh(fh->dev->vdev[fh->channel]))) {
		dprintk(4, "invalid buffer prepare\n");
		return -EINVAL;
	}

	buf->vb.size = fh->width * fh->height * (fh->fmt->depth >> 3);

	if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) {
		dprintk(4, "invalid buffer prepare\n");
		return -EINVAL;
	}

	buf->fmt = fh->fmt;
	buf->vb.width = fh->width;
	buf->vb.height = fh->height;
	buf->vb.field = field;


	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
		rc = videobuf_iolock(vq, &buf->vb, NULL);
		if (rc < 0)
			goto fail;
	}

	buf->vb.state = VIDEOBUF_PREPARED;
	return 0;
fail:
	free_buffer(vq, buf);
	return rc;
}

static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
	struct s2255_buffer *buf = container_of(vb, struct s2255_buffer, vb);
	struct s2255_fh *fh = vq->priv_data;
	struct s2255_dev *dev = fh->dev;
	struct s2255_dmaqueue *vidq = &dev->vidq[fh->channel];

	dprintk(1, "%s\n", __func__);

	buf->vb.state = VIDEOBUF_QUEUED;
	list_add_tail(&buf->vb.queue, &vidq->active);
}

static void buffer_release(struct videobuf_queue *vq,
			   struct videobuf_buffer *vb)
{
	struct s2255_buffer *buf = container_of(vb, struct s2255_buffer, vb);
	struct s2255_fh *fh = vq->priv_data;
	dprintk(4, "%s %d\n", __func__, fh->channel);
	free_buffer(vq, buf);
}

static struct videobuf_queue_ops s2255_video_qops = {
	.buf_setup = buffer_setup,
	.buf_prepare = buffer_prepare,
	.buf_queue = buffer_queue,
	.buf_release = buffer_release,
};


static int res_get(struct s2255_dev *dev, struct s2255_fh *fh)
{
	/* is it free? */
	mutex_lock(&dev->lock);
	if (dev->resources[fh->channel]) {
		/* no, someone else uses it */
		mutex_unlock(&dev->lock);
		return 0;
	}
	/* it's free, grab it */
	dev->resources[fh->channel] = 1;
814 815
	fh->resources[fh->channel] = 1;
	dprintk(1, "s2255: res: get\n");
816 817 818 819 820 821
	mutex_unlock(&dev->lock);
	return 1;
}

static int res_locked(struct s2255_dev *dev, struct s2255_fh *fh)
{
822
	return dev->resources[fh->channel];
823 824
}

825 826 827 828 829 830
static int res_check(struct s2255_fh *fh)
{
	return fh->resources[fh->channel];
}


831 832
static void res_free(struct s2255_dev *dev, struct s2255_fh *fh)
{
833
	mutex_lock(&dev->lock);
834
	dev->resources[fh->channel] = 0;
835 836
	fh->resources[fh->channel] = 0;
	mutex_unlock(&dev->lock);
837 838 839 840 841 842 843 844 845 846 847
	dprintk(1, "res: put\n");
}


static int vidioc_querycap(struct file *file, void *priv,
			   struct v4l2_capability *cap)
{
	struct s2255_fh *fh = file->private_data;
	struct s2255_dev *dev = fh->dev;
	strlcpy(cap->driver, "s2255", sizeof(cap->driver));
	strlcpy(cap->card, "s2255", sizeof(cap->card));
848
	usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880
	cap->version = S2255_VERSION;
	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
	return 0;
}

static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
			       struct v4l2_fmtdesc *f)
{
	int index = 0;
	if (f)
		index = f->index;

	if (index >= ARRAY_SIZE(formats))
		return -EINVAL;

	dprintk(4, "name %s\n", formats[index].name);
	strlcpy(f->description, formats[index].name, sizeof(f->description));
	f->pixelformat = formats[index].fourcc;
	return 0;
}

static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
			    struct v4l2_format *f)
{
	struct s2255_fh *fh = priv;

	f->fmt.pix.width = fh->width;
	f->fmt.pix.height = fh->height;
	f->fmt.pix.field = fh->vb_vidq.field;
	f->fmt.pix.pixelformat = fh->fmt->fourcc;
	f->fmt.pix.bytesperline = f->fmt.pix.width * (fh->fmt->depth >> 3);
	f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
881
	return 0;
882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001
}

static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
			      struct v4l2_format *f)
{
	const struct s2255_fmt *fmt;
	enum v4l2_field field;
	int  b_any_field = 0;
	struct s2255_fh *fh = priv;
	struct s2255_dev *dev = fh->dev;
	int is_ntsc;

	is_ntsc =
	    (dev->vdev[fh->channel]->current_norm & V4L2_STD_NTSC) ? 1 : 0;

	fmt = format_by_fourcc(f->fmt.pix.pixelformat);

	if (fmt == NULL)
		return -EINVAL;

	field = f->fmt.pix.field;
	if (field == V4L2_FIELD_ANY)
		b_any_field = 1;

	dprintk(4, "try format %d \n", is_ntsc);
	/* supports 3 sizes. see s2255drv.h */
	dprintk(50, "width test %d, height %d\n",
		f->fmt.pix.width, f->fmt.pix.height);
	if (is_ntsc) {
		/* NTSC */
		if (f->fmt.pix.height >= NUM_LINES_1CIFS_NTSC * 2) {
			f->fmt.pix.height = NUM_LINES_1CIFS_NTSC * 2;
			if (b_any_field) {
				field = V4L2_FIELD_SEQ_TB;
			} else if (!((field == V4L2_FIELD_INTERLACED) ||
				      (field == V4L2_FIELD_SEQ_TB) ||
				      (field == V4L2_FIELD_INTERLACED_TB))) {
				dprintk(1, "unsupported field setting\n");
				return -EINVAL;
			}
		} else {
			f->fmt.pix.height = NUM_LINES_1CIFS_NTSC;
			if (b_any_field) {
				field = V4L2_FIELD_TOP;
			} else if (!((field == V4L2_FIELD_TOP) ||
				      (field == V4L2_FIELD_BOTTOM))) {
				dprintk(1, "unsupported field setting\n");
				return -EINVAL;
			}

		}
		if (f->fmt.pix.width >= LINE_SZ_4CIFS_NTSC)
			f->fmt.pix.width = LINE_SZ_4CIFS_NTSC;
		else if (f->fmt.pix.width >= LINE_SZ_2CIFS_NTSC)
			f->fmt.pix.width = LINE_SZ_2CIFS_NTSC;
		else if (f->fmt.pix.width >= LINE_SZ_1CIFS_NTSC)
			f->fmt.pix.width = LINE_SZ_1CIFS_NTSC;
		else
			f->fmt.pix.width = LINE_SZ_1CIFS_NTSC;
	} else {
		/* PAL */
		if (f->fmt.pix.height >= NUM_LINES_1CIFS_PAL * 2) {
			f->fmt.pix.height = NUM_LINES_1CIFS_PAL * 2;
			if (b_any_field) {
				field = V4L2_FIELD_SEQ_TB;
			} else if (!((field == V4L2_FIELD_INTERLACED) ||
				      (field == V4L2_FIELD_SEQ_TB) ||
				      (field == V4L2_FIELD_INTERLACED_TB))) {
				dprintk(1, "unsupported field setting\n");
				return -EINVAL;
			}
		} else {
			f->fmt.pix.height = NUM_LINES_1CIFS_PAL;
			if (b_any_field) {
				field = V4L2_FIELD_TOP;
			} else if (!((field == V4L2_FIELD_TOP) ||
				     (field == V4L2_FIELD_BOTTOM))) {
				dprintk(1, "unsupported field setting\n");
				return -EINVAL;
			}
		}
		if (f->fmt.pix.width >= LINE_SZ_4CIFS_PAL) {
			dprintk(50, "pal 704\n");
			f->fmt.pix.width = LINE_SZ_4CIFS_PAL;
			field = V4L2_FIELD_SEQ_TB;
		} else if (f->fmt.pix.width >= LINE_SZ_2CIFS_PAL) {
			dprintk(50, "pal 352A\n");
			f->fmt.pix.width = LINE_SZ_2CIFS_PAL;
			field = V4L2_FIELD_TOP;
		} else if (f->fmt.pix.width >= LINE_SZ_1CIFS_PAL) {
			dprintk(50, "pal 352B\n");
			f->fmt.pix.width = LINE_SZ_1CIFS_PAL;
			field = V4L2_FIELD_TOP;
		} else {
			dprintk(50, "pal 352C\n");
			f->fmt.pix.width = LINE_SZ_1CIFS_PAL;
			field = V4L2_FIELD_TOP;
		}
	}

	dprintk(50, "width %d height %d field %d \n", f->fmt.pix.width,
		f->fmt.pix.height, f->fmt.pix.field);
	f->fmt.pix.field = field;
	f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
	f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
	return 0;
}

static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
			    struct v4l2_format *f)
{
	struct s2255_fh *fh = priv;
	const struct s2255_fmt *fmt;
	struct videobuf_queue *q = &fh->vb_vidq;
	int ret;
	int norm;

	ret = vidioc_try_fmt_vid_cap(file, fh, f);

	if (ret < 0)
1002
		return ret;
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043

	fmt = format_by_fourcc(f->fmt.pix.pixelformat);

	if (fmt == NULL)
		return -EINVAL;

	mutex_lock(&q->vb_lock);

	if (videobuf_queue_is_busy(&fh->vb_vidq)) {
		dprintk(1, "queue busy\n");
		ret = -EBUSY;
		goto out_s_fmt;
	}

	if (res_locked(fh->dev, fh)) {
		dprintk(1, "can't change format after started\n");
		ret = -EBUSY;
		goto out_s_fmt;
	}

	fh->fmt = fmt;
	fh->width = f->fmt.pix.width;
	fh->height = f->fmt.pix.height;
	fh->vb_vidq.field = f->fmt.pix.field;
	fh->type = f->type;
	norm = norm_minw(fh->dev->vdev[fh->channel]);
	if (fh->width > norm_minw(fh->dev->vdev[fh->channel])) {
		if (fh->height > norm_minh(fh->dev->vdev[fh->channel]))
			fh->mode.scale = SCALE_4CIFS;
		else
			fh->mode.scale = SCALE_2CIFS;

	} else {
		fh->mode.scale = SCALE_1CIFS;
	}

	/* color mode */
	switch (fh->fmt->fourcc) {
	case V4L2_PIX_FMT_GREY:
		fh->mode.color = COLOR_Y8;
		break;
1044
	case V4L2_PIX_FMT_JPEG:
1045 1046
		fh->mode.color = COLOR_JPG |
			(fh->dev->jc[fh->channel].quality << 8);
1047
		break;
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165
	case V4L2_PIX_FMT_YUV422P:
		fh->mode.color = COLOR_YUVPL;
		break;
	case V4L2_PIX_FMT_YUYV:
	case V4L2_PIX_FMT_UYVY:
	default:
		fh->mode.color = COLOR_YUVPK;
		break;
	}
	ret = 0;
out_s_fmt:
	mutex_unlock(&q->vb_lock);
	return ret;
}

static int vidioc_reqbufs(struct file *file, void *priv,
			  struct v4l2_requestbuffers *p)
{
	int rc;
	struct s2255_fh *fh = priv;
	rc = videobuf_reqbufs(&fh->vb_vidq, p);
	return rc;
}

static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
	int rc;
	struct s2255_fh *fh = priv;
	rc = videobuf_querybuf(&fh->vb_vidq, p);
	return rc;
}

static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
	int rc;
	struct s2255_fh *fh = priv;
	rc = videobuf_qbuf(&fh->vb_vidq, p);
	return rc;
}

static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
	int rc;
	struct s2255_fh *fh = priv;
	rc = videobuf_dqbuf(&fh->vb_vidq, p, file->f_flags & O_NONBLOCK);
	return rc;
}

#ifdef CONFIG_VIDEO_V4L1_COMPAT
static int vidioc_cgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
{
	struct s2255_fh *fh = priv;

	return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
}
#endif

/* write to the configuration pipe, synchronously */
static int s2255_write_config(struct usb_device *udev, unsigned char *pbuf,
			      int size)
{
	int pipe;
	int done;
	long retval = -1;
	if (udev) {
		pipe = usb_sndbulkpipe(udev, S2255_CONFIG_EP);
		retval = usb_bulk_msg(udev, pipe, pbuf, size, &done, 500);
	}
	return retval;
}

static u32 get_transfer_size(struct s2255_mode *mode)
{
	int linesPerFrame = LINE_SZ_DEF;
	int pixelsPerLine = NUM_LINES_DEF;
	u32 outImageSize;
	u32 usbInSize;
	unsigned int mask_mult;

	if (mode == NULL)
		return 0;

	if (mode->format == FORMAT_NTSC) {
		switch (mode->scale) {
		case SCALE_4CIFS:
			linesPerFrame = NUM_LINES_4CIFS_NTSC * 2;
			pixelsPerLine = LINE_SZ_4CIFS_NTSC;
			break;
		case SCALE_2CIFS:
			linesPerFrame = NUM_LINES_2CIFS_NTSC;
			pixelsPerLine = LINE_SZ_2CIFS_NTSC;
			break;
		case SCALE_1CIFS:
			linesPerFrame = NUM_LINES_1CIFS_NTSC;
			pixelsPerLine = LINE_SZ_1CIFS_NTSC;
			break;
		default:
			break;
		}
	} else if (mode->format == FORMAT_PAL) {
		switch (mode->scale) {
		case SCALE_4CIFS:
			linesPerFrame = NUM_LINES_4CIFS_PAL * 2;
			pixelsPerLine = LINE_SZ_4CIFS_PAL;
			break;
		case SCALE_2CIFS:
			linesPerFrame = NUM_LINES_2CIFS_PAL;
			pixelsPerLine = LINE_SZ_2CIFS_PAL;
			break;
		case SCALE_1CIFS:
			linesPerFrame = NUM_LINES_1CIFS_PAL;
			pixelsPerLine = LINE_SZ_1CIFS_PAL;
			break;
		default:
			break;
		}
	}
	outImageSize = linesPerFrame * pixelsPerLine;
1166
	if ((mode->color & MASK_COLOR) != COLOR_Y8) {
1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211
		/* 2 bytes/pixel if not monochrome */
		outImageSize *= 2;
	}

	/* total bytes to send including prefix and 4K padding;
	   must be a multiple of USB_READ_SIZE */
	usbInSize = outImageSize + PREFIX_SIZE;	/* always send prefix */
	mask_mult = 0xffffffffUL - DEF_USB_BLOCK + 1;
	/* if size not a multiple of USB_READ_SIZE */
	if (usbInSize & ~mask_mult)
		usbInSize = (usbInSize & mask_mult) + (DEF_USB_BLOCK);
	return usbInSize;
}

static void dump_verify_mode(struct s2255_dev *sdev, struct s2255_mode *mode)
{
	struct device *dev = &sdev->udev->dev;
	dev_info(dev, "------------------------------------------------\n");
	dev_info(dev, "verify mode\n");
	dev_info(dev, "format: %d\n", mode->format);
	dev_info(dev, "scale: %d\n", mode->scale);
	dev_info(dev, "fdec: %d\n", mode->fdec);
	dev_info(dev, "color: %d\n", mode->color);
	dev_info(dev, "bright: 0x%x\n", mode->bright);
	dev_info(dev, "restart: 0x%x\n", mode->restart);
	dev_info(dev, "usb_block: 0x%x\n", mode->usb_block);
	dev_info(dev, "single: 0x%x\n", mode->single);
	dev_info(dev, "------------------------------------------------\n");
}

/*
 * set mode is the function which controls the DSP.
 * the restart parameter in struct s2255_mode should be set whenever
 * the image size could change via color format, video system or image
 * size.
 * When the restart parameter is set, we sleep for ONE frame to allow the
 * DSP time to get the new frame
 */
static int s2255_set_mode(struct s2255_dev *dev, unsigned long chn,
			  struct s2255_mode *mode)
{
	int res;
	u32 *buffer;
	unsigned long chn_rev;

1212
	mutex_lock(&dev->lock);
1213 1214 1215 1216 1217 1218
	chn_rev = G_chnmap[chn];
	dprintk(3, "mode scale [%ld] %p %d\n", chn, mode, mode->scale);
	dprintk(3, "mode scale [%ld] %p %d\n", chn, &dev->mode[chn],
		dev->mode[chn].scale);
	dprintk(2, "mode contrast %x\n", mode->contrast);

1219 1220 1221 1222
	/* if JPEG, set the quality */
	if ((mode->color & MASK_COLOR) == COLOR_JPG)
		mode->color = (dev->jc[chn].quality << 8) | COLOR_JPG;

1223 1224 1225 1226 1227 1228 1229 1230
	/* save the mode */
	dev->mode[chn] = *mode;
	dev->req_image_size[chn] = get_transfer_size(mode);
	dprintk(1, "transfer size %ld\n", dev->req_image_size[chn]);

	buffer = kzalloc(512, GFP_KERNEL);
	if (buffer == NULL) {
		dev_err(&dev->udev->dev, "out of mem\n");
1231
		mutex_unlock(&dev->lock);
1232 1233 1234 1235 1236 1237 1238 1239
		return -ENOMEM;
	}

	/* set the mode */
	buffer[0] = IN_DATA_TOKEN;
	buffer[1] = (u32) chn_rev;
	buffer[2] = CMD_SET_MODE;
	memcpy(&buffer[3], &dev->mode[chn], sizeof(struct s2255_mode));
1240
	dev->setmode_ready[chn] = 0;
1241 1242 1243 1244 1245 1246 1247
	res = s2255_write_config(dev->udev, (unsigned char *)buffer, 512);
	if (debug)
		dump_verify_mode(dev, mode);
	kfree(buffer);
	dprintk(1, "set mode done chn %lu, %d\n", chn, res);

	/* wait at least 3 frames before continuing */
1248 1249 1250 1251 1252 1253 1254 1255 1256
	if (mode->restart) {
		wait_event_timeout(dev->wait_setmode[chn],
				   (dev->setmode_ready[chn] != 0),
				   msecs_to_jiffies(S2255_SETMODE_TIMEOUT));
		if (dev->setmode_ready[chn] != 1) {
			printk(KERN_DEBUG "s2255: no set mode response\n");
			res = -EFAULT;
		}
	}
1257 1258 1259

	/* clear the restart flag */
	dev->mode[chn].restart = 0;
1260
	mutex_unlock(&dev->lock);
1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283
	return res;
}

static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
{
	int res;
	struct s2255_fh *fh = priv;
	struct s2255_dev *dev = fh->dev;
	struct s2255_mode *new_mode;
	struct s2255_mode *old_mode;
	int chn;
	int j;
	dprintk(4, "%s\n", __func__);
	if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
		dev_err(&dev->udev->dev, "invalid fh type0\n");
		return -EINVAL;
	}
	if (i != fh->type) {
		dev_err(&dev->udev->dev, "invalid fh type1\n");
		return -EINVAL;
	}

	if (!res_get(dev, fh)) {
1284
		s2255_dev_err(&dev->udev->dev, "stream busy\n");
1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308
		return -EBUSY;
	}

	/* send a set mode command everytime with restart.
	   in case we switch resolutions or other parameters */
	chn = fh->channel;
	new_mode = &fh->mode;
	old_mode = &fh->dev->mode[chn];

	if (new_mode->color != old_mode->color)
		new_mode->restart = 1;
	else if (new_mode->scale != old_mode->scale)
		new_mode->restart = 1;
	else if (new_mode->format != old_mode->format)
		new_mode->restart = 1;

	s2255_set_mode(dev, chn, new_mode);
	new_mode->restart = 0;
	*old_mode = *new_mode;
	dev->cur_fmt[chn] = fh->fmt;
	dprintk(1, "%s[%d]\n", __func__, chn);
	dev->last_frame[chn] = -1;
	dev->bad_payload[chn] = 0;
	dev->cur_frame[chn] = 0;
1309
	dev->frame_count[chn] = 0;
1310
	for (j = 0; j < SYS_FRAMES; j++) {
1311
		dev->buffer[chn].frame[j].ulState = S2255_READ_IDLE;
1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338
		dev->buffer[chn].frame[j].cur_size = 0;
	}
	res = videobuf_streamon(&fh->vb_vidq);
	if (res == 0) {
		s2255_start_acquire(dev, chn);
		dev->b_acquire[chn] = 1;
	} else {
		res_free(dev, fh);
	}
	return res;
}

static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
{
	struct s2255_fh *fh = priv;
	struct s2255_dev *dev = fh->dev;

	dprintk(4, "%s\n, channel: %d", __func__, fh->channel);
	if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
		printk(KERN_ERR "invalid fh type0\n");
		return -EINVAL;
	}
	if (i != fh->type) {
		printk(KERN_ERR "invalid type i\n");
		return -EINVAL;
	}
	s2255_stop_acquire(dev, fh->channel);
1339
	videobuf_streamoff(&fh->vb_vidq);
1340
	res_free(dev, fh);
1341
	return 0;
1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394
}

static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *i)
{
	struct s2255_fh *fh = priv;
	struct s2255_mode *mode;
	struct videobuf_queue *q = &fh->vb_vidq;
	int ret = 0;

	mutex_lock(&q->vb_lock);
	if (videobuf_queue_is_busy(q)) {
		dprintk(1, "queue busy\n");
		ret = -EBUSY;
		goto out_s_std;
	}

	if (res_locked(fh->dev, fh)) {
		dprintk(1, "can't change standard after started\n");
		ret = -EBUSY;
		goto out_s_std;
	}
	mode = &fh->mode;

	if (*i & V4L2_STD_NTSC) {
		dprintk(4, "vidioc_s_std NTSC\n");
		mode->format = FORMAT_NTSC;
	} else if (*i & V4L2_STD_PAL) {
		dprintk(4, "vidioc_s_std PAL\n");
		mode->format = FORMAT_PAL;
	} else {
		ret = -EINVAL;
	}
out_s_std:
	mutex_unlock(&q->vb_lock);
	return ret;
}

/* Sensoray 2255 is a multiple channel capture device.
   It does not have a "crossbar" of inputs.
   We use one V4L device per channel. The user must
   be aware that certain combinations are not allowed.
   For instance, you cannot do full FPS on more than 2 channels(2 videodevs)
   at once in color(you can do full fps on 4 channels with greyscale.
*/
static int vidioc_enum_input(struct file *file, void *priv,
			     struct v4l2_input *inp)
{
	if (inp->index != 0)
		return -EINVAL;

	inp->type = V4L2_INPUT_TYPE_CAMERA;
	inp->std = S2255_NORMS;
	strlcpy(inp->name, "Camera", sizeof(inp->name));
1395
	return 0;
1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418
}

static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
	*i = 0;
	return 0;
}
static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
	if (i > 0)
		return -EINVAL;
	return 0;
}

/* --- controls ---------------------------------------------- */
static int vidioc_queryctrl(struct file *file, void *priv,
			    struct v4l2_queryctrl *qc)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(s2255_qctrl); i++)
		if (qc->id && qc->id == s2255_qctrl[i].id) {
			memcpy(qc, &(s2255_qctrl[i]), sizeof(*qc));
1419
			return 0;
1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433
		}

	dprintk(4, "query_ctrl -EINVAL %d\n", qc->id);
	return -EINVAL;
}

static int vidioc_g_ctrl(struct file *file, void *priv,
			 struct v4l2_control *ctrl)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(s2255_qctrl); i++)
		if (ctrl->id == s2255_qctrl[i].id) {
			ctrl->value = qctl_regs[i];
1434
			return 0;
1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453
		}
	dprintk(4, "g_ctrl -EINVAL\n");

	return -EINVAL;
}

static int vidioc_s_ctrl(struct file *file, void *priv,
			 struct v4l2_control *ctrl)
{
	int i;
	struct s2255_fh *fh = priv;
	struct s2255_dev *dev = fh->dev;
	struct s2255_mode *mode;
	mode = &fh->mode;
	dprintk(4, "vidioc_s_ctrl\n");
	for (i = 0; i < ARRAY_SIZE(s2255_qctrl); i++) {
		if (ctrl->id == s2255_qctrl[i].id) {
			if (ctrl->value < s2255_qctrl[i].minimum ||
			    ctrl->value > s2255_qctrl[i].maximum)
1454
				return -ERANGE;
1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483

			qctl_regs[i] = ctrl->value;
			/* update the mode to the corresponding value */
			switch (ctrl->id) {
			case V4L2_CID_BRIGHTNESS:
				mode->bright = ctrl->value;
				break;
			case V4L2_CID_CONTRAST:
				mode->contrast = ctrl->value;
				break;
			case V4L2_CID_HUE:
				mode->hue = ctrl->value;
				break;
			case V4L2_CID_SATURATION:
				mode->saturation = ctrl->value;
				break;
			}
			mode->restart = 0;
			/* set mode here.  Note: stream does not need restarted.
			   some V4L programs restart stream unnecessarily
			   after a s_crtl.
			 */
			s2255_set_mode(dev, fh->channel, mode);
			return 0;
		}
	}
	return -EINVAL;
}

1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504
static int vidioc_g_jpegcomp(struct file *file, void *priv,
			 struct v4l2_jpegcompression *jc)
{
	struct s2255_fh *fh = priv;
	struct s2255_dev *dev = fh->dev;
	*jc = dev->jc[fh->channel];
	dprintk(2, "getting jpegcompression, quality %d\n", jc->quality);
	return 0;
}

static int vidioc_s_jpegcomp(struct file *file, void *priv,
			 struct v4l2_jpegcompression *jc)
{
	struct s2255_fh *fh = priv;
	struct s2255_dev *dev = fh->dev;
	if (jc->quality < 0 || jc->quality > 100)
		return -EINVAL;
	dev->jc[fh->channel].quality = jc->quality;
	dprintk(2, "setting jpeg quality %d\n", jc->quality);
	return 0;
}
1505
static int s2255_open(struct file *file)
1506
{
1507
	int minor = video_devdata(file)->minor;
1508 1509 1510 1511 1512 1513
	struct s2255_dev *h, *dev = NULL;
	struct s2255_fh *fh;
	struct list_head *list;
	enum v4l2_buf_type type = 0;
	int i = 0;
	int cur_channel = -1;
1514
	int state;
1515 1516
	dprintk(1, "s2255: open called (minor=%d)\n", minor);

1517
	lock_kernel();
1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529
	list_for_each(list, &s2255_devlist) {
		h = list_entry(list, struct s2255_dev, s2255_devlist);
		for (i = 0; i < MAX_CHANNELS; i++) {
			if (h->vdev[i]->minor == minor) {
				cur_channel = i;
				dev = h;
				type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
			}
		}
	}

	if ((NULL == dev) || (cur_channel == -1)) {
1530
		unlock_kernel();
1531
		printk(KERN_INFO "s2255: openv4l no dev\n");
1532 1533 1534
		return -ENODEV;
	}

1535 1536 1537 1538 1539 1540
	if (atomic_read(&dev->fw_data->fw_state) == S2255_FW_DISCONNECTING) {
		unlock_kernel();
		printk(KERN_INFO "disconnecting\n");
		return -ENODEV;
	}
	kref_get(&dev->kref);
1541 1542 1543
	mutex_lock(&dev->open_lock);

	dev->users[cur_channel]++;
1544
	dprintk(4, "s2255: open_handles %d\n", dev->users[cur_channel]);
1545

1546 1547
	switch (atomic_read(&dev->fw_data->fw_state)) {
	case S2255_FW_FAILED:
1548 1549
		s2255_dev_err(&dev->udev->dev,
			"firmware load failed. retrying.\n");
1550
		s2255_fwload_start(dev, 1);
1551
		wait_event_timeout(dev->fw_data->wait_fw,
1552 1553 1554 1555
				   ((atomic_read(&dev->fw_data->fw_state)
				     == S2255_FW_SUCCESS) ||
				    (atomic_read(&dev->fw_data->fw_state)
				     == S2255_FW_DISCONNECTING)),
1556
				   msecs_to_jiffies(S2255_LOAD_TIMEOUT));
1557 1558 1559
		break;
	case S2255_FW_NOTLOADED:
	case S2255_FW_LOADED_DSPWAIT:
1560 1561 1562 1563
		/* give S2255_LOAD_TIMEOUT time for firmware to load in case
		   driver loaded and then device immediately opened */
		printk(KERN_INFO "%s waiting for firmware load\n", __func__);
		wait_event_timeout(dev->fw_data->wait_fw,
1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596
				   ((atomic_read(&dev->fw_data->fw_state)
				     == S2255_FW_SUCCESS) ||
				    (atomic_read(&dev->fw_data->fw_state)
				     == S2255_FW_DISCONNECTING)),
			msecs_to_jiffies(S2255_LOAD_TIMEOUT));
		break;
	case S2255_FW_SUCCESS:
	default:
		break;
	}
	state = atomic_read(&dev->fw_data->fw_state);
	if (state != S2255_FW_SUCCESS) {
		int rc;
		switch (state) {
		case S2255_FW_FAILED:
			printk(KERN_INFO "2255 FW load failed. %d\n", state);
			rc = -ENODEV;
			break;
		case S2255_FW_DISCONNECTING:
			printk(KERN_INFO "%s: disconnecting\n", __func__);
			rc = -ENODEV;
			break;
		case S2255_FW_LOADED_DSPWAIT:
		case S2255_FW_NOTLOADED:
			printk(KERN_INFO "%s: firmware not loaded yet"
			       "please try again later\n",
			       __func__);
			rc = -EAGAIN;
			break;
		default:
			printk(KERN_INFO "%s: unknown state\n", __func__);
			rc = -EFAULT;
			break;
1597
		}
1598 1599 1600 1601 1602
		dev->users[cur_channel]--;
		mutex_unlock(&dev->open_lock);
		kref_put(&dev->kref, s2255_destroy);
		unlock_kernel();
		return rc;
1603 1604 1605 1606 1607
	}

	/* allocate + initialize per filehandle data */
	fh = kzalloc(sizeof(*fh), GFP_KERNEL);
	if (NULL == fh) {
1608
		dev->users[cur_channel]--;
1609
		mutex_unlock(&dev->open_lock);
1610
		kref_put(&dev->kref, s2255_destroy);
1611
		unlock_kernel();
1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624
		return -ENOMEM;
	}

	file->private_data = fh;
	fh->dev = dev;
	fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	fh->mode = dev->mode[cur_channel];
	fh->fmt = dev->cur_fmt[cur_channel];
	/* default 4CIF NTSC */
	fh->width = LINE_SZ_4CIFS_NTSC;
	fh->height = NUM_LINES_4CIFS_NTSC * 2;
	fh->channel = cur_channel;

1625 1626 1627 1628 1629 1630 1631
	/* configure channel to default state */
	if (!dev->chn_configured[cur_channel]) {
		s2255_set_mode(dev, cur_channel, &fh->mode);
		dev->chn_configured[cur_channel] = 1;
	}


1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650
	/* Put all controls at a sane state */
	for (i = 0; i < ARRAY_SIZE(s2255_qctrl); i++)
		qctl_regs[i] = s2255_qctrl[i].default_value;

	dprintk(1, "s2255drv: open minor=%d type=%s users=%d\n",
		minor, v4l2_type_names[type], dev->users[cur_channel]);
	dprintk(2, "s2255drv: open: fh=0x%08lx, dev=0x%08lx, vidq=0x%08lx\n",
		(unsigned long)fh, (unsigned long)dev,
		(unsigned long)&dev->vidq[cur_channel]);
	dprintk(4, "s2255drv: open: list_empty active=%d\n",
		list_empty(&dev->vidq[cur_channel].active));

	videobuf_queue_vmalloc_init(&fh->vb_vidq, &s2255_video_qops,
				    NULL, &dev->slock,
				    fh->type,
				    V4L2_FIELD_INTERLACED,
				    sizeof(struct s2255_buffer), fh);

	mutex_unlock(&dev->open_lock);
1651
	unlock_kernel();
1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672
	return 0;
}


static unsigned int s2255_poll(struct file *file,
			       struct poll_table_struct *wait)
{
	struct s2255_fh *fh = file->private_data;
	int rc;
	dprintk(100, "%s\n", __func__);

	if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
		return POLLERR;

	rc = videobuf_poll_stream(file, &fh->vb_vidq, wait);
	return rc;
}

static void s2255_destroy(struct kref *kref)
{
	struct s2255_dev *dev = to_s2255_dev(kref);
1673 1674
	struct list_head *list;
	int i;
1675 1676 1677 1678
	if (!dev) {
		printk(KERN_ERR "s2255drv: kref problem\n");
		return;
	}
1679 1680
	atomic_set(&dev->fw_data->fw_state, S2255_FW_DISCONNECTING);
	wake_up(&dev->fw_data->wait_fw);
1681 1682 1683 1684
	for (i = 0; i < MAX_CHANNELS; i++) {
		dev->setmode_ready[i] = 1;
		wake_up(&dev->wait_setmode[i]);
	}
1685
	mutex_lock(&dev->open_lock);
1686 1687
	/* reset the DSP so firmware can be reload next time */
	s2255_reset_dsppower(dev);
1688 1689 1690 1691
	s2255_exit_v4l(dev);
	/* board shutdown stops the read pipe if it is running */
	s2255_board_shutdown(dev);
	/* make sure firmware still not trying to load */
1692 1693
	del_timer(&dev->timer);  /* only started in .probe and .open */

1694 1695 1696 1697 1698 1699
	if (dev->fw_data->fw_urb) {
		dprintk(2, "kill fw_urb\n");
		usb_kill_urb(dev->fw_data->fw_urb);
		usb_free_urb(dev->fw_data->fw_urb);
		dev->fw_data->fw_urb = NULL;
	}
1700 1701 1702 1703
	if (dev->fw_data->fw)
		release_firmware(dev->fw_data->fw);
	kfree(dev->fw_data->pfw_data);
	kfree(dev->fw_data);
1704 1705
	usb_put_dev(dev->udev);
	dprintk(1, "%s", __func__);
1706 1707 1708 1709 1710 1711

	while (!list_empty(&s2255_devlist)) {
		list = s2255_devlist.next;
		list_del(list);
	}
	mutex_unlock(&dev->open_lock);
1712
	kfree(dev);
1713 1714
}

1715
static int s2255_close(struct file *file)
1716 1717 1718
{
	struct s2255_fh *fh = file->private_data;
	struct s2255_dev *dev = fh->dev;
1719
	int minor = video_devdata(file)->minor;
1720 1721 1722 1723 1724
	if (!dev)
		return -ENODEV;

	mutex_lock(&dev->open_lock);

1725 1726 1727 1728 1729 1730 1731 1732
	/* turn off stream */
	if (res_check(fh)) {
		if (dev->b_acquire[fh->channel])
			s2255_stop_acquire(dev, fh->channel);
		videobuf_streamoff(&fh->vb_vidq);
		res_free(dev, fh);
	}

1733 1734
	videobuf_mmap_free(&fh->vb_vidq);
	dev->users[fh->channel]--;
1735

1736 1737 1738 1739 1740
	mutex_unlock(&dev->open_lock);

	kref_put(&dev->kref, s2255_destroy);
	dprintk(1, "s2255: close called (minor=%d, users=%d)\n",
		minor, dev->users[fh->channel]);
1741
	kfree(fh);
1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762
	return 0;
}

static int s2255_mmap_v4l(struct file *file, struct vm_area_struct *vma)
{
	struct s2255_fh *fh = file->private_data;
	int ret;

	if (!fh)
		return -ENODEV;
	dprintk(4, "mmap called, vma=0x%08lx\n", (unsigned long)vma);

	ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);

	dprintk(4, "vma start=0x%08lx, size=%ld, ret=%d\n",
		(unsigned long)vma->vm_start,
		(unsigned long)vma->vm_end - (unsigned long)vma->vm_start, ret);

	return ret;
}

1763
static const struct v4l2_file_operations s2255_fops_v4l = {
1764 1765 1766 1767 1768 1769 1770 1771
	.owner = THIS_MODULE,
	.open = s2255_open,
	.release = s2255_close,
	.poll = s2255_poll,
	.ioctl = video_ioctl2,	/* V4L2 ioctl handler */
	.mmap = s2255_mmap_v4l,
};

1772
static const struct v4l2_ioctl_ops s2255_ioctl_ops = {
1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793
	.vidioc_querycap = vidioc_querycap,
	.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
	.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
	.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
	.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
	.vidioc_reqbufs = vidioc_reqbufs,
	.vidioc_querybuf = vidioc_querybuf,
	.vidioc_qbuf = vidioc_qbuf,
	.vidioc_dqbuf = vidioc_dqbuf,
	.vidioc_s_std = vidioc_s_std,
	.vidioc_enum_input = vidioc_enum_input,
	.vidioc_g_input = vidioc_g_input,
	.vidioc_s_input = vidioc_s_input,
	.vidioc_queryctrl = vidioc_queryctrl,
	.vidioc_g_ctrl = vidioc_g_ctrl,
	.vidioc_s_ctrl = vidioc_s_ctrl,
	.vidioc_streamon = vidioc_streamon,
	.vidioc_streamoff = vidioc_streamoff,
#ifdef CONFIG_VIDEO_V4L1_COMPAT
	.vidiocgmbuf = vidioc_cgmbuf,
#endif
1794 1795
	.vidioc_s_jpegcomp = vidioc_s_jpegcomp,
	.vidioc_g_jpegcomp = vidioc_g_jpegcomp,
1796 1797 1798 1799 1800 1801 1802 1803
};

static struct video_device template = {
	.name = "s2255v",
	.fops = &s2255_fops_v4l,
	.ioctl_ops = &s2255_ioctl_ops,
	.minor = -1,
	.release = video_device_release,
1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824
	.tvnorms = S2255_NORMS,
	.current_norm = V4L2_STD_NTSC_M,
};

static int s2255_probe_v4l(struct s2255_dev *dev)
{
	int ret;
	int i;
	int cur_nr = video_nr;

	/* initialize all video 4 linux */
	list_add_tail(&dev->s2255_devlist, &s2255_devlist);
	/* register 4 video devices */
	for (i = 0; i < MAX_CHANNELS; i++) {
		INIT_LIST_HEAD(&dev->vidq[i].active);
		dev->vidq[i].dev = dev;
		dev->vidq[i].channel = i;
		dev->vidq[i].kthread = NULL;
		/* register 4 video devices */
		dev->vdev[i] = video_device_alloc();
		memcpy(dev->vdev[i], &template, sizeof(struct video_device));
1825
		dev->vdev[i]->parent = &dev->interface->dev;
1826 1827 1828 1829 1830 1831 1832 1833
		if (video_nr == -1)
			ret = video_register_device(dev->vdev[i],
						    VFL_TYPE_GRABBER,
						    video_nr);
		else
			ret = video_register_device(dev->vdev[i],
						    VFL_TYPE_GRABBER,
						    cur_nr + i);
1834
		video_set_drvdata(dev->vdev[i], dev);
1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847

		if (ret != 0) {
			dev_err(&dev->udev->dev,
				"failed to register video device!\n");
			return ret;
		}
	}
	printk(KERN_INFO "Sensoray 2255 V4L driver\n");
	return ret;
}

static void s2255_exit_v4l(struct s2255_dev *dev)
{
1848

1849 1850
	int i;
	for (i = 0; i < MAX_CHANNELS; i++) {
1851
		if (-1 != dev->vdev[i]->minor) {
1852
			video_unregister_device(dev->vdev[i]);
1853 1854
			printk(KERN_INFO "s2255 unregistered\n");
		} else {
1855
			video_device_release(dev->vdev[i]);
1856 1857
			printk(KERN_INFO "s2255 released\n");
		}
1858 1859 1860 1861 1862 1863 1864 1865 1866
	}
}

/* this function moves the usb stream read pipe data
 * into the system buffers.
 * returns 0 on success, EAGAIN if more data to process( call this
 * function again).
 *
 * Received frame structure:
1867
 * bytes 0-3:  marker : 0x2255DA4AL (S2255_MARKER_FRAME)
1868 1869 1870 1871 1872 1873 1874 1875
 * bytes 4-7:  channel: 0-3
 * bytes 8-11: payload size:  size of the frame
 * bytes 12-payloadsize+12:  frame data
 */
static int save_frame(struct s2255_dev *dev, struct s2255_pipeinfo *pipe_info)
{
	char *pdest;
	u32 offset = 0;
1876
	int bframe = 0;
1877 1878 1879 1880 1881 1882
	char *psrc;
	unsigned long copy_size;
	unsigned long size;
	s32 idx = -1;
	struct s2255_framei *frm;
	unsigned char *pdata;
1883

1884 1885 1886
	dprintk(100, "buffer to user\n");

	idx = dev->cur_frame[dev->cc];
1887
	frm = &dev->buffer[dev->cc].frame[idx];
1888

1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937
	if (frm->ulState == S2255_READ_IDLE) {
		int jj;
		unsigned int cc;
		s32 *pdword;
		int payload;
		/* search for marker codes */
		pdata = (unsigned char *)pipe_info->transfer_buffer;
		for (jj = 0; jj < (pipe_info->cur_transfer_size - 12); jj++) {
			switch (*(s32 *) pdata) {
			case S2255_MARKER_FRAME:
				pdword = (s32 *)pdata;
				dprintk(4, "found frame marker at offset:"
					" %d [%x %x]\n", jj, pdata[0],
					pdata[1]);
				offset = jj + PREFIX_SIZE;
				bframe = 1;
				cc = pdword[1];
				if (cc >= MAX_CHANNELS) {
					printk(KERN_ERR
					       "bad channel\n");
					return -EINVAL;
				}
				/* reverse it */
				dev->cc = G_chnmap[cc];
				payload =  pdword[3];
				if (payload > dev->req_image_size[dev->cc]) {
					dev->bad_payload[dev->cc]++;
					/* discard the bad frame */
					return -EINVAL;
				}
				dev->pkt_size[dev->cc] = payload;
				dev->jpg_size[dev->cc] = pdword[4];
				break;
			case S2255_MARKER_RESPONSE:
				pdword = (s32 *)pdata;
				pdata += DEF_USB_BLOCK;
				jj += DEF_USB_BLOCK;
				if (pdword[1] >= MAX_CHANNELS)
					break;
				cc = G_chnmap[pdword[1]];
				if (!(cc >= 0 && cc < MAX_CHANNELS))
					break;
				switch (pdword[2]) {
				case 0x01:
					/* check if channel valid */
					/* set mode ready */
					dev->setmode_ready[cc] = 1;
					wake_up(&dev->wait_setmode[cc]);
					dprintk(5, "setmode ready %d\n", cc);
1938
					break;
1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951
				case 0x10:

					dev->chn_ready |= (1 << cc);
					if ((dev->chn_ready & 0x0f) != 0x0f)
						break;
					/* all channels ready */
					printk(KERN_INFO "s2255: fw loaded\n");
					atomic_set(&dev->fw_data->fw_state,
						   S2255_FW_SUCCESS);
					wake_up(&dev->fw_data->wait_fw);
					break;
				default:
					printk(KERN_INFO "s2255 unknwn resp\n");
1952
				}
1953
			default:
1954
				pdata++;
1955
				break;
1956
			}
1957 1958 1959 1960 1961
			if (bframe)
				break;
		} /* for */
		if (!bframe)
			return -EINVAL;
1962 1963
	}

1964

1965 1966 1967
	idx = dev->cur_frame[dev->cc];
	frm = &dev->buffer[dev->cc].frame[idx];

1968 1969 1970 1971 1972
	/* search done.  now find out if should be acquiring on this channel */
	if (!dev->b_acquire[dev->cc]) {
		/* we found a frame, but this channel is turned off */
		frm->ulState = S2255_READ_IDLE;
		return -EINVAL;
1973 1974
	}

1975 1976 1977
	if (frm->ulState == S2255_READ_IDLE) {
		frm->ulState = S2255_READ_FRAME;
		frm->cur_size = 0;
1978 1979
	}

1980 1981 1982 1983
	/* skip the marker 512 bytes (and offset if out of sync) */
	psrc = (u8 *)pipe_info->transfer_buffer + offset;


1984 1985 1986 1987 1988 1989 1990 1991
	if (frm->lpvbits == NULL) {
		dprintk(1, "s2255 frame buffer == NULL.%p %p %d %d",
			frm, dev, dev->cc, idx);
		return -ENOMEM;
	}

	pdest = frm->lpvbits + frm->cur_size;

1992
	copy_size = (pipe_info->cur_transfer_size - offset);
1993

1994
	size = dev->pkt_size[dev->cc] - PREFIX_SIZE;
1995

1996 1997 1998
	/* sanity check on pdest */
	if ((copy_size + frm->cur_size) < dev->req_image_size[dev->cc])
		memcpy(pdest, psrc, copy_size);
1999 2000

	frm->cur_size += copy_size;
2001 2002 2003
	dprintk(4, "cur_size size %lu size %lu \n", frm->cur_size, size);

	if (frm->cur_size >= size) {
2004 2005 2006 2007 2008 2009 2010 2011 2012 2013

		u32 cc = dev->cc;
		dprintk(2, "****************[%d]Buffer[%d]full*************\n",
			cc, idx);
		dev->last_frame[cc] = dev->cur_frame[cc];
		dev->cur_frame[cc]++;
		/* end of system frame ring buffer, start at zero */
		if ((dev->cur_frame[cc] == SYS_FRAMES) ||
		    (dev->cur_frame[cc] == dev->buffer[cc].dwFrames))
			dev->cur_frame[cc] = 0;
2014
		/* frame ready */
2015
		if (dev->b_acquire[cc])
2016
			s2255_got_frame(dev, cc, dev->jpg_size[cc]);
2017
		dev->frame_count[cc]++;
2018 2019 2020
		frm->ulState = S2255_READ_IDLE;
		frm->cur_size = 0;

2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038
	}
	/* done successfully */
	return 0;
}

static void s2255_read_video_callback(struct s2255_dev *dev,
				      struct s2255_pipeinfo *pipe_info)
{
	int res;
	dprintk(50, "callback read video \n");

	if (dev->cc >= MAX_CHANNELS) {
		dev->cc = 0;
		dev_err(&dev->udev->dev, "invalid channel\n");
		return;
	}
	/* otherwise copy to the system buffers */
	res = save_frame(dev, pipe_info);
2039 2040
	if (res != 0)
		dprintk(4, "s2255: read callback failed\n");
2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159

	dprintk(50, "callback read video done\n");
	return;
}

static long s2255_vendor_req(struct s2255_dev *dev, unsigned char Request,
			     u16 Index, u16 Value, void *TransferBuffer,
			     s32 TransferBufferLength, int bOut)
{
	int r;
	if (!bOut) {
		r = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
				    Request,
				    USB_TYPE_VENDOR | USB_RECIP_DEVICE |
				    USB_DIR_IN,
				    Value, Index, TransferBuffer,
				    TransferBufferLength, HZ * 5);
	} else {
		r = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
				    Request, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
				    Value, Index, TransferBuffer,
				    TransferBufferLength, HZ * 5);
	}
	return r;
}

/*
 * retrieve FX2 firmware version. future use.
 * @param dev pointer to device extension
 * @return -1 for fail, else returns firmware version as an int(16 bits)
 */
static int s2255_get_fx2fw(struct s2255_dev *dev)
{
	int fw;
	int ret;
	unsigned char transBuffer[64];
	ret = s2255_vendor_req(dev, S2255_VR_FW, 0, 0, transBuffer, 2,
			       S2255_VR_IN);
	if (ret < 0)
		dprintk(2, "get fw error: %x\n", ret);
	fw = transBuffer[0] + (transBuffer[1] << 8);
	dprintk(2, "Get FW %x %x\n", transBuffer[0], transBuffer[1]);
	return fw;
}

/*
 * Create the system ring buffer to copy frames into from the
 * usb read pipe.
 */
static int s2255_create_sys_buffers(struct s2255_dev *dev, unsigned long chn)
{
	unsigned long i;
	unsigned long reqsize;
	dprintk(1, "create sys buffers\n");
	if (chn >= MAX_CHANNELS)
		return -1;

	dev->buffer[chn].dwFrames = SYS_FRAMES;

	/* always allocate maximum size(PAL) for system buffers */
	reqsize = SYS_FRAMES_MAXSIZE;

	if (reqsize > SYS_FRAMES_MAXSIZE)
		reqsize = SYS_FRAMES_MAXSIZE;

	for (i = 0; i < SYS_FRAMES; i++) {
		/* allocate the frames */
		dev->buffer[chn].frame[i].lpvbits = vmalloc(reqsize);

		dprintk(1, "valloc %p chan %lu, idx %lu, pdata %p\n",
			&dev->buffer[chn].frame[i], chn, i,
			dev->buffer[chn].frame[i].lpvbits);
		dev->buffer[chn].frame[i].size = reqsize;
		if (dev->buffer[chn].frame[i].lpvbits == NULL) {
			printk(KERN_INFO "out of memory.  using less frames\n");
			dev->buffer[chn].dwFrames = i;
			break;
		}
	}

	/* make sure internal states are set */
	for (i = 0; i < SYS_FRAMES; i++) {
		dev->buffer[chn].frame[i].ulState = 0;
		dev->buffer[chn].frame[i].cur_size = 0;
	}

	dev->cur_frame[chn] = 0;
	dev->last_frame[chn] = -1;
	return 0;
}

static int s2255_release_sys_buffers(struct s2255_dev *dev,
				     unsigned long channel)
{
	unsigned long i;
	dprintk(1, "release sys buffers\n");
	for (i = 0; i < SYS_FRAMES; i++) {
		if (dev->buffer[channel].frame[i].lpvbits) {
			dprintk(1, "vfree %p\n",
				dev->buffer[channel].frame[i].lpvbits);
			vfree(dev->buffer[channel].frame[i].lpvbits);
		}
		dev->buffer[channel].frame[i].lpvbits = NULL;
	}
	return 0;
}

static int s2255_board_init(struct s2255_dev *dev)
{
	int j;
	struct s2255_mode mode_def = DEF_MODEI_NTSC_CONT;
	int fw_ver;
	dprintk(4, "board init: %p", dev);

	for (j = 0; j < MAX_PIPE_BUFFERS; j++) {
		struct s2255_pipeinfo *pipe = &dev->pipes[j];

		memset(pipe, 0, sizeof(*pipe));
		pipe->dev = dev;
2160 2161
		pipe->cur_transfer_size = S2255_USB_XFER_SIZE;
		pipe->max_transfer_size = S2255_USB_XFER_SIZE;
2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176

		pipe->transfer_buffer = kzalloc(pipe->max_transfer_size,
						GFP_KERNEL);
		if (pipe->transfer_buffer == NULL) {
			dprintk(1, "out of memory!\n");
			return -ENOMEM;
		}

	}

	/* query the firmware */
	fw_ver = s2255_get_fx2fw(dev);

	printk(KERN_INFO "2255 usb firmware version %d \n", fw_ver);
	if (fw_ver < CUR_USB_FWVER)
2177 2178
		dev_err(&dev->udev->dev,
			"usb firmware not up to date %d\n", fw_ver);
2179 2180 2181 2182

	for (j = 0; j < MAX_CHANNELS; j++) {
		dev->b_acquire[j] = 0;
		dev->mode[j] = mode_def;
2183
		dev->jc[j].quality = S2255_DEF_JPEG_QUAL;
2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232
		dev->cur_fmt[j] = &formats[0];
		dev->mode[j].restart = 1;
		dev->req_image_size[j] = get_transfer_size(&mode_def);
		dev->frame_count[j] = 0;
		/* create the system buffers */
		s2255_create_sys_buffers(dev, j);
	}
	/* start read pipe */
	s2255_start_readpipe(dev);

	dprintk(1, "S2255: board initialized\n");
	return 0;
}

static int s2255_board_shutdown(struct s2255_dev *dev)
{
	u32 i;

	dprintk(1, "S2255: board shutdown: %p", dev);

	for (i = 0; i < MAX_CHANNELS; i++) {
		if (dev->b_acquire[i])
			s2255_stop_acquire(dev, i);
	}

	s2255_stop_readpipe(dev);

	for (i = 0; i < MAX_CHANNELS; i++)
		s2255_release_sys_buffers(dev, i);

	/* release transfer buffers */
	for (i = 0; i < MAX_PIPE_BUFFERS; i++) {
		struct s2255_pipeinfo *pipe = &dev->pipes[i];
		kfree(pipe->transfer_buffer);
	}
	return 0;
}

static void read_pipe_completion(struct urb *purb)
{
	struct s2255_pipeinfo *pipe_info;
	struct s2255_dev *dev;
	int status;
	int pipe;

	pipe_info = purb->context;
	dprintk(100, "read pipe completion %p, status %d\n", purb,
		purb->status);
	if (pipe_info == NULL) {
2233
		dev_err(&purb->dev->dev, "no context!\n");
2234 2235 2236 2237 2238
		return;
	}

	dev = pipe_info->dev;
	if (dev == NULL) {
2239
		dev_err(&purb->dev->dev, "no context!\n");
2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290
		return;
	}
	status = purb->status;
	if (status != 0) {
		dprintk(2, "read_pipe_completion: err\n");
		return;
	}

	if (pipe_info->state == 0) {
		dprintk(2, "exiting USB pipe");
		return;
	}

	s2255_read_video_callback(dev, pipe_info);

	pipe_info->err_count = 0;
	pipe = usb_rcvbulkpipe(dev->udev, dev->read_endpoint);
	/* reuse urb */
	usb_fill_bulk_urb(pipe_info->stream_urb, dev->udev,
			  pipe,
			  pipe_info->transfer_buffer,
			  pipe_info->cur_transfer_size,
			  read_pipe_completion, pipe_info);

	if (pipe_info->state != 0) {
		if (usb_submit_urb(pipe_info->stream_urb, GFP_KERNEL)) {
			dev_err(&dev->udev->dev, "error submitting urb\n");
			usb_free_urb(pipe_info->stream_urb);
		}
	} else {
		dprintk(2, "read pipe complete state 0\n");
	}
	return;
}

static int s2255_start_readpipe(struct s2255_dev *dev)
{
	int pipe;
	int retval;
	int i;
	struct s2255_pipeinfo *pipe_info = dev->pipes;
	pipe = usb_rcvbulkpipe(dev->udev, dev->read_endpoint);
	dprintk(2, "start pipe IN %d\n", dev->read_endpoint);

	for (i = 0; i < MAX_PIPE_BUFFERS; i++) {
		pipe_info->state = 1;
		pipe_info->buf_index = (u32) i;
		pipe_info->priority_set = 0;
		pipe_info->stream_urb = usb_alloc_urb(0, GFP_KERNEL);
		if (!pipe_info->stream_urb) {
			dev_err(&dev->udev->dev,
2291
				"ReadStream: Unable to alloc URB\n");
2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387
			return -ENOMEM;
		}
		/* transfer buffer allocated in board_init */
		usb_fill_bulk_urb(pipe_info->stream_urb, dev->udev,
				  pipe,
				  pipe_info->transfer_buffer,
				  pipe_info->cur_transfer_size,
				  read_pipe_completion, pipe_info);

		pipe_info->urb_size = sizeof(pipe_info->stream_urb);
		dprintk(4, "submitting URB %p\n", pipe_info->stream_urb);
		retval = usb_submit_urb(pipe_info->stream_urb, GFP_KERNEL);
		if (retval) {
			printk(KERN_ERR "s2255: start read pipe failed\n");
			return retval;
		}
	}

	return 0;
}

/* starts acquisition process */
static int s2255_start_acquire(struct s2255_dev *dev, unsigned long chn)
{
	unsigned char *buffer;
	int res;
	unsigned long chn_rev;
	int j;
	if (chn >= MAX_CHANNELS) {
		dprintk(2, "start acquire failed, bad channel %lu\n", chn);
		return -1;
	}

	chn_rev = G_chnmap[chn];
	dprintk(1, "S2255: start acquire %lu \n", chn);

	buffer = kzalloc(512, GFP_KERNEL);
	if (buffer == NULL) {
		dev_err(&dev->udev->dev, "out of mem\n");
		return -ENOMEM;
	}

	dev->last_frame[chn] = -1;
	dev->bad_payload[chn] = 0;
	dev->cur_frame[chn] = 0;
	for (j = 0; j < SYS_FRAMES; j++) {
		dev->buffer[chn].frame[j].ulState = 0;
		dev->buffer[chn].frame[j].cur_size = 0;
	}

	/* send the start command */
	*(u32 *) buffer = IN_DATA_TOKEN;
	*((u32 *) buffer + 1) = (u32) chn_rev;
	*((u32 *) buffer + 2) = (u32) CMD_START;
	res = s2255_write_config(dev->udev, (unsigned char *)buffer, 512);
	if (res != 0)
		dev_err(&dev->udev->dev, "CMD_START error\n");

	dprintk(2, "start acquire exit[%lu] %d \n", chn, res);
	kfree(buffer);
	return 0;
}

static int s2255_stop_acquire(struct s2255_dev *dev, unsigned long chn)
{
	unsigned char *buffer;
	int res;
	unsigned long chn_rev;

	if (chn >= MAX_CHANNELS) {
		dprintk(2, "stop acquire failed, bad channel %lu\n", chn);
		return -1;
	}
	chn_rev = G_chnmap[chn];

	buffer = kzalloc(512, GFP_KERNEL);
	if (buffer == NULL) {
		dev_err(&dev->udev->dev, "out of mem\n");
		return -ENOMEM;
	}

	/* send the stop command */
	dprintk(4, "stop acquire %lu\n", chn);
	*(u32 *) buffer = IN_DATA_TOKEN;
	*((u32 *) buffer + 1) = (u32) chn_rev;
	*((u32 *) buffer + 2) = CMD_STOP;
	res = s2255_write_config(dev->udev, (unsigned char *)buffer, 512);

	if (res != 0)
		dev_err(&dev->udev->dev, "CMD_STOP error\n");

	dprintk(4, "stop acquire: releasing states \n");

	kfree(buffer);
	dev->b_acquire[chn] = 0;

2388
	return res;
2389 2390 2391 2392 2393 2394 2395
}

static void s2255_stop_readpipe(struct s2255_dev *dev)
{
	int j;

	if (dev == NULL) {
2396
		s2255_dev_err(&dev->udev->dev, "invalid device\n");
2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423
		return;
	}
	dprintk(4, "stop read pipe\n");
	for (j = 0; j < MAX_PIPE_BUFFERS; j++) {
		struct s2255_pipeinfo *pipe_info = &dev->pipes[j];
		if (pipe_info) {
			if (pipe_info->state == 0)
				continue;
			pipe_info->state = 0;
			pipe_info->prev_state = 1;

		}
	}

	for (j = 0; j < MAX_PIPE_BUFFERS; j++) {
		struct s2255_pipeinfo *pipe_info = &dev->pipes[j];
		if (pipe_info->stream_urb) {
			/* cancel urb */
			usb_kill_urb(pipe_info->stream_urb);
			usb_free_urb(pipe_info->stream_urb);
			pipe_info->stream_urb = NULL;
		}
	}
	dprintk(2, "s2255 stop read pipe: %d\n", j);
	return;
}

2424
static void s2255_fwload_start(struct s2255_dev *dev, int reset)
2425
{
2426 2427
	if (reset)
		s2255_reset_dsppower(dev);
2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449
	dev->fw_data->fw_size = dev->fw_data->fw->size;
	atomic_set(&dev->fw_data->fw_state, S2255_FW_NOTLOADED);
	memcpy(dev->fw_data->pfw_data,
	       dev->fw_data->fw->data, CHUNK_SIZE);
	dev->fw_data->fw_loaded = CHUNK_SIZE;
	usb_fill_bulk_urb(dev->fw_data->fw_urb, dev->udev,
			  usb_sndbulkpipe(dev->udev, 2),
			  dev->fw_data->pfw_data,
			  CHUNK_SIZE, s2255_fwchunk_complete,
			  dev->fw_data);
	mod_timer(&dev->timer, jiffies + HZ);
}

/* standard usb probe function */
static int s2255_probe(struct usb_interface *interface,
		       const struct usb_device_id *id)
{
	struct s2255_dev *dev = NULL;
	struct usb_host_interface *iface_desc;
	struct usb_endpoint_descriptor *endpoint;
	int i;
	int retval = -ENOMEM;
2450 2451
	__le32 *pdata;
	int fw_size;
2452 2453 2454 2455 2456 2457

	dprintk(2, "s2255: probe\n");

	/* allocate memory for our device state and initialize it to zero */
	dev = kzalloc(sizeof(struct s2255_dev), GFP_KERNEL);
	if (dev == NULL) {
2458
		s2255_dev_err(&interface->dev, "out of memory\n");
2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491
		goto error;
	}

	dev->fw_data = kzalloc(sizeof(struct s2255_fw), GFP_KERNEL);
	if (!dev->fw_data)
		goto error;

	mutex_init(&dev->lock);
	mutex_init(&dev->open_lock);

	/* grab usb_device and save it */
	dev->udev = usb_get_dev(interface_to_usbdev(interface));
	if (dev->udev == NULL) {
		dev_err(&interface->dev, "null usb device\n");
		retval = -ENODEV;
		goto error;
	}
	kref_init(&dev->kref);
	dprintk(1, "dev: %p, kref: %p udev %p interface %p\n", dev, &dev->kref,
		dev->udev, interface);
	dev->interface = interface;
	/* set up the endpoint information  */
	iface_desc = interface->cur_altsetting;
	dprintk(1, "num endpoints %d\n", iface_desc->desc.bNumEndpoints);
	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		endpoint = &iface_desc->endpoint[i].desc;
		if (!dev->read_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
			/* we found the bulk in endpoint */
			dev->read_endpoint = endpoint->bEndpointAddress;
		}
	}

	if (!dev->read_endpoint) {
2492
		dev_err(&interface->dev, "Could not find bulk-in endpoint\n");
2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505
		goto error;
	}

	/* set intfdata */
	usb_set_intfdata(interface, dev);

	dprintk(100, "after intfdata %p\n", dev);

	init_timer(&dev->timer);
	dev->timer.function = s2255_timer;
	dev->timer.data = (unsigned long)dev->fw_data;

	init_waitqueue_head(&dev->fw_data->wait_fw);
2506 2507
	for (i = 0; i < MAX_CHANNELS; i++)
		init_waitqueue_head(&dev->wait_setmode[i]);
2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526


	dev->fw_data->fw_urb = usb_alloc_urb(0, GFP_KERNEL);

	if (!dev->fw_data->fw_urb) {
		dev_err(&interface->dev, "out of memory!\n");
		goto error;
	}
	dev->fw_data->pfw_data = kzalloc(CHUNK_SIZE, GFP_KERNEL);
	if (!dev->fw_data->pfw_data) {
		dev_err(&interface->dev, "out of memory!\n");
		goto error;
	}
	/* load the first chunk */
	if (request_firmware(&dev->fw_data->fw,
			     FIRMWARE_FILE_NAME, &dev->udev->dev)) {
		printk(KERN_ERR "sensoray 2255 failed to get firmware\n");
		goto error;
	}
2527 2528 2529
	/* check the firmware is valid */
	fw_size = dev->fw_data->fw->size;
	pdata = (__le32 *) &dev->fw_data->fw->data[fw_size - 8];
2530

2531 2532 2533 2534 2535 2536 2537 2538 2539 2540
	if (*pdata != S2255_FW_MARKER) {
		printk(KERN_INFO "Firmware invalid.\n");
		retval = -ENODEV;
		goto error;
	} else {
		/* make sure firmware is the latest */
		__le32 *pRel;
		pRel = (__le32 *) &dev->fw_data->fw->data[fw_size - 4];
		printk(KERN_INFO "s2255 dsp fw version %x\n", *pRel);
	}
2541 2542
	/* loads v4l specific */
	s2255_probe_v4l(dev);
2543
	usb_reset_device(dev->udev);
2544 2545 2546 2547 2548 2549
	/* load 2255 board specific */
	s2255_board_init(dev);

	dprintk(4, "before probe done %p\n", dev);
	spin_lock_init(&dev->slock);

2550
	s2255_fwload_start(dev, 0);
2551 2552 2553 2554 2555 2556 2557 2558 2559 2560
	dev_info(&interface->dev, "Sensoray 2255 detected\n");
	return 0;
error:
	return retval;
}

/* disconnect routine. when board is removed physically or with rmmod */
static void s2255_disconnect(struct usb_interface *interface)
{
	struct s2255_dev *dev = NULL;
2561
	int i;
2562 2563
	dprintk(1, "s2255: disconnect interface %p\n", interface);
	dev = usb_get_intfdata(interface);
2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579

	/*
	 * wake up any of the timers to allow open_lock to be
	 * acquired sooner
	 */
	atomic_set(&dev->fw_data->fw_state, S2255_FW_DISCONNECTING);
	wake_up(&dev->fw_data->wait_fw);
	for (i = 0; i < MAX_CHANNELS; i++) {
		dev->setmode_ready[i] = 1;
		wake_up(&dev->wait_setmode[i]);
	}

	mutex_lock(&dev->open_lock);
	usb_set_intfdata(interface, NULL);
	mutex_unlock(&dev->open_lock);

2580 2581 2582 2583 2584 2585 2586 2587
	if (dev) {
		kref_put(&dev->kref, s2255_destroy);
		dprintk(1, "s2255drv: disconnect\n");
		dev_info(&interface->dev, "s2255usb now disconnected\n");
	}
}

static struct usb_driver s2255_driver = {
2588
	.name = S2255_DRIVER_NAME,
2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601
	.probe = s2255_probe,
	.disconnect = s2255_disconnect,
	.id_table = s2255_table,
};

static int __init usb_s2255_init(void)
{
	int result;

	/* register this driver with the USB subsystem */
	result = usb_register(&s2255_driver);

	if (result)
2602 2603
		pr_err(KBUILD_MODNAME
			": usb_register failed. Error number %d\n", result);
2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619

	dprintk(2, "s2255_init: done\n");
	return result;
}

static void __exit usb_s2255_exit(void)
{
	usb_deregister(&s2255_driver);
}

module_init(usb_s2255_init);
module_exit(usb_s2255_exit);

MODULE_DESCRIPTION("Sensoray 2255 Video for Linux driver");
MODULE_AUTHOR("Dean Anderson (Sensoray Company Inc.)");
MODULE_LICENSE("GPL");