path: root/drivers/media/video/gspca/mr97310a.c

/*
 * Mars MR97310A library
 *
 * The original mr97310a driver, which supported the Aiptek Pencam VGA+, is
 * Copyright (C) 2009 Kyle Guinn <elyk03@gmail.com>
 *
 * Support for the MR97310A cameras in addition to the Aiptek Pencam VGA+
 * and for the routines for detecting and classifying these various cameras,
 * is Copyright (C) 2009 Theodore Kilgore <kilgota@auburn.edu>
 *
 * Support for the control settings for the CIF cameras is
 * Copyright (C) 2009 Hans de Goede <hdegoede@redhat.com> and
 * Thomas Kaiser <thomas@kaiser-linux.li>
 *
 * Support for the control settings for the VGA cameras is
 * Copyright (C) 2009 Theodore Kilgore <kilgota@auburn.edu>
 *
 * Several previously unsupported cameras are owned and have been tested by
 * Hans de Goede <hdegoede@redhat.com> and
 * Thomas Kaiser <thomas@kaiser-linux.li> and
 * Theodore Kilgore <kilgota@auburn.edu> and
 * Edmond Rodriguez <erodrig_97@yahoo.com> and
 * Aurelien Jacobs <aurel@gnuage.org>
 *
 * The MR97311A support in gspca/mars.c has been helpful in understanding some
 * of the registers in these cameras.
 *
 * 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
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#define MODULE_NAME "mr97310a"

#include "gspca.h"

#define CAM_TYPE_CIF			0
#define CAM_TYPE_VGA			1

#define MR97310A_BRIGHTNESS_DEFAULT	0

#define MR97310A_EXPOSURE_MIN		0
#define MR97310A_EXPOSURE_MAX		4095
#define MR97310A_EXPOSURE_DEFAULT	1000

#define MR97310A_GAIN_MIN		0
#define MR97310A_GAIN_MAX		31
#define MR97310A_GAIN_DEFAULT		25

#define MR97310A_CONTRAST_MIN		0
#define MR97310A_CONTRAST_MAX		31
#define MR97310A_CONTRAST_DEFAULT	23

#define MR97310A_CS_GAIN_MIN		0
#define MR97310A_CS_GAIN_MAX		0x7ff
#define MR97310A_CS_GAIN_DEFAULT	0x110

#define MR97310A_CID_CLOCKDIV (V4L2_CTRL_CLASS_USER + 0x1000)
#define MR97310A_MIN_CLOCKDIV_MIN	3
#define MR97310A_MIN_CLOCKDIV_MAX	8
#define MR97310A_MIN_CLOCKDIV_DEFAULT	3

MODULE_AUTHOR("Kyle Guinn <elyk03@gmail.com>,"
	      "Theodore Kilgore <kilgota@auburn.edu>");
MODULE_DESCRIPTION("GSPCA/Mars-Semi MR97310A USB Camera Driver");
MODULE_LICENSE("GPL");

/* global parameters */
static int force_sensor_type = -1;
module_param(force_sensor_type, int, 0644);
MODULE_PARM_DESC(force_sensor_type, "Force sensor type (-1 (auto), 0 or 1)");

/* specific webcam descriptor */
struct sd {
	struct gspca_dev gspca_dev;  /* !! must be the first item */
	struct { /* exposure/min_clockdiv control cluster */
		struct v4l2_ctrl *exposure;
		struct v4l2_ctrl *min_clockdiv;
	};
	u8 sof_read;
	u8 cam_type;	/* 0 is CIF and 1 is VGA */
	u8 sensor_type;	/* We use 0 and 1 here, too. */
	u8 do_lcd_stop;
	u8 adj_colors;
};

struct sensor_w_data {
	u8 reg;
	u8 flags;
	u8 data[16];
	int len;
};

static void sd_stopN(struct gspca_dev *gspca_dev);

static const struct v4l2_pix_format vga_mode[] = {
	{160, 120, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
		.bytesperline = 160,
		.sizeimage = 160 * 120,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 4},
	{176, 144, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
		.bytesperline = 176,
		.sizeimage = 176 * 144,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 3},
	{320, 240, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
		.bytesperline = 320,
		.sizeimage = 320 * 240,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 2},
	{352, 288, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
		.bytesperline = 352,
		.sizeimage = 352 * 288,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 1},
	{640, 480, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
		.bytesperline = 640,
		.sizeimage = 640 * 480,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0},
};

/* the bytes to write are in gspca_dev->usb_buf */
static int mr_write(struct gspca_dev *gspca_dev, int len)
{
	int rc;

	rc = usb_bulk_msg(gspca_dev->dev,
			  usb_sndbulkpipe(gspca_dev->dev, 4),
			  gspca_dev->usb_buf, len, NULL, 500);
	if (rc < 0)
		pr_err("reg write [%02x] error %d\n",
		       gspca_dev->usb_buf[0], rc);
	return rc;
}

/* the bytes are read into gspca_dev->usb_buf */
static int mr_read(struct gspca_dev *gspca_dev, int len)
{
	int rc;

	rc = usb_bulk_msg(gspca_dev->dev,
			  usb_rcvbulkpipe(gspca_dev->dev, 3),
			  gspca_dev->usb_buf, len, NULL, 500);
	if (rc < 0)
		pr_err("reg read [%02x] error %d\n",
		       gspca_dev->usb_buf