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/*
* STV0680 USB Camera Driver
*
* Copyright (C) 2009 Hans de Goede <hdegoede@redhat.com>
*
* This module is adapted from the in kernel v4l1 stv680 driver:
*
* STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net)
*
* Thanks to STMicroelectronics for information on the usb commands, and
* to Steve Miller at STM for his help and encouragement while I was
* writing this driver.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define MODULE_NAME "stv0680"
#include "gspca.h"
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("STV0680 USB Camera Driver");
MODULE_LICENSE("GPL");
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
struct v4l2_pix_format mode;
u8 orig_mode;
u8 video_mode;
u8 current_mode;
};
static int stv_sndctrl(struct gspca_dev *gspca_dev, int set, u8 req, u16 val,
int size)
{
int ret = -1;
u8 req_type = 0;
unsigned int pipe = 0;
switch (set) {
case 0: /* 0xc1 */
req_type = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
pipe = usb_rcvctrlpipe(gspca_dev->dev, 0);
break;
case 1: /* 0x41 */
req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
pipe = usb_sndctrlpipe(gspca_dev->dev, 0);
break;
case 2: /* 0x80 */
req_type = USB_DIR_IN | USB_RECIP_DEVICE;
pipe = usb_rcvctrlpipe(gspca_dev->dev, 0);
break;
case 3: /* 0x40 */
req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
pipe = usb_sndctrlpipe(gspca_dev->dev, 0);
break;
}
ret = usb_control_msg(gspca_dev->dev, pipe,
req, req_type,
val, 0, gspca_dev->usb_buf, size, 500);
if ((ret < 0) && (req != 0x0a))
pr_err("usb_control_msg error %i, request = 0x%x, error = %i\n",
set, req, ret);
return ret;
}
static int stv0680_handle_error(struct gspca_dev *gspca_dev, int ret)
{
stv_sndctrl(gspca_dev, 0, 0x80, 0, 0x02); /* Get Last Error */
PERR("last error: %i, command = 0x%x",
gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
return ret;
}
static int stv0680_get_video_mode(struct gspca_dev *gspca_dev)
{
/* Note not sure if this init of usb_buf is really necessary */
memset(gspca_dev->usb_buf, 0, 8);
gspca_dev->usb_buf[0] = 0x0f;
if (stv_sndctrl(gspca_dev, 0, 0x87, 0, 0x08) != 0x08) {
PERR("Get_Camera_Mode failed");
return stv0680_handle_error(gspca_dev, -EIO);
}
return gspca_dev->usb_buf[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */
}
static int stv0680_set_video_mode(struct gspca_dev *gspca_dev, u8 mode)
{
struct sd *sd = (struct sd *) gspca_dev;
if (sd->current_mode == mode)
return 0;
memset(gspca_dev->usb_buf, 0, 8);
gspca_dev->usb_buf[0] = mode;
if (stv_sndctrl(gspca_dev, 3, 0x07, 0x0100, 0x08) != 0x08) {
PERR("Set_Camera_Mode failed");
return stv0680_handle_error(gspca_dev, -EIO);
}
/* Verify we got what we've asked for */
if (stv0680_get_video_mode(gspca_dev) != mode) {
PERR("Error setting camera video mode!");
return -EIO;
}
sd->current_mode = mode;
return 0;
}
/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
const struct usb_device_id *id)
{
int ret;
struct sd *sd = (struct sd *) gspca_dev;
struct cam *cam = &gspca_dev->cam;
/* Give the camera some time to settle, otherwise initialization will
fail on hotplug, and yes it really needs a full second. */
msleep(1000);
/* ping camera to be sure STV0680 is present */
if (stv_sndctrl(gspca_dev, 0, 0x88, 0x5678, 0x02) != 0x02 ||
gspca_dev->usb_buf[0] != 0x56 || gspca_dev->usb_buf[1] != 0x78) {
PERR("STV(e): camera ping failed!!");
return stv0680_handle_error(gspca_dev, -ENODEV);
}
/* get camera descriptor */
if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x09) != 0x09)
return stv0680_handle_error(gspca_dev, -ENODEV);
if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x22) != 0x22 ||
gspca_dev->usb_buf[7] != 0xa0 || gspca_dev->usb_buf[8] != 0x23) {
PERR("Could not get descriptor 0200.");
return stv0680_handle_error(gspca_dev, -ENODEV);
}
if (stv_sndctrl(gspca_dev, 0, 0x8a, 0, 0x02) != 0x02)
return stv0680_handle_error(gspca_dev, -ENODEV);
if (stv_sndctrl(gspca_dev, 0, 0x8b, 0, 0x24) != 0x24)
return stv0680_handle_error(gspca_dev, -ENODEV);
if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10)
return stv0680_handle_error(gspca_dev, -ENODEV);
if (!(gspca_dev->usb_buf[7] & 0x09)) {
PERR("Camera supports neither CIF nor QVGA mode");
return -ENODEV;
}
if (gspca_dev->usb_buf[7] & 0x01)
PDEBUG(D_PROBE, "Camera supports CIF mode");
if (gspca_dev->usb_buf[7] & 0x02)
PDEBUG(D_PROBE, "Camera supports VGA mode");
if (gspca_dev->usb_buf[7] & 0x04)
PDEBUG(D_PROBE, "Camera supports QCIF mode");
if (gspca_dev->usb_buf[7] & 0x08)
PDEBUG(D_PROBE, "Camera supports QVGA mode");
if (gspca_dev->usb_buf[7] & 0x01)
sd->video_mode = 0x00; /* CIF */
else
sd->video_mode = 0x03; /* QVGA */
/* FW rev, ASIC rev, sensor ID */
PDEBUG(D_PROBE, "Firmware rev is %i.%i",
gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
PDEBUG(D_PROBE, "ASIC rev is %i.%i",
gspca_dev->usb_buf[2], gspca_dev->usb_buf[3]);
PDEBUG(D_PROBE, "Sensor ID is %i",
(gspca_dev->usb_buf[4]*16) + (gspca_dev->usb_buf[5]>>4));
ret = stv0680_get_video_mode(gspca_dev);
if (ret < 0)
return ret;
sd->current_mode = sd->orig_mode = ret;
ret = stv0680_set_video_mode(gspca_dev, sd->video_mode);
if (ret < 0)
return ret;
/* Get mode details */
if (stv_sndctrl(gspca_dev, 0, 0x8f, 0, 0x10) != 0x10)
return stv0680_handle_error(gspca_dev, -EIO);
cam->bulk = 1;
cam->bulk_nurbs = 1; /* The cam cannot handle more */
cam->bulk_size = (gspca_dev->usb_buf[0] << 24) |
(gspca_dev->usb_buf[1] << 16) |
(gspca_dev->usb_buf[2] << 8) |
(gspca_dev->usb_buf[3]);
sd->mode.width = (gspca_dev->usb_buf[4] << 8) |
(gspca_dev->usb_buf[5]); /* 322, 356, 644 */
sd->mode.height = (gspca_dev->usb_buf[6] << 8) |
(gspca_dev->usb_buf[7]); /* 242, 292, 484 */
sd->mode.pixelformat = V4L2_PIX_FMT_STV0680;
sd->mode.field = V4L2_FIELD_NONE;
sd->mode.bytesperline = sd->mode.width;
sd->mode.sizeimage
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