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/* Special Initializers for certain USB Mass Storage devices
*
* $Id: initializers.c,v 1.2 2000/09/06 22:35:57 mdharm Exp $
*
* Current development and maintenance by:
* (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
*
* This driver is based on the 'USB Mass Storage Class' document. This
* describes in detail the protocol used to communicate with such
* devices. Clearly, the designers had SCSI and ATAPI commands in
* mind when they created this document. The commands are all very
* similar to commands in the SCSI-II and ATAPI specifications.
*
* It is important to note that in a number of cases this class
* exhibits class-specific exemptions from the USB specification.
* Notably the usage of NAK, STALL and ACK differs from the norm, in
* that they are used to communicate wait, failed and OK on commands.
*
* Also, for certain devices, the interrupt endpoint is used to convey
* status of a command.
*
* Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
* information about 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, 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 "initializers.h"
#include "debug.h"
/* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
* mode */
int usb_stor_euscsi_init(struct us_data *us)
{
unsigned char data = 0x1;
int result;
#ifdef CONFIG_BOARD_W90N745
unsigned char *datap = kmalloc(sizeof(unsigned char)*1, GFP_KERNEL);
if(!datap) {
printk("Can't alloc memory for eusci_init\n");
return 0;
}
datap = (unsigned char *)((unsigned long)datap | 0x80000000);
#endif
US_DEBUGP("Attempting to init eUSCSI bridge...\n");
#ifndef CONFIG_BOARD_W90N745
result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
0x01, 0x0, &data, 0x1, 5*HZ);
US_DEBUGP("-- result is %d\n", result);
US_DEBUGP("-- data afterwards is %d\n", data);
#else
result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
0x01, 0x0, datap, 0x1, 5*HZ);
US_DEBUGP("-- result is %d\n", result);
US_DEBUGP("-- data afterwards is %d\n", *datap);
if(datap)
kfree((unsigned char *)((unsigned long)datap & 0x7fffffff));
#endif
return 0;
}
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