/* 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 <linux/sched.h>
#include <linux/errno.h>
#include "usb.h"
#include "initializers.h"
#include "debug.h"
#include "transport.h"
#define RIO_MSC 0x08
#define RIOP_INIT "RIOP\x00\x01\x08"
#define RIOP_INIT_LEN 7
#define RIO_SEND_LEN 40
#define RIO_RECV_LEN 0x200
/* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
* mode */
int usb_stor_euscsi_init(struct us_data *us)
{
int result;
US_DEBUGP("Attempting to init eUSCSI bridge...\n");
us->iobuf[0] = 0x1;
result = usb_stor_control_msg(us, us->send_ctrl_pipe,
0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
0x01, 0x0, us->iobuf, 0x1, 5*HZ);
US_DEBUGP("-- result is %d\n", result);
return 0;
}
/* This function is required to activate all four slots on the UCR-61S2B
* flash reader */
int usb_stor_ucr61s2b_init(struct us_data *us)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
int res, partial;
static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
US_DEBUGP("Sending UCR-61S2B initialization packet...\n");
bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
bcb->Tag = 0;
bcb->DataTransferLength = cpu_to_le32(0);
bcb->Flags = bcb->Lun = 0;
bcb->Length = sizeof(init_string) - 1;
memset(bcb->CDB, 0, sizeof(bcb->CDB));
memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
US_BULK_CB_WRAP_LEN, &partial);
if(res)
return res;
US_DEBUGP("Getting status packet...\n");
res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
US_BULK_CS_WRAP_LEN, &partial);
return (res ? -1 : 0);
}
/* Place the Rio Karma into mass storage mode.
*
* The initialization begins by sending 40 bytes starting
* RIOP\x00\x01\x08\x00, which the device will ack with a 512-byte
* packet with the high four bits set and everything else null.
*
* Next, we send RIOP\x80\x00\x08\x00. Each time, a 512 byte response
* must be read, but we must loop until byte 5 in the response is 0x08,
* indicating success. */
int rio_karma_init(struct us_data *us)
{
int result, partial;
char *recv;
unsigned long timeout;
// us->iobuf is big enough to hold cmd but not receive
if (!(recv = kmalloc(RIO_RECV_LEN, GFP_KERNEL)))
goto die_nomem;
US_DEBUGP("Initializing Karma...\n");
memset(us->iobuf, 0, RIO_SEND_LEN);
memcpy(us->iobuf, RIOP_INIT, RIOP_INIT_LEN);
result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
us->iobuf, RIO_SEND_LEN, &partial);
if (result != USB_STOR_XFER_GOOD)
goto die;
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
recv, RIO_RECV_LEN, &partial);
if (result != USB_STOR_XFER_GOOD)
goto die;
us->iobuf[4] = 0x80;
us->iobuf[5] = 0;
timeout = jiffies + msecs_to_jiffies(3000);
for (;;) {
US_DEBUGP("Sending init command\n");
result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
us->iobuf, RIO_SEND_LEN, &partial);
if (result != USB_STOR_XFER_GOOD)
goto die;
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
recv, RIO_RECV_LEN, &partial);
if (result != USB_STOR_XFER_GOOD)
goto die;
if (recv[5] == RIO_MSC)
break;
if (time_after(jiffies, timeout))
goto die;
msleep(10);
}
US_DEBUGP("Karma initialized.\n");
kfree(recv);
return 0;
die:
kfree(recv);
die_nomem:
US_DEBUGP("Could not initialize karma.\n");
return USB_STOR_TRANSPORT_FAILED;
}
