167 lines
5.0 KiB
C
167 lines
5.0 KiB
C
/* Special Initializers for certain USB Mass Storage devices
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*
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* $Id: initializers.c,v 1.2 2000/09/06 22:35:57 mdharm Exp $
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*
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* Current development and maintenance by:
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* (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
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*
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* This driver is based on the 'USB Mass Storage Class' document. This
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* describes in detail the protocol used to communicate with such
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* devices. Clearly, the designers had SCSI and ATAPI commands in
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* mind when they created this document. The commands are all very
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* similar to commands in the SCSI-II and ATAPI specifications.
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*
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* It is important to note that in a number of cases this class
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* exhibits class-specific exemptions from the USB specification.
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* Notably the usage of NAK, STALL and ACK differs from the norm, in
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* that they are used to communicate wait, failed and OK on commands.
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*
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* Also, for certain devices, the interrupt endpoint is used to convey
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* status of a command.
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*
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* Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
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* information about this driver.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/sched.h>
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#include <linux/errno.h>
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#include "usb.h"
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#include "initializers.h"
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#include "debug.h"
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#include "transport.h"
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#define RIO_MSC 0x08
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#define RIOP_INIT "RIOP\x00\x01\x08"
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#define RIOP_INIT_LEN 7
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#define RIO_SEND_LEN 40
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#define RIO_RECV_LEN 0x200
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/* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
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* mode */
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int usb_stor_euscsi_init(struct us_data *us)
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{
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int result;
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US_DEBUGP("Attempting to init eUSCSI bridge...\n");
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us->iobuf[0] = 0x1;
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result = usb_stor_control_msg(us, us->send_ctrl_pipe,
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0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
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0x01, 0x0, us->iobuf, 0x1, 5*HZ);
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US_DEBUGP("-- result is %d\n", result);
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return 0;
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}
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/* This function is required to activate all four slots on the UCR-61S2B
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* flash reader */
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int usb_stor_ucr61s2b_init(struct us_data *us)
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{
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struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
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struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
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int res, partial;
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static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
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US_DEBUGP("Sending UCR-61S2B initialization packet...\n");
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bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
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bcb->Tag = 0;
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bcb->DataTransferLength = cpu_to_le32(0);
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bcb->Flags = bcb->Lun = 0;
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bcb->Length = sizeof(init_string) - 1;
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memset(bcb->CDB, 0, sizeof(bcb->CDB));
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memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
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res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
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US_BULK_CB_WRAP_LEN, &partial);
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if(res)
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return res;
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US_DEBUGP("Getting status packet...\n");
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res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
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US_BULK_CS_WRAP_LEN, &partial);
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return (res ? -1 : 0);
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}
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/* Place the Rio Karma into mass storage mode.
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*
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* The initialization begins by sending 40 bytes starting
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* RIOP\x00\x01\x08\x00, which the device will ack with a 512-byte
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* packet with the high four bits set and everything else null.
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*
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* Next, we send RIOP\x80\x00\x08\x00. Each time, a 512 byte response
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* must be read, but we must loop until byte 5 in the response is 0x08,
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* indicating success. */
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int rio_karma_init(struct us_data *us)
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{
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int result, partial;
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char *recv;
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unsigned long timeout;
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// us->iobuf is big enough to hold cmd but not receive
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if (!(recv = kmalloc(RIO_RECV_LEN, GFP_KERNEL)))
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goto die_nomem;
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US_DEBUGP("Initializing Karma...\n");
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memset(us->iobuf, 0, RIO_SEND_LEN);
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memcpy(us->iobuf, RIOP_INIT, RIOP_INIT_LEN);
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result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
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us->iobuf, RIO_SEND_LEN, &partial);
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if (result != USB_STOR_XFER_GOOD)
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goto die;
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result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
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recv, RIO_RECV_LEN, &partial);
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if (result != USB_STOR_XFER_GOOD)
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goto die;
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us->iobuf[4] = 0x80;
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us->iobuf[5] = 0;
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timeout = jiffies + msecs_to_jiffies(3000);
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for (;;) {
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US_DEBUGP("Sending init command\n");
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result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
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us->iobuf, RIO_SEND_LEN, &partial);
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if (result != USB_STOR_XFER_GOOD)
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goto die;
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result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
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recv, RIO_RECV_LEN, &partial);
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if (result != USB_STOR_XFER_GOOD)
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goto die;
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if (recv[5] == RIO_MSC)
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break;
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if (time_after(jiffies, timeout))
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goto die;
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msleep(10);
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}
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US_DEBUGP("Karma initialized.\n");
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kfree(recv);
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return 0;
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die:
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kfree(recv);
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die_nomem:
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US_DEBUGP("Could not initialize karma.\n");
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return USB_STOR_TRANSPORT_FAILED;
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}
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