diff options
Diffstat (limited to 'drivers/usb/storage/initializers.c')
| -rw-r--r-- | drivers/usb/storage/initializers.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/usb/storage/initializers.c b/drivers/usb/storage/initializers.c new file mode 100644 index 00000000000..5b06f9240d0 --- /dev/null +++ b/drivers/usb/storage/initializers.c @@ -0,0 +1,93 @@ +/* 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" + +/* 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); +} |