forked from mirrors/linux
077af794d9
The old URL for usb-storage driver help is long gone. So remove it from the comments to not confuse people anymore. Reported-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Special Initializers for certain USB Mass Storage devices
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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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#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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/*
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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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*/
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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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usb_stor_dbg(us, "Attempting to init eUSCSI bridge...\n");
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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, NULL, 0x0, 5 * HZ);
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usb_stor_dbg(us, "-- result is %d\n", result);
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return 0;
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}
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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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*/
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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;
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unsigned int partial;
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static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
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usb_stor_dbg(us, "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 -EIO;
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usb_stor_dbg(us, "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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if (res)
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return -EIO;
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return 0;
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}
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/* This places the HUAWEI E220 devices in multi-port mode */
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int usb_stor_huawei_e220_init(struct us_data *us)
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{
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int result;
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result = usb_stor_control_msg(us, us->send_ctrl_pipe,
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USB_REQ_SET_FEATURE,
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USB_TYPE_STANDARD | USB_RECIP_DEVICE,
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0x01, 0x0, NULL, 0x0, 1 * HZ);
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usb_stor_dbg(us, "Huawei mode set result is %d\n", result);
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return 0;
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}
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