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94 lines
2.8 KiB
94 lines
2.8 KiB
// 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 ([email protected]) |
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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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