projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* Driver for USB Mass Storage compliant devices |
| 2 | * Protocol Functions Header File | |
| 3 | * | |
| 1da177e4 LT |
4 | * Current development and maintenance by: |
| 5 | * (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net) | |
| 6 | * | |
| 7 | * This driver is based on the 'USB Mass Storage Class' document. This | |
| 8 | * describes in detail the protocol used to communicate with such | |
| 9 | * devices. Clearly, the designers had SCSI and ATAPI commands in | |
| 10 | * mind when they created this document. The commands are all very | |
| 11 | * similar to commands in the SCSI-II and ATAPI specifications. | |
| 12 | * | |
| 13 | * It is important to note that in a number of cases this class | |
| 14 | * exhibits class-specific exemptions from the USB specification. | |
| 15 | * Notably the usage of NAK, STALL and ACK differs from the norm, in | |
| 16 | * that they are used to communicate wait, failed and OK on commands. | |
| 17 | * | |
| 18 | * Also, for certain devices, the interrupt endpoint is used to convey | |
| 19 | * status of a command. | |
| 20 | * | |
| 21 | * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more | |
| 22 | * information about this driver. | |
| 23 | * | |
| 24 | * This program is free software; you can redistribute it and/or modify it | |
| 25 | * under the terms of the GNU General Public License as published by the | |
| 26 | * Free Software Foundation; either version 2, or (at your option) any | |
| 27 | * later version. | |
| 28 | * | |
| 29 | * This program is distributed in the hope that it will be useful, but | |
| 30 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 31 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 32 | * General Public License for more details. | |
| 33 | * | |
| 34 | * You should have received a copy of the GNU General Public License along | |
| 35 | * with this program; if not, write to the Free Software Foundation, Inc., | |
| 36 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 37 | */ | |
| 38 | ||
| 39 | #ifndef _PROTOCOL_H_ | |
| 40 | #define _PROTOCOL_H_ | |
| 41 | ||
| 1da177e4 | 42 | /* Protocol handling routines */ |
| 3dae5345 | 43 | extern void usb_stor_pad12_command(struct scsi_cmnd*, struct us_data*); |
| 1da177e4 LT |
44 | extern void usb_stor_ufi_command(struct scsi_cmnd*, struct us_data*); |
| 45 | extern void usb_stor_transparent_scsi_command(struct scsi_cmnd*, | |
| 46 | struct us_data*); | |
| 47 | ||
| 48 | /* struct scsi_cmnd transfer buffer access utilities */ | |
| 49 | enum xfer_buf_dir {TO_XFER_BUF, FROM_XFER_BUF}; | |
| 50 | ||
| 51 | extern unsigned int usb_stor_access_xfer_buf(unsigned char *buffer, | |
| 1f6f31a0 | 52 | unsigned int buflen, struct scsi_cmnd *srb, struct scatterlist **, |
| 1da177e4 LT |
53 | unsigned int *offset, enum xfer_buf_dir dir); |
| 54 | ||
| 55 | extern void usb_stor_set_xfer_buf(unsigned char *buffer, | |
| 56 | unsigned int buflen, struct scsi_cmnd *srb); | |
| 57 | #endif |