| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* Driver for USB Mass Storage compliant devices |
| 2 | * Protocol Functions Header File |
| 3 | * |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | /* Protocol handling routines */ |
| 43 | extern void usb_stor_ATAPI_command(struct scsi_cmnd*, struct us_data*); |
| 44 | extern void usb_stor_qic157_command(struct scsi_cmnd*, struct us_data*); |
| 45 | extern void usb_stor_ufi_command(struct scsi_cmnd*, struct us_data*); |
| 46 | extern void usb_stor_transparent_scsi_command(struct scsi_cmnd*, |
| 47 | struct us_data*); |
| 48 | |
| 49 | /* struct scsi_cmnd transfer buffer access utilities */ |
| 50 | enum xfer_buf_dir {TO_XFER_BUF, FROM_XFER_BUF}; |
| 51 | |
| 52 | extern unsigned int usb_stor_access_xfer_buf(unsigned char *buffer, |
| Jens Axboe | 1f6f31a | 2007-05-11 12:33:09 +0200 | [diff] [blame] | 53 | unsigned int buflen, struct scsi_cmnd *srb, struct scatterlist **, |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | unsigned int *offset, enum xfer_buf_dir dir); |
| 55 | |
| 56 | extern void usb_stor_set_xfer_buf(unsigned char *buffer, |
| 57 | unsigned int buflen, struct scsi_cmnd *srb); |
| 58 | #endif |