| /* | |
| * Driver for USB Mass Storage compliant devices | |
| * Transport Functions Header File | |
| * | |
| * 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. | |
| */ | |
| #ifndef _TRANSPORT_H_ | |
| #define _TRANSPORT_H_ | |
| #include <linux/blkdev.h> | |
| /* | |
| * usb_stor_bulk_transfer_xxx() return codes, in order of severity | |
| */ | |
| #define USB_STOR_XFER_GOOD 0 /* good transfer */ | |
| #define USB_STOR_XFER_SHORT 1 /* transferred less than expected */ | |
| #define USB_STOR_XFER_STALLED 2 /* endpoint stalled */ | |
| #define USB_STOR_XFER_LONG 3 /* device tried to send too much */ | |
| #define USB_STOR_XFER_ERROR 4 /* transfer died in the middle */ | |
| /* | |
| * Transport return codes | |
| */ | |
| #define USB_STOR_TRANSPORT_GOOD 0 /* Transport good, command good */ | |
| #define USB_STOR_TRANSPORT_FAILED 1 /* Transport good, command failed */ | |
| #define USB_STOR_TRANSPORT_NO_SENSE 2 /* Command failed, no auto-sense */ | |
| #define USB_STOR_TRANSPORT_ERROR 3 /* Transport bad (i.e. device dead) */ | |
| /* | |
| * We used to have USB_STOR_XFER_ABORTED and USB_STOR_TRANSPORT_ABORTED | |
| * return codes. But now the transport and low-level transfer routines | |
| * treat an abort as just another error (-ENOENT for a cancelled URB). | |
| * It is up to the invoke_transport() function to test for aborts and | |
| * distinguish them from genuine communication errors. | |
| */ | |
| /* | |
| * CBI accept device specific command | |
| */ | |
| #define US_CBI_ADSC 0 | |
| extern int usb_stor_CB_transport(struct scsi_cmnd *, struct us_data*); | |
| extern int usb_stor_CB_reset(struct us_data*); | |
| extern int usb_stor_Bulk_transport(struct scsi_cmnd *, struct us_data*); | |
| extern int usb_stor_Bulk_max_lun(struct us_data*); | |
| extern int usb_stor_Bulk_reset(struct us_data*); | |
| extern void usb_stor_invoke_transport(struct scsi_cmnd *, struct us_data*); | |
| extern void usb_stor_stop_transport(struct us_data*); | |
| extern int usb_stor_control_msg(struct us_data *us, unsigned int pipe, | |
| u8 request, u8 requesttype, u16 value, u16 index, | |
| void *data, u16 size, int timeout); | |
| extern int usb_stor_clear_halt(struct us_data *us, unsigned int pipe); | |
| extern int usb_stor_ctrl_transfer(struct us_data *us, unsigned int pipe, | |
| u8 request, u8 requesttype, u16 value, u16 index, | |
| void *data, u16 size); | |
| extern int usb_stor_bulk_transfer_buf(struct us_data *us, unsigned int pipe, | |
| void *buf, unsigned int length, unsigned int *act_len); | |
| extern int usb_stor_bulk_transfer_sg(struct us_data *us, unsigned int pipe, | |
| void *buf, unsigned int length, int use_sg, int *residual); | |
| extern int usb_stor_bulk_srb(struct us_data* us, unsigned int pipe, | |
| struct scsi_cmnd* srb); | |
| extern int usb_stor_port_reset(struct us_data *us); | |
| #endif |