| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* Special Initializers for certain USB Mass Storage devices |
| 2 | * |
| 3 | * $Id: initializers.c,v 1.2 2000/09/06 22:35:57 mdharm Exp $ |
| 4 | * |
| 5 | * Current development and maintenance by: |
| 6 | * (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net) |
| 7 | * |
| 8 | * This driver is based on the 'USB Mass Storage Class' document. This |
| 9 | * describes in detail the protocol used to communicate with such |
| 10 | * devices. Clearly, the designers had SCSI and ATAPI commands in |
| 11 | * mind when they created this document. The commands are all very |
| 12 | * similar to commands in the SCSI-II and ATAPI specifications. |
| 13 | * |
| 14 | * It is important to note that in a number of cases this class |
| 15 | * exhibits class-specific exemptions from the USB specification. |
| 16 | * Notably the usage of NAK, STALL and ACK differs from the norm, in |
| 17 | * that they are used to communicate wait, failed and OK on commands. |
| 18 | * |
| 19 | * Also, for certain devices, the interrupt endpoint is used to convey |
| 20 | * status of a command. |
| 21 | * |
| 22 | * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more |
| 23 | * information about this driver. |
| 24 | * |
| 25 | * This program is free software; you can redistribute it and/or modify it |
| 26 | * under the terms of the GNU General Public License as published by the |
| 27 | * Free Software Foundation; either version 2, or (at your option) any |
| 28 | * later version. |
| 29 | * |
| 30 | * This program is distributed in the hope that it will be useful, but |
| 31 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 32 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 33 | * General Public License for more details. |
| 34 | * |
| 35 | * You should have received a copy of the GNU General Public License along |
| 36 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 37 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 38 | */ |
| 39 | |
| 40 | #include <linux/sched.h> |
| 41 | #include <linux/errno.h> |
| 42 | |
| 43 | #include "usb.h" |
| 44 | #include "initializers.h" |
| 45 | #include "debug.h" |
| 46 | #include "transport.h" |
| 47 | |
| 48 | /* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target |
| 49 | * mode */ |
| 50 | int usb_stor_euscsi_init(struct us_data *us) |
| 51 | { |
| 52 | int result; |
| 53 | |
| 54 | US_DEBUGP("Attempting to init eUSCSI bridge...\n"); |
| 55 | us->iobuf[0] = 0x1; |
| 56 | result = usb_stor_control_msg(us, us->send_ctrl_pipe, |
| 57 | 0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR, |
| 58 | 0x01, 0x0, us->iobuf, 0x1, 5*HZ); |
| 59 | US_DEBUGP("-- result is %d\n", result); |
| 60 | |
| 61 | return 0; |
| 62 | } |
| 63 | |
| 64 | /* This function is required to activate all four slots on the UCR-61S2B |
| 65 | * flash reader */ |
| 66 | int usb_stor_ucr61s2b_init(struct us_data *us) |
| 67 | { |
| 68 | struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf; |
| 69 | struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf; |
| 70 | int res, partial; |
| 71 | static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS"; |
| 72 | |
| 73 | US_DEBUGP("Sending UCR-61S2B initialization packet...\n"); |
| 74 | |
| 75 | bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN); |
| 76 | bcb->Tag = 0; |
| 77 | bcb->DataTransferLength = cpu_to_le32(0); |
| 78 | bcb->Flags = bcb->Lun = 0; |
| 79 | bcb->Length = sizeof(init_string) - 1; |
| 80 | memset(bcb->CDB, 0, sizeof(bcb->CDB)); |
| 81 | memcpy(bcb->CDB, init_string, sizeof(init_string) - 1); |
| 82 | |
| 83 | res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb, |
| 84 | US_BULK_CB_WRAP_LEN, &partial); |
| 85 | if(res) |
| 86 | return res; |
| 87 | |
| 88 | US_DEBUGP("Getting status packet...\n"); |
| 89 | res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, |
| 90 | US_BULK_CS_WRAP_LEN, &partial); |
| 91 | |
| 92 | return (res ? -1 : 0); |
| 93 | } |