1/* Special Initializers for certain USB Mass Storage devices 2 * 3 * $Id: initializers.c,v 1.1.1.1 2008/10/15 03:27:04 james26_jang 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 "initializers.h" 41#include "debug.h" 42#include "transport.h" 43 44/* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target 45 * mode */ 46int usb_stor_euscsi_init(struct us_data *us) 47{ 48 unsigned char data = 0x1; 49 int result; 50 51 US_DEBUGP("Attempting to init eUSCSI bridge...\n"); 52 result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0), 53 0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR, 54 0x01, 0x0, &data, 0x1, 5*HZ); 55 US_DEBUGP("-- result is %d\n", result); 56 US_DEBUGP("-- data afterwards is %d\n", data); 57 58 return 0; 59} 60 61/* This function is required to activate all four slots on the UCR-61S2B 62 * flash reader */ 63 64int usb_stor_ucr61s2b_init(struct us_data *us) 65{ 66 int pipe; 67 struct bulk_cb_wrap *bcb; 68 struct bulk_cs_wrap *bcs; 69 int res, partial; 70 71 bcb = kmalloc(sizeof *bcb, in_interrupt() ? GFP_ATOMIC : GFP_NOIO); 72 if (!bcb) { 73 return(-1); 74 } 75 bcs = kmalloc(sizeof *bcs, in_interrupt() ? GFP_ATOMIC : GFP_NOIO); 76 if (!bcs) { 77 kfree(bcb); 78 return(-1); 79 } 80 81 US_DEBUGP("Sending UCR-61S2B initialization packet...\n"); 82 83 bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN); 84 bcb->Tag = ++(us->tag); 85 bcb->DataTransferLength = cpu_to_le32(0); 86 bcb->Flags = bcb->Lun = 0; 87 bcb->Length = sizeof(UCR61S2B_INIT); 88 memset(bcb->CDB, 0, sizeof(bcb->CDB)); 89 memcpy(bcb->CDB, UCR61S2B_INIT, sizeof(UCR61S2B_INIT)); 90 91 pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out); 92 res = usb_stor_bulk_msg(us, bcb, pipe, US_BULK_CB_WRAP_LEN, &partial); 93 US_DEBUGP("-- result is %d\n", res); 94 kfree(bcb); 95 96 if(res) { 97 kfree(bcs); 98 return(res); 99 } 100 101 pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in); 102 res = usb_stor_bulk_msg(us, bcs, pipe, US_BULK_CS_WRAP_LEN, &partial); 103 US_DEBUGP("-- result of status read is %d\n", res); 104 105 kfree(bcs); 106 107 return(res ? -1 : 0); 108} 109