1 /* Special Initializers for certain USB Mass Storage devices 2 * 3 * Current development and maintenance by: 4 * (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net) 5 * 6 * This driver is based on the 'USB Mass Storage Class' document. This 7 * describes in detail the protocol used to communicate with such 8 * devices. Clearly, the designers had SCSI and ATAPI commands in 9 * mind when they created this document. The commands are all very 10 * similar to commands in the SCSI-II and ATAPI specifications. 11 * 12 * It is important to note that in a number of cases this class 13 * exhibits class-specific exemptions from the USB specification. 14 * Notably the usage of NAK, STALL and ACK differs from the norm, in 15 * that they are used to communicate wait, failed and OK on commands. 16 * 17 * Also, for certain devices, the interrupt endpoint is used to convey 18 * status of a command. 19 * 20 * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more 21 * information about this driver. 22 * 23 * This program is free software; you can redistribute it and/or modify it 24 * under the terms of the GNU General Public License as published by the 25 * Free Software Foundation; either version 2, or (at your option) any 26 * later version. 27 * 28 * This program is distributed in the hope that it will be useful, but 29 * WITHOUT ANY WARRANTY; without even the implied warranty of 30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 31 * General Public License for more details. 32 * 33 * You should have received a copy of the GNU General Public License along 34 * with this program; if not, write to the Free Software Foundation, Inc., 35 * 675 Mass Ave, Cambridge, MA 02139, USA. 36 */ 37 38 #include <linux/errno.h> 39 40 #include "usb.h" 41 #include "initializers.h" 42 #include "debug.h" 43 #include "transport.h" 44 45 /* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target 46 * mode */ 47 int usb_stor_euscsi_init(struct us_data *us) 48 { 49 int result; 50 51 US_DEBUGP("Attempting to init eUSCSI bridge...\n"); 52 us->iobuf[0] = 0x1; 53 result = usb_stor_control_msg(us, us->send_ctrl_pipe, 54 0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR, 55 0x01, 0x0, us->iobuf, 0x1, 5000); 56 US_DEBUGP("-- result is %d\n", result); 57 58 return 0; 59 } 60 61 /* This function is required to activate all four slots on the UCR-61S2B 62 * flash reader */ 63 int usb_stor_ucr61s2b_init(struct us_data *us) 64 { 65 struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf; 66 struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf; 67 int res; 68 unsigned int partial; 69 static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS"; 70 71 US_DEBUGP("Sending UCR-61S2B initialization packet...\n"); 72 73 bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN); 74 bcb->Tag = 0; 75 bcb->DataTransferLength = cpu_to_le32(0); 76 bcb->Flags = bcb->Lun = 0; 77 bcb->Length = sizeof(init_string) - 1; 78 memset(bcb->CDB, 0, sizeof(bcb->CDB)); 79 memcpy(bcb->CDB, init_string, sizeof(init_string) - 1); 80 81 res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb, 82 US_BULK_CB_WRAP_LEN, &partial); 83 if (res) 84 return -EIO; 85 86 US_DEBUGP("Getting status packet...\n"); 87 res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, 88 US_BULK_CS_WRAP_LEN, &partial); 89 if (res) 90 return -EIO; 91 92 return 0; 93 } 94 95 /* This places the HUAWEI E220 devices in multi-port mode */ 96 int usb_stor_huawei_e220_init(struct us_data *us) 97 { 98 int result; 99 100 result = usb_stor_control_msg(us, us->send_ctrl_pipe, 101 USB_REQ_SET_FEATURE, 102 USB_TYPE_STANDARD | USB_RECIP_DEVICE, 103 0x01, 0x0, NULL, 0x0, 1000); 104 US_DEBUGP("Huawei mode set result is %d\n", result); 105 return 0; 106 } 107