1 /* 2 * Special Initializers for certain USB Mass Storage devices 3 * 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 #include <linux/errno.h> 40 41 #include "usb.h" 42 #include "initializers.h" 43 #include "debug.h" 44 #include "transport.h" 45 46 /* 47 * This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target 48 * mode 49 */ 50 int usb_stor_euscsi_init(struct us_data *us) 51 { 52 int result; 53 54 usb_stor_dbg(us, "Attempting to init eUSCSI bridge...\n"); 55 result = usb_stor_control_msg(us, us->send_ctrl_pipe, 56 0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR, 57 0x01, 0x0, NULL, 0x0, 5 * HZ); 58 usb_stor_dbg(us, "-- result is %d\n", result); 59 60 return 0; 61 } 62 63 /* 64 * This function is required to activate all four slots on the UCR-61S2B 65 * flash reader 66 */ 67 int usb_stor_ucr61s2b_init(struct us_data *us) 68 { 69 struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf; 70 struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf; 71 int res; 72 unsigned int partial; 73 static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS"; 74 75 usb_stor_dbg(us, "Sending UCR-61S2B initialization packet...\n"); 76 77 bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN); 78 bcb->Tag = 0; 79 bcb->DataTransferLength = cpu_to_le32(0); 80 bcb->Flags = bcb->Lun = 0; 81 bcb->Length = sizeof(init_string) - 1; 82 memset(bcb->CDB, 0, sizeof(bcb->CDB)); 83 memcpy(bcb->CDB, init_string, sizeof(init_string) - 1); 84 85 res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb, 86 US_BULK_CB_WRAP_LEN, &partial); 87 if (res) 88 return -EIO; 89 90 usb_stor_dbg(us, "Getting status packet...\n"); 91 res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, 92 US_BULK_CS_WRAP_LEN, &partial); 93 if (res) 94 return -EIO; 95 96 return 0; 97 } 98 99 /* This places the HUAWEI E220 devices in multi-port mode */ 100 int usb_stor_huawei_e220_init(struct us_data *us) 101 { 102 int result; 103 104 result = usb_stor_control_msg(us, us->send_ctrl_pipe, 105 USB_REQ_SET_FEATURE, 106 USB_TYPE_STANDARD | USB_RECIP_DEVICE, 107 0x01, 0x0, NULL, 0x0, 1 * HZ); 108 usb_stor_dbg(us, "Huawei mode set result is %d\n", result); 109 return 0; 110 } 111