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 #define RIO_MSC 0x08 49 #define RIOP_INIT "RIOP\x00\x01\x08" 50 #define RIOP_INIT_LEN 7 51 #define RIO_SEND_LEN 40 52 #define RIO_RECV_LEN 0x200 53 54 /* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target 55 * mode */ 56 int usb_stor_euscsi_init(struct us_data *us) 57 { 58 int result; 59 60 US_DEBUGP("Attempting to init eUSCSI bridge...\n"); 61 us->iobuf[0] = 0x1; 62 result = usb_stor_control_msg(us, us->send_ctrl_pipe, 63 0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR, 64 0x01, 0x0, us->iobuf, 0x1, 5*HZ); 65 US_DEBUGP("-- result is %d\n", result); 66 67 return 0; 68 } 69 70 /* This function is required to activate all four slots on the UCR-61S2B 71 * flash reader */ 72 int usb_stor_ucr61s2b_init(struct us_data *us) 73 { 74 struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf; 75 struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf; 76 int res, partial; 77 static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS"; 78 79 US_DEBUGP("Sending UCR-61S2B initialization packet...\n"); 80 81 bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN); 82 bcb->Tag = 0; 83 bcb->DataTransferLength = cpu_to_le32(0); 84 bcb->Flags = bcb->Lun = 0; 85 bcb->Length = sizeof(init_string) - 1; 86 memset(bcb->CDB, 0, sizeof(bcb->CDB)); 87 memcpy(bcb->CDB, init_string, sizeof(init_string) - 1); 88 89 res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb, 90 US_BULK_CB_WRAP_LEN, &partial); 91 if(res) 92 return res; 93 94 US_DEBUGP("Getting status packet...\n"); 95 res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, 96 US_BULK_CS_WRAP_LEN, &partial); 97 98 return (res ? -1 : 0); 99 } 100 101 /* Place the Rio Karma into mass storage mode. 102 * 103 * The initialization begins by sending 40 bytes starting 104 * RIOP\x00\x01\x08\x00, which the device will ack with a 512-byte 105 * packet with the high four bits set and everything else null. 106 * 107 * Next, we send RIOP\x80\x00\x08\x00. Each time, a 512 byte response 108 * must be read, but we must loop until byte 5 in the response is 0x08, 109 * indicating success. */ 110 int rio_karma_init(struct us_data *us) 111 { 112 int result, partial; 113 char *recv; 114 unsigned long timeout; 115 116 // us->iobuf is big enough to hold cmd but not receive 117 if (!(recv = kmalloc(RIO_RECV_LEN, GFP_KERNEL))) 118 goto die_nomem; 119 120 US_DEBUGP("Initializing Karma...\n"); 121 122 memset(us->iobuf, 0, RIO_SEND_LEN); 123 memcpy(us->iobuf, RIOP_INIT, RIOP_INIT_LEN); 124 125 result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, 126 us->iobuf, RIO_SEND_LEN, &partial); 127 if (result != USB_STOR_XFER_GOOD) 128 goto die; 129 130 result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, 131 recv, RIO_RECV_LEN, &partial); 132 if (result != USB_STOR_XFER_GOOD) 133 goto die; 134 135 us->iobuf[4] = 0x80; 136 us->iobuf[5] = 0; 137 timeout = jiffies + msecs_to_jiffies(3000); 138 for (;;) { 139 US_DEBUGP("Sending init command\n"); 140 result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, 141 us->iobuf, RIO_SEND_LEN, &partial); 142 if (result != USB_STOR_XFER_GOOD) 143 goto die; 144 145 result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, 146 recv, RIO_RECV_LEN, &partial); 147 if (result != USB_STOR_XFER_GOOD) 148 goto die; 149 150 if (recv[5] == RIO_MSC) 151 break; 152 if (time_after(jiffies, timeout)) 153 goto die; 154 msleep(10); 155 } 156 US_DEBUGP("Karma initialized.\n"); 157 kfree(recv); 158 return 0; 159 160 die: 161 kfree(recv); 162 die_nomem: 163 US_DEBUGP("Could not initialize karma.\n"); 164 return USB_STOR_TRANSPORT_FAILED; 165 } 166 167