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 #include "initializers.h"
43 #include "debug.h"
44 #include "transport.h"
45
46 /* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
47 * mode */
48 int usb_stor_euscsi_init(struct us_data *us)
49 {
50 int result;
51
52 US_DEBUGP("Attempting to init eUSCSI bridge...\n");
53 us->iobuf[0] = 0x1;
54 result = usb_stor_control_msg(us, us->send_ctrl_pipe,
55 0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
56 0x01, 0x0, us->iobuf, 0x1, 5*HZ);
57 US_DEBUGP("-- result is %d\n", result);
58
59 return 0;
60 }
61
62 /* This function is required to activate all four slots on the UCR-61S2B
63 * flash reader */
64 int usb_stor_ucr61s2b_init(struct us_data *us)
65 {
66 struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
67 struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
68 int res, 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 res;
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
90 return (res ? -1 : 0);
91 }
92
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