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 "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 */
usb_stor_euscsi_init(struct us_data * us)46 int 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
usb_stor_ucr61s2b_init(struct us_data * us)64 int 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