Line data Source code
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 1 : int result;
50 :
51 : US_DEBUGP("Attempting to init eUSCSI bridge...\n");
52 1 : us->iobuf[0] = 0x1;
53 3 : 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 1 : 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 3 : struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
66 3 : struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
67 1 : int res;
68 1 : unsigned int partial;
69 13 : static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
70 2 :
71 2 : US_DEBUGP("Sending UCR-61S2B initialization packet...\n");
72 :
73 1 : bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
74 1 : bcb->Tag = 0;
75 1 : bcb->DataTransferLength = cpu_to_le32(0);
76 3 : bcb->Flags = bcb->Lun = 0;
77 1 : bcb->Length = sizeof(init_string) - 1;
78 1 : memset(bcb->CDB, 0, sizeof(bcb->CDB));
79 1 : memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
80 :
81 2 : res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
82 : US_BULK_CB_WRAP_LEN, &partial);
83 2 : if (res)
84 1 : return -EIO;
85 :
86 : US_DEBUGP("Getting status packet...\n");
87 2 : res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
88 : US_BULK_CS_WRAP_LEN, &partial);
89 2 : if (res)
90 1 : return -EIO;
91 :
92 1 : 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 1 : int result;
99 :
100 2 : 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 1 : return 0;
106 : }
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