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 */
usb_stor_euscsi_init(struct us_data * us)47 int usb_stor_euscsi_init(struct us_data *us)
48 {
49 int result;
50
51 US_DEBUGP("Attempting to init eUSCSI bridge...\n");
52 us->iobuf[0] = 0x1;
53 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 return 0;
59 }
60
61 /* This function is required to activate all four slots on the UCR-61S2B
62 * flash reader */
usb_stor_ucr61s2b_init(struct us_data * us)63 int usb_stor_ucr61s2b_init(struct us_data *us)
64 {
65 struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
66 struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
67 int res;
68 unsigned int 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 -EIO;
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 if (res)
90 return -EIO;
91
92 return 0;
93 }
94
95 /* This places the HUAWEI E220 devices in multi-port mode */
usb_stor_huawei_e220_init(struct us_data * us)96 int usb_stor_huawei_e220_init(struct us_data *us)
97 {
98 int result;
99
100 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 return 0;
106 }
107