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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Special Initializers for certain USB Mass Storage devices
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
23#include <linux/errno.h>
24
25#include "usb.h"
26#include "initializers.h"
27#include "debug.h"
28#include "transport.h"
29
30/*
31 * This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
32 * mode
33 */
34int usb_stor_euscsi_init(struct us_data *us)
35{
36 int result;
37
38 usb_stor_dbg(us, "Attempting to init eUSCSI bridge...\n");
39 result = usb_stor_control_msg(us, us->send_ctrl_pipe,
40 0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
41 0x01, 0x0, NULL, 0x0, 5 * HZ);
42 usb_stor_dbg(us, "-- result is %d\n", result);
43
44 return 0;
45}
46
47/*
48 * This function is required to activate all four slots on the UCR-61S2B
49 * flash reader
50 */
51int usb_stor_ucr61s2b_init(struct us_data *us)
52{
53 struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
54 struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
55 int res;
56 unsigned int partial;
57 static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
58
59 usb_stor_dbg(us, "Sending UCR-61S2B initialization packet...\n");
60
61 bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
62 bcb->Tag = 0;
63 bcb->DataTransferLength = cpu_to_le32(0);
64 bcb->Flags = bcb->Lun = 0;
65 bcb->Length = sizeof(init_string) - 1;
66 memset(bcb->CDB, 0, sizeof(bcb->CDB));
67 memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
68
69 res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
70 US_BULK_CB_WRAP_LEN, &partial);
71 if (res)
72 return -EIO;
73
74 usb_stor_dbg(us, "Getting status packet...\n");
75 res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
76 US_BULK_CS_WRAP_LEN, &partial);
77 if (res)
78 return -EIO;
79
80 return 0;
81}
82
83/* This places the HUAWEI E220 devices in multi-port mode */
84int usb_stor_huawei_e220_init(struct us_data *us)
85{
86 int result;
87
88 result = usb_stor_control_msg(us, us->send_ctrl_pipe,
89 USB_REQ_SET_FEATURE,
90 USB_TYPE_STANDARD | USB_RECIP_DEVICE,
91 0x01, 0x0, NULL, 0x0, 1 * HZ);
92 usb_stor_dbg(us, "Huawei mode set result is %d\n", result);
93 return 0;
94}
1/*
2 * Special Initializers for certain USB Mass Storage devices
3 *
4 * Current development and maintenance by:
5 * (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
6 *
7 * This driver is based on the 'USB Mass Storage Class' document. This
8 * describes in detail the protocol used to communicate with such
9 * devices. Clearly, the designers had SCSI and ATAPI commands in
10 * mind when they created this document. The commands are all very
11 * similar to commands in the SCSI-II and ATAPI specifications.
12 *
13 * It is important to note that in a number of cases this class
14 * exhibits class-specific exemptions from the USB specification.
15 * Notably the usage of NAK, STALL and ACK differs from the norm, in
16 * that they are used to communicate wait, failed and OK on commands.
17 *
18 * Also, for certain devices, the interrupt endpoint is used to convey
19 * status of a command.
20 *
21 * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
22 * information about this driver.
23 *
24 * This program is free software; you can redistribute it and/or modify it
25 * under the terms of the GNU General Public License as published by the
26 * Free Software Foundation; either version 2, or (at your option) any
27 * later version.
28 *
29 * This program is distributed in the hope that it will be useful, but
30 * WITHOUT ANY WARRANTY; without even the implied warranty of
31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
32 * General Public License for more details.
33 *
34 * You should have received a copy of the GNU General Public License along
35 * with this program; if not, write to the Free Software Foundation, Inc.,
36 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 */
38
39#include <linux/errno.h>
40
41#include "usb.h"
42#include "initializers.h"
43#include "debug.h"
44#include "transport.h"
45
46/*
47 * This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
48 * mode
49 */
50int usb_stor_euscsi_init(struct us_data *us)
51{
52 int result;
53
54 usb_stor_dbg(us, "Attempting to init eUSCSI bridge...\n");
55 result = usb_stor_control_msg(us, us->send_ctrl_pipe,
56 0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
57 0x01, 0x0, NULL, 0x0, 5 * HZ);
58 usb_stor_dbg(us, "-- result is %d\n", result);
59
60 return 0;
61}
62
63/*
64 * This function is required to activate all four slots on the UCR-61S2B
65 * flash reader
66 */
67int usb_stor_ucr61s2b_init(struct us_data *us)
68{
69 struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
70 struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
71 int res;
72 unsigned int partial;
73 static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
74
75 usb_stor_dbg(us, "Sending UCR-61S2B initialization packet...\n");
76
77 bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
78 bcb->Tag = 0;
79 bcb->DataTransferLength = cpu_to_le32(0);
80 bcb->Flags = bcb->Lun = 0;
81 bcb->Length = sizeof(init_string) - 1;
82 memset(bcb->CDB, 0, sizeof(bcb->CDB));
83 memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
84
85 res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
86 US_BULK_CB_WRAP_LEN, &partial);
87 if (res)
88 return -EIO;
89
90 usb_stor_dbg(us, "Getting status packet...\n");
91 res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
92 US_BULK_CS_WRAP_LEN, &partial);
93 if (res)
94 return -EIO;
95
96 return 0;
97}
98
99/* This places the HUAWEI E220 devices in multi-port mode */
100int usb_stor_huawei_e220_init(struct us_data *us)
101{
102 int result;
103
104 result = usb_stor_control_msg(us, us->send_ctrl_pipe,
105 USB_REQ_SET_FEATURE,
106 USB_TYPE_STANDARD | USB_RECIP_DEVICE,
107 0x01, 0x0, NULL, 0x0, 1 * HZ);
108 usb_stor_dbg(us, "Huawei mode set result is %d\n", result);
109 return 0;
110}