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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 : : */
34 : 0 : int usb_stor_euscsi_init(struct us_data *us)
35 : : {
36 : 0 : int result;
37 : :
38 : 0 : usb_stor_dbg(us, "Attempting to init eUSCSI bridge...\n");
39 : 0 : 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 : 0 : usb_stor_dbg(us, "-- result is %d\n", result);
43 : :
44 : 0 : return 0;
45 : : }
46 : :
47 : : /*
48 : : * This function is required to activate all four slots on the UCR-61S2B
49 : : * flash reader
50 : : */
51 : 0 : int usb_stor_ucr61s2b_init(struct us_data *us)
52 : : {
53 : 0 : struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
54 : 0 : struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
55 : 0 : int res;
56 : 0 : unsigned int partial;
57 : 0 : static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
58 : :
59 : 0 : usb_stor_dbg(us, "Sending UCR-61S2B initialization packet...\n");
60 : :
61 : 0 : bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
62 : 0 : bcb->Tag = 0;
63 : 0 : bcb->DataTransferLength = cpu_to_le32(0);
64 : 0 : bcb->Flags = bcb->Lun = 0;
65 : 0 : bcb->Length = sizeof(init_string) - 1;
66 : 0 : memset(bcb->CDB, 0, sizeof(bcb->CDB));
67 : 0 : memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
68 : :
69 : 0 : res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
70 : : US_BULK_CB_WRAP_LEN, &partial);
71 [ # # ]: 0 : if (res)
72 : : return -EIO;
73 : :
74 : 0 : usb_stor_dbg(us, "Getting status packet...\n");
75 : 0 : res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
76 : : US_BULK_CS_WRAP_LEN, &partial);
77 [ # # ]: 0 : if (res)
78 : 0 : return -EIO;
79 : :
80 : : return 0;
81 : : }
82 : :
83 : : /* This places the HUAWEI E220 devices in multi-port mode */
84 : 0 : int usb_stor_huawei_e220_init(struct us_data *us)
85 : : {
86 : 0 : int result;
87 : :
88 : 0 : 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 : 0 : usb_stor_dbg(us, "Huawei mode set result is %d\n", result);
93 : 0 : return 0;
94 : : }
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