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 | int usb_stor_euscsi_init(struct us_data *us) |
35 | { |
36 | int result; |
37 | |
38 | usb_stor_dbg(us, fmt: "Attempting to init eUSCSI bridge...\n" ); |
39 | result = usb_stor_control_msg(us, pipe: us->send_ctrl_pipe, |
40 | request: 0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR, |
41 | value: 0x01, index: 0x0, NULL, size: 0x0, timeout: 5 * HZ); |
42 | usb_stor_dbg(us, fmt: "-- 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 | */ |
51 | int 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, fmt: "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, pipe: us->send_bulk_pipe, buf: bcb, |
70 | US_BULK_CB_WRAP_LEN, act_len: &partial); |
71 | if (res) |
72 | return -EIO; |
73 | |
74 | usb_stor_dbg(us, fmt: "Getting status packet...\n" ); |
75 | res = usb_stor_bulk_transfer_buf(us, pipe: us->recv_bulk_pipe, buf: bcs, |
76 | US_BULK_CS_WRAP_LEN, act_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 */ |
84 | int usb_stor_huawei_e220_init(struct us_data *us) |
85 | { |
86 | int result; |
87 | |
88 | result = usb_stor_control_msg(us, pipe: us->send_ctrl_pipe, |
89 | USB_REQ_SET_FEATURE, |
90 | USB_TYPE_STANDARD | USB_RECIP_DEVICE, |
91 | value: 0x01, index: 0x0, NULL, size: 0x0, timeout: 1 * HZ); |
92 | usb_stor_dbg(us, fmt: "Huawei mode set result is %d\n" , result); |
93 | return 0; |
94 | } |
95 | |