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 */
47int usb_stor_euscsi_init(struct us_data *us)
48{
49	int result;
50
51	usb_stor_dbg(us, "Attempting to init eUSCSI bridge...\n");
52	result = usb_stor_control_msg(us, us->send_ctrl_pipe,
53			0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
54			0x01, 0x0, NULL, 0x0, 5 * HZ);
55	usb_stor_dbg(us, "-- result is %d\n", result);
56
57	return 0;
58}
59
60/* This function is required to activate all four slots on the UCR-61S2B
61 * flash reader */
62int usb_stor_ucr61s2b_init(struct us_data *us)
63{
64	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
65	struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
66	int res;
67	unsigned int partial;
68	static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
69
70	usb_stor_dbg(us, "Sending UCR-61S2B initialization packet...\n");
71
72	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
73	bcb->Tag = 0;
74	bcb->DataTransferLength = cpu_to_le32(0);
75	bcb->Flags = bcb->Lun = 0;
76	bcb->Length = sizeof(init_string) - 1;
77	memset(bcb->CDB, 0, sizeof(bcb->CDB));
78	memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
79
80	res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
81			US_BULK_CB_WRAP_LEN, &partial);
82	if (res)
83		return -EIO;
84
85	usb_stor_dbg(us, "Getting status packet...\n");
86	res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
87			US_BULK_CS_WRAP_LEN, &partial);
88	if (res)
89		return -EIO;
90
91	return 0;
92}
93
94/* This places the HUAWEI E220 devices in multi-port mode */
95int usb_stor_huawei_e220_init(struct us_data *us)
96{
97	int result;
98
99	result = usb_stor_control_msg(us, us->send_ctrl_pipe,
100				      USB_REQ_SET_FEATURE,
101				      USB_TYPE_STANDARD | USB_RECIP_DEVICE,
102				      0x01, 0x0, NULL, 0x0, 1 * HZ);
103	usb_stor_dbg(us, "Huawei mode set result is %d\n", result);
104	return 0;
105}
106