2 * Driver for Option High Speed Mobile Devices.
4 * (c) 2008 Dan Williams <dcbw@redhat.com>
6 * Inspiration taken from sierra_ms.c by Kevin Lloyd <klloyd@sierrawireless.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include <linux/usb.h>
26 #include "transport.h"
27 #include "option_ms.h"
30 #define ZCD_FORCE_MODEM 0x01
31 #define ZCD_ALLOW_MS 0x02
33 static unsigned int option_zero_cd = ZCD_FORCE_MODEM;
34 module_param(option_zero_cd, uint, S_IRUGO | S_IWUSR);
35 MODULE_PARM_DESC(option_zero_cd, "ZeroCD mode (1=Force Modem (default),"
38 #define RESPONSE_LEN 1024
40 static int option_rezero(struct us_data *us)
42 const unsigned char rezero_msg[] = {
43 0x55, 0x53, 0x42, 0x43, 0x78, 0x56, 0x34, 0x12,
44 0x01, 0x00, 0x00, 0x00, 0x80, 0x00, 0x06, 0x01,
45 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
46 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
51 US_DEBUGP("Option MS: %s", "DEVICE MODE SWITCH\n");
53 buffer = kzalloc(RESPONSE_LEN, GFP_KERNEL);
55 return USB_STOR_TRANSPORT_ERROR;
57 memcpy(buffer, rezero_msg, sizeof(rezero_msg));
58 result = usb_stor_bulk_transfer_buf(us,
60 buffer, sizeof(rezero_msg), NULL);
61 if (result != USB_STOR_XFER_GOOD) {
62 result = USB_STOR_XFER_ERROR;
66 /* Some of the devices need to be asked for a response, but we don't
67 * care what that response is.
69 usb_stor_bulk_transfer_buf(us,
71 buffer, RESPONSE_LEN, NULL);
74 usb_stor_bulk_transfer_buf(us,
78 result = USB_STOR_XFER_GOOD;
85 static int option_inquiry(struct us_data *us)
87 const unsigned char inquiry_msg[] = {
88 0x55, 0x53, 0x42, 0x43, 0x12, 0x34, 0x56, 0x78,
89 0x24, 0x00, 0x00, 0x00, 0x80, 0x00, 0x06, 0x12,
90 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00, 0x00,
91 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
96 US_DEBUGP("Option MS: %s", "device inquiry for vendor name\n");
98 buffer = kzalloc(0x24, GFP_KERNEL);
100 return USB_STOR_TRANSPORT_ERROR;
102 memcpy(buffer, inquiry_msg, sizeof(inquiry_msg));
103 result = usb_stor_bulk_transfer_buf(us,
105 buffer, sizeof(inquiry_msg), NULL);
106 if (result != USB_STOR_XFER_GOOD) {
107 result = USB_STOR_XFER_ERROR;
111 result = usb_stor_bulk_transfer_buf(us,
114 if (result != USB_STOR_XFER_GOOD) {
115 result = USB_STOR_XFER_ERROR;
119 result = memcmp(buffer+8, "Option", 6);
122 usb_stor_bulk_transfer_buf(us,
132 int option_ms_init(struct us_data *us)
136 US_DEBUGP("Option MS: option_ms_init called\n");
138 /* Additional test for vendor information via INQUIRY,
139 * because some vendor/product IDs are ambiguous
141 result = option_inquiry(us);
143 US_DEBUGP("Option MS: vendor is not Option or not determinable,"
144 " no action taken\n");
147 US_DEBUGP("Option MS: this is a genuine Option device,"
150 /* Force Modem mode */
151 if (option_zero_cd == ZCD_FORCE_MODEM) {
152 US_DEBUGP("Option MS: %s", "Forcing Modem Mode\n");
153 result = option_rezero(us);
154 if (result != USB_STOR_XFER_GOOD)
155 US_DEBUGP("Option MS: Failed to switch to modem mode.\n");
157 } else if (option_zero_cd == ZCD_ALLOW_MS) {
158 /* Allow Mass Storage mode (keep CD-Rom) */
159 US_DEBUGP("Option MS: %s", "Allowing Mass Storage Mode if device"