1 /***************************************************************************
2 * Copyright (C) 2009 by Zachary T Welch <zw@superlucidity.net> *
4 * Copyright (C) 2011 by Mauro Gamba <maurillo71@gmail.com> *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the *
18 * Free Software Foundation, Inc., *
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
20 ***************************************************************************/
26 #include "libusb0_common.h"
28 static bool jtag_libusb_match(struct jtag_libusb_device
*dev
,
29 const uint16_t vids
[], const uint16_t pids
[])
31 for (unsigned i
= 0; vids
[i
]; i
++) {
32 if (dev
->descriptor
.idVendor
== vids
[i
] &&
33 dev
->descriptor
.idProduct
== pids
[i
]) {
40 /* Returns true if the string descriptor indexed by str_index in device matches string */
41 static bool string_descriptor_equal(usb_dev_handle
*device
, uint8_t str_index
,
46 char desc_string
[256+1]; /* Max size of string descriptor */
51 retval
= usb_get_string_simple(device
, str_index
,
52 desc_string
, sizeof(desc_string
)-1);
54 LOG_ERROR("usb_get_string_simple() failed with %d", retval
);
58 /* Null terminate descriptor string in case it needs to be logged. */
59 desc_string
[sizeof(desc_string
)-1] = '\0';
61 matched
= strncmp(string
, desc_string
, sizeof(desc_string
)) == 0;
63 LOG_DEBUG("Device serial number '%s' doesn't match requested serial '%s'",
68 int jtag_libusb_open(const uint16_t vids
[], const uint16_t pids
[],
70 struct jtag_libusb_device_handle
**out
)
73 struct jtag_libusb_device_handle
*libusb_handle
;
79 struct usb_bus
*busses
= usb_get_busses();
80 for (struct usb_bus
*bus
= busses
; bus
; bus
= bus
->next
) {
81 for (struct usb_device
*dev
= bus
->devices
;
82 dev
; dev
= dev
->next
) {
83 if (!jtag_libusb_match(dev
, vids
, pids
))
86 libusb_handle
= usb_open(dev
);
87 if (NULL
== libusb_handle
) {
92 /* Device must be open to use libusb_get_string_descriptor_ascii. */
94 !string_descriptor_equal(libusb_handle
, dev
->descriptor
.iSerialNumber
, serial
)) {
95 usb_close(libusb_handle
);
106 void jtag_libusb_close(jtag_libusb_device_handle
*dev
)
112 int jtag_libusb_control_transfer(jtag_libusb_device_handle
*dev
, uint8_t requestType
,
113 uint8_t request
, uint16_t wValue
, uint16_t wIndex
, char *bytes
,
114 uint16_t size
, unsigned int timeout
)
118 transferred
= usb_control_msg(dev
, requestType
, request
, wValue
, wIndex
,
119 bytes
, size
, timeout
);
127 int jtag_libusb_bulk_write(jtag_libusb_device_handle
*dev
, int ep
, char *bytes
,
128 int size
, int timeout
)
130 return usb_bulk_write(dev
, ep
, bytes
, size
, timeout
);
133 int jtag_libusb_bulk_read(jtag_libusb_device_handle
*dev
, int ep
, char *bytes
,
134 int size
, int timeout
)
136 return usb_bulk_read(dev
, ep
, bytes
, size
, timeout
);
139 int jtag_libusb_set_configuration(jtag_libusb_device_handle
*devh
,
142 struct jtag_libusb_device
*udev
= jtag_libusb_get_device(devh
);
144 return usb_set_configuration(devh
,
145 udev
->config
[configuration
].bConfigurationValue
);
148 int jtag_libusb_choose_interface(struct jtag_libusb_device_handle
*devh
,
149 unsigned int *usb_read_ep
,
150 unsigned int *usb_write_ep
,
151 int bclass
, int subclass
, int protocol
)
153 struct jtag_libusb_device
*udev
= jtag_libusb_get_device(devh
);
154 struct usb_interface
*iface
= udev
->config
->interface
;
155 struct usb_interface_descriptor
*desc
= iface
->altsetting
;
157 *usb_read_ep
= *usb_write_ep
= 0;
159 for (int i
= 0; i
< desc
->bNumEndpoints
; i
++) {
160 if ((bclass
> 0 && desc
->bInterfaceClass
!= bclass
) ||
161 (subclass
> 0 && desc
->bInterfaceSubClass
!= subclass
) ||
162 (protocol
> 0 && desc
->bInterfaceProtocol
!= protocol
))
165 uint8_t epnum
= desc
->endpoint
[i
].bEndpointAddress
;
166 bool is_input
= epnum
& 0x80;
167 LOG_DEBUG("usb ep %s %02x", is_input
? "in" : "out", epnum
);
169 *usb_read_ep
= epnum
;
171 *usb_write_ep
= epnum
;
173 if (*usb_read_ep
&& *usb_write_ep
) {
174 LOG_DEBUG("Claiming interface %d", (int)desc
->bInterfaceNumber
);
175 usb_claim_interface(devh
, (int)desc
->bInterfaceNumber
);
183 int jtag_libusb_get_pid(struct jtag_libusb_device
*dev
, uint16_t *pid
)
188 *pid
= dev
->descriptor
.idProduct
;
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