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, see <http://www.gnu.org/licenses/>. *
18 ***************************************************************************/
24 #include "libusb0_common.h"
26 static bool jtag_libusb_match(struct jtag_libusb_device
*dev
,
27 const uint16_t vids
[], const uint16_t pids
[])
29 for (unsigned i
= 0; vids
[i
]; i
++) {
30 if (dev
->descriptor
.idVendor
== vids
[i
] &&
31 dev
->descriptor
.idProduct
== pids
[i
]) {
38 /* Returns true if the string descriptor indexed by str_index in device matches string */
39 static bool string_descriptor_equal(usb_dev_handle
*device
, uint8_t str_index
,
44 char desc_string
[256+1]; /* Max size of string descriptor */
49 retval
= usb_get_string_simple(device
, str_index
,
50 desc_string
, sizeof(desc_string
)-1);
52 LOG_ERROR("usb_get_string_simple() failed with %d", retval
);
56 /* Null terminate descriptor string in case it needs to be logged. */
57 desc_string
[sizeof(desc_string
)-1] = '\0';
59 matched
= strncmp(string
, desc_string
, sizeof(desc_string
)) == 0;
61 LOG_DEBUG("Device serial number '%s' doesn't match requested serial '%s'",
66 int jtag_libusb_open(const uint16_t vids
[], const uint16_t pids
[],
68 struct jtag_libusb_device_handle
**out
)
70 int retval
= ERROR_FAIL
;
71 bool serial_mismatch
= false;
72 struct jtag_libusb_device_handle
*libusb_handle
;
78 struct usb_bus
*busses
= usb_get_busses();
79 for (struct usb_bus
*bus
= busses
; bus
; bus
= bus
->next
) {
80 for (struct usb_device
*dev
= bus
->devices
;
81 dev
; dev
= dev
->next
) {
82 if (!jtag_libusb_match(dev
, vids
, pids
))
85 libusb_handle
= usb_open(dev
);
86 if (NULL
== libusb_handle
) {
87 LOG_ERROR("usb_open() failed with %s", usb_strerror());
91 /* Device must be open to use libusb_get_string_descriptor_ascii. */
93 !string_descriptor_equal(libusb_handle
, dev
->descriptor
.iSerialNumber
, serial
)) {
94 serial_mismatch
= true;
95 usb_close(libusb_handle
);
100 serial_mismatch
= false;
106 LOG_INFO("No device matches the serial string");
111 void jtag_libusb_close(jtag_libusb_device_handle
*dev
)
117 int jtag_libusb_control_transfer(jtag_libusb_device_handle
*dev
, uint8_t requestType
,
118 uint8_t request
, uint16_t wValue
, uint16_t wIndex
, char *bytes
,
119 uint16_t size
, unsigned int timeout
)
123 transferred
= usb_control_msg(dev
, requestType
, request
, wValue
, wIndex
,
124 bytes
, size
, timeout
);
132 int jtag_libusb_bulk_write(jtag_libusb_device_handle
*dev
, int ep
, char *bytes
,
133 int size
, int timeout
)
135 return usb_bulk_write(dev
, ep
, bytes
, size
, timeout
);
138 int jtag_libusb_bulk_read(jtag_libusb_device_handle
*dev
, int ep
, char *bytes
,
139 int size
, int timeout
)
141 return usb_bulk_read(dev
, ep
, bytes
, size
, timeout
);
144 int jtag_libusb_set_configuration(jtag_libusb_device_handle
*devh
,
147 struct jtag_libusb_device
*udev
= jtag_libusb_get_device(devh
);
149 return usb_set_configuration(devh
,
150 udev
->config
[configuration
].bConfigurationValue
);
153 int jtag_libusb_choose_interface(struct jtag_libusb_device_handle
*devh
,
154 unsigned int *usb_read_ep
,
155 unsigned int *usb_write_ep
,
156 int bclass
, int subclass
, int protocol
, int trans_type
)
158 struct jtag_libusb_device
*udev
= jtag_libusb_get_device(devh
);
159 struct usb_interface
*iface
= udev
->config
->interface
;
160 struct usb_interface_descriptor
*desc
= iface
->altsetting
;
162 *usb_read_ep
= *usb_write_ep
= 0;
164 for (int i
= 0; i
< desc
->bNumEndpoints
; i
++) {
165 if ((bclass
> 0 && desc
->bInterfaceClass
!= bclass
) ||
166 (subclass
> 0 && desc
->bInterfaceSubClass
!= subclass
) ||
167 (protocol
> 0 && desc
->bInterfaceProtocol
!= protocol
) ||
168 (trans_type
> 0 && (desc
->endpoint
[i
].bmAttributes
& 0x3) != trans_type
))
171 uint8_t epnum
= desc
->endpoint
[i
].bEndpointAddress
;
172 bool is_input
= epnum
& 0x80;
173 LOG_DEBUG("usb ep %s %02x", is_input
? "in" : "out", epnum
);
175 *usb_read_ep
= epnum
;
177 *usb_write_ep
= epnum
;
179 if (*usb_read_ep
&& *usb_write_ep
) {
180 LOG_DEBUG("Claiming interface %d", (int)desc
->bInterfaceNumber
);
181 usb_claim_interface(devh
, (int)desc
->bInterfaceNumber
);
189 int jtag_libusb_get_pid(struct jtag_libusb_device
*dev
, uint16_t *pid
)
194 *pid
= dev
->descriptor
.idProduct
;
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