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 ***************************************************************************/
23 #include <jtag/drivers/jtag_usb_common.h>
24 #include "libusb_helper.h"
28 * comment from libusb:
29 * As per the USB 3.0 specs, the current maximum limit for the depth is 7.
31 #define MAX_USB_PORTS 7
33 static struct libusb_context
*jtag_libusb_context
; /**< Libusb context **/
34 static libusb_device
**devs
; /**< The usb device list **/
36 static int jtag_libusb_error(int err
)
41 case LIBUSB_ERROR_TIMEOUT
:
42 return ERROR_TIMEOUT_REACHED
;
44 case LIBUSB_ERROR_INVALID_PARAM
:
45 case LIBUSB_ERROR_ACCESS
:
46 case LIBUSB_ERROR_NO_DEVICE
:
47 case LIBUSB_ERROR_NOT_FOUND
:
48 case LIBUSB_ERROR_BUSY
:
49 case LIBUSB_ERROR_OVERFLOW
:
50 case LIBUSB_ERROR_PIPE
:
51 case LIBUSB_ERROR_INTERRUPTED
:
52 case LIBUSB_ERROR_NO_MEM
:
53 case LIBUSB_ERROR_NOT_SUPPORTED
:
54 case LIBUSB_ERROR_OTHER
:
61 static bool jtag_libusb_match_ids(struct libusb_device_descriptor
*dev_desc
,
62 const uint16_t vids
[], const uint16_t pids
[])
64 for (unsigned i
= 0; vids
[i
]; i
++) {
65 if (dev_desc
->idVendor
== vids
[i
] &&
66 dev_desc
->idProduct
== pids
[i
]) {
73 #ifdef HAVE_LIBUSB_GET_PORT_NUMBERS
74 static bool jtag_libusb_location_equal(libusb_device
*device
)
76 uint8_t port_path
[MAX_USB_PORTS
];
80 path_len
= libusb_get_port_numbers(device
, port_path
, MAX_USB_PORTS
);
81 if (path_len
== LIBUSB_ERROR_OVERFLOW
) {
82 LOG_WARNING("cannot determine path to usb device! (more than %i ports in path)\n",
86 dev_bus
= libusb_get_bus_number(device
);
88 return jtag_usb_location_equal(dev_bus
, port_path
, path_len
);
90 #else /* HAVE_LIBUSB_GET_PORT_NUMBERS */
91 static bool jtag_libusb_location_equal(libusb_device
*device
)
95 #endif /* HAVE_LIBUSB_GET_PORT_NUMBERS */
98 /* Returns true if the string descriptor indexed by str_index in device matches string */
99 static bool string_descriptor_equal(libusb_device_handle
*device
, uint8_t str_index
,
104 char desc_string
[256+1]; /* Max size of string descriptor */
109 retval
= libusb_get_string_descriptor_ascii(device
, str_index
,
110 (unsigned char *)desc_string
, sizeof(desc_string
)-1);
112 LOG_ERROR("libusb_get_string_descriptor_ascii() failed with %d", retval
);
116 /* Null terminate descriptor string in case it needs to be logged. */
117 desc_string
[sizeof(desc_string
)-1] = '\0';
119 matched
= strncmp(string
, desc_string
, sizeof(desc_string
)) == 0;
121 LOG_DEBUG("Device serial number '%s' doesn't match requested serial '%s'",
122 desc_string
, string
);
126 static bool jtag_libusb_match_serial(libusb_device_handle
*device
,
127 struct libusb_device_descriptor
*dev_desc
, const char *serial
,
128 adapter_get_alternate_serial_fn adapter_get_alternate_serial
)
130 if (string_descriptor_equal(device
, dev_desc
->iSerialNumber
, serial
))
133 /* check the alternate serial helper */
134 if (!adapter_get_alternate_serial
)
137 /* get the alternate serial */
138 char *alternate_serial
= adapter_get_alternate_serial(device
, dev_desc
);
140 /* check possible failures */
141 if (alternate_serial
== NULL
)
144 /* then compare and free the alternate serial */
146 if (strcmp(serial
, alternate_serial
) == 0)
149 LOG_DEBUG("Device alternate serial number '%s' doesn't match requested serial '%s'",
150 alternate_serial
, serial
);
152 free(alternate_serial
);
156 int jtag_libusb_open(const uint16_t vids
[], const uint16_t pids
[],
158 struct libusb_device_handle
**out
,
159 adapter_get_alternate_serial_fn adapter_get_alternate_serial
)
161 int cnt
, idx
, errCode
;
162 int retval
= ERROR_FAIL
;
163 bool serial_mismatch
= false;
164 struct libusb_device_handle
*libusb_handle
= NULL
;
166 if (libusb_init(&jtag_libusb_context
) < 0)
169 cnt
= libusb_get_device_list(jtag_libusb_context
, &devs
);
171 for (idx
= 0; idx
< cnt
; idx
++) {
172 struct libusb_device_descriptor dev_desc
;
174 if (libusb_get_device_descriptor(devs
[idx
], &dev_desc
) != 0)
177 if (!jtag_libusb_match_ids(&dev_desc
, vids
, pids
))
180 if (jtag_usb_get_location() && !jtag_libusb_location_equal(devs
[idx
]))
183 errCode
= libusb_open(devs
[idx
], &libusb_handle
);
186 LOG_ERROR("libusb_open() failed with %s",
187 libusb_error_name(errCode
));
191 /* Device must be open to use libusb_get_string_descriptor_ascii. */
192 if (serial
!= NULL
&&
193 !jtag_libusb_match_serial(libusb_handle
, &dev_desc
, serial
, adapter_get_alternate_serial
)) {
194 serial_mismatch
= true;
195 libusb_close(libusb_handle
);
200 *out
= libusb_handle
;
202 serial_mismatch
= false;
206 libusb_free_device_list(devs
, 1);
209 LOG_INFO("No device matches the serial string");
214 void jtag_libusb_close(struct libusb_device_handle
*dev
)
219 libusb_exit(jtag_libusb_context
);
222 int jtag_libusb_control_transfer(struct libusb_device_handle
*dev
, uint8_t requestType
,
223 uint8_t request
, uint16_t wValue
, uint16_t wIndex
, char *bytes
,
224 uint16_t size
, unsigned int timeout
)
228 transferred
= libusb_control_transfer(dev
, requestType
, request
, wValue
, wIndex
,
229 (unsigned char *)bytes
, size
, timeout
);
237 int jtag_libusb_bulk_write(struct libusb_device_handle
*dev
, int ep
, char *bytes
,
238 int size
, int timeout
, int *transferred
)
244 ret
= libusb_bulk_transfer(dev
, ep
, (unsigned char *)bytes
, size
,
245 transferred
, timeout
);
246 if (ret
!= LIBUSB_SUCCESS
) {
247 LOG_ERROR("libusb_bulk_write error: %s", libusb_error_name(ret
));
248 return jtag_libusb_error(ret
);
254 int jtag_libusb_bulk_read(struct libusb_device_handle
*dev
, int ep
, char *bytes
,
255 int size
, int timeout
, int *transferred
)
261 ret
= libusb_bulk_transfer(dev
, ep
, (unsigned char *)bytes
, size
,
262 transferred
, timeout
);
263 if (ret
!= LIBUSB_SUCCESS
) {
264 LOG_ERROR("libusb_bulk_read error: %s", libusb_error_name(ret
));
265 return jtag_libusb_error(ret
);
271 int jtag_libusb_set_configuration(struct libusb_device_handle
*devh
,
274 struct libusb_device
*udev
= libusb_get_device(devh
);
277 struct libusb_config_descriptor
*config
= NULL
;
278 int current_config
= -1;
280 retCode
= libusb_get_configuration(devh
, ¤t_config
);
284 retCode
= libusb_get_config_descriptor(udev
, configuration
, &config
);
285 if (retCode
!= 0 || config
== NULL
)
288 /* Only change the configuration if it is not already set to the
289 same one. Otherwise this issues a lightweight reset and hangs
290 LPC-Link2 with JLink firmware. */
291 if (current_config
!= config
->bConfigurationValue
)
292 retCode
= libusb_set_configuration(devh
, config
->bConfigurationValue
);
294 libusb_free_config_descriptor(config
);
299 int jtag_libusb_choose_interface(struct libusb_device_handle
*devh
,
300 unsigned int *usb_read_ep
,
301 unsigned int *usb_write_ep
,
302 int bclass
, int subclass
, int protocol
, int trans_type
)
304 struct libusb_device
*udev
= libusb_get_device(devh
);
305 const struct libusb_interface
*inter
;
306 const struct libusb_interface_descriptor
*interdesc
;
307 const struct libusb_endpoint_descriptor
*epdesc
;
308 struct libusb_config_descriptor
*config
;
310 *usb_read_ep
= *usb_write_ep
= 0;
312 libusb_get_config_descriptor(udev
, 0, &config
);
313 for (int i
= 0; i
< (int)config
->bNumInterfaces
; i
++) {
314 inter
= &config
->interface
[i
];
316 interdesc
= &inter
->altsetting
[0];
318 k
< (int)interdesc
->bNumEndpoints
; k
++) {
319 if ((bclass
> 0 && interdesc
->bInterfaceClass
!= bclass
) ||
320 (subclass
> 0 && interdesc
->bInterfaceSubClass
!= subclass
) ||
321 (protocol
> 0 && interdesc
->bInterfaceProtocol
!= protocol
))
324 epdesc
= &interdesc
->endpoint
[k
];
325 if (trans_type
> 0 && (epdesc
->bmAttributes
& 0x3) != trans_type
)
328 uint8_t epnum
= epdesc
->bEndpointAddress
;
329 bool is_input
= epnum
& 0x80;
330 LOG_DEBUG("usb ep %s %02x",
331 is_input
? "in" : "out", epnum
);
334 *usb_read_ep
= epnum
;
336 *usb_write_ep
= epnum
;
338 if (*usb_read_ep
&& *usb_write_ep
) {
339 LOG_DEBUG("Claiming interface %d", (int)interdesc
->bInterfaceNumber
);
340 libusb_claim_interface(devh
, (int)interdesc
->bInterfaceNumber
);
341 libusb_free_config_descriptor(config
);
346 libusb_free_config_descriptor(config
);
351 int jtag_libusb_get_pid(struct libusb_device
*dev
, uint16_t *pid
)
353 struct libusb_device_descriptor dev_desc
;
355 if (libusb_get_device_descriptor(dev
, &dev_desc
) == 0) {
356 *pid
= dev_desc
.idProduct
;
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