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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include <stdlib.h> | |
23 | #include <glib.h> | |
24 | #include <libusb.h> | |
25 | #include "libsigrok.h" | |
26 | #include "libsigrok-internal.h" | |
27 | ||
28 | /* SR_HWCAP_CONN takes one of these: */ | |
29 | #define CONN_USB_VIDPID "^([0-9a-z]{1,4})\\.([0-9a-z]{1,4})$" | |
30 | #define CONN_USB_BUSADDR "^(\\d+)\\.(\\d+)$" | |
31 | ||
32 | /* Message logging helpers with driver-specific prefix string. */ | |
33 | #define DRIVER_LOG_DOMAIN "usb: " | |
34 | #define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args) | |
35 | #define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args) | |
36 | #define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args) | |
37 | #define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args) | |
38 | #define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args) | |
39 | #define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args) | |
40 | ||
41 | /** | |
42 | * Find USB devices according to a connection string. | |
43 | * | |
44 | * @param usb_ctx libusb context to use while scanning. | |
45 | * @param conn Connection string specifying the device(s) to match. This | |
46 | * can be of the form "<bus>.<address>", or "<vendorid>.<productid>". | |
47 | * | |
48 | * @return A GSList of struct sr_usb_dev_inst, with bus and address fields | |
49 | * matching the device that matched the connection string. The GSList and | |
50 | * its contents must be freed by the caller. | |
51 | */ | |
52 | SR_PRIV GSList *sr_usb_find(libusb_context *usb_ctx, const char *conn) | |
53 | { | |
54 | struct sr_usb_dev_inst *usb; | |
55 | struct libusb_device **devlist; | |
56 | struct libusb_device_descriptor des; | |
57 | GSList *devices; | |
58 | GRegex *reg; | |
59 | GMatchInfo *match; | |
60 | int vid, pid, bus, addr, b, a, ret, i; | |
61 | char *mstr; | |
62 | ||
63 | vid = pid = bus = addr = 0; | |
64 | reg = g_regex_new(CONN_USB_VIDPID, 0, 0, NULL); | |
65 | if (g_regex_match(reg, conn, 0, &match)) { | |
66 | if ((mstr = g_match_info_fetch(match, 1))) | |
67 | vid = strtoul(mstr, NULL, 16); | |
68 | g_free(mstr); | |
69 | ||
70 | if ((mstr = g_match_info_fetch(match, 2))) | |
71 | pid = strtoul(mstr, NULL, 16); | |
72 | g_free(mstr); | |
73 | sr_dbg("Trying to find USB device with VID:PID = %04x:%04x.", | |
74 | vid, pid); | |
75 | } else { | |
76 | g_match_info_unref(match); | |
77 | g_regex_unref(reg); | |
78 | reg = g_regex_new(CONN_USB_BUSADDR, 0, 0, NULL); | |
79 | if (g_regex_match(reg, conn, 0, &match)) { | |
80 | if ((mstr = g_match_info_fetch(match, 1))) | |
81 | bus = strtoul(mstr, NULL, 16); | |
82 | g_free(mstr); | |
83 | ||
84 | if ((mstr = g_match_info_fetch(match, 2))) | |
85 | addr = strtoul(mstr, NULL, 16); | |
86 | g_free(mstr); | |
87 | sr_dbg("Trying to find USB device with bus.address = " | |
88 | "%d.%d.", bus, addr); | |
89 | } | |
90 | } | |
91 | g_match_info_unref(match); | |
92 | g_regex_unref(reg); | |
93 | ||
94 | if (vid + pid + bus + addr == 0) { | |
95 | sr_err("Neither VID:PID nor bus.address was specified."); | |
96 | return NULL; | |
97 | } | |
98 | ||
99 | if (bus > 64) { | |
100 | sr_err("Invalid bus specified: %d.", bus); | |
101 | return NULL; | |
102 | } | |
103 | ||
104 | if (addr > 127) { | |
105 | sr_err("Invalid address specified: %d.", addr); | |
106 | return NULL; | |
107 | } | |
108 | ||
109 | /* Looks like a valid USB device specification, but is it connected? */ | |
110 | devices = NULL; | |
111 | libusb_get_device_list(usb_ctx, &devlist); | |
112 | for (i = 0; devlist[i]; i++) { | |
113 | if ((ret = libusb_get_device_descriptor(devlist[i], &des))) { | |
114 | sr_err("Failed to get device descriptor: %s.", | |
115 | libusb_error_name(ret)); | |
116 | continue; | |
117 | } | |
118 | ||
119 | if (vid + pid && (des.idVendor != vid || des.idProduct != pid)) | |
120 | continue; | |
121 | ||
122 | b = libusb_get_bus_number(devlist[i]); | |
123 | a = libusb_get_device_address(devlist[i]); | |
124 | if (bus + addr && (b != bus || a != addr)) | |
125 | continue; | |
126 | ||
127 | sr_dbg("Found USB device (VID:PID = %04x:%04x, bus.address = " | |
128 | "%d.%d).", des.idVendor, des.idProduct, b, a); | |
129 | ||
130 | usb = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]), | |
131 | libusb_get_device_address(devlist[i]), NULL); | |
132 | devices = g_slist_append(devices, usb); | |
133 | } | |
134 | libusb_free_device_list(devlist, 1); | |
135 | ||
136 | sr_dbg("Found %d device(s).", g_slist_length(devices)); | |
137 | ||
138 | return devices; | |
139 | } | |
140 | ||
141 | SR_PRIV int sr_usb_open(libusb_context *usb_ctx, struct sr_usb_dev_inst *usb) | |
142 | { | |
143 | struct libusb_device **devlist; | |
144 | struct libusb_device_descriptor des; | |
145 | int ret, r, cnt, i, a, b; | |
146 | ||
147 | sr_dbg("Trying to open USB device %d.%d.", usb->bus, usb->address); | |
148 | ||
149 | if ((cnt = libusb_get_device_list(usb_ctx, &devlist)) < 0) { | |
150 | sr_err("Failed to retrieve device list: %s.", | |
151 | libusb_error_name(cnt)); | |
152 | return SR_ERR; | |
153 | } | |
154 | ||
155 | ret = SR_ERR; | |
156 | for (i = 0; i < cnt; i++) { | |
157 | if ((r = libusb_get_device_descriptor(devlist[i], &des)) < 0) { | |
158 | sr_err("Failed to get device descriptor: %s.", | |
159 | libusb_error_name(r)); | |
160 | continue; | |
161 | } | |
162 | ||
163 | b = libusb_get_bus_number(devlist[i]); | |
164 | a = libusb_get_device_address(devlist[i]); | |
165 | if (b != usb->bus || a != usb->address) | |
166 | continue; | |
167 | ||
168 | if ((r = libusb_open(devlist[i], &usb->devhdl)) < 0) { | |
169 | sr_err("Failed to open device: %s.", | |
170 | libusb_error_name(r)); | |
171 | break; | |
172 | } | |
173 | ||
174 | sr_dbg("Opened USB device (VID:PID = %04x:%04x, bus.address = " | |
175 | "%d.%d).", des.idVendor, des.idProduct, b, a); | |
176 | ||
177 | ret = SR_OK; | |
178 | break; | |
179 | } | |
180 | ||
181 | libusb_free_device_list(devlist, 1); | |
182 | ||
183 | return ret; | |
184 | } |