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a1bb33af | 1 | /* |
fed16f06 UH |
2 | * This file is part of the sigrok project. |
3 | * | |
4 | * Copyright (C) 2010 Sven Peter <sven@fail0verflow.com> | |
5 | * Copyright (C) 2010 Haxx Enterprises <bushing@gmail.com> | |
6 | * All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or | |
9 | * without modification, are permitted provided that the following | |
10 | * conditions are met: | |
11 | * | |
12 | * * Redistributions of source code must retain the above copyright notice, | |
13 | * this list of conditions and the following disclaimer. | |
14 | * | |
15 | * * Redistributions in binary form must reproduce the above copyright notice, | |
16 | * this list of conditions and the following disclaimer in the documentation | |
17 | * and/or other materials provided with the distribution. | |
18 | * | |
19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
20 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
23 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
29 | * THE POSSIBILITY OF SUCH DAMAGE. | |
30 | */ | |
31 | ||
a1bb33af UH |
32 | #include <libusb.h> |
33 | #include <stdio.h> | |
cc8a7d25 | 34 | #include <sigrok-internal.h> |
a1bb33af UH |
35 | #include "gl_usb.h" |
36 | ||
fed16f06 UH |
37 | #define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN | \ |
38 | LIBUSB_RECIPIENT_INTERFACE) | |
39 | #define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT | \ | |
40 | LIBUSB_RECIPIENT_INTERFACE) | |
41 | ||
42 | const int PACKET_CTRL_LEN = 2; | |
43 | const int PACKET_INT_LEN = 2; | |
44 | const int PACKET_BULK_LEN = 64; | |
45 | const int INTERFACE = 0; | |
46 | const int ENDPOINT_INT_IN = 0x81; /* Endpoint 0x81 address for IN */ | |
47 | const int ENDPOINT_INT_OUT = 0x01; /* Endpoint 1 address for OUT */ | |
48 | const int ENDPOINT_BULK_IN = 0x81; /* Endpoint 0x81 address for IN */ | |
49 | const int ENDPOINT_BULK_OUT = 0x02; /* Endpoint 1 address for OUT */ | |
50 | const int TIMEOUT = 5000; /* Timeout in ms */ | |
a1bb33af UH |
51 | |
52 | enum { | |
53 | REQ_READBULK = 0x82, | |
54 | REQ_WRITEADDR, | |
55 | REQ_READDATA, | |
56 | REQ_WRITEDATA, | |
57 | }; | |
58 | ||
59 | static struct libusb_device_handle *g_devh = NULL; | |
60 | ||
61 | int gl_write_address(libusb_device_handle *devh, unsigned int address) | |
62 | { | |
fed16f06 UH |
63 | unsigned char packet[8] = { address & 0xFF }; |
64 | int ret; | |
65 | ||
66 | ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEADDR, | |
67 | 0, packet, 1, TIMEOUT); | |
68 | if (ret != 1) | |
a562c3a2 | 69 | sr_err("%s: libusb_control_transfer returned %d\n", |
6bb5c5fa | 70 | __func__, ret); |
fed16f06 | 71 | return ret; |
a1bb33af UH |
72 | } |
73 | ||
74 | int gl_write_data(libusb_device_handle *devh, unsigned int val) | |
75 | { | |
fed16f06 UH |
76 | unsigned char packet[8] = { val & 0xFF }; |
77 | int ret; | |
78 | ||
79 | ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEDATA, | |
80 | 0, packet, 1, TIMEOUT); | |
81 | if (ret != 1) | |
a562c3a2 | 82 | sr_err("%s: libusb_control_transfer returned %d\n", |
6bb5c5fa | 83 | __func__, ret); |
fed16f06 | 84 | return ret; |
a1bb33af UH |
85 | } |
86 | ||
87 | int gl_read_data(libusb_device_handle *devh) | |
88 | { | |
fed16f06 UH |
89 | unsigned char packet[8] = { 0 }; |
90 | int ret; | |
91 | ||
92 | ret = libusb_control_transfer(devh, CTRL_IN, 0xc, REQ_READDATA, | |
93 | 0, packet, 1, TIMEOUT); | |
94 | if (ret != 1) | |
a562c3a2 | 95 | sr_err("%s: libusb_control_transfer returned %d, val=%hhx\n", |
6bb5c5fa | 96 | __func__, ret, packet[0]); |
fed16f06 | 97 | return (ret == 1) ? packet[0] : ret; |
a1bb33af UH |
98 | } |
99 | ||
100 | int gl_read_bulk(libusb_device_handle *devh, void *buffer, unsigned int size) | |
101 | { | |
fed16f06 UH |
102 | unsigned char packet[8] = |
103 | { 0, 0, 0, 0, size & 0xff, (size & 0xff00) >> 8, | |
104 | (size & 0xff0000) >> 16, (size & 0xff000000) >> 24 }; | |
105 | int ret, transferred = 0; | |
106 | ||
107 | ret = libusb_control_transfer(devh, CTRL_OUT, 0x4, REQ_READBULK, | |
108 | 0, packet, 8, TIMEOUT); | |
109 | if (ret != 8) | |
a562c3a2 | 110 | sr_err("%s: libusb_control_transfer returned %d\n", |
6bb5c5fa | 111 | __func__, ret); |
fed16f06 UH |
112 | |
113 | ret = libusb_bulk_transfer(devh, ENDPOINT_BULK_IN, buffer, size, | |
114 | &transferred, TIMEOUT); | |
115 | if (ret < 0) | |
a562c3a2 | 116 | sr_err("Bulk read error %d\n", ret); |
a1bb33af UH |
117 | return transferred; |
118 | } | |
119 | ||
fed16f06 UH |
120 | int gl_reg_write(libusb_device_handle *devh, unsigned int reg, |
121 | unsigned int val) | |
a1bb33af | 122 | { |
fed16f06 UH |
123 | int ret; |
124 | ||
125 | ret = gl_write_address(devh, reg); | |
126 | if (ret < 0) | |
127 | return ret; | |
128 | ret = gl_write_data(devh, val); | |
129 | return ret; | |
a1bb33af UH |
130 | } |
131 | ||
132 | int gl_reg_read(libusb_device_handle *devh, unsigned int reg) | |
133 | { | |
fed16f06 UH |
134 | int ret; |
135 | ||
136 | ret = gl_write_address(devh, reg); | |
137 | if (ret < 0) | |
138 | return ret; | |
139 | ret = gl_read_data(devh); | |
140 | return ret; | |
a1bb33af UH |
141 | } |
142 | ||
143 | int gl_open(int vid) | |
144 | { | |
fed16f06 UH |
145 | int ret; |
146 | struct libusb_device **devs; | |
147 | struct libusb_device *dev; | |
148 | size_t i = 0; | |
149 | struct libusb_device_descriptor desc; | |
a1bb33af | 150 | |
fed16f06 UH |
151 | ret = libusb_init(NULL); |
152 | if (ret < 0) | |
a1bb33af UH |
153 | return GL_ELIBUSB; |
154 | ||
a1bb33af | 155 | if (libusb_get_device_list(NULL, &devs) < 0) { |
fed16f06 | 156 | ret = GL_EOPEN; |
a1bb33af UH |
157 | goto gl_open_error; |
158 | } | |
159 | ||
160 | while ((dev = devs[i++]) != NULL) { | |
a1bb33af UH |
161 | if (libusb_get_device_descriptor(dev, &desc) < 0) |
162 | break; | |
163 | ||
164 | if (desc.idVendor == vid) { | |
165 | if (libusb_open(dev, &g_devh) < 0) | |
166 | g_devh = NULL; | |
167 | break; | |
168 | } | |
169 | } | |
170 | ||
171 | libusb_free_device_list(devs, 1); | |
172 | ||
173 | if (!g_devh) { | |
fed16f06 | 174 | ret = GL_EOPEN; |
a1bb33af UH |
175 | goto gl_open_error; |
176 | } | |
177 | ||
fed16f06 UH |
178 | ret = libusb_set_configuration(g_devh, 1); |
179 | if (ret < 0) { | |
180 | ret = GL_ESETCONFIG; | |
a1bb33af UH |
181 | goto gl_open_error; |
182 | } | |
183 | ||
fed16f06 UH |
184 | ret = libusb_claim_interface(g_devh, 0); |
185 | if (ret < 0) { | |
186 | ret = GL_ECLAIM; | |
a1bb33af UH |
187 | goto gl_open_error; |
188 | } | |
189 | ||
190 | return GL_OK; | |
191 | ||
192 | gl_open_error: | |
193 | gl_close(); | |
fed16f06 | 194 | return ret; |
a1bb33af UH |
195 | } |
196 | ||
197 | int gl_close(void) | |
198 | { | |
199 | if (g_devh) { | |
200 | libusb_release_interface(g_devh, 0); | |
201 | libusb_reset_device(g_devh); | |
202 | libusb_close(g_devh); | |
203 | } | |
204 | libusb_exit(NULL); | |
205 | ||
206 | return 0; | |
207 | } |