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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> | |
45c59c8b BV |
34 | #include "libsigrok.h" |
35 | #include "libsigrok-internal.h" | |
a1bb33af UH |
36 | #include "gl_usb.h" |
37 | ||
fed16f06 UH |
38 | #define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN | \ |
39 | LIBUSB_RECIPIENT_INTERFACE) | |
40 | #define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT | \ | |
41 | LIBUSB_RECIPIENT_INTERFACE) | |
ca070ed9 | 42 | #define EP1_BULK_IN (LIBUSB_ENDPOINT_IN | 1) |
fed16f06 | 43 | |
ca070ed9 | 44 | #define TIMEOUT 5000 /* Timeout in ms */ |
a1bb33af UH |
45 | |
46 | enum { | |
47 | REQ_READBULK = 0x82, | |
48 | REQ_WRITEADDR, | |
49 | REQ_READDATA, | |
50 | REQ_WRITEDATA, | |
51 | }; | |
52 | ||
ca070ed9 | 53 | static int gl_write_address(libusb_device_handle *devh, unsigned int address) |
a1bb33af | 54 | { |
fed16f06 UH |
55 | unsigned char packet[8] = { address & 0xFF }; |
56 | int ret; | |
57 | ||
58 | ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEADDR, | |
59 | 0, packet, 1, TIMEOUT); | |
60 | if (ret != 1) | |
0aeb0ccd | 61 | sr_err("zp: %s: libusb_control_transfer returned %d.", |
6bb5c5fa | 62 | __func__, ret); |
fed16f06 | 63 | return ret; |
a1bb33af UH |
64 | } |
65 | ||
ca070ed9 | 66 | static int gl_write_data(libusb_device_handle *devh, unsigned int val) |
a1bb33af | 67 | { |
fed16f06 UH |
68 | unsigned char packet[8] = { val & 0xFF }; |
69 | int ret; | |
70 | ||
71 | ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEDATA, | |
72 | 0, packet, 1, TIMEOUT); | |
73 | if (ret != 1) | |
0aeb0ccd | 74 | sr_err("zp: %s: libusb_control_transfer returned %d.", |
6bb5c5fa | 75 | __func__, ret); |
fed16f06 | 76 | return ret; |
a1bb33af UH |
77 | } |
78 | ||
ca070ed9 | 79 | static int gl_read_data(libusb_device_handle *devh) |
a1bb33af | 80 | { |
fed16f06 UH |
81 | unsigned char packet[8] = { 0 }; |
82 | int ret; | |
83 | ||
84 | ret = libusb_control_transfer(devh, CTRL_IN, 0xc, REQ_READDATA, | |
85 | 0, packet, 1, TIMEOUT); | |
86 | if (ret != 1) | |
7b48d6e1 | 87 | sr_err("zp: %s: libusb_control_transfer returned %d, " |
0aeb0ccd | 88 | "val=%hhx.", __func__, ret, packet[0]); |
fed16f06 | 89 | return (ret == 1) ? packet[0] : ret; |
a1bb33af UH |
90 | } |
91 | ||
ca070ed9 UH |
92 | SR_PRIV int gl_read_bulk(libusb_device_handle *devh, void *buffer, |
93 | unsigned int size) | |
a1bb33af | 94 | { |
fed16f06 UH |
95 | unsigned char packet[8] = |
96 | { 0, 0, 0, 0, size & 0xff, (size & 0xff00) >> 8, | |
97 | (size & 0xff0000) >> 16, (size & 0xff000000) >> 24 }; | |
98 | int ret, transferred = 0; | |
99 | ||
100 | ret = libusb_control_transfer(devh, CTRL_OUT, 0x4, REQ_READBULK, | |
101 | 0, packet, 8, TIMEOUT); | |
102 | if (ret != 8) | |
0aeb0ccd | 103 | sr_err("zp: %s: libusb_control_transfer returned %d.", |
6bb5c5fa | 104 | __func__, ret); |
fed16f06 | 105 | |
ca070ed9 | 106 | ret = libusb_bulk_transfer(devh, EP1_BULK_IN, buffer, size, |
fed16f06 UH |
107 | &transferred, TIMEOUT); |
108 | if (ret < 0) | |
0aeb0ccd | 109 | sr_err("zp: Bulk read error %d.", ret); |
a1bb33af UH |
110 | return transferred; |
111 | } | |
112 | ||
ca070ed9 | 113 | SR_PRIV int gl_reg_write(libusb_device_handle *devh, unsigned int reg, |
fed16f06 | 114 | unsigned int val) |
a1bb33af | 115 | { |
fed16f06 UH |
116 | int ret; |
117 | ||
118 | ret = gl_write_address(devh, reg); | |
119 | if (ret < 0) | |
120 | return ret; | |
121 | ret = gl_write_data(devh, val); | |
122 | return ret; | |
a1bb33af UH |
123 | } |
124 | ||
ca070ed9 | 125 | SR_PRIV int gl_reg_read(libusb_device_handle *devh, unsigned int reg) |
a1bb33af | 126 | { |
fed16f06 UH |
127 | int ret; |
128 | ||
129 | ret = gl_write_address(devh, reg); | |
130 | if (ret < 0) | |
131 | return ret; | |
132 | ret = gl_read_data(devh); | |
133 | return ret; | |
a1bb33af | 134 | } |