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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> | |
5 | * | |
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 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
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. | |
15 | * | |
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 | */ | |
19 | ||
20 | /* | |
21 | * Helper functions for the Cypress EZ-USB / FX2 series chips. | |
22 | */ | |
23 | ||
24 | #include <libusb.h> | |
25 | #include <glib.h> | |
26 | #include <glib/gstdio.h> | |
27 | #include <stdio.h> | |
28 | #include <errno.h> | |
29 | #include <string.h> | |
30 | #include "libsigrok.h" | |
31 | #include "libsigrok-internal.h" | |
32 | ||
33 | /* Message logging helpers with driver-specific prefix string. */ | |
34 | #define DRIVER_LOG_DOMAIN "ezusb: " | |
35 | #define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args) | |
36 | #define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args) | |
37 | #define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args) | |
38 | #define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args) | |
39 | #define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args) | |
40 | #define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args) | |
41 | ||
42 | SR_PRIV int ezusb_reset(struct libusb_device_handle *hdl, int set_clear) | |
43 | { | |
44 | int ret; | |
45 | unsigned char buf[1]; | |
46 | ||
47 | sr_info("setting CPU reset mode %s...", | |
48 | set_clear ? "on" : "off"); | |
49 | buf[0] = set_clear ? 1 : 0; | |
50 | ret = libusb_control_transfer(hdl, LIBUSB_REQUEST_TYPE_VENDOR, 0xa0, | |
51 | 0xe600, 0x0000, buf, 1, 100); | |
52 | if (ret < 0) | |
53 | sr_err("Unable to send control request: %s.", | |
54 | libusb_error_name(ret)); | |
55 | ||
56 | return ret; | |
57 | } | |
58 | ||
59 | SR_PRIV int ezusb_install_firmware(libusb_device_handle *hdl, | |
60 | const char *filename) | |
61 | { | |
62 | FILE *fw; | |
63 | int offset, chunksize, ret, result; | |
64 | unsigned char buf[4096]; | |
65 | ||
66 | sr_info("Uploading firmware at %s", filename); | |
67 | if ((fw = g_fopen(filename, "rb")) == NULL) { | |
68 | sr_err("Unable to open firmware file %s for reading: %s", | |
69 | filename, strerror(errno)); | |
70 | return SR_ERR; | |
71 | } | |
72 | ||
73 | result = SR_OK; | |
74 | offset = 0; | |
75 | while (1) { | |
76 | chunksize = fread(buf, 1, 4096, fw); | |
77 | if (chunksize == 0) | |
78 | break; | |
79 | ret = libusb_control_transfer(hdl, LIBUSB_REQUEST_TYPE_VENDOR | | |
80 | LIBUSB_ENDPOINT_OUT, 0xa0, offset, | |
81 | 0x0000, buf, chunksize, 100); | |
82 | if (ret < 0) { | |
83 | sr_err("Unable to send firmware to device: %s.", | |
84 | libusb_error_name(ret)); | |
85 | result = SR_ERR; | |
86 | break; | |
87 | } | |
88 | sr_info("Uploaded %d bytes", chunksize); | |
89 | offset += chunksize; | |
90 | } | |
91 | fclose(fw); | |
92 | sr_info("Firmware upload done"); | |
93 | ||
94 | return result; | |
95 | } | |
96 | ||
97 | SR_PRIV int ezusb_upload_firmware(libusb_device *dev, int configuration, | |
98 | const char *filename) | |
99 | { | |
100 | struct libusb_device_handle *hdl; | |
101 | int ret; | |
102 | ||
103 | sr_info("uploading firmware to device on %d.%d", | |
104 | libusb_get_bus_number(dev), libusb_get_device_address(dev)); | |
105 | ||
106 | if ((ret = libusb_open(dev, &hdl)) < 0) { | |
107 | sr_err("failed to open device: %s.", libusb_error_name(ret)); | |
108 | return SR_ERR; | |
109 | } | |
110 | ||
111 | /* | |
112 | * The libusbx darwin backend is broken: it can report a kernel driver being | |
113 | * active, but detaching it always returns an error. | |
114 | */ | |
115 | #if !defined(__APPLE__) | |
116 | if (libusb_kernel_driver_active(hdl, 0) == 1) { | |
117 | if ((ret = libusb_detach_kernel_driver(hdl, 0)) < 0) { | |
118 | sr_err("failed to detach kernel driver: %s", | |
119 | libusb_error_name(ret)); | |
120 | return SR_ERR; | |
121 | } | |
122 | } | |
123 | #endif | |
124 | ||
125 | if ((ret = libusb_set_configuration(hdl, configuration)) < 0) { | |
126 | sr_err("Unable to set configuration: %s", | |
127 | libusb_error_name(ret)); | |
128 | return SR_ERR; | |
129 | } | |
130 | ||
131 | if ((ezusb_reset(hdl, 1)) < 0) | |
132 | return SR_ERR; | |
133 | ||
134 | if (ezusb_install_firmware(hdl, filename) < 0) | |
135 | return SR_ERR; | |
136 | ||
137 | if ((ezusb_reset(hdl, 0)) < 0) | |
138 | return SR_ERR; | |
139 | ||
140 | libusb_close(hdl); | |
141 | ||
142 | return SR_OK; | |
143 | } |