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1 | /* | |
2 | * This file is part of the libsigrok 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 <config.h> | |
25 | #include <libusb.h> | |
26 | #include <glib.h> | |
27 | #include <glib/gstdio.h> | |
28 | #include <stdio.h> | |
29 | #include <errno.h> | |
30 | #include <string.h> | |
31 | #include <libsigrok/libsigrok.h> | |
32 | #include "libsigrok-internal.h" | |
33 | ||
34 | #define LOG_PREFIX "ezusb" | |
35 | ||
36 | #define FW_CHUNKSIZE (4 * 1024) | |
37 | ||
38 | SR_PRIV int ezusb_reset(struct libusb_device_handle *hdl, int set_clear) | |
39 | { | |
40 | int ret; | |
41 | unsigned char buf[1]; | |
42 | ||
43 | sr_info("setting CPU reset mode %s...", | |
44 | set_clear ? "on" : "off"); | |
45 | buf[0] = set_clear ? 1 : 0; | |
46 | ret = libusb_control_transfer(hdl, LIBUSB_REQUEST_TYPE_VENDOR, 0xa0, | |
47 | 0xe600, 0x0000, buf, 1, 100); | |
48 | if (ret < 0) | |
49 | sr_err("Unable to send control request: %s.", | |
50 | libusb_error_name(ret)); | |
51 | ||
52 | return ret; | |
53 | } | |
54 | ||
55 | SR_PRIV int ezusb_install_firmware(struct sr_context *ctx, | |
56 | libusb_device_handle *hdl, | |
57 | const char *name) | |
58 | { | |
59 | unsigned char *firmware; | |
60 | size_t length, offset, chunksize; | |
61 | int ret, result; | |
62 | ||
63 | /* Max size is 64 kiB since the value field of the setup packet, | |
64 | * which holds the firmware offset, is only 16 bit wide. | |
65 | */ | |
66 | firmware = sr_resource_load(ctx, SR_RESOURCE_FIRMWARE, | |
67 | name, &length, 1 << 16); | |
68 | if (!firmware) | |
69 | return SR_ERR; | |
70 | ||
71 | sr_info("Uploading firmware '%s'.", name); | |
72 | ||
73 | result = SR_OK; | |
74 | offset = 0; | |
75 | while (offset < length) { | |
76 | chunksize = MIN(length - offset, FW_CHUNKSIZE); | |
77 | ||
78 | ret = libusb_control_transfer(hdl, LIBUSB_REQUEST_TYPE_VENDOR | | |
79 | LIBUSB_ENDPOINT_OUT, 0xa0, offset, | |
80 | 0x0000, firmware + offset, | |
81 | chunksize, 100); | |
82 | if (ret < 0) { | |
83 | sr_err("Unable to send firmware to device: %s.", | |
84 | libusb_error_name(ret)); | |
85 | g_free(firmware); | |
86 | return SR_ERR; | |
87 | } | |
88 | sr_info("Uploaded %zu bytes.", chunksize); | |
89 | offset += chunksize; | |
90 | } | |
91 | g_free(firmware); | |
92 | ||
93 | sr_info("Firmware upload done."); | |
94 | ||
95 | return result; | |
96 | } | |
97 | ||
98 | SR_PRIV int ezusb_upload_firmware(struct sr_context *ctx, libusb_device *dev, | |
99 | int configuration, const char *name) | |
100 | { | |
101 | struct libusb_device_handle *hdl; | |
102 | int ret; | |
103 | ||
104 | sr_info("uploading firmware to device on %d.%d", | |
105 | libusb_get_bus_number(dev), libusb_get_device_address(dev)); | |
106 | ||
107 | if ((ret = libusb_open(dev, &hdl)) < 0) { | |
108 | sr_err("failed to open device: %s.", libusb_error_name(ret)); | |
109 | return SR_ERR; | |
110 | } | |
111 | ||
112 | /* | |
113 | * The libusb Darwin backend is broken: it can report a kernel driver being | |
114 | * active, but detaching it always returns an error. | |
115 | */ | |
116 | #if !defined(__APPLE__) | |
117 | if (libusb_kernel_driver_active(hdl, 0) == 1) { | |
118 | if ((ret = libusb_detach_kernel_driver(hdl, 0)) < 0) { | |
119 | sr_err("failed to detach kernel driver: %s", | |
120 | libusb_error_name(ret)); | |
121 | return SR_ERR; | |
122 | } | |
123 | } | |
124 | #endif | |
125 | ||
126 | if ((ret = libusb_set_configuration(hdl, configuration)) < 0) { | |
127 | sr_err("Unable to set configuration: %s", | |
128 | libusb_error_name(ret)); | |
129 | return SR_ERR; | |
130 | } | |
131 | ||
132 | if ((ezusb_reset(hdl, 1)) < 0) | |
133 | return SR_ERR; | |
134 | ||
135 | if (ezusb_install_firmware(ctx, hdl, name) < 0) | |
136 | return SR_ERR; | |
137 | ||
138 | if ((ezusb_reset(hdl, 0)) < 0) | |
139 | return SR_ERR; | |
140 | ||
141 | libusb_close(hdl); | |
142 | ||
143 | return SR_OK; | |
144 | } |