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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2014 Daniel Elstner <daniel.kitta@gmail.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 | #include "lwla.h" | |
21 | #include "protocol.h" | |
22 | #include "libsigrok-internal.h" | |
23 | ||
24 | SR_PRIV int lwla_send_bitstream(const struct sr_usb_dev_inst *usb, | |
25 | const char *filename) | |
26 | { | |
27 | GMappedFile *file; | |
28 | GError *error; | |
29 | char *stream; | |
30 | size_t length; | |
31 | int ret; | |
32 | int xfer_len; | |
33 | ||
34 | if (usb == NULL || filename == NULL) | |
35 | return SR_ERR_ARG; | |
36 | ||
37 | sr_info("Downloading FPGA bitstream at '%s'.", filename); | |
38 | ||
39 | /* Map bitstream file into memory. */ | |
40 | error = NULL; | |
41 | file = g_mapped_file_new(filename, FALSE, &error); | |
42 | if (!file) { | |
43 | sr_err("Unable to open bitstream file: %s.", error->message); | |
44 | g_error_free(error); | |
45 | return SR_ERR; | |
46 | } | |
47 | stream = g_mapped_file_get_contents(file); | |
48 | length = g_mapped_file_get_length(file); | |
49 | ||
50 | /* Sanity check. */ | |
51 | if (!stream || length < 4 || RB32(stream) != length) { | |
52 | sr_err("Invalid FPGA bitstream."); | |
53 | g_mapped_file_unref(file); | |
54 | return SR_ERR; | |
55 | } | |
56 | ||
57 | /* Transfer the entire bitstream in one URB. */ | |
58 | ret = libusb_bulk_transfer(usb->devhdl, EP_BITSTREAM, | |
59 | (unsigned char *)stream, length, | |
60 | &xfer_len, USB_TIMEOUT); | |
61 | g_mapped_file_unref(file); | |
62 | ||
63 | if (ret != 0) { | |
64 | sr_err("Failed to transfer bitstream: %s.", | |
65 | libusb_error_name(ret)); | |
66 | return SR_ERR; | |
67 | } | |
68 | if (xfer_len != (int)length) { | |
69 | sr_err("Failed to transfer bitstream: incorrect length " | |
70 | "%d != %d.", xfer_len, (int)length); | |
71 | return SR_ERR; | |
72 | } | |
73 | sr_info("FPGA bitstream download of %d bytes done.", xfer_len); | |
74 | ||
75 | /* This delay appears to be necessary for reliable operation. */ | |
76 | g_usleep(30000); | |
77 | ||
78 | return SR_OK; | |
79 | } | |
80 | ||
81 | SR_PRIV int lwla_send_command(const struct sr_usb_dev_inst *usb, | |
82 | const uint16_t *command, int cmd_len) | |
83 | { | |
84 | int ret; | |
85 | int xfer_len; | |
86 | ||
87 | if (usb == NULL || command == NULL || cmd_len <= 0) | |
88 | return SR_ERR_ARG; | |
89 | ||
90 | xfer_len = 0; | |
91 | ret = libusb_bulk_transfer(usb->devhdl, EP_COMMAND, | |
92 | (unsigned char *)command, cmd_len * 2, | |
93 | &xfer_len, USB_TIMEOUT); | |
94 | if (ret != 0) { | |
95 | sr_dbg("Failed to send command %u: %s.", | |
96 | LWLA_READ16(command), libusb_error_name(ret)); | |
97 | return SR_ERR; | |
98 | } | |
99 | if (xfer_len != cmd_len * 2) { | |
100 | sr_dbg("Failed to send command %u: incorrect length %d != %d.", | |
101 | LWLA_READ16(command), xfer_len, cmd_len * 2); | |
102 | return SR_ERR; | |
103 | } | |
104 | return SR_OK; | |
105 | } | |
106 | ||
107 | SR_PRIV int lwla_receive_reply(const struct sr_usb_dev_inst *usb, | |
108 | uint16_t *reply, int reply_len, int expect_len) | |
109 | { | |
110 | int ret; | |
111 | int xfer_len; | |
112 | ||
113 | if (usb == NULL || reply == NULL || reply_len <= 0) | |
114 | return SR_ERR_ARG; | |
115 | ||
116 | xfer_len = 0; | |
117 | ret = libusb_bulk_transfer(usb->devhdl, EP_REPLY, | |
118 | (unsigned char *)reply, reply_len * 2, | |
119 | &xfer_len, USB_TIMEOUT); | |
120 | if (ret != 0) { | |
121 | sr_dbg("Failed to receive reply: %s.", libusb_error_name(ret)); | |
122 | return SR_ERR; | |
123 | } | |
124 | if (xfer_len != expect_len * 2) { | |
125 | sr_dbg("Failed to receive reply: incorrect length %d != %d.", | |
126 | xfer_len, expect_len * 2); | |
127 | return SR_ERR; | |
128 | } | |
129 | return SR_OK; | |
130 | } | |
131 | ||
132 | SR_PRIV int lwla_read_reg(const struct sr_usb_dev_inst *usb, | |
133 | uint16_t reg, uint32_t *value) | |
134 | { | |
135 | int ret; | |
136 | uint16_t command[2]; | |
137 | uint16_t reply[256]; /* full EP buffer to avoid overflows */ | |
138 | ||
139 | command[0] = LWLA_WORD(CMD_READ_REG); | |
140 | command[1] = LWLA_WORD(reg); | |
141 | ||
142 | ret = lwla_send_command(usb, command, G_N_ELEMENTS(command)); | |
143 | ||
144 | if (ret != SR_OK) | |
145 | return ret; | |
146 | ||
147 | ret = lwla_receive_reply(usb, reply, G_N_ELEMENTS(reply), 2); | |
148 | ||
149 | if (ret == SR_OK) | |
150 | *value = LWLA_READ32(reply); | |
151 | ||
152 | return ret; | |
153 | } | |
154 | ||
155 | SR_PRIV int lwla_write_reg(const struct sr_usb_dev_inst *usb, | |
156 | uint16_t reg, uint32_t value) | |
157 | { | |
158 | uint16_t command[4]; | |
159 | ||
160 | command[0] = LWLA_WORD(CMD_WRITE_REG); | |
161 | command[1] = LWLA_WORD(reg); | |
162 | command[2] = LWLA_WORD_0(value); | |
163 | command[3] = LWLA_WORD_1(value); | |
164 | ||
165 | return lwla_send_command(usb, command, G_N_ELEMENTS(command)); | |
166 | } | |
167 | ||
168 | SR_PRIV int lwla_write_regs(const struct sr_usb_dev_inst *usb, | |
169 | const struct regval_pair *regvals, int count) | |
170 | { | |
171 | int i; | |
172 | int ret; | |
173 | ||
174 | ret = SR_OK; | |
175 | ||
176 | for (i = 0; i < count; ++i) { | |
177 | ret = lwla_write_reg(usb, regvals[i].reg, regvals[i].val); | |
178 | ||
179 | if (ret != SR_OK) | |
180 | break; | |
181 | } | |
182 | ||
183 | return ret; | |
184 | } |