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1 #!/usr/bin/awk -f
2
3 #-
4 # SPDX-License-Identifier: BSD-2-Clause-FreeBSD
5 #
6 # Copyright (c) 2006 Max Laier.
7 # All rights reserved.
8 #
9 # Redistribution and use in source and binary forms, with or without
10 # modification, are permitted provided that the following conditions
11 # are met:
12 # 1. Redistributions of source code must retain the above copyright
13 #    notice, this list of conditions and the following disclaimer.
14 # 2. Redistributions in binary form must reproduce the above copyright
15 #    notice, this list of conditions and the following disclaimer in the
16 #    documentation and/or other materials provided with the distribution.
17 #
18 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS `AS IS'' AND
19 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 # SUCH DAMAGE.
29 #
30 # $FreeBSD$
31
32 #
33 # Script to generate module .c file from a list of firmware images
34 #
35
36 function usage ()
37 {
38         print "usage: fw_stub <firmware:name>* [-l name] [-m modname] [-c outfile]";
39         exit 1;
40 }
41
42 #   These are just for convenience ...
43 function printc(s)
44 {
45         if (opt_c)
46                 print s > ctmpfilename;
47         else
48                 print s > "/dev/stdout";
49 }
50
51 BEGIN {
52
53 #
54 #   Process the command line.
55 #
56
57 num_files = 0;
58
59 for (i = 1; i < ARGC; i++) {
60         if (ARGV[i] ~ /^-/) {
61                 #
62                 #   awk doesn't have getopt(), so we have to do it ourselves.
63                 #   This is a bit clumsy, but it works.
64                 #
65                 for (j = 2; j <= length(ARGV[i]); j++) {
66                         o = substr(ARGV[i], j, 1);
67                         if (o == "c") {
68                                 if (length(ARGV[i]) > j) {
69                                         opt_c = substr(ARGV[i], j + 1);
70                                         break;
71                                 }
72                                 else {
73                                         if (++i < ARGC)
74                                                 opt_c = ARGV[i];
75                                         else
76                                                 usage();
77                                 }
78                         } else if (o == "m") {
79                                 if (length(ARGV[i]) > j) {
80                                         opt_m = substr(ARGV[i], j + 1);
81                                         break;
82                                 }
83                                 else {
84                                         if (++i < ARGC)
85                                                 opt_m = ARGV[i];
86                                         else
87                                                 usage();
88                                 }
89                         } else if (o == "l") {
90                                 if (length(ARGV[i]) > j) {
91                                         opt_l = substr(ARGV[i], j + 1);
92                                         break;
93                                 }
94                                 else {
95                                         if (++i < ARGC)
96                                                 opt_l = ARGV[i];
97                                         else
98                                                 usage();
99                                 }
100                         } else
101                                 usage();
102                 }
103         } else {
104                 split(ARGV[i], curr, ":");
105                 filenames[num_files] = curr[1];
106                 if (length(curr[2]) > 0)
107                         shortnames[num_files] = curr[2];
108                 else
109                         shortnames[num_files] = curr[1];
110                 if (length(curr[3]) > 0)
111                         versions[num_files] = int(curr[3]);
112                 else
113                         versions[num_files] = 0;
114                 num_files++;
115         }
116 }
117
118 if (!num_files || !opt_m)
119         usage();
120
121 cfilename = opt_c;
122 ctmpfilename = cfilename ".tmp";
123 modname = opt_m;
124 gsub(/[-\.]/, "_", modname);
125
126 printc("/*\
127  * Automatically generated by:\
128  * $FreeBSD$\
129  */");
130 printc("#include <sys/param.h>");
131 printc("#include <sys/errno.h>");
132 printc("#include <sys/kernel.h>");
133 printc("#include <sys/module.h>");
134 printc("#include <sys/linker.h>");
135 printc("#include <sys/firmware.h>");
136 printc("#include <sys/systm.h>\n");
137
138 if (opt_l) {
139         printc("static long " opt_l "_license_ack = 0;");
140 }
141
142 for (file_i = 0; file_i < num_files; file_i++) {
143         symb = filenames[file_i];
144         # '-', '.' and '/' are converted to '_' by ld/objcopy
145         gsub(/-|\.|\//, "_", symb);
146         printc("extern char _binary_" symb "_start[], _binary_" symb "_end[];");
147 }
148
149 printc("\nstatic int\n"\
150 modname "_fw_modevent(module_t mod, int type, void *unused)\
151 {\
152         const struct firmware *fp, *parent;\
153         int error;\
154         switch (type) {\
155         case MOD_LOAD:\n");
156
157 if (opt_l) {
158                 printc("\
159                 TUNABLE_LONG_FETCH(\"legal." opt_l ".license_ack\", &" opt_l "_license_ack);\
160                 if (!" opt_l "_license_ack) {\
161                         printf(\"" opt_m ": You need to read the LICENSE file in /usr/share/doc/legal/" opt_l ".LICENSE.\\n\");\
162                         printf(\"" opt_m ": If you agree with the license, set legal." opt_l ".license_ack=1 in /boot/loader.conf.\\n\");\
163                         return(EPERM);\
164                 }\n");
165 }
166
167 for (file_i = 0; file_i < num_files; file_i++) {
168         short = shortnames[file_i];
169         symb = filenames[file_i];
170         version = versions[file_i];
171         # '-', '.' and '/' are converted to '_' by ld/objcopy
172         gsub(/-|\.|\//, "_", symb);
173
174         reg = "\t\tfp = ";
175         reg = reg "firmware_register(\"" short "\", _binary_" symb "_start , ";
176         reg = reg "(size_t)(_binary_" symb "_end - _binary_" symb "_start), ";
177         reg = reg version ", ";
178
179         if (file_i == 0)
180                 reg = reg "NULL);";
181         else
182                 reg = reg "parent);";
183
184         printc(reg);
185
186         printc("\t\tif (fp == NULL)");
187         printc("\t\t\tgoto fail_" file_i ";");
188         if (file_i == 0)
189                 printc("\t\tparent = fp;");
190 }
191
192 printc("\t\treturn (0);");
193
194 for (file_i = num_files - 1; file_i > 0; file_i--) {
195         printc("fail_" file_i ":")
196         printc("\t\t(void)firmware_unregister(\"" shortnames[file_i - 1] "\");");
197 }
198
199 printc("\tfail_0:");
200 printc("\t\treturn (ENXIO);");
201
202 printc("\tcase MOD_UNLOAD:");
203
204 for (file_i = 1; file_i < num_files; file_i++) {
205         printc("\t\terror = firmware_unregister(\"" shortnames[file_i] "\");");
206         printc("\t\tif (error)");
207         printc("\t\t\treturn (error);");
208 }
209
210 printc("\t\terror = firmware_unregister(\"" shortnames[0] "\");");
211
212 printc("\t\treturn (error);\
213         }\
214         return (EINVAL);\
215 }\
216 \
217 static moduledata_t " modname "_fw_mod = {\
218         \"" modname "_fw\",\
219         " modname "_fw_modevent,\
220         0\
221 };\
222 DECLARE_MODULE(" modname "_fw, " modname "_fw_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);\
223 MODULE_VERSION(" modname "_fw, 1);\
224 MODULE_DEPEND(" modname "_fw, firmware, 1, 1, 1);\
225 ");
226
227 if (opt_c)
228         if ((rc = system("mv -f " ctmpfilename " " cfilename))) {
229                 print "'mv -f " ctmpfilename " " cfilename "' failed: " rc \
230                     > "/dev/stderr";
231                 exit 1;
232         }
233
234 exit 0;
235
236 }