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