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1 | /* |
2 | * Tool for USB communication with Mega Everdrive |
3 | * Copyright (c) 2013,2014 notaz |
4 | * |
5 | * Permission is hereby granted, free of charge, to any person obtaining |
6 | * a copy of this software and associated documentation files (the |
7 | * "Software"), to deal in the Software without restriction, including |
8 | * without limitation the rights to use, copy, modify, merge, publish, |
9 | * distribute, sublicense, and/or sell copies of the Software, and to |
10 | * permit persons to whom the Software is furnished to do so, subject to |
11 | * the following conditions: |
12 | * |
13 | * The above copyright notice and this permission notice shall be |
14 | * included in all copies or substantial portions of the Software. |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
17 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
19 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
20 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
21 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
22 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
23 | * SOFTWARE. |
24 | */ |
25 | |
9f5a788d |
26 | #define _BSD_SOURCE |
27 | #include <stdio.h> |
28 | #include <string.h> |
29 | #include <stdlib.h> |
30 | #include <string.h> |
31 | #include <sys/types.h> |
32 | #include <sys/stat.h> |
33 | #include <fcntl.h> |
34 | #include <termios.h> |
35 | #include <unistd.h> |
36 | |
37 | static int setup(int fd) |
38 | { |
9f5a788d |
39 | struct termios tty; |
40 | int ret; |
41 | |
42 | memset(&tty, 0, sizeof(tty)); |
43 | |
44 | ret = tcgetattr(fd, &tty); |
45 | if (ret != 0) |
46 | { |
47 | perror("tcgetattr"); |
48 | return 1; |
49 | } |
50 | |
51 | tty.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP |
52 | | INLCR | IGNCR | ICRNL | IXON); |
53 | tty.c_oflag &= ~OPOST; |
54 | tty.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN); |
55 | tty.c_cflag &= ~(CSIZE | PARENB); |
56 | tty.c_cflag |= CS8; |
57 | |
58 | //tty.c_cc[VMIN] = 1; |
59 | //tty.c_cc[VTIME] = 5; // 0.5 seconds read timeout |
60 | |
61 | ret = tcsetattr(fd, TCSANOW, &tty); |
62 | if (ret != 0) { |
63 | perror("tcsetattr"); |
64 | return ret; |
65 | } |
66 | |
67 | return 0; |
68 | } |
69 | |
70 | static int write_to_cart(int fd, const void *data, size_t size) |
71 | { |
72 | int ret; |
73 | |
74 | ret = write(fd, data, size); |
75 | if (ret != size) { |
76 | perror("write"); |
77 | exit(1); |
78 | //return -1; |
79 | } |
80 | |
81 | return 0; |
82 | } |
83 | |
84 | static int read_from_cart(int fd, void *data, size_t size) |
85 | { |
86 | int ret; |
87 | |
88 | ret = read(fd, data, size); |
89 | if (ret != (int)size) { |
90 | perror("read"); |
91 | exit(1); |
92 | //return -1; |
93 | } |
94 | |
95 | return 0; |
96 | } |
97 | |
98 | #define send_cmd(fd, cmd) \ |
0a613c3d |
99 | write_to_cart(fd, cmd, strlen(cmd)) |
9f5a788d |
100 | |
101 | static int read_check_byte(int fd, char expect) |
102 | { |
103 | char r = '0'; |
104 | int ret; |
105 | |
106 | ret = read_from_cart(fd, &r, 1); |
107 | if (ret != 0) { |
108 | fprintf(stderr, "missing response, need '%c'\n", expect); |
109 | return -1; |
110 | } |
111 | |
112 | if (r != expect) { |
113 | fprintf(stderr, "unexpected response: '%c', need '%c'\n", |
114 | r, expect); |
115 | return -1; |
116 | } |
117 | |
118 | return 0; |
119 | } |
120 | |
121 | static int write_with_check(int fd, const void *data, size_t size, char chk) |
122 | { |
123 | int ret; |
124 | |
125 | ret = write_to_cart(fd, data, size); |
126 | if (ret) |
127 | return ret; |
128 | |
129 | ret = read_check_byte(fd, chk); |
130 | if (ret != 0) { |
131 | if (size < 16) |
132 | fprintf(stderr, "data sent: '%16s'\n", |
133 | (const char *)data); |
134 | exit(1); |
135 | //return -1; |
136 | } |
137 | |
138 | return 0; |
139 | } |
140 | |
141 | #define send_cmd_check_k(fd, cmd) \ |
0a613c3d |
142 | write_with_check(fd, cmd, strlen(cmd), 'k') |
9f5a788d |
143 | |
0a613c3d |
144 | static int send_file(int fd, const char *fname, const char *cmd) |
9f5a788d |
145 | { |
9f5a788d |
146 | char buf[0x10000]; |
0a613c3d |
147 | int retval = -1; |
148 | FILE *f = NULL; |
149 | size_t blocksz; |
9f5a788d |
150 | size_t size; |
151 | int blocks; |
9f5a788d |
152 | int ret; |
9f5a788d |
153 | int i; |
154 | |
0a613c3d |
155 | f = fopen(fname, "rb"); |
156 | if (f == NULL) |
157 | { |
158 | fprintf(stderr, "fopen %s: ", fname); |
159 | return -1; |
9f5a788d |
160 | } |
161 | |
0a613c3d |
162 | fseek(f, 0, SEEK_END); |
163 | size = ftell(f); |
164 | fseek(f, 0, SEEK_SET); |
165 | if (size > 0xf00000) { |
166 | fprintf(stderr, "size too large: %zd\n", size); |
167 | goto out; |
168 | } |
9f5a788d |
169 | |
0a613c3d |
170 | if (cmd[1] == 'f') |
171 | blocksz = 1024; |
172 | else |
173 | blocksz = sizeof(buf); |
9f5a788d |
174 | |
0a613c3d |
175 | blocks = (size + blocksz - 1) / blocksz; |
176 | |
177 | send_cmd(fd, cmd); |
178 | ret = write_with_check(fd, &blocks, 1, 'k'); |
179 | if (ret) |
180 | return ret; |
181 | |
182 | // at this point, 'd' will arrive even if we don't |
183 | // write any more data, what's the point of that? |
184 | // probably a timeout? |
185 | |
186 | for (i = 0; i < blocks; i++) { |
187 | ret = fread(buf, 1, blocksz, f); |
188 | if (i != blocks - 1 && ret != blocksz) { |
189 | fprintf(stderr, "failed to read block %d/%d\n", |
190 | i, blocks); |
9f5a788d |
191 | } |
0a613c3d |
192 | if (ret < blocksz) |
193 | memset(buf + ret, 0, blocksz - ret); |
194 | |
195 | write_to_cart(fd, buf, blocksz); |
196 | } |
9f5a788d |
197 | |
0a613c3d |
198 | ret = read_check_byte(fd, 'd'); |
199 | if (ret) |
200 | goto out; |
9f5a788d |
201 | |
0a613c3d |
202 | retval = 0; |
203 | out: |
204 | if (f != NULL) |
205 | fclose(f); |
9f5a788d |
206 | |
0a613c3d |
207 | return retval; |
208 | } |
9f5a788d |
209 | |
0a613c3d |
210 | static void usage(const char *argv0) |
211 | { |
212 | printf("usage:\n" |
213 | "%s [-d <ttydevice>] [-f <file>] command(s)\n" |
214 | "known commands for ED OS:\n" |
215 | " *g - upload game\n" |
216 | " *w - upload and start OS\n" |
217 | " *o - upload and start OS\n" |
218 | " *f - upload (and start?) FPGA firmware\n" |
219 | " *s - start last ROM (same as pressing start in menu)\n" |
220 | " *r<x> - run SDRAM contents as mapper x:\n" |
221 | " s - sms, m - md, o - OS app, c - cd BIOS, M - md10m\n" |
222 | "upload commands must be followed by -f <file>\n" |
223 | , argv0); |
224 | exit(1); |
225 | } |
226 | |
227 | static void invarg(int argc, char *argv[], int arg) |
228 | { |
229 | if (arg < argc) |
230 | fprintf(stderr, "invalid arg %d: \"%s\"\n", arg, argv[arg]); |
231 | else |
232 | fprintf(stderr, "missing required argument %d\n", arg); |
233 | exit(1); |
234 | } |
235 | |
236 | int main(int argc, char *argv[]) |
237 | { |
238 | const char *portname = "/dev/ttyUSB0"; |
239 | const char *pending_cmd = NULL; |
240 | int ret = -1; |
241 | int arg = 1; |
242 | int fd; |
243 | |
244 | if (argc < 2 || !strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) |
245 | usage(argv[0]); |
9f5a788d |
246 | |
0a613c3d |
247 | if (!strcmp(argv[arg], "-d")) { |
248 | arg++; |
249 | if (argv[arg] != NULL) |
250 | portname = argv[arg]; |
251 | else |
252 | invarg(argc, argv, arg); |
253 | arg++; |
254 | } |
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255 | |
0a613c3d |
256 | fd = open(portname, O_RDWR | O_NOCTTY | O_SYNC); |
257 | if (fd < 0) { |
258 | fprintf(stderr, "open %s: ", portname); |
259 | perror(""); |
260 | return 1; |
9f5a788d |
261 | } |
262 | |
0a613c3d |
263 | setup(fd); |
9f5a788d |
264 | |
0a613c3d |
265 | send_cmd_check_k(fd, " *T"); |
266 | |
267 | for (; arg < argc; arg++) { |
268 | if (!strcmp(argv[arg], "-f")) { |
269 | arg++; |
270 | if (argv[arg] == NULL) |
271 | invarg(argc, argv, argc); |
272 | if (pending_cmd == NULL) |
273 | // assume game upload |
274 | pending_cmd = "*g"; |
275 | |
276 | ret = send_file(fd, argv[arg], pending_cmd); |
277 | if (ret) |
278 | return ret; |
279 | |
280 | pending_cmd = NULL; |
281 | continue; |
282 | } |
283 | if (argv[arg + 1] && !strcmp(argv[arg + 1], "-f")) { |
284 | /* we'll avoid sending command if there are |
285 | * problems with specified file */ |
286 | pending_cmd = argv[arg]; |
287 | continue; |
288 | } |
289 | |
290 | ret = send_cmd_check_k(fd, argv[arg]); |
291 | } |
292 | |
293 | return ret; |
9f5a788d |
294 | } |