| 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <string.h> |
| 4 | #include <unistd.h> |
| 5 | #include <sys/io.h> |
| 6 | #include <signal.h> |
| 7 | #include <sys/time.h> |
| 8 | |
| 9 | #include "transfer.h" |
| 10 | |
| 11 | /* |
| 12 | * PC: |
| 13 | * BASE+0 ~ data |
| 14 | * BASE+1 ~ status: BAOSEI?? |
| 15 | * /BUSY, ACK, PE, SLCT, ERROR, IRQ |
| 16 | * BASE+2 ~ control: ??MISIAS |
| 17 | * bidirrectMODE, IRQ_EN, /SLCT_IN, INIT, /AUTO_FD_XT, /STROBE |
| 18 | * |
| 19 | * SEGA |
| 20 | * ?HRL3210 |
| 21 | * TH, TR, TL, D3, D2, D1, D0 |
| 22 | * |
| 23 | * SEGA PC |
| 24 | * 1 D0 <-> 2 D0 |
| 25 | * 2 D1 <-> 3 D1 |
| 26 | * 3 D2 <-> 4 D2 |
| 27 | * 4 D3 <-> 5 D3 |
| 28 | * 5 +5V |
| 29 | * 6 TL <-- 14 /AUTO_FD_XT |
| 30 | * 7 TH --> 10 ACK |
| 31 | * 8 GND --- 21 GND |
| 32 | * 9 TR <-- 17 /SLCT_IN |
| 33 | * |
| 34 | * start: TH low/high, TL high |
| 35 | * |
| 36 | * TH low - lower nibble: MD ready to recv | MD sent to PC |
| 37 | * TL low - lower niblle: sent to MD | ready to recv from MD |
| 38 | * TH high - upper nibble: MD ready to recv | MD sent to PC |
| 39 | * TL high - upper nibble: sent | ready to recv from MD |
| 40 | */ |
| 41 | |
| 42 | #define ACK_TIMEOUT 2000000 |
| 43 | |
| 44 | #define PORT_DATA 888 |
| 45 | #define PORT_STATUS 889 |
| 46 | #define PORT_CONTROL 890 |
| 47 | |
| 48 | #define timediff(now, start) \ |
| 49 | ((now.tv_sec - start.tv_sec) * 1000000 + now.tv_usec - start.tv_usec) |
| 50 | |
| 51 | static void do_exit(const char *msg) |
| 52 | { |
| 53 | /* switch TL back to high */ |
| 54 | outb(0xe0, PORT_CONTROL); |
| 55 | |
| 56 | if (msg) |
| 57 | printf("%s", msg); |
| 58 | exit(1); |
| 59 | } |
| 60 | |
| 61 | static void inthandler(int u) |
| 62 | { |
| 63 | do_exit("\n"); |
| 64 | } |
| 65 | |
| 66 | static void wait_th_low(void) |
| 67 | { |
| 68 | struct timeval start, now; |
| 69 | |
| 70 | gettimeofday(&start, NULL); |
| 71 | |
| 72 | while (inb(PORT_STATUS) & 0x40) { |
| 73 | gettimeofday(&now, NULL); |
| 74 | if (timediff(now, start) > ACK_TIMEOUT) |
| 75 | do_exit("timeout waiting TH low\n"); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | static void wait_th_high(void) |
| 80 | { |
| 81 | struct timeval start, now; |
| 82 | |
| 83 | gettimeofday(&start, NULL); |
| 84 | |
| 85 | while (!(inb(PORT_STATUS) & 0x40)) { |
| 86 | gettimeofday(&now, NULL); |
| 87 | if (timediff(now, start) > ACK_TIMEOUT) |
| 88 | do_exit("timeout waiting TH high\n"); |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | static unsigned int recv_byte(void) |
| 93 | { |
| 94 | unsigned int byte; |
| 95 | |
| 96 | outb(0xe2, PORT_CONTROL); /* TL low */ |
| 97 | |
| 98 | wait_th_low(); |
| 99 | |
| 100 | byte = inb(PORT_DATA) & 0x0f; |
| 101 | |
| 102 | outb(0xe0, PORT_CONTROL); /* TL high */ |
| 103 | |
| 104 | wait_th_high(); |
| 105 | |
| 106 | byte |= inb(PORT_DATA) << 4; |
| 107 | |
| 108 | return byte; |
| 109 | } |
| 110 | |
| 111 | static void send_byte(unsigned int byte) |
| 112 | { |
| 113 | wait_th_low(); |
| 114 | |
| 115 | outb(byte & 0x0f, PORT_DATA); |
| 116 | outb(0xc2, PORT_CONTROL); /* TL low */ |
| 117 | |
| 118 | wait_th_high(); |
| 119 | |
| 120 | outb((byte >> 4) & 0x0f, PORT_DATA); |
| 121 | outb(0xc0, PORT_CONTROL); /* TL high */ |
| 122 | } |
| 123 | |
| 124 | static void send_cmd(unsigned int cmd) |
| 125 | { |
| 126 | send_byte(CMD_PREFIX); |
| 127 | send_byte(cmd); |
| 128 | } |
| 129 | |
| 130 | static void usage(const char *argv0) |
| 131 | { |
| 132 | fprintf(stderr, "usage:\n%s <cmd> [args]\n" |
| 133 | "\tsend <file> <addr> [size]\n" |
| 134 | "\trecv <file> <addr> <size>\n", argv0); |
| 135 | exit(1); |
| 136 | } |
| 137 | |
| 138 | static unsigned int atoi_or_die(const char *a) |
| 139 | { |
| 140 | char *p = NULL; |
| 141 | unsigned int i; |
| 142 | |
| 143 | i = strtoul(a, &p, 0); |
| 144 | if (p == NULL || *p != 0) { |
| 145 | fprintf(stderr, "atoi: can't convert: %s\n", a); |
| 146 | exit(1); |
| 147 | } |
| 148 | |
| 149 | return i; |
| 150 | } |
| 151 | |
| 152 | int main(int argc, char *argv[]) |
| 153 | { |
| 154 | unsigned int addr = 0, size = 0, i = 0; |
| 155 | int ret; |
| 156 | unsigned char *data; |
| 157 | FILE *file = NULL; |
| 158 | |
| 159 | if (argc < 2) |
| 160 | usage(argv[0]); |
| 161 | |
| 162 | data = malloc(0x1000000); |
| 163 | if (data == NULL) { |
| 164 | fprintf(stderr, "can't alloc %d bytes\n", 0x1000000); |
| 165 | return 1; |
| 166 | } |
| 167 | |
| 168 | /* parse args, read files.. */ |
| 169 | if (strcmp(argv[1], "send") == 0) |
| 170 | { |
| 171 | if (argc != 4 && argc != 5) |
| 172 | usage(argv[0]); |
| 173 | |
| 174 | file = fopen(argv[2], "rb"); |
| 175 | if (file == NULL) { |
| 176 | fprintf(stderr, "can't open file: %s\n", argv[2]); |
| 177 | return 1; |
| 178 | } |
| 179 | |
| 180 | addr = atoi_or_die(argv[3]); |
| 181 | if (argv[4] == NULL) { |
| 182 | fseek(file, 0, SEEK_END); |
| 183 | size = ftell(file); |
| 184 | fseek(file, 0, SEEK_SET); |
| 185 | } |
| 186 | else |
| 187 | size = atoi_or_die(argv[4]); |
| 188 | |
| 189 | ret = fread(data, 1, size, file); |
| 190 | if (ret != size) { |
| 191 | fprintf(stderr, "fread returned %d/%d\n", ret, size); |
| 192 | perror(NULL); |
| 193 | return 1; |
| 194 | } |
| 195 | } |
| 196 | else if (strcmp(argv[1], "recv") == 0) |
| 197 | { |
| 198 | if (argc != 5) |
| 199 | usage(argv[0]); |
| 200 | |
| 201 | file = fopen(argv[2], "wb"); |
| 202 | if (file == NULL) { |
| 203 | fprintf(stderr, "can't open file: %s\n", argv[2]); |
| 204 | return 1; |
| 205 | } |
| 206 | |
| 207 | addr = atoi_or_die(argv[3]); |
| 208 | size = atoi_or_die(argv[4]); |
| 209 | |
| 210 | memset(data, 0, size); |
| 211 | } |
| 212 | else |
| 213 | usage(argv[0]); |
| 214 | |
| 215 | ret = ioperm(PORT_DATA, 3, 1); |
| 216 | if (ret != 0) { |
| 217 | perror("ioperm"); |
| 218 | return 1; |
| 219 | } |
| 220 | |
| 221 | signal(SIGINT, inthandler); |
| 222 | |
| 223 | printf("regs: %02x %02x %02x\n", |
| 224 | inb(PORT_DATA), inb(PORT_STATUS), inb(PORT_CONTROL)); |
| 225 | outb(0xe8, PORT_CONTROL); /* TR low - request for transfer */ |
| 226 | |
| 227 | if (inb(PORT_STATUS) & 0x40) |
| 228 | printf("waiting for TH low..\n"); |
| 229 | while (inb(PORT_STATUS) & 0x40) |
| 230 | sleep(1); |
| 231 | |
| 232 | outb(0xe0, PORT_CONTROL); |
| 233 | |
| 234 | if (strcmp(argv[1], "send") == 0) |
| 235 | { |
| 236 | printf("send %06x %06x\n", addr, size); |
| 237 | send_cmd(CMD_MD_SEND); |
| 238 | send_byte((addr >> 16) & 0xff); |
| 239 | send_byte((addr >> 8) & 0xff); |
| 240 | send_byte((addr >> 0) & 0xff); |
| 241 | send_byte((size >> 16) & 0xff); |
| 242 | send_byte((size >> 8) & 0xff); |
| 243 | send_byte((size >> 0) & 0xff); |
| 244 | |
| 245 | for (i = 0; i < size; i++) |
| 246 | { |
| 247 | if ((i & 0xff) == 0) { |
| 248 | printf("\b\b\b\b\b\b\b\b\b\b\b\b\b"); |
| 249 | printf("%06x/%06x", i, size); |
| 250 | fflush(stdout); |
| 251 | } |
| 252 | |
| 253 | send_byte(data[i]); |
| 254 | } |
| 255 | } |
| 256 | else if (strcmp(argv[1], "recv") == 0) |
| 257 | { |
| 258 | send_cmd(CMD_MD_RECV); |
| 259 | send_byte((addr >> 16) & 0xff); |
| 260 | send_byte((addr >> 8) & 0xff); |
| 261 | send_byte((addr >> 0) & 0xff); |
| 262 | send_byte((size >> 16) & 0xff); |
| 263 | send_byte((size >> 8) & 0xff); |
| 264 | send_byte((size >> 0) & 0xff); |
| 265 | outb(0xe0, PORT_CONTROL); /* TL high, recv mode */ |
| 266 | |
| 267 | for (i = 0; i < size; i++) |
| 268 | { |
| 269 | if ((i & 0xff) == 0) { |
| 270 | printf("\b\b\b\b\b\b\b\b\b\b\b\b\b"); |
| 271 | printf("%06x/%06x", i, size); |
| 272 | fflush(stdout); |
| 273 | } |
| 274 | |
| 275 | data[i] = recv_byte(); |
| 276 | } |
| 277 | |
| 278 | fwrite(data, 1, size, file); |
| 279 | } |
| 280 | printf("\b\b\b\b\b\b\b\b\b\b\b\b\b"); |
| 281 | printf("%06x/%06x\n", i, size); |
| 282 | fclose(file); |
| 283 | |
| 284 | /* switch TL back to high, disable outputs */ |
| 285 | outb(0xe0, PORT_CONTROL); |
| 286 | |
| 287 | return 0; |
| 288 | } |
| 289 | |