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   1 /*
   2  * Copyright © 2009 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 #include "ao.h"
  19
  20 __pdata uint16_t ao_cmd_lex_i;
  21 __pdata uint32_t ao_cmd_lex_u32;
  22 __pdata char    ao_cmd_lex_c;
  23 __pdata enum ao_cmd_status ao_cmd_status;
  24
  25 #define CMD_LEN 48
  26
  27 static __xdata char     cmd_line[CMD_LEN];
  28 static __pdata uint8_t  cmd_len;
  29 static __pdata uint8_t  cmd_i;
  30
  31 static void
  32 put_string(__code char *s)
  33 {
  34         char    c;
  35         while ((c = *s++))
  36                 putchar(c);
  37 }
  38
  39 static void
  40 readline(void)
  41 {
  42         __pdata char c;
  43         if (ao_echo())
  44                 put_string("> ");
  45         cmd_len = 0;
  46         for (;;) {
  47                 flush();
  48                 c = getchar();
  49                 /* backspace/delete */
  50                 if (c == '\010' || c == '\177') {
  51                         if (cmd_len != 0) {
  52                                 if (ao_echo())
  53                                         put_string("\010 \010");
  54                                 --cmd_len;
  55                         }
  56                         continue;
  57                 }
  58
  59                 /* ^U */
  60                 if (c == '\025') {
  61                         while (cmd_len != 0) {
  62                                 if (ao_echo())
  63                                         put_string("\010 \010");
  64                                 --cmd_len;
  65                         }
  66                         continue;
  67                 }
  68
  69                 /* map CR to NL */
  70                 if (c == '\r')
  71                         c = '\n';
  72
  73                 if (c == '\n') {
  74                         if (ao_echo())
  75                                 putchar('\n');
  76                         break;
  77                 }
  78
  79                 if (cmd_len >= CMD_LEN - 2) {
  80                         if (ao_echo())
  81                                 putchar('\007');
  82                         continue;
  83                 }
  84                 cmd_line[cmd_len++] = c;
  85                 if (ao_echo())
  86                         putchar(c);
  87         }
  88         cmd_line[cmd_len++] = '\n';
  89         cmd_line[cmd_len++] = '\0';
  90         cmd_i = 0;
  91 }
  92
  93 void
  94 ao_cmd_lex(void)
  95 {
  96         ao_cmd_lex_c = '\n';
  97         if (cmd_i < cmd_len)
  98                 ao_cmd_lex_c = cmd_line[cmd_i++];
  99 }
 100
 101 static void
 102 putnibble(uint8_t v)
 103 {
 104         if (v < 10)
 105                 putchar(v + '0');
 106         else
 107                 putchar(v + ('a' - 10));
 108 }
 109
 110 void
 111 ao_cmd_put16(uint16_t v)
 112 {
 113         ao_cmd_put8(v >> 8);
 114         ao_cmd_put8(v);
 115 }
 116
 117 void
 118 ao_cmd_put8(uint8_t v)
 119 {
 120         putnibble((v >> 4) & 0xf);
 121         putnibble(v & 0xf);
 122 }
 123
 124 uint8_t
 125 ao_cmd_is_white(void)
 126 {
 127         return ao_cmd_lex_c == ' ' || ao_cmd_lex_c == '\t';
 128 }
 129
 130 void
 131 ao_cmd_white(void)
 132 {
 133         while (ao_cmd_is_white())
 134                 ao_cmd_lex();
 135 }
 136
 137 int8_t
 138 ao_cmd_hexchar(char c)
 139 {
 140         if ('0' <= c && c <= '9')
 141                 return (c - '0');
 142         if ('a' <= c && c <= 'f')
 143                 return (c - 'a' + 10);
 144         if ('A' <= c && c <= 'F')
 145                 return (c - 'A' + 10);
 146         return -1;
 147 }
 148
 149 void
 150 ao_cmd_hexbyte(void)
 151 {
 152         uint8_t i;
 153         int8_t  n;
 154
 155         ao_cmd_lex_i = 0;
 156         ao_cmd_white();
 157         for (i = 0; i < 2; i++) {
 158                 n = ao_cmd_hexchar(ao_cmd_lex_c);
 159                 if (n < 0) {
 160                         ao_cmd_status = ao_cmd_syntax_error;
 161                         break;
 162                 }
 163                 ao_cmd_lex_i = (ao_cmd_lex_i << 4) | n;
 164                 ao_cmd_lex();
 165         }
 166 }
 167
 168 void
 169 ao_cmd_hex(void)
 170 {
 171         __pdata uint8_t r = ao_cmd_lex_error;
 172         int8_t  n;
 173
 174         ao_cmd_lex_i = 0;
 175         ao_cmd_white();
 176         for(;;) {
 177                 n = ao_cmd_hexchar(ao_cmd_lex_c);
 178                 if (n < 0)
 179                         break;
 180                 ao_cmd_lex_i = (ao_cmd_lex_i << 4) | n;
 181                 r = ao_cmd_success;
 182                 ao_cmd_lex();
 183         }
 184         if (r != ao_cmd_success)
 185                 ao_cmd_status = r;
 186 }
 187
 188 void
 189 ao_cmd_decimal(void)
 190 {
 191         __pdata uint8_t r = ao_cmd_lex_error;
 192
 193         ao_cmd_lex_u32 = 0;
 194         ao_cmd_white();
 195         for(;;) {
 196                 if ('0' <= ao_cmd_lex_c && ao_cmd_lex_c <= '9')
 197                         ao_cmd_lex_u32 = (ao_cmd_lex_u32 * 10) + (ao_cmd_lex_c - '0');
 198                 else
 199                         break;
 200                 r = ao_cmd_success;
 201                 ao_cmd_lex();
 202         }
 203         if (r != ao_cmd_success)
 204                 ao_cmd_status = r;
 205         ao_cmd_lex_i = (uint16_t) ao_cmd_lex_u32;
 206 }
 207
 208 uint8_t
 209 ao_match_word(__code char *word)
 210 {
 211         while (*word) {
 212                 if (ao_cmd_lex_c != *word) {
 213                         ao_cmd_status = ao_cmd_syntax_error;
 214                         return 0;
 215                 }
 216                 word++;
 217                 ao_cmd_lex();
 218         }
 219         return 1;
 220 }
 221
 222 static void
 223 echo(void)
 224 {
 225         ao_cmd_hex();
 226         if (ao_cmd_status == ao_cmd_success)
 227                 ao_stdios[ao_cur_stdio].echo = ao_cmd_lex_i != 0;
 228 }
 229
 230 static void
 231 ao_reboot(void)
 232 {
 233         ao_cmd_white();
 234         if (!ao_match_word("eboot"))
 235                 return;
 236         /* Delay waiting for the packet master to be turned off
 237          * so that we don't end up back in idle mode because we
 238          * received a packet after boot.
 239          */
 240         flush();
 241         ao_delay(AO_SEC_TO_TICKS(1));
 242         ao_arch_reboot();
 243         ao_panic(AO_PANIC_REBOOT);
 244 }
 245
 246 static void
 247 version(void)
 248 {
 249         printf("manufacturer     %s\n", ao_manufacturer);
 250         printf("product          %s\n", ao_product);
 251         printf("serial-number    %u\n", ao_serial_number);
 252 #if HAS_LOG
 253         printf("log-format       %u\n", ao_log_format);
 254 #endif
 255         printf("software-version %s\n", ao_version);
 256 }
 257
 258 #define NUM_CMDS        11
 259
 260 static __code struct ao_cmds    *__xdata (ao_cmds[NUM_CMDS]);
 261 static __pdata uint8_t          ao_ncmds;
 262
 263 static void
 264 help(void)
 265 {
 266         register uint8_t cmds;
 267         register uint8_t cmd;
 268         register __code struct ao_cmds * cs;
 269
 270         for (cmds = 0; cmds < ao_ncmds; cmds++) {
 271                 cs = ao_cmds[cmds];
 272                 for (cmd = 0; cs[cmd].func; cmd++)
 273                         printf("%-45s %s\n",
 274                                cs[cmd].help,
 275                                cs[cmd].help+1+strlen(cs[cmd].help));
 276         }
 277 }
 278
 279 static void
 280 report(void)
 281 {
 282         switch(ao_cmd_status) {
 283         case ao_cmd_lex_error:
 284         case ao_cmd_syntax_error:
 285                 puts("Syntax error");
 286                 ao_cmd_status = 0;
 287         default:
 288                 break;
 289         }
 290 }
 291
 292 void
 293 ao_cmd_register(__code struct ao_cmds *cmds)
 294 {
 295         if (ao_ncmds >= NUM_CMDS)
 296                 ao_panic(AO_PANIC_CMD);
 297         ao_cmds[ao_ncmds++] = cmds;
 298 }
 299
 300 void
 301 ao_cmd(void)
 302 {
 303         char    c;
 304         uint8_t cmd, cmds;
 305         __code struct ao_cmds * __xdata cs;
 306         void (*__xdata func)(void);
 307
 308         for (;;) {
 309                 readline();
 310                 ao_cmd_lex();
 311                 ao_cmd_white();
 312                 c = ao_cmd_lex_c;
 313                 ao_cmd_lex();
 314                 if (c == '\r' || c == '\n')
 315                         continue;
 316                 func = (void (*)(void)) NULL;
 317                 for (cmds = 0; cmds < ao_ncmds; cmds++) {
 318                         cs = ao_cmds[cmds];
 319                         for (cmd = 0; cs[cmd].func; cmd++)
 320                                 if (cs[cmd].help[0] == c) {
 321                                         func = cs[cmd].func;
 322                                         break;
 323                                 }
 324                         if (func)
 325                                 break;
 326                 }
 327                 if (func)
 328                         (*func)();
 329                 else
 330                         ao_cmd_status = ao_cmd_syntax_error;
 331                 report();
 332         }
 333 }
 334
 335 __xdata struct ao_task ao_cmd_task;
 336
 337 __code struct ao_cmds   ao_base_cmds[] = {
 338         { help,         "?\0Help" },
 339         { ao_task_info, "T\0Show tasks" },
 340         { echo,         "E <0 off, 1 on>\0Set echo mode" },
 341         { ao_reboot,    "r eboot\0Reboot" },
 342         { version,      "v\0Version" },
 343         { 0,    NULL },
 344 };
 345
 346 void
 347 ao_cmd_init(void)
 348 {
 349         ao_cmd_register(&ao_base_cmds[0]);
 350         ao_add_task(&ao_cmd_task, ao_cmd, "cmd");
 351 }