Jani Nikula | dfda0b6 | 2014-12-10 14:27:07 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2015 Intel Corporation |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice (including the next |
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
| 13 | * Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 21 | * SOFTWARE. |
| 22 | */ |
| 23 | |
| 24 | #include <ctype.h> |
| 25 | #include <errno.h> |
| 26 | #include <regex.h> |
| 27 | #include <stdbool.h> |
| 28 | #include <stdint.h> |
| 29 | #include <stdio.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <string.h> |
| 32 | |
| 33 | #include "intel_reg_spec.h" |
| 34 | |
| 35 | static const struct port_desc port_descs[] = { |
| 36 | { |
| 37 | .name = "mmio", |
| 38 | .port = PORT_MMIO, |
| 39 | .stride = 4, |
| 40 | }, |
| 41 | { |
| 42 | .name = "portio-vga", |
| 43 | .port = PORT_PORTIO_VGA, |
Ville Syrjälä | fb81315 | 2015-08-19 17:12:14 +0300 | [diff] [blame] | 44 | .stride = 1, |
Jani Nikula | dfda0b6 | 2014-12-10 14:27:07 +0200 | [diff] [blame] | 45 | }, |
| 46 | { |
| 47 | .name = "mmio-vga", |
| 48 | .port = PORT_MMIO_VGA, |
Ville Syrjälä | fb81315 | 2015-08-19 17:12:14 +0300 | [diff] [blame] | 49 | .stride = 1, |
Jani Nikula | dfda0b6 | 2014-12-10 14:27:07 +0200 | [diff] [blame] | 50 | }, |
| 51 | { |
| 52 | .name = "bunit", |
| 53 | .port = PORT_BUNIT, |
| 54 | .stride = 1, |
| 55 | }, |
| 56 | { |
| 57 | .name = "punit", |
| 58 | .port = PORT_PUNIT, |
| 59 | .stride = 1, |
| 60 | }, |
| 61 | { |
| 62 | .name = "nc", |
| 63 | .port = PORT_NC, |
| 64 | .stride = 4, |
| 65 | }, |
| 66 | { |
| 67 | .name = "dpio", |
| 68 | .port = PORT_DPIO, |
| 69 | .stride = 4, |
| 70 | }, |
| 71 | { |
| 72 | .name = "gpio-nc", |
| 73 | .port = PORT_GPIO_NC, |
| 74 | .stride = 4, |
| 75 | }, |
| 76 | { |
| 77 | .name = "gpio_nc", |
| 78 | .port = PORT_GPIO_NC, |
| 79 | .stride = 4, |
| 80 | }, |
| 81 | { |
| 82 | .name = "cck", |
| 83 | .port = PORT_CCK, |
| 84 | .stride = 1, |
| 85 | }, |
| 86 | { |
| 87 | .name = "ccu", |
| 88 | .port = PORT_CCU, |
| 89 | .stride = 4, |
| 90 | }, |
| 91 | { |
| 92 | .name = "dpio2", |
| 93 | .port = PORT_DPIO2, |
| 94 | .stride = 4, |
| 95 | }, |
| 96 | { |
| 97 | .name = "flisdsi", |
| 98 | .port = PORT_FLISDSI, |
| 99 | .stride = 1, |
| 100 | }, |
| 101 | }; |
| 102 | |
| 103 | /* |
| 104 | * Parse port desc of the form (PORTNAME|PORTNUM|MMIO-OFFSET) into reg. NULL or |
| 105 | * zero length s is regarded as MMIO. |
| 106 | */ |
| 107 | int parse_port_desc(struct reg *reg, const char *s) |
| 108 | { |
| 109 | enum port_addr port = PORT_NONE; |
| 110 | int i; |
| 111 | |
| 112 | if (s && *s) { |
| 113 | /* See if port is specified by number. */ |
| 114 | char *endp; |
| 115 | unsigned long n = strtoul(s, &endp, 16); |
| 116 | if (endp > s && *endp == 0) { |
| 117 | if (n > PORT_MAX) { |
| 118 | /* Not a sideband port, assume MMIO offset. */ |
| 119 | port = PORT_MMIO; |
| 120 | reg->mmio_offset = n; |
| 121 | } else { |
| 122 | port = n; |
| 123 | reg->mmio_offset = 0; |
| 124 | } |
| 125 | } else { |
| 126 | reg->mmio_offset = 0; |
| 127 | } |
| 128 | } else { |
| 129 | /* No port, default to searching for MMIO. */ |
| 130 | port = PORT_MMIO; |
| 131 | reg->mmio_offset = 0; |
| 132 | } |
| 133 | |
| 134 | for (i = 0; i < ARRAY_SIZE(port_descs); i++) { |
| 135 | if ((port != PORT_NONE && port_descs[i].port == port) || |
| 136 | (s && strcasecmp(s, port_descs[i].name) == 0)) { |
| 137 | reg->port_desc = port_descs[i]; |
| 138 | return 0; |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | return -1; |
| 143 | } |
| 144 | |
| 145 | static const char *skip_space(const char *line) |
| 146 | { |
| 147 | while (*line && isspace(*line)) |
| 148 | line++; |
| 149 | |
| 150 | return line; |
| 151 | } |
| 152 | |
| 153 | static bool ignore_line(const char *line) |
| 154 | { |
| 155 | line = skip_space(line); |
| 156 | |
| 157 | switch (*line) { |
| 158 | case '\0': |
| 159 | case '#': |
| 160 | case ';': |
| 161 | return true; |
| 162 | case '/': |
| 163 | return *(line + 1) == '/'; |
| 164 | } |
| 165 | |
| 166 | return false; |
| 167 | } |
| 168 | |
| 169 | static char *include_file(const char *line, const char *source) |
| 170 | { |
| 171 | char *filename, *p; |
| 172 | |
| 173 | line = skip_space(line); |
| 174 | if (*line == '(') |
| 175 | return NULL; |
| 176 | |
| 177 | /* this'll be plenty */ |
| 178 | filename = malloc(strlen(source) + strlen(line) + 1); |
| 179 | if (!filename) |
| 180 | return NULL; |
| 181 | |
| 182 | p = strrchr(source, '/'); |
| 183 | if (p && *line != '/') { |
| 184 | int len = p - source + 1; |
| 185 | |
| 186 | memcpy(filename, source, len); |
| 187 | strcpy(filename + len, line); |
| 188 | } else { |
| 189 | strcpy(filename, line); |
| 190 | } |
| 191 | |
| 192 | p = strchr(filename, '\n'); |
| 193 | if (p) |
| 194 | *p = '\0'; |
| 195 | |
| 196 | return filename; |
| 197 | } |
| 198 | |
| 199 | #define SPC "[[:space:]]*" |
| 200 | #define SEP SPC "," SPC |
| 201 | #define BEG "^" SPC "\\(" SPC |
| 202 | #define END SPC "\\)" SPC "$" |
| 203 | #define VALUE "([[:print:]]*)" |
| 204 | #define QVALUE "'" VALUE "'" |
| 205 | #define REGEXP BEG QVALUE SEP QVALUE SEP QVALUE END |
| 206 | |
| 207 | static int parse_line(struct reg *reg, const char *line) |
| 208 | { |
| 209 | static regex_t regex; |
| 210 | static bool initialized = false; |
| 211 | regmatch_t match[4]; |
| 212 | int i, ret; |
| 213 | |
| 214 | if (!initialized) { |
| 215 | if (regcomp (®ex, REGEXP, REG_EXTENDED)) { |
| 216 | fprintf(stderr, "regcomp %s\n", REGEXP); |
| 217 | return -1; |
| 218 | } |
| 219 | initialized = true; |
| 220 | } |
| 221 | |
Jani Nikula | dfda0b6 | 2014-12-10 14:27:07 +0200 | [diff] [blame] | 222 | ret = regexec(®ex, line, ARRAY_SIZE(match), match, 0); |
| 223 | if (ret) |
| 224 | ret = -1; |
| 225 | |
| 226 | for (i = 1; i < ARRAY_SIZE(match) && ret == 0; i++) { |
| 227 | char *p, *e; |
| 228 | |
| 229 | p = strndup(line + match[i].rm_so, |
| 230 | match[i].rm_eo - match[i].rm_so); |
| 231 | |
| 232 | if (i == 1) { |
| 233 | reg->name = p; |
| 234 | } else if (i == 2) { |
| 235 | reg->addr = strtoul(p, &e, 16); |
| 236 | free(p); |
| 237 | if (*e) |
| 238 | ret = -1; |
| 239 | } else if (i == 3) { |
| 240 | ret = parse_port_desc(reg, p); |
| 241 | free(p); |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | if (ret) |
| 246 | free(reg->name); |
| 247 | |
| 248 | return ret; |
| 249 | } |
| 250 | |
| 251 | static ssize_t parse_file(struct reg **regs, size_t *nregs, |
| 252 | ssize_t index, const char *filename) |
| 253 | { |
| 254 | FILE *file; |
| 255 | char *line = NULL, *include; |
| 256 | size_t linesize = 0; |
| 257 | int lineno = 0, r; |
| 258 | ssize_t ret = -1; |
| 259 | |
| 260 | file = fopen(filename, "r"); |
| 261 | if (!file) { |
| 262 | fprintf(stderr, "Error: fopen '%s': %s\n", |
| 263 | filename, strerror(errno)); |
| 264 | return -1; |
| 265 | } |
| 266 | |
| 267 | while (getline(&line, &linesize, file) != -1) { |
Chris Wilson | c219cc5 | 2018-02-02 10:07:05 +0000 | [diff] [blame] | 268 | struct reg reg = {}; |
Jani Nikula | dfda0b6 | 2014-12-10 14:27:07 +0200 | [diff] [blame] | 269 | |
| 270 | lineno++; |
| 271 | |
| 272 | if (ignore_line(line)) |
| 273 | continue; |
| 274 | |
| 275 | include = include_file(line, filename); |
| 276 | if (include) { |
| 277 | index = parse_file(regs, nregs, index, include); |
| 278 | free(include); |
| 279 | if (index < 0) { |
| 280 | fprintf(stderr, "Error: %s:%d: %s", |
| 281 | filename, lineno, line); |
| 282 | goto out; |
| 283 | } |
| 284 | continue; |
| 285 | } |
| 286 | |
| 287 | r = parse_line(®, line); |
| 288 | if (r < 0) { |
| 289 | fprintf(stderr, "Error: %s:%d: %s", |
| 290 | filename, lineno, line); |
| 291 | goto out; |
| 292 | } else if (r) { |
| 293 | continue; |
| 294 | } |
| 295 | |
| 296 | if (!*regs || index >= *nregs) { |
| 297 | if (!*regs) |
| 298 | *nregs = 64; |
| 299 | else |
| 300 | *nregs *= 2; |
| 301 | |
| 302 | *regs = recalloc(*regs, *nregs, sizeof(**regs)); |
| 303 | if (!*regs) { |
| 304 | fprintf(stderr, "Error: %s\n", strerror(ENOMEM)); |
| 305 | goto out; |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | (*regs)[index++] = reg; |
| 310 | } |
| 311 | |
| 312 | ret = index; |
| 313 | |
| 314 | out: |
| 315 | free(line); |
| 316 | fclose(file); |
| 317 | |
| 318 | return ret; |
| 319 | } |
| 320 | |
| 321 | /* |
| 322 | * Get register definitions from file. |
| 323 | */ |
| 324 | ssize_t intel_reg_spec_file(struct reg **regs, const char *file) |
| 325 | { |
| 326 | size_t nregs = 0; |
| 327 | *regs = NULL; |
| 328 | |
| 329 | return parse_file(regs, &nregs, 0, file); |
| 330 | } |
| 331 | |
| 332 | /* |
| 333 | * Free the memory allocated for register definitions. |
| 334 | */ |
| 335 | void intel_reg_spec_free(struct reg *regs, size_t n) |
| 336 | { |
| 337 | size_t i; |
| 338 | |
| 339 | for (i = 0; i < n; i++) { |
| 340 | free(regs[i].name); |
| 341 | } |
| 342 | free(regs); |
| 343 | } |
Ville Syrjälä | 7d2f1d7 | 2015-08-19 17:34:45 +0300 | [diff] [blame] | 344 | |
| 345 | void intel_reg_spec_print_ports(void) |
| 346 | { |
| 347 | int i; |
| 348 | |
| 349 | for (i = 0; i < ARRAY_SIZE(port_descs); i++) |
| 350 | printf("%s%s", i == 0 ? "" : ", ", port_descs[i].name); |
| 351 | } |