arch/mips/lasat/sysctl.c

   1 /*
   2  * Thomas Horsten <thh@lasat.com>
   3  * Copyright (C) 2000 LASAT Networks A/S.
   4  *
   5  *  This program is free software; you can distribute it and/or modify it
   6  *  under the terms of the GNU General Public License (Version 2) as
   7  *  published by the Free Software Foundation.
   8  *
   9  *  This program is distributed in the hope it will be useful, but WITHOUT
  10  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  *  for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License along
  15  *  with this program; if not, write to the Free Software Foundation, Inc.,
  16  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  17  *
  18  * Routines specific to the LASAT boards
  19  */
  20 #include <linux/types.h>
  21 #include <asm/lasat/lasat.h>
  22
  23 #include <linux/module.h>
  24 #include <linux/sysctl.h>
  25 #include <linux/stddef.h>
  26 #include <linux/init.h>
  27 #include <linux/fs.h>
  28 #include <linux/ctype.h>
  29 #include <linux/string.h>
  30 #include <linux/net.h>
  31 #include <linux/inet.h>
  32 #include <linux/mutex.h>
  33 #include <linux/uaccess.h>
  34
  35 #include <asm/time.h>
  36
  37 #include "sysctl.h"
  38 #include "ds1603.h"
  39
  40 static DEFINE_MUTEX(lasat_info_mutex);
  41
  42 /* Strategy function to write EEPROM after changing string entry */
  43 int sysctl_lasatstring(ctl_table *table, int *name, int nlen,
  44                 void *oldval, size_t *oldlenp,
  45                 void *newval, size_t newlen)
  46 {
  47         int r;
  48
  49         mutex_lock(&lasat_info_mutex);
  50         r = sysctl_string(table, name,
  51                           nlen, oldval, oldlenp, newval, newlen);
  52         if (r < 0) {
  53                 mutex_unlock(&lasat_info_mutex);
  54                 return r;
  55         }
  56         if (newval && newlen)
  57                 lasat_write_eeprom_info();
  58         mutex_unlock(&lasat_info_mutex);
  59
  60         return 1;
  61 }
  62
  63
  64 /* And the same for proc */
  65 int proc_dolasatstring(ctl_table *table, int write, struct file *filp,
  66                        void *buffer, size_t *lenp, loff_t *ppos)
  67 {
  68         int r;
  69
  70         mutex_lock(&lasat_info_mutex);
  71         r = proc_dostring(table, write, filp, buffer, lenp, ppos);
  72         if ((!write) || r) {
  73                 mutex_unlock(&lasat_info_mutex);
  74                 return r;
  75         }
  76         lasat_write_eeprom_info();
  77         mutex_unlock(&lasat_info_mutex);
  78
  79         return 0;
  80 }
  81
  82 /* proc function to write EEPROM after changing int entry */
  83 int proc_dolasatint(ctl_table *table, int write, struct file *filp,
  84                        void *buffer, size_t *lenp, loff_t *ppos)
  85 {
  86         int r;
  87
  88         mutex_lock(&lasat_info_mutex);
  89         r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
  90         if ((!write) || r) {
  91                 mutex_unlock(&lasat_info_mutex);
  92                 return r;
  93         }
  94         lasat_write_eeprom_info();
  95         mutex_unlock(&lasat_info_mutex);
  96
  97         return 0;
  98 }
  99
 100 static int rtctmp;
 101
 102 #ifdef CONFIG_DS1603
 103 /* proc function to read/write RealTime Clock */
 104 int proc_dolasatrtc(ctl_table *table, int write, struct file *filp,
 105                        void *buffer, size_t *lenp, loff_t *ppos)
 106 {
 107         int r;
 108
 109         mutex_lock(&lasat_info_mutex);
 110         if (!write) {
 111                 rtctmp = read_persistent_clock();
 112                 /* check for time < 0 and set to 0 */
 113                 if (rtctmp < 0)
 114                         rtctmp = 0;
 115         }
 116         r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
 117         if ((!write) || r) {
 118                 mutex_unlock(&lasat_info_mutex);
 119                 return r;
 120         }
 121         rtc_mips_set_mmss(rtctmp);
 122         mutex_unlock(&lasat_info_mutex);
 123
 124         return 0;
 125 }
 126 #endif
 127
 128 /* Sysctl for setting the IP addresses */
 129 int sysctl_lasat_intvec(ctl_table *table, int *name, int nlen,
 130                     void *oldval, size_t *oldlenp,
 131                     void *newval, size_t newlen)
 132 {
 133         int r;
 134
 135         mutex_lock(&lasat_info_mutex);
 136         r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
 137         if (r < 0) {
 138                 mutex_unlock(&lasat_info_mutex);
 139                 return r;
 140         }
 141         if (newval && newlen)
 142                 lasat_write_eeprom_info();
 143         mutex_unlock(&lasat_info_mutex);
 144
 145         return 1;
 146 }
 147
 148 #ifdef CONFIG_DS1603
 149 /* Same for RTC */
 150 int sysctl_lasat_rtc(ctl_table *table, int *name, int nlen,
 151                     void *oldval, size_t *oldlenp,
 152                     void *newval, size_t newlen)
 153 {
 154         int r;
 155
 156         mutex_lock(&lasat_info_mutex);
 157         rtctmp = read_persistent_clock();
 158         if (rtctmp < 0)
 159                 rtctmp = 0;
 160         r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
 161         if (r < 0) {
 162                 mutex_unlock(&lasat_info_mutex);
 163                 return r;
 164         }
 165         if (newval && newlen)
 166                 rtc_mips_set_mmss(rtctmp);
 167         mutex_unlock(&lasat_info_mutex);
 168
 169         return 1;
 170 }
 171 #endif
 172
 173 #ifdef CONFIG_INET
 174 static char lasat_bcastaddr[16];
 175
 176 void update_bcastaddr(void)
 177 {
 178         unsigned int ip;
 179
 180         ip = (lasat_board_info.li_eeprom_info.ipaddr &
 181                 lasat_board_info.li_eeprom_info.netmask) |
 182                 ~lasat_board_info.li_eeprom_info.netmask;
 183
 184         sprintf(lasat_bcastaddr, "%d.%d.%d.%d",
 185                         (ip)       & 0xff,
 186                         (ip >>  8) & 0xff,
 187                         (ip >> 16) & 0xff,
 188                         (ip >> 24) & 0xff);
 189 }
 190
 191 static char proc_lasat_ipbuf[32];
 192
 193 /* Parsing of IP address */
 194 int proc_lasat_ip(ctl_table *table, int write, struct file *filp,
 195                        void *buffer, size_t *lenp, loff_t *ppos)
 196 {
 197         unsigned int ip;
 198         char *p, c;
 199         int len;
 200
 201         if (!table->data || !table->maxlen || !*lenp ||
 202             (*ppos && !write)) {
 203                 *lenp = 0;
 204                 return 0;
 205         }
 206
 207         mutex_lock(&lasat_info_mutex);
 208         if (write) {
 209                 len = 0;
 210                 p = buffer;
 211                 while (len < *lenp) {
 212                         if (get_user(c, p++)) {
 213                                 mutex_unlock(&lasat_info_mutex);
 214                                 return -EFAULT;
 215                         }
 216                         if (c == 0 || c == '\n')
 217                                 break;
 218                         len++;
 219                 }
 220                 if (len >= sizeof(proc_lasat_ipbuf)-1)
 221                         len = sizeof(proc_lasat_ipbuf) - 1;
 222                 if (copy_from_user(proc_lasat_ipbuf, buffer, len)) {
 223                         mutex_unlock(&lasat_info_mutex);
 224                         return -EFAULT;
 225                 }
 226                 proc_lasat_ipbuf[len] = 0;
 227                 *ppos += *lenp;
 228                 /* Now see if we can convert it to a valid IP */
 229                 ip = in_aton(proc_lasat_ipbuf);
 230                 *(unsigned int *)(table->data) = ip;
 231                 lasat_write_eeprom_info();
 232         } else {
 233                 ip = *(unsigned int *)(table->data);
 234                 sprintf(proc_lasat_ipbuf, "%d.%d.%d.%d",
 235                         (ip)       & 0xff,
 236                         (ip >>  8) & 0xff,
 237                         (ip >> 16) & 0xff,
 238                         (ip >> 24) & 0xff);
 239                 len = strlen(proc_lasat_ipbuf);
 240                 if (len > *lenp)
 241                         len = *lenp;
 242                 if (len)
 243                         if (copy_to_user(buffer, proc_lasat_ipbuf, len)) {
 244                                 mutex_unlock(&lasat_info_mutex);
 245                                 return -EFAULT;
 246                         }
 247                 if (len < *lenp) {
 248                         if (put_user('\n', ((char *) buffer) + len)) {
 249                                 mutex_unlock(&lasat_info_mutex);
 250                                 return -EFAULT;
 251                         }
 252                         len++;
 253                 }
 254                 *lenp = len;
 255                 *ppos += len;
 256         }
 257         update_bcastaddr();
 258         mutex_unlock(&lasat_info_mutex);
 259
 260         return 0;
 261 }
 262 #endif /* defined(CONFIG_INET) */
 263
 264 static int sysctl_lasat_eeprom_value(ctl_table *table, int *name, int nlen,
 265                                      void *oldval, size_t *oldlenp,
 266                                      void *newval, size_t newlen)
 267 {
 268         int r;
 269
 270         mutex_lock(&lasat_info_mutex);
 271         r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
 272         if (r < 0) {
 273                 mutex_unlock(&lasat_info_mutex);
 274                 return r;
 275         }
 276
 277         if (newval && newlen) {
 278                 if (name && *name == LASAT_PRID)
 279                         lasat_board_info.li_eeprom_info.prid = *(int *)newval;
 280
 281                 lasat_write_eeprom_info();
 282                 lasat_init_board_info();
 283         }
 284         mutex_unlock(&lasat_info_mutex);
 285
 286         return 0;
 287 }
 288
 289 int proc_lasat_eeprom_value(ctl_table *table, int write, struct file *filp,
 290                        void *buffer, size_t *lenp, loff_t *ppos)
 291 {
 292         int r;
 293
 294         mutex_lock(&lasat_info_mutex);
 295         r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
 296         if ((!write) || r) {
 297                 mutex_unlock(&lasat_info_mutex);
 298                 return r;
 299         }
 300         if (filp && filp->f_path.dentry) {
 301                 if (!strcmp(filp->f_path.dentry->d_name.name, "prid"))
 302                         lasat_board_info.li_eeprom_info.prid =
 303                                 lasat_board_info.li_prid;
 304                 if (!strcmp(filp->f_path.dentry->d_name.name, "debugaccess"))
 305                         lasat_board_info.li_eeprom_info.debugaccess =
 306                                 lasat_board_info.li_debugaccess;
 307         }
 308         lasat_write_eeprom_info();
 309         mutex_unlock(&lasat_info_mutex);
 310
 311         return 0;
 312 }
 313
 314 extern int lasat_boot_to_service;
 315
 316 #ifdef CONFIG_SYSCTL
 317
 318 static ctl_table lasat_table[] = {
 319         {
 320                 .ctl_name       = CTL_UNNUMBERED,
 321                 .procname       = "cpu-hz",
 322                 .data           = &lasat_board_info.li_cpu_hz,
 323                 .maxlen         = sizeof(int),
 324                 .mode           = 0444,
 325                 .proc_handler   = &proc_dointvec,
 326                 .strategy       = &sysctl_intvec
 327         },
 328         {
 329                 .ctl_name       = CTL_UNNUMBERED,
 330                 .procname       = "bus-hz",
 331                 .data           = &lasat_board_info.li_bus_hz,
 332                 .maxlen         = sizeof(int),
 333                 .mode           = 0444,
 334                 .proc_handler   = &proc_dointvec,
 335                 .strategy       = &sysctl_intvec
 336         },
 337         {
 338                 .ctl_name       = CTL_UNNUMBERED,
 339                 .procname       = "bmid",
 340                 .data           = &lasat_board_info.li_bmid,
 341                 .maxlen         = sizeof(int),
 342                 .mode           = 0444,
 343                 .proc_handler   = &proc_dointvec,
 344                 .strategy       = &sysctl_intvec
 345         },
 346         {
 347                 .ctl_name       = CTL_UNNUMBERED,
 348                 .procname       = "prid",
 349                 .data           = &lasat_board_info.li_prid,
 350                 .maxlen         = sizeof(int),
 351                 .mode           = 0644,
 352                 .proc_handler   = &proc_lasat_eeprom_value,
 353                 .strategy       = &sysctl_lasat_eeprom_value
 354         },
 355 #ifdef CONFIG_INET
 356         {
 357                 .ctl_name       = CTL_UNNUMBERED,
 358                 .procname       = "ipaddr",
 359                 .data           = &lasat_board_info.li_eeprom_info.ipaddr,
 360                 .maxlen         = sizeof(int),
 361                 .mode           = 0644,
 362                 .proc_handler   = &proc_lasat_ip,
 363                 .strategy       = &sysctl_lasat_intvec
 364         },
 365         {
 366                 .ctl_name       = LASAT_NETMASK,
 367                 .procname       = "netmask",
 368                 .data           = &lasat_board_info.li_eeprom_info.netmask,
 369                 .maxlen         = sizeof(int),
 370                 .mode           = 0644,
 371                 .proc_handler   = &proc_lasat_ip,
 372                 .strategy       = &sysctl_lasat_intvec
 373         },
 374         {
 375                 .ctl_name       = CTL_UNNUMBERED,
 376                 .procname       = "bcastaddr",
 377                 .data           = &lasat_bcastaddr,
 378                 .maxlen         = sizeof(lasat_bcastaddr),
 379                 .mode           = 0600,
 380                 .proc_handler   = &proc_dostring,
 381                 .strategy       = &sysctl_string
 382         },
 383 #endif
 384         {
 385                 .ctl_name       = CTL_UNNUMBERED,
 386                 .procname       = "passwd_hash",
 387                 .data           = &lasat_board_info.li_eeprom_info.passwd_hash,
 388                 .maxlen         =
 389                         sizeof(lasat_board_info.li_eeprom_info.passwd_hash),
 390                 .mode           = 0600,
 391                 .proc_handler   = &proc_dolasatstring,
 392                 .strategy       = &sysctl_lasatstring
 393         },
 394         {
 395                 .ctl_name       = CTL_UNNUMBERED,
 396                 .procname       = "boot-service",
 397                 .data           = &lasat_boot_to_service,
 398                 .maxlen         = sizeof(int),
 399                 .mode           = 0644,
 400                 .proc_handler   = &proc_dointvec,
 401                 .strategy       = &sysctl_intvec
 402         },
 403 #ifdef CONFIG_DS1603
 404         {
 405                 .ctl_name       = CTL_UNNUMBERED,
 406                 .procname       = "rtc",
 407                 .data           = &rtctmp,
 408                 .maxlen         = sizeof(int),
 409                 .mode           = 0644,
 410                 .proc_handler   = &proc_dolasatrtc,
 411                 .strategy       = &sysctl_lasat_rtc
 412         },
 413 #endif
 414         {
 415                 .ctl_name       = CTL_UNNUMBERED,
 416                 .procname       = "namestr",
 417                 .data           = &lasat_board_info.li_namestr,
 418                 .maxlen         = sizeof(lasat_board_info.li_namestr),
 419                 .mode           = 0444,
 420                 .proc_handler   =  &proc_dostring,
 421                 .strategy       = &sysctl_string
 422         },
 423         {
 424                 .ctl_name       = CTL_UNNUMBERED,
 425                 .procname       = "typestr",
 426                 .data           = &lasat_board_info.li_typestr,
 427                 .maxlen         = sizeof(lasat_board_info.li_typestr),
 428                 .mode           = 0444,
 429                 .proc_handler   = &proc_dostring,
 430                 .strategy       = &sysctl_string
 431         },
 432         {}
 433 };
 434
 435 static ctl_table lasat_root_table[] = {
 436         {
 437                 .ctl_name       = CTL_UNNUMBERED,
 438                 .procname       = "lasat",
 439                 .mode           =  0555,
 440                 .child          = lasat_table
 441         },
 442         {}
 443 };
 444
 445 static int __init lasat_register_sysctl(void)
 446 {
 447         struct ctl_table_header *lasat_table_header;
 448
 449         lasat_table_header =
 450                 register_sysctl_table(lasat_root_table);
 451
 452         return 0;
 453 }
 454
 455 __initcall(lasat_register_sysctl);
 456 #endif /* CONFIG_SYSCTL */