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/uaccess.h>
  33
  34 #include <asm/time.h>
  35
  36 #ifdef CONFIG_DS1603
  37 #include "ds1603.h"
  38 #endif
  39
  40 /* Strategy function to write EEPROM after changing string entry */
  41 int sysctl_lasatstring(ctl_table *table, int *name, int nlen,
  42                 void *oldval, size_t *oldlenp,
  43                 void *newval, size_t newlen)
  44 {
  45         int r;
  46
  47         r = sysctl_string(table, name,
  48                           nlen, oldval, oldlenp, newval, newlen);
  49         if (r < 0)
  50                 return r;
  51
  52         if (newval && newlen)
  53                 lasat_write_eeprom_info();
  54
  55         return 0;
  56 }
  57
  58
  59 /* And the same for proc */
  60 int proc_dolasatstring(ctl_table *table, int write, struct file *filp,
  61                        void *buffer, size_t *lenp, loff_t *ppos)
  62 {
  63         int r;
  64
  65         r = proc_dostring(table, write, filp, buffer, lenp, ppos);
  66         if ((!write) || r)
  67                 return r;
  68
  69         lasat_write_eeprom_info();
  70
  71         return 0;
  72 }
  73
  74 /* proc function to write EEPROM after changing int entry */
  75 int proc_dolasatint(ctl_table *table, int write, struct file *filp,
  76                        void *buffer, size_t *lenp, loff_t *ppos)
  77 {
  78         int r;
  79
  80         r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
  81         if ((!write) || r)
  82                 return r;
  83
  84         lasat_write_eeprom_info();
  85
  86         return 0;
  87 }
  88
  89 #ifdef CONFIG_DS1603
  90 static int rtctmp;
  91
  92 /* proc function to read/write RealTime Clock */
  93 int proc_dolasatrtc(ctl_table *table, int write, struct file *filp,
  94                        void *buffer, size_t *lenp, loff_t *ppos)
  95 {
  96         int r;
  97
  98         if (!write) {
  99                 rtctmp = read_persistent_clock();
 100                 /* check for time < 0 and set to 0 */
 101                 if (rtctmp < 0)
 102                         rtctmp = 0;
 103         }
 104         r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
 105         if (r)
 106                 return r;
 107
 108         if (write)
 109                 rtc_mips_set_mmss(rtctmp);
 110
 111         return 0;
 112 }
 113 #endif
 114
 115 /* Sysctl for setting the IP addresses */
 116 int sysctl_lasat_intvec(ctl_table *table, int *name, int nlen,
 117                     void *oldval, size_t *oldlenp,
 118                     void *newval, size_t newlen)
 119 {
 120         int r;
 121
 122         r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
 123         if (r < 0)
 124                 return r;
 125
 126         if (newval && newlen)
 127                 lasat_write_eeprom_info();
 128
 129         return 0;
 130 }
 131
 132 #ifdef CONFIG_DS1603
 133 /* Same for RTC */
 134 int sysctl_lasat_rtc(ctl_table *table, int *name, int nlen,
 135                     void *oldval, size_t *oldlenp,
 136                     void *newval, size_t newlen)
 137 {
 138         int r;
 139
 140         rtctmp = read_persistent_clock();
 141         if (rtctmp < 0)
 142                 rtctmp = 0;
 143         r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
 144         if (r < 0)
 145                 return r;
 146         if (newval && newlen)
 147                 rtc_mips_set_mmss(rtctmp);
 148
 149         return r;
 150 }
 151 #endif
 152
 153 #ifdef CONFIG_INET
 154 int proc_lasat_ip(ctl_table *table, int write, struct file *filp,
 155                        void *buffer, size_t *lenp, loff_t *ppos)
 156 {
 157         unsigned int ip;
 158         char *p, c;
 159         int len;
 160         char ipbuf[32];
 161
 162         if (!table->data || !table->maxlen || !*lenp ||
 163             (*ppos && !write)) {
 164                 *lenp = 0;
 165                 return 0;
 166         }
 167
 168         if (write) {
 169                 len = 0;
 170                 p = buffer;
 171                 while (len < *lenp) {
 172                         if (get_user(c, p++))
 173                                 return -EFAULT;
 174                         if (c == 0 || c == '\n')
 175                                 break;
 176                         len++;
 177                 }
 178                 if (len >= sizeof(ipbuf)-1)
 179                         len = sizeof(ipbuf) - 1;
 180                 if (copy_from_user(ipbuf, buffer, len))
 181                         return -EFAULT;
 182                 ipbuf[len] = 0;
 183                 *ppos += *lenp;
 184                 /* Now see if we can convert it to a valid IP */
 185                 ip = in_aton(ipbuf);
 186                 *(unsigned int *)(table->data) = ip;
 187                 lasat_write_eeprom_info();
 188         } else {
 189                 ip = *(unsigned int *)(table->data);
 190                 sprintf(ipbuf, "%d.%d.%d.%d",
 191                         (ip)       & 0xff,
 192                         (ip >>  8) & 0xff,
 193                         (ip >> 16) & 0xff,
 194                         (ip >> 24) & 0xff);
 195                 len = strlen(ipbuf);
 196                 if (len > *lenp)
 197                         len = *lenp;
 198                 if (len)
 199                         if (copy_to_user(buffer, ipbuf, len))
 200                                 return -EFAULT;
 201                 if (len < *lenp) {
 202                         if (put_user('\n', ((char *) buffer) + len))
 203                                 return -EFAULT;
 204                         len++;
 205                 }
 206                 *lenp = len;
 207                 *ppos += len;
 208         }
 209
 210         return 0;
 211 }
 212 #endif
 213
 214 static int sysctl_lasat_prid(ctl_table *table, int *name, int nlen,
 215                                      void *oldval, size_t *oldlenp,
 216                                      void *newval, size_t newlen)
 217 {
 218         int r;
 219
 220         r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
 221         if (r < 0)
 222                 return r;
 223         if (newval && newlen) {
 224                 lasat_board_info.li_eeprom_info.prid = *(int *)newval;
 225                 lasat_write_eeprom_info();
 226                 lasat_init_board_info();
 227         }
 228         return 0;
 229 }
 230
 231 int proc_lasat_prid(ctl_table *table, int write, struct file *filp,
 232                        void *buffer, size_t *lenp, loff_t *ppos)
 233 {
 234         int r;
 235
 236         r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
 237         if (r < 0)
 238                 return r;
 239         if (write) {
 240                 lasat_board_info.li_eeprom_info.prid =
 241                         lasat_board_info.li_prid;
 242                 lasat_write_eeprom_info();
 243                 lasat_init_board_info();
 244         }
 245         return 0;
 246 }
 247
 248 extern int lasat_boot_to_service;
 249
 250 static ctl_table lasat_table[] = {
 251         {
 252                 .ctl_name       = CTL_UNNUMBERED,
 253                 .procname       = "cpu-hz",
 254                 .data           = &lasat_board_info.li_cpu_hz,
 255                 .maxlen         = sizeof(int),
 256                 .mode           = 0444,
 257                 .proc_handler   = &proc_dointvec,
 258                 .strategy       = &sysctl_intvec
 259         },
 260         {
 261                 .ctl_name       = CTL_UNNUMBERED,
 262                 .procname       = "bus-hz",
 263                 .data           = &lasat_board_info.li_bus_hz,
 264                 .maxlen         = sizeof(int),
 265                 .mode           = 0444,
 266                 .proc_handler   = &proc_dointvec,
 267                 .strategy       = &sysctl_intvec
 268         },
 269         {
 270                 .ctl_name       = CTL_UNNUMBERED,
 271                 .procname       = "bmid",
 272                 .data           = &lasat_board_info.li_bmid,
 273                 .maxlen         = sizeof(int),
 274                 .mode           = 0444,
 275                 .proc_handler   = &proc_dointvec,
 276                 .strategy       = &sysctl_intvec
 277         },
 278         {
 279                 .ctl_name       = CTL_UNNUMBERED,
 280                 .procname       = "prid",
 281                 .data           = &lasat_board_info.li_prid,
 282                 .maxlen         = sizeof(int),
 283                 .mode           = 0644,
 284                 .proc_handler   = &proc_lasat_prid,
 285                 .strategy       = &sysctl_lasat_prid
 286         },
 287 #ifdef CONFIG_INET
 288         {
 289                 .ctl_name       = CTL_UNNUMBERED,
 290                 .procname       = "ipaddr",
 291                 .data           = &lasat_board_info.li_eeprom_info.ipaddr,
 292                 .maxlen         = sizeof(int),
 293                 .mode           = 0644,
 294                 .proc_handler   = &proc_lasat_ip,
 295                 .strategy       = &sysctl_lasat_intvec
 296         },
 297         {
 298                 .ctl_name       = CTL_UNNUMBERED,
 299                 .procname       = "netmask",
 300                 .data           = &lasat_board_info.li_eeprom_info.netmask,
 301                 .maxlen         = sizeof(int),
 302                 .mode           = 0644,
 303                 .proc_handler   = &proc_lasat_ip,
 304                 .strategy       = &sysctl_lasat_intvec
 305         },
 306 #endif
 307         {
 308                 .ctl_name       = CTL_UNNUMBERED,
 309                 .procname       = "passwd_hash",
 310                 .data           = &lasat_board_info.li_eeprom_info.passwd_hash,
 311                 .maxlen         =
 312                         sizeof(lasat_board_info.li_eeprom_info.passwd_hash),
 313                 .mode           = 0600,
 314                 .proc_handler   = &proc_dolasatstring,
 315                 .strategy       = &sysctl_lasatstring
 316         },
 317         {
 318                 .ctl_name       = CTL_UNNUMBERED,
 319                 .procname       = "boot-service",
 320                 .data           = &lasat_boot_to_service,
 321                 .maxlen         = sizeof(int),
 322                 .mode           = 0644,
 323                 .proc_handler   = &proc_dointvec,
 324                 .strategy       = &sysctl_intvec
 325         },
 326 #ifdef CONFIG_DS1603
 327         {
 328                 .ctl_name       = CTL_UNNUMBERED,
 329                 .procname       = "rtc",
 330                 .data           = &rtctmp,
 331                 .maxlen         = sizeof(int),
 332                 .mode           = 0644,
 333                 .proc_handler   = &proc_dolasatrtc,
 334                 .strategy       = &sysctl_lasat_rtc
 335         },
 336 #endif
 337         {
 338                 .ctl_name       = CTL_UNNUMBERED,
 339                 .procname       = "namestr",
 340                 .data           = &lasat_board_info.li_namestr,
 341                 .maxlen         = sizeof(lasat_board_info.li_namestr),
 342                 .mode           = 0444,
 343                 .proc_handler   = &proc_dostring,
 344                 .strategy       = &sysctl_string
 345         },
 346         {
 347                 .ctl_name       = CTL_UNNUMBERED,
 348                 .procname       = "typestr",
 349                 .data           = &lasat_board_info.li_typestr,
 350                 .maxlen         = sizeof(lasat_board_info.li_typestr),
 351                 .mode           = 0444,
 352                 .proc_handler   = &proc_dostring,
 353                 .strategy       = &sysctl_string
 354         },
 355         {}
 356 };
 357
 358 static ctl_table lasat_root_table[] = {
 359         {
 360                 .ctl_name       = CTL_UNNUMBERED,
 361                 .procname       = "lasat",
 362                 .mode           =  0555,
 363                 .child          = lasat_table
 364         },
 365         {}
 366 };
 367
 368 static int __init lasat_register_sysctl(void)
 369 {
 370         struct ctl_table_header *lasat_table_header;
 371
 372         lasat_table_header =
 373                 register_sysctl_table(lasat_root_table);
 374         if (!lasat_table_header) {
 375                 printk(KERN_ERR "Unable to register LASAT sysctl\n");
 376                 return -ENOMEM;
 377         }
 378
 379         return 0;
 380 }
 381
 382 __initcall(lasat_register_sysctl);