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 <asm/uaccess.h>
  34
  35 #include "sysctl.h"
  36 #include "ds1603.h"
  37
  38 static DEFINE_MUTEX(lasat_info_mutex);
  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         mutex_lock(&lasat_info_mutex);
  47         r = sysctl_string(table, name,
  48                           nlen, oldval, oldlenp, newval, newlen);
  49         if (r < 0) {
  50                 mutex_unlock(&lasat_info_mutex);
  51                 return r;
  52         }
  53         if (newval && newlen) {
  54                 lasat_write_eeprom_info();
  55         }
  56         mutex_unlock(&lasat_info_mutex);
  57         return 1;
  58 }
  59
  60
  61 /* And the same for proc */
  62 int proc_dolasatstring(ctl_table *table, int write, struct file *filp,
  63                        void *buffer, size_t *lenp, loff_t *ppos)
  64 {
  65         int r;
  66         mutex_lock(&lasat_info_mutex);
  67         r = proc_dostring(table, write, filp, buffer, lenp, ppos);
  68         if ( (!write) || r) {
  69                 mutex_unlock(&lasat_info_mutex);
  70                 return r;
  71         }
  72         lasat_write_eeprom_info();
  73         mutex_unlock(&lasat_info_mutex);
  74         return 0;
  75 }
  76
  77 /* proc function to write EEPROM after changing int entry */
  78 int proc_dolasatint(ctl_table *table, int write, struct file *filp,
  79                        void *buffer, size_t *lenp, loff_t *ppos)
  80 {
  81         int r;
  82         mutex_lock(&lasat_info_mutex);
  83         r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
  84         if ( (!write) || r) {
  85                 mutex_unlock(&lasat_info_mutex);
  86                 return r;
  87         }
  88         lasat_write_eeprom_info();
  89         mutex_unlock(&lasat_info_mutex);
  90         return 0;
  91 }
  92
  93 static int rtctmp;
  94
  95 #ifdef CONFIG_DS1603
  96 /* proc function to read/write RealTime Clock */
  97 int proc_dolasatrtc(ctl_table *table, int write, struct file *filp,
  98                        void *buffer, size_t *lenp, loff_t *ppos)
  99 {
 100         int r;
 101         mutex_lock(&lasat_info_mutex);
 102         if (!write) {
 103                 rtctmp = ds1603_read();
 104                 /* check for time < 0 and set to 0 */
 105                 if (rtctmp < 0)
 106                         rtctmp = 0;
 107         }
 108         r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
 109         if ( (!write) || r) {
 110                 mutex_unlock(&lasat_info_mutex);
 111                 return r;
 112         }
 113         ds1603_set(rtctmp);
 114         mutex_unlock(&lasat_info_mutex);
 115         return 0;
 116 }
 117 #endif
 118
 119 /* Sysctl for setting the IP addresses */
 120 int sysctl_lasat_intvec(ctl_table *table, int *name, int nlen,
 121                     void *oldval, size_t *oldlenp,
 122                     void *newval, size_t newlen)
 123 {
 124         int r;
 125         mutex_lock(&lasat_info_mutex);
 126         r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
 127         if (r < 0) {
 128                 mutex_unlock(&lasat_info_mutex);
 129                 return r;
 130         }
 131         if (newval && newlen) {
 132                 lasat_write_eeprom_info();
 133         }
 134         mutex_unlock(&lasat_info_mutex);
 135         return 1;
 136 }
 137
 138 #ifdef CONFIG_DS1603
 139 /* Same for RTC */
 140 int sysctl_lasat_rtc(ctl_table *table, int *name, int nlen,
 141                     void *oldval, size_t *oldlenp,
 142                     void *newval, size_t newlen)
 143 {
 144         int r;
 145         mutex_lock(&lasat_info_mutex);
 146         rtctmp = ds1603_read();
 147         if (rtctmp < 0)
 148                 rtctmp = 0;
 149         r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
 150         if (r < 0) {
 151                 mutex_unlock(&lasat_info_mutex);
 152                 return r;
 153         }
 154         if (newval && newlen) {
 155                 ds1603_set(rtctmp);
 156         }
 157         mutex_unlock(&lasat_info_mutex);
 158         return 1;
 159 }
 160 #endif
 161
 162 #ifdef CONFIG_INET
 163 static char lasat_bcastaddr[16];
 164
 165 void update_bcastaddr(void)
 166 {
 167         unsigned int ip;
 168
 169         ip = (lasat_board_info.li_eeprom_info.ipaddr &
 170                 lasat_board_info.li_eeprom_info.netmask) |
 171                 ~lasat_board_info.li_eeprom_info.netmask;
 172
 173         sprintf(lasat_bcastaddr, "%d.%d.%d.%d",
 174                         (ip      ) & 0xff,
 175                         (ip >>  8) & 0xff,
 176                         (ip >> 16) & 0xff,
 177                         (ip >> 24) & 0xff);
 178 }
 179
 180 static char proc_lasat_ipbuf[32];
 181 /* Parsing of IP address */
 182 int proc_lasat_ip(ctl_table *table, int write, struct file *filp,
 183                        void *buffer, size_t *lenp, loff_t *ppos)
 184 {
 185         int len;
 186         unsigned int ip;
 187         char *p, c;
 188
 189         if (!table->data || !table->maxlen || !*lenp ||
 190             (*ppos && !write)) {
 191                 *lenp = 0;
 192                 return 0;
 193         }
 194
 195         mutex_lock(&lasat_info_mutex);
 196         if (write) {
 197                 len = 0;
 198                 p = buffer;
 199                 while (len < *lenp) {
 200                         if(get_user(c, p++)) {
 201                                 mutex_unlock(&lasat_info_mutex);
 202                                 return -EFAULT;
 203                         }
 204                         if (c == 0 || c == '\n')
 205                                 break;
 206                         len++;
 207                 }
 208                 if (len >= sizeof(proc_lasat_ipbuf)-1)
 209                         len = sizeof(proc_lasat_ipbuf) - 1;
 210                 if (copy_from_user(proc_lasat_ipbuf, buffer, len))
 211                 {
 212                         mutex_unlock(&lasat_info_mutex);
 213                         return -EFAULT;
 214                 }
 215                 proc_lasat_ipbuf[len] = 0;
 216                 *ppos += *lenp;
 217                 /* Now see if we can convert it to a valid IP */
 218                 ip = in_aton(proc_lasat_ipbuf);
 219                 *(unsigned int *)(table->data) = ip;
 220                 lasat_write_eeprom_info();
 221         } else {
 222                 ip = *(unsigned int *)(table->data);
 223                 sprintf(proc_lasat_ipbuf, "%d.%d.%d.%d",
 224                         (ip      ) & 0xff,
 225                         (ip >>  8) & 0xff,
 226                         (ip >> 16) & 0xff,
 227                         (ip >> 24) & 0xff);
 228                 len = strlen(proc_lasat_ipbuf);
 229                 if (len > *lenp)
 230                         len = *lenp;
 231                 if (len)
 232                         if(copy_to_user(buffer, proc_lasat_ipbuf, len)) {
 233                                 mutex_unlock(&lasat_info_mutex);
 234                                 return -EFAULT;
 235                         }
 236                 if (len < *lenp) {
 237                         if(put_user('\n', ((char *) buffer) + len)) {
 238                                 mutex_unlock(&lasat_info_mutex);
 239                                 return -EFAULT;
 240                         }
 241                         len++;
 242                 }
 243                 *lenp = len;
 244                 *ppos += len;
 245         }
 246         update_bcastaddr();
 247         mutex_unlock(&lasat_info_mutex);
 248         return 0;
 249 }
 250 #endif /* defined(CONFIG_INET) */
 251
 252 static int sysctl_lasat_eeprom_value(ctl_table *table, int *name, int nlen,
 253                                      void *oldval, size_t *oldlenp,
 254                                      void *newval, size_t newlen)
 255 {
 256         int r;
 257
 258         mutex_lock(&lasat_info_mutex);
 259         r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
 260         if (r < 0) {
 261                 mutex_unlock(&lasat_info_mutex);
 262                 return r;
 263         }
 264
 265         if (newval && newlen)
 266         {
 267                 if (name && *name == LASAT_PRID)
 268                         lasat_board_info.li_eeprom_info.prid = *(int*)newval;
 269
 270                 lasat_write_eeprom_info();
 271                 lasat_init_board_info();
 272         }
 273         mutex_unlock(&lasat_info_mutex);
 274
 275         return 0;
 276 }
 277
 278 int proc_lasat_eeprom_value(ctl_table *table, int write, struct file *filp,
 279                        void *buffer, size_t *lenp, loff_t *ppos)
 280 {
 281         int r;
 282         mutex_lock(&lasat_info_mutex);
 283         r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
 284         if ( (!write) || r) {
 285                 mutex_unlock(&lasat_info_mutex);
 286                 return r;
 287         }
 288         if (filp && filp->f_path.dentry)
 289         {
 290                 if (!strcmp(filp->f_path.dentry->d_name.name, "prid"))
 291                         lasat_board_info.li_eeprom_info.prid = lasat_board_info.li_prid;
 292                 if (!strcmp(filp->f_path.dentry->d_name.name, "debugaccess"))
 293                         lasat_board_info.li_eeprom_info.debugaccess = lasat_board_info.li_debugaccess;
 294         }
 295         lasat_write_eeprom_info();
 296         mutex_unlock(&lasat_info_mutex);
 297         return 0;
 298 }
 299
 300 extern int lasat_boot_to_service;
 301
 302 #ifdef CONFIG_SYSCTL
 303
 304 static ctl_table lasat_table[] = {
 305         {LASAT_CPU_HZ, "cpu-hz", &lasat_board_info.li_cpu_hz, sizeof(int),
 306          0444, NULL, &proc_dointvec, &sysctl_intvec},
 307         {LASAT_BUS_HZ, "bus-hz", &lasat_board_info.li_bus_hz, sizeof(int),
 308          0444, NULL, &proc_dointvec, &sysctl_intvec},
 309         {LASAT_MODEL, "bmid", &lasat_board_info.li_bmid, sizeof(int),
 310          0444, NULL, &proc_dointvec, &sysctl_intvec},
 311         {LASAT_PRID, "prid", &lasat_board_info.li_prid, sizeof(int),
 312          0644, NULL, &proc_lasat_eeprom_value, &sysctl_lasat_eeprom_value},
 313 #ifdef CONFIG_INET
 314         {LASAT_IPADDR, "ipaddr", &lasat_board_info.li_eeprom_info.ipaddr, sizeof(int),
 315          0644, NULL, &proc_lasat_ip, &sysctl_lasat_intvec},
 316         {LASAT_NETMASK, "netmask", &lasat_board_info.li_eeprom_info.netmask, sizeof(int),
 317          0644, NULL, &proc_lasat_ip, &sysctl_lasat_intvec},
 318         {LASAT_BCAST, "bcastaddr", &lasat_bcastaddr,
 319                 sizeof(lasat_bcastaddr), 0600, NULL,
 320                 &proc_dostring, &sysctl_string},
 321 #endif
 322         {LASAT_PASSWORD, "passwd_hash", &lasat_board_info.li_eeprom_info.passwd_hash, sizeof(lasat_board_info.li_eeprom_info.passwd_hash),
 323          0600, NULL, &proc_dolasatstring, &sysctl_lasatstring},
 324         {LASAT_SBOOT, "boot-service", &lasat_boot_to_service, sizeof(int),
 325          0644, NULL, &proc_dointvec, &sysctl_intvec},
 326 #ifdef CONFIG_DS1603
 327         {LASAT_RTC, "rtc", &rtctmp, sizeof(int),
 328          0644, NULL, &proc_dolasatrtc, &sysctl_lasat_rtc},
 329 #endif
 330         {LASAT_NAMESTR, "namestr", &lasat_board_info.li_namestr, sizeof(lasat_board_info.li_namestr),
 331          0444, NULL, &proc_dostring, &sysctl_string},
 332         {LASAT_TYPESTR, "typestr", &lasat_board_info.li_typestr, sizeof(lasat_board_info.li_typestr),
 333          0444, NULL, &proc_dostring, &sysctl_string},
 334         {0}
 335 };
 336
 337 #define CTL_LASAT 1     // CTL_ANY ???
 338 static ctl_table lasat_root_table[] = {
 339         { CTL_LASAT, "lasat", NULL, 0, 0555, lasat_table },
 340         { 0 }
 341 };
 342
 343 static int __init lasat_register_sysctl(void)
 344 {
 345         struct ctl_table_header *lasat_table_header;
 346
 347         lasat_table_header =
 348                 register_sysctl_table(lasat_root_table, 0);
 349
 350         return 0;
 351 }
 352
 353 __initcall(lasat_register_sysctl);
 354 #endif /* CONFIG_SYSCTL */