release/src-rt-6.x.4708/linux/linux-2.6.36/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
  41 /* And the same for proc */
  42 int proc_dolasatstring(ctl_table *table, int write,
  43                        void *buffer, size_t *lenp, loff_t *ppos)
  44 {
  45         int r;
  46
  47         r = proc_dostring(table, write, buffer, lenp, ppos);
  48         if ((!write) || r)
  49                 return r;
  50
  51         lasat_write_eeprom_info();
  52
  53         return 0;
  54 }
  55
  56 /* proc function to write EEPROM after changing int entry */
  57 int proc_dolasatint(ctl_table *table, int write,
  58                        void *buffer, size_t *lenp, loff_t *ppos)
  59 {
  60         int r;
  61
  62         r = proc_dointvec(table, write, buffer, lenp, ppos);
  63         if ((!write) || r)
  64                 return r;
  65
  66         lasat_write_eeprom_info();
  67
  68         return 0;
  69 }
  70
  71 #ifdef CONFIG_DS1603
  72 static int rtctmp;
  73
  74 /* proc function to read/write RealTime Clock */
  75 int proc_dolasatrtc(ctl_table *table, int write,
  76                        void *buffer, size_t *lenp, loff_t *ppos)
  77 {
  78         struct timespec ts;
  79         int r;
  80
  81         if (!write) {
  82                 read_persistent_clock(&ts);
  83                 rtctmp = ts.tv_sec;
  84                 /* check for time < 0 and set to 0 */
  85                 if (rtctmp < 0)
  86                         rtctmp = 0;
  87         }
  88         r = proc_dointvec(table, write, buffer, lenp, ppos);
  89         if (r)
  90                 return r;
  91
  92         if (write)
  93                 rtc_mips_set_mmss(rtctmp);
  94
  95         return 0;
  96 }
  97 #endif
  98
  99 #ifdef CONFIG_INET
 100 int proc_lasat_ip(ctl_table *table, int write,
 101                        void *buffer, size_t *lenp, loff_t *ppos)
 102 {
 103         unsigned int ip;
 104         char *p, c;
 105         int len;
 106         char ipbuf[32];
 107
 108         if (!table->data || !table->maxlen || !*lenp ||
 109             (*ppos && !write)) {
 110                 *lenp = 0;
 111                 return 0;
 112         }
 113
 114         if (write) {
 115                 len = 0;
 116                 p = buffer;
 117                 while (len < *lenp) {
 118                         if (get_user(c, p++))
 119                                 return -EFAULT;
 120                         if (c == 0 || c == '\n')
 121                                 break;
 122                         len++;
 123                 }
 124                 if (len >= sizeof(ipbuf)-1)
 125                         len = sizeof(ipbuf) - 1;
 126                 if (copy_from_user(ipbuf, buffer, len))
 127                         return -EFAULT;
 128                 ipbuf[len] = 0;
 129                 *ppos += *lenp;
 130                 /* Now see if we can convert it to a valid IP */
 131                 ip = in_aton(ipbuf);
 132                 *(unsigned int *)(table->data) = ip;
 133                 lasat_write_eeprom_info();
 134         } else {
 135                 ip = *(unsigned int *)(table->data);
 136                 sprintf(ipbuf, "%d.%d.%d.%d",
 137                         (ip)       & 0xff,
 138                         (ip >>  8) & 0xff,
 139                         (ip >> 16) & 0xff,
 140                         (ip >> 24) & 0xff);
 141                 len = strlen(ipbuf);
 142                 if (len > *lenp)
 143                         len = *lenp;
 144                 if (len)
 145                         if (copy_to_user(buffer, ipbuf, len))
 146                                 return -EFAULT;
 147                 if (len < *lenp) {
 148                         if (put_user('\n', ((char *) buffer) + len))
 149                                 return -EFAULT;
 150                         len++;
 151                 }
 152                 *lenp = len;
 153                 *ppos += len;
 154         }
 155
 156         return 0;
 157 }
 158 #endif
 159
 160 int proc_lasat_prid(ctl_table *table, int write,
 161                        void *buffer, size_t *lenp, loff_t *ppos)
 162 {
 163         int r;
 164
 165         r = proc_dointvec(table, write, buffer, lenp, ppos);
 166         if (r < 0)
 167                 return r;
 168         if (write) {
 169                 lasat_board_info.li_eeprom_info.prid =
 170                         lasat_board_info.li_prid;
 171                 lasat_write_eeprom_info();
 172                 lasat_init_board_info();
 173         }
 174         return 0;
 175 }
 176
 177 extern int lasat_boot_to_service;
 178
 179 static ctl_table lasat_table[] = {
 180         {
 181                 .procname       = "cpu-hz",
 182                 .data           = &lasat_board_info.li_cpu_hz,
 183                 .maxlen         = sizeof(int),
 184                 .mode           = 0444,
 185                 .proc_handler   = proc_dointvec,
 186         },
 187         {
 188                 .procname       = "bus-hz",
 189                 .data           = &lasat_board_info.li_bus_hz,
 190                 .maxlen         = sizeof(int),
 191                 .mode           = 0444,
 192                 .proc_handler   = proc_dointvec,
 193         },
 194         {
 195                 .procname       = "bmid",
 196                 .data           = &lasat_board_info.li_bmid,
 197                 .maxlen         = sizeof(int),
 198                 .mode           = 0444,
 199                 .proc_handler   = proc_dointvec,
 200         },
 201         {
 202                 .procname       = "prid",
 203                 .data           = &lasat_board_info.li_prid,
 204                 .maxlen         = sizeof(int),
 205                 .mode           = 0644,
 206                 .proc_handler   = proc_lasat_prid,
 207         },
 208 #ifdef CONFIG_INET
 209         {
 210                 .procname       = "ipaddr",
 211                 .data           = &lasat_board_info.li_eeprom_info.ipaddr,
 212                 .maxlen         = sizeof(int),
 213                 .mode           = 0644,
 214                 .proc_handler   = proc_lasat_ip,
 215         },
 216         {
 217                 .procname       = "netmask",
 218                 .data           = &lasat_board_info.li_eeprom_info.netmask,
 219                 .maxlen         = sizeof(int),
 220                 .mode           = 0644,
 221                 .proc_handler   = proc_lasat_ip,
 222         },
 223 #endif
 224         {
 225                 .procname       = "passwd_hash",
 226                 .data           = &lasat_board_info.li_eeprom_info.passwd_hash,
 227                 .maxlen         =
 228                         sizeof(lasat_board_info.li_eeprom_info.passwd_hash),
 229                 .mode           = 0600,
 230                 .proc_handler   = proc_dolasatstring,
 231         },
 232         {
 233                 .procname       = "boot-service",
 234                 .data           = &lasat_boot_to_service,
 235                 .maxlen         = sizeof(int),
 236                 .mode           = 0644,
 237                 .proc_handler   = proc_dointvec,
 238         },
 239 #ifdef CONFIG_DS1603
 240         {
 241                 .procname       = "rtc",
 242                 .data           = &rtctmp,
 243                 .maxlen         = sizeof(int),
 244                 .mode           = 0644,
 245                 .proc_handler   = proc_dolasatrtc,
 246         },
 247 #endif
 248         {
 249                 .procname       = "namestr",
 250                 .data           = &lasat_board_info.li_namestr,
 251                 .maxlen         = sizeof(lasat_board_info.li_namestr),
 252                 .mode           = 0444,
 253                 .proc_handler   = proc_dostring,
 254         },
 255         {
 256                 .procname       = "typestr",
 257                 .data           = &lasat_board_info.li_typestr,
 258                 .maxlen         = sizeof(lasat_board_info.li_typestr),
 259                 .mode           = 0444,
 260                 .proc_handler   = proc_dostring,
 261         },
 262         {}
 263 };
 264
 265 static ctl_table lasat_root_table[] = {
 266         {
 267                 .procname       = "lasat",
 268                 .mode           =  0555,
 269                 .child          = lasat_table
 270         },
 271         {}
 272 };
 273
 274 static int __init lasat_register_sysctl(void)
 275 {
 276         struct ctl_table_header *lasat_table_header;
 277
 278         lasat_table_header =
 279                 register_sysctl_table(lasat_root_table);
 280         if (!lasat_table_header) {
 281                 printk(KERN_ERR "Unable to register LASAT sysctl\n");
 282                 return -ENOMEM;
 283         }
 284
 285         return 0;
 286 }
 287
 288 __initcall(lasat_register_sysctl);