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/sysctl.h>
  24 #include <linux/stddef.h>
  25 #include <linux/init.h>
  26 #include <linux/fs.h>
  27 #include <linux/ctype.h>
  28 #include <linux/string.h>
  29 #include <linux/net.h>
  30 #include <linux/inet.h>
  31 #include <linux/uaccess.h>
  32
  33 #include <asm/time.h>
  34
  35 #ifdef CONFIG_DS1603
  36 #include "ds1603.h"
  37 #endif
  38
  39
  40 /* And the same for proc */
  41 int proc_dolasatstring(struct ctl_table *table, int write,
  42                        void *buffer, size_t *lenp, loff_t *ppos)
  43 {
  44         int r;
  45
  46         r = proc_dostring(table, write, buffer, lenp, ppos);
  47         if ((!write) || r)
  48                 return r;
  49
  50         lasat_write_eeprom_info();
  51
  52         return 0;
  53 }
  54
  55 #ifdef CONFIG_DS1603
  56 static int rtctmp;
  57
  58 /* proc function to read/write RealTime Clock */
  59 int proc_dolasatrtc(struct ctl_table *table, int write,
  60                        void *buffer, size_t *lenp, loff_t *ppos)
  61 {
  62         struct timespec64 ts;
  63         int r;
  64
  65         if (!write) {
  66                 read_persistent_clock64(&ts);
  67                 rtctmp = ts.tv_sec;
  68                 /* check for time < 0 and set to 0 */
  69                 if (rtctmp < 0)
  70                         rtctmp = 0;
  71         }
  72         r = proc_dointvec(table, write, buffer, lenp, ppos);
  73         if (r)
  74                 return r;
  75
  76         if (write) {
  77                 /*
  78                  * Due to the RTC hardware limitation, we can not actually
  79                  * use the full 64-bit range here.
  80                  */
  81                 ts.tv_sec = rtctmp;
  82                 ts.tv_nsec = 0;
  83
  84                 update_persistent_clock64(ts);
  85         }
  86
  87         return 0;
  88 }
  89 #endif
  90
  91 #ifdef CONFIG_INET
  92 int proc_lasat_ip(struct ctl_table *table, int write,
  93                        void *buffer, size_t *lenp, loff_t *ppos)
  94 {
  95         unsigned int ip;
  96         char *p, c;
  97         int len;
  98         char ipbuf[32];
  99
 100         if (!table->data || !table->maxlen || !*lenp ||
 101             (*ppos && !write)) {
 102                 *lenp = 0;
 103                 return 0;
 104         }
 105
 106         if (write) {
 107                 len = 0;
 108                 p = buffer;
 109                 while (len < *lenp) {
 110                         if (get_user(c, p++))
 111                                 return -EFAULT;
 112                         if (c == 0 || c == '\n')
 113                                 break;
 114                         len++;
 115                 }
 116                 if (len >= sizeof(ipbuf)-1)
 117                         len = sizeof(ipbuf) - 1;
 118                 if (copy_from_user(ipbuf, buffer, len))
 119                         return -EFAULT;
 120                 ipbuf[len] = 0;
 121                 *ppos += *lenp;
 122                 /* Now see if we can convert it to a valid IP */
 123                 ip = in_aton(ipbuf);
 124                 *(unsigned int *)(table->data) = ip;
 125                 lasat_write_eeprom_info();
 126         } else {
 127                 ip = *(unsigned int *)(table->data);
 128                 sprintf(ipbuf, "%d.%d.%d.%d",
 129                         (ip)       & 0xff,
 130                         (ip >>  8) & 0xff,
 131                         (ip >> 16) & 0xff,
 132                         (ip >> 24) & 0xff);
 133                 len = strlen(ipbuf);
 134                 if (len > *lenp)
 135                         len = *lenp;
 136                 if (len)
 137                         if (copy_to_user(buffer, ipbuf, len))
 138                                 return -EFAULT;
 139                 if (len < *lenp) {
 140                         if (put_user('\n', ((char *) buffer) + len))
 141                                 return -EFAULT;
 142                         len++;
 143                 }
 144                 *lenp = len;
 145                 *ppos += len;
 146         }
 147
 148         return 0;
 149 }
 150 #endif
 151
 152 int proc_lasat_prid(struct ctl_table *table, int write,
 153                        void *buffer, size_t *lenp, loff_t *ppos)
 154 {
 155         int r;
 156
 157         r = proc_dointvec(table, write, buffer, lenp, ppos);
 158         if (r < 0)
 159                 return r;
 160         if (write) {
 161                 lasat_board_info.li_eeprom_info.prid =
 162                         lasat_board_info.li_prid;
 163                 lasat_write_eeprom_info();
 164                 lasat_init_board_info();
 165         }
 166         return 0;
 167 }
 168
 169 extern int lasat_boot_to_service;
 170
 171 static struct ctl_table lasat_table[] = {
 172         {
 173                 .procname       = "cpu-hz",
 174                 .data           = &lasat_board_info.li_cpu_hz,
 175                 .maxlen         = sizeof(int),
 176                 .mode           = 0444,
 177                 .proc_handler   = proc_dointvec,
 178         },
 179         {
 180                 .procname       = "bus-hz",
 181                 .data           = &lasat_board_info.li_bus_hz,
 182                 .maxlen         = sizeof(int),
 183                 .mode           = 0444,
 184                 .proc_handler   = proc_dointvec,
 185         },
 186         {
 187                 .procname       = "bmid",
 188                 .data           = &lasat_board_info.li_bmid,
 189                 .maxlen         = sizeof(int),
 190                 .mode           = 0444,
 191                 .proc_handler   = proc_dointvec,
 192         },
 193         {
 194                 .procname       = "prid",
 195                 .data           = &lasat_board_info.li_prid,
 196                 .maxlen         = sizeof(int),
 197                 .mode           = 0644,
 198                 .proc_handler   = proc_lasat_prid,
 199         },
 200 #ifdef CONFIG_INET
 201         {
 202                 .procname       = "ipaddr",
 203                 .data           = &lasat_board_info.li_eeprom_info.ipaddr,
 204                 .maxlen         = sizeof(int),
 205                 .mode           = 0644,
 206                 .proc_handler   = proc_lasat_ip,
 207         },
 208         {
 209                 .procname       = "netmask",
 210                 .data           = &lasat_board_info.li_eeprom_info.netmask,
 211                 .maxlen         = sizeof(int),
 212                 .mode           = 0644,
 213                 .proc_handler   = proc_lasat_ip,
 214         },
 215 #endif
 216         {
 217                 .procname       = "passwd_hash",
 218                 .data           = &lasat_board_info.li_eeprom_info.passwd_hash,
 219                 .maxlen         =
 220                         sizeof(lasat_board_info.li_eeprom_info.passwd_hash),
 221                 .mode           = 0600,
 222                 .proc_handler   = proc_dolasatstring,
 223         },
 224         {
 225                 .procname       = "boot-service",
 226                 .data           = &lasat_boot_to_service,
 227                 .maxlen         = sizeof(int),
 228                 .mode           = 0644,
 229                 .proc_handler   = proc_dointvec,
 230         },
 231 #ifdef CONFIG_DS1603
 232         {
 233                 .procname       = "rtc",
 234                 .data           = &rtctmp,
 235                 .maxlen         = sizeof(int),
 236                 .mode           = 0644,
 237                 .proc_handler   = proc_dolasatrtc,
 238         },
 239 #endif
 240         {
 241                 .procname       = "namestr",
 242                 .data           = &lasat_board_info.li_namestr,
 243                 .maxlen         = sizeof(lasat_board_info.li_namestr),
 244                 .mode           = 0444,
 245                 .proc_handler   = proc_dostring,
 246         },
 247         {
 248                 .procname       = "typestr",
 249                 .data           = &lasat_board_info.li_typestr,
 250                 .maxlen         = sizeof(lasat_board_info.li_typestr),
 251                 .mode           = 0444,
 252                 .proc_handler   = proc_dostring,
 253         },
 254         {}
 255 };
 256
 257 static struct ctl_table lasat_root_table[] = {
 258         {
 259                 .procname       = "lasat",
 260                 .mode           =  0555,
 261                 .child          = lasat_table
 262         },
 263         {}
 264 };
 265
 266 static int __init lasat_register_sysctl(void)
 267 {
 268         struct ctl_table_header *lasat_table_header;
 269
 270         lasat_table_header =
 271                 register_sysctl_table(lasat_root_table);
 272         if (!lasat_table_header) {
 273                 printk(KERN_ERR "Unable to register LASAT sysctl\n");
 274                 return -ENOMEM;
 275         }
 276
 277         return 0;
 278 }
 279
 280 arch_initcall(lasat_register_sysctl);