arch/mips/lasat/sysctl.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Thomas Horsten <thh@lasat.com>
   4  * Copyright (C) 2000 LASAT Networks A/S.
   5  *
   6  * Routines specific to the LASAT boards
   7  */
   8 #include <linux/types.h>
   9 #include <asm/lasat/lasat.h>
  10
  11 #include <linux/sysctl.h>
  12 #include <linux/stddef.h>
  13 #include <linux/init.h>
  14 #include <linux/fs.h>
  15 #include <linux/ctype.h>
  16 #include <linux/string.h>
  17 #include <linux/net.h>
  18 #include <linux/inet.h>
  19 #include <linux/uaccess.h>
  20
  21 #include <asm/time.h>
  22
  23 #ifdef CONFIG_DS1603
  24 #include "ds1603.h"
  25 #endif
  26
  27
  28 /* And the same for proc */
  29 int proc_dolasatstring(struct ctl_table *table, int write,
  30                        void *buffer, size_t *lenp, loff_t *ppos)
  31 {
  32         int r;
  33
  34         r = proc_dostring(table, write, buffer, lenp, ppos);
  35         if ((!write) || r)
  36                 return r;
  37
  38         lasat_write_eeprom_info();
  39
  40         return 0;
  41 }
  42
  43 #ifdef CONFIG_DS1603
  44 static int rtctmp;
  45
  46 /* proc function to read/write RealTime Clock */
  47 int proc_dolasatrtc(struct ctl_table *table, int write,
  48                        void *buffer, size_t *lenp, loff_t *ppos)
  49 {
  50         struct timespec64 ts;
  51         int r;
  52
  53         if (!write) {
  54                 read_persistent_clock64(&ts);
  55                 rtctmp = ts.tv_sec;
  56                 /* check for time < 0 and set to 0 */
  57                 if (rtctmp < 0)
  58                         rtctmp = 0;
  59         }
  60         r = proc_dointvec(table, write, buffer, lenp, ppos);
  61         if (r)
  62                 return r;
  63
  64         if (write) {
  65                 /*
  66                  * Due to the RTC hardware limitation, we can not actually
  67                  * use the full 64-bit range here.
  68                  */
  69                 ts.tv_sec = rtctmp;
  70                 ts.tv_nsec = 0;
  71
  72                 update_persistent_clock64(ts);
  73         }
  74
  75         return 0;
  76 }
  77 #endif
  78
  79 #ifdef CONFIG_INET
  80 int proc_lasat_ip(struct ctl_table *table, int write,
  81                        void *buffer, size_t *lenp, loff_t *ppos)
  82 {
  83         unsigned int ip;
  84         char *p, c;
  85         int len;
  86         char ipbuf[32];
  87
  88         if (!table->data || !table->maxlen || !*lenp ||
  89             (*ppos && !write)) {
  90                 *lenp = 0;
  91                 return 0;
  92         }
  93
  94         if (write) {
  95                 len = 0;
  96                 p = buffer;
  97                 while (len < *lenp) {
  98                         c = *p;
  99                         p++;
 100                         if (c == 0 || c == '\n')
 101                                 break;
 102                         len++;
 103                 }
 104                 if (len >= sizeof(ipbuf)-1)
 105                         len = sizeof(ipbuf) - 1;
 106                 memcpy(ipbuf, buffer, len);
 107                 ipbuf[len] = 0;
 108                 *ppos += *lenp;
 109                 /* Now see if we can convert it to a valid IP */
 110                 ip = in_aton(ipbuf);
 111                 *(unsigned int *)(table->data) = ip;
 112                 lasat_write_eeprom_info();
 113         } else {
 114                 ip = *(unsigned int *)(table->data);
 115                 sprintf(ipbuf, "%d.%d.%d.%d",
 116                         (ip)       & 0xff,
 117                         (ip >>  8) & 0xff,
 118                         (ip >> 16) & 0xff,
 119                         (ip >> 24) & 0xff);
 120                 len = strlen(ipbuf);
 121                 if (len > *lenp)
 122                         len = *lenp;
 123                 if (len)
 124                         memcpy(buffer, ipbuf, len);
 125                 if (len < *lenp) {
 126                         *((char *)buffer + len) = '\n';
 127                         len++;
 128                 }
 129                 *lenp = len;
 130                 *ppos += len;
 131         }
 132
 133         return 0;
 134 }
 135 #endif
 136
 137 int proc_lasat_prid(struct ctl_table *table, int write,
 138                        void *buffer, size_t *lenp, loff_t *ppos)
 139 {
 140         int r;
 141
 142         r = proc_dointvec(table, write, buffer, lenp, ppos);
 143         if (r < 0)
 144                 return r;
 145         if (write) {
 146                 lasat_board_info.li_eeprom_info.prid =
 147                         lasat_board_info.li_prid;
 148                 lasat_write_eeprom_info();
 149                 lasat_init_board_info();
 150         }
 151         return 0;
 152 }
 153
 154 extern int lasat_boot_to_service;
 155
 156 static struct ctl_table lasat_table[] = {
 157         {
 158                 .procname       = "cpu-hz",
 159                 .data           = &lasat_board_info.li_cpu_hz,
 160                 .maxlen         = sizeof(int),
 161                 .mode           = 0444,
 162                 .proc_handler   = proc_dointvec,
 163         },
 164         {
 165                 .procname       = "bus-hz",
 166                 .data           = &lasat_board_info.li_bus_hz,
 167                 .maxlen         = sizeof(int),
 168                 .mode           = 0444,
 169                 .proc_handler   = proc_dointvec,
 170         },
 171         {
 172                 .procname       = "bmid",
 173                 .data           = &lasat_board_info.li_bmid,
 174                 .maxlen         = sizeof(int),
 175                 .mode           = 0444,
 176                 .proc_handler   = proc_dointvec,
 177         },
 178         {
 179                 .procname       = "prid",
 180                 .data           = &lasat_board_info.li_prid,
 181                 .maxlen         = sizeof(int),
 182                 .mode           = 0644,
 183                 .proc_handler   = proc_lasat_prid,
 184         },
 185 #ifdef CONFIG_INET
 186         {
 187                 .procname       = "ipaddr",
 188                 .data           = &lasat_board_info.li_eeprom_info.ipaddr,
 189                 .maxlen         = sizeof(int),
 190                 .mode           = 0644,
 191                 .proc_handler   = proc_lasat_ip,
 192         },
 193         {
 194                 .procname       = "netmask",
 195                 .data           = &lasat_board_info.li_eeprom_info.netmask,
 196                 .maxlen         = sizeof(int),
 197                 .mode           = 0644,
 198                 .proc_handler   = proc_lasat_ip,
 199         },
 200 #endif
 201         {
 202                 .procname       = "passwd_hash",
 203                 .data           = &lasat_board_info.li_eeprom_info.passwd_hash,
 204                 .maxlen         =
 205                         sizeof(lasat_board_info.li_eeprom_info.passwd_hash),
 206                 .mode           = 0600,
 207                 .proc_handler   = proc_dolasatstring,
 208         },
 209         {
 210                 .procname       = "boot-service",
 211                 .data           = &lasat_boot_to_service,
 212                 .maxlen         = sizeof(int),
 213                 .mode           = 0644,
 214                 .proc_handler   = proc_dointvec,
 215         },
 216 #ifdef CONFIG_DS1603
 217         {
 218                 .procname       = "rtc",
 219                 .data           = &rtctmp,
 220                 .maxlen         = sizeof(int),
 221                 .mode           = 0644,
 222                 .proc_handler   = proc_dolasatrtc,
 223         },
 224 #endif
 225         {
 226                 .procname       = "namestr",
 227                 .data           = &lasat_board_info.li_namestr,
 228                 .maxlen         = sizeof(lasat_board_info.li_namestr),
 229                 .mode           = 0444,
 230                 .proc_handler   = proc_dostring,
 231         },
 232         {
 233                 .procname       = "typestr",
 234                 .data           = &lasat_board_info.li_typestr,
 235                 .maxlen         = sizeof(lasat_board_info.li_typestr),
 236                 .mode           = 0444,
 237                 .proc_handler   = proc_dostring,
 238         },
 239         {}
 240 };
 241
 242 static struct ctl_table lasat_root_table[] = {
 243         {
 244                 .procname       = "lasat",
 245                 .mode           =  0555,
 246                 .child          = lasat_table
 247         },
 248         {}
 249 };
 250
 251 static int __init lasat_register_sysctl(void)
 252 {
 253         struct ctl_table_header *lasat_table_header;
 254
 255         lasat_table_header =
 256                 register_sysctl_table(lasat_root_table);
 257         if (!lasat_table_header) {
 258                 printk(KERN_ERR "Unable to register LASAT sysctl\n");
 259                 return -ENOMEM;
 260         }
 261
 262         return 0;
 263 }
 264
 265 arch_initcall(lasat_register_sysctl);