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                         if (get_user(c, p++))
  99                                 return -EFAULT;
 100                         if (c == 0 || c == '\n')
 101                                 break;
 102                         len++;
 103                 }
 104                 if (len >= sizeof(ipbuf)-1)
 105                         len = sizeof(ipbuf) - 1;
 106                 if (copy_from_user(ipbuf, buffer, len))
 107                         return -EFAULT;
 108                 ipbuf[len] = 0;
 109                 *ppos += *lenp;
 110                 /* Now see if we can convert it to a valid IP */
 111                 ip = in_aton(ipbuf);
 112                 *(unsigned int *)(table->data) = ip;
 113                 lasat_write_eeprom_info();
 114         } else {
 115                 ip = *(unsigned int *)(table->data);
 116                 sprintf(ipbuf, "%d.%d.%d.%d",
 117                         (ip)       & 0xff,
 118                         (ip >>  8) & 0xff,
 119                         (ip >> 16) & 0xff,
 120                         (ip >> 24) & 0xff);
 121                 len = strlen(ipbuf);
 122                 if (len > *lenp)
 123                         len = *lenp;
 124                 if (len)
 125                         if (copy_to_user(buffer, ipbuf, len))
 126                                 return -EFAULT;
 127                 if (len < *lenp) {
 128                         if (put_user('\n', ((char *) buffer) + len))
 129                                 return -EFAULT;
 130                         len++;
 131                 }
 132                 *lenp = len;
 133                 *ppos += len;
 134         }
 135
 136         return 0;
 137 }
 138 #endif
 139
 140 int proc_lasat_prid(struct ctl_table *table, int write,
 141                        void *buffer, size_t *lenp, loff_t *ppos)
 142 {
 143         int r;
 144
 145         r = proc_dointvec(table, write, buffer, lenp, ppos);
 146         if (r < 0)
 147                 return r;
 148         if (write) {
 149                 lasat_board_info.li_eeprom_info.prid =
 150                         lasat_board_info.li_prid;
 151                 lasat_write_eeprom_info();
 152                 lasat_init_board_info();
 153         }
 154         return 0;
 155 }
 156
 157 extern int lasat_boot_to_service;
 158
 159 static struct ctl_table lasat_table[] = {
 160         {
 161                 .procname       = "cpu-hz",
 162                 .data           = &lasat_board_info.li_cpu_hz,
 163                 .maxlen         = sizeof(int),
 164                 .mode           = 0444,
 165                 .proc_handler   = proc_dointvec,
 166         },
 167         {
 168                 .procname       = "bus-hz",
 169                 .data           = &lasat_board_info.li_bus_hz,
 170                 .maxlen         = sizeof(int),
 171                 .mode           = 0444,
 172                 .proc_handler   = proc_dointvec,
 173         },
 174         {
 175                 .procname       = "bmid",
 176                 .data           = &lasat_board_info.li_bmid,
 177                 .maxlen         = sizeof(int),
 178                 .mode           = 0444,
 179                 .proc_handler   = proc_dointvec,
 180         },
 181         {
 182                 .procname       = "prid",
 183                 .data           = &lasat_board_info.li_prid,
 184                 .maxlen         = sizeof(int),
 185                 .mode           = 0644,
 186                 .proc_handler   = proc_lasat_prid,
 187         },
 188 #ifdef CONFIG_INET
 189         {
 190                 .procname       = "ipaddr",
 191                 .data           = &lasat_board_info.li_eeprom_info.ipaddr,
 192                 .maxlen         = sizeof(int),
 193                 .mode           = 0644,
 194                 .proc_handler   = proc_lasat_ip,
 195         },
 196         {
 197                 .procname       = "netmask",
 198                 .data           = &lasat_board_info.li_eeprom_info.netmask,
 199                 .maxlen         = sizeof(int),
 200                 .mode           = 0644,
 201                 .proc_handler   = proc_lasat_ip,
 202         },
 203 #endif
 204         {
 205                 .procname       = "passwd_hash",
 206                 .data           = &lasat_board_info.li_eeprom_info.passwd_hash,
 207                 .maxlen         =
 208                         sizeof(lasat_board_info.li_eeprom_info.passwd_hash),
 209                 .mode           = 0600,
 210                 .proc_handler   = proc_dolasatstring,
 211         },
 212         {
 213                 .procname       = "boot-service",
 214                 .data           = &lasat_boot_to_service,
 215                 .maxlen         = sizeof(int),
 216                 .mode           = 0644,
 217                 .proc_handler   = proc_dointvec,
 218         },
 219 #ifdef CONFIG_DS1603
 220         {
 221                 .procname       = "rtc",
 222                 .data           = &rtctmp,
 223                 .maxlen         = sizeof(int),
 224                 .mode           = 0644,
 225                 .proc_handler   = proc_dolasatrtc,
 226         },
 227 #endif
 228         {
 229                 .procname       = "namestr",
 230                 .data           = &lasat_board_info.li_namestr,
 231                 .maxlen         = sizeof(lasat_board_info.li_namestr),
 232                 .mode           = 0444,
 233                 .proc_handler   = proc_dostring,
 234         },
 235         {
 236                 .procname       = "typestr",
 237                 .data           = &lasat_board_info.li_typestr,
 238                 .maxlen         = sizeof(lasat_board_info.li_typestr),
 239                 .mode           = 0444,
 240                 .proc_handler   = proc_dostring,
 241         },
 242         {}
 243 };
 244
 245 static struct ctl_table lasat_root_table[] = {
 246         {
 247                 .procname       = "lasat",
 248                 .mode           =  0555,
 249                 .child          = lasat_table
 250         },
 251         {}
 252 };
 253
 254 static int __init lasat_register_sysctl(void)
 255 {
 256         struct ctl_table_header *lasat_table_header;
 257
 258         lasat_table_header =
 259                 register_sysctl_table(lasat_root_table);
 260         if (!lasat_table_header) {
 261                 printk(KERN_ERR "Unable to register LASAT sysctl\n");
 262                 return -ENOMEM;
 263         }
 264
 265         return 0;
 266 }
 267
 268 arch_initcall(lasat_register_sysctl);