GNU Linux-libre 4.19.286-gnu1
[releases.git] / 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);