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-rw-r--r--arch/mips/configs/ip27_defconfig1
-rw-r--r--arch/mips/include/asm/m48t35.h27
-rw-r--r--drivers/char/Kconfig11
-rw-r--r--drivers/char/Makefile1
-rw-r--r--drivers/char/ip27-rtc.c329
5 files changed, 0 insertions, 369 deletions
diff --git a/arch/mips/configs/ip27_defconfig b/arch/mips/configs/ip27_defconfig
index 831d3e5a1ea6..34ea319be94c 100644
--- a/arch/mips/configs/ip27_defconfig
+++ b/arch/mips/configs/ip27_defconfig
@@ -701,7 +701,6 @@ CONFIG_LEGACY_PTY_COUNT=256
701# CONFIG_WATCHDOG is not set 701# CONFIG_WATCHDOG is not set
702CONFIG_HW_RANDOM=m 702CONFIG_HW_RANDOM=m
703# CONFIG_RTC is not set 703# CONFIG_RTC is not set
704CONFIG_SGI_IP27_RTC=y
705# CONFIG_R3964 is not set 704# CONFIG_R3964 is not set
706# CONFIG_APPLICOM is not set 705# CONFIG_APPLICOM is not set
707# CONFIG_DRM is not set 706# CONFIG_DRM is not set
diff --git a/arch/mips/include/asm/m48t35.h b/arch/mips/include/asm/m48t35.h
deleted file mode 100644
index f44852e9a96d..000000000000
--- a/arch/mips/include/asm/m48t35.h
+++ /dev/null
@@ -1,27 +0,0 @@
1/*
2 * Registers for the SGS-Thomson M48T35 Timekeeper RAM chip
3 */
4#ifndef _ASM_M48T35_H
5#define _ASM_M48T35_H
6
7#include <linux/spinlock.h>
8
9extern spinlock_t rtc_lock;
10
11struct m48t35_rtc {
12 volatile u8 pad[0x7ff8]; /* starts at 0x7ff8 */
13 volatile u8 control;
14 volatile u8 sec;
15 volatile u8 min;
16 volatile u8 hour;
17 volatile u8 day;
18 volatile u8 date;
19 volatile u8 month;
20 volatile u8 year;
21};
22
23#define M48T35_RTC_SET 0x80
24#define M48T35_RTC_STOPPED 0x80
25#define M48T35_RTC_READ 0x40
26
27#endif /* _ASM_M48T35_H */
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 9d2c4364550c..43b35d0369d6 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -812,17 +812,6 @@ config JS_RTC
812 To compile this driver as a module, choose M here: the 812 To compile this driver as a module, choose M here: the
813 module will be called js-rtc. 813 module will be called js-rtc.
814 814
815config SGI_IP27_RTC
816 bool "SGI M48T35 RTC support"
817 depends on SGI_IP27
818 help
819 If you say Y here and create a character special file /dev/rtc with
820 major number 10 and minor number 135 using mknod ("man mknod"), you
821 will get access to the real time clock built into your computer.
822 Every SGI has such a clock built in. It reports status information
823 via the file /proc/rtc and its behaviour is set by various ioctls on
824 /dev/rtc.
825
826config GEN_RTC 815config GEN_RTC
827 tristate "Generic /dev/rtc emulation" 816 tristate "Generic /dev/rtc emulation"
828 depends on RTC!=y && !IA64 && !ARM && !M32R && !MIPS && !SPARC && !FRV && !S390 && !SUPERH && !AVR32 817 depends on RTC!=y && !IA64 && !ARM && !M32R && !MIPS && !SPARC && !FRV && !S390 && !SUPERH && !AVR32
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 917f0f4faf79..438f71317c5c 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -74,7 +74,6 @@ obj-$(CONFIG_RTC) += rtc.o
74obj-$(CONFIG_HPET) += hpet.o 74obj-$(CONFIG_HPET) += hpet.o
75obj-$(CONFIG_GEN_RTC) += genrtc.o 75obj-$(CONFIG_GEN_RTC) += genrtc.o
76obj-$(CONFIG_EFI_RTC) += efirtc.o 76obj-$(CONFIG_EFI_RTC) += efirtc.o
77obj-$(CONFIG_SGI_IP27_RTC) += ip27-rtc.o
78obj-$(CONFIG_DS1302) += ds1302.o 77obj-$(CONFIG_DS1302) += ds1302.o
79obj-$(CONFIG_XILINX_HWICAP) += xilinx_hwicap/ 78obj-$(CONFIG_XILINX_HWICAP) += xilinx_hwicap/
80ifeq ($(CONFIG_GENERIC_NVRAM),y) 79ifeq ($(CONFIG_GENERIC_NVRAM),y)
diff --git a/drivers/char/ip27-rtc.c b/drivers/char/ip27-rtc.c
deleted file mode 100644
index 2abd881b4cbc..000000000000
--- a/drivers/char/ip27-rtc.c
+++ /dev/null
@@ -1,329 +0,0 @@
1/*
2 * Driver for the SGS-Thomson M48T35 Timekeeper RAM chip
3 *
4 * Real Time Clock interface for Linux
5 *
6 * TODO: Implement periodic interrupts.
7 *
8 * Copyright (C) 2000 Silicon Graphics, Inc.
9 * Written by Ulf Carlsson (ulfc@engr.sgi.com)
10 *
11 * Based on code written by Paul Gortmaker.
12 *
13 * This driver allows use of the real time clock (built into
14 * nearly all computers) from user space. It exports the /dev/rtc
15 * interface supporting various ioctl() and also the /proc/rtc
16 * pseudo-file for status information.
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
22 *
23 */
24
25#define RTC_VERSION "1.09b"
26
27#include <linux/bcd.h>
28#include <linux/module.h>
29#include <linux/kernel.h>
30#include <linux/smp_lock.h>
31#include <linux/types.h>
32#include <linux/miscdevice.h>
33#include <linux/ioport.h>
34#include <linux/fcntl.h>
35#include <linux/rtc.h>
36#include <linux/init.h>
37#include <linux/poll.h>
38#include <linux/proc_fs.h>
39
40#include <asm/m48t35.h>
41#include <asm/sn/ioc3.h>
42#include <asm/io.h>
43#include <asm/uaccess.h>
44#include <asm/system.h>
45#include <asm/sn/klconfig.h>
46#include <asm/sn/sn0/ip27.h>
47#include <asm/sn/sn0/hub.h>
48#include <asm/sn/sn_private.h>
49
50static long rtc_ioctl(struct file *filp, unsigned int cmd,
51 unsigned long arg);
52
53static int rtc_read_proc(char *page, char **start, off_t off,
54 int count, int *eof, void *data);
55
56static void get_rtc_time(struct rtc_time *rtc_tm);
57
58/*
59 * Bits in rtc_status. (6 bits of room for future expansion)
60 */
61
62#define RTC_IS_OPEN 0x01 /* means /dev/rtc is in use */
63#define RTC_TIMER_ON 0x02 /* missed irq timer active */
64
65static unsigned char rtc_status; /* bitmapped status byte. */
66static unsigned long rtc_freq; /* Current periodic IRQ rate */
67static struct m48t35_rtc *rtc;
68
69/*
70 * If this driver ever becomes modularised, it will be really nice
71 * to make the epoch retain its value across module reload...
72 */
73
74static unsigned long epoch = 1970; /* year corresponding to 0x00 */
75
76static const unsigned char days_in_mo[] =
77{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
78
79static long rtc_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
80{
81
82 struct rtc_time wtime;
83
84 switch (cmd) {
85 case RTC_RD_TIME: /* Read the time/date from RTC */
86 {
87 get_rtc_time(&wtime);
88 break;
89 }
90 case RTC_SET_TIME: /* Set the RTC */
91 {
92 struct rtc_time rtc_tm;
93 unsigned char mon, day, hrs, min, sec, leap_yr;
94 unsigned int yrs;
95
96 if (!capable(CAP_SYS_TIME))
97 return -EACCES;
98
99 if (copy_from_user(&rtc_tm, (struct rtc_time*)arg,
100 sizeof(struct rtc_time)))
101 return -EFAULT;
102
103 yrs = rtc_tm.tm_year + 1900;
104 mon = rtc_tm.tm_mon + 1; /* tm_mon starts at zero */
105 day = rtc_tm.tm_mday;
106 hrs = rtc_tm.tm_hour;
107 min = rtc_tm.tm_min;
108 sec = rtc_tm.tm_sec;
109
110 if (yrs < 1970)
111 return -EINVAL;
112
113 leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
114
115 if ((mon > 12) || (day == 0))
116 return -EINVAL;
117
118 if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
119 return -EINVAL;
120
121 if ((hrs >= 24) || (min >= 60) || (sec >= 60))
122 return -EINVAL;
123
124 if ((yrs -= epoch) > 255) /* They are unsigned */
125 return -EINVAL;
126
127 if (yrs > 169)
128 return -EINVAL;
129
130 if (yrs >= 100)
131 yrs -= 100;
132
133 sec = bin2bcd(sec);
134 min = bin2bcd(min);
135 hrs = bin2bcd(hrs);
136 day = bin2bcd(day);
137 mon = bin2bcd(mon);
138 yrs = bin2bcd(yrs);
139
140 spin_lock_irq(&rtc_lock);
141 rtc->control |= M48T35_RTC_SET;
142 rtc->year = yrs;
143 rtc->month = mon;
144 rtc->date = day;
145 rtc->hour = hrs;
146 rtc->min = min;
147 rtc->sec = sec;
148 rtc->control &= ~M48T35_RTC_SET;
149 spin_unlock_irq(&rtc_lock);
150
151 return 0;
152 }
153 default:
154 return -EINVAL;
155 }
156 return copy_to_user((void *)arg, &wtime, sizeof wtime) ? -EFAULT : 0;
157}
158
159/*
160 * We enforce only one user at a time here with the open/close.
161 * Also clear the previous interrupt data on an open, and clean
162 * up things on a close.
163 */
164
165static int rtc_open(struct inode *inode, struct file *file)
166{
167 lock_kernel();
168 spin_lock_irq(&rtc_lock);
169
170 if (rtc_status & RTC_IS_OPEN) {
171 spin_unlock_irq(&rtc_lock);
172 unlock_kernel();
173 return -EBUSY;
174 }
175
176 rtc_status |= RTC_IS_OPEN;
177 spin_unlock_irq(&rtc_lock);
178 unlock_kernel();
179
180 return 0;
181}
182
183static int rtc_release(struct inode *inode, struct file *file)
184{
185 /*
186 * Turn off all interrupts once the device is no longer
187 * in use, and clear the data.
188 */
189
190 spin_lock_irq(&rtc_lock);
191 rtc_status &= ~RTC_IS_OPEN;
192 spin_unlock_irq(&rtc_lock);
193
194 return 0;
195}
196
197/*
198 * The various file operations we support.
199 */
200
201static const struct file_operations rtc_fops = {
202 .owner = THIS_MODULE,
203 .unlocked_ioctl = rtc_ioctl,
204 .open = rtc_open,
205 .release = rtc_release,
206};
207
208static struct miscdevice rtc_dev=
209{
210 RTC_MINOR,
211 "rtc",
212 &rtc_fops
213};
214
215static int __init rtc_init(void)
216{
217 rtc = (struct m48t35_rtc *)
218 (KL_CONFIG_CH_CONS_INFO(master_nasid)->memory_base + IOC3_BYTEBUS_DEV0);
219
220 printk(KERN_INFO "Real Time Clock Driver v%s\n", RTC_VERSION);
221 if (misc_register(&rtc_dev)) {
222 printk(KERN_ERR "rtc: cannot register misc device.\n");
223 return -ENODEV;
224 }
225 if (!create_proc_read_entry("driver/rtc", 0, NULL, rtc_read_proc, NULL)) {
226 printk(KERN_ERR "rtc: cannot create /proc/rtc.\n");
227 misc_deregister(&rtc_dev);
228 return -ENOENT;
229 }
230
231 rtc_freq = 1024;
232
233 return 0;
234}
235
236static void __exit rtc_exit (void)
237{
238 /* interrupts and timer disabled at this point by rtc_release */
239
240 remove_proc_entry ("rtc", NULL);
241 misc_deregister(&rtc_dev);
242}
243
244module_init(rtc_init);
245module_exit(rtc_exit);
246
247/*
248 * Info exported via "/proc/rtc".
249 */
250
251static int rtc_get_status(char *buf)
252{
253 char *p;
254 struct rtc_time tm;
255
256 /*
257 * Just emulate the standard /proc/rtc
258 */
259
260 p = buf;
261
262 get_rtc_time(&tm);
263
264 /*
265 * There is no way to tell if the luser has the RTC set for local
266 * time or for Universal Standard Time (GMT). Probably local though.
267 */
268 p += sprintf(p,
269 "rtc_time\t: %02d:%02d:%02d\n"
270 "rtc_date\t: %04d-%02d-%02d\n"
271 "rtc_epoch\t: %04lu\n"
272 "24hr\t\t: yes\n",
273 tm.tm_hour, tm.tm_min, tm.tm_sec,
274 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, epoch);
275
276 return p - buf;
277}
278
279static int rtc_read_proc(char *page, char **start, off_t off,
280 int count, int *eof, void *data)
281{
282 int len = rtc_get_status(page);
283 if (len <= off+count) *eof = 1;
284 *start = page + off;
285 len -= off;
286 if (len>count) len = count;
287 if (len<0) len = 0;
288 return len;
289}
290
291static void get_rtc_time(struct rtc_time *rtc_tm)
292{
293 /*
294 * Do we need to wait for the last update to finish?
295 */
296
297 /*
298 * Only the values that we read from the RTC are set. We leave
299 * tm_wday, tm_yday and tm_isdst untouched. Even though the
300 * RTC has RTC_DAY_OF_WEEK, we ignore it, as it is only updated
301 * by the RTC when initially set to a non-zero value.
302 */
303 spin_lock_irq(&rtc_lock);
304 rtc->control |= M48T35_RTC_READ;
305 rtc_tm->tm_sec = rtc->sec;
306 rtc_tm->tm_min = rtc->min;
307 rtc_tm->tm_hour = rtc->hour;
308 rtc_tm->tm_mday = rtc->date;
309 rtc_tm->tm_mon = rtc->month;
310 rtc_tm->tm_year = rtc->year;
311 rtc->control &= ~M48T35_RTC_READ;
312 spin_unlock_irq(&rtc_lock);
313
314 rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
315 rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
316 rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
317 rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
318 rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
319 rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
320
321 /*
322 * Account for differences between how the RTC uses the values
323 * and how they are defined in a struct rtc_time;
324 */
325 if ((rtc_tm->tm_year += (epoch - 1900)) <= 69)
326 rtc_tm->tm_year += 100;
327
328 rtc_tm->tm_mon--;
329}
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