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authorJesper Nilsson <jespern@axis.com>2012-04-05 05:52:55 -0400
committerJesper Nilsson <jespern@axis.com>2012-04-05 05:55:58 -0400
commit9c75fc8c5c8c50775fc8b89418219221335b758f (patch)
treef294827eb9e5532f77a55fdcbdd9dbaec500b93d
parent4d5914d628360c607dc426ccb1acaf23909ac546 (diff)
CRIS: Remove legacy RTC drivers
These old drivers are not used anymore, we use the ones in drivers/rtc. This allows us to remove some cruft in the CRIS timekeeping code. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Diffstat
-rw-r--r--arch/cris/arch-v10/drivers/ds1302.c515
-rw-r--r--arch/cris/arch-v10/drivers/pcf8563.c380
-rw-r--r--arch/cris/arch-v10/kernel/fasttimer.c2
-rw-r--r--arch/cris/arch-v10/kernel/time.c9
-rw-r--r--arch/cris/arch-v32/kernel/time.c7
-rw-r--r--arch/cris/include/asm/Kbuild1
-rw-r--r--arch/cris/include/asm/rtc.h107
-rw-r--r--arch/cris/kernel/time.c76
8 files changed, 7 insertions, 1090 deletions
diff --git a/arch/cris/arch-v10/drivers/ds1302.c b/arch/cris/arch-v10/drivers/ds1302.c
deleted file mode 100644
index 74f99c688c8..00000000000
--- a/arch/cris/arch-v10/drivers/ds1302.c
+++ /dev/null
@@ -1,515 +0,0 @@
1/*!***************************************************************************
2*!
3*! FILE NAME : ds1302.c
4*!
5*! DESCRIPTION: Implements an interface for the DS1302 RTC through Etrax I/O
6*!
7*! Functions exported: ds1302_readreg, ds1302_writereg, ds1302_init
8*!
9*! ---------------------------------------------------------------------------
10*!
11*! (C) Copyright 1999-2007 Axis Communications AB, LUND, SWEDEN
12*!
13*!***************************************************************************/
14
15
16#include <linux/fs.h>
17#include <linux/init.h>
18#include <linux/mm.h>
19#include <linux/module.h>
20#include <linux/miscdevice.h>
21#include <linux/delay.h>
22#include <linux/mutex.h>
23#include <linux/bcd.h>
24#include <linux/capability.h>
25
26#include <asm/uaccess.h>
27#include <arch/svinto.h>
28#include <asm/io.h>
29#include <asm/rtc.h>
30#include <arch/io_interface_mux.h>
31
32#include "i2c.h"
33
34#define RTC_MAJOR_NR 121 /* local major, change later */
35
36static DEFINE_MUTEX(ds1302_mutex);
37static const char ds1302_name[] = "ds1302";
38
39/* The DS1302 might be connected to different bits on different products.
40 * It has three signals - SDA, SCL and RST. RST and SCL are always outputs,
41 * but SDA can have a selected direction.
42 * For now, only PORT_PB is hardcoded.
43 */
44
45/* The RST bit may be on either the Generic Port or Port PB. */
46#ifdef CONFIG_ETRAX_DS1302_RST_ON_GENERIC_PORT
47#define TK_RST_OUT(x) REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow, CONFIG_ETRAX_DS1302_RSTBIT, x)
48#define TK_RST_DIR(x)
49#else
50#define TK_RST_OUT(x) REG_SHADOW_SET(R_PORT_PB_DATA, port_pb_data_shadow, CONFIG_ETRAX_DS1302_RSTBIT, x)
51#define TK_RST_DIR(x) REG_SHADOW_SET(R_PORT_PB_DIR, port_pb_dir_shadow, CONFIG_ETRAX_DS1302_RSTBIT, x)
52#endif
53
54
55#define TK_SDA_OUT(x) REG_SHADOW_SET(R_PORT_PB_DATA, port_pb_data_shadow, CONFIG_ETRAX_DS1302_SDABIT, x)
56#define TK_SCL_OUT(x) REG_SHADOW_SET(R_PORT_PB_DATA, port_pb_data_shadow, CONFIG_ETRAX_DS1302_SCLBIT, x)
57
58#define TK_SDA_IN() ((*R_PORT_PB_READ >> CONFIG_ETRAX_DS1302_SDABIT) & 1)
59/* 1 is out, 0 is in */
60#define TK_SDA_DIR(x) REG_SHADOW_SET(R_PORT_PB_DIR, port_pb_dir_shadow, CONFIG_ETRAX_DS1302_SDABIT, x)
61#define TK_SCL_DIR(x) REG_SHADOW_SET(R_PORT_PB_DIR, port_pb_dir_shadow, CONFIG_ETRAX_DS1302_SCLBIT, x)
62
63
64/*
65 * The reason for tempudelay and not udelay is that loops_per_usec
66 * (used in udelay) is not set when functions here are called from time.c
67 */
68
69static void tempudelay(int usecs)
70{
71 volatile int loops;
72
73 for(loops = usecs * 12; loops > 0; loops--)
74 /* nothing */;
75}
76
77
78/* Send 8 bits. */
79static void
80out_byte(unsigned char x)
81{
82 int i;
83 TK_SDA_DIR(1);
84 for (i = 8; i--;) {
85 /* The chip latches incoming bits on the rising edge of SCL. */
86 TK_SCL_OUT(0);
87 TK_SDA_OUT(x & 1);
88 tempudelay(1);
89 TK_SCL_OUT(1);
90 tempudelay(1);
91 x >>= 1;
92 }
93 TK_SDA_DIR(0);
94}
95
96static unsigned char
97in_byte(void)
98{
99 unsigned char x = 0;
100 int i;
101
102 /* Read byte. Bits come LSB first, on the falling edge of SCL.
103 * Assume SDA is in input direction already.
104 */
105 TK_SDA_DIR(0);
106
107 for (i = 8; i--;) {
108 TK_SCL_OUT(0);
109 tempudelay(1);
110 x >>= 1;
111 x |= (TK_SDA_IN() << 7);
112 TK_SCL_OUT(1);
113 tempudelay(1);
114 }
115
116 return x;
117}
118
119/* Prepares for a transaction by de-activating RST (active-low). */
120
121static void
122start(void)
123{
124 TK_SCL_OUT(0);
125 tempudelay(1);
126 TK_RST_OUT(0);
127 tempudelay(5);
128 TK_RST_OUT(1);
129}
130
131/* Ends a transaction by taking RST active again. */
132
133static void
134stop(void)
135{
136 tempudelay(2);
137 TK_RST_OUT(0);
138}
139
140/* Enable writing. */
141
142static void
143ds1302_wenable(void)
144{
145 start();
146 out_byte(0x8e); /* Write control register */
147 out_byte(0x00); /* Disable write protect bit 7 = 0 */
148 stop();
149}
150
151/* Disable writing. */
152
153static void
154ds1302_wdisable(void)
155{
156 start();
157 out_byte(0x8e); /* Write control register */
158 out_byte(0x80); /* Disable write protect bit 7 = 0 */
159 stop();
160}
161
162
163
164/* Read a byte from the selected register in the DS1302. */
165
166unsigned char
167ds1302_readreg(int reg)
168{
169 unsigned char x;
170
171 start();
172 out_byte(0x81 | (reg << 1)); /* read register */
173 x = in_byte();
174 stop();
175
176 return x;
177}
178
179/* Write a byte to the selected register. */
180
181void
182ds1302_writereg(int reg, unsigned char val)
183{
184#ifndef CONFIG_ETRAX_RTC_READONLY
185 int do_writereg = 1;
186#else
187 int do_writereg = 0;
188
189 if (reg == RTC_TRICKLECHARGER)
190 do_writereg = 1;
191#endif
192
193 if (do_writereg) {
194 ds1302_wenable();
195 start();
196 out_byte(0x80 | (reg << 1)); /* write register */
197 out_byte(val);
198 stop();
199 ds1302_wdisable();
200 }
201}
202
203void
204get_rtc_time(struct rtc_time *rtc_tm)
205{
206 unsigned long flags;
207
208 local_irq_save(flags);
209
210 rtc_tm->tm_sec = CMOS_READ(RTC_SECONDS);
211 rtc_tm->tm_min = CMOS_READ(RTC_MINUTES);
212 rtc_tm->tm_hour = CMOS_READ(RTC_HOURS);
213 rtc_tm->tm_mday = CMOS_READ(RTC_DAY_OF_MONTH);
214 rtc_tm->tm_mon = CMOS_READ(RTC_MONTH);
215 rtc_tm->tm_year = CMOS_READ(RTC_YEAR);
216
217 local_irq_restore(flags);
218
219 rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
220 rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
221 rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
222 rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
223 rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
224 rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
225
226 /*
227 * Account for differences between how the RTC uses the values
228 * and how they are defined in a struct rtc_time;
229 */
230
231 if (rtc_tm->tm_year <= 69)
232 rtc_tm->tm_year += 100;
233
234 rtc_tm->tm_mon--;
235}
236
237static unsigned char days_in_mo[] =
238 {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
239
240/* ioctl that supports RTC_RD_TIME and RTC_SET_TIME (read and set time/date). */
241
242static int rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
243{
244 unsigned long flags;
245
246 switch(cmd) {
247 case RTC_RD_TIME: /* read the time/date from RTC */
248 {
249 struct rtc_time rtc_tm;
250
251 memset(&rtc_tm, 0, sizeof (struct rtc_time));
252 get_rtc_time(&rtc_tm);
253 if (copy_to_user((struct rtc_time*)arg, &rtc_tm, sizeof(struct rtc_time)))
254 return -EFAULT;
255 return 0;
256 }
257
258 case RTC_SET_TIME: /* set the RTC */
259 {
260 struct rtc_time rtc_tm;
261 unsigned char mon, day, hrs, min, sec, leap_yr;
262 unsigned int yrs;
263
264 if (!capable(CAP_SYS_TIME))
265 return -EPERM;
266
267 if (copy_from_user(&rtc_tm, (struct rtc_time*)arg, sizeof(struct rtc_time)))
268 return -EFAULT;
269
270 yrs = rtc_tm.tm_year + 1900;
271 mon = rtc_tm.tm_mon + 1; /* tm_mon starts at zero */
272 day = rtc_tm.tm_mday;
273 hrs = rtc_tm.tm_hour;
274 min = rtc_tm.tm_min;
275 sec = rtc_tm.tm_sec;
276
277
278 if ((yrs < 1970) || (yrs > 2069))
279 return -EINVAL;
280
281 leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
282
283 if ((mon > 12) || (day == 0))
284 return -EINVAL;
285
286 if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
287 return -EINVAL;
288
289 if ((hrs >= 24) || (min >= 60) || (sec >= 60))
290 return -EINVAL;
291
292 if (yrs >= 2000)
293 yrs -= 2000; /* RTC (0, 1, ... 69) */
294 else
295 yrs -= 1900; /* RTC (70, 71, ... 99) */
296
297 sec = bin2bcd(sec);
298 min = bin2bcd(min);
299 hrs = bin2bcd(hrs);
300 day = bin2bcd(day);
301 mon = bin2bcd(mon);
302 yrs = bin2bcd(yrs);
303
304 local_irq_save(flags);
305 CMOS_WRITE(yrs, RTC_YEAR);
306 CMOS_WRITE(mon, RTC_MONTH);
307 CMOS_WRITE(day, RTC_DAY_OF_MONTH);
308 CMOS_WRITE(hrs, RTC_HOURS);
309 CMOS_WRITE(min, RTC_MINUTES);
310 CMOS_WRITE(sec, RTC_SECONDS);
311 local_irq_restore(flags);
312
313 /* Notice that at this point, the RTC is updated but
314 * the kernel is still running with the old time.
315 * You need to set that separately with settimeofday
316 * or adjtimex.
317 */
318 return 0;
319 }
320
321 case RTC_SET_CHARGE: /* set the RTC TRICKLE CHARGE register */
322 {
323 int tcs_val;
324
325 if (!capable(CAP_SYS_TIME))
326 return -EPERM;
327
328 if(copy_from_user(&tcs_val, (int*)arg, sizeof(int)))
329 return -EFAULT;
330
331 tcs_val = RTC_TCR_PATTERN | (tcs_val & 0x0F);
332 ds1302_writereg(RTC_TRICKLECHARGER, tcs_val);
333 return 0;
334 }
335 case RTC_VL_READ:
336 {
337 /* TODO:
338 * Implement voltage low detection support
339 */
340 printk(KERN_WARNING "DS1302: RTC Voltage Low detection"
341 " is not supported\n");
342 return 0;
343 }
344 case RTC_VL_CLR:
345 {
346 /* TODO:
347 * Nothing to do since Voltage Low detection is not supported
348 */
349 return 0;
350 }
351 default:
352 return -ENOIOCTLCMD;
353 }
354}
355
356static long rtc_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
357{
358 int ret;
359
360 mutex_lock(&ds1302_mutex);
361 ret = rtc_ioctl(file, cmd, arg);
362 mutex_unlock(&ds1302_mutex);
363
364 return ret;
365}
366
367static void
368print_rtc_status(void)
369{
370 struct rtc_time tm;
371
372 get_rtc_time(&tm);
373
374 /*
375 * There is no way to tell if the luser has the RTC set for local
376 * time or for Universal Standard Time (GMT). Probably local though.
377 */
378
379 printk(KERN_INFO "rtc_time\t: %02d:%02d:%02d\n",
380 tm.tm_hour, tm.tm_min, tm.tm_sec);
381 printk(KERN_INFO "rtc_date\t: %04d-%02d-%02d\n",
382 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
383}
384
385/* The various file operations we support. */
386
387static const struct file_operations rtc_fops = {
388 .owner = THIS_MODULE,
389 .unlocked_ioctl = rtc_unlocked_ioctl,
390 .llseek = noop_llseek,
391};
392
393/* Probe for the chip by writing something to its RAM and try reading it back. */
394
395#define MAGIC_PATTERN 0x42
396
397static int __init
398ds1302_probe(void)
399{
400 int retval, res;
401
402 TK_RST_DIR(1);
403 TK_SCL_DIR(1);
404 TK_SDA_DIR(0);
405
406 /* Try to talk to timekeeper. */
407
408 ds1302_wenable();
409 start();
410 out_byte(0xc0); /* write RAM byte 0 */
411 out_byte(MAGIC_PATTERN); /* write something magic */
412 start();
413 out_byte(0xc1); /* read RAM byte 0 */
414
415 if((res = in_byte()) == MAGIC_PATTERN) {
416 stop();
417 ds1302_wdisable();
418 printk(KERN_INFO "%s: RTC found.\n", ds1302_name);
419 printk(KERN_INFO "%s: SDA, SCL, RST on PB%i, PB%i, %s%i\n",
420 ds1302_name,
421 CONFIG_ETRAX_DS1302_SDABIT,
422 CONFIG_ETRAX_DS1302_SCLBIT,
423#ifdef CONFIG_ETRAX_DS1302_RST_ON_GENERIC_PORT
424 "GENIO",
425#else
426 "PB",
427#endif
428 CONFIG_ETRAX_DS1302_RSTBIT);
429 print_rtc_status();
430 retval = 1;
431 } else {
432 stop();
433 retval = 0;
434 }
435
436 return retval;
437}
438
439
440/* Just probe for the RTC and register the device to handle the ioctl needed. */
441
442int __init
443ds1302_init(void)
444{
445#ifdef CONFIG_ETRAX_I2C
446 i2c_init();
447#endif
448
449 if (!ds1302_probe()) {
450#ifdef CONFIG_ETRAX_DS1302_RST_ON_GENERIC_PORT
451#if CONFIG_ETRAX_DS1302_RSTBIT == 27
452 /*
453 * The only way to set g27 to output is to enable ATA.
454 *
455 * Make sure that R_GEN_CONFIG is setup correct.
456 */
457 /* Allocating the ATA interface will grab almost all
458 * pins in I/O groups a, b, c and d. A consequence of
459 * allocating the ATA interface is that the fixed
460 * interfaces shared RAM, parallel port 0, parallel
461 * port 1, parallel port W, SCSI-8 port 0, SCSI-8 port
462 * 1, SCSI-W, serial port 2, serial port 3,
463 * synchronous serial port 3 and USB port 2 and almost
464 * all GPIO pins on port g cannot be used.
465 */
466 if (cris_request_io_interface(if_ata, "ds1302/ATA")) {
467 printk(KERN_WARNING "ds1302: Failed to get IO interface\n");
468 return -1;
469 }
470
471#elif CONFIG_ETRAX_DS1302_RSTBIT == 0
472 if (cris_io_interface_allocate_pins(if_gpio_grp_a,
473 'g',
474 CONFIG_ETRAX_DS1302_RSTBIT,
475 CONFIG_ETRAX_DS1302_RSTBIT)) {
476 printk(KERN_WARNING "ds1302: Failed to get IO interface\n");
477 return -1;
478 }
479
480 /* Set the direction of this bit to out. */
481 genconfig_shadow = ((genconfig_shadow &
482 ~IO_MASK(R_GEN_CONFIG, g0dir)) |
483 (IO_STATE(R_GEN_CONFIG, g0dir, out)));
484 *R_GEN_CONFIG = genconfig_shadow;
485#endif
486 if (!ds1302_probe()) {
487 printk(KERN_WARNING "%s: RTC not found.\n", ds1302_name);
488 return -1;
489 }
490#else
491 printk(KERN_WARNING "%s: RTC not found.\n", ds1302_name);
492 return -1;
493#endif
494 }
495 /* Initialise trickle charger */
496 ds1302_writereg(RTC_TRICKLECHARGER,
497 RTC_TCR_PATTERN |(CONFIG_ETRAX_DS1302_TRICKLE_CHARGE & 0x0F));
498 /* Start clock by resetting CLOCK_HALT */
499 ds1302_writereg(RTC_SECONDS, (ds1302_readreg(RTC_SECONDS) & 0x7F));
500 return 0;
501}
502
503static int __init ds1302_register(void)
504{
505 ds1302_init();
506 if (register_chrdev(RTC_MAJOR_NR, ds1302_name, &rtc_fops)) {
507 printk(KERN_INFO "%s: unable to get major %d for rtc\n",
508 ds1302_name, RTC_MAJOR_NR);
509 return -1;
510 }
511 return 0;
512
513}
514
515module_init(ds1302_register);
diff --git a/arch/cris/arch-v10/drivers/pcf8563.c b/arch/cris/arch-v10/drivers/pcf8563.c
deleted file mode 100644
index 9da056860c9..00000000000
--- a/arch/cris/arch-v10/drivers/pcf8563.c
+++ /dev/null
@@ -1,380 +0,0 @@
1/*
2 * PCF8563 RTC
3 *
4 * From Phillips' datasheet:
5 *
6 * The PCF8563 is a CMOS real-time clock/calendar optimized for low power
7 * consumption. A programmable clock output, interrupt output and voltage
8 * low detector are also provided. All address and data are transferred
9 * serially via two-line bidirectional I2C-bus. Maximum bus speed is
10 * 400 kbits/s. The built-in word address register is incremented
11 * automatically after each written or read byte.
12 *
13 * Copyright (c) 2002-2007, Axis Communications AB
14 * All rights reserved.
15 *
16 * Author: Tobias Anderberg <tobiasa@axis.com>.
17 *
18 */
19
20#include <linux/module.h>
21#include <linux/kernel.h>
22#include <linux/types.h>
23#include <linux/sched.h>
24#include <linux/init.h>
25#include <linux/fs.h>
26#include <linux/ioctl.h>
27#include <linux/delay.h>
28#include <linux/bcd.h>
29#include <linux/mutex.h>
30
31#include <asm/uaccess.h>
32#include <asm/io.h>
33#include <asm/rtc.h>
34
35#include "i2c.h"
36
37#define PCF8563_MAJOR 121 /* Local major number. */
38#define DEVICE_NAME "rtc" /* Name which is registered in /proc/devices. */
39#define PCF8563_NAME "PCF8563"
40#define DRIVER_VERSION "$Revision: 1.24 $"
41
42/* I2C bus slave registers. */
43#define RTC_I2C_READ 0xa3
44#define RTC_I2C_WRITE 0xa2
45
46/* Two simple wrapper macros, saves a few keystrokes. */
47#define rtc_read(x) i2c_readreg(RTC_I2C_READ, x)
48#define rtc_write(x,y) i2c_writereg(RTC_I2C_WRITE, x, y)
49
50static DEFINE_MUTEX(pcf8563_mutex);
51static DEFINE_MUTEX(rtc_lock); /* Protect state etc */
52
53static const unsigned char days_in_month[] =
54 { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
55
56static long pcf8563_unlocked_ioctl(struct file *, unsigned int, unsigned long);
57
58/* Cache VL bit value read at driver init since writing the RTC_SECOND
59 * register clears the VL status.
60 */
61static int voltage_low;
62
63static const struct file_operations pcf8563_fops = {
64 .owner = THIS_MODULE,
65 .unlocked_ioctl = pcf8563_unlocked_ioctl,
66 .llseek = noop_llseek,
67};
68
69unsigned char
70pcf8563_readreg(int reg)
71{
72 unsigned char res = rtc_read(reg);
73
74 /* The PCF8563 does not return 0 for unimplemented bits. */
75 switch (reg) {
76 case RTC_SECONDS:
77 case RTC_MINUTES:
78 res &= 0x7F;
79 break;
80 case RTC_HOURS:
81 case RTC_DAY_OF_MONTH:
82 res &= 0x3F;
83 break;
84 case RTC_WEEKDAY:
85 res &= 0x07;
86 break;
87 case RTC_MONTH:
88 res &= 0x1F;
89 break;
90 case RTC_CONTROL1:
91 res &= 0xA8;
92 break;
93 case RTC_CONTROL2:
94 res &= 0x1F;
95 break;
96 case RTC_CLOCKOUT_FREQ:
97 case RTC_TIMER_CONTROL:
98 res &= 0x83;
99 break;
100 }
101 return res;
102}
103
104void
105pcf8563_writereg(int reg, unsigned char val)
106{
107 rtc_write(reg, val);
108}
109
110void
111get_rtc_time(struct rtc_time *tm)
112{
113 tm->tm_sec = rtc_read(RTC_SECONDS);
114 tm->tm_min = rtc_read(RTC_MINUTES);
115 tm->tm_hour = rtc_read(RTC_HOURS);
116 tm->tm_mday = rtc_read(RTC_DAY_OF_MONTH);
117 tm->tm_wday = rtc_read(RTC_WEEKDAY);
118 tm->tm_mon = rtc_read(RTC_MONTH);
119 tm->tm_year = rtc_read(RTC_YEAR);
120
121 if (tm->tm_sec & 0x80) {
122 printk(KERN_ERR "%s: RTC Voltage Low - reliable date/time "
123 "information is no longer guaranteed!\n", PCF8563_NAME);
124 }
125
126 tm->tm_year = bcd2bin(tm->tm_year) +
127 ((tm->tm_mon & 0x80) ? 100 : 0);
128 tm->tm_sec &= 0x7F;
129 tm->tm_min &= 0x7F;
130 tm->tm_hour &= 0x3F;
131 tm->tm_mday &= 0x3F;
132 tm->tm_wday &= 0x07; /* Not coded in BCD. */
133 tm->tm_mon &= 0x1F;
134
135 tm->tm_sec = bcd2bin(tm->tm_sec);
136 tm->tm_min = bcd2bin(tm->tm_min);
137 tm->tm_hour = bcd2bin(tm->tm_hour);
138 tm->tm_mday = bcd2bin(tm->tm_mday);
139 tm->tm_mon = bcd2bin(tm->tm_mon);
140 tm->tm_mon--; /* Month is 1..12 in RTC but 0..11 in linux */
141}
142
143int __init
144pcf8563_init(void)
145{
146 static int res;
147 static int first = 1;
148
149 if (!first)
150 return res;
151 first = 0;
152
153 /* Initiate the i2c protocol. */
154 res = i2c_init();
155 if (res < 0) {
156 printk(KERN_CRIT "pcf8563_init: Failed to init i2c.\n");
157 return res;
158 }
159
160 /*
161 * First of all we need to reset the chip. This is done by
162 * clearing control1, control2 and clk freq and resetting
163 * all alarms.
164 */
165 if (rtc_write(RTC_CONTROL1, 0x00) < 0)
166 goto err;
167
168 if (rtc_write(RTC_CONTROL2, 0x00) < 0)
169 goto err;
170
171 if (rtc_write(RTC_CLOCKOUT_FREQ, 0x00) < 0)
172 goto err;
173
174 if (rtc_write(RTC_TIMER_CONTROL, 0x03) < 0)
175 goto err;
176
177 /* Reset the alarms. */
178 if (rtc_write(RTC_MINUTE_ALARM, 0x80) < 0)
179 goto err;
180
181 if (rtc_write(RTC_HOUR_ALARM, 0x80) < 0)
182 goto err;
183
184 if (rtc_write(RTC_DAY_ALARM, 0x80) < 0)
185 goto err;
186
187 if (rtc_write(RTC_WEEKDAY_ALARM, 0x80) < 0)
188 goto err;
189
190 /* Check for low voltage, and warn about it. */
191 if (rtc_read(RTC_SECONDS) & 0x80) {
192 voltage_low = 1;
193 printk(KERN_WARNING "%s: RTC Voltage Low - reliable "
194 "date/time information is no longer guaranteed!\n",
195 PCF8563_NAME);
196 }
197
198 return res;
199
200err:
201 printk(KERN_INFO "%s: Error initializing chip.\n", PCF8563_NAME);
202 res = -1;
203 return res;
204}
205
206void __exit
207pcf8563_exit(void)
208{
209 unregister_chrdev(PCF8563_MAJOR, DEVICE_NAME);
210}
211
212/*
213 * ioctl calls for this driver. Why return -ENOTTY upon error? Because
214 * POSIX says so!
215 */
216static int pcf8563_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
217{
218 /* Some sanity checks. */
219 if (_IOC_TYPE(cmd) != RTC_MAGIC)
220 return -ENOTTY;
221
222 if (_IOC_NR(cmd) > RTC_MAX_IOCTL)
223 return -ENOTTY;
224
225 switch (cmd) {
226 case RTC_RD_TIME:
227 {
228 struct rtc_time tm;
229
230 mutex_lock(&rtc_lock);
231 memset(&tm, 0, sizeof tm);
232 get_rtc_time(&tm);
233
234 if (copy_to_user((struct rtc_time *) arg, &tm,
235 sizeof tm)) {
236 mutex_unlock(&rtc_lock);
237 return -EFAULT;
238 }
239
240 mutex_unlock(&rtc_lock);
241
242 return 0;
243 }
244 case RTC_SET_TIME:
245 {
246 int leap;
247 int year;
248 int century;
249 struct rtc_time tm;
250
251 memset(&tm, 0, sizeof tm);
252 if (!capable(CAP_SYS_TIME))
253 return -EPERM;
254
255 if (copy_from_user(&tm, (struct rtc_time *) arg, sizeof tm))
256 return -EFAULT;
257
258 /* Convert from struct tm to struct rtc_time. */
259 tm.tm_year += 1900;
260 tm.tm_mon += 1;
261
262 /*
263 * Check if tm.tm_year is a leap year. A year is a leap
264 * year if it is divisible by 4 but not 100, except
265 * that years divisible by 400 _are_ leap years.
266 */
267 year = tm.tm_year;
268 leap = (tm.tm_mon == 2) &&
269 ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0);
270
271 /* Perform some sanity checks. */
272 if ((tm.tm_year < 1970) ||
273 (tm.tm_mon > 12) ||
274 (tm.tm_mday == 0) ||
275 (tm.tm_mday > days_in_month[tm.tm_mon] + leap) ||
276 (tm.tm_wday >= 7) ||
277 (tm.tm_hour >= 24) ||
278 (tm.tm_min >= 60) ||
279 (tm.tm_sec >= 60))
280 return -EINVAL;
281
282 century = (tm.tm_year >= 2000) ? 0x80 : 0;
283 tm.tm_year = tm.tm_year % 100;
284
285 tm.tm_year = bin2bcd(tm.tm_year);
286 tm.tm_mon = bin2bcd(tm.tm_mon);
287 tm.tm_mday = bin2bcd(tm.tm_mday);
288 tm.tm_hour = bin2bcd(tm.tm_hour);
289 tm.tm_min = bin2bcd(tm.tm_min);
290 tm.tm_sec = bin2bcd(tm.tm_sec);
291 tm.tm_mon |= century;
292
293 mutex_lock(&rtc_lock);
294
295 rtc_write(RTC_YEAR, tm.tm_year);
296 rtc_write(RTC_MONTH, tm.tm_mon);
297 rtc_write(RTC_WEEKDAY, tm.tm_wday); /* Not coded in BCD. */
298 rtc_write(RTC_DAY_OF_MONTH, tm.tm_mday);
299 rtc_write(RTC_HOURS, tm.tm_hour);
300 rtc_write(RTC_MINUTES, tm.tm_min);
301 rtc_write(RTC_SECONDS, tm.tm_sec);
302
303 mutex_unlock(&rtc_lock);
304
305 return 0;
306 }
307 case RTC_VL_READ:
308 if (voltage_low) {
309 printk(KERN_ERR "%s: RTC Voltage Low - "
310 "reliable date/time information is no "
311 "longer guaranteed!\n", PCF8563_NAME);
312 }
313
314 if (copy_to_user((int *) arg, &voltage_low, sizeof(int)))
315 return -EFAULT;
316 return 0;
317
318 case RTC_VL_CLR:
319 {
320 /* Clear the VL bit in the seconds register in case
321 * the time has not been set already (which would
322 * have cleared it). This does not really matter
323 * because of the cached voltage_low value but do it
324 * anyway for consistency. */
325
326 int ret = rtc_read(RTC_SECONDS);
327
328 rtc_write(RTC_SECONDS, (ret & 0x7F));
329
330 /* Clear the cached value. */
331 voltage_low = 0;
332
333 return 0;
334 }
335 default:
336 return -ENOTTY;
337 }
338
339 return 0;
340}
341
342static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
343{
344 int ret;
345
346 mutex_lock(&pcf8563_mutex);
347 ret = pcf8563_ioctl(filp, cmd, arg);
348 mutex_unlock(&pcf8563_mutex);
349
350 return ret;
351}
352
353static int __init pcf8563_register(void)
354{
355 if (pcf8563_init() < 0) {
356 printk(KERN_INFO "%s: Unable to initialize Real-Time Clock "
357 "Driver, %s\n", PCF8563_NAME, DRIVER_VERSION);
358 return -1;
359 }
360
361 if (register_chrdev(PCF8563_MAJOR, DEVICE_NAME, &pcf8563_fops) < 0) {
362 printk(KERN_INFO "%s: Unable to get major number %d for RTC device.\n",
363 PCF8563_NAME, PCF8563_MAJOR);
364 return -1;
365 }
366
367 printk(KERN_INFO "%s Real-Time Clock Driver, %s\n", PCF8563_NAME,
368 DRIVER_VERSION);
369
370 /* Check for low voltage, and warn about it. */
371 if (voltage_low) {
372 printk(KERN_WARNING "%s: RTC Voltage Low - reliable date/time "
373 "information is no longer guaranteed!\n", PCF8563_NAME);
374 }
375
376 return 0;
377}
378
379module_init(pcf8563_register);
380module_exit(pcf8563_exit);
diff --git a/arch/cris/arch-v10/kernel/fasttimer.c b/arch/cris/arch-v10/kernel/fasttimer.c
index 8a8196ee8ce..082f1890bac 100644
--- a/arch/cris/arch-v10/kernel/fasttimer.c
+++ b/arch/cris/arch-v10/kernel/fasttimer.c
@@ -21,8 +21,6 @@
21#include <asm/io.h> 21#include <asm/io.h>
22#include <asm/irq.h> 22#include <asm/irq.h>
23#include <asm/delay.h> 23#include <asm/delay.h>
24#include <asm/rtc.h>
25
26 24
27#include <arch/svinto.h> 25#include <arch/svinto.h>
28#include <asm/fasttimer.h> 26#include <asm/fasttimer.h>
diff --git a/arch/cris/arch-v10/kernel/time.c b/arch/cris/arch-v10/kernel/time.c
index 20c85b5dc7d..bcffcb6a941 100644
--- a/arch/cris/arch-v10/kernel/time.c
+++ b/arch/cris/arch-v10/kernel/time.c
@@ -19,16 +19,12 @@
19#include <asm/signal.h> 19#include <asm/signal.h>
20#include <asm/io.h> 20#include <asm/io.h>
21#include <asm/delay.h> 21#include <asm/delay.h>
22#include <asm/rtc.h>
23#include <asm/irq_regs.h> 22#include <asm/irq_regs.h>
24 23
25/* define this if you need to use print_timestamp */ 24/* define this if you need to use print_timestamp */
26/* it will make jiffies at 96 hz instead of 100 hz though */ 25/* it will make jiffies at 96 hz instead of 100 hz though */
27#undef USE_CASCADE_TIMERS 26#undef USE_CASCADE_TIMERS
28 27
29extern int set_rtc_mmss(unsigned long nowtime);
30extern int have_rtc;
31
32unsigned long get_ns_in_jiffie(void) 28unsigned long get_ns_in_jiffie(void)
33{ 29{
34 unsigned char timer_count, t1; 30 unsigned char timer_count, t1;
@@ -203,11 +199,6 @@ time_init(void)
203 */ 199 */
204 loops_per_usec = 50; 200 loops_per_usec = 50;
205 201
206 if(RTC_INIT() < 0)
207 have_rtc = 0;
208 else
209 have_rtc = 1;
210
211 /* Setup the etrax timers 202 /* Setup the etrax timers
212 * Base frequency is 25000 hz, divider 250 -> 100 HZ 203 * Base frequency is 25000 hz, divider 250 -> 100 HZ
213 * In normal mode, we use timer0, so timer1 is free. In cascade 204 * In normal mode, we use timer0, so timer1 is free. In cascade
diff --git a/arch/cris/arch-v32/kernel/time.c b/arch/cris/arch-v32/kernel/time.c
index 6773fc83a67..8c4b45efd7b 100644
--- a/arch/cris/arch-v32/kernel/time.c
+++ b/arch/cris/arch-v32/kernel/time.c
@@ -18,7 +18,6 @@
18#include <asm/signal.h> 18#include <asm/signal.h>
19#include <asm/io.h> 19#include <asm/io.h>
20#include <asm/delay.h> 20#include <asm/delay.h>
21#include <asm/rtc.h>
22#include <asm/irq.h> 21#include <asm/irq.h>
23#include <asm/irq_regs.h> 22#include <asm/irq_regs.h>
24 23
@@ -67,7 +66,6 @@ unsigned long timer_regs[NR_CPUS] =
67}; 66};
68 67
69extern int set_rtc_mmss(unsigned long nowtime); 68extern int set_rtc_mmss(unsigned long nowtime);
70extern int have_rtc;
71 69
72#ifdef CONFIG_CPU_FREQ 70#ifdef CONFIG_CPU_FREQ
73static int 71static int
@@ -265,11 +263,6 @@ void __init time_init(void)
265 */ 263 */
266 loops_per_usec = 50; 264 loops_per_usec = 50;
267 265
268 if(RTC_INIT() < 0)
269 have_rtc = 0;
270 else
271 have_rtc = 1;
272
273 /* Start CPU local timer. */ 266 /* Start CPU local timer. */
274 cris_timer_init(); 267 cris_timer_init();
275 268
diff --git a/arch/cris/include/asm/Kbuild b/arch/cris/include/asm/Kbuild
index 956eea246b9..04d02a51c5e 100644
--- a/arch/cris/include/asm/Kbuild
+++ b/arch/cris/include/asm/Kbuild
@@ -6,5 +6,4 @@ header-y += arch-v32/
6header-y += ethernet.h 6header-y += ethernet.h
7header-y += etraxgpio.h 7header-y += etraxgpio.h
8header-y += rs485.h 8header-y += rs485.h
9header-y += rtc.h
10header-y += sync_serial.h 9header-y += sync_serial.h
diff --git a/arch/cris/include/asm/rtc.h b/arch/cris/include/asm/rtc.h
deleted file mode 100644
index 17d3019529e..00000000000
--- a/arch/cris/include/asm/rtc.h
+++ /dev/null
@@ -1,107 +0,0 @@
1
2#ifndef __RTC_H__
3#define __RTC_H__
4
5#ifdef CONFIG_ETRAX_DS1302
6 /* Dallas DS1302 clock/calendar register numbers. */
7# define RTC_SECONDS 0
8# define RTC_MINUTES 1
9# define RTC_HOURS 2
10# define RTC_DAY_OF_MONTH 3
11# define RTC_MONTH 4
12# define RTC_WEEKDAY 5
13# define RTC_YEAR 6
14# define RTC_CONTROL 7
15
16 /* Bits in CONTROL register. */
17# define RTC_CONTROL_WRITEPROTECT 0x80
18# define RTC_TRICKLECHARGER 8
19
20 /* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */
21# define RTC_TCR_PATTERN 0xA0 /* 1010xxxx */
22# define RTC_TCR_1DIOD 0x04 /* xxxx01xx */
23# define RTC_TCR_2DIOD 0x08 /* xxxx10xx */
24# define RTC_TCR_DISABLED 0x00 /* xxxxxx00 Disabled */
25# define RTC_TCR_2KOHM 0x01 /* xxxxxx01 2KOhm */
26# define RTC_TCR_4KOHM 0x02 /* xxxxxx10 4kOhm */
27# define RTC_TCR_8KOHM 0x03 /* xxxxxx11 8kOhm */
28
29#elif defined(CONFIG_ETRAX_PCF8563)
30 /* I2C bus slave registers. */
31# define RTC_I2C_READ 0xa3
32# define RTC_I2C_WRITE 0xa2
33
34 /* Phillips PCF8563 registers. */
35# define RTC_CONTROL1 0x00 /* Control/Status register 1. */
36# define RTC_CONTROL2 0x01 /* Control/Status register 2. */
37# define RTC_CLOCKOUT_FREQ 0x0d /* CLKOUT frequency. */
38# define RTC_TIMER_CONTROL 0x0e /* Timer control. */
39# define RTC_TIMER_CNTDOWN 0x0f /* Timer countdown. */
40
41 /* BCD encoded clock registers. */
42# define RTC_SECONDS 0x02
43# define RTC_MINUTES 0x03
44# define RTC_HOURS 0x04
45# define RTC_DAY_OF_MONTH 0x05
46# define RTC_WEEKDAY 0x06 /* Not coded in BCD! */
47# define RTC_MONTH 0x07
48# define RTC_YEAR 0x08
49# define RTC_MINUTE_ALARM 0x09
50# define RTC_HOUR_ALARM 0x0a
51# define RTC_DAY_ALARM 0x0b
52# define RTC_WEEKDAY_ALARM 0x0c
53
54#endif
55
56#ifdef CONFIG_ETRAX_DS1302
57extern unsigned char ds1302_readreg(int reg);
58extern void ds1302_writereg(int reg, unsigned char val);
59extern int ds1302_init(void);
60# define CMOS_READ(x) ds1302_readreg(x)
61# define CMOS_WRITE(val,reg) ds1302_writereg(reg,val)
62# define RTC_INIT() ds1302_init()
63#elif defined(CONFIG_ETRAX_PCF8563)
64extern unsigned char pcf8563_readreg(int reg);
65extern void pcf8563_writereg(int reg, unsigned char val);
66extern int pcf8563_init(void);
67# define CMOS_READ(x) pcf8563_readreg(x)
68# define CMOS_WRITE(val,reg) pcf8563_writereg(reg,val)
69# define RTC_INIT() pcf8563_init()
70#else
71 /* No RTC configured so we shouldn't try to access any. */
72# define CMOS_READ(x) 42
73# define CMOS_WRITE(x,y)
74# define RTC_INIT() (-1)
75#endif
76
77/*
78 * The struct used to pass data via the following ioctl. Similar to the
79 * struct tm in <time.h>, but it needs to be here so that the kernel
80 * source is self contained, allowing cross-compiles, etc. etc.
81 */
82struct rtc_time {
83 int tm_sec;
84 int tm_min;
85 int tm_hour;
86 int tm_mday;
87 int tm_mon;
88 int tm_year;
89 int tm_wday;
90 int tm_yday;
91 int tm_isdst;
92};
93
94/* ioctl() calls that are permitted to the /dev/rtc interface. */
95#define RTC_MAGIC 'p'
96/* Read RTC time. */
97#define RTC_RD_TIME _IOR(RTC_MAGIC, 0x09, struct rtc_time)
98/* Set RTC time. */
99#define RTC_SET_TIME _IOW(RTC_MAGIC, 0x0a, struct rtc_time)
100#define RTC_SET_CHARGE _IOW(RTC_MAGIC, 0x0b, int)
101/* Voltage low detector */
102#define RTC_VL_READ _IOR(RTC_MAGIC, 0x13, int)
103/* Clear voltage low information */
104#define RTC_VL_CLR _IO(RTC_MAGIC, 0x14)
105#define RTC_MAX_IOCTL 0x14
106
107#endif /* __RTC_H__ */
diff --git a/arch/cris/kernel/time.c b/arch/cris/kernel/time.c
index 4e73092e85c..277ffc459e4 100644
--- a/arch/cris/kernel/time.c
+++ b/arch/cris/kernel/time.c
@@ -21,7 +21,6 @@
21 * 21 *
22 */ 22 */
23 23
24#include <asm/rtc.h>
25#include <linux/errno.h> 24#include <linux/errno.h>
26#include <linux/module.h> 25#include <linux/module.h>
27#include <linux/param.h> 26#include <linux/param.h>
@@ -32,7 +31,8 @@
32#include <linux/profile.h> 31#include <linux/profile.h>
33#include <linux/sched.h> /* just for sched_clock() - funny that */ 32#include <linux/sched.h> /* just for sched_clock() - funny that */
34 33
35int have_rtc; /* used to remember if we have an RTC or not */; 34
35#define D(x)
36 36
37#define TICK_SIZE tick 37#define TICK_SIZE tick
38 38
@@ -50,78 +50,16 @@ u32 arch_gettimeoffset(void)
50} 50}
51#endif 51#endif
52 52
53/*
54 * BUG: This routine does not handle hour overflow properly; it just
55 * sets the minutes. Usually you'll only notice that after reboot!
56 */
57
58int set_rtc_mmss(unsigned long nowtime) 53int set_rtc_mmss(unsigned long nowtime)
59{ 54{
60 int retval = 0; 55 D(printk(KERN_DEBUG "set_rtc_mmss(%lu)\n", nowtime));
61 int real_seconds, real_minutes, cmos_minutes; 56 return 0;
62
63 printk(KERN_DEBUG "set_rtc_mmss(%lu)\n", nowtime);
64
65 if(!have_rtc)
66 return 0;
67
68 cmos_minutes = CMOS_READ(RTC_MINUTES);
69 cmos_minutes = bcd2bin(cmos_minutes);
70
71 /*
72 * since we're only adjusting minutes and seconds,
73 * don't interfere with hour overflow. This avoids
74 * messing with unknown time zones but requires your
75 * RTC not to be off by more than 15 minutes
76 */
77 real_seconds = nowtime % 60;
78 real_minutes = nowtime / 60;
79 if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1)
80 real_minutes += 30; /* correct for half hour time zone */
81 real_minutes %= 60;
82
83 if (abs(real_minutes - cmos_minutes) < 30) {
84 real_seconds = bin2bcd(real_seconds);
85 real_minutes = bin2bcd(real_minutes);
86 CMOS_WRITE(real_seconds,RTC_SECONDS);
87 CMOS_WRITE(real_minutes,RTC_MINUTES);
88 } else {
89 printk_once(KERN_NOTICE
90 "set_rtc_mmss: can't update from %d to %d\n",
91 cmos_minutes, real_minutes);
92 retval = -1;
93 }
94
95 return retval;
96} 57}
97 58
98/* grab the time from the RTC chip */ 59/* grab the time from the RTC chip */
99 60unsigned long get_cmos_time(void)
100unsigned long
101get_cmos_time(void)
102{ 61{
103 unsigned int year, mon, day, hour, min, sec; 62 return 0;
104 if(!have_rtc)
105 return 0;
106
107 sec = CMOS_READ(RTC_SECONDS);
108 min = CMOS_READ(RTC_MINUTES);
109 hour = CMOS_READ(RTC_HOURS);
110 day = CMOS_READ(RTC_DAY_OF_MONTH);
111 mon = CMOS_READ(RTC_MONTH);
112 year = CMOS_READ(RTC_YEAR);
113
114 sec = bcd2bin(sec);
115 min = bcd2bin(min);
116 hour = bcd2bin(hour);
117 day = bcd2bin(day);
118 mon = bcd2bin(mon);
119 year = bcd2bin(year);
120
121 if ((year += 1900) < 1970)
122 year += 100;
123
124 return mktime(year, mon, day, hour, min, sec);
125} 63}
126 64
127 65
@@ -132,7 +70,7 @@ int update_persistent_clock(struct timespec now)
132 70
133void read_persistent_clock(struct timespec *ts) 71void read_persistent_clock(struct timespec *ts)
134{ 72{
135 ts->tv_sec = get_cmos_time(); 73 ts->tv_sec = 0;
136 ts->tv_nsec = 0; 74 ts->tv_nsec = 0;
137} 75}
138 76
generated by cgit v1.2.2 (git 2.25.0) at 2026-04-26 15:45:12 -0400