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Linux/arch/powerpc/platforms/ps3/time.c

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  1 /*
  2  *  PS3 time and rtc routines.
  3  *
  4  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
  5  *  Copyright 2006 Sony Corp.
  6  *
  7  *  This program is free software; you can redistribute it and/or modify
  8  *  it under the terms of the GNU General Public License as published by
  9  *  the Free Software Foundation; version 2 of the License.
 10  *
 11  *  This program is distributed in the hope that it will be useful,
 12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  *  GNU General Public License for more details.
 15  *
 16  *  You should have received a copy of the GNU General Public License
 17  *  along with this program; if not, write to the Free Software
 18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 19  */
 20 
 21 #include <linux/kernel.h>
 22 #include <linux/platform_device.h>
 23 #include <linux/rtc.h>
 24 
 25 #include <asm/firmware.h>
 26 #include <asm/lv1call.h>
 27 #include <asm/ps3.h>
 28 
 29 #include "platform.h"
 30 
 31 #define dump_tm(_a) _dump_tm(_a, __func__, __LINE__)
 32 static void _dump_tm(const struct rtc_time *tm, const char* func, int line)
 33 {
 34         pr_debug("%s:%d tm_sec  %d\n", func, line, tm->tm_sec);
 35         pr_debug("%s:%d tm_min  %d\n", func, line, tm->tm_min);
 36         pr_debug("%s:%d tm_hour %d\n", func, line, tm->tm_hour);
 37         pr_debug("%s:%d tm_mday %d\n", func, line, tm->tm_mday);
 38         pr_debug("%s:%d tm_mon  %d\n", func, line, tm->tm_mon);
 39         pr_debug("%s:%d tm_year %d\n", func, line, tm->tm_year);
 40         pr_debug("%s:%d tm_wday %d\n", func, line, tm->tm_wday);
 41 }
 42 
 43 #define dump_time(_a) _dump_time(_a, __func__, __LINE__)
 44 static void __maybe_unused _dump_time(int time, const char *func,
 45         int line)
 46 {
 47         struct rtc_time tm;
 48 
 49         to_tm(time, &tm);
 50 
 51         pr_debug("%s:%d time    %d\n", func, line, time);
 52         _dump_tm(&tm, func, line);
 53 }
 54 
 55 void __init ps3_calibrate_decr(void)
 56 {
 57         int result;
 58         u64 tmp;
 59 
 60         result = ps3_repository_read_be_tb_freq(0, &tmp);
 61         BUG_ON(result);
 62 
 63         ppc_tb_freq = tmp;
 64         ppc_proc_freq = ppc_tb_freq * 40;
 65 }
 66 
 67 static u64 read_rtc(void)
 68 {
 69         int result;
 70         u64 rtc_val;
 71         u64 tb_val;
 72 
 73         result = lv1_get_rtc(&rtc_val, &tb_val);
 74         BUG_ON(result);
 75 
 76         return rtc_val;
 77 }
 78 
 79 unsigned long __init ps3_get_boot_time(void)
 80 {
 81         return read_rtc() + ps3_os_area_get_rtc_diff();
 82 }
 83 
 84 static int __init ps3_rtc_init(void)
 85 {
 86         struct platform_device *pdev;
 87 
 88         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 89                 return -ENODEV;
 90 
 91         pdev = platform_device_register_simple("rtc-ps3", -1, NULL, 0);
 92 
 93         return PTR_ERR_OR_ZERO(pdev);
 94 }
 95 device_initcall(ps3_rtc_init);
 96 

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