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
  24#include <asm/firmware.h>
  25#include <asm/rtc.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__)
  32static 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__)
  44static 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
  55void __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
  67static 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
  79unsigned long __init ps3_get_boot_time(void)
  80{
  81        return read_rtc() + ps3_os_area_get_rtc_diff();
  82}
  83
  84static 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_RET(pdev);
  94}
  95
  96module_init(ps3_rtc_init);
  97