arch/powerpc/platforms/ps3/time.c

   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);