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