1 | /* SPDX-License-Identifier: BSD-2-Clause */ |
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2 | |
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3 | /** |
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4 | * @file |
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5 | * |
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6 | * @ingroup RTEMSBSPsARMLPC24XX |
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7 | * |
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8 | * @brief RTC configuration. |
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9 | */ |
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10 | |
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11 | /* |
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12 | * Copyright (c) 2008 embedded brains GmbH. All rights reserved. |
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13 | * Redistribution and use in source and binary forms, with or without |
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14 | * modification, are permitted provided that the following conditions |
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15 | * are met: |
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16 | * 1. Redistributions of source code must retain the above copyright |
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17 | * notice, this list of conditions and the following disclaimer. |
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18 | * 2. Redistributions in binary form must reproduce the above copyright |
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19 | * notice, this list of conditions and the following disclaimer in the |
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20 | * documentation and/or other materials provided with the distribution. |
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21 | * |
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22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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23 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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26 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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27 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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28 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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29 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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30 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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31 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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32 | * POSSIBILITY OF SUCH DAMAGE. |
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33 | */ |
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34 | |
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35 | #include <libchip/rtc.h> |
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36 | |
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37 | #include <bsp/lpc24xx.h> |
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38 | #include <bsp/io.h> |
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39 | |
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40 | #define LPC24XX_RTC_NUMBER 1 |
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41 | |
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42 | static void lpc24xx_rtc_initialize(int minor) |
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43 | { |
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44 | /* Enable module power */ |
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45 | lpc24xx_module_enable(LPC24XX_MODULE_RTC, LPC24XX_MODULE_PCLK_DEFAULT); |
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46 | |
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47 | /* Enable the RTC and use external clock */ |
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48 | RTC_CCR = RTC_CCR_CLKEN | RTC_CCR_CLKSRC; |
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49 | |
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50 | /* Disable interrupts */ |
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51 | RTC_CIIR = 0; |
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52 | RTC_CISS = 0; |
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53 | RTC_AMR = 0xff; |
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54 | |
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55 | /* Clear interrupts */ |
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56 | RTC_ILR = RTC_ILR_RTCCIF | RTC_ILR_RTCALF | RTC_ILR_RTSSF; |
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57 | } |
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58 | |
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59 | static int lpc24xx_rtc_get_time(int minor, rtems_time_of_day *tod) |
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60 | { |
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61 | tod->ticks = 0; |
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62 | tod->second = RTC_SEC; |
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63 | tod->minute = RTC_MIN; |
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64 | tod->hour = RTC_HOUR; |
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65 | tod->day = RTC_DOM; |
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66 | tod->month = RTC_MONTH; |
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67 | tod->year = RTC_YEAR; |
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68 | |
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69 | return 0; |
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70 | } |
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71 | |
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72 | static int lpc24xx_rtc_set_time(int minor, const rtems_time_of_day *tod) |
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73 | { |
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74 | RTC_SEC = tod->second; |
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75 | RTC_MIN = tod->minute; |
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76 | RTC_HOUR = tod->hour; |
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77 | RTC_DOM = tod->day; |
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78 | RTC_MONTH = tod->month; |
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79 | RTC_YEAR = tod->year; |
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80 | |
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81 | return 0; |
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82 | } |
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83 | |
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84 | static bool lpc24xx_rtc_probe(int minor) |
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85 | { |
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86 | return true; |
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87 | } |
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88 | |
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89 | const rtc_fns lpc24xx_rtc_ops = { |
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90 | .deviceInitialize = lpc24xx_rtc_initialize, |
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91 | .deviceGetTime = lpc24xx_rtc_get_time, |
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92 | .deviceSetTime = lpc24xx_rtc_set_time |
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93 | }; |
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94 | |
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95 | size_t RTC_Count = LPC24XX_RTC_NUMBER; |
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96 | |
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97 | rtc_tbl RTC_Table [LPC24XX_RTC_NUMBER] = { |
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98 | { |
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99 | .sDeviceName = "/dev/rtc", |
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100 | .deviceType = RTC_CUSTOM, |
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101 | .pDeviceFns = &lpc24xx_rtc_ops, |
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102 | .deviceProbe = lpc24xx_rtc_probe, |
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103 | .pDeviceParams = NULL, |
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104 | .ulCtrlPort1 = 0, |
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105 | .ulDataPort = 0, |
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106 | .getRegister = NULL, |
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107 | .setRegister = NULL |
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108 | } |
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109 | }; |
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