Guennadi Liakhovetski | d438749 | 2008-04-15 14:15:30 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008, Guennadi Liakhovetski <lg@denx.de> |
| 3 | * |
| 4 | * See file CREDITS for list of people who contributed to this |
| 5 | * project. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License as |
| 9 | * published by the Free Software Foundation; either version 2 of |
| 10 | * the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 20 | * MA 02111-1307 USA |
| 21 | */ |
| 22 | |
| 23 | #include <common.h> |
| 24 | #include <rtc.h> |
| 25 | #include <spi.h> |
| 26 | |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 27 | static struct spi_slave *slave; |
| 28 | |
Guennadi Liakhovetski | d438749 | 2008-04-15 14:15:30 +0200 | [diff] [blame] | 29 | int rtc_get(struct rtc_time *rtc) |
| 30 | { |
| 31 | u32 day1, day2, time; |
| 32 | u32 reg; |
| 33 | int err, tim, i = 0; |
| 34 | |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 35 | if (!slave) { |
| 36 | /* FIXME: Verify the max SCK rate */ |
Magnus Lilja | 4ce0011 | 2008-08-29 10:36:18 +0200 | [diff] [blame] | 37 | slave = spi_setup_slave(CONFIG_MC13783_SPI_BUS, |
| 38 | CONFIG_MC13783_SPI_CS, 1000000, |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 39 | SPI_MODE_2 | SPI_CS_HIGH); |
| 40 | if (!slave) |
| 41 | return -1; |
| 42 | } |
| 43 | |
| 44 | if (spi_claim_bus(slave)) |
| 45 | return -1; |
Guennadi Liakhovetski | d438749 | 2008-04-15 14:15:30 +0200 | [diff] [blame] | 46 | |
| 47 | do { |
| 48 | reg = 0x2c000000; |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 49 | err = spi_xfer(slave, 32, (uchar *)®, (uchar *)&day1, |
| 50 | SPI_XFER_BEGIN | SPI_XFER_END); |
Guennadi Liakhovetski | d438749 | 2008-04-15 14:15:30 +0200 | [diff] [blame] | 51 | |
| 52 | if (err) |
| 53 | return err; |
| 54 | |
| 55 | reg = 0x28000000; |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 56 | err = spi_xfer(slave, 32, (uchar *)®, (uchar *)&time, |
| 57 | SPI_XFER_BEGIN | SPI_XFER_END); |
Guennadi Liakhovetski | d438749 | 2008-04-15 14:15:30 +0200 | [diff] [blame] | 58 | |
| 59 | if (err) |
| 60 | return err; |
| 61 | |
| 62 | reg = 0x2c000000; |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 63 | err = spi_xfer(slave, 32, (uchar *)®, (uchar *)&day2, |
| 64 | SPI_XFER_BEGIN | SPI_XFER_END); |
Guennadi Liakhovetski | d438749 | 2008-04-15 14:15:30 +0200 | [diff] [blame] | 65 | |
| 66 | if (err) |
| 67 | return err; |
| 68 | } while (day1 != day2 && i++ < 3); |
| 69 | |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 70 | spi_release_bus(slave); |
| 71 | |
Guennadi Liakhovetski | d438749 | 2008-04-15 14:15:30 +0200 | [diff] [blame] | 72 | tim = day1 * 86400 + time; |
| 73 | to_tm(tim, rtc); |
| 74 | |
| 75 | rtc->tm_yday = 0; |
| 76 | rtc->tm_isdst = 0; |
| 77 | |
| 78 | return 0; |
| 79 | } |
| 80 | |
Jean-Christophe PLAGNIOL-VILLARD | 97a2e10 | 2008-09-01 23:06:23 +0200 | [diff] [blame] | 81 | int rtc_set(struct rtc_time *rtc) |
Guennadi Liakhovetski | d438749 | 2008-04-15 14:15:30 +0200 | [diff] [blame] | 82 | { |
| 83 | u32 time, day, reg; |
| 84 | |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 85 | if (!slave) { |
| 86 | /* FIXME: Verify the max SCK rate */ |
Magnus Lilja | 4ce0011 | 2008-08-29 10:36:18 +0200 | [diff] [blame] | 87 | slave = spi_setup_slave(CONFIG_MC13783_SPI_BUS, |
| 88 | CONFIG_MC13783_SPI_CS, 1000000, |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 89 | SPI_MODE_2 | SPI_CS_HIGH); |
| 90 | if (!slave) |
Jean-Christophe PLAGNIOL-VILLARD | 97a2e10 | 2008-09-01 23:06:23 +0200 | [diff] [blame] | 91 | return -1; |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 92 | } |
| 93 | |
Guennadi Liakhovetski | d438749 | 2008-04-15 14:15:30 +0200 | [diff] [blame] | 94 | time = mktime(rtc->tm_year, rtc->tm_mon, rtc->tm_mday, |
| 95 | rtc->tm_hour, rtc->tm_min, rtc->tm_sec); |
| 96 | day = time / 86400; |
| 97 | time %= 86400; |
| 98 | |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 99 | if (spi_claim_bus(slave)) |
Jean-Christophe PLAGNIOL-VILLARD | 97a2e10 | 2008-09-01 23:06:23 +0200 | [diff] [blame] | 100 | return -1; |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 101 | |
Guennadi Liakhovetski | d438749 | 2008-04-15 14:15:30 +0200 | [diff] [blame] | 102 | reg = 0x2c000000 | day | 0x80000000; |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 103 | spi_xfer(slave, 32, (uchar *)®, (uchar *)&day, |
| 104 | SPI_XFER_BEGIN | SPI_XFER_END); |
Guennadi Liakhovetski | d438749 | 2008-04-15 14:15:30 +0200 | [diff] [blame] | 105 | |
| 106 | reg = 0x28000000 | time | 0x80000000; |
Haavard Skinnemoen | d74084a | 2008-05-16 11:10:31 +0200 | [diff] [blame] | 107 | spi_xfer(slave, 32, (uchar *)®, (uchar *)&time, |
| 108 | SPI_XFER_BEGIN | SPI_XFER_END); |
| 109 | |
| 110 | spi_release_bus(slave); |
Jean-Christophe PLAGNIOL-VILLARD | 97a2e10 | 2008-09-01 23:06:23 +0200 | [diff] [blame] | 111 | |
Magnus Lilja | de7c7a7 | 2009-11-11 19:56:58 +0100 | [diff] [blame] | 112 | return 0; |
Guennadi Liakhovetski | d438749 | 2008-04-15 14:15:30 +0200 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | void rtc_reset(void) |
| 116 | { |
| 117 | } |