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authorWolfgang Denk <wd@denx.de>2011-08-04 23:05:07 +0200
committerWolfgang Denk <wd@denx.de>2011-08-04 23:05:07 +0200
commitfb6440ee9b110b759ef61fd80bbd0df1bbf0f37b (patch)
treedbde38784fb8b48c7f9b14e70a947fab3a1f3bab /drivers/rtc/mvrtc.c
parent01b0f50060923e89693bf155c677e4f665916b3f (diff)
parentb608b95753873a5073f550cca002c4bebf1a18f5 (diff)
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Merge branch 'master' of git://git.denx.de/u-boot-arm
* 'master' of git://git.denx.de/u-boot-arm: drivers/rtc: add Marvell Integrated RTC Armada100: Add Board Support for Marvell GuruPlug-Display Armada100: MFP macro naming correction arm: auto gen asm-offsets.h for mb86r0x spear: fix build errors for spear3xx/spear600 platforms cosmetic: arm: lib/board.c: Coding Style cleanup ARM: versatile: fix board support SMDKV310: Enable device tree support SMDKV310: MMC_SPL: Fix building when using "make O=" arm: a320: enable tagged list support arm: a320: fix multiline comment style ARMv7: u8500_href: Add missing header to fix compiler warning Removed unused define, CONFIG_ARMV7. avr32: add grasshopper (ICnova AP7000) board AT91/SPI: fix atmel_dataflash_spi.c to allow building without warnings MAKEALL: remove AT91 boards that are in boards.cfg AT91: Makes AT91SAM9263-EK build correctly against u-boot-atmel/master AT91: Makes AT91SAM9263 SoC build correctly against u-boot-atmel/master AT91: Board fix for AT91SAM9261-EK AT91: SoC fix at91sam9261_matrix.h AT91: Makes AT91SAM9RL-EK build correctly against u-boot-atmel/master AT91: Makes AT91SAM9RL SoC build correctly against u-boot-atmel/master AT91: change common at91sam9261 files to compile with new scheme AT91: fix mistake in at91sam9260_devices.c(spi1_hw_init) a/a/c/arm920t/at91/reset.c: drop obsolete CONFIG_AT91RM9200_USART README: fix arm920t/at91 path net/eth.c: drop obsolete at91rm9200 support README.at91-soc: remove AT91(RM9200) joining notice a/a/c/arm920t/cpu.c: remove CONFIG_AT91_LEGACY warning MAKEALL: remove obsolete at91rm9200 soc ARM: remove obsolete at91rm9200 omap4: clock init support for omap4460 omap4: support TPS programming omap: reuse omap3 gpio support in omap4 omap4: sdram init changes for omap4460 omap4: add omap4460 revision detection mkimage: Add OMAP boot image support omap: add MMC and FAT support to SPL omap: add basic SPL support armv7: start.S: fixes and enhancements for SPL omap4: automatic sdram detection omap4: calculate EMIF register values omap4: add sdram init support omap4: add clock support omap4: add OMAP4430 revision check omap4: cleanup pin mux data omap4: utility function to identify the context of hw init DA8xx: fix LPSC constants DA8xx: switch an enum to defines for consistency DA8xx: add MMC/SD controller addresses DaVinci EMAC: declare function for all DA8xx CPUs DA8xx: add generic GPIO driver DaVinci: rename gpio_defs.h to gpio.h omap3evm: eth: Include functions only when necessary omap3evm: Update ethernet reset sequence for Rev.G board omap3evm: eth: split function setup_net_chip omap3: Include array definition only when it is used omap730p2: fix build breaks omap2420h4: fix build breaks omap1610inn: fix build breaks omap1510inn: fix build breaks omap5912osk: fix build breaks omap1610h2: fix build breaks
Diffstat (limited to 'drivers/rtc/mvrtc.c')
-rw-r--r--drivers/rtc/mvrtc.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/rtc/mvrtc.c b/drivers/rtc/mvrtc.c
new file mode 100644
index 0000000..ccc573a
--- /dev/null
+++ b/drivers/rtc/mvrtc.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2011
+ * Jason Cooper <u-boot@lakedaemon.net>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * Date & Time support for Marvell Integrated RTC
+ */
+
+#include <common.h>
+#include <command.h>
+#include <rtc.h>
+#include "mvrtc.h"
+
+/* This RTC does not support century, so we assume 20 */
+#define CENTURY 20
+
+int rtc_get(struct rtc_time *t)
+{
+ u32 time;
+ u32 date;
+ struct mvrtc_registers *mvrtc_regs;
+
+ mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE;
+
+ /* read the time register */
+ time = readl(&mvrtc_regs->time);
+
+ /* read the date register */
+ date = readl(&mvrtc_regs->date);
+
+ /* test for 12 hour clock (can't tell if it's am/pm) */
+ if (time & MVRTC_HRFMT_MSK) {
+ printf("Error: RTC in 12 hour mode, can't determine AM/PM.\n");
+ return -1;
+ }
+
+ /* time */
+ t->tm_sec = bcd2bin((time >> MVRTC_SEC_SFT) & MVRTC_SEC_MSK);
+ t->tm_min = bcd2bin((time >> MVRTC_MIN_SFT) & MVRTC_MIN_MSK);
+ t->tm_hour = bcd2bin((time >> MVRTC_HOUR_SFT) & MVRTC_HOUR_MSK);
+ t->tm_wday = bcd2bin((time >> MVRTC_DAY_SFT) & MVRTC_DAY_MSK);
+ t->tm_wday--;
+
+ /* date */
+ t->tm_mday = bcd2bin((date >> MVRTC_DATE_SFT) & MVRTC_DATE_MSK);
+ t->tm_mon = bcd2bin((date >> MVRTC_MON_SFT) & MVRTC_MON_MSK);
+ t->tm_year = bcd2bin((date >> MVRTC_YEAR_SFT) & MVRTC_YEAR_MSK);
+ t->tm_year += CENTURY * 100;
+
+ /* not supported in this RTC */
+ t->tm_yday = 0;
+ t->tm_isdst = 0;
+
+ return 0;
+}
+
+int rtc_set(struct rtc_time *t)
+{
+ u32 time = 0; /* sets hour format bit to zero, 24hr format. */
+ u32 date = 0;
+ struct mvrtc_registers *mvrtc_regs;
+
+ mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE;
+
+ /* check that this code isn't 80+ years old ;-) */
+ if ((t->tm_year / 100) != CENTURY)
+ printf("Warning: Only century %d supported.\n", CENTURY);
+
+ /* time */
+ time |= (bin2bcd(t->tm_sec) & MVRTC_SEC_MSK) << MVRTC_SEC_SFT;
+ time |= (bin2bcd(t->tm_min) & MVRTC_MIN_MSK) << MVRTC_MIN_SFT;
+ time |= (bin2bcd(t->tm_hour) & MVRTC_HOUR_MSK) << MVRTC_HOUR_SFT;
+ time |= (bin2bcd(t->tm_wday + 1) & MVRTC_DAY_MSK) << MVRTC_DAY_SFT;
+
+ /* date */
+ date |= (bin2bcd(t->tm_mday) & MVRTC_DATE_MSK) << MVRTC_DATE_SFT;
+ date |= (bin2bcd(t->tm_mon) & MVRTC_MON_MSK) << MVRTC_MON_SFT;
+ date |= (bin2bcd(t->tm_year % 100) & MVRTC_YEAR_MSK) << MVRTC_YEAR_SFT;
+
+ /* write the time register */
+ writel(time, &mvrtc_regs->time);
+
+ /* write the date register */
+ writel(date, &mvrtc_regs->date);
+
+ return 0;
+}
+
+void rtc_reset(void)
+{
+ u32 time;
+ u32 sec;
+ struct mvrtc_registers *mvrtc_regs;
+
+ mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE;
+
+ /* no init routine for this RTC needed, just check that it's working */
+ time = readl(&mvrtc_regs->time);
+ sec = bcd2bin((time >> MVRTC_SEC_SFT) & MVRTC_SEC_MSK);
+ udelay(1000000);
+ time = readl(&mvrtc_regs->time);
+
+ if (sec == bcd2bin((time >> MVRTC_SEC_SFT) & MVRTC_SEC_MSK))
+ printf("Error: RTC did not increment.\n");
+}