Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]> --- arch/arm/mach-at91/Makefile | 1 + arch/arm/mach-at91/include/mach/at91_shdwc.h | 40 +++++++++++++++++ arch/arm/mach-at91/reset_source.c | 59 ++++++++++++++++++++++++++ 3 files changed, 100 insertions(+) create mode 100644 arch/arm/mach-at91/include/mach/at91_shdwc.h create mode 100644 arch/arm/mach-at91/reset_source.c
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile index 3ade725..1f912c6 100644 --- a/arch/arm/mach-at91/Makefile +++ b/arch/arm/mach-at91/Makefile @@ -8,6 +8,7 @@ pbl-$(CONFIG_MACH_DO_LOWLEVEL_INIT) += $(lowlevel_init-y) obj-$(CONFIG_AT91SAM9_RESET) += at91sam9_reset.o obj-$(CONFIG_AT91SAM9G45_RESET) += at91sam9g45_reset.o +obj-$(CONFIG_RESET_SOURCE) += reset_source.o # CPU-specific support obj-$(CONFIG_ARCH_AT91RM9200) += at91rm9200.o at91rm9200_time.o at91rm9200_devices.o diff --git a/arch/arm/mach-at91/include/mach/at91_shdwc.h b/arch/arm/mach-at91/include/mach/at91_shdwc.h new file mode 100644 index 0000000..75e6801 --- /dev/null +++ b/arch/arm/mach-at91/include/mach/at91_shdwc.h @@ -0,0 +1,40 @@ +/* + * arch/arm/mach-at91/include/mach/at91_shdwc.h + * + * Copyright (C) 2007 Andrew Victor + * Copyright (C) 2007 Atmel Corporation. + * + * Shutdown Controller (SHDWC) - System peripherals regsters. + * Based on AT91SAM9261 datasheet revision D. + * + * 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. + */ + +#ifndef AT91_SHDWC_H +#define AT91_SHDWC_H + +#define AT91_SHDW_CR (AT91_SHDWC + 0x00) /* Shut Down Control Register */ +#define AT91_SHDW_SHDW (1 << 0) /* Shut Down command */ +#define AT91_SHDW_KEY (0xa5 << 24) /* KEY Password */ + +#define AT91_SHDW_MR (AT91_SHDWC + 0x04) /* Shut Down Mode Register */ +#define AT91_SHDW_WKMODE0 (3 << 0) /* Wake-up 0 Mode Selection */ +#define AT91_SHDW_WKMODE0_NONE 0 +#define AT91_SHDW_WKMODE0_HIGH 1 +#define AT91_SHDW_WKMODE0_LOW 2 +#define AT91_SHDW_WKMODE0_ANYLEVEL 3 +#define AT91_SHDW_CPTWK0_MAX 0xf /* Maximum Counter On Wake Up 0 */ +#define AT91_SHDW_CPTWK0 (AT91_SHDW_CPTWK0_MAX << 4) /* Counter On Wake Up 0 */ +#define AT91_SHDW_CPTWK0_(x) ((x) << 4) +#define AT91_SHDW_RTTWKEN (1 << 16) /* Real Time Timer Wake-up Enable */ +#define AT91_SHDW_RTCWKEN (1 << 17) /* Real Time Clock Wake-up Enable */ + +#define AT91_SHDW_SR (AT91_SHDWC + 0x08) /* Shut Down Status Register */ +#define AT91_SHDW_WAKEUP0 (1 << 0) /* Wake-up 0 Status */ +#define AT91_SHDW_RTTWK (1 << 16) /* Real-time Timer Wake-up */ +#define AT91_SHDW_RTCWK (1 << 17) /* Real-time Clock Wake-up [SAM9RL] */ + +#endif diff --git a/arch/arm/mach-at91/reset_source.c b/arch/arm/mach-at91/reset_source.c new file mode 100644 index 0000000..b078941 --- /dev/null +++ b/arch/arm/mach-at91/reset_source.c @@ -0,0 +1,59 @@ +/* + * (C) Copyright 2012 Jean-Christophe PLAGNIOL-VILLARD <[email protected]> + * + * GPLv2 + */ + +#include <reset_source.h> +#include <io.h> +#include <init.h> +#include <mach/hardware.h> +#include <mach/io.h> + +#include <mach/at91_rstc.h> +#include <mach/at91_shdwc.h> + +static int at91_reset_status(void) +{ + u32 reset_type, wake_type; + + reset_type = at91_sys_read(AT91_RSTC_SR) & AT91_RSTC_RSTTYP; + wake_type = at91_sys_read(AT91_SHDW_SR); + + switch (reset_type) { + case AT91_RSTC_RSTTYP_GENERAL: + set_reset_source(RESET_POWER); + break; + case AT91_RSTC_RSTTYP_WAKEUP: + /* board-specific code enabled the wakeup sources */ + set_reset_source(RESET_WAKEUP); + + /* "wakeup signal" */ + if (wake_type & AT91_SHDW_WAKEUP0) + set_wakeup_source(WAKEUP_USER); + else if (wake_type & AT91_SHDW_RTTWK) /* rtt wakeup */ + set_wakeup_source(WAKEUP_TIMER); + else if (wake_type & AT91_SHDW_RTCWK) /* rtc wakeup */ + set_wakeup_source(WAKEUP_RTC); + else if (wake_type == 0) /* power-restored wakeup */ + set_wakeup_source(WAKEUP_POWER); + else /* unknown wakeup */ + set_wakeup_source(WAKEUP_UKWNOWN); + break; + case AT91_RSTC_RSTTYP_WATCHDOG: + set_reset_source(RESET_WATCHDOG); + break; + case AT91_RSTC_RSTTYP_SOFTWARE: + set_reset_source(RESET_SOFTWARE); + break; + case AT91_RSTC_RSTTYP_USER: + set_reset_source(RESET_RESET); + break; + default: + set_reset_source(RESET_UKWNOWN); + break; + } + + return 0; +} +device_initcall(at91_reset_status); -- 1.7.10.4 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
