From 094e62a528e95677a16a9465a1decfdc045e7197 Mon Sep 17 00:00:00 2001 From: Amaury Pouly Date: Sat, 31 Dec 2011 13:35:45 +0000 Subject: [PATCH] imx233/fuze+: implement rtc (time only, alarm still to implement) git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31473 a1c6a512-1295-4272-9138-f99709370657 --- firmware/SOURCES | 1 + firmware/drivers/rtc/rtc_imx233.c | 142 +++++++++++++++++++++- firmware/target/arm/imx233/debug-imx233.c | 36 +++++- firmware/target/arm/imx233/rtc-imx233.h | 74 ++++++++++- 4 files changed, 247 insertions(+), 6 deletions(-) diff --git a/firmware/SOURCES b/firmware/SOURCES index 46ef51beea..e792bee89f 100644 --- a/firmware/SOURCES +++ b/firmware/SOURCES @@ -540,6 +540,7 @@ target/arm/imx233/power-imx233.c target/arm/imx233/powermgmt-imx233.c target/arm/imx233/adc-imx233.c target/arm/imx233/lradc-imx233.c +target/arm/imx233/rtc-imx233.c #ifndef BOOTLOADER target/arm/imx233/debug-imx233.c #endif diff --git a/firmware/drivers/rtc/rtc_imx233.c b/firmware/drivers/rtc/rtc_imx233.c index 4368610875..9e62476be6 100644 --- a/firmware/drivers/rtc/rtc_imx233.c +++ b/firmware/drivers/rtc/rtc_imx233.c @@ -22,21 +22,155 @@ #include "system.h" #include "rtc.h" #include "timefuncs.h" +#include "rtc-imx233.h" + +#if defined(SANSA_FUZEPLUS) +#define SECS_ADJUST 315532800 /* seconds between 1970-1-1 and 1980-1-1 */ +#else +#define SECS_ADJUST 0 +#endif + +#define MINUTE_SECONDS 60 +#define HOUR_SECONDS 3600 +#define DAY_SECONDS 86400 +#define WEEK_SECONDS 604800 +#define YEAR_SECONDS 31536000 +#define LEAP_YEAR_SECONDS 31622400 + +/* Days in each month */ +static unsigned int days_in_month[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; + +static inline bool is_leapyear(int year) +{ + if( ((year%4)==0) && (((year%100)!=0) || ((year%400)==0)) ) + return true; + else + return false; +} void rtc_init(void) { + imx233_rtc_init(); } int rtc_read_datetime(struct tm *tm) { - (void) tm; - return -1; + uint32_t seconds = imx233_rtc_read_seconds() - SECS_ADJUST; + #ifdef SANSA_FUZEPLUS + /* The OF uses PERSISTENT2 register to keep the adjustment and only changes + * SECONDS if necessary. */ + seconds += imx233_rtc_read_persistent(2); + #else + /* The Freescale recommended way of keeping time is the number of seconds + * since 00:00 1/1/1980 */ + #endif + + /* Convert seconds since 00:00 1/1/xxxx (xxxx=year) */ + + /* weekday */ + tm->tm_wday = ((seconds % WEEK_SECONDS) / DAY_SECONDS + 2) % 7; + + /* Year */ + int year = 1980; + while(seconds >= LEAP_YEAR_SECONDS) + { + if(is_leapyear(year)) + seconds -= LEAP_YEAR_SECONDS; + else + seconds -= YEAR_SECONDS; + + year++; + } + + if(is_leapyear(year)) + days_in_month[1] = 29; + else + { + days_in_month[1] = 28; + if(seconds>YEAR_SECONDS) + { + year++; + seconds -= YEAR_SECONDS; + } + } + tm->tm_year = year % 100 + 100; + + /* Month */ + for(int i = 0; i < 12; i++) + { + if(seconds < days_in_month[i] * DAY_SECONDS) + { + tm->tm_mon = i; + break; + } + + seconds -= days_in_month[i] * DAY_SECONDS; + } + + /* Month Day */ + int mday = seconds / DAY_SECONDS; + seconds -= mday * DAY_SECONDS; + tm->tm_mday = mday + 1; /* 1 ... 31 */ + + /* Hour */ + int hour = seconds / HOUR_SECONDS; + seconds -= hour*HOUR_SECONDS; + tm->tm_hour = hour; + + /* Minute */ + int min = seconds / MINUTE_SECONDS; + seconds -= min*MINUTE_SECONDS; + tm->tm_min = min; + + /* Second */ + tm->tm_sec = seconds; + + return 0; } int rtc_write_datetime(const struct tm *tm) { - (void) tm; - return -1; + int i, year; + unsigned int year_days = 0; + unsigned int month_days = 0; + unsigned int seconds = 0; + + year = 2000 + tm->tm_year - 100; + + if(is_leapyear(year)) + days_in_month[1] = 29; + else + days_in_month[1] = 28; + + /* Number of days in months gone by this year*/ + for(i = 0; i < tm->tm_mon; i++) + month_days += days_in_month[i]; + + /* Number of days in years gone by since 1-Jan-1980 */ + year_days = 365*(tm->tm_year-100+20) + (tm->tm_year-100-1)/4 + 6; + + /* Convert to seconds since 1-Jan-1980 */ + seconds = tm->tm_sec + + tm->tm_min*MINUTE_SECONDS + + tm->tm_hour*HOUR_SECONDS + + (tm->tm_mday-1)*DAY_SECONDS + + month_days*DAY_SECONDS + + year_days*DAY_SECONDS; + seconds += SECS_ADJUST; + + #ifdef SANSA_FUZEPLUS + /* The OF uses PERSISTENT2 register to keep the adjustment and only changes + * SECONDS if necessary. + * NOTE: the OF uses this mechanism to prevent roll back in time. Although + * Rockbox will handle a negative PERSISTENT2 value, the OF will detect + * it and won't return in time before SECONDS */ + imx233_rtc_write_persistent(2, seconds - imx233_rtc_read_seconds()); + #else + /* The Freescale recommended way of keeping time is the number of seconds + * since 00:00 1/1/1980 */ + imx233_rtc_write_seconds(seconds); + #endif + return 0; } void rtc_set_alarm(int h, int m) diff --git a/firmware/target/arm/imx233/debug-imx233.c b/firmware/target/arm/imx233/debug-imx233.c index 896c5bf6c3..228d2abcdb 100644 --- a/firmware/target/arm/imx233/debug-imx233.c +++ b/firmware/target/arm/imx233/debug-imx233.c @@ -30,6 +30,7 @@ #include "power-imx233.h" #include "clkctrl-imx233.h" #include "powermgmt-imx233.h" +#include "rtc-imx233.h" #include "string.h" static struct @@ -313,10 +314,43 @@ bool dbg_hw_info_powermgmt(void) } } +bool dbg_hw_info_rtc(void) +{ + lcd_setfont(FONT_SYSFIXED); + + while(1) + { + int button = get_action(CONTEXT_STD, HZ / 10); + switch(button) + { + case ACTION_STD_NEXT: + case ACTION_STD_PREV: + case ACTION_STD_OK: + case ACTION_STD_MENU: + lcd_setfont(FONT_UI); + return true; + case ACTION_STD_CANCEL: + lcd_setfont(FONT_UI); + return false; + } + + lcd_clear_display(); + struct imx233_rtc_info_t info = imx233_rtc_get_info(); + + lcd_putsf(0, 0, "seconds: %lu", info.seconds); + for(int i = 0; i < 6; i++) + lcd_putsf(0, i + 1, "persistent%d: 0x%lx", i, info.persistent[i]); + + lcd_update(); + yield(); + } +} + bool dbg_hw_info(void) { return dbg_hw_info_clkctrl() && dbg_hw_info_dma() && dbg_hw_info_adc() && - dbg_hw_info_power() && dbg_hw_info_powermgmt() && dbg_hw_target_info(); + dbg_hw_info_power() && dbg_hw_info_powermgmt() && dbg_hw_info_rtc() && + dbg_hw_target_info(); } bool dbg_ports(void) diff --git a/firmware/target/arm/imx233/rtc-imx233.h b/firmware/target/arm/imx233/rtc-imx233.h index c26832ab57..054ace40b8 100644 --- a/firmware/target/arm/imx233/rtc-imx233.h +++ b/firmware/target/arm/imx233/rtc-imx233.h @@ -25,13 +25,85 @@ #include "system.h" #include "cpu.h" -#define HW_RTC_BASE 0x8005C000 +#define HW_RTC_BASE 0x8005c000 #define HW_RTC_CTRL (*(volatile uint32_t *)(HW_RTC_BASE + 0x0)) +#define HW_RTC_CTRL__ALARM_IRQ_EN (1 << 0) +#define HW_RTC_CTRL__ONEMSEC_IRQ_EN (1 << 1) +#define HW_RTC_CTRL__ALARM_IRQ (1 << 2) +#define HW_RTC_CTRL__ONEMSEC_IRQ (1 << 3) +#define HW_RTC_CTRL__WATCHDOGEN (1 << 4) +#define HW_RTC_CTRL__FORCE_UPDATE (1 << 5) +#define HW_RTC_CTRL__SUPPRESS_COPY2ANALOG (1 << 6) + +#define HW_RTC_STAT (*(volatile uint32_t *)(HW_RTC_BASE + 0x10)) +#define HW_RTC_STAT__NEW_REGS_BP 8 +#define HW_RTC_STAT__NEW_REGS_BM 0xff00 +#define HW_RTC_STAT__STALE_REGS_BP 16 +#define HW_RTC_STAT__STALE_REGS_BM 0xff0000 +#define HW_RTC_STAT__XTAL32768_PRESENT (1 << 27) +#define HW_RTC_STAT__XTAL32000_PRESENT (1 << 28) +#define HW_RTC_STAT__WATCHDOG_PRESENT (1 << 29) +#define HW_RTC_STAT__ALARM_PRESENT (1 << 30) +#define HW_RTC_STAT__RTC_PRESENT (1 << 31) + +#define HW_RTC_MILLISECONDS (*(volatile uint32_t *)(HW_RTC_BASE + 0x20)) + +#define HW_RTC_SECONDS (*(volatile uint32_t *)(HW_RTC_BASE + 0x30)) + +#define HW_RTC_ALARM (*(volatile uint32_t *)(HW_RTC_BASE + 0x40)) + +#define HW_RTC_WATCHDOG (*(volatile uint32_t *)(HW_RTC_BASE + 0x50)) + +#define HW_RTC_PERSISTENTx(x) (*(volatile uint32_t *)(HW_RTC_BASE + 0x60 + (x) * 0x10)) #define HW_RTC_PERSISTENT0 (*(volatile uint32_t *)(HW_RTC_BASE + 0x60)) +#define HW_RTC_PERSISTENT0__CLOCKSOURCE (1 << 0) +#define HW_RTC_PERSISTENT0__ALARM_WAKE_EN (1 << 1) +#define HW_RTC_PERSISTENT0__ALARM_EN (1 << 2) +#define HW_RTC_PERSISTENT0__XTAL24MHZ_PWRUP (1 << 4) +#define HW_RTC_PERSISTENT0__XTAL32KHZ_PWRUP (1 << 5) +#define HW_RTC_PERSISTENT0__XTAL32_FREQ (1 << 6) +#define HW_RTC_PERSISTENT0__ALARM_WAKE (1 << 7) +#define HW_RTC_PERSISTENT0__AUTO_RESTART (1 << 17) #define HW_RTC_PERSISTENT0__SPARE_BP 18 #define HW_RTC_PERSISTENT0__SPARE_BM (0x3fff << 18) #define HW_RTC_PERSISTENT0__SPARE__RELEASE_GND (1 << 19) +#define HW_RTC_PERSISTENT1 (*(volatile uint32_t *)(HW_RTC_BASE + 0x70)) + +#define HW_RTC_PERSISTENT2 (*(volatile uint32_t *)(HW_RTC_BASE + 0x80)) + +#define HW_RTC_PERSISTENT3 (*(volatile uint32_t *)(HW_RTC_BASE + 0x90)) + +#define HW_RTC_PERSISTENT4 (*(volatile uint32_t *)(HW_RTC_BASE + 0xa0)) + +#define HW_RTC_PERSISTENT5 (*(volatile uint32_t *)(HW_RTC_BASE + 0xb0)) + +struct imx233_rtc_info_t +{ + uint32_t seconds; + uint32_t persistent[6]; +}; + +static inline void imx233_rtc_init(void) +{ + __REG_CLR(HW_RTC_CTRL) = __BLOCK_CLKGATE; +} + +static inline uint32_t imx233_rtc_read_seconds(void) +{ + return HW_RTC_SECONDS; +} + +static inline uint32_t imx233_rtc_read_persistent(int idx) +{ + return HW_RTC_PERSISTENTx(idx); +} + +void imx233_rtc_write_seconds(uint32_t seconds); +void imx233_rtc_write_persistent(int idx, uint32_t val); + +struct imx233_rtc_info_t imx233_rtc_get_info(void); + #endif /* RTC_IMX233_H */