linux-imx

/*

 * drivers/rtc/rtc-spear.c

 *

 * Copyright (C) 2010 ST Microelectronics

 * Rajeev Kumar<rajeev-dlh.kumar@st.com>

 *

 * This file is licensed under the terms of the GNU General Public

 * License version 2. This program is licensed "as is" without any

 * warranty of any kind, whether express or implied.

 */

​

#include <linux/bcd.h>

#include <linux/clk.h>

#include <linux/delay.h>

#include <linux/init.h>

#include <linux/io.h>

#include <linux/irq.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/rtc.h>

#include <linux/slab.h>

#include <linux/spinlock.h>

​

/* RTC registers */

#define TIME_REG        0x00

#define DATE_REG        0x04

#define ALARM_TIME_REG      0x08

#define ALARM_DATE_REG      0x0C

#define CTRL_REG        0x10

#define STATUS_REG      0x14

​

/* TIME_REG & ALARM_TIME_REG */

#define SECONDS_UNITS       (0xf<<0)    /* seconds units position */

#define SECONDS_TENS        (0x7<<4)    /* seconds tens position */

#define MINUTES_UNITS       (0xf<<8)    /* minutes units position */

#define MINUTES_TENS        (0x7<<12)   /* minutes tens position */

#define HOURS_UNITS     (0xf<<16)   /* hours units position */

#define HOURS_TENS      (0x3<<20)   /* hours tens position */

​

/* DATE_REG & ALARM_DATE_REG */

#define DAYS_UNITS      (0xf<<0)    /* days units position */

#define DAYS_TENS       (0x3<<4)    /* days tens position */

#define MONTHS_UNITS        (0xf<<8)    /* months units position */

#define MONTHS_TENS     (0x1<<12)   /* months tens position */

#define YEARS_UNITS     (0xf<<16)   /* years units position */

#define YEARS_TENS      (0xf<<20)   /* years tens position */

#define YEARS_HUNDREDS      (0xf<<24)   /* years hundereds position */

#define YEARS_MILLENIUMS    (0xf<<28)   /* years millenium position */

​

/* MASK SHIFT TIME_REG & ALARM_TIME_REG*/

#define SECOND_SHIFT        0x00        /* seconds units */

#define MINUTE_SHIFT        0x08        /* minutes units position */

#define HOUR_SHIFT      0x10        /* hours units position */

#define MDAY_SHIFT      0x00        /* Month day shift */

#define MONTH_SHIFT     0x08        /* Month shift */

#define YEAR_SHIFT      0x10        /* Year shift */

​

#define SECOND_MASK     0x7F

#define MIN_MASK        0x7F

#define HOUR_MASK       0x3F

#define DAY_MASK        0x3F

#define MONTH_MASK      0x7F

#define YEAR_MASK       0xFFFF

​

/* date reg equal to time reg, for debug only */

#define TIME_BYP        (1<<9)

#define INT_ENABLE      (1<<31)     /* interrupt enable */

​

/* STATUS_REG */

#define CLK_UNCONNECTED     (1<<0)

#define PEND_WR_TIME        (1<<2)

#define PEND_WR_DATE        (1<<3)

#define LOST_WR_TIME        (1<<4)

#define LOST_WR_DATE        (1<<5)

#define RTC_INT_MASK        (1<<31)

#define STATUS_BUSY     (PEND_WR_TIME | PEND_WR_DATE)

#define STATUS_FAIL     (LOST_WR_TIME | LOST_WR_DATE)

​

struct spear_rtc_config {

    struct rtc_device *rtc;

    struct clk *clk;

    spinlock_t lock;

    void __iomem *ioaddr;

    unsigned int irq_wake;

};

​

static inline void spear_rtc_clear_interrupt(struct spear_rtc_config *config)

{

    unsigned int val;

    unsigned long flags;

​