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Mon, 30 Aug 2010 10:41:05 +0000 (GMT) Received: from localhost (dlhl0509.dlh.st.com [10.199.7.86]) by mail2.dlh.st.com (MOS 3.8.7a) with ESMTP id CUE02185 (AUTH viresh.kumar@st.com); Mon, 30 Aug 2010 16:11:05 +0530 (IST) From: Viresh KUMAR To: linux-arm-kernel@lists.infradead.org, a.zummo@towertech.it, rtc-linux@googlegroups.com Cc: Rajeev Kumar , shiraz.hashim@st.com, vipin.kumar@st.com, deepak.sikri@st.com, armando.visconti@st.com, vipulkumar.samar@st.com, pratyush.anand@st.com, bhupesh.sharma@st.com, Viresh Kumar Subject: [rtc-linux] [PATCH 15/74] ST SPEAr: adding support for rtc Date: Mon, 30 Aug 2010 16:11:00 +0530 Message-Id: X-Mailer: git-send-email 1.7.2.2 In-Reply-To: References: X-Original-Sender: viresh.kumar@st.com X-Original-Authentication-Results: gmr-mx.google.com; spf=neutral (google.com: 207.126.144.125 is neither permitted nor denied by best guess record for domain of viresh.kumar@st.com) smtp.mail=viresh.kumar@st.com Reply-To: rtc-linux@googlegroups.com Precedence: list Mailing-list: list rtc-linux@googlegroups.com; contact rtc-linux+owners@googlegroups.com List-ID: List-Post: , List-Help: , List-Archive: Sender: rtc-linux@googlegroups.com List-Subscribe: , List-Unsubscribe: , From: Rajeev Kumar Signed-off-by: Rajeev Kumar Signed-off-by: shiraz hashim Signed-off-by: Viresh Kumar --- arch/arm/mach-spear13xx/clock.c | 2 +- arch/arm/mach-spear13xx/include/mach/generic.h | 1 + arch/arm/mach-spear13xx/spear1300_evb.c | 1 + arch/arm/mach-spear13xx/spear13xx.c | 19 + arch/arm/mach-spear3xx/clock.c | 2 +- arch/arm/mach-spear3xx/include/mach/generic.h | 1 + arch/arm/mach-spear3xx/spear300_evb.c | 1 + arch/arm/mach-spear3xx/spear310_evb.c | 1 + arch/arm/mach-spear3xx/spear320_evb.c | 1 + arch/arm/mach-spear3xx/spear3xx.c | 19 + arch/arm/mach-spear6xx/clock.c | 2 +- arch/arm/mach-spear6xx/include/mach/generic.h | 1 + arch/arm/mach-spear6xx/spear600_evb.c | 1 + arch/arm/mach-spear6xx/spear6xx.c | 19 + drivers/rtc/Kconfig | 7 + drivers/rtc/Makefile | 1 + drivers/rtc/rtc-spear.c | 598 ++++++++++++++++++++++++ 17 files changed, 674 insertions(+), 3 deletions(-) create mode 100644 drivers/rtc/rtc-spear.c diff --git a/arch/arm/mach-spear13xx/clock.c b/arch/arm/mach-spear13xx/clock.c index cef3b13..cc692cc 100644 --- a/arch/arm/mach-spear13xx/clock.c +++ b/arch/arm/mach-spear13xx/clock.c @@ -736,7 +736,7 @@ static struct clk_lookup spear_clk_lookups[] = { {.con_id = "osc3_25m_clk", .clk = &osc3_25m_clk}, /* clock derived from 32 KHz osc clk */ - {.dev_id = "rtc", .clk = &rtc_clk}, + {.dev_id = "rtc-spear", .clk = &rtc_clk}, /* clock derived from 24/25 MHz osc1/osc3 clk */ {.con_id = "pll1_clk", .clk = &pll1_clk}, diff --git a/arch/arm/mach-spear13xx/include/mach/generic.h b/arch/arm/mach-spear13xx/include/mach/generic.h index 41c1a53..dc80421 100644 --- a/arch/arm/mach-spear13xx/include/mach/generic.h +++ b/arch/arm/mach-spear13xx/include/mach/generic.h @@ -30,6 +30,7 @@ /* Add spear13xx family device structure declarations here */ extern struct amba_device uart_device; +extern struct platform_device rtc_device; extern struct sys_timer spear13xx_timer; /* Add spear1300 machine device structure declarations here */ diff --git a/arch/arm/mach-spear13xx/spear1300_evb.c b/arch/arm/mach-spear13xx/spear1300_evb.c index d72c8a8..60c5fee 100644 --- a/arch/arm/mach-spear13xx/spear1300_evb.c +++ b/arch/arm/mach-spear13xx/spear1300_evb.c @@ -22,6 +22,7 @@ static struct amba_device *amba_devs[] __initdata = { }; static struct platform_device *plat_devs[] __initdata = { + &rtc_device, }; static void __init spear1300_evb_init(void) diff --git a/arch/arm/mach-spear13xx/spear13xx.c b/arch/arm/mach-spear13xx/spear13xx.c index d11e300..bdca713 100644 --- a/arch/arm/mach-spear13xx/spear13xx.c +++ b/arch/arm/mach-spear13xx/spear13xx.c @@ -37,6 +37,25 @@ struct amba_device uart_device = { .irq = {IRQ_UART, NO_IRQ}, }; +/* rtc device registration */ +static struct resource rtc_resources[] = { + { + .start = SPEAR13XX_RTC_BASE, + .end = SPEAR13XX_RTC_BASE + SZ_4K - 1, + .flags = IORESOURCE_MEM, + }, { + .start = IRQ_RTC, + .flags = IORESOURCE_IRQ, + }, +}; + +struct platform_device rtc_device = { + .name = "rtc-spear", + .id = -1, + .num_resources = ARRAY_SIZE(rtc_resources), + .resource = rtc_resources, +}; + /* Do spear13xx familiy common initialization part here */ void __init spear13xx_init(void) { diff --git a/arch/arm/mach-spear3xx/clock.c b/arch/arm/mach-spear3xx/clock.c index dc19666..147d0a3 100644 --- a/arch/arm/mach-spear3xx/clock.c +++ b/arch/arm/mach-spear3xx/clock.c @@ -467,7 +467,7 @@ static struct clk_lookup spear_clk_lookups[] = { { .con_id = "osc_32k_clk", .clk = &osc_32k_clk}, { .con_id = "osc_24m_clk", .clk = &osc_24m_clk}, /* clock derived from 32 KHz osc clk */ - { .dev_id = "rtc", .clk = &rtc_clk}, + { .dev_id = "rtc-spear", .clk = &rtc_clk}, /* clock derived from 24 MHz osc clk */ { .con_id = "pll1_clk", .clk = &pll1_clk}, { .con_id = "pll3_48m_clk", .clk = &pll3_48m_clk}, diff --git a/arch/arm/mach-spear3xx/include/mach/generic.h b/arch/arm/mach-spear3xx/include/mach/generic.h index d76ee98..408bb8d 100644 --- a/arch/arm/mach-spear3xx/include/mach/generic.h +++ b/arch/arm/mach-spear3xx/include/mach/generic.h @@ -33,6 +33,7 @@ /* Add spear3xx family device structure declarations here */ extern struct amba_device gpio_device; extern struct amba_device uart_device; +extern struct platform_device rtc_device; extern struct sys_timer spear3xx_timer; /* Add spear3xx family function declarations here */ diff --git a/arch/arm/mach-spear3xx/spear300_evb.c b/arch/arm/mach-spear3xx/spear300_evb.c index 3bb7fbc..392ee4a 100644 --- a/arch/arm/mach-spear3xx/spear300_evb.c +++ b/arch/arm/mach-spear3xx/spear300_evb.c @@ -44,6 +44,7 @@ static struct amba_device *amba_devs[] __initdata = { static struct platform_device *plat_devs[] __initdata = { /* spear3xx specific devices */ + &rtc_device, /* spear300 specific devices */ }; diff --git a/arch/arm/mach-spear3xx/spear310_evb.c b/arch/arm/mach-spear3xx/spear310_evb.c index 7dd93bd..15ca8fc 100644 --- a/arch/arm/mach-spear3xx/spear310_evb.c +++ b/arch/arm/mach-spear3xx/spear310_evb.c @@ -50,6 +50,7 @@ static struct amba_device *amba_devs[] __initdata = { static struct platform_device *plat_devs[] __initdata = { /* spear3xx specific devices */ + &rtc_device, /* spear310 specific devices */ &plgpio_device, diff --git a/arch/arm/mach-spear3xx/spear320_evb.c b/arch/arm/mach-spear3xx/spear320_evb.c index 82f4e76..48155cc 100644 --- a/arch/arm/mach-spear3xx/spear320_evb.c +++ b/arch/arm/mach-spear3xx/spear320_evb.c @@ -48,6 +48,7 @@ static struct amba_device *amba_devs[] __initdata = { static struct platform_device *plat_devs[] __initdata = { /* spear3xx specific devices */ + &rtc_device, /* spear320 specific devices */ &plgpio_device, diff --git a/arch/arm/mach-spear3xx/spear3xx.c b/arch/arm/mach-spear3xx/spear3xx.c index 89cf8ea..6d8791e 100644 --- a/arch/arm/mach-spear3xx/spear3xx.c +++ b/arch/arm/mach-spear3xx/spear3xx.c @@ -54,6 +54,25 @@ struct amba_device uart_device = { .irq = {IRQ_UART, NO_IRQ}, }; +/* rtc device registration */ +static struct resource rtc_resources[] = { + { + .start = SPEAR3XX_ICM3_RTC_BASE, + .end = SPEAR3XX_ICM3_RTC_BASE + SZ_4K - 1, + .flags = IORESOURCE_MEM, + }, { + .start = IRQ_BASIC_RTC, + .flags = IORESOURCE_IRQ, + }, +}; + +struct platform_device rtc_device = { + .name = "rtc-spear", + .id = -1, + .num_resources = ARRAY_SIZE(rtc_resources), + .resource = rtc_resources, +}; + /* Do spear3xx familiy common initialization part here */ void __init spear3xx_init(void) { diff --git a/arch/arm/mach-spear6xx/clock.c b/arch/arm/mach-spear6xx/clock.c index 4a91991..66fc622 100644 --- a/arch/arm/mach-spear6xx/clock.c +++ b/arch/arm/mach-spear6xx/clock.c @@ -569,7 +569,7 @@ static struct clk_lookup spear_clk_lookups[] = { { .con_id = "osc_32k_clk", .clk = &osc_32k_clk}, { .con_id = "osc_30m_clk", .clk = &osc_30m_clk}, /* clock derived from 32 KHz os clk */ - { .dev_id = "rtc", .clk = &rtc_clk}, + { .dev_id = "rtc-spear", .clk = &rtc_clk}, /* clock derived from 30 MHz os clk */ { .con_id = "pll1_clk", .clk = &pll1_clk}, { .con_id = "pll3_48m_clk", .clk = &pll3_48m_clk}, diff --git a/arch/arm/mach-spear6xx/include/mach/generic.h b/arch/arm/mach-spear6xx/include/mach/generic.h index d6a04f2..674b16c 100644 --- a/arch/arm/mach-spear6xx/include/mach/generic.h +++ b/arch/arm/mach-spear6xx/include/mach/generic.h @@ -32,6 +32,7 @@ extern struct amba_device clcd_device; extern struct amba_device gpio_device[]; extern struct amba_device uart_device[]; +extern struct platform_device rtc_device; extern struct sys_timer spear6xx_timer; /* Add spear6xx family function declarations here */ diff --git a/arch/arm/mach-spear6xx/spear600_evb.c b/arch/arm/mach-spear6xx/spear600_evb.c index 88e69f4..861e83d 100644 --- a/arch/arm/mach-spear6xx/spear600_evb.c +++ b/arch/arm/mach-spear6xx/spear600_evb.c @@ -26,6 +26,7 @@ static struct amba_device *amba_devs[] __initdata = { }; static struct platform_device *plat_devs[] __initdata = { + &rtc_device, }; static void __init spear600_evb_init(void) diff --git a/arch/arm/mach-spear6xx/spear6xx.c b/arch/arm/mach-spear6xx/spear6xx.c index d0f6b9d..1e403cb 100644 --- a/arch/arm/mach-spear6xx/spear6xx.c +++ b/arch/arm/mach-spear6xx/spear6xx.c @@ -121,6 +121,25 @@ struct amba_device gpio_device[] = { } }; +/* rtc device registration */ +static struct resource rtc_resources[] = { + { + .start = SPEAR6XX_ICM3_RTC_BASE, + .end = SPEAR6XX_ICM3_RTC_BASE + SZ_4K - 1, + .flags = IORESOURCE_MEM, + }, { + .start = IRQ_BASIC_RTC, + .flags = IORESOURCE_IRQ, + }, +}; + +struct platform_device rtc_device = { + .name = "rtc-spear", + .id = -1, + .num_resources = ARRAY_SIZE(rtc_resources), + .resource = rtc_resources, +}; + /* This will add devices, and do machine specific tasks */ void __init spear6xx_init(void) { diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 48ca713..f099473 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -625,6 +625,13 @@ config RTC_DRV_WM8350 This driver can also be built as a module. If so, the module will be called "rtc-wm8350". +config RTC_DRV_SPEAR + tristate "SPEAR ST RTC" + default y + help + If you say Y here you will get support for the RTC found on + spear + config RTC_DRV_PCF50633 depends on MFD_PCF50633 tristate "NXP PCF50633 RTC" diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 0f207b3..44df01a 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -86,6 +86,7 @@ obj-$(CONFIG_RTC_DRV_S35390A) += rtc-s35390a.o obj-$(CONFIG_RTC_DRV_S3C) += rtc-s3c.o obj-$(CONFIG_RTC_DRV_SA1100) += rtc-sa1100.o obj-$(CONFIG_RTC_DRV_SH) += rtc-sh.o +obj-$(CONFIG_RTC_DRV_SPEAR) += rtc-spear.o obj-$(CONFIG_RTC_DRV_STARFIRE) += rtc-starfire.o obj-$(CONFIG_RTC_DRV_STK17TA8) += rtc-stk17ta8.o obj-$(CONFIG_RTC_DRV_STMP) += rtc-stmp3xxx.o diff --git a/drivers/rtc/rtc-spear.c b/drivers/rtc/rtc-spear.c new file mode 100644 index 0000000..5b49124 --- /dev/null +++ b/drivers/rtc/rtc-spear.c @@ -0,0 +1,598 @@ +/* + * drivers/rtc/rtc-spear.c + * + * Copyright (C) 2010 ST Microelectronics + * Rajeev Kumar + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* 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 clk *clk; + spinlock_t lock; + void __iomem *ioaddr; +}; + +static inline void spear_rtc_clear_interrupt(struct spear_rtc_config *config) +{ + unsigned int val; + unsigned long flags; + + spin_lock_irqsave(&config->lock, flags); + val = readl(config->ioaddr + STATUS_REG); + val |= RTC_INT_MASK; + writel(val, config->ioaddr + STATUS_REG); + spin_unlock_irqrestore(&config->lock, flags); +} + +static inline void spear_rtc_enable_interrupt(struct spear_rtc_config *config) +{ + unsigned int val; + + val = readl(config->ioaddr + CTRL_REG); + if (!(val & INT_ENABLE)) { + spear_rtc_clear_interrupt(config); + val |= INT_ENABLE; + writel(val, config->ioaddr + CTRL_REG); + } +} + +static inline void spear_rtc_disable_interrupt(struct spear_rtc_config *config) +{ + unsigned int val; + + val = readl(config->ioaddr + CTRL_REG); + if (val & INT_ENABLE) { + val &= ~INT_ENABLE; + writel(val, config->ioaddr + CTRL_REG); + } +} + +static inline int is_write_complete(struct spear_rtc_config *config) +{ + int ret = 0; + unsigned long flags; + + spin_lock_irqsave(&config->lock, flags); + if ((readl(config->ioaddr + STATUS_REG)) & STATUS_FAIL) + ret = -EIO; + spin_unlock_irqrestore(&config->lock, flags); + + return ret; +} + +static void rtc_wait_not_busy(struct spear_rtc_config *config) +{ + int status, count = 0; + unsigned long flags; + + /* Assuming BUSY may stay active for 80 msec) */ + for (count = 0; count < 80; count++) { + spin_lock_irqsave(&config->lock, flags); + status = readl(config->ioaddr + STATUS_REG); + spin_unlock_irqrestore(&config->lock, flags); + if ((status & STATUS_BUSY) == 0) + break; + /* check status busy, after each msec */ + msleep(1); + } +} + +static irqreturn_t spear_rtc_irq(int irq, void *dev_id) +{ + struct rtc_device *rtc = (struct rtc_device *)dev_id; + struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + unsigned long flags, events = 0; + unsigned int irq_data; + + spin_lock_irqsave(&config->lock, flags); + irq_data = readl(config->ioaddr + STATUS_REG); + spin_unlock_irqrestore(&config->lock, flags); + + if ((irq_data & RTC_INT_MASK)) { + spear_rtc_clear_interrupt(config); + events = RTC_IRQF | RTC_AF; + rtc_update_irq(rtc, 1, events); + return IRQ_HANDLED; + } else + return IRQ_NONE; + +} + +static int tm2bcd(struct rtc_time *tm) +{ + if (rtc_valid_tm(tm) != 0) + return -EINVAL; + tm->tm_sec = bin2bcd(tm->tm_sec); + tm->tm_min = bin2bcd(tm->tm_min); + tm->tm_hour = bin2bcd(tm->tm_hour); + tm->tm_mday = bin2bcd(tm->tm_mday); + tm->tm_mon = bin2bcd(tm->tm_mon + 1); + tm->tm_year = bin2bcd(tm->tm_year); + + return 0; +} + +static void bcd2tm(struct rtc_time *tm) +{ + tm->tm_sec = bcd2bin(tm->tm_sec); + tm->tm_min = bcd2bin(tm->tm_min); + tm->tm_hour = bcd2bin(tm->tm_hour); + tm->tm_mday = bcd2bin(tm->tm_mday); + tm->tm_mon = bcd2bin(tm->tm_mon) - 1; + /* epoch == 1900 */ + tm->tm_year = bcd2bin(tm->tm_year); +} + +/* + * spear_rtc_read_time - set the time + * @dev: rtc device in use + * @tm: holds date and time + * + * This function read time and date. On success it will return 0 + * otherwise -ve error is returned. + */ +static int spear_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_device *rtc = platform_get_drvdata(pdev); + struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + unsigned int time, date; + + /* we don't report wday/yday/isdst ... */ + rtc_wait_not_busy(config); + + time = readl(config->ioaddr + TIME_REG); + date = readl(config->ioaddr + DATE_REG); + tm->tm_sec = (time >> SECOND_SHIFT) & SECOND_MASK; + tm->tm_min = (time >> MINUTE_SHIFT) & MIN_MASK; + tm->tm_hour = (time >> HOUR_SHIFT) & HOUR_MASK; + tm->tm_mday = (date >> MDAY_SHIFT) & DAY_MASK; + tm->tm_mon = (date >> MONTH_SHIFT) & MONTH_MASK; + tm->tm_year = (date >> YEAR_SHIFT) & YEAR_MASK; + + bcd2tm(tm); + return 0; +} + +/* + * spear_rtc_set_time - set the time + * @dev: rtc device in use + * @tm: holds date and time + * + * This function set time and date. On success it will return 0 + * otherwise -ve error is returned. + */ +static int spear_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_device *rtc = platform_get_drvdata(pdev); + struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + unsigned int time, date, err = 0; + + if (tm2bcd(tm) < 0) + return -EINVAL; + + rtc_wait_not_busy(config); + time = (tm->tm_sec << SECOND_SHIFT) | (tm->tm_min << MINUTE_SHIFT) | + (tm->tm_hour << HOUR_SHIFT); + date = (tm->tm_mday << MDAY_SHIFT) | (tm->tm_mon << MONTH_SHIFT) | + (tm->tm_year << YEAR_SHIFT); + writel(time, config->ioaddr + TIME_REG); + writel(date, config->ioaddr + DATE_REG); + err = is_write_complete(config); + if (err < 0) + return err; + + return 0; +} + +/* + * spear_rtc_read_alarm - read the alarm time + * @dev: rtc device in use + * @alm: holds alarm date and time + * + * This function read alarm time and date. On success it will return 0 + * otherwise -ve error is returned. + */ +static int spear_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_device *rtc = platform_get_drvdata(pdev); + struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + unsigned int time, date; + + rtc_wait_not_busy(config); + + time = readl(config->ioaddr + ALARM_TIME_REG); + date = readl(config->ioaddr + ALARM_DATE_REG); + alm->time.tm_sec = (time >> SECOND_SHIFT) & SECOND_MASK; + alm->time.tm_min = (time >> MINUTE_SHIFT) & MIN_MASK; + alm->time.tm_hour = (time >> HOUR_SHIFT) & HOUR_MASK; + alm->time.tm_mday = (date >> MDAY_SHIFT) & DAY_MASK; + alm->time.tm_mon = (date >> MONTH_SHIFT) & MONTH_MASK; + alm->time.tm_year = (date >> YEAR_SHIFT) & YEAR_MASK; + + bcd2tm(&alm->time); + alm->enabled = readl(config->ioaddr + CTRL_REG) & INT_ENABLE; + + return 0; +} + +/* + * spear_rtc_set_alarm - set the alarm time + * @dev: rtc device in use + * @alm: holds alarm date and time + * + * This function set alarm time and date. On success it will return 0 + * otherwise -ve error is returned. + */ +static int spear_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_device *rtc = platform_get_drvdata(pdev); + struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + unsigned int time, date, err = 0; + + if (tm2bcd(&alm->time) < 0) + return -EINVAL; + + rtc_wait_not_busy(config); + + time = (alm->time.tm_sec << SECOND_SHIFT) | (alm->time.tm_min << + MINUTE_SHIFT) | (alm->time.tm_hour << HOUR_SHIFT); + date = (alm->time.tm_mday << MDAY_SHIFT) | (alm->time.tm_mon << + MONTH_SHIFT) | (alm->time.tm_year << YEAR_SHIFT); + + writel(time, config->ioaddr + ALARM_TIME_REG); + writel(date, config->ioaddr + ALARM_DATE_REG); + err = is_write_complete(config); + if (err < 0) + return err; + + if (alm->enabled) + spear_rtc_enable_interrupt(config); + else + spear_rtc_disable_interrupt(config); + + return 0; +} + +#ifdef CONFIG_RTC_INTF_DEV +static int +spear_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_device *rtc = platform_get_drvdata(pdev); + struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + struct rtc_time tm; + struct rtc_wkalrm alm; + void __user *uarg = (void __user *)arg; + int err = 0; + + switch (cmd) { + /* AIE = Alarm Interrupt Enable */ + case RTC_AIE_OFF: + spear_rtc_disable_interrupt(config); + break; + case RTC_AIE_ON: + spear_rtc_enable_interrupt(config); + break; + case RTC_SET_TIME: + if (copy_from_user(&tm, uarg, sizeof(tm))) + return -EFAULT; + return spear_rtc_set_time(dev, &tm); + case RTC_RD_TIME: + err = spear_rtc_read_time(dev, &tm); + if (err < 0) + return err; + + if (copy_to_user(uarg, &tm, sizeof(tm))) + return -EFAULT; + break; + case RTC_ALM_SET: + if (copy_from_user(&alm.time, uarg, sizeof(tm))) + return -EFAULT; + alm.enabled = 0; + alm.pending = 0; + spear_rtc_set_alarm(dev, &alm); + break; + case RTC_ALM_READ: + err = spear_rtc_read_alarm(dev, &alm); + if (err < 0) + return err; + + if (copy_to_user(uarg, &alm.time, sizeof(tm))) + return -EFAULT; + break; + default: + return -ENOIOCTLCMD; + } + + return 0; +} + +#else +#define spear_rtc_ioctl NULL +#endif + +static struct rtc_class_ops spear_rtc_ops = { + .ioctl = spear_rtc_ioctl, + .read_time = spear_rtc_read_time, + .set_time = spear_rtc_set_time, + .read_alarm = spear_rtc_read_alarm, + .set_alarm = spear_rtc_set_alarm, +}; + +static int __devinit spear_rtc_probe(struct platform_device *pdev) +{ + struct resource *res; + struct rtc_device *rtc; + struct spear_rtc_config *config; + unsigned int status = 0; + int irq; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "no resource defined\n"); + return -EBUSY; + } + if (!request_mem_region(res->start, resource_size(res), pdev->name)) { + dev_err(&pdev->dev, "rtc region already claimed\n"); + return -EBUSY; + } + + config = kzalloc(sizeof(*config), GFP_KERNEL); + if (!config) { + dev_err(&pdev->dev, "out of memory\n"); + status = -ENOMEM; + goto err_release_region; + } + + config->clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(config->clk)) { + status = PTR_ERR(config->clk); + goto err_kfree; + } + + status = clk_enable(config->clk); + if (status < 0) + goto err_clk_put; + + config->ioaddr = ioremap(res->start, resource_size(res)); + if (!config->ioaddr) { + dev_err(&pdev->dev, "ioremap fail\n"); + status = -ENOMEM; + goto err_disable_clock; + } + + rtc = rtc_device_register(pdev->name, &pdev->dev, &spear_rtc_ops, + THIS_MODULE); + if (IS_ERR(rtc)) { + dev_err(&pdev->dev, "can't register RTC device, err %ld\n", + PTR_ERR(rtc)); + status = PTR_ERR(rtc); + goto err_iounmap; + } + platform_set_drvdata(pdev, rtc); + dev_set_drvdata(&rtc->dev, config); + + spin_lock_init(&config->lock); + + /* alarm irqs */ + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "no update irq?\n"); + status = irq; + goto err_clear_platdata; + } + + status = request_irq(irq, spear_rtc_irq, 0, pdev->name, rtc); + if (status) { + dev_err(&pdev->dev, "Alarm interrupt IRQ%d already \ + claimed\n", irq); + goto err_clear_platdata; + } + + if (!device_can_wakeup(&pdev->dev)) + device_init_wakeup(&pdev->dev, 1); + + return 0; + +err_clear_platdata: + platform_set_drvdata(pdev, NULL); + dev_set_drvdata(&rtc->dev, NULL); + rtc_device_unregister(rtc); +err_iounmap: + iounmap(config->ioaddr); +err_disable_clock: + clk_disable(config->clk); +err_clk_put: + clk_put(config->clk); +err_kfree: + kfree(config); +err_release_region: + release_mem_region(res->start, resource_size(res)); + + return status; +} + +static int __devexit spear_rtc_remove(struct platform_device *pdev) +{ + struct rtc_device *rtc = platform_get_drvdata(pdev); + struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + int irq; + struct resource *res; + + /* leave rtc running, but disable irqs */ + spear_rtc_disable_interrupt(config); + device_init_wakeup(&pdev->dev, 0); + irq = platform_get_irq(pdev, 0); + if (irq) + free_irq(irq, pdev); + clk_disable(config->clk); + clk_put(config->clk); + iounmap(config->ioaddr); + kfree(config); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (res) + release_mem_region(res->start, resource_size(res)); + platform_set_drvdata(pdev, NULL); + dev_set_drvdata(&rtc->dev, NULL); + rtc_device_unregister(rtc); + + return 0; +} + +#ifdef CONFIG_PM + +static int spear_rtc_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct rtc_device *rtc = platform_get_drvdata(pdev); + struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + int irq; + + irq = platform_get_irq(pdev, 0); + if (device_may_wakeup(&pdev->dev)) + enable_irq_wake(irq); + else { + spear_rtc_disable_interrupt(config); + clk_disable(config->clk); + } + + return 0; +} + +static int spear_rtc_resume(struct platform_device *pdev) +{ + struct rtc_device *rtc = platform_get_drvdata(pdev); + struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + int irq; + + irq = platform_get_irq(pdev, 0); + + if (device_may_wakeup(&pdev->dev)) + disable_irq_wake(irq); + else { + clk_enable(config->clk); + spear_rtc_enable_interrupt(config); + } + + return 0; +} + +#else +#define spear_rtc_suspend NULL +#define spear_rtc_resume NULL +#endif + +static void spear_rtc_shutdown(struct platform_device *pdev) +{ + struct rtc_device *rtc = platform_get_drvdata(pdev); + struct spear_rtc_config *config = dev_get_drvdata(&rtc->dev); + + spear_rtc_disable_interrupt(config); + clk_disable(config->clk); +} + +static struct platform_driver spear_rtc_driver = { + .probe = spear_rtc_probe, + .remove = __devexit_p(spear_rtc_remove), + .suspend = spear_rtc_suspend, + .resume = spear_rtc_resume, + .shutdown = spear_rtc_shutdown, + .driver = { + .name = "rtc-spear", + .owner = THIS_MODULE, + }, +}; + +static int __init rtc_init(void) +{ + return platform_driver_register(&spear_rtc_driver); +} +module_init(rtc_init); + +static void __exit rtc_exit(void) +{ + platform_driver_unregister(&spear_rtc_driver); +} +module_exit(rtc_exit); + +MODULE_ALIAS("rtc-spear"); +MODULE_AUTHOR("Rajeev Kumar"); +MODULE_LICENSE("GPL");