mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 14:56:39 +07:00
ed402af3c2
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (112 commits) sh: Move SH-4 CPU headers down one more level. sh: Only build in gpio.o when CONFIG_GENERIC_GPIO is selected. sh: Migrate common board headers to mach-common/. sh: Move the CPU definition headers from asm/ to cpu/. serial: sh-sci: Add support SCIF of SH7723 video: add sh_mobile_lcdc platform flags video: remove unused sh_mobile_lcdc platform data sh: remove consistent alloc cruft sh: add dynamic crash base address support sh: reduce Migo-R smc91x overruns sh: Fix up some merge damage. Fix debugfs_create_file's error checking method for arch/sh/mm/ Fix debugfs_create_dir's error checking method for arch/sh/kernel/ sh: ap325rxa: Add support RTC RX-8564LC in AP325RXA board sh: Use sh7720 GPIO on magicpanelr2 board sh: Add sh7720 pinmux code sh: Use sh7203 GPIO on rsk7203 board sh: Add sh7203 pinmux code sh: Use sh7723 GPIO on AP325RXA board sh: Add sh7723 pinmux code ...
750 lines
18 KiB
C
750 lines
18 KiB
C
/*
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* SuperH On-Chip RTC Support
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*
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* Copyright (C) 2006, 2007, 2008 Paul Mundt
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* Copyright (C) 2006 Jamie Lenehan
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* Copyright (C) 2008 Angelo Castello
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*
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* Based on the old arch/sh/kernel/cpu/rtc.c by:
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*
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* Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
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* Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/bcd.h>
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#include <linux/rtc.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/seq_file.h>
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#include <linux/interrupt.h>
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#include <linux/spinlock.h>
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#include <linux/io.h>
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#include <asm/rtc.h>
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#define DRV_NAME "sh-rtc"
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#define DRV_VERSION "0.2.0"
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#define RTC_REG(r) ((r) * rtc_reg_size)
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#define R64CNT RTC_REG(0)
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#define RSECCNT RTC_REG(1) /* RTC sec */
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#define RMINCNT RTC_REG(2) /* RTC min */
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#define RHRCNT RTC_REG(3) /* RTC hour */
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#define RWKCNT RTC_REG(4) /* RTC week */
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#define RDAYCNT RTC_REG(5) /* RTC day */
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#define RMONCNT RTC_REG(6) /* RTC month */
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#define RYRCNT RTC_REG(7) /* RTC year */
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#define RSECAR RTC_REG(8) /* ALARM sec */
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#define RMINAR RTC_REG(9) /* ALARM min */
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#define RHRAR RTC_REG(10) /* ALARM hour */
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#define RWKAR RTC_REG(11) /* ALARM week */
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#define RDAYAR RTC_REG(12) /* ALARM day */
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#define RMONAR RTC_REG(13) /* ALARM month */
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#define RCR1 RTC_REG(14) /* Control */
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#define RCR2 RTC_REG(15) /* Control */
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/*
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* Note on RYRAR and RCR3: Up until this point most of the register
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* definitions are consistent across all of the available parts. However,
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* the placement of the optional RYRAR and RCR3 (the RYRAR control
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* register used to control RYRCNT/RYRAR compare) varies considerably
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* across various parts, occasionally being mapped in to a completely
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* unrelated address space. For proper RYRAR support a separate resource
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* would have to be handed off, but as this is purely optional in
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* practice, we simply opt not to support it, thereby keeping the code
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* quite a bit more simplified.
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*/
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/* ALARM Bits - or with BCD encoded value */
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#define AR_ENB 0x80 /* Enable for alarm cmp */
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/* Period Bits */
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#define PF_HP 0x100 /* Enable Half Period to support 8,32,128Hz */
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#define PF_COUNT 0x200 /* Half periodic counter */
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#define PF_OXS 0x400 /* Periodic One x Second */
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#define PF_KOU 0x800 /* Kernel or User periodic request 1=kernel */
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#define PF_MASK 0xf00
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/* RCR1 Bits */
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#define RCR1_CF 0x80 /* Carry Flag */
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#define RCR1_CIE 0x10 /* Carry Interrupt Enable */
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#define RCR1_AIE 0x08 /* Alarm Interrupt Enable */
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#define RCR1_AF 0x01 /* Alarm Flag */
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/* RCR2 Bits */
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#define RCR2_PEF 0x80 /* PEriodic interrupt Flag */
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#define RCR2_PESMASK 0x70 /* Periodic interrupt Set */
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#define RCR2_RTCEN 0x08 /* ENable RTC */
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#define RCR2_ADJ 0x04 /* ADJustment (30-second) */
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#define RCR2_RESET 0x02 /* Reset bit */
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#define RCR2_START 0x01 /* Start bit */
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struct sh_rtc {
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void __iomem *regbase;
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unsigned long regsize;
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struct resource *res;
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unsigned int alarm_irq, periodic_irq, carry_irq;
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struct rtc_device *rtc_dev;
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spinlock_t lock;
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unsigned long capabilities; /* See asm-sh/rtc.h for cap bits */
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unsigned short periodic_freq;
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};
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static irqreturn_t sh_rtc_interrupt(int irq, void *dev_id)
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{
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struct sh_rtc *rtc = dev_id;
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unsigned int tmp;
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spin_lock(&rtc->lock);
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tmp = readb(rtc->regbase + RCR1);
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tmp &= ~RCR1_CF;
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writeb(tmp, rtc->regbase + RCR1);
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/* Users have requested One x Second IRQ */
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if (rtc->periodic_freq & PF_OXS)
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rtc_update_irq(rtc->rtc_dev, 1, RTC_UF | RTC_IRQF);
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spin_unlock(&rtc->lock);
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return IRQ_HANDLED;
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}
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static irqreturn_t sh_rtc_alarm(int irq, void *dev_id)
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{
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struct sh_rtc *rtc = dev_id;
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unsigned int tmp;
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spin_lock(&rtc->lock);
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tmp = readb(rtc->regbase + RCR1);
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tmp &= ~(RCR1_AF | RCR1_AIE);
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writeb(tmp, rtc->regbase + RCR1);
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rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF);
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spin_unlock(&rtc->lock);
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return IRQ_HANDLED;
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}
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static irqreturn_t sh_rtc_periodic(int irq, void *dev_id)
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{
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struct sh_rtc *rtc = dev_id;
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struct rtc_device *rtc_dev = rtc->rtc_dev;
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unsigned int tmp;
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spin_lock(&rtc->lock);
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tmp = readb(rtc->regbase + RCR2);
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tmp &= ~RCR2_PEF;
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writeb(tmp, rtc->regbase + RCR2);
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/* Half period enabled than one skipped and the next notified */
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if ((rtc->periodic_freq & PF_HP) && (rtc->periodic_freq & PF_COUNT))
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rtc->periodic_freq &= ~PF_COUNT;
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else {
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if (rtc->periodic_freq & PF_HP)
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rtc->periodic_freq |= PF_COUNT;
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if (rtc->periodic_freq & PF_KOU) {
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spin_lock(&rtc_dev->irq_task_lock);
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if (rtc_dev->irq_task)
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rtc_dev->irq_task->func(rtc_dev->irq_task->private_data);
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spin_unlock(&rtc_dev->irq_task_lock);
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} else
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rtc_update_irq(rtc->rtc_dev, 1, RTC_PF | RTC_IRQF);
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}
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spin_unlock(&rtc->lock);
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return IRQ_HANDLED;
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}
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static inline void sh_rtc_setpie(struct device *dev, unsigned int enable)
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{
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struct sh_rtc *rtc = dev_get_drvdata(dev);
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unsigned int tmp;
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spin_lock_irq(&rtc->lock);
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tmp = readb(rtc->regbase + RCR2);
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if (enable) {
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tmp &= ~RCR2_PEF; /* Clear PES bit */
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tmp |= (rtc->periodic_freq & ~PF_HP); /* Set PES2-0 */
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} else
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tmp &= ~(RCR2_PESMASK | RCR2_PEF);
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writeb(tmp, rtc->regbase + RCR2);
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spin_unlock_irq(&rtc->lock);
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}
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static inline int sh_rtc_setfreq(struct device *dev, unsigned int freq)
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{
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struct sh_rtc *rtc = dev_get_drvdata(dev);
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int tmp, ret = 0;
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spin_lock_irq(&rtc->lock);
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tmp = rtc->periodic_freq & PF_MASK;
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switch (freq) {
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case 0:
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rtc->periodic_freq = 0x00;
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break;
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case 1:
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rtc->periodic_freq = 0x60;
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break;
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case 2:
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rtc->periodic_freq = 0x50;
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break;
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case 4:
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rtc->periodic_freq = 0x40;
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break;
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case 8:
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rtc->periodic_freq = 0x30 | PF_HP;
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break;
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case 16:
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rtc->periodic_freq = 0x30;
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break;
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case 32:
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rtc->periodic_freq = 0x20 | PF_HP;
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break;
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case 64:
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rtc->periodic_freq = 0x20;
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break;
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case 128:
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rtc->periodic_freq = 0x10 | PF_HP;
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break;
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case 256:
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rtc->periodic_freq = 0x10;
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break;
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default:
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ret = -ENOTSUPP;
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}
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if (ret == 0) {
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rtc->periodic_freq |= tmp;
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rtc->rtc_dev->irq_freq = freq;
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}
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spin_unlock_irq(&rtc->lock);
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return ret;
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}
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static inline void sh_rtc_setaie(struct device *dev, unsigned int enable)
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{
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struct sh_rtc *rtc = dev_get_drvdata(dev);
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unsigned int tmp;
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spin_lock_irq(&rtc->lock);
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tmp = readb(rtc->regbase + RCR1);
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if (!enable)
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tmp &= ~RCR1_AIE;
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else
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tmp |= RCR1_AIE;
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writeb(tmp, rtc->regbase + RCR1);
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spin_unlock_irq(&rtc->lock);
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}
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static int sh_rtc_proc(struct device *dev, struct seq_file *seq)
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{
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struct sh_rtc *rtc = dev_get_drvdata(dev);
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unsigned int tmp;
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tmp = readb(rtc->regbase + RCR1);
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seq_printf(seq, "carry_IRQ\t: %s\n", (tmp & RCR1_CIE) ? "yes" : "no");
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tmp = readb(rtc->regbase + RCR2);
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seq_printf(seq, "periodic_IRQ\t: %s\n",
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(tmp & RCR2_PESMASK) ? "yes" : "no");
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return 0;
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}
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static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
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{
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struct sh_rtc *rtc = dev_get_drvdata(dev);
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unsigned int ret = 0;
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switch (cmd) {
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case RTC_PIE_OFF:
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case RTC_PIE_ON:
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sh_rtc_setpie(dev, cmd == RTC_PIE_ON);
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break;
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case RTC_AIE_OFF:
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case RTC_AIE_ON:
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sh_rtc_setaie(dev, cmd == RTC_AIE_ON);
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break;
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case RTC_UIE_OFF:
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rtc->periodic_freq &= ~PF_OXS;
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break;
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case RTC_UIE_ON:
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rtc->periodic_freq |= PF_OXS;
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break;
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case RTC_IRQP_READ:
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ret = put_user(rtc->rtc_dev->irq_freq,
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(unsigned long __user *)arg);
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break;
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case RTC_IRQP_SET:
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ret = sh_rtc_setfreq(dev, arg);
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break;
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default:
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ret = -ENOIOCTLCMD;
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}
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return ret;
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}
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static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct sh_rtc *rtc = platform_get_drvdata(pdev);
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unsigned int sec128, sec2, yr, yr100, cf_bit;
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do {
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unsigned int tmp;
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spin_lock_irq(&rtc->lock);
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tmp = readb(rtc->regbase + RCR1);
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tmp &= ~RCR1_CF; /* Clear CF-bit */
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tmp |= RCR1_CIE;
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writeb(tmp, rtc->regbase + RCR1);
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sec128 = readb(rtc->regbase + R64CNT);
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tm->tm_sec = bcd2bin(readb(rtc->regbase + RSECCNT));
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tm->tm_min = bcd2bin(readb(rtc->regbase + RMINCNT));
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tm->tm_hour = bcd2bin(readb(rtc->regbase + RHRCNT));
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tm->tm_wday = bcd2bin(readb(rtc->regbase + RWKCNT));
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tm->tm_mday = bcd2bin(readb(rtc->regbase + RDAYCNT));
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tm->tm_mon = bcd2bin(readb(rtc->regbase + RMONCNT)) - 1;
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if (rtc->capabilities & RTC_CAP_4_DIGIT_YEAR) {
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yr = readw(rtc->regbase + RYRCNT);
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yr100 = bcd2bin(yr >> 8);
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yr &= 0xff;
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} else {
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yr = readb(rtc->regbase + RYRCNT);
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yr100 = bcd2bin((yr == 0x99) ? 0x19 : 0x20);
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}
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tm->tm_year = (yr100 * 100 + bcd2bin(yr)) - 1900;
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sec2 = readb(rtc->regbase + R64CNT);
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cf_bit = readb(rtc->regbase + RCR1) & RCR1_CF;
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spin_unlock_irq(&rtc->lock);
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} while (cf_bit != 0 || ((sec128 ^ sec2) & RTC_BIT_INVERTED) != 0);
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#if RTC_BIT_INVERTED != 0
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if ((sec128 & RTC_BIT_INVERTED))
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tm->tm_sec--;
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#endif
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dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
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"mday=%d, mon=%d, year=%d, wday=%d\n",
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__func__,
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tm->tm_sec, tm->tm_min, tm->tm_hour,
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tm->tm_mday, tm->tm_mon + 1, tm->tm_year, tm->tm_wday);
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if (rtc_valid_tm(tm) < 0) {
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dev_err(dev, "invalid date\n");
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rtc_time_to_tm(0, tm);
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}
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return 0;
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}
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static int sh_rtc_set_time(struct device *dev, struct rtc_time *tm)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct sh_rtc *rtc = platform_get_drvdata(pdev);
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unsigned int tmp;
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int year;
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spin_lock_irq(&rtc->lock);
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/* Reset pre-scaler & stop RTC */
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tmp = readb(rtc->regbase + RCR2);
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tmp |= RCR2_RESET;
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tmp &= ~RCR2_START;
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writeb(tmp, rtc->regbase + RCR2);
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writeb(bin2bcd(tm->tm_sec), rtc->regbase + RSECCNT);
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writeb(bin2bcd(tm->tm_min), rtc->regbase + RMINCNT);
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writeb(bin2bcd(tm->tm_hour), rtc->regbase + RHRCNT);
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writeb(bin2bcd(tm->tm_wday), rtc->regbase + RWKCNT);
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writeb(bin2bcd(tm->tm_mday), rtc->regbase + RDAYCNT);
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writeb(bin2bcd(tm->tm_mon + 1), rtc->regbase + RMONCNT);
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if (rtc->capabilities & RTC_CAP_4_DIGIT_YEAR) {
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year = (bin2bcd((tm->tm_year + 1900) / 100) << 8) |
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bin2bcd(tm->tm_year % 100);
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writew(year, rtc->regbase + RYRCNT);
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} else {
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year = tm->tm_year % 100;
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writeb(bin2bcd(year), rtc->regbase + RYRCNT);
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}
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/* Start RTC */
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tmp = readb(rtc->regbase + RCR2);
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tmp &= ~RCR2_RESET;
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tmp |= RCR2_RTCEN | RCR2_START;
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writeb(tmp, rtc->regbase + RCR2);
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spin_unlock_irq(&rtc->lock);
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return 0;
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}
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static inline int sh_rtc_read_alarm_value(struct sh_rtc *rtc, int reg_off)
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{
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unsigned int byte;
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int value = 0xff; /* return 0xff for ignored values */
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byte = readb(rtc->regbase + reg_off);
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if (byte & AR_ENB) {
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byte &= ~AR_ENB; /* strip the enable bit */
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value = bcd2bin(byte);
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}
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return value;
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}
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static int sh_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct sh_rtc *rtc = platform_get_drvdata(pdev);
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struct rtc_time *tm = &wkalrm->time;
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spin_lock_irq(&rtc->lock);
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tm->tm_sec = sh_rtc_read_alarm_value(rtc, RSECAR);
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tm->tm_min = sh_rtc_read_alarm_value(rtc, RMINAR);
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tm->tm_hour = sh_rtc_read_alarm_value(rtc, RHRAR);
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tm->tm_wday = sh_rtc_read_alarm_value(rtc, RWKAR);
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tm->tm_mday = sh_rtc_read_alarm_value(rtc, RDAYAR);
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tm->tm_mon = sh_rtc_read_alarm_value(rtc, RMONAR);
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if (tm->tm_mon > 0)
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tm->tm_mon -= 1; /* RTC is 1-12, tm_mon is 0-11 */
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tm->tm_year = 0xffff;
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wkalrm->enabled = (readb(rtc->regbase + RCR1) & RCR1_AIE) ? 1 : 0;
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spin_unlock_irq(&rtc->lock);
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return 0;
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}
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static inline void sh_rtc_write_alarm_value(struct sh_rtc *rtc,
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int value, int reg_off)
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{
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/* < 0 for a value that is ignored */
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if (value < 0)
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writeb(0, rtc->regbase + reg_off);
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else
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writeb(bin2bcd(value) | AR_ENB, rtc->regbase + reg_off);
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}
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static int sh_rtc_check_alarm(struct rtc_time *tm)
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{
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/*
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* The original rtc says anything > 0xc0 is "don't care" or "match
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* all" - most users use 0xff but rtc-dev uses -1 for the same thing.
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* The original rtc doesn't support years - some things use -1 and
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* some 0xffff. We use -1 to make out tests easier.
|
|
*/
|
|
if (tm->tm_year == 0xffff)
|
|
tm->tm_year = -1;
|
|
if (tm->tm_mon >= 0xff)
|
|
tm->tm_mon = -1;
|
|
if (tm->tm_mday >= 0xff)
|
|
tm->tm_mday = -1;
|
|
if (tm->tm_wday >= 0xff)
|
|
tm->tm_wday = -1;
|
|
if (tm->tm_hour >= 0xff)
|
|
tm->tm_hour = -1;
|
|
if (tm->tm_min >= 0xff)
|
|
tm->tm_min = -1;
|
|
if (tm->tm_sec >= 0xff)
|
|
tm->tm_sec = -1;
|
|
|
|
if (tm->tm_year > 9999 ||
|
|
tm->tm_mon >= 12 ||
|
|
tm->tm_mday == 0 || tm->tm_mday >= 32 ||
|
|
tm->tm_wday >= 7 ||
|
|
tm->tm_hour >= 24 ||
|
|
tm->tm_min >= 60 ||
|
|
tm->tm_sec >= 60)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sh_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct sh_rtc *rtc = platform_get_drvdata(pdev);
|
|
unsigned int rcr1;
|
|
struct rtc_time *tm = &wkalrm->time;
|
|
int mon, err;
|
|
|
|
err = sh_rtc_check_alarm(tm);
|
|
if (unlikely(err < 0))
|
|
return err;
|
|
|
|
spin_lock_irq(&rtc->lock);
|
|
|
|
/* disable alarm interrupt and clear the alarm flag */
|
|
rcr1 = readb(rtc->regbase + RCR1);
|
|
rcr1 &= ~(RCR1_AF | RCR1_AIE);
|
|
writeb(rcr1, rtc->regbase + RCR1);
|
|
|
|
/* set alarm time */
|
|
sh_rtc_write_alarm_value(rtc, tm->tm_sec, RSECAR);
|
|
sh_rtc_write_alarm_value(rtc, tm->tm_min, RMINAR);
|
|
sh_rtc_write_alarm_value(rtc, tm->tm_hour, RHRAR);
|
|
sh_rtc_write_alarm_value(rtc, tm->tm_wday, RWKAR);
|
|
sh_rtc_write_alarm_value(rtc, tm->tm_mday, RDAYAR);
|
|
mon = tm->tm_mon;
|
|
if (mon >= 0)
|
|
mon += 1;
|
|
sh_rtc_write_alarm_value(rtc, mon, RMONAR);
|
|
|
|
if (wkalrm->enabled) {
|
|
rcr1 |= RCR1_AIE;
|
|
writeb(rcr1, rtc->regbase + RCR1);
|
|
}
|
|
|
|
spin_unlock_irq(&rtc->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sh_rtc_irq_set_state(struct device *dev, int enabled)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct sh_rtc *rtc = platform_get_drvdata(pdev);
|
|
|
|
if (enabled) {
|
|
rtc->periodic_freq |= PF_KOU;
|
|
return sh_rtc_ioctl(dev, RTC_PIE_ON, 0);
|
|
} else {
|
|
rtc->periodic_freq &= ~PF_KOU;
|
|
return sh_rtc_ioctl(dev, RTC_PIE_OFF, 0);
|
|
}
|
|
}
|
|
|
|
static int sh_rtc_irq_set_freq(struct device *dev, int freq)
|
|
{
|
|
return sh_rtc_ioctl(dev, RTC_IRQP_SET, freq);
|
|
}
|
|
|
|
static struct rtc_class_ops sh_rtc_ops = {
|
|
.ioctl = sh_rtc_ioctl,
|
|
.read_time = sh_rtc_read_time,
|
|
.set_time = sh_rtc_set_time,
|
|
.read_alarm = sh_rtc_read_alarm,
|
|
.set_alarm = sh_rtc_set_alarm,
|
|
.irq_set_state = sh_rtc_irq_set_state,
|
|
.irq_set_freq = sh_rtc_irq_set_freq,
|
|
.proc = sh_rtc_proc,
|
|
};
|
|
|
|
static int __devinit sh_rtc_probe(struct platform_device *pdev)
|
|
{
|
|
struct sh_rtc *rtc;
|
|
struct resource *res;
|
|
unsigned int tmp;
|
|
int ret;
|
|
|
|
rtc = kzalloc(sizeof(struct sh_rtc), GFP_KERNEL);
|
|
if (unlikely(!rtc))
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&rtc->lock);
|
|
|
|
/* get periodic/carry/alarm irqs */
|
|
ret = platform_get_irq(pdev, 0);
|
|
if (unlikely(ret < 0)) {
|
|
ret = -ENOENT;
|
|
dev_err(&pdev->dev, "No IRQ for period\n");
|
|
goto err_badres;
|
|
}
|
|
rtc->periodic_irq = ret;
|
|
|
|
ret = platform_get_irq(pdev, 1);
|
|
if (unlikely(ret < 0)) {
|
|
ret = -ENOENT;
|
|
dev_err(&pdev->dev, "No IRQ for carry\n");
|
|
goto err_badres;
|
|
}
|
|
rtc->carry_irq = ret;
|
|
|
|
ret = platform_get_irq(pdev, 2);
|
|
if (unlikely(ret < 0)) {
|
|
ret = -ENOENT;
|
|
dev_err(&pdev->dev, "No IRQ for alarm\n");
|
|
goto err_badres;
|
|
}
|
|
rtc->alarm_irq = ret;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
|
if (unlikely(res == NULL)) {
|
|
ret = -ENOENT;
|
|
dev_err(&pdev->dev, "No IO resource\n");
|
|
goto err_badres;
|
|
}
|
|
|
|
rtc->regsize = res->end - res->start + 1;
|
|
|
|
rtc->res = request_mem_region(res->start, rtc->regsize, pdev->name);
|
|
if (unlikely(!rtc->res)) {
|
|
ret = -EBUSY;
|
|
goto err_badres;
|
|
}
|
|
|
|
rtc->regbase = ioremap_nocache(rtc->res->start, rtc->regsize);
|
|
if (unlikely(!rtc->regbase)) {
|
|
ret = -EINVAL;
|
|
goto err_badmap;
|
|
}
|
|
|
|
rtc->rtc_dev = rtc_device_register("sh", &pdev->dev,
|
|
&sh_rtc_ops, THIS_MODULE);
|
|
if (IS_ERR(rtc->rtc_dev)) {
|
|
ret = PTR_ERR(rtc->rtc_dev);
|
|
goto err_unmap;
|
|
}
|
|
|
|
rtc->capabilities = RTC_DEF_CAPABILITIES;
|
|
if (pdev->dev.platform_data) {
|
|
struct sh_rtc_platform_info *pinfo = pdev->dev.platform_data;
|
|
|
|
/*
|
|
* Some CPUs have special capabilities in addition to the
|
|
* default set. Add those in here.
|
|
*/
|
|
rtc->capabilities |= pinfo->capabilities;
|
|
}
|
|
|
|
rtc->rtc_dev->max_user_freq = 256;
|
|
rtc->rtc_dev->irq_freq = 1;
|
|
rtc->periodic_freq = 0x60;
|
|
|
|
platform_set_drvdata(pdev, rtc);
|
|
|
|
/* register periodic/carry/alarm irqs */
|
|
ret = request_irq(rtc->periodic_irq, sh_rtc_periodic, IRQF_DISABLED,
|
|
"sh-rtc period", rtc);
|
|
if (unlikely(ret)) {
|
|
dev_err(&pdev->dev,
|
|
"request period IRQ failed with %d, IRQ %d\n", ret,
|
|
rtc->periodic_irq);
|
|
goto err_unmap;
|
|
}
|
|
|
|
ret = request_irq(rtc->carry_irq, sh_rtc_interrupt, IRQF_DISABLED,
|
|
"sh-rtc carry", rtc);
|
|
if (unlikely(ret)) {
|
|
dev_err(&pdev->dev,
|
|
"request carry IRQ failed with %d, IRQ %d\n", ret,
|
|
rtc->carry_irq);
|
|
free_irq(rtc->periodic_irq, rtc);
|
|
goto err_unmap;
|
|
}
|
|
|
|
ret = request_irq(rtc->alarm_irq, sh_rtc_alarm, IRQF_DISABLED,
|
|
"sh-rtc alarm", rtc);
|
|
if (unlikely(ret)) {
|
|
dev_err(&pdev->dev,
|
|
"request alarm IRQ failed with %d, IRQ %d\n", ret,
|
|
rtc->alarm_irq);
|
|
free_irq(rtc->carry_irq, rtc);
|
|
free_irq(rtc->periodic_irq, rtc);
|
|
goto err_unmap;
|
|
}
|
|
|
|
tmp = readb(rtc->regbase + RCR1);
|
|
tmp &= ~RCR1_CF;
|
|
tmp |= RCR1_CIE;
|
|
writeb(tmp, rtc->regbase + RCR1);
|
|
|
|
return 0;
|
|
|
|
err_unmap:
|
|
iounmap(rtc->regbase);
|
|
err_badmap:
|
|
release_resource(rtc->res);
|
|
err_badres:
|
|
kfree(rtc);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit sh_rtc_remove(struct platform_device *pdev)
|
|
{
|
|
struct sh_rtc *rtc = platform_get_drvdata(pdev);
|
|
|
|
if (likely(rtc->rtc_dev))
|
|
rtc_device_unregister(rtc->rtc_dev);
|
|
|
|
sh_rtc_setpie(&pdev->dev, 0);
|
|
sh_rtc_setaie(&pdev->dev, 0);
|
|
|
|
free_irq(rtc->carry_irq, rtc);
|
|
free_irq(rtc->periodic_irq, rtc);
|
|
free_irq(rtc->alarm_irq, rtc);
|
|
|
|
release_resource(rtc->res);
|
|
|
|
iounmap(rtc->regbase);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
kfree(rtc);
|
|
|
|
return 0;
|
|
}
|
|
static struct platform_driver sh_rtc_platform_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = sh_rtc_probe,
|
|
.remove = __devexit_p(sh_rtc_remove),
|
|
};
|
|
|
|
static int __init sh_rtc_init(void)
|
|
{
|
|
return platform_driver_register(&sh_rtc_platform_driver);
|
|
}
|
|
|
|
static void __exit sh_rtc_exit(void)
|
|
{
|
|
platform_driver_unregister(&sh_rtc_platform_driver);
|
|
}
|
|
|
|
module_init(sh_rtc_init);
|
|
module_exit(sh_rtc_exit);
|
|
|
|
MODULE_DESCRIPTION("SuperH on-chip RTC driver");
|
|
MODULE_VERSION(DRV_VERSION);
|
|
MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, "
|
|
"Jamie Lenehan <lenehan@twibble.org>, "
|
|
"Angelo Castello <angelo.castello@st.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|