[MIPS] separate platform_device registration for VR41xx RTC
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>hifive-unleashed-5.1
Yoichi Yuasa
Ralf Baechle
parent
44173fb2e8
commit
bd0765098b
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@ -2,4 +2,4 @@
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# Makefile for common code of the NEC VR4100 series.
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#
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obj-y += bcu.o cmu.o giu.o icu.o init.o irq.o pmu.o siu.o type.o
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obj-y += bcu.o cmu.o giu.o icu.o init.o irq.o pmu.o rtc.o siu.o type.o
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@ -0,0 +1,117 @@
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/*
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* NEC VR4100 series RTC platform device.
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*
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* Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/platform_device.h>
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#include <asm/cpu.h>
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#include <asm/vr41xx/irq.h>
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static struct resource rtc_type1_resource[] __initdata = {
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{
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.start = 0x0b0000c0,
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.end = 0x0b0000df,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = 0x0b0001c0,
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.end = 0x0b0001df,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = ELAPSEDTIME_IRQ,
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.end = ELAPSEDTIME_IRQ,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = RTCLONG1_IRQ,
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.end = RTCLONG1_IRQ,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct resource rtc_type2_resource[] __initdata = {
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{
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.start = 0x0f000100,
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.end = 0x0f00011f,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = 0x0f000120,
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.end = 0x0f00013f,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = ELAPSEDTIME_IRQ,
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.end = ELAPSEDTIME_IRQ,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = RTCLONG1_IRQ,
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.end = RTCLONG1_IRQ,
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.flags = IORESOURCE_IRQ,
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},
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};
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static int __init vr41xx_rtc_add(void)
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{
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struct platform_device *pdev;
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struct resource *res;
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unsigned int num;
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int retval;
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pdev = platform_device_alloc("RTC", -1);
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if (!pdev)
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return -ENOMEM;
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switch (current_cpu_data.cputype) {
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case CPU_VR4111:
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case CPU_VR4121:
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res = rtc_type1_resource;
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num = ARRAY_SIZE(rtc_type1_resource);
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break;
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case CPU_VR4122:
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case CPU_VR4131:
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case CPU_VR4133:
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res = rtc_type2_resource;
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num = ARRAY_SIZE(rtc_type2_resource);
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break;
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default:
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retval = -ENODEV;
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goto err_free_device;
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}
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retval = platform_device_add_resources(pdev, res, num);
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if (retval)
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goto err_free_device;
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retval = platform_device_add(pdev);
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if (retval)
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goto err_free_device;
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return 0;
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err_free_device:
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platform_device_put(pdev);
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return retval;
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}
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device_initcall(vr41xx_rtc_add);
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@ -17,10 +17,11 @@
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/err.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/rtc.h>
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@ -30,25 +31,11 @@
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#include <asm/div64.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/vr41xx/irq.h>
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MODULE_AUTHOR("Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>");
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MODULE_DESCRIPTION("NEC VR4100 series RTC driver");
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MODULE_LICENSE("GPL");
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#define RTC1_TYPE1_START 0x0b0000c0UL
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#define RTC1_TYPE1_END 0x0b0000dfUL
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#define RTC2_TYPE1_START 0x0b0001c0UL
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#define RTC2_TYPE1_END 0x0b0001dfUL
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#define RTC1_TYPE2_START 0x0f000100UL
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#define RTC1_TYPE2_END 0x0f00011fUL
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#define RTC2_TYPE2_START 0x0f000120UL
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#define RTC2_TYPE2_END 0x0f00013fUL
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#define RTC1_SIZE 0x20
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#define RTC2_SIZE 0x20
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/* RTC 1 registers */
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#define ETIMELREG 0x00
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#define ETIMEMREG 0x02
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@ -98,13 +85,8 @@ static char rtc_name[] = "RTC";
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static unsigned long periodic_frequency;
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static unsigned long periodic_count;
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static unsigned int alarm_enabled;
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struct resource rtc_resource[2] = {
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{ .name = rtc_name,
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.flags = IORESOURCE_MEM, },
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{ .name = rtc_name,
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.flags = IORESOURCE_MEM, },
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};
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static int aie_irq = -1;
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static int pie_irq = -1;
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static inline unsigned long read_elapsed_second(void)
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{
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@ -150,8 +132,8 @@ static void vr41xx_rtc_release(struct device *dev)
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spin_unlock_irq(&rtc_lock);
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disable_irq(ELAPSEDTIME_IRQ);
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disable_irq(RTCLONG1_IRQ);
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disable_irq(aie_irq);
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disable_irq(pie_irq);
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}
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static int vr41xx_rtc_read_time(struct device *dev, struct rtc_time *time)
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@ -209,14 +191,14 @@ static int vr41xx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
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spin_lock_irq(&rtc_lock);
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if (alarm_enabled)
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disable_irq(ELAPSEDTIME_IRQ);
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disable_irq(aie_irq);
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rtc1_write(ECMPLREG, (uint16_t)(alarm_sec << 15));
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rtc1_write(ECMPMREG, (uint16_t)(alarm_sec >> 1));
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rtc1_write(ECMPHREG, (uint16_t)(alarm_sec >> 17));
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if (wkalrm->enabled)
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enable_irq(ELAPSEDTIME_IRQ);
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enable_irq(aie_irq);
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alarm_enabled = wkalrm->enabled;
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@ -234,7 +216,7 @@ static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long
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spin_lock_irq(&rtc_lock);
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if (!alarm_enabled) {
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enable_irq(ELAPSEDTIME_IRQ);
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enable_irq(aie_irq);
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alarm_enabled = 1;
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}
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@ -244,17 +226,17 @@ static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long
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spin_lock_irq(&rtc_lock);
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if (alarm_enabled) {
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disable_irq(ELAPSEDTIME_IRQ);
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disable_irq(aie_irq);
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alarm_enabled = 0;
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}
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spin_unlock_irq(&rtc_lock);
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break;
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case RTC_PIE_ON:
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enable_irq(RTCLONG1_IRQ);
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enable_irq(pie_irq);
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break;
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case RTC_PIE_OFF:
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disable_irq(RTCLONG1_IRQ);
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disable_irq(pie_irq);
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break;
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case RTC_IRQP_READ:
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return put_user(periodic_frequency, (unsigned long __user *)arg);
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@ -331,31 +313,37 @@ static const struct rtc_class_ops vr41xx_rtc_ops = {
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static int __devinit rtc_probe(struct platform_device *pdev)
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{
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struct resource *res;
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struct rtc_device *rtc;
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unsigned int irq;
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int retval;
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if (pdev->num_resources != 2)
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if (pdev->num_resources != 4)
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return -EBUSY;
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rtc1_base = ioremap(pdev->resource[0].start, RTC1_SIZE);
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if (rtc1_base == NULL)
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -EBUSY;
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rtc2_base = ioremap(pdev->resource[1].start, RTC2_SIZE);
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if (rtc2_base == NULL) {
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iounmap(rtc1_base);
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rtc1_base = NULL;
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rtc1_base = ioremap(res->start, res->end - res->start + 1);
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if (!rtc1_base)
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return -EBUSY;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
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if (!res) {
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retval = -EBUSY;
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goto err_rtc1_iounmap;
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}
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rtc2_base = ioremap(res->start, res->end - res->start + 1);
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if (!rtc2_base) {
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retval = -EBUSY;
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goto err_rtc1_iounmap;
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}
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rtc = rtc_device_register(rtc_name, &pdev->dev, &vr41xx_rtc_ops, THIS_MODULE);
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if (IS_ERR(rtc)) {
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iounmap(rtc1_base);
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iounmap(rtc2_base);
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rtc1_base = NULL;
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rtc2_base = NULL;
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return PTR_ERR(rtc);
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retval = PTR_ERR(rtc);
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goto err_iounmap_all;
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}
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spin_lock_irq(&rtc_lock);
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@ -368,35 +356,50 @@ static int __devinit rtc_probe(struct platform_device *pdev)
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spin_unlock_irq(&rtc_lock);
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irq = ELAPSEDTIME_IRQ;
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retval = request_irq(irq, elapsedtime_interrupt, IRQF_DISABLED,
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"elapsed_time", pdev);
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if (retval == 0) {
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irq = RTCLONG1_IRQ;
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retval = request_irq(irq, rtclong1_interrupt, IRQF_DISABLED,
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"rtclong1", pdev);
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aie_irq = platform_get_irq(pdev, 0);
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if (aie_irq < 0 || aie_irq >= NR_IRQS) {
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retval = -EBUSY;
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goto err_device_unregister;
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}
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if (retval < 0) {
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printk(KERN_ERR "rtc: IRQ%d is busy\n", irq);
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rtc_device_unregister(rtc);
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if (irq == RTCLONG1_IRQ)
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free_irq(ELAPSEDTIME_IRQ, NULL);
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iounmap(rtc1_base);
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iounmap(rtc2_base);
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rtc1_base = NULL;
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rtc2_base = NULL;
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return retval;
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}
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retval = request_irq(aie_irq, elapsedtime_interrupt, IRQF_DISABLED,
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"elapsed_time", pdev);
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if (retval < 0)
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goto err_device_unregister;
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pie_irq = platform_get_irq(pdev, 1);
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if (pie_irq < 0 || pie_irq >= NR_IRQS)
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goto err_free_irq;
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retval = request_irq(pie_irq, rtclong1_interrupt, IRQF_DISABLED,
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"rtclong1", pdev);
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if (retval < 0)
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goto err_free_irq;
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platform_set_drvdata(pdev, rtc);
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disable_irq(ELAPSEDTIME_IRQ);
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disable_irq(RTCLONG1_IRQ);
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disable_irq(aie_irq);
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disable_irq(pie_irq);
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printk(KERN_INFO "rtc: Real Time Clock of NEC VR4100 series\n");
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return 0;
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err_free_irq:
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free_irq(aie_irq, pdev);
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err_device_unregister:
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rtc_device_unregister(rtc);
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err_iounmap_all:
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iounmap(rtc2_base);
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rtc2_base = NULL;
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err_rtc1_iounmap:
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iounmap(rtc1_base);
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rtc1_base = NULL;
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return retval;
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}
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static int __devexit rtc_remove(struct platform_device *pdev)
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@ -404,23 +407,21 @@ static int __devexit rtc_remove(struct platform_device *pdev)
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struct rtc_device *rtc;
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rtc = platform_get_drvdata(pdev);
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if (rtc != NULL)
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if (rtc)
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rtc_device_unregister(rtc);
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platform_set_drvdata(pdev, NULL);
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free_irq(ELAPSEDTIME_IRQ, NULL);
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free_irq(RTCLONG1_IRQ, NULL);
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if (rtc1_base != NULL)
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free_irq(aie_irq, pdev);
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free_irq(pie_irq, pdev);
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if (rtc1_base)
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iounmap(rtc1_base);
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if (rtc2_base != NULL)
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if (rtc2_base)
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iounmap(rtc2_base);
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return 0;
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}
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static struct platform_device *rtc_platform_device;
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static struct platform_driver rtc_platform_driver = {
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.probe = rtc_probe,
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.remove = __devexit_p(rtc_remove),
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@ -432,55 +433,12 @@ static struct platform_driver rtc_platform_driver = {
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static int __init vr41xx_rtc_init(void)
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{
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int retval;
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switch (current_cpu_data.cputype) {
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case CPU_VR4111:
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case CPU_VR4121:
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rtc_resource[0].start = RTC1_TYPE1_START;
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rtc_resource[0].end = RTC1_TYPE1_END;
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rtc_resource[1].start = RTC2_TYPE1_START;
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rtc_resource[1].end = RTC2_TYPE1_END;
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break;
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case CPU_VR4122:
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case CPU_VR4131:
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case CPU_VR4133:
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rtc_resource[0].start = RTC1_TYPE2_START;
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rtc_resource[0].end = RTC1_TYPE2_END;
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rtc_resource[1].start = RTC2_TYPE2_START;
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rtc_resource[1].end = RTC2_TYPE2_END;
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break;
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default:
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return -ENODEV;
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break;
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}
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rtc_platform_device = platform_device_alloc("RTC", -1);
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if (rtc_platform_device == NULL)
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return -ENOMEM;
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retval = platform_device_add_resources(rtc_platform_device,
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rtc_resource, ARRAY_SIZE(rtc_resource));
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if (retval == 0)
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retval = platform_device_add(rtc_platform_device);
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if (retval < 0) {
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platform_device_put(rtc_platform_device);
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return retval;
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}
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retval = platform_driver_register(&rtc_platform_driver);
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if (retval < 0)
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platform_device_unregister(rtc_platform_device);
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return retval;
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return platform_driver_register(&rtc_platform_driver);
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}
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static void __exit vr41xx_rtc_exit(void)
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{
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platform_driver_unregister(&rtc_platform_driver);
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platform_device_unregister(rtc_platform_device);
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}
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module_init(vr41xx_rtc_init);
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