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[MIPS] Convert to RTC-class ds1742 driver

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The generic rtc-ds1742 driver can be used for RBTX4927 and JMR3927
(with __swizzle_addr trick).  This patch also removes MIPS local
DS1742 stuff.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto 2007-03-01 00:40:21 +09:00 committed by Ralf Baechle
parent 148171b2ac
commit a0574e0480
12 changed files with 86 additions and 339 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
arch/mips/Kconfig
View file

@ -1895,10 +1895,6 @@ config HZ
source "kernel/Kconfig.preempt"
config RTC_DS1742
bool "DS1742 BRAM/RTC support"
depends on TOSHIBA_JMR3927 || TOSHIBA_RBTX4927
config MIPS_INSANE_LARGE
bool "Support for large 64-bit configurations"
depends on CPU_R10000 && 64BIT

24
arch/mips/configs/jmr3927_defconfig
View file

@ -148,7 +148,6 @@ CONFIG_HZ=1000
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set
CONFIG_RTC_DS1742=y
# CONFIG_KEXEC is not set
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
@ -802,7 +801,28 @@ CONFIG_USB_ARCH_HAS_EHCI=y
#
# Real Time Clock
#
# CONFIG_RTC_CLASS is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set
#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
#
# RTC drivers
#
# CONFIG_RTC_DRV_DS1553 is not set
CONFIG_RTC_DRV_DS1742=y
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_TEST is not set
# CONFIG_RTC_DRV_V3020 is not set
#
# DMA Engine support

2
arch/mips/jmr3927/common/Makefile
View file

@ -2,4 +2,4 @@
# Makefile for the common code of TOSHIBA JMR-TX3927 board
#
obj-y += prom.o puts.o rtc_ds1742.o
obj-y += prom.o puts.o

171
arch/mips/jmr3927/common/rtc_ds1742.c
View file

@ -1,171 +0,0 @@
/*
* Copyright 2001 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ahennessy@mvista.com
*
* arch/mips/jmr3927/common/rtc_ds1742.c
* Based on arch/mips/ddb5xxx/common/rtc_ds1386.c
* low-level RTC hookups for s for Dallas 1742 chip.
*
* Copyright (C) 2000-2001 Toshiba Corporation
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* This file exports a function, rtc_ds1386_init(), which expects an
* uncached base address as the argument. It will set the two function
* pointers expected by the MIPS generic timer code.
*/
#include <linux/bcd.h>
#include <linux/types.h>
#include <linux/time.h>
#include <linux/rtc.h>
#include <linux/ds1742rtc.h>
#include <asm/time.h>
#include <asm/addrspace.h>
#include <asm/debug.h>
#define EPOCH 2000
static unsigned long rtc_base;
static unsigned long
rtc_ds1742_get_time(void)
{
unsigned int year, month, day, hour, minute, second;
unsigned int century;
unsigned long flags;
spin_lock_irqsave(&rtc_lock, flags);
rtc_write(RTC_READ, RTC_CONTROL);
second = BCD2BIN(rtc_read(RTC_SECONDS) & RTC_SECONDS_MASK);
minute = BCD2BIN(rtc_read(RTC_MINUTES));
hour = BCD2BIN(rtc_read(RTC_HOURS));
day = BCD2BIN(rtc_read(RTC_DATE));
month = BCD2BIN(rtc_read(RTC_MONTH));
year = BCD2BIN(rtc_read(RTC_YEAR));
century = BCD2BIN(rtc_read(RTC_CENTURY) & RTC_CENTURY_MASK);
rtc_write(0, RTC_CONTROL);
spin_unlock_irqrestore(&rtc_lock, flags);
year += century * 100;
return mktime(year, month, day, hour, minute, second);
}
extern void to_tm(unsigned long tim, struct rtc_time * tm);
static int
rtc_ds1742_set_time(unsigned long t)
{
struct rtc_time tm;
u8 year, month, day, hour, minute, second;
u8 cmos_year, cmos_month, cmos_day, cmos_hour, cmos_minute, cmos_second;
int cmos_century;
unsigned long flags;
spin_lock_irqsave(&rtc_lock, flags);
rtc_write(RTC_READ, RTC_CONTROL);
cmos_second = (u8)(rtc_read(RTC_SECONDS) & RTC_SECONDS_MASK);
cmos_minute = (u8)rtc_read(RTC_MINUTES);
cmos_hour = (u8)rtc_read(RTC_HOURS);
cmos_day = (u8)rtc_read(RTC_DATE);
cmos_month = (u8)rtc_read(RTC_MONTH);
cmos_year = (u8)rtc_read(RTC_YEAR);
cmos_century = rtc_read(RTC_CENTURY) & RTC_CENTURY_MASK;
rtc_write(RTC_WRITE, RTC_CONTROL);
/* convert */
to_tm(t, &tm);
/* check each field one by one */
year = BIN2BCD(tm.tm_year - EPOCH);
if (year != cmos_year) {
rtc_write(year,RTC_YEAR);
}
month = BIN2BCD(tm.tm_mon);
if (month != (cmos_month & 0x1f)) {
rtc_write((month & 0x1f) | (cmos_month & ~0x1f),RTC_MONTH);
}
day = BIN2BCD(tm.tm_mday);
if (day != cmos_day) {
rtc_write(day, RTC_DATE);
}
if (cmos_hour & 0x40) {
/* 12 hour format */
hour = 0x40;
if (tm.tm_hour > 12) {
hour |= 0x20 | (BIN2BCD(hour-12) & 0x1f);
} else {
hour |= BIN2BCD(tm.tm_hour);
}
} else {
/* 24 hour format */
hour = BIN2BCD(tm.tm_hour) & 0x3f;
}
if (hour != cmos_hour) rtc_write(hour, RTC_HOURS);
minute = BIN2BCD(tm.tm_min);
if (minute != cmos_minute) {
rtc_write(minute, RTC_MINUTES);
}
second = BIN2BCD(tm.tm_sec);
if (second != cmos_second) {
rtc_write(second & RTC_SECONDS_MASK,RTC_SECONDS);
}
/* RTC_CENTURY and RTC_CONTROL share same address... */
rtc_write(cmos_century, RTC_CONTROL);
spin_unlock_irqrestore(&rtc_lock, flags);
return 0;
}
void
rtc_ds1742_init(unsigned long base)
{
u8 cmos_second;
/* remember the base */
rtc_base = base;
db_assert((rtc_base & 0xe0000000) == KSEG1);
/* set the function pointers */
rtc_mips_get_time = rtc_ds1742_get_time;
rtc_mips_set_time = rtc_ds1742_set_time;
/* clear oscillator stop bit */
rtc_write(RTC_READ, RTC_CONTROL);
cmos_second = (u8)(rtc_read(RTC_SECONDS) & RTC_SECONDS_MASK);
rtc_write(RTC_WRITE, RTC_CONTROL);
rtc_write(cmos_second, RTC_SECONDS); /* clear msb */
rtc_write(0, RTC_CONTROL);
}

39
arch/mips/jmr3927/rbhma3100/setup.c
View file

@ -45,6 +45,7 @@
#include <linux/param.h> /* for HZ */
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#ifdef CONFIG_SERIAL_TXX9
#include <linux/tty.h>
#include <linux/serial.h>
@ -172,19 +173,10 @@ static cycle_t jmr3927_hpt_read(void)
return jiffies * (JMR3927_TIMER_CLK / HZ) + jmr3927_tmrptr->trr;
}
#define USE_RTC_DS1742
#ifdef USE_RTC_DS1742
extern void rtc_ds1742_init(unsigned long base);
#endif
static void __init jmr3927_time_init(void)
{
clocksource_mips.read = jmr3927_hpt_read;
mips_hpt_frequency = JMR3927_TIMER_CLK;
#ifdef USE_RTC_DS1742
if (jmr3927_have_nvram()) {
rtc_ds1742_init(JMR3927_IOC_NVRAMB_ADDR);
}
#endif
}
void __init plat_timer_setup(struct irqaction *irq)
@ -540,3 +532,32 @@ void __init tx3927_setup(void)
printk("TX3927 D-Cache WriteBack (CWF) .\n");
}
}
/* This trick makes rtc-ds1742 driver usable as is. */
unsigned long __swizzle_addr_b(unsigned long port)
{
if ((port & 0xffff0000) != JMR3927_IOC_NVRAMB_ADDR)
return port;
port = (port & 0xffff0000) | (port & 0x7fff << 1);
#ifdef __BIG_ENDIAN
return port;
#else
return port | 1;
#endif
}
EXPORT_SYMBOL(__swizzle_addr_b);
static int __init jmr3927_rtc_init(void)
{
struct resource res = {
.start = JMR3927_IOC_NVRAMB_ADDR - IO_BASE,
.end = JMR3927_IOC_NVRAMB_ADDR - IO_BASE + 0x800 - 1,
.flags = IORESOURCE_MEM,
};
struct platform_device *dev;
if (!jmr3927_have_nvram())
return -ENODEV;
dev = platform_device_register_simple("ds1742", -1, &res, 1);
return IS_ERR(dev) ? PTR_ERR(dev) : 0;
}
device_initcall(jmr3927_rtc_init);

3
arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_irq.c
View file

@ -132,9 +132,6 @@ JP7 is not bus master -- do NOT use -- only 4 pci bus master's allowed -- SouthB
#include <asm/wbflush.h>
#include <linux/bootmem.h>
#include <linux/blkdev.h>
#ifdef CONFIG_RTC_DS1742
#include <linux/ds1742rtc.h>
#endif
#ifdef CONFIG_TOSHIBA_FPCIB0
#include <asm/tx4927/smsc_fdc37m81x.h>
#endif

76
arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c
View file

@ -53,6 +53,7 @@
#include <linux/pci.h>
#include <linux/timex.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <asm/bootinfo.h>
#include <asm/page.h>
@ -64,9 +65,6 @@
#include <asm/time.h>
#include <linux/bootmem.h>
#include <linux/blkdev.h>
#ifdef CONFIG_RTC_DS1742
#include <linux/ds1742rtc.h>
#endif
#ifdef CONFIG_TOSHIBA_FPCIB0
#include <asm/tx4927/smsc_fdc37m81x.h>
#endif
@ -1020,69 +1018,12 @@ void __init toshiba_rbtx4927_setup(void)
"+\n");
}
#ifdef CONFIG_RTC_DS1742
extern unsigned long rtc_ds1742_get_time(void);
extern int rtc_ds1742_set_time(unsigned long);
extern void rtc_ds1742_wait(void);
#endif
void __init
toshiba_rbtx4927_time_init(void)
{
u32 c1;
u32 c2;
TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_TIME_INIT, "-\n");
#ifdef CONFIG_RTC_DS1742
rtc_mips_get_time = rtc_ds1742_get_time;
rtc_mips_set_time = rtc_ds1742_set_time;
TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_TIME_INIT,
":rtc_ds1742_init()-\n");
rtc_ds1742_init(0xbc010000);
TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_TIME_INIT,
":rtc_ds1742_init()+\n");
TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_TIME_INIT,
":Calibrate mips_hpt_frequency-\n");
rtc_ds1742_wait();
/* get the count */
c1 = read_c0_count();
/* wait for the seconds to change again */
rtc_ds1742_wait();
/* get the count again */
c2 = read_c0_count();
TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_TIME_INIT,
":Calibrate mips_hpt_frequency+\n");
TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_TIME_INIT,
":c1=%12u\n", c1);
TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_TIME_INIT,
":c2=%12u\n", c2);
/* this diff is as close as we are going to get to counter ticks per sec */
mips_hpt_frequency = abs(c2 - c1);
TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_TIME_INIT,
":f1=%12u\n", mips_hpt_frequency);
/* round to 1/10th of a MHz */
mips_hpt_frequency /= (100 * 1000);
mips_hpt_frequency *= (100 * 1000);
TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_TIME_INIT,
":f2=%12u\n", mips_hpt_frequency);
TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_INFO,
":mips_hpt_frequency=%uHz (%uMHz)\n",
mips_hpt_frequency,
mips_hpt_frequency / 1000000);
#else
mips_hpt_frequency = 100000000;
#endif
mips_hpt_frequency = tx4927_cpu_clock / 2;
TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_TIME_INIT, "+\n");
@ -1095,3 +1036,16 @@ void __init toshiba_rbtx4927_timer_setup(struct irqaction *irq)
TOSHIBA_RBTX4927_SETUP_DPRINTK(TOSHIBA_RBTX4927_SETUP_TIMER_SETUP,
"+\n");
}
static int __init toshiba_rbtx4927_rtc_init(void)
{
struct resource res = {
.start = 0x1c010000,
.end = 0x1c010000 + 0x800 - 1,
.flags = IORESOURCE_MEM,
};
struct platform_device *dev =
platform_device_register_simple("ds1742", -1, &res, 1);
return IS_ERR(dev) ? PTR_ERR(dev) : 0;
}
device_initcall(toshiba_rbtx4927_rtc_init);

13
include/asm-mips/ds1742.h
View file

@ -1,13 +0,0 @@
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2006 by Ralf Baechle (ralf@linux-mips.org)
*/
#ifndef _ASM_DS1742_H
#define _ASM_DS1742_H
#include <ds1742.h>
#endif /* _ASM_DS1742_H */

6
include/asm-mips/jmr3927/jmr3927.h
View file

@ -179,12 +179,6 @@ static inline int jmr3927_have_isac(void)
#define jmr3927_have_nvram() \
((jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR) & JMR3927_IDT_MASK) == JMR3927_IOC_IDT)
/* NVRAM macro */
#define jmr3927_nvram_in(ofs) \
jmr3927_ioc_reg_in(JMR3927_IOC_NVRAMB_ADDR + ((ofs) << 1))
#define jmr3927_nvram_out(d, ofs) \
jmr3927_ioc_reg_out(d, JMR3927_IOC_NVRAMB_ADDR + ((ofs) << 1))
/* LED macro */
#define jmr3927_led_set(n/*0-16*/) jmr3927_ioc_reg_out(~(n), JMR3927_IOC_LED_ADDR)
#define jmr3927_io_led_set(n/*0-3*/) jmr3927_isac_reg_out((n), JMR3927_ISAC_LED_ADDR)

16
include/asm-mips/mach-jmr3927/ds1742.h
View file

@ -1,16 +0,0 @@
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2003, 06 by Ralf Baechle
*/
#ifndef __ASM_MACH_JMR3927_DS1742_H
#define __ASM_MACH_JMR3927_DS1742_H
#include <asm/jmr3927/jmr3927.h>
#define rtc_read(reg) (jmr3927_nvram_in(reg))
#define rtc_write(data, reg) (jmr3927_nvram_out((data),(reg)))
#endif /* __ASM_MACH_JMR3927_DS1742_H */

18
include/asm-mips/mach-jmr3927/mangle-port.h Normal file
View file

@ -0,0 +1,18 @@
#ifndef __ASM_MACH_JMR3927_MANGLE_PORT_H
#define __ASM_MACH_JMR3927_MANGLE_PORT_H
extern unsigned long __swizzle_addr_b(unsigned long port);
#define __swizzle_addr_w(port) (port)
#define __swizzle_addr_l(port) (port)
#define __swizzle_addr_q(port) (port)
#define ioswabb(a,x) (x)
#define __mem_ioswabb(a,x) (x)
#define ioswabw(a,x) le16_to_cpu(x)
#define __mem_ioswabw(a,x) (x)
#define ioswabl(a,x) le32_to_cpu(x)
#define __mem_ioswabl(a,x) (x)
#define ioswabq(a,x) le64_to_cpu(x)
#define __mem_ioswabq(a,x) (x)
#endif /* __ASM_MACH_JMR3927_MANGLE_PORT_H */

53
include/linux/ds1742rtc.h
View file

@ -1,53 +0,0 @@
/*
* ds1742rtc.h - register definitions for the Real-Time-Clock / CMOS RAM
*
* Copyright (C) 1999-2001 Toshiba Corporation
* Copyright (C) 2003 Ralf Baechle (ralf@linux-mips.org)
*
* Permission is hereby granted to copy, modify and redistribute this code
* in terms of the GNU Library General Public License, Version 2 or later,
* at your option.
*/
#ifndef __LINUX_DS1742RTC_H
#define __LINUX_DS1742RTC_H
#include <asm/ds1742.h>
#define RTC_BRAM_SIZE 0x800
#define RTC_OFFSET 0x7f8
/*
* Register summary
*/
#define RTC_CONTROL (RTC_OFFSET + 0)
#define RTC_CENTURY (RTC_OFFSET + 0)
#define RTC_SECONDS (RTC_OFFSET + 1)
#define RTC_MINUTES (RTC_OFFSET + 2)
#define RTC_HOURS (RTC_OFFSET + 3)
#define RTC_DAY (RTC_OFFSET + 4)
#define RTC_DATE (RTC_OFFSET + 5)
#define RTC_MONTH (RTC_OFFSET + 6)
#define RTC_YEAR (RTC_OFFSET + 7)
#define RTC_CENTURY_MASK 0x3f
#define RTC_SECONDS_MASK 0x7f
#define RTC_DAY_MASK 0x07
/*
* Bits in the Control/Century register
*/
#define RTC_WRITE 0x80
#define RTC_READ 0x40
/*
* Bits in the Seconds register
*/
#define RTC_STOP 0x80
/*
* Bits in the Day register
*/
#define RTC_BATT_FLAG 0x80
#define RTC_FREQ_TEST 0x40
#endif /* __LINUX_DS1742RTC_H */