Commit 3407c0fe authored by Yoichi Yuasa's avatar Yoichi Yuasa Committed by Linus Torvalds

[PATCH] mips: add resource management to pmu

This patch had added resource management to vr41xx's pmu.
Signed-off-by: default avatarYoichi Yuasa <yuasa@hh.iij4u.or.jp>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 4c443d1b
/* /*
* pmu.c, Power Management Unit routines for NEC VR4100 series. * pmu.c, Power Management Unit routines for NEC VR4100 series.
* *
* Copyright (C) 2003-2004 Yoichi Yuasa <yuasa@hh.iij4u.or.jp> * Copyright (C) 2003-2005 Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
* *
* This program is free software; you can redistribute it and/or modify * 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 * it under the terms of the GNU General Public License as published by
...@@ -17,7 +17,9 @@ ...@@ -17,7 +17,9 @@
* along with this program; if not, write to the Free Software * along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/ */
#include <linux/errno.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/ioport.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/smp.h> #include <linux/smp.h>
#include <linux/types.h> #include <linux/types.h>
...@@ -27,20 +29,31 @@ ...@@ -27,20 +29,31 @@
#include <asm/reboot.h> #include <asm/reboot.h>
#include <asm/system.h> #include <asm/system.h>
#define PMUCNT2REG KSEG1ADDR(0x0f0000c6) #define PMU_TYPE1_BASE 0x0b0000a0UL
#define PMU_TYPE1_SIZE 0x0eUL
#define PMU_TYPE2_BASE 0x0f0000c0UL
#define PMU_TYPE2_SIZE 0x10UL
#define PMUCNT2REG 0x06
#define SOFTRST 0x0010 #define SOFTRST 0x0010
static void __iomem *pmu_base;
#define pmu_read(offset) readw(pmu_base + (offset))
#define pmu_write(offset, value) writew((value), pmu_base + (offset))
static inline void software_reset(void) static inline void software_reset(void)
{ {
uint16_t val; uint16_t pmucnt2;
switch (current_cpu_data.cputype) { switch (current_cpu_data.cputype) {
case CPU_VR4122: case CPU_VR4122:
case CPU_VR4131: case CPU_VR4131:
case CPU_VR4133: case CPU_VR4133:
val = readw(PMUCNT2REG); pmucnt2 = pmu_read(PMUCNT2REG);
val |= SOFTRST; pmucnt2 |= SOFTRST;
writew(val, PMUCNT2REG); pmu_write(PMUCNT2REG, pmucnt2);
break; break;
default: default:
break; break;
...@@ -71,6 +84,34 @@ static void vr41xx_power_off(void) ...@@ -71,6 +84,34 @@ static void vr41xx_power_off(void)
static int __init vr41xx_pmu_init(void) static int __init vr41xx_pmu_init(void)
{ {
unsigned long start, size;
switch (current_cpu_data.cputype) {
case CPU_VR4111:
case CPU_VR4121:
start = PMU_TYPE1_BASE;
size = PMU_TYPE1_SIZE;
break;
case CPU_VR4122:
case CPU_VR4131:
case CPU_VR4133:
start = PMU_TYPE2_BASE;
size = PMU_TYPE2_SIZE;
break;
default:
printk("Unexpected CPU of NEC VR4100 series\n");
return -ENODEV;
}
if (request_mem_region(start, size, "PMU") == NULL)
return -EBUSY;
pmu_base = ioremap(start, size);
if (pmu_base == NULL) {
release_mem_region(start, size);
return -EBUSY;
}
_machine_restart = vr41xx_restart; _machine_restart = vr41xx_restart;
_machine_halt = vr41xx_halt; _machine_halt = vr41xx_halt;
_machine_power_off = vr41xx_power_off; _machine_power_off = vr41xx_power_off;
...@@ -78,4 +119,4 @@ static int __init vr41xx_pmu_init(void) ...@@ -78,4 +119,4 @@ static int __init vr41xx_pmu_init(void)
return 0; return 0;
} }
early_initcall(vr41xx_pmu_init); core_initcall(vr41xx_pmu_init);
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