[PATCH] mips: add resource management to pmu
This patch had added resource management to vr41xx's pmu. Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -1,7 +1,7 @@
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/*
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* pmu.c, Power Management Unit routines for NEC VR4100 series.
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*
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* Copyright (C) 2003-2004 Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
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* Copyright (C) 2003-2005 Yoichi Yuasa <yuasa@hh.iij4u.or.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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@ -17,7 +17,9 @@
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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/errno.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/smp.h>
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#include <linux/types.h>
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@ -27,20 +29,31 @@
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#include <asm/reboot.h>
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#include <asm/system.h>
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#define PMUCNT2REG KSEG1ADDR(0x0f0000c6)
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#define PMU_TYPE1_BASE 0x0b0000a0UL
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#define PMU_TYPE1_SIZE 0x0eUL
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#define PMU_TYPE2_BASE 0x0f0000c0UL
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#define PMU_TYPE2_SIZE 0x10UL
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#define PMUCNT2REG 0x06
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#define SOFTRST 0x0010
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static void __iomem *pmu_base;
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#define pmu_read(offset) readw(pmu_base + (offset))
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#define pmu_write(offset, value) writew((value), pmu_base + (offset))
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static inline void software_reset(void)
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{
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uint16_t val;
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uint16_t pmucnt2;
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switch (current_cpu_data.cputype) {
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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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val = readw(PMUCNT2REG);
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val |= SOFTRST;
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writew(val, PMUCNT2REG);
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pmucnt2 = pmu_read(PMUCNT2REG);
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pmucnt2 |= SOFTRST;
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pmu_write(PMUCNT2REG, pmucnt2);
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break;
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default:
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break;
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@ -71,6 +84,34 @@ static void vr41xx_power_off(void)
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static int __init vr41xx_pmu_init(void)
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{
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unsigned long start, size;
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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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start = PMU_TYPE1_BASE;
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size = PMU_TYPE1_SIZE;
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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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start = PMU_TYPE2_BASE;
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size = PMU_TYPE2_SIZE;
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break;
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default:
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printk("Unexpected CPU of NEC VR4100 series\n");
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return -ENODEV;
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}
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if (request_mem_region(start, size, "PMU") == NULL)
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return -EBUSY;
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pmu_base = ioremap(start, size);
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if (pmu_base == NULL) {
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release_mem_region(start, size);
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return -EBUSY;
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}
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_machine_restart = vr41xx_restart;
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_machine_halt = vr41xx_halt;
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_machine_power_off = vr41xx_power_off;
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@ -78,4 +119,4 @@ static int __init vr41xx_pmu_init(void)
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return 0;
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}
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early_initcall(vr41xx_pmu_init);
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core_initcall(vr41xx_pmu_init);
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