linux-mips
[Top] [All Lists]

[PATCH 2.6] vr41xx: add resource management to pmu

To: Ralf Baechle <ralf@linux-mips.org>
Subject: [PATCH 2.6] vr41xx: add resource management to pmu
From: Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
Date: Sun, 22 May 2005 11:14:13 +0900
Cc: yuasa@hh.iij4u.or.jp, linux-mips <linux-mips@linux-mips.org>
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
Hi,

This patch had added resource management to vr41xx's pmu.
Please apply.

Yoichi

Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp>

diff -urN -X dontdiff rc4-orig/arch/mips/vr41xx/common/pmu.c 
rc4/arch/mips/vr41xx/common/pmu.c
--- rc4-orig/arch/mips/vr41xx/common/pmu.c      Sat May  7 14:20:31 2005
+++ rc4/arch/mips/vr41xx/common/pmu.c   Sun May 15 18:14:50 2005
@@ -1,7 +1,7 @@
 /*
  *  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
  *  it under the terms of the GNU General Public License as published by
@@ -17,7 +17,9 @@
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
+#include <linux/errno.h>
 #include <linux/init.h>
+#include <linux/ioport.h>
 #include <linux/kernel.h>
 #include <linux/smp.h>
 #include <linux/types.h>
@@ -27,20 +29,31 @@
 #include <asm/reboot.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
 
+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)
 {
-       uint16_t val;
+       uint16_t pmucnt2;
 
        switch (current_cpu_data.cputype) {
        case CPU_VR4122:
        case CPU_VR4131:
        case CPU_VR4133:
-               val = readw(PMUCNT2REG);
-               val |= SOFTRST;
-               writew(val, PMUCNT2REG);
+               pmucnt2 = pmu_read(PMUCNT2REG);
+               pmucnt2 |= SOFTRST;
+               pmu_write(PMUCNT2REG, pmucnt2);
                break;
        default:
                break;
@@ -71,6 +84,34 @@
 
 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_halt = vr41xx_halt;
        _machine_power_off = vr41xx_power_off;
@@ -78,4 +119,4 @@
        return 0;
 }
 
-early_initcall(vr41xx_pmu_init);
+core_initcall(vr41xx_pmu_init);



<Prev in Thread] Current Thread [Next in Thread>