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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/mips/vr41xx/common/pmu.c
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/mips/vr41xx/common/pmu.c')
-rw-r--r--arch/mips/vr41xx/common/pmu.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/arch/mips/vr41xx/common/pmu.c b/arch/mips/vr41xx/common/pmu.c
new file mode 100644
index 000000000000..c5f1043de938
--- /dev/null
+++ b/arch/mips/vr41xx/common/pmu.c
@@ -0,0 +1,81 @@
+/*
+ * pmu.c, Power Management Unit routines for NEC VR4100 series.
+ *
+ * Copyright (C) 2003-2004 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/smp.h>
+#include <linux/types.h>
+
+#include <asm/cpu.h>
+#include <asm/io.h>
+#include <asm/reboot.h>
+#include <asm/system.h>
+
+#define PMUCNT2REG KSEG1ADDR(0x0f0000c6)
+ #define SOFTRST 0x0010
+
+static inline void software_reset(void)
+{
+ uint16_t val;
+
+ switch (current_cpu_data.cputype) {
+ case CPU_VR4122:
+ case CPU_VR4131:
+ case CPU_VR4133:
+ val = readw(PMUCNT2REG);
+ val |= SOFTRST;
+ writew(val, PMUCNT2REG);
+ break;
+ default:
+ break;
+ }
+}
+
+static void vr41xx_restart(char *command)
+{
+ local_irq_disable();
+ software_reset();
+ printk(KERN_NOTICE "\nYou can reset your system\n");
+ while (1) ;
+}
+
+static void vr41xx_halt(void)
+{
+ local_irq_disable();
+ printk(KERN_NOTICE "\nYou can turn off the power supply\n");
+ while (1) ;
+}
+
+static void vr41xx_power_off(void)
+{
+ local_irq_disable();
+ printk(KERN_NOTICE "\nYou can turn off the power supply\n");
+ while (1) ;
+}
+
+static int __init vr41xx_pmu_init(void)
+{
+ _machine_restart = vr41xx_restart;
+ _machine_halt = vr41xx_halt;
+ _machine_power_off = vr41xx_power_off;
+
+ return 0;
+}
+
+early_initcall(vr41xx_pmu_init);