From: Scott Wood <scottwood@freescale.com>
To: paulus@samba.org
Cc: linuxppc-dev@ozlabs.org
Subject: [PATCH 3/8] Add 6xx-style HID0_SLEEP support.
Date: Wed, 12 Dec 2007 11:36:00 -0600 [thread overview]
Message-ID: <20071212173600.GB5596@loki.buserror.net> (raw)
In-Reply-To: <20071212173519.GA5577@loki.buserror.net>
Signed-off-by: Scott Wood <scottwood@freescale.com>
---
arch/powerpc/sysdev/6xx-suspend.S | 52 +++++++++++++++++++++++++++++++++++++
arch/powerpc/sysdev/Makefile | 4 +++
include/asm-powerpc/mpc6xx.h | 6 ++++
3 files changed, 62 insertions(+), 0 deletions(-)
create mode 100644 arch/powerpc/sysdev/6xx-suspend.S
create mode 100644 include/asm-powerpc/mpc6xx.h
diff --git a/arch/powerpc/sysdev/6xx-suspend.S b/arch/powerpc/sysdev/6xx-suspend.S
new file mode 100644
index 0000000..21cda08
--- /dev/null
+++ b/arch/powerpc/sysdev/6xx-suspend.S
@@ -0,0 +1,52 @@
+/*
+ * Enter and leave sleep state on chips with 6xx-style HID0
+ * power management bits, which don't leave sleep state via reset.
+ *
+ * Author: Scott Wood <scottwood@freescale.com>
+ *
+ * Copyright (c) 2006-2007 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <asm/ppc_asm.h>
+#include <asm/reg.h>
+#include <asm/thread_info.h>
+#include <asm/asm-offsets.h>
+
+_GLOBAL(mpc6xx_enter_standby)
+ mflr r4
+
+ mfspr r5, SPRN_HID0
+ rlwinm r5, r5, 0, ~(HID0_DOZE | HID0_NAP)
+ oris r5, r5, HID0_SLEEP@h
+ mtspr SPRN_HID0, r5
+ isync
+
+ lis r5, ret_from_standby@h
+ ori r5, r5, ret_from_standby@l
+ mtlr r5
+
+ rlwinm r5, r1, 0, 0, 31-THREAD_SHIFT
+ lwz r6, TI_LOCAL_FLAGS(r5)
+ ori r6, r6, _TLF_SLEEPING
+ stw r6, TI_LOCAL_FLAGS(r5)
+
+ mfmsr r5
+ ori r5, r5, MSR_EE
+ oris r5, r5, MSR_POW@h
+ sync
+ mtmsr r5
+ isync
+
+1: b 1b
+
+ret_from_standby:
+ mfspr r5, SPRN_HID0
+ rlwinm r5, r5, 0, ~HID0_SLEEP
+ mtspr SPRN_HID0, r5
+
+ mtlr r4
+ blr
diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index 99a77d7..df2b885 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -37,3 +37,7 @@ obj-$(CONFIG_PPC_DCR) += dcr.o
obj-$(CONFIG_8xx) += mpc8xx_pic.o commproc.o
obj-$(CONFIG_UCODE_PATCH) += micropatch.o
endif
+
+ifeq ($(CONFIG_SUSPEND),y)
+obj-$(CONFIG_6xx) += 6xx-suspend.o
+endif
diff --git a/include/asm-powerpc/mpc6xx.h b/include/asm-powerpc/mpc6xx.h
new file mode 100644
index 0000000..effc229
--- /dev/null
+++ b/include/asm-powerpc/mpc6xx.h
@@ -0,0 +1,6 @@
+#ifndef __ASM_POWERPC_MPC6xx_H
+#define __ASM_POWERPC_MPC6xx_H
+
+void mpc6xx_enter_standby(void);
+
+#endif
--
1.5.3.7
next prev parent reply other threads:[~2007-12-12 17:36 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-12 17:35 [PATCH 1/8] Implement arch disable/enable irq hooks Scott Wood
2007-12-12 17:35 ` [PATCH 2/8] pm: Add TLF_SLEEPING hack to delay interrupt delivery when waking from sleep Scott Wood
2007-12-12 17:36 ` Scott Wood [this message]
2007-12-12 17:36 ` [PATCH 4/8] fsl_soc: Factor fsl_get_sys_freq() out of the wdt init Scott Wood
2007-12-12 23:01 ` Stephen Rothwell
2007-12-12 17:36 ` [PATCH 5/8] mpc83xx: Power Management support Scott Wood
2007-12-12 17:36 ` [PATCH 6/8] mpc83xx: timer driver for PM wakeup Scott Wood
2007-12-13 0:14 ` Stephen Rothwell
2007-12-12 17:36 ` [PATCH 7/8] gianfar: Add flags for magic packet and MDIO Scott Wood
2007-12-12 17:36 ` [PATCH 8/8] gianfar: Magic Packet and suspend/resume support Scott Wood
2007-12-14 20:24 ` Jeff Garzik
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