Implement suspend/resume for "mpc10x" compatible fsl host PCI controllers,
use it for linkstation standby. This is version 3, updated to the current
powerpc git tree. Depends as before on TLF_SLEEPING and HID0_SLEEP patches
from Scott Wood.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
---
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 20f45a8..693da18 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -192,7 +192,7 @@ config ARCH_HIBERNATION_POSSIBLE
config ARCH_SUSPEND_POSSIBLE
def_bool y
- depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
+ depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || MPC10X_BRIDGE
config PPC_DCR_NATIVE
bool
diff --git a/arch/powerpc/platforms/embedded6xx/linkstation.c b/arch/powerpc/platforms/embedded6xx/linkstation.c
index eb5d74e..3bab51f 100644
--- a/arch/powerpc/platforms/embedded6xx/linkstation.c
+++ b/arch/powerpc/platforms/embedded6xx/linkstation.c
@@ -197,3 +197,54 @@ define_machine(linkstation){
.halt = linkstation_halt,
.calibrate_decr = generic_calibrate_decr,
};
+
+#ifdef CONFIG_PM_SLEEP
+
+#include <linux/suspend.h>
+#include <linux/serial_reg.h>
+#include <sysdev/fsl_soc.h>
+#include <asm/mpc6xx.h>
+
+static int ls_pm_valid(suspend_state_t state)
+{
+ switch (state) {
+ case PM_SUSPEND_STANDBY:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static int ls_pm_enter(suspend_state_t state)
+{
+ u64 tb;
+
+ /* Get timebase */
+ tb = get_tb();
+
+ /* put CPU to sleep, re-enabling interrupts */
+ mpc6xx_enter_standby();
+
+ local_irq_disable();
+
+ set_tb(tb >> 32, tb & 0xfffffffful);
+
+ return 0;
+}
+
+static struct platform_suspend_ops ls_pm_ops = {
+ .valid = ls_pm_valid,
+ .enter = ls_pm_enter,
+};
+
+static int __init ls_pm_init(void)
+{
+ if (!machine_is(linkstation))
+ return -ENODEV;
+
+ suspend_set_ops(&ls_pm_ops);
+ return 0;
+}
+
+device_initcall(ls_pm_init);
+#endif
diff --git a/arch/powerpc/sysdev/Kconfig b/arch/powerpc/sysdev/Kconfig
index 72fb35b..4df3230 100644
--- a/arch/powerpc/sysdev/Kconfig
+++ b/arch/powerpc/sysdev/Kconfig
@@ -6,3 +6,6 @@ config PPC4xx_PCI_EXPRESS
bool
depends on PCI && 4xx
default n
+
+config MPC10X_PM
+ def_bool FSL_SOC && PCI && PM_SLEEP
diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index 2cc5052..0b90cc8 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -48,3 +48,5 @@ endif
ifeq ($(CONFIG_SUSPEND),y)
obj-$(CONFIG_6xx) += 6xx-suspend.o
endif
+
+obj-$(CONFIG_MPC10X_PM) += mpc10x_pm.o
diff -u /dev/null b/arch/powerpc/sysdev/mpc10x_pm.c
new file mode 100644
index 0000000..6bd773b
--- /dev/null 2008-04-28 10:35:13.531006534 +0200
+++ b/arch/powerpc/sysdev/mpc10x_pm.c 2008-04-25 21:18:19.000000000 +0200
@@ -0,0 +1,73 @@
+/*
+ * Power-management driver for MPC8241 host-PCI controller
+ *
+ * Copyright (C) 2007 G. Liakhovetski (g.liakhovetski@xxxxxx)
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of
+ * any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/pm.h>
+
+#include <asm/pci-bridge.h>
+
+#define MPC10X_LP_REF_EN (1<<12)
+#define MPC10X_PM (1<<7)
+#define MPC10X_DOZE (1<<5)
+#define MPC10X_NAP (1<<4)
+#define MPC10X_SLEEP (1<<3)
+
+static int __devinit mpc10x_pm_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ return 0;
+}
+
+static int mpc10x_pm_suspend_late(struct pci_dev *dev, pm_message_t state)
+{
+ u16 pmcr1;
+
+ pci_read_config_word(dev, 0x70, &pmcr1);
+ pmcr1 &= ~(MPC10X_DOZE | MPC10X_NAP);
+ pmcr1 |= MPC10X_PM | MPC10X_SLEEP | MPC10X_LP_REF_EN;
+ pci_write_config_word(dev, 0x70, pmcr1);
+
+ return 0;
+}
+
+static int mpc10x_pm_resume_early(struct pci_dev *dev)
+{
+ u16 pmcr1;
+
+ pci_read_config_word(dev, 0x70, &pmcr1);
+ pmcr1 &= ~(MPC10X_PM | MPC10X_DOZE | MPC10X_SLEEP | MPC10X_NAP | MPC10X_LP_REF_EN);
+ pci_write_config_word(dev, 0x70, pmcr1);
+
+ return 0;
+}
+
+static struct pci_device_id mpc10x_pm_pci_tbl[] = {
+ { PCI_VENDOR_ID_MOTOROLA, PCI_DEVICE_ID_MOTOROLA_MPC8241,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(pci, mpc10x_pm_pci_tbl);
+
+static struct pci_driver mpc10x_pm_driver = {
+ .name = "mpc10x-pm",
+ .id_table = mpc10x_pm_pci_tbl,
+ .resume_early = mpc10x_pm_resume_early,
+ .suspend_late = mpc10x_pm_suspend_late,
+ .probe = mpc10x_pm_probe,
+};
+
+static int __init mpc10x_pm_init(void)
+{
+ return pci_register_driver(&mpc10x_pm_driver);
+}
+
+device_initcall(mpc10x_pm_init);
diff --git a/include/asm-powerpc/mpc6xx.h b/include/asm-powerpc/mpc6xx.h
index effc229..9bdf8b4 100644
--- a/include/asm-powerpc/mpc6xx.h
+++ b/include/asm-powerpc/mpc6xx.h
@@ -1,6 +1,6 @@
#ifndef __ASM_POWERPC_MPC6xx_H
#define __ASM_POWERPC_MPC6xx_H
-void mpc6xx_enter_standby(void);
+extern void mpc6xx_enter_standby(void);
#endif
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 70eb3c8..9eb84cc 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -800,6 +800,7 @@
#define PCI_DEVICE_ID_MOTOROLA_MPC105 0x0001
#define PCI_DEVICE_ID_MOTOROLA_MPC106 0x0002
#define PCI_DEVICE_ID_MOTOROLA_MPC107 0x0004
+#define PCI_DEVICE_ID_MOTOROLA_MPC8241 0x0006
#define PCI_DEVICE_ID_MOTOROLA_RAVEN 0x4801
#define PCI_DEVICE_ID_MOTOROLA_FALCON 0x4802
#define PCI_DEVICE_ID_MOTOROLA_HAWK 0x4803
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