Basic PM support for 83xx. Standby is implemented as sleep.
Suspend-to-RAM is implemented as "deep sleep" (with the processor
turned off) on 831x.
Signed-off-by: Scott Wood <[EMAIL PROTECTED]>
---
arch/powerpc/platforms/83xx/Kconfig | 5 +
arch/powerpc/platforms/83xx/Makefile | 1 +
arch/powerpc/platforms/83xx/suspend-asm.S | 531 +++++++++++++++++++++++++++++
arch/powerpc/platforms/83xx/suspend.c | 423 +++++++++++++++++++++++
arch/powerpc/sysdev/fsl_soc.c | 33 ++
arch/powerpc/sysdev/fsl_soc.h | 10 +
arch/powerpc/sysdev/ipic.c | 71 ++++
include/asm-powerpc/reg.h | 4 +
include/linux/fsl_devices.h | 24 ++
9 files changed, 1102 insertions(+), 0 deletions(-)
create mode 100644 arch/powerpc/platforms/83xx/suspend-asm.S
create mode 100644 arch/powerpc/platforms/83xx/suspend.c
diff --git a/arch/powerpc/platforms/83xx/Kconfig
b/arch/powerpc/platforms/83xx/Kconfig
index ec305f1..901dbaf 100644
--- a/arch/powerpc/platforms/83xx/Kconfig
+++ b/arch/powerpc/platforms/83xx/Kconfig
@@ -75,3 +75,8 @@ config PPC_MPC836x
select PPC_UDBG_16550
select PPC_INDIRECT_PCI
default y if MPC836x_MDS
+
+config PPC_83xx_SUSPEND
+ bool
+ default y
+ depends on PPC_83xx && SUSPEND
diff --git a/arch/powerpc/platforms/83xx/Makefile
b/arch/powerpc/platforms/83xx/Makefile
index 5a98f88..944369e 100644
--- a/arch/powerpc/platforms/83xx/Makefile
+++ b/arch/powerpc/platforms/83xx/Makefile
@@ -3,6 +3,7 @@
#
obj-y := misc.o usb.o
obj-$(CONFIG_PCI) += pci.o
+obj-$(CONFIG_SUSPEND) += suspend.o suspend-asm.o
obj-$(CONFIG_MPC8313_RDB) += mpc8313_rdb.o
obj-$(CONFIG_MPC832x_RDB) += mpc832x_rdb.o
obj-$(CONFIG_MPC834x_MDS) += mpc834x_mds.o
diff --git a/arch/powerpc/platforms/83xx/suspend-asm.S
b/arch/powerpc/platforms/83xx/suspend-asm.S
new file mode 100644
index 0000000..bfff3bd
--- /dev/null
+++ b/arch/powerpc/platforms/83xx/suspend-asm.S
@@ -0,0 +1,531 @@
+/*
+ * Enter and leave sleep state on MPC83xx
+ *
+ * Author: Scott Wood <[EMAIL PROTECTED]>
+ *
+ * Copyright (c) 2006 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/page.h>
+#include <asm/ppc_asm.h>
+#include <asm/reg.h>
+#include <asm/asm-offsets.h>
+
+#define SS_MEMSAVE 0x00
+#define SS_HID 0x08 /* 3 HIDs */
+#define SS_IABR 0x14 /* 2 IABRs */
+#define SS_IBCR 0x1c
+#define SS_DABR 0x20 /* 2 DABRs */
+#define SS_DBCR 0x28
+#define SS_SP 0x2c
+#define SS_SR 0x30 /* 16 segment registers */
+#define SS_CURRENT 0x70
+#define SS_MSR 0x74
+#define SS_SDR1 0x78
+#define SS_LR 0x7c
+#define SS_SPRG 0x80 /* 4 SPRGs */
+#define SS_DBAT 0x90 /* 8 DBATs */
+#define SS_IBAT 0xd0 /* 8 IBATs */
+#define SS_TB 0x110
+#define SS_CR 0x118
+#define SS_GPREG 0x11c /* r12-r31 */
+#define STATE_SAVE_SIZE 0x16c
+
+ .section .data
+ .align 5
+
+mpc83xx_sleep_save_area:
+ .space STATE_SAVE_SIZE
+immrbase:
+ .long 0
+
+ .section .text
+ .align 5
+
+ /* r3 = physical address of IMMR */
+_GLOBAL(mpc83xx_enter_deep_sleep)
+ /* Re-use the state saving/restoring code in
+ * arch/powerpc/kernel/swsusp_32.S, but have
+ * it call us instead of swsusp_save.
+ */
+
+ lis r4, [EMAIL PROTECTED]
+ stw r3, [EMAIL PROTECTED](r4)
+
+ /* The first 2 words of memory are used to communicate with the
+ * bootloader, to tell it how to resume.
+ *
+ * The first word is the magic number 0xf5153ae5, and the second
+ * is the pointer to mpc83xx_deep_resume.
+ *
+ * The original content of these two words is saved in the state
+ * save area.
+ */
+
+ lis r3, [EMAIL PROTECTED]
+ ori r3, r3, [EMAIL PROTECTED]
+
+ lis r4, [EMAIL PROTECTED]
+ lwz r5, 0(r4)
+ lwz r6, 4(r4)
+
+ stw r5, SS_MEMSAVE+0(r3)
+ stw r6, SS_MEMSAVE+4(r3)
+
+ mfspr r5, SPRN_HID0
+ mfspr r6, SPRN_HID1
+ mfspr r7, SPRN_HID2
+
+ stw r5, SS_HID+0(r3)
+ stw r6, SS_HID+4(r3)
+ stw r7, SS_HID+8(r3)
+
+ mfspr r4, SPRN_IABR
+ mfspr r5, SPRN_IABR2
+ mfspr r6, SPRN_IBCR
+ mfspr r7, SPRN_DABR
+ mfspr r8, SPRN_DABR2
+ mfspr r9, SPRN_DBCR
+
+ stw r4, SS_IABR+0(r3)
+ stw r5, SS_IABR+4(r3)
+ stw r6, SS_IBCR(r3)
+ stw r7, SS_DABR+0(r3)
+ stw r8, SS_DABR+4(r3)
+ stw r9, SS_DBCR(r3)
+
+ mfspr r4, SPRN_SPRG0
+ mfspr r5, SPRN_SPRG1
+ mfspr r6, SPRN_SPRG2
+ mfspr r7, SPRN_SPRG3
+ mfsdr1 r8
+
+ stw r4, SS_SPRG+0(r3)
+ stw r5, SS_SPRG+4(r3)
+ stw r6, SS_SPRG+8(r3)
+ stw r7, SS_SPRG+12(r3)
+ stw r8, SS_SDR1(r3)
+
+ mfspr r4, SPRN_DBAT0U
+ mfspr r5, SPRN_DBAT0L
+ mfspr r6, SPRN_DBAT1U
+ mfspr r7, SPRN_DBAT1L
+
+ stw r4, SS_DBAT+0x00(r3)
+ stw r5, SS_DBAT+0x04(r3)
+ stw r6, SS_DBAT+0x08(r3)
+ stw r7, SS_DBAT+0x0c(r3)
+
+ mfspr r4, SPRN_DBAT2U
+ mfspr r5, SPRN_DBAT2L
+ mfspr r6, SPRN_DBAT3U
+ mfspr r7, SPRN_DBAT3L
+
+ stw r4, SS_DBAT+0x10(r3)
+ stw r5, SS_DBAT+0x14(r3)
+ stw r6, SS_DBAT+0x18(r3)
+ stw r7, SS_DBAT+0x1c(r3)
+
+ mfspr r4, SPRN_DBAT4U
+ mfspr r5, SPRN_DBAT4L
+ mfspr r6, SPRN_DBAT5U
+ mfspr r7, SPRN_DBAT5L
+
+ stw r4, SS_DBAT+0x20(r3)
+ stw r5, SS_DBAT+0x24(r3)
+ stw r6, SS_DBAT+0x28(r3)
+ stw r7, SS_DBAT+0x2c(r3)
+
+ mfspr r4, SPRN_DBAT6U
+ mfspr r5, SPRN_DBAT6L
+ mfspr r6, SPRN_DBAT7U
+ mfspr r7, SPRN_DBAT7L
+
+ stw r4, SS_DBAT+0x30(r3)
+ stw r5, SS_DBAT+0x34(r3)
+ stw r6, SS_DBAT+0x38(r3)
+ stw r7, SS_DBAT+0x3c(r3)
+
+ mfspr r4, SPRN_IBAT0U
+ mfspr r5, SPRN_IBAT0L
+ mfspr r6, SPRN_IBAT1U
+ mfspr r7, SPRN_IBAT1L
+
+ stw r4, SS_IBAT+0x00(r3)
+ stw r5, SS_IBAT+0x04(r3)
+ stw r6, SS_IBAT+0x08(r3)
+ stw r7, SS_IBAT+0x0c(r3)
+
+ mfspr r4, SPRN_IBAT2U
+ mfspr r5, SPRN_IBAT2L
+ mfspr r6, SPRN_IBAT3U
+ mfspr r7, SPRN_IBAT3L
+
+ stw r4, SS_IBAT+0x10(r3)
+ stw r5, SS_IBAT+0x14(r3)
+ stw r6, SS_IBAT+0x18(r3)
+ stw r7, SS_IBAT+0x1c(r3)
+
+ mfspr r4, SPRN_IBAT4U
+ mfspr r5, SPRN_IBAT4L
+ mfspr r6, SPRN_IBAT5U
+ mfspr r7, SPRN_IBAT5L
+
+ stw r4, SS_IBAT+0x20(r3)
+ stw r5, SS_IBAT+0x24(r3)
+ stw r6, SS_IBAT+0x28(r3)
+ stw r7, SS_IBAT+0x2c(r3)
+
+ mfspr r4, SPRN_IBAT6U
+ mfspr r5, SPRN_IBAT6L
+ mfspr r6, SPRN_IBAT7U
+ mfspr r7, SPRN_IBAT7L
+
+ stw r4, SS_IBAT+0x30(r3)
+ stw r5, SS_IBAT+0x34(r3)
+ stw r6, SS_IBAT+0x38(r3)
+ stw r7, SS_IBAT+0x3c(r3)
+
+ mfmsr r4
+ mflr r5
+ mfcr r6
+
+ stw r4, SS_MSR(r3)
+ stw r5, SS_LR(r3)
+ stw r6, SS_CR(r3)
+ stw r1, SS_SP(r3)
+ stw r2, SS_CURRENT(r3)
+
+1: mftbu r4
+ mftb r5
+ mftbu r6
+ cmpw r4, r6
+ bne 1b
+
+ stw r4, SS_TB+0(r3)
+ stw r5, SS_TB+4(r3)
+
+ stmw r12, SS_GPREG(r3)
+
+ li r4, 0
+ addi r6, r3, SS_SR-4
+1: mfsrin r5, r4
+ stwu r5, 4(r6)
+ addis r4, r4, 0x1000
+ cmpwi r4, 0
+ bne 1b
+
+ /* Disable machine checks and critical exceptions */
+ mfmsr r4
+ rlwinm r4, r4, 0, ~MSR_CE
+ rlwinm r4, r4, 0, ~MSR_ME
+ mtmsr r4
+ isync
+
+#define TMP_VIRT_IMMR 0xf0000000
+#define DEFAULT_IMMR_VALUE 0xff400000
+#define IMMRBAR_BASE 0x0000
+
+ lis r4, [EMAIL PROTECTED]
+ lwz r4, [EMAIL PROTECTED](r4)
+
+ /* Use DBAT0 to address the current IMMR space */
+
+ ori r4, r4, 0x002a
+ mtspr SPRN_DBAT0L, r4
+ lis r8, [EMAIL PROTECTED]
+ ori r4, r8, 0x001e /* 1 MByte accessable from Kernel Space only */
+ mtspr SPRN_DBAT0U, r4
+ isync
+
+ /* Use DBAT1 to address the original IMMR space */
+
+ lis r4, [EMAIL PROTECTED]
+ ori r4, r4, 0x002a
+ mtspr SPRN_DBAT1L, r4
+ lis r9, (TMP_VIRT_IMMR + 0x01000000)@h
+ ori r4, r9, 0x001e /* 1 MByte accessable from Kernel Space only */
+ mtspr SPRN_DBAT1U, r4
+ isync
+
+ /* Use DBAT2 to address the beginning of RAM. This isn't done
+ * using the normal virtual mapping, because with page debugging
+ * enabled it will be read-only. */
+
+ li r4, 0x0002
+ mtspr SPRN_DBAT2L, r4
+ lis r4, [EMAIL PROTECTED]
+ ori r4, r4, 0x001e /* 1 MByte accessable from Kernel Space only */
+ mtspr SPRN_DBAT2U, r4
+ isync
+
+ /* Flush the cache with our BAT, as there will be TLB misses
+ * otherwise if page debugging is enabled, and these misses
+ * will disturb the PLRU algorithm.
+ */
+
+ bl __flush_disable_L1
+
+ lis r6, 0xf515
+ ori r6, r6, 0x3ae5
+
+ lis r7, [EMAIL PROTECTED]
+ ori r7, r7, [EMAIL PROTECTED]
+ tophys(r7, r7)
+
+ lis r5, [EMAIL PROTECTED]
+ stw r6, 0(r5)
+ stw r7, 4(r5)
+
+ /* Reset BARs */
+
+ li r4, 0
+ stw r4, 0x0024(r8)
+ stw r4, 0x002c(r8)
+ stw r4, 0x0034(r8)
+ stw r4, 0x003c(r8)
+ stw r4, 0x0064(r8)
+ stw r4, 0x006c(r8)
+
+ /* Rev 1 of the 8313 has problems with wakeup events that are
+ * pending during the transition to deep sleep state (such as if
+ * the PCI host sets the state to D3 and then D0 in rapid
+ * succession). This check shrinks the race window somewhat.
+ *
+ * See erratum PCI23, though the problem is not limited
+ * to PCI.
+ */
+
+ lwz r3, 0x0b04(r8)
+ andi. r3, r3, 1
+ bne- mpc83xx_deep_resume
+
+ /* Move IMMR back to the default location, following the
+ * procedure specified in the MPC8313 manual.
+ */
+ lwz r4, IMMRBAR_BASE(r8)
+ isync
+ lis r4, [EMAIL PROTECTED]
+ stw r4, IMMRBAR_BASE(r8)
+ lis r4, [EMAIL PROTECTED]
+ lwz r4, 0(r4)
+ isync
+ lwz r4, IMMRBAR_BASE(r9)
+ mr r8, r9
+ isync
+
+ /* Check the Reset Configuration Word to see whether flash needs
+ * to be mapped at a low address or a high address.
+ */
+
+ lwz r4, 0x0904(r8)
+ andis. r4, r4, 0x0400
+ li r4, 0
+ beq boot_low
+ lis r4, 0xff80
+boot_low:
+ stw r4, 0x0020(r8)
+ lis r7, 0x8000
+ ori r7, r7, 0x0016
+
+ mfspr r5, SPRN_HID0
+ rlwinm r5, r5, 0, ~(HID0_DOZE | HID0_NAP)
+ oris r5, r5, [EMAIL PROTECTED]
+ mtspr SPRN_HID0, r5
+ isync
+
+ mfmsr r5
+ oris r5, r5, [EMAIL PROTECTED]
+
+ /* Enable the flash mapping at the appropriate address. This
+ * mapping will override the RAM mapping, so there's no need to
+ * disable the latter. This must be done inside the same cache
+ * line as setting MSR_POW, so that no instruction fetches from
+ * RAM happen after the flash mapping is turned on.
+ */
+
+ .align 5
+ stw r7, 0x0024(r8)
+ sync
+ isync
+ mtmsr r5
+ isync
+1: b 1b
+
+mpc83xx_deep_resume:
+ lis r4, [EMAIL PROTECTED]
+ ori r4, r4, [EMAIL PROTECTED]
+ tophys(r4, r4)
+ mtsrr0 r4
+
+ mfmsr r4
+ rlwinm r4, r4, 0, ~(MSR_IR | MSR_DR)
+ mtsrr1 r4
+
+ rfi
+
+1: tlbia
+ bl __inval_enable_L1
+
+ lis r3, [EMAIL PROTECTED]
+ ori r3, r3, [EMAIL PROTECTED]
+ tophys(r3, r3)
+
+ lwz r5, SS_MEMSAVE+0(r3)
+ lwz r6, SS_MEMSAVE+4(r3)
+
+ stw r5, 0(0)
+ stw r6, 4(0)
+
+ lwz r5, SS_HID+0(r3)
+ lwz r6, SS_HID+4(r3)
+ lwz r7, SS_HID+8(r3)
+
+ mtspr SPRN_HID0, r5
+ mtspr SPRN_HID1, r6
+ mtspr SPRN_HID2, r7
+
+ lwz r4, SS_IABR+0(r3)
+ lwz r5, SS_IABR+4(r3)
+ lwz r6, SS_IBCR(r3)
+ lwz r7, SS_DABR+0(r3)
+ lwz r8, SS_DABR+4(r3)
+ lwz r9, SS_DBCR(r3)
+
+ mtspr SPRN_IABR, r4
+ mtspr SPRN_IABR2, r5
+ mtspr SPRN_IBCR, r6
+ mtspr SPRN_DABR, r7
+ mtspr SPRN_DABR2, r8
+ mtspr SPRN_DBCR, r9
+
+ li r4, 0
+ addi r6, r3, SS_SR-4
+1: lwzu r5, 4(r6)
+ mtsrin r5, r4
+ addis r4, r4, 0x1000
+ cmpwi r4, 0
+ bne 1b
+
+ lwz r4, SS_DBAT+0x00(r3)
+ lwz r5, SS_DBAT+0x04(r3)
+ lwz r6, SS_DBAT+0x08(r3)
+ lwz r7, SS_DBAT+0x0c(r3)
+
+ mtspr SPRN_DBAT0U, r4
+ mtspr SPRN_DBAT0L, r5
+ mtspr SPRN_DBAT1U, r6
+ mtspr SPRN_DBAT1L, r7
+
+ lwz r4, SS_DBAT+0x10(r3)
+ lwz r5, SS_DBAT+0x14(r3)
+ lwz r6, SS_DBAT+0x18(r3)
+ lwz r7, SS_DBAT+0x1c(r3)
+
+ mtspr SPRN_DBAT2U, r4
+ mtspr SPRN_DBAT2L, r5
+ mtspr SPRN_DBAT3U, r6
+ mtspr SPRN_DBAT3L, r7
+
+ lwz r4, SS_DBAT+0x20(r3)
+ lwz r5, SS_DBAT+0x24(r3)
+ lwz r6, SS_DBAT+0x28(r3)
+ lwz r7, SS_DBAT+0x2c(r3)
+
+ mtspr SPRN_DBAT4U, r4
+ mtspr SPRN_DBAT4L, r5
+ mtspr SPRN_DBAT5U, r6
+ mtspr SPRN_DBAT5L, r7
+
+ lwz r4, SS_DBAT+0x30(r3)
+ lwz r5, SS_DBAT+0x34(r3)
+ lwz r6, SS_DBAT+0x38(r3)
+ lwz r7, SS_DBAT+0x3c(r3)
+
+ mtspr SPRN_DBAT6U, r4
+ mtspr SPRN_DBAT6L, r5
+ mtspr SPRN_DBAT7U, r6
+ mtspr SPRN_DBAT7L, r7
+
+ lwz r4, SS_IBAT+0x00(r3)
+ lwz r5, SS_IBAT+0x04(r3)
+ lwz r6, SS_IBAT+0x08(r3)
+ lwz r7, SS_IBAT+0x0c(r3)
+
+ mtspr SPRN_IBAT0U, r4
+ mtspr SPRN_IBAT0L, r5
+ mtspr SPRN_IBAT1U, r6
+ mtspr SPRN_IBAT1L, r7
+
+ lwz r4, SS_IBAT+0x10(r3)
+ lwz r5, SS_IBAT+0x14(r3)
+ lwz r6, SS_IBAT+0x18(r3)
+ lwz r7, SS_IBAT+0x1c(r3)
+
+ mtspr SPRN_IBAT2U, r4
+ mtspr SPRN_IBAT2L, r5
+ mtspr SPRN_IBAT3U, r6
+ mtspr SPRN_IBAT3L, r7
+
+ lwz r4, SS_IBAT+0x20(r3)
+ lwz r5, SS_IBAT+0x24(r3)
+ lwz r6, SS_IBAT+0x28(r3)
+ lwz r7, SS_IBAT+0x2c(r3)
+
+ mtspr SPRN_IBAT4U, r4
+ mtspr SPRN_IBAT4L, r5
+ mtspr SPRN_IBAT5U, r6
+ mtspr SPRN_IBAT5L, r7
+
+ lwz r4, SS_IBAT+0x30(r3)
+ lwz r5, SS_IBAT+0x34(r3)
+ lwz r6, SS_IBAT+0x38(r3)
+ lwz r7, SS_IBAT+0x3c(r3)
+
+ mtspr SPRN_IBAT6U, r4
+ mtspr SPRN_IBAT6L, r5
+ mtspr SPRN_IBAT7U, r6
+ mtspr SPRN_IBAT7L, r7
+
+ lwz r4, SS_SPRG+0(r3)
+ lwz r5, SS_SPRG+4(r3)
+ lwz r6, SS_SPRG+8(r3)
+ lwz r7, SS_SPRG+12(r3)
+ lwz r8, SS_SDR1(r3)
+
+ mtspr SPRN_SPRG0, r4
+ mtspr SPRN_SPRG1, r5
+ mtspr SPRN_SPRG2, r6
+ mtspr SPRN_SPRG3, r7
+ mtsdr1 r8
+
+ lwz r4, SS_MSR(r3)
+ lwz r5, SS_LR(r3)
+ lwz r6, SS_CR(r3)
+ lwz r1, SS_SP(r3)
+ lwz r2, SS_CURRENT(r3)
+
+ mtsrr1 r4
+ mtsrr0 r5
+ mtcr r6
+
+ li r4, 0
+ mtspr SPRN_TBWL, r4
+
+ lwz r4, SS_TB+0(r3)
+ lwz r5, SS_TB+4(r3)
+
+ mtspr SPRN_TBWU, r4
+ mtspr SPRN_TBWL, r5
+
+ lmw r12, SS_GPREG(r3)
+
+ /* Kick decrementer */
+ li r0, 1
+ mtdec r0
+
+ rfi
diff --git a/arch/powerpc/platforms/83xx/suspend.c
b/arch/powerpc/platforms/83xx/suspend.c
new file mode 100644
index 0000000..61bca38
--- /dev/null
+++ b/arch/powerpc/platforms/83xx/suspend.c
@@ -0,0 +1,423 @@
+/*
+ * MPC83xx suspend support
+ *
+ * Author: Scott Wood <[EMAIL PROTECTED]>
+ *
+ * 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 <linux/init.h>
+#include <linux/pm.h>
+#include <linux/types.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/wait.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
+#include <linux/suspend.h>
+#include <linux/fsl_devices.h>
+#include <linux/of_platform.h>
+
+#include <asm/reg.h>
+#include <asm/io.h>
+#include <asm/time.h>
+#include <asm/mpc6xx.h>
+
+#include <sysdev/fsl_soc.h>
+
+#define PMCCR1_NEXT_STATE 0x0C /* Next state for power management */
+#define PMCCR1_NEXT_STATE_SHIFT 2
+#define PMCCR1_CURR_STATE 0x03 /* Current state for power management*/
+#define IMMR_RCW_OFFSET 0x900
+#define RCW_PCI_HOST 0x80000000
+
+void mpc83xx_enter_deep_sleep(phys_addr_t immrbase);
+
+struct mpc83xx_pmc {
+ u32 config;
+#define PMCCR_DLPEN 2 /* DDR SDRAM low power enable */
+#define PMCCR_SLPEN 1 /* System low power enable */
+
+ u32 event;
+ u32 mask;
+/* All but PMCI are deep-sleep only */
+#define PMCER_GPIO 0x100
+#define PMCER_PCI 0x080
+#define PMCER_USB 0x040
+#define PMCER_ETSEC1 0x020
+#define PMCER_ETSEC2 0x010
+#define PMCER_TIMER 0x008
+#define PMCER_INT1 0x004
+#define PMCER_INT2 0x002
+#define PMCER_PMCI 0x001
+#define PMCER_ALL 0x1FF
+
+ /* deep-sleep only */
+ u32 config1;
+#define PMCCR1_USE_STATE 0x80000000
+#define PMCCR1_PME_EN 0x00000080
+#define PMCCR1_ASSERT_PME 0x00000040
+#define PMCCR1_POWER_OFF 0x00000020
+
+ /* deep-sleep only */
+ u32 config2;
+};
+
+struct mpc83xx_rcw {
+ u32 rcwlr;
+ u32 rcwhr;
+};
+
+struct mpc83xx_clock {
+ u32 spmr;
+ u32 occr;
+ u32 sccr;
+};
+
+struct pmc_type {
+ int has_deep_sleep;
+};
+
+static struct of_device *pmc_dev;
+static int has_deep_sleep, deep_sleeping;
+static int pmc_irq;
+static struct mpc83xx_pmc __iomem *pmc_regs;
+static struct mpc83xx_clock __iomem *clock_regs;
+static int is_pci_agent, wake_from_pci;
+static phys_addr_t immrbase;
+static int pci_pm_state;
+static DECLARE_WAIT_QUEUE_HEAD(agent_wq);
+
+static u32 saved_sccr;
+static DEFINE_SPINLOCK(device_sleep_lock);
+
+void fsl_sleep_device(struct fsl_sleep_platform_data *data)
+{
+ if (clock_regs && data->sccr_mask) {
+ unsigned long flags;
+ u32 sccr;
+
+ spin_lock_irqsave(&device_sleep_lock, flags);
+ sccr = in_be32(&clock_regs->sccr);
+
+ saved_sccr &= ~data->sccr_mask;
+ saved_sccr |= sccr & data->sccr_mask;
+
+ out_be32(&clock_regs->sccr, sccr & ~data->sccr_mask);
+ spin_unlock_irqrestore(&device_sleep_lock, flags);
+ }
+}
+EXPORT_SYMBOL(fsl_sleep_device);
+
+void fsl_wake_device(struct fsl_sleep_platform_data *data)
+{
+ if (clock_regs && data->sccr_mask) {
+ unsigned long flags;
+ u32 sccr;
+
+ spin_lock_irqsave(&device_sleep_lock, flags);
+
+ sccr = in_be32(&clock_regs->sccr);
+ sccr |= saved_sccr & data->sccr_mask;
+ out_be32(&clock_regs->sccr, sccr);
+
+ spin_unlock_irqrestore(&device_sleep_lock, flags);
+ }
+}
+EXPORT_SYMBOL(fsl_wake_device);
+
+int fsl_deep_sleep(void)
+{
+ return deep_sleeping;
+}
+
+static int mpc83xx_change_state(void)
+{
+ u32 curr_state;
+ u32 reg_cfg1 = in_be32(&pmc_regs->config1);
+
+ if (is_pci_agent) {
+ pci_pm_state = (reg_cfg1 & PMCCR1_NEXT_STATE) >>
+ PMCCR1_NEXT_STATE_SHIFT;
+ curr_state = reg_cfg1 & PMCCR1_CURR_STATE;
+
+ if (curr_state != pci_pm_state) {
+ reg_cfg1 &= ~PMCCR1_CURR_STATE;
+ reg_cfg1 |= pci_pm_state;
+ out_be32(&pmc_regs->config1, reg_cfg1);
+
+ wake_up(&agent_wq);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static irqreturn_t pmc_irq_handler(int irq, void *dev_id)
+{
+ u32 event = in_be32(&pmc_regs->event);
+ int ret = IRQ_NONE;
+
+ if (mpc83xx_change_state())
+ ret = IRQ_HANDLED;
+
+ if (event) {
+ out_be32(&pmc_regs->event, event);
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+static int mpc83xx_suspend_enter(suspend_state_t state)
+{
+ int ret = -EAGAIN;
+
+ /* Don't go to sleep if there's a race where pci_pm_state changes
+ * between the agent thread checking it and the PM code disabling
+ * interrupts.
+ */
+ if (wake_from_pci) {
+ if (pci_pm_state != (deep_sleeping ? 3 : 2))
+ goto out;
+
+ out_be32(&pmc_regs->config1,
+ in_be32(&pmc_regs->config1) | PMCCR1_PME_EN);
+ }
+
+ /* Put the system into low-power mode and the RAM
+ * into self-refresh mode once the core goes to
+ * sleep.
+ */
+
+ out_be32(&pmc_regs->config, PMCCR_SLPEN | PMCCR_DLPEN);
+
+ /* If it has deep sleep (i.e. it's an 831x or compatible),
+ * disable power to the core upon entering sleep mode. This will
+ * require going through the boot firmware upon a wakeup event.
+ */
+
+ if (deep_sleeping) {
+ out_be32(&pmc_regs->mask, PMCER_ALL);
+
+ out_be32(&pmc_regs->config1,
+ in_be32(&pmc_regs->config1) | PMCCR1_POWER_OFF);
+
+ enable_kernel_fp();
+
+ mpc83xx_enter_deep_sleep(immrbase);
+
+ out_be32(&pmc_regs->config1,
+ in_be32(&pmc_regs->config1) & ~PMCCR1_POWER_OFF);
+
+ out_be32(&pmc_regs->mask, PMCER_PMCI);
+ } else {
+ out_be32(&pmc_regs->mask, PMCER_PMCI);
+
+ mpc6xx_enter_standby();
+ }
+
+ ret = 0;
+
+out:
+ out_be32(&pmc_regs->config1,
+ in_be32(&pmc_regs->config1) & ~PMCCR1_PME_EN);
+
+ return ret;
+}
+
+static void mpc83xx_suspend_finish(void)
+{
+ deep_sleeping = 0;
+}
+
+static int mpc83xx_suspend_valid(suspend_state_t state)
+{
+ return state == PM_SUSPEND_STANDBY || state == PM_SUSPEND_MEM;
+}
+
+static int mpc83xx_suspend_set_target(suspend_state_t state)
+{
+ switch (state) {
+ case PM_SUSPEND_STANDBY:
+ deep_sleeping = 0;
+ return 0;
+
+ case PM_SUSPEND_MEM:
+ if (has_deep_sleep)
+ deep_sleeping = 1;
+
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int agent_thread_fn(void *data)
+{
+ while (1) {
+ wait_event_interruptible(agent_wq, pci_pm_state >= 2);
+ try_to_freeze();
+
+ if (signal_pending(current) || pci_pm_state < 2)
+ continue;
+
+ /* With a preemptible kernel (or SMP), this could race with a
+ * userspace-driven suspend request. It's probably best to
+ * avoid mixing the two with such a configuration (or else fix
+ * it by adding a mutex to state_store that we can synchronize
+ * with).
+ */
+
+ wake_from_pci = 1;
+
+ pm_suspend(pci_pm_state == 3 ? PM_SUSPEND_MEM :
+ PM_SUSPEND_STANDBY);
+
+ wake_from_pci = 0;
+ }
+
+ return 0;
+}
+
+void mpc83xx_set_agent(void)
+{
+ out_be32(&pmc_regs->config1, PMCCR1_USE_STATE);
+ out_be32(&pmc_regs->mask, PMCER_PMCI);
+
+ kthread_run(agent_thread_fn, NULL, "PCI power mgt");
+}
+
+static int mpc83xx_is_pci_agent(void)
+{
+ struct mpc83xx_rcw __iomem *rcw_regs;
+ int ret;
+
+ rcw_regs = ioremap(get_immrbase() + IMMR_RCW_OFFSET,
+ sizeof(struct mpc83xx_rcw));
+
+ if (!rcw_regs)
+ return -ENOMEM;
+
+ ret = !(in_be32(&rcw_regs->rcwhr) & RCW_PCI_HOST);
+
+ iounmap(rcw_regs);
+ return ret;
+}
+
+static struct platform_suspend_ops mpc83xx_suspend_ops = {
+ .valid = mpc83xx_suspend_valid,
+ .set_target = mpc83xx_suspend_set_target,
+ .enter = mpc83xx_suspend_enter,
+ .finish = mpc83xx_suspend_finish,
+};
+
+static int pmc_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
+{
+ struct device_node *np = ofdev->node;
+ struct resource res;
+ struct pmc_type *type = match->data;
+ int ret = 0;
+
+ has_deep_sleep = type->has_deep_sleep;
+ immrbase = get_immrbase();
+ pmc_dev = ofdev;
+
+ is_pci_agent = mpc83xx_is_pci_agent();
+ if (is_pci_agent < 0)
+ return is_pci_agent;
+
+ ret = of_address_to_resource(np, 0, &res);
+ if (ret)
+ return -ENODEV;
+
+ pmc_irq = irq_of_parse_and_map(np, 0);
+ if (pmc_irq != NO_IRQ) {
+ ret = request_irq(pmc_irq, pmc_irq_handler, IRQF_SHARED,
+ "pmc", ofdev);
+
+ if (ret)
+ return -EBUSY;
+ }
+
+ pmc_regs = ioremap(res.start, sizeof(struct mpc83xx_pmc));
+
+ if (!pmc_regs) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = of_address_to_resource(np, 1, &res);
+ if (ret) {
+ ret = -ENODEV;
+ goto out_pmc;
+ }
+
+ clock_regs = ioremap(res.start, sizeof(struct mpc83xx_pmc));
+
+ if (!clock_regs) {
+ ret = -ENOMEM;
+ goto out_pmc;
+ }
+
+ if (is_pci_agent)
+ mpc83xx_set_agent();
+
+ suspend_set_ops(&mpc83xx_suspend_ops);
+ return 0;
+
+out_pmc:
+ iounmap(pmc_regs);
+out:
+ if (pmc_irq != NO_IRQ)
+ free_irq(pmc_irq, ofdev);
+
+ return ret;
+}
+
+static int pmc_remove(struct of_device *ofdev)
+{
+ return -EPERM;
+};
+
+static struct pmc_type pmc_types[] = {
+ {
+ .has_deep_sleep = 1,
+ },
+ {
+ .has_deep_sleep = 0,
+ }
+};
+
+static struct of_device_id pmc_match[] = {
+ {
+ .compatible = "fsl,mpc8313-pmc",
+ .data = &pmc_types[0],
+ },
+ {
+ .compatible = "fsl,mpc8349-pmc",
+ .data = &pmc_types[1],
+ },
+ {}
+};
+
+static struct of_platform_driver pmc_driver = {
+ .name = "mpc83xx-pmc",
+ .match_table = pmc_match,
+ .probe = pmc_probe,
+ .remove = pmc_remove
+};
+
+static int pmc_init(void)
+{
+ return of_register_platform_driver(&pmc_driver);
+}
+
+module_init(pmc_init);
diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index e1ba33c..d5fd916 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -151,6 +151,33 @@ u32 get_baudrate(void)
EXPORT_SYMBOL(get_baudrate);
#endif /* CONFIG_CPM2 */
+int fsl_sleep_init(struct fsl_sleep_platform_data *sleep,
+ struct device_node *node)
+{
+ int proplen, ret = -ENODEV;
+ const u32 *sleepdata = of_get_property(node, "sleep", &proplen);
+ struct device_node *sleep_controller;
+
+ if (!sleepdata || proplen != 8)
+ return -ENODEV;
+
+ sleep_controller = of_find_node_by_phandle(sleepdata[0]);
+ if (!sleep_controller)
+ return -ENODEV;
+
+ /* There can only be one fsl,mpc83xx-pmc device in the system;
+ * it is assumed that it is the one that the pmc driver matches.
+ */
+ if (of_device_is_compatible(sleep_controller, "fsl,mpc83xx-pmc")) {
+ sleep->sccr_mask = sleepdata[1];
+ ret = 0;
+ }
+
+ of_node_put(sleep_controller);
+ return ret;
+}
+EXPORT_SYMBOL(fsl_sleep_init);
+
static int __init gfar_mdio_of_init(void)
{
struct device_node *np;
@@ -321,6 +348,8 @@ static int __init gfar_of_init(void)
of_node_put(phy);
of_node_put(mdio);
+ fsl_sleep_init(&gfar_data.sleep, np);
+
ret =
platform_device_add_data(gfar_dev, &gfar_data,
sizeof(struct
@@ -576,6 +605,8 @@ static int __init fsl_usb_of_init(void)
prop = of_get_property(np, "phy_type", NULL);
usb_data.phy_mode = determine_usb_phy(prop);
+ fsl_sleep_init(&usb_data.sleep, np);
+
ret =
platform_device_add_data(usb_dev_mph, &usb_data,
sizeof(struct
@@ -640,6 +671,8 @@ static int __init fsl_usb_of_init(void)
prop = of_get_property(np, "phy_type", NULL);
usb_data.phy_mode = determine_usb_phy(prop);
+ fsl_sleep_init(&usb_data.sleep, np);
+
if (usb_dev_dr_host) {
usb_dev_dr_host->dev.coherent_dma_mask = 0xffffffffUL;
usb_dev_dr_host->dev.dma_mask = &usb_dev_dr_host->
diff --git a/arch/powerpc/sysdev/fsl_soc.h b/arch/powerpc/sysdev/fsl_soc.h
index 74c4a96..fb52d39 100644
--- a/arch/powerpc/sysdev/fsl_soc.h
+++ b/arch/powerpc/sysdev/fsl_soc.h
@@ -10,12 +10,22 @@ extern u32 get_baudrate(void);
extern u32 fsl_get_sys_freq(void);
struct spi_board_info;
+struct fsl_sleep_platform_data;
+struct device_node;
extern int fsl_spi_init(struct spi_board_info *board_infos,
unsigned int num_board_infos,
void (*activate_cs)(u8 cs, u8 polarity),
void (*deactivate_cs)(u8 cs, u8 polarity));
+int fsl_sleep_init(struct fsl_sleep_platform_data *sleep,
+ struct device_node *node);
+
+/* Calls to fsl_sleep_dev and fsl_wake_dev cannot be nested. */
+void fsl_sleep_dev(struct fsl_sleep_platform_data *sleep);
+void fsl_wake_dev(struct fsl_sleep_platform_data *sleep);
+
extern void fsl_rstcr_restart(char *cmd);
+
#endif
#endif
diff --git a/arch/powerpc/sysdev/ipic.c b/arch/powerpc/sysdev/ipic.c
index 05a56e5..e2388cf 100644
--- a/arch/powerpc/sysdev/ipic.c
+++ b/arch/powerpc/sysdev/ipic.c
@@ -22,6 +22,7 @@
#include <linux/device.h>
#include <linux/bootmem.h>
#include <linux/spinlock.h>
+#include <linux/fsl_devices.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/prom.h>
@@ -724,8 +725,78 @@ unsigned int ipic_get_irq(void)
return irq_linear_revmap(primary_ipic->irqhost, irq);
}
+#ifdef CONFIG_PM
+static struct {
+ u32 sicfr;
+ u32 siprr[2];
+ u32 simsr[2];
+ u32 sicnr;
+ u32 smprr[2];
+ u32 semsr;
+ u32 secnr;
+ u32 sermr;
+ u32 sercr;
+} ipic_saved_state;
+
+static int ipic_suspend(struct sys_device *sdev, pm_message_t state)
+{
+ struct ipic *ipic = primary_ipic;
+
+ ipic_saved_state.sicfr = ipic_read(ipic->regs, IPIC_SICFR);
+ ipic_saved_state.siprr[0] = ipic_read(ipic->regs, IPIC_SIPRR_A);
+ ipic_saved_state.siprr[1] = ipic_read(ipic->regs, IPIC_SIPRR_D);
+ ipic_saved_state.simsr[0] = ipic_read(ipic->regs, IPIC_SIMSR_H);
+ ipic_saved_state.simsr[1] = ipic_read(ipic->regs, IPIC_SIMSR_L);
+ ipic_saved_state.sicnr = ipic_read(ipic->regs, IPIC_SICNR);
+ ipic_saved_state.smprr[0] = ipic_read(ipic->regs, IPIC_SMPRR_A);
+ ipic_saved_state.smprr[1] = ipic_read(ipic->regs, IPIC_SMPRR_B);
+ ipic_saved_state.semsr = ipic_read(ipic->regs, IPIC_SEMSR);
+ ipic_saved_state.secnr = ipic_read(ipic->regs, IPIC_SECNR);
+ ipic_saved_state.sermr = ipic_read(ipic->regs, IPIC_SERMR);
+ ipic_saved_state.sercr = ipic_read(ipic->regs, IPIC_SERCR);
+
+ if (fsl_deep_sleep()) {
+ /* In deep sleep, make sure there can be no
+ * pending interrupts, as this can cause
+ * problems on 831x.
+ */
+ ipic_write(ipic->regs, IPIC_SIMSR_H, 0);
+ ipic_write(ipic->regs, IPIC_SIMSR_L, 0);
+ ipic_write(ipic->regs, IPIC_SEMSR, 0);
+ ipic_write(ipic->regs, IPIC_SERMR, 0);
+ }
+
+ return 0;
+}
+
+static int ipic_resume(struct sys_device *sdev)
+{
+ struct ipic *ipic = primary_ipic;
+
+ ipic_write(ipic->regs, IPIC_SICFR, ipic_saved_state.sicfr);
+ ipic_write(ipic->regs, IPIC_SIPRR_A, ipic_saved_state.siprr[0]);
+ ipic_write(ipic->regs, IPIC_SIPRR_D, ipic_saved_state.siprr[1]);
+ ipic_write(ipic->regs, IPIC_SIMSR_H, ipic_saved_state.simsr[0]);
+ ipic_write(ipic->regs, IPIC_SIMSR_L, ipic_saved_state.simsr[1]);
+ ipic_write(ipic->regs, IPIC_SICNR, ipic_saved_state.sicnr);
+ ipic_write(ipic->regs, IPIC_SMPRR_A, ipic_saved_state.smprr[0]);
+ ipic_write(ipic->regs, IPIC_SMPRR_B, ipic_saved_state.smprr[1]);
+ ipic_write(ipic->regs, IPIC_SEMSR, ipic_saved_state.semsr);
+ ipic_write(ipic->regs, IPIC_SECNR, ipic_saved_state.secnr);
+ ipic_write(ipic->regs, IPIC_SERMR, ipic_saved_state.sermr);
+ ipic_write(ipic->regs, IPIC_SERCR, ipic_saved_state.sercr);
+
+ return 0;
+}
+#else
+#define ipic_suspend NULL
+#define ipic_resume NULL
+#endif
+
static struct sysdev_class ipic_sysclass = {
set_kset_name("ipic"),
+ .suspend = ipic_suspend,
+ .resume = ipic_resume,
};
static struct sys_device device_ipic = {
diff --git a/include/asm-powerpc/reg.h b/include/asm-powerpc/reg.h
index 1f68504..68968c1 100644
--- a/include/asm-powerpc/reg.h
+++ b/include/asm-powerpc/reg.h
@@ -149,7 +149,9 @@
#define CTRL_RUNLATCH 0x1
#define SPRN_DABR 0x3F5 /* Data Address Breakpoint Register */
#define DABR_TRANSLATION (1UL << 2)
+#define SPRN_DABR2 0x13D /* 83xx */
#define SPRN_DAR 0x013 /* Data Address Register */
+#define SPRN_DBCR 0x136 /* 83xx Data Breakpoint Control Reg */
#define SPRN_DSISR 0x012 /* Data Storage Interrupt Status Register */
#define DSISR_NOHPTE 0x40000000 /* no translation found */
#define DSISR_PROTFAULT 0x08000000 /* protection fault */
@@ -255,6 +257,8 @@
#define HID1_PS (1<<16) /* 750FX PLL selection */
#define SPRN_HID2 0x3F8 /* Hardware Implementation Register 2 */
#define SPRN_IABR 0x3F2 /* Instruction Address Breakpoint Register */
+#define SPRN_IABR2 0x3FA /* 83xx */
+#define SPRN_IBCR 0x135 /* 83xx Insn Breakpoint Control Reg */
#define SPRN_HID4 0x3F4 /* 970 HID4 */
#define SPRN_HID5 0x3F6 /* 970 HID5 */
#define SPRN_HID6 0x3F9 /* BE HID 6 */
diff --git a/include/linux/fsl_devices.h b/include/linux/fsl_devices.h
index 1831b19..5cec939 100644
--- a/include/linux/fsl_devices.h
+++ b/include/linux/fsl_devices.h
@@ -45,10 +45,27 @@
*
*/
+struct fsl_sleep_platform_data {
+ /*
+ * The bits set in this mask will be cleared in the SCCR
+ * when put to sleep, and restored on wakeup.
+ */
+ u32 sccr_mask;
+};
+
+/*
+ * Calls to fsl_sleep_device do not nest -- if you call
+ * sleep twice without an intervening wake, you will not
+ * be able to wake the device again.
+ */
+void fsl_sleep_device(struct fsl_sleep_platform_data *data);
+void fsl_wake_device(struct fsl_sleep_platform_data *data);
+
struct gianfar_platform_data {
/* device specific information */
u32 device_flags;
/* board specific information */
+ struct fsl_sleep_platform_data sleep;
u32 board_flags;
u32 bus_id;
u32 phy_id;
@@ -104,6 +121,7 @@ struct fsl_usb2_platform_data {
enum fsl_usb2_operating_modes operating_mode;
enum fsl_usb2_phy_modes phy_mode;
unsigned int port_enables;
+ struct fsl_sleep_platform_data sleep;
};
/* Flags in fsl_usb2_mph_platform_data */
@@ -126,5 +144,11 @@ struct mpc8xx_pcmcia_ops {
int(*voltage_set)(int slot, int vcc, int vpp);
};
+/* Returns non-zero if the current suspend operation would
+ * lead to a deep sleep (i.e. power removed from the core,
+ * instead of just the clock).
+ */
+int fsl_deep_sleep(void);
+
#endif /* _FSL_DEVICE_H_ */
#endif /* __KERNEL__ */
--
1.5.3.7
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