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Message-ID: <1425873029-7957-1-git-send-email-wenyou.yang@atmel.com>
Date: Mon, 9 Mar 2015 11:50:29 +0800
From: Wenyou Yang <wenyou.yang@...el.com>
To: <nicolas.ferre@...el.com>, <linux@....linux.org.uk>
CC: <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>,
<alexandre.belloni@...e-electrons.com>,
<sylvain.rochet@...secur.com>, <peda@...ntia.se>,
<sergei.shtylyov@...entembedded.com>, <linux@...im.org.za>,
<wenyou.yang@...el.com>
Subject: [PATCH v2.0 4/6] pm: at91: rename file name: pm_slowclock.S -->pm_suspend.S
Because the sram function is used for both suspend to memory and the suspend
to standby mode, renaming is more elegant.
Signed-off-by: Wenyou Yang <wenyou.yang@...el.com>
Acked-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
---
arch/arm/mach-at91/Makefile | 2 +-
arch/arm/mach-at91/pm_slowclock.S | 353 -------------------------------------
arch/arm/mach-at91/pm_suspend.S | 353 +++++++++++++++++++++++++++++++++++++
3 files changed, 354 insertions(+), 354 deletions(-)
delete mode 100644 arch/arm/mach-at91/pm_slowclock.S
create mode 100644 arch/arm/mach-at91/pm_suspend.S
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index 103c256..7df8c854 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -13,7 +13,7 @@ obj-$(CONFIG_SOC_SAMA5) += sama5.o
# Power Management
obj-$(CONFIG_PM) += pm.o
-obj-$(CONFIG_PM) += pm_slowclock.o
+obj-$(CONFIG_PM) += pm_suspend.o
ifeq ($(CONFIG_PM_DEBUG),y)
CFLAGS_pm.o += -DDEBUG
diff --git a/arch/arm/mach-at91/pm_slowclock.S b/arch/arm/mach-at91/pm_slowclock.S
deleted file mode 100644
index b0939c8..0000000
--- a/arch/arm/mach-at91/pm_slowclock.S
+++ /dev/null
@@ -1,353 +0,0 @@
-/*
- * arch/arm/mach-at91/pm_slow_clock.S
- *
- * Copyright (C) 2006 Savin Zlobec
- *
- * AT91SAM9 support:
- * Copyright (C) 2007 Anti Sullin <anti.sullin@...ecdesign.ee
- *
- * 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/linkage.h>
-#include <linux/clk/at91_pmc.h>
-#include <mach/hardware.h>
-#include <mach/at91_ramc.h>
-#include "pm.h"
-
-#define SRAMC_SELF_FRESH_ACTIVE 0x01
-#define SRAMC_SELF_FRESH_EXIT 0x00
-
-pmc .req r0
-tmp1 .req r4
-tmp2 .req r5
-
-/*
- * Wait until master clock is ready (after switching master clock source)
- */
- .macro wait_mckrdy
-1: ldr tmp1, [pmc, #AT91_PMC_SR]
- tst tmp1, #AT91_PMC_MCKRDY
- beq 1b
- .endm
-
-/*
- * Wait until master oscillator has stabilized.
- */
- .macro wait_moscrdy
-1: ldr tmp1, [pmc, #AT91_PMC_SR]
- tst tmp1, #AT91_PMC_MOSCS
- beq 1b
- .endm
-
-/*
- * Wait until PLLA has locked.
- */
- .macro wait_pllalock
-1: ldr tmp1, [pmc, #AT91_PMC_SR]
- tst tmp1, #AT91_PMC_LOCKA
- beq 1b
- .endm
-
-/*
- * Wait until PLLB has locked.
- */
- .macro wait_pllblock
-1: ldr tmp1, [pmc, #AT91_PMC_SR]
- tst tmp1, #AT91_PMC_LOCKB
- beq 1b
- .endm
-
- .text
-
-/* void at91_slow_clock(void __iomem *pmc, void __iomem *sdramc,
- * void __iomem *ramc1, int memctrl)
- */
-ENTRY(at91_slow_clock)
- /* Save registers on stack */
- stmfd sp!, {r4 - r12, lr}
-
- /*
- * Register usage:
- * R0 = Base address of AT91_PMC
- * R1 = Base address of RAM Controller (SDRAM, DDRSDR, or AT91_SYS)
- * R2 = Base address of second RAM Controller or 0 if not present
- * R3 = Memory controller
- * R4 = temporary register
- * R5 = temporary register
- */
-
- /* Drain write buffer */
- mov tmp1, #0
- mcr p15, 0, tmp1, c7, c10, 4
-
- str r0, .pmc_base
- str r1, .sramc_base
- str r2, .sramc1_base
-
- and r0, r3, #AT91_PM_MEMTYPE_MASK
- str r0, .memtype
-
- lsr r0, r3, #AT91_PM_MODE_OFFSET
- and r0, r0, #AT91_PM_MODE_MASK
- str r0, .pm_mode
-
- /* Active the self-refresh mode */
- mov r0, #SRAMC_SELF_FRESH_ACTIVE
- bl at91_sramc_self_refresh
-
- ldr r0, .pm_mode
- tst r0, #AT91_PM_SLOW_CLOCK
- beq skip_disable_main_clock
-
- ldr pmc, .pmc_base
-
- /* Save Master clock setting */
- ldr tmp1, [pmc, #AT91_PMC_MCKR]
- str tmp1, .saved_mckr
-
- /*
- * Set the Master clock source to slow clock
- */
- bic tmp1, tmp1, #AT91_PMC_CSS
- str tmp1, [pmc, #AT91_PMC_MCKR]
-
- wait_mckrdy
-
- /* Save PLLA setting and disable it */
- ldr tmp1, [pmc, #AT91_CKGR_PLLAR]
- str tmp1, .saved_pllar
-
- mov tmp1, #AT91_PMC_PLLCOUNT
- orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */
- str tmp1, [pmc, #AT91_CKGR_PLLAR]
-
- /* Save PLLB setting and disable it */
- ldr tmp1, [pmc, #AT91_CKGR_PLLBR]
- str tmp1, .saved_pllbr
-
- mov tmp1, #AT91_PMC_PLLCOUNT
- str tmp1, [pmc, #AT91_CKGR_PLLBR]
-
- /* Turn off the main oscillator */
- ldr tmp1, [pmc, #AT91_CKGR_MOR]
- bic tmp1, tmp1, #AT91_PMC_MOSCEN
- orr tmp1, tmp1, #AT91_PMC_KEY
- str tmp1, [pmc, #AT91_CKGR_MOR]
-
-skip_disable_main_clock:
- ldr pmc, .pmc_base
-
- /* Wait for interrupt */
- mcr p15, 0, tmp1, c7, c0, 4
-
- ldr r0, .pm_mode
- tst r0, #AT91_PM_SLOW_CLOCK
- beq skip_enable_main_clock
-
- ldr pmc, .pmc_base
-
- /* Turn on the main oscillator */
- ldr tmp1, [pmc, #AT91_CKGR_MOR]
- orr tmp1, tmp1, #AT91_PMC_MOSCEN
- orr tmp1, tmp1, #AT91_PMC_KEY
- str tmp1, [pmc, #AT91_CKGR_MOR]
-
- wait_moscrdy
-
- /* Restore PLLB setting */
- ldr tmp1, .saved_pllbr
- str tmp1, [pmc, #AT91_CKGR_PLLBR]
-
- tst tmp1, #(AT91_PMC_MUL & 0xff0000)
- bne 1f
- tst tmp1, #(AT91_PMC_MUL & ~0xff0000)
- beq 2f
-1:
- wait_pllblock
-2:
-
- /* Restore PLLA setting */
- ldr tmp1, .saved_pllar
- str tmp1, [pmc, #AT91_CKGR_PLLAR]
-
- tst tmp1, #(AT91_PMC_MUL & 0xff0000)
- bne 3f
- tst tmp1, #(AT91_PMC_MUL & ~0xff0000)
- beq 4f
-3:
- wait_pllalock
-4:
-
- /*
- * Restore master clock setting
- */
- ldr tmp1, .saved_mckr
- str tmp1, [pmc, #AT91_PMC_MCKR]
-
- wait_mckrdy
-
-skip_enable_main_clock:
- /* Exit the self-refresh mode */
- mov r0, #SRAMC_SELF_FRESH_EXIT
- bl at91_sramc_self_refresh
-
- /* Restore registers, and return */
- ldmfd sp!, {r4 - r12, pc}
-ENDPROC(at91_slow_clock)
-
-/*
- * void at91_sramc_self_refresh(unsigned int is_active)
- *
- * @input param:
- * @r0: 1 - active self-refresh mode
- * 0 - exit self-refresh mode
- * register usage:
- * @r1: memory type
- * @r2: base address of the sram controller
- */
-
-ENTRY(at91_sramc_self_refresh)
- ldr r1, .memtype
- ldr r2, .sramc_base
-
- cmp r1, #AT91_MEMCTRL_MC
- bne ddrc_sf
-
- /*
- * at91rm9200 Memory controller
- */
-
- /*
- * For exiting the self-refresh mode, do nothing,
- * automatically exit the self-refresh mode.
- */
- tst r0, #SRAMC_SELF_FRESH_ACTIVE
- beq exit_sramc_sf
-
- /* Active SDRAM self-refresh mode */
- mov r3, #1
- str r3, [r2, #AT91RM9200_SDRAMC_SRR]
- b exit_sramc_sf
-
-ddrc_sf:
- cmp r1, #AT91_MEMCTRL_DDRSDR
- bne sdramc_sf
-
- /*
- * DDR Memory controller
- */
- tst r0, #SRAMC_SELF_FRESH_ACTIVE
- beq ddrc_exit_sf
-
- /* LPDDR1 --> force DDR2 mode during self-refresh */
- ldr r3, [r2, #AT91_DDRSDRC_MDR]
- str r3, .saved_sam9_mdr
- bic r3, r3, #~AT91_DDRSDRC_MD
- cmp r3, #AT91_DDRSDRC_MD_LOW_POWER_DDR
- ldreq r3, [r2, #AT91_DDRSDRC_MDR]
- biceq r3, r3, #AT91_DDRSDRC_MD
- orreq r3, r3, #AT91_DDRSDRC_MD_DDR2
- streq r3, [r2, #AT91_DDRSDRC_MDR]
-
- /* Active DDRC self-refresh mode */
- ldr r3, [r2, #AT91_DDRSDRC_LPR]
- str r3, .saved_sam9_lpr
- bic r3, r3, #AT91_DDRSDRC_LPCB
- orr r3, r3, #AT91_DDRSDRC_LPCB_SELF_REFRESH
- str r3, [r2, #AT91_DDRSDRC_LPR]
-
- /* If using the 2nd ddr controller */
- ldr r2, .sramc1_base
- cmp r2, #0
- beq no_2nd_ddrc
-
- ldr r3, [r2, #AT91_DDRSDRC_MDR]
- str r3, .saved_sam9_mdr1
- bic r3, r3, #~AT91_DDRSDRC_MD
- cmp r3, #AT91_DDRSDRC_MD_LOW_POWER_DDR
- ldreq r3, [r2, #AT91_DDRSDRC_MDR]
- biceq r3, r3, #AT91_DDRSDRC_MD
- orreq r3, r3, #AT91_DDRSDRC_MD_DDR2
- streq r3, [r2, #AT91_DDRSDRC_MDR]
-
- ldr r3, [r2, #AT91_DDRSDRC_LPR]
- str r3, .saved_sam9_lpr1
- bic r3, r3, #AT91_DDRSDRC_LPCB
- orr r3, r3, #AT91_DDRSDRC_LPCB_SELF_REFRESH
-
- /* Active DDRC self-refresh mode */
- str r3, [r2, #AT91_DDRSDRC_LPR]
-no_2nd_ddrc:
- b exit_sramc_sf
-
-ddrc_exit_sf:
- /* Restore MDR in case of LPDDR1 */
- ldr r3, .saved_sam9_mdr
- str r3, [r2, #AT91_DDRSDRC_MDR]
- /* Restore LPR on AT91 with DDRAM */
- ldr r3, .saved_sam9_lpr
- str r3, [r2, #AT91_DDRSDRC_LPR]
-
- /* If using the 2nd ddr controller */
- ldr r2, .sramc1_base
- cmp r2, #0
- ldrne r3, .saved_sam9_mdr1
- strne r3, [r2, #AT91_DDRSDRC_MDR]
- ldrne r3, .saved_sam9_lpr1
- strne r3, [r2, #AT91_DDRSDRC_LPR]
-
- b exit_sramc_sf
-
- /*
- * SDRAMC Memory controller
- */
-sdramc_sf:
- tst r0, #SRAMC_SELF_FRESH_ACTIVE
- beq sdramc_exit_sf
-
- /* Active SDRAMC self-refresh mode */
- ldr r3, [r2, #AT91_SDRAMC_LPR]
- str r3, .saved_sam9_lpr
-
- bic r3, r3, #AT91_SDRAMC_LPCB
- orr r3, r3, #AT91_SDRAMC_LPCB_SELF_REFRESH
- str r3, [r2, #AT91_SDRAMC_LPR]
-
-sdramc_exit_sf:
- ldr r3, .saved_sam9_lpr
- str r3, [r2, #AT91_SDRAMC_LPR]
-
-exit_sramc_sf:
- mov pc, lr
-ENDPROC(at91_sramc_self_refresh)
-
-.pmc_base:
- .word 0
-.sramc_base:
- .word 0
-.sramc1_base:
- .word 0
-.memtype:
- .word 0
-.pm_mode:
- .word 0
-.saved_mckr:
- .word 0
-.saved_pllar:
- .word 0
-.saved_pllbr:
- .word 0
-.saved_sam9_lpr:
- .word 0
-.saved_sam9_lpr1:
- .word 0
-.saved_sam9_mdr:
- .word 0
-.saved_sam9_mdr1:
- .word 0
-
-ENTRY(at91_slow_clock_sz)
- .word .-at91_slow_clock
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
new file mode 100644
index 0000000..a2bd1dc
--- /dev/null
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -0,0 +1,353 @@
+/*
+ * arch/arm/mach-at91/pm_suspend.S
+ *
+ * Copyright (C) 2006 Savin Zlobec
+ *
+ * AT91SAM9 support:
+ * Copyright (C) 2007 Anti Sullin <anti.sullin@...ecdesign.ee
+ *
+ * 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/linkage.h>
+#include <linux/clk/at91_pmc.h>
+#include <mach/hardware.h>
+#include <mach/at91_ramc.h>
+#include "pm.h"
+
+#define SRAMC_SELF_FRESH_ACTIVE 0x01
+#define SRAMC_SELF_FRESH_EXIT 0x00
+
+pmc .req r0
+tmp1 .req r4
+tmp2 .req r5
+
+/*
+ * Wait until master clock is ready (after switching master clock source)
+ */
+ .macro wait_mckrdy
+1: ldr tmp1, [pmc, #AT91_PMC_SR]
+ tst tmp1, #AT91_PMC_MCKRDY
+ beq 1b
+ .endm
+
+/*
+ * Wait until master oscillator has stabilized.
+ */
+ .macro wait_moscrdy
+1: ldr tmp1, [pmc, #AT91_PMC_SR]
+ tst tmp1, #AT91_PMC_MOSCS
+ beq 1b
+ .endm
+
+/*
+ * Wait until PLLA has locked.
+ */
+ .macro wait_pllalock
+1: ldr tmp1, [pmc, #AT91_PMC_SR]
+ tst tmp1, #AT91_PMC_LOCKA
+ beq 1b
+ .endm
+
+/*
+ * Wait until PLLB has locked.
+ */
+ .macro wait_pllblock
+1: ldr tmp1, [pmc, #AT91_PMC_SR]
+ tst tmp1, #AT91_PMC_LOCKB
+ beq 1b
+ .endm
+
+ .text
+
+/* void at91_slow_clock(void __iomem *pmc, void __iomem *sdramc,
+ * void __iomem *ramc1, int memctrl)
+ */
+ENTRY(at91_slow_clock)
+ /* Save registers on stack */
+ stmfd sp!, {r4 - r12, lr}
+
+ /*
+ * Register usage:
+ * R0 = Base address of AT91_PMC
+ * R1 = Base address of RAM Controller (SDRAM, DDRSDR, or AT91_SYS)
+ * R2 = Base address of second RAM Controller or 0 if not present
+ * R3 = Memory controller
+ * R4 = temporary register
+ * R5 = temporary register
+ */
+
+ /* Drain write buffer */
+ mov tmp1, #0
+ mcr p15, 0, tmp1, c7, c10, 4
+
+ str r0, .pmc_base
+ str r1, .sramc_base
+ str r2, .sramc1_base
+
+ and r0, r3, #AT91_PM_MEMTYPE_MASK
+ str r0, .memtype
+
+ lsr r0, r3, #AT91_PM_MODE_OFFSET
+ and r0, r0, #AT91_PM_MODE_MASK
+ str r0, .pm_mode
+
+ /* Active the self-refresh mode */
+ mov r0, #SRAMC_SELF_FRESH_ACTIVE
+ bl at91_sramc_self_refresh
+
+ ldr r0, .pm_mode
+ tst r0, #AT91_PM_SLOW_CLOCK
+ beq skip_disable_main_clock
+
+ ldr pmc, .pmc_base
+
+ /* Save Master clock setting */
+ ldr tmp1, [pmc, #AT91_PMC_MCKR]
+ str tmp1, .saved_mckr
+
+ /*
+ * Set the Master clock source to slow clock
+ */
+ bic tmp1, tmp1, #AT91_PMC_CSS
+ str tmp1, [pmc, #AT91_PMC_MCKR]
+
+ wait_mckrdy
+
+ /* Save PLLA setting and disable it */
+ ldr tmp1, [pmc, #AT91_CKGR_PLLAR]
+ str tmp1, .saved_pllar
+
+ mov tmp1, #AT91_PMC_PLLCOUNT
+ orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */
+ str tmp1, [pmc, #AT91_CKGR_PLLAR]
+
+ /* Save PLLB setting and disable it */
+ ldr tmp1, [pmc, #AT91_CKGR_PLLBR]
+ str tmp1, .saved_pllbr
+
+ mov tmp1, #AT91_PMC_PLLCOUNT
+ str tmp1, [pmc, #AT91_CKGR_PLLBR]
+
+ /* Turn off the main oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ bic tmp1, tmp1, #AT91_PMC_MOSCEN
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+skip_disable_main_clock:
+ ldr pmc, .pmc_base
+
+ /* Wait for interrupt */
+ mcr p15, 0, tmp1, c7, c0, 4
+
+ ldr r0, .pm_mode
+ tst r0, #AT91_PM_SLOW_CLOCK
+ beq skip_enable_main_clock
+
+ ldr pmc, .pmc_base
+
+ /* Turn on the main oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_MOSCEN
+ orr tmp1, tmp1, #AT91_PMC_KEY
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscrdy
+
+ /* Restore PLLB setting */
+ ldr tmp1, .saved_pllbr
+ str tmp1, [pmc, #AT91_CKGR_PLLBR]
+
+ tst tmp1, #(AT91_PMC_MUL & 0xff0000)
+ bne 1f
+ tst tmp1, #(AT91_PMC_MUL & ~0xff0000)
+ beq 2f
+1:
+ wait_pllblock
+2:
+
+ /* Restore PLLA setting */
+ ldr tmp1, .saved_pllar
+ str tmp1, [pmc, #AT91_CKGR_PLLAR]
+
+ tst tmp1, #(AT91_PMC_MUL & 0xff0000)
+ bne 3f
+ tst tmp1, #(AT91_PMC_MUL & ~0xff0000)
+ beq 4f
+3:
+ wait_pllalock
+4:
+
+ /*
+ * Restore master clock setting
+ */
+ ldr tmp1, .saved_mckr
+ str tmp1, [pmc, #AT91_PMC_MCKR]
+
+ wait_mckrdy
+
+skip_enable_main_clock:
+ /* Exit the self-refresh mode */
+ mov r0, #SRAMC_SELF_FRESH_EXIT
+ bl at91_sramc_self_refresh
+
+ /* Restore registers, and return */
+ ldmfd sp!, {r4 - r12, pc}
+ENDPROC(at91_slow_clock)
+
+/*
+ * void at91_sramc_self_refresh(unsigned int is_active)
+ *
+ * @input param:
+ * @r0: 1 - active self-refresh mode
+ * 0 - exit self-refresh mode
+ * register usage:
+ * @r1: memory type
+ * @r2: base address of the sram controller
+ */
+
+ENTRY(at91_sramc_self_refresh)
+ ldr r1, .memtype
+ ldr r2, .sramc_base
+
+ cmp r1, #AT91_MEMCTRL_MC
+ bne ddrc_sf
+
+ /*
+ * at91rm9200 Memory controller
+ */
+
+ /*
+ * For exiting the self-refresh mode, do nothing,
+ * automatically exit the self-refresh mode.
+ */
+ tst r0, #SRAMC_SELF_FRESH_ACTIVE
+ beq exit_sramc_sf
+
+ /* Active SDRAM self-refresh mode */
+ mov r3, #1
+ str r3, [r2, #AT91RM9200_SDRAMC_SRR]
+ b exit_sramc_sf
+
+ddrc_sf:
+ cmp r1, #AT91_MEMCTRL_DDRSDR
+ bne sdramc_sf
+
+ /*
+ * DDR Memory controller
+ */
+ tst r0, #SRAMC_SELF_FRESH_ACTIVE
+ beq ddrc_exit_sf
+
+ /* LPDDR1 --> force DDR2 mode during self-refresh */
+ ldr r3, [r2, #AT91_DDRSDRC_MDR]
+ str r3, .saved_sam9_mdr
+ bic r3, r3, #~AT91_DDRSDRC_MD
+ cmp r3, #AT91_DDRSDRC_MD_LOW_POWER_DDR
+ ldreq r3, [r2, #AT91_DDRSDRC_MDR]
+ biceq r3, r3, #AT91_DDRSDRC_MD
+ orreq r3, r3, #AT91_DDRSDRC_MD_DDR2
+ streq r3, [r2, #AT91_DDRSDRC_MDR]
+
+ /* Active DDRC self-refresh mode */
+ ldr r3, [r2, #AT91_DDRSDRC_LPR]
+ str r3, .saved_sam9_lpr
+ bic r3, r3, #AT91_DDRSDRC_LPCB
+ orr r3, r3, #AT91_DDRSDRC_LPCB_SELF_REFRESH
+ str r3, [r2, #AT91_DDRSDRC_LPR]
+
+ /* If using the 2nd ddr controller */
+ ldr r2, .sramc1_base
+ cmp r2, #0
+ beq no_2nd_ddrc
+
+ ldr r3, [r2, #AT91_DDRSDRC_MDR]
+ str r3, .saved_sam9_mdr1
+ bic r3, r3, #~AT91_DDRSDRC_MD
+ cmp r3, #AT91_DDRSDRC_MD_LOW_POWER_DDR
+ ldreq r3, [r2, #AT91_DDRSDRC_MDR]
+ biceq r3, r3, #AT91_DDRSDRC_MD
+ orreq r3, r3, #AT91_DDRSDRC_MD_DDR2
+ streq r3, [r2, #AT91_DDRSDRC_MDR]
+
+ ldr r3, [r2, #AT91_DDRSDRC_LPR]
+ str r3, .saved_sam9_lpr1
+ bic r3, r3, #AT91_DDRSDRC_LPCB
+ orr r3, r3, #AT91_DDRSDRC_LPCB_SELF_REFRESH
+
+ /* Active DDRC self-refresh mode */
+ str r3, [r2, #AT91_DDRSDRC_LPR]
+no_2nd_ddrc:
+ b exit_sramc_sf
+
+ddrc_exit_sf:
+ /* Restore MDR in case of LPDDR1 */
+ ldr r3, .saved_sam9_mdr
+ str r3, [r2, #AT91_DDRSDRC_MDR]
+ /* Restore LPR on AT91 with DDRAM */
+ ldr r3, .saved_sam9_lpr
+ str r3, [r2, #AT91_DDRSDRC_LPR]
+
+ /* If using the 2nd ddr controller */
+ ldr r2, .sramc1_base
+ cmp r2, #0
+ ldrne r3, .saved_sam9_mdr1
+ strne r3, [r2, #AT91_DDRSDRC_MDR]
+ ldrne r3, .saved_sam9_lpr1
+ strne r3, [r2, #AT91_DDRSDRC_LPR]
+
+ b exit_sramc_sf
+
+ /*
+ * SDRAMC Memory controller
+ */
+sdramc_sf:
+ tst r0, #SRAMC_SELF_FRESH_ACTIVE
+ beq sdramc_exit_sf
+
+ /* Active SDRAMC self-refresh mode */
+ ldr r3, [r2, #AT91_SDRAMC_LPR]
+ str r3, .saved_sam9_lpr
+
+ bic r3, r3, #AT91_SDRAMC_LPCB
+ orr r3, r3, #AT91_SDRAMC_LPCB_SELF_REFRESH
+ str r3, [r2, #AT91_SDRAMC_LPR]
+
+sdramc_exit_sf:
+ ldr r3, .saved_sam9_lpr
+ str r3, [r2, #AT91_SDRAMC_LPR]
+
+exit_sramc_sf:
+ mov pc, lr
+ENDPROC(at91_sramc_self_refresh)
+
+.pmc_base:
+ .word 0
+.sramc_base:
+ .word 0
+.sramc1_base:
+ .word 0
+.memtype:
+ .word 0
+.pm_mode:
+ .word 0
+.saved_mckr:
+ .word 0
+.saved_pllar:
+ .word 0
+.saved_pllbr:
+ .word 0
+.saved_sam9_lpr:
+ .word 0
+.saved_sam9_lpr1:
+ .word 0
+.saved_sam9_mdr:
+ .word 0
+.saved_sam9_mdr1:
+ .word 0
+
+ENTRY(at91_slow_clock_sz)
+ .word .-at91_slow_clock
--
1.7.9.5
--
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