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Message-ID: <1422409567-24537-1-git-send-email-wenyou.yang@atmel.com>
Date: Wed, 28 Jan 2015 09:46:07 +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 v4 09/13] pm: at91: rename file name: pm_slowclock.S -->pm_suspend.S
Because the sram function is used for the suspend to standby mode as well,
more than suspend to memory, so 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 | 281 -------------------------------------
arch/arm/mach-at91/pm_suspend.S | 281 +++++++++++++++++++++++++++++++++++++
3 files changed, 282 insertions(+), 282 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 13dd3e6..aba208f 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -27,7 +27,7 @@ obj-$(CONFIG_SOC_SAMA5) += board-dt-sama5.o
# Power Management
obj-$(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 f56d114..0000000
--- a/arch/arm/mach-at91/pm_slowclock.S
+++ /dev/null
@@ -1,281 +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"
-
-pmc .req r0
-sdramc .req r1
-ramc1 .req r2
-memctrl .req r3
-tmp1 .req r4
-tmp2 .req r5
-mode .req r6
-
-/*
- * 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
-
- .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
-
- mov tmp1, memctrl
- mov tmp2, tmp1, lsr#AT91_PM_MODE_OFFSET
- and mode, tmp2, #AT91_PM_MODE_MASK
-
- mov tmp1, memctrl
- and memctrl, tmp1, #AT91_PM_MEMCTRL_MASK
-
- cmp memctrl, #AT91_MEMCTRL_MC
- bne ddr_sr_enable
-
- /*
- * at91rm9200 Memory controller
- */
- /* Put SDRAM in self-refresh mode */
- mov tmp1, #1
- str tmp1, [sdramc, #AT91RM9200_SDRAMC_SRR]
- b sdr_sr_done
-
- /*
- * DDRSDR Memory controller
- */
-ddr_sr_enable:
- cmp memctrl, #AT91_MEMCTRL_DDRSDR
- bne sdr_sr_enable
-
- /* LPDDR1 --> force DDR2 mode during self-refresh */
- ldr tmp1, [sdramc, #AT91_DDRSDRC_MDR]
- str tmp1, .saved_sam9_mdr
- bic tmp1, tmp1, #~AT91_DDRSDRC_MD
- cmp tmp1, #AT91_DDRSDRC_MD_LOW_POWER_DDR
- ldreq tmp1, [sdramc, #AT91_DDRSDRC_MDR]
- biceq tmp1, tmp1, #AT91_DDRSDRC_MD
- orreq tmp1, tmp1, #AT91_DDRSDRC_MD_DDR2
- streq tmp1, [sdramc, #AT91_DDRSDRC_MDR]
-
- /* prepare for DDRAM self-refresh mode */
- ldr tmp1, [sdramc, #AT91_DDRSDRC_LPR]
- str tmp1, .saved_sam9_lpr
- bic tmp1, #AT91_DDRSDRC_LPCB
- orr tmp1, #AT91_DDRSDRC_LPCB_SELF_REFRESH
-
- /* figure out if we use the second ram controller */
- cmp ramc1, #0
- beq ddr_no_2nd_ctrl
-
- ldr tmp2, [ramc1, #AT91_DDRSDRC_MDR]
- str tmp2, .saved_sam9_mdr1
- bic tmp2, tmp2, #~AT91_DDRSDRC_MD
- cmp tmp2, #AT91_DDRSDRC_MD_LOW_POWER_DDR
- ldreq tmp2, [ramc1, #AT91_DDRSDRC_MDR]
- biceq tmp2, tmp2, #AT91_DDRSDRC_MD
- orreq tmp2, tmp2, #AT91_DDRSDRC_MD_DDR2
- streq tmp2, [ramc1, #AT91_DDRSDRC_MDR]
-
- ldr tmp2, [ramc1, #AT91_DDRSDRC_LPR]
- str tmp2, .saved_sam9_lpr1
- bic tmp2, #AT91_DDRSDRC_LPCB
- orr tmp2, #AT91_DDRSDRC_LPCB_SELF_REFRESH
-
- /* Enable DDRAM self-refresh mode */
- str tmp2, [ramc1, #AT91_DDRSDRC_LPR]
-ddr_no_2nd_ctrl:
- str tmp1, [sdramc, #AT91_DDRSDRC_LPR]
-
- b sdr_sr_done
-
- /*
- * SDRAMC Memory controller
- */
-sdr_sr_enable:
- /* Enable SDRAM self-refresh mode */
- ldr tmp1, [sdramc, #AT91_SDRAMC_LPR]
- str tmp1, .saved_sam9_lpr
-
- bic tmp1, #AT91_SDRAMC_LPCB
- orr tmp1, #AT91_SDRAMC_LPCB_SELF_REFRESH
- str tmp1, [sdramc, #AT91_SDRAMC_LPR]
-
-sdr_sr_done:
- tst mode, #AT91_PM_SLOW_CLOCK
- beq skip_disable_main_clock
-
- /* 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]
-
- /* Turn off the main oscillator */
- ldr tmp1, [pmc, #AT91_CKGR_MOR]
- bic tmp1, tmp1, #AT91_PMC_MOSCEN
- str tmp1, [pmc, #AT91_CKGR_MOR]
-
-skip_disable_main_clock:
- /* Wait for interrupt */
- mcr p15, 0, tmp1, c7, c0, 4
-
- tst mode, #AT91_PM_SLOW_CLOCK
- beq skip_enable_main_clock
-
- /* Turn on the main oscillator */
- ldr tmp1, [pmc, #AT91_CKGR_MOR]
- orr tmp1, tmp1, #AT91_PMC_MOSCEN
- str tmp1, [pmc, #AT91_CKGR_MOR]
-
- wait_moscrdy
-
- /* 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
- */
-2: ldr tmp1, .saved_mckr
- str tmp1, [pmc, #AT91_PMC_MCKR]
-
- wait_mckrdy
-
-skip_enable_main_clock:
- /*
- * at91rm9200 Memory controller
- * Do nothing - self-refresh is automatically disabled.
- */
- cmp memctrl, #AT91_MEMCTRL_MC
- beq ram_restored
-
- /*
- * DDRSDR Memory controller
- */
- cmp memctrl, #AT91_MEMCTRL_DDRSDR
- bne sdr_en_restore
- /* Restore MDR in case of LPDDR1 */
- ldr tmp1, .saved_sam9_mdr
- str tmp1, [sdramc, #AT91_DDRSDRC_MDR]
- /* Restore LPR on AT91 with DDRAM */
- ldr tmp1, .saved_sam9_lpr
- str tmp1, [sdramc, #AT91_DDRSDRC_LPR]
-
- /* if we use the second ram controller */
- cmp ramc1, #0
- ldrne tmp2, .saved_sam9_mdr1
- strne tmp2, [ramc1, #AT91_DDRSDRC_MDR]
- ldrne tmp2, .saved_sam9_lpr1
- strne tmp2, [ramc1, #AT91_DDRSDRC_LPR]
-
- b ram_restored
-
- /*
- * SDRAMC Memory controller
- */
-sdr_en_restore:
- /* Restore LPR on AT91 with SDRAM */
- ldr tmp1, .saved_sam9_lpr
- str tmp1, [sdramc, #AT91_SDRAMC_LPR]
-
-ram_restored:
- /* Restore registers, and return */
- ldmfd sp!, {r4 - r12, pc}
-
-
-.saved_mckr:
- .word 0
-
-.saved_pllar:
- .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..8edbad0
--- /dev/null
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -0,0 +1,281 @@
+/*
+ * 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"
+
+pmc .req r0
+sdramc .req r1
+ramc1 .req r2
+memctrl .req r3
+tmp1 .req r4
+tmp2 .req r5
+mode .req r6
+
+/*
+ * 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
+
+ .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
+
+ mov tmp1, memctrl
+ mov tmp2, tmp1, lsr#AT91_PM_MODE_OFFSET
+ and mode, tmp2, #AT91_PM_MODE_MASK
+
+ mov tmp1, memctrl
+ and memctrl, tmp1, #AT91_PM_MEMCTRL_MASK
+
+ cmp memctrl, #AT91_MEMCTRL_MC
+ bne ddr_sr_enable
+
+ /*
+ * at91rm9200 Memory controller
+ */
+ /* Put SDRAM in self-refresh mode */
+ mov tmp1, #1
+ str tmp1, [sdramc, #AT91RM9200_SDRAMC_SRR]
+ b sdr_sr_done
+
+ /*
+ * DDRSDR Memory controller
+ */
+ddr_sr_enable:
+ cmp memctrl, #AT91_MEMCTRL_DDRSDR
+ bne sdr_sr_enable
+
+ /* LPDDR1 --> force DDR2 mode during self-refresh */
+ ldr tmp1, [sdramc, #AT91_DDRSDRC_MDR]
+ str tmp1, .saved_sam9_mdr
+ bic tmp1, tmp1, #~AT91_DDRSDRC_MD
+ cmp tmp1, #AT91_DDRSDRC_MD_LOW_POWER_DDR
+ ldreq tmp1, [sdramc, #AT91_DDRSDRC_MDR]
+ biceq tmp1, tmp1, #AT91_DDRSDRC_MD
+ orreq tmp1, tmp1, #AT91_DDRSDRC_MD_DDR2
+ streq tmp1, [sdramc, #AT91_DDRSDRC_MDR]
+
+ /* prepare for DDRAM self-refresh mode */
+ ldr tmp1, [sdramc, #AT91_DDRSDRC_LPR]
+ str tmp1, .saved_sam9_lpr
+ bic tmp1, #AT91_DDRSDRC_LPCB
+ orr tmp1, #AT91_DDRSDRC_LPCB_SELF_REFRESH
+
+ /* figure out if we use the second ram controller */
+ cmp ramc1, #0
+ beq ddr_no_2nd_ctrl
+
+ ldr tmp2, [ramc1, #AT91_DDRSDRC_MDR]
+ str tmp2, .saved_sam9_mdr1
+ bic tmp2, tmp2, #~AT91_DDRSDRC_MD
+ cmp tmp2, #AT91_DDRSDRC_MD_LOW_POWER_DDR
+ ldreq tmp2, [ramc1, #AT91_DDRSDRC_MDR]
+ biceq tmp2, tmp2, #AT91_DDRSDRC_MD
+ orreq tmp2, tmp2, #AT91_DDRSDRC_MD_DDR2
+ streq tmp2, [ramc1, #AT91_DDRSDRC_MDR]
+
+ ldr tmp2, [ramc1, #AT91_DDRSDRC_LPR]
+ str tmp2, .saved_sam9_lpr1
+ bic tmp2, #AT91_DDRSDRC_LPCB
+ orr tmp2, #AT91_DDRSDRC_LPCB_SELF_REFRESH
+
+ /* Enable DDRAM self-refresh mode */
+ str tmp2, [ramc1, #AT91_DDRSDRC_LPR]
+ddr_no_2nd_ctrl:
+ str tmp1, [sdramc, #AT91_DDRSDRC_LPR]
+
+ b sdr_sr_done
+
+ /*
+ * SDRAMC Memory controller
+ */
+sdr_sr_enable:
+ /* Enable SDRAM self-refresh mode */
+ ldr tmp1, [sdramc, #AT91_SDRAMC_LPR]
+ str tmp1, .saved_sam9_lpr
+
+ bic tmp1, #AT91_SDRAMC_LPCB
+ orr tmp1, #AT91_SDRAMC_LPCB_SELF_REFRESH
+ str tmp1, [sdramc, #AT91_SDRAMC_LPR]
+
+sdr_sr_done:
+ tst mode, #AT91_PM_SLOW_CLOCK
+ beq skip_disable_main_clock
+
+ /* 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]
+
+ /* Turn off the main oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ bic tmp1, tmp1, #AT91_PMC_MOSCEN
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+skip_disable_main_clock:
+ /* Wait for interrupt */
+ mcr p15, 0, tmp1, c7, c0, 4
+
+ tst mode, #AT91_PM_SLOW_CLOCK
+ beq skip_enable_main_clock
+
+ /* Turn on the main oscillator */
+ ldr tmp1, [pmc, #AT91_CKGR_MOR]
+ orr tmp1, tmp1, #AT91_PMC_MOSCEN
+ str tmp1, [pmc, #AT91_CKGR_MOR]
+
+ wait_moscrdy
+
+ /* 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
+ */
+2: ldr tmp1, .saved_mckr
+ str tmp1, [pmc, #AT91_PMC_MCKR]
+
+ wait_mckrdy
+
+skip_enable_main_clock:
+ /*
+ * at91rm9200 Memory controller
+ * Do nothing - self-refresh is automatically disabled.
+ */
+ cmp memctrl, #AT91_MEMCTRL_MC
+ beq ram_restored
+
+ /*
+ * DDRSDR Memory controller
+ */
+ cmp memctrl, #AT91_MEMCTRL_DDRSDR
+ bne sdr_en_restore
+ /* Restore MDR in case of LPDDR1 */
+ ldr tmp1, .saved_sam9_mdr
+ str tmp1, [sdramc, #AT91_DDRSDRC_MDR]
+ /* Restore LPR on AT91 with DDRAM */
+ ldr tmp1, .saved_sam9_lpr
+ str tmp1, [sdramc, #AT91_DDRSDRC_LPR]
+
+ /* if we use the second ram controller */
+ cmp ramc1, #0
+ ldrne tmp2, .saved_sam9_mdr1
+ strne tmp2, [ramc1, #AT91_DDRSDRC_MDR]
+ ldrne tmp2, .saved_sam9_lpr1
+ strne tmp2, [ramc1, #AT91_DDRSDRC_LPR]
+
+ b ram_restored
+
+ /*
+ * SDRAMC Memory controller
+ */
+sdr_en_restore:
+ /* Restore LPR on AT91 with SDRAM */
+ ldr tmp1, .saved_sam9_lpr
+ str tmp1, [sdramc, #AT91_SDRAMC_LPR]
+
+ram_restored:
+ /* Restore registers, and return */
+ ldmfd sp!, {r4 - r12, pc}
+
+
+.saved_mckr:
+ .word 0
+
+.saved_pllar:
+ .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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