[PATCH 3/3] ARM: S5P64X0: Add Power Management support
Abhilash Kesavan
a.kesavan at samsung.com
Tue Sep 27 16:22:44 EDT 2011
Add suspend-to-ram support for SMDK6440/50
Signed-off-by: Abhilash Kesavan <a.kesavan at samsung.com>
---
arch/arm/Kconfig | 2 +-
arch/arm/mach-s5p64x0/Kconfig | 4 +
arch/arm/mach-s5p64x0/Makefile | 1 +
arch/arm/mach-s5p64x0/include/mach/map.h | 1 +
arch/arm/mach-s5p64x0/include/mach/pm-core.h | 117 +++++++++++++
arch/arm/mach-s5p64x0/include/mach/regs-clock.h | 33 ++++
arch/arm/mach-s5p64x0/include/mach/regs-gpio.h | 19 ++
arch/arm/mach-s5p64x0/irq-eint.c | 2 +
arch/arm/mach-s5p64x0/irq-pm.c | 92 ++++++++++
arch/arm/mach-s5p64x0/pm.c | 204 +++++++++++++++++++++++
10 files changed, 474 insertions(+), 1 deletions(-)
create mode 100644 arch/arm/mach-s5p64x0/include/mach/pm-core.h
create mode 100644 arch/arm/mach-s5p64x0/irq-pm.c
create mode 100644 arch/arm/mach-s5p64x0/pm.c
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 42401da..4d61466 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -2079,7 +2079,7 @@ menu "Power management options"
source "kernel/power/Kconfig"
config ARCH_SUSPEND_POSSIBLE
- depends on !ARCH_S5P64X0 && !ARCH_S5PC100
+ depends on !ARCH_S5PC100
depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
def_bool y
diff --git a/arch/arm/mach-s5p64x0/Kconfig b/arch/arm/mach-s5p64x0/Kconfig
index 9527ed2..15cea9c 100644
--- a/arch/arm/mach-s5p64x0/Kconfig
+++ b/arch/arm/mach-s5p64x0/Kconfig
@@ -11,6 +11,8 @@ config CPU_S5P6440
bool
select SAMSUNG_DMADEV
select S5P_HRT
+ select S5P_SLEEP if PM
+ select SAMSUNG_WAKEMASK if PM
help
Enable S5P6440 CPU support
@@ -18,6 +20,8 @@ config CPU_S5P6450
bool
select SAMSUNG_DMADEV
select S5P_HRT
+ select S5P_SLEEP if PM
+ select SAMSUNG_WAKEMASK if PM
help
Enable S5P6450 CPU support
diff --git a/arch/arm/mach-s5p64x0/Makefile b/arch/arm/mach-s5p64x0/Makefile
index 5b94955..f4bafbb 100644
--- a/arch/arm/mach-s5p64x0/Makefile
+++ b/arch/arm/mach-s5p64x0/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_ARCH_S5P64X0) += cpu.o init.o clock.o dma.o
obj-$(CONFIG_ARCH_S5P64X0) += setup-i2c0.o irq-eint.o
obj-$(CONFIG_CPU_S5P6440) += clock-s5p6440.o
obj-$(CONFIG_CPU_S5P6450) += clock-s5p6450.o
+obj-$(CONFIG_PM) += pm.o irq-pm.o
# machine support
diff --git a/arch/arm/mach-s5p64x0/include/mach/map.h b/arch/arm/mach-s5p64x0/include/mach/map.h
index 95c9125..6138f7c 100644
--- a/arch/arm/mach-s5p64x0/include/mach/map.h
+++ b/arch/arm/mach-s5p64x0/include/mach/map.h
@@ -85,5 +85,6 @@
#define S5P_PA_UART5 S5P6450_PA_UART(5)
#define S5P_SZ_UART SZ_256
+#define S3C_VA_UARTx(x) (S3C_VA_UART + ((x) * S3C_UART_OFFSET))
#endif /* __ASM_ARCH_MAP_H */
diff --git a/arch/arm/mach-s5p64x0/include/mach/pm-core.h b/arch/arm/mach-s5p64x0/include/mach/pm-core.h
new file mode 100644
index 0000000..e52f754
--- /dev/null
+++ b/arch/arm/mach-s5p64x0/include/mach/pm-core.h
@@ -0,0 +1,117 @@
+/* linux/arch/arm/mach-s5p64x0/include/mach/pm-core.h
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * S5P64X0 - PM core support for arch/arm/plat-samsung/pm.c
+ *
+ * Based on PM core support for S3C64XX by Ben Dooks
+ *
+ * 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 <mach/regs-gpio.h>
+
+static inline void s3c_pm_debug_init_uart(void)
+{
+ u32 tmp = __raw_readl(S5P64X0_CLK_GATE_PCLK);
+
+ /*
+ * As a note, since the S5P64X0 UARTs generally have multiple
+ * clock sources, we simply enable PCLK at the moment and hope
+ * that the resume settings for the UART are suitable for the
+ * use with PCLK.
+ */
+ tmp |= S5P64X0_CLK_GATE_PCLK_UART0;
+ tmp |= S5P64X0_CLK_GATE_PCLK_UART1;
+ tmp |= S5P64X0_CLK_GATE_PCLK_UART2;
+ tmp |= S5P64X0_CLK_GATE_PCLK_UART3;
+
+ __raw_writel(tmp, S5P64X0_CLK_GATE_PCLK);
+ udelay(10);
+}
+
+static inline void s3c_pm_arch_prepare_irqs(void)
+{
+ /* VIC should have already been taken care of */
+
+ /* clear any pending EINT0 interrupts */
+ __raw_writel(__raw_readl(S5P64X0_EINT0PEND), S5P64X0_EINT0PEND);
+}
+
+static inline void s3c_pm_arch_stop_clocks(void) { }
+static inline void s3c_pm_arch_show_resume_irqs(void) { }
+
+/*
+ * make these defines, we currently do not have any need to change
+ * the IRQ wake controls depending on the CPU we are running on
+ */
+#define s3c_irqwake_eintallow ((1 << 16) - 1)
+#define s3c_irqwake_intallow (~0)
+
+static inline void s3c_pm_arch_update_uart(void __iomem *regs,
+ struct pm_uart_save *save)
+{
+ u32 ucon = __raw_readl(regs + S3C2410_UCON);
+ u32 ucon_clk = ucon & S3C6400_UCON_CLKMASK;
+ u32 save_clk = save->ucon & S3C6400_UCON_CLKMASK;
+ u32 new_ucon;
+ u32 delta;
+
+ /*
+ * S5P64X0 UART blocks only support level interrupts, so ensure that
+ * when we restore unused UART blocks we force the level interrupt
+ * settings.
+ */
+ save->ucon |= S3C2410_UCON_TXILEVEL | S3C2410_UCON_RXILEVEL;
+
+ /*
+ * We have a constraint on changing the clock type of the UART
+ * between UCLKx and PCLK, so ensure that when we restore UCON
+ * that the CLK field is correctly modified if the bootloader
+ * has changed anything.
+ */
+ if (ucon_clk != save_clk) {
+ new_ucon = save->ucon;
+ delta = ucon_clk ^ save_clk;
+
+ /*
+ * change from UCLKx => wrong PCLK,
+ * either UCLK can be tested for by a bit-test
+ * with UCLK0
+ */
+ if (ucon_clk & S3C6400_UCON_UCLK0 &&
+ !(save_clk & S3C6400_UCON_UCLK0) &&
+ delta & S3C6400_UCON_PCLK2) {
+ new_ucon &= ~S3C6400_UCON_UCLK0;
+ } else if (delta == S3C6400_UCON_PCLK2) {
+ /*
+ * as a precaution, don't change from
+ * PCLK2 => PCLK or vice-versa
+ */
+ new_ucon ^= S3C6400_UCON_PCLK2;
+ }
+
+ S3C_PMDBG("ucon change %04x => %04x (save=%04x)\n",
+ ucon, new_ucon, save->ucon);
+ save->ucon = new_ucon;
+ }
+}
+
+static inline void s3c_pm_restored_gpios(void)
+{
+ /* ensure sleep mode has been cleared from the system */
+ __raw_writel(0, S5P64X0_SLPEN);
+}
+
+static inline void samsung_pm_saved_gpios(void)
+{
+ /*
+ * turn on the sleep mode and keep it there, as it seems that during
+ * suspend the xCON registers get re-set and thus you can end up with
+ * problems between going to sleep and resuming.
+ */
+ __raw_writel(S5P64X0_SLPEN_USE_xSLP, S5P64X0_SLPEN);
+}
diff --git a/arch/arm/mach-s5p64x0/include/mach/regs-clock.h b/arch/arm/mach-s5p64x0/include/mach/regs-clock.h
index a133f22..bd91112 100644
--- a/arch/arm/mach-s5p64x0/include/mach/regs-clock.h
+++ b/arch/arm/mach-s5p64x0/include/mach/regs-clock.h
@@ -41,17 +41,50 @@
#define S5P6450_DPLL_CON S5P_CLKREG(0x50)
#define S5P6450_DPLL_CON_K S5P_CLKREG(0x54)
+#define S5P64X0_AHB_CON0 S5P_CLKREG(0x100)
#define S5P64X0_CLK_SRC1 S5P_CLKREG(0x10C)
#define S5P64X0_SYS_ID S5P_CLKREG(0x118)
#define S5P64X0_SYS_OTHERS S5P_CLKREG(0x11C)
#define S5P64X0_PWR_CFG S5P_CLKREG(0x804)
+#define S5P64X0_EINT_WAKEUP_MASK S5P_CLKREG(0x808)
+#define S5P64X0_SLEEP_CFG S5P_CLKREG(0x818)
+#define S5P64X0_PWR_STABLE S5P_CLKREG(0x828)
+
#define S5P64X0_OTHERS S5P_CLKREG(0x900)
+#define S5P64X0_WAKEUP_STAT S5P_CLKREG(0x908)
+
+#define S5P64X0_INFORM0 S5P_CLKREG(0xA00)
#define S5P64X0_CLKDIV0_HCLK_SHIFT (8)
#define S5P64X0_CLKDIV0_HCLK_MASK (0xF << S5P64X0_CLKDIV0_HCLK_SHIFT)
+/* HCLK GATE Registers */
+#define S5P64X0_CLK_GATE_HCLK1_FIMGVG (1 << 2)
+#define S5P64X0_CLK_GATE_SCLK1_FIMGVG (1 << 2)
+
+/* PCLK GATE Registers */
+#define S5P64X0_CLK_GATE_PCLK_UART3 (1 << 4)
+#define S5P64X0_CLK_GATE_PCLK_UART2 (1 << 3)
+#define S5P64X0_CLK_GATE_PCLK_UART1 (1 << 2)
+#define S5P64X0_CLK_GATE_PCLK_UART0 (1 << 1)
+
+#define S5P64X0_PWR_CFG_MMC1_DISABLE (1 << 15)
+#define S5P64X0_PWR_CFG_MMC0_DISABLE (1 << 14)
+#define S5P64X0_PWR_CFG_RTC_TICK_DISABLE (1 << 11)
+#define S5P64X0_PWR_CFG_RTC_ALRM_DISABLE (1 << 10)
+#define S5P64X0_PWR_CFG_WFI_MASK (3 << 5)
+#define S5P64X0_PWR_CFG_WFI_SLEEP (3 << 5)
+
+#define S5P64X0_SLEEP_CFG_OSC_EN (1 << 0)
+
+#define S5P64X0_PWR_STABLE_PWR_CNT_VAL4 (4 << 0)
+
+#define S5P6450_OTHERS_DISABLE_INT (1 << 31)
+#define S5P64X0_OTHERS_RET_UART (1 << 26)
+#define S5P64X0_OTHERS_RET_MMC1 (1 << 25)
+#define S5P64X0_OTHERS_RET_MMC0 (1 << 24)
#define S5P64X0_OTHERS_USB_SIG_MASK (1 << 16)
/* Compatibility defines */
diff --git a/arch/arm/mach-s5p64x0/include/mach/regs-gpio.h b/arch/arm/mach-s5p64x0/include/mach/regs-gpio.h
index 6ce2547..27a2230 100644
--- a/arch/arm/mach-s5p64x0/include/mach/regs-gpio.h
+++ b/arch/arm/mach-s5p64x0/include/mach/regs-gpio.h
@@ -34,14 +34,33 @@
#define S5P6450_GPQ_BASE (S5P_VA_GPIO + 0x0180)
#define S5P6450_GPS_BASE (S5P_VA_GPIO + 0x0300)
+#define S5P64X0_SPCON0 (S5P_VA_GPIO + 0x1A0)
+#define S5P64X0_SPCON1 (S5P_VA_GPIO + 0x2B0)
+
+#define S5P64X0_MEM0CONSLP0 (S5P_VA_GPIO + 0x1C0)
+#define S5P64X0_MEM0CONSLP1 (S5P_VA_GPIO + 0x1C4)
+#define S5P64X0_MEM0DRVCON (S5P_VA_GPIO + 0x1D0)
+#define S5P64X0_MEM1DRVCON (S5P_VA_GPIO + 0x1D4)
+
+#define S5P64X0_EINT12CON (S5P_VA_GPIO + 0x200)
+#define S5P64X0_EINT12FLTCON (S5P_VA_GPIO + 0x220)
+#define S5P64X0_EINT12MASK (S5P_VA_GPIO + 0x240)
+
/* External interrupt control registers for group0 */
#define EINT0CON0_OFFSET (0x900)
+#define EINT0FLTCON0_OFFSET (0x910)
+#define EINT0FLTCON1_OFFSET (0x914)
#define EINT0MASK_OFFSET (0x920)
#define EINT0PEND_OFFSET (0x924)
#define S5P64X0_EINT0CON0 (S5P_VA_GPIO + EINT0CON0_OFFSET)
+#define S5P64X0_EINT0FLTCON0 (S5P_VA_GPIO + EINT0FLTCON0_OFFSET)
+#define S5P64X0_EINT0FLTCON1 (S5P_VA_GPIO + EINT0FLTCON1_OFFSET)
#define S5P64X0_EINT0MASK (S5P_VA_GPIO + EINT0MASK_OFFSET)
#define S5P64X0_EINT0PEND (S5P_VA_GPIO + EINT0PEND_OFFSET)
+#define S5P64X0_SLPEN (S5P_VA_GPIO + 0x930)
+#define S5P64X0_SLPEN_USE_xSLP (1 << 0)
+
#endif /* __ASM_ARCH_REGS_GPIO_H */
diff --git a/arch/arm/mach-s5p64x0/irq-eint.c b/arch/arm/mach-s5p64x0/irq-eint.c
index 494e1a8..275dc74 100644
--- a/arch/arm/mach-s5p64x0/irq-eint.c
+++ b/arch/arm/mach-s5p64x0/irq-eint.c
@@ -20,6 +20,7 @@
#include <plat/cpu.h>
#include <plat/regs-irqtype.h>
#include <plat/gpio-cfg.h>
+#include <plat/pm.h>
#include <mach/regs-gpio.h>
#include <mach/regs-clock.h>
@@ -134,6 +135,7 @@ static int s5p64x0_alloc_gc(void)
ct->chip.irq_mask = irq_gc_mask_set_bit;
ct->chip.irq_unmask = irq_gc_mask_clr_bit;
ct->chip.irq_set_type = s5p64x0_irq_eint_set_type;
+ ct->chip.irq_set_wake = s3c_irqext_wake;
ct->regs.ack = EINT0PEND_OFFSET;
ct->regs.mask = EINT0MASK_OFFSET;
irq_setup_generic_chip(gc, IRQ_MSK(16), IRQ_GC_INIT_MASK_CACHE,
diff --git a/arch/arm/mach-s5p64x0/irq-pm.c b/arch/arm/mach-s5p64x0/irq-pm.c
new file mode 100644
index 0000000..3e6f245
--- /dev/null
+++ b/arch/arm/mach-s5p64x0/irq-pm.c
@@ -0,0 +1,92 @@
+/* linux/arch/arm/mach-s5p64x0/irq-pm.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * S5P64X0 - Interrupt handling Power Management
+ *
+ * Based on arch/arm/mach-s3c64xx/irq-pm.c by Ben Dooks
+ *
+ * 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/syscore_ops.h>
+#include <linux/serial_core.h>
+#include <linux/io.h>
+
+#include <plat/regs-serial.h>
+#include <plat/pm.h>
+
+#include <mach/regs-gpio.h>
+
+static struct sleep_save irq_save[] = {
+ SAVE_ITEM(S5P64X0_EINT0CON0),
+ SAVE_ITEM(S5P64X0_EINT0FLTCON0),
+ SAVE_ITEM(S5P64X0_EINT0FLTCON1),
+ SAVE_ITEM(S5P64X0_EINT0MASK),
+};
+
+static struct irq_grp_save {
+ u32 con;
+ u32 fltcon;
+ u32 mask;
+} eint_grp_save[4];
+
+static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS];
+
+static int s5p64x0_irq_pm_suspend(void)
+{
+ struct irq_grp_save *grp = eint_grp_save;
+ int i;
+
+ S3C_PMDBG("%s: suspending IRQs\n", __func__);
+
+ s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
+
+ for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
+ irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);
+
+ for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
+ grp->con = __raw_readl(S5P64X0_EINT12CON + (i * 4));
+ grp->mask = __raw_readl(S5P64X0_EINT12MASK + (i * 4));
+ grp->fltcon = __raw_readl(S5P64X0_EINT12FLTCON + (i * 4));
+ }
+
+ return 0;
+}
+
+static void s5p64x0_irq_pm_resume(void)
+{
+ struct irq_grp_save *grp = eint_grp_save;
+ int i;
+
+ S3C_PMDBG("%s: resuming IRQs\n", __func__);
+
+ s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
+
+ for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
+ __raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);
+
+ for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
+ __raw_writel(grp->con, S5P64X0_EINT12CON + (i * 4));
+ __raw_writel(grp->mask, S5P64X0_EINT12MASK + (i * 4));
+ __raw_writel(grp->fltcon, S5P64X0_EINT12FLTCON + (i * 4));
+ }
+
+ S3C_PMDBG("%s: IRQ configuration restored\n", __func__);
+}
+
+static struct syscore_ops s5p64x0_irq_syscore_ops = {
+ .suspend = s5p64x0_irq_pm_suspend,
+ .resume = s5p64x0_irq_pm_resume,
+};
+
+static int __init s5p64x0_syscore_init(void)
+{
+ register_syscore_ops(&s5p64x0_irq_syscore_ops);
+
+ return 0;
+}
+core_initcall(s5p64x0_syscore_init);
diff --git a/arch/arm/mach-s5p64x0/pm.c b/arch/arm/mach-s5p64x0/pm.c
new file mode 100644
index 0000000..6992724
--- /dev/null
+++ b/arch/arm/mach-s5p64x0/pm.c
@@ -0,0 +1,204 @@
+/* linux/arch/arm/mach-s5p64x0/pm.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * S5P64X0 Power Management Support
+ *
+ * Based on arch/arm/mach-s3c64xx/pm.c by Ben Dooks
+ *
+ * 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/suspend.h>
+#include <linux/syscore_ops.h>
+#include <linux/io.h>
+
+#include <plat/cpu.h>
+#include <plat/pm.h>
+#include <plat/regs-timer.h>
+#include <plat/wakeup-mask.h>
+
+#include <mach/regs-clock.h>
+#include <mach/regs-gpio.h>
+
+static struct sleep_save s5p64x0_core_save[] = {
+ SAVE_ITEM(S5P64X0_APLL_CON),
+ SAVE_ITEM(S5P64X0_MPLL_CON),
+ SAVE_ITEM(S5P64X0_EPLL_CON),
+ SAVE_ITEM(S5P64X0_EPLL_CON_K),
+ SAVE_ITEM(S5P64X0_CLK_SRC0),
+ SAVE_ITEM(S5P64X0_CLK_SRC1),
+ SAVE_ITEM(S5P64X0_CLK_DIV0),
+ SAVE_ITEM(S5P64X0_CLK_DIV1),
+ SAVE_ITEM(S5P64X0_CLK_DIV2),
+ SAVE_ITEM(S5P64X0_CLK_DIV3),
+ SAVE_ITEM(S5P64X0_CLK_GATE_MEM0),
+ SAVE_ITEM(S5P64X0_CLK_GATE_HCLK1),
+ SAVE_ITEM(S5P64X0_CLK_GATE_SCLK1),
+};
+
+static struct sleep_save s5p64x0_misc_save[] = {
+ SAVE_ITEM(S5P64X0_AHB_CON0),
+ SAVE_ITEM(S5P64X0_SPCON0),
+ SAVE_ITEM(S5P64X0_SPCON1),
+ SAVE_ITEM(S5P64X0_MEM0CONSLP0),
+ SAVE_ITEM(S5P64X0_MEM0CONSLP1),
+ SAVE_ITEM(S5P64X0_MEM0DRVCON),
+ SAVE_ITEM(S5P64X0_MEM1DRVCON),
+
+ SAVE_ITEM(S3C64XX_TINT_CSTAT),
+};
+
+/* DPLL is present only in S5P6450 */
+static struct sleep_save s5p6450_core_save[] = {
+ SAVE_ITEM(S5P6450_DPLL_CON),
+ SAVE_ITEM(S5P6450_DPLL_CON_K),
+};
+
+void s3c_pm_configure_extint(void)
+{
+ __raw_writel(s3c_irqwake_eintmask, S5P64X0_EINT_WAKEUP_MASK);
+}
+
+void s3c_pm_restore_core(void)
+{
+ __raw_writel(0, S5P64X0_EINT_WAKEUP_MASK);
+
+ s3c_pm_do_restore_core(s5p64x0_core_save,
+ ARRAY_SIZE(s5p64x0_core_save));
+
+ if (soc_is_s5p6450())
+ s3c_pm_do_restore_core(s5p6450_core_save,
+ ARRAY_SIZE(s5p6450_core_save));
+
+ s3c_pm_do_restore(s5p64x0_misc_save, ARRAY_SIZE(s5p64x0_misc_save));
+}
+
+void s3c_pm_save_core(void)
+{
+ s3c_pm_do_save(s5p64x0_misc_save, ARRAY_SIZE(s5p64x0_misc_save));
+
+ if (soc_is_s5p6450())
+ s3c_pm_do_save(s5p6450_core_save,
+ ARRAY_SIZE(s5p6450_core_save));
+
+ s3c_pm_do_save(s5p64x0_core_save, ARRAY_SIZE(s5p64x0_core_save));
+}
+
+static int s5p64x0_cpu_suspend(unsigned long arg)
+{
+ unsigned long tmp = 0;
+
+ /*
+ * Issue the standby signal into the pm unit. Note, we
+ * issue a write-buffer drain just in case.
+ */
+ asm("b 1f\n\t"
+ ".align 5\n\t"
+ "1:\n\t"
+ "mcr p15, 0, %0, c7, c10, 5\n\t"
+ "mcr p15, 0, %0, c7, c10, 4\n\t"
+ "mcr p15, 0, %0, c7, c0, 4" : : "r" (tmp));
+
+ /* we should never get past here */
+ panic("sleep resumed to originator?");
+}
+
+/* mapping of interrupts to parts of the wakeup mask */
+static struct samsung_wakeup_mask s5p64x0_wake_irqs[] = {
+ { .irq = IRQ_RTC_ALARM, .bit = S5P64X0_PWR_CFG_RTC_ALRM_DISABLE, },
+ { .irq = IRQ_RTC_TIC, .bit = S5P64X0_PWR_CFG_RTC_TICK_DISABLE, },
+ { .irq = IRQ_HSMMC0, .bit = S5P64X0_PWR_CFG_MMC0_DISABLE, },
+ { .irq = IRQ_HSMMC1, .bit = S5P64X0_PWR_CFG_MMC1_DISABLE, },
+};
+
+static void s5p64x0_pm_prepare(void)
+{
+ u32 tmp;
+
+ samsung_sync_wakemask(S5P64X0_PWR_CFG,
+ s5p64x0_wake_irqs, ARRAY_SIZE(s5p64x0_wake_irqs));
+
+ /* store the resume address in INFORM0 register */
+ __raw_writel(virt_to_phys(s3c_cpu_resume), S5P64X0_INFORM0);
+
+ /* setup clock gating for FIMGVG block */
+ __raw_writel((__raw_readl(S5P64X0_CLK_GATE_HCLK1) | \
+ (S5P64X0_CLK_GATE_HCLK1_FIMGVG)), S5P64X0_CLK_GATE_HCLK1);
+ __raw_writel((__raw_readl(S5P64X0_CLK_GATE_SCLK1) | \
+ (S5P64X0_CLK_GATE_SCLK1_FIMGVG)), S5P64X0_CLK_GATE_SCLK1);
+
+ /* Configure the stabilization counter with wait time required */
+ __raw_writel(S5P64X0_PWR_STABLE_PWR_CNT_VAL4, S5P64X0_PWR_STABLE);
+
+ /* set WFI to SLEEP mode configuration */
+ tmp = __raw_readl(S5P64X0_SLEEP_CFG);
+ tmp &= ~(S5P64X0_SLEEP_CFG_OSC_EN);
+ __raw_writel(tmp, S5P64X0_SLEEP_CFG);
+
+ tmp = __raw_readl(S5P64X0_PWR_CFG);
+ tmp &= ~(S5P64X0_PWR_CFG_WFI_MASK);
+ tmp |= S5P64X0_PWR_CFG_WFI_SLEEP;
+ __raw_writel(tmp, S5P64X0_PWR_CFG);
+
+ /*
+ * set OTHERS register to disable interrupt before going to
+ * sleep. This bit is present only in S5P6450, it is reserved
+ * in S5P6440.
+ */
+ if (soc_is_s5p6450()) {
+ tmp = __raw_readl(S5P64X0_OTHERS);
+ tmp |= S5P6450_OTHERS_DISABLE_INT;
+ __raw_writel(tmp, S5P64X0_OTHERS);
+ }
+
+ /* ensure previous wakeup state is cleared before sleeping */
+ __raw_writel(__raw_readl(S5P64X0_WAKEUP_STAT), S5P64X0_WAKEUP_STAT);
+
+}
+
+static int s5p64x0_pm_add(struct sys_device *sysdev)
+{
+ pm_cpu_prep = s5p64x0_pm_prepare;
+ pm_cpu_sleep = s5p64x0_cpu_suspend;
+ pm_uart_udivslot = 1;
+
+ return 0;
+}
+
+static struct sysdev_driver s5p64x0_pm_driver = {
+ .add = s5p64x0_pm_add,
+};
+
+static __init int s5p64x0_pm_drvinit(void)
+{
+ s3c_pm_init();
+
+ return sysdev_driver_register(&s5p64x0_sysclass, &s5p64x0_pm_driver);
+}
+arch_initcall(s5p64x0_pm_drvinit);
+
+static void s5p64x0_pm_resume(void)
+{
+ u32 tmp;
+
+ tmp = __raw_readl(S5P64X0_OTHERS);
+ tmp |= (S5P64X0_OTHERS_RET_MMC0 | S5P64X0_OTHERS_RET_MMC1 | \
+ S5P64X0_OTHERS_RET_UART);
+ __raw_writel(tmp , S5P64X0_OTHERS);
+}
+
+static struct syscore_ops s5p64x0_pm_syscore_ops = {
+ .resume = s5p64x0_pm_resume,
+};
+
+static __init int s5p64x0_pm_syscore_init(void)
+{
+ register_syscore_ops(&s5p64x0_pm_syscore_ops);
+
+ return 0;
+}
+arch_initcall(s5p64x0_pm_syscore_init);
--
1.7.0.4
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