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-rw-r--r--arch/arm/mach-imx/Makefile3
-rw-r--r--arch/arm/mach-imx/common.h10
-rw-r--r--arch/arm/mach-imx/mach-vf610.c8
-rw-r--r--arch/arm/mach-imx/pm-vf610.c704
-rw-r--r--arch/arm/mach-imx/suspend-vf610.S448
5 files changed, 1173 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 2d78900ee282..438cd1a06945 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -90,12 +90,15 @@ ifeq ($(CONFIG_SUSPEND),y)
AFLAGS_suspend-imx6.o :=-Wa,-march=armv7-a
obj-$(CONFIG_SOC_IMX6) += suspend-imx6.o
obj-$(CONFIG_SOC_IMX53) += suspend-imx53.o
+AFLAGS_suspend-vf610.o :=-Wa,-march=armv7-a
+obj-$(CONFIG_SOC_VF610) += suspend-vf610.o
endif
ifeq ($(CONFIG_ARM_CPU_SUSPEND),y)
AFLAGS_resume-imx6.o :=-Wa,-march=armv7-a
obj-$(CONFIG_SOC_IMX6) += resume-imx6.o
endif
obj-$(CONFIG_SOC_IMX6) += pm-imx6.o
+obj-$(CONFIG_SOC_VF610) += pm-vf610.o
obj-$(CONFIG_SOC_IMX50) += mach-imx50.o
obj-$(CONFIG_SOC_IMX51) += mach-imx51.o
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index 288f57222745..91d22f3a4dbe 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -75,6 +75,13 @@ enum mxc_cpu_pwr_mode {
STOP_POWER_OFF, /* STOP + SRPG */
};
+enum vf610_cpu_pwr_mode {
+ VF610_RUN,
+ VF610_LP_RUN,
+ VF610_STOP,
+ VF610_LP_STOP,
+};
+
enum mx3_cpu_pwr_mode {
MX3_RUN,
MX3_WAIT,
@@ -118,10 +125,12 @@ int imx_cpu_kill(unsigned int cpu);
void imx53_suspend(void __iomem *ocram_vbase);
extern const u32 imx53_suspend_sz;
void imx6_suspend(void __iomem *ocram_vbase);
+void vf610_suspend(void __iomem *ocram_vbase);
#else
static inline void imx53_suspend(void __iomem *ocram_vbase) {}
static const u32 imx53_suspend_sz;
static inline void imx6_suspend(void __iomem *ocram_vbase) {}
+static inline void vf610_suspend(void __iomem *ocram_vbase) {}
#endif
void v7_cpu_resume(void);
@@ -132,6 +141,7 @@ void imx6dl_pm_init(void);
void imx6sl_pm_init(void);
void imx6sx_pm_init(void);
void imx6ul_pm_init(void);
+void vf610_pm_init(void);
#ifdef CONFIG_PM
void imx51_pm_init(void);
diff --git a/arch/arm/mach-imx/mach-vf610.c b/arch/arm/mach-imx/mach-vf610.c
index b20f6c14eda5..5ba668feea65 100644
--- a/arch/arm/mach-imx/mach-vf610.c
+++ b/arch/arm/mach-imx/mach-vf610.c
@@ -11,6 +11,13 @@
#include <linux/irqchip.h>
#include <asm/mach/arch.h>
#include <asm/hardware/cache-l2x0.h>
+#include "common.h"
+
+static void __init vf610_init_machine(void)
+{
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+ vf610_pm_init();
+}
static const char * const vf610_dt_compat[] __initconst = {
"fsl,vf500",
@@ -24,5 +31,6 @@ static const char * const vf610_dt_compat[] __initconst = {
DT_MACHINE_START(VYBRID_VF610, "Freescale Vybrid VF5xx/VF6xx (Device Tree)")
.l2c_aux_val = 0,
.l2c_aux_mask = ~0,
+ .init_machine = vf610_init_machine,
.dt_compat = vf610_dt_compat,
MACHINE_END
diff --git a/arch/arm/mach-imx/pm-vf610.c b/arch/arm/mach-imx/pm-vf610.c
new file mode 100644
index 000000000000..5a3df0caf23a
--- /dev/null
+++ b/arch/arm/mach-imx/pm-vf610.c
@@ -0,0 +1,704 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright 2014 Toradex AG
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#ifdef DEBUG
+#define pr_pmdebug(fmt, ...) pr_info("PM: VF610: " fmt "\n", ##__VA_ARGS__)
+#else
+#define pr_pmdebug(fmt, ...)
+#endif
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/genalloc.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/suspend.h>
+#include <linux/clk.h>
+#include <asm/cacheflush.h>
+#include <asm/fncpy.h>
+#include <asm/proc-fns.h>
+#include <asm/suspend.h>
+#include <asm/tlb.h>
+
+#include "common.h"
+
+#define DDRMC_PHY_OFFSET 0x400
+
+#define CCR 0x0
+#define BM_CCR_FIRC_EN (0x1 << 16)
+#define BM_CCR_FXOSC_EN (0x1 << 12)
+
+#define CCSR 0x8
+#define BM_CCSR_DDRC_CLK_SEL (0x1 << 6)
+#define BM_CCSR_FAST_CLK_SEL (0x1 << 5)
+#define BM_CCSR_SLOW_CLK_SEL (0x1 << 4)
+#define BM_CCSR_SYS_CLK_SEL_MASK (0x7 << 0)
+
+#define CACRR 0xc
+
+#define CLPCR 0x2c
+#define BM_CLPCR_ARM_CLK_DIS_ON_LPM (0x1 << 5)
+#define BM_CLPCR_SBYOS (0x1 << 6)
+#define BM_CLPCR_DIS_REF_OSC (0x1 << 7)
+#define BM_CLPCR_ANADIG_STOP_MODE (0x1 << 8)
+#define BM_CLPCR_FXOSC_BYPSEN (0x1 << 10)
+#define BM_CLPCR_FXOSC_PWRDWN (0x1 << 11)
+#define BM_CLPCR_MASK_CORE0_WFI (0x1 << 22)
+#define BM_CLPCR_MASK_CORE1_WFI (0x1 << 23)
+#define BM_CLPCR_MASK_SCU_IDLE (0x1 << 24)
+#define BM_CLPCR_MASK_L2CC_IDLE (0x1 << 25)
+
+#define CGPR 0x64
+#define BM_CGPR_INT_MEM_CLK_LPM (0x1 << 17)
+
+#define GPC_PGCR 0x0
+#define BM_PGCR_DS_STOP (0x1 << 7)
+#define BM_PGCR_DS_LPSTOP (0x1 << 6)
+#define BM_PGCR_WB_STOP (0x1 << 4)
+#define BM_PGCR_HP_OFF (0x1 << 3)
+#define BM_PGCR_PG_PD1 (0x1 << 0)
+
+#define GPC_LPMR 0x40
+#define BM_LPMR_RUN 0x0
+#define BM_LPMR_STOP 0x2
+
+#define ANATOP_PLL1_CTRL 0x270
+#define ANATOP_PLL2_CTRL 0x30
+#define ANATOP_PLL2_PFD 0x100
+#define BM_PLL_POWERDOWN (0x1 << 12)
+#define BM_PLL_ENABLE (0x1 << 13)
+#define BM_PLL_BYPASS (0x1 << 16)
+#define BM_PLL_LOCK (0x1 << 31)
+#define BM_PLL_PFD2_CLKGATE (0x1 << 15)
+#define BM_PLL_USB_POWER (0x1 << 12)
+#define BM_PLL_EN_USB_CLKS (0x1 << 6)
+
+#define VF610_DDRMC_IO_NUM 94
+#define VF610_IOMUX_DDR_IO_NUM 48
+#define VF610_ANATOP_IO_NUM 2
+
+static struct vf610_cpu_pm_info *pm_info;
+static void __iomem *suspend_ocram_base;
+static void (*vf610_suspend_in_ocram_fn)(void __iomem *ocram_vbase);
+static bool mem_suspend_available;
+
+#ifdef DEBUG
+static void __iomem *uart_membase;
+static unsigned long uart_clk;
+#endif
+
+static const u32 vf610_iomuxc_ddr_io_offset[] __initconst = {
+ 0x220, 0x224, 0x228, 0x22c, 0x230, 0x234, 0x238, 0x23c,
+ 0x240, 0x244, 0x248, 0x24c, 0x250, 0x254, 0x258, 0x25c,
+ 0x260, 0x264, 0x268, 0x26c, 0x270, 0x274, 0x278, 0x27c,
+ 0x280, 0x284, 0x288, 0x28c, 0x290, 0x294, 0x298, 0x29c,
+ 0x2a0, 0x2a4, 0x2a8, 0x2ac, 0x2b0, 0x2b4, 0x2b8, 0x2bc,
+ 0x2c0, 0x2c4, 0x2c8, 0x2cc, 0x2d0, 0x2d4, 0x2d8, 0x21c,
+};
+
+
+static const u32 vf610_ddrmc_io_offset[] __initconst = {
+ 0x00, 0x08, 0x28, 0x2c, 0x30, 0x34, 0x38,
+ 0x40, 0x44, 0x48, 0x50, 0x54, 0x58, 0x5c,
+ 0x60, 0x64, 0x68, 0x70, 0x74, 0x78, 0x7c,
+ 0x84, 0x88, 0x98, 0x9c, 0xa4, 0xc0,
+ 0x108, 0x10c, 0x114, 0x118, 0x120, 0x124,
+ 0x128, 0x12c, 0x130, 0x134, 0x138, 0x13c,
+ 0x148, 0x15c, 0x160, 0x164, 0x16c, 0x180,
+ 0x184, 0x188, 0x18c, 0x198, 0x1a4, 0x1a8,
+ 0x1b8, 0x1d4, 0x1d8, 0x1e0, 0x1e4, 0x1e8,
+ 0x1ec, 0x1f0, 0x1f8, 0x210, 0x224, 0x228,
+ 0x22c, 0x230, 0x23c, 0x240, 0x244, 0x248,
+ 0x24c, 0x250, 0x25c, 0x268, 0x26c, 0x278,
+ 0x268
+};
+
+static const u32 vf610_ddrmc_phy_io_offset[] __initconst = {
+ 0x00, 0x04, 0x08, 0x0c, 0x10,
+ 0x40, 0x44, 0x48, 0x4c, 0x50,
+ 0x80, 0x84, 0x88, 0x8c, 0x90,
+ 0xc4, 0xc8, 0xd0
+};
+
+/*
+ * suspend ocram space layout:
+ * ======================== high address ======================
+ * .
+ * .
+ * .
+ * ^
+ * ^
+ * ^
+ * vf610_suspend code
+ * PM_INFO structure(vf610_cpu_pm_info)
+ * ======================== low address =======================
+ */
+
+struct vf610_pm_base {
+ phys_addr_t pbase;
+ void __iomem *vbase;
+};
+
+struct vf610_pm_socdata {
+ const char *anatop_compat;
+ const char *scsc_compat;
+ const char *wkpu_compat;
+ const char *ccm_compat;
+ const char *gpc_compat;
+ const char *src_compat;
+ const char *ddrmc_compat;
+ const char *iomuxc_compat;
+};
+
+static const struct vf610_pm_socdata vf610_pm_data __initconst = {
+ .anatop_compat = "fsl,vf610-anatop",
+ .scsc_compat = "fsl,vf610-scsc",
+ .wkpu_compat = "fsl,vf610-wkpu",
+ .ccm_compat = "fsl,vf610-ccm",
+ .gpc_compat = "fsl,vf610-gpc",
+ .src_compat = "fsl,vf610-src",
+ .ddrmc_compat = "fsl,vf610-ddrmc",
+ .iomuxc_compat = "fsl,vf610-iomuxc",
+};
+
+/*
+ * This structure is for passing necessary data for low level ocram
+ * suspend code(arch/arm/mach-imx/suspend-vf610.S), if this struct
+ * definition is changed, the offset definition in
+ * arch/arm/mach-imx/suspend-vf610.S must be also changed accordingly,
+ * otherwise, the suspend to ocram function will be broken!
+ */
+struct vf610_cpu_pm_info {
+ phys_addr_t pbase; /* The physical address of pm_info. */
+ phys_addr_t resume_addr; /* The physical resume address for asm code */
+ u32 cpu_type; /* Currently not used, leave it for alignment */
+ u32 pm_info_size; /* Size of pm_info. */
+ struct vf610_pm_base anatop_base;
+ struct vf610_pm_base scsc_base;
+ struct vf610_pm_base wkpu_base;
+ struct vf610_pm_base ccm_base;
+ struct vf610_pm_base gpc_base;
+ struct vf610_pm_base src_base;
+ struct vf610_pm_base ddrmc_base;
+ struct vf610_pm_base iomuxc_base;
+ struct vf610_pm_base l2_base;
+ u32 ccm_cacrr;
+ u32 ccm_ccsr;
+ u32 ddrmc_io_num; /* Number of MMDC IOs which need saved/restored. */
+ u32 ddrmc_io_val[VF610_DDRMC_IO_NUM][2]; /* To save offset and value */
+ u32 iomux_ddr_io_num;
+ u32 iomux_ddr_io_val[VF610_IOMUX_DDR_IO_NUM][2];
+} __aligned(8);
+
+#ifdef DEBUG
+static void vf610_uart_reinit(unsigned long int rate, unsigned long int baud)
+{
+ u8 tmp, c2;
+ u16 sbr, brfa;
+
+ /* UART_C2 */
+ c2 = __raw_readb(uart_membase + 0x3);
+ __raw_writeb(0, uart_membase + 0x3);
+
+ sbr = (u16) (rate / (baud * 16));
+ brfa = (rate / baud) - (sbr * 16);
+
+ tmp = ((sbr & 0x1f00) >> 8);
+ __raw_writeb(tmp, uart_membase + 0x0);
+ tmp = sbr & 0x00ff;
+ __raw_writeb(tmp, uart_membase + 0x1);
+
+ /* UART_C4 */
+ __raw_writeb(brfa & 0xf, uart_membase + 0xa);
+
+ __raw_writeb(c2, uart_membase + 0x3);
+}
+#else
+#define vf610_uart_reinit(rate, baud)
+#endif
+
+static void vf610_set(void __iomem *pll_base, u32 mask)
+{
+ writel(readl(pll_base) | mask, pll_base);
+}
+
+static void vf610_clr(void __iomem *pll_base, u32 mask)
+{
+ writel(readl(pll_base) & ~mask, pll_base);
+}
+
+int vf610_set_lpm(enum vf610_cpu_pwr_mode mode)
+{
+ void __iomem *ccm_base = pm_info->ccm_base.vbase;
+ void __iomem *gpc_base = pm_info->gpc_base.vbase;
+ void __iomem *anatop = pm_info->anatop_base.vbase;
+ u32 ccr = readl_relaxed(ccm_base + CCR);
+ u32 ccsr = readl_relaxed(ccm_base + CCSR);
+ u32 cacrr = readl_relaxed(ccm_base + CACRR);
+ u32 cclpcr = 0;
+ u32 gpc_pgcr = 0;
+
+ switch (mode) {
+ case VF610_LP_STOP:
+ /* Store clock settings */
+ pm_info->ccm_ccsr = ccsr;
+ pm_info->ccm_cacrr = cacrr;
+
+ ccr |= BM_CCR_FIRC_EN;
+ writel_relaxed(ccr, ccm_base + CCR);
+
+ cclpcr |= BM_CLPCR_ANADIG_STOP_MODE;
+ cclpcr |= BM_CLPCR_SBYOS;
+
+ cclpcr |= BM_CLPCR_MASK_SCU_IDLE;
+ cclpcr |= BM_CLPCR_MASK_L2CC_IDLE;
+ cclpcr |= BM_CLPCR_MASK_CORE1_WFI;
+ writel_relaxed(cclpcr, ccm_base + CLPCR);
+
+ gpc_pgcr |= BM_PGCR_DS_STOP;
+ gpc_pgcr |= BM_PGCR_DS_LPSTOP;
+ gpc_pgcr |= BM_PGCR_WB_STOP;
+ gpc_pgcr |= BM_PGCR_HP_OFF;
+ gpc_pgcr |= BM_PGCR_PG_PD1;
+ writel_relaxed(gpc_pgcr, gpc_base + GPC_PGCR);
+ break;
+ case VF610_STOP:
+ cclpcr &= ~BM_CLPCR_ANADIG_STOP_MODE;
+ cclpcr |= BM_CLPCR_ARM_CLK_DIS_ON_LPM;
+ cclpcr |= BM_CLPCR_SBYOS;
+ writel_relaxed(cclpcr, ccm_base + CLPCR);
+
+ gpc_pgcr |= BM_PGCR_DS_STOP;
+ gpc_pgcr |= BM_PGCR_HP_OFF;
+ writel_relaxed(gpc_pgcr, gpc_base + GPC_PGCR);
+
+ /* fall-through */
+ case VF610_LP_RUN:
+ /* Store clock settings */
+ pm_info->ccm_ccsr = ccsr;
+ pm_info->ccm_cacrr = cacrr;
+
+ ccr |= BM_CCR_FIRC_EN;
+ writel_relaxed(ccr, ccm_base + CCR);
+
+ /* Enable PLL2 for DDR clock */
+ vf610_set(anatop + ANATOP_PLL2_CTRL, BM_PLL_ENABLE);
+ vf610_clr(anatop + ANATOP_PLL2_CTRL, BM_PLL_POWERDOWN);
+ vf610_clr(anatop + ANATOP_PLL2_CTRL, BM_PLL_BYPASS);
+ while (!(readl(anatop + ANATOP_PLL2_CTRL) & BM_PLL_LOCK));
+ vf610_clr(anatop + ANATOP_PLL2_PFD, BM_PLL_PFD2_CLKGATE);
+
+ /* Switch internal OSC's */
+ ccsr &= ~BM_CCSR_FAST_CLK_SEL;
+ ccsr &= ~BM_CCSR_SLOW_CLK_SEL;
+
+ /* Select PLL2 as DDR clock */
+ ccsr &= ~BM_CCSR_DDRC_CLK_SEL;
+ writel_relaxed(ccsr, ccm_base + CCSR);
+
+ ccsr &= ~BM_CCSR_SYS_CLK_SEL_MASK;
+ writel_relaxed(ccsr, ccm_base + CCSR);
+ vf610_uart_reinit(4000000UL, 115200);
+
+ vf610_set(anatop + ANATOP_PLL1_CTRL, BM_PLL_BYPASS);
+ writel_relaxed(BM_LPMR_STOP, gpc_base + GPC_LPMR);
+ break;
+ case VF610_RUN:
+ writel_relaxed(BM_LPMR_RUN, gpc_base + GPC_LPMR);
+
+ vf610_clr(anatop + ANATOP_PLL1_CTRL, BM_PLL_BYPASS);
+ while(!(readl(anatop + ANATOP_PLL1_CTRL) & BM_PLL_LOCK));
+
+ /* Restore clock settings */
+ writel(pm_info->ccm_ccsr, ccm_base + CCSR);
+
+ vf610_uart_reinit(uart_clk, 115200);
+ pr_pmdebug("resuming, uart_reinit done");
+
+ /* Disable PLL2 if not needed */
+ if (pm_info->ccm_ccsr & BM_CCSR_DDRC_CLK_SEL)
+ vf610_set(anatop + ANATOP_PLL2_CTRL, BM_PLL_POWERDOWN);
+
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int vf610_suspend_finish(unsigned long val)
+{
+ if (!vf610_suspend_in_ocram_fn) {
+ cpu_do_idle();
+ } else {
+ /*
+ * call low level suspend function in ocram,
+ * as we need to float DDR IO.
+ */
+ local_flush_tlb_all();
+ flush_cache_all();
+ outer_flush_all();
+ vf610_suspend_in_ocram_fn(suspend_ocram_base);
+ }
+
+ return 0;
+}
+
+static int vf610_pm_enter(suspend_state_t state)
+{
+ switch (state) {
+ case PM_SUSPEND_STANDBY:
+ vf610_set_lpm(VF610_STOP);
+ flush_cache_all();
+
+ /* zzZZZzzz */
+ cpu_do_idle();
+
+ vf610_set_lpm(VF610_RUN);
+ break;
+ case PM_SUSPEND_MEM:
+ vf610_set_lpm(VF610_LP_STOP);
+
+ cpu_suspend(0, vf610_suspend_finish);
+ outer_resume();
+
+ vf610_set_lpm(VF610_RUN);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int vf610_pm_valid(suspend_state_t state)
+{
+ return (state == PM_SUSPEND_STANDBY ||
+ (state == PM_SUSPEND_MEM && mem_suspend_available));
+}
+
+static const struct platform_suspend_ops vf610_pm_ops = {
+ .enter = vf610_pm_enter,
+ .valid = vf610_pm_valid,
+};
+
+static int __init imx_pm_get_base(struct vf610_pm_base *base,
+ const char *compat)
+{
+ struct device_node *node;
+ struct resource res;
+ int ret = 0;
+
+ node = of_find_compatible_node(NULL, NULL, compat);
+ if (!node) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ ret = of_address_to_resource(node, 0, &res);
+ if (ret)
+ goto put_node;
+
+ base->pbase = res.start;
+ base->vbase = ioremap(res.start, resource_size(&res));
+
+ if (!base->vbase)
+ ret = -ENOMEM;
+
+put_node:
+ of_node_put(node);
+out:
+ return ret;
+}
+
+#ifdef DEBUG
+static int __init vf610_uart_init(void)
+{
+ struct device_node *dn;
+ const char *name;
+ struct clk *clk;
+ int ret;
+
+ name = of_get_property(of_chosen, "stdout-path", NULL);
+ if (name == NULL)
+ return -ENODEV;
+
+ dn = of_find_node_by_path(name);
+ if (!dn)
+ return -ENODEV;
+
+ clk = of_clk_get(dn, 0);
+
+ if (!clk) {
+ ret = PTR_ERR(clk);
+ goto put_node;
+ }
+
+ uart_clk = clk_get_rate(clk);
+
+ uart_membase = of_iomap(dn, 0);
+ if (!clk) {
+ ret = -ENOMEM;
+ goto put_node;
+ }
+
+ ret = 0;
+
+put_node:
+ of_node_put(dn);
+ return ret;
+}
+#endif
+
+static void vf610_power_off(void)
+{
+ void __iomem *gpc_base = pm_info->gpc_base.vbase;
+ u32 gpc_pgcr;
+
+ /*
+ * Power gate Power Domain 1
+ */
+ gpc_pgcr = readl_relaxed(gpc_base + GPC_PGCR);
+ gpc_pgcr |= BM_PGCR_PG_PD1;
+ writel_relaxed(gpc_pgcr, gpc_base + GPC_PGCR);
+
+ /* Set low power mode */
+ vf610_set_lpm(VF610_STOP);
+}
+
+static int __init vf610_suspend_mem_init(const struct vf610_pm_socdata *socdata)
+{
+ struct device_node *node;
+ struct platform_device *pdev;
+ bool has_cke_reset_pulls = false;
+ phys_addr_t ocram_pbase;
+ struct gen_pool *ocram_pool;
+ size_t ocram_size;
+ unsigned long ocram_base;
+ int ret = 0, reg = 0;
+ int i;
+
+ node = of_find_compatible_node(NULL, NULL, socdata->ddrmc_compat);
+ if (node) {
+ has_cke_reset_pulls =
+ of_property_read_bool(node, "fsl,has-cke-reset-pulls");
+
+ of_node_put(node);
+ }
+
+ if (!has_cke_reset_pulls) {
+ pr_info("PM: No CKE/RESET pulls, disable Suspend-to-RAM\n");
+ return -ENODEV;
+ }
+
+ node = of_find_compatible_node(NULL, NULL, "mmio-sram");
+ if (!node) {
+ pr_warn("%s: failed to find ocram node!\n", __func__);
+ return -ENODEV;
+ }
+
+ pdev = of_find_device_by_node(node);
+ if (!pdev) {
+ pr_warn("%s: failed to find ocram device!\n", __func__);
+ ret = -ENODEV;
+ goto put_node;
+ }
+
+ ocram_pool = gen_pool_get(&pdev->dev, "stbyram1");
+ if (!ocram_pool) {
+ pr_warn("%s: ocram pool unavailable!\n", __func__);
+ ret = -ENODEV;
+ goto put_node;
+ }
+
+ ocram_size = gen_pool_size(ocram_pool);
+ ocram_base = gen_pool_alloc(ocram_pool, ocram_size);
+ if (!ocram_base) {
+ pr_warn("%s: unable to alloc ocram!\n", __func__);
+ ret = -ENOMEM;
+ goto put_node;
+ }
+
+ ocram_pbase = gen_pool_virt_to_phys(ocram_pool, ocram_base);
+
+ suspend_ocram_base = __arm_ioremap_exec(ocram_pbase, ocram_size, false);
+
+ pm_info = suspend_ocram_base;
+ pm_info->pbase = ocram_pbase;
+ pm_info->resume_addr = virt_to_phys(cpu_resume);
+
+ pm_info->ddrmc_io_num = VF610_DDRMC_IO_NUM;
+
+ ret = imx_pm_get_base(&pm_info->ddrmc_base, socdata->ddrmc_compat);
+ if (ret) {
+ pr_warn("%s: failed to get ddrmc base %d!\n", __func__, ret);
+ goto put_node;
+ }
+
+ ret = imx_pm_get_base(&pm_info->iomuxc_base, socdata->iomuxc_compat);
+ if (ret) {
+ pr_warn("%s: failed to get iomuxc base %d!\n", __func__, ret);
+ goto iomuxc_map_failed;
+ }
+
+ /* Store DDRMC registers */
+ for (i = 0; i < ARRAY_SIZE(vf610_ddrmc_io_offset); i++, reg++) {
+ pm_info->ddrmc_io_val[reg][0] = vf610_ddrmc_io_offset[i];
+ pm_info->ddrmc_io_val[reg][1] =
+ readl_relaxed(pm_info->ddrmc_base.vbase +
+ vf610_ddrmc_io_offset[i]);
+ }
+
+ /* Store DDRMC PHY registers */
+ for (i = 0; i < ARRAY_SIZE(vf610_ddrmc_phy_io_offset); i++, reg++) {
+ pm_info->ddrmc_io_val[reg][0] = vf610_ddrmc_phy_io_offset[i] +
+ DDRMC_PHY_OFFSET;
+ pm_info->ddrmc_io_val[reg][1] =
+ readl_relaxed(pm_info->ddrmc_base.vbase +
+ DDRMC_PHY_OFFSET + vf610_ddrmc_phy_io_offset[i]);
+ }
+
+ /* Store IOMUX DDR pad registers */
+ pm_info->iomux_ddr_io_num = VF610_IOMUX_DDR_IO_NUM;
+ for (i = 0; i < ARRAY_SIZE(vf610_iomuxc_ddr_io_offset); i++) {
+ pm_info->iomux_ddr_io_val[i][0] = vf610_iomuxc_ddr_io_offset[i];
+ pm_info->iomux_ddr_io_val[i][1] =
+ readl_relaxed(pm_info->iomuxc_base.vbase +
+ vf610_iomuxc_ddr_io_offset[i]);
+ }
+
+ vf610_suspend_in_ocram_fn = fncpy(
+ suspend_ocram_base + sizeof(*pm_info),
+ &vf610_suspend, ocram_size - sizeof(*pm_info));
+
+ pr_info("PM: CKE/RESET pulls available, enable Suspend-to-RAM\n");
+ goto put_node;
+
+iomuxc_map_failed:
+ iounmap(pm_info->ddrmc_base.vbase);
+put_node:
+ of_node_put(node);
+
+ return ret;
+}
+
+static int __init vf610_suspend_init(const struct vf610_pm_socdata *socdata)
+{
+ int ret;
+ struct device_node *soc_node;
+
+#ifdef DEBUG
+ ret = vf610_uart_init();
+ if (ret < 0)
+ return ret;
+#endif
+
+ soc_node = of_find_node_by_path("/soc");
+ if (soc_node == NULL)
+ return -ENODEV;
+
+ if (of_property_read_bool(soc_node, "fsl,use-lpm-poweroff"))
+ pm_power_off = vf610_power_off;
+
+ if (vf610_suspend_mem_init(socdata)) {
+ /*
+ * Suspend to memory for some reason not available, use DDR
+ * for standby mode
+ */
+ pm_info = kzalloc(sizeof(*pm_info), GFP_KERNEL);
+ } else {
+ mem_suspend_available = true;
+ }
+
+ pm_info->pm_info_size = sizeof(*pm_info);
+
+ ret = imx_pm_get_base(&pm_info->anatop_base, socdata->anatop_compat);
+ if (ret) {
+ pr_warn("%s: failed to get anatop base %d!\n", __func__, ret);
+ return ret;
+ }
+
+ ret = imx_pm_get_base(&pm_info->scsc_base, socdata->scsc_compat);
+ if (ret) {
+ pr_warn("%s: failed to get scsc base %d!\n", __func__, ret);
+ goto scsc_map_failed;
+ }
+
+ ret = imx_pm_get_base(&pm_info->ccm_base, socdata->ccm_compat);
+ if (ret) {
+ pr_warn("%s: failed to get ccm base %d!\n", __func__, ret);
+ goto ccm_map_failed;
+ }
+
+ ret = imx_pm_get_base(&pm_info->gpc_base, socdata->gpc_compat);
+ if (ret) {
+ pr_warn("%s: failed to get gpc base %d!\n", __func__, ret);
+ goto gpc_map_failed;
+ }
+
+ ret = imx_pm_get_base(&pm_info->src_base, socdata->src_compat);
+ if (ret) {
+ pr_warn("%s: failed to get src base %d!\n", __func__, ret);
+ goto src_map_failed;
+ }
+
+ ret = imx_pm_get_base(&pm_info->l2_base, "arm,pl310-cache");
+ if (ret == -ENODEV)
+ ret = 0;
+ if (ret) {
+ pr_warn("%s: failed to get pl310-cache base %d!\n",
+ __func__, ret);
+ goto pl310_cache_map_failed;
+ }
+
+ suspend_set_ops(&vf610_pm_ops);
+
+ return 0;
+
+pl310_cache_map_failed:
+ iounmap(pm_info->src_base.vbase);
+src_map_failed:
+ iounmap(pm_info->gpc_base.vbase);
+gpc_map_failed:
+ iounmap(pm_info->ccm_base.vbase);
+ccm_map_failed:
+ iounmap(pm_info->scsc_base.vbase);
+scsc_map_failed:
+ iounmap(pm_info->anatop_base.vbase);
+
+ if (mem_suspend_available) {
+ iounmap(pm_info->ddrmc_base.vbase);
+ iounmap(pm_info->iomuxc_base.vbase);
+ }
+
+ return ret;
+}
+
+void __init vf610_pm_init(void)
+{
+ int ret;
+
+ if (IS_ENABLED(CONFIG_SUSPEND)) {
+ ret = vf610_suspend_init(&vf610_pm_data);
+ if (ret)
+ pr_warn("%s: No DDR LPM support with suspend %d!\n",
+ __func__, ret);
+ }
+}
+
diff --git a/arch/arm/mach-imx/suspend-vf610.S b/arch/arm/mach-imx/suspend-vf610.S
new file mode 100644
index 000000000000..595dd4e2c74c
--- /dev/null
+++ b/arch/arm/mach-imx/suspend-vf610.S
@@ -0,0 +1,448 @@
+/*
+ * Copyright 2014 Freescale Semiconductor, Inc.
+ * Copyright 2015 Toradex AG
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/asm-offsets.h>
+#include <asm/hardware/cache-l2x0.h>
+
+/*
+ * ==================== low level suspend ====================
+ *
+ * Better to follow below rules to use ARM registers:
+ * r0: pm_info structure address;
+ * r1 ~ r4: for saving pm_info members;
+ * r5 ~ r10: free registers;
+ * r11: io base address.
+ *
+ * suspend ocram space layout:
+ * ======================== high address ======================
+ * .
+ * .
+ * .
+ * ^
+ * ^
+ * ^
+ * vf610_suspend code
+ * PM_INFO structure(vf610_cpu_pm_info)
+ * ======================== low address =======================
+ */
+
+/*
+ * Below offsets are based on struct vf610_cpu_pm_info
+ * which defined in arch/arm/mach-imx/pm-vf610.c, this
+ * structure contains necessary pm info for low level
+ * suspend related code.
+ */
+#define PM_INFO_PBASE_OFFSET 0x0
+#define PM_INFO_RESUME_ADDR_OFFSET 0x4
+#define PM_INFO_CPU_TYPE_OFFSET 0x8
+#define PM_INFO_PM_INFO_SIZE_OFFSET 0xC
+#define PM_INFO_VF610_ANATOP_P_OFFSET 0x10
+#define PM_INFO_VF610_ANATOP_V_OFFSET 0x14
+#define PM_INFO_VF610_SCSC_P_OFFSET 0x18
+#define PM_INFO_VF610_SCSC_V_OFFSET 0x1C
+#define PM_INFO_VF610_WKPU_P_OFFSET 0x20
+#define PM_INFO_VF610_WKPU_V_OFFSET 0x24
+#define PM_INFO_VF610_CCM_P_OFFSET 0x28
+#define PM_INFO_VF610_CCM_V_OFFSET 0x2C
+#define PM_INFO_VF610_GPC_P_OFFSET 0x30
+#define PM_INFO_VF610_GPC_V_OFFSET 0x34
+#define PM_INFO_VF610_SRC_P_OFFSET 0x38
+#define PM_INFO_VF610_SRC_V_OFFSET 0x3C
+#define PM_INFO_VF610_DDRMC_P_OFFSET 0x40
+#define PM_INFO_VF610_DDRMC_V_OFFSET 0x44
+#define PM_INFO_VF610_IOMUXC_P_OFFSET 0x48
+#define PM_INFO_VF610_IOMUXC_V_OFFSET 0x4c
+#define PM_INFO_VF610_L2_P_OFFSET 0x50
+#define PM_INFO_VF610_L2_V_OFFSET 0x54
+#define PM_INFO_CCM_CACRR 0x58
+#define PM_INFO_CCM_CCSR 0x5c
+#define PM_INFO_DDRMC_IO_NUM_OFFSET 0x60
+#define PM_INFO_DDRMC_IO_VAL_OFFSET 0x64
+#define PM_INFO_IOMUXC_DDR_IO_NUM_OFFSET (0x64 + 94 * 2 * 4)
+#define PM_INFO_IOMUXC_DDR_IO_VAL_OFFSET (0x68 + 94 * 2 * 4)
+
+#define VF610_ANADIG_PLL2_CTRL 0x30
+
+#define VF610_ANADIG_MISC0 0x150
+#define VF610_ANADIG_MISC0_CLK_24M_IRC_XTAL_SEL (0x1 < 13)
+
+#define VF610_ANADIG_PLL1_CTRL 0x270
+
+#define VF610_ANADIG_POWERDOWN (1 << 12)
+#define VF610_ANADIG_ENABLE (1 << 13)
+#define VF610_ANADIG_BYPASS (1 << 16)
+#define VF610_ANADIG_LOCK (1 << 31)
+
+#define VF610_SCSC_SIRC 0x0
+#define VF610_SCSC_SIRC_SIRC_EN (0x1 << 0)
+#define VF610_SCSC_SOSC 0x4
+#define VF610_SCSC_SOSC_SOSC_EN (0x1 << 0)
+
+#define VF610_GPC_PGCR 0x0
+#define VF610_GPC_LPMR 0x40
+
+#define VF610_CCM_CCR 0x00
+#define VF610_CCM_CCR_FXOSC_EN (0x1 << 12)
+
+#define VF610_CCM_CCSR 0x08
+#define VF610_CCM_CCSR_DDRC_CLK_SEL (0x1 << 6)
+#define VF610_CCM_CCSR_FAST_CLK_SEL (0x1 << 5)
+
+#define VF610_CCM_CACRR 0x0C
+
+#define VF610_CCM_CLPCR 0x2C
+#define VF610_CCM_CLPCR_DIS_REF_OSC (0x1 << 7)
+#define VF610_CCM_CLPCR_FXOSC_PWRDWN (0x1 << 11)
+
+#define VF610_CCM_CCGR0 0x40
+#define VF610_CCM_CCGR2 0x48
+#define VF610_CCM_CCGR3 0x4C
+#define VF610_CCM_CCGR4 0x50
+#define VF610_CCM_CCGR6 0x58
+
+#define VF610_SRC_GPR0 0x20
+#define VF610_SRC_GPR1 0x24
+#define VF610_SRC_MISC2 0x54
+
+#define VF610_DDRMC_CR00 0x0
+#define VF610_DDRMC_CR00_START (0x1 << 0)
+
+#define VF610_DDRMC_CR33 0x84
+#define VF610_DDRMC_CR33_PWUP_SREF_EX (0x1 << 0)
+
+#define VF610_DDRMC_CR34 0x88
+
+#define VF610_DDRMC_CR35 0x8C
+#define VF610_DDRMC_CR35_LP_CMD(cmd) ((cmd) << 8)
+
+#define VF610_DDRMC_CR80 0x140
+#define VF610_DDRMC_CR80_LP_COMPLETE (0x1 << 9)
+#define VF610_DDRMC_CR80_INIT_COMPLETE (0x1 << 8)
+#define VF610_DDRMC_CR81 0x144
+
+ .align 3
+
+ /*
+ * Take DDR RAM out of Low-Power mode
+ */
+ .macro resume_ddrmc ddrmc_base
+
+ /* Clear low power complete flag... */
+ ldr r6, =VF610_DDRMC_CR80_LP_COMPLETE
+ str r6, [\ddrmc_base, #VF610_DDRMC_CR81]
+
+ ldr r6, [\ddrmc_base, #VF610_DDRMC_CR35]
+ orr r6, r6, #VF610_DDRMC_CR35_LP_CMD(0x9)
+ str r6, [\ddrmc_base, #VF610_DDRMC_CR35]
+
+1:
+ ldr r5, [\ddrmc_base, #VF610_DDRMC_CR80]
+ ands r5, r5, #VF610_DDRMC_CR80_LP_COMPLETE
+ beq 1b
+
+ .endm
+
+ .macro enable_syspll pll_base
+
+ ldr r5, [\pll_base]
+ orr r5, r5, #VF610_ANADIG_ENABLE
+ bic r5, r5, #VF610_ANADIG_POWERDOWN
+ bic r5, r5, #VF610_ANADIG_BYPASS
+ str r5, [\pll_base]
+
+1:
+ ldr r5, [\pll_base]
+ tst r5, #VF610_ANADIG_LOCK
+ beq 1b
+
+ .endm
+
+ENTRY(vf610_suspend)
+ ldr r1, [r0, #PM_INFO_PBASE_OFFSET]
+ ldr r2, [r0, #PM_INFO_RESUME_ADDR_OFFSET]
+ ldr r3, [r0, #PM_INFO_CPU_TYPE_OFFSET]
+ ldr r4, [r0, #PM_INFO_PM_INFO_SIZE_OFFSET]
+
+ /*
+ * make sure TLB contain the addr we want,
+ * as we will access them after MMDC IO floated.
+ */
+
+ ldr r11, [r0, #PM_INFO_VF610_DDRMC_V_OFFSET]
+ ldr r6, [r11, #0x0]
+ ldr r11, [r0, #PM_INFO_VF610_GPC_V_OFFSET]
+ ldr r6, [r11, #0x0]
+ ldr r11, [r0, #PM_INFO_VF610_SRC_V_OFFSET]
+ ldr r6, [r11, #0x0]
+ ldr r11, [r0, #PM_INFO_VF610_CCM_V_OFFSET]
+ ldr r6, [r11, #0x0]
+
+ ldr r11, [r0, #PM_INFO_VF610_SRC_V_OFFSET]
+
+ /* Disable DDR RESET */
+ ldr r6, [r11, #VF610_SRC_MISC2]
+ orr r6, r6, #0x1
+ str r6, [r11, #VF610_SRC_MISC2]
+
+ /* Set ENTRY/ARGUMENT register */
+ ldr r6, =vf610_suspend
+ ldr r7, =resume
+ sub r7, r7, r6
+ add r8, r1, r4
+ add r9, r8, r7
+ str r9, [r11, #VF610_SRC_GPR0]
+ str r1, [r11, #VF610_SRC_GPR1]
+
+ /* Put memory in self refresh... */
+ ldr r11, [r0, #PM_INFO_VF610_DDRMC_V_OFFSET]
+
+ ldr r6, =VF610_DDRMC_CR80_LP_COMPLETE
+ str r6, [r11, #VF610_DDRMC_CR81]
+
+ ldr r6, [r11, #VF610_DDRMC_CR35]
+ orr r6, r6, #VF610_DDRMC_CR35_LP_CMD(0xA)
+ str r6, [r11, #VF610_DDRMC_CR35]
+
+ddrmc_cmd_complete:
+ /* A Unfixed module seems to hang at this read.... */
+ ldr r5, [r11, #VF610_DDRMC_CR80]
+ ands r5, r5, #VF610_DDRMC_CR80_LP_COMPLETE
+ beq ddrmc_cmd_complete
+
+ /* switch to internal FIRC */
+ ldr r11, [r0, #PM_INFO_VF610_CCM_V_OFFSET]
+ ldr r5, [r11, #VF610_CCM_CCSR]
+ bic r5, r5, #0x30 /* FAST_/SLOW_CLK_SEL */
+ str r5, [r11, #VF610_CCM_CCSR]
+ bic r5, r5, #0x07 /* SYS_CLK_SEL */
+ str r5, [r11, #VF610_CCM_CCSR]
+
+ /* LP-Mode: STOP */
+ ldr r11, [r0, #PM_INFO_VF610_GPC_V_OFFSET]
+ ldr r6, =0x02
+ str r6, [r11, #VF610_GPC_LPMR]
+
+ /* Zzz, enter stop mode */
+ wfi
+ nop
+ nop
+ nop
+ nop
+
+ /* If we get here, there is already an interrupt pending. Restore... */
+ ldr r6, =0x00
+ str r6, [r11, #VF610_GPC_LPMR]
+
+ /* Get previous CCSR/CACRR settings */
+ ldr r11, [r0, #PM_INFO_VF610_CCM_V_OFFSET]
+ ldr r5, [r0, #PM_INFO_CCM_CCSR]
+ str r5, [r11, #VF610_CCM_CCSR]
+
+ ldr r5, [r0, #PM_INFO_CCM_CACRR]
+ str r5, [r11, #VF610_CCM_CACRR]
+
+ ldr r11, [r0, #PM_INFO_VF610_DDRMC_V_OFFSET]
+ resume_ddrmc r11
+
+ ret lr
+
+/* Resume path if CPU uses the SRC_GPR0 (PERSISTENT_ENTRY0) */
+resume:
+ /* invalidate L1 I-cache first */
+ mov r6, #0x0
+ mcr p15, 0, r6, c7, c5, 0
+ mcr p15, 0, r6, c7, c5, 6
+
+ /* enable the Icache and branch prediction */
+ mov r6, #0x1800
+ mcr p15, 0, r6, c1, c0, 0
+ isb
+
+ ldr r11, [r0, #PM_INFO_VF610_CCM_P_OFFSET]
+
+ ldr r5, [r11, #VF610_CCM_CCSR]
+ orr r5, r5, #(1 << 13)
+ str r5, [r11, #VF610_CCM_CCSR]
+
+ /* enable UART0 */
+ ldr r5, [r11, #VF610_CCM_CCGR0]
+ orr r5, r5, #0xC000
+ str r5, [r11, #VF610_CCM_CCGR0]
+
+ /* enable IOMUX, PORT A-E */
+ ldr r5, [r11, #VF610_CCM_CCGR2]
+ ldr r6, =0xFFF0000
+ orr r5, r5, r6
+ str r5, [r11, #VF610_CCM_CCGR2]
+
+ /* enable ANADIG and SCSM */
+ ldr r5, [r11, #VF610_CCM_CCGR3]
+ orr r5, r5, #0x33
+ str r5, [r11, #VF610_CCM_CCGR3]
+
+ /* enable GPC, CCM and WKUP */
+ ldr r5, [r11, #VF610_CCM_CCGR4]
+ orr r5, r5, #0x3f00000
+ str r5, [r11, #VF610_CCM_CCGR4]
+
+ /* enable mmdc */
+ ldr r5, [r11, #VF610_CCM_CCGR6]
+ orr r5, r5, #0x30000000
+ str r5, [r11, #VF610_CCM_CCGR6]
+
+ /* Mux UART0 */
+ ldr r5,=0x1021a2
+ ldr r6,=0x40048080
+ str r5, [r6, #0x0]
+ ldr r5,=0x1021a1
+ ldr r6,=0x40048084
+ str r5, [r6, #0x0]
+
+ /* Set IOMUX for DDR pads */
+ ldr r11, [r0, #PM_INFO_VF610_IOMUXC_P_OFFSET]
+
+ ldr r6, [r0, #PM_INFO_IOMUXC_DDR_IO_NUM_OFFSET]
+ ldr r7, =PM_INFO_IOMUXC_DDR_IO_VAL_OFFSET
+ add r7, r7, r0
+
+loop_iomuxc_ddr_restore:
+ ldr r8, [r7], #0x4
+ ldr r9, [r7], #0x4
+ str r9, [r11, r8]
+ subs r6, r6, #0x1
+ bne loop_iomuxc_ddr_restore
+
+
+ /* Enable slow oscilators */
+ ldr r11, [r0, #PM_INFO_VF610_SCSC_P_OFFSET]
+
+ ldr r5, [r11, #VF610_SCSC_SOSC]
+ orr r5, r5, #VF610_SCSC_SOSC_SOSC_EN
+ str r5, [r11, #VF610_SCSC_SOSC]
+
+ ldr r5, [r11, #VF610_SCSC_SIRC]
+ orr r5, r5, #VF610_SCSC_SIRC_SIRC_EN
+ str r5, [r11, #VF610_SCSC_SIRC]
+
+ /* Enable fast osciallator */
+ ldr r11, [r0, #PM_INFO_VF610_CCM_P_OFFSET]
+
+ ldr r5, [r11, #VF610_CCM_CLPCR]
+ bic r5, r5, #VF610_CCM_CLPCR_DIS_REF_OSC
+ bic r5, r5, #VF610_CCM_CLPCR_FXOSC_PWRDWN
+ str r5, [r11, #VF610_CCM_CLPCR]
+
+ ldr r5, [r11, #VF610_CCM_CCR]
+ orr r5, r5, #VF610_CCM_CCR_FXOSC_EN
+ str r5, [r11, #VF610_CCM_CCR]
+
+ ldr r5, [r11, #VF610_CCM_CCSR]
+ orr r5, r5, #VF610_CCM_CCSR_FAST_CLK_SEL
+ str r5, [r11, #VF610_CCM_CCSR]
+
+ ldr r11, [r0, #PM_INFO_VF610_ANATOP_P_OFFSET]
+
+ /* Select external FXOSC */
+ ldr r5, [r11, #VF610_ANADIG_MISC0]
+ bic r5, r5, #VF610_ANADIG_MISC0_CLK_24M_IRC_XTAL_SEL
+ str r5, [r11, #VF610_ANADIG_MISC0]
+
+ /* pll1 enable */
+ add r6, r11, #VF610_ANADIG_PLL1_CTRL
+ enable_syspll r6
+
+ /* enable pll2 only if required for DDR */
+ ldr r5, [r0, #PM_INFO_CCM_CCSR]
+ tst r5, #VF610_CCM_CCSR_DDRC_CLK_SEL
+ bne switch_sysclk
+
+ /* pll2 enable */
+ add r6, r11, #VF610_ANADIG_PLL2_CTRL
+ enable_syspll r6
+
+switch_sysclk:
+
+ /* Enable PFD and switch to fast clock */
+ ldr r11, [r0, #PM_INFO_VF610_CCM_P_OFFSET]
+
+ /* Get previous CCSR/CACRR settings */
+ ldr r5, [r0, #PM_INFO_CCM_CCSR]
+ str r5, [r11, #VF610_CCM_CCSR]
+
+ ldr r5, [r0, #PM_INFO_CCM_CACRR]
+ str r5, [r11, #VF610_CCM_CACRR]
+
+ /* Restore memory configuration */
+ ldr r11, [r0, #PM_INFO_VF610_DDRMC_P_OFFSET]
+
+ ldr r6, [r0, #PM_INFO_DDRMC_IO_NUM_OFFSET]
+ ldr r7, =PM_INFO_DDRMC_IO_VAL_OFFSET
+ add r7, r7, r0
+
+ /* Clear start bit of first memory register, do not start yet... */
+ ldr r8, [r7], #0x4
+ ldr r9, [r7], #0x4
+ bic r9, r9, #VF610_DDRMC_CR00_START
+ str r9, [r11, r8]
+ subs r6, r6, #0x1
+
+loop_ddrmc_restore:
+ ldr r8, [r7], #0x4
+ ldr r9, [r7], #0x4
+ str r9, [r11, r8]
+ subs r6, r6, #0x1
+ bne loop_ddrmc_restore
+
+ /* Set PWUP_SREF_EX to avoid a full memory initialization */
+ ldr r6, [r11, #VF610_DDRMC_CR33]
+ orr r6, r6, #VF610_DDRMC_CR33_PWUP_SREF_EX
+ str r6, [r11, #VF610_DDRMC_CR33]
+
+ /* Start initialization */
+ ldr r6, =VF610_DDRMC_CR80_INIT_COMPLETE
+ str r6, [r11, #VF610_DDRMC_CR81]
+
+ ldr r6, [r11, #VF610_DDRMC_CR00]
+ orr r6, r6, #VF610_DDRMC_CR00_START
+ str r6, [r11, #VF610_DDRMC_CR00]
+
+ddrmc_initializing:
+ ldr r5, [r11, #VF610_DDRMC_CR80]
+ ands r5, r5, #VF610_DDRMC_CR80_INIT_COMPLETE
+ beq ddrmc_initializing
+
+ resume_ddrmc r11
+
+ /* LP-Mode: RUN */
+ ldr r11, [r0, #PM_INFO_VF610_GPC_P_OFFSET]
+ ldr r5, =0x0
+ str r5, [r11, #VF610_GPC_LPMR]
+
+ /* Enable SNVS */
+ ldr r3, [r0, #PM_INFO_VF610_CCM_P_OFFSET]
+ ldr r4, [r3, #VF610_CCM_CCGR6]
+ orr r4, r4, #0x0000C000
+ str r4, [r3, #VF610_CCM_CCGR6]
+
+ /* Enable SNVS access (RTC) */
+ ldr r11, =0x400a7000
+ ldr r4, =0x80000100
+ str r4, [r11, #0x4]
+
+ /* get physical resume address from pm_info. */
+ ldr lr, [r0, #PM_INFO_RESUME_ADDR_OFFSET]
+
+ ret lr
+ENDPROC(vf610_suspend)
+
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-27 19:17:25 +0000