[PATCH v9 1/4] ARM: rockchip: add suspend and resume for RK3288
From: Chris Zhong
Date: Tue Nov 25 2014 - 02:32:54 EST
It's a basic version of suspend and resume for rockchip,
it only support RK3288 now.
Signed-off-by: Tony Xie <xxx@xxxxxxxxxxxxxx>
Signed-off-by: Chris Zhong <zyw@xxxxxxxxxxxxxx>
Signed-off-by: Doug Anderson <dianders@xxxxxxxxxxxx>
Tested-by: Doug Anderson <dianders@xxxxxxxxxxxx>
Reviewed-by: Doug Anderson <dianders@xxxxxxxxxxxx>
---
Changes in v9:
- fold Doug's patches
- modify some print log
Changes in v8:
- use enum for define sleep mode
- move rk3288_config_bootdata to the front of sram memcpy
Changes in v7:
- get rid all of unused code
Changes in v6:
- get rid of the save/restore of SRAM
- doing the copy of resume code once at init time
- remove ROCKCHIP_ARM_OFF_LOGIC_DEEP from rk3288_fill_in_bootram
- add of_platform_populate in rockchip_dt_init
Changes in v5:
- use rk3288_bootram_sz for memcpy size
- fixed error of sram save and restore
Changes in v4:
- remove grf regmap
Changes in v3:
- move the pinmux of gpio6_c6 save and restore to pinctrl-rockchip
Changes in v2:
- add the regulator calls in prepare and finish.
- add the pinmux of gpio6_c6 save and restore
arch/arm/mach-rockchip/Makefile | 1 +
arch/arm/mach-rockchip/pm.c | 260 ++++++++++++++++++++++++++++++++++++++
arch/arm/mach-rockchip/pm.h | 99 +++++++++++++++
arch/arm/mach-rockchip/rockchip.c | 2 +
arch/arm/mach-rockchip/sleep.S | 73 +++++++++++
5 files changed, 435 insertions(+)
create mode 100644 arch/arm/mach-rockchip/pm.c
create mode 100644 arch/arm/mach-rockchip/pm.h
create mode 100644 arch/arm/mach-rockchip/sleep.S
diff --git a/arch/arm/mach-rockchip/Makefile b/arch/arm/mach-rockchip/Makefile
index b29d8ea..5c3a9b2 100644
--- a/arch/arm/mach-rockchip/Makefile
+++ b/arch/arm/mach-rockchip/Makefile
@@ -1,4 +1,5 @@
CFLAGS_platsmp.o := -march=armv7-a
obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip.o
+obj-$(CONFIG_PM_SLEEP) += pm.o sleep.o
obj-$(CONFIG_SMP) += headsmp.o platsmp.o
diff --git a/arch/arm/mach-rockchip/pm.c b/arch/arm/mach-rockchip/pm.c
new file mode 100644
index 0000000..50cb781
--- /dev/null
+++ b/arch/arm/mach-rockchip/pm.c
@@ -0,0 +1,260 @@
+/*
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ * Author: Tony Xie <tony.xie@xxxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/regmap.h>
+#include <linux/suspend.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regulator/machine.h>
+
+#include <asm/cacheflush.h>
+#include <asm/tlbflush.h>
+#include <asm/suspend.h>
+
+#include "pm.h"
+
+/* These enum are option of low power mode */
+enum {
+ ROCKCHIP_ARM_OFF_LOGIC_NORMAL = 0,
+ ROCKCHIP_ARM_OFF_LOGIC_DEEP = 1,
+};
+
+struct rockchip_pm_data {
+ const struct platform_suspend_ops *ops;
+ int (*init)(struct device_node *np);
+};
+
+static void __iomem *rk3288_bootram_base;
+static phys_addr_t rk3288_bootram_phy;
+
+static struct regmap *pmu_regmap;
+static struct regmap *sgrf_regmap;
+
+static u32 rk3288_pmu_pwr_mode_con;
+static u32 rk3288_sgrf_soc_con0;
+
+static inline u32 rk3288_l2_config(void)
+{
+ u32 l2ctlr;
+
+ asm("mrc p15, 1, %0, c9, c0, 2" : "=r" (l2ctlr));
+ return l2ctlr;
+}
+
+static void rk3288_config_bootdata(void)
+{
+ rkpm_bootdata_cpusp = rk3288_bootram_phy + (SZ_4K - 8);
+ rkpm_bootdata_cpu_code = virt_to_phys(cpu_resume);
+
+ rkpm_bootdata_l2ctlr_f = 1;
+ rkpm_bootdata_l2ctlr = rk3288_l2_config();
+}
+
+static void rk3288_slp_mode_set(int level)
+{
+ u32 mode_set, mode_set1;
+
+ regmap_read(sgrf_regmap, RK3288_SGRF_SOC_CON0, &rk3288_sgrf_soc_con0);
+
+ regmap_read(pmu_regmap, RK3288_PMU_PWRMODE_CON,
+ &rk3288_pmu_pwr_mode_con);
+
+ /* set bit 8 so that system will resume to FAST_BOOT_ADDR */
+ regmap_write(sgrf_regmap, RK3288_SGRF_SOC_CON0,
+ SGRF_FAST_BOOT_EN | SGRF_FAST_BOOT_EN_WRITE);
+
+ /* booting address of resuming system is from this register value */
+ regmap_write(sgrf_regmap, RK3288_SGRF_FAST_BOOT_ADDR,
+ rk3288_bootram_phy);
+
+ regmap_write(pmu_regmap, RK3288_PMU_WAKEUP_CFG1,
+ PMU_ARMINT_WAKEUP_EN);
+
+ mode_set = BIT(PMU_GLOBAL_INT_DISABLE) | BIT(PMU_L2FLUSH_EN) |
+ BIT(PMU_SREF0_ENTER_EN) | BIT(PMU_SREF1_ENTER_EN) |
+ BIT(PMU_DDR0_GATING_EN) | BIT(PMU_DDR1_GATING_EN) |
+ BIT(PMU_PWR_MODE_EN) | BIT(PMU_CHIP_PD_EN) |
+ BIT(PMU_SCU_EN);
+
+ mode_set1 = BIT(PMU_CLR_CORE) | BIT(PMU_CLR_CPUP);
+
+ if (level == ROCKCHIP_ARM_OFF_LOGIC_DEEP) {
+ /* arm off, logic deep sleep */
+ mode_set |= BIT(PMU_BUS_PD_EN) |
+ BIT(PMU_DDR1IO_RET_EN) | BIT(PMU_DDR0IO_RET_EN) |
+ BIT(PMU_OSC_24M_DIS) | BIT(PMU_PMU_USE_LF) |
+ BIT(PMU_ALIVE_USE_LF) | BIT(PMU_PLL_PD_EN);
+
+ mode_set1 |= BIT(PMU_CLR_ALIVE) | BIT(PMU_CLR_BUS) |
+ BIT(PMU_CLR_PERI) | BIT(PMU_CLR_DMA);
+ } else {
+ /*
+ * arm off, logic normal
+ * if pmu_clk_core_src_gate_en is not set,
+ * wakeup will be error
+ */
+ mode_set |= BIT(PMU_CLK_CORE_SRC_GATE_EN);
+ }
+
+ regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON, mode_set);
+ regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON1, mode_set1);
+}
+
+static void rk3288_slp_mode_set_resume(void)
+{
+ regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON,
+ rk3288_pmu_pwr_mode_con);
+
+ regmap_write(sgrf_regmap, RK3288_SGRF_SOC_CON0,
+ rk3288_sgrf_soc_con0 | SGRF_FAST_BOOT_EN_WRITE);
+}
+
+static int rockchip_lpmode_enter(unsigned long arg)
+{
+ flush_cache_all();
+
+ cpu_do_idle();
+
+ pr_err("%s: Failed to suspend\n", __func__);
+
+ return 1;
+}
+
+static int rk3288_suspend_enter(suspend_state_t state)
+{
+ local_fiq_disable();
+
+ rk3288_slp_mode_set(ROCKCHIP_ARM_OFF_LOGIC_NORMAL);
+
+ cpu_suspend(0, rockchip_lpmode_enter);
+
+ rk3288_slp_mode_set_resume();
+
+ local_fiq_enable();
+
+ return 0;
+}
+
+static int rk3288_suspend_prepare(void)
+{
+ return regulator_suspend_prepare(PM_SUSPEND_MEM);
+}
+
+static void rk3288_suspend_finish(void)
+{
+ if (regulator_suspend_finish())
+ pr_err("%s: Suspend finish failed\n", __func__);
+}
+
+static int rk3288_suspend_init(struct device_node *np)
+{
+ struct device_node *sram_np;
+ struct resource res;
+ int ret;
+
+ pmu_regmap = syscon_node_to_regmap(np);
+ if (IS_ERR(pmu_regmap)) {
+ pr_err("%s: could not find pmu regmap\n", __func__);
+ return PTR_ERR(pmu_regmap);
+ }
+
+ sgrf_regmap = syscon_regmap_lookup_by_compatible(
+ "rockchip,rk3288-sgrf");
+ if (IS_ERR(sgrf_regmap)) {
+ pr_err("%s: could not find sgrf regmap\n", __func__);
+ return PTR_ERR(pmu_regmap);
+ }
+
+ sram_np = of_find_compatible_node(NULL, NULL,
+ "rockchip,rk3288-pmu-sram");
+ if (!sram_np) {
+ pr_err("%s: could not find bootram dt node\n", __func__);
+ return -ENODEV;
+ }
+
+ rk3288_bootram_base = of_iomap(sram_np, 0);
+ if (!rk3288_bootram_base) {
+ pr_err("%s: could not map bootram base\n", __func__);
+ return -ENOMEM;
+ }
+
+ ret = of_address_to_resource(sram_np, 0, &res);
+ if (ret) {
+ pr_err("%s: could not get bootram phy addr\n", __func__);
+ return ret;
+ }
+ rk3288_bootram_phy = res.start;
+
+ of_node_put(sram_np);
+
+ rk3288_config_bootdata();
+
+ /* copy resume code and data to bootsram */
+ memcpy(rk3288_bootram_base, rockchip_slp_cpu_resume,
+ rk3288_bootram_sz);
+
+ return 0;
+}
+
+static const struct platform_suspend_ops rk3288_suspend_ops = {
+ .enter = rk3288_suspend_enter,
+ .valid = suspend_valid_only_mem,
+ .prepare = rk3288_suspend_prepare,
+ .finish = rk3288_suspend_finish,
+};
+
+static const struct rockchip_pm_data rk3288_pm_data __initconst = {
+ .ops = &rk3288_suspend_ops,
+ .init = rk3288_suspend_init,
+};
+
+static const struct of_device_id rockchip_pmu_of_device_ids[] __initconst = {
+ {
+ .compatible = "rockchip,rk3288-pmu",
+ .data = &rk3288_pm_data,
+ },
+ { /* sentinel */ },
+};
+
+void __init rockchip_suspend_init(void)
+{
+ const struct rockchip_pm_data *pm_data;
+ const struct of_device_id *match;
+ struct device_node *np;
+ int ret;
+
+ np = of_find_matching_node_and_match(NULL, rockchip_pmu_of_device_ids,
+ &match);
+ if (!match) {
+ pr_err("Failed to find PMU node\n");
+ return;
+ }
+ pm_data = (struct rockchip_pm_data *) match->data;
+
+ if (pm_data->init) {
+ ret = pm_data->init(np);
+
+ if (ret) {
+ pr_err("%s: matches init error %d\n", __func__, ret);
+ return;
+ }
+ }
+
+ suspend_set_ops(pm_data->ops);
+}
diff --git a/arch/arm/mach-rockchip/pm.h b/arch/arm/mach-rockchip/pm.h
new file mode 100644
index 0000000..99722d0
--- /dev/null
+++ b/arch/arm/mach-rockchip/pm.h
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ * Author: Tony Xie <tony.xie@xxxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef __MACH_ROCKCHIP_PM_H
+#define __MACH_ROCKCHIP_PM_H
+
+extern unsigned long rkpm_bootdata_cpusp;
+extern unsigned long rkpm_bootdata_cpu_code;
+extern unsigned long rkpm_bootdata_l2ctlr_f;
+extern unsigned long rkpm_bootdata_l2ctlr;
+extern unsigned long rkpm_bootdata_ddr_code;
+extern unsigned long rkpm_bootdata_ddr_data;
+extern unsigned long rk3288_bootram_sz;
+
+void rockchip_slp_cpu_resume(void);
+void __init rockchip_suspend_init(void);
+
+/****** following is rk3288 defined **********/
+#define RK3288_PMU_WAKEUP_CFG0 0x00
+#define RK3288_PMU_WAKEUP_CFG1 0x04
+#define RK3288_PMU_PWRMODE_CON 0x18
+#define RK3288_PMU_OSC_CNT 0x20
+#define RK3288_PMU_PLL_CNT 0x24
+#define RK3288_PMU_STABL_CNT 0x28
+#define RK3288_PMU_DDR0IO_PWRON_CNT 0x2c
+#define RK3288_PMU_DDR1IO_PWRON_CNT 0x30
+#define RK3288_PMU_CORE_PWRDWN_CNT 0x34
+#define RK3288_PMU_CORE_PWRUP_CNT 0x38
+#define RK3288_PMU_GPU_PWRDWN_CNT 0x3c
+#define RK3288_PMU_GPU_PWRUP_CNT 0x40
+#define RK3288_PMU_WAKEUP_RST_CLR_CNT 0x44
+#define RK3288_PMU_PWRMODE_CON1 0x90
+
+#define RK3288_SGRF_SOC_CON0 (0x0000)
+#define RK3288_SGRF_FAST_BOOT_ADDR (0x0120)
+#define SGRF_FAST_BOOT_EN BIT(8)
+#define SGRF_FAST_BOOT_EN_WRITE BIT(24)
+
+#define RK3288_CRU_MODE_CON (0x50)
+#define RK3288_CRU_SEL0_CON (0x60)
+#define RK3288_CRU_SEL1_CON (0x64)
+#define RK3288_CRU_SEL10_CON (0x88)
+#define RK3288_CRU_SEL33_CON (0xe4)
+#define RK3288_CRU_SEL37_CON (0xf4)
+
+/* PMU_WAKEUP_CFG1 bits */
+#define PMU_ARMINT_WAKEUP_EN BIT(0)
+
+enum rk3288_pwr_mode_con {
+ PMU_PWR_MODE_EN = 0,
+ PMU_CLK_CORE_SRC_GATE_EN,
+ PMU_GLOBAL_INT_DISABLE,
+ PMU_L2FLUSH_EN,
+ PMU_BUS_PD_EN,
+ PMU_A12_0_PD_EN,
+ PMU_SCU_EN,
+ PMU_PLL_PD_EN,
+ PMU_CHIP_PD_EN, /* POWER OFF PIN ENABLE */
+ PMU_PWROFF_COMB,
+ PMU_ALIVE_USE_LF,
+ PMU_PMU_USE_LF,
+ PMU_OSC_24M_DIS,
+ PMU_INPUT_CLAMP_EN,
+ PMU_WAKEUP_RESET_EN,
+ PMU_SREF0_ENTER_EN,
+ PMU_SREF1_ENTER_EN,
+ PMU_DDR0IO_RET_EN,
+ PMU_DDR1IO_RET_EN,
+ PMU_DDR0_GATING_EN,
+ PMU_DDR1_GATING_EN,
+ PMU_DDR0IO_RET_DE_REQ,
+ PMU_DDR1IO_RET_DE_REQ
+};
+
+enum rk3288_pwr_mode_con1 {
+ PMU_CLR_BUS = 0,
+ PMU_CLR_CORE,
+ PMU_CLR_CPUP,
+ PMU_CLR_ALIVE,
+ PMU_CLR_DMA,
+ PMU_CLR_PERI,
+ PMU_CLR_GPU,
+ PMU_CLR_VIDEO,
+ PMU_CLR_HEVC,
+ PMU_CLR_VIO,
+};
+
+#endif /* __MACH_ROCKCHIP_PM_H */
diff --git a/arch/arm/mach-rockchip/rockchip.c b/arch/arm/mach-rockchip/rockchip.c
index d226b71..2b68a1a 100644
--- a/arch/arm/mach-rockchip/rockchip.c
+++ b/arch/arm/mach-rockchip/rockchip.c
@@ -23,9 +23,11 @@
#include <asm/mach/map.h>
#include <asm/hardware/cache-l2x0.h>
#include "core.h"
+#include "pm.h"
static void __init rockchip_dt_init(void)
{
+ rockchip_suspend_init();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
platform_device_register_simple("cpufreq-dt", 0, NULL, 0);
}
diff --git a/arch/arm/mach-rockchip/sleep.S b/arch/arm/mach-rockchip/sleep.S
new file mode 100644
index 0000000..2eec9a3
--- /dev/null
+++ b/arch/arm/mach-rockchip/sleep.S
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ * Author: Tony Xie <tony.xie@xxxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/memory.h>
+
+.data
+/*
+ * this code will be copied from
+ * ddr to sram for system resumeing.
+ * so it is ".data section".
+ */
+.align
+
+ENTRY(rockchip_slp_cpu_resume)
+ setmode PSR_I_BIT | PSR_F_BIT | SVC_MODE, r1 @ set svc, irqs off
+ mrc p15, 0, r1, c0, c0, 5
+ and r1, r1, #0xf
+ cmp r1, #0
+ /* olny cpu0 can continue to run, the others is halt here */
+ beq cpu0run
+secondary_loop:
+ wfe
+ b secondary_loop
+cpu0run:
+ ldr r3, rkpm_bootdata_l2ctlr_f
+ cmp r3, #0
+ beq sp_set
+ ldr r3, rkpm_bootdata_l2ctlr
+ mcr p15, 1, r3, c9, c0, 2
+sp_set:
+ ldr sp, rkpm_bootdata_cpusp
+ ldr r1, rkpm_bootdata_cpu_code
+ bx r1
+ENDPROC(rockchip_slp_cpu_resume)
+
+/* Parameters filled in by the kernel */
+
+/* Flag for whether to restore L2CTLR on resume */
+ .global rkpm_bootdata_l2ctlr_f
+rkpm_bootdata_l2ctlr_f:
+ .long 0
+
+/* Saved L2CTLR to restore on resume */
+ .global rkpm_bootdata_l2ctlr
+rkpm_bootdata_l2ctlr:
+ .long 0
+
+/* CPU resume SP addr */
+ .globl rkpm_bootdata_cpusp
+rkpm_bootdata_cpusp:
+ .long 0
+
+/* CPU resume function (physical address) */
+ .globl rkpm_bootdata_cpu_code
+rkpm_bootdata_cpu_code:
+ .long 0
+
+ENTRY(rk3288_bootram_sz)
+ .word . - rockchip_slp_cpu_resume
--
1.9.1
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