ARM: rockchip: add suspend and resume for RK3288
It's a basic version of suspend and resume for rockchip, it only support RK3288 now. Signed-off-by: Tony Xie <xxx@rock-chips.com> Signed-off-by: Chris Zhong <zyw@rock-chips.com> Tested-by: Doug Anderson <dianders@chromium.org> Reviewed-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Chris Zhong
committed by
Heiko Stuebner
Heiko Stuebner
parent
97bf6af1f9
commit
9c1ec8e18c
260
arch/arm/mach-rockchip/pm.c
Normal file
260
arch/arm/mach-rockchip/pm.c
Normal file
@@ -0,0 +1,260 @@
|
||||
/*
|
||||
* Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
|
||||
* Author: Tony Xie <tony.xie@rock-chips.com>
|
||||
*
|
||||
* 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);
|
||||
}
|
||||
Reference in New Issue
Block a user