Commit 41d9d44d authored by Dave Gerlach's avatar Dave Gerlach Committed by Tony Lindgren

ARM: OMAP2+: pm33xx-core: Add platform code needed for PM

Most of the PM code needed for am335x and am437x can be moved into a
module under drivers but some core code must remain in mach-omap2 at the
moment. This includes some internal clockdomain APIs and low-level ARM
APIs which are also not exported for use by modules.

Implement a few functions that handle these low-level platform
operations can be passed to the pm33xx module through the use of
platform data.

In addition to this, to be able to share data structures between C and
the sleep33xx and sleep43xx assembly code, we can automatically generate
all of the C struct member offsets and sizes as macros by processing
pm-asm-offsets.c into assembly code and then extracting the relevant
data as is done for the generated platform asm-offsets.h files.

Finally, add amx3_common_pm_init to create a dummy platform_device for
pm33xx so that our soon to be introduced pm33xx module can probe on
am335x and am437x platforms to enable basic suspend to mem and standby
support.
Signed-off-by: default avatarDave Gerlach <d-gerlach@ti.com>
Acked-by: default avatarSantosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 41d37e61
......@@ -72,6 +72,7 @@ config SOC_AM43XX
select ARM_ERRATA_754322
select ARM_ERRATA_775420
select OMAP_INTERCONNECT
select ARM_CPU_SUSPEND if PM
config SOC_DRA7XX
bool "TI DRA7XX"
......
......@@ -88,6 +88,8 @@ omap-4-5-pm-common += pm44xx.o
obj-$(CONFIG_ARCH_OMAP4) += $(omap-4-5-pm-common)
obj-$(CONFIG_SOC_OMAP5) += $(omap-4-5-pm-common)
obj-$(CONFIG_SOC_DRA7XX) += $(omap-4-5-pm-common)
obj-$(CONFIG_SOC_AM33XX) += pm33xx-core.o sleep33xx.o
obj-$(CONFIG_SOC_AM43XX) += pm33xx-core.o sleep43xx.o
obj-$(CONFIG_PM_DEBUG) += pm-debug.o
obj-$(CONFIG_POWER_AVS_OMAP) += sr_device.o
......@@ -95,6 +97,8 @@ obj-$(CONFIG_POWER_AVS_OMAP_CLASS3) += smartreflex-class3.o
AFLAGS_sleep24xx.o :=-Wa,-march=armv6
AFLAGS_sleep34xx.o :=-Wa,-march=armv7-a$(plus_sec)
AFLAGS_sleep33xx.o :=-Wa,-march=armv7-a$(plus_sec)
AFLAGS_sleep43xx.o :=-Wa,-march=armv7-a$(plus_sec)
endif
......@@ -232,3 +236,15 @@ obj-y += $(omap-hsmmc-m) $(omap-hsmmc-y)
obj-y += omap_phy_internal.o
obj-$(CONFIG_MACH_OMAP2_TUSB6010) += usb-tusb6010.o
arch/arm/mach-omap2/pm-asm-offsets.s: arch/arm/mach-omap2/pm-asm-offsets.c
$(call if_changed_dep,cc_s_c)
include/generated/ti-pm-asm-offsets.h: arch/arm/mach-omap2/pm-asm-offsets.s FORCE
$(call filechk,offsets,__TI_PM_ASM_OFFSETS_H__)
# For rule to generate ti-emif-asm-offsets.h dependency
include drivers/memory/Makefile.asm-offsets
arch/arm/mach-omap2/sleep33xx.o: include/generated/ti-pm-asm-offsets.h include/generated/ti-emif-asm-offsets.h
arch/arm/mach-omap2/sleep43xx.o: include/generated/ti-pm-asm-offsets.h include/generated/ti-emif-asm-offsets.h
......@@ -77,6 +77,13 @@ static inline int omap4_pm_init_early(void)
}
#endif
#if defined(CONFIG_PM) && (defined(CONFIG_SOC_AM33XX) || \
defined(CONFIG_SOC_AM43XX))
void amx3_common_pm_init(void);
#else
static inline void amx3_common_pm_init(void) { }
#endif
extern void omap2_init_common_infrastructure(void);
extern void omap_init_time(void);
......
......@@ -622,6 +622,7 @@ void __init am33xx_init_early(void)
void __init am33xx_init_late(void)
{
omap_common_late_init();
amx3_common_pm_init();
}
#endif
......@@ -646,6 +647,7 @@ void __init am43xx_init_late(void)
{
omap_common_late_init();
omap2_clk_enable_autoidle_all();
amx3_common_pm_init();
}
#endif
......
// SPDX-License-Identifier: GPL-2.0
/*
* TI AM33XX and AM43XX PM Assembly Offsets
*
* Copyright (C) 2017-2018 Texas Instruments Inc.
*/
#include <linux/kbuild.h>
#include <linux/platform_data/pm33xx.h>
int main(void)
{
DEFINE(AMX3_PM_WFI_FLAGS_OFFSET,
offsetof(struct am33xx_pm_sram_data, wfi_flags));
DEFINE(AMX3_PM_L2_AUX_CTRL_VAL_OFFSET,
offsetof(struct am33xx_pm_sram_data, l2_aux_ctrl_val));
DEFINE(AMX3_PM_L2_PREFETCH_CTRL_VAL_OFFSET,
offsetof(struct am33xx_pm_sram_data, l2_prefetch_ctrl_val));
DEFINE(AMX3_PM_SRAM_DATA_SIZE, sizeof(struct am33xx_pm_sram_data));
BLANK();
DEFINE(AMX3_PM_RO_SRAM_DATA_VIRT_OFFSET,
offsetof(struct am33xx_pm_ro_sram_data, amx3_pm_sram_data_virt));
DEFINE(AMX3_PM_RO_SRAM_DATA_PHYS_OFFSET,
offsetof(struct am33xx_pm_ro_sram_data, amx3_pm_sram_data_phys));
DEFINE(AMX3_PM_RO_SRAM_DATA_SIZE,
sizeof(struct am33xx_pm_ro_sram_data));
return 0;
}
......@@ -81,6 +81,9 @@ extern unsigned int omap3_do_wfi_sz;
/* ... and its pointer from SRAM after copy */
extern void (*omap3_do_wfi_sram)(void);
extern struct am33xx_pm_sram_addr am33xx_pm_sram;
extern struct am33xx_pm_sram_addr am43xx_pm_sram;
extern void omap3_save_scratchpad_contents(void);
#define PM_RTA_ERRATUM_i608 (1 << 0)
......
// SPDX-License-Identifier: GPL-2.0
/*
* AM33XX Arch Power Management Routines
*
* Copyright (C) 2016-2018 Texas Instruments Incorporated - http://www.ti.com/
* Dave Gerlach
*/
#include <asm/smp_scu.h>
#include <asm/suspend.h>
#include <linux/errno.h>
#include <linux/platform_data/pm33xx.h>
#include "cm33xx.h"
#include "common.h"
#include "control.h"
#include "clockdomain.h"
#include "iomap.h"
#include "omap_hwmod.h"
#include "pm.h"
#include "powerdomain.h"
#include "prm33xx.h"
#include "soc.h"
#include "sram.h"
static struct powerdomain *cefuse_pwrdm, *gfx_pwrdm, *per_pwrdm, *mpu_pwrdm;
static struct clockdomain *gfx_l4ls_clkdm;
static void __iomem *scu_base;
static int __init am43xx_map_scu(void)
{
scu_base = ioremap(scu_a9_get_base(), SZ_256);
if (!scu_base)
return -ENOMEM;
return 0;
}
static int amx3_common_init(void)
{
gfx_pwrdm = pwrdm_lookup("gfx_pwrdm");
per_pwrdm = pwrdm_lookup("per_pwrdm");
mpu_pwrdm = pwrdm_lookup("mpu_pwrdm");
if ((!gfx_pwrdm) || (!per_pwrdm) || (!mpu_pwrdm))
return -ENODEV;
(void)clkdm_for_each(omap_pm_clkdms_setup, NULL);
/* CEFUSE domain can be turned off post bootup */
cefuse_pwrdm = pwrdm_lookup("cefuse_pwrdm");
if (cefuse_pwrdm)
omap_set_pwrdm_state(cefuse_pwrdm, PWRDM_POWER_OFF);
else
pr_err("PM: Failed to get cefuse_pwrdm\n");
return 0;
}
static int am33xx_suspend_init(void)
{
int ret;
gfx_l4ls_clkdm = clkdm_lookup("gfx_l4ls_gfx_clkdm");
if (!gfx_l4ls_clkdm) {
pr_err("PM: Cannot lookup gfx_l4ls_clkdm clockdomains\n");
return -ENODEV;
}
ret = amx3_common_init();
return ret;
}
static int am43xx_suspend_init(void)
{
int ret = 0;
ret = am43xx_map_scu();
if (ret) {
pr_err("PM: Could not ioremap SCU\n");
return ret;
}
ret = amx3_common_init();
return ret;
}
static void amx3_pre_suspend_common(void)
{
omap_set_pwrdm_state(gfx_pwrdm, PWRDM_POWER_OFF);
}
static void amx3_post_suspend_common(void)
{
int status;
/*
* Because gfx_pwrdm is the only one under MPU control,
* comment on transition status
*/
status = pwrdm_read_pwrst(gfx_pwrdm);
if (status != PWRDM_POWER_OFF)
pr_err("PM: GFX domain did not transition: %x\n", status);
}
static int am33xx_suspend(unsigned int state, int (*fn)(unsigned long))
{
int ret = 0;
amx3_pre_suspend_common();
ret = cpu_suspend(0, fn);
amx3_post_suspend_common();
/*
* BUG: GFX_L4LS clock domain needs to be woken up to
* ensure thet L4LS clock domain does not get stuck in
* transition. If that happens L3 module does not get
* disabled, thereby leading to PER power domain
* transition failing
*/
clkdm_wakeup(gfx_l4ls_clkdm);
clkdm_sleep(gfx_l4ls_clkdm);
return ret;
}
static int am43xx_suspend(unsigned int state, int (*fn)(unsigned long))
{
int ret = 0;
amx3_pre_suspend_common();
scu_power_mode(scu_base, SCU_PM_POWEROFF);
ret = cpu_suspend(0, fn);
scu_power_mode(scu_base, SCU_PM_NORMAL);
amx3_post_suspend_common();
return ret;
}
static struct am33xx_pm_sram_addr *amx3_get_sram_addrs(void)
{
if (soc_is_am33xx())
return &am33xx_pm_sram;
else if (soc_is_am437x())
return &am43xx_pm_sram;
else
return NULL;
}
static struct am33xx_pm_platform_data am33xx_ops = {
.init = am33xx_suspend_init,
.soc_suspend = am33xx_suspend,
.get_sram_addrs = amx3_get_sram_addrs,
};
static struct am33xx_pm_platform_data am43xx_ops = {
.init = am43xx_suspend_init,
.soc_suspend = am43xx_suspend,
.get_sram_addrs = amx3_get_sram_addrs,
};
static struct am33xx_pm_platform_data *am33xx_pm_get_pdata(void)
{
if (soc_is_am33xx())
return &am33xx_ops;
else if (soc_is_am437x())
return &am43xx_ops;
else
return NULL;
}
void __init amx3_common_pm_init(void)
{
struct am33xx_pm_platform_data *pdata;
struct platform_device_info devinfo;
pdata = am33xx_pm_get_pdata();
memset(&devinfo, 0, sizeof(devinfo));
devinfo.name = "pm33xx";
devinfo.data = pdata;
devinfo.size_data = sizeof(*pdata);
devinfo.id = -1;
platform_device_register_full(&devinfo);
}
......@@ -6,6 +6,8 @@
* Dave Gerlach, Vaibhav Bedia
*/
#include <generated/ti-emif-asm-offsets.h>
#include <generated/ti-pm-asm-offsets.h>
#include <linux/linkage.h>
#include <linux/ti-emif-sram.h>
#include <asm/assembler.h>
......
......@@ -6,6 +6,8 @@
* Dave Gerlach, Vaibhav Bedia
*/
#include <generated/ti-emif-asm-offsets.h>
#include <generated/ti-pm-asm-offsets.h>
#include <linux/linkage.h>
#include <linux/ti-emif-sram.h>
......
/* SPDX-License-Identifier: GPL-2.0 */
/*
* TI pm33xx platform data
*
* Copyright (C) 2016-2018 Texas Instruments, Inc.
* Dave Gerlach <d-gerlach@ti.com>
*/
#ifndef _LINUX_PLATFORM_DATA_PM33XX_H
#define _LINUX_PLATFORM_DATA_PM33XX_H
#include <linux/kbuild.h>
#include <linux/types.h>
#ifndef __ASSEMBLER__
struct am33xx_pm_sram_addr {
void (*do_wfi)(void);
unsigned long *do_wfi_sz;
unsigned long *resume_offset;
unsigned long *emif_sram_table;
unsigned long *ro_sram_data;
};
struct am33xx_pm_platform_data {
int (*init)(void);
int (*soc_suspend)(unsigned int state, int (*fn)(unsigned long));
struct am33xx_pm_sram_addr *(*get_sram_addrs)(void);
};
struct am33xx_pm_sram_data {
u32 wfi_flags;
u32 l2_aux_ctrl_val;
u32 l2_prefetch_ctrl_val;
} __packed __aligned(8);
struct am33xx_pm_ro_sram_data {
u32 amx3_pm_sram_data_virt;
u32 amx3_pm_sram_data_phys;
} __packed __aligned(8);
#endif /* __ASSEMBLER__ */
#endif /* _LINUX_PLATFORM_DATA_PM33XX_H */
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