109 lines
2.4 KiB
C
Executable file
109 lines
2.4 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (C) 2012-2018 ARM Limited or its affiliates. */
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include "cc_driver.h"
|
|
#include "cc_buffer_mgr.h"
|
|
#include "cc_request_mgr.h"
|
|
#include "cc_sram_mgr.h"
|
|
#include "cc_ivgen.h"
|
|
#include "cc_hash.h"
|
|
#include "cc_pm.h"
|
|
#include "cc_fips.h"
|
|
|
|
#define POWER_DOWN_ENABLE 0x01
|
|
#define POWER_DOWN_DISABLE 0x00
|
|
|
|
const struct dev_pm_ops ccree_pm = {
|
|
SET_RUNTIME_PM_OPS(cc_pm_suspend, cc_pm_resume, NULL)
|
|
};
|
|
|
|
int cc_pm_suspend(struct device *dev)
|
|
{
|
|
struct cc_drvdata *drvdata = dev_get_drvdata(dev);
|
|
|
|
dev_dbg(dev, "set HOST_POWER_DOWN_EN\n");
|
|
fini_cc_regs(drvdata);
|
|
cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_ENABLE);
|
|
cc_clk_off(drvdata);
|
|
return 0;
|
|
}
|
|
|
|
int cc_pm_resume(struct device *dev)
|
|
{
|
|
int rc;
|
|
struct cc_drvdata *drvdata = dev_get_drvdata(dev);
|
|
|
|
dev_dbg(dev, "unset HOST_POWER_DOWN_EN\n");
|
|
/* Enables the device source clk */
|
|
rc = cc_clk_on(drvdata);
|
|
if (rc) {
|
|
dev_err(dev, "failed getting clock back on. We're toast.\n");
|
|
return rc;
|
|
}
|
|
|
|
cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE);
|
|
rc = init_cc_regs(drvdata, false);
|
|
if (rc) {
|
|
dev_err(dev, "init_cc_regs (%x)\n", rc);
|
|
return rc;
|
|
}
|
|
/* check if tee fips error occurred during power down */
|
|
cc_tee_handle_fips_error(drvdata);
|
|
|
|
cc_init_hash_sram(drvdata);
|
|
|
|
cc_init_iv_sram(drvdata);
|
|
return 0;
|
|
}
|
|
|
|
int cc_pm_get(struct device *dev)
|
|
{
|
|
int rc = 0;
|
|
struct cc_drvdata *drvdata = dev_get_drvdata(dev);
|
|
|
|
if (drvdata->pm_on)
|
|
rc = pm_runtime_get_sync(dev);
|
|
|
|
return (rc == 1 ? 0 : rc);
|
|
}
|
|
|
|
int cc_pm_put_suspend(struct device *dev)
|
|
{
|
|
int rc = 0;
|
|
struct cc_drvdata *drvdata = dev_get_drvdata(dev);
|
|
|
|
if (drvdata->pm_on) {
|
|
pm_runtime_mark_last_busy(dev);
|
|
rc = pm_runtime_put_autosuspend(dev);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
int cc_pm_init(struct cc_drvdata *drvdata)
|
|
{
|
|
struct device *dev = drvdata_to_dev(drvdata);
|
|
|
|
/* must be before the enabling to avoid resdundent suspending */
|
|
pm_runtime_set_autosuspend_delay(dev, CC_SUSPEND_TIMEOUT);
|
|
pm_runtime_use_autosuspend(dev);
|
|
/* set us as active - note we won't do PM ops until cc_pm_go()! */
|
|
return pm_runtime_set_active(dev);
|
|
}
|
|
|
|
/* enable the PM module*/
|
|
void cc_pm_go(struct cc_drvdata *drvdata)
|
|
{
|
|
pm_runtime_enable(drvdata_to_dev(drvdata));
|
|
drvdata->pm_on = true;
|
|
}
|
|
|
|
void cc_pm_fini(struct cc_drvdata *drvdata)
|
|
{
|
|
pm_runtime_disable(drvdata_to_dev(drvdata));
|
|
drvdata->pm_on = false;
|
|
}
|