63893811b0
Add CryptoCell async. hash and HMAC support. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
123 lines
2.6 KiB
C
123 lines
2.6 KiB
C
// 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"
|
|
|
|
#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);
|
|
int rc;
|
|
|
|
dev_dbg(dev, "set HOST_POWER_DOWN_EN\n");
|
|
cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_ENABLE);
|
|
rc = cc_suspend_req_queue(drvdata);
|
|
if (rc) {
|
|
dev_err(dev, "cc_suspend_req_queue (%x)\n", rc);
|
|
return rc;
|
|
}
|
|
fini_cc_regs(drvdata);
|
|
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");
|
|
cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE);
|
|
|
|
rc = cc_clk_on(drvdata);
|
|
if (rc) {
|
|
dev_err(dev, "failed getting clock back on. We're toast.\n");
|
|
return rc;
|
|
}
|
|
|
|
rc = init_cc_regs(drvdata, false);
|
|
if (rc) {
|
|
dev_err(dev, "init_cc_regs (%x)\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
rc = cc_resume_req_queue(drvdata);
|
|
if (rc) {
|
|
dev_err(dev, "cc_resume_req_queue (%x)\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
/* must be after the queue resuming as it uses the HW queue*/
|
|
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 (cc_req_queue_suspended(drvdata))
|
|
rc = pm_runtime_get_sync(dev);
|
|
else
|
|
pm_runtime_get_noresume(dev);
|
|
|
|
return rc;
|
|
}
|
|
|
|
int cc_pm_put_suspend(struct device *dev)
|
|
{
|
|
int rc = 0;
|
|
struct cc_drvdata *drvdata = dev_get_drvdata(dev);
|
|
|
|
if (!cc_req_queue_suspended(drvdata)) {
|
|
pm_runtime_mark_last_busy(dev);
|
|
rc = pm_runtime_put_autosuspend(dev);
|
|
} else {
|
|
/* Something wrong happens*/
|
|
dev_err(dev, "request to suspend already suspended queue");
|
|
rc = -EBUSY;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int cc_pm_init(struct cc_drvdata *drvdata)
|
|
{
|
|
int rc = 0;
|
|
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);
|
|
/* activate the PM module */
|
|
rc = pm_runtime_set_active(dev);
|
|
if (rc)
|
|
return rc;
|
|
/* enable the PM module*/
|
|
pm_runtime_enable(dev);
|
|
|
|
return rc;
|
|
}
|
|
|
|
void cc_pm_fini(struct cc_drvdata *drvdata)
|
|
{
|
|
pm_runtime_disable(drvdata_to_dev(drvdata));
|
|
}
|