1 files changed, 150 insertions, 0 deletions
diff --git a/drivers/staging/ccree/ssi_pm.c b/drivers/staging/ccree/ssi_pm.c
new file mode 100644
index 0000000..dd399f2
--- /dev/null
+++ b/drivers/staging/ccree/ssi_pm.c
@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2012-2017 ARM Limited or its affiliates.
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ * 
+ * This program is distributed in the hope that 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.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "ssi_config.h"
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <crypto/ctr.h>
+#include <linux/pm_runtime.h>
+#include "ssi_driver.h"
+#include "ssi_buffer_mgr.h"
+#include "ssi_request_mgr.h"
+#include "ssi_sram_mgr.h"
+#include "ssi_sysfs.h"
+#include "ssi_ivgen.h"
+#include "ssi_hash.h"
+#include "ssi_pm.h"
+#include "ssi_pm_ext.h"
+
+
+#if defined (CONFIG_PM_RUNTIME) || defined (CONFIG_PM_SLEEP)
+
+#define POWER_DOWN_ENABLE 0x01
+#define POWER_DOWN_DISABLE 0x00
+
+
+int ssi_power_mgr_runtime_suspend(struct device *dev)
+{
+	struct ssi_drvdata *drvdata =
+		(struct ssi_drvdata *)dev_get_drvdata(dev);
+	int rc;
+
+	SSI_LOG_DEBUG("ssi_power_mgr_runtime_suspend: set HOST_POWER_DOWN_EN\n");
+	WRITE_REGISTER(drvdata->cc_base + CC_REG_OFFSET(HOST_RGF, HOST_POWER_DOWN_EN), POWER_DOWN_ENABLE);
+	rc = ssi_request_mgr_runtime_suspend_queue(drvdata);
+	if (rc != 0) {
+		SSI_LOG_ERR("ssi_request_mgr_runtime_suspend_queue (%x)\n", rc);
+		return rc;
+	}
+	fini_cc_regs(drvdata);
+
+	/* Specific HW suspend code */
+	ssi_pm_ext_hw_suspend(dev);
+	return 0;
+}
+
+int ssi_power_mgr_runtime_resume(struct device *dev)
+{
+	int rc;
+	struct ssi_drvdata *drvdata =
+		(struct ssi_drvdata *)dev_get_drvdata(dev);
+
+	SSI_LOG_DEBUG("ssi_power_mgr_runtime_resume , unset HOST_POWER_DOWN_EN\n");
+	WRITE_REGISTER(drvdata->cc_base + CC_REG_OFFSET(HOST_RGF, HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE);
+	/* Specific HW resume code */
+	ssi_pm_ext_hw_resume(dev);
+
+	rc = init_cc_regs(drvdata, false);
+	if (rc !=0) {
+		SSI_LOG_ERR("init_cc_regs (%x)\n",rc);
+		return rc;
+	}
+
+	rc = ssi_request_mgr_runtime_resume_queue(drvdata);
+	if (rc !=0) {
+		SSI_LOG_ERR("ssi_request_mgr_runtime_resume_queue (%x)\n",rc);
+		return rc;
+	}
+
+	/* must be after the queue resuming as it uses the HW queue*/
+	ssi_hash_init_sram_digest_consts(drvdata);
+	
+	ssi_ivgen_init_sram_pool(drvdata);
+	return 0;
+}
+
+int ssi_power_mgr_runtime_get(struct device *dev)
+{
+	int rc = 0;
+
+	if (ssi_request_mgr_is_queue_runtime_suspend(
+				(struct ssi_drvdata *)dev_get_drvdata(dev))) {
+		rc = pm_runtime_get_sync(dev);
+	} else {
+		pm_runtime_get_noresume(dev);
+	}
+	return rc;
+}
+
+int ssi_power_mgr_runtime_put_suspend(struct device *dev)
+{
+	int rc = 0;
+
+	if (!ssi_request_mgr_is_queue_runtime_suspend(
+				(struct ssi_drvdata *)dev_get_drvdata(dev))) {
+		pm_runtime_mark_last_busy(dev);
+		rc = pm_runtime_put_autosuspend(dev);
+	}
+	else {
+		/* Something wrong happens*/
+		BUG();
+	}
+	return rc;
+
+}
+
+#endif
+
+
+
+int ssi_power_mgr_init(struct ssi_drvdata *drvdata)
+{
+	int rc = 0;
+#if defined (CONFIG_PM_RUNTIME) || defined (CONFIG_PM_SLEEP)
+	struct platform_device *plat_dev = drvdata->plat_dev;
+	/* must be before the enabling to avoid resdundent suspending */
+	pm_runtime_set_autosuspend_delay(&plat_dev->dev,SSI_SUSPEND_TIMEOUT);
+	pm_runtime_use_autosuspend(&plat_dev->dev);
+	/* activate the PM module */
+	rc = pm_runtime_set_active(&plat_dev->dev);
+	if (rc != 0)
+		return rc;
+	/* enable the PM module*/
+	pm_runtime_enable(&plat_dev->dev);
+#endif
+	return rc;
+}
+
+void ssi_power_mgr_fini(struct ssi_drvdata *drvdata)
+{
+#if defined (CONFIG_PM_RUNTIME) || defined (CONFIG_PM_SLEEP)
+	struct platform_device *plat_dev = drvdata->plat_dev;
+
+	pm_runtime_disable(&plat_dev->dev);
+#endif
+}