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// SPDX-License-Identifier: GPL-2.0
/*
* GXP doorbell interface.
*
* Copyright (C) 2020 Google LLC
*/
#include <linux/bitops.h>
#include "gxp-doorbell.h"
#include "gxp-internal.h"
#define GXP_DOORBELL_STRIDE (GXP_REG_DOORBELL_1_STATUS \
- GXP_REG_DOORBELL_0_STATUS)
void gxp_doorbell_enable_for_core(struct gxp_dev *gxp, u32 doorbell_num,
uint core)
{
u32 val;
/* Enable DOORBELL_NUM on requested core */
val = gxp_read_32(gxp, GXP_CORE_REG_COMMON_INT_MASK_0(core));
val |= BIT(doorbell_num);
gxp_write_32(gxp, GXP_CORE_REG_COMMON_INT_MASK_0(core), val);
}
void gxp_doorbell_set(struct gxp_dev *gxp, u32 doorbell_num)
{
uint offset = GXP_REG_DOORBELL_0_SET
+ (GXP_DOORBELL_STRIDE * doorbell_num);
gxp_write_32(gxp, offset, GXP_REG_DOORBELLS_SET_WRITEMASK);
}
void gxp_doorbell_clear(struct gxp_dev *gxp, u32 doorbell_num)
{
uint offset = GXP_REG_DOORBELL_0_CLEAR
+ (GXP_DOORBELL_STRIDE * doorbell_num);
gxp_write_32(gxp, offset, GXP_REG_DOORBELLS_CLEAR_WRITEMASK);
}
u32 gxp_doorbell_status(struct gxp_dev *gxp, u32 doorbell_num)
{
uint offset = GXP_REG_DOORBELL_0_STATUS
+ (GXP_DOORBELL_STRIDE * doorbell_num);
return gxp_read_32(gxp, offset);
}
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