xref: /kernel/linux/linux-6.6/scripts/dtc/include-prefixes/dt-bindings/mailbox/tegra186-hsp.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * This header provides constants for binding nvidia,tegra186-hsp.
 */

#ifndef _DT_BINDINGS_MAILBOX_TEGRA186_HSP_H
#define _DT_BINDINGS_MAILBOX_TEGRA186_HSP_H

/*
 * These define the type of mailbox that is to be used (doorbell, shared
 * mailbox, shared semaphore or arbitrated semaphore).
 */
#define TEGRA_HSP_MBOX_TYPE_DB 0x0
#define TEGRA_HSP_MBOX_TYPE_SM 0x1
#define TEGRA_HSP_MBOX_TYPE_SS 0x2
#define TEGRA_HSP_MBOX_TYPE_AS 0x3

/*
 * These define the types of shared mailbox supported based on data size.
 */
#define TEGRA_HSP_MBOX_TYPE_SM_128BIT (1 << 8)

/*
 * These defines represent the bit associated with the given master ID in the
 * doorbell registers.
 */
#define TEGRA_HSP_DB_MASTER_CCPLEX 17
#define TEGRA_HSP_DB_MASTER_BPMP 19

/*
 * Shared mailboxes are unidirectional, so the direction needs to be specified
 * in the device tree.
 */
#define TEGRA_HSP_SM_MASK 0x00ffffff
#define TEGRA_HSP_SM_FLAG_RX (0 << 31)
#define TEGRA_HSP_SM_FLAG_TX (1 << 31)

#define TEGRA_HSP_SM_RX(x) (TEGRA_HSP_SM_FLAG_RX | ((x) & TEGRA_HSP_SM_MASK))
#define TEGRA_HSP_SM_TX(x) (TEGRA_HSP_SM_FLAG_TX | ((x) & TEGRA_HSP_SM_MASK))

#endif