1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * This header provides constants for binding nvidia,tegra186-hsp.
 4 */
 5
 6#ifndef _DT_BINDINGS_MAILBOX_TEGRA186_HSP_H
 7#define _DT_BINDINGS_MAILBOX_TEGRA186_HSP_H
 8
 9/*
10 * These define the type of mailbox that is to be used (doorbell, shared
11 * mailbox, shared semaphore or arbitrated semaphore).
12 */
13#define TEGRA_HSP_MBOX_TYPE_DB 0x0
14#define TEGRA_HSP_MBOX_TYPE_SM 0x1
15#define TEGRA_HSP_MBOX_TYPE_SS 0x2
16#define TEGRA_HSP_MBOX_TYPE_AS 0x3
17
18/*
19 * These defines represent the bit associated with the given master ID in the
20 * doorbell registers.
21 */
22#define TEGRA_HSP_DB_MASTER_CCPLEX 17
23#define TEGRA_HSP_DB_MASTER_BPMP 19
24
25/*
26 * Shared mailboxes are unidirectional, so the direction needs to be specified
27 * in the device tree.
28 */
29#define TEGRA_HSP_SM_MASK 0x00ffffff
30#define TEGRA_HSP_SM_FLAG_RX (0 << 31)
31#define TEGRA_HSP_SM_FLAG_TX (1 << 31)
32
33#define TEGRA_HSP_SM_RX(x) (TEGRA_HSP_SM_FLAG_RX | ((x) & TEGRA_HSP_SM_MASK))
34#define TEGRA_HSP_SM_TX(x) (TEGRA_HSP_SM_FLAG_TX | ((x) & TEGRA_HSP_SM_MASK))
35
36#endif