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
37