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Linux/include/dt-bindings/mailbox/tegra186-hsp.h

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  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 define the types of shared mailbox supported based on data size.
 20  */
 21 #define TEGRA_HSP_MBOX_TYPE_SM_128BIT (1 << 8)
 22 
 23 /*
 24  * These defines represent the bit associated with the given master ID in the
 25  * doorbell registers.
 26  */
 27 #define TEGRA_HSP_DB_MASTER_CCPLEX 17
 28 #define TEGRA_HSP_DB_MASTER_BPMP 19
 29 
 30 /*
 31  * Shared mailboxes are unidirectional, so the direction needs to be specified
 32  * in the device tree.
 33  */
 34 #define TEGRA_HSP_SM_MASK 0x00ffffff
 35 #define TEGRA_HSP_SM_FLAG_RX (0 << 31)
 36 #define TEGRA_HSP_SM_FLAG_TX (1 << 31)
 37 
 38 #define TEGRA_HSP_SM_RX(x) (TEGRA_HSP_SM_FLAG_RX | ((x) & TEGRA_HSP_SM_MASK))
 39 #define TEGRA_HSP_SM_TX(x) (TEGRA_HSP_SM_FLAG_TX | ((x) & TEGRA_HSP_SM_MASK))
 40 
 41 #endif
 42 

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