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

   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