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 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