arch/x86/include/asm/intel_scu_ipc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_INTEL_SCU_IPC_H_
   3 #define  _ASM_X86_INTEL_SCU_IPC_H_
   4
   5 #include <linux/notifier.h>
   6
   7 #define IPCMSG_INDIRECT_READ    0x02
   8 #define IPCMSG_INDIRECT_WRITE   0x05
   9
  10 #define IPCMSG_COLD_OFF         0x80    /* Only for Tangier */
  11
  12 #define IPCMSG_WARM_RESET       0xF0
  13 #define IPCMSG_COLD_RESET       0xF1
  14 #define IPCMSG_SOFT_RESET       0xF2
  15 #define IPCMSG_COLD_BOOT        0xF3
  16
  17 #define IPCMSG_VRTC             0xFA     /* Set vRTC device */
  18         /* Command id associated with message IPCMSG_VRTC */
  19         #define IPC_CMD_VRTC_SETTIME      1 /* Set time */
  20         #define IPC_CMD_VRTC_SETALARM     2 /* Set alarm */
  21
  22 /* Read single register */
  23 int intel_scu_ipc_ioread8(u16 addr, u8 *data);
  24
  25 /* Read a vector */
  26 int intel_scu_ipc_readv(u16 *addr, u8 *data, int len);
  27
  28 /* Write single register */
  29 int intel_scu_ipc_iowrite8(u16 addr, u8 data);
  30
  31 /* Write a vector */
  32 int intel_scu_ipc_writev(u16 *addr, u8 *data, int len);
  33
  34 /* Update single register based on the mask */
  35 int intel_scu_ipc_update_register(u16 addr, u8 data, u8 mask);
  36
  37 /* Issue commands to the SCU with or without data */
  38 int intel_scu_ipc_simple_command(int cmd, int sub);
  39 int intel_scu_ipc_command(int cmd, int sub, u32 *in, int inlen,
  40                           u32 *out, int outlen);
  41
  42 extern struct blocking_notifier_head intel_scu_notifier;
  43
  44 static inline void intel_scu_notifier_add(struct notifier_block *nb)
  45 {
  46         blocking_notifier_chain_register(&intel_scu_notifier, nb);
  47 }
  48
  49 static inline void intel_scu_notifier_remove(struct notifier_block *nb)
  50 {
  51         blocking_notifier_chain_unregister(&intel_scu_notifier, nb);
  52 }
  53
  54 static inline int intel_scu_notifier_post(unsigned long v, void *p)
  55 {
  56         return blocking_notifier_call_chain(&intel_scu_notifier, v, p);
  57 }
  58
  59 #define         SCU_AVAILABLE           1
  60 #define         SCU_DOWN                2
  61
  62 #endif