u-boot/arch/x86/include/asm/scu.h
Georgii Staroselskii 224742a390 x86: cpu: introduce scu_ipc_raw_command()
This interface will be used to configure properly some pins on
Merrifield that are shared with SCU.

scu_ipc_raw_command() writes SPTR and DPTR registers before sending
a command to SCU.

This code has been ported from Linux work done by Andy Shevchenko.

Signed-off-by: Georgii Staroselskii <georgii.staroselskii@emlid.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2018-09-17 14:34:15 +08:00

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C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2017 Intel Corporation
*/
#ifndef _X86_ASM_SCU_IPC_H_
#define _X86_ASM_SCU_IPC_H_
/* IPC defines the following message types */
#define IPCMSG_INDIRECT_READ 0x02
#define IPCMSG_INDIRECT_WRITE 0x05
#define IPCMSG_WARM_RESET 0xf0
#define IPCMSG_COLD_RESET 0xf1
#define IPCMSG_SOFT_RESET 0xf2
#define IPCMSG_COLD_BOOT 0xf3
#define IPCMSG_GET_FW_REVISION 0xf4
#define IPCMSG_WATCHDOG_TIMER 0xf8 /* Set Kernel Watchdog Threshold */
struct ipc_ifwi_version {
u16 minor;
u8 major;
u8 hardware_id;
u32 reserved[3];
};
/* Issue commands to the SCU with or without data */
int scu_ipc_simple_command(u32 cmd, u32 sub);
int scu_ipc_command(u32 cmd, u32 sub, u32 *in, int inlen, u32 *out, int outlen);
int scu_ipc_raw_command(u32 cmd, u32 sub, u32 *in, int inlen, u32 *out,
int outlen, u32 dptr, u32 sptr);
#endif /* _X86_ASM_SCU_IPC_H_ */