linux_kernel/arch/x86/include/asm/intel_scu_ipc.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_INTEL_SCU_IPC_H_
#define  _ASM_X86_INTEL_SCU_IPC_H_

#include <linux/notifier.h>

#define IPCMSG_INDIRECT_READ	0x02
#define IPCMSG_INDIRECT_WRITE	0x05

#define IPCMSG_COLD_OFF		0x80	/* Only for Tangier */

#define IPCMSG_WARM_RESET	0xF0
#define IPCMSG_COLD_RESET	0xF1
#define IPCMSG_SOFT_RESET	0xF2
#define IPCMSG_COLD_BOOT	0xF3

#define IPCMSG_VRTC		0xFA	 /* Set vRTC device */
	/* Command id associated with message IPCMSG_VRTC */
	#define IPC_CMD_VRTC_SETTIME      1 /* Set time */
	#define IPC_CMD_VRTC_SETALARM     2 /* Set alarm */

/* Read single register */
int intel_scu_ipc_ioread8(u16 addr, u8 *data);

/* Read two sequential registers */
int intel_scu_ipc_ioread16(u16 addr, u16 *data);

/* Read four sequential registers */
int intel_scu_ipc_ioread32(u16 addr, u32 *data);

/* Read a vector */
int intel_scu_ipc_readv(u16 *addr, u8 *data, int len);

/* Write single register */
int intel_scu_ipc_iowrite8(u16 addr, u8 data);

/* Write two sequential registers */
int intel_scu_ipc_iowrite16(u16 addr, u16 data);

/* Write four sequential registers */
int intel_scu_ipc_iowrite32(u16 addr, u32 data);

/* Write a vector */
int intel_scu_ipc_writev(u16 *addr, u8 *data, int len);

/* Update single register based on the mask */
int intel_scu_ipc_update_register(u16 addr, u8 data, u8 mask);

/* Issue commands to the SCU with or without data */
int intel_scu_ipc_simple_command(int cmd, int sub);
int intel_scu_ipc_command(int cmd, int sub, u32 *in, int inlen,
			  u32 *out, int outlen);
int intel_scu_ipc_raw_command(int cmd, int sub, u8 *in, int inlen,
			      u32 *out, int outlen, u32 dptr, u32 sptr);

/* I2C control api */
int intel_scu_ipc_i2c_cntrl(u32 addr, u32 *data);

/* Update FW version */
int intel_scu_ipc_fw_update(u8 *buffer, u32 length);

extern struct blocking_notifier_head intel_scu_notifier;

static inline void intel_scu_notifier_add(struct notifier_block *nb)
{
	blocking_notifier_chain_register(&intel_scu_notifier, nb);
}

static inline void intel_scu_notifier_remove(struct notifier_block *nb)
{
	blocking_notifier_chain_unregister(&intel_scu_notifier, nb);
}

static inline int intel_scu_notifier_post(unsigned long v, void *p)
{
	return blocking_notifier_call_chain(&intel_scu_notifier, v, p);
}

#define		SCU_AVAILABLE		1
#define		SCU_DOWN		2

#endif