smbus.h

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#ifndef HUDSON_SMBUS_H
#define HUDSON_SMBUS_H
 
#include <stdint.h>
 
#define SMBHSTSTAT              0x0
#define SMBSLVSTAT              0x1
#define SMBHSTCTRL              0x2
#define SMBHSTCMD               0x3
#define SMBHSTADDR              0x4
#define SMBHSTDAT0              0x5
#define SMBHSTDAT1              0x6
#define SMBHSTBLKDAT            0x7
 
#define SMBSLVCTRL              0x8
#define SMBSLVCMD_SHADOW        0x9
#define SMBSLVEVT               0xa
#define SMBSLVDAT               0xc
 
#define AX_INDXC                0
#define AX_INDXP                2
#define AXCFG                   4
#define ABCFG                   6
#define RC_INDXC                1
#define RC_INDXP                3
 
#define AB_INDX                 0xcd8
#define AB_DATA                 (AB_INDX + 4)
 
/* Between 1-10 seconds, We should never timeout normally
 * Longer than this is just painful when a timeout condition occurs.
 */
#define SMBUS_TIMEOUT (100*1000*10)
 
#define abcfg_reg(reg, mask, val)       \
        alink_ab_indx((ABCFG), (reg), (mask), (val))
#define axcfg_reg(reg, mask, val)       \
        alink_ab_indx((AXCFG), (reg), (mask), (val))
#define axindxc_reg(reg, mask, val)     \
        alink_ax_indx((AX_INDXC), (reg), (mask), (val))
#define axindxp_reg(reg, mask, val)             \
        alink_ax_indx((AX_INDXP), (reg), (mask), (val))
#define rcindxc_reg(reg, port, mask, val)       \
        alink_rc_indx((RC_INDXC), (reg), (port), (mask), (val))
#define rcindxp_reg(reg, port, mask, val)       \
        alink_rc_indx((RC_INDXP), (reg), (port), (mask), (val))
 
int do_smbus_read_byte(u32 smbus_io_base, u32 device, u32 address);
int do_smbus_write_byte(u32 smbus_io_base, u32 device, u32 address, u8 val);
int do_smbus_recv_byte(u32 smbus_io_base, u32 device);
int do_smbus_send_byte(u32 smbus_io_base, u32 device, u8 val);
void alink_rc_indx(u32 reg_space, u32 reg_addr, u32 port, u32 mask, u32 val);
void alink_ab_indx(u32 reg_space, u32 reg_addr, u32 mask, u32 val);
void alink_ax_indx(u32 space /*c or p? */ , u32 axindc, u32 mask, u32 val);
 
#endif