1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 3 #ifndef HUDSON_SMBUS_H 4 #define HUDSON_SMBUS_H 5 6 #include <stdint.h> 7 8 #define SMBHSTSTAT 0x0 9 #define SMBSLVSTAT 0x1 10 #define SMBHSTCTRL 0x2 11 #define SMBHSTCMD 0x3 12 #define SMBHSTADDR 0x4 13 #define SMBHSTDAT0 0x5 14 #define SMBHSTDAT1 0x6 15 #define SMBHSTBLKDAT 0x7 16 17 #define SMBSLVCTRL 0x8 18 #define SMBSLVCMD_SHADOW 0x9 19 #define SMBSLVEVT 0xa 20 #define SMBSLVDAT 0xc 21 22 #define AX_INDXC 0 23 #define AX_INDXP 2 24 #define AXCFG 4 25 #define ABCFG 6 26 #define RC_INDXC 1 27 #define RC_INDXP 3 28 29 #define AB_INDX 0xcd8 30 #define AB_DATA (AB_INDX + 4) 31 32 /* Between 1-10 seconds, We should never timeout normally 33 * Longer than this is just painful when a timeout condition occurs. 34 */ 35 #define SMBUS_TIMEOUT (100 * 1000 * 10) 36 37 #define abcfg_reg(reg, mask, val) \ 38 alink_ab_indx((ABCFG), (reg), (mask), (val)) 39 #define axcfg_reg(reg, mask, val) \ 40 alink_ab_indx((AXCFG), (reg), (mask), (val)) 41 #define axindxc_reg(reg, mask, val) \ 42 alink_ax_indx((AX_INDXC), (reg), (mask), (val)) 43 #define axindxp_reg(reg, mask, val) \ 44 alink_ax_indx((AX_INDXP), (reg), (mask), (val)) 45 #define rcindxc_reg(reg, port, mask, val) \ 46 alink_rc_indx((RC_INDXC), (reg), (port), (mask), (val)) 47 #define rcindxp_reg(reg, port, mask, val) \ 48 alink_rc_indx((RC_INDXP), (reg), (port), (mask), (val)) 49 50 int do_smbus_read_byte(u32 smbus_io_base, u32 device, u32 address); 51 int do_smbus_write_byte(u32 smbus_io_base, u32 device, u32 address, u8 val); 52 int do_smbus_recv_byte(u32 smbus_io_base, u32 device); 53 int do_smbus_send_byte(u32 smbus_io_base, u32 device, u8 val); 54 void alink_rc_indx(u32 reg_space, u32 reg_addr, u32 port, u32 mask, u32 val); 55 void alink_ab_indx(u32 reg_space, u32 reg_addr, u32 mask, u32 val); 56 void alink_ax_indx(u32 space /*c or p? */, u32 axindc, u32 mask, u32 val); 57 58 #endif 59