arch/mips/include/asm/sibyte/sb1250_smbus.h

Source file repositories/reference/linux-study-clean/arch/mips/include/asm/sibyte/sb1250_smbus.h

File Facts

System
Linux kernel
Corpus path
arch/mips/include/asm/sibyte/sb1250_smbus.h
Extension
.h
Size
6365 bytes
Lines
192
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _SB1250_SMBUS_H
#define _SB1250_SMBUS_H

#include <asm/sibyte/sb1250_defs.h>

/*
 * SMBus Clock Frequency Register (Table 14-2)
 */

#define S_SMB_FREQ_DIV		    0
#define M_SMB_FREQ_DIV		    _SB_MAKEMASK(13, S_SMB_FREQ_DIV)
#define V_SMB_FREQ_DIV(x)	    _SB_MAKEVALUE(x, S_SMB_FREQ_DIV)

#define K_SMB_FREQ_400KHZ	    0x1F
#define K_SMB_FREQ_100KHZ	    0x7D
#define K_SMB_FREQ_10KHZ	    1250

#define S_SMB_CMD		    0
#define M_SMB_CMD		    _SB_MAKEMASK(8, S_SMB_CMD)
#define V_SMB_CMD(x)		    _SB_MAKEVALUE(x, S_SMB_CMD)

/*
 * SMBus control register (Table 14-4)
 */

#define M_SMB_ERR_INTR		    _SB_MAKEMASK1(0)
#define M_SMB_FINISH_INTR	    _SB_MAKEMASK1(1)

#define S_SMB_DATA_OUT		    4
#define M_SMB_DATA_OUT		    _SB_MAKEMASK1(S_SMB_DATA_OUT)
#define V_SMB_DATA_OUT(x)	    _SB_MAKEVALUE(x, S_SMB_DATA_OUT)

#define M_SMB_DATA_DIR		    _SB_MAKEMASK1(5)
#define M_SMB_DATA_DIR_OUTPUT	    M_SMB_DATA_DIR
#define M_SMB_CLK_OUT		    _SB_MAKEMASK1(6)
#define M_SMB_DIRECT_ENABLE	    _SB_MAKEMASK1(7)

/*
 * SMBus status registers (Table 14-5)
 */

#define M_SMB_BUSY		    _SB_MAKEMASK1(0)
#define M_SMB_ERROR		    _SB_MAKEMASK1(1)
#define M_SMB_ERROR_TYPE	    _SB_MAKEMASK1(2)

#if SIBYTE_HDR_FEATURE(1250, PASS3) || SIBYTE_HDR_FEATURE(112x, PASS1) || SIBYTE_HDR_FEATURE_CHIP(1480)
#define S_SMB_SCL_IN		    5
#define M_SMB_SCL_IN		    _SB_MAKEMASK1(S_SMB_SCL_IN)
#define V_SMB_SCL_IN(x)		    _SB_MAKEVALUE(x, S_SMB_SCL_IN)
#define G_SMB_SCL_IN(x)		    _SB_GETVALUE(x, S_SMB_SCL_IN, M_SMB_SCL_IN)
#endif /* 1250 PASS3 || 112x PASS1 || 1480 */

#define S_SMB_REF		    6
#define M_SMB_REF		    _SB_MAKEMASK1(S_SMB_REF)
#define V_SMB_REF(x)		    _SB_MAKEVALUE(x, S_SMB_REF)
#define G_SMB_REF(x)		    _SB_GETVALUE(x, S_SMB_REF, M_SMB_REF)

#define S_SMB_DATA_IN		    7
#define M_SMB_DATA_IN		    _SB_MAKEMASK1(S_SMB_DATA_IN)
#define V_SMB_DATA_IN(x)	    _SB_MAKEVALUE(x, S_SMB_DATA_IN)
#define G_SMB_DATA_IN(x)	    _SB_GETVALUE(x, S_SMB_DATA_IN, M_SMB_DATA_IN)

/*
 * SMBus Start/Command registers (Table 14-9)
 */

#define S_SMB_ADDR		    0
#define M_SMB_ADDR		    _SB_MAKEMASK(7, S_SMB_ADDR)
#define V_SMB_ADDR(x)		    _SB_MAKEVALUE(x, S_SMB_ADDR)
#define G_SMB_ADDR(x)		    _SB_GETVALUE(x, S_SMB_ADDR, M_SMB_ADDR)

#define M_SMB_QDATA		    _SB_MAKEMASK1(7)

#define S_SMB_TT		    8
#define M_SMB_TT		    _SB_MAKEMASK(3, S_SMB_TT)
#define V_SMB_TT(x)		    _SB_MAKEVALUE(x, S_SMB_TT)
#define G_SMB_TT(x)		    _SB_GETVALUE(x, S_SMB_TT, M_SMB_TT)

#define K_SMB_TT_WR1BYTE	    0
#define K_SMB_TT_WR2BYTE	    1
#define K_SMB_TT_WR3BYTE	    2
#define K_SMB_TT_CMD_RD1BYTE	    3
#define K_SMB_TT_CMD_RD2BYTE	    4
#define K_SMB_TT_RD1BYTE	    5
#define K_SMB_TT_QUICKCMD	    6
#define K_SMB_TT_EEPROMREAD	    7

#define V_SMB_TT_WR1BYTE	    V_SMB_TT(K_SMB_TT_WR1BYTE)
#define V_SMB_TT_WR2BYTE	    V_SMB_TT(K_SMB_TT_WR2BYTE)
#define V_SMB_TT_WR3BYTE	    V_SMB_TT(K_SMB_TT_WR3BYTE)

Annotation

Implementation Notes