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/* sis900.h Definitions for SiS ethernet controllers including 7014/7016 and 900
 * Copyright 1999 Silicon Integrated System Corporation
 * References:
 *   SiS 7016 Fast Ethernet PCI Bus 10/100 Mbps LAN Controller with OnNow Support,
 *	preliminary Rev. 1.0 Jan. 14, 1998
 *   SiS 900 Fast Ethernet PCI Bus 10/100 Mbps LAN Single Chip with OnNow Support,
 *	preliminary Rev. 1.0 Nov. 10, 1998
 *   SiS 7014 Single Chip 100BASE-TX/10BASE-T Physical Layer Solution,
 *	preliminary Rev. 1.0 Jan. 18, 1998
 *   http://www.sis.com.tw/support/databook.htm
 */

/*
 * SiS 7016 and SiS 900 ethernet controller registers
 */

/* The I/O extent, SiS 900 needs 256 bytes of io address */
#define SIS900_TOTAL_SIZE 0x100

/* Symbolic offsets to registers. */
enum sis900_registers {
	cr=0x0,                 //Command Register
	cfg=0x4,                //Configuration Register
	mear=0x8,               //EEPROM Access Register
	ptscr=0xc,              //PCI Test Control Register
	isr=0x10,               //Interrupt Status Register
	imr=0x14,               //Interrupt Mask Register
	ier=0x18,               //Interrupt Enable Register
	epar=0x18,              //Enhanced PHY Access Register
	txdp=0x20,              //Transmit Descriptor Pointer Register
        txcfg=0x24,             //Transmit Configuration Register
        rxdp=0x30,              //Receive Descriptor Pointer Register
        rxcfg=0x34,             //Receive Configuration Register
        flctrl=0x38,            //Flow Control Register
        rxlen=0x3c,             //Receive Packet Length Register
        rfcr=0x48,              //Receive Filter Control Register
        rfdr=0x4C,              //Receive Filter Data Register
        pmctrl=0xB0,            //Power Management Control Register
        pmer=0xB4               //Power Management Wake-up Event Register
};

/* Symbolic names for bits in various registers */
enum sis900_command_register_bits {
	RELOAD  = 0x00000400, ACCESSMODE = 0x00000200,/* ET */
	RESET   = 0x00000100, SWI = 0x00000080, RxRESET = 0x00000020,
	TxRESET = 0x00000010, RxDIS = 0x00000008, RxENA = 0x00000004,
	TxDIS   = 0x00000002, TxENA = 0x00000001
};

enum sis900_configuration_register_bits {
	DESCRFMT = 0x00000100 /* 7016 specific */, REQALG = 0x00000080,
	SB    = 0x00000040, POW = 0x00000020, EXD = 0x00000010,
	PESEL = 0x00000008, LPM = 0x00000004, BEM = 0x00000001,
	/* 635 & 900B Specific */
	RND_CNT = 0x00000400, FAIR_BACKOFF = 0x00000200,
	EDB_MASTER_EN = 0x00002000
};

enum sis900_eeprom_access_reigster_bits {
	MDC  = 0x00000040, MDDIR = 0x00000020, MDIO = 0x00000010, /* 7016 specific */
	EECS = 0x00000008, EECLK = 0x00000004, EEDO = 0x00000002,
	EEDI = 0x00000001
};

enum sis900_interrupt_register_bits {
	WKEVT  = 0x10000000, TxPAUSEEND = 0x08000000, TxPAUSE = 0x04000000,
	TxRCMP = 0x02000000, RxRCMP = 0x01000000, DPERR = 0x00800000,
	SSERR  = 0x00400000, RMABT  = 0x00200000, RTABT = 0x00100000,
	RxSOVR = 0x00010000, HIBERR = 0x00008000, SWINT = 0x00001000,
	MIBINT = 0x00000800, TxURN  = 0x00000400, TxIDLE  = 0x00000200,
	TxERR  = 0x00000100, TxDESC = 0x00000080, TxOK  = 0x00000040,
	RxORN  = 0x00000020, RxIDLE = 0x00000010, RxEARLY = 0x00000008,
	RxERR  = 0x00000004, RxDESC = 0x00000002, RxOK  = 0x00000001
};

enum sis900_interrupt_enable_reigster_bits {
	IE = 0x00000001
};

/* maximum dma burst for transmission and receive */
#define MAX_DMA_RANGE	7	/* actually 0 means MAXIMUM !! */
#define TxMXDMA_shift   	20
#define RxMXDMA_shift    20

enum sis900_tx_rx_dma{
	DMA_BURST_512 = 0,	DMA_BURST_64 = 5
};

/* transmit FIFO thresholds */
#define TX_FILL_THRESH   16	/* 1/4 FIFO size */
#define TxFILLT_shift   	8
#define TxDRNT_shift    	0
#define TxDRNT_100      	48	/* 3/4 FIFO size */
#define TxDRNT_10		16 	/* 1/2 FIFO size */

enum sis900_transmit_config_register_bits {
	TxCSI = 0x80000000, TxHBI = 0x40000000, TxMLB = 0x20000000,
	TxATP = 0x10000000, TxIFG = 0x0C000000, TxFILLT = 0x00003F00,
	TxDRNT = 0x0000003F
};

/* recevie FIFO thresholds */
#define RxDRNT_shift     1
#define RxDRNT_100	16	/* 1/2 FIFO size */
#define RxDRNT_10		24 	/* 3/4 FIFO size */

enum sis900_reveive_config_register_bits {
	RxAEP  = 0x80000000, RxARP = 0x40000000, RxATX = 0x10000000,
	RxAJAB = 0x08000000, RxDRNT = 0x0000007F
};

#define RFAA_shift      28
#define RFADDR_shift    16

enum sis900_receive_filter_control_register_bits {
	RFEN  = 0x80000000, RFAAB = 0x40000000, RFAAM = 0x20000000,
	RFAAP = 0x10000000, RFPromiscuous = (RFAAB|RFAAM|RFAAP)
};

enum sis900_reveive_filter_data_mask {
	RFDAT =  0x0000FFFF
};

/* EEPROM Addresses */
enum sis900_eeprom_address {
	EEPROMSignature = 0x00, EEPROMVendorID = 0x02, EEPROMDeviceID = 0x03,
	EEPROMMACAddr   = 0x08, EEPROMChecksum = 0x0b
};

/* The EEPROM commands include the alway-set leading bit. Refer to NM93Cxx datasheet */
enum sis900_eeprom_command {
	EEread     = 0x0180, EEwrite    = 0x0140, EEerase = 0x01C0,
	EEwriteEnable = 0x0130, EEwriteDisable = 0x0100,
	EEeraseAll = 0x0120, EEwriteAll = 0x0110,
	EEaddrMask = 0x013F, EEcmdShift = 16
};

/* For SiS962 or SiS963, request the eeprom software access */
enum sis96x_eeprom_command {
	EEREQ = 0x00000400, EEDONE = 0x00000200, EEGNT = 0x00000100
};

/* PCI Registers */
enum sis900_pci_registers {
	CFGPMC 	 = 0x40,
	CFGPMCSR = 0x44
};

/* Power management capabilities bits */
enum sis900_cfgpmc_register_bits {
	PMVER	= 0x00070000,
	DSI	= 0x00100000,
	PMESP	= 0xf8000000
};

enum sis900_pmesp_bits {
	PME_D0 = 0x1,
	PME_D1 = 0x2,
	PME_D2 = 0x4,
	PME_D3H = 0x8,
	PME_D3C = 0x10
};

/* Power management control/status bits */
enum sis900_cfgpmcsr_register_bits {
	PMESTS = 0x00004000,
	PME_EN = 0x00000100, // Power management enable
	PWR_STA = 0x00000003 // Current power state
};

/* Wake-on-LAN support. */
enum sis900_power_management_control_register_bits {
	LINKLOSS  = 0x00000001,
	LINKON    = 0x00000002,
	MAGICPKT  = 0x00000400,
	ALGORITHM = 0x00000800,
	FRM1EN    = 0x00100000,
	FRM2EN    = 0x00200000,
	FRM3EN    = 0x00400000,
	FRM1ACS   = 0x01000000,
	FRM2ACS   = 0x02000000,
	FRM3ACS   = 0x04000000,
	WAKEALL   = 0x40000000,
	GATECLK   = 0x80000000
};

/* Management Data I/O (mdio) frame */
#define MIIread         0x6000
#define MIIwrite        0x5002
#define MIIpmdShift     7
#define MIIregShift     2
#define MIIcmdLen       16
#define MIIcmdShift     16

/* Buffer Descriptor Status*/