/**************************************************************************
*
*    tlan.c -- Etherboot device driver for the Texas Instruments ThunderLAN
*    Written 2003-2003 by Timothy Legge <tlegge@rogers.com>
*
*    This program is free software; you can redistribute it and/or modify
*    it under the terms of the GNU General Public License as published by
*    the Free Software Foundation; either version 2 of the License, or
*    (at your option) any later version.
*
*    This program is distributed in the hope that it will be useful,
*    but WITHOUT ANY WARRANTY; without even the implied warranty of
*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*    GNU General Public License for more details.
*
*    You should have received a copy of the GNU General Public License
*    along with this program; if not, write to the Free Software
*    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*    Portions of this code (almost all) based on:
*               tlan.c: Linux ThunderLan Driver:
*
*				by James Banks
*
*  				(C) 1997-1998 Caldera, Inc.
*			  	(C) 1998 James Banks
*				(C) 1999-2001 Torben Mathiasen
*				(C) 2002 Samuel Chessman
*
*    REVISION HISTORY:
*    ================
*    v1.0	07-08-2003	timlegge	Initial not quite working version
*
* Indent Style: indent -kr -i8
***************************************************************************/

FILE_LICENCE ( GPL2_OR_LATER );

/*****************************************************************
* TLan Definitions
*
****************************************************************/

#define FALSE			0
#define TRUE			1

#define TLAN_MIN_FRAME_SIZE	64
#define TLAN_MAX_FRAME_SIZE	1600

#define TLAN_NUM_RX_LISTS	4
#define TLAN_NUM_TX_LISTS	2

#define TLAN_IGNORE		0
#define TLAN_RECORD		1
/*
#define TLAN_DBG(lvl, format, args...)	if (debug&lvl) printf("TLAN: " format, ##args );
*/
#define TLAN_DEBUG_GNRL		0x0001
#define TLAN_DEBUG_TX		0x0002
#define TLAN_DEBUG_RX		0x0004
#define TLAN_DEBUG_LIST		0x0008
#define TLAN_DEBUG_PROBE	0x0010

#define TX_TIMEOUT		(10*HZ)	/* We need time for auto-neg */
#define MAX_TLAN_BOARDS		8	/* Max number of boards installed at a time */


	/*****************************************************************
	 * Device Identification Definitions
	 *
	 ****************************************************************/

#define PCI_DEVICE_ID_NETELLIGENT_10_T2			0xB012
#define PCI_DEVICE_ID_NETELLIGENT_10_100_WS_5100	0xB030
#ifndef PCI_DEVICE_ID_OLICOM_OC2183
#define PCI_DEVICE_ID_OLICOM_OC2183			0x0013
#endif
#ifndef PCI_DEVICE_ID_OLICOM_OC2325
#define PCI_DEVICE_ID_OLICOM_OC2325			0x0012
#endif
#ifndef PCI_DEVICE_ID_OLICOM_OC2326
#define PCI_DEVICE_ID_OLICOM_OC2326			0x0014
#endif

typedef struct tlan_adapter_entry {
	u16 vendorId;
	u16 deviceId;
	char *deviceLabel;
	u32 flags;
	u16 addrOfs;
} TLanAdapterEntry;

#define TLAN_ADAPTER_NONE		0x00000000
#define TLAN_ADAPTER_UNMANAGED_PHY	0x00000001
#define TLAN_ADAPTER_BIT_RATE_PHY	0x00000002
#define TLAN_ADAPTER_USE_INTERN_10	0x00000004
#define TLAN_ADAPTER_ACTIVITY_LED	0x00000008

#define TLAN_SPEED_DEFAULT	0
#define TLAN_SPEED_10		10
#define TLAN_SPEED_100		100

#define TLAN_DUPLEX_DEFAULT	0
#define TLAN_DUPLEX_HALF	1
#define TLAN_DUPLEX_FULL	2


	/*****************************************************************
	 * EISA Definitions
	 *
	 ****************************************************************/

#define EISA_ID      0xc80	/* EISA ID Registers */
#define EISA_ID0     0xc80	/* EISA ID Register 0 */
#define EISA_ID1     0xc81	/* EISA ID Register 1 */
#define EISA_ID2     0xc82	/* EISA ID Register 2 */
#define EISA_ID3     0xc83	/* EISA ID Register 3 */
#define EISA_CR      0xc84	/* EISA Control Register */
#define EISA_REG0    0xc88	/* EISA Configuration Register 0 */
#define EISA_REG1    0xc89	/* EISA Configuration Register 1 */
#define EISA_REG2    0xc8a	/* EISA Configuration Register 2 */
#define EISA_REG3    0xc8f	/* EISA Configuration Register 3 */
#define EISA_APROM   0xc90	/* Ethernet Address PROM */


	/*****************************************************************
	 * Rx/Tx List Definitions
	 *
	 ****************************************************************/

#define TLAN_BUFFERS_PER_LIST	10
#define TLAN_LAST_BUFFER	0x80000000
#define TLAN_CSTAT_UNUSED	0x8000
#define TLAN_CSTAT_FRM_CMP	0x4000
#define TLAN_CSTAT_READY	0x3000
#define TLAN_CSTAT_EOC		0x0800
#define TLAN_CSTAT_RX_ERROR	0x0400
#define TLAN_CSTAT_PASS_CRC	0x0200
#define TLAN_CSTAT_DP_PR	0x0100


	/*****************************************************************
	 * PHY definitions
	 *
	 ****************************************************************/

#define TLAN_PHY_MAX_ADDR	0x1F
#define TLAN_PHY_NONE		0x20


	/*****************************************************************
	 * TLan Driver Timer Definitions
	 *
	 ****************************************************************/

#define TLAN_TIMER_LINK_BEAT		1
#define TLAN_TIMER_ACTIVITY		2
#define TLAN_TIMER_PHY_PDOWN		3
#define TLAN_TIMER_PHY_PUP		4
#define TLAN_TIMER_PHY_RESET		5
#define TLAN_TIMER_PHY_START_LINK	6
#define TLAN_TIMER_PHY_FINISH_AN	7
#define TLAN_TIMER_FINISH_RESET		8

#define TLAN_TIMER_ACT_DELAY		(HZ/10)


	/*****************************************************************
	 * TLan Driver Eeprom Definitions
	 *
	 ****************************************************************/

#define TLAN_EEPROM_ACK		0
#define TLAN_EEPROM_STOP	1


	/*****************************************************************
	 * Host Register Offsets and Contents
	 *
	 ****************************************************************/

#define TLAN_HOST_CMD			0x00
#define 	TLAN_HC_GO		0x80000000
#define		TLAN_HC_STOP		0x40000000
#define		TLAN_HC_ACK		0x20000000
#define		TLAN_HC_CS_MASK		0x1FE00000
#define		TLAN_HC_EOC		0x00100000
#define		TLAN_HC_RT		0x00080000
#define		TLAN_HC_NES		0x00040000
#define		TLAN_HC_AD_RST		0x00008000
#define		TLAN_HC_LD_TMR		0x00004000
#define		TLAN_HC_LD_THR		0x00002000
#define		TLAN_HC_REQ_INT		0x00001000
#define		TLAN_HC_INT_OFF		0x00000800
#define		TLAN_HC_INT_ON		0x00000400
#define		TLAN_HC_AC_MASK		0x000000FF
#define TLAN_CH_PARM			0x04
#define TLAN_DIO_ADR			0x08
#define		TLAN_DA_ADR_INC		0x8000
#define		TLAN_DA_RAM_ADR		0x4000
#define TLAN_HOST_INT			0x0A
#define		TLAN_HI_IV_MASK		0x1FE0
#define		TLAN_HI_IT_MASK		0x001C
#define TLAN_DIO_DATA			0x0C


/* ThunderLAN Internal Register DIO Offsets */

#define TLAN_NET_CMD			0x00
#define		TLAN_NET_CMD_NRESET	0x80
#define		TLAN_NET_CMD_NWRAP	0x40
#define		TLAN_NET_CMD_CSF	0x20
#define		TLAN_NET_CMD_CAF	0x10
#define		TLAN_NET_CMD_NOBRX	0x08
#define		TLAN_NET_CMD_DUPLEX	0x04
#define		TLAN_NET_CMD_TRFRAM	0x02
#define		TLAN_NET_CMD_TXPACE	0x01
#define TLAN_NET_SIO			0x01
#define 	TLAN_NET_SIO_MINTEN	0x80
#define		TLAN_NET_SIO_ECLOK	0x40
#define		TLAN_NET_SIO_ETXEN	0x20
#define		TLAN_NET_SIO_EDATA	0x10
#define		TLAN_NET_SIO_NMRST	0x08
#define		TLAN_NET_SIO_MCLK	0x04
#define		TLAN_NET_SIO_MTXEN	0x02
#define		TLAN_NET_SIO_MDATA	0x01
#define TLAN_NET_STS			0x02
#define		TLAN_NET_STS_MIRQ	0x80
#define		TLAN_NET_STS_HBEAT	0x40
#define		TLAN_NET_STS_TXSTOP	0x20
#define		TLAN_NET_STS_RXSTOP	0x10
#define		TLAN_NET_STS_RSRVD	0x0F
#define TLAN_NET_MASK			0x03
#define		TLAN_NET_MASK_MASK7	0x80
#define		TLAN_NET_MASK_MASK6	0x40
#define		TLAN_NET_MASK_MASK5	0x20
#define		TLAN_NET_MASK_MASK4	0x10
#define		TLAN_NET_MASK_RSRVD	0x0F
#define TLAN_NET_CONFIG			0x04
#define 	TLAN_NET_CFG_RCLK	0x8000
#define		TLAN_NET_CFG_TCLK	0x4000
#define		TLAN_NET_CFG_BIT	0x2000
#define		TLAN_NET_CFG_RXCRC	0x1000
#define		TLAN_NET_CFG_PEF	0x0800
#define		TLAN_NET_CFG_1FRAG	0x0400
#define		TLAN_NET_CFG_1CHAN	0x0200
#define		TLAN_NET_CFG_MTEST	0x0100
#define		TLAN_NET_CFG_PHY_EN	0x0080
#define		TLAN_NET_CFG_MSMASK	0x007F
#define TLAN_MAN_TEST			0x06
#define TLAN_DEF_VENDOR_ID		0x08
#define TLAN_DEF_DEVICE_ID		0x0A
#define TLAN_DEF_REVISION		0x0C
#define TLAN_DEF_SUBCLASS		0x0D
#define TLAN_DEF_MIN_LAT		0x0E
#define TLAN_DEF_MAX_LAT		0x0F
#define TLAN_AREG_0			0x10
#define TLAN_AREG_1			0x16
#define TLAN_AREG_2			0x1C
#define TLAN_AREG_3			0x22
#define TLAN_HASH_1			0x28
#define TLAN_HASH_2			0x2C
#define TLAN_GOOD_TX_FRMS		0x30
#define TLAN_TX_UNDERUNS		0x33
#define TLAN_GOOD_RX_FRMS		0x34
#define TLAN_RX_OVERRUNS		0x37
#define TLAN_DEFERRED_TX		0x38
#define TLAN_CRC_ERRORS			0x3A
#define TLAN_CODE_ERRORS		0x3B
#define TLAN_MULTICOL_FRMS		0x3C
#define TLAN_SINGLECOL_FRMS		0x3E
#define TLAN_EXCESSCOL_FRMS		0x40
#define TLAN_LATE_COLS			0x41
#define TLAN_CARRIER_LOSS		0x42
#define TLAN_ACOMMIT			0x43
#define TLAN_LED_REG			0x44
#define		TLAN_LED_ACT		0x10
#define		TLAN_LED_LINK		0x01
#define TLAN_BSIZE_REG			0x45
#define TLAN_MAX_RX			0x46
#define TLAN_INT_DIS			0x48
#define		TLAN_ID_TX_EOC		0x04
#define		TLAN_ID_RX_EOF		0x02
#define		TLAN_ID_RX_EOC		0x01


/* ThunderLAN Interrupt Codes */

#define TLAN_INT_NUMBER_OF_INTS	8

#define TLAN_INT_NONE			0x0000
#define TLAN_INT_TX_EOF			0x0001
#define TLAN_INT_STAT_OVERFLOW		0x0002
#define TLAN_INT_RX_EOF			0x0003
#define TLAN_INT_DUMMY			0x0004
#define TLAN_INT_TX_EOC			0x0005
#define TLAN_INT_STATUS_CHECK		0x0006
#define TLAN_INT_RX_EOC			0x0007


/* ThunderLAN MII Registers */

/* ThunderLAN Specific MII/PHY Registers */

#define TLAN_TLPHY_ID			0x10
#define TLAN_TLPHY_CTL			0x11
#define 	TLAN_TC_IGLINK		0x8000
#define		TLAN_TC_SWAPOL		0x4000
#define		TLAN_TC_AUISEL		0x2000
#define		TLAN_TC_SQEEN		0x1000
#define		TLAN_TC_MTEST		0x0800
#define		TLAN_TC_RESERVED	0x07F8
#define		TLAN_TC_NFEW		0x0004
#define		TLAN_TC_INTEN		0x0002
#define		TLAN_TC_TINT		0x0001
#define TLAN_TLPHY_STS			0x12
#define		TLAN_TS_MINT		0x8000
#define		TLAN_TS_PHOK		0x4000
#define		TLAN_TS_POLOK		0x2000
#define		TLAN_TS_TPENERGY	0x1000
#define		TLAN_TS_RESERVED	0x0FFF
#define TLAN_TLPHY_PAR			0x19
#define		TLAN_PHY_CIM_STAT	0x0020
#define		TLAN_PHY_SPEED_100	0x0040
#define		TLAN_PHY_DUPLEX_FULL	0x0080
#define		TLAN_PHY_AN_EN_STAT     0x0400

/* National Sem. & Level1 PHY id's */
#define NAT_SEM_ID1			0x2000
#define NAT_SEM_ID2			0x5C01
#define LEVEL1_ID1			0x7810
#define LEVEL1_ID2			0x0000

#define CIRC_INC( a, b ) if ( ++a >= b ) a = 0

/* Routines to access internal registers. */

static inline u8 TLan_DioRead8(u16 base_addr, u16 internal_addr)
{
	outw(internal_addr, base_addr + TLAN_DIO_ADR);
	return (inb((base_addr + TLAN_DIO_DATA) + (internal_addr & 0x3)));

}				/* TLan_DioRead8 */


static inline u16 TLan_DioRead16(u16 base_addr, u16 internal_addr)
{
	outw(internal_addr, base_addr + TLAN_DIO_ADR);
	return (inw((base_addr + TLAN_DIO_DATA) + (internal_addr & 0x2)));

}				/* TLan_DioRead16 */


static inline u32 TLan_DioRead32(u16 base_addr, u16 internal_addr)
{
	outw(internal_addr, base_addr + TLAN_DIO_ADR);
	return (inl(base_addr + TLAN_DIO_DATA));

}				/* TLan_DioRead32 */


static inline void TLan_DioWrite8(u16 base_addr, u16 internal_addr, u8 data)
{
	outw(internal_addr, base_addr + TLAN_DIO_ADR);
	outb(data, base_addr + TLAN_DIO_DATA + (internal_addr & 0x3));

}


static inline void TLan_DioWrite16(u16 base_addr, u16 internal_addr, u16 data)
{
	outw(internal_addr, base_addr + TLAN_DIO_ADR);
	outw(data, base_addr + TLAN_DIO_DATA + (internal_addr & 0x2));

}


static inline void TLan_DioWrite32(u16 base_addr, u16 internal_addr, u32 data)
{
	outw(internal_addr, base_addr + TLAN_DIO_ADR);
	outl(data, base_addr + TLAN_DIO_DATA + (internal_addr & 0x2));

}


#if 0
static inline void TLan_ClearBit(u8 bit, u16 port)
{
	outb_p(inb_p(port) & ~bit, port);
}


static inline int TLan_GetBit(u8 bit, u16 port)
{
	return ((int) (inb_p(port) & bit));
}


static inline void TLan_SetBit(u8 bit, u16 port)
{
	outb_p(inb_p(port) | bit, port);
}
#endif

#define TLan_ClearBit( bit, port )	outb_p(inb_p(port) & ~bit, port)
#define TLan_GetBit( bit, port )	((int) (inb_p(port) & bit))
#define TLan_SetBit( bit, port )	outb_p(inb_p(port) | bit, port)

#ifdef I_LIKE_A_FAST_HASH_FUNCTION
/* given 6 bytes, view them as 8 6-bit numbers and return the XOR of those */
/* the code below is about seven times as fast as the original code */
static inline u32 TLan_HashFunc(u8 * a)
{
	u8 hash;

	hash = (a[0] ^ a[3]);	/* & 077 */
	hash ^= ((a[0] ^ a[3]) >> 6);	/* & 003 */
	hash ^= ((a[1] ^ a[4]) << 2);	/* & 074 */
	hash ^= ((a[1] ^ a[4]) >> 4);	/* & 017 */
	hash ^= ((a[2] ^ a[5]) << 4);	/* & 060 */
	hash ^= ((a[2] ^ a[5]) >> 2);	/* & 077 */

	return (hash & 077);
}

#else				/* original code */

static inline u32 xor(u32 a, u32 b)
{
	return ((a && !b) || (!a && b));
}

#define XOR8( a, b, c, d, e, f, g, h )	xor( a, xor( b, xor( c, xor( d, xor( e, xor( f, xor( g, h ) ) ) ) ) ) )
#define DA( a, bit )					( ( (u8) a[bit/8] ) & ( (u8) ( 1 << bit%8 ) ) )

static inline u32 TLan_HashFunc(u8 * a)
{
	u32 hash;

	hash =
	    XOR8(DA(a, 0), DA(a, 6), DA(a, 12), DA(a, 18), DA(a, 24),
		 DA(a, 30), DA(a, 36), DA(a, 42));
	hash |=
	    XOR8(DA(a, 1), DA(a, 7), DA(a, 13), DA(a, 19), DA(a, 25),
		 DA(a, 31), DA(a, 37), DA(a, 43)) << 1;
	hash |=
	    XOR8(DA(a, 2), DA(a, 8), DA(a, 14), DA(a, 20), DA(a, 26),
		 DA(a, 32), DA(a, 38), DA(a, 44)) << 2;
	hash |=
	    XOR8(DA(a, 3), DA(a, 9), DA(a, 15), DA(a, 21), DA(a, 27),
		 DA(a, 33), DA(a, 39), DA(a, 45)) << 3;
	hash |=
	    XOR8(DA(a, 4), DA(a, 10), DA(a, 16), DA(a, 22), DA(a, 28),
		 DA(a, 34), DA(a, 40), DA(a, 46)) << 4;
	hash |=
	    XOR8(DA(a, 5), DA(a, 11), DA(a, 17), DA(a, 23), DA(a, 29),
		 DA(a, 35), DA(a, 41), DA(a, 47)) << 5;

	return hash;

}

#endif				/* I_LIKE_A_FAST_HASH_FUNCTION */