/**************************************************************************
*
*    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
***************************************************************************/

/*
#include <asm/io.h>
#include <asm/types.h>
#include <linux/netdevice.h>
*/

typedef unsigned char u8;
typedef signed char s8;
typedef unsigned short u16;
typedef signed short s16;
typedef unsigned int u32;
typedef signed int s32;
        /*****************************************************************
         * 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 */

/* Generic MII/PHY Registers */

#define MII_GEN_CTL                     0x00
#define         MII_GC_RESET            0x8000
#define         MII_GC_LOOPBK           0x4000
#define         MII_GC_SPEEDSEL         0x2000
#define         MII_GC_AUTOENB          0x1000
#define         MII_GC_PDOWN            0x0800
#define         MII_GC_ISOLATE          0x0400
#define         MII_GC_AUTORSRT         0x0200
#define         MII_GC_DUPLEX           0x0100
#define         MII_GC_COLTEST          0x0080
#define         MII_GC_RESERVED         0x007F
#define MII_GEN_STS                     0x01
#define         MII_GS_100BT4           0x8000
#define         MII_GS_100BTXFD         0x4000
#define         MII_GS_100BTXHD         0x2000
#define         MII_GS_10BTFD           0x1000
#define         MII_GS_10BTHD           0x0800
#define         MII_GS_RESERVED         0x07C0
#define         MII_GS_AUTOCMPLT        0x0020
#define         MII_GS_RFLT             0x0010
#define         MII_GS_AUTONEG          0x0008
#define         MII_GS_LINK             0x0004
#define         MII_GS_JABBER           0x0002
#define         MII_GS_EXTCAP           0x0001
#define MII_GEN_ID_HI                   0x02
#define MII_GEN_ID_LO                   0x03
#define         MII_GIL_OUI             0xFC00
#define         MII_GIL_MODEL           0x03F0
#define         MII_GIL_REVISION        0x000F
#define MII_AN_ADV                      0x04
#define MII_AN_LPA                      0x05
#define MII_AN_EXP                      0x06

/* 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. */

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 */




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 */




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 */




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));

}




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));

}




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




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




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 */
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 */

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 ) ) )

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 */