dmfe.c

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/**************************************************************************
*
*    dmfe.c -- Etherboot device driver for the Davicom 
*       DM9102/DM9102A/DM9102A+DM9801/DM9102A+DM9802 NIC fast ethernet card
*
*    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 based on:
*
*       dmfe.c:     A Davicom DM9102/DM9102A/DM9102A+DM9801/DM9102A+DM9802 
*               NIC fast ethernet driver for Linux.
*       Copyright (C) 1997  Sten Wang
*       (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
*
*
*    REVISION HISTORY:
*    ================
*    v1.0       10-02-2004      timlegge        Boots ltsp needs cleanup 
*
*    Indent Options: indent -kr -i8
*
*
***************************************************************************/

FILE_LICENCE ( GPL2_OR_LATER );

/* to get some global routines like printf */
#include "etherboot.h"
/* to get the interface to the body of the program */
#include "nic.h"
/* to get the PCI support functions, if this is a PCI NIC */
#include <gpxe/pci.h>
#include <gpxe/ethernet.h>

/* #define EDEBUG 1 */
#ifdef EDEBUG
#define dprintf(x) printf x
#else
#define dprintf(x)
#endif

/* Condensed operations for readability. */
#define virt_to_le32desc(addr)  cpu_to_le32(virt_to_bus(addr))
#define le32desc_to_virt(addr)  bus_to_virt(le32_to_cpu(addr))

/* Board/System/Debug information/definition ---------------- */
#define PCI_DM9132_ID   0x91321282      /* Davicom DM9132 ID */
#define PCI_DM9102_ID   0x91021282      /* Davicom DM9102 ID */
#define PCI_DM9100_ID   0x91001282      /* Davicom DM9100 ID */
#define PCI_DM9009_ID   0x90091282      /* Davicom DM9009 ID */

#define DM9102_IO_SIZE  0x80
#define DM9102A_IO_SIZE 0x100
#define TX_MAX_SEND_CNT 0x1     /* Maximum tx packet per time */
#define TX_DESC_CNT     0x10    /* Allocated Tx descriptors */
#define RX_DESC_CNT     0x20    /* Allocated Rx descriptors */
#define TX_FREE_DESC_CNT (TX_DESC_CNT - 2)      /* Max TX packet count */
#define TX_WAKE_DESC_CNT (TX_DESC_CNT - 3)      /* TX wakeup count */
#define DESC_ALL_CNT    (TX_DESC_CNT + RX_DESC_CNT)
#define TX_BUF_ALLOC    0x600
#define RX_ALLOC_SIZE   0x620
#define DM910X_RESET    1
#define CR0_DEFAULT     0x00E00000      /* TX & RX burst mode */
#define CR6_DEFAULT     0x00080000      /* HD */
#define CR7_DEFAULT     0x180c1
#define CR15_DEFAULT    0x06    /* TxJabber RxWatchdog */
#define TDES0_ERR_MASK  0x4302  /* TXJT, LC, EC, FUE */
#define MAX_PACKET_SIZE 1514
#define DMFE_MAX_MULTICAST 14
#define RX_COPY_SIZE    100
#define MAX_CHECK_PACKET 0x8000
#define DM9801_NOISE_FLOOR 8
#define DM9802_NOISE_FLOOR 5

#define DMFE_10MHF      0
#define DMFE_100MHF     1
#define DMFE_10MFD      4
#define DMFE_100MFD     5
#define DMFE_AUTO       8
#define DMFE_1M_HPNA    0x10

#define DMFE_TXTH_72    0x400000        /* TX TH 72 byte */
#define DMFE_TXTH_96    0x404000        /* TX TH 96 byte */
#define DMFE_TXTH_128   0x0000  /* TX TH 128 byte */
#define DMFE_TXTH_256   0x4000  /* TX TH 256 byte */
#define DMFE_TXTH_512   0x8000  /* TX TH 512 byte */
#define DMFE_TXTH_1K    0xC000  /* TX TH 1K  byte */

#define DMFE_TIMER_WUT  (jiffies + HZ * 1)      /* timer wakeup time : 1 second */
#define DMFE_TX_TIMEOUT ((3*HZ)/2)      /* tx packet time-out time 1.5 s" */
#define DMFE_TX_KICK    (HZ/2)  /* tx packet Kick-out time 0.5 s" */

#define DMFE_DBUG(dbug_now, msg, value) if (dmfe_debug || (dbug_now)) printk(KERN_ERR DRV_NAME ": %s %lx\n", (msg), (long) (value))

#define SHOW_MEDIA_TYPE(mode) printk(KERN_ERR DRV_NAME ": Change Speed to %sMhz %s duplex\n",mode & 1 ?"100":"10", mode & 4 ? "full":"half");


/* CR9 definition: SROM/MII */
#define CR9_SROM_READ   0x4800
#define CR9_SRCS        0x1
#define CR9_SRCLK       0x2
#define CR9_CRDOUT      0x8
#define SROM_DATA_0     0x0
#define SROM_DATA_1     0x4
#define PHY_DATA_1      0x20000
#define PHY_DATA_0      0x00000
#define MDCLKH          0x10000

#define PHY_POWER_DOWN  0x800

#define SROM_V41_CODE   0x14

#define SROM_CLK_WRITE(data, ioaddr) outl(data|CR9_SROM_READ|CR9_SRCS,ioaddr);udelay(5);outl(data|CR9_SROM_READ|CR9_SRCS|CR9_SRCLK,ioaddr);udelay(5);outl(data|CR9_SROM_READ|CR9_SRCS,ioaddr);udelay(5);

#define __CHK_IO_SIZE(pci_id, dev_rev) ( ((pci_id)==PCI_DM9132_ID) || ((dev_rev) >= 0x02000030) ) ? DM9102A_IO_SIZE: DM9102_IO_SIZE
#define CHK_IO_SIZE(pci_dev, dev_rev) __CHK_IO_SIZE(((pci_dev)->device << 16) | (pci_dev)->vendor, dev_rev)

/* Sten Check */
#define DEVICE net_device

/* Structure/enum declaration ------------------------------- */
struct tx_desc {
        u32 tdes0, tdes1, tdes2, tdes3; /* Data for the card */
        void * tx_buf_ptr;              /* Data for us */
        struct tx_desc * next_tx_desc;
} __attribute__ ((aligned(32)));

struct rx_desc {
        u32 rdes0, rdes1, rdes2, rdes3; /* Data for the card */
        void * rx_skb_ptr;              /* Data for us */
        struct rx_desc * next_rx_desc;
} __attribute__ ((aligned(32)));

static struct dmfe_private {
        u32 chip_id;            /* Chip vendor/Device ID */
        u32 chip_revision;      /* Chip revision */
        u32 cr0_data;
//      u32 cr5_data;
        u32 cr6_data;
        u32 cr7_data;
        u32 cr15_data;

        u16 HPNA_command;       /* For HPNA register 16 */
        u16 HPNA_timer;         /* For HPNA remote device check */
        u16 NIC_capability;     /* NIC media capability */
        u16 PHY_reg4;           /* Saved Phyxcer register 4 value */

        u8 HPNA_present;        /* 0:none, 1:DM9801, 2:DM9802 */
        u8 chip_type;           /* Keep DM9102A chip type */
        u8 media_mode;          /* user specify media mode */
        u8 op_mode;             /* real work media mode */
        u8 phy_addr;
        u8 dm910x_chk_mode;     /* Operating mode check */

        /* NIC SROM data */
        unsigned char srom[128];
        /* Etherboot Only */
        u8 cur_tx;
        u8 cur_rx;
} dfx;

static struct dmfe_private *db;

enum dmfe_offsets {
        DCR0 = 0x00, DCR1 = 0x08, DCR2 = 0x10, DCR3 = 0x18, DCR4 = 0x20,
        DCR5 = 0x28, DCR6 = 0x30, DCR7 = 0x38, DCR8 = 0x40, DCR9 = 0x48,
        DCR10 = 0x50, DCR11 = 0x58, DCR12 = 0x60, DCR13 = 0x68, DCR14 =
            0x70,
        DCR15 = 0x78
};

enum dmfe_CR6_bits {
        CR6_RXSC = 0x2, CR6_PBF = 0x8, CR6_PM = 0x40, CR6_PAM = 0x80,
        CR6_FDM = 0x200, CR6_TXSC = 0x2000, CR6_STI = 0x100000,
        CR6_SFT = 0x200000, CR6_RXA = 0x40000000, CR6_NO_PURGE = 0x20000000
};

/* Global variable declaration ----------------------------- */
static struct nic_operations dmfe_operations;

static unsigned char dmfe_media_mode = DMFE_AUTO;
static u32 dmfe_cr6_user_set;

/* For module input parameter */
static u8 chkmode = 1;
static u8 HPNA_mode;            /* Default: Low Power/High Speed */
static u8 HPNA_rx_cmd;          /* Default: Disable Rx remote command */
static u8 HPNA_tx_cmd;          /* Default: Don't issue remote command */
static u8 HPNA_NoiseFloor;      /* Default: HPNA NoiseFloor */
static u8 SF_mode;              /* Special Function: 1:VLAN, 2:RX Flow Control
                                   4: TX pause packet */


/**********************************************
* Descriptor Ring and Buffer defination
***********************************************/
struct {
        struct tx_desc txd[TX_DESC_CNT] __attribute__ ((aligned(32)));
        unsigned char txb[TX_BUF_ALLOC * TX_DESC_CNT]
        __attribute__ ((aligned(32)));
        struct rx_desc rxd[RX_DESC_CNT] __attribute__ ((aligned(32)));
        unsigned char rxb[RX_ALLOC_SIZE * RX_DESC_CNT]
        __attribute__ ((aligned(32)));
} dmfe_bufs __shared;
#define txd dmfe_bufs.txd
#define txb dmfe_bufs.txb
#define rxd dmfe_bufs.rxd
#define rxb dmfe_bufs.rxb

/* NIC specific static variables go here */
static long int BASE;

static u16 read_srom_word(long ioaddr, int offset);
static void dmfe_init_dm910x(struct nic *nic);
static void dmfe_descriptor_init(struct nic *, unsigned long ioaddr);
static void update_cr6(u32, unsigned long);
static void send_filter_frame(struct nic *nic);
static void dm9132_id_table(struct nic *nic);

static u16 phy_read(unsigned long, u8, u8, u32);
static void phy_write(unsigned long, u8, u8, u16, u32);
static void phy_write_1bit(unsigned long, u32);
static u16 phy_read_1bit(unsigned long);
static void dmfe_set_phyxcer(struct nic *nic);

static void dmfe_parse_srom(struct nic *nic);
static void dmfe_program_DM9801(struct nic *nic, int);
static void dmfe_program_DM9802(struct nic *nic);

static void dmfe_reset(struct nic *nic)
{
        /* system variable init */
        db->cr6_data = CR6_DEFAULT | dmfe_cr6_user_set;

        db->NIC_capability = 0xf;       /* All capability */
        db->PHY_reg4 = 0x1e0;

        /* CR6 operation mode decision */
        if (!chkmode || (db->chip_id == PCI_DM9132_ID) ||
            (db->chip_revision >= 0x02000030)) {
                db->cr6_data |= DMFE_TXTH_256;
                db->cr0_data = CR0_DEFAULT;
                db->dm910x_chk_mode = 4;        /* Enter the normal mode */
        } else {
                db->cr6_data |= CR6_SFT;        /* Store & Forward mode */
                db->cr0_data = 0;
                db->dm910x_chk_mode = 1;        /* Enter the check mode */
        }
        /* Initilize DM910X board */
        dmfe_init_dm910x(nic);

        return;
}

/*      Initilize DM910X board
 *      Reset DM910X board
 *      Initilize TX/Rx descriptor chain structure
 *      Send the set-up frame
 *      Enable Tx/Rx machine
 */

static void dmfe_init_dm910x(struct nic *nic)
{
        unsigned long ioaddr = BASE;

        /* Reset DM910x MAC controller */
        outl(DM910X_RESET, ioaddr + DCR0);      /* RESET MAC */
        udelay(100);
        outl(db->cr0_data, ioaddr + DCR0);
        udelay(5);

        /* Phy addr : DM910(A)2/DM9132/9801, phy address = 1 */
        db->phy_addr = 1;

        /* Parser SROM and media mode */
        dmfe_parse_srom(nic);
        db->media_mode = dmfe_media_mode;

        /* RESET Phyxcer Chip by GPR port bit 7 */
        outl(0x180, ioaddr + DCR12);    /* Let bit 7 output port */
        if (db->chip_id == PCI_DM9009_ID) {
                outl(0x80, ioaddr + DCR12);     /* Issue RESET signal */
                mdelay(300);    /* Delay 300 ms */
        }
        outl(0x0, ioaddr + DCR12);      /* Clear RESET signal */

        /* Process Phyxcer Media Mode */
        if (!(db->media_mode & 0x10))   /* Force 1M mode */
                dmfe_set_phyxcer(nic);

        /* Media Mode Process */
        if (!(db->media_mode & DMFE_AUTO))
                db->op_mode = db->media_mode;   /* Force Mode */

        /* Initiliaze Transmit/Receive decriptor and CR3/4 */
        dmfe_descriptor_init(nic, ioaddr);

        /* tx descriptor start pointer */
        outl(virt_to_le32desc(&txd[0]), ioaddr + DCR4); /* TX DESC address */

        /* rx descriptor start pointer */
        outl(virt_to_le32desc(&rxd[0]), ioaddr + DCR3); /* RX DESC address */

        /* Init CR6 to program DM910x operation */
        update_cr6(db->cr6_data, ioaddr);

        /* Send setup frame */
        if (db->chip_id == PCI_DM9132_ID) {
                dm9132_id_table(nic);   /* DM9132 */
        } else {
                send_filter_frame(nic); /* DM9102/DM9102A */
        }

        /* Init CR7, interrupt active bit */
        db->cr7_data = CR7_DEFAULT;
        outl(db->cr7_data, ioaddr + DCR7);
        /* Init CR15, Tx jabber and Rx watchdog timer */
        outl(db->cr15_data, ioaddr + DCR15);
        /* Enable DM910X Tx/Rx function */
        db->cr6_data |= CR6_RXSC | CR6_TXSC | 0x40000;
        update_cr6(db->cr6_data, ioaddr);
}
#ifdef EDEBUG
void hex_dump(const char *data, const unsigned int len);
#endif
/**************************************************************************
POLL - Wait for a frame
***************************************************************************/
static int dmfe_poll(struct nic *nic, int retrieve)
{
        u32 rdes0;
        int entry = db->cur_rx % RX_DESC_CNT;
        int rxlen;
        rdes0 = le32_to_cpu(rxd[entry].rdes0);
        if (rdes0 & 0x80000000)
                return 0;

        if (!retrieve)
                return 1;

        if ((rdes0 & 0x300) != 0x300) {
                /* A packet without First/Last flag */
                printf("strange Packet\n");
                rxd[entry].rdes0 = cpu_to_le32(0x80000000);
                return 0;
        } else {
                /* A packet with First/Last flag */
                rxlen = ((rdes0 >> 16) & 0x3fff) - 4;
                /* error summary bit check */
                if (rdes0 & 0x8000) {
                        printf("Error\n");
                        return 0;
                }
                if (!(rdes0 & 0x8000) ||
                    ((db->cr6_data & CR6_PM) && (rxlen > 6))) {
                        if (db->dm910x_chk_mode & 1)
                                printf("Silly check mode\n");

                        nic->packetlen = rxlen;
                        memcpy(nic->packet, rxb + (entry * RX_ALLOC_SIZE),
                               nic->packetlen);
                }
        }
        rxd[entry].rdes0 = cpu_to_le32(0x80000000);
        db->cur_rx++;
        return 1;
}

static void dmfe_irq(struct nic *nic __unused, irq_action_t action __unused)
{
        switch ( action ) {
                case DISABLE :
                        break;
                case ENABLE :
                        break;
                case FORCE :
                        break;
        }
}

/**************************************************************************
TRANSMIT - Transmit a frame
***************************************************************************/
static void dmfe_transmit(struct nic *nic, 
        const char *dest,       /* Destination */
        unsigned int type,      /* Type */
        unsigned int size,      /* size */
        const char *packet)     /* Packet */
{       
        u16 nstype;
        u8 *ptxb;

        ptxb = &txb[db->cur_tx];

        /* Stop Tx */
        outl(0, BASE + DCR7);
        memcpy(ptxb, dest, ETH_ALEN);
        memcpy(ptxb + ETH_ALEN, nic->node_addr, ETH_ALEN);
        nstype = htons((u16) type);
        memcpy(ptxb + 2 * ETH_ALEN, (u8 *) & nstype, 2);
        memcpy(ptxb + ETH_HLEN, packet, size);

        size += ETH_HLEN;
        while (size < ETH_ZLEN)
                ptxb[size++] = '\0';

        /* setup the transmit descriptor */
        txd[db->cur_tx].tdes1 = cpu_to_le32(0xe1000000 | size);
        txd[db->cur_tx].tdes0 = cpu_to_le32(0x80000000);        /* give ownership to device */

        /* immediate transmit demand */
        outl(0x1, BASE + DCR1);
        outl(db->cr7_data, BASE + DCR7);

        /* Point to next TX descriptor */
        db->cur_tx++;
        db->cur_tx = db->cur_tx % TX_DESC_CNT;
}

/**************************************************************************
DISABLE - Turn off ethernet interface
***************************************************************************/
static void dmfe_disable ( struct nic *nic __unused ) {
        /* Reset & stop DM910X board */
        outl(DM910X_RESET, BASE + DCR0);
        udelay(5);
        phy_write(BASE, db->phy_addr, 0, 0x8000, db->chip_id);

}

/**************************************************************************
PROBE - Look for an adapter, this routine's visible to the outside
***************************************************************************/

#define board_found 1
#define valid_link 0
static int dmfe_probe ( struct nic *nic, struct pci_device *pci ) {

        uint32_t dev_rev, pci_pmr;
        int i;

        if (pci->ioaddr == 0)
                return 0;

        BASE = pci->ioaddr;
        printf("dmfe.c: Found %s Vendor=0x%hX Device=0x%hX\n",
               pci->driver_name, pci->vendor, pci->device);

        /* Read Chip revision */
        pci_read_config_dword(pci, PCI_REVISION_ID, &dev_rev);
        dprintf(("Revision %lX\n", dev_rev));

        /* point to private storage */
        db = &dfx;

        db->chip_id = ((u32) pci->device << 16) | pci->vendor;
        BASE = pci_bar_start(pci, PCI_BASE_ADDRESS_0);
        db->chip_revision = dev_rev;

        pci_read_config_dword(pci, 0x50, &pci_pmr);
        pci_pmr &= 0x70000;
        if ((pci_pmr == 0x10000) && (dev_rev == 0x02000031))
                db->chip_type = 1;      /* DM9102A E3 */
        else
                db->chip_type = 0;

        dprintf(("Chip type : %d\n", db->chip_type));

        /* read 64 word srom data */
        for (i = 0; i < 64; i++)
                ((u16 *) db->srom)[i] = cpu_to_le16(read_srom_word(BASE, i));

        /* Set Node address */
        for (i = 0; i < 6; i++)
                nic->node_addr[i] = db->srom[20 + i];

        /* Print out some hardware info */
        DBG ( "%s: %s at ioaddr %4.4lx\n", pci->driver_name, eth_ntoa ( nic->node_addr ), BASE );

        /* Set the card as PCI Bus Master */
        adjust_pci_device(pci);

        dmfe_reset(nic);

        nic->irqno  = 0;
        nic->ioaddr = pci->ioaddr;

        /* point to NIC specific routines */
        nic->nic_op     = &dmfe_operations;

        return 1;
}

/*
 *      Initialize transmit/Receive descriptor
 *      Using Chain structure, and allocate Tx/Rx buffer
 */

static void dmfe_descriptor_init(struct nic *nic __unused, unsigned long ioaddr)
{
        int i;
        db->cur_tx = 0;
        db->cur_rx = 0;

        /* tx descriptor start pointer */
        outl(virt_to_le32desc(&txd[0]), ioaddr + DCR4); /* TX DESC address */

        /* rx descriptor start pointer */
        outl(virt_to_le32desc(&rxd[0]), ioaddr + DCR3); /* RX DESC address */

        /* Init Transmit chain */
        for (i = 0; i < TX_DESC_CNT; i++) {
                txd[i].tx_buf_ptr = &txb[i];
                txd[i].tdes0 = cpu_to_le32(0);
                txd[i].tdes1 = cpu_to_le32(0x81000000); /* IC, chain */
                txd[i].tdes2 = cpu_to_le32(virt_to_bus(&txb[i]));
                txd[i].tdes3 = cpu_to_le32(virt_to_bus(&txd[i + 1]));
                txd[i].next_tx_desc = &txd[i + 1];
        }
        /* Mark the last entry as wrapping the ring */
        txd[i - 1].tdes3 = virt_to_le32desc(&txd[0]);
        txd[i - 1].next_tx_desc = &txd[0];

        /* receive descriptor chain */
        for (i = 0; i < RX_DESC_CNT; i++) {
                rxd[i].rx_skb_ptr = &rxb[i * RX_ALLOC_SIZE];
                rxd[i].rdes0 = cpu_to_le32(0x80000000);
                rxd[i].rdes1 = cpu_to_le32(0x01000600);
                rxd[i].rdes2 =
                    cpu_to_le32(virt_to_bus(&rxb[i * RX_ALLOC_SIZE]));
                rxd[i].rdes3 = cpu_to_le32(virt_to_bus(&rxd[i + 1]));
                rxd[i].next_rx_desc = &rxd[i + 1];
        }
        /* Mark the last entry as wrapping the ring */
        rxd[i - 1].rdes3 = cpu_to_le32(virt_to_bus(&rxd[0]));
        rxd[i - 1].next_rx_desc = &rxd[0];

}

/*
 *      Update CR6 value
 *      Firstly stop DM910X , then written value and start
 */

static void update_cr6(u32 cr6_data, unsigned long ioaddr)
{
        u32 cr6_tmp;

        cr6_tmp = cr6_data & ~0x2002;   /* stop Tx/Rx */
        outl(cr6_tmp, ioaddr + DCR6);
        udelay(5);
        outl(cr6_data, ioaddr + DCR6);
        udelay(5);
}


/*
 *      Send a setup frame for DM9132
 *      This setup frame initilize DM910X addres filter mode
*/

static void dm9132_id_table(struct nic *nic __unused)
{
#ifdef LINUX
        u16 *addrptr;
        u8 dmi_addr[8];
        unsigned long ioaddr = BASE + 0xc0;     /* ID Table */
        u32 hash_val;
        u16 i, hash_table[4];
#endif
        dprintf(("dm9132_id_table\n"));

        printf("FIXME: This function is broken.  If you have this card contact "
                "Timothy Legge at the etherboot-user list\n");

#ifdef LINUX
        //DMFE_DBUG(0, "dm9132_id_table()", 0);

        /* Node address */
        addrptr = (u16 *) nic->node_addr;
        outw(addrptr[0], ioaddr);
        ioaddr += 4;
        outw(addrptr[1], ioaddr);
        ioaddr += 4;
        outw(addrptr[2], ioaddr);
        ioaddr += 4;

        /* Clear Hash Table */
        for (i = 0; i < 4; i++)
                hash_table[i] = 0x0;

        /* broadcast address */
        hash_table[3] = 0x8000;

        /* the multicast address in Hash Table : 64 bits */
        for (mcptr = mc_list, i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
                hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
                hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
        }

        /* Write the hash table to MAC MD table */
        for (i = 0; i < 4; i++, ioaddr += 4)
                outw(hash_table[i], ioaddr);
#endif
}


/*
 *      Send a setup frame for DM9102/DM9102A
 *      This setup frame initilize DM910X addres filter mode
 */

static void send_filter_frame(struct nic *nic)
{

        u8 *ptxb;
        int i;

        dprintf(("send_filter_frame\n"));
        /* point to the current txb incase multiple tx_rings are used */
        ptxb = &txb[db->cur_tx];

        /* construct perfect filter frame with mac address as first match
           and broadcast address for all others */
        for (i = 0; i < 192; i++)
                ptxb[i] = 0xFF;
        ptxb[0] = nic->node_addr[0];
        ptxb[1] = nic->node_addr[1];
        ptxb[4] = nic->node_addr[2];
        ptxb[5] = nic->node_addr[3];
        ptxb[8] = nic->node_addr[4];
        ptxb[9] = nic->node_addr[5];

        /* prepare the setup frame */
        txd[db->cur_tx].tdes1 = cpu_to_le32(0x890000c0);
        txd[db->cur_tx].tdes0 = cpu_to_le32(0x80000000);
        update_cr6(db->cr6_data | 0x2000, BASE);
        outl(0x1, BASE + DCR1); /* Issue Tx polling */
        update_cr6(db->cr6_data, BASE);
        db->cur_tx++;
}

/*
 *      Read one word data from the serial ROM
 */

static u16 read_srom_word(long ioaddr, int offset)
{
        int i;
        u16 srom_data = 0;
        long cr9_ioaddr = ioaddr + DCR9;

        outl(CR9_SROM_READ, cr9_ioaddr);
        outl(CR9_SROM_READ | CR9_SRCS, cr9_ioaddr);

        /* Send the Read Command 110b */
        SROM_CLK_WRITE(SROM_DATA_1, cr9_ioaddr);
        SROM_CLK_WRITE(SROM_DATA_1, cr9_ioaddr);
        SROM_CLK_WRITE(SROM_DATA_0, cr9_ioaddr);

        /* Send the offset */
        for (i = 5; i >= 0; i--) {
                srom_data =
                    (offset & (1 << i)) ? SROM_DATA_1 : SROM_DATA_0;
                SROM_CLK_WRITE(srom_data, cr9_ioaddr);
        }

        outl(CR9_SROM_READ | CR9_SRCS, cr9_ioaddr);

        for (i = 16; i > 0; i--) {
                outl(CR9_SROM_READ | CR9_SRCS | CR9_SRCLK, cr9_ioaddr);
                udelay(5);
                srom_data =
                    (srom_data << 1) | ((inl(cr9_ioaddr) & CR9_CRDOUT) ? 1
                                        : 0);
                outl(CR9_SROM_READ | CR9_SRCS, cr9_ioaddr);
                udelay(5);
        }

        outl(CR9_SROM_READ, cr9_ioaddr);
        return srom_data;
}


/*
 *      Auto sense the media mode
 */

#if 0 /* not used */
static u8 dmfe_sense_speed(struct nic *nic __unused)
{
        u8 ErrFlag = 0;
        u16 phy_mode;

        /* CR6 bit18=0, select 10/100M */
        update_cr6((db->cr6_data & ~0x40000), BASE);

        phy_mode = phy_read(BASE, db->phy_addr, 1, db->chip_id);
        phy_mode = phy_read(BASE, db->phy_addr, 1, db->chip_id);

        if ((phy_mode & 0x24) == 0x24) {
                if (db->chip_id == PCI_DM9132_ID)       /* DM9132 */
                        phy_mode =
                            phy_read(BASE, db->phy_addr, 7,
                                     db->chip_id) & 0xf000;
                else            /* DM9102/DM9102A */
                        phy_mode =
                            phy_read(BASE, db->phy_addr, 17,
                                     db->chip_id) & 0xf000;
                /* printk(DRV_NAME ": Phy_mode %x ",phy_mode); */
                switch (phy_mode) {
                case 0x1000:
                        db->op_mode = DMFE_10MHF;
                        break;
                case 0x2000:
                        db->op_mode = DMFE_10MFD;
                        break;
                case 0x4000:
                        db->op_mode = DMFE_100MHF;
                        break;
                case 0x8000:
                        db->op_mode = DMFE_100MFD;
                        break;
                default:
                        db->op_mode = DMFE_10MHF;
                        ErrFlag = 1;
                        break;
                }
        } else {
                db->op_mode = DMFE_10MHF;
                //DMFE_DBUG(0, "Link Failed :", phy_mode);
                ErrFlag = 1;
        }

        return ErrFlag;
}
#endif

/*
 *      Set 10/100 phyxcer capability
 *      AUTO mode : phyxcer register4 is NIC capability
 *      Force mode: phyxcer register4 is the force media
 */

static void dmfe_set_phyxcer(struct nic *nic __unused)
{
        u16 phy_reg;

        /* Select 10/100M phyxcer */
        db->cr6_data &= ~0x40000;
        update_cr6(db->cr6_data, BASE);

        /* DM9009 Chip: Phyxcer reg18 bit12=0 */
        if (db->chip_id == PCI_DM9009_ID) {
                phy_reg =
                    phy_read(BASE, db->phy_addr, 18,
                             db->chip_id) & ~0x1000;
                phy_write(BASE, db->phy_addr, 18, phy_reg, db->chip_id);
        }

        /* Phyxcer capability setting */
        phy_reg = phy_read(BASE, db->phy_addr, 4, db->chip_id) & ~0x01e0;

        if (db->media_mode & DMFE_AUTO) {
                /* AUTO Mode */
                phy_reg |= db->PHY_reg4;
        } else {
                /* Force Mode */
                switch (db->media_mode) {
                case DMFE_10MHF:
                        phy_reg |= 0x20;
                        break;
                case DMFE_10MFD:
                        phy_reg |= 0x40;
                        break;
                case DMFE_100MHF:
                        phy_reg |= 0x80;
                        break;
                case DMFE_100MFD:
                        phy_reg |= 0x100;
                        break;
                }
                if (db->chip_id == PCI_DM9009_ID)
                        phy_reg &= 0x61;
        }

        /* Write new capability to Phyxcer Reg4 */
        if (!(phy_reg & 0x01e0)) {
                phy_reg |= db->PHY_reg4;
                db->media_mode |= DMFE_AUTO;
        }
        phy_write(BASE, db->phy_addr, 4, phy_reg, db->chip_id);

        /* Restart Auto-Negotiation */
        if (db->chip_type && (db->chip_id == PCI_DM9102_ID))
                phy_write(BASE, db->phy_addr, 0, 0x1800, db->chip_id);
        if (!db->chip_type)
                phy_write(BASE, db->phy_addr, 0, 0x1200, db->chip_id);
}


/*
 *      Process op-mode
 *      AUTO mode : PHY controller in Auto-negotiation Mode
 *      Force mode: PHY controller in force mode with HUB
 *                      N-way force capability with SWITCH
 */

#if 0 /* not used */
static void dmfe_process_mode(struct nic *nic __unused)
{
        u16 phy_reg;

        /* Full Duplex Mode Check */
        if (db->op_mode & 0x4)
                db->cr6_data |= CR6_FDM;        /* Set Full Duplex Bit */
        else
                db->cr6_data &= ~CR6_FDM;       /* Clear Full Duplex Bit */

        /* Transciver Selection */
        if (db->op_mode & 0x10) /* 1M HomePNA */
                db->cr6_data |= 0x40000;        /* External MII select */
        else
                db->cr6_data &= ~0x40000;       /* Internal 10/100 transciver */

        update_cr6(db->cr6_data, BASE);

        /* 10/100M phyxcer force mode need */
        if (!(db->media_mode & 0x18)) {
                /* Forece Mode */
                phy_reg = phy_read(BASE, db->phy_addr, 6, db->chip_id);
                if (!(phy_reg & 0x1)) {
                        /* parter without N-Way capability */
                        phy_reg = 0x0;
                        switch (db->op_mode) {
                        case DMFE_10MHF:
                                phy_reg = 0x0;
                                break;
                        case DMFE_10MFD:
                                phy_reg = 0x100;
                                break;
                        case DMFE_100MHF:
                                phy_reg = 0x2000;
                                break;
                        case DMFE_100MFD:
                                phy_reg = 0x2100;
                                break;
                        }
                        phy_write(BASE, db->phy_addr, 0, phy_reg,
                                  db->chip_id);
                        if (db->chip_type
                            && (db->chip_id == PCI_DM9102_ID))
                                mdelay(20);
                        phy_write(BASE, db->phy_addr, 0, phy_reg,
                                  db->chip_id);
                }
        }
}
#endif

/*
 *      Write a word to Phy register
 */

static void phy_write(unsigned long iobase, u8 phy_addr, u8 offset,
                      u16 phy_data, u32 chip_id)
{
        u16 i;
        unsigned long ioaddr;

        if (chip_id == PCI_DM9132_ID) {
                ioaddr = iobase + 0x80 + offset * 4;
                outw(phy_data, ioaddr);
        } else {
                /* DM9102/DM9102A Chip */
                ioaddr = iobase + DCR9;

                /* Send 33 synchronization clock to Phy controller */
                for (i = 0; i < 35; i++)
                        phy_write_1bit(ioaddr, PHY_DATA_1);

                /* Send start command(01) to Phy */
                phy_write_1bit(ioaddr, PHY_DATA_0);
                phy_write_1bit(ioaddr, PHY_DATA_1);

                /* Send write command(01) to Phy */
                phy_write_1bit(ioaddr, PHY_DATA_0);
                phy_write_1bit(ioaddr, PHY_DATA_1);

                /* Send Phy addres */
                for (i = 0x10; i > 0; i = i >> 1)
                        phy_write_1bit(ioaddr,
                                       phy_addr & i ? PHY_DATA_1 :
                                       PHY_DATA_0);

                /* Send register addres */
                for (i = 0x10; i > 0; i = i >> 1)
                        phy_write_1bit(ioaddr,
                                       offset & i ? PHY_DATA_1 :
                                       PHY_DATA_0);

                /* written trasnition */
                phy_write_1bit(ioaddr, PHY_DATA_1);
                phy_write_1bit(ioaddr, PHY_DATA_0);

                /* Write a word data to PHY controller */
                for (i = 0x8000; i > 0; i >>= 1)
                        phy_write_1bit(ioaddr,
                                       phy_data & i ? PHY_DATA_1 :
                                       PHY_DATA_0);
        }
}


/*
 *      Read a word data from phy register
 */

static u16 phy_read(unsigned long iobase, u8 phy_addr, u8 offset,
                    u32 chip_id)
{
        int i;
        u16 phy_data;
        unsigned long ioaddr;

        if (chip_id == PCI_DM9132_ID) {
                /* DM9132 Chip */
                ioaddr = iobase + 0x80 + offset * 4;
                phy_data = inw(ioaddr);
        } else {
                /* DM9102/DM9102A Chip */
                ioaddr = iobase + DCR9;

                /* Send 33 synchronization clock to Phy controller */
                for (i = 0; i < 35; i++)
                        phy_write_1bit(ioaddr, PHY_DATA_1);

                /* Send start command(01) to Phy */
                phy_write_1bit(ioaddr, PHY_DATA_0);
                phy_write_1bit(ioaddr, PHY_DATA_1);

                /* Send read command(10) to Phy */
                phy_write_1bit(ioaddr, PHY_DATA_1);
                phy_write_1bit(ioaddr, PHY_DATA_0);

                /* Send Phy addres */
                for (i = 0x10; i > 0; i = i >> 1)
                        phy_write_1bit(ioaddr,
                                       phy_addr & i ? PHY_DATA_1 :
                                       PHY_DATA_0);

                /* Send register addres */
                for (i = 0x10; i > 0; i = i >> 1)
                        phy_write_1bit(ioaddr,
                                       offset & i ? PHY_DATA_1 :
                                       PHY_DATA_0);

                /* Skip transition state */
                phy_read_1bit(ioaddr);

                /* read 16bit data */
                for (phy_data = 0, i = 0; i < 16; i++) {
                        phy_data <<= 1;
                        phy_data |= phy_read_1bit(ioaddr);
                }
        }

        return phy_data;
}


/*
 *      Write one bit data to Phy Controller
 */

static void phy_write_1bit(unsigned long ioaddr, u32 phy_data)
{
        outl(phy_data, ioaddr); /* MII Clock Low */
        udelay(1);
        outl(phy_data | MDCLKH, ioaddr);        /* MII Clock High */
        udelay(1);
        outl(phy_data, ioaddr); /* MII Clock Low */
        udelay(1);
}


/*
 *      Read one bit phy data from PHY controller
 */

static u16 phy_read_1bit(unsigned long ioaddr)
{
        u16 phy_data;

        outl(0x50000, ioaddr);
        udelay(1);
        phy_data = (inl(ioaddr) >> 19) & 0x1;
        outl(0x40000, ioaddr);
        udelay(1);

        return phy_data;
}


/*
 *      Parser SROM and media mode
 */

static void dmfe_parse_srom(struct nic *nic)
{
        unsigned char *srom = db->srom;
        int dmfe_mode, tmp_reg;

        /* Init CR15 */
        db->cr15_data = CR15_DEFAULT;

        /* Check SROM Version */
        if (((int) srom[18] & 0xff) == SROM_V41_CODE) {
                /* SROM V4.01 */
                /* Get NIC support media mode */
                db->NIC_capability = *(u16 *) (srom + 34);
                db->PHY_reg4 = 0;
                for (tmp_reg = 1; tmp_reg < 0x10; tmp_reg <<= 1) {
                        switch (db->NIC_capability & tmp_reg) {
                        case 0x1:
                                db->PHY_reg4 |= 0x0020;
                                break;
                        case 0x2:
                                db->PHY_reg4 |= 0x0040;
                                break;
                        case 0x4:
                                db->PHY_reg4 |= 0x0080;
                                break;
                        case 0x8:
                                db->PHY_reg4 |= 0x0100;
                                break;
                        }
                }

                /* Media Mode Force or not check */
                dmfe_mode = *((int *) srom + 34) & *((int *) srom + 36);
                switch (dmfe_mode) {
                case 0x4:
                        dmfe_media_mode = DMFE_100MHF;
                        break;  /* 100MHF */
                case 0x2:
                        dmfe_media_mode = DMFE_10MFD;
                        break;  /* 10MFD */
                case 0x8:
                        dmfe_media_mode = DMFE_100MFD;
                        break;  /* 100MFD */
                case 0x100:
                case 0x200:
                        dmfe_media_mode = DMFE_1M_HPNA;
                        break;  /* HomePNA */
                }

                /* Special Function setting */
                /* VLAN function */
                if ((SF_mode & 0x1) || (srom[43] & 0x80))
                        db->cr15_data |= 0x40;

                /* Flow Control */
                if ((SF_mode & 0x2) || (srom[40] & 0x1))
                        db->cr15_data |= 0x400;

                /* TX pause packet */
                if ((SF_mode & 0x4) || (srom[40] & 0xe))
                        db->cr15_data |= 0x9800;
        }

        /* Parse HPNA parameter */
        db->HPNA_command = 1;

        /* Accept remote command or not */
        if (HPNA_rx_cmd == 0)
                db->HPNA_command |= 0x8000;

        /* Issue remote command & operation mode */
        if (HPNA_tx_cmd == 1)
                switch (HPNA_mode) {    /* Issue Remote Command */
                case 0:
                        db->HPNA_command |= 0x0904;
                        break;
                case 1:
                        db->HPNA_command |= 0x0a00;
                        break;
                case 2:
                        db->HPNA_command |= 0x0506;
                        break;
                case 3:
                        db->HPNA_command |= 0x0602;
                        break;
        } else
                switch (HPNA_mode) {    /* Don't Issue */
                case 0:
                        db->HPNA_command |= 0x0004;
                        break;
                case 1:
                        db->HPNA_command |= 0x0000;
                        break;
                case 2:
                        db->HPNA_command |= 0x0006;
                        break;
                case 3:
                        db->HPNA_command |= 0x0002;
                        break;
                }

        /* Check DM9801 or DM9802 present or not */
        db->HPNA_present = 0;
        update_cr6(db->cr6_data | 0x40000, BASE);
        tmp_reg = phy_read(BASE, db->phy_addr, 3, db->chip_id);
        if ((tmp_reg & 0xfff0) == 0xb900) {
                /* DM9801 or DM9802 present */
                db->HPNA_timer = 8;
                if (phy_read(BASE, db->phy_addr, 31, db->chip_id) ==
                    0x4404) {
                        /* DM9801 HomeRun */
                        db->HPNA_present = 1;
                        dmfe_program_DM9801(nic, tmp_reg);
                } else {
                        /* DM9802 LongRun */
                        db->HPNA_present = 2;
                        dmfe_program_DM9802(nic);
                }
        }

}

/*
 *      Init HomeRun DM9801
 */

static void dmfe_program_DM9801(struct nic *nic __unused, int HPNA_rev)
{
        u32 reg17, reg25;

        if (!HPNA_NoiseFloor)
                HPNA_NoiseFloor = DM9801_NOISE_FLOOR;
        switch (HPNA_rev) {
        case 0xb900:            /* DM9801 E3 */
                db->HPNA_command |= 0x1000;
                reg25 = phy_read(BASE, db->phy_addr, 24, db->chip_id);
                reg25 = ((reg25 + HPNA_NoiseFloor) & 0xff) | 0xf000;
                reg17 = phy_read(BASE, db->phy_addr, 17, db->chip_id);
                break;
        case 0xb901:            /* DM9801 E4 */
                reg25 = phy_read(BASE, db->phy_addr, 25, db->chip_id);
                reg25 = (reg25 & 0xff00) + HPNA_NoiseFloor;
                reg17 = phy_read(BASE, db->phy_addr, 17, db->chip_id);
                reg17 = (reg17 & 0xfff0) + HPNA_NoiseFloor + 3;
                break;
        case 0xb902:            /* DM9801 E5 */
        case 0xb903:            /* DM9801 E6 */
        default:
                db->HPNA_command |= 0x1000;
                reg25 = phy_read(BASE, db->phy_addr, 25, db->chip_id);
                reg25 = (reg25 & 0xff00) + HPNA_NoiseFloor - 5;
                reg17 = phy_read(BASE, db->phy_addr, 17, db->chip_id);
                reg17 = (reg17 & 0xfff0) + HPNA_NoiseFloor;
                break;
        }
        phy_write(BASE, db->phy_addr, 16, db->HPNA_command, db->chip_id);
        phy_write(BASE, db->phy_addr, 17, reg17, db->chip_id);
        phy_write(BASE, db->phy_addr, 25, reg25, db->chip_id);
}


/*
 *      Init HomeRun DM9802
 */

static void dmfe_program_DM9802(struct nic *nic __unused)
{
        u32 phy_reg;

        if (!HPNA_NoiseFloor)
                HPNA_NoiseFloor = DM9802_NOISE_FLOOR;
        phy_write(BASE, db->phy_addr, 16, db->HPNA_command, db->chip_id);
        phy_reg = phy_read(BASE, db->phy_addr, 25, db->chip_id);
        phy_reg = (phy_reg & 0xff00) + HPNA_NoiseFloor;
        phy_write(BASE, db->phy_addr, 25, phy_reg, db->chip_id);
}

static struct nic_operations dmfe_operations = {
        .connect        = dummy_connect,
        .poll           = dmfe_poll,
        .transmit       = dmfe_transmit,
        .irq            = dmfe_irq,

};

static struct pci_device_id dmfe_nics[] = {
        PCI_ROM(0x1282, 0x9100, "dmfe9100", "Davicom 9100", 0),
        PCI_ROM(0x1282, 0x9102, "dmfe9102", "Davicom 9102", 0),
        PCI_ROM(0x1282, 0x9009, "dmfe9009", "Davicom 9009", 0),
        PCI_ROM(0x1282, 0x9132, "dmfe9132", "Davicom 9132", 0), /* Needs probably some fixing */
};

PCI_DRIVER ( dmfe_driver, dmfe_nics, PCI_NO_CLASS );

DRIVER ( "DMFE/PCI", nic_driver, pci_driver, dmfe_driver,
         dmfe_probe, dmfe_disable );

/*
 * Local variables:
 *  c-basic-offset: 8
 *  c-indent-level: 8
 *  tab-width: 8
 * End:
 */