[linux.git] / drivers / net / 7990.c

/*
 * 7990.c -- LANCE ethernet IC generic routines.
 * This is an attempt to separate out the bits of various ethernet
 * drivers that are common because they all use the AMD 7990 LANCE
 * (Local Area Network Controller for Ethernet) chip.
 *
 * Copyright (C) 05/1998 Peter Maydell <[email protected]>
 *
 * Most of this stuff was obtained by looking at other LANCE drivers,
 * in particular a2065.[ch]. The AMD C-LANCE datasheet was also helpful.
 * NB: this was made easy by the fact that Jes Sorensen had cleaned up
 * most of a2025 and sunlance with the aim of merging them, so the
 * common code was pretty obvious.
 */
#include <linux/crc32.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/route.h>
#include <linux/string.h>
#include <linux/skbuff.h>
#include <asm/irq.h>
/* Used for the temporal inet entries and routing */
#include <linux/socket.h>
#include <linux/bitops.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/pgtable.h>
#ifdef CONFIG_HP300
#include <asm/blinken.h>
#endif

#include "7990.h"

#define WRITERAP(lp,x) out_be16(lp->base + LANCE_RAP, (x))
#define WRITERDP(lp,x) out_be16(lp->base + LANCE_RDP, (x))
#define READRDP(lp) in_be16(lp->base + LANCE_RDP)

#if defined(CONFIG_HPLANCE) || defined(CONFIG_HPLANCE_MODULE)
#include "hplance.h"

#undef WRITERAP
#undef WRITERDP
#undef READRDP

#if defined(CONFIG_MVME147_NET) || defined(CONFIG_MVME147_NET_MODULE)

/* Lossage Factor Nine, Mr Sulu. */
#define WRITERAP(lp,x) (lp->writerap(lp,x))
#define WRITERDP(lp,x) (lp->writerdp(lp,x))
#define READRDP(lp) (lp->readrdp(lp))

#else

/* These inlines can be used if only CONFIG_HPLANCE is defined */
static inline void WRITERAP(struct lance_private *lp, __u16 value)
{
	do {
		out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
}

static inline void WRITERDP(struct lance_private *lp, __u16 value)
{
	do {
		out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
}

static inline __u16 READRDP(struct lance_private *lp)
{
	__u16 value;
	do {
		value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	return value;
}

#endif
#endif /* CONFIG_HPLANCE || CONFIG_HPLANCE_MODULE */

/* debugging output macros, various flavours */
/* #define TEST_HITS */
#ifdef UNDEF
#define PRINT_RINGS() \
do { \
        int t; \
        for (t=0; t < RX_RING_SIZE; t++) { \
                printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n",\
                       t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0,\
                       ib->brx_ring[t].length,\
                       ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits);\
        }\
        for (t=0; t < TX_RING_SIZE; t++) { \
                printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n",\
                       t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0,\
                       ib->btx_ring[t].length,\
                       ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits);\
        }\
} while (0)
#else
#define PRINT_RINGS()
#endif

/* Load the CSR registers. The LANCE has to be STOPped when we do this! */
static void load_csrs (struct lance_private *lp)
{
        volatile struct lance_init_block *aib = lp->lance_init_block;
        int leptr;

        leptr = LANCE_ADDR (aib);

        WRITERAP(lp, LE_CSR1);                    /* load address of init block */
        WRITERDP(lp, leptr & 0xFFFF);
        WRITERAP(lp, LE_CSR2);
        WRITERDP(lp, leptr >> 16);
        WRITERAP(lp, LE_CSR3);
        WRITERDP(lp, lp->busmaster_regval);       /* set byteswap/ALEctrl/byte ctrl */

        /* Point back to csr0 */
        WRITERAP(lp, LE_CSR0);
}

/* #define to 0 or 1 appropriately */
#define DEBUG_IRING 0
/* Set up the Lance Rx and Tx rings and the init block */
static void lance_init_ring (struct net_device *dev)
{
        struct lance_private *lp = netdev_priv(dev);
        volatile struct lance_init_block *ib = lp->init_block;
        volatile struct lance_init_block *aib; /* for LANCE_ADDR computations */
        int leptr;
        int i;

        aib = lp->lance_init_block;

        lp->rx_new = lp->tx_new = 0;
        lp->rx_old = lp->tx_old = 0;

        ib->mode = LE_MO_PROM;                             /* normal, enable Tx & Rx */

        /* Copy the ethernet address to the lance init block
         * Notice that we do a byteswap if we're big endian.
         * [I think this is the right criterion; at least, sunlance,
         * a2065 and atarilance do the byteswap and lance.c (PC) doesn't.
         * However, the datasheet says that the BSWAP bit doesn't affect
         * the init block, so surely it should be low byte first for
         * everybody? Um.]
         * We could define the ib->physaddr as three 16bit values and
         * use (addr[1] << 8) | addr[0] & co, but this is more efficient.
         */
#ifdef __BIG_ENDIAN
        ib->phys_addr [0] = dev->dev_addr [1];
        ib->phys_addr [1] = dev->dev_addr [0];
        ib->phys_addr [2] = dev->dev_addr [3];
        ib->phys_addr [3] = dev->dev_addr [2];
        ib->phys_addr [4] = dev->dev_addr [5];
        ib->phys_addr [5] = dev->dev_addr [4];
#else
        for (i=0; i<6; i++)
           ib->phys_addr[i] = dev->dev_addr[i];
#endif

        if (DEBUG_IRING)
                printk ("TX rings:\n");

	lp->tx_full = 0;
        /* Setup the Tx ring entries */
        for (i = 0; i < (1<<lp->lance_log_tx_bufs); i++) {
                leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
                ib->btx_ring [i].tmd0      = leptr;
                ib->btx_ring [i].tmd1_hadr = leptr >> 16;
                ib->btx_ring [i].tmd1_bits = 0;
                ib->btx_ring [i].length    = 0xf000; /* The ones required by tmd2 */
                ib->btx_ring [i].misc      = 0;
                if (DEBUG_IRING)
                   printk ("%d: 0x%8.8x\n", i, leptr);
        }

        /* Setup the Rx ring entries */
        if (DEBUG_IRING)
                printk ("RX rings:\n");
        for (i = 0; i < (1<<lp->lance_log_rx_bufs); i++) {
                leptr = LANCE_ADDR(&aib->rx_buf[i][0]);

                ib->brx_ring [i].rmd0      = leptr;
                ib->brx_ring [i].rmd1_hadr = leptr >> 16;
                ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
                /* 0xf000 == bits that must be one (reserved, presumably) */
                ib->brx_ring [i].length    = -RX_BUFF_SIZE | 0xf000;
                ib->brx_ring [i].mblength  = 0;
                if (DEBUG_IRING)
                        printk ("%d: 0x%8.8x\n", i, leptr);
        }

        /* Setup the initialization block */

        /* Setup rx descriptor pointer */
        leptr = LANCE_ADDR(&aib->brx_ring);
        ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
        ib->rx_ptr = leptr;
        if (DEBUG_IRING)
                printk ("RX ptr: %8.8x\n", leptr);

        /* Setup tx descriptor pointer */
        leptr = LANCE_ADDR(&aib->btx_ring);
        ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
        ib->tx_ptr = leptr;
        if (DEBUG_IRING)
                printk ("TX ptr: %8.8x\n", leptr);

        /* Clear the multicast filter */
        ib->filter [0] = 0;
        ib->filter [1] = 0;
        PRINT_RINGS();
}

/* LANCE must be STOPped before we do this, too... */
static int init_restart_lance (struct lance_private *lp)
{
        int i;

        WRITERAP(lp, LE_CSR0);
        WRITERDP(lp, LE_C0_INIT);

        /* Need a hook here for sunlance ledma stuff */

        /* Wait for the lance to complete initialization */
        for (i = 0; (i < 100) && !(READRDP(lp) & (LE_C0_ERR | LE_C0_IDON)); i++)
                barrier();
        if ((i == 100) || (READRDP(lp) & LE_C0_ERR)) {
                printk ("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, READRDP(lp));
                return -1;
        }

        /* Clear IDON by writing a "1", enable interrupts and start lance */
        WRITERDP(lp, LE_C0_IDON);
        WRITERDP(lp, LE_C0_INEA | LE_C0_STRT);

        return 0;
}

static int lance_reset (struct net_device *dev)
{
        struct lance_private *lp = netdev_priv(dev);
        int status;

        /* Stop the lance */
        WRITERAP(lp, LE_CSR0);
        WRITERDP(lp, LE_C0_STOP);

        load_csrs (lp);
        lance_init_ring (dev);
        dev->trans_start = jiffies; /* prevent tx timeout */
        status = init_restart_lance (lp);
#ifdef DEBUG_DRIVER
        printk ("Lance restart=%d\n", status);
#endif
        return status;
}

static int lance_rx (struct net_device *dev)
{
        struct lance_private *lp = netdev_priv(dev);
        volatile struct lance_init_block *ib = lp->init_block;
        volatile struct lance_rx_desc *rd;
        unsigned char bits;
#ifdef TEST_HITS
        int i;
#endif

#ifdef TEST_HITS
        printk ("[");
        for (i = 0; i < RX_RING_SIZE; i++) {
                if (i == lp->rx_new)
                        printk ("%s",
                                ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "_" : "X");
                else
                        printk ("%s",
                                ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "." : "1");
        }
        printk ("]");
#endif
#ifdef CONFIG_HP300
	blinken_leds(0x40, 0);
#endif
        WRITERDP(lp, LE_C0_RINT | LE_C0_INEA);     /* ack Rx int, reenable ints */
        for (rd = &ib->brx_ring [lp->rx_new];     /* For each Rx ring we own... */
             !((bits = rd->rmd1_bits) & LE_R1_OWN);
             rd = &ib->brx_ring [lp->rx_new]) {

                /* We got an incomplete frame? */
                if ((bits & LE_R1_POK) != LE_R1_POK) {
                        dev->stats.rx_over_errors++;
                        dev->stats.rx_errors++;
                        continue;
                } else if (bits & LE_R1_ERR) {
                        /* Count only the end frame as a rx error,
                         * not the beginning
                         */
                        if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
                        if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
                        if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
                        if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
                        if (bits & LE_R1_EOP) dev->stats.rx_errors++;
                } else {
			int len = (rd->mblength & 0xfff) - 4;
			struct sk_buff *skb = dev_alloc_skb (len+2);

                        if (!skb) {
                                printk ("%s: Memory squeeze, deferring packet.\n",
                                        dev->name);
                                dev->stats.rx_dropped++;
                                rd->mblength = 0;
                                rd->rmd1_bits = LE_R1_OWN;
                                lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
                                return 0;
                        }

                        skb_reserve (skb, 2);           /* 16 byte align */
                        skb_put (skb, len);             /* make room */
                        skb_copy_to_linear_data(skb,
                                         (unsigned char *)&(ib->rx_buf [lp->rx_new][0]),
                                         len);
                        skb->protocol = eth_type_trans (skb, dev);
			netif_rx (skb);
			dev->stats.rx_packets++;
			dev->stats.rx_bytes += len;
                }

                /* Return the packet to the pool */
                rd->mblength = 0;
                rd->rmd1_bits = LE_R1_OWN;
                lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
        }
        return 0;
}

static int lance_tx (struct net_device *dev)
{
        struct lance_private *lp = netdev_priv(dev);
        volatile struct lance_init_block *ib = lp->init_block;
        volatile struct lance_tx_desc *td;
        int i, j;
        int status;

#ifdef CONFIG_HP300
	blinken_leds(0x80, 0);
#endif
        /* csr0 is 2f3 */
        WRITERDP(lp, LE_C0_TINT | LE_C0_INEA);
        /* csr0 is 73 */

        j = lp->tx_old;
        for (i = j; i != lp->tx_new; i = j) {
                td = &ib->btx_ring [i];

                /* If we hit a packet not owned by us, stop */
                if (td->tmd1_bits & LE_T1_OWN)
                        break;

                if (td->tmd1_bits & LE_T1_ERR) {
                        status = td->misc;

                        dev->stats.tx_errors++;
                        if (status & LE_T3_RTY)  dev->stats.tx_aborted_errors++;
                        if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;

                        if (status & LE_T3_CLOS) {
                                dev->stats.tx_carrier_errors++;
                                if (lp->auto_select) {
                                        lp->tpe = 1 - lp->tpe;
                                        printk("%s: Carrier Lost, trying %s\n",
                                               dev->name, lp->tpe?"TPE":"AUI");
                                        /* Stop the lance */
                                        WRITERAP(lp, LE_CSR0);
                                        WRITERDP(lp, LE_C0_STOP);
                                        lance_init_ring (dev);
                                        load_csrs (lp);
                                        init_restart_lance (lp);
                                        return 0;
                                }
                        }

                        /* buffer errors and underflows turn off the transmitter */
                        /* Restart the adapter */
                        if (status & (LE_T3_BUF|LE_T3_UFL)) {
                                dev->stats.tx_fifo_errors++;

                                printk ("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
                                        dev->name);
                                /* Stop the lance */
                                WRITERAP(lp, LE_CSR0);
                                WRITERDP(lp, LE_C0_STOP);
                                lance_init_ring (dev);
                                load_csrs (lp);
                                init_restart_lance (lp);
                                return 0;
                        }
                } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
                        /*
                         * So we don't count the packet more than once.
                         */
                        td->tmd1_bits &= ~(LE_T1_POK);

                        /* One collision before packet was sent. */
                        if (td->tmd1_bits & LE_T1_EONE)
                                dev->stats.collisions++;

                        /* More than one collision, be optimistic. */
                        if (td->tmd1_bits & LE_T1_EMORE)
                                dev->stats.collisions += 2;

                        dev->stats.tx_packets++;
                }

                j = (j + 1) & lp->tx_ring_mod_mask;
        }
        lp->tx_old = j;
        WRITERDP(lp, LE_C0_TINT | LE_C0_INEA);
        return 0;
}

static irqreturn_t
lance_interrupt (int irq, void *dev_id)
{
        struct net_device *dev = (struct net_device *)dev_id;
        struct lance_private *lp = netdev_priv(dev);
        int csr0;

	spin_lock (&lp->devlock);

        WRITERAP(lp, LE_CSR0);              /* LANCE Controller Status */
        csr0 = READRDP(lp);

        PRINT_RINGS();

        if (!(csr0 & LE_C0_INTR)) {     /* Check if any interrupt has */
		spin_unlock (&lp->devlock);
                return IRQ_NONE;        /* been generated by the Lance. */
	}

        /* Acknowledge all the interrupt sources ASAP */
        WRITERDP(lp, csr0 & ~(LE_C0_INEA|LE_C0_TDMD|LE_C0_STOP|LE_C0_STRT|LE_C0_INIT));

        if ((csr0 & LE_C0_ERR)) {
                /* Clear the error condition */
                WRITERDP(lp, LE_C0_BABL|LE_C0_ERR|LE_C0_MISS|LE_C0_INEA);
        }

        if (csr0 & LE_C0_RINT)
                lance_rx (dev);

        if (csr0 & LE_C0_TINT)
                lance_tx (dev);

        /* Log misc errors. */
        if (csr0 & LE_C0_BABL)
                dev->stats.tx_errors++;       /* Tx babble. */
        if (csr0 & LE_C0_MISS)
                dev->stats.rx_errors++;       /* Missed a Rx frame. */
        if (csr0 & LE_C0_MERR) {
                printk("%s: Bus master arbitration failure, status %4.4x.\n",
                       dev->name, csr0);
                /* Restart the chip. */
                WRITERDP(lp, LE_C0_STRT);
        }

        if (lp->tx_full && netif_queue_stopped(dev) && (TX_BUFFS_AVAIL >= 0)) {
		lp->tx_full = 0;
		netif_wake_queue (dev);
        }

        WRITERAP(lp, LE_CSR0);
        WRITERDP(lp, LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_MERR|LE_C0_IDON|LE_C0_INEA);

	spin_unlock (&lp->devlock);
	return IRQ_HANDLED;
}

int lance_open (struct net_device *dev)
{
        struct lance_private *lp = netdev_priv(dev);
	int res;

        /* Install the Interrupt handler. Or we could shunt this out to specific drivers? */
        if (request_irq(lp->irq, lance_interrupt, IRQF_SHARED, lp->name, dev))
                return -EAGAIN;

        res = lance_reset(dev);
	spin_lock_init(&lp->devlock);
	netif_start_queue (dev);

	return res;
}
EXPORT_SYMBOL_GPL(lance_open);

int lance_close (struct net_device *dev)
{
        struct lance_private *lp = netdev_priv(dev);

	netif_stop_queue (dev);

        /* Stop the LANCE */
        WRITERAP(lp, LE_CSR0);
        WRITERDP(lp, LE_C0_STOP);

        free_irq(lp->irq, dev);

        return 0;
}
EXPORT_SYMBOL_GPL(lance_close);

void lance_tx_timeout(struct net_device *dev)
{
	printk("lance_tx_timeout\n");
	lance_reset(dev);
	dev->trans_start = jiffies; /* prevent tx timeout */
	netif_wake_queue (dev);
}
EXPORT_SYMBOL_GPL(lance_tx_timeout);

int lance_start_xmit (struct sk_buff *skb, struct net_device *dev)
{
        struct lance_private *lp = netdev_priv(dev);
        volatile struct lance_init_block *ib = lp->init_block;
        int entry, skblen, len;
        static int outs;
	unsigned long flags;

        if (!TX_BUFFS_AVAIL)
                return NETDEV_TX_LOCKED;

	netif_stop_queue (dev);

        skblen = skb->len;

#ifdef DEBUG_DRIVER
        /* dump the packet */
        {
                int i;

                for (i = 0; i < 64; i++) {
                        if ((i % 16) == 0)
                                printk ("\n");
                        printk ("%2.2x ", skb->data [i]);
                }
        }
#endif
        len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
        entry = lp->tx_new & lp->tx_ring_mod_mask;
        ib->btx_ring [entry].length = (-len) | 0xf000;
        ib->btx_ring [entry].misc = 0;

	if (skb->len < ETH_ZLEN)
		memset((void *)&ib->tx_buf[entry][0], 0, ETH_ZLEN);
        skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen);

        /* Now, give the packet to the lance */
        ib->btx_ring [entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
        lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;

        outs++;
        /* Kick the lance: transmit now */
        WRITERDP(lp, LE_C0_INEA | LE_C0_TDMD);
        dev_kfree_skb (skb);

	spin_lock_irqsave (&lp->devlock, flags);
        if (TX_BUFFS_AVAIL)
		netif_start_queue (dev);
	else
		lp->tx_full = 1;
	spin_unlock_irqrestore (&lp->devlock, flags);

        return NETDEV_TX_OK;
}
EXPORT_SYMBOL_GPL(lance_start_xmit);

/* taken from the depca driver via a2065.c */
static void lance_load_multicast (struct net_device *dev)
{
        struct lance_private *lp = netdev_priv(dev);
        volatile struct lance_init_block *ib = lp->init_block;
        volatile u16 *mcast_table = (u16 *)&ib->filter;
	struct netdev_hw_addr *ha;
        char *addrs;
        u32 crc;

        /* set all multicast bits */
        if (dev->flags & IFF_ALLMULTI){
                ib->filter [0] = 0xffffffff;
                ib->filter [1] = 0xffffffff;
                return;
        }
        /* clear the multicast filter */
        ib->filter [0] = 0;
        ib->filter [1] = 0;

        /* Add addresses */
	netdev_for_each_mc_addr(ha, dev) {
		addrs = ha->addr;

                /* multicast address? */
                if (!(*addrs & 1))
                        continue;

		crc = ether_crc_le(6, addrs);
                crc = crc >> 26;
                mcast_table [crc >> 4] |= 1 << (crc & 0xf);
        }
}


void lance_set_multicast (struct net_device *dev)
{
        struct lance_private *lp = netdev_priv(dev);
        volatile struct lance_init_block *ib = lp->init_block;
	int stopped;

	stopped = netif_queue_stopped(dev);
	if (!stopped)
		netif_stop_queue (dev);

        while (lp->tx_old != lp->tx_new)
                schedule();

        WRITERAP(lp, LE_CSR0);
        WRITERDP(lp, LE_C0_STOP);
        lance_init_ring (dev);

        if (dev->flags & IFF_PROMISC) {
                ib->mode |= LE_MO_PROM;
        } else {
                ib->mode &= ~LE_MO_PROM;
                lance_load_multicast (dev);
        }
        load_csrs (lp);
        init_restart_lance (lp);

	if (!stopped)
		netif_start_queue (dev);
}
EXPORT_SYMBOL_GPL(lance_set_multicast);

#ifdef CONFIG_NET_POLL_CONTROLLER
void lance_poll(struct net_device *dev)
{
	struct lance_private *lp = netdev_priv(dev);

	spin_lock (&lp->devlock);
	WRITERAP(lp, LE_CSR0);
	WRITERDP(lp, LE_C0_STRT);
	spin_unlock (&lp->devlock);
	lance_interrupt(dev->irq, dev);
}
#endif

MODULE_LICENSE("GPL");
Commit	Line	Data
6aa20a22 JG	1	/*
6aa20a22 JG	2	* 7990.c -- LANCE ethernet IC generic routines.
1da177e4	3	* This is an attempt to separate out the bits of various ethernet
6aa20a22	4	* drivers that are common because they all use the AMD 7990 LANCE
1da177e4 LT	5	* (Local Area Network Controller for Ethernet) chip.
	6	*
	7	* Copyright (C) 05/1998 Peter Maydell <[email protected]>
	8	*
	9	* Most of this stuff was obtained by looking at other LANCE drivers,
	10	* in particular a2065.[ch]. The AMD C-LANCE datasheet was also helpful.
	11	* NB: this was made easy by the fact that Jes Sorensen had cleaned up
6aa20a22	12	* most of a2025 and sunlance with the aim of merging them, so the
1da177e4 LT	13	* common code was pretty obvious.
	14	*/
	15	#include <linux/crc32.h>
	16	#include <linux/delay.h>
	17	#include <linux/errno.h>
	18	#include <linux/netdevice.h>
	19	#include <linux/etherdevice.h>
	20	#include <linux/init.h>
	21	#include <linux/module.h>
	22	#include <linux/kernel.h>
	23	#include <linux/types.h>
	24	#include <linux/fcntl.h>
	25	#include <linux/interrupt.h>
	26	#include <linux/ioport.h>
	27	#include <linux/in.h>
	28	#include <linux/route.h>
1da177e4 LT	29	#include <linux/string.h>
1da177e4 LT	30	#include <linux/skbuff.h>
3c139586	31	#include <asm/irq.h>
1da177e4 LT	32	/* Used for the temporal inet entries and routing */
	33	#include <linux/socket.h>
	34	#include <linux/bitops.h>
	35
	36	#include <asm/system.h>
	37	#include <asm/io.h>
	38	#include <asm/dma.h>
	39	#include <asm/pgtable.h>
	40	#ifdef CONFIG_HP300
	41	#include <asm/blinken.h>
	42	#endif
	43
	44	#include "7990.h"
	45
	46	#define WRITERAP(lp,x) out_be16(lp->base + LANCE_RAP, (x))
	47	#define WRITERDP(lp,x) out_be16(lp->base + LANCE_RDP, (x))
	48	#define READRDP(lp) in_be16(lp->base + LANCE_RDP)
	49
	50	#if defined(CONFIG_HPLANCE) \|\| defined(CONFIG_HPLANCE_MODULE)
	51	#include "hplance.h"
	52
	53	#undef WRITERAP
	54	#undef WRITERDP
	55	#undef READRDP
	56
	57	#if defined(CONFIG_MVME147_NET) \|\| defined(CONFIG_MVME147_NET_MODULE)
	58
	59	/* Lossage Factor Nine, Mr Sulu. */
	60	#define WRITERAP(lp,x) (lp->writerap(lp,x))
	61	#define WRITERDP(lp,x) (lp->writerdp(lp,x))
	62	#define READRDP(lp) (lp->readrdp(lp))
	63
	64	#else
	65
	66	/* These inlines can be used if only CONFIG_HPLANCE is defined */
	67	static inline void WRITERAP(struct lance_private *lp, __u16 value)
	68	{
	69	do {
	70	out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
	71	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	72	}
	73
	74	static inline void WRITERDP(struct lance_private *lp, __u16 value)
	75	{
	76	do {
	77	out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
	78	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	79	}
	80
	81	static inline __u16 READRDP(struct lance_private *lp)
	82	{
	83	__u16 value;
	84	do {
	85	value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
	86	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	87	return value;
	88	}
	89
	90	#endif
	91	#endif /* CONFIG_HPLANCE \|\| CONFIG_HPLANCE_MODULE */
	92
	93	/* debugging output macros, various flavours */
	94	/* #define TEST_HITS */
	95	#ifdef UNDEF
96	#define PRINT_RINGS() \
97	do { \
98	int t; \
99	for (t=0; t < RX_RING_SIZE; t++) { \
100	printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n",\
101	t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0,\
102	ib->brx_ring[t].length,\
103	ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits);\
104	}\
105	for (t=0; t < TX_RING_SIZE; t++) { \
106	printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n",\
107	t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0,\
108	ib->btx_ring[t].length,\
109	ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits);\
110	}\
6aa20a22	111	} while (0)
1da177e4 LT	112	#else
1da177e4 LT	113	#define PRINT_RINGS()
6aa20a22	114	#endif
1da177e4 LT	115
	116	/* Load the CSR registers. The LANCE has to be STOPped when we do this! */
	117	static void load_csrs (struct lance_private *lp)
	118	{
	119	volatile struct lance_init_block *aib = lp->lance_init_block;
	120	int leptr;
	121
	122	leptr = LANCE_ADDR (aib);
	123
	124	WRITERAP(lp, LE_CSR1); /* load address of init block */
	125	WRITERDP(lp, leptr & 0xFFFF);
	126	WRITERAP(lp, LE_CSR2);
	127	WRITERDP(lp, leptr >> 16);
	128	WRITERAP(lp, LE_CSR3);
	129	WRITERDP(lp, lp->busmaster_regval); /* set byteswap/ALEctrl/byte ctrl */
	130
	131	/* Point back to csr0 */
	132	WRITERAP(lp, LE_CSR0);
	133	}
	134
	135	/* #define to 0 or 1 appropriately */
	136	#define DEBUG_IRING 0
	137	/* Set up the Lance Rx and Tx rings and the init block */
	138	static void lance_init_ring (struct net_device *dev)
	139	{
	140	struct lance_private *lp = netdev_priv(dev);
	141	volatile struct lance_init_block *ib = lp->init_block;
	142	volatile struct lance_init_block aib; / for LANCE_ADDR computations */
	143	int leptr;
	144	int i;
	145
	146	aib = lp->lance_init_block;
	147
	148	lp->rx_new = lp->tx_new = 0;
	149	lp->rx_old = lp->tx_old = 0;
	150
	151	ib->mode = LE_MO_PROM; /* normal, enable Tx & Rx */
	152
	153	/* Copy the ethernet address to the lance init block
	154	* Notice that we do a byteswap if we're big endian.
	155	* [I think this is the right criterion; at least, sunlance,
	156	* a2065 and atarilance do the byteswap and lance.c (PC) doesn't.
	157	* However, the datasheet says that the BSWAP bit doesn't affect
	158	* the init block, so surely it should be low byte first for
6aa20a22	159	* everybody? Um.]
1da177e4 LT	160	* We could define the ib->physaddr as three 16bit values and
	161	* use (addr[1] << 8) \| addr[0] & co, but this is more efficient.
	162	*/
	163	#ifdef __BIG_ENDIAN
	164	ib->phys_addr [0] = dev->dev_addr [1];
	165	ib->phys_addr [1] = dev->dev_addr [0];
	166	ib->phys_addr [2] = dev->dev_addr [3];
	167	ib->phys_addr [3] = dev->dev_addr [2];
	168	ib->phys_addr [4] = dev->dev_addr [5];
	169	ib->phys_addr [5] = dev->dev_addr [4];
	170	#else
	171	for (i=0; i<6; i++)
	172	ib->phys_addr[i] = dev->dev_addr[i];
6aa20a22	173	#endif
1da177e4 LT	174
	175	if (DEBUG_IRING)
	176	printk ("TX rings:\n");
6aa20a22	177
1da177e4 LT	178	lp->tx_full = 0;
	179	/* Setup the Tx ring entries */
	180	for (i = 0; i < (1<<lp->lance_log_tx_bufs); i++) {
	181	leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
	182	ib->btx_ring [i].tmd0 = leptr;
	183	ib->btx_ring [i].tmd1_hadr = leptr >> 16;
	184	ib->btx_ring [i].tmd1_bits = 0;
	185	ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */
	186	ib->btx_ring [i].misc = 0;
6aa20a22	187	if (DEBUG_IRING)
1da177e4 LT	188	printk ("%d: 0x%8.8x\n", i, leptr);
	189	}
	190
	191	/* Setup the Rx ring entries */
	192	if (DEBUG_IRING)
	193	printk ("RX rings:\n");
	194	for (i = 0; i < (1<<lp->lance_log_rx_bufs); i++) {
	195	leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
	196
	197	ib->brx_ring [i].rmd0 = leptr;
	198	ib->brx_ring [i].rmd1_hadr = leptr >> 16;
	199	ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
	200	/* 0xf000 == bits that must be one (reserved, presumably) */
	201	ib->brx_ring [i].length = -RX_BUFF_SIZE \| 0xf000;
	202	ib->brx_ring [i].mblength = 0;
	203	if (DEBUG_IRING)
	204	printk ("%d: 0x%8.8x\n", i, leptr);
	205	}
	206
	207	/* Setup the initialization block */
6aa20a22	208
1da177e4 LT	209	/* Setup rx descriptor pointer */
	210	leptr = LANCE_ADDR(&aib->brx_ring);
	211	ib->rx_len = (lp->lance_log_rx_bufs << 13) \| (leptr >> 16);
	212	ib->rx_ptr = leptr;
	213	if (DEBUG_IRING)
	214	printk ("RX ptr: %8.8x\n", leptr);
6aa20a22	215
1da177e4 LT	216	/* Setup tx descriptor pointer */
	217	leptr = LANCE_ADDR(&aib->btx_ring);
	218	ib->tx_len = (lp->lance_log_tx_bufs << 13) \| (leptr >> 16);
	219	ib->tx_ptr = leptr;
	220	if (DEBUG_IRING)
	221	printk ("TX ptr: %8.8x\n", leptr);
	222
	223	/* Clear the multicast filter */
	224	ib->filter [0] = 0;
	225	ib->filter [1] = 0;
	226	PRINT_RINGS();
	227	}
	228
	229	/* LANCE must be STOPped before we do this, too... */
	230	static int init_restart_lance (struct lance_private *lp)
	231	{
	232	int i;
	233
	234	WRITERAP(lp, LE_CSR0);
	235	WRITERDP(lp, LE_C0_INIT);
	236
	237	/* Need a hook here for sunlance ledma stuff */
	238
	239	/* Wait for the lance to complete initialization */
	240	for (i = 0; (i < 100) && !(READRDP(lp) & (LE_C0_ERR \| LE_C0_IDON)); i++)
	241	barrier();
	242	if ((i == 100) \|\| (READRDP(lp) & LE_C0_ERR)) {
	243	printk ("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, READRDP(lp));
	244	return -1;
	245	}
	246
	247	/* Clear IDON by writing a "1", enable interrupts and start lance */
	248	WRITERDP(lp, LE_C0_IDON);
	249	WRITERDP(lp, LE_C0_INEA \| LE_C0_STRT);
	250
	251	return 0;
	252	}
	253
	254	static int lance_reset (struct net_device *dev)
	255	{
	256	struct lance_private *lp = netdev_priv(dev);
	257	int status;
6aa20a22	258
1da177e4 LT	259	/* Stop the lance */
	260	WRITERAP(lp, LE_CSR0);
	261	WRITERDP(lp, LE_C0_STOP);
	262
	263	load_csrs (lp);
	264	lance_init_ring (dev);
1ae5dc34	265	dev->trans_start = jiffies; /* prevent tx timeout */
1da177e4 LT	266	status = init_restart_lance (lp);
	267	#ifdef DEBUG_DRIVER
	268	printk ("Lance restart=%d\n", status);
	269	#endif
	270	return status;
	271	}
	272
	273	static int lance_rx (struct net_device *dev)
	274	{
	275	struct lance_private *lp = netdev_priv(dev);
	276	volatile struct lance_init_block *ib = lp->init_block;
	277	volatile struct lance_rx_desc *rd;
	278	unsigned char bits;
1da177e4 LT	279	#ifdef TEST_HITS
	280	int i;
	281	#endif
	282
	283	#ifdef TEST_HITS
	284	printk ("[");
	285	for (i = 0; i < RX_RING_SIZE; i++) {
	286	if (i == lp->rx_new)
	287	printk ("%s",
	288	ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "_" : "X");
	289	else
	290	printk ("%s",
	291	ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "." : "1");
	292	}
	293	printk ("]");
	294	#endif
	295	#ifdef CONFIG_HP300
	296	blinken_leds(0x40, 0);
6aa20a22	297	#endif
1da177e4 LT	298	WRITERDP(lp, LE_C0_RINT \| LE_C0_INEA); /* ack Rx int, reenable ints */
	299	for (rd = &ib->brx_ring [lp->rx_new]; /* For each Rx ring we own... */
	300	!((bits = rd->rmd1_bits) & LE_R1_OWN);
	301	rd = &ib->brx_ring [lp->rx_new]) {
	302
	303	/* We got an incomplete frame? */
	304	if ((bits & LE_R1_POK) != LE_R1_POK) {
09f75cd7 JG	305	dev->stats.rx_over_errors++;
09f75cd7 JG	306	dev->stats.rx_errors++;
1da177e4 LT	307	continue;
	308	} else if (bits & LE_R1_ERR) {
	309	/* Count only the end frame as a rx error,
	310	* not the beginning
	311	*/
09f75cd7 JG	312	if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
	313	if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
	314	if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
	315	if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
	316	if (bits & LE_R1_EOP) dev->stats.rx_errors++;
1da177e4	317	} else {
79ea13ce AV	318	int len = (rd->mblength & 0xfff) - 4;
79ea13ce AV	319	struct sk_buff *skb = dev_alloc_skb (len+2);
1da177e4	320
79ea13ce	321	if (!skb) {
1da177e4 LT	322	printk ("%s: Memory squeeze, deferring packet.\n",
1da177e4 LT	323	dev->name);
09f75cd7	324	dev->stats.rx_dropped++;
1da177e4 LT	325	rd->mblength = 0;
	326	rd->rmd1_bits = LE_R1_OWN;
	327	lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
	328	return 0;
	329	}
6aa20a22	330
1da177e4 LT	331	skb_reserve (skb, 2); /* 16 byte align */
1da177e4 LT	332	skb_put (skb, len); /* make room */
8c7b7faa	333	skb_copy_to_linear_data(skb,
1da177e4	334	(unsigned char *)&(ib->rx_buf [lp->rx_new][0]),
8c7b7faa	335	len);
1da177e4 LT	336	skb->protocol = eth_type_trans (skb, dev);
1da177e4 LT	337	netif_rx (skb);
09f75cd7 JG	338	dev->stats.rx_packets++;
09f75cd7 JG	339	dev->stats.rx_bytes += len;
1da177e4 LT	340	}
	341
	342	/* Return the packet to the pool */
	343	rd->mblength = 0;
	344	rd->rmd1_bits = LE_R1_OWN;
	345	lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
	346	}
	347	return 0;
	348	}
	349
	350	static int lance_tx (struct net_device *dev)
	351	{
	352	struct lance_private *lp = netdev_priv(dev);
	353	volatile struct lance_init_block *ib = lp->init_block;
	354	volatile struct lance_tx_desc *td;
	355	int i, j;
	356	int status;
	357
	358	#ifdef CONFIG_HP300
	359	blinken_leds(0x80, 0);
	360	#endif
	361	/* csr0 is 2f3 */
	362	WRITERDP(lp, LE_C0_TINT \| LE_C0_INEA);
	363	/* csr0 is 73 */
	364
	365	j = lp->tx_old;
	366	for (i = j; i != lp->tx_new; i = j) {
	367	td = &ib->btx_ring [i];
	368
	369	/* If we hit a packet not owned by us, stop */
	370	if (td->tmd1_bits & LE_T1_OWN)
	371	break;
6aa20a22	372
1da177e4 LT	373	if (td->tmd1_bits & LE_T1_ERR) {
1da177e4 LT	374	status = td->misc;
6aa20a22	375
09f75cd7 JG	376	dev->stats.tx_errors++;
	377	if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
	378	if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
1da177e4 LT	379
1da177e4 LT	380	if (status & LE_T3_CLOS) {
09f75cd7	381	dev->stats.tx_carrier_errors++;
1da177e4 LT	382	if (lp->auto_select) {
	383	lp->tpe = 1 - lp->tpe;
	384	printk("%s: Carrier Lost, trying %s\n",
	385	dev->name, lp->tpe?"TPE":"AUI");
	386	/* Stop the lance */
	387	WRITERAP(lp, LE_CSR0);
	388	WRITERDP(lp, LE_C0_STOP);
	389	lance_init_ring (dev);
	390	load_csrs (lp);
	391	init_restart_lance (lp);
	392	return 0;
	393	}
	394	}
	395
	396	/* buffer errors and underflows turn off the transmitter */
	397	/* Restart the adapter */
	398	if (status & (LE_T3_BUF\|LE_T3_UFL)) {
09f75cd7	399	dev->stats.tx_fifo_errors++;
1da177e4 LT	400
	401	printk ("%s: Tx: ERR_BUF\|ERR_UFL, restarting\n",
	402	dev->name);
	403	/* Stop the lance */
	404	WRITERAP(lp, LE_CSR0);
	405	WRITERDP(lp, LE_C0_STOP);
	406	lance_init_ring (dev);
	407	load_csrs (lp);
	408	init_restart_lance (lp);
	409	return 0;
	410	}
	411	} else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
	412	/*
	413	* So we don't count the packet more than once.
	414	*/
	415	td->tmd1_bits &= ~(LE_T1_POK);
	416
	417	/* One collision before packet was sent. */
	418	if (td->tmd1_bits & LE_T1_EONE)
09f75cd7	419	dev->stats.collisions++;
1da177e4 LT	420
	421	/* More than one collision, be optimistic. */
	422	if (td->tmd1_bits & LE_T1_EMORE)
09f75cd7	423	dev->stats.collisions += 2;
1da177e4	424
09f75cd7	425	dev->stats.tx_packets++;
1da177e4	426	}
6aa20a22	427
1da177e4 LT	428	j = (j + 1) & lp->tx_ring_mod_mask;
	429	}
	430	lp->tx_old = j;
	431	WRITERDP(lp, LE_C0_TINT \| LE_C0_INEA);
	432	return 0;
	433	}
	434
	435	static irqreturn_t
7d12e780	436	lance_interrupt (int irq, void *dev_id)
1da177e4 LT	437	{
	438	struct net_device dev = (struct net_device )dev_id;
	439	struct lance_private *lp = netdev_priv(dev);
	440	int csr0;
	441
	442	spin_lock (&lp->devlock);
	443
	444	WRITERAP(lp, LE_CSR0); /* LANCE Controller Status */
	445	csr0 = READRDP(lp);
	446
	447	PRINT_RINGS();
6aa20a22	448
1da177e4 LT	449	if (!(csr0 & LE_C0_INTR)) { /* Check if any interrupt has */
	450	spin_unlock (&lp->devlock);
	451	return IRQ_NONE; /* been generated by the Lance. */
	452	}
	453
	454	/* Acknowledge all the interrupt sources ASAP */
	455	WRITERDP(lp, csr0 & ~(LE_C0_INEA\|LE_C0_TDMD\|LE_C0_STOP\|LE_C0_STRT\|LE_C0_INIT));
	456
	457	if ((csr0 & LE_C0_ERR)) {
	458	/* Clear the error condition */
	459	WRITERDP(lp, LE_C0_BABL\|LE_C0_ERR\|LE_C0_MISS\|LE_C0_INEA);
	460	}
	461
	462	if (csr0 & LE_C0_RINT)
	463	lance_rx (dev);
	464
	465	if (csr0 & LE_C0_TINT)
	466	lance_tx (dev);
	467
	468	/* Log misc errors. */
	469	if (csr0 & LE_C0_BABL)
09f75cd7	470	dev->stats.tx_errors++; /* Tx babble. */
1da177e4	471	if (csr0 & LE_C0_MISS)
09f75cd7	472	dev->stats.rx_errors++; /* Missed a Rx frame. */
1da177e4	473	if (csr0 & LE_C0_MERR) {
6aa20a22	474	printk("%s: Bus master arbitration failure, status %4.4x.\n",
1da177e4 LT	475	dev->name, csr0);
	476	/* Restart the chip. */
	477	WRITERDP(lp, LE_C0_STRT);
	478	}
	479
	480	if (lp->tx_full && netif_queue_stopped(dev) && (TX_BUFFS_AVAIL >= 0)) {
	481	lp->tx_full = 0;
	482	netif_wake_queue (dev);
	483	}
6aa20a22	484
1da177e4 LT	485	WRITERAP(lp, LE_CSR0);
	486	WRITERDP(lp, LE_C0_BABL\|LE_C0_CERR\|LE_C0_MISS\|LE_C0_MERR\|LE_C0_IDON\|LE_C0_INEA);
	487
	488	spin_unlock (&lp->devlock);
	489	return IRQ_HANDLED;
	490	}
	491
	492	int lance_open (struct net_device *dev)
	493	{
	494	struct lance_private *lp = netdev_priv(dev);
	495	int res;
6aa20a22	496
1da177e4	497	/* Install the Interrupt handler. Or we could shunt this out to specific drivers? */
38515e90	498	if (request_irq(lp->irq, lance_interrupt, IRQF_SHARED, lp->name, dev))
1da177e4 LT	499	return -EAGAIN;
	500
	501	res = lance_reset(dev);
	502	spin_lock_init(&lp->devlock);
	503	netif_start_queue (dev);
	504
	505	return res;
	506	}
bf4d5934	507	EXPORT_SYMBOL_GPL(lance_open);
1da177e4 LT	508
	509	int lance_close (struct net_device *dev)
	510	{
	511	struct lance_private *lp = netdev_priv(dev);
6aa20a22	512
1da177e4 LT	513	netif_stop_queue (dev);
	514
	515	/* Stop the LANCE */
	516	WRITERAP(lp, LE_CSR0);
	517	WRITERDP(lp, LE_C0_STOP);
	518
	519	free_irq(lp->irq, dev);
	520
	521	return 0;
	522	}
bf4d5934	523	EXPORT_SYMBOL_GPL(lance_close);
1da177e4 LT	524
	525	void lance_tx_timeout(struct net_device *dev)
	526	{
	527	printk("lance_tx_timeout\n");
	528	lance_reset(dev);
1ae5dc34	529	dev->trans_start = jiffies; /* prevent tx timeout */
1da177e4 LT	530	netif_wake_queue (dev);
1da177e4 LT	531	}
bf4d5934	532	EXPORT_SYMBOL_GPL(lance_tx_timeout);
1da177e4 LT	533
	534	int lance_start_xmit (struct sk_buff skb, struct net_device dev)
	535	{
	536	struct lance_private *lp = netdev_priv(dev);
	537	volatile struct lance_init_block *ib = lp->init_block;
	538	int entry, skblen, len;
	539	static int outs;
	540	unsigned long flags;
	541
	542	if (!TX_BUFFS_AVAIL)
5b548140	543	return NETDEV_TX_LOCKED;
1da177e4 LT	544
	545	netif_stop_queue (dev);
	546
	547	skblen = skb->len;
	548
	549	#ifdef DEBUG_DRIVER
	550	/* dump the packet */
	551	{
	552	int i;
6aa20a22	553
1da177e4 LT	554	for (i = 0; i < 64; i++) {
	555	if ((i % 16) == 0)
	556	printk ("\n");
	557	printk ("%2.2x ", skb->data [i]);
	558	}
	559	}
	560	#endif
	561	len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
	562	entry = lp->tx_new & lp->tx_ring_mod_mask;
	563	ib->btx_ring [entry].length = (-len) \| 0xf000;
	564	ib->btx_ring [entry].misc = 0;
6aa20a22	565
cfa08bb5 GU	566	if (skb->len < ETH_ZLEN)
	567	memset((void *)&ib->tx_buf[entry][0], 0, ETH_ZLEN);
	568	skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen);
6aa20a22	569
1da177e4 LT	570	/* Now, give the packet to the lance */
	571	ib->btx_ring [entry].tmd1_bits = (LE_T1_POK\|LE_T1_OWN);
	572	lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;
	573
	574	outs++;
	575	/* Kick the lance: transmit now */
	576	WRITERDP(lp, LE_C0_INEA \| LE_C0_TDMD);
1da177e4	577	dev_kfree_skb (skb);
6aa20a22	578
1da177e4 LT	579	spin_lock_irqsave (&lp->devlock, flags);
	580	if (TX_BUFFS_AVAIL)
	581	netif_start_queue (dev);
	582	else
	583	lp->tx_full = 1;
	584	spin_unlock_irqrestore (&lp->devlock, flags);
	585
ec634fe3	586	return NETDEV_TX_OK;
1da177e4	587	}
bf4d5934	588	EXPORT_SYMBOL_GPL(lance_start_xmit);
1da177e4	589
1da177e4 LT	590	/* taken from the depca driver via a2065.c */
	591	static void lance_load_multicast (struct net_device *dev)
	592	{
	593	struct lance_private *lp = netdev_priv(dev);
	594	volatile struct lance_init_block *ib = lp->init_block;
	595	volatile u16 mcast_table = (u16 )&ib->filter;
22bedad3	596	struct netdev_hw_addr *ha;
1da177e4	597	char *addrs;
1da177e4	598	u32 crc;
6aa20a22	599
1da177e4	600	/* set all multicast bits */
6aa20a22	601	if (dev->flags & IFF_ALLMULTI){
1da177e4 LT	602	ib->filter [0] = 0xffffffff;
	603	ib->filter [1] = 0xffffffff;
	604	return;
	605	}
	606	/* clear the multicast filter */
	607	ib->filter [0] = 0;
	608	ib->filter [1] = 0;
	609
	610	/* Add addresses */
22bedad3 JP	611	netdev_for_each_mc_addr(ha, dev) {
22bedad3 JP	612	addrs = ha->addr;
1da177e4 LT	613
	614	/* multicast address? */
	615	if (!(*addrs & 1))
	616	continue;
6aa20a22	617
1da177e4 LT	618	crc = ether_crc_le(6, addrs);
	619	crc = crc >> 26;
	620	mcast_table [crc >> 4] \|= 1 << (crc & 0xf);
	621	}
1da177e4 LT	622	}
	623
	624
	625	void lance_set_multicast (struct net_device *dev)
	626	{
	627	struct lance_private *lp = netdev_priv(dev);
	628	volatile struct lance_init_block *ib = lp->init_block;
	629	int stopped;
	630
	631	stopped = netif_queue_stopped(dev);
	632	if (!stopped)
	633	netif_stop_queue (dev);
	634
	635	while (lp->tx_old != lp->tx_new)
	636	schedule();
	637
	638	WRITERAP(lp, LE_CSR0);
	639	WRITERDP(lp, LE_C0_STOP);
	640	lance_init_ring (dev);
	641
	642	if (dev->flags & IFF_PROMISC) {
	643	ib->mode \|= LE_MO_PROM;
	644	} else {
	645	ib->mode &= ~LE_MO_PROM;
	646	lance_load_multicast (dev);
	647	}
	648	load_csrs (lp);
	649	init_restart_lance (lp);
	650
	651	if (!stopped)
	652	netif_start_queue (dev);
	653	}
bf4d5934	654	EXPORT_SYMBOL_GPL(lance_set_multicast);
1da177e4 LT	655
	656	#ifdef CONFIG_NET_POLL_CONTROLLER
	657	void lance_poll(struct net_device *dev)
	658	{
	659	struct lance_private *lp = netdev_priv(dev);
	660
	661	spin_lock (&lp->devlock);
	662	WRITERAP(lp, LE_CSR0);
	663	WRITERDP(lp, LE_C0_STRT);
	664	spin_unlock (&lp->devlock);
2850bc27	665	lance_interrupt(dev->irq, dev);
1da177e4 LT	666	}
	667	#endif
	668
	669	MODULE_LICENSE("GPL");