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Diffstat (limited to 'linux/src/drivers/net/8390.c')
| -rw-r--r-- | linux/src/drivers/net/8390.c | 832 |
1 files changed, 832 insertions, 0 deletions
diff --git a/linux/src/drivers/net/8390.c b/linux/src/drivers/net/8390.c new file mode 100644 index 00000000..9864106b --- /dev/null +++ b/linux/src/drivers/net/8390.c @@ -0,0 +1,832 @@ +/* 8390.c: A general NS8390 ethernet driver core for linux. */ +/* + Written 1992-94 by Donald Becker. + + Copyright 1993 United States Government as represented by the + Director, National Security Agency. + + This software may be used and distributed according to the terms + of the GNU Public License, incorporated herein by reference. + + The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O + Center of Excellence in Space Data and Information Sciences + Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771 + + This is the chip-specific code for many 8390-based ethernet adaptors. + This is not a complete driver, it must be combined with board-specific + code such as ne.c, wd.c, 3c503.c, etc. + + Seeing how at least eight drivers use this code, (not counting the + PCMCIA ones either) it is easy to break some card by what seems like + a simple innocent change. Please contact me or Donald if you think + you have found something that needs changing. -- PG + + + Changelog: + + Paul Gortmaker : remove set_bit lock, other cleanups. + Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to + ei_block_input() for eth_io_copy_and_sum(). + Paul Gortmaker : exchange static int ei_pingpong for a #define, + also add better Tx error handling. + Paul Gortmaker : rewrite Rx overrun handling as per NS specs. + + + Sources: + The National Semiconductor LAN Databook, and the 3Com 3c503 databook. + + */ + +static const char *version = + "8390.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/fs.h> +#include <linux/types.h> +#include <linux/ptrace.h> +#include <linux/string.h> +#include <asm/system.h> +#include <asm/segment.h> +#include <asm/bitops.h> +#include <asm/io.h> +#include <linux/errno.h> +#include <linux/fcntl.h> +#include <linux/in.h> +#include <linux/interrupt.h> + +#include <linux/netdevice.h> +#include <linux/etherdevice.h> + +#include "8390.h" + +/* These are the operational function interfaces to board-specific + routines. + void reset_8390(struct device *dev) + Resets the board associated with DEV, including a hardware reset of + the 8390. This is only called when there is a transmit timeout, and + it is always followed by 8390_init(). + void block_output(struct device *dev, int count, const unsigned char *buf, + int start_page) + Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The + "page" value uses the 8390's 256-byte pages. + void get_8390_hdr(struct device *dev, struct e8390_hdr *hdr, int ring_page) + Read the 4 byte, page aligned 8390 header. *If* there is a + subsequent read, it will be of the rest of the packet. + void block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset) + Read COUNT bytes from the packet buffer into the skb data area. Start + reading from RING_OFFSET, the address as the 8390 sees it. This will always + follow the read of the 8390 header. +*/ +#define ei_reset_8390 (ei_local->reset_8390) +#define ei_block_output (ei_local->block_output) +#define ei_block_input (ei_local->block_input) +#define ei_get_8390_hdr (ei_local->get_8390_hdr) + +/* use 0 for production, 1 for verification, >2 for debug */ +#ifdef EI_DEBUG +int ei_debug = EI_DEBUG; +#else +int ei_debug = 1; +#endif + +/* Index to functions. */ +static void ei_tx_intr(struct device *dev); +static void ei_tx_err(struct device *dev); +static void ei_receive(struct device *dev); +static void ei_rx_overrun(struct device *dev); + +/* Routines generic to NS8390-based boards. */ +static void NS8390_trigger_send(struct device *dev, unsigned int length, + int start_page); +static void set_multicast_list(struct device *dev); + + +/* Open/initialize the board. This routine goes all-out, setting everything + up anew at each open, even though many of these registers should only + need to be set once at boot. + */ +int ei_open(struct device *dev) +{ + struct ei_device *ei_local = (struct ei_device *) dev->priv; + + /* This can't happen unless somebody forgot to call ethdev_init(). */ + if (ei_local == NULL) { + printk(KERN_EMERG "%s: ei_open passed a non-existent device!\n", dev->name); + return -ENXIO; + } + + irq2dev_map[dev->irq] = dev; + NS8390_init(dev, 1); + dev->start = 1; + ei_local->irqlock = 0; + return 0; +} + +/* Opposite of above. Only used when "ifconfig <devname> down" is done. */ +int ei_close(struct device *dev) +{ + NS8390_init(dev, 0); + dev->start = 0; + return 0; +} + +static int ei_start_xmit(struct sk_buff *skb, struct device *dev) +{ + int e8390_base = dev->base_addr; + struct ei_device *ei_local = (struct ei_device *) dev->priv; + int length, send_length, output_page; + +/* + * We normally shouldn't be called if dev->tbusy is set, but the + * existing code does anyway. If it has been too long since the + * last Tx, we assume the board has died and kick it. + */ + + if (dev->tbusy) { /* Do timeouts, just like the 8003 driver. */ + int txsr = inb(e8390_base+EN0_TSR), isr; + int tickssofar = jiffies - dev->trans_start; + if (tickssofar < TX_TIMEOUT || (tickssofar < (TX_TIMEOUT+5) && ! (txsr & ENTSR_PTX))) { + return 1; + } + isr = inb(e8390_base+EN0_ISR); + if (dev->start == 0) { + printk("%s: xmit on stopped card\n", dev->name); + return 1; + } + + /* + * Note that if the Tx posted a TX_ERR interrupt, then the + * error will have been handled from the interrupt handler. + * and not here. + */ + + printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n", + dev->name, (txsr & ENTSR_ABT) ? "excess collisions." : + (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar); + + if (!isr && !ei_local->stat.tx_packets) { + /* The 8390 probably hasn't gotten on the cable yet. */ + ei_local->interface_num ^= 1; /* Try a different xcvr. */ + } + + /* Try to restart the card. Perhaps the user has fixed something. */ + ei_reset_8390(dev); + NS8390_init(dev, 1); + dev->trans_start = jiffies; + } + + /* Sending a NULL skb means some higher layer thinks we've missed an + tx-done interrupt. Caution: dev_tint() handles the cli()/sti() + itself. */ + if (skb == NULL) { + dev_tint(dev); + return 0; + } + + length = skb->len; + if (skb->len <= 0) + return 0; + + /* Mask interrupts from the ethercard. */ + outb_p(0x00, e8390_base + EN0_IMR); + if (dev->interrupt) { + printk("%s: Tx request while isr active.\n",dev->name); + outb_p(ENISR_ALL, e8390_base + EN0_IMR); + return 1; + } + ei_local->irqlock = 1; + + send_length = ETH_ZLEN < length ? length : ETH_ZLEN; + +#ifdef EI_PINGPONG + + /* + * We have two Tx slots available for use. Find the first free + * slot, and then perform some sanity checks. With two Tx bufs, + * you get very close to transmitting back-to-back packets. With + * only one Tx buf, the transmitter sits idle while you reload the + * card, leaving a substantial gap between each transmitted packet. + */ + + if (ei_local->tx1 == 0) { + output_page = ei_local->tx_start_page; + ei_local->tx1 = send_length; + if (ei_debug && ei_local->tx2 > 0) + printk("%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n", + dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing); + } else if (ei_local->tx2 == 0) { + output_page = ei_local->tx_start_page + TX_1X_PAGES; + ei_local->tx2 = send_length; + if (ei_debug && ei_local->tx1 > 0) + printk("%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n", + dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing); + } else { /* We should never get here. */ + if (ei_debug) + printk("%s: No Tx buffers free! irq=%d tx1=%d tx2=%d last=%d\n", + dev->name, dev->interrupt, ei_local->tx1, ei_local->tx2, ei_local->lasttx); + ei_local->irqlock = 0; + dev->tbusy = 1; + outb_p(ENISR_ALL, e8390_base + EN0_IMR); + return 1; + } + + /* + * Okay, now upload the packet and trigger a send if the transmitter + * isn't already sending. If it is busy, the interrupt handler will + * trigger the send later, upon receiving a Tx done interrupt. + */ + + ei_block_output(dev, length, skb->data, output_page); + if (! ei_local->txing) { + ei_local->txing = 1; + NS8390_trigger_send(dev, send_length, output_page); + dev->trans_start = jiffies; + if (output_page == ei_local->tx_start_page) { + ei_local->tx1 = -1; + ei_local->lasttx = -1; + } else { + ei_local->tx2 = -1; + ei_local->lasttx = -2; + } + } else + ei_local->txqueue++; + + dev->tbusy = (ei_local->tx1 && ei_local->tx2); + +#else /* EI_PINGPONG */ + + /* + * Only one Tx buffer in use. You need two Tx bufs to come close to + * back-to-back transmits. Expect a 20 -> 25% performance hit on + * reasonable hardware if you only use one Tx buffer. + */ + + ei_block_output(dev, length, skb->data, ei_local->tx_start_page); + ei_local->txing = 1; + NS8390_trigger_send(dev, send_length, ei_local->tx_start_page); + dev->trans_start = jiffies; + dev->tbusy = 1; + +#endif /* EI_PINGPONG */ + + /* Turn 8390 interrupts back on. */ + ei_local->irqlock = 0; + outb_p(ENISR_ALL, e8390_base + EN0_IMR); + + dev_kfree_skb (skb, FREE_WRITE); + + return 0; +} + +/* The typical workload of the driver: + Handle the ether interface interrupts. */ +void ei_interrupt(int irq, void *dev_id, struct pt_regs * regs) +{ + struct device *dev = (struct device *)(irq2dev_map[irq]); + int e8390_base; + int interrupts, nr_serviced = 0; + struct ei_device *ei_local; + + if (dev == NULL) { + printk ("net_interrupt(): irq %d for unknown device.\n", irq); + return; + } + e8390_base = dev->base_addr; + ei_local = (struct ei_device *) dev->priv; + if (dev->interrupt || ei_local->irqlock) { + /* The "irqlock" check is only for testing. */ + printk(ei_local->irqlock + ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n" + : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n", + dev->name, inb_p(e8390_base + EN0_ISR), + inb_p(e8390_base + EN0_IMR)); + return; + } + + dev->interrupt = 1; + + /* Change to page 0 and read the intr status reg. */ + outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD); + if (ei_debug > 3) + printk("%s: interrupt(isr=%#2.2x).\n", dev->name, + inb_p(e8390_base + EN0_ISR)); + + /* !!Assumption!! -- we stay in page 0. Don't break this. */ + while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 + && ++nr_serviced < MAX_SERVICE) { + if (dev->start == 0) { + printk("%s: interrupt from stopped card\n", dev->name); + interrupts = 0; + break; + } + if (interrupts & ENISR_OVER) { + ei_rx_overrun(dev); + } else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) { + /* Got a good (?) packet. */ + ei_receive(dev); + } + /* Push the next to-transmit packet through. */ + if (interrupts & ENISR_TX) { + ei_tx_intr(dev); + } else if (interrupts & ENISR_TX_ERR) { + ei_tx_err(dev); + } + + if (interrupts & ENISR_COUNTERS) { + ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0); + ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1); + ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2); + outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */ + } + + /* Ignore any RDC interrupts that make it back to here. */ + if (interrupts & ENISR_RDC) { + outb_p(ENISR_RDC, e8390_base + EN0_ISR); + } + + outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD); + } + + if (interrupts && ei_debug) { + outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD); + if (nr_serviced >= MAX_SERVICE) { + printk("%s: Too much work at interrupt, status %#2.2x\n", + dev->name, interrupts); + outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */ + } else { + printk("%s: unknown interrupt %#2x\n", dev->name, interrupts); + outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */ + } + } + dev->interrupt = 0; + return; +} + +/* + * A transmitter error has happened. Most likely excess collisions (which + * is a fairly normal condition). If the error is one where the Tx will + * have been aborted, we try and send another one right away, instead of + * letting the failed packet sit and collect dust in the Tx buffer. This + * is a much better solution as it avoids kernel based Tx timeouts, and + * an unnecessary card reset. + */ + +static void ei_tx_err(struct device *dev) +{ + int e8390_base = dev->base_addr; + unsigned char txsr = inb_p(e8390_base+EN0_TSR); + unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU); + struct ei_device *ei_local = (struct ei_device *) dev->priv; + +#ifdef VERBOSE_ERROR_DUMP + printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr); + if (txsr & ENTSR_ABT) + printk("excess-collisions "); + if (txsr & ENTSR_ND) + printk("non-deferral "); + if (txsr & ENTSR_CRS) + printk("lost-carrier "); + if (txsr & ENTSR_FU) + printk("FIFO-underrun "); + if (txsr & ENTSR_CDH) + printk("lost-heartbeat "); + printk("\n"); +#endif + + outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */ + + if (tx_was_aborted) + ei_tx_intr(dev); + + /* + * Note: NCR reads zero on 16 collisions so we add them + * in by hand. Somebody might care... + */ + if (txsr & ENTSR_ABT) + ei_local->stat.collisions += 16; + +} + +/* We have finished a transmit: check for errors and then trigger the next + packet to be sent. */ +static void ei_tx_intr(struct device *dev) +{ + int e8390_base = dev->base_addr; + int status = inb(e8390_base + EN0_TSR); + struct ei_device *ei_local = (struct ei_device *) dev->priv; + + outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */ + +#ifdef EI_PINGPONG + + /* + * There are two Tx buffers, see which one finished, and trigger + * the send of another one if it exists. + */ + ei_local->txqueue--; + if (ei_local->tx1 < 0) { + if (ei_local->lasttx != 1 && ei_local->lasttx != -1) + printk("%s: bogus last_tx_buffer %d, tx1=%d.\n", + ei_local->name, ei_local->lasttx, ei_local->tx1); + ei_local->tx1 = 0; + dev->tbusy = 0; + if (ei_local->tx2 > 0) { + ei_local->txing = 1; + NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6); + dev->trans_start = jiffies; + ei_local->tx2 = -1, + ei_local->lasttx = 2; + } else + ei_local->lasttx = 20, ei_local->txing = 0; + } else if (ei_local->tx2 < 0) { + if (ei_local->lasttx != 2 && ei_local->lasttx != -2) + printk("%s: bogus last_tx_buffer %d, tx2=%d.\n", + ei_local->name, ei_local->lasttx, ei_local->tx2); + ei_local->tx2 = 0; + dev->tbusy = 0; + if (ei_local->tx1 > 0) { + ei_local->txing = 1; + NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page); + dev->trans_start = jiffies; + ei_local->tx1 = -1; + ei_local->lasttx = 1; + } else + ei_local->lasttx = 10, ei_local->txing = 0; + } else + printk("%s: unexpected TX-done interrupt, lasttx=%d.\n", + dev->name, ei_local->lasttx); + +#else /* EI_PINGPONG */ + /* + * Single Tx buffer: mark it free so another packet can be loaded. + */ + ei_local->txing = 0; + dev->tbusy = 0; +#endif + + /* Minimize Tx latency: update the statistics after we restart TXing. */ + if (status & ENTSR_COL) + ei_local->stat.collisions++; + if (status & ENTSR_PTX) + ei_local->stat.tx_packets++; + else { + ei_local->stat.tx_errors++; + if (status & ENTSR_ABT) ei_local->stat.tx_aborted_errors++; + if (status & ENTSR_CRS) ei_local->stat.tx_carrier_errors++; + if (status & ENTSR_FU) ei_local->stat.tx_fifo_errors++; + if (status & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++; + if (status & ENTSR_OWC) ei_local->stat.tx_window_errors++; + } + + mark_bh (NET_BH); +} + +/* We have a good packet(s), get it/them out of the buffers. */ + +static void ei_receive(struct device *dev) +{ + int e8390_base = dev->base_addr; + struct ei_device *ei_local = (struct ei_device *) dev->priv; + unsigned char rxing_page, this_frame, next_frame; + unsigned short current_offset; + int rx_pkt_count = 0; + struct e8390_pkt_hdr rx_frame; + int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page; + + while (++rx_pkt_count < 10) { + int pkt_len; + + /* Get the rx page (incoming packet pointer). */ + outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD); + rxing_page = inb_p(e8390_base + EN1_CURPAG); + outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD); + + /* Remove one frame from the ring. Boundary is always a page behind. */ + this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1; + if (this_frame >= ei_local->stop_page) + this_frame = ei_local->rx_start_page; + + /* Someday we'll omit the previous, iff we never get this message. + (There is at least one clone claimed to have a problem.) */ + if (ei_debug > 0 && this_frame != ei_local->current_page) + printk("%s: mismatched read page pointers %2x vs %2x.\n", + dev->name, this_frame, ei_local->current_page); + + if (this_frame == rxing_page) /* Read all the frames? */ + break; /* Done for now */ + + current_offset = this_frame << 8; + ei_get_8390_hdr(dev, &rx_frame, this_frame); + + pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr); + + next_frame = this_frame + 1 + ((pkt_len+4)>>8); + + /* Check for bogosity warned by 3c503 book: the status byte is never + written. This happened a lot during testing! This code should be + cleaned up someday. */ + if (rx_frame.next != next_frame + && rx_frame.next != next_frame + 1 + && rx_frame.next != next_frame - num_rx_pages + && rx_frame.next != next_frame + 1 - num_rx_pages) { + ei_local->current_page = rxing_page; + outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY); + ei_local->stat.rx_errors++; + continue; + } + + if (pkt_len < 60 || pkt_len > 1518) { + if (ei_debug) + printk("%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n", + dev->name, rx_frame.count, rx_frame.status, + rx_frame.next); + ei_local->stat.rx_errors++; + } else if ((rx_frame.status & 0x0F) == ENRSR_RXOK) { + struct sk_buff *skb; + + skb = dev_alloc_skb(pkt_len+2); + if (skb == NULL) { + if (ei_debug > 1) + printk("%s: Couldn't allocate a sk_buff of size %d.\n", + dev->name, pkt_len); + ei_local->stat.rx_dropped++; + break; + } else { + skb_reserve(skb,2); /* IP headers on 16 byte boundaries */ + skb->dev = dev; + skb_put(skb, pkt_len); /* Make room */ + ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame)); + skb->protocol=eth_type_trans(skb,dev); + netif_rx(skb); + ei_local->stat.rx_packets++; + } + } else { + int errs = rx_frame.status; + if (ei_debug) + printk("%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n", + dev->name, rx_frame.status, rx_frame.next, + rx_frame.count); + if (errs & ENRSR_FO) + ei_local->stat.rx_fifo_errors++; + } + next_frame = rx_frame.next; + + /* This _should_ never happen: it's here for avoiding bad clones. */ + if (next_frame >= ei_local->stop_page) { + printk("%s: next frame inconsistency, %#2x\n", dev->name, + next_frame); + next_frame = ei_local->rx_start_page; + } + ei_local->current_page = next_frame; + outb_p(next_frame-1, e8390_base+EN0_BOUNDARY); + } + + /* We used to also ack ENISR_OVER here, but that would sometimes mask + a real overrun, leaving the 8390 in a stopped state with rec'vr off. */ + outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR); + return; +} + +/* + * We have a receiver overrun: we have to kick the 8390 to get it started + * again. Problem is that you have to kick it exactly as NS prescribes in + * the updated datasheets, or "the NIC may act in an unpredictable manner." + * This includes causing "the NIC to defer indefinitely when it is stopped + * on a busy network." Ugh. + */ +static void ei_rx_overrun(struct device *dev) +{ + int e8390_base = dev->base_addr; + unsigned long wait_start_time; + unsigned char was_txing, must_resend = 0; + struct ei_device *ei_local = (struct ei_device *) dev->priv; + + /* + * Record whether a Tx was in progress and then issue the + * stop command. + */ + was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS; + outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); + + if (ei_debug > 1) + printk("%s: Receiver overrun.\n", dev->name); + ei_local->stat.rx_over_errors++; + + /* + * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total. + * Early datasheets said to poll the reset bit, but now they say that + * it "is not a reliable indicator and subsequently should be ignored." + * We wait at least 10ms. + */ + wait_start_time = jiffies; + while (jiffies - wait_start_time <= 1*HZ/100) + barrier(); + + /* + * Reset RBCR[01] back to zero as per magic incantation. + */ + outb_p(0x00, e8390_base+EN0_RCNTLO); + outb_p(0x00, e8390_base+EN0_RCNTHI); + + /* + * See if any Tx was interrupted or not. According to NS, this + * step is vital, and skipping it will cause no end of havoc. + */ + if (was_txing) { + unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR); + if (!tx_completed) must_resend = 1; + } + + /* + * Have to enter loopback mode and then restart the NIC before + * you are allowed to slurp packets up off the ring. + */ + outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); + outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD); + + /* + * Clear the Rx ring of all the debris, and ack the interrupt. + */ + ei_receive(dev); + outb_p(ENISR_OVER, e8390_base+EN0_ISR); + + /* + * Leave loopback mode, and resend any packet that got stopped. + */ + outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); + if (must_resend) + outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD); + +} + +static struct enet_statistics *get_stats(struct device *dev) +{ + short ioaddr = dev->base_addr; + struct ei_device *ei_local = (struct ei_device *) dev->priv; + + /* If the card is stopped, just return the present stats. */ + if (dev->start == 0) return &ei_local->stat; + + /* Read the counter registers, assuming we are in page 0. */ + ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0); + ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1); + ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2); + + return &ei_local->stat; +} + +/* + * Set or clear the multicast filter for this adaptor. + */ + +static void set_multicast_list(struct device *dev) +{ + short ioaddr = dev->base_addr; + + if(dev->flags&IFF_PROMISC) + { + outb_p(E8390_RXCONFIG | 0x18, ioaddr + EN0_RXCR); + } + else if((dev->flags&IFF_ALLMULTI)||dev->mc_list) + { + /* The multicast-accept list is initialized to accept-all, and we + rely on higher-level filtering for now. */ + outb_p(E8390_RXCONFIG | 0x08, ioaddr + EN0_RXCR); + } + else + outb_p(E8390_RXCONFIG, ioaddr + EN0_RXCR); +} + +/* Initialize the rest of the 8390 device structure. */ +int ethdev_init(struct device *dev) +{ + if (ei_debug > 1) + printk(version); + + if (dev->priv == NULL) { + struct ei_device *ei_local; + + dev->priv = kmalloc(sizeof(struct ei_device), GFP_KERNEL); + if (dev->priv == NULL) + return -ENOMEM; + memset(dev->priv, 0, sizeof(struct ei_device)); + ei_local = (struct ei_device *)dev->priv; + } + + dev->hard_start_xmit = &ei_start_xmit; + dev->get_stats = get_stats; + dev->set_multicast_list = &set_multicast_list; + + ether_setup(dev); + + return 0; +} + + +/* This page of functions should be 8390 generic */ +/* Follow National Semi's recommendations for initializing the "NIC". */ +void NS8390_init(struct device *dev, int startp) +{ + int e8390_base = dev->base_addr; + struct ei_device *ei_local = (struct ei_device *) dev->priv; + int i; + int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48; + unsigned long flags; + + /* Follow National Semi's recommendations for initing the DP83902. */ + outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base); /* 0x21 */ + outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */ + /* Clear the remote byte count registers. */ + outb_p(0x00, e8390_base + EN0_RCNTLO); + outb_p(0x00, e8390_base + EN0_RCNTHI); + /* Set to monitor and loopback mode -- this is vital!. */ + outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */ + outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */ + /* Set the transmit page and receive ring. */ + outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR); + ei_local->tx1 = ei_local->tx2 = 0; + outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG); + outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/ + ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */ + outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG); + /* Clear the pending interrupts and mask. */ + outb_p(0xFF, e8390_base + EN0_ISR); + outb_p(0x00, e8390_base + EN0_IMR); + + /* Copy the station address into the DS8390 registers, + and set the multicast hash bitmap to receive all multicasts. */ + save_flags(flags); + cli(); + outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base); /* 0x61 */ + for(i = 0; i < 6; i++) { + outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS + i); + } + /* Initialize the multicast list to accept-all. If we enable multicast + the higher levels can do the filtering. */ + for(i = 0; i < 8; i++) + outb_p(0xff, e8390_base + EN1_MULT + i); + + outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG); + outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base); + restore_flags(flags); + dev->tbusy = 0; + dev->interrupt = 0; + ei_local->tx1 = ei_local->tx2 = 0; + ei_local->txing = 0; + if (startp) { + outb_p(0xff, e8390_base + EN0_ISR); + outb_p(ENISR_ALL, e8390_base + EN0_IMR); + outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base); + outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */ + /* 3c503 TechMan says rxconfig only after the NIC is started. */ + outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */ + dev->set_multicast_list(dev); /* Get the multicast status right if this + was a reset. */ + } + return; +} + +/* Trigger a transmit start, assuming the length is valid. */ +static void NS8390_trigger_send(struct device *dev, unsigned int length, + int start_page) +{ + int e8390_base = dev->base_addr; + + outb_p(E8390_NODMA+E8390_PAGE0, e8390_base); + + if (inb_p(e8390_base) & E8390_TRANS) { + printk("%s: trigger_send() called with the transmitter busy.\n", + dev->name); + return; + } + outb_p(length & 0xff, e8390_base + EN0_TCNTLO); + outb_p(length >> 8, e8390_base + EN0_TCNTHI); + outb_p(start_page, e8390_base + EN0_TPSR); + outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base); + return; +} + +#ifdef MODULE + +int init_module(void) +{ + return 0; +} + +void +cleanup_module(void) +{ +} +#endif /* MODULE */ + +/* + * Local variables: + * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 8390.c" + * version-control: t + * kept-new-versions: 5 + * c-indent-level: 4 + * tab-width: 4 + * End: + */ |