diff options
Diffstat (limited to 'drivers/net/ethernet/i825xx/eexpress.c')
| -rw-r--r-- | drivers/net/ethernet/i825xx/eexpress.c | 1720 |
1 files changed, 1720 insertions, 0 deletions
diff --git a/drivers/net/ethernet/i825xx/eexpress.c b/drivers/net/ethernet/i825xx/eexpress.c new file mode 100644 index 000000000000..3a9580f3d4dd --- /dev/null +++ b/drivers/net/ethernet/i825xx/eexpress.c @@ -0,0 +1,1720 @@ +/* Intel EtherExpress 16 device driver for Linux + * + * Written by John Sullivan, 1995 + * based on original code by Donald Becker, with changes by + * Alan Cox and Pauline Middelink. + * + * Support for 8-bit mode by Zoltan Szilagyi <zoltans@cs.arizona.edu> + * + * Many modifications, and currently maintained, by + * Philip Blundell <philb@gnu.org> + * Added the Compaq LTE Alan Cox <alan@lxorguk.ukuu.org.uk> + * Added MCA support Adam Fritzler + * + * Note - this driver is experimental still - it has problems on faster + * machines. Someone needs to sit down and go through it line by line with + * a databook... + */ + +/* The EtherExpress 16 is a fairly simple card, based on a shared-memory + * design using the i82586 Ethernet coprocessor. It bears no relationship, + * as far as I know, to the similarly-named "EtherExpress Pro" range. + * + * Historically, Linux support for these cards has been very bad. However, + * things seem to be getting better slowly. + */ + +/* If your card is confused about what sort of interface it has (eg it + * persistently reports "10baseT" when none is fitted), running 'SOFTSET /BART' + * or 'SOFTSET /LISA' from DOS seems to help. + */ + +/* Here's the scoop on memory mapping. + * + * There are three ways to access EtherExpress card memory: either using the + * shared-memory mapping, or using PIO through the dataport, or using PIO + * through the "shadow memory" ports. + * + * The shadow memory system works by having the card map some of its memory + * as follows: + * + * (the low five bits of the SMPTR are ignored) + * + * base+0x4000..400f memory at SMPTR+0..15 + * base+0x8000..800f memory at SMPTR+16..31 + * base+0xc000..c007 dubious stuff (memory at SMPTR+16..23 apparently) + * base+0xc008..c00f memory at 0x0008..0x000f + * + * This last set (the one at c008) is particularly handy because the SCB + * lives at 0x0008. So that set of ports gives us easy random access to data + * in the SCB without having to mess around setting up pointers and the like. + * We always use this method to access the SCB (via the scb_xx() functions). + * + * Dataport access works by aiming the appropriate (read or write) pointer + * at the first address you're interested in, and then reading or writing from + * the dataport. The pointers auto-increment after each transfer. We use + * this for data transfer. + * + * We don't use the shared-memory system because it allegedly doesn't work on + * all cards, and because it's a bit more prone to go wrong (it's one more + * thing to configure...). + */ + +/* Known bugs: + * + * - The card seems to want to give us two interrupts every time something + * happens, where just one would be better. + */ + +/* + * + * Note by Zoltan Szilagyi 10-12-96: + * + * I've succeeded in eliminating the "CU wedged" messages, and hence the + * lockups, which were only occurring with cards running in 8-bit mode ("force + * 8-bit operation" in Intel's SoftSet utility). This version of the driver + * sets the 82586 and the ASIC to 8-bit mode at startup; it also stops the + * CU before submitting a packet for transmission, and then restarts it as soon + * as the process of handing the packet is complete. This is definitely an + * unnecessary slowdown if the card is running in 16-bit mode; therefore one + * should detect 16-bit vs 8-bit mode from the EEPROM settings and act + * accordingly. In 8-bit mode with this bugfix I'm getting about 150 K/s for + * ftp's, which is significantly better than I get in DOS, so the overhead of + * stopping and restarting the CU with each transmit is not prohibitive in + * practice. + * + * Update by David Woodhouse 11/5/99: + * + * I've seen "CU wedged" messages in 16-bit mode, on the Alpha architecture. + * I assume that this is because 16-bit accesses are actually handled as two + * 8-bit accesses. + */ + +#ifdef __alpha__ +#define LOCKUP16 1 +#endif +#ifndef LOCKUP16 +#define LOCKUP16 0 +#endif + +#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/string.h> +#include <linux/in.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/mca-legacy.h> +#include <linux/spinlock.h> +#include <linux/bitops.h> +#include <linux/jiffies.h> + +#include <asm/system.h> +#include <asm/io.h> +#include <asm/irq.h> + +#ifndef NET_DEBUG +#define NET_DEBUG 4 +#endif + +#include "eexpress.h" + +#define EEXP_IO_EXTENT 16 + +/* + * Private data declarations + */ + +struct net_local +{ + unsigned long last_tx; /* jiffies when last transmit started */ + unsigned long init_time; /* jiffies when eexp_hw_init586 called */ + unsigned short rx_first; /* first rx buf, same as RX_BUF_START */ + unsigned short rx_last; /* last rx buf */ + unsigned short rx_ptr; /* first rx buf to look at */ + unsigned short tx_head; /* next free tx buf */ + unsigned short tx_reap; /* first in-use tx buf */ + unsigned short tx_tail; /* previous tx buf to tx_head */ + unsigned short tx_link; /* last known-executing tx buf */ + unsigned short last_tx_restart; /* set to tx_link when we + restart the CU */ + unsigned char started; + unsigned short rx_buf_start; + unsigned short rx_buf_end; + unsigned short num_tx_bufs; + unsigned short num_rx_bufs; + unsigned char width; /* 0 for 16bit, 1 for 8bit */ + unsigned char was_promisc; + unsigned char old_mc_count; + spinlock_t lock; +}; + +/* This is the code and data that is downloaded to the EtherExpress card's + * memory at boot time. + */ + +static unsigned short start_code[] = { +/* 0x0000 */ + 0x0001, /* ISCP: busy - cleared after reset */ + 0x0008,0x0000,0x0000, /* offset,address (lo,hi) of SCB */ + + 0x0000,0x0000, /* SCB: status, commands */ + 0x0000,0x0000, /* links to first command block, + first receive descriptor */ + 0x0000,0x0000, /* CRC error, alignment error counts */ + 0x0000,0x0000, /* out of resources, overrun error counts */ + + 0x0000,0x0000, /* pad */ + 0x0000,0x0000, + +/* 0x20 -- start of 82586 CU program */ +#define CONF_LINK 0x20 + 0x0000,Cmd_Config, + 0x0032, /* link to next command */ + 0x080c, /* 12 bytes follow : fifo threshold=8 */ + 0x2e40, /* don't rx bad frames + * SRDY/ARDY => ext. sync. : preamble len=8 + * take addresses from data buffers + * 6 bytes/address + */ + 0x6000, /* default backoff method & priority + * interframe spacing = 0x60 */ + 0xf200, /* slot time=0x200 + * max collision retry = 0xf */ +#define CONF_PROMISC 0x2e + 0x0000, /* no HDLC : normal CRC : enable broadcast + * disable promiscuous/multicast modes */ + 0x003c, /* minimum frame length = 60 octets) */ + + 0x0000,Cmd_SetAddr, + 0x003e, /* link to next command */ +#define CONF_HWADDR 0x38 + 0x0000,0x0000,0x0000, /* hardware address placed here */ + + 0x0000,Cmd_MCast, + 0x0076, /* link to next command */ +#define CONF_NR_MULTICAST 0x44 + 0x0000, /* number of bytes in multicast address(es) */ +#define CONF_MULTICAST 0x46 + 0x0000, 0x0000, 0x0000, /* some addresses */ + 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, + +#define CONF_DIAG_RESULT 0x76 + 0x0000, Cmd_Diag, + 0x007c, /* link to next command */ + + 0x0000,Cmd_TDR|Cmd_INT, + 0x0084, +#define CONF_TDR_RESULT 0x82 + 0x0000, + + 0x0000,Cmd_END|Cmd_Nop, /* end of configure sequence */ + 0x0084 /* dummy link */ +}; + +/* maps irq number to EtherExpress magic value */ +static char irqrmap[] = { 0,0,1,2,3,4,0,0,0,1,5,6,0,0,0,0 }; + +#ifdef CONFIG_MCA_LEGACY +/* mapping of the first four bits of the second POS register */ +static unsigned short mca_iomap[] = { + 0x270, 0x260, 0x250, 0x240, 0x230, 0x220, 0x210, 0x200, + 0x370, 0x360, 0x350, 0x340, 0x330, 0x320, 0x310, 0x300 +}; +/* bits 5-7 of the second POS register */ +static char mca_irqmap[] = { 12, 9, 3, 4, 5, 10, 11, 15 }; +#endif + +/* + * Prototypes for Linux interface + */ + +static int eexp_open(struct net_device *dev); +static int eexp_close(struct net_device *dev); +static void eexp_timeout(struct net_device *dev); +static netdev_tx_t eexp_xmit(struct sk_buff *buf, + struct net_device *dev); + +static irqreturn_t eexp_irq(int irq, void *dev_addr); +static void eexp_set_multicast(struct net_device *dev); + +/* + * Prototypes for hardware access functions + */ + +static void eexp_hw_rx_pio(struct net_device *dev); +static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf, + unsigned short len); +static int eexp_hw_probe(struct net_device *dev,unsigned short ioaddr); +static unsigned short eexp_hw_readeeprom(unsigned short ioaddr, + unsigned char location); + +static unsigned short eexp_hw_lasttxstat(struct net_device *dev); +static void eexp_hw_txrestart(struct net_device *dev); + +static void eexp_hw_txinit (struct net_device *dev); +static void eexp_hw_rxinit (struct net_device *dev); + +static void eexp_hw_init586 (struct net_device *dev); +static void eexp_setup_filter (struct net_device *dev); + +static char *eexp_ifmap[]={"AUI", "BNC", "RJ45"}; +enum eexp_iftype {AUI=0, BNC=1, TPE=2}; + +#define STARTED_RU 2 +#define STARTED_CU 1 + +/* + * Primitive hardware access functions. + */ + +static inline unsigned short scb_status(struct net_device *dev) +{ + return inw(dev->base_addr + 0xc008); +} + +static inline unsigned short scb_rdcmd(struct net_device *dev) +{ + return inw(dev->base_addr + 0xc00a); +} + +static inline void scb_command(struct net_device *dev, unsigned short cmd) +{ + outw(cmd, dev->base_addr + 0xc00a); +} + +static inline void scb_wrcbl(struct net_device *dev, unsigned short val) +{ + outw(val, dev->base_addr + 0xc00c); +} + +static inline void scb_wrrfa(struct net_device *dev, unsigned short val) +{ + outw(val, dev->base_addr + 0xc00e); +} + +static inline void set_loopback(struct net_device *dev) +{ + outb(inb(dev->base_addr + Config) | 2, dev->base_addr + Config); +} + +static inline void clear_loopback(struct net_device *dev) +{ + outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config); +} + +static inline unsigned short int SHADOW(short int addr) +{ + addr &= 0x1f; + if (addr > 0xf) addr += 0x3ff0; + return addr + 0x4000; +} + +/* + * Linux interface + */ + +/* + * checks for presence of EtherExpress card + */ + +static int __init do_express_probe(struct net_device *dev) +{ + unsigned short *port; + static unsigned short ports[] = { 0x240,0x300,0x310,0x270,0x320,0x340,0 }; + unsigned short ioaddr = dev->base_addr; + int dev_irq = dev->irq; + int err; + + dev->if_port = 0xff; /* not set */ + +#ifdef CONFIG_MCA_LEGACY + if (MCA_bus) { + int slot = 0; + + /* + * Only find one card at a time. Subsequent calls + * will find others, however, proper multicard MCA + * probing and setup can't be done with the + * old-style Space.c init routines. -- ASF + */ + while (slot != MCA_NOTFOUND) { + int pos0, pos1; + + slot = mca_find_unused_adapter(0x628B, slot); + if (slot == MCA_NOTFOUND) + break; + + pos0 = mca_read_stored_pos(slot, 2); + pos1 = mca_read_stored_pos(slot, 3); + ioaddr = mca_iomap[pos1&0xf]; + + dev->irq = mca_irqmap[(pos1>>4)&0x7]; + + /* + * XXX: Transceiver selection is done + * differently on the MCA version. + * How to get it to select something + * other than external/AUI is currently + * unknown. This code is just for looks. -- ASF + */ + if ((pos0 & 0x7) == 0x1) + dev->if_port = AUI; + else if ((pos0 & 0x7) == 0x5) { + if (pos1 & 0x80) + dev->if_port = BNC; + else + dev->if_port = TPE; + } + + mca_set_adapter_name(slot, "Intel EtherExpress 16 MCA"); + mca_set_adapter_procfn(slot, NULL, dev); + mca_mark_as_used(slot); + + break; + } + } +#endif + if (ioaddr&0xfe00) { + if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) + return -EBUSY; + err = eexp_hw_probe(dev,ioaddr); + release_region(ioaddr, EEXP_IO_EXTENT); + return err; + } else if (ioaddr) + return -ENXIO; + + for (port=&ports[0] ; *port ; port++ ) + { + unsigned short sum = 0; + int i; + if (!request_region(*port, EEXP_IO_EXTENT, "EtherExpress")) + continue; + for ( i=0 ; i<4 ; i++ ) + { + unsigned short t; + t = inb(*port + ID_PORT); + sum |= (t>>4) << ((t & 0x03)<<2); + } + if (sum==0xbaba && !eexp_hw_probe(dev,*port)) { + release_region(*port, EEXP_IO_EXTENT); + return 0; + } + release_region(*port, EEXP_IO_EXTENT); + dev->irq = dev_irq; + } + return -ENODEV; +} + +#ifndef MODULE +struct net_device * __init express_probe(int unit) +{ + struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); + int err; + + if (!dev) + return ERR_PTR(-ENOMEM); + + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + + err = do_express_probe(dev); + if (!err) + return dev; + free_netdev(dev); + return ERR_PTR(err); +} +#endif + +/* + * open and initialize the adapter, ready for use + */ + +static int eexp_open(struct net_device *dev) +{ + int ret; + unsigned short ioaddr = dev->base_addr; + struct net_local *lp = netdev_priv(dev); + +#if NET_DEBUG > 6 + printk(KERN_DEBUG "%s: eexp_open()\n", dev->name); +#endif + + if (!dev->irq || !irqrmap[dev->irq]) + return -ENXIO; + + ret = request_irq(dev->irq, eexp_irq, 0, dev->name, dev); + if (ret) + return ret; + + if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) { + printk(KERN_WARNING "EtherExpress io port %x, is busy.\n" + , ioaddr); + goto err_out1; + } + if (!request_region(ioaddr+0x4000, EEXP_IO_EXTENT, "EtherExpress shadow")) { + printk(KERN_WARNING "EtherExpress io port %x, is busy.\n" + , ioaddr+0x4000); + goto err_out2; + } + if (!request_region(ioaddr+0x8000, EEXP_IO_EXTENT, "EtherExpress shadow")) { + printk(KERN_WARNING "EtherExpress io port %x, is busy.\n" + , ioaddr+0x8000); + goto err_out3; + } + if (!request_region(ioaddr+0xc000, EEXP_IO_EXTENT, "EtherExpress shadow")) { + printk(KERN_WARNING "EtherExpress io port %x, is busy.\n" + , ioaddr+0xc000); + goto err_out4; + } + + if (lp->width) { + printk("%s: forcing ASIC to 8-bit mode\n", dev->name); + outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config); + } + + eexp_hw_init586(dev); + netif_start_queue(dev); +#if NET_DEBUG > 6 + printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name); +#endif + return 0; + + err_out4: + release_region(ioaddr+0x8000, EEXP_IO_EXTENT); + err_out3: + release_region(ioaddr+0x4000, EEXP_IO_EXTENT); + err_out2: + release_region(ioaddr, EEXP_IO_EXTENT); + err_out1: + free_irq(dev->irq, dev); + return -EBUSY; +} + +/* + * close and disable the interface, leaving the 586 in reset. + */ + +static int eexp_close(struct net_device *dev) +{ + unsigned short ioaddr = dev->base_addr; + struct net_local *lp = netdev_priv(dev); + + int irq = dev->irq; + + netif_stop_queue(dev); + + outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ); + lp->started = 0; + scb_command(dev, SCB_CUsuspend|SCB_RUsuspend); + outb(0,ioaddr+SIGNAL_CA); + free_irq(irq,dev); + outb(i586_RST,ioaddr+EEPROM_Ctrl); + release_region(ioaddr, EEXP_IO_EXTENT); + release_region(ioaddr+0x4000, 16); + release_region(ioaddr+0x8000, 16); + release_region(ioaddr+0xc000, 16); + + return 0; +} + +/* + * This gets called when a higher level thinks we are broken. Check that + * nothing has become jammed in the CU. + */ + +static void unstick_cu(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + unsigned short ioaddr = dev->base_addr; + + if (lp->started) + { + if (time_after(jiffies, dev_trans_start(dev) + HZ/2)) + { + if (lp->tx_link==lp->last_tx_restart) + { + unsigned short boguscount=200,rsst; + printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n", + dev->name, scb_status(dev)); + eexp_hw_txinit(dev); + lp->last_tx_restart = 0; + scb_wrcbl(dev, lp->tx_link); + scb_command(dev, SCB_CUstart); + outb(0,ioaddr+SIGNAL_CA); + while (!SCB_complete(rsst=scb_status(dev))) + { + if (!--boguscount) + { + boguscount=200; + printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n", + dev->name,rsst); + scb_wrcbl(dev, lp->tx_link); + scb_command(dev, SCB_CUstart); + outb(0,ioaddr+SIGNAL_CA); + } + } + netif_wake_queue(dev); + } + else + { + unsigned short status = scb_status(dev); + if (SCB_CUdead(status)) + { + unsigned short txstatus = eexp_hw_lasttxstat(dev); + printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n", + dev->name, status, txstatus); + eexp_hw_txrestart(dev); + } + else + { + unsigned short txstatus = eexp_hw_lasttxstat(dev); + if (netif_queue_stopped(dev) && !txstatus) + { + printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n", + dev->name,status,txstatus); + eexp_hw_init586(dev); + netif_wake_queue(dev); + } + else + { + printk(KERN_WARNING "%s: transmit timed out\n", dev->name); + } + } + } + } + } + else + { + if (time_after(jiffies, lp->init_time + 10)) + { + unsigned short status = scb_status(dev); + printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n", + dev->name, status); + eexp_hw_init586(dev); + netif_wake_queue(dev); + } + } +} + +static void eexp_timeout(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); +#ifdef CONFIG_SMP + unsigned long flags; +#endif + int status; + + disable_irq(dev->irq); + + /* + * Best would be to use synchronize_irq(); spin_lock() here + * lets make it work first.. + */ + +#ifdef CONFIG_SMP + spin_lock_irqsave(&lp->lock, flags); +#endif + + status = scb_status(dev); + unstick_cu(dev); + printk(KERN_INFO "%s: transmit timed out, %s?\n", dev->name, + (SCB_complete(status)?"lost interrupt": + "board on fire")); + dev->stats.tx_errors++; + lp->last_tx = jiffies; + if (!SCB_complete(status)) { + scb_command(dev, SCB_CUabort); + outb(0,dev->base_addr+SIGNAL_CA); + } + netif_wake_queue(dev); +#ifdef CONFIG_SMP + spin_unlock_irqrestore(&lp->lock, flags); +#endif +} + +/* + * Called to transmit a packet, or to allow us to right ourselves + * if the kernel thinks we've died. + */ +static netdev_tx_t eexp_xmit(struct sk_buff *buf, struct net_device *dev) +{ + short length = buf->len; +#ifdef CONFIG_SMP + struct net_local *lp = netdev_priv(dev); + unsigned long flags; +#endif + +#if NET_DEBUG > 6 + printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name); +#endif + + if (buf->len < ETH_ZLEN) { + if (skb_padto(buf, ETH_ZLEN)) + return NETDEV_TX_OK; + length = ETH_ZLEN; + } + + disable_irq(dev->irq); + + /* + * Best would be to use synchronize_irq(); spin_lock() here + * lets make it work first.. + */ + +#ifdef CONFIG_SMP + spin_lock_irqsave(&lp->lock, flags); +#endif + + { + unsigned short *data = (unsigned short *)buf->data; + + dev->stats.tx_bytes += length; + + eexp_hw_tx_pio(dev,data,length); + } + dev_kfree_skb(buf); +#ifdef CONFIG_SMP + spin_unlock_irqrestore(&lp->lock, flags); +#endif + enable_irq(dev->irq); + return NETDEV_TX_OK; +} + +/* + * Handle an EtherExpress interrupt + * If we've finished initializing, start the RU and CU up. + * If we've already started, reap tx buffers, handle any received packets, + * check to make sure we've not become wedged. + */ + +static unsigned short eexp_start_irq(struct net_device *dev, + unsigned short status) +{ + unsigned short ack_cmd = SCB_ack(status); + struct net_local *lp = netdev_priv(dev); + unsigned short ioaddr = dev->base_addr; + if ((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) { + short diag_status, tdr_status; + while (SCB_CUstat(status)==2) + status = scb_status(dev); +#if NET_DEBUG > 4 + printk("%s: CU went non-active (status %04x)\n", + dev->name, status); +#endif + + outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR); + diag_status = inw(ioaddr + SHADOW(CONF_DIAG_RESULT)); + if (diag_status & 1<<11) { + printk(KERN_WARNING "%s: 82586 failed self-test\n", + dev->name); + } else if (!(diag_status & 1<<13)) { + printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name); + } + + outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR); + tdr_status = inw(ioaddr + SHADOW(CONF_TDR_RESULT)); + if (tdr_status & (TDR_SHORT|TDR_OPEN)) { + printk(KERN_WARNING "%s: TDR reports cable %s at %d tick%s\n", dev->name, (tdr_status & TDR_SHORT)?"short":"broken", tdr_status & TDR_TIME, ((tdr_status & TDR_TIME) != 1) ? "s" : ""); + } + else if (tdr_status & TDR_XCVRPROBLEM) { + printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name); + } + else if (tdr_status & TDR_LINKOK) { +#if NET_DEBUG > 4 + printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name); +#endif + } else { + printk("%s: TDR is ga-ga (status %04x)\n", dev->name, + tdr_status); + } + + lp->started |= STARTED_CU; + scb_wrcbl(dev, lp->tx_link); + /* if the RU isn't running, start it now */ + if (!(lp->started & STARTED_RU)) { + ack_cmd |= SCB_RUstart; + scb_wrrfa(dev, lp->rx_buf_start); + lp->rx_ptr = lp->rx_buf_start; + lp->started |= STARTED_RU; + } + ack_cmd |= SCB_CUstart | 0x2000; + } + + if ((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) && SCB_RUstat(status)==4) + lp->started|=STARTED_RU; + + return ack_cmd; +} + +static void eexp_cmd_clear(struct net_device *dev) +{ + unsigned long int oldtime = jiffies; + while (scb_rdcmd(dev) && (time_before(jiffies, oldtime + 10))); + if (scb_rdcmd(dev)) { + printk("%s: command didn't clear\n", dev->name); + } +} + +static irqreturn_t eexp_irq(int dummy, void *dev_info) +{ + struct net_device *dev = dev_info; + struct net_local *lp; + unsigned short ioaddr,status,ack_cmd; + unsigned short old_read_ptr, old_write_ptr; + + lp = netdev_priv(dev); + ioaddr = dev->base_addr; + + spin_lock(&lp->lock); + + old_read_ptr = inw(ioaddr+READ_PTR); + old_write_ptr = inw(ioaddr+WRITE_PTR); + + outb(SIRQ_dis|irqrmap[dev->irq], ioaddr+SET_IRQ); + + status = scb_status(dev); + +#if NET_DEBUG > 4 + printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status); +#endif + + if (lp->started == (STARTED_CU | STARTED_RU)) { + + do { + eexp_cmd_clear(dev); + + ack_cmd = SCB_ack(status); + scb_command(dev, ack_cmd); + outb(0,ioaddr+SIGNAL_CA); + + eexp_cmd_clear(dev); + + if (SCB_complete(status)) { + if (!eexp_hw_lasttxstat(dev)) { + printk("%s: tx interrupt but no status\n", dev->name); + } + } + + if (SCB_rxdframe(status)) + eexp_hw_rx_pio(dev); + + status = scb_status(dev); + } while (status & 0xc000); + + if (SCB_RUdead(status)) + { + printk(KERN_WARNING "%s: RU stopped: status %04x\n", + dev->name,status); +#if 0 + printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd); + outw(lp->cur_rfd, ioaddr+READ_PTR); + printk(KERN_WARNING "%s: [%04x]\n", dev->name, inw(ioaddr+DATAPORT)); + outw(lp->cur_rfd+6, ioaddr+READ_PTR); + printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd= inw(ioaddr+DATAPORT)); + outw(rbd, ioaddr+READ_PTR); + printk(KERN_WARNING "%s: [%04x %04x] ", dev->name, inw(ioaddr+DATAPORT), inw(ioaddr+DATAPORT)); + outw(rbd+8, ioaddr+READ_PTR); + printk("[%04x]\n", inw(ioaddr+DATAPORT)); +#endif + dev->stats.rx_errors++; +#if 1 + eexp_hw_rxinit(dev); +#else + lp->cur_rfd = lp->first_rfd; +#endif + scb_wrrfa(dev, lp->rx_buf_start); + scb_command(dev, SCB_RUstart); + outb(0,ioaddr+SIGNAL_CA); + } + } else { + if (status & 0x8000) + ack_cmd = eexp_start_irq(dev, status); + else + ack_cmd = SCB_ack(status); + scb_command(dev, ack_cmd); + outb(0,ioaddr+SIGNAL_CA); + } + + eexp_cmd_clear(dev); + + outb(SIRQ_en|irqrmap[dev->irq], ioaddr+SET_IRQ); + +#if NET_DEBUG > 6 + printk("%s: leaving eexp_irq()\n", dev->name); +#endif + outw(old_read_ptr, ioaddr+READ_PTR); + outw(old_write_ptr, ioaddr+WRITE_PTR); + + spin_unlock(&lp->lock); + return IRQ_HANDLED; +} + +/* + * Hardware access functions + */ + +/* + * Set the cable type to use. + */ + +static void eexp_hw_set_interface(struct net_device *dev) +{ + unsigned char oldval = inb(dev->base_addr + 0x300e); + oldval &= ~0x82; + switch (dev->if_port) { + case TPE: + oldval |= 0x2; + case BNC: + oldval |= 0x80; + break; + } + outb(oldval, dev->base_addr+0x300e); + mdelay(20); +} + +/* + * Check all the receive buffers, and hand any received packets + * to the upper levels. Basic sanity check on each frame + * descriptor, though we don't bother trying to fix broken ones. + */ + +static void eexp_hw_rx_pio(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + unsigned short rx_block = lp->rx_ptr; + unsigned short boguscount = lp->num_rx_bufs; + unsigned short ioaddr = dev->base_addr; + unsigned short status; + +#if NET_DEBUG > 6 + printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name); +#endif + + do { + unsigned short rfd_cmd, rx_next, pbuf, pkt_len; + + outw(rx_block, ioaddr + READ_PTR); + status = inw(ioaddr + DATAPORT); + + if (FD_Done(status)) + { + rfd_cmd = inw(ioaddr + DATAPORT); + rx_next = inw(ioaddr + DATAPORT); + pbuf = inw(ioaddr + DATAPORT); + + outw(pbuf, ioaddr + READ_PTR); + pkt_len = inw(ioaddr + DATAPORT); + + if (rfd_cmd!=0x0000) + { + printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n", + dev->name, rfd_cmd); + continue; + } + else if (pbuf!=rx_block+0x16) + { + printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n", + dev->name, rx_block+0x16, pbuf); + continue; + } + else if ((pkt_len & 0xc000)!=0xc000) + { + printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n", + dev->name, pkt_len & 0xc000); + continue; + } + else if (!FD_OK(status)) + { + dev->stats.rx_errors++; + if (FD_CRC(status)) + dev->stats.rx_crc_errors++; + if (FD_Align(status)) + dev->stats.rx_frame_errors++; + if (FD_Resrc(status)) + dev->stats.rx_fifo_errors++; + if (FD_DMA(status)) + dev->stats.rx_over_errors++; + if (FD_Short(status)) + dev->stats.rx_length_errors++; + } + else + { + struct sk_buff *skb; + pkt_len &= 0x3fff; + skb = dev_alloc_skb(pkt_len+16); + if (skb == NULL) + { + printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name); + dev->stats.rx_dropped++; + break; + } + skb_reserve(skb, 2); + outw(pbuf+10, ioaddr+READ_PTR); + insw(ioaddr+DATAPORT, skb_put(skb,pkt_len),(pkt_len+1)>>1); + skb->protocol = eth_type_trans(skb,dev); + netif_rx(skb); + dev->stats.rx_packets++; + dev->stats.rx_bytes += pkt_len; + } + outw(rx_block, ioaddr+WRITE_PTR); + outw(0, ioaddr+DATAPORT); + outw(0, ioaddr+DATAPORT); + rx_block = rx_next; + } + } while (FD_Done(status) && boguscount--); + lp->rx_ptr = rx_block; +} + +/* + * Hand a packet to the card for transmission + * If we get here, we MUST have already checked + * to make sure there is room in the transmit + * buffer region. + */ + +static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf, + unsigned short len) +{ + struct net_local *lp = netdev_priv(dev); + unsigned short ioaddr = dev->base_addr; + + if (LOCKUP16 || lp->width) { + /* Stop the CU so that there is no chance that it + jumps off to a bogus address while we are writing the + pointer to the next transmit packet in 8-bit mode -- + this eliminates the "CU wedged" errors in 8-bit mode. + (Zoltan Szilagyi 10-12-96) */ + scb_command(dev, SCB_CUsuspend); + outw(0xFFFF, ioaddr+SIGNAL_CA); + } + + outw(lp->tx_head, ioaddr + WRITE_PTR); + + outw(0x0000, ioaddr + DATAPORT); + outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT); + outw(lp->tx_head+0x08, ioaddr + DATAPORT); + outw(lp->tx_head+0x0e, ioaddr + DATAPORT); + + outw(0x0000, ioaddr + DATAPORT); + outw(0x0000, ioaddr + DATAPORT); + outw(lp->tx_head+0x08, ioaddr + DATAPORT); + + outw(0x8000|len, ioaddr + DATAPORT); + outw(-1, ioaddr + DATAPORT); + outw(lp->tx_head+0x16, ioaddr + DATAPORT); + outw(0, ioaddr + DATAPORT); + + outsw(ioaddr + DATAPORT, buf, (len+1)>>1); + + outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR); + outw(lp->tx_head, ioaddr + DATAPORT); + + dev->trans_start = jiffies; + lp->tx_tail = lp->tx_head; + if (lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE)) + lp->tx_head = TX_BUF_START; + else + lp->tx_head += TX_BUF_SIZE; + if (lp->tx_head != lp->tx_reap) + netif_wake_queue(dev); + + if (LOCKUP16 || lp->width) { + /* Restart the CU so that the packet can actually + be transmitted. (Zoltan Szilagyi 10-12-96) */ + scb_command(dev, SCB_CUresume); + outw(0xFFFF, ioaddr+SIGNAL_CA); + } + + dev->stats.tx_packets++; + lp->last_tx = jiffies; +} + +static const struct net_device_ops eexp_netdev_ops = { + .ndo_open = eexp_open, + .ndo_stop = eexp_close, + .ndo_start_xmit = eexp_xmit, + .ndo_set_rx_mode = eexp_set_multicast, + .ndo_tx_timeout = eexp_timeout, + .ndo_change_mtu = eth_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +/* + * Sanity check the suspected EtherExpress card + * Read hardware address, reset card, size memory and initialize buffer + * memory pointers. These are held in netdev_priv(), in case someone has more + * than one card in a machine. + */ + +static int __init eexp_hw_probe(struct net_device *dev, unsigned short ioaddr) +{ + unsigned short hw_addr[3]; + unsigned char buswidth; + unsigned int memory_size; + int i; + unsigned short xsum = 0; + struct net_local *lp = netdev_priv(dev); + + printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr); + + outb(ASIC_RST, ioaddr+EEPROM_Ctrl); + outb(0, ioaddr+EEPROM_Ctrl); + udelay(500); + outb(i586_RST, ioaddr+EEPROM_Ctrl); + + hw_addr[0] = eexp_hw_readeeprom(ioaddr,2); + hw_addr[1] = eexp_hw_readeeprom(ioaddr,3); + hw_addr[2] = eexp_hw_readeeprom(ioaddr,4); + + /* Standard Address or Compaq LTE Address */ + if (!((hw_addr[2]==0x00aa && ((hw_addr[1] & 0xff00)==0x0000)) || + (hw_addr[2]==0x0080 && ((hw_addr[1] & 0xff00)==0x5F00)))) + { + printk(" rejected: invalid address %04x%04x%04x\n", + hw_addr[2],hw_addr[1],hw_addr[0]); + return -ENODEV; + } + + /* Calculate the EEPROM checksum. Carry on anyway if it's bad, + * though. + */ + for (i = 0; i < 64; i++) + xsum += eexp_hw_readeeprom(ioaddr, i); + if (xsum != 0xbaba) + printk(" (bad EEPROM xsum 0x%02x)", xsum); + + dev->base_addr = ioaddr; + for ( i=0 ; i<6 ; i++ ) + dev->dev_addr[i] = ((unsigned char *)hw_addr)[5-i]; + + { + static const char irqmap[] = { 0, 9, 3, 4, 5, 10, 11, 0 }; + unsigned short setupval = eexp_hw_readeeprom(ioaddr,0); + + /* Use the IRQ from EEPROM if none was given */ + if (!dev->irq) + dev->irq = irqmap[setupval>>13]; + + if (dev->if_port == 0xff) { + dev->if_port = !(setupval & 0x1000) ? AUI : + eexp_hw_readeeprom(ioaddr,5) & 0x1 ? TPE : BNC; + } + + buswidth = !((setupval & 0x400) >> 10); + } + + memset(lp, 0, sizeof(struct net_local)); + spin_lock_init(&lp->lock); + + printk("(IRQ %d, %s connector, %d-bit bus", dev->irq, + eexp_ifmap[dev->if_port], buswidth?8:16); + + if (!request_region(dev->base_addr + 0x300e, 1, "EtherExpress")) + return -EBUSY; + + eexp_hw_set_interface(dev); + + release_region(dev->base_addr + 0x300e, 1); + + /* Find out how much RAM we have on the card */ + outw(0, dev->base_addr + WRITE_PTR); + for (i = 0; i < 32768; i++) + outw(0, dev->base_addr + DATAPORT); + + for (memory_size = 0; memory_size < 64; memory_size++) + { + outw(memory_size<<10, dev->base_addr + READ_PTR); + if (inw(dev->base_addr+DATAPORT)) + break; + outw(memory_size<<10, dev->base_addr + WRITE_PTR); + outw(memory_size | 0x5000, dev->base_addr+DATAPORT); + outw(memory_size<<10, dev->base_addr + READ_PTR); + if (inw(dev->base_addr+DATAPORT) != (memory_size | 0x5000)) + break; + } + + /* Sort out the number of buffers. We may have 16, 32, 48 or 64k + * of RAM to play with. + */ + lp->num_tx_bufs = 4; + lp->rx_buf_end = 0x3ff6; + switch (memory_size) + { + case 64: + lp->rx_buf_end += 0x4000; + case 48: + lp->num_tx_bufs += 4; + lp->rx_buf_end += 0x4000; + case 32: + lp->rx_buf_end += 0x4000; + case 16: + printk(", %dk RAM)\n", memory_size); + break; + default: + printk(") bad memory size (%dk).\n", memory_size); + return -ENODEV; + break; + } + + lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE); + lp->width = buswidth; + + dev->netdev_ops = &eexp_netdev_ops; + dev->watchdog_timeo = 2*HZ; + + return register_netdev(dev); +} + +/* + * Read a word from the EtherExpress on-board serial EEPROM. + * The EEPROM contains 64 words of 16 bits. + */ +static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr, + unsigned char location) +{ + unsigned short cmd = 0x180|(location&0x7f); + unsigned short rval = 0,wval = EC_CS|i586_RST; + int i; + + outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl); + for (i=0x100 ; i ; i>>=1 ) + { + if (cmd&i) + wval |= EC_Wr; + else + wval &= ~EC_Wr; + + outb(wval,ioaddr+EEPROM_Ctrl); + outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl); + eeprom_delay(); + outb(wval,ioaddr+EEPROM_Ctrl); + eeprom_delay(); + } + wval &= ~EC_Wr; + outb(wval,ioaddr+EEPROM_Ctrl); + for (i=0x8000 ; i ; i>>=1 ) + { + outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl); + eeprom_delay(); + if (inb(ioaddr+EEPROM_Ctrl)&EC_Rd) + rval |= i; + outb(wval,ioaddr+EEPROM_Ctrl); + eeprom_delay(); + } + wval &= ~EC_CS; + outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl); + eeprom_delay(); + outb(wval,ioaddr+EEPROM_Ctrl); + eeprom_delay(); + return rval; +} + +/* + * Reap tx buffers and return last transmit status. + * if ==0 then either: + * a) we're not transmitting anything, so why are we here? + * b) we've died. + * otherwise, Stat_Busy(return) means we've still got some packets + * to transmit, Stat_Done(return) means our buffers should be empty + * again + */ + +static unsigned short eexp_hw_lasttxstat(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + unsigned short tx_block = lp->tx_reap; + unsigned short status; + + if (!netif_queue_stopped(dev) && lp->tx_head==lp->tx_reap) + return 0x0000; + + do + { + outw(tx_block & ~31, dev->base_addr + SM_PTR); + status = inw(dev->base_addr + SHADOW(tx_block)); + if (!Stat_Done(status)) + { + lp->tx_link = tx_block; + return status; + } + else + { + lp->last_tx_restart = 0; + dev->stats.collisions += Stat_NoColl(status); + if (!Stat_OK(status)) + { + char *whatsup = NULL; + dev->stats.tx_errors++; + if (Stat_Abort(status)) + dev->stats.tx_aborted_errors++; + if (Stat_TNoCar(status)) { + whatsup = "aborted, no carrier"; + dev->stats.tx_carrier_errors++; + } + if (Stat_TNoCTS(status)) { + whatsup = "aborted, lost CTS"; + dev->stats.tx_carrier_errors++; + } + if (Stat_TNoDMA(status)) { + whatsup = "FIFO underran"; + dev->stats.tx_fifo_errors++; + } + if (Stat_TXColl(status)) { + whatsup = "aborted, too many collisions"; + dev->stats.tx_aborted_errors++; + } + if (whatsup) + printk(KERN_INFO "%s: transmit %s\n", + dev->name, whatsup); + } + else + dev->stats.tx_packets++; + } + if (tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE)) + lp->tx_reap = tx_block = TX_BUF_START; + else + lp->tx_reap = tx_block += TX_BUF_SIZE; + netif_wake_queue(dev); + } + while (lp->tx_reap != lp->tx_head); + + lp->tx_link = lp->tx_tail + 0x08; + + return status; +} + +/* + * This should never happen. It is called when some higher routine detects + * that the CU has stopped, to try to restart it from the last packet we knew + * we were working on, or the idle loop if we had finished for the time. + */ + +static void eexp_hw_txrestart(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + unsigned short ioaddr = dev->base_addr; + + lp->last_tx_restart = lp->tx_link; + scb_wrcbl(dev, lp->tx_link); + scb_command(dev, SCB_CUstart); + outb(0,ioaddr+SIGNAL_CA); + + { + unsigned short boguscount=50,failcount=5; + while (!scb_status(dev)) + { + if (!--boguscount) + { + if (--failcount) + { + printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name, scb_status(dev), scb_rdcmd(dev)); + scb_wrcbl(dev, lp->tx_link); + scb_command(dev, SCB_CUstart); + outb(0,ioaddr+SIGNAL_CA); + boguscount = 100; + } + else + { + printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name); + eexp_hw_init586(dev); + netif_wake_queue(dev); + return; + } + } + } + } +} + +/* + * Writes down the list of transmit buffers into card memory. Each + * entry consists of an 82586 transmit command, followed by a jump + * pointing to itself. When we want to transmit a packet, we write + * the data into the appropriate transmit buffer and then modify the + * preceding jump to point at the new transmit command. This means that + * the 586 command unit is continuously active. + */ + +static void eexp_hw_txinit(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + unsigned short tx_block = TX_BUF_START; + unsigned short curtbuf; + unsigned short ioaddr = dev->base_addr; + + for ( curtbuf=0 ; curtbuf<lp->num_tx_bufs ; curtbuf++ ) + { + outw(tx_block, ioaddr + WRITE_PTR); + + outw(0x0000, ioaddr + DATAPORT); + outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT); + outw(tx_block+0x08, ioaddr + DATAPORT); + outw(tx_block+0x0e, ioaddr + DATAPORT); + + outw(0x0000, ioaddr + DATAPORT); + outw(0x0000, ioaddr + DATAPORT); + outw(tx_block+0x08, ioaddr + DATAPORT); + + outw(0x8000, ioaddr + DATAPORT); + outw(-1, ioaddr + DATAPORT); + outw(tx_block+0x16, ioaddr + DATAPORT); + outw(0x0000, ioaddr + DATAPORT); + + tx_block += TX_BUF_SIZE; + } + lp->tx_head = TX_BUF_START; + lp->tx_reap = TX_BUF_START; + lp->tx_tail = tx_block - TX_BUF_SIZE; + lp->tx_link = lp->tx_tail + 0x08; + lp->rx_buf_start = tx_block; + +} + +/* + * Write the circular list of receive buffer descriptors to card memory. + * The end of the list isn't marked, which means that the 82586 receive + * unit will loop until buffers become available (this avoids it giving us + * "out of resources" messages). + */ + +static void eexp_hw_rxinit(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + unsigned short rx_block = lp->rx_buf_start; + unsigned short ioaddr = dev->base_addr; + + lp->num_rx_bufs = 0; + lp->rx_first = lp->rx_ptr = rx_block; + do + { + lp->num_rx_bufs++; + + outw(rx_block, ioaddr + WRITE_PTR); + + outw(0, ioaddr + DATAPORT); outw(0, ioaddr+DATAPORT); + outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT); + outw(0xffff, ioaddr+DATAPORT); + + outw(0x0000, ioaddr+DATAPORT); + outw(0xdead, ioaddr+DATAPORT); + outw(0xdead, ioaddr+DATAPORT); + outw(0xdead, ioaddr+DATAPORT); + outw(0xdead, ioaddr+DATAPORT); + outw(0xdead, ioaddr+DATAPORT); + outw(0xdead, ioaddr+DATAPORT); + + outw(0x0000, ioaddr+DATAPORT); + outw(rx_block + RX_BUF_SIZE + 0x16, ioaddr+DATAPORT); + outw(rx_block + 0x20, ioaddr+DATAPORT); + outw(0, ioaddr+DATAPORT); + outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT); + + lp->rx_last = rx_block; + rx_block += RX_BUF_SIZE; + } while (rx_block <= lp->rx_buf_end-RX_BUF_SIZE); + + + /* Make first Rx frame descriptor point to first Rx buffer + descriptor */ + outw(lp->rx_first + 6, ioaddr+WRITE_PTR); + outw(lp->rx_first + 0x16, ioaddr+DATAPORT); + + /* Close Rx frame descriptor ring */ + outw(lp->rx_last + 4, ioaddr+WRITE_PTR); + outw(lp->rx_first, ioaddr+DATAPORT); + + /* Close Rx buffer descriptor ring */ + outw(lp->rx_last + 0x16 + 2, ioaddr+WRITE_PTR); + outw(lp->rx_first + 0x16, ioaddr+DATAPORT); + +} + +/* + * Un-reset the 586, and start the configuration sequence. We don't wait for + * this to finish, but allow the interrupt handler to start the CU and RU for + * us. We can't start the receive/transmission system up before we know that + * the hardware is configured correctly. + */ + +static void eexp_hw_init586(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + unsigned short ioaddr = dev->base_addr; + int i; + +#if NET_DEBUG > 6 + printk("%s: eexp_hw_init586()\n", dev->name); +#endif + + lp->started = 0; + + set_loopback(dev); + + outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ); + + /* Download the startup code */ + outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR); + outw(lp->width?0x0001:0x0000, ioaddr + 0x8006); + outw(0x0000, ioaddr + 0x8008); + outw(0x0000, ioaddr + 0x800a); + outw(0x0000, ioaddr + 0x800c); + outw(0x0000, ioaddr + 0x800e); + + for (i = 0; i < ARRAY_SIZE(start_code) * 2; i+=32) { + int j; + outw(i, ioaddr + SM_PTR); + for (j = 0; j < 16 && (i+j)/2 < ARRAY_SIZE(start_code); j+=2) + outw(start_code[(i+j)/2], + ioaddr+0x4000+j); + for (j = 0; j < 16 && (i+j+16)/2 < ARRAY_SIZE(start_code); j+=2) + outw(start_code[(i+j+16)/2], + ioaddr+0x8000+j); + } + + /* Do we want promiscuous mode or multicast? */ + outw(CONF_PROMISC & ~31, ioaddr+SM_PTR); + i = inw(ioaddr+SHADOW(CONF_PROMISC)); + outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1), + ioaddr+SHADOW(CONF_PROMISC)); + lp->was_promisc = dev->flags & IFF_PROMISC; +#if 0 + eexp_setup_filter(dev); +#endif + + /* Write our hardware address */ + outw(CONF_HWADDR & ~31, ioaddr+SM_PTR); + outw(((unsigned short *)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR)); + outw(((unsigned short *)dev->dev_addr)[1], + ioaddr+SHADOW(CONF_HWADDR+2)); + outw(((unsigned short *)dev->dev_addr)[2], + ioaddr+SHADOW(CONF_HWADDR+4)); + + eexp_hw_txinit(dev); + eexp_hw_rxinit(dev); + + outb(0,ioaddr+EEPROM_Ctrl); + mdelay(5); + + scb_command(dev, 0xf000); + outb(0,ioaddr+SIGNAL_CA); + + outw(0, ioaddr+SM_PTR); + + { + unsigned short rboguscount=50,rfailcount=5; + while (inw(ioaddr+0x4000)) + { + if (!--rboguscount) + { + printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n", + dev->name); + scb_command(dev, 0); + outb(0,ioaddr+SIGNAL_CA); + rboguscount = 100; + if (!--rfailcount) + { + printk(KERN_WARNING "%s: i82586 not responding, giving up.\n", + dev->name); + return; + } + } + } + } + + scb_wrcbl(dev, CONF_LINK); + scb_command(dev, 0xf000|SCB_CUstart); + outb(0,ioaddr+SIGNAL_CA); + + { + unsigned short iboguscount=50,ifailcount=5; + while (!scb_status(dev)) + { + if (!--iboguscount) + { + if (--ifailcount) + { + printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n", + dev->name, scb_status(dev), scb_rdcmd(dev)); + scb_wrcbl(dev, CONF_LINK); + scb_command(dev, 0xf000|SCB_CUstart); + outb(0,ioaddr+SIGNAL_CA); + iboguscount = 100; + } + else + { + printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name); + return; + } + } + } + } + + clear_loopback(dev); + outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ); + + lp->init_time = jiffies; +#if NET_DEBUG > 6 + printk("%s: leaving eexp_hw_init586()\n", dev->name); +#endif +} + +static void eexp_setup_filter(struct net_device *dev) +{ + struct netdev_hw_addr *ha; + unsigned short ioaddr = dev->base_addr; + int count = netdev_mc_count(dev); + int i; + if (count > 8) { + printk(KERN_INFO "%s: too many multicast addresses (%d)\n", + dev->name, count); + count = 8; + } + + outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR); + outw(6*count, ioaddr+SHADOW(CONF_NR_MULTICAST)); + i = 0; + netdev_for_each_mc_addr(ha, dev) { + unsigned short *data = (unsigned short *) ha->addr; + + if (i == count) + break; + outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR); + outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i))); + outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR); + outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2)); + outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR); + outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4)); + i++; + } +} + +/* + * Set or clear the multicast filter for this adaptor. + */ +static void +eexp_set_multicast(struct net_device *dev) +{ + unsigned short ioaddr = dev->base_addr; + struct net_local *lp = netdev_priv(dev); + int kick = 0, i; + if ((dev->flags & IFF_PROMISC) != lp->was_promisc) { + outw(CONF_PROMISC & ~31, ioaddr+SM_PTR); + i = inw(ioaddr+SHADOW(CONF_PROMISC)); + outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1), + ioaddr+SHADOW(CONF_PROMISC)); + lp->was_promisc = dev->flags & IFF_PROMISC; + kick = 1; + } + if (!(dev->flags & IFF_PROMISC)) { + eexp_setup_filter(dev); + if (lp->old_mc_count != netdev_mc_count(dev)) { + kick = 1; + lp->old_mc_count = netdev_mc_count(dev); + } + } + if (kick) { + unsigned long oj; + scb_command(dev, SCB_CUsuspend); + outb(0, ioaddr+SIGNAL_CA); + outb(0, ioaddr+SIGNAL_CA); +#if 0 + printk("%s: waiting for CU to go suspended\n", dev->name); +#endif + oj = jiffies; + while ((SCB_CUstat(scb_status(dev)) == 2) && + (time_before(jiffies, oj + 2000))); + if (SCB_CUstat(scb_status(dev)) == 2) + printk("%s: warning, CU didn't stop\n", dev->name); + lp->started &= ~(STARTED_CU); + scb_wrcbl(dev, CONF_LINK); + scb_command(dev, SCB_CUstart); + outb(0, ioaddr+SIGNAL_CA); + } +} + + +/* + * MODULE stuff + */ + +#ifdef MODULE + +#define EEXP_MAX_CARDS 4 /* max number of cards to support */ + +static struct net_device *dev_eexp[EEXP_MAX_CARDS]; +static int irq[EEXP_MAX_CARDS]; +static int io[EEXP_MAX_CARDS]; + +module_param_array(io, int, NULL, 0); +module_param_array(irq, int, NULL, 0); +MODULE_PARM_DESC(io, "EtherExpress 16 I/O base address(es)"); +MODULE_PARM_DESC(irq, "EtherExpress 16 IRQ number(s)"); +MODULE_LICENSE("GPL"); + + +/* Ideally the user would give us io=, irq= for every card. If any parameters + * are specified, we verify and then use them. If no parameters are given, we + * autoprobe for one card only. + */ +int __init init_module(void) +{ + struct net_device *dev; + int this_dev, found = 0; + + for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) { + dev = alloc_etherdev(sizeof(struct net_local)); + dev->irq = irq[this_dev]; + dev->base_addr = io[this_dev]; + if (io[this_dev] == 0) { + if (this_dev) + break; + printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n"); + } + if (do_express_probe(dev) == 0) { + dev_eexp[this_dev] = dev; + found++; + continue; + } + printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]); + free_netdev(dev); + break; + } + if (found) + return 0; + return -ENXIO; +} + +void __exit cleanup_module(void) +{ + int this_dev; + + for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) { + struct net_device *dev = dev_eexp[this_dev]; + if (dev) { + unregister_netdev(dev); + free_netdev(dev); + } + } +} +#endif + +/* + * Local Variables: + * c-file-style: "linux" + * tab-width: 8 + * End: + */ |