/* atp.c: Attached (pocket) ethernet adapter driver for linux. */ /* This is a driver for a commonly OEMed pocket (parallel port) ethernet adapter. Written 1993,1994,1995 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 The timer-based reset code was written by Bill Carlson, wwc@super.org. */ static char *version = "atp.c:v1.01 1/18/95 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; /* This file is a device driver for the RealTek (aka AT-Lan-Tec) pocket ethernet adapter. This is a common low-cost OEM pocket ethernet adapter, sold under many names. Sources: This driver was written from the packet driver assembly code provided by Vincent Bono of AT-Lan-Tec. Ever try to figure out how a complicated device works just from the assembly code? It ain't pretty. The following description is written based on guesses and writing lots of special-purpose code to test my theorized operation. Theory of Operation The RTL8002 adapter seems to be built around a custom spin of the SEEQ controller core. It probably has a 16K or 64K internal packet buffer, of which the first 4K is devoted to transmit and the rest to receive. The controller maintains the queue of received packet and the packet buffer access pointer internally, with only 'reset to beginning' and 'skip to next packet' commands visible. The transmit packet queue holds two (or more?) packets: both 'retransmit this packet' (due to collision) and 'transmit next packet' commands must be started by hand. The station address is stored in a standard bit-serial EEPROM which must be read (ughh) by the device driver. (Provisions have been made for substituting a 74S288 PROM, but I haven't gotten reports of any models using it.) Unlike built-in devices, a pocket adapter can temporarily lose power without indication to the device driver. The major effect is that the station address, receive filter (promiscuous, etc.) and transceiver must be reset. The controller itself has 16 registers, some of which use only the lower bits. The registers are read and written 4 bits at a time. The four bit register address is presented on the data lines along with a few additional timing and control bits. The data is then read from status port or written to the data port. Since the bulk data transfer of the actual packets through the slow parallel port dominates the driver's running time, four distinct data (non-register) transfer modes are provided by the adapter, two in each direction. In the first mode timing for the nibble transfers is provided through the data port. In the second mode the same timing is provided through the control port. In either case the data is read from the status port and written to the data port, just as it is accessing registers. In addition to the basic data transfer methods, several more are modes are created by adding some delay by doing multiple reads of the data to allow it to stabilize. This delay seems to be needed on most machines. The data transfer mode is stored in the 'dev->if_port' field. Its default value is '4'. It may be overridden at boot-time using the third parameter to the "ether=..." initialization. The header file provides inline functions that encapsulate the register and data access methods. These functions are hand-tuned to generate reasonable object code. This header file also documents my interpretations of the device registers. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "atp.h" /* use 0 for production, 1 for verification, >2 for debug */ #ifndef NET_DEBUG #define NET_DEBUG 1 #endif static unsigned int net_debug = NET_DEBUG; /* The number of low I/O ports used by the ethercard. */ #define ETHERCARD_TOTAL_SIZE 3 /* This code, written by wwc@super.org, resets the adapter every TIMED_CHECKER ticks. This recovers from an unknown error which hangs the device. */ #define TIMED_CHECKER (HZ/4) #ifdef TIMED_CHECKER #include static void atp_timed_checker(unsigned long ignored); static struct device *atp_timed_dev; static struct timer_list atp_timer = {NULL, NULL, 0, 0, atp_timed_checker}; #endif /* Index to functions, as function prototypes. */ extern int atp_probe(struct device *dev); static int atp_probe1(struct device *dev, short ioaddr); static void get_node_ID(struct device *dev); static unsigned short eeprom_op(short ioaddr, unsigned int cmd); static int net_open(struct device *dev); static void hardware_init(struct device *dev); static void write_packet(short ioaddr, int length, unsigned char *packet, int mode); static void trigger_send(short ioaddr, int length); static int net_send_packet(struct sk_buff *skb, struct device *dev); static void net_interrupt(int irq, struct pt_regs *regs); static void net_rx(struct device *dev); static void read_block(short ioaddr, int length, unsigned char *buffer, int data_mode); static int net_close(struct device *dev); static struct enet_statistics *net_get_stats(struct device *dev); static void set_multicast_list(struct device *dev, int num_addrs, void *addrs); /* Check for a network adapter of this type, and return '0' iff one exists. If dev->base_addr == 0, probe all likely locations. If dev->base_addr == 1, always return failure. If dev->base_addr == 2, allocate space for the device and return success (detachable devices only). */ int atp_init(struct device *dev) { int *port, ports[] = {0x378, 0x278, 0x3bc, 0}; int base_addr = dev->base_addr; if (base_addr > 0x1ff) /* Check a single specified location. */ return atp_probe1(dev, base_addr); else if (base_addr == 1) /* Don't probe at all. */ return ENXIO; for (port = ports; *port; port++) { int ioaddr = *port; outb(0x57, ioaddr + PAR_DATA); if (inb(ioaddr + PAR_DATA) != 0x57) continue; if (atp_probe1(dev, ioaddr) == 0) return 0; } return ENODEV; } static int atp_probe1(struct device *dev, short ioaddr) { int saved_ctrl_reg, status; outb(0xff, ioaddr + PAR_DATA); /* Save the original value of the Control register, in case we guessed wrong. */ saved_ctrl_reg = inb(ioaddr + PAR_CONTROL); /* IRQEN=0, SLCTB=high INITB=high, AUTOFDB=high, STBB=high. */ outb(0x04, ioaddr + PAR_CONTROL); write_reg_high(ioaddr, CMR1, CMR1h_RESET); eeprom_delay(2048); status = read_nibble(ioaddr, CMR1); if ((status & 0x78) != 0x08) { /* The pocket adapter probe failed, restore the control register. */ outb(saved_ctrl_reg, ioaddr + PAR_CONTROL); return 1; } status = read_nibble(ioaddr, CMR2_h); if ((status & 0x78) != 0x10) { outb(saved_ctrl_reg, ioaddr + PAR_CONTROL); return 1; } /* Find the IRQ used by triggering an interrupt. */ write_reg_byte(ioaddr, CMR2, 0x01); /* No accept mode, IRQ out. */ write_reg_high(ioaddr, CMR1, CMR1h_RxENABLE | CMR1h_TxENABLE); /* Enable Tx and Rx. */ /* Omit autoIRQ routine for now. Use "table lookup" instead. Uhgggh. */ if (ioaddr == 0x378) dev->irq = 7; else dev->irq = 5; write_reg_high(ioaddr, CMR1, CMR1h_TxRxOFF); /* Disable Tx and Rx units. */ write_reg(ioaddr, CMR2, CMR2_NULL); dev->base_addr = ioaddr; /* Read the station address PROM. */ get_node_ID(dev); printk("%s: Pocket adapter found at %#3x, IRQ %d, SAPROM " "%02X:%02X:%02X:%02X:%02X:%02X.\n", dev->name, dev->base_addr, dev->irq, dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); /* Leave the hardware in a reset state. */ write_reg_high(ioaddr, CMR1, CMR1h_RESET); if (net_debug) printk(version); /* Initialize the device structure. */ ether_setup(dev); dev->priv = kmalloc(sizeof(struct net_local), GFP_KERNEL); memset(dev->priv, 0, sizeof(struct net_local)); { struct net_local *lp = (struct net_local *)dev->priv; lp->addr_mode = CMR2h_Normal; } /* For the ATP adapter the "if_port" is really the data transfer mode. */ dev->if_port = (dev->mem_start & 0xf) ? dev->mem_start & 0x7 : 4; if (dev->mem_end & 0xf) net_debug = dev->mem_end & 7; dev->open = net_open; dev->stop = net_close; dev->hard_start_xmit = net_send_packet; dev->get_stats = net_get_stats; dev->set_multicast_list = &set_multicast_list; #ifdef TIMED_CHECKER del_timer(&atp_timer); atp_timer.expires = TIMED_CHECKER; atp_timed_dev = dev; add_timer(&atp_timer); #endif return 0; } /* Read the station address PROM, usually a word-wide EEPROM. */ static void get_node_ID(struct device *dev) { short ioaddr = dev->base_addr; int sa_offset = 0; int i; write_reg(ioaddr, CMR2, CMR2_EEPROM); /* Point to the EEPROM control registers. */ /* Some adapters have the station address at offset 15 instead of offset zero. Check for it, and fix it if needed. */ if (eeprom_op(ioaddr, EE_READ(0)) == 0xffff) sa_offset = 15; for (i = 0; i < 3; i++) ((unsigned short *)dev->dev_addr)[i] = ntohs(eeprom_op(ioaddr, EE_READ(sa_offset + i))); write_reg(ioaddr, CMR2, CMR2_NULL); } /* An EEPROM read command starts by shifting out 0x60+address, and then shifting in the serial data. See the NatSemi databook for details. * ________________ * CS : __| * ___ ___ * CLK: ______| |___| | * __ _______ _______ * DI : __X_______X_______X * DO : _________X_______X */ static unsigned short eeprom_op(short ioaddr, unsigned int cmd) { unsigned eedata_out = 0; int num_bits = EE_CMD_SIZE; while (--num_bits >= 0) { char outval = test_bit(num_bits, &cmd) ? EE_DATA_WRITE : 0; write_reg_high(ioaddr, PROM_CMD, outval | EE_CLK_LOW); eeprom_delay(5); write_reg_high(ioaddr, PROM_CMD, outval | EE_CLK_HIGH); eedata_out <<= 1; if (read_nibble(ioaddr, PROM_DATA) & EE_DATA_READ) eedata_out++; eeprom_delay(5); } write_reg_high(ioaddr, PROM_CMD, EE_CLK_LOW & ~EE_CS); return eedata_out; } /* Open/initialize the board. This is called (in the current kernel) sometime after booting when the 'ifconfig' program is run. This routine sets everything up anew at each open, even registers that "should" only need to be set once at boot, so that there is non-reboot way to recover if something goes wrong. This is an attachable device: if there is no dev->priv entry then it wasn't probed for at boot-time, and we need to probe for it again. */ static int net_open(struct device *dev) { /* The interrupt line is turned off (tri-stated) when the device isn't in use. That's especially important for "attached" interfaces where the port or interrupt may be shared. */ if (irq2dev_map[dev->irq] != 0 || (irq2dev_map[dev->irq] = dev) == 0 || request_irq(dev->irq, &net_interrupt, 0, "ATP")) { return -EAGAIN; } hardware_init(dev); dev->start = 1; return 0; } /* This routine resets the hardware. We initialize everything, assuming that the hardware may have been temporarily detached. */ static void hardware_init(struct device *dev) { struct net_local *lp = (struct net_local *)dev->priv; int ioaddr = dev->base_addr; int i; write_reg_high(ioaddr, CMR1, CMR1h_RESET); for (i = 0; i < 6; i++) write_reg_byte(ioaddr, PAR0 + i, dev->dev_addr[i]); write_reg_high(ioaddr, CMR2, lp->addr_mode); if (net_debug > 2) { printk("%s: Reset: current Rx mode %d.\n", dev->name, (read_nibble(ioaddr, CMR2_h) >> 3) & 0x0f); } write_reg(ioaddr, CMR2, CMR2_IRQOUT); write_reg_high(ioaddr, CMR1, CMR1h_RxENABLE | CMR1h_TxENABLE); /* Enable the interrupt line from the serial port. */ outb(Ctrl_SelData + Ctrl_IRQEN, ioaddr + PAR_CONTROL); /* Unmask the interesting interrupts. */ write_reg(ioaddr, IMR, ISR_RxOK | ISR_TxErr | ISR_TxOK); write_reg_high(ioaddr, IMR, ISRh_RxErr); lp->tx_unit_busy = 0; lp->pac_cnt_in_tx_buf = 0; lp->saved_tx_size = 0; dev->tbusy = 0; dev->interrupt = 0; } static void trigger_send(short ioaddr, int length) { write_reg_byte(ioaddr, TxCNT0, length & 0xff); write_reg(ioaddr, TxCNT1, length >> 8); write_reg(ioaddr, CMR1, CMR1_Xmit); } static void write_packet(short ioaddr, int length, unsigned char *packet, int data_mode) { length = (length + 1) & ~1; /* Round up to word length. */ outb(EOC+MAR, ioaddr + PAR_DATA); if ((data_mode & 1) == 0) { /* Write the packet out, starting with the write addr. */ outb(WrAddr+MAR, ioaddr + PAR_DATA); do { write_byte_mode0(ioaddr, *packet++); } while (--length > 0) ; } else { /* Write the packet out in slow mode. */ unsigned char outbyte = *packet++; outb(Ctrl_LNibWrite + Ctrl_IRQEN, ioaddr + PAR_CONTROL); outb(WrAddr+MAR, ioaddr + PAR_DATA); outb((outbyte & 0x0f)|0x40, ioaddr + PAR_DATA); outb(outbyte & 0x0f, ioaddr + PAR_DATA); outbyte >>= 4; outb(outbyte & 0x0f, ioaddr + PAR_DATA); outb(Ctrl_HNibWrite + Ctrl_IRQEN, ioaddr + PAR_CONTROL); while (--length > 0) write_byte_mode1(ioaddr, *packet++); } /* Terminate the Tx frame. End of write: ECB. */ outb(0xff, ioaddr + PAR_DATA); outb(Ctrl_HNibWrite | Ctrl_SelData | Ctrl_IRQEN, ioaddr + PAR_CONTROL); } static int net_send_packet(struct sk_buff *skb, struct device *dev) { struct net_local *lp = (struct net_local *)dev->priv; int ioaddr = dev->base_addr; if (dev->tbusy) { /* If we get here, some higher level has decided we are broken. There should really be a "kick me" function call instead. */ int tickssofar = jiffies - dev->trans_start; if (tickssofar < 5) return 1; printk("%s: transmit timed out, %s?\n", dev->name, inb(ioaddr + PAR_CONTROL) & 0x10 ? "network cable problem" : "IRQ conflict"); lp->stats.tx_errors++; /* Try to restart the adapter. */ hardware_init(dev); dev->tbusy=0; dev->trans_start = jiffies; } /* If some higher layer thinks we've missed an tx-done interrupt we are passed NULL. Caution: dev_tint() handles the cli()/sti() itself. */ if (skb == NULL) { dev_tint(dev); return 0; } /* Block a timer-based transmit from overlapping. This could better be done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */ if (set_bit(0, (void*)&dev->tbusy) != 0) printk("%s: Transmitter access conflict.\n", dev->name); else { short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; unsigned char *buf = skb->data; int flags; /* Disable interrupts by writing 0x00 to the Interrupt Mask Register. This sequence must not be interrupted by an incoming packet. */ save_flags(flags); cli(); write_reg(ioaddr, IMR, 0); write_reg_high(ioaddr, IMR, 0); restore_flags(flags); write_packet(ioaddr, length, buf, dev->if_port); lp->pac_cnt_in_tx_buf++; if (lp->tx_unit_busy == 0) { trigger_send(ioaddr, length); lp->saved_tx_size = 0; /* Redundant */ lp->re_tx = 0; lp->tx_unit_busy = 1; } else lp->saved_tx_size = length; dev->trans_start = jiffies; /* Re-enable the LPT interrupts. */ write_reg(ioaddr, IMR, ISR_RxOK | ISR_TxErr | ISR_TxOK); write_reg_high(ioaddr, IMR, ISRh_RxErr); } dev_kfree_skb (skb, FREE_WRITE); return 0; } /* The typical workload of the driver: Handle the network interface interrupts. */ static void net_interrupt(int irq, struct pt_regs * regs) { struct device *dev = (struct device *)(irq2dev_map[irq]); struct net_local *lp; int ioaddr, status, boguscount = 20; static int num_tx_since_rx = 0; if (dev == NULL) { printk ("ATP_interrupt(): irq %d for unknown device.\n", irq); return; } dev->interrupt = 1; ioaddr = dev->base_addr; lp = (struct net_local *)dev->priv; /* Disable additional spurious interrupts. */ outb(Ctrl_SelData, ioaddr + PAR_CONTROL); /* The adapter's output is currently the IRQ line, switch it to data. */ write_reg(ioaddr, CMR2, CMR2_NULL); write_reg(ioaddr, IMR, 0); if (net_debug > 5) printk("%s: In interrupt ", dev->name); while (--boguscount > 0) { status = read_nibble(ioaddr, ISR); if (net_debug > 5) printk("loop status %02x..", status); if (status & (ISR_RxOK<<3)) { write_reg(ioaddr, ISR, ISR_RxOK); /* Clear the Rx interrupt. */ do { int read_status = read_nibble(ioaddr, CMR1); if (net_debug > 6) printk("handling Rx packet %02x..", read_status); /* We acknowledged the normal Rx interrupt, so if the interrupt is still outstanding we must have a Rx error. */ if (read_status & (CMR1_IRQ << 3)) { /* Overrun. */ lp->stats.rx_over_errors++; /* Set to no-accept mode long enough to remove a packet. */ write_reg_high(ioaddr, CMR2, CMR2h_OFF); net_rx(dev); /* Clear the interrupt and return to normal Rx mode. */ write_reg_high(ioaddr, ISR, ISRh_RxErr); write_reg_high(ioaddr, CMR2, lp->addr_mode); } else if ((read_status & (CMR1_BufEnb << 3)) == 0) { net_rx(dev); dev->last_rx = jiffies; num_tx_since_rx = 0; } else break; } while (--boguscount > 0); } else if (status & ((ISR_TxErr + ISR_TxOK)<<3)) { if (net_debug > 6) printk("handling Tx done.."); /* Clear the Tx interrupt. We should check for too many failures and reinitialize the adapter. */ write_reg(ioaddr, ISR, ISR_TxErr + ISR_TxOK); if (status & (ISR_TxErr<<3)) { lp->stats.collisions++; if (++lp->re_tx > 15) { lp->stats.tx_aborted_errors++; hardware_init(dev); break; } /* Attempt to retransmit. */ if (net_debug > 6) printk("attempting to ReTx"); write_reg(ioaddr, CMR1, CMR1_ReXmit + CMR1_Xmit); } else { /* Finish up the transmit. */ lp->stats.tx_packets++; lp->pac_cnt_in_tx_buf--; if ( lp->saved_tx_size) { trigger_send(ioaddr, lp->saved_tx_size); lp->saved_tx_size = 0; lp->re_tx = 0; } else lp->tx_unit_busy = 0; dev->tbusy = 0; mark_bh(NET_BH); /* Inform upper layers. */ } num_tx_since_rx++; } else if (num_tx_since_rx > 8 && jiffies > dev->last_rx + 100) { if (net_debug > 2) printk("%s: Missed packet? No Rx after %d Tx and %ld jiffies" " status %02x CMR1 %02x.\n", dev->name, num_tx_since_rx, jiffies - dev->last_rx, status, (read_nibble(ioaddr, CMR1) >> 3) & 15); lp->stats.rx_missed_errors++; hardware_init(dev); num_tx_since_rx = 0; break; } else break; } /* This following code fixes a rare (and very difficult to track down) problem where the adapter forgets its ethernet address. */ { int i; for (i = 0; i < 6; i++) write_reg_byte(ioaddr, PAR0 + i, dev->dev_addr[i]); #ifdef TIMED_CHECKER del_timer(&atp_timer); atp_timer.expires = TIMED_CHECKER; add_timer(&atp_timer); #endif } /* Tell the adapter that it can go back to using the output line as IRQ. */ write_reg(ioaddr, CMR2, CMR2_IRQOUT); /* Enable the physical interrupt line, which is sure to be low until.. */ outb(Ctrl_SelData + Ctrl_IRQEN, ioaddr + PAR_CONTROL); /* .. we enable the interrupt sources. */ write_reg(ioaddr, IMR, ISR_RxOK | ISR_TxErr | ISR_TxOK); write_reg_high(ioaddr, IMR, ISRh_RxErr); /* Hmmm, really needed? */ if (net_debug > 5) printk("exiting interrupt.\n"); dev->interrupt = 0; return; } #ifdef TIMED_CHECKER /* This following code fixes a rare (and very difficult to track down) problem where the adapter forgets its ethernet address. */ static void atp_timed_checker(unsigned long ignored) { int i; int ioaddr = atp_timed_dev->base_addr; if (!atp_timed_dev->interrupt) { for (i = 0; i < 6; i++) #if 0 if (read_cmd_byte(ioaddr, PAR0 + i) != atp_timed_dev->dev_addr[i]) { struct net_local *lp = (struct net_local *)atp_timed_dev->priv; write_reg_byte(ioaddr, PAR0 + i, atp_timed_dev->dev_addr[i]); if (i == 2) lp->stats.tx_errors++; else if (i == 3) lp->stats.tx_dropped++; else if (i == 4) lp->stats.collisions++; else lp->stats.rx_errors++; } #else write_reg_byte(ioaddr, PAR0 + i, atp_timed_dev->dev_addr[i]); #endif } del_timer(&atp_timer); atp_timer.expires = TIMED_CHECKER; add_timer(&atp_timer); } #endif /* We have a good packet(s), get it/them out of the buffers. */ static void net_rx(struct device *dev) { struct net_local *lp = (struct net_local *)dev->priv; int ioaddr = dev->base_addr; #ifdef notdef ushort header[4]; #else struct rx_header rx_head; #endif /* Process the received packet. */ outb(EOC+MAR, ioaddr + PAR_DATA); read_block(ioaddr, 8, (unsigned char*)&rx_head, dev->if_port); if (net_debug > 5) printk(" rx_count %04x %04x %04x %04x..", rx_head.pad, rx_head.rx_count, rx_head.rx_status, rx_head.cur_addr); if ((rx_head.rx_status & 0x77) != 0x01) { lp->stats.rx_errors++; /* Ackkk! I don't have any documentation on what the error bits mean! The best I can do is slap the device around a bit. */ if (net_debug > 3) printk("%s: Unknown ATP Rx error %04x.\n", dev->name, rx_head.rx_status); hardware_init(dev); return; } else { /* Malloc up new buffer. */ int pkt_len = (rx_head.rx_count & 0x7ff) - 4; /* The "-4" is omits the FCS (CRC). */ struct sk_buff *skb; skb = alloc_skb(pkt_len, GFP_ATOMIC); if (skb == NULL) { printk("%s: Memory squeeze, dropping packet.\n", dev->name); lp->stats.rx_dropped++; goto done; } skb->len = pkt_len; skb->dev = dev; read_block(ioaddr, pkt_len, skb->data, dev->if_port); if (net_debug > 6) { unsigned char *data = skb->data; printk(" data %02x%02x%02x %02x%02x%02x %02x%02x%02x" "%02x%02x%02x %02x%02x..", data[0], data[1], data[2], data[3], data[4], data[5], data[6], data[7], data[8], data[9], data[10], data[11], data[12], data[13]); } netif_rx(skb); lp->stats.rx_packets++; } done: write_reg(ioaddr, CMR1, CMR1_NextPkt); return; } static void read_block(short ioaddr, int length, unsigned char *p, int data_mode) { if (data_mode <= 3) { /* Mode 0 or 1 */ outb(Ctrl_LNibRead, ioaddr + PAR_CONTROL); outb(length == 8 ? RdAddr | HNib | MAR : RdAddr | MAR, ioaddr + PAR_DATA); if (data_mode <= 1) { /* Mode 0 or 1 */ do *p++ = read_byte_mode0(ioaddr); while (--length > 0); } else /* Mode 2 or 3 */ do *p++ = read_byte_mode2(ioaddr); while (--length > 0); } else if (data_mode <= 5) do *p++ = read_byte_mode4(ioaddr); while (--length > 0); else do *p++ = read_byte_mode6(ioaddr); while (--length > 0); outb(EOC+HNib+MAR, ioaddr + PAR_DATA); outb(Ctrl_SelData, ioaddr + PAR_CONTROL); } /* The inverse routine to net_open(). */ static int net_close(struct device *dev) { struct net_local *lp = (struct net_local *)dev->priv; int ioaddr = dev->base_addr; dev->tbusy = 1; dev->start = 0; /* Flush the Tx and disable Rx here. */ lp->addr_mode = CMR2h_OFF; write_reg_high(ioaddr, CMR2, CMR2h_OFF); /* Free the IRQ line. */ outb(0x00, ioaddr + PAR_CONTROL); free_irq(dev->irq); irq2dev_map[dev->irq] = 0; /* Leave the hardware in a reset state. */ write_reg_high(ioaddr, CMR1, CMR1h_RESET); return 0; } /* Get the current statistics. This may be called with the card open or closed. */ static struct enet_statistics * net_get_stats(struct device *dev) { struct net_local *lp = (struct net_local *)dev->priv; return &lp->stats; } /* Set or clear the multicast filter for this adapter. num_addrs == -1 Promiscuous mode, receive all packets num_addrs == 0 Normal mode, clear multicast list num_addrs > 0 Multicast mode, receive normal and MC packets, and do best-effort filtering. */ static void set_multicast_list(struct device *dev, int num_addrs, void *addrs) { struct net_local *lp = (struct net_local *)dev->priv; short ioaddr = dev->base_addr; lp->addr_mode = num_addrs ? CMR2h_PROMISC : CMR2h_Normal; write_reg_high(ioaddr, CMR2, lp->addr_mode); } /* * Local variables: * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c atp.c" * version-control: t * kept-new-versions: 5 * tab-width: 4 * End: */