diff options
Diffstat (limited to 'drivers/net/atp.c')
| -rw-r--r-- | drivers/net/atp.c | 145 |
1 files changed, 94 insertions, 51 deletions
diff --git a/drivers/net/atp.c b/drivers/net/atp.c index 19520abf2..1e542fcfd 100644 --- a/drivers/net/atp.c +++ b/drivers/net/atp.c @@ -1,23 +1,30 @@ -/* atp.c: Attached (pocket) ethernet adaptor driver for linux. */ +/* atp.c: Attached (pocket) ethernet adapter driver for linux. */ /* - Written 1993 by Donald Becker. - Copyright 1993 United States Government as represented by the Director, - National Security Agency. This software may only be used and distributed - according to the terms of the GNU Public License as modified by SRC, - incorporated herein by reference. + This is a driver for a commonly OEMed pocket (parallel port) + ethernet adapter. - The author may be reached as becker@super.org or - C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715 + 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:v0.04 2/25/94 Donald Becker (becker@super.org)\n"; + "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 adaptor. This is a common low-cost OEM pocket ethernet - adaptor, sold under many names. + 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 @@ -28,7 +35,7 @@ static char *version = Theory of Operation - The RTL8002 adaptor seems to be built around a custom spin of the SEEQ + 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 @@ -40,7 +47,7 @@ static char *version = 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 adaptor can temporarily lose + 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. @@ -53,7 +60,7 @@ static char *version = 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 adaptor, two in each + (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 @@ -74,7 +81,6 @@ static char *version = interpretations of the device registers. */ -#include <linux/config.h> /* Used only to override default values. */ #include <linux/kernel.h> #include <linux/sched.h> #include <linux/types.h> @@ -97,35 +103,26 @@ static char *version = #include "atp.h" -/* Compatibility definitions for earlier kernel versions. */ -#ifndef HAVE_AUTOIRQ -/* From auto_irq.c, in ioport.h for later versions. */ -extern void autoirq_setup(int waittime); -extern int autoirq_report(int waittime); -/* The map from IRQ number (as passed to the interrupt handler) to - 'struct device'. */ -extern struct device *irq2dev_map[16]; -#endif - -#ifndef HAVE_ALLOC_SKB -#define alloc_skb(size, priority) (struct sk_buff *) kmalloc(size,priority) -#define kfree_skbmem(addr, size) kfree_s(addr,size); -#endif - -#ifndef HAVE_PORTRESERVE -#define check_region(ioaddr, size) 0 -#define snarf_region(ioaddr, size); do ; while (0) -#endif - /* use 0 for production, 1 for verification, >2 for debug */ #ifndef NET_DEBUG -#define NET_DEBUG 4 +#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 <linux/timer.h> +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); @@ -138,7 +135,7 @@ 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 reg_ptr); +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); @@ -146,7 +143,7 @@ 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 adaptor of this type, and return '0' iff one exists. +/* 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 @@ -190,7 +187,7 @@ static int atp_probe1(struct device *dev, short ioaddr) status = read_nibble(ioaddr, CMR1); if ((status & 0x78) != 0x08) { - /* The pocket adaptor probe failed, restore the control register. */ + /* The pocket adapter probe failed, restore the control register. */ outb(saved_ctrl_reg, ioaddr + PAR_CONTROL); return 1; } @@ -216,7 +213,7 @@ static int atp_probe1(struct device *dev, short ioaddr) /* Read the station address PROM. */ get_node_ID(dev); - printk("%s: Pocket adaptor found at %#3x, IRQ %d, SAPROM " + 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]); @@ -238,7 +235,7 @@ static int atp_probe1(struct device *dev, short ioaddr) lp->addr_mode = CMR2h_Normal; } - /* For the ATP adaptor the "if_port" is really the data transfer mode. */ + /* 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; @@ -249,6 +246,12 @@ static int atp_probe1(struct device *dev, short ioaddr) 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; } @@ -261,7 +264,7 @@ static void get_node_ID(struct device *dev) write_reg(ioaddr, CMR2, CMR2_EEPROM); /* Point to the EEPROM control registers. */ - /* Some adaptors have the station address at offset 15 instead of offset + /* 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; @@ -323,7 +326,7 @@ static int net_open(struct device *dev) 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")) { + || request_irq(dev->irq, &net_interrupt, 0, "ATP")) { return -EAGAIN; } @@ -423,7 +426,7 @@ net_send_packet(struct sk_buff *skb, struct device *dev) inb(ioaddr + PAR_CONTROL) & 0x10 ? "network cable problem" : "IRQ conflict"); lp->stats.tx_errors++; - /* Try to restart the adaptor. */ + /* Try to restart the adapter. */ hardware_init(dev); dev->tbusy=0; dev->trans_start = jiffies; @@ -479,9 +482,8 @@ net_send_packet(struct sk_buff *skb, struct device *dev) /* The typical workload of the driver: Handle the network interface interrupts. */ static void -net_interrupt(int reg_ptr) +net_interrupt(int irq, struct pt_regs * regs) { - int irq = pt_regs2irq(reg_ptr); struct device *dev = (struct device *)(irq2dev_map[irq]); struct net_local *lp; int ioaddr, status, boguscount = 20; @@ -499,7 +501,7 @@ net_interrupt(int reg_ptr) /* Disable additional spurious interrupts. */ outb(Ctrl_SelData, ioaddr + PAR_CONTROL); - /* The adaptor's output is currently the IRQ line, switch it to data. */ + /* The adapter's output is currently the IRQ line, switch it to data. */ write_reg(ioaddr, CMR2, CMR2_NULL); write_reg(ioaddr, IMR, 0); @@ -534,7 +536,7 @@ net_interrupt(int reg_ptr) } 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 adaptor. */ + and reinitialize the adapter. */ write_reg(ioaddr, ISR, ISR_TxErr + ISR_TxOK); if (status & (ISR_TxErr<<3)) { lp->stats.collisions++; @@ -576,14 +578,19 @@ net_interrupt(int reg_ptr) } /* This following code fixes a rare (and very difficult to track down) - problem where the adaptor forgets its ethernet address. */ + 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 adaptor that it can go back to using the output line as IRQ. */ + /* 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); @@ -598,6 +605,41 @@ net_interrupt(int reg_ptr) 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) { @@ -648,6 +690,7 @@ static void net_rx(struct device *dev) data[12], data[13]); } + skb->protocol=eth_type_trans(skb,dev); netif_rx(skb); lp->stats.rx_packets++; } @@ -710,7 +753,7 @@ net_get_stats(struct device *dev) return &lp->stats; } -/* Set or clear the multicast filter for this adaptor. +/* 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 |