+++ /dev/null
-/* atp.c: Attached (pocket) ethernet adapter driver for linux. */
-/*
- This is a driver for commonly OEM pocket (parallel port)
- ethernet adapters based on the Realtek RTL8002 and RTL8012 chips.
-
- Written 1993-2000 by Donald Becker.
-
- This software may be used and distributed according to the terms of
- the GNU General Public License (GPL), incorporated herein by reference.
- Drivers based on or derived from this code fall under the GPL and must
- retain the authorship, copyright and license notice. This file is not
- a complete program and may only be used when the entire operating
- system is licensed under the GPL.
-
- Copyright 1993 United States Government as represented by the Director,
- National Security Agency. Copyright 1994-2000 retained by the original
- author, Donald Becker. The timer-based reset code was supplied in 1995
- by Bill Carlson, wwc@super.org.
-
- The author may be reached as becker@scyld.com, or C/O
- Scyld Computing Corporation
- 410 Severn Ave., Suite 210
- Annapolis MD 21403
-
- Support information and updates available at
- http://www.scyld.com/network/atp.html
-
-
- Modular support/softnet added by Alan Cox.
- _bit abuse fixed up by Alan Cox
-
-*/
-
-static const char version[] =
-"atp.c:v1.09=ac 2002/10/01 Donald Becker <becker@scyld.com>\n";
-
-/* The user-configurable values.
- These may be modified when a driver module is loaded.*/
-
-static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
-#define net_debug debug
-
-/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
-static int max_interrupt_work = 15;
-
-#define NUM_UNITS 2
-/* The standard set of ISA module parameters. */
-static int io[NUM_UNITS];
-static int irq[NUM_UNITS];
-static int xcvr[NUM_UNITS]; /* The data transfer mode. */
-
-/* Operational parameters that are set at compile time. */
-
-/* Time in jiffies before concluding the transmitter is hung. */
-#define TX_TIMEOUT (400*HZ/1000)
-
-/*
- 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.
-
- In 1997 Realtek made available the documentation for the second generation
- RTL8012 chip, which has lead to several driver improvements.
- http://www.realtek.com.tw/
-
- 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.
-
- Correction: the controller has two banks of 16 registers. The second
- bank contains only the multicast filter table (now used) and the EEPROM
- access registers.
-
- 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 <atp.h> 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 <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/in.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/crc32.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/spinlock.h>
-#include <linux/delay.h>
-#include <linux/bitops.h>
-
-#include <asm/io.h>
-#include <asm/dma.h>
-
-#include "atp.h"
-
-MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
-MODULE_DESCRIPTION("RealTek RTL8002/8012 parallel port Ethernet driver");
-MODULE_LICENSE("GPL");
-
-module_param(max_interrupt_work, int, 0);
-module_param(debug, int, 0);
-module_param_hw_array(io, int, ioport, NULL, 0);
-module_param_hw_array(irq, int, irq, NULL, 0);
-module_param_array(xcvr, int, NULL, 0);
-MODULE_PARM_DESC(max_interrupt_work, "ATP maximum events handled per interrupt");
-MODULE_PARM_DESC(debug, "ATP debug level (0-7)");
-MODULE_PARM_DESC(io, "ATP I/O base address(es)");
-MODULE_PARM_DESC(irq, "ATP IRQ number(s)");
-MODULE_PARM_DESC(xcvr, "ATP transceiver(s) (0=internal, 1=external)");
-
-/* The number of low I/O ports used by the ethercard. */
-#define ETHERCARD_TOTAL_SIZE 3
-
-/* Sequence to switch an 8012 from printer mux to ethernet mode. */
-static char mux_8012[] = { 0xff, 0xf7, 0xff, 0xfb, 0xf3, 0xfb, 0xff, 0xf7,};
-
-struct net_local {
- spinlock_t lock;
- struct net_device *next_module;
- struct timer_list timer; /* Media selection timer. */
- struct net_device *dev; /* Timer dev. */
- unsigned long last_rx_time; /* Last Rx, in jiffies, to handle Rx hang. */
- int saved_tx_size;
- unsigned int tx_unit_busy:1;
- unsigned char re_tx, /* Number of packet retransmissions. */
- addr_mode, /* Current Rx filter e.g. promiscuous, etc. */
- pac_cnt_in_tx_buf;
-};
-
-/* 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(struct timer_list *t);
-#endif
-
-/* Index to functions, as function prototypes. */
-
-static int atp_probe1(long ioaddr);
-static void get_node_ID(struct net_device *dev);
-static unsigned short eeprom_op(long ioaddr, unsigned int cmd);
-static int net_open(struct net_device *dev);
-static void hardware_init(struct net_device *dev);
-static void write_packet(long ioaddr, int length, unsigned char *packet, int pad, int mode);
-static void trigger_send(long ioaddr, int length);
-static netdev_tx_t atp_send_packet(struct sk_buff *skb,
- struct net_device *dev);
-static irqreturn_t atp_interrupt(int irq, void *dev_id);
-static void net_rx(struct net_device *dev);
-static void read_block(long ioaddr, int length, unsigned char *buffer, int data_mode);
-static int net_close(struct net_device *dev);
-static void set_rx_mode(struct net_device *dev);
-static void tx_timeout(struct net_device *dev, unsigned int txqueue);
-
-
-/* A list of all installed ATP devices, for removing the driver module. */
-static struct net_device *root_atp_dev;
-
-/* 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).
-
- FIXME: we should use the parport layer for this
- */
-static int __init atp_init(void)
-{
- int *port, ports[] = {0x378, 0x278, 0x3bc, 0};
- int base_addr = io[0];
-
- if (base_addr > 0x1ff) /* Check a single specified location. */
- return atp_probe1(base_addr);
- else if (base_addr == 1) /* Don't probe at all. */
- return -ENXIO;
-
- for (port = ports; *port; port++) {
- long ioaddr = *port;
- outb(0x57, ioaddr + PAR_DATA);
- if (inb(ioaddr + PAR_DATA) != 0x57)
- continue;
- if (atp_probe1(ioaddr) == 0)
- return 0;
- }
-
- return -ENODEV;
-}
-
-static const struct net_device_ops atp_netdev_ops = {
- .ndo_open = net_open,
- .ndo_stop = net_close,
- .ndo_start_xmit = atp_send_packet,
- .ndo_set_rx_mode = set_rx_mode,
- .ndo_tx_timeout = tx_timeout,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static int __init atp_probe1(long ioaddr)
-{
- struct net_device *dev = NULL;
- struct net_local *lp;
- int saved_ctrl_reg, status, i;
- int res;
-
- 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);
- if (net_debug > 3)
- printk("atp: Control register was %#2.2x.\n", saved_ctrl_reg);
- /* IRQEN=0, SLCTB=high INITB=high, AUTOFDB=high, STBB=high. */
- outb(0x04, ioaddr + PAR_CONTROL);
-#ifndef final_version
- if (net_debug > 3) {
- /* Turn off the printer multiplexer on the 8012. */
- for (i = 0; i < 8; i++)
- outb(mux_8012[i], ioaddr + PAR_DATA);
- write_reg(ioaddr, MODSEL, 0x00);
- printk("atp: Registers are ");
- for (i = 0; i < 32; i++)
- printk(" %2.2x", read_nibble(ioaddr, i));
- printk(".\n");
- }
-#endif
- /* Turn off the printer multiplexer on the 8012. */
- for (i = 0; i < 8; i++)
- outb(mux_8012[i], ioaddr + PAR_DATA);
- write_reg_high(ioaddr, CMR1, CMR1h_RESET);
- /* udelay() here? */
- status = read_nibble(ioaddr, CMR1);
-
- if (net_debug > 3) {
- printk(KERN_DEBUG "atp: Status nibble was %#2.2x..", status);
- for (i = 0; i < 32; i++)
- printk(" %2.2x", read_nibble(ioaddr, i));
- printk("\n");
- }
-
- if ((status & 0x78) != 0x08) {
- /* The pocket adapter probe failed, restore the control register. */
- outb(saved_ctrl_reg, ioaddr + PAR_CONTROL);
- return -ENODEV;
- }
- status = read_nibble(ioaddr, CMR2_h);
- if ((status & 0x78) != 0x10) {
- outb(saved_ctrl_reg, ioaddr + PAR_CONTROL);
- return -ENODEV;
- }
-
- dev = alloc_etherdev(sizeof(struct net_local));
- if (!dev)
- return -ENOMEM;
-
- /* 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 (irq[0])
- dev->irq = irq[0];
- else 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);
-
-#ifndef MODULE
- if (net_debug)
- printk(KERN_INFO "%s", version);
-#endif
-
- printk(KERN_NOTICE "%s: Pocket adapter found at %#3lx, IRQ %d, "
- "SAPROM %pM.\n",
- dev->name, dev->base_addr, dev->irq, dev->dev_addr);
-
- /* Reset the ethernet hardware and activate the printer pass-through. */
- write_reg_high(ioaddr, CMR1, CMR1h_RESET | CMR1h_MUX);
-
- lp = netdev_priv(dev);
- lp->addr_mode = CMR2h_Normal;
- spin_lock_init(&lp->lock);
-
- /* For the ATP adapter the "if_port" is really the data transfer mode. */
- if (xcvr[0])
- dev->if_port = xcvr[0];
- else
- dev->if_port = (dev->mem_start & 0xf) ? (dev->mem_start & 0x7) : 4;
- if (dev->mem_end & 0xf)
- net_debug = dev->mem_end & 7;
-
- dev->netdev_ops = &atp_netdev_ops;
- dev->watchdog_timeo = TX_TIMEOUT;
-
- res = register_netdev(dev);
- if (res) {
- free_netdev(dev);
- return res;
- }
-
- lp->next_module = root_atp_dev;
- root_atp_dev = dev;
-
- return 0;
-}
-
-/* Read the station address PROM, usually a word-wide EEPROM. */
-static void __init get_node_ID(struct net_device *dev)
-{
- long ioaddr = dev->base_addr;
- __be16 addr[ETH_ALEN / 2];
- 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++)
- addr[i] =
- cpu_to_be16(eeprom_op(ioaddr, EE_READ(sa_offset + i)));
- eth_hw_addr_set(dev, (u8 *)addr);
-
- 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 __init eeprom_op(long ioaddr, u32 cmd)
-{
- unsigned eedata_out = 0;
- int num_bits = EE_CMD_SIZE;
-
- while (--num_bits >= 0) {
- char outval = (cmd & (1<<num_bits)) ? EE_DATA_WRITE : 0;
- write_reg_high(ioaddr, PROM_CMD, outval | EE_CLK_LOW);
- write_reg_high(ioaddr, PROM_CMD, outval | EE_CLK_HIGH);
- eedata_out <<= 1;
- if (read_nibble(ioaddr, PROM_DATA) & EE_DATA_READ)
- eedata_out++;
- }
- 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 private entry then it wasn't
- probed for at boot-time, and we need to probe for it again.
- */
-static int net_open(struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- int ret;
-
- /* 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. */
- ret = request_irq(dev->irq, atp_interrupt, 0, dev->name, dev);
- if (ret)
- return ret;
-
- hardware_init(dev);
-
- lp->dev = dev;
- timer_setup(&lp->timer, atp_timed_checker, 0);
- lp->timer.expires = jiffies + TIMED_CHECKER;
- add_timer(&lp->timer);
-
- netif_start_queue(dev);
- return 0;
-}
-
-/* This routine resets the hardware. We initialize everything, assuming that
- the hardware may have been temporarily detached. */
-static void hardware_init(struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- long ioaddr = dev->base_addr;
- int i;
-
- /* Turn off the printer multiplexer on the 8012. */
- for (i = 0; i < 8; i++)
- outb(mux_8012[i], ioaddr + PAR_DATA);
- 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(KERN_DEBUG "%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;
-}
-
-static void trigger_send(long 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(long ioaddr, int length, unsigned char *packet, int pad_len, int data_mode)
-{
- if (length & 1)
- {
- length++;
- pad_len++;
- }
-
- 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 > pad_len) ;
- do {
- write_byte_mode0(ioaddr, 0);
- } 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 > pad_len)
- write_byte_mode1(ioaddr, *packet++);
- while (--length > 0)
- write_byte_mode1(ioaddr, 0);
- }
- /* Terminate the Tx frame. End of write: ECB. */
- outb(0xff, ioaddr + PAR_DATA);
- outb(Ctrl_HNibWrite | Ctrl_SelData | Ctrl_IRQEN, ioaddr + PAR_CONTROL);
-}
-
-static void tx_timeout(struct net_device *dev, unsigned int txqueue)
-{
- long ioaddr = dev->base_addr;
-
- printk(KERN_WARNING "%s: Transmit timed out, %s?\n", dev->name,
- inb(ioaddr + PAR_CONTROL) & 0x10 ? "network cable problem"
- : "IRQ conflict");
- dev->stats.tx_errors++;
- /* Try to restart the adapter. */
- hardware_init(dev);
- netif_trans_update(dev); /* prevent tx timeout */
- netif_wake_queue(dev);
- dev->stats.tx_errors++;
-}
-
-static netdev_tx_t atp_send_packet(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- long ioaddr = dev->base_addr;
- int length;
- unsigned long flags;
-
- length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
-
- netif_stop_queue(dev);
-
- /* Disable interrupts by writing 0x00 to the Interrupt Mask Register.
- This sequence must not be interrupted by an incoming packet. */
-
- spin_lock_irqsave(&lp->lock, flags);
- write_reg(ioaddr, IMR, 0);
- write_reg_high(ioaddr, IMR, 0);
- spin_unlock_irqrestore(&lp->lock, flags);
-
- write_packet(ioaddr, length, skb->data, length-skb->len, 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;
- /* 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);
- return NETDEV_TX_OK;
-}
-
-
-/* The typical workload of the driver:
- Handle the network interface interrupts. */
-static irqreturn_t atp_interrupt(int irq, void *dev_instance)
-{
- struct net_device *dev = dev_instance;
- struct net_local *lp;
- long ioaddr;
- static int num_tx_since_rx;
- int boguscount = max_interrupt_work;
- int handled = 0;
-
- ioaddr = dev->base_addr;
- lp = netdev_priv(dev);
-
- spin_lock(&lp->lock);
-
- /* 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(KERN_DEBUG "%s: In interrupt ", dev->name);
- while (--boguscount > 0) {
- int status = read_nibble(ioaddr, ISR);
- if (net_debug > 5)
- printk("loop status %02x..", status);
-
- if (status & (ISR_RxOK<<3)) {
- handled = 1;
- 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. */
- dev->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);
- num_tx_since_rx = 0;
- } else
- break;
- } while (--boguscount > 0);
- } else if (status & ((ISR_TxErr + ISR_TxOK)<<3)) {
- handled = 1;
- 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)) {
- dev->stats.collisions++;
- if (++lp->re_tx > 15) {
- dev->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. */
- dev->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;
- netif_wake_queue(dev); /* Inform upper layers. */
- }
- num_tx_since_rx++;
- } else if (num_tx_since_rx > 8 &&
- time_after(jiffies, lp->last_rx_time + HZ)) {
- if (net_debug > 2)
- printk(KERN_DEBUG "%s: Missed packet? No Rx after %d Tx and "
- "%ld jiffies status %02x CMR1 %02x.\n", dev->name,
- num_tx_since_rx, jiffies - lp->last_rx_time, status,
- (read_nibble(ioaddr, CMR1) >> 3) & 15);
- dev->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]);
-#if 0 && defined(TIMED_CHECKER)
- mod_timer(&lp->timer, jiffies + TIMED_CHECKER);
-#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? */
-
- spin_unlock(&lp->lock);
-
- if (net_debug > 5) printk("exiting interrupt.\n");
- return IRQ_RETVAL(handled);
-}
-
-#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(struct timer_list *t)
-{
- struct net_local *lp = timer_container_of(lp, t, timer);
- struct net_device *dev = lp->dev;
- long ioaddr = dev->base_addr;
- int tickssofar = jiffies - lp->last_rx_time;
- int i;
-
- spin_lock(&lp->lock);
- if (tickssofar > 2*HZ) {
-#if 1
- for (i = 0; i < 6; i++)
- write_reg_byte(ioaddr, PAR0 + i, dev->dev_addr[i]);
- lp->last_rx_time = jiffies;
-#else
- for (i = 0; i < 6; i++)
- if (read_cmd_byte(ioaddr, PAR0 + i) != atp_timed_dev->dev_addr[i])
- {
- struct net_local *lp = netdev_priv(atp_timed_dev);
- write_reg_byte(ioaddr, PAR0 + i, atp_timed_dev->dev_addr[i]);
- if (i == 2)
- dev->stats.tx_errors++;
- else if (i == 3)
- dev->stats.tx_dropped++;
- else if (i == 4)
- dev->stats.collisions++;
- else
- dev->stats.rx_errors++;
- }
-#endif
- }
- spin_unlock(&lp->lock);
- lp->timer.expires = jiffies + TIMED_CHECKER;
- add_timer(&lp->timer);
-}
-#endif
-
-/* We have a good packet(s), get it/them out of the buffers. */
-static void net_rx(struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- long ioaddr = dev->base_addr;
- struct rx_header rx_head;
-
- /* 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(KERN_DEBUG " 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) {
- dev->stats.rx_errors++;
- if (rx_head.rx_status & 0x0004) dev->stats.rx_frame_errors++;
- else if (rx_head.rx_status & 0x0002) dev->stats.rx_crc_errors++;
- if (net_debug > 3)
- printk(KERN_DEBUG "%s: Unknown ATP Rx error %04x.\n",
- dev->name, rx_head.rx_status);
- if (rx_head.rx_status & 0x0020) {
- dev->stats.rx_fifo_errors++;
- write_reg_high(ioaddr, CMR1, CMR1h_TxENABLE);
- write_reg_high(ioaddr, CMR1, CMR1h_RxENABLE | CMR1h_TxENABLE);
- } else if (rx_head.rx_status & 0x0050)
- hardware_init(dev);
- return;
- } else {
- /* Malloc up new buffer. The "-4" omits the FCS (CRC). */
- int pkt_len = (rx_head.rx_count & 0x7ff) - 4;
- struct sk_buff *skb;
-
- skb = netdev_alloc_skb(dev, pkt_len + 2);
- if (skb == NULL) {
- dev->stats.rx_dropped++;
- goto done;
- }
-
- skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
- read_block(ioaddr, pkt_len, skb_put(skb,pkt_len), dev->if_port);
- skb->protocol = eth_type_trans(skb, dev);
- netif_rx(skb);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += pkt_len;
- }
- done:
- write_reg(ioaddr, CMR1, CMR1_NextPkt);
- lp->last_rx_time = jiffies;
-}
-
-static void read_block(long 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 net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- long ioaddr = dev->base_addr;
-
- netif_stop_queue(dev);
-
- timer_delete_sync(&lp->timer);
-
- /* 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, dev);
-
- /* Reset the ethernet hardware and activate the printer pass-through. */
- write_reg_high(ioaddr, CMR1, CMR1h_RESET | CMR1h_MUX);
- return 0;
-}
-
-/*
- * Set or clear the multicast filter for this adapter.
- */
-
-static void set_rx_mode(struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- long ioaddr = dev->base_addr;
-
- if (!netdev_mc_empty(dev) || (dev->flags & (IFF_ALLMULTI|IFF_PROMISC)))
- lp->addr_mode = CMR2h_PROMISC;
- else
- lp->addr_mode = CMR2h_Normal;
- write_reg_high(ioaddr, CMR2, lp->addr_mode);
-}
-
-static int __init atp_init_module(void) {
- if (debug) /* Emit version even if no cards detected. */
- printk(KERN_INFO "%s", version);
- return atp_init();
-}
-
-static void __exit atp_cleanup_module(void) {
- struct net_device *next_dev;
-
- while (root_atp_dev) {
- struct net_local *atp_local = netdev_priv(root_atp_dev);
- next_dev = atp_local->next_module;
- unregister_netdev(root_atp_dev);
- /* No need to release_region(), since we never snarf it. */
- free_netdev(root_atp_dev);
- root_atp_dev = next_dev;
- }
-}
-
-module_init(atp_init_module);
-module_exit(atp_cleanup_module);
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-/* Linux header file for the ATP pocket ethernet adapter. */
-/* v1.09 8/9/2000 becker@scyld.com. */
-
-#include <linux/if_ether.h>
-#include <linux/types.h>
-
-/* The header prepended to received packets. */
-struct rx_header {
- ushort pad; /* Pad. */
- ushort rx_count;
- ushort rx_status; /* Unknown bit assignments :-<. */
- ushort cur_addr; /* Apparently the current buffer address(?) */
-};
-
-#define PAR_DATA 0
-#define PAR_STATUS 1
-#define PAR_CONTROL 2
-
-#define Ctrl_LNibRead 0x08 /* LP_PSELECP */
-#define Ctrl_HNibRead 0
-#define Ctrl_LNibWrite 0x08 /* LP_PSELECP */
-#define Ctrl_HNibWrite 0
-#define Ctrl_SelData 0x04 /* LP_PINITP */
-#define Ctrl_IRQEN 0x10 /* LP_PINTEN */
-
-#define EOW 0xE0
-#define EOC 0xE0
-#define WrAddr 0x40 /* Set address of EPLC read, write register. */
-#define RdAddr 0xC0
-#define HNib 0x10
-
-enum page0_regs {
- /* The first six registers hold
- * the ethernet physical station address.
- */
- PAR0 = 0, PAR1 = 1, PAR2 = 2, PAR3 = 3, PAR4 = 4, PAR5 = 5,
- TxCNT0 = 6, TxCNT1 = 7, /* The transmit byte count. */
- TxSTAT = 8, RxSTAT = 9, /* Tx and Rx status. */
- ISR = 10, IMR = 11, /* Interrupt status and mask. */
- CMR1 = 12, /* Command register 1. */
- CMR2 = 13, /* Command register 2. */
- MODSEL = 14, /* Mode select register. */
- MAR = 14, /* Memory address register (?). */
- CMR2_h = 0x1d,
-};
-
-enum eepage_regs {
- PROM_CMD = 6,
- PROM_DATA = 7 /* Note that PROM_CMD is in the "high" bits. */
-};
-
-#define ISR_TxOK 0x01
-#define ISR_RxOK 0x04
-#define ISR_TxErr 0x02
-#define ISRh_RxErr 0x11 /* ISR, high nibble */
-
-#define CMR1h_MUX 0x08 /* Select printer multiplexor on 8012. */
-#define CMR1h_RESET 0x04 /* Reset. */
-#define CMR1h_RxENABLE 0x02 /* Rx unit enable. */
-#define CMR1h_TxENABLE 0x01 /* Tx unit enable. */
-#define CMR1h_TxRxOFF 0x00
-#define CMR1_ReXmit 0x08 /* Trigger a retransmit. */
-#define CMR1_Xmit 0x04 /* Trigger a transmit. */
-#define CMR1_IRQ 0x02 /* Interrupt active. */
-#define CMR1_BufEnb 0x01 /* Enable the buffer(?). */
-#define CMR1_NextPkt 0x01 /* Enable the buffer(?). */
-
-#define CMR2_NULL 8
-#define CMR2_IRQOUT 9
-#define CMR2_RAMTEST 10
-#define CMR2_EEPROM 12 /* Set to page 1, for reading the EEPROM. */
-
-#define CMR2h_OFF 0 /* No accept mode. */
-#define CMR2h_Physical 1 /* Accept a physical address match only. */
-#define CMR2h_Normal 2 /* Accept physical and broadcast address. */
-#define CMR2h_PROMISC 3 /* Promiscuous mode. */
-
-/* An inline function used below: it differs from inb() by explicitly
- * return an unsigned char, saving a truncation.
- */
-static inline unsigned char inbyte(unsigned short port)
-{
- unsigned char _v;
-
- __asm__ __volatile__ ("inb %w1,%b0" : "=a" (_v) : "d" (port));
- return _v;
-}
-
-/* Read register OFFSET.
- * This command should always be terminated with read_end().
- */
-static inline unsigned char read_nibble(short port, unsigned char offset)
-{
- unsigned char retval;
-
- outb(EOC+offset, port + PAR_DATA);
- outb(RdAddr+offset, port + PAR_DATA);
- inbyte(port + PAR_STATUS); /* Settling time delay */
- retval = inbyte(port + PAR_STATUS);
- outb(EOC+offset, port + PAR_DATA);
-
- return retval;
-}
-
-/* Functions for bulk data read. The interrupt line is always disabled. */
-/* Get a byte using read mode 0, reading data from the control lines. */
-static inline unsigned char read_byte_mode0(short ioaddr)
-{
- unsigned char low_nib;
-
- outb(Ctrl_LNibRead, ioaddr + PAR_CONTROL);
- inbyte(ioaddr + PAR_STATUS);
- low_nib = (inbyte(ioaddr + PAR_STATUS) >> 3) & 0x0f;
- outb(Ctrl_HNibRead, ioaddr + PAR_CONTROL);
- inbyte(ioaddr + PAR_STATUS); /* Settling time delay -- needed! */
- inbyte(ioaddr + PAR_STATUS); /* Settling time delay -- needed! */
- return low_nib | ((inbyte(ioaddr + PAR_STATUS) << 1) & 0xf0);
-}
-
-/* The same as read_byte_mode0(), but does multiple inb()s for stability. */
-static inline unsigned char read_byte_mode2(short ioaddr)
-{
- unsigned char low_nib;
-
- outb(Ctrl_LNibRead, ioaddr + PAR_CONTROL);
- inbyte(ioaddr + PAR_STATUS);
- low_nib = (inbyte(ioaddr + PAR_STATUS) >> 3) & 0x0f;
- outb(Ctrl_HNibRead, ioaddr + PAR_CONTROL);
- inbyte(ioaddr + PAR_STATUS); /* Settling time delay -- needed! */
- return low_nib | ((inbyte(ioaddr + PAR_STATUS) << 1) & 0xf0);
-}
-
-/* Read a byte through the data register. */
-static inline unsigned char read_byte_mode4(short ioaddr)
-{
- unsigned char low_nib;
-
- outb(RdAddr | MAR, ioaddr + PAR_DATA);
- low_nib = (inbyte(ioaddr + PAR_STATUS) >> 3) & 0x0f;
- outb(RdAddr | HNib | MAR, ioaddr + PAR_DATA);
- return low_nib | ((inbyte(ioaddr + PAR_STATUS) << 1) & 0xf0);
-}
-
-/* Read a byte through the data register, double reading to allow settling. */
-static inline unsigned char read_byte_mode6(short ioaddr)
-{
- unsigned char low_nib;
-
- outb(RdAddr | MAR, ioaddr + PAR_DATA);
- inbyte(ioaddr + PAR_STATUS);
- low_nib = (inbyte(ioaddr + PAR_STATUS) >> 3) & 0x0f;
- outb(RdAddr | HNib | MAR, ioaddr + PAR_DATA);
- inbyte(ioaddr + PAR_STATUS);
- return low_nib | ((inbyte(ioaddr + PAR_STATUS) << 1) & 0xf0);
-}
-
-static inline void
-write_reg(short port, unsigned char reg, unsigned char value)
-{
- unsigned char outval;
-
- outb(EOC | reg, port + PAR_DATA);
- outval = WrAddr | reg;
- outb(outval, port + PAR_DATA);
- outb(outval, port + PAR_DATA); /* Double write for PS/2. */
-
- outval &= 0xf0;
- outval |= value;
- outb(outval, port + PAR_DATA);
- outval &= 0x1f;
- outb(outval, port + PAR_DATA);
- outb(outval, port + PAR_DATA);
-
- outb(EOC | outval, port + PAR_DATA);
-}
-
-static inline void
-write_reg_high(short port, unsigned char reg, unsigned char value)
-{
- unsigned char outval = EOC | HNib | reg;
-
- outb(outval, port + PAR_DATA);
- outval &= WrAddr | HNib | 0x0f;
- outb(outval, port + PAR_DATA);
- outb(outval, port + PAR_DATA); /* Double write for PS/2. */
-
- outval = WrAddr | HNib | value;
- outb(outval, port + PAR_DATA);
- outval &= HNib | 0x0f; /* HNib | value */
- outb(outval, port + PAR_DATA);
- outb(outval, port + PAR_DATA);
-
- outb(EOC | HNib | outval, port + PAR_DATA);
-}
-
-/* Write a byte out using nibble mode. The low nibble is written first. */
-static inline void
-write_reg_byte(short port, unsigned char reg, unsigned char value)
-{
- unsigned char outval;
-
- outb(EOC | reg, port + PAR_DATA); /* Reset the address register. */
- outval = WrAddr | reg;
- outb(outval, port + PAR_DATA);
- outb(outval, port + PAR_DATA); /* Double write for PS/2. */
-
- outb((outval & 0xf0) | (value & 0x0f), port + PAR_DATA);
- outb(value & 0x0f, port + PAR_DATA);
- value >>= 4;
- outb(value, port + PAR_DATA);
- outb(0x10 | value, port + PAR_DATA);
- outb(0x10 | value, port + PAR_DATA);
-
- outb(EOC | value, port + PAR_DATA); /* Reset the address register. */
-}
-
-/* Bulk data writes to the packet buffer. The interrupt line remains enabled.
- * The first, faster method uses only the dataport (data modes 0, 2 & 4).
- * The second (backup) method uses data and control regs (modes 1, 3 & 5).
- * It should only be needed when there is skew between the individual data
- * lines.
- */
-static inline void write_byte_mode0(short ioaddr, unsigned char value)
-{
- outb(value & 0x0f, ioaddr + PAR_DATA);
- outb((value>>4) | 0x10, ioaddr + PAR_DATA);
-}
-
-static inline void write_byte_mode1(short ioaddr, unsigned char value)
-{
- outb(value & 0x0f, ioaddr + PAR_DATA);
- outb(Ctrl_IRQEN | Ctrl_LNibWrite, ioaddr + PAR_CONTROL);
- outb((value>>4) | 0x10, ioaddr + PAR_DATA);
- outb(Ctrl_IRQEN | Ctrl_HNibWrite, ioaddr + PAR_CONTROL);
-}
-
-/* Write 16bit VALUE to the packet buffer: the same as above just doubled. */
-static inline void write_word_mode0(short ioaddr, unsigned short value)
-{
- outb(value & 0x0f, ioaddr + PAR_DATA);
- value >>= 4;
- outb((value & 0x0f) | 0x10, ioaddr + PAR_DATA);
- value >>= 4;
- outb(value & 0x0f, ioaddr + PAR_DATA);
- value >>= 4;
- outb((value & 0x0f) | 0x10, ioaddr + PAR_DATA);
-}
-
-/* EEPROM_Ctrl bits. */
-#define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
-#define EE_CS 0x02 /* EEPROM chip select. */
-#define EE_CLK_HIGH 0x12
-#define EE_CLK_LOW 0x16
-#define EE_DATA_WRITE 0x01 /* EEPROM chip data in. */
-#define EE_DATA_READ 0x08 /* EEPROM chip data out. */
-
-/* The EEPROM commands include the alway-set leading bit. */
-#define EE_WRITE_CMD(offset) (((5 << 6) + (offset)) << 17)
-#define EE_READ(offset) (((6 << 6) + (offset)) << 17)
-#define EE_ERASE(offset) (((7 << 6) + (offset)) << 17)
-#define EE_CMD_SIZE 27 /* The command+address+data size. */
projects / thirdparty / kernel / linux.git / commitdiff
