diff options
Diffstat (limited to 'drivers/net/atp.c')
| -rw-r--r-- | drivers/net/atp.c | 940 |
1 files changed, 0 insertions, 940 deletions
diff --git a/drivers/net/atp.c b/drivers/net/atp.c deleted file mode 100644 index f3459798b0e9..000000000000 --- a/drivers/net/atp.c +++ /dev/null @@ -1,940 +0,0 @@ -/* 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/system.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_array(io, int, NULL, 0); -module_param_array(irq, int, 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. */ - 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, - chip_type; -}; - -/* 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); -#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); - - -/* 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_multicast_list = set_rx_mode, - .ndo_tx_timeout = tx_timeout, - .ndo_change_mtu = eth_change_mtu, - .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->chip_type = RTL8002; - 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; - 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++) - ((__be16 *)dev->dev_addr)[i] = - cpu_to_be16(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 __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); - - init_timer(&lp->timer); - lp->timer.expires = jiffies + TIMED_CHECKER; - lp->timer.data = (unsigned long)dev; - lp->timer.function = atp_timed_checker; /* timer handler */ - 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) -{ - 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); - dev->trans_start = jiffies; /* 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, dev->last_rx + 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 - dev->last_rx, 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(unsigned long data) -{ - struct net_device *dev = (struct net_device *)data; - long ioaddr = dev->base_addr; - struct net_local *lp = netdev_priv(dev); - 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 = dev_alloc_skb(pkt_len + 2); - if (skb == NULL) { - printk(KERN_ERR "%s: Memory squeeze, dropping packet.\n", - dev->name); - 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->last_rx = jiffies; - 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); - - del_timer_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_8002(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 void set_rx_mode_8012(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - long ioaddr = dev->base_addr; - unsigned char new_mode, mc_filter[8]; /* Multicast hash filter */ - int i; - - if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ - new_mode = CMR2h_PROMISC; - } else if ((netdev_mc_count(dev) > 1000) || - (dev->flags & IFF_ALLMULTI)) { - /* Too many to filter perfectly -- accept all multicasts. */ - memset(mc_filter, 0xff, sizeof(mc_filter)); - new_mode = CMR2h_Normal; - } else { - struct netdev_hw_addr *ha; - - memset(mc_filter, 0, sizeof(mc_filter)); - netdev_for_each_mc_addr(ha, dev) { - int filterbit = ether_crc_le(ETH_ALEN, ha->addr) & 0x3f; - mc_filter[filterbit >> 5] |= 1 << (filterbit & 31); - } - new_mode = CMR2h_Normal; - } - lp->addr_mode = new_mode; - write_reg(ioaddr, CMR2, CMR2_IRQOUT | 0x04); /* Switch to page 1. */ - for (i = 0; i < 8; i++) - write_reg_byte(ioaddr, i, mc_filter[i]); - if (net_debug > 2 || 1) { - lp->addr_mode = 1; - printk(KERN_DEBUG "%s: Mode %d, setting multicast filter to", - dev->name, lp->addr_mode); - for (i = 0; i < 8; i++) - printk(" %2.2x", mc_filter[i]); - printk(".\n"); - } - - write_reg_high(ioaddr, CMR2, lp->addr_mode); - write_reg(ioaddr, CMR2, CMR2_IRQOUT); /* Switch back to page 0 */ -} - -static void set_rx_mode(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - - if (lp->chip_type == RTL8002) - return set_rx_mode_8002(dev); - else - return set_rx_mode_8012(dev); -} - - -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); |