--- /dev/null
+/* 3c574.c: A PCMCIA ethernet driver for the 3com 3c574 "RoadRunner".
+
+ Written 1993-1998 by
+ Donald Becker, becker@scyld.com, (driver core) and
+ David Hinds, dahinds@users.sourceforge.net (from his PC card code).
+ Locking fixes (C) Copyright 2003 Red Hat Inc
+
+ This software may be used and distributed according to the terms of
+ the GNU General Public License, incorporated herein by reference.
+
+ This driver derives from Donald Becker's 3c509 core, which has the
+ following copyright:
+ Copyright 1993 United States Government as represented by the
+ Director, National Security Agency.
+
+
+*/
+
+/*
+ Theory of Operation
+
+I. Board Compatibility
+
+This device driver is designed for the 3Com 3c574 PC card Fast Ethernet
+Adapter.
+
+II. Board-specific settings
+
+None -- PC cards are autoconfigured.
+
+III. Driver operation
+
+The 3c574 uses a Boomerang-style interface, without the bus-master capability.
+See the Boomerang driver and documentation for most details.
+
+IV. Notes and chip documentation.
+
+Two added registers are used to enhance PIO performance, RunnerRdCtrl and
+RunnerWrCtrl. These are 11 bit down-counters that are preloaded with the
+count of word (16 bits) reads or writes the driver is about to do to the Rx
+or Tx FIFO. The chip is then able to hide the internal-PCI-bus to PC-card
+translation latency by buffering the I/O operations with an 8 word FIFO.
+Note: No other chip accesses are permitted when this buffer is used.
+
+A second enhancement is that both attribute and common memory space
+0x0800-0x0fff can translated to the PIO FIFO. Thus memory operations (faster
+with *some* PCcard bridges) may be used instead of I/O operations.
+This is enabled by setting the 0x10 bit in the PCMCIA LAN COR.
+
+Some slow PC card bridges work better if they never see a WAIT signal.
+This is configured by setting the 0x20 bit in the PCMCIA LAN COR.
+Only do this after testing that it is reliable and improves performance.
+
+The upper five bits of RunnerRdCtrl are used to window into PCcard
+configuration space registers. Window 0 is the regular Boomerang/Odie
+register set, 1-5 are various PC card control registers, and 16-31 are
+the (reversed!) CIS table.
+
+A final note: writing the InternalConfig register in window 3 with an
+invalid ramWidth is Very Bad.
+
+V. References
+
+http://www.scyld.com/expert/NWay.html
+http://www.national.com/opf/DP/DP83840A.html
+
+Thanks to Terry Murphy of 3Com for providing development information for
+earlier 3Com products.
+
+*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/in.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/ioport.h>
+#include <linux/bitops.h>
+#include <linux/mii.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ciscode.h>
+#include <pcmcia/ds.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+/*====================================================================*/
+
+/* Module parameters */
+
+MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
+MODULE_DESCRIPTION("3Com 3c574 series PCMCIA ethernet driver");
+MODULE_LICENSE("GPL");
+
+#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
+
+/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
+INT_MODULE_PARM(max_interrupt_work, 32);
+
+/* Force full duplex modes? */
+INT_MODULE_PARM(full_duplex, 0);
+
+/* Autodetect link polarity reversal? */
+INT_MODULE_PARM(auto_polarity, 1);
+
+
+/*====================================================================*/
+
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT ((800*HZ)/1000)
+
+/* To minimize the size of the driver source and make the driver more
+ readable not all constants are symbolically defined.
+ You'll need the manual if you want to understand driver details anyway. */
+/* Offsets from base I/O address. */
+#define EL3_DATA 0x00
+#define EL3_CMD 0x0e
+#define EL3_STATUS 0x0e
+
+#define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
+
+/* The top five bits written to EL3_CMD are a command, the lower
+ 11 bits are the parameter, if applicable. */
+enum el3_cmds {
+ TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
+ RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
+ TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
+ FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
+ SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
+ SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
+ StatsDisable = 22<<11, StopCoax = 23<<11,
+};
+
+enum elxl_status {
+ IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
+ TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
+ IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000 };
+
+/* The SetRxFilter command accepts the following classes: */
+enum RxFilter {
+ RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
+};
+
+enum Window0 {
+ Wn0EepromCmd = 10, Wn0EepromData = 12, /* EEPROM command/address, data. */
+ IntrStatus=0x0E, /* Valid in all windows. */
+};
+/* These assumes the larger EEPROM. */
+enum Win0_EEPROM_cmds {
+ EEPROM_Read = 0x200, EEPROM_WRITE = 0x100, EEPROM_ERASE = 0x300,
+ EEPROM_EWENB = 0x30, /* Enable erasing/writing for 10 msec. */
+ EEPROM_EWDIS = 0x00, /* Disable EWENB before 10 msec timeout. */
+};
+
+/* Register window 1 offsets, the window used in normal operation.
+ On the "Odie" this window is always mapped at offsets 0x10-0x1f.
+ Except for TxFree, which is overlapped by RunnerWrCtrl. */
+enum Window1 {
+ TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14,
+ RxStatus = 0x18, Timer=0x1A, TxStatus = 0x1B,
+ TxFree = 0x0C, /* Remaining free bytes in Tx buffer. */
+ RunnerRdCtrl = 0x16, RunnerWrCtrl = 0x1c,
+};
+
+enum Window3 { /* Window 3: MAC/config bits. */
+ Wn3_Config=0, Wn3_MAC_Ctrl=6, Wn3_Options=8,
+};
+enum wn3_config {
+ Ram_size = 7,
+ Ram_width = 8,
+ Ram_speed = 0x30,
+ Rom_size = 0xc0,
+ Ram_split_shift = 16,
+ Ram_split = 3 << Ram_split_shift,
+ Xcvr_shift = 20,
+ Xcvr = 7 << Xcvr_shift,
+ Autoselect = 0x1000000,
+};
+
+enum Window4 { /* Window 4: Xcvr/media bits. */
+ Wn4_FIFODiag = 4, Wn4_NetDiag = 6, Wn4_PhysicalMgmt=8, Wn4_Media = 10,
+};
+
+#define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
+
+struct el3_private {
+ struct pcmcia_device *p_dev;
+ u16 advertising, partner; /* NWay media advertisement */
+ unsigned char phys; /* MII device address */
+ unsigned int autoselect:1, default_media:3; /* Read from the EEPROM/Wn3_Config. */
+ /* for transceiver monitoring */
+ struct timer_list media;
+ unsigned short media_status;
+ unsigned short fast_poll;
+ unsigned long last_irq;
+ spinlock_t window_lock; /* Guards the Window selection */
+};
+
+/* Set iff a MII transceiver on any interface requires mdio preamble.
+ This only set with the original DP83840 on older 3c905 boards, so the extra
+ code size of a per-interface flag is not worthwhile. */
+static char mii_preamble_required = 0;
+
+/* Index of functions. */
+
+static int tc574_config(struct pcmcia_device *link);
+static void tc574_release(struct pcmcia_device *link);
+
+static void mdio_sync(unsigned int ioaddr, int bits);
+static int mdio_read(unsigned int ioaddr, int phy_id, int location);
+static void mdio_write(unsigned int ioaddr, int phy_id, int location,
+ int value);
+static unsigned short read_eeprom(unsigned int ioaddr, int index);
+static void tc574_wait_for_completion(struct net_device *dev, int cmd);
+
+static void tc574_reset(struct net_device *dev);
+static void media_check(unsigned long arg);
+static int el3_open(struct net_device *dev);
+static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
+ struct net_device *dev);
+static irqreturn_t el3_interrupt(int irq, void *dev_id);
+static void update_stats(struct net_device *dev);
+static struct net_device_stats *el3_get_stats(struct net_device *dev);
+static int el3_rx(struct net_device *dev, int worklimit);
+static int el3_close(struct net_device *dev);
+static void el3_tx_timeout(struct net_device *dev);
+static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+static void set_rx_mode(struct net_device *dev);
+static void set_multicast_list(struct net_device *dev);
+
+static void tc574_detach(struct pcmcia_device *p_dev);
+
+/*
+ tc574_attach() creates an "instance" of the driver, allocating
+ local data structures for one device. The device is registered
+ with Card Services.
+*/
+static const struct net_device_ops el3_netdev_ops = {
+ .ndo_open = el3_open,
+ .ndo_stop = el3_close,
+ .ndo_start_xmit = el3_start_xmit,
+ .ndo_tx_timeout = el3_tx_timeout,
+ .ndo_get_stats = el3_get_stats,
+ .ndo_do_ioctl = el3_ioctl,
+ .ndo_set_rx_mode = set_multicast_list,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static int tc574_probe(struct pcmcia_device *link)
+{
+ struct el3_private *lp;
+ struct net_device *dev;
+
+ dev_dbg(&link->dev, "3c574_attach()\n");
+
+ /* Create the PC card device object. */
+ dev = alloc_etherdev(sizeof(struct el3_private));
+ if (!dev)
+ return -ENOMEM;
+ lp = netdev_priv(dev);
+ link->priv = dev;
+ lp->p_dev = link;
+
+ spin_lock_init(&lp->window_lock);
+ link->resource[0]->end = 32;
+ link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16;
+ link->config_flags |= CONF_ENABLE_IRQ;
+ link->config_index = 1;
+
+ dev->netdev_ops = &el3_netdev_ops;
+ dev->watchdog_timeo = TX_TIMEOUT;
+
+ return tc574_config(link);
+}
+
+static void tc574_detach(struct pcmcia_device *link)
+{
+ struct net_device *dev = link->priv;
+
+ dev_dbg(&link->dev, "3c574_detach()\n");
+
+ unregister_netdev(dev);
+
+ tc574_release(link);
+
+ free_netdev(dev);
+} /* tc574_detach */
+
+static const char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
+
+static int tc574_config(struct pcmcia_device *link)
+{
+ struct net_device *dev = link->priv;
+ struct el3_private *lp = netdev_priv(dev);
+ int ret, i, j;
+ unsigned int ioaddr;
+ __be16 *phys_addr;
+ char *cardname;
+ __u32 config;
+ u8 *buf;
+ size_t len;
+
+ phys_addr = (__be16 *)dev->dev_addr;
+
+ dev_dbg(&link->dev, "3c574_config()\n");
+
+ link->io_lines = 16;
+
+ for (i = j = 0; j < 0x400; j += 0x20) {
+ link->resource[0]->start = j ^ 0x300;
+ i = pcmcia_request_io(link);
+ if (i == 0)
+ break;
+ }
+ if (i != 0)
+ goto failed;
+
+ ret = pcmcia_request_irq(link, el3_interrupt);
+ if (ret)
+ goto failed;
+
+ ret = pcmcia_enable_device(link);
+ if (ret)
+ goto failed;
+
+ dev->irq = link->irq;
+ dev->base_addr = link->resource[0]->start;
+
+ ioaddr = dev->base_addr;
+
+ /* The 3c574 normally uses an EEPROM for configuration info, including
+ the hardware address. The future products may include a modem chip
+ and put the address in the CIS. */
+
+ len = pcmcia_get_tuple(link, 0x88, &buf);
+ if (buf && len >= 6) {
+ for (i = 0; i < 3; i++)
+ phys_addr[i] = htons(le16_to_cpu(buf[i * 2]));
+ kfree(buf);
+ } else {
+ kfree(buf); /* 0 < len < 6 */
+ EL3WINDOW(0);
+ for (i = 0; i < 3; i++)
+ phys_addr[i] = htons(read_eeprom(ioaddr, i + 10));
+ if (phys_addr[0] == htons(0x6060)) {
+ pr_notice("IO port conflict at 0x%03lx-0x%03lx\n",
+ dev->base_addr, dev->base_addr+15);
+ goto failed;
+ }
+ }
+ if (link->prod_id[1])
+ cardname = link->prod_id[1];
+ else
+ cardname = "3Com 3c574";
+
+ {
+ u_char mcr;
+ outw(2<<11, ioaddr + RunnerRdCtrl);
+ mcr = inb(ioaddr + 2);
+ outw(0<<11, ioaddr + RunnerRdCtrl);
+ pr_info(" ASIC rev %d,", mcr>>3);
+ EL3WINDOW(3);
+ config = inl(ioaddr + Wn3_Config);
+ lp->default_media = (config & Xcvr) >> Xcvr_shift;
+ lp->autoselect = config & Autoselect ? 1 : 0;
+ }
+
+ init_timer(&lp->media);
+
+ {
+ int phy;
+
+ /* Roadrunner only: Turn on the MII transceiver */
+ outw(0x8040, ioaddr + Wn3_Options);
+ mdelay(1);
+ outw(0xc040, ioaddr + Wn3_Options);
+ tc574_wait_for_completion(dev, TxReset);
+ tc574_wait_for_completion(dev, RxReset);
+ mdelay(1);
+ outw(0x8040, ioaddr + Wn3_Options);
+
+ EL3WINDOW(4);
+ for (phy = 1; phy <= 32; phy++) {
+ int mii_status;
+ mdio_sync(ioaddr, 32);
+ mii_status = mdio_read(ioaddr, phy & 0x1f, 1);
+ if (mii_status != 0xffff) {
+ lp->phys = phy & 0x1f;
+ dev_dbg(&link->dev, " MII transceiver at "
+ "index %d, status %x.\n",
+ phy, mii_status);
+ if ((mii_status & 0x0040) == 0)
+ mii_preamble_required = 1;
+ break;
+ }
+ }
+ if (phy > 32) {
+ pr_notice(" No MII transceivers found!\n");
+ goto failed;
+ }
+ i = mdio_read(ioaddr, lp->phys, 16) | 0x40;
+ mdio_write(ioaddr, lp->phys, 16, i);
+ lp->advertising = mdio_read(ioaddr, lp->phys, 4);
+ if (full_duplex) {
+ /* Only advertise the FD media types. */
+ lp->advertising &= ~0x02a0;
+ mdio_write(ioaddr, lp->phys, 4, lp->advertising);
+ }
+ }
+
+ SET_NETDEV_DEV(dev, &link->dev);
+
+ if (register_netdev(dev) != 0) {
+ pr_notice("register_netdev() failed\n");
+ goto failed;
+ }
+
+ netdev_info(dev, "%s at io %#3lx, irq %d, hw_addr %pM\n",
+ cardname, dev->base_addr, dev->irq, dev->dev_addr);
+ netdev_info(dev, " %dK FIFO split %s Rx:Tx, %sMII interface.\n",
+ 8 << (config & Ram_size),
+ ram_split[(config & Ram_split) >> Ram_split_shift],
+ config & Autoselect ? "autoselect " : "");
+
+ return 0;
+
+failed:
+ tc574_release(link);
+ return -ENODEV;
+
+} /* tc574_config */
+
+static void tc574_release(struct pcmcia_device *link)
+{
+ pcmcia_disable_device(link);
+}
+
+static int tc574_suspend(struct pcmcia_device *link)
+{
+ struct net_device *dev = link->priv;
+
+ if (link->open)
+ netif_device_detach(dev);
+
+ return 0;
+}
+
+static int tc574_resume(struct pcmcia_device *link)
+{
+ struct net_device *dev = link->priv;
+
+ if (link->open) {
+ tc574_reset(dev);
+ netif_device_attach(dev);
+ }
+
+ return 0;
+}
+
+static void dump_status(struct net_device *dev)
+{
+ unsigned int ioaddr = dev->base_addr;
+ EL3WINDOW(1);
+ netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x, tx free %04x\n",
+ inw(ioaddr+EL3_STATUS),
+ inw(ioaddr+RxStatus), inb(ioaddr+TxStatus),
+ inw(ioaddr+TxFree));
+ EL3WINDOW(4);
+ netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
+ inw(ioaddr+0x04), inw(ioaddr+0x06),
+ inw(ioaddr+0x08), inw(ioaddr+0x0a));
+ EL3WINDOW(1);
+}
+
+/*
+ Use this for commands that may take time to finish
+*/
+static void tc574_wait_for_completion(struct net_device *dev, int cmd)
+{
+ int i = 1500;
+ outw(cmd, dev->base_addr + EL3_CMD);
+ while (--i > 0)
+ if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
+ if (i == 0)
+ netdev_notice(dev, "command 0x%04x did not complete!\n", cmd);
+}
+
+/* Read a word from the EEPROM using the regular EEPROM access register.
+ Assume that we are in register window zero.
+ */
+static unsigned short read_eeprom(unsigned int ioaddr, int index)
+{
+ int timer;
+ outw(EEPROM_Read + index, ioaddr + Wn0EepromCmd);
+ /* Pause for at least 162 usec for the read to take place. */
+ for (timer = 1620; timer >= 0; timer--) {
+ if ((inw(ioaddr + Wn0EepromCmd) & 0x8000) == 0)
+ break;
+ }
+ return inw(ioaddr + Wn0EepromData);
+}
+
+/* MII transceiver control section.
+ Read and write the MII registers using software-generated serial
+ MDIO protocol. See the MII specifications or DP83840A data sheet
+ for details.
+ The maxium data clock rate is 2.5 Mhz. The timing is easily met by the
+ slow PC card interface. */
+
+#define MDIO_SHIFT_CLK 0x01
+#define MDIO_DIR_WRITE 0x04
+#define MDIO_DATA_WRITE0 (0x00 | MDIO_DIR_WRITE)
+#define MDIO_DATA_WRITE1 (0x02 | MDIO_DIR_WRITE)
+#define MDIO_DATA_READ 0x02
+#define MDIO_ENB_IN 0x00
+
+/* Generate the preamble required for initial synchronization and
+ a few older transceivers. */
+static void mdio_sync(unsigned int ioaddr, int bits)
+{
+ unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt;
+
+ /* Establish sync by sending at least 32 logic ones. */
+ while (-- bits >= 0) {
+ outw(MDIO_DATA_WRITE1, mdio_addr);
+ outw(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
+ }
+}
+
+static int mdio_read(unsigned int ioaddr, int phy_id, int location)
+{
+ int i;
+ int read_cmd = (0xf6 << 10) | (phy_id << 5) | location;
+ unsigned int retval = 0;
+ unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt;
+
+ if (mii_preamble_required)
+ mdio_sync(ioaddr, 32);
+
+ /* Shift the read command bits out. */
+ for (i = 14; i >= 0; i--) {
+ int dataval = (read_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
+ outw(dataval, mdio_addr);
+ outw(dataval | MDIO_SHIFT_CLK, mdio_addr);
+ }
+ /* Read the two transition, 16 data, and wire-idle bits. */
+ for (i = 19; i > 0; i--) {
+ outw(MDIO_ENB_IN, mdio_addr);
+ retval = (retval << 1) | ((inw(mdio_addr) & MDIO_DATA_READ) ? 1 : 0);
+ outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
+ }
+ return (retval>>1) & 0xffff;
+}
+
+static void mdio_write(unsigned int ioaddr, int phy_id, int location, int value)
+{
+ int write_cmd = 0x50020000 | (phy_id << 23) | (location << 18) | value;
+ unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt;
+ int i;
+
+ if (mii_preamble_required)
+ mdio_sync(ioaddr, 32);
+
+ /* Shift the command bits out. */
+ for (i = 31; i >= 0; i--) {
+ int dataval = (write_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
+ outw(dataval, mdio_addr);
+ outw(dataval | MDIO_SHIFT_CLK, mdio_addr);
+ }
+ /* Leave the interface idle. */
+ for (i = 1; i >= 0; i--) {
+ outw(MDIO_ENB_IN, mdio_addr);
+ outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
+ }
+}
+
+/* Reset and restore all of the 3c574 registers. */
+static void tc574_reset(struct net_device *dev)
+{
+ struct el3_private *lp = netdev_priv(dev);
+ int i;
+ unsigned int ioaddr = dev->base_addr;
+ unsigned long flags;
+
+ tc574_wait_for_completion(dev, TotalReset|0x10);
+
+ spin_lock_irqsave(&lp->window_lock, flags);
+ /* Clear any transactions in progress. */
+ outw(0, ioaddr + RunnerWrCtrl);
+ outw(0, ioaddr + RunnerRdCtrl);
+
+ /* Set the station address and mask. */
+ EL3WINDOW(2);
+ for (i = 0; i < 6; i++)
+ outb(dev->dev_addr[i], ioaddr + i);
+ for (; i < 12; i+=2)
+ outw(0, ioaddr + i);
+
+ /* Reset config options */
+ EL3WINDOW(3);
+ outb((dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl);
+ outl((lp->autoselect ? 0x01000000 : 0) | 0x0062001b,
+ ioaddr + Wn3_Config);
+ /* Roadrunner only: Turn on the MII transceiver. */
+ outw(0x8040, ioaddr + Wn3_Options);
+ mdelay(1);
+ outw(0xc040, ioaddr + Wn3_Options);
+ EL3WINDOW(1);
+ spin_unlock_irqrestore(&lp->window_lock, flags);
+
+ tc574_wait_for_completion(dev, TxReset);
+ tc574_wait_for_completion(dev, RxReset);
+ mdelay(1);
+ spin_lock_irqsave(&lp->window_lock, flags);
+ EL3WINDOW(3);
+ outw(0x8040, ioaddr + Wn3_Options);
+
+ /* Switch to the stats window, and clear all stats by reading. */
+ outw(StatsDisable, ioaddr + EL3_CMD);
+ EL3WINDOW(6);
+ for (i = 0; i < 10; i++)
+ inb(ioaddr + i);
+ inw(ioaddr + 10);
+ inw(ioaddr + 12);
+ EL3WINDOW(4);
+ inb(ioaddr + 12);
+ inb(ioaddr + 13);
+
+ /* .. enable any extra statistics bits.. */
+ outw(0x0040, ioaddr + Wn4_NetDiag);
+
+ EL3WINDOW(1);
+ spin_unlock_irqrestore(&lp->window_lock, flags);
+
+ /* .. re-sync MII and re-fill what NWay is advertising. */
+ mdio_sync(ioaddr, 32);
+ mdio_write(ioaddr, lp->phys, 4, lp->advertising);
+ if (!auto_polarity) {
+ /* works for TDK 78Q2120 series MII's */
+ i = mdio_read(ioaddr, lp->phys, 16) | 0x20;
+ mdio_write(ioaddr, lp->phys, 16, i);
+ }
+
+ spin_lock_irqsave(&lp->window_lock, flags);
+ /* Switch to register set 1 for normal use, just for TxFree. */
+ set_rx_mode(dev);
+ spin_unlock_irqrestore(&lp->window_lock, flags);
+ outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
+ outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
+ outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
+ /* Allow status bits to be seen. */
+ outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
+ /* Ack all pending events, and set active indicator mask. */
+ outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
+ ioaddr + EL3_CMD);
+ outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
+ | AdapterFailure | RxEarly, ioaddr + EL3_CMD);
+}
+
+static int el3_open(struct net_device *dev)
+{
+ struct el3_private *lp = netdev_priv(dev);
+ struct pcmcia_device *link = lp->p_dev;
+
+ if (!pcmcia_dev_present(link))
+ return -ENODEV;
+
+ link->open++;
+ netif_start_queue(dev);
+
+ tc574_reset(dev);
+ lp->media.function = media_check;
+ lp->media.data = (unsigned long) dev;
+ lp->media.expires = jiffies + HZ;
+ add_timer(&lp->media);
+
+ dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
+ dev->name, inw(dev->base_addr + EL3_STATUS));
+
+ return 0;
+}
+
+static void el3_tx_timeout(struct net_device *dev)
+{
+ unsigned int ioaddr = dev->base_addr;
+
+ netdev_notice(dev, "Transmit timed out!\n");
+ dump_status(dev);
+ dev->stats.tx_errors++;
+ dev->trans_start = jiffies; /* prevent tx timeout */
+ /* Issue TX_RESET and TX_START commands. */
+ tc574_wait_for_completion(dev, TxReset);
+ outw(TxEnable, ioaddr + EL3_CMD);
+ netif_wake_queue(dev);
+}
+
+static void pop_tx_status(struct net_device *dev)
+{
+ unsigned int ioaddr = dev->base_addr;
+ int i;
+
+ /* Clear the Tx status stack. */
+ for (i = 32; i > 0; i--) {
+ u_char tx_status = inb(ioaddr + TxStatus);
+ if (!(tx_status & 0x84))
+ break;
+ /* reset transmitter on jabber error or underrun */
+ if (tx_status & 0x30)
+ tc574_wait_for_completion(dev, TxReset);
+ if (tx_status & 0x38) {
+ pr_debug("%s: transmit error: status 0x%02x\n",
+ dev->name, tx_status);
+ outw(TxEnable, ioaddr + EL3_CMD);
+ dev->stats.tx_aborted_errors++;
+ }
+ outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */
+ }
+}
+
+static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ unsigned int ioaddr = dev->base_addr;
+ struct el3_private *lp = netdev_priv(dev);
+ unsigned long flags;
+
+ pr_debug("%s: el3_start_xmit(length = %ld) called, "
+ "status %4.4x.\n", dev->name, (long)skb->len,
+ inw(ioaddr + EL3_STATUS));
+
+ spin_lock_irqsave(&lp->window_lock, flags);
+
+ dev->stats.tx_bytes += skb->len;
+
+ /* Put out the doubleword header... */
+ outw(skb->len, ioaddr + TX_FIFO);
+ outw(0, ioaddr + TX_FIFO);
+ /* ... and the packet rounded to a doubleword. */
+ outsl(ioaddr + TX_FIFO, skb->data, (skb->len+3)>>2);
+
+ /* TxFree appears only in Window 1, not offset 0x1c. */
+ if (inw(ioaddr + TxFree) <= 1536) {
+ netif_stop_queue(dev);
+ /* Interrupt us when the FIFO has room for max-sized packet.
+ The threshold is in units of dwords. */
+ outw(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD);
+ }
+
+ pop_tx_status(dev);
+ spin_unlock_irqrestore(&lp->window_lock, flags);
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+}
+
+/* The EL3 interrupt handler. */
+static irqreturn_t el3_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = (struct net_device *) dev_id;
+ struct el3_private *lp = netdev_priv(dev);
+ unsigned int ioaddr;
+ unsigned status;
+ int work_budget = max_interrupt_work;
+ int handled = 0;
+
+ if (!netif_device_present(dev))
+ return IRQ_NONE;
+ ioaddr = dev->base_addr;
+
+ pr_debug("%s: interrupt, status %4.4x.\n",
+ dev->name, inw(ioaddr + EL3_STATUS));
+
+ spin_lock(&lp->window_lock);
+
+ while ((status = inw(ioaddr + EL3_STATUS)) &
+ (IntLatch | RxComplete | RxEarly | StatsFull)) {
+ if (!netif_device_present(dev) ||
+ ((status & 0xe000) != 0x2000)) {
+ pr_debug("%s: Interrupt from dead card\n", dev->name);
+ break;
+ }
+
+ handled = 1;
+
+ if (status & RxComplete)
+ work_budget = el3_rx(dev, work_budget);
+
+ if (status & TxAvailable) {
+ pr_debug(" TX room bit was handled.\n");
+ /* There's room in the FIFO for a full-sized packet. */
+ outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
+ netif_wake_queue(dev);
+ }
+
+ if (status & TxComplete)
+ pop_tx_status(dev);
+
+ if (status & (AdapterFailure | RxEarly | StatsFull)) {
+ /* Handle all uncommon interrupts. */
+ if (status & StatsFull)
+ update_stats(dev);
+ if (status & RxEarly) {
+ work_budget = el3_rx(dev, work_budget);
+ outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
+ }
+ if (status & AdapterFailure) {
+ u16 fifo_diag;
+ EL3WINDOW(4);
+ fifo_diag = inw(ioaddr + Wn4_FIFODiag);
+ EL3WINDOW(1);
+ netdev_notice(dev, "adapter failure, FIFO diagnostic register %04x\n",
+ fifo_diag);
+ if (fifo_diag & 0x0400) {
+ /* Tx overrun */
+ tc574_wait_for_completion(dev, TxReset);
+ outw(TxEnable, ioaddr + EL3_CMD);
+ }
+ if (fifo_diag & 0x2000) {
+ /* Rx underrun */
+ tc574_wait_for_completion(dev, RxReset);
+ set_rx_mode(dev);
+ outw(RxEnable, ioaddr + EL3_CMD);
+ }
+ outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
+ }
+ }
+
+ if (--work_budget < 0) {
+ pr_debug("%s: Too much work in interrupt, "
+ "status %4.4x.\n", dev->name, status);
+ /* Clear all interrupts */
+ outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
+ break;
+ }
+ /* Acknowledge the IRQ. */
+ outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
+ }
+
+ pr_debug("%s: exiting interrupt, status %4.4x.\n",
+ dev->name, inw(ioaddr + EL3_STATUS));
+
+ spin_unlock(&lp->window_lock);
+ return IRQ_RETVAL(handled);
+}
+
+/*
+ This timer serves two purposes: to check for missed interrupts
+ (and as a last resort, poll the NIC for events), and to monitor
+ the MII, reporting changes in cable status.
+*/
+static void media_check(unsigned long arg)
+{
+ struct net_device *dev = (struct net_device *) arg;
+ struct el3_private *lp = netdev_priv(dev);
+ unsigned int ioaddr = dev->base_addr;
+ unsigned long flags;
+ unsigned short /* cable, */ media, partner;
+
+ if (!netif_device_present(dev))
+ goto reschedule;
+
+ /* Check for pending interrupt with expired latency timer: with
+ this, we can limp along even if the interrupt is blocked */
+ if ((inw(ioaddr + EL3_STATUS) & IntLatch) && (inb(ioaddr + Timer) == 0xff)) {
+ if (!lp->fast_poll)
+ netdev_info(dev, "interrupt(s) dropped!\n");
+
+ local_irq_save(flags);
+ el3_interrupt(dev->irq, dev);
+ local_irq_restore(flags);
+
+ lp->fast_poll = HZ;
+ }
+ if (lp->fast_poll) {
+ lp->fast_poll--;
+ lp->media.expires = jiffies + 2*HZ/100;
+ add_timer(&lp->media);
+ return;
+ }
+
+ spin_lock_irqsave(&lp->window_lock, flags);
+ EL3WINDOW(4);
+ media = mdio_read(ioaddr, lp->phys, 1);
+ partner = mdio_read(ioaddr, lp->phys, 5);
+ EL3WINDOW(1);
+
+ if (media != lp->media_status) {
+ if ((media ^ lp->media_status) & 0x0004)
+ netdev_info(dev, "%s link beat\n",
+ (lp->media_status & 0x0004) ? "lost" : "found");
+ if ((media ^ lp->media_status) & 0x0020) {
+ lp->partner = 0;
+ if (lp->media_status & 0x0020) {
+ netdev_info(dev, "autonegotiation restarted\n");
+ } else if (partner) {
+ partner &= lp->advertising;
+ lp->partner = partner;
+ netdev_info(dev, "autonegotiation complete: "
+ "%dbaseT-%cD selected\n",
+ (partner & 0x0180) ? 100 : 10,
+ (partner & 0x0140) ? 'F' : 'H');
+ } else {
+ netdev_info(dev, "link partner did not autonegotiate\n");
+ }
+
+ EL3WINDOW(3);
+ outb((partner & 0x0140 ? 0x20 : 0) |
+ (dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl);
+ EL3WINDOW(1);
+
+ }
+ if (media & 0x0010)
+ netdev_info(dev, "remote fault detected\n");
+ if (media & 0x0002)
+ netdev_info(dev, "jabber detected\n");
+ lp->media_status = media;
+ }
+ spin_unlock_irqrestore(&lp->window_lock, flags);
+
+reschedule:
+ lp->media.expires = jiffies + HZ;
+ add_timer(&lp->media);
+}
+
+static struct net_device_stats *el3_get_stats(struct net_device *dev)
+{
+ struct el3_private *lp = netdev_priv(dev);
+
+ if (netif_device_present(dev)) {
+ unsigned long flags;
+ spin_lock_irqsave(&lp->window_lock, flags);
+ update_stats(dev);
+ spin_unlock_irqrestore(&lp->window_lock, flags);
+ }
+ return &dev->stats;
+}
+
+/* Update statistics.
+ Surprisingly this need not be run single-threaded, but it effectively is.
+ The counters clear when read, so the adds must merely be atomic.
+ */
+static void update_stats(struct net_device *dev)
+{
+ unsigned int ioaddr = dev->base_addr;
+ u8 rx, tx, up;
+
+ pr_debug("%s: updating the statistics.\n", dev->name);
+
+ if (inw(ioaddr+EL3_STATUS) == 0xffff) /* No card. */
+ return;
+
+ /* Unlike the 3c509 we need not turn off stats updates while reading. */
+ /* Switch to the stats window, and read everything. */
+ EL3WINDOW(6);
+ dev->stats.tx_carrier_errors += inb(ioaddr + 0);
+ dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
+ /* Multiple collisions. */ inb(ioaddr + 2);
+ dev->stats.collisions += inb(ioaddr + 3);
+ dev->stats.tx_window_errors += inb(ioaddr + 4);
+ dev->stats.rx_fifo_errors += inb(ioaddr + 5);
+ dev->stats.tx_packets += inb(ioaddr + 6);
+ up = inb(ioaddr + 9);
+ dev->stats.tx_packets += (up&0x30) << 4;
+ /* Rx packets */ inb(ioaddr + 7);
+ /* Tx deferrals */ inb(ioaddr + 8);
+ rx = inw(ioaddr + 10);
+ tx = inw(ioaddr + 12);
+
+ EL3WINDOW(4);
+ /* BadSSD */ inb(ioaddr + 12);
+ up = inb(ioaddr + 13);
+
+ EL3WINDOW(1);
+}
+
+static int el3_rx(struct net_device *dev, int worklimit)
+{
+ unsigned int ioaddr = dev->base_addr;
+ short rx_status;
+
+ pr_debug("%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
+ dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RxStatus));
+ while (!((rx_status = inw(ioaddr + RxStatus)) & 0x8000) &&
+ worklimit > 0) {
+ worklimit--;
+ if (rx_status & 0x4000) { /* Error, update stats. */
+ short error = rx_status & 0x3800;
+ dev->stats.rx_errors++;
+ switch (error) {
+ case 0x0000: dev->stats.rx_over_errors++; break;
+ case 0x0800: dev->stats.rx_length_errors++; break;
+ case 0x1000: dev->stats.rx_frame_errors++; break;
+ case 0x1800: dev->stats.rx_length_errors++; break;
+ case 0x2000: dev->stats.rx_frame_errors++; break;
+ case 0x2800: dev->stats.rx_crc_errors++; break;
+ }
+ } else {
+ short pkt_len = rx_status & 0x7ff;
+ struct sk_buff *skb;
+
+ skb = netdev_alloc_skb(dev, pkt_len + 5);
+
+ pr_debug(" Receiving packet size %d status %4.4x.\n",
+ pkt_len, rx_status);
+ if (skb != NULL) {
+ skb_reserve(skb, 2);
+ insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
+ ((pkt_len+3)>>2));
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_rx(skb);
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += pkt_len;
+ } else {
+ pr_debug("%s: couldn't allocate a sk_buff of"
+ " size %d.\n", dev->name, pkt_len);
+ dev->stats.rx_dropped++;
+ }
+ }
+ tc574_wait_for_completion(dev, RxDiscard);
+ }
+
+ return worklimit;
+}
+
+/* Provide ioctl() calls to examine the MII xcvr state. */
+static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+ struct el3_private *lp = netdev_priv(dev);
+ unsigned int ioaddr = dev->base_addr;
+ struct mii_ioctl_data *data = if_mii(rq);
+ int phy = lp->phys & 0x1f;
+
+ pr_debug("%s: In ioct(%-.6s, %#4.4x) %4.4x %4.4x %4.4x %4.4x.\n",
+ dev->name, rq->ifr_ifrn.ifrn_name, cmd,
+ data->phy_id, data->reg_num, data->val_in, data->val_out);
+
+ switch(cmd) {
+ case SIOCGMIIPHY: /* Get the address of the PHY in use. */
+ data->phy_id = phy;
+ case SIOCGMIIREG: /* Read the specified MII register. */
+ {
+ int saved_window;
+ unsigned long flags;
+
+ spin_lock_irqsave(&lp->window_lock, flags);
+ saved_window = inw(ioaddr + EL3_CMD) >> 13;
+ EL3WINDOW(4);
+ data->val_out = mdio_read(ioaddr, data->phy_id & 0x1f,
+ data->reg_num & 0x1f);
+ EL3WINDOW(saved_window);
+ spin_unlock_irqrestore(&lp->window_lock, flags);
+ return 0;
+ }
+ case SIOCSMIIREG: /* Write the specified MII register */
+ {
+ int saved_window;
+ unsigned long flags;
+
+ spin_lock_irqsave(&lp->window_lock, flags);
+ saved_window = inw(ioaddr + EL3_CMD) >> 13;
+ EL3WINDOW(4);
+ mdio_write(ioaddr, data->phy_id & 0x1f,
+ data->reg_num & 0x1f, data->val_in);
+ EL3WINDOW(saved_window);
+ spin_unlock_irqrestore(&lp->window_lock, flags);
+ return 0;
+ }
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+/* The Odie chip has a 64 bin multicast filter, but the bit layout is not
+ documented. Until it is we revert to receiving all multicast frames when
+ any multicast reception is desired.
+ Note: My other drivers emit a log message whenever promiscuous mode is
+ entered to help detect password sniffers. This is less desirable on
+ typical PC card machines, so we omit the message.
+ */
+
+static void set_rx_mode(struct net_device *dev)
+{
+ unsigned int ioaddr = dev->base_addr;
+
+ if (dev->flags & IFF_PROMISC)
+ outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm,
+ ioaddr + EL3_CMD);
+ else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
+ outw(SetRxFilter|RxStation|RxMulticast|RxBroadcast, ioaddr + EL3_CMD);
+ else
+ outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
+}
+
+static void set_multicast_list(struct net_device *dev)
+{
+ struct el3_private *lp = netdev_priv(dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&lp->window_lock, flags);
+ set_rx_mode(dev);
+ spin_unlock_irqrestore(&lp->window_lock, flags);
+}
+
+static int el3_close(struct net_device *dev)
+{
+ unsigned int ioaddr = dev->base_addr;
+ struct el3_private *lp = netdev_priv(dev);
+ struct pcmcia_device *link = lp->p_dev;
+
+ dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
+
+ if (pcmcia_dev_present(link)) {
+ unsigned long flags;
+
+ /* Turn off statistics ASAP. We update lp->stats below. */
+ outw(StatsDisable, ioaddr + EL3_CMD);
+
+ /* Disable the receiver and transmitter. */
+ outw(RxDisable, ioaddr + EL3_CMD);
+ outw(TxDisable, ioaddr + EL3_CMD);
+
+ /* Note: Switching to window 0 may disable the IRQ. */
+ EL3WINDOW(0);
+ spin_lock_irqsave(&lp->window_lock, flags);
+ update_stats(dev);
+ spin_unlock_irqrestore(&lp->window_lock, flags);
+
+ /* force interrupts off */
+ outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);
+ }
+
+ link->open--;
+ netif_stop_queue(dev);
+ del_timer_sync(&lp->media);
+
+ return 0;
+}
+
+static const struct pcmcia_device_id tc574_ids[] = {
+ PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0574),
+ PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0556, "cis/3CCFEM556.cis"),
+ PCMCIA_DEVICE_NULL,
+};
+MODULE_DEVICE_TABLE(pcmcia, tc574_ids);
+
+static struct pcmcia_driver tc574_driver = {
+ .owner = THIS_MODULE,
+ .name = "3c574_cs",
+ .probe = tc574_probe,
+ .remove = tc574_detach,
+ .id_table = tc574_ids,
+ .suspend = tc574_suspend,
+ .resume = tc574_resume,
+};
+module_pcmcia_driver(tc574_driver);
Code Review / kvmfornfv.git / blobdiff