diff options
Diffstat (limited to 'drivers/net/pcmcia/3c574_cs.c')
| -rw-r--r-- | drivers/net/pcmcia/3c574_cs.c | 1181 |
1 files changed, 0 insertions, 1181 deletions
diff --git a/drivers/net/pcmcia/3c574_cs.c b/drivers/net/pcmcia/3c574_cs.c deleted file mode 100644 index 34c5e1cbf65d..000000000000 --- a/drivers/net/pcmcia/3c574_cs.c +++ /dev/null @@ -1,1181 +0,0 @@ -/* 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/init.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> -#include <asm/system.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_multicast_list = 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 = dev_alloc_skb(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, -}; - -static int __init init_tc574(void) -{ - return pcmcia_register_driver(&tc574_driver); -} - -static void __exit exit_tc574(void) -{ - pcmcia_unregister_driver(&tc574_driver); -} - -module_init(init_tc574); -module_exit(exit_tc574); |