| /* 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/pf/DP/DP83840.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/cs.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->conf.Attributes = CONF_ENABLE_IRQ; |
| link->conf.IntType = INT_MEMORY_AND_IO; |
| link->conf.ConfigIndex = 1; |
| |
| dev->netdev_ops = &el3_netdev_ops; |
| dev->watchdog_timeo = TX_TIMEOUT; |
| |
| return tc574_config(link); |
| } /* tc574_attach */ |
| |
| /* |
| |
| This deletes a driver "instance". The device is de-registered |
| with Card Services. If it has been released, all local data |
| structures are freed. Otherwise, the structures will be freed |
| when the device is released. |
| |
| */ |
| |
| 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 */ |
| |
| /* |
| tc574_config() is scheduled to run after a CARD_INSERTION event |
| is received, to configure the PCMCIA socket, and to make the |
| ethernet device available to the system. |
| */ |
| |
| 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_request_configuration(link, &link->conf); |
| 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 */ |
| |
| /* |
| After a card is removed, tc574_release() will unregister the net |
| device, and release the PCMCIA configuration. If the device is |
| still open, this will be postponed until it is closed. |
| */ |
| |
| 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. |
| Suprisingly 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 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, |
| .drv = { |
| .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); |