diff options
Diffstat (limited to 'drivers/net/pcmcia/3c574_cs.c')
| -rw-r--r-- | drivers/net/pcmcia/3c574_cs.c | 1307 |
1 files changed, 1307 insertions, 0 deletions
diff --git a/drivers/net/pcmcia/3c574_cs.c b/drivers/net/pcmcia/3c574_cs.c new file mode 100644 index 000000000000..41e517114807 --- /dev/null +++ b/drivers/net/pcmcia/3c574_cs.c @@ -0,0 +1,1307 @@ +/* 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. + +*/ + +#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/ethtool.h> +#include <linux/bitops.h> + +#include <pcmcia/version.h> +#include <pcmcia/cs_types.h> +#include <pcmcia/cs.h> +#include <pcmcia/cistpl.h> +#include <pcmcia/cisreg.h> +#include <pcmcia/ciscode.h> +#include <pcmcia/ds.h> +#include <pcmcia/mem_op.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); + +#ifdef PCMCIA_DEBUG +INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG); +#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args) +static char *version = +"3c574_cs.c 1.65ac1 2003/04/07 Donald Becker/David Hinds, becker@scyld.com.\n"; +#else +#define DEBUG(n, args...) +#endif + +/*====================================================================*/ + +/* 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, +}; +union wn3_config { + int i; + struct w3_config_fields { + unsigned int ram_size:3, ram_width:1, ram_speed:2, rom_size:2; + int pad8:8; + unsigned int ram_split:2, pad18:2, xcvr:3, pad21:1, autoselect:1; + int pad24:7; + } u; +}; + +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 { + dev_link_t link; + dev_node_t node; + struct net_device_stats stats; + 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 void tc574_config(dev_link_t *link); +static void tc574_release(dev_link_t *link); +static int tc574_event(event_t event, int priority, + event_callback_args_t *args); + +static void mdio_sync(kio_addr_t ioaddr, int bits); +static int mdio_read(kio_addr_t ioaddr, int phy_id, int location); +static void mdio_write(kio_addr_t ioaddr, int phy_id, int location, int value); +static unsigned short read_eeprom(kio_addr_t 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 int el3_start_xmit(struct sk_buff *skb, struct net_device *dev); +static irqreturn_t el3_interrupt(int irq, void *dev_id, struct pt_regs *regs); +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 struct ethtool_ops netdev_ethtool_ops; +static void set_rx_mode(struct net_device *dev); + +static dev_info_t dev_info = "3c574_cs"; + +static dev_link_t *tc574_attach(void); +static void tc574_detach(dev_link_t *); + +static dev_link_t *dev_list; + +/* + tc574_attach() creates an "instance" of the driver, allocating + local data structures for one device. The device is registered + with Card Services. +*/ + +static dev_link_t *tc574_attach(void) +{ + struct el3_private *lp; + client_reg_t client_reg; + dev_link_t *link; + struct net_device *dev; + int ret; + + DEBUG(0, "3c574_attach()\n"); + + /* Create the PC card device object. */ + dev = alloc_etherdev(sizeof(struct el3_private)); + if (!dev) + return NULL; + lp = netdev_priv(dev); + link = &lp->link; + link->priv = dev; + + spin_lock_init(&lp->window_lock); + link->io.NumPorts1 = 32; + link->io.Attributes1 = IO_DATA_PATH_WIDTH_16; + link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT; + link->irq.IRQInfo1 = IRQ_LEVEL_ID; + link->irq.Handler = &el3_interrupt; + link->irq.Instance = dev; + link->conf.Attributes = CONF_ENABLE_IRQ; + link->conf.Vcc = 50; + link->conf.IntType = INT_MEMORY_AND_IO; + link->conf.ConfigIndex = 1; + link->conf.Present = PRESENT_OPTION; + + /* The EL3-specific entries in the device structure. */ + dev->hard_start_xmit = &el3_start_xmit; + dev->get_stats = &el3_get_stats; + dev->do_ioctl = &el3_ioctl; + SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops); + dev->set_multicast_list = &set_rx_mode; + dev->open = &el3_open; + dev->stop = &el3_close; +#ifdef HAVE_TX_TIMEOUT + dev->tx_timeout = el3_tx_timeout; + dev->watchdog_timeo = TX_TIMEOUT; +#endif + + /* Register with Card Services */ + link->next = dev_list; + dev_list = link; + client_reg.dev_info = &dev_info; + client_reg.EventMask = + CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL | + CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET | + CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME; + client_reg.event_handler = &tc574_event; + client_reg.Version = 0x0210; + client_reg.event_callback_args.client_data = link; + ret = pcmcia_register_client(&link->handle, &client_reg); + if (ret != 0) { + cs_error(link->handle, RegisterClient, ret); + tc574_detach(link); + return NULL; + } + + return 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(dev_link_t *link) +{ + struct net_device *dev = link->priv; + dev_link_t **linkp; + + DEBUG(0, "3c574_detach(0x%p)\n", link); + + /* Locate device structure */ + for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) + if (*linkp == link) break; + if (*linkp == NULL) + return; + + if (link->dev) + unregister_netdev(dev); + + if (link->state & DEV_CONFIG) + tc574_release(link); + + if (link->handle) + pcmcia_deregister_client(link->handle); + + /* Unlink device structure, free bits */ + *linkp = link->next; + 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. +*/ + +#define CS_CHECK(fn, ret) \ + do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0) + +static char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"}; + +static void tc574_config(dev_link_t *link) +{ + client_handle_t handle = link->handle; + struct net_device *dev = link->priv; + struct el3_private *lp = netdev_priv(dev); + tuple_t tuple; + cisparse_t parse; + unsigned short buf[32]; + int last_fn, last_ret, i, j; + kio_addr_t ioaddr; + u16 *phys_addr; + char *cardname; + union wn3_config config; + + phys_addr = (u16 *)dev->dev_addr; + + DEBUG(0, "3c574_config(0x%p)\n", link); + + tuple.Attributes = 0; + tuple.DesiredTuple = CISTPL_CONFIG; + CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); + tuple.TupleData = (cisdata_t *)buf; + tuple.TupleDataMax = 64; + tuple.TupleOffset = 0; + CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple)); + CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse)); + link->conf.ConfigBase = parse.config.base; + link->conf.Present = parse.config.rmask[0]; + + /* Configure card */ + link->state |= DEV_CONFIG; + + link->io.IOAddrLines = 16; + for (i = j = 0; j < 0x400; j += 0x20) { + link->io.BasePort1 = j ^ 0x300; + i = pcmcia_request_io(link->handle, &link->io); + if (i == CS_SUCCESS) break; + } + if (i != CS_SUCCESS) { + cs_error(link->handle, RequestIO, i); + goto failed; + } + CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq)); + CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf)); + + dev->irq = link->irq.AssignedIRQ; + dev->base_addr = link->io.BasePort1; + + 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. */ + tuple.DesiredTuple = 0x88; + if (pcmcia_get_first_tuple(handle, &tuple) == CS_SUCCESS) { + pcmcia_get_tuple_data(handle, &tuple); + for (i = 0; i < 3; i++) + phys_addr[i] = htons(buf[i]); + } else { + EL3WINDOW(0); + for (i = 0; i < 3; i++) + phys_addr[i] = htons(read_eeprom(ioaddr, i + 10)); + if (phys_addr[0] == 0x6060) { + printk(KERN_NOTICE "3c574_cs: IO port conflict at 0x%03lx" + "-0x%03lx\n", dev->base_addr, dev->base_addr+15); + goto failed; + } + } + tuple.DesiredTuple = CISTPL_VERS_1; + if (pcmcia_get_first_tuple(handle, &tuple) == CS_SUCCESS && + pcmcia_get_tuple_data(handle, &tuple) == CS_SUCCESS && + pcmcia_parse_tuple(handle, &tuple, &parse) == CS_SUCCESS) { + cardname = parse.version_1.str + parse.version_1.ofs[1]; + } else + cardname = "3Com 3c574"; + + { + u_char mcr; + outw(2<<11, ioaddr + RunnerRdCtrl); + mcr = inb(ioaddr + 2); + outw(0<<11, ioaddr + RunnerRdCtrl); + printk(KERN_INFO " ASIC rev %d,", mcr>>3); + EL3WINDOW(3); + config.i = inl(ioaddr + Wn3_Config); + lp->default_media = config.u.xcvr; + lp->autoselect = config.u.autoselect; + } + + 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; + DEBUG(0, " MII transceiver at index %d, status %x.\n", + phy, mii_status); + if ((mii_status & 0x0040) == 0) + mii_preamble_required = 1; + break; + } + } + if (phy > 32) { + printk(KERN_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); + } + } + + link->state &= ~DEV_CONFIG_PENDING; + link->dev = &lp->node; + SET_NETDEV_DEV(dev, &handle_to_dev(handle)); + + if (register_netdev(dev) != 0) { + printk(KERN_NOTICE "3c574_cs: register_netdev() failed\n"); + link->dev = NULL; + goto failed; + } + + strcpy(lp->node.dev_name, dev->name); + + printk(KERN_INFO "%s: %s at io %#3lx, irq %d, hw_addr ", + dev->name, cardname, dev->base_addr, dev->irq); + for (i = 0; i < 6; i++) + printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : ".\n")); + printk(" %dK FIFO split %s Rx:Tx, %sMII interface.\n", + 8 << config.u.ram_size, ram_split[config.u.ram_split], + config.u.autoselect ? "autoselect " : ""); + + return; + +cs_failed: + cs_error(link->handle, last_fn, last_ret); +failed: + tc574_release(link); + return; + +} /* 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(dev_link_t *link) +{ + DEBUG(0, "3c574_release(0x%p)\n", link); + + pcmcia_release_configuration(link->handle); + pcmcia_release_io(link->handle, &link->io); + pcmcia_release_irq(link->handle, &link->irq); + + link->state &= ~DEV_CONFIG; +} + +/* + The card status event handler. Mostly, this schedules other + stuff to run after an event is received. A CARD_REMOVAL event + also sets some flags to discourage the net drivers from trying + to talk to the card any more. +*/ + +static int tc574_event(event_t event, int priority, + event_callback_args_t *args) +{ + dev_link_t *link = args->client_data; + struct net_device *dev = link->priv; + + DEBUG(1, "3c574_event(0x%06x)\n", event); + + switch (event) { + case CS_EVENT_CARD_REMOVAL: + link->state &= ~DEV_PRESENT; + if (link->state & DEV_CONFIG) + netif_device_detach(dev); + break; + case CS_EVENT_CARD_INSERTION: + link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; + tc574_config(link); + break; + case CS_EVENT_PM_SUSPEND: + link->state |= DEV_SUSPEND; + /* Fall through... */ + case CS_EVENT_RESET_PHYSICAL: + if (link->state & DEV_CONFIG) { + if (link->open) + netif_device_detach(dev); + pcmcia_release_configuration(link->handle); + } + break; + case CS_EVENT_PM_RESUME: + link->state &= ~DEV_SUSPEND; + /* Fall through... */ + case CS_EVENT_CARD_RESET: + if (link->state & DEV_CONFIG) { + pcmcia_request_configuration(link->handle, &link->conf); + if (link->open) { + tc574_reset(dev); + netif_device_attach(dev); + } + } + break; + } + return 0; +} /* tc574_event */ + +static void dump_status(struct net_device *dev) +{ + kio_addr_t ioaddr = dev->base_addr; + EL3WINDOW(1); + printk(KERN_INFO " 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); + printk(KERN_INFO " 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) + printk(KERN_NOTICE "%s: command 0x%04x did not complete!\n", dev->name, 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(kio_addr_t 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(kio_addr_t ioaddr, int bits) +{ + kio_addr_t 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(kio_addr_t ioaddr, int phy_id, int location) +{ + int i; + int read_cmd = (0xf6 << 10) | (phy_id << 5) | location; + unsigned int retval = 0; + kio_addr_t 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(kio_addr_t ioaddr, int phy_id, int location, int value) +{ + int write_cmd = 0x50020000 | (phy_id << 23) | (location << 18) | value; + kio_addr_t 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); + } + + return; +} + +/* 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; + kio_addr_t 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 */ + int 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); + dev_link_t *link = &lp->link; + + if (!DEV_OK(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); + + DEBUG(2, "%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) +{ + struct el3_private *lp = netdev_priv(dev); + kio_addr_t ioaddr = dev->base_addr; + + printk(KERN_NOTICE "%s: Transmit timed out!\n", dev->name); + dump_status(dev); + lp->stats.tx_errors++; + dev->trans_start = jiffies; + /* 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) +{ + struct el3_private *lp = netdev_priv(dev); + kio_addr_t 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) { + DEBUG(1, "%s: transmit error: status 0x%02x\n", + dev->name, tx_status); + outw(TxEnable, ioaddr + EL3_CMD); + lp->stats.tx_aborted_errors++; + } + outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */ + } +} + +static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + kio_addr_t ioaddr = dev->base_addr; + struct el3_private *lp = netdev_priv(dev); + unsigned long flags; + + DEBUG(3, "%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); + outw(skb->len, ioaddr + TX_FIFO); + outw(0, ioaddr + TX_FIFO); + outsl(ioaddr + TX_FIFO, skb->data, (skb->len+3)>>2); + + dev->trans_start = jiffies; + + /* 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 0; +} + +/* The EL3 interrupt handler. */ +static irqreturn_t el3_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct net_device *dev = (struct net_device *) dev_id; + struct el3_private *lp = netdev_priv(dev); + kio_addr_t ioaddr; + unsigned status; + int work_budget = max_interrupt_work; + int handled = 0; + + if (!netif_device_present(dev)) + return IRQ_NONE; + ioaddr = dev->base_addr; + + DEBUG(3, "%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)) { + DEBUG(1, "%s: Interrupt from dead card\n", dev->name); + break; + } + + handled = 1; + + if (status & RxComplete) + work_budget = el3_rx(dev, work_budget); + + if (status & TxAvailable) { + DEBUG(3, " 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); + printk(KERN_NOTICE "%s: adapter failure, FIFO diagnostic" + " register %04x.\n", dev->name, 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) { + DEBUG(0, "%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); + } + + DEBUG(3, "%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); + kio_addr_t 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) + printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name); + el3_interrupt(dev->irq, lp, NULL); + 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) + printk(KERN_INFO "%s: %s link beat\n", dev->name, + (lp->media_status & 0x0004) ? "lost" : "found"); + if ((media ^ lp->media_status) & 0x0020) { + lp->partner = 0; + if (lp->media_status & 0x0020) { + printk(KERN_INFO "%s: autonegotiation restarted\n", + dev->name); + } else if (partner) { + partner &= lp->advertising; + lp->partner = partner; + printk(KERN_INFO "%s: autonegotiation complete: " + "%sbaseT-%cD selected\n", dev->name, + ((partner & 0x0180) ? "100" : "10"), + ((partner & 0x0140) ? 'F' : 'H')); + } else { + printk(KERN_INFO "%s: link partner did not autonegotiate\n", + dev->name); + } + + EL3WINDOW(3); + outb((partner & 0x0140 ? 0x20 : 0) | + (dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl); + EL3WINDOW(1); + + } + if (media & 0x0010) + printk(KERN_INFO "%s: remote fault detected\n", + dev->name); + if (media & 0x0002) + printk(KERN_INFO "%s: jabber detected\n", dev->name); + 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 &lp->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) +{ + struct el3_private *lp = netdev_priv(dev); + kio_addr_t ioaddr = dev->base_addr; + u8 rx, tx, up; + + DEBUG(2, "%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); + lp->stats.tx_carrier_errors += inb(ioaddr + 0); + lp->stats.tx_heartbeat_errors += inb(ioaddr + 1); + /* Multiple collisions. */ inb(ioaddr + 2); + lp->stats.collisions += inb(ioaddr + 3); + lp->stats.tx_window_errors += inb(ioaddr + 4); + lp->stats.rx_fifo_errors += inb(ioaddr + 5); + lp->stats.tx_packets += inb(ioaddr + 6); + up = inb(ioaddr + 9); + lp->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); + + lp->stats.tx_bytes += tx + ((up & 0xf0) << 12); + + EL3WINDOW(1); +} + +static int el3_rx(struct net_device *dev, int worklimit) +{ + struct el3_private *lp = netdev_priv(dev); + kio_addr_t ioaddr = dev->base_addr; + short rx_status; + + DEBUG(3, "%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)) { + if (rx_status & 0x4000) { /* Error, update stats. */ + short error = rx_status & 0x3800; + lp->stats.rx_errors++; + switch (error) { + case 0x0000: lp->stats.rx_over_errors++; break; + case 0x0800: lp->stats.rx_length_errors++; break; + case 0x1000: lp->stats.rx_frame_errors++; break; + case 0x1800: lp->stats.rx_length_errors++; break; + case 0x2000: lp->stats.rx_frame_errors++; break; + case 0x2800: lp->stats.rx_crc_errors++; break; + } + } else { + short pkt_len = rx_status & 0x7ff; + struct sk_buff *skb; + + skb = dev_alloc_skb(pkt_len+5); + + DEBUG(3, " Receiving packet size %d status %4.4x.\n", + pkt_len, rx_status); + if (skb != NULL) { + skb->dev = dev; + 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->last_rx = jiffies; + lp->stats.rx_packets++; + lp->stats.rx_bytes += pkt_len; + } else { + DEBUG(1, "%s: couldn't allocate a sk_buff of" + " size %d.\n", dev->name, pkt_len); + lp->stats.rx_dropped++; + } + } + tc574_wait_for_completion(dev, RxDiscard); + } + + return worklimit; +} + +static void netdev_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + strcpy(info->driver, "3c574_cs"); +} + +static struct ethtool_ops netdev_ethtool_ops = { + .get_drvinfo = netdev_get_drvinfo, +}; + +/* 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); + kio_addr_t ioaddr = dev->base_addr; + u16 *data = (u16 *)&rq->ifr_ifru; + int phy = lp->phys & 0x1f; + + DEBUG(2, "%s: In ioct(%-.6s, %#4.4x) %4.4x %4.4x %4.4x %4.4x.\n", + dev->name, rq->ifr_ifrn.ifrn_name, cmd, + data[0], data[1], data[2], data[3]); + + switch(cmd) { + case SIOCGMIIPHY: /* Get the address of the PHY in use. */ + data[0] = 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[3] = mdio_read(ioaddr, data[0] & 0x1f, data[1] & 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; + + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + spin_lock_irqsave(&lp->window_lock, flags); + saved_window = inw(ioaddr + EL3_CMD) >> 13; + EL3WINDOW(4); + mdio_write(ioaddr, data[0] & 0x1f, data[1] & 0x1f, data[2]); + 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) +{ + kio_addr_t ioaddr = dev->base_addr; + + if (dev->flags & IFF_PROMISC) + outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm, + ioaddr + EL3_CMD); + else if (dev->mc_count || (dev->flags & IFF_ALLMULTI)) + outw(SetRxFilter|RxStation|RxMulticast|RxBroadcast, ioaddr + EL3_CMD); + else + outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD); +} + +static int el3_close(struct net_device *dev) +{ + kio_addr_t ioaddr = dev->base_addr; + struct el3_private *lp = netdev_priv(dev); + dev_link_t *link = &lp->link; + + DEBUG(2, "%s: shutting down ethercard.\n", dev->name); + + if (DEV_OK(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); + } + + link->open--; + netif_stop_queue(dev); + del_timer_sync(&lp->media); + + return 0; +} + +static struct pcmcia_driver tc574_driver = { + .owner = THIS_MODULE, + .drv = { + .name = "3c574_cs", + }, + .attach = tc574_attach, + .detach = tc574_detach, +}; + +static int __init init_tc574(void) +{ + return pcmcia_register_driver(&tc574_driver); +} + +static void __exit exit_tc574(void) +{ + pcmcia_unregister_driver(&tc574_driver); + BUG_ON(dev_list != NULL); +} + +module_init(init_tc574); +module_exit(exit_tc574); |