/*====================================================================== A PCMCIA ethernet driver for the 3com 3c589 card. Copyright (C) 1998 David A. Hinds -- dhinds@hyper.stanford.edu 3c589_cs.c 1.128 1999/07/30 15:17:50 The network driver code is based on Donald Becker's 3c589 code: Written 1994 by Donald Becker. Copyright 1993 United States Government as represented by the Director, National Security Agency. This software may be used and distributed according to the terms of the GNU Public License, incorporated herein by reference. Donald Becker may be reached at becker@cesdis1.gsfc.nasa.gov ======================================================================*/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* To minimize the size of the driver source I only define operating constants if they are used several times. You'll need the manual if you want to understand driver details. */ /* Offsets from base I/O address. */ #define EL3_DATA 0x00 #define EL3_TIMER 0x0a #define EL3_CMD 0x0e #define EL3_STATUS 0x0e #define EEPROM_READ 0x0080 #define EEPROM_BUSY 0x8000 #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 c509cmd { 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 c509status { 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 }; /* Register window 1 offsets, the window used in normal operation. */ #define TX_FIFO 0x00 #define RX_FIFO 0x00 #define RX_STATUS 0x08 #define TX_STATUS 0x0B #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */ #define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */ #define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */ #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */ #define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */ /* Time in jiffies before concluding Tx hung */ #define TX_TIMEOUT ((400*HZ)/1000) struct el3_private { dev_node_t node; struct net_device_stats stats; /* For transceiver monitoring */ struct timer_list media; u_short media_status; u_short fast_poll; u_long last_irq; }; static char *if_names[] = { "auto", "10baseT", "10base2", "AUI" }; #ifdef PCMCIA_DEBUG static int pc_debug = PCMCIA_DEBUG; MODULE_PARM(pc_debug, "i"); #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args) static char *version = "3c589_cs.c 1.128 1999/07/30 15:17:50 (David Hinds)"; #else #define DEBUG(n, args...) #endif /*====================================================================*/ /* Parameters that can be set with 'insmod' */ /* Special hook for setting if_port when module is loaded */ static int if_port = 0; /* Bit map of interrupts to choose from */ static u_int irq_mask = 0xdeb8; static int irq_list[4] = { -1 }; MODULE_PARM(if_port, "i"); MODULE_PARM(irq_mask, "i"); MODULE_PARM(irq_list, "1-4i"); /*====================================================================*/ static void tc589_config(dev_link_t *link); static void tc589_release(u_long arg); static int tc589_event(event_t event, int priority, event_callback_args_t *args); static ushort read_eeprom(short ioaddr, int index); static void tc589_reset(struct device *dev); static void media_check(u_long arg); static int el3_config(struct device *dev, struct ifmap *map); static int el3_open(struct device *dev); static int el3_start_xmit(struct sk_buff *skb, struct device *dev); static void el3_interrupt IRQ(int irq, void *dev_id, struct pt_regs *regs); static void update_stats(int addr, struct device *dev); static struct net_device_stats *el3_get_stats(struct device *dev); static int el3_rx(struct device *dev); static int el3_close(struct device *dev); static void set_multicast_list(struct device *dev); static dev_info_t dev_info = "3c589_cs"; static dev_link_t *tc589_attach(void); static void tc589_detach(dev_link_t *); static dev_link_t *dev_list = NULL; /*====================================================================== This bit of code is used to avoid unregistering network devices at inappropriate times. 2.2 and later kernels are fairly picky about when this can happen. ======================================================================*/ static void flush_stale_links(void) { dev_link_t *link, *next; for (link = dev_list; link; link = next) { next = link->next; if (link->state & DEV_STALE_LINK) tc589_detach(link); } } /*====================================================================*/ static void cs_error(client_handle_t handle, int func, int ret) { error_info_t err = { func, ret }; CardServices(ReportError, handle, &err); } /*====================================================================== We never need to do anything when a tc589 device is "initialized" by the net software, because we only register already-found cards. ======================================================================*/ static int tc589_init(struct device *dev) { return 0; } /*====================================================================== tc589_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 *tc589_attach(void) { client_reg_t client_reg; dev_link_t *link; struct device *dev; int i, ret; DEBUG(0, "3c589_attach()\n"); flush_stale_links(); /* Create new ethernet device */ link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL); memset(link, 0, sizeof(struct dev_link_t)); link->release.function = &tc589_release; link->release.data = (u_long)link; link->io.NumPorts1 = 16; link->io.Attributes1 = IO_DATA_PATH_WIDTH_16; link->io.IOAddrLines = 4; link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT; link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID; if (irq_list[0] == -1) link->irq.IRQInfo2 = irq_mask; else for (i = 0; i < 4; i++) link->irq.IRQInfo2 |= 1 << irq_list[i]; link->irq.Handler = &el3_interrupt; 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; dev = kmalloc(sizeof(struct device), GFP_KERNEL); memset(dev, 0, sizeof(struct device)); /* Make up a EL3-specific-data structure. */ dev->priv = kmalloc(sizeof(struct el3_private), GFP_KERNEL); memset(dev->priv, 0, sizeof(struct el3_private)); /* The EL3-specific entries in the device structure. */ dev->hard_start_xmit = &el3_start_xmit; dev->set_config = &el3_config; dev->get_stats = &el3_get_stats; dev->set_multicast_list = &set_multicast_list; ether_setup(dev); dev->name = ((struct el3_private *)dev->priv)->node.dev_name; dev->init = &tc589_init; dev->open = &el3_open; dev->stop = &el3_close; dev->tbusy = 1; link->priv = link->irq.Instance = dev; /* Register with Card Services */ link->next = dev_list; dev_list = link; client_reg.dev_info = &dev_info; client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE; 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 = &tc589_event; client_reg.Version = 0x0210; client_reg.event_callback_args.client_data = link; ret = CardServices(RegisterClient, &link->handle, &client_reg); if (ret != 0) { cs_error(link->handle, RegisterClient, ret); tc589_detach(link); return NULL; } return link; } /* tc589_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 tc589_detach(dev_link_t *link) { dev_link_t **linkp; long flags; DEBUG(0, "3c589_detach(0x%p)\n", link); /* Locate device structure */ for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) if (*linkp == link) break; if (*linkp == NULL) return; save_flags(flags); cli(); if (link->state & DEV_RELEASE_PENDING) { del_timer(&link->release); link->state &= ~DEV_RELEASE_PENDING; } restore_flags(flags); if (link->state & DEV_CONFIG) { tc589_release((u_long)link); if (link->state & DEV_STALE_CONFIG) { link->state |= DEV_STALE_LINK; return; } } if (link->handle) CardServices(DeregisterClient, link->handle); /* Unlink device structure, free bits */ *linkp = link->next; if (link->priv) { struct device *dev = link->priv; if (link->dev != NULL) unregister_netdev(dev); if (dev->priv) kfree_s(dev->priv, sizeof(struct el3_private)); kfree_s(link->priv, sizeof(struct device)); } kfree_s(link, sizeof(struct dev_link_t)); } /* tc589_detach */ /*====================================================================== tc589_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, args...) \ while ((last_ret=CardServices(last_fn=(fn), args))!=0) goto cs_failed static void tc589_config(dev_link_t *link) { client_handle_t handle; struct device *dev; tuple_t tuple; cisparse_t parse; u_short buf[32]; int last_fn, last_ret, i, j, multi = 0; short ioaddr, *phys_addr; char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"}; handle = link->handle; dev = link->priv; phys_addr = (short *)dev->dev_addr; DEBUG(0, "3c589_config(0x%p)\n", link); tuple.Attributes = 0; tuple.DesiredTuple = CISTPL_CONFIG; CS_CHECK(GetFirstTuple, handle, &tuple); tuple.TupleData = (cisdata_t *)buf; tuple.TupleDataMax = sizeof(buf); tuple.TupleOffset = 0; CS_CHECK(GetTupleData, handle, &tuple); CS_CHECK(ParseTuple, handle, &tuple, &parse); link->conf.ConfigBase = parse.config.base; link->conf.Present = parse.config.rmask[0]; /* Is this a 3c562? */ tuple.DesiredTuple = CISTPL_MANFID; tuple.Attributes = TUPLE_RETURN_COMMON; if ((CardServices(GetFirstTuple, handle, &tuple) == CS_SUCCESS) && (CardServices(GetTupleData, handle, &tuple) == CS_SUCCESS)) { if (le16_to_cpu(buf[0]) != MANFID_3COM) printk(KERN_INFO "3c589_cs: hmmm, is this really a " "3Com card??\n"); multi = (le16_to_cpu(buf[1]) == PRODID_3COM_3C562); } /* Configure card */ link->state |= DEV_CONFIG; /* For the 3c562, the base address must be xx00-xx7f */ for (i = j = 0; j < 0x400; j += 0x10) { if (multi && (j & 0x80)) continue; link->io.BasePort1 = j ^ 0x300; i = CardServices(RequestIO, link->handle, &link->io); if (i == CS_SUCCESS) break; } if (i != CS_SUCCESS) { cs_error(link->handle, RequestIO, i); goto failed; } CS_CHECK(RequestIRQ, link->handle, &link->irq); CS_CHECK(RequestConfiguration, link->handle, &link->conf); dev->irq = link->irq.AssignedIRQ; dev->base_addr = link->io.BasePort1; dev->tbusy = 0; if (register_netdev(dev) != 0) { printk(KERN_NOTICE "3c589_cs: register_netdev() failed\n"); goto failed; } link->state &= ~DEV_CONFIG_PENDING; ioaddr = dev->base_addr; EL3WINDOW(0); /* The 3c589 has an extra EEPROM for configuration info, including the hardware address. The 3c562 puts the address in the CIS. */ tuple.DesiredTuple = 0x88; if (CardServices(GetFirstTuple, handle, &tuple) == CS_SUCCESS) { CardServices(GetTupleData, handle, &tuple); for (i = 0; i < 3; i++) phys_addr[i] = htons(buf[i]); } else { for (i = 0; i < 3; i++) phys_addr[i] = htons(read_eeprom(ioaddr, i)); if (phys_addr[0] == 0x6060) { printk(KERN_NOTICE "3c589_cs: IO port conflict at 0x%03lx" "-0x%03lx\n", dev->base_addr, dev->base_addr+15); goto failed; } } link->dev = &((struct el3_private *)dev->priv)->node; /* The address and resource configuration register aren't loaded from the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */ outw(0x3f00, ioaddr + 8); /* The if_port symbol can be set when the module is loaded */ if ((if_port >= 0) && (if_port <= 3)) dev->if_port = if_port; else printk(KERN_NOTICE "3c589_cs: invalid if_port requested\n"); printk(KERN_INFO "%s: 3Com 3c%s, io %#3lx, irq %d, hw_addr ", dev->name, (multi ? "562" : "589"), dev->base_addr, dev->irq); for (i = 0; i < 6; i++) printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "\n")); i = inl(ioaddr); printk(KERN_INFO " %dK FIFO split %s Rx:Tx, %s xcvr\n", (i & 7) ? 32 : 8, ram_split[(i >> 16) & 3], if_names[dev->if_port]); return; cs_failed: cs_error(link->handle, last_fn, last_ret); failed: tc589_release((u_long)link); return; } /* tc589_config */ /*====================================================================== After a card is removed, tc589_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 tc589_release(u_long arg) { dev_link_t *link = (dev_link_t *)arg; DEBUG(0, "3c589_release(0x%p)\n", link); if (link->open) { DEBUG(1, "3c589_cs: release postponed, '%s' still open\n", link->dev->dev_name); link->state |= DEV_STALE_CONFIG; return; } CardServices(ReleaseConfiguration, link->handle); CardServices(ReleaseIO, link->handle, &link->io); CardServices(ReleaseIRQ, link->handle, &link->irq); link->state &= ~(DEV_CONFIG | DEV_RELEASE_PENDING); } /* tc589_release */ /*====================================================================== 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 tc589_event(event_t event, int priority, event_callback_args_t *args) { dev_link_t *link = args->client_data; struct device *dev = link->priv; DEBUG(1, "3c589_event(0x%06x)\n", event); switch (event) { case CS_EVENT_CARD_REMOVAL: link->state &= ~DEV_PRESENT; if (link->state & DEV_CONFIG) { dev->tbusy = 1; dev->start = 0; link->release.expires = RUN_AT(HZ/20); add_timer(&link->release); } break; case CS_EVENT_CARD_INSERTION: link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; tc589_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) { dev->tbusy = 1; dev->start = 0; } CardServices(ReleaseConfiguration, link->handle); } break; case CS_EVENT_PM_RESUME: link->state &= ~DEV_SUSPEND; /* Fall through... */ case CS_EVENT_CARD_RESET: if (link->state & DEV_CONFIG) { CardServices(RequestConfiguration, link->handle, &link->conf); if (link->open) { tc589_reset(dev); dev->tbusy = 0; dev->start = 1; } } break; } return 0; } /* tc589_event */ /*====================================================================*/ /* Use this for commands that may take time to finish */ static void wait_for_completion(struct device *dev, int cmd) { int i = 100; 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 ushort read_eeprom(short ioaddr, int index) { int i; outw(EEPROM_READ + index, ioaddr + 10); /* Reading the eeprom takes 162 us */ for (i = 1620; i >= 0; i--) if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0) break; return inw(ioaddr + 12); } /* Set transceiver type, perhaps to something other than what the user specified in dev->if_port. */ static void tc589_set_xcvr(struct device *dev, int if_port) { struct el3_private *lp = (struct el3_private *)dev->priv; ushort ioaddr = dev->base_addr; EL3WINDOW(0); switch (if_port) { case 0: case 1: outw(0, ioaddr + 6); break; case 2: outw(3<<14, ioaddr + 6); break; case 3: outw(1<<14, ioaddr + 6); break; } /* On PCMCIA, this just turns on the LED */ outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD); /* 10baseT interface, enable link beat and jabber check. */ EL3WINDOW(4); outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA); EL3WINDOW(1); if (if_port == 2) lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000); else lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800); } static void dump_status(struct device *dev) { int 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+RX_STATUS), inb(ioaddr+TX_STATUS), inw(ioaddr+TX_FREE)); 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); } /* Reset and restore all of the 3c589 registers. */ static void tc589_reset(struct device *dev) { ushort ioaddr = dev->base_addr; int i; EL3WINDOW(0); outw(0x0001, ioaddr + 4); /* Activate board. */ outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */ /* Set the station address in window 2. */ EL3WINDOW(2); for (i = 0; i < 6; i++) outb(dev->dev_addr[i], ioaddr + i); tc589_set_xcvr(dev, dev->if_port); /* Switch to the stats window, and clear all stats by reading. */ outw(StatsDisable, ioaddr + EL3_CMD); EL3WINDOW(6); for (i = 0; i < 9; i++) inb(ioaddr+i); inw(ioaddr + 10); inw(ioaddr + 12); /* Switch to register set 1 for normal use. */ EL3WINDOW(1); /* Accept b-cast and phys addr only. */ outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD); 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, ioaddr + EL3_CMD); } static int el3_config(struct device *dev, struct ifmap *map) { if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) { if (map->port <= 3) { dev->if_port = map->port; printk(KERN_INFO "%s: switched to %s port\n", dev->name, if_names[dev->if_port]); tc589_set_xcvr(dev, dev->if_port); } else return -EINVAL; } return 0; } static int el3_open(struct device *dev) { struct el3_private *lp = (struct el3_private *)dev->priv; dev_link_t *link; for (link = dev_list; link; link = link->next) if (link->priv == dev) break; if (!DEV_OK(link)) return -ENODEV; link->open++; MOD_INC_USE_COUNT; dev->interrupt = 0; dev->tbusy = 0; dev->start = 1; tc589_reset(dev); lp->media.function = &media_check; lp->media.data = (u_long)dev; lp->media.expires = RUN_AT(HZ); add_timer(&lp->media); DEBUG(1, "%s: opened, status %4.4x.\n", dev->name, inw(dev->base_addr + EL3_STATUS)); return 0; /* Always succeed */ } static void el3_tx_timeout(struct device *dev) { struct el3_private *lp = (struct el3_private *)dev->priv; int 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. */ wait_for_completion(dev, TxReset); outw(TxEnable, ioaddr + EL3_CMD); dev->tbusy = 0; } static void pop_tx_status(struct device *dev) { struct el3_private *lp = (struct el3_private *)dev->priv; int ioaddr = dev->base_addr; int i; /* Clear the Tx status stack. */ for (i = 32; i > 0; i--) { u_char tx_status = inb(ioaddr + TX_STATUS); if (!(tx_status & 0x84)) break; /* reset transmitter on jabber error or underrun */ if (tx_status & 0x30) 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 + TX_STATUS); /* Pop the status stack. */ } } static int el3_start_xmit(struct sk_buff *skb, struct device *dev) { struct el3_private *lp = (struct el3_private *)dev->priv; int ioaddr = dev->base_addr; /* Transmitter timeout, serious problems. */ if (dev->tbusy) { if (jiffies - dev->trans_start < TX_TIMEOUT) return 1; el3_tx_timeout(dev); } #if (LINUX_VERSION_CODE < VERSION(2,1,25)) if (skb == NULL) { dev_tint(dev); return 0; } if (skb->len <= 0) return 0; #endif DEBUG(3, "%s: el3_start_xmit(length = %ld) called, " "status %4.4x.\n", dev->name, (long)skb->len, inw(ioaddr + EL3_STATUS)); /* Avoid timer-based retransmission conflicts. */ if (test_and_set_bit(0, (void*)&dev->tbusy) != 0) printk(KERN_NOTICE "%s: transmitter access conflict.\n", dev->name); else { #if (LINUX_VERSION_CODE >= VERSION(2,1,25)) lp->stats.tx_bytes += skb->len; #endif /* Put out the doubleword header... */ outw(skb->len, ioaddr + TX_FIFO); outw(0x00, ioaddr + TX_FIFO); /* ... and the packet rounded to a doubleword. */ outsl_ns(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2); dev->trans_start = jiffies; if (inw(ioaddr + TX_FREE) > 1536) { dev->tbusy = 0; } else /* Interrupt us when the FIFO has room for max-sized packet. */ outw(SetTxThreshold + 1536, ioaddr + EL3_CMD); } DEV_KFREE_SKB(skb); pop_tx_status(dev); return 0; } /* The EL3 interrupt handler. */ static void el3_interrupt IRQ(int irq, void *dev_id, struct pt_regs *regs) { struct device *dev = (struct device *)DEV_ID; struct el3_private *lp; int ioaddr, status; int i = 0; if ((dev == NULL) || !dev->start) return; lp = (struct el3_private *)dev->priv; ioaddr = dev->base_addr; #ifdef PCMCIA_DEBUG if (dev->interrupt) { printk(KERN_NOTICE "%s: re-entering the interrupt handler.\n", dev->name); return; } dev->interrupt = 1; DEBUG(3, "%s: interrupt, status %4.4x.\n", dev->name, inw(ioaddr + EL3_STATUS)); #endif while ((status = inw(ioaddr + EL3_STATUS)) & (IntLatch | RxComplete | StatsFull)) { if ((dev->start == 0) || ((status & 0xe000) != 0x2000)) { DEBUG(1, "%s: interrupt from dead card\n", dev->name); break; } if (status & RxComplete) el3_rx(dev); 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); dev->tbusy = 0; mark_bh(NET_BH); } if (status & TxComplete) pop_tx_status(dev); if (status & (AdapterFailure | RxEarly | StatsFull)) { /* Handle all uncommon interrupts. */ if (status & StatsFull) /* Empty statistics. */ update_stats(ioaddr, dev); if (status & RxEarly) { /* Rx early is unused. */ el3_rx(dev); outw(AckIntr | RxEarly, ioaddr + EL3_CMD); } if (status & AdapterFailure) { u16 fifo_diag; EL3WINDOW(4); fifo_diag = inw(ioaddr + 4); EL3WINDOW(1); printk(KERN_NOTICE "%s: adapter failure, FIFO diagnostic" " register %04x.\n", dev->name, fifo_diag); if (fifo_diag & 0x0400) { /* Tx overrun */ wait_for_completion(dev, TxReset); outw(TxEnable, ioaddr + EL3_CMD); } if (fifo_diag & 0x2000) { /* Rx underrun */ wait_for_completion(dev, RxReset); set_multicast_list(dev); outw(RxEnable, ioaddr + EL3_CMD); } outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD); } } if (++i > 10) { printk(KERN_NOTICE "%s: infinite loop 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); } lp->last_irq = jiffies; #ifdef PCMCIA_DEBUG DEBUG(3, "%s: exiting interrupt, status %4.4x.\n", dev->name, inw(ioaddr + EL3_STATUS)); dev->interrupt = 0; #endif return; } static void media_check(u_long arg) { struct device *dev = (struct device *)(arg); struct el3_private *lp = (struct el3_private *)dev->priv; int ioaddr = dev->base_addr; u_short media, errs; u_long flags; if (dev->start == 0) goto reschedule; EL3WINDOW(1); /* 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 + EL3_TIMER) == 0xff)) { if (!lp->fast_poll) printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name); el3_interrupt IRQ(dev->irq, dev, NULL); lp->fast_poll = HZ; } if (lp->fast_poll) { lp->fast_poll--; lp->media.expires = RUN_AT(2); add_timer(&lp->media); return; } save_flags(flags); cli(); EL3WINDOW(4); media = inw(ioaddr+WN4_MEDIA) & 0xc810; /* Ignore collisions unless we've had no irq's recently */ if (jiffies - lp->last_irq < HZ) { media &= ~0x0010; } else { /* Try harder to detect carrier errors */ EL3WINDOW(6); outw(StatsDisable, ioaddr + EL3_CMD); errs = inb(ioaddr + 0); outw(StatsEnable, ioaddr + EL3_CMD); lp->stats.tx_carrier_errors += errs; if (errs || (lp->media_status & 0x0010)) media |= 0x0010; } if (media != lp->media_status) { if ((media & lp->media_status & 0x8000) && ((lp->media_status ^ media) & 0x0800)) printk(KERN_INFO "%s: %s link beat\n", dev->name, (lp->media_status & 0x0800 ? "lost" : "found")); else if ((media & lp->media_status & 0x4000) && ((lp->media_status ^ media) & 0x0010)) printk(KERN_INFO "%s: coax cable %s\n", dev->name, (lp->media_status & 0x0010 ? "ok" : "problem")); if (dev->if_port == 0) { if (media & 0x8000) { if (media & 0x0800) printk(KERN_INFO "%s: flipped to 10baseT\n", dev->name); else tc589_set_xcvr(dev, 2); } else if (media & 0x4000) { if (media & 0x0010) tc589_set_xcvr(dev, 1); else printk(KERN_INFO "%s: flipped to 10base2\n", dev->name); } } lp->media_status = media; } EL3WINDOW(1); restore_flags(flags); reschedule: lp->media.expires = RUN_AT(HZ); add_timer(&lp->media); } static struct net_device_stats *el3_get_stats(struct device *dev) { struct el3_private *lp = (struct el3_private *)dev->priv; unsigned long flags; dev_link_t *link; for (link = dev_list; link; link = link->next) if (link->priv == dev) break; if (DEV_OK(link)) { save_flags(flags); cli(); update_stats(dev->base_addr, dev); restore_flags(flags); } return &lp->stats; } /* Update statistics. We change to register window 6, so this should be run single-threaded if the device is active. This is expected to be a rare operation, and it's simpler for the rest of the driver to assume that window 1 is always valid rather than use a special window-state variable. */ static void update_stats(int ioaddr, struct device *dev) { struct el3_private *lp = (struct el3_private *)dev->priv; DEBUG(2, "%s: updating the statistics.\n", dev->name); /* Turn off statistics updates while reading. */ outw(StatsDisable, ioaddr + EL3_CMD); /* 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); /* Rx packets */ inb(ioaddr + 7); /* Tx deferrals */ inb(ioaddr + 8); inw(ioaddr + 10); /* Total Rx and Tx octets. */ inw(ioaddr + 12); /* Back to window 1, and turn statistics back on. */ EL3WINDOW(1); outw(StatsEnable, ioaddr + EL3_CMD); } static int el3_rx(struct device *dev) { struct el3_private *lp = (struct el3_private *)dev->priv; int ioaddr = dev->base_addr; int worklimit = 32; 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+RX_STATUS)); while (!((rx_status = inw(ioaddr + RX_STATUS)) & 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_ns(ioaddr+RX_FIFO, skb_put(skb, pkt_len), (pkt_len+3)>>2); skb->protocol = eth_type_trans(skb, dev); netif_rx(skb); lp->stats.rx_packets++; #if (LINUX_VERSION_CODE >= VERSION(2,1,25)) lp->stats.rx_bytes += skb->len; #endif } else { DEBUG(1, "%s: couldn't allocate a sk_buff of" " size %d.\n", dev->name, pkt_len); lp->stats.rx_dropped++; } } /* Pop the top of the Rx FIFO */ wait_for_completion(dev, RxDiscard); } if (worklimit == 0) printk(KERN_NOTICE "%s: too much work in el3_rx!\n", dev->name); return 0; } /* Set or clear the multicast filter for this adapter. num_addrs == -1 Promiscuous mode, receive all packets num_addrs == 0 Normal mode, clear multicast list num_addrs > 0 Multicast mode, receive normal and MC packets, and do best-effort filtering. */ static void set_multicast_list(struct device *dev) { short ioaddr = dev->base_addr; dev_link_t *link; for (link = dev_list; link; link = link->next) if (link->priv == dev) break; if (!(DEV_OK(link))) return; #ifdef PCMCIA_DEBUG if (pc_debug > 2) { static int old = 0; if (old != dev->mc_count) { old = dev->mc_count; DEBUG(0, "%s: setting Rx mode to %d addresses.\n", dev->name, old); } } #endif 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 device *dev) { int ioaddr = dev->base_addr; dev_link_t *link; for (link = dev_list; link; link = link->next) if (link->priv == dev) break; if (link == NULL) return -ENODEV; DEBUG(1, "%s: shutting down ethercard.\n", dev->name); if (DEV_OK(link)) { /* 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); if (dev->if_port == 2) /* Turn off thinnet power. Green! */ outw(StopCoax, ioaddr + EL3_CMD); else if (dev->if_port == 1) { /* Disable link beat and jabber */ EL3WINDOW(4); outw(0, ioaddr + WN4_MEDIA); } /* Switching back to window 0 disables the IRQ. */ EL3WINDOW(0); /* But we explicitly zero the IRQ line select anyway. */ outw(0x0f00, ioaddr + WN0_IRQ); /* Check if the card still exists */ if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000) update_stats(ioaddr, dev); } link->open--; dev->start = 0; del_timer(&((struct el3_private *)dev->priv)->media); if (link->state & DEV_STALE_CONFIG) { link->release.expires = RUN_AT(HZ/20); link->state |= DEV_RELEASE_PENDING; add_timer(&link->release); } MOD_DEC_USE_COUNT; return 0; } /*====================================================================*/ int init_module(void) { servinfo_t serv; DEBUG(0, "%s\n", version); CardServices(GetCardServicesInfo, &serv); if (serv.Revision != CS_RELEASE_CODE) { printk(KERN_NOTICE "3c589_cs: Card Services release " "does not match!\n"); return -1; } register_pcmcia_driver(&dev_info, &tc589_attach, &tc589_detach); return 0; } void cleanup_module(void) { DEBUG(0, "3c589_cs: unloading\n"); unregister_pcmcia_driver(&dev_info); while (dev_list != NULL) tc589_detach(dev_list); }