diff options
author | Ralf Baechle <ralf@linux-mips.org> | 1997-01-07 02:33:00 +0000 |
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committer | <ralf@linux-mips.org> | 1997-01-07 02:33:00 +0000 |
commit | beb116954b9b7f3bb56412b2494b562f02b864b1 (patch) | |
tree | 120e997879884e1b9d93b265221b939d2ef1ade1 /drivers/net/3c59x.c | |
parent | 908d4681a1dc3792ecafbe64265783a86c4cccb6 (diff) |
Import of Linux/MIPS 2.1.14
Diffstat (limited to 'drivers/net/3c59x.c')
-rw-r--r-- | drivers/net/3c59x.c | 1167 |
1 files changed, 1167 insertions, 0 deletions
diff --git a/drivers/net/3c59x.c b/drivers/net/3c59x.c new file mode 100644 index 000000000..0b6a7f000 --- /dev/null +++ b/drivers/net/3c59x.c @@ -0,0 +1,1167 @@ +/* 3c59x.c: A 3Com 3c590/3c595 "Vortex" ethernet driver for linux. */ +/* + Written 1995 by Donald Becker. + + This software may be used and distributed according to the terms + of the GNU Public License, incorporated herein by reference. + + This driver is for the 3Com "Vortex" series ethercards. Members of + the series include the 3c590 PCI EtherLink III and 3c595-Tx PCI Fast + EtherLink. + + The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O + Center of Excellence in Space Data and Information Sciences + Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771 +*/ + +static char *version = "3c59x.c:v0.25 5/17/96 becker@cesdis.gsfc.nasa.gov\n"; + +/* "Knobs" that turn on special features. */ +/* Enable the experimental automatic media selection code. */ +#define AUTOMEDIA 1 + +/* Allow the use of bus master transfers instead of programmed-I/O for the + Tx process. Bus master transfers are always disabled by default, but + iff this is set they may be turned on using 'options'. */ +#define VORTEX_BUS_MASTER + +#include <linux/module.h> + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/string.h> +#include <linux/ptrace.h> +#include <linux/errno.h> +#include <linux/in.h> +#include <linux/ioport.h> +#include <linux/malloc.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/bios32.h> +#include <linux/timer.h> +#include <asm/bitops.h> +#include <asm/io.h> + +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> + +#define RUN_AT(x) (jiffies + (x)) +#define DEV_ALLOC_SKB(len) dev_alloc_skb(len + 2) + +#define FREE_IRQ(irqnum, dev) free_irq(irqnum, dev) +#define REQUEST_IRQ(i,h,f,n, instance) request_irq(i,h,f,n, instance) +#define IRQ(irq, dev_id, pt_regs) (irq, dev_id, pt_regs) + +/* "Knobs" for adjusting internal parameters. */ +/* Put out somewhat more debugging messages. (0 - no msg, 1 minimal msgs). */ +#define VORTEX_DEBUG 2 + +/* Number of times to check to see if the Tx FIFO has space, used in some + limited cases. */ +#define WAIT_TX_AVAIL 200 + +/* Operational parameter that usually are not changed. */ +#define TX_TIMEOUT 40 /* Time in jiffies before concluding Tx hung */ + +/* The total size is twice that of the original EtherLinkIII series: the + runtime register window, window 1, is now always mapped in. */ +#define VORTEX_TOTAL_SIZE 0x20 + +#ifdef HAVE_DEVLIST +struct netdev_entry tc59x_drv = +{"Vortex", vortex_pci_probe, VORTEX_TOTAL_SIZE, NULL}; +#endif + +#ifdef VORTEX_DEBUG +int vortex_debug = VORTEX_DEBUG; +#else +int vortex_debug = 1; +#endif + +static int product_ids[] = {0x5900, 0x5950, 0x5951, 0x5952, 0, 0}; +static const char *product_names[] = { + "3c590 Vortex 10Mbps", + "3c595 Vortex 100baseTX", + "3c595 Vortex 100baseT4", + "3c595 Vortex 100base-MII", + "EISA Vortex 3c597", +}; +#define DEMON_INDEX 5 /* Caution! Must be consistent with above! */ + +/* + Theory of Operation + +I. Board Compatibility + +This device driver is designed for the 3Com FastEtherLink, 3Com's PCI to +10/100baseT adapter. It also works with the 3c590, a similar product +with only a 10Mbs interface. + +II. Board-specific settings + +PCI bus devices are configured by the system at boot time, so no jumpers +need to be set on the board. The system BIOS should be set to assign the +PCI INTA signal to an otherwise unused system IRQ line. While it's +physically possible to shared PCI interrupt lines, the 1.2.0 kernel doesn't +support it. + +III. Driver operation + +The 3c59x series use an interface that's very similar to the previous 3c5x9 +series. The primary interface is two programmed-I/O FIFOs, with an +alternate single-contiguous-region bus-master transfer (see next). + +One extension that is advertised in a very large font is that the adapters +are capable of being bus masters. Unfortunately this capability is only for +a single contiguous region making it less useful than the list of transfer +regions available with the DEC Tulip or AMD PCnet. Given the significant +performance impact of taking an extra interrupt for each transfer, using +DMA transfers is a win only with large blocks. + +IIIC. Synchronization +The driver runs as two independent, single-threaded flows of control. One +is the send-packet routine, which enforces single-threaded use by the +dev->tbusy flag. The other thread is the interrupt handler, which is single +threaded by the hardware and other software. + +IV. Notes + +Thanks to Cameron Spitzer and Terry Murphy of 3Com for providing both +3c590 and 3c595 boards. +The name "Vortex" is the internal 3Com project name for the PCI ASIC, and +the EISA version is called "Demon". According to Terry these names come +from rides at the local amusement park. + +The new chips support both ethernet (1.5K) and FDDI (4.5K) packet sizes! +This driver only supports ethernet packets because of the skbuff allocation +limit of 4K. +*/ + +#define TCOM_VENDOR_ID 0x10B7 /* 3Com's manufacturer's ID. */ + +/* Operational definitions. + These are not used by other compilation units and thus are not + exported in a ".h" file. + + First the windows. There are eight register windows, with the command + and status registers available in each. + */ +#define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD) +#define EL3_CMD 0x0e +#define EL3_STATUS 0x0e + +/* The top five bits written to EL3_CMD are a command, the lower + 11 bits are the parameter, if applicable. + Note that 11 parameters bits was fine for ethernet, but the new chip + can handle FDDI length frames (~4500 octets) and now parameters count + 32-bit 'Dwords' rather than octets. */ + +enum vortex_cmd { + 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, + StartDMAUp = 20<<11, StartDMADown = (20<<11)+1, StatsEnable = 21<<11, + StatsDisable = 22<<11, StopCoax = 23<<11,}; + +/* The SetRxFilter command accepts the following classes: */ +enum RxFilter { + RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8 }; + +/* Bits in the general status register. */ +enum vortex_status { + IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004, + TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020, + IntReq = 0x0040, StatsFull = 0x0080, DMADone = 1<<8, + DMAInProgress = 1<<11, /* DMA controller is still busy.*/ + CmdInProgress = 1<<12, /* EL3_CMD is still busy.*/ +}; + +/* Register window 1 offsets, the window used in normal operation. + On the Vortex this window is always mapped at offsets 0x10-0x1f. */ +enum Window1 { + TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14, + RxStatus = 0x18, Timer=0x1A, TxStatus = 0x1B, + TxFree = 0x1C, /* Remaining free bytes in Tx buffer. */ +}; +enum Window0 { + Wn0EepromCmd = 10, /* Window 0: EEPROM command register. */ + Wn0EepromData = 12, /* Window 0: EEPROM results register. */ +}; +enum Win0_EEPROM_bits { + EEPROM_Read = 0x80, EEPROM_WRITE = 0x40, EEPROM_ERASE = 0xC0, + EEPROM_EWENB = 0x30, /* Enable erasing/writing for 10 msec. */ + EEPROM_EWDIS = 0x00, /* Disable EWENB before 10 msec timeout. */ +}; +/* EEPROM locations. */ +enum eeprom_offset { + PhysAddr01=0, PhysAddr23=1, PhysAddr45=2, ModelID=3, + EtherLink3ID=7, IFXcvrIO=8, IRQLine=9, + NodeAddr01=10, NodeAddr23=11, NodeAddr45=12, + DriverTune=13, Checksum=15}; + +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 pad24:8; + } u; +}; + +enum Window4 { + Wn4_Media = 0x0A, /* Window 4: Various transcvr/media bits. */ +}; +enum Win4_Media_bits { + Media_SQE = 0x0008, /* Enable SQE error counting for AUI. */ + Media_10TP = 0x00C0, /* Enable link beat and jabber for 10baseT. */ + Media_Lnk = 0x0080, /* Enable just link beat for 100TX/100FX. */ + Media_LnkBeat = 0x0800, +}; +enum Window7 { /* Window 7: Bus Master control. */ + Wn7_MasterAddr = 0, Wn7_MasterLen = 6, Wn7_MasterStatus = 12, +}; + +struct vortex_private { + char devname[8]; /* "ethN" string, also for kernel debug. */ + const char *product_name; + struct device *next_module; + struct enet_statistics stats; + struct sk_buff *tx_skb; /* Packet being eaten by bus master ctrl. */ + struct timer_list timer; /* Media selection timer. */ + int options; /* User-settable misc. driver options. */ + int last_rx_packets; /* For media autoselection. */ + unsigned int available_media:8, /* From Wn3_Options */ + media_override:3, /* Passed-in media type. */ + default_media:3, /* Read from the EEPROM. */ + full_duplex:1, bus_master:1, autoselect:1; +}; + +/* The action to take with a media selection timer tick. + Note that we deviate from the 3Com order by checking 10base2 before AUI. + */ +static struct media_table { + char *name; + unsigned int media_bits:16, /* Bits to set in Wn4_Media register. */ + mask:8, /* The transceiver-present bit in Wn3_Config.*/ + next:8; /* The media type to try next. */ + short wait; /* Time before we check media status. */ +} media_tbl[] = { + { "10baseT", Media_10TP,0x08, 3 /* 10baseT->10base2 */, (14*HZ)/10}, + { "10Mbs AUI", Media_SQE, 0x20, 8 /* AUI->default */, (1*HZ)/10}, + { "undefined", 0, 0x80, 0 /* Undefined */, 0}, + { "10base2", 0, 0x10, 1 /* 10base2->AUI. */, (1*HZ)/10}, + { "100baseTX", Media_Lnk, 0x02, 5 /* 100baseTX->100baseFX */, (14*HZ)/10}, + { "100baseFX", Media_Lnk, 0x04, 6 /* 100baseFX->MII */, (14*HZ)/10}, + { "MII", 0, 0x40, 0 /* MII->10baseT */, (14*HZ)/10}, + { "undefined", 0, 0x01, 0 /* Undefined/100baseT4 */, 0}, + { "Default", 0, 0xFF, 0 /* Use default */, 0}, +}; + +static int vortex_scan(struct device *dev); +static int vortex_found_device(struct device *dev, int ioaddr, int irq, + int product_index, int options); +static int vortex_probe1(struct device *dev); +static int vortex_open(struct device *dev); +static void vortex_timer(unsigned long arg); +static int vortex_start_xmit(struct sk_buff *skb, struct device *dev); +static int vortex_rx(struct device *dev); +static void vortex_interrupt IRQ(int irq, void *dev_id, struct pt_regs *regs); +static int vortex_close(struct device *dev); +static void update_stats(int addr, struct device *dev); +static struct enet_statistics *vortex_get_stats(struct device *dev); +static void set_rx_mode(struct device *dev); + + +/* Unlike the other PCI cards the 59x cards don't need a large contiguous + memory region, so making the driver a loadable module is feasible. + + Unfortunately maximizing the shared code between the integrated and + module version of the driver results in a complicated set of initialization + procedures. + init_module() -- modules / tc59x_init() -- built-in + The wrappers for vortex_scan() + vortex_scan() The common routine that scans for PCI and EISA cards + vortex_found_device() Allocate a device structure when we find a card. + Different versions exist for modules and built-in. + vortex_probe1() Fill in the device structure -- this is separated + so that the modules code can put it in dev->init. +*/ +/* This driver uses 'options' to pass the media type, full-duplex flag, etc. */ +/* Note: this is the only limit on the number of cards supported!! */ +static int options[8] = { -1, -1, -1, -1, -1, -1, -1, -1,}; + +#ifdef MODULE +static int debug = -1; +/* A list of all installed Vortex devices, for removing the driver module. */ +static struct device *root_vortex_dev = NULL; + +int +init_module(void) +{ + int cards_found; + + if (debug >= 0) + vortex_debug = debug; + if (vortex_debug) + printk(version); + + root_vortex_dev = NULL; + cards_found = vortex_scan(0); + return cards_found ? 0 : -ENODEV; +} + +#else +int tc59x_probe(struct device *dev) +{ + int cards_found = 0; + + cards_found = vortex_scan(dev); + + if (vortex_debug > 0 && cards_found) + printk(version); + + return cards_found ? 0 : -ENODEV; +} +#endif /* not MODULE */ + +static int vortex_scan(struct device *dev) +{ + int cards_found = 0; + + if (pcibios_present()) { + static int pci_index = 0; + static int board_index = 0; + for (; product_ids[board_index]; board_index++, pci_index = 0) { + for (; pci_index < 16; pci_index++) { + unsigned char pci_bus, pci_device_fn, pci_irq_line; + unsigned char pci_latency; + unsigned int pci_ioaddr; + unsigned short pci_command; + + if (pcibios_find_device(TCOM_VENDOR_ID, + product_ids[board_index], pci_index, + &pci_bus, &pci_device_fn)) + break; + pcibios_read_config_byte(pci_bus, pci_device_fn, + PCI_INTERRUPT_LINE, &pci_irq_line); + pcibios_read_config_dword(pci_bus, pci_device_fn, + PCI_BASE_ADDRESS_0, &pci_ioaddr); + /* Remove I/O space marker in bit 0. */ + pci_ioaddr &= ~3; + +#ifdef VORTEX_BUS_MASTER + /* Get and check the bus-master and latency values. + Some PCI BIOSes fail to set the master-enable bit, and + the latency timer must be set to the maximum value to avoid + data corruption that occurs when the timer expires during + a transfer. Yes, it's a bug. */ + pcibios_read_config_word(pci_bus, pci_device_fn, + PCI_COMMAND, &pci_command); + if ( ! (pci_command & PCI_COMMAND_MASTER)) { + printk(" PCI Master Bit has not been set! Setting...\n"); + pci_command |= PCI_COMMAND_MASTER; + pcibios_write_config_word(pci_bus, pci_device_fn, + PCI_COMMAND, pci_command); + } + pcibios_read_config_byte(pci_bus, pci_device_fn, + PCI_LATENCY_TIMER, &pci_latency); + if (pci_latency != 255) { + printk(" Overriding PCI latency timer (CFLT) setting of" + " %d, new value is 255.\n", pci_latency); + pcibios_write_config_byte(pci_bus, pci_device_fn, + PCI_LATENCY_TIMER, 255); + } +#endif /* VORTEX_BUS_MASTER */ + vortex_found_device(dev, pci_ioaddr, pci_irq_line, board_index, + dev && dev->mem_start ? dev->mem_start + : options[cards_found]); + dev = 0; + cards_found++; + } + } + } + + /* Now check all slots of the EISA bus. */ + if (EISA_bus) { + static int ioaddr = 0x1000; + for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) { + /* Check the standard EISA ID register for an encoded '3Com'. */ + if (inw(ioaddr + 0xC80) != 0x6d50) + continue; + /* Check for a product that we support, 3c59{2,7} any rev. */ + if ((inw(ioaddr + 0xC82) & 0xF0FF) != 0x7059 /* 597 */ + && (inw(ioaddr + 0xC82) & 0xF0FF) != 0x2059) /* 592 */ + continue; + vortex_found_device(dev, ioaddr, inw(ioaddr + 0xC88) >> 12, + DEMON_INDEX, dev && dev->mem_start + ? dev->mem_start : options[cards_found]); + dev = 0; + cards_found++; + } + } + + return cards_found; +} + +static int vortex_found_device(struct device *dev, int ioaddr, int irq, + int product_index, int options) +{ + struct vortex_private *vp; + +#ifdef MODULE + /* Allocate and fill new device structure. */ + int dev_size = sizeof(struct device) + + sizeof(struct vortex_private); + + dev = (struct device *) kmalloc(dev_size, GFP_KERNEL); + memset(dev, 0, dev_size); + dev->priv = ((void *)dev) + sizeof(struct device); + vp = (struct vortex_private *)dev->priv; + dev->name = vp->devname; /* An empty string. */ + dev->base_addr = ioaddr; + dev->irq = irq; + dev->init = vortex_probe1; + vp->product_name = product_names[product_index]; + vp->options = options; + if (options >= 0) { + vp->media_override = ((options & 7) == 2) ? 0 : options & 7; + vp->full_duplex = (options & 8) ? 1 : 0; + vp->bus_master = (options & 16) ? 1 : 0; + } else { + vp->media_override = 7; + vp->full_duplex = 0; + vp->bus_master = 0; + } + ether_setup(dev); + vp->next_module = root_vortex_dev; + root_vortex_dev = dev; + if (register_netdev(dev) != 0) + return -EIO; +#else /* not a MODULE */ + if (dev) { + dev->priv = kmalloc(sizeof (struct vortex_private), GFP_KERNEL); + memset(dev->priv, 0, sizeof (struct vortex_private)); + } + dev = init_etherdev(dev, sizeof(struct vortex_private)); + dev->base_addr = ioaddr; + dev->irq = irq; + vp = (struct vortex_private *)dev->priv; + vp->product_name = product_names[product_index]; + vp->options = options; + if (options >= 0) { + vp->media_override = ((options & 7) == 2) ? 0 : options & 7; + vp->full_duplex = (options & 8) ? 1 : 0; + vp->bus_master = (options & 16) ? 1 : 0; + } else { + vp->media_override = 7; + vp->full_duplex = 0; + vp->bus_master = 0; + } + + vortex_probe1(dev); +#endif /* MODULE */ + return 0; +} + +static int vortex_probe1(struct device *dev) +{ + int ioaddr = dev->base_addr; + struct vortex_private *vp = (struct vortex_private *)dev->priv; + int i; + + printk("%s: 3Com %s at %#3x,", dev->name, + vp->product_name, ioaddr); + + /* Read the station address from the EEPROM. */ + EL3WINDOW(0); + for (i = 0; i < 3; i++) { + short *phys_addr = (short *)dev->dev_addr; + int timer; + outw(EEPROM_Read + PhysAddr01 + i, ioaddr + Wn0EepromCmd); + /* Pause for at least 162 us. for the read to take place. */ + for (timer = 162*4 + 400; timer >= 0; timer--) { + SLOW_DOWN_IO; + if ((inw(ioaddr + Wn0EepromCmd) & 0x8000) == 0) + break; + } + phys_addr[i] = htons(inw(ioaddr + Wn0EepromData)); + } + for (i = 0; i < 6; i++) + printk("%c%2.2x", i ? ':' : ' ', dev->dev_addr[i]); + printk(", IRQ %d\n", dev->irq); + /* Tell them about an invalid IRQ. */ + if (vortex_debug && (dev->irq <= 0 || dev->irq > 15)) + printk(" *** Warning: this IRQ is unlikely to work!\n"); + + { + char *ram_split[] = {"5:3", "3:1", "1:1", "invalid"}; + union wn3_config config; + EL3WINDOW(3); + vp->available_media = inw(ioaddr + Wn3_Options); + config.i = inl(ioaddr + Wn3_Config); + if (vortex_debug > 1) + printk(" Internal config register is %4.4x, transceivers %#x.\n", + config.i, inw(ioaddr + Wn3_Options)); + printk(" %dK %s-wide RAM %s Rx:Tx split, %s%s interface.\n", + 8 << config.u.ram_size, + config.u.ram_width ? "word" : "byte", + ram_split[config.u.ram_split], + config.u.autoselect ? "autoselect/" : "", + media_tbl[config.u.xcvr].name); + dev->if_port = config.u.xcvr; + vp->default_media = config.u.xcvr; + vp->autoselect = config.u.autoselect; + } + + /* We do a request_region() only to register /proc/ioports info. */ + request_region(ioaddr, VORTEX_TOTAL_SIZE, vp->product_name); + + /* The 3c59x-specific entries in the device structure. */ + dev->open = &vortex_open; + dev->hard_start_xmit = &vortex_start_xmit; + dev->stop = &vortex_close; + dev->get_stats = &vortex_get_stats; + dev->set_multicast_list = &set_rx_mode; + + return 0; +} + + +static int +vortex_open(struct device *dev) +{ + int ioaddr = dev->base_addr; + struct vortex_private *vp = (struct vortex_private *)dev->priv; + union wn3_config config; + int i; + + /* Before initializing select the active media port. */ + EL3WINDOW(3); + if (vp->full_duplex) + outb(0x20, ioaddr + Wn3_MAC_Ctrl); /* Set the full-duplex bit. */ + config.i = inl(ioaddr + Wn3_Config); + + if (vp->media_override != 7) { + if (vortex_debug > 1) + printk("%s: Media override to transceiver %d (%s).\n", + dev->name, vp->media_override, + media_tbl[vp->media_override].name); + dev->if_port = vp->media_override; + } else if (vp->autoselect) { + /* Find first available media type, starting with 100baseTx. */ + dev->if_port = 4; + while (! (vp->available_media & media_tbl[dev->if_port].mask)) + dev->if_port = media_tbl[dev->if_port].next; + + if (vortex_debug > 1) + printk("%s: Initial media type %s.\n", + dev->name, media_tbl[dev->if_port].name); + + init_timer(&vp->timer); + vp->timer.expires = RUN_AT(media_tbl[dev->if_port].wait); + vp->timer.data = (unsigned long)dev; + vp->timer.function = &vortex_timer; /* timer handler */ + add_timer(&vp->timer); + } else + dev->if_port = vp->default_media; + + config.u.xcvr = dev->if_port; + outl(config.i, ioaddr + Wn3_Config); + + if (vortex_debug > 1) { + printk("%s: vortex_open() InternalConfig %8.8x.\n", + dev->name, config.i); + } + + outw(TxReset, ioaddr + EL3_CMD); + for (i = 20; i >= 0 ; i--) + if ( ! inw(ioaddr + EL3_STATUS) & CmdInProgress) + break; + + outw(RxReset, ioaddr + EL3_CMD); + /* Wait a few ticks for the RxReset command to complete. */ + for (i = 20; i >= 0 ; i--) + if ( ! inw(ioaddr + EL3_STATUS) & CmdInProgress) + break; + + outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD); + + /* Use the now-standard shared IRQ implementation. */ + if (request_irq(dev->irq, &vortex_interrupt, SA_SHIRQ, + vp->product_name, dev)) { + return -EAGAIN; + } + + if (vortex_debug > 1) { + EL3WINDOW(4); + printk("%s: vortex_open() irq %d media status %4.4x.\n", + dev->name, dev->irq, inw(ioaddr + Wn4_Media)); + } + + /* Set the station address and mask in window 2 each time opened. */ + EL3WINDOW(2); + for (i = 0; i < 6; i++) + outb(dev->dev_addr[i], ioaddr + i); + for (; i < 12; i+=2) + outw(0, ioaddr + i); + + if (dev->if_port == 3) + /* Start the thinnet transceiver. We should really wait 50ms...*/ + outw(StartCoax, ioaddr + EL3_CMD); + EL3WINDOW(4); + outw((inw(ioaddr + Wn4_Media) & ~(Media_10TP|Media_SQE)) | + media_tbl[dev->if_port].media_bits, ioaddr + Wn4_Media); + + /* 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); + /* New: On the Vortex we must also clear the BadSSD counter. */ + EL3WINDOW(4); + inb(ioaddr + 12); + + /* Switch to register set 7 for normal use. */ + EL3WINDOW(7); + + /* Set receiver mode: presumably accept b-case and phys addr only. */ + set_rx_mode(dev); + outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */ + + dev->tbusy = 0; + dev->interrupt = 0; + dev->start = 1; + + 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 + | DMADone, ioaddr + EL3_CMD); + + MOD_INC_USE_COUNT; + + return 0; +} + +static void vortex_timer(unsigned long data) +{ +#ifdef AUTOMEDIA + struct device *dev = (struct device *)data; + struct vortex_private *vp = (struct vortex_private *)dev->priv; + int ioaddr = dev->base_addr; + unsigned long flags; + int ok = 0; + + if (vortex_debug > 1) + printk("%s: Media selection timer tick happened, %s.\n", + dev->name, media_tbl[dev->if_port].name); + + save_flags(flags); cli(); { + int old_window = inw(ioaddr + EL3_CMD) >> 13; + int media_status; + EL3WINDOW(4); + media_status = inw(ioaddr + Wn4_Media); + switch (dev->if_port) { + case 0: case 4: case 5: /* 10baseT, 100baseTX, 100baseFX */ + if (media_status & Media_LnkBeat) { + ok = 1; + if (vortex_debug > 1) + printk("%s: Media %s has link beat, %x.\n", + dev->name, media_tbl[dev->if_port].name, media_status); + } else if (vortex_debug > 1) + printk("%s: Media %s is has no link beat, %x.\n", + dev->name, media_tbl[dev->if_port].name, media_status); + + break; + default: /* Other media types handled by Tx timeouts. */ + if (vortex_debug > 1) + printk("%s: Media %s is has no indication, %x.\n", + dev->name, media_tbl[dev->if_port].name, media_status); + ok = 1; + } + if ( ! ok) { + union wn3_config config; + + do { + dev->if_port = media_tbl[dev->if_port].next; + } while ( ! (vp->available_media & media_tbl[dev->if_port].mask)); + if (dev->if_port == 8) { /* Go back to default. */ + dev->if_port = vp->default_media; + if (vortex_debug > 1) + printk("%s: Media selection failing, using default %s port.\n", + dev->name, media_tbl[dev->if_port].name); + } else { + if (vortex_debug > 1) + printk("%s: Media selection failed, now trying %s port.\n", + dev->name, media_tbl[dev->if_port].name); + vp->timer.expires = RUN_AT(media_tbl[dev->if_port].wait); + add_timer(&vp->timer); + } + outw((media_status & ~(Media_10TP|Media_SQE)) | + media_tbl[dev->if_port].media_bits, ioaddr + Wn4_Media); + + EL3WINDOW(3); + config.i = inl(ioaddr + Wn3_Config); + config.u.xcvr = dev->if_port; + outl(config.i, ioaddr + Wn3_Config); + + outw(dev->if_port == 3 ? StartCoax : StopCoax, ioaddr + EL3_CMD); + } + EL3WINDOW(old_window); + } restore_flags(flags); + if (vortex_debug > 1) + printk("%s: Media selection timer finished, %s.\n", + dev->name, media_tbl[dev->if_port].name); + +#endif /* AUTOMEDIA*/ + return; +} + +static int +vortex_start_xmit(struct sk_buff *skb, struct device *dev) +{ + struct vortex_private *vp = (struct vortex_private *)dev->priv; + int ioaddr = dev->base_addr; + + /* Part of the following code is inspired by code from Giuseppe Ciaccio, + ciaccio@disi.unige.it. + It works around a ?bug? in the 8K Vortex that only occurs on some + systems: the TxAvailable interrupt seems to be lost. + The ugly work-around is to busy-wait for room available in the Tx + buffer before deciding the transmitter is actually hung. + This busy-wait should never really occur, since the problem is that + there actually *is* room in the Tx FIFO. + + This pointed out an optimization -- we can ignore dev->tbusy if + we actually have room for this packet. + */ + +#if 0 + /* unstable optimization */ + if (inw(ioaddr + TxFree) > skb->len) /* We actually have free room. */ + dev->tbusy = 0; /* Fake out the check below. */ + else +#endif + if (dev->tbusy) { + /* Transmitter timeout, serious problems. */ + int tickssofar = jiffies - dev->trans_start; + int i; + + if (tickssofar < 2) /* We probably aren't empty. */ + return 1; + /* Wait a while to see if there really is room. */ + for (i = WAIT_TX_AVAIL; i >= 0; i--) + if (inw(ioaddr + TxFree) > skb->len) + break; + if ( i < 0) { + if (tickssofar < TX_TIMEOUT) + return 1; + printk("%s: transmit timed out, tx_status %2.2x status %4.4x.\n", + dev->name, inb(ioaddr + TxStatus), inw(ioaddr + EL3_STATUS)); + /* Issue TX_RESET and TX_START commands. */ + outw(TxReset, ioaddr + EL3_CMD); + for (i = 20; i >= 0 ; i--) + if ( ! inw(ioaddr + EL3_STATUS) & CmdInProgress) break; + outw(TxEnable, ioaddr + EL3_CMD); + dev->trans_start = jiffies; + dev->tbusy = 0; + vp->stats.tx_errors++; + vp->stats.tx_dropped++; + return 0; /* Yes, silently *drop* the packet! */ + } + dev->tbusy = 0; + } + + /* Block a timer-based transmit from overlapping. This could better be + done with atomic_swap(1, dev->tbusy), but set_bit() works as well. + If this ever occurs the queue layer is doing something evil! */ + if (set_bit(0, (void*)&dev->tbusy) != 0) { + printk("%s: Transmitter access conflict.\n", dev->name); + return 1; + } + + /* Put out the doubleword header... */ + outl(skb->len, ioaddr + TX_FIFO); +#ifdef VORTEX_BUS_MASTER + if (vp->bus_master) { + /* Set the bus-master controller to transfer the packet. */ + outl((int)(skb->data), ioaddr + Wn7_MasterAddr); + outw((skb->len + 3) & ~3, ioaddr + Wn7_MasterLen); + vp->tx_skb = skb; + outw(StartDMADown, ioaddr + EL3_CMD); + /* dev->tbusy will be cleared at the DMADone interrupt. */ + } else { + /* ... and the packet rounded to a doubleword. */ + outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2); + dev_kfree_skb (skb, FREE_WRITE); + if (inw(ioaddr + TxFree) > 1536) { + dev->tbusy = 0; + } else + /* Interrupt us when the FIFO has room for max-sized packet. */ + outw(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD); + } +#else + /* ... and the packet rounded to a doubleword. */ + outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2); + dev_kfree_skb (skb, FREE_WRITE); + if (inw(ioaddr + TxFree) > 1536) { + dev->tbusy = 0; + } else + /* Interrupt us when the FIFO has room for max-sized packet. */ + outw(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD); +#endif /* bus master */ + + dev->trans_start = jiffies; + + /* Clear the Tx status stack. */ + { + short tx_status; + int i = 4; + + while (--i > 0 && (tx_status = inb(ioaddr + TxStatus)) > 0) { + if (tx_status & 0x3C) { /* A Tx-disabling error occurred. */ + if (vortex_debug > 2) + printk("%s: Tx error, status %2.2x.\n", + dev->name, tx_status); + if (tx_status & 0x04) vp->stats.tx_fifo_errors++; + if (tx_status & 0x38) vp->stats.tx_aborted_errors++; + if (tx_status & 0x30) { + int j; + outw(TxReset, ioaddr + EL3_CMD); + for (j = 20; j >= 0 ; j--) + if ( ! inw(ioaddr + EL3_STATUS) & CmdInProgress) + break; + } + outw(TxEnable, ioaddr + EL3_CMD); + } + outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */ + } + } + return 0; +} + +/* The interrupt handler does all of the Rx thread work and cleans up + after the Tx thread. */ +static void vortex_interrupt IRQ(int irq, void *dev_id, struct pt_regs *regs) +{ + /* Use the now-standard shared IRQ implementation. */ + struct device *dev = dev_id; + struct vortex_private *lp; + int ioaddr, status; + int latency; + int i = 0; + + if (dev->interrupt) + printk("%s: Re-entering the interrupt handler.\n", dev->name); + dev->interrupt = 1; + + ioaddr = dev->base_addr; + latency = inb(ioaddr + Timer); + lp = (struct vortex_private *)dev->priv; + + status = inw(ioaddr + EL3_STATUS); + + if (vortex_debug > 4) + printk("%s: interrupt, status %4.4x, timer %d.\n", dev->name, + status, latency); + if ((status & 0xE000) != 0xE000) { + static int donedidthis=0; + /* Some interrupt controllers store a bogus interrupt from boot-time. + Ignore a single early interrupt, but don't hang the machine for + other interrupt problems. */ + if (donedidthis++ > 1) { + printk("%s: Bogus interrupt, bailing. Status %4.4x, start=%d.\n", + dev->name, status, dev->start); + FREE_IRQ(dev->irq, dev); + } + } + + do { + if (vortex_debug > 5) + printk("%s: In interrupt loop, status %4.4x.\n", + dev->name, status); + if (status & RxComplete) + vortex_rx(dev); + + if (status & TxAvailable) { + if (vortex_debug > 5) + printk(" 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); + } +#ifdef VORTEX_BUS_MASTER + if (status & DMADone) { + outw(0x1000, ioaddr + Wn7_MasterStatus); /* Ack the event. */ + dev->tbusy = 0; + mark_bh(NET_BH); + } +#endif + if (status & (AdapterFailure | RxEarly | StatsFull)) { + /* Handle all uncommon interrupts at once. */ + if (status & RxEarly) { /* Rx early is unused. */ + vortex_rx(dev); + outw(AckIntr | RxEarly, ioaddr + EL3_CMD); + } + if (status & StatsFull) { /* Empty statistics. */ + static int DoneDidThat = 0; + if (vortex_debug > 4) + printk("%s: Updating stats.\n", dev->name); + update_stats(ioaddr, dev); + /* DEBUG HACK: Disable statistics as an interrupt source. */ + /* This occurs when we have the wrong media type! */ + if (DoneDidThat == 0 && + inw(ioaddr + EL3_STATUS) & StatsFull) { + int win, reg; + printk("%s: Updating stats failed, disabling stats as an" + " interrupt source.\n", dev->name); + for (win = 0; win < 8; win++) { + EL3WINDOW(win); + printk("\n Vortex window %d:", win); + for (reg = 0; reg < 16; reg++) + printk(" %2.2x", inb(ioaddr+reg)); + } + EL3WINDOW(7); + outw(SetIntrEnb | 0x18, ioaddr + EL3_CMD); + DoneDidThat++; + } + } + if (status & AdapterFailure) { + /* Adapter failure requires Rx reset and reinit. */ + outw(RxReset, ioaddr + EL3_CMD); + /* Set the Rx filter to the current state. */ + set_rx_mode(dev); + outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */ + outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD); + } + } + + if (++i > 10) { + printk("%s: Infinite loop in interrupt, status %4.4x. " + "Disabling functions (%4.4x).\n", + dev->name, status, SetStatusEnb | ((~status) & 0xFE)); + /* Disable all pending interrupts. */ + outw(SetStatusEnb | ((~status) & 0xFE), ioaddr + EL3_CMD); + outw(AckIntr | 0xFF, ioaddr + EL3_CMD); + break; + } + /* Acknowledge the IRQ. */ + outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD); + + } while ((status = inw(ioaddr + EL3_STATUS)) & (IntLatch | RxComplete)); + + if (vortex_debug > 4) + printk("%s: exiting interrupt, status %4.4x.\n", dev->name, status); + + dev->interrupt = 0; + return; +} + +static int +vortex_rx(struct device *dev) +{ + struct vortex_private *vp = (struct vortex_private *)dev->priv; + int ioaddr = dev->base_addr; + int i; + short rx_status; + + if (vortex_debug > 5) + printk(" In rx_packet(), status %4.4x, rx_status %4.4x.\n", + inw(ioaddr+EL3_STATUS), inw(ioaddr+RxStatus)); + while ((rx_status = inw(ioaddr + RxStatus)) > 0) { + if (rx_status & 0x4000) { /* Error, update stats. */ + unsigned char rx_error = inb(ioaddr + RxErrors); + if (vortex_debug > 4) + printk(" Rx error: status %2.2x.\n", rx_error); + vp->stats.rx_errors++; + if (rx_error & 0x01) vp->stats.rx_over_errors++; + if (rx_error & 0x02) vp->stats.rx_length_errors++; + if (rx_error & 0x04) vp->stats.rx_frame_errors++; + if (rx_error & 0x08) vp->stats.rx_crc_errors++; + if (rx_error & 0x10) vp->stats.rx_length_errors++; + } else { + /* The packet length: up to 4.5K!. */ + short pkt_len = rx_status & 0x1fff; + struct sk_buff *skb; + + skb = DEV_ALLOC_SKB(pkt_len + 5); + if (vortex_debug > 4) + printk("Receiving packet size %d status %4.4x.\n", + pkt_len, rx_status); + if (skb != NULL) { + skb->dev = dev; + skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ + /* 'skb_put()' points to the start of sk_buff data area. */ + insl(ioaddr + RX_FIFO, skb_put(skb, pkt_len), + (pkt_len + 3) >> 2); + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */ + /* Wait a limited time to go to next packet. */ + for (i = 200; i >= 0; i--) + if ( ! inw(ioaddr + EL3_STATUS) & CmdInProgress) + break; + vp->stats.rx_packets++; + continue; + } else if (vortex_debug) + printk("%s: Couldn't allocate a sk_buff of size %d.\n", + dev->name, pkt_len); + } + vp->stats.rx_dropped++; + outw(RxDiscard, ioaddr + EL3_CMD); + /* Wait a limited time to skip this packet. */ + for (i = 200; i >= 0; i--) + if ( ! inw(ioaddr + EL3_STATUS) & CmdInProgress) + break; + } + + return 0; +} + +static int +vortex_close(struct device *dev) +{ + struct vortex_private *vp = (struct vortex_private *)dev->priv; + int ioaddr = dev->base_addr; + + dev->start = 0; + dev->tbusy = 1; + + if (vortex_debug > 1) + printk("%s: vortex_close() status %4.4x, Tx status %2.2x.\n", + dev->name, inw(ioaddr + EL3_STATUS), inb(ioaddr + TxStatus)); + + del_timer(&vp->timer); + + /* 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 == 3) + /* Turn off thinnet power. Green! */ + outw(StopCoax, ioaddr + EL3_CMD); + + FREE_IRQ(dev->irq, dev); + + update_stats(ioaddr, dev); + MOD_DEC_USE_COUNT; + + return 0; +} + +static struct enet_statistics * +vortex_get_stats(struct device *dev) +{ + struct vortex_private *vp = (struct vortex_private *)dev->priv; + unsigned long flags; + + save_flags(flags); + cli(); + update_stats(dev->base_addr, dev); + restore_flags(flags); + return &vp->stats; +} + +/* Update statistics. + Unlike with the EL3 we need not worry about interrupts changing + the window setting from underneath us, but we must still guard + against a race condition with a StatsUpdate interrupt updating the + table. This is done by checking that the ASM (!) code generated uses + atomic updates with '+='. + */ +static void update_stats(int ioaddr, struct device *dev) +{ + struct vortex_private *vp = (struct vortex_private *)dev->priv; + + /* Unlike the 3c5x9 we need not turn off stats updates while reading. */ + /* Switch to the stats window, and read everything. */ + EL3WINDOW(6); + vp->stats.tx_carrier_errors += inb(ioaddr + 0); + vp->stats.tx_heartbeat_errors += inb(ioaddr + 1); + /* Multiple collisions. */ inb(ioaddr + 2); + vp->stats.collisions += inb(ioaddr + 3); + vp->stats.tx_window_errors += inb(ioaddr + 4); + vp->stats.rx_fifo_errors += inb(ioaddr + 5); + vp->stats.tx_packets += inb(ioaddr + 6); + vp->stats.tx_packets += (inb(ioaddr + 9)&0x30) << 4; + /* Rx packets */ inb(ioaddr + 7); /* Must read to clear */ + /* Tx deferrals */ inb(ioaddr + 8); + /* Don't bother with register 9, an extension of registers 6&7. + If we do use the 6&7 values the atomic update assumption above + is invalid. */ + inw(ioaddr + 10); /* Total Rx and Tx octets. */ + inw(ioaddr + 12); + /* New: On the Vortex we must also clear the BadSSD counter. */ + EL3WINDOW(4); + inb(ioaddr + 12); + + /* We change back to window 7 (not 1) with the Vortex. */ + EL3WINDOW(7); + return; +} + +/* This new version of set_rx_mode() supports v1.4 kernels. + The Vortex chip has no documented multicast filter, so the only + multicast setting is to receive all multicast frames. At least + the chip has a very clean way to set the mode, unlike many others. */ +static void +set_rx_mode(struct device *dev) +{ + short ioaddr = dev->base_addr; + short new_mode; + + if (dev->flags & IFF_PROMISC) { + if (vortex_debug > 3) + printk("%s: Setting promiscuous mode.\n", dev->name); + new_mode = SetRxFilter|RxStation|RxMulticast|RxBroadcast|RxProm; + } else if ((dev->mc_list) || (dev->flags & IFF_ALLMULTI)) { + new_mode = SetRxFilter|RxStation|RxMulticast|RxBroadcast; + } else + new_mode = SetRxFilter | RxStation | RxBroadcast; + + outw(new_mode, ioaddr + EL3_CMD); +} + +#ifdef MODULE +void +cleanup_module(void) +{ + struct device *next_dev; + + /* No need to check MOD_IN_USE, as sys_delete_module() checks. */ + while (root_vortex_dev) { + next_dev = ((struct vortex_private *)root_vortex_dev->priv)->next_module; + unregister_netdev(root_vortex_dev); + outw(TotalReset, root_vortex_dev->base_addr + EL3_CMD); + release_region(root_vortex_dev->base_addr, VORTEX_TOTAL_SIZE); + kfree(root_vortex_dev); + root_vortex_dev = next_dev; + } +} +#endif /* MODULE */ + +/* + * Local variables: + * compile-command: "gcc -DMODULE -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 3c59x.c -o ../../modules/3c59x.o" + * c-indent-level: 4 + * tab-width: 4 + * End: + */ |