diff options
Diffstat (limited to 'drivers/net/ethernet/3com/3c515.c')
| -rw-r--r-- | drivers/net/ethernet/3com/3c515.c | 1584 |
1 files changed, 1584 insertions, 0 deletions
diff --git a/drivers/net/ethernet/3com/3c515.c b/drivers/net/ethernet/3com/3c515.c new file mode 100644 index 00000000000..d2bb4b254c5 --- /dev/null +++ b/drivers/net/ethernet/3com/3c515.c @@ -0,0 +1,1584 @@ +/* + Written 1997-1998 by Donald Becker. + + This software may be used and distributed according to the terms + of the GNU General Public License, incorporated herein by reference. + + This driver is for the 3Com ISA EtherLink XL "Corkscrew" 3c515 ethercard. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation + 410 Severn Ave., Suite 210 + Annapolis MD 21403 + + + 2000/2/2- Added support for kernel-level ISAPnP + by Stephen Frost <sfrost@snowman.net> and Alessandro Zummo + Cleaned up for 2.3.x/softnet by Jeff Garzik and Alan Cox. + + 2001/11/17 - Added ethtool support (jgarzik) + + 2002/10/28 - Locking updates for 2.5 (alan@lxorguk.ukuu.org.uk) + +*/ + +#define DRV_NAME "3c515" +#define DRV_VERSION "0.99t-ac" +#define DRV_RELDATE "28-Oct-2002" + +static char *version = +DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " becker@scyld.com and others\n"; + +#define CORKSCREW 1 + +/* "Knobs" that adjust features and parameters. */ +/* Set the copy breakpoint for the copy-only-tiny-frames scheme. + Setting to > 1512 effectively disables this feature. */ +static int rx_copybreak = 200; + +/* Allow setting MTU to a larger size, bypassing the normal ethernet setup. */ +static const int mtu = 1500; + +/* Maximum events (Rx packets, etc.) to handle at each interrupt. */ +static int max_interrupt_work = 20; + +/* Enable the automatic media selection code -- usually set. */ +#define AUTOMEDIA 1 + +/* Allow the use of fragment bus master transfers instead of only + programmed-I/O for Vortex cards. Full-bus-master transfers are always + enabled by default on Boomerang cards. If VORTEX_BUS_MASTER is defined, + the feature may be turned on using 'options'. */ +#define VORTEX_BUS_MASTER + +/* A few values that may be tweaked. */ +/* Keep the ring sizes a power of two for efficiency. */ +#define TX_RING_SIZE 16 +#define RX_RING_SIZE 16 +#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer. */ + +#include <linux/module.h> +#include <linux/isapnp.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/in.h> +#include <linux/ioport.h> +#include <linux/skbuff.h> +#include <linux/etherdevice.h> +#include <linux/interrupt.h> +#include <linux/timer.h> +#include <linux/ethtool.h> +#include <linux/bitops.h> + +#include <asm/uaccess.h> +#include <asm/io.h> +#include <asm/dma.h> + +#define NEW_MULTICAST +#include <linux/delay.h> + +#define MAX_UNITS 8 + +MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); +MODULE_DESCRIPTION("3Com 3c515 Corkscrew driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); + +/* "Knobs" for adjusting internal parameters. */ +/* Put out somewhat more debugging messages. (0 - no msg, 1 minimal msgs). */ +#define DRIVER_DEBUG 1 +/* Some values here only for performance evaluation and path-coverage + debugging. */ +static int rx_nocopy, rx_copy, queued_packet; + +/* 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 ((4*HZ)/10) /* Time in jiffies before concluding Tx hung */ + +/* The size here is somewhat misleading: the Corkscrew also uses the ISA + aliased registers at <base>+0x400. + */ +#define CORKSCREW_TOTAL_SIZE 0x20 + +#ifdef DRIVER_DEBUG +static int corkscrew_debug = DRIVER_DEBUG; +#else +static int corkscrew_debug = 1; +#endif + +#define CORKSCREW_ID 10 + +/* + Theory of Operation + +I. Board Compatibility + +This device driver is designed for the 3Com 3c515 ISA Fast EtherLink XL, +3Com's ISA bus adapter for Fast Ethernet. Due to the unique I/O port layout, +it's not practical to integrate this driver with the other EtherLink drivers. + +II. Board-specific settings + +The Corkscrew has an EEPROM for configuration, but no special settings are +needed for Linux. + +III. Driver operation + +The 3c515 series use an interface that's very similar to the 3c900 "Boomerang" +PCI cards, with the bus master interface extensively modified to work with +the ISA bus. + +The card is capable of full-bus-master transfers with separate +lists of transmit and receive descriptors, similar to the AMD LANCE/PCnet, +DEC Tulip and Intel Speedo3. + +This driver uses a "RX_COPYBREAK" scheme rather than a fixed intermediate +receive buffer. This scheme allocates full-sized skbuffs as receive +buffers. The value RX_COPYBREAK is used as the copying breakpoint: it is +chosen to trade-off the memory wasted by passing the full-sized skbuff to +the queue layer for all frames vs. the copying cost of copying a frame to a +correctly-sized skbuff. + + +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 netif +layer. The other thread is the interrupt handler, which is single +threaded by the hardware and other software. + +IV. Notes + +Thanks to Terry Murphy of 3Com for providing documentation and a development +board. + +The names "Vortex", "Boomerang" and "Corkscrew" are the internal 3Com +project names. I use these names to eliminate confusion -- 3Com product +numbers and names are very similar and often confused. + +The new chips support both ethernet (1.5K) and FDDI (4.5K) frame sizes! +This driver only supports ethernet frames because of the recent MTU limit +of 1.5K, but the changes to support 4.5K are minimal. +*/ + +/* 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 chips + can handle FDDI length frames (~4500 octets) and now parameters count + 32-bit 'Dwords' rather than octets. */ + +enum corkscrew_cmd { + TotalReset = 0 << 11, SelectWindow = 1 << 11, StartCoax = 2 << 11, + RxDisable = 3 << 11, RxEnable = 4 << 11, RxReset = 5 << 11, + UpStall = 6 << 11, UpUnstall = (6 << 11) + 1, DownStall = (6 << 11) + 2, + DownUnstall = (6 << 11) + 3, 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 corkscrew_status { + IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004, + TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020, + IntReq = 0x0040, StatsFull = 0x0080, + DMADone = 1 << 8, DownComplete = 1 << 9, UpComplete = 1 << 10, + 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 Corkscrew 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 { + Wn0IRQ = 0x08, +#if defined(CORKSCREW) + Wn0EepromCmd = 0x200A, /* Corkscrew EEPROM command register. */ + Wn0EepromData = 0x200C, /* Corkscrew EEPROM results register. */ +#else + Wn0EepromCmd = 10, /* Window 0: EEPROM command register. */ + Wn0EepromData = 12, /* Window 0: EEPROM results register. */ +#endif +}; +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, +}; + +enum Window3 { /* Window 3: MAC/config bits. */ + Wn3_Config = 0, Wn3_MAC_Ctrl = 6, Wn3_Options = 8, +}; +enum wn3_config { + Ram_size = 7, + Ram_width = 8, + Ram_speed = 0x30, + Rom_size = 0xc0, + Ram_split_shift = 16, + Ram_split = 3 << Ram_split_shift, + Xcvr_shift = 20, + Xcvr = 7 << Xcvr_shift, + Autoselect = 0x1000000, +}; + +enum Window4 { + Wn4_NetDiag = 6, Wn4_Media = 10, /* Window 4: Xcvr/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, +}; + +/* Boomerang-style bus master control registers. Note ISA aliases! */ +enum MasterCtrl { + PktStatus = 0x400, DownListPtr = 0x404, FragAddr = 0x408, FragLen = + 0x40c, + TxFreeThreshold = 0x40f, UpPktStatus = 0x410, UpListPtr = 0x418, +}; + +/* The Rx and Tx descriptor lists. + Caution Alpha hackers: these types are 32 bits! Note also the 8 byte + alignment contraint on tx_ring[] and rx_ring[]. */ +struct boom_rx_desc { + u32 next; + s32 status; + u32 addr; + s32 length; +}; + +/* Values for the Rx status entry. */ +enum rx_desc_status { + RxDComplete = 0x00008000, RxDError = 0x4000, + /* See boomerang_rx() for actual error bits */ +}; + +struct boom_tx_desc { + u32 next; + s32 status; + u32 addr; + s32 length; +}; + +struct corkscrew_private { + const char *product_name; + struct list_head list; + struct net_device *our_dev; + /* The Rx and Tx rings are here to keep them quad-word-aligned. */ + struct boom_rx_desc rx_ring[RX_RING_SIZE]; + struct boom_tx_desc tx_ring[TX_RING_SIZE]; + /* The addresses of transmit- and receive-in-place skbuffs. */ + struct sk_buff *rx_skbuff[RX_RING_SIZE]; + struct sk_buff *tx_skbuff[TX_RING_SIZE]; + unsigned int cur_rx, cur_tx; /* The next free ring entry */ + unsigned int dirty_rx, dirty_tx;/* The ring entries to be free()ed. */ + struct sk_buff *tx_skb; /* Packet being eaten by bus master ctrl. */ + struct timer_list timer; /* Media selection timer. */ + int capabilities ; /* Adapter capabilities word. */ + 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, autoselect:1, bus_master:1, /* Vortex can only do a fragment bus-m. */ + full_bus_master_tx:1, full_bus_master_rx:1, /* Boomerang */ + tx_full:1; + spinlock_t lock; + struct device *dev; +}; + +/* The action to take with a media selection timer tick. + Note that we deviate from the 3Com order by checking 10base2 before AUI. + */ +enum xcvr_types { + XCVR_10baseT = 0, XCVR_AUI, XCVR_10baseTOnly, XCVR_10base2, XCVR_100baseTx, + XCVR_100baseFx, XCVR_MII = 6, XCVR_Default = 8, +}; + +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, XCVR_10base2, (14 * HZ) / 10 }, + { "10Mbs AUI", Media_SQE, 0x20, XCVR_Default, (1 * HZ) / 10}, + { "undefined", 0, 0x80, XCVR_10baseT, 10000}, + { "10base2", 0, 0x10, XCVR_AUI, (1 * HZ) / 10}, + { "100baseTX", Media_Lnk, 0x02, XCVR_100baseFx, (14 * HZ) / 10}, + { "100baseFX", Media_Lnk, 0x04, XCVR_MII, (14 * HZ) / 10}, + { "MII", 0, 0x40, XCVR_10baseT, 3 * HZ}, + { "undefined", 0, 0x01, XCVR_10baseT, 10000}, + { "Default", 0, 0xFF, XCVR_10baseT, 10000}, +}; + +#ifdef __ISAPNP__ +static struct isapnp_device_id corkscrew_isapnp_adapters[] = { + { ISAPNP_ANY_ID, ISAPNP_ANY_ID, + ISAPNP_VENDOR('T', 'C', 'M'), ISAPNP_FUNCTION(0x5051), + (long) "3Com Fast EtherLink ISA" }, + { } /* terminate list */ +}; + +MODULE_DEVICE_TABLE(isapnp, corkscrew_isapnp_adapters); + +static int nopnp; +#endif /* __ISAPNP__ */ + +static struct net_device *corkscrew_scan(int unit); +static int corkscrew_setup(struct net_device *dev, int ioaddr, + struct pnp_dev *idev, int card_number); +static int corkscrew_open(struct net_device *dev); +static void corkscrew_timer(unsigned long arg); +static netdev_tx_t corkscrew_start_xmit(struct sk_buff *skb, + struct net_device *dev); +static int corkscrew_rx(struct net_device *dev); +static void corkscrew_timeout(struct net_device *dev); +static int boomerang_rx(struct net_device *dev); +static irqreturn_t corkscrew_interrupt(int irq, void *dev_id); +static int corkscrew_close(struct net_device *dev); +static void update_stats(int addr, struct net_device *dev); +static struct net_device_stats *corkscrew_get_stats(struct net_device *dev); +static void set_rx_mode(struct net_device *dev); +static const struct ethtool_ops netdev_ethtool_ops; + + +/* + 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 corkscrew_scan() + corkscrew_scan() The common routine that scans for PCI and EISA cards + corkscrew_found_device() Allocate a device structure when we find a card. + Different versions exist for modules and built-in. + corkscrew_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[MAX_UNITS] = { -1, -1, -1, -1, -1, -1, -1, -1, }; + +#ifdef MODULE +static int debug = -1; + +module_param(debug, int, 0); +module_param_array(options, int, NULL, 0); +module_param(rx_copybreak, int, 0); +module_param(max_interrupt_work, int, 0); +MODULE_PARM_DESC(debug, "3c515 debug level (0-6)"); +MODULE_PARM_DESC(options, "3c515: Bits 0-2: media type, bit 3: full duplex, bit 4: bus mastering"); +MODULE_PARM_DESC(rx_copybreak, "3c515 copy breakpoint for copy-only-tiny-frames"); +MODULE_PARM_DESC(max_interrupt_work, "3c515 maximum events handled per interrupt"); + +/* A list of all installed Vortex devices, for removing the driver module. */ +/* we will need locking (and refcounting) if we ever use it for more */ +static LIST_HEAD(root_corkscrew_dev); + +int init_module(void) +{ + int found = 0; + if (debug >= 0) + corkscrew_debug = debug; + if (corkscrew_debug) + pr_debug("%s", version); + while (corkscrew_scan(-1)) + found++; + return found ? 0 : -ENODEV; +} + +#else +struct net_device *tc515_probe(int unit) +{ + struct net_device *dev = corkscrew_scan(unit); + static int printed; + + if (!dev) + return ERR_PTR(-ENODEV); + + if (corkscrew_debug > 0 && !printed) { + printed = 1; + pr_debug("%s", version); + } + + return dev; +} +#endif /* not MODULE */ + +static int check_device(unsigned ioaddr) +{ + int timer; + + if (!request_region(ioaddr, CORKSCREW_TOTAL_SIZE, "3c515")) + return 0; + /* Check the resource configuration for a matching ioaddr. */ + if ((inw(ioaddr + 0x2002) & 0x1f0) != (ioaddr & 0x1f0)) { + release_region(ioaddr, CORKSCREW_TOTAL_SIZE); + return 0; + } + /* Verify by reading the device ID from the EEPROM. */ + outw(EEPROM_Read + 7, ioaddr + Wn0EepromCmd); + /* Pause for at least 162 us. for the read to take place. */ + for (timer = 4; timer >= 0; timer--) { + udelay(162); + if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0) + break; + } + if (inw(ioaddr + Wn0EepromData) != 0x6d50) { + release_region(ioaddr, CORKSCREW_TOTAL_SIZE); + return 0; + } + return 1; +} + +static void cleanup_card(struct net_device *dev) +{ + struct corkscrew_private *vp = netdev_priv(dev); + list_del_init(&vp->list); + if (dev->dma) + free_dma(dev->dma); + outw(TotalReset, dev->base_addr + EL3_CMD); + release_region(dev->base_addr, CORKSCREW_TOTAL_SIZE); + if (vp->dev) + pnp_device_detach(to_pnp_dev(vp->dev)); +} + +static struct net_device *corkscrew_scan(int unit) +{ + struct net_device *dev; + static int cards_found = 0; + static int ioaddr; + int err; +#ifdef __ISAPNP__ + short i; + static int pnp_cards; +#endif + + dev = alloc_etherdev(sizeof(struct corkscrew_private)); + if (!dev) + return ERR_PTR(-ENOMEM); + + if (unit >= 0) { + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + } + +#ifdef __ISAPNP__ + if(nopnp == 1) + goto no_pnp; + for(i=0; corkscrew_isapnp_adapters[i].vendor != 0; i++) { + struct pnp_dev *idev = NULL; + int irq; + while((idev = pnp_find_dev(NULL, + corkscrew_isapnp_adapters[i].vendor, + corkscrew_isapnp_adapters[i].function, + idev))) { + + if (pnp_device_attach(idev) < 0) + continue; + if (pnp_activate_dev(idev) < 0) { + pr_warning("pnp activate failed (out of resources?)\n"); + pnp_device_detach(idev); + continue; + } + if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) { + pnp_device_detach(idev); + continue; + } + ioaddr = pnp_port_start(idev, 0); + irq = pnp_irq(idev, 0); + if (!check_device(ioaddr)) { + pnp_device_detach(idev); + continue; + } + if(corkscrew_debug) + pr_debug("ISAPNP reports %s at i/o 0x%x, irq %d\n", + (char*) corkscrew_isapnp_adapters[i].driver_data, ioaddr, irq); + pr_info("3c515 Resource configuration register %#4.4x, DCR %4.4x.\n", + inl(ioaddr + 0x2002), inw(ioaddr + 0x2000)); + /* irq = inw(ioaddr + 0x2002) & 15; */ /* Use the irq from isapnp */ + SET_NETDEV_DEV(dev, &idev->dev); + pnp_cards++; + err = corkscrew_setup(dev, ioaddr, idev, cards_found++); + if (!err) + return dev; + cleanup_card(dev); + } + } +no_pnp: +#endif /* __ISAPNP__ */ + + /* Check all locations on the ISA bus -- evil! */ + for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x20) { + if (!check_device(ioaddr)) + continue; + + pr_info("3c515 Resource configuration register %#4.4x, DCR %4.4x.\n", + inl(ioaddr + 0x2002), inw(ioaddr + 0x2000)); + err = corkscrew_setup(dev, ioaddr, NULL, cards_found++); + if (!err) + return dev; + cleanup_card(dev); + } + free_netdev(dev); + return NULL; +} + + +static const struct net_device_ops netdev_ops = { + .ndo_open = corkscrew_open, + .ndo_stop = corkscrew_close, + .ndo_start_xmit = corkscrew_start_xmit, + .ndo_tx_timeout = corkscrew_timeout, + .ndo_get_stats = corkscrew_get_stats, + .ndo_set_multicast_list = set_rx_mode, + .ndo_change_mtu = eth_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + + +static int corkscrew_setup(struct net_device *dev, int ioaddr, + struct pnp_dev *idev, int card_number) +{ + struct corkscrew_private *vp = netdev_priv(dev); + unsigned int eeprom[0x40], checksum = 0; /* EEPROM contents */ + int i; + int irq; + +#ifdef __ISAPNP__ + if (idev) { + irq = pnp_irq(idev, 0); + vp->dev = &idev->dev; + } else { + irq = inw(ioaddr + 0x2002) & 15; + } +#else + irq = inw(ioaddr + 0x2002) & 15; +#endif + + dev->base_addr = ioaddr; + dev->irq = irq; + dev->dma = inw(ioaddr + 0x2000) & 7; + vp->product_name = "3c515"; + vp->options = dev->mem_start; + vp->our_dev = dev; + + if (!vp->options) { + if (card_number >= MAX_UNITS) + vp->options = -1; + else + vp->options = options[card_number]; + } + + if (vp->options >= 0) { + vp->media_override = vp->options & 7; + if (vp->media_override == 2) + vp->media_override = 0; + vp->full_duplex = (vp->options & 8) ? 1 : 0; + vp->bus_master = (vp->options & 16) ? 1 : 0; + } else { + vp->media_override = 7; + vp->full_duplex = 0; + vp->bus_master = 0; + } +#ifdef MODULE + list_add(&vp->list, &root_corkscrew_dev); +#endif + + pr_info("%s: 3Com %s at %#3x,", dev->name, vp->product_name, ioaddr); + + spin_lock_init(&vp->lock); + + /* Read the station address from the EEPROM. */ + EL3WINDOW(0); + for (i = 0; i < 0x18; i++) { + __be16 *phys_addr = (__be16 *) dev->dev_addr; + int timer; + outw(EEPROM_Read + i, ioaddr + Wn0EepromCmd); + /* Pause for at least 162 us. for the read to take place. */ + for (timer = 4; timer >= 0; timer--) { + udelay(162); + if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0) + break; + } + eeprom[i] = inw(ioaddr + Wn0EepromData); + checksum ^= eeprom[i]; + if (i < 3) + phys_addr[i] = htons(eeprom[i]); + } + checksum = (checksum ^ (checksum >> 8)) & 0xff; + if (checksum != 0x00) + pr_cont(" ***INVALID CHECKSUM %4.4x*** ", checksum); + pr_cont(" %pM", dev->dev_addr); + if (eeprom[16] == 0x11c7) { /* Corkscrew */ + if (request_dma(dev->dma, "3c515")) { + pr_cont(", DMA %d allocation failed", dev->dma); + dev->dma = 0; + } else + pr_cont(", DMA %d", dev->dma); + } + pr_cont(", IRQ %d\n", dev->irq); + /* Tell them about an invalid IRQ. */ + if (corkscrew_debug && (dev->irq <= 0 || dev->irq > 15)) + pr_warning(" *** Warning: this IRQ is unlikely to work! ***\n"); + + { + static const char * const ram_split[] = { + "5:3", "3:1", "1:1", "3:5" + }; + __u32 config; + EL3WINDOW(3); + vp->available_media = inw(ioaddr + Wn3_Options); + config = inl(ioaddr + Wn3_Config); + if (corkscrew_debug > 1) + pr_info(" Internal config register is %4.4x, transceivers %#x.\n", + config, inw(ioaddr + Wn3_Options)); + pr_info(" %dK %s-wide RAM %s Rx:Tx split, %s%s interface.\n", + 8 << config & Ram_size, + config & Ram_width ? "word" : "byte", + ram_split[(config & Ram_split) >> Ram_split_shift], + config & Autoselect ? "autoselect/" : "", + media_tbl[(config & Xcvr) >> Xcvr_shift].name); + vp->default_media = (config & Xcvr) >> Xcvr_shift; + vp->autoselect = config & Autoselect ? 1 : 0; + dev->if_port = vp->default_media; + } + if (vp->media_override != 7) { + pr_info(" Media override to transceiver type %d (%s).\n", + vp->media_override, + media_tbl[vp->media_override].name); + dev->if_port = vp->media_override; + } + + vp->capabilities = eeprom[16]; + vp->full_bus_master_tx = (vp->capabilities & 0x20) ? 1 : 0; + /* Rx is broken at 10mbps, so we always disable it. */ + /* vp->full_bus_master_rx = 0; */ + vp->full_bus_master_rx = (vp->capabilities & 0x20) ? 1 : 0; + + /* The 3c51x-specific entries in the device structure. */ + dev->netdev_ops = &netdev_ops; + dev->watchdog_timeo = (400 * HZ) / 1000; + dev->ethtool_ops = &netdev_ethtool_ops; + + return register_netdev(dev); +} + + +static int corkscrew_open(struct net_device *dev) +{ + int ioaddr = dev->base_addr; + struct corkscrew_private *vp = netdev_priv(dev); + __u32 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 = inl(ioaddr + Wn3_Config); + + if (vp->media_override != 7) { + if (corkscrew_debug > 1) + pr_info("%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 (corkscrew_debug > 1) + pr_debug("%s: Initial media type %s.\n", + dev->name, media_tbl[dev->if_port].name); + + init_timer(&vp->timer); + vp->timer.expires = jiffies + media_tbl[dev->if_port].wait; + vp->timer.data = (unsigned long) dev; + vp->timer.function = corkscrew_timer; /* timer handler */ + add_timer(&vp->timer); + } else + dev->if_port = vp->default_media; + + config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift); + outl(config, ioaddr + Wn3_Config); + + if (corkscrew_debug > 1) { + pr_debug("%s: corkscrew_open() InternalConfig %8.8x.\n", + dev->name, config); + } + + 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 (vp->capabilities == 0x11c7) { + /* Corkscrew: Cannot share ISA resources. */ + if (dev->irq == 0 || + dev->dma == 0 || + request_irq(dev->irq, corkscrew_interrupt, 0, + vp->product_name, dev)) + return -EAGAIN; + enable_dma(dev->dma); + set_dma_mode(dev->dma, DMA_MODE_CASCADE); + } else if (request_irq(dev->irq, corkscrew_interrupt, IRQF_SHARED, + vp->product_name, dev)) { + return -EAGAIN; + } + + if (corkscrew_debug > 1) { + EL3WINDOW(4); + pr_debug("%s: corkscrew_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); + /* ..and on the Boomerang we enable the extra statistics bits. */ + outw(0x0040, ioaddr + Wn4_NetDiag); + + /* Switch to register set 7 for normal use. */ + EL3WINDOW(7); + + if (vp->full_bus_master_rx) { /* Boomerang bus master. */ + vp->cur_rx = vp->dirty_rx = 0; + if (corkscrew_debug > 2) + pr_debug("%s: Filling in the Rx ring.\n", dev->name); + for (i = 0; i < RX_RING_SIZE; i++) { + struct sk_buff *skb; + if (i < (RX_RING_SIZE - 1)) + vp->rx_ring[i].next = + isa_virt_to_bus(&vp->rx_ring[i + 1]); + else + vp->rx_ring[i].next = 0; + vp->rx_ring[i].status = 0; /* Clear complete bit. */ + vp->rx_ring[i].length = PKT_BUF_SZ | 0x80000000; + skb = dev_alloc_skb(PKT_BUF_SZ); + vp->rx_skbuff[i] = skb; + if (skb == NULL) + break; /* Bad news! */ + skb->dev = dev; /* Mark as being used by this device. */ + skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ + vp->rx_ring[i].addr = isa_virt_to_bus(skb->data); + } + if (i != 0) + vp->rx_ring[i - 1].next = + isa_virt_to_bus(&vp->rx_ring[0]); /* Wrap the ring. */ + outl(isa_virt_to_bus(&vp->rx_ring[0]), ioaddr + UpListPtr); + } + if (vp->full_bus_master_tx) { /* Boomerang bus master Tx. */ + vp->cur_tx = vp->dirty_tx = 0; + outb(PKT_BUF_SZ >> 8, ioaddr + TxFreeThreshold); /* Room for a packet. */ + /* Clear the Tx ring. */ + for (i = 0; i < TX_RING_SIZE; i++) + vp->tx_skbuff[i] = NULL; + outl(0, ioaddr + DownListPtr); + } + /* Set receiver mode: presumably accept b-case and phys addr only. */ + set_rx_mode(dev); + outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */ + + netif_start_queue(dev); + + outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */ + outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */ + /* Allow status bits to be seen. */ + outw(SetStatusEnb | AdapterFailure | IntReq | StatsFull | + (vp->full_bus_master_tx ? DownComplete : TxAvailable) | + (vp->full_bus_master_rx ? UpComplete : RxComplete) | + (vp->bus_master ? DMADone : 0), 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 + | (vp->bus_master ? DMADone : 0) | UpComplete | DownComplete, + ioaddr + EL3_CMD); + + return 0; +} + +static void corkscrew_timer(unsigned long data) +{ +#ifdef AUTOMEDIA + struct net_device *dev = (struct net_device *) data; + struct corkscrew_private *vp = netdev_priv(dev); + int ioaddr = dev->base_addr; + unsigned long flags; + int ok = 0; + + if (corkscrew_debug > 1) + pr_debug("%s: Media selection timer tick happened, %s.\n", + dev->name, media_tbl[dev->if_port].name); + + spin_lock_irqsave(&vp->lock, flags); + + { + 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 (corkscrew_debug > 1) + pr_debug("%s: Media %s has link beat, %x.\n", + dev->name, + media_tbl[dev->if_port].name, + media_status); + } else if (corkscrew_debug > 1) + pr_debug("%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 (corkscrew_debug > 1) + pr_debug("%s: Media %s is has no indication, %x.\n", + dev->name, + media_tbl[dev->if_port].name, + media_status); + ok = 1; + } + if (!ok) { + __u32 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 (corkscrew_debug > 1) + pr_debug("%s: Media selection failing, using default %s port.\n", + dev->name, + media_tbl[dev->if_port].name); + } else { + if (corkscrew_debug > 1) + pr_debug("%s: Media selection failed, now trying %s port.\n", + dev->name, + media_tbl[dev->if_port].name); + vp->timer.expires = jiffies + 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 = inl(ioaddr + Wn3_Config); + config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift); + outl(config, ioaddr + Wn3_Config); + + outw(dev->if_port == 3 ? StartCoax : StopCoax, + ioaddr + EL3_CMD); + } + EL3WINDOW(old_window); + } + + spin_unlock_irqrestore(&vp->lock, flags); + if (corkscrew_debug > 1) + pr_debug("%s: Media selection timer finished, %s.\n", + dev->name, media_tbl[dev->if_port].name); + +#endif /* AUTOMEDIA */ +} + +static void corkscrew_timeout(struct net_device *dev) +{ + int i; + struct corkscrew_private *vp = netdev_priv(dev); + int ioaddr = dev->base_addr; + + pr_warning("%s: transmit timed out, tx_status %2.2x status %4.4x.\n", + dev->name, inb(ioaddr + TxStatus), + inw(ioaddr + EL3_STATUS)); + /* Slight code bloat to be user friendly. */ + if ((inb(ioaddr + TxStatus) & 0x88) == 0x88) + pr_warning("%s: Transmitter encountered 16 collisions --" + " network cable problem?\n", dev->name); +#ifndef final_version + pr_debug(" Flags; bus-master %d, full %d; dirty %d current %d.\n", + vp->full_bus_master_tx, vp->tx_full, vp->dirty_tx, + vp->cur_tx); + pr_debug(" Down list %8.8x vs. %p.\n", inl(ioaddr + DownListPtr), + &vp->tx_ring[0]); + for (i = 0; i < TX_RING_SIZE; i++) { + pr_debug(" %d: %p length %8.8x status %8.8x\n", i, + &vp->tx_ring[i], + vp->tx_ring[i].length, vp->tx_ring[i].status); + } +#endif + /* 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; /* prevent tx timeout */ + dev->stats.tx_errors++; + dev->stats.tx_dropped++; + netif_wake_queue(dev); +} + +static netdev_tx_t corkscrew_start_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct corkscrew_private *vp = netdev_priv(dev); + int ioaddr = dev->base_addr; + + /* Block a timer-based transmit from overlapping. */ + + netif_stop_queue(dev); + + if (vp->full_bus_master_tx) { /* BOOMERANG bus-master */ + /* Calculate the next Tx descriptor entry. */ + int entry = vp->cur_tx % TX_RING_SIZE; + struct boom_tx_desc *prev_entry; + unsigned long flags; + int i; + + if (vp->tx_full) /* No room to transmit with */ + return NETDEV_TX_BUSY; + if (vp->cur_tx != 0) + prev_entry = &vp->tx_ring[(vp->cur_tx - 1) % TX_RING_SIZE]; + else + prev_entry = NULL; + if (corkscrew_debug > 3) + pr_debug("%s: Trying to send a packet, Tx index %d.\n", + dev->name, vp->cur_tx); + /* vp->tx_full = 1; */ + vp->tx_skbuff[entry] = skb; + vp->tx_ring[entry].next = 0; + vp->tx_ring[entry].addr = isa_virt_to_bus(skb->data); + vp->tx_ring[entry].length = skb->len | 0x80000000; + vp->tx_ring[entry].status = skb->len | 0x80000000; + + spin_lock_irqsave(&vp->lock, flags); + outw(DownStall, ioaddr + EL3_CMD); + /* Wait for the stall to complete. */ + for (i = 20; i >= 0; i--) + if ((inw(ioaddr + EL3_STATUS) & CmdInProgress) == 0) + break; + if (prev_entry) + prev_entry->next = isa_virt_to_bus(&vp->tx_ring[entry]); + if (inl(ioaddr + DownListPtr) == 0) { + outl(isa_virt_to_bus(&vp->tx_ring[entry]), + ioaddr + DownListPtr); + queued_packet++; + } + outw(DownUnstall, ioaddr + EL3_CMD); + spin_unlock_irqrestore(&vp->lock, flags); + + vp->cur_tx++; + if (vp->cur_tx - vp->dirty_tx > TX_RING_SIZE - 1) + vp->tx_full = 1; + else { /* Clear previous interrupt enable. */ + if (prev_entry) + prev_entry->status &= ~0x80000000; + netif_wake_queue(dev); + } + return NETDEV_TX_OK; + } + /* Put out the doubleword header... */ + outl(skb->len, ioaddr + TX_FIFO); + dev->stats.tx_bytes += skb->len; +#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); + /* queue will be woken 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); + if (inw(ioaddr + TxFree) > 1536) { + netif_wake_queue(dev); + } 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); + if (inw(ioaddr + TxFree) > 1536) { + netif_wake_queue(dev); + } else + /* Interrupt us when the FIFO has room for max-sized packet. */ + outw(SetTxThreshold + (1536 >> 2), ioaddr + EL3_CMD); +#endif /* bus master */ + + + /* 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 (corkscrew_debug > 2) + pr_debug("%s: Tx error, status %2.2x.\n", + dev->name, tx_status); + if (tx_status & 0x04) + dev->stats.tx_fifo_errors++; + if (tx_status & 0x38) + dev->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 NETDEV_TX_OK; +} + +/* The interrupt handler does all of the Rx thread work and cleans up + after the Tx thread. */ + +static irqreturn_t corkscrew_interrupt(int irq, void *dev_id) +{ + /* Use the now-standard shared IRQ implementation. */ + struct net_device *dev = dev_id; + struct corkscrew_private *lp = netdev_priv(dev); + int ioaddr, status; + int latency; + int i = max_interrupt_work; + + ioaddr = dev->base_addr; + latency = inb(ioaddr + Timer); + + spin_lock(&lp->lock); + + status = inw(ioaddr + EL3_STATUS); + + if (corkscrew_debug > 4) + pr_debug("%s: interrupt, status %4.4x, timer %d.\n", + dev->name, status, latency); + if ((status & 0xE000) != 0xE000) { + static int donedidthis; + /* 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++ > 100) { + pr_err("%s: Bogus interrupt, bailing. Status %4.4x, start=%d.\n", + dev->name, status, netif_running(dev)); + free_irq(dev->irq, dev); + dev->irq = -1; + } + } + + do { + if (corkscrew_debug > 5) + pr_debug("%s: In interrupt loop, status %4.4x.\n", + dev->name, status); + if (status & RxComplete) + corkscrew_rx(dev); + + if (status & TxAvailable) { + if (corkscrew_debug > 5) + pr_debug(" TX room bit was handled.\n"); + /* There's room in the FIFO for a full-sized packet. */ + outw(AckIntr | TxAvailable, ioaddr + EL3_CMD); + netif_wake_queue(dev); + } + if (status & DownComplete) { + unsigned int dirty_tx = lp->dirty_tx; + + while (lp->cur_tx - dirty_tx > 0) { + int entry = dirty_tx % TX_RING_SIZE; + if (inl(ioaddr + DownListPtr) == isa_virt_to_bus(&lp->tx_ring[entry])) + break; /* It still hasn't been processed. */ + if (lp->tx_skbuff[entry]) { + dev_kfree_skb_irq(lp->tx_skbuff[entry]); + lp->tx_skbuff[entry] = NULL; + } + dirty_tx++; + } + lp->dirty_tx = dirty_tx; + outw(AckIntr | DownComplete, ioaddr + EL3_CMD); + if (lp->tx_full && (lp->cur_tx - dirty_tx <= TX_RING_SIZE - 1)) { + lp->tx_full = 0; + netif_wake_queue(dev); + } + } +#ifdef VORTEX_BUS_MASTER + if (status & DMADone) { + outw(0x1000, ioaddr + Wn7_MasterStatus); /* Ack the event. */ + dev_kfree_skb_irq(lp->tx_skb); /* Release the transferred buffer */ + netif_wake_queue(dev); + } +#endif + if (status & UpComplete) { + boomerang_rx(dev); + outw(AckIntr | UpComplete, ioaddr + EL3_CMD); + } + if (status & (AdapterFailure | RxEarly | StatsFull)) { + /* Handle all uncommon interrupts at once. */ + if (status & RxEarly) { /* Rx early is unused. */ + corkscrew_rx(dev); + outw(AckIntr | RxEarly, ioaddr + EL3_CMD); + } + if (status & StatsFull) { /* Empty statistics. */ + static int DoneDidThat; + if (corkscrew_debug > 4) + pr_debug("%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; + pr_notice("%s: Updating stats failed, disabling stats as an interrupt source.\n", + dev->name); + for (win = 0; win < 8; win++) { + EL3WINDOW(win); + pr_notice("Vortex window %d:", win); + for (reg = 0; reg < 16; reg++) + pr_cont(" %2.2x", inb(ioaddr + reg)); + pr_cont("\n"); + } + EL3WINDOW(7); + outw(SetIntrEnb | TxAvailable | + RxComplete | AdapterFailure | + UpComplete | DownComplete | + TxComplete, 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 < 0) { + pr_err("%s: Too much work in interrupt, status %4.4x. Disabling functions (%4.4x).\n", + dev->name, status, SetStatusEnb | ((~status) & 0x7FE)); + /* Disable all pending interrupts. */ + outw(SetStatusEnb | ((~status) & 0x7FE), ioaddr + EL3_CMD); + outw(AckIntr | 0x7FF, ioaddr + EL3_CMD); + break; + } + /* Acknowledge the IRQ. */ + outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD); + + } while ((status = inw(ioaddr + EL3_STATUS)) & (IntLatch | RxComplete)); + + spin_unlock(&lp->lock); + + if (corkscrew_debug > 4) + pr_debug("%s: exiting interrupt, status %4.4x.\n", dev->name, status); + return IRQ_HANDLED; +} + +static int corkscrew_rx(struct net_device *dev) +{ + int ioaddr = dev->base_addr; + int i; + short rx_status; + + if (corkscrew_debug > 5) + pr_debug(" 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 (corkscrew_debug > 2) + pr_debug(" Rx error: status %2.2x.\n", + rx_error); + dev->stats.rx_errors++; + if (rx_error & 0x01) + dev->stats.rx_over_errors++; + if (rx_error & 0x02) + dev->stats.rx_length_errors++; + if (rx_error & 0x04) + dev->stats.rx_frame_errors++; + if (rx_error & 0x08) + dev->stats.rx_crc_errors++; + if (rx_error & 0x10) + dev->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 + 2); + if (corkscrew_debug > 4) + pr_debug("Receiving packet size %d status %4.4x.\n", + pkt_len, rx_status); + if (skb != NULL) { + 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); + outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */ + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + dev->stats.rx_packets++; + dev->stats.rx_bytes += pkt_len; + /* Wait a limited time to go to next packet. */ + for (i = 200; i >= 0; i--) + if (! (inw(ioaddr + EL3_STATUS) & CmdInProgress)) + break; + continue; + } else if (corkscrew_debug) + pr_debug("%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, pkt_len); + } + outw(RxDiscard, ioaddr + EL3_CMD); + dev->stats.rx_dropped++; + /* 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 boomerang_rx(struct net_device *dev) +{ + struct corkscrew_private *vp = netdev_priv(dev); + int entry = vp->cur_rx % RX_RING_SIZE; + int ioaddr = dev->base_addr; + int rx_status; + + if (corkscrew_debug > 5) + pr_debug(" In boomerang_rx(), status %4.4x, rx_status %4.4x.\n", + inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus)); + while ((rx_status = vp->rx_ring[entry].status) & RxDComplete) { + if (rx_status & RxDError) { /* Error, update stats. */ + unsigned char rx_error = rx_status >> 16; + if (corkscrew_debug > 2) + pr_debug(" Rx error: status %2.2x.\n", + rx_error); + dev->stats.rx_errors++; + if (rx_error & 0x01) + dev->stats.rx_over_errors++; + if (rx_error & 0x02) + dev->stats.rx_length_errors++; + if (rx_error & 0x04) + dev->stats.rx_frame_errors++; + if (rx_error & 0x08) + dev->stats.rx_crc_errors++; + if (rx_error & 0x10) + dev->stats.rx_length_errors++; + } else { + /* The packet length: up to 4.5K!. */ + short pkt_len = rx_status & 0x1fff; + struct sk_buff *skb; + + dev->stats.rx_bytes += pkt_len; + if (corkscrew_debug > 4) + pr_debug("Receiving packet size %d status %4.4x.\n", + pkt_len, rx_status); + + /* Check if the packet is long enough to just accept without + copying to a properly sized skbuff. */ + if (pkt_len < rx_copybreak && + (skb = dev_alloc_skb(pkt_len + 4)) != NULL) { + skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ + /* 'skb_put()' points to the start of sk_buff data area. */ + memcpy(skb_put(skb, pkt_len), + isa_bus_to_virt(vp->rx_ring[entry]. + addr), pkt_len); + rx_copy++; + } else { + void *temp; + /* Pass up the skbuff already on the Rx ring. */ + skb = vp->rx_skbuff[entry]; + vp->rx_skbuff[entry] = NULL; + temp = skb_put(skb, pkt_len); + /* Remove this checking code for final release. */ + if (isa_bus_to_virt(vp->rx_ring[entry].addr) != temp) + pr_warning("%s: Warning -- the skbuff addresses do not match" + " in boomerang_rx: %p vs. %p / %p.\n", + dev->name, + isa_bus_to_virt(vp-> + rx_ring[entry]. + addr), skb->head, + temp); + rx_nocopy++; + } + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + dev->stats.rx_packets++; + } + entry = (++vp->cur_rx) % RX_RING_SIZE; + } + /* Refill the Rx ring buffers. */ + for (; vp->cur_rx - vp->dirty_rx > 0; vp->dirty_rx++) { + struct sk_buff *skb; + entry = vp->dirty_rx % RX_RING_SIZE; + if (vp->rx_skbuff[entry] == NULL) { + skb = dev_alloc_skb(PKT_BUF_SZ); + if (skb == NULL) + break; /* Bad news! */ + skb->dev = dev; /* Mark as being used by this device. */ + skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ + vp->rx_ring[entry].addr = isa_virt_to_bus(skb->data); + vp->rx_skbuff[entry] = skb; + } + vp->rx_ring[entry].status = 0; /* Clear complete bit. */ + } + return 0; +} + +static int corkscrew_close(struct net_device *dev) +{ + struct corkscrew_private *vp = netdev_priv(dev); + int ioaddr = dev->base_addr; + int i; + + netif_stop_queue(dev); + + if (corkscrew_debug > 1) { + pr_debug("%s: corkscrew_close() status %4.4x, Tx status %2.2x.\n", + dev->name, inw(ioaddr + EL3_STATUS), + inb(ioaddr + TxStatus)); + pr_debug("%s: corkscrew close stats: rx_nocopy %d rx_copy %d tx_queued %d.\n", + dev->name, rx_nocopy, rx_copy, queued_packet); + } + + 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 == XCVR_10base2) + /* Turn off thinnet power. Green! */ + outw(StopCoax, ioaddr + EL3_CMD); + + free_irq(dev->irq, dev); + + outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD); + + update_stats(ioaddr, dev); + if (vp->full_bus_master_rx) { /* Free Boomerang bus master Rx buffers. */ + outl(0, ioaddr + UpListPtr); + for (i = 0; i < RX_RING_SIZE; i++) + if (vp->rx_skbuff[i]) { + dev_kfree_skb(vp->rx_skbuff[i]); + vp->rx_skbuff[i] = NULL; + } + } + if (vp->full_bus_master_tx) { /* Free Boomerang bus master Tx buffers. */ + outl(0, ioaddr + DownListPtr); + for (i = 0; i < TX_RING_SIZE; i++) + if (vp->tx_skbuff[i]) { + dev_kfree_skb(vp->tx_skbuff[i]); + vp->tx_skbuff[i] = NULL; + } + } + + return 0; +} + +static struct net_device_stats *corkscrew_get_stats(struct net_device *dev) +{ + struct corkscrew_private *vp = netdev_priv(dev); + unsigned long flags; + + if (netif_running(dev)) { + spin_lock_irqsave(&vp->lock, flags); + update_stats(dev->base_addr, dev); + spin_unlock_irqrestore(&vp->lock, flags); + } + return &dev->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 net_device *dev) +{ + /* Unlike the 3c5x9 we need not turn off stats updates while reading. */ + /* Switch to the stats window, and read everything. */ + EL3WINDOW(6); + dev->stats.tx_carrier_errors += inb(ioaddr + 0); + dev->stats.tx_heartbeat_errors += inb(ioaddr + 1); + /* Multiple collisions. */ inb(ioaddr + 2); + dev->stats.collisions += inb(ioaddr + 3); + dev->stats.tx_window_errors += inb(ioaddr + 4); + dev->stats.rx_fifo_errors += inb(ioaddr + 5); + dev->stats.tx_packets += inb(ioaddr + 6); + dev->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); +} + +/* 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 net_device *dev) +{ + int ioaddr = dev->base_addr; + short new_mode; + + if (dev->flags & IFF_PROMISC) { + if (corkscrew_debug > 3) + pr_debug("%s: Setting promiscuous mode.\n", + dev->name); + new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm; + } else if (!netdev_mc_empty(dev) || dev->flags & IFF_ALLMULTI) { + new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast; + } else + new_mode = SetRxFilter | RxStation | RxBroadcast; + + outw(new_mode, ioaddr + EL3_CMD); +} + +static void netdev_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + strcpy(info->driver, DRV_NAME); + strcpy(info->version, DRV_VERSION); + sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr); +} + +static u32 netdev_get_msglevel(struct net_device *dev) +{ + return corkscrew_debug; +} + +static void netdev_set_msglevel(struct net_device *dev, u32 level) +{ + corkscrew_debug = level; +} + +static const struct ethtool_ops netdev_ethtool_ops = { + .get_drvinfo = netdev_get_drvinfo, + .get_msglevel = netdev_get_msglevel, + .set_msglevel = netdev_set_msglevel, +}; + + +#ifdef MODULE +void cleanup_module(void) +{ + while (!list_empty(&root_corkscrew_dev)) { + struct net_device *dev; + struct corkscrew_private *vp; + + vp = list_entry(root_corkscrew_dev.next, + struct corkscrew_private, list); + dev = vp->our_dev; + unregister_netdev(dev); + cleanup_card(dev); + free_netdev(dev); + } +} +#endif /* MODULE */ |