diff options
Diffstat (limited to 'drivers/net/tulip/xircom_tulip_cb.c')
| -rw-r--r-- | drivers/net/tulip/xircom_tulip_cb.c | 1748 |
1 files changed, 1748 insertions, 0 deletions
diff --git a/drivers/net/tulip/xircom_tulip_cb.c b/drivers/net/tulip/xircom_tulip_cb.c new file mode 100644 index 000000000000..32ccb26890c3 --- /dev/null +++ b/drivers/net/tulip/xircom_tulip_cb.c @@ -0,0 +1,1748 @@ +/* xircom_tulip_cb.c: A Xircom CBE-100 ethernet driver for Linux. */ +/* + Written/copyright 1994-1999 by Donald Becker. + + This software may be used and distributed according to the terms + of the GNU General Public License, incorporated herein by reference. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation + 410 Severn Ave., Suite 210 + Annapolis MD 21403 + + ----------------------------------------------------------- + + Linux kernel-specific changes: + + LK1.0 (Ion Badulescu) + - Major cleanup + - Use 2.4 PCI API + - Support ethtool + - Rewrite perfect filter/hash code + - Use interrupts for media changes + + LK1.1 (Ion Badulescu) + - Disallow negotiation of unsupported full-duplex modes +*/ + +#define DRV_NAME "xircom_tulip_cb" +#define DRV_VERSION "0.91+LK1.1" +#define DRV_RELDATE "October 11, 2001" + +#define CARDBUS 1 + +/* A few user-configurable values. */ + +#define xircom_debug debug +#ifdef XIRCOM_DEBUG +static int xircom_debug = XIRCOM_DEBUG; +#else +static int xircom_debug = 1; +#endif + +/* Maximum events (Rx packets, etc.) to handle at each interrupt. */ +static int max_interrupt_work = 25; + +#define MAX_UNITS 4 +/* Used to pass the full-duplex flag, etc. */ +static int full_duplex[MAX_UNITS]; +static int options[MAX_UNITS]; +static int mtu[MAX_UNITS]; /* Jumbo MTU for interfaces. */ + +/* Keep the ring sizes a power of two for efficiency. + Making the Tx ring too large decreases the effectiveness of channel + bonding and packet priority. + There are no ill effects from too-large receive rings. */ +#define TX_RING_SIZE 16 +#define RX_RING_SIZE 32 + +/* Set the copy breakpoint for the copy-only-tiny-buffer Rx structure. */ +#ifdef __alpha__ +static int rx_copybreak = 1518; +#else +static int rx_copybreak = 100; +#endif + +/* + Set the bus performance register. + Typical: Set 16 longword cache alignment, no burst limit. + Cache alignment bits 15:14 Burst length 13:8 + 0000 No alignment 0x00000000 unlimited 0800 8 longwords + 4000 8 longwords 0100 1 longword 1000 16 longwords + 8000 16 longwords 0200 2 longwords 2000 32 longwords + C000 32 longwords 0400 4 longwords + Warning: many older 486 systems are broken and require setting 0x00A04800 + 8 longword cache alignment, 8 longword burst. + ToDo: Non-Intel setting could be better. +*/ + +#if defined(__alpha__) || defined(__ia64__) || defined(__x86_64__) +static int csr0 = 0x01A00000 | 0xE000; +#elif defined(__powerpc__) +static int csr0 = 0x01B00000 | 0x8000; +#elif defined(__sparc__) +static int csr0 = 0x01B00080 | 0x8000; +#elif defined(__i386__) +static int csr0 = 0x01A00000 | 0x8000; +#else +#warning Processor architecture undefined! +static int csr0 = 0x00A00000 | 0x4800; +#endif + +/* Operational parameters that usually are not changed. */ +/* Time in jiffies before concluding the transmitter is hung. */ +#define TX_TIMEOUT (4 * HZ) +#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/ +#define PKT_SETUP_SZ 192 /* Size of the setup frame */ + +/* PCI registers */ +#define PCI_POWERMGMT 0x40 + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/mii.h> +#include <linux/ethtool.h> +#include <linux/crc32.h> + +#include <asm/io.h> +#include <asm/processor.h> /* Processor type for cache alignment. */ +#include <asm/uaccess.h> + + +/* These identify the driver base version and may not be removed. */ +static char version[] __devinitdata = +KERN_INFO DRV_NAME ".c derived from tulip.c:v0.91 4/14/99 becker@scyld.com\n" +KERN_INFO " unofficial 2.4.x kernel port, version " DRV_VERSION ", " DRV_RELDATE "\n"; + +MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); +MODULE_DESCRIPTION("Xircom CBE-100 ethernet driver"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION(DRV_VERSION); + +module_param(debug, int, 0); +module_param(max_interrupt_work, int, 0); +module_param(rx_copybreak, int, 0); +module_param(csr0, int, 0); + +module_param_array(options, int, NULL, 0); +module_param_array(full_duplex, int, NULL, 0); + +#define RUN_AT(x) (jiffies + (x)) + +/* + Theory of Operation + +I. Board Compatibility + +This device driver was forked from the driver for the DECchip "Tulip", +Digital's single-chip ethernet controllers for PCI. It supports Xircom's +almost-Tulip-compatible CBE-100 CardBus adapters. + +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 preferably should assign the +PCI INTA signal to an otherwise unused system IRQ line. + +III. Driver operation + +IIIa. Ring buffers + +The Xircom can use either ring buffers or lists of Tx and Rx descriptors. +This driver uses statically allocated rings of Rx and Tx descriptors, set at +compile time by RX/TX_RING_SIZE. This version of the driver allocates skbuffs +for the Rx ring buffers at open() time and passes the skb->data field to the +Xircom as receive data buffers. When an incoming frame is less than +RX_COPYBREAK bytes long, a fresh skbuff is allocated and the frame is +copied to the new skbuff. When the incoming frame is larger, the skbuff is +passed directly up the protocol stack and replaced by a newly allocated +skbuff. + +The RX_COPYBREAK value is chosen to trade-off the memory wasted by +using a full-sized skbuff for small frames vs. the copying costs of larger +frames. For small frames the copying cost is negligible (esp. considering +that we are pre-loading the cache with immediately useful header +information). For large frames the copying cost is non-trivial, and the +larger copy might flush the cache of useful data. A subtle aspect of this +choice is that the Xircom only receives into longword aligned buffers, thus +the IP header at offset 14 isn't longword aligned for further processing. +Copied frames are put into the new skbuff at an offset of "+2", thus copying +has the beneficial effect of aligning the IP header and preloading the +cache. + +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. + +The send packet thread has partial control over the Tx ring and 'dev->tbusy' +flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next +queue slot is empty, it clears the tbusy flag when finished otherwise it sets +the 'tp->tx_full' flag. + +The interrupt handler has exclusive control over the Rx ring and records stats +from the Tx ring. (The Tx-done interrupt can't be selectively turned off, so +we can't avoid the interrupt overhead by having the Tx routine reap the Tx +stats.) After reaping the stats, it marks the queue entry as empty by setting +the 'base' to zero. Iff the 'tp->tx_full' flag is set, it clears both the +tx_full and tbusy flags. + +IV. Notes + +IVb. References + +http://cesdis.gsfc.nasa.gov/linux/misc/NWay.html +http://www.digital.com (search for current 21*4* datasheets and "21X4 SROM") +http://www.national.com/pf/DP/DP83840A.html + +IVc. Errata + +*/ + +/* A full-duplex map for media types. */ +enum MediaIs { + MediaIsFD = 1, MediaAlwaysFD=2, MediaIsMII=4, MediaIsFx=8, + MediaIs100=16}; +static const char media_cap[] = +{0,0,0,16, 3,19,16,24, 27,4,7,5, 0,20,23,20 }; + +/* Offsets to the Command and Status Registers, "CSRs". All accesses + must be longword instructions and quadword aligned. */ +enum xircom_offsets { + CSR0=0, CSR1=0x08, CSR2=0x10, CSR3=0x18, CSR4=0x20, CSR5=0x28, + CSR6=0x30, CSR7=0x38, CSR8=0x40, CSR9=0x48, CSR10=0x50, CSR11=0x58, + CSR12=0x60, CSR13=0x68, CSR14=0x70, CSR15=0x78, CSR16=0x04, }; + +/* The bits in the CSR5 status registers, mostly interrupt sources. */ +enum status_bits { + LinkChange=0x08000000, + NormalIntr=0x10000, NormalIntrMask=0x00014045, + AbnormalIntr=0x8000, AbnormalIntrMask=0x0a00a5a2, + ReservedIntrMask=0xe0001a18, + EarlyRxIntr=0x4000, BusErrorIntr=0x2000, + EarlyTxIntr=0x400, RxDied=0x100, RxNoBuf=0x80, RxIntr=0x40, + TxFIFOUnderflow=0x20, TxNoBuf=0x04, TxDied=0x02, TxIntr=0x01, +}; + +enum csr0_control_bits { + EnableMWI=0x01000000, EnableMRL=0x00800000, + EnableMRM=0x00200000, EqualBusPrio=0x02, + SoftwareReset=0x01, +}; + +enum csr6_control_bits { + ReceiveAllBit=0x40000000, AllMultiBit=0x80, PromiscBit=0x40, + HashFilterBit=0x01, FullDuplexBit=0x0200, + TxThresh10=0x400000, TxStoreForw=0x200000, + TxThreshMask=0xc000, TxThreshShift=14, + EnableTx=0x2000, EnableRx=0x02, + ReservedZeroMask=0x8d930134, ReservedOneMask=0x320c0000, + EnableTxRx=(EnableTx | EnableRx), +}; + + +enum tbl_flag { + HAS_MII=1, HAS_ACPI=2, +}; +static struct xircom_chip_table { + char *chip_name; + int valid_intrs; /* CSR7 interrupt enable settings */ + int flags; +} xircom_tbl[] = { + { "Xircom Cardbus Adapter", + LinkChange | NormalIntr | AbnormalIntr | BusErrorIntr | + RxDied | RxNoBuf | RxIntr | TxFIFOUnderflow | TxNoBuf | TxDied | TxIntr, + HAS_MII | HAS_ACPI, }, + { NULL, }, +}; +/* This matches the table above. */ +enum chips { + X3201_3, +}; + + +/* The Xircom Rx and Tx buffer descriptors. */ +struct xircom_rx_desc { + s32 status; + s32 length; + u32 buffer1, buffer2; +}; + +struct xircom_tx_desc { + s32 status; + s32 length; + u32 buffer1, buffer2; /* We use only buffer 1. */ +}; + +enum tx_desc0_status_bits { + Tx0DescOwned=0x80000000, Tx0DescError=0x8000, Tx0NoCarrier=0x0800, + Tx0LateColl=0x0200, Tx0ManyColl=0x0100, Tx0Underflow=0x02, +}; +enum tx_desc1_status_bits { + Tx1ComplIntr=0x80000000, Tx1LastSeg=0x40000000, Tx1FirstSeg=0x20000000, + Tx1SetupPkt=0x08000000, Tx1DisableCRC=0x04000000, Tx1RingWrap=0x02000000, + Tx1ChainDesc=0x01000000, Tx1NoPad=0x800000, Tx1HashSetup=0x400000, + Tx1WholePkt=(Tx1FirstSeg | Tx1LastSeg), +}; +enum rx_desc0_status_bits { + Rx0DescOwned=0x80000000, Rx0DescError=0x8000, Rx0NoSpace=0x4000, + Rx0Runt=0x0800, Rx0McastPkt=0x0400, Rx0FirstSeg=0x0200, Rx0LastSeg=0x0100, + Rx0HugeFrame=0x80, Rx0CRCError=0x02, + Rx0WholePkt=(Rx0FirstSeg | Rx0LastSeg), +}; +enum rx_desc1_status_bits { + Rx1RingWrap=0x02000000, Rx1ChainDesc=0x01000000, +}; + +struct xircom_private { + struct xircom_rx_desc rx_ring[RX_RING_SIZE]; + struct xircom_tx_desc tx_ring[TX_RING_SIZE]; + /* The saved address of a sent-in-place packet/buffer, for skfree(). */ + struct sk_buff* tx_skbuff[TX_RING_SIZE]; +#ifdef CARDBUS + /* The X3201-3 requires 4-byte aligned tx bufs */ + struct sk_buff* tx_aligned_skbuff[TX_RING_SIZE]; +#endif + /* The addresses of receive-in-place skbuffs. */ + struct sk_buff* rx_skbuff[RX_RING_SIZE]; + u16 setup_frame[PKT_SETUP_SZ / sizeof(u16)]; /* Pseudo-Tx frame to init address table. */ + int chip_id; + struct net_device_stats stats; + unsigned int cur_rx, cur_tx; /* The next free ring entry */ + unsigned int dirty_rx, dirty_tx; /* The ring entries to be free()ed. */ + unsigned int tx_full:1; /* The Tx queue is full. */ + unsigned int speed100:1; + unsigned int full_duplex:1; /* Full-duplex operation requested. */ + unsigned int autoneg:1; + unsigned int default_port:4; /* Last dev->if_port value. */ + unsigned int open:1; + unsigned int csr0; /* CSR0 setting. */ + unsigned int csr6; /* Current CSR6 control settings. */ + u16 to_advertise; /* NWay capabilities advertised. */ + u16 advertising[4]; + signed char phys[4], mii_cnt; /* MII device addresses. */ + int saved_if_port; + struct pci_dev *pdev; + spinlock_t lock; +}; + +static int mdio_read(struct net_device *dev, int phy_id, int location); +static void mdio_write(struct net_device *dev, int phy_id, int location, int value); +static void xircom_up(struct net_device *dev); +static void xircom_down(struct net_device *dev); +static int xircom_open(struct net_device *dev); +static void xircom_tx_timeout(struct net_device *dev); +static void xircom_init_ring(struct net_device *dev); +static int xircom_start_xmit(struct sk_buff *skb, struct net_device *dev); +static int xircom_rx(struct net_device *dev); +static void xircom_media_change(struct net_device *dev); +static irqreturn_t xircom_interrupt(int irq, void *dev_instance, struct pt_regs *regs); +static int xircom_close(struct net_device *dev); +static struct net_device_stats *xircom_get_stats(struct net_device *dev); +static int xircom_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); +static void set_rx_mode(struct net_device *dev); +static void check_duplex(struct net_device *dev); +static struct ethtool_ops ops; + + +/* The Xircom cards are picky about when certain bits in CSR6 can be + manipulated. Keith Owens <kaos@ocs.com.au>. */ +static void outl_CSR6(u32 newcsr6, long ioaddr) +{ + const int strict_bits = + TxThresh10 | TxStoreForw | TxThreshMask | EnableTxRx | FullDuplexBit; + int csr5, csr5_22_20, csr5_19_17, currcsr6, attempts = 200; + unsigned long flags; + save_flags(flags); + cli(); + /* mask out the reserved bits that always read 0 on the Xircom cards */ + newcsr6 &= ~ReservedZeroMask; + /* or in the reserved bits that always read 1 */ + newcsr6 |= ReservedOneMask; + currcsr6 = inl(ioaddr + CSR6); + if (((newcsr6 & strict_bits) == (currcsr6 & strict_bits)) || + ((currcsr6 & ~EnableTxRx) == 0)) { + outl(newcsr6, ioaddr + CSR6); /* safe */ + restore_flags(flags); + return; + } + /* make sure the transmitter and receiver are stopped first */ + currcsr6 &= ~EnableTxRx; + while (1) { + csr5 = inl(ioaddr + CSR5); + if (csr5 == 0xffffffff) + break; /* cannot read csr5, card removed? */ + csr5_22_20 = csr5 & 0x700000; + csr5_19_17 = csr5 & 0x0e0000; + if ((csr5_22_20 == 0 || csr5_22_20 == 0x600000) && + (csr5_19_17 == 0 || csr5_19_17 == 0x80000 || csr5_19_17 == 0xc0000)) + break; /* both are stopped or suspended */ + if (!--attempts) { + printk(KERN_INFO DRV_NAME ": outl_CSR6 too many attempts," + "csr5=0x%08x\n", csr5); + outl(newcsr6, ioaddr + CSR6); /* unsafe but do it anyway */ + restore_flags(flags); + return; + } + outl(currcsr6, ioaddr + CSR6); + udelay(1); + } + /* now it is safe to change csr6 */ + outl(newcsr6, ioaddr + CSR6); + restore_flags(flags); +} + + +static void __devinit read_mac_address(struct net_device *dev) +{ + long ioaddr = dev->base_addr; + int i, j; + unsigned char tuple, link, data_id, data_count; + + /* Xircom has its address stored in the CIS; + * we access it through the boot rom interface for now + * this might not work, as the CIS is not parsed but I + * (danilo) use the offset I found on my card's CIS !!! + * + * Doug Ledford: I changed this routine around so that it + * walks the CIS memory space, parsing the config items, and + * finds the proper lan_node_id tuple and uses the data + * stored there. + */ + outl(1 << 12, ioaddr + CSR9); /* enable boot rom access */ + for (i = 0x100; i < 0x1f7; i += link+2) { + outl(i, ioaddr + CSR10); + tuple = inl(ioaddr + CSR9) & 0xff; + outl(i + 1, ioaddr + CSR10); + link = inl(ioaddr + CSR9) & 0xff; + outl(i + 2, ioaddr + CSR10); + data_id = inl(ioaddr + CSR9) & 0xff; + outl(i + 3, ioaddr + CSR10); + data_count = inl(ioaddr + CSR9) & 0xff; + if ( (tuple == 0x22) && + (data_id == 0x04) && (data_count == 0x06) ) { + /* + * This is it. We have the data we want. + */ + for (j = 0; j < 6; j++) { + outl(i + j + 4, ioaddr + CSR10); + dev->dev_addr[j] = inl(ioaddr + CSR9) & 0xff; + } + break; + } else if (link == 0) { + break; + } + } +} + + +/* + * locate the MII interfaces and initialize them. + * we disable full-duplex modes here, + * because we don't know how to handle them. + */ +static void find_mii_transceivers(struct net_device *dev) +{ + struct xircom_private *tp = netdev_priv(dev); + int phy, phy_idx; + + if (media_cap[tp->default_port] & MediaIsMII) { + u16 media2advert[] = { 0x20, 0x40, 0x03e0, 0x60, 0x80, 0x100, 0x200 }; + tp->to_advertise = media2advert[tp->default_port - 9]; + } else + tp->to_advertise = + /*ADVERTISE_100BASE4 | ADVERTISE_100FULL |*/ ADVERTISE_100HALF | + /*ADVERTISE_10FULL |*/ ADVERTISE_10HALF | ADVERTISE_CSMA; + + /* Find the connected MII xcvrs. + Doing this in open() would allow detecting external xcvrs later, + but takes much time. */ + for (phy = 0, phy_idx = 0; phy < 32 && phy_idx < sizeof(tp->phys); phy++) { + int mii_status = mdio_read(dev, phy, MII_BMSR); + if ((mii_status & (BMSR_100BASE4 | BMSR_100HALF | BMSR_10HALF)) == BMSR_100BASE4 || + ((mii_status & BMSR_100BASE4) == 0 && + (mii_status & (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL | BMSR_10HALF)) != 0)) { + int mii_reg0 = mdio_read(dev, phy, MII_BMCR); + int mii_advert = mdio_read(dev, phy, MII_ADVERTISE); + int reg4 = ((mii_status >> 6) & tp->to_advertise) | ADVERTISE_CSMA; + tp->phys[phy_idx] = phy; + tp->advertising[phy_idx++] = reg4; + printk(KERN_INFO "%s: MII transceiver #%d " + "config %4.4x status %4.4x advertising %4.4x.\n", + dev->name, phy, mii_reg0, mii_status, mii_advert); + } + } + tp->mii_cnt = phy_idx; + if (phy_idx == 0) { + printk(KERN_INFO "%s: ***WARNING***: No MII transceiver found!\n", + dev->name); + tp->phys[0] = 0; + } +} + + +/* + * To quote Arjan van de Ven: + * transceiver_voodoo() enables the external UTP plug thingy. + * it's called voodoo as I stole this code and cannot cross-reference + * it with the specification. + * Actually it seems to go like this: + * - GPIO2 enables the MII itself so we can talk to it. The MII gets reset + * so any prior MII settings are lost. + * - GPIO0 enables the TP port so the MII can talk to the network. + * - a software reset will reset both GPIO pins. + * I also moved the software reset here, because doing it in xircom_up() + * required enabling the GPIO pins each time, which reset the MII each time. + * Thus we couldn't control the MII -- which sucks because we don't know + * how to handle full-duplex modes so we *must* disable them. + */ +static void transceiver_voodoo(struct net_device *dev) +{ + struct xircom_private *tp = netdev_priv(dev); + long ioaddr = dev->base_addr; + + /* Reset the chip, holding bit 0 set at least 50 PCI cycles. */ + outl(SoftwareReset, ioaddr + CSR0); + udelay(2); + + /* Deassert reset. */ + outl(tp->csr0, ioaddr + CSR0); + + /* Reset the xcvr interface and turn on heartbeat. */ + outl(0x0008, ioaddr + CSR15); + udelay(5); /* The delays are Xircom-recommended to give the + * chipset time to reset the actual hardware + * on the PCMCIA card + */ + outl(0xa8050000, ioaddr + CSR15); + udelay(5); + outl(0xa00f0000, ioaddr + CSR15); + udelay(5); + + outl_CSR6(0, ioaddr); + //outl_CSR6(FullDuplexBit, ioaddr); +} + + +static int __devinit xircom_init_one(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct net_device *dev; + struct xircom_private *tp; + static int board_idx = -1; + int chip_idx = id->driver_data; + long ioaddr; + int i; + u8 chip_rev; + +/* when built into the kernel, we only print version if device is found */ +#ifndef MODULE + static int printed_version; + if (!printed_version++) + printk(version); +#endif + + //printk(KERN_INFO "xircom_init_one(%s)\n", pci_name(pdev)); + + board_idx++; + + if (pci_enable_device(pdev)) + return -ENODEV; + + pci_set_master(pdev); + + ioaddr = pci_resource_start(pdev, 0); + dev = alloc_etherdev(sizeof(*tp)); + if (!dev) { + printk (KERN_ERR DRV_NAME "%d: cannot alloc etherdev, aborting\n", board_idx); + return -ENOMEM; + } + SET_MODULE_OWNER(dev); + SET_NETDEV_DEV(dev, &pdev->dev); + + dev->base_addr = ioaddr; + dev->irq = pdev->irq; + + if (pci_request_regions(pdev, dev->name)) { + printk (KERN_ERR DRV_NAME " %d: cannot reserve PCI resources, aborting\n", board_idx); + goto err_out_free_netdev; + } + + /* Bring the chip out of sleep mode. + Caution: Snooze mode does not work with some boards! */ + if (xircom_tbl[chip_idx].flags & HAS_ACPI) + pci_write_config_dword(pdev, PCI_POWERMGMT, 0); + + /* Stop the chip's Tx and Rx processes. */ + outl_CSR6(inl(ioaddr + CSR6) & ~EnableTxRx, ioaddr); + /* Clear the missed-packet counter. */ + (volatile int)inl(ioaddr + CSR8); + + tp = netdev_priv(dev); + + spin_lock_init(&tp->lock); + tp->pdev = pdev; + tp->chip_id = chip_idx; + /* BugFixes: The 21143-TD hangs with PCI Write-and-Invalidate cycles. */ + /* XXX: is this necessary for Xircom? */ + tp->csr0 = csr0 & ~EnableMWI; + + pci_set_drvdata(pdev, dev); + + /* The lower four bits are the media type. */ + if (board_idx >= 0 && board_idx < MAX_UNITS) { + tp->default_port = options[board_idx] & 15; + if ((options[board_idx] & 0x90) || full_duplex[board_idx] > 0) + tp->full_duplex = 1; + if (mtu[board_idx] > 0) + dev->mtu = mtu[board_idx]; + } + if (dev->mem_start) + tp->default_port = dev->mem_start; + if (tp->default_port) { + if (media_cap[tp->default_port] & MediaAlwaysFD) + tp->full_duplex = 1; + } + if (tp->full_duplex) + tp->autoneg = 0; + else + tp->autoneg = 1; + tp->speed100 = 1; + + /* The Xircom-specific entries in the device structure. */ + dev->open = &xircom_open; + dev->hard_start_xmit = &xircom_start_xmit; + dev->stop = &xircom_close; + dev->get_stats = &xircom_get_stats; + dev->do_ioctl = &xircom_ioctl; +#ifdef HAVE_MULTICAST + dev->set_multicast_list = &set_rx_mode; +#endif + dev->tx_timeout = xircom_tx_timeout; + dev->watchdog_timeo = TX_TIMEOUT; + SET_ETHTOOL_OPS(dev, &ops); + + transceiver_voodoo(dev); + + read_mac_address(dev); + + if (register_netdev(dev)) + goto err_out_cleardev; + + pci_read_config_byte(pdev, PCI_REVISION_ID, &chip_rev); + printk(KERN_INFO "%s: %s rev %d at %#3lx,", + dev->name, xircom_tbl[chip_idx].chip_name, chip_rev, ioaddr); + for (i = 0; i < 6; i++) + printk("%c%2.2X", i ? ':' : ' ', dev->dev_addr[i]); + printk(", IRQ %d.\n", dev->irq); + + if (xircom_tbl[chip_idx].flags & HAS_MII) { + find_mii_transceivers(dev); + check_duplex(dev); + } + + return 0; + +err_out_cleardev: + pci_set_drvdata(pdev, NULL); + pci_release_regions(pdev); +err_out_free_netdev: + free_netdev(dev); + return -ENODEV; +} + + +/* MII transceiver control section. + Read and write the MII registers using software-generated serial + MDIO protocol. See the MII specifications or DP83840A data sheet + for details. */ + +/* The maximum data clock rate is 2.5 Mhz. The minimum timing is usually + met by back-to-back PCI I/O cycles, but we insert a delay to avoid + "overclocking" issues or future 66Mhz PCI. */ +#define mdio_delay() inl(mdio_addr) + +/* Read and write the MII registers using software-generated serial + MDIO protocol. It is just different enough from the EEPROM protocol + to not share code. The maxium data clock rate is 2.5 Mhz. */ +#define MDIO_SHIFT_CLK 0x10000 +#define MDIO_DATA_WRITE0 0x00000 +#define MDIO_DATA_WRITE1 0x20000 +#define MDIO_ENB 0x00000 /* Ignore the 0x02000 databook setting. */ +#define MDIO_ENB_IN 0x40000 +#define MDIO_DATA_READ 0x80000 + +static int mdio_read(struct net_device *dev, int phy_id, int location) +{ + int i; + int read_cmd = (0xf6 << 10) | (phy_id << 5) | location; + int retval = 0; + long ioaddr = dev->base_addr; + long mdio_addr = ioaddr + CSR9; + + /* Establish sync by sending at least 32 logic ones. */ + for (i = 32; i >= 0; i--) { + outl(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr); + mdio_delay(); + outl(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr); + mdio_delay(); + } + /* Shift the read command bits out. */ + for (i = 15; i >= 0; i--) { + int dataval = (read_cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0; + + outl(MDIO_ENB | dataval, mdio_addr); + mdio_delay(); + outl(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr); + mdio_delay(); + } + /* Read the two transition, 16 data, and wire-idle bits. */ + for (i = 19; i > 0; i--) { + outl(MDIO_ENB_IN, mdio_addr); + mdio_delay(); + retval = (retval << 1) | ((inl(mdio_addr) & MDIO_DATA_READ) ? 1 : 0); + outl(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr); + mdio_delay(); + } + return (retval>>1) & 0xffff; +} + + +static void mdio_write(struct net_device *dev, int phy_id, int location, int value) +{ + int i; + int cmd = (0x5002 << 16) | (phy_id << 23) | (location << 18) | value; + long ioaddr = dev->base_addr; + long mdio_addr = ioaddr + CSR9; + + /* Establish sync by sending 32 logic ones. */ + for (i = 32; i >= 0; i--) { + outl(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr); + mdio_delay(); + outl(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr); + mdio_delay(); + } + /* Shift the command bits out. */ + for (i = 31; i >= 0; i--) { + int dataval = (cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0; + outl(MDIO_ENB | dataval, mdio_addr); + mdio_delay(); + outl(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr); + mdio_delay(); + } + /* Clear out extra bits. */ + for (i = 2; i > 0; i--) { + outl(MDIO_ENB_IN, mdio_addr); + mdio_delay(); + outl(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr); + mdio_delay(); + } + return; +} + + +static void +xircom_up(struct net_device *dev) +{ + struct xircom_private *tp = netdev_priv(dev); + long ioaddr = dev->base_addr; + int i; + + xircom_init_ring(dev); + /* Clear the tx ring */ + for (i = 0; i < TX_RING_SIZE; i++) { + tp->tx_skbuff[i] = NULL; + tp->tx_ring[i].status = 0; + } + + if (xircom_debug > 1) + printk(KERN_DEBUG "%s: xircom_up() irq %d.\n", dev->name, dev->irq); + + outl(virt_to_bus(tp->rx_ring), ioaddr + CSR3); + outl(virt_to_bus(tp->tx_ring), ioaddr + CSR4); + + tp->saved_if_port = dev->if_port; + if (dev->if_port == 0) + dev->if_port = tp->default_port; + + tp->csr6 = TxThresh10 /*| FullDuplexBit*/; /* XXX: why 10 and not 100? */ + + set_rx_mode(dev); + + /* Start the chip's Tx to process setup frame. */ + outl_CSR6(tp->csr6, ioaddr); + outl_CSR6(tp->csr6 | EnableTx, ioaddr); + + /* Acknowledge all outstanding interrupts sources */ + outl(xircom_tbl[tp->chip_id].valid_intrs, ioaddr + CSR5); + /* Enable interrupts by setting the interrupt mask. */ + outl(xircom_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7); + /* Enable Rx */ + outl_CSR6(tp->csr6 | EnableTxRx, ioaddr); + /* Rx poll demand */ + outl(0, ioaddr + CSR2); + + /* Tell the net layer we're ready */ + netif_start_queue (dev); + + /* Check current media state */ + xircom_media_change(dev); + + if (xircom_debug > 2) { + printk(KERN_DEBUG "%s: Done xircom_up(), CSR0 %8.8x, CSR5 %8.8x CSR6 %8.8x.\n", + dev->name, inl(ioaddr + CSR0), inl(ioaddr + CSR5), + inl(ioaddr + CSR6)); + } +} + + +static int +xircom_open(struct net_device *dev) +{ + struct xircom_private *tp = netdev_priv(dev); + + if (request_irq(dev->irq, &xircom_interrupt, SA_SHIRQ, dev->name, dev)) + return -EAGAIN; + + xircom_up(dev); + tp->open = 1; + + return 0; +} + + +static void xircom_tx_timeout(struct net_device *dev) +{ + struct xircom_private *tp = netdev_priv(dev); + long ioaddr = dev->base_addr; + + if (media_cap[dev->if_port] & MediaIsMII) { + /* Do nothing -- the media monitor should handle this. */ + if (xircom_debug > 1) + printk(KERN_WARNING "%s: Transmit timeout using MII device.\n", + dev->name); + } + +#if defined(way_too_many_messages) + if (xircom_debug > 3) { + int i; + for (i = 0; i < RX_RING_SIZE; i++) { + u8 *buf = (u8 *)(tp->rx_ring[i].buffer1); + int j; + printk(KERN_DEBUG "%2d: %8.8x %8.8x %8.8x %8.8x " + "%2.2x %2.2x %2.2x.\n", + i, (unsigned int)tp->rx_ring[i].status, + (unsigned int)tp->rx_ring[i].length, + (unsigned int)tp->rx_ring[i].buffer1, + (unsigned int)tp->rx_ring[i].buffer2, + buf[0], buf[1], buf[2]); + for (j = 0; buf[j] != 0xee && j < 1600; j++) + if (j < 100) printk(" %2.2x", buf[j]); + printk(" j=%d.\n", j); + } + printk(KERN_DEBUG " Rx ring %8.8x: ", (int)tp->rx_ring); + for (i = 0; i < RX_RING_SIZE; i++) + printk(" %8.8x", (unsigned int)tp->rx_ring[i].status); + printk("\n" KERN_DEBUG " Tx ring %8.8x: ", (int)tp->tx_ring); + for (i = 0; i < TX_RING_SIZE; i++) + printk(" %8.8x", (unsigned int)tp->tx_ring[i].status); + printk("\n"); + } +#endif + + /* Stop and restart the chip's Tx/Rx processes . */ + outl_CSR6(tp->csr6 | EnableRx, ioaddr); + outl_CSR6(tp->csr6 | EnableTxRx, ioaddr); + /* Trigger an immediate transmit demand. */ + outl(0, ioaddr + CSR1); + + dev->trans_start = jiffies; + netif_wake_queue (dev); + tp->stats.tx_errors++; +} + + +/* Initialize the Rx and Tx rings, along with various 'dev' bits. */ +static void xircom_init_ring(struct net_device *dev) +{ + struct xircom_private *tp = netdev_priv(dev); + int i; + + tp->tx_full = 0; + tp->cur_rx = tp->cur_tx = 0; + tp->dirty_rx = tp->dirty_tx = 0; + + for (i = 0; i < RX_RING_SIZE; i++) { + tp->rx_ring[i].status = 0; + tp->rx_ring[i].length = PKT_BUF_SZ; + tp->rx_ring[i].buffer2 = virt_to_bus(&tp->rx_ring[i+1]); + tp->rx_skbuff[i] = NULL; + } + /* Mark the last entry as wrapping the ring. */ + tp->rx_ring[i-1].length = PKT_BUF_SZ | Rx1RingWrap; + tp->rx_ring[i-1].buffer2 = virt_to_bus(&tp->rx_ring[0]); + + for (i = 0; i < RX_RING_SIZE; i++) { + /* Note the receive buffer must be longword aligned. + dev_alloc_skb() provides 16 byte alignment. But do *not* + use skb_reserve() to align the IP header! */ + struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ); + tp->rx_skbuff[i] = skb; + if (skb == NULL) + break; + skb->dev = dev; /* Mark as being used by this device. */ + tp->rx_ring[i].status = Rx0DescOwned; /* Owned by Xircom chip */ + tp->rx_ring[i].buffer1 = virt_to_bus(skb->tail); + } + tp->dirty_rx = (unsigned int)(i - RX_RING_SIZE); + + /* The Tx buffer descriptor is filled in as needed, but we + do need to clear the ownership bit. */ + for (i = 0; i < TX_RING_SIZE; i++) { + tp->tx_skbuff[i] = NULL; + tp->tx_ring[i].status = 0; + tp->tx_ring[i].buffer2 = virt_to_bus(&tp->tx_ring[i+1]); +#ifdef CARDBUS + if (tp->chip_id == X3201_3) + tp->tx_aligned_skbuff[i] = dev_alloc_skb(PKT_BUF_SZ); +#endif /* CARDBUS */ + } + tp->tx_ring[i-1].buffer2 = virt_to_bus(&tp->tx_ring[0]); +} + + +static int +xircom_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct xircom_private *tp = netdev_priv(dev); + int entry; + u32 flag; + + /* Caution: the write order is important here, set the base address + with the "ownership" bits last. */ + + /* Calculate the next Tx descriptor entry. */ + entry = tp->cur_tx % TX_RING_SIZE; + + tp->tx_skbuff[entry] = skb; +#ifdef CARDBUS + if (tp->chip_id == X3201_3) { + memcpy(tp->tx_aligned_skbuff[entry]->data,skb->data,skb->len); + tp->tx_ring[entry].buffer1 = virt_to_bus(tp->tx_aligned_skbuff[entry]->data); + } else +#endif + tp->tx_ring[entry].buffer1 = virt_to_bus(skb->data); + + if (tp->cur_tx - tp->dirty_tx < TX_RING_SIZE/2) {/* Typical path */ + flag = Tx1WholePkt; /* No interrupt */ + } else if (tp->cur_tx - tp->dirty_tx == TX_RING_SIZE/2) { + flag = Tx1WholePkt | Tx1ComplIntr; /* Tx-done intr. */ + } else if (tp->cur_tx - tp->dirty_tx < TX_RING_SIZE - 2) { + flag = Tx1WholePkt; /* No Tx-done intr. */ + } else { + /* Leave room for set_rx_mode() to fill entries. */ + flag = Tx1WholePkt | Tx1ComplIntr; /* Tx-done intr. */ + tp->tx_full = 1; + } + if (entry == TX_RING_SIZE - 1) + flag |= Tx1WholePkt | Tx1ComplIntr | Tx1RingWrap; + + tp->tx_ring[entry].length = skb->len | flag; + tp->tx_ring[entry].status = Tx0DescOwned; /* Pass ownership to the chip. */ + tp->cur_tx++; + if (tp->tx_full) + netif_stop_queue (dev); + else + netif_wake_queue (dev); + + /* Trigger an immediate transmit demand. */ + outl(0, dev->base_addr + CSR1); + + dev->trans_start = jiffies; + + return 0; +} + + +static void xircom_media_change(struct net_device *dev) +{ + struct xircom_private *tp = netdev_priv(dev); + long ioaddr = dev->base_addr; + u16 reg0, reg1, reg4, reg5; + u32 csr6 = inl(ioaddr + CSR6), newcsr6; + + /* reset status first */ + mdio_read(dev, tp->phys[0], MII_BMCR); + mdio_read(dev, tp->phys[0], MII_BMSR); + + reg0 = mdio_read(dev, tp->phys[0], MII_BMCR); + reg1 = mdio_read(dev, tp->phys[0], MII_BMSR); + + if (reg1 & BMSR_LSTATUS) { + /* link is up */ + if (reg0 & BMCR_ANENABLE) { + /* autonegotiation is enabled */ + reg4 = mdio_read(dev, tp->phys[0], MII_ADVERTISE); + reg5 = mdio_read(dev, tp->phys[0], MII_LPA); + if (reg4 & ADVERTISE_100FULL && reg5 & LPA_100FULL) { + tp->speed100 = 1; + tp->full_duplex = 1; + } else if (reg4 & ADVERTISE_100HALF && reg5 & LPA_100HALF) { + tp->speed100 = 1; + tp->full_duplex = 0; + } else if (reg4 & ADVERTISE_10FULL && reg5 & LPA_10FULL) { + tp->speed100 = 0; + tp->full_duplex = 1; + } else { + tp->speed100 = 0; + tp->full_duplex = 0; + } + } else { + /* autonegotiation is disabled */ + if (reg0 & BMCR_SPEED100) + tp->speed100 = 1; + else + tp->speed100 = 0; + if (reg0 & BMCR_FULLDPLX) + tp->full_duplex = 1; + else + tp->full_duplex = 0; + } + printk(KERN_DEBUG "%s: Link is up, running at %sMbit %s-duplex\n", + dev->name, + tp->speed100 ? "100" : "10", + tp->full_duplex ? "full" : "half"); + netif_carrier_on(dev); + newcsr6 = csr6 & ~FullDuplexBit; + if (tp->full_duplex) + newcsr6 |= FullDuplexBit; + if (newcsr6 != csr6) + outl_CSR6(newcsr6, ioaddr + CSR6); + } else { + printk(KERN_DEBUG "%s: Link is down\n", dev->name); + netif_carrier_off(dev); + } +} + + +static void check_duplex(struct net_device *dev) +{ + struct xircom_private *tp = netdev_priv(dev); + u16 reg0; + + mdio_write(dev, tp->phys[0], MII_BMCR, BMCR_RESET); + udelay(500); + while (mdio_read(dev, tp->phys[0], MII_BMCR) & BMCR_RESET); + + reg0 = mdio_read(dev, tp->phys[0], MII_BMCR); + mdio_write(dev, tp->phys[0], MII_ADVERTISE, tp->advertising[0]); + + if (tp->autoneg) { + reg0 &= ~(BMCR_SPEED100 | BMCR_FULLDPLX); + reg0 |= BMCR_ANENABLE | BMCR_ANRESTART; + } else { + reg0 &= ~(BMCR_ANENABLE | BMCR_ANRESTART); + if (tp->speed100) + reg0 |= BMCR_SPEED100; + if (tp->full_duplex) + reg0 |= BMCR_FULLDPLX; + printk(KERN_DEBUG "%s: Link forced to %sMbit %s-duplex\n", + dev->name, + tp->speed100 ? "100" : "10", + tp->full_duplex ? "full" : "half"); + } + mdio_write(dev, tp->phys[0], MII_BMCR, reg0); +} + + +/* The interrupt handler does all of the Rx thread work and cleans up + after the Tx thread. */ +static irqreturn_t xircom_interrupt(int irq, void *dev_instance, struct pt_regs *regs) +{ + struct net_device *dev = dev_instance; + struct xircom_private *tp = netdev_priv(dev); + long ioaddr = dev->base_addr; + int csr5, work_budget = max_interrupt_work; + int handled = 0; + + spin_lock (&tp->lock); + + do { + csr5 = inl(ioaddr + CSR5); + /* Acknowledge all of the current interrupt sources ASAP. */ + outl(csr5 & 0x0001ffff, ioaddr + CSR5); + + if (xircom_debug > 4) + printk(KERN_DEBUG "%s: interrupt csr5=%#8.8x new csr5=%#8.8x.\n", + dev->name, csr5, inl(dev->base_addr + CSR5)); + + if (csr5 == 0xffffffff) + break; /* all bits set, assume PCMCIA card removed */ + + if ((csr5 & (NormalIntr|AbnormalIntr)) == 0) + break; + + handled = 1; + + if (csr5 & (RxIntr | RxNoBuf)) + work_budget -= xircom_rx(dev); + + if (csr5 & (TxNoBuf | TxDied | TxIntr)) { + unsigned int dirty_tx; + + for (dirty_tx = tp->dirty_tx; tp->cur_tx - dirty_tx > 0; + dirty_tx++) { + int entry = dirty_tx % TX_RING_SIZE; + int status = tp->tx_ring[entry].status; + + if (status < 0) + break; /* It still hasn't been Txed */ + /* Check for Rx filter setup frames. */ + if (tp->tx_skbuff[entry] == NULL) + continue; + + if (status & Tx0DescError) { + /* There was an major error, log it. */ +#ifndef final_version + if (xircom_debug > 1) + printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n", + dev->name, status); +#endif + tp->stats.tx_errors++; + if (status & Tx0ManyColl) { + tp->stats.tx_aborted_errors++; + } + if (status & Tx0NoCarrier) tp->stats.tx_carrier_errors++; + if (status & Tx0LateColl) tp->stats.tx_window_errors++; + if (status & Tx0Underflow) tp->stats.tx_fifo_errors++; + } else { + tp->stats.tx_bytes += tp->tx_ring[entry].length & 0x7ff; + tp->stats.collisions += (status >> 3) & 15; + tp->stats.tx_packets++; + } + + /* Free the original skb. */ + dev_kfree_skb_irq(tp->tx_skbuff[entry]); + tp->tx_skbuff[entry] = NULL; + } + +#ifndef final_version + if (tp->cur_tx - dirty_tx > TX_RING_SIZE) { + printk(KERN_ERR "%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n", + dev->name, dirty_tx, tp->cur_tx, tp->tx_full); + dirty_tx += TX_RING_SIZE; + } +#endif + + if (tp->tx_full && + tp->cur_tx - dirty_tx < TX_RING_SIZE - 2) + /* The ring is no longer full */ + tp->tx_full = 0; + + if (tp->tx_full) + netif_stop_queue (dev); + else + netif_wake_queue (dev); + + tp->dirty_tx = dirty_tx; + if (csr5 & TxDied) { + if (xircom_debug > 2) + printk(KERN_WARNING "%s: The transmitter stopped." + " CSR5 is %x, CSR6 %x, new CSR6 %x.\n", + dev->name, csr5, inl(ioaddr + CSR6), tp->csr6); + outl_CSR6(tp->csr6 | EnableRx, ioaddr); + outl_CSR6(tp->csr6 | EnableTxRx, ioaddr); + } + } + + /* Log errors. */ + if (csr5 & AbnormalIntr) { /* Abnormal error summary bit. */ + if (csr5 & LinkChange) + xircom_media_change(dev); + if (csr5 & TxFIFOUnderflow) { + if ((tp->csr6 & TxThreshMask) != TxThreshMask) + tp->csr6 += (1 << TxThreshShift); /* Bump up the Tx threshold */ + else + tp->csr6 |= TxStoreForw; /* Store-n-forward. */ + /* Restart the transmit process. */ + outl_CSR6(tp->csr6 | EnableRx, ioaddr); + outl_CSR6(tp->csr6 | EnableTxRx, ioaddr); + } + if (csr5 & RxDied) { /* Missed a Rx frame. */ + tp->stats.rx_errors++; + tp->stats.rx_missed_errors += inl(ioaddr + CSR8) & 0xffff; + outl_CSR6(tp->csr6 | EnableTxRx, ioaddr); + } + /* Clear all error sources, included undocumented ones! */ + outl(0x0800f7ba, ioaddr + CSR5); + } + if (--work_budget < 0) { + if (xircom_debug > 1) + printk(KERN_WARNING "%s: Too much work during an interrupt, " + "csr5=0x%8.8x.\n", dev->name, csr5); + /* Acknowledge all interrupt sources. */ + outl(0x8001ffff, ioaddr + CSR5); + break; + } + } while (1); + + if (xircom_debug > 3) + printk(KERN_DEBUG "%s: exiting interrupt, csr5=%#4.4x.\n", + dev->name, inl(ioaddr + CSR5)); + + spin_unlock (&tp->lock); + return IRQ_RETVAL(handled); +} + + +static int +xircom_rx(struct net_device *dev) +{ + struct xircom_private *tp = netdev_priv(dev); + int entry = tp->cur_rx % RX_RING_SIZE; + int rx_work_limit = tp->dirty_rx + RX_RING_SIZE - tp->cur_rx; + int work_done = 0; + + if (xircom_debug > 4) + printk(KERN_DEBUG " In xircom_rx(), entry %d %8.8x.\n", entry, + tp->rx_ring[entry].status); + /* If we own the next entry, it's a new packet. Send it up. */ + while (tp->rx_ring[entry].status >= 0) { + s32 status = tp->rx_ring[entry].status; + + if (xircom_debug > 5) + printk(KERN_DEBUG " In xircom_rx(), entry %d %8.8x.\n", entry, + tp->rx_ring[entry].status); + if (--rx_work_limit < 0) + break; + if ((status & 0x38008300) != 0x0300) { + if ((status & 0x38000300) != 0x0300) { + /* Ignore earlier buffers. */ + if ((status & 0xffff) != 0x7fff) { + if (xircom_debug > 1) + printk(KERN_WARNING "%s: Oversized Ethernet frame " + "spanned multiple buffers, status %8.8x!\n", + dev->name, status); + tp->stats.rx_length_errors++; + } + } else if (status & Rx0DescError) { + /* There was a fatal error. */ + if (xircom_debug > 2) + printk(KERN_DEBUG "%s: Receive error, Rx status %8.8x.\n", + dev->name, status); + tp->stats.rx_errors++; /* end of a packet.*/ + if (status & (Rx0Runt | Rx0HugeFrame)) tp->stats.rx_length_errors++; + if (status & Rx0CRCError) tp->stats.rx_crc_errors++; + } + } else { + /* Omit the four octet CRC from the length. */ + short pkt_len = ((status >> 16) & 0x7ff) - 4; + struct sk_buff *skb; + +#ifndef final_version + if (pkt_len > 1518) { + printk(KERN_WARNING "%s: Bogus packet size of %d (%#x).\n", + dev->name, pkt_len, pkt_len); + pkt_len = 1518; + tp->stats.rx_length_errors++; + } +#endif + /* Check if the packet is long enough to accept without copying + to a minimally-sized skbuff. */ + if (pkt_len < rx_copybreak + && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) { + skb->dev = dev; + skb_reserve(skb, 2); /* 16 byte align the IP header */ +#if ! defined(__alpha__) + eth_copy_and_sum(skb, bus_to_virt(tp->rx_ring[entry].buffer1), + pkt_len, 0); + skb_put(skb, pkt_len); +#else + memcpy(skb_put(skb, pkt_len), + bus_to_virt(tp->rx_ring[entry].buffer1), pkt_len); +#endif + work_done++; + } else { /* Pass up the skb already on the Rx ring. */ + skb_put(skb = tp->rx_skbuff[entry], pkt_len); + tp->rx_skbuff[entry] = NULL; + } + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + dev->last_rx = jiffies; + tp->stats.rx_packets++; + tp->stats.rx_bytes += pkt_len; + } + entry = (++tp->cur_rx) % RX_RING_SIZE; + } + + /* Refill the Rx ring buffers. */ + for (; tp->cur_rx - tp->dirty_rx > 0; tp->dirty_rx++) { + entry = tp->dirty_rx % RX_RING_SIZE; + if (tp->rx_skbuff[entry] == NULL) { + struct sk_buff *skb; + skb = tp->rx_skbuff[entry] = dev_alloc_skb(PKT_BUF_SZ); + if (skb == NULL) + break; + skb->dev = dev; /* Mark as being used by this device. */ + tp->rx_ring[entry].buffer1 = virt_to_bus(skb->tail); + work_done++; + } + tp->rx_ring[entry].status = Rx0DescOwned; + } + + return work_done; +} + + +static void +xircom_down(struct net_device *dev) +{ + long ioaddr = dev->base_addr; + struct xircom_private *tp = netdev_priv(dev); + + /* Disable interrupts by clearing the interrupt mask. */ + outl(0, ioaddr + CSR7); + /* Stop the chip's Tx and Rx processes. */ + outl_CSR6(inl(ioaddr + CSR6) & ~EnableTxRx, ioaddr); + + if (inl(ioaddr + CSR6) != 0xffffffff) + tp->stats.rx_missed_errors += inl(ioaddr + CSR8) & 0xffff; + + dev->if_port = tp->saved_if_port; +} + + +static int +xircom_close(struct net_device *dev) +{ + long ioaddr = dev->base_addr; + struct xircom_private *tp = netdev_priv(dev); + int i; + + if (xircom_debug > 1) + printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n", + dev->name, inl(ioaddr + CSR5)); + + netif_stop_queue(dev); + + if (netif_device_present(dev)) + xircom_down(dev); + + free_irq(dev->irq, dev); + + /* Free all the skbuffs in the Rx queue. */ + for (i = 0; i < RX_RING_SIZE; i++) { + struct sk_buff *skb = tp->rx_skbuff[i]; + tp->rx_skbuff[i] = NULL; + tp->rx_ring[i].status = 0; /* Not owned by Xircom chip. */ + tp->rx_ring[i].length = 0; + tp->rx_ring[i].buffer1 = 0xBADF00D0; /* An invalid address. */ + if (skb) { + dev_kfree_skb(skb); + } + } + for (i = 0; i < TX_RING_SIZE; i++) { + if (tp->tx_skbuff[i]) + dev_kfree_skb(tp->tx_skbuff[i]); + tp->tx_skbuff[i] = NULL; + } + + tp->open = 0; + return 0; +} + + +static struct net_device_stats *xircom_get_stats(struct net_device *dev) +{ + struct xircom_private *tp = netdev_priv(dev); + long ioaddr = dev->base_addr; + + if (netif_device_present(dev)) + tp->stats.rx_missed_errors += inl(ioaddr + CSR8) & 0xffff; + + return &tp->stats; +} + +static int xircom_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd) +{ + struct xircom_private *tp = netdev_priv(dev); + ecmd->supported = + SUPPORTED_10baseT_Half | + SUPPORTED_10baseT_Full | + SUPPORTED_100baseT_Half | + SUPPORTED_100baseT_Full | + SUPPORTED_Autoneg | + SUPPORTED_MII; + + ecmd->advertising = ADVERTISED_MII; + if (tp->advertising[0] & ADVERTISE_10HALF) + ecmd->advertising |= ADVERTISED_10baseT_Half; + if (tp->advertising[0] & ADVERTISE_10FULL) + ecmd->advertising |= ADVERTISED_10baseT_Full; + if (tp->advertising[0] & ADVERTISE_100HALF) + ecmd->advertising |= ADVERTISED_100baseT_Half; + if (tp->advertising[0] & ADVERTISE_100FULL) + ecmd->advertising |= ADVERTISED_100baseT_Full; + if (tp->autoneg) { + ecmd->advertising |= ADVERTISED_Autoneg; + ecmd->autoneg = AUTONEG_ENABLE; + } else + ecmd->autoneg = AUTONEG_DISABLE; + + ecmd->port = PORT_MII; + ecmd->transceiver = XCVR_INTERNAL; + ecmd->phy_address = tp->phys[0]; + ecmd->speed = tp->speed100 ? SPEED_100 : SPEED_10; + ecmd->duplex = tp->full_duplex ? DUPLEX_FULL : DUPLEX_HALF; + ecmd->maxtxpkt = TX_RING_SIZE / 2; + ecmd->maxrxpkt = 0; + return 0; +} + +static int xircom_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd) +{ + struct xircom_private *tp = netdev_priv(dev); + u16 autoneg, speed100, full_duplex; + + autoneg = (ecmd->autoneg == AUTONEG_ENABLE); + speed100 = (ecmd->speed == SPEED_100); + full_duplex = (ecmd->duplex == DUPLEX_FULL); + + tp->autoneg = autoneg; + if (speed100 != tp->speed100 || + full_duplex != tp->full_duplex) { + tp->speed100 = speed100; + tp->full_duplex = full_duplex; + /* change advertising bits */ + tp->advertising[0] &= ~(ADVERTISE_10HALF | + ADVERTISE_10FULL | + ADVERTISE_100HALF | + ADVERTISE_100FULL | + ADVERTISE_100BASE4); + if (speed100) { + if (full_duplex) + tp->advertising[0] |= ADVERTISE_100FULL; + else + tp->advertising[0] |= ADVERTISE_100HALF; + } else { + if (full_duplex) + tp->advertising[0] |= ADVERTISE_10FULL; + else + tp->advertising[0] |= ADVERTISE_10HALF; + } + } + check_duplex(dev); + return 0; +} + +static void xircom_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) +{ + struct xircom_private *tp = netdev_priv(dev); + strcpy(info->driver, DRV_NAME); + strcpy(info->version, DRV_VERSION); + strcpy(info->bus_info, pci_name(tp->pdev)); +} + +static struct ethtool_ops ops = { + .get_settings = xircom_get_settings, + .set_settings = xircom_set_settings, + .get_drvinfo = xircom_get_drvinfo, +}; + +/* Provide ioctl() calls to examine the MII xcvr state. */ +static int xircom_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct xircom_private *tp = netdev_priv(dev); + u16 *data = (u16 *)&rq->ifr_ifru; + int phy = tp->phys[0] & 0x1f; + unsigned long flags; + + switch(cmd) { + /* Legacy mii-diag interface */ + case SIOCGMIIPHY: /* Get address of MII PHY in use. */ + if (tp->mii_cnt) + data[0] = phy; + else + return -ENODEV; + return 0; + case SIOCGMIIREG: /* Read MII PHY register. */ + save_flags(flags); + cli(); + data[3] = mdio_read(dev, data[0] & 0x1f, data[1] & 0x1f); + restore_flags(flags); + return 0; + case SIOCSMIIREG: /* Write MII PHY register. */ + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + save_flags(flags); + cli(); + if (data[0] == tp->phys[0]) { + u16 value = data[2]; + switch (data[1]) { + case 0: + if (value & (BMCR_RESET | BMCR_ANENABLE)) + /* Autonegotiation. */ + tp->autoneg = 1; + else { + tp->full_duplex = (value & BMCR_FULLDPLX) ? 1 : 0; + tp->autoneg = 0; + } + break; + case 4: + tp->advertising[0] = value; + break; + } + check_duplex(dev); + } + mdio_write(dev, data[0] & 0x1f, data[1] & 0x1f, data[2]); + restore_flags(flags); + return 0; + default: + return -EOPNOTSUPP; + } + + return -EOPNOTSUPP; +} + +/* Set or clear the multicast filter for this adaptor. + Note that we only use exclusion around actually queueing the + new frame, not around filling tp->setup_frame. This is non-deterministic + when re-entered but still correct. */ +static void set_rx_mode(struct net_device *dev) +{ + struct xircom_private *tp = netdev_priv(dev); + struct dev_mc_list *mclist; + long ioaddr = dev->base_addr; + int csr6 = inl(ioaddr + CSR6); + u16 *eaddrs, *setup_frm; + u32 tx_flags; + int i; + + tp->csr6 &= ~(AllMultiBit | PromiscBit | HashFilterBit); + csr6 &= ~(AllMultiBit | PromiscBit | HashFilterBit); + if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ + tp->csr6 |= PromiscBit; + csr6 |= PromiscBit; + goto out; + } + + if ((dev->mc_count > 1000) || (dev->flags & IFF_ALLMULTI)) { + /* Too many to filter well -- accept all multicasts. */ + tp->csr6 |= AllMultiBit; + csr6 |= AllMultiBit; + goto out; + } + + tx_flags = Tx1WholePkt | Tx1SetupPkt | PKT_SETUP_SZ; + + /* Note that only the low-address shortword of setup_frame is valid! */ + setup_frm = tp->setup_frame; + mclist = dev->mc_list; + + /* Fill the first entry with our physical address. */ + eaddrs = (u16 *)dev->dev_addr; + *setup_frm = cpu_to_le16(eaddrs[0]); setup_frm += 2; + *setup_frm = cpu_to_le16(eaddrs[1]); setup_frm += 2; + *setup_frm = cpu_to_le16(eaddrs[2]); setup_frm += 2; + + if (dev->mc_count > 14) { /* Must use a multicast hash table. */ + u32 *hash_table = (u32 *)(tp->setup_frame + 4 * 12); + u32 hash, hash2; + + tx_flags |= Tx1HashSetup; + tp->csr6 |= HashFilterBit; + csr6 |= HashFilterBit; + + /* Fill the unused 3 entries with the broadcast address. + At least one entry *must* contain the broadcast address!!!*/ + for (i = 0; i < 3; i++) { + *setup_frm = 0xffff; setup_frm += 2; + *setup_frm = 0xffff; setup_frm += 2; + *setup_frm = 0xffff; setup_frm += 2; + } + + /* Truly brain-damaged hash filter layout */ + /* XXX: not sure if I should take the last or the first 9 bits */ + for (i = 0; i < dev->mc_count; i++, mclist = mclist->next) { + u32 *hptr; + hash = ether_crc(ETH_ALEN, mclist->dmi_addr) & 0x1ff; + if (hash < 384) { + hash2 = hash + ((hash >> 4) << 4) + + ((hash >> 5) << 5); + } else { + hash -= 384; + hash2 = 64 + hash + (hash >> 4) * 80; + } + hptr = &hash_table[hash2 & ~0x1f]; + *hptr |= cpu_to_le32(1 << (hash2 & 0x1f)); + } + } else { + /* We have <= 14 mcast addresses so we can use Xircom's + wonderful 16-address perfect filter. */ + for (i = 0; i < dev->mc_count; i++, mclist = mclist->next) { + eaddrs = (u16 *)mclist->dmi_addr; + *setup_frm = cpu_to_le16(eaddrs[0]); setup_frm += 2; + *setup_frm = cpu_to_le16(eaddrs[1]); setup_frm += 2; + *setup_frm = cpu_to_le16(eaddrs[2]); setup_frm += 2; + } + /* Fill the unused entries with the broadcast address. + At least one entry *must* contain the broadcast address!!!*/ + for (; i < 15; i++) { + *setup_frm = 0xffff; setup_frm += 2; + *setup_frm = 0xffff; setup_frm += 2; + *setup_frm = 0xffff; setup_frm += 2; + } + } + + /* Now add this frame to the Tx list. */ + if (tp->cur_tx - tp->dirty_tx > TX_RING_SIZE - 2) { + /* Same setup recently queued, we need not add it. */ + /* XXX: Huh? All it means is that the Tx list is full...*/ + } else { + unsigned long flags; + unsigned int entry; + int dummy = -1; + + save_flags(flags); cli(); + entry = tp->cur_tx++ % TX_RING_SIZE; + + if (entry != 0) { + /* Avoid a chip errata by prefixing a dummy entry. */ + tp->tx_skbuff[entry] = NULL; + tp->tx_ring[entry].length = + (entry == TX_RING_SIZE - 1) ? Tx1RingWrap : 0; + tp->tx_ring[entry].buffer1 = 0; + /* race with chip, set Tx0DescOwned later */ + dummy = entry; + entry = tp->cur_tx++ % TX_RING_SIZE; + } + + tp->tx_skbuff[entry] = NULL; + /* Put the setup frame on the Tx list. */ + if (entry == TX_RING_SIZE - 1) + tx_flags |= Tx1RingWrap; /* Wrap ring. */ + tp->tx_ring[entry].length = tx_flags; + tp->tx_ring[entry].buffer1 = virt_to_bus(tp->setup_frame); + tp->tx_ring[entry].status = Tx0DescOwned; + if (tp->cur_tx - tp->dirty_tx >= TX_RING_SIZE - 2) { + tp->tx_full = 1; + netif_stop_queue (dev); + } + if (dummy >= 0) + tp->tx_ring[dummy].status = Tx0DescOwned; + restore_flags(flags); + /* Trigger an immediate transmit demand. */ + outl(0, ioaddr + CSR1); + } + +out: + outl_CSR6(csr6, ioaddr); +} + + +static struct pci_device_id xircom_pci_table[] = { + { 0x115D, 0x0003, PCI_ANY_ID, PCI_ANY_ID, 0, 0, X3201_3 }, + {0}, +}; +MODULE_DEVICE_TABLE(pci, xircom_pci_table); + + +#ifdef CONFIG_PM +static int xircom_suspend(struct pci_dev *pdev, u32 state) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct xircom_private *tp = netdev_priv(dev); + printk(KERN_INFO "xircom_suspend(%s)\n", dev->name); + if (tp->open) + xircom_down(dev); + + pci_save_state(pdev); + pci_disable_device(pdev); + pci_set_power_state(pdev, 3); + + return 0; +} + + +static int xircom_resume(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct xircom_private *tp = netdev_priv(dev); + printk(KERN_INFO "xircom_resume(%s)\n", dev->name); + + pci_set_power_state(pdev,0); + pci_enable_device(pdev); + pci_restore_state(pdev); + + /* Bring the chip out of sleep mode. + Caution: Snooze mode does not work with some boards! */ + if (xircom_tbl[tp->chip_id].flags & HAS_ACPI) + pci_write_config_dword(tp->pdev, PCI_POWERMGMT, 0); + + transceiver_voodoo(dev); + if (xircom_tbl[tp->chip_id].flags & HAS_MII) + check_duplex(dev); + + if (tp->open) + xircom_up(dev); + return 0; +} +#endif /* CONFIG_PM */ + + +static void __devexit xircom_remove_one(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + + printk(KERN_INFO "xircom_remove_one(%s)\n", dev->name); + unregister_netdev(dev); + pci_release_regions(pdev); + free_netdev(dev); + pci_set_drvdata(pdev, NULL); +} + + +static struct pci_driver xircom_driver = { + .name = DRV_NAME, + .id_table = xircom_pci_table, + .probe = xircom_init_one, + .remove = __devexit_p(xircom_remove_one), +#ifdef CONFIG_PM + .suspend = xircom_suspend, + .resume = xircom_resume +#endif /* CONFIG_PM */ +}; + + +static int __init xircom_init(void) +{ +/* when a module, this is printed whether or not devices are found in probe */ +#ifdef MODULE + printk(version); +#endif + return pci_module_init(&xircom_driver); +} + + +static void __exit xircom_exit(void) +{ + pci_unregister_driver(&xircom_driver); +} + +module_init(xircom_init) +module_exit(xircom_exit) + +/* + * Local variables: + * c-indent-level: 4 + * c-basic-offset: 4 + * tab-width: 4 + * End: + */ |