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1165 lines
33 KiB
1165 lines
33 KiB
/* 3c574.c: A PCMCIA ethernet driver for the 3com 3c574 "RoadRunner". |
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Written 1993-1998 by |
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Donald Becker, [email protected], (driver core) and |
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David Hinds, [email protected] (from his PC card code). |
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Locking fixes (C) Copyright 2003 Red Hat Inc |
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This software may be used and distributed according to the terms of |
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the GNU General Public License, incorporated herein by reference. |
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This driver derives from Donald Becker's 3c509 core, which has the |
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following copyright: |
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Copyright 1993 United States Government as represented by the |
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Director, National Security Agency. |
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*/ |
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/* |
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Theory of Operation |
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|
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I. Board Compatibility |
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This device driver is designed for the 3Com 3c574 PC card Fast Ethernet |
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Adapter. |
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II. Board-specific settings |
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None -- PC cards are autoconfigured. |
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III. Driver operation |
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The 3c574 uses a Boomerang-style interface, without the bus-master capability. |
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See the Boomerang driver and documentation for most details. |
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IV. Notes and chip documentation. |
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Two added registers are used to enhance PIO performance, RunnerRdCtrl and |
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RunnerWrCtrl. These are 11 bit down-counters that are preloaded with the |
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count of word (16 bits) reads or writes the driver is about to do to the Rx |
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or Tx FIFO. The chip is then able to hide the internal-PCI-bus to PC-card |
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translation latency by buffering the I/O operations with an 8 word FIFO. |
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Note: No other chip accesses are permitted when this buffer is used. |
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A second enhancement is that both attribute and common memory space |
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0x0800-0x0fff can translated to the PIO FIFO. Thus memory operations (faster |
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with *some* PCcard bridges) may be used instead of I/O operations. |
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This is enabled by setting the 0x10 bit in the PCMCIA LAN COR. |
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Some slow PC card bridges work better if they never see a WAIT signal. |
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This is configured by setting the 0x20 bit in the PCMCIA LAN COR. |
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Only do this after testing that it is reliable and improves performance. |
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The upper five bits of RunnerRdCtrl are used to window into PCcard |
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configuration space registers. Window 0 is the regular Boomerang/Odie |
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register set, 1-5 are various PC card control registers, and 16-31 are |
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the (reversed!) CIS table. |
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|
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A final note: writing the InternalConfig register in window 3 with an |
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invalid ramWidth is Very Bad. |
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V. References |
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http://www.scyld.com/expert/NWay.html |
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http://www.national.com/opf/DP/DP83840A.html |
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Thanks to Terry Murphy of 3Com for providing development information for |
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earlier 3Com products. |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/string.h> |
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#include <linux/timer.h> |
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#include <linux/interrupt.h> |
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#include <linux/in.h> |
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#include <linux/delay.h> |
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/skbuff.h> |
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#include <linux/if_arp.h> |
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#include <linux/ioport.h> |
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#include <linux/bitops.h> |
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#include <linux/mii.h> |
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#include <pcmcia/cistpl.h> |
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#include <pcmcia/cisreg.h> |
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#include <pcmcia/ciscode.h> |
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#include <pcmcia/ds.h> |
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#include <linux/uaccess.h> |
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#include <asm/io.h> |
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/*====================================================================*/ |
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/* Module parameters */ |
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MODULE_AUTHOR("David Hinds <[email protected]>"); |
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MODULE_DESCRIPTION("3Com 3c574 series PCMCIA ethernet driver"); |
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MODULE_LICENSE("GPL"); |
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#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0) |
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/* Maximum events (Rx packets, etc.) to handle at each interrupt. */ |
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INT_MODULE_PARM(max_interrupt_work, 32); |
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/* Force full duplex modes? */ |
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INT_MODULE_PARM(full_duplex, 0); |
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/* Autodetect link polarity reversal? */ |
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INT_MODULE_PARM(auto_polarity, 1); |
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/*====================================================================*/ |
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/* Time in jiffies before concluding the transmitter is hung. */ |
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#define TX_TIMEOUT ((800*HZ)/1000) |
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|
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/* To minimize the size of the driver source and make the driver more |
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readable not all constants are symbolically defined. |
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You'll need the manual if you want to understand driver details anyway. */ |
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/* Offsets from base I/O address. */ |
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#define EL3_DATA 0x00 |
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#define EL3_CMD 0x0e |
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#define EL3_STATUS 0x0e |
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#define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD) |
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/* The top five bits written to EL3_CMD are a command, the lower |
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11 bits are the parameter, if applicable. */ |
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enum el3_cmds { |
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TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11, |
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RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11, |
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TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11, |
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FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11, |
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SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11, |
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SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11, |
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StatsDisable = 22<<11, StopCoax = 23<<11, |
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}; |
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enum elxl_status { |
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IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004, |
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TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020, |
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IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000 }; |
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/* The SetRxFilter command accepts the following classes: */ |
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enum RxFilter { |
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RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8 |
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}; |
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enum Window0 { |
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Wn0EepromCmd = 10, Wn0EepromData = 12, /* EEPROM command/address, data. */ |
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IntrStatus=0x0E, /* Valid in all windows. */ |
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}; |
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/* These assumes the larger EEPROM. */ |
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enum Win0_EEPROM_cmds { |
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EEPROM_Read = 0x200, EEPROM_WRITE = 0x100, EEPROM_ERASE = 0x300, |
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EEPROM_EWENB = 0x30, /* Enable erasing/writing for 10 msec. */ |
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EEPROM_EWDIS = 0x00, /* Disable EWENB before 10 msec timeout. */ |
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}; |
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|
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/* Register window 1 offsets, the window used in normal operation. |
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On the "Odie" this window is always mapped at offsets 0x10-0x1f. |
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Except for TxFree, which is overlapped by RunnerWrCtrl. */ |
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enum Window1 { |
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TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14, |
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RxStatus = 0x18, Timer=0x1A, TxStatus = 0x1B, |
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TxFree = 0x0C, /* Remaining free bytes in Tx buffer. */ |
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RunnerRdCtrl = 0x16, RunnerWrCtrl = 0x1c, |
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}; |
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enum Window3 { /* Window 3: MAC/config bits. */ |
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Wn3_Config=0, Wn3_MAC_Ctrl=6, Wn3_Options=8, |
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}; |
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enum wn3_config { |
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Ram_size = 7, |
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Ram_width = 8, |
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Ram_speed = 0x30, |
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Rom_size = 0xc0, |
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Ram_split_shift = 16, |
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Ram_split = 3 << Ram_split_shift, |
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Xcvr_shift = 20, |
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Xcvr = 7 << Xcvr_shift, |
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Autoselect = 0x1000000, |
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}; |
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enum Window4 { /* Window 4: Xcvr/media bits. */ |
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Wn4_FIFODiag = 4, Wn4_NetDiag = 6, Wn4_PhysicalMgmt=8, Wn4_Media = 10, |
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}; |
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#define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */ |
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struct el3_private { |
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struct pcmcia_device *p_dev; |
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u16 advertising, partner; /* NWay media advertisement */ |
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unsigned char phys; /* MII device address */ |
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unsigned int autoselect:1, default_media:3; /* Read from the EEPROM/Wn3_Config. */ |
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/* for transceiver monitoring */ |
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struct timer_list media; |
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unsigned short media_status; |
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unsigned short fast_poll; |
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unsigned long last_irq; |
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spinlock_t window_lock; /* Guards the Window selection */ |
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}; |
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|
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/* Set iff a MII transceiver on any interface requires mdio preamble. |
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This only set with the original DP83840 on older 3c905 boards, so the extra |
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code size of a per-interface flag is not worthwhile. */ |
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static char mii_preamble_required = 0; |
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|
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/* Index of functions. */ |
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static int tc574_config(struct pcmcia_device *link); |
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static void tc574_release(struct pcmcia_device *link); |
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static void mdio_sync(unsigned int ioaddr, int bits); |
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static int mdio_read(unsigned int ioaddr, int phy_id, int location); |
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static void mdio_write(unsigned int ioaddr, int phy_id, int location, |
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int value); |
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static unsigned short read_eeprom(unsigned int ioaddr, int index); |
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static void tc574_wait_for_completion(struct net_device *dev, int cmd); |
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static void tc574_reset(struct net_device *dev); |
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static void media_check(struct timer_list *t); |
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static int el3_open(struct net_device *dev); |
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static netdev_tx_t el3_start_xmit(struct sk_buff *skb, |
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struct net_device *dev); |
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static irqreturn_t el3_interrupt(int irq, void *dev_id); |
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static void update_stats(struct net_device *dev); |
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static struct net_device_stats *el3_get_stats(struct net_device *dev); |
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static int el3_rx(struct net_device *dev, int worklimit); |
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static int el3_close(struct net_device *dev); |
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static void el3_tx_timeout(struct net_device *dev, unsigned int txqueue); |
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static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); |
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static void set_rx_mode(struct net_device *dev); |
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static void set_multicast_list(struct net_device *dev); |
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static void tc574_detach(struct pcmcia_device *p_dev); |
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/* |
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tc574_attach() creates an "instance" of the driver, allocating |
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local data structures for one device. The device is registered |
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with Card Services. |
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*/ |
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static const struct net_device_ops el3_netdev_ops = { |
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.ndo_open = el3_open, |
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.ndo_stop = el3_close, |
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.ndo_start_xmit = el3_start_xmit, |
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.ndo_tx_timeout = el3_tx_timeout, |
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.ndo_get_stats = el3_get_stats, |
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.ndo_eth_ioctl = el3_ioctl, |
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.ndo_set_rx_mode = set_multicast_list, |
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.ndo_set_mac_address = eth_mac_addr, |
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.ndo_validate_addr = eth_validate_addr, |
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}; |
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static int tc574_probe(struct pcmcia_device *link) |
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{ |
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struct el3_private *lp; |
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struct net_device *dev; |
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dev_dbg(&link->dev, "3c574_attach()\n"); |
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/* Create the PC card device object. */ |
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dev = alloc_etherdev(sizeof(struct el3_private)); |
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if (!dev) |
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return -ENOMEM; |
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lp = netdev_priv(dev); |
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link->priv = dev; |
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lp->p_dev = link; |
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spin_lock_init(&lp->window_lock); |
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link->resource[0]->end = 32; |
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link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16; |
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link->config_flags |= CONF_ENABLE_IRQ; |
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link->config_index = 1; |
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dev->netdev_ops = &el3_netdev_ops; |
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dev->watchdog_timeo = TX_TIMEOUT; |
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return tc574_config(link); |
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} |
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static void tc574_detach(struct pcmcia_device *link) |
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{ |
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struct net_device *dev = link->priv; |
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dev_dbg(&link->dev, "3c574_detach()\n"); |
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unregister_netdev(dev); |
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tc574_release(link); |
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free_netdev(dev); |
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} /* tc574_detach */ |
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static const char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"}; |
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static int tc574_config(struct pcmcia_device *link) |
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{ |
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struct net_device *dev = link->priv; |
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struct el3_private *lp = netdev_priv(dev); |
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int ret, i, j; |
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unsigned int ioaddr; |
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__be16 *phys_addr; |
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char *cardname; |
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__u32 config; |
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u8 *buf; |
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size_t len; |
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phys_addr = (__be16 *)dev->dev_addr; |
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dev_dbg(&link->dev, "3c574_config()\n"); |
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link->io_lines = 16; |
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for (i = j = 0; j < 0x400; j += 0x20) { |
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link->resource[0]->start = j ^ 0x300; |
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i = pcmcia_request_io(link); |
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if (i == 0) |
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break; |
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} |
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if (i != 0) |
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goto failed; |
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ret = pcmcia_request_irq(link, el3_interrupt); |
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if (ret) |
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goto failed; |
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ret = pcmcia_enable_device(link); |
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if (ret) |
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goto failed; |
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dev->irq = link->irq; |
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dev->base_addr = link->resource[0]->start; |
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ioaddr = dev->base_addr; |
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/* The 3c574 normally uses an EEPROM for configuration info, including |
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the hardware address. The future products may include a modem chip |
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and put the address in the CIS. */ |
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len = pcmcia_get_tuple(link, 0x88, &buf); |
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if (buf && len >= 6) { |
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for (i = 0; i < 3; i++) |
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phys_addr[i] = htons(le16_to_cpu(buf[i * 2])); |
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kfree(buf); |
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} else { |
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kfree(buf); /* 0 < len < 6 */ |
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EL3WINDOW(0); |
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for (i = 0; i < 3; i++) |
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phys_addr[i] = htons(read_eeprom(ioaddr, i + 10)); |
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if (phys_addr[0] == htons(0x6060)) { |
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pr_notice("IO port conflict at 0x%03lx-0x%03lx\n", |
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dev->base_addr, dev->base_addr+15); |
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goto failed; |
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} |
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} |
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if (link->prod_id[1]) |
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cardname = link->prod_id[1]; |
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else |
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cardname = "3Com 3c574"; |
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{ |
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u_char mcr; |
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outw(2<<11, ioaddr + RunnerRdCtrl); |
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mcr = inb(ioaddr + 2); |
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outw(0<<11, ioaddr + RunnerRdCtrl); |
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pr_info(" ASIC rev %d,", mcr>>3); |
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EL3WINDOW(3); |
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config = inl(ioaddr + Wn3_Config); |
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lp->default_media = (config & Xcvr) >> Xcvr_shift; |
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lp->autoselect = config & Autoselect ? 1 : 0; |
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} |
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timer_setup(&lp->media, media_check, 0); |
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{ |
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int phy; |
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/* Roadrunner only: Turn on the MII transceiver */ |
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outw(0x8040, ioaddr + Wn3_Options); |
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mdelay(1); |
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outw(0xc040, ioaddr + Wn3_Options); |
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tc574_wait_for_completion(dev, TxReset); |
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tc574_wait_for_completion(dev, RxReset); |
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mdelay(1); |
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outw(0x8040, ioaddr + Wn3_Options); |
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EL3WINDOW(4); |
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for (phy = 1; phy <= 32; phy++) { |
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int mii_status; |
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mdio_sync(ioaddr, 32); |
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mii_status = mdio_read(ioaddr, phy & 0x1f, 1); |
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if (mii_status != 0xffff) { |
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lp->phys = phy & 0x1f; |
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dev_dbg(&link->dev, " MII transceiver at " |
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"index %d, status %x.\n", |
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phy, mii_status); |
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if ((mii_status & 0x0040) == 0) |
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mii_preamble_required = 1; |
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break; |
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} |
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} |
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if (phy > 32) { |
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pr_notice(" No MII transceivers found!\n"); |
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goto failed; |
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} |
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i = mdio_read(ioaddr, lp->phys, 16) | 0x40; |
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mdio_write(ioaddr, lp->phys, 16, i); |
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lp->advertising = mdio_read(ioaddr, lp->phys, 4); |
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if (full_duplex) { |
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/* Only advertise the FD media types. */ |
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lp->advertising &= ~0x02a0; |
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mdio_write(ioaddr, lp->phys, 4, lp->advertising); |
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} |
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} |
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SET_NETDEV_DEV(dev, &link->dev); |
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if (register_netdev(dev) != 0) { |
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pr_notice("register_netdev() failed\n"); |
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goto failed; |
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} |
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netdev_info(dev, "%s at io %#3lx, irq %d, hw_addr %pM\n", |
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cardname, dev->base_addr, dev->irq, dev->dev_addr); |
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netdev_info(dev, " %dK FIFO split %s Rx:Tx, %sMII interface.\n", |
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8 << (config & Ram_size), |
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ram_split[(config & Ram_split) >> Ram_split_shift], |
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config & Autoselect ? "autoselect " : ""); |
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|
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return 0; |
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|
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failed: |
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tc574_release(link); |
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return -ENODEV; |
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|
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} /* tc574_config */ |
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static void tc574_release(struct pcmcia_device *link) |
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{ |
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pcmcia_disable_device(link); |
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} |
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static int tc574_suspend(struct pcmcia_device *link) |
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{ |
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struct net_device *dev = link->priv; |
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|
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if (link->open) |
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netif_device_detach(dev); |
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|
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return 0; |
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} |
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|
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static int tc574_resume(struct pcmcia_device *link) |
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{ |
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struct net_device *dev = link->priv; |
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|
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if (link->open) { |
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tc574_reset(dev); |
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netif_device_attach(dev); |
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} |
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|
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return 0; |
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} |
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|
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static void dump_status(struct net_device *dev) |
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{ |
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unsigned int ioaddr = dev->base_addr; |
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EL3WINDOW(1); |
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netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x, tx free %04x\n", |
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inw(ioaddr+EL3_STATUS), |
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inw(ioaddr+RxStatus), inb(ioaddr+TxStatus), |
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inw(ioaddr+TxFree)); |
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EL3WINDOW(4); |
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netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n", |
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inw(ioaddr+0x04), inw(ioaddr+0x06), |
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inw(ioaddr+0x08), inw(ioaddr+0x0a)); |
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EL3WINDOW(1); |
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} |
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|
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/* |
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Use this for commands that may take time to finish |
|
*/ |
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static void tc574_wait_for_completion(struct net_device *dev, int cmd) |
|
{ |
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int i = 1500; |
|
outw(cmd, dev->base_addr + EL3_CMD); |
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while (--i > 0) |
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if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break; |
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if (i == 0) |
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netdev_notice(dev, "command 0x%04x did not complete!\n", cmd); |
|
} |
|
|
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/* Read a word from the EEPROM using the regular EEPROM access register. |
|
Assume that we are in register window zero. |
|
*/ |
|
static unsigned short read_eeprom(unsigned int ioaddr, int index) |
|
{ |
|
int timer; |
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outw(EEPROM_Read + index, ioaddr + Wn0EepromCmd); |
|
/* Pause for at least 162 usec for the read to take place. */ |
|
for (timer = 1620; timer >= 0; timer--) { |
|
if ((inw(ioaddr + Wn0EepromCmd) & 0x8000) == 0) |
|
break; |
|
} |
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return inw(ioaddr + Wn0EepromData); |
|
} |
|
|
|
/* MII transceiver control section. |
|
Read and write the MII registers using software-generated serial |
|
MDIO protocol. See the MII specifications or DP83840A data sheet |
|
for details. |
|
The maxium data clock rate is 2.5 Mhz. The timing is easily met by the |
|
slow PC card interface. */ |
|
|
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#define MDIO_SHIFT_CLK 0x01 |
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#define MDIO_DIR_WRITE 0x04 |
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#define MDIO_DATA_WRITE0 (0x00 | MDIO_DIR_WRITE) |
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#define MDIO_DATA_WRITE1 (0x02 | MDIO_DIR_WRITE) |
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#define MDIO_DATA_READ 0x02 |
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#define MDIO_ENB_IN 0x00 |
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|
|
/* Generate the preamble required for initial synchronization and |
|
a few older transceivers. */ |
|
static void mdio_sync(unsigned int ioaddr, int bits) |
|
{ |
|
unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt; |
|
|
|
/* Establish sync by sending at least 32 logic ones. */ |
|
while (-- bits >= 0) { |
|
outw(MDIO_DATA_WRITE1, mdio_addr); |
|
outw(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr); |
|
} |
|
} |
|
|
|
static int mdio_read(unsigned int ioaddr, int phy_id, int location) |
|
{ |
|
int i; |
|
int read_cmd = (0xf6 << 10) | (phy_id << 5) | location; |
|
unsigned int retval = 0; |
|
unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt; |
|
|
|
if (mii_preamble_required) |
|
mdio_sync(ioaddr, 32); |
|
|
|
/* Shift the read command bits out. */ |
|
for (i = 14; i >= 0; i--) { |
|
int dataval = (read_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; |
|
outw(dataval, mdio_addr); |
|
outw(dataval | MDIO_SHIFT_CLK, mdio_addr); |
|
} |
|
/* Read the two transition, 16 data, and wire-idle bits. */ |
|
for (i = 19; i > 0; i--) { |
|
outw(MDIO_ENB_IN, mdio_addr); |
|
retval = (retval << 1) | ((inw(mdio_addr) & MDIO_DATA_READ) ? 1 : 0); |
|
outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr); |
|
} |
|
return (retval>>1) & 0xffff; |
|
} |
|
|
|
static void mdio_write(unsigned int ioaddr, int phy_id, int location, int value) |
|
{ |
|
int write_cmd = 0x50020000 | (phy_id << 23) | (location << 18) | value; |
|
unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt; |
|
int i; |
|
|
|
if (mii_preamble_required) |
|
mdio_sync(ioaddr, 32); |
|
|
|
/* Shift the command bits out. */ |
|
for (i = 31; i >= 0; i--) { |
|
int dataval = (write_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; |
|
outw(dataval, mdio_addr); |
|
outw(dataval | MDIO_SHIFT_CLK, mdio_addr); |
|
} |
|
/* Leave the interface idle. */ |
|
for (i = 1; i >= 0; i--) { |
|
outw(MDIO_ENB_IN, mdio_addr); |
|
outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr); |
|
} |
|
} |
|
|
|
/* Reset and restore all of the 3c574 registers. */ |
|
static void tc574_reset(struct net_device *dev) |
|
{ |
|
struct el3_private *lp = netdev_priv(dev); |
|
int i; |
|
unsigned int ioaddr = dev->base_addr; |
|
unsigned long flags; |
|
|
|
tc574_wait_for_completion(dev, TotalReset|0x10); |
|
|
|
spin_lock_irqsave(&lp->window_lock, flags); |
|
/* Clear any transactions in progress. */ |
|
outw(0, ioaddr + RunnerWrCtrl); |
|
outw(0, ioaddr + RunnerRdCtrl); |
|
|
|
/* Set the station address and mask. */ |
|
EL3WINDOW(2); |
|
for (i = 0; i < 6; i++) |
|
outb(dev->dev_addr[i], ioaddr + i); |
|
for (; i < 12; i+=2) |
|
outw(0, ioaddr + i); |
|
|
|
/* Reset config options */ |
|
EL3WINDOW(3); |
|
outb((dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl); |
|
outl((lp->autoselect ? 0x01000000 : 0) | 0x0062001b, |
|
ioaddr + Wn3_Config); |
|
/* Roadrunner only: Turn on the MII transceiver. */ |
|
outw(0x8040, ioaddr + Wn3_Options); |
|
mdelay(1); |
|
outw(0xc040, ioaddr + Wn3_Options); |
|
EL3WINDOW(1); |
|
spin_unlock_irqrestore(&lp->window_lock, flags); |
|
|
|
tc574_wait_for_completion(dev, TxReset); |
|
tc574_wait_for_completion(dev, RxReset); |
|
mdelay(1); |
|
spin_lock_irqsave(&lp->window_lock, flags); |
|
EL3WINDOW(3); |
|
outw(0x8040, ioaddr + Wn3_Options); |
|
|
|
/* Switch to the stats window, and clear all stats by reading. */ |
|
outw(StatsDisable, ioaddr + EL3_CMD); |
|
EL3WINDOW(6); |
|
for (i = 0; i < 10; i++) |
|
inb(ioaddr + i); |
|
inw(ioaddr + 10); |
|
inw(ioaddr + 12); |
|
EL3WINDOW(4); |
|
inb(ioaddr + 12); |
|
inb(ioaddr + 13); |
|
|
|
/* .. enable any extra statistics bits.. */ |
|
outw(0x0040, ioaddr + Wn4_NetDiag); |
|
|
|
EL3WINDOW(1); |
|
spin_unlock_irqrestore(&lp->window_lock, flags); |
|
|
|
/* .. re-sync MII and re-fill what NWay is advertising. */ |
|
mdio_sync(ioaddr, 32); |
|
mdio_write(ioaddr, lp->phys, 4, lp->advertising); |
|
if (!auto_polarity) { |
|
/* works for TDK 78Q2120 series MII's */ |
|
i = mdio_read(ioaddr, lp->phys, 16) | 0x20; |
|
mdio_write(ioaddr, lp->phys, 16, i); |
|
} |
|
|
|
spin_lock_irqsave(&lp->window_lock, flags); |
|
/* Switch to register set 1 for normal use, just for TxFree. */ |
|
set_rx_mode(dev); |
|
spin_unlock_irqrestore(&lp->window_lock, flags); |
|
outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */ |
|
outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */ |
|
outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */ |
|
/* Allow status bits to be seen. */ |
|
outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD); |
|
/* Ack all pending events, and set active indicator mask. */ |
|
outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq, |
|
ioaddr + EL3_CMD); |
|
outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull |
|
| AdapterFailure | RxEarly, ioaddr + EL3_CMD); |
|
} |
|
|
|
static int el3_open(struct net_device *dev) |
|
{ |
|
struct el3_private *lp = netdev_priv(dev); |
|
struct pcmcia_device *link = lp->p_dev; |
|
|
|
if (!pcmcia_dev_present(link)) |
|
return -ENODEV; |
|
|
|
link->open++; |
|
netif_start_queue(dev); |
|
|
|
tc574_reset(dev); |
|
lp->media.expires = jiffies + HZ; |
|
add_timer(&lp->media); |
|
|
|
dev_dbg(&link->dev, "%s: opened, status %4.4x.\n", |
|
dev->name, inw(dev->base_addr + EL3_STATUS)); |
|
|
|
return 0; |
|
} |
|
|
|
static void el3_tx_timeout(struct net_device *dev, unsigned int txqueue) |
|
{ |
|
unsigned int ioaddr = dev->base_addr; |
|
|
|
netdev_notice(dev, "Transmit timed out!\n"); |
|
dump_status(dev); |
|
dev->stats.tx_errors++; |
|
netif_trans_update(dev); /* prevent tx timeout */ |
|
/* Issue TX_RESET and TX_START commands. */ |
|
tc574_wait_for_completion(dev, TxReset); |
|
outw(TxEnable, ioaddr + EL3_CMD); |
|
netif_wake_queue(dev); |
|
} |
|
|
|
static void pop_tx_status(struct net_device *dev) |
|
{ |
|
unsigned int ioaddr = dev->base_addr; |
|
int i; |
|
|
|
/* Clear the Tx status stack. */ |
|
for (i = 32; i > 0; i--) { |
|
u_char tx_status = inb(ioaddr + TxStatus); |
|
if (!(tx_status & 0x84)) |
|
break; |
|
/* reset transmitter on jabber error or underrun */ |
|
if (tx_status & 0x30) |
|
tc574_wait_for_completion(dev, TxReset); |
|
if (tx_status & 0x38) { |
|
pr_debug("%s: transmit error: status 0x%02x\n", |
|
dev->name, tx_status); |
|
outw(TxEnable, ioaddr + EL3_CMD); |
|
dev->stats.tx_aborted_errors++; |
|
} |
|
outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */ |
|
} |
|
} |
|
|
|
static netdev_tx_t el3_start_xmit(struct sk_buff *skb, |
|
struct net_device *dev) |
|
{ |
|
unsigned int ioaddr = dev->base_addr; |
|
struct el3_private *lp = netdev_priv(dev); |
|
unsigned long flags; |
|
|
|
pr_debug("%s: el3_start_xmit(length = %ld) called, " |
|
"status %4.4x.\n", dev->name, (long)skb->len, |
|
inw(ioaddr + EL3_STATUS)); |
|
|
|
spin_lock_irqsave(&lp->window_lock, flags); |
|
|
|
dev->stats.tx_bytes += skb->len; |
|
|
|
/* Put out the doubleword header... */ |
|
outw(skb->len, ioaddr + TX_FIFO); |
|
outw(0, ioaddr + TX_FIFO); |
|
/* ... and the packet rounded to a doubleword. */ |
|
outsl(ioaddr + TX_FIFO, skb->data, (skb->len+3)>>2); |
|
|
|
/* TxFree appears only in Window 1, not offset 0x1c. */ |
|
if (inw(ioaddr + TxFree) <= 1536) { |
|
netif_stop_queue(dev); |
|
/* Interrupt us when the FIFO has room for max-sized packet. |
|
The threshold is in units of dwords. */ |
|
outw(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD); |
|
} |
|
|
|
pop_tx_status(dev); |
|
spin_unlock_irqrestore(&lp->window_lock, flags); |
|
dev_kfree_skb(skb); |
|
return NETDEV_TX_OK; |
|
} |
|
|
|
/* The EL3 interrupt handler. */ |
|
static irqreturn_t el3_interrupt(int irq, void *dev_id) |
|
{ |
|
struct net_device *dev = (struct net_device *) dev_id; |
|
struct el3_private *lp = netdev_priv(dev); |
|
unsigned int ioaddr; |
|
unsigned status; |
|
int work_budget = max_interrupt_work; |
|
int handled = 0; |
|
|
|
if (!netif_device_present(dev)) |
|
return IRQ_NONE; |
|
ioaddr = dev->base_addr; |
|
|
|
pr_debug("%s: interrupt, status %4.4x.\n", |
|
dev->name, inw(ioaddr + EL3_STATUS)); |
|
|
|
spin_lock(&lp->window_lock); |
|
|
|
while ((status = inw(ioaddr + EL3_STATUS)) & |
|
(IntLatch | RxComplete | RxEarly | StatsFull)) { |
|
if (!netif_device_present(dev) || |
|
((status & 0xe000) != 0x2000)) { |
|
pr_debug("%s: Interrupt from dead card\n", dev->name); |
|
break; |
|
} |
|
|
|
handled = 1; |
|
|
|
if (status & RxComplete) |
|
work_budget = el3_rx(dev, work_budget); |
|
|
|
if (status & TxAvailable) { |
|
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 & TxComplete) |
|
pop_tx_status(dev); |
|
|
|
if (status & (AdapterFailure | RxEarly | StatsFull)) { |
|
/* Handle all uncommon interrupts. */ |
|
if (status & StatsFull) |
|
update_stats(dev); |
|
if (status & RxEarly) { |
|
work_budget = el3_rx(dev, work_budget); |
|
outw(AckIntr | RxEarly, ioaddr + EL3_CMD); |
|
} |
|
if (status & AdapterFailure) { |
|
u16 fifo_diag; |
|
EL3WINDOW(4); |
|
fifo_diag = inw(ioaddr + Wn4_FIFODiag); |
|
EL3WINDOW(1); |
|
netdev_notice(dev, "adapter failure, FIFO diagnostic register %04x\n", |
|
fifo_diag); |
|
if (fifo_diag & 0x0400) { |
|
/* Tx overrun */ |
|
tc574_wait_for_completion(dev, TxReset); |
|
outw(TxEnable, ioaddr + EL3_CMD); |
|
} |
|
if (fifo_diag & 0x2000) { |
|
/* Rx underrun */ |
|
tc574_wait_for_completion(dev, RxReset); |
|
set_rx_mode(dev); |
|
outw(RxEnable, ioaddr + EL3_CMD); |
|
} |
|
outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD); |
|
} |
|
} |
|
|
|
if (--work_budget < 0) { |
|
pr_debug("%s: Too much work in interrupt, " |
|
"status %4.4x.\n", dev->name, status); |
|
/* Clear all interrupts */ |
|
outw(AckIntr | 0xFF, ioaddr + EL3_CMD); |
|
break; |
|
} |
|
/* Acknowledge the IRQ. */ |
|
outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD); |
|
} |
|
|
|
pr_debug("%s: exiting interrupt, status %4.4x.\n", |
|
dev->name, inw(ioaddr + EL3_STATUS)); |
|
|
|
spin_unlock(&lp->window_lock); |
|
return IRQ_RETVAL(handled); |
|
} |
|
|
|
/* |
|
This timer serves two purposes: to check for missed interrupts |
|
(and as a last resort, poll the NIC for events), and to monitor |
|
the MII, reporting changes in cable status. |
|
*/ |
|
static void media_check(struct timer_list *t) |
|
{ |
|
struct el3_private *lp = from_timer(lp, t, media); |
|
struct net_device *dev = lp->p_dev->priv; |
|
unsigned int ioaddr = dev->base_addr; |
|
unsigned long flags; |
|
unsigned short /* cable, */ media, partner; |
|
|
|
if (!netif_device_present(dev)) |
|
goto reschedule; |
|
|
|
/* Check for pending interrupt with expired latency timer: with |
|
this, we can limp along even if the interrupt is blocked */ |
|
if ((inw(ioaddr + EL3_STATUS) & IntLatch) && (inb(ioaddr + Timer) == 0xff)) { |
|
if (!lp->fast_poll) |
|
netdev_info(dev, "interrupt(s) dropped!\n"); |
|
|
|
local_irq_save(flags); |
|
el3_interrupt(dev->irq, dev); |
|
local_irq_restore(flags); |
|
|
|
lp->fast_poll = HZ; |
|
} |
|
if (lp->fast_poll) { |
|
lp->fast_poll--; |
|
lp->media.expires = jiffies + 2*HZ/100; |
|
add_timer(&lp->media); |
|
return; |
|
} |
|
|
|
spin_lock_irqsave(&lp->window_lock, flags); |
|
EL3WINDOW(4); |
|
media = mdio_read(ioaddr, lp->phys, 1); |
|
partner = mdio_read(ioaddr, lp->phys, 5); |
|
EL3WINDOW(1); |
|
|
|
if (media != lp->media_status) { |
|
if ((media ^ lp->media_status) & 0x0004) |
|
netdev_info(dev, "%s link beat\n", |
|
(lp->media_status & 0x0004) ? "lost" : "found"); |
|
if ((media ^ lp->media_status) & 0x0020) { |
|
lp->partner = 0; |
|
if (lp->media_status & 0x0020) { |
|
netdev_info(dev, "autonegotiation restarted\n"); |
|
} else if (partner) { |
|
partner &= lp->advertising; |
|
lp->partner = partner; |
|
netdev_info(dev, "autonegotiation complete: " |
|
"%dbaseT-%cD selected\n", |
|
(partner & 0x0180) ? 100 : 10, |
|
(partner & 0x0140) ? 'F' : 'H'); |
|
} else { |
|
netdev_info(dev, "link partner did not autonegotiate\n"); |
|
} |
|
|
|
EL3WINDOW(3); |
|
outb((partner & 0x0140 ? 0x20 : 0) | |
|
(dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl); |
|
EL3WINDOW(1); |
|
|
|
} |
|
if (media & 0x0010) |
|
netdev_info(dev, "remote fault detected\n"); |
|
if (media & 0x0002) |
|
netdev_info(dev, "jabber detected\n"); |
|
lp->media_status = media; |
|
} |
|
spin_unlock_irqrestore(&lp->window_lock, flags); |
|
|
|
reschedule: |
|
lp->media.expires = jiffies + HZ; |
|
add_timer(&lp->media); |
|
} |
|
|
|
static struct net_device_stats *el3_get_stats(struct net_device *dev) |
|
{ |
|
struct el3_private *lp = netdev_priv(dev); |
|
|
|
if (netif_device_present(dev)) { |
|
unsigned long flags; |
|
spin_lock_irqsave(&lp->window_lock, flags); |
|
update_stats(dev); |
|
spin_unlock_irqrestore(&lp->window_lock, flags); |
|
} |
|
return &dev->stats; |
|
} |
|
|
|
/* Update statistics. |
|
Surprisingly this need not be run single-threaded, but it effectively is. |
|
The counters clear when read, so the adds must merely be atomic. |
|
*/ |
|
static void update_stats(struct net_device *dev) |
|
{ |
|
unsigned int ioaddr = dev->base_addr; |
|
u8 up; |
|
|
|
pr_debug("%s: updating the statistics.\n", dev->name); |
|
|
|
if (inw(ioaddr+EL3_STATUS) == 0xffff) /* No card. */ |
|
return; |
|
|
|
/* Unlike the 3c509 we need not turn off stats updates while reading. */ |
|
/* Switch to the stats window, and read everything. */ |
|
EL3WINDOW(6); |
|
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); |
|
up = inb(ioaddr + 9); |
|
dev->stats.tx_packets += (up&0x30) << 4; |
|
/* Rx packets */ inb(ioaddr + 7); |
|
/* Tx deferrals */ inb(ioaddr + 8); |
|
/* rx */ inw(ioaddr + 10); |
|
/* tx */ inw(ioaddr + 12); |
|
|
|
EL3WINDOW(4); |
|
/* BadSSD */ inb(ioaddr + 12); |
|
up = inb(ioaddr + 13); |
|
|
|
EL3WINDOW(1); |
|
} |
|
|
|
static int el3_rx(struct net_device *dev, int worklimit) |
|
{ |
|
unsigned int ioaddr = dev->base_addr; |
|
short rx_status; |
|
|
|
pr_debug("%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n", |
|
dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RxStatus)); |
|
while (!((rx_status = inw(ioaddr + RxStatus)) & 0x8000) && |
|
worklimit > 0) { |
|
worklimit--; |
|
if (rx_status & 0x4000) { /* Error, update stats. */ |
|
short error = rx_status & 0x3800; |
|
dev->stats.rx_errors++; |
|
switch (error) { |
|
case 0x0000: dev->stats.rx_over_errors++; break; |
|
case 0x0800: dev->stats.rx_length_errors++; break; |
|
case 0x1000: dev->stats.rx_frame_errors++; break; |
|
case 0x1800: dev->stats.rx_length_errors++; break; |
|
case 0x2000: dev->stats.rx_frame_errors++; break; |
|
case 0x2800: dev->stats.rx_crc_errors++; break; |
|
} |
|
} else { |
|
short pkt_len = rx_status & 0x7ff; |
|
struct sk_buff *skb; |
|
|
|
skb = netdev_alloc_skb(dev, pkt_len + 5); |
|
|
|
pr_debug(" Receiving packet size %d status %4.4x.\n", |
|
pkt_len, rx_status); |
|
if (skb != NULL) { |
|
skb_reserve(skb, 2); |
|
insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len), |
|
((pkt_len+3)>>2)); |
|
skb->protocol = eth_type_trans(skb, dev); |
|
netif_rx(skb); |
|
dev->stats.rx_packets++; |
|
dev->stats.rx_bytes += pkt_len; |
|
} else { |
|
pr_debug("%s: couldn't allocate a sk_buff of" |
|
" size %d.\n", dev->name, pkt_len); |
|
dev->stats.rx_dropped++; |
|
} |
|
} |
|
tc574_wait_for_completion(dev, RxDiscard); |
|
} |
|
|
|
return worklimit; |
|
} |
|
|
|
/* Provide ioctl() calls to examine the MII xcvr state. */ |
|
static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
|
{ |
|
struct el3_private *lp = netdev_priv(dev); |
|
unsigned int ioaddr = dev->base_addr; |
|
struct mii_ioctl_data *data = if_mii(rq); |
|
int phy = lp->phys & 0x1f; |
|
|
|
pr_debug("%s: In ioct(%-.6s, %#4.4x) %4.4x %4.4x %4.4x %4.4x.\n", |
|
dev->name, rq->ifr_ifrn.ifrn_name, cmd, |
|
data->phy_id, data->reg_num, data->val_in, data->val_out); |
|
|
|
switch(cmd) { |
|
case SIOCGMIIPHY: /* Get the address of the PHY in use. */ |
|
data->phy_id = phy; |
|
fallthrough; |
|
case SIOCGMIIREG: /* Read the specified MII register. */ |
|
{ |
|
int saved_window; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&lp->window_lock, flags); |
|
saved_window = inw(ioaddr + EL3_CMD) >> 13; |
|
EL3WINDOW(4); |
|
data->val_out = mdio_read(ioaddr, data->phy_id & 0x1f, |
|
data->reg_num & 0x1f); |
|
EL3WINDOW(saved_window); |
|
spin_unlock_irqrestore(&lp->window_lock, flags); |
|
return 0; |
|
} |
|
case SIOCSMIIREG: /* Write the specified MII register */ |
|
{ |
|
int saved_window; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&lp->window_lock, flags); |
|
saved_window = inw(ioaddr + EL3_CMD) >> 13; |
|
EL3WINDOW(4); |
|
mdio_write(ioaddr, data->phy_id & 0x1f, |
|
data->reg_num & 0x1f, data->val_in); |
|
EL3WINDOW(saved_window); |
|
spin_unlock_irqrestore(&lp->window_lock, flags); |
|
return 0; |
|
} |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
/* The Odie chip has a 64 bin multicast filter, but the bit layout is not |
|
documented. Until it is we revert to receiving all multicast frames when |
|
any multicast reception is desired. |
|
Note: My other drivers emit a log message whenever promiscuous mode is |
|
entered to help detect password sniffers. This is less desirable on |
|
typical PC card machines, so we omit the message. |
|
*/ |
|
|
|
static void set_rx_mode(struct net_device *dev) |
|
{ |
|
unsigned int ioaddr = dev->base_addr; |
|
|
|
if (dev->flags & IFF_PROMISC) |
|
outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm, |
|
ioaddr + EL3_CMD); |
|
else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI)) |
|
outw(SetRxFilter|RxStation|RxMulticast|RxBroadcast, ioaddr + EL3_CMD); |
|
else |
|
outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD); |
|
} |
|
|
|
static void set_multicast_list(struct net_device *dev) |
|
{ |
|
struct el3_private *lp = netdev_priv(dev); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&lp->window_lock, flags); |
|
set_rx_mode(dev); |
|
spin_unlock_irqrestore(&lp->window_lock, flags); |
|
} |
|
|
|
static int el3_close(struct net_device *dev) |
|
{ |
|
unsigned int ioaddr = dev->base_addr; |
|
struct el3_private *lp = netdev_priv(dev); |
|
struct pcmcia_device *link = lp->p_dev; |
|
|
|
dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name); |
|
|
|
if (pcmcia_dev_present(link)) { |
|
unsigned long flags; |
|
|
|
/* Turn off statistics ASAP. We update lp->stats below. */ |
|
outw(StatsDisable, ioaddr + EL3_CMD); |
|
|
|
/* Disable the receiver and transmitter. */ |
|
outw(RxDisable, ioaddr + EL3_CMD); |
|
outw(TxDisable, ioaddr + EL3_CMD); |
|
|
|
/* Note: Switching to window 0 may disable the IRQ. */ |
|
EL3WINDOW(0); |
|
spin_lock_irqsave(&lp->window_lock, flags); |
|
update_stats(dev); |
|
spin_unlock_irqrestore(&lp->window_lock, flags); |
|
|
|
/* force interrupts off */ |
|
outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD); |
|
} |
|
|
|
link->open--; |
|
netif_stop_queue(dev); |
|
del_timer_sync(&lp->media); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct pcmcia_device_id tc574_ids[] = { |
|
PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0574), |
|
PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0556, "cis/3CCFEM556.cis"), |
|
PCMCIA_DEVICE_NULL, |
|
}; |
|
MODULE_DEVICE_TABLE(pcmcia, tc574_ids); |
|
|
|
static struct pcmcia_driver tc574_driver = { |
|
.owner = THIS_MODULE, |
|
.name = "3c574_cs", |
|
.probe = tc574_probe, |
|
.remove = tc574_detach, |
|
.id_table = tc574_ids, |
|
.suspend = tc574_suspend, |
|
.resume = tc574_resume, |
|
}; |
|
module_pcmcia_driver(tc574_driver);
|
|
|