tlan.c

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/*******************************************************************************
 *
 *  Linux ThunderLAN Driver
 *
 *  tlan.c
 *  by James Banks
 *
 *  (C) 1997-1998 Caldera, Inc.
 *  (C) 1998 James Banks
 *  (C) 1999-2001 Torben Mathiasen
 *
 *  This software may be used and distributed according to the terms
 *  of the GNU General Public License, incorporated herein by reference.
 *
 ** This file is best viewed/edited with columns>=132.
 *
 ** Useful (if not required) reading:
 *
 *		Texas Instruments, ThunderLAN Programmer's Guide,
 *			TI Literature Number SPWU013A
 *			available in PDF format from www.ti.com
 *		Level One, LXT901 and LXT970 Data Sheets
 *			available in PDF format from www.level1.com
 *		National Semiconductor, DP83840A Data Sheet
 *			available in PDF format from www.national.com
 *		Microchip Technology, 24C01A/02A/04A Data Sheet
 *			available in PDF format from www.microchip.com
 *
 * Change History
 *
 *	Tigran Aivazian <[e-mail]>:	TLan_PciProbe() now uses
 *						new PCI BIOS interface.
 *	Alan Cox	<[e-mail]>:	Fixed the out of memory
 *						handling.
 *      
 *	Torben Mathiasen <[e-mail]> New Maintainer!
 *
 *	v1.1 Dec 20, 1999    - Removed linux version checking
 *			       Patch from Tigran Aivazian. 
 *			     - v1.1 includes Alan's SMP updates.
 *			     - We still have problems on SMP though,
 *			       but I'm looking into that. 
 *			
 *	v1.2 Jan 02, 2000    - Hopefully fixed the SMP deadlock.
 *			     - Removed dependency of HZ being 100.
 *			     - We now allow higher priority timers to 
 *			       overwrite timers like TLAN_TIMER_ACTIVITY
 *			       Patch from John Cagle <[e-mail]>.
 *			     - Fixed a few compiler warnings.
 *
 *	v1.3 Feb 04, 2000    - Fixed the remaining HZ issues.
 *			     - Removed call to pci_present(). 
 *			     - Removed SA_INTERRUPT flag from irq handler.
 *			     - Added __init and __initdata to reduce resisdent 
 *			       code size.
 *			     - Driver now uses module_init/module_exit.
 *			     - Rewrote init_module and tlan_probe to
 *			       share a lot more code. We now use tlan_probe
 *			       with builtin and module driver.
 *			     - Driver ported to new net API. 
 *			     - tlan.txt has been reworked to reflect current 
 *			       driver (almost)
 *			     - Other minor stuff
 *
 *	v1.4 Feb 10, 2000    - Updated with more changes required after Dave's
 *	                       network cleanup in 2.3.43pre7 (Tigran & myself)
 *	                     - Minor stuff.
 *
 *	v1.5 March 22, 2000  - Fixed another timer bug that would hang the driver
 *			       if no cable/link were present.
 *			     - Cosmetic changes.
 *			     - TODO: Port completely to new PCI/DMA API
 *			     	     Auto-Neg fallback.
 *
 * 	v1.6 April 04, 2000  - Fixed driver support for kernel-parameters. Haven't
 * 			       tested it though, as the kernel support is currently 
 * 			       broken (2.3.99p4p3).
 * 			     - Updated tlan.txt accordingly.
 * 			     - Adjusted minimum/maximum frame length.
 * 			     - There is now a TLAN website up at 
 * 			       http://tlan.kernel.dk
 *
 * 	v1.7 April 07, 2000  - Started to implement custom ioctls. Driver now
 * 			       reports PHY information when used with Donald
 * 			       Beckers userspace MII diagnostics utility.
 *
 * 	v1.8 April 23, 2000  - Fixed support for forced speed/duplex settings.
 * 			     - Added link information to Auto-Neg and forced
 * 			       modes. When NIC operates with auto-neg the driver
 * 			       will report Link speed & duplex modes as well as
 * 			       link partner abilities. When forced link is used,
 * 			       the driver will report status of the established
 * 			       link.
 * 			       Please read tlan.txt for additional information. 
 * 			     - Removed call to check_region(), and used 
 * 			       return value of request_region() instead.
 *	
 *	v1.8a May 28, 2000   - Minor updates.
 *
 *	v1.9 July 25, 2000   - Fixed a few remaining Full-Duplex issues.
 *	                     - Updated with timer fixes from Andrew Morton.
 *	                     - Fixed module race in TLan_Open.
 *	                     - Added routine to monitor PHY status.
 *	                     - Added activity led support for Proliant devices.
 *
 *	v1.10 Aug 30, 2000   - Added support for EISA based tlan controllers 
 *			       like the Compaq NetFlex3/E. 
 *			     - Rewrote tlan_probe to better handle multiple
 *			       bus probes. Probing and device setup is now
 *			       done through TLan_Probe and TLan_init_one. Actual
 *			       hardware probe is done with kernel API and 
 *			       TLan_EisaProbe.
 *			     - Adjusted debug information for probing.
 *			     - Fixed bug that would cause general debug information 
 *			       to be printed after driver removal. 
 *			     - Added transmit timeout handling.
 *			     - Fixed OOM return values in tlan_probe. 
 *			     - Fixed possible mem leak in tlan_exit 
 *			       (now tlan_remove_one).
 *			     - Fixed timer bug in TLan_phyMonitor.
 *			     - This driver version is alpha quality, please
 *			       send me any bug issues you may encounter.
 *
 *	v1.11 Aug 31, 2000   - Do not try to register irq 0 if no irq line was 
 *			       set for EISA cards.
 *			     - Added support for NetFlex3/E with nibble-rate
 *			       10Base-T PHY. This is untestet as I haven't got
 *			       one of these cards.
 *			     - Fixed timer being added twice.
 *			     - Disabled PhyMonitoring by default as this is
 *			       work in progress. Define MONITOR to enable it.
 *			     - Now we don't display link info with PHYs that
 *			       doesn't support it (level1).
 *			     - Incresed tx_timeout beacuse of auto-neg.
 *			     - Adjusted timers for forced speeds.
 *
 *	v1.12 Oct 12, 2000   - Minor fixes (memleak, init, etc.)
 *
 * 	v1.13 Nov 28, 2000   - Stop flooding console with auto-neg issues
 * 			       when link can't be established.
 *			     - Added the bbuf option as a kernel parameter.
 *			     - Fixed ioaddr probe bug.
 *			     - Fixed stupid deadlock with MII interrupts.
 *			     - Added support for speed/duplex selection with 
 *			       multiple nics.
 *			     - Added partly fix for TX Channel lockup with
 *			       TLAN v1.0 silicon. This needs to be investigated
 *			       further.
 *
 * 	v1.14 Dec 16, 2000   - Added support for servicing multiple frames per.
 * 			       interrupt. Thanks goes to
 * 			       Adam Keys <[e-mail]>
 * 			       Denis Beaudoin <[e-mail]>
 * 			       for providing the patch.
 * 			     - Fixed auto-neg output when using multiple
 * 			       adapters.
 * 			     - Converted to use new taskq interface.
 *
 * 	v1.14a Jan 6, 2001   - Minor adjustments (spinlocks, etc.)
 *
 *******************************************************************************/

                                                                                
#include <linux/module.h>

#include "tlan.h"

#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/mii.h>


typedef u32 (TLanIntVectorFunc)( struct net_device *, u16 );


/* For removing EISA devices */
static	struct net_device	*TLan_Eisa_Devices;

static	int		TLanDevicesInstalled;

/* Set speed, duplex and aui settings */
static  int aui[MAX_TLAN_BOARDS];
static  int duplex[MAX_TLAN_BOARDS];
static  int speed[MAX_TLAN_BOARDS];
static  int boards_found;

MODULE_AUTHOR("Maintainer: Torben Mathiasen <[e-mail]>");
MODULE_DESCRIPTION("Driver for TI ThunderLAN based ethernet PCI adapters");
MODULE_LICENSE("GPL");

MODULE_PARM(aui, "1-" __MODULE_STRING(MAX_TLAN_BOARDS) "i");
MODULE_PARM(duplex, "1-" __MODULE_STRING(MAX_TLAN_BOARDS) "i");
MODULE_PARM(speed, "1-" __MODULE_STRING(MAX_TLAN_BOARDS) "i");
MODULE_PARM(debug, "i");
MODULE_PARM(bbuf, "i");
MODULE_PARM_DESC(aui, "ThunderLAN use AUI port(s) (0-1)");
MODULE_PARM_DESC(duplex, "ThunderLAN duplex setting(s) (0-default, 1-half, 2-full)");
MODULE_PARM_DESC(speed, "ThunderLAN port speen setting(s) (0,10,100)");
MODULE_PARM_DESC(debug, "ThunderLAN debug mask");
MODULE_PARM_DESC(bbuf, "ThunderLAN use big buffer (0-1)");
EXPORT_NO_SYMBOLS;

/* Define this to enable Link beat monitoring */
#undef MONITOR

/* Turn on debugging. See linux/Documentation/networking/tlan.txt for details */
static  int		debug;

static	int		bbuf;
static	u8		*TLanPadBuffer;
static	char		TLanSignature[] = "TLAN";
static const char tlan_banner[] = "ThunderLAN driver v1.14a\n";
static int tlan_have_pci;
static int tlan_have_eisa;

const char *media[] = {
	"10BaseT-HD ", "10BaseT-FD ","100baseTx-HD ", 
	"100baseTx-FD", "100baseT4", 0
};

int media_map[] = { 0x0020, 0x0040, 0x0080, 0x0100, 0x0200,};

static struct board {
	const char	*deviceLabel;
	u32	   	flags;
	u16	   	addrOfs;
} board_info[] __devinitdata = {
	{ "Compaq Netelligent 10 T PCI UTP", TLAN_ADAPTER_ACTIVITY_LED, 0x83 },
	{ "Compaq Netelligent 10/100 TX PCI UTP", TLAN_ADAPTER_ACTIVITY_LED, 0x83 },
	{ "Compaq Integrated NetFlex-3/P", TLAN_ADAPTER_NONE, 0x83 },
	{ "Compaq NetFlex-3/P", TLAN_ADAPTER_UNMANAGED_PHY | TLAN_ADAPTER_BIT_RATE_PHY, 0x83 },
	{ "Compaq NetFlex-3/P", TLAN_ADAPTER_NONE, 0x83 },
	{ "Compaq Netelligent Integrated 10/100 TX UTP", TLAN_ADAPTER_ACTIVITY_LED, 0x83 },
	{ "Compaq Netelligent Dual 10/100 TX PCI UTP", TLAN_ADAPTER_NONE, 0x83 },
	{ "Compaq Netelligent 10/100 TX Embedded UTP", TLAN_ADAPTER_NONE, 0x83 },
	{ "Olicom OC-2183/2185", TLAN_ADAPTER_USE_INTERN_10, 0x83 },
	{ "Olicom OC-2325", TLAN_ADAPTER_UNMANAGED_PHY, 0xF8 },
	{ "Olicom OC-2326", TLAN_ADAPTER_USE_INTERN_10, 0xF8 },
	{ "Compaq Netelligent 10/100 TX UTP", TLAN_ADAPTER_ACTIVITY_LED, 0x83 },
	{ "Compaq Netelligent 10 T/2 PCI UTP/Coax", TLAN_ADAPTER_NONE, 0x83 },
	{ "Compaq NetFlex-3/E", TLAN_ADAPTER_ACTIVITY_LED | 	/* EISA card */
	                        TLAN_ADAPTER_UNMANAGED_PHY | TLAN_ADAPTER_BIT_RATE_PHY, 0x83 },	
	{ "Compaq NetFlex-3/E", TLAN_ADAPTER_ACTIVITY_LED, 0x83 }, /* EISA card */
};

static struct pci_device_id tlan_pci_tbl[] __devinitdata = {
	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETEL10,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETEL100,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 },
	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETFLEX3I,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2 },
	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_THUNDER,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3 },
	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETFLEX3B,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETEL100PI,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5 },
	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETEL100D,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 6 },
	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETEL100I,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 7 },
	{ PCI_VENDOR_ID_OLICOM, PCI_DEVICE_ID_OLICOM_OC2183,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 8 },
	{ PCI_VENDOR_ID_OLICOM, PCI_DEVICE_ID_OLICOM_OC2325,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 9 },
	{ PCI_VENDOR_ID_OLICOM, PCI_DEVICE_ID_OLICOM_OC2326,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 10 },
	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_NETELLIGENT_10_100_WS_5100,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 11 },
	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_NETELLIGENT_10_T2,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 12 },
	{ 0,}
};
MODULE_DEVICE_TABLE(pci, tlan_pci_tbl);		

static void	TLan_EisaProbe( void );
static void	TLan_Eisa_Cleanup( void );
static int      TLan_Init( struct net_device * );
static int	TLan_Open( struct net_device *dev );
static int	TLan_StartTx( struct sk_buff *, struct net_device *);
static void	TLan_HandleInterrupt( int, void *, struct pt_regs *);
static int	TLan_Close( struct net_device *);
static struct	net_device_stats *TLan_GetStats( struct net_device *);
static void	TLan_SetMulticastList( struct net_device *);
static int	TLan_ioctl( struct net_device *dev, struct ifreq *rq, int cmd);
static int      TLan_probe1( struct pci_dev *pdev, long ioaddr, int irq, int rev, const struct pci_device_id *ent);
static void	TLan_tx_timeout( struct net_device *dev);
static int 	tlan_init_one( struct pci_dev *pdev, const struct pci_device_id *ent);

static u32	TLan_HandleInvalid( struct net_device *, u16 );
static u32	TLan_HandleTxEOF( struct net_device *, u16 );
static u32	TLan_HandleStatOverflow( struct net_device *, u16 );
static u32	TLan_HandleRxEOF( struct net_device *, u16 );
static u32	TLan_HandleDummy( struct net_device *, u16 );
static u32	TLan_HandleTxEOC( struct net_device *, u16 );
static u32	TLan_HandleStatusCheck( struct net_device *, u16 );
static u32	TLan_HandleRxEOC( struct net_device *, u16 );

static void	TLan_Timer( unsigned long );

static void	TLan_ResetLists( struct net_device * );
static void	TLan_FreeLists( struct net_device * );
static void	TLan_PrintDio( u16 );
static void	TLan_PrintList( TLanList *, char *, int );
static void	TLan_ReadAndClearStats( struct net_device *, int );
static void	TLan_ResetAdapter( struct net_device * );
static void	TLan_FinishReset( struct net_device * );
static void	TLan_SetMac( struct net_device *, int areg, char *mac );

static void	TLan_PhyPrint( struct net_device * );
static void	TLan_PhyDetect( struct net_device * );
static void	TLan_PhyPowerDown( struct net_device * );
static void	TLan_PhyPowerUp( struct net_device * );
static void	TLan_PhyReset( struct net_device * );
static void	TLan_PhyStartLink( struct net_device * );
static void	TLan_PhyFinishAutoNeg( struct net_device * );
#ifdef MONITOR
static void     TLan_PhyMonitor( struct net_device * );
#endif

/*
static int	TLan_PhyNop( struct net_device * );
static int	TLan_PhyInternalCheck( struct net_device * );
static int	TLan_PhyInternalService( struct net_device * );
static int	TLan_PhyDp83840aCheck( struct net_device * );
*/

static int	TLan_MiiReadReg( struct net_device *, u16, u16, u16 * );
static void	TLan_MiiSendData( u16, u32, unsigned );
static void	TLan_MiiSync( u16 );
static void	TLan_MiiWriteReg( struct net_device *, u16, u16, u16 );

static void	TLan_EeSendStart( u16 );
static int	TLan_EeSendByte( u16, u8, int );
static void	TLan_EeReceiveByte( u16, u8 *, int );
static int	TLan_EeReadByte( struct net_device *, u8, u8 * );


static TLanIntVectorFunc *TLanIntVector[TLAN_INT_NUMBER_OF_INTS] = {
	TLan_HandleInvalid,
	TLan_HandleTxEOF,
	TLan_HandleStatOverflow,
	TLan_HandleRxEOF,
	TLan_HandleDummy,
	TLan_HandleTxEOC,
	TLan_HandleStatusCheck,
	TLan_HandleRxEOC
};

static inline void
TLan_SetTimer( struct net_device *dev, u32 ticks, u32 type )
{
	TLanPrivateInfo *priv = dev->priv;
	unsigned long flags = 0;
	
	if (!in_irq())
		spin_lock_irqsave(&priv->lock, flags);
	if ( priv->timer.function != NULL &&
		priv->timerType != TLAN_TIMER_ACTIVITY ) { 
		if (!in_irq())
			spin_unlock_irqrestore(&priv->lock, flags);
		return;
	}
	priv->timer.function = &TLan_Timer;
	if (!in_irq())
		spin_unlock_irqrestore(&priv->lock, flags);

	priv->timer.data = (unsigned long) dev;
	priv->timerSetAt = jiffies;
	priv->timerType = type;
	mod_timer(&priv->timer, jiffies + ticks);
	
} /* TLan_SetTimer */


/*****************************************************************************
******************************************************************************

	ThunderLAN Driver Primary Functions

	These functions are more or less common to all Linux network drivers.

******************************************************************************
*****************************************************************************/





	/***************************************************************
	 *	tlan_remove_one
	 *
	 *	Returns:
	 *		Nothing
	 *	Parms:
	 *		None
	 *
	 *	Goes through the TLanDevices list and frees the device
	 *	structs and memory associated with each device (lists
	 *	and buffers).  It also ureserves the IO port regions
	 *	associated with this device.
	 *
	 **************************************************************/


static void __devexit tlan_remove_one( struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata( pdev );
	TLanPrivateInfo	*priv = dev->priv;
	
	unregister_netdev( dev );

	if ( priv->dmaStorage ) {
		kfree( priv->dmaStorage );
	}

	release_region( dev->base_addr, 0x10 );
	
	kfree( dev );
		
	pci_set_drvdata( pdev, NULL );
} 

static struct pci_driver tlan_driver = {
	name:		"tlan",
	id_table:	tlan_pci_tbl,
	probe:		tlan_init_one,
	remove:		__devexit_p(tlan_remove_one),	
};

static int __init tlan_probe(void)
{
	static int	pad_allocated;
	
	printk(KERN_INFO "%s", tlan_banner);
	
	TLanPadBuffer = (u8 *) kmalloc(TLAN_MIN_FRAME_SIZE, 
					GFP_KERNEL);

	if (TLanPadBuffer == NULL) {
		printk(KERN_ERR "TLAN: Could not allocate memory for pad buffer.\n");
		return -ENOMEM;
	}