de4x5.c

linux-2.6.15.6

                          Updated debug flags.
			  Fix sleep/wakeup calls for PCI cards, bug reported
			   by <[e-mail]>.
			  Added multi-MAC, one SROM feature from discussion
			   with <[e-mail]>.
			  Added full module autoprobe capability.
			  Added attempt to use an SMC9332 with broken SROM.
			  Added fix for ZYNX multi-mac cards that didn't
			   get their IRQs wired correctly.
      0.51   13-Feb-97    Added endian fixes for the SROM accesses from
			   <[e-mail]>
			  Fix init_connection() to remove extra device reset.
			  Fix MAC/PHY reset ordering in dc21140m_autoconf().
			  Fix initialisation problem with lp->timeout in
			   typeX_infoblock() from <[e-mail]>.
			  Fix MII PHY reset problem from work done by
			   <[e-mail]>.
      0.52   26-Apr-97    Some changes may not credit the right people -
                           a disk crash meant I lost some mail.
			  Change RX interrupt routine to drop rather than 
			   defer packets to avoid hang reported by 
			   <[e-mail]>.
			  Fix srom_exec() to return for COMPACT and type 1
			   infoblocks.
			  Added DC21142 and DC21143 functions.
			  Added byte counters from <[e-mail]>
			  Added SA_INTERRUPT temporary fix from 
			   <[e-mail]>.
      0.53   12-Nov-97    Fix the *_probe() to include 'eth??' name during
                           module load: bug reported by
			   <[e-mail]>
			  Fix multi-MAC, one SROM, to work with 2114x chips:
			   bug reported by <[e-mail]>.
			  Make above search independent of BIOS device scan
			   direction.
			  Completed DC2114[23] autosense functions.
      0.531  21-Dec-97    Fix DE500-XA 100Mb/s bug reported by 
                           <[e-mail]
			  Fix type1_infoblock() bug introduced in 0.53, from
			   problem reports by 
			   <[e-mail]> and
			   <[e-mail]>.
			  Added argument list to set up each board from either
			   a module's command line or a compiled in #define.
			  Added generic MII PHY functionality to deal with
			   newer PHY chips.
			  Fix the mess in 2.1.67.
      0.532   5-Jan-98    Fix bug in mii_get_phy() reported by 
                           <[e-mail]>.
                          Fix bug in pci_probe() for 64 bit systems reported
			   by <[e-mail]>.
      0.533   9-Jan-98    Fix more 64 bit bugs reported by <[e-mail]>.
      0.534  24-Jan-98    Fix last (?) endian bug from <[e-mail]>
      0.535  21-Feb-98    Fix Ethernet Address PROM reset bug for DC21040.
      0.536  21-Mar-98    Change pci_probe() to use the pci_dev structure.
			  **Incompatible with 2.0.x from here.**
      0.540   5-Jul-98    Atomicize assertion of dev->interrupt for SMP
                           from <[e-mail]>
			  Add TP, AUI and BNC cases to 21140m_autoconf() for
			   case where a 21140 under SROM control uses, e.g. AUI
			   from problem report by <[e-mail]>
			  Add MII parallel detection to 2114x_autoconf() for
			   case where no autonegotiation partner exists from
			   problem report by <[e-mail]>.
			  Add ability to force connection type directly even
			   when using SROM control from problem report by
			   <[e-mail]>.
			  Updated the PCI interface to conform with the latest
			   version. I hope nothing is broken...
          		  Add TX done interrupt modification from suggestion
			   by <[e-mail]>.
			  Fix is_anc_capable() bug reported by 
			   <[e-mail]>.
			  Fix type[13]_infoblock() bug: during MII search, PHY
			   lp->rst not run because lp->ibn not initialised -
			   from report & fix by <[e-mail]>.
			  Fix probe bug with EISA & PCI cards present from
                           report by <[e-mail]>.
      0.541  24-Aug-98    Fix compiler problems associated with i386-string
                           ops from multiple bug reports and temporary fix
			   from <[e-mail]>.
			  Fix pci_probe() to correctly emulate the old
			   pcibios_find_class() function.
			  Add an_exception() for old ZYNX346 and fix compile
			   warning on PPC & SPARC, from <[e-mail]>.
			  Fix lastPCI to correctly work with compiled in
			   kernels and modules from bug report by 
			   <[e-mail]> et al.
      0.542  15-Sep-98    Fix dc2114x_autoconf() to stop multiple messages
                           when media is unconnected.
			  Change dev->interrupt to lp->interrupt to ensure
			   alignment for Alpha's and avoid their unaligned
			   access traps. This flag is merely for log messages:
			   should do something more definitive though...
      0.543  30-Dec-98    Add SMP spin locking.
      0.544   8-May-99    Fix for buggy SROM in Motorola embedded boards using
                           a 21143 by <[e-mail]>.
			  Change PCI/EISA bus probing order.
      0.545  28-Nov-99    Further Moto SROM bug fix from 
                           <[e-mail]>
                          Remove double checking for DEBUG_RX in de4x5_dbg_rx()
			   from report by <[e-mail]>
      0.546  22-Feb-01    Fixes Alpha XP1000 oops.  The srom_search function
                           was causing a page fault when initializing the
                           variable 'pb', on a non de4x5 PCI device, in this
                           case a PCI bridge (DEC chip 21152). The value of
                           'pb' is now only initialized if a de4x5 chip is
                           present. 
                           <[e-mail]>  
      0.547  08-Nov-01    Use library crc32 functions by <[e-mail]>
      0.548  30-Aug-03    Big 2.6 cleanup. Ported to PCI/EISA probing and
                           generic DMA APIs. Fixed DE425 support on Alpha.
			   <[e-mail]>
    =========================================================================
*/

#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/eisa.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/crc32.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/time.h>
#include <linux/types.h>
#include <linux/unistd.h>
#include <linux/ctype.h>
#include <linux/dma-mapping.h>
#include <linux/moduleparam.h>
#include <linux/bitops.h>

#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
#include <asm/uaccess.h>
#ifdef CONFIG_PPC_MULTIPLATFORM
#include <asm/machdep.h>
#endif /* CONFIG_PPC_MULTIPLATFORM */

#include "de4x5.h"

static char version[] __devinitdata = "de4x5.c:V0.546 2001/02/22 [e-mail]\n";

#define c_char const char
#define TWIDDLE(a) (u_short)le16_to_cpu(get_unaligned((u_short *)(a)))

/*
** MII Information
*/
struct phy_table {
    int reset;              /* Hard reset required?                         */
    int id;                 /* IEEE OUI                                     */
    int ta;                 /* One cycle TA time - 802.3u is confusing here */
    struct {                /* Non autonegotiation (parallel) speed det.    */
	int reg;
	int mask;
	int value;
    } spd;
};

struct mii_phy {
    int reset;              /* Hard reset required?                      */
    int id;                 /* IEEE OUI                                  */
    int ta;                 /* One cycle TA time                         */
    struct {                /* Non autonegotiation (parallel) speed det. */
	int reg;
	int mask;
	int value;
    } spd;
    int addr;               /* MII address for the PHY                   */
    u_char  *gep;           /* Start of GEP sequence block in SROM       */
    u_char  *rst;           /* Start of reset sequence in SROM           */
    u_int mc;               /* Media Capabilities                        */
    u_int ana;              /* NWay Advertisement                        */
    u_int fdx;              /* Full DupleX capabilites for each media    */
    u_int ttm;              /* Transmit Threshold Mode for each media    */
    u_int mci;              /* 21142 MII Connector Interrupt info        */
};

#define DE4X5_MAX_PHY 8     /* Allow upto 8 attached PHY devices per board */

struct sia_phy {
    u_char mc;              /* Media Code                                */
    u_char ext;             /* csr13-15 valid when set                   */
    int csr13;              /* SIA Connectivity Register                 */
    int csr14;              /* SIA TX/RX Register                        */
    int csr15;              /* SIA General Register                      */
    int gepc;               /* SIA GEP Control Information               */
    int gep;                /* SIA GEP Data                              */
};

/*
** Define the know universe of PHY devices that can be
** recognised by this driver.
*/
static struct phy_table phy_info[] = {
    {0, NATIONAL_TX, 1, {0x19, 0x40, 0x00}},       /* National TX      */
    {1, BROADCOM_T4, 1, {0x10, 0x02, 0x02}},       /* Broadcom T4      */
    {0, SEEQ_T4    , 1, {0x12, 0x10, 0x10}},       /* SEEQ T4          */
    {0, CYPRESS_T4 , 1, {0x05, 0x20, 0x20}},       /* Cypress T4       */
    {0, 0x7810     , 1, {0x14, 0x0800, 0x0800}}    /* Level One LTX970 */
};

/*
** These GENERIC values assumes that the PHY devices follow 802.3u and
** allow parallel detection to set the link partner ability register.
** Detection of 100Base-TX [H/F Duplex] and 100Base-T4 is supported.
*/
#define GENERIC_REG   0x05      /* Autoneg. Link Partner Advertisement Reg. */
#define GENERIC_MASK  MII_ANLPA_100M /* All 100Mb/s Technologies            */
#define GENERIC_VALUE MII_ANLPA_100M /* 100B-TX, 100B-TX FDX, 100B-T4       */

/*
** Define special SROM detection cases
*/
static c_char enet_det[][ETH_ALEN] = {
    {0x00, 0x00, 0xc0, 0x00, 0x00, 0x00},
    {0x00, 0x00, 0xe8, 0x00, 0x00, 0x00}
};

#define SMC    1
#define ACCTON 2

/*
** SROM Repair definitions. If a broken SROM is detected a card may
** use this information to help figure out what to do. This is a
** "stab in the dark" and so far for SMC9332's only.
*/
static c_char srom_repair_info[][100] = {
    {0x00,0x1e,0x00,0x00,0x00,0x08,             /* SMC9332 */
     0x1f,0x01,0x8f,0x01,0x00,0x01,0x00,0x02,
     0x01,0x00,0x00,0x78,0xe0,0x01,0x00,0x50,
     0x00,0x18,}
};


#ifdef DE4X5_DEBUG
static int de4x5_debug = DE4X5_DEBUG;
#else
/*static int de4x5_debug = (DEBUG_MII | DEBUG_SROM | DEBUG_PCICFG | DEBUG_MEDIA | DEBUG_VERSION);*/
static int de4x5_debug = (DEBUG_MEDIA | DEBUG_VERSION);
#endif

/*
** Allow per adapter set up. For modules this is simply a command line
** parameter, e.g.: 
** insmod de4x5 args='eth1:fdx autosense=BNC eth0:autosense=100Mb'.
**
** For a compiled in driver, place e.g.
**     #define DE4X5_PARM "eth0:fdx autosense=AUI eth2:autosense=TP"
** here
*/
#ifdef DE4X5_PARM
static char *args = DE4X5_PARM;
#else
static char *args;
#endif

struct parameters {
    int fdx;
    int autosense;
};

#define DE4X5_AUTOSENSE_MS 250      /* msec autosense tick (DE500) */

#define DE4X5_NDA 0xffe0            /* No Device (I/O) Address */

/*
** Ethernet PROM defines
*/
#define PROBE_LENGTH    32
#define ETH_PROM_SIG    0xAA5500FFUL

/*
** Ethernet Info
*/
#define PKT_BUF_SZ	1536            /* Buffer size for each Tx/Rx buffer */
#define IEEE802_3_SZ    1518            /* Packet + CRC */
#define MAX_PKT_SZ   	1514            /* Maximum ethernet packet length */
#define MAX_DAT_SZ   	1500            /* Maximum ethernet data length */
#define MIN_DAT_SZ   	1               /* Minimum ethernet data length */
#define PKT_HDR_LEN     14              /* Addresses and data length info */
#define FAKE_FRAME_LEN  (MAX_PKT_SZ + 1)
#define QUEUE_PKT_TIMEOUT (3*HZ)        /* 3 second timeout */


/*
** EISA bus defines
*/
#define DE4X5_EISA_IO_PORTS   0x0c00    /* I/O port base address, slot 0 */
#define DE4X5_EISA_TOTAL_SIZE 0x100     /* I/O address extent */

#define EISA_ALLOWED_IRQ_LIST  {5, 9, 10, 11}

#define DE4X5_SIGNATURE {"DE425","DE434","DE435","DE450","DE500"}
#define DE4X5_NAME_LENGTH 8

static c_char *de4x5_signatures[] = DE4X5_SIGNATURE;

/*
** Ethernet PROM defines for DC21040
*/
#define PROBE_LENGTH    32
#define ETH_PROM_SIG    0xAA5500FFUL

/*
** PCI Bus defines
*/
#define PCI_MAX_BUS_NUM      8
#define DE4X5_PCI_TOTAL_SIZE 0x80       /* I/O address extent */
#define DE4X5_CLASS_CODE     0x00020000 /* Network controller, Ethernet */

/*
** Memory Alignment. Each descriptor is 4 longwords long. To force a
** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
** DESC_ALIGN. ALIGN aligns the start address of the private memory area
** and hence the RX descriptor ring's first entry.