git.oblomov.eu Git - linux-2.6/blob - drivers/net/tc35815.c

   1 /*
   2  * tc35815.c: A TOSHIBA TC35815CF PCI 10/100Mbps ethernet driver for linux.
   3  *
   4  * Based on skelton.c by Donald Becker.
   5  *
   6  * This driver is a replacement of older and less maintained version.
   7  * This is a header of the older version:
   8  *      -----<snip>-----
   9  *      Copyright 2001 MontaVista Software Inc.
  10  *      Author: MontaVista Software, Inc.
  11  *              ahennessy@mvista.com
  12  *      Copyright (C) 2000-2001 Toshiba Corporation
  13  *      static const char *version =
  14  *              "tc35815.c:v0.00 26/07/2000 by Toshiba Corporation\n";
  15  *      -----<snip>-----
  16  *
  17  * This file is subject to the terms and conditions of the GNU General Public
  18  * License.  See the file "COPYING" in the main directory of this archive
  19  * for more details.
  20  *
  21  * (C) Copyright TOSHIBA CORPORATION 2004-2005
  22  * All Rights Reserved.
  23  */
  24
  25 #ifdef TC35815_NAPI
  26 #define DRV_VERSION     "1.36-NAPI"
  27 #else
  28 #define DRV_VERSION     "1.36"
  29 #endif
  30 static const char *version = "tc35815.c:v" DRV_VERSION "\n";
  31 #define MODNAME                 "tc35815"
  32
  33 #include <linux/module.h>
  34 #include <linux/kernel.h>
  35 #include <linux/types.h>
  36 #include <linux/fcntl.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/ioport.h>
  39 #include <linux/in.h>
  40 #include <linux/slab.h>
  41 #include <linux/string.h>
  42 #include <linux/spinlock.h>
  43 #include <linux/errno.h>
  44 #include <linux/init.h>
  45 #include <linux/netdevice.h>
  46 #include <linux/etherdevice.h>
  47 #include <linux/skbuff.h>
  48 #include <linux/delay.h>
  49 #include <linux/pci.h>
  50 #include <linux/mii.h>
  51 #include <linux/ethtool.h>
  52 #include <linux/platform_device.h>
  53 #include <asm/io.h>
  54 #include <asm/byteorder.h>
  55
  56 /* First, a few definitions that the brave might change. */
  57
  58 #define GATHER_TXINT    /* On-Demand Tx Interrupt */
  59 #define WORKAROUND_LOSTCAR
  60 #define WORKAROUND_100HALF_PROMISC
  61 /* #define TC35815_USE_PACKEDBUFFER */
  62
  63 typedef enum {
  64         TC35815CF = 0,
  65         TC35815_NWU,
  66         TC35815_TX4939,
  67 } board_t;
  68
  69 /* indexed by board_t, above */
  70 static const struct {
  71         const char *name;
  72 } board_info[] __devinitdata = {
  73         { "TOSHIBA TC35815CF 10/100BaseTX" },
  74         { "TOSHIBA TC35815 with Wake on LAN" },
  75         { "TOSHIBA TC35815/TX4939" },
  76 };
  77
  78 static const struct pci_device_id tc35815_pci_tbl[] = {
  79         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815CF), .driver_data = TC35815CF },
  80         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_NWU), .driver_data = TC35815_NWU },
  81         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939), .driver_data = TC35815_TX4939 },
  82         {0,}
  83 };
  84 MODULE_DEVICE_TABLE (pci, tc35815_pci_tbl);
  85
  86 /* see MODULE_PARM_DESC */
  87 static struct tc35815_options {
  88         int speed;
  89         int duplex;
  90         int doforce;
  91 } options;
  92
  93 /*
  94  * Registers
  95  */
  96 struct tc35815_regs {
  97         volatile __u32 DMA_Ctl;         /* 0x00 */
  98         volatile __u32 TxFrmPtr;
  99         volatile __u32 TxThrsh;
 100         volatile __u32 TxPollCtr;
 101         volatile __u32 BLFrmPtr;
 102         volatile __u32 RxFragSize;
 103         volatile __u32 Int_En;
 104         volatile __u32 FDA_Bas;
 105         volatile __u32 FDA_Lim;         /* 0x20 */
 106         volatile __u32 Int_Src;
 107         volatile __u32 unused0[2];
 108         volatile __u32 PauseCnt;
 109         volatile __u32 RemPauCnt;
 110         volatile __u32 TxCtlFrmStat;
 111         volatile __u32 unused1;
 112         volatile __u32 MAC_Ctl;         /* 0x40 */
 113         volatile __u32 CAM_Ctl;
 114         volatile __u32 Tx_Ctl;
 115         volatile __u32 Tx_Stat;
 116         volatile __u32 Rx_Ctl;
 117         volatile __u32 Rx_Stat;
 118         volatile __u32 MD_Data;
 119         volatile __u32 MD_CA;
 120         volatile __u32 CAM_Adr;         /* 0x60 */
 121         volatile __u32 CAM_Data;
 122         volatile __u32 CAM_Ena;
 123         volatile __u32 PROM_Ctl;
 124         volatile __u32 PROM_Data;
 125         volatile __u32 Algn_Cnt;
 126         volatile __u32 CRC_Cnt;
 127         volatile __u32 Miss_Cnt;
 128 };
 129
 130 /*
 131  * Bit assignments
 132  */
 133 /* DMA_Ctl bit asign ------------------------------------------------------- */
 134 #define DMA_RxAlign            0x00c00000 /* 1:Reception Alignment           */
 135 #define DMA_RxAlign_1          0x00400000
 136 #define DMA_RxAlign_2          0x00800000
 137 #define DMA_RxAlign_3          0x00c00000
 138 #define DMA_M66EnStat          0x00080000 /* 1:66MHz Enable State            */
 139 #define DMA_IntMask            0x00040000 /* 1:Interupt mask                 */
 140 #define DMA_SWIntReq           0x00020000 /* 1:Software Interrupt request    */
 141 #define DMA_TxWakeUp           0x00010000 /* 1:Transmit Wake Up              */
 142 #define DMA_RxBigE             0x00008000 /* 1:Receive Big Endian            */
 143 #define DMA_TxBigE             0x00004000 /* 1:Transmit Big Endian           */
 144 #define DMA_TestMode           0x00002000 /* 1:Test Mode                     */
 145 #define DMA_PowrMgmnt          0x00001000 /* 1:Power Management              */
 146 #define DMA_DmBurst_Mask       0x000001fc /* DMA Burst size                  */
 147
 148 /* RxFragSize bit asign ---------------------------------------------------- */
 149 #define RxFrag_EnPack          0x00008000 /* 1:Enable Packing                */
 150 #define RxFrag_MinFragMask     0x00000ffc /* Minimum Fragment                */
 151
 152 /* MAC_Ctl bit asign ------------------------------------------------------- */
 153 #define MAC_Link10             0x00008000 /* 1:Link Status 10Mbits           */
 154 #define MAC_EnMissRoll         0x00002000 /* 1:Enable Missed Roll            */
 155 #define MAC_MissRoll           0x00000400 /* 1:Missed Roll                   */
 156 #define MAC_Loop10             0x00000080 /* 1:Loop 10 Mbps                  */
 157 #define MAC_Conn_Auto          0x00000000 /*00:Connection mode (Automatic)   */
 158 #define MAC_Conn_10M           0x00000020 /*01:                (10Mbps endec)*/
 159 #define MAC_Conn_Mll           0x00000040 /*10:                (Mll clock)   */
 160 #define MAC_MacLoop            0x00000010 /* 1:MAC Loopback                  */
 161 #define MAC_FullDup            0x00000008 /* 1:Full Duplex 0:Half Duplex     */
 162 #define MAC_Reset              0x00000004 /* 1:Software Reset                */
 163 #define MAC_HaltImm            0x00000002 /* 1:Halt Immediate                */
 164 #define MAC_HaltReq            0x00000001 /* 1:Halt request                  */
 165
 166 /* PROM_Ctl bit asign ------------------------------------------------------ */
 167 #define PROM_Busy              0x00008000 /* 1:Busy (Start Operation)        */
 168 #define PROM_Read              0x00004000 /*10:Read operation                */
 169 #define PROM_Write             0x00002000 /*01:Write operation               */
 170 #define PROM_Erase             0x00006000 /*11:Erase operation               */
 171                                           /*00:Enable or Disable Writting,   */
 172                                           /*      as specified in PROM_Addr. */
 173 #define PROM_Addr_Ena          0x00000030 /*11xxxx:PROM Write enable         */
 174                                           /*00xxxx:           disable        */
 175
 176 /* CAM_Ctl bit asign ------------------------------------------------------- */
 177 #define CAM_CompEn             0x00000010 /* 1:CAM Compare Enable            */
 178 #define CAM_NegCAM             0x00000008 /* 1:Reject packets CAM recognizes,*/
 179                                           /*                    accept other */
 180 #define CAM_BroadAcc           0x00000004 /* 1:Broadcast assept              */
 181 #define CAM_GroupAcc           0x00000002 /* 1:Multicast assept              */
 182 #define CAM_StationAcc         0x00000001 /* 1:unicast accept                */
 183
 184 /* CAM_Ena bit asign ------------------------------------------------------- */
 185 #define CAM_ENTRY_MAX                  21   /* CAM Data entry max count      */
 186 #define CAM_Ena_Mask ((1<<CAM_ENTRY_MAX)-1) /* CAM Enable bits (Max 21bits)  */
 187 #define CAM_Ena_Bit(index)         (1<<(index))
 188 #define CAM_ENTRY_DESTINATION   0
 189 #define CAM_ENTRY_SOURCE        1
 190 #define CAM_ENTRY_MACCTL        20
 191
 192 /* Tx_Ctl bit asign -------------------------------------------------------- */
 193 #define Tx_En                  0x00000001 /* 1:Transmit enable               */
 194 #define Tx_TxHalt              0x00000002 /* 1:Transmit Halt Request         */
 195 #define Tx_NoPad               0x00000004 /* 1:Suppress Padding              */
 196 #define Tx_NoCRC               0x00000008 /* 1:Suppress Padding              */
 197 #define Tx_FBack               0x00000010 /* 1:Fast Back-off                 */
 198 #define Tx_EnUnder             0x00000100 /* 1:Enable Underrun               */
 199 #define Tx_EnExDefer           0x00000200 /* 1:Enable Excessive Deferral     */
 200 #define Tx_EnLCarr             0x00000400 /* 1:Enable Lost Carrier           */
 201 #define Tx_EnExColl            0x00000800 /* 1:Enable Excessive Collision    */
 202 #define Tx_EnLateColl          0x00001000 /* 1:Enable Late Collision         */
 203 #define Tx_EnTxPar             0x00002000 /* 1:Enable Transmit Parity        */
 204 #define Tx_EnComp              0x00004000 /* 1:Enable Completion             */
 205
 206 /* Tx_Stat bit asign ------------------------------------------------------- */
 207 #define Tx_TxColl_MASK         0x0000000F /* Tx Collision Count              */
 208 #define Tx_ExColl              0x00000010 /* Excessive Collision             */
 209 #define Tx_TXDefer             0x00000020 /* Transmit Defered                */
 210 #define Tx_Paused              0x00000040 /* Transmit Paused                 */
 211 #define Tx_IntTx               0x00000080 /* Interrupt on Tx                 */
 212 #define Tx_Under               0x00000100 /* Underrun                        */
 213 #define Tx_Defer               0x00000200 /* Deferral                        */
 214 #define Tx_NCarr               0x00000400 /* No Carrier                      */
 215 #define Tx_10Stat              0x00000800 /* 10Mbps Status                   */
 216 #define Tx_LateColl            0x00001000 /* Late Collision                  */
 217 #define Tx_TxPar               0x00002000 /* Tx Parity Error                 */
 218 #define Tx_Comp                0x00004000 /* Completion                      */
 219 #define Tx_Halted              0x00008000 /* Tx Halted                       */
 220 #define Tx_SQErr               0x00010000 /* Signal Quality Error(SQE)       */
 221
 222 /* Rx_Ctl bit asign -------------------------------------------------------- */
 223 #define Rx_EnGood              0x00004000 /* 1:Enable Good                   */
 224 #define Rx_EnRxPar             0x00002000 /* 1:Enable Receive Parity         */
 225 #define Rx_EnLongErr           0x00000800 /* 1:Enable Long Error             */
 226 #define Rx_EnOver              0x00000400 /* 1:Enable OverFlow               */
 227 #define Rx_EnCRCErr            0x00000200 /* 1:Enable CRC Error              */
 228 #define Rx_EnAlign             0x00000100 /* 1:Enable Alignment              */
 229 #define Rx_IgnoreCRC           0x00000040 /* 1:Ignore CRC Value              */
 230 #define Rx_StripCRC            0x00000010 /* 1:Strip CRC Value               */
 231 #define Rx_ShortEn             0x00000008 /* 1:Short Enable                  */
 232 #define Rx_LongEn              0x00000004 /* 1:Long Enable                   */
 233 #define Rx_RxHalt              0x00000002 /* 1:Receive Halt Request          */
 234 #define Rx_RxEn                0x00000001 /* 1:Receive Intrrupt Enable       */
 235
 236 /* Rx_Stat bit asign ------------------------------------------------------- */
 237 #define Rx_Halted              0x00008000 /* Rx Halted                       */
 238 #define Rx_Good                0x00004000 /* Rx Good                         */
 239 #define Rx_RxPar               0x00002000 /* Rx Parity Error                 */
 240                             /* 0x00001000    not use                         */
 241 #define Rx_LongErr             0x00000800 /* Rx Long Error                   */
 242 #define Rx_Over                0x00000400 /* Rx Overflow                     */
 243 #define Rx_CRCErr              0x00000200 /* Rx CRC Error                    */
 244 #define Rx_Align               0x00000100 /* Rx Alignment Error              */
 245 #define Rx_10Stat              0x00000080 /* Rx 10Mbps Status                */
 246 #define Rx_IntRx               0x00000040 /* Rx Interrupt                    */
 247 #define Rx_CtlRecd             0x00000020 /* Rx Control Receive              */
 248
 249 #define Rx_Stat_Mask           0x0000EFC0 /* Rx All Status Mask              */
 250
 251 /* Int_En bit asign -------------------------------------------------------- */
 252 #define Int_NRAbtEn            0x00000800 /* 1:Non-recoverable Abort Enable  */
 253 #define Int_TxCtlCmpEn         0x00000400 /* 1:Transmit Control Complete Enable */
 254 #define Int_DmParErrEn         0x00000200 /* 1:DMA Parity Error Enable       */
 255 #define Int_DParDEn            0x00000100 /* 1:Data Parity Error Enable      */
 256 #define Int_EarNotEn           0x00000080 /* 1:Early Notify Enable           */
 257 #define Int_DParErrEn          0x00000040 /* 1:Detected Parity Error Enable  */
 258 #define Int_SSysErrEn          0x00000020 /* 1:Signalled System Error Enable */
 259 #define Int_RMasAbtEn          0x00000010 /* 1:Received Master Abort Enable  */
 260 #define Int_RTargAbtEn         0x00000008 /* 1:Received Target Abort Enable  */
 261 #define Int_STargAbtEn         0x00000004 /* 1:Signalled Target Abort Enable */
 262 #define Int_BLExEn             0x00000002 /* 1:Buffer List Exhausted Enable  */
 263 #define Int_FDAExEn            0x00000001 /* 1:Free Descriptor Area          */
 264                                           /*               Exhausted Enable  */
 265
 266 /* Int_Src bit asign ------------------------------------------------------- */
 267 #define Int_NRabt              0x00004000 /* 1:Non Recoverable error         */
 268 #define Int_DmParErrStat       0x00002000 /* 1:DMA Parity Error & Clear      */
 269 #define Int_BLEx               0x00001000 /* 1:Buffer List Empty & Clear     */
 270 #define Int_FDAEx              0x00000800 /* 1:FDA Empty & Clear             */
 271 #define Int_IntNRAbt           0x00000400 /* 1:Non Recoverable Abort         */
 272 #define Int_IntCmp             0x00000200 /* 1:MAC control packet complete   */
 273 #define Int_IntExBD            0x00000100 /* 1:Interrupt Extra BD & Clear    */
 274 #define Int_DmParErr           0x00000080 /* 1:DMA Parity Error & Clear      */
 275 #define Int_IntEarNot          0x00000040 /* 1:Receive Data write & Clear    */
 276 #define Int_SWInt              0x00000020 /* 1:Software request & Clear      */
 277 #define Int_IntBLEx            0x00000010 /* 1:Buffer List Empty & Clear     */
 278 #define Int_IntFDAEx           0x00000008 /* 1:FDA Empty & Clear             */
 279 #define Int_IntPCI             0x00000004 /* 1:PCI controller & Clear        */
 280 #define Int_IntMacRx           0x00000002 /* 1:Rx controller & Clear         */
 281 #define Int_IntMacTx           0x00000001 /* 1:Tx controller & Clear         */
 282
 283 /* MD_CA bit asign --------------------------------------------------------- */
 284 #define MD_CA_PreSup           0x00001000 /* 1:Preamble Supress              */
 285 #define MD_CA_Busy             0x00000800 /* 1:Busy (Start Operation)        */
 286 #define MD_CA_Wr               0x00000400 /* 1:Write 0:Read                  */
 287
 288
 289 /*
 290  * Descriptors
 291  */
 292
 293 /* Frame descripter */
 294 struct FDesc {
 295         volatile __u32 FDNext;
 296         volatile __u32 FDSystem;
 297         volatile __u32 FDStat;
 298         volatile __u32 FDCtl;
 299 };
 300
 301 /* Buffer descripter */
 302 struct BDesc {
 303         volatile __u32 BuffData;
 304         volatile __u32 BDCtl;
 305 };
 306
 307 #define FD_ALIGN        16
 308
 309 /* Frame Descripter bit asign ---------------------------------------------- */
 310 #define FD_FDLength_MASK       0x0000FFFF /* Length MASK                     */
 311 #define FD_BDCnt_MASK          0x001F0000 /* BD count MASK in FD             */
 312 #define FD_FrmOpt_MASK         0x7C000000 /* Frame option MASK               */
 313 #define FD_FrmOpt_BigEndian    0x40000000 /* Tx/Rx */
 314 #define FD_FrmOpt_IntTx        0x20000000 /* Tx only */
 315 #define FD_FrmOpt_NoCRC        0x10000000 /* Tx only */
 316 #define FD_FrmOpt_NoPadding    0x08000000 /* Tx only */
 317 #define FD_FrmOpt_Packing      0x04000000 /* Rx only */
 318 #define FD_CownsFD             0x80000000 /* FD Controller owner bit         */
 319 #define FD_Next_EOL            0x00000001 /* FD EOL indicator                */
 320 #define FD_BDCnt_SHIFT         16
 321
 322 /* Buffer Descripter bit asign --------------------------------------------- */
 323 #define BD_BuffLength_MASK     0x0000FFFF /* Recieve Data Size               */
 324 #define BD_RxBDID_MASK         0x00FF0000 /* BD ID Number MASK               */
 325 #define BD_RxBDSeqN_MASK       0x7F000000 /* Rx BD Sequence Number           */
 326 #define BD_CownsBD             0x80000000 /* BD Controller owner bit         */
 327 #define BD_RxBDID_SHIFT        16
 328 #define BD_RxBDSeqN_SHIFT      24
 329
 330
 331 /* Some useful constants. */
 332 #undef NO_CHECK_CARRIER /* Does not check No-Carrier with TP */
 333
 334 #ifdef NO_CHECK_CARRIER
 335 #define TX_CTL_CMD      (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
 336         Tx_EnExColl | Tx_EnExDefer | Tx_EnUnder | \
 337         Tx_En)  /* maybe  0x7b01 */
 338 #else
 339 #define TX_CTL_CMD      (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
 340         Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
 341         Tx_En)  /* maybe  0x7b01 */
 342 #endif
 343 #define RX_CTL_CMD      (Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
 344         | Rx_EnCRCErr | Rx_EnAlign | Rx_RxEn)   /* maybe 0x6f01 */
 345 #define INT_EN_CMD  (Int_NRAbtEn | \
 346         Int_DmParErrEn | Int_DParDEn | Int_DParErrEn | \
 347         Int_SSysErrEn  | Int_RMasAbtEn | Int_RTargAbtEn | \
 348         Int_STargAbtEn | \
 349         Int_BLExEn  | Int_FDAExEn) /* maybe 0xb7f*/
 350 #define DMA_CTL_CMD     DMA_BURST_SIZE
 351 #define HAVE_DMA_RXALIGN(lp)    likely((lp)->boardtype != TC35815CF)
 352
 353 /* Tuning parameters */
 354 #define DMA_BURST_SIZE  32
 355 #define TX_THRESHOLD    1024
 356 #define TX_THRESHOLD_MAX 1536       /* used threshold with packet max byte for low pci transfer ability.*/
 357 #define TX_THRESHOLD_KEEP_LIMIT 10  /* setting threshold max value when overrun error occured this count. */
 358
 359 /* 16 + RX_BUF_NUM * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*FD_PAGE_NUM */
 360 #ifdef TC35815_USE_PACKEDBUFFER
 361 #define FD_PAGE_NUM 2
 362 #define RX_BUF_NUM      8       /* >= 2 */
 363 #define RX_FD_NUM       250     /* >= 32 */
 364 #define TX_FD_NUM       128
 365 #define RX_BUF_SIZE     PAGE_SIZE
 366 #else /* TC35815_USE_PACKEDBUFFER */
 367 #define FD_PAGE_NUM 4
 368 #define RX_BUF_NUM      128     /* < 256 */
 369 #define RX_FD_NUM       256     /* >= 32 */
 370 #define TX_FD_NUM       128
 371 #if RX_CTL_CMD & Rx_LongEn
 372 #define RX_BUF_SIZE     PAGE_SIZE
 373 #elif RX_CTL_CMD & Rx_StripCRC
 374 #define RX_BUF_SIZE     ALIGN(ETH_FRAME_LEN + 4 + 2, 32) /* +2: reserve */
 375 #else
 376 #define RX_BUF_SIZE     ALIGN(ETH_FRAME_LEN + 2, 32) /* +2: reserve */
 377 #endif
 378 #endif /* TC35815_USE_PACKEDBUFFER */
 379 #define RX_FD_RESERVE   (2 / 2) /* max 2 BD per RxFD */
 380 #define NAPI_WEIGHT     16
 381
 382 struct TxFD {
 383         struct FDesc fd;
 384         struct BDesc bd;
 385         struct BDesc unused;
 386 };
 387
 388 struct RxFD {
 389         struct FDesc fd;
 390         struct BDesc bd[0];     /* variable length */
 391 };
 392
 393 struct FrFD {
 394         struct FDesc fd;
 395         struct BDesc bd[RX_BUF_NUM];
 396 };
 397
 398
 399 #define tc_readl(addr)  readl(addr)
 400 #define tc_writel(d, addr)      writel(d, addr)
 401
 402 #define TC35815_TX_TIMEOUT  msecs_to_jiffies(400)
 403
 404 /* Timer state engine. */
 405 enum tc35815_timer_state {
 406         arbwait  = 0,   /* Waiting for auto negotiation to complete.          */
 407         lupwait  = 1,   /* Auto-neg complete, awaiting link-up status.        */
 408         ltrywait = 2,   /* Forcing try of all modes, from fastest to slowest. */
 409         asleep   = 3,   /* Time inactive.                                     */
 410         lcheck   = 4,   /* Check link status.                                 */
 411 };
 412
 413 /* Information that need to be kept for each board. */
 414 struct tc35815_local {
 415         struct pci_dev *pci_dev;
 416
 417         struct net_device *dev;
 418         struct napi_struct napi;
 419
 420         /* statistics */
 421         struct net_device_stats stats;
 422         struct {
 423                 int max_tx_qlen;
 424                 int tx_ints;
 425                 int rx_ints;
 426                 int tx_underrun;
 427         } lstats;
 428
 429         /* Tx control lock.  This protects the transmit buffer ring
 430          * state along with the "tx full" state of the driver.  This
 431          * means all netif_queue flow control actions are protected
 432          * by this lock as well.
 433          */
 434         spinlock_t lock;
 435
 436         int phy_addr;
 437         int fullduplex;
 438         unsigned short saved_lpa;
 439         struct timer_list timer;
 440         enum tc35815_timer_state timer_state; /* State of auto-neg timer. */
 441         unsigned int timer_ticks;       /* Number of clicks at each state  */
 442
 443         /*
 444          * Transmitting: Batch Mode.
 445          *      1 BD in 1 TxFD.
 446          * Receiving: Packing Mode. (TC35815_USE_PACKEDBUFFER)
 447          *      1 circular FD for Free Buffer List.
 448          *      RX_BUF_NUM BD in Free Buffer FD.
 449          *      One Free Buffer BD has PAGE_SIZE data buffer.
 450          * Or Non-Packing Mode.
 451          *      1 circular FD for Free Buffer List.
 452          *      RX_BUF_NUM BD in Free Buffer FD.
 453          *      One Free Buffer BD has ETH_FRAME_LEN data buffer.
 454          */
 455         void * fd_buf;  /* for TxFD, RxFD, FrFD */
 456         dma_addr_t fd_buf_dma;
 457         struct TxFD *tfd_base;
 458         unsigned int tfd_start;
 459         unsigned int tfd_end;
 460         struct RxFD *rfd_base;
 461         struct RxFD *rfd_limit;
 462         struct RxFD *rfd_cur;
 463         struct FrFD *fbl_ptr;
 464 #ifdef TC35815_USE_PACKEDBUFFER
 465         unsigned char fbl_curid;
 466         void * data_buf[RX_BUF_NUM];            /* packing */
 467         dma_addr_t data_buf_dma[RX_BUF_NUM];
 468         struct {
 469                 struct sk_buff *skb;
 470                 dma_addr_t skb_dma;
 471         } tx_skbs[TX_FD_NUM];
 472 #else
 473         unsigned int fbl_count;
 474         struct {
 475                 struct sk_buff *skb;
 476                 dma_addr_t skb_dma;
 477         } tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
 478 #endif
 479         struct mii_if_info mii;
 480         unsigned short mii_id[2];
 481         u32 msg_enable;
 482         board_t boardtype;
 483 };
 484
 485 static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
 486 {
 487         return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
 488 }
 489 #ifdef DEBUG
 490 static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
 491 {
 492         return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
 493 }
 494 #endif
 495 #ifdef TC35815_USE_PACKEDBUFFER
 496 static inline void *rxbuf_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
 497 {
 498         int i;
 499         for (i = 0; i < RX_BUF_NUM; i++) {
 500                 if (bus >= lp->data_buf_dma[i] &&
 501                     bus < lp->data_buf_dma[i] + PAGE_SIZE)
 502                         return (void *)((u8 *)lp->data_buf[i] +
 503                                         (bus - lp->data_buf_dma[i]));
 504         }
 505         return NULL;
 506 }
 507
 508 #define TC35815_DMA_SYNC_ONDEMAND
 509 static void* alloc_rxbuf_page(struct pci_dev *hwdev, dma_addr_t *dma_handle)
 510 {
 511 #ifdef TC35815_DMA_SYNC_ONDEMAND
 512         void *buf;
 513         /* pci_map + pci_dma_sync will be more effective than
 514          * pci_alloc_consistent on some archs. */
 515         if ((buf = (void *)__get_free_page(GFP_ATOMIC)) == NULL)
 516                 return NULL;
 517         *dma_handle = pci_map_single(hwdev, buf, PAGE_SIZE,
 518                                      PCI_DMA_FROMDEVICE);
 519         if (pci_dma_mapping_error(*dma_handle)) {
 520                 free_page((unsigned long)buf);
 521                 return NULL;
 522         }
 523         return buf;
 524 #else
 525         return pci_alloc_consistent(hwdev, PAGE_SIZE, dma_handle);
 526 #endif
 527 }
 528
 529 static void free_rxbuf_page(struct pci_dev *hwdev, void *buf, dma_addr_t dma_handle)
 530 {
 531 #ifdef TC35815_DMA_SYNC_ONDEMAND
 532         pci_unmap_single(hwdev, dma_handle, PAGE_SIZE, PCI_DMA_FROMDEVICE);
 533         free_page((unsigned long)buf);
 534 #else
 535         pci_free_consistent(hwdev, PAGE_SIZE, buf, dma_handle);
 536 #endif
 537 }
 538 #else /* TC35815_USE_PACKEDBUFFER */
 539 static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
 540                                        struct pci_dev *hwdev,
 541                                        dma_addr_t *dma_handle)
 542 {
 543         struct sk_buff *skb;
 544         skb = dev_alloc_skb(RX_BUF_SIZE);
 545         if (!skb)
 546                 return NULL;
 547         *dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
 548                                      PCI_DMA_FROMDEVICE);
 549         if (pci_dma_mapping_error(*dma_handle)) {
 550                 dev_kfree_skb_any(skb);
 551                 return NULL;
 552         }
 553         skb_reserve(skb, 2);    /* make IP header 4byte aligned */
 554         return skb;
 555 }
 556
 557 static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
 558 {
 559         pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
 560                          PCI_DMA_FROMDEVICE);
 561         dev_kfree_skb_any(skb);
 562 }
 563 #endif /* TC35815_USE_PACKEDBUFFER */
 564
 565 /* Index to functions, as function prototypes. */
 566
 567 static int      tc35815_open(struct net_device *dev);
 568 static int      tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
 569 static irqreturn_t      tc35815_interrupt(int irq, void *dev_id);
 570 #ifdef TC35815_NAPI
 571 static int      tc35815_rx(struct net_device *dev, int limit);
 572 static int      tc35815_poll(struct napi_struct *napi, int budget);
 573 #else
 574 static void     tc35815_rx(struct net_device *dev);
 575 #endif
 576 static void     tc35815_txdone(struct net_device *dev);
 577 static int      tc35815_close(struct net_device *dev);
 578 static struct   net_device_stats *tc35815_get_stats(struct net_device *dev);
 579 static void     tc35815_set_multicast_list(struct net_device *dev);
 580 static void     tc35815_tx_timeout(struct net_device *dev);
 581 static int      tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 582 #ifdef CONFIG_NET_POLL_CONTROLLER
 583 static void     tc35815_poll_controller(struct net_device *dev);
 584 #endif
 585 static const struct ethtool_ops tc35815_ethtool_ops;
 586
 587 /* Example routines you must write ;->. */
 588 static void     tc35815_chip_reset(struct net_device *dev);
 589 static void     tc35815_chip_init(struct net_device *dev);
 590 static void     tc35815_find_phy(struct net_device *dev);
 591 static void     tc35815_phy_chip_init(struct net_device *dev);
 592
 593 #ifdef DEBUG
 594 static void     panic_queues(struct net_device *dev);
 595 #endif
 596
 597 static void tc35815_timer(unsigned long data);
 598 static void tc35815_start_auto_negotiation(struct net_device *dev,
 599                                            struct ethtool_cmd *ep);
 600 static int tc_mdio_read(struct net_device *dev, int phy_id, int location);
 601 static void tc_mdio_write(struct net_device *dev, int phy_id, int location,
 602                           int val);
 603
 604 #ifdef CONFIG_CPU_TX49XX
 605 /*
 606  * Find a platform_device providing a MAC address.  The platform code
 607  * should provide a "tc35815-mac" device with a MAC address in its
 608  * platform_data.
 609  */
 610 static int __devinit tc35815_mac_match(struct device *dev, void *data)
 611 {
 612         struct platform_device *plat_dev = to_platform_device(dev);
 613         struct pci_dev *pci_dev = data;
 614         unsigned int id = (pci_dev->bus->number << 8) | pci_dev->devfn;
 615         return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
 616 }
 617
 618 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
 619 {
 620         struct tc35815_local *lp = dev->priv;
 621         struct device *pd = bus_find_device(&platform_bus_type, NULL,
 622                                             lp->pci_dev, tc35815_mac_match);
 623         if (pd) {
 624                 if (pd->platform_data)
 625                         memcpy(dev->dev_addr, pd->platform_data, ETH_ALEN);
 626                 put_device(pd);
 627                 return is_valid_ether_addr(dev->dev_addr) ? 0 : -ENODEV;
 628         }
 629         return -ENODEV;
 630 }
 631 #else
 632 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
 633 {
 634         return -ENODEV;
 635 }
 636 #endif
 637
 638 static int __devinit tc35815_init_dev_addr (struct net_device *dev)
 639 {
 640         struct tc35815_regs __iomem *tr =
 641                 (struct tc35815_regs __iomem *)dev->base_addr;
 642         int i;
 643
 644         while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 645                 ;
 646         for (i = 0; i < 6; i += 2) {
 647                 unsigned short data;
 648                 tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
 649                 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 650                         ;
 651                 data = tc_readl(&tr->PROM_Data);
 652                 dev->dev_addr[i] = data & 0xff;
 653                 dev->dev_addr[i+1] = data >> 8;
 654         }
 655         if (!is_valid_ether_addr(dev->dev_addr))
 656                 return tc35815_read_plat_dev_addr(dev);
 657         return 0;
 658 }
 659
 660 static int __devinit tc35815_init_one (struct pci_dev *pdev,
 661                                        const struct pci_device_id *ent)
 662 {
 663         void __iomem *ioaddr = NULL;
 664         struct net_device *dev;
 665         struct tc35815_local *lp;
 666         int rc;
 667         unsigned long mmio_start, mmio_end, mmio_flags, mmio_len;
 668
 669         static int printed_version;
 670         if (!printed_version++) {
 671                 printk(version);
 672                 dev_printk(KERN_DEBUG, &pdev->dev,
 673                            "speed:%d duplex:%d doforce:%d\n",
 674                            options.speed, options.duplex, options.doforce);
 675         }
 676
 677         if (!pdev->irq) {
 678                 dev_warn(&pdev->dev, "no IRQ assigned.\n");
 679                 return -ENODEV;
 680         }
 681
 682         /* dev zeroed in alloc_etherdev */
 683         dev = alloc_etherdev (sizeof (*lp));
 684         if (dev == NULL) {
 685                 dev_err(&pdev->dev, "unable to alloc new ethernet\n");
 686                 return -ENOMEM;
 687         }
 688         SET_NETDEV_DEV(dev, &pdev->dev);
 689         lp = dev->priv;
 690         lp->dev = dev;
 691
 692         /* enable device (incl. PCI PM wakeup), and bus-mastering */
 693         rc = pci_enable_device (pdev);
 694         if (rc)
 695                 goto err_out;
 696
 697         mmio_start = pci_resource_start (pdev, 1);
 698         mmio_end = pci_resource_end (pdev, 1);
 699         mmio_flags = pci_resource_flags (pdev, 1);
 700         mmio_len = pci_resource_len (pdev, 1);
 701
 702         /* set this immediately, we need to know before
 703          * we talk to the chip directly */
 704
 705         /* make sure PCI base addr 1 is MMIO */
 706         if (!(mmio_flags & IORESOURCE_MEM)) {
 707                 dev_err(&pdev->dev, "region #1 not an MMIO resource, aborting\n");
 708                 rc = -ENODEV;
 709                 goto err_out;
 710         }
 711
 712         /* check for weird/broken PCI region reporting */
 713         if ((mmio_len < sizeof(struct tc35815_regs))) {
 714                 dev_err(&pdev->dev, "Invalid PCI region size(s), aborting\n");
 715                 rc = -ENODEV;
 716                 goto err_out;
 717         }
 718
 719         rc = pci_request_regions (pdev, MODNAME);
 720         if (rc)
 721                 goto err_out;
 722
 723         pci_set_master (pdev);
 724
 725         /* ioremap MMIO region */
 726         ioaddr = ioremap (mmio_start, mmio_len);
 727         if (ioaddr == NULL) {
 728                 dev_err(&pdev->dev, "cannot remap MMIO, aborting\n");
 729                 rc = -EIO;
 730                 goto err_out_free_res;
 731         }
 732
 733         /* Initialize the device structure. */
 734         dev->open = tc35815_open;
 735         dev->hard_start_xmit = tc35815_send_packet;
 736         dev->stop = tc35815_close;
 737         dev->get_stats = tc35815_get_stats;
 738         dev->set_multicast_list = tc35815_set_multicast_list;
 739         dev->do_ioctl = tc35815_ioctl;
 740         dev->ethtool_ops = &tc35815_ethtool_ops;
 741         dev->tx_timeout = tc35815_tx_timeout;
 742         dev->watchdog_timeo = TC35815_TX_TIMEOUT;
 743 #ifdef TC35815_NAPI
 744         netif_napi_add(dev, &lp->napi, tc35815_poll, NAPI_WEIGHT);
 745 #endif
 746 #ifdef CONFIG_NET_POLL_CONTROLLER
 747         dev->poll_controller = tc35815_poll_controller;
 748 #endif
 749
 750         dev->irq = pdev->irq;
 751         dev->base_addr = (unsigned long) ioaddr;
 752
 753         spin_lock_init(&lp->lock);
 754         lp->pci_dev = pdev;
 755         lp->boardtype = ent->driver_data;
 756
 757         lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
 758         pci_set_drvdata(pdev, dev);
 759
 760         /* Soft reset the chip. */
 761         tc35815_chip_reset(dev);
 762
 763         /* Retrieve the ethernet address. */
 764         if (tc35815_init_dev_addr(dev)) {
 765                 dev_warn(&pdev->dev, "not valid ether addr\n");
 766                 random_ether_addr(dev->dev_addr);
 767         }
 768
 769         rc = register_netdev (dev);
 770         if (rc)
 771                 goto err_out_unmap;
 772
 773         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
 774         printk(KERN_INFO "%s: %s at 0x%lx, "
 775                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
 776                 "IRQ %d\n",
 777                 dev->name,
 778                 board_info[ent->driver_data].name,
 779                 dev->base_addr,
 780                 dev->dev_addr[0], dev->dev_addr[1],
 781                 dev->dev_addr[2], dev->dev_addr[3],
 782                 dev->dev_addr[4], dev->dev_addr[5],
 783                 dev->irq);
 784
 785         setup_timer(&lp->timer, tc35815_timer, (unsigned long) dev);
 786         lp->mii.dev = dev;
 787         lp->mii.mdio_read = tc_mdio_read;
 788         lp->mii.mdio_write = tc_mdio_write;
 789         lp->mii.phy_id_mask = 0x1f;
 790         lp->mii.reg_num_mask = 0x1f;
 791         tc35815_find_phy(dev);
 792         lp->mii.phy_id = lp->phy_addr;
 793         lp->mii.full_duplex = 0;
 794         lp->mii.force_media = 0;
 795
 796         return 0;
 797
 798 err_out_unmap:
 799         iounmap(ioaddr);
 800 err_out_free_res:
 801         pci_release_regions (pdev);
 802 err_out:
 803         free_netdev (dev);
 804         return rc;
 805 }
 806
 807
 808 static void __devexit tc35815_remove_one (struct pci_dev *pdev)
 809 {
 810         struct net_device *dev = pci_get_drvdata (pdev);
 811         unsigned long mmio_addr;
 812
 813         mmio_addr = dev->base_addr;
 814
 815         unregister_netdev (dev);
 816
 817         if (mmio_addr) {
 818                 iounmap ((void __iomem *)mmio_addr);
 819                 pci_release_regions (pdev);
 820         }
 821
 822         free_netdev (dev);
 823
 824         pci_set_drvdata (pdev, NULL);
 825 }
 826
 827 static int
 828 tc35815_init_queues(struct net_device *dev)
 829 {
 830         struct tc35815_local *lp = dev->priv;
 831         int i;
 832         unsigned long fd_addr;
 833
 834         if (!lp->fd_buf) {
 835                 BUG_ON(sizeof(struct FDesc) +
 836                        sizeof(struct BDesc) * RX_BUF_NUM +
 837                        sizeof(struct FDesc) * RX_FD_NUM +
 838                        sizeof(struct TxFD) * TX_FD_NUM >
 839                        PAGE_SIZE * FD_PAGE_NUM);
 840
 841                 if ((lp->fd_buf = pci_alloc_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM, &lp->fd_buf_dma)) == 0)
 842                         return -ENOMEM;
 843                 for (i = 0; i < RX_BUF_NUM; i++) {
 844 #ifdef TC35815_USE_PACKEDBUFFER
 845                         if ((lp->data_buf[i] = alloc_rxbuf_page(lp->pci_dev, &lp->data_buf_dma[i])) == NULL) {
 846                                 while (--i >= 0) {
 847                                         free_rxbuf_page(lp->pci_dev,
 848                                                         lp->data_buf[i],
 849                                                         lp->data_buf_dma[i]);
 850                                         lp->data_buf[i] = NULL;
 851                                 }
 852                                 pci_free_consistent(lp->pci_dev,
 853                                                     PAGE_SIZE * FD_PAGE_NUM,
 854                                                     lp->fd_buf,
 855                                                     lp->fd_buf_dma);
 856                                 lp->fd_buf = NULL;
 857                                 return -ENOMEM;
 858                         }
 859 #else
 860                         lp->rx_skbs[i].skb =
 861                                 alloc_rxbuf_skb(dev, lp->pci_dev,
 862                                                 &lp->rx_skbs[i].skb_dma);
 863                         if (!lp->rx_skbs[i].skb) {
 864                                 while (--i >= 0) {
 865                                         free_rxbuf_skb(lp->pci_dev,
 866                                                        lp->rx_skbs[i].skb,
 867                                                        lp->rx_skbs[i].skb_dma);
 868                                         lp->rx_skbs[i].skb = NULL;
 869                                 }
 870                                 pci_free_consistent(lp->pci_dev,
 871                                                     PAGE_SIZE * FD_PAGE_NUM,
 872                                                     lp->fd_buf,
 873                                                     lp->fd_buf_dma);
 874                                 lp->fd_buf = NULL;
 875                                 return -ENOMEM;
 876                         }
 877 #endif
 878                 }
 879                 printk(KERN_DEBUG "%s: FD buf %p DataBuf",
 880                        dev->name, lp->fd_buf);
 881 #ifdef TC35815_USE_PACKEDBUFFER
 882                 printk(" DataBuf");
 883                 for (i = 0; i < RX_BUF_NUM; i++)
 884                         printk(" %p", lp->data_buf[i]);
 885 #endif
 886                 printk("\n");
 887         } else {
 888                 for (i = 0; i < FD_PAGE_NUM; i++) {
 889                         clear_page((void *)((unsigned long)lp->fd_buf + i * PAGE_SIZE));
 890                 }
 891         }
 892         fd_addr = (unsigned long)lp->fd_buf;
 893
 894         /* Free Descriptors (for Receive) */
 895         lp->rfd_base = (struct RxFD *)fd_addr;
 896         fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
 897         for (i = 0; i < RX_FD_NUM; i++) {
 898                 lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
 899         }
 900         lp->rfd_cur = lp->rfd_base;
 901         lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
 902
 903         /* Transmit Descriptors */
 904         lp->tfd_base = (struct TxFD *)fd_addr;
 905         fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
 906         for (i = 0; i < TX_FD_NUM; i++) {
 907                 lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
 908                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 909                 lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
 910         }
 911         lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
 912         lp->tfd_start = 0;
 913         lp->tfd_end = 0;
 914
 915         /* Buffer List (for Receive) */
 916         lp->fbl_ptr = (struct FrFD *)fd_addr;
 917         lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
 918         lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
 919 #ifndef TC35815_USE_PACKEDBUFFER
 920         /*
 921          * move all allocated skbs to head of rx_skbs[] array.
 922          * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
 923          * tc35815_rx() had failed.
 924          */
 925         lp->fbl_count = 0;
 926         for (i = 0; i < RX_BUF_NUM; i++) {
 927                 if (lp->rx_skbs[i].skb) {
 928                         if (i != lp->fbl_count) {
 929                                 lp->rx_skbs[lp->fbl_count].skb =
 930                                         lp->rx_skbs[i].skb;
 931                                 lp->rx_skbs[lp->fbl_count].skb_dma =
 932                                         lp->rx_skbs[i].skb_dma;
 933                         }
 934                         lp->fbl_count++;
 935                 }
 936         }
 937 #endif
 938         for (i = 0; i < RX_BUF_NUM; i++) {
 939 #ifdef TC35815_USE_PACKEDBUFFER
 940                 lp->fbl_ptr->bd[i].BuffData = cpu_to_le32(lp->data_buf_dma[i]);
 941 #else
 942                 if (i >= lp->fbl_count) {
 943                         lp->fbl_ptr->bd[i].BuffData = 0;
 944                         lp->fbl_ptr->bd[i].BDCtl = 0;
 945                         continue;
 946                 }
 947                 lp->fbl_ptr->bd[i].BuffData =
 948                         cpu_to_le32(lp->rx_skbs[i].skb_dma);
 949 #endif
 950                 /* BDID is index of FrFD.bd[] */
 951                 lp->fbl_ptr->bd[i].BDCtl =
 952                         cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
 953                                     RX_BUF_SIZE);
 954         }
 955 #ifdef TC35815_USE_PACKEDBUFFER
 956         lp->fbl_curid = 0;
 957 #endif
 958
 959         printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
 960                dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
 961         return 0;
 962 }
 963
 964 static void
 965 tc35815_clear_queues(struct net_device *dev)
 966 {
 967         struct tc35815_local *lp = dev->priv;
 968         int i;
 969
 970         for (i = 0; i < TX_FD_NUM; i++) {
 971                 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
 972                 struct sk_buff *skb =
 973                         fdsystem != 0xffffffff ?
 974                         lp->tx_skbs[fdsystem].skb : NULL;
 975 #ifdef DEBUG
 976                 if (lp->tx_skbs[i].skb != skb) {
 977                         printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
 978                         panic_queues(dev);
 979                 }
 980 #else
 981                 BUG_ON(lp->tx_skbs[i].skb != skb);
 982 #endif
 983                 if (skb) {
 984                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
 985                         lp->tx_skbs[i].skb = NULL;
 986                         lp->tx_skbs[i].skb_dma = 0;
 987                         dev_kfree_skb_any(skb);
 988                 }
 989                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 990         }
 991
 992         tc35815_init_queues(dev);
 993 }
 994
 995 static void
 996 tc35815_free_queues(struct net_device *dev)
 997 {
 998         struct tc35815_local *lp = dev->priv;
 999         int i;
1000
1001         if (lp->tfd_base) {
1002                 for (i = 0; i < TX_FD_NUM; i++) {
1003                         u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1004                         struct sk_buff *skb =
1005                                 fdsystem != 0xffffffff ?
1006                                 lp->tx_skbs[fdsystem].skb : NULL;
1007 #ifdef DEBUG
1008                         if (lp->tx_skbs[i].skb != skb) {
1009                                 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1010                                 panic_queues(dev);
1011                         }
1012 #else
1013                         BUG_ON(lp->tx_skbs[i].skb != skb);
1014 #endif
1015                         if (skb) {
1016                                 dev_kfree_skb(skb);
1017                                 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1018                                 lp->tx_skbs[i].skb = NULL;
1019                                 lp->tx_skbs[i].skb_dma = 0;
1020                         }
1021                         lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1022                 }
1023         }
1024
1025         lp->rfd_base = NULL;
1026         lp->rfd_limit = NULL;
1027         lp->rfd_cur = NULL;
1028         lp->fbl_ptr = NULL;
1029
1030         for (i = 0; i < RX_BUF_NUM; i++) {
1031 #ifdef TC35815_USE_PACKEDBUFFER
1032                 if (lp->data_buf[i]) {
1033                         free_rxbuf_page(lp->pci_dev,
1034                                         lp->data_buf[i], lp->data_buf_dma[i]);
1035                         lp->data_buf[i] = NULL;
1036                 }
1037 #else
1038                 if (lp->rx_skbs[i].skb) {
1039                         free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
1040                                        lp->rx_skbs[i].skb_dma);
1041                         lp->rx_skbs[i].skb = NULL;
1042                 }
1043 #endif
1044         }
1045         if (lp->fd_buf) {
1046                 pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
1047                                     lp->fd_buf, lp->fd_buf_dma);
1048                 lp->fd_buf = NULL;
1049         }
1050 }
1051
1052 static void
1053 dump_txfd(struct TxFD *fd)
1054 {
1055         printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
1056                le32_to_cpu(fd->fd.FDNext),
1057                le32_to_cpu(fd->fd.FDSystem),
1058                le32_to_cpu(fd->fd.FDStat),
1059                le32_to_cpu(fd->fd.FDCtl));
1060         printk("BD: ");
1061         printk(" %08x %08x",
1062                le32_to_cpu(fd->bd.BuffData),
1063                le32_to_cpu(fd->bd.BDCtl));
1064         printk("\n");
1065 }
1066
1067 static int
1068 dump_rxfd(struct RxFD *fd)
1069 {
1070         int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1071         if (bd_count > 8)
1072                 bd_count = 8;
1073         printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
1074                le32_to_cpu(fd->fd.FDNext),
1075                le32_to_cpu(fd->fd.FDSystem),
1076                le32_to_cpu(fd->fd.FDStat),
1077                le32_to_cpu(fd->fd.FDCtl));
1078         if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
1079             return 0;
1080         printk("BD: ");
1081         for (i = 0; i < bd_count; i++)
1082                 printk(" %08x %08x",
1083                        le32_to_cpu(fd->bd[i].BuffData),
1084                        le32_to_cpu(fd->bd[i].BDCtl));
1085         printk("\n");
1086         return bd_count;
1087 }
1088
1089 #if defined(DEBUG) || defined(TC35815_USE_PACKEDBUFFER)
1090 static void
1091 dump_frfd(struct FrFD *fd)
1092 {
1093         int i;
1094         printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
1095                le32_to_cpu(fd->fd.FDNext),
1096                le32_to_cpu(fd->fd.FDSystem),
1097                le32_to_cpu(fd->fd.FDStat),
1098                le32_to_cpu(fd->fd.FDCtl));
1099         printk("BD: ");
1100         for (i = 0; i < RX_BUF_NUM; i++)
1101                 printk(" %08x %08x",
1102                        le32_to_cpu(fd->bd[i].BuffData),
1103                        le32_to_cpu(fd->bd[i].BDCtl));
1104         printk("\n");
1105 }
1106 #endif
1107
1108 #ifdef DEBUG
1109 static void
1110 panic_queues(struct net_device *dev)
1111 {
1112         struct tc35815_local *lp = dev->priv;
1113         int i;
1114
1115         printk("TxFD base %p, start %u, end %u\n",
1116                lp->tfd_base, lp->tfd_start, lp->tfd_end);
1117         printk("RxFD base %p limit %p cur %p\n",
1118                lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
1119         printk("FrFD %p\n", lp->fbl_ptr);
1120         for (i = 0; i < TX_FD_NUM; i++)
1121                 dump_txfd(&lp->tfd_base[i]);
1122         for (i = 0; i < RX_FD_NUM; i++) {
1123                 int bd_count = dump_rxfd(&lp->rfd_base[i]);
1124                 i += (bd_count + 1) / 2;        /* skip BDs */
1125         }
1126         dump_frfd(lp->fbl_ptr);
1127         panic("%s: Illegal queue state.", dev->name);
1128 }
1129 #endif
1130
1131 static void print_eth(char *add)
1132 {
1133         int i;
1134
1135         printk("print_eth(%p)\n", add);
1136         for (i = 0; i < 6; i++)
1137                 printk(" %2.2X", (unsigned char) add[i + 6]);
1138         printk(" =>");
1139         for (i = 0; i < 6; i++)
1140                 printk(" %2.2X", (unsigned char) add[i]);
1141         printk(" : %2.2X%2.2X\n", (unsigned char) add[12], (unsigned char) add[13]);
1142 }
1143
1144 static int tc35815_tx_full(struct net_device *dev)
1145 {
1146         struct tc35815_local *lp = dev->priv;
1147         return ((lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end);
1148 }
1149
1150 static void tc35815_restart(struct net_device *dev)
1151 {
1152         struct tc35815_local *lp = dev->priv;
1153         int pid = lp->phy_addr;
1154         int do_phy_reset = 1;
1155         del_timer(&lp->timer);          /* Kill if running      */
1156
1157         if (lp->mii_id[0] == 0x0016 && (lp->mii_id[1] & 0xfc00) == 0xf800) {
1158                 /* Resetting PHY cause problem on some chip... (SEEQ 80221) */
1159                 do_phy_reset = 0;
1160         }
1161         if (do_phy_reset) {
1162                 int timeout;
1163                 tc_mdio_write(dev, pid, MII_BMCR, BMCR_RESET);
1164                 timeout = 100;
1165                 while (--timeout) {
1166                         if (!(tc_mdio_read(dev, pid, MII_BMCR) & BMCR_RESET))
1167                                 break;
1168                         udelay(1);
1169                 }
1170                 if (!timeout)
1171                         printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
1172         }
1173
1174         tc35815_chip_reset(dev);
1175         tc35815_clear_queues(dev);
1176         tc35815_chip_init(dev);
1177         /* Reconfigure CAM again since tc35815_chip_init() initialize it. */
1178         tc35815_set_multicast_list(dev);
1179 }
1180
1181 static void tc35815_tx_timeout(struct net_device *dev)
1182 {
1183         struct tc35815_local *lp = dev->priv;
1184         struct tc35815_regs __iomem *tr =
1185                 (struct tc35815_regs __iomem *)dev->base_addr;
1186
1187         printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
1188                dev->name, tc_readl(&tr->Tx_Stat));
1189
1190         /* Try to restart the adaptor. */
1191         spin_lock_irq(&lp->lock);
1192         tc35815_restart(dev);
1193         spin_unlock_irq(&lp->lock);
1194
1195         lp->stats.tx_errors++;
1196
1197         /* If we have space available to accept new transmit
1198          * requests, wake up the queueing layer.  This would
1199          * be the case if the chipset_init() call above just
1200          * flushes out the tx queue and empties it.
1201          *
1202          * If instead, the tx queue is retained then the
1203          * netif_wake_queue() call should be placed in the
1204          * TX completion interrupt handler of the driver instead
1205          * of here.
1206          */
1207         if (!tc35815_tx_full(dev))
1208                 netif_wake_queue(dev);
1209 }
1210
1211 /*
1212  * Open/initialize the board. This is called (in the current kernel)
1213  * sometime after booting when the 'ifconfig' program is run.
1214  *
1215  * This routine should set everything up anew at each open, even
1216  * registers that "should" only need to be set once at boot, so that
1217  * there is non-reboot way to recover if something goes wrong.
1218  */
1219 static int
1220 tc35815_open(struct net_device *dev)
1221 {
1222         struct tc35815_local *lp = dev->priv;
1223
1224         /*
1225          * This is used if the interrupt line can turned off (shared).
1226          * See 3c503.c for an example of selecting the IRQ at config-time.
1227          */
1228         if (request_irq(dev->irq, &tc35815_interrupt, IRQF_SHARED, dev->name, dev)) {
1229                 return -EAGAIN;
1230         }
1231
1232         del_timer(&lp->timer);          /* Kill if running      */
1233         tc35815_chip_reset(dev);
1234
1235         if (tc35815_init_queues(dev) != 0) {
1236                 free_irq(dev->irq, dev);
1237                 return -EAGAIN;
1238         }
1239
1240 #ifdef TC35815_NAPI
1241         napi_enable(&lp->napi);
1242 #endif
1243
1244         /* Reset the hardware here. Don't forget to set the station address. */
1245         spin_lock_irq(&lp->lock);
1246         tc35815_chip_init(dev);
1247         spin_unlock_irq(&lp->lock);
1248
1249         /* We are now ready to accept transmit requeusts from
1250          * the queueing layer of the networking.
1251          */
1252         netif_start_queue(dev);
1253
1254         return 0;
1255 }
1256
1257 /* This will only be invoked if your driver is _not_ in XOFF state.
1258  * What this means is that you need not check it, and that this
1259  * invariant will hold if you make sure that the netif_*_queue()
1260  * calls are done at the proper times.
1261  */
1262 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
1263 {
1264         struct tc35815_local *lp = dev->priv;
1265         struct TxFD *txfd;
1266         unsigned long flags;
1267
1268         /* If some error occurs while trying to transmit this
1269          * packet, you should return '1' from this function.
1270          * In such a case you _may not_ do anything to the
1271          * SKB, it is still owned by the network queueing
1272          * layer when an error is returned.  This means you
1273          * may not modify any SKB fields, you may not free
1274          * the SKB, etc.
1275          */
1276
1277         /* This is the most common case for modern hardware.
1278          * The spinlock protects this code from the TX complete
1279          * hardware interrupt handler.  Queue flow control is
1280          * thus managed under this lock as well.
1281          */
1282         spin_lock_irqsave(&lp->lock, flags);
1283
1284         /* failsafe... (handle txdone now if half of FDs are used) */
1285         if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
1286             TX_FD_NUM / 2)
1287                 tc35815_txdone(dev);
1288
1289         if (netif_msg_pktdata(lp))
1290                 print_eth(skb->data);
1291 #ifdef DEBUG
1292         if (lp->tx_skbs[lp->tfd_start].skb) {
1293                 printk("%s: tx_skbs conflict.\n", dev->name);
1294                 panic_queues(dev);
1295         }
1296 #else
1297         BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
1298 #endif
1299         lp->tx_skbs[lp->tfd_start].skb = skb;
1300         lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1301
1302         /*add to ring */
1303         txfd = &lp->tfd_base[lp->tfd_start];
1304         txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
1305         txfd->bd.BDCtl = cpu_to_le32(skb->len);
1306         txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
1307         txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
1308
1309         if (lp->tfd_start == lp->tfd_end) {
1310                 struct tc35815_regs __iomem *tr =
1311                         (struct tc35815_regs __iomem *)dev->base_addr;
1312                 /* Start DMA Transmitter. */
1313                 txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1314 #ifdef GATHER_TXINT
1315                 txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1316 #endif
1317                 if (netif_msg_tx_queued(lp)) {
1318                         printk("%s: starting TxFD.\n", dev->name);
1319                         dump_txfd(txfd);
1320                 }
1321                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1322         } else {
1323                 txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
1324                 if (netif_msg_tx_queued(lp)) {
1325                         printk("%s: queueing TxFD.\n", dev->name);
1326                         dump_txfd(txfd);
1327                 }
1328         }
1329         lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
1330
1331         dev->trans_start = jiffies;
1332
1333         /* If we just used up the very last entry in the
1334          * TX ring on this device, tell the queueing
1335          * layer to send no more.
1336          */
1337         if (tc35815_tx_full(dev)) {
1338                 if (netif_msg_tx_queued(lp))
1339                         printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
1340                 netif_stop_queue(dev);
1341         }
1342
1343         /* When the TX completion hw interrupt arrives, this
1344          * is when the transmit statistics are updated.
1345          */
1346
1347         spin_unlock_irqrestore(&lp->lock, flags);
1348         return 0;
1349 }
1350
1351 #define FATAL_ERROR_INT \
1352         (Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
1353 static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
1354 {
1355         static int count;
1356         printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
1357                dev->name, status);
1358         if (status & Int_IntPCI)
1359                 printk(" IntPCI");
1360         if (status & Int_DmParErr)
1361                 printk(" DmParErr");
1362         if (status & Int_IntNRAbt)
1363                 printk(" IntNRAbt");
1364         printk("\n");
1365         if (count++ > 100)
1366                 panic("%s: Too many fatal errors.", dev->name);
1367         printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
1368         /* Try to restart the adaptor. */
1369         tc35815_restart(dev);
1370 }
1371
1372 #ifdef TC35815_NAPI
1373 static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
1374 #else
1375 static int tc35815_do_interrupt(struct net_device *dev, u32 status)
1376 #endif
1377 {
1378         struct tc35815_local *lp = dev->priv;
1379         struct tc35815_regs __iomem *tr =
1380                 (struct tc35815_regs __iomem *)dev->base_addr;
1381         int ret = -1;
1382
1383         /* Fatal errors... */
1384         if (status & FATAL_ERROR_INT) {
1385                 tc35815_fatal_error_interrupt(dev, status);
1386                 return 0;
1387         }
1388         /* recoverable errors */
1389         if (status & Int_IntFDAEx) {
1390                 /* disable FDAEx int. (until we make rooms...) */
1391                 tc_writel(tc_readl(&tr->Int_En) & ~Int_FDAExEn, &tr->Int_En);
1392                 printk(KERN_WARNING
1393                        "%s: Free Descriptor Area Exhausted (%#x).\n",
1394                        dev->name, status);
1395                 lp->stats.rx_dropped++;
1396                 ret = 0;
1397         }
1398         if (status & Int_IntBLEx) {
1399                 /* disable BLEx int. (until we make rooms...) */
1400                 tc_writel(tc_readl(&tr->Int_En) & ~Int_BLExEn, &tr->Int_En);
1401                 printk(KERN_WARNING
1402                        "%s: Buffer List Exhausted (%#x).\n",
1403                        dev->name, status);
1404                 lp->stats.rx_dropped++;
1405                 ret = 0;
1406         }
1407         if (status & Int_IntExBD) {
1408                 printk(KERN_WARNING
1409                        "%s: Excessive Buffer Descriptiors (%#x).\n",
1410                        dev->name, status);
1411                 lp->stats.rx_length_errors++;
1412                 ret = 0;
1413         }
1414
1415         /* normal notification */
1416         if (status & Int_IntMacRx) {
1417                 /* Got a packet(s). */
1418 #ifdef TC35815_NAPI
1419                 ret = tc35815_rx(dev, limit);
1420 #else
1421                 tc35815_rx(dev);
1422                 ret = 0;
1423 #endif
1424                 lp->lstats.rx_ints++;
1425         }
1426         if (status & Int_IntMacTx) {
1427                 /* Transmit complete. */
1428                 lp->lstats.tx_ints++;
1429                 tc35815_txdone(dev);
1430                 netif_wake_queue(dev);
1431                 ret = 0;
1432         }
1433         return ret;
1434 }
1435
1436 /*
1437  * The typical workload of the driver:
1438  * Handle the network interface interrupts.
1439  */
1440 static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
1441 {
1442         struct net_device *dev = dev_id;
1443         struct tc35815_local *lp = netdev_priv(dev);
1444         struct tc35815_regs __iomem *tr =
1445                 (struct tc35815_regs __iomem *)dev->base_addr;
1446 #ifdef TC35815_NAPI
1447         u32 dmactl = tc_readl(&tr->DMA_Ctl);
1448
1449         if (!(dmactl & DMA_IntMask)) {
1450                 /* disable interrupts */
1451                 tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
1452                 if (netif_rx_schedule_prep(dev, &lp->napi))
1453                         __netif_rx_schedule(dev, &lp->napi);
1454                 else {
1455                         printk(KERN_ERR "%s: interrupt taken in poll\n",
1456                                dev->name);
1457                         BUG();
1458                 }
1459                 (void)tc_readl(&tr->Int_Src);   /* flush */
1460                 return IRQ_HANDLED;
1461         }
1462         return IRQ_NONE;
1463 #else
1464         struct tc35815_local *lp = dev->priv;
1465         int handled;
1466         u32 status;
1467
1468         spin_lock(&lp->lock);
1469         status = tc_readl(&tr->Int_Src);
1470         tc_writel(status, &tr->Int_Src);        /* write to clear */
1471         handled = tc35815_do_interrupt(dev, status);
1472         (void)tc_readl(&tr->Int_Src);   /* flush */
1473         spin_unlock(&lp->lock);
1474         return IRQ_RETVAL(handled >= 0);
1475 #endif /* TC35815_NAPI */
1476 }
1477
1478 #ifdef CONFIG_NET_POLL_CONTROLLER
1479 static void tc35815_poll_controller(struct net_device *dev)
1480 {
1481         disable_irq(dev->irq);
1482         tc35815_interrupt(dev->irq, dev);
1483         enable_irq(dev->irq);
1484 }
1485 #endif
1486
1487 /* We have a good packet(s), get it/them out of the buffers. */
1488 #ifdef TC35815_NAPI
1489 static int
1490 tc35815_rx(struct net_device *dev, int limit)
1491 #else
1492 static void
1493 tc35815_rx(struct net_device *dev)
1494 #endif
1495 {
1496         struct tc35815_local *lp = dev->priv;
1497         unsigned int fdctl;
1498         int i;
1499         int buf_free_count = 0;
1500         int fd_free_count = 0;
1501 #ifdef TC35815_NAPI
1502         int received = 0;
1503 #endif
1504
1505         while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
1506                 int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
1507                 int pkt_len = fdctl & FD_FDLength_MASK;
1508                 int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1509 #ifdef DEBUG
1510                 struct RxFD *next_rfd;
1511 #endif
1512 #if (RX_CTL_CMD & Rx_StripCRC) == 0
1513                 pkt_len -= 4;
1514 #endif
1515
1516                 if (netif_msg_rx_status(lp))
1517                         dump_rxfd(lp->rfd_cur);
1518                 if (status & Rx_Good) {
1519                         struct sk_buff *skb;
1520                         unsigned char *data;
1521                         int cur_bd;
1522 #ifdef TC35815_USE_PACKEDBUFFER
1523                         int offset;
1524 #endif
1525
1526 #ifdef TC35815_NAPI
1527                         if (--limit < 0)
1528                                 break;
1529 #endif
1530 #ifdef TC35815_USE_PACKEDBUFFER
1531                         BUG_ON(bd_count > 2);
1532                         skb = dev_alloc_skb(pkt_len + 2); /* +2: for reserve */
1533                         if (skb == NULL) {
1534                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
1535                                        dev->name);
1536                                 lp->stats.rx_dropped++;
1537                                 break;
1538                         }
1539                         skb_reserve(skb, 2);   /* 16 bit alignment */
1540
1541                         data = skb_put(skb, pkt_len);
1542
1543                         /* copy from receive buffer */
1544                         cur_bd = 0;
1545                         offset = 0;
1546                         while (offset < pkt_len && cur_bd < bd_count) {
1547                                 int len = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BDCtl) &
1548                                         BD_BuffLength_MASK;
1549                                 dma_addr_t dma = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BuffData);
1550                                 void *rxbuf = rxbuf_bus_to_virt(lp, dma);
1551                                 if (offset + len > pkt_len)
1552                                         len = pkt_len - offset;
1553 #ifdef TC35815_DMA_SYNC_ONDEMAND
1554                                 pci_dma_sync_single_for_cpu(lp->pci_dev,
1555                                                             dma, len,
1556                                                             PCI_DMA_FROMDEVICE);
1557 #endif
1558                                 memcpy(data + offset, rxbuf, len);
1559 #ifdef TC35815_DMA_SYNC_ONDEMAND
1560                                 pci_dma_sync_single_for_device(lp->pci_dev,
1561                                                                dma, len,
1562                                                                PCI_DMA_FROMDEVICE);
1563 #endif
1564                                 offset += len;
1565                                 cur_bd++;
1566                         }
1567 #else /* TC35815_USE_PACKEDBUFFER */
1568                         BUG_ON(bd_count > 1);
1569                         cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
1570                                   & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1571 #ifdef DEBUG
1572                         if (cur_bd >= RX_BUF_NUM) {
1573                                 printk("%s: invalid BDID.\n", dev->name);
1574                                 panic_queues(dev);
1575                         }
1576                         BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
1577                                (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
1578                         if (!lp->rx_skbs[cur_bd].skb) {
1579                                 printk("%s: NULL skb.\n", dev->name);
1580                                 panic_queues(dev);
1581                         }
1582 #else
1583                         BUG_ON(cur_bd >= RX_BUF_NUM);
1584 #endif
1585                         skb = lp->rx_skbs[cur_bd].skb;
1586                         prefetch(skb->data);
1587                         lp->rx_skbs[cur_bd].skb = NULL;
1588                         lp->fbl_count--;
1589                         pci_unmap_single(lp->pci_dev,
1590                                          lp->rx_skbs[cur_bd].skb_dma,
1591                                          RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1592                         if (!HAVE_DMA_RXALIGN(lp))
1593                                 memmove(skb->data, skb->data - 2, pkt_len);
1594                         data = skb_put(skb, pkt_len);
1595 #endif /* TC35815_USE_PACKEDBUFFER */
1596                         if (netif_msg_pktdata(lp))
1597                                 print_eth(data);
1598                         skb->protocol = eth_type_trans(skb, dev);
1599 #ifdef TC35815_NAPI
1600                         netif_receive_skb(skb);
1601                         received++;
1602 #else
1603                         netif_rx(skb);
1604 #endif
1605                         dev->last_rx = jiffies;
1606                         lp->stats.rx_packets++;
1607                         lp->stats.rx_bytes += pkt_len;
1608                 } else {
1609                         lp->stats.rx_errors++;
1610                         printk(KERN_DEBUG "%s: Rx error (status %x)\n",
1611                                dev->name, status & Rx_Stat_Mask);
1612                         /* WORKAROUND: LongErr and CRCErr means Overflow. */
1613                         if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
1614                                 status &= ~(Rx_LongErr|Rx_CRCErr);
1615                                 status |= Rx_Over;
1616                         }
1617                         if (status & Rx_LongErr) lp->stats.rx_length_errors++;
1618                         if (status & Rx_Over) lp->stats.rx_fifo_errors++;
1619                         if (status & Rx_CRCErr) lp->stats.rx_crc_errors++;
1620                         if (status & Rx_Align) lp->stats.rx_frame_errors++;
1621                 }
1622
1623                 if (bd_count > 0) {
1624                         /* put Free Buffer back to controller */
1625                         int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
1626                         unsigned char id =
1627                                 (bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1628 #ifdef DEBUG
1629                         if (id >= RX_BUF_NUM) {
1630                                 printk("%s: invalid BDID.\n", dev->name);
1631                                 panic_queues(dev);
1632                         }
1633 #else
1634                         BUG_ON(id >= RX_BUF_NUM);
1635 #endif
1636                         /* free old buffers */
1637 #ifdef TC35815_USE_PACKEDBUFFER
1638                         while (lp->fbl_curid != id)
1639 #else
1640                         while (lp->fbl_count < RX_BUF_NUM)
1641 #endif
1642                         {
1643 #ifdef TC35815_USE_PACKEDBUFFER
1644                                 unsigned char curid = lp->fbl_curid;
1645 #else
1646                                 unsigned char curid =
1647                                         (id + 1 + lp->fbl_count) % RX_BUF_NUM;
1648 #endif
1649                                 struct BDesc *bd = &lp->fbl_ptr->bd[curid];
1650 #ifdef DEBUG
1651                                 bdctl = le32_to_cpu(bd->BDCtl);
1652                                 if (bdctl & BD_CownsBD) {
1653                                         printk("%s: Freeing invalid BD.\n",
1654                                                dev->name);
1655                                         panic_queues(dev);
1656                                 }
1657 #endif
1658                                 /* pass BD to controler */
1659 #ifndef TC35815_USE_PACKEDBUFFER
1660                                 if (!lp->rx_skbs[curid].skb) {
1661                                         lp->rx_skbs[curid].skb =
1662                                                 alloc_rxbuf_skb(dev,
1663                                                                 lp->pci_dev,
1664                                                                 &lp->rx_skbs[curid].skb_dma);
1665                                         if (!lp->rx_skbs[curid].skb)
1666                                                 break; /* try on next reception */
1667                                         bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
1668                                 }
1669 #endif /* TC35815_USE_PACKEDBUFFER */
1670                                 /* Note: BDLength was modified by chip. */
1671                                 bd->BDCtl = cpu_to_le32(BD_CownsBD |
1672                                                         (curid << BD_RxBDID_SHIFT) |
1673                                                         RX_BUF_SIZE);
1674 #ifdef TC35815_USE_PACKEDBUFFER
1675                                 lp->fbl_curid = (curid + 1) % RX_BUF_NUM;
1676                                 if (netif_msg_rx_status(lp)) {
1677                                         printk("%s: Entering new FBD %d\n",
1678                                                dev->name, lp->fbl_curid);
1679                                         dump_frfd(lp->fbl_ptr);
1680                                 }
1681 #else
1682                                 lp->fbl_count++;
1683 #endif
1684                                 buf_free_count++;
1685                         }
1686                 }
1687
1688                 /* put RxFD back to controller */
1689 #ifdef DEBUG
1690                 next_rfd = fd_bus_to_virt(lp,
1691                                           le32_to_cpu(lp->rfd_cur->fd.FDNext));
1692                 if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
1693                         printk("%s: RxFD FDNext invalid.\n", dev->name);
1694                         panic_queues(dev);
1695                 }
1696 #endif
1697                 for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
1698                         /* pass FD to controler */
1699 #ifdef DEBUG
1700                         lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
1701 #else
1702                         lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
1703 #endif
1704                         lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
1705                         lp->rfd_cur++;
1706                         fd_free_count++;
1707                 }
1708                 if (lp->rfd_cur > lp->rfd_limit)
1709                         lp->rfd_cur = lp->rfd_base;
1710 #ifdef DEBUG
1711                 if (lp->rfd_cur != next_rfd)
1712                         printk("rfd_cur = %p, next_rfd %p\n",
1713                                lp->rfd_cur, next_rfd);
1714 #endif
1715         }
1716
1717         /* re-enable BL/FDA Exhaust interrupts. */
1718         if (fd_free_count) {
1719                 struct tc35815_regs __iomem *tr =
1720                         (struct tc35815_regs __iomem *)dev->base_addr;
1721                 u32 en, en_old = tc_readl(&tr->Int_En);
1722                 en = en_old | Int_FDAExEn;
1723                 if (buf_free_count)
1724                         en |= Int_BLExEn;
1725                 if (en != en_old)
1726                         tc_writel(en, &tr->Int_En);
1727         }
1728 #ifdef TC35815_NAPI
1729         return received;
1730 #endif
1731 }
1732
1733 #ifdef TC35815_NAPI
1734 static int tc35815_poll(struct napi_struct *napi, int budget)
1735 {
1736         struct tc35815_local *lp = container_of(napi, struct tc35815_local, napi);
1737         struct net_device *dev = lp->dev;
1738         struct tc35815_regs __iomem *tr =
1739                 (struct tc35815_regs __iomem *)dev->base_addr;
1740         int received = 0, handled;
1741         u32 status;
1742
1743         spin_lock(&lp->lock);
1744         status = tc_readl(&tr->Int_Src);
1745         do {
1746                 tc_writel(status, &tr->Int_Src);        /* write to clear */
1747
1748                 handled = tc35815_do_interrupt(dev, status, limit);
1749                 if (handled >= 0) {
1750                         received += handled;
1751                         if (received >= budget)
1752                                 break;
1753                 }
1754                 status = tc_readl(&tr->Int_Src);
1755         } while (status);
1756         spin_unlock(&lp->lock);
1757
1758         if (received < budget) {
1759                 netif_rx_complete(dev, napi);
1760                 /* enable interrupts */
1761                 tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
1762         }
1763         return received;
1764 }
1765 #endif
1766
1767 #ifdef NO_CHECK_CARRIER
1768 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1769 #else
1770 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1771 #endif
1772
1773 static void
1774 tc35815_check_tx_stat(struct net_device *dev, int status)
1775 {
1776         struct tc35815_local *lp = dev->priv;
1777         const char *msg = NULL;
1778
1779         /* count collisions */
1780         if (status & Tx_ExColl)
1781                 lp->stats.collisions += 16;
1782         if (status & Tx_TxColl_MASK)
1783                 lp->stats.collisions += status & Tx_TxColl_MASK;
1784
1785 #ifndef NO_CHECK_CARRIER
1786         /* TX4939 does not have NCarr */
1787         if (lp->boardtype == TC35815_TX4939)
1788                 status &= ~Tx_NCarr;
1789 #ifdef WORKAROUND_LOSTCAR
1790         /* WORKAROUND: ignore LostCrS in full duplex operation */
1791         if ((lp->timer_state != asleep && lp->timer_state != lcheck)
1792             || lp->fullduplex)
1793                 status &= ~Tx_NCarr;
1794 #endif
1795 #endif
1796
1797         if (!(status & TX_STA_ERR)) {
1798                 /* no error. */
1799                 lp->stats.tx_packets++;
1800                 return;
1801         }
1802
1803         lp->stats.tx_errors++;
1804         if (status & Tx_ExColl) {
1805                 lp->stats.tx_aborted_errors++;
1806                 msg = "Excessive Collision.";
1807         }
1808         if (status & Tx_Under) {
1809                 lp->stats.tx_fifo_errors++;
1810                 msg = "Tx FIFO Underrun.";
1811                 if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
1812                         lp->lstats.tx_underrun++;
1813                         if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
1814                                 struct tc35815_regs __iomem *tr =
1815                                         (struct tc35815_regs __iomem *)dev->base_addr;
1816                                 tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
1817                                 msg = "Tx FIFO Underrun.Change Tx threshold to max.";
1818                         }
1819                 }
1820         }
1821         if (status & Tx_Defer) {
1822                 lp->stats.tx_fifo_errors++;
1823                 msg = "Excessive Deferral.";
1824         }
1825 #ifndef NO_CHECK_CARRIER
1826         if (status & Tx_NCarr) {
1827                 lp->stats.tx_carrier_errors++;
1828                 msg = "Lost Carrier Sense.";
1829         }
1830 #endif
1831         if (status & Tx_LateColl) {
1832                 lp->stats.tx_aborted_errors++;
1833                 msg = "Late Collision.";
1834         }
1835         if (status & Tx_TxPar) {
1836                 lp->stats.tx_fifo_errors++;
1837                 msg = "Transmit Parity Error.";
1838         }
1839         if (status & Tx_SQErr) {
1840                 lp->stats.tx_heartbeat_errors++;
1841                 msg = "Signal Quality Error.";
1842         }
1843         if (msg && netif_msg_tx_err(lp))
1844                 printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
1845 }
1846
1847 /* This handles TX complete events posted by the device
1848  * via interrupts.
1849  */
1850 static void
1851 tc35815_txdone(struct net_device *dev)
1852 {
1853         struct tc35815_local *lp = dev->priv;
1854         struct TxFD *txfd;
1855         unsigned int fdctl;
1856
1857         txfd = &lp->tfd_base[lp->tfd_end];
1858         while (lp->tfd_start != lp->tfd_end &&
1859                !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
1860                 int status = le32_to_cpu(txfd->fd.FDStat);
1861                 struct sk_buff *skb;
1862                 unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
1863                 u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
1864
1865                 if (netif_msg_tx_done(lp)) {
1866                         printk("%s: complete TxFD.\n", dev->name);
1867                         dump_txfd(txfd);
1868                 }
1869                 tc35815_check_tx_stat(dev, status);
1870
1871                 skb = fdsystem != 0xffffffff ?
1872                         lp->tx_skbs[fdsystem].skb : NULL;
1873 #ifdef DEBUG
1874                 if (lp->tx_skbs[lp->tfd_end].skb != skb) {
1875                         printk("%s: tx_skbs mismatch.\n", dev->name);
1876                         panic_queues(dev);
1877                 }
1878 #else
1879                 BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
1880 #endif
1881                 if (skb) {
1882                         lp->stats.tx_bytes += skb->len;
1883                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
1884                         lp->tx_skbs[lp->tfd_end].skb = NULL;
1885                         lp->tx_skbs[lp->tfd_end].skb_dma = 0;
1886 #ifdef TC35815_NAPI
1887                         dev_kfree_skb_any(skb);
1888 #else
1889                         dev_kfree_skb_irq(skb);
1890 #endif
1891                 }
1892                 txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
1893
1894                 lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
1895                 txfd = &lp->tfd_base[lp->tfd_end];
1896 #ifdef DEBUG
1897                 if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
1898                         printk("%s: TxFD FDNext invalid.\n", dev->name);
1899                         panic_queues(dev);
1900                 }
1901 #endif
1902                 if (fdnext & FD_Next_EOL) {
1903                         /* DMA Transmitter has been stopping... */
1904                         if (lp->tfd_end != lp->tfd_start) {
1905                                 struct tc35815_regs __iomem *tr =
1906                                         (struct tc35815_regs __iomem *)dev->base_addr;
1907                                 int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
1908                                 struct TxFD* txhead = &lp->tfd_base[head];
1909                                 int qlen = (lp->tfd_start + TX_FD_NUM
1910                                             - lp->tfd_end) % TX_FD_NUM;
1911
1912 #ifdef DEBUG
1913                                 if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
1914                                         printk("%s: TxFD FDCtl invalid.\n", dev->name);
1915                                         panic_queues(dev);
1916                                 }
1917 #endif
1918                                 /* log max queue length */
1919                                 if (lp->lstats.max_tx_qlen < qlen)
1920                                         lp->lstats.max_tx_qlen = qlen;
1921
1922
1923                                 /* start DMA Transmitter again */
1924                                 txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1925 #ifdef GATHER_TXINT
1926                                 txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1927 #endif
1928                                 if (netif_msg_tx_queued(lp)) {
1929                                         printk("%s: start TxFD on queue.\n",
1930                                                dev->name);
1931                                         dump_txfd(txfd);
1932                                 }
1933                                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1934                         }
1935                         break;
1936                 }
1937         }
1938
1939         /* If we had stopped the queue due to a "tx full"
1940          * condition, and space has now been made available,
1941          * wake up the queue.
1942          */
1943         if (netif_queue_stopped(dev) && ! tc35815_tx_full(dev))
1944                 netif_wake_queue(dev);
1945 }
1946
1947 /* The inverse routine to tc35815_open(). */
1948 static int
1949 tc35815_close(struct net_device *dev)
1950 {
1951         struct tc35815_local *lp = dev->priv;
1952
1953         netif_stop_queue(dev);
1954 #ifdef TC35815_NAPI
1955         napi_disable(&lp->napi);
1956 #endif
1957
1958         /* Flush the Tx and disable Rx here. */
1959
1960         del_timer(&lp->timer);          /* Kill if running      */
1961         tc35815_chip_reset(dev);
1962         free_irq(dev->irq, dev);
1963
1964         tc35815_free_queues(dev);
1965
1966         return 0;
1967
1968 }
1969
1970 /*
1971  * Get the current statistics.
1972  * This may be called with the card open or closed.
1973  */
1974 static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
1975 {
1976         struct tc35815_local *lp = dev->priv;
1977         struct tc35815_regs __iomem *tr =
1978                 (struct tc35815_regs __iomem *)dev->base_addr;
1979         if (netif_running(dev)) {
1980                 /* Update the statistics from the device registers. */
1981                 lp->stats.rx_missed_errors = tc_readl(&tr->Miss_Cnt);
1982         }
1983
1984         return &lp->stats;
1985 }
1986
1987 static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
1988 {
1989         struct tc35815_local *lp = dev->priv;
1990         struct tc35815_regs __iomem *tr =
1991                 (struct tc35815_regs __iomem *)dev->base_addr;
1992         int cam_index = index * 6;
1993         u32 cam_data;
1994         u32 saved_addr;
1995         saved_addr = tc_readl(&tr->CAM_Adr);
1996
1997         if (netif_msg_hw(lp)) {
1998                 int i;
1999                 printk(KERN_DEBUG "%s: CAM %d:", dev->name, index);
2000                 for (i = 0; i < 6; i++)
2001                         printk(" %02x", addr[i]);
2002                 printk("\n");
2003         }
2004         if (index & 1) {
2005                 /* read modify write */
2006                 tc_writel(cam_index - 2, &tr->CAM_Adr);
2007                 cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
2008                 cam_data |= addr[0] << 8 | addr[1];
2009                 tc_writel(cam_data, &tr->CAM_Data);
2010                 /* write whole word */
2011                 tc_writel(cam_index + 2, &tr->CAM_Adr);
2012                 cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
2013                 tc_writel(cam_data, &tr->CAM_Data);
2014         } else {
2015                 /* write whole word */
2016                 tc_writel(cam_index, &tr->CAM_Adr);
2017                 cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
2018                 tc_writel(cam_data, &tr->CAM_Data);
2019                 /* read modify write */
2020                 tc_writel(cam_index + 4, &tr->CAM_Adr);
2021                 cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
2022                 cam_data |= addr[4] << 24 | (addr[5] << 16);
2023                 tc_writel(cam_data, &tr->CAM_Data);
2024         }
2025
2026         tc_writel(saved_addr, &tr->CAM_Adr);
2027 }
2028
2029
2030 /*
2031  * Set or clear the multicast filter for this adaptor.
2032  * num_addrs == -1      Promiscuous mode, receive all packets
2033  * num_addrs == 0       Normal mode, clear multicast list
2034  * num_addrs > 0        Multicast mode, receive normal and MC packets,
2035  *                      and do best-effort filtering.
2036  */
2037 static void
2038 tc35815_set_multicast_list(struct net_device *dev)
2039 {
2040         struct tc35815_regs __iomem *tr =
2041                 (struct tc35815_regs __iomem *)dev->base_addr;
2042
2043         if (dev->flags&IFF_PROMISC)
2044         {
2045 #ifdef WORKAROUND_100HALF_PROMISC
2046                 /* With some (all?) 100MHalf HUB, controller will hang
2047                  * if we enabled promiscuous mode before linkup... */
2048                 struct tc35815_local *lp = dev->priv;
2049                 int pid = lp->phy_addr;
2050                 if (!(tc_mdio_read(dev, pid, MII_BMSR) & BMSR_LSTATUS))
2051                         return;
2052 #endif
2053                 /* Enable promiscuous mode */
2054                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
2055         }
2056         else if((dev->flags&IFF_ALLMULTI) || dev->mc_count > CAM_ENTRY_MAX - 3)
2057         {
2058                 /* CAM 0, 1, 20 are reserved. */
2059                 /* Disable promiscuous mode, use normal mode. */
2060                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
2061         }
2062         else if(dev->mc_count)
2063         {
2064                 struct dev_mc_list* cur_addr = dev->mc_list;
2065                 int i;
2066                 int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
2067
2068                 tc_writel(0, &tr->CAM_Ctl);
2069                 /* Walk the address list, and load the filter */
2070                 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
2071                         if (!cur_addr)
2072                                 break;
2073                         /* entry 0,1 is reserved. */
2074                         tc35815_set_cam_entry(dev, i + 2, cur_addr->dmi_addr);
2075                         ena_bits |= CAM_Ena_Bit(i + 2);
2076                 }
2077                 tc_writel(ena_bits, &tr->CAM_Ena);
2078                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2079         }
2080         else {
2081                 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2082                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2083         }
2084 }
2085
2086 static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2087 {
2088         struct tc35815_local *lp = dev->priv;
2089         strcpy(info->driver, MODNAME);
2090         strcpy(info->version, DRV_VERSION);
2091         strcpy(info->bus_info, pci_name(lp->pci_dev));
2092 }
2093
2094 static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2095 {
2096         struct tc35815_local *lp = dev->priv;
2097         spin_lock_irq(&lp->lock);
2098         mii_ethtool_gset(&lp->mii, cmd);
2099         spin_unlock_irq(&lp->lock);
2100         return 0;
2101 }
2102
2103 static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2104 {
2105         struct tc35815_local *lp = dev->priv;
2106         int rc;
2107 #if 1   /* use our negotiation method... */
2108         /* Verify the settings we care about. */
2109         if (cmd->autoneg != AUTONEG_ENABLE &&
2110             cmd->autoneg != AUTONEG_DISABLE)
2111                 return -EINVAL;
2112         if (cmd->autoneg == AUTONEG_DISABLE &&
2113             ((cmd->speed != SPEED_100 &&
2114               cmd->speed != SPEED_10) ||
2115              (cmd->duplex != DUPLEX_HALF &&
2116               cmd->duplex != DUPLEX_FULL)))
2117                 return -EINVAL;
2118
2119         /* Ok, do it to it. */
2120         spin_lock_irq(&lp->lock);
2121         del_timer(&lp->timer);
2122         tc35815_start_auto_negotiation(dev, cmd);
2123         spin_unlock_irq(&lp->lock);
2124         rc = 0;
2125 #else
2126         spin_lock_irq(&lp->lock);
2127         rc = mii_ethtool_sset(&lp->mii, cmd);
2128         spin_unlock_irq(&lp->lock);
2129 #endif
2130         return rc;
2131 }
2132
2133 static int tc35815_nway_reset(struct net_device *dev)
2134 {
2135         struct tc35815_local *lp = dev->priv;
2136         int rc;
2137         spin_lock_irq(&lp->lock);
2138         rc = mii_nway_restart(&lp->mii);
2139         spin_unlock_irq(&lp->lock);
2140         return rc;
2141 }
2142
2143 static u32 tc35815_get_link(struct net_device *dev)
2144 {
2145         struct tc35815_local *lp = dev->priv;
2146         int rc;
2147         spin_lock_irq(&lp->lock);
2148         rc = mii_link_ok(&lp->mii);
2149         spin_unlock_irq(&lp->lock);
2150         return rc;
2151 }
2152
2153 static u32 tc35815_get_msglevel(struct net_device *dev)
2154 {
2155         struct tc35815_local *lp = dev->priv;
2156         return lp->msg_enable;
2157 }
2158
2159 static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
2160 {
2161         struct tc35815_local *lp = dev->priv;
2162         lp->msg_enable = datum;
2163 }
2164
2165 static int tc35815_get_sset_count(struct net_device *dev, int sset)
2166 {
2167         struct tc35815_local *lp = dev->priv;
2168
2169         switch (sset) {
2170         case ETH_SS_STATS:
2171                 return sizeof(lp->lstats) / sizeof(int);
2172         default:
2173                 return -EOPNOTSUPP;
2174         }
2175 }
2176
2177 static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2178 {
2179         struct tc35815_local *lp = dev->priv;
2180         data[0] = lp->lstats.max_tx_qlen;
2181         data[1] = lp->lstats.tx_ints;
2182         data[2] = lp->lstats.rx_ints;
2183         data[3] = lp->lstats.tx_underrun;
2184 }
2185
2186 static struct {
2187         const char str[ETH_GSTRING_LEN];
2188 } ethtool_stats_keys[] = {
2189         { "max_tx_qlen" },
2190         { "tx_ints" },
2191         { "rx_ints" },
2192         { "tx_underrun" },
2193 };
2194
2195 static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2196 {
2197         memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2198 }
2199
2200 static const struct ethtool_ops tc35815_ethtool_ops = {
2201         .get_drvinfo            = tc35815_get_drvinfo,
2202         .get_settings           = tc35815_get_settings,
2203         .set_settings           = tc35815_set_settings,
2204         .nway_reset             = tc35815_nway_reset,
2205         .get_link               = tc35815_get_link,
2206         .get_msglevel           = tc35815_get_msglevel,
2207         .set_msglevel           = tc35815_set_msglevel,
2208         .get_strings            = tc35815_get_strings,
2209         .get_sset_count         = tc35815_get_sset_count,
2210         .get_ethtool_stats      = tc35815_get_ethtool_stats,
2211 };
2212
2213 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2214 {
2215         struct tc35815_local *lp = dev->priv;
2216         int rc;
2217
2218         if (!netif_running(dev))
2219                 return -EINVAL;
2220
2221         spin_lock_irq(&lp->lock);
2222         rc = generic_mii_ioctl(&lp->mii, if_mii(rq), cmd, NULL);
2223         spin_unlock_irq(&lp->lock);
2224
2225         return rc;
2226 }
2227
2228 static int tc_mdio_read(struct net_device *dev, int phy_id, int location)
2229 {
2230         struct tc35815_regs __iomem *tr =
2231                 (struct tc35815_regs __iomem *)dev->base_addr;
2232         u32 data;
2233         tc_writel(MD_CA_Busy | (phy_id << 5) | location, &tr->MD_CA);
2234         while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
2235                 ;
2236         data = tc_readl(&tr->MD_Data);
2237         return data & 0xffff;
2238 }
2239
2240 static void tc_mdio_write(struct net_device *dev, int phy_id, int location,
2241                           int val)
2242 {
2243         struct tc35815_regs __iomem *tr =
2244                 (struct tc35815_regs __iomem *)dev->base_addr;
2245         tc_writel(val, &tr->MD_Data);
2246         tc_writel(MD_CA_Busy | MD_CA_Wr | (phy_id << 5) | location, &tr->MD_CA);
2247         while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
2248                 ;
2249 }
2250
2251 /* Auto negotiation.  The scheme is very simple.  We have a timer routine
2252  * that keeps watching the auto negotiation process as it progresses.
2253  * The DP83840 is first told to start doing it's thing, we set up the time
2254  * and place the timer state machine in it's initial state.
2255  *
2256  * Here the timer peeks at the DP83840 status registers at each click to see
2257  * if the auto negotiation has completed, we assume here that the DP83840 PHY
2258  * will time out at some point and just tell us what (didn't) happen.  For
2259  * complete coverage we only allow so many of the ticks at this level to run,
2260  * when this has expired we print a warning message and try another strategy.
2261  * This "other" strategy is to force the interface into various speed/duplex
2262  * configurations and we stop when we see a link-up condition before the
2263  * maximum number of "peek" ticks have occurred.
2264  *
2265  * Once a valid link status has been detected we configure the BigMAC and
2266  * the rest of the Happy Meal to speak the most efficient protocol we could
2267  * get a clean link for.  The priority for link configurations, highest first
2268  * is:
2269  *                 100 Base-T Full Duplex
2270  *                 100 Base-T Half Duplex
2271  *                 10 Base-T Full Duplex
2272  *                 10 Base-T Half Duplex
2273  *
2274  * We start a new timer now, after a successful auto negotiation status has
2275  * been detected.  This timer just waits for the link-up bit to get set in
2276  * the BMCR of the DP83840.  When this occurs we print a kernel log message
2277  * describing the link type in use and the fact that it is up.
2278  *
2279  * If a fatal error of some sort is signalled and detected in the interrupt
2280  * service routine, and the chip is reset, or the link is ifconfig'd down
2281  * and then back up, this entire process repeats itself all over again.
2282  */
2283 /* Note: Above comments are come from sunhme driver. */
2284
2285 static int tc35815_try_next_permutation(struct net_device *dev)
2286 {
2287         struct tc35815_local *lp = dev->priv;
2288         int pid = lp->phy_addr;
2289         unsigned short bmcr;
2290
2291         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2292
2293         /* Downgrade from full to half duplex.  Only possible via ethtool.  */
2294         if (bmcr & BMCR_FULLDPLX) {
2295                 bmcr &= ~BMCR_FULLDPLX;
2296                 printk(KERN_DEBUG "%s: try next permutation (BMCR %x)\n", dev->name, bmcr);
2297                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2298                 return 0;
2299         }
2300
2301         /* Downgrade from 100 to 10. */
2302         if (bmcr & BMCR_SPEED100) {
2303                 bmcr &= ~BMCR_SPEED100;
2304                 printk(KERN_DEBUG "%s: try next permutation (BMCR %x)\n", dev->name, bmcr);
2305                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2306                 return 0;
2307         }
2308
2309         /* We've tried everything. */
2310         return -1;
2311 }
2312
2313 static void
2314 tc35815_display_link_mode(struct net_device *dev)
2315 {
2316         struct tc35815_local *lp = dev->priv;
2317         int pid = lp->phy_addr;
2318         unsigned short lpa, bmcr;
2319         char *speed = "", *duplex = "";
2320
2321         lpa = tc_mdio_read(dev, pid, MII_LPA);
2322         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2323         if (options.speed ? (bmcr & BMCR_SPEED100) : (lpa & (LPA_100HALF | LPA_100FULL)))
2324                 speed = "100Mb/s";
2325         else
2326                 speed = "10Mb/s";
2327         if (options.duplex ? (bmcr & BMCR_FULLDPLX) : (lpa & (LPA_100FULL | LPA_10FULL)))
2328                 duplex = "Full Duplex";
2329         else
2330                 duplex = "Half Duplex";
2331
2332         if (netif_msg_link(lp))
2333                 printk(KERN_INFO "%s: Link is up at %s, %s.\n",
2334                        dev->name, speed, duplex);
2335         printk(KERN_DEBUG "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
2336                dev->name,
2337                bmcr, tc_mdio_read(dev, pid, MII_BMSR), lpa);
2338 }
2339
2340 static void tc35815_display_forced_link_mode(struct net_device *dev)
2341 {
2342         struct tc35815_local *lp = dev->priv;
2343         int pid = lp->phy_addr;
2344         unsigned short bmcr;
2345         char *speed = "", *duplex = "";
2346
2347         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2348         if (bmcr & BMCR_SPEED100)
2349                 speed = "100Mb/s";
2350         else
2351                 speed = "10Mb/s";
2352         if (bmcr & BMCR_FULLDPLX)
2353                 duplex = "Full Duplex.\n";
2354         else
2355                 duplex = "Half Duplex.\n";
2356
2357         if (netif_msg_link(lp))
2358                 printk(KERN_INFO "%s: Link has been forced up at %s, %s",
2359                        dev->name, speed, duplex);
2360 }
2361
2362 static void tc35815_set_link_modes(struct net_device *dev)
2363 {
2364         struct tc35815_local *lp = dev->priv;
2365         struct tc35815_regs __iomem *tr =
2366                 (struct tc35815_regs __iomem *)dev->base_addr;
2367         int pid = lp->phy_addr;
2368         unsigned short bmcr, lpa;
2369         int speed;
2370
2371         if (lp->timer_state == arbwait) {
2372                 lpa = tc_mdio_read(dev, pid, MII_LPA);
2373                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2374                 printk(KERN_DEBUG "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
2375                        dev->name,
2376                        bmcr, tc_mdio_read(dev, pid, MII_BMSR), lpa);
2377                 if (!(lpa & (LPA_10HALF | LPA_10FULL |
2378                              LPA_100HALF | LPA_100FULL))) {
2379                         /* fall back to 10HALF */
2380                         printk(KERN_INFO "%s: bad ability %04x - falling back to 10HD.\n",
2381                                dev->name, lpa);
2382                         lpa = LPA_10HALF;
2383                 }
2384                 if (options.duplex ? (bmcr & BMCR_FULLDPLX) : (lpa & (LPA_100FULL | LPA_10FULL)))
2385                         lp->fullduplex = 1;
2386                 else
2387                         lp->fullduplex = 0;
2388                 if (options.speed ? (bmcr & BMCR_SPEED100) : (lpa & (LPA_100HALF | LPA_100FULL)))
2389                         speed = 100;
2390                 else
2391                         speed = 10;
2392         } else {
2393                 /* Forcing a link mode. */
2394                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2395                 if (bmcr & BMCR_FULLDPLX)
2396                         lp->fullduplex = 1;
2397                 else
2398                         lp->fullduplex = 0;
2399                 if (bmcr & BMCR_SPEED100)
2400                         speed = 100;
2401                 else
2402                         speed = 10;
2403         }
2404
2405         tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_HaltReq, &tr->MAC_Ctl);
2406         if (lp->fullduplex) {
2407                 tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_FullDup, &tr->MAC_Ctl);
2408         } else {
2409                 tc_writel(tc_readl(&tr->MAC_Ctl) & ~MAC_FullDup, &tr->MAC_Ctl);
2410         }
2411         tc_writel(tc_readl(&tr->MAC_Ctl) & ~MAC_HaltReq, &tr->MAC_Ctl);
2412
2413         /* TX4939 PCFG.SPEEDn bit will be changed on NETDEV_CHANGE event. */
2414
2415 #ifndef NO_CHECK_CARRIER
2416         /* TX4939 does not have EnLCarr */
2417         if (lp->boardtype != TC35815_TX4939) {
2418 #ifdef WORKAROUND_LOSTCAR
2419                 /* WORKAROUND: enable LostCrS only if half duplex operation */
2420                 if (!lp->fullduplex && lp->boardtype != TC35815_TX4939)
2421                         tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr, &tr->Tx_Ctl);
2422 #endif
2423         }
2424 #endif
2425         lp->mii.full_duplex = lp->fullduplex;
2426 }
2427
2428 static void tc35815_timer(unsigned long data)
2429 {
2430         struct net_device *dev = (struct net_device *)data;
2431         struct tc35815_local *lp = dev->priv;
2432         int pid = lp->phy_addr;
2433         unsigned short bmsr, bmcr, lpa;
2434         int restart_timer = 0;
2435
2436         spin_lock_irq(&lp->lock);
2437
2438         lp->timer_ticks++;
2439         switch (lp->timer_state) {
2440         case arbwait:
2441                 /*
2442                  * Only allow for 5 ticks, thats 10 seconds and much too
2443                  * long to wait for arbitration to complete.
2444                  */
2445                 /* TC35815 need more times... */
2446                 if (lp->timer_ticks >= 10) {
2447                         /* Enter force mode. */
2448                         if (!options.doforce) {
2449                                 printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful,"
2450                                        " cable probblem?\n", dev->name);
2451                                 /* Try to restart the adaptor. */
2452                                 tc35815_restart(dev);
2453                                 goto out;
2454                         }
2455                         printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful,"
2456                                " trying force link mode\n", dev->name);
2457                         printk(KERN_DEBUG "%s: BMCR %x BMSR %x\n", dev->name,
2458                                tc_mdio_read(dev, pid, MII_BMCR),
2459                                tc_mdio_read(dev, pid, MII_BMSR));
2460                         bmcr = BMCR_SPEED100;
2461                         tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2462
2463                         /*
2464                          * OK, seems we need do disable the transceiver
2465                          * for the first tick to make sure we get an
2466                          * accurate link state at the second tick.
2467                          */
2468
2469                         lp->timer_state = ltrywait;
2470                         lp->timer_ticks = 0;
2471                         restart_timer = 1;
2472                 } else {
2473                         /* Anything interesting happen? */
2474                         bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2475                         if (bmsr & BMSR_ANEGCOMPLETE) {
2476                                 /* Just what we've been waiting for... */
2477                                 tc35815_set_link_modes(dev);
2478
2479                                 /*
2480                                  * Success, at least so far, advance our state
2481                                  * engine.
2482                                  */
2483                                 lp->timer_state = lupwait;
2484                                 restart_timer = 1;
2485                         } else {
2486                                 restart_timer = 1;
2487                         }
2488                 }
2489                 break;
2490
2491         case lupwait:
2492                 /*
2493                  * Auto negotiation was successful and we are awaiting a
2494                  * link up status.  I have decided to let this timer run
2495                  * forever until some sort of error is signalled, reporting
2496                  * a message to the user at 10 second intervals.
2497                  */
2498                 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2499                 if (bmsr & BMSR_LSTATUS) {
2500                         /*
2501                          * Wheee, it's up, display the link mode in use and put
2502                          * the timer to sleep.
2503                          */
2504                         tc35815_display_link_mode(dev);
2505                         netif_carrier_on(dev);
2506 #ifdef WORKAROUND_100HALF_PROMISC
2507                         /* delayed promiscuous enabling */
2508                         if (dev->flags & IFF_PROMISC)
2509                                 tc35815_set_multicast_list(dev);
2510 #endif
2511 #if 1
2512                         lp->saved_lpa = tc_mdio_read(dev, pid, MII_LPA);
2513                         lp->timer_state = lcheck;
2514                         restart_timer = 1;
2515 #else
2516                         lp->timer_state = asleep;
2517                         restart_timer = 0;
2518 #endif
2519                 } else {
2520                         if (lp->timer_ticks >= 10) {
2521                                 printk(KERN_NOTICE "%s: Auto negotiation successful, link still "
2522                                        "not completely up.\n", dev->name);
2523                                 lp->timer_ticks = 0;
2524                                 restart_timer = 1;
2525                         } else {
2526                                 restart_timer = 1;
2527                         }
2528                 }
2529                 break;
2530
2531         case ltrywait:
2532                 /*
2533                  * Making the timeout here too long can make it take
2534                  * annoyingly long to attempt all of the link mode
2535                  * permutations, but then again this is essentially
2536                  * error recovery code for the most part.
2537                  */
2538                 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2539                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2540                 if (lp->timer_ticks == 1) {
2541                         /*
2542                          * Re-enable transceiver, we'll re-enable the
2543                          * transceiver next tick, then check link state
2544                          * on the following tick.
2545                          */
2546                         restart_timer = 1;
2547                         break;
2548                 }
2549                 if (lp->timer_ticks == 2) {
2550                         restart_timer = 1;
2551                         break;
2552                 }
2553                 if (bmsr & BMSR_LSTATUS) {
2554                         /* Force mode selection success. */
2555                         tc35815_display_forced_link_mode(dev);
2556                         netif_carrier_on(dev);
2557                         tc35815_set_link_modes(dev);
2558 #ifdef WORKAROUND_100HALF_PROMISC
2559                         /* delayed promiscuous enabling */
2560                         if (dev->flags & IFF_PROMISC)
2561                                 tc35815_set_multicast_list(dev);
2562 #endif
2563 #if 1
2564                         lp->saved_lpa = tc_mdio_read(dev, pid, MII_LPA);
2565                         lp->timer_state = lcheck;
2566                         restart_timer = 1;
2567 #else
2568                         lp->timer_state = asleep;
2569                         restart_timer = 0;
2570 #endif
2571                 } else {
2572                         if (lp->timer_ticks >= 4) { /* 6 seconds or so... */
2573                                 int ret;
2574
2575                                 ret = tc35815_try_next_permutation(dev);
2576                                 if (ret == -1) {
2577                                         /*
2578                                          * Aieee, tried them all, reset the
2579                                          * chip and try all over again.
2580                                          */
2581                                         printk(KERN_NOTICE "%s: Link down, "
2582                                                "cable problem?\n",
2583                                                dev->name);
2584
2585                                         /* Try to restart the adaptor. */
2586                                         tc35815_restart(dev);
2587                                         goto out;
2588                                 }
2589                                 lp->timer_ticks = 0;
2590                                 restart_timer = 1;
2591                         } else {
2592                                 restart_timer = 1;
2593                         }
2594                 }
2595                 break;
2596
2597         case lcheck:
2598                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2599                 lpa = tc_mdio_read(dev, pid, MII_LPA);
2600                 if (bmcr & (BMCR_PDOWN | BMCR_ISOLATE | BMCR_RESET)) {
2601                         printk(KERN_ERR "%s: PHY down? (BMCR %x)\n", dev->name,
2602                                bmcr);
2603                 } else if ((lp->saved_lpa ^ lpa) &
2604                            (LPA_100FULL|LPA_100HALF|LPA_10FULL|LPA_10HALF)) {
2605                         printk(KERN_NOTICE "%s: link status changed"
2606                                " (BMCR %x LPA %x->%x)\n", dev->name,
2607                                bmcr, lp->saved_lpa, lpa);
2608                 } else {
2609                         /* go on */
2610                         restart_timer = 1;
2611                         break;
2612                 }
2613                 /* Try to restart the adaptor. */
2614                 tc35815_restart(dev);
2615                 goto out;
2616
2617         case asleep:
2618         default:
2619                 /* Can't happens.... */
2620                 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got "
2621                        "one anyways!\n", dev->name);
2622                 restart_timer = 0;
2623                 lp->timer_ticks = 0;
2624                 lp->timer_state = asleep; /* foo on you */
2625                 break;
2626         }
2627
2628         if (restart_timer) {
2629                 lp->timer.expires = jiffies + msecs_to_jiffies(1200);
2630                 add_timer(&lp->timer);
2631         }
2632 out:
2633         spin_unlock_irq(&lp->lock);
2634 }
2635
2636 static void tc35815_start_auto_negotiation(struct net_device *dev,
2637                                            struct ethtool_cmd *ep)
2638 {
2639         struct tc35815_local *lp = dev->priv;
2640         int pid = lp->phy_addr;
2641         unsigned short bmsr, bmcr, advertize;
2642         int timeout;
2643
2644         netif_carrier_off(dev);
2645         bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2646         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2647         advertize = tc_mdio_read(dev, pid, MII_ADVERTISE);
2648
2649         if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
2650                 if (options.speed || options.duplex) {
2651                         /* Advertise only specified configuration. */
2652                         advertize &= ~(ADVERTISE_10HALF |
2653                                        ADVERTISE_10FULL |
2654                                        ADVERTISE_100HALF |
2655                                        ADVERTISE_100FULL);
2656                         if (options.speed != 10) {
2657                                 if (options.duplex != 1)
2658                                         advertize |= ADVERTISE_100FULL;
2659                                 if (options.duplex != 2)
2660                                         advertize |= ADVERTISE_100HALF;
2661                         }
2662                         if (options.speed != 100) {
2663                                 if (options.duplex != 1)
2664                                         advertize |= ADVERTISE_10FULL;
2665                                 if (options.duplex != 2)
2666                                         advertize |= ADVERTISE_10HALF;
2667                         }
2668                         if (options.speed == 100)
2669                                 bmcr |= BMCR_SPEED100;
2670                         else if (options.speed == 10)
2671                                 bmcr &= ~BMCR_SPEED100;
2672                         if (options.duplex == 2)
2673                                 bmcr |= BMCR_FULLDPLX;
2674                         else if (options.duplex == 1)
2675                                 bmcr &= ~BMCR_FULLDPLX;
2676                 } else {
2677                         /* Advertise everything we can support. */
2678                         if (bmsr & BMSR_10HALF)
2679                                 advertize |= ADVERTISE_10HALF;
2680                         else
2681                                 advertize &= ~ADVERTISE_10HALF;
2682                         if (bmsr & BMSR_10FULL)
2683                                 advertize |= ADVERTISE_10FULL;
2684                         else
2685                                 advertize &= ~ADVERTISE_10FULL;
2686                         if (bmsr & BMSR_100HALF)
2687                                 advertize |= ADVERTISE_100HALF;
2688                         else
2689                                 advertize &= ~ADVERTISE_100HALF;
2690                         if (bmsr & BMSR_100FULL)
2691                                 advertize |= ADVERTISE_100FULL;
2692                         else
2693                                 advertize &= ~ADVERTISE_100FULL;
2694                 }
2695
2696                 tc_mdio_write(dev, pid, MII_ADVERTISE, advertize);
2697
2698                 /* Enable Auto-Negotiation, this is usually on already... */
2699                 bmcr |= BMCR_ANENABLE;
2700                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2701
2702                 /* Restart it to make sure it is going. */
2703                 bmcr |= BMCR_ANRESTART;
2704                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2705                 printk(KERN_DEBUG "%s: ADVERTISE %x BMCR %x\n", dev->name, advertize, bmcr);
2706
2707                 /* BMCR_ANRESTART self clears when the process has begun. */
2708                 timeout = 64;  /* More than enough. */
2709                 while (--timeout) {
2710                         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2711                         if (!(bmcr & BMCR_ANRESTART))
2712                                 break; /* got it. */
2713                         udelay(10);
2714                 }
2715                 if (!timeout) {
2716                         printk(KERN_ERR "%s: TC35815 would not start auto "
2717                                "negotiation BMCR=0x%04x\n",
2718                                dev->name, bmcr);
2719                         printk(KERN_NOTICE "%s: Performing force link "
2720                                "detection.\n", dev->name);
2721                         goto force_link;
2722                 } else {
2723                         printk(KERN_DEBUG "%s: auto negotiation started.\n", dev->name);
2724                         lp->timer_state = arbwait;
2725                 }
2726         } else {
2727 force_link:
2728                 /* Force the link up, trying first a particular mode.
2729                  * Either we are here at the request of ethtool or
2730                  * because the Happy Meal would not start to autoneg.
2731                  */
2732
2733                 /* Disable auto-negotiation in BMCR, enable the duplex and
2734                  * speed setting, init the timer state machine, and fire it off.
2735                  */
2736                 if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
2737                         bmcr = BMCR_SPEED100;
2738                 } else {
2739                         if (ep->speed == SPEED_100)
2740                                 bmcr = BMCR_SPEED100;
2741                         else
2742                                 bmcr = 0;
2743                         if (ep->duplex == DUPLEX_FULL)
2744                                 bmcr |= BMCR_FULLDPLX;
2745                 }
2746                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2747
2748                 /* OK, seems we need do disable the transceiver for the first
2749                  * tick to make sure we get an accurate link state at the
2750                  * second tick.
2751                  */
2752                 lp->timer_state = ltrywait;
2753         }
2754
2755         del_timer(&lp->timer);
2756         lp->timer_ticks = 0;
2757         lp->timer.expires = jiffies + msecs_to_jiffies(1200);
2758         add_timer(&lp->timer);
2759 }
2760
2761 static void tc35815_find_phy(struct net_device *dev)
2762 {
2763         struct tc35815_local *lp = dev->priv;
2764         int pid = lp->phy_addr;
2765         unsigned short id0;
2766
2767         /* find MII phy */
2768         for (pid = 31; pid >= 0; pid--) {
2769                 id0 = tc_mdio_read(dev, pid, MII_BMSR);
2770                 if (id0 != 0xffff && id0 != 0x0000 &&
2771                     (id0 & BMSR_RESV) != (0xffff & BMSR_RESV) /* paranoia? */
2772                         ) {
2773                         lp->phy_addr = pid;
2774                         break;
2775                 }
2776         }
2777         if (pid < 0) {
2778                 printk(KERN_ERR "%s: No MII Phy found.\n",
2779                        dev->name);
2780                 lp->phy_addr = pid = 0;
2781         }
2782
2783         lp->mii_id[0] = tc_mdio_read(dev, pid, MII_PHYSID1);
2784         lp->mii_id[1] = tc_mdio_read(dev, pid, MII_PHYSID2);
2785         if (netif_msg_hw(lp))
2786                 printk(KERN_INFO "%s: PHY(%02x) ID %04x %04x\n", dev->name,
2787                        pid, lp->mii_id[0], lp->mii_id[1]);
2788 }
2789
2790 static void tc35815_phy_chip_init(struct net_device *dev)
2791 {
2792         struct tc35815_local *lp = dev->priv;
2793         int pid = lp->phy_addr;
2794         unsigned short bmcr;
2795         struct ethtool_cmd ecmd, *ep;
2796
2797         /* dis-isolate if needed. */
2798         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2799         if (bmcr & BMCR_ISOLATE) {
2800                 int count = 32;
2801                 printk(KERN_DEBUG "%s: unisolating...", dev->name);
2802                 tc_mdio_write(dev, pid, MII_BMCR, bmcr & ~BMCR_ISOLATE);
2803                 while (--count) {
2804                         if (!(tc_mdio_read(dev, pid, MII_BMCR) & BMCR_ISOLATE))
2805                                 break;
2806                         udelay(20);
2807                 }
2808                 printk(" %s.\n", count ? "done" : "failed");
2809         }
2810
2811         if (options.speed && options.duplex) {
2812                 ecmd.autoneg = AUTONEG_DISABLE;
2813                 ecmd.speed = options.speed == 10 ? SPEED_10 : SPEED_100;
2814                 ecmd.duplex = options.duplex == 1 ? DUPLEX_HALF : DUPLEX_FULL;
2815                 ep = &ecmd;
2816         } else {
2817                 ep = NULL;
2818         }
2819         tc35815_start_auto_negotiation(dev, ep);
2820 }
2821
2822 static void tc35815_chip_reset(struct net_device *dev)
2823 {
2824         struct tc35815_regs __iomem *tr =
2825                 (struct tc35815_regs __iomem *)dev->base_addr;
2826         int i;
2827         /* reset the controller */
2828         tc_writel(MAC_Reset, &tr->MAC_Ctl);
2829         udelay(4); /* 3200ns */
2830         i = 0;
2831         while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
2832                 if (i++ > 100) {
2833                         printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
2834                         break;
2835                 }
2836                 mdelay(1);
2837         }
2838         tc_writel(0, &tr->MAC_Ctl);
2839
2840         /* initialize registers to default value */
2841         tc_writel(0, &tr->DMA_Ctl);
2842         tc_writel(0, &tr->TxThrsh);
2843         tc_writel(0, &tr->TxPollCtr);
2844         tc_writel(0, &tr->RxFragSize);
2845         tc_writel(0, &tr->Int_En);
2846         tc_writel(0, &tr->FDA_Bas);
2847         tc_writel(0, &tr->FDA_Lim);
2848         tc_writel(0xffffffff, &tr->Int_Src);    /* Write 1 to clear */
2849         tc_writel(0, &tr->CAM_Ctl);
2850         tc_writel(0, &tr->Tx_Ctl);
2851         tc_writel(0, &tr->Rx_Ctl);
2852         tc_writel(0, &tr->CAM_Ena);
2853         (void)tc_readl(&tr->Miss_Cnt);  /* Read to clear */
2854
2855         /* initialize internal SRAM */
2856         tc_writel(DMA_TestMode, &tr->DMA_Ctl);
2857         for (i = 0; i < 0x1000; i += 4) {
2858                 tc_writel(i, &tr->CAM_Adr);
2859                 tc_writel(0, &tr->CAM_Data);
2860         }
2861         tc_writel(0, &tr->DMA_Ctl);
2862 }
2863
2864 static void tc35815_chip_init(struct net_device *dev)
2865 {
2866         struct tc35815_local *lp = dev->priv;
2867         struct tc35815_regs __iomem *tr =
2868                 (struct tc35815_regs __iomem *)dev->base_addr;
2869         unsigned long txctl = TX_CTL_CMD;
2870
2871         tc35815_phy_chip_init(dev);
2872
2873         /* load station address to CAM */
2874         tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
2875
2876         /* Enable CAM (broadcast and unicast) */
2877         tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2878         tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2879
2880         /* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
2881         if (HAVE_DMA_RXALIGN(lp))
2882                 tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
2883         else
2884                 tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
2885 #ifdef TC35815_USE_PACKEDBUFFER
2886         tc_writel(RxFrag_EnPack | ETH_ZLEN, &tr->RxFragSize);   /* Packing */
2887 #else
2888         tc_writel(ETH_ZLEN, &tr->RxFragSize);
2889 #endif
2890         tc_writel(0, &tr->TxPollCtr);   /* Batch mode */
2891         tc_writel(TX_THRESHOLD, &tr->TxThrsh);
2892         tc_writel(INT_EN_CMD, &tr->Int_En);
2893
2894         /* set queues */
2895         tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
2896         tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
2897                   &tr->FDA_Lim);
2898         /*
2899          * Activation method:
2900          * First, enable the MAC Transmitter and the DMA Receive circuits.
2901          * Then enable the DMA Transmitter and the MAC Receive circuits.
2902          */
2903         tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr);      /* start DMA receiver */
2904         tc_writel(RX_CTL_CMD, &tr->Rx_Ctl);     /* start MAC receiver */
2905
2906         /* start MAC transmitter */
2907 #ifndef NO_CHECK_CARRIER
2908         /* TX4939 does not have EnLCarr */
2909         if (lp->boardtype == TC35815_TX4939)
2910                 txctl &= ~Tx_EnLCarr;
2911 #ifdef WORKAROUND_LOSTCAR
2912         /* WORKAROUND: ignore LostCrS in full duplex operation */
2913         if ((lp->timer_state != asleep && lp->timer_state != lcheck) ||
2914             lp->fullduplex)
2915                 txctl &= ~Tx_EnLCarr;
2916 #endif
2917 #endif /* !NO_CHECK_CARRIER */
2918 #ifdef GATHER_TXINT
2919         txctl &= ~Tx_EnComp;    /* disable global tx completion int. */
2920 #endif
2921         tc_writel(txctl, &tr->Tx_Ctl);
2922 }
2923
2924 #ifdef CONFIG_PM
2925 static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
2926 {
2927         struct net_device *dev = pci_get_drvdata(pdev);
2928         struct tc35815_local *lp = dev->priv;
2929         unsigned long flags;
2930
2931         pci_save_state(pdev);
2932         if (!netif_running(dev))
2933                 return 0;
2934         netif_device_detach(dev);
2935         spin_lock_irqsave(&lp->lock, flags);
2936         del_timer(&lp->timer);          /* Kill if running      */
2937         tc35815_chip_reset(dev);
2938         spin_unlock_irqrestore(&lp->lock, flags);
2939         pci_set_power_state(pdev, PCI_D3hot);
2940         return 0;
2941 }
2942
2943 static int tc35815_resume(struct pci_dev *pdev)
2944 {
2945         struct net_device *dev = pci_get_drvdata(pdev);
2946         struct tc35815_local *lp = dev->priv;
2947         unsigned long flags;
2948
2949         pci_restore_state(pdev);
2950         if (!netif_running(dev))
2951                 return 0;
2952         pci_set_power_state(pdev, PCI_D0);
2953         spin_lock_irqsave(&lp->lock, flags);
2954         tc35815_restart(dev);
2955         spin_unlock_irqrestore(&lp->lock, flags);
2956         netif_device_attach(dev);
2957         return 0;
2958 }
2959 #endif /* CONFIG_PM */
2960
2961 static struct pci_driver tc35815_pci_driver = {
2962         .name           = MODNAME,
2963         .id_table       = tc35815_pci_tbl,
2964         .probe          = tc35815_init_one,
2965         .remove         = __devexit_p(tc35815_remove_one),
2966 #ifdef CONFIG_PM
2967         .suspend        = tc35815_suspend,
2968         .resume         = tc35815_resume,
2969 #endif
2970 };
2971
2972 module_param_named(speed, options.speed, int, 0);
2973 MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
2974 module_param_named(duplex, options.duplex, int, 0);
2975 MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
2976 module_param_named(doforce, options.doforce, int, 0);
2977 MODULE_PARM_DESC(doforce, "try force link mode if auto-negotiation failed");
2978
2979 static int __init tc35815_init_module(void)
2980 {
2981         return pci_register_driver(&tc35815_pci_driver);
2982 }
2983
2984 static void __exit tc35815_cleanup_module(void)
2985 {
2986         pci_unregister_driver(&tc35815_pci_driver);
2987 }
2988
2989 module_init(tc35815_init_module);
2990 module_exit(tc35815_cleanup_module);
2991
2992 MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
2993 MODULE_LICENSE("GPL");