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   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     "1.35-NAPI"
  27 #else
  28 #define DRV_VERSION     "1.35"
  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 <asm/io.h>
  53 #include <asm/byteorder.h>
  54
  55 /* First, a few definitions that the brave might change. */
  56
  57 #define GATHER_TXINT    /* On-Demand Tx Interrupt */
  58 #define WORKAROUND_LOSTCAR
  59 #define WORKAROUND_100HALF_PROMISC
  60 /* #define TC35815_USE_PACKEDBUFFER */
  61
  62 typedef enum {
  63         TC35815CF = 0,
  64         TC35815_NWU,
  65         TC35815_TX4939,
  66 } board_t;
  67
  68 /* indexed by board_t, above */
  69 static const struct {
  70         const char *name;
  71 } board_info[] __devinitdata = {
  72         { "TOSHIBA TC35815CF 10/100BaseTX" },
  73         { "TOSHIBA TC35815 with Wake on LAN" },
  74         { "TOSHIBA TC35815/TX4939" },
  75 };
  76
  77 static const struct pci_device_id tc35815_pci_tbl[] = {
  78         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815CF), .driver_data = TC35815CF },
  79         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_NWU), .driver_data = TC35815_NWU },
  80         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939), .driver_data = TC35815_TX4939 },
  81         {0,}
  82 };
  83 MODULE_DEVICE_TABLE (pci, tc35815_pci_tbl);
  84
  85 /* see MODULE_PARM_DESC */
  86 static struct tc35815_options {
  87         int speed;
  88         int duplex;
  89         int doforce;
  90 } options;
  91
  92 /*
  93  * Registers
  94  */
  95 struct tc35815_regs {
  96         volatile __u32 DMA_Ctl;         /* 0x00 */
  97         volatile __u32 TxFrmPtr;
  98         volatile __u32 TxThrsh;
  99         volatile __u32 TxPollCtr;
 100         volatile __u32 BLFrmPtr;
 101         volatile __u32 RxFragSize;
 102         volatile __u32 Int_En;
 103         volatile __u32 FDA_Bas;
 104         volatile __u32 FDA_Lim;         /* 0x20 */
 105         volatile __u32 Int_Src;
 106         volatile __u32 unused0[2];
 107         volatile __u32 PauseCnt;
 108         volatile __u32 RemPauCnt;
 109         volatile __u32 TxCtlFrmStat;
 110         volatile __u32 unused1;
 111         volatile __u32 MAC_Ctl;         /* 0x40 */
 112         volatile __u32 CAM_Ctl;
 113         volatile __u32 Tx_Ctl;
 114         volatile __u32 Tx_Stat;
 115         volatile __u32 Rx_Ctl;
 116         volatile __u32 Rx_Stat;
 117         volatile __u32 MD_Data;
 118         volatile __u32 MD_CA;
 119         volatile __u32 CAM_Adr;         /* 0x60 */
 120         volatile __u32 CAM_Data;
 121         volatile __u32 CAM_Ena;
 122         volatile __u32 PROM_Ctl;
 123         volatile __u32 PROM_Data;
 124         volatile __u32 Algn_Cnt;
 125         volatile __u32 CRC_Cnt;
 126         volatile __u32 Miss_Cnt;
 127 };
 128
 129 /*
 130  * Bit assignments
 131  */
 132 /* DMA_Ctl bit asign ------------------------------------------------------- */
 133 #define DMA_RxAlign            0x00c00000 /* 1:Reception Alignment           */
 134 #define DMA_RxAlign_1          0x00400000
 135 #define DMA_RxAlign_2          0x00800000
 136 #define DMA_RxAlign_3          0x00c00000
 137 #define DMA_M66EnStat          0x00080000 /* 1:66MHz Enable State            */
 138 #define DMA_IntMask            0x00040000 /* 1:Interupt mask                 */
 139 #define DMA_SWIntReq           0x00020000 /* 1:Software Interrupt request    */
 140 #define DMA_TxWakeUp           0x00010000 /* 1:Transmit Wake Up              */
 141 #define DMA_RxBigE             0x00008000 /* 1:Receive Big Endian            */
 142 #define DMA_TxBigE             0x00004000 /* 1:Transmit Big Endian           */
 143 #define DMA_TestMode           0x00002000 /* 1:Test Mode                     */
 144 #define DMA_PowrMgmnt          0x00001000 /* 1:Power Management              */
 145 #define DMA_DmBurst_Mask       0x000001fc /* DMA Burst size                  */
 146
 147 /* RxFragSize bit asign ---------------------------------------------------- */
 148 #define RxFrag_EnPack          0x00008000 /* 1:Enable Packing                */
 149 #define RxFrag_MinFragMask     0x00000ffc /* Minimum Fragment                */
 150
 151 /* MAC_Ctl bit asign ------------------------------------------------------- */
 152 #define MAC_Link10             0x00008000 /* 1:Link Status 10Mbits           */
 153 #define MAC_EnMissRoll         0x00002000 /* 1:Enable Missed Roll            */
 154 #define MAC_MissRoll           0x00000400 /* 1:Missed Roll                   */
 155 #define MAC_Loop10             0x00000080 /* 1:Loop 10 Mbps                  */
 156 #define MAC_Conn_Auto          0x00000000 /*00:Connection mode (Automatic)   */
 157 #define MAC_Conn_10M           0x00000020 /*01:                (10Mbps endec)*/
 158 #define MAC_Conn_Mll           0x00000040 /*10:                (Mll clock)   */
 159 #define MAC_MacLoop            0x00000010 /* 1:MAC Loopback                  */
 160 #define MAC_FullDup            0x00000008 /* 1:Full Duplex 0:Half Duplex     */
 161 #define MAC_Reset              0x00000004 /* 1:Software Reset                */
 162 #define MAC_HaltImm            0x00000002 /* 1:Halt Immediate                */
 163 #define MAC_HaltReq            0x00000001 /* 1:Halt request                  */
 164
 165 /* PROM_Ctl bit asign ------------------------------------------------------ */
 166 #define PROM_Busy              0x00008000 /* 1:Busy (Start Operation)        */
 167 #define PROM_Read              0x00004000 /*10:Read operation                */
 168 #define PROM_Write             0x00002000 /*01:Write operation               */
 169 #define PROM_Erase             0x00006000 /*11:Erase operation               */
 170                                           /*00:Enable or Disable Writting,   */
 171                                           /*      as specified in PROM_Addr. */
 172 #define PROM_Addr_Ena          0x00000030 /*11xxxx:PROM Write enable         */
 173                                           /*00xxxx:           disable        */
 174
 175 /* CAM_Ctl bit asign ------------------------------------------------------- */
 176 #define CAM_CompEn             0x00000010 /* 1:CAM Compare Enable            */
 177 #define CAM_NegCAM             0x00000008 /* 1:Reject packets CAM recognizes,*/
 178                                           /*                    accept other */
 179 #define CAM_BroadAcc           0x00000004 /* 1:Broadcast assept              */
 180 #define CAM_GroupAcc           0x00000002 /* 1:Multicast assept              */
 181 #define CAM_StationAcc         0x00000001 /* 1:unicast accept                */
 182
 183 /* CAM_Ena bit asign ------------------------------------------------------- */
 184 #define CAM_ENTRY_MAX                  21   /* CAM Data entry max count      */
 185 #define CAM_Ena_Mask ((1<<CAM_ENTRY_MAX)-1) /* CAM Enable bits (Max 21bits)  */
 186 #define CAM_Ena_Bit(index)         (1<<(index))
 187 #define CAM_ENTRY_DESTINATION   0
 188 #define CAM_ENTRY_SOURCE        1
 189 #define CAM_ENTRY_MACCTL        20
 190
 191 /* Tx_Ctl bit asign -------------------------------------------------------- */
 192 #define Tx_En                  0x00000001 /* 1:Transmit enable               */
 193 #define Tx_TxHalt              0x00000002 /* 1:Transmit Halt Request         */
 194 #define Tx_NoPad               0x00000004 /* 1:Suppress Padding              */
 195 #define Tx_NoCRC               0x00000008 /* 1:Suppress Padding              */
 196 #define Tx_FBack               0x00000010 /* 1:Fast Back-off                 */
 197 #define Tx_EnUnder             0x00000100 /* 1:Enable Underrun               */
 198 #define Tx_EnExDefer           0x00000200 /* 1:Enable Excessive Deferral     */
 199 #define Tx_EnLCarr             0x00000400 /* 1:Enable Lost Carrier           */
 200 #define Tx_EnExColl            0x00000800 /* 1:Enable Excessive Collision    */
 201 #define Tx_EnLateColl          0x00001000 /* 1:Enable Late Collision         */
 202 #define Tx_EnTxPar             0x00002000 /* 1:Enable Transmit Parity        */
 203 #define Tx_EnComp              0x00004000 /* 1:Enable Completion             */
 204
 205 /* Tx_Stat bit asign ------------------------------------------------------- */
 206 #define Tx_TxColl_MASK         0x0000000F /* Tx Collision Count              */
 207 #define Tx_ExColl              0x00000010 /* Excessive Collision             */
 208 #define Tx_TXDefer             0x00000020 /* Transmit Defered                */
 209 #define Tx_Paused              0x00000040 /* Transmit Paused                 */
 210 #define Tx_IntTx               0x00000080 /* Interrupt on Tx                 */
 211 #define Tx_Under               0x00000100 /* Underrun                        */
 212 #define Tx_Defer               0x00000200 /* Deferral                        */
 213 #define Tx_NCarr               0x00000400 /* No Carrier                      */
 214 #define Tx_10Stat              0x00000800 /* 10Mbps Status                   */
 215 #define Tx_LateColl            0x00001000 /* Late Collision                  */
 216 #define Tx_TxPar               0x00002000 /* Tx Parity Error                 */
 217 #define Tx_Comp                0x00004000 /* Completion                      */
 218 #define Tx_Halted              0x00008000 /* Tx Halted                       */
 219 #define Tx_SQErr               0x00010000 /* Signal Quality Error(SQE)       */
 220
 221 /* Rx_Ctl bit asign -------------------------------------------------------- */
 222 #define Rx_EnGood              0x00004000 /* 1:Enable Good                   */
 223 #define Rx_EnRxPar             0x00002000 /* 1:Enable Receive Parity         */
 224 #define Rx_EnLongErr           0x00000800 /* 1:Enable Long Error             */
 225 #define Rx_EnOver              0x00000400 /* 1:Enable OverFlow               */
 226 #define Rx_EnCRCErr            0x00000200 /* 1:Enable CRC Error              */
 227 #define Rx_EnAlign             0x00000100 /* 1:Enable Alignment              */
 228 #define Rx_IgnoreCRC           0x00000040 /* 1:Ignore CRC Value              */
 229 #define Rx_StripCRC            0x00000010 /* 1:Strip CRC Value               */
 230 #define Rx_ShortEn             0x00000008 /* 1:Short Enable                  */
 231 #define Rx_LongEn              0x00000004 /* 1:Long Enable                   */
 232 #define Rx_RxHalt              0x00000002 /* 1:Receive Halt Request          */
 233 #define Rx_RxEn                0x00000001 /* 1:Receive Intrrupt Enable       */
 234
 235 /* Rx_Stat bit asign ------------------------------------------------------- */
 236 #define Rx_Halted              0x00008000 /* Rx Halted                       */
 237 #define Rx_Good                0x00004000 /* Rx Good                         */
 238 #define Rx_RxPar               0x00002000 /* Rx Parity Error                 */
 239                             /* 0x00001000    not use                         */
 240 #define Rx_LongErr             0x00000800 /* Rx Long Error                   */
 241 #define Rx_Over                0x00000400 /* Rx Overflow                     */
 242 #define Rx_CRCErr              0x00000200 /* Rx CRC Error                    */
 243 #define Rx_Align               0x00000100 /* Rx Alignment Error              */
 244 #define Rx_10Stat              0x00000080 /* Rx 10Mbps Status                */
 245 #define Rx_IntRx               0x00000040 /* Rx Interrupt                    */
 246 #define Rx_CtlRecd             0x00000020 /* Rx Control Receive              */
 247
 248 #define Rx_Stat_Mask           0x0000EFC0 /* Rx All Status Mask              */
 249
 250 /* Int_En bit asign -------------------------------------------------------- */
 251 #define Int_NRAbtEn            0x00000800 /* 1:Non-recoverable Abort Enable  */
 252 #define Int_TxCtlCmpEn         0x00000400 /* 1:Transmit Control Complete Enable */
 253 #define Int_DmParErrEn         0x00000200 /* 1:DMA Parity Error Enable       */
 254 #define Int_DParDEn            0x00000100 /* 1:Data Parity Error Enable      */
 255 #define Int_EarNotEn           0x00000080 /* 1:Early Notify Enable           */
 256 #define Int_DParErrEn          0x00000040 /* 1:Detected Parity Error Enable  */
 257 #define Int_SSysErrEn          0x00000020 /* 1:Signalled System Error Enable */
 258 #define Int_RMasAbtEn          0x00000010 /* 1:Received Master Abort Enable  */
 259 #define Int_RTargAbtEn         0x00000008 /* 1:Received Target Abort Enable  */
 260 #define Int_STargAbtEn         0x00000004 /* 1:Signalled Target Abort Enable */
 261 #define Int_BLExEn             0x00000002 /* 1:Buffer List Exhausted Enable  */
 262 #define Int_FDAExEn            0x00000001 /* 1:Free Descriptor Area          */
 263                                           /*               Exhausted Enable  */
 264
 265 /* Int_Src bit asign ------------------------------------------------------- */
 266 #define Int_NRabt              0x00004000 /* 1:Non Recoverable error         */
 267 #define Int_DmParErrStat       0x00002000 /* 1:DMA Parity Error & Clear      */
 268 #define Int_BLEx               0x00001000 /* 1:Buffer List Empty & Clear     */
 269 #define Int_FDAEx              0x00000800 /* 1:FDA Empty & Clear             */
 270 #define Int_IntNRAbt           0x00000400 /* 1:Non Recoverable Abort         */
 271 #define Int_IntCmp             0x00000200 /* 1:MAC control packet complete   */
 272 #define Int_IntExBD            0x00000100 /* 1:Interrupt Extra BD & Clear    */
 273 #define Int_DmParErr           0x00000080 /* 1:DMA Parity Error & Clear      */
 274 #define Int_IntEarNot          0x00000040 /* 1:Receive Data write & Clear    */
 275 #define Int_SWInt              0x00000020 /* 1:Software request & Clear      */
 276 #define Int_IntBLEx            0x00000010 /* 1:Buffer List Empty & Clear     */
 277 #define Int_IntFDAEx           0x00000008 /* 1:FDA Empty & Clear             */
 278 #define Int_IntPCI             0x00000004 /* 1:PCI controller & Clear        */
 279 #define Int_IntMacRx           0x00000002 /* 1:Rx controller & Clear         */
 280 #define Int_IntMacTx           0x00000001 /* 1:Tx controller & Clear         */
 281
 282 /* MD_CA bit asign --------------------------------------------------------- */
 283 #define MD_CA_PreSup           0x00001000 /* 1:Preamble Supress              */
 284 #define MD_CA_Busy             0x00000800 /* 1:Busy (Start Operation)        */
 285 #define MD_CA_Wr               0x00000400 /* 1:Write 0:Read                  */
 286
 287
 288 /*
 289  * Descriptors
 290  */
 291
 292 /* Frame descripter */
 293 struct FDesc {
 294         volatile __u32 FDNext;
 295         volatile __u32 FDSystem;
 296         volatile __u32 FDStat;
 297         volatile __u32 FDCtl;
 298 };
 299
 300 /* Buffer descripter */
 301 struct BDesc {
 302         volatile __u32 BuffData;
 303         volatile __u32 BDCtl;
 304 };
 305
 306 #define FD_ALIGN        16
 307
 308 /* Frame Descripter bit asign ---------------------------------------------- */
 309 #define FD_FDLength_MASK       0x0000FFFF /* Length MASK                     */
 310 #define FD_BDCnt_MASK          0x001F0000 /* BD count MASK in FD             */
 311 #define FD_FrmOpt_MASK         0x7C000000 /* Frame option MASK               */
 312 #define FD_FrmOpt_BigEndian    0x40000000 /* Tx/Rx */
 313 #define FD_FrmOpt_IntTx        0x20000000 /* Tx only */
 314 #define FD_FrmOpt_NoCRC        0x10000000 /* Tx only */
 315 #define FD_FrmOpt_NoPadding    0x08000000 /* Tx only */
 316 #define FD_FrmOpt_Packing      0x04000000 /* Rx only */
 317 #define FD_CownsFD             0x80000000 /* FD Controller owner bit         */
 318 #define FD_Next_EOL            0x00000001 /* FD EOL indicator                */
 319 #define FD_BDCnt_SHIFT         16
 320
 321 /* Buffer Descripter bit asign --------------------------------------------- */
 322 #define BD_BuffLength_MASK     0x0000FFFF /* Recieve Data Size               */
 323 #define BD_RxBDID_MASK         0x00FF0000 /* BD ID Number MASK               */
 324 #define BD_RxBDSeqN_MASK       0x7F000000 /* Rx BD Sequence Number           */
 325 #define BD_CownsBD             0x80000000 /* BD Controller owner bit         */
 326 #define BD_RxBDID_SHIFT        16
 327 #define BD_RxBDSeqN_SHIFT      24
 328
 329
 330 /* Some useful constants. */
 331 #undef NO_CHECK_CARRIER /* Does not check No-Carrier with TP */
 332
 333 #ifdef NO_CHECK_CARRIER
 334 #define TX_CTL_CMD      (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
 335         Tx_EnExColl | Tx_EnExDefer | Tx_EnUnder | \
 336         Tx_En)  /* maybe  0x7b01 */
 337 #else
 338 #define TX_CTL_CMD      (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
 339         Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
 340         Tx_En)  /* maybe  0x7b01 */
 341 #endif
 342 #define RX_CTL_CMD      (Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
 343         | Rx_EnCRCErr | Rx_EnAlign | Rx_RxEn)   /* maybe 0x6f01 */
 344 #define INT_EN_CMD  (Int_NRAbtEn | \
 345         Int_DmParErrEn | Int_DParDEn | Int_DParErrEn | \
 346         Int_SSysErrEn  | Int_RMasAbtEn | Int_RTargAbtEn | \
 347         Int_STargAbtEn | \
 348         Int_BLExEn  | Int_FDAExEn) /* maybe 0xb7f*/
 349 #define DMA_CTL_CMD     DMA_BURST_SIZE
 350 #define HAVE_DMA_RXALIGN(lp)    likely((lp)->boardtype != TC35815CF)
 351
 352 /* Tuning parameters */
 353 #define DMA_BURST_SIZE  32
 354 #define TX_THRESHOLD    1024
 355 #define TX_THRESHOLD_MAX 1536       /* used threshold with packet max byte for low pci transfer ability.*/
 356 #define TX_THRESHOLD_KEEP_LIMIT 10  /* setting threshold max value when overrun error occured this count. */
 357
 358 /* 16 + RX_BUF_NUM * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*FD_PAGE_NUM */
 359 #ifdef TC35815_USE_PACKEDBUFFER
 360 #define FD_PAGE_NUM 2
 361 #define RX_BUF_NUM      8       /* >= 2 */
 362 #define RX_FD_NUM       250     /* >= 32 */
 363 #define TX_FD_NUM       128
 364 #define RX_BUF_SIZE     PAGE_SIZE
 365 #else /* TC35815_USE_PACKEDBUFFER */
 366 #define FD_PAGE_NUM 4
 367 #define RX_BUF_NUM      128     /* < 256 */
 368 #define RX_FD_NUM       256     /* >= 32 */
 369 #define TX_FD_NUM       128
 370 #if RX_CTL_CMD & Rx_LongEn
 371 #define RX_BUF_SIZE     PAGE_SIZE
 372 #elif RX_CTL_CMD & Rx_StripCRC
 373 #define RX_BUF_SIZE     ALIGN(ETH_FRAME_LEN + 4 + 2, 32) /* +2: reserve */
 374 #else
 375 #define RX_BUF_SIZE     ALIGN(ETH_FRAME_LEN + 2, 32) /* +2: reserve */
 376 #endif
 377 #endif /* TC35815_USE_PACKEDBUFFER */
 378 #define RX_FD_RESERVE   (2 / 2) /* max 2 BD per RxFD */
 379 #define NAPI_WEIGHT     16
 380
 381 struct TxFD {
 382         struct FDesc fd;
 383         struct BDesc bd;
 384         struct BDesc unused;
 385 };
 386
 387 struct RxFD {
 388         struct FDesc fd;
 389         struct BDesc bd[0];     /* variable length */
 390 };
 391
 392 struct FrFD {
 393         struct FDesc fd;
 394         struct BDesc bd[RX_BUF_NUM];
 395 };
 396
 397
 398 #define tc_readl(addr)  readl(addr)
 399 #define tc_writel(d, addr)      writel(d, addr)
 400
 401 #define TC35815_TX_TIMEOUT  msecs_to_jiffies(400)
 402
 403 /* Timer state engine. */
 404 enum tc35815_timer_state {
 405         arbwait  = 0,   /* Waiting for auto negotiation to complete.          */
 406         lupwait  = 1,   /* Auto-neg complete, awaiting link-up status.        */
 407         ltrywait = 2,   /* Forcing try of all modes, from fastest to slowest. */
 408         asleep   = 3,   /* Time inactive.                                     */
 409         lcheck   = 4,   /* Check link status.                                 */
 410 };
 411
 412 /* Information that need to be kept for each board. */
 413 struct tc35815_local {
 414         struct pci_dev *pci_dev;
 415
 416         /* statistics */
 417         struct net_device_stats stats;
 418         struct {
 419                 int max_tx_qlen;
 420                 int tx_ints;
 421                 int rx_ints;
 422                 int tx_underrun;
 423         } lstats;
 424
 425         /* Tx control lock.  This protects the transmit buffer ring
 426          * state along with the "tx full" state of the driver.  This
 427          * means all netif_queue flow control actions are protected
 428          * by this lock as well.
 429          */
 430         spinlock_t lock;
 431
 432         int phy_addr;
 433         int fullduplex;
 434         unsigned short saved_lpa;
 435         struct timer_list timer;
 436         enum tc35815_timer_state timer_state; /* State of auto-neg timer. */
 437         unsigned int timer_ticks;       /* Number of clicks at each state  */
 438
 439         /*
 440          * Transmitting: Batch Mode.
 441          *      1 BD in 1 TxFD.
 442          * Receiving: Packing Mode. (TC35815_USE_PACKEDBUFFER)
 443          *      1 circular FD for Free Buffer List.
 444          *      RX_BUF_NUM BD in Free Buffer FD.
 445          *      One Free Buffer BD has PAGE_SIZE data buffer.
 446          * Or Non-Packing Mode.
 447          *      1 circular FD for Free Buffer List.
 448          *      RX_BUF_NUM BD in Free Buffer FD.
 449          *      One Free Buffer BD has ETH_FRAME_LEN data buffer.
 450          */
 451         void * fd_buf;  /* for TxFD, RxFD, FrFD */
 452         dma_addr_t fd_buf_dma;
 453         struct TxFD *tfd_base;
 454         unsigned int tfd_start;
 455         unsigned int tfd_end;
 456         struct RxFD *rfd_base;
 457         struct RxFD *rfd_limit;
 458         struct RxFD *rfd_cur;
 459         struct FrFD *fbl_ptr;
 460 #ifdef TC35815_USE_PACKEDBUFFER
 461         unsigned char fbl_curid;
 462         void * data_buf[RX_BUF_NUM];            /* packing */
 463         dma_addr_t data_buf_dma[RX_BUF_NUM];
 464         struct {
 465                 struct sk_buff *skb;
 466                 dma_addr_t skb_dma;
 467         } tx_skbs[TX_FD_NUM];
 468 #else
 469         unsigned int fbl_count;
 470         struct {
 471                 struct sk_buff *skb;
 472                 dma_addr_t skb_dma;
 473         } tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
 474 #endif
 475         struct mii_if_info mii;
 476         unsigned short mii_id[2];
 477         u32 msg_enable;
 478         board_t boardtype;
 479 };
 480
 481 static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
 482 {
 483         return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
 484 }
 485 #ifdef DEBUG
 486 static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
 487 {
 488         return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
 489 }
 490 #endif
 491 #ifdef TC35815_USE_PACKEDBUFFER
 492 static inline void *rxbuf_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
 493 {
 494         int i;
 495         for (i = 0; i < RX_BUF_NUM; i++) {
 496                 if (bus >= lp->data_buf_dma[i] &&
 497                     bus < lp->data_buf_dma[i] + PAGE_SIZE)
 498                         return (void *)((u8 *)lp->data_buf[i] +
 499                                         (bus - lp->data_buf_dma[i]));
 500         }
 501         return NULL;
 502 }
 503
 504 #define TC35815_DMA_SYNC_ONDEMAND
 505 static void* alloc_rxbuf_page(struct pci_dev *hwdev, dma_addr_t *dma_handle)
 506 {
 507 #ifdef TC35815_DMA_SYNC_ONDEMAND
 508         void *buf;
 509         /* pci_map + pci_dma_sync will be more effective than
 510          * pci_alloc_consistent on some archs. */
 511         if ((buf = (void *)__get_free_page(GFP_ATOMIC)) == NULL)
 512                 return NULL;
 513         *dma_handle = pci_map_single(hwdev, buf, PAGE_SIZE,
 514                                      PCI_DMA_FROMDEVICE);
 515         if (pci_dma_mapping_error(*dma_handle)) {
 516                 free_page((unsigned long)buf);
 517                 return NULL;
 518         }
 519         return buf;
 520 #else
 521         return pci_alloc_consistent(hwdev, PAGE_SIZE, dma_handle);
 522 #endif
 523 }
 524
 525 static void free_rxbuf_page(struct pci_dev *hwdev, void *buf, dma_addr_t dma_handle)
 526 {
 527 #ifdef TC35815_DMA_SYNC_ONDEMAND
 528         pci_unmap_single(hwdev, dma_handle, PAGE_SIZE, PCI_DMA_FROMDEVICE);
 529         free_page((unsigned long)buf);
 530 #else
 531         pci_free_consistent(hwdev, PAGE_SIZE, buf, dma_handle);
 532 #endif
 533 }
 534 #else /* TC35815_USE_PACKEDBUFFER */
 535 static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
 536                                        struct pci_dev *hwdev,
 537                                        dma_addr_t *dma_handle)
 538 {
 539         struct sk_buff *skb;
 540         skb = dev_alloc_skb(RX_BUF_SIZE);
 541         if (!skb)
 542                 return NULL;
 543         *dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
 544                                      PCI_DMA_FROMDEVICE);
 545         if (pci_dma_mapping_error(*dma_handle)) {
 546                 dev_kfree_skb_any(skb);
 547                 return NULL;
 548         }
 549         skb_reserve(skb, 2);    /* make IP header 4byte aligned */
 550         return skb;
 551 }
 552
 553 static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
 554 {
 555         pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
 556                          PCI_DMA_FROMDEVICE);
 557         dev_kfree_skb_any(skb);
 558 }
 559 #endif /* TC35815_USE_PACKEDBUFFER */
 560
 561 /* Index to functions, as function prototypes. */
 562
 563 static int      tc35815_open(struct net_device *dev);
 564 static int      tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
 565 static irqreturn_t      tc35815_interrupt(int irq, void *dev_id);
 566 #ifdef TC35815_NAPI
 567 static int      tc35815_rx(struct net_device *dev, int limit);
 568 static int      tc35815_poll(struct net_device *dev, int *budget);
 569 #else
 570 static void     tc35815_rx(struct net_device *dev);
 571 #endif
 572 static void     tc35815_txdone(struct net_device *dev);
 573 static int      tc35815_close(struct net_device *dev);
 574 static struct   net_device_stats *tc35815_get_stats(struct net_device *dev);
 575 static void     tc35815_set_multicast_list(struct net_device *dev);
 576 static void     tc35815_tx_timeout(struct net_device *dev);
 577 static int      tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 578 #ifdef CONFIG_NET_POLL_CONTROLLER
 579 static void     tc35815_poll_controller(struct net_device *dev);
 580 #endif
 581 static const struct ethtool_ops tc35815_ethtool_ops;
 582
 583 /* Example routines you must write ;->. */
 584 static void     tc35815_chip_reset(struct net_device *dev);
 585 static void     tc35815_chip_init(struct net_device *dev);
 586 static void     tc35815_find_phy(struct net_device *dev);
 587 static void     tc35815_phy_chip_init(struct net_device *dev);
 588
 589 #ifdef DEBUG
 590 static void     panic_queues(struct net_device *dev);
 591 #endif
 592
 593 static void tc35815_timer(unsigned long data);
 594 static void tc35815_start_auto_negotiation(struct net_device *dev,
 595                                            struct ethtool_cmd *ep);
 596 static int tc_mdio_read(struct net_device *dev, int phy_id, int location);
 597 static void tc_mdio_write(struct net_device *dev, int phy_id, int location,
 598                           int val);
 599
 600 static void __devinit tc35815_init_dev_addr (struct net_device *dev)
 601 {
 602         struct tc35815_regs __iomem *tr =
 603                 (struct tc35815_regs __iomem *)dev->base_addr;
 604         int i;
 605
 606         /* dev_addr will be overwritten on NETDEV_REGISTER event */
 607         while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 608                 ;
 609         for (i = 0; i < 6; i += 2) {
 610                 unsigned short data;
 611                 tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
 612                 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 613                         ;
 614                 data = tc_readl(&tr->PROM_Data);
 615                 dev->dev_addr[i] = data & 0xff;
 616                 dev->dev_addr[i+1] = data >> 8;
 617         }
 618 }
 619
 620 static int __devinit tc35815_init_one (struct pci_dev *pdev,
 621                                        const struct pci_device_id *ent)
 622 {
 623         void __iomem *ioaddr = NULL;
 624         struct net_device *dev;
 625         struct tc35815_local *lp;
 626         int rc;
 627         unsigned long mmio_start, mmio_end, mmio_flags, mmio_len;
 628
 629         static int printed_version;
 630         if (!printed_version++) {
 631                 printk(version);
 632                 dev_printk(KERN_DEBUG, &pdev->dev,
 633                            "speed:%d duplex:%d doforce:%d\n",
 634                            options.speed, options.duplex, options.doforce);
 635         }
 636
 637         if (!pdev->irq) {
 638                 dev_warn(&pdev->dev, "no IRQ assigned.\n");
 639                 return -ENODEV;
 640         }
 641
 642         /* dev zeroed in alloc_etherdev */
 643         dev = alloc_etherdev (sizeof (*lp));
 644         if (dev == NULL) {
 645                 dev_err(&pdev->dev, "unable to alloc new ethernet\n");
 646                 return -ENOMEM;
 647         }
 648         SET_MODULE_OWNER(dev);
 649         SET_NETDEV_DEV(dev, &pdev->dev);
 650         lp = dev->priv;
 651
 652         /* enable device (incl. PCI PM wakeup), and bus-mastering */
 653         rc = pci_enable_device (pdev);
 654         if (rc)
 655                 goto err_out;
 656
 657         mmio_start = pci_resource_start (pdev, 1);
 658         mmio_end = pci_resource_end (pdev, 1);
 659         mmio_flags = pci_resource_flags (pdev, 1);
 660         mmio_len = pci_resource_len (pdev, 1);
 661
 662         /* set this immediately, we need to know before
 663          * we talk to the chip directly */
 664
 665         /* make sure PCI base addr 1 is MMIO */
 666         if (!(mmio_flags & IORESOURCE_MEM)) {
 667                 dev_err(&pdev->dev, "region #1 not an MMIO resource, aborting\n");
 668                 rc = -ENODEV;
 669                 goto err_out;
 670         }
 671
 672         /* check for weird/broken PCI region reporting */
 673         if ((mmio_len < sizeof(struct tc35815_regs))) {
 674                 dev_err(&pdev->dev, "Invalid PCI region size(s), aborting\n");
 675                 rc = -ENODEV;
 676                 goto err_out;
 677         }
 678
 679         rc = pci_request_regions (pdev, MODNAME);
 680         if (rc)
 681                 goto err_out;
 682
 683         pci_set_master (pdev);
 684
 685         /* ioremap MMIO region */
 686         ioaddr = ioremap (mmio_start, mmio_len);
 687         if (ioaddr == NULL) {
 688                 dev_err(&pdev->dev, "cannot remap MMIO, aborting\n");
 689                 rc = -EIO;
 690                 goto err_out_free_res;
 691         }
 692
 693         /* Initialize the device structure. */
 694         dev->open = tc35815_open;
 695         dev->hard_start_xmit = tc35815_send_packet;
 696         dev->stop = tc35815_close;
 697         dev->get_stats = tc35815_get_stats;
 698         dev->set_multicast_list = tc35815_set_multicast_list;
 699         dev->do_ioctl = tc35815_ioctl;
 700         dev->ethtool_ops = &tc35815_ethtool_ops;
 701         dev->tx_timeout = tc35815_tx_timeout;
 702         dev->watchdog_timeo = TC35815_TX_TIMEOUT;
 703 #ifdef TC35815_NAPI
 704         dev->poll = tc35815_poll;
 705         dev->weight = NAPI_WEIGHT;
 706 #endif
 707 #ifdef CONFIG_NET_POLL_CONTROLLER
 708         dev->poll_controller = tc35815_poll_controller;
 709 #endif
 710
 711         dev->irq = pdev->irq;
 712         dev->base_addr = (unsigned long) ioaddr;
 713
 714         /* dev->priv/lp zeroed and aligned in alloc_etherdev */
 715         lp = dev->priv;
 716         spin_lock_init(&lp->lock);
 717         lp->pci_dev = pdev;
 718         lp->boardtype = ent->driver_data;
 719
 720         lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
 721         pci_set_drvdata(pdev, dev);
 722
 723         /* Soft reset the chip. */
 724         tc35815_chip_reset(dev);
 725
 726         /* Retrieve the ethernet address. */
 727         tc35815_init_dev_addr(dev);
 728
 729         rc = register_netdev (dev);
 730         if (rc)
 731                 goto err_out_unmap;
 732
 733         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
 734         printk(KERN_INFO "%s: %s at 0x%lx, "
 735                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
 736                 "IRQ %d\n",
 737                 dev->name,
 738                 board_info[ent->driver_data].name,
 739                 dev->base_addr,
 740                 dev->dev_addr[0], dev->dev_addr[1],
 741                 dev->dev_addr[2], dev->dev_addr[3],
 742                 dev->dev_addr[4], dev->dev_addr[5],
 743                 dev->irq);
 744
 745         setup_timer(&lp->timer, tc35815_timer, (unsigned long) dev);
 746         lp->mii.dev = dev;
 747         lp->mii.mdio_read = tc_mdio_read;
 748         lp->mii.mdio_write = tc_mdio_write;
 749         lp->mii.phy_id_mask = 0x1f;
 750         lp->mii.reg_num_mask = 0x1f;
 751         tc35815_find_phy(dev);
 752         lp->mii.phy_id = lp->phy_addr;
 753         lp->mii.full_duplex = 0;
 754         lp->mii.force_media = 0;
 755
 756         return 0;
 757
 758 err_out_unmap:
 759         iounmap(ioaddr);
 760 err_out_free_res:
 761         pci_release_regions (pdev);
 762 err_out:
 763         free_netdev (dev);
 764         return rc;
 765 }
 766
 767
 768 static void __devexit tc35815_remove_one (struct pci_dev *pdev)
 769 {
 770         struct net_device *dev = pci_get_drvdata (pdev);
 771         unsigned long mmio_addr;
 772
 773         mmio_addr = dev->base_addr;
 774
 775         unregister_netdev (dev);
 776
 777         if (mmio_addr) {
 778                 iounmap ((void __iomem *)mmio_addr);
 779                 pci_release_regions (pdev);
 780         }
 781
 782         free_netdev (dev);
 783
 784         pci_set_drvdata (pdev, NULL);
 785 }
 786
 787 static int
 788 tc35815_init_queues(struct net_device *dev)
 789 {
 790         struct tc35815_local *lp = dev->priv;
 791         int i;
 792         unsigned long fd_addr;
 793
 794         if (!lp->fd_buf) {
 795                 BUG_ON(sizeof(struct FDesc) +
 796                        sizeof(struct BDesc) * RX_BUF_NUM +
 797                        sizeof(struct FDesc) * RX_FD_NUM +
 798                        sizeof(struct TxFD) * TX_FD_NUM >
 799                        PAGE_SIZE * FD_PAGE_NUM);
 800
 801                 if ((lp->fd_buf = pci_alloc_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM, &lp->fd_buf_dma)) == 0)
 802                         return -ENOMEM;
 803                 for (i = 0; i < RX_BUF_NUM; i++) {
 804 #ifdef TC35815_USE_PACKEDBUFFER
 805                         if ((lp->data_buf[i] = alloc_rxbuf_page(lp->pci_dev, &lp->data_buf_dma[i])) == NULL) {
 806                                 while (--i >= 0) {
 807                                         free_rxbuf_page(lp->pci_dev,
 808                                                         lp->data_buf[i],
 809                                                         lp->data_buf_dma[i]);
 810                                         lp->data_buf[i] = NULL;
 811                                 }
 812                                 pci_free_consistent(lp->pci_dev,
 813                                                     PAGE_SIZE * FD_PAGE_NUM,
 814                                                     lp->fd_buf,
 815                                                     lp->fd_buf_dma);
 816                                 lp->fd_buf = NULL;
 817                                 return -ENOMEM;
 818                         }
 819 #else
 820                         lp->rx_skbs[i].skb =
 821                                 alloc_rxbuf_skb(dev, lp->pci_dev,
 822                                                 &lp->rx_skbs[i].skb_dma);
 823                         if (!lp->rx_skbs[i].skb) {
 824                                 while (--i >= 0) {
 825                                         free_rxbuf_skb(lp->pci_dev,
 826                                                        lp->rx_skbs[i].skb,
 827                                                        lp->rx_skbs[i].skb_dma);
 828                                         lp->rx_skbs[i].skb = NULL;
 829                                 }
 830                                 pci_free_consistent(lp->pci_dev,
 831                                                     PAGE_SIZE * FD_PAGE_NUM,
 832                                                     lp->fd_buf,
 833                                                     lp->fd_buf_dma);
 834                                 lp->fd_buf = NULL;
 835                                 return -ENOMEM;
 836                         }
 837 #endif
 838                 }
 839                 printk(KERN_DEBUG "%s: FD buf %p DataBuf",
 840                        dev->name, lp->fd_buf);
 841 #ifdef TC35815_USE_PACKEDBUFFER
 842                 printk(" DataBuf");
 843                 for (i = 0; i < RX_BUF_NUM; i++)
 844                         printk(" %p", lp->data_buf[i]);
 845 #endif
 846                 printk("\n");
 847         } else {
 848                 for (i = 0; i < FD_PAGE_NUM; i++) {
 849                         clear_page((void *)((unsigned long)lp->fd_buf + i * PAGE_SIZE));
 850                 }
 851         }
 852         fd_addr = (unsigned long)lp->fd_buf;
 853
 854         /* Free Descriptors (for Receive) */
 855         lp->rfd_base = (struct RxFD *)fd_addr;
 856         fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
 857         for (i = 0; i < RX_FD_NUM; i++) {
 858                 lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
 859         }
 860         lp->rfd_cur = lp->rfd_base;
 861         lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
 862
 863         /* Transmit Descriptors */
 864         lp->tfd_base = (struct TxFD *)fd_addr;
 865         fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
 866         for (i = 0; i < TX_FD_NUM; i++) {
 867                 lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
 868                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 869                 lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
 870         }
 871         lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
 872         lp->tfd_start = 0;
 873         lp->tfd_end = 0;
 874
 875         /* Buffer List (for Receive) */
 876         lp->fbl_ptr = (struct FrFD *)fd_addr;
 877         lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
 878         lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
 879 #ifndef TC35815_USE_PACKEDBUFFER
 880         /*
 881          * move all allocated skbs to head of rx_skbs[] array.
 882          * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
 883          * tc35815_rx() had failed.
 884          */
 885         lp->fbl_count = 0;
 886         for (i = 0; i < RX_BUF_NUM; i++) {
 887                 if (lp->rx_skbs[i].skb) {
 888                         if (i != lp->fbl_count) {
 889                                 lp->rx_skbs[lp->fbl_count].skb =
 890                                         lp->rx_skbs[i].skb;
 891                                 lp->rx_skbs[lp->fbl_count].skb_dma =
 892                                         lp->rx_skbs[i].skb_dma;
 893                         }
 894                         lp->fbl_count++;
 895                 }
 896         }
 897 #endif
 898         for (i = 0; i < RX_BUF_NUM; i++) {
 899 #ifdef TC35815_USE_PACKEDBUFFER
 900                 lp->fbl_ptr->bd[i].BuffData = cpu_to_le32(lp->data_buf_dma[i]);
 901 #else
 902                 if (i >= lp->fbl_count) {
 903                         lp->fbl_ptr->bd[i].BuffData = 0;
 904                         lp->fbl_ptr->bd[i].BDCtl = 0;
 905                         continue;
 906                 }
 907                 lp->fbl_ptr->bd[i].BuffData =
 908                         cpu_to_le32(lp->rx_skbs[i].skb_dma);
 909 #endif
 910                 /* BDID is index of FrFD.bd[] */
 911                 lp->fbl_ptr->bd[i].BDCtl =
 912                         cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
 913                                     RX_BUF_SIZE);
 914         }
 915 #ifdef TC35815_USE_PACKEDBUFFER
 916         lp->fbl_curid = 0;
 917 #endif
 918
 919         printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
 920                dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
 921         return 0;
 922 }
 923
 924 static void
 925 tc35815_clear_queues(struct net_device *dev)
 926 {
 927         struct tc35815_local *lp = dev->priv;
 928         int i;
 929
 930         for (i = 0; i < TX_FD_NUM; i++) {
 931                 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
 932                 struct sk_buff *skb =
 933                         fdsystem != 0xffffffff ?
 934                         lp->tx_skbs[fdsystem].skb : NULL;
 935 #ifdef DEBUG
 936                 if (lp->tx_skbs[i].skb != skb) {
 937                         printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
 938                         panic_queues(dev);
 939                 }
 940 #else
 941                 BUG_ON(lp->tx_skbs[i].skb != skb);
 942 #endif
 943                 if (skb) {
 944                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
 945                         lp->tx_skbs[i].skb = NULL;
 946                         lp->tx_skbs[i].skb_dma = 0;
 947                         dev_kfree_skb_any(skb);
 948                 }
 949                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 950         }
 951
 952         tc35815_init_queues(dev);
 953 }
 954
 955 static void
 956 tc35815_free_queues(struct net_device *dev)
 957 {
 958         struct tc35815_local *lp = dev->priv;
 959         int i;
 960
 961         if (lp->tfd_base) {
 962                 for (i = 0; i < TX_FD_NUM; i++) {
 963                         u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
 964                         struct sk_buff *skb =
 965                                 fdsystem != 0xffffffff ?
 966                                 lp->tx_skbs[fdsystem].skb : NULL;
 967 #ifdef DEBUG
 968                         if (lp->tx_skbs[i].skb != skb) {
 969                                 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
 970                                 panic_queues(dev);
 971                         }
 972 #else
 973                         BUG_ON(lp->tx_skbs[i].skb != skb);
 974 #endif
 975                         if (skb) {
 976                                 dev_kfree_skb(skb);
 977                                 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
 978                                 lp->tx_skbs[i].skb = NULL;
 979                                 lp->tx_skbs[i].skb_dma = 0;
 980                         }
 981                         lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 982                 }
 983         }
 984
 985         lp->rfd_base = NULL;
 986         lp->rfd_limit = NULL;
 987         lp->rfd_cur = NULL;
 988         lp->fbl_ptr = NULL;
 989
 990         for (i = 0; i < RX_BUF_NUM; i++) {
 991 #ifdef TC35815_USE_PACKEDBUFFER
 992                 if (lp->data_buf[i]) {
 993                         free_rxbuf_page(lp->pci_dev,
 994                                         lp->data_buf[i], lp->data_buf_dma[i]);
 995                         lp->data_buf[i] = NULL;
 996                 }
 997 #else
 998                 if (lp->rx_skbs[i].skb) {
 999                         free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
1000                                        lp->rx_skbs[i].skb_dma);
1001                         lp->rx_skbs[i].skb = NULL;
1002                 }
1003 #endif
1004         }
1005         if (lp->fd_buf) {
1006                 pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
1007                                     lp->fd_buf, lp->fd_buf_dma);
1008                 lp->fd_buf = NULL;
1009         }
1010 }
1011
1012 static void
1013 dump_txfd(struct TxFD *fd)
1014 {
1015         printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
1016                le32_to_cpu(fd->fd.FDNext),
1017                le32_to_cpu(fd->fd.FDSystem),
1018                le32_to_cpu(fd->fd.FDStat),
1019                le32_to_cpu(fd->fd.FDCtl));
1020         printk("BD: ");
1021         printk(" %08x %08x",
1022                le32_to_cpu(fd->bd.BuffData),
1023                le32_to_cpu(fd->bd.BDCtl));
1024         printk("\n");
1025 }
1026
1027 static int
1028 dump_rxfd(struct RxFD *fd)
1029 {
1030         int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1031         if (bd_count > 8)
1032                 bd_count = 8;
1033         printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
1034                le32_to_cpu(fd->fd.FDNext),
1035                le32_to_cpu(fd->fd.FDSystem),
1036                le32_to_cpu(fd->fd.FDStat),
1037                le32_to_cpu(fd->fd.FDCtl));
1038         if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
1039             return 0;
1040         printk("BD: ");
1041         for (i = 0; i < bd_count; i++)
1042                 printk(" %08x %08x",
1043                        le32_to_cpu(fd->bd[i].BuffData),
1044                        le32_to_cpu(fd->bd[i].BDCtl));
1045         printk("\n");
1046         return bd_count;
1047 }
1048
1049 #if defined(DEBUG) || defined(TC35815_USE_PACKEDBUFFER)
1050 static void
1051 dump_frfd(struct FrFD *fd)
1052 {
1053         int i;
1054         printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
1055                le32_to_cpu(fd->fd.FDNext),
1056                le32_to_cpu(fd->fd.FDSystem),
1057                le32_to_cpu(fd->fd.FDStat),
1058                le32_to_cpu(fd->fd.FDCtl));
1059         printk("BD: ");
1060         for (i = 0; i < RX_BUF_NUM; i++)
1061                 printk(" %08x %08x",
1062                        le32_to_cpu(fd->bd[i].BuffData),
1063                        le32_to_cpu(fd->bd[i].BDCtl));
1064         printk("\n");
1065 }
1066 #endif
1067
1068 #ifdef DEBUG
1069 static void
1070 panic_queues(struct net_device *dev)
1071 {
1072         struct tc35815_local *lp = dev->priv;
1073         int i;
1074
1075         printk("TxFD base %p, start %u, end %u\n",
1076                lp->tfd_base, lp->tfd_start, lp->tfd_end);
1077         printk("RxFD base %p limit %p cur %p\n",
1078                lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
1079         printk("FrFD %p\n", lp->fbl_ptr);
1080         for (i = 0; i < TX_FD_NUM; i++)
1081                 dump_txfd(&lp->tfd_base[i]);
1082         for (i = 0; i < RX_FD_NUM; i++) {
1083                 int bd_count = dump_rxfd(&lp->rfd_base[i]);
1084                 i += (bd_count + 1) / 2;        /* skip BDs */
1085         }
1086         dump_frfd(lp->fbl_ptr);
1087         panic("%s: Illegal queue state.", dev->name);
1088 }
1089 #endif
1090
1091 static void print_eth(char *add)
1092 {
1093         int i;
1094
1095         printk("print_eth(%p)\n", add);
1096         for (i = 0; i < 6; i++)
1097                 printk(" %2.2X", (unsigned char) add[i + 6]);
1098         printk(" =>");
1099         for (i = 0; i < 6; i++)
1100                 printk(" %2.2X", (unsigned char) add[i]);
1101         printk(" : %2.2X%2.2X\n", (unsigned char) add[12], (unsigned char) add[13]);
1102 }
1103
1104 static int tc35815_tx_full(struct net_device *dev)
1105 {
1106         struct tc35815_local *lp = dev->priv;
1107         return ((lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end);
1108 }
1109
1110 static void tc35815_restart(struct net_device *dev)
1111 {
1112         struct tc35815_local *lp = dev->priv;
1113         int pid = lp->phy_addr;
1114         int do_phy_reset = 1;
1115         del_timer(&lp->timer);          /* Kill if running      */
1116
1117         if (lp->mii_id[0] == 0x0016 && (lp->mii_id[1] & 0xfc00) == 0xf800) {
1118                 /* Resetting PHY cause problem on some chip... (SEEQ 80221) */
1119                 do_phy_reset = 0;
1120         }
1121         if (do_phy_reset) {
1122                 int timeout;
1123                 tc_mdio_write(dev, pid, MII_BMCR, BMCR_RESET);
1124                 timeout = 100;
1125                 while (--timeout) {
1126                         if (!(tc_mdio_read(dev, pid, MII_BMCR) & BMCR_RESET))
1127                                 break;
1128                         udelay(1);
1129                 }
1130                 if (!timeout)
1131                         printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
1132         }
1133
1134         tc35815_chip_reset(dev);
1135         tc35815_clear_queues(dev);
1136         tc35815_chip_init(dev);
1137         /* Reconfigure CAM again since tc35815_chip_init() initialize it. */
1138         tc35815_set_multicast_list(dev);
1139 }
1140
1141 static void tc35815_tx_timeout(struct net_device *dev)
1142 {
1143         struct tc35815_local *lp = dev->priv;
1144         struct tc35815_regs __iomem *tr =
1145                 (struct tc35815_regs __iomem *)dev->base_addr;
1146
1147         printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
1148                dev->name, tc_readl(&tr->Tx_Stat));
1149
1150         /* Try to restart the adaptor. */
1151         spin_lock_irq(&lp->lock);
1152         tc35815_restart(dev);
1153         spin_unlock_irq(&lp->lock);
1154
1155         lp->stats.tx_errors++;
1156
1157         /* If we have space available to accept new transmit
1158          * requests, wake up the queueing layer.  This would
1159          * be the case if the chipset_init() call above just
1160          * flushes out the tx queue and empties it.
1161          *
1162          * If instead, the tx queue is retained then the
1163          * netif_wake_queue() call should be placed in the
1164          * TX completion interrupt handler of the driver instead
1165          * of here.
1166          */
1167         if (!tc35815_tx_full(dev))
1168                 netif_wake_queue(dev);
1169 }
1170
1171 /*
1172  * Open/initialize the board. This is called (in the current kernel)
1173  * sometime after booting when the 'ifconfig' program is run.
1174  *
1175  * This routine should set everything up anew at each open, even
1176  * registers that "should" only need to be set once at boot, so that
1177  * there is non-reboot way to recover if something goes wrong.
1178  */
1179 static int
1180 tc35815_open(struct net_device *dev)
1181 {
1182         struct tc35815_local *lp = dev->priv;
1183
1184         /*
1185          * This is used if the interrupt line can turned off (shared).
1186          * See 3c503.c for an example of selecting the IRQ at config-time.
1187          */
1188         if (request_irq(dev->irq, &tc35815_interrupt, IRQF_SHARED, dev->name, dev)) {
1189                 return -EAGAIN;
1190         }
1191
1192         del_timer(&lp->timer);          /* Kill if running      */
1193         tc35815_chip_reset(dev);
1194
1195         if (tc35815_init_queues(dev) != 0) {
1196                 free_irq(dev->irq, dev);
1197                 return -EAGAIN;
1198         }
1199
1200         /* Reset the hardware here. Don't forget to set the station address. */
1201         spin_lock_irq(&lp->lock);
1202         tc35815_chip_init(dev);
1203         spin_unlock_irq(&lp->lock);
1204
1205         /* We are now ready to accept transmit requeusts from
1206          * the queueing layer of the networking.
1207          */
1208         netif_start_queue(dev);
1209
1210         return 0;
1211 }
1212
1213 /* This will only be invoked if your driver is _not_ in XOFF state.
1214  * What this means is that you need not check it, and that this
1215  * invariant will hold if you make sure that the netif_*_queue()
1216  * calls are done at the proper times.
1217  */
1218 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
1219 {
1220         struct tc35815_local *lp = dev->priv;
1221         struct TxFD *txfd;
1222         unsigned long flags;
1223
1224         /* If some error occurs while trying to transmit this
1225          * packet, you should return '1' from this function.
1226          * In such a case you _may not_ do anything to the
1227          * SKB, it is still owned by the network queueing
1228          * layer when an error is returned.  This means you
1229          * may not modify any SKB fields, you may not free
1230          * the SKB, etc.
1231          */
1232
1233         /* This is the most common case for modern hardware.
1234          * The spinlock protects this code from the TX complete
1235          * hardware interrupt handler.  Queue flow control is
1236          * thus managed under this lock as well.
1237          */
1238         spin_lock_irqsave(&lp->lock, flags);
1239
1240         /* failsafe... (handle txdone now if half of FDs are used) */
1241         if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
1242             TX_FD_NUM / 2)
1243                 tc35815_txdone(dev);
1244
1245         if (netif_msg_pktdata(lp))
1246                 print_eth(skb->data);
1247 #ifdef DEBUG
1248         if (lp->tx_skbs[lp->tfd_start].skb) {
1249                 printk("%s: tx_skbs conflict.\n", dev->name);
1250                 panic_queues(dev);
1251         }
1252 #else
1253         BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
1254 #endif
1255         lp->tx_skbs[lp->tfd_start].skb = skb;
1256         lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1257
1258         /*add to ring */
1259         txfd = &lp->tfd_base[lp->tfd_start];
1260         txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
1261         txfd->bd.BDCtl = cpu_to_le32(skb->len);
1262         txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
1263         txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
1264
1265         if (lp->tfd_start == lp->tfd_end) {
1266                 struct tc35815_regs __iomem *tr =
1267                         (struct tc35815_regs __iomem *)dev->base_addr;
1268                 /* Start DMA Transmitter. */
1269                 txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1270 #ifdef GATHER_TXINT
1271                 txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1272 #endif
1273                 if (netif_msg_tx_queued(lp)) {
1274                         printk("%s: starting TxFD.\n", dev->name);
1275                         dump_txfd(txfd);
1276                 }
1277                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1278         } else {
1279                 txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
1280                 if (netif_msg_tx_queued(lp)) {
1281                         printk("%s: queueing TxFD.\n", dev->name);
1282                         dump_txfd(txfd);
1283                 }
1284         }
1285         lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
1286
1287         dev->trans_start = jiffies;
1288
1289         /* If we just used up the very last entry in the
1290          * TX ring on this device, tell the queueing
1291          * layer to send no more.
1292          */
1293         if (tc35815_tx_full(dev)) {
1294                 if (netif_msg_tx_queued(lp))
1295                         printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
1296                 netif_stop_queue(dev);
1297         }
1298
1299         /* When the TX completion hw interrupt arrives, this
1300          * is when the transmit statistics are updated.
1301          */
1302
1303         spin_unlock_irqrestore(&lp->lock, flags);
1304         return 0;
1305 }
1306
1307 #define FATAL_ERROR_INT \
1308         (Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
1309 static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
1310 {
1311         static int count;
1312         printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
1313                dev->name, status);
1314         if (status & Int_IntPCI)
1315                 printk(" IntPCI");
1316         if (status & Int_DmParErr)
1317                 printk(" DmParErr");
1318         if (status & Int_IntNRAbt)
1319                 printk(" IntNRAbt");
1320         printk("\n");
1321         if (count++ > 100)
1322                 panic("%s: Too many fatal errors.", dev->name);
1323         printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
1324         /* Try to restart the adaptor. */
1325         tc35815_restart(dev);
1326 }
1327
1328 #ifdef TC35815_NAPI
1329 static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
1330 #else
1331 static int tc35815_do_interrupt(struct net_device *dev, u32 status)
1332 #endif
1333 {
1334         struct tc35815_local *lp = dev->priv;
1335         struct tc35815_regs __iomem *tr =
1336                 (struct tc35815_regs __iomem *)dev->base_addr;
1337         int ret = -1;
1338
1339         /* Fatal errors... */
1340         if (status & FATAL_ERROR_INT) {
1341                 tc35815_fatal_error_interrupt(dev, status);
1342                 return 0;
1343         }
1344         /* recoverable errors */
1345         if (status & Int_IntFDAEx) {
1346                 /* disable FDAEx int. (until we make rooms...) */
1347                 tc_writel(tc_readl(&tr->Int_En) & ~Int_FDAExEn, &tr->Int_En);
1348                 printk(KERN_WARNING
1349                        "%s: Free Descriptor Area Exhausted (%#x).\n",
1350                        dev->name, status);
1351                 lp->stats.rx_dropped++;
1352                 ret = 0;
1353         }
1354         if (status & Int_IntBLEx) {
1355                 /* disable BLEx int. (until we make rooms...) */
1356                 tc_writel(tc_readl(&tr->Int_En) & ~Int_BLExEn, &tr->Int_En);
1357                 printk(KERN_WARNING
1358                        "%s: Buffer List Exhausted (%#x).\n",
1359                        dev->name, status);
1360                 lp->stats.rx_dropped++;
1361                 ret = 0;
1362         }
1363         if (status & Int_IntExBD) {
1364                 printk(KERN_WARNING
1365                        "%s: Excessive Buffer Descriptiors (%#x).\n",
1366                        dev->name, status);
1367                 lp->stats.rx_length_errors++;
1368                 ret = 0;
1369         }
1370
1371         /* normal notification */
1372         if (status & Int_IntMacRx) {
1373                 /* Got a packet(s). */
1374 #ifdef TC35815_NAPI
1375                 ret = tc35815_rx(dev, limit);
1376 #else
1377                 tc35815_rx(dev);
1378                 ret = 0;
1379 #endif
1380                 lp->lstats.rx_ints++;
1381         }
1382         if (status & Int_IntMacTx) {
1383                 /* Transmit complete. */
1384                 lp->lstats.tx_ints++;
1385                 tc35815_txdone(dev);
1386                 netif_wake_queue(dev);
1387                 ret = 0;
1388         }
1389         return ret;
1390 }
1391
1392 /*
1393  * The typical workload of the driver:
1394  * Handle the network interface interrupts.
1395  */
1396 static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
1397 {
1398         struct net_device *dev = dev_id;
1399         struct tc35815_regs __iomem *tr =
1400                 (struct tc35815_regs __iomem *)dev->base_addr;
1401 #ifdef TC35815_NAPI
1402         u32 dmactl = tc_readl(&tr->DMA_Ctl);
1403
1404         if (!(dmactl & DMA_IntMask)) {
1405                 /* disable interrupts */
1406                 tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
1407                 if (netif_rx_schedule_prep(dev))
1408                         __netif_rx_schedule(dev);
1409                 else {
1410                         printk(KERN_ERR "%s: interrupt taken in poll\n",
1411                                dev->name);
1412                         BUG();
1413                 }
1414                 (void)tc_readl(&tr->Int_Src);   /* flush */
1415                 return IRQ_HANDLED;
1416         }
1417         return IRQ_NONE;
1418 #else
1419         struct tc35815_local *lp = dev->priv;
1420         int handled;
1421         u32 status;
1422
1423         spin_lock(&lp->lock);
1424         status = tc_readl(&tr->Int_Src);
1425         tc_writel(status, &tr->Int_Src);        /* write to clear */
1426         handled = tc35815_do_interrupt(dev, status);
1427         (void)tc_readl(&tr->Int_Src);   /* flush */
1428         spin_unlock(&lp->lock);
1429         return IRQ_RETVAL(handled >= 0);
1430 #endif /* TC35815_NAPI */
1431 }
1432
1433 #ifdef CONFIG_NET_POLL_CONTROLLER
1434 static void tc35815_poll_controller(struct net_device *dev)
1435 {
1436         disable_irq(dev->irq);
1437         tc35815_interrupt(dev->irq, dev);
1438         enable_irq(dev->irq);
1439 }
1440 #endif
1441
1442 /* We have a good packet(s), get it/them out of the buffers. */
1443 #ifdef TC35815_NAPI
1444 static int
1445 tc35815_rx(struct net_device *dev, int limit)
1446 #else
1447 static void
1448 tc35815_rx(struct net_device *dev)
1449 #endif
1450 {
1451         struct tc35815_local *lp = dev->priv;
1452         unsigned int fdctl;
1453         int i;
1454         int buf_free_count = 0;
1455         int fd_free_count = 0;
1456 #ifdef TC35815_NAPI
1457         int received = 0;
1458 #endif
1459
1460         while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
1461                 int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
1462                 int pkt_len = fdctl & FD_FDLength_MASK;
1463                 int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1464 #ifdef DEBUG
1465                 struct RxFD *next_rfd;
1466 #endif
1467 #if (RX_CTL_CMD & Rx_StripCRC) == 0
1468                 pkt_len -= 4;
1469 #endif
1470
1471                 if (netif_msg_rx_status(lp))
1472                         dump_rxfd(lp->rfd_cur);
1473                 if (status & Rx_Good) {
1474                         struct sk_buff *skb;
1475                         unsigned char *data;
1476                         int cur_bd;
1477 #ifdef TC35815_USE_PACKEDBUFFER
1478                         int offset;
1479 #endif
1480
1481 #ifdef TC35815_NAPI
1482                         if (--limit < 0)
1483                                 break;
1484 #endif
1485 #ifdef TC35815_USE_PACKEDBUFFER
1486                         BUG_ON(bd_count > 2);
1487                         skb = dev_alloc_skb(pkt_len + 2); /* +2: for reserve */
1488                         if (skb == NULL) {
1489                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
1490                                        dev->name);
1491                                 lp->stats.rx_dropped++;
1492                                 break;
1493                         }
1494                         skb_reserve(skb, 2);   /* 16 bit alignment */
1495
1496                         data = skb_put(skb, pkt_len);
1497
1498                         /* copy from receive buffer */
1499                         cur_bd = 0;
1500                         offset = 0;
1501                         while (offset < pkt_len && cur_bd < bd_count) {
1502                                 int len = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BDCtl) &
1503                                         BD_BuffLength_MASK;
1504                                 dma_addr_t dma = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BuffData);
1505                                 void *rxbuf = rxbuf_bus_to_virt(lp, dma);
1506                                 if (offset + len > pkt_len)
1507                                         len = pkt_len - offset;
1508 #ifdef TC35815_DMA_SYNC_ONDEMAND
1509                                 pci_dma_sync_single_for_cpu(lp->pci_dev,
1510                                                             dma, len,
1511                                                             PCI_DMA_FROMDEVICE);
1512 #endif
1513                                 memcpy(data + offset, rxbuf, len);
1514 #ifdef TC35815_DMA_SYNC_ONDEMAND
1515                                 pci_dma_sync_single_for_device(lp->pci_dev,
1516                                                                dma, len,
1517                                                                PCI_DMA_FROMDEVICE);
1518 #endif
1519                                 offset += len;
1520                                 cur_bd++;
1521                         }
1522 #else /* TC35815_USE_PACKEDBUFFER */
1523                         BUG_ON(bd_count > 1);
1524                         cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
1525                                   & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1526 #ifdef DEBUG
1527                         if (cur_bd >= RX_BUF_NUM) {
1528                                 printk("%s: invalid BDID.\n", dev->name);
1529                                 panic_queues(dev);
1530                         }
1531                         BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
1532                                (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
1533                         if (!lp->rx_skbs[cur_bd].skb) {
1534                                 printk("%s: NULL skb.\n", dev->name);
1535                                 panic_queues(dev);
1536                         }
1537 #else
1538                         BUG_ON(cur_bd >= RX_BUF_NUM);
1539 #endif
1540                         skb = lp->rx_skbs[cur_bd].skb;
1541                         prefetch(skb->data);
1542                         lp->rx_skbs[cur_bd].skb = NULL;
1543                         lp->fbl_count--;
1544                         pci_unmap_single(lp->pci_dev,
1545                                          lp->rx_skbs[cur_bd].skb_dma,
1546                                          RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1547                         if (!HAVE_DMA_RXALIGN(lp))
1548                                 memmove(skb->data, skb->data - 2, pkt_len);
1549                         data = skb_put(skb, pkt_len);
1550 #endif /* TC35815_USE_PACKEDBUFFER */
1551                         if (netif_msg_pktdata(lp))
1552                                 print_eth(data);
1553                         skb->protocol = eth_type_trans(skb, dev);
1554 #ifdef TC35815_NAPI
1555                         netif_receive_skb(skb);
1556                         received++;
1557 #else
1558                         netif_rx(skb);
1559 #endif
1560                         dev->last_rx = jiffies;
1561                         lp->stats.rx_packets++;
1562                         lp->stats.rx_bytes += pkt_len;
1563                 } else {
1564                         lp->stats.rx_errors++;
1565                         printk(KERN_DEBUG "%s: Rx error (status %x)\n",
1566                                dev->name, status & Rx_Stat_Mask);
1567                         /* WORKAROUND: LongErr and CRCErr means Overflow. */
1568                         if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
1569                                 status &= ~(Rx_LongErr|Rx_CRCErr);
1570                                 status |= Rx_Over;
1571                         }
1572                         if (status & Rx_LongErr) lp->stats.rx_length_errors++;
1573                         if (status & Rx_Over) lp->stats.rx_fifo_errors++;
1574                         if (status & Rx_CRCErr) lp->stats.rx_crc_errors++;
1575                         if (status & Rx_Align) lp->stats.rx_frame_errors++;
1576                 }
1577
1578                 if (bd_count > 0) {
1579                         /* put Free Buffer back to controller */
1580                         int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
1581                         unsigned char id =
1582                                 (bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1583 #ifdef DEBUG
1584                         if (id >= RX_BUF_NUM) {
1585                                 printk("%s: invalid BDID.\n", dev->name);
1586                                 panic_queues(dev);
1587                         }
1588 #else
1589                         BUG_ON(id >= RX_BUF_NUM);
1590 #endif
1591                         /* free old buffers */
1592 #ifdef TC35815_USE_PACKEDBUFFER
1593                         while (lp->fbl_curid != id)
1594 #else
1595                         while (lp->fbl_count < RX_BUF_NUM)
1596 #endif
1597                         {
1598 #ifdef TC35815_USE_PACKEDBUFFER
1599                                 unsigned char curid = lp->fbl_curid;
1600 #else
1601                                 unsigned char curid =
1602                                         (id + 1 + lp->fbl_count) % RX_BUF_NUM;
1603 #endif
1604                                 struct BDesc *bd = &lp->fbl_ptr->bd[curid];
1605 #ifdef DEBUG
1606                                 bdctl = le32_to_cpu(bd->BDCtl);
1607                                 if (bdctl & BD_CownsBD) {
1608                                         printk("%s: Freeing invalid BD.\n",
1609                                                dev->name);
1610                                         panic_queues(dev);
1611                                 }
1612 #endif
1613                                 /* pass BD to controler */
1614 #ifndef TC35815_USE_PACKEDBUFFER
1615                                 if (!lp->rx_skbs[curid].skb) {
1616                                         lp->rx_skbs[curid].skb =
1617                                                 alloc_rxbuf_skb(dev,
1618                                                                 lp->pci_dev,
1619                                                                 &lp->rx_skbs[curid].skb_dma);
1620                                         if (!lp->rx_skbs[curid].skb)
1621                                                 break; /* try on next reception */
1622                                         bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
1623                                 }
1624 #endif /* TC35815_USE_PACKEDBUFFER */
1625                                 /* Note: BDLength was modified by chip. */
1626                                 bd->BDCtl = cpu_to_le32(BD_CownsBD |
1627                                                         (curid << BD_RxBDID_SHIFT) |
1628                                                         RX_BUF_SIZE);
1629 #ifdef TC35815_USE_PACKEDBUFFER
1630                                 lp->fbl_curid = (curid + 1) % RX_BUF_NUM;
1631                                 if (netif_msg_rx_status(lp)) {
1632                                         printk("%s: Entering new FBD %d\n",
1633                                                dev->name, lp->fbl_curid);
1634                                         dump_frfd(lp->fbl_ptr);
1635                                 }
1636 #else
1637                                 lp->fbl_count++;
1638 #endif
1639                                 buf_free_count++;
1640                         }
1641                 }
1642
1643                 /* put RxFD back to controller */
1644 #ifdef DEBUG
1645                 next_rfd = fd_bus_to_virt(lp,
1646                                           le32_to_cpu(lp->rfd_cur->fd.FDNext));
1647                 if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
1648                         printk("%s: RxFD FDNext invalid.\n", dev->name);
1649                         panic_queues(dev);
1650                 }
1651 #endif
1652                 for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
1653                         /* pass FD to controler */
1654 #ifdef DEBUG
1655                         lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
1656 #else
1657                         lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
1658 #endif
1659                         lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
1660                         lp->rfd_cur++;
1661                         fd_free_count++;
1662                 }
1663                 if (lp->rfd_cur > lp->rfd_limit)
1664                         lp->rfd_cur = lp->rfd_base;
1665 #ifdef DEBUG
1666                 if (lp->rfd_cur != next_rfd)
1667                         printk("rfd_cur = %p, next_rfd %p\n",
1668                                lp->rfd_cur, next_rfd);
1669 #endif
1670         }
1671
1672         /* re-enable BL/FDA Exhaust interrupts. */
1673         if (fd_free_count) {
1674                 struct tc35815_regs __iomem *tr =
1675                         (struct tc35815_regs __iomem *)dev->base_addr;
1676                 u32 en, en_old = tc_readl(&tr->Int_En);
1677                 en = en_old | Int_FDAExEn;
1678                 if (buf_free_count)
1679                         en |= Int_BLExEn;
1680                 if (en != en_old)
1681                         tc_writel(en, &tr->Int_En);
1682         }
1683 #ifdef TC35815_NAPI
1684         return received;
1685 #endif
1686 }
1687
1688 #ifdef TC35815_NAPI
1689 static int
1690 tc35815_poll(struct net_device *dev, int *budget)
1691 {
1692         struct tc35815_local *lp = dev->priv;
1693         struct tc35815_regs __iomem *tr =
1694                 (struct tc35815_regs __iomem *)dev->base_addr;
1695         int limit = min(*budget, dev->quota);
1696         int received = 0, handled;
1697         u32 status;
1698
1699         spin_lock(&lp->lock);
1700         status = tc_readl(&tr->Int_Src);
1701         do {
1702                 tc_writel(status, &tr->Int_Src);        /* write to clear */
1703
1704                 handled = tc35815_do_interrupt(dev, status, limit);
1705                 if (handled >= 0) {
1706                         received += handled;
1707                         limit -= handled;
1708                         if (limit <= 0)
1709                                 break;
1710                 }
1711                 status = tc_readl(&tr->Int_Src);
1712         } while (status);
1713         spin_unlock(&lp->lock);
1714
1715         dev->quota -= received;
1716         *budget -= received;
1717         if (limit <= 0)
1718                 return 1;
1719
1720         netif_rx_complete(dev);
1721         /* enable interrupts */
1722         tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
1723         return 0;
1724 }
1725 #endif
1726
1727 #ifdef NO_CHECK_CARRIER
1728 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1729 #else
1730 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1731 #endif
1732
1733 static void
1734 tc35815_check_tx_stat(struct net_device *dev, int status)
1735 {
1736         struct tc35815_local *lp = dev->priv;
1737         const char *msg = NULL;
1738
1739         /* count collisions */
1740         if (status & Tx_ExColl)
1741                 lp->stats.collisions += 16;
1742         if (status & Tx_TxColl_MASK)
1743                 lp->stats.collisions += status & Tx_TxColl_MASK;
1744
1745 #ifndef NO_CHECK_CARRIER
1746         /* TX4939 does not have NCarr */
1747         if (lp->boardtype == TC35815_TX4939)
1748                 status &= ~Tx_NCarr;
1749 #ifdef WORKAROUND_LOSTCAR
1750         /* WORKAROUND: ignore LostCrS in full duplex operation */
1751         if ((lp->timer_state != asleep && lp->timer_state != lcheck)
1752             || lp->fullduplex)
1753                 status &= ~Tx_NCarr;
1754 #endif
1755 #endif
1756
1757         if (!(status & TX_STA_ERR)) {
1758                 /* no error. */
1759                 lp->stats.tx_packets++;
1760                 return;
1761         }
1762
1763         lp->stats.tx_errors++;
1764         if (status & Tx_ExColl) {
1765                 lp->stats.tx_aborted_errors++;
1766                 msg = "Excessive Collision.";
1767         }
1768         if (status & Tx_Under) {
1769                 lp->stats.tx_fifo_errors++;
1770                 msg = "Tx FIFO Underrun.";
1771                 if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
1772                         lp->lstats.tx_underrun++;
1773                         if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
1774                                 struct tc35815_regs __iomem *tr =
1775                                         (struct tc35815_regs __iomem *)dev->base_addr;
1776                                 tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
1777                                 msg = "Tx FIFO Underrun.Change Tx threshold to max.";
1778                         }
1779                 }
1780         }
1781         if (status & Tx_Defer) {
1782                 lp->stats.tx_fifo_errors++;
1783                 msg = "Excessive Deferral.";
1784         }
1785 #ifndef NO_CHECK_CARRIER
1786         if (status & Tx_NCarr) {
1787                 lp->stats.tx_carrier_errors++;
1788                 msg = "Lost Carrier Sense.";
1789         }
1790 #endif
1791         if (status & Tx_LateColl) {
1792                 lp->stats.tx_aborted_errors++;
1793                 msg = "Late Collision.";
1794         }
1795         if (status & Tx_TxPar) {
1796                 lp->stats.tx_fifo_errors++;
1797                 msg = "Transmit Parity Error.";
1798         }
1799         if (status & Tx_SQErr) {
1800                 lp->stats.tx_heartbeat_errors++;
1801                 msg = "Signal Quality Error.";
1802         }
1803         if (msg && netif_msg_tx_err(lp))
1804                 printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
1805 }
1806
1807 /* This handles TX complete events posted by the device
1808  * via interrupts.
1809  */
1810 static void
1811 tc35815_txdone(struct net_device *dev)
1812 {
1813         struct tc35815_local *lp = dev->priv;
1814         struct TxFD *txfd;
1815         unsigned int fdctl;
1816
1817         txfd = &lp->tfd_base[lp->tfd_end];
1818         while (lp->tfd_start != lp->tfd_end &&
1819                !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
1820                 int status = le32_to_cpu(txfd->fd.FDStat);
1821                 struct sk_buff *skb;
1822                 unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
1823                 u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
1824
1825                 if (netif_msg_tx_done(lp)) {
1826                         printk("%s: complete TxFD.\n", dev->name);
1827                         dump_txfd(txfd);
1828                 }
1829                 tc35815_check_tx_stat(dev, status);
1830
1831                 skb = fdsystem != 0xffffffff ?
1832                         lp->tx_skbs[fdsystem].skb : NULL;
1833 #ifdef DEBUG
1834                 if (lp->tx_skbs[lp->tfd_end].skb != skb) {
1835                         printk("%s: tx_skbs mismatch.\n", dev->name);
1836                         panic_queues(dev);
1837                 }
1838 #else
1839                 BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
1840 #endif
1841                 if (skb) {
1842                         lp->stats.tx_bytes += skb->len;
1843                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
1844                         lp->tx_skbs[lp->tfd_end].skb = NULL;
1845                         lp->tx_skbs[lp->tfd_end].skb_dma = 0;
1846 #ifdef TC35815_NAPI
1847                         dev_kfree_skb_any(skb);
1848 #else
1849                         dev_kfree_skb_irq(skb);
1850 #endif
1851                 }
1852                 txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
1853
1854                 lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
1855                 txfd = &lp->tfd_base[lp->tfd_end];
1856 #ifdef DEBUG
1857                 if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
1858                         printk("%s: TxFD FDNext invalid.\n", dev->name);
1859                         panic_queues(dev);
1860                 }
1861 #endif
1862                 if (fdnext & FD_Next_EOL) {
1863                         /* DMA Transmitter has been stopping... */
1864                         if (lp->tfd_end != lp->tfd_start) {
1865                                 struct tc35815_regs __iomem *tr =
1866                                         (struct tc35815_regs __iomem *)dev->base_addr;
1867                                 int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
1868                                 struct TxFD* txhead = &lp->tfd_base[head];
1869                                 int qlen = (lp->tfd_start + TX_FD_NUM
1870                                             - lp->tfd_end) % TX_FD_NUM;
1871
1872 #ifdef DEBUG
1873                                 if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
1874                                         printk("%s: TxFD FDCtl invalid.\n", dev->name);
1875                                         panic_queues(dev);
1876                                 }
1877 #endif
1878                                 /* log max queue length */
1879                                 if (lp->lstats.max_tx_qlen < qlen)
1880                                         lp->lstats.max_tx_qlen = qlen;
1881
1882
1883                                 /* start DMA Transmitter again */
1884                                 txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1885 #ifdef GATHER_TXINT
1886                                 txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1887 #endif
1888                                 if (netif_msg_tx_queued(lp)) {
1889                                         printk("%s: start TxFD on queue.\n",
1890                                                dev->name);
1891                                         dump_txfd(txfd);
1892                                 }
1893                                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1894                         }
1895                         break;
1896                 }
1897         }
1898
1899         /* If we had stopped the queue due to a "tx full"
1900          * condition, and space has now been made available,
1901          * wake up the queue.
1902          */
1903         if (netif_queue_stopped(dev) && ! tc35815_tx_full(dev))
1904                 netif_wake_queue(dev);
1905 }
1906
1907 /* The inverse routine to tc35815_open(). */
1908 static int
1909 tc35815_close(struct net_device *dev)
1910 {
1911         struct tc35815_local *lp = dev->priv;
1912         netif_stop_queue(dev);
1913
1914         /* Flush the Tx and disable Rx here. */
1915
1916         del_timer(&lp->timer);          /* Kill if running      */
1917         tc35815_chip_reset(dev);
1918         free_irq(dev->irq, dev);
1919
1920         tc35815_free_queues(dev);
1921
1922         return 0;
1923
1924 }
1925
1926 /*
1927  * Get the current statistics.
1928  * This may be called with the card open or closed.
1929  */
1930 static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
1931 {
1932         struct tc35815_local *lp = dev->priv;
1933         struct tc35815_regs __iomem *tr =
1934                 (struct tc35815_regs __iomem *)dev->base_addr;
1935         if (netif_running(dev)) {
1936                 /* Update the statistics from the device registers. */
1937                 lp->stats.rx_missed_errors = tc_readl(&tr->Miss_Cnt);
1938         }
1939
1940         return &lp->stats;
1941 }
1942
1943 static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
1944 {
1945         struct tc35815_local *lp = dev->priv;
1946         struct tc35815_regs __iomem *tr =
1947                 (struct tc35815_regs __iomem *)dev->base_addr;
1948         int cam_index = index * 6;
1949         u32 cam_data;
1950         u32 saved_addr;
1951         saved_addr = tc_readl(&tr->CAM_Adr);
1952
1953         if (netif_msg_hw(lp)) {
1954                 int i;
1955                 printk(KERN_DEBUG "%s: CAM %d:", dev->name, index);
1956                 for (i = 0; i < 6; i++)
1957                         printk(" %02x", addr[i]);
1958                 printk("\n");
1959         }
1960         if (index & 1) {
1961                 /* read modify write */
1962                 tc_writel(cam_index - 2, &tr->CAM_Adr);
1963                 cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
1964                 cam_data |= addr[0] << 8 | addr[1];
1965                 tc_writel(cam_data, &tr->CAM_Data);
1966                 /* write whole word */
1967                 tc_writel(cam_index + 2, &tr->CAM_Adr);
1968                 cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
1969                 tc_writel(cam_data, &tr->CAM_Data);
1970         } else {
1971                 /* write whole word */
1972                 tc_writel(cam_index, &tr->CAM_Adr);
1973                 cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
1974                 tc_writel(cam_data, &tr->CAM_Data);
1975                 /* read modify write */
1976                 tc_writel(cam_index + 4, &tr->CAM_Adr);
1977                 cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
1978                 cam_data |= addr[4] << 24 | (addr[5] << 16);
1979                 tc_writel(cam_data, &tr->CAM_Data);
1980         }
1981
1982         tc_writel(saved_addr, &tr->CAM_Adr);
1983 }
1984
1985
1986 /*
1987  * Set or clear the multicast filter for this adaptor.
1988  * num_addrs == -1      Promiscuous mode, receive all packets
1989  * num_addrs == 0       Normal mode, clear multicast list
1990  * num_addrs > 0        Multicast mode, receive normal and MC packets,
1991  *                      and do best-effort filtering.
1992  */
1993 static void
1994 tc35815_set_multicast_list(struct net_device *dev)
1995 {
1996         struct tc35815_regs __iomem *tr =
1997                 (struct tc35815_regs __iomem *)dev->base_addr;
1998
1999         if (dev->flags&IFF_PROMISC)
2000         {
2001 #ifdef WORKAROUND_100HALF_PROMISC
2002                 /* With some (all?) 100MHalf HUB, controller will hang
2003                  * if we enabled promiscuous mode before linkup... */
2004                 struct tc35815_local *lp = dev->priv;
2005                 int pid = lp->phy_addr;
2006                 if (!(tc_mdio_read(dev, pid, MII_BMSR) & BMSR_LSTATUS))
2007                         return;
2008 #endif
2009                 /* Enable promiscuous mode */
2010                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
2011         }
2012         else if((dev->flags&IFF_ALLMULTI) || dev->mc_count > CAM_ENTRY_MAX - 3)
2013         {
2014                 /* CAM 0, 1, 20 are reserved. */
2015                 /* Disable promiscuous mode, use normal mode. */
2016                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
2017         }
2018         else if(dev->mc_count)
2019         {
2020                 struct dev_mc_list* cur_addr = dev->mc_list;
2021                 int i;
2022                 int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
2023
2024                 tc_writel(0, &tr->CAM_Ctl);
2025                 /* Walk the address list, and load the filter */
2026                 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
2027                         if (!cur_addr)
2028                                 break;
2029                         /* entry 0,1 is reserved. */
2030                         tc35815_set_cam_entry(dev, i + 2, cur_addr->dmi_addr);
2031                         ena_bits |= CAM_Ena_Bit(i + 2);
2032                 }
2033                 tc_writel(ena_bits, &tr->CAM_Ena);
2034                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2035         }
2036         else {
2037                 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2038                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2039         }
2040 }
2041
2042 static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2043 {
2044         struct tc35815_local *lp = dev->priv;
2045         strcpy(info->driver, MODNAME);
2046         strcpy(info->version, DRV_VERSION);
2047         strcpy(info->bus_info, pci_name(lp->pci_dev));
2048 }
2049
2050 static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2051 {
2052         struct tc35815_local *lp = dev->priv;
2053         spin_lock_irq(&lp->lock);
2054         mii_ethtool_gset(&lp->mii, cmd);
2055         spin_unlock_irq(&lp->lock);
2056         return 0;
2057 }
2058
2059 static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2060 {
2061         struct tc35815_local *lp = dev->priv;
2062         int rc;
2063 #if 1   /* use our negotiation method... */
2064         /* Verify the settings we care about. */
2065         if (cmd->autoneg != AUTONEG_ENABLE &&
2066             cmd->autoneg != AUTONEG_DISABLE)
2067                 return -EINVAL;
2068         if (cmd->autoneg == AUTONEG_DISABLE &&
2069             ((cmd->speed != SPEED_100 &&
2070               cmd->speed != SPEED_10) ||
2071              (cmd->duplex != DUPLEX_HALF &&
2072               cmd->duplex != DUPLEX_FULL)))
2073                 return -EINVAL;
2074
2075         /* Ok, do it to it. */
2076         spin_lock_irq(&lp->lock);
2077         del_timer(&lp->timer);
2078         tc35815_start_auto_negotiation(dev, cmd);
2079         spin_unlock_irq(&lp->lock);
2080         rc = 0;
2081 #else
2082         spin_lock_irq(&lp->lock);
2083         rc = mii_ethtool_sset(&lp->mii, cmd);
2084         spin_unlock_irq(&lp->lock);
2085 #endif
2086         return rc;
2087 }
2088
2089 static int tc35815_nway_reset(struct net_device *dev)
2090 {
2091         struct tc35815_local *lp = dev->priv;
2092         int rc;
2093         spin_lock_irq(&lp->lock);
2094         rc = mii_nway_restart(&lp->mii);
2095         spin_unlock_irq(&lp->lock);
2096         return rc;
2097 }
2098
2099 static u32 tc35815_get_link(struct net_device *dev)
2100 {
2101         struct tc35815_local *lp = dev->priv;
2102         int rc;
2103         spin_lock_irq(&lp->lock);
2104         rc = mii_link_ok(&lp->mii);
2105         spin_unlock_irq(&lp->lock);
2106         return rc;
2107 }
2108
2109 static u32 tc35815_get_msglevel(struct net_device *dev)
2110 {
2111         struct tc35815_local *lp = dev->priv;
2112         return lp->msg_enable;
2113 }
2114
2115 static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
2116 {
2117         struct tc35815_local *lp = dev->priv;
2118         lp->msg_enable = datum;
2119 }
2120
2121 static int tc35815_get_stats_count(struct net_device *dev)
2122 {
2123         struct tc35815_local *lp = dev->priv;
2124         return sizeof(lp->lstats) / sizeof(int);
2125 }
2126
2127 static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2128 {
2129         struct tc35815_local *lp = dev->priv;
2130         data[0] = lp->lstats.max_tx_qlen;
2131         data[1] = lp->lstats.tx_ints;
2132         data[2] = lp->lstats.rx_ints;
2133         data[3] = lp->lstats.tx_underrun;
2134 }
2135
2136 static struct {
2137         const char str[ETH_GSTRING_LEN];
2138 } ethtool_stats_keys[] = {
2139         { "max_tx_qlen" },
2140         { "tx_ints" },
2141         { "rx_ints" },
2142         { "tx_underrun" },
2143 };
2144
2145 static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2146 {
2147         memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2148 }
2149
2150 static const struct ethtool_ops tc35815_ethtool_ops = {
2151         .get_drvinfo            = tc35815_get_drvinfo,
2152         .get_settings           = tc35815_get_settings,
2153         .set_settings           = tc35815_set_settings,
2154         .nway_reset             = tc35815_nway_reset,
2155         .get_link               = tc35815_get_link,
2156         .get_msglevel           = tc35815_get_msglevel,
2157         .set_msglevel           = tc35815_set_msglevel,
2158         .get_strings            = tc35815_get_strings,
2159         .get_stats_count        = tc35815_get_stats_count,
2160         .get_ethtool_stats      = tc35815_get_ethtool_stats,
2161         .get_perm_addr          = ethtool_op_get_perm_addr,
2162 };
2163
2164 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2165 {
2166         struct tc35815_local *lp = dev->priv;
2167         int rc;
2168
2169         if (!netif_running(dev))
2170                 return -EINVAL;
2171
2172         spin_lock_irq(&lp->lock);
2173         rc = generic_mii_ioctl(&lp->mii, if_mii(rq), cmd, NULL);
2174         spin_unlock_irq(&lp->lock);
2175
2176         return rc;
2177 }
2178
2179 static int tc_mdio_read(struct net_device *dev, int phy_id, int location)
2180 {
2181         struct tc35815_regs __iomem *tr =
2182                 (struct tc35815_regs __iomem *)dev->base_addr;
2183         u32 data;
2184         tc_writel(MD_CA_Busy | (phy_id << 5) | location, &tr->MD_CA);
2185         while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
2186                 ;
2187         data = tc_readl(&tr->MD_Data);
2188         return data & 0xffff;
2189 }
2190
2191 static void tc_mdio_write(struct net_device *dev, int phy_id, int location,
2192                           int val)
2193 {
2194         struct tc35815_regs __iomem *tr =
2195                 (struct tc35815_regs __iomem *)dev->base_addr;
2196         tc_writel(val, &tr->MD_Data);
2197         tc_writel(MD_CA_Busy | MD_CA_Wr | (phy_id << 5) | location, &tr->MD_CA);
2198         while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
2199                 ;
2200 }
2201
2202 /* Auto negotiation.  The scheme is very simple.  We have a timer routine
2203  * that keeps watching the auto negotiation process as it progresses.
2204  * The DP83840 is first told to start doing it's thing, we set up the time
2205  * and place the timer state machine in it's initial state.
2206  *
2207  * Here the timer peeks at the DP83840 status registers at each click to see
2208  * if the auto negotiation has completed, we assume here that the DP83840 PHY
2209  * will time out at some point and just tell us what (didn't) happen.  For
2210  * complete coverage we only allow so many of the ticks at this level to run,
2211  * when this has expired we print a warning message and try another strategy.
2212  * This "other" strategy is to force the interface into various speed/duplex
2213  * configurations and we stop when we see a link-up condition before the
2214  * maximum number of "peek" ticks have occurred.
2215  *
2216  * Once a valid link status has been detected we configure the BigMAC and
2217  * the rest of the Happy Meal to speak the most efficient protocol we could
2218  * get a clean link for.  The priority for link configurations, highest first
2219  * is:
2220  *                 100 Base-T Full Duplex
2221  *                 100 Base-T Half Duplex
2222  *                 10 Base-T Full Duplex
2223  *                 10 Base-T Half Duplex
2224  *
2225  * We start a new timer now, after a successful auto negotiation status has
2226  * been detected.  This timer just waits for the link-up bit to get set in
2227  * the BMCR of the DP83840.  When this occurs we print a kernel log message
2228  * describing the link type in use and the fact that it is up.
2229  *
2230  * If a fatal error of some sort is signalled and detected in the interrupt
2231  * service routine, and the chip is reset, or the link is ifconfig'd down
2232  * and then back up, this entire process repeats itself all over again.
2233  */
2234 /* Note: Above comments are come from sunhme driver. */
2235
2236 static int tc35815_try_next_permutation(struct net_device *dev)
2237 {
2238         struct tc35815_local *lp = dev->priv;
2239         int pid = lp->phy_addr;
2240         unsigned short bmcr;
2241
2242         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2243
2244         /* Downgrade from full to half duplex.  Only possible via ethtool.  */
2245         if (bmcr & BMCR_FULLDPLX) {
2246                 bmcr &= ~BMCR_FULLDPLX;
2247                 printk(KERN_DEBUG "%s: try next permutation (BMCR %x)\n", dev->name, bmcr);
2248                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2249                 return 0;
2250         }
2251
2252         /* Downgrade from 100 to 10. */
2253         if (bmcr & BMCR_SPEED100) {
2254                 bmcr &= ~BMCR_SPEED100;
2255                 printk(KERN_DEBUG "%s: try next permutation (BMCR %x)\n", dev->name, bmcr);
2256                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2257                 return 0;
2258         }
2259
2260         /* We've tried everything. */
2261         return -1;
2262 }
2263
2264 static void
2265 tc35815_display_link_mode(struct net_device *dev)
2266 {
2267         struct tc35815_local *lp = dev->priv;
2268         int pid = lp->phy_addr;
2269         unsigned short lpa, bmcr;
2270         char *speed = "", *duplex = "";
2271
2272         lpa = tc_mdio_read(dev, pid, MII_LPA);
2273         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2274         if (options.speed ? (bmcr & BMCR_SPEED100) : (lpa & (LPA_100HALF | LPA_100FULL)))
2275                 speed = "100Mb/s";
2276         else
2277                 speed = "10Mb/s";
2278         if (options.duplex ? (bmcr & BMCR_FULLDPLX) : (lpa & (LPA_100FULL | LPA_10FULL)))
2279                 duplex = "Full Duplex";
2280         else
2281                 duplex = "Half Duplex";
2282
2283         if (netif_msg_link(lp))
2284                 printk(KERN_INFO "%s: Link is up at %s, %s.\n",
2285                        dev->name, speed, duplex);
2286         printk(KERN_DEBUG "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
2287                dev->name,
2288                bmcr, tc_mdio_read(dev, pid, MII_BMSR), lpa);
2289 }
2290
2291 static void tc35815_display_forced_link_mode(struct net_device *dev)
2292 {
2293         struct tc35815_local *lp = dev->priv;
2294         int pid = lp->phy_addr;
2295         unsigned short bmcr;
2296         char *speed = "", *duplex = "";
2297
2298         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2299         if (bmcr & BMCR_SPEED100)
2300                 speed = "100Mb/s";
2301         else
2302                 speed = "10Mb/s";
2303         if (bmcr & BMCR_FULLDPLX)
2304                 duplex = "Full Duplex.\n";
2305         else
2306                 duplex = "Half Duplex.\n";
2307
2308         if (netif_msg_link(lp))
2309                 printk(KERN_INFO "%s: Link has been forced up at %s, %s",
2310                        dev->name, speed, duplex);
2311 }
2312
2313 static void tc35815_set_link_modes(struct net_device *dev)
2314 {
2315         struct tc35815_local *lp = dev->priv;
2316         struct tc35815_regs __iomem *tr =
2317                 (struct tc35815_regs __iomem *)dev->base_addr;
2318         int pid = lp->phy_addr;
2319         unsigned short bmcr, lpa;
2320         int speed;
2321
2322         if (lp->timer_state == arbwait) {
2323                 lpa = tc_mdio_read(dev, pid, MII_LPA);
2324                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2325                 printk(KERN_DEBUG "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
2326                        dev->name,
2327                        bmcr, tc_mdio_read(dev, pid, MII_BMSR), lpa);
2328                 if (!(lpa & (LPA_10HALF | LPA_10FULL |
2329                              LPA_100HALF | LPA_100FULL))) {
2330                         /* fall back to 10HALF */
2331                         printk(KERN_INFO "%s: bad ability %04x - falling back to 10HD.\n",
2332                                dev->name, lpa);
2333                         lpa = LPA_10HALF;
2334                 }
2335                 if (options.duplex ? (bmcr & BMCR_FULLDPLX) : (lpa & (LPA_100FULL | LPA_10FULL)))
2336                         lp->fullduplex = 1;
2337                 else
2338                         lp->fullduplex = 0;
2339                 if (options.speed ? (bmcr & BMCR_SPEED100) : (lpa & (LPA_100HALF | LPA_100FULL)))
2340                         speed = 100;
2341                 else
2342                         speed = 10;
2343         } else {
2344                 /* Forcing a link mode. */
2345                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2346                 if (bmcr & BMCR_FULLDPLX)
2347                         lp->fullduplex = 1;
2348                 else
2349                         lp->fullduplex = 0;
2350                 if (bmcr & BMCR_SPEED100)
2351                         speed = 100;
2352                 else
2353                         speed = 10;
2354         }
2355
2356         tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_HaltReq, &tr->MAC_Ctl);
2357         if (lp->fullduplex) {
2358                 tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_FullDup, &tr->MAC_Ctl);
2359         } else {
2360                 tc_writel(tc_readl(&tr->MAC_Ctl) & ~MAC_FullDup, &tr->MAC_Ctl);
2361         }
2362         tc_writel(tc_readl(&tr->MAC_Ctl) & ~MAC_HaltReq, &tr->MAC_Ctl);
2363
2364         /* TX4939 PCFG.SPEEDn bit will be changed on NETDEV_CHANGE event. */
2365
2366 #ifndef NO_CHECK_CARRIER
2367         /* TX4939 does not have EnLCarr */
2368         if (lp->boardtype != TC35815_TX4939) {
2369 #ifdef WORKAROUND_LOSTCAR
2370                 /* WORKAROUND: enable LostCrS only if half duplex operation */
2371                 if (!lp->fullduplex && lp->boardtype != TC35815_TX4939)
2372                         tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr, &tr->Tx_Ctl);
2373 #endif
2374         }
2375 #endif
2376         lp->mii.full_duplex = lp->fullduplex;
2377 }
2378
2379 static void tc35815_timer(unsigned long data)
2380 {
2381         struct net_device *dev = (struct net_device *)data;
2382         struct tc35815_local *lp = dev->priv;
2383         int pid = lp->phy_addr;
2384         unsigned short bmsr, bmcr, lpa;
2385         int restart_timer = 0;
2386
2387         spin_lock_irq(&lp->lock);
2388
2389         lp->timer_ticks++;
2390         switch (lp->timer_state) {
2391         case arbwait:
2392                 /*
2393                  * Only allow for 5 ticks, thats 10 seconds and much too
2394                  * long to wait for arbitration to complete.
2395                  */
2396                 /* TC35815 need more times... */
2397                 if (lp->timer_ticks >= 10) {
2398                         /* Enter force mode. */
2399                         if (!options.doforce) {
2400                                 printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful,"
2401                                        " cable probblem?\n", dev->name);
2402                                 /* Try to restart the adaptor. */
2403                                 tc35815_restart(dev);
2404                                 goto out;
2405                         }
2406                         printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful,"
2407                                " trying force link mode\n", dev->name);
2408                         printk(KERN_DEBUG "%s: BMCR %x BMSR %x\n", dev->name,
2409                                tc_mdio_read(dev, pid, MII_BMCR),
2410                                tc_mdio_read(dev, pid, MII_BMSR));
2411                         bmcr = BMCR_SPEED100;
2412                         tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2413
2414                         /*
2415                          * OK, seems we need do disable the transceiver
2416                          * for the first tick to make sure we get an
2417                          * accurate link state at the second tick.
2418                          */
2419
2420                         lp->timer_state = ltrywait;
2421                         lp->timer_ticks = 0;
2422                         restart_timer = 1;
2423                 } else {
2424                         /* Anything interesting happen? */
2425                         bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2426                         if (bmsr & BMSR_ANEGCOMPLETE) {
2427                                 /* Just what we've been waiting for... */
2428                                 tc35815_set_link_modes(dev);
2429
2430                                 /*
2431                                  * Success, at least so far, advance our state
2432                                  * engine.
2433                                  */
2434                                 lp->timer_state = lupwait;
2435                                 restart_timer = 1;
2436                         } else {
2437                                 restart_timer = 1;
2438                         }
2439                 }
2440                 break;
2441
2442         case lupwait:
2443                 /*
2444                  * Auto negotiation was successful and we are awaiting a
2445                  * link up status.  I have decided to let this timer run
2446                  * forever until some sort of error is signalled, reporting
2447                  * a message to the user at 10 second intervals.
2448                  */
2449                 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2450                 if (bmsr & BMSR_LSTATUS) {
2451                         /*
2452                          * Wheee, it's up, display the link mode in use and put
2453                          * the timer to sleep.
2454                          */
2455                         tc35815_display_link_mode(dev);
2456                         netif_carrier_on(dev);
2457 #ifdef WORKAROUND_100HALF_PROMISC
2458                         /* delayed promiscuous enabling */
2459                         if (dev->flags & IFF_PROMISC)
2460                                 tc35815_set_multicast_list(dev);
2461 #endif
2462 #if 1
2463                         lp->saved_lpa = tc_mdio_read(dev, pid, MII_LPA);
2464                         lp->timer_state = lcheck;
2465                         restart_timer = 1;
2466 #else
2467                         lp->timer_state = asleep;
2468                         restart_timer = 0;
2469 #endif
2470                 } else {
2471                         if (lp->timer_ticks >= 10) {
2472                                 printk(KERN_NOTICE "%s: Auto negotiation successful, link still "
2473                                        "not completely up.\n", dev->name);
2474                                 lp->timer_ticks = 0;
2475                                 restart_timer = 1;
2476                         } else {
2477                                 restart_timer = 1;
2478                         }
2479                 }
2480                 break;
2481
2482         case ltrywait:
2483                 /*
2484                  * Making the timeout here too long can make it take
2485                  * annoyingly long to attempt all of the link mode
2486                  * permutations, but then again this is essentially
2487                  * error recovery code for the most part.
2488                  */
2489                 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2490                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2491                 if (lp->timer_ticks == 1) {
2492                         /*
2493                          * Re-enable transceiver, we'll re-enable the
2494                          * transceiver next tick, then check link state
2495                          * on the following tick.
2496                          */
2497                         restart_timer = 1;
2498                         break;
2499                 }
2500                 if (lp->timer_ticks == 2) {
2501                         restart_timer = 1;
2502                         break;
2503                 }
2504                 if (bmsr & BMSR_LSTATUS) {
2505                         /* Force mode selection success. */
2506                         tc35815_display_forced_link_mode(dev);
2507                         netif_carrier_on(dev);
2508                         tc35815_set_link_modes(dev);
2509 #ifdef WORKAROUND_100HALF_PROMISC
2510                         /* delayed promiscuous enabling */
2511                         if (dev->flags & IFF_PROMISC)
2512                                 tc35815_set_multicast_list(dev);
2513 #endif
2514 #if 1
2515                         lp->saved_lpa = tc_mdio_read(dev, pid, MII_LPA);
2516                         lp->timer_state = lcheck;
2517                         restart_timer = 1;
2518 #else
2519                         lp->timer_state = asleep;
2520                         restart_timer = 0;
2521 #endif
2522                 } else {
2523                         if (lp->timer_ticks >= 4) { /* 6 seconds or so... */
2524                                 int ret;
2525
2526                                 ret = tc35815_try_next_permutation(dev);
2527                                 if (ret == -1) {
2528                                         /*
2529                                          * Aieee, tried them all, reset the
2530                                          * chip and try all over again.
2531                                          */
2532                                         printk(KERN_NOTICE "%s: Link down, "
2533                                                "cable problem?\n",
2534                                                dev->name);
2535
2536                                         /* Try to restart the adaptor. */
2537                                         tc35815_restart(dev);
2538                                         goto out;
2539                                 }
2540                                 lp->timer_ticks = 0;
2541                                 restart_timer = 1;
2542                         } else {
2543                                 restart_timer = 1;
2544                         }
2545                 }
2546                 break;
2547
2548         case lcheck:
2549                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2550                 lpa = tc_mdio_read(dev, pid, MII_LPA);
2551                 if (bmcr & (BMCR_PDOWN | BMCR_ISOLATE | BMCR_RESET)) {
2552                         printk(KERN_ERR "%s: PHY down? (BMCR %x)\n", dev->name,
2553                                bmcr);
2554                 } else if ((lp->saved_lpa ^ lpa) &
2555                            (LPA_100FULL|LPA_100HALF|LPA_10FULL|LPA_10HALF)) {
2556                         printk(KERN_NOTICE "%s: link status changed"
2557                                " (BMCR %x LPA %x->%x)\n", dev->name,
2558                                bmcr, lp->saved_lpa, lpa);
2559                 } else {
2560                         /* go on */
2561                         restart_timer = 1;
2562                         break;
2563                 }
2564                 /* Try to restart the adaptor. */
2565                 tc35815_restart(dev);
2566                 goto out;
2567
2568         case asleep:
2569         default:
2570                 /* Can't happens.... */
2571                 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got "
2572                        "one anyways!\n", dev->name);
2573                 restart_timer = 0;
2574                 lp->timer_ticks = 0;
2575                 lp->timer_state = asleep; /* foo on you */
2576                 break;
2577         }
2578
2579         if (restart_timer) {
2580                 lp->timer.expires = jiffies + msecs_to_jiffies(1200);
2581                 add_timer(&lp->timer);
2582         }
2583 out:
2584         spin_unlock_irq(&lp->lock);
2585 }
2586
2587 static void tc35815_start_auto_negotiation(struct net_device *dev,
2588                                            struct ethtool_cmd *ep)
2589 {
2590         struct tc35815_local *lp = dev->priv;
2591         int pid = lp->phy_addr;
2592         unsigned short bmsr, bmcr, advertize;
2593         int timeout;
2594
2595         netif_carrier_off(dev);
2596         bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2597         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2598         advertize = tc_mdio_read(dev, pid, MII_ADVERTISE);
2599
2600         if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
2601                 if (options.speed || options.duplex) {
2602                         /* Advertise only specified configuration. */
2603                         advertize &= ~(ADVERTISE_10HALF |
2604                                        ADVERTISE_10FULL |
2605                                        ADVERTISE_100HALF |
2606                                        ADVERTISE_100FULL);
2607                         if (options.speed != 10) {
2608                                 if (options.duplex != 1)
2609                                         advertize |= ADVERTISE_100FULL;
2610                                 if (options.duplex != 2)
2611                                         advertize |= ADVERTISE_100HALF;
2612                         }
2613                         if (options.speed != 100) {
2614                                 if (options.duplex != 1)
2615                                         advertize |= ADVERTISE_10FULL;
2616                                 if (options.duplex != 2)
2617                                         advertize |= ADVERTISE_10HALF;
2618                         }
2619                         if (options.speed == 100)
2620                                 bmcr |= BMCR_SPEED100;
2621                         else if (options.speed == 10)
2622                                 bmcr &= ~BMCR_SPEED100;
2623                         if (options.duplex == 2)
2624                                 bmcr |= BMCR_FULLDPLX;
2625                         else if (options.duplex == 1)
2626                                 bmcr &= ~BMCR_FULLDPLX;
2627                 } else {
2628                         /* Advertise everything we can support. */
2629                         if (bmsr & BMSR_10HALF)
2630                                 advertize |= ADVERTISE_10HALF;
2631                         else
2632                                 advertize &= ~ADVERTISE_10HALF;
2633                         if (bmsr & BMSR_10FULL)
2634                                 advertize |= ADVERTISE_10FULL;
2635                         else
2636                                 advertize &= ~ADVERTISE_10FULL;
2637                         if (bmsr & BMSR_100HALF)
2638                                 advertize |= ADVERTISE_100HALF;
2639                         else
2640                                 advertize &= ~ADVERTISE_100HALF;
2641                         if (bmsr & BMSR_100FULL)
2642                                 advertize |= ADVERTISE_100FULL;
2643                         else
2644                                 advertize &= ~ADVERTISE_100FULL;
2645                 }
2646
2647                 tc_mdio_write(dev, pid, MII_ADVERTISE, advertize);
2648
2649                 /* Enable Auto-Negotiation, this is usually on already... */
2650                 bmcr |= BMCR_ANENABLE;
2651                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2652
2653                 /* Restart it to make sure it is going. */
2654                 bmcr |= BMCR_ANRESTART;
2655                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2656                 printk(KERN_DEBUG "%s: ADVERTISE %x BMCR %x\n", dev->name, advertize, bmcr);
2657
2658                 /* BMCR_ANRESTART self clears when the process has begun. */
2659                 timeout = 64;  /* More than enough. */
2660                 while (--timeout) {
2661                         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2662                         if (!(bmcr & BMCR_ANRESTART))
2663                                 break; /* got it. */
2664                         udelay(10);
2665                 }
2666                 if (!timeout) {
2667                         printk(KERN_ERR "%s: TC35815 would not start auto "
2668                                "negotiation BMCR=0x%04x\n",
2669                                dev->name, bmcr);
2670                         printk(KERN_NOTICE "%s: Performing force link "
2671                                "detection.\n", dev->name);
2672                         goto force_link;
2673                 } else {
2674                         printk(KERN_DEBUG "%s: auto negotiation started.\n", dev->name);
2675                         lp->timer_state = arbwait;
2676                 }
2677         } else {
2678 force_link:
2679                 /* Force the link up, trying first a particular mode.
2680                  * Either we are here at the request of ethtool or
2681                  * because the Happy Meal would not start to autoneg.
2682                  */
2683
2684                 /* Disable auto-negotiation in BMCR, enable the duplex and
2685                  * speed setting, init the timer state machine, and fire it off.
2686                  */
2687                 if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
2688                         bmcr = BMCR_SPEED100;
2689                 } else {
2690                         if (ep->speed == SPEED_100)
2691                                 bmcr = BMCR_SPEED100;
2692                         else
2693                                 bmcr = 0;
2694                         if (ep->duplex == DUPLEX_FULL)
2695                                 bmcr |= BMCR_FULLDPLX;
2696                 }
2697                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2698
2699                 /* OK, seems we need do disable the transceiver for the first
2700                  * tick to make sure we get an accurate link state at the
2701                  * second tick.
2702                  */
2703                 lp->timer_state = ltrywait;
2704         }
2705
2706         del_timer(&lp->timer);
2707         lp->timer_ticks = 0;
2708         lp->timer.expires = jiffies + msecs_to_jiffies(1200);
2709         add_timer(&lp->timer);
2710 }
2711
2712 static void tc35815_find_phy(struct net_device *dev)
2713 {
2714         struct tc35815_local *lp = dev->priv;
2715         int pid = lp->phy_addr;
2716         unsigned short id0;
2717
2718         /* find MII phy */
2719         for (pid = 31; pid >= 0; pid--) {
2720                 id0 = tc_mdio_read(dev, pid, MII_BMSR);
2721                 if (id0 != 0xffff && id0 != 0x0000 &&
2722                     (id0 & BMSR_RESV) != (0xffff & BMSR_RESV) /* paranoia? */
2723                         ) {
2724                         lp->phy_addr = pid;
2725                         break;
2726                 }
2727         }
2728         if (pid < 0) {
2729                 printk(KERN_ERR "%s: No MII Phy found.\n",
2730                        dev->name);
2731                 lp->phy_addr = pid = 0;
2732         }
2733
2734         lp->mii_id[0] = tc_mdio_read(dev, pid, MII_PHYSID1);
2735         lp->mii_id[1] = tc_mdio_read(dev, pid, MII_PHYSID2);
2736         if (netif_msg_hw(lp))
2737                 printk(KERN_INFO "%s: PHY(%02x) ID %04x %04x\n", dev->name,
2738                        pid, lp->mii_id[0], lp->mii_id[1]);
2739 }
2740
2741 static void tc35815_phy_chip_init(struct net_device *dev)
2742 {
2743         struct tc35815_local *lp = dev->priv;
2744         int pid = lp->phy_addr;
2745         unsigned short bmcr;
2746         struct ethtool_cmd ecmd, *ep;
2747
2748         /* dis-isolate if needed. */
2749         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2750         if (bmcr & BMCR_ISOLATE) {
2751                 int count = 32;
2752                 printk(KERN_DEBUG "%s: unisolating...", dev->name);
2753                 tc_mdio_write(dev, pid, MII_BMCR, bmcr & ~BMCR_ISOLATE);
2754                 while (--count) {
2755                         if (!(tc_mdio_read(dev, pid, MII_BMCR) & BMCR_ISOLATE))
2756                                 break;
2757                         udelay(20);
2758                 }
2759                 printk(" %s.\n", count ? "done" : "failed");
2760         }
2761
2762         if (options.speed && options.duplex) {
2763                 ecmd.autoneg = AUTONEG_DISABLE;
2764                 ecmd.speed = options.speed == 10 ? SPEED_10 : SPEED_100;
2765                 ecmd.duplex = options.duplex == 1 ? DUPLEX_HALF : DUPLEX_FULL;
2766                 ep = &ecmd;
2767         } else {
2768                 ep = NULL;
2769         }
2770         tc35815_start_auto_negotiation(dev, ep);
2771 }
2772
2773 static void tc35815_chip_reset(struct net_device *dev)
2774 {
2775         struct tc35815_regs __iomem *tr =
2776                 (struct tc35815_regs __iomem *)dev->base_addr;
2777         int i;
2778         /* reset the controller */
2779         tc_writel(MAC_Reset, &tr->MAC_Ctl);
2780         udelay(4); /* 3200ns */
2781         i = 0;
2782         while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
2783                 if (i++ > 100) {
2784                         printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
2785                         break;
2786                 }
2787                 mdelay(1);
2788         }
2789         tc_writel(0, &tr->MAC_Ctl);
2790
2791         /* initialize registers to default value */
2792         tc_writel(0, &tr->DMA_Ctl);
2793         tc_writel(0, &tr->TxThrsh);
2794         tc_writel(0, &tr->TxPollCtr);
2795         tc_writel(0, &tr->RxFragSize);
2796         tc_writel(0, &tr->Int_En);
2797         tc_writel(0, &tr->FDA_Bas);
2798         tc_writel(0, &tr->FDA_Lim);
2799         tc_writel(0xffffffff, &tr->Int_Src);    /* Write 1 to clear */
2800         tc_writel(0, &tr->CAM_Ctl);
2801         tc_writel(0, &tr->Tx_Ctl);
2802         tc_writel(0, &tr->Rx_Ctl);
2803         tc_writel(0, &tr->CAM_Ena);
2804         (void)tc_readl(&tr->Miss_Cnt);  /* Read to clear */
2805
2806         /* initialize internal SRAM */
2807         tc_writel(DMA_TestMode, &tr->DMA_Ctl);
2808         for (i = 0; i < 0x1000; i += 4) {
2809                 tc_writel(i, &tr->CAM_Adr);
2810                 tc_writel(0, &tr->CAM_Data);
2811         }
2812         tc_writel(0, &tr->DMA_Ctl);
2813 }
2814
2815 static void tc35815_chip_init(struct net_device *dev)
2816 {
2817         struct tc35815_local *lp = dev->priv;
2818         struct tc35815_regs __iomem *tr =
2819                 (struct tc35815_regs __iomem *)dev->base_addr;
2820         unsigned long txctl = TX_CTL_CMD;
2821
2822         tc35815_phy_chip_init(dev);
2823
2824         /* load station address to CAM */
2825         tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
2826
2827         /* Enable CAM (broadcast and unicast) */
2828         tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2829         tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2830
2831         /* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
2832         if (HAVE_DMA_RXALIGN(lp))
2833                 tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
2834         else
2835                 tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
2836 #ifdef TC35815_USE_PACKEDBUFFER
2837         tc_writel(RxFrag_EnPack | ETH_ZLEN, &tr->RxFragSize);   /* Packing */
2838 #else
2839         tc_writel(ETH_ZLEN, &tr->RxFragSize);
2840 #endif
2841         tc_writel(0, &tr->TxPollCtr);   /* Batch mode */
2842         tc_writel(TX_THRESHOLD, &tr->TxThrsh);
2843         tc_writel(INT_EN_CMD, &tr->Int_En);
2844
2845         /* set queues */
2846         tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
2847         tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
2848                   &tr->FDA_Lim);
2849         /*
2850          * Activation method:
2851          * First, enable the MAC Transmitter and the DMA Receive circuits.
2852          * Then enable the DMA Transmitter and the MAC Receive circuits.
2853          */
2854         tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr);      /* start DMA receiver */
2855         tc_writel(RX_CTL_CMD, &tr->Rx_Ctl);     /* start MAC receiver */
2856
2857         /* start MAC transmitter */
2858 #ifndef NO_CHECK_CARRIER
2859         /* TX4939 does not have EnLCarr */
2860         if (lp->boardtype == TC35815_TX4939)
2861                 txctl &= ~Tx_EnLCarr;
2862 #ifdef WORKAROUND_LOSTCAR
2863         /* WORKAROUND: ignore LostCrS in full duplex operation */
2864         if ((lp->timer_state != asleep && lp->timer_state != lcheck) ||
2865             lp->fullduplex)
2866                 txctl &= ~Tx_EnLCarr;
2867 #endif
2868 #endif /* !NO_CHECK_CARRIER */
2869 #ifdef GATHER_TXINT
2870         txctl &= ~Tx_EnComp;    /* disable global tx completion int. */
2871 #endif
2872         tc_writel(txctl, &tr->Tx_Ctl);
2873 }
2874
2875 #ifdef CONFIG_PM
2876 static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
2877 {
2878         struct net_device *dev = pci_get_drvdata(pdev);
2879         struct tc35815_local *lp = dev->priv;
2880         unsigned long flags;
2881
2882         pci_save_state(pdev);
2883         if (!netif_running(dev))
2884                 return 0;
2885         netif_device_detach(dev);
2886         spin_lock_irqsave(&lp->lock, flags);
2887         del_timer(&lp->timer);          /* Kill if running      */
2888         tc35815_chip_reset(dev);
2889         spin_unlock_irqrestore(&lp->lock, flags);
2890         pci_set_power_state(pdev, PCI_D3hot);
2891         return 0;
2892 }
2893
2894 static int tc35815_resume(struct pci_dev *pdev)
2895 {
2896         struct net_device *dev = pci_get_drvdata(pdev);
2897         struct tc35815_local *lp = dev->priv;
2898         unsigned long flags;
2899
2900         pci_restore_state(pdev);
2901         if (!netif_running(dev))
2902                 return 0;
2903         pci_set_power_state(pdev, PCI_D0);
2904         spin_lock_irqsave(&lp->lock, flags);
2905         tc35815_restart(dev);
2906         spin_unlock_irqrestore(&lp->lock, flags);
2907         netif_device_attach(dev);
2908         return 0;
2909 }
2910 #endif /* CONFIG_PM */
2911
2912 static struct pci_driver tc35815_pci_driver = {
2913         .name           = MODNAME,
2914         .id_table       = tc35815_pci_tbl,
2915         .probe          = tc35815_init_one,
2916         .remove         = __devexit_p(tc35815_remove_one),
2917 #ifdef CONFIG_PM
2918         .suspend        = tc35815_suspend,
2919         .resume         = tc35815_resume,
2920 #endif
2921 };
2922
2923 module_param_named(speed, options.speed, int, 0);
2924 MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
2925 module_param_named(duplex, options.duplex, int, 0);
2926 MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
2927 module_param_named(doforce, options.doforce, int, 0);
2928 MODULE_PARM_DESC(doforce, "try force link mode if auto-negotiation failed");
2929
2930 static int __init tc35815_init_module(void)
2931 {
2932         return pci_register_driver(&tc35815_pci_driver);
2933 }
2934
2935 static void __exit tc35815_cleanup_module(void)
2936 {
2937         pci_unregister_driver(&tc35815_pci_driver);
2938 }
2939
2940 module_init(tc35815_init_module);
2941 module_exit(tc35815_cleanup_module);
2942
2943 MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
2944 MODULE_LICENSE("GPL");