drivers/net/tc35815.c

   1 /*
   2  * tc35815.c: A TOSHIBA TC35815CF PCI 10/100Mbps ethernet driver for linux.
   3  *
   4  * Based on skelton.c by Donald Becker.
   5  *
   6  * This driver is a replacement of older and less maintained version.
   7  * This is a header of the older version:
   8  *      -----<snip>-----
   9  *      Copyright 2001 MontaVista Software Inc.
  10  *      Author: MontaVista Software, Inc.
  11  *              ahennessy@mvista.com
  12  *      Copyright (C) 2000-2001 Toshiba Corporation
  13  *      static const char *version =
  14  *              "tc35815.c:v0.00 26/07/2000 by Toshiba Corporation\n";
  15  *      -----<snip>-----
  16  *
  17  * This file is subject to the terms and conditions of the GNU General Public
  18  * License.  See the file "COPYING" in the main directory of this archive
  19  * for more details.
  20  *
  21  * (C) Copyright TOSHIBA CORPORATION 2004-2005
  22  * All Rights Reserved.
  23  */
  24
  25 #ifdef TC35815_NAPI
  26 #define DRV_VERSION     "1.35-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         skb->dev = dev;
 544         *dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
 545                                      PCI_DMA_FROMDEVICE);
 546         if (pci_dma_mapping_error(*dma_handle)) {
 547                 dev_kfree_skb_any(skb);
 548                 return NULL;
 549         }
 550         skb_reserve(skb, 2);    /* make IP header 4byte aligned */
 551         return skb;
 552 }
 553
 554 static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
 555 {
 556         pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
 557                          PCI_DMA_FROMDEVICE);
 558         dev_kfree_skb_any(skb);
 559 }
 560 #endif /* TC35815_USE_PACKEDBUFFER */
 561
 562 /* Index to functions, as function prototypes. */
 563
 564 static int      tc35815_open(struct net_device *dev);
 565 static int      tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
 566 static irqreturn_t      tc35815_interrupt(int irq, void *dev_id);
 567 #ifdef TC35815_NAPI
 568 static int      tc35815_rx(struct net_device *dev, int limit);
 569 static int      tc35815_poll(struct net_device *dev, int *budget);
 570 #else
 571 static void     tc35815_rx(struct net_device *dev);
 572 #endif
 573 static void     tc35815_txdone(struct net_device *dev);
 574 static int      tc35815_close(struct net_device *dev);
 575 static struct   net_device_stats *tc35815_get_stats(struct net_device *dev);
 576 static void     tc35815_set_multicast_list(struct net_device *dev);
 577 static void     tc35815_tx_timeout(struct net_device *dev);
 578 static int      tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 579 #ifdef CONFIG_NET_POLL_CONTROLLER
 580 static void     tc35815_poll_controller(struct net_device *dev);
 581 #endif
 582 static const struct ethtool_ops tc35815_ethtool_ops;
 583
 584 /* Example routines you must write ;->. */
 585 static void     tc35815_chip_reset(struct net_device *dev);
 586 static void     tc35815_chip_init(struct net_device *dev);
 587 static void     tc35815_find_phy(struct net_device *dev);
 588 static void     tc35815_phy_chip_init(struct net_device *dev);
 589
 590 #ifdef DEBUG
 591 static void     panic_queues(struct net_device *dev);
 592 #endif
 593
 594 static void tc35815_timer(unsigned long data);
 595 static void tc35815_start_auto_negotiation(struct net_device *dev,
 596                                            struct ethtool_cmd *ep);
 597 static int tc_mdio_read(struct net_device *dev, int phy_id, int location);
 598 static void tc_mdio_write(struct net_device *dev, int phy_id, int location,
 599                           int val);
 600
 601 static void __devinit tc35815_init_dev_addr (struct net_device *dev)
 602 {
 603         struct tc35815_regs __iomem *tr =
 604                 (struct tc35815_regs __iomem *)dev->base_addr;
 605         int i;
 606
 607         /* dev_addr will be overwritten on NETDEV_REGISTER event */
 608         while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 609                 ;
 610         for (i = 0; i < 6; i += 2) {
 611                 unsigned short data;
 612                 tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
 613                 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 614                         ;
 615                 data = tc_readl(&tr->PROM_Data);
 616                 dev->dev_addr[i] = data & 0xff;
 617                 dev->dev_addr[i+1] = data >> 8;
 618         }
 619 }
 620
 621 static int __devinit tc35815_init_one (struct pci_dev *pdev,
 622                                        const struct pci_device_id *ent)
 623 {
 624         void __iomem *ioaddr = NULL;
 625         struct net_device *dev;
 626         struct tc35815_local *lp;
 627         int rc;
 628         unsigned long mmio_start, mmio_end, mmio_flags, mmio_len;
 629
 630         static int printed_version;
 631         if (!printed_version++) {
 632                 printk(version);
 633                 dev_printk(KERN_DEBUG, &pdev->dev,
 634                            "speed:%d duplex:%d doforce:%d\n",
 635                            options.speed, options.duplex, options.doforce);
 636         }
 637
 638         if (!pdev->irq) {
 639                 dev_warn(&pdev->dev, "no IRQ assigned.\n");
 640                 return -ENODEV;
 641         }
 642
 643         /* dev zeroed in alloc_etherdev */
 644         dev = alloc_etherdev (sizeof (*lp));
 645         if (dev == NULL) {
 646                 dev_err(&pdev->dev, "unable to alloc new ethernet\n");
 647                 return -ENOMEM;
 648         }
 649         SET_MODULE_OWNER(dev);
 650         SET_NETDEV_DEV(dev, &pdev->dev);
 651         lp = dev->priv;
 652
 653         /* enable device (incl. PCI PM wakeup), and bus-mastering */
 654         rc = pci_enable_device (pdev);
 655         if (rc)
 656                 goto err_out;
 657
 658         mmio_start = pci_resource_start (pdev, 1);
 659         mmio_end = pci_resource_end (pdev, 1);
 660         mmio_flags = pci_resource_flags (pdev, 1);
 661         mmio_len = pci_resource_len (pdev, 1);
 662
 663         /* set this immediately, we need to know before
 664          * we talk to the chip directly */
 665
 666         /* make sure PCI base addr 1 is MMIO */
 667         if (!(mmio_flags & IORESOURCE_MEM)) {
 668                 dev_err(&pdev->dev, "region #1 not an MMIO resource, aborting\n");
 669                 rc = -ENODEV;
 670                 goto err_out;
 671         }
 672
 673         /* check for weird/broken PCI region reporting */
 674         if ((mmio_len < sizeof(struct tc35815_regs))) {
 675                 dev_err(&pdev->dev, "Invalid PCI region size(s), aborting\n");
 676                 rc = -ENODEV;
 677                 goto err_out;
 678         }
 679
 680         rc = pci_request_regions (pdev, MODNAME);
 681         if (rc)
 682                 goto err_out;
 683
 684         pci_set_master (pdev);
 685
 686         /* ioremap MMIO region */
 687         ioaddr = ioremap (mmio_start, mmio_len);
 688         if (ioaddr == NULL) {
 689                 dev_err(&pdev->dev, "cannot remap MMIO, aborting\n");
 690                 rc = -EIO;
 691                 goto err_out_free_res;
 692         }
 693
 694         /* Initialize the device structure. */
 695         dev->open = tc35815_open;
 696         dev->hard_start_xmit = tc35815_send_packet;
 697         dev->stop = tc35815_close;
 698         dev->get_stats = tc35815_get_stats;
 699         dev->set_multicast_list = tc35815_set_multicast_list;
 700         dev->do_ioctl = tc35815_ioctl;
 701         dev->ethtool_ops = &tc35815_ethtool_ops;
 702         dev->tx_timeout = tc35815_tx_timeout;
 703         dev->watchdog_timeo = TC35815_TX_TIMEOUT;
 704 #ifdef TC35815_NAPI
 705         dev->poll = tc35815_poll;
 706         dev->weight = NAPI_WEIGHT;
 707 #endif
 708 #ifdef CONFIG_NET_POLL_CONTROLLER
 709         dev->poll_controller = tc35815_poll_controller;
 710 #endif
 711
 712         dev->irq = pdev->irq;
 713         dev->base_addr = (unsigned long) ioaddr;
 714
 715         /* dev->priv/lp zeroed and aligned in alloc_etherdev */
 716         lp = dev->priv;
 717         spin_lock_init(&lp->lock);
 718         lp->pci_dev = pdev;
 719         lp->boardtype = ent->driver_data;
 720
 721         lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
 722         pci_set_drvdata(pdev, dev);
 723
 724         /* Soft reset the chip. */
 725         tc35815_chip_reset(dev);
 726
 727         /* Retrieve the ethernet address. */
 728         tc35815_init_dev_addr(dev);
 729
 730         rc = register_netdev (dev);
 731         if (rc)
 732                 goto err_out_unmap;
 733
 734         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
 735         printk(KERN_INFO "%s: %s at 0x%lx, "
 736                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
 737                 "IRQ %d\n",
 738                 dev->name,
 739                 board_info[ent->driver_data].name,
 740                 dev->base_addr,
 741                 dev->dev_addr[0], dev->dev_addr[1],
 742                 dev->dev_addr[2], dev->dev_addr[3],
 743                 dev->dev_addr[4], dev->dev_addr[5],
 744                 dev->irq);
 745
 746         setup_timer(&lp->timer, tc35815_timer, (unsigned long) dev);
 747         lp->mii.dev = dev;
 748         lp->mii.mdio_read = tc_mdio_read;
 749         lp->mii.mdio_write = tc_mdio_write;
 750         lp->mii.phy_id_mask = 0x1f;
 751         lp->mii.reg_num_mask = 0x1f;
 752         tc35815_find_phy(dev);
 753         lp->mii.phy_id = lp->phy_addr;
 754         lp->mii.full_duplex = 0;
 755         lp->mii.force_media = 0;
 756
 757         return 0;
 758
 759 err_out_unmap:
 760         iounmap(ioaddr);
 761 err_out_free_res:
 762         pci_release_regions (pdev);
 763 err_out:
 764         free_netdev (dev);
 765         return rc;
 766 }
 767
 768
 769 static void __devexit tc35815_remove_one (struct pci_dev *pdev)
 770 {
 771         struct net_device *dev = pci_get_drvdata (pdev);
 772         unsigned long mmio_addr;
 773
 774         mmio_addr = dev->base_addr;
 775
 776         unregister_netdev (dev);
 777
 778         if (mmio_addr) {
 779                 iounmap ((void __iomem *)mmio_addr);
 780                 pci_release_regions (pdev);
 781         }
 782
 783         free_netdev (dev);
 784
 785         pci_set_drvdata (pdev, NULL);
 786 }
 787
 788 static int
 789 tc35815_init_queues(struct net_device *dev)
 790 {
 791         struct tc35815_local *lp = dev->priv;
 792         int i;
 793         unsigned long fd_addr;
 794
 795         if (!lp->fd_buf) {
 796                 BUG_ON(sizeof(struct FDesc) +
 797                        sizeof(struct BDesc) * RX_BUF_NUM +
 798                        sizeof(struct FDesc) * RX_FD_NUM +
 799                        sizeof(struct TxFD) * TX_FD_NUM >
 800                        PAGE_SIZE * FD_PAGE_NUM);
 801
 802                 if ((lp->fd_buf = pci_alloc_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM, &lp->fd_buf_dma)) == 0)
 803                         return -ENOMEM;
 804                 for (i = 0; i < RX_BUF_NUM; i++) {
 805 #ifdef TC35815_USE_PACKEDBUFFER
 806                         if ((lp->data_buf[i] = alloc_rxbuf_page(lp->pci_dev, &lp->data_buf_dma[i])) == NULL) {
 807                                 while (--i >= 0) {
 808                                         free_rxbuf_page(lp->pci_dev,
 809                                                         lp->data_buf[i],
 810                                                         lp->data_buf_dma[i]);
 811                                         lp->data_buf[i] = NULL;
 812                                 }
 813                                 pci_free_consistent(lp->pci_dev,
 814                                                     PAGE_SIZE * FD_PAGE_NUM,
 815                                                     lp->fd_buf,
 816                                                     lp->fd_buf_dma);
 817                                 lp->fd_buf = NULL;
 818                                 return -ENOMEM;
 819                         }
 820 #else
 821                         lp->rx_skbs[i].skb =
 822                                 alloc_rxbuf_skb(dev, lp->pci_dev,
 823                                                 &lp->rx_skbs[i].skb_dma);
 824                         if (!lp->rx_skbs[i].skb) {
 825                                 while (--i >= 0) {
 826                                         free_rxbuf_skb(lp->pci_dev,
 827                                                        lp->rx_skbs[i].skb,
 828                                                        lp->rx_skbs[i].skb_dma);
 829                                         lp->rx_skbs[i].skb = NULL;
 830                                 }
 831                                 pci_free_consistent(lp->pci_dev,
 832                                                     PAGE_SIZE * FD_PAGE_NUM,
 833                                                     lp->fd_buf,
 834                                                     lp->fd_buf_dma);
 835                                 lp->fd_buf = NULL;
 836                                 return -ENOMEM;
 837                         }
 838 #endif
 839                 }
 840                 printk(KERN_DEBUG "%s: FD buf %p DataBuf",
 841                        dev->name, lp->fd_buf);
 842 #ifdef TC35815_USE_PACKEDBUFFER
 843                 printk(" DataBuf");
 844                 for (i = 0; i < RX_BUF_NUM; i++)
 845                         printk(" %p", lp->data_buf[i]);
 846 #endif
 847                 printk("\n");
 848         } else {
 849                 for (i = 0; i < FD_PAGE_NUM; i++) {
 850                         clear_page((void *)((unsigned long)lp->fd_buf + i * PAGE_SIZE));
 851                 }
 852         }
 853         fd_addr = (unsigned long)lp->fd_buf;
 854
 855         /* Free Descriptors (for Receive) */
 856         lp->rfd_base = (struct RxFD *)fd_addr;
 857         fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
 858         for (i = 0; i < RX_FD_NUM; i++) {
 859                 lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
 860         }
 861         lp->rfd_cur = lp->rfd_base;
 862         lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
 863
 864         /* Transmit Descriptors */
 865         lp->tfd_base = (struct TxFD *)fd_addr;
 866         fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
 867         for (i = 0; i < TX_FD_NUM; i++) {
 868                 lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
 869                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 870                 lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
 871         }
 872         lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
 873         lp->tfd_start = 0;
 874         lp->tfd_end = 0;
 875
 876         /* Buffer List (for Receive) */
 877         lp->fbl_ptr = (struct FrFD *)fd_addr;
 878         lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
 879         lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
 880 #ifndef TC35815_USE_PACKEDBUFFER
 881         /*
 882          * move all allocated skbs to head of rx_skbs[] array.
 883          * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
 884          * tc35815_rx() had failed.
 885          */
 886         lp->fbl_count = 0;
 887         for (i = 0; i < RX_BUF_NUM; i++) {
 888                 if (lp->rx_skbs[i].skb) {
 889                         if (i != lp->fbl_count) {
 890                                 lp->rx_skbs[lp->fbl_count].skb =
 891                                         lp->rx_skbs[i].skb;
 892                                 lp->rx_skbs[lp->fbl_count].skb_dma =
 893                                         lp->rx_skbs[i].skb_dma;
 894                         }
 895                         lp->fbl_count++;
 896                 }
 897         }
 898 #endif
 899         for (i = 0; i < RX_BUF_NUM; i++) {
 900 #ifdef TC35815_USE_PACKEDBUFFER
 901                 lp->fbl_ptr->bd[i].BuffData = cpu_to_le32(lp->data_buf_dma[i]);
 902 #else
 903                 if (i >= lp->fbl_count) {
 904                         lp->fbl_ptr->bd[i].BuffData = 0;
 905                         lp->fbl_ptr->bd[i].BDCtl = 0;
 906                         continue;
 907                 }
 908                 lp->fbl_ptr->bd[i].BuffData =
 909                         cpu_to_le32(lp->rx_skbs[i].skb_dma);
 910 #endif
 911                 /* BDID is index of FrFD.bd[] */
 912                 lp->fbl_ptr->bd[i].BDCtl =
 913                         cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
 914                                     RX_BUF_SIZE);
 915         }
 916 #ifdef TC35815_USE_PACKEDBUFFER
 917         lp->fbl_curid = 0;
 918 #endif
 919
 920         printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
 921                dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
 922         return 0;
 923 }
 924
 925 static void
 926 tc35815_clear_queues(struct net_device *dev)
 927 {
 928         struct tc35815_local *lp = dev->priv;
 929         int i;
 930
 931         for (i = 0; i < TX_FD_NUM; i++) {
 932                 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
 933                 struct sk_buff *skb =
 934                         fdsystem != 0xffffffff ?
 935                         lp->tx_skbs[fdsystem].skb : NULL;
 936 #ifdef DEBUG
 937                 if (lp->tx_skbs[i].skb != skb) {
 938                         printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
 939                         panic_queues(dev);
 940                 }
 941 #else
 942                 BUG_ON(lp->tx_skbs[i].skb != skb);
 943 #endif
 944                 if (skb) {
 945                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
 946                         lp->tx_skbs[i].skb = NULL;
 947                         lp->tx_skbs[i].skb_dma = 0;
 948                         dev_kfree_skb_any(skb);
 949                 }
 950                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 951         }
 952
 953         tc35815_init_queues(dev);
 954 }
 955
 956 static void
 957 tc35815_free_queues(struct net_device *dev)
 958 {
 959         struct tc35815_local *lp = dev->priv;
 960         int i;
 961
 962         if (lp->tfd_base) {
 963                 for (i = 0; i < TX_FD_NUM; i++) {
 964                         u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
 965                         struct sk_buff *skb =
 966                                 fdsystem != 0xffffffff ?
 967                                 lp->tx_skbs[fdsystem].skb : NULL;
 968 #ifdef DEBUG
 969                         if (lp->tx_skbs[i].skb != skb) {
 970                                 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
 971                                 panic_queues(dev);
 972                         }
 973 #else
 974                         BUG_ON(lp->tx_skbs[i].skb != skb);
 975 #endif
 976                         if (skb) {
 977                                 dev_kfree_skb(skb);
 978                                 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
 979                                 lp->tx_skbs[i].skb = NULL;
 980                                 lp->tx_skbs[i].skb_dma = 0;
 981                         }
 982                         lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 983                 }
 984         }
 985
 986         lp->rfd_base = NULL;
 987         lp->rfd_limit = NULL;
 988         lp->rfd_cur = NULL;
 989         lp->fbl_ptr = NULL;
 990
 991         for (i = 0; i < RX_BUF_NUM; i++) {
 992 #ifdef TC35815_USE_PACKEDBUFFER
 993                 if (lp->data_buf[i]) {
 994                         free_rxbuf_page(lp->pci_dev,
 995                                         lp->data_buf[i], lp->data_buf_dma[i]);
 996                         lp->data_buf[i] = NULL;
 997                 }
 998 #else
 999                 if (lp->rx_skbs[i].skb) {
1000                         free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
1001                                        lp->rx_skbs[i].skb_dma);
1002                         lp->rx_skbs[i].skb = NULL;
1003                 }
1004 #endif
1005         }
1006         if (lp->fd_buf) {
1007                 pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
1008                                     lp->fd_buf, lp->fd_buf_dma);
1009                 lp->fd_buf = NULL;
1010         }
1011 }
1012
1013 static void
1014 dump_txfd(struct TxFD *fd)
1015 {
1016         printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
1017                le32_to_cpu(fd->fd.FDNext),
1018                le32_to_cpu(fd->fd.FDSystem),
1019                le32_to_cpu(fd->fd.FDStat),
1020                le32_to_cpu(fd->fd.FDCtl));
1021         printk("BD: ");
1022         printk(" %08x %08x",
1023                le32_to_cpu(fd->bd.BuffData),
1024                le32_to_cpu(fd->bd.BDCtl));
1025         printk("\n");
1026 }
1027
1028 static int
1029 dump_rxfd(struct RxFD *fd)
1030 {
1031         int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1032         if (bd_count > 8)
1033                 bd_count = 8;
1034         printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
1035                le32_to_cpu(fd->fd.FDNext),
1036                le32_to_cpu(fd->fd.FDSystem),
1037                le32_to_cpu(fd->fd.FDStat),
1038                le32_to_cpu(fd->fd.FDCtl));
1039         if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
1040             return 0;
1041         printk("BD: ");
1042         for (i = 0; i < bd_count; i++)
1043                 printk(" %08x %08x",
1044                        le32_to_cpu(fd->bd[i].BuffData),
1045                        le32_to_cpu(fd->bd[i].BDCtl));
1046         printk("\n");
1047         return bd_count;
1048 }
1049
1050 #if defined(DEBUG) || defined(TC35815_USE_PACKEDBUFFER)
1051 static void
1052 dump_frfd(struct FrFD *fd)
1053 {
1054         int i;
1055         printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
1056                le32_to_cpu(fd->fd.FDNext),
1057                le32_to_cpu(fd->fd.FDSystem),
1058                le32_to_cpu(fd->fd.FDStat),
1059                le32_to_cpu(fd->fd.FDCtl));
1060         printk("BD: ");
1061         for (i = 0; i < RX_BUF_NUM; i++)
1062                 printk(" %08x %08x",
1063                        le32_to_cpu(fd->bd[i].BuffData),
1064                        le32_to_cpu(fd->bd[i].BDCtl));
1065         printk("\n");
1066 }
1067 #endif
1068
1069 #ifdef DEBUG
1070 static void
1071 panic_queues(struct net_device *dev)
1072 {
1073         struct tc35815_local *lp = dev->priv;
1074         int i;
1075
1076         printk("TxFD base %p, start %u, end %u\n",
1077                lp->tfd_base, lp->tfd_start, lp->tfd_end);
1078         printk("RxFD base %p limit %p cur %p\n",
1079                lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
1080         printk("FrFD %p\n", lp->fbl_ptr);
1081         for (i = 0; i < TX_FD_NUM; i++)
1082                 dump_txfd(&lp->tfd_base[i]);
1083         for (i = 0; i < RX_FD_NUM; i++) {
1084                 int bd_count = dump_rxfd(&lp->rfd_base[i]);
1085                 i += (bd_count + 1) / 2;        /* skip BDs */
1086         }
1087         dump_frfd(lp->fbl_ptr);
1088         panic("%s: Illegal queue state.", dev->name);
1089 }
1090 #endif
1091
1092 static void print_eth(char *add)
1093 {
1094         int i;
1095
1096         printk("print_eth(%p)\n", add);
1097         for (i = 0; i < 6; i++)
1098                 printk(" %2.2X", (unsigned char) add[i + 6]);
1099         printk(" =>");
1100         for (i = 0; i < 6; i++)
1101                 printk(" %2.2X", (unsigned char) add[i]);
1102         printk(" : %2.2X%2.2X\n", (unsigned char) add[12], (unsigned char) add[13]);
1103 }
1104
1105 static int tc35815_tx_full(struct net_device *dev)
1106 {
1107         struct tc35815_local *lp = dev->priv;
1108         return ((lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end);
1109 }
1110
1111 static void tc35815_restart(struct net_device *dev)
1112 {
1113         struct tc35815_local *lp = dev->priv;
1114         int pid = lp->phy_addr;
1115         int do_phy_reset = 1;
1116         del_timer(&lp->timer);          /* Kill if running      */
1117
1118         if (lp->mii_id[0] == 0x0016 && (lp->mii_id[1] & 0xfc00) == 0xf800) {
1119                 /* Resetting PHY cause problem on some chip... (SEEQ 80221) */
1120                 do_phy_reset = 0;
1121         }
1122         if (do_phy_reset) {
1123                 int timeout;
1124                 tc_mdio_write(dev, pid, MII_BMCR, BMCR_RESET);
1125                 timeout = 100;
1126                 while (--timeout) {
1127                         if (!(tc_mdio_read(dev, pid, MII_BMCR) & BMCR_RESET))
1128                                 break;
1129                         udelay(1);
1130                 }
1131                 if (!timeout)
1132                         printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
1133         }
1134
1135         tc35815_chip_reset(dev);
1136         tc35815_clear_queues(dev);
1137         tc35815_chip_init(dev);
1138         /* Reconfigure CAM again since tc35815_chip_init() initialize it. */
1139         tc35815_set_multicast_list(dev);
1140 }
1141
1142 static void tc35815_tx_timeout(struct net_device *dev)
1143 {
1144         struct tc35815_local *lp = dev->priv;
1145         struct tc35815_regs __iomem *tr =
1146                 (struct tc35815_regs __iomem *)dev->base_addr;
1147
1148         printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
1149                dev->name, tc_readl(&tr->Tx_Stat));
1150
1151         /* Try to restart the adaptor. */
1152         spin_lock_irq(&lp->lock);
1153         tc35815_restart(dev);
1154         spin_unlock_irq(&lp->lock);
1155
1156         lp->stats.tx_errors++;
1157
1158         /* If we have space available to accept new transmit
1159          * requests, wake up the queueing layer.  This would
1160          * be the case if the chipset_init() call above just
1161          * flushes out the tx queue and empties it.
1162          *
1163          * If instead, the tx queue is retained then the
1164          * netif_wake_queue() call should be placed in the
1165          * TX completion interrupt handler of the driver instead
1166          * of here.
1167          */
1168         if (!tc35815_tx_full(dev))
1169                 netif_wake_queue(dev);
1170 }
1171
1172 /*
1173  * Open/initialize the board. This is called (in the current kernel)
1174  * sometime after booting when the 'ifconfig' program is run.
1175  *
1176  * This routine should set everything up anew at each open, even
1177  * registers that "should" only need to be set once at boot, so that
1178  * there is non-reboot way to recover if something goes wrong.
1179  */
1180 static int
1181 tc35815_open(struct net_device *dev)
1182 {
1183         struct tc35815_local *lp = dev->priv;
1184
1185         /*
1186          * This is used if the interrupt line can turned off (shared).
1187          * See 3c503.c for an example of selecting the IRQ at config-time.
1188          */
1189         if (request_irq(dev->irq, &tc35815_interrupt, IRQF_SHARED, dev->name, dev)) {
1190                 return -EAGAIN;
1191         }
1192
1193         del_timer(&lp->timer);          /* Kill if running      */
1194         tc35815_chip_reset(dev);
1195
1196         if (tc35815_init_queues(dev) != 0) {
1197                 free_irq(dev->irq, dev);
1198                 return -EAGAIN;
1199         }
1200
1201         /* Reset the hardware here. Don't forget to set the station address. */
1202         spin_lock_irq(&lp->lock);
1203         tc35815_chip_init(dev);
1204         spin_unlock_irq(&lp->lock);
1205
1206         /* We are now ready to accept transmit requeusts from
1207          * the queueing layer of the networking.
1208          */
1209         netif_start_queue(dev);
1210
1211         return 0;
1212 }
1213
1214 /* This will only be invoked if your driver is _not_ in XOFF state.
1215  * What this means is that you need not check it, and that this
1216  * invariant will hold if you make sure that the netif_*_queue()
1217  * calls are done at the proper times.
1218  */
1219 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
1220 {
1221         struct tc35815_local *lp = dev->priv;
1222         struct TxFD *txfd;
1223         unsigned long flags;
1224
1225         /* If some error occurs while trying to transmit this
1226          * packet, you should return '1' from this function.
1227          * In such a case you _may not_ do anything to the
1228          * SKB, it is still owned by the network queueing
1229          * layer when an error is returned.  This means you
1230          * may not modify any SKB fields, you may not free
1231          * the SKB, etc.
1232          */
1233
1234         /* This is the most common case for modern hardware.
1235          * The spinlock protects this code from the TX complete
1236          * hardware interrupt handler.  Queue flow control is
1237          * thus managed under this lock as well.
1238          */
1239         spin_lock_irqsave(&lp->lock, flags);
1240
1241         /* failsafe... (handle txdone now if half of FDs are used) */
1242         if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
1243             TX_FD_NUM / 2)
1244                 tc35815_txdone(dev);
1245
1246         if (netif_msg_pktdata(lp))
1247                 print_eth(skb->data);
1248 #ifdef DEBUG
1249         if (lp->tx_skbs[lp->tfd_start].skb) {
1250                 printk("%s: tx_skbs conflict.\n", dev->name);
1251                 panic_queues(dev);
1252         }
1253 #else
1254         BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
1255 #endif
1256         lp->tx_skbs[lp->tfd_start].skb = skb;
1257         lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1258
1259         /*add to ring */
1260         txfd = &lp->tfd_base[lp->tfd_start];
1261         txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
1262         txfd->bd.BDCtl = cpu_to_le32(skb->len);
1263         txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
1264         txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
1265
1266         if (lp->tfd_start == lp->tfd_end) {
1267                 struct tc35815_regs __iomem *tr =
1268                         (struct tc35815_regs __iomem *)dev->base_addr;
1269                 /* Start DMA Transmitter. */
1270                 txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1271 #ifdef GATHER_TXINT
1272                 txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1273 #endif
1274                 if (netif_msg_tx_queued(lp)) {
1275                         printk("%s: starting TxFD.\n", dev->name);
1276                         dump_txfd(txfd);
1277                 }
1278                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1279         } else {
1280                 txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
1281                 if (netif_msg_tx_queued(lp)) {
1282                         printk("%s: queueing TxFD.\n", dev->name);
1283                         dump_txfd(txfd);
1284                 }
1285         }
1286         lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
1287
1288         dev->trans_start = jiffies;
1289
1290         /* If we just used up the very last entry in the
1291          * TX ring on this device, tell the queueing
1292          * layer to send no more.
1293          */
1294         if (tc35815_tx_full(dev)) {
1295                 if (netif_msg_tx_queued(lp))
1296                         printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
1297                 netif_stop_queue(dev);
1298         }
1299
1300         /* When the TX completion hw interrupt arrives, this
1301          * is when the transmit statistics are updated.
1302          */
1303
1304         spin_unlock_irqrestore(&lp->lock, flags);
1305         return 0;
1306 }
1307
1308 #define FATAL_ERROR_INT \
1309         (Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
1310 static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
1311 {
1312         static int count;
1313         printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
1314                dev->name, status);
1315         if (status & Int_IntPCI)
1316                 printk(" IntPCI");
1317         if (status & Int_DmParErr)
1318                 printk(" DmParErr");
1319         if (status & Int_IntNRAbt)
1320                 printk(" IntNRAbt");
1321         printk("\n");
1322         if (count++ > 100)
1323                 panic("%s: Too many fatal errors.", dev->name);
1324         printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
1325         /* Try to restart the adaptor. */
1326         tc35815_restart(dev);
1327 }
1328
1329 #ifdef TC35815_NAPI
1330 static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
1331 #else
1332 static int tc35815_do_interrupt(struct net_device *dev, u32 status)
1333 #endif
1334 {
1335         struct tc35815_local *lp = dev->priv;
1336         struct tc35815_regs __iomem *tr =
1337                 (struct tc35815_regs __iomem *)dev->base_addr;
1338         int ret = -1;
1339
1340         /* Fatal errors... */
1341         if (status & FATAL_ERROR_INT) {
1342                 tc35815_fatal_error_interrupt(dev, status);
1343                 return 0;
1344         }
1345         /* recoverable errors */
1346         if (status & Int_IntFDAEx) {
1347                 /* disable FDAEx int. (until we make rooms...) */
1348                 tc_writel(tc_readl(&tr->Int_En) & ~Int_FDAExEn, &tr->Int_En);
1349                 printk(KERN_WARNING
1350                        "%s: Free Descriptor Area Exhausted (%#x).\n",
1351                        dev->name, status);
1352                 lp->stats.rx_dropped++;
1353                 ret = 0;
1354         }
1355         if (status & Int_IntBLEx) {
1356                 /* disable BLEx int. (until we make rooms...) */
1357                 tc_writel(tc_readl(&tr->Int_En) & ~Int_BLExEn, &tr->Int_En);
1358                 printk(KERN_WARNING
1359                        "%s: Buffer List Exhausted (%#x).\n",
1360                        dev->name, status);
1361                 lp->stats.rx_dropped++;
1362                 ret = 0;
1363         }
1364         if (status & Int_IntExBD) {
1365                 printk(KERN_WARNING
1366                        "%s: Excessive Buffer Descriptiors (%#x).\n",
1367                        dev->name, status);
1368                 lp->stats.rx_length_errors++;
1369                 ret = 0;
1370         }
1371
1372         /* normal notification */
1373         if (status & Int_IntMacRx) {
1374                 /* Got a packet(s). */
1375 #ifdef TC35815_NAPI
1376                 ret = tc35815_rx(dev, limit);
1377 #else
1378                 tc35815_rx(dev);
1379                 ret = 0;
1380 #endif
1381                 lp->lstats.rx_ints++;
1382         }
1383         if (status & Int_IntMacTx) {
1384                 /* Transmit complete. */
1385                 lp->lstats.tx_ints++;
1386                 tc35815_txdone(dev);
1387                 netif_wake_queue(dev);
1388                 ret = 0;
1389         }
1390         return ret;
1391 }
1392
1393 /*
1394  * The typical workload of the driver:
1395  * Handle the network interface interrupts.
1396  */
1397 static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
1398 {
1399         struct net_device *dev = dev_id;
1400         struct tc35815_regs __iomem *tr =
1401                 (struct tc35815_regs __iomem *)dev->base_addr;
1402 #ifdef TC35815_NAPI
1403         u32 dmactl = tc_readl(&tr->DMA_Ctl);
1404
1405         if (!(dmactl & DMA_IntMask)) {
1406                 /* disable interrupts */
1407                 tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
1408                 if (netif_rx_schedule_prep(dev))
1409                         __netif_rx_schedule(dev);
1410                 else {
1411                         printk(KERN_ERR "%s: interrupt taken in poll\n",
1412                                dev->name);
1413                         BUG();
1414                 }
1415                 (void)tc_readl(&tr->Int_Src);   /* flush */
1416                 return IRQ_HANDLED;
1417         }
1418         return IRQ_NONE;
1419 #else
1420         struct tc35815_local *lp = dev->priv;
1421         int handled;
1422         u32 status;
1423
1424         spin_lock(&lp->lock);
1425         status = tc_readl(&tr->Int_Src);
1426         tc_writel(status, &tr->Int_Src);        /* write to clear */
1427         handled = tc35815_do_interrupt(dev, status);
1428         (void)tc_readl(&tr->Int_Src);   /* flush */
1429         spin_unlock(&lp->lock);
1430         return IRQ_RETVAL(handled >= 0);
1431 #endif /* TC35815_NAPI */
1432 }
1433
1434 #ifdef CONFIG_NET_POLL_CONTROLLER
1435 static void tc35815_poll_controller(struct net_device *dev)
1436 {
1437         disable_irq(dev->irq);
1438         tc35815_interrupt(dev->irq, dev);
1439         enable_irq(dev->irq);
1440 }
1441 #endif
1442
1443 /* We have a good packet(s), get it/them out of the buffers. */
1444 #ifdef TC35815_NAPI
1445 static int
1446 tc35815_rx(struct net_device *dev, int limit)
1447 #else
1448 static void
1449 tc35815_rx(struct net_device *dev)
1450 #endif
1451 {
1452         struct tc35815_local *lp = dev->priv;
1453         unsigned int fdctl;
1454         int i;
1455         int buf_free_count = 0;
1456         int fd_free_count = 0;
1457 #ifdef TC35815_NAPI
1458         int received = 0;
1459 #endif
1460
1461         while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
1462                 int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
1463                 int pkt_len = fdctl & FD_FDLength_MASK;
1464                 int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1465 #ifdef DEBUG
1466                 struct RxFD *next_rfd;
1467 #endif
1468 #if (RX_CTL_CMD & Rx_StripCRC) == 0
1469                 pkt_len -= 4;
1470 #endif
1471
1472                 if (netif_msg_rx_status(lp))
1473                         dump_rxfd(lp->rfd_cur);
1474                 if (status & Rx_Good) {
1475                         struct sk_buff *skb;
1476                         unsigned char *data;
1477                         int cur_bd;
1478 #ifdef TC35815_USE_PACKEDBUFFER
1479                         int offset;
1480 #endif
1481
1482 #ifdef TC35815_NAPI
1483                         if (--limit < 0)
1484                                 break;
1485 #endif
1486 #ifdef TC35815_USE_PACKEDBUFFER
1487                         BUG_ON(bd_count > 2);
1488                         skb = dev_alloc_skb(pkt_len + 2); /* +2: for reserve */
1489                         if (skb == NULL) {
1490                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
1491                                        dev->name);
1492                                 lp->stats.rx_dropped++;
1493                                 break;
1494                         }
1495                         skb_reserve(skb, 2);   /* 16 bit alignment */
1496
1497                         data = skb_put(skb, pkt_len);
1498
1499                         /* copy from receive buffer */
1500                         cur_bd = 0;
1501                         offset = 0;
1502                         while (offset < pkt_len && cur_bd < bd_count) {
1503                                 int len = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BDCtl) &
1504                                         BD_BuffLength_MASK;
1505                                 dma_addr_t dma = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BuffData);
1506                                 void *rxbuf = rxbuf_bus_to_virt(lp, dma);
1507                                 if (offset + len > pkt_len)
1508                                         len = pkt_len - offset;
1509 #ifdef TC35815_DMA_SYNC_ONDEMAND
1510                                 pci_dma_sync_single_for_cpu(lp->pci_dev,
1511                                                             dma, len,
1512                                                             PCI_DMA_FROMDEVICE);
1513 #endif
1514                                 memcpy(data + offset, rxbuf, len);
1515 #ifdef TC35815_DMA_SYNC_ONDEMAND
1516                                 pci_dma_sync_single_for_device(lp->pci_dev,
1517                                                                dma, len,
1518                                                                PCI_DMA_FROMDEVICE);
1519 #endif
1520                                 offset += len;
1521                                 cur_bd++;
1522                         }
1523 #else /* TC35815_USE_PACKEDBUFFER */
1524                         BUG_ON(bd_count > 1);
1525                         cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
1526                                   & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1527 #ifdef DEBUG
1528                         if (cur_bd >= RX_BUF_NUM) {
1529                                 printk("%s: invalid BDID.\n", dev->name);
1530                                 panic_queues(dev);
1531                         }
1532                         BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
1533                                (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
1534                         if (!lp->rx_skbs[cur_bd].skb) {
1535                                 printk("%s: NULL skb.\n", dev->name);
1536                                 panic_queues(dev);
1537                         }
1538 #else
1539                         BUG_ON(cur_bd >= RX_BUF_NUM);
1540 #endif
1541                         skb = lp->rx_skbs[cur_bd].skb;
1542                         prefetch(skb->data);
1543                         lp->rx_skbs[cur_bd].skb = NULL;
1544                         lp->fbl_count--;
1545                         pci_unmap_single(lp->pci_dev,
1546                                          lp->rx_skbs[cur_bd].skb_dma,
1547                                          RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1548                         if (!HAVE_DMA_RXALIGN(lp))
1549                                 memmove(skb->data, skb->data - 2, pkt_len);
1550                         data = skb_put(skb, pkt_len);
1551 #endif /* TC35815_USE_PACKEDBUFFER */
1552                         if (netif_msg_pktdata(lp))
1553                                 print_eth(data);
1554                         skb->protocol = eth_type_trans(skb, dev);
1555 #ifdef TC35815_NAPI
1556                         netif_receive_skb(skb);
1557                         received++;
1558 #else
1559                         netif_rx(skb);
1560 #endif
1561                         dev->last_rx = jiffies;
1562                         lp->stats.rx_packets++;
1563                         lp->stats.rx_bytes += pkt_len;
1564                 } else {
1565                         lp->stats.rx_errors++;
1566                         printk(KERN_DEBUG "%s: Rx error (status %x)\n",
1567                                dev->name, status & Rx_Stat_Mask);
1568                         /* WORKAROUND: LongErr and CRCErr means Overflow. */
1569                         if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
1570                                 status &= ~(Rx_LongErr|Rx_CRCErr);
1571                                 status |= Rx_Over;
1572                         }
1573                         if (status & Rx_LongErr) lp->stats.rx_length_errors++;
1574                         if (status & Rx_Over) lp->stats.rx_fifo_errors++;
1575                         if (status & Rx_CRCErr) lp->stats.rx_crc_errors++;
1576                         if (status & Rx_Align) lp->stats.rx_frame_errors++;
1577                 }
1578
1579                 if (bd_count > 0) {
1580                         /* put Free Buffer back to controller */
1581                         int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
1582                         unsigned char id =
1583                                 (bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1584 #ifdef DEBUG
1585                         if (id >= RX_BUF_NUM) {
1586                                 printk("%s: invalid BDID.\n", dev->name);
1587                                 panic_queues(dev);
1588                         }
1589 #else
1590                         BUG_ON(id >= RX_BUF_NUM);
1591 #endif
1592                         /* free old buffers */
1593 #ifdef TC35815_USE_PACKEDBUFFER
1594                         while (lp->fbl_curid != id)
1595 #else
1596                         while (lp->fbl_count < RX_BUF_NUM)
1597 #endif
1598                         {
1599 #ifdef TC35815_USE_PACKEDBUFFER
1600                                 unsigned char curid = lp->fbl_curid;
1601 #else
1602                                 unsigned char curid =
1603                                         (id + 1 + lp->fbl_count) % RX_BUF_NUM;
1604 #endif
1605                                 struct BDesc *bd = &lp->fbl_ptr->bd[curid];
1606 #ifdef DEBUG
1607                                 bdctl = le32_to_cpu(bd->BDCtl);
1608                                 if (bdctl & BD_CownsBD) {
1609                                         printk("%s: Freeing invalid BD.\n",
1610                                                dev->name);
1611                                         panic_queues(dev);
1612                                 }
1613 #endif
1614                                 /* pass BD to controler */
1615 #ifndef TC35815_USE_PACKEDBUFFER
1616                                 if (!lp->rx_skbs[curid].skb) {
1617                                         lp->rx_skbs[curid].skb =
1618                                                 alloc_rxbuf_skb(dev,
1619                                                                 lp->pci_dev,
1620                                                                 &lp->rx_skbs[curid].skb_dma);
1621                                         if (!lp->rx_skbs[curid].skb)
1622                                                 break; /* try on next reception */
1623                                         bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
1624                                 }
1625 #endif /* TC35815_USE_PACKEDBUFFER */
1626                                 /* Note: BDLength was modified by chip. */
1627                                 bd->BDCtl = cpu_to_le32(BD_CownsBD |
1628                                                         (curid << BD_RxBDID_SHIFT) |
1629                                                         RX_BUF_SIZE);
1630 #ifdef TC35815_USE_PACKEDBUFFER
1631                                 lp->fbl_curid = (curid + 1) % RX_BUF_NUM;
1632                                 if (netif_msg_rx_status(lp)) {
1633                                         printk("%s: Entering new FBD %d\n",
1634                                                dev->name, lp->fbl_curid);
1635                                         dump_frfd(lp->fbl_ptr);
1636                                 }
1637 #else
1638                                 lp->fbl_count++;
1639 #endif
1640                                 buf_free_count++;
1641                         }
1642                 }
1643
1644                 /* put RxFD back to controller */
1645 #ifdef DEBUG
1646                 next_rfd = fd_bus_to_virt(lp,
1647                                           le32_to_cpu(lp->rfd_cur->fd.FDNext));
1648                 if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
1649                         printk("%s: RxFD FDNext invalid.\n", dev->name);
1650                         panic_queues(dev);
1651                 }
1652 #endif
1653                 for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
1654                         /* pass FD to controler */
1655 #ifdef DEBUG
1656                         lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
1657 #else
1658                         lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
1659 #endif
1660                         lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
1661                         lp->rfd_cur++;
1662                         fd_free_count++;
1663                 }
1664                 if (lp->rfd_cur > lp->rfd_limit)
1665                         lp->rfd_cur = lp->rfd_base;
1666 #ifdef DEBUG
1667                 if (lp->rfd_cur != next_rfd)
1668                         printk("rfd_cur = %p, next_rfd %p\n",
1669                                lp->rfd_cur, next_rfd);
1670 #endif
1671         }
1672
1673         /* re-enable BL/FDA Exhaust interrupts. */
1674         if (fd_free_count) {
1675                 struct tc35815_regs __iomem *tr =
1676                         (struct tc35815_regs __iomem *)dev->base_addr;
1677                 u32 en, en_old = tc_readl(&tr->Int_En);
1678                 en = en_old | Int_FDAExEn;
1679                 if (buf_free_count)
1680                         en |= Int_BLExEn;
1681                 if (en != en_old)
1682                         tc_writel(en, &tr->Int_En);
1683         }
1684 #ifdef TC35815_NAPI
1685         return received;
1686 #endif
1687 }
1688
1689 #ifdef TC35815_NAPI
1690 static int
1691 tc35815_poll(struct net_device *dev, int *budget)
1692 {
1693         struct tc35815_local *lp = dev->priv;
1694         struct tc35815_regs __iomem *tr =
1695                 (struct tc35815_regs __iomem *)dev->base_addr;
1696         int limit = min(*budget, dev->quota);
1697         int received = 0, handled;
1698         u32 status;
1699
1700         spin_lock(&lp->lock);
1701         status = tc_readl(&tr->Int_Src);
1702         do {
1703                 tc_writel(status, &tr->Int_Src);        /* write to clear */
1704
1705                 handled = tc35815_do_interrupt(dev, status, limit);
1706                 if (handled >= 0) {
1707                         received += handled;
1708                         limit -= handled;
1709                         if (limit <= 0)
1710                                 break;
1711                 }
1712                 status = tc_readl(&tr->Int_Src);
1713         } while (status);
1714         spin_unlock(&lp->lock);
1715
1716         dev->quota -= received;
1717         *budget -= received;
1718         if (limit <= 0)
1719                 return 1;
1720
1721         netif_rx_complete(dev);
1722         /* enable interrupts */
1723         tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
1724         return 0;
1725 }
1726 #endif
1727
1728 #ifdef NO_CHECK_CARRIER
1729 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1730 #else
1731 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1732 #endif
1733
1734 static void
1735 tc35815_check_tx_stat(struct net_device *dev, int status)
1736 {
1737         struct tc35815_local *lp = dev->priv;
1738         const char *msg = NULL;
1739
1740         /* count collisions */
1741         if (status & Tx_ExColl)
1742                 lp->stats.collisions += 16;
1743         if (status & Tx_TxColl_MASK)
1744                 lp->stats.collisions += status & Tx_TxColl_MASK;
1745
1746 #ifndef NO_CHECK_CARRIER
1747         /* TX4939 does not have NCarr */
1748         if (lp->boardtype == TC35815_TX4939)
1749                 status &= ~Tx_NCarr;
1750 #ifdef WORKAROUND_LOSTCAR
1751         /* WORKAROUND: ignore LostCrS in full duplex operation */
1752         if ((lp->timer_state != asleep && lp->timer_state != lcheck)
1753             || lp->fullduplex)
1754                 status &= ~Tx_NCarr;
1755 #endif
1756 #endif
1757
1758         if (!(status & TX_STA_ERR)) {
1759                 /* no error. */
1760                 lp->stats.tx_packets++;
1761                 return;
1762         }
1763
1764         lp->stats.tx_errors++;
1765         if (status & Tx_ExColl) {
1766                 lp->stats.tx_aborted_errors++;
1767                 msg = "Excessive Collision.";
1768         }
1769         if (status & Tx_Under) {
1770                 lp->stats.tx_fifo_errors++;
1771                 msg = "Tx FIFO Underrun.";
1772                 if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
1773                         lp->lstats.tx_underrun++;
1774                         if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
1775                                 struct tc35815_regs __iomem *tr =
1776                                         (struct tc35815_regs __iomem *)dev->base_addr;
1777                                 tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
1778                                 msg = "Tx FIFO Underrun.Change Tx threshold to max.";
1779                         }
1780                 }
1781         }
1782         if (status & Tx_Defer) {
1783                 lp->stats.tx_fifo_errors++;
1784                 msg = "Excessive Deferral.";
1785         }
1786 #ifndef NO_CHECK_CARRIER
1787         if (status & Tx_NCarr) {
1788                 lp->stats.tx_carrier_errors++;
1789                 msg = "Lost Carrier Sense.";
1790         }
1791 #endif
1792         if (status & Tx_LateColl) {
1793                 lp->stats.tx_aborted_errors++;
1794                 msg = "Late Collision.";
1795         }
1796         if (status & Tx_TxPar) {
1797                 lp->stats.tx_fifo_errors++;
1798                 msg = "Transmit Parity Error.";
1799         }
1800         if (status & Tx_SQErr) {
1801                 lp->stats.tx_heartbeat_errors++;
1802                 msg = "Signal Quality Error.";
1803         }
1804         if (msg && netif_msg_tx_err(lp))
1805                 printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
1806 }
1807
1808 /* This handles TX complete events posted by the device
1809  * via interrupts.
1810  */
1811 static void
1812 tc35815_txdone(struct net_device *dev)
1813 {
1814         struct tc35815_local *lp = dev->priv;
1815         struct TxFD *txfd;
1816         unsigned int fdctl;
1817
1818         txfd = &lp->tfd_base[lp->tfd_end];
1819         while (lp->tfd_start != lp->tfd_end &&
1820                !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
1821                 int status = le32_to_cpu(txfd->fd.FDStat);
1822                 struct sk_buff *skb;
1823                 unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
1824                 u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
1825
1826                 if (netif_msg_tx_done(lp)) {
1827                         printk("%s: complete TxFD.\n", dev->name);
1828                         dump_txfd(txfd);
1829                 }
1830                 tc35815_check_tx_stat(dev, status);
1831
1832                 skb = fdsystem != 0xffffffff ?
1833                         lp->tx_skbs[fdsystem].skb : NULL;
1834 #ifdef DEBUG
1835                 if (lp->tx_skbs[lp->tfd_end].skb != skb) {
1836                         printk("%s: tx_skbs mismatch.\n", dev->name);
1837                         panic_queues(dev);
1838                 }
1839 #else
1840                 BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
1841 #endif
1842                 if (skb) {
1843                         lp->stats.tx_bytes += skb->len;
1844                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
1845                         lp->tx_skbs[lp->tfd_end].skb = NULL;
1846                         lp->tx_skbs[lp->tfd_end].skb_dma = 0;
1847 #ifdef TC35815_NAPI
1848                         dev_kfree_skb_any(skb);
1849 #else
1850                         dev_kfree_skb_irq(skb);
1851 #endif
1852                 }
1853                 txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
1854
1855                 lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
1856                 txfd = &lp->tfd_base[lp->tfd_end];
1857 #ifdef DEBUG
1858                 if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
1859                         printk("%s: TxFD FDNext invalid.\n", dev->name);
1860                         panic_queues(dev);
1861                 }
1862 #endif
1863                 if (fdnext & FD_Next_EOL) {
1864                         /* DMA Transmitter has been stopping... */
1865                         if (lp->tfd_end != lp->tfd_start) {
1866                                 struct tc35815_regs __iomem *tr =
1867                                         (struct tc35815_regs __iomem *)dev->base_addr;
1868                                 int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
1869                                 struct TxFD* txhead = &lp->tfd_base[head];
1870                                 int qlen = (lp->tfd_start + TX_FD_NUM
1871                                             - lp->tfd_end) % TX_FD_NUM;
1872
1873 #ifdef DEBUG
1874                                 if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
1875                                         printk("%s: TxFD FDCtl invalid.\n", dev->name);
1876                                         panic_queues(dev);
1877                                 }
1878 #endif
1879                                 /* log max queue length */
1880                                 if (lp->lstats.max_tx_qlen < qlen)
1881                                         lp->lstats.max_tx_qlen = qlen;
1882
1883
1884                                 /* start DMA Transmitter again */
1885                                 txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1886 #ifdef GATHER_TXINT
1887                                 txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1888 #endif
1889                                 if (netif_msg_tx_queued(lp)) {
1890                                         printk("%s: start TxFD on queue.\n",
1891                                                dev->name);
1892                                         dump_txfd(txfd);
1893                                 }
1894                                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1895                         }
1896                         break;
1897                 }
1898         }
1899
1900         /* If we had stopped the queue due to a "tx full"
1901          * condition, and space has now been made available,
1902          * wake up the queue.
1903          */
1904         if (netif_queue_stopped(dev) && ! tc35815_tx_full(dev))
1905                 netif_wake_queue(dev);
1906 }
1907
1908 /* The inverse routine to tc35815_open(). */
1909 static int
1910 tc35815_close(struct net_device *dev)
1911 {
1912         struct tc35815_local *lp = dev->priv;
1913         netif_stop_queue(dev);
1914
1915         /* Flush the Tx and disable Rx here. */
1916
1917         del_timer(&lp->timer);          /* Kill if running      */
1918         tc35815_chip_reset(dev);
1919         free_irq(dev->irq, dev);
1920
1921         tc35815_free_queues(dev);
1922
1923         return 0;
1924
1925 }
1926
1927 /*
1928  * Get the current statistics.
1929  * This may be called with the card open or closed.
1930  */
1931 static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
1932 {
1933         struct tc35815_local *lp = dev->priv;
1934         struct tc35815_regs __iomem *tr =
1935                 (struct tc35815_regs __iomem *)dev->base_addr;
1936         if (netif_running(dev)) {
1937                 /* Update the statistics from the device registers. */
1938                 lp->stats.rx_missed_errors = tc_readl(&tr->Miss_Cnt);
1939         }
1940
1941         return &lp->stats;
1942 }
1943
1944 static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
1945 {
1946         struct tc35815_local *lp = dev->priv;
1947         struct tc35815_regs __iomem *tr =
1948                 (struct tc35815_regs __iomem *)dev->base_addr;
1949         int cam_index = index * 6;
1950         u32 cam_data;
1951         u32 saved_addr;
1952         saved_addr = tc_readl(&tr->CAM_Adr);
1953
1954         if (netif_msg_hw(lp)) {
1955                 int i;
1956                 printk(KERN_DEBUG "%s: CAM %d:", dev->name, index);
1957                 for (i = 0; i < 6; i++)
1958                         printk(" %02x", addr[i]);
1959                 printk("\n");
1960         }
1961         if (index & 1) {
1962                 /* read modify write */
1963                 tc_writel(cam_index - 2, &tr->CAM_Adr);
1964                 cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
1965                 cam_data |= addr[0] << 8 | addr[1];
1966                 tc_writel(cam_data, &tr->CAM_Data);
1967                 /* write whole word */
1968                 tc_writel(cam_index + 2, &tr->CAM_Adr);
1969                 cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
1970                 tc_writel(cam_data, &tr->CAM_Data);
1971         } else {
1972                 /* write whole word */
1973                 tc_writel(cam_index, &tr->CAM_Adr);
1974                 cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
1975                 tc_writel(cam_data, &tr->CAM_Data);
1976                 /* read modify write */
1977                 tc_writel(cam_index + 4, &tr->CAM_Adr);
1978                 cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
1979                 cam_data |= addr[4] << 24 | (addr[5] << 16);
1980                 tc_writel(cam_data, &tr->CAM_Data);
1981         }
1982
1983         tc_writel(saved_addr, &tr->CAM_Adr);
1984 }
1985
1986
1987 /*
1988  * Set or clear the multicast filter for this adaptor.
1989  * num_addrs == -1      Promiscuous mode, receive all packets
1990  * num_addrs == 0       Normal mode, clear multicast list
1991  * num_addrs > 0        Multicast mode, receive normal and MC packets,
1992  *                      and do best-effort filtering.
1993  */
1994 static void
1995 tc35815_set_multicast_list(struct net_device *dev)
1996 {
1997         struct tc35815_regs __iomem *tr =
1998                 (struct tc35815_regs __iomem *)dev->base_addr;
1999
2000         if (dev->flags&IFF_PROMISC)
2001         {
2002 #ifdef WORKAROUND_100HALF_PROMISC
2003                 /* With some (all?) 100MHalf HUB, controller will hang
2004                  * if we enabled promiscuous mode before linkup... */
2005                 struct tc35815_local *lp = dev->priv;
2006                 int pid = lp->phy_addr;
2007                 if (!(tc_mdio_read(dev, pid, MII_BMSR) & BMSR_LSTATUS))
2008                         return;
2009 #endif
2010                 /* Enable promiscuous mode */
2011                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
2012         }
2013         else if((dev->flags&IFF_ALLMULTI) || dev->mc_count > CAM_ENTRY_MAX - 3)
2014         {
2015                 /* CAM 0, 1, 20 are reserved. */
2016                 /* Disable promiscuous mode, use normal mode. */
2017                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
2018         }
2019         else if(dev->mc_count)
2020         {
2021                 struct dev_mc_list* cur_addr = dev->mc_list;
2022                 int i;
2023                 int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
2024
2025                 tc_writel(0, &tr->CAM_Ctl);
2026                 /* Walk the address list, and load the filter */
2027                 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
2028                         if (!cur_addr)
2029                                 break;
2030                         /* entry 0,1 is reserved. */
2031                         tc35815_set_cam_entry(dev, i + 2, cur_addr->dmi_addr);
2032                         ena_bits |= CAM_Ena_Bit(i + 2);
2033                 }
2034                 tc_writel(ena_bits, &tr->CAM_Ena);
2035                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2036         }
2037         else {
2038                 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2039                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2040         }
2041 }
2042
2043 static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2044 {
2045         struct tc35815_local *lp = dev->priv;
2046         strcpy(info->driver, MODNAME);
2047         strcpy(info->version, DRV_VERSION);
2048         strcpy(info->bus_info, pci_name(lp->pci_dev));
2049 }
2050
2051 static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2052 {
2053         struct tc35815_local *lp = dev->priv;
2054         spin_lock_irq(&lp->lock);
2055         mii_ethtool_gset(&lp->mii, cmd);
2056         spin_unlock_irq(&lp->lock);
2057         return 0;
2058 }
2059
2060 static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2061 {
2062         struct tc35815_local *lp = dev->priv;
2063         int rc;
2064 #if 1   /* use our negotiation method... */
2065         /* Verify the settings we care about. */
2066         if (cmd->autoneg != AUTONEG_ENABLE &&
2067             cmd->autoneg != AUTONEG_DISABLE)
2068                 return -EINVAL;
2069         if (cmd->autoneg == AUTONEG_DISABLE &&
2070             ((cmd->speed != SPEED_100 &&
2071               cmd->speed != SPEED_10) ||
2072              (cmd->duplex != DUPLEX_HALF &&
2073               cmd->duplex != DUPLEX_FULL)))
2074                 return -EINVAL;
2075
2076         /* Ok, do it to it. */
2077         spin_lock_irq(&lp->lock);
2078         del_timer(&lp->timer);
2079         tc35815_start_auto_negotiation(dev, cmd);
2080         spin_unlock_irq(&lp->lock);
2081         rc = 0;
2082 #else
2083         spin_lock_irq(&lp->lock);
2084         rc = mii_ethtool_sset(&lp->mii, cmd);
2085         spin_unlock_irq(&lp->lock);
2086 #endif
2087         return rc;
2088 }
2089
2090 static int tc35815_nway_reset(struct net_device *dev)
2091 {
2092         struct tc35815_local *lp = dev->priv;
2093         int rc;
2094         spin_lock_irq(&lp->lock);
2095         rc = mii_nway_restart(&lp->mii);
2096         spin_unlock_irq(&lp->lock);
2097         return rc;
2098 }
2099
2100 static u32 tc35815_get_link(struct net_device *dev)
2101 {
2102         struct tc35815_local *lp = dev->priv;
2103         int rc;
2104         spin_lock_irq(&lp->lock);
2105         rc = mii_link_ok(&lp->mii);
2106         spin_unlock_irq(&lp->lock);
2107         return rc;
2108 }
2109
2110 static u32 tc35815_get_msglevel(struct net_device *dev)
2111 {
2112         struct tc35815_local *lp = dev->priv;
2113         return lp->msg_enable;
2114 }
2115
2116 static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
2117 {
2118         struct tc35815_local *lp = dev->priv;
2119         lp->msg_enable = datum;
2120 }
2121
2122 static int tc35815_get_stats_count(struct net_device *dev)
2123 {
2124         struct tc35815_local *lp = dev->priv;
2125         return sizeof(lp->lstats) / sizeof(int);
2126 }
2127
2128 static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2129 {
2130         struct tc35815_local *lp = dev->priv;
2131         data[0] = lp->lstats.max_tx_qlen;
2132         data[1] = lp->lstats.tx_ints;
2133         data[2] = lp->lstats.rx_ints;
2134         data[3] = lp->lstats.tx_underrun;
2135 }
2136
2137 static struct {
2138         const char str[ETH_GSTRING_LEN];
2139 } ethtool_stats_keys[] = {
2140         { "max_tx_qlen" },
2141         { "tx_ints" },
2142         { "rx_ints" },
2143         { "tx_underrun" },
2144 };
2145
2146 static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2147 {
2148         memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2149 }
2150
2151 static const struct ethtool_ops tc35815_ethtool_ops = {
2152         .get_drvinfo            = tc35815_get_drvinfo,
2153         .get_settings           = tc35815_get_settings,
2154         .set_settings           = tc35815_set_settings,
2155         .nway_reset             = tc35815_nway_reset,
2156         .get_link               = tc35815_get_link,
2157         .get_msglevel           = tc35815_get_msglevel,
2158         .set_msglevel           = tc35815_set_msglevel,
2159         .get_strings            = tc35815_get_strings,
2160         .get_stats_count        = tc35815_get_stats_count,
2161         .get_ethtool_stats      = tc35815_get_ethtool_stats,
2162         .get_perm_addr          = ethtool_op_get_perm_addr,
2163 };
2164
2165 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2166 {
2167         struct tc35815_local *lp = dev->priv;
2168         int rc;
2169
2170         if (!netif_running(dev))
2171                 return -EINVAL;
2172
2173         spin_lock_irq(&lp->lock);
2174         rc = generic_mii_ioctl(&lp->mii, if_mii(rq), cmd, NULL);
2175         spin_unlock_irq(&lp->lock);
2176
2177         return rc;
2178 }
2179
2180 static int tc_mdio_read(struct net_device *dev, int phy_id, int location)
2181 {
2182         struct tc35815_regs __iomem *tr =
2183                 (struct tc35815_regs __iomem *)dev->base_addr;
2184         u32 data;
2185         tc_writel(MD_CA_Busy | (phy_id << 5) | location, &tr->MD_CA);
2186         while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
2187                 ;
2188         data = tc_readl(&tr->MD_Data);
2189         return data & 0xffff;
2190 }
2191
2192 static void tc_mdio_write(struct net_device *dev, int phy_id, int location,
2193                           int val)
2194 {
2195         struct tc35815_regs __iomem *tr =
2196                 (struct tc35815_regs __iomem *)dev->base_addr;
2197         tc_writel(val, &tr->MD_Data);
2198         tc_writel(MD_CA_Busy | MD_CA_Wr | (phy_id << 5) | location, &tr->MD_CA);
2199         while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
2200                 ;
2201 }
2202
2203 /* Auto negotiation.  The scheme is very simple.  We have a timer routine
2204  * that keeps watching the auto negotiation process as it progresses.
2205  * The DP83840 is first told to start doing it's thing, we set up the time
2206  * and place the timer state machine in it's initial state.
2207  *
2208  * Here the timer peeks at the DP83840 status registers at each click to see
2209  * if the auto negotiation has completed, we assume here that the DP83840 PHY
2210  * will time out at some point and just tell us what (didn't) happen.  For
2211  * complete coverage we only allow so many of the ticks at this level to run,
2212  * when this has expired we print a warning message and try another strategy.
2213  * This "other" strategy is to force the interface into various speed/duplex
2214  * configurations and we stop when we see a link-up condition before the
2215  * maximum number of "peek" ticks have occurred.
2216  *
2217  * Once a valid link status has been detected we configure the BigMAC and
2218  * the rest of the Happy Meal to speak the most efficient protocol we could
2219  * get a clean link for.  The priority for link configurations, highest first
2220  * is:
2221  *                 100 Base-T Full Duplex
2222  *                 100 Base-T Half Duplex
2223  *                 10 Base-T Full Duplex
2224  *                 10 Base-T Half Duplex
2225  *
2226  * We start a new timer now, after a successful auto negotiation status has
2227  * been detected.  This timer just waits for the link-up bit to get set in
2228  * the BMCR of the DP83840.  When this occurs we print a kernel log message
2229  * describing the link type in use and the fact that it is up.
2230  *
2231  * If a fatal error of some sort is signalled and detected in the interrupt
2232  * service routine, and the chip is reset, or the link is ifconfig'd down
2233  * and then back up, this entire process repeats itself all over again.
2234  */
2235 /* Note: Above comments are come from sunhme driver. */
2236
2237 static int tc35815_try_next_permutation(struct net_device *dev)
2238 {
2239         struct tc35815_local *lp = dev->priv;
2240         int pid = lp->phy_addr;
2241         unsigned short bmcr;
2242
2243         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2244
2245         /* Downgrade from full to half duplex.  Only possible via ethtool.  */
2246         if (bmcr & BMCR_FULLDPLX) {
2247                 bmcr &= ~BMCR_FULLDPLX;
2248                 printk(KERN_DEBUG "%s: try next permutation (BMCR %x)\n", dev->name, bmcr);
2249                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2250                 return 0;
2251         }
2252
2253         /* Downgrade from 100 to 10. */
2254         if (bmcr & BMCR_SPEED100) {
2255                 bmcr &= ~BMCR_SPEED100;
2256                 printk(KERN_DEBUG "%s: try next permutation (BMCR %x)\n", dev->name, bmcr);
2257                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2258                 return 0;
2259         }
2260
2261         /* We've tried everything. */
2262         return -1;
2263 }
2264
2265 static void
2266 tc35815_display_link_mode(struct net_device *dev)
2267 {
2268         struct tc35815_local *lp = dev->priv;
2269         int pid = lp->phy_addr;
2270         unsigned short lpa, bmcr;
2271         char *speed = "", *duplex = "";
2272
2273         lpa = tc_mdio_read(dev, pid, MII_LPA);
2274         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2275         if (options.speed ? (bmcr & BMCR_SPEED100) : (lpa & (LPA_100HALF | LPA_100FULL)))
2276                 speed = "100Mb/s";
2277         else
2278                 speed = "10Mb/s";
2279         if (options.duplex ? (bmcr & BMCR_FULLDPLX) : (lpa & (LPA_100FULL | LPA_10FULL)))
2280                 duplex = "Full Duplex";
2281         else
2282                 duplex = "Half Duplex";
2283
2284         if (netif_msg_link(lp))
2285                 printk(KERN_INFO "%s: Link is up at %s, %s.\n",
2286                        dev->name, speed, duplex);
2287         printk(KERN_DEBUG "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
2288                dev->name,
2289                bmcr, tc_mdio_read(dev, pid, MII_BMSR), lpa);
2290 }
2291
2292 static void tc35815_display_forced_link_mode(struct net_device *dev)
2293 {
2294         struct tc35815_local *lp = dev->priv;
2295         int pid = lp->phy_addr;
2296         unsigned short bmcr;
2297         char *speed = "", *duplex = "";
2298
2299         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2300         if (bmcr & BMCR_SPEED100)
2301                 speed = "100Mb/s";
2302         else
2303                 speed = "10Mb/s";
2304         if (bmcr & BMCR_FULLDPLX)
2305                 duplex = "Full Duplex.\n";
2306         else
2307                 duplex = "Half Duplex.\n";
2308
2309         if (netif_msg_link(lp))
2310                 printk(KERN_INFO "%s: Link has been forced up at %s, %s",
2311                        dev->name, speed, duplex);
2312 }
2313
2314 static void tc35815_set_link_modes(struct net_device *dev)
2315 {
2316         struct tc35815_local *lp = dev->priv;
2317         struct tc35815_regs __iomem *tr =
2318                 (struct tc35815_regs __iomem *)dev->base_addr;
2319         int pid = lp->phy_addr;
2320         unsigned short bmcr, lpa;
2321         int speed;
2322
2323         if (lp->timer_state == arbwait) {
2324                 lpa = tc_mdio_read(dev, pid, MII_LPA);
2325                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2326                 printk(KERN_DEBUG "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
2327                        dev->name,
2328                        bmcr, tc_mdio_read(dev, pid, MII_BMSR), lpa);
2329                 if (!(lpa & (LPA_10HALF | LPA_10FULL |
2330                              LPA_100HALF | LPA_100FULL))) {
2331                         /* fall back to 10HALF */
2332                         printk(KERN_INFO "%s: bad ability %04x - falling back to 10HD.\n",
2333                                dev->name, lpa);
2334                         lpa = LPA_10HALF;
2335                 }
2336                 if (options.duplex ? (bmcr & BMCR_FULLDPLX) : (lpa & (LPA_100FULL | LPA_10FULL)))
2337                         lp->fullduplex = 1;
2338                 else
2339                         lp->fullduplex = 0;
2340                 if (options.speed ? (bmcr & BMCR_SPEED100) : (lpa & (LPA_100HALF | LPA_100FULL)))
2341                         speed = 100;
2342                 else
2343                         speed = 10;
2344         } else {
2345                 /* Forcing a link mode. */
2346                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2347                 if (bmcr & BMCR_FULLDPLX)
2348                         lp->fullduplex = 1;
2349                 else
2350                         lp->fullduplex = 0;
2351                 if (bmcr & BMCR_SPEED100)
2352                         speed = 100;
2353                 else
2354                         speed = 10;
2355         }
2356
2357         tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_HaltReq, &tr->MAC_Ctl);
2358         if (lp->fullduplex) {
2359                 tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_FullDup, &tr->MAC_Ctl);
2360         } else {
2361                 tc_writel(tc_readl(&tr->MAC_Ctl) & ~MAC_FullDup, &tr->MAC_Ctl);
2362         }
2363         tc_writel(tc_readl(&tr->MAC_Ctl) & ~MAC_HaltReq, &tr->MAC_Ctl);
2364
2365         /* TX4939 PCFG.SPEEDn bit will be changed on NETDEV_CHANGE event. */
2366
2367 #ifndef NO_CHECK_CARRIER
2368         /* TX4939 does not have EnLCarr */
2369         if (lp->boardtype != TC35815_TX4939) {
2370 #ifdef WORKAROUND_LOSTCAR
2371                 /* WORKAROUND: enable LostCrS only if half duplex operation */
2372                 if (!lp->fullduplex && lp->boardtype != TC35815_TX4939)
2373                         tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr, &tr->Tx_Ctl);
2374 #endif
2375         }
2376 #endif
2377         lp->mii.full_duplex = lp->fullduplex;
2378 }
2379
2380 static void tc35815_timer(unsigned long data)
2381 {
2382         struct net_device *dev = (struct net_device *)data;
2383         struct tc35815_local *lp = dev->priv;
2384         int pid = lp->phy_addr;
2385         unsigned short bmsr, bmcr, lpa;
2386         int restart_timer = 0;
2387
2388         spin_lock_irq(&lp->lock);
2389
2390         lp->timer_ticks++;
2391         switch (lp->timer_state) {
2392         case arbwait:
2393                 /*
2394                  * Only allow for 5 ticks, thats 10 seconds and much too
2395                  * long to wait for arbitration to complete.
2396                  */
2397                 /* TC35815 need more times... */
2398                 if (lp->timer_ticks >= 10) {
2399                         /* Enter force mode. */
2400                         if (!options.doforce) {
2401                                 printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful,"
2402                                        " cable probblem?\n", dev->name);
2403                                 /* Try to restart the adaptor. */
2404                                 tc35815_restart(dev);
2405                                 goto out;
2406                         }
2407                         printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful,"
2408                                " trying force link mode\n", dev->name);
2409                         printk(KERN_DEBUG "%s: BMCR %x BMSR %x\n", dev->name,
2410                                tc_mdio_read(dev, pid, MII_BMCR),
2411                                tc_mdio_read(dev, pid, MII_BMSR));
2412                         bmcr = BMCR_SPEED100;
2413                         tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2414
2415                         /*
2416                          * OK, seems we need do disable the transceiver
2417                          * for the first tick to make sure we get an
2418                          * accurate link state at the second tick.
2419                          */
2420
2421                         lp->timer_state = ltrywait;
2422                         lp->timer_ticks = 0;
2423                         restart_timer = 1;
2424                 } else {
2425                         /* Anything interesting happen? */
2426                         bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2427                         if (bmsr & BMSR_ANEGCOMPLETE) {
2428                                 /* Just what we've been waiting for... */
2429                                 tc35815_set_link_modes(dev);
2430
2431                                 /*
2432                                  * Success, at least so far, advance our state
2433                                  * engine.
2434                                  */
2435                                 lp->timer_state = lupwait;
2436                                 restart_timer = 1;
2437                         } else {
2438                                 restart_timer = 1;
2439                         }
2440                 }
2441                 break;
2442
2443         case lupwait:
2444                 /*
2445                  * Auto negotiation was successful and we are awaiting a
2446                  * link up status.  I have decided to let this timer run
2447                  * forever until some sort of error is signalled, reporting
2448                  * a message to the user at 10 second intervals.
2449                  */
2450                 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2451                 if (bmsr & BMSR_LSTATUS) {
2452                         /*
2453                          * Wheee, it's up, display the link mode in use and put
2454                          * the timer to sleep.
2455                          */
2456                         tc35815_display_link_mode(dev);
2457                         netif_carrier_on(dev);
2458 #ifdef WORKAROUND_100HALF_PROMISC
2459                         /* delayed promiscuous enabling */
2460                         if (dev->flags & IFF_PROMISC)
2461                                 tc35815_set_multicast_list(dev);
2462 #endif
2463 #if 1
2464                         lp->saved_lpa = tc_mdio_read(dev, pid, MII_LPA);
2465                         lp->timer_state = lcheck;
2466                         restart_timer = 1;
2467 #else
2468                         lp->timer_state = asleep;
2469                         restart_timer = 0;
2470 #endif
2471                 } else {
2472                         if (lp->timer_ticks >= 10) {
2473                                 printk(KERN_NOTICE "%s: Auto negotiation successful, link still "
2474                                        "not completely up.\n", dev->name);
2475                                 lp->timer_ticks = 0;
2476                                 restart_timer = 1;
2477                         } else {
2478                                 restart_timer = 1;
2479                         }
2480                 }
2481                 break;
2482
2483         case ltrywait:
2484                 /*
2485                  * Making the timeout here too long can make it take
2486                  * annoyingly long to attempt all of the link mode
2487                  * permutations, but then again this is essentially
2488                  * error recovery code for the most part.
2489                  */
2490                 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2491                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2492                 if (lp->timer_ticks == 1) {
2493                         /*
2494                          * Re-enable transceiver, we'll re-enable the
2495                          * transceiver next tick, then check link state
2496                          * on the following tick.
2497                          */
2498                         restart_timer = 1;
2499                         break;
2500                 }
2501                 if (lp->timer_ticks == 2) {
2502                         restart_timer = 1;
2503                         break;
2504                 }
2505                 if (bmsr & BMSR_LSTATUS) {
2506                         /* Force mode selection success. */
2507                         tc35815_display_forced_link_mode(dev);
2508                         netif_carrier_on(dev);
2509                         tc35815_set_link_modes(dev);
2510 #ifdef WORKAROUND_100HALF_PROMISC
2511                         /* delayed promiscuous enabling */
2512                         if (dev->flags & IFF_PROMISC)
2513                                 tc35815_set_multicast_list(dev);
2514 #endif
2515 #if 1
2516                         lp->saved_lpa = tc_mdio_read(dev, pid, MII_LPA);
2517                         lp->timer_state = lcheck;
2518                         restart_timer = 1;
2519 #else
2520                         lp->timer_state = asleep;
2521                         restart_timer = 0;
2522 #endif
2523                 } else {
2524                         if (lp->timer_ticks >= 4) { /* 6 seconds or so... */
2525                                 int ret;
2526
2527                                 ret = tc35815_try_next_permutation(dev);
2528                                 if (ret == -1) {
2529                                         /*
2530                                          * Aieee, tried them all, reset the
2531                                          * chip and try all over again.
2532                                          */
2533                                         printk(KERN_NOTICE "%s: Link down, "
2534                                                "cable problem?\n",
2535                                                dev->name);
2536
2537                                         /* Try to restart the adaptor. */
2538                                         tc35815_restart(dev);
2539                                         goto out;
2540                                 }
2541                                 lp->timer_ticks = 0;
2542                                 restart_timer = 1;
2543                         } else {
2544                                 restart_timer = 1;
2545                         }
2546                 }
2547                 break;
2548
2549         case lcheck:
2550                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2551                 lpa = tc_mdio_read(dev, pid, MII_LPA);
2552                 if (bmcr & (BMCR_PDOWN | BMCR_ISOLATE | BMCR_RESET)) {
2553                         printk(KERN_ERR "%s: PHY down? (BMCR %x)\n", dev->name,
2554                                bmcr);
2555                 } else if ((lp->saved_lpa ^ lpa) &
2556                            (LPA_100FULL|LPA_100HALF|LPA_10FULL|LPA_10HALF)) {
2557                         printk(KERN_NOTICE "%s: link status changed"
2558                                " (BMCR %x LPA %x->%x)\n", dev->name,
2559                                bmcr, lp->saved_lpa, lpa);
2560                 } else {
2561                         /* go on */
2562                         restart_timer = 1;
2563                         break;
2564                 }
2565                 /* Try to restart the adaptor. */
2566                 tc35815_restart(dev);
2567                 goto out;
2568
2569         case asleep:
2570         default:
2571                 /* Can't happens.... */
2572                 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got "
2573                        "one anyways!\n", dev->name);
2574                 restart_timer = 0;
2575                 lp->timer_ticks = 0;
2576                 lp->timer_state = asleep; /* foo on you */
2577                 break;
2578         }
2579
2580         if (restart_timer) {
2581                 lp->timer.expires = jiffies + msecs_to_jiffies(1200);
2582                 add_timer(&lp->timer);
2583         }
2584 out:
2585         spin_unlock_irq(&lp->lock);
2586 }
2587
2588 static void tc35815_start_auto_negotiation(struct net_device *dev,
2589                                            struct ethtool_cmd *ep)
2590 {
2591         struct tc35815_local *lp = dev->priv;
2592         int pid = lp->phy_addr;
2593         unsigned short bmsr, bmcr, advertize;
2594         int timeout;
2595
2596         netif_carrier_off(dev);
2597         bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2598         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2599         advertize = tc_mdio_read(dev, pid, MII_ADVERTISE);
2600
2601         if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
2602                 if (options.speed || options.duplex) {
2603                         /* Advertise only specified configuration. */
2604                         advertize &= ~(ADVERTISE_10HALF |
2605                                        ADVERTISE_10FULL |
2606                                        ADVERTISE_100HALF |
2607                                        ADVERTISE_100FULL);
2608                         if (options.speed != 10) {
2609                                 if (options.duplex != 1)
2610                                         advertize |= ADVERTISE_100FULL;
2611                                 if (options.duplex != 2)
2612                                         advertize |= ADVERTISE_100HALF;
2613                         }
2614                         if (options.speed != 100) {
2615                                 if (options.duplex != 1)
2616                                         advertize |= ADVERTISE_10FULL;
2617                                 if (options.duplex != 2)
2618                                         advertize |= ADVERTISE_10HALF;
2619                         }
2620                         if (options.speed == 100)
2621                                 bmcr |= BMCR_SPEED100;
2622                         else if (options.speed == 10)
2623                                 bmcr &= ~BMCR_SPEED100;
2624                         if (options.duplex == 2)
2625                                 bmcr |= BMCR_FULLDPLX;
2626                         else if (options.duplex == 1)
2627                                 bmcr &= ~BMCR_FULLDPLX;
2628                 } else {
2629                         /* Advertise everything we can support. */
2630                         if (bmsr & BMSR_10HALF)
2631                                 advertize |= ADVERTISE_10HALF;
2632                         else
2633                                 advertize &= ~ADVERTISE_10HALF;
2634                         if (bmsr & BMSR_10FULL)
2635                                 advertize |= ADVERTISE_10FULL;
2636                         else
2637                                 advertize &= ~ADVERTISE_10FULL;
2638                         if (bmsr & BMSR_100HALF)
2639                                 advertize |= ADVERTISE_100HALF;
2640                         else
2641                                 advertize &= ~ADVERTISE_100HALF;
2642                         if (bmsr & BMSR_100FULL)
2643                                 advertize |= ADVERTISE_100FULL;
2644                         else
2645                                 advertize &= ~ADVERTISE_100FULL;
2646                 }
2647
2648                 tc_mdio_write(dev, pid, MII_ADVERTISE, advertize);
2649
2650                 /* Enable Auto-Negotiation, this is usually on already... */
2651                 bmcr |= BMCR_ANENABLE;
2652                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2653
2654                 /* Restart it to make sure it is going. */
2655                 bmcr |= BMCR_ANRESTART;
2656                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2657                 printk(KERN_DEBUG "%s: ADVERTISE %x BMCR %x\n", dev->name, advertize, bmcr);
2658
2659                 /* BMCR_ANRESTART self clears when the process has begun. */
2660                 timeout = 64;  /* More than enough. */
2661                 while (--timeout) {
2662                         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2663                         if (!(bmcr & BMCR_ANRESTART))
2664                                 break; /* got it. */
2665                         udelay(10);
2666                 }
2667                 if (!timeout) {
2668                         printk(KERN_ERR "%s: TC35815 would not start auto "
2669                                "negotiation BMCR=0x%04x\n",
2670                                dev->name, bmcr);
2671                         printk(KERN_NOTICE "%s: Performing force link "
2672                                "detection.\n", dev->name);
2673                         goto force_link;
2674                 } else {
2675                         printk(KERN_DEBUG "%s: auto negotiation started.\n", dev->name);
2676                         lp->timer_state = arbwait;
2677                 }
2678         } else {
2679 force_link:
2680                 /* Force the link up, trying first a particular mode.
2681                  * Either we are here at the request of ethtool or
2682                  * because the Happy Meal would not start to autoneg.
2683                  */
2684
2685                 /* Disable auto-negotiation in BMCR, enable the duplex and
2686                  * speed setting, init the timer state machine, and fire it off.
2687                  */
2688                 if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
2689                         bmcr = BMCR_SPEED100;
2690                 } else {
2691                         if (ep->speed == SPEED_100)
2692                                 bmcr = BMCR_SPEED100;
2693                         else
2694                                 bmcr = 0;
2695                         if (ep->duplex == DUPLEX_FULL)
2696                                 bmcr |= BMCR_FULLDPLX;
2697                 }
2698                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2699
2700                 /* OK, seems we need do disable the transceiver for the first
2701                  * tick to make sure we get an accurate link state at the
2702                  * second tick.
2703                  */
2704                 lp->timer_state = ltrywait;
2705         }
2706
2707         del_timer(&lp->timer);
2708         lp->timer_ticks = 0;
2709         lp->timer.expires = jiffies + msecs_to_jiffies(1200);
2710         add_timer(&lp->timer);
2711 }
2712
2713 static void tc35815_find_phy(struct net_device *dev)
2714 {
2715         struct tc35815_local *lp = dev->priv;
2716         int pid = lp->phy_addr;
2717         unsigned short id0;
2718
2719         /* find MII phy */
2720         for (pid = 31; pid >= 0; pid--) {
2721                 id0 = tc_mdio_read(dev, pid, MII_BMSR);
2722                 if (id0 != 0xffff && id0 != 0x0000 &&
2723                     (id0 & BMSR_RESV) != (0xffff & BMSR_RESV) /* paranoia? */
2724                         ) {
2725                         lp->phy_addr = pid;
2726                         break;
2727                 }
2728         }
2729         if (pid < 0) {
2730                 printk(KERN_ERR "%s: No MII Phy found.\n",
2731                        dev->name);
2732                 lp->phy_addr = pid = 0;
2733         }
2734
2735         lp->mii_id[0] = tc_mdio_read(dev, pid, MII_PHYSID1);
2736         lp->mii_id[1] = tc_mdio_read(dev, pid, MII_PHYSID2);
2737         if (netif_msg_hw(lp))
2738                 printk(KERN_INFO "%s: PHY(%02x) ID %04x %04x\n", dev->name,
2739                        pid, lp->mii_id[0], lp->mii_id[1]);
2740 }
2741
2742 static void tc35815_phy_chip_init(struct net_device *dev)
2743 {
2744         struct tc35815_local *lp = dev->priv;
2745         int pid = lp->phy_addr;
2746         unsigned short bmcr;
2747         struct ethtool_cmd ecmd, *ep;
2748
2749         /* dis-isolate if needed. */
2750         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2751         if (bmcr & BMCR_ISOLATE) {
2752                 int count = 32;
2753                 printk(KERN_DEBUG "%s: unisolating...", dev->name);
2754                 tc_mdio_write(dev, pid, MII_BMCR, bmcr & ~BMCR_ISOLATE);
2755                 while (--count) {
2756                         if (!(tc_mdio_read(dev, pid, MII_BMCR) & BMCR_ISOLATE))
2757                                 break;
2758                         udelay(20);
2759                 }
2760                 printk(" %s.\n", count ? "done" : "failed");
2761         }
2762
2763         if (options.speed && options.duplex) {
2764                 ecmd.autoneg = AUTONEG_DISABLE;
2765                 ecmd.speed = options.speed == 10 ? SPEED_10 : SPEED_100;
2766                 ecmd.duplex = options.duplex == 1 ? DUPLEX_HALF : DUPLEX_FULL;
2767                 ep = &ecmd;
2768         } else {
2769                 ep = NULL;
2770         }
2771         tc35815_start_auto_negotiation(dev, ep);
2772 }
2773
2774 static void tc35815_chip_reset(struct net_device *dev)
2775 {
2776         struct tc35815_regs __iomem *tr =
2777                 (struct tc35815_regs __iomem *)dev->base_addr;
2778         int i;
2779         /* reset the controller */
2780         tc_writel(MAC_Reset, &tr->MAC_Ctl);
2781         udelay(4); /* 3200ns */
2782         i = 0;
2783         while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
2784                 if (i++ > 100) {
2785                         printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
2786                         break;
2787                 }
2788                 mdelay(1);
2789         }
2790         tc_writel(0, &tr->MAC_Ctl);
2791
2792         /* initialize registers to default value */
2793         tc_writel(0, &tr->DMA_Ctl);
2794         tc_writel(0, &tr->TxThrsh);
2795         tc_writel(0, &tr->TxPollCtr);
2796         tc_writel(0, &tr->RxFragSize);
2797         tc_writel(0, &tr->Int_En);
2798         tc_writel(0, &tr->FDA_Bas);
2799         tc_writel(0, &tr->FDA_Lim);
2800         tc_writel(0xffffffff, &tr->Int_Src);    /* Write 1 to clear */
2801         tc_writel(0, &tr->CAM_Ctl);
2802         tc_writel(0, &tr->Tx_Ctl);
2803         tc_writel(0, &tr->Rx_Ctl);
2804         tc_writel(0, &tr->CAM_Ena);
2805         (void)tc_readl(&tr->Miss_Cnt);  /* Read to clear */
2806
2807         /* initialize internal SRAM */
2808         tc_writel(DMA_TestMode, &tr->DMA_Ctl);
2809         for (i = 0; i < 0x1000; i += 4) {
2810                 tc_writel(i, &tr->CAM_Adr);
2811                 tc_writel(0, &tr->CAM_Data);
2812         }
2813         tc_writel(0, &tr->DMA_Ctl);
2814 }
2815
2816 static void tc35815_chip_init(struct net_device *dev)
2817 {
2818         struct tc35815_local *lp = dev->priv;
2819         struct tc35815_regs __iomem *tr =
2820                 (struct tc35815_regs __iomem *)dev->base_addr;
2821         unsigned long txctl = TX_CTL_CMD;
2822
2823         tc35815_phy_chip_init(dev);
2824
2825         /* load station address to CAM */
2826         tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
2827
2828         /* Enable CAM (broadcast and unicast) */
2829         tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2830         tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2831
2832         /* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
2833         if (HAVE_DMA_RXALIGN(lp))
2834                 tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
2835         else
2836                 tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
2837 #ifdef TC35815_USE_PACKEDBUFFER
2838         tc_writel(RxFrag_EnPack | ETH_ZLEN, &tr->RxFragSize);   /* Packing */
2839 #else
2840         tc_writel(ETH_ZLEN, &tr->RxFragSize);
2841 #endif
2842         tc_writel(0, &tr->TxPollCtr);   /* Batch mode */
2843         tc_writel(TX_THRESHOLD, &tr->TxThrsh);
2844         tc_writel(INT_EN_CMD, &tr->Int_En);
2845
2846         /* set queues */
2847         tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
2848         tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
2849                   &tr->FDA_Lim);
2850         /*
2851          * Activation method:
2852          * First, enable the MAC Transmitter and the DMA Receive circuits.
2853          * Then enable the DMA Transmitter and the MAC Receive circuits.
2854          */
2855         tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr);      /* start DMA receiver */
2856         tc_writel(RX_CTL_CMD, &tr->Rx_Ctl);     /* start MAC receiver */
2857
2858         /* start MAC transmitter */
2859 #ifndef NO_CHECK_CARRIER
2860         /* TX4939 does not have EnLCarr */
2861         if (lp->boardtype == TC35815_TX4939)
2862                 txctl &= ~Tx_EnLCarr;
2863 #ifdef WORKAROUND_LOSTCAR
2864         /* WORKAROUND: ignore LostCrS in full duplex operation */
2865         if ((lp->timer_state != asleep && lp->timer_state != lcheck) ||
2866             lp->fullduplex)
2867                 txctl &= ~Tx_EnLCarr;
2868 #endif
2869 #endif /* !NO_CHECK_CARRIER */
2870 #ifdef GATHER_TXINT
2871         txctl &= ~Tx_EnComp;    /* disable global tx completion int. */
2872 #endif
2873         tc_writel(txctl, &tr->Tx_Ctl);
2874 }
2875
2876 #ifdef CONFIG_PM
2877 static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
2878 {
2879         struct net_device *dev = pci_get_drvdata(pdev);
2880         struct tc35815_local *lp = dev->priv;
2881         unsigned long flags;
2882
2883         pci_save_state(pdev);
2884         if (!netif_running(dev))
2885                 return 0;
2886         netif_device_detach(dev);
2887         spin_lock_irqsave(&lp->lock, flags);
2888         del_timer(&lp->timer);          /* Kill if running      */
2889         tc35815_chip_reset(dev);
2890         spin_unlock_irqrestore(&lp->lock, flags);
2891         pci_set_power_state(pdev, PCI_D3hot);
2892         return 0;
2893 }
2894
2895 static int tc35815_resume(struct pci_dev *pdev)
2896 {
2897         struct net_device *dev = pci_get_drvdata(pdev);
2898         struct tc35815_local *lp = dev->priv;
2899         unsigned long flags;
2900
2901         pci_restore_state(pdev);
2902         if (!netif_running(dev))
2903                 return 0;
2904         pci_set_power_state(pdev, PCI_D0);
2905         spin_lock_irqsave(&lp->lock, flags);
2906         tc35815_restart(dev);
2907         spin_unlock_irqrestore(&lp->lock, flags);
2908         netif_device_attach(dev);
2909         return 0;
2910 }
2911 #endif /* CONFIG_PM */
2912
2913 static struct pci_driver tc35815_pci_driver = {
2914         .name           = MODNAME,
2915         .id_table       = tc35815_pci_tbl,
2916         .probe          = tc35815_init_one,
2917         .remove         = __devexit_p(tc35815_remove_one),
2918 #ifdef CONFIG_PM
2919         .suspend        = tc35815_suspend,
2920         .resume         = tc35815_resume,
2921 #endif
2922 };
2923
2924 module_param_named(speed, options.speed, int, 0);
2925 MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
2926 module_param_named(duplex, options.duplex, int, 0);
2927 MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
2928 module_param_named(doforce, options.doforce, int, 0);
2929 MODULE_PARM_DESC(doforce, "try force link mode if auto-negotiation failed");
2930
2931 static int __init tc35815_init_module(void)
2932 {
2933         return pci_register_driver(&tc35815_pci_driver);
2934 }
2935
2936 static void __exit tc35815_cleanup_module(void)
2937 {
2938         pci_unregister_driver(&tc35815_pci_driver);
2939 }
2940
2941 module_init(tc35815_init_module);
2942 module_exit(tc35815_cleanup_module);
2943
2944 MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
2945 MODULE_LICENSE("GPL");