drivers/net/tc35815.c

   1 /*
   2  * tc35815.c: A TOSHIBA TC35815CF PCI 10/100Mbps ethernet driver for linux.
   3  *
   4  * Based on skelton.c by Donald Becker.
   5  *
   6  * This driver is a replacement of older and less maintained version.
   7  * This is a header of the older version:
   8  *      -----<snip>-----
   9  *      Copyright 2001 MontaVista Software Inc.
  10  *      Author: MontaVista Software, Inc.
  11  *              ahennessy@mvista.com
  12  *      Copyright (C) 2000-2001 Toshiba Corporation
  13  *      static const char *version =
  14  *              "tc35815.c:v0.00 26/07/2000 by Toshiba Corporation\n";
  15  *      -----<snip>-----
  16  *
  17  * This file is subject to the terms and conditions of the GNU General Public
  18  * License.  See the file "COPYING" in the main directory of this archive
  19  * for more details.
  20  *
  21  * (C) Copyright TOSHIBA CORPORATION 2004-2005
  22  * All Rights Reserved.
  23  */
  24
  25 #ifdef TC35815_NAPI
  26 #define DRV_VERSION     "1.36-NAPI"
  27 #else
  28 #define DRV_VERSION     "1.36"
  29 #endif
  30 static const char *version = "tc35815.c:v" DRV_VERSION "\n";
  31 #define MODNAME                 "tc35815"
  32
  33 #include <linux/module.h>
  34 #include <linux/kernel.h>
  35 #include <linux/types.h>
  36 #include <linux/fcntl.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/ioport.h>
  39 #include <linux/in.h>
  40 #include <linux/slab.h>
  41 #include <linux/string.h>
  42 #include <linux/spinlock.h>
  43 #include <linux/errno.h>
  44 #include <linux/init.h>
  45 #include <linux/netdevice.h>
  46 #include <linux/etherdevice.h>
  47 #include <linux/skbuff.h>
  48 #include <linux/delay.h>
  49 #include <linux/pci.h>
  50 #include <linux/mii.h>
  51 #include <linux/ethtool.h>
  52 #include <linux/platform_device.h>
  53 #include <asm/io.h>
  54 #include <asm/byteorder.h>
  55
  56 /* First, a few definitions that the brave might change. */
  57
  58 #define GATHER_TXINT    /* On-Demand Tx Interrupt */
  59 #define WORKAROUND_LOSTCAR
  60 #define WORKAROUND_100HALF_PROMISC
  61 /* #define TC35815_USE_PACKEDBUFFER */
  62
  63 typedef enum {
  64         TC35815CF = 0,
  65         TC35815_NWU,
  66         TC35815_TX4939,
  67 } board_t;
  68
  69 /* indexed by board_t, above */
  70 static const struct {
  71         const char *name;
  72 } board_info[] __devinitdata = {
  73         { "TOSHIBA TC35815CF 10/100BaseTX" },
  74         { "TOSHIBA TC35815 with Wake on LAN" },
  75         { "TOSHIBA TC35815/TX4939" },
  76 };
  77
  78 static const struct pci_device_id tc35815_pci_tbl[] = {
  79         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815CF), .driver_data = TC35815CF },
  80         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_NWU), .driver_data = TC35815_NWU },
  81         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939), .driver_data = TC35815_TX4939 },
  82         {0,}
  83 };
  84 MODULE_DEVICE_TABLE (pci, tc35815_pci_tbl);
  85
  86 /* see MODULE_PARM_DESC */
  87 static struct tc35815_options {
  88         int speed;
  89         int duplex;
  90         int doforce;
  91 } options;
  92
  93 /*
  94  * Registers
  95  */
  96 struct tc35815_regs {
  97         __u32 DMA_Ctl;          /* 0x00 */
  98         __u32 TxFrmPtr;
  99         __u32 TxThrsh;
 100         __u32 TxPollCtr;
 101         __u32 BLFrmPtr;
 102         __u32 RxFragSize;
 103         __u32 Int_En;
 104         __u32 FDA_Bas;
 105         __u32 FDA_Lim;          /* 0x20 */
 106         __u32 Int_Src;
 107         __u32 unused0[2];
 108         __u32 PauseCnt;
 109         __u32 RemPauCnt;
 110         __u32 TxCtlFrmStat;
 111         __u32 unused1;
 112         __u32 MAC_Ctl;          /* 0x40 */
 113         __u32 CAM_Ctl;
 114         __u32 Tx_Ctl;
 115         __u32 Tx_Stat;
 116         __u32 Rx_Ctl;
 117         __u32 Rx_Stat;
 118         __u32 MD_Data;
 119         __u32 MD_CA;
 120         __u32 CAM_Adr;          /* 0x60 */
 121         __u32 CAM_Data;
 122         __u32 CAM_Ena;
 123         __u32 PROM_Ctl;
 124         __u32 PROM_Data;
 125         __u32 Algn_Cnt;
 126         __u32 CRC_Cnt;
 127         __u32 Miss_Cnt;
 128 };
 129
 130 /*
 131  * Bit assignments
 132  */
 133 /* DMA_Ctl bit asign ------------------------------------------------------- */
 134 #define DMA_RxAlign            0x00c00000 /* 1:Reception Alignment           */
 135 #define DMA_RxAlign_1          0x00400000
 136 #define DMA_RxAlign_2          0x00800000
 137 #define DMA_RxAlign_3          0x00c00000
 138 #define DMA_M66EnStat          0x00080000 /* 1:66MHz Enable State            */
 139 #define DMA_IntMask            0x00040000 /* 1:Interupt mask                 */
 140 #define DMA_SWIntReq           0x00020000 /* 1:Software Interrupt request    */
 141 #define DMA_TxWakeUp           0x00010000 /* 1:Transmit Wake Up              */
 142 #define DMA_RxBigE             0x00008000 /* 1:Receive Big Endian            */
 143 #define DMA_TxBigE             0x00004000 /* 1:Transmit Big Endian           */
 144 #define DMA_TestMode           0x00002000 /* 1:Test Mode                     */
 145 #define DMA_PowrMgmnt          0x00001000 /* 1:Power Management              */
 146 #define DMA_DmBurst_Mask       0x000001fc /* DMA Burst size                  */
 147
 148 /* RxFragSize bit asign ---------------------------------------------------- */
 149 #define RxFrag_EnPack          0x00008000 /* 1:Enable Packing                */
 150 #define RxFrag_MinFragMask     0x00000ffc /* Minimum Fragment                */
 151
 152 /* MAC_Ctl bit asign ------------------------------------------------------- */
 153 #define MAC_Link10             0x00008000 /* 1:Link Status 10Mbits           */
 154 #define MAC_EnMissRoll         0x00002000 /* 1:Enable Missed Roll            */
 155 #define MAC_MissRoll           0x00000400 /* 1:Missed Roll                   */
 156 #define MAC_Loop10             0x00000080 /* 1:Loop 10 Mbps                  */
 157 #define MAC_Conn_Auto          0x00000000 /*00:Connection mode (Automatic)   */
 158 #define MAC_Conn_10M           0x00000020 /*01:                (10Mbps endec)*/
 159 #define MAC_Conn_Mll           0x00000040 /*10:                (Mll clock)   */
 160 #define MAC_MacLoop            0x00000010 /* 1:MAC Loopback                  */
 161 #define MAC_FullDup            0x00000008 /* 1:Full Duplex 0:Half Duplex     */
 162 #define MAC_Reset              0x00000004 /* 1:Software Reset                */
 163 #define MAC_HaltImm            0x00000002 /* 1:Halt Immediate                */
 164 #define MAC_HaltReq            0x00000001 /* 1:Halt request                  */
 165
 166 /* PROM_Ctl bit asign ------------------------------------------------------ */
 167 #define PROM_Busy              0x00008000 /* 1:Busy (Start Operation)        */
 168 #define PROM_Read              0x00004000 /*10:Read operation                */
 169 #define PROM_Write             0x00002000 /*01:Write operation               */
 170 #define PROM_Erase             0x00006000 /*11:Erase operation               */
 171                                           /*00:Enable or Disable Writting,   */
 172                                           /*      as specified in PROM_Addr. */
 173 #define PROM_Addr_Ena          0x00000030 /*11xxxx:PROM Write enable         */
 174                                           /*00xxxx:           disable        */
 175
 176 /* CAM_Ctl bit asign ------------------------------------------------------- */
 177 #define CAM_CompEn             0x00000010 /* 1:CAM Compare Enable            */
 178 #define CAM_NegCAM             0x00000008 /* 1:Reject packets CAM recognizes,*/
 179                                           /*                    accept other */
 180 #define CAM_BroadAcc           0x00000004 /* 1:Broadcast assept              */
 181 #define CAM_GroupAcc           0x00000002 /* 1:Multicast assept              */
 182 #define CAM_StationAcc         0x00000001 /* 1:unicast accept                */
 183
 184 /* CAM_Ena bit asign ------------------------------------------------------- */
 185 #define CAM_ENTRY_MAX                  21   /* CAM Data entry max count      */
 186 #define CAM_Ena_Mask ((1<<CAM_ENTRY_MAX)-1) /* CAM Enable bits (Max 21bits)  */
 187 #define CAM_Ena_Bit(index)         (1<<(index))
 188 #define CAM_ENTRY_DESTINATION   0
 189 #define CAM_ENTRY_SOURCE        1
 190 #define CAM_ENTRY_MACCTL        20
 191
 192 /* Tx_Ctl bit asign -------------------------------------------------------- */
 193 #define Tx_En                  0x00000001 /* 1:Transmit enable               */
 194 #define Tx_TxHalt              0x00000002 /* 1:Transmit Halt Request         */
 195 #define Tx_NoPad               0x00000004 /* 1:Suppress Padding              */
 196 #define Tx_NoCRC               0x00000008 /* 1:Suppress Padding              */
 197 #define Tx_FBack               0x00000010 /* 1:Fast Back-off                 */
 198 #define Tx_EnUnder             0x00000100 /* 1:Enable Underrun               */
 199 #define Tx_EnExDefer           0x00000200 /* 1:Enable Excessive Deferral     */
 200 #define Tx_EnLCarr             0x00000400 /* 1:Enable Lost Carrier           */
 201 #define Tx_EnExColl            0x00000800 /* 1:Enable Excessive Collision    */
 202 #define Tx_EnLateColl          0x00001000 /* 1:Enable Late Collision         */
 203 #define Tx_EnTxPar             0x00002000 /* 1:Enable Transmit Parity        */
 204 #define Tx_EnComp              0x00004000 /* 1:Enable Completion             */
 205
 206 /* Tx_Stat bit asign ------------------------------------------------------- */
 207 #define Tx_TxColl_MASK         0x0000000F /* Tx Collision Count              */
 208 #define Tx_ExColl              0x00000010 /* Excessive Collision             */
 209 #define Tx_TXDefer             0x00000020 /* Transmit Defered                */
 210 #define Tx_Paused              0x00000040 /* Transmit Paused                 */
 211 #define Tx_IntTx               0x00000080 /* Interrupt on Tx                 */
 212 #define Tx_Under               0x00000100 /* Underrun                        */
 213 #define Tx_Defer               0x00000200 /* Deferral                        */
 214 #define Tx_NCarr               0x00000400 /* No Carrier                      */
 215 #define Tx_10Stat              0x00000800 /* 10Mbps Status                   */
 216 #define Tx_LateColl            0x00001000 /* Late Collision                  */
 217 #define Tx_TxPar               0x00002000 /* Tx Parity Error                 */
 218 #define Tx_Comp                0x00004000 /* Completion                      */
 219 #define Tx_Halted              0x00008000 /* Tx Halted                       */
 220 #define Tx_SQErr               0x00010000 /* Signal Quality Error(SQE)       */
 221
 222 /* Rx_Ctl bit asign -------------------------------------------------------- */
 223 #define Rx_EnGood              0x00004000 /* 1:Enable Good                   */
 224 #define Rx_EnRxPar             0x00002000 /* 1:Enable Receive Parity         */
 225 #define Rx_EnLongErr           0x00000800 /* 1:Enable Long Error             */
 226 #define Rx_EnOver              0x00000400 /* 1:Enable OverFlow               */
 227 #define Rx_EnCRCErr            0x00000200 /* 1:Enable CRC Error              */
 228 #define Rx_EnAlign             0x00000100 /* 1:Enable Alignment              */
 229 #define Rx_IgnoreCRC           0x00000040 /* 1:Ignore CRC Value              */
 230 #define Rx_StripCRC            0x00000010 /* 1:Strip CRC Value               */
 231 #define Rx_ShortEn             0x00000008 /* 1:Short Enable                  */
 232 #define Rx_LongEn              0x00000004 /* 1:Long Enable                   */
 233 #define Rx_RxHalt              0x00000002 /* 1:Receive Halt Request          */
 234 #define Rx_RxEn                0x00000001 /* 1:Receive Intrrupt Enable       */
 235
 236 /* Rx_Stat bit asign ------------------------------------------------------- */
 237 #define Rx_Halted              0x00008000 /* Rx Halted                       */
 238 #define Rx_Good                0x00004000 /* Rx Good                         */
 239 #define Rx_RxPar               0x00002000 /* Rx Parity Error                 */
 240                             /* 0x00001000    not use                         */
 241 #define Rx_LongErr             0x00000800 /* Rx Long Error                   */
 242 #define Rx_Over                0x00000400 /* Rx Overflow                     */
 243 #define Rx_CRCErr              0x00000200 /* Rx CRC Error                    */
 244 #define Rx_Align               0x00000100 /* Rx Alignment Error              */
 245 #define Rx_10Stat              0x00000080 /* Rx 10Mbps Status                */
 246 #define Rx_IntRx               0x00000040 /* Rx Interrupt                    */
 247 #define Rx_CtlRecd             0x00000020 /* Rx Control Receive              */
 248
 249 #define Rx_Stat_Mask           0x0000EFC0 /* Rx All Status Mask              */
 250
 251 /* Int_En bit asign -------------------------------------------------------- */
 252 #define Int_NRAbtEn            0x00000800 /* 1:Non-recoverable Abort Enable  */
 253 #define Int_TxCtlCmpEn         0x00000400 /* 1:Transmit Control Complete Enable */
 254 #define Int_DmParErrEn         0x00000200 /* 1:DMA Parity Error Enable       */
 255 #define Int_DParDEn            0x00000100 /* 1:Data Parity Error Enable      */
 256 #define Int_EarNotEn           0x00000080 /* 1:Early Notify Enable           */
 257 #define Int_DParErrEn          0x00000040 /* 1:Detected Parity Error Enable  */
 258 #define Int_SSysErrEn          0x00000020 /* 1:Signalled System Error Enable */
 259 #define Int_RMasAbtEn          0x00000010 /* 1:Received Master Abort Enable  */
 260 #define Int_RTargAbtEn         0x00000008 /* 1:Received Target Abort Enable  */
 261 #define Int_STargAbtEn         0x00000004 /* 1:Signalled Target Abort Enable */
 262 #define Int_BLExEn             0x00000002 /* 1:Buffer List Exhausted Enable  */
 263 #define Int_FDAExEn            0x00000001 /* 1:Free Descriptor Area          */
 264                                           /*               Exhausted Enable  */
 265
 266 /* Int_Src bit asign ------------------------------------------------------- */
 267 #define Int_NRabt              0x00004000 /* 1:Non Recoverable error         */
 268 #define Int_DmParErrStat       0x00002000 /* 1:DMA Parity Error & Clear      */
 269 #define Int_BLEx               0x00001000 /* 1:Buffer List Empty & Clear     */
 270 #define Int_FDAEx              0x00000800 /* 1:FDA Empty & Clear             */
 271 #define Int_IntNRAbt           0x00000400 /* 1:Non Recoverable Abort         */
 272 #define Int_IntCmp             0x00000200 /* 1:MAC control packet complete   */
 273 #define Int_IntExBD            0x00000100 /* 1:Interrupt Extra BD & Clear    */
 274 #define Int_DmParErr           0x00000080 /* 1:DMA Parity Error & Clear      */
 275 #define Int_IntEarNot          0x00000040 /* 1:Receive Data write & Clear    */
 276 #define Int_SWInt              0x00000020 /* 1:Software request & Clear      */
 277 #define Int_IntBLEx            0x00000010 /* 1:Buffer List Empty & Clear     */
 278 #define Int_IntFDAEx           0x00000008 /* 1:FDA Empty & Clear             */
 279 #define Int_IntPCI             0x00000004 /* 1:PCI controller & Clear        */
 280 #define Int_IntMacRx           0x00000002 /* 1:Rx controller & Clear         */
 281 #define Int_IntMacTx           0x00000001 /* 1:Tx controller & Clear         */
 282
 283 /* MD_CA bit asign --------------------------------------------------------- */
 284 #define MD_CA_PreSup           0x00001000 /* 1:Preamble Supress              */
 285 #define MD_CA_Busy             0x00000800 /* 1:Busy (Start Operation)        */
 286 #define MD_CA_Wr               0x00000400 /* 1:Write 0:Read                  */
 287
 288
 289 /*
 290  * Descriptors
 291  */
 292
 293 /* Frame descripter */
 294 struct FDesc {
 295         volatile __u32 FDNext;
 296         volatile __u32 FDSystem;
 297         volatile __u32 FDStat;
 298         volatile __u32 FDCtl;
 299 };
 300
 301 /* Buffer descripter */
 302 struct BDesc {
 303         volatile __u32 BuffData;
 304         volatile __u32 BDCtl;
 305 };
 306
 307 #define FD_ALIGN        16
 308
 309 /* Frame Descripter bit asign ---------------------------------------------- */
 310 #define FD_FDLength_MASK       0x0000FFFF /* Length MASK                     */
 311 #define FD_BDCnt_MASK          0x001F0000 /* BD count MASK in FD             */
 312 #define FD_FrmOpt_MASK         0x7C000000 /* Frame option MASK               */
 313 #define FD_FrmOpt_BigEndian    0x40000000 /* Tx/Rx */
 314 #define FD_FrmOpt_IntTx        0x20000000 /* Tx only */
 315 #define FD_FrmOpt_NoCRC        0x10000000 /* Tx only */
 316 #define FD_FrmOpt_NoPadding    0x08000000 /* Tx only */
 317 #define FD_FrmOpt_Packing      0x04000000 /* Rx only */
 318 #define FD_CownsFD             0x80000000 /* FD Controller owner bit         */
 319 #define FD_Next_EOL            0x00000001 /* FD EOL indicator                */
 320 #define FD_BDCnt_SHIFT         16
 321
 322 /* Buffer Descripter bit asign --------------------------------------------- */
 323 #define BD_BuffLength_MASK     0x0000FFFF /* Recieve Data Size               */
 324 #define BD_RxBDID_MASK         0x00FF0000 /* BD ID Number MASK               */
 325 #define BD_RxBDSeqN_MASK       0x7F000000 /* Rx BD Sequence Number           */
 326 #define BD_CownsBD             0x80000000 /* BD Controller owner bit         */
 327 #define BD_RxBDID_SHIFT        16
 328 #define BD_RxBDSeqN_SHIFT      24
 329
 330
 331 /* Some useful constants. */
 332 #undef NO_CHECK_CARRIER /* Does not check No-Carrier with TP */
 333
 334 #ifdef NO_CHECK_CARRIER
 335 #define TX_CTL_CMD      (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
 336         Tx_EnExColl | Tx_EnExDefer | Tx_EnUnder | \
 337         Tx_En)  /* maybe  0x7b01 */
 338 #else
 339 #define TX_CTL_CMD      (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
 340         Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
 341         Tx_En)  /* maybe  0x7b01 */
 342 #endif
 343 #define RX_CTL_CMD      (Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
 344         | Rx_EnCRCErr | Rx_EnAlign | Rx_RxEn)   /* maybe 0x6f01 */
 345 #define INT_EN_CMD  (Int_NRAbtEn | \
 346         Int_DmParErrEn | Int_DParDEn | Int_DParErrEn | \
 347         Int_SSysErrEn  | Int_RMasAbtEn | Int_RTargAbtEn | \
 348         Int_STargAbtEn | \
 349         Int_BLExEn  | Int_FDAExEn) /* maybe 0xb7f*/
 350 #define DMA_CTL_CMD     DMA_BURST_SIZE
 351 #define HAVE_DMA_RXALIGN(lp)    likely((lp)->boardtype != TC35815CF)
 352
 353 /* Tuning parameters */
 354 #define DMA_BURST_SIZE  32
 355 #define TX_THRESHOLD    1024
 356 #define TX_THRESHOLD_MAX 1536       /* used threshold with packet max byte for low pci transfer ability.*/
 357 #define TX_THRESHOLD_KEEP_LIMIT 10  /* setting threshold max value when overrun error occured this count. */
 358
 359 /* 16 + RX_BUF_NUM * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*FD_PAGE_NUM */
 360 #ifdef TC35815_USE_PACKEDBUFFER
 361 #define FD_PAGE_NUM 2
 362 #define RX_BUF_NUM      8       /* >= 2 */
 363 #define RX_FD_NUM       250     /* >= 32 */
 364 #define TX_FD_NUM       128
 365 #define RX_BUF_SIZE     PAGE_SIZE
 366 #else /* TC35815_USE_PACKEDBUFFER */
 367 #define FD_PAGE_NUM 4
 368 #define RX_BUF_NUM      128     /* < 256 */
 369 #define RX_FD_NUM       256     /* >= 32 */
 370 #define TX_FD_NUM       128
 371 #if RX_CTL_CMD & Rx_LongEn
 372 #define RX_BUF_SIZE     PAGE_SIZE
 373 #elif RX_CTL_CMD & Rx_StripCRC
 374 #define RX_BUF_SIZE     ALIGN(ETH_FRAME_LEN + 4 + 2, 32) /* +2: reserve */
 375 #else
 376 #define RX_BUF_SIZE     ALIGN(ETH_FRAME_LEN + 2, 32) /* +2: reserve */
 377 #endif
 378 #endif /* TC35815_USE_PACKEDBUFFER */
 379 #define RX_FD_RESERVE   (2 / 2) /* max 2 BD per RxFD */
 380 #define NAPI_WEIGHT     16
 381
 382 struct TxFD {
 383         struct FDesc fd;
 384         struct BDesc bd;
 385         struct BDesc unused;
 386 };
 387
 388 struct RxFD {
 389         struct FDesc fd;
 390         struct BDesc bd[0];     /* variable length */
 391 };
 392
 393 struct FrFD {
 394         struct FDesc fd;
 395         struct BDesc bd[RX_BUF_NUM];
 396 };
 397
 398
 399 #define tc_readl(addr)  ioread32(addr)
 400 #define tc_writel(d, addr)      iowrite32(d, addr)
 401
 402 #define TC35815_TX_TIMEOUT  msecs_to_jiffies(400)
 403
 404 /* Timer state engine. */
 405 enum tc35815_timer_state {
 406         arbwait  = 0,   /* Waiting for auto negotiation to complete.          */
 407         lupwait  = 1,   /* Auto-neg complete, awaiting link-up status.        */
 408         ltrywait = 2,   /* Forcing try of all modes, from fastest to slowest. */
 409         asleep   = 3,   /* Time inactive.                                     */
 410         lcheck   = 4,   /* Check link status.                                 */
 411 };
 412
 413 /* Information that need to be kept for each board. */
 414 struct tc35815_local {
 415         struct pci_dev *pci_dev;
 416
 417         struct net_device *dev;
 418         struct napi_struct napi;
 419
 420         /* statistics */
 421         struct {
 422                 int max_tx_qlen;
 423                 int tx_ints;
 424                 int rx_ints;
 425                 int tx_underrun;
 426         } lstats;
 427
 428         /* Tx control lock.  This protects the transmit buffer ring
 429          * state along with the "tx full" state of the driver.  This
 430          * means all netif_queue flow control actions are protected
 431          * by this lock as well.
 432          */
 433         spinlock_t lock;
 434
 435         int phy_addr;
 436         int fullduplex;
 437         unsigned short saved_lpa;
 438         struct timer_list timer;
 439         enum tc35815_timer_state timer_state; /* State of auto-neg timer. */
 440         unsigned int timer_ticks;       /* Number of clicks at each state  */
 441
 442         /*
 443          * Transmitting: Batch Mode.
 444          *      1 BD in 1 TxFD.
 445          * Receiving: Packing Mode. (TC35815_USE_PACKEDBUFFER)
 446          *      1 circular FD for Free Buffer List.
 447          *      RX_BUF_NUM BD in Free Buffer FD.
 448          *      One Free Buffer BD has PAGE_SIZE data buffer.
 449          * Or Non-Packing Mode.
 450          *      1 circular FD for Free Buffer List.
 451          *      RX_BUF_NUM BD in Free Buffer FD.
 452          *      One Free Buffer BD has ETH_FRAME_LEN data buffer.
 453          */
 454         void * fd_buf;  /* for TxFD, RxFD, FrFD */
 455         dma_addr_t fd_buf_dma;
 456         struct TxFD *tfd_base;
 457         unsigned int tfd_start;
 458         unsigned int tfd_end;
 459         struct RxFD *rfd_base;
 460         struct RxFD *rfd_limit;
 461         struct RxFD *rfd_cur;
 462         struct FrFD *fbl_ptr;
 463 #ifdef TC35815_USE_PACKEDBUFFER
 464         unsigned char fbl_curid;
 465         void * data_buf[RX_BUF_NUM];            /* packing */
 466         dma_addr_t data_buf_dma[RX_BUF_NUM];
 467         struct {
 468                 struct sk_buff *skb;
 469                 dma_addr_t skb_dma;
 470         } tx_skbs[TX_FD_NUM];
 471 #else
 472         unsigned int fbl_count;
 473         struct {
 474                 struct sk_buff *skb;
 475                 dma_addr_t skb_dma;
 476         } tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
 477 #endif
 478         struct mii_if_info mii;
 479         unsigned short mii_id[2];
 480         u32 msg_enable;
 481         board_t boardtype;
 482 };
 483
 484 static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
 485 {
 486         return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
 487 }
 488 #ifdef DEBUG
 489 static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
 490 {
 491         return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
 492 }
 493 #endif
 494 #ifdef TC35815_USE_PACKEDBUFFER
 495 static inline void *rxbuf_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
 496 {
 497         int i;
 498         for (i = 0; i < RX_BUF_NUM; i++) {
 499                 if (bus >= lp->data_buf_dma[i] &&
 500                     bus < lp->data_buf_dma[i] + PAGE_SIZE)
 501                         return (void *)((u8 *)lp->data_buf[i] +
 502                                         (bus - lp->data_buf_dma[i]));
 503         }
 504         return NULL;
 505 }
 506
 507 #define TC35815_DMA_SYNC_ONDEMAND
 508 static void* alloc_rxbuf_page(struct pci_dev *hwdev, dma_addr_t *dma_handle)
 509 {
 510 #ifdef TC35815_DMA_SYNC_ONDEMAND
 511         void *buf;
 512         /* pci_map + pci_dma_sync will be more effective than
 513          * pci_alloc_consistent on some archs. */
 514         if ((buf = (void *)__get_free_page(GFP_ATOMIC)) == NULL)
 515                 return NULL;
 516         *dma_handle = pci_map_single(hwdev, buf, PAGE_SIZE,
 517                                      PCI_DMA_FROMDEVICE);
 518         if (pci_dma_mapping_error(*dma_handle)) {
 519                 free_page((unsigned long)buf);
 520                 return NULL;
 521         }
 522         return buf;
 523 #else
 524         return pci_alloc_consistent(hwdev, PAGE_SIZE, dma_handle);
 525 #endif
 526 }
 527
 528 static void free_rxbuf_page(struct pci_dev *hwdev, void *buf, dma_addr_t dma_handle)
 529 {
 530 #ifdef TC35815_DMA_SYNC_ONDEMAND
 531         pci_unmap_single(hwdev, dma_handle, PAGE_SIZE, PCI_DMA_FROMDEVICE);
 532         free_page((unsigned long)buf);
 533 #else
 534         pci_free_consistent(hwdev, PAGE_SIZE, buf, dma_handle);
 535 #endif
 536 }
 537 #else /* TC35815_USE_PACKEDBUFFER */
 538 static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
 539                                        struct pci_dev *hwdev,
 540                                        dma_addr_t *dma_handle)
 541 {
 542         struct sk_buff *skb;
 543         skb = dev_alloc_skb(RX_BUF_SIZE);
 544         if (!skb)
 545                 return NULL;
 546         *dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
 547                                      PCI_DMA_FROMDEVICE);
 548         if (pci_dma_mapping_error(*dma_handle)) {
 549                 dev_kfree_skb_any(skb);
 550                 return NULL;
 551         }
 552         skb_reserve(skb, 2);    /* make IP header 4byte aligned */
 553         return skb;
 554 }
 555
 556 static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
 557 {
 558         pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
 559                          PCI_DMA_FROMDEVICE);
 560         dev_kfree_skb_any(skb);
 561 }
 562 #endif /* TC35815_USE_PACKEDBUFFER */
 563
 564 /* Index to functions, as function prototypes. */
 565
 566 static int      tc35815_open(struct net_device *dev);
 567 static int      tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
 568 static irqreturn_t      tc35815_interrupt(int irq, void *dev_id);
 569 #ifdef TC35815_NAPI
 570 static int      tc35815_rx(struct net_device *dev, int limit);
 571 static int      tc35815_poll(struct napi_struct *napi, int budget);
 572 #else
 573 static void     tc35815_rx(struct net_device *dev);
 574 #endif
 575 static void     tc35815_txdone(struct net_device *dev);
 576 static int      tc35815_close(struct net_device *dev);
 577 static struct   net_device_stats *tc35815_get_stats(struct net_device *dev);
 578 static void     tc35815_set_multicast_list(struct net_device *dev);
 579 static void     tc35815_tx_timeout(struct net_device *dev);
 580 static int      tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 581 #ifdef CONFIG_NET_POLL_CONTROLLER
 582 static void     tc35815_poll_controller(struct net_device *dev);
 583 #endif
 584 static const struct ethtool_ops tc35815_ethtool_ops;
 585
 586 /* Example routines you must write ;->. */
 587 static void     tc35815_chip_reset(struct net_device *dev);
 588 static void     tc35815_chip_init(struct net_device *dev);
 589 static void     tc35815_find_phy(struct net_device *dev);
 590 static void     tc35815_phy_chip_init(struct net_device *dev);
 591
 592 #ifdef DEBUG
 593 static void     panic_queues(struct net_device *dev);
 594 #endif
 595
 596 static void tc35815_timer(unsigned long data);
 597 static void tc35815_start_auto_negotiation(struct net_device *dev,
 598                                            struct ethtool_cmd *ep);
 599 static int tc_mdio_read(struct net_device *dev, int phy_id, int location);
 600 static void tc_mdio_write(struct net_device *dev, int phy_id, int location,
 601                           int val);
 602
 603 #ifdef CONFIG_CPU_TX49XX
 604 /*
 605  * Find a platform_device providing a MAC address.  The platform code
 606  * should provide a "tc35815-mac" device with a MAC address in its
 607  * platform_data.
 608  */
 609 static int __devinit tc35815_mac_match(struct device *dev, void *data)
 610 {
 611         struct platform_device *plat_dev = to_platform_device(dev);
 612         struct pci_dev *pci_dev = data;
 613         unsigned int id = pci_dev->irq;
 614         return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
 615 }
 616
 617 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
 618 {
 619         struct tc35815_local *lp = netdev_priv(dev);
 620         struct device *pd = bus_find_device(&platform_bus_type, NULL,
 621                                             lp->pci_dev, tc35815_mac_match);
 622         if (pd) {
 623                 if (pd->platform_data)
 624                         memcpy(dev->dev_addr, pd->platform_data, ETH_ALEN);
 625                 put_device(pd);
 626                 return is_valid_ether_addr(dev->dev_addr) ? 0 : -ENODEV;
 627         }
 628         return -ENODEV;
 629 }
 630 #else
 631 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
 632 {
 633         return -ENODEV;
 634 }
 635 #endif
 636
 637 static int __devinit tc35815_init_dev_addr (struct net_device *dev)
 638 {
 639         struct tc35815_regs __iomem *tr =
 640                 (struct tc35815_regs __iomem *)dev->base_addr;
 641         int i;
 642
 643         while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 644                 ;
 645         for (i = 0; i < 6; i += 2) {
 646                 unsigned short data;
 647                 tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
 648                 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 649                         ;
 650                 data = tc_readl(&tr->PROM_Data);
 651                 dev->dev_addr[i] = data & 0xff;
 652                 dev->dev_addr[i+1] = data >> 8;
 653         }
 654         if (!is_valid_ether_addr(dev->dev_addr))
 655                 return tc35815_read_plat_dev_addr(dev);
 656         return 0;
 657 }
 658
 659 static int __devinit tc35815_init_one (struct pci_dev *pdev,
 660                                        const struct pci_device_id *ent)
 661 {
 662         void __iomem *ioaddr = NULL;
 663         struct net_device *dev;
 664         struct tc35815_local *lp;
 665         int rc;
 666         DECLARE_MAC_BUF(mac);
 667
 668         static int printed_version;
 669         if (!printed_version++) {
 670                 printk(version);
 671                 dev_printk(KERN_DEBUG, &pdev->dev,
 672                            "speed:%d duplex:%d doforce:%d\n",
 673                            options.speed, options.duplex, options.doforce);
 674         }
 675
 676         if (!pdev->irq) {
 677                 dev_warn(&pdev->dev, "no IRQ assigned.\n");
 678                 return -ENODEV;
 679         }
 680
 681         /* dev zeroed in alloc_etherdev */
 682         dev = alloc_etherdev (sizeof (*lp));
 683         if (dev == NULL) {
 684                 dev_err(&pdev->dev, "unable to alloc new ethernet\n");
 685                 return -ENOMEM;
 686         }
 687         SET_NETDEV_DEV(dev, &pdev->dev);
 688         lp = netdev_priv(dev);
 689         lp->dev = dev;
 690
 691         /* enable device (incl. PCI PM wakeup), and bus-mastering */
 692         rc = pcim_enable_device(pdev);
 693         if (rc)
 694                 goto err_out;
 695         rc = pcim_iomap_regions(pdev, 1 << 1, MODNAME);
 696         if (rc)
 697                 goto err_out;
 698         pci_set_master(pdev);
 699         ioaddr = pcim_iomap_table(pdev)[1];
 700
 701         /* Initialize the device structure. */
 702         dev->open = tc35815_open;
 703         dev->hard_start_xmit = tc35815_send_packet;
 704         dev->stop = tc35815_close;
 705         dev->get_stats = tc35815_get_stats;
 706         dev->set_multicast_list = tc35815_set_multicast_list;
 707         dev->do_ioctl = tc35815_ioctl;
 708         dev->ethtool_ops = &tc35815_ethtool_ops;
 709         dev->tx_timeout = tc35815_tx_timeout;
 710         dev->watchdog_timeo = TC35815_TX_TIMEOUT;
 711 #ifdef TC35815_NAPI
 712         netif_napi_add(dev, &lp->napi, tc35815_poll, NAPI_WEIGHT);
 713 #endif
 714 #ifdef CONFIG_NET_POLL_CONTROLLER
 715         dev->poll_controller = tc35815_poll_controller;
 716 #endif
 717
 718         dev->irq = pdev->irq;
 719         dev->base_addr = (unsigned long) ioaddr;
 720
 721         spin_lock_init(&lp->lock);
 722         lp->pci_dev = pdev;
 723         lp->boardtype = ent->driver_data;
 724
 725         lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
 726         pci_set_drvdata(pdev, dev);
 727
 728         /* Soft reset the chip. */
 729         tc35815_chip_reset(dev);
 730
 731         /* Retrieve the ethernet address. */
 732         if (tc35815_init_dev_addr(dev)) {
 733                 dev_warn(&pdev->dev, "not valid ether addr\n");
 734                 random_ether_addr(dev->dev_addr);
 735         }
 736
 737         rc = register_netdev (dev);
 738         if (rc)
 739                 goto err_out;
 740
 741         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
 742         printk(KERN_INFO "%s: %s at 0x%lx, %s, IRQ %d\n",
 743                 dev->name,
 744                 board_info[ent->driver_data].name,
 745                 dev->base_addr,
 746                 print_mac(mac, dev->dev_addr),
 747                 dev->irq);
 748
 749         setup_timer(&lp->timer, tc35815_timer, (unsigned long) dev);
 750         lp->mii.dev = dev;
 751         lp->mii.mdio_read = tc_mdio_read;
 752         lp->mii.mdio_write = tc_mdio_write;
 753         lp->mii.phy_id_mask = 0x1f;
 754         lp->mii.reg_num_mask = 0x1f;
 755         tc35815_find_phy(dev);
 756         lp->mii.phy_id = lp->phy_addr;
 757         lp->mii.full_duplex = 0;
 758         lp->mii.force_media = 0;
 759
 760         return 0;
 761
 762 err_out:
 763         free_netdev (dev);
 764         return rc;
 765 }
 766
 767
 768 static void __devexit tc35815_remove_one (struct pci_dev *pdev)
 769 {
 770         struct net_device *dev = pci_get_drvdata (pdev);
 771
 772         unregister_netdev (dev);
 773         free_netdev (dev);
 774
 775         pci_set_drvdata (pdev, NULL);
 776 }
 777
 778 static int
 779 tc35815_init_queues(struct net_device *dev)
 780 {
 781         struct tc35815_local *lp = netdev_priv(dev);
 782         int i;
 783         unsigned long fd_addr;
 784
 785         if (!lp->fd_buf) {
 786                 BUG_ON(sizeof(struct FDesc) +
 787                        sizeof(struct BDesc) * RX_BUF_NUM +
 788                        sizeof(struct FDesc) * RX_FD_NUM +
 789                        sizeof(struct TxFD) * TX_FD_NUM >
 790                        PAGE_SIZE * FD_PAGE_NUM);
 791
 792                 if ((lp->fd_buf = pci_alloc_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM, &lp->fd_buf_dma)) == 0)
 793                         return -ENOMEM;
 794                 for (i = 0; i < RX_BUF_NUM; i++) {
 795 #ifdef TC35815_USE_PACKEDBUFFER
 796                         if ((lp->data_buf[i] = alloc_rxbuf_page(lp->pci_dev, &lp->data_buf_dma[i])) == NULL) {
 797                                 while (--i >= 0) {
 798                                         free_rxbuf_page(lp->pci_dev,
 799                                                         lp->data_buf[i],
 800                                                         lp->data_buf_dma[i]);
 801                                         lp->data_buf[i] = NULL;
 802                                 }
 803                                 pci_free_consistent(lp->pci_dev,
 804                                                     PAGE_SIZE * FD_PAGE_NUM,
 805                                                     lp->fd_buf,
 806                                                     lp->fd_buf_dma);
 807                                 lp->fd_buf = NULL;
 808                                 return -ENOMEM;
 809                         }
 810 #else
 811                         lp->rx_skbs[i].skb =
 812                                 alloc_rxbuf_skb(dev, lp->pci_dev,
 813                                                 &lp->rx_skbs[i].skb_dma);
 814                         if (!lp->rx_skbs[i].skb) {
 815                                 while (--i >= 0) {
 816                                         free_rxbuf_skb(lp->pci_dev,
 817                                                        lp->rx_skbs[i].skb,
 818                                                        lp->rx_skbs[i].skb_dma);
 819                                         lp->rx_skbs[i].skb = NULL;
 820                                 }
 821                                 pci_free_consistent(lp->pci_dev,
 822                                                     PAGE_SIZE * FD_PAGE_NUM,
 823                                                     lp->fd_buf,
 824                                                     lp->fd_buf_dma);
 825                                 lp->fd_buf = NULL;
 826                                 return -ENOMEM;
 827                         }
 828 #endif
 829                 }
 830                 printk(KERN_DEBUG "%s: FD buf %p DataBuf",
 831                        dev->name, lp->fd_buf);
 832 #ifdef TC35815_USE_PACKEDBUFFER
 833                 printk(" DataBuf");
 834                 for (i = 0; i < RX_BUF_NUM; i++)
 835                         printk(" %p", lp->data_buf[i]);
 836 #endif
 837                 printk("\n");
 838         } else {
 839                 for (i = 0; i < FD_PAGE_NUM; i++) {
 840                         clear_page((void *)((unsigned long)lp->fd_buf + i * PAGE_SIZE));
 841                 }
 842         }
 843         fd_addr = (unsigned long)lp->fd_buf;
 844
 845         /* Free Descriptors (for Receive) */
 846         lp->rfd_base = (struct RxFD *)fd_addr;
 847         fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
 848         for (i = 0; i < RX_FD_NUM; i++) {
 849                 lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
 850         }
 851         lp->rfd_cur = lp->rfd_base;
 852         lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
 853
 854         /* Transmit Descriptors */
 855         lp->tfd_base = (struct TxFD *)fd_addr;
 856         fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
 857         for (i = 0; i < TX_FD_NUM; i++) {
 858                 lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
 859                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 860                 lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
 861         }
 862         lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
 863         lp->tfd_start = 0;
 864         lp->tfd_end = 0;
 865
 866         /* Buffer List (for Receive) */
 867         lp->fbl_ptr = (struct FrFD *)fd_addr;
 868         lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
 869         lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
 870 #ifndef TC35815_USE_PACKEDBUFFER
 871         /*
 872          * move all allocated skbs to head of rx_skbs[] array.
 873          * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
 874          * tc35815_rx() had failed.
 875          */
 876         lp->fbl_count = 0;
 877         for (i = 0; i < RX_BUF_NUM; i++) {
 878                 if (lp->rx_skbs[i].skb) {
 879                         if (i != lp->fbl_count) {
 880                                 lp->rx_skbs[lp->fbl_count].skb =
 881                                         lp->rx_skbs[i].skb;
 882                                 lp->rx_skbs[lp->fbl_count].skb_dma =
 883                                         lp->rx_skbs[i].skb_dma;
 884                         }
 885                         lp->fbl_count++;
 886                 }
 887         }
 888 #endif
 889         for (i = 0; i < RX_BUF_NUM; i++) {
 890 #ifdef TC35815_USE_PACKEDBUFFER
 891                 lp->fbl_ptr->bd[i].BuffData = cpu_to_le32(lp->data_buf_dma[i]);
 892 #else
 893                 if (i >= lp->fbl_count) {
 894                         lp->fbl_ptr->bd[i].BuffData = 0;
 895                         lp->fbl_ptr->bd[i].BDCtl = 0;
 896                         continue;
 897                 }
 898                 lp->fbl_ptr->bd[i].BuffData =
 899                         cpu_to_le32(lp->rx_skbs[i].skb_dma);
 900 #endif
 901                 /* BDID is index of FrFD.bd[] */
 902                 lp->fbl_ptr->bd[i].BDCtl =
 903                         cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
 904                                     RX_BUF_SIZE);
 905         }
 906 #ifdef TC35815_USE_PACKEDBUFFER
 907         lp->fbl_curid = 0;
 908 #endif
 909
 910         printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
 911                dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
 912         return 0;
 913 }
 914
 915 static void
 916 tc35815_clear_queues(struct net_device *dev)
 917 {
 918         struct tc35815_local *lp = netdev_priv(dev);
 919         int i;
 920
 921         for (i = 0; i < TX_FD_NUM; i++) {
 922                 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
 923                 struct sk_buff *skb =
 924                         fdsystem != 0xffffffff ?
 925                         lp->tx_skbs[fdsystem].skb : NULL;
 926 #ifdef DEBUG
 927                 if (lp->tx_skbs[i].skb != skb) {
 928                         printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
 929                         panic_queues(dev);
 930                 }
 931 #else
 932                 BUG_ON(lp->tx_skbs[i].skb != skb);
 933 #endif
 934                 if (skb) {
 935                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
 936                         lp->tx_skbs[i].skb = NULL;
 937                         lp->tx_skbs[i].skb_dma = 0;
 938                         dev_kfree_skb_any(skb);
 939                 }
 940                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 941         }
 942
 943         tc35815_init_queues(dev);
 944 }
 945
 946 static void
 947 tc35815_free_queues(struct net_device *dev)
 948 {
 949         struct tc35815_local *lp = netdev_priv(dev);
 950         int i;
 951
 952         if (lp->tfd_base) {
 953                 for (i = 0; i < TX_FD_NUM; i++) {
 954                         u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
 955                         struct sk_buff *skb =
 956                                 fdsystem != 0xffffffff ?
 957                                 lp->tx_skbs[fdsystem].skb : NULL;
 958 #ifdef DEBUG
 959                         if (lp->tx_skbs[i].skb != skb) {
 960                                 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
 961                                 panic_queues(dev);
 962                         }
 963 #else
 964                         BUG_ON(lp->tx_skbs[i].skb != skb);
 965 #endif
 966                         if (skb) {
 967                                 dev_kfree_skb(skb);
 968                                 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
 969                                 lp->tx_skbs[i].skb = NULL;
 970                                 lp->tx_skbs[i].skb_dma = 0;
 971                         }
 972                         lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 973                 }
 974         }
 975
 976         lp->rfd_base = NULL;
 977         lp->rfd_limit = NULL;
 978         lp->rfd_cur = NULL;
 979         lp->fbl_ptr = NULL;
 980
 981         for (i = 0; i < RX_BUF_NUM; i++) {
 982 #ifdef TC35815_USE_PACKEDBUFFER
 983                 if (lp->data_buf[i]) {
 984                         free_rxbuf_page(lp->pci_dev,
 985                                         lp->data_buf[i], lp->data_buf_dma[i]);
 986                         lp->data_buf[i] = NULL;
 987                 }
 988 #else
 989                 if (lp->rx_skbs[i].skb) {
 990                         free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
 991                                        lp->rx_skbs[i].skb_dma);
 992                         lp->rx_skbs[i].skb = NULL;
 993                 }
 994 #endif
 995         }
 996         if (lp->fd_buf) {
 997                 pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
 998                                     lp->fd_buf, lp->fd_buf_dma);
 999                 lp->fd_buf = NULL;
1000         }
1001 }
1002
1003 static void
1004 dump_txfd(struct TxFD *fd)
1005 {
1006         printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
1007                le32_to_cpu(fd->fd.FDNext),
1008                le32_to_cpu(fd->fd.FDSystem),
1009                le32_to_cpu(fd->fd.FDStat),
1010                le32_to_cpu(fd->fd.FDCtl));
1011         printk("BD: ");
1012         printk(" %08x %08x",
1013                le32_to_cpu(fd->bd.BuffData),
1014                le32_to_cpu(fd->bd.BDCtl));
1015         printk("\n");
1016 }
1017
1018 static int
1019 dump_rxfd(struct RxFD *fd)
1020 {
1021         int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1022         if (bd_count > 8)
1023                 bd_count = 8;
1024         printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
1025                le32_to_cpu(fd->fd.FDNext),
1026                le32_to_cpu(fd->fd.FDSystem),
1027                le32_to_cpu(fd->fd.FDStat),
1028                le32_to_cpu(fd->fd.FDCtl));
1029         if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
1030             return 0;
1031         printk("BD: ");
1032         for (i = 0; i < bd_count; i++)
1033                 printk(" %08x %08x",
1034                        le32_to_cpu(fd->bd[i].BuffData),
1035                        le32_to_cpu(fd->bd[i].BDCtl));
1036         printk("\n");
1037         return bd_count;
1038 }
1039
1040 #if defined(DEBUG) || defined(TC35815_USE_PACKEDBUFFER)
1041 static void
1042 dump_frfd(struct FrFD *fd)
1043 {
1044         int i;
1045         printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
1046                le32_to_cpu(fd->fd.FDNext),
1047                le32_to_cpu(fd->fd.FDSystem),
1048                le32_to_cpu(fd->fd.FDStat),
1049                le32_to_cpu(fd->fd.FDCtl));
1050         printk("BD: ");
1051         for (i = 0; i < RX_BUF_NUM; i++)
1052                 printk(" %08x %08x",
1053                        le32_to_cpu(fd->bd[i].BuffData),
1054                        le32_to_cpu(fd->bd[i].BDCtl));
1055         printk("\n");
1056 }
1057 #endif
1058
1059 #ifdef DEBUG
1060 static void
1061 panic_queues(struct net_device *dev)
1062 {
1063         struct tc35815_local *lp = netdev_priv(dev);
1064         int i;
1065
1066         printk("TxFD base %p, start %u, end %u\n",
1067                lp->tfd_base, lp->tfd_start, lp->tfd_end);
1068         printk("RxFD base %p limit %p cur %p\n",
1069                lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
1070         printk("FrFD %p\n", lp->fbl_ptr);
1071         for (i = 0; i < TX_FD_NUM; i++)
1072                 dump_txfd(&lp->tfd_base[i]);
1073         for (i = 0; i < RX_FD_NUM; i++) {
1074                 int bd_count = dump_rxfd(&lp->rfd_base[i]);
1075                 i += (bd_count + 1) / 2;        /* skip BDs */
1076         }
1077         dump_frfd(lp->fbl_ptr);
1078         panic("%s: Illegal queue state.", dev->name);
1079 }
1080 #endif
1081
1082 static void print_eth(const u8 *add)
1083 {
1084         DECLARE_MAC_BUF(mac);
1085
1086         printk(KERN_DEBUG "print_eth(%p)\n", add);
1087         printk(KERN_DEBUG " %s =>", print_mac(mac, add + 6));
1088         printk(KERN_CONT " %s : %02x%02x\n",
1089                 print_mac(mac, add), add[12], add[13]);
1090 }
1091
1092 static int tc35815_tx_full(struct net_device *dev)
1093 {
1094         struct tc35815_local *lp = netdev_priv(dev);
1095         return ((lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end);
1096 }
1097
1098 static void tc35815_restart(struct net_device *dev)
1099 {
1100         struct tc35815_local *lp = netdev_priv(dev);
1101         int pid = lp->phy_addr;
1102         int do_phy_reset = 1;
1103         del_timer(&lp->timer);          /* Kill if running      */
1104
1105         if (lp->mii_id[0] == 0x0016 && (lp->mii_id[1] & 0xfc00) == 0xf800) {
1106                 /* Resetting PHY cause problem on some chip... (SEEQ 80221) */
1107                 do_phy_reset = 0;
1108         }
1109         if (do_phy_reset) {
1110                 int timeout;
1111                 tc_mdio_write(dev, pid, MII_BMCR, BMCR_RESET);
1112                 timeout = 100;
1113                 while (--timeout) {
1114                         if (!(tc_mdio_read(dev, pid, MII_BMCR) & BMCR_RESET))
1115                                 break;
1116                         udelay(1);
1117                 }
1118                 if (!timeout)
1119                         printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
1120         }
1121
1122         tc35815_chip_reset(dev);
1123         tc35815_clear_queues(dev);
1124         tc35815_chip_init(dev);
1125         /* Reconfigure CAM again since tc35815_chip_init() initialize it. */
1126         tc35815_set_multicast_list(dev);
1127 }
1128
1129 static void tc35815_tx_timeout(struct net_device *dev)
1130 {
1131         struct tc35815_local *lp = netdev_priv(dev);
1132         struct tc35815_regs __iomem *tr =
1133                 (struct tc35815_regs __iomem *)dev->base_addr;
1134
1135         printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
1136                dev->name, tc_readl(&tr->Tx_Stat));
1137
1138         /* Try to restart the adaptor. */
1139         spin_lock_irq(&lp->lock);
1140         tc35815_restart(dev);
1141         spin_unlock_irq(&lp->lock);
1142
1143         dev->stats.tx_errors++;
1144
1145         /* If we have space available to accept new transmit
1146          * requests, wake up the queueing layer.  This would
1147          * be the case if the chipset_init() call above just
1148          * flushes out the tx queue and empties it.
1149          *
1150          * If instead, the tx queue is retained then the
1151          * netif_wake_queue() call should be placed in the
1152          * TX completion interrupt handler of the driver instead
1153          * of here.
1154          */
1155         if (!tc35815_tx_full(dev))
1156                 netif_wake_queue(dev);
1157 }
1158
1159 /*
1160  * Open/initialize the board. This is called (in the current kernel)
1161  * sometime after booting when the 'ifconfig' program is run.
1162  *
1163  * This routine should set everything up anew at each open, even
1164  * registers that "should" only need to be set once at boot, so that
1165  * there is non-reboot way to recover if something goes wrong.
1166  */
1167 static int
1168 tc35815_open(struct net_device *dev)
1169 {
1170         struct tc35815_local *lp = netdev_priv(dev);
1171
1172         /*
1173          * This is used if the interrupt line can turned off (shared).
1174          * See 3c503.c for an example of selecting the IRQ at config-time.
1175          */
1176         if (request_irq(dev->irq, &tc35815_interrupt, IRQF_SHARED, dev->name, dev)) {
1177                 return -EAGAIN;
1178         }
1179
1180         del_timer(&lp->timer);          /* Kill if running      */
1181         tc35815_chip_reset(dev);
1182
1183         if (tc35815_init_queues(dev) != 0) {
1184                 free_irq(dev->irq, dev);
1185                 return -EAGAIN;
1186         }
1187
1188 #ifdef TC35815_NAPI
1189         napi_enable(&lp->napi);
1190 #endif
1191
1192         /* Reset the hardware here. Don't forget to set the station address. */
1193         spin_lock_irq(&lp->lock);
1194         tc35815_chip_init(dev);
1195         spin_unlock_irq(&lp->lock);
1196
1197         /* We are now ready to accept transmit requeusts from
1198          * the queueing layer of the networking.
1199          */
1200         netif_start_queue(dev);
1201
1202         return 0;
1203 }
1204
1205 /* This will only be invoked if your driver is _not_ in XOFF state.
1206  * What this means is that you need not check it, and that this
1207  * invariant will hold if you make sure that the netif_*_queue()
1208  * calls are done at the proper times.
1209  */
1210 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
1211 {
1212         struct tc35815_local *lp = netdev_priv(dev);
1213         struct TxFD *txfd;
1214         unsigned long flags;
1215
1216         /* If some error occurs while trying to transmit this
1217          * packet, you should return '1' from this function.
1218          * In such a case you _may not_ do anything to the
1219          * SKB, it is still owned by the network queueing
1220          * layer when an error is returned.  This means you
1221          * may not modify any SKB fields, you may not free
1222          * the SKB, etc.
1223          */
1224
1225         /* This is the most common case for modern hardware.
1226          * The spinlock protects this code from the TX complete
1227          * hardware interrupt handler.  Queue flow control is
1228          * thus managed under this lock as well.
1229          */
1230         spin_lock_irqsave(&lp->lock, flags);
1231
1232         /* failsafe... (handle txdone now if half of FDs are used) */
1233         if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
1234             TX_FD_NUM / 2)
1235                 tc35815_txdone(dev);
1236
1237         if (netif_msg_pktdata(lp))
1238                 print_eth(skb->data);
1239 #ifdef DEBUG
1240         if (lp->tx_skbs[lp->tfd_start].skb) {
1241                 printk("%s: tx_skbs conflict.\n", dev->name);
1242                 panic_queues(dev);
1243         }
1244 #else
1245         BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
1246 #endif
1247         lp->tx_skbs[lp->tfd_start].skb = skb;
1248         lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1249
1250         /*add to ring */
1251         txfd = &lp->tfd_base[lp->tfd_start];
1252         txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
1253         txfd->bd.BDCtl = cpu_to_le32(skb->len);
1254         txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
1255         txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
1256
1257         if (lp->tfd_start == lp->tfd_end) {
1258                 struct tc35815_regs __iomem *tr =
1259                         (struct tc35815_regs __iomem *)dev->base_addr;
1260                 /* Start DMA Transmitter. */
1261                 txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1262 #ifdef GATHER_TXINT
1263                 txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1264 #endif
1265                 if (netif_msg_tx_queued(lp)) {
1266                         printk("%s: starting TxFD.\n", dev->name);
1267                         dump_txfd(txfd);
1268                 }
1269                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1270         } else {
1271                 txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
1272                 if (netif_msg_tx_queued(lp)) {
1273                         printk("%s: queueing TxFD.\n", dev->name);
1274                         dump_txfd(txfd);
1275                 }
1276         }
1277         lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
1278
1279         dev->trans_start = jiffies;
1280
1281         /* If we just used up the very last entry in the
1282          * TX ring on this device, tell the queueing
1283          * layer to send no more.
1284          */
1285         if (tc35815_tx_full(dev)) {
1286                 if (netif_msg_tx_queued(lp))
1287                         printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
1288                 netif_stop_queue(dev);
1289         }
1290
1291         /* When the TX completion hw interrupt arrives, this
1292          * is when the transmit statistics are updated.
1293          */
1294
1295         spin_unlock_irqrestore(&lp->lock, flags);
1296         return 0;
1297 }
1298
1299 #define FATAL_ERROR_INT \
1300         (Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
1301 static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
1302 {
1303         static int count;
1304         printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
1305                dev->name, status);
1306         if (status & Int_IntPCI)
1307                 printk(" IntPCI");
1308         if (status & Int_DmParErr)
1309                 printk(" DmParErr");
1310         if (status & Int_IntNRAbt)
1311                 printk(" IntNRAbt");
1312         printk("\n");
1313         if (count++ > 100)
1314                 panic("%s: Too many fatal errors.", dev->name);
1315         printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
1316         /* Try to restart the adaptor. */
1317         tc35815_restart(dev);
1318 }
1319
1320 #ifdef TC35815_NAPI
1321 static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
1322 #else
1323 static int tc35815_do_interrupt(struct net_device *dev, u32 status)
1324 #endif
1325 {
1326         struct tc35815_local *lp = netdev_priv(dev);
1327         struct tc35815_regs __iomem *tr =
1328                 (struct tc35815_regs __iomem *)dev->base_addr;
1329         int ret = -1;
1330
1331         /* Fatal errors... */
1332         if (status & FATAL_ERROR_INT) {
1333                 tc35815_fatal_error_interrupt(dev, status);
1334                 return 0;
1335         }
1336         /* recoverable errors */
1337         if (status & Int_IntFDAEx) {
1338                 /* disable FDAEx int. (until we make rooms...) */
1339                 tc_writel(tc_readl(&tr->Int_En) & ~Int_FDAExEn, &tr->Int_En);
1340                 printk(KERN_WARNING
1341                        "%s: Free Descriptor Area Exhausted (%#x).\n",
1342                        dev->name, status);
1343                 dev->stats.rx_dropped++;
1344                 ret = 0;
1345         }
1346         if (status & Int_IntBLEx) {
1347                 /* disable BLEx int. (until we make rooms...) */
1348                 tc_writel(tc_readl(&tr->Int_En) & ~Int_BLExEn, &tr->Int_En);
1349                 printk(KERN_WARNING
1350                        "%s: Buffer List Exhausted (%#x).\n",
1351                        dev->name, status);
1352                 dev->stats.rx_dropped++;
1353                 ret = 0;
1354         }
1355         if (status & Int_IntExBD) {
1356                 printk(KERN_WARNING
1357                        "%s: Excessive Buffer Descriptiors (%#x).\n",
1358                        dev->name, status);
1359                 dev->stats.rx_length_errors++;
1360                 ret = 0;
1361         }
1362
1363         /* normal notification */
1364         if (status & Int_IntMacRx) {
1365                 /* Got a packet(s). */
1366 #ifdef TC35815_NAPI
1367                 ret = tc35815_rx(dev, limit);
1368 #else
1369                 tc35815_rx(dev);
1370                 ret = 0;
1371 #endif
1372                 lp->lstats.rx_ints++;
1373         }
1374         if (status & Int_IntMacTx) {
1375                 /* Transmit complete. */
1376                 lp->lstats.tx_ints++;
1377                 tc35815_txdone(dev);
1378                 netif_wake_queue(dev);
1379                 ret = 0;
1380         }
1381         return ret;
1382 }
1383
1384 /*
1385  * The typical workload of the driver:
1386  * Handle the network interface interrupts.
1387  */
1388 static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
1389 {
1390         struct net_device *dev = dev_id;
1391         struct tc35815_local *lp = netdev_priv(dev);
1392         struct tc35815_regs __iomem *tr =
1393                 (struct tc35815_regs __iomem *)dev->base_addr;
1394 #ifdef TC35815_NAPI
1395         u32 dmactl = tc_readl(&tr->DMA_Ctl);
1396
1397         if (!(dmactl & DMA_IntMask)) {
1398                 /* disable interrupts */
1399                 tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
1400                 if (netif_rx_schedule_prep(dev, &lp->napi))
1401                         __netif_rx_schedule(dev, &lp->napi);
1402                 else {
1403                         printk(KERN_ERR "%s: interrupt taken in poll\n",
1404                                dev->name);
1405                         BUG();
1406                 }
1407                 (void)tc_readl(&tr->Int_Src);   /* flush */
1408                 return IRQ_HANDLED;
1409         }
1410         return IRQ_NONE;
1411 #else
1412         int handled;
1413         u32 status;
1414
1415         spin_lock(&lp->lock);
1416         status = tc_readl(&tr->Int_Src);
1417         tc_writel(status, &tr->Int_Src);        /* write to clear */
1418         handled = tc35815_do_interrupt(dev, status);
1419         (void)tc_readl(&tr->Int_Src);   /* flush */
1420         spin_unlock(&lp->lock);
1421         return IRQ_RETVAL(handled >= 0);
1422 #endif /* TC35815_NAPI */
1423 }
1424
1425 #ifdef CONFIG_NET_POLL_CONTROLLER
1426 static void tc35815_poll_controller(struct net_device *dev)
1427 {
1428         disable_irq(dev->irq);
1429         tc35815_interrupt(dev->irq, dev);
1430         enable_irq(dev->irq);
1431 }
1432 #endif
1433
1434 /* We have a good packet(s), get it/them out of the buffers. */
1435 #ifdef TC35815_NAPI
1436 static int
1437 tc35815_rx(struct net_device *dev, int limit)
1438 #else
1439 static void
1440 tc35815_rx(struct net_device *dev)
1441 #endif
1442 {
1443         struct tc35815_local *lp = netdev_priv(dev);
1444         unsigned int fdctl;
1445         int i;
1446         int buf_free_count = 0;
1447         int fd_free_count = 0;
1448 #ifdef TC35815_NAPI
1449         int received = 0;
1450 #endif
1451
1452         while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
1453                 int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
1454                 int pkt_len = fdctl & FD_FDLength_MASK;
1455                 int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1456 #ifdef DEBUG
1457                 struct RxFD *next_rfd;
1458 #endif
1459 #if (RX_CTL_CMD & Rx_StripCRC) == 0
1460                 pkt_len -= 4;
1461 #endif
1462
1463                 if (netif_msg_rx_status(lp))
1464                         dump_rxfd(lp->rfd_cur);
1465                 if (status & Rx_Good) {
1466                         struct sk_buff *skb;
1467                         unsigned char *data;
1468                         int cur_bd;
1469 #ifdef TC35815_USE_PACKEDBUFFER
1470                         int offset;
1471 #endif
1472
1473 #ifdef TC35815_NAPI
1474                         if (--limit < 0)
1475                                 break;
1476 #endif
1477 #ifdef TC35815_USE_PACKEDBUFFER
1478                         BUG_ON(bd_count > 2);
1479                         skb = dev_alloc_skb(pkt_len + 2); /* +2: for reserve */
1480                         if (skb == NULL) {
1481                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
1482                                        dev->name);
1483                                 dev->stats.rx_dropped++;
1484                                 break;
1485                         }
1486                         skb_reserve(skb, 2);   /* 16 bit alignment */
1487
1488                         data = skb_put(skb, pkt_len);
1489
1490                         /* copy from receive buffer */
1491                         cur_bd = 0;
1492                         offset = 0;
1493                         while (offset < pkt_len && cur_bd < bd_count) {
1494                                 int len = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BDCtl) &
1495                                         BD_BuffLength_MASK;
1496                                 dma_addr_t dma = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BuffData);
1497                                 void *rxbuf = rxbuf_bus_to_virt(lp, dma);
1498                                 if (offset + len > pkt_len)
1499                                         len = pkt_len - offset;
1500 #ifdef TC35815_DMA_SYNC_ONDEMAND
1501                                 pci_dma_sync_single_for_cpu(lp->pci_dev,
1502                                                             dma, len,
1503                                                             PCI_DMA_FROMDEVICE);
1504 #endif
1505                                 memcpy(data + offset, rxbuf, len);
1506 #ifdef TC35815_DMA_SYNC_ONDEMAND
1507                                 pci_dma_sync_single_for_device(lp->pci_dev,
1508                                                                dma, len,
1509                                                                PCI_DMA_FROMDEVICE);
1510 #endif
1511                                 offset += len;
1512                                 cur_bd++;
1513                         }
1514 #else /* TC35815_USE_PACKEDBUFFER */
1515                         BUG_ON(bd_count > 1);
1516                         cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
1517                                   & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1518 #ifdef DEBUG
1519                         if (cur_bd >= RX_BUF_NUM) {
1520                                 printk("%s: invalid BDID.\n", dev->name);
1521                                 panic_queues(dev);
1522                         }
1523                         BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
1524                                (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
1525                         if (!lp->rx_skbs[cur_bd].skb) {
1526                                 printk("%s: NULL skb.\n", dev->name);
1527                                 panic_queues(dev);
1528                         }
1529 #else
1530                         BUG_ON(cur_bd >= RX_BUF_NUM);
1531 #endif
1532                         skb = lp->rx_skbs[cur_bd].skb;
1533                         prefetch(skb->data);
1534                         lp->rx_skbs[cur_bd].skb = NULL;
1535                         lp->fbl_count--;
1536                         pci_unmap_single(lp->pci_dev,
1537                                          lp->rx_skbs[cur_bd].skb_dma,
1538                                          RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1539                         if (!HAVE_DMA_RXALIGN(lp))
1540                                 memmove(skb->data, skb->data - 2, pkt_len);
1541                         data = skb_put(skb, pkt_len);
1542 #endif /* TC35815_USE_PACKEDBUFFER */
1543                         if (netif_msg_pktdata(lp))
1544                                 print_eth(data);
1545                         skb->protocol = eth_type_trans(skb, dev);
1546 #ifdef TC35815_NAPI
1547                         netif_receive_skb(skb);
1548                         received++;
1549 #else
1550                         netif_rx(skb);
1551 #endif
1552                         dev->last_rx = jiffies;
1553                         dev->stats.rx_packets++;
1554                         dev->stats.rx_bytes += pkt_len;
1555                 } else {
1556                         dev->stats.rx_errors++;
1557                         printk(KERN_DEBUG "%s: Rx error (status %x)\n",
1558                                dev->name, status & Rx_Stat_Mask);
1559                         /* WORKAROUND: LongErr and CRCErr means Overflow. */
1560                         if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
1561                                 status &= ~(Rx_LongErr|Rx_CRCErr);
1562                                 status |= Rx_Over;
1563                         }
1564                         if (status & Rx_LongErr)
1565                                 dev->stats.rx_length_errors++;
1566                         if (status & Rx_Over)
1567                                 dev->stats.rx_fifo_errors++;
1568                         if (status & Rx_CRCErr)
1569                                 dev->stats.rx_crc_errors++;
1570                         if (status & Rx_Align)
1571                                 dev->stats.rx_frame_errors++;
1572                 }
1573
1574                 if (bd_count > 0) {
1575                         /* put Free Buffer back to controller */
1576                         int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
1577                         unsigned char id =
1578                                 (bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1579 #ifdef DEBUG
1580                         if (id >= RX_BUF_NUM) {
1581                                 printk("%s: invalid BDID.\n", dev->name);
1582                                 panic_queues(dev);
1583                         }
1584 #else
1585                         BUG_ON(id >= RX_BUF_NUM);
1586 #endif
1587                         /* free old buffers */
1588 #ifdef TC35815_USE_PACKEDBUFFER
1589                         while (lp->fbl_curid != id)
1590 #else
1591                         while (lp->fbl_count < RX_BUF_NUM)
1592 #endif
1593                         {
1594 #ifdef TC35815_USE_PACKEDBUFFER
1595                                 unsigned char curid = lp->fbl_curid;
1596 #else
1597                                 unsigned char curid =
1598                                         (id + 1 + lp->fbl_count) % RX_BUF_NUM;
1599 #endif
1600                                 struct BDesc *bd = &lp->fbl_ptr->bd[curid];
1601 #ifdef DEBUG
1602                                 bdctl = le32_to_cpu(bd->BDCtl);
1603                                 if (bdctl & BD_CownsBD) {
1604                                         printk("%s: Freeing invalid BD.\n",
1605                                                dev->name);
1606                                         panic_queues(dev);
1607                                 }
1608 #endif
1609                                 /* pass BD to controller */
1610 #ifndef TC35815_USE_PACKEDBUFFER
1611                                 if (!lp->rx_skbs[curid].skb) {
1612                                         lp->rx_skbs[curid].skb =
1613                                                 alloc_rxbuf_skb(dev,
1614                                                                 lp->pci_dev,
1615                                                                 &lp->rx_skbs[curid].skb_dma);
1616                                         if (!lp->rx_skbs[curid].skb)
1617                                                 break; /* try on next reception */
1618                                         bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
1619                                 }
1620 #endif /* TC35815_USE_PACKEDBUFFER */
1621                                 /* Note: BDLength was modified by chip. */
1622                                 bd->BDCtl = cpu_to_le32(BD_CownsBD |
1623                                                         (curid << BD_RxBDID_SHIFT) |
1624                                                         RX_BUF_SIZE);
1625 #ifdef TC35815_USE_PACKEDBUFFER
1626                                 lp->fbl_curid = (curid + 1) % RX_BUF_NUM;
1627                                 if (netif_msg_rx_status(lp)) {
1628                                         printk("%s: Entering new FBD %d\n",
1629                                                dev->name, lp->fbl_curid);
1630                                         dump_frfd(lp->fbl_ptr);
1631                                 }
1632 #else
1633                                 lp->fbl_count++;
1634 #endif
1635                                 buf_free_count++;
1636                         }
1637                 }
1638
1639                 /* put RxFD back to controller */
1640 #ifdef DEBUG
1641                 next_rfd = fd_bus_to_virt(lp,
1642                                           le32_to_cpu(lp->rfd_cur->fd.FDNext));
1643                 if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
1644                         printk("%s: RxFD FDNext invalid.\n", dev->name);
1645                         panic_queues(dev);
1646                 }
1647 #endif
1648                 for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
1649                         /* pass FD to controller */
1650 #ifdef DEBUG
1651                         lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
1652 #else
1653                         lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
1654 #endif
1655                         lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
1656                         lp->rfd_cur++;
1657                         fd_free_count++;
1658                 }
1659                 if (lp->rfd_cur > lp->rfd_limit)
1660                         lp->rfd_cur = lp->rfd_base;
1661 #ifdef DEBUG
1662                 if (lp->rfd_cur != next_rfd)
1663                         printk("rfd_cur = %p, next_rfd %p\n",
1664                                lp->rfd_cur, next_rfd);
1665 #endif
1666         }
1667
1668         /* re-enable BL/FDA Exhaust interrupts. */
1669         if (fd_free_count) {
1670                 struct tc35815_regs __iomem *tr =
1671                         (struct tc35815_regs __iomem *)dev->base_addr;
1672                 u32 en, en_old = tc_readl(&tr->Int_En);
1673                 en = en_old | Int_FDAExEn;
1674                 if (buf_free_count)
1675                         en |= Int_BLExEn;
1676                 if (en != en_old)
1677                         tc_writel(en, &tr->Int_En);
1678         }
1679 #ifdef TC35815_NAPI
1680         return received;
1681 #endif
1682 }
1683
1684 #ifdef TC35815_NAPI
1685 static int tc35815_poll(struct napi_struct *napi, int budget)
1686 {
1687         struct tc35815_local *lp = container_of(napi, struct tc35815_local, napi);
1688         struct net_device *dev = lp->dev;
1689         struct tc35815_regs __iomem *tr =
1690                 (struct tc35815_regs __iomem *)dev->base_addr;
1691         int received = 0, handled;
1692         u32 status;
1693
1694         spin_lock(&lp->lock);
1695         status = tc_readl(&tr->Int_Src);
1696         do {
1697                 tc_writel(status, &tr->Int_Src);        /* write to clear */
1698
1699                 handled = tc35815_do_interrupt(dev, status, limit);
1700                 if (handled >= 0) {
1701                         received += handled;
1702                         if (received >= budget)
1703                                 break;
1704                 }
1705                 status = tc_readl(&tr->Int_Src);
1706         } while (status);
1707         spin_unlock(&lp->lock);
1708
1709         if (received < budget) {
1710                 netif_rx_complete(dev, napi);
1711                 /* enable interrupts */
1712                 tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
1713         }
1714         return received;
1715 }
1716 #endif
1717
1718 #ifdef NO_CHECK_CARRIER
1719 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1720 #else
1721 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1722 #endif
1723
1724 static void
1725 tc35815_check_tx_stat(struct net_device *dev, int status)
1726 {
1727         struct tc35815_local *lp = netdev_priv(dev);
1728         const char *msg = NULL;
1729
1730         /* count collisions */
1731         if (status & Tx_ExColl)
1732                 dev->stats.collisions += 16;
1733         if (status & Tx_TxColl_MASK)
1734                 dev->stats.collisions += status & Tx_TxColl_MASK;
1735
1736 #ifndef NO_CHECK_CARRIER
1737         /* TX4939 does not have NCarr */
1738         if (lp->boardtype == TC35815_TX4939)
1739                 status &= ~Tx_NCarr;
1740 #ifdef WORKAROUND_LOSTCAR
1741         /* WORKAROUND: ignore LostCrS in full duplex operation */
1742         if ((lp->timer_state != asleep && lp->timer_state != lcheck)
1743             || lp->fullduplex)
1744                 status &= ~Tx_NCarr;
1745 #endif
1746 #endif
1747
1748         if (!(status & TX_STA_ERR)) {
1749                 /* no error. */
1750                 dev->stats.tx_packets++;
1751                 return;
1752         }
1753
1754         dev->stats.tx_errors++;
1755         if (status & Tx_ExColl) {
1756                 dev->stats.tx_aborted_errors++;
1757                 msg = "Excessive Collision.";
1758         }
1759         if (status & Tx_Under) {
1760                 dev->stats.tx_fifo_errors++;
1761                 msg = "Tx FIFO Underrun.";
1762                 if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
1763                         lp->lstats.tx_underrun++;
1764                         if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
1765                                 struct tc35815_regs __iomem *tr =
1766                                         (struct tc35815_regs __iomem *)dev->base_addr;
1767                                 tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
1768                                 msg = "Tx FIFO Underrun.Change Tx threshold to max.";
1769                         }
1770                 }
1771         }
1772         if (status & Tx_Defer) {
1773                 dev->stats.tx_fifo_errors++;
1774                 msg = "Excessive Deferral.";
1775         }
1776 #ifndef NO_CHECK_CARRIER
1777         if (status & Tx_NCarr) {
1778                 dev->stats.tx_carrier_errors++;
1779                 msg = "Lost Carrier Sense.";
1780         }
1781 #endif
1782         if (status & Tx_LateColl) {
1783                 dev->stats.tx_aborted_errors++;
1784                 msg = "Late Collision.";
1785         }
1786         if (status & Tx_TxPar) {
1787                 dev->stats.tx_fifo_errors++;
1788                 msg = "Transmit Parity Error.";
1789         }
1790         if (status & Tx_SQErr) {
1791                 dev->stats.tx_heartbeat_errors++;
1792                 msg = "Signal Quality Error.";
1793         }
1794         if (msg && netif_msg_tx_err(lp))
1795                 printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
1796 }
1797
1798 /* This handles TX complete events posted by the device
1799  * via interrupts.
1800  */
1801 static void
1802 tc35815_txdone(struct net_device *dev)
1803 {
1804         struct tc35815_local *lp = netdev_priv(dev);
1805         struct TxFD *txfd;
1806         unsigned int fdctl;
1807
1808         txfd = &lp->tfd_base[lp->tfd_end];
1809         while (lp->tfd_start != lp->tfd_end &&
1810                !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
1811                 int status = le32_to_cpu(txfd->fd.FDStat);
1812                 struct sk_buff *skb;
1813                 unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
1814                 u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
1815
1816                 if (netif_msg_tx_done(lp)) {
1817                         printk("%s: complete TxFD.\n", dev->name);
1818                         dump_txfd(txfd);
1819                 }
1820                 tc35815_check_tx_stat(dev, status);
1821
1822                 skb = fdsystem != 0xffffffff ?
1823                         lp->tx_skbs[fdsystem].skb : NULL;
1824 #ifdef DEBUG
1825                 if (lp->tx_skbs[lp->tfd_end].skb != skb) {
1826                         printk("%s: tx_skbs mismatch.\n", dev->name);
1827                         panic_queues(dev);
1828                 }
1829 #else
1830                 BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
1831 #endif
1832                 if (skb) {
1833                         dev->stats.tx_bytes += skb->len;
1834                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
1835                         lp->tx_skbs[lp->tfd_end].skb = NULL;
1836                         lp->tx_skbs[lp->tfd_end].skb_dma = 0;
1837 #ifdef TC35815_NAPI
1838                         dev_kfree_skb_any(skb);
1839 #else
1840                         dev_kfree_skb_irq(skb);
1841 #endif
1842                 }
1843                 txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
1844
1845                 lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
1846                 txfd = &lp->tfd_base[lp->tfd_end];
1847 #ifdef DEBUG
1848                 if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
1849                         printk("%s: TxFD FDNext invalid.\n", dev->name);
1850                         panic_queues(dev);
1851                 }
1852 #endif
1853                 if (fdnext & FD_Next_EOL) {
1854                         /* DMA Transmitter has been stopping... */
1855                         if (lp->tfd_end != lp->tfd_start) {
1856                                 struct tc35815_regs __iomem *tr =
1857                                         (struct tc35815_regs __iomem *)dev->base_addr;
1858                                 int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
1859                                 struct TxFD* txhead = &lp->tfd_base[head];
1860                                 int qlen = (lp->tfd_start + TX_FD_NUM
1861                                             - lp->tfd_end) % TX_FD_NUM;
1862
1863 #ifdef DEBUG
1864                                 if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
1865                                         printk("%s: TxFD FDCtl invalid.\n", dev->name);
1866                                         panic_queues(dev);
1867                                 }
1868 #endif
1869                                 /* log max queue length */
1870                                 if (lp->lstats.max_tx_qlen < qlen)
1871                                         lp->lstats.max_tx_qlen = qlen;
1872
1873
1874                                 /* start DMA Transmitter again */
1875                                 txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1876 #ifdef GATHER_TXINT
1877                                 txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1878 #endif
1879                                 if (netif_msg_tx_queued(lp)) {
1880                                         printk("%s: start TxFD on queue.\n",
1881                                                dev->name);
1882                                         dump_txfd(txfd);
1883                                 }
1884                                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1885                         }
1886                         break;
1887                 }
1888         }
1889
1890         /* If we had stopped the queue due to a "tx full"
1891          * condition, and space has now been made available,
1892          * wake up the queue.
1893          */
1894         if (netif_queue_stopped(dev) && ! tc35815_tx_full(dev))
1895                 netif_wake_queue(dev);
1896 }
1897
1898 /* The inverse routine to tc35815_open(). */
1899 static int
1900 tc35815_close(struct net_device *dev)
1901 {
1902         struct tc35815_local *lp = netdev_priv(dev);
1903
1904         netif_stop_queue(dev);
1905 #ifdef TC35815_NAPI
1906         napi_disable(&lp->napi);
1907 #endif
1908
1909         /* Flush the Tx and disable Rx here. */
1910
1911         del_timer(&lp->timer);          /* Kill if running      */
1912         tc35815_chip_reset(dev);
1913         free_irq(dev->irq, dev);
1914
1915         tc35815_free_queues(dev);
1916
1917         return 0;
1918
1919 }
1920
1921 /*
1922  * Get the current statistics.
1923  * This may be called with the card open or closed.
1924  */
1925 static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
1926 {
1927         struct tc35815_regs __iomem *tr =
1928                 (struct tc35815_regs __iomem *)dev->base_addr;
1929         if (netif_running(dev))
1930                 /* Update the statistics from the device registers. */
1931                 dev->stats.rx_missed_errors = tc_readl(&tr->Miss_Cnt);
1932
1933         return &dev->stats;
1934 }
1935
1936 static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
1937 {
1938         struct tc35815_local *lp = netdev_priv(dev);
1939         struct tc35815_regs __iomem *tr =
1940                 (struct tc35815_regs __iomem *)dev->base_addr;
1941         int cam_index = index * 6;
1942         u32 cam_data;
1943         u32 saved_addr;
1944         DECLARE_MAC_BUF(mac);
1945
1946         saved_addr = tc_readl(&tr->CAM_Adr);
1947
1948         if (netif_msg_hw(lp))
1949                 printk(KERN_DEBUG "%s: CAM %d: %s\n",
1950                         dev->name, index, print_mac(mac, addr));
1951         if (index & 1) {
1952                 /* read modify write */
1953                 tc_writel(cam_index - 2, &tr->CAM_Adr);
1954                 cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
1955                 cam_data |= addr[0] << 8 | addr[1];
1956                 tc_writel(cam_data, &tr->CAM_Data);
1957                 /* write whole word */
1958                 tc_writel(cam_index + 2, &tr->CAM_Adr);
1959                 cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
1960                 tc_writel(cam_data, &tr->CAM_Data);
1961         } else {
1962                 /* write whole word */
1963                 tc_writel(cam_index, &tr->CAM_Adr);
1964                 cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
1965                 tc_writel(cam_data, &tr->CAM_Data);
1966                 /* read modify write */
1967                 tc_writel(cam_index + 4, &tr->CAM_Adr);
1968                 cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
1969                 cam_data |= addr[4] << 24 | (addr[5] << 16);
1970                 tc_writel(cam_data, &tr->CAM_Data);
1971         }
1972
1973         tc_writel(saved_addr, &tr->CAM_Adr);
1974 }
1975
1976
1977 /*
1978  * Set or clear the multicast filter for this adaptor.
1979  * num_addrs == -1      Promiscuous mode, receive all packets
1980  * num_addrs == 0       Normal mode, clear multicast list
1981  * num_addrs > 0        Multicast mode, receive normal and MC packets,
1982  *                      and do best-effort filtering.
1983  */
1984 static void
1985 tc35815_set_multicast_list(struct net_device *dev)
1986 {
1987         struct tc35815_regs __iomem *tr =
1988                 (struct tc35815_regs __iomem *)dev->base_addr;
1989
1990         if (dev->flags&IFF_PROMISC)
1991         {
1992 #ifdef WORKAROUND_100HALF_PROMISC
1993                 /* With some (all?) 100MHalf HUB, controller will hang
1994                  * if we enabled promiscuous mode before linkup... */
1995                 struct tc35815_local *lp = netdev_priv(dev);
1996                 int pid = lp->phy_addr;
1997                 if (!(tc_mdio_read(dev, pid, MII_BMSR) & BMSR_LSTATUS))
1998                         return;
1999 #endif
2000                 /* Enable promiscuous mode */
2001                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
2002         }
2003         else if((dev->flags&IFF_ALLMULTI) || dev->mc_count > CAM_ENTRY_MAX - 3)
2004         {
2005                 /* CAM 0, 1, 20 are reserved. */
2006                 /* Disable promiscuous mode, use normal mode. */
2007                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
2008         }
2009         else if(dev->mc_count)
2010         {
2011                 struct dev_mc_list* cur_addr = dev->mc_list;
2012                 int i;
2013                 int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
2014
2015                 tc_writel(0, &tr->CAM_Ctl);
2016                 /* Walk the address list, and load the filter */
2017                 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
2018                         if (!cur_addr)
2019                                 break;
2020                         /* entry 0,1 is reserved. */
2021                         tc35815_set_cam_entry(dev, i + 2, cur_addr->dmi_addr);
2022                         ena_bits |= CAM_Ena_Bit(i + 2);
2023                 }
2024                 tc_writel(ena_bits, &tr->CAM_Ena);
2025                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2026         }
2027         else {
2028                 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2029                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2030         }
2031 }
2032
2033 static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2034 {
2035         struct tc35815_local *lp = netdev_priv(dev);
2036         strcpy(info->driver, MODNAME);
2037         strcpy(info->version, DRV_VERSION);
2038         strcpy(info->bus_info, pci_name(lp->pci_dev));
2039 }
2040
2041 static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2042 {
2043         struct tc35815_local *lp = netdev_priv(dev);
2044         spin_lock_irq(&lp->lock);
2045         mii_ethtool_gset(&lp->mii, cmd);
2046         spin_unlock_irq(&lp->lock);
2047         return 0;
2048 }
2049
2050 static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2051 {
2052         struct tc35815_local *lp = netdev_priv(dev);
2053         int rc;
2054 #if 1   /* use our negotiation method... */
2055         /* Verify the settings we care about. */
2056         if (cmd->autoneg != AUTONEG_ENABLE &&
2057             cmd->autoneg != AUTONEG_DISABLE)
2058                 return -EINVAL;
2059         if (cmd->autoneg == AUTONEG_DISABLE &&
2060             ((cmd->speed != SPEED_100 &&
2061               cmd->speed != SPEED_10) ||
2062              (cmd->duplex != DUPLEX_HALF &&
2063               cmd->duplex != DUPLEX_FULL)))
2064                 return -EINVAL;
2065
2066         /* Ok, do it to it. */
2067         spin_lock_irq(&lp->lock);
2068         del_timer(&lp->timer);
2069         tc35815_start_auto_negotiation(dev, cmd);
2070         spin_unlock_irq(&lp->lock);
2071         rc = 0;
2072 #else
2073         spin_lock_irq(&lp->lock);
2074         rc = mii_ethtool_sset(&lp->mii, cmd);
2075         spin_unlock_irq(&lp->lock);
2076 #endif
2077         return rc;
2078 }
2079
2080 static int tc35815_nway_reset(struct net_device *dev)
2081 {
2082         struct tc35815_local *lp = netdev_priv(dev);
2083         int rc;
2084         spin_lock_irq(&lp->lock);
2085         rc = mii_nway_restart(&lp->mii);
2086         spin_unlock_irq(&lp->lock);
2087         return rc;
2088 }
2089
2090 static u32 tc35815_get_link(struct net_device *dev)
2091 {
2092         struct tc35815_local *lp = netdev_priv(dev);
2093         int rc;
2094         spin_lock_irq(&lp->lock);
2095         rc = mii_link_ok(&lp->mii);
2096         spin_unlock_irq(&lp->lock);
2097         return rc;
2098 }
2099
2100 static u32 tc35815_get_msglevel(struct net_device *dev)
2101 {
2102         struct tc35815_local *lp = netdev_priv(dev);
2103         return lp->msg_enable;
2104 }
2105
2106 static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
2107 {
2108         struct tc35815_local *lp = netdev_priv(dev);
2109         lp->msg_enable = datum;
2110 }
2111
2112 static int tc35815_get_sset_count(struct net_device *dev, int sset)
2113 {
2114         struct tc35815_local *lp = netdev_priv(dev);
2115
2116         switch (sset) {
2117         case ETH_SS_STATS:
2118                 return sizeof(lp->lstats) / sizeof(int);
2119         default:
2120                 return -EOPNOTSUPP;
2121         }
2122 }
2123
2124 static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2125 {
2126         struct tc35815_local *lp = netdev_priv(dev);
2127         data[0] = lp->lstats.max_tx_qlen;
2128         data[1] = lp->lstats.tx_ints;
2129         data[2] = lp->lstats.rx_ints;
2130         data[3] = lp->lstats.tx_underrun;
2131 }
2132
2133 static struct {
2134         const char str[ETH_GSTRING_LEN];
2135 } ethtool_stats_keys[] = {
2136         { "max_tx_qlen" },
2137         { "tx_ints" },
2138         { "rx_ints" },
2139         { "tx_underrun" },
2140 };
2141
2142 static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2143 {
2144         memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2145 }
2146
2147 static const struct ethtool_ops tc35815_ethtool_ops = {
2148         .get_drvinfo            = tc35815_get_drvinfo,
2149         .get_settings           = tc35815_get_settings,
2150         .set_settings           = tc35815_set_settings,
2151         .nway_reset             = tc35815_nway_reset,
2152         .get_link               = tc35815_get_link,
2153         .get_msglevel           = tc35815_get_msglevel,
2154         .set_msglevel           = tc35815_set_msglevel,
2155         .get_strings            = tc35815_get_strings,
2156         .get_sset_count         = tc35815_get_sset_count,
2157         .get_ethtool_stats      = tc35815_get_ethtool_stats,
2158 };
2159
2160 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2161 {
2162         struct tc35815_local *lp = netdev_priv(dev);
2163         int rc;
2164
2165         if (!netif_running(dev))
2166                 return -EINVAL;
2167
2168         spin_lock_irq(&lp->lock);
2169         rc = generic_mii_ioctl(&lp->mii, if_mii(rq), cmd, NULL);
2170         spin_unlock_irq(&lp->lock);
2171
2172         return rc;
2173 }
2174
2175 static int tc_mdio_read(struct net_device *dev, int phy_id, int location)
2176 {
2177         struct tc35815_regs __iomem *tr =
2178                 (struct tc35815_regs __iomem *)dev->base_addr;
2179         u32 data;
2180         tc_writel(MD_CA_Busy | (phy_id << 5) | location, &tr->MD_CA);
2181         while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
2182                 ;
2183         data = tc_readl(&tr->MD_Data);
2184         return data & 0xffff;
2185 }
2186
2187 static void tc_mdio_write(struct net_device *dev, int phy_id, int location,
2188                           int val)
2189 {
2190         struct tc35815_regs __iomem *tr =
2191                 (struct tc35815_regs __iomem *)dev->base_addr;
2192         tc_writel(val, &tr->MD_Data);
2193         tc_writel(MD_CA_Busy | MD_CA_Wr | (phy_id << 5) | location, &tr->MD_CA);
2194         while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
2195                 ;
2196 }
2197
2198 /* Auto negotiation.  The scheme is very simple.  We have a timer routine
2199  * that keeps watching the auto negotiation process as it progresses.
2200  * The DP83840 is first told to start doing it's thing, we set up the time
2201  * and place the timer state machine in it's initial state.
2202  *
2203  * Here the timer peeks at the DP83840 status registers at each click to see
2204  * if the auto negotiation has completed, we assume here that the DP83840 PHY
2205  * will time out at some point and just tell us what (didn't) happen.  For
2206  * complete coverage we only allow so many of the ticks at this level to run,
2207  * when this has expired we print a warning message and try another strategy.
2208  * This "other" strategy is to force the interface into various speed/duplex
2209  * configurations and we stop when we see a link-up condition before the
2210  * maximum number of "peek" ticks have occurred.
2211  *
2212  * Once a valid link status has been detected we configure the BigMAC and
2213  * the rest of the Happy Meal to speak the most efficient protocol we could
2214  * get a clean link for.  The priority for link configurations, highest first
2215  * is:
2216  *                 100 Base-T Full Duplex
2217  *                 100 Base-T Half Duplex
2218  *                 10 Base-T Full Duplex
2219  *                 10 Base-T Half Duplex
2220  *
2221  * We start a new timer now, after a successful auto negotiation status has
2222  * been detected.  This timer just waits for the link-up bit to get set in
2223  * the BMCR of the DP83840.  When this occurs we print a kernel log message
2224  * describing the link type in use and the fact that it is up.
2225  *
2226  * If a fatal error of some sort is signalled and detected in the interrupt
2227  * service routine, and the chip is reset, or the link is ifconfig'd down
2228  * and then back up, this entire process repeats itself all over again.
2229  */
2230 /* Note: Above comments are come from sunhme driver. */
2231
2232 static int tc35815_try_next_permutation(struct net_device *dev)
2233 {
2234         struct tc35815_local *lp = netdev_priv(dev);
2235         int pid = lp->phy_addr;
2236         unsigned short bmcr;
2237
2238         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2239
2240         /* Downgrade from full to half duplex.  Only possible via ethtool.  */
2241         if (bmcr & BMCR_FULLDPLX) {
2242                 bmcr &= ~BMCR_FULLDPLX;
2243                 printk(KERN_DEBUG "%s: try next permutation (BMCR %x)\n", dev->name, bmcr);
2244                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2245                 return 0;
2246         }
2247
2248         /* Downgrade from 100 to 10. */
2249         if (bmcr & BMCR_SPEED100) {
2250                 bmcr &= ~BMCR_SPEED100;
2251                 printk(KERN_DEBUG "%s: try next permutation (BMCR %x)\n", dev->name, bmcr);
2252                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2253                 return 0;
2254         }
2255
2256         /* We've tried everything. */
2257         return -1;
2258 }
2259
2260 static void
2261 tc35815_display_link_mode(struct net_device *dev)
2262 {
2263         struct tc35815_local *lp = netdev_priv(dev);
2264         int pid = lp->phy_addr;
2265         unsigned short lpa, bmcr;
2266         char *speed = "", *duplex = "";
2267
2268         lpa = tc_mdio_read(dev, pid, MII_LPA);
2269         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2270         if (options.speed ? (bmcr & BMCR_SPEED100) : (lpa & (LPA_100HALF | LPA_100FULL)))
2271                 speed = "100Mb/s";
2272         else
2273                 speed = "10Mb/s";
2274         if (options.duplex ? (bmcr & BMCR_FULLDPLX) : (lpa & (LPA_100FULL | LPA_10FULL)))
2275                 duplex = "Full Duplex";
2276         else
2277                 duplex = "Half Duplex";
2278
2279         if (netif_msg_link(lp))
2280                 printk(KERN_INFO "%s: Link is up at %s, %s.\n",
2281                        dev->name, speed, duplex);
2282         printk(KERN_DEBUG "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
2283                dev->name,
2284                bmcr, tc_mdio_read(dev, pid, MII_BMSR), lpa);
2285 }
2286
2287 static void tc35815_display_forced_link_mode(struct net_device *dev)
2288 {
2289         struct tc35815_local *lp = netdev_priv(dev);
2290         int pid = lp->phy_addr;
2291         unsigned short bmcr;
2292         char *speed = "", *duplex = "";
2293
2294         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2295         if (bmcr & BMCR_SPEED100)
2296                 speed = "100Mb/s";
2297         else
2298                 speed = "10Mb/s";
2299         if (bmcr & BMCR_FULLDPLX)
2300                 duplex = "Full Duplex.\n";
2301         else
2302                 duplex = "Half Duplex.\n";
2303
2304         if (netif_msg_link(lp))
2305                 printk(KERN_INFO "%s: Link has been forced up at %s, %s",
2306                        dev->name, speed, duplex);
2307 }
2308
2309 static void tc35815_set_link_modes(struct net_device *dev)
2310 {
2311         struct tc35815_local *lp = netdev_priv(dev);
2312         struct tc35815_regs __iomem *tr =
2313                 (struct tc35815_regs __iomem *)dev->base_addr;
2314         int pid = lp->phy_addr;
2315         unsigned short bmcr, lpa;
2316         int speed;
2317
2318         if (lp->timer_state == arbwait) {
2319                 lpa = tc_mdio_read(dev, pid, MII_LPA);
2320                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2321                 printk(KERN_DEBUG "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
2322                        dev->name,
2323                        bmcr, tc_mdio_read(dev, pid, MII_BMSR), lpa);
2324                 if (!(lpa & (LPA_10HALF | LPA_10FULL |
2325                              LPA_100HALF | LPA_100FULL))) {
2326                         /* fall back to 10HALF */
2327                         printk(KERN_INFO "%s: bad ability %04x - falling back to 10HD.\n",
2328                                dev->name, lpa);
2329                         lpa = LPA_10HALF;
2330                 }
2331                 if (options.duplex ? (bmcr & BMCR_FULLDPLX) : (lpa & (LPA_100FULL | LPA_10FULL)))
2332                         lp->fullduplex = 1;
2333                 else
2334                         lp->fullduplex = 0;
2335                 if (options.speed ? (bmcr & BMCR_SPEED100) : (lpa & (LPA_100HALF | LPA_100FULL)))
2336                         speed = 100;
2337                 else
2338                         speed = 10;
2339         } else {
2340                 /* Forcing a link mode. */
2341                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2342                 if (bmcr & BMCR_FULLDPLX)
2343                         lp->fullduplex = 1;
2344                 else
2345                         lp->fullduplex = 0;
2346                 if (bmcr & BMCR_SPEED100)
2347                         speed = 100;
2348                 else
2349                         speed = 10;
2350         }
2351
2352         tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_HaltReq, &tr->MAC_Ctl);
2353         if (lp->fullduplex) {
2354                 tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_FullDup, &tr->MAC_Ctl);
2355         } else {
2356                 tc_writel(tc_readl(&tr->MAC_Ctl) & ~MAC_FullDup, &tr->MAC_Ctl);
2357         }
2358         tc_writel(tc_readl(&tr->MAC_Ctl) & ~MAC_HaltReq, &tr->MAC_Ctl);
2359
2360         /* TX4939 PCFG.SPEEDn bit will be changed on NETDEV_CHANGE event. */
2361
2362 #ifndef NO_CHECK_CARRIER
2363         /* TX4939 does not have EnLCarr */
2364         if (lp->boardtype != TC35815_TX4939) {
2365 #ifdef WORKAROUND_LOSTCAR
2366                 /* WORKAROUND: enable LostCrS only if half duplex operation */
2367                 if (!lp->fullduplex && lp->boardtype != TC35815_TX4939)
2368                         tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr, &tr->Tx_Ctl);
2369 #endif
2370         }
2371 #endif
2372         lp->mii.full_duplex = lp->fullduplex;
2373 }
2374
2375 static void tc35815_timer(unsigned long data)
2376 {
2377         struct net_device *dev = (struct net_device *)data;
2378         struct tc35815_local *lp = netdev_priv(dev);
2379         int pid = lp->phy_addr;
2380         unsigned short bmsr, bmcr, lpa;
2381         int restart_timer = 0;
2382
2383         spin_lock_irq(&lp->lock);
2384
2385         lp->timer_ticks++;
2386         switch (lp->timer_state) {
2387         case arbwait:
2388                 /*
2389                  * Only allow for 5 ticks, thats 10 seconds and much too
2390                  * long to wait for arbitration to complete.
2391                  */
2392                 /* TC35815 need more times... */
2393                 if (lp->timer_ticks >= 10) {
2394                         /* Enter force mode. */
2395                         if (!options.doforce) {
2396                                 printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful,"
2397                                        " cable probblem?\n", dev->name);
2398                                 /* Try to restart the adaptor. */
2399                                 tc35815_restart(dev);
2400                                 goto out;
2401                         }
2402                         printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful,"
2403                                " trying force link mode\n", dev->name);
2404                         printk(KERN_DEBUG "%s: BMCR %x BMSR %x\n", dev->name,
2405                                tc_mdio_read(dev, pid, MII_BMCR),
2406                                tc_mdio_read(dev, pid, MII_BMSR));
2407                         bmcr = BMCR_SPEED100;
2408                         tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2409
2410                         /*
2411                          * OK, seems we need do disable the transceiver
2412                          * for the first tick to make sure we get an
2413                          * accurate link state at the second tick.
2414                          */
2415
2416                         lp->timer_state = ltrywait;
2417                         lp->timer_ticks = 0;
2418                         restart_timer = 1;
2419                 } else {
2420                         /* Anything interesting happen? */
2421                         bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2422                         if (bmsr & BMSR_ANEGCOMPLETE) {
2423                                 /* Just what we've been waiting for... */
2424                                 tc35815_set_link_modes(dev);
2425
2426                                 /*
2427                                  * Success, at least so far, advance our state
2428                                  * engine.
2429                                  */
2430                                 lp->timer_state = lupwait;
2431                                 restart_timer = 1;
2432                         } else {
2433                                 restart_timer = 1;
2434                         }
2435                 }
2436                 break;
2437
2438         case lupwait:
2439                 /*
2440                  * Auto negotiation was successful and we are awaiting a
2441                  * link up status.  I have decided to let this timer run
2442                  * forever until some sort of error is signalled, reporting
2443                  * a message to the user at 10 second intervals.
2444                  */
2445                 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2446                 if (bmsr & BMSR_LSTATUS) {
2447                         /*
2448                          * Wheee, it's up, display the link mode in use and put
2449                          * the timer to sleep.
2450                          */
2451                         tc35815_display_link_mode(dev);
2452                         netif_carrier_on(dev);
2453 #ifdef WORKAROUND_100HALF_PROMISC
2454                         /* delayed promiscuous enabling */
2455                         if (dev->flags & IFF_PROMISC)
2456                                 tc35815_set_multicast_list(dev);
2457 #endif
2458 #if 1
2459                         lp->saved_lpa = tc_mdio_read(dev, pid, MII_LPA);
2460                         lp->timer_state = lcheck;
2461                         restart_timer = 1;
2462 #else
2463                         lp->timer_state = asleep;
2464                         restart_timer = 0;
2465 #endif
2466                 } else {
2467                         if (lp->timer_ticks >= 10) {
2468                                 printk(KERN_NOTICE "%s: Auto negotiation successful, link still "
2469                                        "not completely up.\n", dev->name);
2470                                 lp->timer_ticks = 0;
2471                                 restart_timer = 1;
2472                         } else {
2473                                 restart_timer = 1;
2474                         }
2475                 }
2476                 break;
2477
2478         case ltrywait:
2479                 /*
2480                  * Making the timeout here too long can make it take
2481                  * annoyingly long to attempt all of the link mode
2482                  * permutations, but then again this is essentially
2483                  * error recovery code for the most part.
2484                  */
2485                 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2486                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2487                 if (lp->timer_ticks == 1) {
2488                         /*
2489                          * Re-enable transceiver, we'll re-enable the
2490                          * transceiver next tick, then check link state
2491                          * on the following tick.
2492                          */
2493                         restart_timer = 1;
2494                         break;
2495                 }
2496                 if (lp->timer_ticks == 2) {
2497                         restart_timer = 1;
2498                         break;
2499                 }
2500                 if (bmsr & BMSR_LSTATUS) {
2501                         /* Force mode selection success. */
2502                         tc35815_display_forced_link_mode(dev);
2503                         netif_carrier_on(dev);
2504                         tc35815_set_link_modes(dev);
2505 #ifdef WORKAROUND_100HALF_PROMISC
2506                         /* delayed promiscuous enabling */
2507                         if (dev->flags & IFF_PROMISC)
2508                                 tc35815_set_multicast_list(dev);
2509 #endif
2510 #if 1
2511                         lp->saved_lpa = tc_mdio_read(dev, pid, MII_LPA);
2512                         lp->timer_state = lcheck;
2513                         restart_timer = 1;
2514 #else
2515                         lp->timer_state = asleep;
2516                         restart_timer = 0;
2517 #endif
2518                 } else {
2519                         if (lp->timer_ticks >= 4) { /* 6 seconds or so... */
2520                                 int ret;
2521
2522                                 ret = tc35815_try_next_permutation(dev);
2523                                 if (ret == -1) {
2524                                         /*
2525                                          * Aieee, tried them all, reset the
2526                                          * chip and try all over again.
2527                                          */
2528                                         printk(KERN_NOTICE "%s: Link down, "
2529                                                "cable problem?\n",
2530                                                dev->name);
2531
2532                                         /* Try to restart the adaptor. */
2533                                         tc35815_restart(dev);
2534                                         goto out;
2535                                 }
2536                                 lp->timer_ticks = 0;
2537                                 restart_timer = 1;
2538                         } else {
2539                                 restart_timer = 1;
2540                         }
2541                 }
2542                 break;
2543
2544         case lcheck:
2545                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2546                 lpa = tc_mdio_read(dev, pid, MII_LPA);
2547                 if (bmcr & (BMCR_PDOWN | BMCR_ISOLATE | BMCR_RESET)) {
2548                         printk(KERN_ERR "%s: PHY down? (BMCR %x)\n", dev->name,
2549                                bmcr);
2550                 } else if ((lp->saved_lpa ^ lpa) &
2551                            (LPA_100FULL|LPA_100HALF|LPA_10FULL|LPA_10HALF)) {
2552                         printk(KERN_NOTICE "%s: link status changed"
2553                                " (BMCR %x LPA %x->%x)\n", dev->name,
2554                                bmcr, lp->saved_lpa, lpa);
2555                 } else {
2556                         /* go on */
2557                         restart_timer = 1;
2558                         break;
2559                 }
2560                 /* Try to restart the adaptor. */
2561                 tc35815_restart(dev);
2562                 goto out;
2563
2564         case asleep:
2565         default:
2566                 /* Can't happens.... */
2567                 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got "
2568                        "one anyways!\n", dev->name);
2569                 restart_timer = 0;
2570                 lp->timer_ticks = 0;
2571                 lp->timer_state = asleep; /* foo on you */
2572                 break;
2573         }
2574
2575         if (restart_timer) {
2576                 lp->timer.expires = jiffies + msecs_to_jiffies(1200);
2577                 add_timer(&lp->timer);
2578         }
2579 out:
2580         spin_unlock_irq(&lp->lock);
2581 }
2582
2583 static void tc35815_start_auto_negotiation(struct net_device *dev,
2584                                            struct ethtool_cmd *ep)
2585 {
2586         struct tc35815_local *lp = netdev_priv(dev);
2587         int pid = lp->phy_addr;
2588         unsigned short bmsr, bmcr, advertize;
2589         int timeout;
2590
2591         netif_carrier_off(dev);
2592         bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2593         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2594         advertize = tc_mdio_read(dev, pid, MII_ADVERTISE);
2595
2596         if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
2597                 if (options.speed || options.duplex) {
2598                         /* Advertise only specified configuration. */
2599                         advertize &= ~(ADVERTISE_10HALF |
2600                                        ADVERTISE_10FULL |
2601                                        ADVERTISE_100HALF |
2602                                        ADVERTISE_100FULL);
2603                         if (options.speed != 10) {
2604                                 if (options.duplex != 1)
2605                                         advertize |= ADVERTISE_100FULL;
2606                                 if (options.duplex != 2)
2607                                         advertize |= ADVERTISE_100HALF;
2608                         }
2609                         if (options.speed != 100) {
2610                                 if (options.duplex != 1)
2611                                         advertize |= ADVERTISE_10FULL;
2612                                 if (options.duplex != 2)
2613                                         advertize |= ADVERTISE_10HALF;
2614                         }
2615                         if (options.speed == 100)
2616                                 bmcr |= BMCR_SPEED100;
2617                         else if (options.speed == 10)
2618                                 bmcr &= ~BMCR_SPEED100;
2619                         if (options.duplex == 2)
2620                                 bmcr |= BMCR_FULLDPLX;
2621                         else if (options.duplex == 1)
2622                                 bmcr &= ~BMCR_FULLDPLX;
2623                 } else {
2624                         /* Advertise everything we can support. */
2625                         if (bmsr & BMSR_10HALF)
2626                                 advertize |= ADVERTISE_10HALF;
2627                         else
2628                                 advertize &= ~ADVERTISE_10HALF;
2629                         if (bmsr & BMSR_10FULL)
2630                                 advertize |= ADVERTISE_10FULL;
2631                         else
2632                                 advertize &= ~ADVERTISE_10FULL;
2633                         if (bmsr & BMSR_100HALF)
2634                                 advertize |= ADVERTISE_100HALF;
2635                         else
2636                                 advertize &= ~ADVERTISE_100HALF;
2637                         if (bmsr & BMSR_100FULL)
2638                                 advertize |= ADVERTISE_100FULL;
2639                         else
2640                                 advertize &= ~ADVERTISE_100FULL;
2641                 }
2642
2643                 tc_mdio_write(dev, pid, MII_ADVERTISE, advertize);
2644
2645                 /* Enable Auto-Negotiation, this is usually on already... */
2646                 bmcr |= BMCR_ANENABLE;
2647                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2648
2649                 /* Restart it to make sure it is going. */
2650                 bmcr |= BMCR_ANRESTART;
2651                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2652                 printk(KERN_DEBUG "%s: ADVERTISE %x BMCR %x\n", dev->name, advertize, bmcr);
2653
2654                 /* BMCR_ANRESTART self clears when the process has begun. */
2655                 timeout = 64;  /* More than enough. */
2656                 while (--timeout) {
2657                         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2658                         if (!(bmcr & BMCR_ANRESTART))
2659                                 break; /* got it. */
2660                         udelay(10);
2661                 }
2662                 if (!timeout) {
2663                         printk(KERN_ERR "%s: TC35815 would not start auto "
2664                                "negotiation BMCR=0x%04x\n",
2665                                dev->name, bmcr);
2666                         printk(KERN_NOTICE "%s: Performing force link "
2667                                "detection.\n", dev->name);
2668                         goto force_link;
2669                 } else {
2670                         printk(KERN_DEBUG "%s: auto negotiation started.\n", dev->name);
2671                         lp->timer_state = arbwait;
2672                 }
2673         } else {
2674 force_link:
2675                 /* Force the link up, trying first a particular mode.
2676                  * Either we are here at the request of ethtool or
2677                  * because the Happy Meal would not start to autoneg.
2678                  */
2679
2680                 /* Disable auto-negotiation in BMCR, enable the duplex and
2681                  * speed setting, init the timer state machine, and fire it off.
2682                  */
2683                 if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
2684                         bmcr = BMCR_SPEED100;
2685                 } else {
2686                         if (ep->speed == SPEED_100)
2687                                 bmcr = BMCR_SPEED100;
2688                         else
2689                                 bmcr = 0;
2690                         if (ep->duplex == DUPLEX_FULL)
2691                                 bmcr |= BMCR_FULLDPLX;
2692                 }
2693                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2694
2695                 /* OK, seems we need do disable the transceiver for the first
2696                  * tick to make sure we get an accurate link state at the
2697                  * second tick.
2698                  */
2699                 lp->timer_state = ltrywait;
2700         }
2701
2702         del_timer(&lp->timer);
2703         lp->timer_ticks = 0;
2704         lp->timer.expires = jiffies + msecs_to_jiffies(1200);
2705         add_timer(&lp->timer);
2706 }
2707
2708 static void tc35815_find_phy(struct net_device *dev)
2709 {
2710         struct tc35815_local *lp = netdev_priv(dev);
2711         int pid = lp->phy_addr;
2712         unsigned short id0;
2713
2714         /* find MII phy */
2715         for (pid = 31; pid >= 0; pid--) {
2716                 id0 = tc_mdio_read(dev, pid, MII_BMSR);
2717                 if (id0 != 0xffff && id0 != 0x0000 &&
2718                     (id0 & BMSR_RESV) != (0xffff & BMSR_RESV) /* paranoia? */
2719                         ) {
2720                         lp->phy_addr = pid;
2721                         break;
2722                 }
2723         }
2724         if (pid < 0) {
2725                 printk(KERN_ERR "%s: No MII Phy found.\n",
2726                        dev->name);
2727                 lp->phy_addr = pid = 0;
2728         }
2729
2730         lp->mii_id[0] = tc_mdio_read(dev, pid, MII_PHYSID1);
2731         lp->mii_id[1] = tc_mdio_read(dev, pid, MII_PHYSID2);
2732         if (netif_msg_hw(lp))
2733                 printk(KERN_INFO "%s: PHY(%02x) ID %04x %04x\n", dev->name,
2734                        pid, lp->mii_id[0], lp->mii_id[1]);
2735 }
2736
2737 static void tc35815_phy_chip_init(struct net_device *dev)
2738 {
2739         struct tc35815_local *lp = netdev_priv(dev);
2740         int pid = lp->phy_addr;
2741         unsigned short bmcr;
2742         struct ethtool_cmd ecmd, *ep;
2743
2744         /* dis-isolate if needed. */
2745         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2746         if (bmcr & BMCR_ISOLATE) {
2747                 int count = 32;
2748                 printk(KERN_DEBUG "%s: unisolating...", dev->name);
2749                 tc_mdio_write(dev, pid, MII_BMCR, bmcr & ~BMCR_ISOLATE);
2750                 while (--count) {
2751                         if (!(tc_mdio_read(dev, pid, MII_BMCR) & BMCR_ISOLATE))
2752                                 break;
2753                         udelay(20);
2754                 }
2755                 printk(" %s.\n", count ? "done" : "failed");
2756         }
2757
2758         if (options.speed && options.duplex) {
2759                 ecmd.autoneg = AUTONEG_DISABLE;
2760                 ecmd.speed = options.speed == 10 ? SPEED_10 : SPEED_100;
2761                 ecmd.duplex = options.duplex == 1 ? DUPLEX_HALF : DUPLEX_FULL;
2762                 ep = &ecmd;
2763         } else {
2764                 ep = NULL;
2765         }
2766         tc35815_start_auto_negotiation(dev, ep);
2767 }
2768
2769 static void tc35815_chip_reset(struct net_device *dev)
2770 {
2771         struct tc35815_regs __iomem *tr =
2772                 (struct tc35815_regs __iomem *)dev->base_addr;
2773         int i;
2774         /* reset the controller */
2775         tc_writel(MAC_Reset, &tr->MAC_Ctl);
2776         udelay(4); /* 3200ns */
2777         i = 0;
2778         while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
2779                 if (i++ > 100) {
2780                         printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
2781                         break;
2782                 }
2783                 mdelay(1);
2784         }
2785         tc_writel(0, &tr->MAC_Ctl);
2786
2787         /* initialize registers to default value */
2788         tc_writel(0, &tr->DMA_Ctl);
2789         tc_writel(0, &tr->TxThrsh);
2790         tc_writel(0, &tr->TxPollCtr);
2791         tc_writel(0, &tr->RxFragSize);
2792         tc_writel(0, &tr->Int_En);
2793         tc_writel(0, &tr->FDA_Bas);
2794         tc_writel(0, &tr->FDA_Lim);
2795         tc_writel(0xffffffff, &tr->Int_Src);    /* Write 1 to clear */
2796         tc_writel(0, &tr->CAM_Ctl);
2797         tc_writel(0, &tr->Tx_Ctl);
2798         tc_writel(0, &tr->Rx_Ctl);
2799         tc_writel(0, &tr->CAM_Ena);
2800         (void)tc_readl(&tr->Miss_Cnt);  /* Read to clear */
2801
2802         /* initialize internal SRAM */
2803         tc_writel(DMA_TestMode, &tr->DMA_Ctl);
2804         for (i = 0; i < 0x1000; i += 4) {
2805                 tc_writel(i, &tr->CAM_Adr);
2806                 tc_writel(0, &tr->CAM_Data);
2807         }
2808         tc_writel(0, &tr->DMA_Ctl);
2809 }
2810
2811 static void tc35815_chip_init(struct net_device *dev)
2812 {
2813         struct tc35815_local *lp = netdev_priv(dev);
2814         struct tc35815_regs __iomem *tr =
2815                 (struct tc35815_regs __iomem *)dev->base_addr;
2816         unsigned long txctl = TX_CTL_CMD;
2817
2818         tc35815_phy_chip_init(dev);
2819
2820         /* load station address to CAM */
2821         tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
2822
2823         /* Enable CAM (broadcast and unicast) */
2824         tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2825         tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2826
2827         /* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
2828         if (HAVE_DMA_RXALIGN(lp))
2829                 tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
2830         else
2831                 tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
2832 #ifdef TC35815_USE_PACKEDBUFFER
2833         tc_writel(RxFrag_EnPack | ETH_ZLEN, &tr->RxFragSize);   /* Packing */
2834 #else
2835         tc_writel(ETH_ZLEN, &tr->RxFragSize);
2836 #endif
2837         tc_writel(0, &tr->TxPollCtr);   /* Batch mode */
2838         tc_writel(TX_THRESHOLD, &tr->TxThrsh);
2839         tc_writel(INT_EN_CMD, &tr->Int_En);
2840
2841         /* set queues */
2842         tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
2843         tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
2844                   &tr->FDA_Lim);
2845         /*
2846          * Activation method:
2847          * First, enable the MAC Transmitter and the DMA Receive circuits.
2848          * Then enable the DMA Transmitter and the MAC Receive circuits.
2849          */
2850         tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr);      /* start DMA receiver */
2851         tc_writel(RX_CTL_CMD, &tr->Rx_Ctl);     /* start MAC receiver */
2852
2853         /* start MAC transmitter */
2854 #ifndef NO_CHECK_CARRIER
2855         /* TX4939 does not have EnLCarr */
2856         if (lp->boardtype == TC35815_TX4939)
2857                 txctl &= ~Tx_EnLCarr;
2858 #ifdef WORKAROUND_LOSTCAR
2859         /* WORKAROUND: ignore LostCrS in full duplex operation */
2860         if ((lp->timer_state != asleep && lp->timer_state != lcheck) ||
2861             lp->fullduplex)
2862                 txctl &= ~Tx_EnLCarr;
2863 #endif
2864 #endif /* !NO_CHECK_CARRIER */
2865 #ifdef GATHER_TXINT
2866         txctl &= ~Tx_EnComp;    /* disable global tx completion int. */
2867 #endif
2868         tc_writel(txctl, &tr->Tx_Ctl);
2869 }
2870
2871 #ifdef CONFIG_PM
2872 static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
2873 {
2874         struct net_device *dev = pci_get_drvdata(pdev);
2875         struct tc35815_local *lp = netdev_priv(dev);
2876         unsigned long flags;
2877
2878         pci_save_state(pdev);
2879         if (!netif_running(dev))
2880                 return 0;
2881         netif_device_detach(dev);
2882         spin_lock_irqsave(&lp->lock, flags);
2883         del_timer(&lp->timer);          /* Kill if running      */
2884         tc35815_chip_reset(dev);
2885         spin_unlock_irqrestore(&lp->lock, flags);
2886         pci_set_power_state(pdev, PCI_D3hot);
2887         return 0;
2888 }
2889
2890 static int tc35815_resume(struct pci_dev *pdev)
2891 {
2892         struct net_device *dev = pci_get_drvdata(pdev);
2893         struct tc35815_local *lp = netdev_priv(dev);
2894         unsigned long flags;
2895
2896         pci_restore_state(pdev);
2897         if (!netif_running(dev))
2898                 return 0;
2899         pci_set_power_state(pdev, PCI_D0);
2900         spin_lock_irqsave(&lp->lock, flags);
2901         tc35815_restart(dev);
2902         spin_unlock_irqrestore(&lp->lock, flags);
2903         netif_device_attach(dev);
2904         return 0;
2905 }
2906 #endif /* CONFIG_PM */
2907
2908 static struct pci_driver tc35815_pci_driver = {
2909         .name           = MODNAME,
2910         .id_table       = tc35815_pci_tbl,
2911         .probe          = tc35815_init_one,
2912         .remove         = __devexit_p(tc35815_remove_one),
2913 #ifdef CONFIG_PM
2914         .suspend        = tc35815_suspend,
2915         .resume         = tc35815_resume,
2916 #endif
2917 };
2918
2919 module_param_named(speed, options.speed, int, 0);
2920 MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
2921 module_param_named(duplex, options.duplex, int, 0);
2922 MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
2923 module_param_named(doforce, options.doforce, int, 0);
2924 MODULE_PARM_DESC(doforce, "try force link mode if auto-negotiation failed");
2925
2926 static int __init tc35815_init_module(void)
2927 {
2928         return pci_register_driver(&tc35815_pci_driver);
2929 }
2930
2931 static void __exit tc35815_cleanup_module(void)
2932 {
2933         pci_unregister_driver(&tc35815_pci_driver);
2934 }
2935
2936 module_init(tc35815_init_module);
2937 module_exit(tc35815_cleanup_module);
2938
2939 MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
2940 MODULE_LICENSE("GPL");