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

   1 /*
   2  * tc35815.c: A TOSHIBA TC35815CF PCI 10/100Mbps ethernet driver for linux.
   3  *
   4  * Based on skelton.c by Donald Becker.
   5  *
   6  * This driver is a replacement of older and less maintained version.
   7  * This is a header of the older version:
   8  *      -----<snip>-----
   9  *      Copyright 2001 MontaVista Software Inc.
  10  *      Author: MontaVista Software, Inc.
  11  *              ahennessy@mvista.com
  12  *      Copyright (C) 2000-2001 Toshiba Corporation
  13  *      static const char *version =
  14  *              "tc35815.c:v0.00 26/07/2000 by Toshiba Corporation\n";
  15  *      -----<snip>-----
  16  *
  17  * This file is subject to the terms and conditions of the GNU General Public
  18  * License.  See the file "COPYING" in the main directory of this archive
  19  * for more details.
  20  *
  21  * (C) Copyright TOSHIBA CORPORATION 2004-2005
  22  * All Rights Reserved.
  23  */
  24
  25 #ifdef TC35815_NAPI
  26 #define DRV_VERSION     "1.36-NAPI"
  27 #else
  28 #define DRV_VERSION     "1.36"
  29 #endif
  30 static const char *version = "tc35815.c:v" DRV_VERSION "\n";
  31 #define MODNAME                 "tc35815"
  32
  33 #include <linux/module.h>
  34 #include <linux/kernel.h>
  35 #include <linux/types.h>
  36 #include <linux/fcntl.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/ioport.h>
  39 #include <linux/in.h>
  40 #include <linux/slab.h>
  41 #include <linux/string.h>
  42 #include <linux/spinlock.h>
  43 #include <linux/errno.h>
  44 #include <linux/init.h>
  45 #include <linux/netdevice.h>
  46 #include <linux/etherdevice.h>
  47 #include <linux/skbuff.h>
  48 #include <linux/delay.h>
  49 #include <linux/pci.h>
  50 #include <linux/mii.h>
  51 #include <linux/ethtool.h>
  52 #include <linux/platform_device.h>
  53 #include <asm/io.h>
  54 #include <asm/byteorder.h>
  55
  56 /* First, a few definitions that the brave might change. */
  57
  58 #define GATHER_TXINT    /* On-Demand Tx Interrupt */
  59 #define WORKAROUND_LOSTCAR
  60 #define WORKAROUND_100HALF_PROMISC
  61 /* #define TC35815_USE_PACKEDBUFFER */
  62
  63 typedef enum {
  64         TC35815CF = 0,
  65         TC35815_NWU,
  66         TC35815_TX4939,
  67 } board_t;
  68
  69 /* indexed by board_t, above */
  70 static const struct {
  71         const char *name;
  72 } board_info[] __devinitdata = {
  73         { "TOSHIBA TC35815CF 10/100BaseTX" },
  74         { "TOSHIBA TC35815 with Wake on LAN" },
  75         { "TOSHIBA TC35815/TX4939" },
  76 };
  77
  78 static const struct pci_device_id tc35815_pci_tbl[] = {
  79         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815CF), .driver_data = TC35815CF },
  80         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_NWU), .driver_data = TC35815_NWU },
  81         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939), .driver_data = TC35815_TX4939 },
  82         {0,}
  83 };
  84 MODULE_DEVICE_TABLE (pci, tc35815_pci_tbl);
  85
  86 /* see MODULE_PARM_DESC */
  87 static struct tc35815_options {
  88         int speed;
  89         int duplex;
  90         int doforce;
  91 } options;
  92
  93 /*
  94  * Registers
  95  */
  96 struct tc35815_regs {
  97         volatile __u32 DMA_Ctl;         /* 0x00 */
  98         volatile __u32 TxFrmPtr;
  99         volatile __u32 TxThrsh;
 100         volatile __u32 TxPollCtr;
 101         volatile __u32 BLFrmPtr;
 102         volatile __u32 RxFragSize;
 103         volatile __u32 Int_En;
 104         volatile __u32 FDA_Bas;
 105         volatile __u32 FDA_Lim;         /* 0x20 */
 106         volatile __u32 Int_Src;
 107         volatile __u32 unused0[2];
 108         volatile __u32 PauseCnt;
 109         volatile __u32 RemPauCnt;
 110         volatile __u32 TxCtlFrmStat;
 111         volatile __u32 unused1;
 112         volatile __u32 MAC_Ctl;         /* 0x40 */
 113         volatile __u32 CAM_Ctl;
 114         volatile __u32 Tx_Ctl;
 115         volatile __u32 Tx_Stat;
 116         volatile __u32 Rx_Ctl;
 117         volatile __u32 Rx_Stat;
 118         volatile __u32 MD_Data;
 119         volatile __u32 MD_CA;
 120         volatile __u32 CAM_Adr;         /* 0x60 */
 121         volatile __u32 CAM_Data;
 122         volatile __u32 CAM_Ena;
 123         volatile __u32 PROM_Ctl;
 124         volatile __u32 PROM_Data;
 125         volatile __u32 Algn_Cnt;
 126         volatile __u32 CRC_Cnt;
 127         volatile __u32 Miss_Cnt;
 128 };
 129
 130 /*
 131  * Bit assignments
 132  */
 133 /* DMA_Ctl bit asign ------------------------------------------------------- */
 134 #define DMA_RxAlign            0x00c00000 /* 1:Reception Alignment           */
 135 #define DMA_RxAlign_1          0x00400000
 136 #define DMA_RxAlign_2          0x00800000
 137 #define DMA_RxAlign_3          0x00c00000
 138 #define DMA_M66EnStat          0x00080000 /* 1:66MHz Enable State            */
 139 #define DMA_IntMask            0x00040000 /* 1:Interupt mask                 */
 140 #define DMA_SWIntReq           0x00020000 /* 1:Software Interrupt request    */
 141 #define DMA_TxWakeUp           0x00010000 /* 1:Transmit Wake Up              */
 142 #define DMA_RxBigE             0x00008000 /* 1:Receive Big Endian            */
 143 #define DMA_TxBigE             0x00004000 /* 1:Transmit Big Endian           */
 144 #define DMA_TestMode           0x00002000 /* 1:Test Mode                     */
 145 #define DMA_PowrMgmnt          0x00001000 /* 1:Power Management              */
 146 #define DMA_DmBurst_Mask       0x000001fc /* DMA Burst size                  */
 147
 148 /* RxFragSize bit asign ---------------------------------------------------- */
 149 #define RxFrag_EnPack          0x00008000 /* 1:Enable Packing                */
 150 #define RxFrag_MinFragMask     0x00000ffc /* Minimum Fragment                */
 151
 152 /* MAC_Ctl bit asign ------------------------------------------------------- */
 153 #define MAC_Link10             0x00008000 /* 1:Link Status 10Mbits           */
 154 #define MAC_EnMissRoll         0x00002000 /* 1:Enable Missed Roll            */
 155 #define MAC_MissRoll           0x00000400 /* 1:Missed Roll                   */
 156 #define MAC_Loop10             0x00000080 /* 1:Loop 10 Mbps                  */
 157 #define MAC_Conn_Auto          0x00000000 /*00:Connection mode (Automatic)   */
 158 #define MAC_Conn_10M           0x00000020 /*01:                (10Mbps endec)*/
 159 #define MAC_Conn_Mll           0x00000040 /*10:                (Mll clock)   */
 160 #define MAC_MacLoop            0x00000010 /* 1:MAC Loopback                  */
 161 #define MAC_FullDup            0x00000008 /* 1:Full Duplex 0:Half Duplex     */
 162 #define MAC_Reset              0x00000004 /* 1:Software Reset                */
 163 #define MAC_HaltImm            0x00000002 /* 1:Halt Immediate                */
 164 #define MAC_HaltReq            0x00000001 /* 1:Halt request                  */
 165
 166 /* PROM_Ctl bit asign ------------------------------------------------------ */
 167 #define PROM_Busy              0x00008000 /* 1:Busy (Start Operation)        */
 168 #define PROM_Read              0x00004000 /*10:Read operation                */
 169 #define PROM_Write             0x00002000 /*01:Write operation               */
 170 #define PROM_Erase             0x00006000 /*11:Erase operation               */
 171                                           /*00:Enable or Disable Writting,   */
 172                                           /*      as specified in PROM_Addr. */
 173 #define PROM_Addr_Ena          0x00000030 /*11xxxx:PROM Write enable         */
 174                                           /*00xxxx:           disable        */
 175
 176 /* CAM_Ctl bit asign ------------------------------------------------------- */
 177 #define CAM_CompEn             0x00000010 /* 1:CAM Compare Enable            */
 178 #define CAM_NegCAM             0x00000008 /* 1:Reject packets CAM recognizes,*/
 179                                           /*                    accept other */
 180 #define CAM_BroadAcc           0x00000004 /* 1:Broadcast assept              */
 181 #define CAM_GroupAcc           0x00000002 /* 1:Multicast assept              */
 182 #define CAM_StationAcc         0x00000001 /* 1:unicast accept                */
 183
 184 /* CAM_Ena bit asign ------------------------------------------------------- */
 185 #define CAM_ENTRY_MAX                  21   /* CAM Data entry max count      */
 186 #define CAM_Ena_Mask ((1<<CAM_ENTRY_MAX)-1) /* CAM Enable bits (Max 21bits)  */
 187 #define CAM_Ena_Bit(index)         (1<<(index))
 188 #define CAM_ENTRY_DESTINATION   0
 189 #define CAM_ENTRY_SOURCE        1
 190 #define CAM_ENTRY_MACCTL        20
 191
 192 /* Tx_Ctl bit asign -------------------------------------------------------- */
 193 #define Tx_En                  0x00000001 /* 1:Transmit enable               */
 194 #define Tx_TxHalt              0x00000002 /* 1:Transmit Halt Request         */
 195 #define Tx_NoPad               0x00000004 /* 1:Suppress Padding              */
 196 #define Tx_NoCRC               0x00000008 /* 1:Suppress Padding              */
 197 #define Tx_FBack               0x00000010 /* 1:Fast Back-off                 */
 198 #define Tx_EnUnder             0x00000100 /* 1:Enable Underrun               */
 199 #define Tx_EnExDefer           0x00000200 /* 1:Enable Excessive Deferral     */
 200 #define Tx_EnLCarr             0x00000400 /* 1:Enable Lost Carrier           */
 201 #define Tx_EnExColl            0x00000800 /* 1:Enable Excessive Collision    */
 202 #define Tx_EnLateColl          0x00001000 /* 1:Enable Late Collision         */
 203 #define Tx_EnTxPar             0x00002000 /* 1:Enable Transmit Parity        */
 204 #define Tx_EnComp              0x00004000 /* 1:Enable Completion             */
 205
 206 /* Tx_Stat bit asign ------------------------------------------------------- */
 207 #define Tx_TxColl_MASK         0x0000000F /* Tx Collision Count              */
 208 #define Tx_ExColl              0x00000010 /* Excessive Collision             */
 209 #define Tx_TXDefer             0x00000020 /* Transmit Defered                */
 210 #define Tx_Paused              0x00000040 /* Transmit Paused                 */
 211 #define Tx_IntTx               0x00000080 /* Interrupt on Tx                 */
 212 #define Tx_Under               0x00000100 /* Underrun                        */
 213 #define Tx_Defer               0x00000200 /* Deferral                        */
 214 #define Tx_NCarr               0x00000400 /* No Carrier                      */
 215 #define Tx_10Stat              0x00000800 /* 10Mbps Status                   */
 216 #define Tx_LateColl            0x00001000 /* Late Collision                  */
 217 #define Tx_TxPar               0x00002000 /* Tx Parity Error                 */
 218 #define Tx_Comp                0x00004000 /* Completion                      */
 219 #define Tx_Halted              0x00008000 /* Tx Halted                       */
 220 #define Tx_SQErr               0x00010000 /* Signal Quality Error(SQE)       */
 221
 222 /* Rx_Ctl bit asign -------------------------------------------------------- */
 223 #define Rx_EnGood              0x00004000 /* 1:Enable Good                   */
 224 #define Rx_EnRxPar             0x00002000 /* 1:Enable Receive Parity         */
 225 #define Rx_EnLongErr           0x00000800 /* 1:Enable Long Error             */
 226 #define Rx_EnOver              0x00000400 /* 1:Enable OverFlow               */
 227 #define Rx_EnCRCErr            0x00000200 /* 1:Enable CRC Error              */
 228 #define Rx_EnAlign             0x00000100 /* 1:Enable Alignment              */
 229 #define Rx_IgnoreCRC           0x00000040 /* 1:Ignore CRC Value              */
 230 #define Rx_StripCRC            0x00000010 /* 1:Strip CRC Value               */
 231 #define Rx_ShortEn             0x00000008 /* 1:Short Enable                  */
 232 #define Rx_LongEn              0x00000004 /* 1:Long Enable                   */
 233 #define Rx_RxHalt              0x00000002 /* 1:Receive Halt Request          */
 234 #define Rx_RxEn                0x00000001 /* 1:Receive Intrrupt Enable       */
 235
 236 /* Rx_Stat bit asign ------------------------------------------------------- */
 237 #define Rx_Halted              0x00008000 /* Rx Halted                       */
 238 #define Rx_Good                0x00004000 /* Rx Good                         */
 239 #define Rx_RxPar               0x00002000 /* Rx Parity Error                 */
 240                             /* 0x00001000    not use                         */
 241 #define Rx_LongErr             0x00000800 /* Rx Long Error                   */
 242 #define Rx_Over                0x00000400 /* Rx Overflow                     */
 243 #define Rx_CRCErr              0x00000200 /* Rx CRC Error                    */
 244 #define Rx_Align               0x00000100 /* Rx Alignment Error              */
 245 #define Rx_10Stat              0x00000080 /* Rx 10Mbps Status                */
 246 #define Rx_IntRx               0x00000040 /* Rx Interrupt                    */
 247 #define Rx_CtlRecd             0x00000020 /* Rx Control Receive              */
 248
 249 #define Rx_Stat_Mask           0x0000EFC0 /* Rx All Status Mask              */
 250
 251 /* Int_En bit asign -------------------------------------------------------- */
 252 #define Int_NRAbtEn            0x00000800 /* 1:Non-recoverable Abort Enable  */
 253 #define Int_TxCtlCmpEn         0x00000400 /* 1:Transmit Control Complete Enable */
 254 #define Int_DmParErrEn         0x00000200 /* 1:DMA Parity Error Enable       */
 255 #define Int_DParDEn            0x00000100 /* 1:Data Parity Error Enable      */
 256 #define Int_EarNotEn           0x00000080 /* 1:Early Notify Enable           */
 257 #define Int_DParErrEn          0x00000040 /* 1:Detected Parity Error Enable  */
 258 #define Int_SSysErrEn          0x00000020 /* 1:Signalled System Error Enable */
 259 #define Int_RMasAbtEn          0x00000010 /* 1:Received Master Abort Enable  */
 260 #define Int_RTargAbtEn         0x00000008 /* 1:Received Target Abort Enable  */
 261 #define Int_STargAbtEn         0x00000004 /* 1:Signalled Target Abort Enable */
 262 #define Int_BLExEn             0x00000002 /* 1:Buffer List Exhausted Enable  */
 263 #define Int_FDAExEn            0x00000001 /* 1:Free Descriptor Area          */
 264                                           /*               Exhausted Enable  */
 265
 266 /* Int_Src bit asign ------------------------------------------------------- */
 267 #define Int_NRabt              0x00004000 /* 1:Non Recoverable error         */
 268 #define Int_DmParErrStat       0x00002000 /* 1:DMA Parity Error & Clear      */
 269 #define Int_BLEx               0x00001000 /* 1:Buffer List Empty & Clear     */
 270 #define Int_FDAEx              0x00000800 /* 1:FDA Empty & Clear             */
 271 #define Int_IntNRAbt           0x00000400 /* 1:Non Recoverable Abort         */
 272 #define Int_IntCmp             0x00000200 /* 1:MAC control packet complete   */
 273 #define Int_IntExBD            0x00000100 /* 1:Interrupt Extra BD & Clear    */
 274 #define Int_DmParErr           0x00000080 /* 1:DMA Parity Error & Clear      */
 275 #define Int_IntEarNot          0x00000040 /* 1:Receive Data write & Clear    */
 276 #define Int_SWInt              0x00000020 /* 1:Software request & Clear      */
 277 #define Int_IntBLEx            0x00000010 /* 1:Buffer List Empty & Clear     */
 278 #define Int_IntFDAEx           0x00000008 /* 1:FDA Empty & Clear             */
 279 #define Int_IntPCI             0x00000004 /* 1:PCI controller & Clear        */
 280 #define Int_IntMacRx           0x00000002 /* 1:Rx controller & Clear         */
 281 #define Int_IntMacTx           0x00000001 /* 1:Tx controller & Clear         */
 282
 283 /* MD_CA bit asign --------------------------------------------------------- */
 284 #define MD_CA_PreSup           0x00001000 /* 1:Preamble Supress              */
 285 #define MD_CA_Busy             0x00000800 /* 1:Busy (Start Operation)        */
 286 #define MD_CA_Wr               0x00000400 /* 1:Write 0:Read                  */
 287
 288
 289 /*
 290  * Descriptors
 291  */
 292
 293 /* Frame descripter */
 294 struct FDesc {
 295         volatile __u32 FDNext;
 296         volatile __u32 FDSystem;
 297         volatile __u32 FDStat;
 298         volatile __u32 FDCtl;
 299 };
 300
 301 /* Buffer descripter */
 302 struct BDesc {
 303         volatile __u32 BuffData;
 304         volatile __u32 BDCtl;
 305 };
 306
 307 #define FD_ALIGN        16
 308
 309 /* Frame Descripter bit asign ---------------------------------------------- */
 310 #define FD_FDLength_MASK       0x0000FFFF /* Length MASK                     */
 311 #define FD_BDCnt_MASK          0x001F0000 /* BD count MASK in FD             */
 312 #define FD_FrmOpt_MASK         0x7C000000 /* Frame option MASK               */
 313 #define FD_FrmOpt_BigEndian    0x40000000 /* Tx/Rx */
 314 #define FD_FrmOpt_IntTx        0x20000000 /* Tx only */
 315 #define FD_FrmOpt_NoCRC        0x10000000 /* Tx only */
 316 #define FD_FrmOpt_NoPadding    0x08000000 /* Tx only */
 317 #define FD_FrmOpt_Packing      0x04000000 /* Rx only */
 318 #define FD_CownsFD             0x80000000 /* FD Controller owner bit         */
 319 #define FD_Next_EOL            0x00000001 /* FD EOL indicator                */
 320 #define FD_BDCnt_SHIFT         16
 321
 322 /* Buffer Descripter bit asign --------------------------------------------- */
 323 #define BD_BuffLength_MASK     0x0000FFFF /* Recieve Data Size               */
 324 #define BD_RxBDID_MASK         0x00FF0000 /* BD ID Number MASK               */
 325 #define BD_RxBDSeqN_MASK       0x7F000000 /* Rx BD Sequence Number           */
 326 #define BD_CownsBD             0x80000000 /* BD Controller owner bit         */
 327 #define BD_RxBDID_SHIFT        16
 328 #define BD_RxBDSeqN_SHIFT      24
 329
 330
 331 /* Some useful constants. */
 332 #undef NO_CHECK_CARRIER /* Does not check No-Carrier with TP */
 333
 334 #ifdef NO_CHECK_CARRIER
 335 #define TX_CTL_CMD      (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
 336         Tx_EnExColl | Tx_EnExDefer | Tx_EnUnder | \
 337         Tx_En)  /* maybe  0x7b01 */
 338 #else
 339 #define TX_CTL_CMD      (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
 340         Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
 341         Tx_En)  /* maybe  0x7b01 */
 342 #endif
 343 #define RX_CTL_CMD      (Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
 344         | Rx_EnCRCErr | Rx_EnAlign | Rx_RxEn)   /* maybe 0x6f01 */
 345 #define INT_EN_CMD  (Int_NRAbtEn | \
 346         Int_DmParErrEn | Int_DParDEn | Int_DParErrEn | \
 347         Int_SSysErrEn  | Int_RMasAbtEn | Int_RTargAbtEn | \
 348         Int_STargAbtEn | \
 349         Int_BLExEn  | Int_FDAExEn) /* maybe 0xb7f*/
 350 #define DMA_CTL_CMD     DMA_BURST_SIZE
 351 #define HAVE_DMA_RXALIGN(lp)    likely((lp)->boardtype != TC35815CF)
 352
 353 /* Tuning parameters */
 354 #define DMA_BURST_SIZE  32
 355 #define TX_THRESHOLD    1024
 356 #define TX_THRESHOLD_MAX 1536       /* used threshold with packet max byte for low pci transfer ability.*/
 357 #define TX_THRESHOLD_KEEP_LIMIT 10  /* setting threshold max value when overrun error occured this count. */
 358
 359 /* 16 + RX_BUF_NUM * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*FD_PAGE_NUM */
 360 #ifdef TC35815_USE_PACKEDBUFFER
 361 #define FD_PAGE_NUM 2
 362 #define RX_BUF_NUM      8       /* >= 2 */
 363 #define RX_FD_NUM       250     /* >= 32 */
 364 #define TX_FD_NUM       128
 365 #define RX_BUF_SIZE     PAGE_SIZE
 366 #else /* TC35815_USE_PACKEDBUFFER */
 367 #define FD_PAGE_NUM 4
 368 #define RX_BUF_NUM      128     /* < 256 */
 369 #define RX_FD_NUM       256     /* >= 32 */
 370 #define TX_FD_NUM       128
 371 #if RX_CTL_CMD & Rx_LongEn
 372 #define RX_BUF_SIZE     PAGE_SIZE
 373 #elif RX_CTL_CMD & Rx_StripCRC
 374 #define RX_BUF_SIZE     ALIGN(ETH_FRAME_LEN + 4 + 2, 32) /* +2: reserve */
 375 #else
 376 #define RX_BUF_SIZE     ALIGN(ETH_FRAME_LEN + 2, 32) /* +2: reserve */
 377 #endif
 378 #endif /* TC35815_USE_PACKEDBUFFER */
 379 #define RX_FD_RESERVE   (2 / 2) /* max 2 BD per RxFD */
 380 #define NAPI_WEIGHT     16
 381
 382 struct TxFD {
 383         struct FDesc fd;
 384         struct BDesc bd;
 385         struct BDesc unused;
 386 };
 387
 388 struct RxFD {
 389         struct FDesc fd;
 390         struct BDesc bd[0];     /* variable length */
 391 };
 392
 393 struct FrFD {
 394         struct FDesc fd;
 395         struct BDesc bd[RX_BUF_NUM];
 396 };
 397
 398
 399 #define tc_readl(addr)  readl(addr)
 400 #define tc_writel(d, addr)      writel(d, addr)
 401
 402 #define TC35815_TX_TIMEOUT  msecs_to_jiffies(400)
 403
 404 /* Timer state engine. */
 405 enum tc35815_timer_state {
 406         arbwait  = 0,   /* Waiting for auto negotiation to complete.          */
 407         lupwait  = 1,   /* Auto-neg complete, awaiting link-up status.        */
 408         ltrywait = 2,   /* Forcing try of all modes, from fastest to slowest. */
 409         asleep   = 3,   /* Time inactive.                                     */
 410         lcheck   = 4,   /* Check link status.                                 */
 411 };
 412
 413 /* Information that need to be kept for each board. */
 414 struct tc35815_local {
 415         struct pci_dev *pci_dev;
 416
 417         /* statistics */
 418         struct net_device_stats stats;
 419         struct {
 420                 int max_tx_qlen;
 421                 int tx_ints;
 422                 int rx_ints;
 423                 int tx_underrun;
 424         } lstats;
 425
 426         /* Tx control lock.  This protects the transmit buffer ring
 427          * state along with the "tx full" state of the driver.  This
 428          * means all netif_queue flow control actions are protected
 429          * by this lock as well.
 430          */
 431         spinlock_t lock;
 432
 433         int phy_addr;
 434         int fullduplex;
 435         unsigned short saved_lpa;
 436         struct timer_list timer;
 437         enum tc35815_timer_state timer_state; /* State of auto-neg timer. */
 438         unsigned int timer_ticks;       /* Number of clicks at each state  */
 439
 440         /*
 441          * Transmitting: Batch Mode.
 442          *      1 BD in 1 TxFD.
 443          * Receiving: Packing Mode. (TC35815_USE_PACKEDBUFFER)
 444          *      1 circular FD for Free Buffer List.
 445          *      RX_BUF_NUM BD in Free Buffer FD.
 446          *      One Free Buffer BD has PAGE_SIZE data buffer.
 447          * Or Non-Packing Mode.
 448          *      1 circular FD for Free Buffer List.
 449          *      RX_BUF_NUM BD in Free Buffer FD.
 450          *      One Free Buffer BD has ETH_FRAME_LEN data buffer.
 451          */
 452         void * fd_buf;  /* for TxFD, RxFD, FrFD */
 453         dma_addr_t fd_buf_dma;
 454         struct TxFD *tfd_base;
 455         unsigned int tfd_start;
 456         unsigned int tfd_end;
 457         struct RxFD *rfd_base;
 458         struct RxFD *rfd_limit;
 459         struct RxFD *rfd_cur;
 460         struct FrFD *fbl_ptr;
 461 #ifdef TC35815_USE_PACKEDBUFFER
 462         unsigned char fbl_curid;
 463         void * data_buf[RX_BUF_NUM];            /* packing */
 464         dma_addr_t data_buf_dma[RX_BUF_NUM];
 465         struct {
 466                 struct sk_buff *skb;
 467                 dma_addr_t skb_dma;
 468         } tx_skbs[TX_FD_NUM];
 469 #else
 470         unsigned int fbl_count;
 471         struct {
 472                 struct sk_buff *skb;
 473                 dma_addr_t skb_dma;
 474         } tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
 475 #endif
 476         struct mii_if_info mii;
 477         unsigned short mii_id[2];
 478         u32 msg_enable;
 479         board_t boardtype;
 480 };
 481
 482 static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
 483 {
 484         return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
 485 }
 486 #ifdef DEBUG
 487 static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
 488 {
 489         return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
 490 }
 491 #endif
 492 #ifdef TC35815_USE_PACKEDBUFFER
 493 static inline void *rxbuf_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
 494 {
 495         int i;
 496         for (i = 0; i < RX_BUF_NUM; i++) {
 497                 if (bus >= lp->data_buf_dma[i] &&
 498                     bus < lp->data_buf_dma[i] + PAGE_SIZE)
 499                         return (void *)((u8 *)lp->data_buf[i] +
 500                                         (bus - lp->data_buf_dma[i]));
 501         }
 502         return NULL;
 503 }
 504
 505 #define TC35815_DMA_SYNC_ONDEMAND
 506 static void* alloc_rxbuf_page(struct pci_dev *hwdev, dma_addr_t *dma_handle)
 507 {
 508 #ifdef TC35815_DMA_SYNC_ONDEMAND
 509         void *buf;
 510         /* pci_map + pci_dma_sync will be more effective than
 511          * pci_alloc_consistent on some archs. */
 512         if ((buf = (void *)__get_free_page(GFP_ATOMIC)) == NULL)
 513                 return NULL;
 514         *dma_handle = pci_map_single(hwdev, buf, PAGE_SIZE,
 515                                      PCI_DMA_FROMDEVICE);
 516         if (pci_dma_mapping_error(*dma_handle)) {
 517                 free_page((unsigned long)buf);
 518                 return NULL;
 519         }
 520         return buf;
 521 #else
 522         return pci_alloc_consistent(hwdev, PAGE_SIZE, dma_handle);
 523 #endif
 524 }
 525
 526 static void free_rxbuf_page(struct pci_dev *hwdev, void *buf, dma_addr_t dma_handle)
 527 {
 528 #ifdef TC35815_DMA_SYNC_ONDEMAND
 529         pci_unmap_single(hwdev, dma_handle, PAGE_SIZE, PCI_DMA_FROMDEVICE);
 530         free_page((unsigned long)buf);
 531 #else
 532         pci_free_consistent(hwdev, PAGE_SIZE, buf, dma_handle);
 533 #endif
 534 }
 535 #else /* TC35815_USE_PACKEDBUFFER */
 536 static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
 537                                        struct pci_dev *hwdev,
 538                                        dma_addr_t *dma_handle)
 539 {
 540         struct sk_buff *skb;
 541         skb = dev_alloc_skb(RX_BUF_SIZE);
 542         if (!skb)
 543                 return NULL;
 544         *dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
 545                                      PCI_DMA_FROMDEVICE);
 546         if (pci_dma_mapping_error(*dma_handle)) {
 547                 dev_kfree_skb_any(skb);
 548                 return NULL;
 549         }
 550         skb_reserve(skb, 2);    /* make IP header 4byte aligned */
 551         return skb;
 552 }
 553
 554 static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
 555 {
 556         pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
 557                          PCI_DMA_FROMDEVICE);
 558         dev_kfree_skb_any(skb);
 559 }
 560 #endif /* TC35815_USE_PACKEDBUFFER */
 561
 562 /* Index to functions, as function prototypes. */
 563
 564 static int      tc35815_open(struct net_device *dev);
 565 static int      tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
 566 static irqreturn_t      tc35815_interrupt(int irq, void *dev_id);
 567 #ifdef TC35815_NAPI
 568 static int      tc35815_rx(struct net_device *dev, int limit);
 569 static int      tc35815_poll(struct net_device *dev, int *budget);
 570 #else
 571 static void     tc35815_rx(struct net_device *dev);
 572 #endif
 573 static void     tc35815_txdone(struct net_device *dev);
 574 static int      tc35815_close(struct net_device *dev);
 575 static struct   net_device_stats *tc35815_get_stats(struct net_device *dev);
 576 static void     tc35815_set_multicast_list(struct net_device *dev);
 577 static void     tc35815_tx_timeout(struct net_device *dev);
 578 static int      tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 579 #ifdef CONFIG_NET_POLL_CONTROLLER
 580 static void     tc35815_poll_controller(struct net_device *dev);
 581 #endif
 582 static const struct ethtool_ops tc35815_ethtool_ops;
 583
 584 /* Example routines you must write ;->. */
 585 static void     tc35815_chip_reset(struct net_device *dev);
 586 static void     tc35815_chip_init(struct net_device *dev);
 587 static void     tc35815_find_phy(struct net_device *dev);
 588 static void     tc35815_phy_chip_init(struct net_device *dev);
 589
 590 #ifdef DEBUG
 591 static void     panic_queues(struct net_device *dev);
 592 #endif
 593
 594 static void tc35815_timer(unsigned long data);
 595 static void tc35815_start_auto_negotiation(struct net_device *dev,
 596                                            struct ethtool_cmd *ep);
 597 static int tc_mdio_read(struct net_device *dev, int phy_id, int location);
 598 static void tc_mdio_write(struct net_device *dev, int phy_id, int location,
 599                           int val);
 600
 601 #ifdef CONFIG_CPU_TX49XX
 602 /*
 603  * Find a platform_device providing a MAC address.  The platform code
 604  * should provide a "tc35815-mac" device with a MAC address in its
 605  * platform_data.
 606  */
 607 static int __devinit tc35815_mac_match(struct device *dev, void *data)
 608 {
 609         struct platform_device *plat_dev = to_platform_device(dev);
 610         struct pci_dev *pci_dev = data;
 611         unsigned int id = (pci_dev->bus->number << 8) | pci_dev->devfn;
 612         return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
 613 }
 614
 615 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
 616 {
 617         struct tc35815_local *lp = dev->priv;
 618         struct device *pd = bus_find_device(&platform_bus_type, NULL,
 619                                             lp->pci_dev, tc35815_mac_match);
 620         if (pd) {
 621                 if (pd->platform_data)
 622                         memcpy(dev->dev_addr, pd->platform_data, ETH_ALEN);
 623                 put_device(pd);
 624                 return is_valid_ether_addr(dev->dev_addr) ? 0 : -ENODEV;
 625         }
 626         return -ENODEV;
 627 }
 628 #else
 629 static int __devinit tc35815_read_plat_dev_addr(struct device *dev)
 630 {
 631         return -ENODEV;
 632 }
 633 #endif
 634
 635 static int __devinit tc35815_init_dev_addr (struct net_device *dev)
 636 {
 637         struct tc35815_regs __iomem *tr =
 638                 (struct tc35815_regs __iomem *)dev->base_addr;
 639         int i;
 640
 641         while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 642                 ;
 643         for (i = 0; i < 6; i += 2) {
 644                 unsigned short data;
 645                 tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
 646                 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 647                         ;
 648                 data = tc_readl(&tr->PROM_Data);
 649                 dev->dev_addr[i] = data & 0xff;
 650                 dev->dev_addr[i+1] = data >> 8;
 651         }
 652         if (!is_valid_ether_addr(dev->dev_addr))
 653                 return tc35815_read_plat_dev_addr(dev);
 654         return 0;
 655 }
 656
 657 static int __devinit tc35815_init_one (struct pci_dev *pdev,
 658                                        const struct pci_device_id *ent)
 659 {
 660         void __iomem *ioaddr = NULL;
 661         struct net_device *dev;
 662         struct tc35815_local *lp;
 663         int rc;
 664         unsigned long mmio_start, mmio_end, mmio_flags, mmio_len;
 665
 666         static int printed_version;
 667         if (!printed_version++) {
 668                 printk(version);
 669                 dev_printk(KERN_DEBUG, &pdev->dev,
 670                            "speed:%d duplex:%d doforce:%d\n",
 671                            options.speed, options.duplex, options.doforce);
 672         }
 673
 674         if (!pdev->irq) {
 675                 dev_warn(&pdev->dev, "no IRQ assigned.\n");
 676                 return -ENODEV;
 677         }
 678
 679         /* dev zeroed in alloc_etherdev */
 680         dev = alloc_etherdev (sizeof (*lp));
 681         if (dev == NULL) {
 682                 dev_err(&pdev->dev, "unable to alloc new ethernet\n");
 683                 return -ENOMEM;
 684         }
 685         SET_MODULE_OWNER(dev);
 686         SET_NETDEV_DEV(dev, &pdev->dev);
 687         lp = dev->priv;
 688
 689         /* enable device (incl. PCI PM wakeup), and bus-mastering */
 690         rc = pci_enable_device (pdev);
 691         if (rc)
 692                 goto err_out;
 693
 694         mmio_start = pci_resource_start (pdev, 1);
 695         mmio_end = pci_resource_end (pdev, 1);
 696         mmio_flags = pci_resource_flags (pdev, 1);
 697         mmio_len = pci_resource_len (pdev, 1);
 698
 699         /* set this immediately, we need to know before
 700          * we talk to the chip directly */
 701
 702         /* make sure PCI base addr 1 is MMIO */
 703         if (!(mmio_flags & IORESOURCE_MEM)) {
 704                 dev_err(&pdev->dev, "region #1 not an MMIO resource, aborting\n");
 705                 rc = -ENODEV;
 706                 goto err_out;
 707         }
 708
 709         /* check for weird/broken PCI region reporting */
 710         if ((mmio_len < sizeof(struct tc35815_regs))) {
 711                 dev_err(&pdev->dev, "Invalid PCI region size(s), aborting\n");
 712                 rc = -ENODEV;
 713                 goto err_out;
 714         }
 715
 716         rc = pci_request_regions (pdev, MODNAME);
 717         if (rc)
 718                 goto err_out;
 719
 720         pci_set_master (pdev);
 721
 722         /* ioremap MMIO region */
 723         ioaddr = ioremap (mmio_start, mmio_len);
 724         if (ioaddr == NULL) {
 725                 dev_err(&pdev->dev, "cannot remap MMIO, aborting\n");
 726                 rc = -EIO;
 727                 goto err_out_free_res;
 728         }
 729
 730         /* Initialize the device structure. */
 731         dev->open = tc35815_open;
 732         dev->hard_start_xmit = tc35815_send_packet;
 733         dev->stop = tc35815_close;
 734         dev->get_stats = tc35815_get_stats;
 735         dev->set_multicast_list = tc35815_set_multicast_list;
 736         dev->do_ioctl = tc35815_ioctl;
 737         dev->ethtool_ops = &tc35815_ethtool_ops;
 738         dev->tx_timeout = tc35815_tx_timeout;
 739         dev->watchdog_timeo = TC35815_TX_TIMEOUT;
 740 #ifdef TC35815_NAPI
 741         dev->poll = tc35815_poll;
 742         dev->weight = NAPI_WEIGHT;
 743 #endif
 744 #ifdef CONFIG_NET_POLL_CONTROLLER
 745         dev->poll_controller = tc35815_poll_controller;
 746 #endif
 747
 748         dev->irq = pdev->irq;
 749         dev->base_addr = (unsigned long) ioaddr;
 750
 751         /* dev->priv/lp zeroed and aligned in alloc_etherdev */
 752         lp = dev->priv;
 753         spin_lock_init(&lp->lock);
 754         lp->pci_dev = pdev;
 755         lp->boardtype = ent->driver_data;
 756
 757         lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
 758         pci_set_drvdata(pdev, dev);
 759
 760         /* Soft reset the chip. */
 761         tc35815_chip_reset(dev);
 762
 763         /* Retrieve the ethernet address. */
 764         if (tc35815_init_dev_addr(dev)) {
 765                 dev_warn(&pdev->dev, "not valid ether addr\n");
 766                 random_ether_addr(dev->dev_addr);
 767         }
 768
 769         rc = register_netdev (dev);
 770         if (rc)
 771                 goto err_out_unmap;
 772
 773         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
 774         printk(KERN_INFO "%s: %s at 0x%lx, "
 775                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
 776                 "IRQ %d\n",
 777                 dev->name,
 778                 board_info[ent->driver_data].name,
 779                 dev->base_addr,
 780                 dev->dev_addr[0], dev->dev_addr[1],
 781                 dev->dev_addr[2], dev->dev_addr[3],
 782                 dev->dev_addr[4], dev->dev_addr[5],
 783                 dev->irq);
 784
 785         setup_timer(&lp->timer, tc35815_timer, (unsigned long) dev);
 786         lp->mii.dev = dev;
 787         lp->mii.mdio_read = tc_mdio_read;
 788         lp->mii.mdio_write = tc_mdio_write;
 789         lp->mii.phy_id_mask = 0x1f;
 790         lp->mii.reg_num_mask = 0x1f;
 791         tc35815_find_phy(dev);
 792         lp->mii.phy_id = lp->phy_addr;
 793         lp->mii.full_duplex = 0;
 794         lp->mii.force_media = 0;
 795
 796         return 0;
 797
 798 err_out_unmap:
 799         iounmap(ioaddr);
 800 err_out_free_res:
 801         pci_release_regions (pdev);
 802 err_out:
 803         free_netdev (dev);
 804         return rc;
 805 }
 806
 807
 808 static void __devexit tc35815_remove_one (struct pci_dev *pdev)
 809 {
 810         struct net_device *dev = pci_get_drvdata (pdev);
 811         unsigned long mmio_addr;
 812
 813         mmio_addr = dev->base_addr;
 814
 815         unregister_netdev (dev);
 816
 817         if (mmio_addr) {
 818                 iounmap ((void __iomem *)mmio_addr);
 819                 pci_release_regions (pdev);
 820         }
 821
 822         free_netdev (dev);
 823
 824         pci_set_drvdata (pdev, NULL);
 825 }
 826
 827 static int
 828 tc35815_init_queues(struct net_device *dev)
 829 {
 830         struct tc35815_local *lp = dev->priv;
 831         int i;
 832         unsigned long fd_addr;
 833
 834         if (!lp->fd_buf) {
 835                 BUG_ON(sizeof(struct FDesc) +
 836                        sizeof(struct BDesc) * RX_BUF_NUM +
 837                        sizeof(struct FDesc) * RX_FD_NUM +
 838                        sizeof(struct TxFD) * TX_FD_NUM >
 839                        PAGE_SIZE * FD_PAGE_NUM);
 840
 841                 if ((lp->fd_buf = pci_alloc_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM, &lp->fd_buf_dma)) == 0)
 842                         return -ENOMEM;
 843                 for (i = 0; i < RX_BUF_NUM; i++) {
 844 #ifdef TC35815_USE_PACKEDBUFFER
 845                         if ((lp->data_buf[i] = alloc_rxbuf_page(lp->pci_dev, &lp->data_buf_dma[i])) == NULL) {
 846                                 while (--i >= 0) {
 847                                         free_rxbuf_page(lp->pci_dev,
 848                                                         lp->data_buf[i],
 849                                                         lp->data_buf_dma[i]);
 850                                         lp->data_buf[i] = NULL;
 851                                 }
 852                                 pci_free_consistent(lp->pci_dev,
 853                                                     PAGE_SIZE * FD_PAGE_NUM,
 854                                                     lp->fd_buf,
 855                                                     lp->fd_buf_dma);
 856                                 lp->fd_buf = NULL;
 857                                 return -ENOMEM;
 858                         }
 859 #else
 860                         lp->rx_skbs[i].skb =
 861                                 alloc_rxbuf_skb(dev, lp->pci_dev,
 862                                                 &lp->rx_skbs[i].skb_dma);
 863                         if (!lp->rx_skbs[i].skb) {
 864                                 while (--i >= 0) {
 865                                         free_rxbuf_skb(lp->pci_dev,
 866                                                        lp->rx_skbs[i].skb,
 867                                                        lp->rx_skbs[i].skb_dma);
 868                                         lp->rx_skbs[i].skb = NULL;
 869                                 }
 870                                 pci_free_consistent(lp->pci_dev,
 871                                                     PAGE_SIZE * FD_PAGE_NUM,
 872                                                     lp->fd_buf,
 873                                                     lp->fd_buf_dma);
 874                                 lp->fd_buf = NULL;
 875                                 return -ENOMEM;
 876                         }
 877 #endif
 878                 }
 879                 printk(KERN_DEBUG "%s: FD buf %p DataBuf",
 880                        dev->name, lp->fd_buf);
 881 #ifdef TC35815_USE_PACKEDBUFFER
 882                 printk(" DataBuf");
 883                 for (i = 0; i < RX_BUF_NUM; i++)
 884                         printk(" %p", lp->data_buf[i]);
 885 #endif
 886                 printk("\n");
 887         } else {
 888                 for (i = 0; i < FD_PAGE_NUM; i++) {
 889                         clear_page((void *)((unsigned long)lp->fd_buf + i * PAGE_SIZE));
 890                 }
 891         }
 892         fd_addr = (unsigned long)lp->fd_buf;
 893
 894         /* Free Descriptors (for Receive) */
 895         lp->rfd_base = (struct RxFD *)fd_addr;
 896         fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
 897         for (i = 0; i < RX_FD_NUM; i++) {
 898                 lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
 899         }
 900         lp->rfd_cur = lp->rfd_base;
 901         lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
 902
 903         /* Transmit Descriptors */
 904         lp->tfd_base = (struct TxFD *)fd_addr;
 905         fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
 906         for (i = 0; i < TX_FD_NUM; i++) {
 907                 lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
 908                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 909                 lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
 910         }
 911         lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
 912         lp->tfd_start = 0;
 913         lp->tfd_end = 0;
 914
 915         /* Buffer List (for Receive) */
 916         lp->fbl_ptr = (struct FrFD *)fd_addr;
 917         lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
 918         lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
 919 #ifndef TC35815_USE_PACKEDBUFFER
 920         /*
 921          * move all allocated skbs to head of rx_skbs[] array.
 922          * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
 923          * tc35815_rx() had failed.
 924          */
 925         lp->fbl_count = 0;
 926         for (i = 0; i < RX_BUF_NUM; i++) {
 927                 if (lp->rx_skbs[i].skb) {
 928                         if (i != lp->fbl_count) {
 929                                 lp->rx_skbs[lp->fbl_count].skb =
 930                                         lp->rx_skbs[i].skb;
 931                                 lp->rx_skbs[lp->fbl_count].skb_dma =
 932                                         lp->rx_skbs[i].skb_dma;
 933                         }
 934                         lp->fbl_count++;
 935                 }
 936         }
 937 #endif
 938         for (i = 0; i < RX_BUF_NUM; i++) {
 939 #ifdef TC35815_USE_PACKEDBUFFER
 940                 lp->fbl_ptr->bd[i].BuffData = cpu_to_le32(lp->data_buf_dma[i]);
 941 #else
 942                 if (i >= lp->fbl_count) {
 943                         lp->fbl_ptr->bd[i].BuffData = 0;
 944                         lp->fbl_ptr->bd[i].BDCtl = 0;
 945                         continue;
 946                 }
 947                 lp->fbl_ptr->bd[i].BuffData =
 948                         cpu_to_le32(lp->rx_skbs[i].skb_dma);
 949 #endif
 950                 /* BDID is index of FrFD.bd[] */
 951                 lp->fbl_ptr->bd[i].BDCtl =
 952                         cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
 953                                     RX_BUF_SIZE);
 954         }
 955 #ifdef TC35815_USE_PACKEDBUFFER
 956         lp->fbl_curid = 0;
 957 #endif
 958
 959         printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
 960                dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
 961         return 0;
 962 }
 963
 964 static void
 965 tc35815_clear_queues(struct net_device *dev)
 966 {
 967         struct tc35815_local *lp = dev->priv;
 968         int i;
 969
 970         for (i = 0; i < TX_FD_NUM; i++) {
 971                 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
 972                 struct sk_buff *skb =
 973                         fdsystem != 0xffffffff ?
 974                         lp->tx_skbs[fdsystem].skb : NULL;
 975 #ifdef DEBUG
 976                 if (lp->tx_skbs[i].skb != skb) {
 977                         printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
 978                         panic_queues(dev);
 979                 }
 980 #else
 981                 BUG_ON(lp->tx_skbs[i].skb != skb);
 982 #endif
 983                 if (skb) {
 984                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
 985                         lp->tx_skbs[i].skb = NULL;
 986                         lp->tx_skbs[i].skb_dma = 0;
 987                         dev_kfree_skb_any(skb);
 988                 }
 989                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
 990         }
 991
 992         tc35815_init_queues(dev);
 993 }
 994
 995 static void
 996 tc35815_free_queues(struct net_device *dev)
 997 {
 998         struct tc35815_local *lp = dev->priv;
 999         int i;
1000
1001         if (lp->tfd_base) {
1002                 for (i = 0; i < TX_FD_NUM; i++) {
1003                         u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1004                         struct sk_buff *skb =
1005                                 fdsystem != 0xffffffff ?
1006                                 lp->tx_skbs[fdsystem].skb : NULL;
1007 #ifdef DEBUG
1008                         if (lp->tx_skbs[i].skb != skb) {
1009                                 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1010                                 panic_queues(dev);
1011                         }
1012 #else
1013                         BUG_ON(lp->tx_skbs[i].skb != skb);
1014 #endif
1015                         if (skb) {
1016                                 dev_kfree_skb(skb);
1017                                 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1018                                 lp->tx_skbs[i].skb = NULL;
1019                                 lp->tx_skbs[i].skb_dma = 0;
1020                         }
1021                         lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1022                 }
1023         }
1024
1025         lp->rfd_base = NULL;
1026         lp->rfd_limit = NULL;
1027         lp->rfd_cur = NULL;
1028         lp->fbl_ptr = NULL;
1029
1030         for (i = 0; i < RX_BUF_NUM; i++) {
1031 #ifdef TC35815_USE_PACKEDBUFFER
1032                 if (lp->data_buf[i]) {
1033                         free_rxbuf_page(lp->pci_dev,
1034                                         lp->data_buf[i], lp->data_buf_dma[i]);
1035                         lp->data_buf[i] = NULL;
1036                 }
1037 #else
1038                 if (lp->rx_skbs[i].skb) {
1039                         free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
1040                                        lp->rx_skbs[i].skb_dma);
1041                         lp->rx_skbs[i].skb = NULL;
1042                 }
1043 #endif
1044         }
1045         if (lp->fd_buf) {
1046                 pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
1047                                     lp->fd_buf, lp->fd_buf_dma);
1048                 lp->fd_buf = NULL;
1049         }
1050 }
1051
1052 static void
1053 dump_txfd(struct TxFD *fd)
1054 {
1055         printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
1056                le32_to_cpu(fd->fd.FDNext),
1057                le32_to_cpu(fd->fd.FDSystem),
1058                le32_to_cpu(fd->fd.FDStat),
1059                le32_to_cpu(fd->fd.FDCtl));
1060         printk("BD: ");
1061         printk(" %08x %08x",
1062                le32_to_cpu(fd->bd.BuffData),
1063                le32_to_cpu(fd->bd.BDCtl));
1064         printk("\n");
1065 }
1066
1067 static int
1068 dump_rxfd(struct RxFD *fd)
1069 {
1070         int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1071         if (bd_count > 8)
1072                 bd_count = 8;
1073         printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
1074                le32_to_cpu(fd->fd.FDNext),
1075                le32_to_cpu(fd->fd.FDSystem),
1076                le32_to_cpu(fd->fd.FDStat),
1077                le32_to_cpu(fd->fd.FDCtl));
1078         if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
1079             return 0;
1080         printk("BD: ");
1081         for (i = 0; i < bd_count; i++)
1082                 printk(" %08x %08x",
1083                        le32_to_cpu(fd->bd[i].BuffData),
1084                        le32_to_cpu(fd->bd[i].BDCtl));
1085         printk("\n");
1086         return bd_count;
1087 }
1088
1089 #if defined(DEBUG) || defined(TC35815_USE_PACKEDBUFFER)
1090 static void
1091 dump_frfd(struct FrFD *fd)
1092 {
1093         int i;
1094         printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
1095                le32_to_cpu(fd->fd.FDNext),
1096                le32_to_cpu(fd->fd.FDSystem),
1097                le32_to_cpu(fd->fd.FDStat),
1098                le32_to_cpu(fd->fd.FDCtl));
1099         printk("BD: ");
1100         for (i = 0; i < RX_BUF_NUM; i++)
1101                 printk(" %08x %08x",
1102                        le32_to_cpu(fd->bd[i].BuffData),
1103                        le32_to_cpu(fd->bd[i].BDCtl));
1104         printk("\n");
1105 }
1106 #endif
1107
1108 #ifdef DEBUG
1109 static void
1110 panic_queues(struct net_device *dev)
1111 {
1112         struct tc35815_local *lp = dev->priv;
1113         int i;
1114
1115         printk("TxFD base %p, start %u, end %u\n",
1116                lp->tfd_base, lp->tfd_start, lp->tfd_end);
1117         printk("RxFD base %p limit %p cur %p\n",
1118                lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
1119         printk("FrFD %p\n", lp->fbl_ptr);
1120         for (i = 0; i < TX_FD_NUM; i++)
1121                 dump_txfd(&lp->tfd_base[i]);
1122         for (i = 0; i < RX_FD_NUM; i++) {
1123                 int bd_count = dump_rxfd(&lp->rfd_base[i]);
1124                 i += (bd_count + 1) / 2;        /* skip BDs */
1125         }
1126         dump_frfd(lp->fbl_ptr);
1127         panic("%s: Illegal queue state.", dev->name);
1128 }
1129 #endif
1130
1131 static void print_eth(char *add)
1132 {
1133         int i;
1134
1135         printk("print_eth(%p)\n", add);
1136         for (i = 0; i < 6; i++)
1137                 printk(" %2.2X", (unsigned char) add[i + 6]);
1138         printk(" =>");
1139         for (i = 0; i < 6; i++)
1140                 printk(" %2.2X", (unsigned char) add[i]);
1141         printk(" : %2.2X%2.2X\n", (unsigned char) add[12], (unsigned char) add[13]);
1142 }
1143
1144 static int tc35815_tx_full(struct net_device *dev)
1145 {
1146         struct tc35815_local *lp = dev->priv;
1147         return ((lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end);
1148 }
1149
1150 static void tc35815_restart(struct net_device *dev)
1151 {
1152         struct tc35815_local *lp = dev->priv;
1153         int pid = lp->phy_addr;
1154         int do_phy_reset = 1;
1155         del_timer(&lp->timer);          /* Kill if running      */
1156
1157         if (lp->mii_id[0] == 0x0016 && (lp->mii_id[1] & 0xfc00) == 0xf800) {
1158                 /* Resetting PHY cause problem on some chip... (SEEQ 80221) */
1159                 do_phy_reset = 0;
1160         }
1161         if (do_phy_reset) {
1162                 int timeout;
1163                 tc_mdio_write(dev, pid, MII_BMCR, BMCR_RESET);
1164                 timeout = 100;
1165                 while (--timeout) {
1166                         if (!(tc_mdio_read(dev, pid, MII_BMCR) & BMCR_RESET))
1167                                 break;
1168                         udelay(1);
1169                 }
1170                 if (!timeout)
1171                         printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
1172         }
1173
1174         tc35815_chip_reset(dev);
1175         tc35815_clear_queues(dev);
1176         tc35815_chip_init(dev);
1177         /* Reconfigure CAM again since tc35815_chip_init() initialize it. */
1178         tc35815_set_multicast_list(dev);
1179 }
1180
1181 static void tc35815_tx_timeout(struct net_device *dev)
1182 {
1183         struct tc35815_local *lp = dev->priv;
1184         struct tc35815_regs __iomem *tr =
1185                 (struct tc35815_regs __iomem *)dev->base_addr;
1186
1187         printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
1188                dev->name, tc_readl(&tr->Tx_Stat));
1189
1190         /* Try to restart the adaptor. */
1191         spin_lock_irq(&lp->lock);
1192         tc35815_restart(dev);
1193         spin_unlock_irq(&lp->lock);
1194
1195         lp->stats.tx_errors++;
1196
1197         /* If we have space available to accept new transmit
1198          * requests, wake up the queueing layer.  This would
1199          * be the case if the chipset_init() call above just
1200          * flushes out the tx queue and empties it.
1201          *
1202          * If instead, the tx queue is retained then the
1203          * netif_wake_queue() call should be placed in the
1204          * TX completion interrupt handler of the driver instead
1205          * of here.
1206          */
1207         if (!tc35815_tx_full(dev))
1208                 netif_wake_queue(dev);
1209 }
1210
1211 /*
1212  * Open/initialize the board. This is called (in the current kernel)
1213  * sometime after booting when the 'ifconfig' program is run.
1214  *
1215  * This routine should set everything up anew at each open, even
1216  * registers that "should" only need to be set once at boot, so that
1217  * there is non-reboot way to recover if something goes wrong.
1218  */
1219 static int
1220 tc35815_open(struct net_device *dev)
1221 {
1222         struct tc35815_local *lp = dev->priv;
1223
1224         /*
1225          * This is used if the interrupt line can turned off (shared).
1226          * See 3c503.c for an example of selecting the IRQ at config-time.
1227          */
1228         if (request_irq(dev->irq, &tc35815_interrupt, IRQF_SHARED, dev->name, dev)) {
1229                 return -EAGAIN;
1230         }
1231
1232         del_timer(&lp->timer);          /* Kill if running      */
1233         tc35815_chip_reset(dev);
1234
1235         if (tc35815_init_queues(dev) != 0) {
1236                 free_irq(dev->irq, dev);
1237                 return -EAGAIN;
1238         }
1239
1240         /* Reset the hardware here. Don't forget to set the station address. */
1241         spin_lock_irq(&lp->lock);
1242         tc35815_chip_init(dev);
1243         spin_unlock_irq(&lp->lock);
1244
1245         /* We are now ready to accept transmit requeusts from
1246          * the queueing layer of the networking.
1247          */
1248         netif_start_queue(dev);
1249
1250         return 0;
1251 }
1252
1253 /* This will only be invoked if your driver is _not_ in XOFF state.
1254  * What this means is that you need not check it, and that this
1255  * invariant will hold if you make sure that the netif_*_queue()
1256  * calls are done at the proper times.
1257  */
1258 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
1259 {
1260         struct tc35815_local *lp = dev->priv;
1261         struct TxFD *txfd;
1262         unsigned long flags;
1263
1264         /* If some error occurs while trying to transmit this
1265          * packet, you should return '1' from this function.
1266          * In such a case you _may not_ do anything to the
1267          * SKB, it is still owned by the network queueing
1268          * layer when an error is returned.  This means you
1269          * may not modify any SKB fields, you may not free
1270          * the SKB, etc.
1271          */
1272
1273         /* This is the most common case for modern hardware.
1274          * The spinlock protects this code from the TX complete
1275          * hardware interrupt handler.  Queue flow control is
1276          * thus managed under this lock as well.
1277          */
1278         spin_lock_irqsave(&lp->lock, flags);
1279
1280         /* failsafe... (handle txdone now if half of FDs are used) */
1281         if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
1282             TX_FD_NUM / 2)
1283                 tc35815_txdone(dev);
1284
1285         if (netif_msg_pktdata(lp))
1286                 print_eth(skb->data);
1287 #ifdef DEBUG
1288         if (lp->tx_skbs[lp->tfd_start].skb) {
1289                 printk("%s: tx_skbs conflict.\n", dev->name);
1290                 panic_queues(dev);
1291         }
1292 #else
1293         BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
1294 #endif
1295         lp->tx_skbs[lp->tfd_start].skb = skb;
1296         lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1297
1298         /*add to ring */
1299         txfd = &lp->tfd_base[lp->tfd_start];
1300         txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
1301         txfd->bd.BDCtl = cpu_to_le32(skb->len);
1302         txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
1303         txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
1304
1305         if (lp->tfd_start == lp->tfd_end) {
1306                 struct tc35815_regs __iomem *tr =
1307                         (struct tc35815_regs __iomem *)dev->base_addr;
1308                 /* Start DMA Transmitter. */
1309                 txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1310 #ifdef GATHER_TXINT
1311                 txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1312 #endif
1313                 if (netif_msg_tx_queued(lp)) {
1314                         printk("%s: starting TxFD.\n", dev->name);
1315                         dump_txfd(txfd);
1316                 }
1317                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1318         } else {
1319                 txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
1320                 if (netif_msg_tx_queued(lp)) {
1321                         printk("%s: queueing TxFD.\n", dev->name);
1322                         dump_txfd(txfd);
1323                 }
1324         }
1325         lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
1326
1327         dev->trans_start = jiffies;
1328
1329         /* If we just used up the very last entry in the
1330          * TX ring on this device, tell the queueing
1331          * layer to send no more.
1332          */
1333         if (tc35815_tx_full(dev)) {
1334                 if (netif_msg_tx_queued(lp))
1335                         printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
1336                 netif_stop_queue(dev);
1337         }
1338
1339         /* When the TX completion hw interrupt arrives, this
1340          * is when the transmit statistics are updated.
1341          */
1342
1343         spin_unlock_irqrestore(&lp->lock, flags);
1344         return 0;
1345 }
1346
1347 #define FATAL_ERROR_INT \
1348         (Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
1349 static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
1350 {
1351         static int count;
1352         printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
1353                dev->name, status);
1354         if (status & Int_IntPCI)
1355                 printk(" IntPCI");
1356         if (status & Int_DmParErr)
1357                 printk(" DmParErr");
1358         if (status & Int_IntNRAbt)
1359                 printk(" IntNRAbt");
1360         printk("\n");
1361         if (count++ > 100)
1362                 panic("%s: Too many fatal errors.", dev->name);
1363         printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
1364         /* Try to restart the adaptor. */
1365         tc35815_restart(dev);
1366 }
1367
1368 #ifdef TC35815_NAPI
1369 static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
1370 #else
1371 static int tc35815_do_interrupt(struct net_device *dev, u32 status)
1372 #endif
1373 {
1374         struct tc35815_local *lp = dev->priv;
1375         struct tc35815_regs __iomem *tr =
1376                 (struct tc35815_regs __iomem *)dev->base_addr;
1377         int ret = -1;
1378
1379         /* Fatal errors... */
1380         if (status & FATAL_ERROR_INT) {
1381                 tc35815_fatal_error_interrupt(dev, status);
1382                 return 0;
1383         }
1384         /* recoverable errors */
1385         if (status & Int_IntFDAEx) {
1386                 /* disable FDAEx int. (until we make rooms...) */
1387                 tc_writel(tc_readl(&tr->Int_En) & ~Int_FDAExEn, &tr->Int_En);
1388                 printk(KERN_WARNING
1389                        "%s: Free Descriptor Area Exhausted (%#x).\n",
1390                        dev->name, status);
1391                 lp->stats.rx_dropped++;
1392                 ret = 0;
1393         }
1394         if (status & Int_IntBLEx) {
1395                 /* disable BLEx int. (until we make rooms...) */
1396                 tc_writel(tc_readl(&tr->Int_En) & ~Int_BLExEn, &tr->Int_En);
1397                 printk(KERN_WARNING
1398                        "%s: Buffer List Exhausted (%#x).\n",
1399                        dev->name, status);
1400                 lp->stats.rx_dropped++;
1401                 ret = 0;
1402         }
1403         if (status & Int_IntExBD) {
1404                 printk(KERN_WARNING
1405                        "%s: Excessive Buffer Descriptiors (%#x).\n",
1406                        dev->name, status);
1407                 lp->stats.rx_length_errors++;
1408                 ret = 0;
1409         }
1410
1411         /* normal notification */
1412         if (status & Int_IntMacRx) {
1413                 /* Got a packet(s). */
1414 #ifdef TC35815_NAPI
1415                 ret = tc35815_rx(dev, limit);
1416 #else
1417                 tc35815_rx(dev);
1418                 ret = 0;
1419 #endif
1420                 lp->lstats.rx_ints++;
1421         }
1422         if (status & Int_IntMacTx) {
1423                 /* Transmit complete. */
1424                 lp->lstats.tx_ints++;
1425                 tc35815_txdone(dev);
1426                 netif_wake_queue(dev);
1427                 ret = 0;
1428         }
1429         return ret;
1430 }
1431
1432 /*
1433  * The typical workload of the driver:
1434  * Handle the network interface interrupts.
1435  */
1436 static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
1437 {
1438         struct net_device *dev = dev_id;
1439         struct tc35815_regs __iomem *tr =
1440                 (struct tc35815_regs __iomem *)dev->base_addr;
1441 #ifdef TC35815_NAPI
1442         u32 dmactl = tc_readl(&tr->DMA_Ctl);
1443
1444         if (!(dmactl & DMA_IntMask)) {
1445                 /* disable interrupts */
1446                 tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
1447                 if (netif_rx_schedule_prep(dev))
1448                         __netif_rx_schedule(dev);
1449                 else {
1450                         printk(KERN_ERR "%s: interrupt taken in poll\n",
1451                                dev->name);
1452                         BUG();
1453                 }
1454                 (void)tc_readl(&tr->Int_Src);   /* flush */
1455                 return IRQ_HANDLED;
1456         }
1457         return IRQ_NONE;
1458 #else
1459         struct tc35815_local *lp = dev->priv;
1460         int handled;
1461         u32 status;
1462
1463         spin_lock(&lp->lock);
1464         status = tc_readl(&tr->Int_Src);
1465         tc_writel(status, &tr->Int_Src);        /* write to clear */
1466         handled = tc35815_do_interrupt(dev, status);
1467         (void)tc_readl(&tr->Int_Src);   /* flush */
1468         spin_unlock(&lp->lock);
1469         return IRQ_RETVAL(handled >= 0);
1470 #endif /* TC35815_NAPI */
1471 }
1472
1473 #ifdef CONFIG_NET_POLL_CONTROLLER
1474 static void tc35815_poll_controller(struct net_device *dev)
1475 {
1476         disable_irq(dev->irq);
1477         tc35815_interrupt(dev->irq, dev);
1478         enable_irq(dev->irq);
1479 }
1480 #endif
1481
1482 /* We have a good packet(s), get it/them out of the buffers. */
1483 #ifdef TC35815_NAPI
1484 static int
1485 tc35815_rx(struct net_device *dev, int limit)
1486 #else
1487 static void
1488 tc35815_rx(struct net_device *dev)
1489 #endif
1490 {
1491         struct tc35815_local *lp = dev->priv;
1492         unsigned int fdctl;
1493         int i;
1494         int buf_free_count = 0;
1495         int fd_free_count = 0;
1496 #ifdef TC35815_NAPI
1497         int received = 0;
1498 #endif
1499
1500         while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
1501                 int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
1502                 int pkt_len = fdctl & FD_FDLength_MASK;
1503                 int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1504 #ifdef DEBUG
1505                 struct RxFD *next_rfd;
1506 #endif
1507 #if (RX_CTL_CMD & Rx_StripCRC) == 0
1508                 pkt_len -= 4;
1509 #endif
1510
1511                 if (netif_msg_rx_status(lp))
1512                         dump_rxfd(lp->rfd_cur);
1513                 if (status & Rx_Good) {
1514                         struct sk_buff *skb;
1515                         unsigned char *data;
1516                         int cur_bd;
1517 #ifdef TC35815_USE_PACKEDBUFFER
1518                         int offset;
1519 #endif
1520
1521 #ifdef TC35815_NAPI
1522                         if (--limit < 0)
1523                                 break;
1524 #endif
1525 #ifdef TC35815_USE_PACKEDBUFFER
1526                         BUG_ON(bd_count > 2);
1527                         skb = dev_alloc_skb(pkt_len + 2); /* +2: for reserve */
1528                         if (skb == NULL) {
1529                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
1530                                        dev->name);
1531                                 lp->stats.rx_dropped++;
1532                                 break;
1533                         }
1534                         skb_reserve(skb, 2);   /* 16 bit alignment */
1535
1536                         data = skb_put(skb, pkt_len);
1537
1538                         /* copy from receive buffer */
1539                         cur_bd = 0;
1540                         offset = 0;
1541                         while (offset < pkt_len && cur_bd < bd_count) {
1542                                 int len = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BDCtl) &
1543                                         BD_BuffLength_MASK;
1544                                 dma_addr_t dma = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BuffData);
1545                                 void *rxbuf = rxbuf_bus_to_virt(lp, dma);
1546                                 if (offset + len > pkt_len)
1547                                         len = pkt_len - offset;
1548 #ifdef TC35815_DMA_SYNC_ONDEMAND
1549                                 pci_dma_sync_single_for_cpu(lp->pci_dev,
1550                                                             dma, len,
1551                                                             PCI_DMA_FROMDEVICE);
1552 #endif
1553                                 memcpy(data + offset, rxbuf, len);
1554 #ifdef TC35815_DMA_SYNC_ONDEMAND
1555                                 pci_dma_sync_single_for_device(lp->pci_dev,
1556                                                                dma, len,
1557                                                                PCI_DMA_FROMDEVICE);
1558 #endif
1559                                 offset += len;
1560                                 cur_bd++;
1561                         }
1562 #else /* TC35815_USE_PACKEDBUFFER */
1563                         BUG_ON(bd_count > 1);
1564                         cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
1565                                   & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1566 #ifdef DEBUG
1567                         if (cur_bd >= RX_BUF_NUM) {
1568                                 printk("%s: invalid BDID.\n", dev->name);
1569                                 panic_queues(dev);
1570                         }
1571                         BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
1572                                (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
1573                         if (!lp->rx_skbs[cur_bd].skb) {
1574                                 printk("%s: NULL skb.\n", dev->name);
1575                                 panic_queues(dev);
1576                         }
1577 #else
1578                         BUG_ON(cur_bd >= RX_BUF_NUM);
1579 #endif
1580                         skb = lp->rx_skbs[cur_bd].skb;
1581                         prefetch(skb->data);
1582                         lp->rx_skbs[cur_bd].skb = NULL;
1583                         lp->fbl_count--;
1584                         pci_unmap_single(lp->pci_dev,
1585                                          lp->rx_skbs[cur_bd].skb_dma,
1586                                          RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1587                         if (!HAVE_DMA_RXALIGN(lp))
1588                                 memmove(skb->data, skb->data - 2, pkt_len);
1589                         data = skb_put(skb, pkt_len);
1590 #endif /* TC35815_USE_PACKEDBUFFER */
1591                         if (netif_msg_pktdata(lp))
1592                                 print_eth(data);
1593                         skb->protocol = eth_type_trans(skb, dev);
1594 #ifdef TC35815_NAPI
1595                         netif_receive_skb(skb);
1596                         received++;
1597 #else
1598                         netif_rx(skb);
1599 #endif
1600                         dev->last_rx = jiffies;
1601                         lp->stats.rx_packets++;
1602                         lp->stats.rx_bytes += pkt_len;
1603                 } else {
1604                         lp->stats.rx_errors++;
1605                         printk(KERN_DEBUG "%s: Rx error (status %x)\n",
1606                                dev->name, status & Rx_Stat_Mask);
1607                         /* WORKAROUND: LongErr and CRCErr means Overflow. */
1608                         if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
1609                                 status &= ~(Rx_LongErr|Rx_CRCErr);
1610                                 status |= Rx_Over;
1611                         }
1612                         if (status & Rx_LongErr) lp->stats.rx_length_errors++;
1613                         if (status & Rx_Over) lp->stats.rx_fifo_errors++;
1614                         if (status & Rx_CRCErr) lp->stats.rx_crc_errors++;
1615                         if (status & Rx_Align) lp->stats.rx_frame_errors++;
1616                 }
1617
1618                 if (bd_count > 0) {
1619                         /* put Free Buffer back to controller */
1620                         int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
1621                         unsigned char id =
1622                                 (bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1623 #ifdef DEBUG
1624                         if (id >= RX_BUF_NUM) {
1625                                 printk("%s: invalid BDID.\n", dev->name);
1626                                 panic_queues(dev);
1627                         }
1628 #else
1629                         BUG_ON(id >= RX_BUF_NUM);
1630 #endif
1631                         /* free old buffers */
1632 #ifdef TC35815_USE_PACKEDBUFFER
1633                         while (lp->fbl_curid != id)
1634 #else
1635                         while (lp->fbl_count < RX_BUF_NUM)
1636 #endif
1637                         {
1638 #ifdef TC35815_USE_PACKEDBUFFER
1639                                 unsigned char curid = lp->fbl_curid;
1640 #else
1641                                 unsigned char curid =
1642                                         (id + 1 + lp->fbl_count) % RX_BUF_NUM;
1643 #endif
1644                                 struct BDesc *bd = &lp->fbl_ptr->bd[curid];
1645 #ifdef DEBUG
1646                                 bdctl = le32_to_cpu(bd->BDCtl);
1647                                 if (bdctl & BD_CownsBD) {
1648                                         printk("%s: Freeing invalid BD.\n",
1649                                                dev->name);
1650                                         panic_queues(dev);
1651                                 }
1652 #endif
1653                                 /* pass BD to controler */
1654 #ifndef TC35815_USE_PACKEDBUFFER
1655                                 if (!lp->rx_skbs[curid].skb) {
1656                                         lp->rx_skbs[curid].skb =
1657                                                 alloc_rxbuf_skb(dev,
1658                                                                 lp->pci_dev,
1659                                                                 &lp->rx_skbs[curid].skb_dma);
1660                                         if (!lp->rx_skbs[curid].skb)
1661                                                 break; /* try on next reception */
1662                                         bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
1663                                 }
1664 #endif /* TC35815_USE_PACKEDBUFFER */
1665                                 /* Note: BDLength was modified by chip. */
1666                                 bd->BDCtl = cpu_to_le32(BD_CownsBD |
1667                                                         (curid << BD_RxBDID_SHIFT) |
1668                                                         RX_BUF_SIZE);
1669 #ifdef TC35815_USE_PACKEDBUFFER
1670                                 lp->fbl_curid = (curid + 1) % RX_BUF_NUM;
1671                                 if (netif_msg_rx_status(lp)) {
1672                                         printk("%s: Entering new FBD %d\n",
1673                                                dev->name, lp->fbl_curid);
1674                                         dump_frfd(lp->fbl_ptr);
1675                                 }
1676 #else
1677                                 lp->fbl_count++;
1678 #endif
1679                                 buf_free_count++;
1680                         }
1681                 }
1682
1683                 /* put RxFD back to controller */
1684 #ifdef DEBUG
1685                 next_rfd = fd_bus_to_virt(lp,
1686                                           le32_to_cpu(lp->rfd_cur->fd.FDNext));
1687                 if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
1688                         printk("%s: RxFD FDNext invalid.\n", dev->name);
1689                         panic_queues(dev);
1690                 }
1691 #endif
1692                 for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
1693                         /* pass FD to controler */
1694 #ifdef DEBUG
1695                         lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
1696 #else
1697                         lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
1698 #endif
1699                         lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
1700                         lp->rfd_cur++;
1701                         fd_free_count++;
1702                 }
1703                 if (lp->rfd_cur > lp->rfd_limit)
1704                         lp->rfd_cur = lp->rfd_base;
1705 #ifdef DEBUG
1706                 if (lp->rfd_cur != next_rfd)
1707                         printk("rfd_cur = %p, next_rfd %p\n",
1708                                lp->rfd_cur, next_rfd);
1709 #endif
1710         }
1711
1712         /* re-enable BL/FDA Exhaust interrupts. */
1713         if (fd_free_count) {
1714                 struct tc35815_regs __iomem *tr =
1715                         (struct tc35815_regs __iomem *)dev->base_addr;
1716                 u32 en, en_old = tc_readl(&tr->Int_En);
1717                 en = en_old | Int_FDAExEn;
1718                 if (buf_free_count)
1719                         en |= Int_BLExEn;
1720                 if (en != en_old)
1721                         tc_writel(en, &tr->Int_En);
1722         }
1723 #ifdef TC35815_NAPI
1724         return received;
1725 #endif
1726 }
1727
1728 #ifdef TC35815_NAPI
1729 static int
1730 tc35815_poll(struct net_device *dev, int *budget)
1731 {
1732         struct tc35815_local *lp = dev->priv;
1733         struct tc35815_regs __iomem *tr =
1734                 (struct tc35815_regs __iomem *)dev->base_addr;
1735         int limit = min(*budget, dev->quota);
1736         int received = 0, handled;
1737         u32 status;
1738
1739         spin_lock(&lp->lock);
1740         status = tc_readl(&tr->Int_Src);
1741         do {
1742                 tc_writel(status, &tr->Int_Src);        /* write to clear */
1743
1744                 handled = tc35815_do_interrupt(dev, status, limit);
1745                 if (handled >= 0) {
1746                         received += handled;
1747                         limit -= handled;
1748                         if (limit <= 0)
1749                                 break;
1750                 }
1751                 status = tc_readl(&tr->Int_Src);
1752         } while (status);
1753         spin_unlock(&lp->lock);
1754
1755         dev->quota -= received;
1756         *budget -= received;
1757         if (limit <= 0)
1758                 return 1;
1759
1760         netif_rx_complete(dev);
1761         /* enable interrupts */
1762         tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
1763         return 0;
1764 }
1765 #endif
1766
1767 #ifdef NO_CHECK_CARRIER
1768 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1769 #else
1770 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1771 #endif
1772
1773 static void
1774 tc35815_check_tx_stat(struct net_device *dev, int status)
1775 {
1776         struct tc35815_local *lp = dev->priv;
1777         const char *msg = NULL;
1778
1779         /* count collisions */
1780         if (status & Tx_ExColl)
1781                 lp->stats.collisions += 16;
1782         if (status & Tx_TxColl_MASK)
1783                 lp->stats.collisions += status & Tx_TxColl_MASK;
1784
1785 #ifndef NO_CHECK_CARRIER
1786         /* TX4939 does not have NCarr */
1787         if (lp->boardtype == TC35815_TX4939)
1788                 status &= ~Tx_NCarr;
1789 #ifdef WORKAROUND_LOSTCAR
1790         /* WORKAROUND: ignore LostCrS in full duplex operation */
1791         if ((lp->timer_state != asleep && lp->timer_state != lcheck)
1792             || lp->fullduplex)
1793                 status &= ~Tx_NCarr;
1794 #endif
1795 #endif
1796
1797         if (!(status & TX_STA_ERR)) {
1798                 /* no error. */
1799                 lp->stats.tx_packets++;
1800                 return;
1801         }
1802
1803         lp->stats.tx_errors++;
1804         if (status & Tx_ExColl) {
1805                 lp->stats.tx_aborted_errors++;
1806                 msg = "Excessive Collision.";
1807         }
1808         if (status & Tx_Under) {
1809                 lp->stats.tx_fifo_errors++;
1810                 msg = "Tx FIFO Underrun.";
1811                 if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
1812                         lp->lstats.tx_underrun++;
1813                         if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
1814                                 struct tc35815_regs __iomem *tr =
1815                                         (struct tc35815_regs __iomem *)dev->base_addr;
1816                                 tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
1817                                 msg = "Tx FIFO Underrun.Change Tx threshold to max.";
1818                         }
1819                 }
1820         }
1821         if (status & Tx_Defer) {
1822                 lp->stats.tx_fifo_errors++;
1823                 msg = "Excessive Deferral.";
1824         }
1825 #ifndef NO_CHECK_CARRIER
1826         if (status & Tx_NCarr) {
1827                 lp->stats.tx_carrier_errors++;
1828                 msg = "Lost Carrier Sense.";
1829         }
1830 #endif
1831         if (status & Tx_LateColl) {
1832                 lp->stats.tx_aborted_errors++;
1833                 msg = "Late Collision.";
1834         }
1835         if (status & Tx_TxPar) {
1836                 lp->stats.tx_fifo_errors++;
1837                 msg = "Transmit Parity Error.";
1838         }
1839         if (status & Tx_SQErr) {
1840                 lp->stats.tx_heartbeat_errors++;
1841                 msg = "Signal Quality Error.";
1842         }
1843         if (msg && netif_msg_tx_err(lp))
1844                 printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
1845 }
1846
1847 /* This handles TX complete events posted by the device
1848  * via interrupts.
1849  */
1850 static void
1851 tc35815_txdone(struct net_device *dev)
1852 {
1853         struct tc35815_local *lp = dev->priv;
1854         struct TxFD *txfd;
1855         unsigned int fdctl;
1856
1857         txfd = &lp->tfd_base[lp->tfd_end];
1858         while (lp->tfd_start != lp->tfd_end &&
1859                !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
1860                 int status = le32_to_cpu(txfd->fd.FDStat);
1861                 struct sk_buff *skb;
1862                 unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
1863                 u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
1864
1865                 if (netif_msg_tx_done(lp)) {
1866                         printk("%s: complete TxFD.\n", dev->name);
1867                         dump_txfd(txfd);
1868                 }
1869                 tc35815_check_tx_stat(dev, status);
1870
1871                 skb = fdsystem != 0xffffffff ?
1872                         lp->tx_skbs[fdsystem].skb : NULL;
1873 #ifdef DEBUG
1874                 if (lp->tx_skbs[lp->tfd_end].skb != skb) {
1875                         printk("%s: tx_skbs mismatch.\n", dev->name);
1876                         panic_queues(dev);
1877                 }
1878 #else
1879                 BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
1880 #endif
1881                 if (skb) {
1882                         lp->stats.tx_bytes += skb->len;
1883                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
1884                         lp->tx_skbs[lp->tfd_end].skb = NULL;
1885                         lp->tx_skbs[lp->tfd_end].skb_dma = 0;
1886 #ifdef TC35815_NAPI
1887                         dev_kfree_skb_any(skb);
1888 #else
1889                         dev_kfree_skb_irq(skb);
1890 #endif
1891                 }
1892                 txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
1893
1894                 lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
1895                 txfd = &lp->tfd_base[lp->tfd_end];
1896 #ifdef DEBUG
1897                 if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
1898                         printk("%s: TxFD FDNext invalid.\n", dev->name);
1899                         panic_queues(dev);
1900                 }
1901 #endif
1902                 if (fdnext & FD_Next_EOL) {
1903                         /* DMA Transmitter has been stopping... */
1904                         if (lp->tfd_end != lp->tfd_start) {
1905                                 struct tc35815_regs __iomem *tr =
1906                                         (struct tc35815_regs __iomem *)dev->base_addr;
1907                                 int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
1908                                 struct TxFD* txhead = &lp->tfd_base[head];
1909                                 int qlen = (lp->tfd_start + TX_FD_NUM
1910                                             - lp->tfd_end) % TX_FD_NUM;
1911
1912 #ifdef DEBUG
1913                                 if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
1914                                         printk("%s: TxFD FDCtl invalid.\n", dev->name);
1915                                         panic_queues(dev);
1916                                 }
1917 #endif
1918                                 /* log max queue length */
1919                                 if (lp->lstats.max_tx_qlen < qlen)
1920                                         lp->lstats.max_tx_qlen = qlen;
1921
1922
1923                                 /* start DMA Transmitter again */
1924                                 txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1925 #ifdef GATHER_TXINT
1926                                 txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1927 #endif
1928                                 if (netif_msg_tx_queued(lp)) {
1929                                         printk("%s: start TxFD on queue.\n",
1930                                                dev->name);
1931                                         dump_txfd(txfd);
1932                                 }
1933                                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1934                         }
1935                         break;
1936                 }
1937         }
1938
1939         /* If we had stopped the queue due to a "tx full"
1940          * condition, and space has now been made available,
1941          * wake up the queue.
1942          */
1943         if (netif_queue_stopped(dev) && ! tc35815_tx_full(dev))
1944                 netif_wake_queue(dev);
1945 }
1946
1947 /* The inverse routine to tc35815_open(). */
1948 static int
1949 tc35815_close(struct net_device *dev)
1950 {
1951         struct tc35815_local *lp = dev->priv;
1952         netif_stop_queue(dev);
1953
1954         /* Flush the Tx and disable Rx here. */
1955
1956         del_timer(&lp->timer);          /* Kill if running      */
1957         tc35815_chip_reset(dev);
1958         free_irq(dev->irq, dev);
1959
1960         tc35815_free_queues(dev);
1961
1962         return 0;
1963
1964 }
1965
1966 /*
1967  * Get the current statistics.
1968  * This may be called with the card open or closed.
1969  */
1970 static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
1971 {
1972         struct tc35815_local *lp = dev->priv;
1973         struct tc35815_regs __iomem *tr =
1974                 (struct tc35815_regs __iomem *)dev->base_addr;
1975         if (netif_running(dev)) {
1976                 /* Update the statistics from the device registers. */
1977                 lp->stats.rx_missed_errors = tc_readl(&tr->Miss_Cnt);
1978         }
1979
1980         return &lp->stats;
1981 }
1982
1983 static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
1984 {
1985         struct tc35815_local *lp = dev->priv;
1986         struct tc35815_regs __iomem *tr =
1987                 (struct tc35815_regs __iomem *)dev->base_addr;
1988         int cam_index = index * 6;
1989         u32 cam_data;
1990         u32 saved_addr;
1991         saved_addr = tc_readl(&tr->CAM_Adr);
1992
1993         if (netif_msg_hw(lp)) {
1994                 int i;
1995                 printk(KERN_DEBUG "%s: CAM %d:", dev->name, index);
1996                 for (i = 0; i < 6; i++)
1997                         printk(" %02x", addr[i]);
1998                 printk("\n");
1999         }
2000         if (index & 1) {
2001                 /* read modify write */
2002                 tc_writel(cam_index - 2, &tr->CAM_Adr);
2003                 cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
2004                 cam_data |= addr[0] << 8 | addr[1];
2005                 tc_writel(cam_data, &tr->CAM_Data);
2006                 /* write whole word */
2007                 tc_writel(cam_index + 2, &tr->CAM_Adr);
2008                 cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
2009                 tc_writel(cam_data, &tr->CAM_Data);
2010         } else {
2011                 /* write whole word */
2012                 tc_writel(cam_index, &tr->CAM_Adr);
2013                 cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
2014                 tc_writel(cam_data, &tr->CAM_Data);
2015                 /* read modify write */
2016                 tc_writel(cam_index + 4, &tr->CAM_Adr);
2017                 cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
2018                 cam_data |= addr[4] << 24 | (addr[5] << 16);
2019                 tc_writel(cam_data, &tr->CAM_Data);
2020         }
2021
2022         tc_writel(saved_addr, &tr->CAM_Adr);
2023 }
2024
2025
2026 /*
2027  * Set or clear the multicast filter for this adaptor.
2028  * num_addrs == -1      Promiscuous mode, receive all packets
2029  * num_addrs == 0       Normal mode, clear multicast list
2030  * num_addrs > 0        Multicast mode, receive normal and MC packets,
2031  *                      and do best-effort filtering.
2032  */
2033 static void
2034 tc35815_set_multicast_list(struct net_device *dev)
2035 {
2036         struct tc35815_regs __iomem *tr =
2037                 (struct tc35815_regs __iomem *)dev->base_addr;
2038
2039         if (dev->flags&IFF_PROMISC)
2040         {
2041 #ifdef WORKAROUND_100HALF_PROMISC
2042                 /* With some (all?) 100MHalf HUB, controller will hang
2043                  * if we enabled promiscuous mode before linkup... */
2044                 struct tc35815_local *lp = dev->priv;
2045                 int pid = lp->phy_addr;
2046                 if (!(tc_mdio_read(dev, pid, MII_BMSR) & BMSR_LSTATUS))
2047                         return;
2048 #endif
2049                 /* Enable promiscuous mode */
2050                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
2051         }
2052         else if((dev->flags&IFF_ALLMULTI) || dev->mc_count > CAM_ENTRY_MAX - 3)
2053         {
2054                 /* CAM 0, 1, 20 are reserved. */
2055                 /* Disable promiscuous mode, use normal mode. */
2056                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
2057         }
2058         else if(dev->mc_count)
2059         {
2060                 struct dev_mc_list* cur_addr = dev->mc_list;
2061                 int i;
2062                 int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
2063
2064                 tc_writel(0, &tr->CAM_Ctl);
2065                 /* Walk the address list, and load the filter */
2066                 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
2067                         if (!cur_addr)
2068                                 break;
2069                         /* entry 0,1 is reserved. */
2070                         tc35815_set_cam_entry(dev, i + 2, cur_addr->dmi_addr);
2071                         ena_bits |= CAM_Ena_Bit(i + 2);
2072                 }
2073                 tc_writel(ena_bits, &tr->CAM_Ena);
2074                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2075         }
2076         else {
2077                 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2078                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2079         }
2080 }
2081
2082 static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2083 {
2084         struct tc35815_local *lp = dev->priv;
2085         strcpy(info->driver, MODNAME);
2086         strcpy(info->version, DRV_VERSION);
2087         strcpy(info->bus_info, pci_name(lp->pci_dev));
2088 }
2089
2090 static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2091 {
2092         struct tc35815_local *lp = dev->priv;
2093         spin_lock_irq(&lp->lock);
2094         mii_ethtool_gset(&lp->mii, cmd);
2095         spin_unlock_irq(&lp->lock);
2096         return 0;
2097 }
2098
2099 static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2100 {
2101         struct tc35815_local *lp = dev->priv;
2102         int rc;
2103 #if 1   /* use our negotiation method... */
2104         /* Verify the settings we care about. */
2105         if (cmd->autoneg != AUTONEG_ENABLE &&
2106             cmd->autoneg != AUTONEG_DISABLE)
2107                 return -EINVAL;
2108         if (cmd->autoneg == AUTONEG_DISABLE &&
2109             ((cmd->speed != SPEED_100 &&
2110               cmd->speed != SPEED_10) ||
2111              (cmd->duplex != DUPLEX_HALF &&
2112               cmd->duplex != DUPLEX_FULL)))
2113                 return -EINVAL;
2114
2115         /* Ok, do it to it. */
2116         spin_lock_irq(&lp->lock);
2117         del_timer(&lp->timer);
2118         tc35815_start_auto_negotiation(dev, cmd);
2119         spin_unlock_irq(&lp->lock);
2120         rc = 0;
2121 #else
2122         spin_lock_irq(&lp->lock);
2123         rc = mii_ethtool_sset(&lp->mii, cmd);
2124         spin_unlock_irq(&lp->lock);
2125 #endif
2126         return rc;
2127 }
2128
2129 static int tc35815_nway_reset(struct net_device *dev)
2130 {
2131         struct tc35815_local *lp = dev->priv;
2132         int rc;
2133         spin_lock_irq(&lp->lock);
2134         rc = mii_nway_restart(&lp->mii);
2135         spin_unlock_irq(&lp->lock);
2136         return rc;
2137 }
2138
2139 static u32 tc35815_get_link(struct net_device *dev)
2140 {
2141         struct tc35815_local *lp = dev->priv;
2142         int rc;
2143         spin_lock_irq(&lp->lock);
2144         rc = mii_link_ok(&lp->mii);
2145         spin_unlock_irq(&lp->lock);
2146         return rc;
2147 }
2148
2149 static u32 tc35815_get_msglevel(struct net_device *dev)
2150 {
2151         struct tc35815_local *lp = dev->priv;
2152         return lp->msg_enable;
2153 }
2154
2155 static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
2156 {
2157         struct tc35815_local *lp = dev->priv;
2158         lp->msg_enable = datum;
2159 }
2160
2161 static int tc35815_get_stats_count(struct net_device *dev)
2162 {
2163         struct tc35815_local *lp = dev->priv;
2164         return sizeof(lp->lstats) / sizeof(int);
2165 }
2166
2167 static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2168 {
2169         struct tc35815_local *lp = dev->priv;
2170         data[0] = lp->lstats.max_tx_qlen;
2171         data[1] = lp->lstats.tx_ints;
2172         data[2] = lp->lstats.rx_ints;
2173         data[3] = lp->lstats.tx_underrun;
2174 }
2175
2176 static struct {
2177         const char str[ETH_GSTRING_LEN];
2178 } ethtool_stats_keys[] = {
2179         { "max_tx_qlen" },
2180         { "tx_ints" },
2181         { "rx_ints" },
2182         { "tx_underrun" },
2183 };
2184
2185 static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2186 {
2187         memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2188 }
2189
2190 static const struct ethtool_ops tc35815_ethtool_ops = {
2191         .get_drvinfo            = tc35815_get_drvinfo,
2192         .get_settings           = tc35815_get_settings,
2193         .set_settings           = tc35815_set_settings,
2194         .nway_reset             = tc35815_nway_reset,
2195         .get_link               = tc35815_get_link,
2196         .get_msglevel           = tc35815_get_msglevel,
2197         .set_msglevel           = tc35815_set_msglevel,
2198         .get_strings            = tc35815_get_strings,
2199         .get_stats_count        = tc35815_get_stats_count,
2200         .get_ethtool_stats      = tc35815_get_ethtool_stats,
2201         .get_perm_addr          = ethtool_op_get_perm_addr,
2202 };
2203
2204 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2205 {
2206         struct tc35815_local *lp = dev->priv;
2207         int rc;
2208
2209         if (!netif_running(dev))
2210                 return -EINVAL;
2211
2212         spin_lock_irq(&lp->lock);
2213         rc = generic_mii_ioctl(&lp->mii, if_mii(rq), cmd, NULL);
2214         spin_unlock_irq(&lp->lock);
2215
2216         return rc;
2217 }
2218
2219 static int tc_mdio_read(struct net_device *dev, int phy_id, int location)
2220 {
2221         struct tc35815_regs __iomem *tr =
2222                 (struct tc35815_regs __iomem *)dev->base_addr;
2223         u32 data;
2224         tc_writel(MD_CA_Busy | (phy_id << 5) | location, &tr->MD_CA);
2225         while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
2226                 ;
2227         data = tc_readl(&tr->MD_Data);
2228         return data & 0xffff;
2229 }
2230
2231 static void tc_mdio_write(struct net_device *dev, int phy_id, int location,
2232                           int val)
2233 {
2234         struct tc35815_regs __iomem *tr =
2235                 (struct tc35815_regs __iomem *)dev->base_addr;
2236         tc_writel(val, &tr->MD_Data);
2237         tc_writel(MD_CA_Busy | MD_CA_Wr | (phy_id << 5) | location, &tr->MD_CA);
2238         while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
2239                 ;
2240 }
2241
2242 /* Auto negotiation.  The scheme is very simple.  We have a timer routine
2243  * that keeps watching the auto negotiation process as it progresses.
2244  * The DP83840 is first told to start doing it's thing, we set up the time
2245  * and place the timer state machine in it's initial state.
2246  *
2247  * Here the timer peeks at the DP83840 status registers at each click to see
2248  * if the auto negotiation has completed, we assume here that the DP83840 PHY
2249  * will time out at some point and just tell us what (didn't) happen.  For
2250  * complete coverage we only allow so many of the ticks at this level to run,
2251  * when this has expired we print a warning message and try another strategy.
2252  * This "other" strategy is to force the interface into various speed/duplex
2253  * configurations and we stop when we see a link-up condition before the
2254  * maximum number of "peek" ticks have occurred.
2255  *
2256  * Once a valid link status has been detected we configure the BigMAC and
2257  * the rest of the Happy Meal to speak the most efficient protocol we could
2258  * get a clean link for.  The priority for link configurations, highest first
2259  * is:
2260  *                 100 Base-T Full Duplex
2261  *                 100 Base-T Half Duplex
2262  *                 10 Base-T Full Duplex
2263  *                 10 Base-T Half Duplex
2264  *
2265  * We start a new timer now, after a successful auto negotiation status has
2266  * been detected.  This timer just waits for the link-up bit to get set in
2267  * the BMCR of the DP83840.  When this occurs we print a kernel log message
2268  * describing the link type in use and the fact that it is up.
2269  *
2270  * If a fatal error of some sort is signalled and detected in the interrupt
2271  * service routine, and the chip is reset, or the link is ifconfig'd down
2272  * and then back up, this entire process repeats itself all over again.
2273  */
2274 /* Note: Above comments are come from sunhme driver. */
2275
2276 static int tc35815_try_next_permutation(struct net_device *dev)
2277 {
2278         struct tc35815_local *lp = dev->priv;
2279         int pid = lp->phy_addr;
2280         unsigned short bmcr;
2281
2282         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2283
2284         /* Downgrade from full to half duplex.  Only possible via ethtool.  */
2285         if (bmcr & BMCR_FULLDPLX) {
2286                 bmcr &= ~BMCR_FULLDPLX;
2287                 printk(KERN_DEBUG "%s: try next permutation (BMCR %x)\n", dev->name, bmcr);
2288                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2289                 return 0;
2290         }
2291
2292         /* Downgrade from 100 to 10. */
2293         if (bmcr & BMCR_SPEED100) {
2294                 bmcr &= ~BMCR_SPEED100;
2295                 printk(KERN_DEBUG "%s: try next permutation (BMCR %x)\n", dev->name, bmcr);
2296                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2297                 return 0;
2298         }
2299
2300         /* We've tried everything. */
2301         return -1;
2302 }
2303
2304 static void
2305 tc35815_display_link_mode(struct net_device *dev)
2306 {
2307         struct tc35815_local *lp = dev->priv;
2308         int pid = lp->phy_addr;
2309         unsigned short lpa, bmcr;
2310         char *speed = "", *duplex = "";
2311
2312         lpa = tc_mdio_read(dev, pid, MII_LPA);
2313         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2314         if (options.speed ? (bmcr & BMCR_SPEED100) : (lpa & (LPA_100HALF | LPA_100FULL)))
2315                 speed = "100Mb/s";
2316         else
2317                 speed = "10Mb/s";
2318         if (options.duplex ? (bmcr & BMCR_FULLDPLX) : (lpa & (LPA_100FULL | LPA_10FULL)))
2319                 duplex = "Full Duplex";
2320         else
2321                 duplex = "Half Duplex";
2322
2323         if (netif_msg_link(lp))
2324                 printk(KERN_INFO "%s: Link is up at %s, %s.\n",
2325                        dev->name, speed, duplex);
2326         printk(KERN_DEBUG "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
2327                dev->name,
2328                bmcr, tc_mdio_read(dev, pid, MII_BMSR), lpa);
2329 }
2330
2331 static void tc35815_display_forced_link_mode(struct net_device *dev)
2332 {
2333         struct tc35815_local *lp = dev->priv;
2334         int pid = lp->phy_addr;
2335         unsigned short bmcr;
2336         char *speed = "", *duplex = "";
2337
2338         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2339         if (bmcr & BMCR_SPEED100)
2340                 speed = "100Mb/s";
2341         else
2342                 speed = "10Mb/s";
2343         if (bmcr & BMCR_FULLDPLX)
2344                 duplex = "Full Duplex.\n";
2345         else
2346                 duplex = "Half Duplex.\n";
2347
2348         if (netif_msg_link(lp))
2349                 printk(KERN_INFO "%s: Link has been forced up at %s, %s",
2350                        dev->name, speed, duplex);
2351 }
2352
2353 static void tc35815_set_link_modes(struct net_device *dev)
2354 {
2355         struct tc35815_local *lp = dev->priv;
2356         struct tc35815_regs __iomem *tr =
2357                 (struct tc35815_regs __iomem *)dev->base_addr;
2358         int pid = lp->phy_addr;
2359         unsigned short bmcr, lpa;
2360         int speed;
2361
2362         if (lp->timer_state == arbwait) {
2363                 lpa = tc_mdio_read(dev, pid, MII_LPA);
2364                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2365                 printk(KERN_DEBUG "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
2366                        dev->name,
2367                        bmcr, tc_mdio_read(dev, pid, MII_BMSR), lpa);
2368                 if (!(lpa & (LPA_10HALF | LPA_10FULL |
2369                              LPA_100HALF | LPA_100FULL))) {
2370                         /* fall back to 10HALF */
2371                         printk(KERN_INFO "%s: bad ability %04x - falling back to 10HD.\n",
2372                                dev->name, lpa);
2373                         lpa = LPA_10HALF;
2374                 }
2375                 if (options.duplex ? (bmcr & BMCR_FULLDPLX) : (lpa & (LPA_100FULL | LPA_10FULL)))
2376                         lp->fullduplex = 1;
2377                 else
2378                         lp->fullduplex = 0;
2379                 if (options.speed ? (bmcr & BMCR_SPEED100) : (lpa & (LPA_100HALF | LPA_100FULL)))
2380                         speed = 100;
2381                 else
2382                         speed = 10;
2383         } else {
2384                 /* Forcing a link mode. */
2385                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2386                 if (bmcr & BMCR_FULLDPLX)
2387                         lp->fullduplex = 1;
2388                 else
2389                         lp->fullduplex = 0;
2390                 if (bmcr & BMCR_SPEED100)
2391                         speed = 100;
2392                 else
2393                         speed = 10;
2394         }
2395
2396         tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_HaltReq, &tr->MAC_Ctl);
2397         if (lp->fullduplex) {
2398                 tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_FullDup, &tr->MAC_Ctl);
2399         } else {
2400                 tc_writel(tc_readl(&tr->MAC_Ctl) & ~MAC_FullDup, &tr->MAC_Ctl);
2401         }
2402         tc_writel(tc_readl(&tr->MAC_Ctl) & ~MAC_HaltReq, &tr->MAC_Ctl);
2403
2404         /* TX4939 PCFG.SPEEDn bit will be changed on NETDEV_CHANGE event. */
2405
2406 #ifndef NO_CHECK_CARRIER
2407         /* TX4939 does not have EnLCarr */
2408         if (lp->boardtype != TC35815_TX4939) {
2409 #ifdef WORKAROUND_LOSTCAR
2410                 /* WORKAROUND: enable LostCrS only if half duplex operation */
2411                 if (!lp->fullduplex && lp->boardtype != TC35815_TX4939)
2412                         tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr, &tr->Tx_Ctl);
2413 #endif
2414         }
2415 #endif
2416         lp->mii.full_duplex = lp->fullduplex;
2417 }
2418
2419 static void tc35815_timer(unsigned long data)
2420 {
2421         struct net_device *dev = (struct net_device *)data;
2422         struct tc35815_local *lp = dev->priv;
2423         int pid = lp->phy_addr;
2424         unsigned short bmsr, bmcr, lpa;
2425         int restart_timer = 0;
2426
2427         spin_lock_irq(&lp->lock);
2428
2429         lp->timer_ticks++;
2430         switch (lp->timer_state) {
2431         case arbwait:
2432                 /*
2433                  * Only allow for 5 ticks, thats 10 seconds and much too
2434                  * long to wait for arbitration to complete.
2435                  */
2436                 /* TC35815 need more times... */
2437                 if (lp->timer_ticks >= 10) {
2438                         /* Enter force mode. */
2439                         if (!options.doforce) {
2440                                 printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful,"
2441                                        " cable probblem?\n", dev->name);
2442                                 /* Try to restart the adaptor. */
2443                                 tc35815_restart(dev);
2444                                 goto out;
2445                         }
2446                         printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful,"
2447                                " trying force link mode\n", dev->name);
2448                         printk(KERN_DEBUG "%s: BMCR %x BMSR %x\n", dev->name,
2449                                tc_mdio_read(dev, pid, MII_BMCR),
2450                                tc_mdio_read(dev, pid, MII_BMSR));
2451                         bmcr = BMCR_SPEED100;
2452                         tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2453
2454                         /*
2455                          * OK, seems we need do disable the transceiver
2456                          * for the first tick to make sure we get an
2457                          * accurate link state at the second tick.
2458                          */
2459
2460                         lp->timer_state = ltrywait;
2461                         lp->timer_ticks = 0;
2462                         restart_timer = 1;
2463                 } else {
2464                         /* Anything interesting happen? */
2465                         bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2466                         if (bmsr & BMSR_ANEGCOMPLETE) {
2467                                 /* Just what we've been waiting for... */
2468                                 tc35815_set_link_modes(dev);
2469
2470                                 /*
2471                                  * Success, at least so far, advance our state
2472                                  * engine.
2473                                  */
2474                                 lp->timer_state = lupwait;
2475                                 restart_timer = 1;
2476                         } else {
2477                                 restart_timer = 1;
2478                         }
2479                 }
2480                 break;
2481
2482         case lupwait:
2483                 /*
2484                  * Auto negotiation was successful and we are awaiting a
2485                  * link up status.  I have decided to let this timer run
2486                  * forever until some sort of error is signalled, reporting
2487                  * a message to the user at 10 second intervals.
2488                  */
2489                 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2490                 if (bmsr & BMSR_LSTATUS) {
2491                         /*
2492                          * Wheee, it's up, display the link mode in use and put
2493                          * the timer to sleep.
2494                          */
2495                         tc35815_display_link_mode(dev);
2496                         netif_carrier_on(dev);
2497 #ifdef WORKAROUND_100HALF_PROMISC
2498                         /* delayed promiscuous enabling */
2499                         if (dev->flags & IFF_PROMISC)
2500                                 tc35815_set_multicast_list(dev);
2501 #endif
2502 #if 1
2503                         lp->saved_lpa = tc_mdio_read(dev, pid, MII_LPA);
2504                         lp->timer_state = lcheck;
2505                         restart_timer = 1;
2506 #else
2507                         lp->timer_state = asleep;
2508                         restart_timer = 0;
2509 #endif
2510                 } else {
2511                         if (lp->timer_ticks >= 10) {
2512                                 printk(KERN_NOTICE "%s: Auto negotiation successful, link still "
2513                                        "not completely up.\n", dev->name);
2514                                 lp->timer_ticks = 0;
2515                                 restart_timer = 1;
2516                         } else {
2517                                 restart_timer = 1;
2518                         }
2519                 }
2520                 break;
2521
2522         case ltrywait:
2523                 /*
2524                  * Making the timeout here too long can make it take
2525                  * annoyingly long to attempt all of the link mode
2526                  * permutations, but then again this is essentially
2527                  * error recovery code for the most part.
2528                  */
2529                 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2530                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2531                 if (lp->timer_ticks == 1) {
2532                         /*
2533                          * Re-enable transceiver, we'll re-enable the
2534                          * transceiver next tick, then check link state
2535                          * on the following tick.
2536                          */
2537                         restart_timer = 1;
2538                         break;
2539                 }
2540                 if (lp->timer_ticks == 2) {
2541                         restart_timer = 1;
2542                         break;
2543                 }
2544                 if (bmsr & BMSR_LSTATUS) {
2545                         /* Force mode selection success. */
2546                         tc35815_display_forced_link_mode(dev);
2547                         netif_carrier_on(dev);
2548                         tc35815_set_link_modes(dev);
2549 #ifdef WORKAROUND_100HALF_PROMISC
2550                         /* delayed promiscuous enabling */
2551                         if (dev->flags & IFF_PROMISC)
2552                                 tc35815_set_multicast_list(dev);
2553 #endif
2554 #if 1
2555                         lp->saved_lpa = tc_mdio_read(dev, pid, MII_LPA);
2556                         lp->timer_state = lcheck;
2557                         restart_timer = 1;
2558 #else
2559                         lp->timer_state = asleep;
2560                         restart_timer = 0;
2561 #endif
2562                 } else {
2563                         if (lp->timer_ticks >= 4) { /* 6 seconds or so... */
2564                                 int ret;
2565
2566                                 ret = tc35815_try_next_permutation(dev);
2567                                 if (ret == -1) {
2568                                         /*
2569                                          * Aieee, tried them all, reset the
2570                                          * chip and try all over again.
2571                                          */
2572                                         printk(KERN_NOTICE "%s: Link down, "
2573                                                "cable problem?\n",
2574                                                dev->name);
2575
2576                                         /* Try to restart the adaptor. */
2577                                         tc35815_restart(dev);
2578                                         goto out;
2579                                 }
2580                                 lp->timer_ticks = 0;
2581                                 restart_timer = 1;
2582                         } else {
2583                                 restart_timer = 1;
2584                         }
2585                 }
2586                 break;
2587
2588         case lcheck:
2589                 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2590                 lpa = tc_mdio_read(dev, pid, MII_LPA);
2591                 if (bmcr & (BMCR_PDOWN | BMCR_ISOLATE | BMCR_RESET)) {
2592                         printk(KERN_ERR "%s: PHY down? (BMCR %x)\n", dev->name,
2593                                bmcr);
2594                 } else if ((lp->saved_lpa ^ lpa) &
2595                            (LPA_100FULL|LPA_100HALF|LPA_10FULL|LPA_10HALF)) {
2596                         printk(KERN_NOTICE "%s: link status changed"
2597                                " (BMCR %x LPA %x->%x)\n", dev->name,
2598                                bmcr, lp->saved_lpa, lpa);
2599                 } else {
2600                         /* go on */
2601                         restart_timer = 1;
2602                         break;
2603                 }
2604                 /* Try to restart the adaptor. */
2605                 tc35815_restart(dev);
2606                 goto out;
2607
2608         case asleep:
2609         default:
2610                 /* Can't happens.... */
2611                 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got "
2612                        "one anyways!\n", dev->name);
2613                 restart_timer = 0;
2614                 lp->timer_ticks = 0;
2615                 lp->timer_state = asleep; /* foo on you */
2616                 break;
2617         }
2618
2619         if (restart_timer) {
2620                 lp->timer.expires = jiffies + msecs_to_jiffies(1200);
2621                 add_timer(&lp->timer);
2622         }
2623 out:
2624         spin_unlock_irq(&lp->lock);
2625 }
2626
2627 static void tc35815_start_auto_negotiation(struct net_device *dev,
2628                                            struct ethtool_cmd *ep)
2629 {
2630         struct tc35815_local *lp = dev->priv;
2631         int pid = lp->phy_addr;
2632         unsigned short bmsr, bmcr, advertize;
2633         int timeout;
2634
2635         netif_carrier_off(dev);
2636         bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2637         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2638         advertize = tc_mdio_read(dev, pid, MII_ADVERTISE);
2639
2640         if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
2641                 if (options.speed || options.duplex) {
2642                         /* Advertise only specified configuration. */
2643                         advertize &= ~(ADVERTISE_10HALF |
2644                                        ADVERTISE_10FULL |
2645                                        ADVERTISE_100HALF |
2646                                        ADVERTISE_100FULL);
2647                         if (options.speed != 10) {
2648                                 if (options.duplex != 1)
2649                                         advertize |= ADVERTISE_100FULL;
2650                                 if (options.duplex != 2)
2651                                         advertize |= ADVERTISE_100HALF;
2652                         }
2653                         if (options.speed != 100) {
2654                                 if (options.duplex != 1)
2655                                         advertize |= ADVERTISE_10FULL;
2656                                 if (options.duplex != 2)
2657                                         advertize |= ADVERTISE_10HALF;
2658                         }
2659                         if (options.speed == 100)
2660                                 bmcr |= BMCR_SPEED100;
2661                         else if (options.speed == 10)
2662                                 bmcr &= ~BMCR_SPEED100;
2663                         if (options.duplex == 2)
2664                                 bmcr |= BMCR_FULLDPLX;
2665                         else if (options.duplex == 1)
2666                                 bmcr &= ~BMCR_FULLDPLX;
2667                 } else {
2668                         /* Advertise everything we can support. */
2669                         if (bmsr & BMSR_10HALF)
2670                                 advertize |= ADVERTISE_10HALF;
2671                         else
2672                                 advertize &= ~ADVERTISE_10HALF;
2673                         if (bmsr & BMSR_10FULL)
2674                                 advertize |= ADVERTISE_10FULL;
2675                         else
2676                                 advertize &= ~ADVERTISE_10FULL;
2677                         if (bmsr & BMSR_100HALF)
2678                                 advertize |= ADVERTISE_100HALF;
2679                         else
2680                                 advertize &= ~ADVERTISE_100HALF;
2681                         if (bmsr & BMSR_100FULL)
2682                                 advertize |= ADVERTISE_100FULL;
2683                         else
2684                                 advertize &= ~ADVERTISE_100FULL;
2685                 }
2686
2687                 tc_mdio_write(dev, pid, MII_ADVERTISE, advertize);
2688
2689                 /* Enable Auto-Negotiation, this is usually on already... */
2690                 bmcr |= BMCR_ANENABLE;
2691                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2692
2693                 /* Restart it to make sure it is going. */
2694                 bmcr |= BMCR_ANRESTART;
2695                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2696                 printk(KERN_DEBUG "%s: ADVERTISE %x BMCR %x\n", dev->name, advertize, bmcr);
2697
2698                 /* BMCR_ANRESTART self clears when the process has begun. */
2699                 timeout = 64;  /* More than enough. */
2700                 while (--timeout) {
2701                         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2702                         if (!(bmcr & BMCR_ANRESTART))
2703                                 break; /* got it. */
2704                         udelay(10);
2705                 }
2706                 if (!timeout) {
2707                         printk(KERN_ERR "%s: TC35815 would not start auto "
2708                                "negotiation BMCR=0x%04x\n",
2709                                dev->name, bmcr);
2710                         printk(KERN_NOTICE "%s: Performing force link "
2711                                "detection.\n", dev->name);
2712                         goto force_link;
2713                 } else {
2714                         printk(KERN_DEBUG "%s: auto negotiation started.\n", dev->name);
2715                         lp->timer_state = arbwait;
2716                 }
2717         } else {
2718 force_link:
2719                 /* Force the link up, trying first a particular mode.
2720                  * Either we are here at the request of ethtool or
2721                  * because the Happy Meal would not start to autoneg.
2722                  */
2723
2724                 /* Disable auto-negotiation in BMCR, enable the duplex and
2725                  * speed setting, init the timer state machine, and fire it off.
2726                  */
2727                 if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
2728                         bmcr = BMCR_SPEED100;
2729                 } else {
2730                         if (ep->speed == SPEED_100)
2731                                 bmcr = BMCR_SPEED100;
2732                         else
2733                                 bmcr = 0;
2734                         if (ep->duplex == DUPLEX_FULL)
2735                                 bmcr |= BMCR_FULLDPLX;
2736                 }
2737                 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2738
2739                 /* OK, seems we need do disable the transceiver for the first
2740                  * tick to make sure we get an accurate link state at the
2741                  * second tick.
2742                  */
2743                 lp->timer_state = ltrywait;
2744         }
2745
2746         del_timer(&lp->timer);
2747         lp->timer_ticks = 0;
2748         lp->timer.expires = jiffies + msecs_to_jiffies(1200);
2749         add_timer(&lp->timer);
2750 }
2751
2752 static void tc35815_find_phy(struct net_device *dev)
2753 {
2754         struct tc35815_local *lp = dev->priv;
2755         int pid = lp->phy_addr;
2756         unsigned short id0;
2757
2758         /* find MII phy */
2759         for (pid = 31; pid >= 0; pid--) {
2760                 id0 = tc_mdio_read(dev, pid, MII_BMSR);
2761                 if (id0 != 0xffff && id0 != 0x0000 &&
2762                     (id0 & BMSR_RESV) != (0xffff & BMSR_RESV) /* paranoia? */
2763                         ) {
2764                         lp->phy_addr = pid;
2765                         break;
2766                 }
2767         }
2768         if (pid < 0) {
2769                 printk(KERN_ERR "%s: No MII Phy found.\n",
2770                        dev->name);
2771                 lp->phy_addr = pid = 0;
2772         }
2773
2774         lp->mii_id[0] = tc_mdio_read(dev, pid, MII_PHYSID1);
2775         lp->mii_id[1] = tc_mdio_read(dev, pid, MII_PHYSID2);
2776         if (netif_msg_hw(lp))
2777                 printk(KERN_INFO "%s: PHY(%02x) ID %04x %04x\n", dev->name,
2778                        pid, lp->mii_id[0], lp->mii_id[1]);
2779 }
2780
2781 static void tc35815_phy_chip_init(struct net_device *dev)
2782 {
2783         struct tc35815_local *lp = dev->priv;
2784         int pid = lp->phy_addr;
2785         unsigned short bmcr;
2786         struct ethtool_cmd ecmd, *ep;
2787
2788         /* dis-isolate if needed. */
2789         bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2790         if (bmcr & BMCR_ISOLATE) {
2791                 int count = 32;
2792                 printk(KERN_DEBUG "%s: unisolating...", dev->name);
2793                 tc_mdio_write(dev, pid, MII_BMCR, bmcr & ~BMCR_ISOLATE);
2794                 while (--count) {
2795                         if (!(tc_mdio_read(dev, pid, MII_BMCR) & BMCR_ISOLATE))
2796                                 break;
2797                         udelay(20);
2798                 }
2799                 printk(" %s.\n", count ? "done" : "failed");
2800         }
2801
2802         if (options.speed && options.duplex) {
2803                 ecmd.autoneg = AUTONEG_DISABLE;
2804                 ecmd.speed = options.speed == 10 ? SPEED_10 : SPEED_100;
2805                 ecmd.duplex = options.duplex == 1 ? DUPLEX_HALF : DUPLEX_FULL;
2806                 ep = &ecmd;
2807         } else {
2808                 ep = NULL;
2809         }
2810         tc35815_start_auto_negotiation(dev, ep);
2811 }
2812
2813 static void tc35815_chip_reset(struct net_device *dev)
2814 {
2815         struct tc35815_regs __iomem *tr =
2816                 (struct tc35815_regs __iomem *)dev->base_addr;
2817         int i;
2818         /* reset the controller */
2819         tc_writel(MAC_Reset, &tr->MAC_Ctl);
2820         udelay(4); /* 3200ns */
2821         i = 0;
2822         while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
2823                 if (i++ > 100) {
2824                         printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
2825                         break;
2826                 }
2827                 mdelay(1);
2828         }
2829         tc_writel(0, &tr->MAC_Ctl);
2830
2831         /* initialize registers to default value */
2832         tc_writel(0, &tr->DMA_Ctl);
2833         tc_writel(0, &tr->TxThrsh);
2834         tc_writel(0, &tr->TxPollCtr);
2835         tc_writel(0, &tr->RxFragSize);
2836         tc_writel(0, &tr->Int_En);
2837         tc_writel(0, &tr->FDA_Bas);
2838         tc_writel(0, &tr->FDA_Lim);
2839         tc_writel(0xffffffff, &tr->Int_Src);    /* Write 1 to clear */
2840         tc_writel(0, &tr->CAM_Ctl);
2841         tc_writel(0, &tr->Tx_Ctl);
2842         tc_writel(0, &tr->Rx_Ctl);
2843         tc_writel(0, &tr->CAM_Ena);
2844         (void)tc_readl(&tr->Miss_Cnt);  /* Read to clear */
2845
2846         /* initialize internal SRAM */
2847         tc_writel(DMA_TestMode, &tr->DMA_Ctl);
2848         for (i = 0; i < 0x1000; i += 4) {
2849                 tc_writel(i, &tr->CAM_Adr);
2850                 tc_writel(0, &tr->CAM_Data);
2851         }
2852         tc_writel(0, &tr->DMA_Ctl);
2853 }
2854
2855 static void tc35815_chip_init(struct net_device *dev)
2856 {
2857         struct tc35815_local *lp = dev->priv;
2858         struct tc35815_regs __iomem *tr =
2859                 (struct tc35815_regs __iomem *)dev->base_addr;
2860         unsigned long txctl = TX_CTL_CMD;
2861
2862         tc35815_phy_chip_init(dev);
2863
2864         /* load station address to CAM */
2865         tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
2866
2867         /* Enable CAM (broadcast and unicast) */
2868         tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2869         tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2870
2871         /* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
2872         if (HAVE_DMA_RXALIGN(lp))
2873                 tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
2874         else
2875                 tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
2876 #ifdef TC35815_USE_PACKEDBUFFER
2877         tc_writel(RxFrag_EnPack | ETH_ZLEN, &tr->RxFragSize);   /* Packing */
2878 #else
2879         tc_writel(ETH_ZLEN, &tr->RxFragSize);
2880 #endif
2881         tc_writel(0, &tr->TxPollCtr);   /* Batch mode */
2882         tc_writel(TX_THRESHOLD, &tr->TxThrsh);
2883         tc_writel(INT_EN_CMD, &tr->Int_En);
2884
2885         /* set queues */
2886         tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
2887         tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
2888                   &tr->FDA_Lim);
2889         /*
2890          * Activation method:
2891          * First, enable the MAC Transmitter and the DMA Receive circuits.
2892          * Then enable the DMA Transmitter and the MAC Receive circuits.
2893          */
2894         tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr);      /* start DMA receiver */
2895         tc_writel(RX_CTL_CMD, &tr->Rx_Ctl);     /* start MAC receiver */
2896
2897         /* start MAC transmitter */
2898 #ifndef NO_CHECK_CARRIER
2899         /* TX4939 does not have EnLCarr */
2900         if (lp->boardtype == TC35815_TX4939)
2901                 txctl &= ~Tx_EnLCarr;
2902 #ifdef WORKAROUND_LOSTCAR
2903         /* WORKAROUND: ignore LostCrS in full duplex operation */
2904         if ((lp->timer_state != asleep && lp->timer_state != lcheck) ||
2905             lp->fullduplex)
2906                 txctl &= ~Tx_EnLCarr;
2907 #endif
2908 #endif /* !NO_CHECK_CARRIER */
2909 #ifdef GATHER_TXINT
2910         txctl &= ~Tx_EnComp;    /* disable global tx completion int. */
2911 #endif
2912         tc_writel(txctl, &tr->Tx_Ctl);
2913 }
2914
2915 #ifdef CONFIG_PM
2916 static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
2917 {
2918         struct net_device *dev = pci_get_drvdata(pdev);
2919         struct tc35815_local *lp = dev->priv;
2920         unsigned long flags;
2921
2922         pci_save_state(pdev);
2923         if (!netif_running(dev))
2924                 return 0;
2925         netif_device_detach(dev);
2926         spin_lock_irqsave(&lp->lock, flags);
2927         del_timer(&lp->timer);          /* Kill if running      */
2928         tc35815_chip_reset(dev);
2929         spin_unlock_irqrestore(&lp->lock, flags);
2930         pci_set_power_state(pdev, PCI_D3hot);
2931         return 0;
2932 }
2933
2934 static int tc35815_resume(struct pci_dev *pdev)
2935 {
2936         struct net_device *dev = pci_get_drvdata(pdev);
2937         struct tc35815_local *lp = dev->priv;
2938         unsigned long flags;
2939
2940         pci_restore_state(pdev);
2941         if (!netif_running(dev))
2942                 return 0;
2943         pci_set_power_state(pdev, PCI_D0);
2944         spin_lock_irqsave(&lp->lock, flags);
2945         tc35815_restart(dev);
2946         spin_unlock_irqrestore(&lp->lock, flags);
2947         netif_device_attach(dev);
2948         return 0;
2949 }
2950 #endif /* CONFIG_PM */
2951
2952 static struct pci_driver tc35815_pci_driver = {
2953         .name           = MODNAME,
2954         .id_table       = tc35815_pci_tbl,
2955         .probe          = tc35815_init_one,
2956         .remove         = __devexit_p(tc35815_remove_one),
2957 #ifdef CONFIG_PM
2958         .suspend        = tc35815_suspend,
2959         .resume         = tc35815_resume,
2960 #endif
2961 };
2962
2963 module_param_named(speed, options.speed, int, 0);
2964 MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
2965 module_param_named(duplex, options.duplex, int, 0);
2966 MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
2967 module_param_named(doforce, options.doforce, int, 0);
2968 MODULE_PARM_DESC(doforce, "try force link mode if auto-negotiation failed");
2969
2970 static int __init tc35815_init_module(void)
2971 {
2972         return pci_register_driver(&tc35815_pci_driver);
2973 }
2974
2975 static void __exit tc35815_cleanup_module(void)
2976 {
2977         pci_unregister_driver(&tc35815_pci_driver);
2978 }
2979
2980 module_init(tc35815_init_module);
2981 module_exit(tc35815_cleanup_module);
2982
2983 MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
2984 MODULE_LICENSE("GPL");