drivers/net/tc35815.c

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