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Pull bugzilla-9429 into release branch
[pv_ops_mirror.git] / drivers / net / tc35815.c
blobd887c05588d5c4504d31699fef3d452645cb1daa
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 net_device_stats stats;
422 struct {
423 int max_tx_qlen;
424 int tx_ints;
425 int rx_ints;
426 int tx_underrun;
427 } lstats;
428
429 /* Tx control lock. This protects the transmit buffer ring
430 * state along with the "tx full" state of the driver. This
431 * means all netif_queue flow control actions are protected
432 * by this lock as well.
433 */
434 spinlock_t lock;
435
436 int phy_addr;
437 int fullduplex;
438 unsigned short saved_lpa;
439 struct timer_list timer;
440 enum tc35815_timer_state timer_state; /* State of auto-neg timer. */
441 unsigned int timer_ticks; /* Number of clicks at each state */
442
443 /*
444 * Transmitting: Batch Mode.
445 * 1 BD in 1 TxFD.
446 * Receiving: Packing Mode. (TC35815_USE_PACKEDBUFFER)
447 * 1 circular FD for Free Buffer List.
448 * RX_BUF_NUM BD in Free Buffer FD.
449 * One Free Buffer BD has PAGE_SIZE data buffer.
450 * Or Non-Packing Mode.
451 * 1 circular FD for Free Buffer List.
452 * RX_BUF_NUM BD in Free Buffer FD.
453 * One Free Buffer BD has ETH_FRAME_LEN data buffer.
454 */
455 void * fd_buf; /* for TxFD, RxFD, FrFD */
456 dma_addr_t fd_buf_dma;
457 struct TxFD *tfd_base;
458 unsigned int tfd_start;
459 unsigned int tfd_end;
460 struct RxFD *rfd_base;
461 struct RxFD *rfd_limit;
462 struct RxFD *rfd_cur;
463 struct FrFD *fbl_ptr;
464 #ifdef TC35815_USE_PACKEDBUFFER
465 unsigned char fbl_curid;
466 void * data_buf[RX_BUF_NUM]; /* packing */
467 dma_addr_t data_buf_dma[RX_BUF_NUM];
468 struct {
469 struct sk_buff *skb;
470 dma_addr_t skb_dma;
471 } tx_skbs[TX_FD_NUM];
472 #else
473 unsigned int fbl_count;
474 struct {
475 struct sk_buff *skb;
476 dma_addr_t skb_dma;
477 } tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
478 #endif
479 struct mii_if_info mii;
480 unsigned short mii_id[2];
481 u32 msg_enable;
482 board_t boardtype;
483 };
484
485 static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
486 {
487 return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
488 }
489 #ifdef DEBUG
490 static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
491 {
492 return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
493 }
494 #endif
495 #ifdef TC35815_USE_PACKEDBUFFER
496 static inline void *rxbuf_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
497 {
498 int i;
499 for (i = 0; i < RX_BUF_NUM; i++) {
500 if (bus >= lp->data_buf_dma[i] &&
501 bus < lp->data_buf_dma[i] + PAGE_SIZE)
502 return (void *)((u8 *)lp->data_buf[i] +
503 (bus - lp->data_buf_dma[i]));
504 }
505 return NULL;
506 }
507
508 #define TC35815_DMA_SYNC_ONDEMAND
509 static void* alloc_rxbuf_page(struct pci_dev *hwdev, dma_addr_t *dma_handle)
510 {
511 #ifdef TC35815_DMA_SYNC_ONDEMAND
512 void *buf;
513 /* pci_map + pci_dma_sync will be more effective than
514 * pci_alloc_consistent on some archs. */
515 if ((buf = (void *)__get_free_page(GFP_ATOMIC)) == NULL)
516 return NULL;
517 *dma_handle = pci_map_single(hwdev, buf, PAGE_SIZE,
518 PCI_DMA_FROMDEVICE);
519 if (pci_dma_mapping_error(*dma_handle)) {
520 free_page((unsigned long)buf);
521 return NULL;
522 }
523 return buf;
524 #else
525 return pci_alloc_consistent(hwdev, PAGE_SIZE, dma_handle);
526 #endif
527 }
528
529 static void free_rxbuf_page(struct pci_dev *hwdev, void *buf, dma_addr_t dma_handle)
530 {
531 #ifdef TC35815_DMA_SYNC_ONDEMAND
532 pci_unmap_single(hwdev, dma_handle, PAGE_SIZE, PCI_DMA_FROMDEVICE);
533 free_page((unsigned long)buf);
534 #else
535 pci_free_consistent(hwdev, PAGE_SIZE, buf, dma_handle);
536 #endif
537 }
538 #else /* TC35815_USE_PACKEDBUFFER */
539 static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
540 struct pci_dev *hwdev,
541 dma_addr_t *dma_handle)
542 {
543 struct sk_buff *skb;
544 skb = dev_alloc_skb(RX_BUF_SIZE);
545 if (!skb)
546 return NULL;
547 *dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
548 PCI_DMA_FROMDEVICE);
549 if (pci_dma_mapping_error(*dma_handle)) {
550 dev_kfree_skb_any(skb);
551 return NULL;
552 }
553 skb_reserve(skb, 2); /* make IP header 4byte aligned */
554 return skb;
555 }
556
557 static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
558 {
559 pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
560 PCI_DMA_FROMDEVICE);
561 dev_kfree_skb_any(skb);
562 }
563 #endif /* TC35815_USE_PACKEDBUFFER */
564
565 /* Index to functions, as function prototypes. */
566
567 static int tc35815_open(struct net_device *dev);
568 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
569 static irqreturn_t tc35815_interrupt(int irq, void *dev_id);
570 #ifdef TC35815_NAPI
571 static int tc35815_rx(struct net_device *dev, int limit);
572 static int tc35815_poll(struct napi_struct *napi, int budget);
573 #else
574 static void tc35815_rx(struct net_device *dev);
575 #endif
576 static void tc35815_txdone(struct net_device *dev);
577 static int tc35815_close(struct net_device *dev);
578 static struct net_device_stats *tc35815_get_stats(struct net_device *dev);
579 static void tc35815_set_multicast_list(struct net_device *dev);
580 static void tc35815_tx_timeout(struct net_device *dev);
581 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
582 #ifdef CONFIG_NET_POLL_CONTROLLER
583 static void tc35815_poll_controller(struct net_device *dev);
584 #endif
585 static const struct ethtool_ops tc35815_ethtool_ops;
586
587 /* Example routines you must write ;->. */
588 static void tc35815_chip_reset(struct net_device *dev);
589 static void tc35815_chip_init(struct net_device *dev);
590 static void tc35815_find_phy(struct net_device *dev);
591 static void tc35815_phy_chip_init(struct net_device *dev);
592
593 #ifdef DEBUG
594 static void panic_queues(struct net_device *dev);
595 #endif
596
597 static void tc35815_timer(unsigned long data);
598 static void tc35815_start_auto_negotiation(struct net_device *dev,
599 struct ethtool_cmd *ep);
600 static int tc_mdio_read(struct net_device *dev, int phy_id, int location);
601 static void tc_mdio_write(struct net_device *dev, int phy_id, int location,
602 int val);
603
604 #ifdef CONFIG_CPU_TX49XX
605 /*
606 * Find a platform_device providing a MAC address. The platform code
607 * should provide a "tc35815-mac" device with a MAC address in its
608 * platform_data.
609 */
610 static int __devinit tc35815_mac_match(struct device *dev, void *data)
611 {
612 struct platform_device *plat_dev = to_platform_device(dev);
613 struct pci_dev *pci_dev = data;
614 unsigned int id = (pci_dev->bus->number << 8) | pci_dev->devfn;
615 return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
616 }
617
618 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
619 {
620 struct tc35815_local *lp = dev->priv;
621 struct device *pd = bus_find_device(&platform_bus_type, NULL,
622 lp->pci_dev, tc35815_mac_match);
623 if (pd) {
624 if (pd->platform_data)
625 memcpy(dev->dev_addr, pd->platform_data, ETH_ALEN);
626 put_device(pd);
627 return is_valid_ether_addr(dev->dev_addr) ? 0 : -ENODEV;
628 }
629 return -ENODEV;
630 }
631 #else
632 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
633 {
634 return -ENODEV;
635 }
636 #endif
637
638 static int __devinit tc35815_init_dev_addr (struct net_device *dev)
639 {
640 struct tc35815_regs __iomem *tr =
641 (struct tc35815_regs __iomem *)dev->base_addr;
642 int i;
643
644 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
645 ;
646 for (i = 0; i < 6; i += 2) {
647 unsigned short data;
648 tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
649 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
650 ;
651 data = tc_readl(&tr->PROM_Data);
652 dev->dev_addr[i] = data & 0xff;
653 dev->dev_addr[i+1] = data >> 8;
654 }
655 if (!is_valid_ether_addr(dev->dev_addr))
656 return tc35815_read_plat_dev_addr(dev);
657 return 0;
658 }
659
660 static int __devinit tc35815_init_one (struct pci_dev *pdev,
661 const struct pci_device_id *ent)
662 {
663 void __iomem *ioaddr = NULL;
664 struct net_device *dev;
665 struct tc35815_local *lp;
666 int rc;
667 unsigned long mmio_start, mmio_end, mmio_flags, mmio_len;
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, "
775 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
776 "IRQ %d\n",
777 dev->name,
778 board_info[ent->driver_data].name,
779 dev->base_addr,
780 dev->dev_addr[0], dev->dev_addr[1],
781 dev->dev_addr[2], dev->dev_addr[3],
782 dev->dev_addr[4], dev->dev_addr[5],
783 dev->irq);
784
785 setup_timer(&lp->timer, tc35815_timer, (unsigned long) dev);
786 lp->mii.dev = dev;
787 lp->mii.mdio_read = tc_mdio_read;
788 lp->mii.mdio_write = tc_mdio_write;
789 lp->mii.phy_id_mask = 0x1f;
790 lp->mii.reg_num_mask = 0x1f;
791 tc35815_find_phy(dev);
792 lp->mii.phy_id = lp->phy_addr;
793 lp->mii.full_duplex = 0;
794 lp->mii.force_media = 0;
795
796 return 0;
797
798 err_out_unmap:
799 iounmap(ioaddr);
800 err_out_free_res:
801 pci_release_regions (pdev);
802 err_out:
803 free_netdev (dev);
804 return rc;
805 }
806
807
808 static void __devexit tc35815_remove_one (struct pci_dev *pdev)
809 {
810 struct net_device *dev = pci_get_drvdata (pdev);
811 unsigned long mmio_addr;
812
813 mmio_addr = dev->base_addr;
814
815 unregister_netdev (dev);
816
817 if (mmio_addr) {
818 iounmap ((void __iomem *)mmio_addr);
819 pci_release_regions (pdev);
820 }
821
822 free_netdev (dev);
823
824 pci_set_drvdata (pdev, NULL);
825 }
826
827 static int
828 tc35815_init_queues(struct net_device *dev)
829 {
830 struct tc35815_local *lp = dev->priv;
831 int i;
832 unsigned long fd_addr;
833
834 if (!lp->fd_buf) {
835 BUG_ON(sizeof(struct FDesc) +
836 sizeof(struct BDesc) * RX_BUF_NUM +
837 sizeof(struct FDesc) * RX_FD_NUM +
838 sizeof(struct TxFD) * TX_FD_NUM >
839 PAGE_SIZE * FD_PAGE_NUM);
840
841 if ((lp->fd_buf = pci_alloc_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM, &lp->fd_buf_dma)) == 0)
842 return -ENOMEM;
843 for (i = 0; i < RX_BUF_NUM; i++) {
844 #ifdef TC35815_USE_PACKEDBUFFER
845 if ((lp->data_buf[i] = alloc_rxbuf_page(lp->pci_dev, &lp->data_buf_dma[i])) == NULL) {
846 while (--i >= 0) {
847 free_rxbuf_page(lp->pci_dev,
848 lp->data_buf[i],
849 lp->data_buf_dma[i]);
850 lp->data_buf[i] = NULL;
851 }
852 pci_free_consistent(lp->pci_dev,
853 PAGE_SIZE * FD_PAGE_NUM,
854 lp->fd_buf,
855 lp->fd_buf_dma);
856 lp->fd_buf = NULL;
857 return -ENOMEM;
858 }
859 #else
860 lp->rx_skbs[i].skb =
861 alloc_rxbuf_skb(dev, lp->pci_dev,
862 &lp->rx_skbs[i].skb_dma);
863 if (!lp->rx_skbs[i].skb) {
864 while (--i >= 0) {
865 free_rxbuf_skb(lp->pci_dev,
866 lp->rx_skbs[i].skb,
867 lp->rx_skbs[i].skb_dma);
868 lp->rx_skbs[i].skb = NULL;
869 }
870 pci_free_consistent(lp->pci_dev,
871 PAGE_SIZE * FD_PAGE_NUM,
872 lp->fd_buf,
873 lp->fd_buf_dma);
874 lp->fd_buf = NULL;
875 return -ENOMEM;
876 }
877 #endif
878 }
879 printk(KERN_DEBUG "%s: FD buf %p DataBuf",
880 dev->name, lp->fd_buf);
881 #ifdef TC35815_USE_PACKEDBUFFER
882 printk(" DataBuf");
883 for (i = 0; i < RX_BUF_NUM; i++)
884 printk(" %p", lp->data_buf[i]);
885 #endif
886 printk("\n");
887 } else {
888 for (i = 0; i < FD_PAGE_NUM; i++) {
889 clear_page((void *)((unsigned long)lp->fd_buf + i * PAGE_SIZE));
890 }
891 }
892 fd_addr = (unsigned long)lp->fd_buf;
893
894 /* Free Descriptors (for Receive) */
895 lp->rfd_base = (struct RxFD *)fd_addr;
896 fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
897 for (i = 0; i < RX_FD_NUM; i++) {
898 lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
899 }
900 lp->rfd_cur = lp->rfd_base;
901 lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
902
903 /* Transmit Descriptors */
904 lp->tfd_base = (struct TxFD *)fd_addr;
905 fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
906 for (i = 0; i < TX_FD_NUM; i++) {
907 lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
908 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
909 lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
910 }
911 lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
912 lp->tfd_start = 0;
913 lp->tfd_end = 0;
914
915 /* Buffer List (for Receive) */
916 lp->fbl_ptr = (struct FrFD *)fd_addr;
917 lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
918 lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
919 #ifndef TC35815_USE_PACKEDBUFFER
920 /*
921 * move all allocated skbs to head of rx_skbs[] array.
922 * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
923 * tc35815_rx() had failed.
924 */
925 lp->fbl_count = 0;
926 for (i = 0; i < RX_BUF_NUM; i++) {
927 if (lp->rx_skbs[i].skb) {
928 if (i != lp->fbl_count) {
929 lp->rx_skbs[lp->fbl_count].skb =
930 lp->rx_skbs[i].skb;
931 lp->rx_skbs[lp->fbl_count].skb_dma =
932 lp->rx_skbs[i].skb_dma;
933 }
934 lp->fbl_count++;
935 }
936 }
937 #endif
938 for (i = 0; i < RX_BUF_NUM; i++) {
939 #ifdef TC35815_USE_PACKEDBUFFER
940 lp->fbl_ptr->bd[i].BuffData = cpu_to_le32(lp->data_buf_dma[i]);
941 #else
942 if (i >= lp->fbl_count) {
943 lp->fbl_ptr->bd[i].BuffData = 0;
944 lp->fbl_ptr->bd[i].BDCtl = 0;
945 continue;
946 }
947 lp->fbl_ptr->bd[i].BuffData =
948 cpu_to_le32(lp->rx_skbs[i].skb_dma);
949 #endif
950 /* BDID is index of FrFD.bd[] */
951 lp->fbl_ptr->bd[i].BDCtl =
952 cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
953 RX_BUF_SIZE);
954 }
955 #ifdef TC35815_USE_PACKEDBUFFER
956 lp->fbl_curid = 0;
957 #endif
958
959 printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
960 dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
961 return 0;
962 }
963
964 static void
965 tc35815_clear_queues(struct net_device *dev)
966 {
967 struct tc35815_local *lp = dev->priv;
968 int i;
969
970 for (i = 0; i < TX_FD_NUM; i++) {
971 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
972 struct sk_buff *skb =
973 fdsystem != 0xffffffff ?
974 lp->tx_skbs[fdsystem].skb : NULL;
975 #ifdef DEBUG
976 if (lp->tx_skbs[i].skb != skb) {
977 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
978 panic_queues(dev);
979 }
980 #else
981 BUG_ON(lp->tx_skbs[i].skb != skb);
982 #endif
983 if (skb) {
984 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
985 lp->tx_skbs[i].skb = NULL;
986 lp->tx_skbs[i].skb_dma = 0;
987 dev_kfree_skb_any(skb);
988 }
989 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
990 }
991
992 tc35815_init_queues(dev);
993 }
994
995 static void
996 tc35815_free_queues(struct net_device *dev)
997 {
998 struct tc35815_local *lp = dev->priv;
999 int i;
1000
1001 if (lp->tfd_base) {
1002 for (i = 0; i < TX_FD_NUM; i++) {
1003 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1004 struct sk_buff *skb =
1005 fdsystem != 0xffffffff ?
1006 lp->tx_skbs[fdsystem].skb : NULL;
1007 #ifdef DEBUG
1008 if (lp->tx_skbs[i].skb != skb) {
1009 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1010 panic_queues(dev);
1011 }
1012 #else
1013 BUG_ON(lp->tx_skbs[i].skb != skb);
1014 #endif
1015 if (skb) {
1016 dev_kfree_skb(skb);
1017 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1018 lp->tx_skbs[i].skb = NULL;
1019 lp->tx_skbs[i].skb_dma = 0;
1020 }
1021 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1022 }
1023 }
1024
1025 lp->rfd_base = NULL;
1026 lp->rfd_limit = NULL;
1027 lp->rfd_cur = NULL;
1028 lp->fbl_ptr = NULL;
1029
1030 for (i = 0; i < RX_BUF_NUM; i++) {
1031 #ifdef TC35815_USE_PACKEDBUFFER
1032 if (lp->data_buf[i]) {
1033 free_rxbuf_page(lp->pci_dev,
1034 lp->data_buf[i], lp->data_buf_dma[i]);
1035 lp->data_buf[i] = NULL;
1036 }
1037 #else
1038 if (lp->rx_skbs[i].skb) {
1039 free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
1040 lp->rx_skbs[i].skb_dma);
1041 lp->rx_skbs[i].skb = NULL;
1042 }
1043 #endif
1044 }
1045 if (lp->fd_buf) {
1046 pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
1047 lp->fd_buf, lp->fd_buf_dma);
1048 lp->fd_buf = NULL;
1049 }
1050 }
1051
1052 static void
1053 dump_txfd(struct TxFD *fd)
1054 {
1055 printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
1056 le32_to_cpu(fd->fd.FDNext),
1057 le32_to_cpu(fd->fd.FDSystem),
1058 le32_to_cpu(fd->fd.FDStat),
1059 le32_to_cpu(fd->fd.FDCtl));
1060 printk("BD: ");
1061 printk(" %08x %08x",
1062 le32_to_cpu(fd->bd.BuffData),
1063 le32_to_cpu(fd->bd.BDCtl));
1064 printk("\n");
1065 }
1066
1067 static int
1068 dump_rxfd(struct RxFD *fd)
1069 {
1070 int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1071 if (bd_count > 8)
1072 bd_count = 8;
1073 printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
1074 le32_to_cpu(fd->fd.FDNext),
1075 le32_to_cpu(fd->fd.FDSystem),
1076 le32_to_cpu(fd->fd.FDStat),
1077 le32_to_cpu(fd->fd.FDCtl));
1078 if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
1079 return 0;
1080 printk("BD: ");
1081 for (i = 0; i < bd_count; i++)
1082 printk(" %08x %08x",
1083 le32_to_cpu(fd->bd[i].BuffData),
1084 le32_to_cpu(fd->bd[i].BDCtl));
1085 printk("\n");
1086 return bd_count;
1087 }
1088
1089 #if defined(DEBUG) || defined(TC35815_USE_PACKEDBUFFER)
1090 static void
1091 dump_frfd(struct FrFD *fd)
1092 {
1093 int i;
1094 printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
1095 le32_to_cpu(fd->fd.FDNext),
1096 le32_to_cpu(fd->fd.FDSystem),
1097 le32_to_cpu(fd->fd.FDStat),
1098 le32_to_cpu(fd->fd.FDCtl));
1099 printk("BD: ");
1100 for (i = 0; i < RX_BUF_NUM; i++)
1101 printk(" %08x %08x",
1102 le32_to_cpu(fd->bd[i].BuffData),
1103 le32_to_cpu(fd->bd[i].BDCtl));
1104 printk("\n");
1105 }
1106 #endif
1107
1108 #ifdef DEBUG
1109 static void
1110 panic_queues(struct net_device *dev)
1111 {
1112 struct tc35815_local *lp = dev->priv;
1113 int i;
1114
1115 printk("TxFD base %p, start %u, end %u\n",
1116 lp->tfd_base, lp->tfd_start, lp->tfd_end);
1117 printk("RxFD base %p limit %p cur %p\n",
1118 lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
1119 printk("FrFD %p\n", lp->fbl_ptr);
1120 for (i = 0; i < TX_FD_NUM; i++)
1121 dump_txfd(&lp->tfd_base[i]);
1122 for (i = 0; i < RX_FD_NUM; i++) {
1123 int bd_count = dump_rxfd(&lp->rfd_base[i]);
1124 i += (bd_count + 1) / 2; /* skip BDs */
1125 }
1126 dump_frfd(lp->fbl_ptr);
1127 panic("%s: Illegal queue state.", dev->name);
1128 }
1129 #endif
1130
1131 static void print_eth(char *add)
1132 {
1133 int i;
1134
1135 printk("print_eth(%p)\n", add);
1136 for (i = 0; i < 6; i++)
1137 printk(" %2.2X", (unsigned char) add[i + 6]);
1138 printk(" =>");
1139 for (i = 0; i < 6; i++)
1140 printk(" %2.2X", (unsigned char) add[i]);
1141 printk(" : %2.2X%2.2X\n", (unsigned char) add[12], (unsigned char) add[13]);
1142 }
1143
1144 static int tc35815_tx_full(struct net_device *dev)
1145 {
1146 struct tc35815_local *lp = dev->priv;
1147 return ((lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end);
1148 }
1149
1150 static void tc35815_restart(struct net_device *dev)
1151 {
1152 struct tc35815_local *lp = dev->priv;
1153 int pid = lp->phy_addr;
1154 int do_phy_reset = 1;
1155 del_timer(&lp->timer); /* Kill if running */
1156
1157 if (lp->mii_id[0] == 0x0016 && (lp->mii_id[1] & 0xfc00) == 0xf800) {
1158 /* Resetting PHY cause problem on some chip... (SEEQ 80221) */
1159 do_phy_reset = 0;
1160 }
1161 if (do_phy_reset) {
1162 int timeout;
1163 tc_mdio_write(dev, pid, MII_BMCR, BMCR_RESET);
1164 timeout = 100;
1165 while (--timeout) {
1166 if (!(tc_mdio_read(dev, pid, MII_BMCR) & BMCR_RESET))
1167 break;
1168 udelay(1);
1169 }
1170 if (!timeout)
1171 printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
1172 }
1173
1174 tc35815_chip_reset(dev);
1175 tc35815_clear_queues(dev);
1176 tc35815_chip_init(dev);
1177 /* Reconfigure CAM again since tc35815_chip_init() initialize it. */
1178 tc35815_set_multicast_list(dev);
1179 }
1180
1181 static void tc35815_tx_timeout(struct net_device *dev)
1182 {
1183 struct tc35815_local *lp = dev->priv;
1184 struct tc35815_regs __iomem *tr =
1185 (struct tc35815_regs __iomem *)dev->base_addr;
1186
1187 printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
1188 dev->name, tc_readl(&tr->Tx_Stat));
1189
1190 /* Try to restart the adaptor. */
1191 spin_lock_irq(&lp->lock);
1192 tc35815_restart(dev);
1193 spin_unlock_irq(&lp->lock);
1194
1195 lp->stats.tx_errors++;
1196
1197 /* If we have space available to accept new transmit
1198 * requests, wake up the queueing layer. This would
1199 * be the case if the chipset_init() call above just
1200 * flushes out the tx queue and empties it.
1201 *
1202 * If instead, the tx queue is retained then the
1203 * netif_wake_queue() call should be placed in the
1204 * TX completion interrupt handler of the driver instead
1205 * of here.
1206 */
1207 if (!tc35815_tx_full(dev))
1208 netif_wake_queue(dev);
1209 }
1210
1211 /*
1212 * Open/initialize the board. This is called (in the current kernel)
1213 * sometime after booting when the 'ifconfig' program is run.
1214 *
1215 * This routine should set everything up anew at each open, even
1216 * registers that "should" only need to be set once at boot, so that
1217 * there is non-reboot way to recover if something goes wrong.
1218 */
1219 static int
1220 tc35815_open(struct net_device *dev)
1221 {
1222 struct tc35815_local *lp = dev->priv;
1223
1224 /*
1225 * This is used if the interrupt line can turned off (shared).
1226 * See 3c503.c for an example of selecting the IRQ at config-time.
1227 */
1228 if (request_irq(dev->irq, &tc35815_interrupt, IRQF_SHARED, dev->name, dev)) {
1229 return -EAGAIN;
1230 }
1231
1232 del_timer(&lp->timer); /* Kill if running */
1233 tc35815_chip_reset(dev);
1234
1235 if (tc35815_init_queues(dev) != 0) {
1236 free_irq(dev->irq, dev);
1237 return -EAGAIN;
1238 }
1239
1240 #ifdef TC35815_NAPI
1241 napi_enable(&lp->napi);
1242 #endif
1243
1244 /* Reset the hardware here. Don't forget to set the station address. */
1245 spin_lock_irq(&lp->lock);
1246 tc35815_chip_init(dev);
1247 spin_unlock_irq(&lp->lock);
1248
1249 /* We are now ready to accept transmit requeusts from
1250 * the queueing layer of the networking.
1251 */
1252 netif_start_queue(dev);
1253
1254 return 0;
1255 }
1256
1257 /* This will only be invoked if your driver is _not_ in XOFF state.
1258 * What this means is that you need not check it, and that this
1259 * invariant will hold if you make sure that the netif_*_queue()
1260 * calls are done at the proper times.
1261 */
1262 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
1263 {
1264 struct tc35815_local *lp = dev->priv;
1265 struct TxFD *txfd;
1266 unsigned long flags;
1267
1268 /* If some error occurs while trying to transmit this
1269 * packet, you should return '1' from this function.
1270 * In such a case you _may not_ do anything to the
1271 * SKB, it is still owned by the network queueing
1272 * layer when an error is returned. This means you
1273 * may not modify any SKB fields, you may not free
1274 * the SKB, etc.
1275 */
1276
1277 /* This is the most common case for modern hardware.
1278 * The spinlock protects this code from the TX complete
1279 * hardware interrupt handler. Queue flow control is
1280 * thus managed under this lock as well.
1281 */
1282 spin_lock_irqsave(&lp->lock, flags);
1283
1284 /* failsafe... (handle txdone now if half of FDs are used) */
1285 if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
1286 TX_FD_NUM / 2)
1287 tc35815_txdone(dev);
1288
1289 if (netif_msg_pktdata(lp))
1290 print_eth(skb->data);
1291 #ifdef DEBUG
1292 if (lp->tx_skbs[lp->tfd_start].skb) {
1293 printk("%s: tx_skbs conflict.\n", dev->name);
1294 panic_queues(dev);
1295 }
1296 #else
1297 BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
1298 #endif
1299 lp->tx_skbs[lp->tfd_start].skb = skb;
1300 lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1301
1302 /*add to ring */
1303 txfd = &lp->tfd_base[lp->tfd_start];
1304 txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
1305 txfd->bd.BDCtl = cpu_to_le32(skb->len);
1306 txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
1307 txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
1308
1309 if (lp->tfd_start == lp->tfd_end) {
1310 struct tc35815_regs __iomem *tr =
1311 (struct tc35815_regs __iomem *)dev->base_addr;
1312 /* Start DMA Transmitter. */
1313 txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1314 #ifdef GATHER_TXINT
1315 txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1316 #endif
1317 if (netif_msg_tx_queued(lp)) {
1318 printk("%s: starting TxFD.\n", dev->name);
1319 dump_txfd(txfd);
1320 }
1321 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1322 } else {
1323 txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
1324 if (netif_msg_tx_queued(lp)) {
1325 printk("%s: queueing TxFD.\n", dev->name);
1326 dump_txfd(txfd);
1327 }
1328 }
1329 lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
1330
1331 dev->trans_start = jiffies;
1332
1333 /* If we just used up the very last entry in the
1334 * TX ring on this device, tell the queueing
1335 * layer to send no more.
1336 */
1337 if (tc35815_tx_full(dev)) {
1338 if (netif_msg_tx_queued(lp))
1339 printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
1340 netif_stop_queue(dev);
1341 }
1342
1343 /* When the TX completion hw interrupt arrives, this
1344 * is when the transmit statistics are updated.
1345 */
1346
1347 spin_unlock_irqrestore(&lp->lock, flags);
1348 return 0;
1349 }
1350
1351 #define FATAL_ERROR_INT \
1352 (Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
1353 static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
1354 {
1355 static int count;
1356 printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
1357 dev->name, status);
1358 if (status & Int_IntPCI)
1359 printk(" IntPCI");
1360 if (status & Int_DmParErr)
1361 printk(" DmParErr");
1362 if (status & Int_IntNRAbt)
1363 printk(" IntNRAbt");
1364 printk("\n");
1365 if (count++ > 100)
1366 panic("%s: Too many fatal errors.", dev->name);
1367 printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
1368 /* Try to restart the adaptor. */
1369 tc35815_restart(dev);
1370 }
1371
1372 #ifdef TC35815_NAPI
1373 static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
1374 #else
1375 static int tc35815_do_interrupt(struct net_device *dev, u32 status)
1376 #endif
1377 {
1378 struct tc35815_local *lp = dev->priv;
1379 struct tc35815_regs __iomem *tr =
1380 (struct tc35815_regs __iomem *)dev->base_addr;
1381 int ret = -1;
1382
1383 /* Fatal errors... */
1384 if (status & FATAL_ERROR_INT) {
1385 tc35815_fatal_error_interrupt(dev, status);
1386 return 0;
1387 }
1388 /* recoverable errors */
1389 if (status & Int_IntFDAEx) {
1390 /* disable FDAEx int. (until we make rooms...) */
1391 tc_writel(tc_readl(&tr->Int_En) & ~Int_FDAExEn, &tr->Int_En);
1392 printk(KERN_WARNING
1393 "%s: Free Descriptor Area Exhausted (%#x).\n",
1394 dev->name, status);
1395 lp->stats.rx_dropped++;
1396 ret = 0;
1397 }
1398 if (status & Int_IntBLEx) {
1399 /* disable BLEx int. (until we make rooms...) */
1400 tc_writel(tc_readl(&tr->Int_En) & ~Int_BLExEn, &tr->Int_En);
1401 printk(KERN_WARNING
1402 "%s: Buffer List Exhausted (%#x).\n",
1403 dev->name, status);
1404 lp->stats.rx_dropped++;
1405 ret = 0;
1406 }
1407 if (status & Int_IntExBD) {
1408 printk(KERN_WARNING
1409 "%s: Excessive Buffer Descriptiors (%#x).\n",
1410 dev->name, status);
1411 lp->stats.rx_length_errors++;
1412 ret = 0;
1413 }
1414
1415 /* normal notification */
1416 if (status & Int_IntMacRx) {
1417 /* Got a packet(s). */
1418 #ifdef TC35815_NAPI
1419 ret = tc35815_rx(dev, limit);
1420 #else
1421 tc35815_rx(dev);
1422 ret = 0;
1423 #endif
1424 lp->lstats.rx_ints++;
1425 }
1426 if (status & Int_IntMacTx) {
1427 /* Transmit complete. */
1428 lp->lstats.tx_ints++;
1429 tc35815_txdone(dev);
1430 netif_wake_queue(dev);
1431 ret = 0;
1432 }
1433 return ret;
1434 }
1435
1436 /*
1437 * The typical workload of the driver:
1438 * Handle the network interface interrupts.
1439 */
1440 static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
1441 {
1442 struct net_device *dev = dev_id;
1443 struct tc35815_local *lp = netdev_priv(dev);
1444 struct tc35815_regs __iomem *tr =
1445 (struct tc35815_regs __iomem *)dev->base_addr;
1446 #ifdef TC35815_NAPI
1447 u32 dmactl = tc_readl(&tr->DMA_Ctl);
1448
1449 if (!(dmactl & DMA_IntMask)) {
1450 /* disable interrupts */
1451 tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
1452 if (netif_rx_schedule_prep(dev, &lp->napi))
1453 __netif_rx_schedule(dev, &lp->napi);
1454 else {
1455 printk(KERN_ERR "%s: interrupt taken in poll\n",
1456 dev->name);
1457 BUG();
1458 }
1459 (void)tc_readl(&tr->Int_Src); /* flush */
1460 return IRQ_HANDLED;
1461 }
1462 return IRQ_NONE;
1463 #else
1464 int handled;
1465 u32 status;
1466
1467 spin_lock(&lp->lock);
1468 status = tc_readl(&tr->Int_Src);
1469 tc_writel(status, &tr->Int_Src); /* write to clear */
1470 handled = tc35815_do_interrupt(dev, status);
1471 (void)tc_readl(&tr->Int_Src); /* flush */
1472 spin_unlock(&lp->lock);
1473 return IRQ_RETVAL(handled >= 0);
1474 #endif /* TC35815_NAPI */
1475 }
1476
1477 #ifdef CONFIG_NET_POLL_CONTROLLER
1478 static void tc35815_poll_controller(struct net_device *dev)
1479 {
1480 disable_irq(dev->irq);
1481 tc35815_interrupt(dev->irq, dev);
1482 enable_irq(dev->irq);
1483 }
1484 #endif
1485
1486 /* We have a good packet(s), get it/them out of the buffers. */
1487 #ifdef TC35815_NAPI
1488 static int
1489 tc35815_rx(struct net_device *dev, int limit)
1490 #else
1491 static void
1492 tc35815_rx(struct net_device *dev)
1493 #endif
1494 {
1495 struct tc35815_local *lp = dev->priv;
1496 unsigned int fdctl;
1497 int i;
1498 int buf_free_count = 0;
1499 int fd_free_count = 0;
1500 #ifdef TC35815_NAPI
1501 int received = 0;
1502 #endif
1503
1504 while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
1505 int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
1506 int pkt_len = fdctl & FD_FDLength_MASK;
1507 int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1508 #ifdef DEBUG
1509 struct RxFD *next_rfd;
1510 #endif
1511 #if (RX_CTL_CMD & Rx_StripCRC) == 0
1512 pkt_len -= 4;
1513 #endif
1514
1515 if (netif_msg_rx_status(lp))
1516 dump_rxfd(lp->rfd_cur);
1517 if (status & Rx_Good) {
1518 struct sk_buff *skb;
1519 unsigned char *data;
1520 int cur_bd;
1521 #ifdef TC35815_USE_PACKEDBUFFER
1522 int offset;
1523 #endif
1524
1525 #ifdef TC35815_NAPI
1526 if (--limit < 0)
1527 break;
1528 #endif
1529 #ifdef TC35815_USE_PACKEDBUFFER
1530 BUG_ON(bd_count > 2);
1531 skb = dev_alloc_skb(pkt_len + 2); /* +2: for reserve */
1532 if (skb == NULL) {
1533 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
1534 dev->name);
1535 lp->stats.rx_dropped++;
1536 break;
1537 }
1538 skb_reserve(skb, 2); /* 16 bit alignment */
1539
1540 data = skb_put(skb, pkt_len);
1541
1542 /* copy from receive buffer */
1543 cur_bd = 0;
1544 offset = 0;
1545 while (offset < pkt_len && cur_bd < bd_count) {
1546 int len = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BDCtl) &
1547 BD_BuffLength_MASK;
1548 dma_addr_t dma = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BuffData);
1549 void *rxbuf = rxbuf_bus_to_virt(lp, dma);
1550 if (offset + len > pkt_len)
1551 len = pkt_len - offset;
1552 #ifdef TC35815_DMA_SYNC_ONDEMAND
1553 pci_dma_sync_single_for_cpu(lp->pci_dev,
1554 dma, len,
1555 PCI_DMA_FROMDEVICE);
1556 #endif
1557 memcpy(data + offset, rxbuf, len);
1558 #ifdef TC35815_DMA_SYNC_ONDEMAND
1559 pci_dma_sync_single_for_device(lp->pci_dev,
1560 dma, len,
1561 PCI_DMA_FROMDEVICE);
1562 #endif
1563 offset += len;
1564 cur_bd++;
1565 }
1566 #else /* TC35815_USE_PACKEDBUFFER */
1567 BUG_ON(bd_count > 1);
1568 cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
1569 & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1570 #ifdef DEBUG
1571 if (cur_bd >= RX_BUF_NUM) {
1572 printk("%s: invalid BDID.\n", dev->name);
1573 panic_queues(dev);
1574 }
1575 BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
1576 (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
1577 if (!lp->rx_skbs[cur_bd].skb) {
1578 printk("%s: NULL skb.\n", dev->name);
1579 panic_queues(dev);
1580 }
1581 #else
1582 BUG_ON(cur_bd >= RX_BUF_NUM);
1583 #endif
1584 skb = lp->rx_skbs[cur_bd].skb;
1585 prefetch(skb->data);
1586 lp->rx_skbs[cur_bd].skb = NULL;
1587 lp->fbl_count--;
1588 pci_unmap_single(lp->pci_dev,
1589 lp->rx_skbs[cur_bd].skb_dma,
1590 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1591 if (!HAVE_DMA_RXALIGN(lp))
1592 memmove(skb->data, skb->data - 2, pkt_len);
1593 data = skb_put(skb, pkt_len);
1594 #endif /* TC35815_USE_PACKEDBUFFER */
1595 if (netif_msg_pktdata(lp))
1596 print_eth(data);
1597 skb->protocol = eth_type_trans(skb, dev);
1598 #ifdef TC35815_NAPI
1599 netif_receive_skb(skb);
1600 received++;
1601 #else
1602 netif_rx(skb);
1603 #endif
1604 dev->last_rx = jiffies;
1605 lp->stats.rx_packets++;
1606 lp->stats.rx_bytes += pkt_len;
1607 } else {
1608 lp->stats.rx_errors++;
1609 printk(KERN_DEBUG "%s: Rx error (status %x)\n",
1610 dev->name, status & Rx_Stat_Mask);
1611 /* WORKAROUND: LongErr and CRCErr means Overflow. */
1612 if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
1613 status &= ~(Rx_LongErr|Rx_CRCErr);
1614 status |= Rx_Over;
1615 }
1616 if (status & Rx_LongErr) lp->stats.rx_length_errors++;
1617 if (status & Rx_Over) lp->stats.rx_fifo_errors++;
1618 if (status & Rx_CRCErr) lp->stats.rx_crc_errors++;
1619 if (status & Rx_Align) lp->stats.rx_frame_errors++;
1620 }
1621
1622 if (bd_count > 0) {
1623 /* put Free Buffer back to controller */
1624 int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
1625 unsigned char id =
1626 (bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1627 #ifdef DEBUG
1628 if (id >= RX_BUF_NUM) {
1629 printk("%s: invalid BDID.\n", dev->name);
1630 panic_queues(dev);
1631 }
1632 #else
1633 BUG_ON(id >= RX_BUF_NUM);
1634 #endif
1635 /* free old buffers */
1636 #ifdef TC35815_USE_PACKEDBUFFER
1637 while (lp->fbl_curid != id)
1638 #else
1639 while (lp->fbl_count < RX_BUF_NUM)
1640 #endif
1641 {
1642 #ifdef TC35815_USE_PACKEDBUFFER
1643 unsigned char curid = lp->fbl_curid;
1644 #else
1645 unsigned char curid =
1646 (id + 1 + lp->fbl_count) % RX_BUF_NUM;
1647 #endif
1648 struct BDesc *bd = &lp->fbl_ptr->bd[curid];
1649 #ifdef DEBUG
1650 bdctl = le32_to_cpu(bd->BDCtl);
1651 if (bdctl & BD_CownsBD) {
1652 printk("%s: Freeing invalid BD.\n",
1653 dev->name);
1654 panic_queues(dev);
1655 }
1656 #endif
1657 /* pass BD to controller */
1658 #ifndef TC35815_USE_PACKEDBUFFER
1659 if (!lp->rx_skbs[curid].skb) {
1660 lp->rx_skbs[curid].skb =
1661 alloc_rxbuf_skb(dev,
1662 lp->pci_dev,
1663 &lp->rx_skbs[curid].skb_dma);
1664 if (!lp->rx_skbs[curid].skb)
1665 break; /* try on next reception */
1666 bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
1667 }
1668 #endif /* TC35815_USE_PACKEDBUFFER */
1669 /* Note: BDLength was modified by chip. */
1670 bd->BDCtl = cpu_to_le32(BD_CownsBD |
1671 (curid << BD_RxBDID_SHIFT) |
1672 RX_BUF_SIZE);
1673 #ifdef TC35815_USE_PACKEDBUFFER
1674 lp->fbl_curid = (curid + 1) % RX_BUF_NUM;
1675 if (netif_msg_rx_status(lp)) {
1676 printk("%s: Entering new FBD %d\n",
1677 dev->name, lp->fbl_curid);
1678 dump_frfd(lp->fbl_ptr);
1679 }
1680 #else
1681 lp->fbl_count++;
1682 #endif
1683 buf_free_count++;
1684 }
1685 }
1686
1687 /* put RxFD back to controller */
1688 #ifdef DEBUG
1689 next_rfd = fd_bus_to_virt(lp,
1690 le32_to_cpu(lp->rfd_cur->fd.FDNext));
1691 if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
1692 printk("%s: RxFD FDNext invalid.\n", dev->name);
1693 panic_queues(dev);
1694 }
1695 #endif
1696 for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
1697 /* pass FD to controller */
1698 #ifdef DEBUG
1699 lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
1700 #else
1701 lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
1702 #endif
1703 lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
1704 lp->rfd_cur++;
1705 fd_free_count++;
1706 }
1707 if (lp->rfd_cur > lp->rfd_limit)
1708 lp->rfd_cur = lp->rfd_base;
1709 #ifdef DEBUG
1710 if (lp->rfd_cur != next_rfd)
1711 printk("rfd_cur = %p, next_rfd %p\n",
1712 lp->rfd_cur, next_rfd);
1713 #endif
1714 }
1715
1716 /* re-enable BL/FDA Exhaust interrupts. */
1717 if (fd_free_count) {
1718 struct tc35815_regs __iomem *tr =
1719 (struct tc35815_regs __iomem *)dev->base_addr;
1720 u32 en, en_old = tc_readl(&tr->Int_En);
1721 en = en_old | Int_FDAExEn;
1722 if (buf_free_count)
1723 en |= Int_BLExEn;
1724 if (en != en_old)
1725 tc_writel(en, &tr->Int_En);
1726 }
1727 #ifdef TC35815_NAPI
1728 return received;
1729 #endif
1730 }
1731
1732 #ifdef TC35815_NAPI
1733 static int tc35815_poll(struct napi_struct *napi, int budget)
1734 {
1735 struct tc35815_local *lp = container_of(napi, struct tc35815_local, napi);
1736 struct net_device *dev = lp->dev;
1737 struct tc35815_regs __iomem *tr =
1738 (struct tc35815_regs __iomem *)dev->base_addr;
1739 int received = 0, handled;
1740 u32 status;
1741
1742 spin_lock(&lp->lock);
1743 status = tc_readl(&tr->Int_Src);
1744 do {
1745 tc_writel(status, &tr->Int_Src); /* write to clear */
1746
1747 handled = tc35815_do_interrupt(dev, status, limit);
1748 if (handled >= 0) {
1749 received += handled;
1750 if (received >= budget)
1751 break;
1752 }
1753 status = tc_readl(&tr->Int_Src);
1754 } while (status);
1755 spin_unlock(&lp->lock);
1756
1757 if (received < budget) {
1758 netif_rx_complete(dev, napi);
1759 /* enable interrupts */
1760 tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
1761 }
1762 return received;
1763 }
1764 #endif
1765
1766 #ifdef NO_CHECK_CARRIER
1767 #define TX_STA_ERR (Tx_ExColl|Tx_Under|Tx_Defer|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1768 #else
1769 #define TX_STA_ERR (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1770 #endif
1771
1772 static void
1773 tc35815_check_tx_stat(struct net_device *dev, int status)
1774 {
1775 struct tc35815_local *lp = dev->priv;
1776 const char *msg = NULL;
1777
1778 /* count collisions */
1779 if (status & Tx_ExColl)
1780 lp->stats.collisions += 16;
1781 if (status & Tx_TxColl_MASK)
1782 lp->stats.collisions += status & Tx_TxColl_MASK;
1783
1784 #ifndef NO_CHECK_CARRIER
1785 /* TX4939 does not have NCarr */
1786 if (lp->boardtype == TC35815_TX4939)
1787 status &= ~Tx_NCarr;
1788 #ifdef WORKAROUND_LOSTCAR
1789 /* WORKAROUND: ignore LostCrS in full duplex operation */
1790 if ((lp->timer_state != asleep && lp->timer_state != lcheck)
1791 || lp->fullduplex)
1792 status &= ~Tx_NCarr;
1793 #endif
1794 #endif
1795
1796 if (!(status & TX_STA_ERR)) {
1797 /* no error. */
1798 lp->stats.tx_packets++;
1799 return;
1800 }
1801
1802 lp->stats.tx_errors++;
1803 if (status & Tx_ExColl) {
1804 lp->stats.tx_aborted_errors++;
1805 msg = "Excessive Collision.";
1806 }
1807 if (status & Tx_Under) {
1808 lp->stats.tx_fifo_errors++;
1809 msg = "Tx FIFO Underrun.";
1810 if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
1811 lp->lstats.tx_underrun++;
1812 if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
1813 struct tc35815_regs __iomem *tr =
1814 (struct tc35815_regs __iomem *)dev->base_addr;
1815 tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
1816 msg = "Tx FIFO Underrun.Change Tx threshold to max.";
1817 }
1818 }
1819 }
1820 if (status & Tx_Defer) {
1821 lp->stats.tx_fifo_errors++;
1822 msg = "Excessive Deferral.";
1823 }
1824 #ifndef NO_CHECK_CARRIER
1825 if (status & Tx_NCarr) {
1826 lp->stats.tx_carrier_errors++;
1827 msg = "Lost Carrier Sense.";
1828 }
1829 #endif
1830 if (status & Tx_LateColl) {
1831 lp->stats.tx_aborted_errors++;
1832 msg = "Late Collision.";
1833 }
1834 if (status & Tx_TxPar) {
1835 lp->stats.tx_fifo_errors++;
1836 msg = "Transmit Parity Error.";
1837 }
1838 if (status & Tx_SQErr) {
1839 lp->stats.tx_heartbeat_errors++;
1840 msg = "Signal Quality Error.";
1841 }
1842 if (msg && netif_msg_tx_err(lp))
1843 printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
1844 }
1845
1846 /* This handles TX complete events posted by the device
1847 * via interrupts.
1848 */
1849 static void
1850 tc35815_txdone(struct net_device *dev)
1851 {
1852 struct tc35815_local *lp = dev->priv;
1853 struct TxFD *txfd;
1854 unsigned int fdctl;
1855
1856 txfd = &lp->tfd_base[lp->tfd_end];
1857 while (lp->tfd_start != lp->tfd_end &&
1858 !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
1859 int status = le32_to_cpu(txfd->fd.FDStat);
1860 struct sk_buff *skb;
1861 unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
1862 u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
1863
1864 if (netif_msg_tx_done(lp)) {
1865 printk("%s: complete TxFD.\n", dev->name);
1866 dump_txfd(txfd);
1867 }
1868 tc35815_check_tx_stat(dev, status);
1869
1870 skb = fdsystem != 0xffffffff ?
1871 lp->tx_skbs[fdsystem].skb : NULL;
1872 #ifdef DEBUG
1873 if (lp->tx_skbs[lp->tfd_end].skb != skb) {
1874 printk("%s: tx_skbs mismatch.\n", dev->name);
1875 panic_queues(dev);
1876 }
1877 #else
1878 BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
1879 #endif
1880 if (skb) {
1881 lp->stats.tx_bytes += skb->len;
1882 pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
1883 lp->tx_skbs[lp->tfd_end].skb = NULL;
1884 lp->tx_skbs[lp->tfd_end].skb_dma = 0;
1885 #ifdef TC35815_NAPI
1886 dev_kfree_skb_any(skb);
1887 #else
1888 dev_kfree_skb_irq(skb);
1889 #endif
1890 }
1891 txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
1892
1893 lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
1894 txfd = &lp->tfd_base[lp->tfd_end];
1895 #ifdef DEBUG
1896 if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
1897 printk("%s: TxFD FDNext invalid.\n", dev->name);
1898 panic_queues(dev);
1899 }
1900 #endif
1901 if (fdnext & FD_Next_EOL) {
1902 /* DMA Transmitter has been stopping... */
1903 if (lp->tfd_end != lp->tfd_start) {
1904 struct tc35815_regs __iomem *tr =
1905 (struct tc35815_regs __iomem *)dev->base_addr;
1906 int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
1907 struct TxFD* txhead = &lp->tfd_base[head];
1908 int qlen = (lp->tfd_start + TX_FD_NUM
1909 - lp->tfd_end) % TX_FD_NUM;
1910
1911 #ifdef DEBUG
1912 if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
1913 printk("%s: TxFD FDCtl invalid.\n", dev->name);
1914 panic_queues(dev);
1915 }
1916 #endif
1917 /* log max queue length */
1918 if (lp->lstats.max_tx_qlen < qlen)
1919 lp->lstats.max_tx_qlen = qlen;
1920
1921
1922 /* start DMA Transmitter again */
1923 txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1924 #ifdef GATHER_TXINT
1925 txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1926 #endif
1927 if (netif_msg_tx_queued(lp)) {
1928 printk("%s: start TxFD on queue.\n",
1929 dev->name);
1930 dump_txfd(txfd);
1931 }
1932 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1933 }
1934 break;
1935 }
1936 }
1937
1938 /* If we had stopped the queue due to a "tx full"
1939 * condition, and space has now been made available,
1940 * wake up the queue.
1941 */
1942 if (netif_queue_stopped(dev) && ! tc35815_tx_full(dev))
1943 netif_wake_queue(dev);
1944 }
1945
1946 /* The inverse routine to tc35815_open(). */
1947 static int
1948 tc35815_close(struct net_device *dev)
1949 {
1950 struct tc35815_local *lp = dev->priv;
1951
1952 netif_stop_queue(dev);
1953 #ifdef TC35815_NAPI
1954 napi_disable(&lp->napi);
1955 #endif
1956
1957 /* Flush the Tx and disable Rx here. */
1958
1959 del_timer(&lp->timer); /* Kill if running */
1960 tc35815_chip_reset(dev);
1961 free_irq(dev->irq, dev);
1962
1963 tc35815_free_queues(dev);
1964
1965 return 0;
1966
1967 }
1968
1969 /*
1970 * Get the current statistics.
1971 * This may be called with the card open or closed.
1972 */
1973 static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
1974 {
1975 struct tc35815_local *lp = dev->priv;
1976 struct tc35815_regs __iomem *tr =
1977 (struct tc35815_regs __iomem *)dev->base_addr;
1978 if (netif_running(dev)) {
1979 /* Update the statistics from the device registers. */
1980 lp->stats.rx_missed_errors = tc_readl(&tr->Miss_Cnt);
1981 }
1982
1983 return &lp->stats;
1984 }
1985
1986 static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
1987 {
1988 struct tc35815_local *lp = dev->priv;
1989 struct tc35815_regs __iomem *tr =
1990 (struct tc35815_regs __iomem *)dev->base_addr;
1991 int cam_index = index * 6;
1992 u32 cam_data;
1993 u32 saved_addr;
1994 saved_addr = tc_readl(&tr->CAM_Adr);
1995
1996 if (netif_msg_hw(lp)) {
1997 int i;
1998 printk(KERN_DEBUG "%s: CAM %d:", dev->name, index);
1999 for (i = 0; i < 6; i++)
2000 printk(" %02x", addr[i]);
2001 printk("\n");
2002 }
2003 if (index & 1) {
2004 /* read modify write */
2005 tc_writel(cam_index - 2, &tr->CAM_Adr);
2006 cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
2007 cam_data |= addr[0] << 8 | addr[1];
2008 tc_writel(cam_data, &tr->CAM_Data);
2009 /* write whole word */
2010 tc_writel(cam_index + 2, &tr->CAM_Adr);
2011 cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
2012 tc_writel(cam_data, &tr->CAM_Data);
2013 } else {
2014 /* write whole word */
2015 tc_writel(cam_index, &tr->CAM_Adr);
2016 cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
2017 tc_writel(cam_data, &tr->CAM_Data);
2018 /* read modify write */
2019 tc_writel(cam_index + 4, &tr->CAM_Adr);
2020 cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
2021 cam_data |= addr[4] << 24 | (addr[5] << 16);
2022 tc_writel(cam_data, &tr->CAM_Data);
2023 }
2024
2025 tc_writel(saved_addr, &tr->CAM_Adr);
2026 }
2027
2028
2029 /*
2030 * Set or clear the multicast filter for this adaptor.
2031 * num_addrs == -1 Promiscuous mode, receive all packets
2032 * num_addrs == 0 Normal mode, clear multicast list
2033 * num_addrs > 0 Multicast mode, receive normal and MC packets,
2034 * and do best-effort filtering.
2035 */
2036 static void
2037 tc35815_set_multicast_list(struct net_device *dev)
2038 {
2039 struct tc35815_regs __iomem *tr =
2040 (struct tc35815_regs __iomem *)dev->base_addr;
2041
2042 if (dev->flags&IFF_PROMISC)
2043 {
2044 #ifdef WORKAROUND_100HALF_PROMISC
2045 /* With some (all?) 100MHalf HUB, controller will hang
2046 * if we enabled promiscuous mode before linkup... */
2047 struct tc35815_local *lp = dev->priv;
2048 int pid = lp->phy_addr;
2049 if (!(tc_mdio_read(dev, pid, MII_BMSR) & BMSR_LSTATUS))
2050 return;
2051 #endif
2052 /* Enable promiscuous mode */
2053 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
2054 }
2055 else if((dev->flags&IFF_ALLMULTI) || dev->mc_count > CAM_ENTRY_MAX - 3)
2056 {
2057 /* CAM 0, 1, 20 are reserved. */
2058 /* Disable promiscuous mode, use normal mode. */
2059 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
2060 }
2061 else if(dev->mc_count)
2062 {
2063 struct dev_mc_list* cur_addr = dev->mc_list;
2064 int i;
2065 int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
2066
2067 tc_writel(0, &tr->CAM_Ctl);
2068 /* Walk the address list, and load the filter */
2069 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
2070 if (!cur_addr)
2071 break;
2072 /* entry 0,1 is reserved. */
2073 tc35815_set_cam_entry(dev, i + 2, cur_addr->dmi_addr);
2074 ena_bits |= CAM_Ena_Bit(i + 2);
2075 }
2076 tc_writel(ena_bits, &tr->CAM_Ena);
2077 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2078 }
2079 else {
2080 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2081 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2082 }
2083 }
2084
2085 static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2086 {
2087 struct tc35815_local *lp = dev->priv;
2088 strcpy(info->driver, MODNAME);
2089 strcpy(info->version, DRV_VERSION);
2090 strcpy(info->bus_info, pci_name(lp->pci_dev));
2091 }
2092
2093 static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2094 {
2095 struct tc35815_local *lp = dev->priv;
2096 spin_lock_irq(&lp->lock);
2097 mii_ethtool_gset(&lp->mii, cmd);
2098 spin_unlock_irq(&lp->lock);
2099 return 0;
2100 }
2101
2102 static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2103 {
2104 struct tc35815_local *lp = dev->priv;
2105 int rc;
2106 #if 1 /* use our negotiation method... */
2107 /* Verify the settings we care about. */
2108 if (cmd->autoneg != AUTONEG_ENABLE &&
2109 cmd->autoneg != AUTONEG_DISABLE)
2110 return -EINVAL;
2111 if (cmd->autoneg == AUTONEG_DISABLE &&
2112 ((cmd->speed != SPEED_100 &&
2113 cmd->speed != SPEED_10) ||
2114 (cmd->duplex != DUPLEX_HALF &&
2115 cmd->duplex != DUPLEX_FULL)))
2116 return -EINVAL;
2117
2118 /* Ok, do it to it. */
2119 spin_lock_irq(&lp->lock);
2120 del_timer(&lp->timer);
2121 tc35815_start_auto_negotiation(dev, cmd);
2122 spin_unlock_irq(&lp->lock);
2123 rc = 0;
2124 #else
2125 spin_lock_irq(&lp->lock);
2126 rc = mii_ethtool_sset(&lp->mii, cmd);
2127 spin_unlock_irq(&lp->lock);
2128 #endif
2129 return rc;
2130 }
2131
2132 static int tc35815_nway_reset(struct net_device *dev)
2133 {
2134 struct tc35815_local *lp = dev->priv;
2135 int rc;
2136 spin_lock_irq(&lp->lock);
2137 rc = mii_nway_restart(&lp->mii);
2138 spin_unlock_irq(&lp->lock);
2139 return rc;
2140 }
2141
2142 static u32 tc35815_get_link(struct net_device *dev)
2143 {
2144 struct tc35815_local *lp = dev->priv;
2145 int rc;
2146 spin_lock_irq(&lp->lock);
2147 rc = mii_link_ok(&lp->mii);
2148 spin_unlock_irq(&lp->lock);
2149 return rc;
2150 }
2151
2152 static u32 tc35815_get_msglevel(struct net_device *dev)
2153 {
2154 struct tc35815_local *lp = dev->priv;
2155 return lp->msg_enable;
2156 }
2157
2158 static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
2159 {
2160 struct tc35815_local *lp = dev->priv;
2161 lp->msg_enable = datum;
2162 }
2163
2164 static int tc35815_get_sset_count(struct net_device *dev, int sset)
2165 {
2166 struct tc35815_local *lp = dev->priv;
2167
2168 switch (sset) {
2169 case ETH_SS_STATS:
2170 return sizeof(lp->lstats) / sizeof(int);
2171 default:
2172 return -EOPNOTSUPP;
2173 }
2174 }
2175
2176 static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2177 {
2178 struct tc35815_local *lp = dev->priv;
2179 data[0] = lp->lstats.max_tx_qlen;
2180 data[1] = lp->lstats.tx_ints;
2181 data[2] = lp->lstats.rx_ints;
2182 data[3] = lp->lstats.tx_underrun;
2183 }
2184
2185 static struct {
2186 const char str[ETH_GSTRING_LEN];
2187 } ethtool_stats_keys[] = {
2188 { "max_tx_qlen" },
2189 { "tx_ints" },
2190 { "rx_ints" },
2191 { "tx_underrun" },
2192 };
2193
2194 static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2195 {
2196 memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2197 }
2198
2199 static const struct ethtool_ops tc35815_ethtool_ops = {
2200 .get_drvinfo = tc35815_get_drvinfo,
2201 .get_settings = tc35815_get_settings,
2202 .set_settings = tc35815_set_settings,
2203 .nway_reset = tc35815_nway_reset,
2204 .get_link = tc35815_get_link,
2205 .get_msglevel = tc35815_get_msglevel,
2206 .set_msglevel = tc35815_set_msglevel,
2207 .get_strings = tc35815_get_strings,
2208 .get_sset_count = tc35815_get_sset_count,
2209 .get_ethtool_stats = tc35815_get_ethtool_stats,
2210 };
2211
2212 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2213 {
2214 struct tc35815_local *lp = dev->priv;
2215 int rc;
2216
2217 if (!netif_running(dev))
2218 return -EINVAL;
2219
2220 spin_lock_irq(&lp->lock);
2221 rc = generic_mii_ioctl(&lp->mii, if_mii(rq), cmd, NULL);
2222 spin_unlock_irq(&lp->lock);
2223
2224 return rc;
2225 }
2226
2227 static int tc_mdio_read(struct net_device *dev, int phy_id, int location)
2228 {
2229 struct tc35815_regs __iomem *tr =
2230 (struct tc35815_regs __iomem *)dev->base_addr;
2231 u32 data;
2232 tc_writel(MD_CA_Busy | (phy_id << 5) | location, &tr->MD_CA);
2233 while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
2234 ;
2235 data = tc_readl(&tr->MD_Data);
2236 return data & 0xffff;
2237 }
2238
2239 static void tc_mdio_write(struct net_device *dev, int phy_id, int location,
2240 int val)
2241 {
2242 struct tc35815_regs __iomem *tr =
2243 (struct tc35815_regs __iomem *)dev->base_addr;
2244 tc_writel(val, &tr->MD_Data);
2245 tc_writel(MD_CA_Busy | MD_CA_Wr | (phy_id << 5) | location, &tr->MD_CA);
2246 while (tc_readl(&tr->MD_CA) & MD_CA_Busy)
2247 ;
2248 }
2249
2250 /* Auto negotiation. The scheme is very simple. We have a timer routine
2251 * that keeps watching the auto negotiation process as it progresses.
2252 * The DP83840 is first told to start doing it's thing, we set up the time
2253 * and place the timer state machine in it's initial state.
2254 *
2255 * Here the timer peeks at the DP83840 status registers at each click to see
2256 * if the auto negotiation has completed, we assume here that the DP83840 PHY
2257 * will time out at some point and just tell us what (didn't) happen. For
2258 * complete coverage we only allow so many of the ticks at this level to run,
2259 * when this has expired we print a warning message and try another strategy.
2260 * This "other" strategy is to force the interface into various speed/duplex
2261 * configurations and we stop when we see a link-up condition before the
2262 * maximum number of "peek" ticks have occurred.
2263 *
2264 * Once a valid link status has been detected we configure the BigMAC and
2265 * the rest of the Happy Meal to speak the most efficient protocol we could
2266 * get a clean link for. The priority for link configurations, highest first
2267 * is:
2268 * 100 Base-T Full Duplex
2269 * 100 Base-T Half Duplex
2270 * 10 Base-T Full Duplex
2271 * 10 Base-T Half Duplex
2272 *
2273 * We start a new timer now, after a successful auto negotiation status has
2274 * been detected. This timer just waits for the link-up bit to get set in
2275 * the BMCR of the DP83840. When this occurs we print a kernel log message
2276 * describing the link type in use and the fact that it is up.
2277 *
2278 * If a fatal error of some sort is signalled and detected in the interrupt
2279 * service routine, and the chip is reset, or the link is ifconfig'd down
2280 * and then back up, this entire process repeats itself all over again.
2281 */
2282 /* Note: Above comments are come from sunhme driver. */
2283
2284 static int tc35815_try_next_permutation(struct net_device *dev)
2285 {
2286 struct tc35815_local *lp = dev->priv;
2287 int pid = lp->phy_addr;
2288 unsigned short bmcr;
2289
2290 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2291
2292 /* Downgrade from full to half duplex. Only possible via ethtool. */
2293 if (bmcr & BMCR_FULLDPLX) {
2294 bmcr &= ~BMCR_FULLDPLX;
2295 printk(KERN_DEBUG "%s: try next permutation (BMCR %x)\n", dev->name, bmcr);
2296 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2297 return 0;
2298 }
2299
2300 /* Downgrade from 100 to 10. */
2301 if (bmcr & BMCR_SPEED100) {
2302 bmcr &= ~BMCR_SPEED100;
2303 printk(KERN_DEBUG "%s: try next permutation (BMCR %x)\n", dev->name, bmcr);
2304 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2305 return 0;
2306 }
2307
2308 /* We've tried everything. */
2309 return -1;
2310 }
2311
2312 static void
2313 tc35815_display_link_mode(struct net_device *dev)
2314 {
2315 struct tc35815_local *lp = dev->priv;
2316 int pid = lp->phy_addr;
2317 unsigned short lpa, bmcr;
2318 char *speed = "", *duplex = "";
2319
2320 lpa = tc_mdio_read(dev, pid, MII_LPA);
2321 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2322 if (options.speed ? (bmcr & BMCR_SPEED100) : (lpa & (LPA_100HALF | LPA_100FULL)))
2323 speed = "100Mb/s";
2324 else
2325 speed = "10Mb/s";
2326 if (options.duplex ? (bmcr & BMCR_FULLDPLX) : (lpa & (LPA_100FULL | LPA_10FULL)))
2327 duplex = "Full Duplex";
2328 else
2329 duplex = "Half Duplex";
2330
2331 if (netif_msg_link(lp))
2332 printk(KERN_INFO "%s: Link is up at %s, %s.\n",
2333 dev->name, speed, duplex);
2334 printk(KERN_DEBUG "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
2335 dev->name,
2336 bmcr, tc_mdio_read(dev, pid, MII_BMSR), lpa);
2337 }
2338
2339 static void tc35815_display_forced_link_mode(struct net_device *dev)
2340 {
2341 struct tc35815_local *lp = dev->priv;
2342 int pid = lp->phy_addr;
2343 unsigned short bmcr;
2344 char *speed = "", *duplex = "";
2345
2346 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2347 if (bmcr & BMCR_SPEED100)
2348 speed = "100Mb/s";
2349 else
2350 speed = "10Mb/s";
2351 if (bmcr & BMCR_FULLDPLX)
2352 duplex = "Full Duplex.\n";
2353 else
2354 duplex = "Half Duplex.\n";
2355
2356 if (netif_msg_link(lp))
2357 printk(KERN_INFO "%s: Link has been forced up at %s, %s",
2358 dev->name, speed, duplex);
2359 }
2360
2361 static void tc35815_set_link_modes(struct net_device *dev)
2362 {
2363 struct tc35815_local *lp = dev->priv;
2364 struct tc35815_regs __iomem *tr =
2365 (struct tc35815_regs __iomem *)dev->base_addr;
2366 int pid = lp->phy_addr;
2367 unsigned short bmcr, lpa;
2368 int speed;
2369
2370 if (lp->timer_state == arbwait) {
2371 lpa = tc_mdio_read(dev, pid, MII_LPA);
2372 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2373 printk(KERN_DEBUG "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
2374 dev->name,
2375 bmcr, tc_mdio_read(dev, pid, MII_BMSR), lpa);
2376 if (!(lpa & (LPA_10HALF | LPA_10FULL |
2377 LPA_100HALF | LPA_100FULL))) {
2378 /* fall back to 10HALF */
2379 printk(KERN_INFO "%s: bad ability %04x - falling back to 10HD.\n",
2380 dev->name, lpa);
2381 lpa = LPA_10HALF;
2382 }
2383 if (options.duplex ? (bmcr & BMCR_FULLDPLX) : (lpa & (LPA_100FULL | LPA_10FULL)))
2384 lp->fullduplex = 1;
2385 else
2386 lp->fullduplex = 0;
2387 if (options.speed ? (bmcr & BMCR_SPEED100) : (lpa & (LPA_100HALF | LPA_100FULL)))
2388 speed = 100;
2389 else
2390 speed = 10;
2391 } else {
2392 /* Forcing a link mode. */
2393 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2394 if (bmcr & BMCR_FULLDPLX)
2395 lp->fullduplex = 1;
2396 else
2397 lp->fullduplex = 0;
2398 if (bmcr & BMCR_SPEED100)
2399 speed = 100;
2400 else
2401 speed = 10;
2402 }
2403
2404 tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_HaltReq, &tr->MAC_Ctl);
2405 if (lp->fullduplex) {
2406 tc_writel(tc_readl(&tr->MAC_Ctl) | MAC_FullDup, &tr->MAC_Ctl);
2407 } else {
2408 tc_writel(tc_readl(&tr->MAC_Ctl) & ~MAC_FullDup, &tr->MAC_Ctl);
2409 }
2410 tc_writel(tc_readl(&tr->MAC_Ctl) & ~MAC_HaltReq, &tr->MAC_Ctl);
2411
2412 /* TX4939 PCFG.SPEEDn bit will be changed on NETDEV_CHANGE event. */
2413
2414 #ifndef NO_CHECK_CARRIER
2415 /* TX4939 does not have EnLCarr */
2416 if (lp->boardtype != TC35815_TX4939) {
2417 #ifdef WORKAROUND_LOSTCAR
2418 /* WORKAROUND: enable LostCrS only if half duplex operation */
2419 if (!lp->fullduplex && lp->boardtype != TC35815_TX4939)
2420 tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr, &tr->Tx_Ctl);
2421 #endif
2422 }
2423 #endif
2424 lp->mii.full_duplex = lp->fullduplex;
2425 }
2426
2427 static void tc35815_timer(unsigned long data)
2428 {
2429 struct net_device *dev = (struct net_device *)data;
2430 struct tc35815_local *lp = dev->priv;
2431 int pid = lp->phy_addr;
2432 unsigned short bmsr, bmcr, lpa;
2433 int restart_timer = 0;
2434
2435 spin_lock_irq(&lp->lock);
2436
2437 lp->timer_ticks++;
2438 switch (lp->timer_state) {
2439 case arbwait:
2440 /*
2441 * Only allow for 5 ticks, thats 10 seconds and much too
2442 * long to wait for arbitration to complete.
2443 */
2444 /* TC35815 need more times... */
2445 if (lp->timer_ticks >= 10) {
2446 /* Enter force mode. */
2447 if (!options.doforce) {
2448 printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful,"
2449 " cable probblem?\n", dev->name);
2450 /* Try to restart the adaptor. */
2451 tc35815_restart(dev);
2452 goto out;
2453 }
2454 printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful,"
2455 " trying force link mode\n", dev->name);
2456 printk(KERN_DEBUG "%s: BMCR %x BMSR %x\n", dev->name,
2457 tc_mdio_read(dev, pid, MII_BMCR),
2458 tc_mdio_read(dev, pid, MII_BMSR));
2459 bmcr = BMCR_SPEED100;
2460 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2461
2462 /*
2463 * OK, seems we need do disable the transceiver
2464 * for the first tick to make sure we get an
2465 * accurate link state at the second tick.
2466 */
2467
2468 lp->timer_state = ltrywait;
2469 lp->timer_ticks = 0;
2470 restart_timer = 1;
2471 } else {
2472 /* Anything interesting happen? */
2473 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2474 if (bmsr & BMSR_ANEGCOMPLETE) {
2475 /* Just what we've been waiting for... */
2476 tc35815_set_link_modes(dev);
2477
2478 /*
2479 * Success, at least so far, advance our state
2480 * engine.
2481 */
2482 lp->timer_state = lupwait;
2483 restart_timer = 1;
2484 } else {
2485 restart_timer = 1;
2486 }
2487 }
2488 break;
2489
2490 case lupwait:
2491 /*
2492 * Auto negotiation was successful and we are awaiting a
2493 * link up status. I have decided to let this timer run
2494 * forever until some sort of error is signalled, reporting
2495 * a message to the user at 10 second intervals.
2496 */
2497 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2498 if (bmsr & BMSR_LSTATUS) {
2499 /*
2500 * Wheee, it's up, display the link mode in use and put
2501 * the timer to sleep.
2502 */
2503 tc35815_display_link_mode(dev);
2504 netif_carrier_on(dev);
2505 #ifdef WORKAROUND_100HALF_PROMISC
2506 /* delayed promiscuous enabling */
2507 if (dev->flags & IFF_PROMISC)
2508 tc35815_set_multicast_list(dev);
2509 #endif
2510 #if 1
2511 lp->saved_lpa = tc_mdio_read(dev, pid, MII_LPA);
2512 lp->timer_state = lcheck;
2513 restart_timer = 1;
2514 #else
2515 lp->timer_state = asleep;
2516 restart_timer = 0;
2517 #endif
2518 } else {
2519 if (lp->timer_ticks >= 10) {
2520 printk(KERN_NOTICE "%s: Auto negotiation successful, link still "
2521 "not completely up.\n", dev->name);
2522 lp->timer_ticks = 0;
2523 restart_timer = 1;
2524 } else {
2525 restart_timer = 1;
2526 }
2527 }
2528 break;
2529
2530 case ltrywait:
2531 /*
2532 * Making the timeout here too long can make it take
2533 * annoyingly long to attempt all of the link mode
2534 * permutations, but then again this is essentially
2535 * error recovery code for the most part.
2536 */
2537 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2538 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2539 if (lp->timer_ticks == 1) {
2540 /*
2541 * Re-enable transceiver, we'll re-enable the
2542 * transceiver next tick, then check link state
2543 * on the following tick.
2544 */
2545 restart_timer = 1;
2546 break;
2547 }
2548 if (lp->timer_ticks == 2) {
2549 restart_timer = 1;
2550 break;
2551 }
2552 if (bmsr & BMSR_LSTATUS) {
2553 /* Force mode selection success. */
2554 tc35815_display_forced_link_mode(dev);
2555 netif_carrier_on(dev);
2556 tc35815_set_link_modes(dev);
2557 #ifdef WORKAROUND_100HALF_PROMISC
2558 /* delayed promiscuous enabling */
2559 if (dev->flags & IFF_PROMISC)
2560 tc35815_set_multicast_list(dev);
2561 #endif
2562 #if 1
2563 lp->saved_lpa = tc_mdio_read(dev, pid, MII_LPA);
2564 lp->timer_state = lcheck;
2565 restart_timer = 1;
2566 #else
2567 lp->timer_state = asleep;
2568 restart_timer = 0;
2569 #endif
2570 } else {
2571 if (lp->timer_ticks >= 4) { /* 6 seconds or so... */
2572 int ret;
2573
2574 ret = tc35815_try_next_permutation(dev);
2575 if (ret == -1) {
2576 /*
2577 * Aieee, tried them all, reset the
2578 * chip and try all over again.
2579 */
2580 printk(KERN_NOTICE "%s: Link down, "
2581 "cable problem?\n",
2582 dev->name);
2583
2584 /* Try to restart the adaptor. */
2585 tc35815_restart(dev);
2586 goto out;
2587 }
2588 lp->timer_ticks = 0;
2589 restart_timer = 1;
2590 } else {
2591 restart_timer = 1;
2592 }
2593 }
2594 break;
2595
2596 case lcheck:
2597 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2598 lpa = tc_mdio_read(dev, pid, MII_LPA);
2599 if (bmcr & (BMCR_PDOWN | BMCR_ISOLATE | BMCR_RESET)) {
2600 printk(KERN_ERR "%s: PHY down? (BMCR %x)\n", dev->name,
2601 bmcr);
2602 } else if ((lp->saved_lpa ^ lpa) &
2603 (LPA_100FULL|LPA_100HALF|LPA_10FULL|LPA_10HALF)) {
2604 printk(KERN_NOTICE "%s: link status changed"
2605 " (BMCR %x LPA %x->%x)\n", dev->name,
2606 bmcr, lp->saved_lpa, lpa);
2607 } else {
2608 /* go on */
2609 restart_timer = 1;
2610 break;
2611 }
2612 /* Try to restart the adaptor. */
2613 tc35815_restart(dev);
2614 goto out;
2615
2616 case asleep:
2617 default:
2618 /* Can't happens.... */
2619 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got "
2620 "one anyways!\n", dev->name);
2621 restart_timer = 0;
2622 lp->timer_ticks = 0;
2623 lp->timer_state = asleep; /* foo on you */
2624 break;
2625 }
2626
2627 if (restart_timer) {
2628 lp->timer.expires = jiffies + msecs_to_jiffies(1200);
2629 add_timer(&lp->timer);
2630 }
2631 out:
2632 spin_unlock_irq(&lp->lock);
2633 }
2634
2635 static void tc35815_start_auto_negotiation(struct net_device *dev,
2636 struct ethtool_cmd *ep)
2637 {
2638 struct tc35815_local *lp = dev->priv;
2639 int pid = lp->phy_addr;
2640 unsigned short bmsr, bmcr, advertize;
2641 int timeout;
2642
2643 netif_carrier_off(dev);
2644 bmsr = tc_mdio_read(dev, pid, MII_BMSR);
2645 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2646 advertize = tc_mdio_read(dev, pid, MII_ADVERTISE);
2647
2648 if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
2649 if (options.speed || options.duplex) {
2650 /* Advertise only specified configuration. */
2651 advertize &= ~(ADVERTISE_10HALF |
2652 ADVERTISE_10FULL |
2653 ADVERTISE_100HALF |
2654 ADVERTISE_100FULL);
2655 if (options.speed != 10) {
2656 if (options.duplex != 1)
2657 advertize |= ADVERTISE_100FULL;
2658 if (options.duplex != 2)
2659 advertize |= ADVERTISE_100HALF;
2660 }
2661 if (options.speed != 100) {
2662 if (options.duplex != 1)
2663 advertize |= ADVERTISE_10FULL;
2664 if (options.duplex != 2)
2665 advertize |= ADVERTISE_10HALF;
2666 }
2667 if (options.speed == 100)
2668 bmcr |= BMCR_SPEED100;
2669 else if (options.speed == 10)
2670 bmcr &= ~BMCR_SPEED100;
2671 if (options.duplex == 2)
2672 bmcr |= BMCR_FULLDPLX;
2673 else if (options.duplex == 1)
2674 bmcr &= ~BMCR_FULLDPLX;
2675 } else {
2676 /* Advertise everything we can support. */
2677 if (bmsr & BMSR_10HALF)
2678 advertize |= ADVERTISE_10HALF;
2679 else
2680 advertize &= ~ADVERTISE_10HALF;
2681 if (bmsr & BMSR_10FULL)
2682 advertize |= ADVERTISE_10FULL;
2683 else
2684 advertize &= ~ADVERTISE_10FULL;
2685 if (bmsr & BMSR_100HALF)
2686 advertize |= ADVERTISE_100HALF;
2687 else
2688 advertize &= ~ADVERTISE_100HALF;
2689 if (bmsr & BMSR_100FULL)
2690 advertize |= ADVERTISE_100FULL;
2691 else
2692 advertize &= ~ADVERTISE_100FULL;
2693 }
2694
2695 tc_mdio_write(dev, pid, MII_ADVERTISE, advertize);
2696
2697 /* Enable Auto-Negotiation, this is usually on already... */
2698 bmcr |= BMCR_ANENABLE;
2699 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2700
2701 /* Restart it to make sure it is going. */
2702 bmcr |= BMCR_ANRESTART;
2703 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2704 printk(KERN_DEBUG "%s: ADVERTISE %x BMCR %x\n", dev->name, advertize, bmcr);
2705
2706 /* BMCR_ANRESTART self clears when the process has begun. */
2707 timeout = 64; /* More than enough. */
2708 while (--timeout) {
2709 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2710 if (!(bmcr & BMCR_ANRESTART))
2711 break; /* got it. */
2712 udelay(10);
2713 }
2714 if (!timeout) {
2715 printk(KERN_ERR "%s: TC35815 would not start auto "
2716 "negotiation BMCR=0x%04x\n",
2717 dev->name, bmcr);
2718 printk(KERN_NOTICE "%s: Performing force link "
2719 "detection.\n", dev->name);
2720 goto force_link;
2721 } else {
2722 printk(KERN_DEBUG "%s: auto negotiation started.\n", dev->name);
2723 lp->timer_state = arbwait;
2724 }
2725 } else {
2726 force_link:
2727 /* Force the link up, trying first a particular mode.
2728 * Either we are here at the request of ethtool or
2729 * because the Happy Meal would not start to autoneg.
2730 */
2731
2732 /* Disable auto-negotiation in BMCR, enable the duplex and
2733 * speed setting, init the timer state machine, and fire it off.
2734 */
2735 if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
2736 bmcr = BMCR_SPEED100;
2737 } else {
2738 if (ep->speed == SPEED_100)
2739 bmcr = BMCR_SPEED100;
2740 else
2741 bmcr = 0;
2742 if (ep->duplex == DUPLEX_FULL)
2743 bmcr |= BMCR_FULLDPLX;
2744 }
2745 tc_mdio_write(dev, pid, MII_BMCR, bmcr);
2746
2747 /* OK, seems we need do disable the transceiver for the first
2748 * tick to make sure we get an accurate link state at the
2749 * second tick.
2750 */
2751 lp->timer_state = ltrywait;
2752 }
2753
2754 del_timer(&lp->timer);
2755 lp->timer_ticks = 0;
2756 lp->timer.expires = jiffies + msecs_to_jiffies(1200);
2757 add_timer(&lp->timer);
2758 }
2759
2760 static void tc35815_find_phy(struct net_device *dev)
2761 {
2762 struct tc35815_local *lp = dev->priv;
2763 int pid = lp->phy_addr;
2764 unsigned short id0;
2765
2766 /* find MII phy */
2767 for (pid = 31; pid >= 0; pid--) {
2768 id0 = tc_mdio_read(dev, pid, MII_BMSR);
2769 if (id0 != 0xffff && id0 != 0x0000 &&
2770 (id0 & BMSR_RESV) != (0xffff & BMSR_RESV) /* paranoia? */
2771 ) {
2772 lp->phy_addr = pid;
2773 break;
2774 }
2775 }
2776 if (pid < 0) {
2777 printk(KERN_ERR "%s: No MII Phy found.\n",
2778 dev->name);
2779 lp->phy_addr = pid = 0;
2780 }
2781
2782 lp->mii_id[0] = tc_mdio_read(dev, pid, MII_PHYSID1);
2783 lp->mii_id[1] = tc_mdio_read(dev, pid, MII_PHYSID2);
2784 if (netif_msg_hw(lp))
2785 printk(KERN_INFO "%s: PHY(%02x) ID %04x %04x\n", dev->name,
2786 pid, lp->mii_id[0], lp->mii_id[1]);
2787 }
2788
2789 static void tc35815_phy_chip_init(struct net_device *dev)
2790 {
2791 struct tc35815_local *lp = dev->priv;
2792 int pid = lp->phy_addr;
2793 unsigned short bmcr;
2794 struct ethtool_cmd ecmd, *ep;
2795
2796 /* dis-isolate if needed. */
2797 bmcr = tc_mdio_read(dev, pid, MII_BMCR);
2798 if (bmcr & BMCR_ISOLATE) {
2799 int count = 32;
2800 printk(KERN_DEBUG "%s: unisolating...", dev->name);
2801 tc_mdio_write(dev, pid, MII_BMCR, bmcr & ~BMCR_ISOLATE);
2802 while (--count) {
2803 if (!(tc_mdio_read(dev, pid, MII_BMCR) & BMCR_ISOLATE))
2804 break;
2805 udelay(20);
2806 }
2807 printk(" %s.\n", count ? "done" : "failed");
2808 }
2809
2810 if (options.speed && options.duplex) {
2811 ecmd.autoneg = AUTONEG_DISABLE;
2812 ecmd.speed = options.speed == 10 ? SPEED_10 : SPEED_100;
2813 ecmd.duplex = options.duplex == 1 ? DUPLEX_HALF : DUPLEX_FULL;
2814 ep = &ecmd;
2815 } else {
2816 ep = NULL;
2817 }
2818 tc35815_start_auto_negotiation(dev, ep);
2819 }
2820
2821 static void tc35815_chip_reset(struct net_device *dev)
2822 {
2823 struct tc35815_regs __iomem *tr =
2824 (struct tc35815_regs __iomem *)dev->base_addr;
2825 int i;
2826 /* reset the controller */
2827 tc_writel(MAC_Reset, &tr->MAC_Ctl);
2828 udelay(4); /* 3200ns */
2829 i = 0;
2830 while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
2831 if (i++ > 100) {
2832 printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
2833 break;
2834 }
2835 mdelay(1);
2836 }
2837 tc_writel(0, &tr->MAC_Ctl);
2838
2839 /* initialize registers to default value */
2840 tc_writel(0, &tr->DMA_Ctl);
2841 tc_writel(0, &tr->TxThrsh);
2842 tc_writel(0, &tr->TxPollCtr);
2843 tc_writel(0, &tr->RxFragSize);
2844 tc_writel(0, &tr->Int_En);
2845 tc_writel(0, &tr->FDA_Bas);
2846 tc_writel(0, &tr->FDA_Lim);
2847 tc_writel(0xffffffff, &tr->Int_Src); /* Write 1 to clear */
2848 tc_writel(0, &tr->CAM_Ctl);
2849 tc_writel(0, &tr->Tx_Ctl);
2850 tc_writel(0, &tr->Rx_Ctl);
2851 tc_writel(0, &tr->CAM_Ena);
2852 (void)tc_readl(&tr->Miss_Cnt); /* Read to clear */
2853
2854 /* initialize internal SRAM */
2855 tc_writel(DMA_TestMode, &tr->DMA_Ctl);
2856 for (i = 0; i < 0x1000; i += 4) {
2857 tc_writel(i, &tr->CAM_Adr);
2858 tc_writel(0, &tr->CAM_Data);
2859 }
2860 tc_writel(0, &tr->DMA_Ctl);
2861 }
2862
2863 static void tc35815_chip_init(struct net_device *dev)
2864 {
2865 struct tc35815_local *lp = dev->priv;
2866 struct tc35815_regs __iomem *tr =
2867 (struct tc35815_regs __iomem *)dev->base_addr;
2868 unsigned long txctl = TX_CTL_CMD;
2869
2870 tc35815_phy_chip_init(dev);
2871
2872 /* load station address to CAM */
2873 tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
2874
2875 /* Enable CAM (broadcast and unicast) */
2876 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2877 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2878
2879 /* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
2880 if (HAVE_DMA_RXALIGN(lp))
2881 tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
2882 else
2883 tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
2884 #ifdef TC35815_USE_PACKEDBUFFER
2885 tc_writel(RxFrag_EnPack | ETH_ZLEN, &tr->RxFragSize); /* Packing */
2886 #else
2887 tc_writel(ETH_ZLEN, &tr->RxFragSize);
2888 #endif
2889 tc_writel(0, &tr->TxPollCtr); /* Batch mode */
2890 tc_writel(TX_THRESHOLD, &tr->TxThrsh);
2891 tc_writel(INT_EN_CMD, &tr->Int_En);
2892
2893 /* set queues */
2894 tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
2895 tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
2896 &tr->FDA_Lim);
2897 /*
2898 * Activation method:
2899 * First, enable the MAC Transmitter and the DMA Receive circuits.
2900 * Then enable the DMA Transmitter and the MAC Receive circuits.
2901 */
2902 tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr); /* start DMA receiver */
2903 tc_writel(RX_CTL_CMD, &tr->Rx_Ctl); /* start MAC receiver */
2904
2905 /* start MAC transmitter */
2906 #ifndef NO_CHECK_CARRIER
2907 /* TX4939 does not have EnLCarr */
2908 if (lp->boardtype == TC35815_TX4939)
2909 txctl &= ~Tx_EnLCarr;
2910 #ifdef WORKAROUND_LOSTCAR
2911 /* WORKAROUND: ignore LostCrS in full duplex operation */
2912 if ((lp->timer_state != asleep && lp->timer_state != lcheck) ||
2913 lp->fullduplex)
2914 txctl &= ~Tx_EnLCarr;
2915 #endif
2916 #endif /* !NO_CHECK_CARRIER */
2917 #ifdef GATHER_TXINT
2918 txctl &= ~Tx_EnComp; /* disable global tx completion int. */
2919 #endif
2920 tc_writel(txctl, &tr->Tx_Ctl);
2921 }
2922
2923 #ifdef CONFIG_PM
2924 static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
2925 {
2926 struct net_device *dev = pci_get_drvdata(pdev);
2927 struct tc35815_local *lp = dev->priv;
2928 unsigned long flags;
2929
2930 pci_save_state(pdev);
2931 if (!netif_running(dev))
2932 return 0;
2933 netif_device_detach(dev);
2934 spin_lock_irqsave(&lp->lock, flags);
2935 del_timer(&lp->timer); /* Kill if running */
2936 tc35815_chip_reset(dev);
2937 spin_unlock_irqrestore(&lp->lock, flags);
2938 pci_set_power_state(pdev, PCI_D3hot);
2939 return 0;
2940 }
2941
2942 static int tc35815_resume(struct pci_dev *pdev)
2943 {
2944 struct net_device *dev = pci_get_drvdata(pdev);
2945 struct tc35815_local *lp = dev->priv;
2946 unsigned long flags;
2947
2948 pci_restore_state(pdev);
2949 if (!netif_running(dev))
2950 return 0;
2951 pci_set_power_state(pdev, PCI_D0);
2952 spin_lock_irqsave(&lp->lock, flags);
2953 tc35815_restart(dev);
2954 spin_unlock_irqrestore(&lp->lock, flags);
2955 netif_device_attach(dev);
2956 return 0;
2957 }
2958 #endif /* CONFIG_PM */
2959
2960 static struct pci_driver tc35815_pci_driver = {
2961 .name = MODNAME,
2962 .id_table = tc35815_pci_tbl,
2963 .probe = tc35815_init_one,
2964 .remove = __devexit_p(tc35815_remove_one),
2965 #ifdef CONFIG_PM
2966 .suspend = tc35815_suspend,
2967 .resume = tc35815_resume,
2968 #endif
2969 };
2970
2971 module_param_named(speed, options.speed, int, 0);
2972 MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
2973 module_param_named(duplex, options.duplex, int, 0);
2974 MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
2975 module_param_named(doforce, options.doforce, int, 0);
2976 MODULE_PARM_DESC(doforce, "try force link mode if auto-negotiation failed");
2977
2978 static int __init tc35815_init_module(void)
2979 {
2980 return pci_register_driver(&tc35815_pci_driver);
2981 }
2982
2983 static void __exit tc35815_cleanup_module(void)
2984 {
2985 pci_unregister_driver(&tc35815_pci_driver);
2986 }
2987
2988 module_init(tc35815_init_module);
2989 module_exit(tc35815_cleanup_module);
2990
2991 MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
2992 MODULE_LICENSE("GPL");
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