pch_can: fix 800k comms issue
[linux-2.6.git] / drivers / net / tsi108_eth.c
1 /*******************************************************************************
2
3   Copyright(c) 2006 Tundra Semiconductor Corporation.
4
5   This program is free software; you can redistribute it and/or modify it
6   under the terms of the GNU General Public License as published by the Free
7   Software Foundation; either version 2 of the License, or (at your option)
8   any later version.
9
10   This program is distributed in the hope that it will be useful, but WITHOUT
11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13   more details.
14
15   You should have received a copy of the GNU General Public License along with
16   this program; if not, write to the Free Software Foundation, Inc., 59
17   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18
19 *******************************************************************************/
20
21 /* This driver is based on the driver code originally developed
22  * for the Intel IOC80314 (ForestLake) Gigabit Ethernet by
23  * scott.wood@timesys.com  * Copyright (C) 2003 TimeSys Corporation
24  *
25  * Currently changes from original version are:
26  * - porting to Tsi108-based platform and kernel 2.6 (kong.lai@tundra.com)
27  * - modifications to handle two ports independently and support for
28  *   additional PHY devices (alexandre.bounine@tundra.com)
29  * - Get hardware information from platform device. (tie-fei.zang@freescale.com)
30  *
31  */
32
33 #include <linux/module.h>
34 #include <linux/types.h>
35 #include <linux/init.h>
36 #include <linux/net.h>
37 #include <linux/netdevice.h>
38 #include <linux/etherdevice.h>
39 #include <linux/ethtool.h>
40 #include <linux/skbuff.h>
41 #include <linux/spinlock.h>
42 #include <linux/delay.h>
43 #include <linux/crc32.h>
44 #include <linux/mii.h>
45 #include <linux/device.h>
46 #include <linux/pci.h>
47 #include <linux/rtnetlink.h>
48 #include <linux/timer.h>
49 #include <linux/platform_device.h>
50 #include <linux/gfp.h>
51
52 #include <asm/system.h>
53 #include <asm/io.h>
54 #include <asm/tsi108.h>
55
56 #include "tsi108_eth.h"
57
58 #define MII_READ_DELAY 10000    /* max link wait time in msec */
59
60 #define TSI108_RXRING_LEN     256
61
62 /* NOTE: The driver currently does not support receiving packets
63  * larger than the buffer size, so don't decrease this (unless you
64  * want to add such support).
65  */
66 #define TSI108_RXBUF_SIZE     1536
67
68 #define TSI108_TXRING_LEN     256
69
70 #define TSI108_TX_INT_FREQ    64
71
72 /* Check the phy status every half a second. */
73 #define CHECK_PHY_INTERVAL (HZ/2)
74
75 static int tsi108_init_one(struct platform_device *pdev);
76 static int tsi108_ether_remove(struct platform_device *pdev);
77
78 struct tsi108_prv_data {
79         void  __iomem *regs;    /* Base of normal regs */
80         void  __iomem *phyregs; /* Base of register bank used for PHY access */
81
82         struct net_device *dev;
83         struct napi_struct napi;
84
85         unsigned int phy;               /* Index of PHY for this interface */
86         unsigned int irq_num;
87         unsigned int id;
88         unsigned int phy_type;
89
90         struct timer_list timer;/* Timer that triggers the check phy function */
91         unsigned int rxtail;    /* Next entry in rxring to read */
92         unsigned int rxhead;    /* Next entry in rxring to give a new buffer */
93         unsigned int rxfree;    /* Number of free, allocated RX buffers */
94
95         unsigned int rxpending; /* Non-zero if there are still descriptors
96                                  * to be processed from a previous descriptor
97                                  * interrupt condition that has been cleared */
98
99         unsigned int txtail;    /* Next TX descriptor to check status on */
100         unsigned int txhead;    /* Next TX descriptor to use */
101
102         /* Number of free TX descriptors.  This could be calculated from
103          * rxhead and rxtail if one descriptor were left unused to disambiguate
104          * full and empty conditions, but it's simpler to just keep track
105          * explicitly. */
106
107         unsigned int txfree;
108
109         unsigned int phy_ok;            /* The PHY is currently powered on. */
110
111         /* PHY status (duplex is 1 for half, 2 for full,
112          * so that the default 0 indicates that neither has
113          * yet been configured). */
114
115         unsigned int link_up;
116         unsigned int speed;
117         unsigned int duplex;
118
119         tx_desc *txring;
120         rx_desc *rxring;
121         struct sk_buff *txskbs[TSI108_TXRING_LEN];
122         struct sk_buff *rxskbs[TSI108_RXRING_LEN];
123
124         dma_addr_t txdma, rxdma;
125
126         /* txlock nests in misclock and phy_lock */
127
128         spinlock_t txlock, misclock;
129
130         /* stats is used to hold the upper bits of each hardware counter,
131          * and tmpstats is used to hold the full values for returning
132          * to the caller of get_stats().  They must be separate in case
133          * an overflow interrupt occurs before the stats are consumed.
134          */
135
136         struct net_device_stats stats;
137         struct net_device_stats tmpstats;
138
139         /* These stats are kept separate in hardware, thus require individual
140          * fields for handling carry.  They are combined in get_stats.
141          */
142
143         unsigned long rx_fcs;   /* Add to rx_frame_errors */
144         unsigned long rx_short_fcs;     /* Add to rx_frame_errors */
145         unsigned long rx_long_fcs;      /* Add to rx_frame_errors */
146         unsigned long rx_underruns;     /* Add to rx_length_errors */
147         unsigned long rx_overruns;      /* Add to rx_length_errors */
148
149         unsigned long tx_coll_abort;    /* Add to tx_aborted_errors/collisions */
150         unsigned long tx_pause_drop;    /* Add to tx_aborted_errors */
151
152         unsigned long mc_hash[16];
153         u32 msg_enable;                 /* debug message level */
154         struct mii_if_info mii_if;
155         unsigned int init_media;
156 };
157
158 /* Structure for a device driver */
159
160 static struct platform_driver tsi_eth_driver = {
161         .probe = tsi108_init_one,
162         .remove = tsi108_ether_remove,
163         .driver = {
164                 .name = "tsi-ethernet",
165                 .owner = THIS_MODULE,
166         },
167 };
168
169 static void tsi108_timed_checker(unsigned long dev_ptr);
170
171 static void dump_eth_one(struct net_device *dev)
172 {
173         struct tsi108_prv_data *data = netdev_priv(dev);
174
175         printk("Dumping %s...\n", dev->name);
176         printk("intstat %x intmask %x phy_ok %d"
177                " link %d speed %d duplex %d\n",
178                TSI_READ(TSI108_EC_INTSTAT),
179                TSI_READ(TSI108_EC_INTMASK), data->phy_ok,
180                data->link_up, data->speed, data->duplex);
181
182         printk("TX: head %d, tail %d, free %d, stat %x, estat %x, err %x\n",
183                data->txhead, data->txtail, data->txfree,
184                TSI_READ(TSI108_EC_TXSTAT),
185                TSI_READ(TSI108_EC_TXESTAT),
186                TSI_READ(TSI108_EC_TXERR));
187
188         printk("RX: head %d, tail %d, free %d, stat %x,"
189                " estat %x, err %x, pending %d\n\n",
190                data->rxhead, data->rxtail, data->rxfree,
191                TSI_READ(TSI108_EC_RXSTAT),
192                TSI_READ(TSI108_EC_RXESTAT),
193                TSI_READ(TSI108_EC_RXERR), data->rxpending);
194 }
195
196 /* Synchronization is needed between the thread and up/down events.
197  * Note that the PHY is accessed through the same registers for both
198  * interfaces, so this can't be made interface-specific.
199  */
200
201 static DEFINE_SPINLOCK(phy_lock);
202
203 static int tsi108_read_mii(struct tsi108_prv_data *data, int reg)
204 {
205         unsigned i;
206
207         TSI_WRITE_PHY(TSI108_MAC_MII_ADDR,
208                                 (data->phy << TSI108_MAC_MII_ADDR_PHY) |
209                                 (reg << TSI108_MAC_MII_ADDR_REG));
210         TSI_WRITE_PHY(TSI108_MAC_MII_CMD, 0);
211         TSI_WRITE_PHY(TSI108_MAC_MII_CMD, TSI108_MAC_MII_CMD_READ);
212         for (i = 0; i < 100; i++) {
213                 if (!(TSI_READ_PHY(TSI108_MAC_MII_IND) &
214                       (TSI108_MAC_MII_IND_NOTVALID | TSI108_MAC_MII_IND_BUSY)))
215                         break;
216                 udelay(10);
217         }
218
219         if (i == 100)
220                 return 0xffff;
221         else
222                 return TSI_READ_PHY(TSI108_MAC_MII_DATAIN);
223 }
224
225 static void tsi108_write_mii(struct tsi108_prv_data *data,
226                                 int reg, u16 val)
227 {
228         unsigned i = 100;
229         TSI_WRITE_PHY(TSI108_MAC_MII_ADDR,
230                                 (data->phy << TSI108_MAC_MII_ADDR_PHY) |
231                                 (reg << TSI108_MAC_MII_ADDR_REG));
232         TSI_WRITE_PHY(TSI108_MAC_MII_DATAOUT, val);
233         while (i--) {
234                 if(!(TSI_READ_PHY(TSI108_MAC_MII_IND) &
235                         TSI108_MAC_MII_IND_BUSY))
236                         break;
237                 udelay(10);
238         }
239 }
240
241 static int tsi108_mdio_read(struct net_device *dev, int addr, int reg)
242 {
243         struct tsi108_prv_data *data = netdev_priv(dev);
244         return tsi108_read_mii(data, reg);
245 }
246
247 static void tsi108_mdio_write(struct net_device *dev, int addr, int reg, int val)
248 {
249         struct tsi108_prv_data *data = netdev_priv(dev);
250         tsi108_write_mii(data, reg, val);
251 }
252
253 static inline void tsi108_write_tbi(struct tsi108_prv_data *data,
254                                         int reg, u16 val)
255 {
256         unsigned i = 1000;
257         TSI_WRITE(TSI108_MAC_MII_ADDR,
258                              (0x1e << TSI108_MAC_MII_ADDR_PHY)
259                              | (reg << TSI108_MAC_MII_ADDR_REG));
260         TSI_WRITE(TSI108_MAC_MII_DATAOUT, val);
261         while(i--) {
262                 if(!(TSI_READ(TSI108_MAC_MII_IND) & TSI108_MAC_MII_IND_BUSY))
263                         return;
264                 udelay(10);
265         }
266         printk(KERN_ERR "%s function time out\n", __func__);
267 }
268
269 static int mii_speed(struct mii_if_info *mii)
270 {
271         int advert, lpa, val, media;
272         int lpa2 = 0;
273         int speed;
274
275         if (!mii_link_ok(mii))
276                 return 0;
277
278         val = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_BMSR);
279         if ((val & BMSR_ANEGCOMPLETE) == 0)
280                 return 0;
281
282         advert = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_ADVERTISE);
283         lpa = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_LPA);
284         media = mii_nway_result(advert & lpa);
285
286         if (mii->supports_gmii)
287                 lpa2 = mii->mdio_read(mii->dev, mii->phy_id, MII_STAT1000);
288
289         speed = lpa2 & (LPA_1000FULL | LPA_1000HALF) ? 1000 :
290                         (media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? 100 : 10);
291         return speed;
292 }
293
294 static void tsi108_check_phy(struct net_device *dev)
295 {
296         struct tsi108_prv_data *data = netdev_priv(dev);
297         u32 mac_cfg2_reg, portctrl_reg;
298         u32 duplex;
299         u32 speed;
300         unsigned long flags;
301
302         spin_lock_irqsave(&phy_lock, flags);
303
304         if (!data->phy_ok)
305                 goto out;
306
307         duplex = mii_check_media(&data->mii_if, netif_msg_link(data), data->init_media);
308         data->init_media = 0;
309
310         if (netif_carrier_ok(dev)) {
311
312                 speed = mii_speed(&data->mii_if);
313
314                 if ((speed != data->speed) || duplex) {
315
316                         mac_cfg2_reg = TSI_READ(TSI108_MAC_CFG2);
317                         portctrl_reg = TSI_READ(TSI108_EC_PORTCTRL);
318
319                         mac_cfg2_reg &= ~TSI108_MAC_CFG2_IFACE_MASK;
320
321                         if (speed == 1000) {
322                                 mac_cfg2_reg |= TSI108_MAC_CFG2_GIG;
323                                 portctrl_reg &= ~TSI108_EC_PORTCTRL_NOGIG;
324                         } else {
325                                 mac_cfg2_reg |= TSI108_MAC_CFG2_NOGIG;
326                                 portctrl_reg |= TSI108_EC_PORTCTRL_NOGIG;
327                         }
328
329                         data->speed = speed;
330
331                         if (data->mii_if.full_duplex) {
332                                 mac_cfg2_reg |= TSI108_MAC_CFG2_FULLDUPLEX;
333                                 portctrl_reg &= ~TSI108_EC_PORTCTRL_HALFDUPLEX;
334                                 data->duplex = 2;
335                         } else {
336                                 mac_cfg2_reg &= ~TSI108_MAC_CFG2_FULLDUPLEX;
337                                 portctrl_reg |= TSI108_EC_PORTCTRL_HALFDUPLEX;
338                                 data->duplex = 1;
339                         }
340
341                         TSI_WRITE(TSI108_MAC_CFG2, mac_cfg2_reg);
342                         TSI_WRITE(TSI108_EC_PORTCTRL, portctrl_reg);
343                 }
344
345                 if (data->link_up == 0) {
346                         /* The manual says it can take 3-4 usecs for the speed change
347                          * to take effect.
348                          */
349                         udelay(5);
350
351                         spin_lock(&data->txlock);
352                         if (is_valid_ether_addr(dev->dev_addr) && data->txfree)
353                                 netif_wake_queue(dev);
354
355                         data->link_up = 1;
356                         spin_unlock(&data->txlock);
357                 }
358         } else {
359                 if (data->link_up == 1) {
360                         netif_stop_queue(dev);
361                         data->link_up = 0;
362                         printk(KERN_NOTICE "%s : link is down\n", dev->name);
363                 }
364
365                 goto out;
366         }
367
368
369 out:
370         spin_unlock_irqrestore(&phy_lock, flags);
371 }
372
373 static inline void
374 tsi108_stat_carry_one(int carry, int carry_bit, int carry_shift,
375                       unsigned long *upper)
376 {
377         if (carry & carry_bit)
378                 *upper += carry_shift;
379 }
380
381 static void tsi108_stat_carry(struct net_device *dev)
382 {
383         struct tsi108_prv_data *data = netdev_priv(dev);
384         u32 carry1, carry2;
385
386         spin_lock_irq(&data->misclock);
387
388         carry1 = TSI_READ(TSI108_STAT_CARRY1);
389         carry2 = TSI_READ(TSI108_STAT_CARRY2);
390
391         TSI_WRITE(TSI108_STAT_CARRY1, carry1);
392         TSI_WRITE(TSI108_STAT_CARRY2, carry2);
393
394         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXBYTES,
395                               TSI108_STAT_RXBYTES_CARRY, &data->stats.rx_bytes);
396
397         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXPKTS,
398                               TSI108_STAT_RXPKTS_CARRY,
399                               &data->stats.rx_packets);
400
401         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXFCS,
402                               TSI108_STAT_RXFCS_CARRY, &data->rx_fcs);
403
404         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXMCAST,
405                               TSI108_STAT_RXMCAST_CARRY,
406                               &data->stats.multicast);
407
408         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXALIGN,
409                               TSI108_STAT_RXALIGN_CARRY,
410                               &data->stats.rx_frame_errors);
411
412         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXLENGTH,
413                               TSI108_STAT_RXLENGTH_CARRY,
414                               &data->stats.rx_length_errors);
415
416         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXRUNT,
417                               TSI108_STAT_RXRUNT_CARRY, &data->rx_underruns);
418
419         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXJUMBO,
420                               TSI108_STAT_RXJUMBO_CARRY, &data->rx_overruns);
421
422         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXFRAG,
423                               TSI108_STAT_RXFRAG_CARRY, &data->rx_short_fcs);
424
425         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXJABBER,
426                               TSI108_STAT_RXJABBER_CARRY, &data->rx_long_fcs);
427
428         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXDROP,
429                               TSI108_STAT_RXDROP_CARRY,
430                               &data->stats.rx_missed_errors);
431
432         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXBYTES,
433                               TSI108_STAT_TXBYTES_CARRY, &data->stats.tx_bytes);
434
435         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXPKTS,
436                               TSI108_STAT_TXPKTS_CARRY,
437                               &data->stats.tx_packets);
438
439         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXEXDEF,
440                               TSI108_STAT_TXEXDEF_CARRY,
441                               &data->stats.tx_aborted_errors);
442
443         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXEXCOL,
444                               TSI108_STAT_TXEXCOL_CARRY, &data->tx_coll_abort);
445
446         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXTCOL,
447                               TSI108_STAT_TXTCOL_CARRY,
448                               &data->stats.collisions);
449
450         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXPAUSE,
451                               TSI108_STAT_TXPAUSEDROP_CARRY,
452                               &data->tx_pause_drop);
453
454         spin_unlock_irq(&data->misclock);
455 }
456
457 /* Read a stat counter atomically with respect to carries.
458  * data->misclock must be held.
459  */
460 static inline unsigned long
461 tsi108_read_stat(struct tsi108_prv_data * data, int reg, int carry_bit,
462                  int carry_shift, unsigned long *upper)
463 {
464         int carryreg;
465         unsigned long val;
466
467         if (reg < 0xb0)
468                 carryreg = TSI108_STAT_CARRY1;
469         else
470                 carryreg = TSI108_STAT_CARRY2;
471
472       again:
473         val = TSI_READ(reg) | *upper;
474
475         /* Check to see if it overflowed, but the interrupt hasn't
476          * been serviced yet.  If so, handle the carry here, and
477          * try again.
478          */
479
480         if (unlikely(TSI_READ(carryreg) & carry_bit)) {
481                 *upper += carry_shift;
482                 TSI_WRITE(carryreg, carry_bit);
483                 goto again;
484         }
485
486         return val;
487 }
488
489 static struct net_device_stats *tsi108_get_stats(struct net_device *dev)
490 {
491         unsigned long excol;
492
493         struct tsi108_prv_data *data = netdev_priv(dev);
494         spin_lock_irq(&data->misclock);
495
496         data->tmpstats.rx_packets =
497             tsi108_read_stat(data, TSI108_STAT_RXPKTS,
498                              TSI108_STAT_CARRY1_RXPKTS,
499                              TSI108_STAT_RXPKTS_CARRY, &data->stats.rx_packets);
500
501         data->tmpstats.tx_packets =
502             tsi108_read_stat(data, TSI108_STAT_TXPKTS,
503                              TSI108_STAT_CARRY2_TXPKTS,
504                              TSI108_STAT_TXPKTS_CARRY, &data->stats.tx_packets);
505
506         data->tmpstats.rx_bytes =
507             tsi108_read_stat(data, TSI108_STAT_RXBYTES,
508                              TSI108_STAT_CARRY1_RXBYTES,
509                              TSI108_STAT_RXBYTES_CARRY, &data->stats.rx_bytes);
510
511         data->tmpstats.tx_bytes =
512             tsi108_read_stat(data, TSI108_STAT_TXBYTES,
513                              TSI108_STAT_CARRY2_TXBYTES,
514                              TSI108_STAT_TXBYTES_CARRY, &data->stats.tx_bytes);
515
516         data->tmpstats.multicast =
517             tsi108_read_stat(data, TSI108_STAT_RXMCAST,
518                              TSI108_STAT_CARRY1_RXMCAST,
519                              TSI108_STAT_RXMCAST_CARRY, &data->stats.multicast);
520
521         excol = tsi108_read_stat(data, TSI108_STAT_TXEXCOL,
522                                  TSI108_STAT_CARRY2_TXEXCOL,
523                                  TSI108_STAT_TXEXCOL_CARRY,
524                                  &data->tx_coll_abort);
525
526         data->tmpstats.collisions =
527             tsi108_read_stat(data, TSI108_STAT_TXTCOL,
528                              TSI108_STAT_CARRY2_TXTCOL,
529                              TSI108_STAT_TXTCOL_CARRY, &data->stats.collisions);
530
531         data->tmpstats.collisions += excol;
532
533         data->tmpstats.rx_length_errors =
534             tsi108_read_stat(data, TSI108_STAT_RXLENGTH,
535                              TSI108_STAT_CARRY1_RXLENGTH,
536                              TSI108_STAT_RXLENGTH_CARRY,
537                              &data->stats.rx_length_errors);
538
539         data->tmpstats.rx_length_errors +=
540             tsi108_read_stat(data, TSI108_STAT_RXRUNT,
541                              TSI108_STAT_CARRY1_RXRUNT,
542                              TSI108_STAT_RXRUNT_CARRY, &data->rx_underruns);
543
544         data->tmpstats.rx_length_errors +=
545             tsi108_read_stat(data, TSI108_STAT_RXJUMBO,
546                              TSI108_STAT_CARRY1_RXJUMBO,
547                              TSI108_STAT_RXJUMBO_CARRY, &data->rx_overruns);
548
549         data->tmpstats.rx_frame_errors =
550             tsi108_read_stat(data, TSI108_STAT_RXALIGN,
551                              TSI108_STAT_CARRY1_RXALIGN,
552                              TSI108_STAT_RXALIGN_CARRY,
553                              &data->stats.rx_frame_errors);
554
555         data->tmpstats.rx_frame_errors +=
556             tsi108_read_stat(data, TSI108_STAT_RXFCS,
557                              TSI108_STAT_CARRY1_RXFCS, TSI108_STAT_RXFCS_CARRY,
558                              &data->rx_fcs);
559
560         data->tmpstats.rx_frame_errors +=
561             tsi108_read_stat(data, TSI108_STAT_RXFRAG,
562                              TSI108_STAT_CARRY1_RXFRAG,
563                              TSI108_STAT_RXFRAG_CARRY, &data->rx_short_fcs);
564
565         data->tmpstats.rx_missed_errors =
566             tsi108_read_stat(data, TSI108_STAT_RXDROP,
567                              TSI108_STAT_CARRY1_RXDROP,
568                              TSI108_STAT_RXDROP_CARRY,
569                              &data->stats.rx_missed_errors);
570
571         /* These three are maintained by software. */
572         data->tmpstats.rx_fifo_errors = data->stats.rx_fifo_errors;
573         data->tmpstats.rx_crc_errors = data->stats.rx_crc_errors;
574
575         data->tmpstats.tx_aborted_errors =
576             tsi108_read_stat(data, TSI108_STAT_TXEXDEF,
577                              TSI108_STAT_CARRY2_TXEXDEF,
578                              TSI108_STAT_TXEXDEF_CARRY,
579                              &data->stats.tx_aborted_errors);
580
581         data->tmpstats.tx_aborted_errors +=
582             tsi108_read_stat(data, TSI108_STAT_TXPAUSEDROP,
583                              TSI108_STAT_CARRY2_TXPAUSE,
584                              TSI108_STAT_TXPAUSEDROP_CARRY,
585                              &data->tx_pause_drop);
586
587         data->tmpstats.tx_aborted_errors += excol;
588
589         data->tmpstats.tx_errors = data->tmpstats.tx_aborted_errors;
590         data->tmpstats.rx_errors = data->tmpstats.rx_length_errors +
591             data->tmpstats.rx_crc_errors +
592             data->tmpstats.rx_frame_errors +
593             data->tmpstats.rx_fifo_errors + data->tmpstats.rx_missed_errors;
594
595         spin_unlock_irq(&data->misclock);
596         return &data->tmpstats;
597 }
598
599 static void tsi108_restart_rx(struct tsi108_prv_data * data, struct net_device *dev)
600 {
601         TSI_WRITE(TSI108_EC_RXQ_PTRHIGH,
602                              TSI108_EC_RXQ_PTRHIGH_VALID);
603
604         TSI_WRITE(TSI108_EC_RXCTRL, TSI108_EC_RXCTRL_GO
605                              | TSI108_EC_RXCTRL_QUEUE0);
606 }
607
608 static void tsi108_restart_tx(struct tsi108_prv_data * data)
609 {
610         TSI_WRITE(TSI108_EC_TXQ_PTRHIGH,
611                              TSI108_EC_TXQ_PTRHIGH_VALID);
612
613         TSI_WRITE(TSI108_EC_TXCTRL, TSI108_EC_TXCTRL_IDLEINT |
614                              TSI108_EC_TXCTRL_GO | TSI108_EC_TXCTRL_QUEUE0);
615 }
616
617 /* txlock must be held by caller, with IRQs disabled, and
618  * with permission to re-enable them when the lock is dropped.
619  */
620 static void tsi108_complete_tx(struct net_device *dev)
621 {
622         struct tsi108_prv_data *data = netdev_priv(dev);
623         int tx;
624         struct sk_buff *skb;
625         int release = 0;
626
627         while (!data->txfree || data->txhead != data->txtail) {
628                 tx = data->txtail;
629
630                 if (data->txring[tx].misc & TSI108_TX_OWN)
631                         break;
632
633                 skb = data->txskbs[tx];
634
635                 if (!(data->txring[tx].misc & TSI108_TX_OK))
636                         printk("%s: bad tx packet, misc %x\n",
637                                dev->name, data->txring[tx].misc);
638
639                 data->txtail = (data->txtail + 1) % TSI108_TXRING_LEN;
640                 data->txfree++;
641
642                 if (data->txring[tx].misc & TSI108_TX_EOF) {
643                         dev_kfree_skb_any(skb);
644                         release++;
645                 }
646         }
647
648         if (release) {
649                 if (is_valid_ether_addr(dev->dev_addr) && data->link_up)
650                         netif_wake_queue(dev);
651         }
652 }
653
654 static int tsi108_send_packet(struct sk_buff * skb, struct net_device *dev)
655 {
656         struct tsi108_prv_data *data = netdev_priv(dev);
657         int frags = skb_shinfo(skb)->nr_frags + 1;
658         int i;
659
660         if (!data->phy_ok && net_ratelimit())
661                 printk(KERN_ERR "%s: Transmit while PHY is down!\n", dev->name);
662
663         if (!data->link_up) {
664                 printk(KERN_ERR "%s: Transmit while link is down!\n",
665                        dev->name);
666                 netif_stop_queue(dev);
667                 return NETDEV_TX_BUSY;
668         }
669
670         if (data->txfree < MAX_SKB_FRAGS + 1) {
671                 netif_stop_queue(dev);
672
673                 if (net_ratelimit())
674                         printk(KERN_ERR "%s: Transmit with full tx ring!\n",
675                                dev->name);
676                 return NETDEV_TX_BUSY;
677         }
678
679         if (data->txfree - frags < MAX_SKB_FRAGS + 1) {
680                 netif_stop_queue(dev);
681         }
682
683         spin_lock_irq(&data->txlock);
684
685         for (i = 0; i < frags; i++) {
686                 int misc = 0;
687                 int tx = data->txhead;
688
689                 /* This is done to mark every TSI108_TX_INT_FREQ tx buffers with
690                  * the interrupt bit.  TX descriptor-complete interrupts are
691                  * enabled when the queue fills up, and masked when there is
692                  * still free space.  This way, when saturating the outbound
693                  * link, the tx interrupts are kept to a reasonable level.
694                  * When the queue is not full, reclamation of skbs still occurs
695                  * as new packets are transmitted, or on a queue-empty
696                  * interrupt.
697                  */
698
699                 if ((tx % TSI108_TX_INT_FREQ == 0) &&
700                     ((TSI108_TXRING_LEN - data->txfree) >= TSI108_TX_INT_FREQ))
701                         misc = TSI108_TX_INT;
702
703                 data->txskbs[tx] = skb;
704
705                 if (i == 0) {
706                         data->txring[tx].buf0 = dma_map_single(NULL, skb->data,
707                                         skb_headlen(skb), DMA_TO_DEVICE);
708                         data->txring[tx].len = skb_headlen(skb);
709                         misc |= TSI108_TX_SOF;
710                 } else {
711                         skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
712
713                         data->txring[tx].buf0 =
714                             dma_map_page(NULL, frag->page, frag->page_offset,
715                                             frag->size, DMA_TO_DEVICE);
716                         data->txring[tx].len = frag->size;
717                 }
718
719                 if (i == frags - 1)
720                         misc |= TSI108_TX_EOF;
721
722                 if (netif_msg_pktdata(data)) {
723                         int i;
724                         printk("%s: Tx Frame contents (%d)\n", dev->name,
725                                skb->len);
726                         for (i = 0; i < skb->len; i++)
727                                 printk(" %2.2x", skb->data[i]);
728                         printk(".\n");
729                 }
730                 data->txring[tx].misc = misc | TSI108_TX_OWN;
731
732                 data->txhead = (data->txhead + 1) % TSI108_TXRING_LEN;
733                 data->txfree--;
734         }
735
736         tsi108_complete_tx(dev);
737
738         /* This must be done after the check for completed tx descriptors,
739          * so that the tail pointer is correct.
740          */
741
742         if (!(TSI_READ(TSI108_EC_TXSTAT) & TSI108_EC_TXSTAT_QUEUE0))
743                 tsi108_restart_tx(data);
744
745         spin_unlock_irq(&data->txlock);
746         return NETDEV_TX_OK;
747 }
748
749 static int tsi108_complete_rx(struct net_device *dev, int budget)
750 {
751         struct tsi108_prv_data *data = netdev_priv(dev);
752         int done = 0;
753
754         while (data->rxfree && done != budget) {
755                 int rx = data->rxtail;
756                 struct sk_buff *skb;
757
758                 if (data->rxring[rx].misc & TSI108_RX_OWN)
759                         break;
760
761                 skb = data->rxskbs[rx];
762                 data->rxtail = (data->rxtail + 1) % TSI108_RXRING_LEN;
763                 data->rxfree--;
764                 done++;
765
766                 if (data->rxring[rx].misc & TSI108_RX_BAD) {
767                         spin_lock_irq(&data->misclock);
768
769                         if (data->rxring[rx].misc & TSI108_RX_CRC)
770                                 data->stats.rx_crc_errors++;
771                         if (data->rxring[rx].misc & TSI108_RX_OVER)
772                                 data->stats.rx_fifo_errors++;
773
774                         spin_unlock_irq(&data->misclock);
775
776                         dev_kfree_skb_any(skb);
777                         continue;
778                 }
779                 if (netif_msg_pktdata(data)) {
780                         int i;
781                         printk("%s: Rx Frame contents (%d)\n",
782                                dev->name, data->rxring[rx].len);
783                         for (i = 0; i < data->rxring[rx].len; i++)
784                                 printk(" %2.2x", skb->data[i]);
785                         printk(".\n");
786                 }
787
788                 skb_put(skb, data->rxring[rx].len);
789                 skb->protocol = eth_type_trans(skb, dev);
790                 netif_receive_skb(skb);
791         }
792
793         return done;
794 }
795
796 static int tsi108_refill_rx(struct net_device *dev, int budget)
797 {
798         struct tsi108_prv_data *data = netdev_priv(dev);
799         int done = 0;
800
801         while (data->rxfree != TSI108_RXRING_LEN && done != budget) {
802                 int rx = data->rxhead;
803                 struct sk_buff *skb;
804
805                 skb = netdev_alloc_skb_ip_align(dev, TSI108_RXBUF_SIZE);
806                 data->rxskbs[rx] = skb;
807                 if (!skb)
808                         break;
809
810                 data->rxring[rx].buf0 = dma_map_single(NULL, skb->data,
811                                                         TSI108_RX_SKB_SIZE,
812                                                         DMA_FROM_DEVICE);
813
814                 /* Sometimes the hardware sets blen to zero after packet
815                  * reception, even though the manual says that it's only ever
816                  * modified by the driver.
817                  */
818
819                 data->rxring[rx].blen = TSI108_RX_SKB_SIZE;
820                 data->rxring[rx].misc = TSI108_RX_OWN | TSI108_RX_INT;
821
822                 data->rxhead = (data->rxhead + 1) % TSI108_RXRING_LEN;
823                 data->rxfree++;
824                 done++;
825         }
826
827         if (done != 0 && !(TSI_READ(TSI108_EC_RXSTAT) &
828                            TSI108_EC_RXSTAT_QUEUE0))
829                 tsi108_restart_rx(data, dev);
830
831         return done;
832 }
833
834 static int tsi108_poll(struct napi_struct *napi, int budget)
835 {
836         struct tsi108_prv_data *data = container_of(napi, struct tsi108_prv_data, napi);
837         struct net_device *dev = data->dev;
838         u32 estat = TSI_READ(TSI108_EC_RXESTAT);
839         u32 intstat = TSI_READ(TSI108_EC_INTSTAT);
840         int num_received = 0, num_filled = 0;
841
842         intstat &= TSI108_INT_RXQUEUE0 | TSI108_INT_RXTHRESH |
843             TSI108_INT_RXOVERRUN | TSI108_INT_RXERROR | TSI108_INT_RXWAIT;
844
845         TSI_WRITE(TSI108_EC_RXESTAT, estat);
846         TSI_WRITE(TSI108_EC_INTSTAT, intstat);
847
848         if (data->rxpending || (estat & TSI108_EC_RXESTAT_Q0_DESCINT))
849                 num_received = tsi108_complete_rx(dev, budget);
850
851         /* This should normally fill no more slots than the number of
852          * packets received in tsi108_complete_rx().  The exception
853          * is when we previously ran out of memory for RX SKBs.  In that
854          * case, it's helpful to obey the budget, not only so that the
855          * CPU isn't hogged, but so that memory (which may still be low)
856          * is not hogged by one device.
857          *
858          * A work unit is considered to be two SKBs to allow us to catch
859          * up when the ring has shrunk due to out-of-memory but we're
860          * still removing the full budget's worth of packets each time.
861          */
862
863         if (data->rxfree < TSI108_RXRING_LEN)
864                 num_filled = tsi108_refill_rx(dev, budget * 2);
865
866         if (intstat & TSI108_INT_RXERROR) {
867                 u32 err = TSI_READ(TSI108_EC_RXERR);
868                 TSI_WRITE(TSI108_EC_RXERR, err);
869
870                 if (err) {
871                         if (net_ratelimit())
872                                 printk(KERN_DEBUG "%s: RX error %x\n",
873                                        dev->name, err);
874
875                         if (!(TSI_READ(TSI108_EC_RXSTAT) &
876                               TSI108_EC_RXSTAT_QUEUE0))
877                                 tsi108_restart_rx(data, dev);
878                 }
879         }
880
881         if (intstat & TSI108_INT_RXOVERRUN) {
882                 spin_lock_irq(&data->misclock);
883                 data->stats.rx_fifo_errors++;
884                 spin_unlock_irq(&data->misclock);
885         }
886
887         if (num_received < budget) {
888                 data->rxpending = 0;
889                 napi_complete(napi);
890
891                 TSI_WRITE(TSI108_EC_INTMASK,
892                                      TSI_READ(TSI108_EC_INTMASK)
893                                      & ~(TSI108_INT_RXQUEUE0
894                                          | TSI108_INT_RXTHRESH |
895                                          TSI108_INT_RXOVERRUN |
896                                          TSI108_INT_RXERROR |
897                                          TSI108_INT_RXWAIT));
898         } else {
899                 data->rxpending = 1;
900         }
901
902         return num_received;
903 }
904
905 static void tsi108_rx_int(struct net_device *dev)
906 {
907         struct tsi108_prv_data *data = netdev_priv(dev);
908
909         /* A race could cause dev to already be scheduled, so it's not an
910          * error if that happens (and interrupts shouldn't be re-masked,
911          * because that can cause harmful races, if poll has already
912          * unmasked them but not cleared LINK_STATE_SCHED).
913          *
914          * This can happen if this code races with tsi108_poll(), which masks
915          * the interrupts after tsi108_irq_one() read the mask, but before
916          * napi_schedule is called.  It could also happen due to calls
917          * from tsi108_check_rxring().
918          */
919
920         if (napi_schedule_prep(&data->napi)) {
921                 /* Mask, rather than ack, the receive interrupts.  The ack
922                  * will happen in tsi108_poll().
923                  */
924
925                 TSI_WRITE(TSI108_EC_INTMASK,
926                                      TSI_READ(TSI108_EC_INTMASK) |
927                                      TSI108_INT_RXQUEUE0
928                                      | TSI108_INT_RXTHRESH |
929                                      TSI108_INT_RXOVERRUN | TSI108_INT_RXERROR |
930                                      TSI108_INT_RXWAIT);
931                 __napi_schedule(&data->napi);
932         } else {
933                 if (!netif_running(dev)) {
934                         /* This can happen if an interrupt occurs while the
935                          * interface is being brought down, as the START
936                          * bit is cleared before the stop function is called.
937                          *
938                          * In this case, the interrupts must be masked, or
939                          * they will continue indefinitely.
940                          *
941                          * There's a race here if the interface is brought down
942                          * and then up in rapid succession, as the device could
943                          * be made running after the above check and before
944                          * the masking below.  This will only happen if the IRQ
945                          * thread has a lower priority than the task brining
946                          * up the interface.  Fixing this race would likely
947                          * require changes in generic code.
948                          */
949
950                         TSI_WRITE(TSI108_EC_INTMASK,
951                                              TSI_READ
952                                              (TSI108_EC_INTMASK) |
953                                              TSI108_INT_RXQUEUE0 |
954                                              TSI108_INT_RXTHRESH |
955                                              TSI108_INT_RXOVERRUN |
956                                              TSI108_INT_RXERROR |
957                                              TSI108_INT_RXWAIT);
958                 }
959         }
960 }
961
962 /* If the RX ring has run out of memory, try periodically
963  * to allocate some more, as otherwise poll would never
964  * get called (apart from the initial end-of-queue condition).
965  *
966  * This is called once per second (by default) from the thread.
967  */
968
969 static void tsi108_check_rxring(struct net_device *dev)
970 {
971         struct tsi108_prv_data *data = netdev_priv(dev);
972
973         /* A poll is scheduled, as opposed to caling tsi108_refill_rx
974          * directly, so as to keep the receive path single-threaded
975          * (and thus not needing a lock).
976          */
977
978         if (netif_running(dev) && data->rxfree < TSI108_RXRING_LEN / 4)
979                 tsi108_rx_int(dev);
980 }
981
982 static void tsi108_tx_int(struct net_device *dev)
983 {
984         struct tsi108_prv_data *data = netdev_priv(dev);
985         u32 estat = TSI_READ(TSI108_EC_TXESTAT);
986
987         TSI_WRITE(TSI108_EC_TXESTAT, estat);
988         TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_TXQUEUE0 |
989                              TSI108_INT_TXIDLE | TSI108_INT_TXERROR);
990         if (estat & TSI108_EC_TXESTAT_Q0_ERR) {
991                 u32 err = TSI_READ(TSI108_EC_TXERR);
992                 TSI_WRITE(TSI108_EC_TXERR, err);
993
994                 if (err && net_ratelimit())
995                         printk(KERN_ERR "%s: TX error %x\n", dev->name, err);
996         }
997
998         if (estat & (TSI108_EC_TXESTAT_Q0_DESCINT | TSI108_EC_TXESTAT_Q0_EOQ)) {
999                 spin_lock(&data->txlock);
1000                 tsi108_complete_tx(dev);
1001                 spin_unlock(&data->txlock);
1002         }
1003 }
1004
1005
1006 static irqreturn_t tsi108_irq(int irq, void *dev_id)
1007 {
1008         struct net_device *dev = dev_id;
1009         struct tsi108_prv_data *data = netdev_priv(dev);
1010         u32 stat = TSI_READ(TSI108_EC_INTSTAT);
1011
1012         if (!(stat & TSI108_INT_ANY))
1013                 return IRQ_NONE;        /* Not our interrupt */
1014
1015         stat &= ~TSI_READ(TSI108_EC_INTMASK);
1016
1017         if (stat & (TSI108_INT_TXQUEUE0 | TSI108_INT_TXIDLE |
1018                     TSI108_INT_TXERROR))
1019                 tsi108_tx_int(dev);
1020         if (stat & (TSI108_INT_RXQUEUE0 | TSI108_INT_RXTHRESH |
1021                     TSI108_INT_RXWAIT | TSI108_INT_RXOVERRUN |
1022                     TSI108_INT_RXERROR))
1023                 tsi108_rx_int(dev);
1024
1025         if (stat & TSI108_INT_SFN) {
1026                 if (net_ratelimit())
1027                         printk(KERN_DEBUG "%s: SFN error\n", dev->name);
1028                 TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_SFN);
1029         }
1030
1031         if (stat & TSI108_INT_STATCARRY) {
1032                 tsi108_stat_carry(dev);
1033                 TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_STATCARRY);
1034         }
1035
1036         return IRQ_HANDLED;
1037 }
1038
1039 static void tsi108_stop_ethernet(struct net_device *dev)
1040 {
1041         struct tsi108_prv_data *data = netdev_priv(dev);
1042         int i = 1000;
1043         /* Disable all TX and RX queues ... */
1044         TSI_WRITE(TSI108_EC_TXCTRL, 0);
1045         TSI_WRITE(TSI108_EC_RXCTRL, 0);
1046
1047         /* ...and wait for them to become idle */
1048         while(i--) {
1049                 if(!(TSI_READ(TSI108_EC_TXSTAT) & TSI108_EC_TXSTAT_ACTIVE))
1050                         break;
1051                 udelay(10);
1052         }
1053         i = 1000;
1054         while(i--){
1055                 if(!(TSI_READ(TSI108_EC_RXSTAT) & TSI108_EC_RXSTAT_ACTIVE))
1056                         return;
1057                 udelay(10);
1058         }
1059         printk(KERN_ERR "%s function time out\n", __func__);
1060 }
1061
1062 static void tsi108_reset_ether(struct tsi108_prv_data * data)
1063 {
1064         TSI_WRITE(TSI108_MAC_CFG1, TSI108_MAC_CFG1_SOFTRST);
1065         udelay(100);
1066         TSI_WRITE(TSI108_MAC_CFG1, 0);
1067
1068         TSI_WRITE(TSI108_EC_PORTCTRL, TSI108_EC_PORTCTRL_STATRST);
1069         udelay(100);
1070         TSI_WRITE(TSI108_EC_PORTCTRL,
1071                              TSI_READ(TSI108_EC_PORTCTRL) &
1072                              ~TSI108_EC_PORTCTRL_STATRST);
1073
1074         TSI_WRITE(TSI108_EC_TXCFG, TSI108_EC_TXCFG_RST);
1075         udelay(100);
1076         TSI_WRITE(TSI108_EC_TXCFG,
1077                              TSI_READ(TSI108_EC_TXCFG) &
1078                              ~TSI108_EC_TXCFG_RST);
1079
1080         TSI_WRITE(TSI108_EC_RXCFG, TSI108_EC_RXCFG_RST);
1081         udelay(100);
1082         TSI_WRITE(TSI108_EC_RXCFG,
1083                              TSI_READ(TSI108_EC_RXCFG) &
1084                              ~TSI108_EC_RXCFG_RST);
1085
1086         TSI_WRITE(TSI108_MAC_MII_MGMT_CFG,
1087                              TSI_READ(TSI108_MAC_MII_MGMT_CFG) |
1088                              TSI108_MAC_MII_MGMT_RST);
1089         udelay(100);
1090         TSI_WRITE(TSI108_MAC_MII_MGMT_CFG,
1091                              (TSI_READ(TSI108_MAC_MII_MGMT_CFG) &
1092                              ~(TSI108_MAC_MII_MGMT_RST |
1093                                TSI108_MAC_MII_MGMT_CLK)) | 0x07);
1094 }
1095
1096 static int tsi108_get_mac(struct net_device *dev)
1097 {
1098         struct tsi108_prv_data *data = netdev_priv(dev);
1099         u32 word1 = TSI_READ(TSI108_MAC_ADDR1);
1100         u32 word2 = TSI_READ(TSI108_MAC_ADDR2);
1101
1102         /* Note that the octets are reversed from what the manual says,
1103          * producing an even weirder ordering...
1104          */
1105         if (word2 == 0 && word1 == 0) {
1106                 dev->dev_addr[0] = 0x00;
1107                 dev->dev_addr[1] = 0x06;
1108                 dev->dev_addr[2] = 0xd2;
1109                 dev->dev_addr[3] = 0x00;
1110                 dev->dev_addr[4] = 0x00;
1111                 if (0x8 == data->phy)
1112                         dev->dev_addr[5] = 0x01;
1113                 else
1114                         dev->dev_addr[5] = 0x02;
1115
1116                 word2 = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 24);
1117
1118                 word1 = (dev->dev_addr[2] << 0) | (dev->dev_addr[3] << 8) |
1119                     (dev->dev_addr[4] << 16) | (dev->dev_addr[5] << 24);
1120
1121                 TSI_WRITE(TSI108_MAC_ADDR1, word1);
1122                 TSI_WRITE(TSI108_MAC_ADDR2, word2);
1123         } else {
1124                 dev->dev_addr[0] = (word2 >> 16) & 0xff;
1125                 dev->dev_addr[1] = (word2 >> 24) & 0xff;
1126                 dev->dev_addr[2] = (word1 >> 0) & 0xff;
1127                 dev->dev_addr[3] = (word1 >> 8) & 0xff;
1128                 dev->dev_addr[4] = (word1 >> 16) & 0xff;
1129                 dev->dev_addr[5] = (word1 >> 24) & 0xff;
1130         }
1131
1132         if (!is_valid_ether_addr(dev->dev_addr)) {
1133                 printk(KERN_ERR
1134                        "%s: Invalid MAC address. word1: %08x, word2: %08x\n",
1135                        dev->name, word1, word2);
1136                 return -EINVAL;
1137         }
1138
1139         return 0;
1140 }
1141
1142 static int tsi108_set_mac(struct net_device *dev, void *addr)
1143 {
1144         struct tsi108_prv_data *data = netdev_priv(dev);
1145         u32 word1, word2;
1146         int i;
1147
1148         if (!is_valid_ether_addr(addr))
1149                 return -EINVAL;
1150
1151         for (i = 0; i < 6; i++)
1152                 /* +2 is for the offset of the HW addr type */
1153                 dev->dev_addr[i] = ((unsigned char *)addr)[i + 2];
1154
1155         word2 = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 24);
1156
1157         word1 = (dev->dev_addr[2] << 0) | (dev->dev_addr[3] << 8) |
1158             (dev->dev_addr[4] << 16) | (dev->dev_addr[5] << 24);
1159
1160         spin_lock_irq(&data->misclock);
1161         TSI_WRITE(TSI108_MAC_ADDR1, word1);
1162         TSI_WRITE(TSI108_MAC_ADDR2, word2);
1163         spin_lock(&data->txlock);
1164
1165         if (data->txfree && data->link_up)
1166                 netif_wake_queue(dev);
1167
1168         spin_unlock(&data->txlock);
1169         spin_unlock_irq(&data->misclock);
1170         return 0;
1171 }
1172
1173 /* Protected by dev->xmit_lock. */
1174 static void tsi108_set_rx_mode(struct net_device *dev)
1175 {
1176         struct tsi108_prv_data *data = netdev_priv(dev);
1177         u32 rxcfg = TSI_READ(TSI108_EC_RXCFG);
1178
1179         if (dev->flags & IFF_PROMISC) {
1180                 rxcfg &= ~(TSI108_EC_RXCFG_UC_HASH | TSI108_EC_RXCFG_MC_HASH);
1181                 rxcfg |= TSI108_EC_RXCFG_UFE | TSI108_EC_RXCFG_MFE;
1182                 goto out;
1183         }
1184
1185         rxcfg &= ~(TSI108_EC_RXCFG_UFE | TSI108_EC_RXCFG_MFE);
1186
1187         if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) {
1188                 int i;
1189                 struct netdev_hw_addr *ha;
1190                 rxcfg |= TSI108_EC_RXCFG_MFE | TSI108_EC_RXCFG_MC_HASH;
1191
1192                 memset(data->mc_hash, 0, sizeof(data->mc_hash));
1193
1194                 netdev_for_each_mc_addr(ha, dev) {
1195                         u32 hash, crc;
1196
1197                         crc = ether_crc(6, ha->addr);
1198                         hash = crc >> 23;
1199                         __set_bit(hash, &data->mc_hash[0]);
1200                 }
1201
1202                 TSI_WRITE(TSI108_EC_HASHADDR,
1203                                      TSI108_EC_HASHADDR_AUTOINC |
1204                                      TSI108_EC_HASHADDR_MCAST);
1205
1206                 for (i = 0; i < 16; i++) {
1207                         /* The manual says that the hardware may drop
1208                          * back-to-back writes to the data register.
1209                          */
1210                         udelay(1);
1211                         TSI_WRITE(TSI108_EC_HASHDATA,
1212                                              data->mc_hash[i]);
1213                 }
1214         }
1215
1216       out:
1217         TSI_WRITE(TSI108_EC_RXCFG, rxcfg);
1218 }
1219
1220 static void tsi108_init_phy(struct net_device *dev)
1221 {
1222         struct tsi108_prv_data *data = netdev_priv(dev);
1223         u32 i = 0;
1224         u16 phyval = 0;
1225         unsigned long flags;
1226
1227         spin_lock_irqsave(&phy_lock, flags);
1228
1229         tsi108_write_mii(data, MII_BMCR, BMCR_RESET);
1230         while (--i) {
1231                 if(!(tsi108_read_mii(data, MII_BMCR) & BMCR_RESET))
1232                         break;
1233                 udelay(10);
1234         }
1235         if (i == 0)
1236                 printk(KERN_ERR "%s function time out\n", __func__);
1237
1238         if (data->phy_type == TSI108_PHY_BCM54XX) {
1239                 tsi108_write_mii(data, 0x09, 0x0300);
1240                 tsi108_write_mii(data, 0x10, 0x1020);
1241                 tsi108_write_mii(data, 0x1c, 0x8c00);
1242         }
1243
1244         tsi108_write_mii(data,
1245                          MII_BMCR,
1246                          BMCR_ANENABLE | BMCR_ANRESTART);
1247         while (tsi108_read_mii(data, MII_BMCR) & BMCR_ANRESTART)
1248                 cpu_relax();
1249
1250         /* Set G/MII mode and receive clock select in TBI control #2.  The
1251          * second port won't work if this isn't done, even though we don't
1252          * use TBI mode.
1253          */
1254
1255         tsi108_write_tbi(data, 0x11, 0x30);
1256
1257         /* FIXME: It seems to take more than 2 back-to-back reads to the
1258          * PHY_STAT register before the link up status bit is set.
1259          */
1260
1261         data->link_up = 0;
1262
1263         while (!((phyval = tsi108_read_mii(data, MII_BMSR)) &
1264                  BMSR_LSTATUS)) {
1265                 if (i++ > (MII_READ_DELAY / 10)) {
1266                         break;
1267                 }
1268                 spin_unlock_irqrestore(&phy_lock, flags);
1269                 msleep(10);
1270                 spin_lock_irqsave(&phy_lock, flags);
1271         }
1272
1273         data->mii_if.supports_gmii = mii_check_gmii_support(&data->mii_if);
1274         printk(KERN_DEBUG "PHY_STAT reg contains %08x\n", phyval);
1275         data->phy_ok = 1;
1276         data->init_media = 1;
1277         spin_unlock_irqrestore(&phy_lock, flags);
1278 }
1279
1280 static void tsi108_kill_phy(struct net_device *dev)
1281 {
1282         struct tsi108_prv_data *data = netdev_priv(dev);
1283         unsigned long flags;
1284
1285         spin_lock_irqsave(&phy_lock, flags);
1286         tsi108_write_mii(data, MII_BMCR, BMCR_PDOWN);
1287         data->phy_ok = 0;
1288         spin_unlock_irqrestore(&phy_lock, flags);
1289 }
1290
1291 static int tsi108_open(struct net_device *dev)
1292 {
1293         int i;
1294         struct tsi108_prv_data *data = netdev_priv(dev);
1295         unsigned int rxring_size = TSI108_RXRING_LEN * sizeof(rx_desc);
1296         unsigned int txring_size = TSI108_TXRING_LEN * sizeof(tx_desc);
1297
1298         i = request_irq(data->irq_num, tsi108_irq, 0, dev->name, dev);
1299         if (i != 0) {
1300                 printk(KERN_ERR "tsi108_eth%d: Could not allocate IRQ%d.\n",
1301                        data->id, data->irq_num);
1302                 return i;
1303         } else {
1304                 dev->irq = data->irq_num;
1305                 printk(KERN_NOTICE
1306                        "tsi108_open : Port %d Assigned IRQ %d to %s\n",
1307                        data->id, dev->irq, dev->name);
1308         }
1309
1310         data->rxring = dma_alloc_coherent(NULL, rxring_size,
1311                         &data->rxdma, GFP_KERNEL);
1312
1313         if (!data->rxring) {
1314                 printk(KERN_DEBUG
1315                        "TSI108_ETH: failed to allocate memory for rxring!\n");
1316                 return -ENOMEM;
1317         } else {
1318                 memset(data->rxring, 0, rxring_size);
1319         }
1320
1321         data->txring = dma_alloc_coherent(NULL, txring_size,
1322                         &data->txdma, GFP_KERNEL);
1323
1324         if (!data->txring) {
1325                 printk(KERN_DEBUG
1326                        "TSI108_ETH: failed to allocate memory for txring!\n");
1327                 pci_free_consistent(0, rxring_size, data->rxring, data->rxdma);
1328                 return -ENOMEM;
1329         } else {
1330                 memset(data->txring, 0, txring_size);
1331         }
1332
1333         for (i = 0; i < TSI108_RXRING_LEN; i++) {
1334                 data->rxring[i].next0 = data->rxdma + (i + 1) * sizeof(rx_desc);
1335                 data->rxring[i].blen = TSI108_RXBUF_SIZE;
1336                 data->rxring[i].vlan = 0;
1337         }
1338
1339         data->rxring[TSI108_RXRING_LEN - 1].next0 = data->rxdma;
1340
1341         data->rxtail = 0;
1342         data->rxhead = 0;
1343
1344         for (i = 0; i < TSI108_RXRING_LEN; i++) {
1345                 struct sk_buff *skb;
1346
1347                 skb = netdev_alloc_skb_ip_align(dev, TSI108_RXBUF_SIZE);
1348                 if (!skb) {
1349                         /* Bah.  No memory for now, but maybe we'll get
1350                          * some more later.
1351                          * For now, we'll live with the smaller ring.
1352                          */
1353                         printk(KERN_WARNING
1354                                "%s: Could only allocate %d receive skb(s).\n",
1355                                dev->name, i);
1356                         data->rxhead = i;
1357                         break;
1358                 }
1359
1360                 data->rxskbs[i] = skb;
1361                 data->rxskbs[i] = skb;
1362                 data->rxring[i].buf0 = virt_to_phys(data->rxskbs[i]->data);
1363                 data->rxring[i].misc = TSI108_RX_OWN | TSI108_RX_INT;
1364         }
1365
1366         data->rxfree = i;
1367         TSI_WRITE(TSI108_EC_RXQ_PTRLOW, data->rxdma);
1368
1369         for (i = 0; i < TSI108_TXRING_LEN; i++) {
1370                 data->txring[i].next0 = data->txdma + (i + 1) * sizeof(tx_desc);
1371                 data->txring[i].misc = 0;
1372         }
1373
1374         data->txring[TSI108_TXRING_LEN - 1].next0 = data->txdma;
1375         data->txtail = 0;
1376         data->txhead = 0;
1377         data->txfree = TSI108_TXRING_LEN;
1378         TSI_WRITE(TSI108_EC_TXQ_PTRLOW, data->txdma);
1379         tsi108_init_phy(dev);
1380
1381         napi_enable(&data->napi);
1382
1383         setup_timer(&data->timer, tsi108_timed_checker, (unsigned long)dev);
1384         mod_timer(&data->timer, jiffies + 1);
1385
1386         tsi108_restart_rx(data, dev);
1387
1388         TSI_WRITE(TSI108_EC_INTSTAT, ~0);
1389
1390         TSI_WRITE(TSI108_EC_INTMASK,
1391                              ~(TSI108_INT_TXQUEUE0 | TSI108_INT_RXERROR |
1392                                TSI108_INT_RXTHRESH | TSI108_INT_RXQUEUE0 |
1393                                TSI108_INT_RXOVERRUN | TSI108_INT_RXWAIT |
1394                                TSI108_INT_SFN | TSI108_INT_STATCARRY));
1395
1396         TSI_WRITE(TSI108_MAC_CFG1,
1397                              TSI108_MAC_CFG1_RXEN | TSI108_MAC_CFG1_TXEN);
1398         netif_start_queue(dev);
1399         return 0;
1400 }
1401
1402 static int tsi108_close(struct net_device *dev)
1403 {
1404         struct tsi108_prv_data *data = netdev_priv(dev);
1405
1406         netif_stop_queue(dev);
1407         napi_disable(&data->napi);
1408
1409         del_timer_sync(&data->timer);
1410
1411         tsi108_stop_ethernet(dev);
1412         tsi108_kill_phy(dev);
1413         TSI_WRITE(TSI108_EC_INTMASK, ~0);
1414         TSI_WRITE(TSI108_MAC_CFG1, 0);
1415
1416         /* Check for any pending TX packets, and drop them. */
1417
1418         while (!data->txfree || data->txhead != data->txtail) {
1419                 int tx = data->txtail;
1420                 struct sk_buff *skb;
1421                 skb = data->txskbs[tx];
1422                 data->txtail = (data->txtail + 1) % TSI108_TXRING_LEN;
1423                 data->txfree++;
1424                 dev_kfree_skb(skb);
1425         }
1426
1427         free_irq(data->irq_num, dev);
1428
1429         /* Discard the RX ring. */
1430
1431         while (data->rxfree) {
1432                 int rx = data->rxtail;
1433                 struct sk_buff *skb;
1434
1435                 skb = data->rxskbs[rx];
1436                 data->rxtail = (data->rxtail + 1) % TSI108_RXRING_LEN;
1437                 data->rxfree--;
1438                 dev_kfree_skb(skb);
1439         }
1440
1441         dma_free_coherent(0,
1442                             TSI108_RXRING_LEN * sizeof(rx_desc),
1443                             data->rxring, data->rxdma);
1444         dma_free_coherent(0,
1445                             TSI108_TXRING_LEN * sizeof(tx_desc),
1446                             data->txring, data->txdma);
1447
1448         return 0;
1449 }
1450
1451 static void tsi108_init_mac(struct net_device *dev)
1452 {
1453         struct tsi108_prv_data *data = netdev_priv(dev);
1454
1455         TSI_WRITE(TSI108_MAC_CFG2, TSI108_MAC_CFG2_DFLT_PREAMBLE |
1456                              TSI108_MAC_CFG2_PADCRC);
1457
1458         TSI_WRITE(TSI108_EC_TXTHRESH,
1459                              (192 << TSI108_EC_TXTHRESH_STARTFILL) |
1460                              (192 << TSI108_EC_TXTHRESH_STOPFILL));
1461
1462         TSI_WRITE(TSI108_STAT_CARRYMASK1,
1463                              ~(TSI108_STAT_CARRY1_RXBYTES |
1464                                TSI108_STAT_CARRY1_RXPKTS |
1465                                TSI108_STAT_CARRY1_RXFCS |
1466                                TSI108_STAT_CARRY1_RXMCAST |
1467                                TSI108_STAT_CARRY1_RXALIGN |
1468                                TSI108_STAT_CARRY1_RXLENGTH |
1469                                TSI108_STAT_CARRY1_RXRUNT |
1470                                TSI108_STAT_CARRY1_RXJUMBO |
1471                                TSI108_STAT_CARRY1_RXFRAG |
1472                                TSI108_STAT_CARRY1_RXJABBER |
1473                                TSI108_STAT_CARRY1_RXDROP));
1474
1475         TSI_WRITE(TSI108_STAT_CARRYMASK2,
1476                              ~(TSI108_STAT_CARRY2_TXBYTES |
1477                                TSI108_STAT_CARRY2_TXPKTS |
1478                                TSI108_STAT_CARRY2_TXEXDEF |
1479                                TSI108_STAT_CARRY2_TXEXCOL |
1480                                TSI108_STAT_CARRY2_TXTCOL |
1481                                TSI108_STAT_CARRY2_TXPAUSE));
1482
1483         TSI_WRITE(TSI108_EC_PORTCTRL, TSI108_EC_PORTCTRL_STATEN);
1484         TSI_WRITE(TSI108_MAC_CFG1, 0);
1485
1486         TSI_WRITE(TSI108_EC_RXCFG,
1487                              TSI108_EC_RXCFG_SE | TSI108_EC_RXCFG_BFE);
1488
1489         TSI_WRITE(TSI108_EC_TXQ_CFG, TSI108_EC_TXQ_CFG_DESC_INT |
1490                              TSI108_EC_TXQ_CFG_EOQ_OWN_INT |
1491                              TSI108_EC_TXQ_CFG_WSWP | (TSI108_PBM_PORT <<
1492                                                 TSI108_EC_TXQ_CFG_SFNPORT));
1493
1494         TSI_WRITE(TSI108_EC_RXQ_CFG, TSI108_EC_RXQ_CFG_DESC_INT |
1495                              TSI108_EC_RXQ_CFG_EOQ_OWN_INT |
1496                              TSI108_EC_RXQ_CFG_WSWP | (TSI108_PBM_PORT <<
1497                                                 TSI108_EC_RXQ_CFG_SFNPORT));
1498
1499         TSI_WRITE(TSI108_EC_TXQ_BUFCFG,
1500                              TSI108_EC_TXQ_BUFCFG_BURST256 |
1501                              TSI108_EC_TXQ_BUFCFG_BSWP | (TSI108_PBM_PORT <<
1502                                                 TSI108_EC_TXQ_BUFCFG_SFNPORT));
1503
1504         TSI_WRITE(TSI108_EC_RXQ_BUFCFG,
1505                              TSI108_EC_RXQ_BUFCFG_BURST256 |
1506                              TSI108_EC_RXQ_BUFCFG_BSWP | (TSI108_PBM_PORT <<
1507                                                 TSI108_EC_RXQ_BUFCFG_SFNPORT));
1508
1509         TSI_WRITE(TSI108_EC_INTMASK, ~0);
1510 }
1511
1512 static int tsi108_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1513 {
1514         struct tsi108_prv_data *data = netdev_priv(dev);
1515         unsigned long flags;
1516         int rc;
1517
1518         spin_lock_irqsave(&data->txlock, flags);
1519         rc = mii_ethtool_gset(&data->mii_if, cmd);
1520         spin_unlock_irqrestore(&data->txlock, flags);
1521
1522         return rc;
1523 }
1524
1525 static int tsi108_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1526 {
1527         struct tsi108_prv_data *data = netdev_priv(dev);
1528         unsigned long flags;
1529         int rc;
1530
1531         spin_lock_irqsave(&data->txlock, flags);
1532         rc = mii_ethtool_sset(&data->mii_if, cmd);
1533         spin_unlock_irqrestore(&data->txlock, flags);
1534
1535         return rc;
1536 }
1537
1538 static int tsi108_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1539 {
1540         struct tsi108_prv_data *data = netdev_priv(dev);
1541         if (!netif_running(dev))
1542                 return -EINVAL;
1543         return generic_mii_ioctl(&data->mii_if, if_mii(rq), cmd, NULL);
1544 }
1545
1546 static const struct ethtool_ops tsi108_ethtool_ops = {
1547         .get_link       = ethtool_op_get_link,
1548         .get_settings   = tsi108_get_settings,
1549         .set_settings   = tsi108_set_settings,
1550 };
1551
1552 static const struct net_device_ops tsi108_netdev_ops = {
1553         .ndo_open               = tsi108_open,
1554         .ndo_stop               = tsi108_close,
1555         .ndo_start_xmit         = tsi108_send_packet,
1556         .ndo_set_multicast_list = tsi108_set_rx_mode,
1557         .ndo_get_stats          = tsi108_get_stats,
1558         .ndo_do_ioctl           = tsi108_do_ioctl,
1559         .ndo_set_mac_address    = tsi108_set_mac,
1560         .ndo_validate_addr      = eth_validate_addr,
1561         .ndo_change_mtu         = eth_change_mtu,
1562 };
1563
1564 static int
1565 tsi108_init_one(struct platform_device *pdev)
1566 {
1567         struct net_device *dev = NULL;
1568         struct tsi108_prv_data *data = NULL;
1569         hw_info *einfo;
1570         int err = 0;
1571
1572         einfo = pdev->dev.platform_data;
1573
1574         if (NULL == einfo) {
1575                 printk(KERN_ERR "tsi-eth %d: Missing additional data!\n",
1576                        pdev->id);
1577                 return -ENODEV;
1578         }
1579
1580         /* Create an ethernet device instance */
1581
1582         dev = alloc_etherdev(sizeof(struct tsi108_prv_data));
1583         if (!dev) {
1584                 printk("tsi108_eth: Could not allocate a device structure\n");
1585                 return -ENOMEM;
1586         }
1587
1588         printk("tsi108_eth%d: probe...\n", pdev->id);
1589         data = netdev_priv(dev);
1590         data->dev = dev;
1591
1592         pr_debug("tsi108_eth%d:regs:phyresgs:phy:irq_num=0x%x:0x%x:0x%x:0x%x\n",
1593                         pdev->id, einfo->regs, einfo->phyregs,
1594                         einfo->phy, einfo->irq_num);
1595
1596         data->regs = ioremap(einfo->regs, 0x400);
1597         if (NULL == data->regs) {
1598                 err = -ENOMEM;
1599                 goto regs_fail;
1600         }
1601
1602         data->phyregs = ioremap(einfo->phyregs, 0x400);
1603         if (NULL == data->phyregs) {
1604                 err = -ENOMEM;
1605                 goto regs_fail;
1606         }
1607 /* MII setup */
1608         data->mii_if.dev = dev;
1609         data->mii_if.mdio_read = tsi108_mdio_read;
1610         data->mii_if.mdio_write = tsi108_mdio_write;
1611         data->mii_if.phy_id = einfo->phy;
1612         data->mii_if.phy_id_mask = 0x1f;
1613         data->mii_if.reg_num_mask = 0x1f;
1614
1615         data->phy = einfo->phy;
1616         data->phy_type = einfo->phy_type;
1617         data->irq_num = einfo->irq_num;
1618         data->id = pdev->id;
1619         netif_napi_add(dev, &data->napi, tsi108_poll, 64);
1620         dev->netdev_ops = &tsi108_netdev_ops;
1621         dev->ethtool_ops = &tsi108_ethtool_ops;
1622
1623         /* Apparently, the Linux networking code won't use scatter-gather
1624          * if the hardware doesn't do checksums.  However, it's faster
1625          * to checksum in place and use SG, as (among other reasons)
1626          * the cache won't be dirtied (which then has to be flushed
1627          * before DMA).  The checksumming is done by the driver (via
1628          * a new function skb_csum_dev() in net/core/skbuff.c).
1629          */
1630
1631         dev->features = NETIF_F_HIGHDMA;
1632
1633         spin_lock_init(&data->txlock);
1634         spin_lock_init(&data->misclock);
1635
1636         tsi108_reset_ether(data);
1637         tsi108_kill_phy(dev);
1638
1639         if ((err = tsi108_get_mac(dev)) != 0) {
1640                 printk(KERN_ERR "%s: Invalid MAC address.  Please correct.\n",
1641                        dev->name);
1642                 goto register_fail;
1643         }
1644
1645         tsi108_init_mac(dev);
1646         err = register_netdev(dev);
1647         if (err) {
1648                 printk(KERN_ERR "%s: Cannot register net device, aborting.\n",
1649                                 dev->name);
1650                 goto register_fail;
1651         }
1652
1653         platform_set_drvdata(pdev, dev);
1654         printk(KERN_INFO "%s: Tsi108 Gigabit Ethernet, MAC: %pM\n",
1655                dev->name, dev->dev_addr);
1656 #ifdef DEBUG
1657         data->msg_enable = DEBUG;
1658         dump_eth_one(dev);
1659 #endif
1660
1661         return 0;
1662
1663 register_fail:
1664         iounmap(data->regs);
1665         iounmap(data->phyregs);
1666
1667 regs_fail:
1668         free_netdev(dev);
1669         return err;
1670 }
1671
1672 /* There's no way to either get interrupts from the PHY when
1673  * something changes, or to have the Tsi108 automatically communicate
1674  * with the PHY to reconfigure itself.
1675  *
1676  * Thus, we have to do it using a timer.
1677  */
1678
1679 static void tsi108_timed_checker(unsigned long dev_ptr)
1680 {
1681         struct net_device *dev = (struct net_device *)dev_ptr;
1682         struct tsi108_prv_data *data = netdev_priv(dev);
1683
1684         tsi108_check_phy(dev);
1685         tsi108_check_rxring(dev);
1686         mod_timer(&data->timer, jiffies + CHECK_PHY_INTERVAL);
1687 }
1688
1689 static int tsi108_ether_init(void)
1690 {
1691         int ret;
1692         ret = platform_driver_register (&tsi_eth_driver);
1693         if (ret < 0){
1694                 printk("tsi108_ether_init: error initializing ethernet "
1695                        "device\n");
1696                 return ret;
1697         }
1698         return 0;
1699 }
1700
1701 static int tsi108_ether_remove(struct platform_device *pdev)
1702 {
1703         struct net_device *dev = platform_get_drvdata(pdev);
1704         struct tsi108_prv_data *priv = netdev_priv(dev);
1705
1706         unregister_netdev(dev);
1707         tsi108_stop_ethernet(dev);
1708         platform_set_drvdata(pdev, NULL);
1709         iounmap(priv->regs);
1710         iounmap(priv->phyregs);
1711         free_netdev(dev);
1712
1713         return 0;
1714 }
1715 static void tsi108_ether_exit(void)
1716 {
1717         platform_driver_unregister(&tsi_eth_driver);
1718 }
1719
1720 module_init(tsi108_ether_init);
1721 module_exit(tsi108_ether_exit);
1722
1723 MODULE_AUTHOR("Tundra Semiconductor Corporation");
1724 MODULE_DESCRIPTION("Tsi108 Gigabit Ethernet driver");
1725 MODULE_LICENSE("GPL");
1726 MODULE_ALIAS("platform:tsi-ethernet");