[PATCH] remove many unneeded #includes of sched.h
[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/skbuff.h>
40 #include <linux/slab.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/etherdevice.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         unsigned int phy;               /* Index of PHY for this interface */
83         unsigned int irq_num;
84         unsigned int id;
85
86         struct timer_list timer;/* Timer that triggers the check phy function */
87         unsigned int rxtail;    /* Next entry in rxring to read */
88         unsigned int rxhead;    /* Next entry in rxring to give a new buffer */
89         unsigned int rxfree;    /* Number of free, allocated RX buffers */
90
91         unsigned int rxpending; /* Non-zero if there are still descriptors
92                                  * to be processed from a previous descriptor
93                                  * interrupt condition that has been cleared */
94
95         unsigned int txtail;    /* Next TX descriptor to check status on */
96         unsigned int txhead;    /* Next TX descriptor to use */
97
98         /* Number of free TX descriptors.  This could be calculated from
99          * rxhead and rxtail if one descriptor were left unused to disambiguate
100          * full and empty conditions, but it's simpler to just keep track
101          * explicitly. */
102
103         unsigned int txfree;
104
105         unsigned int phy_ok;            /* The PHY is currently powered on. */
106
107         /* PHY status (duplex is 1 for half, 2 for full,
108          * so that the default 0 indicates that neither has
109          * yet been configured). */
110
111         unsigned int link_up;
112         unsigned int speed;
113         unsigned int duplex;
114
115         tx_desc *txring;
116         rx_desc *rxring;
117         struct sk_buff *txskbs[TSI108_TXRING_LEN];
118         struct sk_buff *rxskbs[TSI108_RXRING_LEN];
119
120         dma_addr_t txdma, rxdma;
121
122         /* txlock nests in misclock and phy_lock */
123
124         spinlock_t txlock, misclock;
125
126         /* stats is used to hold the upper bits of each hardware counter,
127          * and tmpstats is used to hold the full values for returning
128          * to the caller of get_stats().  They must be separate in case
129          * an overflow interrupt occurs before the stats are consumed.
130          */
131
132         struct net_device_stats stats;
133         struct net_device_stats tmpstats;
134
135         /* These stats are kept separate in hardware, thus require individual
136          * fields for handling carry.  They are combined in get_stats.
137          */
138
139         unsigned long rx_fcs;   /* Add to rx_frame_errors */
140         unsigned long rx_short_fcs;     /* Add to rx_frame_errors */
141         unsigned long rx_long_fcs;      /* Add to rx_frame_errors */
142         unsigned long rx_underruns;     /* Add to rx_length_errors */
143         unsigned long rx_overruns;      /* Add to rx_length_errors */
144
145         unsigned long tx_coll_abort;    /* Add to tx_aborted_errors/collisions */
146         unsigned long tx_pause_drop;    /* Add to tx_aborted_errors */
147
148         unsigned long mc_hash[16];
149         u32 msg_enable;                 /* debug message level */
150         struct mii_if_info mii_if;
151         unsigned int init_media;
152 };
153
154 /* Structure for a device driver */
155
156 static struct platform_driver tsi_eth_driver = {
157         .probe = tsi108_init_one,
158         .remove = tsi108_ether_remove,
159         .driver = {
160                 .name = "tsi-ethernet",
161         },
162 };
163
164 static void tsi108_timed_checker(unsigned long dev_ptr);
165
166 static void dump_eth_one(struct net_device *dev)
167 {
168         struct tsi108_prv_data *data = netdev_priv(dev);
169
170         printk("Dumping %s...\n", dev->name);
171         printk("intstat %x intmask %x phy_ok %d"
172                " link %d speed %d duplex %d\n",
173                TSI_READ(TSI108_EC_INTSTAT),
174                TSI_READ(TSI108_EC_INTMASK), data->phy_ok,
175                data->link_up, data->speed, data->duplex);
176
177         printk("TX: head %d, tail %d, free %d, stat %x, estat %x, err %x\n",
178                data->txhead, data->txtail, data->txfree,
179                TSI_READ(TSI108_EC_TXSTAT),
180                TSI_READ(TSI108_EC_TXESTAT),
181                TSI_READ(TSI108_EC_TXERR));
182
183         printk("RX: head %d, tail %d, free %d, stat %x,"
184                " estat %x, err %x, pending %d\n\n",
185                data->rxhead, data->rxtail, data->rxfree,
186                TSI_READ(TSI108_EC_RXSTAT),
187                TSI_READ(TSI108_EC_RXESTAT),
188                TSI_READ(TSI108_EC_RXERR), data->rxpending);
189 }
190
191 /* Synchronization is needed between the thread and up/down events.
192  * Note that the PHY is accessed through the same registers for both
193  * interfaces, so this can't be made interface-specific.
194  */
195
196 static DEFINE_SPINLOCK(phy_lock);
197
198 static int tsi108_read_mii(struct tsi108_prv_data *data, int reg)
199 {
200         unsigned i;
201
202         TSI_WRITE_PHY(TSI108_MAC_MII_ADDR,
203                                 (data->phy << TSI108_MAC_MII_ADDR_PHY) |
204                                 (reg << TSI108_MAC_MII_ADDR_REG));
205         TSI_WRITE_PHY(TSI108_MAC_MII_CMD, 0);
206         TSI_WRITE_PHY(TSI108_MAC_MII_CMD, TSI108_MAC_MII_CMD_READ);
207         for (i = 0; i < 100; i++) {
208                 if (!(TSI_READ_PHY(TSI108_MAC_MII_IND) &
209                       (TSI108_MAC_MII_IND_NOTVALID | TSI108_MAC_MII_IND_BUSY)))
210                         break;
211                 udelay(10);
212         }
213
214         if (i == 100)
215                 return 0xffff;
216         else
217                 return (TSI_READ_PHY(TSI108_MAC_MII_DATAIN));
218 }
219
220 static void tsi108_write_mii(struct tsi108_prv_data *data,
221                                 int reg, u16 val)
222 {
223         unsigned i = 100;
224         TSI_WRITE_PHY(TSI108_MAC_MII_ADDR,
225                                 (data->phy << TSI108_MAC_MII_ADDR_PHY) |
226                                 (reg << TSI108_MAC_MII_ADDR_REG));
227         TSI_WRITE_PHY(TSI108_MAC_MII_DATAOUT, val);
228         while (i--) {
229                 if(!(TSI_READ_PHY(TSI108_MAC_MII_IND) &
230                         TSI108_MAC_MII_IND_BUSY))
231                         break;
232                 udelay(10);
233         }
234 }
235
236 static int tsi108_mdio_read(struct net_device *dev, int addr, int reg)
237 {
238         struct tsi108_prv_data *data = netdev_priv(dev);
239         return tsi108_read_mii(data, reg);
240 }
241
242 static void tsi108_mdio_write(struct net_device *dev, int addr, int reg, int val)
243 {
244         struct tsi108_prv_data *data = netdev_priv(dev);
245         tsi108_write_mii(data, reg, val);
246 }
247
248 static inline void tsi108_write_tbi(struct tsi108_prv_data *data,
249                                         int reg, u16 val)
250 {
251         unsigned i = 1000;
252         TSI_WRITE(TSI108_MAC_MII_ADDR,
253                              (0x1e << TSI108_MAC_MII_ADDR_PHY)
254                              | (reg << TSI108_MAC_MII_ADDR_REG));
255         TSI_WRITE(TSI108_MAC_MII_DATAOUT, val);
256         while(i--) {
257                 if(!(TSI_READ(TSI108_MAC_MII_IND) & TSI108_MAC_MII_IND_BUSY))
258                         return;
259                 udelay(10);
260         }
261         printk(KERN_ERR "%s function time out \n", __FUNCTION__);
262 }
263
264 static int mii_speed(struct mii_if_info *mii)
265 {
266         int advert, lpa, val, media;
267         int lpa2 = 0;
268         int speed;
269
270         if (!mii_link_ok(mii))
271                 return 0;
272
273         val = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_BMSR);
274         if ((val & BMSR_ANEGCOMPLETE) == 0)
275                 return 0;
276
277         advert = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_ADVERTISE);
278         lpa = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_LPA);
279         media = mii_nway_result(advert & lpa);
280
281         if (mii->supports_gmii)
282                 lpa2 = mii->mdio_read(mii->dev, mii->phy_id, MII_STAT1000);
283
284         speed = lpa2 & (LPA_1000FULL | LPA_1000HALF) ? 1000 :
285                         (media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? 100 : 10);
286         return speed;
287 }
288
289 static void tsi108_check_phy(struct net_device *dev)
290 {
291         struct tsi108_prv_data *data = netdev_priv(dev);
292         u32 mac_cfg2_reg, portctrl_reg;
293         u32 duplex;
294         u32 speed;
295         unsigned long flags;
296
297         /* Do a dummy read, as for some reason the first read
298          * after a link becomes up returns link down, even if
299          * it's been a while since the link came up.
300          */
301
302         spin_lock_irqsave(&phy_lock, flags);
303
304         if (!data->phy_ok)
305                 goto out;
306
307         tsi108_read_mii(data, MII_BMSR);
308
309         duplex = mii_check_media(&data->mii_if, netif_msg_link(data), data->init_media);
310         data->init_media = 0;
311
312         if (netif_carrier_ok(dev)) {
313
314                 speed = mii_speed(&data->mii_if);
315
316                 if ((speed != data->speed) || duplex) {
317
318                         mac_cfg2_reg = TSI_READ(TSI108_MAC_CFG2);
319                         portctrl_reg = TSI_READ(TSI108_EC_PORTCTRL);
320
321                         mac_cfg2_reg &= ~TSI108_MAC_CFG2_IFACE_MASK;
322
323                         if (speed == 1000) {
324                                 mac_cfg2_reg |= TSI108_MAC_CFG2_GIG;
325                                 portctrl_reg &= ~TSI108_EC_PORTCTRL_NOGIG;
326                         } else {
327                                 mac_cfg2_reg |= TSI108_MAC_CFG2_NOGIG;
328                                 portctrl_reg |= TSI108_EC_PORTCTRL_NOGIG;
329                         }
330
331                         data->speed = speed;
332
333                         if (data->mii_if.full_duplex) {
334                                 mac_cfg2_reg |= TSI108_MAC_CFG2_FULLDUPLEX;
335                                 portctrl_reg &= ~TSI108_EC_PORTCTRL_HALFDUPLEX;
336                                 data->duplex = 2;
337                         } else {
338                                 mac_cfg2_reg &= ~TSI108_MAC_CFG2_FULLDUPLEX;
339                                 portctrl_reg |= TSI108_EC_PORTCTRL_HALFDUPLEX;
340                                 data->duplex = 1;
341                         }
342
343                         TSI_WRITE(TSI108_MAC_CFG2, mac_cfg2_reg);
344                         TSI_WRITE(TSI108_EC_PORTCTRL, portctrl_reg);
345
346                         if (data->link_up == 0) {
347                                 /* The manual says it can take 3-4 usecs for the speed change
348                                  * to take effect.
349                                  */
350                                 udelay(5);
351
352                                 spin_lock(&data->txlock);
353                                 if (is_valid_ether_addr(dev->dev_addr) && data->txfree)
354                                         netif_wake_queue(dev);
355
356                                 data->link_up = 1;
357                                 spin_unlock(&data->txlock);
358                         }
359                 }
360
361         } else {
362                 if (data->link_up == 1) {
363                         netif_stop_queue(dev);
364                         data->link_up = 0;
365                         printk(KERN_NOTICE "%s : link is down\n", dev->name);
366                 }
367
368                 goto out;
369         }
370
371
372 out:
373         spin_unlock_irqrestore(&phy_lock, flags);
374 }
375
376 static inline void
377 tsi108_stat_carry_one(int carry, int carry_bit, int carry_shift,
378                       unsigned long *upper)
379 {
380         if (carry & carry_bit)
381                 *upper += carry_shift;
382 }
383
384 static void tsi108_stat_carry(struct net_device *dev)
385 {
386         struct tsi108_prv_data *data = netdev_priv(dev);
387         u32 carry1, carry2;
388
389         spin_lock_irq(&data->misclock);
390
391         carry1 = TSI_READ(TSI108_STAT_CARRY1);
392         carry2 = TSI_READ(TSI108_STAT_CARRY2);
393
394         TSI_WRITE(TSI108_STAT_CARRY1, carry1);
395         TSI_WRITE(TSI108_STAT_CARRY2, carry2);
396
397         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXBYTES,
398                               TSI108_STAT_RXBYTES_CARRY, &data->stats.rx_bytes);
399
400         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXPKTS,
401                               TSI108_STAT_RXPKTS_CARRY,
402                               &data->stats.rx_packets);
403
404         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXFCS,
405                               TSI108_STAT_RXFCS_CARRY, &data->rx_fcs);
406
407         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXMCAST,
408                               TSI108_STAT_RXMCAST_CARRY,
409                               &data->stats.multicast);
410
411         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXALIGN,
412                               TSI108_STAT_RXALIGN_CARRY,
413                               &data->stats.rx_frame_errors);
414
415         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXLENGTH,
416                               TSI108_STAT_RXLENGTH_CARRY,
417                               &data->stats.rx_length_errors);
418
419         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXRUNT,
420                               TSI108_STAT_RXRUNT_CARRY, &data->rx_underruns);
421
422         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXJUMBO,
423                               TSI108_STAT_RXJUMBO_CARRY, &data->rx_overruns);
424
425         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXFRAG,
426                               TSI108_STAT_RXFRAG_CARRY, &data->rx_short_fcs);
427
428         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXJABBER,
429                               TSI108_STAT_RXJABBER_CARRY, &data->rx_long_fcs);
430
431         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXDROP,
432                               TSI108_STAT_RXDROP_CARRY,
433                               &data->stats.rx_missed_errors);
434
435         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXBYTES,
436                               TSI108_STAT_TXBYTES_CARRY, &data->stats.tx_bytes);
437
438         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXPKTS,
439                               TSI108_STAT_TXPKTS_CARRY,
440                               &data->stats.tx_packets);
441
442         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXEXDEF,
443                               TSI108_STAT_TXEXDEF_CARRY,
444                               &data->stats.tx_aborted_errors);
445
446         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXEXCOL,
447                               TSI108_STAT_TXEXCOL_CARRY, &data->tx_coll_abort);
448
449         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXTCOL,
450                               TSI108_STAT_TXTCOL_CARRY,
451                               &data->stats.collisions);
452
453         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXPAUSE,
454                               TSI108_STAT_TXPAUSEDROP_CARRY,
455                               &data->tx_pause_drop);
456
457         spin_unlock_irq(&data->misclock);
458 }
459
460 /* Read a stat counter atomically with respect to carries.
461  * data->misclock must be held.
462  */
463 static inline unsigned long
464 tsi108_read_stat(struct tsi108_prv_data * data, int reg, int carry_bit,
465                  int carry_shift, unsigned long *upper)
466 {
467         int carryreg;
468         unsigned long val;
469
470         if (reg < 0xb0)
471                 carryreg = TSI108_STAT_CARRY1;
472         else
473                 carryreg = TSI108_STAT_CARRY2;
474
475       again:
476         val = TSI_READ(reg) | *upper;
477
478         /* Check to see if it overflowed, but the interrupt hasn't
479          * been serviced yet.  If so, handle the carry here, and
480          * try again.
481          */
482
483         if (unlikely(TSI_READ(carryreg) & carry_bit)) {
484                 *upper += carry_shift;
485                 TSI_WRITE(carryreg, carry_bit);
486                 goto again;
487         }
488
489         return val;
490 }
491
492 static struct net_device_stats *tsi108_get_stats(struct net_device *dev)
493 {
494         unsigned long excol;
495
496         struct tsi108_prv_data *data = netdev_priv(dev);
497         spin_lock_irq(&data->misclock);
498
499         data->tmpstats.rx_packets =
500             tsi108_read_stat(data, TSI108_STAT_RXPKTS,
501                              TSI108_STAT_CARRY1_RXPKTS,
502                              TSI108_STAT_RXPKTS_CARRY, &data->stats.rx_packets);
503
504         data->tmpstats.tx_packets =
505             tsi108_read_stat(data, TSI108_STAT_TXPKTS,
506                              TSI108_STAT_CARRY2_TXPKTS,
507                              TSI108_STAT_TXPKTS_CARRY, &data->stats.tx_packets);
508
509         data->tmpstats.rx_bytes =
510             tsi108_read_stat(data, TSI108_STAT_RXBYTES,
511                              TSI108_STAT_CARRY1_RXBYTES,
512                              TSI108_STAT_RXBYTES_CARRY, &data->stats.rx_bytes);
513
514         data->tmpstats.tx_bytes =
515             tsi108_read_stat(data, TSI108_STAT_TXBYTES,
516                              TSI108_STAT_CARRY2_TXBYTES,
517                              TSI108_STAT_TXBYTES_CARRY, &data->stats.tx_bytes);
518
519         data->tmpstats.multicast =
520             tsi108_read_stat(data, TSI108_STAT_RXMCAST,
521                              TSI108_STAT_CARRY1_RXMCAST,
522                              TSI108_STAT_RXMCAST_CARRY, &data->stats.multicast);
523
524         excol = tsi108_read_stat(data, TSI108_STAT_TXEXCOL,
525                                  TSI108_STAT_CARRY2_TXEXCOL,
526                                  TSI108_STAT_TXEXCOL_CARRY,
527                                  &data->tx_coll_abort);
528
529         data->tmpstats.collisions =
530             tsi108_read_stat(data, TSI108_STAT_TXTCOL,
531                              TSI108_STAT_CARRY2_TXTCOL,
532                              TSI108_STAT_TXTCOL_CARRY, &data->stats.collisions);
533
534         data->tmpstats.collisions += excol;
535
536         data->tmpstats.rx_length_errors =
537             tsi108_read_stat(data, TSI108_STAT_RXLENGTH,
538                              TSI108_STAT_CARRY1_RXLENGTH,
539                              TSI108_STAT_RXLENGTH_CARRY,
540                              &data->stats.rx_length_errors);
541
542         data->tmpstats.rx_length_errors +=
543             tsi108_read_stat(data, TSI108_STAT_RXRUNT,
544                              TSI108_STAT_CARRY1_RXRUNT,
545                              TSI108_STAT_RXRUNT_CARRY, &data->rx_underruns);
546
547         data->tmpstats.rx_length_errors +=
548             tsi108_read_stat(data, TSI108_STAT_RXJUMBO,
549                              TSI108_STAT_CARRY1_RXJUMBO,
550                              TSI108_STAT_RXJUMBO_CARRY, &data->rx_overruns);
551
552         data->tmpstats.rx_frame_errors =
553             tsi108_read_stat(data, TSI108_STAT_RXALIGN,
554                              TSI108_STAT_CARRY1_RXALIGN,
555                              TSI108_STAT_RXALIGN_CARRY,
556                              &data->stats.rx_frame_errors);
557
558         data->tmpstats.rx_frame_errors +=
559             tsi108_read_stat(data, TSI108_STAT_RXFCS,
560                              TSI108_STAT_CARRY1_RXFCS, TSI108_STAT_RXFCS_CARRY,
561                              &data->rx_fcs);
562
563         data->tmpstats.rx_frame_errors +=
564             tsi108_read_stat(data, TSI108_STAT_RXFRAG,
565                              TSI108_STAT_CARRY1_RXFRAG,
566                              TSI108_STAT_RXFRAG_CARRY, &data->rx_short_fcs);
567
568         data->tmpstats.rx_missed_errors =
569             tsi108_read_stat(data, TSI108_STAT_RXDROP,
570                              TSI108_STAT_CARRY1_RXDROP,
571                              TSI108_STAT_RXDROP_CARRY,
572                              &data->stats.rx_missed_errors);
573
574         /* These three are maintained by software. */
575         data->tmpstats.rx_fifo_errors = data->stats.rx_fifo_errors;
576         data->tmpstats.rx_crc_errors = data->stats.rx_crc_errors;
577
578         data->tmpstats.tx_aborted_errors =
579             tsi108_read_stat(data, TSI108_STAT_TXEXDEF,
580                              TSI108_STAT_CARRY2_TXEXDEF,
581                              TSI108_STAT_TXEXDEF_CARRY,
582                              &data->stats.tx_aborted_errors);
583
584         data->tmpstats.tx_aborted_errors +=
585             tsi108_read_stat(data, TSI108_STAT_TXPAUSEDROP,
586                              TSI108_STAT_CARRY2_TXPAUSE,
587                              TSI108_STAT_TXPAUSEDROP_CARRY,
588                              &data->tx_pause_drop);
589
590         data->tmpstats.tx_aborted_errors += excol;
591
592         data->tmpstats.tx_errors = data->tmpstats.tx_aborted_errors;
593         data->tmpstats.rx_errors = data->tmpstats.rx_length_errors +
594             data->tmpstats.rx_crc_errors +
595             data->tmpstats.rx_frame_errors +
596             data->tmpstats.rx_fifo_errors + data->tmpstats.rx_missed_errors;
597
598         spin_unlock_irq(&data->misclock);
599         return &data->tmpstats;
600 }
601
602 static void tsi108_restart_rx(struct tsi108_prv_data * data, struct net_device *dev)
603 {
604         TSI_WRITE(TSI108_EC_RXQ_PTRHIGH,
605                              TSI108_EC_RXQ_PTRHIGH_VALID);
606
607         TSI_WRITE(TSI108_EC_RXCTRL, TSI108_EC_RXCTRL_GO
608                              | TSI108_EC_RXCTRL_QUEUE0);
609 }
610
611 static void tsi108_restart_tx(struct tsi108_prv_data * data)
612 {
613         TSI_WRITE(TSI108_EC_TXQ_PTRHIGH,
614                              TSI108_EC_TXQ_PTRHIGH_VALID);
615
616         TSI_WRITE(TSI108_EC_TXCTRL, TSI108_EC_TXCTRL_IDLEINT |
617                              TSI108_EC_TXCTRL_GO | TSI108_EC_TXCTRL_QUEUE0);
618 }
619
620 /* txlock must be held by caller, with IRQs disabled, and
621  * with permission to re-enable them when the lock is dropped.
622  */
623 static void tsi108_complete_tx(struct net_device *dev)
624 {
625         struct tsi108_prv_data *data = netdev_priv(dev);
626         int tx;
627         struct sk_buff *skb;
628         int release = 0;
629
630         while (!data->txfree || data->txhead != data->txtail) {
631                 tx = data->txtail;
632
633                 if (data->txring[tx].misc & TSI108_TX_OWN)
634                         break;
635
636                 skb = data->txskbs[tx];
637
638                 if (!(data->txring[tx].misc & TSI108_TX_OK))
639                         printk("%s: bad tx packet, misc %x\n",
640                                dev->name, data->txring[tx].misc);
641
642                 data->txtail = (data->txtail + 1) % TSI108_TXRING_LEN;
643                 data->txfree++;
644
645                 if (data->txring[tx].misc & TSI108_TX_EOF) {
646                         dev_kfree_skb_any(skb);
647                         release++;
648                 }
649         }
650
651         if (release) {
652                 if (is_valid_ether_addr(dev->dev_addr) && data->link_up)
653                         netif_wake_queue(dev);
654         }
655 }
656
657 static int tsi108_send_packet(struct sk_buff * skb, struct net_device *dev)
658 {
659         struct tsi108_prv_data *data = netdev_priv(dev);
660         int frags = skb_shinfo(skb)->nr_frags + 1;
661         int i;
662
663         if (!data->phy_ok && net_ratelimit())
664                 printk(KERN_ERR "%s: Transmit while PHY is down!\n", dev->name);
665
666         if (!data->link_up) {
667                 printk(KERN_ERR "%s: Transmit while link is down!\n",
668                        dev->name);
669                 netif_stop_queue(dev);
670                 return NETDEV_TX_BUSY;
671         }
672
673         if (data->txfree < MAX_SKB_FRAGS + 1) {
674                 netif_stop_queue(dev);
675
676                 if (net_ratelimit())
677                         printk(KERN_ERR "%s: Transmit with full tx ring!\n",
678                                dev->name);
679                 return NETDEV_TX_BUSY;
680         }
681
682         if (data->txfree - frags < MAX_SKB_FRAGS + 1) {
683                 netif_stop_queue(dev);
684         }
685
686         spin_lock_irq(&data->txlock);
687
688         for (i = 0; i < frags; i++) {
689                 int misc = 0;
690                 int tx = data->txhead;
691
692                 /* This is done to mark every TSI108_TX_INT_FREQ tx buffers with
693                  * the interrupt bit.  TX descriptor-complete interrupts are
694                  * enabled when the queue fills up, and masked when there is
695                  * still free space.  This way, when saturating the outbound
696                  * link, the tx interrupts are kept to a reasonable level.
697                  * When the queue is not full, reclamation of skbs still occurs
698                  * as new packets are transmitted, or on a queue-empty
699                  * interrupt.
700                  */
701
702                 if ((tx % TSI108_TX_INT_FREQ == 0) &&
703                     ((TSI108_TXRING_LEN - data->txfree) >= TSI108_TX_INT_FREQ))
704                         misc = TSI108_TX_INT;
705
706                 data->txskbs[tx] = skb;
707
708                 if (i == 0) {
709                         data->txring[tx].buf0 = dma_map_single(NULL, skb->data,
710                                         skb->len - skb->data_len, DMA_TO_DEVICE);
711                         data->txring[tx].len = skb->len - skb->data_len;
712                         misc |= TSI108_TX_SOF;
713                 } else {
714                         skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
715
716                         data->txring[tx].buf0 =
717                             dma_map_page(NULL, frag->page, frag->page_offset,
718                                             frag->size, DMA_TO_DEVICE);
719                         data->txring[tx].len = frag->size;
720                 }
721
722                 if (i == frags - 1)
723                         misc |= TSI108_TX_EOF;
724
725                 if (netif_msg_pktdata(data)) {
726                         int i;
727                         printk("%s: Tx Frame contents (%d)\n", dev->name,
728                                skb->len);
729                         for (i = 0; i < skb->len; i++)
730                                 printk(" %2.2x", skb->data[i]);
731                         printk(".\n");
732                 }
733                 data->txring[tx].misc = misc | TSI108_TX_OWN;
734
735                 data->txhead = (data->txhead + 1) % TSI108_TXRING_LEN;
736                 data->txfree--;
737         }
738
739         tsi108_complete_tx(dev);
740
741         /* This must be done after the check for completed tx descriptors,
742          * so that the tail pointer is correct.
743          */
744
745         if (!(TSI_READ(TSI108_EC_TXSTAT) & TSI108_EC_TXSTAT_QUEUE0))
746                 tsi108_restart_tx(data);
747
748         spin_unlock_irq(&data->txlock);
749         return NETDEV_TX_OK;
750 }
751
752 static int tsi108_complete_rx(struct net_device *dev, int budget)
753 {
754         struct tsi108_prv_data *data = netdev_priv(dev);
755         int done = 0;
756
757         while (data->rxfree && done != budget) {
758                 int rx = data->rxtail;
759                 struct sk_buff *skb;
760
761                 if (data->rxring[rx].misc & TSI108_RX_OWN)
762                         break;
763
764                 skb = data->rxskbs[rx];
765                 data->rxtail = (data->rxtail + 1) % TSI108_RXRING_LEN;
766                 data->rxfree--;
767                 done++;
768
769                 if (data->rxring[rx].misc & TSI108_RX_BAD) {
770                         spin_lock_irq(&data->misclock);
771
772                         if (data->rxring[rx].misc & TSI108_RX_CRC)
773                                 data->stats.rx_crc_errors++;
774                         if (data->rxring[rx].misc & TSI108_RX_OVER)
775                                 data->stats.rx_fifo_errors++;
776
777                         spin_unlock_irq(&data->misclock);
778
779                         dev_kfree_skb_any(skb);
780                         continue;
781                 }
782                 if (netif_msg_pktdata(data)) {
783                         int i;
784                         printk("%s: Rx Frame contents (%d)\n",
785                                dev->name, data->rxring[rx].len);
786                         for (i = 0; i < data->rxring[rx].len; i++)
787                                 printk(" %2.2x", skb->data[i]);
788                         printk(".\n");
789                 }
790
791                 skb->dev = dev;
792                 skb_put(skb, data->rxring[rx].len);
793                 skb->protocol = eth_type_trans(skb, dev);
794                 netif_receive_skb(skb);
795                 dev->last_rx = jiffies;
796         }
797
798         return done;
799 }
800
801 static int tsi108_refill_rx(struct net_device *dev, int budget)
802 {
803         struct tsi108_prv_data *data = netdev_priv(dev);
804         int done = 0;
805
806         while (data->rxfree != TSI108_RXRING_LEN && done != budget) {
807                 int rx = data->rxhead;
808                 struct sk_buff *skb;
809
810                 data->rxskbs[rx] = skb = dev_alloc_skb(TSI108_RXBUF_SIZE + 2);
811                 if (!skb)
812                         break;
813
814                 skb_reserve(skb, 2); /* Align the data on a 4-byte boundary. */
815
816                 data->rxring[rx].buf0 = dma_map_single(NULL, skb->data,
817                                                         TSI108_RX_SKB_SIZE,
818                                                         DMA_FROM_DEVICE);
819
820                 /* Sometimes the hardware sets blen to zero after packet
821                  * reception, even though the manual says that it's only ever
822                  * modified by the driver.
823                  */
824
825                 data->rxring[rx].blen = TSI108_RX_SKB_SIZE;
826                 data->rxring[rx].misc = TSI108_RX_OWN | TSI108_RX_INT;
827
828                 data->rxhead = (data->rxhead + 1) % TSI108_RXRING_LEN;
829                 data->rxfree++;
830                 done++;
831         }
832
833         if (done != 0 && !(TSI_READ(TSI108_EC_RXSTAT) &
834                            TSI108_EC_RXSTAT_QUEUE0))
835                 tsi108_restart_rx(data, dev);
836
837         return done;
838 }
839
840 static int tsi108_poll(struct net_device *dev, int *budget)
841 {
842         struct tsi108_prv_data *data = netdev_priv(dev);
843         u32 estat = TSI_READ(TSI108_EC_RXESTAT);
844         u32 intstat = TSI_READ(TSI108_EC_INTSTAT);
845         int total_budget = min(*budget, dev->quota);
846         int num_received = 0, num_filled = 0, budget_used;
847
848         intstat &= TSI108_INT_RXQUEUE0 | TSI108_INT_RXTHRESH |
849             TSI108_INT_RXOVERRUN | TSI108_INT_RXERROR | TSI108_INT_RXWAIT;
850
851         TSI_WRITE(TSI108_EC_RXESTAT, estat);
852         TSI_WRITE(TSI108_EC_INTSTAT, intstat);
853
854         if (data->rxpending || (estat & TSI108_EC_RXESTAT_Q0_DESCINT))
855                 num_received = tsi108_complete_rx(dev, total_budget);
856
857         /* This should normally fill no more slots than the number of
858          * packets received in tsi108_complete_rx().  The exception
859          * is when we previously ran out of memory for RX SKBs.  In that
860          * case, it's helpful to obey the budget, not only so that the
861          * CPU isn't hogged, but so that memory (which may still be low)
862          * is not hogged by one device.
863          *
864          * A work unit is considered to be two SKBs to allow us to catch
865          * up when the ring has shrunk due to out-of-memory but we're
866          * still removing the full budget's worth of packets each time.
867          */
868
869         if (data->rxfree < TSI108_RXRING_LEN)
870                 num_filled = tsi108_refill_rx(dev, total_budget * 2);
871
872         if (intstat & TSI108_INT_RXERROR) {
873                 u32 err = TSI_READ(TSI108_EC_RXERR);
874                 TSI_WRITE(TSI108_EC_RXERR, err);
875
876                 if (err) {
877                         if (net_ratelimit())
878                                 printk(KERN_DEBUG "%s: RX error %x\n",
879                                        dev->name, err);
880
881                         if (!(TSI_READ(TSI108_EC_RXSTAT) &
882                               TSI108_EC_RXSTAT_QUEUE0))
883                                 tsi108_restart_rx(data, dev);
884                 }
885         }
886
887         if (intstat & TSI108_INT_RXOVERRUN) {
888                 spin_lock_irq(&data->misclock);
889                 data->stats.rx_fifo_errors++;
890                 spin_unlock_irq(&data->misclock);
891         }
892
893         budget_used = max(num_received, num_filled / 2);
894
895         *budget -= budget_used;
896         dev->quota -= budget_used;
897
898         if (budget_used != total_budget) {
899                 data->rxpending = 0;
900                 netif_rx_complete(dev);
901
902                 TSI_WRITE(TSI108_EC_INTMASK,
903                                      TSI_READ(TSI108_EC_INTMASK)
904                                      & ~(TSI108_INT_RXQUEUE0
905                                          | TSI108_INT_RXTHRESH |
906                                          TSI108_INT_RXOVERRUN |
907                                          TSI108_INT_RXERROR |
908                                          TSI108_INT_RXWAIT));
909
910                 /* IRQs are level-triggered, so no need to re-check */
911                 return 0;
912         } else {
913                 data->rxpending = 1;
914         }
915
916         return 1;
917 }
918
919 static void tsi108_rx_int(struct net_device *dev)
920 {
921         struct tsi108_prv_data *data = netdev_priv(dev);
922
923         /* A race could cause dev to already be scheduled, so it's not an
924          * error if that happens (and interrupts shouldn't be re-masked,
925          * because that can cause harmful races, if poll has already
926          * unmasked them but not cleared LINK_STATE_SCHED).
927          *
928          * This can happen if this code races with tsi108_poll(), which masks
929          * the interrupts after tsi108_irq_one() read the mask, but before
930          * netif_rx_schedule is called.  It could also happen due to calls
931          * from tsi108_check_rxring().
932          */
933
934         if (netif_rx_schedule_prep(dev)) {
935                 /* Mask, rather than ack, the receive interrupts.  The ack
936                  * will happen in tsi108_poll().
937                  */
938
939                 TSI_WRITE(TSI108_EC_INTMASK,
940                                      TSI_READ(TSI108_EC_INTMASK) |
941                                      TSI108_INT_RXQUEUE0
942                                      | TSI108_INT_RXTHRESH |
943                                      TSI108_INT_RXOVERRUN | TSI108_INT_RXERROR |
944                                      TSI108_INT_RXWAIT);
945                 __netif_rx_schedule(dev);
946         } else {
947                 if (!netif_running(dev)) {
948                         /* This can happen if an interrupt occurs while the
949                          * interface is being brought down, as the START
950                          * bit is cleared before the stop function is called.
951                          *
952                          * In this case, the interrupts must be masked, or
953                          * they will continue indefinitely.
954                          *
955                          * There's a race here if the interface is brought down
956                          * and then up in rapid succession, as the device could
957                          * be made running after the above check and before
958                          * the masking below.  This will only happen if the IRQ
959                          * thread has a lower priority than the task brining
960                          * up the interface.  Fixing this race would likely
961                          * require changes in generic code.
962                          */
963
964                         TSI_WRITE(TSI108_EC_INTMASK,
965                                              TSI_READ
966                                              (TSI108_EC_INTMASK) |
967                                              TSI108_INT_RXQUEUE0 |
968                                              TSI108_INT_RXTHRESH |
969                                              TSI108_INT_RXOVERRUN |
970                                              TSI108_INT_RXERROR |
971                                              TSI108_INT_RXWAIT);
972                 }
973         }
974 }
975
976 /* If the RX ring has run out of memory, try periodically
977  * to allocate some more, as otherwise poll would never
978  * get called (apart from the initial end-of-queue condition).
979  *
980  * This is called once per second (by default) from the thread.
981  */
982
983 static void tsi108_check_rxring(struct net_device *dev)
984 {
985         struct tsi108_prv_data *data = netdev_priv(dev);
986
987         /* A poll is scheduled, as opposed to caling tsi108_refill_rx
988          * directly, so as to keep the receive path single-threaded
989          * (and thus not needing a lock).
990          */
991
992         if (netif_running(dev) && data->rxfree < TSI108_RXRING_LEN / 4)
993                 tsi108_rx_int(dev);
994 }
995
996 static void tsi108_tx_int(struct net_device *dev)
997 {
998         struct tsi108_prv_data *data = netdev_priv(dev);
999         u32 estat = TSI_READ(TSI108_EC_TXESTAT);
1000
1001         TSI_WRITE(TSI108_EC_TXESTAT, estat);
1002         TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_TXQUEUE0 |
1003                              TSI108_INT_TXIDLE | TSI108_INT_TXERROR);
1004         if (estat & TSI108_EC_TXESTAT_Q0_ERR) {
1005                 u32 err = TSI_READ(TSI108_EC_TXERR);
1006                 TSI_WRITE(TSI108_EC_TXERR, err);
1007
1008                 if (err && net_ratelimit())
1009                         printk(KERN_ERR "%s: TX error %x\n", dev->name, err);
1010         }
1011
1012         if (estat & (TSI108_EC_TXESTAT_Q0_DESCINT | TSI108_EC_TXESTAT_Q0_EOQ)) {
1013                 spin_lock(&data->txlock);
1014                 tsi108_complete_tx(dev);
1015                 spin_unlock(&data->txlock);
1016         }
1017 }
1018
1019
1020 static irqreturn_t tsi108_irq(int irq, void *dev_id)
1021 {
1022         struct net_device *dev = dev_id;
1023         struct tsi108_prv_data *data = netdev_priv(dev);
1024         u32 stat = TSI_READ(TSI108_EC_INTSTAT);
1025
1026         if (!(stat & TSI108_INT_ANY))
1027                 return IRQ_NONE;        /* Not our interrupt */
1028
1029         stat &= ~TSI_READ(TSI108_EC_INTMASK);
1030
1031         if (stat & (TSI108_INT_TXQUEUE0 | TSI108_INT_TXIDLE |
1032                     TSI108_INT_TXERROR))
1033                 tsi108_tx_int(dev);
1034         if (stat & (TSI108_INT_RXQUEUE0 | TSI108_INT_RXTHRESH |
1035                     TSI108_INT_RXWAIT | TSI108_INT_RXOVERRUN |
1036                     TSI108_INT_RXERROR))
1037                 tsi108_rx_int(dev);
1038
1039         if (stat & TSI108_INT_SFN) {
1040                 if (net_ratelimit())
1041                         printk(KERN_DEBUG "%s: SFN error\n", dev->name);
1042                 TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_SFN);
1043         }
1044
1045         if (stat & TSI108_INT_STATCARRY) {
1046                 tsi108_stat_carry(dev);
1047                 TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_STATCARRY);
1048         }
1049
1050         return IRQ_HANDLED;
1051 }
1052
1053 static void tsi108_stop_ethernet(struct net_device *dev)
1054 {
1055         struct tsi108_prv_data *data = netdev_priv(dev);
1056         int i = 1000;
1057         /* Disable all TX and RX queues ... */
1058         TSI_WRITE(TSI108_EC_TXCTRL, 0);
1059         TSI_WRITE(TSI108_EC_RXCTRL, 0);
1060
1061         /* ...and wait for them to become idle */
1062         while(i--) {
1063                 if(!(TSI_READ(TSI108_EC_TXSTAT) & TSI108_EC_TXSTAT_ACTIVE))
1064                         break;
1065                 udelay(10);
1066         }
1067         i = 1000;
1068         while(i--){
1069                 if(!(TSI_READ(TSI108_EC_RXSTAT) & TSI108_EC_RXSTAT_ACTIVE))
1070                         return;
1071                 udelay(10);
1072         }
1073         printk(KERN_ERR "%s function time out \n", __FUNCTION__);
1074 }
1075
1076 static void tsi108_reset_ether(struct tsi108_prv_data * data)
1077 {
1078         TSI_WRITE(TSI108_MAC_CFG1, TSI108_MAC_CFG1_SOFTRST);
1079         udelay(100);
1080         TSI_WRITE(TSI108_MAC_CFG1, 0);
1081
1082         TSI_WRITE(TSI108_EC_PORTCTRL, TSI108_EC_PORTCTRL_STATRST);
1083         udelay(100);
1084         TSI_WRITE(TSI108_EC_PORTCTRL,
1085                              TSI_READ(TSI108_EC_PORTCTRL) &
1086                              ~TSI108_EC_PORTCTRL_STATRST);
1087
1088         TSI_WRITE(TSI108_EC_TXCFG, TSI108_EC_TXCFG_RST);
1089         udelay(100);
1090         TSI_WRITE(TSI108_EC_TXCFG,
1091                              TSI_READ(TSI108_EC_TXCFG) &
1092                              ~TSI108_EC_TXCFG_RST);
1093
1094         TSI_WRITE(TSI108_EC_RXCFG, TSI108_EC_RXCFG_RST);
1095         udelay(100);
1096         TSI_WRITE(TSI108_EC_RXCFG,
1097                              TSI_READ(TSI108_EC_RXCFG) &
1098                              ~TSI108_EC_RXCFG_RST);
1099
1100         TSI_WRITE(TSI108_MAC_MII_MGMT_CFG,
1101                              TSI_READ(TSI108_MAC_MII_MGMT_CFG) |
1102                              TSI108_MAC_MII_MGMT_RST);
1103         udelay(100);
1104         TSI_WRITE(TSI108_MAC_MII_MGMT_CFG,
1105                              (TSI_READ(TSI108_MAC_MII_MGMT_CFG) &
1106                              ~(TSI108_MAC_MII_MGMT_RST |
1107                                TSI108_MAC_MII_MGMT_CLK)) | 0x07);
1108 }
1109
1110 static int tsi108_get_mac(struct net_device *dev)
1111 {
1112         struct tsi108_prv_data *data = netdev_priv(dev);
1113         u32 word1 = TSI_READ(TSI108_MAC_ADDR1);
1114         u32 word2 = TSI_READ(TSI108_MAC_ADDR2);
1115
1116         /* Note that the octets are reversed from what the manual says,
1117          * producing an even weirder ordering...
1118          */
1119         if (word2 == 0 && word1 == 0) {
1120                 dev->dev_addr[0] = 0x00;
1121                 dev->dev_addr[1] = 0x06;
1122                 dev->dev_addr[2] = 0xd2;
1123                 dev->dev_addr[3] = 0x00;
1124                 dev->dev_addr[4] = 0x00;
1125                 if (0x8 == data->phy)
1126                         dev->dev_addr[5] = 0x01;
1127                 else
1128                         dev->dev_addr[5] = 0x02;
1129
1130                 word2 = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 24);
1131
1132                 word1 = (dev->dev_addr[2] << 0) | (dev->dev_addr[3] << 8) |
1133                     (dev->dev_addr[4] << 16) | (dev->dev_addr[5] << 24);
1134
1135                 TSI_WRITE(TSI108_MAC_ADDR1, word1);
1136                 TSI_WRITE(TSI108_MAC_ADDR2, word2);
1137         } else {
1138                 dev->dev_addr[0] = (word2 >> 16) & 0xff;
1139                 dev->dev_addr[1] = (word2 >> 24) & 0xff;
1140                 dev->dev_addr[2] = (word1 >> 0) & 0xff;
1141                 dev->dev_addr[3] = (word1 >> 8) & 0xff;
1142                 dev->dev_addr[4] = (word1 >> 16) & 0xff;
1143                 dev->dev_addr[5] = (word1 >> 24) & 0xff;
1144         }
1145
1146         if (!is_valid_ether_addr(dev->dev_addr)) {
1147                 printk("KERN_ERR: word1: %08x, word2: %08x\n", word1, word2);
1148                 return -EINVAL;
1149         }
1150
1151         return 0;
1152 }
1153
1154 static int tsi108_set_mac(struct net_device *dev, void *addr)
1155 {
1156         struct tsi108_prv_data *data = netdev_priv(dev);
1157         u32 word1, word2;
1158         int i;
1159
1160         if (!is_valid_ether_addr(addr))
1161                 return -EINVAL;
1162
1163         for (i = 0; i < 6; i++)
1164                 /* +2 is for the offset of the HW addr type */
1165                 dev->dev_addr[i] = ((unsigned char *)addr)[i + 2];
1166
1167         word2 = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 24);
1168
1169         word1 = (dev->dev_addr[2] << 0) | (dev->dev_addr[3] << 8) |
1170             (dev->dev_addr[4] << 16) | (dev->dev_addr[5] << 24);
1171
1172         spin_lock_irq(&data->misclock);
1173         TSI_WRITE(TSI108_MAC_ADDR1, word1);
1174         TSI_WRITE(TSI108_MAC_ADDR2, word2);
1175         spin_lock(&data->txlock);
1176
1177         if (data->txfree && data->link_up)
1178                 netif_wake_queue(dev);
1179
1180         spin_unlock(&data->txlock);
1181         spin_unlock_irq(&data->misclock);
1182         return 0;
1183 }
1184
1185 /* Protected by dev->xmit_lock. */
1186 static void tsi108_set_rx_mode(struct net_device *dev)
1187 {
1188         struct tsi108_prv_data *data = netdev_priv(dev);
1189         u32 rxcfg = TSI_READ(TSI108_EC_RXCFG);
1190
1191         if (dev->flags & IFF_PROMISC) {
1192                 rxcfg &= ~(TSI108_EC_RXCFG_UC_HASH | TSI108_EC_RXCFG_MC_HASH);
1193                 rxcfg |= TSI108_EC_RXCFG_UFE | TSI108_EC_RXCFG_MFE;
1194                 goto out;
1195         }
1196
1197         rxcfg &= ~(TSI108_EC_RXCFG_UFE | TSI108_EC_RXCFG_MFE);
1198
1199         if (dev->flags & IFF_ALLMULTI || dev->mc_count) {
1200                 int i;
1201                 struct dev_mc_list *mc = dev->mc_list;
1202                 rxcfg |= TSI108_EC_RXCFG_MFE | TSI108_EC_RXCFG_MC_HASH;
1203
1204                 memset(data->mc_hash, 0, sizeof(data->mc_hash));
1205
1206                 while (mc) {
1207                         u32 hash, crc;
1208
1209                         if (mc->dmi_addrlen == 6) {
1210                                 crc = ether_crc(6, mc->dmi_addr);
1211                                 hash = crc >> 23;
1212
1213                                 __set_bit(hash, &data->mc_hash[0]);
1214                         } else {
1215                                 printk(KERN_ERR
1216                                        "%s: got multicast address of length %d "
1217                                        "instead of 6.\n", dev->name,
1218                                        mc->dmi_addrlen);
1219                         }
1220
1221                         mc = mc->next;
1222                 }
1223
1224                 TSI_WRITE(TSI108_EC_HASHADDR,
1225                                      TSI108_EC_HASHADDR_AUTOINC |
1226                                      TSI108_EC_HASHADDR_MCAST);
1227
1228                 for (i = 0; i < 16; i++) {
1229                         /* The manual says that the hardware may drop
1230                          * back-to-back writes to the data register.
1231                          */
1232                         udelay(1);
1233                         TSI_WRITE(TSI108_EC_HASHDATA,
1234                                              data->mc_hash[i]);
1235                 }
1236         }
1237
1238       out:
1239         TSI_WRITE(TSI108_EC_RXCFG, rxcfg);
1240 }
1241
1242 static void tsi108_init_phy(struct net_device *dev)
1243 {
1244         struct tsi108_prv_data *data = netdev_priv(dev);
1245         u32 i = 0;
1246         u16 phyval = 0;
1247         unsigned long flags;
1248
1249         spin_lock_irqsave(&phy_lock, flags);
1250
1251         tsi108_write_mii(data, MII_BMCR, BMCR_RESET);
1252         while (i--){
1253                 if(!(tsi108_read_mii(data, MII_BMCR) & BMCR_RESET))
1254                         break;
1255                 udelay(10);
1256         }
1257         if (i == 0)
1258                 printk(KERN_ERR "%s function time out \n", __FUNCTION__);
1259
1260 #if (TSI108_PHY_TYPE == PHY_BCM54XX)    /* Broadcom BCM54xx PHY */
1261         tsi108_write_mii(data, 0x09, 0x0300);
1262         tsi108_write_mii(data, 0x10, 0x1020);
1263         tsi108_write_mii(data, 0x1c, 0x8c00);
1264 #endif
1265
1266         tsi108_write_mii(data,
1267                          MII_BMCR,
1268                          BMCR_ANENABLE | BMCR_ANRESTART);
1269         while (tsi108_read_mii(data, MII_BMCR) & BMCR_ANRESTART)
1270                 cpu_relax();
1271
1272         /* Set G/MII mode and receive clock select in TBI control #2.  The
1273          * second port won't work if this isn't done, even though we don't
1274          * use TBI mode.
1275          */
1276
1277         tsi108_write_tbi(data, 0x11, 0x30);
1278
1279         /* FIXME: It seems to take more than 2 back-to-back reads to the
1280          * PHY_STAT register before the link up status bit is set.
1281          */
1282
1283         data->link_up = 1;
1284
1285         while (!((phyval = tsi108_read_mii(data, MII_BMSR)) &
1286                  BMSR_LSTATUS)) {
1287                 if (i++ > (MII_READ_DELAY / 10)) {
1288                         data->link_up = 0;
1289                         break;
1290                 }
1291                 spin_unlock_irqrestore(&phy_lock, flags);
1292                 msleep(10);
1293                 spin_lock_irqsave(&phy_lock, flags);
1294         }
1295
1296         printk(KERN_DEBUG "PHY_STAT reg contains %08x\n", phyval);
1297         data->phy_ok = 1;
1298         data->init_media = 1;
1299         spin_unlock_irqrestore(&phy_lock, flags);
1300 }
1301
1302 static void tsi108_kill_phy(struct net_device *dev)
1303 {
1304         struct tsi108_prv_data *data = netdev_priv(dev);
1305         unsigned long flags;
1306
1307         spin_lock_irqsave(&phy_lock, flags);
1308         tsi108_write_mii(data, MII_BMCR, BMCR_PDOWN);
1309         data->phy_ok = 0;
1310         spin_unlock_irqrestore(&phy_lock, flags);
1311 }
1312
1313 static int tsi108_open(struct net_device *dev)
1314 {
1315         int i;
1316         struct tsi108_prv_data *data = netdev_priv(dev);
1317         unsigned int rxring_size = TSI108_RXRING_LEN * sizeof(rx_desc);
1318         unsigned int txring_size = TSI108_TXRING_LEN * sizeof(tx_desc);
1319
1320         i = request_irq(data->irq_num, tsi108_irq, 0, dev->name, dev);
1321         if (i != 0) {
1322                 printk(KERN_ERR "tsi108_eth%d: Could not allocate IRQ%d.\n",
1323                        data->id, data->irq_num);
1324                 return i;
1325         } else {
1326                 dev->irq = data->irq_num;
1327                 printk(KERN_NOTICE
1328                        "tsi108_open : Port %d Assigned IRQ %d to %s\n",
1329                        data->id, dev->irq, dev->name);
1330         }
1331
1332         data->rxring = dma_alloc_coherent(NULL, rxring_size,
1333                         &data->rxdma, GFP_KERNEL);
1334
1335         if (!data->rxring) {
1336                 printk(KERN_DEBUG
1337                        "TSI108_ETH: failed to allocate memory for rxring!\n");
1338                 return -ENOMEM;
1339         } else {
1340                 memset(data->rxring, 0, rxring_size);
1341         }
1342
1343         data->txring = dma_alloc_coherent(NULL, txring_size,
1344                         &data->txdma, GFP_KERNEL);
1345
1346         if (!data->txring) {
1347                 printk(KERN_DEBUG
1348                        "TSI108_ETH: failed to allocate memory for txring!\n");
1349                 pci_free_consistent(0, rxring_size, data->rxring, data->rxdma);
1350                 return -ENOMEM;
1351         } else {
1352                 memset(data->txring, 0, txring_size);
1353         }
1354
1355         for (i = 0; i < TSI108_RXRING_LEN; i++) {
1356                 data->rxring[i].next0 = data->rxdma + (i + 1) * sizeof(rx_desc);
1357                 data->rxring[i].blen = TSI108_RXBUF_SIZE;
1358                 data->rxring[i].vlan = 0;
1359         }
1360
1361         data->rxring[TSI108_RXRING_LEN - 1].next0 = data->rxdma;
1362
1363         data->rxtail = 0;
1364         data->rxhead = 0;
1365
1366         for (i = 0; i < TSI108_RXRING_LEN; i++) {
1367                 struct sk_buff *skb = dev_alloc_skb(TSI108_RXBUF_SIZE + NET_IP_ALIGN);
1368
1369                 if (!skb) {
1370                         /* Bah.  No memory for now, but maybe we'll get
1371                          * some more later.
1372                          * For now, we'll live with the smaller ring.
1373                          */
1374                         printk(KERN_WARNING
1375                                "%s: Could only allocate %d receive skb(s).\n",
1376                                dev->name, i);
1377                         data->rxhead = i;
1378                         break;
1379                 }
1380
1381                 data->rxskbs[i] = skb;
1382                 /* Align the payload on a 4-byte boundary */
1383                 skb_reserve(skb, 2);
1384                 data->rxskbs[i] = skb;
1385                 data->rxring[i].buf0 = virt_to_phys(data->rxskbs[i]->data);
1386                 data->rxring[i].misc = TSI108_RX_OWN | TSI108_RX_INT;
1387         }
1388
1389         data->rxfree = i;
1390         TSI_WRITE(TSI108_EC_RXQ_PTRLOW, data->rxdma);
1391
1392         for (i = 0; i < TSI108_TXRING_LEN; i++) {
1393                 data->txring[i].next0 = data->txdma + (i + 1) * sizeof(tx_desc);
1394                 data->txring[i].misc = 0;
1395         }
1396
1397         data->txring[TSI108_TXRING_LEN - 1].next0 = data->txdma;
1398         data->txtail = 0;
1399         data->txhead = 0;
1400         data->txfree = TSI108_TXRING_LEN;
1401         TSI_WRITE(TSI108_EC_TXQ_PTRLOW, data->txdma);
1402         tsi108_init_phy(dev);
1403
1404         setup_timer(&data->timer, tsi108_timed_checker, (unsigned long)dev);
1405         mod_timer(&data->timer, jiffies + 1);
1406
1407         tsi108_restart_rx(data, dev);
1408
1409         TSI_WRITE(TSI108_EC_INTSTAT, ~0);
1410
1411         TSI_WRITE(TSI108_EC_INTMASK,
1412                              ~(TSI108_INT_TXQUEUE0 | TSI108_INT_RXERROR |
1413                                TSI108_INT_RXTHRESH | TSI108_INT_RXQUEUE0 |
1414                                TSI108_INT_RXOVERRUN | TSI108_INT_RXWAIT |
1415                                TSI108_INT_SFN | TSI108_INT_STATCARRY));
1416
1417         TSI_WRITE(TSI108_MAC_CFG1,
1418                              TSI108_MAC_CFG1_RXEN | TSI108_MAC_CFG1_TXEN);
1419         netif_start_queue(dev);
1420         return 0;
1421 }
1422
1423 static int tsi108_close(struct net_device *dev)
1424 {
1425         struct tsi108_prv_data *data = netdev_priv(dev);
1426
1427         netif_stop_queue(dev);
1428
1429         del_timer_sync(&data->timer);
1430
1431         tsi108_stop_ethernet(dev);
1432         tsi108_kill_phy(dev);
1433         TSI_WRITE(TSI108_EC_INTMASK, ~0);
1434         TSI_WRITE(TSI108_MAC_CFG1, 0);
1435
1436         /* Check for any pending TX packets, and drop them. */
1437
1438         while (!data->txfree || data->txhead != data->txtail) {
1439                 int tx = data->txtail;
1440                 struct sk_buff *skb;
1441                 skb = data->txskbs[tx];
1442                 data->txtail = (data->txtail + 1) % TSI108_TXRING_LEN;
1443                 data->txfree++;
1444                 dev_kfree_skb(skb);
1445         }
1446
1447         synchronize_irq(data->irq_num);
1448         free_irq(data->irq_num, dev);
1449
1450         /* Discard the RX ring. */
1451
1452         while (data->rxfree) {
1453                 int rx = data->rxtail;
1454                 struct sk_buff *skb;
1455
1456                 skb = data->rxskbs[rx];
1457                 data->rxtail = (data->rxtail + 1) % TSI108_RXRING_LEN;
1458                 data->rxfree--;
1459                 dev_kfree_skb(skb);
1460         }
1461
1462         dma_free_coherent(0,
1463                             TSI108_RXRING_LEN * sizeof(rx_desc),
1464                             data->rxring, data->rxdma);
1465         dma_free_coherent(0,
1466                             TSI108_TXRING_LEN * sizeof(tx_desc),
1467                             data->txring, data->txdma);
1468
1469         return 0;
1470 }
1471
1472 static void tsi108_init_mac(struct net_device *dev)
1473 {
1474         struct tsi108_prv_data *data = netdev_priv(dev);
1475
1476         TSI_WRITE(TSI108_MAC_CFG2, TSI108_MAC_CFG2_DFLT_PREAMBLE |
1477                              TSI108_MAC_CFG2_PADCRC);
1478
1479         TSI_WRITE(TSI108_EC_TXTHRESH,
1480                              (192 << TSI108_EC_TXTHRESH_STARTFILL) |
1481                              (192 << TSI108_EC_TXTHRESH_STOPFILL));
1482
1483         TSI_WRITE(TSI108_STAT_CARRYMASK1,
1484                              ~(TSI108_STAT_CARRY1_RXBYTES |
1485                                TSI108_STAT_CARRY1_RXPKTS |
1486                                TSI108_STAT_CARRY1_RXFCS |
1487                                TSI108_STAT_CARRY1_RXMCAST |
1488                                TSI108_STAT_CARRY1_RXALIGN |
1489                                TSI108_STAT_CARRY1_RXLENGTH |
1490                                TSI108_STAT_CARRY1_RXRUNT |
1491                                TSI108_STAT_CARRY1_RXJUMBO |
1492                                TSI108_STAT_CARRY1_RXFRAG |
1493                                TSI108_STAT_CARRY1_RXJABBER |
1494                                TSI108_STAT_CARRY1_RXDROP));
1495
1496         TSI_WRITE(TSI108_STAT_CARRYMASK2,
1497                              ~(TSI108_STAT_CARRY2_TXBYTES |
1498                                TSI108_STAT_CARRY2_TXPKTS |
1499                                TSI108_STAT_CARRY2_TXEXDEF |
1500                                TSI108_STAT_CARRY2_TXEXCOL |
1501                                TSI108_STAT_CARRY2_TXTCOL |
1502                                TSI108_STAT_CARRY2_TXPAUSE));
1503
1504         TSI_WRITE(TSI108_EC_PORTCTRL, TSI108_EC_PORTCTRL_STATEN);
1505         TSI_WRITE(TSI108_MAC_CFG1, 0);
1506
1507         TSI_WRITE(TSI108_EC_RXCFG,
1508                              TSI108_EC_RXCFG_SE | TSI108_EC_RXCFG_BFE);
1509
1510         TSI_WRITE(TSI108_EC_TXQ_CFG, TSI108_EC_TXQ_CFG_DESC_INT |
1511                              TSI108_EC_TXQ_CFG_EOQ_OWN_INT |
1512                              TSI108_EC_TXQ_CFG_WSWP | (TSI108_PBM_PORT <<
1513                                                 TSI108_EC_TXQ_CFG_SFNPORT));
1514
1515         TSI_WRITE(TSI108_EC_RXQ_CFG, TSI108_EC_RXQ_CFG_DESC_INT |
1516                              TSI108_EC_RXQ_CFG_EOQ_OWN_INT |
1517                              TSI108_EC_RXQ_CFG_WSWP | (TSI108_PBM_PORT <<
1518                                                 TSI108_EC_RXQ_CFG_SFNPORT));
1519
1520         TSI_WRITE(TSI108_EC_TXQ_BUFCFG,
1521                              TSI108_EC_TXQ_BUFCFG_BURST256 |
1522                              TSI108_EC_TXQ_BUFCFG_BSWP | (TSI108_PBM_PORT <<
1523                                                 TSI108_EC_TXQ_BUFCFG_SFNPORT));
1524
1525         TSI_WRITE(TSI108_EC_RXQ_BUFCFG,
1526                              TSI108_EC_RXQ_BUFCFG_BURST256 |
1527                              TSI108_EC_RXQ_BUFCFG_BSWP | (TSI108_PBM_PORT <<
1528                                                 TSI108_EC_RXQ_BUFCFG_SFNPORT));
1529
1530         TSI_WRITE(TSI108_EC_INTMASK, ~0);
1531 }
1532
1533 static int tsi108_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1534 {
1535         struct tsi108_prv_data *data = netdev_priv(dev);
1536         return generic_mii_ioctl(&data->mii_if, if_mii(rq), cmd, NULL);
1537 }
1538
1539 static int
1540 tsi108_init_one(struct platform_device *pdev)
1541 {
1542         struct net_device *dev = NULL;
1543         struct tsi108_prv_data *data = NULL;
1544         hw_info *einfo;
1545         int err = 0;
1546
1547         einfo = pdev->dev.platform_data;
1548
1549         if (NULL == einfo) {
1550                 printk(KERN_ERR "tsi-eth %d: Missing additional data!\n",
1551                        pdev->id);
1552                 return -ENODEV;
1553         }
1554
1555         /* Create an ethernet device instance */
1556
1557         dev = alloc_etherdev(sizeof(struct tsi108_prv_data));
1558         if (!dev) {
1559                 printk("tsi108_eth: Could not allocate a device structure\n");
1560                 return -ENOMEM;
1561         }
1562
1563         printk("tsi108_eth%d: probe...\n", pdev->id);
1564         data = netdev_priv(dev);
1565
1566         pr_debug("tsi108_eth%d:regs:phyresgs:phy:irq_num=0x%x:0x%x:0x%x:0x%x\n",
1567                         pdev->id, einfo->regs, einfo->phyregs,
1568                         einfo->phy, einfo->irq_num);
1569
1570         data->regs = ioremap(einfo->regs, 0x400);
1571         if (NULL == data->regs) {
1572                 err = -ENOMEM;
1573                 goto regs_fail;
1574         }
1575
1576         data->phyregs = ioremap(einfo->phyregs, 0x400);
1577         if (NULL == data->phyregs) {
1578                 err = -ENOMEM;
1579                 goto regs_fail;
1580         }
1581 /* MII setup */
1582         data->mii_if.dev = dev;
1583         data->mii_if.mdio_read = tsi108_mdio_read;
1584         data->mii_if.mdio_write = tsi108_mdio_write;
1585         data->mii_if.phy_id = einfo->phy;
1586         data->mii_if.phy_id_mask = 0x1f;
1587         data->mii_if.reg_num_mask = 0x1f;
1588         data->mii_if.supports_gmii = mii_check_gmii_support(&data->mii_if);
1589
1590         data->phy = einfo->phy;
1591         data->irq_num = einfo->irq_num;
1592         data->id = pdev->id;
1593         dev->open = tsi108_open;
1594         dev->stop = tsi108_close;
1595         dev->hard_start_xmit = tsi108_send_packet;
1596         dev->set_mac_address = tsi108_set_mac;
1597         dev->set_multicast_list = tsi108_set_rx_mode;
1598         dev->get_stats = tsi108_get_stats;
1599         dev->poll = tsi108_poll;
1600         dev->do_ioctl = tsi108_do_ioctl;
1601         dev->weight = 64;  /* 64 is more suitable for GigE interface - klai */
1602
1603         /* Apparently, the Linux networking code won't use scatter-gather
1604          * if the hardware doesn't do checksums.  However, it's faster
1605          * to checksum in place and use SG, as (among other reasons)
1606          * the cache won't be dirtied (which then has to be flushed
1607          * before DMA).  The checksumming is done by the driver (via
1608          * a new function skb_csum_dev() in net/core/skbuff.c).
1609          */
1610
1611         dev->features = NETIF_F_HIGHDMA;
1612         SET_MODULE_OWNER(dev);
1613
1614         spin_lock_init(&data->txlock);
1615         spin_lock_init(&data->misclock);
1616
1617         tsi108_reset_ether(data);
1618         tsi108_kill_phy(dev);
1619
1620         if ((err = tsi108_get_mac(dev)) != 0) {
1621                 printk(KERN_ERR "%s: Invalid MAC address.  Please correct.\n",
1622                        dev->name);
1623                 goto register_fail;
1624         }
1625
1626         tsi108_init_mac(dev);
1627         err = register_netdev(dev);
1628         if (err) {
1629                 printk(KERN_ERR "%s: Cannot register net device, aborting.\n",
1630                                 dev->name);
1631                 goto register_fail;
1632         }
1633
1634         printk(KERN_INFO "%s: Tsi108 Gigabit Ethernet, MAC: "
1635                "%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name,
1636                dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
1637                dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
1638 #ifdef DEBUG
1639         data->msg_enable = DEBUG;
1640         dump_eth_one(dev);
1641 #endif
1642
1643         return 0;
1644
1645 register_fail:
1646         iounmap(data->regs);
1647         iounmap(data->phyregs);
1648
1649 regs_fail:
1650         free_netdev(dev);
1651         return err;
1652 }
1653
1654 /* There's no way to either get interrupts from the PHY when
1655  * something changes, or to have the Tsi108 automatically communicate
1656  * with the PHY to reconfigure itself.
1657  *
1658  * Thus, we have to do it using a timer.
1659  */
1660
1661 static void tsi108_timed_checker(unsigned long dev_ptr)
1662 {
1663         struct net_device *dev = (struct net_device *)dev_ptr;
1664         struct tsi108_prv_data *data = netdev_priv(dev);
1665
1666         tsi108_check_phy(dev);
1667         tsi108_check_rxring(dev);
1668         mod_timer(&data->timer, jiffies + CHECK_PHY_INTERVAL);
1669 }
1670
1671 static int tsi108_ether_init(void)
1672 {
1673         int ret;
1674         ret = platform_driver_register (&tsi_eth_driver);
1675         if (ret < 0){
1676                 printk("tsi108_ether_init: error initializing ethernet "
1677                        "device\n");
1678                 return ret;
1679         }
1680         return 0;
1681 }
1682
1683 static int tsi108_ether_remove(struct platform_device *pdev)
1684 {
1685         struct net_device *dev = platform_get_drvdata(pdev);
1686         struct tsi108_prv_data *priv = netdev_priv(dev);
1687
1688         unregister_netdev(dev);
1689         tsi108_stop_ethernet(dev);
1690         platform_set_drvdata(pdev, NULL);
1691         iounmap(priv->regs);
1692         iounmap(priv->phyregs);
1693         free_netdev(dev);
1694
1695         return 0;
1696 }
1697 static void tsi108_ether_exit(void)
1698 {
1699         platform_driver_unregister(&tsi_eth_driver);
1700 }
1701
1702 module_init(tsi108_ether_init);
1703 module_exit(tsi108_ether_exit);
1704
1705 MODULE_AUTHOR("Tundra Semiconductor Corporation");
1706 MODULE_DESCRIPTION("Tsi108 Gigabit Ethernet driver");
1707 MODULE_LICENSE("GPL");