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[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / tsi108_eth.c
blob5c633a32eaeba1890b688a05f1ffab740560417f
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");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree