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FEC: Turn FEC driver into platform device driver
[linux-2.6/mini2440.git] / drivers / net / b44.c
blob92aaaa1ee9f1cbd01a45f820b1a685e8569d582c
1 /* b44.c: Broadcom 44xx/47xx Fast Ethernet device driver.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 * Copyright (C) 2004 Pekka Pietikainen (pp@ee.oulu.fi)
5 * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
6 * Copyright (C) 2006 Felix Fietkau (nbd@openwrt.org)
7 * Copyright (C) 2006 Broadcom Corporation.
8 * Copyright (C) 2007 Michael Buesch <mb@bu3sch.de>
9 *
10 * Distribute under GPL.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/types.h>
17 #include <linux/netdevice.h>
18 #include <linux/ethtool.h>
19 #include <linux/mii.h>
20 #include <linux/if_ether.h>
21 #include <linux/if_vlan.h>
22 #include <linux/etherdevice.h>
23 #include <linux/pci.h>
24 #include <linux/delay.h>
25 #include <linux/init.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/ssb/ssb.h>
28
29 #include <asm/uaccess.h>
30 #include <asm/io.h>
31 #include <asm/irq.h>
32
33
34 #include "b44.h"
35
36 #define DRV_MODULE_NAME "b44"
37 #define PFX DRV_MODULE_NAME ": "
38 #define DRV_MODULE_VERSION "2.0"
39
40 #define B44_DEF_MSG_ENABLE \
41 (NETIF_MSG_DRV | \
42 NETIF_MSG_PROBE | \
43 NETIF_MSG_LINK | \
44 NETIF_MSG_TIMER | \
45 NETIF_MSG_IFDOWN | \
46 NETIF_MSG_IFUP | \
47 NETIF_MSG_RX_ERR | \
48 NETIF_MSG_TX_ERR)
49
50 /* length of time before we decide the hardware is borked,
51 * and dev->tx_timeout() should be called to fix the problem
52 */
53 #define B44_TX_TIMEOUT (5 * HZ)
54
55 /* hardware minimum and maximum for a single frame's data payload */
56 #define B44_MIN_MTU 60
57 #define B44_MAX_MTU 1500
58
59 #define B44_RX_RING_SIZE 512
60 #define B44_DEF_RX_RING_PENDING 200
61 #define B44_RX_RING_BYTES (sizeof(struct dma_desc) * \
62 B44_RX_RING_SIZE)
63 #define B44_TX_RING_SIZE 512
64 #define B44_DEF_TX_RING_PENDING (B44_TX_RING_SIZE - 1)
65 #define B44_TX_RING_BYTES (sizeof(struct dma_desc) * \
66 B44_TX_RING_SIZE)
67
68 #define TX_RING_GAP(BP) \
69 (B44_TX_RING_SIZE - (BP)->tx_pending)
70 #define TX_BUFFS_AVAIL(BP) \
71 (((BP)->tx_cons <= (BP)->tx_prod) ? \
72 (BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod : \
73 (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP))
74 #define NEXT_TX(N) (((N) + 1) & (B44_TX_RING_SIZE - 1))
75
76 #define RX_PKT_OFFSET (RX_HEADER_LEN + 2)
77 #define RX_PKT_BUF_SZ (1536 + RX_PKT_OFFSET)
78
79 /* minimum number of free TX descriptors required to wake up TX process */
80 #define B44_TX_WAKEUP_THRESH (B44_TX_RING_SIZE / 4)
81
82 /* b44 internal pattern match filter info */
83 #define B44_PATTERN_BASE 0x400
84 #define B44_PATTERN_SIZE 0x80
85 #define B44_PMASK_BASE 0x600
86 #define B44_PMASK_SIZE 0x10
87 #define B44_MAX_PATTERNS 16
88 #define B44_ETHIPV6UDP_HLEN 62
89 #define B44_ETHIPV4UDP_HLEN 42
90
91 static char version[] __devinitdata =
92 DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION "\n";
93
94 MODULE_AUTHOR("Felix Fietkau, Florian Schirmer, Pekka Pietikainen, David S. Miller");
95 MODULE_DESCRIPTION("Broadcom 44xx/47xx 10/100 PCI ethernet driver");
96 MODULE_LICENSE("GPL");
97 MODULE_VERSION(DRV_MODULE_VERSION);
98
99 static int b44_debug = -1; /* -1 == use B44_DEF_MSG_ENABLE as value */
100 module_param(b44_debug, int, 0);
101 MODULE_PARM_DESC(b44_debug, "B44 bitmapped debugging message enable value");
102
103
104 #ifdef CONFIG_B44_PCI
105 static const struct pci_device_id b44_pci_tbl[] = {
106 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401) },
107 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0) },
108 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1) },
109 { 0 } /* terminate list with empty entry */
110 };
111 MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
112
113 static struct pci_driver b44_pci_driver = {
114 .name = DRV_MODULE_NAME,
115 .id_table = b44_pci_tbl,
116 };
117 #endif /* CONFIG_B44_PCI */
118
119 static const struct ssb_device_id b44_ssb_tbl[] = {
120 SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET, SSB_ANY_REV),
121 SSB_DEVTABLE_END
122 };
123 MODULE_DEVICE_TABLE(ssb, b44_ssb_tbl);
124
125 static void b44_halt(struct b44 *);
126 static void b44_init_rings(struct b44 *);
127
128 #define B44_FULL_RESET 1
129 #define B44_FULL_RESET_SKIP_PHY 2
130 #define B44_PARTIAL_RESET 3
131 #define B44_CHIP_RESET_FULL 4
132 #define B44_CHIP_RESET_PARTIAL 5
133
134 static void b44_init_hw(struct b44 *, int);
135
136 static int dma_desc_align_mask;
137 static int dma_desc_sync_size;
138 static int instance;
139
140 static const char b44_gstrings[][ETH_GSTRING_LEN] = {
141 #define _B44(x...) # x,
142 B44_STAT_REG_DECLARE
143 #undef _B44
144 };
145
146 static inline void b44_sync_dma_desc_for_device(struct ssb_device *sdev,
147 dma_addr_t dma_base,
148 unsigned long offset,
149 enum dma_data_direction dir)
150 {
151 ssb_dma_sync_single_range_for_device(sdev, dma_base,
152 offset & dma_desc_align_mask,
153 dma_desc_sync_size, dir);
154 }
155
156 static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
157 dma_addr_t dma_base,
158 unsigned long offset,
159 enum dma_data_direction dir)
160 {
161 ssb_dma_sync_single_range_for_cpu(sdev, dma_base,
162 offset & dma_desc_align_mask,
163 dma_desc_sync_size, dir);
164 }
165
166 static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
167 {
168 return ssb_read32(bp->sdev, reg);
169 }
170
171 static inline void bw32(const struct b44 *bp,
172 unsigned long reg, unsigned long val)
173 {
174 ssb_write32(bp->sdev, reg, val);
175 }
176
177 static int b44_wait_bit(struct b44 *bp, unsigned long reg,
178 u32 bit, unsigned long timeout, const int clear)
179 {
180 unsigned long i;
181
182 for (i = 0; i < timeout; i++) {
183 u32 val = br32(bp, reg);
184
185 if (clear && !(val & bit))
186 break;
187 if (!clear && (val & bit))
188 break;
189 udelay(10);
190 }
191 if (i == timeout) {
192 printk(KERN_ERR PFX "%s: BUG! Timeout waiting for bit %08x of register "
193 "%lx to %s.\n",
194 bp->dev->name,
195 bit, reg,
196 (clear ? "clear" : "set"));
197 return -ENODEV;
198 }
199 return 0;
200 }
201
202 static inline void __b44_cam_read(struct b44 *bp, unsigned char *data, int index)
203 {
204 u32 val;
205
206 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_READ |
207 (index << CAM_CTRL_INDEX_SHIFT)));
208
209 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
210
211 val = br32(bp, B44_CAM_DATA_LO);
212
213 data[2] = (val >> 24) & 0xFF;
214 data[3] = (val >> 16) & 0xFF;
215 data[4] = (val >> 8) & 0xFF;
216 data[5] = (val >> 0) & 0xFF;
217
218 val = br32(bp, B44_CAM_DATA_HI);
219
220 data[0] = (val >> 8) & 0xFF;
221 data[1] = (val >> 0) & 0xFF;
222 }
223
224 static inline void __b44_cam_write(struct b44 *bp, unsigned char *data, int index)
225 {
226 u32 val;
227
228 val = ((u32) data[2]) << 24;
229 val |= ((u32) data[3]) << 16;
230 val |= ((u32) data[4]) << 8;
231 val |= ((u32) data[5]) << 0;
232 bw32(bp, B44_CAM_DATA_LO, val);
233 val = (CAM_DATA_HI_VALID |
234 (((u32) data[0]) << 8) |
235 (((u32) data[1]) << 0));
236 bw32(bp, B44_CAM_DATA_HI, val);
237 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE |
238 (index << CAM_CTRL_INDEX_SHIFT)));
239 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
240 }
241
242 static inline void __b44_disable_ints(struct b44 *bp)
243 {
244 bw32(bp, B44_IMASK, 0);
245 }
246
247 static void b44_disable_ints(struct b44 *bp)
248 {
249 __b44_disable_ints(bp);
250
251 /* Flush posted writes. */
252 br32(bp, B44_IMASK);
253 }
254
255 static void b44_enable_ints(struct b44 *bp)
256 {
257 bw32(bp, B44_IMASK, bp->imask);
258 }
259
260 static int __b44_readphy(struct b44 *bp, int phy_addr, int reg, u32 *val)
261 {
262 int err;
263
264 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
265 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
266 (MDIO_OP_READ << MDIO_DATA_OP_SHIFT) |
267 (phy_addr << MDIO_DATA_PMD_SHIFT) |
268 (reg << MDIO_DATA_RA_SHIFT) |
269 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT)));
270 err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
271 *val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
272
273 return err;
274 }
275
276 static int __b44_writephy(struct b44 *bp, int phy_addr, int reg, u32 val)
277 {
278 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
279 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
280 (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) |
281 (phy_addr << MDIO_DATA_PMD_SHIFT) |
282 (reg << MDIO_DATA_RA_SHIFT) |
283 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) |
284 (val & MDIO_DATA_DATA)));
285 return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
286 }
287
288 static inline int b44_readphy(struct b44 *bp, int reg, u32 *val)
289 {
290 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
291 return 0;
292
293 return __b44_readphy(bp, bp->phy_addr, reg, val);
294 }
295
296 static inline int b44_writephy(struct b44 *bp, int reg, u32 val)
297 {
298 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
299 return 0;
300
301 return __b44_writephy(bp, bp->phy_addr, reg, val);
302 }
303
304 /* miilib interface */
305 static int b44_mii_read(struct net_device *dev, int phy_id, int location)
306 {
307 u32 val;
308 struct b44 *bp = netdev_priv(dev);
309 int rc = __b44_readphy(bp, phy_id, location, &val);
310 if (rc)
311 return 0xffffffff;
312 return val;
313 }
314
315 static void b44_mii_write(struct net_device *dev, int phy_id, int location,
316 int val)
317 {
318 struct b44 *bp = netdev_priv(dev);
319 __b44_writephy(bp, phy_id, location, val);
320 }
321
322 static int b44_phy_reset(struct b44 *bp)
323 {
324 u32 val;
325 int err;
326
327 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
328 return 0;
329 err = b44_writephy(bp, MII_BMCR, BMCR_RESET);
330 if (err)
331 return err;
332 udelay(100);
333 err = b44_readphy(bp, MII_BMCR, &val);
334 if (!err) {
335 if (val & BMCR_RESET) {
336 printk(KERN_ERR PFX "%s: PHY Reset would not complete.\n",
337 bp->dev->name);
338 err = -ENODEV;
339 }
340 }
341
342 return 0;
343 }
344
345 static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags)
346 {
347 u32 val;
348
349 bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE);
350 bp->flags |= pause_flags;
351
352 val = br32(bp, B44_RXCONFIG);
353 if (pause_flags & B44_FLAG_RX_PAUSE)
354 val |= RXCONFIG_FLOW;
355 else
356 val &= ~RXCONFIG_FLOW;
357 bw32(bp, B44_RXCONFIG, val);
358
359 val = br32(bp, B44_MAC_FLOW);
360 if (pause_flags & B44_FLAG_TX_PAUSE)
361 val |= (MAC_FLOW_PAUSE_ENAB |
362 (0xc0 & MAC_FLOW_RX_HI_WATER));
363 else
364 val &= ~MAC_FLOW_PAUSE_ENAB;
365 bw32(bp, B44_MAC_FLOW, val);
366 }
367
368 static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote)
369 {
370 u32 pause_enab = 0;
371
372 /* The driver supports only rx pause by default because
373 the b44 mac tx pause mechanism generates excessive
374 pause frames.
375 Use ethtool to turn on b44 tx pause if necessary.
376 */
377 if ((local & ADVERTISE_PAUSE_CAP) &&
378 (local & ADVERTISE_PAUSE_ASYM)){
379 if ((remote & LPA_PAUSE_ASYM) &&
380 !(remote & LPA_PAUSE_CAP))
381 pause_enab |= B44_FLAG_RX_PAUSE;
382 }
383
384 __b44_set_flow_ctrl(bp, pause_enab);
385 }
386
387 #ifdef SSB_DRIVER_MIPS
388 extern char *nvram_get(char *name);
389 static void b44_wap54g10_workaround(struct b44 *bp)
390 {
391 const char *str;
392 u32 val;
393 int err;
394
395 /*
396 * workaround for bad hardware design in Linksys WAP54G v1.0
397 * see https://dev.openwrt.org/ticket/146
398 * check and reset bit "isolate"
399 */
400 str = nvram_get("boardnum");
401 if (!str)
402 return;
403 if (simple_strtoul(str, NULL, 0) == 2) {
404 err = __b44_readphy(bp, 0, MII_BMCR, &val);
405 if (err)
406 goto error;
407 if (!(val & BMCR_ISOLATE))
408 return;
409 val &= ~BMCR_ISOLATE;
410 err = __b44_writephy(bp, 0, MII_BMCR, val);
411 if (err)
412 goto error;
413 }
414 return;
415 error:
416 printk(KERN_WARNING PFX "PHY: cannot reset MII transceiver isolate bit.\n");
417 }
418 #else
419 static inline void b44_wap54g10_workaround(struct b44 *bp)
420 {
421 }
422 #endif
423
424 static int b44_setup_phy(struct b44 *bp)
425 {
426 u32 val;
427 int err;
428
429 b44_wap54g10_workaround(bp);
430
431 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
432 return 0;
433 if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0)
434 goto out;
435 if ((err = b44_writephy(bp, B44_MII_ALEDCTRL,
436 val & MII_ALEDCTRL_ALLMSK)) != 0)
437 goto out;
438 if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0)
439 goto out;
440 if ((err = b44_writephy(bp, B44_MII_TLEDCTRL,
441 val | MII_TLEDCTRL_ENABLE)) != 0)
442 goto out;
443
444 if (!(bp->flags & B44_FLAG_FORCE_LINK)) {
445 u32 adv = ADVERTISE_CSMA;
446
447 if (bp->flags & B44_FLAG_ADV_10HALF)
448 adv |= ADVERTISE_10HALF;
449 if (bp->flags & B44_FLAG_ADV_10FULL)
450 adv |= ADVERTISE_10FULL;
451 if (bp->flags & B44_FLAG_ADV_100HALF)
452 adv |= ADVERTISE_100HALF;
453 if (bp->flags & B44_FLAG_ADV_100FULL)
454 adv |= ADVERTISE_100FULL;
455
456 if (bp->flags & B44_FLAG_PAUSE_AUTO)
457 adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
458
459 if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0)
460 goto out;
461 if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE |
462 BMCR_ANRESTART))) != 0)
463 goto out;
464 } else {
465 u32 bmcr;
466
467 if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0)
468 goto out;
469 bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100);
470 if (bp->flags & B44_FLAG_100_BASE_T)
471 bmcr |= BMCR_SPEED100;
472 if (bp->flags & B44_FLAG_FULL_DUPLEX)
473 bmcr |= BMCR_FULLDPLX;
474 if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0)
475 goto out;
476
477 /* Since we will not be negotiating there is no safe way
478 * to determine if the link partner supports flow control
479 * or not. So just disable it completely in this case.
480 */
481 b44_set_flow_ctrl(bp, 0, 0);
482 }
483
484 out:
485 return err;
486 }
487
488 static void b44_stats_update(struct b44 *bp)
489 {
490 unsigned long reg;
491 u32 *val;
492
493 val = &bp->hw_stats.tx_good_octets;
494 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) {
495 *val++ += br32(bp, reg);
496 }
497
498 /* Pad */
499 reg += 8*4UL;
500
501 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) {
502 *val++ += br32(bp, reg);
503 }
504 }
505
506 static void b44_link_report(struct b44 *bp)
507 {
508 if (!netif_carrier_ok(bp->dev)) {
509 printk(KERN_INFO PFX "%s: Link is down.\n", bp->dev->name);
510 } else {
511 printk(KERN_INFO PFX "%s: Link is up at %d Mbps, %s duplex.\n",
512 bp->dev->name,
513 (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
514 (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
515
516 printk(KERN_INFO PFX "%s: Flow control is %s for TX and "
517 "%s for RX.\n",
518 bp->dev->name,
519 (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off",
520 (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off");
521 }
522 }
523
524 static void b44_check_phy(struct b44 *bp)
525 {
526 u32 bmsr, aux;
527
528 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) {
529 bp->flags |= B44_FLAG_100_BASE_T;
530 bp->flags |= B44_FLAG_FULL_DUPLEX;
531 if (!netif_carrier_ok(bp->dev)) {
532 u32 val = br32(bp, B44_TX_CTRL);
533 val |= TX_CTRL_DUPLEX;
534 bw32(bp, B44_TX_CTRL, val);
535 netif_carrier_on(bp->dev);
536 b44_link_report(bp);
537 }
538 return;
539 }
540
541 if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
542 !b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
543 (bmsr != 0xffff)) {
544 if (aux & MII_AUXCTRL_SPEED)
545 bp->flags |= B44_FLAG_100_BASE_T;
546 else
547 bp->flags &= ~B44_FLAG_100_BASE_T;
548 if (aux & MII_AUXCTRL_DUPLEX)
549 bp->flags |= B44_FLAG_FULL_DUPLEX;
550 else
551 bp->flags &= ~B44_FLAG_FULL_DUPLEX;
552
553 if (!netif_carrier_ok(bp->dev) &&
554 (bmsr & BMSR_LSTATUS)) {
555 u32 val = br32(bp, B44_TX_CTRL);
556 u32 local_adv, remote_adv;
557
558 if (bp->flags & B44_FLAG_FULL_DUPLEX)
559 val |= TX_CTRL_DUPLEX;
560 else
561 val &= ~TX_CTRL_DUPLEX;
562 bw32(bp, B44_TX_CTRL, val);
563
564 if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
565 !b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
566 !b44_readphy(bp, MII_LPA, &remote_adv))
567 b44_set_flow_ctrl(bp, local_adv, remote_adv);
568
569 /* Link now up */
570 netif_carrier_on(bp->dev);
571 b44_link_report(bp);
572 } else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
573 /* Link now down */
574 netif_carrier_off(bp->dev);
575 b44_link_report(bp);
576 }
577
578 if (bmsr & BMSR_RFAULT)
579 printk(KERN_WARNING PFX "%s: Remote fault detected in PHY\n",
580 bp->dev->name);
581 if (bmsr & BMSR_JCD)
582 printk(KERN_WARNING PFX "%s: Jabber detected in PHY\n",
583 bp->dev->name);
584 }
585 }
586
587 static void b44_timer(unsigned long __opaque)
588 {
589 struct b44 *bp = (struct b44 *) __opaque;
590
591 spin_lock_irq(&bp->lock);
592
593 b44_check_phy(bp);
594
595 b44_stats_update(bp);
596
597 spin_unlock_irq(&bp->lock);
598
599 mod_timer(&bp->timer, round_jiffies(jiffies + HZ));
600 }
601
602 static void b44_tx(struct b44 *bp)
603 {
604 u32 cur, cons;
605
606 cur = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
607 cur /= sizeof(struct dma_desc);
608
609 /* XXX needs updating when NETIF_F_SG is supported */
610 for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) {
611 struct ring_info *rp = &bp->tx_buffers[cons];
612 struct sk_buff *skb = rp->skb;
613
614 BUG_ON(skb == NULL);
615
616 ssb_dma_unmap_single(bp->sdev,
617 rp->mapping,
618 skb->len,
619 DMA_TO_DEVICE);
620 rp->skb = NULL;
621 dev_kfree_skb_irq(skb);
622 }
623
624 bp->tx_cons = cons;
625 if (netif_queue_stopped(bp->dev) &&
626 TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
627 netif_wake_queue(bp->dev);
628
629 bw32(bp, B44_GPTIMER, 0);
630 }
631
632 /* Works like this. This chip writes a 'struct rx_header" 30 bytes
633 * before the DMA address you give it. So we allocate 30 more bytes
634 * for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then
635 * point the chip at 30 bytes past where the rx_header will go.
636 */
637 static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
638 {
639 struct dma_desc *dp;
640 struct ring_info *src_map, *map;
641 struct rx_header *rh;
642 struct sk_buff *skb;
643 dma_addr_t mapping;
644 int dest_idx;
645 u32 ctrl;
646
647 src_map = NULL;
648 if (src_idx >= 0)
649 src_map = &bp->rx_buffers[src_idx];
650 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
651 map = &bp->rx_buffers[dest_idx];
652 skb = netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ);
653 if (skb == NULL)
654 return -ENOMEM;
655
656 mapping = ssb_dma_map_single(bp->sdev, skb->data,
657 RX_PKT_BUF_SZ,
658 DMA_FROM_DEVICE);
659
660 /* Hardware bug work-around, the chip is unable to do PCI DMA
661 to/from anything above 1GB :-( */
662 if (ssb_dma_mapping_error(bp->sdev, mapping) ||
663 mapping + RX_PKT_BUF_SZ > DMA_30BIT_MASK) {
664 /* Sigh... */
665 if (!ssb_dma_mapping_error(bp->sdev, mapping))
666 ssb_dma_unmap_single(bp->sdev, mapping,
667 RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
668 dev_kfree_skb_any(skb);
669 skb = __netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ, GFP_ATOMIC|GFP_DMA);
670 if (skb == NULL)
671 return -ENOMEM;
672 mapping = ssb_dma_map_single(bp->sdev, skb->data,
673 RX_PKT_BUF_SZ,
674 DMA_FROM_DEVICE);
675 if (ssb_dma_mapping_error(bp->sdev, mapping) ||
676 mapping + RX_PKT_BUF_SZ > DMA_30BIT_MASK) {
677 if (!ssb_dma_mapping_error(bp->sdev, mapping))
678 ssb_dma_unmap_single(bp->sdev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
679 dev_kfree_skb_any(skb);
680 return -ENOMEM;
681 }
682 bp->force_copybreak = 1;
683 }
684
685 rh = (struct rx_header *) skb->data;
686
687 rh->len = 0;
688 rh->flags = 0;
689
690 map->skb = skb;
691 map->mapping = mapping;
692
693 if (src_map != NULL)
694 src_map->skb = NULL;
695
696 ctrl = (DESC_CTRL_LEN & RX_PKT_BUF_SZ);
697 if (dest_idx == (B44_RX_RING_SIZE - 1))
698 ctrl |= DESC_CTRL_EOT;
699
700 dp = &bp->rx_ring[dest_idx];
701 dp->ctrl = cpu_to_le32(ctrl);
702 dp->addr = cpu_to_le32((u32) mapping + bp->dma_offset);
703
704 if (bp->flags & B44_FLAG_RX_RING_HACK)
705 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
706 dest_idx * sizeof(dp),
707 DMA_BIDIRECTIONAL);
708
709 return RX_PKT_BUF_SZ;
710 }
711
712 static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
713 {
714 struct dma_desc *src_desc, *dest_desc;
715 struct ring_info *src_map, *dest_map;
716 struct rx_header *rh;
717 int dest_idx;
718 __le32 ctrl;
719
720 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
721 dest_desc = &bp->rx_ring[dest_idx];
722 dest_map = &bp->rx_buffers[dest_idx];
723 src_desc = &bp->rx_ring[src_idx];
724 src_map = &bp->rx_buffers[src_idx];
725
726 dest_map->skb = src_map->skb;
727 rh = (struct rx_header *) src_map->skb->data;
728 rh->len = 0;
729 rh->flags = 0;
730 dest_map->mapping = src_map->mapping;
731
732 if (bp->flags & B44_FLAG_RX_RING_HACK)
733 b44_sync_dma_desc_for_cpu(bp->sdev, bp->rx_ring_dma,
734 src_idx * sizeof(src_desc),
735 DMA_BIDIRECTIONAL);
736
737 ctrl = src_desc->ctrl;
738 if (dest_idx == (B44_RX_RING_SIZE - 1))
739 ctrl |= cpu_to_le32(DESC_CTRL_EOT);
740 else
741 ctrl &= cpu_to_le32(~DESC_CTRL_EOT);
742
743 dest_desc->ctrl = ctrl;
744 dest_desc->addr = src_desc->addr;
745
746 src_map->skb = NULL;
747
748 if (bp->flags & B44_FLAG_RX_RING_HACK)
749 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
750 dest_idx * sizeof(dest_desc),
751 DMA_BIDIRECTIONAL);
752
753 ssb_dma_sync_single_for_device(bp->sdev, le32_to_cpu(src_desc->addr),
754 RX_PKT_BUF_SZ,
755 DMA_FROM_DEVICE);
756 }
757
758 static int b44_rx(struct b44 *bp, int budget)
759 {
760 int received;
761 u32 cons, prod;
762
763 received = 0;
764 prod = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK;
765 prod /= sizeof(struct dma_desc);
766 cons = bp->rx_cons;
767
768 while (cons != prod && budget > 0) {
769 struct ring_info *rp = &bp->rx_buffers[cons];
770 struct sk_buff *skb = rp->skb;
771 dma_addr_t map = rp->mapping;
772 struct rx_header *rh;
773 u16 len;
774
775 ssb_dma_sync_single_for_cpu(bp->sdev, map,
776 RX_PKT_BUF_SZ,
777 DMA_FROM_DEVICE);
778 rh = (struct rx_header *) skb->data;
779 len = le16_to_cpu(rh->len);
780 if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) ||
781 (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
782 drop_it:
783 b44_recycle_rx(bp, cons, bp->rx_prod);
784 drop_it_no_recycle:
785 bp->stats.rx_dropped++;
786 goto next_pkt;
787 }
788
789 if (len == 0) {
790 int i = 0;
791
792 do {
793 udelay(2);
794 barrier();
795 len = le16_to_cpu(rh->len);
796 } while (len == 0 && i++ < 5);
797 if (len == 0)
798 goto drop_it;
799 }
800
801 /* Omit CRC. */
802 len -= 4;
803
804 if (!bp->force_copybreak && len > RX_COPY_THRESHOLD) {
805 int skb_size;
806 skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
807 if (skb_size < 0)
808 goto drop_it;
809 ssb_dma_unmap_single(bp->sdev, map,
810 skb_size, DMA_FROM_DEVICE);
811 /* Leave out rx_header */
812 skb_put(skb, len + RX_PKT_OFFSET);
813 skb_pull(skb, RX_PKT_OFFSET);
814 } else {
815 struct sk_buff *copy_skb;
816
817 b44_recycle_rx(bp, cons, bp->rx_prod);
818 copy_skb = dev_alloc_skb(len + 2);
819 if (copy_skb == NULL)
820 goto drop_it_no_recycle;
821
822 skb_reserve(copy_skb, 2);
823 skb_put(copy_skb, len);
824 /* DMA sync done above, copy just the actual packet */
825 skb_copy_from_linear_data_offset(skb, RX_PKT_OFFSET,
826 copy_skb->data, len);
827 skb = copy_skb;
828 }
829 skb->ip_summed = CHECKSUM_NONE;
830 skb->protocol = eth_type_trans(skb, bp->dev);
831 netif_receive_skb(skb);
832 received++;
833 budget--;
834 next_pkt:
835 bp->rx_prod = (bp->rx_prod + 1) &
836 (B44_RX_RING_SIZE - 1);
837 cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
838 }
839
840 bp->rx_cons = cons;
841 bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
842
843 return received;
844 }
845
846 static int b44_poll(struct napi_struct *napi, int budget)
847 {
848 struct b44 *bp = container_of(napi, struct b44, napi);
849 int work_done;
850
851 spin_lock_irq(&bp->lock);
852
853 if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
854 /* spin_lock(&bp->tx_lock); */
855 b44_tx(bp);
856 /* spin_unlock(&bp->tx_lock); */
857 }
858 spin_unlock_irq(&bp->lock);
859
860 work_done = 0;
861 if (bp->istat & ISTAT_RX)
862 work_done += b44_rx(bp, budget);
863
864 if (bp->istat & ISTAT_ERRORS) {
865 unsigned long flags;
866
867 spin_lock_irqsave(&bp->lock, flags);
868 b44_halt(bp);
869 b44_init_rings(bp);
870 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
871 netif_wake_queue(bp->dev);
872 spin_unlock_irqrestore(&bp->lock, flags);
873 work_done = 0;
874 }
875
876 if (work_done < budget) {
877 napi_complete(napi);
878 b44_enable_ints(bp);
879 }
880
881 return work_done;
882 }
883
884 static irqreturn_t b44_interrupt(int irq, void *dev_id)
885 {
886 struct net_device *dev = dev_id;
887 struct b44 *bp = netdev_priv(dev);
888 u32 istat, imask;
889 int handled = 0;
890
891 spin_lock(&bp->lock);
892
893 istat = br32(bp, B44_ISTAT);
894 imask = br32(bp, B44_IMASK);
895
896 /* The interrupt mask register controls which interrupt bits
897 * will actually raise an interrupt to the CPU when set by hw/firmware,
898 * but doesn't mask off the bits.
899 */
900 istat &= imask;
901 if (istat) {
902 handled = 1;
903
904 if (unlikely(!netif_running(dev))) {
905 printk(KERN_INFO "%s: late interrupt.\n", dev->name);
906 goto irq_ack;
907 }
908
909 if (napi_schedule_prep(&bp->napi)) {
910 /* NOTE: These writes are posted by the readback of
911 * the ISTAT register below.
912 */
913 bp->istat = istat;
914 __b44_disable_ints(bp);
915 __napi_schedule(&bp->napi);
916 } else {
917 printk(KERN_ERR PFX "%s: Error, poll already scheduled\n",
918 dev->name);
919 }
920
921 irq_ack:
922 bw32(bp, B44_ISTAT, istat);
923 br32(bp, B44_ISTAT);
924 }
925 spin_unlock(&bp->lock);
926 return IRQ_RETVAL(handled);
927 }
928
929 static void b44_tx_timeout(struct net_device *dev)
930 {
931 struct b44 *bp = netdev_priv(dev);
932
933 printk(KERN_ERR PFX "%s: transmit timed out, resetting\n",
934 dev->name);
935
936 spin_lock_irq(&bp->lock);
937
938 b44_halt(bp);
939 b44_init_rings(bp);
940 b44_init_hw(bp, B44_FULL_RESET);
941
942 spin_unlock_irq(&bp->lock);
943
944 b44_enable_ints(bp);
945
946 netif_wake_queue(dev);
947 }
948
949 static int b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
950 {
951 struct b44 *bp = netdev_priv(dev);
952 int rc = NETDEV_TX_OK;
953 dma_addr_t mapping;
954 u32 len, entry, ctrl;
955
956 len = skb->len;
957 spin_lock_irq(&bp->lock);
958
959 /* This is a hard error, log it. */
960 if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
961 netif_stop_queue(dev);
962 printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
963 dev->name);
964 goto err_out;
965 }
966
967 mapping = ssb_dma_map_single(bp->sdev, skb->data, len, DMA_TO_DEVICE);
968 if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_30BIT_MASK) {
969 struct sk_buff *bounce_skb;
970
971 /* Chip can't handle DMA to/from >1GB, use bounce buffer */
972 if (!ssb_dma_mapping_error(bp->sdev, mapping))
973 ssb_dma_unmap_single(bp->sdev, mapping, len,
974 DMA_TO_DEVICE);
975
976 bounce_skb = __dev_alloc_skb(len, GFP_ATOMIC | GFP_DMA);
977 if (!bounce_skb)
978 goto err_out;
979
980 mapping = ssb_dma_map_single(bp->sdev, bounce_skb->data,
981 len, DMA_TO_DEVICE);
982 if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_30BIT_MASK) {
983 if (!ssb_dma_mapping_error(bp->sdev, mapping))
984 ssb_dma_unmap_single(bp->sdev, mapping,
985 len, DMA_TO_DEVICE);
986 dev_kfree_skb_any(bounce_skb);
987 goto err_out;
988 }
989
990 skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
991 dev_kfree_skb_any(skb);
992 skb = bounce_skb;
993 }
994
995 entry = bp->tx_prod;
996 bp->tx_buffers[entry].skb = skb;
997 bp->tx_buffers[entry].mapping = mapping;
998
999 ctrl = (len & DESC_CTRL_LEN);
1000 ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
1001 if (entry == (B44_TX_RING_SIZE - 1))
1002 ctrl |= DESC_CTRL_EOT;
1003
1004 bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1005 bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1006
1007 if (bp->flags & B44_FLAG_TX_RING_HACK)
1008 b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
1009 entry * sizeof(bp->tx_ring[0]),
1010 DMA_TO_DEVICE);
1011
1012 entry = NEXT_TX(entry);
1013
1014 bp->tx_prod = entry;
1015
1016 wmb();
1017
1018 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1019 if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1020 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1021 if (bp->flags & B44_FLAG_REORDER_BUG)
1022 br32(bp, B44_DMATX_PTR);
1023
1024 if (TX_BUFFS_AVAIL(bp) < 1)
1025 netif_stop_queue(dev);
1026
1027 dev->trans_start = jiffies;
1028
1029 out_unlock:
1030 spin_unlock_irq(&bp->lock);
1031
1032 return rc;
1033
1034 err_out:
1035 rc = NETDEV_TX_BUSY;
1036 goto out_unlock;
1037 }
1038
1039 static int b44_change_mtu(struct net_device *dev, int new_mtu)
1040 {
1041 struct b44 *bp = netdev_priv(dev);
1042
1043 if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
1044 return -EINVAL;
1045
1046 if (!netif_running(dev)) {
1047 /* We'll just catch it later when the
1048 * device is up'd.
1049 */
1050 dev->mtu = new_mtu;
1051 return 0;
1052 }
1053
1054 spin_lock_irq(&bp->lock);
1055 b44_halt(bp);
1056 dev->mtu = new_mtu;
1057 b44_init_rings(bp);
1058 b44_init_hw(bp, B44_FULL_RESET);
1059 spin_unlock_irq(&bp->lock);
1060
1061 b44_enable_ints(bp);
1062
1063 return 0;
1064 }
1065
1066 /* Free up pending packets in all rx/tx rings.
1067 *
1068 * The chip has been shut down and the driver detached from
1069 * the networking, so no interrupts or new tx packets will
1070 * end up in the driver. bp->lock is not held and we are not
1071 * in an interrupt context and thus may sleep.
1072 */
1073 static void b44_free_rings(struct b44 *bp)
1074 {
1075 struct ring_info *rp;
1076 int i;
1077
1078 for (i = 0; i < B44_RX_RING_SIZE; i++) {
1079 rp = &bp->rx_buffers[i];
1080
1081 if (rp->skb == NULL)
1082 continue;
1083 ssb_dma_unmap_single(bp->sdev, rp->mapping, RX_PKT_BUF_SZ,
1084 DMA_FROM_DEVICE);
1085 dev_kfree_skb_any(rp->skb);
1086 rp->skb = NULL;
1087 }
1088
1089 /* XXX needs changes once NETIF_F_SG is set... */
1090 for (i = 0; i < B44_TX_RING_SIZE; i++) {
1091 rp = &bp->tx_buffers[i];
1092
1093 if (rp->skb == NULL)
1094 continue;
1095 ssb_dma_unmap_single(bp->sdev, rp->mapping, rp->skb->len,
1096 DMA_TO_DEVICE);
1097 dev_kfree_skb_any(rp->skb);
1098 rp->skb = NULL;
1099 }
1100 }
1101
1102 /* Initialize tx/rx rings for packet processing.
1103 *
1104 * The chip has been shut down and the driver detached from
1105 * the networking, so no interrupts or new tx packets will
1106 * end up in the driver.
1107 */
1108 static void b44_init_rings(struct b44 *bp)
1109 {
1110 int i;
1111
1112 b44_free_rings(bp);
1113
1114 memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1115 memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1116
1117 if (bp->flags & B44_FLAG_RX_RING_HACK)
1118 ssb_dma_sync_single_for_device(bp->sdev, bp->rx_ring_dma,
1119 DMA_TABLE_BYTES,
1120 DMA_BIDIRECTIONAL);
1121
1122 if (bp->flags & B44_FLAG_TX_RING_HACK)
1123 ssb_dma_sync_single_for_device(bp->sdev, bp->tx_ring_dma,
1124 DMA_TABLE_BYTES,
1125 DMA_TO_DEVICE);
1126
1127 for (i = 0; i < bp->rx_pending; i++) {
1128 if (b44_alloc_rx_skb(bp, -1, i) < 0)
1129 break;
1130 }
1131 }
1132
1133 /*
1134 * Must not be invoked with interrupt sources disabled and
1135 * the hardware shutdown down.
1136 */
1137 static void b44_free_consistent(struct b44 *bp)
1138 {
1139 kfree(bp->rx_buffers);
1140 bp->rx_buffers = NULL;
1141 kfree(bp->tx_buffers);
1142 bp->tx_buffers = NULL;
1143 if (bp->rx_ring) {
1144 if (bp->flags & B44_FLAG_RX_RING_HACK) {
1145 ssb_dma_unmap_single(bp->sdev, bp->rx_ring_dma,
1146 DMA_TABLE_BYTES,
1147 DMA_BIDIRECTIONAL);
1148 kfree(bp->rx_ring);
1149 } else
1150 ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
1151 bp->rx_ring, bp->rx_ring_dma,
1152 GFP_KERNEL);
1153 bp->rx_ring = NULL;
1154 bp->flags &= ~B44_FLAG_RX_RING_HACK;
1155 }
1156 if (bp->tx_ring) {
1157 if (bp->flags & B44_FLAG_TX_RING_HACK) {
1158 ssb_dma_unmap_single(bp->sdev, bp->tx_ring_dma,
1159 DMA_TABLE_BYTES,
1160 DMA_TO_DEVICE);
1161 kfree(bp->tx_ring);
1162 } else
1163 ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
1164 bp->tx_ring, bp->tx_ring_dma,
1165 GFP_KERNEL);
1166 bp->tx_ring = NULL;
1167 bp->flags &= ~B44_FLAG_TX_RING_HACK;
1168 }
1169 }
1170
1171 /*
1172 * Must not be invoked with interrupt sources disabled and
1173 * the hardware shutdown down. Can sleep.
1174 */
1175 static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
1176 {
1177 int size;
1178
1179 size = B44_RX_RING_SIZE * sizeof(struct ring_info);
1180 bp->rx_buffers = kzalloc(size, gfp);
1181 if (!bp->rx_buffers)
1182 goto out_err;
1183
1184 size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1185 bp->tx_buffers = kzalloc(size, gfp);
1186 if (!bp->tx_buffers)
1187 goto out_err;
1188
1189 size = DMA_TABLE_BYTES;
1190 bp->rx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->rx_ring_dma, gfp);
1191 if (!bp->rx_ring) {
1192 /* Allocation may have failed due to pci_alloc_consistent
1193 insisting on use of GFP_DMA, which is more restrictive
1194 than necessary... */
1195 struct dma_desc *rx_ring;
1196 dma_addr_t rx_ring_dma;
1197
1198 rx_ring = kzalloc(size, gfp);
1199 if (!rx_ring)
1200 goto out_err;
1201
1202 rx_ring_dma = ssb_dma_map_single(bp->sdev, rx_ring,
1203 DMA_TABLE_BYTES,
1204 DMA_BIDIRECTIONAL);
1205
1206 if (ssb_dma_mapping_error(bp->sdev, rx_ring_dma) ||
1207 rx_ring_dma + size > DMA_30BIT_MASK) {
1208 kfree(rx_ring);
1209 goto out_err;
1210 }
1211
1212 bp->rx_ring = rx_ring;
1213 bp->rx_ring_dma = rx_ring_dma;
1214 bp->flags |= B44_FLAG_RX_RING_HACK;
1215 }
1216
1217 bp->tx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->tx_ring_dma, gfp);
1218 if (!bp->tx_ring) {
1219 /* Allocation may have failed due to ssb_dma_alloc_consistent
1220 insisting on use of GFP_DMA, which is more restrictive
1221 than necessary... */
1222 struct dma_desc *tx_ring;
1223 dma_addr_t tx_ring_dma;
1224
1225 tx_ring = kzalloc(size, gfp);
1226 if (!tx_ring)
1227 goto out_err;
1228
1229 tx_ring_dma = ssb_dma_map_single(bp->sdev, tx_ring,
1230 DMA_TABLE_BYTES,
1231 DMA_TO_DEVICE);
1232
1233 if (ssb_dma_mapping_error(bp->sdev, tx_ring_dma) ||
1234 tx_ring_dma + size > DMA_30BIT_MASK) {
1235 kfree(tx_ring);
1236 goto out_err;
1237 }
1238
1239 bp->tx_ring = tx_ring;
1240 bp->tx_ring_dma = tx_ring_dma;
1241 bp->flags |= B44_FLAG_TX_RING_HACK;
1242 }
1243
1244 return 0;
1245
1246 out_err:
1247 b44_free_consistent(bp);
1248 return -ENOMEM;
1249 }
1250
1251 /* bp->lock is held. */
1252 static void b44_clear_stats(struct b44 *bp)
1253 {
1254 unsigned long reg;
1255
1256 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1257 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1258 br32(bp, reg);
1259 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1260 br32(bp, reg);
1261 }
1262
1263 /* bp->lock is held. */
1264 static void b44_chip_reset(struct b44 *bp, int reset_kind)
1265 {
1266 struct ssb_device *sdev = bp->sdev;
1267
1268 if (ssb_device_is_enabled(bp->sdev)) {
1269 bw32(bp, B44_RCV_LAZY, 0);
1270 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1271 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1);
1272 bw32(bp, B44_DMATX_CTRL, 0);
1273 bp->tx_prod = bp->tx_cons = 0;
1274 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1275 b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1276 100, 0);
1277 }
1278 bw32(bp, B44_DMARX_CTRL, 0);
1279 bp->rx_prod = bp->rx_cons = 0;
1280 } else
1281 ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
1282
1283 ssb_device_enable(bp->sdev, 0);
1284 b44_clear_stats(bp);
1285
1286 /*
1287 * Don't enable PHY if we are doing a partial reset
1288 * we are probably going to power down
1289 */
1290 if (reset_kind == B44_CHIP_RESET_PARTIAL)
1291 return;
1292
1293 switch (sdev->bus->bustype) {
1294 case SSB_BUSTYPE_SSB:
1295 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1296 (((ssb_clockspeed(sdev->bus) + (B44_MDC_RATIO / 2)) / B44_MDC_RATIO)
1297 & MDIO_CTRL_MAXF_MASK)));
1298 break;
1299 case SSB_BUSTYPE_PCI:
1300 case SSB_BUSTYPE_PCMCIA:
1301 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1302 (0x0d & MDIO_CTRL_MAXF_MASK)));
1303 break;
1304 }
1305
1306 br32(bp, B44_MDIO_CTRL);
1307
1308 if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1309 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1310 br32(bp, B44_ENET_CTRL);
1311 bp->flags &= ~B44_FLAG_INTERNAL_PHY;
1312 } else {
1313 u32 val = br32(bp, B44_DEVCTRL);
1314
1315 if (val & DEVCTRL_EPR) {
1316 bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1317 br32(bp, B44_DEVCTRL);
1318 udelay(100);
1319 }
1320 bp->flags |= B44_FLAG_INTERNAL_PHY;
1321 }
1322 }
1323
1324 /* bp->lock is held. */
1325 static void b44_halt(struct b44 *bp)
1326 {
1327 b44_disable_ints(bp);
1328 /* reset PHY */
1329 b44_phy_reset(bp);
1330 /* power down PHY */
1331 printk(KERN_INFO PFX "%s: powering down PHY\n", bp->dev->name);
1332 bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
1333 /* now reset the chip, but without enabling the MAC&PHY
1334 * part of it. This has to be done _after_ we shut down the PHY */
1335 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1336 }
1337
1338 /* bp->lock is held. */
1339 static void __b44_set_mac_addr(struct b44 *bp)
1340 {
1341 bw32(bp, B44_CAM_CTRL, 0);
1342 if (!(bp->dev->flags & IFF_PROMISC)) {
1343 u32 val;
1344
1345 __b44_cam_write(bp, bp->dev->dev_addr, 0);
1346 val = br32(bp, B44_CAM_CTRL);
1347 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1348 }
1349 }
1350
1351 static int b44_set_mac_addr(struct net_device *dev, void *p)
1352 {
1353 struct b44 *bp = netdev_priv(dev);
1354 struct sockaddr *addr = p;
1355 u32 val;
1356
1357 if (netif_running(dev))
1358 return -EBUSY;
1359
1360 if (!is_valid_ether_addr(addr->sa_data))
1361 return -EINVAL;
1362
1363 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1364
1365 spin_lock_irq(&bp->lock);
1366
1367 val = br32(bp, B44_RXCONFIG);
1368 if (!(val & RXCONFIG_CAM_ABSENT))
1369 __b44_set_mac_addr(bp);
1370
1371 spin_unlock_irq(&bp->lock);
1372
1373 return 0;
1374 }
1375
1376 /* Called at device open time to get the chip ready for
1377 * packet processing. Invoked with bp->lock held.
1378 */
1379 static void __b44_set_rx_mode(struct net_device *);
1380 static void b44_init_hw(struct b44 *bp, int reset_kind)
1381 {
1382 u32 val;
1383
1384 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
1385 if (reset_kind == B44_FULL_RESET) {
1386 b44_phy_reset(bp);
1387 b44_setup_phy(bp);
1388 }
1389
1390 /* Enable CRC32, set proper LED modes and power on PHY */
1391 bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
1392 bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
1393
1394 /* This sets the MAC address too. */
1395 __b44_set_rx_mode(bp->dev);
1396
1397 /* MTU + eth header + possible VLAN tag + struct rx_header */
1398 bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1399 bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1400
1401 bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
1402 if (reset_kind == B44_PARTIAL_RESET) {
1403 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1404 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1405 } else {
1406 bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
1407 bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
1408 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1409 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1410 bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
1411
1412 bw32(bp, B44_DMARX_PTR, bp->rx_pending);
1413 bp->rx_prod = bp->rx_pending;
1414
1415 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1416 }
1417
1418 val = br32(bp, B44_ENET_CTRL);
1419 bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
1420 }
1421
1422 static int b44_open(struct net_device *dev)
1423 {
1424 struct b44 *bp = netdev_priv(dev);
1425 int err;
1426
1427 err = b44_alloc_consistent(bp, GFP_KERNEL);
1428 if (err)
1429 goto out;
1430
1431 napi_enable(&bp->napi);
1432
1433 b44_init_rings(bp);
1434 b44_init_hw(bp, B44_FULL_RESET);
1435
1436 b44_check_phy(bp);
1437
1438 err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
1439 if (unlikely(err < 0)) {
1440 napi_disable(&bp->napi);
1441 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1442 b44_free_rings(bp);
1443 b44_free_consistent(bp);
1444 goto out;
1445 }
1446
1447 init_timer(&bp->timer);
1448 bp->timer.expires = jiffies + HZ;
1449 bp->timer.data = (unsigned long) bp;
1450 bp->timer.function = b44_timer;
1451 add_timer(&bp->timer);
1452
1453 b44_enable_ints(bp);
1454 netif_start_queue(dev);
1455 out:
1456 return err;
1457 }
1458
1459 #ifdef CONFIG_NET_POLL_CONTROLLER
1460 /*
1461 * Polling receive - used by netconsole and other diagnostic tools
1462 * to allow network i/o with interrupts disabled.
1463 */
1464 static void b44_poll_controller(struct net_device *dev)
1465 {
1466 disable_irq(dev->irq);
1467 b44_interrupt(dev->irq, dev);
1468 enable_irq(dev->irq);
1469 }
1470 #endif
1471
1472 static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
1473 {
1474 u32 i;
1475 u32 *pattern = (u32 *) pp;
1476
1477 for (i = 0; i < bytes; i += sizeof(u32)) {
1478 bw32(bp, B44_FILT_ADDR, table_offset + i);
1479 bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
1480 }
1481 }
1482
1483 static int b44_magic_pattern(u8 *macaddr, u8 *ppattern, u8 *pmask, int offset)
1484 {
1485 int magicsync = 6;
1486 int k, j, len = offset;
1487 int ethaddr_bytes = ETH_ALEN;
1488
1489 memset(ppattern + offset, 0xff, magicsync);
1490 for (j = 0; j < magicsync; j++)
1491 set_bit(len++, (unsigned long *) pmask);
1492
1493 for (j = 0; j < B44_MAX_PATTERNS; j++) {
1494 if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
1495 ethaddr_bytes = ETH_ALEN;
1496 else
1497 ethaddr_bytes = B44_PATTERN_SIZE - len;
1498 if (ethaddr_bytes <=0)
1499 break;
1500 for (k = 0; k< ethaddr_bytes; k++) {
1501 ppattern[offset + magicsync +
1502 (j * ETH_ALEN) + k] = macaddr[k];
1503 len++;
1504 set_bit(len, (unsigned long *) pmask);
1505 }
1506 }
1507 return len - 1;
1508 }
1509
1510 /* Setup magic packet patterns in the b44 WOL
1511 * pattern matching filter.
1512 */
1513 static void b44_setup_pseudo_magicp(struct b44 *bp)
1514 {
1515
1516 u32 val;
1517 int plen0, plen1, plen2;
1518 u8 *pwol_pattern;
1519 u8 pwol_mask[B44_PMASK_SIZE];
1520
1521 pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
1522 if (!pwol_pattern) {
1523 printk(KERN_ERR PFX "Memory not available for WOL\n");
1524 return;
1525 }
1526
1527 /* Ipv4 magic packet pattern - pattern 0.*/
1528 memset(pwol_mask, 0, B44_PMASK_SIZE);
1529 plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1530 B44_ETHIPV4UDP_HLEN);
1531
1532 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
1533 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
1534
1535 /* Raw ethernet II magic packet pattern - pattern 1 */
1536 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1537 memset(pwol_mask, 0, B44_PMASK_SIZE);
1538 plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1539 ETH_HLEN);
1540
1541 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1542 B44_PATTERN_BASE + B44_PATTERN_SIZE);
1543 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1544 B44_PMASK_BASE + B44_PMASK_SIZE);
1545
1546 /* Ipv6 magic packet pattern - pattern 2 */
1547 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1548 memset(pwol_mask, 0, B44_PMASK_SIZE);
1549 plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1550 B44_ETHIPV6UDP_HLEN);
1551
1552 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1553 B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
1554 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1555 B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
1556
1557 kfree(pwol_pattern);
1558
1559 /* set these pattern's lengths: one less than each real length */
1560 val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
1561 bw32(bp, B44_WKUP_LEN, val);
1562
1563 /* enable wakeup pattern matching */
1564 val = br32(bp, B44_DEVCTRL);
1565 bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
1566
1567 }
1568
1569 #ifdef CONFIG_B44_PCI
1570 static void b44_setup_wol_pci(struct b44 *bp)
1571 {
1572 u16 val;
1573
1574 if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
1575 bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
1576 pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
1577 pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
1578 }
1579 }
1580 #else
1581 static inline void b44_setup_wol_pci(struct b44 *bp) { }
1582 #endif /* CONFIG_B44_PCI */
1583
1584 static void b44_setup_wol(struct b44 *bp)
1585 {
1586 u32 val;
1587
1588 bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
1589
1590 if (bp->flags & B44_FLAG_B0_ANDLATER) {
1591
1592 bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
1593
1594 val = bp->dev->dev_addr[2] << 24 |
1595 bp->dev->dev_addr[3] << 16 |
1596 bp->dev->dev_addr[4] << 8 |
1597 bp->dev->dev_addr[5];
1598 bw32(bp, B44_ADDR_LO, val);
1599
1600 val = bp->dev->dev_addr[0] << 8 |
1601 bp->dev->dev_addr[1];
1602 bw32(bp, B44_ADDR_HI, val);
1603
1604 val = br32(bp, B44_DEVCTRL);
1605 bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
1606
1607 } else {
1608 b44_setup_pseudo_magicp(bp);
1609 }
1610 b44_setup_wol_pci(bp);
1611 }
1612
1613 static int b44_close(struct net_device *dev)
1614 {
1615 struct b44 *bp = netdev_priv(dev);
1616
1617 netif_stop_queue(dev);
1618
1619 napi_disable(&bp->napi);
1620
1621 del_timer_sync(&bp->timer);
1622
1623 spin_lock_irq(&bp->lock);
1624
1625 b44_halt(bp);
1626 b44_free_rings(bp);
1627 netif_carrier_off(dev);
1628
1629 spin_unlock_irq(&bp->lock);
1630
1631 free_irq(dev->irq, dev);
1632
1633 if (bp->flags & B44_FLAG_WOL_ENABLE) {
1634 b44_init_hw(bp, B44_PARTIAL_RESET);
1635 b44_setup_wol(bp);
1636 }
1637
1638 b44_free_consistent(bp);
1639
1640 return 0;
1641 }
1642
1643 static struct net_device_stats *b44_get_stats(struct net_device *dev)
1644 {
1645 struct b44 *bp = netdev_priv(dev);
1646 struct net_device_stats *nstat = &bp->stats;
1647 struct b44_hw_stats *hwstat = &bp->hw_stats;
1648
1649 /* Convert HW stats into netdevice stats. */
1650 nstat->rx_packets = hwstat->rx_pkts;
1651 nstat->tx_packets = hwstat->tx_pkts;
1652 nstat->rx_bytes = hwstat->rx_octets;
1653 nstat->tx_bytes = hwstat->tx_octets;
1654 nstat->tx_errors = (hwstat->tx_jabber_pkts +
1655 hwstat->tx_oversize_pkts +
1656 hwstat->tx_underruns +
1657 hwstat->tx_excessive_cols +
1658 hwstat->tx_late_cols);
1659 nstat->multicast = hwstat->tx_multicast_pkts;
1660 nstat->collisions = hwstat->tx_total_cols;
1661
1662 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1663 hwstat->rx_undersize);
1664 nstat->rx_over_errors = hwstat->rx_missed_pkts;
1665 nstat->rx_frame_errors = hwstat->rx_align_errs;
1666 nstat->rx_crc_errors = hwstat->rx_crc_errs;
1667 nstat->rx_errors = (hwstat->rx_jabber_pkts +
1668 hwstat->rx_oversize_pkts +
1669 hwstat->rx_missed_pkts +
1670 hwstat->rx_crc_align_errs +
1671 hwstat->rx_undersize +
1672 hwstat->rx_crc_errs +
1673 hwstat->rx_align_errs +
1674 hwstat->rx_symbol_errs);
1675
1676 nstat->tx_aborted_errors = hwstat->tx_underruns;
1677 #if 0
1678 /* Carrier lost counter seems to be broken for some devices */
1679 nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1680 #endif
1681
1682 return nstat;
1683 }
1684
1685 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1686 {
1687 struct dev_mc_list *mclist;
1688 int i, num_ents;
1689
1690 num_ents = min_t(int, dev->mc_count, B44_MCAST_TABLE_SIZE);
1691 mclist = dev->mc_list;
1692 for (i = 0; mclist && i < num_ents; i++, mclist = mclist->next) {
1693 __b44_cam_write(bp, mclist->dmi_addr, i + 1);
1694 }
1695 return i+1;
1696 }
1697
1698 static void __b44_set_rx_mode(struct net_device *dev)
1699 {
1700 struct b44 *bp = netdev_priv(dev);
1701 u32 val;
1702
1703 val = br32(bp, B44_RXCONFIG);
1704 val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1705 if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
1706 val |= RXCONFIG_PROMISC;
1707 bw32(bp, B44_RXCONFIG, val);
1708 } else {
1709 unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
1710 int i = 1;
1711
1712 __b44_set_mac_addr(bp);
1713
1714 if ((dev->flags & IFF_ALLMULTI) ||
1715 (dev->mc_count > B44_MCAST_TABLE_SIZE))
1716 val |= RXCONFIG_ALLMULTI;
1717 else
1718 i = __b44_load_mcast(bp, dev);
1719
1720 for (; i < 64; i++)
1721 __b44_cam_write(bp, zero, i);
1722
1723 bw32(bp, B44_RXCONFIG, val);
1724 val = br32(bp, B44_CAM_CTRL);
1725 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1726 }
1727 }
1728
1729 static void b44_set_rx_mode(struct net_device *dev)
1730 {
1731 struct b44 *bp = netdev_priv(dev);
1732
1733 spin_lock_irq(&bp->lock);
1734 __b44_set_rx_mode(dev);
1735 spin_unlock_irq(&bp->lock);
1736 }
1737
1738 static u32 b44_get_msglevel(struct net_device *dev)
1739 {
1740 struct b44 *bp = netdev_priv(dev);
1741 return bp->msg_enable;
1742 }
1743
1744 static void b44_set_msglevel(struct net_device *dev, u32 value)
1745 {
1746 struct b44 *bp = netdev_priv(dev);
1747 bp->msg_enable = value;
1748 }
1749
1750 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1751 {
1752 struct b44 *bp = netdev_priv(dev);
1753 struct ssb_bus *bus = bp->sdev->bus;
1754
1755 strncpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
1756 strncpy(info->version, DRV_MODULE_VERSION, sizeof(info->driver));
1757 switch (bus->bustype) {
1758 case SSB_BUSTYPE_PCI:
1759 strncpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
1760 break;
1761 case SSB_BUSTYPE_PCMCIA:
1762 case SSB_BUSTYPE_SSB:
1763 strncpy(info->bus_info, "SSB", sizeof(info->bus_info));
1764 break;
1765 }
1766 }
1767
1768 static int b44_nway_reset(struct net_device *dev)
1769 {
1770 struct b44 *bp = netdev_priv(dev);
1771 u32 bmcr;
1772 int r;
1773
1774 spin_lock_irq(&bp->lock);
1775 b44_readphy(bp, MII_BMCR, &bmcr);
1776 b44_readphy(bp, MII_BMCR, &bmcr);
1777 r = -EINVAL;
1778 if (bmcr & BMCR_ANENABLE) {
1779 b44_writephy(bp, MII_BMCR,
1780 bmcr | BMCR_ANRESTART);
1781 r = 0;
1782 }
1783 spin_unlock_irq(&bp->lock);
1784
1785 return r;
1786 }
1787
1788 static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1789 {
1790 struct b44 *bp = netdev_priv(dev);
1791
1792 cmd->supported = (SUPPORTED_Autoneg);
1793 cmd->supported |= (SUPPORTED_100baseT_Half |
1794 SUPPORTED_100baseT_Full |
1795 SUPPORTED_10baseT_Half |
1796 SUPPORTED_10baseT_Full |
1797 SUPPORTED_MII);
1798
1799 cmd->advertising = 0;
1800 if (bp->flags & B44_FLAG_ADV_10HALF)
1801 cmd->advertising |= ADVERTISED_10baseT_Half;
1802 if (bp->flags & B44_FLAG_ADV_10FULL)
1803 cmd->advertising |= ADVERTISED_10baseT_Full;
1804 if (bp->flags & B44_FLAG_ADV_100HALF)
1805 cmd->advertising |= ADVERTISED_100baseT_Half;
1806 if (bp->flags & B44_FLAG_ADV_100FULL)
1807 cmd->advertising |= ADVERTISED_100baseT_Full;
1808 cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1809 cmd->speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1810 SPEED_100 : SPEED_10;
1811 cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1812 DUPLEX_FULL : DUPLEX_HALF;
1813 cmd->port = 0;
1814 cmd->phy_address = bp->phy_addr;
1815 cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
1816 XCVR_INTERNAL : XCVR_EXTERNAL;
1817 cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1818 AUTONEG_DISABLE : AUTONEG_ENABLE;
1819 if (cmd->autoneg == AUTONEG_ENABLE)
1820 cmd->advertising |= ADVERTISED_Autoneg;
1821 if (!netif_running(dev)){
1822 cmd->speed = 0;
1823 cmd->duplex = 0xff;
1824 }
1825 cmd->maxtxpkt = 0;
1826 cmd->maxrxpkt = 0;
1827 return 0;
1828 }
1829
1830 static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1831 {
1832 struct b44 *bp = netdev_priv(dev);
1833
1834 /* We do not support gigabit. */
1835 if (cmd->autoneg == AUTONEG_ENABLE) {
1836 if (cmd->advertising &
1837 (ADVERTISED_1000baseT_Half |
1838 ADVERTISED_1000baseT_Full))
1839 return -EINVAL;
1840 } else if ((cmd->speed != SPEED_100 &&
1841 cmd->speed != SPEED_10) ||
1842 (cmd->duplex != DUPLEX_HALF &&
1843 cmd->duplex != DUPLEX_FULL)) {
1844 return -EINVAL;
1845 }
1846
1847 spin_lock_irq(&bp->lock);
1848
1849 if (cmd->autoneg == AUTONEG_ENABLE) {
1850 bp->flags &= ~(B44_FLAG_FORCE_LINK |
1851 B44_FLAG_100_BASE_T |
1852 B44_FLAG_FULL_DUPLEX |
1853 B44_FLAG_ADV_10HALF |
1854 B44_FLAG_ADV_10FULL |
1855 B44_FLAG_ADV_100HALF |
1856 B44_FLAG_ADV_100FULL);
1857 if (cmd->advertising == 0) {
1858 bp->flags |= (B44_FLAG_ADV_10HALF |
1859 B44_FLAG_ADV_10FULL |
1860 B44_FLAG_ADV_100HALF |
1861 B44_FLAG_ADV_100FULL);
1862 } else {
1863 if (cmd->advertising & ADVERTISED_10baseT_Half)
1864 bp->flags |= B44_FLAG_ADV_10HALF;
1865 if (cmd->advertising & ADVERTISED_10baseT_Full)
1866 bp->flags |= B44_FLAG_ADV_10FULL;
1867 if (cmd->advertising & ADVERTISED_100baseT_Half)
1868 bp->flags |= B44_FLAG_ADV_100HALF;
1869 if (cmd->advertising & ADVERTISED_100baseT_Full)
1870 bp->flags |= B44_FLAG_ADV_100FULL;
1871 }
1872 } else {
1873 bp->flags |= B44_FLAG_FORCE_LINK;
1874 bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
1875 if (cmd->speed == SPEED_100)
1876 bp->flags |= B44_FLAG_100_BASE_T;
1877 if (cmd->duplex == DUPLEX_FULL)
1878 bp->flags |= B44_FLAG_FULL_DUPLEX;
1879 }
1880
1881 if (netif_running(dev))
1882 b44_setup_phy(bp);
1883
1884 spin_unlock_irq(&bp->lock);
1885
1886 return 0;
1887 }
1888
1889 static void b44_get_ringparam(struct net_device *dev,
1890 struct ethtool_ringparam *ering)
1891 {
1892 struct b44 *bp = netdev_priv(dev);
1893
1894 ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1895 ering->rx_pending = bp->rx_pending;
1896
1897 /* XXX ethtool lacks a tx_max_pending, oops... */
1898 }
1899
1900 static int b44_set_ringparam(struct net_device *dev,
1901 struct ethtool_ringparam *ering)
1902 {
1903 struct b44 *bp = netdev_priv(dev);
1904
1905 if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1906 (ering->rx_mini_pending != 0) ||
1907 (ering->rx_jumbo_pending != 0) ||
1908 (ering->tx_pending > B44_TX_RING_SIZE - 1))
1909 return -EINVAL;
1910
1911 spin_lock_irq(&bp->lock);
1912
1913 bp->rx_pending = ering->rx_pending;
1914 bp->tx_pending = ering->tx_pending;
1915
1916 b44_halt(bp);
1917 b44_init_rings(bp);
1918 b44_init_hw(bp, B44_FULL_RESET);
1919 netif_wake_queue(bp->dev);
1920 spin_unlock_irq(&bp->lock);
1921
1922 b44_enable_ints(bp);
1923
1924 return 0;
1925 }
1926
1927 static void b44_get_pauseparam(struct net_device *dev,
1928 struct ethtool_pauseparam *epause)
1929 {
1930 struct b44 *bp = netdev_priv(dev);
1931
1932 epause->autoneg =
1933 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1934 epause->rx_pause =
1935 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
1936 epause->tx_pause =
1937 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
1938 }
1939
1940 static int b44_set_pauseparam(struct net_device *dev,
1941 struct ethtool_pauseparam *epause)
1942 {
1943 struct b44 *bp = netdev_priv(dev);
1944
1945 spin_lock_irq(&bp->lock);
1946 if (epause->autoneg)
1947 bp->flags |= B44_FLAG_PAUSE_AUTO;
1948 else
1949 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
1950 if (epause->rx_pause)
1951 bp->flags |= B44_FLAG_RX_PAUSE;
1952 else
1953 bp->flags &= ~B44_FLAG_RX_PAUSE;
1954 if (epause->tx_pause)
1955 bp->flags |= B44_FLAG_TX_PAUSE;
1956 else
1957 bp->flags &= ~B44_FLAG_TX_PAUSE;
1958 if (bp->flags & B44_FLAG_PAUSE_AUTO) {
1959 b44_halt(bp);
1960 b44_init_rings(bp);
1961 b44_init_hw(bp, B44_FULL_RESET);
1962 } else {
1963 __b44_set_flow_ctrl(bp, bp->flags);
1964 }
1965 spin_unlock_irq(&bp->lock);
1966
1967 b44_enable_ints(bp);
1968
1969 return 0;
1970 }
1971
1972 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1973 {
1974 switch(stringset) {
1975 case ETH_SS_STATS:
1976 memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
1977 break;
1978 }
1979 }
1980
1981 static int b44_get_sset_count(struct net_device *dev, int sset)
1982 {
1983 switch (sset) {
1984 case ETH_SS_STATS:
1985 return ARRAY_SIZE(b44_gstrings);
1986 default:
1987 return -EOPNOTSUPP;
1988 }
1989 }
1990
1991 static void b44_get_ethtool_stats(struct net_device *dev,
1992 struct ethtool_stats *stats, u64 *data)
1993 {
1994 struct b44 *bp = netdev_priv(dev);
1995 u32 *val = &bp->hw_stats.tx_good_octets;
1996 u32 i;
1997
1998 spin_lock_irq(&bp->lock);
1999
2000 b44_stats_update(bp);
2001
2002 for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
2003 *data++ = *val++;
2004
2005 spin_unlock_irq(&bp->lock);
2006 }
2007
2008 static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2009 {
2010 struct b44 *bp = netdev_priv(dev);
2011
2012 wol->supported = WAKE_MAGIC;
2013 if (bp->flags & B44_FLAG_WOL_ENABLE)
2014 wol->wolopts = WAKE_MAGIC;
2015 else
2016 wol->wolopts = 0;
2017 memset(&wol->sopass, 0, sizeof(wol->sopass));
2018 }
2019
2020 static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2021 {
2022 struct b44 *bp = netdev_priv(dev);
2023
2024 spin_lock_irq(&bp->lock);
2025 if (wol->wolopts & WAKE_MAGIC)
2026 bp->flags |= B44_FLAG_WOL_ENABLE;
2027 else
2028 bp->flags &= ~B44_FLAG_WOL_ENABLE;
2029 spin_unlock_irq(&bp->lock);
2030
2031 return 0;
2032 }
2033
2034 static const struct ethtool_ops b44_ethtool_ops = {
2035 .get_drvinfo = b44_get_drvinfo,
2036 .get_settings = b44_get_settings,
2037 .set_settings = b44_set_settings,
2038 .nway_reset = b44_nway_reset,
2039 .get_link = ethtool_op_get_link,
2040 .get_wol = b44_get_wol,
2041 .set_wol = b44_set_wol,
2042 .get_ringparam = b44_get_ringparam,
2043 .set_ringparam = b44_set_ringparam,
2044 .get_pauseparam = b44_get_pauseparam,
2045 .set_pauseparam = b44_set_pauseparam,
2046 .get_msglevel = b44_get_msglevel,
2047 .set_msglevel = b44_set_msglevel,
2048 .get_strings = b44_get_strings,
2049 .get_sset_count = b44_get_sset_count,
2050 .get_ethtool_stats = b44_get_ethtool_stats,
2051 };
2052
2053 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2054 {
2055 struct mii_ioctl_data *data = if_mii(ifr);
2056 struct b44 *bp = netdev_priv(dev);
2057 int err = -EINVAL;
2058
2059 if (!netif_running(dev))
2060 goto out;
2061
2062 spin_lock_irq(&bp->lock);
2063 err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
2064 spin_unlock_irq(&bp->lock);
2065 out:
2066 return err;
2067 }
2068
2069 static int __devinit b44_get_invariants(struct b44 *bp)
2070 {
2071 struct ssb_device *sdev = bp->sdev;
2072 int err = 0;
2073 u8 *addr;
2074
2075 bp->dma_offset = ssb_dma_translation(sdev);
2076
2077 if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
2078 instance > 1) {
2079 addr = sdev->bus->sprom.et1mac;
2080 bp->phy_addr = sdev->bus->sprom.et1phyaddr;
2081 } else {
2082 addr = sdev->bus->sprom.et0mac;
2083 bp->phy_addr = sdev->bus->sprom.et0phyaddr;
2084 }
2085 /* Some ROMs have buggy PHY addresses with the high
2086 * bits set (sign extension?). Truncate them to a
2087 * valid PHY address. */
2088 bp->phy_addr &= 0x1F;
2089
2090 memcpy(bp->dev->dev_addr, addr, 6);
2091
2092 if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
2093 printk(KERN_ERR PFX "Invalid MAC address found in EEPROM\n");
2094 return -EINVAL;
2095 }
2096
2097 memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
2098
2099 bp->imask = IMASK_DEF;
2100
2101 /* XXX - really required?
2102 bp->flags |= B44_FLAG_BUGGY_TXPTR;
2103 */
2104
2105 if (bp->sdev->id.revision >= 7)
2106 bp->flags |= B44_FLAG_B0_ANDLATER;
2107
2108 return err;
2109 }
2110
2111 static const struct net_device_ops b44_netdev_ops = {
2112 .ndo_open = b44_open,
2113 .ndo_stop = b44_close,
2114 .ndo_start_xmit = b44_start_xmit,
2115 .ndo_get_stats = b44_get_stats,
2116 .ndo_set_multicast_list = b44_set_rx_mode,
2117 .ndo_set_mac_address = b44_set_mac_addr,
2118 .ndo_validate_addr = eth_validate_addr,
2119 .ndo_do_ioctl = b44_ioctl,
2120 .ndo_tx_timeout = b44_tx_timeout,
2121 .ndo_change_mtu = b44_change_mtu,
2122 #ifdef CONFIG_NET_POLL_CONTROLLER
2123 .ndo_poll_controller = b44_poll_controller,
2124 #endif
2125 };
2126
2127 static int __devinit b44_init_one(struct ssb_device *sdev,
2128 const struct ssb_device_id *ent)
2129 {
2130 static int b44_version_printed = 0;
2131 struct net_device *dev;
2132 struct b44 *bp;
2133 int err;
2134
2135 instance++;
2136
2137 if (b44_version_printed++ == 0)
2138 printk(KERN_INFO "%s", version);
2139
2140
2141 dev = alloc_etherdev(sizeof(*bp));
2142 if (!dev) {
2143 dev_err(sdev->dev, "Etherdev alloc failed, aborting.\n");
2144 err = -ENOMEM;
2145 goto out;
2146 }
2147
2148 SET_NETDEV_DEV(dev, sdev->dev);
2149
2150 /* No interesting netdevice features in this card... */
2151 dev->features |= 0;
2152
2153 bp = netdev_priv(dev);
2154 bp->sdev = sdev;
2155 bp->dev = dev;
2156 bp->force_copybreak = 0;
2157
2158 bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
2159
2160 spin_lock_init(&bp->lock);
2161
2162 bp->rx_pending = B44_DEF_RX_RING_PENDING;
2163 bp->tx_pending = B44_DEF_TX_RING_PENDING;
2164
2165 dev->netdev_ops = &b44_netdev_ops;
2166 netif_napi_add(dev, &bp->napi, b44_poll, 64);
2167 dev->watchdog_timeo = B44_TX_TIMEOUT;
2168 dev->irq = sdev->irq;
2169 SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
2170
2171 netif_carrier_off(dev);
2172
2173 err = ssb_bus_powerup(sdev->bus, 0);
2174 if (err) {
2175 dev_err(sdev->dev,
2176 "Failed to powerup the bus\n");
2177 goto err_out_free_dev;
2178 }
2179 err = ssb_dma_set_mask(sdev, DMA_30BIT_MASK);
2180 if (err) {
2181 dev_err(sdev->dev,
2182 "Required 30BIT DMA mask unsupported by the system.\n");
2183 goto err_out_powerdown;
2184 }
2185 err = b44_get_invariants(bp);
2186 if (err) {
2187 dev_err(sdev->dev,
2188 "Problem fetching invariants of chip, aborting.\n");
2189 goto err_out_powerdown;
2190 }
2191
2192 bp->mii_if.dev = dev;
2193 bp->mii_if.mdio_read = b44_mii_read;
2194 bp->mii_if.mdio_write = b44_mii_write;
2195 bp->mii_if.phy_id = bp->phy_addr;
2196 bp->mii_if.phy_id_mask = 0x1f;
2197 bp->mii_if.reg_num_mask = 0x1f;
2198
2199 /* By default, advertise all speed/duplex settings. */
2200 bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2201 B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2202
2203 /* By default, auto-negotiate PAUSE. */
2204 bp->flags |= B44_FLAG_PAUSE_AUTO;
2205
2206 err = register_netdev(dev);
2207 if (err) {
2208 dev_err(sdev->dev, "Cannot register net device, aborting.\n");
2209 goto err_out_powerdown;
2210 }
2211
2212 ssb_set_drvdata(sdev, dev);
2213
2214 /* Chip reset provides power to the b44 MAC & PCI cores, which
2215 * is necessary for MAC register access.
2216 */
2217 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
2218
2219 printk(KERN_INFO "%s: Broadcom 44xx/47xx 10/100BaseT Ethernet %pM\n",
2220 dev->name, dev->dev_addr);
2221
2222 return 0;
2223
2224 err_out_powerdown:
2225 ssb_bus_may_powerdown(sdev->bus);
2226
2227 err_out_free_dev:
2228 free_netdev(dev);
2229
2230 out:
2231 return err;
2232 }
2233
2234 static void __devexit b44_remove_one(struct ssb_device *sdev)
2235 {
2236 struct net_device *dev = ssb_get_drvdata(sdev);
2237
2238 unregister_netdev(dev);
2239 ssb_bus_may_powerdown(sdev->bus);
2240 free_netdev(dev);
2241 ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2242 ssb_set_drvdata(sdev, NULL);
2243 }
2244
2245 static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
2246 {
2247 struct net_device *dev = ssb_get_drvdata(sdev);
2248 struct b44 *bp = netdev_priv(dev);
2249
2250 if (!netif_running(dev))
2251 return 0;
2252
2253 del_timer_sync(&bp->timer);
2254
2255 spin_lock_irq(&bp->lock);
2256
2257 b44_halt(bp);
2258 netif_carrier_off(bp->dev);
2259 netif_device_detach(bp->dev);
2260 b44_free_rings(bp);
2261
2262 spin_unlock_irq(&bp->lock);
2263
2264 free_irq(dev->irq, dev);
2265 if (bp->flags & B44_FLAG_WOL_ENABLE) {
2266 b44_init_hw(bp, B44_PARTIAL_RESET);
2267 b44_setup_wol(bp);
2268 }
2269
2270 ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2271 return 0;
2272 }
2273
2274 static int b44_resume(struct ssb_device *sdev)
2275 {
2276 struct net_device *dev = ssb_get_drvdata(sdev);
2277 struct b44 *bp = netdev_priv(dev);
2278 int rc = 0;
2279
2280 rc = ssb_bus_powerup(sdev->bus, 0);
2281 if (rc) {
2282 dev_err(sdev->dev,
2283 "Failed to powerup the bus\n");
2284 return rc;
2285 }
2286
2287 if (!netif_running(dev))
2288 return 0;
2289
2290 rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
2291 if (rc) {
2292 printk(KERN_ERR PFX "%s: request_irq failed\n", dev->name);
2293 return rc;
2294 }
2295
2296 spin_lock_irq(&bp->lock);
2297
2298 b44_init_rings(bp);
2299 b44_init_hw(bp, B44_FULL_RESET);
2300 netif_device_attach(bp->dev);
2301 spin_unlock_irq(&bp->lock);
2302
2303 b44_enable_ints(bp);
2304 netif_wake_queue(dev);
2305
2306 mod_timer(&bp->timer, jiffies + 1);
2307
2308 return 0;
2309 }
2310
2311 static struct ssb_driver b44_ssb_driver = {
2312 .name = DRV_MODULE_NAME,
2313 .id_table = b44_ssb_tbl,
2314 .probe = b44_init_one,
2315 .remove = __devexit_p(b44_remove_one),
2316 .suspend = b44_suspend,
2317 .resume = b44_resume,
2318 };
2319
2320 static inline int b44_pci_init(void)
2321 {
2322 int err = 0;
2323 #ifdef CONFIG_B44_PCI
2324 err = ssb_pcihost_register(&b44_pci_driver);
2325 #endif
2326 return err;
2327 }
2328
2329 static inline void b44_pci_exit(void)
2330 {
2331 #ifdef CONFIG_B44_PCI
2332 ssb_pcihost_unregister(&b44_pci_driver);
2333 #endif
2334 }
2335
2336 static int __init b44_init(void)
2337 {
2338 unsigned int dma_desc_align_size = dma_get_cache_alignment();
2339 int err;
2340
2341 /* Setup paramaters for syncing RX/TX DMA descriptors */
2342 dma_desc_align_mask = ~(dma_desc_align_size - 1);
2343 dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2344
2345 err = b44_pci_init();
2346 if (err)
2347 return err;
2348 err = ssb_driver_register(&b44_ssb_driver);
2349 if (err)
2350 b44_pci_exit();
2351 return err;
2352 }
2353
2354 static void __exit b44_cleanup(void)
2355 {
2356 ssb_driver_unregister(&b44_ssb_driver);
2357 b44_pci_exit();
2358 }
2359
2360 module_init(b44_init);
2361 module_exit(b44_cleanup);
2362
Support for the Chinese Samsung S3C2440 based development boards