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net: use netdev_mc_count and netdev_mc_empty when appropriate
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / b44.c
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 DEFINE_PCI_DEVICE_TABLE(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_BIT_MASK(30)) {
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_BIT_MASK(30)) {
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, dest_map->mapping,
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->dev->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 unsigned long flags;
851
852 spin_lock_irqsave(&bp->lock, flags);
853
854 if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
855 /* spin_lock(&bp->tx_lock); */
856 b44_tx(bp);
857 /* spin_unlock(&bp->tx_lock); */
858 }
859 spin_unlock_irqrestore(&bp->lock, flags);
860
861 work_done = 0;
862 if (bp->istat & ISTAT_RX)
863 work_done += b44_rx(bp, budget);
864
865 if (bp->istat & ISTAT_ERRORS) {
866 spin_lock_irqsave(&bp->lock, flags);
867 b44_halt(bp);
868 b44_init_rings(bp);
869 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
870 netif_wake_queue(bp->dev);
871 spin_unlock_irqrestore(&bp->lock, flags);
872 work_done = 0;
873 }
874
875 if (work_done < budget) {
876 napi_complete(napi);
877 b44_enable_ints(bp);
878 }
879
880 return work_done;
881 }
882
883 static irqreturn_t b44_interrupt(int irq, void *dev_id)
884 {
885 struct net_device *dev = dev_id;
886 struct b44 *bp = netdev_priv(dev);
887 u32 istat, imask;
888 int handled = 0;
889
890 spin_lock(&bp->lock);
891
892 istat = br32(bp, B44_ISTAT);
893 imask = br32(bp, B44_IMASK);
894
895 /* The interrupt mask register controls which interrupt bits
896 * will actually raise an interrupt to the CPU when set by hw/firmware,
897 * but doesn't mask off the bits.
898 */
899 istat &= imask;
900 if (istat) {
901 handled = 1;
902
903 if (unlikely(!netif_running(dev))) {
904 printk(KERN_INFO "%s: late interrupt.\n", dev->name);
905 goto irq_ack;
906 }
907
908 if (napi_schedule_prep(&bp->napi)) {
909 /* NOTE: These writes are posted by the readback of
910 * the ISTAT register below.
911 */
912 bp->istat = istat;
913 __b44_disable_ints(bp);
914 __napi_schedule(&bp->napi);
915 }
916
917 irq_ack:
918 bw32(bp, B44_ISTAT, istat);
919 br32(bp, B44_ISTAT);
920 }
921 spin_unlock(&bp->lock);
922 return IRQ_RETVAL(handled);
923 }
924
925 static void b44_tx_timeout(struct net_device *dev)
926 {
927 struct b44 *bp = netdev_priv(dev);
928
929 printk(KERN_ERR PFX "%s: transmit timed out, resetting\n",
930 dev->name);
931
932 spin_lock_irq(&bp->lock);
933
934 b44_halt(bp);
935 b44_init_rings(bp);
936 b44_init_hw(bp, B44_FULL_RESET);
937
938 spin_unlock_irq(&bp->lock);
939
940 b44_enable_ints(bp);
941
942 netif_wake_queue(dev);
943 }
944
945 static netdev_tx_t b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
946 {
947 struct b44 *bp = netdev_priv(dev);
948 int rc = NETDEV_TX_OK;
949 dma_addr_t mapping;
950 u32 len, entry, ctrl;
951 unsigned long flags;
952
953 len = skb->len;
954 spin_lock_irqsave(&bp->lock, flags);
955
956 /* This is a hard error, log it. */
957 if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
958 netif_stop_queue(dev);
959 printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
960 dev->name);
961 goto err_out;
962 }
963
964 mapping = ssb_dma_map_single(bp->sdev, skb->data, len, DMA_TO_DEVICE);
965 if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
966 struct sk_buff *bounce_skb;
967
968 /* Chip can't handle DMA to/from >1GB, use bounce buffer */
969 if (!ssb_dma_mapping_error(bp->sdev, mapping))
970 ssb_dma_unmap_single(bp->sdev, mapping, len,
971 DMA_TO_DEVICE);
972
973 bounce_skb = __netdev_alloc_skb(dev, len, GFP_ATOMIC | GFP_DMA);
974 if (!bounce_skb)
975 goto err_out;
976
977 mapping = ssb_dma_map_single(bp->sdev, bounce_skb->data,
978 len, DMA_TO_DEVICE);
979 if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
980 if (!ssb_dma_mapping_error(bp->sdev, mapping))
981 ssb_dma_unmap_single(bp->sdev, mapping,
982 len, DMA_TO_DEVICE);
983 dev_kfree_skb_any(bounce_skb);
984 goto err_out;
985 }
986
987 skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
988 dev_kfree_skb_any(skb);
989 skb = bounce_skb;
990 }
991
992 entry = bp->tx_prod;
993 bp->tx_buffers[entry].skb = skb;
994 bp->tx_buffers[entry].mapping = mapping;
995
996 ctrl = (len & DESC_CTRL_LEN);
997 ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
998 if (entry == (B44_TX_RING_SIZE - 1))
999 ctrl |= DESC_CTRL_EOT;
1000
1001 bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1002 bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1003
1004 if (bp->flags & B44_FLAG_TX_RING_HACK)
1005 b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
1006 entry * sizeof(bp->tx_ring[0]),
1007 DMA_TO_DEVICE);
1008
1009 entry = NEXT_TX(entry);
1010
1011 bp->tx_prod = entry;
1012
1013 wmb();
1014
1015 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1016 if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1017 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1018 if (bp->flags & B44_FLAG_REORDER_BUG)
1019 br32(bp, B44_DMATX_PTR);
1020
1021 if (TX_BUFFS_AVAIL(bp) < 1)
1022 netif_stop_queue(dev);
1023
1024 dev->trans_start = jiffies;
1025
1026 out_unlock:
1027 spin_unlock_irqrestore(&bp->lock, flags);
1028
1029 return rc;
1030
1031 err_out:
1032 rc = NETDEV_TX_BUSY;
1033 goto out_unlock;
1034 }
1035
1036 static int b44_change_mtu(struct net_device *dev, int new_mtu)
1037 {
1038 struct b44 *bp = netdev_priv(dev);
1039
1040 if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
1041 return -EINVAL;
1042
1043 if (!netif_running(dev)) {
1044 /* We'll just catch it later when the
1045 * device is up'd.
1046 */
1047 dev->mtu = new_mtu;
1048 return 0;
1049 }
1050
1051 spin_lock_irq(&bp->lock);
1052 b44_halt(bp);
1053 dev->mtu = new_mtu;
1054 b44_init_rings(bp);
1055 b44_init_hw(bp, B44_FULL_RESET);
1056 spin_unlock_irq(&bp->lock);
1057
1058 b44_enable_ints(bp);
1059
1060 return 0;
1061 }
1062
1063 /* Free up pending packets in all rx/tx rings.
1064 *
1065 * The chip has been shut down and the driver detached from
1066 * the networking, so no interrupts or new tx packets will
1067 * end up in the driver. bp->lock is not held and we are not
1068 * in an interrupt context and thus may sleep.
1069 */
1070 static void b44_free_rings(struct b44 *bp)
1071 {
1072 struct ring_info *rp;
1073 int i;
1074
1075 for (i = 0; i < B44_RX_RING_SIZE; i++) {
1076 rp = &bp->rx_buffers[i];
1077
1078 if (rp->skb == NULL)
1079 continue;
1080 ssb_dma_unmap_single(bp->sdev, rp->mapping, RX_PKT_BUF_SZ,
1081 DMA_FROM_DEVICE);
1082 dev_kfree_skb_any(rp->skb);
1083 rp->skb = NULL;
1084 }
1085
1086 /* XXX needs changes once NETIF_F_SG is set... */
1087 for (i = 0; i < B44_TX_RING_SIZE; i++) {
1088 rp = &bp->tx_buffers[i];
1089
1090 if (rp->skb == NULL)
1091 continue;
1092 ssb_dma_unmap_single(bp->sdev, rp->mapping, rp->skb->len,
1093 DMA_TO_DEVICE);
1094 dev_kfree_skb_any(rp->skb);
1095 rp->skb = NULL;
1096 }
1097 }
1098
1099 /* Initialize tx/rx rings for packet processing.
1100 *
1101 * The chip has been shut down and the driver detached from
1102 * the networking, so no interrupts or new tx packets will
1103 * end up in the driver.
1104 */
1105 static void b44_init_rings(struct b44 *bp)
1106 {
1107 int i;
1108
1109 b44_free_rings(bp);
1110
1111 memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1112 memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1113
1114 if (bp->flags & B44_FLAG_RX_RING_HACK)
1115 ssb_dma_sync_single_for_device(bp->sdev, bp->rx_ring_dma,
1116 DMA_TABLE_BYTES,
1117 DMA_BIDIRECTIONAL);
1118
1119 if (bp->flags & B44_FLAG_TX_RING_HACK)
1120 ssb_dma_sync_single_for_device(bp->sdev, bp->tx_ring_dma,
1121 DMA_TABLE_BYTES,
1122 DMA_TO_DEVICE);
1123
1124 for (i = 0; i < bp->rx_pending; i++) {
1125 if (b44_alloc_rx_skb(bp, -1, i) < 0)
1126 break;
1127 }
1128 }
1129
1130 /*
1131 * Must not be invoked with interrupt sources disabled and
1132 * the hardware shutdown down.
1133 */
1134 static void b44_free_consistent(struct b44 *bp)
1135 {
1136 kfree(bp->rx_buffers);
1137 bp->rx_buffers = NULL;
1138 kfree(bp->tx_buffers);
1139 bp->tx_buffers = NULL;
1140 if (bp->rx_ring) {
1141 if (bp->flags & B44_FLAG_RX_RING_HACK) {
1142 ssb_dma_unmap_single(bp->sdev, bp->rx_ring_dma,
1143 DMA_TABLE_BYTES,
1144 DMA_BIDIRECTIONAL);
1145 kfree(bp->rx_ring);
1146 } else
1147 ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
1148 bp->rx_ring, bp->rx_ring_dma,
1149 GFP_KERNEL);
1150 bp->rx_ring = NULL;
1151 bp->flags &= ~B44_FLAG_RX_RING_HACK;
1152 }
1153 if (bp->tx_ring) {
1154 if (bp->flags & B44_FLAG_TX_RING_HACK) {
1155 ssb_dma_unmap_single(bp->sdev, bp->tx_ring_dma,
1156 DMA_TABLE_BYTES,
1157 DMA_TO_DEVICE);
1158 kfree(bp->tx_ring);
1159 } else
1160 ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
1161 bp->tx_ring, bp->tx_ring_dma,
1162 GFP_KERNEL);
1163 bp->tx_ring = NULL;
1164 bp->flags &= ~B44_FLAG_TX_RING_HACK;
1165 }
1166 }
1167
1168 /*
1169 * Must not be invoked with interrupt sources disabled and
1170 * the hardware shutdown down. Can sleep.
1171 */
1172 static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
1173 {
1174 int size;
1175
1176 size = B44_RX_RING_SIZE * sizeof(struct ring_info);
1177 bp->rx_buffers = kzalloc(size, gfp);
1178 if (!bp->rx_buffers)
1179 goto out_err;
1180
1181 size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1182 bp->tx_buffers = kzalloc(size, gfp);
1183 if (!bp->tx_buffers)
1184 goto out_err;
1185
1186 size = DMA_TABLE_BYTES;
1187 bp->rx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->rx_ring_dma, gfp);
1188 if (!bp->rx_ring) {
1189 /* Allocation may have failed due to pci_alloc_consistent
1190 insisting on use of GFP_DMA, which is more restrictive
1191 than necessary... */
1192 struct dma_desc *rx_ring;
1193 dma_addr_t rx_ring_dma;
1194
1195 rx_ring = kzalloc(size, gfp);
1196 if (!rx_ring)
1197 goto out_err;
1198
1199 rx_ring_dma = ssb_dma_map_single(bp->sdev, rx_ring,
1200 DMA_TABLE_BYTES,
1201 DMA_BIDIRECTIONAL);
1202
1203 if (ssb_dma_mapping_error(bp->sdev, rx_ring_dma) ||
1204 rx_ring_dma + size > DMA_BIT_MASK(30)) {
1205 kfree(rx_ring);
1206 goto out_err;
1207 }
1208
1209 bp->rx_ring = rx_ring;
1210 bp->rx_ring_dma = rx_ring_dma;
1211 bp->flags |= B44_FLAG_RX_RING_HACK;
1212 }
1213
1214 bp->tx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->tx_ring_dma, gfp);
1215 if (!bp->tx_ring) {
1216 /* Allocation may have failed due to ssb_dma_alloc_consistent
1217 insisting on use of GFP_DMA, which is more restrictive
1218 than necessary... */
1219 struct dma_desc *tx_ring;
1220 dma_addr_t tx_ring_dma;
1221
1222 tx_ring = kzalloc(size, gfp);
1223 if (!tx_ring)
1224 goto out_err;
1225
1226 tx_ring_dma = ssb_dma_map_single(bp->sdev, tx_ring,
1227 DMA_TABLE_BYTES,
1228 DMA_TO_DEVICE);
1229
1230 if (ssb_dma_mapping_error(bp->sdev, tx_ring_dma) ||
1231 tx_ring_dma + size > DMA_BIT_MASK(30)) {
1232 kfree(tx_ring);
1233 goto out_err;
1234 }
1235
1236 bp->tx_ring = tx_ring;
1237 bp->tx_ring_dma = tx_ring_dma;
1238 bp->flags |= B44_FLAG_TX_RING_HACK;
1239 }
1240
1241 return 0;
1242
1243 out_err:
1244 b44_free_consistent(bp);
1245 return -ENOMEM;
1246 }
1247
1248 /* bp->lock is held. */
1249 static void b44_clear_stats(struct b44 *bp)
1250 {
1251 unsigned long reg;
1252
1253 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1254 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1255 br32(bp, reg);
1256 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1257 br32(bp, reg);
1258 }
1259
1260 /* bp->lock is held. */
1261 static void b44_chip_reset(struct b44 *bp, int reset_kind)
1262 {
1263 struct ssb_device *sdev = bp->sdev;
1264 bool was_enabled;
1265
1266 was_enabled = ssb_device_is_enabled(bp->sdev);
1267
1268 ssb_device_enable(bp->sdev, 0);
1269 ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
1270
1271 if (was_enabled) {
1272 bw32(bp, B44_RCV_LAZY, 0);
1273 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1274 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1);
1275 bw32(bp, B44_DMATX_CTRL, 0);
1276 bp->tx_prod = bp->tx_cons = 0;
1277 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1278 b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1279 100, 0);
1280 }
1281 bw32(bp, B44_DMARX_CTRL, 0);
1282 bp->rx_prod = bp->rx_cons = 0;
1283 }
1284
1285 b44_clear_stats(bp);
1286
1287 /*
1288 * Don't enable PHY if we are doing a partial reset
1289 * we are probably going to power down
1290 */
1291 if (reset_kind == B44_CHIP_RESET_PARTIAL)
1292 return;
1293
1294 switch (sdev->bus->bustype) {
1295 case SSB_BUSTYPE_SSB:
1296 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1297 (DIV_ROUND_CLOSEST(ssb_clockspeed(sdev->bus),
1298 B44_MDC_RATIO)
1299 & MDIO_CTRL_MAXF_MASK)));
1300 break;
1301 case SSB_BUSTYPE_PCI:
1302 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1303 (0x0d & MDIO_CTRL_MAXF_MASK)));
1304 break;
1305 case SSB_BUSTYPE_PCMCIA:
1306 case SSB_BUSTYPE_SDIO:
1307 WARN_ON(1); /* A device with this bus does not exist. */
1308 break;
1309 }
1310
1311 br32(bp, B44_MDIO_CTRL);
1312
1313 if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1314 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1315 br32(bp, B44_ENET_CTRL);
1316 bp->flags &= ~B44_FLAG_INTERNAL_PHY;
1317 } else {
1318 u32 val = br32(bp, B44_DEVCTRL);
1319
1320 if (val & DEVCTRL_EPR) {
1321 bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1322 br32(bp, B44_DEVCTRL);
1323 udelay(100);
1324 }
1325 bp->flags |= B44_FLAG_INTERNAL_PHY;
1326 }
1327 }
1328
1329 /* bp->lock is held. */
1330 static void b44_halt(struct b44 *bp)
1331 {
1332 b44_disable_ints(bp);
1333 /* reset PHY */
1334 b44_phy_reset(bp);
1335 /* power down PHY */
1336 printk(KERN_INFO PFX "%s: powering down PHY\n", bp->dev->name);
1337 bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
1338 /* now reset the chip, but without enabling the MAC&PHY
1339 * part of it. This has to be done _after_ we shut down the PHY */
1340 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1341 }
1342
1343 /* bp->lock is held. */
1344 static void __b44_set_mac_addr(struct b44 *bp)
1345 {
1346 bw32(bp, B44_CAM_CTRL, 0);
1347 if (!(bp->dev->flags & IFF_PROMISC)) {
1348 u32 val;
1349
1350 __b44_cam_write(bp, bp->dev->dev_addr, 0);
1351 val = br32(bp, B44_CAM_CTRL);
1352 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1353 }
1354 }
1355
1356 static int b44_set_mac_addr(struct net_device *dev, void *p)
1357 {
1358 struct b44 *bp = netdev_priv(dev);
1359 struct sockaddr *addr = p;
1360 u32 val;
1361
1362 if (netif_running(dev))
1363 return -EBUSY;
1364
1365 if (!is_valid_ether_addr(addr->sa_data))
1366 return -EINVAL;
1367
1368 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1369
1370 spin_lock_irq(&bp->lock);
1371
1372 val = br32(bp, B44_RXCONFIG);
1373 if (!(val & RXCONFIG_CAM_ABSENT))
1374 __b44_set_mac_addr(bp);
1375
1376 spin_unlock_irq(&bp->lock);
1377
1378 return 0;
1379 }
1380
1381 /* Called at device open time to get the chip ready for
1382 * packet processing. Invoked with bp->lock held.
1383 */
1384 static void __b44_set_rx_mode(struct net_device *);
1385 static void b44_init_hw(struct b44 *bp, int reset_kind)
1386 {
1387 u32 val;
1388
1389 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
1390 if (reset_kind == B44_FULL_RESET) {
1391 b44_phy_reset(bp);
1392 b44_setup_phy(bp);
1393 }
1394
1395 /* Enable CRC32, set proper LED modes and power on PHY */
1396 bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
1397 bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
1398
1399 /* This sets the MAC address too. */
1400 __b44_set_rx_mode(bp->dev);
1401
1402 /* MTU + eth header + possible VLAN tag + struct rx_header */
1403 bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1404 bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1405
1406 bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
1407 if (reset_kind == B44_PARTIAL_RESET) {
1408 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1409 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1410 } else {
1411 bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
1412 bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
1413 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1414 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1415 bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
1416
1417 bw32(bp, B44_DMARX_PTR, bp->rx_pending);
1418 bp->rx_prod = bp->rx_pending;
1419
1420 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1421 }
1422
1423 val = br32(bp, B44_ENET_CTRL);
1424 bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
1425 }
1426
1427 static int b44_open(struct net_device *dev)
1428 {
1429 struct b44 *bp = netdev_priv(dev);
1430 int err;
1431
1432 err = b44_alloc_consistent(bp, GFP_KERNEL);
1433 if (err)
1434 goto out;
1435
1436 napi_enable(&bp->napi);
1437
1438 b44_init_rings(bp);
1439 b44_init_hw(bp, B44_FULL_RESET);
1440
1441 b44_check_phy(bp);
1442
1443 err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
1444 if (unlikely(err < 0)) {
1445 napi_disable(&bp->napi);
1446 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1447 b44_free_rings(bp);
1448 b44_free_consistent(bp);
1449 goto out;
1450 }
1451
1452 init_timer(&bp->timer);
1453 bp->timer.expires = jiffies + HZ;
1454 bp->timer.data = (unsigned long) bp;
1455 bp->timer.function = b44_timer;
1456 add_timer(&bp->timer);
1457
1458 b44_enable_ints(bp);
1459 netif_start_queue(dev);
1460 out:
1461 return err;
1462 }
1463
1464 #ifdef CONFIG_NET_POLL_CONTROLLER
1465 /*
1466 * Polling receive - used by netconsole and other diagnostic tools
1467 * to allow network i/o with interrupts disabled.
1468 */
1469 static void b44_poll_controller(struct net_device *dev)
1470 {
1471 disable_irq(dev->irq);
1472 b44_interrupt(dev->irq, dev);
1473 enable_irq(dev->irq);
1474 }
1475 #endif
1476
1477 static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
1478 {
1479 u32 i;
1480 u32 *pattern = (u32 *) pp;
1481
1482 for (i = 0; i < bytes; i += sizeof(u32)) {
1483 bw32(bp, B44_FILT_ADDR, table_offset + i);
1484 bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
1485 }
1486 }
1487
1488 static int b44_magic_pattern(u8 *macaddr, u8 *ppattern, u8 *pmask, int offset)
1489 {
1490 int magicsync = 6;
1491 int k, j, len = offset;
1492 int ethaddr_bytes = ETH_ALEN;
1493
1494 memset(ppattern + offset, 0xff, magicsync);
1495 for (j = 0; j < magicsync; j++)
1496 set_bit(len++, (unsigned long *) pmask);
1497
1498 for (j = 0; j < B44_MAX_PATTERNS; j++) {
1499 if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
1500 ethaddr_bytes = ETH_ALEN;
1501 else
1502 ethaddr_bytes = B44_PATTERN_SIZE - len;
1503 if (ethaddr_bytes <=0)
1504 break;
1505 for (k = 0; k< ethaddr_bytes; k++) {
1506 ppattern[offset + magicsync +
1507 (j * ETH_ALEN) + k] = macaddr[k];
1508 set_bit(len++, (unsigned long *) pmask);
1509 }
1510 }
1511 return len - 1;
1512 }
1513
1514 /* Setup magic packet patterns in the b44 WOL
1515 * pattern matching filter.
1516 */
1517 static void b44_setup_pseudo_magicp(struct b44 *bp)
1518 {
1519
1520 u32 val;
1521 int plen0, plen1, plen2;
1522 u8 *pwol_pattern;
1523 u8 pwol_mask[B44_PMASK_SIZE];
1524
1525 pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
1526 if (!pwol_pattern) {
1527 printk(KERN_ERR PFX "Memory not available for WOL\n");
1528 return;
1529 }
1530
1531 /* Ipv4 magic packet pattern - pattern 0.*/
1532 memset(pwol_mask, 0, B44_PMASK_SIZE);
1533 plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1534 B44_ETHIPV4UDP_HLEN);
1535
1536 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
1537 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
1538
1539 /* Raw ethernet II magic packet pattern - pattern 1 */
1540 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1541 memset(pwol_mask, 0, B44_PMASK_SIZE);
1542 plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1543 ETH_HLEN);
1544
1545 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1546 B44_PATTERN_BASE + B44_PATTERN_SIZE);
1547 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1548 B44_PMASK_BASE + B44_PMASK_SIZE);
1549
1550 /* Ipv6 magic packet pattern - pattern 2 */
1551 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1552 memset(pwol_mask, 0, B44_PMASK_SIZE);
1553 plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1554 B44_ETHIPV6UDP_HLEN);
1555
1556 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1557 B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
1558 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1559 B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
1560
1561 kfree(pwol_pattern);
1562
1563 /* set these pattern's lengths: one less than each real length */
1564 val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
1565 bw32(bp, B44_WKUP_LEN, val);
1566
1567 /* enable wakeup pattern matching */
1568 val = br32(bp, B44_DEVCTRL);
1569 bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
1570
1571 }
1572
1573 #ifdef CONFIG_B44_PCI
1574 static void b44_setup_wol_pci(struct b44 *bp)
1575 {
1576 u16 val;
1577
1578 if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
1579 bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
1580 pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
1581 pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
1582 }
1583 }
1584 #else
1585 static inline void b44_setup_wol_pci(struct b44 *bp) { }
1586 #endif /* CONFIG_B44_PCI */
1587
1588 static void b44_setup_wol(struct b44 *bp)
1589 {
1590 u32 val;
1591
1592 bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
1593
1594 if (bp->flags & B44_FLAG_B0_ANDLATER) {
1595
1596 bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
1597
1598 val = bp->dev->dev_addr[2] << 24 |
1599 bp->dev->dev_addr[3] << 16 |
1600 bp->dev->dev_addr[4] << 8 |
1601 bp->dev->dev_addr[5];
1602 bw32(bp, B44_ADDR_LO, val);
1603
1604 val = bp->dev->dev_addr[0] << 8 |
1605 bp->dev->dev_addr[1];
1606 bw32(bp, B44_ADDR_HI, val);
1607
1608 val = br32(bp, B44_DEVCTRL);
1609 bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
1610
1611 } else {
1612 b44_setup_pseudo_magicp(bp);
1613 }
1614 b44_setup_wol_pci(bp);
1615 }
1616
1617 static int b44_close(struct net_device *dev)
1618 {
1619 struct b44 *bp = netdev_priv(dev);
1620
1621 netif_stop_queue(dev);
1622
1623 napi_disable(&bp->napi);
1624
1625 del_timer_sync(&bp->timer);
1626
1627 spin_lock_irq(&bp->lock);
1628
1629 b44_halt(bp);
1630 b44_free_rings(bp);
1631 netif_carrier_off(dev);
1632
1633 spin_unlock_irq(&bp->lock);
1634
1635 free_irq(dev->irq, dev);
1636
1637 if (bp->flags & B44_FLAG_WOL_ENABLE) {
1638 b44_init_hw(bp, B44_PARTIAL_RESET);
1639 b44_setup_wol(bp);
1640 }
1641
1642 b44_free_consistent(bp);
1643
1644 return 0;
1645 }
1646
1647 static struct net_device_stats *b44_get_stats(struct net_device *dev)
1648 {
1649 struct b44 *bp = netdev_priv(dev);
1650 struct net_device_stats *nstat = &dev->stats;
1651 struct b44_hw_stats *hwstat = &bp->hw_stats;
1652
1653 /* Convert HW stats into netdevice stats. */
1654 nstat->rx_packets = hwstat->rx_pkts;
1655 nstat->tx_packets = hwstat->tx_pkts;
1656 nstat->rx_bytes = hwstat->rx_octets;
1657 nstat->tx_bytes = hwstat->tx_octets;
1658 nstat->tx_errors = (hwstat->tx_jabber_pkts +
1659 hwstat->tx_oversize_pkts +
1660 hwstat->tx_underruns +
1661 hwstat->tx_excessive_cols +
1662 hwstat->tx_late_cols);
1663 nstat->multicast = hwstat->tx_multicast_pkts;
1664 nstat->collisions = hwstat->tx_total_cols;
1665
1666 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1667 hwstat->rx_undersize);
1668 nstat->rx_over_errors = hwstat->rx_missed_pkts;
1669 nstat->rx_frame_errors = hwstat->rx_align_errs;
1670 nstat->rx_crc_errors = hwstat->rx_crc_errs;
1671 nstat->rx_errors = (hwstat->rx_jabber_pkts +
1672 hwstat->rx_oversize_pkts +
1673 hwstat->rx_missed_pkts +
1674 hwstat->rx_crc_align_errs +
1675 hwstat->rx_undersize +
1676 hwstat->rx_crc_errs +
1677 hwstat->rx_align_errs +
1678 hwstat->rx_symbol_errs);
1679
1680 nstat->tx_aborted_errors = hwstat->tx_underruns;
1681 #if 0
1682 /* Carrier lost counter seems to be broken for some devices */
1683 nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1684 #endif
1685
1686 return nstat;
1687 }
1688
1689 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1690 {
1691 struct dev_mc_list *mclist;
1692 int i, num_ents;
1693
1694 num_ents = min_t(int, netdev_mc_count(dev), B44_MCAST_TABLE_SIZE);
1695 mclist = dev->mc_list;
1696 for (i = 0; mclist && i < num_ents; i++, mclist = mclist->next) {
1697 __b44_cam_write(bp, mclist->dmi_addr, i + 1);
1698 }
1699 return i+1;
1700 }
1701
1702 static void __b44_set_rx_mode(struct net_device *dev)
1703 {
1704 struct b44 *bp = netdev_priv(dev);
1705 u32 val;
1706
1707 val = br32(bp, B44_RXCONFIG);
1708 val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1709 if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
1710 val |= RXCONFIG_PROMISC;
1711 bw32(bp, B44_RXCONFIG, val);
1712 } else {
1713 unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
1714 int i = 1;
1715
1716 __b44_set_mac_addr(bp);
1717
1718 if ((dev->flags & IFF_ALLMULTI) ||
1719 (netdev_mc_count(dev) > B44_MCAST_TABLE_SIZE))
1720 val |= RXCONFIG_ALLMULTI;
1721 else
1722 i = __b44_load_mcast(bp, dev);
1723
1724 for (; i < 64; i++)
1725 __b44_cam_write(bp, zero, i);
1726
1727 bw32(bp, B44_RXCONFIG, val);
1728 val = br32(bp, B44_CAM_CTRL);
1729 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1730 }
1731 }
1732
1733 static void b44_set_rx_mode(struct net_device *dev)
1734 {
1735 struct b44 *bp = netdev_priv(dev);
1736
1737 spin_lock_irq(&bp->lock);
1738 __b44_set_rx_mode(dev);
1739 spin_unlock_irq(&bp->lock);
1740 }
1741
1742 static u32 b44_get_msglevel(struct net_device *dev)
1743 {
1744 struct b44 *bp = netdev_priv(dev);
1745 return bp->msg_enable;
1746 }
1747
1748 static void b44_set_msglevel(struct net_device *dev, u32 value)
1749 {
1750 struct b44 *bp = netdev_priv(dev);
1751 bp->msg_enable = value;
1752 }
1753
1754 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1755 {
1756 struct b44 *bp = netdev_priv(dev);
1757 struct ssb_bus *bus = bp->sdev->bus;
1758
1759 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
1760 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
1761 switch (bus->bustype) {
1762 case SSB_BUSTYPE_PCI:
1763 strlcpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
1764 break;
1765 case SSB_BUSTYPE_SSB:
1766 strlcpy(info->bus_info, "SSB", sizeof(info->bus_info));
1767 break;
1768 case SSB_BUSTYPE_PCMCIA:
1769 case SSB_BUSTYPE_SDIO:
1770 WARN_ON(1); /* A device with this bus does not exist. */
1771 break;
1772 }
1773 }
1774
1775 static int b44_nway_reset(struct net_device *dev)
1776 {
1777 struct b44 *bp = netdev_priv(dev);
1778 u32 bmcr;
1779 int r;
1780
1781 spin_lock_irq(&bp->lock);
1782 b44_readphy(bp, MII_BMCR, &bmcr);
1783 b44_readphy(bp, MII_BMCR, &bmcr);
1784 r = -EINVAL;
1785 if (bmcr & BMCR_ANENABLE) {
1786 b44_writephy(bp, MII_BMCR,
1787 bmcr | BMCR_ANRESTART);
1788 r = 0;
1789 }
1790 spin_unlock_irq(&bp->lock);
1791
1792 return r;
1793 }
1794
1795 static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1796 {
1797 struct b44 *bp = netdev_priv(dev);
1798
1799 cmd->supported = (SUPPORTED_Autoneg);
1800 cmd->supported |= (SUPPORTED_100baseT_Half |
1801 SUPPORTED_100baseT_Full |
1802 SUPPORTED_10baseT_Half |
1803 SUPPORTED_10baseT_Full |
1804 SUPPORTED_MII);
1805
1806 cmd->advertising = 0;
1807 if (bp->flags & B44_FLAG_ADV_10HALF)
1808 cmd->advertising |= ADVERTISED_10baseT_Half;
1809 if (bp->flags & B44_FLAG_ADV_10FULL)
1810 cmd->advertising |= ADVERTISED_10baseT_Full;
1811 if (bp->flags & B44_FLAG_ADV_100HALF)
1812 cmd->advertising |= ADVERTISED_100baseT_Half;
1813 if (bp->flags & B44_FLAG_ADV_100FULL)
1814 cmd->advertising |= ADVERTISED_100baseT_Full;
1815 cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1816 cmd->speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1817 SPEED_100 : SPEED_10;
1818 cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1819 DUPLEX_FULL : DUPLEX_HALF;
1820 cmd->port = 0;
1821 cmd->phy_address = bp->phy_addr;
1822 cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
1823 XCVR_INTERNAL : XCVR_EXTERNAL;
1824 cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1825 AUTONEG_DISABLE : AUTONEG_ENABLE;
1826 if (cmd->autoneg == AUTONEG_ENABLE)
1827 cmd->advertising |= ADVERTISED_Autoneg;
1828 if (!netif_running(dev)){
1829 cmd->speed = 0;
1830 cmd->duplex = 0xff;
1831 }
1832 cmd->maxtxpkt = 0;
1833 cmd->maxrxpkt = 0;
1834 return 0;
1835 }
1836
1837 static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1838 {
1839 struct b44 *bp = netdev_priv(dev);
1840
1841 /* We do not support gigabit. */
1842 if (cmd->autoneg == AUTONEG_ENABLE) {
1843 if (cmd->advertising &
1844 (ADVERTISED_1000baseT_Half |
1845 ADVERTISED_1000baseT_Full))
1846 return -EINVAL;
1847 } else if ((cmd->speed != SPEED_100 &&
1848 cmd->speed != SPEED_10) ||
1849 (cmd->duplex != DUPLEX_HALF &&
1850 cmd->duplex != DUPLEX_FULL)) {
1851 return -EINVAL;
1852 }
1853
1854 spin_lock_irq(&bp->lock);
1855
1856 if (cmd->autoneg == AUTONEG_ENABLE) {
1857 bp->flags &= ~(B44_FLAG_FORCE_LINK |
1858 B44_FLAG_100_BASE_T |
1859 B44_FLAG_FULL_DUPLEX |
1860 B44_FLAG_ADV_10HALF |
1861 B44_FLAG_ADV_10FULL |
1862 B44_FLAG_ADV_100HALF |
1863 B44_FLAG_ADV_100FULL);
1864 if (cmd->advertising == 0) {
1865 bp->flags |= (B44_FLAG_ADV_10HALF |
1866 B44_FLAG_ADV_10FULL |
1867 B44_FLAG_ADV_100HALF |
1868 B44_FLAG_ADV_100FULL);
1869 } else {
1870 if (cmd->advertising & ADVERTISED_10baseT_Half)
1871 bp->flags |= B44_FLAG_ADV_10HALF;
1872 if (cmd->advertising & ADVERTISED_10baseT_Full)
1873 bp->flags |= B44_FLAG_ADV_10FULL;
1874 if (cmd->advertising & ADVERTISED_100baseT_Half)
1875 bp->flags |= B44_FLAG_ADV_100HALF;
1876 if (cmd->advertising & ADVERTISED_100baseT_Full)
1877 bp->flags |= B44_FLAG_ADV_100FULL;
1878 }
1879 } else {
1880 bp->flags |= B44_FLAG_FORCE_LINK;
1881 bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
1882 if (cmd->speed == SPEED_100)
1883 bp->flags |= B44_FLAG_100_BASE_T;
1884 if (cmd->duplex == DUPLEX_FULL)
1885 bp->flags |= B44_FLAG_FULL_DUPLEX;
1886 }
1887
1888 if (netif_running(dev))
1889 b44_setup_phy(bp);
1890
1891 spin_unlock_irq(&bp->lock);
1892
1893 return 0;
1894 }
1895
1896 static void b44_get_ringparam(struct net_device *dev,
1897 struct ethtool_ringparam *ering)
1898 {
1899 struct b44 *bp = netdev_priv(dev);
1900
1901 ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1902 ering->rx_pending = bp->rx_pending;
1903
1904 /* XXX ethtool lacks a tx_max_pending, oops... */
1905 }
1906
1907 static int b44_set_ringparam(struct net_device *dev,
1908 struct ethtool_ringparam *ering)
1909 {
1910 struct b44 *bp = netdev_priv(dev);
1911
1912 if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1913 (ering->rx_mini_pending != 0) ||
1914 (ering->rx_jumbo_pending != 0) ||
1915 (ering->tx_pending > B44_TX_RING_SIZE - 1))
1916 return -EINVAL;
1917
1918 spin_lock_irq(&bp->lock);
1919
1920 bp->rx_pending = ering->rx_pending;
1921 bp->tx_pending = ering->tx_pending;
1922
1923 b44_halt(bp);
1924 b44_init_rings(bp);
1925 b44_init_hw(bp, B44_FULL_RESET);
1926 netif_wake_queue(bp->dev);
1927 spin_unlock_irq(&bp->lock);
1928
1929 b44_enable_ints(bp);
1930
1931 return 0;
1932 }
1933
1934 static void b44_get_pauseparam(struct net_device *dev,
1935 struct ethtool_pauseparam *epause)
1936 {
1937 struct b44 *bp = netdev_priv(dev);
1938
1939 epause->autoneg =
1940 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1941 epause->rx_pause =
1942 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
1943 epause->tx_pause =
1944 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
1945 }
1946
1947 static int b44_set_pauseparam(struct net_device *dev,
1948 struct ethtool_pauseparam *epause)
1949 {
1950 struct b44 *bp = netdev_priv(dev);
1951
1952 spin_lock_irq(&bp->lock);
1953 if (epause->autoneg)
1954 bp->flags |= B44_FLAG_PAUSE_AUTO;
1955 else
1956 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
1957 if (epause->rx_pause)
1958 bp->flags |= B44_FLAG_RX_PAUSE;
1959 else
1960 bp->flags &= ~B44_FLAG_RX_PAUSE;
1961 if (epause->tx_pause)
1962 bp->flags |= B44_FLAG_TX_PAUSE;
1963 else
1964 bp->flags &= ~B44_FLAG_TX_PAUSE;
1965 if (bp->flags & B44_FLAG_PAUSE_AUTO) {
1966 b44_halt(bp);
1967 b44_init_rings(bp);
1968 b44_init_hw(bp, B44_FULL_RESET);
1969 } else {
1970 __b44_set_flow_ctrl(bp, bp->flags);
1971 }
1972 spin_unlock_irq(&bp->lock);
1973
1974 b44_enable_ints(bp);
1975
1976 return 0;
1977 }
1978
1979 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1980 {
1981 switch(stringset) {
1982 case ETH_SS_STATS:
1983 memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
1984 break;
1985 }
1986 }
1987
1988 static int b44_get_sset_count(struct net_device *dev, int sset)
1989 {
1990 switch (sset) {
1991 case ETH_SS_STATS:
1992 return ARRAY_SIZE(b44_gstrings);
1993 default:
1994 return -EOPNOTSUPP;
1995 }
1996 }
1997
1998 static void b44_get_ethtool_stats(struct net_device *dev,
1999 struct ethtool_stats *stats, u64 *data)
2000 {
2001 struct b44 *bp = netdev_priv(dev);
2002 u32 *val = &bp->hw_stats.tx_good_octets;
2003 u32 i;
2004
2005 spin_lock_irq(&bp->lock);
2006
2007 b44_stats_update(bp);
2008
2009 for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
2010 *data++ = *val++;
2011
2012 spin_unlock_irq(&bp->lock);
2013 }
2014
2015 static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2016 {
2017 struct b44 *bp = netdev_priv(dev);
2018
2019 wol->supported = WAKE_MAGIC;
2020 if (bp->flags & B44_FLAG_WOL_ENABLE)
2021 wol->wolopts = WAKE_MAGIC;
2022 else
2023 wol->wolopts = 0;
2024 memset(&wol->sopass, 0, sizeof(wol->sopass));
2025 }
2026
2027 static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2028 {
2029 struct b44 *bp = netdev_priv(dev);
2030
2031 spin_lock_irq(&bp->lock);
2032 if (wol->wolopts & WAKE_MAGIC)
2033 bp->flags |= B44_FLAG_WOL_ENABLE;
2034 else
2035 bp->flags &= ~B44_FLAG_WOL_ENABLE;
2036 spin_unlock_irq(&bp->lock);
2037
2038 return 0;
2039 }
2040
2041 static const struct ethtool_ops b44_ethtool_ops = {
2042 .get_drvinfo = b44_get_drvinfo,
2043 .get_settings = b44_get_settings,
2044 .set_settings = b44_set_settings,
2045 .nway_reset = b44_nway_reset,
2046 .get_link = ethtool_op_get_link,
2047 .get_wol = b44_get_wol,
2048 .set_wol = b44_set_wol,
2049 .get_ringparam = b44_get_ringparam,
2050 .set_ringparam = b44_set_ringparam,
2051 .get_pauseparam = b44_get_pauseparam,
2052 .set_pauseparam = b44_set_pauseparam,
2053 .get_msglevel = b44_get_msglevel,
2054 .set_msglevel = b44_set_msglevel,
2055 .get_strings = b44_get_strings,
2056 .get_sset_count = b44_get_sset_count,
2057 .get_ethtool_stats = b44_get_ethtool_stats,
2058 };
2059
2060 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2061 {
2062 struct mii_ioctl_data *data = if_mii(ifr);
2063 struct b44 *bp = netdev_priv(dev);
2064 int err = -EINVAL;
2065
2066 if (!netif_running(dev))
2067 goto out;
2068
2069 spin_lock_irq(&bp->lock);
2070 err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
2071 spin_unlock_irq(&bp->lock);
2072 out:
2073 return err;
2074 }
2075
2076 static int __devinit b44_get_invariants(struct b44 *bp)
2077 {
2078 struct ssb_device *sdev = bp->sdev;
2079 int err = 0;
2080 u8 *addr;
2081
2082 bp->dma_offset = ssb_dma_translation(sdev);
2083
2084 if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
2085 instance > 1) {
2086 addr = sdev->bus->sprom.et1mac;
2087 bp->phy_addr = sdev->bus->sprom.et1phyaddr;
2088 } else {
2089 addr = sdev->bus->sprom.et0mac;
2090 bp->phy_addr = sdev->bus->sprom.et0phyaddr;
2091 }
2092 /* Some ROMs have buggy PHY addresses with the high
2093 * bits set (sign extension?). Truncate them to a
2094 * valid PHY address. */
2095 bp->phy_addr &= 0x1F;
2096
2097 memcpy(bp->dev->dev_addr, addr, 6);
2098
2099 if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
2100 printk(KERN_ERR PFX "Invalid MAC address found in EEPROM\n");
2101 return -EINVAL;
2102 }
2103
2104 memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
2105
2106 bp->imask = IMASK_DEF;
2107
2108 /* XXX - really required?
2109 bp->flags |= B44_FLAG_BUGGY_TXPTR;
2110 */
2111
2112 if (bp->sdev->id.revision >= 7)
2113 bp->flags |= B44_FLAG_B0_ANDLATER;
2114
2115 return err;
2116 }
2117
2118 static const struct net_device_ops b44_netdev_ops = {
2119 .ndo_open = b44_open,
2120 .ndo_stop = b44_close,
2121 .ndo_start_xmit = b44_start_xmit,
2122 .ndo_get_stats = b44_get_stats,
2123 .ndo_set_multicast_list = b44_set_rx_mode,
2124 .ndo_set_mac_address = b44_set_mac_addr,
2125 .ndo_validate_addr = eth_validate_addr,
2126 .ndo_do_ioctl = b44_ioctl,
2127 .ndo_tx_timeout = b44_tx_timeout,
2128 .ndo_change_mtu = b44_change_mtu,
2129 #ifdef CONFIG_NET_POLL_CONTROLLER
2130 .ndo_poll_controller = b44_poll_controller,
2131 #endif
2132 };
2133
2134 static int __devinit b44_init_one(struct ssb_device *sdev,
2135 const struct ssb_device_id *ent)
2136 {
2137 static int b44_version_printed = 0;
2138 struct net_device *dev;
2139 struct b44 *bp;
2140 int err;
2141
2142 instance++;
2143
2144 if (b44_version_printed++ == 0)
2145 printk(KERN_INFO "%s", version);
2146
2147
2148 dev = alloc_etherdev(sizeof(*bp));
2149 if (!dev) {
2150 dev_err(sdev->dev, "Etherdev alloc failed, aborting.\n");
2151 err = -ENOMEM;
2152 goto out;
2153 }
2154
2155 SET_NETDEV_DEV(dev, sdev->dev);
2156
2157 /* No interesting netdevice features in this card... */
2158 dev->features |= 0;
2159
2160 bp = netdev_priv(dev);
2161 bp->sdev = sdev;
2162 bp->dev = dev;
2163 bp->force_copybreak = 0;
2164
2165 bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
2166
2167 spin_lock_init(&bp->lock);
2168
2169 bp->rx_pending = B44_DEF_RX_RING_PENDING;
2170 bp->tx_pending = B44_DEF_TX_RING_PENDING;
2171
2172 dev->netdev_ops = &b44_netdev_ops;
2173 netif_napi_add(dev, &bp->napi, b44_poll, 64);
2174 dev->watchdog_timeo = B44_TX_TIMEOUT;
2175 dev->irq = sdev->irq;
2176 SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
2177
2178 netif_carrier_off(dev);
2179
2180 err = ssb_bus_powerup(sdev->bus, 0);
2181 if (err) {
2182 dev_err(sdev->dev,
2183 "Failed to powerup the bus\n");
2184 goto err_out_free_dev;
2185 }
2186 err = ssb_dma_set_mask(sdev, DMA_BIT_MASK(30));
2187 if (err) {
2188 dev_err(sdev->dev,
2189 "Required 30BIT DMA mask unsupported by the system.\n");
2190 goto err_out_powerdown;
2191 }
2192 err = b44_get_invariants(bp);
2193 if (err) {
2194 dev_err(sdev->dev,
2195 "Problem fetching invariants of chip, aborting.\n");
2196 goto err_out_powerdown;
2197 }
2198
2199 bp->mii_if.dev = dev;
2200 bp->mii_if.mdio_read = b44_mii_read;
2201 bp->mii_if.mdio_write = b44_mii_write;
2202 bp->mii_if.phy_id = bp->phy_addr;
2203 bp->mii_if.phy_id_mask = 0x1f;
2204 bp->mii_if.reg_num_mask = 0x1f;
2205
2206 /* By default, advertise all speed/duplex settings. */
2207 bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2208 B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2209
2210 /* By default, auto-negotiate PAUSE. */
2211 bp->flags |= B44_FLAG_PAUSE_AUTO;
2212
2213 err = register_netdev(dev);
2214 if (err) {
2215 dev_err(sdev->dev, "Cannot register net device, aborting.\n");
2216 goto err_out_powerdown;
2217 }
2218
2219 ssb_set_drvdata(sdev, dev);
2220
2221 /* Chip reset provides power to the b44 MAC & PCI cores, which
2222 * is necessary for MAC register access.
2223 */
2224 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
2225
2226 printk(KERN_INFO "%s: Broadcom 44xx/47xx 10/100BaseT Ethernet %pM\n",
2227 dev->name, dev->dev_addr);
2228
2229 return 0;
2230
2231 err_out_powerdown:
2232 ssb_bus_may_powerdown(sdev->bus);
2233
2234 err_out_free_dev:
2235 free_netdev(dev);
2236
2237 out:
2238 return err;
2239 }
2240
2241 static void __devexit b44_remove_one(struct ssb_device *sdev)
2242 {
2243 struct net_device *dev = ssb_get_drvdata(sdev);
2244
2245 unregister_netdev(dev);
2246 ssb_device_disable(sdev, 0);
2247 ssb_bus_may_powerdown(sdev->bus);
2248 free_netdev(dev);
2249 ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2250 ssb_set_drvdata(sdev, NULL);
2251 }
2252
2253 static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
2254 {
2255 struct net_device *dev = ssb_get_drvdata(sdev);
2256 struct b44 *bp = netdev_priv(dev);
2257
2258 if (!netif_running(dev))
2259 return 0;
2260
2261 del_timer_sync(&bp->timer);
2262
2263 spin_lock_irq(&bp->lock);
2264
2265 b44_halt(bp);
2266 netif_carrier_off(bp->dev);
2267 netif_device_detach(bp->dev);
2268 b44_free_rings(bp);
2269
2270 spin_unlock_irq(&bp->lock);
2271
2272 free_irq(dev->irq, dev);
2273 if (bp->flags & B44_FLAG_WOL_ENABLE) {
2274 b44_init_hw(bp, B44_PARTIAL_RESET);
2275 b44_setup_wol(bp);
2276 }
2277
2278 ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2279 return 0;
2280 }
2281
2282 static int b44_resume(struct ssb_device *sdev)
2283 {
2284 struct net_device *dev = ssb_get_drvdata(sdev);
2285 struct b44 *bp = netdev_priv(dev);
2286 int rc = 0;
2287
2288 rc = ssb_bus_powerup(sdev->bus, 0);
2289 if (rc) {
2290 dev_err(sdev->dev,
2291 "Failed to powerup the bus\n");
2292 return rc;
2293 }
2294
2295 if (!netif_running(dev))
2296 return 0;
2297
2298 rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
2299 if (rc) {
2300 printk(KERN_ERR PFX "%s: request_irq failed\n", dev->name);
2301 return rc;
2302 }
2303
2304 spin_lock_irq(&bp->lock);
2305
2306 b44_init_rings(bp);
2307 b44_init_hw(bp, B44_FULL_RESET);
2308 netif_device_attach(bp->dev);
2309 spin_unlock_irq(&bp->lock);
2310
2311 b44_enable_ints(bp);
2312 netif_wake_queue(dev);
2313
2314 mod_timer(&bp->timer, jiffies + 1);
2315
2316 return 0;
2317 }
2318
2319 static struct ssb_driver b44_ssb_driver = {
2320 .name = DRV_MODULE_NAME,
2321 .id_table = b44_ssb_tbl,
2322 .probe = b44_init_one,
2323 .remove = __devexit_p(b44_remove_one),
2324 .suspend = b44_suspend,
2325 .resume = b44_resume,
2326 };
2327
2328 static inline int b44_pci_init(void)
2329 {
2330 int err = 0;
2331 #ifdef CONFIG_B44_PCI
2332 err = ssb_pcihost_register(&b44_pci_driver);
2333 #endif
2334 return err;
2335 }
2336
2337 static inline void b44_pci_exit(void)
2338 {
2339 #ifdef CONFIG_B44_PCI
2340 ssb_pcihost_unregister(&b44_pci_driver);
2341 #endif
2342 }
2343
2344 static int __init b44_init(void)
2345 {
2346 unsigned int dma_desc_align_size = dma_get_cache_alignment();
2347 int err;
2348
2349 /* Setup paramaters for syncing RX/TX DMA descriptors */
2350 dma_desc_align_mask = ~(dma_desc_align_size - 1);
2351 dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2352
2353 err = b44_pci_init();
2354 if (err)
2355 return err;
2356 err = ssb_driver_register(&b44_ssb_driver);
2357 if (err)
2358 b44_pci_exit();
2359 return err;
2360 }
2361
2362 static void __exit b44_cleanup(void)
2363 {
2364 ssb_driver_unregister(&b44_ssb_driver);
2365 b44_pci_exit();
2366 }
2367
2368 module_init(b44_init);
2369 module_exit(b44_cleanup);
2370
kernel source for telekom puls (alcatel/mediatek)