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staging/mei: add mei to staging Kbuild
[zen-stable.git] / drivers / net / bmac.c
bloba1b8c8b8010b006f1781ea87af7a4cc20515198b
1 /*
2 * Network device driver for the BMAC ethernet controller on
3 * Apple Powermacs. Assumes it's under a DBDMA controller.
4 *
5 * Copyright (C) 1998 Randy Gobbel.
6 *
7 * May 1999, Al Viro: proper release of /proc/net/bmac entry, switched to
8 * dynamic procfs inode.
9 */
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/netdevice.h>
13 #include <linux/etherdevice.h>
14 #include <linux/delay.h>
15 #include <linux/string.h>
16 #include <linux/timer.h>
17 #include <linux/proc_fs.h>
18 #include <linux/init.h>
19 #include <linux/spinlock.h>
20 #include <linux/crc32.h>
21 #include <linux/bitrev.h>
22 #include <linux/ethtool.h>
23 #include <linux/slab.h>
24 #include <asm/prom.h>
25 #include <asm/dbdma.h>
26 #include <asm/io.h>
27 #include <asm/page.h>
28 #include <asm/pgtable.h>
29 #include <asm/machdep.h>
30 #include <asm/pmac_feature.h>
31 #include <asm/macio.h>
32 #include <asm/irq.h>
33
34 #include "bmac.h"
35
36 #define trunc_page(x) ((void *)(((unsigned long)(x)) & ~((unsigned long)(PAGE_SIZE - 1))))
37 #define round_page(x) trunc_page(((unsigned long)(x)) + ((unsigned long)(PAGE_SIZE - 1)))
38
39 /*
40 * CRC polynomial - used in working out multicast filter bits.
41 */
42 #define ENET_CRCPOLY 0x04c11db7
43
44 /* switch to use multicast code lifted from sunhme driver */
45 #define SUNHME_MULTICAST
46
47 #define N_RX_RING 64
48 #define N_TX_RING 32
49 #define MAX_TX_ACTIVE 1
50 #define ETHERCRC 4
51 #define ETHERMINPACKET 64
52 #define ETHERMTU 1500
53 #define RX_BUFLEN (ETHERMTU + 14 + ETHERCRC + 2)
54 #define TX_TIMEOUT HZ /* 1 second */
55
56 /* Bits in transmit DMA status */
57 #define TX_DMA_ERR 0x80
58
59 #define XXDEBUG(args)
60
61 struct bmac_data {
62 /* volatile struct bmac *bmac; */
63 struct sk_buff_head *queue;
64 volatile struct dbdma_regs __iomem *tx_dma;
65 int tx_dma_intr;
66 volatile struct dbdma_regs __iomem *rx_dma;
67 int rx_dma_intr;
68 volatile struct dbdma_cmd *tx_cmds; /* xmit dma command list */
69 volatile struct dbdma_cmd *rx_cmds; /* recv dma command list */
70 struct macio_dev *mdev;
71 int is_bmac_plus;
72 struct sk_buff *rx_bufs[N_RX_RING];
73 int rx_fill;
74 int rx_empty;
75 struct sk_buff *tx_bufs[N_TX_RING];
76 int tx_fill;
77 int tx_empty;
78 unsigned char tx_fullup;
79 struct timer_list tx_timeout;
80 int timeout_active;
81 int sleeping;
82 int opened;
83 unsigned short hash_use_count[64];
84 unsigned short hash_table_mask[4];
85 spinlock_t lock;
86 };
87
88 #if 0 /* Move that to ethtool */
89
90 typedef struct bmac_reg_entry {
91 char *name;
92 unsigned short reg_offset;
93 } bmac_reg_entry_t;
94
95 #define N_REG_ENTRIES 31
96
97 static bmac_reg_entry_t reg_entries[N_REG_ENTRIES] = {
98 {"MEMADD", MEMADD},
99 {"MEMDATAHI", MEMDATAHI},
100 {"MEMDATALO", MEMDATALO},
101 {"TXPNTR", TXPNTR},
102 {"RXPNTR", RXPNTR},
103 {"IPG1", IPG1},
104 {"IPG2", IPG2},
105 {"ALIMIT", ALIMIT},
106 {"SLOT", SLOT},
107 {"PALEN", PALEN},
108 {"PAPAT", PAPAT},
109 {"TXSFD", TXSFD},
110 {"JAM", JAM},
111 {"TXCFG", TXCFG},
112 {"TXMAX", TXMAX},
113 {"TXMIN", TXMIN},
114 {"PAREG", PAREG},
115 {"DCNT", DCNT},
116 {"NCCNT", NCCNT},
117 {"NTCNT", NTCNT},
118 {"EXCNT", EXCNT},
119 {"LTCNT", LTCNT},
120 {"TXSM", TXSM},
121 {"RXCFG", RXCFG},
122 {"RXMAX", RXMAX},
123 {"RXMIN", RXMIN},
124 {"FRCNT", FRCNT},
125 {"AECNT", AECNT},
126 {"FECNT", FECNT},
127 {"RXSM", RXSM},
128 {"RXCV", RXCV}
129 };
130
131 #endif
132
133 static unsigned char *bmac_emergency_rxbuf;
134
135 /*
136 * Number of bytes of private data per BMAC: allow enough for
137 * the rx and tx dma commands plus a branch dma command each,
138 * and another 16 bytes to allow us to align the dma command
139 * buffers on a 16 byte boundary.
140 */
141 #define PRIV_BYTES (sizeof(struct bmac_data) \
142 + (N_RX_RING + N_TX_RING + 4) * sizeof(struct dbdma_cmd) \
143 + sizeof(struct sk_buff_head))
144
145 static int bmac_open(struct net_device *dev);
146 static int bmac_close(struct net_device *dev);
147 static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev);
148 static void bmac_set_multicast(struct net_device *dev);
149 static void bmac_reset_and_enable(struct net_device *dev);
150 static void bmac_start_chip(struct net_device *dev);
151 static void bmac_init_chip(struct net_device *dev);
152 static void bmac_init_registers(struct net_device *dev);
153 static void bmac_enable_and_reset_chip(struct net_device *dev);
154 static int bmac_set_address(struct net_device *dev, void *addr);
155 static irqreturn_t bmac_misc_intr(int irq, void *dev_id);
156 static irqreturn_t bmac_txdma_intr(int irq, void *dev_id);
157 static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id);
158 static void bmac_set_timeout(struct net_device *dev);
159 static void bmac_tx_timeout(unsigned long data);
160 static int bmac_output(struct sk_buff *skb, struct net_device *dev);
161 static void bmac_start(struct net_device *dev);
162
163 #define DBDMA_SET(x) ( ((x) | (x) << 16) )
164 #define DBDMA_CLEAR(x) ( (x) << 16)
165
166 static inline void
167 dbdma_st32(volatile __u32 __iomem *a, unsigned long x)
168 {
169 __asm__ volatile( "stwbrx %0,0,%1" : : "r" (x), "r" (a) : "memory");
170 }
171
172 static inline unsigned long
173 dbdma_ld32(volatile __u32 __iomem *a)
174 {
175 __u32 swap;
176 __asm__ volatile ("lwbrx %0,0,%1" : "=r" (swap) : "r" (a));
177 return swap;
178 }
179
180 static void
181 dbdma_continue(volatile struct dbdma_regs __iomem *dmap)
182 {
183 dbdma_st32(&dmap->control,
184 DBDMA_SET(RUN|WAKE) | DBDMA_CLEAR(PAUSE|DEAD));
185 eieio();
186 }
187
188 static void
189 dbdma_reset(volatile struct dbdma_regs __iomem *dmap)
190 {
191 dbdma_st32(&dmap->control,
192 DBDMA_CLEAR(ACTIVE|DEAD|WAKE|FLUSH|PAUSE|RUN));
193 eieio();
194 while (dbdma_ld32(&dmap->status) & RUN)
195 eieio();
196 }
197
198 static void
199 dbdma_setcmd(volatile struct dbdma_cmd *cp,
200 unsigned short cmd, unsigned count, unsigned long addr,
201 unsigned long cmd_dep)
202 {
203 out_le16(&cp->command, cmd);
204 out_le16(&cp->req_count, count);
205 out_le32(&cp->phy_addr, addr);
206 out_le32(&cp->cmd_dep, cmd_dep);
207 out_le16(&cp->xfer_status, 0);
208 out_le16(&cp->res_count, 0);
209 }
210
211 static inline
212 void bmwrite(struct net_device *dev, unsigned long reg_offset, unsigned data )
213 {
214 out_le16((void __iomem *)dev->base_addr + reg_offset, data);
215 }
216
217
218 static inline
219 unsigned short bmread(struct net_device *dev, unsigned long reg_offset )
220 {
221 return in_le16((void __iomem *)dev->base_addr + reg_offset);
222 }
223
224 static void
225 bmac_enable_and_reset_chip(struct net_device *dev)
226 {
227 struct bmac_data *bp = netdev_priv(dev);
228 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
229 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
230
231 if (rd)
232 dbdma_reset(rd);
233 if (td)
234 dbdma_reset(td);
235
236 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 1);
237 }
238
239 #define MIFDELAY udelay(10)
240
241 static unsigned int
242 bmac_mif_readbits(struct net_device *dev, int nb)
243 {
244 unsigned int val = 0;
245
246 while (--nb >= 0) {
247 bmwrite(dev, MIFCSR, 0);
248 MIFDELAY;
249 if (bmread(dev, MIFCSR) & 8)
250 val |= 1 << nb;
251 bmwrite(dev, MIFCSR, 1);
252 MIFDELAY;
253 }
254 bmwrite(dev, MIFCSR, 0);
255 MIFDELAY;
256 bmwrite(dev, MIFCSR, 1);
257 MIFDELAY;
258 return val;
259 }
260
261 static void
262 bmac_mif_writebits(struct net_device *dev, unsigned int val, int nb)
263 {
264 int b;
265
266 while (--nb >= 0) {
267 b = (val & (1 << nb))? 6: 4;
268 bmwrite(dev, MIFCSR, b);
269 MIFDELAY;
270 bmwrite(dev, MIFCSR, b|1);
271 MIFDELAY;
272 }
273 }
274
275 static unsigned int
276 bmac_mif_read(struct net_device *dev, unsigned int addr)
277 {
278 unsigned int val;
279
280 bmwrite(dev, MIFCSR, 4);
281 MIFDELAY;
282 bmac_mif_writebits(dev, ~0U, 32);
283 bmac_mif_writebits(dev, 6, 4);
284 bmac_mif_writebits(dev, addr, 10);
285 bmwrite(dev, MIFCSR, 2);
286 MIFDELAY;
287 bmwrite(dev, MIFCSR, 1);
288 MIFDELAY;
289 val = bmac_mif_readbits(dev, 17);
290 bmwrite(dev, MIFCSR, 4);
291 MIFDELAY;
292 return val;
293 }
294
295 static void
296 bmac_mif_write(struct net_device *dev, unsigned int addr, unsigned int val)
297 {
298 bmwrite(dev, MIFCSR, 4);
299 MIFDELAY;
300 bmac_mif_writebits(dev, ~0U, 32);
301 bmac_mif_writebits(dev, 5, 4);
302 bmac_mif_writebits(dev, addr, 10);
303 bmac_mif_writebits(dev, 2, 2);
304 bmac_mif_writebits(dev, val, 16);
305 bmac_mif_writebits(dev, 3, 2);
306 }
307
308 static void
309 bmac_init_registers(struct net_device *dev)
310 {
311 struct bmac_data *bp = netdev_priv(dev);
312 volatile unsigned short regValue;
313 unsigned short *pWord16;
314 int i;
315
316 /* XXDEBUG(("bmac: enter init_registers\n")); */
317
318 bmwrite(dev, RXRST, RxResetValue);
319 bmwrite(dev, TXRST, TxResetBit);
320
321 i = 100;
322 do {
323 --i;
324 udelay(10000);
325 regValue = bmread(dev, TXRST); /* wait for reset to clear..acknowledge */
326 } while ((regValue & TxResetBit) && i > 0);
327
328 if (!bp->is_bmac_plus) {
329 regValue = bmread(dev, XCVRIF);
330 regValue |= ClkBit | SerialMode | COLActiveLow;
331 bmwrite(dev, XCVRIF, regValue);
332 udelay(10000);
333 }
334
335 bmwrite(dev, RSEED, (unsigned short)0x1968);
336
337 regValue = bmread(dev, XIFC);
338 regValue |= TxOutputEnable;
339 bmwrite(dev, XIFC, regValue);
340
341 bmread(dev, PAREG);
342
343 /* set collision counters to 0 */
344 bmwrite(dev, NCCNT, 0);
345 bmwrite(dev, NTCNT, 0);
346 bmwrite(dev, EXCNT, 0);
347 bmwrite(dev, LTCNT, 0);
348
349 /* set rx counters to 0 */
350 bmwrite(dev, FRCNT, 0);
351 bmwrite(dev, LECNT, 0);
352 bmwrite(dev, AECNT, 0);
353 bmwrite(dev, FECNT, 0);
354 bmwrite(dev, RXCV, 0);
355
356 /* set tx fifo information */
357 bmwrite(dev, TXTH, 4); /* 4 octets before tx starts */
358
359 bmwrite(dev, TXFIFOCSR, 0); /* first disable txFIFO */
360 bmwrite(dev, TXFIFOCSR, TxFIFOEnable );
361
362 /* set rx fifo information */
363 bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */
364 bmwrite(dev, RXFIFOCSR, RxFIFOEnable );
365
366 //bmwrite(dev, TXCFG, TxMACEnable); /* TxNeverGiveUp maybe later */
367 bmread(dev, STATUS); /* read it just to clear it */
368
369 /* zero out the chip Hash Filter registers */
370 for (i=0; i<4; i++) bp->hash_table_mask[i] = 0;
371 bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */
372 bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */
373 bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */
374 bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */
375
376 pWord16 = (unsigned short *)dev->dev_addr;
377 bmwrite(dev, MADD0, *pWord16++);
378 bmwrite(dev, MADD1, *pWord16++);
379 bmwrite(dev, MADD2, *pWord16);
380
381 bmwrite(dev, RXCFG, RxCRCNoStrip | RxHashFilterEnable | RxRejectOwnPackets);
382
383 bmwrite(dev, INTDISABLE, EnableNormal);
384 }
385
386 #if 0
387 static void
388 bmac_disable_interrupts(struct net_device *dev)
389 {
390 bmwrite(dev, INTDISABLE, DisableAll);
391 }
392
393 static void
394 bmac_enable_interrupts(struct net_device *dev)
395 {
396 bmwrite(dev, INTDISABLE, EnableNormal);
397 }
398 #endif
399
400
401 static void
402 bmac_start_chip(struct net_device *dev)
403 {
404 struct bmac_data *bp = netdev_priv(dev);
405 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
406 unsigned short oldConfig;
407
408 /* enable rx dma channel */
409 dbdma_continue(rd);
410
411 oldConfig = bmread(dev, TXCFG);
412 bmwrite(dev, TXCFG, oldConfig | TxMACEnable );
413
414 /* turn on rx plus any other bits already on (promiscuous possibly) */
415 oldConfig = bmread(dev, RXCFG);
416 bmwrite(dev, RXCFG, oldConfig | RxMACEnable );
417 udelay(20000);
418 }
419
420 static void
421 bmac_init_phy(struct net_device *dev)
422 {
423 unsigned int addr;
424 struct bmac_data *bp = netdev_priv(dev);
425
426 printk(KERN_DEBUG "phy registers:");
427 for (addr = 0; addr < 32; ++addr) {
428 if ((addr & 7) == 0)
429 printk(KERN_DEBUG);
430 printk(KERN_CONT " %.4x", bmac_mif_read(dev, addr));
431 }
432 printk(KERN_CONT "\n");
433
434 if (bp->is_bmac_plus) {
435 unsigned int capable, ctrl;
436
437 ctrl = bmac_mif_read(dev, 0);
438 capable = ((bmac_mif_read(dev, 1) & 0xf800) >> 6) | 1;
439 if (bmac_mif_read(dev, 4) != capable ||
440 (ctrl & 0x1000) == 0) {
441 bmac_mif_write(dev, 4, capable);
442 bmac_mif_write(dev, 0, 0x1200);
443 } else
444 bmac_mif_write(dev, 0, 0x1000);
445 }
446 }
447
448 static void bmac_init_chip(struct net_device *dev)
449 {
450 bmac_init_phy(dev);
451 bmac_init_registers(dev);
452 }
453
454 #ifdef CONFIG_PM
455 static int bmac_suspend(struct macio_dev *mdev, pm_message_t state)
456 {
457 struct net_device* dev = macio_get_drvdata(mdev);
458 struct bmac_data *bp = netdev_priv(dev);
459 unsigned long flags;
460 unsigned short config;
461 int i;
462
463 netif_device_detach(dev);
464 /* prolly should wait for dma to finish & turn off the chip */
465 spin_lock_irqsave(&bp->lock, flags);
466 if (bp->timeout_active) {
467 del_timer(&bp->tx_timeout);
468 bp->timeout_active = 0;
469 }
470 disable_irq(dev->irq);
471 disable_irq(bp->tx_dma_intr);
472 disable_irq(bp->rx_dma_intr);
473 bp->sleeping = 1;
474 spin_unlock_irqrestore(&bp->lock, flags);
475 if (bp->opened) {
476 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
477 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
478
479 config = bmread(dev, RXCFG);
480 bmwrite(dev, RXCFG, (config & ~RxMACEnable));
481 config = bmread(dev, TXCFG);
482 bmwrite(dev, TXCFG, (config & ~TxMACEnable));
483 bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */
484 /* disable rx and tx dma */
485 st_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
486 st_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
487 /* free some skb's */
488 for (i=0; i<N_RX_RING; i++) {
489 if (bp->rx_bufs[i] != NULL) {
490 dev_kfree_skb(bp->rx_bufs[i]);
491 bp->rx_bufs[i] = NULL;
492 }
493 }
494 for (i = 0; i<N_TX_RING; i++) {
495 if (bp->tx_bufs[i] != NULL) {
496 dev_kfree_skb(bp->tx_bufs[i]);
497 bp->tx_bufs[i] = NULL;
498 }
499 }
500 }
501 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
502 return 0;
503 }
504
505 static int bmac_resume(struct macio_dev *mdev)
506 {
507 struct net_device* dev = macio_get_drvdata(mdev);
508 struct bmac_data *bp = netdev_priv(dev);
509
510 /* see if this is enough */
511 if (bp->opened)
512 bmac_reset_and_enable(dev);
513
514 enable_irq(dev->irq);
515 enable_irq(bp->tx_dma_intr);
516 enable_irq(bp->rx_dma_intr);
517 netif_device_attach(dev);
518
519 return 0;
520 }
521 #endif /* CONFIG_PM */
522
523 static int bmac_set_address(struct net_device *dev, void *addr)
524 {
525 struct bmac_data *bp = netdev_priv(dev);
526 unsigned char *p = addr;
527 unsigned short *pWord16;
528 unsigned long flags;
529 int i;
530
531 XXDEBUG(("bmac: enter set_address\n"));
532 spin_lock_irqsave(&bp->lock, flags);
533
534 for (i = 0; i < 6; ++i) {
535 dev->dev_addr[i] = p[i];
536 }
537 /* load up the hardware address */
538 pWord16 = (unsigned short *)dev->dev_addr;
539 bmwrite(dev, MADD0, *pWord16++);
540 bmwrite(dev, MADD1, *pWord16++);
541 bmwrite(dev, MADD2, *pWord16);
542
543 spin_unlock_irqrestore(&bp->lock, flags);
544 XXDEBUG(("bmac: exit set_address\n"));
545 return 0;
546 }
547
548 static inline void bmac_set_timeout(struct net_device *dev)
549 {
550 struct bmac_data *bp = netdev_priv(dev);
551 unsigned long flags;
552
553 spin_lock_irqsave(&bp->lock, flags);
554 if (bp->timeout_active)
555 del_timer(&bp->tx_timeout);
556 bp->tx_timeout.expires = jiffies + TX_TIMEOUT;
557 bp->tx_timeout.function = bmac_tx_timeout;
558 bp->tx_timeout.data = (unsigned long) dev;
559 add_timer(&bp->tx_timeout);
560 bp->timeout_active = 1;
561 spin_unlock_irqrestore(&bp->lock, flags);
562 }
563
564 static void
565 bmac_construct_xmt(struct sk_buff *skb, volatile struct dbdma_cmd *cp)
566 {
567 void *vaddr;
568 unsigned long baddr;
569 unsigned long len;
570
571 len = skb->len;
572 vaddr = skb->data;
573 baddr = virt_to_bus(vaddr);
574
575 dbdma_setcmd(cp, (OUTPUT_LAST | INTR_ALWAYS | WAIT_IFCLR), len, baddr, 0);
576 }
577
578 static void
579 bmac_construct_rxbuff(struct sk_buff *skb, volatile struct dbdma_cmd *cp)
580 {
581 unsigned char *addr = skb? skb->data: bmac_emergency_rxbuf;
582
583 dbdma_setcmd(cp, (INPUT_LAST | INTR_ALWAYS), RX_BUFLEN,
584 virt_to_bus(addr), 0);
585 }
586
587 static void
588 bmac_init_tx_ring(struct bmac_data *bp)
589 {
590 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
591
592 memset((char *)bp->tx_cmds, 0, (N_TX_RING+1) * sizeof(struct dbdma_cmd));
593
594 bp->tx_empty = 0;
595 bp->tx_fill = 0;
596 bp->tx_fullup = 0;
597
598 /* put a branch at the end of the tx command list */
599 dbdma_setcmd(&bp->tx_cmds[N_TX_RING],
600 (DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->tx_cmds));
601
602 /* reset tx dma */
603 dbdma_reset(td);
604 out_le32(&td->wait_sel, 0x00200020);
605 out_le32(&td->cmdptr, virt_to_bus(bp->tx_cmds));
606 }
607
608 static int
609 bmac_init_rx_ring(struct bmac_data *bp)
610 {
611 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
612 int i;
613 struct sk_buff *skb;
614
615 /* initialize list of sk_buffs for receiving and set up recv dma */
616 memset((char *)bp->rx_cmds, 0,
617 (N_RX_RING + 1) * sizeof(struct dbdma_cmd));
618 for (i = 0; i < N_RX_RING; i++) {
619 if ((skb = bp->rx_bufs[i]) == NULL) {
620 bp->rx_bufs[i] = skb = dev_alloc_skb(RX_BUFLEN+2);
621 if (skb != NULL)
622 skb_reserve(skb, 2);
623 }
624 bmac_construct_rxbuff(skb, &bp->rx_cmds[i]);
625 }
626
627 bp->rx_empty = 0;
628 bp->rx_fill = i;
629
630 /* Put a branch back to the beginning of the receive command list */
631 dbdma_setcmd(&bp->rx_cmds[N_RX_RING],
632 (DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->rx_cmds));
633
634 /* start rx dma */
635 dbdma_reset(rd);
636 out_le32(&rd->cmdptr, virt_to_bus(bp->rx_cmds));
637
638 return 1;
639 }
640
641
642 static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev)
643 {
644 struct bmac_data *bp = netdev_priv(dev);
645 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
646 int i;
647
648 /* see if there's a free slot in the tx ring */
649 /* XXDEBUG(("bmac_xmit_start: empty=%d fill=%d\n", */
650 /* bp->tx_empty, bp->tx_fill)); */
651 i = bp->tx_fill + 1;
652 if (i >= N_TX_RING)
653 i = 0;
654 if (i == bp->tx_empty) {
655 netif_stop_queue(dev);
656 bp->tx_fullup = 1;
657 XXDEBUG(("bmac_transmit_packet: tx ring full\n"));
658 return -1; /* can't take it at the moment */
659 }
660
661 dbdma_setcmd(&bp->tx_cmds[i], DBDMA_STOP, 0, 0, 0);
662
663 bmac_construct_xmt(skb, &bp->tx_cmds[bp->tx_fill]);
664
665 bp->tx_bufs[bp->tx_fill] = skb;
666 bp->tx_fill = i;
667
668 dev->stats.tx_bytes += skb->len;
669
670 dbdma_continue(td);
671
672 return 0;
673 }
674
675 static int rxintcount;
676
677 static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id)
678 {
679 struct net_device *dev = (struct net_device *) dev_id;
680 struct bmac_data *bp = netdev_priv(dev);
681 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
682 volatile struct dbdma_cmd *cp;
683 int i, nb, stat;
684 struct sk_buff *skb;
685 unsigned int residual;
686 int last;
687 unsigned long flags;
688
689 spin_lock_irqsave(&bp->lock, flags);
690
691 if (++rxintcount < 10) {
692 XXDEBUG(("bmac_rxdma_intr\n"));
693 }
694
695 last = -1;
696 i = bp->rx_empty;
697
698 while (1) {
699 cp = &bp->rx_cmds[i];
700 stat = ld_le16(&cp->xfer_status);
701 residual = ld_le16(&cp->res_count);
702 if ((stat & ACTIVE) == 0)
703 break;
704 nb = RX_BUFLEN - residual - 2;
705 if (nb < (ETHERMINPACKET - ETHERCRC)) {
706 skb = NULL;
707 dev->stats.rx_length_errors++;
708 dev->stats.rx_errors++;
709 } else {
710 skb = bp->rx_bufs[i];
711 bp->rx_bufs[i] = NULL;
712 }
713 if (skb != NULL) {
714 nb -= ETHERCRC;
715 skb_put(skb, nb);
716 skb->protocol = eth_type_trans(skb, dev);
717 netif_rx(skb);
718 ++dev->stats.rx_packets;
719 dev->stats.rx_bytes += nb;
720 } else {
721 ++dev->stats.rx_dropped;
722 }
723 if ((skb = bp->rx_bufs[i]) == NULL) {
724 bp->rx_bufs[i] = skb = dev_alloc_skb(RX_BUFLEN+2);
725 if (skb != NULL)
726 skb_reserve(bp->rx_bufs[i], 2);
727 }
728 bmac_construct_rxbuff(skb, &bp->rx_cmds[i]);
729 st_le16(&cp->res_count, 0);
730 st_le16(&cp->xfer_status, 0);
731 last = i;
732 if (++i >= N_RX_RING) i = 0;
733 }
734
735 if (last != -1) {
736 bp->rx_fill = last;
737 bp->rx_empty = i;
738 }
739
740 dbdma_continue(rd);
741 spin_unlock_irqrestore(&bp->lock, flags);
742
743 if (rxintcount < 10) {
744 XXDEBUG(("bmac_rxdma_intr done\n"));
745 }
746 return IRQ_HANDLED;
747 }
748
749 static int txintcount;
750
751 static irqreturn_t bmac_txdma_intr(int irq, void *dev_id)
752 {
753 struct net_device *dev = (struct net_device *) dev_id;
754 struct bmac_data *bp = netdev_priv(dev);
755 volatile struct dbdma_cmd *cp;
756 int stat;
757 unsigned long flags;
758
759 spin_lock_irqsave(&bp->lock, flags);
760
761 if (txintcount++ < 10) {
762 XXDEBUG(("bmac_txdma_intr\n"));
763 }
764
765 /* del_timer(&bp->tx_timeout); */
766 /* bp->timeout_active = 0; */
767
768 while (1) {
769 cp = &bp->tx_cmds[bp->tx_empty];
770 stat = ld_le16(&cp->xfer_status);
771 if (txintcount < 10) {
772 XXDEBUG(("bmac_txdma_xfer_stat=%#0x\n", stat));
773 }
774 if (!(stat & ACTIVE)) {
775 /*
776 * status field might not have been filled by DBDMA
777 */
778 if (cp == bus_to_virt(in_le32(&bp->tx_dma->cmdptr)))
779 break;
780 }
781
782 if (bp->tx_bufs[bp->tx_empty]) {
783 ++dev->stats.tx_packets;
784 dev_kfree_skb_irq(bp->tx_bufs[bp->tx_empty]);
785 }
786 bp->tx_bufs[bp->tx_empty] = NULL;
787 bp->tx_fullup = 0;
788 netif_wake_queue(dev);
789 if (++bp->tx_empty >= N_TX_RING)
790 bp->tx_empty = 0;
791 if (bp->tx_empty == bp->tx_fill)
792 break;
793 }
794
795 spin_unlock_irqrestore(&bp->lock, flags);
796
797 if (txintcount < 10) {
798 XXDEBUG(("bmac_txdma_intr done->bmac_start\n"));
799 }
800
801 bmac_start(dev);
802 return IRQ_HANDLED;
803 }
804
805 #ifndef SUNHME_MULTICAST
806 /* Real fast bit-reversal algorithm, 6-bit values */
807 static int reverse6[64] = {
808 0x0,0x20,0x10,0x30,0x8,0x28,0x18,0x38,
809 0x4,0x24,0x14,0x34,0xc,0x2c,0x1c,0x3c,
810 0x2,0x22,0x12,0x32,0xa,0x2a,0x1a,0x3a,
811 0x6,0x26,0x16,0x36,0xe,0x2e,0x1e,0x3e,
812 0x1,0x21,0x11,0x31,0x9,0x29,0x19,0x39,
813 0x5,0x25,0x15,0x35,0xd,0x2d,0x1d,0x3d,
814 0x3,0x23,0x13,0x33,0xb,0x2b,0x1b,0x3b,
815 0x7,0x27,0x17,0x37,0xf,0x2f,0x1f,0x3f
816 };
817
818 static unsigned int
819 crc416(unsigned int curval, unsigned short nxtval)
820 {
821 register unsigned int counter, cur = curval, next = nxtval;
822 register int high_crc_set, low_data_set;
823
824 /* Swap bytes */
825 next = ((next & 0x00FF) << 8) | (next >> 8);
826
827 /* Compute bit-by-bit */
828 for (counter = 0; counter < 16; ++counter) {
829 /* is high CRC bit set? */
830 if ((cur & 0x80000000) == 0) high_crc_set = 0;
831 else high_crc_set = 1;
832
833 cur = cur << 1;
834
835 if ((next & 0x0001) == 0) low_data_set = 0;
836 else low_data_set = 1;
837
838 next = next >> 1;
839
840 /* do the XOR */
841 if (high_crc_set ^ low_data_set) cur = cur ^ ENET_CRCPOLY;
842 }
843 return cur;
844 }
845
846 static unsigned int
847 bmac_crc(unsigned short *address)
848 {
849 unsigned int newcrc;
850
851 XXDEBUG(("bmac_crc: addr=%#04x, %#04x, %#04x\n", *address, address[1], address[2]));
852 newcrc = crc416(0xffffffff, *address); /* address bits 47 - 32 */
853 newcrc = crc416(newcrc, address[1]); /* address bits 31 - 16 */
854 newcrc = crc416(newcrc, address[2]); /* address bits 15 - 0 */
855
856 return(newcrc);
857 }
858
859 /*
860 * Add requested mcast addr to BMac's hash table filter.
861 *
862 */
863
864 static void
865 bmac_addhash(struct bmac_data *bp, unsigned char *addr)
866 {
867 unsigned int crc;
868 unsigned short mask;
869
870 if (!(*addr)) return;
871 crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */
872 crc = reverse6[crc]; /* Hyperfast bit-reversing algorithm */
873 if (bp->hash_use_count[crc]++) return; /* This bit is already set */
874 mask = crc % 16;
875 mask = (unsigned char)1 << mask;
876 bp->hash_use_count[crc/16] |= mask;
877 }
878
879 static void
880 bmac_removehash(struct bmac_data *bp, unsigned char *addr)
881 {
882 unsigned int crc;
883 unsigned char mask;
884
885 /* Now, delete the address from the filter copy, as indicated */
886 crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */
887 crc = reverse6[crc]; /* Hyperfast bit-reversing algorithm */
888 if (bp->hash_use_count[crc] == 0) return; /* That bit wasn't in use! */
889 if (--bp->hash_use_count[crc]) return; /* That bit is still in use */
890 mask = crc % 16;
891 mask = ((unsigned char)1 << mask) ^ 0xffff; /* To turn off bit */
892 bp->hash_table_mask[crc/16] &= mask;
893 }
894
895 /*
896 * Sync the adapter with the software copy of the multicast mask
897 * (logical address filter).
898 */
899
900 static void
901 bmac_rx_off(struct net_device *dev)
902 {
903 unsigned short rx_cfg;
904
905 rx_cfg = bmread(dev, RXCFG);
906 rx_cfg &= ~RxMACEnable;
907 bmwrite(dev, RXCFG, rx_cfg);
908 do {
909 rx_cfg = bmread(dev, RXCFG);
910 } while (rx_cfg & RxMACEnable);
911 }
912
913 unsigned short
914 bmac_rx_on(struct net_device *dev, int hash_enable, int promisc_enable)
915 {
916 unsigned short rx_cfg;
917
918 rx_cfg = bmread(dev, RXCFG);
919 rx_cfg |= RxMACEnable;
920 if (hash_enable) rx_cfg |= RxHashFilterEnable;
921 else rx_cfg &= ~RxHashFilterEnable;
922 if (promisc_enable) rx_cfg |= RxPromiscEnable;
923 else rx_cfg &= ~RxPromiscEnable;
924 bmwrite(dev, RXRST, RxResetValue);
925 bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */
926 bmwrite(dev, RXFIFOCSR, RxFIFOEnable );
927 bmwrite(dev, RXCFG, rx_cfg );
928 return rx_cfg;
929 }
930
931 static void
932 bmac_update_hash_table_mask(struct net_device *dev, struct bmac_data *bp)
933 {
934 bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */
935 bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */
936 bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */
937 bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */
938 }
939
940 #if 0
941 static void
942 bmac_add_multi(struct net_device *dev,
943 struct bmac_data *bp, unsigned char *addr)
944 {
945 /* XXDEBUG(("bmac: enter bmac_add_multi\n")); */
946 bmac_addhash(bp, addr);
947 bmac_rx_off(dev);
948 bmac_update_hash_table_mask(dev, bp);
949 bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0);
950 /* XXDEBUG(("bmac: exit bmac_add_multi\n")); */
951 }
952
953 static void
954 bmac_remove_multi(struct net_device *dev,
955 struct bmac_data *bp, unsigned char *addr)
956 {
957 bmac_removehash(bp, addr);
958 bmac_rx_off(dev);
959 bmac_update_hash_table_mask(dev, bp);
960 bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0);
961 }
962 #endif
963
964 /* Set or clear the multicast filter for this adaptor.
965 num_addrs == -1 Promiscuous mode, receive all packets
966 num_addrs == 0 Normal mode, clear multicast list
967 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
968 best-effort filtering.
969 */
970 static void bmac_set_multicast(struct net_device *dev)
971 {
972 struct netdev_hw_addr *ha;
973 struct bmac_data *bp = netdev_priv(dev);
974 int num_addrs = netdev_mc_count(dev);
975 unsigned short rx_cfg;
976 int i;
977
978 if (bp->sleeping)
979 return;
980
981 XXDEBUG(("bmac: enter bmac_set_multicast, n_addrs=%d\n", num_addrs));
982
983 if((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
984 for (i=0; i<4; i++) bp->hash_table_mask[i] = 0xffff;
985 bmac_update_hash_table_mask(dev, bp);
986 rx_cfg = bmac_rx_on(dev, 1, 0);
987 XXDEBUG(("bmac: all multi, rx_cfg=%#08x\n"));
988 } else if ((dev->flags & IFF_PROMISC) || (num_addrs < 0)) {
989 rx_cfg = bmread(dev, RXCFG);
990 rx_cfg |= RxPromiscEnable;
991 bmwrite(dev, RXCFG, rx_cfg);
992 rx_cfg = bmac_rx_on(dev, 0, 1);
993 XXDEBUG(("bmac: promisc mode enabled, rx_cfg=%#08x\n", rx_cfg));
994 } else {
995 for (i=0; i<4; i++) bp->hash_table_mask[i] = 0;
996 for (i=0; i<64; i++) bp->hash_use_count[i] = 0;
997 if (num_addrs == 0) {
998 rx_cfg = bmac_rx_on(dev, 0, 0);
999 XXDEBUG(("bmac: multi disabled, rx_cfg=%#08x\n", rx_cfg));
1000 } else {
1001 netdev_for_each_mc_addr(ha, dev)
1002 bmac_addhash(bp, ha->addr);
1003 bmac_update_hash_table_mask(dev, bp);
1004 rx_cfg = bmac_rx_on(dev, 1, 0);
1005 XXDEBUG(("bmac: multi enabled, rx_cfg=%#08x\n", rx_cfg));
1006 }
1007 }
1008 /* XXDEBUG(("bmac: exit bmac_set_multicast\n")); */
1009 }
1010 #else /* ifdef SUNHME_MULTICAST */
1011
1012 /* The version of set_multicast below was lifted from sunhme.c */
1013
1014 static void bmac_set_multicast(struct net_device *dev)
1015 {
1016 struct netdev_hw_addr *ha;
1017 char *addrs;
1018 int i;
1019 unsigned short rx_cfg;
1020 u32 crc;
1021
1022 if((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
1023 bmwrite(dev, BHASH0, 0xffff);
1024 bmwrite(dev, BHASH1, 0xffff);
1025 bmwrite(dev, BHASH2, 0xffff);
1026 bmwrite(dev, BHASH3, 0xffff);
1027 } else if(dev->flags & IFF_PROMISC) {
1028 rx_cfg = bmread(dev, RXCFG);
1029 rx_cfg |= RxPromiscEnable;
1030 bmwrite(dev, RXCFG, rx_cfg);
1031 } else {
1032 u16 hash_table[4];
1033
1034 rx_cfg = bmread(dev, RXCFG);
1035 rx_cfg &= ~RxPromiscEnable;
1036 bmwrite(dev, RXCFG, rx_cfg);
1037
1038 for(i = 0; i < 4; i++) hash_table[i] = 0;
1039
1040 netdev_for_each_mc_addr(ha, dev) {
1041 addrs = ha->addr;
1042
1043 if(!(*addrs & 1))
1044 continue;
1045
1046 crc = ether_crc_le(6, addrs);
1047 crc >>= 26;
1048 hash_table[crc >> 4] |= 1 << (crc & 0xf);
1049 }
1050 bmwrite(dev, BHASH0, hash_table[0]);
1051 bmwrite(dev, BHASH1, hash_table[1]);
1052 bmwrite(dev, BHASH2, hash_table[2]);
1053 bmwrite(dev, BHASH3, hash_table[3]);
1054 }
1055 }
1056 #endif /* SUNHME_MULTICAST */
1057
1058 static int miscintcount;
1059
1060 static irqreturn_t bmac_misc_intr(int irq, void *dev_id)
1061 {
1062 struct net_device *dev = (struct net_device *) dev_id;
1063 unsigned int status = bmread(dev, STATUS);
1064 if (miscintcount++ < 10) {
1065 XXDEBUG(("bmac_misc_intr\n"));
1066 }
1067 /* XXDEBUG(("bmac_misc_intr, status=%#08x\n", status)); */
1068 /* bmac_txdma_intr_inner(irq, dev_id); */
1069 /* if (status & FrameReceived) dev->stats.rx_dropped++; */
1070 if (status & RxErrorMask) dev->stats.rx_errors++;
1071 if (status & RxCRCCntExp) dev->stats.rx_crc_errors++;
1072 if (status & RxLenCntExp) dev->stats.rx_length_errors++;
1073 if (status & RxOverFlow) dev->stats.rx_over_errors++;
1074 if (status & RxAlignCntExp) dev->stats.rx_frame_errors++;
1075
1076 /* if (status & FrameSent) dev->stats.tx_dropped++; */
1077 if (status & TxErrorMask) dev->stats.tx_errors++;
1078 if (status & TxUnderrun) dev->stats.tx_fifo_errors++;
1079 if (status & TxNormalCollExp) dev->stats.collisions++;
1080 return IRQ_HANDLED;
1081 }
1082
1083 /*
1084 * Procedure for reading EEPROM
1085 */
1086 #define SROMAddressLength 5
1087 #define DataInOn 0x0008
1088 #define DataInOff 0x0000
1089 #define Clk 0x0002
1090 #define ChipSelect 0x0001
1091 #define SDIShiftCount 3
1092 #define SD0ShiftCount 2
1093 #define DelayValue 1000 /* number of microseconds */
1094 #define SROMStartOffset 10 /* this is in words */
1095 #define SROMReadCount 3 /* number of words to read from SROM */
1096 #define SROMAddressBits 6
1097 #define EnetAddressOffset 20
1098
1099 static unsigned char
1100 bmac_clock_out_bit(struct net_device *dev)
1101 {
1102 unsigned short data;
1103 unsigned short val;
1104
1105 bmwrite(dev, SROMCSR, ChipSelect | Clk);
1106 udelay(DelayValue);
1107
1108 data = bmread(dev, SROMCSR);
1109 udelay(DelayValue);
1110 val = (data >> SD0ShiftCount) & 1;
1111
1112 bmwrite(dev, SROMCSR, ChipSelect);
1113 udelay(DelayValue);
1114
1115 return val;
1116 }
1117
1118 static void
1119 bmac_clock_in_bit(struct net_device *dev, unsigned int val)
1120 {
1121 unsigned short data;
1122
1123 if (val != 0 && val != 1) return;
1124
1125 data = (val << SDIShiftCount);
1126 bmwrite(dev, SROMCSR, data | ChipSelect );
1127 udelay(DelayValue);
1128
1129 bmwrite(dev, SROMCSR, data | ChipSelect | Clk );
1130 udelay(DelayValue);
1131
1132 bmwrite(dev, SROMCSR, data | ChipSelect);
1133 udelay(DelayValue);
1134 }
1135
1136 static void
1137 reset_and_select_srom(struct net_device *dev)
1138 {
1139 /* first reset */
1140 bmwrite(dev, SROMCSR, 0);
1141 udelay(DelayValue);
1142
1143 /* send it the read command (110) */
1144 bmac_clock_in_bit(dev, 1);
1145 bmac_clock_in_bit(dev, 1);
1146 bmac_clock_in_bit(dev, 0);
1147 }
1148
1149 static unsigned short
1150 read_srom(struct net_device *dev, unsigned int addr, unsigned int addr_len)
1151 {
1152 unsigned short data, val;
1153 int i;
1154
1155 /* send out the address we want to read from */
1156 for (i = 0; i < addr_len; i++) {
1157 val = addr >> (addr_len-i-1);
1158 bmac_clock_in_bit(dev, val & 1);
1159 }
1160
1161 /* Now read in the 16-bit data */
1162 data = 0;
1163 for (i = 0; i < 16; i++) {
1164 val = bmac_clock_out_bit(dev);
1165 data <<= 1;
1166 data |= val;
1167 }
1168 bmwrite(dev, SROMCSR, 0);
1169
1170 return data;
1171 }
1172
1173 /*
1174 * It looks like Cogent and SMC use different methods for calculating
1175 * checksums. What a pain..
1176 */
1177
1178 static int
1179 bmac_verify_checksum(struct net_device *dev)
1180 {
1181 unsigned short data, storedCS;
1182
1183 reset_and_select_srom(dev);
1184 data = read_srom(dev, 3, SROMAddressBits);
1185 storedCS = ((data >> 8) & 0x0ff) | ((data << 8) & 0xff00);
1186
1187 return 0;
1188 }
1189
1190
1191 static void
1192 bmac_get_station_address(struct net_device *dev, unsigned char *ea)
1193 {
1194 int i;
1195 unsigned short data;
1196
1197 for (i = 0; i < 6; i++)
1198 {
1199 reset_and_select_srom(dev);
1200 data = read_srom(dev, i + EnetAddressOffset/2, SROMAddressBits);
1201 ea[2*i] = bitrev8(data & 0x0ff);
1202 ea[2*i+1] = bitrev8((data >> 8) & 0x0ff);
1203 }
1204 }
1205
1206 static void bmac_reset_and_enable(struct net_device *dev)
1207 {
1208 struct bmac_data *bp = netdev_priv(dev);
1209 unsigned long flags;
1210 struct sk_buff *skb;
1211 unsigned char *data;
1212
1213 spin_lock_irqsave(&bp->lock, flags);
1214 bmac_enable_and_reset_chip(dev);
1215 bmac_init_tx_ring(bp);
1216 bmac_init_rx_ring(bp);
1217 bmac_init_chip(dev);
1218 bmac_start_chip(dev);
1219 bmwrite(dev, INTDISABLE, EnableNormal);
1220 bp->sleeping = 0;
1221
1222 /*
1223 * It seems that the bmac can't receive until it's transmitted
1224 * a packet. So we give it a dummy packet to transmit.
1225 */
1226 skb = dev_alloc_skb(ETHERMINPACKET);
1227 if (skb != NULL) {
1228 data = skb_put(skb, ETHERMINPACKET);
1229 memset(data, 0, ETHERMINPACKET);
1230 memcpy(data, dev->dev_addr, 6);
1231 memcpy(data+6, dev->dev_addr, 6);
1232 bmac_transmit_packet(skb, dev);
1233 }
1234 spin_unlock_irqrestore(&bp->lock, flags);
1235 }
1236
1237 static const struct ethtool_ops bmac_ethtool_ops = {
1238 .get_link = ethtool_op_get_link,
1239 };
1240
1241 static const struct net_device_ops bmac_netdev_ops = {
1242 .ndo_open = bmac_open,
1243 .ndo_stop = bmac_close,
1244 .ndo_start_xmit = bmac_output,
1245 .ndo_set_multicast_list = bmac_set_multicast,
1246 .ndo_set_mac_address = bmac_set_address,
1247 .ndo_change_mtu = eth_change_mtu,
1248 .ndo_validate_addr = eth_validate_addr,
1249 };
1250
1251 static int __devinit bmac_probe(struct macio_dev *mdev, const struct of_device_id *match)
1252 {
1253 int j, rev, ret;
1254 struct bmac_data *bp;
1255 const unsigned char *prop_addr;
1256 unsigned char addr[6];
1257 struct net_device *dev;
1258 int is_bmac_plus = ((int)match->data) != 0;
1259
1260 if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) {
1261 printk(KERN_ERR "BMAC: can't use, need 3 addrs and 3 intrs\n");
1262 return -ENODEV;
1263 }
1264 prop_addr = of_get_property(macio_get_of_node(mdev),
1265 "mac-address", NULL);
1266 if (prop_addr == NULL) {
1267 prop_addr = of_get_property(macio_get_of_node(mdev),
1268 "local-mac-address", NULL);
1269 if (prop_addr == NULL) {
1270 printk(KERN_ERR "BMAC: Can't get mac-address\n");
1271 return -ENODEV;
1272 }
1273 }
1274 memcpy(addr, prop_addr, sizeof(addr));
1275
1276 dev = alloc_etherdev(PRIV_BYTES);
1277 if (!dev) {
1278 printk(KERN_ERR "BMAC: alloc_etherdev failed, out of memory\n");
1279 return -ENOMEM;
1280 }
1281
1282 bp = netdev_priv(dev);
1283 SET_NETDEV_DEV(dev, &mdev->ofdev.dev);
1284 macio_set_drvdata(mdev, dev);
1285
1286 bp->mdev = mdev;
1287 spin_lock_init(&bp->lock);
1288
1289 if (macio_request_resources(mdev, "bmac")) {
1290 printk(KERN_ERR "BMAC: can't request IO resource !\n");
1291 goto out_free;
1292 }
1293
1294 dev->base_addr = (unsigned long)
1295 ioremap(macio_resource_start(mdev, 0), macio_resource_len(mdev, 0));
1296 if (dev->base_addr == 0)
1297 goto out_release;
1298
1299 dev->irq = macio_irq(mdev, 0);
1300
1301 bmac_enable_and_reset_chip(dev);
1302 bmwrite(dev, INTDISABLE, DisableAll);
1303
1304 rev = addr[0] == 0 && addr[1] == 0xA0;
1305 for (j = 0; j < 6; ++j)
1306 dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j];
1307
1308 /* Enable chip without interrupts for now */
1309 bmac_enable_and_reset_chip(dev);
1310 bmwrite(dev, INTDISABLE, DisableAll);
1311
1312 dev->netdev_ops = &bmac_netdev_ops;
1313 dev->ethtool_ops = &bmac_ethtool_ops;
1314
1315 bmac_get_station_address(dev, addr);
1316 if (bmac_verify_checksum(dev) != 0)
1317 goto err_out_iounmap;
1318
1319 bp->is_bmac_plus = is_bmac_plus;
1320 bp->tx_dma = ioremap(macio_resource_start(mdev, 1), macio_resource_len(mdev, 1));
1321 if (!bp->tx_dma)
1322 goto err_out_iounmap;
1323 bp->tx_dma_intr = macio_irq(mdev, 1);
1324 bp->rx_dma = ioremap(macio_resource_start(mdev, 2), macio_resource_len(mdev, 2));
1325 if (!bp->rx_dma)
1326 goto err_out_iounmap_tx;
1327 bp->rx_dma_intr = macio_irq(mdev, 2);
1328
1329 bp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(bp + 1);
1330 bp->rx_cmds = bp->tx_cmds + N_TX_RING + 1;
1331
1332 bp->queue = (struct sk_buff_head *)(bp->rx_cmds + N_RX_RING + 1);
1333 skb_queue_head_init(bp->queue);
1334
1335 init_timer(&bp->tx_timeout);
1336
1337 ret = request_irq(dev->irq, bmac_misc_intr, 0, "BMAC-misc", dev);
1338 if (ret) {
1339 printk(KERN_ERR "BMAC: can't get irq %d\n", dev->irq);
1340 goto err_out_iounmap_rx;
1341 }
1342 ret = request_irq(bp->tx_dma_intr, bmac_txdma_intr, 0, "BMAC-txdma", dev);
1343 if (ret) {
1344 printk(KERN_ERR "BMAC: can't get irq %d\n", bp->tx_dma_intr);
1345 goto err_out_irq0;
1346 }
1347 ret = request_irq(bp->rx_dma_intr, bmac_rxdma_intr, 0, "BMAC-rxdma", dev);
1348 if (ret) {
1349 printk(KERN_ERR "BMAC: can't get irq %d\n", bp->rx_dma_intr);
1350 goto err_out_irq1;
1351 }
1352
1353 /* Mask chip interrupts and disable chip, will be
1354 * re-enabled on open()
1355 */
1356 disable_irq(dev->irq);
1357 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
1358
1359 if (register_netdev(dev) != 0) {
1360 printk(KERN_ERR "BMAC: Ethernet registration failed\n");
1361 goto err_out_irq2;
1362 }
1363
1364 printk(KERN_INFO "%s: BMAC%s at %pM",
1365 dev->name, (is_bmac_plus ? "+" : ""), dev->dev_addr);
1366 XXDEBUG((", base_addr=%#0lx", dev->base_addr));
1367 printk("\n");
1368
1369 return 0;
1370
1371 err_out_irq2:
1372 free_irq(bp->rx_dma_intr, dev);
1373 err_out_irq1:
1374 free_irq(bp->tx_dma_intr, dev);
1375 err_out_irq0:
1376 free_irq(dev->irq, dev);
1377 err_out_iounmap_rx:
1378 iounmap(bp->rx_dma);
1379 err_out_iounmap_tx:
1380 iounmap(bp->tx_dma);
1381 err_out_iounmap:
1382 iounmap((void __iomem *)dev->base_addr);
1383 out_release:
1384 macio_release_resources(mdev);
1385 out_free:
1386 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
1387 free_netdev(dev);
1388
1389 return -ENODEV;
1390 }
1391
1392 static int bmac_open(struct net_device *dev)
1393 {
1394 struct bmac_data *bp = netdev_priv(dev);
1395 /* XXDEBUG(("bmac: enter open\n")); */
1396 /* reset the chip */
1397 bp->opened = 1;
1398 bmac_reset_and_enable(dev);
1399 enable_irq(dev->irq);
1400 return 0;
1401 }
1402
1403 static int bmac_close(struct net_device *dev)
1404 {
1405 struct bmac_data *bp = netdev_priv(dev);
1406 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
1407 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
1408 unsigned short config;
1409 int i;
1410
1411 bp->sleeping = 1;
1412
1413 /* disable rx and tx */
1414 config = bmread(dev, RXCFG);
1415 bmwrite(dev, RXCFG, (config & ~RxMACEnable));
1416
1417 config = bmread(dev, TXCFG);
1418 bmwrite(dev, TXCFG, (config & ~TxMACEnable));
1419
1420 bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */
1421
1422 /* disable rx and tx dma */
1423 st_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
1424 st_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */
1425
1426 /* free some skb's */
1427 XXDEBUG(("bmac: free rx bufs\n"));
1428 for (i=0; i<N_RX_RING; i++) {
1429 if (bp->rx_bufs[i] != NULL) {
1430 dev_kfree_skb(bp->rx_bufs[i]);
1431 bp->rx_bufs[i] = NULL;
1432 }
1433 }
1434 XXDEBUG(("bmac: free tx bufs\n"));
1435 for (i = 0; i<N_TX_RING; i++) {
1436 if (bp->tx_bufs[i] != NULL) {
1437 dev_kfree_skb(bp->tx_bufs[i]);
1438 bp->tx_bufs[i] = NULL;
1439 }
1440 }
1441 XXDEBUG(("bmac: all bufs freed\n"));
1442
1443 bp->opened = 0;
1444 disable_irq(dev->irq);
1445 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
1446
1447 return 0;
1448 }
1449
1450 static void
1451 bmac_start(struct net_device *dev)
1452 {
1453 struct bmac_data *bp = netdev_priv(dev);
1454 int i;
1455 struct sk_buff *skb;
1456 unsigned long flags;
1457
1458 if (bp->sleeping)
1459 return;
1460
1461 spin_lock_irqsave(&bp->lock, flags);
1462 while (1) {
1463 i = bp->tx_fill + 1;
1464 if (i >= N_TX_RING)
1465 i = 0;
1466 if (i == bp->tx_empty)
1467 break;
1468 skb = skb_dequeue(bp->queue);
1469 if (skb == NULL)
1470 break;
1471 bmac_transmit_packet(skb, dev);
1472 }
1473 spin_unlock_irqrestore(&bp->lock, flags);
1474 }
1475
1476 static int
1477 bmac_output(struct sk_buff *skb, struct net_device *dev)
1478 {
1479 struct bmac_data *bp = netdev_priv(dev);
1480 skb_queue_tail(bp->queue, skb);
1481 bmac_start(dev);
1482 return NETDEV_TX_OK;
1483 }
1484
1485 static void bmac_tx_timeout(unsigned long data)
1486 {
1487 struct net_device *dev = (struct net_device *) data;
1488 struct bmac_data *bp = netdev_priv(dev);
1489 volatile struct dbdma_regs __iomem *td = bp->tx_dma;
1490 volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
1491 volatile struct dbdma_cmd *cp;
1492 unsigned long flags;
1493 unsigned short config, oldConfig;
1494 int i;
1495
1496 XXDEBUG(("bmac: tx_timeout called\n"));
1497 spin_lock_irqsave(&bp->lock, flags);
1498 bp->timeout_active = 0;
1499
1500 /* update various counters */
1501 /* bmac_handle_misc_intrs(bp, 0); */
1502
1503 cp = &bp->tx_cmds[bp->tx_empty];
1504 /* XXDEBUG((KERN_DEBUG "bmac: tx dmastat=%x %x runt=%d pr=%x fs=%x fc=%x\n", */
1505 /* ld_le32(&td->status), ld_le16(&cp->xfer_status), bp->tx_bad_runt, */
1506 /* mb->pr, mb->xmtfs, mb->fifofc)); */
1507
1508 /* turn off both tx and rx and reset the chip */
1509 config = bmread(dev, RXCFG);
1510 bmwrite(dev, RXCFG, (config & ~RxMACEnable));
1511 config = bmread(dev, TXCFG);
1512 bmwrite(dev, TXCFG, (config & ~TxMACEnable));
1513 out_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD));
1514 printk(KERN_ERR "bmac: transmit timeout - resetting\n");
1515 bmac_enable_and_reset_chip(dev);
1516
1517 /* restart rx dma */
1518 cp = bus_to_virt(ld_le32(&rd->cmdptr));
1519 out_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD));
1520 out_le16(&cp->xfer_status, 0);
1521 out_le32(&rd->cmdptr, virt_to_bus(cp));
1522 out_le32(&rd->control, DBDMA_SET(RUN|WAKE));
1523
1524 /* fix up the transmit side */
1525 XXDEBUG((KERN_DEBUG "bmac: tx empty=%d fill=%d fullup=%d\n",
1526 bp->tx_empty, bp->tx_fill, bp->tx_fullup));
1527 i = bp->tx_empty;
1528 ++dev->stats.tx_errors;
1529 if (i != bp->tx_fill) {
1530 dev_kfree_skb(bp->tx_bufs[i]);
1531 bp->tx_bufs[i] = NULL;
1532 if (++i >= N_TX_RING) i = 0;
1533 bp->tx_empty = i;
1534 }
1535 bp->tx_fullup = 0;
1536 netif_wake_queue(dev);
1537 if (i != bp->tx_fill) {
1538 cp = &bp->tx_cmds[i];
1539 out_le16(&cp->xfer_status, 0);
1540 out_le16(&cp->command, OUTPUT_LAST);
1541 out_le32(&td->cmdptr, virt_to_bus(cp));
1542 out_le32(&td->control, DBDMA_SET(RUN));
1543 /* bmac_set_timeout(dev); */
1544 XXDEBUG((KERN_DEBUG "bmac: starting %d\n", i));
1545 }
1546
1547 /* turn it back on */
1548 oldConfig = bmread(dev, RXCFG);
1549 bmwrite(dev, RXCFG, oldConfig | RxMACEnable );
1550 oldConfig = bmread(dev, TXCFG);
1551 bmwrite(dev, TXCFG, oldConfig | TxMACEnable );
1552
1553 spin_unlock_irqrestore(&bp->lock, flags);
1554 }
1555
1556 #if 0
1557 static void dump_dbdma(volatile struct dbdma_cmd *cp,int count)
1558 {
1559 int i,*ip;
1560
1561 for (i=0;i< count;i++) {
1562 ip = (int*)(cp+i);
1563
1564 printk("dbdma req 0x%x addr 0x%x baddr 0x%x xfer/res 0x%x\n",
1565 ld_le32(ip+0),
1566 ld_le32(ip+1),
1567 ld_le32(ip+2),
1568 ld_le32(ip+3));
1569 }
1570
1571 }
1572 #endif
1573
1574 #if 0
1575 static int
1576 bmac_proc_info(char *buffer, char **start, off_t offset, int length)
1577 {
1578 int len = 0;
1579 off_t pos = 0;
1580 off_t begin = 0;
1581 int i;
1582
1583 if (bmac_devs == NULL)
1584 return -ENOSYS;
1585
1586 len += sprintf(buffer, "BMAC counters & registers\n");
1587
1588 for (i = 0; i<N_REG_ENTRIES; i++) {
1589 len += sprintf(buffer + len, "%s: %#08x\n",
1590 reg_entries[i].name,
1591 bmread(bmac_devs, reg_entries[i].reg_offset));
1592 pos = begin + len;
1593
1594 if (pos < offset) {
1595 len = 0;
1596 begin = pos;
1597 }
1598
1599 if (pos > offset+length) break;
1600 }
1601
1602 *start = buffer + (offset - begin);
1603 len -= (offset - begin);
1604
1605 if (len > length) len = length;
1606
1607 return len;
1608 }
1609 #endif
1610
1611 static int __devexit bmac_remove(struct macio_dev *mdev)
1612 {
1613 struct net_device *dev = macio_get_drvdata(mdev);
1614 struct bmac_data *bp = netdev_priv(dev);
1615
1616 unregister_netdev(dev);
1617
1618 free_irq(dev->irq, dev);
1619 free_irq(bp->tx_dma_intr, dev);
1620 free_irq(bp->rx_dma_intr, dev);
1621
1622 iounmap((void __iomem *)dev->base_addr);
1623 iounmap(bp->tx_dma);
1624 iounmap(bp->rx_dma);
1625
1626 macio_release_resources(mdev);
1627
1628 free_netdev(dev);
1629
1630 return 0;
1631 }
1632
1633 static struct of_device_id bmac_match[] =
1634 {
1635 {
1636 .name = "bmac",
1637 .data = (void *)0,
1638 },
1639 {
1640 .type = "network",
1641 .compatible = "bmac+",
1642 .data = (void *)1,
1643 },
1644 {},
1645 };
1646 MODULE_DEVICE_TABLE (of, bmac_match);
1647
1648 static struct macio_driver bmac_driver =
1649 {
1650 .driver = {
1651 .name = "bmac",
1652 .owner = THIS_MODULE,
1653 .of_match_table = bmac_match,
1654 },
1655 .probe = bmac_probe,
1656 .remove = bmac_remove,
1657 #ifdef CONFIG_PM
1658 .suspend = bmac_suspend,
1659 .resume = bmac_resume,
1660 #endif
1661 };
1662
1663
1664 static int __init bmac_init(void)
1665 {
1666 if (bmac_emergency_rxbuf == NULL) {
1667 bmac_emergency_rxbuf = kmalloc(RX_BUFLEN, GFP_KERNEL);
1668 if (bmac_emergency_rxbuf == NULL) {
1669 printk(KERN_ERR "BMAC: can't allocate emergency RX buffer\n");
1670 return -ENOMEM;
1671 }
1672 }
1673
1674 return macio_register_driver(&bmac_driver);
1675 }
1676
1677 static void __exit bmac_exit(void)
1678 {
1679 macio_unregister_driver(&bmac_driver);
1680
1681 kfree(bmac_emergency_rxbuf);
1682 bmac_emergency_rxbuf = NULL;
1683 }
1684
1685 MODULE_AUTHOR("Randy Gobbel/Paul Mackerras");
1686 MODULE_DESCRIPTION("PowerMac BMAC ethernet driver.");
1687 MODULE_LICENSE("GPL");
1688
1689 module_init(bmac_init);
1690 module_exit(bmac_exit);