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packet: Add fanout support.
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / sunqe.c
blob18ecdc303751055b63f26c20b5dfd136da32688e
1 /* sunqe.c: Sparc QuadEthernet 10baseT SBUS card driver.
2 * Once again I am out to prove that every ethernet
3 * controller out there can be most efficiently programmed
4 * if you make it look like a LANCE.
5 *
6 * Copyright (C) 1996, 1999, 2003, 2006, 2008 David S. Miller (davem@davemloft.net)
7 */
8
9 #include <linux/module.h>
10 #include <linux/kernel.h>
11 #include <linux/types.h>
12 #include <linux/errno.h>
13 #include <linux/fcntl.h>
14 #include <linux/interrupt.h>
15 #include <linux/ioport.h>
16 #include <linux/in.h>
17 #include <linux/slab.h>
18 #include <linux/string.h>
19 #include <linux/delay.h>
20 #include <linux/init.h>
21 #include <linux/crc32.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/skbuff.h>
25 #include <linux/ethtool.h>
26 #include <linux/bitops.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/of.h>
29 #include <linux/of_device.h>
30
31 #include <asm/system.h>
32 #include <asm/io.h>
33 #include <asm/dma.h>
34 #include <asm/byteorder.h>
35 #include <asm/idprom.h>
36 #include <asm/openprom.h>
37 #include <asm/oplib.h>
38 #include <asm/auxio.h>
39 #include <asm/pgtable.h>
40 #include <asm/irq.h>
41
42 #include "sunqe.h"
43
44 #define DRV_NAME "sunqe"
45 #define DRV_VERSION "4.1"
46 #define DRV_RELDATE "August 27, 2008"
47 #define DRV_AUTHOR "David S. Miller (davem@davemloft.net)"
48
49 static char version[] =
50 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
51
52 MODULE_VERSION(DRV_VERSION);
53 MODULE_AUTHOR(DRV_AUTHOR);
54 MODULE_DESCRIPTION("Sun QuadEthernet 10baseT SBUS card driver");
55 MODULE_LICENSE("GPL");
56
57 static struct sunqec *root_qec_dev;
58
59 static void qe_set_multicast(struct net_device *dev);
60
61 #define QEC_RESET_TRIES 200
62
63 static inline int qec_global_reset(void __iomem *gregs)
64 {
65 int tries = QEC_RESET_TRIES;
66
67 sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL);
68 while (--tries) {
69 u32 tmp = sbus_readl(gregs + GLOB_CTRL);
70 if (tmp & GLOB_CTRL_RESET) {
71 udelay(20);
72 continue;
73 }
74 break;
75 }
76 if (tries)
77 return 0;
78 printk(KERN_ERR "QuadEther: AIEEE cannot reset the QEC!\n");
79 return -1;
80 }
81
82 #define MACE_RESET_RETRIES 200
83 #define QE_RESET_RETRIES 200
84
85 static inline int qe_stop(struct sunqe *qep)
86 {
87 void __iomem *cregs = qep->qcregs;
88 void __iomem *mregs = qep->mregs;
89 int tries;
90
91 /* Reset the MACE, then the QEC channel. */
92 sbus_writeb(MREGS_BCONFIG_RESET, mregs + MREGS_BCONFIG);
93 tries = MACE_RESET_RETRIES;
94 while (--tries) {
95 u8 tmp = sbus_readb(mregs + MREGS_BCONFIG);
96 if (tmp & MREGS_BCONFIG_RESET) {
97 udelay(20);
98 continue;
99 }
100 break;
101 }
102 if (!tries) {
103 printk(KERN_ERR "QuadEther: AIEEE cannot reset the MACE!\n");
104 return -1;
105 }
106
107 sbus_writel(CREG_CTRL_RESET, cregs + CREG_CTRL);
108 tries = QE_RESET_RETRIES;
109 while (--tries) {
110 u32 tmp = sbus_readl(cregs + CREG_CTRL);
111 if (tmp & CREG_CTRL_RESET) {
112 udelay(20);
113 continue;
114 }
115 break;
116 }
117 if (!tries) {
118 printk(KERN_ERR "QuadEther: Cannot reset QE channel!\n");
119 return -1;
120 }
121 return 0;
122 }
123
124 static void qe_init_rings(struct sunqe *qep)
125 {
126 struct qe_init_block *qb = qep->qe_block;
127 struct sunqe_buffers *qbufs = qep->buffers;
128 __u32 qbufs_dvma = qep->buffers_dvma;
129 int i;
130
131 qep->rx_new = qep->rx_old = qep->tx_new = qep->tx_old = 0;
132 memset(qb, 0, sizeof(struct qe_init_block));
133 memset(qbufs, 0, sizeof(struct sunqe_buffers));
134 for (i = 0; i < RX_RING_SIZE; i++) {
135 qb->qe_rxd[i].rx_addr = qbufs_dvma + qebuf_offset(rx_buf, i);
136 qb->qe_rxd[i].rx_flags =
137 (RXD_OWN | ((RXD_PKT_SZ) & RXD_LENGTH));
138 }
139 }
140
141 static int qe_init(struct sunqe *qep, int from_irq)
142 {
143 struct sunqec *qecp = qep->parent;
144 void __iomem *cregs = qep->qcregs;
145 void __iomem *mregs = qep->mregs;
146 void __iomem *gregs = qecp->gregs;
147 unsigned char *e = &qep->dev->dev_addr[0];
148 u32 tmp;
149 int i;
150
151 /* Shut it up. */
152 if (qe_stop(qep))
153 return -EAGAIN;
154
155 /* Setup initial rx/tx init block pointers. */
156 sbus_writel(qep->qblock_dvma + qib_offset(qe_rxd, 0), cregs + CREG_RXDS);
157 sbus_writel(qep->qblock_dvma + qib_offset(qe_txd, 0), cregs + CREG_TXDS);
158
159 /* Enable/mask the various irq's. */
160 sbus_writel(0, cregs + CREG_RIMASK);
161 sbus_writel(1, cregs + CREG_TIMASK);
162
163 sbus_writel(0, cregs + CREG_QMASK);
164 sbus_writel(CREG_MMASK_RXCOLL, cregs + CREG_MMASK);
165
166 /* Setup the FIFO pointers into QEC local memory. */
167 tmp = qep->channel * sbus_readl(gregs + GLOB_MSIZE);
168 sbus_writel(tmp, cregs + CREG_RXRBUFPTR);
169 sbus_writel(tmp, cregs + CREG_RXWBUFPTR);
170
171 tmp = sbus_readl(cregs + CREG_RXRBUFPTR) +
172 sbus_readl(gregs + GLOB_RSIZE);
173 sbus_writel(tmp, cregs + CREG_TXRBUFPTR);
174 sbus_writel(tmp, cregs + CREG_TXWBUFPTR);
175
176 /* Clear the channel collision counter. */
177 sbus_writel(0, cregs + CREG_CCNT);
178
179 /* For 10baseT, inter frame space nor throttle seems to be necessary. */
180 sbus_writel(0, cregs + CREG_PIPG);
181
182 /* Now dork with the AMD MACE. */
183 sbus_writeb(MREGS_PHYCONFIG_AUTO, mregs + MREGS_PHYCONFIG);
184 sbus_writeb(MREGS_TXFCNTL_AUTOPAD, mregs + MREGS_TXFCNTL);
185 sbus_writeb(0, mregs + MREGS_RXFCNTL);
186
187 /* The QEC dma's the rx'd packets from local memory out to main memory,
188 * and therefore it interrupts when the packet reception is "complete".
189 * So don't listen for the MACE talking about it.
190 */
191 sbus_writeb(MREGS_IMASK_COLL | MREGS_IMASK_RXIRQ, mregs + MREGS_IMASK);
192 sbus_writeb(MREGS_BCONFIG_BSWAP | MREGS_BCONFIG_64TS, mregs + MREGS_BCONFIG);
193 sbus_writeb((MREGS_FCONFIG_TXF16 | MREGS_FCONFIG_RXF32 |
194 MREGS_FCONFIG_RFWU | MREGS_FCONFIG_TFWU),
195 mregs + MREGS_FCONFIG);
196
197 /* Only usable interface on QuadEther is twisted pair. */
198 sbus_writeb(MREGS_PLSCONFIG_TP, mregs + MREGS_PLSCONFIG);
199
200 /* Tell MACE we are changing the ether address. */
201 sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_PARESET,
202 mregs + MREGS_IACONFIG);
203 while ((sbus_readb(mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0)
204 barrier();
205 sbus_writeb(e[0], mregs + MREGS_ETHADDR);
206 sbus_writeb(e[1], mregs + MREGS_ETHADDR);
207 sbus_writeb(e[2], mregs + MREGS_ETHADDR);
208 sbus_writeb(e[3], mregs + MREGS_ETHADDR);
209 sbus_writeb(e[4], mregs + MREGS_ETHADDR);
210 sbus_writeb(e[5], mregs + MREGS_ETHADDR);
211
212 /* Clear out the address filter. */
213 sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET,
214 mregs + MREGS_IACONFIG);
215 while ((sbus_readb(mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0)
216 barrier();
217 for (i = 0; i < 8; i++)
218 sbus_writeb(0, mregs + MREGS_FILTER);
219
220 /* Address changes are now complete. */
221 sbus_writeb(0, mregs + MREGS_IACONFIG);
222
223 qe_init_rings(qep);
224
225 /* Wait a little bit for the link to come up... */
226 mdelay(5);
227 if (!(sbus_readb(mregs + MREGS_PHYCONFIG) & MREGS_PHYCONFIG_LTESTDIS)) {
228 int tries = 50;
229
230 while (--tries) {
231 u8 tmp;
232
233 mdelay(5);
234 barrier();
235 tmp = sbus_readb(mregs + MREGS_PHYCONFIG);
236 if ((tmp & MREGS_PHYCONFIG_LSTAT) != 0)
237 break;
238 }
239 if (tries == 0)
240 printk(KERN_NOTICE "%s: Warning, link state is down.\n", qep->dev->name);
241 }
242
243 /* Missed packet counter is cleared on a read. */
244 sbus_readb(mregs + MREGS_MPCNT);
245
246 /* Reload multicast information, this will enable the receiver
247 * and transmitter.
248 */
249 qe_set_multicast(qep->dev);
250
251 /* QEC should now start to show interrupts. */
252 return 0;
253 }
254
255 /* Grrr, certain error conditions completely lock up the AMD MACE,
256 * so when we get these we _must_ reset the chip.
257 */
258 static int qe_is_bolixed(struct sunqe *qep, u32 qe_status)
259 {
260 struct net_device *dev = qep->dev;
261 int mace_hwbug_workaround = 0;
262
263 if (qe_status & CREG_STAT_EDEFER) {
264 printk(KERN_ERR "%s: Excessive transmit defers.\n", dev->name);
265 dev->stats.tx_errors++;
266 }
267
268 if (qe_status & CREG_STAT_CLOSS) {
269 printk(KERN_ERR "%s: Carrier lost, link down?\n", dev->name);
270 dev->stats.tx_errors++;
271 dev->stats.tx_carrier_errors++;
272 }
273
274 if (qe_status & CREG_STAT_ERETRIES) {
275 printk(KERN_ERR "%s: Excessive transmit retries (more than 16).\n", dev->name);
276 dev->stats.tx_errors++;
277 mace_hwbug_workaround = 1;
278 }
279
280 if (qe_status & CREG_STAT_LCOLL) {
281 printk(KERN_ERR "%s: Late transmit collision.\n", dev->name);
282 dev->stats.tx_errors++;
283 dev->stats.collisions++;
284 mace_hwbug_workaround = 1;
285 }
286
287 if (qe_status & CREG_STAT_FUFLOW) {
288 printk(KERN_ERR "%s: Transmit fifo underflow, driver bug.\n", dev->name);
289 dev->stats.tx_errors++;
290 mace_hwbug_workaround = 1;
291 }
292
293 if (qe_status & CREG_STAT_JERROR) {
294 printk(KERN_ERR "%s: Jabber error.\n", dev->name);
295 }
296
297 if (qe_status & CREG_STAT_BERROR) {
298 printk(KERN_ERR "%s: Babble error.\n", dev->name);
299 }
300
301 if (qe_status & CREG_STAT_CCOFLOW) {
302 dev->stats.tx_errors += 256;
303 dev->stats.collisions += 256;
304 }
305
306 if (qe_status & CREG_STAT_TXDERROR) {
307 printk(KERN_ERR "%s: Transmit descriptor is bogus, driver bug.\n", dev->name);
308 dev->stats.tx_errors++;
309 dev->stats.tx_aborted_errors++;
310 mace_hwbug_workaround = 1;
311 }
312
313 if (qe_status & CREG_STAT_TXLERR) {
314 printk(KERN_ERR "%s: Transmit late error.\n", dev->name);
315 dev->stats.tx_errors++;
316 mace_hwbug_workaround = 1;
317 }
318
319 if (qe_status & CREG_STAT_TXPERR) {
320 printk(KERN_ERR "%s: Transmit DMA parity error.\n", dev->name);
321 dev->stats.tx_errors++;
322 dev->stats.tx_aborted_errors++;
323 mace_hwbug_workaround = 1;
324 }
325
326 if (qe_status & CREG_STAT_TXSERR) {
327 printk(KERN_ERR "%s: Transmit DMA sbus error ack.\n", dev->name);
328 dev->stats.tx_errors++;
329 dev->stats.tx_aborted_errors++;
330 mace_hwbug_workaround = 1;
331 }
332
333 if (qe_status & CREG_STAT_RCCOFLOW) {
334 dev->stats.rx_errors += 256;
335 dev->stats.collisions += 256;
336 }
337
338 if (qe_status & CREG_STAT_RUOFLOW) {
339 dev->stats.rx_errors += 256;
340 dev->stats.rx_over_errors += 256;
341 }
342
343 if (qe_status & CREG_STAT_MCOFLOW) {
344 dev->stats.rx_errors += 256;
345 dev->stats.rx_missed_errors += 256;
346 }
347
348 if (qe_status & CREG_STAT_RXFOFLOW) {
349 printk(KERN_ERR "%s: Receive fifo overflow.\n", dev->name);
350 dev->stats.rx_errors++;
351 dev->stats.rx_over_errors++;
352 }
353
354 if (qe_status & CREG_STAT_RLCOLL) {
355 printk(KERN_ERR "%s: Late receive collision.\n", dev->name);
356 dev->stats.rx_errors++;
357 dev->stats.collisions++;
358 }
359
360 if (qe_status & CREG_STAT_FCOFLOW) {
361 dev->stats.rx_errors += 256;
362 dev->stats.rx_frame_errors += 256;
363 }
364
365 if (qe_status & CREG_STAT_CECOFLOW) {
366 dev->stats.rx_errors += 256;
367 dev->stats.rx_crc_errors += 256;
368 }
369
370 if (qe_status & CREG_STAT_RXDROP) {
371 printk(KERN_ERR "%s: Receive packet dropped.\n", dev->name);
372 dev->stats.rx_errors++;
373 dev->stats.rx_dropped++;
374 dev->stats.rx_missed_errors++;
375 }
376
377 if (qe_status & CREG_STAT_RXSMALL) {
378 printk(KERN_ERR "%s: Receive buffer too small, driver bug.\n", dev->name);
379 dev->stats.rx_errors++;
380 dev->stats.rx_length_errors++;
381 }
382
383 if (qe_status & CREG_STAT_RXLERR) {
384 printk(KERN_ERR "%s: Receive late error.\n", dev->name);
385 dev->stats.rx_errors++;
386 mace_hwbug_workaround = 1;
387 }
388
389 if (qe_status & CREG_STAT_RXPERR) {
390 printk(KERN_ERR "%s: Receive DMA parity error.\n", dev->name);
391 dev->stats.rx_errors++;
392 dev->stats.rx_missed_errors++;
393 mace_hwbug_workaround = 1;
394 }
395
396 if (qe_status & CREG_STAT_RXSERR) {
397 printk(KERN_ERR "%s: Receive DMA sbus error ack.\n", dev->name);
398 dev->stats.rx_errors++;
399 dev->stats.rx_missed_errors++;
400 mace_hwbug_workaround = 1;
401 }
402
403 if (mace_hwbug_workaround)
404 qe_init(qep, 1);
405 return mace_hwbug_workaround;
406 }
407
408 /* Per-QE receive interrupt service routine. Just like on the happy meal
409 * we receive directly into skb's with a small packet copy water mark.
410 */
411 static void qe_rx(struct sunqe *qep)
412 {
413 struct qe_rxd *rxbase = &qep->qe_block->qe_rxd[0];
414 struct net_device *dev = qep->dev;
415 struct qe_rxd *this;
416 struct sunqe_buffers *qbufs = qep->buffers;
417 __u32 qbufs_dvma = qep->buffers_dvma;
418 int elem = qep->rx_new, drops = 0;
419 u32 flags;
420
421 this = &rxbase[elem];
422 while (!((flags = this->rx_flags) & RXD_OWN)) {
423 struct sk_buff *skb;
424 unsigned char *this_qbuf =
425 &qbufs->rx_buf[elem & (RX_RING_SIZE - 1)][0];
426 __u32 this_qbuf_dvma = qbufs_dvma +
427 qebuf_offset(rx_buf, (elem & (RX_RING_SIZE - 1)));
428 struct qe_rxd *end_rxd =
429 &rxbase[(elem+RX_RING_SIZE)&(RX_RING_MAXSIZE-1)];
430 int len = (flags & RXD_LENGTH) - 4; /* QE adds ether FCS size to len */
431
432 /* Check for errors. */
433 if (len < ETH_ZLEN) {
434 dev->stats.rx_errors++;
435 dev->stats.rx_length_errors++;
436 dev->stats.rx_dropped++;
437 } else {
438 skb = dev_alloc_skb(len + 2);
439 if (skb == NULL) {
440 drops++;
441 dev->stats.rx_dropped++;
442 } else {
443 skb_reserve(skb, 2);
444 skb_put(skb, len);
445 skb_copy_to_linear_data(skb, (unsigned char *) this_qbuf,
446 len);
447 skb->protocol = eth_type_trans(skb, qep->dev);
448 netif_rx(skb);
449 dev->stats.rx_packets++;
450 dev->stats.rx_bytes += len;
451 }
452 }
453 end_rxd->rx_addr = this_qbuf_dvma;
454 end_rxd->rx_flags = (RXD_OWN | ((RXD_PKT_SZ) & RXD_LENGTH));
455
456 elem = NEXT_RX(elem);
457 this = &rxbase[elem];
458 }
459 qep->rx_new = elem;
460 if (drops)
461 printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", qep->dev->name);
462 }
463
464 static void qe_tx_reclaim(struct sunqe *qep);
465
466 /* Interrupts for all QE's get filtered out via the QEC master controller,
467 * so we just run through each qe and check to see who is signaling
468 * and thus needs to be serviced.
469 */
470 static irqreturn_t qec_interrupt(int irq, void *dev_id)
471 {
472 struct sunqec *qecp = dev_id;
473 u32 qec_status;
474 int channel = 0;
475
476 /* Latch the status now. */
477 qec_status = sbus_readl(qecp->gregs + GLOB_STAT);
478 while (channel < 4) {
479 if (qec_status & 0xf) {
480 struct sunqe *qep = qecp->qes[channel];
481 u32 qe_status;
482
483 qe_status = sbus_readl(qep->qcregs + CREG_STAT);
484 if (qe_status & CREG_STAT_ERRORS) {
485 if (qe_is_bolixed(qep, qe_status))
486 goto next;
487 }
488 if (qe_status & CREG_STAT_RXIRQ)
489 qe_rx(qep);
490 if (netif_queue_stopped(qep->dev) &&
491 (qe_status & CREG_STAT_TXIRQ)) {
492 spin_lock(&qep->lock);
493 qe_tx_reclaim(qep);
494 if (TX_BUFFS_AVAIL(qep) > 0) {
495 /* Wake net queue and return to
496 * lazy tx reclaim.
497 */
498 netif_wake_queue(qep->dev);
499 sbus_writel(1, qep->qcregs + CREG_TIMASK);
500 }
501 spin_unlock(&qep->lock);
502 }
503 next:
504 ;
505 }
506 qec_status >>= 4;
507 channel++;
508 }
509
510 return IRQ_HANDLED;
511 }
512
513 static int qe_open(struct net_device *dev)
514 {
515 struct sunqe *qep = netdev_priv(dev);
516
517 qep->mconfig = (MREGS_MCONFIG_TXENAB |
518 MREGS_MCONFIG_RXENAB |
519 MREGS_MCONFIG_MBAENAB);
520 return qe_init(qep, 0);
521 }
522
523 static int qe_close(struct net_device *dev)
524 {
525 struct sunqe *qep = netdev_priv(dev);
526
527 qe_stop(qep);
528 return 0;
529 }
530
531 /* Reclaim TX'd frames from the ring. This must always run under
532 * the IRQ protected qep->lock.
533 */
534 static void qe_tx_reclaim(struct sunqe *qep)
535 {
536 struct qe_txd *txbase = &qep->qe_block->qe_txd[0];
537 int elem = qep->tx_old;
538
539 while (elem != qep->tx_new) {
540 u32 flags = txbase[elem].tx_flags;
541
542 if (flags & TXD_OWN)
543 break;
544 elem = NEXT_TX(elem);
545 }
546 qep->tx_old = elem;
547 }
548
549 static void qe_tx_timeout(struct net_device *dev)
550 {
551 struct sunqe *qep = netdev_priv(dev);
552 int tx_full;
553
554 spin_lock_irq(&qep->lock);
555
556 /* Try to reclaim, if that frees up some tx
557 * entries, we're fine.
558 */
559 qe_tx_reclaim(qep);
560 tx_full = TX_BUFFS_AVAIL(qep) <= 0;
561
562 spin_unlock_irq(&qep->lock);
563
564 if (! tx_full)
565 goto out;
566
567 printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
568 qe_init(qep, 1);
569
570 out:
571 netif_wake_queue(dev);
572 }
573
574 /* Get a packet queued to go onto the wire. */
575 static int qe_start_xmit(struct sk_buff *skb, struct net_device *dev)
576 {
577 struct sunqe *qep = netdev_priv(dev);
578 struct sunqe_buffers *qbufs = qep->buffers;
579 __u32 txbuf_dvma, qbufs_dvma = qep->buffers_dvma;
580 unsigned char *txbuf;
581 int len, entry;
582
583 spin_lock_irq(&qep->lock);
584
585 qe_tx_reclaim(qep);
586
587 len = skb->len;
588 entry = qep->tx_new;
589
590 txbuf = &qbufs->tx_buf[entry & (TX_RING_SIZE - 1)][0];
591 txbuf_dvma = qbufs_dvma +
592 qebuf_offset(tx_buf, (entry & (TX_RING_SIZE - 1)));
593
594 /* Avoid a race... */
595 qep->qe_block->qe_txd[entry].tx_flags = TXD_UPDATE;
596
597 skb_copy_from_linear_data(skb, txbuf, len);
598
599 qep->qe_block->qe_txd[entry].tx_addr = txbuf_dvma;
600 qep->qe_block->qe_txd[entry].tx_flags =
601 (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
602 qep->tx_new = NEXT_TX(entry);
603
604 /* Get it going. */
605 sbus_writel(CREG_CTRL_TWAKEUP, qep->qcregs + CREG_CTRL);
606
607 dev->stats.tx_packets++;
608 dev->stats.tx_bytes += len;
609
610 if (TX_BUFFS_AVAIL(qep) <= 0) {
611 /* Halt the net queue and enable tx interrupts.
612 * When the tx queue empties the tx irq handler
613 * will wake up the queue and return us back to
614 * the lazy tx reclaim scheme.
615 */
616 netif_stop_queue(dev);
617 sbus_writel(0, qep->qcregs + CREG_TIMASK);
618 }
619 spin_unlock_irq(&qep->lock);
620
621 dev_kfree_skb(skb);
622
623 return NETDEV_TX_OK;
624 }
625
626 static void qe_set_multicast(struct net_device *dev)
627 {
628 struct sunqe *qep = netdev_priv(dev);
629 struct netdev_hw_addr *ha;
630 u8 new_mconfig = qep->mconfig;
631 char *addrs;
632 int i;
633 u32 crc;
634
635 /* Lock out others. */
636 netif_stop_queue(dev);
637
638 if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
639 sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET,
640 qep->mregs + MREGS_IACONFIG);
641 while ((sbus_readb(qep->mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0)
642 barrier();
643 for (i = 0; i < 8; i++)
644 sbus_writeb(0xff, qep->mregs + MREGS_FILTER);
645 sbus_writeb(0, qep->mregs + MREGS_IACONFIG);
646 } else if (dev->flags & IFF_PROMISC) {
647 new_mconfig |= MREGS_MCONFIG_PROMISC;
648 } else {
649 u16 hash_table[4];
650 u8 *hbytes = (unsigned char *) &hash_table[0];
651
652 memset(hash_table, 0, sizeof(hash_table));
653 netdev_for_each_mc_addr(ha, dev) {
654 addrs = ha->addr;
655
656 if (!(*addrs & 1))
657 continue;
658 crc = ether_crc_le(6, addrs);
659 crc >>= 26;
660 hash_table[crc >> 4] |= 1 << (crc & 0xf);
661 }
662 /* Program the qe with the new filter value. */
663 sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET,
664 qep->mregs + MREGS_IACONFIG);
665 while ((sbus_readb(qep->mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0)
666 barrier();
667 for (i = 0; i < 8; i++) {
668 u8 tmp = *hbytes++;
669 sbus_writeb(tmp, qep->mregs + MREGS_FILTER);
670 }
671 sbus_writeb(0, qep->mregs + MREGS_IACONFIG);
672 }
673
674 /* Any change of the logical address filter, the physical address,
675 * or enabling/disabling promiscuous mode causes the MACE to disable
676 * the receiver. So we must re-enable them here or else the MACE
677 * refuses to listen to anything on the network. Sheesh, took
678 * me a day or two to find this bug.
679 */
680 qep->mconfig = new_mconfig;
681 sbus_writeb(qep->mconfig, qep->mregs + MREGS_MCONFIG);
682
683 /* Let us get going again. */
684 netif_wake_queue(dev);
685 }
686
687 /* Ethtool support... */
688 static void qe_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
689 {
690 const struct linux_prom_registers *regs;
691 struct sunqe *qep = netdev_priv(dev);
692 struct platform_device *op;
693
694 strcpy(info->driver, "sunqe");
695 strcpy(info->version, "3.0");
696
697 op = qep->op;
698 regs = of_get_property(op->dev.of_node, "reg", NULL);
699 if (regs)
700 sprintf(info->bus_info, "SBUS:%d", regs->which_io);
701
702 }
703
704 static u32 qe_get_link(struct net_device *dev)
705 {
706 struct sunqe *qep = netdev_priv(dev);
707 void __iomem *mregs = qep->mregs;
708 u8 phyconfig;
709
710 spin_lock_irq(&qep->lock);
711 phyconfig = sbus_readb(mregs + MREGS_PHYCONFIG);
712 spin_unlock_irq(&qep->lock);
713
714 return phyconfig & MREGS_PHYCONFIG_LSTAT;
715 }
716
717 static const struct ethtool_ops qe_ethtool_ops = {
718 .get_drvinfo = qe_get_drvinfo,
719 .get_link = qe_get_link,
720 };
721
722 /* This is only called once at boot time for each card probed. */
723 static void qec_init_once(struct sunqec *qecp, struct platform_device *op)
724 {
725 u8 bsizes = qecp->qec_bursts;
726
727 if (sbus_can_burst64() && (bsizes & DMA_BURST64)) {
728 sbus_writel(GLOB_CTRL_B64, qecp->gregs + GLOB_CTRL);
729 } else if (bsizes & DMA_BURST32) {
730 sbus_writel(GLOB_CTRL_B32, qecp->gregs + GLOB_CTRL);
731 } else {
732 sbus_writel(GLOB_CTRL_B16, qecp->gregs + GLOB_CTRL);
733 }
734
735 /* Packetsize only used in 100baseT BigMAC configurations,
736 * set it to zero just to be on the safe side.
737 */
738 sbus_writel(GLOB_PSIZE_2048, qecp->gregs + GLOB_PSIZE);
739
740 /* Set the local memsize register, divided up to one piece per QE channel. */
741 sbus_writel((resource_size(&op->resource[1]) >> 2),
742 qecp->gregs + GLOB_MSIZE);
743
744 /* Divide up the local QEC memory amongst the 4 QE receiver and
745 * transmitter FIFOs. Basically it is (total / 2 / num_channels).
746 */
747 sbus_writel((resource_size(&op->resource[1]) >> 2) >> 1,
748 qecp->gregs + GLOB_TSIZE);
749 sbus_writel((resource_size(&op->resource[1]) >> 2) >> 1,
750 qecp->gregs + GLOB_RSIZE);
751 }
752
753 static u8 __devinit qec_get_burst(struct device_node *dp)
754 {
755 u8 bsizes, bsizes_more;
756
757 /* Find and set the burst sizes for the QEC, since it
758 * does the actual dma for all 4 channels.
759 */
760 bsizes = of_getintprop_default(dp, "burst-sizes", 0xff);
761 bsizes &= 0xff;
762 bsizes_more = of_getintprop_default(dp->parent, "burst-sizes", 0xff);
763
764 if (bsizes_more != 0xff)
765 bsizes &= bsizes_more;
766 if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
767 (bsizes & DMA_BURST32)==0)
768 bsizes = (DMA_BURST32 - 1);
769
770 return bsizes;
771 }
772
773 static struct sunqec * __devinit get_qec(struct platform_device *child)
774 {
775 struct platform_device *op = to_platform_device(child->dev.parent);
776 struct sunqec *qecp;
777
778 qecp = dev_get_drvdata(&op->dev);
779 if (!qecp) {
780 qecp = kzalloc(sizeof(struct sunqec), GFP_KERNEL);
781 if (qecp) {
782 u32 ctrl;
783
784 qecp->op = op;
785 qecp->gregs = of_ioremap(&op->resource[0], 0,
786 GLOB_REG_SIZE,
787 "QEC Global Registers");
788 if (!qecp->gregs)
789 goto fail;
790
791 /* Make sure the QEC is in MACE mode. */
792 ctrl = sbus_readl(qecp->gregs + GLOB_CTRL);
793 ctrl &= 0xf0000000;
794 if (ctrl != GLOB_CTRL_MMODE) {
795 printk(KERN_ERR "qec: Not in MACE mode!\n");
796 goto fail;
797 }
798
799 if (qec_global_reset(qecp->gregs))
800 goto fail;
801
802 qecp->qec_bursts = qec_get_burst(op->dev.of_node);
803
804 qec_init_once(qecp, op);
805
806 if (request_irq(op->archdata.irqs[0], qec_interrupt,
807 IRQF_SHARED, "qec", (void *) qecp)) {
808 printk(KERN_ERR "qec: Can't register irq.\n");
809 goto fail;
810 }
811
812 dev_set_drvdata(&op->dev, qecp);
813
814 qecp->next_module = root_qec_dev;
815 root_qec_dev = qecp;
816 }
817 }
818
819 return qecp;
820
821 fail:
822 if (qecp->gregs)
823 of_iounmap(&op->resource[0], qecp->gregs, GLOB_REG_SIZE);
824 kfree(qecp);
825 return NULL;
826 }
827
828 static const struct net_device_ops qec_ops = {
829 .ndo_open = qe_open,
830 .ndo_stop = qe_close,
831 .ndo_start_xmit = qe_start_xmit,
832 .ndo_set_multicast_list = qe_set_multicast,
833 .ndo_tx_timeout = qe_tx_timeout,
834 .ndo_change_mtu = eth_change_mtu,
835 .ndo_set_mac_address = eth_mac_addr,
836 .ndo_validate_addr = eth_validate_addr,
837 };
838
839 static int __devinit qec_ether_init(struct platform_device *op)
840 {
841 static unsigned version_printed;
842 struct net_device *dev;
843 struct sunqec *qecp;
844 struct sunqe *qe;
845 int i, res;
846
847 if (version_printed++ == 0)
848 printk(KERN_INFO "%s", version);
849
850 dev = alloc_etherdev(sizeof(struct sunqe));
851 if (!dev)
852 return -ENOMEM;
853
854 memcpy(dev->dev_addr, idprom->id_ethaddr, 6);
855
856 qe = netdev_priv(dev);
857
858 res = -ENODEV;
859
860 i = of_getintprop_default(op->dev.of_node, "channel#", -1);
861 if (i == -1)
862 goto fail;
863 qe->channel = i;
864 spin_lock_init(&qe->lock);
865
866 qecp = get_qec(op);
867 if (!qecp)
868 goto fail;
869
870 qecp->qes[qe->channel] = qe;
871 qe->dev = dev;
872 qe->parent = qecp;
873 qe->op = op;
874
875 res = -ENOMEM;
876 qe->qcregs = of_ioremap(&op->resource[0], 0,
877 CREG_REG_SIZE, "QEC Channel Registers");
878 if (!qe->qcregs) {
879 printk(KERN_ERR "qe: Cannot map channel registers.\n");
880 goto fail;
881 }
882
883 qe->mregs = of_ioremap(&op->resource[1], 0,
884 MREGS_REG_SIZE, "QE MACE Registers");
885 if (!qe->mregs) {
886 printk(KERN_ERR "qe: Cannot map MACE registers.\n");
887 goto fail;
888 }
889
890 qe->qe_block = dma_alloc_coherent(&op->dev, PAGE_SIZE,
891 &qe->qblock_dvma, GFP_ATOMIC);
892 qe->buffers = dma_alloc_coherent(&op->dev, sizeof(struct sunqe_buffers),
893 &qe->buffers_dvma, GFP_ATOMIC);
894 if (qe->qe_block == NULL || qe->qblock_dvma == 0 ||
895 qe->buffers == NULL || qe->buffers_dvma == 0)
896 goto fail;
897
898 /* Stop this QE. */
899 qe_stop(qe);
900
901 SET_NETDEV_DEV(dev, &op->dev);
902
903 dev->watchdog_timeo = 5*HZ;
904 dev->irq = op->archdata.irqs[0];
905 dev->dma = 0;
906 dev->ethtool_ops = &qe_ethtool_ops;
907 dev->netdev_ops = &qec_ops;
908
909 res = register_netdev(dev);
910 if (res)
911 goto fail;
912
913 dev_set_drvdata(&op->dev, qe);
914
915 printk(KERN_INFO "%s: qe channel[%d] ", dev->name, qe->channel);
916 for (i = 0; i < 6; i++)
917 printk ("%2.2x%c",
918 dev->dev_addr[i],
919 i == 5 ? ' ': ':');
920 printk("\n");
921
922
923 return 0;
924
925 fail:
926 if (qe->qcregs)
927 of_iounmap(&op->resource[0], qe->qcregs, CREG_REG_SIZE);
928 if (qe->mregs)
929 of_iounmap(&op->resource[1], qe->mregs, MREGS_REG_SIZE);
930 if (qe->qe_block)
931 dma_free_coherent(&op->dev, PAGE_SIZE,
932 qe->qe_block, qe->qblock_dvma);
933 if (qe->buffers)
934 dma_free_coherent(&op->dev,
935 sizeof(struct sunqe_buffers),
936 qe->buffers,
937 qe->buffers_dvma);
938
939 free_netdev(dev);
940
941 return res;
942 }
943
944 static int __devinit qec_sbus_probe(struct platform_device *op)
945 {
946 return qec_ether_init(op);
947 }
948
949 static int __devexit qec_sbus_remove(struct platform_device *op)
950 {
951 struct sunqe *qp = dev_get_drvdata(&op->dev);
952 struct net_device *net_dev = qp->dev;
953
954 unregister_netdev(net_dev);
955
956 of_iounmap(&op->resource[0], qp->qcregs, CREG_REG_SIZE);
957 of_iounmap(&op->resource[1], qp->mregs, MREGS_REG_SIZE);
958 dma_free_coherent(&op->dev, PAGE_SIZE,
959 qp->qe_block, qp->qblock_dvma);
960 dma_free_coherent(&op->dev, sizeof(struct sunqe_buffers),
961 qp->buffers, qp->buffers_dvma);
962
963 free_netdev(net_dev);
964
965 dev_set_drvdata(&op->dev, NULL);
966
967 return 0;
968 }
969
970 static const struct of_device_id qec_sbus_match[] = {
971 {
972 .name = "qe",
973 },
974 {},
975 };
976
977 MODULE_DEVICE_TABLE(of, qec_sbus_match);
978
979 static struct platform_driver qec_sbus_driver = {
980 .driver = {
981 .name = "qec",
982 .owner = THIS_MODULE,
983 .of_match_table = qec_sbus_match,
984 },
985 .probe = qec_sbus_probe,
986 .remove = __devexit_p(qec_sbus_remove),
987 };
988
989 static int __init qec_init(void)
990 {
991 return platform_driver_register(&qec_sbus_driver);
992 }
993
994 static void __exit qec_exit(void)
995 {
996 platform_driver_unregister(&qec_sbus_driver);
997
998 while (root_qec_dev) {
999 struct sunqec *next = root_qec_dev->next_module;
1000 struct platform_device *op = root_qec_dev->op;
1001
1002 free_irq(op->archdata.irqs[0], (void *) root_qec_dev);
1003 of_iounmap(&op->resource[0], root_qec_dev->gregs,
1004 GLOB_REG_SIZE);
1005 kfree(root_qec_dev);
1006
1007 root_qec_dev = next;
1008 }
1009 }
1010
1011 module_init(qec_init);
1012 module_exit(qec_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree