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.
6 * Copyright (C) 1996, 1999, 2003, 2006 David S. Miller (davem@davemloft.net)
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>
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>
28 #include <asm/system.h>
31 #include <asm/byteorder.h>
32 #include <asm/idprom.h>
34 #include <asm/openprom.h>
35 #include <asm/oplib.h>
36 #include <asm/auxio.h>
37 #include <asm/pgtable.h>
42 #define DRV_NAME "sunqe"
43 #define DRV_VERSION "4.0"
44 #define DRV_RELDATE "June 23, 2006"
45 #define DRV_AUTHOR "David S. Miller (davem@davemloft.net)"
47 static char version[] =
48 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
50 MODULE_VERSION(DRV_VERSION);
51 MODULE_AUTHOR(DRV_AUTHOR);
52 MODULE_DESCRIPTION("Sun QuadEthernet 10baseT SBUS card driver");
53 MODULE_LICENSE("GPL");
55 static struct sunqec *root_qec_dev;
57 static void qe_set_multicast(struct net_device *dev);
59 #define QEC_RESET_TRIES 200
61 static inline int qec_global_reset(void __iomem *gregs)
63 int tries = QEC_RESET_TRIES;
65 sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL);
67 u32 tmp = sbus_readl(gregs + GLOB_CTRL);
68 if (tmp & GLOB_CTRL_RESET) {
76 printk(KERN_ERR "QuadEther: AIEEE cannot reset the QEC!\n");
80 #define MACE_RESET_RETRIES 200
81 #define QE_RESET_RETRIES 200
83 static inline int qe_stop(struct sunqe *qep)
85 void __iomem *cregs = qep->qcregs;
86 void __iomem *mregs = qep->mregs;
89 /* Reset the MACE, then the QEC channel. */
90 sbus_writeb(MREGS_BCONFIG_RESET, mregs + MREGS_BCONFIG);
91 tries = MACE_RESET_RETRIES;
93 u8 tmp = sbus_readb(mregs + MREGS_BCONFIG);
94 if (tmp & MREGS_BCONFIG_RESET) {
101 printk(KERN_ERR "QuadEther: AIEEE cannot reset the MACE!\n");
105 sbus_writel(CREG_CTRL_RESET, cregs + CREG_CTRL);
106 tries = QE_RESET_RETRIES;
108 u32 tmp = sbus_readl(cregs + CREG_CTRL);
109 if (tmp & CREG_CTRL_RESET) {
116 printk(KERN_ERR "QuadEther: Cannot reset QE channel!\n");
122 static void qe_init_rings(struct sunqe *qep)
124 struct qe_init_block *qb = qep->qe_block;
125 struct sunqe_buffers *qbufs = qep->buffers;
126 __u32 qbufs_dvma = qep->buffers_dvma;
129 qep->rx_new = qep->rx_old = qep->tx_new = qep->tx_old = 0;
130 memset(qb, 0, sizeof(struct qe_init_block));
131 memset(qbufs, 0, sizeof(struct sunqe_buffers));
132 for (i = 0; i < RX_RING_SIZE; i++) {
133 qb->qe_rxd[i].rx_addr = qbufs_dvma + qebuf_offset(rx_buf, i);
134 qb->qe_rxd[i].rx_flags =
135 (RXD_OWN | ((RXD_PKT_SZ) & RXD_LENGTH));
139 static int qe_init(struct sunqe *qep, int from_irq)
141 struct sunqec *qecp = qep->parent;
142 void __iomem *cregs = qep->qcregs;
143 void __iomem *mregs = qep->mregs;
144 void __iomem *gregs = qecp->gregs;
145 unsigned char *e = &qep->dev->dev_addr[0];
153 /* Setup initial rx/tx init block pointers. */
154 sbus_writel(qep->qblock_dvma + qib_offset(qe_rxd, 0), cregs + CREG_RXDS);
155 sbus_writel(qep->qblock_dvma + qib_offset(qe_txd, 0), cregs + CREG_TXDS);
157 /* Enable/mask the various irq's. */
158 sbus_writel(0, cregs + CREG_RIMASK);
159 sbus_writel(1, cregs + CREG_TIMASK);
161 sbus_writel(0, cregs + CREG_QMASK);
162 sbus_writel(CREG_MMASK_RXCOLL, cregs + CREG_MMASK);
164 /* Setup the FIFO pointers into QEC local memory. */
165 tmp = qep->channel * sbus_readl(gregs + GLOB_MSIZE);
166 sbus_writel(tmp, cregs + CREG_RXRBUFPTR);
167 sbus_writel(tmp, cregs + CREG_RXWBUFPTR);
169 tmp = sbus_readl(cregs + CREG_RXRBUFPTR) +
170 sbus_readl(gregs + GLOB_RSIZE);
171 sbus_writel(tmp, cregs + CREG_TXRBUFPTR);
172 sbus_writel(tmp, cregs + CREG_TXWBUFPTR);
174 /* Clear the channel collision counter. */
175 sbus_writel(0, cregs + CREG_CCNT);
177 /* For 10baseT, inter frame space nor throttle seems to be necessary. */
178 sbus_writel(0, cregs + CREG_PIPG);
180 /* Now dork with the AMD MACE. */
181 sbus_writeb(MREGS_PHYCONFIG_AUTO, mregs + MREGS_PHYCONFIG);
182 sbus_writeb(MREGS_TXFCNTL_AUTOPAD, mregs + MREGS_TXFCNTL);
183 sbus_writeb(0, mregs + MREGS_RXFCNTL);
185 /* The QEC dma's the rx'd packets from local memory out to main memory,
186 * and therefore it interrupts when the packet reception is "complete".
187 * So don't listen for the MACE talking about it.
189 sbus_writeb(MREGS_IMASK_COLL | MREGS_IMASK_RXIRQ, mregs + MREGS_IMASK);
190 sbus_writeb(MREGS_BCONFIG_BSWAP | MREGS_BCONFIG_64TS, mregs + MREGS_BCONFIG);
191 sbus_writeb((MREGS_FCONFIG_TXF16 | MREGS_FCONFIG_RXF32 |
192 MREGS_FCONFIG_RFWU | MREGS_FCONFIG_TFWU),
193 mregs + MREGS_FCONFIG);
195 /* Only usable interface on QuadEther is twisted pair. */
196 sbus_writeb(MREGS_PLSCONFIG_TP, mregs + MREGS_PLSCONFIG);
198 /* Tell MACE we are changing the ether address. */
199 sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_PARESET,
200 mregs + MREGS_IACONFIG);
201 while ((sbus_readb(mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0)
203 sbus_writeb(e[0], mregs + MREGS_ETHADDR);
204 sbus_writeb(e[1], mregs + MREGS_ETHADDR);
205 sbus_writeb(e[2], mregs + MREGS_ETHADDR);
206 sbus_writeb(e[3], mregs + MREGS_ETHADDR);
207 sbus_writeb(e[4], mregs + MREGS_ETHADDR);
208 sbus_writeb(e[5], mregs + MREGS_ETHADDR);
210 /* Clear out the address filter. */
211 sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET,
212 mregs + MREGS_IACONFIG);
213 while ((sbus_readb(mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0)
215 for (i = 0; i < 8; i++)
216 sbus_writeb(0, mregs + MREGS_FILTER);
218 /* Address changes are now complete. */
219 sbus_writeb(0, mregs + MREGS_IACONFIG);
223 /* Wait a little bit for the link to come up... */
225 if (!(sbus_readb(mregs + MREGS_PHYCONFIG) & MREGS_PHYCONFIG_LTESTDIS)) {
233 tmp = sbus_readb(mregs + MREGS_PHYCONFIG);
234 if ((tmp & MREGS_PHYCONFIG_LSTAT) != 0)
238 printk(KERN_NOTICE "%s: Warning, link state is down.\n", qep->dev->name);
241 /* Missed packet counter is cleared on a read. */
242 sbus_readb(mregs + MREGS_MPCNT);
244 /* Reload multicast information, this will enable the receiver
247 qe_set_multicast(qep->dev);
249 /* QEC should now start to show interrupts. */
253 /* Grrr, certain error conditions completely lock up the AMD MACE,
254 * so when we get these we _must_ reset the chip.
256 static int qe_is_bolixed(struct sunqe *qep, u32 qe_status)
258 struct net_device *dev = qep->dev;
259 int mace_hwbug_workaround = 0;
261 if (qe_status & CREG_STAT_EDEFER) {
262 printk(KERN_ERR "%s: Excessive transmit defers.\n", dev->name);
263 qep->net_stats.tx_errors++;
266 if (qe_status & CREG_STAT_CLOSS) {
267 printk(KERN_ERR "%s: Carrier lost, link down?\n", dev->name);
268 qep->net_stats.tx_errors++;
269 qep->net_stats.tx_carrier_errors++;
272 if (qe_status & CREG_STAT_ERETRIES) {
273 printk(KERN_ERR "%s: Excessive transmit retries (more than 16).\n", dev->name);
274 qep->net_stats.tx_errors++;
275 mace_hwbug_workaround = 1;
278 if (qe_status & CREG_STAT_LCOLL) {
279 printk(KERN_ERR "%s: Late transmit collision.\n", dev->name);
280 qep->net_stats.tx_errors++;
281 qep->net_stats.collisions++;
282 mace_hwbug_workaround = 1;
285 if (qe_status & CREG_STAT_FUFLOW) {
286 printk(KERN_ERR "%s: Transmit fifo underflow, driver bug.\n", dev->name);
287 qep->net_stats.tx_errors++;
288 mace_hwbug_workaround = 1;
291 if (qe_status & CREG_STAT_JERROR) {
292 printk(KERN_ERR "%s: Jabber error.\n", dev->name);
295 if (qe_status & CREG_STAT_BERROR) {
296 printk(KERN_ERR "%s: Babble error.\n", dev->name);
299 if (qe_status & CREG_STAT_CCOFLOW) {
300 qep->net_stats.tx_errors += 256;
301 qep->net_stats.collisions += 256;
304 if (qe_status & CREG_STAT_TXDERROR) {
305 printk(KERN_ERR "%s: Transmit descriptor is bogus, driver bug.\n", dev->name);
306 qep->net_stats.tx_errors++;
307 qep->net_stats.tx_aborted_errors++;
308 mace_hwbug_workaround = 1;
311 if (qe_status & CREG_STAT_TXLERR) {
312 printk(KERN_ERR "%s: Transmit late error.\n", dev->name);
313 qep->net_stats.tx_errors++;
314 mace_hwbug_workaround = 1;
317 if (qe_status & CREG_STAT_TXPERR) {
318 printk(KERN_ERR "%s: Transmit DMA parity error.\n", dev->name);
319 qep->net_stats.tx_errors++;
320 qep->net_stats.tx_aborted_errors++;
321 mace_hwbug_workaround = 1;
324 if (qe_status & CREG_STAT_TXSERR) {
325 printk(KERN_ERR "%s: Transmit DMA sbus error ack.\n", dev->name);
326 qep->net_stats.tx_errors++;
327 qep->net_stats.tx_aborted_errors++;
328 mace_hwbug_workaround = 1;
331 if (qe_status & CREG_STAT_RCCOFLOW) {
332 qep->net_stats.rx_errors += 256;
333 qep->net_stats.collisions += 256;
336 if (qe_status & CREG_STAT_RUOFLOW) {
337 qep->net_stats.rx_errors += 256;
338 qep->net_stats.rx_over_errors += 256;
341 if (qe_status & CREG_STAT_MCOFLOW) {
342 qep->net_stats.rx_errors += 256;
343 qep->net_stats.rx_missed_errors += 256;
346 if (qe_status & CREG_STAT_RXFOFLOW) {
347 printk(KERN_ERR "%s: Receive fifo overflow.\n", dev->name);
348 qep->net_stats.rx_errors++;
349 qep->net_stats.rx_over_errors++;
352 if (qe_status & CREG_STAT_RLCOLL) {
353 printk(KERN_ERR "%s: Late receive collision.\n", dev->name);
354 qep->net_stats.rx_errors++;
355 qep->net_stats.collisions++;
358 if (qe_status & CREG_STAT_FCOFLOW) {
359 qep->net_stats.rx_errors += 256;
360 qep->net_stats.rx_frame_errors += 256;
363 if (qe_status & CREG_STAT_CECOFLOW) {
364 qep->net_stats.rx_errors += 256;
365 qep->net_stats.rx_crc_errors += 256;
368 if (qe_status & CREG_STAT_RXDROP) {
369 printk(KERN_ERR "%s: Receive packet dropped.\n", dev->name);
370 qep->net_stats.rx_errors++;
371 qep->net_stats.rx_dropped++;
372 qep->net_stats.rx_missed_errors++;
375 if (qe_status & CREG_STAT_RXSMALL) {
376 printk(KERN_ERR "%s: Receive buffer too small, driver bug.\n", dev->name);
377 qep->net_stats.rx_errors++;
378 qep->net_stats.rx_length_errors++;
381 if (qe_status & CREG_STAT_RXLERR) {
382 printk(KERN_ERR "%s: Receive late error.\n", dev->name);
383 qep->net_stats.rx_errors++;
384 mace_hwbug_workaround = 1;
387 if (qe_status & CREG_STAT_RXPERR) {
388 printk(KERN_ERR "%s: Receive DMA parity error.\n", dev->name);
389 qep->net_stats.rx_errors++;
390 qep->net_stats.rx_missed_errors++;
391 mace_hwbug_workaround = 1;
394 if (qe_status & CREG_STAT_RXSERR) {
395 printk(KERN_ERR "%s: Receive DMA sbus error ack.\n", dev->name);
396 qep->net_stats.rx_errors++;
397 qep->net_stats.rx_missed_errors++;
398 mace_hwbug_workaround = 1;
401 if (mace_hwbug_workaround)
403 return mace_hwbug_workaround;
406 /* Per-QE receive interrupt service routine. Just like on the happy meal
407 * we receive directly into skb's with a small packet copy water mark.
409 static void qe_rx(struct sunqe *qep)
411 struct qe_rxd *rxbase = &qep->qe_block->qe_rxd[0];
413 struct sunqe_buffers *qbufs = qep->buffers;
414 __u32 qbufs_dvma = qep->buffers_dvma;
415 int elem = qep->rx_new, drops = 0;
418 this = &rxbase[elem];
419 while (!((flags = this->rx_flags) & RXD_OWN)) {
421 unsigned char *this_qbuf =
422 &qbufs->rx_buf[elem & (RX_RING_SIZE - 1)][0];
423 __u32 this_qbuf_dvma = qbufs_dvma +
424 qebuf_offset(rx_buf, (elem & (RX_RING_SIZE - 1)));
425 struct qe_rxd *end_rxd =
426 &rxbase[(elem+RX_RING_SIZE)&(RX_RING_MAXSIZE-1)];
427 int len = (flags & RXD_LENGTH) - 4; /* QE adds ether FCS size to len */
429 /* Check for errors. */
430 if (len < ETH_ZLEN) {
431 qep->net_stats.rx_errors++;
432 qep->net_stats.rx_length_errors++;
433 qep->net_stats.rx_dropped++;
435 skb = dev_alloc_skb(len + 2);
438 qep->net_stats.rx_dropped++;
443 eth_copy_and_sum(skb, (unsigned char *) this_qbuf,
445 skb->protocol = eth_type_trans(skb, qep->dev);
447 qep->dev->last_rx = jiffies;
448 qep->net_stats.rx_packets++;
449 qep->net_stats.rx_bytes += len;
452 end_rxd->rx_addr = this_qbuf_dvma;
453 end_rxd->rx_flags = (RXD_OWN | ((RXD_PKT_SZ) & RXD_LENGTH));
455 elem = NEXT_RX(elem);
456 this = &rxbase[elem];
460 printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", qep->dev->name);
463 static void qe_tx_reclaim(struct sunqe *qep);
465 /* Interrupts for all QE's get filtered out via the QEC master controller,
466 * so we just run through each qe and check to see who is signaling
467 * and thus needs to be serviced.
469 static irqreturn_t qec_interrupt(int irq, void *dev_id)
471 struct sunqec *qecp = dev_id;
475 /* Latch the status now. */
476 qec_status = sbus_readl(qecp->gregs + GLOB_STAT);
477 while (channel < 4) {
478 if (qec_status & 0xf) {
479 struct sunqe *qep = qecp->qes[channel];
482 qe_status = sbus_readl(qep->qcregs + CREG_STAT);
483 if (qe_status & CREG_STAT_ERRORS) {
484 if (qe_is_bolixed(qep, qe_status))
487 if (qe_status & CREG_STAT_RXIRQ)
489 if (netif_queue_stopped(qep->dev) &&
490 (qe_status & CREG_STAT_TXIRQ)) {
491 spin_lock(&qep->lock);
493 if (TX_BUFFS_AVAIL(qep) > 0) {
494 /* Wake net queue and return to
497 netif_wake_queue(qep->dev);
498 sbus_writel(1, qep->qcregs + CREG_TIMASK);
500 spin_unlock(&qep->lock);
512 static int qe_open(struct net_device *dev)
514 struct sunqe *qep = (struct sunqe *) dev->priv;
516 qep->mconfig = (MREGS_MCONFIG_TXENAB |
517 MREGS_MCONFIG_RXENAB |
518 MREGS_MCONFIG_MBAENAB);
519 return qe_init(qep, 0);
522 static int qe_close(struct net_device *dev)
524 struct sunqe *qep = (struct sunqe *) dev->priv;
530 /* Reclaim TX'd frames from the ring. This must always run under
531 * the IRQ protected qep->lock.
533 static void qe_tx_reclaim(struct sunqe *qep)
535 struct qe_txd *txbase = &qep->qe_block->qe_txd[0];
536 int elem = qep->tx_old;
538 while (elem != qep->tx_new) {
539 u32 flags = txbase[elem].tx_flags;
543 elem = NEXT_TX(elem);
548 static void qe_tx_timeout(struct net_device *dev)
550 struct sunqe *qep = (struct sunqe *) dev->priv;
553 spin_lock_irq(&qep->lock);
555 /* Try to reclaim, if that frees up some tx
556 * entries, we're fine.
559 tx_full = TX_BUFFS_AVAIL(qep) <= 0;
561 spin_unlock_irq(&qep->lock);
566 printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
570 netif_wake_queue(dev);
573 /* Get a packet queued to go onto the wire. */
574 static int qe_start_xmit(struct sk_buff *skb, struct net_device *dev)
576 struct sunqe *qep = (struct sunqe *) dev->priv;
577 struct sunqe_buffers *qbufs = qep->buffers;
578 __u32 txbuf_dvma, qbufs_dvma = qep->buffers_dvma;
579 unsigned char *txbuf;
582 spin_lock_irq(&qep->lock);
589 txbuf = &qbufs->tx_buf[entry & (TX_RING_SIZE - 1)][0];
590 txbuf_dvma = qbufs_dvma +
591 qebuf_offset(tx_buf, (entry & (TX_RING_SIZE - 1)));
593 /* Avoid a race... */
594 qep->qe_block->qe_txd[entry].tx_flags = TXD_UPDATE;
596 memcpy(txbuf, skb->data, len);
598 qep->qe_block->qe_txd[entry].tx_addr = txbuf_dvma;
599 qep->qe_block->qe_txd[entry].tx_flags =
600 (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
601 qep->tx_new = NEXT_TX(entry);
604 dev->trans_start = jiffies;
605 sbus_writel(CREG_CTRL_TWAKEUP, qep->qcregs + CREG_CTRL);
607 qep->net_stats.tx_packets++;
608 qep->net_stats.tx_bytes += len;
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.
616 netif_stop_queue(dev);
617 sbus_writel(0, qep->qcregs + CREG_TIMASK);
619 spin_unlock_irq(&qep->lock);
626 static struct net_device_stats *qe_get_stats(struct net_device *dev)
628 struct sunqe *qep = (struct sunqe *) dev->priv;
630 return &qep->net_stats;
633 static void qe_set_multicast(struct net_device *dev)
635 struct sunqe *qep = (struct sunqe *) dev->priv;
636 struct dev_mc_list *dmi = dev->mc_list;
637 u8 new_mconfig = qep->mconfig;
642 /* Lock out others. */
643 netif_stop_queue(dev);
645 if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
646 sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET,
647 qep->mregs + MREGS_IACONFIG);
648 while ((sbus_readb(qep->mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0)
650 for (i = 0; i < 8; i++)
651 sbus_writeb(0xff, qep->mregs + MREGS_FILTER);
652 sbus_writeb(0, qep->mregs + MREGS_IACONFIG);
653 } else if (dev->flags & IFF_PROMISC) {
654 new_mconfig |= MREGS_MCONFIG_PROMISC;
657 u8 *hbytes = (unsigned char *) &hash_table[0];
659 for (i = 0; i < 4; i++)
662 for (i = 0; i < dev->mc_count; i++) {
663 addrs = dmi->dmi_addr;
668 crc = ether_crc_le(6, addrs);
670 hash_table[crc >> 4] |= 1 << (crc & 0xf);
672 /* Program the qe with the new filter value. */
673 sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET,
674 qep->mregs + MREGS_IACONFIG);
675 while ((sbus_readb(qep->mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0)
677 for (i = 0; i < 8; i++) {
679 sbus_writeb(tmp, qep->mregs + MREGS_FILTER);
681 sbus_writeb(0, qep->mregs + MREGS_IACONFIG);
684 /* Any change of the logical address filter, the physical address,
685 * or enabling/disabling promiscuous mode causes the MACE to disable
686 * the receiver. So we must re-enable them here or else the MACE
687 * refuses to listen to anything on the network. Sheesh, took
688 * me a day or two to find this bug.
690 qep->mconfig = new_mconfig;
691 sbus_writeb(qep->mconfig, qep->mregs + MREGS_MCONFIG);
693 /* Let us get going again. */
694 netif_wake_queue(dev);
697 /* Ethtool support... */
698 static void qe_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
700 struct sunqe *qep = dev->priv;
702 strcpy(info->driver, "sunqe");
703 strcpy(info->version, "3.0");
704 sprintf(info->bus_info, "SBUS:%d",
708 static u32 qe_get_link(struct net_device *dev)
710 struct sunqe *qep = dev->priv;
711 void __iomem *mregs = qep->mregs;
714 spin_lock_irq(&qep->lock);
715 phyconfig = sbus_readb(mregs + MREGS_PHYCONFIG);
716 spin_unlock_irq(&qep->lock);
718 return (phyconfig & MREGS_PHYCONFIG_LSTAT);
721 static const struct ethtool_ops qe_ethtool_ops = {
722 .get_drvinfo = qe_get_drvinfo,
723 .get_link = qe_get_link,
726 /* This is only called once at boot time for each card probed. */
727 static inline void qec_init_once(struct sunqec *qecp, struct sbus_dev *qsdev)
729 u8 bsizes = qecp->qec_bursts;
731 if (sbus_can_burst64(qsdev) && (bsizes & DMA_BURST64)) {
732 sbus_writel(GLOB_CTRL_B64, qecp->gregs + GLOB_CTRL);
733 } else if (bsizes & DMA_BURST32) {
734 sbus_writel(GLOB_CTRL_B32, qecp->gregs + GLOB_CTRL);
736 sbus_writel(GLOB_CTRL_B16, qecp->gregs + GLOB_CTRL);
739 /* Packetsize only used in 100baseT BigMAC configurations,
740 * set it to zero just to be on the safe side.
742 sbus_writel(GLOB_PSIZE_2048, qecp->gregs + GLOB_PSIZE);
744 /* Set the local memsize register, divided up to one piece per QE channel. */
745 sbus_writel((qsdev->reg_addrs[1].reg_size >> 2),
746 qecp->gregs + GLOB_MSIZE);
748 /* Divide up the local QEC memory amongst the 4 QE receiver and
749 * transmitter FIFOs. Basically it is (total / 2 / num_channels).
751 sbus_writel((qsdev->reg_addrs[1].reg_size >> 2) >> 1,
752 qecp->gregs + GLOB_TSIZE);
753 sbus_writel((qsdev->reg_addrs[1].reg_size >> 2) >> 1,
754 qecp->gregs + GLOB_RSIZE);
757 static u8 __init qec_get_burst(struct device_node *dp)
759 u8 bsizes, bsizes_more;
761 /* Find and set the burst sizes for the QEC, since it
762 * does the actual dma for all 4 channels.
764 bsizes = of_getintprop_default(dp, "burst-sizes", 0xff);
766 bsizes_more = of_getintprop_default(dp->parent, "burst-sizes", 0xff);
768 if (bsizes_more != 0xff)
769 bsizes &= bsizes_more;
770 if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
771 (bsizes & DMA_BURST32)==0)
772 bsizes = (DMA_BURST32 - 1);
777 static struct sunqec * __init get_qec(struct sbus_dev *child_sdev)
779 struct sbus_dev *qec_sdev = child_sdev->parent;
782 for (qecp = root_qec_dev; qecp; qecp = qecp->next_module) {
783 if (qecp->qec_sdev == qec_sdev)
787 qecp = kzalloc(sizeof(struct sunqec), GFP_KERNEL);
791 qecp->qec_sdev = qec_sdev;
792 qecp->gregs = sbus_ioremap(&qec_sdev->resource[0], 0,
794 "QEC Global Registers");
798 /* Make sure the QEC is in MACE mode. */
799 ctrl = sbus_readl(qecp->gregs + GLOB_CTRL);
801 if (ctrl != GLOB_CTRL_MMODE) {
802 printk(KERN_ERR "qec: Not in MACE mode!\n");
806 if (qec_global_reset(qecp->gregs))
809 qecp->qec_bursts = qec_get_burst(qec_sdev->ofdev.node);
811 qec_init_once(qecp, qec_sdev);
813 if (request_irq(qec_sdev->irqs[0], &qec_interrupt,
814 IRQF_SHARED, "qec", (void *) qecp)) {
815 printk(KERN_ERR "qec: Can't register irq.\n");
819 qecp->next_module = root_qec_dev;
828 sbus_iounmap(qecp->gregs, GLOB_REG_SIZE);
833 static int __init qec_ether_init(struct sbus_dev *sdev)
835 static unsigned version_printed;
836 struct net_device *dev;
841 if (version_printed++ == 0)
842 printk(KERN_INFO "%s", version);
844 dev = alloc_etherdev(sizeof(struct sunqe));
848 qe = netdev_priv(dev);
850 i = of_getintprop_default(sdev->ofdev.node, "channel#", -1);
852 struct sbus_dev *td = sdev->parent->child;
860 spin_lock_init(&qe->lock);
863 qecp = get_qec(sdev);
867 qecp->qes[qe->channel] = qe;
873 qe->qcregs = sbus_ioremap(&qe->qe_sdev->resource[0], 0,
874 CREG_REG_SIZE, "QEC Channel Registers");
876 printk(KERN_ERR "qe: Cannot map channel registers.\n");
880 qe->mregs = sbus_ioremap(&qe->qe_sdev->resource[1], 0,
881 MREGS_REG_SIZE, "QE MACE Registers");
883 printk(KERN_ERR "qe: Cannot map MACE registers.\n");
887 qe->qe_block = sbus_alloc_consistent(qe->qe_sdev,
890 qe->buffers = sbus_alloc_consistent(qe->qe_sdev,
891 sizeof(struct sunqe_buffers),
893 if (qe->qe_block == NULL || qe->qblock_dvma == 0 ||
894 qe->buffers == NULL || qe->buffers_dvma == 0)
900 SET_MODULE_OWNER(dev);
901 SET_NETDEV_DEV(dev, &sdev->ofdev.dev);
904 dev->stop = qe_close;
905 dev->hard_start_xmit = qe_start_xmit;
906 dev->get_stats = qe_get_stats;
907 dev->set_multicast_list = qe_set_multicast;
908 dev->tx_timeout = qe_tx_timeout;
909 dev->watchdog_timeo = 5*HZ;
910 dev->irq = sdev->irqs[0];
912 dev->ethtool_ops = &qe_ethtool_ops;
914 res = register_netdev(dev);
918 dev_set_drvdata(&sdev->ofdev.dev, qe);
920 printk(KERN_INFO "%s: qe channel[%d] ", dev->name, qe->channel);
921 for (i = 0; i < 6; i++)
932 sbus_iounmap(qe->qcregs, CREG_REG_SIZE);
934 sbus_iounmap(qe->mregs, MREGS_REG_SIZE);
936 sbus_free_consistent(qe->qe_sdev,
941 sbus_free_consistent(qe->qe_sdev,
942 sizeof(struct sunqe_buffers),
951 static int __devinit qec_sbus_probe(struct of_device *dev, const struct of_device_id *match)
953 struct sbus_dev *sdev = to_sbus_device(&dev->dev);
955 return qec_ether_init(sdev);
958 static int __devexit qec_sbus_remove(struct of_device *dev)
960 struct sunqe *qp = dev_get_drvdata(&dev->dev);
961 struct net_device *net_dev = qp->dev;
963 unregister_netdevice(net_dev);
965 sbus_iounmap(qp->qcregs, CREG_REG_SIZE);
966 sbus_iounmap(qp->mregs, MREGS_REG_SIZE);
967 sbus_free_consistent(qp->qe_sdev,
971 sbus_free_consistent(qp->qe_sdev,
972 sizeof(struct sunqe_buffers),
976 free_netdev(net_dev);
978 dev_set_drvdata(&dev->dev, NULL);
983 static struct of_device_id qec_sbus_match[] = {
990 MODULE_DEVICE_TABLE(of, qec_sbus_match);
992 static struct of_platform_driver qec_sbus_driver = {
994 .match_table = qec_sbus_match,
995 .probe = qec_sbus_probe,
996 .remove = __devexit_p(qec_sbus_remove),
999 static int __init qec_init(void)
1001 return of_register_driver(&qec_sbus_driver, &sbus_bus_type);
1004 static void __exit qec_exit(void)
1006 of_unregister_driver(&qec_sbus_driver);
1008 while (root_qec_dev) {
1009 struct sunqec *next = root_qec_dev->next_module;
1011 free_irq(root_qec_dev->qec_sdev->irqs[0],
1012 (void *) root_qec_dev);
1013 sbus_iounmap(root_qec_dev->gregs, GLOB_REG_SIZE);
1015 kfree(root_qec_dev);
1017 root_qec_dev = next;
1021 module_init(qec_init);
1022 module_exit(qec_exit);