3 * This is a driver for SMSC's 91C9x/91C1xx single-chip Ethernet devices.
5 * Copyright (C) 1996 by Erik Stahlman
6 * Copyright (C) 2001 Standard Microsystems Corporation
7 * Developed by Simple Network Magic Corporation
8 * Copyright (C) 2003 Monta Vista Software, Inc.
9 * Unified SMC91x driver by Nicolas Pitre
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 * io = for the base address
28 * nowait = 0 for normal wait states, 1 eliminates additional wait states
31 * Erik Stahlman <erik@vt.edu>
33 * hardware multicast code:
34 * Peter Cammaert <pc@denkart.be>
37 * Daris A Nevil <dnevil@snmc.com>
38 * Nicolas Pitre <nico@cam.org>
39 * Russell King <rmk@arm.linux.org.uk>
42 * 08/20/00 Arnaldo Melo fix kfree(skb) in smc_hardware_send_packet
43 * 12/15/00 Christian Jullien fix "Warning: kfree_skb on hard IRQ"
44 * 03/16/01 Daris A Nevil modified smc9194.c for use with LAN91C111
45 * 08/22/01 Scott Anderson merge changes from smc9194 to smc91111
46 * 08/21/01 Pramod B Bhardwaj added support for RevB of LAN91C111
47 * 12/20/01 Jeff Sutherland initial port to Xscale PXA with DMA support
48 * 04/07/03 Nicolas Pitre unified SMC91x driver, killed irq races,
49 * more bus abstraction, big cleanup, etc.
50 * 29/09/03 Russell King - add driver model support
52 * - convert to use generic MII interface
53 * - add link up/down notification
54 * - don't try to handle full negotiation in
56 * - clean up (and fix stack overrun) in PHY
57 * MII read/write functions
58 * 22/09/04 Nicolas Pitre big update (see commit log for details)
60 static const char version[] =
61 "smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <nico@cam.org>\n";
69 #include <linux/init.h>
70 #include <linux/module.h>
71 #include <linux/kernel.h>
72 #include <linux/sched.h>
73 #include <linux/slab.h>
74 #include <linux/delay.h>
75 #include <linux/interrupt.h>
76 #include <linux/errno.h>
77 #include <linux/ioport.h>
78 #include <linux/crc32.h>
79 #include <linux/platform_device.h>
80 #include <linux/spinlock.h>
81 #include <linux/ethtool.h>
82 #include <linux/mii.h>
83 #include <linux/workqueue.h>
85 #include <linux/netdevice.h>
86 #include <linux/etherdevice.h>
87 #include <linux/skbuff.h>
95 * the LAN91C111 can be at any of the following port addresses. To change,
96 * for a slightly different card, you can add it to the array. Keep in
97 * mind that the array must end in zero.
99 static unsigned int smc_portlist[] __initdata = {
100 0x200, 0x220, 0x240, 0x260, 0x280, 0x2A0, 0x2C0, 0x2E0,
101 0x300, 0x320, 0x340, 0x360, 0x380, 0x3A0, 0x3C0, 0x3E0, 0
105 # define SMC_IOADDR -1
107 static unsigned long io = SMC_IOADDR;
108 module_param(io, ulong, 0400);
109 MODULE_PARM_DESC(io, "I/O base address");
114 static int irq = SMC_IRQ;
115 module_param(irq, int, 0400);
116 MODULE_PARM_DESC(irq, "IRQ number");
118 #endif /* CONFIG_ISA */
121 # define SMC_NOWAIT 0
123 static int nowait = SMC_NOWAIT;
124 module_param(nowait, int, 0400);
125 MODULE_PARM_DESC(nowait, "set to 1 for no wait state");
128 * Transmit timeout, default 5 seconds.
130 static int watchdog = 1000;
131 module_param(watchdog, int, 0400);
132 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
134 MODULE_LICENSE("GPL");
137 * The internal workings of the driver. If you are changing anything
138 * here with the SMC stuff, you should have the datasheet and know
139 * what you are doing.
141 #define CARDNAME "smc91x"
144 * Use power-down feature of the chip
149 * Wait time for memory to be free. This probably shouldn't be
150 * tuned that much, as waiting for this means nothing else happens
153 #define MEMORY_WAIT_TIME 16
156 * The maximum number of processing loops allowed for each call to the
159 #define MAX_IRQ_LOOPS 8
162 * This selects whether TX packets are sent one by one to the SMC91x internal
163 * memory and throttled until transmission completes. This may prevent
164 * RX overruns a litle by keeping much of the memory free for RX packets
165 * but to the expense of reduced TX throughput and increased IRQ overhead.
166 * Note this is not a cure for a too slow data bus or too high IRQ latency.
168 #define THROTTLE_TX_PKTS 0
171 * The MII clock high/low times. 2x this number gives the MII clock period
172 * in microseconds. (was 50, but this gives 6.4ms for each MII transaction!)
177 #define DBG(n, args...) \
179 if (SMC_DEBUG >= (n)) \
183 #define PRINTK(args...) printk(args)
185 #define DBG(n, args...) do { } while(0)
186 #define PRINTK(args...) printk(KERN_DEBUG args)
190 static void PRINT_PKT(u_char *buf, int length)
197 remainder = length % 16;
199 for (i = 0; i < lines ; i ++) {
201 for (cur = 0; cur < 8; cur++) {
205 printk("%02x%02x ", a, b);
209 for (i = 0; i < remainder/2 ; i++) {
213 printk("%02x%02x ", a, b);
218 #define PRINT_PKT(x...) do { } while(0)
222 /* this enables an interrupt in the interrupt mask register */
223 #define SMC_ENABLE_INT(lp, x) do { \
224 unsigned char mask; \
225 spin_lock_irq(&lp->lock); \
226 mask = SMC_GET_INT_MASK(lp); \
228 SMC_SET_INT_MASK(lp, mask); \
229 spin_unlock_irq(&lp->lock); \
232 /* this disables an interrupt from the interrupt mask register */
233 #define SMC_DISABLE_INT(lp, x) do { \
234 unsigned char mask; \
235 spin_lock_irq(&lp->lock); \
236 mask = SMC_GET_INT_MASK(lp); \
238 SMC_SET_INT_MASK(lp, mask); \
239 spin_unlock_irq(&lp->lock); \
243 * Wait while MMU is busy. This is usually in the order of a few nanosecs
244 * if at all, but let's avoid deadlocking the system if the hardware
245 * decides to go south.
247 #define SMC_WAIT_MMU_BUSY(lp) do { \
248 if (unlikely(SMC_GET_MMU_CMD(lp) & MC_BUSY)) { \
249 unsigned long timeout = jiffies + 2; \
250 while (SMC_GET_MMU_CMD(lp) & MC_BUSY) { \
251 if (time_after(jiffies, timeout)) { \
252 printk("%s: timeout %s line %d\n", \
253 dev->name, __FILE__, __LINE__); \
263 * this does a soft reset on the device
265 static void smc_reset(struct net_device *dev)
267 struct smc_local *lp = netdev_priv(dev);
268 void __iomem *ioaddr = lp->base;
269 unsigned int ctl, cfg;
270 struct sk_buff *pending_skb;
272 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
274 /* Disable all interrupts, block TX tasklet */
275 spin_lock_irq(&lp->lock);
276 SMC_SELECT_BANK(lp, 2);
277 SMC_SET_INT_MASK(lp, 0);
278 pending_skb = lp->pending_tx_skb;
279 lp->pending_tx_skb = NULL;
280 spin_unlock_irq(&lp->lock);
282 /* free any pending tx skb */
284 dev_kfree_skb(pending_skb);
285 dev->stats.tx_errors++;
286 dev->stats.tx_aborted_errors++;
290 * This resets the registers mostly to defaults, but doesn't
291 * affect EEPROM. That seems unnecessary
293 SMC_SELECT_BANK(lp, 0);
294 SMC_SET_RCR(lp, RCR_SOFTRST);
297 * Setup the Configuration Register
298 * This is necessary because the CONFIG_REG is not affected
301 SMC_SELECT_BANK(lp, 1);
303 cfg = CONFIG_DEFAULT;
306 * Setup for fast accesses if requested. If the card/system
307 * can't handle it then there will be no recovery except for
308 * a hard reset or power cycle
311 cfg |= CONFIG_NO_WAIT;
314 * Release from possible power-down state
315 * Configuration register is not affected by Soft Reset
317 cfg |= CONFIG_EPH_POWER_EN;
319 SMC_SET_CONFIG(lp, cfg);
321 /* this should pause enough for the chip to be happy */
323 * elaborate? What does the chip _need_? --jgarzik
325 * This seems to be undocumented, but something the original
326 * driver(s) have always done. Suspect undocumented timing
327 * info/determined empirically. --rmk
331 /* Disable transmit and receive functionality */
332 SMC_SELECT_BANK(lp, 0);
333 SMC_SET_RCR(lp, RCR_CLEAR);
334 SMC_SET_TCR(lp, TCR_CLEAR);
336 SMC_SELECT_BANK(lp, 1);
337 ctl = SMC_GET_CTL(lp) | CTL_LE_ENABLE;
340 * Set the control register to automatically release successfully
341 * transmitted packets, to make the best use out of our limited
344 if(!THROTTLE_TX_PKTS)
345 ctl |= CTL_AUTO_RELEASE;
347 ctl &= ~CTL_AUTO_RELEASE;
348 SMC_SET_CTL(lp, ctl);
351 SMC_SELECT_BANK(lp, 2);
352 SMC_SET_MMU_CMD(lp, MC_RESET);
353 SMC_WAIT_MMU_BUSY(lp);
357 * Enable Interrupts, Receive, and Transmit
359 static void smc_enable(struct net_device *dev)
361 struct smc_local *lp = netdev_priv(dev);
362 void __iomem *ioaddr = lp->base;
365 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
367 /* see the header file for options in TCR/RCR DEFAULT */
368 SMC_SELECT_BANK(lp, 0);
369 SMC_SET_TCR(lp, lp->tcr_cur_mode);
370 SMC_SET_RCR(lp, lp->rcr_cur_mode);
372 SMC_SELECT_BANK(lp, 1);
373 SMC_SET_MAC_ADDR(lp, dev->dev_addr);
375 /* now, enable interrupts */
376 mask = IM_EPH_INT|IM_RX_OVRN_INT|IM_RCV_INT;
377 if (lp->version >= (CHIP_91100 << 4))
379 SMC_SELECT_BANK(lp, 2);
380 SMC_SET_INT_MASK(lp, mask);
383 * From this point the register bank must _NOT_ be switched away
384 * to something else than bank 2 without proper locking against
385 * races with any tasklet or interrupt handlers until smc_shutdown()
386 * or smc_reset() is called.
391 * this puts the device in an inactive state
393 static void smc_shutdown(struct net_device *dev)
395 struct smc_local *lp = netdev_priv(dev);
396 void __iomem *ioaddr = lp->base;
397 struct sk_buff *pending_skb;
399 DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__);
401 /* no more interrupts for me */
402 spin_lock_irq(&lp->lock);
403 SMC_SELECT_BANK(lp, 2);
404 SMC_SET_INT_MASK(lp, 0);
405 pending_skb = lp->pending_tx_skb;
406 lp->pending_tx_skb = NULL;
407 spin_unlock_irq(&lp->lock);
409 dev_kfree_skb(pending_skb);
411 /* and tell the card to stay away from that nasty outside world */
412 SMC_SELECT_BANK(lp, 0);
413 SMC_SET_RCR(lp, RCR_CLEAR);
414 SMC_SET_TCR(lp, TCR_CLEAR);
417 /* finally, shut the chip down */
418 SMC_SELECT_BANK(lp, 1);
419 SMC_SET_CONFIG(lp, SMC_GET_CONFIG(lp) & ~CONFIG_EPH_POWER_EN);
424 * This is the procedure to handle the receipt of a packet.
426 static inline void smc_rcv(struct net_device *dev)
428 struct smc_local *lp = netdev_priv(dev);
429 void __iomem *ioaddr = lp->base;
430 unsigned int packet_number, status, packet_len;
432 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
434 packet_number = SMC_GET_RXFIFO(lp);
435 if (unlikely(packet_number & RXFIFO_REMPTY)) {
436 PRINTK("%s: smc_rcv with nothing on FIFO.\n", dev->name);
440 /* read from start of packet */
441 SMC_SET_PTR(lp, PTR_READ | PTR_RCV | PTR_AUTOINC);
443 /* First two words are status and packet length */
444 SMC_GET_PKT_HDR(lp, status, packet_len);
445 packet_len &= 0x07ff; /* mask off top bits */
446 DBG(2, "%s: RX PNR 0x%x STATUS 0x%04x LENGTH 0x%04x (%d)\n",
447 dev->name, packet_number, status,
448 packet_len, packet_len);
451 if (unlikely(packet_len < 6 || status & RS_ERRORS)) {
452 if (status & RS_TOOLONG && packet_len <= (1514 + 4 + 6)) {
453 /* accept VLAN packets */
454 status &= ~RS_TOOLONG;
457 if (packet_len < 6) {
458 /* bloody hardware */
459 printk(KERN_ERR "%s: fubar (rxlen %u status %x\n",
460 dev->name, packet_len, status);
461 status |= RS_TOOSHORT;
463 SMC_WAIT_MMU_BUSY(lp);
464 SMC_SET_MMU_CMD(lp, MC_RELEASE);
465 dev->stats.rx_errors++;
466 if (status & RS_ALGNERR)
467 dev->stats.rx_frame_errors++;
468 if (status & (RS_TOOSHORT | RS_TOOLONG))
469 dev->stats.rx_length_errors++;
470 if (status & RS_BADCRC)
471 dev->stats.rx_crc_errors++;
475 unsigned int data_len;
477 /* set multicast stats */
478 if (status & RS_MULTICAST)
479 dev->stats.multicast++;
482 * Actual payload is packet_len - 6 (or 5 if odd byte).
483 * We want skb_reserve(2) and the final ctrl word
484 * (2 bytes, possibly containing the payload odd byte).
485 * Furthermore, we add 2 bytes to allow rounding up to
486 * multiple of 4 bytes on 32 bit buses.
487 * Hence packet_len - 6 + 2 + 2 + 2.
489 skb = dev_alloc_skb(packet_len);
490 if (unlikely(skb == NULL)) {
491 printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
493 SMC_WAIT_MMU_BUSY(lp);
494 SMC_SET_MMU_CMD(lp, MC_RELEASE);
495 dev->stats.rx_dropped++;
499 /* Align IP header to 32 bits */
502 /* BUG: the LAN91C111 rev A never sets this bit. Force it. */
503 if (lp->version == 0x90)
504 status |= RS_ODDFRAME;
507 * If odd length: packet_len - 5,
508 * otherwise packet_len - 6.
509 * With the trailing ctrl byte it's packet_len - 4.
511 data_len = packet_len - ((status & RS_ODDFRAME) ? 5 : 6);
512 data = skb_put(skb, data_len);
513 SMC_PULL_DATA(lp, data, packet_len - 4);
515 SMC_WAIT_MMU_BUSY(lp);
516 SMC_SET_MMU_CMD(lp, MC_RELEASE);
518 PRINT_PKT(data, packet_len - 4);
520 dev->last_rx = jiffies;
521 skb->protocol = eth_type_trans(skb, dev);
523 dev->stats.rx_packets++;
524 dev->stats.rx_bytes += data_len;
530 * On SMP we have the following problem:
532 * A = smc_hardware_send_pkt()
533 * B = smc_hard_start_xmit()
534 * C = smc_interrupt()
536 * A and B can never be executed simultaneously. However, at least on UP,
537 * it is possible (and even desirable) for C to interrupt execution of
538 * A or B in order to have better RX reliability and avoid overruns.
539 * C, just like A and B, must have exclusive access to the chip and
540 * each of them must lock against any other concurrent access.
541 * Unfortunately this is not possible to have C suspend execution of A or
542 * B taking place on another CPU. On UP this is no an issue since A and B
543 * are run from softirq context and C from hard IRQ context, and there is
544 * no other CPU where concurrent access can happen.
545 * If ever there is a way to force at least B and C to always be executed
546 * on the same CPU then we could use read/write locks to protect against
547 * any other concurrent access and C would always interrupt B. But life
548 * isn't that easy in a SMP world...
550 #define smc_special_trylock(lock) \
553 local_irq_disable(); \
554 __ret = spin_trylock(lock); \
556 local_irq_enable(); \
559 #define smc_special_lock(lock) spin_lock_irq(lock)
560 #define smc_special_unlock(lock) spin_unlock_irq(lock)
562 #define smc_special_trylock(lock) (1)
563 #define smc_special_lock(lock) do { } while (0)
564 #define smc_special_unlock(lock) do { } while (0)
568 * This is called to actually send a packet to the chip.
570 static void smc_hardware_send_pkt(unsigned long data)
572 struct net_device *dev = (struct net_device *)data;
573 struct smc_local *lp = netdev_priv(dev);
574 void __iomem *ioaddr = lp->base;
576 unsigned int packet_no, len;
579 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
581 if (!smc_special_trylock(&lp->lock)) {
582 netif_stop_queue(dev);
583 tasklet_schedule(&lp->tx_task);
587 skb = lp->pending_tx_skb;
588 if (unlikely(!skb)) {
589 smc_special_unlock(&lp->lock);
592 lp->pending_tx_skb = NULL;
594 packet_no = SMC_GET_AR(lp);
595 if (unlikely(packet_no & AR_FAILED)) {
596 printk("%s: Memory allocation failed.\n", dev->name);
597 dev->stats.tx_errors++;
598 dev->stats.tx_fifo_errors++;
599 smc_special_unlock(&lp->lock);
603 /* point to the beginning of the packet */
604 SMC_SET_PN(lp, packet_no);
605 SMC_SET_PTR(lp, PTR_AUTOINC);
609 DBG(2, "%s: TX PNR 0x%x LENGTH 0x%04x (%d) BUF 0x%p\n",
610 dev->name, packet_no, len, len, buf);
614 * Send the packet length (+6 for status words, length, and ctl.
615 * The card will pad to 64 bytes with zeroes if packet is too small.
617 SMC_PUT_PKT_HDR(lp, 0, len + 6);
619 /* send the actual data */
620 SMC_PUSH_DATA(lp, buf, len & ~1);
622 /* Send final ctl word with the last byte if there is one */
623 SMC_outw(((len & 1) ? (0x2000 | buf[len-1]) : 0), ioaddr, DATA_REG(lp));
626 * If THROTTLE_TX_PKTS is set, we stop the queue here. This will
627 * have the effect of having at most one packet queued for TX
628 * in the chip's memory at all time.
630 * If THROTTLE_TX_PKTS is not set then the queue is stopped only
631 * when memory allocation (MC_ALLOC) does not succeed right away.
633 if (THROTTLE_TX_PKTS)
634 netif_stop_queue(dev);
636 /* queue the packet for TX */
637 SMC_SET_MMU_CMD(lp, MC_ENQUEUE);
638 smc_special_unlock(&lp->lock);
640 dev->trans_start = jiffies;
641 dev->stats.tx_packets++;
642 dev->stats.tx_bytes += len;
644 SMC_ENABLE_INT(lp, IM_TX_INT | IM_TX_EMPTY_INT);
646 done: if (!THROTTLE_TX_PKTS)
647 netif_wake_queue(dev);
653 * Since I am not sure if I will have enough room in the chip's ram
654 * to store the packet, I call this routine which either sends it
655 * now, or set the card to generates an interrupt when ready
658 static int smc_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
660 struct smc_local *lp = netdev_priv(dev);
661 void __iomem *ioaddr = lp->base;
662 unsigned int numPages, poll_count, status;
664 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
666 BUG_ON(lp->pending_tx_skb != NULL);
669 * The MMU wants the number of pages to be the number of 256 bytes
670 * 'pages', minus 1 (since a packet can't ever have 0 pages :))
672 * The 91C111 ignores the size bits, but earlier models don't.
674 * Pkt size for allocating is data length +6 (for additional status
675 * words, length and ctl)
677 * If odd size then last byte is included in ctl word.
679 numPages = ((skb->len & ~1) + (6 - 1)) >> 8;
680 if (unlikely(numPages > 7)) {
681 printk("%s: Far too big packet error.\n", dev->name);
682 dev->stats.tx_errors++;
683 dev->stats.tx_dropped++;
688 smc_special_lock(&lp->lock);
690 /* now, try to allocate the memory */
691 SMC_SET_MMU_CMD(lp, MC_ALLOC | numPages);
694 * Poll the chip for a short amount of time in case the
695 * allocation succeeds quickly.
697 poll_count = MEMORY_WAIT_TIME;
699 status = SMC_GET_INT(lp);
700 if (status & IM_ALLOC_INT) {
701 SMC_ACK_INT(lp, IM_ALLOC_INT);
704 } while (--poll_count);
706 smc_special_unlock(&lp->lock);
708 lp->pending_tx_skb = skb;
710 /* oh well, wait until the chip finds memory later */
711 netif_stop_queue(dev);
712 DBG(2, "%s: TX memory allocation deferred.\n", dev->name);
713 SMC_ENABLE_INT(lp, IM_ALLOC_INT);
716 * Allocation succeeded: push packet to the chip's own memory
719 smc_hardware_send_pkt((unsigned long)dev);
726 * This handles a TX interrupt, which is only called when:
727 * - a TX error occurred, or
728 * - CTL_AUTO_RELEASE is not set and TX of a packet completed.
730 static void smc_tx(struct net_device *dev)
732 struct smc_local *lp = netdev_priv(dev);
733 void __iomem *ioaddr = lp->base;
734 unsigned int saved_packet, packet_no, tx_status, pkt_len;
736 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
738 /* If the TX FIFO is empty then nothing to do */
739 packet_no = SMC_GET_TXFIFO(lp);
740 if (unlikely(packet_no & TXFIFO_TEMPTY)) {
741 PRINTK("%s: smc_tx with nothing on FIFO.\n", dev->name);
745 /* select packet to read from */
746 saved_packet = SMC_GET_PN(lp);
747 SMC_SET_PN(lp, packet_no);
749 /* read the first word (status word) from this packet */
750 SMC_SET_PTR(lp, PTR_AUTOINC | PTR_READ);
751 SMC_GET_PKT_HDR(lp, tx_status, pkt_len);
752 DBG(2, "%s: TX STATUS 0x%04x PNR 0x%02x\n",
753 dev->name, tx_status, packet_no);
755 if (!(tx_status & ES_TX_SUC))
756 dev->stats.tx_errors++;
758 if (tx_status & ES_LOSTCARR)
759 dev->stats.tx_carrier_errors++;
761 if (tx_status & (ES_LATCOL | ES_16COL)) {
762 PRINTK("%s: %s occurred on last xmit\n", dev->name,
763 (tx_status & ES_LATCOL) ?
764 "late collision" : "too many collisions");
765 dev->stats.tx_window_errors++;
766 if (!(dev->stats.tx_window_errors & 63) && net_ratelimit()) {
767 printk(KERN_INFO "%s: unexpectedly large number of "
768 "bad collisions. Please check duplex "
769 "setting.\n", dev->name);
773 /* kill the packet */
774 SMC_WAIT_MMU_BUSY(lp);
775 SMC_SET_MMU_CMD(lp, MC_FREEPKT);
777 /* Don't restore Packet Number Reg until busy bit is cleared */
778 SMC_WAIT_MMU_BUSY(lp);
779 SMC_SET_PN(lp, saved_packet);
781 /* re-enable transmit */
782 SMC_SELECT_BANK(lp, 0);
783 SMC_SET_TCR(lp, lp->tcr_cur_mode);
784 SMC_SELECT_BANK(lp, 2);
788 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
790 static void smc_mii_out(struct net_device *dev, unsigned int val, int bits)
792 struct smc_local *lp = netdev_priv(dev);
793 void __iomem *ioaddr = lp->base;
794 unsigned int mii_reg, mask;
796 mii_reg = SMC_GET_MII(lp) & ~(MII_MCLK | MII_MDOE | MII_MDO);
799 for (mask = 1 << (bits - 1); mask; mask >>= 1) {
805 SMC_SET_MII(lp, mii_reg);
807 SMC_SET_MII(lp, mii_reg | MII_MCLK);
812 static unsigned int smc_mii_in(struct net_device *dev, int bits)
814 struct smc_local *lp = netdev_priv(dev);
815 void __iomem *ioaddr = lp->base;
816 unsigned int mii_reg, mask, val;
818 mii_reg = SMC_GET_MII(lp) & ~(MII_MCLK | MII_MDOE | MII_MDO);
819 SMC_SET_MII(lp, mii_reg);
821 for (mask = 1 << (bits - 1), val = 0; mask; mask >>= 1) {
822 if (SMC_GET_MII(lp) & MII_MDI)
825 SMC_SET_MII(lp, mii_reg);
827 SMC_SET_MII(lp, mii_reg | MII_MCLK);
835 * Reads a register from the MII Management serial interface
837 static int smc_phy_read(struct net_device *dev, int phyaddr, int phyreg)
839 struct smc_local *lp = netdev_priv(dev);
840 void __iomem *ioaddr = lp->base;
841 unsigned int phydata;
843 SMC_SELECT_BANK(lp, 3);
846 smc_mii_out(dev, 0xffffffff, 32);
848 /* Start code (01) + read (10) + phyaddr + phyreg */
849 smc_mii_out(dev, 6 << 10 | phyaddr << 5 | phyreg, 14);
851 /* Turnaround (2bits) + phydata */
852 phydata = smc_mii_in(dev, 18);
854 /* Return to idle state */
855 SMC_SET_MII(lp, SMC_GET_MII(lp) & ~(MII_MCLK|MII_MDOE|MII_MDO));
857 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
858 __FUNCTION__, phyaddr, phyreg, phydata);
860 SMC_SELECT_BANK(lp, 2);
865 * Writes a register to the MII Management serial interface
867 static void smc_phy_write(struct net_device *dev, int phyaddr, int phyreg,
870 struct smc_local *lp = netdev_priv(dev);
871 void __iomem *ioaddr = lp->base;
873 SMC_SELECT_BANK(lp, 3);
876 smc_mii_out(dev, 0xffffffff, 32);
878 /* Start code (01) + write (01) + phyaddr + phyreg + turnaround + phydata */
879 smc_mii_out(dev, 5 << 28 | phyaddr << 23 | phyreg << 18 | 2 << 16 | phydata, 32);
881 /* Return to idle state */
882 SMC_SET_MII(lp, SMC_GET_MII(lp) & ~(MII_MCLK|MII_MDOE|MII_MDO));
884 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
885 __FUNCTION__, phyaddr, phyreg, phydata);
887 SMC_SELECT_BANK(lp, 2);
891 * Finds and reports the PHY address
893 static void smc_phy_detect(struct net_device *dev)
895 struct smc_local *lp = netdev_priv(dev);
898 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
903 * Scan all 32 PHY addresses if necessary, starting at
904 * PHY#1 to PHY#31, and then PHY#0 last.
906 for (phyaddr = 1; phyaddr < 33; ++phyaddr) {
907 unsigned int id1, id2;
909 /* Read the PHY identifiers */
910 id1 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID1);
911 id2 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID2);
913 DBG(3, "%s: phy_id1=0x%x, phy_id2=0x%x\n",
914 dev->name, id1, id2);
916 /* Make sure it is a valid identifier */
917 if (id1 != 0x0000 && id1 != 0xffff && id1 != 0x8000 &&
918 id2 != 0x0000 && id2 != 0xffff && id2 != 0x8000) {
919 /* Save the PHY's address */
920 lp->mii.phy_id = phyaddr & 31;
921 lp->phy_type = id1 << 16 | id2;
928 * Sets the PHY to a configuration as determined by the user
930 static int smc_phy_fixed(struct net_device *dev)
932 struct smc_local *lp = netdev_priv(dev);
933 void __iomem *ioaddr = lp->base;
934 int phyaddr = lp->mii.phy_id;
937 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
939 /* Enter Link Disable state */
940 cfg1 = smc_phy_read(dev, phyaddr, PHY_CFG1_REG);
941 cfg1 |= PHY_CFG1_LNKDIS;
942 smc_phy_write(dev, phyaddr, PHY_CFG1_REG, cfg1);
945 * Set our fixed capabilities
946 * Disable auto-negotiation
951 bmcr |= BMCR_FULLDPLX;
953 if (lp->ctl_rspeed == 100)
954 bmcr |= BMCR_SPEED100;
956 /* Write our capabilities to the phy control register */
957 smc_phy_write(dev, phyaddr, MII_BMCR, bmcr);
959 /* Re-Configure the Receive/Phy Control register */
960 SMC_SELECT_BANK(lp, 0);
961 SMC_SET_RPC(lp, lp->rpc_cur_mode);
962 SMC_SELECT_BANK(lp, 2);
968 * smc_phy_reset - reset the phy
972 * Issue a software reset for the specified PHY and
973 * wait up to 100ms for the reset to complete. We should
974 * not access the PHY for 50ms after issuing the reset.
976 * The time to wait appears to be dependent on the PHY.
978 * Must be called with lp->lock locked.
980 static int smc_phy_reset(struct net_device *dev, int phy)
982 struct smc_local *lp = netdev_priv(dev);
986 smc_phy_write(dev, phy, MII_BMCR, BMCR_RESET);
988 for (timeout = 2; timeout; timeout--) {
989 spin_unlock_irq(&lp->lock);
991 spin_lock_irq(&lp->lock);
993 bmcr = smc_phy_read(dev, phy, MII_BMCR);
994 if (!(bmcr & BMCR_RESET))
998 return bmcr & BMCR_RESET;
1002 * smc_phy_powerdown - powerdown phy
1005 * Power down the specified PHY
1007 static void smc_phy_powerdown(struct net_device *dev)
1009 struct smc_local *lp = netdev_priv(dev);
1011 int phy = lp->mii.phy_id;
1013 if (lp->phy_type == 0)
1016 /* We need to ensure that no calls to smc_phy_configure are
1019 flush_scheduled_work() cannot be called because we are
1020 running with the netlink semaphore held (from
1021 devinet_ioctl()) and the pending work queue contains
1022 linkwatch_event() (scheduled by netif_carrier_off()
1023 above). linkwatch_event() also wants the netlink semaphore.
1025 while(lp->work_pending)
1028 bmcr = smc_phy_read(dev, phy, MII_BMCR);
1029 smc_phy_write(dev, phy, MII_BMCR, bmcr | BMCR_PDOWN);
1033 * smc_phy_check_media - check the media status and adjust TCR
1035 * @init: set true for initialisation
1037 * Select duplex mode depending on negotiation state. This
1038 * also updates our carrier state.
1040 static void smc_phy_check_media(struct net_device *dev, int init)
1042 struct smc_local *lp = netdev_priv(dev);
1043 void __iomem *ioaddr = lp->base;
1045 if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
1046 /* duplex state has changed */
1047 if (lp->mii.full_duplex) {
1048 lp->tcr_cur_mode |= TCR_SWFDUP;
1050 lp->tcr_cur_mode &= ~TCR_SWFDUP;
1053 SMC_SELECT_BANK(lp, 0);
1054 SMC_SET_TCR(lp, lp->tcr_cur_mode);
1059 * Configures the specified PHY through the MII management interface
1060 * using Autonegotiation.
1061 * Calls smc_phy_fixed() if the user has requested a certain config.
1062 * If RPC ANEG bit is set, the media selection is dependent purely on
1063 * the selection by the MII (either in the MII BMCR reg or the result
1064 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
1065 * is controlled by the RPC SPEED and RPC DPLX bits.
1067 static void smc_phy_configure(struct work_struct *work)
1069 struct smc_local *lp =
1070 container_of(work, struct smc_local, phy_configure);
1071 struct net_device *dev = lp->dev;
1072 void __iomem *ioaddr = lp->base;
1073 int phyaddr = lp->mii.phy_id;
1074 int my_phy_caps; /* My PHY capabilities */
1075 int my_ad_caps; /* My Advertised capabilities */
1078 DBG(3, "%s:smc_program_phy()\n", dev->name);
1080 spin_lock_irq(&lp->lock);
1083 * We should not be called if phy_type is zero.
1085 if (lp->phy_type == 0)
1086 goto smc_phy_configure_exit;
1088 if (smc_phy_reset(dev, phyaddr)) {
1089 printk("%s: PHY reset timed out\n", dev->name);
1090 goto smc_phy_configure_exit;
1094 * Enable PHY Interrupts (for register 18)
1095 * Interrupts listed here are disabled
1097 smc_phy_write(dev, phyaddr, PHY_MASK_REG,
1098 PHY_INT_LOSSSYNC | PHY_INT_CWRD | PHY_INT_SSD |
1099 PHY_INT_ESD | PHY_INT_RPOL | PHY_INT_JAB |
1100 PHY_INT_SPDDET | PHY_INT_DPLXDET);
1102 /* Configure the Receive/Phy Control register */
1103 SMC_SELECT_BANK(lp, 0);
1104 SMC_SET_RPC(lp, lp->rpc_cur_mode);
1106 /* If the user requested no auto neg, then go set his request */
1107 if (lp->mii.force_media) {
1109 goto smc_phy_configure_exit;
1112 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
1113 my_phy_caps = smc_phy_read(dev, phyaddr, MII_BMSR);
1115 if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
1116 printk(KERN_INFO "Auto negotiation NOT supported\n");
1118 goto smc_phy_configure_exit;
1121 my_ad_caps = ADVERTISE_CSMA; /* I am CSMA capable */
1123 if (my_phy_caps & BMSR_100BASE4)
1124 my_ad_caps |= ADVERTISE_100BASE4;
1125 if (my_phy_caps & BMSR_100FULL)
1126 my_ad_caps |= ADVERTISE_100FULL;
1127 if (my_phy_caps & BMSR_100HALF)
1128 my_ad_caps |= ADVERTISE_100HALF;
1129 if (my_phy_caps & BMSR_10FULL)
1130 my_ad_caps |= ADVERTISE_10FULL;
1131 if (my_phy_caps & BMSR_10HALF)
1132 my_ad_caps |= ADVERTISE_10HALF;
1134 /* Disable capabilities not selected by our user */
1135 if (lp->ctl_rspeed != 100)
1136 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
1138 if (!lp->ctl_rfduplx)
1139 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
1141 /* Update our Auto-Neg Advertisement Register */
1142 smc_phy_write(dev, phyaddr, MII_ADVERTISE, my_ad_caps);
1143 lp->mii.advertising = my_ad_caps;
1146 * Read the register back. Without this, it appears that when
1147 * auto-negotiation is restarted, sometimes it isn't ready and
1148 * the link does not come up.
1150 status = smc_phy_read(dev, phyaddr, MII_ADVERTISE);
1152 DBG(2, "%s: phy caps=%x\n", dev->name, my_phy_caps);
1153 DBG(2, "%s: phy advertised caps=%x\n", dev->name, my_ad_caps);
1155 /* Restart auto-negotiation process in order to advertise my caps */
1156 smc_phy_write(dev, phyaddr, MII_BMCR, BMCR_ANENABLE | BMCR_ANRESTART);
1158 smc_phy_check_media(dev, 1);
1160 smc_phy_configure_exit:
1161 SMC_SELECT_BANK(lp, 2);
1162 spin_unlock_irq(&lp->lock);
1163 lp->work_pending = 0;
1169 * Purpose: Handle interrupts relating to PHY register 18. This is
1170 * called from the "hard" interrupt handler under our private spinlock.
1172 static void smc_phy_interrupt(struct net_device *dev)
1174 struct smc_local *lp = netdev_priv(dev);
1175 int phyaddr = lp->mii.phy_id;
1178 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1180 if (lp->phy_type == 0)
1184 smc_phy_check_media(dev, 0);
1186 /* Read PHY Register 18, Status Output */
1187 phy18 = smc_phy_read(dev, phyaddr, PHY_INT_REG);
1188 if ((phy18 & PHY_INT_INT) == 0)
1193 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1195 static void smc_10bt_check_media(struct net_device *dev, int init)
1197 struct smc_local *lp = netdev_priv(dev);
1198 void __iomem *ioaddr = lp->base;
1199 unsigned int old_carrier, new_carrier;
1201 old_carrier = netif_carrier_ok(dev) ? 1 : 0;
1203 SMC_SELECT_BANK(lp, 0);
1204 new_carrier = (SMC_GET_EPH_STATUS(lp) & ES_LINK_OK) ? 1 : 0;
1205 SMC_SELECT_BANK(lp, 2);
1207 if (init || (old_carrier != new_carrier)) {
1209 netif_carrier_off(dev);
1211 netif_carrier_on(dev);
1213 if (netif_msg_link(lp))
1214 printk(KERN_INFO "%s: link %s\n", dev->name,
1215 new_carrier ? "up" : "down");
1219 static void smc_eph_interrupt(struct net_device *dev)
1221 struct smc_local *lp = netdev_priv(dev);
1222 void __iomem *ioaddr = lp->base;
1225 smc_10bt_check_media(dev, 0);
1227 SMC_SELECT_BANK(lp, 1);
1228 ctl = SMC_GET_CTL(lp);
1229 SMC_SET_CTL(lp, ctl & ~CTL_LE_ENABLE);
1230 SMC_SET_CTL(lp, ctl);
1231 SMC_SELECT_BANK(lp, 2);
1235 * This is the main routine of the driver, to handle the device when
1236 * it needs some attention.
1238 static irqreturn_t smc_interrupt(int irq, void *dev_id)
1240 struct net_device *dev = dev_id;
1241 struct smc_local *lp = netdev_priv(dev);
1242 void __iomem *ioaddr = lp->base;
1243 int status, mask, timeout, card_stats;
1246 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
1248 spin_lock(&lp->lock);
1250 /* A preamble may be used when there is a potential race
1251 * between the interruptible transmit functions and this
1253 SMC_INTERRUPT_PREAMBLE;
1255 saved_pointer = SMC_GET_PTR(lp);
1256 mask = SMC_GET_INT_MASK(lp);
1257 SMC_SET_INT_MASK(lp, 0);
1259 /* set a timeout value, so I don't stay here forever */
1260 timeout = MAX_IRQ_LOOPS;
1263 status = SMC_GET_INT(lp);
1265 DBG(2, "%s: INT 0x%02x MASK 0x%02x MEM 0x%04x FIFO 0x%04x\n",
1266 dev->name, status, mask,
1267 ({ int meminfo; SMC_SELECT_BANK(lp, 0);
1268 meminfo = SMC_GET_MIR(lp);
1269 SMC_SELECT_BANK(lp, 2); meminfo; }),
1276 if (status & IM_TX_INT) {
1277 /* do this before RX as it will free memory quickly */
1278 DBG(3, "%s: TX int\n", dev->name);
1280 SMC_ACK_INT(lp, IM_TX_INT);
1281 if (THROTTLE_TX_PKTS)
1282 netif_wake_queue(dev);
1283 } else if (status & IM_RCV_INT) {
1284 DBG(3, "%s: RX irq\n", dev->name);
1286 } else if (status & IM_ALLOC_INT) {
1287 DBG(3, "%s: Allocation irq\n", dev->name);
1288 tasklet_hi_schedule(&lp->tx_task);
1289 mask &= ~IM_ALLOC_INT;
1290 } else if (status & IM_TX_EMPTY_INT) {
1291 DBG(3, "%s: TX empty\n", dev->name);
1292 mask &= ~IM_TX_EMPTY_INT;
1295 SMC_SELECT_BANK(lp, 0);
1296 card_stats = SMC_GET_COUNTER(lp);
1297 SMC_SELECT_BANK(lp, 2);
1299 /* single collisions */
1300 dev->stats.collisions += card_stats & 0xF;
1303 /* multiple collisions */
1304 dev->stats.collisions += card_stats & 0xF;
1305 } else if (status & IM_RX_OVRN_INT) {
1306 DBG(1, "%s: RX overrun (EPH_ST 0x%04x)\n", dev->name,
1307 ({ int eph_st; SMC_SELECT_BANK(lp, 0);
1308 eph_st = SMC_GET_EPH_STATUS(lp);
1309 SMC_SELECT_BANK(lp, 2); eph_st; }));
1310 SMC_ACK_INT(lp, IM_RX_OVRN_INT);
1311 dev->stats.rx_errors++;
1312 dev->stats.rx_fifo_errors++;
1313 } else if (status & IM_EPH_INT) {
1314 smc_eph_interrupt(dev);
1315 } else if (status & IM_MDINT) {
1316 SMC_ACK_INT(lp, IM_MDINT);
1317 smc_phy_interrupt(dev);
1318 } else if (status & IM_ERCV_INT) {
1319 SMC_ACK_INT(lp, IM_ERCV_INT);
1320 PRINTK("%s: UNSUPPORTED: ERCV INTERRUPT \n", dev->name);
1322 } while (--timeout);
1324 /* restore register states */
1325 SMC_SET_PTR(lp, saved_pointer);
1326 SMC_SET_INT_MASK(lp, mask);
1327 spin_unlock(&lp->lock);
1329 #ifndef CONFIG_NET_POLL_CONTROLLER
1330 if (timeout == MAX_IRQ_LOOPS)
1331 PRINTK("%s: spurious interrupt (mask = 0x%02x)\n",
1334 DBG(3, "%s: Interrupt done (%d loops)\n",
1335 dev->name, MAX_IRQ_LOOPS - timeout);
1338 * We return IRQ_HANDLED unconditionally here even if there was
1339 * nothing to do. There is a possibility that a packet might
1340 * get enqueued into the chip right after TX_EMPTY_INT is raised
1341 * but just before the CPU acknowledges the IRQ.
1342 * Better take an unneeded IRQ in some occasions than complexifying
1343 * the code for all cases.
1348 #ifdef CONFIG_NET_POLL_CONTROLLER
1350 * Polling receive - used by netconsole and other diagnostic tools
1351 * to allow network i/o with interrupts disabled.
1353 static void smc_poll_controller(struct net_device *dev)
1355 disable_irq(dev->irq);
1356 smc_interrupt(dev->irq, dev);
1357 enable_irq(dev->irq);
1361 /* Our watchdog timed out. Called by the networking layer */
1362 static void smc_timeout(struct net_device *dev)
1364 struct smc_local *lp = netdev_priv(dev);
1365 void __iomem *ioaddr = lp->base;
1366 int status, mask, eph_st, meminfo, fifo;
1368 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1370 spin_lock_irq(&lp->lock);
1371 status = SMC_GET_INT(lp);
1372 mask = SMC_GET_INT_MASK(lp);
1373 fifo = SMC_GET_FIFO(lp);
1374 SMC_SELECT_BANK(lp, 0);
1375 eph_st = SMC_GET_EPH_STATUS(lp);
1376 meminfo = SMC_GET_MIR(lp);
1377 SMC_SELECT_BANK(lp, 2);
1378 spin_unlock_irq(&lp->lock);
1379 PRINTK( "%s: TX timeout (INT 0x%02x INTMASK 0x%02x "
1380 "MEM 0x%04x FIFO 0x%04x EPH_ST 0x%04x)\n",
1381 dev->name, status, mask, meminfo, fifo, eph_st );
1387 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1388 * smc_phy_configure() calls msleep() which calls schedule_timeout()
1389 * which calls schedule(). Hence we use a work queue.
1391 if (lp->phy_type != 0) {
1392 if (schedule_work(&lp->phy_configure)) {
1393 lp->work_pending = 1;
1397 /* We can accept TX packets again */
1398 dev->trans_start = jiffies;
1399 netif_wake_queue(dev);
1403 * This routine will, depending on the values passed to it,
1404 * either make it accept multicast packets, go into
1405 * promiscuous mode (for TCPDUMP and cousins) or accept
1406 * a select set of multicast packets
1408 static void smc_set_multicast_list(struct net_device *dev)
1410 struct smc_local *lp = netdev_priv(dev);
1411 void __iomem *ioaddr = lp->base;
1412 unsigned char multicast_table[8];
1413 int update_multicast = 0;
1415 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1417 if (dev->flags & IFF_PROMISC) {
1418 DBG(2, "%s: RCR_PRMS\n", dev->name);
1419 lp->rcr_cur_mode |= RCR_PRMS;
1422 /* BUG? I never disable promiscuous mode if multicasting was turned on.
1423 Now, I turn off promiscuous mode, but I don't do anything to multicasting
1424 when promiscuous mode is turned on.
1428 * Here, I am setting this to accept all multicast packets.
1429 * I don't need to zero the multicast table, because the flag is
1430 * checked before the table is
1432 else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) {
1433 DBG(2, "%s: RCR_ALMUL\n", dev->name);
1434 lp->rcr_cur_mode |= RCR_ALMUL;
1438 * This sets the internal hardware table to filter out unwanted
1439 * multicast packets before they take up memory.
1441 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1442 * address are the offset into the table. If that bit is 1, then the
1443 * multicast packet is accepted. Otherwise, it's dropped silently.
1445 * To use the 6 bits as an offset into the table, the high 3 bits are
1446 * the number of the 8 bit register, while the low 3 bits are the bit
1447 * within that register.
1449 else if (dev->mc_count) {
1451 struct dev_mc_list *cur_addr;
1453 /* table for flipping the order of 3 bits */
1454 static const unsigned char invert3[] = {0, 4, 2, 6, 1, 5, 3, 7};
1456 /* start with a table of all zeros: reject all */
1457 memset(multicast_table, 0, sizeof(multicast_table));
1459 cur_addr = dev->mc_list;
1460 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
1463 /* do we have a pointer here? */
1466 /* make sure this is a multicast address -
1467 shouldn't this be a given if we have it here ? */
1468 if (!(*cur_addr->dmi_addr & 1))
1471 /* only use the low order bits */
1472 position = crc32_le(~0, cur_addr->dmi_addr, 6) & 0x3f;
1474 /* do some messy swapping to put the bit in the right spot */
1475 multicast_table[invert3[position&7]] |=
1476 (1<<invert3[(position>>3)&7]);
1479 /* be sure I get rid of flags I might have set */
1480 lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL);
1482 /* now, the table can be loaded into the chipset */
1483 update_multicast = 1;
1485 DBG(2, "%s: ~(RCR_PRMS|RCR_ALMUL)\n", dev->name);
1486 lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL);
1489 * since I'm disabling all multicast entirely, I need to
1490 * clear the multicast list
1492 memset(multicast_table, 0, sizeof(multicast_table));
1493 update_multicast = 1;
1496 spin_lock_irq(&lp->lock);
1497 SMC_SELECT_BANK(lp, 0);
1498 SMC_SET_RCR(lp, lp->rcr_cur_mode);
1499 if (update_multicast) {
1500 SMC_SELECT_BANK(lp, 3);
1501 SMC_SET_MCAST(lp, multicast_table);
1503 SMC_SELECT_BANK(lp, 2);
1504 spin_unlock_irq(&lp->lock);
1509 * Open and Initialize the board
1511 * Set up everything, reset the card, etc..
1514 smc_open(struct net_device *dev)
1516 struct smc_local *lp = netdev_priv(dev);
1518 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1521 * Check that the address is valid. If its not, refuse
1522 * to bring the device up. The user must specify an
1523 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1525 if (!is_valid_ether_addr(dev->dev_addr)) {
1526 PRINTK("%s: no valid ethernet hw addr\n", __FUNCTION__);
1530 /* Setup the default Register Modes */
1531 lp->tcr_cur_mode = TCR_DEFAULT;
1532 lp->rcr_cur_mode = RCR_DEFAULT;
1533 lp->rpc_cur_mode = RPC_DEFAULT;
1536 * If we are not using a MII interface, we need to
1537 * monitor our own carrier signal to detect faults.
1539 if (lp->phy_type == 0)
1540 lp->tcr_cur_mode |= TCR_MON_CSN;
1542 /* reset the hardware */
1546 /* Configure the PHY, initialize the link state */
1547 if (lp->phy_type != 0)
1548 smc_phy_configure(&lp->phy_configure);
1550 spin_lock_irq(&lp->lock);
1551 smc_10bt_check_media(dev, 1);
1552 spin_unlock_irq(&lp->lock);
1555 netif_start_queue(dev);
1562 * this makes the board clean up everything that it can
1563 * and not talk to the outside world. Caused by
1564 * an 'ifconfig ethX down'
1566 static int smc_close(struct net_device *dev)
1568 struct smc_local *lp = netdev_priv(dev);
1570 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1572 netif_stop_queue(dev);
1573 netif_carrier_off(dev);
1575 /* clear everything */
1577 tasklet_kill(&lp->tx_task);
1578 smc_phy_powerdown(dev);
1586 smc_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1588 struct smc_local *lp = netdev_priv(dev);
1594 if (lp->phy_type != 0) {
1595 spin_lock_irq(&lp->lock);
1596 ret = mii_ethtool_gset(&lp->mii, cmd);
1597 spin_unlock_irq(&lp->lock);
1599 cmd->supported = SUPPORTED_10baseT_Half |
1600 SUPPORTED_10baseT_Full |
1601 SUPPORTED_TP | SUPPORTED_AUI;
1603 if (lp->ctl_rspeed == 10)
1604 cmd->speed = SPEED_10;
1605 else if (lp->ctl_rspeed == 100)
1606 cmd->speed = SPEED_100;
1608 cmd->autoneg = AUTONEG_DISABLE;
1609 cmd->transceiver = XCVR_INTERNAL;
1611 cmd->duplex = lp->tcr_cur_mode & TCR_SWFDUP ? DUPLEX_FULL : DUPLEX_HALF;
1620 smc_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1622 struct smc_local *lp = netdev_priv(dev);
1625 if (lp->phy_type != 0) {
1626 spin_lock_irq(&lp->lock);
1627 ret = mii_ethtool_sset(&lp->mii, cmd);
1628 spin_unlock_irq(&lp->lock);
1630 if (cmd->autoneg != AUTONEG_DISABLE ||
1631 cmd->speed != SPEED_10 ||
1632 (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1633 (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1636 // lp->port = cmd->port;
1637 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1639 // if (netif_running(dev))
1640 // smc_set_port(dev);
1649 smc_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1651 strncpy(info->driver, CARDNAME, sizeof(info->driver));
1652 strncpy(info->version, version, sizeof(info->version));
1653 strncpy(info->bus_info, dev->dev.parent->bus_id, sizeof(info->bus_info));
1656 static int smc_ethtool_nwayreset(struct net_device *dev)
1658 struct smc_local *lp = netdev_priv(dev);
1661 if (lp->phy_type != 0) {
1662 spin_lock_irq(&lp->lock);
1663 ret = mii_nway_restart(&lp->mii);
1664 spin_unlock_irq(&lp->lock);
1670 static u32 smc_ethtool_getmsglevel(struct net_device *dev)
1672 struct smc_local *lp = netdev_priv(dev);
1673 return lp->msg_enable;
1676 static void smc_ethtool_setmsglevel(struct net_device *dev, u32 level)
1678 struct smc_local *lp = netdev_priv(dev);
1679 lp->msg_enable = level;
1682 static const struct ethtool_ops smc_ethtool_ops = {
1683 .get_settings = smc_ethtool_getsettings,
1684 .set_settings = smc_ethtool_setsettings,
1685 .get_drvinfo = smc_ethtool_getdrvinfo,
1687 .get_msglevel = smc_ethtool_getmsglevel,
1688 .set_msglevel = smc_ethtool_setmsglevel,
1689 .nway_reset = smc_ethtool_nwayreset,
1690 .get_link = ethtool_op_get_link,
1691 // .get_eeprom = smc_ethtool_geteeprom,
1692 // .set_eeprom = smc_ethtool_seteeprom,
1698 * This routine has a simple purpose -- make the SMC chip generate an
1699 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1702 * does this still work?
1704 * I just deleted auto_irq.c, since it was never built...
1707 static int __init smc_findirq(struct smc_local *lp)
1709 void __iomem *ioaddr = lp->base;
1711 unsigned long cookie;
1713 DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__);
1715 cookie = probe_irq_on();
1718 * What I try to do here is trigger an ALLOC_INT. This is done
1719 * by allocating a small chunk of memory, which will give an interrupt
1722 /* enable ALLOCation interrupts ONLY */
1723 SMC_SELECT_BANK(lp, 2);
1724 SMC_SET_INT_MASK(lp, IM_ALLOC_INT);
1727 * Allocate 512 bytes of memory. Note that the chip was just
1728 * reset so all the memory is available
1730 SMC_SET_MMU_CMD(lp, MC_ALLOC | 1);
1733 * Wait until positive that the interrupt has been generated
1738 int_status = SMC_GET_INT(lp);
1739 if (int_status & IM_ALLOC_INT)
1740 break; /* got the interrupt */
1741 } while (--timeout);
1744 * there is really nothing that I can do here if timeout fails,
1745 * as autoirq_report will return a 0 anyway, which is what I
1746 * want in this case. Plus, the clean up is needed in both
1750 /* and disable all interrupts again */
1751 SMC_SET_INT_MASK(lp, 0);
1753 /* and return what I found */
1754 return probe_irq_off(cookie);
1758 * Function: smc_probe(unsigned long ioaddr)
1761 * Tests to see if a given ioaddr points to an SMC91x chip.
1762 * Returns a 0 on success
1765 * (1) see if the high byte of BANK_SELECT is 0x33
1766 * (2) compare the ioaddr with the base register's address
1767 * (3) see if I recognize the chip ID in the appropriate register
1769 * Here I do typical initialization tasks.
1771 * o Initialize the structure if needed
1772 * o print out my vanity message if not done so already
1773 * o print out what type of hardware is detected
1774 * o print out the ethernet address
1776 * o set up my private data
1777 * o configure the dev structure with my subroutines
1778 * o actually GRAB the irq.
1781 static int __init smc_probe(struct net_device *dev, void __iomem *ioaddr,
1782 unsigned long irq_flags)
1784 struct smc_local *lp = netdev_priv(dev);
1785 static int version_printed = 0;
1787 unsigned int val, revision_register;
1788 const char *version_string;
1789 DECLARE_MAC_BUF(mac);
1791 DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__);
1793 /* First, see if the high byte is 0x33 */
1794 val = SMC_CURRENT_BANK(lp);
1795 DBG(2, "%s: bank signature probe returned 0x%04x\n", CARDNAME, val);
1796 if ((val & 0xFF00) != 0x3300) {
1797 if ((val & 0xFF) == 0x33) {
1799 "%s: Detected possible byte-swapped interface"
1800 " at IOADDR %p\n", CARDNAME, ioaddr);
1807 * The above MIGHT indicate a device, but I need to write to
1808 * further test this.
1810 SMC_SELECT_BANK(lp, 0);
1811 val = SMC_CURRENT_BANK(lp);
1812 if ((val & 0xFF00) != 0x3300) {
1818 * well, we've already written once, so hopefully another
1819 * time won't hurt. This time, I need to switch the bank
1820 * register to bank 1, so I can access the base address
1823 SMC_SELECT_BANK(lp, 1);
1824 val = SMC_GET_BASE(lp);
1825 val = ((val & 0x1F00) >> 3) << SMC_IO_SHIFT;
1826 if (((unsigned int)ioaddr & (0x3e0 << SMC_IO_SHIFT)) != val) {
1827 printk("%s: IOADDR %p doesn't match configuration (%x).\n",
1828 CARDNAME, ioaddr, val);
1832 * check if the revision register is something that I
1833 * recognize. These might need to be added to later,
1834 * as future revisions could be added.
1836 SMC_SELECT_BANK(lp, 3);
1837 revision_register = SMC_GET_REV(lp);
1838 DBG(2, "%s: revision = 0x%04x\n", CARDNAME, revision_register);
1839 version_string = chip_ids[ (revision_register >> 4) & 0xF];
1840 if (!version_string || (revision_register & 0xff00) != 0x3300) {
1841 /* I don't recognize this chip, so... */
1842 printk("%s: IO %p: Unrecognized revision register 0x%04x"
1843 ", Contact author.\n", CARDNAME,
1844 ioaddr, revision_register);
1850 /* At this point I'll assume that the chip is an SMC91x. */
1851 if (version_printed++ == 0)
1852 printk("%s", version);
1854 /* fill in some of the fields */
1855 dev->base_addr = (unsigned long)ioaddr;
1857 lp->version = revision_register & 0xff;
1858 spin_lock_init(&lp->lock);
1860 /* Get the MAC address */
1861 SMC_SELECT_BANK(lp, 1);
1862 SMC_GET_MAC_ADDR(lp, dev->dev_addr);
1864 /* now, reset the chip, and put it into a known state */
1868 * If dev->irq is 0, then the device has to be banged on to see
1871 * This banging doesn't always detect the IRQ, for unknown reasons.
1872 * a workaround is to reset the chip and try again.
1874 * Interestingly, the DOS packet driver *SETS* the IRQ on the card to
1875 * be what is requested on the command line. I don't do that, mostly
1876 * because the card that I have uses a non-standard method of accessing
1877 * the IRQs, and because this _should_ work in most configurations.
1879 * Specifying an IRQ is done with the assumption that the user knows
1880 * what (s)he is doing. No checking is done!!!!
1887 dev->irq = smc_findirq(lp);
1890 /* kick the card and try again */
1894 if (dev->irq == 0) {
1895 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
1900 dev->irq = irq_canonicalize(dev->irq);
1902 /* Fill in the fields of the device structure with ethernet values. */
1905 dev->open = smc_open;
1906 dev->stop = smc_close;
1907 dev->hard_start_xmit = smc_hard_start_xmit;
1908 dev->tx_timeout = smc_timeout;
1909 dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1910 dev->set_multicast_list = smc_set_multicast_list;
1911 dev->ethtool_ops = &smc_ethtool_ops;
1912 #ifdef CONFIG_NET_POLL_CONTROLLER
1913 dev->poll_controller = smc_poll_controller;
1916 tasklet_init(&lp->tx_task, smc_hardware_send_pkt, (unsigned long)dev);
1917 INIT_WORK(&lp->phy_configure, smc_phy_configure);
1919 lp->mii.phy_id_mask = 0x1f;
1920 lp->mii.reg_num_mask = 0x1f;
1921 lp->mii.force_media = 0;
1922 lp->mii.full_duplex = 0;
1924 lp->mii.mdio_read = smc_phy_read;
1925 lp->mii.mdio_write = smc_phy_write;
1928 * Locate the phy, if any.
1930 if (lp->version >= (CHIP_91100 << 4))
1931 smc_phy_detect(dev);
1933 /* then shut everything down to save power */
1935 smc_phy_powerdown(dev);
1937 /* Set default parameters */
1938 lp->msg_enable = NETIF_MSG_LINK;
1939 lp->ctl_rfduplx = 0;
1940 lp->ctl_rspeed = 10;
1942 if (lp->version >= (CHIP_91100 << 4)) {
1943 lp->ctl_rfduplx = 1;
1944 lp->ctl_rspeed = 100;
1948 retval = request_irq(dev->irq, &smc_interrupt, irq_flags, dev->name, dev);
1952 #ifdef SMC_USE_PXA_DMA
1954 int dma = pxa_request_dma(dev->name, DMA_PRIO_LOW,
1955 smc_pxa_dma_irq, NULL);
1961 retval = register_netdev(dev);
1963 /* now, print out the card info, in a short format.. */
1964 printk("%s: %s (rev %d) at %p IRQ %d",
1965 dev->name, version_string, revision_register & 0x0f,
1966 lp->base, dev->irq);
1968 if (dev->dma != (unsigned char)-1)
1969 printk(" DMA %d", dev->dma);
1971 printk("%s%s\n", nowait ? " [nowait]" : "",
1972 THROTTLE_TX_PKTS ? " [throttle_tx]" : "");
1974 if (!is_valid_ether_addr(dev->dev_addr)) {
1975 printk("%s: Invalid ethernet MAC address. Please "
1976 "set using ifconfig\n", dev->name);
1978 /* Print the Ethernet address */
1979 printk("%s: Ethernet addr: %s\n",
1980 dev->name, print_mac(mac, dev->dev_addr));
1983 if (lp->phy_type == 0) {
1984 PRINTK("%s: No PHY found\n", dev->name);
1985 } else if ((lp->phy_type & 0xfffffff0) == 0x0016f840) {
1986 PRINTK("%s: PHY LAN83C183 (LAN91C111 Internal)\n", dev->name);
1987 } else if ((lp->phy_type & 0xfffffff0) == 0x02821c50) {
1988 PRINTK("%s: PHY LAN83C180\n", dev->name);
1993 #ifdef SMC_USE_PXA_DMA
1994 if (retval && dev->dma != (unsigned char)-1)
1995 pxa_free_dma(dev->dma);
2000 static int smc_enable_device(struct platform_device *pdev)
2002 struct net_device *ndev = platform_get_drvdata(pdev);
2003 struct smc_local *lp = netdev_priv(ndev);
2004 unsigned long flags;
2005 unsigned char ecor, ecsr;
2007 struct resource * res;
2009 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2014 * Map the attribute space. This is overkill, but clean.
2016 addr = ioremap(res->start, ATTRIB_SIZE);
2021 * Reset the device. We must disable IRQs around this
2022 * since a reset causes the IRQ line become active.
2024 local_irq_save(flags);
2025 ecor = readb(addr + (ECOR << SMC_IO_SHIFT)) & ~ECOR_RESET;
2026 writeb(ecor | ECOR_RESET, addr + (ECOR << SMC_IO_SHIFT));
2027 readb(addr + (ECOR << SMC_IO_SHIFT));
2030 * Wait 100us for the chip to reset.
2035 * The device will ignore all writes to the enable bit while
2036 * reset is asserted, even if the reset bit is cleared in the
2037 * same write. Must clear reset first, then enable the device.
2039 writeb(ecor, addr + (ECOR << SMC_IO_SHIFT));
2040 writeb(ecor | ECOR_ENABLE, addr + (ECOR << SMC_IO_SHIFT));
2043 * Set the appropriate byte/word mode.
2045 ecsr = readb(addr + (ECSR << SMC_IO_SHIFT)) & ~ECSR_IOIS8;
2048 writeb(ecsr, addr + (ECSR << SMC_IO_SHIFT));
2049 local_irq_restore(flags);
2054 * Wait for the chip to wake up. We could poll the control
2055 * register in the main register space, but that isn't mapped
2056 * yet. We know this is going to take 750us.
2063 static int smc_request_attrib(struct platform_device *pdev)
2065 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2070 if (!request_mem_region(res->start, ATTRIB_SIZE, CARDNAME))
2076 static void smc_release_attrib(struct platform_device *pdev)
2078 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2081 release_mem_region(res->start, ATTRIB_SIZE);
2084 static inline void smc_request_datacs(struct platform_device *pdev, struct net_device *ndev)
2086 if (SMC_CAN_USE_DATACS) {
2087 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32");
2088 struct smc_local *lp = netdev_priv(ndev);
2093 if(!request_mem_region(res->start, SMC_DATA_EXTENT, CARDNAME)) {
2094 printk(KERN_INFO "%s: failed to request datacs memory region.\n", CARDNAME);
2098 lp->datacs = ioremap(res->start, SMC_DATA_EXTENT);
2102 static void smc_release_datacs(struct platform_device *pdev, struct net_device *ndev)
2104 if (SMC_CAN_USE_DATACS) {
2105 struct smc_local *lp = netdev_priv(ndev);
2106 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32");
2109 iounmap(lp->datacs);
2114 release_mem_region(res->start, SMC_DATA_EXTENT);
2121 * dev->base_addr == 0, try to find all possible locations
2122 * dev->base_addr > 0x1ff, this is the address to check
2123 * dev->base_addr == <anything else>, return failure code
2126 * 0 --> there is a device
2127 * anything else, error
2129 static int smc_drv_probe(struct platform_device *pdev)
2131 struct smc91x_platdata *pd = pdev->dev.platform_data;
2132 struct smc_local *lp;
2133 struct net_device *ndev;
2134 struct resource *res, *ires;
2135 unsigned int __iomem *addr;
2138 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
2140 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2147 if (!request_mem_region(res->start, SMC_IO_EXTENT, CARDNAME)) {
2152 ndev = alloc_etherdev(sizeof(struct smc_local));
2154 printk("%s: could not allocate device.\n", CARDNAME);
2156 goto out_release_io;
2158 SET_NETDEV_DEV(ndev, &pdev->dev);
2160 /* get configuration from platform data, only allow use of
2161 * bus width if both SMC_CAN_USE_xxx and SMC91X_USE_xxx are set.
2164 lp = netdev_priv(ndev);
2165 lp->cfg.irq_flags = SMC_IRQ_FLAGS;
2167 #ifdef SMC_DYNAMIC_BUS_CONFIG
2169 memcpy(&lp->cfg, pd, sizeof(lp->cfg));
2171 lp->cfg.flags = SMC91X_USE_8BIT;
2172 lp->cfg.flags |= SMC91X_USE_16BIT;
2173 lp->cfg.flags |= SMC91X_USE_32BIT;
2176 lp->cfg.flags &= ~(SMC_CAN_USE_8BIT ? 0 : SMC91X_USE_8BIT);
2177 lp->cfg.flags &= ~(SMC_CAN_USE_16BIT ? 0 : SMC91X_USE_16BIT);
2178 lp->cfg.flags &= ~(SMC_CAN_USE_32BIT ? 0 : SMC91X_USE_32BIT);
2181 ndev->dma = (unsigned char)-1;
2183 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2186 goto out_free_netdev;
2189 ndev->irq = ires->start;
2190 if (SMC_IRQ_FLAGS == -1)
2191 lp->cfg.irq_flags = ires->flags & IRQF_TRIGGER_MASK;
2193 ret = smc_request_attrib(pdev);
2195 goto out_free_netdev;
2196 #if defined(CONFIG_SA1100_ASSABET)
2197 NCR_0 |= NCR_ENET_OSC_EN;
2199 platform_set_drvdata(pdev, ndev);
2200 ret = smc_enable_device(pdev);
2202 goto out_release_attrib;
2204 addr = ioremap(res->start, SMC_IO_EXTENT);
2207 goto out_release_attrib;
2210 #ifdef SMC_USE_PXA_DMA
2212 struct smc_local *lp = netdev_priv(ndev);
2213 lp->device = &pdev->dev;
2214 lp->physaddr = res->start;
2218 ret = smc_probe(ndev, addr, lp->cfg.irq_flags);
2222 smc_request_datacs(pdev, ndev);
2227 platform_set_drvdata(pdev, NULL);
2230 smc_release_attrib(pdev);
2234 release_mem_region(res->start, SMC_IO_EXTENT);
2236 printk("%s: not found (%d).\n", CARDNAME, ret);
2241 static int smc_drv_remove(struct platform_device *pdev)
2243 struct net_device *ndev = platform_get_drvdata(pdev);
2244 struct smc_local *lp = netdev_priv(ndev);
2245 struct resource *res;
2247 platform_set_drvdata(pdev, NULL);
2249 unregister_netdev(ndev);
2251 free_irq(ndev->irq, ndev);
2253 #ifdef SMC_USE_PXA_DMA
2254 if (ndev->dma != (unsigned char)-1)
2255 pxa_free_dma(ndev->dma);
2259 smc_release_datacs(pdev,ndev);
2260 smc_release_attrib(pdev);
2262 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
2264 platform_get_resource(pdev, IORESOURCE_MEM, 0);
2265 release_mem_region(res->start, SMC_IO_EXTENT);
2272 static int smc_drv_suspend(struct platform_device *dev, pm_message_t state)
2274 struct net_device *ndev = platform_get_drvdata(dev);
2277 if (netif_running(ndev)) {
2278 netif_device_detach(ndev);
2280 smc_phy_powerdown(ndev);
2286 static int smc_drv_resume(struct platform_device *dev)
2288 struct net_device *ndev = platform_get_drvdata(dev);
2291 struct smc_local *lp = netdev_priv(ndev);
2292 smc_enable_device(dev);
2293 if (netif_running(ndev)) {
2296 if (lp->phy_type != 0)
2297 smc_phy_configure(&lp->phy_configure);
2298 netif_device_attach(ndev);
2304 static struct platform_driver smc_driver = {
2305 .probe = smc_drv_probe,
2306 .remove = smc_drv_remove,
2307 .suspend = smc_drv_suspend,
2308 .resume = smc_drv_resume,
2314 static int __init smc_init(void)
2320 "%s: You shouldn't use auto-probing with insmod!\n",
2325 return platform_driver_register(&smc_driver);
2328 static void __exit smc_cleanup(void)
2330 platform_driver_unregister(&smc_driver);
2333 module_init(smc_init);
2334 module_exit(smc_cleanup);