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/config.h>
70 #include <linux/init.h>
71 #include <linux/module.h>
72 #include <linux/kernel.h>
73 #include <linux/sched.h>
74 #include <linux/slab.h>
75 #include <linux/delay.h>
76 #include <linux/interrupt.h>
77 #include <linux/errno.h>
78 #include <linux/ioport.h>
79 #include <linux/crc32.h>
80 #include <linux/platform_device.h>
81 #include <linux/spinlock.h>
82 #include <linux/ethtool.h>
83 #include <linux/mii.h>
84 #include <linux/workqueue.h>
86 #include <linux/netdevice.h>
87 #include <linux/etherdevice.h>
88 #include <linux/skbuff.h>
96 * the LAN91C111 can be at any of the following port addresses. To change,
97 * for a slightly different card, you can add it to the array. Keep in
98 * mind that the array must end in zero.
100 static unsigned int smc_portlist[] __initdata = {
101 0x200, 0x220, 0x240, 0x260, 0x280, 0x2A0, 0x2C0, 0x2E0,
102 0x300, 0x320, 0x340, 0x360, 0x380, 0x3A0, 0x3C0, 0x3E0, 0
106 # define SMC_IOADDR -1
108 static unsigned long io = SMC_IOADDR;
109 module_param(io, ulong, 0400);
110 MODULE_PARM_DESC(io, "I/O base address");
115 static int irq = SMC_IRQ;
116 module_param(irq, int, 0400);
117 MODULE_PARM_DESC(irq, "IRQ number");
119 #endif /* CONFIG_ISA */
122 # define SMC_NOWAIT 0
124 static int nowait = SMC_NOWAIT;
125 module_param(nowait, int, 0400);
126 MODULE_PARM_DESC(nowait, "set to 1 for no wait state");
129 * Transmit timeout, default 5 seconds.
131 static int watchdog = 1000;
132 module_param(watchdog, int, 0400);
133 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
135 MODULE_LICENSE("GPL");
138 * The internal workings of the driver. If you are changing anything
139 * here with the SMC stuff, you should have the datasheet and know
140 * what you are doing.
142 #define CARDNAME "smc91x"
145 * Use power-down feature of the chip
150 * Wait time for memory to be free. This probably shouldn't be
151 * tuned that much, as waiting for this means nothing else happens
154 #define MEMORY_WAIT_TIME 16
157 * The maximum number of processing loops allowed for each call to the
160 #define MAX_IRQ_LOOPS 8
163 * This selects whether TX packets are sent one by one to the SMC91x internal
164 * memory and throttled until transmission completes. This may prevent
165 * RX overruns a litle by keeping much of the memory free for RX packets
166 * but to the expense of reduced TX throughput and increased IRQ overhead.
167 * Note this is not a cure for a too slow data bus or too high IRQ latency.
169 #define THROTTLE_TX_PKTS 0
172 * The MII clock high/low times. 2x this number gives the MII clock period
173 * in microseconds. (was 50, but this gives 6.4ms for each MII transaction!)
177 /* store this information for the driver.. */
180 * If I have to wait until memory is available to send a
181 * packet, I will store the skbuff here, until I get the
182 * desired memory. Then, I'll send it out and free it.
184 struct sk_buff *pending_tx_skb;
185 struct tasklet_struct tx_task;
188 * these are things that the kernel wants me to keep, so users
189 * can find out semi-useless statistics of how well the card is
192 struct net_device_stats stats;
194 /* version/revision of the SMC91x chip */
197 /* Contains the current active transmission mode */
200 /* Contains the current active receive mode */
203 /* Contains the current active receive/phy mode */
210 struct mii_if_info mii;
213 struct work_struct phy_configure;
218 #ifdef SMC_CAN_USE_DATACS
222 #ifdef SMC_USE_PXA_DMA
223 /* DMA needs the physical address of the chip */
230 #define DBG(n, args...) \
232 if (SMC_DEBUG >= (n)) \
236 #define PRINTK(args...) printk(args)
238 #define DBG(n, args...) do { } while(0)
239 #define PRINTK(args...) printk(KERN_DEBUG args)
243 static void PRINT_PKT(u_char *buf, int length)
250 remainder = length % 16;
252 for (i = 0; i < lines ; i ++) {
254 for (cur = 0; cur < 8; cur++) {
258 printk("%02x%02x ", a, b);
262 for (i = 0; i < remainder/2 ; i++) {
266 printk("%02x%02x ", a, b);
271 #define PRINT_PKT(x...) do { } while(0)
275 /* this enables an interrupt in the interrupt mask register */
276 #define SMC_ENABLE_INT(x) do { \
277 unsigned char mask; \
278 spin_lock_irq(&lp->lock); \
279 mask = SMC_GET_INT_MASK(); \
281 SMC_SET_INT_MASK(mask); \
282 spin_unlock_irq(&lp->lock); \
285 /* this disables an interrupt from the interrupt mask register */
286 #define SMC_DISABLE_INT(x) do { \
287 unsigned char mask; \
288 spin_lock_irq(&lp->lock); \
289 mask = SMC_GET_INT_MASK(); \
291 SMC_SET_INT_MASK(mask); \
292 spin_unlock_irq(&lp->lock); \
296 * Wait while MMU is busy. This is usually in the order of a few nanosecs
297 * if at all, but let's avoid deadlocking the system if the hardware
298 * decides to go south.
300 #define SMC_WAIT_MMU_BUSY() do { \
301 if (unlikely(SMC_GET_MMU_CMD() & MC_BUSY)) { \
302 unsigned long timeout = jiffies + 2; \
303 while (SMC_GET_MMU_CMD() & MC_BUSY) { \
304 if (time_after(jiffies, timeout)) { \
305 printk("%s: timeout %s line %d\n", \
306 dev->name, __FILE__, __LINE__); \
316 * this does a soft reset on the device
318 static void smc_reset(struct net_device *dev)
320 struct smc_local *lp = netdev_priv(dev);
321 void __iomem *ioaddr = lp->base;
322 unsigned int ctl, cfg;
323 struct sk_buff *pending_skb;
325 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
327 /* Disable all interrupts, block TX tasklet */
328 spin_lock(&lp->lock);
331 pending_skb = lp->pending_tx_skb;
332 lp->pending_tx_skb = NULL;
333 spin_unlock(&lp->lock);
335 /* free any pending tx skb */
337 dev_kfree_skb(pending_skb);
338 lp->stats.tx_errors++;
339 lp->stats.tx_aborted_errors++;
343 * This resets the registers mostly to defaults, but doesn't
344 * affect EEPROM. That seems unnecessary
347 SMC_SET_RCR(RCR_SOFTRST);
350 * Setup the Configuration Register
351 * This is necessary because the CONFIG_REG is not affected
356 cfg = CONFIG_DEFAULT;
359 * Setup for fast accesses if requested. If the card/system
360 * can't handle it then there will be no recovery except for
361 * a hard reset or power cycle
364 cfg |= CONFIG_NO_WAIT;
367 * Release from possible power-down state
368 * Configuration register is not affected by Soft Reset
370 cfg |= CONFIG_EPH_POWER_EN;
374 /* this should pause enough for the chip to be happy */
376 * elaborate? What does the chip _need_? --jgarzik
378 * This seems to be undocumented, but something the original
379 * driver(s) have always done. Suspect undocumented timing
380 * info/determined empirically. --rmk
384 /* Disable transmit and receive functionality */
386 SMC_SET_RCR(RCR_CLEAR);
387 SMC_SET_TCR(TCR_CLEAR);
390 ctl = SMC_GET_CTL() | CTL_LE_ENABLE;
393 * Set the control register to automatically release successfully
394 * transmitted packets, to make the best use out of our limited
397 if(!THROTTLE_TX_PKTS)
398 ctl |= CTL_AUTO_RELEASE;
400 ctl &= ~CTL_AUTO_RELEASE;
405 SMC_SET_MMU_CMD(MC_RESET);
410 * Enable Interrupts, Receive, and Transmit
412 static void smc_enable(struct net_device *dev)
414 struct smc_local *lp = netdev_priv(dev);
415 void __iomem *ioaddr = lp->base;
418 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
420 /* see the header file for options in TCR/RCR DEFAULT */
422 SMC_SET_TCR(lp->tcr_cur_mode);
423 SMC_SET_RCR(lp->rcr_cur_mode);
426 SMC_SET_MAC_ADDR(dev->dev_addr);
428 /* now, enable interrupts */
429 mask = IM_EPH_INT|IM_RX_OVRN_INT|IM_RCV_INT;
430 if (lp->version >= (CHIP_91100 << 4))
433 SMC_SET_INT_MASK(mask);
436 * From this point the register bank must _NOT_ be switched away
437 * to something else than bank 2 without proper locking against
438 * races with any tasklet or interrupt handlers until smc_shutdown()
439 * or smc_reset() is called.
444 * this puts the device in an inactive state
446 static void smc_shutdown(struct net_device *dev)
448 struct smc_local *lp = netdev_priv(dev);
449 void __iomem *ioaddr = lp->base;
450 struct sk_buff *pending_skb;
452 DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__);
454 /* no more interrupts for me */
455 spin_lock(&lp->lock);
458 pending_skb = lp->pending_tx_skb;
459 lp->pending_tx_skb = NULL;
460 spin_unlock(&lp->lock);
462 dev_kfree_skb(pending_skb);
464 /* and tell the card to stay away from that nasty outside world */
466 SMC_SET_RCR(RCR_CLEAR);
467 SMC_SET_TCR(TCR_CLEAR);
470 /* finally, shut the chip down */
472 SMC_SET_CONFIG(SMC_GET_CONFIG() & ~CONFIG_EPH_POWER_EN);
477 * This is the procedure to handle the receipt of a packet.
479 static inline void smc_rcv(struct net_device *dev)
481 struct smc_local *lp = netdev_priv(dev);
482 void __iomem *ioaddr = lp->base;
483 unsigned int packet_number, status, packet_len;
485 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
487 packet_number = SMC_GET_RXFIFO();
488 if (unlikely(packet_number & RXFIFO_REMPTY)) {
489 PRINTK("%s: smc_rcv with nothing on FIFO.\n", dev->name);
493 /* read from start of packet */
494 SMC_SET_PTR(PTR_READ | PTR_RCV | PTR_AUTOINC);
496 /* First two words are status and packet length */
497 SMC_GET_PKT_HDR(status, packet_len);
498 packet_len &= 0x07ff; /* mask off top bits */
499 DBG(2, "%s: RX PNR 0x%x STATUS 0x%04x LENGTH 0x%04x (%d)\n",
500 dev->name, packet_number, status,
501 packet_len, packet_len);
503 if (unlikely(packet_len == 0 && !(status & RS_ERRORS))) {
504 printk(KERN_ERR "%s: bad memory timings: rxlen %u status %x\n",
505 dev->name, packet_len, status);
506 status |= RS_TOOSHORT;
509 if (unlikely(packet_len < 6 || status & RS_ERRORS)) {
510 if (status & RS_TOOLONG && packet_len <= (1514 + 4 + 6)) {
511 /* accept VLAN packets */
512 status &= ~RS_TOOLONG;
515 if (packet_len < 6) {
516 /* bloody hardware */
517 printk(KERN_ERR "%s: fubar (rxlen %u status %x\n",
518 dev->name, packet_len, status);
519 status |= RS_TOOSHORT;
522 SMC_SET_MMU_CMD(MC_RELEASE);
523 lp->stats.rx_errors++;
524 if (status & RS_ALGNERR)
525 lp->stats.rx_frame_errors++;
526 if (status & (RS_TOOSHORT | RS_TOOLONG))
527 lp->stats.rx_length_errors++;
528 if (status & RS_BADCRC)
529 lp->stats.rx_crc_errors++;
533 unsigned int data_len;
535 /* set multicast stats */
536 if (status & RS_MULTICAST)
537 lp->stats.multicast++;
540 * Actual payload is packet_len - 6 (or 5 if odd byte).
541 * We want skb_reserve(2) and the final ctrl word
542 * (2 bytes, possibly containing the payload odd byte).
543 * Furthermore, we add 2 bytes to allow rounding up to
544 * multiple of 4 bytes on 32 bit buses.
545 * Hence packet_len - 6 + 2 + 2 + 2.
547 skb = dev_alloc_skb(packet_len);
548 if (unlikely(skb == NULL)) {
549 printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
552 SMC_SET_MMU_CMD(MC_RELEASE);
553 lp->stats.rx_dropped++;
557 /* Align IP header to 32 bits */
560 /* BUG: the LAN91C111 rev A never sets this bit. Force it. */
561 if (lp->version == 0x90)
562 status |= RS_ODDFRAME;
565 * If odd length: packet_len - 5,
566 * otherwise packet_len - 6.
567 * With the trailing ctrl byte it's packet_len - 4.
569 data_len = packet_len - ((status & RS_ODDFRAME) ? 5 : 6);
570 data = skb_put(skb, data_len);
571 SMC_PULL_DATA(data, packet_len - 4);
574 SMC_SET_MMU_CMD(MC_RELEASE);
576 PRINT_PKT(data, packet_len - 4);
578 dev->last_rx = jiffies;
580 skb->protocol = eth_type_trans(skb, dev);
582 lp->stats.rx_packets++;
583 lp->stats.rx_bytes += data_len;
589 * On SMP we have the following problem:
591 * A = smc_hardware_send_pkt()
592 * B = smc_hard_start_xmit()
593 * C = smc_interrupt()
595 * A and B can never be executed simultaneously. However, at least on UP,
596 * it is possible (and even desirable) for C to interrupt execution of
597 * A or B in order to have better RX reliability and avoid overruns.
598 * C, just like A and B, must have exclusive access to the chip and
599 * each of them must lock against any other concurrent access.
600 * Unfortunately this is not possible to have C suspend execution of A or
601 * B taking place on another CPU. On UP this is no an issue since A and B
602 * are run from softirq context and C from hard IRQ context, and there is
603 * no other CPU where concurrent access can happen.
604 * If ever there is a way to force at least B and C to always be executed
605 * on the same CPU then we could use read/write locks to protect against
606 * any other concurrent access and C would always interrupt B. But life
607 * isn't that easy in a SMP world...
609 #define smc_special_trylock(lock) \
612 local_irq_disable(); \
613 __ret = spin_trylock(lock); \
615 local_irq_enable(); \
618 #define smc_special_lock(lock) spin_lock_irq(lock)
619 #define smc_special_unlock(lock) spin_unlock_irq(lock)
621 #define smc_special_trylock(lock) (1)
622 #define smc_special_lock(lock) do { } while (0)
623 #define smc_special_unlock(lock) do { } while (0)
627 * This is called to actually send a packet to the chip.
629 static void smc_hardware_send_pkt(unsigned long data)
631 struct net_device *dev = (struct net_device *)data;
632 struct smc_local *lp = netdev_priv(dev);
633 void __iomem *ioaddr = lp->base;
635 unsigned int packet_no, len;
638 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
640 if (!smc_special_trylock(&lp->lock)) {
641 netif_stop_queue(dev);
642 tasklet_schedule(&lp->tx_task);
646 skb = lp->pending_tx_skb;
647 if (unlikely(!skb)) {
648 smc_special_unlock(&lp->lock);
651 lp->pending_tx_skb = NULL;
653 packet_no = SMC_GET_AR();
654 if (unlikely(packet_no & AR_FAILED)) {
655 printk("%s: Memory allocation failed.\n", dev->name);
656 lp->stats.tx_errors++;
657 lp->stats.tx_fifo_errors++;
658 smc_special_unlock(&lp->lock);
662 /* point to the beginning of the packet */
663 SMC_SET_PN(packet_no);
664 SMC_SET_PTR(PTR_AUTOINC);
668 DBG(2, "%s: TX PNR 0x%x LENGTH 0x%04x (%d) BUF 0x%p\n",
669 dev->name, packet_no, len, len, buf);
673 * Send the packet length (+6 for status words, length, and ctl.
674 * The card will pad to 64 bytes with zeroes if packet is too small.
676 SMC_PUT_PKT_HDR(0, len + 6);
678 /* send the actual data */
679 SMC_PUSH_DATA(buf, len & ~1);
681 /* Send final ctl word with the last byte if there is one */
682 SMC_outw(((len & 1) ? (0x2000 | buf[len-1]) : 0), ioaddr, DATA_REG);
685 * If THROTTLE_TX_PKTS is set, we stop the queue here. This will
686 * have the effect of having at most one packet queued for TX
687 * in the chip's memory at all time.
689 * If THROTTLE_TX_PKTS is not set then the queue is stopped only
690 * when memory allocation (MC_ALLOC) does not succeed right away.
692 if (THROTTLE_TX_PKTS)
693 netif_stop_queue(dev);
695 /* queue the packet for TX */
696 SMC_SET_MMU_CMD(MC_ENQUEUE);
697 smc_special_unlock(&lp->lock);
699 dev->trans_start = jiffies;
700 lp->stats.tx_packets++;
701 lp->stats.tx_bytes += len;
703 SMC_ENABLE_INT(IM_TX_INT | IM_TX_EMPTY_INT);
705 done: if (!THROTTLE_TX_PKTS)
706 netif_wake_queue(dev);
712 * Since I am not sure if I will have enough room in the chip's ram
713 * to store the packet, I call this routine which either sends it
714 * now, or set the card to generates an interrupt when ready
717 static int smc_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
719 struct smc_local *lp = netdev_priv(dev);
720 void __iomem *ioaddr = lp->base;
721 unsigned int numPages, poll_count, status;
723 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
725 BUG_ON(lp->pending_tx_skb != NULL);
728 * The MMU wants the number of pages to be the number of 256 bytes
729 * 'pages', minus 1 (since a packet can't ever have 0 pages :))
731 * The 91C111 ignores the size bits, but earlier models don't.
733 * Pkt size for allocating is data length +6 (for additional status
734 * words, length and ctl)
736 * If odd size then last byte is included in ctl word.
738 numPages = ((skb->len & ~1) + (6 - 1)) >> 8;
739 if (unlikely(numPages > 7)) {
740 printk("%s: Far too big packet error.\n", dev->name);
741 lp->stats.tx_errors++;
742 lp->stats.tx_dropped++;
747 smc_special_lock(&lp->lock);
749 /* now, try to allocate the memory */
750 SMC_SET_MMU_CMD(MC_ALLOC | numPages);
753 * Poll the chip for a short amount of time in case the
754 * allocation succeeds quickly.
756 poll_count = MEMORY_WAIT_TIME;
758 status = SMC_GET_INT();
759 if (status & IM_ALLOC_INT) {
760 SMC_ACK_INT(IM_ALLOC_INT);
763 } while (--poll_count);
765 smc_special_unlock(&lp->lock);
767 lp->pending_tx_skb = skb;
769 /* oh well, wait until the chip finds memory later */
770 netif_stop_queue(dev);
771 DBG(2, "%s: TX memory allocation deferred.\n", dev->name);
772 SMC_ENABLE_INT(IM_ALLOC_INT);
775 * Allocation succeeded: push packet to the chip's own memory
778 smc_hardware_send_pkt((unsigned long)dev);
785 * This handles a TX interrupt, which is only called when:
786 * - a TX error occurred, or
787 * - CTL_AUTO_RELEASE is not set and TX of a packet completed.
789 static void smc_tx(struct net_device *dev)
791 struct smc_local *lp = netdev_priv(dev);
792 void __iomem *ioaddr = lp->base;
793 unsigned int saved_packet, packet_no, tx_status, pkt_len;
795 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
797 /* If the TX FIFO is empty then nothing to do */
798 packet_no = SMC_GET_TXFIFO();
799 if (unlikely(packet_no & TXFIFO_TEMPTY)) {
800 PRINTK("%s: smc_tx with nothing on FIFO.\n", dev->name);
804 /* select packet to read from */
805 saved_packet = SMC_GET_PN();
806 SMC_SET_PN(packet_no);
808 /* read the first word (status word) from this packet */
809 SMC_SET_PTR(PTR_AUTOINC | PTR_READ);
810 SMC_GET_PKT_HDR(tx_status, pkt_len);
811 DBG(2, "%s: TX STATUS 0x%04x PNR 0x%02x\n",
812 dev->name, tx_status, packet_no);
814 if (!(tx_status & ES_TX_SUC))
815 lp->stats.tx_errors++;
817 if (tx_status & ES_LOSTCARR)
818 lp->stats.tx_carrier_errors++;
820 if (tx_status & (ES_LATCOL | ES_16COL)) {
821 PRINTK("%s: %s occurred on last xmit\n", dev->name,
822 (tx_status & ES_LATCOL) ?
823 "late collision" : "too many collisions");
824 lp->stats.tx_window_errors++;
825 if (!(lp->stats.tx_window_errors & 63) && net_ratelimit()) {
826 printk(KERN_INFO "%s: unexpectedly large number of "
827 "bad collisions. Please check duplex "
828 "setting.\n", dev->name);
832 /* kill the packet */
834 SMC_SET_MMU_CMD(MC_FREEPKT);
836 /* Don't restore Packet Number Reg until busy bit is cleared */
838 SMC_SET_PN(saved_packet);
840 /* re-enable transmit */
842 SMC_SET_TCR(lp->tcr_cur_mode);
847 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
849 static void smc_mii_out(struct net_device *dev, unsigned int val, int bits)
851 struct smc_local *lp = netdev_priv(dev);
852 void __iomem *ioaddr = lp->base;
853 unsigned int mii_reg, mask;
855 mii_reg = SMC_GET_MII() & ~(MII_MCLK | MII_MDOE | MII_MDO);
858 for (mask = 1 << (bits - 1); mask; mask >>= 1) {
864 SMC_SET_MII(mii_reg);
866 SMC_SET_MII(mii_reg | MII_MCLK);
871 static unsigned int smc_mii_in(struct net_device *dev, int bits)
873 struct smc_local *lp = netdev_priv(dev);
874 void __iomem *ioaddr = lp->base;
875 unsigned int mii_reg, mask, val;
877 mii_reg = SMC_GET_MII() & ~(MII_MCLK | MII_MDOE | MII_MDO);
878 SMC_SET_MII(mii_reg);
880 for (mask = 1 << (bits - 1), val = 0; mask; mask >>= 1) {
881 if (SMC_GET_MII() & MII_MDI)
884 SMC_SET_MII(mii_reg);
886 SMC_SET_MII(mii_reg | MII_MCLK);
894 * Reads a register from the MII Management serial interface
896 static int smc_phy_read(struct net_device *dev, int phyaddr, int phyreg)
898 struct smc_local *lp = netdev_priv(dev);
899 void __iomem *ioaddr = lp->base;
900 unsigned int phydata;
905 smc_mii_out(dev, 0xffffffff, 32);
907 /* Start code (01) + read (10) + phyaddr + phyreg */
908 smc_mii_out(dev, 6 << 10 | phyaddr << 5 | phyreg, 14);
910 /* Turnaround (2bits) + phydata */
911 phydata = smc_mii_in(dev, 18);
913 /* Return to idle state */
914 SMC_SET_MII(SMC_GET_MII() & ~(MII_MCLK|MII_MDOE|MII_MDO));
916 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
917 __FUNCTION__, phyaddr, phyreg, phydata);
924 * Writes a register to the MII Management serial interface
926 static void smc_phy_write(struct net_device *dev, int phyaddr, int phyreg,
929 struct smc_local *lp = netdev_priv(dev);
930 void __iomem *ioaddr = lp->base;
935 smc_mii_out(dev, 0xffffffff, 32);
937 /* Start code (01) + write (01) + phyaddr + phyreg + turnaround + phydata */
938 smc_mii_out(dev, 5 << 28 | phyaddr << 23 | phyreg << 18 | 2 << 16 | phydata, 32);
940 /* Return to idle state */
941 SMC_SET_MII(SMC_GET_MII() & ~(MII_MCLK|MII_MDOE|MII_MDO));
943 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
944 __FUNCTION__, phyaddr, phyreg, phydata);
950 * Finds and reports the PHY address
952 static void smc_phy_detect(struct net_device *dev)
954 struct smc_local *lp = netdev_priv(dev);
957 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
962 * Scan all 32 PHY addresses if necessary, starting at
963 * PHY#1 to PHY#31, and then PHY#0 last.
965 for (phyaddr = 1; phyaddr < 33; ++phyaddr) {
966 unsigned int id1, id2;
968 /* Read the PHY identifiers */
969 id1 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID1);
970 id2 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID2);
972 DBG(3, "%s: phy_id1=0x%x, phy_id2=0x%x\n",
973 dev->name, id1, id2);
975 /* Make sure it is a valid identifier */
976 if (id1 != 0x0000 && id1 != 0xffff && id1 != 0x8000 &&
977 id2 != 0x0000 && id2 != 0xffff && id2 != 0x8000) {
978 /* Save the PHY's address */
979 lp->mii.phy_id = phyaddr & 31;
980 lp->phy_type = id1 << 16 | id2;
987 * Sets the PHY to a configuration as determined by the user
989 static int smc_phy_fixed(struct net_device *dev)
991 struct smc_local *lp = netdev_priv(dev);
992 void __iomem *ioaddr = lp->base;
993 int phyaddr = lp->mii.phy_id;
996 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
998 /* Enter Link Disable state */
999 cfg1 = smc_phy_read(dev, phyaddr, PHY_CFG1_REG);
1000 cfg1 |= PHY_CFG1_LNKDIS;
1001 smc_phy_write(dev, phyaddr, PHY_CFG1_REG, cfg1);
1004 * Set our fixed capabilities
1005 * Disable auto-negotiation
1009 if (lp->ctl_rfduplx)
1010 bmcr |= BMCR_FULLDPLX;
1012 if (lp->ctl_rspeed == 100)
1013 bmcr |= BMCR_SPEED100;
1015 /* Write our capabilities to the phy control register */
1016 smc_phy_write(dev, phyaddr, MII_BMCR, bmcr);
1018 /* Re-Configure the Receive/Phy Control register */
1020 SMC_SET_RPC(lp->rpc_cur_mode);
1027 * smc_phy_reset - reset the phy
1031 * Issue a software reset for the specified PHY and
1032 * wait up to 100ms for the reset to complete. We should
1033 * not access the PHY for 50ms after issuing the reset.
1035 * The time to wait appears to be dependent on the PHY.
1037 * Must be called with lp->lock locked.
1039 static int smc_phy_reset(struct net_device *dev, int phy)
1041 struct smc_local *lp = netdev_priv(dev);
1045 smc_phy_write(dev, phy, MII_BMCR, BMCR_RESET);
1047 for (timeout = 2; timeout; timeout--) {
1048 spin_unlock_irq(&lp->lock);
1050 spin_lock_irq(&lp->lock);
1052 bmcr = smc_phy_read(dev, phy, MII_BMCR);
1053 if (!(bmcr & BMCR_RESET))
1057 return bmcr & BMCR_RESET;
1061 * smc_phy_powerdown - powerdown phy
1064 * Power down the specified PHY
1066 static void smc_phy_powerdown(struct net_device *dev)
1068 struct smc_local *lp = netdev_priv(dev);
1070 int phy = lp->mii.phy_id;
1072 if (lp->phy_type == 0)
1075 /* We need to ensure that no calls to smc_phy_configure are
1078 flush_scheduled_work() cannot be called because we are
1079 running with the netlink semaphore held (from
1080 devinet_ioctl()) and the pending work queue contains
1081 linkwatch_event() (scheduled by netif_carrier_off()
1082 above). linkwatch_event() also wants the netlink semaphore.
1084 while(lp->work_pending)
1087 bmcr = smc_phy_read(dev, phy, MII_BMCR);
1088 smc_phy_write(dev, phy, MII_BMCR, bmcr | BMCR_PDOWN);
1092 * smc_phy_check_media - check the media status and adjust TCR
1094 * @init: set true for initialisation
1096 * Select duplex mode depending on negotiation state. This
1097 * also updates our carrier state.
1099 static void smc_phy_check_media(struct net_device *dev, int init)
1101 struct smc_local *lp = netdev_priv(dev);
1102 void __iomem *ioaddr = lp->base;
1104 if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
1105 /* duplex state has changed */
1106 if (lp->mii.full_duplex) {
1107 lp->tcr_cur_mode |= TCR_SWFDUP;
1109 lp->tcr_cur_mode &= ~TCR_SWFDUP;
1113 SMC_SET_TCR(lp->tcr_cur_mode);
1118 * Configures the specified PHY through the MII management interface
1119 * using Autonegotiation.
1120 * Calls smc_phy_fixed() if the user has requested a certain config.
1121 * If RPC ANEG bit is set, the media selection is dependent purely on
1122 * the selection by the MII (either in the MII BMCR reg or the result
1123 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
1124 * is controlled by the RPC SPEED and RPC DPLX bits.
1126 static void smc_phy_configure(void *data)
1128 struct net_device *dev = data;
1129 struct smc_local *lp = netdev_priv(dev);
1130 void __iomem *ioaddr = lp->base;
1131 int phyaddr = lp->mii.phy_id;
1132 int my_phy_caps; /* My PHY capabilities */
1133 int my_ad_caps; /* My Advertised capabilities */
1136 DBG(3, "%s:smc_program_phy()\n", dev->name);
1138 spin_lock_irq(&lp->lock);
1141 * We should not be called if phy_type is zero.
1143 if (lp->phy_type == 0)
1144 goto smc_phy_configure_exit;
1146 if (smc_phy_reset(dev, phyaddr)) {
1147 printk("%s: PHY reset timed out\n", dev->name);
1148 goto smc_phy_configure_exit;
1152 * Enable PHY Interrupts (for register 18)
1153 * Interrupts listed here are disabled
1155 smc_phy_write(dev, phyaddr, PHY_MASK_REG,
1156 PHY_INT_LOSSSYNC | PHY_INT_CWRD | PHY_INT_SSD |
1157 PHY_INT_ESD | PHY_INT_RPOL | PHY_INT_JAB |
1158 PHY_INT_SPDDET | PHY_INT_DPLXDET);
1160 /* Configure the Receive/Phy Control register */
1162 SMC_SET_RPC(lp->rpc_cur_mode);
1164 /* If the user requested no auto neg, then go set his request */
1165 if (lp->mii.force_media) {
1167 goto smc_phy_configure_exit;
1170 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
1171 my_phy_caps = smc_phy_read(dev, phyaddr, MII_BMSR);
1173 if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
1174 printk(KERN_INFO "Auto negotiation NOT supported\n");
1176 goto smc_phy_configure_exit;
1179 my_ad_caps = ADVERTISE_CSMA; /* I am CSMA capable */
1181 if (my_phy_caps & BMSR_100BASE4)
1182 my_ad_caps |= ADVERTISE_100BASE4;
1183 if (my_phy_caps & BMSR_100FULL)
1184 my_ad_caps |= ADVERTISE_100FULL;
1185 if (my_phy_caps & BMSR_100HALF)
1186 my_ad_caps |= ADVERTISE_100HALF;
1187 if (my_phy_caps & BMSR_10FULL)
1188 my_ad_caps |= ADVERTISE_10FULL;
1189 if (my_phy_caps & BMSR_10HALF)
1190 my_ad_caps |= ADVERTISE_10HALF;
1192 /* Disable capabilities not selected by our user */
1193 if (lp->ctl_rspeed != 100)
1194 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
1196 if (!lp->ctl_rfduplx)
1197 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
1199 /* Update our Auto-Neg Advertisement Register */
1200 smc_phy_write(dev, phyaddr, MII_ADVERTISE, my_ad_caps);
1201 lp->mii.advertising = my_ad_caps;
1204 * Read the register back. Without this, it appears that when
1205 * auto-negotiation is restarted, sometimes it isn't ready and
1206 * the link does not come up.
1208 status = smc_phy_read(dev, phyaddr, MII_ADVERTISE);
1210 DBG(2, "%s: phy caps=%x\n", dev->name, my_phy_caps);
1211 DBG(2, "%s: phy advertised caps=%x\n", dev->name, my_ad_caps);
1213 /* Restart auto-negotiation process in order to advertise my caps */
1214 smc_phy_write(dev, phyaddr, MII_BMCR, BMCR_ANENABLE | BMCR_ANRESTART);
1216 smc_phy_check_media(dev, 1);
1218 smc_phy_configure_exit:
1220 spin_unlock_irq(&lp->lock);
1221 lp->work_pending = 0;
1227 * Purpose: Handle interrupts relating to PHY register 18. This is
1228 * called from the "hard" interrupt handler under our private spinlock.
1230 static void smc_phy_interrupt(struct net_device *dev)
1232 struct smc_local *lp = netdev_priv(dev);
1233 int phyaddr = lp->mii.phy_id;
1236 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1238 if (lp->phy_type == 0)
1242 smc_phy_check_media(dev, 0);
1244 /* Read PHY Register 18, Status Output */
1245 phy18 = smc_phy_read(dev, phyaddr, PHY_INT_REG);
1246 if ((phy18 & PHY_INT_INT) == 0)
1251 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1253 static void smc_10bt_check_media(struct net_device *dev, int init)
1255 struct smc_local *lp = netdev_priv(dev);
1256 void __iomem *ioaddr = lp->base;
1257 unsigned int old_carrier, new_carrier;
1259 old_carrier = netif_carrier_ok(dev) ? 1 : 0;
1262 new_carrier = (SMC_GET_EPH_STATUS() & ES_LINK_OK) ? 1 : 0;
1265 if (init || (old_carrier != new_carrier)) {
1267 netif_carrier_off(dev);
1269 netif_carrier_on(dev);
1271 if (netif_msg_link(lp))
1272 printk(KERN_INFO "%s: link %s\n", dev->name,
1273 new_carrier ? "up" : "down");
1277 static void smc_eph_interrupt(struct net_device *dev)
1279 struct smc_local *lp = netdev_priv(dev);
1280 void __iomem *ioaddr = lp->base;
1283 smc_10bt_check_media(dev, 0);
1286 ctl = SMC_GET_CTL();
1287 SMC_SET_CTL(ctl & ~CTL_LE_ENABLE);
1293 * This is the main routine of the driver, to handle the device when
1294 * it needs some attention.
1296 static irqreturn_t smc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1298 struct net_device *dev = dev_id;
1299 struct smc_local *lp = netdev_priv(dev);
1300 void __iomem *ioaddr = lp->base;
1301 int status, mask, timeout, card_stats;
1304 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
1306 spin_lock(&lp->lock);
1308 /* A preamble may be used when there is a potential race
1309 * between the interruptible transmit functions and this
1311 SMC_INTERRUPT_PREAMBLE;
1313 saved_pointer = SMC_GET_PTR();
1314 mask = SMC_GET_INT_MASK();
1315 SMC_SET_INT_MASK(0);
1317 /* set a timeout value, so I don't stay here forever */
1318 timeout = MAX_IRQ_LOOPS;
1321 status = SMC_GET_INT();
1323 DBG(2, "%s: INT 0x%02x MASK 0x%02x MEM 0x%04x FIFO 0x%04x\n",
1324 dev->name, status, mask,
1325 ({ int meminfo; SMC_SELECT_BANK(0);
1326 meminfo = SMC_GET_MIR();
1327 SMC_SELECT_BANK(2); meminfo; }),
1334 if (status & IM_TX_INT) {
1335 /* do this before RX as it will free memory quickly */
1336 DBG(3, "%s: TX int\n", dev->name);
1338 SMC_ACK_INT(IM_TX_INT);
1339 if (THROTTLE_TX_PKTS)
1340 netif_wake_queue(dev);
1341 } else if (status & IM_RCV_INT) {
1342 DBG(3, "%s: RX irq\n", dev->name);
1344 } else if (status & IM_ALLOC_INT) {
1345 DBG(3, "%s: Allocation irq\n", dev->name);
1346 tasklet_hi_schedule(&lp->tx_task);
1347 mask &= ~IM_ALLOC_INT;
1348 } else if (status & IM_TX_EMPTY_INT) {
1349 DBG(3, "%s: TX empty\n", dev->name);
1350 mask &= ~IM_TX_EMPTY_INT;
1354 card_stats = SMC_GET_COUNTER();
1357 /* single collisions */
1358 lp->stats.collisions += card_stats & 0xF;
1361 /* multiple collisions */
1362 lp->stats.collisions += card_stats & 0xF;
1363 } else if (status & IM_RX_OVRN_INT) {
1364 DBG(1, "%s: RX overrun (EPH_ST 0x%04x)\n", dev->name,
1365 ({ int eph_st; SMC_SELECT_BANK(0);
1366 eph_st = SMC_GET_EPH_STATUS();
1367 SMC_SELECT_BANK(2); eph_st; }) );
1368 SMC_ACK_INT(IM_RX_OVRN_INT);
1369 lp->stats.rx_errors++;
1370 lp->stats.rx_fifo_errors++;
1371 } else if (status & IM_EPH_INT) {
1372 smc_eph_interrupt(dev);
1373 } else if (status & IM_MDINT) {
1374 SMC_ACK_INT(IM_MDINT);
1375 smc_phy_interrupt(dev);
1376 } else if (status & IM_ERCV_INT) {
1377 SMC_ACK_INT(IM_ERCV_INT);
1378 PRINTK("%s: UNSUPPORTED: ERCV INTERRUPT \n", dev->name);
1380 } while (--timeout);
1382 /* restore register states */
1383 SMC_SET_PTR(saved_pointer);
1384 SMC_SET_INT_MASK(mask);
1385 spin_unlock(&lp->lock);
1387 if (timeout == MAX_IRQ_LOOPS)
1388 PRINTK("%s: spurious interrupt (mask = 0x%02x)\n",
1390 DBG(3, "%s: Interrupt done (%d loops)\n",
1391 dev->name, MAX_IRQ_LOOPS - timeout);
1394 * We return IRQ_HANDLED unconditionally here even if there was
1395 * nothing to do. There is a possibility that a packet might
1396 * get enqueued into the chip right after TX_EMPTY_INT is raised
1397 * but just before the CPU acknowledges the IRQ.
1398 * Better take an unneeded IRQ in some occasions than complexifying
1399 * the code for all cases.
1404 #ifdef CONFIG_NET_POLL_CONTROLLER
1406 * Polling receive - used by netconsole and other diagnostic tools
1407 * to allow network i/o with interrupts disabled.
1409 static void smc_poll_controller(struct net_device *dev)
1411 disable_irq(dev->irq);
1412 smc_interrupt(dev->irq, dev, NULL);
1413 enable_irq(dev->irq);
1417 /* Our watchdog timed out. Called by the networking layer */
1418 static void smc_timeout(struct net_device *dev)
1420 struct smc_local *lp = netdev_priv(dev);
1421 void __iomem *ioaddr = lp->base;
1422 int status, mask, eph_st, meminfo, fifo;
1424 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1426 spin_lock_irq(&lp->lock);
1427 status = SMC_GET_INT();
1428 mask = SMC_GET_INT_MASK();
1429 fifo = SMC_GET_FIFO();
1431 eph_st = SMC_GET_EPH_STATUS();
1432 meminfo = SMC_GET_MIR();
1434 spin_unlock_irq(&lp->lock);
1435 PRINTK( "%s: TX timeout (INT 0x%02x INTMASK 0x%02x "
1436 "MEM 0x%04x FIFO 0x%04x EPH_ST 0x%04x)\n",
1437 dev->name, status, mask, meminfo, fifo, eph_st );
1443 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1444 * smc_phy_configure() calls msleep() which calls schedule_timeout()
1445 * which calls schedule(). Hence we use a work queue.
1447 if (lp->phy_type != 0) {
1448 if (schedule_work(&lp->phy_configure)) {
1449 lp->work_pending = 1;
1453 /* We can accept TX packets again */
1454 dev->trans_start = jiffies;
1455 netif_wake_queue(dev);
1459 * This routine will, depending on the values passed to it,
1460 * either make it accept multicast packets, go into
1461 * promiscuous mode (for TCPDUMP and cousins) or accept
1462 * a select set of multicast packets
1464 static void smc_set_multicast_list(struct net_device *dev)
1466 struct smc_local *lp = netdev_priv(dev);
1467 void __iomem *ioaddr = lp->base;
1468 unsigned char multicast_table[8];
1469 int update_multicast = 0;
1471 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1473 if (dev->flags & IFF_PROMISC) {
1474 DBG(2, "%s: RCR_PRMS\n", dev->name);
1475 lp->rcr_cur_mode |= RCR_PRMS;
1478 /* BUG? I never disable promiscuous mode if multicasting was turned on.
1479 Now, I turn off promiscuous mode, but I don't do anything to multicasting
1480 when promiscuous mode is turned on.
1484 * Here, I am setting this to accept all multicast packets.
1485 * I don't need to zero the multicast table, because the flag is
1486 * checked before the table is
1488 else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) {
1489 DBG(2, "%s: RCR_ALMUL\n", dev->name);
1490 lp->rcr_cur_mode |= RCR_ALMUL;
1494 * This sets the internal hardware table to filter out unwanted
1495 * multicast packets before they take up memory.
1497 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1498 * address are the offset into the table. If that bit is 1, then the
1499 * multicast packet is accepted. Otherwise, it's dropped silently.
1501 * To use the 6 bits as an offset into the table, the high 3 bits are
1502 * the number of the 8 bit register, while the low 3 bits are the bit
1503 * within that register.
1505 else if (dev->mc_count) {
1507 struct dev_mc_list *cur_addr;
1509 /* table for flipping the order of 3 bits */
1510 static const unsigned char invert3[] = {0, 4, 2, 6, 1, 5, 3, 7};
1512 /* start with a table of all zeros: reject all */
1513 memset(multicast_table, 0, sizeof(multicast_table));
1515 cur_addr = dev->mc_list;
1516 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
1519 /* do we have a pointer here? */
1522 /* make sure this is a multicast address -
1523 shouldn't this be a given if we have it here ? */
1524 if (!(*cur_addr->dmi_addr & 1))
1527 /* only use the low order bits */
1528 position = crc32_le(~0, cur_addr->dmi_addr, 6) & 0x3f;
1530 /* do some messy swapping to put the bit in the right spot */
1531 multicast_table[invert3[position&7]] |=
1532 (1<<invert3[(position>>3)&7]);
1535 /* be sure I get rid of flags I might have set */
1536 lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL);
1538 /* now, the table can be loaded into the chipset */
1539 update_multicast = 1;
1541 DBG(2, "%s: ~(RCR_PRMS|RCR_ALMUL)\n", dev->name);
1542 lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL);
1545 * since I'm disabling all multicast entirely, I need to
1546 * clear the multicast list
1548 memset(multicast_table, 0, sizeof(multicast_table));
1549 update_multicast = 1;
1552 spin_lock_irq(&lp->lock);
1554 SMC_SET_RCR(lp->rcr_cur_mode);
1555 if (update_multicast) {
1557 SMC_SET_MCAST(multicast_table);
1560 spin_unlock_irq(&lp->lock);
1565 * Open and Initialize the board
1567 * Set up everything, reset the card, etc..
1570 smc_open(struct net_device *dev)
1572 struct smc_local *lp = netdev_priv(dev);
1574 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1577 * Check that the address is valid. If its not, refuse
1578 * to bring the device up. The user must specify an
1579 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1581 if (!is_valid_ether_addr(dev->dev_addr)) {
1582 PRINTK("%s: no valid ethernet hw addr\n", __FUNCTION__);
1586 /* Setup the default Register Modes */
1587 lp->tcr_cur_mode = TCR_DEFAULT;
1588 lp->rcr_cur_mode = RCR_DEFAULT;
1589 lp->rpc_cur_mode = RPC_DEFAULT;
1592 * If we are not using a MII interface, we need to
1593 * monitor our own carrier signal to detect faults.
1595 if (lp->phy_type == 0)
1596 lp->tcr_cur_mode |= TCR_MON_CSN;
1598 /* reset the hardware */
1602 /* Configure the PHY, initialize the link state */
1603 if (lp->phy_type != 0)
1604 smc_phy_configure(dev);
1606 spin_lock_irq(&lp->lock);
1607 smc_10bt_check_media(dev, 1);
1608 spin_unlock_irq(&lp->lock);
1611 netif_start_queue(dev);
1618 * this makes the board clean up everything that it can
1619 * and not talk to the outside world. Caused by
1620 * an 'ifconfig ethX down'
1622 static int smc_close(struct net_device *dev)
1624 struct smc_local *lp = netdev_priv(dev);
1626 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1628 netif_stop_queue(dev);
1629 netif_carrier_off(dev);
1631 /* clear everything */
1633 tasklet_kill(&lp->tx_task);
1634 smc_phy_powerdown(dev);
1639 * Get the current statistics.
1640 * This may be called with the card open or closed.
1642 static struct net_device_stats *smc_query_statistics(struct net_device *dev)
1644 struct smc_local *lp = netdev_priv(dev);
1646 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1655 smc_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1657 struct smc_local *lp = netdev_priv(dev);
1663 if (lp->phy_type != 0) {
1664 spin_lock_irq(&lp->lock);
1665 ret = mii_ethtool_gset(&lp->mii, cmd);
1666 spin_unlock_irq(&lp->lock);
1668 cmd->supported = SUPPORTED_10baseT_Half |
1669 SUPPORTED_10baseT_Full |
1670 SUPPORTED_TP | SUPPORTED_AUI;
1672 if (lp->ctl_rspeed == 10)
1673 cmd->speed = SPEED_10;
1674 else if (lp->ctl_rspeed == 100)
1675 cmd->speed = SPEED_100;
1677 cmd->autoneg = AUTONEG_DISABLE;
1678 cmd->transceiver = XCVR_INTERNAL;
1680 cmd->duplex = lp->tcr_cur_mode & TCR_SWFDUP ? DUPLEX_FULL : DUPLEX_HALF;
1689 smc_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1691 struct smc_local *lp = netdev_priv(dev);
1694 if (lp->phy_type != 0) {
1695 spin_lock_irq(&lp->lock);
1696 ret = mii_ethtool_sset(&lp->mii, cmd);
1697 spin_unlock_irq(&lp->lock);
1699 if (cmd->autoneg != AUTONEG_DISABLE ||
1700 cmd->speed != SPEED_10 ||
1701 (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1702 (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1705 // lp->port = cmd->port;
1706 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1708 // if (netif_running(dev))
1709 // smc_set_port(dev);
1718 smc_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1720 strncpy(info->driver, CARDNAME, sizeof(info->driver));
1721 strncpy(info->version, version, sizeof(info->version));
1722 strncpy(info->bus_info, dev->class_dev.dev->bus_id, sizeof(info->bus_info));
1725 static int smc_ethtool_nwayreset(struct net_device *dev)
1727 struct smc_local *lp = netdev_priv(dev);
1730 if (lp->phy_type != 0) {
1731 spin_lock_irq(&lp->lock);
1732 ret = mii_nway_restart(&lp->mii);
1733 spin_unlock_irq(&lp->lock);
1739 static u32 smc_ethtool_getmsglevel(struct net_device *dev)
1741 struct smc_local *lp = netdev_priv(dev);
1742 return lp->msg_enable;
1745 static void smc_ethtool_setmsglevel(struct net_device *dev, u32 level)
1747 struct smc_local *lp = netdev_priv(dev);
1748 lp->msg_enable = level;
1751 static struct ethtool_ops smc_ethtool_ops = {
1752 .get_settings = smc_ethtool_getsettings,
1753 .set_settings = smc_ethtool_setsettings,
1754 .get_drvinfo = smc_ethtool_getdrvinfo,
1756 .get_msglevel = smc_ethtool_getmsglevel,
1757 .set_msglevel = smc_ethtool_setmsglevel,
1758 .nway_reset = smc_ethtool_nwayreset,
1759 .get_link = ethtool_op_get_link,
1760 // .get_eeprom = smc_ethtool_geteeprom,
1761 // .set_eeprom = smc_ethtool_seteeprom,
1767 * This routine has a simple purpose -- make the SMC chip generate an
1768 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1771 * does this still work?
1773 * I just deleted auto_irq.c, since it was never built...
1776 static int __init smc_findirq(void __iomem *ioaddr)
1779 unsigned long cookie;
1781 DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__);
1783 cookie = probe_irq_on();
1786 * What I try to do here is trigger an ALLOC_INT. This is done
1787 * by allocating a small chunk of memory, which will give an interrupt
1790 /* enable ALLOCation interrupts ONLY */
1792 SMC_SET_INT_MASK(IM_ALLOC_INT);
1795 * Allocate 512 bytes of memory. Note that the chip was just
1796 * reset so all the memory is available
1798 SMC_SET_MMU_CMD(MC_ALLOC | 1);
1801 * Wait until positive that the interrupt has been generated
1806 int_status = SMC_GET_INT();
1807 if (int_status & IM_ALLOC_INT)
1808 break; /* got the interrupt */
1809 } while (--timeout);
1812 * there is really nothing that I can do here if timeout fails,
1813 * as autoirq_report will return a 0 anyway, which is what I
1814 * want in this case. Plus, the clean up is needed in both
1818 /* and disable all interrupts again */
1819 SMC_SET_INT_MASK(0);
1821 /* and return what I found */
1822 return probe_irq_off(cookie);
1826 * Function: smc_probe(unsigned long ioaddr)
1829 * Tests to see if a given ioaddr points to an SMC91x chip.
1830 * Returns a 0 on success
1833 * (1) see if the high byte of BANK_SELECT is 0x33
1834 * (2) compare the ioaddr with the base register's address
1835 * (3) see if I recognize the chip ID in the appropriate register
1837 * Here I do typical initialization tasks.
1839 * o Initialize the structure if needed
1840 * o print out my vanity message if not done so already
1841 * o print out what type of hardware is detected
1842 * o print out the ethernet address
1844 * o set up my private data
1845 * o configure the dev structure with my subroutines
1846 * o actually GRAB the irq.
1849 static int __init smc_probe(struct net_device *dev, void __iomem *ioaddr)
1851 struct smc_local *lp = netdev_priv(dev);
1852 static int version_printed = 0;
1854 unsigned int val, revision_register;
1855 const char *version_string;
1857 DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__);
1859 /* First, see if the high byte is 0x33 */
1860 val = SMC_CURRENT_BANK();
1861 DBG(2, "%s: bank signature probe returned 0x%04x\n", CARDNAME, val);
1862 if ((val & 0xFF00) != 0x3300) {
1863 if ((val & 0xFF) == 0x33) {
1865 "%s: Detected possible byte-swapped interface"
1866 " at IOADDR %p\n", CARDNAME, ioaddr);
1873 * The above MIGHT indicate a device, but I need to write to
1874 * further test this.
1877 val = SMC_CURRENT_BANK();
1878 if ((val & 0xFF00) != 0x3300) {
1884 * well, we've already written once, so hopefully another
1885 * time won't hurt. This time, I need to switch the bank
1886 * register to bank 1, so I can access the base address
1890 val = SMC_GET_BASE();
1891 val = ((val & 0x1F00) >> 3) << SMC_IO_SHIFT;
1892 if (((unsigned int)ioaddr & (0x3e0 << SMC_IO_SHIFT)) != val) {
1893 printk("%s: IOADDR %p doesn't match configuration (%x).\n",
1894 CARDNAME, ioaddr, val);
1898 * check if the revision register is something that I
1899 * recognize. These might need to be added to later,
1900 * as future revisions could be added.
1903 revision_register = SMC_GET_REV();
1904 DBG(2, "%s: revision = 0x%04x\n", CARDNAME, revision_register);
1905 version_string = chip_ids[ (revision_register >> 4) & 0xF];
1906 if (!version_string || (revision_register & 0xff00) != 0x3300) {
1907 /* I don't recognize this chip, so... */
1908 printk("%s: IO %p: Unrecognized revision register 0x%04x"
1909 ", Contact author.\n", CARDNAME,
1910 ioaddr, revision_register);
1916 /* At this point I'll assume that the chip is an SMC91x. */
1917 if (version_printed++ == 0)
1918 printk("%s", version);
1920 /* fill in some of the fields */
1921 dev->base_addr = (unsigned long)ioaddr;
1923 lp->version = revision_register & 0xff;
1924 spin_lock_init(&lp->lock);
1926 /* Get the MAC address */
1928 SMC_GET_MAC_ADDR(dev->dev_addr);
1930 /* now, reset the chip, and put it into a known state */
1934 * If dev->irq is 0, then the device has to be banged on to see
1937 * This banging doesn't always detect the IRQ, for unknown reasons.
1938 * a workaround is to reset the chip and try again.
1940 * Interestingly, the DOS packet driver *SETS* the IRQ on the card to
1941 * be what is requested on the command line. I don't do that, mostly
1942 * because the card that I have uses a non-standard method of accessing
1943 * the IRQs, and because this _should_ work in most configurations.
1945 * Specifying an IRQ is done with the assumption that the user knows
1946 * what (s)he is doing. No checking is done!!!!
1953 dev->irq = smc_findirq(ioaddr);
1956 /* kick the card and try again */
1960 if (dev->irq == 0) {
1961 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
1966 dev->irq = irq_canonicalize(dev->irq);
1968 /* Fill in the fields of the device structure with ethernet values. */
1971 dev->open = smc_open;
1972 dev->stop = smc_close;
1973 dev->hard_start_xmit = smc_hard_start_xmit;
1974 dev->tx_timeout = smc_timeout;
1975 dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1976 dev->get_stats = smc_query_statistics;
1977 dev->set_multicast_list = smc_set_multicast_list;
1978 dev->ethtool_ops = &smc_ethtool_ops;
1979 #ifdef CONFIG_NET_POLL_CONTROLLER
1980 dev->poll_controller = smc_poll_controller;
1983 tasklet_init(&lp->tx_task, smc_hardware_send_pkt, (unsigned long)dev);
1984 INIT_WORK(&lp->phy_configure, smc_phy_configure, dev);
1985 lp->mii.phy_id_mask = 0x1f;
1986 lp->mii.reg_num_mask = 0x1f;
1987 lp->mii.force_media = 0;
1988 lp->mii.full_duplex = 0;
1990 lp->mii.mdio_read = smc_phy_read;
1991 lp->mii.mdio_write = smc_phy_write;
1994 * Locate the phy, if any.
1996 if (lp->version >= (CHIP_91100 << 4))
1997 smc_phy_detect(dev);
1999 /* then shut everything down to save power */
2001 smc_phy_powerdown(dev);
2003 /* Set default parameters */
2004 lp->msg_enable = NETIF_MSG_LINK;
2005 lp->ctl_rfduplx = 0;
2006 lp->ctl_rspeed = 10;
2008 if (lp->version >= (CHIP_91100 << 4)) {
2009 lp->ctl_rfduplx = 1;
2010 lp->ctl_rspeed = 100;
2014 retval = request_irq(dev->irq, &smc_interrupt, SMC_IRQ_FLAGS, dev->name, dev);
2018 #ifdef SMC_USE_PXA_DMA
2020 int dma = pxa_request_dma(dev->name, DMA_PRIO_LOW,
2021 smc_pxa_dma_irq, NULL);
2027 retval = register_netdev(dev);
2029 /* now, print out the card info, in a short format.. */
2030 printk("%s: %s (rev %d) at %p IRQ %d",
2031 dev->name, version_string, revision_register & 0x0f,
2032 lp->base, dev->irq);
2034 if (dev->dma != (unsigned char)-1)
2035 printk(" DMA %d", dev->dma);
2037 printk("%s%s\n", nowait ? " [nowait]" : "",
2038 THROTTLE_TX_PKTS ? " [throttle_tx]" : "");
2040 if (!is_valid_ether_addr(dev->dev_addr)) {
2041 printk("%s: Invalid ethernet MAC address. Please "
2042 "set using ifconfig\n", dev->name);
2044 /* Print the Ethernet address */
2045 printk("%s: Ethernet addr: ", dev->name);
2046 for (i = 0; i < 5; i++)
2047 printk("%2.2x:", dev->dev_addr[i]);
2048 printk("%2.2x\n", dev->dev_addr[5]);
2051 if (lp->phy_type == 0) {
2052 PRINTK("%s: No PHY found\n", dev->name);
2053 } else if ((lp->phy_type & 0xfffffff0) == 0x0016f840) {
2054 PRINTK("%s: PHY LAN83C183 (LAN91C111 Internal)\n", dev->name);
2055 } else if ((lp->phy_type & 0xfffffff0) == 0x02821c50) {
2056 PRINTK("%s: PHY LAN83C180\n", dev->name);
2061 #ifdef SMC_USE_PXA_DMA
2062 if (retval && dev->dma != (unsigned char)-1)
2063 pxa_free_dma(dev->dma);
2068 static int smc_enable_device(struct platform_device *pdev)
2070 unsigned long flags;
2071 unsigned char ecor, ecsr;
2073 struct resource * res;
2075 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2080 * Map the attribute space. This is overkill, but clean.
2082 addr = ioremap(res->start, ATTRIB_SIZE);
2087 * Reset the device. We must disable IRQs around this
2088 * since a reset causes the IRQ line become active.
2090 local_irq_save(flags);
2091 ecor = readb(addr + (ECOR << SMC_IO_SHIFT)) & ~ECOR_RESET;
2092 writeb(ecor | ECOR_RESET, addr + (ECOR << SMC_IO_SHIFT));
2093 readb(addr + (ECOR << SMC_IO_SHIFT));
2096 * Wait 100us for the chip to reset.
2101 * The device will ignore all writes to the enable bit while
2102 * reset is asserted, even if the reset bit is cleared in the
2103 * same write. Must clear reset first, then enable the device.
2105 writeb(ecor, addr + (ECOR << SMC_IO_SHIFT));
2106 writeb(ecor | ECOR_ENABLE, addr + (ECOR << SMC_IO_SHIFT));
2109 * Set the appropriate byte/word mode.
2111 ecsr = readb(addr + (ECSR << SMC_IO_SHIFT)) & ~ECSR_IOIS8;
2112 #ifndef SMC_CAN_USE_16BIT
2115 writeb(ecsr, addr + (ECSR << SMC_IO_SHIFT));
2116 local_irq_restore(flags);
2121 * Wait for the chip to wake up. We could poll the control
2122 * register in the main register space, but that isn't mapped
2123 * yet. We know this is going to take 750us.
2130 static int smc_request_attrib(struct platform_device *pdev)
2132 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2137 if (!request_mem_region(res->start, ATTRIB_SIZE, CARDNAME))
2143 static void smc_release_attrib(struct platform_device *pdev)
2145 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2148 release_mem_region(res->start, ATTRIB_SIZE);
2151 #ifdef SMC_CAN_USE_DATACS
2152 static void smc_request_datacs(struct platform_device *pdev, struct net_device *ndev)
2154 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32");
2155 struct smc_local *lp = netdev_priv(ndev);
2160 if(!request_mem_region(res->start, SMC_DATA_EXTENT, CARDNAME)) {
2161 printk(KERN_INFO "%s: failed to request datacs memory region.\n", CARDNAME);
2165 lp->datacs = ioremap(res->start, SMC_DATA_EXTENT);
2168 static void smc_release_datacs(struct platform_device *pdev, struct net_device *ndev)
2170 struct smc_local *lp = netdev_priv(ndev);
2171 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32");
2174 iounmap(lp->datacs);
2179 release_mem_region(res->start, SMC_DATA_EXTENT);
2182 static void smc_request_datacs(struct platform_device *pdev, struct net_device *ndev) {}
2183 static void smc_release_datacs(struct platform_device *pdev, struct net_device *ndev) {}
2189 * dev->base_addr == 0, try to find all possible locations
2190 * dev->base_addr > 0x1ff, this is the address to check
2191 * dev->base_addr == <anything else>, return failure code
2194 * 0 --> there is a device
2195 * anything else, error
2197 static int smc_drv_probe(struct platform_device *pdev)
2199 struct net_device *ndev;
2200 struct resource *res;
2201 unsigned int __iomem *addr;
2204 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
2206 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2213 if (!request_mem_region(res->start, SMC_IO_EXTENT, CARDNAME)) {
2218 ndev = alloc_etherdev(sizeof(struct smc_local));
2220 printk("%s: could not allocate device.\n", CARDNAME);
2222 goto out_release_io;
2224 SET_MODULE_OWNER(ndev);
2225 SET_NETDEV_DEV(ndev, &pdev->dev);
2227 ndev->dma = (unsigned char)-1;
2228 ndev->irq = platform_get_irq(pdev, 0);
2230 ret = smc_request_attrib(pdev);
2232 goto out_free_netdev;
2233 #if defined(CONFIG_SA1100_ASSABET)
2234 NCR_0 |= NCR_ENET_OSC_EN;
2236 ret = smc_enable_device(pdev);
2238 goto out_release_attrib;
2240 addr = ioremap(res->start, SMC_IO_EXTENT);
2243 goto out_release_attrib;
2246 platform_set_drvdata(pdev, ndev);
2247 ret = smc_probe(ndev, addr);
2250 #ifdef SMC_USE_PXA_DMA
2252 struct smc_local *lp = netdev_priv(ndev);
2253 lp->physaddr = res->start;
2257 smc_request_datacs(pdev, ndev);
2262 platform_set_drvdata(pdev, NULL);
2265 smc_release_attrib(pdev);
2269 release_mem_region(res->start, SMC_IO_EXTENT);
2271 printk("%s: not found (%d).\n", CARDNAME, ret);
2276 static int smc_drv_remove(struct platform_device *pdev)
2278 struct net_device *ndev = platform_get_drvdata(pdev);
2279 struct smc_local *lp = netdev_priv(ndev);
2280 struct resource *res;
2282 platform_set_drvdata(pdev, NULL);
2284 unregister_netdev(ndev);
2286 free_irq(ndev->irq, ndev);
2288 #ifdef SMC_USE_PXA_DMA
2289 if (ndev->dma != (unsigned char)-1)
2290 pxa_free_dma(ndev->dma);
2294 smc_release_datacs(pdev,ndev);
2295 smc_release_attrib(pdev);
2297 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
2299 platform_get_resource(pdev, IORESOURCE_MEM, 0);
2300 release_mem_region(res->start, SMC_IO_EXTENT);
2307 static int smc_drv_suspend(struct platform_device *dev, pm_message_t state)
2309 struct net_device *ndev = platform_get_drvdata(dev);
2312 if (netif_running(ndev)) {
2313 netif_device_detach(ndev);
2315 smc_phy_powerdown(ndev);
2321 static int smc_drv_resume(struct platform_device *dev)
2323 struct net_device *ndev = platform_get_drvdata(dev);
2326 struct smc_local *lp = netdev_priv(ndev);
2327 smc_enable_device(dev);
2328 if (netif_running(ndev)) {
2331 if (lp->phy_type != 0)
2332 smc_phy_configure(ndev);
2333 netif_device_attach(ndev);
2339 static struct platform_driver smc_driver = {
2340 .probe = smc_drv_probe,
2341 .remove = smc_drv_remove,
2342 .suspend = smc_drv_suspend,
2343 .resume = smc_drv_resume,
2349 static int __init smc_init(void)
2355 "%s: You shouldn't use auto-probing with insmod!\n",
2360 return platform_driver_register(&smc_driver);
2363 static void __exit smc_cleanup(void)
2365 platform_driver_unregister(&smc_driver);
2368 module_init(smc_init);
2369 module_exit(smc_cleanup);