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>
97 * the LAN91C111 can be at any of the following port addresses. To change,
98 * for a slightly different card, you can add it to the array. Keep in
99 * mind that the array must end in zero.
101 static unsigned int smc_portlist[] __initdata = {
102 0x200, 0x220, 0x240, 0x260, 0x280, 0x2A0, 0x2C0, 0x2E0,
103 0x300, 0x320, 0x340, 0x360, 0x380, 0x3A0, 0x3C0, 0x3E0, 0
107 # define SMC_IOADDR -1
109 static unsigned long io = SMC_IOADDR;
110 module_param(io, ulong, 0400);
111 MODULE_PARM_DESC(io, "I/O base address");
116 static int irq = SMC_IRQ;
117 module_param(irq, int, 0400);
118 MODULE_PARM_DESC(irq, "IRQ number");
120 #endif /* CONFIG_ISA */
123 # define SMC_NOWAIT 0
125 static int nowait = SMC_NOWAIT;
126 module_param(nowait, int, 0400);
127 MODULE_PARM_DESC(nowait, "set to 1 for no wait state");
130 * Transmit timeout, default 5 seconds.
132 static int watchdog = 1000;
133 module_param(watchdog, int, 0400);
134 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
136 MODULE_LICENSE("GPL");
139 * The internal workings of the driver. If you are changing anything
140 * here with the SMC stuff, you should have the datasheet and know
141 * what you are doing.
143 #define CARDNAME "smc91x"
146 * Use power-down feature of the chip
151 * Wait time for memory to be free. This probably shouldn't be
152 * tuned that much, as waiting for this means nothing else happens
155 #define MEMORY_WAIT_TIME 16
158 * The maximum number of processing loops allowed for each call to the
161 #define MAX_IRQ_LOOPS 8
164 * This selects whether TX packets are sent one by one to the SMC91x internal
165 * memory and throttled until transmission completes. This may prevent
166 * RX overruns a litle by keeping much of the memory free for RX packets
167 * but to the expense of reduced TX throughput and increased IRQ overhead.
168 * Note this is not a cure for a too slow data bus or too high IRQ latency.
170 #define THROTTLE_TX_PKTS 0
173 * The MII clock high/low times. 2x this number gives the MII clock period
174 * in microseconds. (was 50, but this gives 6.4ms for each MII transaction!)
178 /* store this information for the driver.. */
181 * If I have to wait until memory is available to send a
182 * packet, I will store the skbuff here, until I get the
183 * desired memory. Then, I'll send it out and free it.
185 struct sk_buff *pending_tx_skb;
186 struct tasklet_struct tx_task;
189 * these are things that the kernel wants me to keep, so users
190 * can find out semi-useless statistics of how well the card is
193 struct net_device_stats stats;
195 /* version/revision of the SMC91x chip */
198 /* Contains the current active transmission mode */
201 /* Contains the current active receive mode */
204 /* Contains the current active receive/phy mode */
211 struct mii_if_info mii;
214 struct work_struct phy_configure;
219 #ifdef SMC_CAN_USE_DATACS
223 #ifdef SMC_USE_PXA_DMA
224 /* DMA needs the physical address of the chip */
231 #define DBG(n, args...) \
233 if (SMC_DEBUG >= (n)) \
237 #define PRINTK(args...) printk(args)
239 #define DBG(n, args...) do { } while(0)
240 #define PRINTK(args...) printk(KERN_DEBUG args)
244 static void PRINT_PKT(u_char *buf, int length)
251 remainder = length % 16;
253 for (i = 0; i < lines ; i ++) {
255 for (cur = 0; cur < 8; cur++) {
259 printk("%02x%02x ", a, b);
263 for (i = 0; i < remainder/2 ; i++) {
267 printk("%02x%02x ", a, b);
272 #define PRINT_PKT(x...) do { } while(0)
276 /* this enables an interrupt in the interrupt mask register */
277 #define SMC_ENABLE_INT(x) do { \
278 unsigned char mask; \
279 spin_lock_irq(&lp->lock); \
280 mask = SMC_GET_INT_MASK(); \
282 SMC_SET_INT_MASK(mask); \
283 spin_unlock_irq(&lp->lock); \
286 /* this disables an interrupt from the interrupt mask register */
287 #define SMC_DISABLE_INT(x) do { \
288 unsigned char mask; \
289 spin_lock_irq(&lp->lock); \
290 mask = SMC_GET_INT_MASK(); \
292 SMC_SET_INT_MASK(mask); \
293 spin_unlock_irq(&lp->lock); \
297 * Wait while MMU is busy. This is usually in the order of a few nanosecs
298 * if at all, but let's avoid deadlocking the system if the hardware
299 * decides to go south.
301 #define SMC_WAIT_MMU_BUSY() do { \
302 if (unlikely(SMC_GET_MMU_CMD() & MC_BUSY)) { \
303 unsigned long timeout = jiffies + 2; \
304 while (SMC_GET_MMU_CMD() & MC_BUSY) { \
305 if (time_after(jiffies, timeout)) { \
306 printk("%s: timeout %s line %d\n", \
307 dev->name, __FILE__, __LINE__); \
317 * this does a soft reset on the device
319 static void smc_reset(struct net_device *dev)
321 struct smc_local *lp = netdev_priv(dev);
322 void __iomem *ioaddr = lp->base;
323 unsigned int ctl, cfg;
324 struct sk_buff *pending_skb;
326 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
328 /* Disable all interrupts, block TX tasklet */
329 spin_lock(&lp->lock);
332 pending_skb = lp->pending_tx_skb;
333 lp->pending_tx_skb = NULL;
334 spin_unlock(&lp->lock);
336 /* free any pending tx skb */
338 dev_kfree_skb(pending_skb);
339 lp->stats.tx_errors++;
340 lp->stats.tx_aborted_errors++;
344 * This resets the registers mostly to defaults, but doesn't
345 * affect EEPROM. That seems unnecessary
348 SMC_SET_RCR(RCR_SOFTRST);
351 * Setup the Configuration Register
352 * This is necessary because the CONFIG_REG is not affected
357 cfg = CONFIG_DEFAULT;
360 * Setup for fast accesses if requested. If the card/system
361 * can't handle it then there will be no recovery except for
362 * a hard reset or power cycle
365 cfg |= CONFIG_NO_WAIT;
368 * Release from possible power-down state
369 * Configuration register is not affected by Soft Reset
371 cfg |= CONFIG_EPH_POWER_EN;
375 /* this should pause enough for the chip to be happy */
377 * elaborate? What does the chip _need_? --jgarzik
379 * This seems to be undocumented, but something the original
380 * driver(s) have always done. Suspect undocumented timing
381 * info/determined empirically. --rmk
385 /* Disable transmit and receive functionality */
387 SMC_SET_RCR(RCR_CLEAR);
388 SMC_SET_TCR(TCR_CLEAR);
391 ctl = SMC_GET_CTL() | CTL_LE_ENABLE;
394 * Set the control register to automatically release successfully
395 * transmitted packets, to make the best use out of our limited
398 if(!THROTTLE_TX_PKTS)
399 ctl |= CTL_AUTO_RELEASE;
401 ctl &= ~CTL_AUTO_RELEASE;
406 SMC_SET_MMU_CMD(MC_RESET);
411 * Enable Interrupts, Receive, and Transmit
413 static void smc_enable(struct net_device *dev)
415 struct smc_local *lp = netdev_priv(dev);
416 void __iomem *ioaddr = lp->base;
419 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
421 /* see the header file for options in TCR/RCR DEFAULT */
423 SMC_SET_TCR(lp->tcr_cur_mode);
424 SMC_SET_RCR(lp->rcr_cur_mode);
427 SMC_SET_MAC_ADDR(dev->dev_addr);
429 /* now, enable interrupts */
430 mask = IM_EPH_INT|IM_RX_OVRN_INT|IM_RCV_INT;
431 if (lp->version >= (CHIP_91100 << 4))
434 SMC_SET_INT_MASK(mask);
437 * From this point the register bank must _NOT_ be switched away
438 * to something else than bank 2 without proper locking against
439 * races with any tasklet or interrupt handlers until smc_shutdown()
440 * or smc_reset() is called.
445 * this puts the device in an inactive state
447 static void smc_shutdown(struct net_device *dev)
449 struct smc_local *lp = netdev_priv(dev);
450 void __iomem *ioaddr = lp->base;
451 struct sk_buff *pending_skb;
453 DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__);
455 /* no more interrupts for me */
456 spin_lock(&lp->lock);
459 pending_skb = lp->pending_tx_skb;
460 lp->pending_tx_skb = NULL;
461 spin_unlock(&lp->lock);
463 dev_kfree_skb(pending_skb);
465 /* and tell the card to stay away from that nasty outside world */
467 SMC_SET_RCR(RCR_CLEAR);
468 SMC_SET_TCR(TCR_CLEAR);
471 /* finally, shut the chip down */
473 SMC_SET_CONFIG(SMC_GET_CONFIG() & ~CONFIG_EPH_POWER_EN);
478 * This is the procedure to handle the receipt of a packet.
480 static inline void smc_rcv(struct net_device *dev)
482 struct smc_local *lp = netdev_priv(dev);
483 void __iomem *ioaddr = lp->base;
484 unsigned int packet_number, status, packet_len;
486 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
488 packet_number = SMC_GET_RXFIFO();
489 if (unlikely(packet_number & RXFIFO_REMPTY)) {
490 PRINTK("%s: smc_rcv with nothing on FIFO.\n", dev->name);
494 /* read from start of packet */
495 SMC_SET_PTR(PTR_READ | PTR_RCV | PTR_AUTOINC);
497 /* First two words are status and packet length */
498 SMC_GET_PKT_HDR(status, packet_len);
499 packet_len &= 0x07ff; /* mask off top bits */
500 DBG(2, "%s: RX PNR 0x%x STATUS 0x%04x LENGTH 0x%04x (%d)\n",
501 dev->name, packet_number, status,
502 packet_len, packet_len);
504 if (unlikely(packet_len == 0 && !(status & RS_ERRORS))) {
505 printk(KERN_ERR "%s: bad memory timings: rxlen %u status %x\n",
506 dev->name, packet_len, status);
507 status |= RS_TOOSHORT;
510 if (unlikely(packet_len < 6 || status & RS_ERRORS)) {
511 if (status & RS_TOOLONG && packet_len <= (1514 + 4 + 6)) {
512 /* accept VLAN packets */
513 status &= ~RS_TOOLONG;
516 if (packet_len < 6) {
517 /* bloody hardware */
518 printk(KERN_ERR "%s: fubar (rxlen %u status %x\n",
519 dev->name, packet_len, status);
520 status |= RS_TOOSHORT;
523 SMC_SET_MMU_CMD(MC_RELEASE);
524 lp->stats.rx_errors++;
525 if (status & RS_ALGNERR)
526 lp->stats.rx_frame_errors++;
527 if (status & (RS_TOOSHORT | RS_TOOLONG))
528 lp->stats.rx_length_errors++;
529 if (status & RS_BADCRC)
530 lp->stats.rx_crc_errors++;
534 unsigned int data_len;
536 /* set multicast stats */
537 if (status & RS_MULTICAST)
538 lp->stats.multicast++;
541 * Actual payload is packet_len - 6 (or 5 if odd byte).
542 * We want skb_reserve(2) and the final ctrl word
543 * (2 bytes, possibly containing the payload odd byte).
544 * Furthermore, we add 2 bytes to allow rounding up to
545 * multiple of 4 bytes on 32 bit buses.
546 * Hence packet_len - 6 + 2 + 2 + 2.
548 skb = dev_alloc_skb(packet_len);
549 if (unlikely(skb == NULL)) {
550 printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
553 SMC_SET_MMU_CMD(MC_RELEASE);
554 lp->stats.rx_dropped++;
558 /* Align IP header to 32 bits */
561 /* BUG: the LAN91C111 rev A never sets this bit. Force it. */
562 if (lp->version == 0x90)
563 status |= RS_ODDFRAME;
566 * If odd length: packet_len - 5,
567 * otherwise packet_len - 6.
568 * With the trailing ctrl byte it's packet_len - 4.
570 data_len = packet_len - ((status & RS_ODDFRAME) ? 5 : 6);
571 data = skb_put(skb, data_len);
572 SMC_PULL_DATA(data, packet_len - 4);
575 SMC_SET_MMU_CMD(MC_RELEASE);
577 PRINT_PKT(data, packet_len - 4);
579 dev->last_rx = jiffies;
581 skb->protocol = eth_type_trans(skb, dev);
583 lp->stats.rx_packets++;
584 lp->stats.rx_bytes += data_len;
590 * On SMP we have the following problem:
592 * A = smc_hardware_send_pkt()
593 * B = smc_hard_start_xmit()
594 * C = smc_interrupt()
596 * A and B can never be executed simultaneously. However, at least on UP,
597 * it is possible (and even desirable) for C to interrupt execution of
598 * A or B in order to have better RX reliability and avoid overruns.
599 * C, just like A and B, must have exclusive access to the chip and
600 * each of them must lock against any other concurrent access.
601 * Unfortunately this is not possible to have C suspend execution of A or
602 * B taking place on another CPU. On UP this is no an issue since A and B
603 * are run from softirq context and C from hard IRQ context, and there is
604 * no other CPU where concurrent access can happen.
605 * If ever there is a way to force at least B and C to always be executed
606 * on the same CPU then we could use read/write locks to protect against
607 * any other concurrent access and C would always interrupt B. But life
608 * isn't that easy in a SMP world...
610 #define smc_special_trylock(lock) \
613 local_irq_disable(); \
614 __ret = spin_trylock(lock); \
616 local_irq_enable(); \
619 #define smc_special_lock(lock) spin_lock_irq(lock)
620 #define smc_special_unlock(lock) spin_unlock_irq(lock)
622 #define smc_special_trylock(lock) (1)
623 #define smc_special_lock(lock) do { } while (0)
624 #define smc_special_unlock(lock) do { } while (0)
628 * This is called to actually send a packet to the chip.
630 static void smc_hardware_send_pkt(unsigned long data)
632 struct net_device *dev = (struct net_device *)data;
633 struct smc_local *lp = netdev_priv(dev);
634 void __iomem *ioaddr = lp->base;
636 unsigned int packet_no, len;
639 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
641 if (!smc_special_trylock(&lp->lock)) {
642 netif_stop_queue(dev);
643 tasklet_schedule(&lp->tx_task);
647 skb = lp->pending_tx_skb;
648 if (unlikely(!skb)) {
649 smc_special_unlock(&lp->lock);
652 lp->pending_tx_skb = NULL;
654 packet_no = SMC_GET_AR();
655 if (unlikely(packet_no & AR_FAILED)) {
656 printk("%s: Memory allocation failed.\n", dev->name);
657 lp->stats.tx_errors++;
658 lp->stats.tx_fifo_errors++;
659 smc_special_unlock(&lp->lock);
663 /* point to the beginning of the packet */
664 SMC_SET_PN(packet_no);
665 SMC_SET_PTR(PTR_AUTOINC);
669 DBG(2, "%s: TX PNR 0x%x LENGTH 0x%04x (%d) BUF 0x%p\n",
670 dev->name, packet_no, len, len, buf);
674 * Send the packet length (+6 for status words, length, and ctl.
675 * The card will pad to 64 bytes with zeroes if packet is too small.
677 SMC_PUT_PKT_HDR(0, len + 6);
679 /* send the actual data */
680 SMC_PUSH_DATA(buf, len & ~1);
682 /* Send final ctl word with the last byte if there is one */
683 SMC_outw(((len & 1) ? (0x2000 | buf[len-1]) : 0), ioaddr, DATA_REG);
686 * If THROTTLE_TX_PKTS is set, we stop the queue here. This will
687 * have the effect of having at most one packet queued for TX
688 * in the chip's memory at all time.
690 * If THROTTLE_TX_PKTS is not set then the queue is stopped only
691 * when memory allocation (MC_ALLOC) does not succeed right away.
693 if (THROTTLE_TX_PKTS)
694 netif_stop_queue(dev);
696 /* queue the packet for TX */
697 SMC_SET_MMU_CMD(MC_ENQUEUE);
698 smc_special_unlock(&lp->lock);
700 dev->trans_start = jiffies;
701 lp->stats.tx_packets++;
702 lp->stats.tx_bytes += len;
704 SMC_ENABLE_INT(IM_TX_INT | IM_TX_EMPTY_INT);
706 done: if (!THROTTLE_TX_PKTS)
707 netif_wake_queue(dev);
713 * Since I am not sure if I will have enough room in the chip's ram
714 * to store the packet, I call this routine which either sends it
715 * now, or set the card to generates an interrupt when ready
718 static int smc_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
720 struct smc_local *lp = netdev_priv(dev);
721 void __iomem *ioaddr = lp->base;
722 unsigned int numPages, poll_count, status;
724 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
726 BUG_ON(lp->pending_tx_skb != NULL);
729 * The MMU wants the number of pages to be the number of 256 bytes
730 * 'pages', minus 1 (since a packet can't ever have 0 pages :))
732 * The 91C111 ignores the size bits, but earlier models don't.
734 * Pkt size for allocating is data length +6 (for additional status
735 * words, length and ctl)
737 * If odd size then last byte is included in ctl word.
739 numPages = ((skb->len & ~1) + (6 - 1)) >> 8;
740 if (unlikely(numPages > 7)) {
741 printk("%s: Far too big packet error.\n", dev->name);
742 lp->stats.tx_errors++;
743 lp->stats.tx_dropped++;
748 smc_special_lock(&lp->lock);
750 /* now, try to allocate the memory */
751 SMC_SET_MMU_CMD(MC_ALLOC | numPages);
754 * Poll the chip for a short amount of time in case the
755 * allocation succeeds quickly.
757 poll_count = MEMORY_WAIT_TIME;
759 status = SMC_GET_INT();
760 if (status & IM_ALLOC_INT) {
761 SMC_ACK_INT(IM_ALLOC_INT);
764 } while (--poll_count);
766 smc_special_unlock(&lp->lock);
768 lp->pending_tx_skb = skb;
770 /* oh well, wait until the chip finds memory later */
771 netif_stop_queue(dev);
772 DBG(2, "%s: TX memory allocation deferred.\n", dev->name);
773 SMC_ENABLE_INT(IM_ALLOC_INT);
776 * Allocation succeeded: push packet to the chip's own memory
779 smc_hardware_send_pkt((unsigned long)dev);
786 * This handles a TX interrupt, which is only called when:
787 * - a TX error occurred, or
788 * - CTL_AUTO_RELEASE is not set and TX of a packet completed.
790 static void smc_tx(struct net_device *dev)
792 struct smc_local *lp = netdev_priv(dev);
793 void __iomem *ioaddr = lp->base;
794 unsigned int saved_packet, packet_no, tx_status, pkt_len;
796 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
798 /* If the TX FIFO is empty then nothing to do */
799 packet_no = SMC_GET_TXFIFO();
800 if (unlikely(packet_no & TXFIFO_TEMPTY)) {
801 PRINTK("%s: smc_tx with nothing on FIFO.\n", dev->name);
805 /* select packet to read from */
806 saved_packet = SMC_GET_PN();
807 SMC_SET_PN(packet_no);
809 /* read the first word (status word) from this packet */
810 SMC_SET_PTR(PTR_AUTOINC | PTR_READ);
811 SMC_GET_PKT_HDR(tx_status, pkt_len);
812 DBG(2, "%s: TX STATUS 0x%04x PNR 0x%02x\n",
813 dev->name, tx_status, packet_no);
815 if (!(tx_status & ES_TX_SUC))
816 lp->stats.tx_errors++;
818 if (tx_status & ES_LOSTCARR)
819 lp->stats.tx_carrier_errors++;
821 if (tx_status & (ES_LATCOL | ES_16COL)) {
822 PRINTK("%s: %s occurred on last xmit\n", dev->name,
823 (tx_status & ES_LATCOL) ?
824 "late collision" : "too many collisions");
825 lp->stats.tx_window_errors++;
826 if (!(lp->stats.tx_window_errors & 63) && net_ratelimit()) {
827 printk(KERN_INFO "%s: unexpectedly large number of "
828 "bad collisions. Please check duplex "
829 "setting.\n", dev->name);
833 /* kill the packet */
835 SMC_SET_MMU_CMD(MC_FREEPKT);
837 /* Don't restore Packet Number Reg until busy bit is cleared */
839 SMC_SET_PN(saved_packet);
841 /* re-enable transmit */
843 SMC_SET_TCR(lp->tcr_cur_mode);
848 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
850 static void smc_mii_out(struct net_device *dev, unsigned int val, int bits)
852 struct smc_local *lp = netdev_priv(dev);
853 void __iomem *ioaddr = lp->base;
854 unsigned int mii_reg, mask;
856 mii_reg = SMC_GET_MII() & ~(MII_MCLK | MII_MDOE | MII_MDO);
859 for (mask = 1 << (bits - 1); mask; mask >>= 1) {
865 SMC_SET_MII(mii_reg);
867 SMC_SET_MII(mii_reg | MII_MCLK);
872 static unsigned int smc_mii_in(struct net_device *dev, int bits)
874 struct smc_local *lp = netdev_priv(dev);
875 void __iomem *ioaddr = lp->base;
876 unsigned int mii_reg, mask, val;
878 mii_reg = SMC_GET_MII() & ~(MII_MCLK | MII_MDOE | MII_MDO);
879 SMC_SET_MII(mii_reg);
881 for (mask = 1 << (bits - 1), val = 0; mask; mask >>= 1) {
882 if (SMC_GET_MII() & MII_MDI)
885 SMC_SET_MII(mii_reg);
887 SMC_SET_MII(mii_reg | MII_MCLK);
895 * Reads a register from the MII Management serial interface
897 static int smc_phy_read(struct net_device *dev, int phyaddr, int phyreg)
899 struct smc_local *lp = netdev_priv(dev);
900 void __iomem *ioaddr = lp->base;
901 unsigned int phydata;
906 smc_mii_out(dev, 0xffffffff, 32);
908 /* Start code (01) + read (10) + phyaddr + phyreg */
909 smc_mii_out(dev, 6 << 10 | phyaddr << 5 | phyreg, 14);
911 /* Turnaround (2bits) + phydata */
912 phydata = smc_mii_in(dev, 18);
914 /* Return to idle state */
915 SMC_SET_MII(SMC_GET_MII() & ~(MII_MCLK|MII_MDOE|MII_MDO));
917 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
918 __FUNCTION__, phyaddr, phyreg, phydata);
925 * Writes a register to the MII Management serial interface
927 static void smc_phy_write(struct net_device *dev, int phyaddr, int phyreg,
930 struct smc_local *lp = netdev_priv(dev);
931 void __iomem *ioaddr = lp->base;
936 smc_mii_out(dev, 0xffffffff, 32);
938 /* Start code (01) + write (01) + phyaddr + phyreg + turnaround + phydata */
939 smc_mii_out(dev, 5 << 28 | phyaddr << 23 | phyreg << 18 | 2 << 16 | phydata, 32);
941 /* Return to idle state */
942 SMC_SET_MII(SMC_GET_MII() & ~(MII_MCLK|MII_MDOE|MII_MDO));
944 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
945 __FUNCTION__, phyaddr, phyreg, phydata);
951 * Finds and reports the PHY address
953 static void smc_phy_detect(struct net_device *dev)
955 struct smc_local *lp = netdev_priv(dev);
958 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
963 * Scan all 32 PHY addresses if necessary, starting at
964 * PHY#1 to PHY#31, and then PHY#0 last.
966 for (phyaddr = 1; phyaddr < 33; ++phyaddr) {
967 unsigned int id1, id2;
969 /* Read the PHY identifiers */
970 id1 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID1);
971 id2 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID2);
973 DBG(3, "%s: phy_id1=0x%x, phy_id2=0x%x\n",
974 dev->name, id1, id2);
976 /* Make sure it is a valid identifier */
977 if (id1 != 0x0000 && id1 != 0xffff && id1 != 0x8000 &&
978 id2 != 0x0000 && id2 != 0xffff && id2 != 0x8000) {
979 /* Save the PHY's address */
980 lp->mii.phy_id = phyaddr & 31;
981 lp->phy_type = id1 << 16 | id2;
988 * Sets the PHY to a configuration as determined by the user
990 static int smc_phy_fixed(struct net_device *dev)
992 struct smc_local *lp = netdev_priv(dev);
993 void __iomem *ioaddr = lp->base;
994 int phyaddr = lp->mii.phy_id;
997 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
999 /* Enter Link Disable state */
1000 cfg1 = smc_phy_read(dev, phyaddr, PHY_CFG1_REG);
1001 cfg1 |= PHY_CFG1_LNKDIS;
1002 smc_phy_write(dev, phyaddr, PHY_CFG1_REG, cfg1);
1005 * Set our fixed capabilities
1006 * Disable auto-negotiation
1010 if (lp->ctl_rfduplx)
1011 bmcr |= BMCR_FULLDPLX;
1013 if (lp->ctl_rspeed == 100)
1014 bmcr |= BMCR_SPEED100;
1016 /* Write our capabilities to the phy control register */
1017 smc_phy_write(dev, phyaddr, MII_BMCR, bmcr);
1019 /* Re-Configure the Receive/Phy Control register */
1021 SMC_SET_RPC(lp->rpc_cur_mode);
1028 * smc_phy_reset - reset the phy
1032 * Issue a software reset for the specified PHY and
1033 * wait up to 100ms for the reset to complete. We should
1034 * not access the PHY for 50ms after issuing the reset.
1036 * The time to wait appears to be dependent on the PHY.
1038 * Must be called with lp->lock locked.
1040 static int smc_phy_reset(struct net_device *dev, int phy)
1042 struct smc_local *lp = netdev_priv(dev);
1046 smc_phy_write(dev, phy, MII_BMCR, BMCR_RESET);
1048 for (timeout = 2; timeout; timeout--) {
1049 spin_unlock_irq(&lp->lock);
1051 spin_lock_irq(&lp->lock);
1053 bmcr = smc_phy_read(dev, phy, MII_BMCR);
1054 if (!(bmcr & BMCR_RESET))
1058 return bmcr & BMCR_RESET;
1062 * smc_phy_powerdown - powerdown phy
1065 * Power down the specified PHY
1067 static void smc_phy_powerdown(struct net_device *dev)
1069 struct smc_local *lp = netdev_priv(dev);
1071 int phy = lp->mii.phy_id;
1073 if (lp->phy_type == 0)
1076 /* We need to ensure that no calls to smc_phy_configure are
1079 flush_scheduled_work() cannot be called because we are
1080 running with the netlink semaphore held (from
1081 devinet_ioctl()) and the pending work queue contains
1082 linkwatch_event() (scheduled by netif_carrier_off()
1083 above). linkwatch_event() also wants the netlink semaphore.
1085 while(lp->work_pending)
1088 bmcr = smc_phy_read(dev, phy, MII_BMCR);
1089 smc_phy_write(dev, phy, MII_BMCR, bmcr | BMCR_PDOWN);
1093 * smc_phy_check_media - check the media status and adjust TCR
1095 * @init: set true for initialisation
1097 * Select duplex mode depending on negotiation state. This
1098 * also updates our carrier state.
1100 static void smc_phy_check_media(struct net_device *dev, int init)
1102 struct smc_local *lp = netdev_priv(dev);
1103 void __iomem *ioaddr = lp->base;
1105 if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
1106 /* duplex state has changed */
1107 if (lp->mii.full_duplex) {
1108 lp->tcr_cur_mode |= TCR_SWFDUP;
1110 lp->tcr_cur_mode &= ~TCR_SWFDUP;
1114 SMC_SET_TCR(lp->tcr_cur_mode);
1119 * Configures the specified PHY through the MII management interface
1120 * using Autonegotiation.
1121 * Calls smc_phy_fixed() if the user has requested a certain config.
1122 * If RPC ANEG bit is set, the media selection is dependent purely on
1123 * the selection by the MII (either in the MII BMCR reg or the result
1124 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
1125 * is controlled by the RPC SPEED and RPC DPLX bits.
1127 static void smc_phy_configure(void *data)
1129 struct net_device *dev = data;
1130 struct smc_local *lp = netdev_priv(dev);
1131 void __iomem *ioaddr = lp->base;
1132 int phyaddr = lp->mii.phy_id;
1133 int my_phy_caps; /* My PHY capabilities */
1134 int my_ad_caps; /* My Advertised capabilities */
1137 DBG(3, "%s:smc_program_phy()\n", dev->name);
1139 spin_lock_irq(&lp->lock);
1142 * We should not be called if phy_type is zero.
1144 if (lp->phy_type == 0)
1145 goto smc_phy_configure_exit;
1147 if (smc_phy_reset(dev, phyaddr)) {
1148 printk("%s: PHY reset timed out\n", dev->name);
1149 goto smc_phy_configure_exit;
1153 * Enable PHY Interrupts (for register 18)
1154 * Interrupts listed here are disabled
1156 smc_phy_write(dev, phyaddr, PHY_MASK_REG,
1157 PHY_INT_LOSSSYNC | PHY_INT_CWRD | PHY_INT_SSD |
1158 PHY_INT_ESD | PHY_INT_RPOL | PHY_INT_JAB |
1159 PHY_INT_SPDDET | PHY_INT_DPLXDET);
1161 /* Configure the Receive/Phy Control register */
1163 SMC_SET_RPC(lp->rpc_cur_mode);
1165 /* If the user requested no auto neg, then go set his request */
1166 if (lp->mii.force_media) {
1168 goto smc_phy_configure_exit;
1171 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
1172 my_phy_caps = smc_phy_read(dev, phyaddr, MII_BMSR);
1174 if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
1175 printk(KERN_INFO "Auto negotiation NOT supported\n");
1177 goto smc_phy_configure_exit;
1180 my_ad_caps = ADVERTISE_CSMA; /* I am CSMA capable */
1182 if (my_phy_caps & BMSR_100BASE4)
1183 my_ad_caps |= ADVERTISE_100BASE4;
1184 if (my_phy_caps & BMSR_100FULL)
1185 my_ad_caps |= ADVERTISE_100FULL;
1186 if (my_phy_caps & BMSR_100HALF)
1187 my_ad_caps |= ADVERTISE_100HALF;
1188 if (my_phy_caps & BMSR_10FULL)
1189 my_ad_caps |= ADVERTISE_10FULL;
1190 if (my_phy_caps & BMSR_10HALF)
1191 my_ad_caps |= ADVERTISE_10HALF;
1193 /* Disable capabilities not selected by our user */
1194 if (lp->ctl_rspeed != 100)
1195 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
1197 if (!lp->ctl_rfduplx)
1198 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
1200 /* Update our Auto-Neg Advertisement Register */
1201 smc_phy_write(dev, phyaddr, MII_ADVERTISE, my_ad_caps);
1202 lp->mii.advertising = my_ad_caps;
1205 * Read the register back. Without this, it appears that when
1206 * auto-negotiation is restarted, sometimes it isn't ready and
1207 * the link does not come up.
1209 status = smc_phy_read(dev, phyaddr, MII_ADVERTISE);
1211 DBG(2, "%s: phy caps=%x\n", dev->name, my_phy_caps);
1212 DBG(2, "%s: phy advertised caps=%x\n", dev->name, my_ad_caps);
1214 /* Restart auto-negotiation process in order to advertise my caps */
1215 smc_phy_write(dev, phyaddr, MII_BMCR, BMCR_ANENABLE | BMCR_ANRESTART);
1217 smc_phy_check_media(dev, 1);
1219 smc_phy_configure_exit:
1221 spin_unlock_irq(&lp->lock);
1222 lp->work_pending = 0;
1228 * Purpose: Handle interrupts relating to PHY register 18. This is
1229 * called from the "hard" interrupt handler under our private spinlock.
1231 static void smc_phy_interrupt(struct net_device *dev)
1233 struct smc_local *lp = netdev_priv(dev);
1234 int phyaddr = lp->mii.phy_id;
1237 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1239 if (lp->phy_type == 0)
1243 smc_phy_check_media(dev, 0);
1245 /* Read PHY Register 18, Status Output */
1246 phy18 = smc_phy_read(dev, phyaddr, PHY_INT_REG);
1247 if ((phy18 & PHY_INT_INT) == 0)
1252 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1254 static void smc_10bt_check_media(struct net_device *dev, int init)
1256 struct smc_local *lp = netdev_priv(dev);
1257 void __iomem *ioaddr = lp->base;
1258 unsigned int old_carrier, new_carrier;
1260 old_carrier = netif_carrier_ok(dev) ? 1 : 0;
1263 new_carrier = (SMC_GET_EPH_STATUS() & ES_LINK_OK) ? 1 : 0;
1266 if (init || (old_carrier != new_carrier)) {
1268 netif_carrier_off(dev);
1270 netif_carrier_on(dev);
1272 if (netif_msg_link(lp))
1273 printk(KERN_INFO "%s: link %s\n", dev->name,
1274 new_carrier ? "up" : "down");
1278 static void smc_eph_interrupt(struct net_device *dev)
1280 struct smc_local *lp = netdev_priv(dev);
1281 void __iomem *ioaddr = lp->base;
1284 smc_10bt_check_media(dev, 0);
1287 ctl = SMC_GET_CTL();
1288 SMC_SET_CTL(ctl & ~CTL_LE_ENABLE);
1294 * This is the main routine of the driver, to handle the device when
1295 * it needs some attention.
1297 static irqreturn_t smc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1299 struct net_device *dev = dev_id;
1300 struct smc_local *lp = netdev_priv(dev);
1301 void __iomem *ioaddr = lp->base;
1302 int status, mask, timeout, card_stats;
1305 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
1307 spin_lock(&lp->lock);
1309 /* A preamble may be used when there is a potential race
1310 * between the interruptible transmit functions and this
1312 SMC_INTERRUPT_PREAMBLE;
1314 saved_pointer = SMC_GET_PTR();
1315 mask = SMC_GET_INT_MASK();
1316 SMC_SET_INT_MASK(0);
1318 /* set a timeout value, so I don't stay here forever */
1319 timeout = MAX_IRQ_LOOPS;
1322 status = SMC_GET_INT();
1324 DBG(2, "%s: INT 0x%02x MASK 0x%02x MEM 0x%04x FIFO 0x%04x\n",
1325 dev->name, status, mask,
1326 ({ int meminfo; SMC_SELECT_BANK(0);
1327 meminfo = SMC_GET_MIR();
1328 SMC_SELECT_BANK(2); meminfo; }),
1335 if (status & IM_TX_INT) {
1336 /* do this before RX as it will free memory quickly */
1337 DBG(3, "%s: TX int\n", dev->name);
1339 SMC_ACK_INT(IM_TX_INT);
1340 if (THROTTLE_TX_PKTS)
1341 netif_wake_queue(dev);
1342 } else if (status & IM_RCV_INT) {
1343 DBG(3, "%s: RX irq\n", dev->name);
1345 } else if (status & IM_ALLOC_INT) {
1346 DBG(3, "%s: Allocation irq\n", dev->name);
1347 tasklet_hi_schedule(&lp->tx_task);
1348 mask &= ~IM_ALLOC_INT;
1349 } else if (status & IM_TX_EMPTY_INT) {
1350 DBG(3, "%s: TX empty\n", dev->name);
1351 mask &= ~IM_TX_EMPTY_INT;
1355 card_stats = SMC_GET_COUNTER();
1358 /* single collisions */
1359 lp->stats.collisions += card_stats & 0xF;
1362 /* multiple collisions */
1363 lp->stats.collisions += card_stats & 0xF;
1364 } else if (status & IM_RX_OVRN_INT) {
1365 DBG(1, "%s: RX overrun (EPH_ST 0x%04x)\n", dev->name,
1366 ({ int eph_st; SMC_SELECT_BANK(0);
1367 eph_st = SMC_GET_EPH_STATUS();
1368 SMC_SELECT_BANK(2); eph_st; }) );
1369 SMC_ACK_INT(IM_RX_OVRN_INT);
1370 lp->stats.rx_errors++;
1371 lp->stats.rx_fifo_errors++;
1372 } else if (status & IM_EPH_INT) {
1373 smc_eph_interrupt(dev);
1374 } else if (status & IM_MDINT) {
1375 SMC_ACK_INT(IM_MDINT);
1376 smc_phy_interrupt(dev);
1377 } else if (status & IM_ERCV_INT) {
1378 SMC_ACK_INT(IM_ERCV_INT);
1379 PRINTK("%s: UNSUPPORTED: ERCV INTERRUPT \n", dev->name);
1381 } while (--timeout);
1383 /* restore register states */
1384 SMC_SET_PTR(saved_pointer);
1385 SMC_SET_INT_MASK(mask);
1386 spin_unlock(&lp->lock);
1388 if (timeout == MAX_IRQ_LOOPS)
1389 PRINTK("%s: spurious interrupt (mask = 0x%02x)\n",
1391 DBG(3, "%s: Interrupt done (%d loops)\n",
1392 dev->name, MAX_IRQ_LOOPS - timeout);
1395 * We return IRQ_HANDLED unconditionally here even if there was
1396 * nothing to do. There is a possibility that a packet might
1397 * get enqueued into the chip right after TX_EMPTY_INT is raised
1398 * but just before the CPU acknowledges the IRQ.
1399 * Better take an unneeded IRQ in some occasions than complexifying
1400 * the code for all cases.
1405 #ifdef CONFIG_NET_POLL_CONTROLLER
1407 * Polling receive - used by netconsole and other diagnostic tools
1408 * to allow network i/o with interrupts disabled.
1410 static void smc_poll_controller(struct net_device *dev)
1412 disable_irq(dev->irq);
1413 smc_interrupt(dev->irq, dev, NULL);
1414 enable_irq(dev->irq);
1418 /* Our watchdog timed out. Called by the networking layer */
1419 static void smc_timeout(struct net_device *dev)
1421 struct smc_local *lp = netdev_priv(dev);
1422 void __iomem *ioaddr = lp->base;
1423 int status, mask, eph_st, meminfo, fifo;
1425 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1427 spin_lock_irq(&lp->lock);
1428 status = SMC_GET_INT();
1429 mask = SMC_GET_INT_MASK();
1430 fifo = SMC_GET_FIFO();
1432 eph_st = SMC_GET_EPH_STATUS();
1433 meminfo = SMC_GET_MIR();
1435 spin_unlock_irq(&lp->lock);
1436 PRINTK( "%s: TX timeout (INT 0x%02x INTMASK 0x%02x "
1437 "MEM 0x%04x FIFO 0x%04x EPH_ST 0x%04x)\n",
1438 dev->name, status, mask, meminfo, fifo, eph_st );
1444 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1445 * smc_phy_configure() calls msleep() which calls schedule_timeout()
1446 * which calls schedule(). Hence we use a work queue.
1448 if (lp->phy_type != 0) {
1449 if (schedule_work(&lp->phy_configure)) {
1450 lp->work_pending = 1;
1454 /* We can accept TX packets again */
1455 dev->trans_start = jiffies;
1456 netif_wake_queue(dev);
1460 * This routine will, depending on the values passed to it,
1461 * either make it accept multicast packets, go into
1462 * promiscuous mode (for TCPDUMP and cousins) or accept
1463 * a select set of multicast packets
1465 static void smc_set_multicast_list(struct net_device *dev)
1467 struct smc_local *lp = netdev_priv(dev);
1468 void __iomem *ioaddr = lp->base;
1469 unsigned char multicast_table[8];
1470 int update_multicast = 0;
1472 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1474 if (dev->flags & IFF_PROMISC) {
1475 DBG(2, "%s: RCR_PRMS\n", dev->name);
1476 lp->rcr_cur_mode |= RCR_PRMS;
1479 /* BUG? I never disable promiscuous mode if multicasting was turned on.
1480 Now, I turn off promiscuous mode, but I don't do anything to multicasting
1481 when promiscuous mode is turned on.
1485 * Here, I am setting this to accept all multicast packets.
1486 * I don't need to zero the multicast table, because the flag is
1487 * checked before the table is
1489 else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) {
1490 DBG(2, "%s: RCR_ALMUL\n", dev->name);
1491 lp->rcr_cur_mode |= RCR_ALMUL;
1495 * This sets the internal hardware table to filter out unwanted
1496 * multicast packets before they take up memory.
1498 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1499 * address are the offset into the table. If that bit is 1, then the
1500 * multicast packet is accepted. Otherwise, it's dropped silently.
1502 * To use the 6 bits as an offset into the table, the high 3 bits are
1503 * the number of the 8 bit register, while the low 3 bits are the bit
1504 * within that register.
1506 else if (dev->mc_count) {
1508 struct dev_mc_list *cur_addr;
1510 /* table for flipping the order of 3 bits */
1511 static const unsigned char invert3[] = {0, 4, 2, 6, 1, 5, 3, 7};
1513 /* start with a table of all zeros: reject all */
1514 memset(multicast_table, 0, sizeof(multicast_table));
1516 cur_addr = dev->mc_list;
1517 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
1520 /* do we have a pointer here? */
1523 /* make sure this is a multicast address -
1524 shouldn't this be a given if we have it here ? */
1525 if (!(*cur_addr->dmi_addr & 1))
1528 /* only use the low order bits */
1529 position = crc32_le(~0, cur_addr->dmi_addr, 6) & 0x3f;
1531 /* do some messy swapping to put the bit in the right spot */
1532 multicast_table[invert3[position&7]] |=
1533 (1<<invert3[(position>>3)&7]);
1536 /* be sure I get rid of flags I might have set */
1537 lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL);
1539 /* now, the table can be loaded into the chipset */
1540 update_multicast = 1;
1542 DBG(2, "%s: ~(RCR_PRMS|RCR_ALMUL)\n", dev->name);
1543 lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL);
1546 * since I'm disabling all multicast entirely, I need to
1547 * clear the multicast list
1549 memset(multicast_table, 0, sizeof(multicast_table));
1550 update_multicast = 1;
1553 spin_lock_irq(&lp->lock);
1555 SMC_SET_RCR(lp->rcr_cur_mode);
1556 if (update_multicast) {
1558 SMC_SET_MCAST(multicast_table);
1561 spin_unlock_irq(&lp->lock);
1566 * Open and Initialize the board
1568 * Set up everything, reset the card, etc..
1571 smc_open(struct net_device *dev)
1573 struct smc_local *lp = netdev_priv(dev);
1575 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1578 * Check that the address is valid. If its not, refuse
1579 * to bring the device up. The user must specify an
1580 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1582 if (!is_valid_ether_addr(dev->dev_addr)) {
1583 PRINTK("%s: no valid ethernet hw addr\n", __FUNCTION__);
1587 /* Setup the default Register Modes */
1588 lp->tcr_cur_mode = TCR_DEFAULT;
1589 lp->rcr_cur_mode = RCR_DEFAULT;
1590 lp->rpc_cur_mode = RPC_DEFAULT;
1593 * If we are not using a MII interface, we need to
1594 * monitor our own carrier signal to detect faults.
1596 if (lp->phy_type == 0)
1597 lp->tcr_cur_mode |= TCR_MON_CSN;
1599 /* reset the hardware */
1603 /* Configure the PHY, initialize the link state */
1604 if (lp->phy_type != 0)
1605 smc_phy_configure(dev);
1607 spin_lock_irq(&lp->lock);
1608 smc_10bt_check_media(dev, 1);
1609 spin_unlock_irq(&lp->lock);
1612 netif_start_queue(dev);
1619 * this makes the board clean up everything that it can
1620 * and not talk to the outside world. Caused by
1621 * an 'ifconfig ethX down'
1623 static int smc_close(struct net_device *dev)
1625 struct smc_local *lp = netdev_priv(dev);
1627 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1629 netif_stop_queue(dev);
1630 netif_carrier_off(dev);
1632 /* clear everything */
1634 tasklet_kill(&lp->tx_task);
1635 smc_phy_powerdown(dev);
1640 * Get the current statistics.
1641 * This may be called with the card open or closed.
1643 static struct net_device_stats *smc_query_statistics(struct net_device *dev)
1645 struct smc_local *lp = netdev_priv(dev);
1647 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1656 smc_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1658 struct smc_local *lp = netdev_priv(dev);
1664 if (lp->phy_type != 0) {
1665 spin_lock_irq(&lp->lock);
1666 ret = mii_ethtool_gset(&lp->mii, cmd);
1667 spin_unlock_irq(&lp->lock);
1669 cmd->supported = SUPPORTED_10baseT_Half |
1670 SUPPORTED_10baseT_Full |
1671 SUPPORTED_TP | SUPPORTED_AUI;
1673 if (lp->ctl_rspeed == 10)
1674 cmd->speed = SPEED_10;
1675 else if (lp->ctl_rspeed == 100)
1676 cmd->speed = SPEED_100;
1678 cmd->autoneg = AUTONEG_DISABLE;
1679 cmd->transceiver = XCVR_INTERNAL;
1681 cmd->duplex = lp->tcr_cur_mode & TCR_SWFDUP ? DUPLEX_FULL : DUPLEX_HALF;
1690 smc_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1692 struct smc_local *lp = netdev_priv(dev);
1695 if (lp->phy_type != 0) {
1696 spin_lock_irq(&lp->lock);
1697 ret = mii_ethtool_sset(&lp->mii, cmd);
1698 spin_unlock_irq(&lp->lock);
1700 if (cmd->autoneg != AUTONEG_DISABLE ||
1701 cmd->speed != SPEED_10 ||
1702 (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1703 (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1706 // lp->port = cmd->port;
1707 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1709 // if (netif_running(dev))
1710 // smc_set_port(dev);
1719 smc_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1721 strncpy(info->driver, CARDNAME, sizeof(info->driver));
1722 strncpy(info->version, version, sizeof(info->version));
1723 strncpy(info->bus_info, dev->class_dev.dev->bus_id, sizeof(info->bus_info));
1726 static int smc_ethtool_nwayreset(struct net_device *dev)
1728 struct smc_local *lp = netdev_priv(dev);
1731 if (lp->phy_type != 0) {
1732 spin_lock_irq(&lp->lock);
1733 ret = mii_nway_restart(&lp->mii);
1734 spin_unlock_irq(&lp->lock);
1740 static u32 smc_ethtool_getmsglevel(struct net_device *dev)
1742 struct smc_local *lp = netdev_priv(dev);
1743 return lp->msg_enable;
1746 static void smc_ethtool_setmsglevel(struct net_device *dev, u32 level)
1748 struct smc_local *lp = netdev_priv(dev);
1749 lp->msg_enable = level;
1752 static struct ethtool_ops smc_ethtool_ops = {
1753 .get_settings = smc_ethtool_getsettings,
1754 .set_settings = smc_ethtool_setsettings,
1755 .get_drvinfo = smc_ethtool_getdrvinfo,
1757 .get_msglevel = smc_ethtool_getmsglevel,
1758 .set_msglevel = smc_ethtool_setmsglevel,
1759 .nway_reset = smc_ethtool_nwayreset,
1760 .get_link = ethtool_op_get_link,
1761 // .get_eeprom = smc_ethtool_geteeprom,
1762 // .set_eeprom = smc_ethtool_seteeprom,
1768 * This routine has a simple purpose -- make the SMC chip generate an
1769 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1772 * does this still work?
1774 * I just deleted auto_irq.c, since it was never built...
1777 static int __init smc_findirq(void __iomem *ioaddr)
1780 unsigned long cookie;
1782 DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__);
1784 cookie = probe_irq_on();
1787 * What I try to do here is trigger an ALLOC_INT. This is done
1788 * by allocating a small chunk of memory, which will give an interrupt
1791 /* enable ALLOCation interrupts ONLY */
1793 SMC_SET_INT_MASK(IM_ALLOC_INT);
1796 * Allocate 512 bytes of memory. Note that the chip was just
1797 * reset so all the memory is available
1799 SMC_SET_MMU_CMD(MC_ALLOC | 1);
1802 * Wait until positive that the interrupt has been generated
1807 int_status = SMC_GET_INT();
1808 if (int_status & IM_ALLOC_INT)
1809 break; /* got the interrupt */
1810 } while (--timeout);
1813 * there is really nothing that I can do here if timeout fails,
1814 * as autoirq_report will return a 0 anyway, which is what I
1815 * want in this case. Plus, the clean up is needed in both
1819 /* and disable all interrupts again */
1820 SMC_SET_INT_MASK(0);
1822 /* and return what I found */
1823 return probe_irq_off(cookie);
1827 * Function: smc_probe(unsigned long ioaddr)
1830 * Tests to see if a given ioaddr points to an SMC91x chip.
1831 * Returns a 0 on success
1834 * (1) see if the high byte of BANK_SELECT is 0x33
1835 * (2) compare the ioaddr with the base register's address
1836 * (3) see if I recognize the chip ID in the appropriate register
1838 * Here I do typical initialization tasks.
1840 * o Initialize the structure if needed
1841 * o print out my vanity message if not done so already
1842 * o print out what type of hardware is detected
1843 * o print out the ethernet address
1845 * o set up my private data
1846 * o configure the dev structure with my subroutines
1847 * o actually GRAB the irq.
1850 static int __init smc_probe(struct net_device *dev, void __iomem *ioaddr)
1852 struct smc_local *lp = netdev_priv(dev);
1853 static int version_printed = 0;
1855 unsigned int val, revision_register;
1856 const char *version_string;
1858 DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__);
1860 /* First, see if the high byte is 0x33 */
1861 val = SMC_CURRENT_BANK();
1862 DBG(2, "%s: bank signature probe returned 0x%04x\n", CARDNAME, val);
1863 if ((val & 0xFF00) != 0x3300) {
1864 if ((val & 0xFF) == 0x33) {
1866 "%s: Detected possible byte-swapped interface"
1867 " at IOADDR %p\n", CARDNAME, ioaddr);
1874 * The above MIGHT indicate a device, but I need to write to
1875 * further test this.
1878 val = SMC_CURRENT_BANK();
1879 if ((val & 0xFF00) != 0x3300) {
1885 * well, we've already written once, so hopefully another
1886 * time won't hurt. This time, I need to switch the bank
1887 * register to bank 1, so I can access the base address
1891 val = SMC_GET_BASE();
1892 val = ((val & 0x1F00) >> 3) << SMC_IO_SHIFT;
1893 if (((unsigned int)ioaddr & (0x3e0 << SMC_IO_SHIFT)) != val) {
1894 printk("%s: IOADDR %p doesn't match configuration (%x).\n",
1895 CARDNAME, ioaddr, val);
1899 * check if the revision register is something that I
1900 * recognize. These might need to be added to later,
1901 * as future revisions could be added.
1904 revision_register = SMC_GET_REV();
1905 DBG(2, "%s: revision = 0x%04x\n", CARDNAME, revision_register);
1906 version_string = chip_ids[ (revision_register >> 4) & 0xF];
1907 if (!version_string || (revision_register & 0xff00) != 0x3300) {
1908 /* I don't recognize this chip, so... */
1909 printk("%s: IO %p: Unrecognized revision register 0x%04x"
1910 ", Contact author.\n", CARDNAME,
1911 ioaddr, revision_register);
1917 /* At this point I'll assume that the chip is an SMC91x. */
1918 if (version_printed++ == 0)
1919 printk("%s", version);
1921 /* fill in some of the fields */
1922 dev->base_addr = (unsigned long)ioaddr;
1924 lp->version = revision_register & 0xff;
1925 spin_lock_init(&lp->lock);
1927 /* Get the MAC address */
1929 SMC_GET_MAC_ADDR(dev->dev_addr);
1931 /* now, reset the chip, and put it into a known state */
1935 * If dev->irq is 0, then the device has to be banged on to see
1938 * This banging doesn't always detect the IRQ, for unknown reasons.
1939 * a workaround is to reset the chip and try again.
1941 * Interestingly, the DOS packet driver *SETS* the IRQ on the card to
1942 * be what is requested on the command line. I don't do that, mostly
1943 * because the card that I have uses a non-standard method of accessing
1944 * the IRQs, and because this _should_ work in most configurations.
1946 * Specifying an IRQ is done with the assumption that the user knows
1947 * what (s)he is doing. No checking is done!!!!
1954 dev->irq = smc_findirq(ioaddr);
1957 /* kick the card and try again */
1961 if (dev->irq == 0) {
1962 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
1967 dev->irq = irq_canonicalize(dev->irq);
1969 /* Fill in the fields of the device structure with ethernet values. */
1972 dev->open = smc_open;
1973 dev->stop = smc_close;
1974 dev->hard_start_xmit = smc_hard_start_xmit;
1975 dev->tx_timeout = smc_timeout;
1976 dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1977 dev->get_stats = smc_query_statistics;
1978 dev->set_multicast_list = smc_set_multicast_list;
1979 dev->ethtool_ops = &smc_ethtool_ops;
1980 #ifdef CONFIG_NET_POLL_CONTROLLER
1981 dev->poll_controller = smc_poll_controller;
1984 tasklet_init(&lp->tx_task, smc_hardware_send_pkt, (unsigned long)dev);
1985 INIT_WORK(&lp->phy_configure, smc_phy_configure, dev);
1986 lp->mii.phy_id_mask = 0x1f;
1987 lp->mii.reg_num_mask = 0x1f;
1988 lp->mii.force_media = 0;
1989 lp->mii.full_duplex = 0;
1991 lp->mii.mdio_read = smc_phy_read;
1992 lp->mii.mdio_write = smc_phy_write;
1995 * Locate the phy, if any.
1997 if (lp->version >= (CHIP_91100 << 4))
1998 smc_phy_detect(dev);
2000 /* then shut everything down to save power */
2002 smc_phy_powerdown(dev);
2004 /* Set default parameters */
2005 lp->msg_enable = NETIF_MSG_LINK;
2006 lp->ctl_rfduplx = 0;
2007 lp->ctl_rspeed = 10;
2009 if (lp->version >= (CHIP_91100 << 4)) {
2010 lp->ctl_rfduplx = 1;
2011 lp->ctl_rspeed = 100;
2015 retval = request_irq(dev->irq, &smc_interrupt, 0, dev->name, dev);
2019 set_irq_type(dev->irq, SMC_IRQ_TRIGGER_TYPE);
2021 #ifdef SMC_USE_PXA_DMA
2023 int dma = pxa_request_dma(dev->name, DMA_PRIO_LOW,
2024 smc_pxa_dma_irq, NULL);
2030 retval = register_netdev(dev);
2032 /* now, print out the card info, in a short format.. */
2033 printk("%s: %s (rev %d) at %p IRQ %d",
2034 dev->name, version_string, revision_register & 0x0f,
2035 lp->base, dev->irq);
2037 if (dev->dma != (unsigned char)-1)
2038 printk(" DMA %d", dev->dma);
2040 printk("%s%s\n", nowait ? " [nowait]" : "",
2041 THROTTLE_TX_PKTS ? " [throttle_tx]" : "");
2043 if (!is_valid_ether_addr(dev->dev_addr)) {
2044 printk("%s: Invalid ethernet MAC address. Please "
2045 "set using ifconfig\n", dev->name);
2047 /* Print the Ethernet address */
2048 printk("%s: Ethernet addr: ", dev->name);
2049 for (i = 0; i < 5; i++)
2050 printk("%2.2x:", dev->dev_addr[i]);
2051 printk("%2.2x\n", dev->dev_addr[5]);
2054 if (lp->phy_type == 0) {
2055 PRINTK("%s: No PHY found\n", dev->name);
2056 } else if ((lp->phy_type & 0xfffffff0) == 0x0016f840) {
2057 PRINTK("%s: PHY LAN83C183 (LAN91C111 Internal)\n", dev->name);
2058 } else if ((lp->phy_type & 0xfffffff0) == 0x02821c50) {
2059 PRINTK("%s: PHY LAN83C180\n", dev->name);
2064 #ifdef SMC_USE_PXA_DMA
2065 if (retval && dev->dma != (unsigned char)-1)
2066 pxa_free_dma(dev->dma);
2071 static int smc_enable_device(struct platform_device *pdev)
2073 unsigned long flags;
2074 unsigned char ecor, ecsr;
2076 struct resource * res;
2078 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2083 * Map the attribute space. This is overkill, but clean.
2085 addr = ioremap(res->start, ATTRIB_SIZE);
2090 * Reset the device. We must disable IRQs around this
2091 * since a reset causes the IRQ line become active.
2093 local_irq_save(flags);
2094 ecor = readb(addr + (ECOR << SMC_IO_SHIFT)) & ~ECOR_RESET;
2095 writeb(ecor | ECOR_RESET, addr + (ECOR << SMC_IO_SHIFT));
2096 readb(addr + (ECOR << SMC_IO_SHIFT));
2099 * Wait 100us for the chip to reset.
2104 * The device will ignore all writes to the enable bit while
2105 * reset is asserted, even if the reset bit is cleared in the
2106 * same write. Must clear reset first, then enable the device.
2108 writeb(ecor, addr + (ECOR << SMC_IO_SHIFT));
2109 writeb(ecor | ECOR_ENABLE, addr + (ECOR << SMC_IO_SHIFT));
2112 * Set the appropriate byte/word mode.
2114 ecsr = readb(addr + (ECSR << SMC_IO_SHIFT)) & ~ECSR_IOIS8;
2115 #ifndef SMC_CAN_USE_16BIT
2118 writeb(ecsr, addr + (ECSR << SMC_IO_SHIFT));
2119 local_irq_restore(flags);
2124 * Wait for the chip to wake up. We could poll the control
2125 * register in the main register space, but that isn't mapped
2126 * yet. We know this is going to take 750us.
2133 static int smc_request_attrib(struct platform_device *pdev)
2135 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2140 if (!request_mem_region(res->start, ATTRIB_SIZE, CARDNAME))
2146 static void smc_release_attrib(struct platform_device *pdev)
2148 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2151 release_mem_region(res->start, ATTRIB_SIZE);
2154 #ifdef SMC_CAN_USE_DATACS
2155 static void smc_request_datacs(struct platform_device *pdev, struct net_device *ndev)
2157 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32");
2158 struct smc_local *lp = netdev_priv(ndev);
2163 if(!request_mem_region(res->start, SMC_DATA_EXTENT, CARDNAME)) {
2164 printk(KERN_INFO "%s: failed to request datacs memory region.\n", CARDNAME);
2168 lp->datacs = ioremap(res->start, SMC_DATA_EXTENT);
2171 static void smc_release_datacs(struct platform_device *pdev, struct net_device *ndev)
2173 struct smc_local *lp = netdev_priv(ndev);
2174 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32");
2177 iounmap(lp->datacs);
2182 release_mem_region(res->start, SMC_DATA_EXTENT);
2185 static void smc_request_datacs(struct platform_device *pdev, struct net_device *ndev) {}
2186 static void smc_release_datacs(struct platform_device *pdev, struct net_device *ndev) {}
2192 * dev->base_addr == 0, try to find all possible locations
2193 * dev->base_addr > 0x1ff, this is the address to check
2194 * dev->base_addr == <anything else>, return failure code
2197 * 0 --> there is a device
2198 * anything else, error
2200 static int smc_drv_probe(struct platform_device *pdev)
2202 struct net_device *ndev;
2203 struct resource *res;
2204 unsigned int __iomem *addr;
2207 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
2209 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2216 if (!request_mem_region(res->start, SMC_IO_EXTENT, CARDNAME)) {
2221 ndev = alloc_etherdev(sizeof(struct smc_local));
2223 printk("%s: could not allocate device.\n", CARDNAME);
2225 goto out_release_io;
2227 SET_MODULE_OWNER(ndev);
2228 SET_NETDEV_DEV(ndev, &pdev->dev);
2230 ndev->dma = (unsigned char)-1;
2231 ndev->irq = platform_get_irq(pdev, 0);
2233 ret = smc_request_attrib(pdev);
2235 goto out_free_netdev;
2236 #if defined(CONFIG_SA1100_ASSABET)
2237 NCR_0 |= NCR_ENET_OSC_EN;
2239 ret = smc_enable_device(pdev);
2241 goto out_release_attrib;
2243 addr = ioremap(res->start, SMC_IO_EXTENT);
2246 goto out_release_attrib;
2249 platform_set_drvdata(pdev, ndev);
2250 ret = smc_probe(ndev, addr);
2253 #ifdef SMC_USE_PXA_DMA
2255 struct smc_local *lp = netdev_priv(ndev);
2256 lp->physaddr = res->start;
2260 smc_request_datacs(pdev, ndev);
2265 platform_set_drvdata(pdev, NULL);
2268 smc_release_attrib(pdev);
2272 release_mem_region(res->start, SMC_IO_EXTENT);
2274 printk("%s: not found (%d).\n", CARDNAME, ret);
2279 static int smc_drv_remove(struct platform_device *pdev)
2281 struct net_device *ndev = platform_get_drvdata(pdev);
2282 struct smc_local *lp = netdev_priv(ndev);
2283 struct resource *res;
2285 platform_set_drvdata(pdev, NULL);
2287 unregister_netdev(ndev);
2289 free_irq(ndev->irq, ndev);
2291 #ifdef SMC_USE_PXA_DMA
2292 if (ndev->dma != (unsigned char)-1)
2293 pxa_free_dma(ndev->dma);
2297 smc_release_datacs(pdev,ndev);
2298 smc_release_attrib(pdev);
2300 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
2302 platform_get_resource(pdev, IORESOURCE_MEM, 0);
2303 release_mem_region(res->start, SMC_IO_EXTENT);
2310 static int smc_drv_suspend(struct platform_device *dev, pm_message_t state)
2312 struct net_device *ndev = platform_get_drvdata(dev);
2315 if (netif_running(ndev)) {
2316 netif_device_detach(ndev);
2318 smc_phy_powerdown(ndev);
2324 static int smc_drv_resume(struct platform_device *dev)
2326 struct net_device *ndev = platform_get_drvdata(dev);
2329 struct smc_local *lp = netdev_priv(ndev);
2330 smc_enable_device(dev);
2331 if (netif_running(ndev)) {
2334 if (lp->phy_type != 0)
2335 smc_phy_configure(ndev);
2336 netif_device_attach(ndev);
2342 static struct platform_driver smc_driver = {
2343 .probe = smc_drv_probe,
2344 .remove = smc_drv_remove,
2345 .suspend = smc_drv_suspend,
2346 .resume = smc_drv_resume,
2352 static int __init smc_init(void)
2358 "%s: You shouldn't use auto-probing with insmod!\n",
2363 return platform_driver_register(&smc_driver);
2366 static void __exit smc_cleanup(void)
2368 platform_driver_unregister(&smc_driver);
2371 module_init(smc_init);
2372 module_exit(smc_cleanup);