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
);
505 if (unlikely(packet_len
< 6 || status
& RS_ERRORS
)) {
506 if (status
& RS_TOOLONG
&& packet_len
<= (1514 + 4 + 6)) {
507 /* accept VLAN packets */
508 status
&= ~RS_TOOLONG
;
511 if (packet_len
< 6) {
512 /* bloody hardware */
513 printk(KERN_ERR
"%s: fubar (rxlen %u status %x\n",
514 dev
->name
, packet_len
, status
);
515 status
|= RS_TOOSHORT
;
518 SMC_SET_MMU_CMD(MC_RELEASE
);
519 lp
->stats
.rx_errors
++;
520 if (status
& RS_ALGNERR
)
521 lp
->stats
.rx_frame_errors
++;
522 if (status
& (RS_TOOSHORT
| RS_TOOLONG
))
523 lp
->stats
.rx_length_errors
++;
524 if (status
& RS_BADCRC
)
525 lp
->stats
.rx_crc_errors
++;
529 unsigned int data_len
;
531 /* set multicast stats */
532 if (status
& RS_MULTICAST
)
533 lp
->stats
.multicast
++;
536 * Actual payload is packet_len - 6 (or 5 if odd byte).
537 * We want skb_reserve(2) and the final ctrl word
538 * (2 bytes, possibly containing the payload odd byte).
539 * Furthermore, we add 2 bytes to allow rounding up to
540 * multiple of 4 bytes on 32 bit buses.
541 * Hence packet_len - 6 + 2 + 2 + 2.
543 skb
= dev_alloc_skb(packet_len
);
544 if (unlikely(skb
== NULL
)) {
545 printk(KERN_NOTICE
"%s: Low memory, packet dropped.\n",
548 SMC_SET_MMU_CMD(MC_RELEASE
);
549 lp
->stats
.rx_dropped
++;
553 /* Align IP header to 32 bits */
556 /* BUG: the LAN91C111 rev A never sets this bit. Force it. */
557 if (lp
->version
== 0x90)
558 status
|= RS_ODDFRAME
;
561 * If odd length: packet_len - 5,
562 * otherwise packet_len - 6.
563 * With the trailing ctrl byte it's packet_len - 4.
565 data_len
= packet_len
- ((status
& RS_ODDFRAME
) ? 5 : 6);
566 data
= skb_put(skb
, data_len
);
567 SMC_PULL_DATA(data
, packet_len
- 4);
570 SMC_SET_MMU_CMD(MC_RELEASE
);
572 PRINT_PKT(data
, packet_len
- 4);
574 dev
->last_rx
= jiffies
;
576 skb
->protocol
= eth_type_trans(skb
, dev
);
578 lp
->stats
.rx_packets
++;
579 lp
->stats
.rx_bytes
+= data_len
;
585 * On SMP we have the following problem:
587 * A = smc_hardware_send_pkt()
588 * B = smc_hard_start_xmit()
589 * C = smc_interrupt()
591 * A and B can never be executed simultaneously. However, at least on UP,
592 * it is possible (and even desirable) for C to interrupt execution of
593 * A or B in order to have better RX reliability and avoid overruns.
594 * C, just like A and B, must have exclusive access to the chip and
595 * each of them must lock against any other concurrent access.
596 * Unfortunately this is not possible to have C suspend execution of A or
597 * B taking place on another CPU. On UP this is no an issue since A and B
598 * are run from softirq context and C from hard IRQ context, and there is
599 * no other CPU where concurrent access can happen.
600 * If ever there is a way to force at least B and C to always be executed
601 * on the same CPU then we could use read/write locks to protect against
602 * any other concurrent access and C would always interrupt B. But life
603 * isn't that easy in a SMP world...
605 #define smc_special_trylock(lock) \
608 local_irq_disable(); \
609 __ret = spin_trylock(lock); \
611 local_irq_enable(); \
614 #define smc_special_lock(lock) spin_lock_irq(lock)
615 #define smc_special_unlock(lock) spin_unlock_irq(lock)
617 #define smc_special_trylock(lock) (1)
618 #define smc_special_lock(lock) do { } while (0)
619 #define smc_special_unlock(lock) do { } while (0)
623 * This is called to actually send a packet to the chip.
625 static void smc_hardware_send_pkt(unsigned long data
)
627 struct net_device
*dev
= (struct net_device
*)data
;
628 struct smc_local
*lp
= netdev_priv(dev
);
629 void __iomem
*ioaddr
= lp
->base
;
631 unsigned int packet_no
, len
;
634 DBG(3, "%s: %s\n", dev
->name
, __FUNCTION__
);
636 if (!smc_special_trylock(&lp
->lock
)) {
637 netif_stop_queue(dev
);
638 tasklet_schedule(&lp
->tx_task
);
642 skb
= lp
->pending_tx_skb
;
643 if (unlikely(!skb
)) {
644 smc_special_unlock(&lp
->lock
);
647 lp
->pending_tx_skb
= NULL
;
649 packet_no
= SMC_GET_AR();
650 if (unlikely(packet_no
& AR_FAILED
)) {
651 printk("%s: Memory allocation failed.\n", dev
->name
);
652 lp
->stats
.tx_errors
++;
653 lp
->stats
.tx_fifo_errors
++;
654 smc_special_unlock(&lp
->lock
);
658 /* point to the beginning of the packet */
659 SMC_SET_PN(packet_no
);
660 SMC_SET_PTR(PTR_AUTOINC
);
664 DBG(2, "%s: TX PNR 0x%x LENGTH 0x%04x (%d) BUF 0x%p\n",
665 dev
->name
, packet_no
, len
, len
, buf
);
669 * Send the packet length (+6 for status words, length, and ctl.
670 * The card will pad to 64 bytes with zeroes if packet is too small.
672 SMC_PUT_PKT_HDR(0, len
+ 6);
674 /* send the actual data */
675 SMC_PUSH_DATA(buf
, len
& ~1);
677 /* Send final ctl word with the last byte if there is one */
678 SMC_outw(((len
& 1) ? (0x2000 | buf
[len
-1]) : 0), ioaddr
, DATA_REG
);
681 * If THROTTLE_TX_PKTS is set, we stop the queue here. This will
682 * have the effect of having at most one packet queued for TX
683 * in the chip's memory at all time.
685 * If THROTTLE_TX_PKTS is not set then the queue is stopped only
686 * when memory allocation (MC_ALLOC) does not succeed right away.
688 if (THROTTLE_TX_PKTS
)
689 netif_stop_queue(dev
);
691 /* queue the packet for TX */
692 SMC_SET_MMU_CMD(MC_ENQUEUE
);
693 smc_special_unlock(&lp
->lock
);
695 dev
->trans_start
= jiffies
;
696 lp
->stats
.tx_packets
++;
697 lp
->stats
.tx_bytes
+= len
;
699 SMC_ENABLE_INT(IM_TX_INT
| IM_TX_EMPTY_INT
);
701 done
: if (!THROTTLE_TX_PKTS
)
702 netif_wake_queue(dev
);
708 * Since I am not sure if I will have enough room in the chip's ram
709 * to store the packet, I call this routine which either sends it
710 * now, or set the card to generates an interrupt when ready
713 static int smc_hard_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
715 struct smc_local
*lp
= netdev_priv(dev
);
716 void __iomem
*ioaddr
= lp
->base
;
717 unsigned int numPages
, poll_count
, status
;
719 DBG(3, "%s: %s\n", dev
->name
, __FUNCTION__
);
721 BUG_ON(lp
->pending_tx_skb
!= NULL
);
724 * The MMU wants the number of pages to be the number of 256 bytes
725 * 'pages', minus 1 (since a packet can't ever have 0 pages :))
727 * The 91C111 ignores the size bits, but earlier models don't.
729 * Pkt size for allocating is data length +6 (for additional status
730 * words, length and ctl)
732 * If odd size then last byte is included in ctl word.
734 numPages
= ((skb
->len
& ~1) + (6 - 1)) >> 8;
735 if (unlikely(numPages
> 7)) {
736 printk("%s: Far too big packet error.\n", dev
->name
);
737 lp
->stats
.tx_errors
++;
738 lp
->stats
.tx_dropped
++;
743 smc_special_lock(&lp
->lock
);
745 /* now, try to allocate the memory */
746 SMC_SET_MMU_CMD(MC_ALLOC
| numPages
);
749 * Poll the chip for a short amount of time in case the
750 * allocation succeeds quickly.
752 poll_count
= MEMORY_WAIT_TIME
;
754 status
= SMC_GET_INT();
755 if (status
& IM_ALLOC_INT
) {
756 SMC_ACK_INT(IM_ALLOC_INT
);
759 } while (--poll_count
);
761 smc_special_unlock(&lp
->lock
);
763 lp
->pending_tx_skb
= skb
;
765 /* oh well, wait until the chip finds memory later */
766 netif_stop_queue(dev
);
767 DBG(2, "%s: TX memory allocation deferred.\n", dev
->name
);
768 SMC_ENABLE_INT(IM_ALLOC_INT
);
771 * Allocation succeeded: push packet to the chip's own memory
774 smc_hardware_send_pkt((unsigned long)dev
);
781 * This handles a TX interrupt, which is only called when:
782 * - a TX error occurred, or
783 * - CTL_AUTO_RELEASE is not set and TX of a packet completed.
785 static void smc_tx(struct net_device
*dev
)
787 struct smc_local
*lp
= netdev_priv(dev
);
788 void __iomem
*ioaddr
= lp
->base
;
789 unsigned int saved_packet
, packet_no
, tx_status
, pkt_len
;
791 DBG(3, "%s: %s\n", dev
->name
, __FUNCTION__
);
793 /* If the TX FIFO is empty then nothing to do */
794 packet_no
= SMC_GET_TXFIFO();
795 if (unlikely(packet_no
& TXFIFO_TEMPTY
)) {
796 PRINTK("%s: smc_tx with nothing on FIFO.\n", dev
->name
);
800 /* select packet to read from */
801 saved_packet
= SMC_GET_PN();
802 SMC_SET_PN(packet_no
);
804 /* read the first word (status word) from this packet */
805 SMC_SET_PTR(PTR_AUTOINC
| PTR_READ
);
806 SMC_GET_PKT_HDR(tx_status
, pkt_len
);
807 DBG(2, "%s: TX STATUS 0x%04x PNR 0x%02x\n",
808 dev
->name
, tx_status
, packet_no
);
810 if (!(tx_status
& ES_TX_SUC
))
811 lp
->stats
.tx_errors
++;
813 if (tx_status
& ES_LOSTCARR
)
814 lp
->stats
.tx_carrier_errors
++;
816 if (tx_status
& (ES_LATCOL
| ES_16COL
)) {
817 PRINTK("%s: %s occurred on last xmit\n", dev
->name
,
818 (tx_status
& ES_LATCOL
) ?
819 "late collision" : "too many collisions");
820 lp
->stats
.tx_window_errors
++;
821 if (!(lp
->stats
.tx_window_errors
& 63) && net_ratelimit()) {
822 printk(KERN_INFO
"%s: unexpectedly large number of "
823 "bad collisions. Please check duplex "
824 "setting.\n", dev
->name
);
828 /* kill the packet */
830 SMC_SET_MMU_CMD(MC_FREEPKT
);
832 /* Don't restore Packet Number Reg until busy bit is cleared */
834 SMC_SET_PN(saved_packet
);
836 /* re-enable transmit */
838 SMC_SET_TCR(lp
->tcr_cur_mode
);
843 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
845 static void smc_mii_out(struct net_device
*dev
, unsigned int val
, int bits
)
847 struct smc_local
*lp
= netdev_priv(dev
);
848 void __iomem
*ioaddr
= lp
->base
;
849 unsigned int mii_reg
, mask
;
851 mii_reg
= SMC_GET_MII() & ~(MII_MCLK
| MII_MDOE
| MII_MDO
);
854 for (mask
= 1 << (bits
- 1); mask
; mask
>>= 1) {
860 SMC_SET_MII(mii_reg
);
862 SMC_SET_MII(mii_reg
| MII_MCLK
);
867 static unsigned int smc_mii_in(struct net_device
*dev
, int bits
)
869 struct smc_local
*lp
= netdev_priv(dev
);
870 void __iomem
*ioaddr
= lp
->base
;
871 unsigned int mii_reg
, mask
, val
;
873 mii_reg
= SMC_GET_MII() & ~(MII_MCLK
| MII_MDOE
| MII_MDO
);
874 SMC_SET_MII(mii_reg
);
876 for (mask
= 1 << (bits
- 1), val
= 0; mask
; mask
>>= 1) {
877 if (SMC_GET_MII() & MII_MDI
)
880 SMC_SET_MII(mii_reg
);
882 SMC_SET_MII(mii_reg
| MII_MCLK
);
890 * Reads a register from the MII Management serial interface
892 static int smc_phy_read(struct net_device
*dev
, int phyaddr
, int phyreg
)
894 struct smc_local
*lp
= netdev_priv(dev
);
895 void __iomem
*ioaddr
= lp
->base
;
896 unsigned int phydata
;
901 smc_mii_out(dev
, 0xffffffff, 32);
903 /* Start code (01) + read (10) + phyaddr + phyreg */
904 smc_mii_out(dev
, 6 << 10 | phyaddr
<< 5 | phyreg
, 14);
906 /* Turnaround (2bits) + phydata */
907 phydata
= smc_mii_in(dev
, 18);
909 /* Return to idle state */
910 SMC_SET_MII(SMC_GET_MII() & ~(MII_MCLK
|MII_MDOE
|MII_MDO
));
912 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
913 __FUNCTION__
, phyaddr
, phyreg
, phydata
);
920 * Writes a register to the MII Management serial interface
922 static void smc_phy_write(struct net_device
*dev
, int phyaddr
, int phyreg
,
925 struct smc_local
*lp
= netdev_priv(dev
);
926 void __iomem
*ioaddr
= lp
->base
;
931 smc_mii_out(dev
, 0xffffffff, 32);
933 /* Start code (01) + write (01) + phyaddr + phyreg + turnaround + phydata */
934 smc_mii_out(dev
, 5 << 28 | phyaddr
<< 23 | phyreg
<< 18 | 2 << 16 | phydata
, 32);
936 /* Return to idle state */
937 SMC_SET_MII(SMC_GET_MII() & ~(MII_MCLK
|MII_MDOE
|MII_MDO
));
939 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
940 __FUNCTION__
, phyaddr
, phyreg
, phydata
);
946 * Finds and reports the PHY address
948 static void smc_phy_detect(struct net_device
*dev
)
950 struct smc_local
*lp
= netdev_priv(dev
);
953 DBG(2, "%s: %s\n", dev
->name
, __FUNCTION__
);
958 * Scan all 32 PHY addresses if necessary, starting at
959 * PHY#1 to PHY#31, and then PHY#0 last.
961 for (phyaddr
= 1; phyaddr
< 33; ++phyaddr
) {
962 unsigned int id1
, id2
;
964 /* Read the PHY identifiers */
965 id1
= smc_phy_read(dev
, phyaddr
& 31, MII_PHYSID1
);
966 id2
= smc_phy_read(dev
, phyaddr
& 31, MII_PHYSID2
);
968 DBG(3, "%s: phy_id1=0x%x, phy_id2=0x%x\n",
969 dev
->name
, id1
, id2
);
971 /* Make sure it is a valid identifier */
972 if (id1
!= 0x0000 && id1
!= 0xffff && id1
!= 0x8000 &&
973 id2
!= 0x0000 && id2
!= 0xffff && id2
!= 0x8000) {
974 /* Save the PHY's address */
975 lp
->mii
.phy_id
= phyaddr
& 31;
976 lp
->phy_type
= id1
<< 16 | id2
;
983 * Sets the PHY to a configuration as determined by the user
985 static int smc_phy_fixed(struct net_device
*dev
)
987 struct smc_local
*lp
= netdev_priv(dev
);
988 void __iomem
*ioaddr
= lp
->base
;
989 int phyaddr
= lp
->mii
.phy_id
;
992 DBG(3, "%s: %s\n", dev
->name
, __FUNCTION__
);
994 /* Enter Link Disable state */
995 cfg1
= smc_phy_read(dev
, phyaddr
, PHY_CFG1_REG
);
996 cfg1
|= PHY_CFG1_LNKDIS
;
997 smc_phy_write(dev
, phyaddr
, PHY_CFG1_REG
, cfg1
);
1000 * Set our fixed capabilities
1001 * Disable auto-negotiation
1005 if (lp
->ctl_rfduplx
)
1006 bmcr
|= BMCR_FULLDPLX
;
1008 if (lp
->ctl_rspeed
== 100)
1009 bmcr
|= BMCR_SPEED100
;
1011 /* Write our capabilities to the phy control register */
1012 smc_phy_write(dev
, phyaddr
, MII_BMCR
, bmcr
);
1014 /* Re-Configure the Receive/Phy Control register */
1016 SMC_SET_RPC(lp
->rpc_cur_mode
);
1023 * smc_phy_reset - reset the phy
1027 * Issue a software reset for the specified PHY and
1028 * wait up to 100ms for the reset to complete. We should
1029 * not access the PHY for 50ms after issuing the reset.
1031 * The time to wait appears to be dependent on the PHY.
1033 * Must be called with lp->lock locked.
1035 static int smc_phy_reset(struct net_device
*dev
, int phy
)
1037 struct smc_local
*lp
= netdev_priv(dev
);
1041 smc_phy_write(dev
, phy
, MII_BMCR
, BMCR_RESET
);
1043 for (timeout
= 2; timeout
; timeout
--) {
1044 spin_unlock_irq(&lp
->lock
);
1046 spin_lock_irq(&lp
->lock
);
1048 bmcr
= smc_phy_read(dev
, phy
, MII_BMCR
);
1049 if (!(bmcr
& BMCR_RESET
))
1053 return bmcr
& BMCR_RESET
;
1057 * smc_phy_powerdown - powerdown phy
1060 * Power down the specified PHY
1062 static void smc_phy_powerdown(struct net_device
*dev
)
1064 struct smc_local
*lp
= netdev_priv(dev
);
1066 int phy
= lp
->mii
.phy_id
;
1068 if (lp
->phy_type
== 0)
1071 /* We need to ensure that no calls to smc_phy_configure are
1074 flush_scheduled_work() cannot be called because we are
1075 running with the netlink semaphore held (from
1076 devinet_ioctl()) and the pending work queue contains
1077 linkwatch_event() (scheduled by netif_carrier_off()
1078 above). linkwatch_event() also wants the netlink semaphore.
1080 while(lp
->work_pending
)
1083 bmcr
= smc_phy_read(dev
, phy
, MII_BMCR
);
1084 smc_phy_write(dev
, phy
, MII_BMCR
, bmcr
| BMCR_PDOWN
);
1088 * smc_phy_check_media - check the media status and adjust TCR
1090 * @init: set true for initialisation
1092 * Select duplex mode depending on negotiation state. This
1093 * also updates our carrier state.
1095 static void smc_phy_check_media(struct net_device
*dev
, int init
)
1097 struct smc_local
*lp
= netdev_priv(dev
);
1098 void __iomem
*ioaddr
= lp
->base
;
1100 if (mii_check_media(&lp
->mii
, netif_msg_link(lp
), init
)) {
1101 /* duplex state has changed */
1102 if (lp
->mii
.full_duplex
) {
1103 lp
->tcr_cur_mode
|= TCR_SWFDUP
;
1105 lp
->tcr_cur_mode
&= ~TCR_SWFDUP
;
1109 SMC_SET_TCR(lp
->tcr_cur_mode
);
1114 * Configures the specified PHY through the MII management interface
1115 * using Autonegotiation.
1116 * Calls smc_phy_fixed() if the user has requested a certain config.
1117 * If RPC ANEG bit is set, the media selection is dependent purely on
1118 * the selection by the MII (either in the MII BMCR reg or the result
1119 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
1120 * is controlled by the RPC SPEED and RPC DPLX bits.
1122 static void smc_phy_configure(void *data
)
1124 struct net_device
*dev
= data
;
1125 struct smc_local
*lp
= netdev_priv(dev
);
1126 void __iomem
*ioaddr
= lp
->base
;
1127 int phyaddr
= lp
->mii
.phy_id
;
1128 int my_phy_caps
; /* My PHY capabilities */
1129 int my_ad_caps
; /* My Advertised capabilities */
1132 DBG(3, "%s:smc_program_phy()\n", dev
->name
);
1134 spin_lock_irq(&lp
->lock
);
1137 * We should not be called if phy_type is zero.
1139 if (lp
->phy_type
== 0)
1140 goto smc_phy_configure_exit
;
1142 if (smc_phy_reset(dev
, phyaddr
)) {
1143 printk("%s: PHY reset timed out\n", dev
->name
);
1144 goto smc_phy_configure_exit
;
1148 * Enable PHY Interrupts (for register 18)
1149 * Interrupts listed here are disabled
1151 smc_phy_write(dev
, phyaddr
, PHY_MASK_REG
,
1152 PHY_INT_LOSSSYNC
| PHY_INT_CWRD
| PHY_INT_SSD
|
1153 PHY_INT_ESD
| PHY_INT_RPOL
| PHY_INT_JAB
|
1154 PHY_INT_SPDDET
| PHY_INT_DPLXDET
);
1156 /* Configure the Receive/Phy Control register */
1158 SMC_SET_RPC(lp
->rpc_cur_mode
);
1160 /* If the user requested no auto neg, then go set his request */
1161 if (lp
->mii
.force_media
) {
1163 goto smc_phy_configure_exit
;
1166 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
1167 my_phy_caps
= smc_phy_read(dev
, phyaddr
, MII_BMSR
);
1169 if (!(my_phy_caps
& BMSR_ANEGCAPABLE
)) {
1170 printk(KERN_INFO
"Auto negotiation NOT supported\n");
1172 goto smc_phy_configure_exit
;
1175 my_ad_caps
= ADVERTISE_CSMA
; /* I am CSMA capable */
1177 if (my_phy_caps
& BMSR_100BASE4
)
1178 my_ad_caps
|= ADVERTISE_100BASE4
;
1179 if (my_phy_caps
& BMSR_100FULL
)
1180 my_ad_caps
|= ADVERTISE_100FULL
;
1181 if (my_phy_caps
& BMSR_100HALF
)
1182 my_ad_caps
|= ADVERTISE_100HALF
;
1183 if (my_phy_caps
& BMSR_10FULL
)
1184 my_ad_caps
|= ADVERTISE_10FULL
;
1185 if (my_phy_caps
& BMSR_10HALF
)
1186 my_ad_caps
|= ADVERTISE_10HALF
;
1188 /* Disable capabilities not selected by our user */
1189 if (lp
->ctl_rspeed
!= 100)
1190 my_ad_caps
&= ~(ADVERTISE_100BASE4
|ADVERTISE_100FULL
|ADVERTISE_100HALF
);
1192 if (!lp
->ctl_rfduplx
)
1193 my_ad_caps
&= ~(ADVERTISE_100FULL
|ADVERTISE_10FULL
);
1195 /* Update our Auto-Neg Advertisement Register */
1196 smc_phy_write(dev
, phyaddr
, MII_ADVERTISE
, my_ad_caps
);
1197 lp
->mii
.advertising
= my_ad_caps
;
1200 * Read the register back. Without this, it appears that when
1201 * auto-negotiation is restarted, sometimes it isn't ready and
1202 * the link does not come up.
1204 status
= smc_phy_read(dev
, phyaddr
, MII_ADVERTISE
);
1206 DBG(2, "%s: phy caps=%x\n", dev
->name
, my_phy_caps
);
1207 DBG(2, "%s: phy advertised caps=%x\n", dev
->name
, my_ad_caps
);
1209 /* Restart auto-negotiation process in order to advertise my caps */
1210 smc_phy_write(dev
, phyaddr
, MII_BMCR
, BMCR_ANENABLE
| BMCR_ANRESTART
);
1212 smc_phy_check_media(dev
, 1);
1214 smc_phy_configure_exit
:
1216 spin_unlock_irq(&lp
->lock
);
1217 lp
->work_pending
= 0;
1223 * Purpose: Handle interrupts relating to PHY register 18. This is
1224 * called from the "hard" interrupt handler under our private spinlock.
1226 static void smc_phy_interrupt(struct net_device
*dev
)
1228 struct smc_local
*lp
= netdev_priv(dev
);
1229 int phyaddr
= lp
->mii
.phy_id
;
1232 DBG(2, "%s: %s\n", dev
->name
, __FUNCTION__
);
1234 if (lp
->phy_type
== 0)
1238 smc_phy_check_media(dev
, 0);
1240 /* Read PHY Register 18, Status Output */
1241 phy18
= smc_phy_read(dev
, phyaddr
, PHY_INT_REG
);
1242 if ((phy18
& PHY_INT_INT
) == 0)
1247 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1249 static void smc_10bt_check_media(struct net_device
*dev
, int init
)
1251 struct smc_local
*lp
= netdev_priv(dev
);
1252 void __iomem
*ioaddr
= lp
->base
;
1253 unsigned int old_carrier
, new_carrier
;
1255 old_carrier
= netif_carrier_ok(dev
) ? 1 : 0;
1258 new_carrier
= (SMC_GET_EPH_STATUS() & ES_LINK_OK
) ? 1 : 0;
1261 if (init
|| (old_carrier
!= new_carrier
)) {
1263 netif_carrier_off(dev
);
1265 netif_carrier_on(dev
);
1267 if (netif_msg_link(lp
))
1268 printk(KERN_INFO
"%s: link %s\n", dev
->name
,
1269 new_carrier
? "up" : "down");
1273 static void smc_eph_interrupt(struct net_device
*dev
)
1275 struct smc_local
*lp
= netdev_priv(dev
);
1276 void __iomem
*ioaddr
= lp
->base
;
1279 smc_10bt_check_media(dev
, 0);
1282 ctl
= SMC_GET_CTL();
1283 SMC_SET_CTL(ctl
& ~CTL_LE_ENABLE
);
1289 * This is the main routine of the driver, to handle the device when
1290 * it needs some attention.
1292 static irqreturn_t
smc_interrupt(int irq
, void *dev_id
, struct pt_regs
*regs
)
1294 struct net_device
*dev
= dev_id
;
1295 struct smc_local
*lp
= netdev_priv(dev
);
1296 void __iomem
*ioaddr
= lp
->base
;
1297 int status
, mask
, timeout
, card_stats
;
1300 DBG(3, "%s: %s\n", dev
->name
, __FUNCTION__
);
1302 spin_lock(&lp
->lock
);
1304 /* A preamble may be used when there is a potential race
1305 * between the interruptible transmit functions and this
1307 SMC_INTERRUPT_PREAMBLE
;
1309 saved_pointer
= SMC_GET_PTR();
1310 mask
= SMC_GET_INT_MASK();
1311 SMC_SET_INT_MASK(0);
1313 /* set a timeout value, so I don't stay here forever */
1314 timeout
= MAX_IRQ_LOOPS
;
1317 status
= SMC_GET_INT();
1319 DBG(2, "%s: INT 0x%02x MASK 0x%02x MEM 0x%04x FIFO 0x%04x\n",
1320 dev
->name
, status
, mask
,
1321 ({ int meminfo
; SMC_SELECT_BANK(0);
1322 meminfo
= SMC_GET_MIR();
1323 SMC_SELECT_BANK(2); meminfo
; }),
1330 if (status
& IM_TX_INT
) {
1331 /* do this before RX as it will free memory quickly */
1332 DBG(3, "%s: TX int\n", dev
->name
);
1334 SMC_ACK_INT(IM_TX_INT
);
1335 if (THROTTLE_TX_PKTS
)
1336 netif_wake_queue(dev
);
1337 } else if (status
& IM_RCV_INT
) {
1338 DBG(3, "%s: RX irq\n", dev
->name
);
1340 } else if (status
& IM_ALLOC_INT
) {
1341 DBG(3, "%s: Allocation irq\n", dev
->name
);
1342 tasklet_hi_schedule(&lp
->tx_task
);
1343 mask
&= ~IM_ALLOC_INT
;
1344 } else if (status
& IM_TX_EMPTY_INT
) {
1345 DBG(3, "%s: TX empty\n", dev
->name
);
1346 mask
&= ~IM_TX_EMPTY_INT
;
1350 card_stats
= SMC_GET_COUNTER();
1353 /* single collisions */
1354 lp
->stats
.collisions
+= card_stats
& 0xF;
1357 /* multiple collisions */
1358 lp
->stats
.collisions
+= card_stats
& 0xF;
1359 } else if (status
& IM_RX_OVRN_INT
) {
1360 DBG(1, "%s: RX overrun (EPH_ST 0x%04x)\n", dev
->name
,
1361 ({ int eph_st
; SMC_SELECT_BANK(0);
1362 eph_st
= SMC_GET_EPH_STATUS();
1363 SMC_SELECT_BANK(2); eph_st
; }) );
1364 SMC_ACK_INT(IM_RX_OVRN_INT
);
1365 lp
->stats
.rx_errors
++;
1366 lp
->stats
.rx_fifo_errors
++;
1367 } else if (status
& IM_EPH_INT
) {
1368 smc_eph_interrupt(dev
);
1369 } else if (status
& IM_MDINT
) {
1370 SMC_ACK_INT(IM_MDINT
);
1371 smc_phy_interrupt(dev
);
1372 } else if (status
& IM_ERCV_INT
) {
1373 SMC_ACK_INT(IM_ERCV_INT
);
1374 PRINTK("%s: UNSUPPORTED: ERCV INTERRUPT \n", dev
->name
);
1376 } while (--timeout
);
1378 /* restore register states */
1379 SMC_SET_PTR(saved_pointer
);
1380 SMC_SET_INT_MASK(mask
);
1381 spin_unlock(&lp
->lock
);
1383 if (timeout
== MAX_IRQ_LOOPS
)
1384 PRINTK("%s: spurious interrupt (mask = 0x%02x)\n",
1386 DBG(3, "%s: Interrupt done (%d loops)\n",
1387 dev
->name
, MAX_IRQ_LOOPS
- timeout
);
1390 * We return IRQ_HANDLED unconditionally here even if there was
1391 * nothing to do. There is a possibility that a packet might
1392 * get enqueued into the chip right after TX_EMPTY_INT is raised
1393 * but just before the CPU acknowledges the IRQ.
1394 * Better take an unneeded IRQ in some occasions than complexifying
1395 * the code for all cases.
1400 #ifdef CONFIG_NET_POLL_CONTROLLER
1402 * Polling receive - used by netconsole and other diagnostic tools
1403 * to allow network i/o with interrupts disabled.
1405 static void smc_poll_controller(struct net_device
*dev
)
1407 disable_irq(dev
->irq
);
1408 smc_interrupt(dev
->irq
, dev
, NULL
);
1409 enable_irq(dev
->irq
);
1413 /* Our watchdog timed out. Called by the networking layer */
1414 static void smc_timeout(struct net_device
*dev
)
1416 struct smc_local
*lp
= netdev_priv(dev
);
1417 void __iomem
*ioaddr
= lp
->base
;
1418 int status
, mask
, eph_st
, meminfo
, fifo
;
1420 DBG(2, "%s: %s\n", dev
->name
, __FUNCTION__
);
1422 spin_lock_irq(&lp
->lock
);
1423 status
= SMC_GET_INT();
1424 mask
= SMC_GET_INT_MASK();
1425 fifo
= SMC_GET_FIFO();
1427 eph_st
= SMC_GET_EPH_STATUS();
1428 meminfo
= SMC_GET_MIR();
1430 spin_unlock_irq(&lp
->lock
);
1431 PRINTK( "%s: TX timeout (INT 0x%02x INTMASK 0x%02x "
1432 "MEM 0x%04x FIFO 0x%04x EPH_ST 0x%04x)\n",
1433 dev
->name
, status
, mask
, meminfo
, fifo
, eph_st
);
1439 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1440 * smc_phy_configure() calls msleep() which calls schedule_timeout()
1441 * which calls schedule(). Hence we use a work queue.
1443 if (lp
->phy_type
!= 0) {
1444 if (schedule_work(&lp
->phy_configure
)) {
1445 lp
->work_pending
= 1;
1449 /* We can accept TX packets again */
1450 dev
->trans_start
= jiffies
;
1451 netif_wake_queue(dev
);
1455 * This routine will, depending on the values passed to it,
1456 * either make it accept multicast packets, go into
1457 * promiscuous mode (for TCPDUMP and cousins) or accept
1458 * a select set of multicast packets
1460 static void smc_set_multicast_list(struct net_device
*dev
)
1462 struct smc_local
*lp
= netdev_priv(dev
);
1463 void __iomem
*ioaddr
= lp
->base
;
1464 unsigned char multicast_table
[8];
1465 int update_multicast
= 0;
1467 DBG(2, "%s: %s\n", dev
->name
, __FUNCTION__
);
1469 if (dev
->flags
& IFF_PROMISC
) {
1470 DBG(2, "%s: RCR_PRMS\n", dev
->name
);
1471 lp
->rcr_cur_mode
|= RCR_PRMS
;
1474 /* BUG? I never disable promiscuous mode if multicasting was turned on.
1475 Now, I turn off promiscuous mode, but I don't do anything to multicasting
1476 when promiscuous mode is turned on.
1480 * Here, I am setting this to accept all multicast packets.
1481 * I don't need to zero the multicast table, because the flag is
1482 * checked before the table is
1484 else if (dev
->flags
& IFF_ALLMULTI
|| dev
->mc_count
> 16) {
1485 DBG(2, "%s: RCR_ALMUL\n", dev
->name
);
1486 lp
->rcr_cur_mode
|= RCR_ALMUL
;
1490 * This sets the internal hardware table to filter out unwanted
1491 * multicast packets before they take up memory.
1493 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1494 * address are the offset into the table. If that bit is 1, then the
1495 * multicast packet is accepted. Otherwise, it's dropped silently.
1497 * To use the 6 bits as an offset into the table, the high 3 bits are
1498 * the number of the 8 bit register, while the low 3 bits are the bit
1499 * within that register.
1501 else if (dev
->mc_count
) {
1503 struct dev_mc_list
*cur_addr
;
1505 /* table for flipping the order of 3 bits */
1506 static const unsigned char invert3
[] = {0, 4, 2, 6, 1, 5, 3, 7};
1508 /* start with a table of all zeros: reject all */
1509 memset(multicast_table
, 0, sizeof(multicast_table
));
1511 cur_addr
= dev
->mc_list
;
1512 for (i
= 0; i
< dev
->mc_count
; i
++, cur_addr
= cur_addr
->next
) {
1515 /* do we have a pointer here? */
1518 /* make sure this is a multicast address -
1519 shouldn't this be a given if we have it here ? */
1520 if (!(*cur_addr
->dmi_addr
& 1))
1523 /* only use the low order bits */
1524 position
= crc32_le(~0, cur_addr
->dmi_addr
, 6) & 0x3f;
1526 /* do some messy swapping to put the bit in the right spot */
1527 multicast_table
[invert3
[position
&7]] |=
1528 (1<<invert3
[(position
>>3)&7]);
1531 /* be sure I get rid of flags I might have set */
1532 lp
->rcr_cur_mode
&= ~(RCR_PRMS
| RCR_ALMUL
);
1534 /* now, the table can be loaded into the chipset */
1535 update_multicast
= 1;
1537 DBG(2, "%s: ~(RCR_PRMS|RCR_ALMUL)\n", dev
->name
);
1538 lp
->rcr_cur_mode
&= ~(RCR_PRMS
| RCR_ALMUL
);
1541 * since I'm disabling all multicast entirely, I need to
1542 * clear the multicast list
1544 memset(multicast_table
, 0, sizeof(multicast_table
));
1545 update_multicast
= 1;
1548 spin_lock_irq(&lp
->lock
);
1550 SMC_SET_RCR(lp
->rcr_cur_mode
);
1551 if (update_multicast
) {
1553 SMC_SET_MCAST(multicast_table
);
1556 spin_unlock_irq(&lp
->lock
);
1561 * Open and Initialize the board
1563 * Set up everything, reset the card, etc..
1566 smc_open(struct net_device
*dev
)
1568 struct smc_local
*lp
= netdev_priv(dev
);
1570 DBG(2, "%s: %s\n", dev
->name
, __FUNCTION__
);
1573 * Check that the address is valid. If its not, refuse
1574 * to bring the device up. The user must specify an
1575 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1577 if (!is_valid_ether_addr(dev
->dev_addr
)) {
1578 PRINTK("%s: no valid ethernet hw addr\n", __FUNCTION__
);
1582 /* Setup the default Register Modes */
1583 lp
->tcr_cur_mode
= TCR_DEFAULT
;
1584 lp
->rcr_cur_mode
= RCR_DEFAULT
;
1585 lp
->rpc_cur_mode
= RPC_DEFAULT
;
1588 * If we are not using a MII interface, we need to
1589 * monitor our own carrier signal to detect faults.
1591 if (lp
->phy_type
== 0)
1592 lp
->tcr_cur_mode
|= TCR_MON_CSN
;
1594 /* reset the hardware */
1598 /* Configure the PHY, initialize the link state */
1599 if (lp
->phy_type
!= 0)
1600 smc_phy_configure(dev
);
1602 spin_lock_irq(&lp
->lock
);
1603 smc_10bt_check_media(dev
, 1);
1604 spin_unlock_irq(&lp
->lock
);
1607 netif_start_queue(dev
);
1614 * this makes the board clean up everything that it can
1615 * and not talk to the outside world. Caused by
1616 * an 'ifconfig ethX down'
1618 static int smc_close(struct net_device
*dev
)
1620 struct smc_local
*lp
= netdev_priv(dev
);
1622 DBG(2, "%s: %s\n", dev
->name
, __FUNCTION__
);
1624 netif_stop_queue(dev
);
1625 netif_carrier_off(dev
);
1627 /* clear everything */
1629 tasklet_kill(&lp
->tx_task
);
1630 smc_phy_powerdown(dev
);
1635 * Get the current statistics.
1636 * This may be called with the card open or closed.
1638 static struct net_device_stats
*smc_query_statistics(struct net_device
*dev
)
1640 struct smc_local
*lp
= netdev_priv(dev
);
1642 DBG(2, "%s: %s\n", dev
->name
, __FUNCTION__
);
1651 smc_ethtool_getsettings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
1653 struct smc_local
*lp
= netdev_priv(dev
);
1659 if (lp
->phy_type
!= 0) {
1660 spin_lock_irq(&lp
->lock
);
1661 ret
= mii_ethtool_gset(&lp
->mii
, cmd
);
1662 spin_unlock_irq(&lp
->lock
);
1664 cmd
->supported
= SUPPORTED_10baseT_Half
|
1665 SUPPORTED_10baseT_Full
|
1666 SUPPORTED_TP
| SUPPORTED_AUI
;
1668 if (lp
->ctl_rspeed
== 10)
1669 cmd
->speed
= SPEED_10
;
1670 else if (lp
->ctl_rspeed
== 100)
1671 cmd
->speed
= SPEED_100
;
1673 cmd
->autoneg
= AUTONEG_DISABLE
;
1674 cmd
->transceiver
= XCVR_INTERNAL
;
1676 cmd
->duplex
= lp
->tcr_cur_mode
& TCR_SWFDUP
? DUPLEX_FULL
: DUPLEX_HALF
;
1685 smc_ethtool_setsettings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
1687 struct smc_local
*lp
= netdev_priv(dev
);
1690 if (lp
->phy_type
!= 0) {
1691 spin_lock_irq(&lp
->lock
);
1692 ret
= mii_ethtool_sset(&lp
->mii
, cmd
);
1693 spin_unlock_irq(&lp
->lock
);
1695 if (cmd
->autoneg
!= AUTONEG_DISABLE
||
1696 cmd
->speed
!= SPEED_10
||
1697 (cmd
->duplex
!= DUPLEX_HALF
&& cmd
->duplex
!= DUPLEX_FULL
) ||
1698 (cmd
->port
!= PORT_TP
&& cmd
->port
!= PORT_AUI
))
1701 // lp->port = cmd->port;
1702 lp
->ctl_rfduplx
= cmd
->duplex
== DUPLEX_FULL
;
1704 // if (netif_running(dev))
1705 // smc_set_port(dev);
1714 smc_ethtool_getdrvinfo(struct net_device
*dev
, struct ethtool_drvinfo
*info
)
1716 strncpy(info
->driver
, CARDNAME
, sizeof(info
->driver
));
1717 strncpy(info
->version
, version
, sizeof(info
->version
));
1718 strncpy(info
->bus_info
, dev
->class_dev
.dev
->bus_id
, sizeof(info
->bus_info
));
1721 static int smc_ethtool_nwayreset(struct net_device
*dev
)
1723 struct smc_local
*lp
= netdev_priv(dev
);
1726 if (lp
->phy_type
!= 0) {
1727 spin_lock_irq(&lp
->lock
);
1728 ret
= mii_nway_restart(&lp
->mii
);
1729 spin_unlock_irq(&lp
->lock
);
1735 static u32
smc_ethtool_getmsglevel(struct net_device
*dev
)
1737 struct smc_local
*lp
= netdev_priv(dev
);
1738 return lp
->msg_enable
;
1741 static void smc_ethtool_setmsglevel(struct net_device
*dev
, u32 level
)
1743 struct smc_local
*lp
= netdev_priv(dev
);
1744 lp
->msg_enable
= level
;
1747 static struct ethtool_ops smc_ethtool_ops
= {
1748 .get_settings
= smc_ethtool_getsettings
,
1749 .set_settings
= smc_ethtool_setsettings
,
1750 .get_drvinfo
= smc_ethtool_getdrvinfo
,
1752 .get_msglevel
= smc_ethtool_getmsglevel
,
1753 .set_msglevel
= smc_ethtool_setmsglevel
,
1754 .nway_reset
= smc_ethtool_nwayreset
,
1755 .get_link
= ethtool_op_get_link
,
1756 // .get_eeprom = smc_ethtool_geteeprom,
1757 // .set_eeprom = smc_ethtool_seteeprom,
1763 * This routine has a simple purpose -- make the SMC chip generate an
1764 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1767 * does this still work?
1769 * I just deleted auto_irq.c, since it was never built...
1772 static int __init
smc_findirq(void __iomem
*ioaddr
)
1775 unsigned long cookie
;
1777 DBG(2, "%s: %s\n", CARDNAME
, __FUNCTION__
);
1779 cookie
= probe_irq_on();
1782 * What I try to do here is trigger an ALLOC_INT. This is done
1783 * by allocating a small chunk of memory, which will give an interrupt
1786 /* enable ALLOCation interrupts ONLY */
1788 SMC_SET_INT_MASK(IM_ALLOC_INT
);
1791 * Allocate 512 bytes of memory. Note that the chip was just
1792 * reset so all the memory is available
1794 SMC_SET_MMU_CMD(MC_ALLOC
| 1);
1797 * Wait until positive that the interrupt has been generated
1802 int_status
= SMC_GET_INT();
1803 if (int_status
& IM_ALLOC_INT
)
1804 break; /* got the interrupt */
1805 } while (--timeout
);
1808 * there is really nothing that I can do here if timeout fails,
1809 * as autoirq_report will return a 0 anyway, which is what I
1810 * want in this case. Plus, the clean up is needed in both
1814 /* and disable all interrupts again */
1815 SMC_SET_INT_MASK(0);
1817 /* and return what I found */
1818 return probe_irq_off(cookie
);
1822 * Function: smc_probe(unsigned long ioaddr)
1825 * Tests to see if a given ioaddr points to an SMC91x chip.
1826 * Returns a 0 on success
1829 * (1) see if the high byte of BANK_SELECT is 0x33
1830 * (2) compare the ioaddr with the base register's address
1831 * (3) see if I recognize the chip ID in the appropriate register
1833 * Here I do typical initialization tasks.
1835 * o Initialize the structure if needed
1836 * o print out my vanity message if not done so already
1837 * o print out what type of hardware is detected
1838 * o print out the ethernet address
1840 * o set up my private data
1841 * o configure the dev structure with my subroutines
1842 * o actually GRAB the irq.
1845 static int __init
smc_probe(struct net_device
*dev
, void __iomem
*ioaddr
)
1847 struct smc_local
*lp
= netdev_priv(dev
);
1848 static int version_printed
= 0;
1850 unsigned int val
, revision_register
;
1851 const char *version_string
;
1853 DBG(2, "%s: %s\n", CARDNAME
, __FUNCTION__
);
1855 /* First, see if the high byte is 0x33 */
1856 val
= SMC_CURRENT_BANK();
1857 DBG(2, "%s: bank signature probe returned 0x%04x\n", CARDNAME
, val
);
1858 if ((val
& 0xFF00) != 0x3300) {
1859 if ((val
& 0xFF) == 0x33) {
1861 "%s: Detected possible byte-swapped interface"
1862 " at IOADDR %p\n", CARDNAME
, ioaddr
);
1869 * The above MIGHT indicate a device, but I need to write to
1870 * further test this.
1873 val
= SMC_CURRENT_BANK();
1874 if ((val
& 0xFF00) != 0x3300) {
1880 * well, we've already written once, so hopefully another
1881 * time won't hurt. This time, I need to switch the bank
1882 * register to bank 1, so I can access the base address
1886 val
= SMC_GET_BASE();
1887 val
= ((val
& 0x1F00) >> 3) << SMC_IO_SHIFT
;
1888 if (((unsigned int)ioaddr
& (0x3e0 << SMC_IO_SHIFT
)) != val
) {
1889 printk("%s: IOADDR %p doesn't match configuration (%x).\n",
1890 CARDNAME
, ioaddr
, val
);
1894 * check if the revision register is something that I
1895 * recognize. These might need to be added to later,
1896 * as future revisions could be added.
1899 revision_register
= SMC_GET_REV();
1900 DBG(2, "%s: revision = 0x%04x\n", CARDNAME
, revision_register
);
1901 version_string
= chip_ids
[ (revision_register
>> 4) & 0xF];
1902 if (!version_string
|| (revision_register
& 0xff00) != 0x3300) {
1903 /* I don't recognize this chip, so... */
1904 printk("%s: IO %p: Unrecognized revision register 0x%04x"
1905 ", Contact author.\n", CARDNAME
,
1906 ioaddr
, revision_register
);
1912 /* At this point I'll assume that the chip is an SMC91x. */
1913 if (version_printed
++ == 0)
1914 printk("%s", version
);
1916 /* fill in some of the fields */
1917 dev
->base_addr
= (unsigned long)ioaddr
;
1919 lp
->version
= revision_register
& 0xff;
1920 spin_lock_init(&lp
->lock
);
1922 /* Get the MAC address */
1924 SMC_GET_MAC_ADDR(dev
->dev_addr
);
1926 /* now, reset the chip, and put it into a known state */
1930 * If dev->irq is 0, then the device has to be banged on to see
1933 * This banging doesn't always detect the IRQ, for unknown reasons.
1934 * a workaround is to reset the chip and try again.
1936 * Interestingly, the DOS packet driver *SETS* the IRQ on the card to
1937 * be what is requested on the command line. I don't do that, mostly
1938 * because the card that I have uses a non-standard method of accessing
1939 * the IRQs, and because this _should_ work in most configurations.
1941 * Specifying an IRQ is done with the assumption that the user knows
1942 * what (s)he is doing. No checking is done!!!!
1949 dev
->irq
= smc_findirq(ioaddr
);
1952 /* kick the card and try again */
1956 if (dev
->irq
== 0) {
1957 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
1962 dev
->irq
= irq_canonicalize(dev
->irq
);
1964 /* Fill in the fields of the device structure with ethernet values. */
1967 dev
->open
= smc_open
;
1968 dev
->stop
= smc_close
;
1969 dev
->hard_start_xmit
= smc_hard_start_xmit
;
1970 dev
->tx_timeout
= smc_timeout
;
1971 dev
->watchdog_timeo
= msecs_to_jiffies(watchdog
);
1972 dev
->get_stats
= smc_query_statistics
;
1973 dev
->set_multicast_list
= smc_set_multicast_list
;
1974 dev
->ethtool_ops
= &smc_ethtool_ops
;
1975 #ifdef CONFIG_NET_POLL_CONTROLLER
1976 dev
->poll_controller
= smc_poll_controller
;
1979 tasklet_init(&lp
->tx_task
, smc_hardware_send_pkt
, (unsigned long)dev
);
1980 INIT_WORK(&lp
->phy_configure
, smc_phy_configure
, dev
);
1981 lp
->mii
.phy_id_mask
= 0x1f;
1982 lp
->mii
.reg_num_mask
= 0x1f;
1983 lp
->mii
.force_media
= 0;
1984 lp
->mii
.full_duplex
= 0;
1986 lp
->mii
.mdio_read
= smc_phy_read
;
1987 lp
->mii
.mdio_write
= smc_phy_write
;
1990 * Locate the phy, if any.
1992 if (lp
->version
>= (CHIP_91100
<< 4))
1993 smc_phy_detect(dev
);
1995 /* then shut everything down to save power */
1997 smc_phy_powerdown(dev
);
1999 /* Set default parameters */
2000 lp
->msg_enable
= NETIF_MSG_LINK
;
2001 lp
->ctl_rfduplx
= 0;
2002 lp
->ctl_rspeed
= 10;
2004 if (lp
->version
>= (CHIP_91100
<< 4)) {
2005 lp
->ctl_rfduplx
= 1;
2006 lp
->ctl_rspeed
= 100;
2010 retval
= request_irq(dev
->irq
, &smc_interrupt
, 0, dev
->name
, dev
);
2014 set_irq_type(dev
->irq
, SMC_IRQ_TRIGGER_TYPE
);
2016 #ifdef SMC_USE_PXA_DMA
2018 int dma
= pxa_request_dma(dev
->name
, DMA_PRIO_LOW
,
2019 smc_pxa_dma_irq
, NULL
);
2025 retval
= register_netdev(dev
);
2027 /* now, print out the card info, in a short format.. */
2028 printk("%s: %s (rev %d) at %p IRQ %d",
2029 dev
->name
, version_string
, revision_register
& 0x0f,
2030 lp
->base
, dev
->irq
);
2032 if (dev
->dma
!= (unsigned char)-1)
2033 printk(" DMA %d", dev
->dma
);
2035 printk("%s%s\n", nowait
? " [nowait]" : "",
2036 THROTTLE_TX_PKTS
? " [throttle_tx]" : "");
2038 if (!is_valid_ether_addr(dev
->dev_addr
)) {
2039 printk("%s: Invalid ethernet MAC address. Please "
2040 "set using ifconfig\n", dev
->name
);
2042 /* Print the Ethernet address */
2043 printk("%s: Ethernet addr: ", dev
->name
);
2044 for (i
= 0; i
< 5; i
++)
2045 printk("%2.2x:", dev
->dev_addr
[i
]);
2046 printk("%2.2x\n", dev
->dev_addr
[5]);
2049 if (lp
->phy_type
== 0) {
2050 PRINTK("%s: No PHY found\n", dev
->name
);
2051 } else if ((lp
->phy_type
& 0xfffffff0) == 0x0016f840) {
2052 PRINTK("%s: PHY LAN83C183 (LAN91C111 Internal)\n", dev
->name
);
2053 } else if ((lp
->phy_type
& 0xfffffff0) == 0x02821c50) {
2054 PRINTK("%s: PHY LAN83C180\n", dev
->name
);
2059 #ifdef SMC_USE_PXA_DMA
2060 if (retval
&& dev
->dma
!= (unsigned char)-1)
2061 pxa_free_dma(dev
->dma
);
2066 static int smc_enable_device(struct platform_device
*pdev
)
2068 unsigned long flags
;
2069 unsigned char ecor
, ecsr
;
2071 struct resource
* res
;
2073 res
= platform_get_resource_byname(pdev
, IORESOURCE_MEM
, "smc91x-attrib");
2078 * Map the attribute space. This is overkill, but clean.
2080 addr
= ioremap(res
->start
, ATTRIB_SIZE
);
2085 * Reset the device. We must disable IRQs around this
2086 * since a reset causes the IRQ line become active.
2088 local_irq_save(flags
);
2089 ecor
= readb(addr
+ (ECOR
<< SMC_IO_SHIFT
)) & ~ECOR_RESET
;
2090 writeb(ecor
| ECOR_RESET
, addr
+ (ECOR
<< SMC_IO_SHIFT
));
2091 readb(addr
+ (ECOR
<< SMC_IO_SHIFT
));
2094 * Wait 100us for the chip to reset.
2099 * The device will ignore all writes to the enable bit while
2100 * reset is asserted, even if the reset bit is cleared in the
2101 * same write. Must clear reset first, then enable the device.
2103 writeb(ecor
, addr
+ (ECOR
<< SMC_IO_SHIFT
));
2104 writeb(ecor
| ECOR_ENABLE
, addr
+ (ECOR
<< SMC_IO_SHIFT
));
2107 * Set the appropriate byte/word mode.
2109 ecsr
= readb(addr
+ (ECSR
<< SMC_IO_SHIFT
)) & ~ECSR_IOIS8
;
2110 #ifndef SMC_CAN_USE_16BIT
2113 writeb(ecsr
, addr
+ (ECSR
<< SMC_IO_SHIFT
));
2114 local_irq_restore(flags
);
2119 * Wait for the chip to wake up. We could poll the control
2120 * register in the main register space, but that isn't mapped
2121 * yet. We know this is going to take 750us.
2128 static int smc_request_attrib(struct platform_device
*pdev
)
2130 struct resource
* res
= platform_get_resource_byname(pdev
, IORESOURCE_MEM
, "smc91x-attrib");
2135 if (!request_mem_region(res
->start
, ATTRIB_SIZE
, CARDNAME
))
2141 static void smc_release_attrib(struct platform_device
*pdev
)
2143 struct resource
* res
= platform_get_resource_byname(pdev
, IORESOURCE_MEM
, "smc91x-attrib");
2146 release_mem_region(res
->start
, ATTRIB_SIZE
);
2149 #ifdef SMC_CAN_USE_DATACS
2150 static void smc_request_datacs(struct platform_device
*pdev
, struct net_device
*ndev
)
2152 struct resource
* res
= platform_get_resource_byname(pdev
, IORESOURCE_MEM
, "smc91x-data32");
2153 struct smc_local
*lp
= netdev_priv(ndev
);
2158 if(!request_mem_region(res
->start
, SMC_DATA_EXTENT
, CARDNAME
)) {
2159 printk(KERN_INFO
"%s: failed to request datacs memory region.\n", CARDNAME
);
2163 lp
->datacs
= ioremap(res
->start
, SMC_DATA_EXTENT
);
2166 static void smc_release_datacs(struct platform_device
*pdev
, struct net_device
*ndev
)
2168 struct smc_local
*lp
= netdev_priv(ndev
);
2169 struct resource
* res
= platform_get_resource_byname(pdev
, IORESOURCE_MEM
, "smc91x-data32");
2172 iounmap(lp
->datacs
);
2177 release_mem_region(res
->start
, SMC_DATA_EXTENT
);
2180 static void smc_request_datacs(struct platform_device
*pdev
, struct net_device
*ndev
) {}
2181 static void smc_release_datacs(struct platform_device
*pdev
, struct net_device
*ndev
) {}
2187 * dev->base_addr == 0, try to find all possible locations
2188 * dev->base_addr > 0x1ff, this is the address to check
2189 * dev->base_addr == <anything else>, return failure code
2192 * 0 --> there is a device
2193 * anything else, error
2195 static int smc_drv_probe(struct platform_device
*pdev
)
2197 struct net_device
*ndev
;
2198 struct resource
*res
;
2199 unsigned int __iomem
*addr
;
2202 res
= platform_get_resource_byname(pdev
, IORESOURCE_MEM
, "smc91x-regs");
2204 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
2211 if (!request_mem_region(res
->start
, SMC_IO_EXTENT
, CARDNAME
)) {
2216 ndev
= alloc_etherdev(sizeof(struct smc_local
));
2218 printk("%s: could not allocate device.\n", CARDNAME
);
2220 goto out_release_io
;
2222 SET_MODULE_OWNER(ndev
);
2223 SET_NETDEV_DEV(ndev
, &pdev
->dev
);
2225 ndev
->dma
= (unsigned char)-1;
2226 ndev
->irq
= platform_get_irq(pdev
, 0);
2228 ret
= smc_request_attrib(pdev
);
2230 goto out_free_netdev
;
2231 #if defined(CONFIG_SA1100_ASSABET)
2232 NCR_0
|= NCR_ENET_OSC_EN
;
2234 ret
= smc_enable_device(pdev
);
2236 goto out_release_attrib
;
2238 addr
= ioremap(res
->start
, SMC_IO_EXTENT
);
2241 goto out_release_attrib
;
2244 platform_set_drvdata(pdev
, ndev
);
2245 ret
= smc_probe(ndev
, addr
);
2248 #ifdef SMC_USE_PXA_DMA
2250 struct smc_local
*lp
= netdev_priv(ndev
);
2251 lp
->physaddr
= res
->start
;
2255 smc_request_datacs(pdev
, ndev
);
2260 platform_set_drvdata(pdev
, NULL
);
2263 smc_release_attrib(pdev
);
2267 release_mem_region(res
->start
, SMC_IO_EXTENT
);
2269 printk("%s: not found (%d).\n", CARDNAME
, ret
);
2274 static int smc_drv_remove(struct platform_device
*pdev
)
2276 struct net_device
*ndev
= platform_get_drvdata(pdev
);
2277 struct smc_local
*lp
= netdev_priv(ndev
);
2278 struct resource
*res
;
2280 platform_set_drvdata(pdev
, NULL
);
2282 unregister_netdev(ndev
);
2284 free_irq(ndev
->irq
, ndev
);
2286 #ifdef SMC_USE_PXA_DMA
2287 if (ndev
->dma
!= (unsigned char)-1)
2288 pxa_free_dma(ndev
->dma
);
2292 smc_release_datacs(pdev
,ndev
);
2293 smc_release_attrib(pdev
);
2295 res
= platform_get_resource_byname(pdev
, IORESOURCE_MEM
, "smc91x-regs");
2297 platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
2298 release_mem_region(res
->start
, SMC_IO_EXTENT
);
2305 static int smc_drv_suspend(struct platform_device
*dev
, pm_message_t state
)
2307 struct net_device
*ndev
= platform_get_drvdata(dev
);
2310 if (netif_running(ndev
)) {
2311 netif_device_detach(ndev
);
2313 smc_phy_powerdown(ndev
);
2319 static int smc_drv_resume(struct platform_device
*dev
)
2321 struct net_device
*ndev
= platform_get_drvdata(dev
);
2324 struct smc_local
*lp
= netdev_priv(ndev
);
2325 smc_enable_device(dev
);
2326 if (netif_running(ndev
)) {
2329 if (lp
->phy_type
!= 0)
2330 smc_phy_configure(ndev
);
2331 netif_device_attach(ndev
);
2337 static struct platform_driver smc_driver
= {
2338 .probe
= smc_drv_probe
,
2339 .remove
= smc_drv_remove
,
2340 .suspend
= smc_drv_suspend
,
2341 .resume
= smc_drv_resume
,
2347 static int __init
smc_init(void)
2353 "%s: You shouldn't use auto-probing with insmod!\n",
2358 return platform_driver_register(&smc_driver
);
2361 static void __exit
smc_cleanup(void)
2363 platform_driver_unregister(&smc_driver
);
2366 module_init(smc_init
);
2367 module_exit(smc_cleanup
);