blob: 01cc3c742c38fb85a0ccc11ca75eea1b2d758cc8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * smc91x.c
3 * This is a driver for SMSC's 91C9x/91C1xx single-chip Ethernet devices.
4 *
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
10 *
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.
15 *
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.
20 *
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
24 *
25 * Arguments:
26 * io = for the base address
27 * irq = for the IRQ
28 * nowait = 0 for normal wait states, 1 eliminates additional wait states
29 *
30 * original author:
31 * Erik Stahlman <erik@vt.edu>
32 *
33 * hardware multicast code:
34 * Peter Cammaert <pc@denkart.be>
35 *
36 * contributors:
37 * Daris A Nevil <dnevil@snmc.com>
38 * Nicolas Pitre <nico@cam.org>
39 * Russell King <rmk@arm.linux.org.uk>
40 *
41 * History:
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
51 * - ethtool support
52 * - convert to use generic MII interface
53 * - add link up/down notification
54 * - don't try to handle full negotiation in
55 * smc_phy_configure
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)
59 */
60static const char version[] =
61 "smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <nico@cam.org>\n";
62
63/* Debugging level */
64#ifndef SMC_DEBUG
65#define SMC_DEBUG 0
66#endif
67
68
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#include <linux/init.h>
70#include <linux/module.h>
71#include <linux/kernel.h>
72#include <linux/sched.h>
73#include <linux/slab.h>
74#include <linux/delay.h>
75#include <linux/interrupt.h>
76#include <linux/errno.h>
77#include <linux/ioport.h>
78#include <linux/crc32.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010079#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070080#include <linux/spinlock.h>
81#include <linux/ethtool.h>
82#include <linux/mii.h>
83#include <linux/workqueue.h>
84
85#include <linux/netdevice.h>
86#include <linux/etherdevice.h>
87#include <linux/skbuff.h>
88
89#include <asm/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91#include "smc91x.h"
92
93#ifdef CONFIG_ISA
94/*
95 * the LAN91C111 can be at any of the following port addresses. To change,
96 * for a slightly different card, you can add it to the array. Keep in
97 * mind that the array must end in zero.
98 */
99static unsigned int smc_portlist[] __initdata = {
100 0x200, 0x220, 0x240, 0x260, 0x280, 0x2A0, 0x2C0, 0x2E0,
101 0x300, 0x320, 0x340, 0x360, 0x380, 0x3A0, 0x3C0, 0x3E0, 0
102};
103
104#ifndef SMC_IOADDR
105# define SMC_IOADDR -1
106#endif
107static unsigned long io = SMC_IOADDR;
108module_param(io, ulong, 0400);
109MODULE_PARM_DESC(io, "I/O base address");
110
111#ifndef SMC_IRQ
112# define SMC_IRQ -1
113#endif
114static int irq = SMC_IRQ;
115module_param(irq, int, 0400);
116MODULE_PARM_DESC(irq, "IRQ number");
117
118#endif /* CONFIG_ISA */
119
120#ifndef SMC_NOWAIT
121# define SMC_NOWAIT 0
122#endif
123static int nowait = SMC_NOWAIT;
124module_param(nowait, int, 0400);
125MODULE_PARM_DESC(nowait, "set to 1 for no wait state");
126
127/*
128 * Transmit timeout, default 5 seconds.
129 */
Nicolas Pitreea937562005-04-12 16:26:40 -0400130static int watchdog = 1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131module_param(watchdog, int, 0400);
132MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
133
134MODULE_LICENSE("GPL");
135
136/*
137 * The internal workings of the driver. If you are changing anything
138 * here with the SMC stuff, you should have the datasheet and know
139 * what you are doing.
140 */
141#define CARDNAME "smc91x"
142
143/*
144 * Use power-down feature of the chip
145 */
146#define POWER_DOWN 1
147
148/*
149 * Wait time for memory to be free. This probably shouldn't be
150 * tuned that much, as waiting for this means nothing else happens
151 * in the system
152 */
153#define MEMORY_WAIT_TIME 16
154
155/*
Nicolas Pitre5d0571d2005-11-17 14:02:48 -0500156 * The maximum number of processing loops allowed for each call to the
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400157 * IRQ handler.
Nicolas Pitre5d0571d2005-11-17 14:02:48 -0500158 */
159#define MAX_IRQ_LOOPS 8
160
161/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 * This selects whether TX packets are sent one by one to the SMC91x internal
163 * memory and throttled until transmission completes. This may prevent
164 * RX overruns a litle by keeping much of the memory free for RX packets
165 * but to the expense of reduced TX throughput and increased IRQ overhead.
166 * Note this is not a cure for a too slow data bus or too high IRQ latency.
167 */
168#define THROTTLE_TX_PKTS 0
169
170/*
171 * The MII clock high/low times. 2x this number gives the MII clock period
172 * in microseconds. (was 50, but this gives 6.4ms for each MII transaction!)
173 */
174#define MII_DELAY 1
175
176/* store this information for the driver.. */
177struct smc_local {
178 /*
179 * If I have to wait until memory is available to send a
180 * packet, I will store the skbuff here, until I get the
181 * desired memory. Then, I'll send it out and free it.
182 */
183 struct sk_buff *pending_tx_skb;
184 struct tasklet_struct tx_task;
185
186 /*
187 * these are things that the kernel wants me to keep, so users
188 * can find out semi-useless statistics of how well the card is
189 * performing
190 */
191 struct net_device_stats stats;
192
193 /* version/revision of the SMC91x chip */
194 int version;
195
196 /* Contains the current active transmission mode */
197 int tcr_cur_mode;
198
199 /* Contains the current active receive mode */
200 int rcr_cur_mode;
201
202 /* Contains the current active receive/phy mode */
203 int rpc_cur_mode;
204 int ctl_rfduplx;
205 int ctl_rspeed;
206
207 u32 msg_enable;
208 u32 phy_type;
209 struct mii_if_info mii;
210
211 /* work queue */
212 struct work_struct phy_configure;
David Howells6d5aefb2006-12-05 19:36:26 +0000213 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 int work_pending;
215
216 spinlock_t lock;
217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218#ifdef SMC_USE_PXA_DMA
219 /* DMA needs the physical address of the chip */
220 u_long physaddr;
221#endif
222 void __iomem *base;
Nicolas Pitre09779c62006-03-20 11:54:27 -0500223 void __iomem *datacs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224};
225
226#if SMC_DEBUG > 0
227#define DBG(n, args...) \
228 do { \
229 if (SMC_DEBUG >= (n)) \
230 printk(args); \
231 } while (0)
232
233#define PRINTK(args...) printk(args)
234#else
235#define DBG(n, args...) do { } while(0)
236#define PRINTK(args...) printk(KERN_DEBUG args)
237#endif
238
239#if SMC_DEBUG > 3
240static void PRINT_PKT(u_char *buf, int length)
241{
242 int i;
243 int remainder;
244 int lines;
245
246 lines = length / 16;
247 remainder = length % 16;
248
249 for (i = 0; i < lines ; i ++) {
250 int cur;
251 for (cur = 0; cur < 8; cur++) {
252 u_char a, b;
253 a = *buf++;
254 b = *buf++;
255 printk("%02x%02x ", a, b);
256 }
257 printk("\n");
258 }
259 for (i = 0; i < remainder/2 ; i++) {
260 u_char a, b;
261 a = *buf++;
262 b = *buf++;
263 printk("%02x%02x ", a, b);
264 }
265 printk("\n");
266}
267#else
268#define PRINT_PKT(x...) do { } while(0)
269#endif
270
271
272/* this enables an interrupt in the interrupt mask register */
273#define SMC_ENABLE_INT(x) do { \
274 unsigned char mask; \
275 spin_lock_irq(&lp->lock); \
276 mask = SMC_GET_INT_MASK(); \
277 mask |= (x); \
278 SMC_SET_INT_MASK(mask); \
279 spin_unlock_irq(&lp->lock); \
280} while (0)
281
282/* this disables an interrupt from the interrupt mask register */
283#define SMC_DISABLE_INT(x) do { \
284 unsigned char mask; \
285 spin_lock_irq(&lp->lock); \
286 mask = SMC_GET_INT_MASK(); \
287 mask &= ~(x); \
288 SMC_SET_INT_MASK(mask); \
289 spin_unlock_irq(&lp->lock); \
290} while (0)
291
292/*
293 * Wait while MMU is busy. This is usually in the order of a few nanosecs
294 * if at all, but let's avoid deadlocking the system if the hardware
295 * decides to go south.
296 */
297#define SMC_WAIT_MMU_BUSY() do { \
298 if (unlikely(SMC_GET_MMU_CMD() & MC_BUSY)) { \
299 unsigned long timeout = jiffies + 2; \
300 while (SMC_GET_MMU_CMD() & MC_BUSY) { \
301 if (time_after(jiffies, timeout)) { \
302 printk("%s: timeout %s line %d\n", \
303 dev->name, __FILE__, __LINE__); \
304 break; \
305 } \
306 cpu_relax(); \
307 } \
308 } \
309} while (0)
310
311
312/*
313 * this does a soft reset on the device
314 */
315static void smc_reset(struct net_device *dev)
316{
317 struct smc_local *lp = netdev_priv(dev);
318 void __iomem *ioaddr = lp->base;
319 unsigned int ctl, cfg;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400320 struct sk_buff *pending_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
322 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
323
Nicolas Pitrebe836682005-06-19 23:56:21 -0400324 /* Disable all interrupts, block TX tasklet */
Russell King76cb4fe2006-08-14 23:00:20 -0700325 spin_lock_irq(&lp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 SMC_SELECT_BANK(2);
327 SMC_SET_INT_MASK(0);
Nicolas Pitrebe836682005-06-19 23:56:21 -0400328 pending_skb = lp->pending_tx_skb;
329 lp->pending_tx_skb = NULL;
Russell King76cb4fe2006-08-14 23:00:20 -0700330 spin_unlock_irq(&lp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
Nicolas Pitrebe836682005-06-19 23:56:21 -0400332 /* free any pending tx skb */
333 if (pending_skb) {
334 dev_kfree_skb(pending_skb);
335 lp->stats.tx_errors++;
336 lp->stats.tx_aborted_errors++;
337 }
338
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 /*
340 * This resets the registers mostly to defaults, but doesn't
341 * affect EEPROM. That seems unnecessary
342 */
343 SMC_SELECT_BANK(0);
344 SMC_SET_RCR(RCR_SOFTRST);
345
346 /*
347 * Setup the Configuration Register
348 * This is necessary because the CONFIG_REG is not affected
349 * by a soft reset
350 */
351 SMC_SELECT_BANK(1);
352
353 cfg = CONFIG_DEFAULT;
354
355 /*
356 * Setup for fast accesses if requested. If the card/system
357 * can't handle it then there will be no recovery except for
358 * a hard reset or power cycle
359 */
360 if (nowait)
361 cfg |= CONFIG_NO_WAIT;
362
363 /*
364 * Release from possible power-down state
365 * Configuration register is not affected by Soft Reset
366 */
367 cfg |= CONFIG_EPH_POWER_EN;
368
369 SMC_SET_CONFIG(cfg);
370
371 /* this should pause enough for the chip to be happy */
372 /*
373 * elaborate? What does the chip _need_? --jgarzik
374 *
375 * This seems to be undocumented, but something the original
376 * driver(s) have always done. Suspect undocumented timing
377 * info/determined empirically. --rmk
378 */
379 udelay(1);
380
381 /* Disable transmit and receive functionality */
382 SMC_SELECT_BANK(0);
383 SMC_SET_RCR(RCR_CLEAR);
384 SMC_SET_TCR(TCR_CLEAR);
385
386 SMC_SELECT_BANK(1);
387 ctl = SMC_GET_CTL() | CTL_LE_ENABLE;
388
389 /*
390 * Set the control register to automatically release successfully
391 * transmitted packets, to make the best use out of our limited
392 * memory
393 */
394 if(!THROTTLE_TX_PKTS)
395 ctl |= CTL_AUTO_RELEASE;
396 else
397 ctl &= ~CTL_AUTO_RELEASE;
398 SMC_SET_CTL(ctl);
399
400 /* Reset the MMU */
401 SMC_SELECT_BANK(2);
402 SMC_SET_MMU_CMD(MC_RESET);
403 SMC_WAIT_MMU_BUSY();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404}
405
406/*
407 * Enable Interrupts, Receive, and Transmit
408 */
409static void smc_enable(struct net_device *dev)
410{
411 struct smc_local *lp = netdev_priv(dev);
412 void __iomem *ioaddr = lp->base;
413 int mask;
414
415 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
416
417 /* see the header file for options in TCR/RCR DEFAULT */
418 SMC_SELECT_BANK(0);
419 SMC_SET_TCR(lp->tcr_cur_mode);
420 SMC_SET_RCR(lp->rcr_cur_mode);
421
422 SMC_SELECT_BANK(1);
423 SMC_SET_MAC_ADDR(dev->dev_addr);
424
425 /* now, enable interrupts */
426 mask = IM_EPH_INT|IM_RX_OVRN_INT|IM_RCV_INT;
427 if (lp->version >= (CHIP_91100 << 4))
428 mask |= IM_MDINT;
429 SMC_SELECT_BANK(2);
430 SMC_SET_INT_MASK(mask);
431
432 /*
433 * From this point the register bank must _NOT_ be switched away
434 * to something else than bank 2 without proper locking against
435 * races with any tasklet or interrupt handlers until smc_shutdown()
436 * or smc_reset() is called.
437 */
438}
439
440/*
441 * this puts the device in an inactive state
442 */
443static void smc_shutdown(struct net_device *dev)
444{
445 struct smc_local *lp = netdev_priv(dev);
446 void __iomem *ioaddr = lp->base;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400447 struct sk_buff *pending_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
449 DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__);
450
451 /* no more interrupts for me */
Russell King76cb4fe2006-08-14 23:00:20 -0700452 spin_lock_irq(&lp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 SMC_SELECT_BANK(2);
454 SMC_SET_INT_MASK(0);
Nicolas Pitrebe836682005-06-19 23:56:21 -0400455 pending_skb = lp->pending_tx_skb;
456 lp->pending_tx_skb = NULL;
Russell King76cb4fe2006-08-14 23:00:20 -0700457 spin_unlock_irq(&lp->lock);
Nicolas Pitrebe836682005-06-19 23:56:21 -0400458 if (pending_skb)
459 dev_kfree_skb(pending_skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
461 /* and tell the card to stay away from that nasty outside world */
462 SMC_SELECT_BANK(0);
463 SMC_SET_RCR(RCR_CLEAR);
464 SMC_SET_TCR(TCR_CLEAR);
465
466#ifdef POWER_DOWN
467 /* finally, shut the chip down */
468 SMC_SELECT_BANK(1);
469 SMC_SET_CONFIG(SMC_GET_CONFIG() & ~CONFIG_EPH_POWER_EN);
470#endif
471}
472
473/*
474 * This is the procedure to handle the receipt of a packet.
475 */
476static inline void smc_rcv(struct net_device *dev)
477{
478 struct smc_local *lp = netdev_priv(dev);
479 void __iomem *ioaddr = lp->base;
480 unsigned int packet_number, status, packet_len;
481
482 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
483
484 packet_number = SMC_GET_RXFIFO();
485 if (unlikely(packet_number & RXFIFO_REMPTY)) {
486 PRINTK("%s: smc_rcv with nothing on FIFO.\n", dev->name);
487 return;
488 }
489
490 /* read from start of packet */
491 SMC_SET_PTR(PTR_READ | PTR_RCV | PTR_AUTOINC);
492
493 /* First two words are status and packet length */
494 SMC_GET_PKT_HDR(status, packet_len);
495 packet_len &= 0x07ff; /* mask off top bits */
496 DBG(2, "%s: RX PNR 0x%x STATUS 0x%04x LENGTH 0x%04x (%d)\n",
497 dev->name, packet_number, status,
498 packet_len, packet_len);
499
500 back:
501 if (unlikely(packet_len < 6 || status & RS_ERRORS)) {
502 if (status & RS_TOOLONG && packet_len <= (1514 + 4 + 6)) {
503 /* accept VLAN packets */
504 status &= ~RS_TOOLONG;
505 goto back;
506 }
507 if (packet_len < 6) {
508 /* bloody hardware */
509 printk(KERN_ERR "%s: fubar (rxlen %u status %x\n",
510 dev->name, packet_len, status);
511 status |= RS_TOOSHORT;
512 }
513 SMC_WAIT_MMU_BUSY();
514 SMC_SET_MMU_CMD(MC_RELEASE);
515 lp->stats.rx_errors++;
516 if (status & RS_ALGNERR)
517 lp->stats.rx_frame_errors++;
518 if (status & (RS_TOOSHORT | RS_TOOLONG))
519 lp->stats.rx_length_errors++;
520 if (status & RS_BADCRC)
521 lp->stats.rx_crc_errors++;
522 } else {
523 struct sk_buff *skb;
524 unsigned char *data;
525 unsigned int data_len;
526
527 /* set multicast stats */
528 if (status & RS_MULTICAST)
529 lp->stats.multicast++;
530
531 /*
532 * Actual payload is packet_len - 6 (or 5 if odd byte).
533 * We want skb_reserve(2) and the final ctrl word
534 * (2 bytes, possibly containing the payload odd byte).
535 * Furthermore, we add 2 bytes to allow rounding up to
536 * multiple of 4 bytes on 32 bit buses.
537 * Hence packet_len - 6 + 2 + 2 + 2.
538 */
539 skb = dev_alloc_skb(packet_len);
540 if (unlikely(skb == NULL)) {
541 printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
542 dev->name);
543 SMC_WAIT_MMU_BUSY();
544 SMC_SET_MMU_CMD(MC_RELEASE);
545 lp->stats.rx_dropped++;
546 return;
547 }
548
549 /* Align IP header to 32 bits */
550 skb_reserve(skb, 2);
551
552 /* BUG: the LAN91C111 rev A never sets this bit. Force it. */
553 if (lp->version == 0x90)
554 status |= RS_ODDFRAME;
555
556 /*
557 * If odd length: packet_len - 5,
558 * otherwise packet_len - 6.
559 * With the trailing ctrl byte it's packet_len - 4.
560 */
561 data_len = packet_len - ((status & RS_ODDFRAME) ? 5 : 6);
562 data = skb_put(skb, data_len);
563 SMC_PULL_DATA(data, packet_len - 4);
564
565 SMC_WAIT_MMU_BUSY();
566 SMC_SET_MMU_CMD(MC_RELEASE);
567
568 PRINT_PKT(data, packet_len - 4);
569
570 dev->last_rx = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 skb->protocol = eth_type_trans(skb, dev);
572 netif_rx(skb);
573 lp->stats.rx_packets++;
574 lp->stats.rx_bytes += data_len;
575 }
576}
577
578#ifdef CONFIG_SMP
579/*
580 * On SMP we have the following problem:
581 *
582 * A = smc_hardware_send_pkt()
583 * B = smc_hard_start_xmit()
584 * C = smc_interrupt()
585 *
586 * A and B can never be executed simultaneously. However, at least on UP,
587 * it is possible (and even desirable) for C to interrupt execution of
588 * A or B in order to have better RX reliability and avoid overruns.
589 * C, just like A and B, must have exclusive access to the chip and
590 * each of them must lock against any other concurrent access.
591 * Unfortunately this is not possible to have C suspend execution of A or
592 * B taking place on another CPU. On UP this is no an issue since A and B
593 * are run from softirq context and C from hard IRQ context, and there is
594 * no other CPU where concurrent access can happen.
595 * If ever there is a way to force at least B and C to always be executed
596 * on the same CPU then we could use read/write locks to protect against
597 * any other concurrent access and C would always interrupt B. But life
598 * isn't that easy in a SMP world...
599 */
600#define smc_special_trylock(lock) \
601({ \
602 int __ret; \
603 local_irq_disable(); \
604 __ret = spin_trylock(lock); \
605 if (!__ret) \
606 local_irq_enable(); \
607 __ret; \
608})
609#define smc_special_lock(lock) spin_lock_irq(lock)
610#define smc_special_unlock(lock) spin_unlock_irq(lock)
611#else
612#define smc_special_trylock(lock) (1)
613#define smc_special_lock(lock) do { } while (0)
614#define smc_special_unlock(lock) do { } while (0)
615#endif
616
617/*
618 * This is called to actually send a packet to the chip.
619 */
620static void smc_hardware_send_pkt(unsigned long data)
621{
622 struct net_device *dev = (struct net_device *)data;
623 struct smc_local *lp = netdev_priv(dev);
624 void __iomem *ioaddr = lp->base;
625 struct sk_buff *skb;
626 unsigned int packet_no, len;
627 unsigned char *buf;
628
629 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
630
631 if (!smc_special_trylock(&lp->lock)) {
632 netif_stop_queue(dev);
633 tasklet_schedule(&lp->tx_task);
634 return;
635 }
636
637 skb = lp->pending_tx_skb;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400638 if (unlikely(!skb)) {
639 smc_special_unlock(&lp->lock);
640 return;
641 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 lp->pending_tx_skb = NULL;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400643
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 packet_no = SMC_GET_AR();
645 if (unlikely(packet_no & AR_FAILED)) {
646 printk("%s: Memory allocation failed.\n", dev->name);
647 lp->stats.tx_errors++;
648 lp->stats.tx_fifo_errors++;
649 smc_special_unlock(&lp->lock);
650 goto done;
651 }
652
653 /* point to the beginning of the packet */
654 SMC_SET_PN(packet_no);
655 SMC_SET_PTR(PTR_AUTOINC);
656
657 buf = skb->data;
658 len = skb->len;
659 DBG(2, "%s: TX PNR 0x%x LENGTH 0x%04x (%d) BUF 0x%p\n",
660 dev->name, packet_no, len, len, buf);
661 PRINT_PKT(buf, len);
662
663 /*
664 * Send the packet length (+6 for status words, length, and ctl.
665 * The card will pad to 64 bytes with zeroes if packet is too small.
666 */
667 SMC_PUT_PKT_HDR(0, len + 6);
668
669 /* send the actual data */
670 SMC_PUSH_DATA(buf, len & ~1);
671
672 /* Send final ctl word with the last byte if there is one */
673 SMC_outw(((len & 1) ? (0x2000 | buf[len-1]) : 0), ioaddr, DATA_REG);
674
675 /*
Nicolas Pitreea937562005-04-12 16:26:40 -0400676 * If THROTTLE_TX_PKTS is set, we stop the queue here. This will
677 * have the effect of having at most one packet queued for TX
678 * in the chip's memory at all time.
679 *
680 * If THROTTLE_TX_PKTS is not set then the queue is stopped only
681 * when memory allocation (MC_ALLOC) does not succeed right away.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 */
Nicolas Pitreea937562005-04-12 16:26:40 -0400683 if (THROTTLE_TX_PKTS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 netif_stop_queue(dev);
685
686 /* queue the packet for TX */
687 SMC_SET_MMU_CMD(MC_ENQUEUE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 smc_special_unlock(&lp->lock);
689
690 dev->trans_start = jiffies;
691 lp->stats.tx_packets++;
692 lp->stats.tx_bytes += len;
693
694 SMC_ENABLE_INT(IM_TX_INT | IM_TX_EMPTY_INT);
695
696done: if (!THROTTLE_TX_PKTS)
697 netif_wake_queue(dev);
698
699 dev_kfree_skb(skb);
700}
701
702/*
703 * Since I am not sure if I will have enough room in the chip's ram
704 * to store the packet, I call this routine which either sends it
705 * now, or set the card to generates an interrupt when ready
706 * for the packet.
707 */
708static int smc_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
709{
710 struct smc_local *lp = netdev_priv(dev);
711 void __iomem *ioaddr = lp->base;
712 unsigned int numPages, poll_count, status;
713
714 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
715
716 BUG_ON(lp->pending_tx_skb != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717
718 /*
719 * The MMU wants the number of pages to be the number of 256 bytes
720 * 'pages', minus 1 (since a packet can't ever have 0 pages :))
721 *
722 * The 91C111 ignores the size bits, but earlier models don't.
723 *
724 * Pkt size for allocating is data length +6 (for additional status
725 * words, length and ctl)
726 *
727 * If odd size then last byte is included in ctl word.
728 */
729 numPages = ((skb->len & ~1) + (6 - 1)) >> 8;
730 if (unlikely(numPages > 7)) {
731 printk("%s: Far too big packet error.\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 lp->stats.tx_errors++;
733 lp->stats.tx_dropped++;
734 dev_kfree_skb(skb);
735 return 0;
736 }
737
738 smc_special_lock(&lp->lock);
739
740 /* now, try to allocate the memory */
741 SMC_SET_MMU_CMD(MC_ALLOC | numPages);
742
743 /*
744 * Poll the chip for a short amount of time in case the
745 * allocation succeeds quickly.
746 */
747 poll_count = MEMORY_WAIT_TIME;
748 do {
749 status = SMC_GET_INT();
750 if (status & IM_ALLOC_INT) {
751 SMC_ACK_INT(IM_ALLOC_INT);
752 break;
753 }
754 } while (--poll_count);
755
756 smc_special_unlock(&lp->lock);
757
Nicolas Pitrebe836682005-06-19 23:56:21 -0400758 lp->pending_tx_skb = skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 if (!poll_count) {
760 /* oh well, wait until the chip finds memory later */
761 netif_stop_queue(dev);
762 DBG(2, "%s: TX memory allocation deferred.\n", dev->name);
763 SMC_ENABLE_INT(IM_ALLOC_INT);
764 } else {
765 /*
766 * Allocation succeeded: push packet to the chip's own memory
767 * immediately.
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400768 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 smc_hardware_send_pkt((unsigned long)dev);
770 }
771
772 return 0;
773}
774
775/*
776 * This handles a TX interrupt, which is only called when:
777 * - a TX error occurred, or
778 * - CTL_AUTO_RELEASE is not set and TX of a packet completed.
779 */
780static void smc_tx(struct net_device *dev)
781{
782 struct smc_local *lp = netdev_priv(dev);
783 void __iomem *ioaddr = lp->base;
784 unsigned int saved_packet, packet_no, tx_status, pkt_len;
785
786 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
787
788 /* If the TX FIFO is empty then nothing to do */
789 packet_no = SMC_GET_TXFIFO();
790 if (unlikely(packet_no & TXFIFO_TEMPTY)) {
791 PRINTK("%s: smc_tx with nothing on FIFO.\n", dev->name);
792 return;
793 }
794
795 /* select packet to read from */
796 saved_packet = SMC_GET_PN();
797 SMC_SET_PN(packet_no);
798
799 /* read the first word (status word) from this packet */
800 SMC_SET_PTR(PTR_AUTOINC | PTR_READ);
801 SMC_GET_PKT_HDR(tx_status, pkt_len);
802 DBG(2, "%s: TX STATUS 0x%04x PNR 0x%02x\n",
803 dev->name, tx_status, packet_no);
804
Nicolas Pitre8de90112005-04-12 16:21:11 -0400805 if (!(tx_status & ES_TX_SUC))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 lp->stats.tx_errors++;
Nicolas Pitre8de90112005-04-12 16:21:11 -0400807
808 if (tx_status & ES_LOSTCARR)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 lp->stats.tx_carrier_errors++;
810
Nicolas Pitre8de90112005-04-12 16:21:11 -0400811 if (tx_status & (ES_LATCOL | ES_16COL)) {
812 PRINTK("%s: %s occurred on last xmit\n", dev->name,
813 (tx_status & ES_LATCOL) ?
814 "late collision" : "too many collisions");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 lp->stats.tx_window_errors++;
816 if (!(lp->stats.tx_window_errors & 63) && net_ratelimit()) {
Nicolas Pitre8de90112005-04-12 16:21:11 -0400817 printk(KERN_INFO "%s: unexpectedly large number of "
818 "bad collisions. Please check duplex "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 "setting.\n", dev->name);
820 }
821 }
822
823 /* kill the packet */
824 SMC_WAIT_MMU_BUSY();
825 SMC_SET_MMU_CMD(MC_FREEPKT);
826
827 /* Don't restore Packet Number Reg until busy bit is cleared */
828 SMC_WAIT_MMU_BUSY();
829 SMC_SET_PN(saved_packet);
830
831 /* re-enable transmit */
832 SMC_SELECT_BANK(0);
833 SMC_SET_TCR(lp->tcr_cur_mode);
834 SMC_SELECT_BANK(2);
835}
836
837
838/*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
839
840static void smc_mii_out(struct net_device *dev, unsigned int val, int bits)
841{
842 struct smc_local *lp = netdev_priv(dev);
843 void __iomem *ioaddr = lp->base;
844 unsigned int mii_reg, mask;
845
846 mii_reg = SMC_GET_MII() & ~(MII_MCLK | MII_MDOE | MII_MDO);
847 mii_reg |= MII_MDOE;
848
849 for (mask = 1 << (bits - 1); mask; mask >>= 1) {
850 if (val & mask)
851 mii_reg |= MII_MDO;
852 else
853 mii_reg &= ~MII_MDO;
854
855 SMC_SET_MII(mii_reg);
856 udelay(MII_DELAY);
857 SMC_SET_MII(mii_reg | MII_MCLK);
858 udelay(MII_DELAY);
859 }
860}
861
862static unsigned int smc_mii_in(struct net_device *dev, int bits)
863{
864 struct smc_local *lp = netdev_priv(dev);
865 void __iomem *ioaddr = lp->base;
866 unsigned int mii_reg, mask, val;
867
868 mii_reg = SMC_GET_MII() & ~(MII_MCLK | MII_MDOE | MII_MDO);
869 SMC_SET_MII(mii_reg);
870
871 for (mask = 1 << (bits - 1), val = 0; mask; mask >>= 1) {
872 if (SMC_GET_MII() & MII_MDI)
873 val |= mask;
874
875 SMC_SET_MII(mii_reg);
876 udelay(MII_DELAY);
877 SMC_SET_MII(mii_reg | MII_MCLK);
878 udelay(MII_DELAY);
879 }
880
881 return val;
882}
883
884/*
885 * Reads a register from the MII Management serial interface
886 */
887static int smc_phy_read(struct net_device *dev, int phyaddr, int phyreg)
888{
889 struct smc_local *lp = netdev_priv(dev);
890 void __iomem *ioaddr = lp->base;
891 unsigned int phydata;
892
893 SMC_SELECT_BANK(3);
894
895 /* Idle - 32 ones */
896 smc_mii_out(dev, 0xffffffff, 32);
897
898 /* Start code (01) + read (10) + phyaddr + phyreg */
899 smc_mii_out(dev, 6 << 10 | phyaddr << 5 | phyreg, 14);
900
901 /* Turnaround (2bits) + phydata */
902 phydata = smc_mii_in(dev, 18);
903
904 /* Return to idle state */
905 SMC_SET_MII(SMC_GET_MII() & ~(MII_MCLK|MII_MDOE|MII_MDO));
906
907 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
908 __FUNCTION__, phyaddr, phyreg, phydata);
909
910 SMC_SELECT_BANK(2);
911 return phydata;
912}
913
914/*
915 * Writes a register to the MII Management serial interface
916 */
917static void smc_phy_write(struct net_device *dev, int phyaddr, int phyreg,
918 int phydata)
919{
920 struct smc_local *lp = netdev_priv(dev);
921 void __iomem *ioaddr = lp->base;
922
923 SMC_SELECT_BANK(3);
924
925 /* Idle - 32 ones */
926 smc_mii_out(dev, 0xffffffff, 32);
927
928 /* Start code (01) + write (01) + phyaddr + phyreg + turnaround + phydata */
929 smc_mii_out(dev, 5 << 28 | phyaddr << 23 | phyreg << 18 | 2 << 16 | phydata, 32);
930
931 /* Return to idle state */
932 SMC_SET_MII(SMC_GET_MII() & ~(MII_MCLK|MII_MDOE|MII_MDO));
933
934 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
935 __FUNCTION__, phyaddr, phyreg, phydata);
936
937 SMC_SELECT_BANK(2);
938}
939
940/*
941 * Finds and reports the PHY address
942 */
943static void smc_phy_detect(struct net_device *dev)
944{
945 struct smc_local *lp = netdev_priv(dev);
946 int phyaddr;
947
948 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
949
950 lp->phy_type = 0;
951
952 /*
953 * Scan all 32 PHY addresses if necessary, starting at
954 * PHY#1 to PHY#31, and then PHY#0 last.
955 */
956 for (phyaddr = 1; phyaddr < 33; ++phyaddr) {
957 unsigned int id1, id2;
958
959 /* Read the PHY identifiers */
960 id1 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID1);
961 id2 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID2);
962
963 DBG(3, "%s: phy_id1=0x%x, phy_id2=0x%x\n",
964 dev->name, id1, id2);
965
966 /* Make sure it is a valid identifier */
967 if (id1 != 0x0000 && id1 != 0xffff && id1 != 0x8000 &&
968 id2 != 0x0000 && id2 != 0xffff && id2 != 0x8000) {
969 /* Save the PHY's address */
970 lp->mii.phy_id = phyaddr & 31;
971 lp->phy_type = id1 << 16 | id2;
972 break;
973 }
974 }
975}
976
977/*
978 * Sets the PHY to a configuration as determined by the user
979 */
980static int smc_phy_fixed(struct net_device *dev)
981{
982 struct smc_local *lp = netdev_priv(dev);
983 void __iomem *ioaddr = lp->base;
984 int phyaddr = lp->mii.phy_id;
985 int bmcr, cfg1;
986
987 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
988
989 /* Enter Link Disable state */
990 cfg1 = smc_phy_read(dev, phyaddr, PHY_CFG1_REG);
991 cfg1 |= PHY_CFG1_LNKDIS;
992 smc_phy_write(dev, phyaddr, PHY_CFG1_REG, cfg1);
993
994 /*
995 * Set our fixed capabilities
996 * Disable auto-negotiation
997 */
998 bmcr = 0;
999
1000 if (lp->ctl_rfduplx)
1001 bmcr |= BMCR_FULLDPLX;
1002
1003 if (lp->ctl_rspeed == 100)
1004 bmcr |= BMCR_SPEED100;
1005
1006 /* Write our capabilities to the phy control register */
1007 smc_phy_write(dev, phyaddr, MII_BMCR, bmcr);
1008
1009 /* Re-Configure the Receive/Phy Control register */
1010 SMC_SELECT_BANK(0);
1011 SMC_SET_RPC(lp->rpc_cur_mode);
1012 SMC_SELECT_BANK(2);
1013
1014 return 1;
1015}
1016
1017/*
1018 * smc_phy_reset - reset the phy
1019 * @dev: net device
1020 * @phy: phy address
1021 *
1022 * Issue a software reset for the specified PHY and
1023 * wait up to 100ms for the reset to complete. We should
1024 * not access the PHY for 50ms after issuing the reset.
1025 *
1026 * The time to wait appears to be dependent on the PHY.
1027 *
1028 * Must be called with lp->lock locked.
1029 */
1030static int smc_phy_reset(struct net_device *dev, int phy)
1031{
1032 struct smc_local *lp = netdev_priv(dev);
1033 unsigned int bmcr;
1034 int timeout;
1035
1036 smc_phy_write(dev, phy, MII_BMCR, BMCR_RESET);
1037
1038 for (timeout = 2; timeout; timeout--) {
1039 spin_unlock_irq(&lp->lock);
1040 msleep(50);
1041 spin_lock_irq(&lp->lock);
1042
1043 bmcr = smc_phy_read(dev, phy, MII_BMCR);
1044 if (!(bmcr & BMCR_RESET))
1045 break;
1046 }
1047
1048 return bmcr & BMCR_RESET;
1049}
1050
1051/*
1052 * smc_phy_powerdown - powerdown phy
1053 * @dev: net device
1054 *
1055 * Power down the specified PHY
1056 */
1057static void smc_phy_powerdown(struct net_device *dev)
1058{
1059 struct smc_local *lp = netdev_priv(dev);
1060 unsigned int bmcr;
1061 int phy = lp->mii.phy_id;
1062
1063 if (lp->phy_type == 0)
1064 return;
1065
1066 /* We need to ensure that no calls to smc_phy_configure are
1067 pending.
1068
1069 flush_scheduled_work() cannot be called because we are
1070 running with the netlink semaphore held (from
1071 devinet_ioctl()) and the pending work queue contains
1072 linkwatch_event() (scheduled by netif_carrier_off()
1073 above). linkwatch_event() also wants the netlink semaphore.
1074 */
1075 while(lp->work_pending)
Nicolas Pitrebe836682005-06-19 23:56:21 -04001076 yield();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077
1078 bmcr = smc_phy_read(dev, phy, MII_BMCR);
1079 smc_phy_write(dev, phy, MII_BMCR, bmcr | BMCR_PDOWN);
1080}
1081
1082/*
1083 * smc_phy_check_media - check the media status and adjust TCR
1084 * @dev: net device
1085 * @init: set true for initialisation
1086 *
1087 * Select duplex mode depending on negotiation state. This
1088 * also updates our carrier state.
1089 */
1090static void smc_phy_check_media(struct net_device *dev, int init)
1091{
1092 struct smc_local *lp = netdev_priv(dev);
1093 void __iomem *ioaddr = lp->base;
1094
1095 if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
1096 /* duplex state has changed */
1097 if (lp->mii.full_duplex) {
1098 lp->tcr_cur_mode |= TCR_SWFDUP;
1099 } else {
1100 lp->tcr_cur_mode &= ~TCR_SWFDUP;
1101 }
1102
1103 SMC_SELECT_BANK(0);
1104 SMC_SET_TCR(lp->tcr_cur_mode);
1105 }
1106}
1107
1108/*
1109 * Configures the specified PHY through the MII management interface
1110 * using Autonegotiation.
1111 * Calls smc_phy_fixed() if the user has requested a certain config.
1112 * If RPC ANEG bit is set, the media selection is dependent purely on
1113 * the selection by the MII (either in the MII BMCR reg or the result
1114 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
1115 * is controlled by the RPC SPEED and RPC DPLX bits.
1116 */
David Howells6d5aefb2006-12-05 19:36:26 +00001117static void smc_phy_configure(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118{
David Howells6d5aefb2006-12-05 19:36:26 +00001119 struct smc_local *lp =
1120 container_of(work, struct smc_local, phy_configure);
1121 struct net_device *dev = lp->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 void __iomem *ioaddr = lp->base;
1123 int phyaddr = lp->mii.phy_id;
1124 int my_phy_caps; /* My PHY capabilities */
1125 int my_ad_caps; /* My Advertised capabilities */
1126 int status;
1127
1128 DBG(3, "%s:smc_program_phy()\n", dev->name);
1129
1130 spin_lock_irq(&lp->lock);
1131
1132 /*
1133 * We should not be called if phy_type is zero.
1134 */
1135 if (lp->phy_type == 0)
1136 goto smc_phy_configure_exit;
1137
1138 if (smc_phy_reset(dev, phyaddr)) {
1139 printk("%s: PHY reset timed out\n", dev->name);
1140 goto smc_phy_configure_exit;
1141 }
1142
1143 /*
1144 * Enable PHY Interrupts (for register 18)
1145 * Interrupts listed here are disabled
1146 */
1147 smc_phy_write(dev, phyaddr, PHY_MASK_REG,
1148 PHY_INT_LOSSSYNC | PHY_INT_CWRD | PHY_INT_SSD |
1149 PHY_INT_ESD | PHY_INT_RPOL | PHY_INT_JAB |
1150 PHY_INT_SPDDET | PHY_INT_DPLXDET);
1151
1152 /* Configure the Receive/Phy Control register */
1153 SMC_SELECT_BANK(0);
1154 SMC_SET_RPC(lp->rpc_cur_mode);
1155
1156 /* If the user requested no auto neg, then go set his request */
1157 if (lp->mii.force_media) {
1158 smc_phy_fixed(dev);
1159 goto smc_phy_configure_exit;
1160 }
1161
1162 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
1163 my_phy_caps = smc_phy_read(dev, phyaddr, MII_BMSR);
1164
1165 if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
1166 printk(KERN_INFO "Auto negotiation NOT supported\n");
1167 smc_phy_fixed(dev);
1168 goto smc_phy_configure_exit;
1169 }
1170
1171 my_ad_caps = ADVERTISE_CSMA; /* I am CSMA capable */
1172
1173 if (my_phy_caps & BMSR_100BASE4)
1174 my_ad_caps |= ADVERTISE_100BASE4;
1175 if (my_phy_caps & BMSR_100FULL)
1176 my_ad_caps |= ADVERTISE_100FULL;
1177 if (my_phy_caps & BMSR_100HALF)
1178 my_ad_caps |= ADVERTISE_100HALF;
1179 if (my_phy_caps & BMSR_10FULL)
1180 my_ad_caps |= ADVERTISE_10FULL;
1181 if (my_phy_caps & BMSR_10HALF)
1182 my_ad_caps |= ADVERTISE_10HALF;
1183
1184 /* Disable capabilities not selected by our user */
1185 if (lp->ctl_rspeed != 100)
1186 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
1187
1188 if (!lp->ctl_rfduplx)
1189 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
1190
1191 /* Update our Auto-Neg Advertisement Register */
1192 smc_phy_write(dev, phyaddr, MII_ADVERTISE, my_ad_caps);
1193 lp->mii.advertising = my_ad_caps;
1194
1195 /*
1196 * Read the register back. Without this, it appears that when
1197 * auto-negotiation is restarted, sometimes it isn't ready and
1198 * the link does not come up.
1199 */
1200 status = smc_phy_read(dev, phyaddr, MII_ADVERTISE);
1201
1202 DBG(2, "%s: phy caps=%x\n", dev->name, my_phy_caps);
1203 DBG(2, "%s: phy advertised caps=%x\n", dev->name, my_ad_caps);
1204
1205 /* Restart auto-negotiation process in order to advertise my caps */
1206 smc_phy_write(dev, phyaddr, MII_BMCR, BMCR_ANENABLE | BMCR_ANRESTART);
1207
1208 smc_phy_check_media(dev, 1);
1209
1210smc_phy_configure_exit:
Russell Kinge5254242005-11-18 12:57:55 -05001211 SMC_SELECT_BANK(2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 spin_unlock_irq(&lp->lock);
1213 lp->work_pending = 0;
1214}
1215
1216/*
1217 * smc_phy_interrupt
1218 *
1219 * Purpose: Handle interrupts relating to PHY register 18. This is
1220 * called from the "hard" interrupt handler under our private spinlock.
1221 */
1222static void smc_phy_interrupt(struct net_device *dev)
1223{
1224 struct smc_local *lp = netdev_priv(dev);
1225 int phyaddr = lp->mii.phy_id;
1226 int phy18;
1227
1228 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1229
1230 if (lp->phy_type == 0)
1231 return;
1232
1233 for(;;) {
1234 smc_phy_check_media(dev, 0);
1235
1236 /* Read PHY Register 18, Status Output */
1237 phy18 = smc_phy_read(dev, phyaddr, PHY_INT_REG);
1238 if ((phy18 & PHY_INT_INT) == 0)
1239 break;
1240 }
1241}
1242
1243/*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1244
1245static void smc_10bt_check_media(struct net_device *dev, int init)
1246{
1247 struct smc_local *lp = netdev_priv(dev);
1248 void __iomem *ioaddr = lp->base;
1249 unsigned int old_carrier, new_carrier;
1250
1251 old_carrier = netif_carrier_ok(dev) ? 1 : 0;
1252
1253 SMC_SELECT_BANK(0);
Nicolas Pitre8de90112005-04-12 16:21:11 -04001254 new_carrier = (SMC_GET_EPH_STATUS() & ES_LINK_OK) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 SMC_SELECT_BANK(2);
1256
1257 if (init || (old_carrier != new_carrier)) {
1258 if (!new_carrier) {
1259 netif_carrier_off(dev);
1260 } else {
1261 netif_carrier_on(dev);
1262 }
1263 if (netif_msg_link(lp))
1264 printk(KERN_INFO "%s: link %s\n", dev->name,
1265 new_carrier ? "up" : "down");
1266 }
1267}
1268
1269static void smc_eph_interrupt(struct net_device *dev)
1270{
1271 struct smc_local *lp = netdev_priv(dev);
1272 void __iomem *ioaddr = lp->base;
1273 unsigned int ctl;
1274
1275 smc_10bt_check_media(dev, 0);
1276
1277 SMC_SELECT_BANK(1);
1278 ctl = SMC_GET_CTL();
1279 SMC_SET_CTL(ctl & ~CTL_LE_ENABLE);
1280 SMC_SET_CTL(ctl);
1281 SMC_SELECT_BANK(2);
1282}
1283
1284/*
1285 * This is the main routine of the driver, to handle the device when
1286 * it needs some attention.
1287 */
David Howells7d12e782006-10-05 14:55:46 +01001288static irqreturn_t smc_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289{
1290 struct net_device *dev = dev_id;
1291 struct smc_local *lp = netdev_priv(dev);
1292 void __iomem *ioaddr = lp->base;
1293 int status, mask, timeout, card_stats;
1294 int saved_pointer;
1295
1296 DBG(3, "%s: %s\n", dev->name, __FUNCTION__);
1297
1298 spin_lock(&lp->lock);
1299
1300 /* A preamble may be used when there is a potential race
1301 * between the interruptible transmit functions and this
1302 * ISR. */
1303 SMC_INTERRUPT_PREAMBLE;
1304
1305 saved_pointer = SMC_GET_PTR();
1306 mask = SMC_GET_INT_MASK();
1307 SMC_SET_INT_MASK(0);
1308
1309 /* set a timeout value, so I don't stay here forever */
Nicolas Pitre5d0571d2005-11-17 14:02:48 -05001310 timeout = MAX_IRQ_LOOPS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311
1312 do {
1313 status = SMC_GET_INT();
1314
1315 DBG(2, "%s: INT 0x%02x MASK 0x%02x MEM 0x%04x FIFO 0x%04x\n",
1316 dev->name, status, mask,
1317 ({ int meminfo; SMC_SELECT_BANK(0);
1318 meminfo = SMC_GET_MIR();
1319 SMC_SELECT_BANK(2); meminfo; }),
1320 SMC_GET_FIFO());
1321
1322 status &= mask;
1323 if (!status)
1324 break;
1325
Nicolas Pitreea937562005-04-12 16:26:40 -04001326 if (status & IM_TX_INT) {
1327 /* do this before RX as it will free memory quickly */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 DBG(3, "%s: TX int\n", dev->name);
1329 smc_tx(dev);
1330 SMC_ACK_INT(IM_TX_INT);
1331 if (THROTTLE_TX_PKTS)
1332 netif_wake_queue(dev);
Nicolas Pitreea937562005-04-12 16:26:40 -04001333 } else if (status & IM_RCV_INT) {
1334 DBG(3, "%s: RX irq\n", dev->name);
1335 smc_rcv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336 } else if (status & IM_ALLOC_INT) {
1337 DBG(3, "%s: Allocation irq\n", dev->name);
1338 tasklet_hi_schedule(&lp->tx_task);
1339 mask &= ~IM_ALLOC_INT;
1340 } else if (status & IM_TX_EMPTY_INT) {
1341 DBG(3, "%s: TX empty\n", dev->name);
1342 mask &= ~IM_TX_EMPTY_INT;
1343
1344 /* update stats */
1345 SMC_SELECT_BANK(0);
1346 card_stats = SMC_GET_COUNTER();
1347 SMC_SELECT_BANK(2);
1348
1349 /* single collisions */
1350 lp->stats.collisions += card_stats & 0xF;
1351 card_stats >>= 4;
1352
1353 /* multiple collisions */
1354 lp->stats.collisions += card_stats & 0xF;
1355 } else if (status & IM_RX_OVRN_INT) {
Nicolas Pitre8de90112005-04-12 16:21:11 -04001356 DBG(1, "%s: RX overrun (EPH_ST 0x%04x)\n", dev->name,
1357 ({ int eph_st; SMC_SELECT_BANK(0);
1358 eph_st = SMC_GET_EPH_STATUS();
1359 SMC_SELECT_BANK(2); eph_st; }) );
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 SMC_ACK_INT(IM_RX_OVRN_INT);
1361 lp->stats.rx_errors++;
1362 lp->stats.rx_fifo_errors++;
1363 } else if (status & IM_EPH_INT) {
1364 smc_eph_interrupt(dev);
1365 } else if (status & IM_MDINT) {
1366 SMC_ACK_INT(IM_MDINT);
1367 smc_phy_interrupt(dev);
1368 } else if (status & IM_ERCV_INT) {
1369 SMC_ACK_INT(IM_ERCV_INT);
1370 PRINTK("%s: UNSUPPORTED: ERCV INTERRUPT \n", dev->name);
1371 }
1372 } while (--timeout);
1373
1374 /* restore register states */
1375 SMC_SET_PTR(saved_pointer);
1376 SMC_SET_INT_MASK(mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 spin_unlock(&lp->lock);
1378
Nicolas Pitre5d0571d2005-11-17 14:02:48 -05001379 if (timeout == MAX_IRQ_LOOPS)
1380 PRINTK("%s: spurious interrupt (mask = 0x%02x)\n",
1381 dev->name, mask);
1382 DBG(3, "%s: Interrupt done (%d loops)\n",
1383 dev->name, MAX_IRQ_LOOPS - timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384
1385 /*
1386 * We return IRQ_HANDLED unconditionally here even if there was
1387 * nothing to do. There is a possibility that a packet might
1388 * get enqueued into the chip right after TX_EMPTY_INT is raised
1389 * but just before the CPU acknowledges the IRQ.
1390 * Better take an unneeded IRQ in some occasions than complexifying
1391 * the code for all cases.
1392 */
1393 return IRQ_HANDLED;
1394}
1395
1396#ifdef CONFIG_NET_POLL_CONTROLLER
1397/*
1398 * Polling receive - used by netconsole and other diagnostic tools
1399 * to allow network i/o with interrupts disabled.
1400 */
1401static void smc_poll_controller(struct net_device *dev)
1402{
1403 disable_irq(dev->irq);
Al Viro9c8e7f52006-10-07 16:29:18 +01001404 smc_interrupt(dev->irq, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 enable_irq(dev->irq);
1406}
1407#endif
1408
1409/* Our watchdog timed out. Called by the networking layer */
1410static void smc_timeout(struct net_device *dev)
1411{
1412 struct smc_local *lp = netdev_priv(dev);
1413 void __iomem *ioaddr = lp->base;
Nicolas Pitre8de90112005-04-12 16:21:11 -04001414 int status, mask, eph_st, meminfo, fifo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415
1416 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1417
1418 spin_lock_irq(&lp->lock);
1419 status = SMC_GET_INT();
1420 mask = SMC_GET_INT_MASK();
1421 fifo = SMC_GET_FIFO();
1422 SMC_SELECT_BANK(0);
Nicolas Pitre8de90112005-04-12 16:21:11 -04001423 eph_st = SMC_GET_EPH_STATUS();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 meminfo = SMC_GET_MIR();
1425 SMC_SELECT_BANK(2);
1426 spin_unlock_irq(&lp->lock);
Nicolas Pitre8de90112005-04-12 16:21:11 -04001427 PRINTK( "%s: TX timeout (INT 0x%02x INTMASK 0x%02x "
1428 "MEM 0x%04x FIFO 0x%04x EPH_ST 0x%04x)\n",
1429 dev->name, status, mask, meminfo, fifo, eph_st );
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430
1431 smc_reset(dev);
1432 smc_enable(dev);
1433
1434 /*
1435 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1436 * smc_phy_configure() calls msleep() which calls schedule_timeout()
1437 * which calls schedule(). Hence we use a work queue.
1438 */
1439 if (lp->phy_type != 0) {
1440 if (schedule_work(&lp->phy_configure)) {
1441 lp->work_pending = 1;
1442 }
1443 }
1444
1445 /* We can accept TX packets again */
1446 dev->trans_start = jiffies;
1447 netif_wake_queue(dev);
1448}
1449
1450/*
1451 * This routine will, depending on the values passed to it,
1452 * either make it accept multicast packets, go into
1453 * promiscuous mode (for TCPDUMP and cousins) or accept
1454 * a select set of multicast packets
1455 */
1456static void smc_set_multicast_list(struct net_device *dev)
1457{
1458 struct smc_local *lp = netdev_priv(dev);
1459 void __iomem *ioaddr = lp->base;
1460 unsigned char multicast_table[8];
1461 int update_multicast = 0;
1462
1463 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1464
1465 if (dev->flags & IFF_PROMISC) {
1466 DBG(2, "%s: RCR_PRMS\n", dev->name);
1467 lp->rcr_cur_mode |= RCR_PRMS;
1468 }
1469
1470/* BUG? I never disable promiscuous mode if multicasting was turned on.
1471 Now, I turn off promiscuous mode, but I don't do anything to multicasting
1472 when promiscuous mode is turned on.
1473*/
1474
1475 /*
1476 * Here, I am setting this to accept all multicast packets.
1477 * I don't need to zero the multicast table, because the flag is
1478 * checked before the table is
1479 */
1480 else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) {
1481 DBG(2, "%s: RCR_ALMUL\n", dev->name);
1482 lp->rcr_cur_mode |= RCR_ALMUL;
1483 }
1484
1485 /*
1486 * This sets the internal hardware table to filter out unwanted
1487 * multicast packets before they take up memory.
1488 *
1489 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1490 * address are the offset into the table. If that bit is 1, then the
1491 * multicast packet is accepted. Otherwise, it's dropped silently.
1492 *
1493 * To use the 6 bits as an offset into the table, the high 3 bits are
1494 * the number of the 8 bit register, while the low 3 bits are the bit
1495 * within that register.
1496 */
1497 else if (dev->mc_count) {
1498 int i;
1499 struct dev_mc_list *cur_addr;
1500
1501 /* table for flipping the order of 3 bits */
1502 static const unsigned char invert3[] = {0, 4, 2, 6, 1, 5, 3, 7};
1503
1504 /* start with a table of all zeros: reject all */
1505 memset(multicast_table, 0, sizeof(multicast_table));
1506
1507 cur_addr = dev->mc_list;
1508 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
1509 int position;
1510
1511 /* do we have a pointer here? */
1512 if (!cur_addr)
1513 break;
1514 /* make sure this is a multicast address -
1515 shouldn't this be a given if we have it here ? */
1516 if (!(*cur_addr->dmi_addr & 1))
1517 continue;
1518
1519 /* only use the low order bits */
1520 position = crc32_le(~0, cur_addr->dmi_addr, 6) & 0x3f;
1521
1522 /* do some messy swapping to put the bit in the right spot */
1523 multicast_table[invert3[position&7]] |=
1524 (1<<invert3[(position>>3)&7]);
1525 }
1526
1527 /* be sure I get rid of flags I might have set */
1528 lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL);
1529
1530 /* now, the table can be loaded into the chipset */
1531 update_multicast = 1;
1532 } else {
1533 DBG(2, "%s: ~(RCR_PRMS|RCR_ALMUL)\n", dev->name);
1534 lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL);
1535
1536 /*
1537 * since I'm disabling all multicast entirely, I need to
1538 * clear the multicast list
1539 */
1540 memset(multicast_table, 0, sizeof(multicast_table));
1541 update_multicast = 1;
1542 }
1543
1544 spin_lock_irq(&lp->lock);
1545 SMC_SELECT_BANK(0);
1546 SMC_SET_RCR(lp->rcr_cur_mode);
1547 if (update_multicast) {
1548 SMC_SELECT_BANK(3);
1549 SMC_SET_MCAST(multicast_table);
1550 }
1551 SMC_SELECT_BANK(2);
1552 spin_unlock_irq(&lp->lock);
1553}
1554
1555
1556/*
1557 * Open and Initialize the board
1558 *
1559 * Set up everything, reset the card, etc..
1560 */
1561static int
1562smc_open(struct net_device *dev)
1563{
1564 struct smc_local *lp = netdev_priv(dev);
1565
1566 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1567
1568 /*
1569 * Check that the address is valid. If its not, refuse
1570 * to bring the device up. The user must specify an
1571 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1572 */
1573 if (!is_valid_ether_addr(dev->dev_addr)) {
1574 PRINTK("%s: no valid ethernet hw addr\n", __FUNCTION__);
1575 return -EINVAL;
1576 }
1577
1578 /* Setup the default Register Modes */
1579 lp->tcr_cur_mode = TCR_DEFAULT;
1580 lp->rcr_cur_mode = RCR_DEFAULT;
1581 lp->rpc_cur_mode = RPC_DEFAULT;
1582
1583 /*
1584 * If we are not using a MII interface, we need to
1585 * monitor our own carrier signal to detect faults.
1586 */
1587 if (lp->phy_type == 0)
1588 lp->tcr_cur_mode |= TCR_MON_CSN;
1589
1590 /* reset the hardware */
1591 smc_reset(dev);
1592 smc_enable(dev);
1593
1594 /* Configure the PHY, initialize the link state */
1595 if (lp->phy_type != 0)
David Howells6d5aefb2006-12-05 19:36:26 +00001596 smc_phy_configure(&lp->phy_configure);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597 else {
1598 spin_lock_irq(&lp->lock);
1599 smc_10bt_check_media(dev, 1);
1600 spin_unlock_irq(&lp->lock);
1601 }
1602
1603 netif_start_queue(dev);
1604 return 0;
1605}
1606
1607/*
1608 * smc_close
1609 *
1610 * this makes the board clean up everything that it can
1611 * and not talk to the outside world. Caused by
1612 * an 'ifconfig ethX down'
1613 */
1614static int smc_close(struct net_device *dev)
1615{
1616 struct smc_local *lp = netdev_priv(dev);
1617
1618 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1619
1620 netif_stop_queue(dev);
1621 netif_carrier_off(dev);
1622
1623 /* clear everything */
1624 smc_shutdown(dev);
Nicolas Pitrebe836682005-06-19 23:56:21 -04001625 tasklet_kill(&lp->tx_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626 smc_phy_powerdown(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 return 0;
1628}
1629
1630/*
1631 * Get the current statistics.
1632 * This may be called with the card open or closed.
1633 */
1634static struct net_device_stats *smc_query_statistics(struct net_device *dev)
1635{
1636 struct smc_local *lp = netdev_priv(dev);
1637
1638 DBG(2, "%s: %s\n", dev->name, __FUNCTION__);
1639
1640 return &lp->stats;
1641}
1642
1643/*
1644 * Ethtool support
1645 */
1646static int
1647smc_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1648{
1649 struct smc_local *lp = netdev_priv(dev);
1650 int ret;
1651
1652 cmd->maxtxpkt = 1;
1653 cmd->maxrxpkt = 1;
1654
1655 if (lp->phy_type != 0) {
1656 spin_lock_irq(&lp->lock);
1657 ret = mii_ethtool_gset(&lp->mii, cmd);
1658 spin_unlock_irq(&lp->lock);
1659 } else {
1660 cmd->supported = SUPPORTED_10baseT_Half |
1661 SUPPORTED_10baseT_Full |
1662 SUPPORTED_TP | SUPPORTED_AUI;
1663
1664 if (lp->ctl_rspeed == 10)
1665 cmd->speed = SPEED_10;
1666 else if (lp->ctl_rspeed == 100)
1667 cmd->speed = SPEED_100;
1668
1669 cmd->autoneg = AUTONEG_DISABLE;
1670 cmd->transceiver = XCVR_INTERNAL;
1671 cmd->port = 0;
1672 cmd->duplex = lp->tcr_cur_mode & TCR_SWFDUP ? DUPLEX_FULL : DUPLEX_HALF;
1673
1674 ret = 0;
1675 }
1676
1677 return ret;
1678}
1679
1680static int
1681smc_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1682{
1683 struct smc_local *lp = netdev_priv(dev);
1684 int ret;
1685
1686 if (lp->phy_type != 0) {
1687 spin_lock_irq(&lp->lock);
1688 ret = mii_ethtool_sset(&lp->mii, cmd);
1689 spin_unlock_irq(&lp->lock);
1690 } else {
1691 if (cmd->autoneg != AUTONEG_DISABLE ||
1692 cmd->speed != SPEED_10 ||
1693 (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1694 (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1695 return -EINVAL;
1696
1697// lp->port = cmd->port;
1698 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1699
1700// if (netif_running(dev))
1701// smc_set_port(dev);
1702
1703 ret = 0;
1704 }
1705
1706 return ret;
1707}
1708
1709static void
1710smc_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1711{
1712 strncpy(info->driver, CARDNAME, sizeof(info->driver));
1713 strncpy(info->version, version, sizeof(info->version));
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001714 strncpy(info->bus_info, dev->dev.parent->bus_id, sizeof(info->bus_info));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715}
1716
1717static int smc_ethtool_nwayreset(struct net_device *dev)
1718{
1719 struct smc_local *lp = netdev_priv(dev);
1720 int ret = -EINVAL;
1721
1722 if (lp->phy_type != 0) {
1723 spin_lock_irq(&lp->lock);
1724 ret = mii_nway_restart(&lp->mii);
1725 spin_unlock_irq(&lp->lock);
1726 }
1727
1728 return ret;
1729}
1730
1731static u32 smc_ethtool_getmsglevel(struct net_device *dev)
1732{
1733 struct smc_local *lp = netdev_priv(dev);
1734 return lp->msg_enable;
1735}
1736
1737static void smc_ethtool_setmsglevel(struct net_device *dev, u32 level)
1738{
1739 struct smc_local *lp = netdev_priv(dev);
1740 lp->msg_enable = level;
1741}
1742
Jeff Garzik7282d492006-09-13 14:30:00 -04001743static const struct ethtool_ops smc_ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 .get_settings = smc_ethtool_getsettings,
1745 .set_settings = smc_ethtool_setsettings,
1746 .get_drvinfo = smc_ethtool_getdrvinfo,
1747
1748 .get_msglevel = smc_ethtool_getmsglevel,
1749 .set_msglevel = smc_ethtool_setmsglevel,
1750 .nway_reset = smc_ethtool_nwayreset,
1751 .get_link = ethtool_op_get_link,
1752// .get_eeprom = smc_ethtool_geteeprom,
1753// .set_eeprom = smc_ethtool_seteeprom,
1754};
1755
1756/*
1757 * smc_findirq
1758 *
1759 * This routine has a simple purpose -- make the SMC chip generate an
1760 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1761 */
1762/*
1763 * does this still work?
1764 *
1765 * I just deleted auto_irq.c, since it was never built...
1766 * --jgarzik
1767 */
1768static int __init smc_findirq(void __iomem *ioaddr)
1769{
1770 int timeout = 20;
1771 unsigned long cookie;
1772
1773 DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__);
1774
1775 cookie = probe_irq_on();
1776
1777 /*
1778 * What I try to do here is trigger an ALLOC_INT. This is done
1779 * by allocating a small chunk of memory, which will give an interrupt
1780 * when done.
1781 */
1782 /* enable ALLOCation interrupts ONLY */
1783 SMC_SELECT_BANK(2);
1784 SMC_SET_INT_MASK(IM_ALLOC_INT);
1785
1786 /*
1787 * Allocate 512 bytes of memory. Note that the chip was just
1788 * reset so all the memory is available
1789 */
1790 SMC_SET_MMU_CMD(MC_ALLOC | 1);
1791
1792 /*
1793 * Wait until positive that the interrupt has been generated
1794 */
1795 do {
1796 int int_status;
1797 udelay(10);
1798 int_status = SMC_GET_INT();
1799 if (int_status & IM_ALLOC_INT)
1800 break; /* got the interrupt */
1801 } while (--timeout);
1802
1803 /*
1804 * there is really nothing that I can do here if timeout fails,
1805 * as autoirq_report will return a 0 anyway, which is what I
1806 * want in this case. Plus, the clean up is needed in both
1807 * cases.
1808 */
1809
1810 /* and disable all interrupts again */
1811 SMC_SET_INT_MASK(0);
1812
1813 /* and return what I found */
1814 return probe_irq_off(cookie);
1815}
1816
1817/*
1818 * Function: smc_probe(unsigned long ioaddr)
1819 *
1820 * Purpose:
1821 * Tests to see if a given ioaddr points to an SMC91x chip.
1822 * Returns a 0 on success
1823 *
1824 * Algorithm:
1825 * (1) see if the high byte of BANK_SELECT is 0x33
1826 * (2) compare the ioaddr with the base register's address
1827 * (3) see if I recognize the chip ID in the appropriate register
1828 *
1829 * Here I do typical initialization tasks.
1830 *
1831 * o Initialize the structure if needed
1832 * o print out my vanity message if not done so already
1833 * o print out what type of hardware is detected
1834 * o print out the ethernet address
1835 * o find the IRQ
1836 * o set up my private data
1837 * o configure the dev structure with my subroutines
1838 * o actually GRAB the irq.
1839 * o GRAB the region
1840 */
1841static int __init smc_probe(struct net_device *dev, void __iomem *ioaddr)
1842{
1843 struct smc_local *lp = netdev_priv(dev);
1844 static int version_printed = 0;
1845 int i, retval;
1846 unsigned int val, revision_register;
1847 const char *version_string;
1848
1849 DBG(2, "%s: %s\n", CARDNAME, __FUNCTION__);
1850
1851 /* First, see if the high byte is 0x33 */
1852 val = SMC_CURRENT_BANK();
1853 DBG(2, "%s: bank signature probe returned 0x%04x\n", CARDNAME, val);
1854 if ((val & 0xFF00) != 0x3300) {
1855 if ((val & 0xFF) == 0x33) {
1856 printk(KERN_WARNING
1857 "%s: Detected possible byte-swapped interface"
1858 " at IOADDR %p\n", CARDNAME, ioaddr);
1859 }
1860 retval = -ENODEV;
1861 goto err_out;
1862 }
1863
1864 /*
1865 * The above MIGHT indicate a device, but I need to write to
1866 * further test this.
1867 */
1868 SMC_SELECT_BANK(0);
1869 val = SMC_CURRENT_BANK();
1870 if ((val & 0xFF00) != 0x3300) {
1871 retval = -ENODEV;
1872 goto err_out;
1873 }
1874
1875 /*
1876 * well, we've already written once, so hopefully another
1877 * time won't hurt. This time, I need to switch the bank
1878 * register to bank 1, so I can access the base address
1879 * register
1880 */
1881 SMC_SELECT_BANK(1);
1882 val = SMC_GET_BASE();
1883 val = ((val & 0x1F00) >> 3) << SMC_IO_SHIFT;
Nicolas Pitre53155102005-05-12 20:18:19 -04001884 if (((unsigned int)ioaddr & (0x3e0 << SMC_IO_SHIFT)) != val) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 printk("%s: IOADDR %p doesn't match configuration (%x).\n",
1886 CARDNAME, ioaddr, val);
1887 }
1888
1889 /*
1890 * check if the revision register is something that I
1891 * recognize. These might need to be added to later,
1892 * as future revisions could be added.
1893 */
1894 SMC_SELECT_BANK(3);
1895 revision_register = SMC_GET_REV();
1896 DBG(2, "%s: revision = 0x%04x\n", CARDNAME, revision_register);
1897 version_string = chip_ids[ (revision_register >> 4) & 0xF];
1898 if (!version_string || (revision_register & 0xff00) != 0x3300) {
1899 /* I don't recognize this chip, so... */
1900 printk("%s: IO %p: Unrecognized revision register 0x%04x"
1901 ", Contact author.\n", CARDNAME,
1902 ioaddr, revision_register);
1903
1904 retval = -ENODEV;
1905 goto err_out;
1906 }
1907
1908 /* At this point I'll assume that the chip is an SMC91x. */
1909 if (version_printed++ == 0)
1910 printk("%s", version);
1911
1912 /* fill in some of the fields */
1913 dev->base_addr = (unsigned long)ioaddr;
1914 lp->base = ioaddr;
1915 lp->version = revision_register & 0xff;
1916 spin_lock_init(&lp->lock);
1917
1918 /* Get the MAC address */
1919 SMC_SELECT_BANK(1);
1920 SMC_GET_MAC_ADDR(dev->dev_addr);
1921
1922 /* now, reset the chip, and put it into a known state */
1923 smc_reset(dev);
1924
1925 /*
1926 * If dev->irq is 0, then the device has to be banged on to see
1927 * what the IRQ is.
1928 *
1929 * This banging doesn't always detect the IRQ, for unknown reasons.
1930 * a workaround is to reset the chip and try again.
1931 *
1932 * Interestingly, the DOS packet driver *SETS* the IRQ on the card to
1933 * be what is requested on the command line. I don't do that, mostly
1934 * because the card that I have uses a non-standard method of accessing
1935 * the IRQs, and because this _should_ work in most configurations.
1936 *
1937 * Specifying an IRQ is done with the assumption that the user knows
1938 * what (s)he is doing. No checking is done!!!!
1939 */
1940 if (dev->irq < 1) {
1941 int trials;
1942
1943 trials = 3;
1944 while (trials--) {
1945 dev->irq = smc_findirq(ioaddr);
1946 if (dev->irq)
1947 break;
1948 /* kick the card and try again */
1949 smc_reset(dev);
1950 }
1951 }
1952 if (dev->irq == 0) {
1953 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
1954 dev->name);
1955 retval = -ENODEV;
1956 goto err_out;
1957 }
1958 dev->irq = irq_canonicalize(dev->irq);
1959
1960 /* Fill in the fields of the device structure with ethernet values. */
1961 ether_setup(dev);
1962
1963 dev->open = smc_open;
1964 dev->stop = smc_close;
1965 dev->hard_start_xmit = smc_hard_start_xmit;
1966 dev->tx_timeout = smc_timeout;
1967 dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1968 dev->get_stats = smc_query_statistics;
1969 dev->set_multicast_list = smc_set_multicast_list;
1970 dev->ethtool_ops = &smc_ethtool_ops;
1971#ifdef CONFIG_NET_POLL_CONTROLLER
1972 dev->poll_controller = smc_poll_controller;
1973#endif
1974
1975 tasklet_init(&lp->tx_task, smc_hardware_send_pkt, (unsigned long)dev);
David Howells6d5aefb2006-12-05 19:36:26 +00001976 INIT_WORK(&lp->phy_configure, smc_phy_configure);
1977 lp->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978 lp->mii.phy_id_mask = 0x1f;
1979 lp->mii.reg_num_mask = 0x1f;
1980 lp->mii.force_media = 0;
1981 lp->mii.full_duplex = 0;
1982 lp->mii.dev = dev;
1983 lp->mii.mdio_read = smc_phy_read;
1984 lp->mii.mdio_write = smc_phy_write;
1985
1986 /*
1987 * Locate the phy, if any.
1988 */
1989 if (lp->version >= (CHIP_91100 << 4))
1990 smc_phy_detect(dev);
1991
Nicolas Pitre99e1baf2005-10-05 11:10:24 -04001992 /* then shut everything down to save power */
1993 smc_shutdown(dev);
1994 smc_phy_powerdown(dev);
1995
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996 /* Set default parameters */
1997 lp->msg_enable = NETIF_MSG_LINK;
1998 lp->ctl_rfduplx = 0;
1999 lp->ctl_rspeed = 10;
2000
2001 if (lp->version >= (CHIP_91100 << 4)) {
2002 lp->ctl_rfduplx = 1;
2003 lp->ctl_rspeed = 100;
2004 }
2005
2006 /* Grab the IRQ */
Russell King9ded96f2006-01-08 01:02:07 -08002007 retval = request_irq(dev->irq, &smc_interrupt, SMC_IRQ_FLAGS, dev->name, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008 if (retval)
2009 goto err_out;
2010
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011#ifdef SMC_USE_PXA_DMA
2012 {
2013 int dma = pxa_request_dma(dev->name, DMA_PRIO_LOW,
2014 smc_pxa_dma_irq, NULL);
2015 if (dma >= 0)
2016 dev->dma = dma;
2017 }
2018#endif
2019
2020 retval = register_netdev(dev);
2021 if (retval == 0) {
2022 /* now, print out the card info, in a short format.. */
2023 printk("%s: %s (rev %d) at %p IRQ %d",
2024 dev->name, version_string, revision_register & 0x0f,
2025 lp->base, dev->irq);
2026
2027 if (dev->dma != (unsigned char)-1)
2028 printk(" DMA %d", dev->dma);
2029
2030 printk("%s%s\n", nowait ? " [nowait]" : "",
2031 THROTTLE_TX_PKTS ? " [throttle_tx]" : "");
2032
2033 if (!is_valid_ether_addr(dev->dev_addr)) {
2034 printk("%s: Invalid ethernet MAC address. Please "
2035 "set using ifconfig\n", dev->name);
2036 } else {
2037 /* Print the Ethernet address */
2038 printk("%s: Ethernet addr: ", dev->name);
2039 for (i = 0; i < 5; i++)
2040 printk("%2.2x:", dev->dev_addr[i]);
2041 printk("%2.2x\n", dev->dev_addr[5]);
2042 }
2043
2044 if (lp->phy_type == 0) {
2045 PRINTK("%s: No PHY found\n", dev->name);
2046 } else if ((lp->phy_type & 0xfffffff0) == 0x0016f840) {
2047 PRINTK("%s: PHY LAN83C183 (LAN91C111 Internal)\n", dev->name);
2048 } else if ((lp->phy_type & 0xfffffff0) == 0x02821c50) {
2049 PRINTK("%s: PHY LAN83C180\n", dev->name);
2050 }
2051 }
2052
2053err_out:
2054#ifdef SMC_USE_PXA_DMA
2055 if (retval && dev->dma != (unsigned char)-1)
2056 pxa_free_dma(dev->dma);
2057#endif
2058 return retval;
2059}
2060
2061static int smc_enable_device(struct platform_device *pdev)
2062{
2063 unsigned long flags;
2064 unsigned char ecor, ecsr;
2065 void __iomem *addr;
2066 struct resource * res;
2067
2068 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2069 if (!res)
2070 return 0;
2071
2072 /*
2073 * Map the attribute space. This is overkill, but clean.
2074 */
2075 addr = ioremap(res->start, ATTRIB_SIZE);
2076 if (!addr)
2077 return -ENOMEM;
2078
2079 /*
2080 * Reset the device. We must disable IRQs around this
2081 * since a reset causes the IRQ line become active.
2082 */
2083 local_irq_save(flags);
2084 ecor = readb(addr + (ECOR << SMC_IO_SHIFT)) & ~ECOR_RESET;
2085 writeb(ecor | ECOR_RESET, addr + (ECOR << SMC_IO_SHIFT));
2086 readb(addr + (ECOR << SMC_IO_SHIFT));
2087
2088 /*
2089 * Wait 100us for the chip to reset.
2090 */
2091 udelay(100);
2092
2093 /*
2094 * The device will ignore all writes to the enable bit while
2095 * reset is asserted, even if the reset bit is cleared in the
2096 * same write. Must clear reset first, then enable the device.
2097 */
2098 writeb(ecor, addr + (ECOR << SMC_IO_SHIFT));
2099 writeb(ecor | ECOR_ENABLE, addr + (ECOR << SMC_IO_SHIFT));
2100
2101 /*
2102 * Set the appropriate byte/word mode.
2103 */
2104 ecsr = readb(addr + (ECSR << SMC_IO_SHIFT)) & ~ECSR_IOIS8;
Nicolas Pitre09779c62006-03-20 11:54:27 -05002105 if (!SMC_CAN_USE_16BIT)
2106 ecsr |= ECSR_IOIS8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107 writeb(ecsr, addr + (ECSR << SMC_IO_SHIFT));
2108 local_irq_restore(flags);
2109
2110 iounmap(addr);
2111
2112 /*
2113 * Wait for the chip to wake up. We could poll the control
2114 * register in the main register space, but that isn't mapped
2115 * yet. We know this is going to take 750us.
2116 */
2117 msleep(1);
2118
2119 return 0;
2120}
2121
2122static int smc_request_attrib(struct platform_device *pdev)
2123{
2124 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2125
2126 if (!res)
2127 return 0;
2128
2129 if (!request_mem_region(res->start, ATTRIB_SIZE, CARDNAME))
2130 return -EBUSY;
2131
2132 return 0;
2133}
2134
2135static void smc_release_attrib(struct platform_device *pdev)
2136{
2137 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2138
2139 if (res)
2140 release_mem_region(res->start, ATTRIB_SIZE);
2141}
2142
Nicolas Pitre09779c62006-03-20 11:54:27 -05002143static inline void smc_request_datacs(struct platform_device *pdev, struct net_device *ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002144{
Nicolas Pitre09779c62006-03-20 11:54:27 -05002145 if (SMC_CAN_USE_DATACS) {
2146 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32");
2147 struct smc_local *lp = netdev_priv(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148
Nicolas Pitre09779c62006-03-20 11:54:27 -05002149 if (!res)
2150 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151
Nicolas Pitre09779c62006-03-20 11:54:27 -05002152 if(!request_mem_region(res->start, SMC_DATA_EXTENT, CARDNAME)) {
2153 printk(KERN_INFO "%s: failed to request datacs memory region.\n", CARDNAME);
2154 return;
2155 }
2156
2157 lp->datacs = ioremap(res->start, SMC_DATA_EXTENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159}
2160
2161static void smc_release_datacs(struct platform_device *pdev, struct net_device *ndev)
2162{
Nicolas Pitre09779c62006-03-20 11:54:27 -05002163 if (SMC_CAN_USE_DATACS) {
2164 struct smc_local *lp = netdev_priv(ndev);
2165 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166
Nicolas Pitre09779c62006-03-20 11:54:27 -05002167 if (lp->datacs)
2168 iounmap(lp->datacs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169
Nicolas Pitre09779c62006-03-20 11:54:27 -05002170 lp->datacs = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002171
Nicolas Pitre09779c62006-03-20 11:54:27 -05002172 if (res)
2173 release_mem_region(res->start, SMC_DATA_EXTENT);
2174 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176
2177/*
2178 * smc_init(void)
2179 * Input parameters:
2180 * dev->base_addr == 0, try to find all possible locations
2181 * dev->base_addr > 0x1ff, this is the address to check
2182 * dev->base_addr == <anything else>, return failure code
2183 *
2184 * Output:
2185 * 0 --> there is a device
2186 * anything else, error
2187 */
Russell King3ae5eae2005-11-09 22:32:44 +00002188static int smc_drv_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002190 struct net_device *ndev;
2191 struct resource *res;
2192 unsigned int __iomem *addr;
2193 int ret;
2194
2195 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
2196 if (!res)
2197 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2198 if (!res) {
2199 ret = -ENODEV;
2200 goto out;
2201 }
2202
2203
2204 if (!request_mem_region(res->start, SMC_IO_EXTENT, CARDNAME)) {
2205 ret = -EBUSY;
2206 goto out;
2207 }
2208
2209 ndev = alloc_etherdev(sizeof(struct smc_local));
2210 if (!ndev) {
2211 printk("%s: could not allocate device.\n", CARDNAME);
2212 ret = -ENOMEM;
2213 goto out_release_io;
2214 }
2215 SET_MODULE_OWNER(ndev);
Russell King3ae5eae2005-11-09 22:32:44 +00002216 SET_NETDEV_DEV(ndev, &pdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217
2218 ndev->dma = (unsigned char)-1;
2219 ndev->irq = platform_get_irq(pdev, 0);
David Vrabel48944732006-01-19 17:56:29 +00002220 if (ndev->irq < 0) {
2221 ret = -ENODEV;
2222 goto out_free_netdev;
2223 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224
2225 ret = smc_request_attrib(pdev);
2226 if (ret)
2227 goto out_free_netdev;
2228#if defined(CONFIG_SA1100_ASSABET)
2229 NCR_0 |= NCR_ENET_OSC_EN;
2230#endif
2231 ret = smc_enable_device(pdev);
2232 if (ret)
2233 goto out_release_attrib;
2234
2235 addr = ioremap(res->start, SMC_IO_EXTENT);
2236 if (!addr) {
2237 ret = -ENOMEM;
2238 goto out_release_attrib;
2239 }
2240
Russell King3ae5eae2005-11-09 22:32:44 +00002241 platform_set_drvdata(pdev, ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242 ret = smc_probe(ndev, addr);
2243 if (ret != 0)
2244 goto out_iounmap;
2245#ifdef SMC_USE_PXA_DMA
2246 else {
2247 struct smc_local *lp = netdev_priv(ndev);
2248 lp->physaddr = res->start;
2249 }
2250#endif
2251
2252 smc_request_datacs(pdev, ndev);
2253
2254 return 0;
2255
2256 out_iounmap:
Russell King3ae5eae2005-11-09 22:32:44 +00002257 platform_set_drvdata(pdev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002258 iounmap(addr);
2259 out_release_attrib:
2260 smc_release_attrib(pdev);
2261 out_free_netdev:
2262 free_netdev(ndev);
2263 out_release_io:
2264 release_mem_region(res->start, SMC_IO_EXTENT);
2265 out:
2266 printk("%s: not found (%d).\n", CARDNAME, ret);
2267
2268 return ret;
2269}
2270
Russell King3ae5eae2005-11-09 22:32:44 +00002271static int smc_drv_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002272{
Russell King3ae5eae2005-11-09 22:32:44 +00002273 struct net_device *ndev = platform_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002274 struct smc_local *lp = netdev_priv(ndev);
2275 struct resource *res;
2276
Russell King3ae5eae2005-11-09 22:32:44 +00002277 platform_set_drvdata(pdev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002278
2279 unregister_netdev(ndev);
2280
2281 free_irq(ndev->irq, ndev);
2282
2283#ifdef SMC_USE_PXA_DMA
2284 if (ndev->dma != (unsigned char)-1)
2285 pxa_free_dma(ndev->dma);
2286#endif
2287 iounmap(lp->base);
2288
2289 smc_release_datacs(pdev,ndev);
2290 smc_release_attrib(pdev);
2291
2292 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
2293 if (!res)
2294 platform_get_resource(pdev, IORESOURCE_MEM, 0);
2295 release_mem_region(res->start, SMC_IO_EXTENT);
2296
2297 free_netdev(ndev);
2298
2299 return 0;
2300}
2301
Russell King3ae5eae2005-11-09 22:32:44 +00002302static int smc_drv_suspend(struct platform_device *dev, pm_message_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303{
Russell King3ae5eae2005-11-09 22:32:44 +00002304 struct net_device *ndev = platform_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002305
Russell King9480e302005-10-28 09:52:56 -07002306 if (ndev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307 if (netif_running(ndev)) {
2308 netif_device_detach(ndev);
2309 smc_shutdown(ndev);
2310 smc_phy_powerdown(ndev);
2311 }
2312 }
2313 return 0;
2314}
2315
Russell King3ae5eae2005-11-09 22:32:44 +00002316static int smc_drv_resume(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317{
Russell King3ae5eae2005-11-09 22:32:44 +00002318 struct net_device *ndev = platform_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002319
Russell King9480e302005-10-28 09:52:56 -07002320 if (ndev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002321 struct smc_local *lp = netdev_priv(ndev);
Russell King3ae5eae2005-11-09 22:32:44 +00002322 smc_enable_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002323 if (netif_running(ndev)) {
2324 smc_reset(ndev);
2325 smc_enable(ndev);
2326 if (lp->phy_type != 0)
David Howells6d5aefb2006-12-05 19:36:26 +00002327 smc_phy_configure(&lp->phy_configure);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002328 netif_device_attach(ndev);
2329 }
2330 }
2331 return 0;
2332}
2333
Russell King3ae5eae2005-11-09 22:32:44 +00002334static struct platform_driver smc_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335 .probe = smc_drv_probe,
2336 .remove = smc_drv_remove,
2337 .suspend = smc_drv_suspend,
2338 .resume = smc_drv_resume,
Russell King3ae5eae2005-11-09 22:32:44 +00002339 .driver = {
2340 .name = CARDNAME,
2341 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07002342};
2343
2344static int __init smc_init(void)
2345{
2346#ifdef MODULE
2347#ifdef CONFIG_ISA
2348 if (io == -1)
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002349 printk(KERN_WARNING
Linus Torvalds1da177e2005-04-16 15:20:36 -07002350 "%s: You shouldn't use auto-probing with insmod!\n",
2351 CARDNAME);
2352#endif
2353#endif
2354
Russell King3ae5eae2005-11-09 22:32:44 +00002355 return platform_driver_register(&smc_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002356}
2357
2358static void __exit smc_cleanup(void)
2359{
Russell King3ae5eae2005-11-09 22:32:44 +00002360 platform_driver_unregister(&smc_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002361}
2362
2363module_init(smc_init);
2364module_exit(smc_cleanup);