blob: fc80f250da31e8940bcc2d89d781de5eca66d7f2 [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");
Kay Sievers72abb462008-04-18 13:50:44 -0700135MODULE_ALIAS("platform:smc91x");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137/*
138 * The internal workings of the driver. If you are changing anything
139 * here with the SMC stuff, you should have the datasheet and know
140 * what you are doing.
141 */
142#define CARDNAME "smc91x"
143
144/*
145 * Use power-down feature of the chip
146 */
147#define POWER_DOWN 1
148
149/*
150 * Wait time for memory to be free. This probably shouldn't be
151 * tuned that much, as waiting for this means nothing else happens
152 * in the system
153 */
154#define MEMORY_WAIT_TIME 16
155
156/*
Nicolas Pitre5d0571d2005-11-17 14:02:48 -0500157 * The maximum number of processing loops allowed for each call to the
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400158 * IRQ handler.
Nicolas Pitre5d0571d2005-11-17 14:02:48 -0500159 */
160#define MAX_IRQ_LOOPS 8
161
162/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 * This selects whether TX packets are sent one by one to the SMC91x internal
164 * memory and throttled until transmission completes. This may prevent
165 * RX overruns a litle by keeping much of the memory free for RX packets
166 * but to the expense of reduced TX throughput and increased IRQ overhead.
167 * Note this is not a cure for a too slow data bus or too high IRQ latency.
168 */
169#define THROTTLE_TX_PKTS 0
170
171/*
172 * The MII clock high/low times. 2x this number gives the MII clock period
173 * in microseconds. (was 50, but this gives 6.4ms for each MII transaction!)
174 */
175#define MII_DELAY 1
176
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177#if SMC_DEBUG > 0
178#define DBG(n, args...) \
179 do { \
180 if (SMC_DEBUG >= (n)) \
181 printk(args); \
182 } while (0)
183
184#define PRINTK(args...) printk(args)
185#else
186#define DBG(n, args...) do { } while(0)
187#define PRINTK(args...) printk(KERN_DEBUG args)
188#endif
189
190#if SMC_DEBUG > 3
191static void PRINT_PKT(u_char *buf, int length)
192{
193 int i;
194 int remainder;
195 int lines;
196
197 lines = length / 16;
198 remainder = length % 16;
199
200 for (i = 0; i < lines ; i ++) {
201 int cur;
202 for (cur = 0; cur < 8; cur++) {
203 u_char a, b;
204 a = *buf++;
205 b = *buf++;
206 printk("%02x%02x ", a, b);
207 }
208 printk("\n");
209 }
210 for (i = 0; i < remainder/2 ; i++) {
211 u_char a, b;
212 a = *buf++;
213 b = *buf++;
214 printk("%02x%02x ", a, b);
215 }
216 printk("\n");
217}
218#else
219#define PRINT_PKT(x...) do { } while(0)
220#endif
221
222
223/* this enables an interrupt in the interrupt mask register */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900224#define SMC_ENABLE_INT(lp, x) do { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 unsigned char mask; \
226 spin_lock_irq(&lp->lock); \
Magnus Dammcfdfa862008-02-22 19:55:05 +0900227 mask = SMC_GET_INT_MASK(lp); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 mask |= (x); \
Magnus Dammcfdfa862008-02-22 19:55:05 +0900229 SMC_SET_INT_MASK(lp, mask); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 spin_unlock_irq(&lp->lock); \
231} while (0)
232
233/* this disables an interrupt from the interrupt mask register */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900234#define SMC_DISABLE_INT(lp, x) do { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 unsigned char mask; \
236 spin_lock_irq(&lp->lock); \
Magnus Dammcfdfa862008-02-22 19:55:05 +0900237 mask = SMC_GET_INT_MASK(lp); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 mask &= ~(x); \
Magnus Dammcfdfa862008-02-22 19:55:05 +0900239 SMC_SET_INT_MASK(lp, mask); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 spin_unlock_irq(&lp->lock); \
241} while (0)
242
243/*
244 * Wait while MMU is busy. This is usually in the order of a few nanosecs
245 * if at all, but let's avoid deadlocking the system if the hardware
246 * decides to go south.
247 */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900248#define SMC_WAIT_MMU_BUSY(lp) do { \
249 if (unlikely(SMC_GET_MMU_CMD(lp) & MC_BUSY)) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 unsigned long timeout = jiffies + 2; \
Magnus Dammcfdfa862008-02-22 19:55:05 +0900251 while (SMC_GET_MMU_CMD(lp) & MC_BUSY) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 if (time_after(jiffies, timeout)) { \
253 printk("%s: timeout %s line %d\n", \
254 dev->name, __FILE__, __LINE__); \
255 break; \
256 } \
257 cpu_relax(); \
258 } \
259 } \
260} while (0)
261
262
263/*
264 * this does a soft reset on the device
265 */
266static void smc_reset(struct net_device *dev)
267{
268 struct smc_local *lp = netdev_priv(dev);
269 void __iomem *ioaddr = lp->base;
270 unsigned int ctl, cfg;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400271 struct sk_buff *pending_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700273 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
Nicolas Pitrebe836682005-06-19 23:56:21 -0400275 /* Disable all interrupts, block TX tasklet */
Russell King76cb4fe2006-08-14 23:00:20 -0700276 spin_lock_irq(&lp->lock);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900277 SMC_SELECT_BANK(lp, 2);
278 SMC_SET_INT_MASK(lp, 0);
Nicolas Pitrebe836682005-06-19 23:56:21 -0400279 pending_skb = lp->pending_tx_skb;
280 lp->pending_tx_skb = NULL;
Russell King76cb4fe2006-08-14 23:00:20 -0700281 spin_unlock_irq(&lp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
Nicolas Pitrebe836682005-06-19 23:56:21 -0400283 /* free any pending tx skb */
284 if (pending_skb) {
285 dev_kfree_skb(pending_skb);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700286 dev->stats.tx_errors++;
287 dev->stats.tx_aborted_errors++;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400288 }
289
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 /*
291 * This resets the registers mostly to defaults, but doesn't
292 * affect EEPROM. That seems unnecessary
293 */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900294 SMC_SELECT_BANK(lp, 0);
295 SMC_SET_RCR(lp, RCR_SOFTRST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297 /*
298 * Setup the Configuration Register
299 * This is necessary because the CONFIG_REG is not affected
300 * by a soft reset
301 */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900302 SMC_SELECT_BANK(lp, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
304 cfg = CONFIG_DEFAULT;
305
306 /*
307 * Setup for fast accesses if requested. If the card/system
308 * can't handle it then there will be no recovery except for
309 * a hard reset or power cycle
310 */
Eric Miaoc4f0e762008-06-19 17:39:03 +0800311 if (lp->cfg.flags & SMC91X_NOWAIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 cfg |= CONFIG_NO_WAIT;
313
314 /*
315 * Release from possible power-down state
316 * Configuration register is not affected by Soft Reset
317 */
318 cfg |= CONFIG_EPH_POWER_EN;
319
Magnus Dammcfdfa862008-02-22 19:55:05 +0900320 SMC_SET_CONFIG(lp, cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
322 /* this should pause enough for the chip to be happy */
323 /*
324 * elaborate? What does the chip _need_? --jgarzik
325 *
326 * This seems to be undocumented, but something the original
327 * driver(s) have always done. Suspect undocumented timing
328 * info/determined empirically. --rmk
329 */
330 udelay(1);
331
332 /* Disable transmit and receive functionality */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900333 SMC_SELECT_BANK(lp, 0);
334 SMC_SET_RCR(lp, RCR_CLEAR);
335 SMC_SET_TCR(lp, TCR_CLEAR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
Magnus Dammcfdfa862008-02-22 19:55:05 +0900337 SMC_SELECT_BANK(lp, 1);
338 ctl = SMC_GET_CTL(lp) | CTL_LE_ENABLE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340 /*
341 * Set the control register to automatically release successfully
342 * transmitted packets, to make the best use out of our limited
343 * memory
344 */
345 if(!THROTTLE_TX_PKTS)
346 ctl |= CTL_AUTO_RELEASE;
347 else
348 ctl &= ~CTL_AUTO_RELEASE;
Magnus Dammcfdfa862008-02-22 19:55:05 +0900349 SMC_SET_CTL(lp, ctl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
351 /* Reset the MMU */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900352 SMC_SELECT_BANK(lp, 2);
353 SMC_SET_MMU_CMD(lp, MC_RESET);
354 SMC_WAIT_MMU_BUSY(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355}
356
357/*
358 * Enable Interrupts, Receive, and Transmit
359 */
360static void smc_enable(struct net_device *dev)
361{
362 struct smc_local *lp = netdev_priv(dev);
363 void __iomem *ioaddr = lp->base;
364 int mask;
365
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700366 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
368 /* see the header file for options in TCR/RCR DEFAULT */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900369 SMC_SELECT_BANK(lp, 0);
370 SMC_SET_TCR(lp, lp->tcr_cur_mode);
371 SMC_SET_RCR(lp, lp->rcr_cur_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
Magnus Dammcfdfa862008-02-22 19:55:05 +0900373 SMC_SELECT_BANK(lp, 1);
374 SMC_SET_MAC_ADDR(lp, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
376 /* now, enable interrupts */
377 mask = IM_EPH_INT|IM_RX_OVRN_INT|IM_RCV_INT;
378 if (lp->version >= (CHIP_91100 << 4))
379 mask |= IM_MDINT;
Magnus Dammcfdfa862008-02-22 19:55:05 +0900380 SMC_SELECT_BANK(lp, 2);
381 SMC_SET_INT_MASK(lp, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
383 /*
384 * From this point the register bank must _NOT_ be switched away
385 * to something else than bank 2 without proper locking against
386 * races with any tasklet or interrupt handlers until smc_shutdown()
387 * or smc_reset() is called.
388 */
389}
390
391/*
392 * this puts the device in an inactive state
393 */
394static void smc_shutdown(struct net_device *dev)
395{
396 struct smc_local *lp = netdev_priv(dev);
397 void __iomem *ioaddr = lp->base;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400398 struct sk_buff *pending_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700400 DBG(2, "%s: %s\n", CARDNAME, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
402 /* no more interrupts for me */
Russell King76cb4fe2006-08-14 23:00:20 -0700403 spin_lock_irq(&lp->lock);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900404 SMC_SELECT_BANK(lp, 2);
405 SMC_SET_INT_MASK(lp, 0);
Nicolas Pitrebe836682005-06-19 23:56:21 -0400406 pending_skb = lp->pending_tx_skb;
407 lp->pending_tx_skb = NULL;
Russell King76cb4fe2006-08-14 23:00:20 -0700408 spin_unlock_irq(&lp->lock);
Nicolas Pitrebe836682005-06-19 23:56:21 -0400409 if (pending_skb)
410 dev_kfree_skb(pending_skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411
412 /* and tell the card to stay away from that nasty outside world */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900413 SMC_SELECT_BANK(lp, 0);
414 SMC_SET_RCR(lp, RCR_CLEAR);
415 SMC_SET_TCR(lp, TCR_CLEAR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
417#ifdef POWER_DOWN
418 /* finally, shut the chip down */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900419 SMC_SELECT_BANK(lp, 1);
420 SMC_SET_CONFIG(lp, SMC_GET_CONFIG(lp) & ~CONFIG_EPH_POWER_EN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421#endif
422}
423
424/*
425 * This is the procedure to handle the receipt of a packet.
426 */
427static inline void smc_rcv(struct net_device *dev)
428{
429 struct smc_local *lp = netdev_priv(dev);
430 void __iomem *ioaddr = lp->base;
431 unsigned int packet_number, status, packet_len;
432
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700433 DBG(3, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
Magnus Dammcfdfa862008-02-22 19:55:05 +0900435 packet_number = SMC_GET_RXFIFO(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 if (unlikely(packet_number & RXFIFO_REMPTY)) {
437 PRINTK("%s: smc_rcv with nothing on FIFO.\n", dev->name);
438 return;
439 }
440
441 /* read from start of packet */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900442 SMC_SET_PTR(lp, PTR_READ | PTR_RCV | PTR_AUTOINC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
444 /* First two words are status and packet length */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900445 SMC_GET_PKT_HDR(lp, status, packet_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 packet_len &= 0x07ff; /* mask off top bits */
447 DBG(2, "%s: RX PNR 0x%x STATUS 0x%04x LENGTH 0x%04x (%d)\n",
448 dev->name, packet_number, status,
449 packet_len, packet_len);
450
451 back:
452 if (unlikely(packet_len < 6 || status & RS_ERRORS)) {
453 if (status & RS_TOOLONG && packet_len <= (1514 + 4 + 6)) {
454 /* accept VLAN packets */
455 status &= ~RS_TOOLONG;
456 goto back;
457 }
458 if (packet_len < 6) {
459 /* bloody hardware */
460 printk(KERN_ERR "%s: fubar (rxlen %u status %x\n",
461 dev->name, packet_len, status);
462 status |= RS_TOOSHORT;
463 }
Magnus Dammcfdfa862008-02-22 19:55:05 +0900464 SMC_WAIT_MMU_BUSY(lp);
465 SMC_SET_MMU_CMD(lp, MC_RELEASE);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700466 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 if (status & RS_ALGNERR)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700468 dev->stats.rx_frame_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 if (status & (RS_TOOSHORT | RS_TOOLONG))
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700470 dev->stats.rx_length_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 if (status & RS_BADCRC)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700472 dev->stats.rx_crc_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 } else {
474 struct sk_buff *skb;
475 unsigned char *data;
476 unsigned int data_len;
477
478 /* set multicast stats */
479 if (status & RS_MULTICAST)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700480 dev->stats.multicast++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
482 /*
483 * Actual payload is packet_len - 6 (or 5 if odd byte).
484 * We want skb_reserve(2) and the final ctrl word
485 * (2 bytes, possibly containing the payload odd byte).
486 * Furthermore, we add 2 bytes to allow rounding up to
487 * multiple of 4 bytes on 32 bit buses.
488 * Hence packet_len - 6 + 2 + 2 + 2.
489 */
490 skb = dev_alloc_skb(packet_len);
491 if (unlikely(skb == NULL)) {
492 printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
493 dev->name);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900494 SMC_WAIT_MMU_BUSY(lp);
495 SMC_SET_MMU_CMD(lp, MC_RELEASE);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700496 dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 return;
498 }
499
500 /* Align IP header to 32 bits */
501 skb_reserve(skb, 2);
502
503 /* BUG: the LAN91C111 rev A never sets this bit. Force it. */
504 if (lp->version == 0x90)
505 status |= RS_ODDFRAME;
506
507 /*
508 * If odd length: packet_len - 5,
509 * otherwise packet_len - 6.
510 * With the trailing ctrl byte it's packet_len - 4.
511 */
512 data_len = packet_len - ((status & RS_ODDFRAME) ? 5 : 6);
513 data = skb_put(skb, data_len);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900514 SMC_PULL_DATA(lp, data, packet_len - 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515
Magnus Dammcfdfa862008-02-22 19:55:05 +0900516 SMC_WAIT_MMU_BUSY(lp);
517 SMC_SET_MMU_CMD(lp, MC_RELEASE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518
519 PRINT_PKT(data, packet_len - 4);
520
521 dev->last_rx = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 skb->protocol = eth_type_trans(skb, dev);
523 netif_rx(skb);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700524 dev->stats.rx_packets++;
525 dev->stats.rx_bytes += data_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 }
527}
528
529#ifdef CONFIG_SMP
530/*
531 * On SMP we have the following problem:
532 *
533 * A = smc_hardware_send_pkt()
534 * B = smc_hard_start_xmit()
535 * C = smc_interrupt()
536 *
537 * A and B can never be executed simultaneously. However, at least on UP,
538 * it is possible (and even desirable) for C to interrupt execution of
539 * A or B in order to have better RX reliability and avoid overruns.
540 * C, just like A and B, must have exclusive access to the chip and
541 * each of them must lock against any other concurrent access.
542 * Unfortunately this is not possible to have C suspend execution of A or
543 * B taking place on another CPU. On UP this is no an issue since A and B
544 * are run from softirq context and C from hard IRQ context, and there is
545 * no other CPU where concurrent access can happen.
546 * If ever there is a way to force at least B and C to always be executed
547 * on the same CPU then we could use read/write locks to protect against
548 * any other concurrent access and C would always interrupt B. But life
549 * isn't that easy in a SMP world...
550 */
551#define smc_special_trylock(lock) \
552({ \
553 int __ret; \
554 local_irq_disable(); \
555 __ret = spin_trylock(lock); \
556 if (!__ret) \
557 local_irq_enable(); \
558 __ret; \
559})
560#define smc_special_lock(lock) spin_lock_irq(lock)
561#define smc_special_unlock(lock) spin_unlock_irq(lock)
562#else
563#define smc_special_trylock(lock) (1)
564#define smc_special_lock(lock) do { } while (0)
565#define smc_special_unlock(lock) do { } while (0)
566#endif
567
568/*
569 * This is called to actually send a packet to the chip.
570 */
571static void smc_hardware_send_pkt(unsigned long data)
572{
573 struct net_device *dev = (struct net_device *)data;
574 struct smc_local *lp = netdev_priv(dev);
575 void __iomem *ioaddr = lp->base;
576 struct sk_buff *skb;
577 unsigned int packet_no, len;
578 unsigned char *buf;
579
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700580 DBG(3, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
582 if (!smc_special_trylock(&lp->lock)) {
583 netif_stop_queue(dev);
584 tasklet_schedule(&lp->tx_task);
585 return;
586 }
587
588 skb = lp->pending_tx_skb;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400589 if (unlikely(!skb)) {
590 smc_special_unlock(&lp->lock);
591 return;
592 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 lp->pending_tx_skb = NULL;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400594
Magnus Dammcfdfa862008-02-22 19:55:05 +0900595 packet_no = SMC_GET_AR(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 if (unlikely(packet_no & AR_FAILED)) {
597 printk("%s: Memory allocation failed.\n", dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700598 dev->stats.tx_errors++;
599 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 smc_special_unlock(&lp->lock);
601 goto done;
602 }
603
604 /* point to the beginning of the packet */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900605 SMC_SET_PN(lp, packet_no);
606 SMC_SET_PTR(lp, PTR_AUTOINC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
608 buf = skb->data;
609 len = skb->len;
610 DBG(2, "%s: TX PNR 0x%x LENGTH 0x%04x (%d) BUF 0x%p\n",
611 dev->name, packet_no, len, len, buf);
612 PRINT_PKT(buf, len);
613
614 /*
615 * Send the packet length (+6 for status words, length, and ctl.
616 * The card will pad to 64 bytes with zeroes if packet is too small.
617 */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900618 SMC_PUT_PKT_HDR(lp, 0, len + 6);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
620 /* send the actual data */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900621 SMC_PUSH_DATA(lp, buf, len & ~1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
623 /* Send final ctl word with the last byte if there is one */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900624 SMC_outw(((len & 1) ? (0x2000 | buf[len-1]) : 0), ioaddr, DATA_REG(lp));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
626 /*
Nicolas Pitreea937562005-04-12 16:26:40 -0400627 * If THROTTLE_TX_PKTS is set, we stop the queue here. This will
628 * have the effect of having at most one packet queued for TX
629 * in the chip's memory at all time.
630 *
631 * If THROTTLE_TX_PKTS is not set then the queue is stopped only
632 * when memory allocation (MC_ALLOC) does not succeed right away.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 */
Nicolas Pitreea937562005-04-12 16:26:40 -0400634 if (THROTTLE_TX_PKTS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 netif_stop_queue(dev);
636
637 /* queue the packet for TX */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900638 SMC_SET_MMU_CMD(lp, MC_ENQUEUE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 smc_special_unlock(&lp->lock);
640
641 dev->trans_start = jiffies;
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700642 dev->stats.tx_packets++;
643 dev->stats.tx_bytes += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644
Magnus Dammcfdfa862008-02-22 19:55:05 +0900645 SMC_ENABLE_INT(lp, IM_TX_INT | IM_TX_EMPTY_INT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646
647done: if (!THROTTLE_TX_PKTS)
648 netif_wake_queue(dev);
649
650 dev_kfree_skb(skb);
651}
652
653/*
654 * Since I am not sure if I will have enough room in the chip's ram
655 * to store the packet, I call this routine which either sends it
656 * now, or set the card to generates an interrupt when ready
657 * for the packet.
658 */
659static int smc_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
660{
661 struct smc_local *lp = netdev_priv(dev);
662 void __iomem *ioaddr = lp->base;
663 unsigned int numPages, poll_count, status;
664
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700665 DBG(3, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666
667 BUG_ON(lp->pending_tx_skb != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
669 /*
670 * The MMU wants the number of pages to be the number of 256 bytes
671 * 'pages', minus 1 (since a packet can't ever have 0 pages :))
672 *
673 * The 91C111 ignores the size bits, but earlier models don't.
674 *
675 * Pkt size for allocating is data length +6 (for additional status
676 * words, length and ctl)
677 *
678 * If odd size then last byte is included in ctl word.
679 */
680 numPages = ((skb->len & ~1) + (6 - 1)) >> 8;
681 if (unlikely(numPages > 7)) {
682 printk("%s: Far too big packet error.\n", dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700683 dev->stats.tx_errors++;
684 dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 dev_kfree_skb(skb);
686 return 0;
687 }
688
689 smc_special_lock(&lp->lock);
690
691 /* now, try to allocate the memory */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900692 SMC_SET_MMU_CMD(lp, MC_ALLOC | numPages);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693
694 /*
695 * Poll the chip for a short amount of time in case the
696 * allocation succeeds quickly.
697 */
698 poll_count = MEMORY_WAIT_TIME;
699 do {
Magnus Dammcfdfa862008-02-22 19:55:05 +0900700 status = SMC_GET_INT(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 if (status & IM_ALLOC_INT) {
Magnus Dammcfdfa862008-02-22 19:55:05 +0900702 SMC_ACK_INT(lp, IM_ALLOC_INT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 break;
704 }
705 } while (--poll_count);
706
707 smc_special_unlock(&lp->lock);
708
Nicolas Pitrebe836682005-06-19 23:56:21 -0400709 lp->pending_tx_skb = skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 if (!poll_count) {
711 /* oh well, wait until the chip finds memory later */
712 netif_stop_queue(dev);
713 DBG(2, "%s: TX memory allocation deferred.\n", dev->name);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900714 SMC_ENABLE_INT(lp, IM_ALLOC_INT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 } else {
716 /*
717 * Allocation succeeded: push packet to the chip's own memory
718 * immediately.
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400719 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 smc_hardware_send_pkt((unsigned long)dev);
721 }
722
723 return 0;
724}
725
726/*
727 * This handles a TX interrupt, which is only called when:
728 * - a TX error occurred, or
729 * - CTL_AUTO_RELEASE is not set and TX of a packet completed.
730 */
731static void smc_tx(struct net_device *dev)
732{
733 struct smc_local *lp = netdev_priv(dev);
734 void __iomem *ioaddr = lp->base;
735 unsigned int saved_packet, packet_no, tx_status, pkt_len;
736
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700737 DBG(3, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738
739 /* If the TX FIFO is empty then nothing to do */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900740 packet_no = SMC_GET_TXFIFO(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 if (unlikely(packet_no & TXFIFO_TEMPTY)) {
742 PRINTK("%s: smc_tx with nothing on FIFO.\n", dev->name);
743 return;
744 }
745
746 /* select packet to read from */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900747 saved_packet = SMC_GET_PN(lp);
748 SMC_SET_PN(lp, packet_no);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749
750 /* read the first word (status word) from this packet */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900751 SMC_SET_PTR(lp, PTR_AUTOINC | PTR_READ);
752 SMC_GET_PKT_HDR(lp, tx_status, pkt_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 DBG(2, "%s: TX STATUS 0x%04x PNR 0x%02x\n",
754 dev->name, tx_status, packet_no);
755
Nicolas Pitre8de90112005-04-12 16:21:11 -0400756 if (!(tx_status & ES_TX_SUC))
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700757 dev->stats.tx_errors++;
Nicolas Pitre8de90112005-04-12 16:21:11 -0400758
759 if (tx_status & ES_LOSTCARR)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700760 dev->stats.tx_carrier_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761
Nicolas Pitre8de90112005-04-12 16:21:11 -0400762 if (tx_status & (ES_LATCOL | ES_16COL)) {
763 PRINTK("%s: %s occurred on last xmit\n", dev->name,
764 (tx_status & ES_LATCOL) ?
765 "late collision" : "too many collisions");
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700766 dev->stats.tx_window_errors++;
767 if (!(dev->stats.tx_window_errors & 63) && net_ratelimit()) {
Nicolas Pitre8de90112005-04-12 16:21:11 -0400768 printk(KERN_INFO "%s: unexpectedly large number of "
769 "bad collisions. Please check duplex "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 "setting.\n", dev->name);
771 }
772 }
773
774 /* kill the packet */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900775 SMC_WAIT_MMU_BUSY(lp);
776 SMC_SET_MMU_CMD(lp, MC_FREEPKT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777
778 /* Don't restore Packet Number Reg until busy bit is cleared */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900779 SMC_WAIT_MMU_BUSY(lp);
780 SMC_SET_PN(lp, saved_packet);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781
782 /* re-enable transmit */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900783 SMC_SELECT_BANK(lp, 0);
784 SMC_SET_TCR(lp, lp->tcr_cur_mode);
785 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786}
787
788
789/*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
790
791static void smc_mii_out(struct net_device *dev, unsigned int val, int bits)
792{
793 struct smc_local *lp = netdev_priv(dev);
794 void __iomem *ioaddr = lp->base;
795 unsigned int mii_reg, mask;
796
Magnus Dammcfdfa862008-02-22 19:55:05 +0900797 mii_reg = SMC_GET_MII(lp) & ~(MII_MCLK | MII_MDOE | MII_MDO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 mii_reg |= MII_MDOE;
799
800 for (mask = 1 << (bits - 1); mask; mask >>= 1) {
801 if (val & mask)
802 mii_reg |= MII_MDO;
803 else
804 mii_reg &= ~MII_MDO;
805
Magnus Dammcfdfa862008-02-22 19:55:05 +0900806 SMC_SET_MII(lp, mii_reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 udelay(MII_DELAY);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900808 SMC_SET_MII(lp, mii_reg | MII_MCLK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 udelay(MII_DELAY);
810 }
811}
812
813static unsigned int smc_mii_in(struct net_device *dev, int bits)
814{
815 struct smc_local *lp = netdev_priv(dev);
816 void __iomem *ioaddr = lp->base;
817 unsigned int mii_reg, mask, val;
818
Magnus Dammcfdfa862008-02-22 19:55:05 +0900819 mii_reg = SMC_GET_MII(lp) & ~(MII_MCLK | MII_MDOE | MII_MDO);
820 SMC_SET_MII(lp, mii_reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
822 for (mask = 1 << (bits - 1), val = 0; mask; mask >>= 1) {
Magnus Dammcfdfa862008-02-22 19:55:05 +0900823 if (SMC_GET_MII(lp) & MII_MDI)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 val |= mask;
825
Magnus Dammcfdfa862008-02-22 19:55:05 +0900826 SMC_SET_MII(lp, mii_reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 udelay(MII_DELAY);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900828 SMC_SET_MII(lp, mii_reg | MII_MCLK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 udelay(MII_DELAY);
830 }
831
832 return val;
833}
834
835/*
836 * Reads a register from the MII Management serial interface
837 */
838static int smc_phy_read(struct net_device *dev, int phyaddr, int phyreg)
839{
840 struct smc_local *lp = netdev_priv(dev);
841 void __iomem *ioaddr = lp->base;
842 unsigned int phydata;
843
Magnus Dammcfdfa862008-02-22 19:55:05 +0900844 SMC_SELECT_BANK(lp, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845
846 /* Idle - 32 ones */
847 smc_mii_out(dev, 0xffffffff, 32);
848
849 /* Start code (01) + read (10) + phyaddr + phyreg */
850 smc_mii_out(dev, 6 << 10 | phyaddr << 5 | phyreg, 14);
851
852 /* Turnaround (2bits) + phydata */
853 phydata = smc_mii_in(dev, 18);
854
855 /* Return to idle state */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900856 SMC_SET_MII(lp, SMC_GET_MII(lp) & ~(MII_MCLK|MII_MDOE|MII_MDO));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857
858 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700859 __func__, phyaddr, phyreg, phydata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
Magnus Dammcfdfa862008-02-22 19:55:05 +0900861 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 return phydata;
863}
864
865/*
866 * Writes a register to the MII Management serial interface
867 */
868static void smc_phy_write(struct net_device *dev, int phyaddr, int phyreg,
869 int phydata)
870{
871 struct smc_local *lp = netdev_priv(dev);
872 void __iomem *ioaddr = lp->base;
873
Magnus Dammcfdfa862008-02-22 19:55:05 +0900874 SMC_SELECT_BANK(lp, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875
876 /* Idle - 32 ones */
877 smc_mii_out(dev, 0xffffffff, 32);
878
879 /* Start code (01) + write (01) + phyaddr + phyreg + turnaround + phydata */
880 smc_mii_out(dev, 5 << 28 | phyaddr << 23 | phyreg << 18 | 2 << 16 | phydata, 32);
881
882 /* Return to idle state */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900883 SMC_SET_MII(lp, SMC_GET_MII(lp) & ~(MII_MCLK|MII_MDOE|MII_MDO));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884
885 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700886 __func__, phyaddr, phyreg, phydata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887
Magnus Dammcfdfa862008-02-22 19:55:05 +0900888 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889}
890
891/*
892 * Finds and reports the PHY address
893 */
894static void smc_phy_detect(struct net_device *dev)
895{
896 struct smc_local *lp = netdev_priv(dev);
897 int phyaddr;
898
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700899 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900
901 lp->phy_type = 0;
902
903 /*
904 * Scan all 32 PHY addresses if necessary, starting at
905 * PHY#1 to PHY#31, and then PHY#0 last.
906 */
907 for (phyaddr = 1; phyaddr < 33; ++phyaddr) {
908 unsigned int id1, id2;
909
910 /* Read the PHY identifiers */
911 id1 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID1);
912 id2 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID2);
913
914 DBG(3, "%s: phy_id1=0x%x, phy_id2=0x%x\n",
915 dev->name, id1, id2);
916
917 /* Make sure it is a valid identifier */
918 if (id1 != 0x0000 && id1 != 0xffff && id1 != 0x8000 &&
919 id2 != 0x0000 && id2 != 0xffff && id2 != 0x8000) {
920 /* Save the PHY's address */
921 lp->mii.phy_id = phyaddr & 31;
922 lp->phy_type = id1 << 16 | id2;
923 break;
924 }
925 }
926}
927
928/*
929 * Sets the PHY to a configuration as determined by the user
930 */
931static int smc_phy_fixed(struct net_device *dev)
932{
933 struct smc_local *lp = netdev_priv(dev);
934 void __iomem *ioaddr = lp->base;
935 int phyaddr = lp->mii.phy_id;
936 int bmcr, cfg1;
937
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700938 DBG(3, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
940 /* Enter Link Disable state */
941 cfg1 = smc_phy_read(dev, phyaddr, PHY_CFG1_REG);
942 cfg1 |= PHY_CFG1_LNKDIS;
943 smc_phy_write(dev, phyaddr, PHY_CFG1_REG, cfg1);
944
945 /*
946 * Set our fixed capabilities
947 * Disable auto-negotiation
948 */
949 bmcr = 0;
950
951 if (lp->ctl_rfduplx)
952 bmcr |= BMCR_FULLDPLX;
953
954 if (lp->ctl_rspeed == 100)
955 bmcr |= BMCR_SPEED100;
956
957 /* Write our capabilities to the phy control register */
958 smc_phy_write(dev, phyaddr, MII_BMCR, bmcr);
959
960 /* Re-Configure the Receive/Phy Control register */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900961 SMC_SELECT_BANK(lp, 0);
962 SMC_SET_RPC(lp, lp->rpc_cur_mode);
963 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964
965 return 1;
966}
967
968/*
969 * smc_phy_reset - reset the phy
970 * @dev: net device
971 * @phy: phy address
972 *
973 * Issue a software reset for the specified PHY and
974 * wait up to 100ms for the reset to complete. We should
975 * not access the PHY for 50ms after issuing the reset.
976 *
977 * The time to wait appears to be dependent on the PHY.
978 *
979 * Must be called with lp->lock locked.
980 */
981static int smc_phy_reset(struct net_device *dev, int phy)
982{
983 struct smc_local *lp = netdev_priv(dev);
984 unsigned int bmcr;
985 int timeout;
986
987 smc_phy_write(dev, phy, MII_BMCR, BMCR_RESET);
988
989 for (timeout = 2; timeout; timeout--) {
990 spin_unlock_irq(&lp->lock);
991 msleep(50);
992 spin_lock_irq(&lp->lock);
993
994 bmcr = smc_phy_read(dev, phy, MII_BMCR);
995 if (!(bmcr & BMCR_RESET))
996 break;
997 }
998
999 return bmcr & BMCR_RESET;
1000}
1001
1002/*
1003 * smc_phy_powerdown - powerdown phy
1004 * @dev: net device
1005 *
1006 * Power down the specified PHY
1007 */
1008static void smc_phy_powerdown(struct net_device *dev)
1009{
1010 struct smc_local *lp = netdev_priv(dev);
1011 unsigned int bmcr;
1012 int phy = lp->mii.phy_id;
1013
1014 if (lp->phy_type == 0)
1015 return;
1016
1017 /* We need to ensure that no calls to smc_phy_configure are
1018 pending.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 */
David S. Miller4bb073c2008-06-12 02:22:02 -07001020 cancel_work_sync(&lp->phy_configure);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021
1022 bmcr = smc_phy_read(dev, phy, MII_BMCR);
1023 smc_phy_write(dev, phy, MII_BMCR, bmcr | BMCR_PDOWN);
1024}
1025
1026/*
1027 * smc_phy_check_media - check the media status and adjust TCR
1028 * @dev: net device
1029 * @init: set true for initialisation
1030 *
1031 * Select duplex mode depending on negotiation state. This
1032 * also updates our carrier state.
1033 */
1034static void smc_phy_check_media(struct net_device *dev, int init)
1035{
1036 struct smc_local *lp = netdev_priv(dev);
1037 void __iomem *ioaddr = lp->base;
1038
1039 if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
1040 /* duplex state has changed */
1041 if (lp->mii.full_duplex) {
1042 lp->tcr_cur_mode |= TCR_SWFDUP;
1043 } else {
1044 lp->tcr_cur_mode &= ~TCR_SWFDUP;
1045 }
1046
Magnus Dammcfdfa862008-02-22 19:55:05 +09001047 SMC_SELECT_BANK(lp, 0);
1048 SMC_SET_TCR(lp, lp->tcr_cur_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 }
1050}
1051
1052/*
1053 * Configures the specified PHY through the MII management interface
1054 * using Autonegotiation.
1055 * Calls smc_phy_fixed() if the user has requested a certain config.
1056 * If RPC ANEG bit is set, the media selection is dependent purely on
1057 * the selection by the MII (either in the MII BMCR reg or the result
1058 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
1059 * is controlled by the RPC SPEED and RPC DPLX bits.
1060 */
David Howells6d5aefb2006-12-05 19:36:26 +00001061static void smc_phy_configure(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062{
David Howells6d5aefb2006-12-05 19:36:26 +00001063 struct smc_local *lp =
1064 container_of(work, struct smc_local, phy_configure);
1065 struct net_device *dev = lp->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 void __iomem *ioaddr = lp->base;
1067 int phyaddr = lp->mii.phy_id;
1068 int my_phy_caps; /* My PHY capabilities */
1069 int my_ad_caps; /* My Advertised capabilities */
1070 int status;
1071
1072 DBG(3, "%s:smc_program_phy()\n", dev->name);
1073
1074 spin_lock_irq(&lp->lock);
1075
1076 /*
1077 * We should not be called if phy_type is zero.
1078 */
1079 if (lp->phy_type == 0)
1080 goto smc_phy_configure_exit;
1081
1082 if (smc_phy_reset(dev, phyaddr)) {
1083 printk("%s: PHY reset timed out\n", dev->name);
1084 goto smc_phy_configure_exit;
1085 }
1086
1087 /*
1088 * Enable PHY Interrupts (for register 18)
1089 * Interrupts listed here are disabled
1090 */
1091 smc_phy_write(dev, phyaddr, PHY_MASK_REG,
1092 PHY_INT_LOSSSYNC | PHY_INT_CWRD | PHY_INT_SSD |
1093 PHY_INT_ESD | PHY_INT_RPOL | PHY_INT_JAB |
1094 PHY_INT_SPDDET | PHY_INT_DPLXDET);
1095
1096 /* Configure the Receive/Phy Control register */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001097 SMC_SELECT_BANK(lp, 0);
1098 SMC_SET_RPC(lp, lp->rpc_cur_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099
1100 /* If the user requested no auto neg, then go set his request */
1101 if (lp->mii.force_media) {
1102 smc_phy_fixed(dev);
1103 goto smc_phy_configure_exit;
1104 }
1105
1106 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
1107 my_phy_caps = smc_phy_read(dev, phyaddr, MII_BMSR);
1108
1109 if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
1110 printk(KERN_INFO "Auto negotiation NOT supported\n");
1111 smc_phy_fixed(dev);
1112 goto smc_phy_configure_exit;
1113 }
1114
1115 my_ad_caps = ADVERTISE_CSMA; /* I am CSMA capable */
1116
1117 if (my_phy_caps & BMSR_100BASE4)
1118 my_ad_caps |= ADVERTISE_100BASE4;
1119 if (my_phy_caps & BMSR_100FULL)
1120 my_ad_caps |= ADVERTISE_100FULL;
1121 if (my_phy_caps & BMSR_100HALF)
1122 my_ad_caps |= ADVERTISE_100HALF;
1123 if (my_phy_caps & BMSR_10FULL)
1124 my_ad_caps |= ADVERTISE_10FULL;
1125 if (my_phy_caps & BMSR_10HALF)
1126 my_ad_caps |= ADVERTISE_10HALF;
1127
1128 /* Disable capabilities not selected by our user */
1129 if (lp->ctl_rspeed != 100)
1130 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
1131
1132 if (!lp->ctl_rfduplx)
1133 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
1134
1135 /* Update our Auto-Neg Advertisement Register */
1136 smc_phy_write(dev, phyaddr, MII_ADVERTISE, my_ad_caps);
1137 lp->mii.advertising = my_ad_caps;
1138
1139 /*
1140 * Read the register back. Without this, it appears that when
1141 * auto-negotiation is restarted, sometimes it isn't ready and
1142 * the link does not come up.
1143 */
1144 status = smc_phy_read(dev, phyaddr, MII_ADVERTISE);
1145
1146 DBG(2, "%s: phy caps=%x\n", dev->name, my_phy_caps);
1147 DBG(2, "%s: phy advertised caps=%x\n", dev->name, my_ad_caps);
1148
1149 /* Restart auto-negotiation process in order to advertise my caps */
1150 smc_phy_write(dev, phyaddr, MII_BMCR, BMCR_ANENABLE | BMCR_ANRESTART);
1151
1152 smc_phy_check_media(dev, 1);
1153
1154smc_phy_configure_exit:
Magnus Dammcfdfa862008-02-22 19:55:05 +09001155 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 spin_unlock_irq(&lp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157}
1158
1159/*
1160 * smc_phy_interrupt
1161 *
1162 * Purpose: Handle interrupts relating to PHY register 18. This is
1163 * called from the "hard" interrupt handler under our private spinlock.
1164 */
1165static void smc_phy_interrupt(struct net_device *dev)
1166{
1167 struct smc_local *lp = netdev_priv(dev);
1168 int phyaddr = lp->mii.phy_id;
1169 int phy18;
1170
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001171 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
1173 if (lp->phy_type == 0)
1174 return;
1175
1176 for(;;) {
1177 smc_phy_check_media(dev, 0);
1178
1179 /* Read PHY Register 18, Status Output */
1180 phy18 = smc_phy_read(dev, phyaddr, PHY_INT_REG);
1181 if ((phy18 & PHY_INT_INT) == 0)
1182 break;
1183 }
1184}
1185
1186/*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1187
1188static void smc_10bt_check_media(struct net_device *dev, int init)
1189{
1190 struct smc_local *lp = netdev_priv(dev);
1191 void __iomem *ioaddr = lp->base;
1192 unsigned int old_carrier, new_carrier;
1193
1194 old_carrier = netif_carrier_ok(dev) ? 1 : 0;
1195
Magnus Dammcfdfa862008-02-22 19:55:05 +09001196 SMC_SELECT_BANK(lp, 0);
1197 new_carrier = (SMC_GET_EPH_STATUS(lp) & ES_LINK_OK) ? 1 : 0;
1198 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199
1200 if (init || (old_carrier != new_carrier)) {
1201 if (!new_carrier) {
1202 netif_carrier_off(dev);
1203 } else {
1204 netif_carrier_on(dev);
1205 }
1206 if (netif_msg_link(lp))
1207 printk(KERN_INFO "%s: link %s\n", dev->name,
1208 new_carrier ? "up" : "down");
1209 }
1210}
1211
1212static void smc_eph_interrupt(struct net_device *dev)
1213{
1214 struct smc_local *lp = netdev_priv(dev);
1215 void __iomem *ioaddr = lp->base;
1216 unsigned int ctl;
1217
1218 smc_10bt_check_media(dev, 0);
1219
Magnus Dammcfdfa862008-02-22 19:55:05 +09001220 SMC_SELECT_BANK(lp, 1);
1221 ctl = SMC_GET_CTL(lp);
1222 SMC_SET_CTL(lp, ctl & ~CTL_LE_ENABLE);
1223 SMC_SET_CTL(lp, ctl);
1224 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225}
1226
1227/*
1228 * This is the main routine of the driver, to handle the device when
1229 * it needs some attention.
1230 */
David Howells7d12e782006-10-05 14:55:46 +01001231static irqreturn_t smc_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232{
1233 struct net_device *dev = dev_id;
1234 struct smc_local *lp = netdev_priv(dev);
1235 void __iomem *ioaddr = lp->base;
1236 int status, mask, timeout, card_stats;
1237 int saved_pointer;
1238
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001239 DBG(3, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240
1241 spin_lock(&lp->lock);
1242
1243 /* A preamble may be used when there is a potential race
1244 * between the interruptible transmit functions and this
1245 * ISR. */
1246 SMC_INTERRUPT_PREAMBLE;
1247
Magnus Dammcfdfa862008-02-22 19:55:05 +09001248 saved_pointer = SMC_GET_PTR(lp);
1249 mask = SMC_GET_INT_MASK(lp);
1250 SMC_SET_INT_MASK(lp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251
1252 /* set a timeout value, so I don't stay here forever */
Nicolas Pitre5d0571d2005-11-17 14:02:48 -05001253 timeout = MAX_IRQ_LOOPS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
1255 do {
Magnus Dammcfdfa862008-02-22 19:55:05 +09001256 status = SMC_GET_INT(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257
1258 DBG(2, "%s: INT 0x%02x MASK 0x%02x MEM 0x%04x FIFO 0x%04x\n",
1259 dev->name, status, mask,
Magnus Dammcfdfa862008-02-22 19:55:05 +09001260 ({ int meminfo; SMC_SELECT_BANK(lp, 0);
1261 meminfo = SMC_GET_MIR(lp);
1262 SMC_SELECT_BANK(lp, 2); meminfo; }),
1263 SMC_GET_FIFO(lp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264
1265 status &= mask;
1266 if (!status)
1267 break;
1268
Nicolas Pitreea937562005-04-12 16:26:40 -04001269 if (status & IM_TX_INT) {
1270 /* do this before RX as it will free memory quickly */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 DBG(3, "%s: TX int\n", dev->name);
1272 smc_tx(dev);
Magnus Dammcfdfa862008-02-22 19:55:05 +09001273 SMC_ACK_INT(lp, IM_TX_INT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 if (THROTTLE_TX_PKTS)
1275 netif_wake_queue(dev);
Nicolas Pitreea937562005-04-12 16:26:40 -04001276 } else if (status & IM_RCV_INT) {
1277 DBG(3, "%s: RX irq\n", dev->name);
1278 smc_rcv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 } else if (status & IM_ALLOC_INT) {
1280 DBG(3, "%s: Allocation irq\n", dev->name);
1281 tasklet_hi_schedule(&lp->tx_task);
1282 mask &= ~IM_ALLOC_INT;
1283 } else if (status & IM_TX_EMPTY_INT) {
1284 DBG(3, "%s: TX empty\n", dev->name);
1285 mask &= ~IM_TX_EMPTY_INT;
1286
1287 /* update stats */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001288 SMC_SELECT_BANK(lp, 0);
1289 card_stats = SMC_GET_COUNTER(lp);
1290 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291
1292 /* single collisions */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001293 dev->stats.collisions += card_stats & 0xF;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 card_stats >>= 4;
1295
1296 /* multiple collisions */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001297 dev->stats.collisions += card_stats & 0xF;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 } else if (status & IM_RX_OVRN_INT) {
Nicolas Pitre8de90112005-04-12 16:21:11 -04001299 DBG(1, "%s: RX overrun (EPH_ST 0x%04x)\n", dev->name,
Magnus Dammcfdfa862008-02-22 19:55:05 +09001300 ({ int eph_st; SMC_SELECT_BANK(lp, 0);
1301 eph_st = SMC_GET_EPH_STATUS(lp);
1302 SMC_SELECT_BANK(lp, 2); eph_st; }));
1303 SMC_ACK_INT(lp, IM_RX_OVRN_INT);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001304 dev->stats.rx_errors++;
1305 dev->stats.rx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 } else if (status & IM_EPH_INT) {
1307 smc_eph_interrupt(dev);
1308 } else if (status & IM_MDINT) {
Magnus Dammcfdfa862008-02-22 19:55:05 +09001309 SMC_ACK_INT(lp, IM_MDINT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 smc_phy_interrupt(dev);
1311 } else if (status & IM_ERCV_INT) {
Magnus Dammcfdfa862008-02-22 19:55:05 +09001312 SMC_ACK_INT(lp, IM_ERCV_INT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 PRINTK("%s: UNSUPPORTED: ERCV INTERRUPT \n", dev->name);
1314 }
1315 } while (--timeout);
1316
1317 /* restore register states */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001318 SMC_SET_PTR(lp, saved_pointer);
1319 SMC_SET_INT_MASK(lp, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 spin_unlock(&lp->lock);
1321
Sonic Zhangc500cb22008-04-10 21:30:37 -07001322#ifndef CONFIG_NET_POLL_CONTROLLER
Nicolas Pitre5d0571d2005-11-17 14:02:48 -05001323 if (timeout == MAX_IRQ_LOOPS)
1324 PRINTK("%s: spurious interrupt (mask = 0x%02x)\n",
1325 dev->name, mask);
Sonic Zhangc500cb22008-04-10 21:30:37 -07001326#endif
Nicolas Pitre5d0571d2005-11-17 14:02:48 -05001327 DBG(3, "%s: Interrupt done (%d loops)\n",
1328 dev->name, MAX_IRQ_LOOPS - timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329
1330 /*
1331 * We return IRQ_HANDLED unconditionally here even if there was
1332 * nothing to do. There is a possibility that a packet might
1333 * get enqueued into the chip right after TX_EMPTY_INT is raised
1334 * but just before the CPU acknowledges the IRQ.
1335 * Better take an unneeded IRQ in some occasions than complexifying
1336 * the code for all cases.
1337 */
1338 return IRQ_HANDLED;
1339}
1340
1341#ifdef CONFIG_NET_POLL_CONTROLLER
1342/*
1343 * Polling receive - used by netconsole and other diagnostic tools
1344 * to allow network i/o with interrupts disabled.
1345 */
1346static void smc_poll_controller(struct net_device *dev)
1347{
1348 disable_irq(dev->irq);
Al Viro9c8e7f52006-10-07 16:29:18 +01001349 smc_interrupt(dev->irq, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 enable_irq(dev->irq);
1351}
1352#endif
1353
1354/* Our watchdog timed out. Called by the networking layer */
1355static void smc_timeout(struct net_device *dev)
1356{
1357 struct smc_local *lp = netdev_priv(dev);
1358 void __iomem *ioaddr = lp->base;
Nicolas Pitre8de90112005-04-12 16:21:11 -04001359 int status, mask, eph_st, meminfo, fifo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001361 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362
1363 spin_lock_irq(&lp->lock);
Magnus Dammcfdfa862008-02-22 19:55:05 +09001364 status = SMC_GET_INT(lp);
1365 mask = SMC_GET_INT_MASK(lp);
1366 fifo = SMC_GET_FIFO(lp);
1367 SMC_SELECT_BANK(lp, 0);
1368 eph_st = SMC_GET_EPH_STATUS(lp);
1369 meminfo = SMC_GET_MIR(lp);
1370 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 spin_unlock_irq(&lp->lock);
Nicolas Pitre8de90112005-04-12 16:21:11 -04001372 PRINTK( "%s: TX timeout (INT 0x%02x INTMASK 0x%02x "
1373 "MEM 0x%04x FIFO 0x%04x EPH_ST 0x%04x)\n",
1374 dev->name, status, mask, meminfo, fifo, eph_st );
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375
1376 smc_reset(dev);
1377 smc_enable(dev);
1378
1379 /*
1380 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1381 * smc_phy_configure() calls msleep() which calls schedule_timeout()
1382 * which calls schedule(). Hence we use a work queue.
1383 */
David S. Miller4bb073c2008-06-12 02:22:02 -07001384 if (lp->phy_type != 0)
1385 schedule_work(&lp->phy_configure);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
1387 /* We can accept TX packets again */
1388 dev->trans_start = jiffies;
1389 netif_wake_queue(dev);
1390}
1391
1392/*
1393 * This routine will, depending on the values passed to it,
1394 * either make it accept multicast packets, go into
1395 * promiscuous mode (for TCPDUMP and cousins) or accept
1396 * a select set of multicast packets
1397 */
1398static void smc_set_multicast_list(struct net_device *dev)
1399{
1400 struct smc_local *lp = netdev_priv(dev);
1401 void __iomem *ioaddr = lp->base;
1402 unsigned char multicast_table[8];
1403 int update_multicast = 0;
1404
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001405 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406
1407 if (dev->flags & IFF_PROMISC) {
1408 DBG(2, "%s: RCR_PRMS\n", dev->name);
1409 lp->rcr_cur_mode |= RCR_PRMS;
1410 }
1411
1412/* BUG? I never disable promiscuous mode if multicasting was turned on.
1413 Now, I turn off promiscuous mode, but I don't do anything to multicasting
1414 when promiscuous mode is turned on.
1415*/
1416
1417 /*
1418 * Here, I am setting this to accept all multicast packets.
1419 * I don't need to zero the multicast table, because the flag is
1420 * checked before the table is
1421 */
1422 else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) {
1423 DBG(2, "%s: RCR_ALMUL\n", dev->name);
1424 lp->rcr_cur_mode |= RCR_ALMUL;
1425 }
1426
1427 /*
1428 * This sets the internal hardware table to filter out unwanted
1429 * multicast packets before they take up memory.
1430 *
1431 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1432 * address are the offset into the table. If that bit is 1, then the
1433 * multicast packet is accepted. Otherwise, it's dropped silently.
1434 *
1435 * To use the 6 bits as an offset into the table, the high 3 bits are
1436 * the number of the 8 bit register, while the low 3 bits are the bit
1437 * within that register.
1438 */
1439 else if (dev->mc_count) {
1440 int i;
1441 struct dev_mc_list *cur_addr;
1442
1443 /* table for flipping the order of 3 bits */
1444 static const unsigned char invert3[] = {0, 4, 2, 6, 1, 5, 3, 7};
1445
1446 /* start with a table of all zeros: reject all */
1447 memset(multicast_table, 0, sizeof(multicast_table));
1448
1449 cur_addr = dev->mc_list;
1450 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
1451 int position;
1452
1453 /* do we have a pointer here? */
1454 if (!cur_addr)
1455 break;
1456 /* make sure this is a multicast address -
1457 shouldn't this be a given if we have it here ? */
1458 if (!(*cur_addr->dmi_addr & 1))
1459 continue;
1460
1461 /* only use the low order bits */
1462 position = crc32_le(~0, cur_addr->dmi_addr, 6) & 0x3f;
1463
1464 /* do some messy swapping to put the bit in the right spot */
1465 multicast_table[invert3[position&7]] |=
1466 (1<<invert3[(position>>3)&7]);
1467 }
1468
1469 /* be sure I get rid of flags I might have set */
1470 lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL);
1471
1472 /* now, the table can be loaded into the chipset */
1473 update_multicast = 1;
1474 } else {
1475 DBG(2, "%s: ~(RCR_PRMS|RCR_ALMUL)\n", dev->name);
1476 lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL);
1477
1478 /*
1479 * since I'm disabling all multicast entirely, I need to
1480 * clear the multicast list
1481 */
1482 memset(multicast_table, 0, sizeof(multicast_table));
1483 update_multicast = 1;
1484 }
1485
1486 spin_lock_irq(&lp->lock);
Magnus Dammcfdfa862008-02-22 19:55:05 +09001487 SMC_SELECT_BANK(lp, 0);
1488 SMC_SET_RCR(lp, lp->rcr_cur_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489 if (update_multicast) {
Magnus Dammcfdfa862008-02-22 19:55:05 +09001490 SMC_SELECT_BANK(lp, 3);
1491 SMC_SET_MCAST(lp, multicast_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492 }
Magnus Dammcfdfa862008-02-22 19:55:05 +09001493 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494 spin_unlock_irq(&lp->lock);
1495}
1496
1497
1498/*
1499 * Open and Initialize the board
1500 *
1501 * Set up everything, reset the card, etc..
1502 */
1503static int
1504smc_open(struct net_device *dev)
1505{
1506 struct smc_local *lp = netdev_priv(dev);
1507
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001508 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509
1510 /*
1511 * Check that the address is valid. If its not, refuse
1512 * to bring the device up. The user must specify an
1513 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1514 */
1515 if (!is_valid_ether_addr(dev->dev_addr)) {
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001516 PRINTK("%s: no valid ethernet hw addr\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517 return -EINVAL;
1518 }
1519
1520 /* Setup the default Register Modes */
1521 lp->tcr_cur_mode = TCR_DEFAULT;
1522 lp->rcr_cur_mode = RCR_DEFAULT;
Russell Kingb0dbcf52008-09-04 21:13:37 +01001523 lp->rpc_cur_mode = RPC_DEFAULT |
1524 lp->cfg.leda << RPC_LSXA_SHFT |
1525 lp->cfg.ledb << RPC_LSXB_SHFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526
1527 /*
1528 * If we are not using a MII interface, we need to
1529 * monitor our own carrier signal to detect faults.
1530 */
1531 if (lp->phy_type == 0)
1532 lp->tcr_cur_mode |= TCR_MON_CSN;
1533
1534 /* reset the hardware */
1535 smc_reset(dev);
1536 smc_enable(dev);
1537
1538 /* Configure the PHY, initialize the link state */
1539 if (lp->phy_type != 0)
David Howells6d5aefb2006-12-05 19:36:26 +00001540 smc_phy_configure(&lp->phy_configure);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541 else {
1542 spin_lock_irq(&lp->lock);
1543 smc_10bt_check_media(dev, 1);
1544 spin_unlock_irq(&lp->lock);
1545 }
1546
1547 netif_start_queue(dev);
1548 return 0;
1549}
1550
1551/*
1552 * smc_close
1553 *
1554 * this makes the board clean up everything that it can
1555 * and not talk to the outside world. Caused by
1556 * an 'ifconfig ethX down'
1557 */
1558static int smc_close(struct net_device *dev)
1559{
1560 struct smc_local *lp = netdev_priv(dev);
1561
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001562 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563
1564 netif_stop_queue(dev);
1565 netif_carrier_off(dev);
1566
1567 /* clear everything */
1568 smc_shutdown(dev);
Nicolas Pitrebe836682005-06-19 23:56:21 -04001569 tasklet_kill(&lp->tx_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 smc_phy_powerdown(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571 return 0;
1572}
1573
1574/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 * Ethtool support
1576 */
1577static int
1578smc_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1579{
1580 struct smc_local *lp = netdev_priv(dev);
1581 int ret;
1582
1583 cmd->maxtxpkt = 1;
1584 cmd->maxrxpkt = 1;
1585
1586 if (lp->phy_type != 0) {
1587 spin_lock_irq(&lp->lock);
1588 ret = mii_ethtool_gset(&lp->mii, cmd);
1589 spin_unlock_irq(&lp->lock);
1590 } else {
1591 cmd->supported = SUPPORTED_10baseT_Half |
1592 SUPPORTED_10baseT_Full |
1593 SUPPORTED_TP | SUPPORTED_AUI;
1594
1595 if (lp->ctl_rspeed == 10)
1596 cmd->speed = SPEED_10;
1597 else if (lp->ctl_rspeed == 100)
1598 cmd->speed = SPEED_100;
1599
1600 cmd->autoneg = AUTONEG_DISABLE;
1601 cmd->transceiver = XCVR_INTERNAL;
1602 cmd->port = 0;
1603 cmd->duplex = lp->tcr_cur_mode & TCR_SWFDUP ? DUPLEX_FULL : DUPLEX_HALF;
1604
1605 ret = 0;
1606 }
1607
1608 return ret;
1609}
1610
1611static int
1612smc_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1613{
1614 struct smc_local *lp = netdev_priv(dev);
1615 int ret;
1616
1617 if (lp->phy_type != 0) {
1618 spin_lock_irq(&lp->lock);
1619 ret = mii_ethtool_sset(&lp->mii, cmd);
1620 spin_unlock_irq(&lp->lock);
1621 } else {
1622 if (cmd->autoneg != AUTONEG_DISABLE ||
1623 cmd->speed != SPEED_10 ||
1624 (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1625 (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1626 return -EINVAL;
1627
1628// lp->port = cmd->port;
1629 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1630
1631// if (netif_running(dev))
1632// smc_set_port(dev);
1633
1634 ret = 0;
1635 }
1636
1637 return ret;
1638}
1639
1640static void
1641smc_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1642{
1643 strncpy(info->driver, CARDNAME, sizeof(info->driver));
1644 strncpy(info->version, version, sizeof(info->version));
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001645 strncpy(info->bus_info, dev->dev.parent->bus_id, sizeof(info->bus_info));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646}
1647
1648static int smc_ethtool_nwayreset(struct net_device *dev)
1649{
1650 struct smc_local *lp = netdev_priv(dev);
1651 int ret = -EINVAL;
1652
1653 if (lp->phy_type != 0) {
1654 spin_lock_irq(&lp->lock);
1655 ret = mii_nway_restart(&lp->mii);
1656 spin_unlock_irq(&lp->lock);
1657 }
1658
1659 return ret;
1660}
1661
1662static u32 smc_ethtool_getmsglevel(struct net_device *dev)
1663{
1664 struct smc_local *lp = netdev_priv(dev);
1665 return lp->msg_enable;
1666}
1667
1668static void smc_ethtool_setmsglevel(struct net_device *dev, u32 level)
1669{
1670 struct smc_local *lp = netdev_priv(dev);
1671 lp->msg_enable = level;
1672}
1673
Jeff Garzik7282d492006-09-13 14:30:00 -04001674static const struct ethtool_ops smc_ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675 .get_settings = smc_ethtool_getsettings,
1676 .set_settings = smc_ethtool_setsettings,
1677 .get_drvinfo = smc_ethtool_getdrvinfo,
1678
1679 .get_msglevel = smc_ethtool_getmsglevel,
1680 .set_msglevel = smc_ethtool_setmsglevel,
1681 .nway_reset = smc_ethtool_nwayreset,
1682 .get_link = ethtool_op_get_link,
1683// .get_eeprom = smc_ethtool_geteeprom,
1684// .set_eeprom = smc_ethtool_seteeprom,
1685};
1686
1687/*
1688 * smc_findirq
1689 *
1690 * This routine has a simple purpose -- make the SMC chip generate an
1691 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1692 */
1693/*
1694 * does this still work?
1695 *
1696 * I just deleted auto_irq.c, since it was never built...
1697 * --jgarzik
1698 */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001699static int __init smc_findirq(struct smc_local *lp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700{
Magnus Dammcfdfa862008-02-22 19:55:05 +09001701 void __iomem *ioaddr = lp->base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702 int timeout = 20;
1703 unsigned long cookie;
1704
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001705 DBG(2, "%s: %s\n", CARDNAME, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706
1707 cookie = probe_irq_on();
1708
1709 /*
1710 * What I try to do here is trigger an ALLOC_INT. This is done
1711 * by allocating a small chunk of memory, which will give an interrupt
1712 * when done.
1713 */
1714 /* enable ALLOCation interrupts ONLY */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001715 SMC_SELECT_BANK(lp, 2);
1716 SMC_SET_INT_MASK(lp, IM_ALLOC_INT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717
1718 /*
1719 * Allocate 512 bytes of memory. Note that the chip was just
1720 * reset so all the memory is available
1721 */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001722 SMC_SET_MMU_CMD(lp, MC_ALLOC | 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723
1724 /*
1725 * Wait until positive that the interrupt has been generated
1726 */
1727 do {
1728 int int_status;
1729 udelay(10);
Magnus Dammcfdfa862008-02-22 19:55:05 +09001730 int_status = SMC_GET_INT(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 if (int_status & IM_ALLOC_INT)
1732 break; /* got the interrupt */
1733 } while (--timeout);
1734
1735 /*
1736 * there is really nothing that I can do here if timeout fails,
1737 * as autoirq_report will return a 0 anyway, which is what I
1738 * want in this case. Plus, the clean up is needed in both
1739 * cases.
1740 */
1741
1742 /* and disable all interrupts again */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001743 SMC_SET_INT_MASK(lp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744
1745 /* and return what I found */
1746 return probe_irq_off(cookie);
1747}
1748
1749/*
1750 * Function: smc_probe(unsigned long ioaddr)
1751 *
1752 * Purpose:
1753 * Tests to see if a given ioaddr points to an SMC91x chip.
1754 * Returns a 0 on success
1755 *
1756 * Algorithm:
1757 * (1) see if the high byte of BANK_SELECT is 0x33
1758 * (2) compare the ioaddr with the base register's address
1759 * (3) see if I recognize the chip ID in the appropriate register
1760 *
1761 * Here I do typical initialization tasks.
1762 *
1763 * o Initialize the structure if needed
1764 * o print out my vanity message if not done so already
1765 * o print out what type of hardware is detected
1766 * o print out the ethernet address
1767 * o find the IRQ
1768 * o set up my private data
1769 * o configure the dev structure with my subroutines
1770 * o actually GRAB the irq.
1771 * o GRAB the region
1772 */
Russell Kinge7b3dc72008-01-14 22:30:10 +00001773static int __init smc_probe(struct net_device *dev, void __iomem *ioaddr,
1774 unsigned long irq_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775{
1776 struct smc_local *lp = netdev_priv(dev);
1777 static int version_printed = 0;
Joe Perches0795af52007-10-03 17:59:30 -07001778 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779 unsigned int val, revision_register;
1780 const char *version_string;
Joe Perches0795af52007-10-03 17:59:30 -07001781 DECLARE_MAC_BUF(mac);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001783 DBG(2, "%s: %s\n", CARDNAME, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784
1785 /* First, see if the high byte is 0x33 */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001786 val = SMC_CURRENT_BANK(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787 DBG(2, "%s: bank signature probe returned 0x%04x\n", CARDNAME, val);
1788 if ((val & 0xFF00) != 0x3300) {
1789 if ((val & 0xFF) == 0x33) {
1790 printk(KERN_WARNING
1791 "%s: Detected possible byte-swapped interface"
1792 " at IOADDR %p\n", CARDNAME, ioaddr);
1793 }
1794 retval = -ENODEV;
1795 goto err_out;
1796 }
1797
1798 /*
1799 * The above MIGHT indicate a device, but I need to write to
1800 * further test this.
1801 */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001802 SMC_SELECT_BANK(lp, 0);
1803 val = SMC_CURRENT_BANK(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804 if ((val & 0xFF00) != 0x3300) {
1805 retval = -ENODEV;
1806 goto err_out;
1807 }
1808
1809 /*
1810 * well, we've already written once, so hopefully another
1811 * time won't hurt. This time, I need to switch the bank
1812 * register to bank 1, so I can access the base address
1813 * register
1814 */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001815 SMC_SELECT_BANK(lp, 1);
1816 val = SMC_GET_BASE(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817 val = ((val & 0x1F00) >> 3) << SMC_IO_SHIFT;
Nicolas Pitre53155102005-05-12 20:18:19 -04001818 if (((unsigned int)ioaddr & (0x3e0 << SMC_IO_SHIFT)) != val) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001819 printk("%s: IOADDR %p doesn't match configuration (%x).\n",
1820 CARDNAME, ioaddr, val);
1821 }
1822
1823 /*
1824 * check if the revision register is something that I
1825 * recognize. These might need to be added to later,
1826 * as future revisions could be added.
1827 */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001828 SMC_SELECT_BANK(lp, 3);
1829 revision_register = SMC_GET_REV(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001830 DBG(2, "%s: revision = 0x%04x\n", CARDNAME, revision_register);
1831 version_string = chip_ids[ (revision_register >> 4) & 0xF];
1832 if (!version_string || (revision_register & 0xff00) != 0x3300) {
1833 /* I don't recognize this chip, so... */
1834 printk("%s: IO %p: Unrecognized revision register 0x%04x"
1835 ", Contact author.\n", CARDNAME,
1836 ioaddr, revision_register);
1837
1838 retval = -ENODEV;
1839 goto err_out;
1840 }
1841
1842 /* At this point I'll assume that the chip is an SMC91x. */
1843 if (version_printed++ == 0)
1844 printk("%s", version);
1845
1846 /* fill in some of the fields */
1847 dev->base_addr = (unsigned long)ioaddr;
1848 lp->base = ioaddr;
1849 lp->version = revision_register & 0xff;
1850 spin_lock_init(&lp->lock);
1851
1852 /* Get the MAC address */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001853 SMC_SELECT_BANK(lp, 1);
1854 SMC_GET_MAC_ADDR(lp, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855
1856 /* now, reset the chip, and put it into a known state */
1857 smc_reset(dev);
1858
1859 /*
1860 * If dev->irq is 0, then the device has to be banged on to see
1861 * what the IRQ is.
1862 *
1863 * This banging doesn't always detect the IRQ, for unknown reasons.
1864 * a workaround is to reset the chip and try again.
1865 *
1866 * Interestingly, the DOS packet driver *SETS* the IRQ on the card to
1867 * be what is requested on the command line. I don't do that, mostly
1868 * because the card that I have uses a non-standard method of accessing
1869 * the IRQs, and because this _should_ work in most configurations.
1870 *
1871 * Specifying an IRQ is done with the assumption that the user knows
1872 * what (s)he is doing. No checking is done!!!!
1873 */
1874 if (dev->irq < 1) {
1875 int trials;
1876
1877 trials = 3;
1878 while (trials--) {
Magnus Dammcfdfa862008-02-22 19:55:05 +09001879 dev->irq = smc_findirq(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880 if (dev->irq)
1881 break;
1882 /* kick the card and try again */
1883 smc_reset(dev);
1884 }
1885 }
1886 if (dev->irq == 0) {
1887 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
1888 dev->name);
1889 retval = -ENODEV;
1890 goto err_out;
1891 }
1892 dev->irq = irq_canonicalize(dev->irq);
1893
1894 /* Fill in the fields of the device structure with ethernet values. */
1895 ether_setup(dev);
1896
1897 dev->open = smc_open;
1898 dev->stop = smc_close;
1899 dev->hard_start_xmit = smc_hard_start_xmit;
1900 dev->tx_timeout = smc_timeout;
1901 dev->watchdog_timeo = msecs_to_jiffies(watchdog);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902 dev->set_multicast_list = smc_set_multicast_list;
1903 dev->ethtool_ops = &smc_ethtool_ops;
1904#ifdef CONFIG_NET_POLL_CONTROLLER
1905 dev->poll_controller = smc_poll_controller;
1906#endif
1907
1908 tasklet_init(&lp->tx_task, smc_hardware_send_pkt, (unsigned long)dev);
David Howells6d5aefb2006-12-05 19:36:26 +00001909 INIT_WORK(&lp->phy_configure, smc_phy_configure);
1910 lp->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 lp->mii.phy_id_mask = 0x1f;
1912 lp->mii.reg_num_mask = 0x1f;
1913 lp->mii.force_media = 0;
1914 lp->mii.full_duplex = 0;
1915 lp->mii.dev = dev;
1916 lp->mii.mdio_read = smc_phy_read;
1917 lp->mii.mdio_write = smc_phy_write;
1918
1919 /*
1920 * Locate the phy, if any.
1921 */
1922 if (lp->version >= (CHIP_91100 << 4))
1923 smc_phy_detect(dev);
1924
Nicolas Pitre99e1baf2005-10-05 11:10:24 -04001925 /* then shut everything down to save power */
1926 smc_shutdown(dev);
1927 smc_phy_powerdown(dev);
1928
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929 /* Set default parameters */
1930 lp->msg_enable = NETIF_MSG_LINK;
1931 lp->ctl_rfduplx = 0;
1932 lp->ctl_rspeed = 10;
1933
1934 if (lp->version >= (CHIP_91100 << 4)) {
1935 lp->ctl_rfduplx = 1;
1936 lp->ctl_rspeed = 100;
1937 }
1938
1939 /* Grab the IRQ */
Russell Kinge7b3dc72008-01-14 22:30:10 +00001940 retval = request_irq(dev->irq, &smc_interrupt, irq_flags, dev->name, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 if (retval)
1942 goto err_out;
1943
Eric Miao52256c02008-06-24 15:36:05 +08001944#ifdef CONFIG_ARCH_PXA
1945# ifdef SMC_USE_PXA_DMA
1946 lp->cfg.flags |= SMC91X_USE_DMA;
1947# endif
1948 if (lp->cfg.flags & SMC91X_USE_DMA) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949 int dma = pxa_request_dma(dev->name, DMA_PRIO_LOW,
1950 smc_pxa_dma_irq, NULL);
1951 if (dma >= 0)
1952 dev->dma = dma;
1953 }
1954#endif
1955
1956 retval = register_netdev(dev);
1957 if (retval == 0) {
1958 /* now, print out the card info, in a short format.. */
1959 printk("%s: %s (rev %d) at %p IRQ %d",
1960 dev->name, version_string, revision_register & 0x0f,
1961 lp->base, dev->irq);
1962
1963 if (dev->dma != (unsigned char)-1)
1964 printk(" DMA %d", dev->dma);
1965
Magnus Dammd6bc3722008-09-08 14:02:56 +09001966 printk("%s%s\n",
1967 lp->cfg.flags & SMC91X_NOWAIT ? " [nowait]" : "",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968 THROTTLE_TX_PKTS ? " [throttle_tx]" : "");
1969
1970 if (!is_valid_ether_addr(dev->dev_addr)) {
1971 printk("%s: Invalid ethernet MAC address. Please "
1972 "set using ifconfig\n", dev->name);
1973 } else {
1974 /* Print the Ethernet address */
Joe Perches0795af52007-10-03 17:59:30 -07001975 printk("%s: Ethernet addr: %s\n",
1976 dev->name, print_mac(mac, dev->dev_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 }
1978
1979 if (lp->phy_type == 0) {
1980 PRINTK("%s: No PHY found\n", dev->name);
1981 } else if ((lp->phy_type & 0xfffffff0) == 0x0016f840) {
1982 PRINTK("%s: PHY LAN83C183 (LAN91C111 Internal)\n", dev->name);
1983 } else if ((lp->phy_type & 0xfffffff0) == 0x02821c50) {
1984 PRINTK("%s: PHY LAN83C180\n", dev->name);
1985 }
1986 }
1987
1988err_out:
Eric Miao52256c02008-06-24 15:36:05 +08001989#ifdef CONFIG_ARCH_PXA
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990 if (retval && dev->dma != (unsigned char)-1)
1991 pxa_free_dma(dev->dma);
1992#endif
1993 return retval;
1994}
1995
1996static int smc_enable_device(struct platform_device *pdev)
1997{
Magnus Damm3e947942008-02-22 19:55:15 +09001998 struct net_device *ndev = platform_get_drvdata(pdev);
1999 struct smc_local *lp = netdev_priv(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000 unsigned long flags;
2001 unsigned char ecor, ecsr;
2002 void __iomem *addr;
2003 struct resource * res;
2004
2005 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2006 if (!res)
2007 return 0;
2008
2009 /*
2010 * Map the attribute space. This is overkill, but clean.
2011 */
2012 addr = ioremap(res->start, ATTRIB_SIZE);
2013 if (!addr)
2014 return -ENOMEM;
2015
2016 /*
2017 * Reset the device. We must disable IRQs around this
2018 * since a reset causes the IRQ line become active.
2019 */
2020 local_irq_save(flags);
2021 ecor = readb(addr + (ECOR << SMC_IO_SHIFT)) & ~ECOR_RESET;
2022 writeb(ecor | ECOR_RESET, addr + (ECOR << SMC_IO_SHIFT));
2023 readb(addr + (ECOR << SMC_IO_SHIFT));
2024
2025 /*
2026 * Wait 100us for the chip to reset.
2027 */
2028 udelay(100);
2029
2030 /*
2031 * The device will ignore all writes to the enable bit while
2032 * reset is asserted, even if the reset bit is cleared in the
2033 * same write. Must clear reset first, then enable the device.
2034 */
2035 writeb(ecor, addr + (ECOR << SMC_IO_SHIFT));
2036 writeb(ecor | ECOR_ENABLE, addr + (ECOR << SMC_IO_SHIFT));
2037
2038 /*
2039 * Set the appropriate byte/word mode.
2040 */
2041 ecsr = readb(addr + (ECSR << SMC_IO_SHIFT)) & ~ECSR_IOIS8;
Magnus Damm3e947942008-02-22 19:55:15 +09002042 if (!SMC_16BIT(lp))
Nicolas Pitre09779c62006-03-20 11:54:27 -05002043 ecsr |= ECSR_IOIS8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044 writeb(ecsr, addr + (ECSR << SMC_IO_SHIFT));
2045 local_irq_restore(flags);
2046
2047 iounmap(addr);
2048
2049 /*
2050 * Wait for the chip to wake up. We could poll the control
2051 * register in the main register space, but that isn't mapped
2052 * yet. We know this is going to take 750us.
2053 */
2054 msleep(1);
2055
2056 return 0;
2057}
2058
Eric Miao15919882008-06-24 13:38:50 +08002059static int smc_request_attrib(struct platform_device *pdev,
2060 struct net_device *ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061{
2062 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
David S. Miller55c8eb62008-11-03 00:04:24 -08002063 struct smc_local *lp __maybe_unused = netdev_priv(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064
2065 if (!res)
2066 return 0;
2067
2068 if (!request_mem_region(res->start, ATTRIB_SIZE, CARDNAME))
2069 return -EBUSY;
2070
2071 return 0;
2072}
2073
Eric Miao15919882008-06-24 13:38:50 +08002074static void smc_release_attrib(struct platform_device *pdev,
2075 struct net_device *ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076{
2077 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
David S. Miller55c8eb62008-11-03 00:04:24 -08002078 struct smc_local *lp __maybe_unused = netdev_priv(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079
2080 if (res)
2081 release_mem_region(res->start, ATTRIB_SIZE);
2082}
2083
Nicolas Pitre09779c62006-03-20 11:54:27 -05002084static inline void smc_request_datacs(struct platform_device *pdev, struct net_device *ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085{
Nicolas Pitre09779c62006-03-20 11:54:27 -05002086 if (SMC_CAN_USE_DATACS) {
2087 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32");
2088 struct smc_local *lp = netdev_priv(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089
Nicolas Pitre09779c62006-03-20 11:54:27 -05002090 if (!res)
2091 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002092
Nicolas Pitre09779c62006-03-20 11:54:27 -05002093 if(!request_mem_region(res->start, SMC_DATA_EXTENT, CARDNAME)) {
2094 printk(KERN_INFO "%s: failed to request datacs memory region.\n", CARDNAME);
2095 return;
2096 }
2097
2098 lp->datacs = ioremap(res->start, SMC_DATA_EXTENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100}
2101
2102static void smc_release_datacs(struct platform_device *pdev, struct net_device *ndev)
2103{
Nicolas Pitre09779c62006-03-20 11:54:27 -05002104 if (SMC_CAN_USE_DATACS) {
2105 struct smc_local *lp = netdev_priv(ndev);
2106 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107
Nicolas Pitre09779c62006-03-20 11:54:27 -05002108 if (lp->datacs)
2109 iounmap(lp->datacs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110
Nicolas Pitre09779c62006-03-20 11:54:27 -05002111 lp->datacs = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112
Nicolas Pitre09779c62006-03-20 11:54:27 -05002113 if (res)
2114 release_mem_region(res->start, SMC_DATA_EXTENT);
2115 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117
2118/*
2119 * smc_init(void)
2120 * Input parameters:
2121 * dev->base_addr == 0, try to find all possible locations
2122 * dev->base_addr > 0x1ff, this is the address to check
2123 * dev->base_addr == <anything else>, return failure code
2124 *
2125 * Output:
2126 * 0 --> there is a device
2127 * anything else, error
2128 */
Russell King3ae5eae2005-11-09 22:32:44 +00002129static int smc_drv_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002130{
Magnus Damm3e947942008-02-22 19:55:15 +09002131 struct smc91x_platdata *pd = pdev->dev.platform_data;
2132 struct smc_local *lp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133 struct net_device *ndev;
Russell Kinge7b3dc72008-01-14 22:30:10 +00002134 struct resource *res, *ires;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 unsigned int __iomem *addr;
Eric Miaod280ead2008-06-06 17:13:02 +08002136 unsigned long irq_flags = SMC_IRQ_FLAGS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137 int ret;
2138
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139 ndev = alloc_etherdev(sizeof(struct smc_local));
2140 if (!ndev) {
2141 printk("%s: could not allocate device.\n", CARDNAME);
2142 ret = -ENOMEM;
Eric Miao15919882008-06-24 13:38:50 +08002143 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002144 }
Russell King3ae5eae2005-11-09 22:32:44 +00002145 SET_NETDEV_DEV(ndev, &pdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002146
Magnus Damm3e947942008-02-22 19:55:15 +09002147 /* get configuration from platform data, only allow use of
2148 * bus width if both SMC_CAN_USE_xxx and SMC91X_USE_xxx are set.
2149 */
2150
2151 lp = netdev_priv(ndev);
Magnus Damm3e947942008-02-22 19:55:15 +09002152
Eric Miao15919882008-06-24 13:38:50 +08002153 if (pd) {
Magnus Damm3e947942008-02-22 19:55:15 +09002154 memcpy(&lp->cfg, pd, sizeof(lp->cfg));
Eric Miao15919882008-06-24 13:38:50 +08002155 lp->io_shift = SMC91X_IO_SHIFT(lp->cfg.flags);
2156 } else {
Eric Miaofa6d3be2008-06-19 17:19:57 +08002157 lp->cfg.flags |= (SMC_CAN_USE_8BIT) ? SMC91X_USE_8BIT : 0;
2158 lp->cfg.flags |= (SMC_CAN_USE_16BIT) ? SMC91X_USE_16BIT : 0;
2159 lp->cfg.flags |= (SMC_CAN_USE_32BIT) ? SMC91X_USE_32BIT : 0;
Eric Miaoc4f0e762008-06-19 17:39:03 +08002160 lp->cfg.flags |= (nowait) ? SMC91X_NOWAIT : 0;
Magnus Damm3e947942008-02-22 19:55:15 +09002161 }
2162
Russell Kingb0dbcf52008-09-04 21:13:37 +01002163 if (!lp->cfg.leda && !lp->cfg.ledb) {
2164 lp->cfg.leda = RPC_LSA_DEFAULT;
2165 lp->cfg.ledb = RPC_LSB_DEFAULT;
2166 }
2167
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168 ndev->dma = (unsigned char)-1;
Russell Kinge7b3dc72008-01-14 22:30:10 +00002169
Eric Miao15919882008-06-24 13:38:50 +08002170 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
2171 if (!res)
2172 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2173 if (!res) {
2174 ret = -ENODEV;
2175 goto out_free_netdev;
2176 }
2177
2178
2179 if (!request_mem_region(res->start, SMC_IO_EXTENT, CARDNAME)) {
2180 ret = -EBUSY;
2181 goto out_free_netdev;
2182 }
2183
Russell Kinge7b3dc72008-01-14 22:30:10 +00002184 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2185 if (!ires) {
David Vrabel48944732006-01-19 17:56:29 +00002186 ret = -ENODEV;
Eric Miao15919882008-06-24 13:38:50 +08002187 goto out_release_io;
David Vrabel48944732006-01-19 17:56:29 +00002188 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189
Russell Kinge7b3dc72008-01-14 22:30:10 +00002190 ndev->irq = ires->start;
Eric Miaod280ead2008-06-06 17:13:02 +08002191
2192 if (ires->flags & IRQF_TRIGGER_MASK)
2193 irq_flags = ires->flags & IRQF_TRIGGER_MASK;
Russell Kinge7b3dc72008-01-14 22:30:10 +00002194
Eric Miao15919882008-06-24 13:38:50 +08002195 ret = smc_request_attrib(pdev, ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196 if (ret)
Eric Miao15919882008-06-24 13:38:50 +08002197 goto out_release_io;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198#if defined(CONFIG_SA1100_ASSABET)
2199 NCR_0 |= NCR_ENET_OSC_EN;
2200#endif
Magnus Damm3e947942008-02-22 19:55:15 +09002201 platform_set_drvdata(pdev, ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202 ret = smc_enable_device(pdev);
2203 if (ret)
2204 goto out_release_attrib;
2205
2206 addr = ioremap(res->start, SMC_IO_EXTENT);
2207 if (!addr) {
2208 ret = -ENOMEM;
2209 goto out_release_attrib;
2210 }
2211
Eric Miao52256c02008-06-24 15:36:05 +08002212#ifdef CONFIG_ARCH_PXA
Russell King073ac8f2007-09-01 21:27:18 +01002213 {
2214 struct smc_local *lp = netdev_priv(ndev);
2215 lp->device = &pdev->dev;
2216 lp->physaddr = res->start;
2217 }
2218#endif
2219
Eric Miaod280ead2008-06-06 17:13:02 +08002220 ret = smc_probe(ndev, addr, irq_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221 if (ret != 0)
2222 goto out_iounmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223
2224 smc_request_datacs(pdev, ndev);
2225
2226 return 0;
2227
2228 out_iounmap:
Russell King3ae5eae2005-11-09 22:32:44 +00002229 platform_set_drvdata(pdev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002230 iounmap(addr);
2231 out_release_attrib:
Eric Miao15919882008-06-24 13:38:50 +08002232 smc_release_attrib(pdev, ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002233 out_release_io:
2234 release_mem_region(res->start, SMC_IO_EXTENT);
Eric Miao15919882008-06-24 13:38:50 +08002235 out_free_netdev:
2236 free_netdev(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002237 out:
2238 printk("%s: not found (%d).\n", CARDNAME, ret);
2239
2240 return ret;
2241}
2242
Russell King3ae5eae2005-11-09 22:32:44 +00002243static int smc_drv_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002244{
Russell King3ae5eae2005-11-09 22:32:44 +00002245 struct net_device *ndev = platform_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246 struct smc_local *lp = netdev_priv(ndev);
2247 struct resource *res;
2248
Russell King3ae5eae2005-11-09 22:32:44 +00002249 platform_set_drvdata(pdev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002250
2251 unregister_netdev(ndev);
2252
2253 free_irq(ndev->irq, ndev);
2254
Eric Miao52256c02008-06-24 15:36:05 +08002255#ifdef CONFIG_ARCH_PXA
Linus Torvalds1da177e2005-04-16 15:20:36 -07002256 if (ndev->dma != (unsigned char)-1)
2257 pxa_free_dma(ndev->dma);
2258#endif
2259 iounmap(lp->base);
2260
2261 smc_release_datacs(pdev,ndev);
Eric Miao15919882008-06-24 13:38:50 +08002262 smc_release_attrib(pdev,ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263
2264 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
2265 if (!res)
Jeff Garzik6fc30db2008-08-27 05:54:30 -04002266 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002267 release_mem_region(res->start, SMC_IO_EXTENT);
2268
2269 free_netdev(ndev);
2270
2271 return 0;
2272}
2273
Russell King3ae5eae2005-11-09 22:32:44 +00002274static int smc_drv_suspend(struct platform_device *dev, pm_message_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002275{
Russell King3ae5eae2005-11-09 22:32:44 +00002276 struct net_device *ndev = platform_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277
Russell King9480e302005-10-28 09:52:56 -07002278 if (ndev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002279 if (netif_running(ndev)) {
2280 netif_device_detach(ndev);
2281 smc_shutdown(ndev);
2282 smc_phy_powerdown(ndev);
2283 }
2284 }
2285 return 0;
2286}
2287
Russell King3ae5eae2005-11-09 22:32:44 +00002288static int smc_drv_resume(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289{
Russell King3ae5eae2005-11-09 22:32:44 +00002290 struct net_device *ndev = platform_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002291
Russell King9480e302005-10-28 09:52:56 -07002292 if (ndev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293 struct smc_local *lp = netdev_priv(ndev);
Russell King3ae5eae2005-11-09 22:32:44 +00002294 smc_enable_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 if (netif_running(ndev)) {
2296 smc_reset(ndev);
2297 smc_enable(ndev);
2298 if (lp->phy_type != 0)
David Howells6d5aefb2006-12-05 19:36:26 +00002299 smc_phy_configure(&lp->phy_configure);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002300 netif_device_attach(ndev);
2301 }
2302 }
2303 return 0;
2304}
2305
Russell King3ae5eae2005-11-09 22:32:44 +00002306static struct platform_driver smc_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307 .probe = smc_drv_probe,
2308 .remove = smc_drv_remove,
2309 .suspend = smc_drv_suspend,
2310 .resume = smc_drv_resume,
Russell King3ae5eae2005-11-09 22:32:44 +00002311 .driver = {
2312 .name = CARDNAME,
Kay Sievers72abb462008-04-18 13:50:44 -07002313 .owner = THIS_MODULE,
Russell King3ae5eae2005-11-09 22:32:44 +00002314 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07002315};
2316
2317static int __init smc_init(void)
2318{
2319#ifdef MODULE
2320#ifdef CONFIG_ISA
2321 if (io == -1)
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002322 printk(KERN_WARNING
Linus Torvalds1da177e2005-04-16 15:20:36 -07002323 "%s: You shouldn't use auto-probing with insmod!\n",
2324 CARDNAME);
2325#endif
2326#endif
2327
Russell King3ae5eae2005-11-09 22:32:44 +00002328 return platform_driver_register(&smc_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329}
2330
2331static void __exit smc_cleanup(void)
2332{
Russell King3ae5eae2005-11-09 22:32:44 +00002333 platform_driver_unregister(&smc_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002334}
2335
2336module_init(smc_init);
2337module_exit(smc_cleanup);