blob: 1c70e999cc50d866ab5ebdba0956b25bba83659d [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
Linus Torvalds1da177e2005-04-16 15:20:36 -070093#ifndef SMC_NOWAIT
94# define SMC_NOWAIT 0
95#endif
96static int nowait = SMC_NOWAIT;
97module_param(nowait, int, 0400);
98MODULE_PARM_DESC(nowait, "set to 1 for no wait state");
99
100/*
101 * Transmit timeout, default 5 seconds.
102 */
Nicolas Pitreea937562005-04-12 16:26:40 -0400103static int watchdog = 1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104module_param(watchdog, int, 0400);
105MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
106
107MODULE_LICENSE("GPL");
Kay Sievers72abb462008-04-18 13:50:44 -0700108MODULE_ALIAS("platform:smc91x");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
110/*
111 * The internal workings of the driver. If you are changing anything
112 * here with the SMC stuff, you should have the datasheet and know
113 * what you are doing.
114 */
115#define CARDNAME "smc91x"
116
117/*
118 * Use power-down feature of the chip
119 */
120#define POWER_DOWN 1
121
122/*
123 * Wait time for memory to be free. This probably shouldn't be
124 * tuned that much, as waiting for this means nothing else happens
125 * in the system
126 */
127#define MEMORY_WAIT_TIME 16
128
129/*
Nicolas Pitre5d0571d2005-11-17 14:02:48 -0500130 * The maximum number of processing loops allowed for each call to the
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400131 * IRQ handler.
Nicolas Pitre5d0571d2005-11-17 14:02:48 -0500132 */
133#define MAX_IRQ_LOOPS 8
134
135/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 * This selects whether TX packets are sent one by one to the SMC91x internal
137 * memory and throttled until transmission completes. This may prevent
138 * RX overruns a litle by keeping much of the memory free for RX packets
139 * but to the expense of reduced TX throughput and increased IRQ overhead.
140 * Note this is not a cure for a too slow data bus or too high IRQ latency.
141 */
142#define THROTTLE_TX_PKTS 0
143
144/*
145 * The MII clock high/low times. 2x this number gives the MII clock period
146 * in microseconds. (was 50, but this gives 6.4ms for each MII transaction!)
147 */
148#define MII_DELAY 1
149
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150#if SMC_DEBUG > 0
151#define DBG(n, args...) \
152 do { \
153 if (SMC_DEBUG >= (n)) \
154 printk(args); \
155 } while (0)
156
157#define PRINTK(args...) printk(args)
158#else
159#define DBG(n, args...) do { } while(0)
160#define PRINTK(args...) printk(KERN_DEBUG args)
161#endif
162
163#if SMC_DEBUG > 3
164static void PRINT_PKT(u_char *buf, int length)
165{
166 int i;
167 int remainder;
168 int lines;
169
170 lines = length / 16;
171 remainder = length % 16;
172
173 for (i = 0; i < lines ; i ++) {
174 int cur;
175 for (cur = 0; cur < 8; cur++) {
176 u_char a, b;
177 a = *buf++;
178 b = *buf++;
179 printk("%02x%02x ", a, b);
180 }
181 printk("\n");
182 }
183 for (i = 0; i < remainder/2 ; i++) {
184 u_char a, b;
185 a = *buf++;
186 b = *buf++;
187 printk("%02x%02x ", a, b);
188 }
189 printk("\n");
190}
191#else
192#define PRINT_PKT(x...) do { } while(0)
193#endif
194
195
196/* this enables an interrupt in the interrupt mask register */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900197#define SMC_ENABLE_INT(lp, x) do { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 unsigned char mask; \
199 spin_lock_irq(&lp->lock); \
Magnus Dammcfdfa862008-02-22 19:55:05 +0900200 mask = SMC_GET_INT_MASK(lp); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 mask |= (x); \
Magnus Dammcfdfa862008-02-22 19:55:05 +0900202 SMC_SET_INT_MASK(lp, mask); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 spin_unlock_irq(&lp->lock); \
204} while (0)
205
206/* this disables an interrupt from the interrupt mask register */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900207#define SMC_DISABLE_INT(lp, x) do { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 unsigned char mask; \
209 spin_lock_irq(&lp->lock); \
Magnus Dammcfdfa862008-02-22 19:55:05 +0900210 mask = SMC_GET_INT_MASK(lp); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 mask &= ~(x); \
Magnus Dammcfdfa862008-02-22 19:55:05 +0900212 SMC_SET_INT_MASK(lp, mask); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 spin_unlock_irq(&lp->lock); \
214} while (0)
215
216/*
217 * Wait while MMU is busy. This is usually in the order of a few nanosecs
218 * if at all, but let's avoid deadlocking the system if the hardware
219 * decides to go south.
220 */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900221#define SMC_WAIT_MMU_BUSY(lp) do { \
222 if (unlikely(SMC_GET_MMU_CMD(lp) & MC_BUSY)) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 unsigned long timeout = jiffies + 2; \
Magnus Dammcfdfa862008-02-22 19:55:05 +0900224 while (SMC_GET_MMU_CMD(lp) & MC_BUSY) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 if (time_after(jiffies, timeout)) { \
226 printk("%s: timeout %s line %d\n", \
227 dev->name, __FILE__, __LINE__); \
228 break; \
229 } \
230 cpu_relax(); \
231 } \
232 } \
233} while (0)
234
235
236/*
237 * this does a soft reset on the device
238 */
239static void smc_reset(struct net_device *dev)
240{
241 struct smc_local *lp = netdev_priv(dev);
242 void __iomem *ioaddr = lp->base;
243 unsigned int ctl, cfg;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400244 struct sk_buff *pending_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700246 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
Nicolas Pitrebe836682005-06-19 23:56:21 -0400248 /* Disable all interrupts, block TX tasklet */
Russell King76cb4fe2006-08-14 23:00:20 -0700249 spin_lock_irq(&lp->lock);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900250 SMC_SELECT_BANK(lp, 2);
251 SMC_SET_INT_MASK(lp, 0);
Nicolas Pitrebe836682005-06-19 23:56:21 -0400252 pending_skb = lp->pending_tx_skb;
253 lp->pending_tx_skb = NULL;
Russell King76cb4fe2006-08-14 23:00:20 -0700254 spin_unlock_irq(&lp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Nicolas Pitrebe836682005-06-19 23:56:21 -0400256 /* free any pending tx skb */
257 if (pending_skb) {
258 dev_kfree_skb(pending_skb);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700259 dev->stats.tx_errors++;
260 dev->stats.tx_aborted_errors++;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400261 }
262
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 /*
264 * This resets the registers mostly to defaults, but doesn't
265 * affect EEPROM. That seems unnecessary
266 */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900267 SMC_SELECT_BANK(lp, 0);
268 SMC_SET_RCR(lp, RCR_SOFTRST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
270 /*
271 * Setup the Configuration Register
272 * This is necessary because the CONFIG_REG is not affected
273 * by a soft reset
274 */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900275 SMC_SELECT_BANK(lp, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
277 cfg = CONFIG_DEFAULT;
278
279 /*
280 * Setup for fast accesses if requested. If the card/system
281 * can't handle it then there will be no recovery except for
282 * a hard reset or power cycle
283 */
Eric Miaoc4f0e762008-06-19 17:39:03 +0800284 if (lp->cfg.flags & SMC91X_NOWAIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 cfg |= CONFIG_NO_WAIT;
286
287 /*
288 * Release from possible power-down state
289 * Configuration register is not affected by Soft Reset
290 */
291 cfg |= CONFIG_EPH_POWER_EN;
292
Magnus Dammcfdfa862008-02-22 19:55:05 +0900293 SMC_SET_CONFIG(lp, cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
295 /* this should pause enough for the chip to be happy */
296 /*
297 * elaborate? What does the chip _need_? --jgarzik
298 *
299 * This seems to be undocumented, but something the original
300 * driver(s) have always done. Suspect undocumented timing
301 * info/determined empirically. --rmk
302 */
303 udelay(1);
304
305 /* Disable transmit and receive functionality */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900306 SMC_SELECT_BANK(lp, 0);
307 SMC_SET_RCR(lp, RCR_CLEAR);
308 SMC_SET_TCR(lp, TCR_CLEAR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
Magnus Dammcfdfa862008-02-22 19:55:05 +0900310 SMC_SELECT_BANK(lp, 1);
311 ctl = SMC_GET_CTL(lp) | CTL_LE_ENABLE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
313 /*
314 * Set the control register to automatically release successfully
315 * transmitted packets, to make the best use out of our limited
316 * memory
317 */
318 if(!THROTTLE_TX_PKTS)
319 ctl |= CTL_AUTO_RELEASE;
320 else
321 ctl &= ~CTL_AUTO_RELEASE;
Magnus Dammcfdfa862008-02-22 19:55:05 +0900322 SMC_SET_CTL(lp, ctl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
324 /* Reset the MMU */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900325 SMC_SELECT_BANK(lp, 2);
326 SMC_SET_MMU_CMD(lp, MC_RESET);
327 SMC_WAIT_MMU_BUSY(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328}
329
330/*
331 * Enable Interrupts, Receive, and Transmit
332 */
333static void smc_enable(struct net_device *dev)
334{
335 struct smc_local *lp = netdev_priv(dev);
336 void __iomem *ioaddr = lp->base;
337 int mask;
338
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700339 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
341 /* see the header file for options in TCR/RCR DEFAULT */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900342 SMC_SELECT_BANK(lp, 0);
343 SMC_SET_TCR(lp, lp->tcr_cur_mode);
344 SMC_SET_RCR(lp, lp->rcr_cur_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
Magnus Dammcfdfa862008-02-22 19:55:05 +0900346 SMC_SELECT_BANK(lp, 1);
347 SMC_SET_MAC_ADDR(lp, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
349 /* now, enable interrupts */
350 mask = IM_EPH_INT|IM_RX_OVRN_INT|IM_RCV_INT;
351 if (lp->version >= (CHIP_91100 << 4))
352 mask |= IM_MDINT;
Magnus Dammcfdfa862008-02-22 19:55:05 +0900353 SMC_SELECT_BANK(lp, 2);
354 SMC_SET_INT_MASK(lp, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
356 /*
357 * From this point the register bank must _NOT_ be switched away
358 * to something else than bank 2 without proper locking against
359 * races with any tasklet or interrupt handlers until smc_shutdown()
360 * or smc_reset() is called.
361 */
362}
363
364/*
365 * this puts the device in an inactive state
366 */
367static void smc_shutdown(struct net_device *dev)
368{
369 struct smc_local *lp = netdev_priv(dev);
370 void __iomem *ioaddr = lp->base;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400371 struct sk_buff *pending_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700373 DBG(2, "%s: %s\n", CARDNAME, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375 /* no more interrupts for me */
Russell King76cb4fe2006-08-14 23:00:20 -0700376 spin_lock_irq(&lp->lock);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900377 SMC_SELECT_BANK(lp, 2);
378 SMC_SET_INT_MASK(lp, 0);
Nicolas Pitrebe836682005-06-19 23:56:21 -0400379 pending_skb = lp->pending_tx_skb;
380 lp->pending_tx_skb = NULL;
Russell King76cb4fe2006-08-14 23:00:20 -0700381 spin_unlock_irq(&lp->lock);
Nicolas Pitrebe836682005-06-19 23:56:21 -0400382 if (pending_skb)
383 dev_kfree_skb(pending_skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
385 /* and tell the card to stay away from that nasty outside world */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900386 SMC_SELECT_BANK(lp, 0);
387 SMC_SET_RCR(lp, RCR_CLEAR);
388 SMC_SET_TCR(lp, TCR_CLEAR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
390#ifdef POWER_DOWN
391 /* finally, shut the chip down */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900392 SMC_SELECT_BANK(lp, 1);
393 SMC_SET_CONFIG(lp, SMC_GET_CONFIG(lp) & ~CONFIG_EPH_POWER_EN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394#endif
395}
396
397/*
398 * This is the procedure to handle the receipt of a packet.
399 */
400static inline void smc_rcv(struct net_device *dev)
401{
402 struct smc_local *lp = netdev_priv(dev);
403 void __iomem *ioaddr = lp->base;
404 unsigned int packet_number, status, packet_len;
405
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700406 DBG(3, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407
Magnus Dammcfdfa862008-02-22 19:55:05 +0900408 packet_number = SMC_GET_RXFIFO(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 if (unlikely(packet_number & RXFIFO_REMPTY)) {
410 PRINTK("%s: smc_rcv with nothing on FIFO.\n", dev->name);
411 return;
412 }
413
414 /* read from start of packet */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900415 SMC_SET_PTR(lp, PTR_READ | PTR_RCV | PTR_AUTOINC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
417 /* First two words are status and packet length */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900418 SMC_GET_PKT_HDR(lp, status, packet_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 packet_len &= 0x07ff; /* mask off top bits */
420 DBG(2, "%s: RX PNR 0x%x STATUS 0x%04x LENGTH 0x%04x (%d)\n",
421 dev->name, packet_number, status,
422 packet_len, packet_len);
423
424 back:
425 if (unlikely(packet_len < 6 || status & RS_ERRORS)) {
426 if (status & RS_TOOLONG && packet_len <= (1514 + 4 + 6)) {
427 /* accept VLAN packets */
428 status &= ~RS_TOOLONG;
429 goto back;
430 }
431 if (packet_len < 6) {
432 /* bloody hardware */
433 printk(KERN_ERR "%s: fubar (rxlen %u status %x\n",
434 dev->name, packet_len, status);
435 status |= RS_TOOSHORT;
436 }
Magnus Dammcfdfa862008-02-22 19:55:05 +0900437 SMC_WAIT_MMU_BUSY(lp);
438 SMC_SET_MMU_CMD(lp, MC_RELEASE);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700439 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 if (status & RS_ALGNERR)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700441 dev->stats.rx_frame_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 if (status & (RS_TOOSHORT | RS_TOOLONG))
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700443 dev->stats.rx_length_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 if (status & RS_BADCRC)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700445 dev->stats.rx_crc_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 } else {
447 struct sk_buff *skb;
448 unsigned char *data;
449 unsigned int data_len;
450
451 /* set multicast stats */
452 if (status & RS_MULTICAST)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700453 dev->stats.multicast++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
455 /*
456 * Actual payload is packet_len - 6 (or 5 if odd byte).
457 * We want skb_reserve(2) and the final ctrl word
458 * (2 bytes, possibly containing the payload odd byte).
459 * Furthermore, we add 2 bytes to allow rounding up to
460 * multiple of 4 bytes on 32 bit buses.
461 * Hence packet_len - 6 + 2 + 2 + 2.
462 */
463 skb = dev_alloc_skb(packet_len);
464 if (unlikely(skb == NULL)) {
465 printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
466 dev->name);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900467 SMC_WAIT_MMU_BUSY(lp);
468 SMC_SET_MMU_CMD(lp, MC_RELEASE);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700469 dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 return;
471 }
472
473 /* Align IP header to 32 bits */
474 skb_reserve(skb, 2);
475
476 /* BUG: the LAN91C111 rev A never sets this bit. Force it. */
477 if (lp->version == 0x90)
478 status |= RS_ODDFRAME;
479
480 /*
481 * If odd length: packet_len - 5,
482 * otherwise packet_len - 6.
483 * With the trailing ctrl byte it's packet_len - 4.
484 */
485 data_len = packet_len - ((status & RS_ODDFRAME) ? 5 : 6);
486 data = skb_put(skb, data_len);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900487 SMC_PULL_DATA(lp, data, packet_len - 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
Magnus Dammcfdfa862008-02-22 19:55:05 +0900489 SMC_WAIT_MMU_BUSY(lp);
490 SMC_SET_MMU_CMD(lp, MC_RELEASE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
492 PRINT_PKT(data, packet_len - 4);
493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 skb->protocol = eth_type_trans(skb, dev);
495 netif_rx(skb);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700496 dev->stats.rx_packets++;
497 dev->stats.rx_bytes += data_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 }
499}
500
501#ifdef CONFIG_SMP
502/*
503 * On SMP we have the following problem:
504 *
505 * A = smc_hardware_send_pkt()
506 * B = smc_hard_start_xmit()
507 * C = smc_interrupt()
508 *
509 * A and B can never be executed simultaneously. However, at least on UP,
510 * it is possible (and even desirable) for C to interrupt execution of
511 * A or B in order to have better RX reliability and avoid overruns.
512 * C, just like A and B, must have exclusive access to the chip and
513 * each of them must lock against any other concurrent access.
514 * Unfortunately this is not possible to have C suspend execution of A or
515 * B taking place on another CPU. On UP this is no an issue since A and B
516 * are run from softirq context and C from hard IRQ context, and there is
517 * no other CPU where concurrent access can happen.
518 * If ever there is a way to force at least B and C to always be executed
519 * on the same CPU then we could use read/write locks to protect against
520 * any other concurrent access and C would always interrupt B. But life
521 * isn't that easy in a SMP world...
522 */
523#define smc_special_trylock(lock) \
524({ \
525 int __ret; \
526 local_irq_disable(); \
527 __ret = spin_trylock(lock); \
528 if (!__ret) \
529 local_irq_enable(); \
530 __ret; \
531})
532#define smc_special_lock(lock) spin_lock_irq(lock)
533#define smc_special_unlock(lock) spin_unlock_irq(lock)
534#else
535#define smc_special_trylock(lock) (1)
536#define smc_special_lock(lock) do { } while (0)
537#define smc_special_unlock(lock) do { } while (0)
538#endif
539
540/*
541 * This is called to actually send a packet to the chip.
542 */
543static void smc_hardware_send_pkt(unsigned long data)
544{
545 struct net_device *dev = (struct net_device *)data;
546 struct smc_local *lp = netdev_priv(dev);
547 void __iomem *ioaddr = lp->base;
548 struct sk_buff *skb;
549 unsigned int packet_no, len;
550 unsigned char *buf;
551
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700552 DBG(3, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
554 if (!smc_special_trylock(&lp->lock)) {
555 netif_stop_queue(dev);
556 tasklet_schedule(&lp->tx_task);
557 return;
558 }
559
560 skb = lp->pending_tx_skb;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400561 if (unlikely(!skb)) {
562 smc_special_unlock(&lp->lock);
563 return;
564 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 lp->pending_tx_skb = NULL;
Nicolas Pitrebe836682005-06-19 23:56:21 -0400566
Magnus Dammcfdfa862008-02-22 19:55:05 +0900567 packet_no = SMC_GET_AR(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 if (unlikely(packet_no & AR_FAILED)) {
569 printk("%s: Memory allocation failed.\n", dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700570 dev->stats.tx_errors++;
571 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 smc_special_unlock(&lp->lock);
573 goto done;
574 }
575
576 /* point to the beginning of the packet */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900577 SMC_SET_PN(lp, packet_no);
578 SMC_SET_PTR(lp, PTR_AUTOINC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
580 buf = skb->data;
581 len = skb->len;
582 DBG(2, "%s: TX PNR 0x%x LENGTH 0x%04x (%d) BUF 0x%p\n",
583 dev->name, packet_no, len, len, buf);
584 PRINT_PKT(buf, len);
585
586 /*
587 * Send the packet length (+6 for status words, length, and ctl.
588 * The card will pad to 64 bytes with zeroes if packet is too small.
589 */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900590 SMC_PUT_PKT_HDR(lp, 0, len + 6);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
592 /* send the actual data */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900593 SMC_PUSH_DATA(lp, buf, len & ~1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594
595 /* Send final ctl word with the last byte if there is one */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900596 SMC_outw(((len & 1) ? (0x2000 | buf[len-1]) : 0), ioaddr, DATA_REG(lp));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597
598 /*
Nicolas Pitreea937562005-04-12 16:26:40 -0400599 * If THROTTLE_TX_PKTS is set, we stop the queue here. This will
600 * have the effect of having at most one packet queued for TX
601 * in the chip's memory at all time.
602 *
603 * If THROTTLE_TX_PKTS is not set then the queue is stopped only
604 * when memory allocation (MC_ALLOC) does not succeed right away.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 */
Nicolas Pitreea937562005-04-12 16:26:40 -0400606 if (THROTTLE_TX_PKTS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 netif_stop_queue(dev);
608
609 /* queue the packet for TX */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900610 SMC_SET_MMU_CMD(lp, MC_ENQUEUE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 smc_special_unlock(&lp->lock);
612
613 dev->trans_start = jiffies;
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700614 dev->stats.tx_packets++;
615 dev->stats.tx_bytes += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
Magnus Dammcfdfa862008-02-22 19:55:05 +0900617 SMC_ENABLE_INT(lp, IM_TX_INT | IM_TX_EMPTY_INT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
619done: if (!THROTTLE_TX_PKTS)
620 netif_wake_queue(dev);
621
622 dev_kfree_skb(skb);
623}
624
625/*
626 * Since I am not sure if I will have enough room in the chip's ram
627 * to store the packet, I call this routine which either sends it
628 * now, or set the card to generates an interrupt when ready
629 * for the packet.
630 */
631static int smc_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
632{
633 struct smc_local *lp = netdev_priv(dev);
634 void __iomem *ioaddr = lp->base;
635 unsigned int numPages, poll_count, status;
636
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700637 DBG(3, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
639 BUG_ON(lp->pending_tx_skb != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
641 /*
642 * The MMU wants the number of pages to be the number of 256 bytes
643 * 'pages', minus 1 (since a packet can't ever have 0 pages :))
644 *
645 * The 91C111 ignores the size bits, but earlier models don't.
646 *
647 * Pkt size for allocating is data length +6 (for additional status
648 * words, length and ctl)
649 *
650 * If odd size then last byte is included in ctl word.
651 */
652 numPages = ((skb->len & ~1) + (6 - 1)) >> 8;
653 if (unlikely(numPages > 7)) {
654 printk("%s: Far too big packet error.\n", dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700655 dev->stats.tx_errors++;
656 dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 dev_kfree_skb(skb);
658 return 0;
659 }
660
661 smc_special_lock(&lp->lock);
662
663 /* now, try to allocate the memory */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900664 SMC_SET_MMU_CMD(lp, MC_ALLOC | numPages);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665
666 /*
667 * Poll the chip for a short amount of time in case the
668 * allocation succeeds quickly.
669 */
670 poll_count = MEMORY_WAIT_TIME;
671 do {
Magnus Dammcfdfa862008-02-22 19:55:05 +0900672 status = SMC_GET_INT(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 if (status & IM_ALLOC_INT) {
Magnus Dammcfdfa862008-02-22 19:55:05 +0900674 SMC_ACK_INT(lp, IM_ALLOC_INT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 break;
676 }
677 } while (--poll_count);
678
679 smc_special_unlock(&lp->lock);
680
Nicolas Pitrebe836682005-06-19 23:56:21 -0400681 lp->pending_tx_skb = skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 if (!poll_count) {
683 /* oh well, wait until the chip finds memory later */
684 netif_stop_queue(dev);
685 DBG(2, "%s: TX memory allocation deferred.\n", dev->name);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900686 SMC_ENABLE_INT(lp, IM_ALLOC_INT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 } else {
688 /*
689 * Allocation succeeded: push packet to the chip's own memory
690 * immediately.
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400691 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 smc_hardware_send_pkt((unsigned long)dev);
693 }
694
695 return 0;
696}
697
698/*
699 * This handles a TX interrupt, which is only called when:
700 * - a TX error occurred, or
701 * - CTL_AUTO_RELEASE is not set and TX of a packet completed.
702 */
703static void smc_tx(struct net_device *dev)
704{
705 struct smc_local *lp = netdev_priv(dev);
706 void __iomem *ioaddr = lp->base;
707 unsigned int saved_packet, packet_no, tx_status, pkt_len;
708
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700709 DBG(3, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710
711 /* If the TX FIFO is empty then nothing to do */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900712 packet_no = SMC_GET_TXFIFO(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 if (unlikely(packet_no & TXFIFO_TEMPTY)) {
714 PRINTK("%s: smc_tx with nothing on FIFO.\n", dev->name);
715 return;
716 }
717
718 /* select packet to read from */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900719 saved_packet = SMC_GET_PN(lp);
720 SMC_SET_PN(lp, packet_no);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
722 /* read the first word (status word) from this packet */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900723 SMC_SET_PTR(lp, PTR_AUTOINC | PTR_READ);
724 SMC_GET_PKT_HDR(lp, tx_status, pkt_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 DBG(2, "%s: TX STATUS 0x%04x PNR 0x%02x\n",
726 dev->name, tx_status, packet_no);
727
Nicolas Pitre8de90112005-04-12 16:21:11 -0400728 if (!(tx_status & ES_TX_SUC))
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700729 dev->stats.tx_errors++;
Nicolas Pitre8de90112005-04-12 16:21:11 -0400730
731 if (tx_status & ES_LOSTCARR)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700732 dev->stats.tx_carrier_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733
Nicolas Pitre8de90112005-04-12 16:21:11 -0400734 if (tx_status & (ES_LATCOL | ES_16COL)) {
735 PRINTK("%s: %s occurred on last xmit\n", dev->name,
736 (tx_status & ES_LATCOL) ?
737 "late collision" : "too many collisions");
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700738 dev->stats.tx_window_errors++;
739 if (!(dev->stats.tx_window_errors & 63) && net_ratelimit()) {
Nicolas Pitre8de90112005-04-12 16:21:11 -0400740 printk(KERN_INFO "%s: unexpectedly large number of "
741 "bad collisions. Please check duplex "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 "setting.\n", dev->name);
743 }
744 }
745
746 /* kill the packet */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900747 SMC_WAIT_MMU_BUSY(lp);
748 SMC_SET_MMU_CMD(lp, MC_FREEPKT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749
750 /* Don't restore Packet Number Reg until busy bit is cleared */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900751 SMC_WAIT_MMU_BUSY(lp);
752 SMC_SET_PN(lp, saved_packet);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753
754 /* re-enable transmit */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900755 SMC_SELECT_BANK(lp, 0);
756 SMC_SET_TCR(lp, lp->tcr_cur_mode);
757 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758}
759
760
761/*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
762
763static void smc_mii_out(struct net_device *dev, unsigned int val, int bits)
764{
765 struct smc_local *lp = netdev_priv(dev);
766 void __iomem *ioaddr = lp->base;
767 unsigned int mii_reg, mask;
768
Magnus Dammcfdfa862008-02-22 19:55:05 +0900769 mii_reg = SMC_GET_MII(lp) & ~(MII_MCLK | MII_MDOE | MII_MDO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 mii_reg |= MII_MDOE;
771
772 for (mask = 1 << (bits - 1); mask; mask >>= 1) {
773 if (val & mask)
774 mii_reg |= MII_MDO;
775 else
776 mii_reg &= ~MII_MDO;
777
Magnus Dammcfdfa862008-02-22 19:55:05 +0900778 SMC_SET_MII(lp, mii_reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 udelay(MII_DELAY);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900780 SMC_SET_MII(lp, mii_reg | MII_MCLK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 udelay(MII_DELAY);
782 }
783}
784
785static unsigned int smc_mii_in(struct net_device *dev, int bits)
786{
787 struct smc_local *lp = netdev_priv(dev);
788 void __iomem *ioaddr = lp->base;
789 unsigned int mii_reg, mask, val;
790
Magnus Dammcfdfa862008-02-22 19:55:05 +0900791 mii_reg = SMC_GET_MII(lp) & ~(MII_MCLK | MII_MDOE | MII_MDO);
792 SMC_SET_MII(lp, mii_reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793
794 for (mask = 1 << (bits - 1), val = 0; mask; mask >>= 1) {
Magnus Dammcfdfa862008-02-22 19:55:05 +0900795 if (SMC_GET_MII(lp) & MII_MDI)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 val |= mask;
797
Magnus Dammcfdfa862008-02-22 19:55:05 +0900798 SMC_SET_MII(lp, mii_reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 udelay(MII_DELAY);
Magnus Dammcfdfa862008-02-22 19:55:05 +0900800 SMC_SET_MII(lp, mii_reg | MII_MCLK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 udelay(MII_DELAY);
802 }
803
804 return val;
805}
806
807/*
808 * Reads a register from the MII Management serial interface
809 */
810static int smc_phy_read(struct net_device *dev, int phyaddr, int phyreg)
811{
812 struct smc_local *lp = netdev_priv(dev);
813 void __iomem *ioaddr = lp->base;
814 unsigned int phydata;
815
Magnus Dammcfdfa862008-02-22 19:55:05 +0900816 SMC_SELECT_BANK(lp, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817
818 /* Idle - 32 ones */
819 smc_mii_out(dev, 0xffffffff, 32);
820
821 /* Start code (01) + read (10) + phyaddr + phyreg */
822 smc_mii_out(dev, 6 << 10 | phyaddr << 5 | phyreg, 14);
823
824 /* Turnaround (2bits) + phydata */
825 phydata = smc_mii_in(dev, 18);
826
827 /* Return to idle state */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900828 SMC_SET_MII(lp, SMC_GET_MII(lp) & ~(MII_MCLK|MII_MDOE|MII_MDO));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829
830 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700831 __func__, phyaddr, phyreg, phydata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832
Magnus Dammcfdfa862008-02-22 19:55:05 +0900833 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 return phydata;
835}
836
837/*
838 * Writes a register to the MII Management serial interface
839 */
840static void smc_phy_write(struct net_device *dev, int phyaddr, int phyreg,
841 int phydata)
842{
843 struct smc_local *lp = netdev_priv(dev);
844 void __iomem *ioaddr = lp->base;
845
Magnus Dammcfdfa862008-02-22 19:55:05 +0900846 SMC_SELECT_BANK(lp, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847
848 /* Idle - 32 ones */
849 smc_mii_out(dev, 0xffffffff, 32);
850
851 /* Start code (01) + write (01) + phyaddr + phyreg + turnaround + phydata */
852 smc_mii_out(dev, 5 << 28 | phyaddr << 23 | phyreg << 18 | 2 << 16 | phydata, 32);
853
854 /* Return to idle state */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900855 SMC_SET_MII(lp, SMC_GET_MII(lp) & ~(MII_MCLK|MII_MDOE|MII_MDO));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856
857 DBG(3, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700858 __func__, phyaddr, phyreg, phydata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859
Magnus Dammcfdfa862008-02-22 19:55:05 +0900860 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861}
862
863/*
864 * Finds and reports the PHY address
865 */
866static void smc_phy_detect(struct net_device *dev)
867{
868 struct smc_local *lp = netdev_priv(dev);
869 int phyaddr;
870
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700871 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
873 lp->phy_type = 0;
874
875 /*
876 * Scan all 32 PHY addresses if necessary, starting at
877 * PHY#1 to PHY#31, and then PHY#0 last.
878 */
879 for (phyaddr = 1; phyaddr < 33; ++phyaddr) {
880 unsigned int id1, id2;
881
882 /* Read the PHY identifiers */
883 id1 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID1);
884 id2 = smc_phy_read(dev, phyaddr & 31, MII_PHYSID2);
885
886 DBG(3, "%s: phy_id1=0x%x, phy_id2=0x%x\n",
887 dev->name, id1, id2);
888
889 /* Make sure it is a valid identifier */
890 if (id1 != 0x0000 && id1 != 0xffff && id1 != 0x8000 &&
891 id2 != 0x0000 && id2 != 0xffff && id2 != 0x8000) {
892 /* Save the PHY's address */
893 lp->mii.phy_id = phyaddr & 31;
894 lp->phy_type = id1 << 16 | id2;
895 break;
896 }
897 }
898}
899
900/*
901 * Sets the PHY to a configuration as determined by the user
902 */
903static int smc_phy_fixed(struct net_device *dev)
904{
905 struct smc_local *lp = netdev_priv(dev);
906 void __iomem *ioaddr = lp->base;
907 int phyaddr = lp->mii.phy_id;
908 int bmcr, cfg1;
909
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700910 DBG(3, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911
912 /* Enter Link Disable state */
913 cfg1 = smc_phy_read(dev, phyaddr, PHY_CFG1_REG);
914 cfg1 |= PHY_CFG1_LNKDIS;
915 smc_phy_write(dev, phyaddr, PHY_CFG1_REG, cfg1);
916
917 /*
918 * Set our fixed capabilities
919 * Disable auto-negotiation
920 */
921 bmcr = 0;
922
923 if (lp->ctl_rfduplx)
924 bmcr |= BMCR_FULLDPLX;
925
926 if (lp->ctl_rspeed == 100)
927 bmcr |= BMCR_SPEED100;
928
929 /* Write our capabilities to the phy control register */
930 smc_phy_write(dev, phyaddr, MII_BMCR, bmcr);
931
932 /* Re-Configure the Receive/Phy Control register */
Magnus Dammcfdfa862008-02-22 19:55:05 +0900933 SMC_SELECT_BANK(lp, 0);
934 SMC_SET_RPC(lp, lp->rpc_cur_mode);
935 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
937 return 1;
938}
939
940/*
941 * smc_phy_reset - reset the phy
942 * @dev: net device
943 * @phy: phy address
944 *
945 * Issue a software reset for the specified PHY and
946 * wait up to 100ms for the reset to complete. We should
947 * not access the PHY for 50ms after issuing the reset.
948 *
949 * The time to wait appears to be dependent on the PHY.
950 *
951 * Must be called with lp->lock locked.
952 */
953static int smc_phy_reset(struct net_device *dev, int phy)
954{
955 struct smc_local *lp = netdev_priv(dev);
956 unsigned int bmcr;
957 int timeout;
958
959 smc_phy_write(dev, phy, MII_BMCR, BMCR_RESET);
960
961 for (timeout = 2; timeout; timeout--) {
962 spin_unlock_irq(&lp->lock);
963 msleep(50);
964 spin_lock_irq(&lp->lock);
965
966 bmcr = smc_phy_read(dev, phy, MII_BMCR);
967 if (!(bmcr & BMCR_RESET))
968 break;
969 }
970
971 return bmcr & BMCR_RESET;
972}
973
974/*
975 * smc_phy_powerdown - powerdown phy
976 * @dev: net device
977 *
978 * Power down the specified PHY
979 */
980static void smc_phy_powerdown(struct net_device *dev)
981{
982 struct smc_local *lp = netdev_priv(dev);
983 unsigned int bmcr;
984 int phy = lp->mii.phy_id;
985
986 if (lp->phy_type == 0)
987 return;
988
989 /* We need to ensure that no calls to smc_phy_configure are
990 pending.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 */
David S. Miller4bb073c2008-06-12 02:22:02 -0700992 cancel_work_sync(&lp->phy_configure);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993
994 bmcr = smc_phy_read(dev, phy, MII_BMCR);
995 smc_phy_write(dev, phy, MII_BMCR, bmcr | BMCR_PDOWN);
996}
997
998/*
999 * smc_phy_check_media - check the media status and adjust TCR
1000 * @dev: net device
1001 * @init: set true for initialisation
1002 *
1003 * Select duplex mode depending on negotiation state. This
1004 * also updates our carrier state.
1005 */
1006static void smc_phy_check_media(struct net_device *dev, int init)
1007{
1008 struct smc_local *lp = netdev_priv(dev);
1009 void __iomem *ioaddr = lp->base;
1010
1011 if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
1012 /* duplex state has changed */
1013 if (lp->mii.full_duplex) {
1014 lp->tcr_cur_mode |= TCR_SWFDUP;
1015 } else {
1016 lp->tcr_cur_mode &= ~TCR_SWFDUP;
1017 }
1018
Magnus Dammcfdfa862008-02-22 19:55:05 +09001019 SMC_SELECT_BANK(lp, 0);
1020 SMC_SET_TCR(lp, lp->tcr_cur_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 }
1022}
1023
1024/*
1025 * Configures the specified PHY through the MII management interface
1026 * using Autonegotiation.
1027 * Calls smc_phy_fixed() if the user has requested a certain config.
1028 * If RPC ANEG bit is set, the media selection is dependent purely on
1029 * the selection by the MII (either in the MII BMCR reg or the result
1030 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
1031 * is controlled by the RPC SPEED and RPC DPLX bits.
1032 */
David Howells6d5aefb2006-12-05 19:36:26 +00001033static void smc_phy_configure(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034{
David Howells6d5aefb2006-12-05 19:36:26 +00001035 struct smc_local *lp =
1036 container_of(work, struct smc_local, phy_configure);
1037 struct net_device *dev = lp->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 void __iomem *ioaddr = lp->base;
1039 int phyaddr = lp->mii.phy_id;
1040 int my_phy_caps; /* My PHY capabilities */
1041 int my_ad_caps; /* My Advertised capabilities */
1042 int status;
1043
1044 DBG(3, "%s:smc_program_phy()\n", dev->name);
1045
1046 spin_lock_irq(&lp->lock);
1047
1048 /*
1049 * We should not be called if phy_type is zero.
1050 */
1051 if (lp->phy_type == 0)
1052 goto smc_phy_configure_exit;
1053
1054 if (smc_phy_reset(dev, phyaddr)) {
1055 printk("%s: PHY reset timed out\n", dev->name);
1056 goto smc_phy_configure_exit;
1057 }
1058
1059 /*
1060 * Enable PHY Interrupts (for register 18)
1061 * Interrupts listed here are disabled
1062 */
1063 smc_phy_write(dev, phyaddr, PHY_MASK_REG,
1064 PHY_INT_LOSSSYNC | PHY_INT_CWRD | PHY_INT_SSD |
1065 PHY_INT_ESD | PHY_INT_RPOL | PHY_INT_JAB |
1066 PHY_INT_SPDDET | PHY_INT_DPLXDET);
1067
1068 /* Configure the Receive/Phy Control register */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001069 SMC_SELECT_BANK(lp, 0);
1070 SMC_SET_RPC(lp, lp->rpc_cur_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071
1072 /* If the user requested no auto neg, then go set his request */
1073 if (lp->mii.force_media) {
1074 smc_phy_fixed(dev);
1075 goto smc_phy_configure_exit;
1076 }
1077
1078 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
1079 my_phy_caps = smc_phy_read(dev, phyaddr, MII_BMSR);
1080
1081 if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
1082 printk(KERN_INFO "Auto negotiation NOT supported\n");
1083 smc_phy_fixed(dev);
1084 goto smc_phy_configure_exit;
1085 }
1086
1087 my_ad_caps = ADVERTISE_CSMA; /* I am CSMA capable */
1088
1089 if (my_phy_caps & BMSR_100BASE4)
1090 my_ad_caps |= ADVERTISE_100BASE4;
1091 if (my_phy_caps & BMSR_100FULL)
1092 my_ad_caps |= ADVERTISE_100FULL;
1093 if (my_phy_caps & BMSR_100HALF)
1094 my_ad_caps |= ADVERTISE_100HALF;
1095 if (my_phy_caps & BMSR_10FULL)
1096 my_ad_caps |= ADVERTISE_10FULL;
1097 if (my_phy_caps & BMSR_10HALF)
1098 my_ad_caps |= ADVERTISE_10HALF;
1099
1100 /* Disable capabilities not selected by our user */
1101 if (lp->ctl_rspeed != 100)
1102 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
1103
1104 if (!lp->ctl_rfduplx)
1105 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
1106
1107 /* Update our Auto-Neg Advertisement Register */
1108 smc_phy_write(dev, phyaddr, MII_ADVERTISE, my_ad_caps);
1109 lp->mii.advertising = my_ad_caps;
1110
1111 /*
1112 * Read the register back. Without this, it appears that when
1113 * auto-negotiation is restarted, sometimes it isn't ready and
1114 * the link does not come up.
1115 */
1116 status = smc_phy_read(dev, phyaddr, MII_ADVERTISE);
1117
1118 DBG(2, "%s: phy caps=%x\n", dev->name, my_phy_caps);
1119 DBG(2, "%s: phy advertised caps=%x\n", dev->name, my_ad_caps);
1120
1121 /* Restart auto-negotiation process in order to advertise my caps */
1122 smc_phy_write(dev, phyaddr, MII_BMCR, BMCR_ANENABLE | BMCR_ANRESTART);
1123
1124 smc_phy_check_media(dev, 1);
1125
1126smc_phy_configure_exit:
Magnus Dammcfdfa862008-02-22 19:55:05 +09001127 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 spin_unlock_irq(&lp->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129}
1130
1131/*
1132 * smc_phy_interrupt
1133 *
1134 * Purpose: Handle interrupts relating to PHY register 18. This is
1135 * called from the "hard" interrupt handler under our private spinlock.
1136 */
1137static void smc_phy_interrupt(struct net_device *dev)
1138{
1139 struct smc_local *lp = netdev_priv(dev);
1140 int phyaddr = lp->mii.phy_id;
1141 int phy18;
1142
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001143 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144
1145 if (lp->phy_type == 0)
1146 return;
1147
1148 for(;;) {
1149 smc_phy_check_media(dev, 0);
1150
1151 /* Read PHY Register 18, Status Output */
1152 phy18 = smc_phy_read(dev, phyaddr, PHY_INT_REG);
1153 if ((phy18 & PHY_INT_INT) == 0)
1154 break;
1155 }
1156}
1157
1158/*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1159
1160static void smc_10bt_check_media(struct net_device *dev, int init)
1161{
1162 struct smc_local *lp = netdev_priv(dev);
1163 void __iomem *ioaddr = lp->base;
1164 unsigned int old_carrier, new_carrier;
1165
1166 old_carrier = netif_carrier_ok(dev) ? 1 : 0;
1167
Magnus Dammcfdfa862008-02-22 19:55:05 +09001168 SMC_SELECT_BANK(lp, 0);
1169 new_carrier = (SMC_GET_EPH_STATUS(lp) & ES_LINK_OK) ? 1 : 0;
1170 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171
1172 if (init || (old_carrier != new_carrier)) {
1173 if (!new_carrier) {
1174 netif_carrier_off(dev);
1175 } else {
1176 netif_carrier_on(dev);
1177 }
1178 if (netif_msg_link(lp))
1179 printk(KERN_INFO "%s: link %s\n", dev->name,
1180 new_carrier ? "up" : "down");
1181 }
1182}
1183
1184static void smc_eph_interrupt(struct net_device *dev)
1185{
1186 struct smc_local *lp = netdev_priv(dev);
1187 void __iomem *ioaddr = lp->base;
1188 unsigned int ctl;
1189
1190 smc_10bt_check_media(dev, 0);
1191
Magnus Dammcfdfa862008-02-22 19:55:05 +09001192 SMC_SELECT_BANK(lp, 1);
1193 ctl = SMC_GET_CTL(lp);
1194 SMC_SET_CTL(lp, ctl & ~CTL_LE_ENABLE);
1195 SMC_SET_CTL(lp, ctl);
1196 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197}
1198
1199/*
1200 * This is the main routine of the driver, to handle the device when
1201 * it needs some attention.
1202 */
David Howells7d12e782006-10-05 14:55:46 +01001203static irqreturn_t smc_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204{
1205 struct net_device *dev = dev_id;
1206 struct smc_local *lp = netdev_priv(dev);
1207 void __iomem *ioaddr = lp->base;
1208 int status, mask, timeout, card_stats;
1209 int saved_pointer;
1210
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001211 DBG(3, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212
1213 spin_lock(&lp->lock);
1214
1215 /* A preamble may be used when there is a potential race
1216 * between the interruptible transmit functions and this
1217 * ISR. */
1218 SMC_INTERRUPT_PREAMBLE;
1219
Magnus Dammcfdfa862008-02-22 19:55:05 +09001220 saved_pointer = SMC_GET_PTR(lp);
1221 mask = SMC_GET_INT_MASK(lp);
1222 SMC_SET_INT_MASK(lp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223
1224 /* set a timeout value, so I don't stay here forever */
Nicolas Pitre5d0571d2005-11-17 14:02:48 -05001225 timeout = MAX_IRQ_LOOPS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226
1227 do {
Magnus Dammcfdfa862008-02-22 19:55:05 +09001228 status = SMC_GET_INT(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229
1230 DBG(2, "%s: INT 0x%02x MASK 0x%02x MEM 0x%04x FIFO 0x%04x\n",
1231 dev->name, status, mask,
Magnus Dammcfdfa862008-02-22 19:55:05 +09001232 ({ int meminfo; SMC_SELECT_BANK(lp, 0);
1233 meminfo = SMC_GET_MIR(lp);
1234 SMC_SELECT_BANK(lp, 2); meminfo; }),
1235 SMC_GET_FIFO(lp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236
1237 status &= mask;
1238 if (!status)
1239 break;
1240
Nicolas Pitreea937562005-04-12 16:26:40 -04001241 if (status & IM_TX_INT) {
1242 /* do this before RX as it will free memory quickly */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 DBG(3, "%s: TX int\n", dev->name);
1244 smc_tx(dev);
Magnus Dammcfdfa862008-02-22 19:55:05 +09001245 SMC_ACK_INT(lp, IM_TX_INT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 if (THROTTLE_TX_PKTS)
1247 netif_wake_queue(dev);
Nicolas Pitreea937562005-04-12 16:26:40 -04001248 } else if (status & IM_RCV_INT) {
1249 DBG(3, "%s: RX irq\n", dev->name);
1250 smc_rcv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 } else if (status & IM_ALLOC_INT) {
1252 DBG(3, "%s: Allocation irq\n", dev->name);
1253 tasklet_hi_schedule(&lp->tx_task);
1254 mask &= ~IM_ALLOC_INT;
1255 } else if (status & IM_TX_EMPTY_INT) {
1256 DBG(3, "%s: TX empty\n", dev->name);
1257 mask &= ~IM_TX_EMPTY_INT;
1258
1259 /* update stats */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001260 SMC_SELECT_BANK(lp, 0);
1261 card_stats = SMC_GET_COUNTER(lp);
1262 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263
1264 /* single collisions */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001265 dev->stats.collisions += card_stats & 0xF;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 card_stats >>= 4;
1267
1268 /* multiple collisions */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001269 dev->stats.collisions += card_stats & 0xF;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 } else if (status & IM_RX_OVRN_INT) {
Nicolas Pitre8de90112005-04-12 16:21:11 -04001271 DBG(1, "%s: RX overrun (EPH_ST 0x%04x)\n", dev->name,
Magnus Dammcfdfa862008-02-22 19:55:05 +09001272 ({ int eph_st; SMC_SELECT_BANK(lp, 0);
1273 eph_st = SMC_GET_EPH_STATUS(lp);
1274 SMC_SELECT_BANK(lp, 2); eph_st; }));
1275 SMC_ACK_INT(lp, IM_RX_OVRN_INT);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001276 dev->stats.rx_errors++;
1277 dev->stats.rx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 } else if (status & IM_EPH_INT) {
1279 smc_eph_interrupt(dev);
1280 } else if (status & IM_MDINT) {
Magnus Dammcfdfa862008-02-22 19:55:05 +09001281 SMC_ACK_INT(lp, IM_MDINT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 smc_phy_interrupt(dev);
1283 } else if (status & IM_ERCV_INT) {
Magnus Dammcfdfa862008-02-22 19:55:05 +09001284 SMC_ACK_INT(lp, IM_ERCV_INT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 PRINTK("%s: UNSUPPORTED: ERCV INTERRUPT \n", dev->name);
1286 }
1287 } while (--timeout);
1288
1289 /* restore register states */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001290 SMC_SET_PTR(lp, saved_pointer);
1291 SMC_SET_INT_MASK(lp, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292 spin_unlock(&lp->lock);
1293
Sonic Zhangc500cb22008-04-10 21:30:37 -07001294#ifndef CONFIG_NET_POLL_CONTROLLER
Nicolas Pitre5d0571d2005-11-17 14:02:48 -05001295 if (timeout == MAX_IRQ_LOOPS)
1296 PRINTK("%s: spurious interrupt (mask = 0x%02x)\n",
1297 dev->name, mask);
Sonic Zhangc500cb22008-04-10 21:30:37 -07001298#endif
Nicolas Pitre5d0571d2005-11-17 14:02:48 -05001299 DBG(3, "%s: Interrupt done (%d loops)\n",
1300 dev->name, MAX_IRQ_LOOPS - timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301
1302 /*
1303 * We return IRQ_HANDLED unconditionally here even if there was
1304 * nothing to do. There is a possibility that a packet might
1305 * get enqueued into the chip right after TX_EMPTY_INT is raised
1306 * but just before the CPU acknowledges the IRQ.
1307 * Better take an unneeded IRQ in some occasions than complexifying
1308 * the code for all cases.
1309 */
1310 return IRQ_HANDLED;
1311}
1312
1313#ifdef CONFIG_NET_POLL_CONTROLLER
1314/*
1315 * Polling receive - used by netconsole and other diagnostic tools
1316 * to allow network i/o with interrupts disabled.
1317 */
1318static void smc_poll_controller(struct net_device *dev)
1319{
1320 disable_irq(dev->irq);
Al Viro9c8e7f52006-10-07 16:29:18 +01001321 smc_interrupt(dev->irq, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 enable_irq(dev->irq);
1323}
1324#endif
1325
1326/* Our watchdog timed out. Called by the networking layer */
1327static void smc_timeout(struct net_device *dev)
1328{
1329 struct smc_local *lp = netdev_priv(dev);
1330 void __iomem *ioaddr = lp->base;
Nicolas Pitre8de90112005-04-12 16:21:11 -04001331 int status, mask, eph_st, meminfo, fifo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001333 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334
1335 spin_lock_irq(&lp->lock);
Magnus Dammcfdfa862008-02-22 19:55:05 +09001336 status = SMC_GET_INT(lp);
1337 mask = SMC_GET_INT_MASK(lp);
1338 fifo = SMC_GET_FIFO(lp);
1339 SMC_SELECT_BANK(lp, 0);
1340 eph_st = SMC_GET_EPH_STATUS(lp);
1341 meminfo = SMC_GET_MIR(lp);
1342 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343 spin_unlock_irq(&lp->lock);
Nicolas Pitre8de90112005-04-12 16:21:11 -04001344 PRINTK( "%s: TX timeout (INT 0x%02x INTMASK 0x%02x "
1345 "MEM 0x%04x FIFO 0x%04x EPH_ST 0x%04x)\n",
1346 dev->name, status, mask, meminfo, fifo, eph_st );
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347
1348 smc_reset(dev);
1349 smc_enable(dev);
1350
1351 /*
1352 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1353 * smc_phy_configure() calls msleep() which calls schedule_timeout()
1354 * which calls schedule(). Hence we use a work queue.
1355 */
David S. Miller4bb073c2008-06-12 02:22:02 -07001356 if (lp->phy_type != 0)
1357 schedule_work(&lp->phy_configure);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358
1359 /* We can accept TX packets again */
1360 dev->trans_start = jiffies;
1361 netif_wake_queue(dev);
1362}
1363
1364/*
1365 * This routine will, depending on the values passed to it,
1366 * either make it accept multicast packets, go into
1367 * promiscuous mode (for TCPDUMP and cousins) or accept
1368 * a select set of multicast packets
1369 */
1370static void smc_set_multicast_list(struct net_device *dev)
1371{
1372 struct smc_local *lp = netdev_priv(dev);
1373 void __iomem *ioaddr = lp->base;
1374 unsigned char multicast_table[8];
1375 int update_multicast = 0;
1376
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001377 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378
1379 if (dev->flags & IFF_PROMISC) {
1380 DBG(2, "%s: RCR_PRMS\n", dev->name);
1381 lp->rcr_cur_mode |= RCR_PRMS;
1382 }
1383
1384/* BUG? I never disable promiscuous mode if multicasting was turned on.
1385 Now, I turn off promiscuous mode, but I don't do anything to multicasting
1386 when promiscuous mode is turned on.
1387*/
1388
1389 /*
1390 * Here, I am setting this to accept all multicast packets.
1391 * I don't need to zero the multicast table, because the flag is
1392 * checked before the table is
1393 */
1394 else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) {
1395 DBG(2, "%s: RCR_ALMUL\n", dev->name);
1396 lp->rcr_cur_mode |= RCR_ALMUL;
1397 }
1398
1399 /*
1400 * This sets the internal hardware table to filter out unwanted
1401 * multicast packets before they take up memory.
1402 *
1403 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1404 * address are the offset into the table. If that bit is 1, then the
1405 * multicast packet is accepted. Otherwise, it's dropped silently.
1406 *
1407 * To use the 6 bits as an offset into the table, the high 3 bits are
1408 * the number of the 8 bit register, while the low 3 bits are the bit
1409 * within that register.
1410 */
1411 else if (dev->mc_count) {
1412 int i;
1413 struct dev_mc_list *cur_addr;
1414
1415 /* table for flipping the order of 3 bits */
1416 static const unsigned char invert3[] = {0, 4, 2, 6, 1, 5, 3, 7};
1417
1418 /* start with a table of all zeros: reject all */
1419 memset(multicast_table, 0, sizeof(multicast_table));
1420
1421 cur_addr = dev->mc_list;
1422 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
1423 int position;
1424
1425 /* do we have a pointer here? */
1426 if (!cur_addr)
1427 break;
1428 /* make sure this is a multicast address -
1429 shouldn't this be a given if we have it here ? */
1430 if (!(*cur_addr->dmi_addr & 1))
1431 continue;
1432
1433 /* only use the low order bits */
1434 position = crc32_le(~0, cur_addr->dmi_addr, 6) & 0x3f;
1435
1436 /* do some messy swapping to put the bit in the right spot */
1437 multicast_table[invert3[position&7]] |=
1438 (1<<invert3[(position>>3)&7]);
1439 }
1440
1441 /* be sure I get rid of flags I might have set */
1442 lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL);
1443
1444 /* now, the table can be loaded into the chipset */
1445 update_multicast = 1;
1446 } else {
1447 DBG(2, "%s: ~(RCR_PRMS|RCR_ALMUL)\n", dev->name);
1448 lp->rcr_cur_mode &= ~(RCR_PRMS | RCR_ALMUL);
1449
1450 /*
1451 * since I'm disabling all multicast entirely, I need to
1452 * clear the multicast list
1453 */
1454 memset(multicast_table, 0, sizeof(multicast_table));
1455 update_multicast = 1;
1456 }
1457
1458 spin_lock_irq(&lp->lock);
Magnus Dammcfdfa862008-02-22 19:55:05 +09001459 SMC_SELECT_BANK(lp, 0);
1460 SMC_SET_RCR(lp, lp->rcr_cur_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461 if (update_multicast) {
Magnus Dammcfdfa862008-02-22 19:55:05 +09001462 SMC_SELECT_BANK(lp, 3);
1463 SMC_SET_MCAST(lp, multicast_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 }
Magnus Dammcfdfa862008-02-22 19:55:05 +09001465 SMC_SELECT_BANK(lp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466 spin_unlock_irq(&lp->lock);
1467}
1468
1469
1470/*
1471 * Open and Initialize the board
1472 *
1473 * Set up everything, reset the card, etc..
1474 */
1475static int
1476smc_open(struct net_device *dev)
1477{
1478 struct smc_local *lp = netdev_priv(dev);
1479
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001480 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481
1482 /*
1483 * Check that the address is valid. If its not, refuse
1484 * to bring the device up. The user must specify an
1485 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1486 */
1487 if (!is_valid_ether_addr(dev->dev_addr)) {
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001488 PRINTK("%s: no valid ethernet hw addr\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489 return -EINVAL;
1490 }
1491
1492 /* Setup the default Register Modes */
1493 lp->tcr_cur_mode = TCR_DEFAULT;
1494 lp->rcr_cur_mode = RCR_DEFAULT;
Russell Kingb0dbcf52008-09-04 21:13:37 +01001495 lp->rpc_cur_mode = RPC_DEFAULT |
1496 lp->cfg.leda << RPC_LSXA_SHFT |
1497 lp->cfg.ledb << RPC_LSXB_SHFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498
1499 /*
1500 * If we are not using a MII interface, we need to
1501 * monitor our own carrier signal to detect faults.
1502 */
1503 if (lp->phy_type == 0)
1504 lp->tcr_cur_mode |= TCR_MON_CSN;
1505
1506 /* reset the hardware */
1507 smc_reset(dev);
1508 smc_enable(dev);
1509
1510 /* Configure the PHY, initialize the link state */
1511 if (lp->phy_type != 0)
David Howells6d5aefb2006-12-05 19:36:26 +00001512 smc_phy_configure(&lp->phy_configure);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513 else {
1514 spin_lock_irq(&lp->lock);
1515 smc_10bt_check_media(dev, 1);
1516 spin_unlock_irq(&lp->lock);
1517 }
1518
1519 netif_start_queue(dev);
1520 return 0;
1521}
1522
1523/*
1524 * smc_close
1525 *
1526 * this makes the board clean up everything that it can
1527 * and not talk to the outside world. Caused by
1528 * an 'ifconfig ethX down'
1529 */
1530static int smc_close(struct net_device *dev)
1531{
1532 struct smc_local *lp = netdev_priv(dev);
1533
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001534 DBG(2, "%s: %s\n", dev->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
1536 netif_stop_queue(dev);
1537 netif_carrier_off(dev);
1538
1539 /* clear everything */
1540 smc_shutdown(dev);
Nicolas Pitrebe836682005-06-19 23:56:21 -04001541 tasklet_kill(&lp->tx_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542 smc_phy_powerdown(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 return 0;
1544}
1545
1546/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547 * Ethtool support
1548 */
1549static int
1550smc_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1551{
1552 struct smc_local *lp = netdev_priv(dev);
1553 int ret;
1554
1555 cmd->maxtxpkt = 1;
1556 cmd->maxrxpkt = 1;
1557
1558 if (lp->phy_type != 0) {
1559 spin_lock_irq(&lp->lock);
1560 ret = mii_ethtool_gset(&lp->mii, cmd);
1561 spin_unlock_irq(&lp->lock);
1562 } else {
1563 cmd->supported = SUPPORTED_10baseT_Half |
1564 SUPPORTED_10baseT_Full |
1565 SUPPORTED_TP | SUPPORTED_AUI;
1566
1567 if (lp->ctl_rspeed == 10)
1568 cmd->speed = SPEED_10;
1569 else if (lp->ctl_rspeed == 100)
1570 cmd->speed = SPEED_100;
1571
1572 cmd->autoneg = AUTONEG_DISABLE;
1573 cmd->transceiver = XCVR_INTERNAL;
1574 cmd->port = 0;
1575 cmd->duplex = lp->tcr_cur_mode & TCR_SWFDUP ? DUPLEX_FULL : DUPLEX_HALF;
1576
1577 ret = 0;
1578 }
1579
1580 return ret;
1581}
1582
1583static int
1584smc_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1585{
1586 struct smc_local *lp = netdev_priv(dev);
1587 int ret;
1588
1589 if (lp->phy_type != 0) {
1590 spin_lock_irq(&lp->lock);
1591 ret = mii_ethtool_sset(&lp->mii, cmd);
1592 spin_unlock_irq(&lp->lock);
1593 } else {
1594 if (cmd->autoneg != AUTONEG_DISABLE ||
1595 cmd->speed != SPEED_10 ||
1596 (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1597 (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1598 return -EINVAL;
1599
1600// lp->port = cmd->port;
1601 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1602
1603// if (netif_running(dev))
1604// smc_set_port(dev);
1605
1606 ret = 0;
1607 }
1608
1609 return ret;
1610}
1611
1612static void
1613smc_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1614{
1615 strncpy(info->driver, CARDNAME, sizeof(info->driver));
1616 strncpy(info->version, version, sizeof(info->version));
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08001617 strncpy(info->bus_info, dev_name(dev->dev.parent), sizeof(info->bus_info));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618}
1619
1620static int smc_ethtool_nwayreset(struct net_device *dev)
1621{
1622 struct smc_local *lp = netdev_priv(dev);
1623 int ret = -EINVAL;
1624
1625 if (lp->phy_type != 0) {
1626 spin_lock_irq(&lp->lock);
1627 ret = mii_nway_restart(&lp->mii);
1628 spin_unlock_irq(&lp->lock);
1629 }
1630
1631 return ret;
1632}
1633
1634static u32 smc_ethtool_getmsglevel(struct net_device *dev)
1635{
1636 struct smc_local *lp = netdev_priv(dev);
1637 return lp->msg_enable;
1638}
1639
1640static void smc_ethtool_setmsglevel(struct net_device *dev, u32 level)
1641{
1642 struct smc_local *lp = netdev_priv(dev);
1643 lp->msg_enable = level;
1644}
1645
Vernon Sauder357fe2c2009-01-16 13:23:19 +00001646static int smc_write_eeprom_word(struct net_device *dev, u16 addr, u16 word)
1647{
1648 u16 ctl;
1649 struct smc_local *lp = netdev_priv(dev);
1650 void __iomem *ioaddr = lp->base;
1651
1652 spin_lock_irq(&lp->lock);
1653 /* load word into GP register */
1654 SMC_SELECT_BANK(lp, 1);
1655 SMC_SET_GP(lp, word);
1656 /* set the address to put the data in EEPROM */
1657 SMC_SELECT_BANK(lp, 2);
1658 SMC_SET_PTR(lp, addr);
1659 /* tell it to write */
1660 SMC_SELECT_BANK(lp, 1);
1661 ctl = SMC_GET_CTL(lp);
1662 SMC_SET_CTL(lp, ctl | (CTL_EEPROM_SELECT | CTL_STORE));
1663 /* wait for it to finish */
1664 do {
1665 udelay(1);
1666 } while (SMC_GET_CTL(lp) & CTL_STORE);
1667 /* clean up */
1668 SMC_SET_CTL(lp, ctl);
1669 SMC_SELECT_BANK(lp, 2);
1670 spin_unlock_irq(&lp->lock);
1671 return 0;
1672}
1673
1674static int smc_read_eeprom_word(struct net_device *dev, u16 addr, u16 *word)
1675{
1676 u16 ctl;
1677 struct smc_local *lp = netdev_priv(dev);
1678 void __iomem *ioaddr = lp->base;
1679
1680 spin_lock_irq(&lp->lock);
1681 /* set the EEPROM address to get the data from */
1682 SMC_SELECT_BANK(lp, 2);
1683 SMC_SET_PTR(lp, addr | PTR_READ);
1684 /* tell it to load */
1685 SMC_SELECT_BANK(lp, 1);
1686 SMC_SET_GP(lp, 0xffff); /* init to known */
1687 ctl = SMC_GET_CTL(lp);
1688 SMC_SET_CTL(lp, ctl | (CTL_EEPROM_SELECT | CTL_RELOAD));
1689 /* wait for it to finish */
1690 do {
1691 udelay(1);
1692 } while (SMC_GET_CTL(lp) & CTL_RELOAD);
1693 /* read word from GP register */
1694 *word = SMC_GET_GP(lp);
1695 /* clean up */
1696 SMC_SET_CTL(lp, ctl);
1697 SMC_SELECT_BANK(lp, 2);
1698 spin_unlock_irq(&lp->lock);
1699 return 0;
1700}
1701
1702static int smc_ethtool_geteeprom_len(struct net_device *dev)
1703{
1704 return 0x23 * 2;
1705}
1706
1707static int smc_ethtool_geteeprom(struct net_device *dev,
1708 struct ethtool_eeprom *eeprom, u8 *data)
1709{
1710 int i;
1711 int imax;
1712
1713 DBG(1, "Reading %d bytes at %d(0x%x)\n",
1714 eeprom->len, eeprom->offset, eeprom->offset);
1715 imax = smc_ethtool_geteeprom_len(dev);
1716 for (i = 0; i < eeprom->len; i += 2) {
1717 int ret;
1718 u16 wbuf;
1719 int offset = i + eeprom->offset;
1720 if (offset > imax)
1721 break;
1722 ret = smc_read_eeprom_word(dev, offset >> 1, &wbuf);
1723 if (ret != 0)
1724 return ret;
1725 DBG(2, "Read 0x%x from 0x%x\n", wbuf, offset >> 1);
1726 data[i] = (wbuf >> 8) & 0xff;
1727 data[i+1] = wbuf & 0xff;
1728 }
1729 return 0;
1730}
1731
1732static int smc_ethtool_seteeprom(struct net_device *dev,
1733 struct ethtool_eeprom *eeprom, u8 *data)
1734{
1735 int i;
1736 int imax;
1737
1738 DBG(1, "Writing %d bytes to %d(0x%x)\n",
1739 eeprom->len, eeprom->offset, eeprom->offset);
1740 imax = smc_ethtool_geteeprom_len(dev);
1741 for (i = 0; i < eeprom->len; i += 2) {
1742 int ret;
1743 u16 wbuf;
1744 int offset = i + eeprom->offset;
1745 if (offset > imax)
1746 break;
1747 wbuf = (data[i] << 8) | data[i + 1];
1748 DBG(2, "Writing 0x%x to 0x%x\n", wbuf, offset >> 1);
1749 ret = smc_write_eeprom_word(dev, offset >> 1, wbuf);
1750 if (ret != 0)
1751 return ret;
1752 }
1753 return 0;
1754}
1755
1756
Jeff Garzik7282d492006-09-13 14:30:00 -04001757static const struct ethtool_ops smc_ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758 .get_settings = smc_ethtool_getsettings,
1759 .set_settings = smc_ethtool_setsettings,
1760 .get_drvinfo = smc_ethtool_getdrvinfo,
1761
1762 .get_msglevel = smc_ethtool_getmsglevel,
1763 .set_msglevel = smc_ethtool_setmsglevel,
1764 .nway_reset = smc_ethtool_nwayreset,
1765 .get_link = ethtool_op_get_link,
Vernon Sauder357fe2c2009-01-16 13:23:19 +00001766 .get_eeprom_len = smc_ethtool_geteeprom_len,
1767 .get_eeprom = smc_ethtool_geteeprom,
1768 .set_eeprom = smc_ethtool_seteeprom,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769};
1770
Magnus Damma5280792009-01-26 21:32:25 -08001771static const struct net_device_ops smc_netdev_ops = {
1772 .ndo_open = smc_open,
1773 .ndo_stop = smc_close,
1774 .ndo_start_xmit = smc_hard_start_xmit,
1775 .ndo_tx_timeout = smc_timeout,
1776 .ndo_set_multicast_list = smc_set_multicast_list,
Ben Hutchings635ecaa2009-07-09 17:59:01 +00001777 .ndo_change_mtu = eth_change_mtu,
Magnus Damma5280792009-01-26 21:32:25 -08001778 .ndo_validate_addr = eth_validate_addr,
1779 .ndo_set_mac_address = eth_mac_addr,
1780#ifdef CONFIG_NET_POLL_CONTROLLER
1781 .ndo_poll_controller = smc_poll_controller,
1782#endif
1783};
1784
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785/*
1786 * smc_findirq
1787 *
1788 * This routine has a simple purpose -- make the SMC chip generate an
1789 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1790 */
1791/*
1792 * does this still work?
1793 *
1794 * I just deleted auto_irq.c, since it was never built...
1795 * --jgarzik
1796 */
Al Virof57628d2008-11-22 17:36:14 +00001797static int __devinit smc_findirq(struct smc_local *lp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798{
Magnus Dammcfdfa862008-02-22 19:55:05 +09001799 void __iomem *ioaddr = lp->base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800 int timeout = 20;
1801 unsigned long cookie;
1802
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001803 DBG(2, "%s: %s\n", CARDNAME, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804
1805 cookie = probe_irq_on();
1806
1807 /*
1808 * What I try to do here is trigger an ALLOC_INT. This is done
1809 * by allocating a small chunk of memory, which will give an interrupt
1810 * when done.
1811 */
1812 /* enable ALLOCation interrupts ONLY */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001813 SMC_SELECT_BANK(lp, 2);
1814 SMC_SET_INT_MASK(lp, IM_ALLOC_INT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001815
1816 /*
1817 * Allocate 512 bytes of memory. Note that the chip was just
1818 * reset so all the memory is available
1819 */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001820 SMC_SET_MMU_CMD(lp, MC_ALLOC | 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821
1822 /*
1823 * Wait until positive that the interrupt has been generated
1824 */
1825 do {
1826 int int_status;
1827 udelay(10);
Magnus Dammcfdfa862008-02-22 19:55:05 +09001828 int_status = SMC_GET_INT(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829 if (int_status & IM_ALLOC_INT)
1830 break; /* got the interrupt */
1831 } while (--timeout);
1832
1833 /*
1834 * there is really nothing that I can do here if timeout fails,
1835 * as autoirq_report will return a 0 anyway, which is what I
1836 * want in this case. Plus, the clean up is needed in both
1837 * cases.
1838 */
1839
1840 /* and disable all interrupts again */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001841 SMC_SET_INT_MASK(lp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842
1843 /* and return what I found */
1844 return probe_irq_off(cookie);
1845}
1846
1847/*
1848 * Function: smc_probe(unsigned long ioaddr)
1849 *
1850 * Purpose:
1851 * Tests to see if a given ioaddr points to an SMC91x chip.
1852 * Returns a 0 on success
1853 *
1854 * Algorithm:
1855 * (1) see if the high byte of BANK_SELECT is 0x33
1856 * (2) compare the ioaddr with the base register's address
1857 * (3) see if I recognize the chip ID in the appropriate register
1858 *
1859 * Here I do typical initialization tasks.
1860 *
1861 * o Initialize the structure if needed
1862 * o print out my vanity message if not done so already
1863 * o print out what type of hardware is detected
1864 * o print out the ethernet address
1865 * o find the IRQ
1866 * o set up my private data
1867 * o configure the dev structure with my subroutines
1868 * o actually GRAB the irq.
1869 * o GRAB the region
1870 */
Al Virof57628d2008-11-22 17:36:14 +00001871static int __devinit smc_probe(struct net_device *dev, void __iomem *ioaddr,
Russell Kinge7b3dc72008-01-14 22:30:10 +00001872 unsigned long irq_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873{
1874 struct smc_local *lp = netdev_priv(dev);
1875 static int version_printed = 0;
Joe Perches0795af52007-10-03 17:59:30 -07001876 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877 unsigned int val, revision_register;
1878 const char *version_string;
1879
Harvey Harrisonb39d66a2008-08-20 16:52:04 -07001880 DBG(2, "%s: %s\n", CARDNAME, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881
1882 /* First, see if the high byte is 0x33 */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001883 val = SMC_CURRENT_BANK(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884 DBG(2, "%s: bank signature probe returned 0x%04x\n", CARDNAME, val);
1885 if ((val & 0xFF00) != 0x3300) {
1886 if ((val & 0xFF) == 0x33) {
1887 printk(KERN_WARNING
1888 "%s: Detected possible byte-swapped interface"
1889 " at IOADDR %p\n", CARDNAME, ioaddr);
1890 }
1891 retval = -ENODEV;
1892 goto err_out;
1893 }
1894
1895 /*
1896 * The above MIGHT indicate a device, but I need to write to
1897 * further test this.
1898 */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001899 SMC_SELECT_BANK(lp, 0);
1900 val = SMC_CURRENT_BANK(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901 if ((val & 0xFF00) != 0x3300) {
1902 retval = -ENODEV;
1903 goto err_out;
1904 }
1905
1906 /*
1907 * well, we've already written once, so hopefully another
1908 * time won't hurt. This time, I need to switch the bank
1909 * register to bank 1, so I can access the base address
1910 * register
1911 */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001912 SMC_SELECT_BANK(lp, 1);
1913 val = SMC_GET_BASE(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 val = ((val & 0x1F00) >> 3) << SMC_IO_SHIFT;
Nicolas Pitre53155102005-05-12 20:18:19 -04001915 if (((unsigned int)ioaddr & (0x3e0 << SMC_IO_SHIFT)) != val) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916 printk("%s: IOADDR %p doesn't match configuration (%x).\n",
1917 CARDNAME, ioaddr, val);
1918 }
1919
1920 /*
1921 * check if the revision register is something that I
1922 * recognize. These might need to be added to later,
1923 * as future revisions could be added.
1924 */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001925 SMC_SELECT_BANK(lp, 3);
1926 revision_register = SMC_GET_REV(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927 DBG(2, "%s: revision = 0x%04x\n", CARDNAME, revision_register);
1928 version_string = chip_ids[ (revision_register >> 4) & 0xF];
1929 if (!version_string || (revision_register & 0xff00) != 0x3300) {
1930 /* I don't recognize this chip, so... */
1931 printk("%s: IO %p: Unrecognized revision register 0x%04x"
1932 ", Contact author.\n", CARDNAME,
1933 ioaddr, revision_register);
1934
1935 retval = -ENODEV;
1936 goto err_out;
1937 }
1938
1939 /* At this point I'll assume that the chip is an SMC91x. */
1940 if (version_printed++ == 0)
1941 printk("%s", version);
1942
1943 /* fill in some of the fields */
1944 dev->base_addr = (unsigned long)ioaddr;
1945 lp->base = ioaddr;
1946 lp->version = revision_register & 0xff;
1947 spin_lock_init(&lp->lock);
1948
1949 /* Get the MAC address */
Magnus Dammcfdfa862008-02-22 19:55:05 +09001950 SMC_SELECT_BANK(lp, 1);
1951 SMC_GET_MAC_ADDR(lp, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952
1953 /* now, reset the chip, and put it into a known state */
1954 smc_reset(dev);
1955
1956 /*
1957 * If dev->irq is 0, then the device has to be banged on to see
1958 * what the IRQ is.
1959 *
1960 * This banging doesn't always detect the IRQ, for unknown reasons.
1961 * a workaround is to reset the chip and try again.
1962 *
1963 * Interestingly, the DOS packet driver *SETS* the IRQ on the card to
1964 * be what is requested on the command line. I don't do that, mostly
1965 * because the card that I have uses a non-standard method of accessing
1966 * the IRQs, and because this _should_ work in most configurations.
1967 *
1968 * Specifying an IRQ is done with the assumption that the user knows
1969 * what (s)he is doing. No checking is done!!!!
1970 */
1971 if (dev->irq < 1) {
1972 int trials;
1973
1974 trials = 3;
1975 while (trials--) {
Magnus Dammcfdfa862008-02-22 19:55:05 +09001976 dev->irq = smc_findirq(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 if (dev->irq)
1978 break;
1979 /* kick the card and try again */
1980 smc_reset(dev);
1981 }
1982 }
1983 if (dev->irq == 0) {
1984 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
1985 dev->name);
1986 retval = -ENODEV;
1987 goto err_out;
1988 }
1989 dev->irq = irq_canonicalize(dev->irq);
1990
1991 /* Fill in the fields of the device structure with ethernet values. */
1992 ether_setup(dev);
1993
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994 dev->watchdog_timeo = msecs_to_jiffies(watchdog);
Magnus Damma5280792009-01-26 21:32:25 -08001995 dev->netdev_ops = &smc_netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996 dev->ethtool_ops = &smc_ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997
1998 tasklet_init(&lp->tx_task, smc_hardware_send_pkt, (unsigned long)dev);
David Howells6d5aefb2006-12-05 19:36:26 +00001999 INIT_WORK(&lp->phy_configure, smc_phy_configure);
2000 lp->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002001 lp->mii.phy_id_mask = 0x1f;
2002 lp->mii.reg_num_mask = 0x1f;
2003 lp->mii.force_media = 0;
2004 lp->mii.full_duplex = 0;
2005 lp->mii.dev = dev;
2006 lp->mii.mdio_read = smc_phy_read;
2007 lp->mii.mdio_write = smc_phy_write;
2008
2009 /*
2010 * Locate the phy, if any.
2011 */
2012 if (lp->version >= (CHIP_91100 << 4))
2013 smc_phy_detect(dev);
2014
Nicolas Pitre99e1baf2005-10-05 11:10:24 -04002015 /* then shut everything down to save power */
2016 smc_shutdown(dev);
2017 smc_phy_powerdown(dev);
2018
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019 /* Set default parameters */
2020 lp->msg_enable = NETIF_MSG_LINK;
2021 lp->ctl_rfduplx = 0;
2022 lp->ctl_rspeed = 10;
2023
2024 if (lp->version >= (CHIP_91100 << 4)) {
2025 lp->ctl_rfduplx = 1;
2026 lp->ctl_rspeed = 100;
2027 }
2028
2029 /* Grab the IRQ */
Russell Kinge7b3dc72008-01-14 22:30:10 +00002030 retval = request_irq(dev->irq, &smc_interrupt, irq_flags, dev->name, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002031 if (retval)
2032 goto err_out;
2033
Eric Miao52256c02008-06-24 15:36:05 +08002034#ifdef CONFIG_ARCH_PXA
2035# ifdef SMC_USE_PXA_DMA
2036 lp->cfg.flags |= SMC91X_USE_DMA;
2037# endif
2038 if (lp->cfg.flags & SMC91X_USE_DMA) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039 int dma = pxa_request_dma(dev->name, DMA_PRIO_LOW,
2040 smc_pxa_dma_irq, NULL);
2041 if (dma >= 0)
2042 dev->dma = dma;
2043 }
2044#endif
2045
2046 retval = register_netdev(dev);
2047 if (retval == 0) {
2048 /* now, print out the card info, in a short format.. */
2049 printk("%s: %s (rev %d) at %p IRQ %d",
2050 dev->name, version_string, revision_register & 0x0f,
2051 lp->base, dev->irq);
2052
2053 if (dev->dma != (unsigned char)-1)
2054 printk(" DMA %d", dev->dma);
2055
Magnus Dammd6bc3722008-09-08 14:02:56 +09002056 printk("%s%s\n",
2057 lp->cfg.flags & SMC91X_NOWAIT ? " [nowait]" : "",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 THROTTLE_TX_PKTS ? " [throttle_tx]" : "");
2059
2060 if (!is_valid_ether_addr(dev->dev_addr)) {
2061 printk("%s: Invalid ethernet MAC address. Please "
2062 "set using ifconfig\n", dev->name);
2063 } else {
2064 /* Print the Ethernet address */
Johannes Berge1749612008-10-27 15:59:26 -07002065 printk("%s: Ethernet addr: %pM\n",
2066 dev->name, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002067 }
2068
2069 if (lp->phy_type == 0) {
2070 PRINTK("%s: No PHY found\n", dev->name);
2071 } else if ((lp->phy_type & 0xfffffff0) == 0x0016f840) {
2072 PRINTK("%s: PHY LAN83C183 (LAN91C111 Internal)\n", dev->name);
2073 } else if ((lp->phy_type & 0xfffffff0) == 0x02821c50) {
2074 PRINTK("%s: PHY LAN83C180\n", dev->name);
2075 }
2076 }
2077
2078err_out:
Eric Miao52256c02008-06-24 15:36:05 +08002079#ifdef CONFIG_ARCH_PXA
Linus Torvalds1da177e2005-04-16 15:20:36 -07002080 if (retval && dev->dma != (unsigned char)-1)
2081 pxa_free_dma(dev->dma);
2082#endif
2083 return retval;
2084}
2085
2086static int smc_enable_device(struct platform_device *pdev)
2087{
Magnus Damm3e947942008-02-22 19:55:15 +09002088 struct net_device *ndev = platform_get_drvdata(pdev);
2089 struct smc_local *lp = netdev_priv(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090 unsigned long flags;
2091 unsigned char ecor, ecsr;
2092 void __iomem *addr;
2093 struct resource * res;
2094
2095 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
2096 if (!res)
2097 return 0;
2098
2099 /*
2100 * Map the attribute space. This is overkill, but clean.
2101 */
2102 addr = ioremap(res->start, ATTRIB_SIZE);
2103 if (!addr)
2104 return -ENOMEM;
2105
2106 /*
2107 * Reset the device. We must disable IRQs around this
2108 * since a reset causes the IRQ line become active.
2109 */
2110 local_irq_save(flags);
2111 ecor = readb(addr + (ECOR << SMC_IO_SHIFT)) & ~ECOR_RESET;
2112 writeb(ecor | ECOR_RESET, addr + (ECOR << SMC_IO_SHIFT));
2113 readb(addr + (ECOR << SMC_IO_SHIFT));
2114
2115 /*
2116 * Wait 100us for the chip to reset.
2117 */
2118 udelay(100);
2119
2120 /*
2121 * The device will ignore all writes to the enable bit while
2122 * reset is asserted, even if the reset bit is cleared in the
2123 * same write. Must clear reset first, then enable the device.
2124 */
2125 writeb(ecor, addr + (ECOR << SMC_IO_SHIFT));
2126 writeb(ecor | ECOR_ENABLE, addr + (ECOR << SMC_IO_SHIFT));
2127
2128 /*
2129 * Set the appropriate byte/word mode.
2130 */
2131 ecsr = readb(addr + (ECSR << SMC_IO_SHIFT)) & ~ECSR_IOIS8;
Magnus Damm3e947942008-02-22 19:55:15 +09002132 if (!SMC_16BIT(lp))
Nicolas Pitre09779c62006-03-20 11:54:27 -05002133 ecsr |= ECSR_IOIS8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134 writeb(ecsr, addr + (ECSR << SMC_IO_SHIFT));
2135 local_irq_restore(flags);
2136
2137 iounmap(addr);
2138
2139 /*
2140 * Wait for the chip to wake up. We could poll the control
2141 * register in the main register space, but that isn't mapped
2142 * yet. We know this is going to take 750us.
2143 */
2144 msleep(1);
2145
2146 return 0;
2147}
2148
Eric Miao15919882008-06-24 13:38:50 +08002149static int smc_request_attrib(struct platform_device *pdev,
2150 struct net_device *ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151{
2152 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
David S. Miller55c8eb62008-11-03 00:04:24 -08002153 struct smc_local *lp __maybe_unused = netdev_priv(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154
2155 if (!res)
2156 return 0;
2157
2158 if (!request_mem_region(res->start, ATTRIB_SIZE, CARDNAME))
2159 return -EBUSY;
2160
2161 return 0;
2162}
2163
Eric Miao15919882008-06-24 13:38:50 +08002164static void smc_release_attrib(struct platform_device *pdev,
2165 struct net_device *ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166{
2167 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib");
David S. Miller55c8eb62008-11-03 00:04:24 -08002168 struct smc_local *lp __maybe_unused = netdev_priv(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169
2170 if (res)
2171 release_mem_region(res->start, ATTRIB_SIZE);
2172}
2173
Nicolas Pitre09779c62006-03-20 11:54:27 -05002174static inline void smc_request_datacs(struct platform_device *pdev, struct net_device *ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175{
Nicolas Pitre09779c62006-03-20 11:54:27 -05002176 if (SMC_CAN_USE_DATACS) {
2177 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32");
2178 struct smc_local *lp = netdev_priv(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002179
Nicolas Pitre09779c62006-03-20 11:54:27 -05002180 if (!res)
2181 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182
Nicolas Pitre09779c62006-03-20 11:54:27 -05002183 if(!request_mem_region(res->start, SMC_DATA_EXTENT, CARDNAME)) {
2184 printk(KERN_INFO "%s: failed to request datacs memory region.\n", CARDNAME);
2185 return;
2186 }
2187
2188 lp->datacs = ioremap(res->start, SMC_DATA_EXTENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002190}
2191
2192static void smc_release_datacs(struct platform_device *pdev, struct net_device *ndev)
2193{
Nicolas Pitre09779c62006-03-20 11:54:27 -05002194 if (SMC_CAN_USE_DATACS) {
2195 struct smc_local *lp = netdev_priv(ndev);
2196 struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-data32");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197
Nicolas Pitre09779c62006-03-20 11:54:27 -05002198 if (lp->datacs)
2199 iounmap(lp->datacs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002200
Nicolas Pitre09779c62006-03-20 11:54:27 -05002201 lp->datacs = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202
Nicolas Pitre09779c62006-03-20 11:54:27 -05002203 if (res)
2204 release_mem_region(res->start, SMC_DATA_EXTENT);
2205 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207
2208/*
2209 * smc_init(void)
2210 * Input parameters:
2211 * dev->base_addr == 0, try to find all possible locations
2212 * dev->base_addr > 0x1ff, this is the address to check
2213 * dev->base_addr == <anything else>, return failure code
2214 *
2215 * Output:
2216 * 0 --> there is a device
2217 * anything else, error
2218 */
Al Virof57628d2008-11-22 17:36:14 +00002219static int __devinit smc_drv_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220{
Magnus Damm3e947942008-02-22 19:55:15 +09002221 struct smc91x_platdata *pd = pdev->dev.platform_data;
2222 struct smc_local *lp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223 struct net_device *ndev;
Russell Kinge7b3dc72008-01-14 22:30:10 +00002224 struct resource *res, *ires;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225 unsigned int __iomem *addr;
Eric Miaod280ead2008-06-06 17:13:02 +08002226 unsigned long irq_flags = SMC_IRQ_FLAGS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227 int ret;
2228
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 ndev = alloc_etherdev(sizeof(struct smc_local));
2230 if (!ndev) {
2231 printk("%s: could not allocate device.\n", CARDNAME);
2232 ret = -ENOMEM;
Eric Miao15919882008-06-24 13:38:50 +08002233 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234 }
Russell King3ae5eae2005-11-09 22:32:44 +00002235 SET_NETDEV_DEV(ndev, &pdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236
Magnus Damm3e947942008-02-22 19:55:15 +09002237 /* get configuration from platform data, only allow use of
2238 * bus width if both SMC_CAN_USE_xxx and SMC91X_USE_xxx are set.
2239 */
2240
2241 lp = netdev_priv(ndev);
Magnus Damm3e947942008-02-22 19:55:15 +09002242
Eric Miao15919882008-06-24 13:38:50 +08002243 if (pd) {
Magnus Damm3e947942008-02-22 19:55:15 +09002244 memcpy(&lp->cfg, pd, sizeof(lp->cfg));
Eric Miao15919882008-06-24 13:38:50 +08002245 lp->io_shift = SMC91X_IO_SHIFT(lp->cfg.flags);
2246 } else {
Eric Miaofa6d3be2008-06-19 17:19:57 +08002247 lp->cfg.flags |= (SMC_CAN_USE_8BIT) ? SMC91X_USE_8BIT : 0;
2248 lp->cfg.flags |= (SMC_CAN_USE_16BIT) ? SMC91X_USE_16BIT : 0;
2249 lp->cfg.flags |= (SMC_CAN_USE_32BIT) ? SMC91X_USE_32BIT : 0;
Eric Miaoc4f0e762008-06-19 17:39:03 +08002250 lp->cfg.flags |= (nowait) ? SMC91X_NOWAIT : 0;
Magnus Damm3e947942008-02-22 19:55:15 +09002251 }
2252
Russell Kingb0dbcf52008-09-04 21:13:37 +01002253 if (!lp->cfg.leda && !lp->cfg.ledb) {
2254 lp->cfg.leda = RPC_LSA_DEFAULT;
2255 lp->cfg.ledb = RPC_LSB_DEFAULT;
2256 }
2257
Linus Torvalds1da177e2005-04-16 15:20:36 -07002258 ndev->dma = (unsigned char)-1;
Russell Kinge7b3dc72008-01-14 22:30:10 +00002259
Eric Miao15919882008-06-24 13:38:50 +08002260 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
2261 if (!res)
2262 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2263 if (!res) {
2264 ret = -ENODEV;
2265 goto out_free_netdev;
2266 }
2267
2268
2269 if (!request_mem_region(res->start, SMC_IO_EXTENT, CARDNAME)) {
2270 ret = -EBUSY;
2271 goto out_free_netdev;
2272 }
2273
Russell Kinge7b3dc72008-01-14 22:30:10 +00002274 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2275 if (!ires) {
David Vrabel48944732006-01-19 17:56:29 +00002276 ret = -ENODEV;
Eric Miao15919882008-06-24 13:38:50 +08002277 goto out_release_io;
David Vrabel48944732006-01-19 17:56:29 +00002278 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002279
Russell Kinge7b3dc72008-01-14 22:30:10 +00002280 ndev->irq = ires->start;
Eric Miaod280ead2008-06-06 17:13:02 +08002281
2282 if (ires->flags & IRQF_TRIGGER_MASK)
2283 irq_flags = ires->flags & IRQF_TRIGGER_MASK;
Russell Kinge7b3dc72008-01-14 22:30:10 +00002284
Eric Miao15919882008-06-24 13:38:50 +08002285 ret = smc_request_attrib(pdev, ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002286 if (ret)
Eric Miao15919882008-06-24 13:38:50 +08002287 goto out_release_io;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288#if defined(CONFIG_SA1100_ASSABET)
2289 NCR_0 |= NCR_ENET_OSC_EN;
2290#endif
Magnus Damm3e947942008-02-22 19:55:15 +09002291 platform_set_drvdata(pdev, ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292 ret = smc_enable_device(pdev);
2293 if (ret)
2294 goto out_release_attrib;
2295
2296 addr = ioremap(res->start, SMC_IO_EXTENT);
2297 if (!addr) {
2298 ret = -ENOMEM;
2299 goto out_release_attrib;
2300 }
2301
Eric Miao52256c02008-06-24 15:36:05 +08002302#ifdef CONFIG_ARCH_PXA
Russell King073ac8f2007-09-01 21:27:18 +01002303 {
2304 struct smc_local *lp = netdev_priv(ndev);
2305 lp->device = &pdev->dev;
2306 lp->physaddr = res->start;
2307 }
2308#endif
2309
Eric Miaod280ead2008-06-06 17:13:02 +08002310 ret = smc_probe(ndev, addr, irq_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002311 if (ret != 0)
2312 goto out_iounmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313
2314 smc_request_datacs(pdev, ndev);
2315
2316 return 0;
2317
2318 out_iounmap:
Russell King3ae5eae2005-11-09 22:32:44 +00002319 platform_set_drvdata(pdev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002320 iounmap(addr);
2321 out_release_attrib:
Eric Miao15919882008-06-24 13:38:50 +08002322 smc_release_attrib(pdev, ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002323 out_release_io:
2324 release_mem_region(res->start, SMC_IO_EXTENT);
Eric Miao15919882008-06-24 13:38:50 +08002325 out_free_netdev:
2326 free_netdev(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002327 out:
2328 printk("%s: not found (%d).\n", CARDNAME, ret);
2329
2330 return ret;
2331}
2332
Al Virof57628d2008-11-22 17:36:14 +00002333static int __devexit smc_drv_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002334{
Russell King3ae5eae2005-11-09 22:32:44 +00002335 struct net_device *ndev = platform_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002336 struct smc_local *lp = netdev_priv(ndev);
2337 struct resource *res;
2338
Russell King3ae5eae2005-11-09 22:32:44 +00002339 platform_set_drvdata(pdev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340
2341 unregister_netdev(ndev);
2342
2343 free_irq(ndev->irq, ndev);
2344
Eric Miao52256c02008-06-24 15:36:05 +08002345#ifdef CONFIG_ARCH_PXA
Linus Torvalds1da177e2005-04-16 15:20:36 -07002346 if (ndev->dma != (unsigned char)-1)
2347 pxa_free_dma(ndev->dma);
2348#endif
2349 iounmap(lp->base);
2350
2351 smc_release_datacs(pdev,ndev);
Eric Miao15919882008-06-24 13:38:50 +08002352 smc_release_attrib(pdev,ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353
2354 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
2355 if (!res)
Jeff Garzik6fc30db2008-08-27 05:54:30 -04002356 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002357 release_mem_region(res->start, SMC_IO_EXTENT);
2358
2359 free_netdev(ndev);
2360
2361 return 0;
2362}
2363
Russell King3ae5eae2005-11-09 22:32:44 +00002364static int smc_drv_suspend(struct platform_device *dev, pm_message_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365{
Russell King3ae5eae2005-11-09 22:32:44 +00002366 struct net_device *ndev = platform_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002367
Russell King9480e302005-10-28 09:52:56 -07002368 if (ndev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369 if (netif_running(ndev)) {
2370 netif_device_detach(ndev);
2371 smc_shutdown(ndev);
2372 smc_phy_powerdown(ndev);
2373 }
2374 }
2375 return 0;
2376}
2377
Russell King3ae5eae2005-11-09 22:32:44 +00002378static int smc_drv_resume(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379{
Russell King3ae5eae2005-11-09 22:32:44 +00002380 struct net_device *ndev = platform_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381
Russell King9480e302005-10-28 09:52:56 -07002382 if (ndev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002383 struct smc_local *lp = netdev_priv(ndev);
Russell King3ae5eae2005-11-09 22:32:44 +00002384 smc_enable_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385 if (netif_running(ndev)) {
2386 smc_reset(ndev);
2387 smc_enable(ndev);
2388 if (lp->phy_type != 0)
David Howells6d5aefb2006-12-05 19:36:26 +00002389 smc_phy_configure(&lp->phy_configure);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390 netif_device_attach(ndev);
2391 }
2392 }
2393 return 0;
2394}
2395
Russell King3ae5eae2005-11-09 22:32:44 +00002396static struct platform_driver smc_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002397 .probe = smc_drv_probe,
Al Virof57628d2008-11-22 17:36:14 +00002398 .remove = __devexit_p(smc_drv_remove),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002399 .suspend = smc_drv_suspend,
2400 .resume = smc_drv_resume,
Russell King3ae5eae2005-11-09 22:32:44 +00002401 .driver = {
2402 .name = CARDNAME,
Kay Sievers72abb462008-04-18 13:50:44 -07002403 .owner = THIS_MODULE,
Russell King3ae5eae2005-11-09 22:32:44 +00002404 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07002405};
2406
2407static int __init smc_init(void)
2408{
Russell King3ae5eae2005-11-09 22:32:44 +00002409 return platform_driver_register(&smc_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002410}
2411
2412static void __exit smc_cleanup(void)
2413{
Russell King3ae5eae2005-11-09 22:32:44 +00002414 platform_driver_unregister(&smc_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002415}
2416
2417module_init(smc_init);
2418module_exit(smc_cleanup);