net: Eliminate flush_scheduled_work() calls while RTNL is held.
[safe/jmp/linux-2.6] / drivers / net / smc911x.c
1 /*
2  * smc911x.c
3  * This is a driver for SMSC's LAN911{5,6,7,8} single-chip Ethernet devices.
4  *
5  * Copyright (C) 2005 Sensoria Corp
6  *         Derived from the unified SMC91x driver by Nicolas Pitre
7  *         and the smsc911x.c reference driver by SMSC
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22  *
23  * Arguments:
24  *       watchdog  = TX watchdog timeout
25  *       tx_fifo_kb = Size of TX FIFO in KB
26  *
27  * History:
28  *        04/16/05      Dustin McIntire          Initial version
29  */
30 static const char version[] =
31          "smc911x.c: v1.0 04-16-2005 by Dustin McIntire <dustin@sensoria.com>\n";
32
33 /* Debugging options */
34 #define ENABLE_SMC_DEBUG_RX             0
35 #define ENABLE_SMC_DEBUG_TX             0
36 #define ENABLE_SMC_DEBUG_DMA            0
37 #define ENABLE_SMC_DEBUG_PKTS           0
38 #define ENABLE_SMC_DEBUG_MISC           0
39 #define ENABLE_SMC_DEBUG_FUNC           0
40
41 #define SMC_DEBUG_RX            ((ENABLE_SMC_DEBUG_RX   ? 1 : 0) << 0)
42 #define SMC_DEBUG_TX            ((ENABLE_SMC_DEBUG_TX   ? 1 : 0) << 1)
43 #define SMC_DEBUG_DMA           ((ENABLE_SMC_DEBUG_DMA  ? 1 : 0) << 2)
44 #define SMC_DEBUG_PKTS          ((ENABLE_SMC_DEBUG_PKTS ? 1 : 0) << 3)
45 #define SMC_DEBUG_MISC          ((ENABLE_SMC_DEBUG_MISC ? 1 : 0) << 4)
46 #define SMC_DEBUG_FUNC          ((ENABLE_SMC_DEBUG_FUNC ? 1 : 0) << 5)
47
48 #ifndef SMC_DEBUG
49 #define SMC_DEBUG        ( SMC_DEBUG_RX   | \
50                            SMC_DEBUG_TX   | \
51                            SMC_DEBUG_DMA  | \
52                            SMC_DEBUG_PKTS | \
53                            SMC_DEBUG_MISC | \
54                            SMC_DEBUG_FUNC   \
55                          )
56 #endif
57
58 #include <linux/init.h>
59 #include <linux/module.h>
60 #include <linux/kernel.h>
61 #include <linux/sched.h>
62 #include <linux/slab.h>
63 #include <linux/delay.h>
64 #include <linux/interrupt.h>
65 #include <linux/errno.h>
66 #include <linux/ioport.h>
67 #include <linux/crc32.h>
68 #include <linux/device.h>
69 #include <linux/platform_device.h>
70 #include <linux/spinlock.h>
71 #include <linux/ethtool.h>
72 #include <linux/mii.h>
73 #include <linux/workqueue.h>
74
75 #include <linux/netdevice.h>
76 #include <linux/etherdevice.h>
77 #include <linux/skbuff.h>
78
79 #include <asm/io.h>
80
81 #include "smc911x.h"
82
83 /*
84  * Transmit timeout, default 5 seconds.
85  */
86 static int watchdog = 5000;
87 module_param(watchdog, int, 0400);
88 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
89
90 static int tx_fifo_kb=8;
91 module_param(tx_fifo_kb, int, 0400);
92 MODULE_PARM_DESC(tx_fifo_kb,"transmit FIFO size in KB (1<x<15)(default=8)");
93
94 MODULE_LICENSE("GPL");
95 MODULE_ALIAS("platform:smc911x");
96
97 /*
98  * The internal workings of the driver.  If you are changing anything
99  * here with the SMC stuff, you should have the datasheet and know
100  * what you are doing.
101  */
102 #define CARDNAME "smc911x"
103
104 /*
105  * Use power-down feature of the chip
106  */
107 #define POWER_DOWN               1
108
109
110 /* store this information for the driver.. */
111 struct smc911x_local {
112         /*
113          * If I have to wait until the DMA is finished and ready to reload a
114          * packet, I will store the skbuff here. Then, the DMA will send it
115          * out and free it.
116          */
117         struct sk_buff *pending_tx_skb;
118
119         /* version/revision of the SMC911x chip */
120         u16 version;
121         u16 revision;
122
123         /* FIFO sizes */
124         int tx_fifo_kb;
125         int tx_fifo_size;
126         int rx_fifo_size;
127         int afc_cfg;
128
129         /* Contains the current active receive/phy mode */
130         int ctl_rfduplx;
131         int ctl_rspeed;
132
133         u32 msg_enable;
134         u32 phy_type;
135         struct mii_if_info mii;
136
137         /* work queue */
138         struct work_struct phy_configure;
139
140         int tx_throttle;
141         spinlock_t lock;
142
143         struct net_device *netdev;
144
145 #ifdef SMC_USE_DMA
146         /* DMA needs the physical address of the chip */
147         u_long physaddr;
148         int rxdma;
149         int txdma;
150         int rxdma_active;
151         int txdma_active;
152         struct sk_buff *current_rx_skb;
153         struct sk_buff *current_tx_skb;
154         struct device *dev;
155 #endif
156 };
157
158 #if SMC_DEBUG > 0
159 #define DBG(n, args...)                          \
160         do {                                     \
161                 if (SMC_DEBUG & (n))             \
162                         printk(args);            \
163         } while (0)
164
165 #define PRINTK(args...)   printk(args)
166 #else
167 #define DBG(n, args...)   do { } while (0)
168 #define PRINTK(args...)   printk(KERN_DEBUG args)
169 #endif
170
171 #if SMC_DEBUG_PKTS > 0
172 static void PRINT_PKT(u_char *buf, int length)
173 {
174         int i;
175         int remainder;
176         int lines;
177
178         lines = length / 16;
179         remainder = length % 16;
180
181         for (i = 0; i < lines ; i ++) {
182                 int cur;
183                 for (cur = 0; cur < 8; cur++) {
184                         u_char a, b;
185                         a = *buf++;
186                         b = *buf++;
187                         printk("%02x%02x ", a, b);
188                 }
189                 printk("\n");
190         }
191         for (i = 0; i < remainder/2 ; i++) {
192                 u_char a, b;
193                 a = *buf++;
194                 b = *buf++;
195                 printk("%02x%02x ", a, b);
196         }
197         printk("\n");
198 }
199 #else
200 #define PRINT_PKT(x...)  do { } while (0)
201 #endif
202
203
204 /* this enables an interrupt in the interrupt mask register */
205 #define SMC_ENABLE_INT(x) do {                          \
206         unsigned int  __mask;                           \
207         unsigned long __flags;                          \
208         spin_lock_irqsave(&lp->lock, __flags);          \
209         __mask = SMC_GET_INT_EN();                      \
210         __mask |= (x);                                  \
211         SMC_SET_INT_EN(__mask);                         \
212         spin_unlock_irqrestore(&lp->lock, __flags);     \
213 } while (0)
214
215 /* this disables an interrupt from the interrupt mask register */
216 #define SMC_DISABLE_INT(x) do {                         \
217         unsigned int  __mask;                           \
218         unsigned long __flags;                          \
219         spin_lock_irqsave(&lp->lock, __flags);          \
220         __mask = SMC_GET_INT_EN();                      \
221         __mask &= ~(x);                                 \
222         SMC_SET_INT_EN(__mask);                         \
223         spin_unlock_irqrestore(&lp->lock, __flags);     \
224 } while (0)
225
226 /*
227  * this does a soft reset on the device
228  */
229 static void smc911x_reset(struct net_device *dev)
230 {
231         unsigned long ioaddr = dev->base_addr;
232         struct smc911x_local *lp = netdev_priv(dev);
233         unsigned int reg, timeout=0, resets=1;
234         unsigned long flags;
235
236         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
237
238         /*       Take out of PM setting first */
239         if ((SMC_GET_PMT_CTRL() & PMT_CTRL_READY_) == 0) {
240                 /* Write to the bytetest will take out of powerdown */
241                 SMC_SET_BYTE_TEST(0);
242                 timeout=10;
243                 do {
244                         udelay(10);
245                         reg = SMC_GET_PMT_CTRL() & PMT_CTRL_READY_;
246                 } while (--timeout && !reg);
247                 if (timeout == 0) {
248                         PRINTK("%s: smc911x_reset timeout waiting for PM restore\n", dev->name);
249                         return;
250                 }
251         }
252
253         /* Disable all interrupts */
254         spin_lock_irqsave(&lp->lock, flags);
255         SMC_SET_INT_EN(0);
256         spin_unlock_irqrestore(&lp->lock, flags);
257
258         while (resets--) {
259                 SMC_SET_HW_CFG(HW_CFG_SRST_);
260                 timeout=10;
261                 do {
262                         udelay(10);
263                         reg = SMC_GET_HW_CFG();
264                         /* If chip indicates reset timeout then try again */
265                         if (reg & HW_CFG_SRST_TO_) {
266                                 PRINTK("%s: chip reset timeout, retrying...\n", dev->name);
267                                 resets++;
268                                 break;
269                         }
270                 } while (--timeout && (reg & HW_CFG_SRST_));
271         }
272         if (timeout == 0) {
273                 PRINTK("%s: smc911x_reset timeout waiting for reset\n", dev->name);
274                 return;
275         }
276
277         /* make sure EEPROM has finished loading before setting GPIO_CFG */
278         timeout=1000;
279         while ( timeout-- && (SMC_GET_E2P_CMD() & E2P_CMD_EPC_BUSY_)) {
280                 udelay(10);
281         }
282         if (timeout == 0){
283                 PRINTK("%s: smc911x_reset timeout waiting for EEPROM busy\n", dev->name);
284                 return;
285         }
286
287         /* Initialize interrupts */
288         SMC_SET_INT_EN(0);
289         SMC_ACK_INT(-1);
290
291         /* Reset the FIFO level and flow control settings */
292         SMC_SET_HW_CFG((lp->tx_fifo_kb & 0xF) << 16);
293 //TODO: Figure out what appropriate pause time is
294         SMC_SET_FLOW(FLOW_FCPT_ | FLOW_FCEN_);
295         SMC_SET_AFC_CFG(lp->afc_cfg);
296
297
298         /* Set to LED outputs */
299         SMC_SET_GPIO_CFG(0x70070000);
300
301         /*
302          * Deassert IRQ for 1*10us for edge type interrupts
303          * and drive IRQ pin push-pull
304          */
305         SMC_SET_IRQ_CFG( (1 << 24) | INT_CFG_IRQ_EN_ | INT_CFG_IRQ_TYPE_ );
306
307         /* clear anything saved */
308         if (lp->pending_tx_skb != NULL) {
309                 dev_kfree_skb (lp->pending_tx_skb);
310                 lp->pending_tx_skb = NULL;
311                 dev->stats.tx_errors++;
312                 dev->stats.tx_aborted_errors++;
313         }
314 }
315
316 /*
317  * Enable Interrupts, Receive, and Transmit
318  */
319 static void smc911x_enable(struct net_device *dev)
320 {
321         unsigned long ioaddr = dev->base_addr;
322         struct smc911x_local *lp = netdev_priv(dev);
323         unsigned mask, cfg, cr;
324         unsigned long flags;
325
326         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
327
328         SMC_SET_MAC_ADDR(dev->dev_addr);
329
330         /* Enable TX */
331         cfg = SMC_GET_HW_CFG();
332         cfg &= HW_CFG_TX_FIF_SZ_ | 0xFFF;
333         cfg |= HW_CFG_SF_;
334         SMC_SET_HW_CFG(cfg);
335         SMC_SET_FIFO_TDA(0xFF);
336         /* Update TX stats on every 64 packets received or every 1 sec */
337         SMC_SET_FIFO_TSL(64);
338         SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
339
340         spin_lock_irqsave(&lp->lock, flags);
341         SMC_GET_MAC_CR(cr);
342         cr |= MAC_CR_TXEN_ | MAC_CR_HBDIS_;
343         SMC_SET_MAC_CR(cr);
344         SMC_SET_TX_CFG(TX_CFG_TX_ON_);
345         spin_unlock_irqrestore(&lp->lock, flags);
346
347         /* Add 2 byte padding to start of packets */
348         SMC_SET_RX_CFG((2<<8) & RX_CFG_RXDOFF_);
349
350         /* Turn on receiver and enable RX */
351         if (cr & MAC_CR_RXEN_)
352                 DBG(SMC_DEBUG_RX, "%s: Receiver already enabled\n", dev->name);
353
354         spin_lock_irqsave(&lp->lock, flags);
355         SMC_SET_MAC_CR( cr | MAC_CR_RXEN_ );
356         spin_unlock_irqrestore(&lp->lock, flags);
357
358         /* Interrupt on every received packet */
359         SMC_SET_FIFO_RSA(0x01);
360         SMC_SET_FIFO_RSL(0x00);
361
362         /* now, enable interrupts */
363         mask = INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_ | INT_EN_RSFL_EN_ |
364                 INT_EN_GPT_INT_EN_ | INT_EN_RXDFH_INT_EN_ | INT_EN_RXE_EN_ |
365                 INT_EN_PHY_INT_EN_;
366         if (IS_REV_A(lp->revision))
367                 mask|=INT_EN_RDFL_EN_;
368         else {
369                 mask|=INT_EN_RDFO_EN_;
370         }
371         SMC_ENABLE_INT(mask);
372 }
373
374 /*
375  * this puts the device in an inactive state
376  */
377 static void smc911x_shutdown(struct net_device *dev)
378 {
379         unsigned long ioaddr = dev->base_addr;
380         struct smc911x_local *lp = netdev_priv(dev);
381         unsigned cr;
382         unsigned long flags;
383
384         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", CARDNAME, __FUNCTION__);
385
386         /* Disable IRQ's */
387         SMC_SET_INT_EN(0);
388
389         /* Turn of Rx and TX */
390         spin_lock_irqsave(&lp->lock, flags);
391         SMC_GET_MAC_CR(cr);
392         cr &= ~(MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
393         SMC_SET_MAC_CR(cr);
394         SMC_SET_TX_CFG(TX_CFG_STOP_TX_);
395         spin_unlock_irqrestore(&lp->lock, flags);
396 }
397
398 static inline void smc911x_drop_pkt(struct net_device *dev)
399 {
400         unsigned long ioaddr = dev->base_addr;
401         unsigned int fifo_count, timeout, reg;
402
403         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, "%s: --> %s\n", CARDNAME, __FUNCTION__);
404         fifo_count = SMC_GET_RX_FIFO_INF() & 0xFFFF;
405         if (fifo_count <= 4) {
406                 /* Manually dump the packet data */
407                 while (fifo_count--)
408                         SMC_GET_RX_FIFO();
409         } else   {
410                 /* Fast forward through the bad packet */
411                 SMC_SET_RX_DP_CTRL(RX_DP_CTRL_FFWD_BUSY_);
412                 timeout=50;
413                 do {
414                         udelay(10);
415                         reg = SMC_GET_RX_DP_CTRL() & RX_DP_CTRL_FFWD_BUSY_;
416                 } while (--timeout && reg);
417                 if (timeout == 0) {
418                         PRINTK("%s: timeout waiting for RX fast forward\n", dev->name);
419                 }
420         }
421 }
422
423 /*
424  * This is the procedure to handle the receipt of a packet.
425  * It should be called after checking for packet presence in
426  * the RX status FIFO.   It must be called with the spin lock
427  * already held.
428  */
429 static inline void       smc911x_rcv(struct net_device *dev)
430 {
431         unsigned long ioaddr = dev->base_addr;
432         unsigned int pkt_len, status;
433         struct sk_buff *skb;
434         unsigned char *data;
435
436         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, "%s: --> %s\n",
437                 dev->name, __FUNCTION__);
438         status = SMC_GET_RX_STS_FIFO();
439         DBG(SMC_DEBUG_RX, "%s: Rx pkt len %d status 0x%08x \n",
440                 dev->name, (status & 0x3fff0000) >> 16, status & 0xc000ffff);
441         pkt_len = (status & RX_STS_PKT_LEN_) >> 16;
442         if (status & RX_STS_ES_) {
443                 /* Deal with a bad packet */
444                 dev->stats.rx_errors++;
445                 if (status & RX_STS_CRC_ERR_)
446                         dev->stats.rx_crc_errors++;
447                 else {
448                         if (status & RX_STS_LEN_ERR_)
449                                 dev->stats.rx_length_errors++;
450                         if (status & RX_STS_MCAST_)
451                                 dev->stats.multicast++;
452                 }
453                 /* Remove the bad packet data from the RX FIFO */
454                 smc911x_drop_pkt(dev);
455         } else {
456                 /* Receive a valid packet */
457                 /* Alloc a buffer with extra room for DMA alignment */
458                 skb=dev_alloc_skb(pkt_len+32);
459                 if (unlikely(skb == NULL)) {
460                         PRINTK( "%s: Low memory, rcvd packet dropped.\n",
461                                 dev->name);
462                         dev->stats.rx_dropped++;
463                         smc911x_drop_pkt(dev);
464                         return;
465                 }
466                 /* Align IP header to 32 bits
467                  * Note that the device is configured to add a 2
468                  * byte padding to the packet start, so we really
469                  * want to write to the orignal data pointer */
470                 data = skb->data;
471                 skb_reserve(skb, 2);
472                 skb_put(skb,pkt_len-4);
473 #ifdef SMC_USE_DMA
474                 {
475                 struct smc911x_local *lp = netdev_priv(dev);
476                 unsigned int fifo;
477                 /* Lower the FIFO threshold if possible */
478                 fifo = SMC_GET_FIFO_INT();
479                 if (fifo & 0xFF) fifo--;
480                 DBG(SMC_DEBUG_RX, "%s: Setting RX stat FIFO threshold to %d\n",
481                         dev->name, fifo & 0xff);
482                 SMC_SET_FIFO_INT(fifo);
483                 /* Setup RX DMA */
484                 SMC_SET_RX_CFG(RX_CFG_RX_END_ALGN16_ | ((2<<8) & RX_CFG_RXDOFF_));
485                 lp->rxdma_active = 1;
486                 lp->current_rx_skb = skb;
487                 SMC_PULL_DATA(data, (pkt_len+2+15) & ~15);
488                 /* Packet processing deferred to DMA RX interrupt */
489                 }
490 #else
491                 SMC_SET_RX_CFG(RX_CFG_RX_END_ALGN4_ | ((2<<8) & RX_CFG_RXDOFF_));
492                 SMC_PULL_DATA(data, pkt_len+2+3);
493
494                 DBG(SMC_DEBUG_PKTS, "%s: Received packet\n", dev->name);
495                 PRINT_PKT(data, ((pkt_len - 4) <= 64) ? pkt_len - 4 : 64);
496                 dev->last_rx = jiffies;
497                 skb->protocol = eth_type_trans(skb, dev);
498                 netif_rx(skb);
499                 dev->stats.rx_packets++;
500                 dev->stats.rx_bytes += pkt_len-4;
501 #endif
502         }
503 }
504
505 /*
506  * This is called to actually send a packet to the chip.
507  */
508 static void smc911x_hardware_send_pkt(struct net_device *dev)
509 {
510         struct smc911x_local *lp = netdev_priv(dev);
511         unsigned long ioaddr = dev->base_addr;
512         struct sk_buff *skb;
513         unsigned int cmdA, cmdB, len;
514         unsigned char *buf;
515         unsigned long flags;
516
517         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n", dev->name, __FUNCTION__);
518         BUG_ON(lp->pending_tx_skb == NULL);
519
520         skb = lp->pending_tx_skb;
521         lp->pending_tx_skb = NULL;
522
523         /* cmdA {25:24] data alignment [20:16] start offset [10:0] buffer length */
524         /* cmdB {31:16] pkt tag [10:0] length */
525 #ifdef SMC_USE_DMA
526         /* 16 byte buffer alignment mode */
527         buf = (char*)((u32)(skb->data) & ~0xF);
528         len = (skb->len + 0xF + ((u32)skb->data & 0xF)) & ~0xF;
529         cmdA = (1<<24) | (((u32)skb->data & 0xF)<<16) |
530                         TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
531                         skb->len;
532 #else
533         buf = (char*)((u32)skb->data & ~0x3);
534         len = (skb->len + 3 + ((u32)skb->data & 3)) & ~0x3;
535         cmdA = (((u32)skb->data & 0x3) << 16) |
536                         TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
537                         skb->len;
538 #endif
539         /* tag is packet length so we can use this in stats update later */
540         cmdB = (skb->len  << 16) | (skb->len & 0x7FF);
541
542         DBG(SMC_DEBUG_TX, "%s: TX PKT LENGTH 0x%04x (%d) BUF 0x%p CMDA 0x%08x CMDB 0x%08x\n",
543                  dev->name, len, len, buf, cmdA, cmdB);
544         SMC_SET_TX_FIFO(cmdA);
545         SMC_SET_TX_FIFO(cmdB);
546
547         DBG(SMC_DEBUG_PKTS, "%s: Transmitted packet\n", dev->name);
548         PRINT_PKT(buf, len <= 64 ? len : 64);
549
550         /* Send pkt via PIO or DMA */
551 #ifdef SMC_USE_DMA
552         lp->current_tx_skb = skb;
553         SMC_PUSH_DATA(buf, len);
554         /* DMA complete IRQ will free buffer and set jiffies */
555 #else
556         SMC_PUSH_DATA(buf, len);
557         dev->trans_start = jiffies;
558         dev_kfree_skb(skb);
559 #endif
560         spin_lock_irqsave(&lp->lock, flags);
561         if (!lp->tx_throttle) {
562                 netif_wake_queue(dev);
563         }
564         spin_unlock_irqrestore(&lp->lock, flags);
565         SMC_ENABLE_INT(INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_);
566 }
567
568 /*
569  * Since I am not sure if I will have enough room in the chip's ram
570  * to store the packet, I call this routine which either sends it
571  * now, or set the card to generates an interrupt when ready
572  * for the packet.
573  */
574 static int smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
575 {
576         struct smc911x_local *lp = netdev_priv(dev);
577         unsigned long ioaddr = dev->base_addr;
578         unsigned int free;
579         unsigned long flags;
580
581         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n",
582                 dev->name, __FUNCTION__);
583
584         BUG_ON(lp->pending_tx_skb != NULL);
585
586         free = SMC_GET_TX_FIFO_INF() & TX_FIFO_INF_TDFREE_;
587         DBG(SMC_DEBUG_TX, "%s: TX free space %d\n", dev->name, free);
588
589         /* Turn off the flow when running out of space in FIFO */
590         if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
591                 DBG(SMC_DEBUG_TX, "%s: Disabling data flow due to low FIFO space (%d)\n",
592                         dev->name, free);
593                 spin_lock_irqsave(&lp->lock, flags);
594                 /* Reenable when at least 1 packet of size MTU present */
595                 SMC_SET_FIFO_TDA((SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
596                 lp->tx_throttle = 1;
597                 netif_stop_queue(dev);
598                 spin_unlock_irqrestore(&lp->lock, flags);
599         }
600
601         /* Drop packets when we run out of space in TX FIFO
602          * Account for overhead required for:
603          *
604          *        Tx command words                       8 bytes
605          *        Start offset                           15 bytes
606          *        End padding                            15 bytes
607          */
608         if (unlikely(free < (skb->len + 8 + 15 + 15))) {
609                 printk("%s: No Tx free space %d < %d\n",
610                         dev->name, free, skb->len);
611                 lp->pending_tx_skb = NULL;
612                 dev->stats.tx_errors++;
613                 dev->stats.tx_dropped++;
614                 dev_kfree_skb(skb);
615                 return 0;
616         }
617
618 #ifdef SMC_USE_DMA
619         {
620                 /* If the DMA is already running then defer this packet Tx until
621                  * the DMA IRQ starts it
622                  */
623                 spin_lock_irqsave(&lp->lock, flags);
624                 if (lp->txdma_active) {
625                         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: Tx DMA running, deferring packet\n", dev->name);
626                         lp->pending_tx_skb = skb;
627                         netif_stop_queue(dev);
628                         spin_unlock_irqrestore(&lp->lock, flags);
629                         return 0;
630                 } else {
631                         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: Activating Tx DMA\n", dev->name);
632                         lp->txdma_active = 1;
633                 }
634                 spin_unlock_irqrestore(&lp->lock, flags);
635         }
636 #endif
637         lp->pending_tx_skb = skb;
638         smc911x_hardware_send_pkt(dev);
639
640         return 0;
641 }
642
643 /*
644  * This handles a TX status interrupt, which is only called when:
645  * - a TX error occurred, or
646  * - TX of a packet completed.
647  */
648 static void smc911x_tx(struct net_device *dev)
649 {
650         unsigned long ioaddr = dev->base_addr;
651         struct smc911x_local *lp = netdev_priv(dev);
652         unsigned int tx_status;
653
654         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n",
655                 dev->name, __FUNCTION__);
656
657         /* Collect the TX status */
658         while (((SMC_GET_TX_FIFO_INF() & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
659                 DBG(SMC_DEBUG_TX, "%s: Tx stat FIFO used 0x%04x\n",
660                         dev->name,
661                         (SMC_GET_TX_FIFO_INF() & TX_FIFO_INF_TSUSED_) >> 16);
662                 tx_status = SMC_GET_TX_STS_FIFO();
663                 dev->stats.tx_packets++;
664                 dev->stats.tx_bytes+=tx_status>>16;
665                 DBG(SMC_DEBUG_TX, "%s: Tx FIFO tag 0x%04x status 0x%04x\n",
666                         dev->name, (tx_status & 0xffff0000) >> 16,
667                         tx_status & 0x0000ffff);
668                 /* count Tx errors, but ignore lost carrier errors when in
669                  * full-duplex mode */
670                 if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
671                     !(tx_status & 0x00000306))) {
672                         dev->stats.tx_errors++;
673                 }
674                 if (tx_status & TX_STS_MANY_COLL_) {
675                         dev->stats.collisions+=16;
676                         dev->stats.tx_aborted_errors++;
677                 } else {
678                         dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
679                 }
680                 /* carrier error only has meaning for half-duplex communication */
681                 if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
682                     !lp->ctl_rfduplx) {
683                         dev->stats.tx_carrier_errors++;
684                 }
685                 if (tx_status & TX_STS_LATE_COLL_) {
686                         dev->stats.collisions++;
687                         dev->stats.tx_aborted_errors++;
688                 }
689         }
690 }
691
692
693 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
694 /*
695  * Reads a register from the MII Management serial interface
696  */
697
698 static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
699 {
700         unsigned long ioaddr = dev->base_addr;
701         unsigned int phydata;
702
703         SMC_GET_MII(phyreg, phyaddr, phydata);
704
705         DBG(SMC_DEBUG_MISC, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
706                 __FUNCTION__, phyaddr, phyreg, phydata);
707         return phydata;
708 }
709
710
711 /*
712  * Writes a register to the MII Management serial interface
713  */
714 static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
715                         int phydata)
716 {
717         unsigned long ioaddr = dev->base_addr;
718
719         DBG(SMC_DEBUG_MISC, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
720                 __FUNCTION__, phyaddr, phyreg, phydata);
721
722         SMC_SET_MII(phyreg, phyaddr, phydata);
723 }
724
725 /*
726  * Finds and reports the PHY address (115 and 117 have external
727  * PHY interface 118 has internal only
728  */
729 static void smc911x_phy_detect(struct net_device *dev)
730 {
731         unsigned long ioaddr = dev->base_addr;
732         struct smc911x_local *lp = netdev_priv(dev);
733         int phyaddr;
734         unsigned int cfg, id1, id2;
735
736         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
737
738         lp->phy_type = 0;
739
740         /*
741          * Scan all 32 PHY addresses if necessary, starting at
742          * PHY#1 to PHY#31, and then PHY#0 last.
743          */
744         switch(lp->version) {
745                 case 0x115:
746                 case 0x117:
747                         cfg = SMC_GET_HW_CFG();
748                         if (cfg & HW_CFG_EXT_PHY_DET_) {
749                                 cfg &= ~HW_CFG_PHY_CLK_SEL_;
750                                 cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
751                                 SMC_SET_HW_CFG(cfg);
752                                 udelay(10); /* Wait for clocks to stop */
753
754                                 cfg |= HW_CFG_EXT_PHY_EN_;
755                                 SMC_SET_HW_CFG(cfg);
756                                 udelay(10); /* Wait for clocks to stop */
757
758                                 cfg &= ~HW_CFG_PHY_CLK_SEL_;
759                                 cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
760                                 SMC_SET_HW_CFG(cfg);
761                                 udelay(10); /* Wait for clocks to stop */
762
763                                 cfg |= HW_CFG_SMI_SEL_;
764                                 SMC_SET_HW_CFG(cfg);
765
766                                 for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
767
768                                         /* Read the PHY identifiers */
769                                         SMC_GET_PHY_ID1(phyaddr & 31, id1);
770                                         SMC_GET_PHY_ID2(phyaddr & 31, id2);
771
772                                         /* Make sure it is a valid identifier */
773                                         if (id1 != 0x0000 && id1 != 0xffff &&
774                                             id1 != 0x8000 && id2 != 0x0000 &&
775                                             id2 != 0xffff && id2 != 0x8000) {
776                                                 /* Save the PHY's address */
777                                                 lp->mii.phy_id = phyaddr & 31;
778                                                 lp->phy_type = id1 << 16 | id2;
779                                                 break;
780                                         }
781                                 }
782                         }
783                 default:
784                         /* Internal media only */
785                         SMC_GET_PHY_ID1(1, id1);
786                         SMC_GET_PHY_ID2(1, id2);
787                         /* Save the PHY's address */
788                         lp->mii.phy_id = 1;
789                         lp->phy_type = id1 << 16 | id2;
790         }
791
792         DBG(SMC_DEBUG_MISC, "%s: phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%d\n",
793                 dev->name, id1, id2, lp->mii.phy_id);
794 }
795
796 /*
797  * Sets the PHY to a configuration as determined by the user.
798  * Called with spin_lock held.
799  */
800 static int smc911x_phy_fixed(struct net_device *dev)
801 {
802         struct smc911x_local *lp = netdev_priv(dev);
803         unsigned long ioaddr = dev->base_addr;
804         int phyaddr = lp->mii.phy_id;
805         int bmcr;
806
807         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
808
809         /* Enter Link Disable state */
810         SMC_GET_PHY_BMCR(phyaddr, bmcr);
811         bmcr |= BMCR_PDOWN;
812         SMC_SET_PHY_BMCR(phyaddr, bmcr);
813
814         /*
815          * Set our fixed capabilities
816          * Disable auto-negotiation
817          */
818         bmcr &= ~BMCR_ANENABLE;
819         if (lp->ctl_rfduplx)
820                 bmcr |= BMCR_FULLDPLX;
821
822         if (lp->ctl_rspeed == 100)
823                 bmcr |= BMCR_SPEED100;
824
825         /* Write our capabilities to the phy control register */
826         SMC_SET_PHY_BMCR(phyaddr, bmcr);
827
828         /* Re-Configure the Receive/Phy Control register */
829         bmcr &= ~BMCR_PDOWN;
830         SMC_SET_PHY_BMCR(phyaddr, bmcr);
831
832         return 1;
833 }
834
835 /*
836  * smc911x_phy_reset - reset the phy
837  * @dev: net device
838  * @phy: phy address
839  *
840  * Issue a software reset for the specified PHY and
841  * wait up to 100ms for the reset to complete.   We should
842  * not access the PHY for 50ms after issuing the reset.
843  *
844  * The time to wait appears to be dependent on the PHY.
845  *
846  */
847 static int smc911x_phy_reset(struct net_device *dev, int phy)
848 {
849         struct smc911x_local *lp = netdev_priv(dev);
850         unsigned long ioaddr = dev->base_addr;
851         int timeout;
852         unsigned long flags;
853         unsigned int reg;
854
855         DBG(SMC_DEBUG_FUNC, "%s: --> %s()\n", dev->name, __FUNCTION__);
856
857         spin_lock_irqsave(&lp->lock, flags);
858         reg = SMC_GET_PMT_CTRL();
859         reg &= ~0xfffff030;
860         reg |= PMT_CTRL_PHY_RST_;
861         SMC_SET_PMT_CTRL(reg);
862         spin_unlock_irqrestore(&lp->lock, flags);
863         for (timeout = 2; timeout; timeout--) {
864                 msleep(50);
865                 spin_lock_irqsave(&lp->lock, flags);
866                 reg = SMC_GET_PMT_CTRL();
867                 spin_unlock_irqrestore(&lp->lock, flags);
868                 if (!(reg & PMT_CTRL_PHY_RST_)) {
869                         /* extra delay required because the phy may
870                          * not be completed with its reset
871                          * when PHY_BCR_RESET_ is cleared. 256us
872                          * should suffice, but use 500us to be safe
873                          */
874                         udelay(500);
875                 break;
876                 }
877         }
878
879         return reg & PMT_CTRL_PHY_RST_;
880 }
881
882 /*
883  * smc911x_phy_powerdown - powerdown phy
884  * @dev: net device
885  * @phy: phy address
886  *
887  * Power down the specified PHY
888  */
889 static void smc911x_phy_powerdown(struct net_device *dev, int phy)
890 {
891         unsigned long ioaddr = dev->base_addr;
892         unsigned int bmcr;
893
894         /* Enter Link Disable state */
895         SMC_GET_PHY_BMCR(phy, bmcr);
896         bmcr |= BMCR_PDOWN;
897         SMC_SET_PHY_BMCR(phy, bmcr);
898 }
899
900 /*
901  * smc911x_phy_check_media - check the media status and adjust BMCR
902  * @dev: net device
903  * @init: set true for initialisation
904  *
905  * Select duplex mode depending on negotiation state.   This
906  * also updates our carrier state.
907  */
908 static void smc911x_phy_check_media(struct net_device *dev, int init)
909 {
910         struct smc911x_local *lp = netdev_priv(dev);
911         unsigned long ioaddr = dev->base_addr;
912         int phyaddr = lp->mii.phy_id;
913         unsigned int bmcr, cr;
914
915         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
916
917         if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
918                 /* duplex state has changed */
919                 SMC_GET_PHY_BMCR(phyaddr, bmcr);
920                 SMC_GET_MAC_CR(cr);
921                 if (lp->mii.full_duplex) {
922                         DBG(SMC_DEBUG_MISC, "%s: Configuring for full-duplex mode\n", dev->name);
923                         bmcr |= BMCR_FULLDPLX;
924                         cr |= MAC_CR_RCVOWN_;
925                 } else {
926                         DBG(SMC_DEBUG_MISC, "%s: Configuring for half-duplex mode\n", dev->name);
927                         bmcr &= ~BMCR_FULLDPLX;
928                         cr &= ~MAC_CR_RCVOWN_;
929                 }
930                 SMC_SET_PHY_BMCR(phyaddr, bmcr);
931                 SMC_SET_MAC_CR(cr);
932         }
933 }
934
935 /*
936  * Configures the specified PHY through the MII management interface
937  * using Autonegotiation.
938  * Calls smc911x_phy_fixed() if the user has requested a certain config.
939  * If RPC ANEG bit is set, the media selection is dependent purely on
940  * the selection by the MII (either in the MII BMCR reg or the result
941  * of autonegotiation.)  If the RPC ANEG bit is cleared, the selection
942  * is controlled by the RPC SPEED and RPC DPLX bits.
943  */
944 static void smc911x_phy_configure(struct work_struct *work)
945 {
946         struct smc911x_local *lp = container_of(work, struct smc911x_local,
947                                                 phy_configure);
948         struct net_device *dev = lp->netdev;
949         unsigned long ioaddr = dev->base_addr;
950         int phyaddr = lp->mii.phy_id;
951         int my_phy_caps; /* My PHY capabilities */
952         int my_ad_caps; /* My Advertised capabilities */
953         int status;
954         unsigned long flags;
955
956         DBG(SMC_DEBUG_FUNC, "%s: --> %s()\n", dev->name, __FUNCTION__);
957
958         /*
959          * We should not be called if phy_type is zero.
960          */
961         if (lp->phy_type == 0)
962                 return;
963
964         if (smc911x_phy_reset(dev, phyaddr)) {
965                 printk("%s: PHY reset timed out\n", dev->name);
966                 return;
967         }
968         spin_lock_irqsave(&lp->lock, flags);
969
970         /*
971          * Enable PHY Interrupts (for register 18)
972          * Interrupts listed here are enabled
973          */
974         SMC_SET_PHY_INT_MASK(phyaddr, PHY_INT_MASK_ENERGY_ON_ |
975                  PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
976                  PHY_INT_MASK_LINK_DOWN_);
977
978         /* If the user requested no auto neg, then go set his request */
979         if (lp->mii.force_media) {
980                 smc911x_phy_fixed(dev);
981                 goto smc911x_phy_configure_exit;
982         }
983
984         /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
985         SMC_GET_PHY_BMSR(phyaddr, my_phy_caps);
986         if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
987                 printk(KERN_INFO "Auto negotiation NOT supported\n");
988                 smc911x_phy_fixed(dev);
989                 goto smc911x_phy_configure_exit;
990         }
991
992         /* CSMA capable w/ both pauses */
993         my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
994
995         if (my_phy_caps & BMSR_100BASE4)
996                 my_ad_caps |= ADVERTISE_100BASE4;
997         if (my_phy_caps & BMSR_100FULL)
998                 my_ad_caps |= ADVERTISE_100FULL;
999         if (my_phy_caps & BMSR_100HALF)
1000                 my_ad_caps |= ADVERTISE_100HALF;
1001         if (my_phy_caps & BMSR_10FULL)
1002                 my_ad_caps |= ADVERTISE_10FULL;
1003         if (my_phy_caps & BMSR_10HALF)
1004                 my_ad_caps |= ADVERTISE_10HALF;
1005
1006         /* Disable capabilities not selected by our user */
1007         if (lp->ctl_rspeed != 100)
1008                 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
1009
1010          if (!lp->ctl_rfduplx)
1011                 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
1012
1013         /* Update our Auto-Neg Advertisement Register */
1014         SMC_SET_PHY_MII_ADV(phyaddr, my_ad_caps);
1015         lp->mii.advertising = my_ad_caps;
1016
1017         /*
1018          * Read the register back.       Without this, it appears that when
1019          * auto-negotiation is restarted, sometimes it isn't ready and
1020          * the link does not come up.
1021          */
1022         udelay(10);
1023         SMC_GET_PHY_MII_ADV(phyaddr, status);
1024
1025         DBG(SMC_DEBUG_MISC, "%s: phy caps=0x%04x\n", dev->name, my_phy_caps);
1026         DBG(SMC_DEBUG_MISC, "%s: phy advertised caps=0x%04x\n", dev->name, my_ad_caps);
1027
1028         /* Restart auto-negotiation process in order to advertise my caps */
1029         SMC_SET_PHY_BMCR(phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
1030
1031         smc911x_phy_check_media(dev, 1);
1032
1033 smc911x_phy_configure_exit:
1034         spin_unlock_irqrestore(&lp->lock, flags);
1035 }
1036
1037 /*
1038  * smc911x_phy_interrupt
1039  *
1040  * Purpose:  Handle interrupts relating to PHY register 18. This is
1041  *       called from the "hard" interrupt handler under our private spinlock.
1042  */
1043 static void smc911x_phy_interrupt(struct net_device *dev)
1044 {
1045         struct smc911x_local *lp = netdev_priv(dev);
1046         unsigned long ioaddr = dev->base_addr;
1047         int phyaddr = lp->mii.phy_id;
1048         int status;
1049
1050         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1051
1052         if (lp->phy_type == 0)
1053                 return;
1054
1055         smc911x_phy_check_media(dev, 0);
1056         /* read to clear status bits */
1057         SMC_GET_PHY_INT_SRC(phyaddr,status);
1058         DBG(SMC_DEBUG_MISC, "%s: PHY interrupt status 0x%04x\n",
1059                 dev->name, status & 0xffff);
1060         DBG(SMC_DEBUG_MISC, "%s: AFC_CFG 0x%08x\n",
1061                 dev->name, SMC_GET_AFC_CFG());
1062 }
1063
1064 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1065
1066 /*
1067  * This is the main routine of the driver, to handle the device when
1068  * it needs some attention.
1069  */
1070 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1071 {
1072         struct net_device *dev = dev_id;
1073         unsigned long ioaddr = dev->base_addr;
1074         struct smc911x_local *lp = netdev_priv(dev);
1075         unsigned int status, mask, timeout;
1076         unsigned int rx_overrun=0, cr, pkts;
1077         unsigned long flags;
1078
1079         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1080
1081         spin_lock_irqsave(&lp->lock, flags);
1082
1083         /* Spurious interrupt check */
1084         if ((SMC_GET_IRQ_CFG() & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1085                 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1086                 spin_unlock_irqrestore(&lp->lock, flags);
1087                 return IRQ_NONE;
1088         }
1089
1090         mask = SMC_GET_INT_EN();
1091         SMC_SET_INT_EN(0);
1092
1093         /* set a timeout value, so I don't stay here forever */
1094         timeout = 8;
1095
1096
1097         do {
1098                 status = SMC_GET_INT();
1099
1100                 DBG(SMC_DEBUG_MISC, "%s: INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1101                         dev->name, status, mask, status & ~mask);
1102
1103                 status &= mask;
1104                 if (!status)
1105                         break;
1106
1107                 /* Handle SW interrupt condition */
1108                 if (status & INT_STS_SW_INT_) {
1109                         SMC_ACK_INT(INT_STS_SW_INT_);
1110                         mask &= ~INT_EN_SW_INT_EN_;
1111                 }
1112                 /* Handle various error conditions */
1113                 if (status & INT_STS_RXE_) {
1114                         SMC_ACK_INT(INT_STS_RXE_);
1115                         dev->stats.rx_errors++;
1116                 }
1117                 if (status & INT_STS_RXDFH_INT_) {
1118                         SMC_ACK_INT(INT_STS_RXDFH_INT_);
1119                         dev->stats.rx_dropped+=SMC_GET_RX_DROP();
1120                  }
1121                 /* Undocumented interrupt-what is the right thing to do here? */
1122                 if (status & INT_STS_RXDF_INT_) {
1123                         SMC_ACK_INT(INT_STS_RXDF_INT_);
1124                 }
1125
1126                 /* Rx Data FIFO exceeds set level */
1127                 if (status & INT_STS_RDFL_) {
1128                         if (IS_REV_A(lp->revision)) {
1129                                 rx_overrun=1;
1130                                 SMC_GET_MAC_CR(cr);
1131                                 cr &= ~MAC_CR_RXEN_;
1132                                 SMC_SET_MAC_CR(cr);
1133                                 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1134                                 dev->stats.rx_errors++;
1135                                 dev->stats.rx_fifo_errors++;
1136                         }
1137                         SMC_ACK_INT(INT_STS_RDFL_);
1138                 }
1139                 if (status & INT_STS_RDFO_) {
1140                         if (!IS_REV_A(lp->revision)) {
1141                                 SMC_GET_MAC_CR(cr);
1142                                 cr &= ~MAC_CR_RXEN_;
1143                                 SMC_SET_MAC_CR(cr);
1144                                 rx_overrun=1;
1145                                 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1146                                 dev->stats.rx_errors++;
1147                                 dev->stats.rx_fifo_errors++;
1148                         }
1149                         SMC_ACK_INT(INT_STS_RDFO_);
1150                 }
1151                 /* Handle receive condition */
1152                 if ((status & INT_STS_RSFL_) || rx_overrun) {
1153                         unsigned int fifo;
1154                         DBG(SMC_DEBUG_RX, "%s: RX irq\n", dev->name);
1155                         fifo = SMC_GET_RX_FIFO_INF();
1156                         pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1157                         DBG(SMC_DEBUG_RX, "%s: Rx FIFO pkts %d, bytes %d\n",
1158                                 dev->name, pkts, fifo & 0xFFFF );
1159                         if (pkts != 0) {
1160 #ifdef SMC_USE_DMA
1161                                 unsigned int fifo;
1162                                 if (lp->rxdma_active){
1163                                         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1164                                                 "%s: RX DMA active\n", dev->name);
1165                                         /* The DMA is already running so up the IRQ threshold */
1166                                         fifo = SMC_GET_FIFO_INT() & ~0xFF;
1167                                         fifo |= pkts & 0xFF;
1168                                         DBG(SMC_DEBUG_RX,
1169                                                 "%s: Setting RX stat FIFO threshold to %d\n",
1170                                                 dev->name, fifo & 0xff);
1171                                         SMC_SET_FIFO_INT(fifo);
1172                                 } else
1173 #endif
1174                                 smc911x_rcv(dev);
1175                         }
1176                         SMC_ACK_INT(INT_STS_RSFL_);
1177                 }
1178                 /* Handle transmit FIFO available */
1179                 if (status & INT_STS_TDFA_) {
1180                         DBG(SMC_DEBUG_TX, "%s: TX data FIFO space available irq\n", dev->name);
1181                         SMC_SET_FIFO_TDA(0xFF);
1182                         lp->tx_throttle = 0;
1183 #ifdef SMC_USE_DMA
1184                         if (!lp->txdma_active)
1185 #endif
1186                                 netif_wake_queue(dev);
1187                         SMC_ACK_INT(INT_STS_TDFA_);
1188                 }
1189                 /* Handle transmit done condition */
1190 #if 1
1191                 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1192                         DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC,
1193                                 "%s: Tx stat FIFO limit (%d) /GPT irq\n",
1194                                 dev->name, (SMC_GET_FIFO_INT() & 0x00ff0000) >> 16);
1195                         smc911x_tx(dev);
1196                         SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
1197                         SMC_ACK_INT(INT_STS_TSFL_);
1198                         SMC_ACK_INT(INT_STS_TSFL_ | INT_STS_GPT_INT_);
1199                 }
1200 #else
1201                 if (status & INT_STS_TSFL_) {
1202                         DBG(SMC_DEBUG_TX, "%s: TX status FIFO limit (%d) irq \n", dev->name, );
1203                         smc911x_tx(dev);
1204                         SMC_ACK_INT(INT_STS_TSFL_);
1205                 }
1206
1207                 if (status & INT_STS_GPT_INT_) {
1208                         DBG(SMC_DEBUG_RX, "%s: IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1209                                 dev->name,
1210                                 SMC_GET_IRQ_CFG(),
1211                                 SMC_GET_FIFO_INT(),
1212                                 SMC_GET_RX_CFG());
1213                         DBG(SMC_DEBUG_RX, "%s: Rx Stat FIFO Used 0x%02x "
1214                                 "Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1215                                 dev->name,
1216                                 (SMC_GET_RX_FIFO_INF() & 0x00ff0000) >> 16,
1217                                 SMC_GET_RX_FIFO_INF() & 0xffff,
1218                                 SMC_GET_RX_STS_FIFO_PEEK());
1219                         SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
1220                         SMC_ACK_INT(INT_STS_GPT_INT_);
1221                 }
1222 #endif
1223
1224                 /* Handle PHY interrupt condition */
1225                 if (status & INT_STS_PHY_INT_) {
1226                         DBG(SMC_DEBUG_MISC, "%s: PHY irq\n", dev->name);
1227                         smc911x_phy_interrupt(dev);
1228                         SMC_ACK_INT(INT_STS_PHY_INT_);
1229                 }
1230         } while (--timeout);
1231
1232         /* restore mask state */
1233         SMC_SET_INT_EN(mask);
1234
1235         DBG(SMC_DEBUG_MISC, "%s: Interrupt done (%d loops)\n",
1236                 dev->name, 8-timeout);
1237
1238         spin_unlock_irqrestore(&lp->lock, flags);
1239
1240         DBG(3, "%s: Interrupt done (%d loops)\n", dev->name, 8-timeout);
1241
1242         return IRQ_HANDLED;
1243 }
1244
1245 #ifdef SMC_USE_DMA
1246 static void
1247 smc911x_tx_dma_irq(int dma, void *data)
1248 {
1249         struct net_device *dev = (struct net_device *)data;
1250         struct smc911x_local *lp = netdev_priv(dev);
1251         struct sk_buff *skb = lp->current_tx_skb;
1252         unsigned long flags;
1253
1254         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1255
1256         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: TX DMA irq handler\n", dev->name);
1257         /* Clear the DMA interrupt sources */
1258         SMC_DMA_ACK_IRQ(dev, dma);
1259         BUG_ON(skb == NULL);
1260         dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1261         dev->trans_start = jiffies;
1262         dev_kfree_skb_irq(skb);
1263         lp->current_tx_skb = NULL;
1264         if (lp->pending_tx_skb != NULL)
1265                 smc911x_hardware_send_pkt(dev);
1266         else {
1267                 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1268                         "%s: No pending Tx packets. DMA disabled\n", dev->name);
1269                 spin_lock_irqsave(&lp->lock, flags);
1270                 lp->txdma_active = 0;
1271                 if (!lp->tx_throttle) {
1272                         netif_wake_queue(dev);
1273                 }
1274                 spin_unlock_irqrestore(&lp->lock, flags);
1275         }
1276
1277         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1278                 "%s: TX DMA irq completed\n", dev->name);
1279 }
1280 static void
1281 smc911x_rx_dma_irq(int dma, void *data)
1282 {
1283         struct net_device *dev = (struct net_device *)data;
1284         unsigned long ioaddr = dev->base_addr;
1285         struct smc911x_local *lp = netdev_priv(dev);
1286         struct sk_buff *skb = lp->current_rx_skb;
1287         unsigned long flags;
1288         unsigned int pkts;
1289
1290         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1291         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, "%s: RX DMA irq handler\n", dev->name);
1292         /* Clear the DMA interrupt sources */
1293         SMC_DMA_ACK_IRQ(dev, dma);
1294         dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1295         BUG_ON(skb == NULL);
1296         lp->current_rx_skb = NULL;
1297         PRINT_PKT(skb->data, skb->len);
1298         dev->last_rx = jiffies;
1299         skb->protocol = eth_type_trans(skb, dev);
1300         dev->stats.rx_packets++;
1301         dev->stats.rx_bytes += skb->len;
1302         netif_rx(skb);
1303
1304         spin_lock_irqsave(&lp->lock, flags);
1305         pkts = (SMC_GET_RX_FIFO_INF() & RX_FIFO_INF_RXSUSED_) >> 16;
1306         if (pkts != 0) {
1307                 smc911x_rcv(dev);
1308         }else {
1309                 lp->rxdma_active = 0;
1310         }
1311         spin_unlock_irqrestore(&lp->lock, flags);
1312         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1313                 "%s: RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1314                 dev->name, pkts);
1315 }
1316 #endif   /* SMC_USE_DMA */
1317
1318 #ifdef CONFIG_NET_POLL_CONTROLLER
1319 /*
1320  * Polling receive - used by netconsole and other diagnostic tools
1321  * to allow network i/o with interrupts disabled.
1322  */
1323 static void smc911x_poll_controller(struct net_device *dev)
1324 {
1325         disable_irq(dev->irq);
1326         smc911x_interrupt(dev->irq, dev);
1327         enable_irq(dev->irq);
1328 }
1329 #endif
1330
1331 /* Our watchdog timed out. Called by the networking layer */
1332 static void smc911x_timeout(struct net_device *dev)
1333 {
1334         struct smc911x_local *lp = netdev_priv(dev);
1335         unsigned long ioaddr = dev->base_addr;
1336         int status, mask;
1337         unsigned long flags;
1338
1339         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1340
1341         spin_lock_irqsave(&lp->lock, flags);
1342         status = SMC_GET_INT();
1343         mask = SMC_GET_INT_EN();
1344         spin_unlock_irqrestore(&lp->lock, flags);
1345         DBG(SMC_DEBUG_MISC, "%s: INT 0x%02x MASK 0x%02x \n",
1346                 dev->name, status, mask);
1347
1348         /* Dump the current TX FIFO contents and restart */
1349         mask = SMC_GET_TX_CFG();
1350         SMC_SET_TX_CFG(mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1351         /*
1352          * Reconfiguring the PHY doesn't seem like a bad idea here, but
1353          * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1354          * which calls schedule().       Hence we use a work queue.
1355          */
1356         if (lp->phy_type != 0)
1357                 schedule_work(&lp->phy_configure);
1358
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  */
1370 static void smc911x_set_multicast_list(struct net_device *dev)
1371 {
1372         struct smc911x_local *lp = netdev_priv(dev);
1373         unsigned long ioaddr = dev->base_addr;
1374         unsigned int multicast_table[2];
1375         unsigned int mcr, update_multicast = 0;
1376         unsigned long flags;
1377
1378         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1379
1380         spin_lock_irqsave(&lp->lock, flags);
1381         SMC_GET_MAC_CR(mcr);
1382         spin_unlock_irqrestore(&lp->lock, flags);
1383
1384         if (dev->flags & IFF_PROMISC) {
1385
1386                 DBG(SMC_DEBUG_MISC, "%s: RCR_PRMS\n", dev->name);
1387                 mcr |= MAC_CR_PRMS_;
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(SMC_DEBUG_MISC, "%s: RCR_ALMUL\n", dev->name);
1396                 mcr |= MAC_CR_MCPAS_;
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 1 bit is
1408          * the number of the 32 bit register, while the low 5 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                 /* Set the Hash perfec mode */
1416                 mcr |= MAC_CR_HPFILT_;
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                         u32 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                         /* upper 6 bits are used as hash index */
1434                         position = ether_crc(ETH_ALEN, cur_addr->dmi_addr)>>26;
1435
1436                         multicast_table[position>>5] |= 1 << (position&0x1f);
1437                 }
1438
1439                 /* be sure I get rid of flags I might have set */
1440                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1441
1442                 /* now, the table can be loaded into the chipset */
1443                 update_multicast = 1;
1444         } else   {
1445                 DBG(SMC_DEBUG_MISC, "%s: ~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n",
1446                         dev->name);
1447                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1448
1449                 /*
1450                  * since I'm disabling all multicast entirely, I need to
1451                  * clear the multicast list
1452                  */
1453                 memset(multicast_table, 0, sizeof(multicast_table));
1454                 update_multicast = 1;
1455         }
1456
1457         spin_lock_irqsave(&lp->lock, flags);
1458         SMC_SET_MAC_CR(mcr);
1459         if (update_multicast) {
1460                 DBG(SMC_DEBUG_MISC,
1461                         "%s: update mcast hash table 0x%08x 0x%08x\n",
1462                         dev->name, multicast_table[0], multicast_table[1]);
1463                 SMC_SET_HASHL(multicast_table[0]);
1464                 SMC_SET_HASHH(multicast_table[1]);
1465         }
1466         spin_unlock_irqrestore(&lp->lock, flags);
1467 }
1468
1469
1470 /*
1471  * Open and Initialize the board
1472  *
1473  * Set up everything, reset the card, etc..
1474  */
1475 static int
1476 smc911x_open(struct net_device *dev)
1477 {
1478         struct smc911x_local *lp = netdev_priv(dev);
1479
1480         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1481
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)) {
1488                 PRINTK("%s: no valid ethernet hw addr\n", __FUNCTION__);
1489                 return -EINVAL;
1490         }
1491
1492         /* reset the hardware */
1493         smc911x_reset(dev);
1494
1495         /* Configure the PHY, initialize the link state */
1496         smc911x_phy_configure(&lp->phy_configure);
1497
1498         /* Turn on Tx + Rx */
1499         smc911x_enable(dev);
1500
1501         netif_start_queue(dev);
1502
1503         return 0;
1504 }
1505
1506 /*
1507  * smc911x_close
1508  *
1509  * this makes the board clean up everything that it can
1510  * and not talk to the outside world.    Caused by
1511  * an 'ifconfig ethX down'
1512  */
1513 static int smc911x_close(struct net_device *dev)
1514 {
1515         struct smc911x_local *lp = netdev_priv(dev);
1516
1517         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1518
1519         netif_stop_queue(dev);
1520         netif_carrier_off(dev);
1521
1522         /* clear everything */
1523         smc911x_shutdown(dev);
1524
1525         if (lp->phy_type != 0) {
1526                 /* We need to ensure that no calls to
1527                  * smc911x_phy_configure are pending.
1528                  */
1529                 cancel_work_sync(&lp->phy_configure);
1530                 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1531         }
1532
1533         if (lp->pending_tx_skb) {
1534                 dev_kfree_skb(lp->pending_tx_skb);
1535                 lp->pending_tx_skb = NULL;
1536         }
1537
1538         return 0;
1539 }
1540
1541 /*
1542  * Ethtool support
1543  */
1544 static int
1545 smc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1546 {
1547         struct smc911x_local *lp = netdev_priv(dev);
1548         unsigned long ioaddr = dev->base_addr;
1549         int ret, status;
1550         unsigned long flags;
1551
1552         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1553         cmd->maxtxpkt = 1;
1554         cmd->maxrxpkt = 1;
1555
1556         if (lp->phy_type != 0) {
1557                 spin_lock_irqsave(&lp->lock, flags);
1558                 ret = mii_ethtool_gset(&lp->mii, cmd);
1559                 spin_unlock_irqrestore(&lp->lock, flags);
1560         } else {
1561                 cmd->supported = SUPPORTED_10baseT_Half |
1562                                 SUPPORTED_10baseT_Full |
1563                                 SUPPORTED_TP | SUPPORTED_AUI;
1564
1565                 if (lp->ctl_rspeed == 10)
1566                         cmd->speed = SPEED_10;
1567                 else if (lp->ctl_rspeed == 100)
1568                         cmd->speed = SPEED_100;
1569
1570                 cmd->autoneg = AUTONEG_DISABLE;
1571                 if (lp->mii.phy_id==1)
1572                         cmd->transceiver = XCVR_INTERNAL;
1573                 else
1574                         cmd->transceiver = XCVR_EXTERNAL;
1575                 cmd->port = 0;
1576                 SMC_GET_PHY_SPECIAL(lp->mii.phy_id, status);
1577                 cmd->duplex =
1578                         (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1579                                 DUPLEX_FULL : DUPLEX_HALF;
1580                 ret = 0;
1581         }
1582
1583         return ret;
1584 }
1585
1586 static int
1587 smc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1588 {
1589         struct smc911x_local *lp = netdev_priv(dev);
1590         int ret;
1591         unsigned long flags;
1592
1593         if (lp->phy_type != 0) {
1594                 spin_lock_irqsave(&lp->lock, flags);
1595                 ret = mii_ethtool_sset(&lp->mii, cmd);
1596                 spin_unlock_irqrestore(&lp->lock, flags);
1597         } else {
1598                 if (cmd->autoneg != AUTONEG_DISABLE ||
1599                         cmd->speed != SPEED_10 ||
1600                         (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1601                         (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1602                         return -EINVAL;
1603
1604                 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1605
1606                 ret = 0;
1607         }
1608
1609         return ret;
1610 }
1611
1612 static void
1613 smc911x_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));
1617         strncpy(info->bus_info, dev->dev.parent->bus_id, sizeof(info->bus_info));
1618 }
1619
1620 static int smc911x_ethtool_nwayreset(struct net_device *dev)
1621 {
1622         struct smc911x_local *lp = netdev_priv(dev);
1623         int ret = -EINVAL;
1624         unsigned long flags;
1625
1626         if (lp->phy_type != 0) {
1627                 spin_lock_irqsave(&lp->lock, flags);
1628                 ret = mii_nway_restart(&lp->mii);
1629                 spin_unlock_irqrestore(&lp->lock, flags);
1630         }
1631
1632         return ret;
1633 }
1634
1635 static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1636 {
1637         struct smc911x_local *lp = netdev_priv(dev);
1638         return lp->msg_enable;
1639 }
1640
1641 static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1642 {
1643         struct smc911x_local *lp = netdev_priv(dev);
1644         lp->msg_enable = level;
1645 }
1646
1647 static int smc911x_ethtool_getregslen(struct net_device *dev)
1648 {
1649         /* System regs + MAC regs + PHY regs */
1650         return (((E2P_CMD - ID_REV)/4 + 1) +
1651                         (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1652 }
1653
1654 static void smc911x_ethtool_getregs(struct net_device *dev,
1655                                                                                  struct ethtool_regs* regs, void *buf)
1656 {
1657         unsigned long ioaddr = dev->base_addr;
1658         struct smc911x_local *lp = netdev_priv(dev);
1659         unsigned long flags;
1660         u32 reg,i,j=0;
1661         u32 *data = (u32*)buf;
1662
1663         regs->version = lp->version;
1664         for(i=ID_REV;i<=E2P_CMD;i+=4) {
1665                 data[j++] = SMC_inl(ioaddr,i);
1666         }
1667         for(i=MAC_CR;i<=WUCSR;i++) {
1668                 spin_lock_irqsave(&lp->lock, flags);
1669                 SMC_GET_MAC_CSR(i, reg);
1670                 spin_unlock_irqrestore(&lp->lock, flags);
1671                 data[j++] = reg;
1672         }
1673         for(i=0;i<=31;i++) {
1674                 spin_lock_irqsave(&lp->lock, flags);
1675                 SMC_GET_MII(i, lp->mii.phy_id, reg);
1676                 spin_unlock_irqrestore(&lp->lock, flags);
1677                 data[j++] = reg & 0xFFFF;
1678         }
1679 }
1680
1681 static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1682 {
1683         unsigned long ioaddr = dev->base_addr;
1684         unsigned int timeout;
1685         int e2p_cmd;
1686
1687         e2p_cmd = SMC_GET_E2P_CMD();
1688         for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1689                 if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1690                         PRINTK("%s: %s timeout waiting for EEPROM to respond\n",
1691                                 dev->name, __FUNCTION__);
1692                         return -EFAULT;
1693                 }
1694                 mdelay(1);
1695                 e2p_cmd = SMC_GET_E2P_CMD();
1696         }
1697         if (timeout == 0) {
1698                 PRINTK("%s: %s timeout waiting for EEPROM CMD not busy\n",
1699                         dev->name, __FUNCTION__);
1700                 return -ETIMEDOUT;
1701         }
1702         return 0;
1703 }
1704
1705 static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1706                                                                                                         int cmd, int addr)
1707 {
1708         unsigned long ioaddr = dev->base_addr;
1709         int ret;
1710
1711         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1712                 return ret;
1713         SMC_SET_E2P_CMD(E2P_CMD_EPC_BUSY_ |
1714                 ((cmd) & (0x7<<28)) |
1715                 ((addr) & 0xFF));
1716         return 0;
1717 }
1718
1719 static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1720                                                                                                         u8 *data)
1721 {
1722         unsigned long ioaddr = dev->base_addr;
1723         int ret;
1724
1725         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1726                 return ret;
1727         *data = SMC_GET_E2P_DATA();
1728         return 0;
1729 }
1730
1731 static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1732                                                                                                          u8 data)
1733 {
1734         unsigned long ioaddr = dev->base_addr;
1735         int ret;
1736
1737         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1738                 return ret;
1739         SMC_SET_E2P_DATA(data);
1740         return 0;
1741 }
1742
1743 static int smc911x_ethtool_geteeprom(struct net_device *dev,
1744                                                                           struct ethtool_eeprom *eeprom, u8 *data)
1745 {
1746         u8 eebuf[SMC911X_EEPROM_LEN];
1747         int i, ret;
1748
1749         for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1750                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1751                         return ret;
1752                 if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1753                         return ret;
1754                 }
1755         memcpy(data, eebuf+eeprom->offset, eeprom->len);
1756         return 0;
1757 }
1758
1759 static int smc911x_ethtool_seteeprom(struct net_device *dev,
1760                                                                            struct ethtool_eeprom *eeprom, u8 *data)
1761 {
1762         int i, ret;
1763
1764         /* Enable erase */
1765         if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1766                 return ret;
1767         for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1768                 /* erase byte */
1769                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1770                         return ret;
1771                 /* write byte */
1772                 if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1773                          return ret;
1774                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1775                         return ret;
1776                 }
1777          return 0;
1778 }
1779
1780 static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1781 {
1782          return SMC911X_EEPROM_LEN;
1783 }
1784
1785 static const struct ethtool_ops smc911x_ethtool_ops = {
1786         .get_settings    = smc911x_ethtool_getsettings,
1787         .set_settings    = smc911x_ethtool_setsettings,
1788         .get_drvinfo     = smc911x_ethtool_getdrvinfo,
1789         .get_msglevel    = smc911x_ethtool_getmsglevel,
1790         .set_msglevel    = smc911x_ethtool_setmsglevel,
1791         .nway_reset = smc911x_ethtool_nwayreset,
1792         .get_link        = ethtool_op_get_link,
1793         .get_regs_len    = smc911x_ethtool_getregslen,
1794         .get_regs        = smc911x_ethtool_getregs,
1795         .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1796         .get_eeprom = smc911x_ethtool_geteeprom,
1797         .set_eeprom = smc911x_ethtool_seteeprom,
1798 };
1799
1800 /*
1801  * smc911x_findirq
1802  *
1803  * This routine has a simple purpose -- make the SMC chip generate an
1804  * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1805  */
1806 static int __init smc911x_findirq(unsigned long ioaddr)
1807 {
1808         int timeout = 20;
1809         unsigned long cookie;
1810
1811         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
1812
1813         cookie = probe_irq_on();
1814
1815         /*
1816          * Force a SW interrupt
1817          */
1818
1819         SMC_SET_INT_EN(INT_EN_SW_INT_EN_);
1820
1821         /*
1822          * Wait until positive that the interrupt has been generated
1823          */
1824         do {
1825                 int int_status;
1826                 udelay(10);
1827                 int_status = SMC_GET_INT_EN();
1828                 if (int_status & INT_EN_SW_INT_EN_)
1829                          break;         /* got the interrupt */
1830         } while (--timeout);
1831
1832         /*
1833          * there is really nothing that I can do here if timeout fails,
1834          * as autoirq_report will return a 0 anyway, which is what I
1835          * want in this case.    Plus, the clean up is needed in both
1836          * cases.
1837          */
1838
1839         /* and disable all interrupts again */
1840         SMC_SET_INT_EN(0);
1841
1842         /* and return what I found */
1843         return probe_irq_off(cookie);
1844 }
1845
1846 /*
1847  * Function: smc911x_probe(unsigned long ioaddr)
1848  *
1849  * Purpose:
1850  *       Tests to see if a given ioaddr points to an SMC911x chip.
1851  *       Returns a 0 on success
1852  *
1853  * Algorithm:
1854  *       (1) see if the endian word is OK
1855  *       (1) see if I recognize the chip ID in the appropriate register
1856  *
1857  * Here I do typical initialization tasks.
1858  *
1859  * o  Initialize the structure if needed
1860  * o  print out my vanity message if not done so already
1861  * o  print out what type of hardware is detected
1862  * o  print out the ethernet address
1863  * o  find the IRQ
1864  * o  set up my private data
1865  * o  configure the dev structure with my subroutines
1866  * o  actually GRAB the irq.
1867  * o  GRAB the region
1868  */
1869 static int __init smc911x_probe(struct net_device *dev, unsigned long ioaddr)
1870 {
1871         struct smc911x_local *lp = netdev_priv(dev);
1872         int i, retval;
1873         unsigned int val, chip_id, revision;
1874         const char *version_string;
1875
1876         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1877
1878         /* First, see if the endian word is recognized */
1879         val = SMC_GET_BYTE_TEST();
1880         DBG(SMC_DEBUG_MISC, "%s: endian probe returned 0x%04x\n", CARDNAME, val);
1881         if (val != 0x87654321) {
1882                 printk(KERN_ERR "Invalid chip endian 0x08%x\n",val);
1883                 retval = -ENODEV;
1884                 goto err_out;
1885         }
1886
1887         /*
1888          * check if the revision register is something that I
1889          * recognize.   These might need to be added to later,
1890          * as future revisions could be added.
1891          */
1892         chip_id = SMC_GET_PN();
1893         DBG(SMC_DEBUG_MISC, "%s: id probe returned 0x%04x\n", CARDNAME, chip_id);
1894         for(i=0;chip_ids[i].id != 0; i++) {
1895                 if (chip_ids[i].id == chip_id) break;
1896         }
1897         if (!chip_ids[i].id) {
1898                 printk(KERN_ERR "Unknown chip ID %04x\n", chip_id);
1899                 retval = -ENODEV;
1900                 goto err_out;
1901         }
1902         version_string = chip_ids[i].name;
1903
1904         revision = SMC_GET_REV();
1905         DBG(SMC_DEBUG_MISC, "%s: revision = 0x%04x\n", CARDNAME, revision);
1906
1907         /* At this point I'll assume that the chip is an SMC911x. */
1908         DBG(SMC_DEBUG_MISC, "%s: Found a %s\n", CARDNAME, chip_ids[i].name);
1909
1910         /* Validate the TX FIFO size requested */
1911         if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1912                 printk(KERN_ERR "Invalid TX FIFO size requested %d\n", tx_fifo_kb);
1913                 retval = -EINVAL;
1914                 goto err_out;
1915         }
1916
1917         /* fill in some of the fields */
1918         dev->base_addr = ioaddr;
1919         lp->version = chip_ids[i].id;
1920         lp->revision = revision;
1921         lp->tx_fifo_kb = tx_fifo_kb;
1922         /* Reverse calculate the RX FIFO size from the TX */
1923         lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1924         lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1925
1926         /* Set the automatic flow control values */
1927         switch(lp->tx_fifo_kb) {
1928                 /*
1929                  *       AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1930                  *       AFC_LO is AFC_HI/2
1931                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1932                  */
1933                 case 2:/* 13440 Rx Data Fifo Size */
1934                         lp->afc_cfg=0x008C46AF;break;
1935                 case 3:/* 12480 Rx Data Fifo Size */
1936                         lp->afc_cfg=0x0082419F;break;
1937                 case 4:/* 11520 Rx Data Fifo Size */
1938                         lp->afc_cfg=0x00783C9F;break;
1939                 case 5:/* 10560 Rx Data Fifo Size */
1940                         lp->afc_cfg=0x006E374F;break;
1941                 case 6:/* 9600 Rx Data Fifo Size */
1942                         lp->afc_cfg=0x0064328F;break;
1943                 case 7:/* 8640 Rx Data Fifo Size */
1944                         lp->afc_cfg=0x005A2D7F;break;
1945                 case 8:/* 7680 Rx Data Fifo Size */
1946                         lp->afc_cfg=0x0050287F;break;
1947                 case 9:/* 6720 Rx Data Fifo Size */
1948                         lp->afc_cfg=0x0046236F;break;
1949                 case 10:/* 5760 Rx Data Fifo Size */
1950                         lp->afc_cfg=0x003C1E6F;break;
1951                 case 11:/* 4800 Rx Data Fifo Size */
1952                         lp->afc_cfg=0x0032195F;break;
1953                 /*
1954                  *       AFC_HI is ~1520 bytes less than RX Data Fifo Size
1955                  *       AFC_LO is AFC_HI/2
1956                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1957                  */
1958                 case 12:/* 3840 Rx Data Fifo Size */
1959                         lp->afc_cfg=0x0024124F;break;
1960                 case 13:/* 2880 Rx Data Fifo Size */
1961                         lp->afc_cfg=0x0015073F;break;
1962                 case 14:/* 1920 Rx Data Fifo Size */
1963                         lp->afc_cfg=0x0006032F;break;
1964                  default:
1965                          PRINTK("%s: ERROR -- no AFC_CFG setting found",
1966                                 dev->name);
1967                          break;
1968         }
1969
1970         DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX,
1971                 "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1972                 lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1973
1974         spin_lock_init(&lp->lock);
1975
1976         /* Get the MAC address */
1977         SMC_GET_MAC_ADDR(dev->dev_addr);
1978
1979         /* now, reset the chip, and put it into a known state */
1980         smc911x_reset(dev);
1981
1982         /*
1983          * If dev->irq is 0, then the device has to be banged on to see
1984          * what the IRQ is.
1985          *
1986          * Specifying an IRQ is done with the assumption that the user knows
1987          * what (s)he is doing.  No checking is done!!!!
1988          */
1989         if (dev->irq < 1) {
1990                 int trials;
1991
1992                 trials = 3;
1993                 while (trials--) {
1994                         dev->irq = smc911x_findirq(ioaddr);
1995                         if (dev->irq)
1996                                 break;
1997                         /* kick the card and try again */
1998                         smc911x_reset(dev);
1999                 }
2000         }
2001         if (dev->irq == 0) {
2002                 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
2003                         dev->name);
2004                 retval = -ENODEV;
2005                 goto err_out;
2006         }
2007         dev->irq = irq_canonicalize(dev->irq);
2008
2009         /* Fill in the fields of the device structure with ethernet values. */
2010         ether_setup(dev);
2011
2012         dev->open = smc911x_open;
2013         dev->stop = smc911x_close;
2014         dev->hard_start_xmit = smc911x_hard_start_xmit;
2015         dev->tx_timeout = smc911x_timeout;
2016         dev->watchdog_timeo = msecs_to_jiffies(watchdog);
2017         dev->set_multicast_list = smc911x_set_multicast_list;
2018         dev->ethtool_ops = &smc911x_ethtool_ops;
2019 #ifdef CONFIG_NET_POLL_CONTROLLER
2020         dev->poll_controller = smc911x_poll_controller;
2021 #endif
2022
2023         INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
2024         lp->mii.phy_id_mask = 0x1f;
2025         lp->mii.reg_num_mask = 0x1f;
2026         lp->mii.force_media = 0;
2027         lp->mii.full_duplex = 0;
2028         lp->mii.dev = dev;
2029         lp->mii.mdio_read = smc911x_phy_read;
2030         lp->mii.mdio_write = smc911x_phy_write;
2031
2032         /*
2033          * Locate the phy, if any.
2034          */
2035         smc911x_phy_detect(dev);
2036
2037         /* Set default parameters */
2038         lp->msg_enable = NETIF_MSG_LINK;
2039         lp->ctl_rfduplx = 1;
2040         lp->ctl_rspeed = 100;
2041
2042         /* Grab the IRQ */
2043         retval = request_irq(dev->irq, &smc911x_interrupt,
2044                         IRQF_SHARED | SMC_IRQ_SENSE, dev->name, dev);
2045         if (retval)
2046                 goto err_out;
2047
2048 #ifdef SMC_USE_DMA
2049         lp->rxdma = SMC_DMA_REQUEST(dev, smc911x_rx_dma_irq);
2050         lp->txdma = SMC_DMA_REQUEST(dev, smc911x_tx_dma_irq);
2051         lp->rxdma_active = 0;
2052         lp->txdma_active = 0;
2053         dev->dma = lp->rxdma;
2054 #endif
2055
2056         retval = register_netdev(dev);
2057         if (retval == 0) {
2058                 /* now, print out the card info, in a short format.. */
2059                 printk("%s: %s (rev %d) at %#lx IRQ %d",
2060                         dev->name, version_string, lp->revision,
2061                         dev->base_addr, dev->irq);
2062
2063 #ifdef SMC_USE_DMA
2064                 if (lp->rxdma != -1)
2065                         printk(" RXDMA %d ", lp->rxdma);
2066
2067                 if (lp->txdma != -1)
2068                         printk("TXDMA %d", lp->txdma);
2069 #endif
2070                 printk("\n");
2071                 if (!is_valid_ether_addr(dev->dev_addr)) {
2072                         printk("%s: Invalid ethernet MAC address. Please "
2073                                         "set using ifconfig\n", dev->name);
2074                 } else {
2075                         /* Print the Ethernet address */
2076                         printk("%s: Ethernet addr: ", dev->name);
2077                         for (i = 0; i < 5; i++)
2078                                 printk("%2.2x:", dev->dev_addr[i]);
2079                         printk("%2.2x\n", dev->dev_addr[5]);
2080                 }
2081
2082                 if (lp->phy_type == 0) {
2083                         PRINTK("%s: No PHY found\n", dev->name);
2084                 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2085                         PRINTK("%s: LAN911x Internal PHY\n", dev->name);
2086                 } else {
2087                         PRINTK("%s: External PHY 0x%08x\n", dev->name, lp->phy_type);
2088                 }
2089         }
2090
2091 err_out:
2092 #ifdef SMC_USE_DMA
2093         if (retval) {
2094                 if (lp->rxdma != -1) {
2095                         SMC_DMA_FREE(dev, lp->rxdma);
2096                 }
2097                 if (lp->txdma != -1) {
2098                         SMC_DMA_FREE(dev, lp->txdma);
2099                 }
2100         }
2101 #endif
2102         return retval;
2103 }
2104
2105 /*
2106  * smc911x_init(void)
2107  *
2108  *        Output:
2109  *       0 --> there is a device
2110  *       anything else, error
2111  */
2112 static int smc911x_drv_probe(struct platform_device *pdev)
2113 {
2114         struct net_device *ndev;
2115         struct resource *res;
2116         struct smc911x_local *lp;
2117         unsigned int *addr;
2118         int ret;
2119
2120         DBG(SMC_DEBUG_FUNC, "--> %s\n",  __FUNCTION__);
2121         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2122         if (!res) {
2123                 ret = -ENODEV;
2124                 goto out;
2125         }
2126
2127         /*
2128          * Request the regions.
2129          */
2130         if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2131                  ret = -EBUSY;
2132                  goto out;
2133         }
2134
2135         ndev = alloc_etherdev(sizeof(struct smc911x_local));
2136         if (!ndev) {
2137                 printk("%s: could not allocate device.\n", CARDNAME);
2138                 ret = -ENOMEM;
2139                 goto release_1;
2140         }
2141         SET_NETDEV_DEV(ndev, &pdev->dev);
2142
2143         ndev->dma = (unsigned char)-1;
2144         ndev->irq = platform_get_irq(pdev, 0);
2145         lp = netdev_priv(ndev);
2146         lp->netdev = ndev;
2147
2148         addr = ioremap(res->start, SMC911X_IO_EXTENT);
2149         if (!addr) {
2150                 ret = -ENOMEM;
2151                 goto release_both;
2152         }
2153
2154         platform_set_drvdata(pdev, ndev);
2155         ret = smc911x_probe(ndev, (unsigned long)addr);
2156         if (ret != 0) {
2157                 platform_set_drvdata(pdev, NULL);
2158                 iounmap(addr);
2159 release_both:
2160                 free_netdev(ndev);
2161 release_1:
2162                 release_mem_region(res->start, SMC911X_IO_EXTENT);
2163 out:
2164                 printk("%s: not found (%d).\n", CARDNAME, ret);
2165         }
2166 #ifdef SMC_USE_DMA
2167         else {
2168                 lp->physaddr = res->start;
2169                 lp->dev = &pdev->dev;
2170         }
2171 #endif
2172
2173         return ret;
2174 }
2175
2176 static int smc911x_drv_remove(struct platform_device *pdev)
2177 {
2178         struct net_device *ndev = platform_get_drvdata(pdev);
2179         struct resource *res;
2180
2181         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2182         platform_set_drvdata(pdev, NULL);
2183
2184         unregister_netdev(ndev);
2185
2186         free_irq(ndev->irq, ndev);
2187
2188 #ifdef SMC_USE_DMA
2189         {
2190                 struct smc911x_local *lp = netdev_priv(ndev);
2191                 if (lp->rxdma != -1) {
2192                         SMC_DMA_FREE(dev, lp->rxdma);
2193                 }
2194                 if (lp->txdma != -1) {
2195                         SMC_DMA_FREE(dev, lp->txdma);
2196                 }
2197         }
2198 #endif
2199         iounmap((void *)ndev->base_addr);
2200         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2201         release_mem_region(res->start, SMC911X_IO_EXTENT);
2202
2203         free_netdev(ndev);
2204         return 0;
2205 }
2206
2207 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2208 {
2209         struct net_device *ndev = platform_get_drvdata(dev);
2210         unsigned long ioaddr = ndev->base_addr;
2211
2212         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2213         if (ndev) {
2214                 if (netif_running(ndev)) {
2215                         netif_device_detach(ndev);
2216                         smc911x_shutdown(ndev);
2217 #if POWER_DOWN
2218                         /* Set D2 - Energy detect only setting */
2219                         SMC_SET_PMT_CTRL(2<<12);
2220 #endif
2221                 }
2222         }
2223         return 0;
2224 }
2225
2226 static int smc911x_drv_resume(struct platform_device *dev)
2227 {
2228         struct net_device *ndev = platform_get_drvdata(dev);
2229
2230         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2231         if (ndev) {
2232                 struct smc911x_local *lp = netdev_priv(ndev);
2233
2234                 if (netif_running(ndev)) {
2235                         smc911x_reset(ndev);
2236                         smc911x_enable(ndev);
2237                         if (lp->phy_type != 0)
2238                                 smc911x_phy_configure(&lp->phy_configure);
2239                         netif_device_attach(ndev);
2240                 }
2241         }
2242         return 0;
2243 }
2244
2245 static struct platform_driver smc911x_driver = {
2246         .probe           = smc911x_drv_probe,
2247         .remove  = smc911x_drv_remove,
2248         .suspend         = smc911x_drv_suspend,
2249         .resume  = smc911x_drv_resume,
2250         .driver  = {
2251                 .name    = CARDNAME,
2252                 .owner  = THIS_MODULE,
2253         },
2254 };
2255
2256 static int __init smc911x_init(void)
2257 {
2258         return platform_driver_register(&smc911x_driver);
2259 }
2260
2261 static void __exit smc911x_cleanup(void)
2262 {
2263         platform_driver_unregister(&smc911x_driver);
2264 }
2265
2266 module_init(smc911x_init);
2267 module_exit(smc911x_cleanup);