net drivers: fix platform driver hotplug/coldplug
[linux-2.6.git] / 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         int work_pending;
140
141         int tx_throttle;
142         spinlock_t lock;
143
144         struct net_device *netdev;
145
146 #ifdef SMC_USE_DMA
147         /* DMA needs the physical address of the chip */
148         u_long physaddr;
149         int rxdma;
150         int txdma;
151         int rxdma_active;
152         int txdma_active;
153         struct sk_buff *current_rx_skb;
154         struct sk_buff *current_tx_skb;
155         struct device *dev;
156 #endif
157 };
158
159 #if SMC_DEBUG > 0
160 #define DBG(n, args...)                          \
161         do {                                     \
162                 if (SMC_DEBUG & (n))             \
163                         printk(args);            \
164         } while (0)
165
166 #define PRINTK(args...)   printk(args)
167 #else
168 #define DBG(n, args...)   do { } while (0)
169 #define PRINTK(args...)   printk(KERN_DEBUG args)
170 #endif
171
172 #if SMC_DEBUG_PKTS > 0
173 static void PRINT_PKT(u_char *buf, int length)
174 {
175         int i;
176         int remainder;
177         int lines;
178
179         lines = length / 16;
180         remainder = length % 16;
181
182         for (i = 0; i < lines ; i ++) {
183                 int cur;
184                 for (cur = 0; cur < 8; cur++) {
185                         u_char a, b;
186                         a = *buf++;
187                         b = *buf++;
188                         printk("%02x%02x ", a, b);
189                 }
190                 printk("\n");
191         }
192         for (i = 0; i < remainder/2 ; i++) {
193                 u_char a, b;
194                 a = *buf++;
195                 b = *buf++;
196                 printk("%02x%02x ", a, b);
197         }
198         printk("\n");
199 }
200 #else
201 #define PRINT_PKT(x...)  do { } while (0)
202 #endif
203
204
205 /* this enables an interrupt in the interrupt mask register */
206 #define SMC_ENABLE_INT(x) do {                          \
207         unsigned int  __mask;                           \
208         unsigned long __flags;                          \
209         spin_lock_irqsave(&lp->lock, __flags);          \
210         __mask = SMC_GET_INT_EN();                      \
211         __mask |= (x);                                  \
212         SMC_SET_INT_EN(__mask);                         \
213         spin_unlock_irqrestore(&lp->lock, __flags);     \
214 } while (0)
215
216 /* this disables an interrupt from the interrupt mask register */
217 #define SMC_DISABLE_INT(x) do {                         \
218         unsigned int  __mask;                           \
219         unsigned long __flags;                          \
220         spin_lock_irqsave(&lp->lock, __flags);          \
221         __mask = SMC_GET_INT_EN();                      \
222         __mask &= ~(x);                                 \
223         SMC_SET_INT_EN(__mask);                         \
224         spin_unlock_irqrestore(&lp->lock, __flags);     \
225 } while (0)
226
227 /*
228  * this does a soft reset on the device
229  */
230 static void smc911x_reset(struct net_device *dev)
231 {
232         unsigned long ioaddr = dev->base_addr;
233         struct smc911x_local *lp = netdev_priv(dev);
234         unsigned int reg, timeout=0, resets=1;
235         unsigned long flags;
236
237         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
238
239         /*       Take out of PM setting first */
240         if ((SMC_GET_PMT_CTRL() & PMT_CTRL_READY_) == 0) {
241                 /* Write to the bytetest will take out of powerdown */
242                 SMC_SET_BYTE_TEST(0);
243                 timeout=10;
244                 do {
245                         udelay(10);
246                         reg = SMC_GET_PMT_CTRL() & PMT_CTRL_READY_;
247                 } while ( timeout-- && !reg);
248                 if (timeout == 0) {
249                         PRINTK("%s: smc911x_reset timeout waiting for PM restore\n", dev->name);
250                         return;
251                 }
252         }
253
254         /* Disable all interrupts */
255         spin_lock_irqsave(&lp->lock, flags);
256         SMC_SET_INT_EN(0);
257         spin_unlock_irqrestore(&lp->lock, flags);
258
259         while (resets--) {
260                 SMC_SET_HW_CFG(HW_CFG_SRST_);
261                 timeout=10;
262                 do {
263                         udelay(10);
264                         reg = SMC_GET_HW_CFG();
265                         /* If chip indicates reset timeout then try again */
266                         if (reg & HW_CFG_SRST_TO_) {
267                                 PRINTK("%s: chip reset timeout, retrying...\n", dev->name);
268                                 resets++;
269                                 break;
270                         }
271                 } while ( timeout-- && (reg & HW_CFG_SRST_));
272         }
273         if (timeout == 0) {
274                 PRINTK("%s: smc911x_reset timeout waiting for reset\n", dev->name);
275                 return;
276         }
277
278         /* make sure EEPROM has finished loading before setting GPIO_CFG */
279         timeout=1000;
280         while ( timeout-- && (SMC_GET_E2P_CMD() & E2P_CMD_EPC_BUSY_)) {
281                 udelay(10);
282         }
283         if (timeout == 0){
284                 PRINTK("%s: smc911x_reset timeout waiting for EEPROM busy\n", dev->name);
285                 return;
286         }
287
288         /* Initialize interrupts */
289         SMC_SET_INT_EN(0);
290         SMC_ACK_INT(-1);
291
292         /* Reset the FIFO level and flow control settings */
293         SMC_SET_HW_CFG((lp->tx_fifo_kb & 0xF) << 16);
294 //TODO: Figure out what appropriate pause time is
295         SMC_SET_FLOW(FLOW_FCPT_ | FLOW_FCEN_);
296         SMC_SET_AFC_CFG(lp->afc_cfg);
297
298
299         /* Set to LED outputs */
300         SMC_SET_GPIO_CFG(0x70070000);
301
302         /*
303          * Deassert IRQ for 1*10us for edge type interrupts
304          * and drive IRQ pin push-pull
305          */
306         SMC_SET_IRQ_CFG( (1 << 24) | INT_CFG_IRQ_EN_ | INT_CFG_IRQ_TYPE_ );
307
308         /* clear anything saved */
309         if (lp->pending_tx_skb != NULL) {
310                 dev_kfree_skb (lp->pending_tx_skb);
311                 lp->pending_tx_skb = NULL;
312                 dev->stats.tx_errors++;
313                 dev->stats.tx_aborted_errors++;
314         }
315 }
316
317 /*
318  * Enable Interrupts, Receive, and Transmit
319  */
320 static void smc911x_enable(struct net_device *dev)
321 {
322         unsigned long ioaddr = dev->base_addr;
323         struct smc911x_local *lp = netdev_priv(dev);
324         unsigned mask, cfg, cr;
325         unsigned long flags;
326
327         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
328
329         SMC_SET_MAC_ADDR(dev->dev_addr);
330
331         /* Enable TX */
332         cfg = SMC_GET_HW_CFG();
333         cfg &= HW_CFG_TX_FIF_SZ_ | 0xFFF;
334         cfg |= HW_CFG_SF_;
335         SMC_SET_HW_CFG(cfg);
336         SMC_SET_FIFO_TDA(0xFF);
337         /* Update TX stats on every 64 packets received or every 1 sec */
338         SMC_SET_FIFO_TSL(64);
339         SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
340
341         spin_lock_irqsave(&lp->lock, flags);
342         SMC_GET_MAC_CR(cr);
343         cr |= MAC_CR_TXEN_ | MAC_CR_HBDIS_;
344         SMC_SET_MAC_CR(cr);
345         SMC_SET_TX_CFG(TX_CFG_TX_ON_);
346         spin_unlock_irqrestore(&lp->lock, flags);
347
348         /* Add 2 byte padding to start of packets */
349         SMC_SET_RX_CFG((2<<8) & RX_CFG_RXDOFF_);
350
351         /* Turn on receiver and enable RX */
352         if (cr & MAC_CR_RXEN_)
353                 DBG(SMC_DEBUG_RX, "%s: Receiver already enabled\n", dev->name);
354
355         spin_lock_irqsave(&lp->lock, flags);
356         SMC_SET_MAC_CR( cr | MAC_CR_RXEN_ );
357         spin_unlock_irqrestore(&lp->lock, flags);
358
359         /* Interrupt on every received packet */
360         SMC_SET_FIFO_RSA(0x01);
361         SMC_SET_FIFO_RSL(0x00);
362
363         /* now, enable interrupts */
364         mask = INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_ | INT_EN_RSFL_EN_ |
365                 INT_EN_GPT_INT_EN_ | INT_EN_RXDFH_INT_EN_ | INT_EN_RXE_EN_ |
366                 INT_EN_PHY_INT_EN_;
367         if (IS_REV_A(lp->revision))
368                 mask|=INT_EN_RDFL_EN_;
369         else {
370                 mask|=INT_EN_RDFO_EN_;
371         }
372         SMC_ENABLE_INT(mask);
373 }
374
375 /*
376  * this puts the device in an inactive state
377  */
378 static void smc911x_shutdown(struct net_device *dev)
379 {
380         unsigned long ioaddr = dev->base_addr;
381         struct smc911x_local *lp = netdev_priv(dev);
382         unsigned cr;
383         unsigned long flags;
384
385         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", CARDNAME, __FUNCTION__);
386
387         /* Disable IRQ's */
388         SMC_SET_INT_EN(0);
389
390         /* Turn of Rx and TX */
391         spin_lock_irqsave(&lp->lock, flags);
392         SMC_GET_MAC_CR(cr);
393         cr &= ~(MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
394         SMC_SET_MAC_CR(cr);
395         SMC_SET_TX_CFG(TX_CFG_STOP_TX_);
396         spin_unlock_irqrestore(&lp->lock, flags);
397 }
398
399 static inline void smc911x_drop_pkt(struct net_device *dev)
400 {
401         unsigned long ioaddr = dev->base_addr;
402         unsigned int fifo_count, timeout, reg;
403
404         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, "%s: --> %s\n", CARDNAME, __FUNCTION__);
405         fifo_count = SMC_GET_RX_FIFO_INF() & 0xFFFF;
406         if (fifo_count <= 4) {
407                 /* Manually dump the packet data */
408                 while (fifo_count--)
409                         SMC_GET_RX_FIFO();
410         } else   {
411                 /* Fast forward through the bad packet */
412                 SMC_SET_RX_DP_CTRL(RX_DP_CTRL_FFWD_BUSY_);
413                 timeout=50;
414                 do {
415                         udelay(10);
416                         reg = SMC_GET_RX_DP_CTRL() & RX_DP_CTRL_FFWD_BUSY_;
417                 } while ( timeout-- && reg);
418                 if (timeout == 0) {
419                         PRINTK("%s: timeout waiting for RX fast forward\n", dev->name);
420                 }
421         }
422 }
423
424 /*
425  * This is the procedure to handle the receipt of a packet.
426  * It should be called after checking for packet presence in
427  * the RX status FIFO.   It must be called with the spin lock
428  * already held.
429  */
430 static inline void       smc911x_rcv(struct net_device *dev)
431 {
432         unsigned long ioaddr = dev->base_addr;
433         unsigned int pkt_len, status;
434         struct sk_buff *skb;
435         unsigned char *data;
436
437         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, "%s: --> %s\n",
438                 dev->name, __FUNCTION__);
439         status = SMC_GET_RX_STS_FIFO();
440         DBG(SMC_DEBUG_RX, "%s: Rx pkt len %d status 0x%08x \n",
441                 dev->name, (status & 0x3fff0000) >> 16, status & 0xc000ffff);
442         pkt_len = (status & RX_STS_PKT_LEN_) >> 16;
443         if (status & RX_STS_ES_) {
444                 /* Deal with a bad packet */
445                 dev->stats.rx_errors++;
446                 if (status & RX_STS_CRC_ERR_)
447                         dev->stats.rx_crc_errors++;
448                 else {
449                         if (status & RX_STS_LEN_ERR_)
450                                 dev->stats.rx_length_errors++;
451                         if (status & RX_STS_MCAST_)
452                                 dev->stats.multicast++;
453                 }
454                 /* Remove the bad packet data from the RX FIFO */
455                 smc911x_drop_pkt(dev);
456         } else {
457                 /* Receive a valid packet */
458                 /* Alloc a buffer with extra room for DMA alignment */
459                 skb=dev_alloc_skb(pkt_len+32);
460                 if (unlikely(skb == NULL)) {
461                         PRINTK( "%s: Low memory, rcvd packet dropped.\n",
462                                 dev->name);
463                         dev->stats.rx_dropped++;
464                         smc911x_drop_pkt(dev);
465                         return;
466                 }
467                 /* Align IP header to 32 bits
468                  * Note that the device is configured to add a 2
469                  * byte padding to the packet start, so we really
470                  * want to write to the orignal data pointer */
471                 data = skb->data;
472                 skb_reserve(skb, 2);
473                 skb_put(skb,pkt_len-4);
474 #ifdef SMC_USE_DMA
475                 {
476                 struct smc911x_local *lp = netdev_priv(dev);
477                 unsigned int fifo;
478                 /* Lower the FIFO threshold if possible */
479                 fifo = SMC_GET_FIFO_INT();
480                 if (fifo & 0xFF) fifo--;
481                 DBG(SMC_DEBUG_RX, "%s: Setting RX stat FIFO threshold to %d\n",
482                         dev->name, fifo & 0xff);
483                 SMC_SET_FIFO_INT(fifo);
484                 /* Setup RX DMA */
485                 SMC_SET_RX_CFG(RX_CFG_RX_END_ALGN16_ | ((2<<8) & RX_CFG_RXDOFF_));
486                 lp->rxdma_active = 1;
487                 lp->current_rx_skb = skb;
488                 SMC_PULL_DATA(data, (pkt_len+2+15) & ~15);
489                 /* Packet processing deferred to DMA RX interrupt */
490                 }
491 #else
492                 SMC_SET_RX_CFG(RX_CFG_RX_END_ALGN4_ | ((2<<8) & RX_CFG_RXDOFF_));
493                 SMC_PULL_DATA(data, pkt_len+2+3);
494
495                 DBG(SMC_DEBUG_PKTS, "%s: Received packet\n", dev->name);
496                 PRINT_PKT(data, ((pkt_len - 4) <= 64) ? pkt_len - 4 : 64);
497                 dev->last_rx = jiffies;
498                 skb->protocol = eth_type_trans(skb, dev);
499                 netif_rx(skb);
500                 dev->stats.rx_packets++;
501                 dev->stats.rx_bytes += pkt_len-4;
502 #endif
503         }
504 }
505
506 /*
507  * This is called to actually send a packet to the chip.
508  */
509 static void smc911x_hardware_send_pkt(struct net_device *dev)
510 {
511         struct smc911x_local *lp = netdev_priv(dev);
512         unsigned long ioaddr = dev->base_addr;
513         struct sk_buff *skb;
514         unsigned int cmdA, cmdB, len;
515         unsigned char *buf;
516         unsigned long flags;
517
518         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n", dev->name, __FUNCTION__);
519         BUG_ON(lp->pending_tx_skb == NULL);
520
521         skb = lp->pending_tx_skb;
522         lp->pending_tx_skb = NULL;
523
524         /* cmdA {25:24] data alignment [20:16] start offset [10:0] buffer length */
525         /* cmdB {31:16] pkt tag [10:0] length */
526 #ifdef SMC_USE_DMA
527         /* 16 byte buffer alignment mode */
528         buf = (char*)((u32)(skb->data) & ~0xF);
529         len = (skb->len + 0xF + ((u32)skb->data & 0xF)) & ~0xF;
530         cmdA = (1<<24) | (((u32)skb->data & 0xF)<<16) |
531                         TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
532                         skb->len;
533 #else
534         buf = (char*)((u32)skb->data & ~0x3);
535         len = (skb->len + 3 + ((u32)skb->data & 3)) & ~0x3;
536         cmdA = (((u32)skb->data & 0x3) << 16) |
537                         TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
538                         skb->len;
539 #endif
540         /* tag is packet length so we can use this in stats update later */
541         cmdB = (skb->len  << 16) | (skb->len & 0x7FF);
542
543         DBG(SMC_DEBUG_TX, "%s: TX PKT LENGTH 0x%04x (%d) BUF 0x%p CMDA 0x%08x CMDB 0x%08x\n",
544                  dev->name, len, len, buf, cmdA, cmdB);
545         SMC_SET_TX_FIFO(cmdA);
546         SMC_SET_TX_FIFO(cmdB);
547
548         DBG(SMC_DEBUG_PKTS, "%s: Transmitted packet\n", dev->name);
549         PRINT_PKT(buf, len <= 64 ? len : 64);
550
551         /* Send pkt via PIO or DMA */
552 #ifdef SMC_USE_DMA
553         lp->current_tx_skb = skb;
554         SMC_PUSH_DATA(buf, len);
555         /* DMA complete IRQ will free buffer and set jiffies */
556 #else
557         SMC_PUSH_DATA(buf, len);
558         dev->trans_start = jiffies;
559         dev_kfree_skb(skb);
560 #endif
561         spin_lock_irqsave(&lp->lock, flags);
562         if (!lp->tx_throttle) {
563                 netif_wake_queue(dev);
564         }
565         spin_unlock_irqrestore(&lp->lock, flags);
566         SMC_ENABLE_INT(INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_);
567 }
568
569 /*
570  * Since I am not sure if I will have enough room in the chip's ram
571  * to store the packet, I call this routine which either sends it
572  * now, or set the card to generates an interrupt when ready
573  * for the packet.
574  */
575 static int smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
576 {
577         struct smc911x_local *lp = netdev_priv(dev);
578         unsigned long ioaddr = dev->base_addr;
579         unsigned int free;
580         unsigned long flags;
581
582         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n",
583                 dev->name, __FUNCTION__);
584
585         BUG_ON(lp->pending_tx_skb != NULL);
586
587         free = SMC_GET_TX_FIFO_INF() & TX_FIFO_INF_TDFREE_;
588         DBG(SMC_DEBUG_TX, "%s: TX free space %d\n", dev->name, free);
589
590         /* Turn off the flow when running out of space in FIFO */
591         if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
592                 DBG(SMC_DEBUG_TX, "%s: Disabling data flow due to low FIFO space (%d)\n",
593                         dev->name, free);
594                 spin_lock_irqsave(&lp->lock, flags);
595                 /* Reenable when at least 1 packet of size MTU present */
596                 SMC_SET_FIFO_TDA((SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
597                 lp->tx_throttle = 1;
598                 netif_stop_queue(dev);
599                 spin_unlock_irqrestore(&lp->lock, flags);
600         }
601
602         /* Drop packets when we run out of space in TX FIFO
603          * Account for overhead required for:
604          *
605          *        Tx command words                       8 bytes
606          *        Start offset                           15 bytes
607          *        End padding                            15 bytes
608          */
609         if (unlikely(free < (skb->len + 8 + 15 + 15))) {
610                 printk("%s: No Tx free space %d < %d\n",
611                         dev->name, free, skb->len);
612                 lp->pending_tx_skb = NULL;
613                 dev->stats.tx_errors++;
614                 dev->stats.tx_dropped++;
615                 dev_kfree_skb(skb);
616                 return 0;
617         }
618
619 #ifdef SMC_USE_DMA
620         {
621                 /* If the DMA is already running then defer this packet Tx until
622                  * the DMA IRQ starts it
623                  */
624                 spin_lock_irqsave(&lp->lock, flags);
625                 if (lp->txdma_active) {
626                         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: Tx DMA running, deferring packet\n", dev->name);
627                         lp->pending_tx_skb = skb;
628                         netif_stop_queue(dev);
629                         spin_unlock_irqrestore(&lp->lock, flags);
630                         return 0;
631                 } else {
632                         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: Activating Tx DMA\n", dev->name);
633                         lp->txdma_active = 1;
634                 }
635                 spin_unlock_irqrestore(&lp->lock, flags);
636         }
637 #endif
638         lp->pending_tx_skb = skb;
639         smc911x_hardware_send_pkt(dev);
640
641         return 0;
642 }
643
644 /*
645  * This handles a TX status interrupt, which is only called when:
646  * - a TX error occurred, or
647  * - TX of a packet completed.
648  */
649 static void smc911x_tx(struct net_device *dev)
650 {
651         unsigned long ioaddr = dev->base_addr;
652         struct smc911x_local *lp = netdev_priv(dev);
653         unsigned int tx_status;
654
655         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n",
656                 dev->name, __FUNCTION__);
657
658         /* Collect the TX status */
659         while (((SMC_GET_TX_FIFO_INF() & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
660                 DBG(SMC_DEBUG_TX, "%s: Tx stat FIFO used 0x%04x\n",
661                         dev->name,
662                         (SMC_GET_TX_FIFO_INF() & TX_FIFO_INF_TSUSED_) >> 16);
663                 tx_status = SMC_GET_TX_STS_FIFO();
664                 dev->stats.tx_packets++;
665                 dev->stats.tx_bytes+=tx_status>>16;
666                 DBG(SMC_DEBUG_TX, "%s: Tx FIFO tag 0x%04x status 0x%04x\n",
667                         dev->name, (tx_status & 0xffff0000) >> 16,
668                         tx_status & 0x0000ffff);
669                 /* count Tx errors, but ignore lost carrier errors when in
670                  * full-duplex mode */
671                 if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
672                     !(tx_status & 0x00000306))) {
673                         dev->stats.tx_errors++;
674                 }
675                 if (tx_status & TX_STS_MANY_COLL_) {
676                         dev->stats.collisions+=16;
677                         dev->stats.tx_aborted_errors++;
678                 } else {
679                         dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
680                 }
681                 /* carrier error only has meaning for half-duplex communication */
682                 if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
683                     !lp->ctl_rfduplx) {
684                         dev->stats.tx_carrier_errors++;
685                 }
686                 if (tx_status & TX_STS_LATE_COLL_) {
687                         dev->stats.collisions++;
688                         dev->stats.tx_aborted_errors++;
689                 }
690         }
691 }
692
693
694 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
695 /*
696  * Reads a register from the MII Management serial interface
697  */
698
699 static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
700 {
701         unsigned long ioaddr = dev->base_addr;
702         unsigned int phydata;
703
704         SMC_GET_MII(phyreg, phyaddr, phydata);
705
706         DBG(SMC_DEBUG_MISC, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
707                 __FUNCTION__, phyaddr, phyreg, phydata);
708         return phydata;
709 }
710
711
712 /*
713  * Writes a register to the MII Management serial interface
714  */
715 static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
716                         int phydata)
717 {
718         unsigned long ioaddr = dev->base_addr;
719
720         DBG(SMC_DEBUG_MISC, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
721                 __FUNCTION__, phyaddr, phyreg, phydata);
722
723         SMC_SET_MII(phyreg, phyaddr, phydata);
724 }
725
726 /*
727  * Finds and reports the PHY address (115 and 117 have external
728  * PHY interface 118 has internal only
729  */
730 static void smc911x_phy_detect(struct net_device *dev)
731 {
732         unsigned long ioaddr = dev->base_addr;
733         struct smc911x_local *lp = netdev_priv(dev);
734         int phyaddr;
735         unsigned int cfg, id1, id2;
736
737         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
738
739         lp->phy_type = 0;
740
741         /*
742          * Scan all 32 PHY addresses if necessary, starting at
743          * PHY#1 to PHY#31, and then PHY#0 last.
744          */
745         switch(lp->version) {
746                 case 0x115:
747                 case 0x117:
748                         cfg = SMC_GET_HW_CFG();
749                         if (cfg & HW_CFG_EXT_PHY_DET_) {
750                                 cfg &= ~HW_CFG_PHY_CLK_SEL_;
751                                 cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
752                                 SMC_SET_HW_CFG(cfg);
753                                 udelay(10); /* Wait for clocks to stop */
754
755                                 cfg |= HW_CFG_EXT_PHY_EN_;
756                                 SMC_SET_HW_CFG(cfg);
757                                 udelay(10); /* Wait for clocks to stop */
758
759                                 cfg &= ~HW_CFG_PHY_CLK_SEL_;
760                                 cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
761                                 SMC_SET_HW_CFG(cfg);
762                                 udelay(10); /* Wait for clocks to stop */
763
764                                 cfg |= HW_CFG_SMI_SEL_;
765                                 SMC_SET_HW_CFG(cfg);
766
767                                 for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
768
769                                         /* Read the PHY identifiers */
770                                         SMC_GET_PHY_ID1(phyaddr & 31, id1);
771                                         SMC_GET_PHY_ID2(phyaddr & 31, id2);
772
773                                         /* Make sure it is a valid identifier */
774                                         if (id1 != 0x0000 && id1 != 0xffff &&
775                                             id1 != 0x8000 && id2 != 0x0000 &&
776                                             id2 != 0xffff && id2 != 0x8000) {
777                                                 /* Save the PHY's address */
778                                                 lp->mii.phy_id = phyaddr & 31;
779                                                 lp->phy_type = id1 << 16 | id2;
780                                                 break;
781                                         }
782                                 }
783                         }
784                 default:
785                         /* Internal media only */
786                         SMC_GET_PHY_ID1(1, id1);
787                         SMC_GET_PHY_ID2(1, id2);
788                         /* Save the PHY's address */
789                         lp->mii.phy_id = 1;
790                         lp->phy_type = id1 << 16 | id2;
791         }
792
793         DBG(SMC_DEBUG_MISC, "%s: phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%d\n",
794                 dev->name, id1, id2, lp->mii.phy_id);
795 }
796
797 /*
798  * Sets the PHY to a configuration as determined by the user.
799  * Called with spin_lock held.
800  */
801 static int smc911x_phy_fixed(struct net_device *dev)
802 {
803         struct smc911x_local *lp = netdev_priv(dev);
804         unsigned long ioaddr = dev->base_addr;
805         int phyaddr = lp->mii.phy_id;
806         int bmcr;
807
808         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
809
810         /* Enter Link Disable state */
811         SMC_GET_PHY_BMCR(phyaddr, bmcr);
812         bmcr |= BMCR_PDOWN;
813         SMC_SET_PHY_BMCR(phyaddr, bmcr);
814
815         /*
816          * Set our fixed capabilities
817          * Disable auto-negotiation
818          */
819         bmcr &= ~BMCR_ANENABLE;
820         if (lp->ctl_rfduplx)
821                 bmcr |= BMCR_FULLDPLX;
822
823         if (lp->ctl_rspeed == 100)
824                 bmcr |= BMCR_SPEED100;
825
826         /* Write our capabilities to the phy control register */
827         SMC_SET_PHY_BMCR(phyaddr, bmcr);
828
829         /* Re-Configure the Receive/Phy Control register */
830         bmcr &= ~BMCR_PDOWN;
831         SMC_SET_PHY_BMCR(phyaddr, bmcr);
832
833         return 1;
834 }
835
836 /*
837  * smc911x_phy_reset - reset the phy
838  * @dev: net device
839  * @phy: phy address
840  *
841  * Issue a software reset for the specified PHY and
842  * wait up to 100ms for the reset to complete.   We should
843  * not access the PHY for 50ms after issuing the reset.
844  *
845  * The time to wait appears to be dependent on the PHY.
846  *
847  */
848 static int smc911x_phy_reset(struct net_device *dev, int phy)
849 {
850         struct smc911x_local *lp = netdev_priv(dev);
851         unsigned long ioaddr = dev->base_addr;
852         int timeout;
853         unsigned long flags;
854         unsigned int reg;
855
856         DBG(SMC_DEBUG_FUNC, "%s: --> %s()\n", dev->name, __FUNCTION__);
857
858         spin_lock_irqsave(&lp->lock, flags);
859         reg = SMC_GET_PMT_CTRL();
860         reg &= ~0xfffff030;
861         reg |= PMT_CTRL_PHY_RST_;
862         SMC_SET_PMT_CTRL(reg);
863         spin_unlock_irqrestore(&lp->lock, flags);
864         for (timeout = 2; timeout; timeout--) {
865                 msleep(50);
866                 spin_lock_irqsave(&lp->lock, flags);
867                 reg = SMC_GET_PMT_CTRL();
868                 spin_unlock_irqrestore(&lp->lock, flags);
869                 if (!(reg & PMT_CTRL_PHY_RST_)) {
870                         /* extra delay required because the phy may
871                          * not be completed with its reset
872                          * when PHY_BCR_RESET_ is cleared. 256us
873                          * should suffice, but use 500us to be safe
874                          */
875                         udelay(500);
876                 break;
877                 }
878         }
879
880         return reg & PMT_CTRL_PHY_RST_;
881 }
882
883 /*
884  * smc911x_phy_powerdown - powerdown phy
885  * @dev: net device
886  * @phy: phy address
887  *
888  * Power down the specified PHY
889  */
890 static void smc911x_phy_powerdown(struct net_device *dev, int phy)
891 {
892         unsigned long ioaddr = dev->base_addr;
893         unsigned int bmcr;
894
895         /* Enter Link Disable state */
896         SMC_GET_PHY_BMCR(phy, bmcr);
897         bmcr |= BMCR_PDOWN;
898         SMC_SET_PHY_BMCR(phy, bmcr);
899 }
900
901 /*
902  * smc911x_phy_check_media - check the media status and adjust BMCR
903  * @dev: net device
904  * @init: set true for initialisation
905  *
906  * Select duplex mode depending on negotiation state.   This
907  * also updates our carrier state.
908  */
909 static void smc911x_phy_check_media(struct net_device *dev, int init)
910 {
911         struct smc911x_local *lp = netdev_priv(dev);
912         unsigned long ioaddr = dev->base_addr;
913         int phyaddr = lp->mii.phy_id;
914         unsigned int bmcr, cr;
915
916         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
917
918         if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
919                 /* duplex state has changed */
920                 SMC_GET_PHY_BMCR(phyaddr, bmcr);
921                 SMC_GET_MAC_CR(cr);
922                 if (lp->mii.full_duplex) {
923                         DBG(SMC_DEBUG_MISC, "%s: Configuring for full-duplex mode\n", dev->name);
924                         bmcr |= BMCR_FULLDPLX;
925                         cr |= MAC_CR_RCVOWN_;
926                 } else {
927                         DBG(SMC_DEBUG_MISC, "%s: Configuring for half-duplex mode\n", dev->name);
928                         bmcr &= ~BMCR_FULLDPLX;
929                         cr &= ~MAC_CR_RCVOWN_;
930                 }
931                 SMC_SET_PHY_BMCR(phyaddr, bmcr);
932                 SMC_SET_MAC_CR(cr);
933         }
934 }
935
936 /*
937  * Configures the specified PHY through the MII management interface
938  * using Autonegotiation.
939  * Calls smc911x_phy_fixed() if the user has requested a certain config.
940  * If RPC ANEG bit is set, the media selection is dependent purely on
941  * the selection by the MII (either in the MII BMCR reg or the result
942  * of autonegotiation.)  If the RPC ANEG bit is cleared, the selection
943  * is controlled by the RPC SPEED and RPC DPLX bits.
944  */
945 static void smc911x_phy_configure(struct work_struct *work)
946 {
947         struct smc911x_local *lp = container_of(work, struct smc911x_local,
948                                                 phy_configure);
949         struct net_device *dev = lp->netdev;
950         unsigned long ioaddr = dev->base_addr;
951         int phyaddr = lp->mii.phy_id;
952         int my_phy_caps; /* My PHY capabilities */
953         int my_ad_caps; /* My Advertised capabilities */
954         int status;
955         unsigned long flags;
956
957         DBG(SMC_DEBUG_FUNC, "%s: --> %s()\n", dev->name, __FUNCTION__);
958
959         /*
960          * We should not be called if phy_type is zero.
961          */
962         if (lp->phy_type == 0)
963                  goto smc911x_phy_configure_exit_nolock;
964
965         if (smc911x_phy_reset(dev, phyaddr)) {
966                 printk("%s: PHY reset timed out\n", dev->name);
967                 goto smc911x_phy_configure_exit_nolock;
968         }
969         spin_lock_irqsave(&lp->lock, flags);
970
971         /*
972          * Enable PHY Interrupts (for register 18)
973          * Interrupts listed here are enabled
974          */
975         SMC_SET_PHY_INT_MASK(phyaddr, PHY_INT_MASK_ENERGY_ON_ |
976                  PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
977                  PHY_INT_MASK_LINK_DOWN_);
978
979         /* If the user requested no auto neg, then go set his request */
980         if (lp->mii.force_media) {
981                 smc911x_phy_fixed(dev);
982                 goto smc911x_phy_configure_exit;
983         }
984
985         /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
986         SMC_GET_PHY_BMSR(phyaddr, my_phy_caps);
987         if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
988                 printk(KERN_INFO "Auto negotiation NOT supported\n");
989                 smc911x_phy_fixed(dev);
990                 goto smc911x_phy_configure_exit;
991         }
992
993         /* CSMA capable w/ both pauses */
994         my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
995
996         if (my_phy_caps & BMSR_100BASE4)
997                 my_ad_caps |= ADVERTISE_100BASE4;
998         if (my_phy_caps & BMSR_100FULL)
999                 my_ad_caps |= ADVERTISE_100FULL;
1000         if (my_phy_caps & BMSR_100HALF)
1001                 my_ad_caps |= ADVERTISE_100HALF;
1002         if (my_phy_caps & BMSR_10FULL)
1003                 my_ad_caps |= ADVERTISE_10FULL;
1004         if (my_phy_caps & BMSR_10HALF)
1005                 my_ad_caps |= ADVERTISE_10HALF;
1006
1007         /* Disable capabilities not selected by our user */
1008         if (lp->ctl_rspeed != 100)
1009                 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
1010
1011          if (!lp->ctl_rfduplx)
1012                 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
1013
1014         /* Update our Auto-Neg Advertisement Register */
1015         SMC_SET_PHY_MII_ADV(phyaddr, my_ad_caps);
1016         lp->mii.advertising = my_ad_caps;
1017
1018         /*
1019          * Read the register back.       Without this, it appears that when
1020          * auto-negotiation is restarted, sometimes it isn't ready and
1021          * the link does not come up.
1022          */
1023         udelay(10);
1024         SMC_GET_PHY_MII_ADV(phyaddr, status);
1025
1026         DBG(SMC_DEBUG_MISC, "%s: phy caps=0x%04x\n", dev->name, my_phy_caps);
1027         DBG(SMC_DEBUG_MISC, "%s: phy advertised caps=0x%04x\n", dev->name, my_ad_caps);
1028
1029         /* Restart auto-negotiation process in order to advertise my caps */
1030         SMC_SET_PHY_BMCR(phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
1031
1032         smc911x_phy_check_media(dev, 1);
1033
1034 smc911x_phy_configure_exit:
1035         spin_unlock_irqrestore(&lp->lock, flags);
1036 smc911x_phy_configure_exit_nolock:
1037         lp->work_pending = 0;
1038 }
1039
1040 /*
1041  * smc911x_phy_interrupt
1042  *
1043  * Purpose:  Handle interrupts relating to PHY register 18. This is
1044  *       called from the "hard" interrupt handler under our private spinlock.
1045  */
1046 static void smc911x_phy_interrupt(struct net_device *dev)
1047 {
1048         struct smc911x_local *lp = netdev_priv(dev);
1049         unsigned long ioaddr = dev->base_addr;
1050         int phyaddr = lp->mii.phy_id;
1051         int status;
1052
1053         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1054
1055         if (lp->phy_type == 0)
1056                 return;
1057
1058         smc911x_phy_check_media(dev, 0);
1059         /* read to clear status bits */
1060         SMC_GET_PHY_INT_SRC(phyaddr,status);
1061         DBG(SMC_DEBUG_MISC, "%s: PHY interrupt status 0x%04x\n",
1062                 dev->name, status & 0xffff);
1063         DBG(SMC_DEBUG_MISC, "%s: AFC_CFG 0x%08x\n",
1064                 dev->name, SMC_GET_AFC_CFG());
1065 }
1066
1067 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1068
1069 /*
1070  * This is the main routine of the driver, to handle the device when
1071  * it needs some attention.
1072  */
1073 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1074 {
1075         struct net_device *dev = dev_id;
1076         unsigned long ioaddr = dev->base_addr;
1077         struct smc911x_local *lp = netdev_priv(dev);
1078         unsigned int status, mask, timeout;
1079         unsigned int rx_overrun=0, cr, pkts;
1080         unsigned long flags;
1081
1082         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1083
1084         spin_lock_irqsave(&lp->lock, flags);
1085
1086         /* Spurious interrupt check */
1087         if ((SMC_GET_IRQ_CFG() & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1088                 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1089                 spin_unlock_irqrestore(&lp->lock, flags);
1090                 return IRQ_NONE;
1091         }
1092
1093         mask = SMC_GET_INT_EN();
1094         SMC_SET_INT_EN(0);
1095
1096         /* set a timeout value, so I don't stay here forever */
1097         timeout = 8;
1098
1099
1100         do {
1101                 status = SMC_GET_INT();
1102
1103                 DBG(SMC_DEBUG_MISC, "%s: INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1104                         dev->name, status, mask, status & ~mask);
1105
1106                 status &= mask;
1107                 if (!status)
1108                         break;
1109
1110                 /* Handle SW interrupt condition */
1111                 if (status & INT_STS_SW_INT_) {
1112                         SMC_ACK_INT(INT_STS_SW_INT_);
1113                         mask &= ~INT_EN_SW_INT_EN_;
1114                 }
1115                 /* Handle various error conditions */
1116                 if (status & INT_STS_RXE_) {
1117                         SMC_ACK_INT(INT_STS_RXE_);
1118                         dev->stats.rx_errors++;
1119                 }
1120                 if (status & INT_STS_RXDFH_INT_) {
1121                         SMC_ACK_INT(INT_STS_RXDFH_INT_);
1122                         dev->stats.rx_dropped+=SMC_GET_RX_DROP();
1123                  }
1124                 /* Undocumented interrupt-what is the right thing to do here? */
1125                 if (status & INT_STS_RXDF_INT_) {
1126                         SMC_ACK_INT(INT_STS_RXDF_INT_);
1127                 }
1128
1129                 /* Rx Data FIFO exceeds set level */
1130                 if (status & INT_STS_RDFL_) {
1131                         if (IS_REV_A(lp->revision)) {
1132                                 rx_overrun=1;
1133                                 SMC_GET_MAC_CR(cr);
1134                                 cr &= ~MAC_CR_RXEN_;
1135                                 SMC_SET_MAC_CR(cr);
1136                                 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1137                                 dev->stats.rx_errors++;
1138                                 dev->stats.rx_fifo_errors++;
1139                         }
1140                         SMC_ACK_INT(INT_STS_RDFL_);
1141                 }
1142                 if (status & INT_STS_RDFO_) {
1143                         if (!IS_REV_A(lp->revision)) {
1144                                 SMC_GET_MAC_CR(cr);
1145                                 cr &= ~MAC_CR_RXEN_;
1146                                 SMC_SET_MAC_CR(cr);
1147                                 rx_overrun=1;
1148                                 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1149                                 dev->stats.rx_errors++;
1150                                 dev->stats.rx_fifo_errors++;
1151                         }
1152                         SMC_ACK_INT(INT_STS_RDFO_);
1153                 }
1154                 /* Handle receive condition */
1155                 if ((status & INT_STS_RSFL_) || rx_overrun) {
1156                         unsigned int fifo;
1157                         DBG(SMC_DEBUG_RX, "%s: RX irq\n", dev->name);
1158                         fifo = SMC_GET_RX_FIFO_INF();
1159                         pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1160                         DBG(SMC_DEBUG_RX, "%s: Rx FIFO pkts %d, bytes %d\n",
1161                                 dev->name, pkts, fifo & 0xFFFF );
1162                         if (pkts != 0) {
1163 #ifdef SMC_USE_DMA
1164                                 unsigned int fifo;
1165                                 if (lp->rxdma_active){
1166                                         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1167                                                 "%s: RX DMA active\n", dev->name);
1168                                         /* The DMA is already running so up the IRQ threshold */
1169                                         fifo = SMC_GET_FIFO_INT() & ~0xFF;
1170                                         fifo |= pkts & 0xFF;
1171                                         DBG(SMC_DEBUG_RX,
1172                                                 "%s: Setting RX stat FIFO threshold to %d\n",
1173                                                 dev->name, fifo & 0xff);
1174                                         SMC_SET_FIFO_INT(fifo);
1175                                 } else
1176 #endif
1177                                 smc911x_rcv(dev);
1178                         }
1179                         SMC_ACK_INT(INT_STS_RSFL_);
1180                 }
1181                 /* Handle transmit FIFO available */
1182                 if (status & INT_STS_TDFA_) {
1183                         DBG(SMC_DEBUG_TX, "%s: TX data FIFO space available irq\n", dev->name);
1184                         SMC_SET_FIFO_TDA(0xFF);
1185                         lp->tx_throttle = 0;
1186 #ifdef SMC_USE_DMA
1187                         if (!lp->txdma_active)
1188 #endif
1189                                 netif_wake_queue(dev);
1190                         SMC_ACK_INT(INT_STS_TDFA_);
1191                 }
1192                 /* Handle transmit done condition */
1193 #if 1
1194                 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1195                         DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC,
1196                                 "%s: Tx stat FIFO limit (%d) /GPT irq\n",
1197                                 dev->name, (SMC_GET_FIFO_INT() & 0x00ff0000) >> 16);
1198                         smc911x_tx(dev);
1199                         SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
1200                         SMC_ACK_INT(INT_STS_TSFL_);
1201                         SMC_ACK_INT(INT_STS_TSFL_ | INT_STS_GPT_INT_);
1202                 }
1203 #else
1204                 if (status & INT_STS_TSFL_) {
1205                         DBG(SMC_DEBUG_TX, "%s: TX status FIFO limit (%d) irq \n", dev->name, );
1206                         smc911x_tx(dev);
1207                         SMC_ACK_INT(INT_STS_TSFL_);
1208                 }
1209
1210                 if (status & INT_STS_GPT_INT_) {
1211                         DBG(SMC_DEBUG_RX, "%s: IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1212                                 dev->name,
1213                                 SMC_GET_IRQ_CFG(),
1214                                 SMC_GET_FIFO_INT(),
1215                                 SMC_GET_RX_CFG());
1216                         DBG(SMC_DEBUG_RX, "%s: Rx Stat FIFO Used 0x%02x "
1217                                 "Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1218                                 dev->name,
1219                                 (SMC_GET_RX_FIFO_INF() & 0x00ff0000) >> 16,
1220                                 SMC_GET_RX_FIFO_INF() & 0xffff,
1221                                 SMC_GET_RX_STS_FIFO_PEEK());
1222                         SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
1223                         SMC_ACK_INT(INT_STS_GPT_INT_);
1224                 }
1225 #endif
1226
1227                 /* Handle PHY interrupt condition */
1228                 if (status & INT_STS_PHY_INT_) {
1229                         DBG(SMC_DEBUG_MISC, "%s: PHY irq\n", dev->name);
1230                         smc911x_phy_interrupt(dev);
1231                         SMC_ACK_INT(INT_STS_PHY_INT_);
1232                 }
1233         } while (--timeout);
1234
1235         /* restore mask state */
1236         SMC_SET_INT_EN(mask);
1237
1238         DBG(SMC_DEBUG_MISC, "%s: Interrupt done (%d loops)\n",
1239                 dev->name, 8-timeout);
1240
1241         spin_unlock_irqrestore(&lp->lock, flags);
1242
1243         DBG(3, "%s: Interrupt done (%d loops)\n", dev->name, 8-timeout);
1244
1245         return IRQ_HANDLED;
1246 }
1247
1248 #ifdef SMC_USE_DMA
1249 static void
1250 smc911x_tx_dma_irq(int dma, void *data)
1251 {
1252         struct net_device *dev = (struct net_device *)data;
1253         struct smc911x_local *lp = netdev_priv(dev);
1254         struct sk_buff *skb = lp->current_tx_skb;
1255         unsigned long flags;
1256
1257         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1258
1259         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: TX DMA irq handler\n", dev->name);
1260         /* Clear the DMA interrupt sources */
1261         SMC_DMA_ACK_IRQ(dev, dma);
1262         BUG_ON(skb == NULL);
1263         dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1264         dev->trans_start = jiffies;
1265         dev_kfree_skb_irq(skb);
1266         lp->current_tx_skb = NULL;
1267         if (lp->pending_tx_skb != NULL)
1268                 smc911x_hardware_send_pkt(dev);
1269         else {
1270                 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1271                         "%s: No pending Tx packets. DMA disabled\n", dev->name);
1272                 spin_lock_irqsave(&lp->lock, flags);
1273                 lp->txdma_active = 0;
1274                 if (!lp->tx_throttle) {
1275                         netif_wake_queue(dev);
1276                 }
1277                 spin_unlock_irqrestore(&lp->lock, flags);
1278         }
1279
1280         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1281                 "%s: TX DMA irq completed\n", dev->name);
1282 }
1283 static void
1284 smc911x_rx_dma_irq(int dma, void *data)
1285 {
1286         struct net_device *dev = (struct net_device *)data;
1287         unsigned long ioaddr = dev->base_addr;
1288         struct smc911x_local *lp = netdev_priv(dev);
1289         struct sk_buff *skb = lp->current_rx_skb;
1290         unsigned long flags;
1291         unsigned int pkts;
1292
1293         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1294         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, "%s: RX DMA irq handler\n", dev->name);
1295         /* Clear the DMA interrupt sources */
1296         SMC_DMA_ACK_IRQ(dev, dma);
1297         dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1298         BUG_ON(skb == NULL);
1299         lp->current_rx_skb = NULL;
1300         PRINT_PKT(skb->data, skb->len);
1301         dev->last_rx = jiffies;
1302         skb->protocol = eth_type_trans(skb, dev);
1303         dev->stats.rx_packets++;
1304         dev->stats.rx_bytes += skb->len;
1305         netif_rx(skb);
1306
1307         spin_lock_irqsave(&lp->lock, flags);
1308         pkts = (SMC_GET_RX_FIFO_INF() & RX_FIFO_INF_RXSUSED_) >> 16;
1309         if (pkts != 0) {
1310                 smc911x_rcv(dev);
1311         }else {
1312                 lp->rxdma_active = 0;
1313         }
1314         spin_unlock_irqrestore(&lp->lock, flags);
1315         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1316                 "%s: RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1317                 dev->name, pkts);
1318 }
1319 #endif   /* SMC_USE_DMA */
1320
1321 #ifdef CONFIG_NET_POLL_CONTROLLER
1322 /*
1323  * Polling receive - used by netconsole and other diagnostic tools
1324  * to allow network i/o with interrupts disabled.
1325  */
1326 static void smc911x_poll_controller(struct net_device *dev)
1327 {
1328         disable_irq(dev->irq);
1329         smc911x_interrupt(dev->irq, dev);
1330         enable_irq(dev->irq);
1331 }
1332 #endif
1333
1334 /* Our watchdog timed out. Called by the networking layer */
1335 static void smc911x_timeout(struct net_device *dev)
1336 {
1337         struct smc911x_local *lp = netdev_priv(dev);
1338         unsigned long ioaddr = dev->base_addr;
1339         int status, mask;
1340         unsigned long flags;
1341
1342         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1343
1344         spin_lock_irqsave(&lp->lock, flags);
1345         status = SMC_GET_INT();
1346         mask = SMC_GET_INT_EN();
1347         spin_unlock_irqrestore(&lp->lock, flags);
1348         DBG(SMC_DEBUG_MISC, "%s: INT 0x%02x MASK 0x%02x \n",
1349                 dev->name, status, mask);
1350
1351         /* Dump the current TX FIFO contents and restart */
1352         mask = SMC_GET_TX_CFG();
1353         SMC_SET_TX_CFG(mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1354         /*
1355          * Reconfiguring the PHY doesn't seem like a bad idea here, but
1356          * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1357          * which calls schedule().       Hence we use a work queue.
1358          */
1359         if (lp->phy_type != 0) {
1360                 if (schedule_work(&lp->phy_configure)) {
1361                         lp->work_pending = 1;
1362                 }
1363         }
1364
1365         /* We can accept TX packets again */
1366         dev->trans_start = jiffies;
1367         netif_wake_queue(dev);
1368 }
1369
1370 /*
1371  * This routine will, depending on the values passed to it,
1372  * either make it accept multicast packets, go into
1373  * promiscuous mode (for TCPDUMP and cousins) or accept
1374  * a select set of multicast packets
1375  */
1376 static void smc911x_set_multicast_list(struct net_device *dev)
1377 {
1378         struct smc911x_local *lp = netdev_priv(dev);
1379         unsigned long ioaddr = dev->base_addr;
1380         unsigned int multicast_table[2];
1381         unsigned int mcr, update_multicast = 0;
1382         unsigned long flags;
1383
1384         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1385
1386         spin_lock_irqsave(&lp->lock, flags);
1387         SMC_GET_MAC_CR(mcr);
1388         spin_unlock_irqrestore(&lp->lock, flags);
1389
1390         if (dev->flags & IFF_PROMISC) {
1391
1392                 DBG(SMC_DEBUG_MISC, "%s: RCR_PRMS\n", dev->name);
1393                 mcr |= MAC_CR_PRMS_;
1394         }
1395         /*
1396          * Here, I am setting this to accept all multicast packets.
1397          * I don't need to zero the multicast table, because the flag is
1398          * checked before the table is
1399          */
1400         else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) {
1401                 DBG(SMC_DEBUG_MISC, "%s: RCR_ALMUL\n", dev->name);
1402                 mcr |= MAC_CR_MCPAS_;
1403         }
1404
1405         /*
1406          * This sets the internal hardware table to filter out unwanted
1407          * multicast packets before they take up memory.
1408          *
1409          * The SMC chip uses a hash table where the high 6 bits of the CRC of
1410          * address are the offset into the table.       If that bit is 1, then the
1411          * multicast packet is accepted.  Otherwise, it's dropped silently.
1412          *
1413          * To use the 6 bits as an offset into the table, the high 1 bit is
1414          * the number of the 32 bit register, while the low 5 bits are the bit
1415          * within that register.
1416          */
1417         else if (dev->mc_count)  {
1418                 int i;
1419                 struct dev_mc_list *cur_addr;
1420
1421                 /* Set the Hash perfec mode */
1422                 mcr |= MAC_CR_HPFILT_;
1423
1424                 /* start with a table of all zeros: reject all */
1425                 memset(multicast_table, 0, sizeof(multicast_table));
1426
1427                 cur_addr = dev->mc_list;
1428                 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
1429                         u32 position;
1430
1431                         /* do we have a pointer here? */
1432                         if (!cur_addr)
1433                                 break;
1434                         /* make sure this is a multicast address -
1435                                 shouldn't this be a given if we have it here ? */
1436                         if (!(*cur_addr->dmi_addr & 1))
1437                                  continue;
1438
1439                         /* upper 6 bits are used as hash index */
1440                         position = ether_crc(ETH_ALEN, cur_addr->dmi_addr)>>26;
1441
1442                         multicast_table[position>>5] |= 1 << (position&0x1f);
1443                 }
1444
1445                 /* be sure I get rid of flags I might have set */
1446                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1447
1448                 /* now, the table can be loaded into the chipset */
1449                 update_multicast = 1;
1450         } else   {
1451                 DBG(SMC_DEBUG_MISC, "%s: ~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n",
1452                         dev->name);
1453                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1454
1455                 /*
1456                  * since I'm disabling all multicast entirely, I need to
1457                  * clear the multicast list
1458                  */
1459                 memset(multicast_table, 0, sizeof(multicast_table));
1460                 update_multicast = 1;
1461         }
1462
1463         spin_lock_irqsave(&lp->lock, flags);
1464         SMC_SET_MAC_CR(mcr);
1465         if (update_multicast) {
1466                 DBG(SMC_DEBUG_MISC,
1467                         "%s: update mcast hash table 0x%08x 0x%08x\n",
1468                         dev->name, multicast_table[0], multicast_table[1]);
1469                 SMC_SET_HASHL(multicast_table[0]);
1470                 SMC_SET_HASHH(multicast_table[1]);
1471         }
1472         spin_unlock_irqrestore(&lp->lock, flags);
1473 }
1474
1475
1476 /*
1477  * Open and Initialize the board
1478  *
1479  * Set up everything, reset the card, etc..
1480  */
1481 static int
1482 smc911x_open(struct net_device *dev)
1483 {
1484         struct smc911x_local *lp = netdev_priv(dev);
1485
1486         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1487
1488         /*
1489          * Check that the address is valid.  If its not, refuse
1490          * to bring the device up.       The user must specify an
1491          * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1492          */
1493         if (!is_valid_ether_addr(dev->dev_addr)) {
1494                 PRINTK("%s: no valid ethernet hw addr\n", __FUNCTION__);
1495                 return -EINVAL;
1496         }
1497
1498         /* reset the hardware */
1499         smc911x_reset(dev);
1500
1501         /* Configure the PHY, initialize the link state */
1502         smc911x_phy_configure(&lp->phy_configure);
1503
1504         /* Turn on Tx + Rx */
1505         smc911x_enable(dev);
1506
1507         netif_start_queue(dev);
1508
1509         return 0;
1510 }
1511
1512 /*
1513  * smc911x_close
1514  *
1515  * this makes the board clean up everything that it can
1516  * and not talk to the outside world.    Caused by
1517  * an 'ifconfig ethX down'
1518  */
1519 static int smc911x_close(struct net_device *dev)
1520 {
1521         struct smc911x_local *lp = netdev_priv(dev);
1522
1523         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1524
1525         netif_stop_queue(dev);
1526         netif_carrier_off(dev);
1527
1528         /* clear everything */
1529         smc911x_shutdown(dev);
1530
1531         if (lp->phy_type != 0) {
1532                 /* We need to ensure that no calls to
1533                  * smc911x_phy_configure are pending.
1534
1535                  * flush_scheduled_work() cannot be called because we
1536                  * are running with the netlink semaphore held (from
1537                  * devinet_ioctl()) and the pending work queue
1538                  * contains linkwatch_event() (scheduled by
1539                  * netif_carrier_off() above). linkwatch_event() also
1540                  * wants the netlink semaphore.
1541                  */
1542                 while (lp->work_pending)
1543                         schedule();
1544                 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1545         }
1546
1547         if (lp->pending_tx_skb) {
1548                 dev_kfree_skb(lp->pending_tx_skb);
1549                 lp->pending_tx_skb = NULL;
1550         }
1551
1552         return 0;
1553 }
1554
1555 /*
1556  * Ethtool support
1557  */
1558 static int
1559 smc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1560 {
1561         struct smc911x_local *lp = netdev_priv(dev);
1562         unsigned long ioaddr = dev->base_addr;
1563         int ret, status;
1564         unsigned long flags;
1565
1566         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1567         cmd->maxtxpkt = 1;
1568         cmd->maxrxpkt = 1;
1569
1570         if (lp->phy_type != 0) {
1571                 spin_lock_irqsave(&lp->lock, flags);
1572                 ret = mii_ethtool_gset(&lp->mii, cmd);
1573                 spin_unlock_irqrestore(&lp->lock, flags);
1574         } else {
1575                 cmd->supported = SUPPORTED_10baseT_Half |
1576                                 SUPPORTED_10baseT_Full |
1577                                 SUPPORTED_TP | SUPPORTED_AUI;
1578
1579                 if (lp->ctl_rspeed == 10)
1580                         cmd->speed = SPEED_10;
1581                 else if (lp->ctl_rspeed == 100)
1582                         cmd->speed = SPEED_100;
1583
1584                 cmd->autoneg = AUTONEG_DISABLE;
1585                 if (lp->mii.phy_id==1)
1586                         cmd->transceiver = XCVR_INTERNAL;
1587                 else
1588                         cmd->transceiver = XCVR_EXTERNAL;
1589                 cmd->port = 0;
1590                 SMC_GET_PHY_SPECIAL(lp->mii.phy_id, status);
1591                 cmd->duplex =
1592                         (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1593                                 DUPLEX_FULL : DUPLEX_HALF;
1594                 ret = 0;
1595         }
1596
1597         return ret;
1598 }
1599
1600 static int
1601 smc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1602 {
1603         struct smc911x_local *lp = netdev_priv(dev);
1604         int ret;
1605         unsigned long flags;
1606
1607         if (lp->phy_type != 0) {
1608                 spin_lock_irqsave(&lp->lock, flags);
1609                 ret = mii_ethtool_sset(&lp->mii, cmd);
1610                 spin_unlock_irqrestore(&lp->lock, flags);
1611         } else {
1612                 if (cmd->autoneg != AUTONEG_DISABLE ||
1613                         cmd->speed != SPEED_10 ||
1614                         (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1615                         (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1616                         return -EINVAL;
1617
1618                 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1619
1620                 ret = 0;
1621         }
1622
1623         return ret;
1624 }
1625
1626 static void
1627 smc911x_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1628 {
1629         strncpy(info->driver, CARDNAME, sizeof(info->driver));
1630         strncpy(info->version, version, sizeof(info->version));
1631         strncpy(info->bus_info, dev->dev.parent->bus_id, sizeof(info->bus_info));
1632 }
1633
1634 static int smc911x_ethtool_nwayreset(struct net_device *dev)
1635 {
1636         struct smc911x_local *lp = netdev_priv(dev);
1637         int ret = -EINVAL;
1638         unsigned long flags;
1639
1640         if (lp->phy_type != 0) {
1641                 spin_lock_irqsave(&lp->lock, flags);
1642                 ret = mii_nway_restart(&lp->mii);
1643                 spin_unlock_irqrestore(&lp->lock, flags);
1644         }
1645
1646         return ret;
1647 }
1648
1649 static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1650 {
1651         struct smc911x_local *lp = netdev_priv(dev);
1652         return lp->msg_enable;
1653 }
1654
1655 static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1656 {
1657         struct smc911x_local *lp = netdev_priv(dev);
1658         lp->msg_enable = level;
1659 }
1660
1661 static int smc911x_ethtool_getregslen(struct net_device *dev)
1662 {
1663         /* System regs + MAC regs + PHY regs */
1664         return (((E2P_CMD - ID_REV)/4 + 1) +
1665                         (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1666 }
1667
1668 static void smc911x_ethtool_getregs(struct net_device *dev,
1669                                                                                  struct ethtool_regs* regs, void *buf)
1670 {
1671         unsigned long ioaddr = dev->base_addr;
1672         struct smc911x_local *lp = netdev_priv(dev);
1673         unsigned long flags;
1674         u32 reg,i,j=0;
1675         u32 *data = (u32*)buf;
1676
1677         regs->version = lp->version;
1678         for(i=ID_REV;i<=E2P_CMD;i+=4) {
1679                 data[j++] = SMC_inl(ioaddr,i);
1680         }
1681         for(i=MAC_CR;i<=WUCSR;i++) {
1682                 spin_lock_irqsave(&lp->lock, flags);
1683                 SMC_GET_MAC_CSR(i, reg);
1684                 spin_unlock_irqrestore(&lp->lock, flags);
1685                 data[j++] = reg;
1686         }
1687         for(i=0;i<=31;i++) {
1688                 spin_lock_irqsave(&lp->lock, flags);
1689                 SMC_GET_MII(i, lp->mii.phy_id, reg);
1690                 spin_unlock_irqrestore(&lp->lock, flags);
1691                 data[j++] = reg & 0xFFFF;
1692         }
1693 }
1694
1695 static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1696 {
1697         unsigned long ioaddr = dev->base_addr;
1698         unsigned int timeout;
1699         int e2p_cmd;
1700
1701         e2p_cmd = SMC_GET_E2P_CMD();
1702         for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1703                 if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1704                         PRINTK("%s: %s timeout waiting for EEPROM to respond\n",
1705                                 dev->name, __FUNCTION__);
1706                         return -EFAULT;
1707                 }
1708                 mdelay(1);
1709                 e2p_cmd = SMC_GET_E2P_CMD();
1710         }
1711         if (timeout == 0) {
1712                 PRINTK("%s: %s timeout waiting for EEPROM CMD not busy\n",
1713                         dev->name, __FUNCTION__);
1714                 return -ETIMEDOUT;
1715         }
1716         return 0;
1717 }
1718
1719 static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1720                                                                                                         int cmd, int addr)
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         SMC_SET_E2P_CMD(E2P_CMD_EPC_BUSY_ |
1728                 ((cmd) & (0x7<<28)) |
1729                 ((addr) & 0xFF));
1730         return 0;
1731 }
1732
1733 static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1734                                                                                                         u8 *data)
1735 {
1736         unsigned long ioaddr = dev->base_addr;
1737         int ret;
1738
1739         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1740                 return ret;
1741         *data = SMC_GET_E2P_DATA();
1742         return 0;
1743 }
1744
1745 static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1746                                                                                                          u8 data)
1747 {
1748         unsigned long ioaddr = dev->base_addr;
1749         int ret;
1750
1751         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1752                 return ret;
1753         SMC_SET_E2P_DATA(data);
1754         return 0;
1755 }
1756
1757 static int smc911x_ethtool_geteeprom(struct net_device *dev,
1758                                                                           struct ethtool_eeprom *eeprom, u8 *data)
1759 {
1760         u8 eebuf[SMC911X_EEPROM_LEN];
1761         int i, ret;
1762
1763         for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1764                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1765                         return ret;
1766                 if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1767                         return ret;
1768                 }
1769         memcpy(data, eebuf+eeprom->offset, eeprom->len);
1770         return 0;
1771 }
1772
1773 static int smc911x_ethtool_seteeprom(struct net_device *dev,
1774                                                                            struct ethtool_eeprom *eeprom, u8 *data)
1775 {
1776         int i, ret;
1777
1778         /* Enable erase */
1779         if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1780                 return ret;
1781         for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1782                 /* erase byte */
1783                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1784                         return ret;
1785                 /* write byte */
1786                 if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1787                          return ret;
1788                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1789                         return ret;
1790                 }
1791          return 0;
1792 }
1793
1794 static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1795 {
1796          return SMC911X_EEPROM_LEN;
1797 }
1798
1799 static const struct ethtool_ops smc911x_ethtool_ops = {
1800         .get_settings    = smc911x_ethtool_getsettings,
1801         .set_settings    = smc911x_ethtool_setsettings,
1802         .get_drvinfo     = smc911x_ethtool_getdrvinfo,
1803         .get_msglevel    = smc911x_ethtool_getmsglevel,
1804         .set_msglevel    = smc911x_ethtool_setmsglevel,
1805         .nway_reset = smc911x_ethtool_nwayreset,
1806         .get_link        = ethtool_op_get_link,
1807         .get_regs_len    = smc911x_ethtool_getregslen,
1808         .get_regs        = smc911x_ethtool_getregs,
1809         .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1810         .get_eeprom = smc911x_ethtool_geteeprom,
1811         .set_eeprom = smc911x_ethtool_seteeprom,
1812 };
1813
1814 /*
1815  * smc911x_findirq
1816  *
1817  * This routine has a simple purpose -- make the SMC chip generate an
1818  * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1819  */
1820 static int __init smc911x_findirq(unsigned long ioaddr)
1821 {
1822         int timeout = 20;
1823         unsigned long cookie;
1824
1825         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
1826
1827         cookie = probe_irq_on();
1828
1829         /*
1830          * Force a SW interrupt
1831          */
1832
1833         SMC_SET_INT_EN(INT_EN_SW_INT_EN_);
1834
1835         /*
1836          * Wait until positive that the interrupt has been generated
1837          */
1838         do {
1839                 int int_status;
1840                 udelay(10);
1841                 int_status = SMC_GET_INT_EN();
1842                 if (int_status & INT_EN_SW_INT_EN_)
1843                          break;         /* got the interrupt */
1844         } while (--timeout);
1845
1846         /*
1847          * there is really nothing that I can do here if timeout fails,
1848          * as autoirq_report will return a 0 anyway, which is what I
1849          * want in this case.    Plus, the clean up is needed in both
1850          * cases.
1851          */
1852
1853         /* and disable all interrupts again */
1854         SMC_SET_INT_EN(0);
1855
1856         /* and return what I found */
1857         return probe_irq_off(cookie);
1858 }
1859
1860 /*
1861  * Function: smc911x_probe(unsigned long ioaddr)
1862  *
1863  * Purpose:
1864  *       Tests to see if a given ioaddr points to an SMC911x chip.
1865  *       Returns a 0 on success
1866  *
1867  * Algorithm:
1868  *       (1) see if the endian word is OK
1869  *       (1) see if I recognize the chip ID in the appropriate register
1870  *
1871  * Here I do typical initialization tasks.
1872  *
1873  * o  Initialize the structure if needed
1874  * o  print out my vanity message if not done so already
1875  * o  print out what type of hardware is detected
1876  * o  print out the ethernet address
1877  * o  find the IRQ
1878  * o  set up my private data
1879  * o  configure the dev structure with my subroutines
1880  * o  actually GRAB the irq.
1881  * o  GRAB the region
1882  */
1883 static int __init smc911x_probe(struct net_device *dev, unsigned long ioaddr)
1884 {
1885         struct smc911x_local *lp = netdev_priv(dev);
1886         int i, retval;
1887         unsigned int val, chip_id, revision;
1888         const char *version_string;
1889
1890         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1891
1892         /* First, see if the endian word is recognized */
1893         val = SMC_GET_BYTE_TEST();
1894         DBG(SMC_DEBUG_MISC, "%s: endian probe returned 0x%04x\n", CARDNAME, val);
1895         if (val != 0x87654321) {
1896                 printk(KERN_ERR "Invalid chip endian 0x08%x\n",val);
1897                 retval = -ENODEV;
1898                 goto err_out;
1899         }
1900
1901         /*
1902          * check if the revision register is something that I
1903          * recognize.   These might need to be added to later,
1904          * as future revisions could be added.
1905          */
1906         chip_id = SMC_GET_PN();
1907         DBG(SMC_DEBUG_MISC, "%s: id probe returned 0x%04x\n", CARDNAME, chip_id);
1908         for(i=0;chip_ids[i].id != 0; i++) {
1909                 if (chip_ids[i].id == chip_id) break;
1910         }
1911         if (!chip_ids[i].id) {
1912                 printk(KERN_ERR "Unknown chip ID %04x\n", chip_id);
1913                 retval = -ENODEV;
1914                 goto err_out;
1915         }
1916         version_string = chip_ids[i].name;
1917
1918         revision = SMC_GET_REV();
1919         DBG(SMC_DEBUG_MISC, "%s: revision = 0x%04x\n", CARDNAME, revision);
1920
1921         /* At this point I'll assume that the chip is an SMC911x. */
1922         DBG(SMC_DEBUG_MISC, "%s: Found a %s\n", CARDNAME, chip_ids[i].name);
1923
1924         /* Validate the TX FIFO size requested */
1925         if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1926                 printk(KERN_ERR "Invalid TX FIFO size requested %d\n", tx_fifo_kb);
1927                 retval = -EINVAL;
1928                 goto err_out;
1929         }
1930
1931         /* fill in some of the fields */
1932         dev->base_addr = ioaddr;
1933         lp->version = chip_ids[i].id;
1934         lp->revision = revision;
1935         lp->tx_fifo_kb = tx_fifo_kb;
1936         /* Reverse calculate the RX FIFO size from the TX */
1937         lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1938         lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1939
1940         /* Set the automatic flow control values */
1941         switch(lp->tx_fifo_kb) {
1942                 /*
1943                  *       AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1944                  *       AFC_LO is AFC_HI/2
1945                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1946                  */
1947                 case 2:/* 13440 Rx Data Fifo Size */
1948                         lp->afc_cfg=0x008C46AF;break;
1949                 case 3:/* 12480 Rx Data Fifo Size */
1950                         lp->afc_cfg=0x0082419F;break;
1951                 case 4:/* 11520 Rx Data Fifo Size */
1952                         lp->afc_cfg=0x00783C9F;break;
1953                 case 5:/* 10560 Rx Data Fifo Size */
1954                         lp->afc_cfg=0x006E374F;break;
1955                 case 6:/* 9600 Rx Data Fifo Size */
1956                         lp->afc_cfg=0x0064328F;break;
1957                 case 7:/* 8640 Rx Data Fifo Size */
1958                         lp->afc_cfg=0x005A2D7F;break;
1959                 case 8:/* 7680 Rx Data Fifo Size */
1960                         lp->afc_cfg=0x0050287F;break;
1961                 case 9:/* 6720 Rx Data Fifo Size */
1962                         lp->afc_cfg=0x0046236F;break;
1963                 case 10:/* 5760 Rx Data Fifo Size */
1964                         lp->afc_cfg=0x003C1E6F;break;
1965                 case 11:/* 4800 Rx Data Fifo Size */
1966                         lp->afc_cfg=0x0032195F;break;
1967                 /*
1968                  *       AFC_HI is ~1520 bytes less than RX Data Fifo Size
1969                  *       AFC_LO is AFC_HI/2
1970                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1971                  */
1972                 case 12:/* 3840 Rx Data Fifo Size */
1973                         lp->afc_cfg=0x0024124F;break;
1974                 case 13:/* 2880 Rx Data Fifo Size */
1975                         lp->afc_cfg=0x0015073F;break;
1976                 case 14:/* 1920 Rx Data Fifo Size */
1977                         lp->afc_cfg=0x0006032F;break;
1978                  default:
1979                          PRINTK("%s: ERROR -- no AFC_CFG setting found",
1980                                 dev->name);
1981                          break;
1982         }
1983
1984         DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX,
1985                 "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1986                 lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1987
1988         spin_lock_init(&lp->lock);
1989
1990         /* Get the MAC address */
1991         SMC_GET_MAC_ADDR(dev->dev_addr);
1992
1993         /* now, reset the chip, and put it into a known state */
1994         smc911x_reset(dev);
1995
1996         /*
1997          * If dev->irq is 0, then the device has to be banged on to see
1998          * what the IRQ is.
1999          *
2000          * Specifying an IRQ is done with the assumption that the user knows
2001          * what (s)he is doing.  No checking is done!!!!
2002          */
2003         if (dev->irq < 1) {
2004                 int trials;
2005
2006                 trials = 3;
2007                 while (trials--) {
2008                         dev->irq = smc911x_findirq(ioaddr);
2009                         if (dev->irq)
2010                                 break;
2011                         /* kick the card and try again */
2012                         smc911x_reset(dev);
2013                 }
2014         }
2015         if (dev->irq == 0) {
2016                 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
2017                         dev->name);
2018                 retval = -ENODEV;
2019                 goto err_out;
2020         }
2021         dev->irq = irq_canonicalize(dev->irq);
2022
2023         /* Fill in the fields of the device structure with ethernet values. */
2024         ether_setup(dev);
2025
2026         dev->open = smc911x_open;
2027         dev->stop = smc911x_close;
2028         dev->hard_start_xmit = smc911x_hard_start_xmit;
2029         dev->tx_timeout = smc911x_timeout;
2030         dev->watchdog_timeo = msecs_to_jiffies(watchdog);
2031         dev->set_multicast_list = smc911x_set_multicast_list;
2032         dev->ethtool_ops = &smc911x_ethtool_ops;
2033 #ifdef CONFIG_NET_POLL_CONTROLLER
2034         dev->poll_controller = smc911x_poll_controller;
2035 #endif
2036
2037         INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
2038         lp->mii.phy_id_mask = 0x1f;
2039         lp->mii.reg_num_mask = 0x1f;
2040         lp->mii.force_media = 0;
2041         lp->mii.full_duplex = 0;
2042         lp->mii.dev = dev;
2043         lp->mii.mdio_read = smc911x_phy_read;
2044         lp->mii.mdio_write = smc911x_phy_write;
2045
2046         /*
2047          * Locate the phy, if any.
2048          */
2049         smc911x_phy_detect(dev);
2050
2051         /* Set default parameters */
2052         lp->msg_enable = NETIF_MSG_LINK;
2053         lp->ctl_rfduplx = 1;
2054         lp->ctl_rspeed = 100;
2055
2056         /* Grab the IRQ */
2057         retval = request_irq(dev->irq, &smc911x_interrupt,
2058                         IRQF_SHARED | SMC_IRQ_SENSE, dev->name, dev);
2059         if (retval)
2060                 goto err_out;
2061
2062 #ifdef SMC_USE_DMA
2063         lp->rxdma = SMC_DMA_REQUEST(dev, smc911x_rx_dma_irq);
2064         lp->txdma = SMC_DMA_REQUEST(dev, smc911x_tx_dma_irq);
2065         lp->rxdma_active = 0;
2066         lp->txdma_active = 0;
2067         dev->dma = lp->rxdma;
2068 #endif
2069
2070         retval = register_netdev(dev);
2071         if (retval == 0) {
2072                 /* now, print out the card info, in a short format.. */
2073                 printk("%s: %s (rev %d) at %#lx IRQ %d",
2074                         dev->name, version_string, lp->revision,
2075                         dev->base_addr, dev->irq);
2076
2077 #ifdef SMC_USE_DMA
2078                 if (lp->rxdma != -1)
2079                         printk(" RXDMA %d ", lp->rxdma);
2080
2081                 if (lp->txdma != -1)
2082                         printk("TXDMA %d", lp->txdma);
2083 #endif
2084                 printk("\n");
2085                 if (!is_valid_ether_addr(dev->dev_addr)) {
2086                         printk("%s: Invalid ethernet MAC address. Please "
2087                                         "set using ifconfig\n", dev->name);
2088                 } else {
2089                         /* Print the Ethernet address */
2090                         printk("%s: Ethernet addr: ", dev->name);
2091                         for (i = 0; i < 5; i++)
2092                                 printk("%2.2x:", dev->dev_addr[i]);
2093                         printk("%2.2x\n", dev->dev_addr[5]);
2094                 }
2095
2096                 if (lp->phy_type == 0) {
2097                         PRINTK("%s: No PHY found\n", dev->name);
2098                 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2099                         PRINTK("%s: LAN911x Internal PHY\n", dev->name);
2100                 } else {
2101                         PRINTK("%s: External PHY 0x%08x\n", dev->name, lp->phy_type);
2102                 }
2103         }
2104
2105 err_out:
2106 #ifdef SMC_USE_DMA
2107         if (retval) {
2108                 if (lp->rxdma != -1) {
2109                         SMC_DMA_FREE(dev, lp->rxdma);
2110                 }
2111                 if (lp->txdma != -1) {
2112                         SMC_DMA_FREE(dev, lp->txdma);
2113                 }
2114         }
2115 #endif
2116         return retval;
2117 }
2118
2119 /*
2120  * smc911x_init(void)
2121  *
2122  *        Output:
2123  *       0 --> there is a device
2124  *       anything else, error
2125  */
2126 static int smc911x_drv_probe(struct platform_device *pdev)
2127 {
2128         struct net_device *ndev;
2129         struct resource *res;
2130         struct smc911x_local *lp;
2131         unsigned int *addr;
2132         int ret;
2133
2134         DBG(SMC_DEBUG_FUNC, "--> %s\n",  __FUNCTION__);
2135         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2136         if (!res) {
2137                 ret = -ENODEV;
2138                 goto out;
2139         }
2140
2141         /*
2142          * Request the regions.
2143          */
2144         if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2145                  ret = -EBUSY;
2146                  goto out;
2147         }
2148
2149         ndev = alloc_etherdev(sizeof(struct smc911x_local));
2150         if (!ndev) {
2151                 printk("%s: could not allocate device.\n", CARDNAME);
2152                 ret = -ENOMEM;
2153                 goto release_1;
2154         }
2155         SET_NETDEV_DEV(ndev, &pdev->dev);
2156
2157         ndev->dma = (unsigned char)-1;
2158         ndev->irq = platform_get_irq(pdev, 0);
2159         lp = netdev_priv(ndev);
2160         lp->netdev = ndev;
2161
2162         addr = ioremap(res->start, SMC911X_IO_EXTENT);
2163         if (!addr) {
2164                 ret = -ENOMEM;
2165                 goto release_both;
2166         }
2167
2168         platform_set_drvdata(pdev, ndev);
2169         ret = smc911x_probe(ndev, (unsigned long)addr);
2170         if (ret != 0) {
2171                 platform_set_drvdata(pdev, NULL);
2172                 iounmap(addr);
2173 release_both:
2174                 free_netdev(ndev);
2175 release_1:
2176                 release_mem_region(res->start, SMC911X_IO_EXTENT);
2177 out:
2178                 printk("%s: not found (%d).\n", CARDNAME, ret);
2179         }
2180 #ifdef SMC_USE_DMA
2181         else {
2182                 lp->physaddr = res->start;
2183                 lp->dev = &pdev->dev;
2184         }
2185 #endif
2186
2187         return ret;
2188 }
2189
2190 static int smc911x_drv_remove(struct platform_device *pdev)
2191 {
2192         struct net_device *ndev = platform_get_drvdata(pdev);
2193         struct resource *res;
2194
2195         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2196         platform_set_drvdata(pdev, NULL);
2197
2198         unregister_netdev(ndev);
2199
2200         free_irq(ndev->irq, ndev);
2201
2202 #ifdef SMC_USE_DMA
2203         {
2204                 struct smc911x_local *lp = netdev_priv(ndev);
2205                 if (lp->rxdma != -1) {
2206                         SMC_DMA_FREE(dev, lp->rxdma);
2207                 }
2208                 if (lp->txdma != -1) {
2209                         SMC_DMA_FREE(dev, lp->txdma);
2210                 }
2211         }
2212 #endif
2213         iounmap((void *)ndev->base_addr);
2214         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2215         release_mem_region(res->start, SMC911X_IO_EXTENT);
2216
2217         free_netdev(ndev);
2218         return 0;
2219 }
2220
2221 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2222 {
2223         struct net_device *ndev = platform_get_drvdata(dev);
2224         unsigned long ioaddr = ndev->base_addr;
2225
2226         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2227         if (ndev) {
2228                 if (netif_running(ndev)) {
2229                         netif_device_detach(ndev);
2230                         smc911x_shutdown(ndev);
2231 #if POWER_DOWN
2232                         /* Set D2 - Energy detect only setting */
2233                         SMC_SET_PMT_CTRL(2<<12);
2234 #endif
2235                 }
2236         }
2237         return 0;
2238 }
2239
2240 static int smc911x_drv_resume(struct platform_device *dev)
2241 {
2242         struct net_device *ndev = platform_get_drvdata(dev);
2243
2244         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2245         if (ndev) {
2246                 struct smc911x_local *lp = netdev_priv(ndev);
2247
2248                 if (netif_running(ndev)) {
2249                         smc911x_reset(ndev);
2250                         smc911x_enable(ndev);
2251                         if (lp->phy_type != 0)
2252                                 smc911x_phy_configure(&lp->phy_configure);
2253                         netif_device_attach(ndev);
2254                 }
2255         }
2256         return 0;
2257 }
2258
2259 static struct platform_driver smc911x_driver = {
2260         .probe           = smc911x_drv_probe,
2261         .remove  = smc911x_drv_remove,
2262         .suspend         = smc911x_drv_suspend,
2263         .resume  = smc911x_drv_resume,
2264         .driver  = {
2265                 .name    = CARDNAME,
2266                 .owner  = THIS_MODULE,
2267         },
2268 };
2269
2270 static int __init smc911x_init(void)
2271 {
2272         return platform_driver_register(&smc911x_driver);
2273 }
2274
2275 static void __exit smc911x_cleanup(void)
2276 {
2277         platform_driver_unregister(&smc911x_driver);
2278 }
2279
2280 module_init(smc911x_init);
2281 module_exit(smc911x_cleanup);