76cc1d3adf715fc635a58db2c2b9df40789f7a56
[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
96 /*
97  * The internal workings of the driver.  If you are changing anything
98  * here with the SMC stuff, you should have the datasheet and know
99  * what you are doing.
100  */
101 #define CARDNAME "smc911x"
102
103 /*
104  * Use power-down feature of the chip
105  */
106 #define POWER_DOWN               1
107
108
109 /* store this information for the driver.. */
110 struct smc911x_local {
111         /*
112          * If I have to wait until the DMA is finished and ready to reload a
113          * packet, I will store the skbuff here. Then, the DMA will send it
114          * out and free it.
115          */
116         struct sk_buff *pending_tx_skb;
117
118         /* version/revision of the SMC911x chip */
119         u16 version;
120         u16 revision;
121
122         /* FIFO sizes */
123         int tx_fifo_kb;
124         int tx_fifo_size;
125         int rx_fifo_size;
126         int afc_cfg;
127
128         /* Contains the current active receive/phy mode */
129         int ctl_rfduplx;
130         int ctl_rspeed;
131
132         u32 msg_enable;
133         u32 phy_type;
134         struct mii_if_info mii;
135
136         /* work queue */
137         struct work_struct phy_configure;
138         int work_pending;
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                  goto smc911x_phy_configure_exit_nolock;
963
964         if (smc911x_phy_reset(dev, phyaddr)) {
965                 printk("%s: PHY reset timed out\n", dev->name);
966                 goto smc911x_phy_configure_exit_nolock;
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 smc911x_phy_configure_exit_nolock:
1036         lp->work_pending = 0;
1037 }
1038
1039 /*
1040  * smc911x_phy_interrupt
1041  *
1042  * Purpose:  Handle interrupts relating to PHY register 18. This is
1043  *       called from the "hard" interrupt handler under our private spinlock.
1044  */
1045 static void smc911x_phy_interrupt(struct net_device *dev)
1046 {
1047         struct smc911x_local *lp = netdev_priv(dev);
1048         unsigned long ioaddr = dev->base_addr;
1049         int phyaddr = lp->mii.phy_id;
1050         int status;
1051
1052         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1053
1054         if (lp->phy_type == 0)
1055                 return;
1056
1057         smc911x_phy_check_media(dev, 0);
1058         /* read to clear status bits */
1059         SMC_GET_PHY_INT_SRC(phyaddr,status);
1060         DBG(SMC_DEBUG_MISC, "%s: PHY interrupt status 0x%04x\n",
1061                 dev->name, status & 0xffff);
1062         DBG(SMC_DEBUG_MISC, "%s: AFC_CFG 0x%08x\n",
1063                 dev->name, SMC_GET_AFC_CFG());
1064 }
1065
1066 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1067
1068 /*
1069  * This is the main routine of the driver, to handle the device when
1070  * it needs some attention.
1071  */
1072 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1073 {
1074         struct net_device *dev = dev_id;
1075         unsigned long ioaddr = dev->base_addr;
1076         struct smc911x_local *lp = netdev_priv(dev);
1077         unsigned int status, mask, timeout;
1078         unsigned int rx_overrun=0, cr, pkts;
1079         unsigned long flags;
1080
1081         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1082
1083         spin_lock_irqsave(&lp->lock, flags);
1084
1085         /* Spurious interrupt check */
1086         if ((SMC_GET_IRQ_CFG() & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1087                 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1088                 spin_unlock_irqrestore(&lp->lock, flags);
1089                 return IRQ_NONE;
1090         }
1091
1092         mask = SMC_GET_INT_EN();
1093         SMC_SET_INT_EN(0);
1094
1095         /* set a timeout value, so I don't stay here forever */
1096         timeout = 8;
1097
1098
1099         do {
1100                 status = SMC_GET_INT();
1101
1102                 DBG(SMC_DEBUG_MISC, "%s: INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1103                         dev->name, status, mask, status & ~mask);
1104
1105                 status &= mask;
1106                 if (!status)
1107                         break;
1108
1109                 /* Handle SW interrupt condition */
1110                 if (status & INT_STS_SW_INT_) {
1111                         SMC_ACK_INT(INT_STS_SW_INT_);
1112                         mask &= ~INT_EN_SW_INT_EN_;
1113                 }
1114                 /* Handle various error conditions */
1115                 if (status & INT_STS_RXE_) {
1116                         SMC_ACK_INT(INT_STS_RXE_);
1117                         dev->stats.rx_errors++;
1118                 }
1119                 if (status & INT_STS_RXDFH_INT_) {
1120                         SMC_ACK_INT(INT_STS_RXDFH_INT_);
1121                         dev->stats.rx_dropped+=SMC_GET_RX_DROP();
1122                  }
1123                 /* Undocumented interrupt-what is the right thing to do here? */
1124                 if (status & INT_STS_RXDF_INT_) {
1125                         SMC_ACK_INT(INT_STS_RXDF_INT_);
1126                 }
1127
1128                 /* Rx Data FIFO exceeds set level */
1129                 if (status & INT_STS_RDFL_) {
1130                         if (IS_REV_A(lp->revision)) {
1131                                 rx_overrun=1;
1132                                 SMC_GET_MAC_CR(cr);
1133                                 cr &= ~MAC_CR_RXEN_;
1134                                 SMC_SET_MAC_CR(cr);
1135                                 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1136                                 dev->stats.rx_errors++;
1137                                 dev->stats.rx_fifo_errors++;
1138                         }
1139                         SMC_ACK_INT(INT_STS_RDFL_);
1140                 }
1141                 if (status & INT_STS_RDFO_) {
1142                         if (!IS_REV_A(lp->revision)) {
1143                                 SMC_GET_MAC_CR(cr);
1144                                 cr &= ~MAC_CR_RXEN_;
1145                                 SMC_SET_MAC_CR(cr);
1146                                 rx_overrun=1;
1147                                 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1148                                 dev->stats.rx_errors++;
1149                                 dev->stats.rx_fifo_errors++;
1150                         }
1151                         SMC_ACK_INT(INT_STS_RDFO_);
1152                 }
1153                 /* Handle receive condition */
1154                 if ((status & INT_STS_RSFL_) || rx_overrun) {
1155                         unsigned int fifo;
1156                         DBG(SMC_DEBUG_RX, "%s: RX irq\n", dev->name);
1157                         fifo = SMC_GET_RX_FIFO_INF();
1158                         pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1159                         DBG(SMC_DEBUG_RX, "%s: Rx FIFO pkts %d, bytes %d\n",
1160                                 dev->name, pkts, fifo & 0xFFFF );
1161                         if (pkts != 0) {
1162 #ifdef SMC_USE_DMA
1163                                 unsigned int fifo;
1164                                 if (lp->rxdma_active){
1165                                         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1166                                                 "%s: RX DMA active\n", dev->name);
1167                                         /* The DMA is already running so up the IRQ threshold */
1168                                         fifo = SMC_GET_FIFO_INT() & ~0xFF;
1169                                         fifo |= pkts & 0xFF;
1170                                         DBG(SMC_DEBUG_RX,
1171                                                 "%s: Setting RX stat FIFO threshold to %d\n",
1172                                                 dev->name, fifo & 0xff);
1173                                         SMC_SET_FIFO_INT(fifo);
1174                                 } else
1175 #endif
1176                                 smc911x_rcv(dev);
1177                         }
1178                         SMC_ACK_INT(INT_STS_RSFL_);
1179                 }
1180                 /* Handle transmit FIFO available */
1181                 if (status & INT_STS_TDFA_) {
1182                         DBG(SMC_DEBUG_TX, "%s: TX data FIFO space available irq\n", dev->name);
1183                         SMC_SET_FIFO_TDA(0xFF);
1184                         lp->tx_throttle = 0;
1185 #ifdef SMC_USE_DMA
1186                         if (!lp->txdma_active)
1187 #endif
1188                                 netif_wake_queue(dev);
1189                         SMC_ACK_INT(INT_STS_TDFA_);
1190                 }
1191                 /* Handle transmit done condition */
1192 #if 1
1193                 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1194                         DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC,
1195                                 "%s: Tx stat FIFO limit (%d) /GPT irq\n",
1196                                 dev->name, (SMC_GET_FIFO_INT() & 0x00ff0000) >> 16);
1197                         smc911x_tx(dev);
1198                         SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
1199                         SMC_ACK_INT(INT_STS_TSFL_);
1200                         SMC_ACK_INT(INT_STS_TSFL_ | INT_STS_GPT_INT_);
1201                 }
1202 #else
1203                 if (status & INT_STS_TSFL_) {
1204                         DBG(SMC_DEBUG_TX, "%s: TX status FIFO limit (%d) irq \n", dev->name, );
1205                         smc911x_tx(dev);
1206                         SMC_ACK_INT(INT_STS_TSFL_);
1207                 }
1208
1209                 if (status & INT_STS_GPT_INT_) {
1210                         DBG(SMC_DEBUG_RX, "%s: IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1211                                 dev->name,
1212                                 SMC_GET_IRQ_CFG(),
1213                                 SMC_GET_FIFO_INT(),
1214                                 SMC_GET_RX_CFG());
1215                         DBG(SMC_DEBUG_RX, "%s: Rx Stat FIFO Used 0x%02x "
1216                                 "Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1217                                 dev->name,
1218                                 (SMC_GET_RX_FIFO_INF() & 0x00ff0000) >> 16,
1219                                 SMC_GET_RX_FIFO_INF() & 0xffff,
1220                                 SMC_GET_RX_STS_FIFO_PEEK());
1221                         SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
1222                         SMC_ACK_INT(INT_STS_GPT_INT_);
1223                 }
1224 #endif
1225
1226                 /* Handle PHY interrupt condition */
1227                 if (status & INT_STS_PHY_INT_) {
1228                         DBG(SMC_DEBUG_MISC, "%s: PHY irq\n", dev->name);
1229                         smc911x_phy_interrupt(dev);
1230                         SMC_ACK_INT(INT_STS_PHY_INT_);
1231                 }
1232         } while (--timeout);
1233
1234         /* restore mask state */
1235         SMC_SET_INT_EN(mask);
1236
1237         DBG(SMC_DEBUG_MISC, "%s: Interrupt done (%d loops)\n",
1238                 dev->name, 8-timeout);
1239
1240         spin_unlock_irqrestore(&lp->lock, flags);
1241
1242         DBG(3, "%s: Interrupt done (%d loops)\n", dev->name, 8-timeout);
1243
1244         return IRQ_HANDLED;
1245 }
1246
1247 #ifdef SMC_USE_DMA
1248 static void
1249 smc911x_tx_dma_irq(int dma, void *data)
1250 {
1251         struct net_device *dev = (struct net_device *)data;
1252         struct smc911x_local *lp = netdev_priv(dev);
1253         struct sk_buff *skb = lp->current_tx_skb;
1254         unsigned long flags;
1255
1256         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1257
1258         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: TX DMA irq handler\n", dev->name);
1259         /* Clear the DMA interrupt sources */
1260         SMC_DMA_ACK_IRQ(dev, dma);
1261         BUG_ON(skb == NULL);
1262         dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1263         dev->trans_start = jiffies;
1264         dev_kfree_skb_irq(skb);
1265         lp->current_tx_skb = NULL;
1266         if (lp->pending_tx_skb != NULL)
1267                 smc911x_hardware_send_pkt(dev);
1268         else {
1269                 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1270                         "%s: No pending Tx packets. DMA disabled\n", dev->name);
1271                 spin_lock_irqsave(&lp->lock, flags);
1272                 lp->txdma_active = 0;
1273                 if (!lp->tx_throttle) {
1274                         netif_wake_queue(dev);
1275                 }
1276                 spin_unlock_irqrestore(&lp->lock, flags);
1277         }
1278
1279         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1280                 "%s: TX DMA irq completed\n", dev->name);
1281 }
1282 static void
1283 smc911x_rx_dma_irq(int dma, void *data)
1284 {
1285         struct net_device *dev = (struct net_device *)data;
1286         unsigned long ioaddr = dev->base_addr;
1287         struct smc911x_local *lp = netdev_priv(dev);
1288         struct sk_buff *skb = lp->current_rx_skb;
1289         unsigned long flags;
1290         unsigned int pkts;
1291
1292         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1293         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, "%s: RX DMA irq handler\n", dev->name);
1294         /* Clear the DMA interrupt sources */
1295         SMC_DMA_ACK_IRQ(dev, dma);
1296         dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1297         BUG_ON(skb == NULL);
1298         lp->current_rx_skb = NULL;
1299         PRINT_PKT(skb->data, skb->len);
1300         dev->last_rx = jiffies;
1301         skb->protocol = eth_type_trans(skb, dev);
1302         dev->stats.rx_packets++;
1303         dev->stats.rx_bytes += skb->len;
1304         netif_rx(skb);
1305
1306         spin_lock_irqsave(&lp->lock, flags);
1307         pkts = (SMC_GET_RX_FIFO_INF() & RX_FIFO_INF_RXSUSED_) >> 16;
1308         if (pkts != 0) {
1309                 smc911x_rcv(dev);
1310         }else {
1311                 lp->rxdma_active = 0;
1312         }
1313         spin_unlock_irqrestore(&lp->lock, flags);
1314         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1315                 "%s: RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1316                 dev->name, pkts);
1317 }
1318 #endif   /* SMC_USE_DMA */
1319
1320 #ifdef CONFIG_NET_POLL_CONTROLLER
1321 /*
1322  * Polling receive - used by netconsole and other diagnostic tools
1323  * to allow network i/o with interrupts disabled.
1324  */
1325 static void smc911x_poll_controller(struct net_device *dev)
1326 {
1327         disable_irq(dev->irq);
1328         smc911x_interrupt(dev->irq, dev);
1329         enable_irq(dev->irq);
1330 }
1331 #endif
1332
1333 /* Our watchdog timed out. Called by the networking layer */
1334 static void smc911x_timeout(struct net_device *dev)
1335 {
1336         struct smc911x_local *lp = netdev_priv(dev);
1337         unsigned long ioaddr = dev->base_addr;
1338         int status, mask;
1339         unsigned long flags;
1340
1341         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1342
1343         spin_lock_irqsave(&lp->lock, flags);
1344         status = SMC_GET_INT();
1345         mask = SMC_GET_INT_EN();
1346         spin_unlock_irqrestore(&lp->lock, flags);
1347         DBG(SMC_DEBUG_MISC, "%s: INT 0x%02x MASK 0x%02x \n",
1348                 dev->name, status, mask);
1349
1350         /* Dump the current TX FIFO contents and restart */
1351         mask = SMC_GET_TX_CFG();
1352         SMC_SET_TX_CFG(mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1353         /*
1354          * Reconfiguring the PHY doesn't seem like a bad idea here, but
1355          * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1356          * which calls schedule().       Hence we use a work queue.
1357          */
1358         if (lp->phy_type != 0) {
1359                 if (schedule_work(&lp->phy_configure)) {
1360                         lp->work_pending = 1;
1361                 }
1362         }
1363
1364         /* We can accept TX packets again */
1365         dev->trans_start = jiffies;
1366         netif_wake_queue(dev);
1367 }
1368
1369 /*
1370  * This routine will, depending on the values passed to it,
1371  * either make it accept multicast packets, go into
1372  * promiscuous mode (for TCPDUMP and cousins) or accept
1373  * a select set of multicast packets
1374  */
1375 static void smc911x_set_multicast_list(struct net_device *dev)
1376 {
1377         struct smc911x_local *lp = netdev_priv(dev);
1378         unsigned long ioaddr = dev->base_addr;
1379         unsigned int multicast_table[2];
1380         unsigned int mcr, update_multicast = 0;
1381         unsigned long flags;
1382
1383         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1384
1385         spin_lock_irqsave(&lp->lock, flags);
1386         SMC_GET_MAC_CR(mcr);
1387         spin_unlock_irqrestore(&lp->lock, flags);
1388
1389         if (dev->flags & IFF_PROMISC) {
1390
1391                 DBG(SMC_DEBUG_MISC, "%s: RCR_PRMS\n", dev->name);
1392                 mcr |= MAC_CR_PRMS_;
1393         }
1394         /*
1395          * Here, I am setting this to accept all multicast packets.
1396          * I don't need to zero the multicast table, because the flag is
1397          * checked before the table is
1398          */
1399         else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) {
1400                 DBG(SMC_DEBUG_MISC, "%s: RCR_ALMUL\n", dev->name);
1401                 mcr |= MAC_CR_MCPAS_;
1402         }
1403
1404         /*
1405          * This sets the internal hardware table to filter out unwanted
1406          * multicast packets before they take up memory.
1407          *
1408          * The SMC chip uses a hash table where the high 6 bits of the CRC of
1409          * address are the offset into the table.       If that bit is 1, then the
1410          * multicast packet is accepted.  Otherwise, it's dropped silently.
1411          *
1412          * To use the 6 bits as an offset into the table, the high 1 bit is
1413          * the number of the 32 bit register, while the low 5 bits are the bit
1414          * within that register.
1415          */
1416         else if (dev->mc_count)  {
1417                 int i;
1418                 struct dev_mc_list *cur_addr;
1419
1420                 /* Set the Hash perfec mode */
1421                 mcr |= MAC_CR_HPFILT_;
1422
1423                 /* start with a table of all zeros: reject all */
1424                 memset(multicast_table, 0, sizeof(multicast_table));
1425
1426                 cur_addr = dev->mc_list;
1427                 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
1428                         u32 position;
1429
1430                         /* do we have a pointer here? */
1431                         if (!cur_addr)
1432                                 break;
1433                         /* make sure this is a multicast address -
1434                                 shouldn't this be a given if we have it here ? */
1435                         if (!(*cur_addr->dmi_addr & 1))
1436                                  continue;
1437
1438                         /* upper 6 bits are used as hash index */
1439                         position = ether_crc(ETH_ALEN, cur_addr->dmi_addr)>>26;
1440
1441                         multicast_table[position>>5] |= 1 << (position&0x1f);
1442                 }
1443
1444                 /* be sure I get rid of flags I might have set */
1445                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1446
1447                 /* now, the table can be loaded into the chipset */
1448                 update_multicast = 1;
1449         } else   {
1450                 DBG(SMC_DEBUG_MISC, "%s: ~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n",
1451                         dev->name);
1452                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1453
1454                 /*
1455                  * since I'm disabling all multicast entirely, I need to
1456                  * clear the multicast list
1457                  */
1458                 memset(multicast_table, 0, sizeof(multicast_table));
1459                 update_multicast = 1;
1460         }
1461
1462         spin_lock_irqsave(&lp->lock, flags);
1463         SMC_SET_MAC_CR(mcr);
1464         if (update_multicast) {
1465                 DBG(SMC_DEBUG_MISC,
1466                         "%s: update mcast hash table 0x%08x 0x%08x\n",
1467                         dev->name, multicast_table[0], multicast_table[1]);
1468                 SMC_SET_HASHL(multicast_table[0]);
1469                 SMC_SET_HASHH(multicast_table[1]);
1470         }
1471         spin_unlock_irqrestore(&lp->lock, flags);
1472 }
1473
1474
1475 /*
1476  * Open and Initialize the board
1477  *
1478  * Set up everything, reset the card, etc..
1479  */
1480 static int
1481 smc911x_open(struct net_device *dev)
1482 {
1483         struct smc911x_local *lp = netdev_priv(dev);
1484
1485         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1486
1487         /*
1488          * Check that the address is valid.  If its not, refuse
1489          * to bring the device up.       The user must specify an
1490          * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1491          */
1492         if (!is_valid_ether_addr(dev->dev_addr)) {
1493                 PRINTK("%s: no valid ethernet hw addr\n", __FUNCTION__);
1494                 return -EINVAL;
1495         }
1496
1497         /* reset the hardware */
1498         smc911x_reset(dev);
1499
1500         /* Configure the PHY, initialize the link state */
1501         smc911x_phy_configure(&lp->phy_configure);
1502
1503         /* Turn on Tx + Rx */
1504         smc911x_enable(dev);
1505
1506         netif_start_queue(dev);
1507
1508         return 0;
1509 }
1510
1511 /*
1512  * smc911x_close
1513  *
1514  * this makes the board clean up everything that it can
1515  * and not talk to the outside world.    Caused by
1516  * an 'ifconfig ethX down'
1517  */
1518 static int smc911x_close(struct net_device *dev)
1519 {
1520         struct smc911x_local *lp = netdev_priv(dev);
1521
1522         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1523
1524         netif_stop_queue(dev);
1525         netif_carrier_off(dev);
1526
1527         /* clear everything */
1528         smc911x_shutdown(dev);
1529
1530         if (lp->phy_type != 0) {
1531                 /* We need to ensure that no calls to
1532                  * smc911x_phy_configure are pending.
1533
1534                  * flush_scheduled_work() cannot be called because we
1535                  * are running with the netlink semaphore held (from
1536                  * devinet_ioctl()) and the pending work queue
1537                  * contains linkwatch_event() (scheduled by
1538                  * netif_carrier_off() above). linkwatch_event() also
1539                  * wants the netlink semaphore.
1540                  */
1541                 while (lp->work_pending)
1542                         schedule();
1543                 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1544         }
1545
1546         if (lp->pending_tx_skb) {
1547                 dev_kfree_skb(lp->pending_tx_skb);
1548                 lp->pending_tx_skb = NULL;
1549         }
1550
1551         return 0;
1552 }
1553
1554 /*
1555  * Ethtool support
1556  */
1557 static int
1558 smc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1559 {
1560         struct smc911x_local *lp = netdev_priv(dev);
1561         unsigned long ioaddr = dev->base_addr;
1562         int ret, status;
1563         unsigned long flags;
1564
1565         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1566         cmd->maxtxpkt = 1;
1567         cmd->maxrxpkt = 1;
1568
1569         if (lp->phy_type != 0) {
1570                 spin_lock_irqsave(&lp->lock, flags);
1571                 ret = mii_ethtool_gset(&lp->mii, cmd);
1572                 spin_unlock_irqrestore(&lp->lock, flags);
1573         } else {
1574                 cmd->supported = SUPPORTED_10baseT_Half |
1575                                 SUPPORTED_10baseT_Full |
1576                                 SUPPORTED_TP | SUPPORTED_AUI;
1577
1578                 if (lp->ctl_rspeed == 10)
1579                         cmd->speed = SPEED_10;
1580                 else if (lp->ctl_rspeed == 100)
1581                         cmd->speed = SPEED_100;
1582
1583                 cmd->autoneg = AUTONEG_DISABLE;
1584                 if (lp->mii.phy_id==1)
1585                         cmd->transceiver = XCVR_INTERNAL;
1586                 else
1587                         cmd->transceiver = XCVR_EXTERNAL;
1588                 cmd->port = 0;
1589                 SMC_GET_PHY_SPECIAL(lp->mii.phy_id, status);
1590                 cmd->duplex =
1591                         (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1592                                 DUPLEX_FULL : DUPLEX_HALF;
1593                 ret = 0;
1594         }
1595
1596         return ret;
1597 }
1598
1599 static int
1600 smc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1601 {
1602         struct smc911x_local *lp = netdev_priv(dev);
1603         int ret;
1604         unsigned long flags;
1605
1606         if (lp->phy_type != 0) {
1607                 spin_lock_irqsave(&lp->lock, flags);
1608                 ret = mii_ethtool_sset(&lp->mii, cmd);
1609                 spin_unlock_irqrestore(&lp->lock, flags);
1610         } else {
1611                 if (cmd->autoneg != AUTONEG_DISABLE ||
1612                         cmd->speed != SPEED_10 ||
1613                         (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1614                         (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1615                         return -EINVAL;
1616
1617                 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1618
1619                 ret = 0;
1620         }
1621
1622         return ret;
1623 }
1624
1625 static void
1626 smc911x_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1627 {
1628         strncpy(info->driver, CARDNAME, sizeof(info->driver));
1629         strncpy(info->version, version, sizeof(info->version));
1630         strncpy(info->bus_info, dev->dev.parent->bus_id, sizeof(info->bus_info));
1631 }
1632
1633 static int smc911x_ethtool_nwayreset(struct net_device *dev)
1634 {
1635         struct smc911x_local *lp = netdev_priv(dev);
1636         int ret = -EINVAL;
1637         unsigned long flags;
1638
1639         if (lp->phy_type != 0) {
1640                 spin_lock_irqsave(&lp->lock, flags);
1641                 ret = mii_nway_restart(&lp->mii);
1642                 spin_unlock_irqrestore(&lp->lock, flags);
1643         }
1644
1645         return ret;
1646 }
1647
1648 static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1649 {
1650         struct smc911x_local *lp = netdev_priv(dev);
1651         return lp->msg_enable;
1652 }
1653
1654 static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1655 {
1656         struct smc911x_local *lp = netdev_priv(dev);
1657         lp->msg_enable = level;
1658 }
1659
1660 static int smc911x_ethtool_getregslen(struct net_device *dev)
1661 {
1662         /* System regs + MAC regs + PHY regs */
1663         return (((E2P_CMD - ID_REV)/4 + 1) +
1664                         (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1665 }
1666
1667 static void smc911x_ethtool_getregs(struct net_device *dev,
1668                                                                                  struct ethtool_regs* regs, void *buf)
1669 {
1670         unsigned long ioaddr = dev->base_addr;
1671         struct smc911x_local *lp = netdev_priv(dev);
1672         unsigned long flags;
1673         u32 reg,i,j=0;
1674         u32 *data = (u32*)buf;
1675
1676         regs->version = lp->version;
1677         for(i=ID_REV;i<=E2P_CMD;i+=4) {
1678                 data[j++] = SMC_inl(ioaddr,i);
1679         }
1680         for(i=MAC_CR;i<=WUCSR;i++) {
1681                 spin_lock_irqsave(&lp->lock, flags);
1682                 SMC_GET_MAC_CSR(i, reg);
1683                 spin_unlock_irqrestore(&lp->lock, flags);
1684                 data[j++] = reg;
1685         }
1686         for(i=0;i<=31;i++) {
1687                 spin_lock_irqsave(&lp->lock, flags);
1688                 SMC_GET_MII(i, lp->mii.phy_id, reg);
1689                 spin_unlock_irqrestore(&lp->lock, flags);
1690                 data[j++] = reg & 0xFFFF;
1691         }
1692 }
1693
1694 static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1695 {
1696         unsigned long ioaddr = dev->base_addr;
1697         unsigned int timeout;
1698         int e2p_cmd;
1699
1700         e2p_cmd = SMC_GET_E2P_CMD();
1701         for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1702                 if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1703                         PRINTK("%s: %s timeout waiting for EEPROM to respond\n",
1704                                 dev->name, __FUNCTION__);
1705                         return -EFAULT;
1706                 }
1707                 mdelay(1);
1708                 e2p_cmd = SMC_GET_E2P_CMD();
1709         }
1710         if (timeout == 0) {
1711                 PRINTK("%s: %s timeout waiting for EEPROM CMD not busy\n",
1712                         dev->name, __FUNCTION__);
1713                 return -ETIMEDOUT;
1714         }
1715         return 0;
1716 }
1717
1718 static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1719                                                                                                         int cmd, int addr)
1720 {
1721         unsigned long ioaddr = dev->base_addr;
1722         int ret;
1723
1724         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1725                 return ret;
1726         SMC_SET_E2P_CMD(E2P_CMD_EPC_BUSY_ |
1727                 ((cmd) & (0x7<<28)) |
1728                 ((addr) & 0xFF));
1729         return 0;
1730 }
1731
1732 static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1733                                                                                                         u8 *data)
1734 {
1735         unsigned long ioaddr = dev->base_addr;
1736         int ret;
1737
1738         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1739                 return ret;
1740         *data = SMC_GET_E2P_DATA();
1741         return 0;
1742 }
1743
1744 static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1745                                                                                                          u8 data)
1746 {
1747         unsigned long ioaddr = dev->base_addr;
1748         int ret;
1749
1750         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1751                 return ret;
1752         SMC_SET_E2P_DATA(data);
1753         return 0;
1754 }
1755
1756 static int smc911x_ethtool_geteeprom(struct net_device *dev,
1757                                                                           struct ethtool_eeprom *eeprom, u8 *data)
1758 {
1759         u8 eebuf[SMC911X_EEPROM_LEN];
1760         int i, ret;
1761
1762         for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1763                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1764                         return ret;
1765                 if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1766                         return ret;
1767                 }
1768         memcpy(data, eebuf+eeprom->offset, eeprom->len);
1769         return 0;
1770 }
1771
1772 static int smc911x_ethtool_seteeprom(struct net_device *dev,
1773                                                                            struct ethtool_eeprom *eeprom, u8 *data)
1774 {
1775         int i, ret;
1776
1777         /* Enable erase */
1778         if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1779                 return ret;
1780         for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1781                 /* erase byte */
1782                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1783                         return ret;
1784                 /* write byte */
1785                 if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1786                          return ret;
1787                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1788                         return ret;
1789                 }
1790          return 0;
1791 }
1792
1793 static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1794 {
1795          return SMC911X_EEPROM_LEN;
1796 }
1797
1798 static const struct ethtool_ops smc911x_ethtool_ops = {
1799         .get_settings    = smc911x_ethtool_getsettings,
1800         .set_settings    = smc911x_ethtool_setsettings,
1801         .get_drvinfo     = smc911x_ethtool_getdrvinfo,
1802         .get_msglevel    = smc911x_ethtool_getmsglevel,
1803         .set_msglevel    = smc911x_ethtool_setmsglevel,
1804         .nway_reset = smc911x_ethtool_nwayreset,
1805         .get_link        = ethtool_op_get_link,
1806         .get_regs_len    = smc911x_ethtool_getregslen,
1807         .get_regs        = smc911x_ethtool_getregs,
1808         .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1809         .get_eeprom = smc911x_ethtool_geteeprom,
1810         .set_eeprom = smc911x_ethtool_seteeprom,
1811 };
1812
1813 /*
1814  * smc911x_findirq
1815  *
1816  * This routine has a simple purpose -- make the SMC chip generate an
1817  * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1818  */
1819 static int __init smc911x_findirq(unsigned long ioaddr)
1820 {
1821         int timeout = 20;
1822         unsigned long cookie;
1823
1824         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
1825
1826         cookie = probe_irq_on();
1827
1828         /*
1829          * Force a SW interrupt
1830          */
1831
1832         SMC_SET_INT_EN(INT_EN_SW_INT_EN_);
1833
1834         /*
1835          * Wait until positive that the interrupt has been generated
1836          */
1837         do {
1838                 int int_status;
1839                 udelay(10);
1840                 int_status = SMC_GET_INT_EN();
1841                 if (int_status & INT_EN_SW_INT_EN_)
1842                          break;         /* got the interrupt */
1843         } while (--timeout);
1844
1845         /*
1846          * there is really nothing that I can do here if timeout fails,
1847          * as autoirq_report will return a 0 anyway, which is what I
1848          * want in this case.    Plus, the clean up is needed in both
1849          * cases.
1850          */
1851
1852         /* and disable all interrupts again */
1853         SMC_SET_INT_EN(0);
1854
1855         /* and return what I found */
1856         return probe_irq_off(cookie);
1857 }
1858
1859 /*
1860  * Function: smc911x_probe(unsigned long ioaddr)
1861  *
1862  * Purpose:
1863  *       Tests to see if a given ioaddr points to an SMC911x chip.
1864  *       Returns a 0 on success
1865  *
1866  * Algorithm:
1867  *       (1) see if the endian word is OK
1868  *       (1) see if I recognize the chip ID in the appropriate register
1869  *
1870  * Here I do typical initialization tasks.
1871  *
1872  * o  Initialize the structure if needed
1873  * o  print out my vanity message if not done so already
1874  * o  print out what type of hardware is detected
1875  * o  print out the ethernet address
1876  * o  find the IRQ
1877  * o  set up my private data
1878  * o  configure the dev structure with my subroutines
1879  * o  actually GRAB the irq.
1880  * o  GRAB the region
1881  */
1882 static int __init smc911x_probe(struct net_device *dev, unsigned long ioaddr)
1883 {
1884         struct smc911x_local *lp = netdev_priv(dev);
1885         int i, retval;
1886         unsigned int val, chip_id, revision;
1887         const char *version_string;
1888
1889         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1890
1891         /* First, see if the endian word is recognized */
1892         val = SMC_GET_BYTE_TEST();
1893         DBG(SMC_DEBUG_MISC, "%s: endian probe returned 0x%04x\n", CARDNAME, val);
1894         if (val != 0x87654321) {
1895                 printk(KERN_ERR "Invalid chip endian 0x08%x\n",val);
1896                 retval = -ENODEV;
1897                 goto err_out;
1898         }
1899
1900         /*
1901          * check if the revision register is something that I
1902          * recognize.   These might need to be added to later,
1903          * as future revisions could be added.
1904          */
1905         chip_id = SMC_GET_PN();
1906         DBG(SMC_DEBUG_MISC, "%s: id probe returned 0x%04x\n", CARDNAME, chip_id);
1907         for(i=0;chip_ids[i].id != 0; i++) {
1908                 if (chip_ids[i].id == chip_id) break;
1909         }
1910         if (!chip_ids[i].id) {
1911                 printk(KERN_ERR "Unknown chip ID %04x\n", chip_id);
1912                 retval = -ENODEV;
1913                 goto err_out;
1914         }
1915         version_string = chip_ids[i].name;
1916
1917         revision = SMC_GET_REV();
1918         DBG(SMC_DEBUG_MISC, "%s: revision = 0x%04x\n", CARDNAME, revision);
1919
1920         /* At this point I'll assume that the chip is an SMC911x. */
1921         DBG(SMC_DEBUG_MISC, "%s: Found a %s\n", CARDNAME, chip_ids[i].name);
1922
1923         /* Validate the TX FIFO size requested */
1924         if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1925                 printk(KERN_ERR "Invalid TX FIFO size requested %d\n", tx_fifo_kb);
1926                 retval = -EINVAL;
1927                 goto err_out;
1928         }
1929
1930         /* fill in some of the fields */
1931         dev->base_addr = ioaddr;
1932         lp->version = chip_ids[i].id;
1933         lp->revision = revision;
1934         lp->tx_fifo_kb = tx_fifo_kb;
1935         /* Reverse calculate the RX FIFO size from the TX */
1936         lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1937         lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1938
1939         /* Set the automatic flow control values */
1940         switch(lp->tx_fifo_kb) {
1941                 /*
1942                  *       AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1943                  *       AFC_LO is AFC_HI/2
1944                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1945                  */
1946                 case 2:/* 13440 Rx Data Fifo Size */
1947                         lp->afc_cfg=0x008C46AF;break;
1948                 case 3:/* 12480 Rx Data Fifo Size */
1949                         lp->afc_cfg=0x0082419F;break;
1950                 case 4:/* 11520 Rx Data Fifo Size */
1951                         lp->afc_cfg=0x00783C9F;break;
1952                 case 5:/* 10560 Rx Data Fifo Size */
1953                         lp->afc_cfg=0x006E374F;break;
1954                 case 6:/* 9600 Rx Data Fifo Size */
1955                         lp->afc_cfg=0x0064328F;break;
1956                 case 7:/* 8640 Rx Data Fifo Size */
1957                         lp->afc_cfg=0x005A2D7F;break;
1958                 case 8:/* 7680 Rx Data Fifo Size */
1959                         lp->afc_cfg=0x0050287F;break;
1960                 case 9:/* 6720 Rx Data Fifo Size */
1961                         lp->afc_cfg=0x0046236F;break;
1962                 case 10:/* 5760 Rx Data Fifo Size */
1963                         lp->afc_cfg=0x003C1E6F;break;
1964                 case 11:/* 4800 Rx Data Fifo Size */
1965                         lp->afc_cfg=0x0032195F;break;
1966                 /*
1967                  *       AFC_HI is ~1520 bytes less than RX Data Fifo Size
1968                  *       AFC_LO is AFC_HI/2
1969                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1970                  */
1971                 case 12:/* 3840 Rx Data Fifo Size */
1972                         lp->afc_cfg=0x0024124F;break;
1973                 case 13:/* 2880 Rx Data Fifo Size */
1974                         lp->afc_cfg=0x0015073F;break;
1975                 case 14:/* 1920 Rx Data Fifo Size */
1976                         lp->afc_cfg=0x0006032F;break;
1977                  default:
1978                          PRINTK("%s: ERROR -- no AFC_CFG setting found",
1979                                 dev->name);
1980                          break;
1981         }
1982
1983         DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX,
1984                 "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1985                 lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1986
1987         spin_lock_init(&lp->lock);
1988
1989         /* Get the MAC address */
1990         SMC_GET_MAC_ADDR(dev->dev_addr);
1991
1992         /* now, reset the chip, and put it into a known state */
1993         smc911x_reset(dev);
1994
1995         /*
1996          * If dev->irq is 0, then the device has to be banged on to see
1997          * what the IRQ is.
1998          *
1999          * Specifying an IRQ is done with the assumption that the user knows
2000          * what (s)he is doing.  No checking is done!!!!
2001          */
2002         if (dev->irq < 1) {
2003                 int trials;
2004
2005                 trials = 3;
2006                 while (trials--) {
2007                         dev->irq = smc911x_findirq(ioaddr);
2008                         if (dev->irq)
2009                                 break;
2010                         /* kick the card and try again */
2011                         smc911x_reset(dev);
2012                 }
2013         }
2014         if (dev->irq == 0) {
2015                 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
2016                         dev->name);
2017                 retval = -ENODEV;
2018                 goto err_out;
2019         }
2020         dev->irq = irq_canonicalize(dev->irq);
2021
2022         /* Fill in the fields of the device structure with ethernet values. */
2023         ether_setup(dev);
2024
2025         dev->open = smc911x_open;
2026         dev->stop = smc911x_close;
2027         dev->hard_start_xmit = smc911x_hard_start_xmit;
2028         dev->tx_timeout = smc911x_timeout;
2029         dev->watchdog_timeo = msecs_to_jiffies(watchdog);
2030         dev->set_multicast_list = smc911x_set_multicast_list;
2031         dev->ethtool_ops = &smc911x_ethtool_ops;
2032 #ifdef CONFIG_NET_POLL_CONTROLLER
2033         dev->poll_controller = smc911x_poll_controller;
2034 #endif
2035
2036         INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
2037         lp->mii.phy_id_mask = 0x1f;
2038         lp->mii.reg_num_mask = 0x1f;
2039         lp->mii.force_media = 0;
2040         lp->mii.full_duplex = 0;
2041         lp->mii.dev = dev;
2042         lp->mii.mdio_read = smc911x_phy_read;
2043         lp->mii.mdio_write = smc911x_phy_write;
2044
2045         /*
2046          * Locate the phy, if any.
2047          */
2048         smc911x_phy_detect(dev);
2049
2050         /* Set default parameters */
2051         lp->msg_enable = NETIF_MSG_LINK;
2052         lp->ctl_rfduplx = 1;
2053         lp->ctl_rspeed = 100;
2054
2055         /* Grab the IRQ */
2056         retval = request_irq(dev->irq, &smc911x_interrupt,
2057                         IRQF_SHARED | SMC_IRQ_SENSE, dev->name, dev);
2058         if (retval)
2059                 goto err_out;
2060
2061 #ifdef SMC_USE_DMA
2062         lp->rxdma = SMC_DMA_REQUEST(dev, smc911x_rx_dma_irq);
2063         lp->txdma = SMC_DMA_REQUEST(dev, smc911x_tx_dma_irq);
2064         lp->rxdma_active = 0;
2065         lp->txdma_active = 0;
2066         dev->dma = lp->rxdma;
2067 #endif
2068
2069         retval = register_netdev(dev);
2070         if (retval == 0) {
2071                 /* now, print out the card info, in a short format.. */
2072                 printk("%s: %s (rev %d) at %#lx IRQ %d",
2073                         dev->name, version_string, lp->revision,
2074                         dev->base_addr, dev->irq);
2075
2076 #ifdef SMC_USE_DMA
2077                 if (lp->rxdma != -1)
2078                         printk(" RXDMA %d ", lp->rxdma);
2079
2080                 if (lp->txdma != -1)
2081                         printk("TXDMA %d", lp->txdma);
2082 #endif
2083                 printk("\n");
2084                 if (!is_valid_ether_addr(dev->dev_addr)) {
2085                         printk("%s: Invalid ethernet MAC address. Please "
2086                                         "set using ifconfig\n", dev->name);
2087                 } else {
2088                         /* Print the Ethernet address */
2089                         printk("%s: Ethernet addr: ", dev->name);
2090                         for (i = 0; i < 5; i++)
2091                                 printk("%2.2x:", dev->dev_addr[i]);
2092                         printk("%2.2x\n", dev->dev_addr[5]);
2093                 }
2094
2095                 if (lp->phy_type == 0) {
2096                         PRINTK("%s: No PHY found\n", dev->name);
2097                 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2098                         PRINTK("%s: LAN911x Internal PHY\n", dev->name);
2099                 } else {
2100                         PRINTK("%s: External PHY 0x%08x\n", dev->name, lp->phy_type);
2101                 }
2102         }
2103
2104 err_out:
2105 #ifdef SMC_USE_DMA
2106         if (retval) {
2107                 if (lp->rxdma != -1) {
2108                         SMC_DMA_FREE(dev, lp->rxdma);
2109                 }
2110                 if (lp->txdma != -1) {
2111                         SMC_DMA_FREE(dev, lp->txdma);
2112                 }
2113         }
2114 #endif
2115         return retval;
2116 }
2117
2118 /*
2119  * smc911x_init(void)
2120  *
2121  *        Output:
2122  *       0 --> there is a device
2123  *       anything else, error
2124  */
2125 static int smc911x_drv_probe(struct platform_device *pdev)
2126 {
2127         struct net_device *ndev;
2128         struct resource *res;
2129         struct smc911x_local *lp;
2130         unsigned int *addr;
2131         int ret;
2132
2133         DBG(SMC_DEBUG_FUNC, "--> %s\n",  __FUNCTION__);
2134         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2135         if (!res) {
2136                 ret = -ENODEV;
2137                 goto out;
2138         }
2139
2140         /*
2141          * Request the regions.
2142          */
2143         if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2144                  ret = -EBUSY;
2145                  goto out;
2146         }
2147
2148         ndev = alloc_etherdev(sizeof(struct smc911x_local));
2149         if (!ndev) {
2150                 printk("%s: could not allocate device.\n", CARDNAME);
2151                 ret = -ENOMEM;
2152                 goto release_1;
2153         }
2154         SET_NETDEV_DEV(ndev, &pdev->dev);
2155
2156         ndev->dma = (unsigned char)-1;
2157         ndev->irq = platform_get_irq(pdev, 0);
2158         lp = netdev_priv(ndev);
2159         lp->netdev = ndev;
2160
2161         addr = ioremap(res->start, SMC911X_IO_EXTENT);
2162         if (!addr) {
2163                 ret = -ENOMEM;
2164                 goto release_both;
2165         }
2166
2167         platform_set_drvdata(pdev, ndev);
2168         ret = smc911x_probe(ndev, (unsigned long)addr);
2169         if (ret != 0) {
2170                 platform_set_drvdata(pdev, NULL);
2171                 iounmap(addr);
2172 release_both:
2173                 free_netdev(ndev);
2174 release_1:
2175                 release_mem_region(res->start, SMC911X_IO_EXTENT);
2176 out:
2177                 printk("%s: not found (%d).\n", CARDNAME, ret);
2178         }
2179 #ifdef SMC_USE_DMA
2180         else {
2181                 lp->physaddr = res->start;
2182                 lp->dev = &pdev->dev;
2183         }
2184 #endif
2185
2186         return ret;
2187 }
2188
2189 static int smc911x_drv_remove(struct platform_device *pdev)
2190 {
2191         struct net_device *ndev = platform_get_drvdata(pdev);
2192         struct resource *res;
2193
2194         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2195         platform_set_drvdata(pdev, NULL);
2196
2197         unregister_netdev(ndev);
2198
2199         free_irq(ndev->irq, ndev);
2200
2201 #ifdef SMC_USE_DMA
2202         {
2203                 struct smc911x_local *lp = netdev_priv(ndev);
2204                 if (lp->rxdma != -1) {
2205                         SMC_DMA_FREE(dev, lp->rxdma);
2206                 }
2207                 if (lp->txdma != -1) {
2208                         SMC_DMA_FREE(dev, lp->txdma);
2209                 }
2210         }
2211 #endif
2212         iounmap((void *)ndev->base_addr);
2213         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2214         release_mem_region(res->start, SMC911X_IO_EXTENT);
2215
2216         free_netdev(ndev);
2217         return 0;
2218 }
2219
2220 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2221 {
2222         struct net_device *ndev = platform_get_drvdata(dev);
2223         unsigned long ioaddr = ndev->base_addr;
2224
2225         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2226         if (ndev) {
2227                 if (netif_running(ndev)) {
2228                         netif_device_detach(ndev);
2229                         smc911x_shutdown(ndev);
2230 #if POWER_DOWN
2231                         /* Set D2 - Energy detect only setting */
2232                         SMC_SET_PMT_CTRL(2<<12);
2233 #endif
2234                 }
2235         }
2236         return 0;
2237 }
2238
2239 static int smc911x_drv_resume(struct platform_device *dev)
2240 {
2241         struct net_device *ndev = platform_get_drvdata(dev);
2242
2243         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2244         if (ndev) {
2245                 struct smc911x_local *lp = netdev_priv(ndev);
2246
2247                 if (netif_running(ndev)) {
2248                         smc911x_reset(ndev);
2249                         smc911x_enable(ndev);
2250                         if (lp->phy_type != 0)
2251                                 smc911x_phy_configure(&lp->phy_configure);
2252                         netif_device_attach(ndev);
2253                 }
2254         }
2255         return 0;
2256 }
2257
2258 static struct platform_driver smc911x_driver = {
2259         .probe           = smc911x_drv_probe,
2260         .remove  = smc911x_drv_remove,
2261         .suspend         = smc911x_drv_suspend,
2262         .resume  = smc911x_drv_resume,
2263         .driver  = {
2264                 .name    = CARDNAME,
2265         },
2266 };
2267
2268 static int __init smc911x_init(void)
2269 {
2270         return platform_driver_register(&smc911x_driver);
2271 }
2272
2273 static void __exit smc911x_cleanup(void)
2274 {
2275         platform_driver_unregister(&smc911x_driver);
2276 }
2277
2278 module_init(smc911x_init);
2279 module_exit(smc911x_cleanup);