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Linux/drivers/net/ethernet/smsc/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, see <http://www.gnu.org/licenses/>.
 21  *
 22  * Arguments:
 23  *       watchdog  = TX watchdog timeout
 24  *       tx_fifo_kb = Size of TX FIFO in KB
 25  *
 26  * History:
 27  *        04/16/05      Dustin McIntire          Initial version
 28  */
 29 static const char version[] =
 30          "smc911x.c: v1.0 04-16-2005 by Dustin McIntire <dustin@sensoria.com>\n";
 31 
 32 /* Debugging options */
 33 #define ENABLE_SMC_DEBUG_RX             0
 34 #define ENABLE_SMC_DEBUG_TX             0
 35 #define ENABLE_SMC_DEBUG_DMA            0
 36 #define ENABLE_SMC_DEBUG_PKTS           0
 37 #define ENABLE_SMC_DEBUG_MISC           0
 38 #define ENABLE_SMC_DEBUG_FUNC           0
 39 
 40 #define SMC_DEBUG_RX            ((ENABLE_SMC_DEBUG_RX   ? 1 : 0) << 0)
 41 #define SMC_DEBUG_TX            ((ENABLE_SMC_DEBUG_TX   ? 1 : 0) << 1)
 42 #define SMC_DEBUG_DMA           ((ENABLE_SMC_DEBUG_DMA  ? 1 : 0) << 2)
 43 #define SMC_DEBUG_PKTS          ((ENABLE_SMC_DEBUG_PKTS ? 1 : 0) << 3)
 44 #define SMC_DEBUG_MISC          ((ENABLE_SMC_DEBUG_MISC ? 1 : 0) << 4)
 45 #define SMC_DEBUG_FUNC          ((ENABLE_SMC_DEBUG_FUNC ? 1 : 0) << 5)
 46 
 47 #ifndef SMC_DEBUG
 48 #define SMC_DEBUG        ( SMC_DEBUG_RX   | \
 49                            SMC_DEBUG_TX   | \
 50                            SMC_DEBUG_DMA  | \
 51                            SMC_DEBUG_PKTS | \
 52                            SMC_DEBUG_MISC | \
 53                            SMC_DEBUG_FUNC   \
 54                          )
 55 #endif
 56 
 57 #include <linux/module.h>
 58 #include <linux/kernel.h>
 59 #include <linux/sched.h>
 60 #include <linux/delay.h>
 61 #include <linux/interrupt.h>
 62 #include <linux/errno.h>
 63 #include <linux/ioport.h>
 64 #include <linux/crc32.h>
 65 #include <linux/device.h>
 66 #include <linux/platform_device.h>
 67 #include <linux/spinlock.h>
 68 #include <linux/ethtool.h>
 69 #include <linux/mii.h>
 70 #include <linux/workqueue.h>
 71 
 72 #include <linux/netdevice.h>
 73 #include <linux/etherdevice.h>
 74 #include <linux/skbuff.h>
 75 
 76 #include <asm/io.h>
 77 
 78 #include "smc911x.h"
 79 
 80 /*
 81  * Transmit timeout, default 5 seconds.
 82  */
 83 static int watchdog = 5000;
 84 module_param(watchdog, int, 0400);
 85 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
 86 
 87 static int tx_fifo_kb=8;
 88 module_param(tx_fifo_kb, int, 0400);
 89 MODULE_PARM_DESC(tx_fifo_kb,"transmit FIFO size in KB (1<x<15)(default=8)");
 90 
 91 MODULE_LICENSE("GPL");
 92 MODULE_ALIAS("platform:smc911x");
 93 
 94 /*
 95  * The internal workings of the driver.  If you are changing anything
 96  * here with the SMC stuff, you should have the datasheet and know
 97  * what you are doing.
 98  */
 99 #define CARDNAME "smc911x"
100 
101 /*
102  * Use power-down feature of the chip
103  */
104 #define POWER_DOWN               1
105 
106 #if SMC_DEBUG > 0
107 #define DBG(n, dev, args...)                     \
108         do {                                     \
109                 if (SMC_DEBUG & (n))             \
110                         netdev_dbg(dev, args);   \
111         } while (0)
112 
113 #define PRINTK(dev, args...)   netdev_info(dev, args)
114 #else
115 #define DBG(n, dev, args...)   do { } while (0)
116 #define PRINTK(dev, args...)   netdev_dbg(dev, args)
117 #endif
118 
119 #if SMC_DEBUG_PKTS > 0
120 static void PRINT_PKT(u_char *buf, int length)
121 {
122         int i;
123         int remainder;
124         int lines;
125 
126         lines = length / 16;
127         remainder = length % 16;
128 
129         for (i = 0; i < lines ; i ++) {
130                 int cur;
131                 printk(KERN_DEBUG);
132                 for (cur = 0; cur < 8; cur++) {
133                         u_char a, b;
134                         a = *buf++;
135                         b = *buf++;
136                         pr_cont("%02x%02x ", a, b);
137                 }
138                 pr_cont("\n");
139         }
140         printk(KERN_DEBUG);
141         for (i = 0; i < remainder/2 ; i++) {
142                 u_char a, b;
143                 a = *buf++;
144                 b = *buf++;
145                 pr_cont("%02x%02x ", a, b);
146         }
147         pr_cont("\n");
148 }
149 #else
150 #define PRINT_PKT(x...)  do { } while (0)
151 #endif
152 
153 
154 /* this enables an interrupt in the interrupt mask register */
155 #define SMC_ENABLE_INT(lp, x) do {                      \
156         unsigned int  __mask;                           \
157         __mask = SMC_GET_INT_EN((lp));                  \
158         __mask |= (x);                                  \
159         SMC_SET_INT_EN((lp), __mask);                   \
160 } while (0)
161 
162 /* this disables an interrupt from the interrupt mask register */
163 #define SMC_DISABLE_INT(lp, x) do {                     \
164         unsigned int  __mask;                           \
165         __mask = SMC_GET_INT_EN((lp));                  \
166         __mask &= ~(x);                                 \
167         SMC_SET_INT_EN((lp), __mask);                   \
168 } while (0)
169 
170 /*
171  * this does a soft reset on the device
172  */
173 static void smc911x_reset(struct net_device *dev)
174 {
175         struct smc911x_local *lp = netdev_priv(dev);
176         unsigned int reg, timeout=0, resets=1, irq_cfg;
177         unsigned long flags;
178 
179         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
180 
181         /*       Take out of PM setting first */
182         if ((SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_) == 0) {
183                 /* Write to the bytetest will take out of powerdown */
184                 SMC_SET_BYTE_TEST(lp, 0);
185                 timeout=10;
186                 do {
187                         udelay(10);
188                         reg = SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_;
189                 } while (--timeout && !reg);
190                 if (timeout == 0) {
191                         PRINTK(dev, "smc911x_reset timeout waiting for PM restore\n");
192                         return;
193                 }
194         }
195 
196         /* Disable all interrupts */
197         spin_lock_irqsave(&lp->lock, flags);
198         SMC_SET_INT_EN(lp, 0);
199         spin_unlock_irqrestore(&lp->lock, flags);
200 
201         while (resets--) {
202                 SMC_SET_HW_CFG(lp, HW_CFG_SRST_);
203                 timeout=10;
204                 do {
205                         udelay(10);
206                         reg = SMC_GET_HW_CFG(lp);
207                         /* If chip indicates reset timeout then try again */
208                         if (reg & HW_CFG_SRST_TO_) {
209                                 PRINTK(dev, "chip reset timeout, retrying...\n");
210                                 resets++;
211                                 break;
212                         }
213                 } while (--timeout && (reg & HW_CFG_SRST_));
214         }
215         if (timeout == 0) {
216                 PRINTK(dev, "smc911x_reset timeout waiting for reset\n");
217                 return;
218         }
219 
220         /* make sure EEPROM has finished loading before setting GPIO_CFG */
221         timeout=1000;
222         while (--timeout && (SMC_GET_E2P_CMD(lp) & E2P_CMD_EPC_BUSY_))
223                 udelay(10);
224 
225         if (timeout == 0){
226                 PRINTK(dev, "smc911x_reset timeout waiting for EEPROM busy\n");
227                 return;
228         }
229 
230         /* Initialize interrupts */
231         SMC_SET_INT_EN(lp, 0);
232         SMC_ACK_INT(lp, -1);
233 
234         /* Reset the FIFO level and flow control settings */
235         SMC_SET_HW_CFG(lp, (lp->tx_fifo_kb & 0xF) << 16);
236 //TODO: Figure out what appropriate pause time is
237         SMC_SET_FLOW(lp, FLOW_FCPT_ | FLOW_FCEN_);
238         SMC_SET_AFC_CFG(lp, lp->afc_cfg);
239 
240 
241         /* Set to LED outputs */
242         SMC_SET_GPIO_CFG(lp, 0x70070000);
243 
244         /*
245          * Deassert IRQ for 1*10us for edge type interrupts
246          * and drive IRQ pin push-pull
247          */
248         irq_cfg = (1 << 24) | INT_CFG_IRQ_EN_ | INT_CFG_IRQ_TYPE_;
249 #ifdef SMC_DYNAMIC_BUS_CONFIG
250         if (lp->cfg.irq_polarity)
251                 irq_cfg |= INT_CFG_IRQ_POL_;
252 #endif
253         SMC_SET_IRQ_CFG(lp, irq_cfg);
254 
255         /* clear anything saved */
256         if (lp->pending_tx_skb != NULL) {
257                 dev_kfree_skb (lp->pending_tx_skb);
258                 lp->pending_tx_skb = NULL;
259                 dev->stats.tx_errors++;
260                 dev->stats.tx_aborted_errors++;
261         }
262 }
263 
264 /*
265  * Enable Interrupts, Receive, and Transmit
266  */
267 static void smc911x_enable(struct net_device *dev)
268 {
269         struct smc911x_local *lp = netdev_priv(dev);
270         unsigned mask, cfg, cr;
271         unsigned long flags;
272 
273         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
274 
275         spin_lock_irqsave(&lp->lock, flags);
276 
277         SMC_SET_MAC_ADDR(lp, dev->dev_addr);
278 
279         /* Enable TX */
280         cfg = SMC_GET_HW_CFG(lp);
281         cfg &= HW_CFG_TX_FIF_SZ_ | 0xFFF;
282         cfg |= HW_CFG_SF_;
283         SMC_SET_HW_CFG(lp, cfg);
284         SMC_SET_FIFO_TDA(lp, 0xFF);
285         /* Update TX stats on every 64 packets received or every 1 sec */
286         SMC_SET_FIFO_TSL(lp, 64);
287         SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
288 
289         SMC_GET_MAC_CR(lp, cr);
290         cr |= MAC_CR_TXEN_ | MAC_CR_HBDIS_;
291         SMC_SET_MAC_CR(lp, cr);
292         SMC_SET_TX_CFG(lp, TX_CFG_TX_ON_);
293 
294         /* Add 2 byte padding to start of packets */
295         SMC_SET_RX_CFG(lp, (2<<8) & RX_CFG_RXDOFF_);
296 
297         /* Turn on receiver and enable RX */
298         if (cr & MAC_CR_RXEN_)
299                 DBG(SMC_DEBUG_RX, dev, "Receiver already enabled\n");
300 
301         SMC_SET_MAC_CR(lp, cr | MAC_CR_RXEN_);
302 
303         /* Interrupt on every received packet */
304         SMC_SET_FIFO_RSA(lp, 0x01);
305         SMC_SET_FIFO_RSL(lp, 0x00);
306 
307         /* now, enable interrupts */
308         mask = INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_ | INT_EN_RSFL_EN_ |
309                 INT_EN_GPT_INT_EN_ | INT_EN_RXDFH_INT_EN_ | INT_EN_RXE_EN_ |
310                 INT_EN_PHY_INT_EN_;
311         if (IS_REV_A(lp->revision))
312                 mask|=INT_EN_RDFL_EN_;
313         else {
314                 mask|=INT_EN_RDFO_EN_;
315         }
316         SMC_ENABLE_INT(lp, mask);
317 
318         spin_unlock_irqrestore(&lp->lock, flags);
319 }
320 
321 /*
322  * this puts the device in an inactive state
323  */
324 static void smc911x_shutdown(struct net_device *dev)
325 {
326         struct smc911x_local *lp = netdev_priv(dev);
327         unsigned cr;
328         unsigned long flags;
329 
330         DBG(SMC_DEBUG_FUNC, dev, "%s: --> %s\n", CARDNAME, __func__);
331 
332         /* Disable IRQ's */
333         SMC_SET_INT_EN(lp, 0);
334 
335         /* Turn of Rx and TX */
336         spin_lock_irqsave(&lp->lock, flags);
337         SMC_GET_MAC_CR(lp, cr);
338         cr &= ~(MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
339         SMC_SET_MAC_CR(lp, cr);
340         SMC_SET_TX_CFG(lp, TX_CFG_STOP_TX_);
341         spin_unlock_irqrestore(&lp->lock, flags);
342 }
343 
344 static inline void smc911x_drop_pkt(struct net_device *dev)
345 {
346         struct smc911x_local *lp = netdev_priv(dev);
347         unsigned int fifo_count, timeout, reg;
348 
349         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, dev, "%s: --> %s\n",
350             CARDNAME, __func__);
351         fifo_count = SMC_GET_RX_FIFO_INF(lp) & 0xFFFF;
352         if (fifo_count <= 4) {
353                 /* Manually dump the packet data */
354                 while (fifo_count--)
355                         SMC_GET_RX_FIFO(lp);
356         } else   {
357                 /* Fast forward through the bad packet */
358                 SMC_SET_RX_DP_CTRL(lp, RX_DP_CTRL_FFWD_BUSY_);
359                 timeout=50;
360                 do {
361                         udelay(10);
362                         reg = SMC_GET_RX_DP_CTRL(lp) & RX_DP_CTRL_FFWD_BUSY_;
363                 } while (--timeout && reg);
364                 if (timeout == 0) {
365                         PRINTK(dev, "timeout waiting for RX fast forward\n");
366                 }
367         }
368 }
369 
370 /*
371  * This is the procedure to handle the receipt of a packet.
372  * It should be called after checking for packet presence in
373  * the RX status FIFO.   It must be called with the spin lock
374  * already held.
375  */
376 static inline void       smc911x_rcv(struct net_device *dev)
377 {
378         struct smc911x_local *lp = netdev_priv(dev);
379         unsigned int pkt_len, status;
380         struct sk_buff *skb;
381         unsigned char *data;
382 
383         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, dev, "--> %s\n",
384             __func__);
385         status = SMC_GET_RX_STS_FIFO(lp);
386         DBG(SMC_DEBUG_RX, dev, "Rx pkt len %d status 0x%08x\n",
387             (status & 0x3fff0000) >> 16, status & 0xc000ffff);
388         pkt_len = (status & RX_STS_PKT_LEN_) >> 16;
389         if (status & RX_STS_ES_) {
390                 /* Deal with a bad packet */
391                 dev->stats.rx_errors++;
392                 if (status & RX_STS_CRC_ERR_)
393                         dev->stats.rx_crc_errors++;
394                 else {
395                         if (status & RX_STS_LEN_ERR_)
396                                 dev->stats.rx_length_errors++;
397                         if (status & RX_STS_MCAST_)
398                                 dev->stats.multicast++;
399                 }
400                 /* Remove the bad packet data from the RX FIFO */
401                 smc911x_drop_pkt(dev);
402         } else {
403                 /* Receive a valid packet */
404                 /* Alloc a buffer with extra room for DMA alignment */
405                 skb = netdev_alloc_skb(dev, pkt_len+32);
406                 if (unlikely(skb == NULL)) {
407                         PRINTK(dev, "Low memory, rcvd packet dropped.\n");
408                         dev->stats.rx_dropped++;
409                         smc911x_drop_pkt(dev);
410                         return;
411                 }
412                 /* Align IP header to 32 bits
413                  * Note that the device is configured to add a 2
414                  * byte padding to the packet start, so we really
415                  * want to write to the orignal data pointer */
416                 data = skb->data;
417                 skb_reserve(skb, 2);
418                 skb_put(skb,pkt_len-4);
419 #ifdef SMC_USE_DMA
420                 {
421                 unsigned int fifo;
422                 /* Lower the FIFO threshold if possible */
423                 fifo = SMC_GET_FIFO_INT(lp);
424                 if (fifo & 0xFF) fifo--;
425                 DBG(SMC_DEBUG_RX, dev, "Setting RX stat FIFO threshold to %d\n",
426                     fifo & 0xff);
427                 SMC_SET_FIFO_INT(lp, fifo);
428                 /* Setup RX DMA */
429                 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN16_ | ((2<<8) & RX_CFG_RXDOFF_));
430                 lp->rxdma_active = 1;
431                 lp->current_rx_skb = skb;
432                 SMC_PULL_DATA(lp, data, (pkt_len+2+15) & ~15);
433                 /* Packet processing deferred to DMA RX interrupt */
434                 }
435 #else
436                 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN4_ | ((2<<8) & RX_CFG_RXDOFF_));
437                 SMC_PULL_DATA(lp, data, pkt_len+2+3);
438 
439                 DBG(SMC_DEBUG_PKTS, dev, "Received packet\n");
440                 PRINT_PKT(data, ((pkt_len - 4) <= 64) ? pkt_len - 4 : 64);
441                 skb->protocol = eth_type_trans(skb, dev);
442                 netif_rx(skb);
443                 dev->stats.rx_packets++;
444                 dev->stats.rx_bytes += pkt_len-4;
445 #endif
446         }
447 }
448 
449 /*
450  * This is called to actually send a packet to the chip.
451  */
452 static void smc911x_hardware_send_pkt(struct net_device *dev)
453 {
454         struct smc911x_local *lp = netdev_priv(dev);
455         struct sk_buff *skb;
456         unsigned int cmdA, cmdB, len;
457         unsigned char *buf;
458 
459         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n", __func__);
460         BUG_ON(lp->pending_tx_skb == NULL);
461 
462         skb = lp->pending_tx_skb;
463         lp->pending_tx_skb = NULL;
464 
465         /* cmdA {25:24] data alignment [20:16] start offset [10:0] buffer length */
466         /* cmdB {31:16] pkt tag [10:0] length */
467 #ifdef SMC_USE_DMA
468         /* 16 byte buffer alignment mode */
469         buf = (char*)((u32)(skb->data) & ~0xF);
470         len = (skb->len + 0xF + ((u32)skb->data & 0xF)) & ~0xF;
471         cmdA = (1<<24) | (((u32)skb->data & 0xF)<<16) |
472                         TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
473                         skb->len;
474 #else
475         buf = (char*)((u32)skb->data & ~0x3);
476         len = (skb->len + 3 + ((u32)skb->data & 3)) & ~0x3;
477         cmdA = (((u32)skb->data & 0x3) << 16) |
478                         TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
479                         skb->len;
480 #endif
481         /* tag is packet length so we can use this in stats update later */
482         cmdB = (skb->len  << 16) | (skb->len & 0x7FF);
483 
484         DBG(SMC_DEBUG_TX, dev, "TX PKT LENGTH 0x%04x (%d) BUF 0x%p CMDA 0x%08x CMDB 0x%08x\n",
485             len, len, buf, cmdA, cmdB);
486         SMC_SET_TX_FIFO(lp, cmdA);
487         SMC_SET_TX_FIFO(lp, cmdB);
488 
489         DBG(SMC_DEBUG_PKTS, dev, "Transmitted packet\n");
490         PRINT_PKT(buf, len <= 64 ? len : 64);
491 
492         /* Send pkt via PIO or DMA */
493 #ifdef SMC_USE_DMA
494         lp->current_tx_skb = skb;
495         SMC_PUSH_DATA(lp, buf, len);
496         /* DMA complete IRQ will free buffer and set jiffies */
497 #else
498         SMC_PUSH_DATA(lp, buf, len);
499         dev->trans_start = jiffies;
500         dev_kfree_skb_irq(skb);
501 #endif
502         if (!lp->tx_throttle) {
503                 netif_wake_queue(dev);
504         }
505         SMC_ENABLE_INT(lp, INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_);
506 }
507 
508 /*
509  * Since I am not sure if I will have enough room in the chip's ram
510  * to store the packet, I call this routine which either sends it
511  * now, or set the card to generates an interrupt when ready
512  * for the packet.
513  */
514 static int smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
515 {
516         struct smc911x_local *lp = netdev_priv(dev);
517         unsigned int free;
518         unsigned long flags;
519 
520         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
521             __func__);
522 
523         spin_lock_irqsave(&lp->lock, flags);
524 
525         BUG_ON(lp->pending_tx_skb != NULL);
526 
527         free = SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TDFREE_;
528         DBG(SMC_DEBUG_TX, dev, "TX free space %d\n", free);
529 
530         /* Turn off the flow when running out of space in FIFO */
531         if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
532                 DBG(SMC_DEBUG_TX, dev, "Disabling data flow due to low FIFO space (%d)\n",
533                     free);
534                 /* Reenable when at least 1 packet of size MTU present */
535                 SMC_SET_FIFO_TDA(lp, (SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
536                 lp->tx_throttle = 1;
537                 netif_stop_queue(dev);
538         }
539 
540         /* Drop packets when we run out of space in TX FIFO
541          * Account for overhead required for:
542          *
543          *        Tx command words                       8 bytes
544          *        Start offset                           15 bytes
545          *        End padding                            15 bytes
546          */
547         if (unlikely(free < (skb->len + 8 + 15 + 15))) {
548                 netdev_warn(dev, "No Tx free space %d < %d\n",
549                             free, skb->len);
550                 lp->pending_tx_skb = NULL;
551                 dev->stats.tx_errors++;
552                 dev->stats.tx_dropped++;
553                 spin_unlock_irqrestore(&lp->lock, flags);
554                 dev_kfree_skb_any(skb);
555                 return NETDEV_TX_OK;
556         }
557 
558 #ifdef SMC_USE_DMA
559         {
560                 /* If the DMA is already running then defer this packet Tx until
561                  * the DMA IRQ starts it
562                  */
563                 if (lp->txdma_active) {
564                         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Tx DMA running, deferring packet\n");
565                         lp->pending_tx_skb = skb;
566                         netif_stop_queue(dev);
567                         spin_unlock_irqrestore(&lp->lock, flags);
568                         return NETDEV_TX_OK;
569                 } else {
570                         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Activating Tx DMA\n");
571                         lp->txdma_active = 1;
572                 }
573         }
574 #endif
575         lp->pending_tx_skb = skb;
576         smc911x_hardware_send_pkt(dev);
577         spin_unlock_irqrestore(&lp->lock, flags);
578 
579         return NETDEV_TX_OK;
580 }
581 
582 /*
583  * This handles a TX status interrupt, which is only called when:
584  * - a TX error occurred, or
585  * - TX of a packet completed.
586  */
587 static void smc911x_tx(struct net_device *dev)
588 {
589         struct smc911x_local *lp = netdev_priv(dev);
590         unsigned int tx_status;
591 
592         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
593             __func__);
594 
595         /* Collect the TX status */
596         while (((SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
597                 DBG(SMC_DEBUG_TX, dev, "Tx stat FIFO used 0x%04x\n",
598                     (SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16);
599                 tx_status = SMC_GET_TX_STS_FIFO(lp);
600                 dev->stats.tx_packets++;
601                 dev->stats.tx_bytes+=tx_status>>16;
602                 DBG(SMC_DEBUG_TX, dev, "Tx FIFO tag 0x%04x status 0x%04x\n",
603                     (tx_status & 0xffff0000) >> 16,
604                     tx_status & 0x0000ffff);
605                 /* count Tx errors, but ignore lost carrier errors when in
606                  * full-duplex mode */
607                 if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
608                     !(tx_status & 0x00000306))) {
609                         dev->stats.tx_errors++;
610                 }
611                 if (tx_status & TX_STS_MANY_COLL_) {
612                         dev->stats.collisions+=16;
613                         dev->stats.tx_aborted_errors++;
614                 } else {
615                         dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
616                 }
617                 /* carrier error only has meaning for half-duplex communication */
618                 if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
619                     !lp->ctl_rfduplx) {
620                         dev->stats.tx_carrier_errors++;
621                 }
622                 if (tx_status & TX_STS_LATE_COLL_) {
623                         dev->stats.collisions++;
624                         dev->stats.tx_aborted_errors++;
625                 }
626         }
627 }
628 
629 
630 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
631 /*
632  * Reads a register from the MII Management serial interface
633  */
634 
635 static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
636 {
637         struct smc911x_local *lp = netdev_priv(dev);
638         unsigned int phydata;
639 
640         SMC_GET_MII(lp, phyreg, phyaddr, phydata);
641 
642         DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
643             __func__, phyaddr, phyreg, phydata);
644         return phydata;
645 }
646 
647 
648 /*
649  * Writes a register to the MII Management serial interface
650  */
651 static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
652                         int phydata)
653 {
654         struct smc911x_local *lp = netdev_priv(dev);
655 
656         DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
657             __func__, phyaddr, phyreg, phydata);
658 
659         SMC_SET_MII(lp, phyreg, phyaddr, phydata);
660 }
661 
662 /*
663  * Finds and reports the PHY address (115 and 117 have external
664  * PHY interface 118 has internal only
665  */
666 static void smc911x_phy_detect(struct net_device *dev)
667 {
668         struct smc911x_local *lp = netdev_priv(dev);
669         int phyaddr;
670         unsigned int cfg, id1, id2;
671 
672         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
673 
674         lp->phy_type = 0;
675 
676         /*
677          * Scan all 32 PHY addresses if necessary, starting at
678          * PHY#1 to PHY#31, and then PHY#0 last.
679          */
680         switch(lp->version) {
681                 case CHIP_9115:
682                 case CHIP_9117:
683                 case CHIP_9215:
684                 case CHIP_9217:
685                         cfg = SMC_GET_HW_CFG(lp);
686                         if (cfg & HW_CFG_EXT_PHY_DET_) {
687                                 cfg &= ~HW_CFG_PHY_CLK_SEL_;
688                                 cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
689                                 SMC_SET_HW_CFG(lp, cfg);
690                                 udelay(10); /* Wait for clocks to stop */
691 
692                                 cfg |= HW_CFG_EXT_PHY_EN_;
693                                 SMC_SET_HW_CFG(lp, cfg);
694                                 udelay(10); /* Wait for clocks to stop */
695 
696                                 cfg &= ~HW_CFG_PHY_CLK_SEL_;
697                                 cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
698                                 SMC_SET_HW_CFG(lp, cfg);
699                                 udelay(10); /* Wait for clocks to stop */
700 
701                                 cfg |= HW_CFG_SMI_SEL_;
702                                 SMC_SET_HW_CFG(lp, cfg);
703 
704                                 for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
705 
706                                         /* Read the PHY identifiers */
707                                         SMC_GET_PHY_ID1(lp, phyaddr & 31, id1);
708                                         SMC_GET_PHY_ID2(lp, phyaddr & 31, id2);
709 
710                                         /* Make sure it is a valid identifier */
711                                         if (id1 != 0x0000 && id1 != 0xffff &&
712                                             id1 != 0x8000 && id2 != 0x0000 &&
713                                             id2 != 0xffff && id2 != 0x8000) {
714                                                 /* Save the PHY's address */
715                                                 lp->mii.phy_id = phyaddr & 31;
716                                                 lp->phy_type = id1 << 16 | id2;
717                                                 break;
718                                         }
719                                 }
720                                 if (phyaddr < 32)
721                                         /* Found an external PHY */
722                                         break;
723                         }
724                 default:
725                         /* Internal media only */
726                         SMC_GET_PHY_ID1(lp, 1, id1);
727                         SMC_GET_PHY_ID2(lp, 1, id2);
728                         /* Save the PHY's address */
729                         lp->mii.phy_id = 1;
730                         lp->phy_type = id1 << 16 | id2;
731         }
732 
733         DBG(SMC_DEBUG_MISC, dev, "phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%d\n",
734             id1, id2, lp->mii.phy_id);
735 }
736 
737 /*
738  * Sets the PHY to a configuration as determined by the user.
739  * Called with spin_lock held.
740  */
741 static int smc911x_phy_fixed(struct net_device *dev)
742 {
743         struct smc911x_local *lp = netdev_priv(dev);
744         int phyaddr = lp->mii.phy_id;
745         int bmcr;
746 
747         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
748 
749         /* Enter Link Disable state */
750         SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
751         bmcr |= BMCR_PDOWN;
752         SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
753 
754         /*
755          * Set our fixed capabilities
756          * Disable auto-negotiation
757          */
758         bmcr &= ~BMCR_ANENABLE;
759         if (lp->ctl_rfduplx)
760                 bmcr |= BMCR_FULLDPLX;
761 
762         if (lp->ctl_rspeed == 100)
763                 bmcr |= BMCR_SPEED100;
764 
765         /* Write our capabilities to the phy control register */
766         SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
767 
768         /* Re-Configure the Receive/Phy Control register */
769         bmcr &= ~BMCR_PDOWN;
770         SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
771 
772         return 1;
773 }
774 
775 /**
776  * smc911x_phy_reset - reset the phy
777  * @dev: net device
778  * @phy: phy address
779  *
780  * Issue a software reset for the specified PHY and
781  * wait up to 100ms for the reset to complete.   We should
782  * not access the PHY for 50ms after issuing the reset.
783  *
784  * The time to wait appears to be dependent on the PHY.
785  *
786  */
787 static int smc911x_phy_reset(struct net_device *dev, int phy)
788 {
789         struct smc911x_local *lp = netdev_priv(dev);
790         int timeout;
791         unsigned long flags;
792         unsigned int reg;
793 
794         DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
795 
796         spin_lock_irqsave(&lp->lock, flags);
797         reg = SMC_GET_PMT_CTRL(lp);
798         reg &= ~0xfffff030;
799         reg |= PMT_CTRL_PHY_RST_;
800         SMC_SET_PMT_CTRL(lp, reg);
801         spin_unlock_irqrestore(&lp->lock, flags);
802         for (timeout = 2; timeout; timeout--) {
803                 msleep(50);
804                 spin_lock_irqsave(&lp->lock, flags);
805                 reg = SMC_GET_PMT_CTRL(lp);
806                 spin_unlock_irqrestore(&lp->lock, flags);
807                 if (!(reg & PMT_CTRL_PHY_RST_)) {
808                         /* extra delay required because the phy may
809                          * not be completed with its reset
810                          * when PHY_BCR_RESET_ is cleared. 256us
811                          * should suffice, but use 500us to be safe
812                          */
813                         udelay(500);
814                 break;
815                 }
816         }
817 
818         return reg & PMT_CTRL_PHY_RST_;
819 }
820 
821 /**
822  * smc911x_phy_powerdown - powerdown phy
823  * @dev: net device
824  * @phy: phy address
825  *
826  * Power down the specified PHY
827  */
828 static void smc911x_phy_powerdown(struct net_device *dev, int phy)
829 {
830         struct smc911x_local *lp = netdev_priv(dev);
831         unsigned int bmcr;
832 
833         /* Enter Link Disable state */
834         SMC_GET_PHY_BMCR(lp, phy, bmcr);
835         bmcr |= BMCR_PDOWN;
836         SMC_SET_PHY_BMCR(lp, phy, bmcr);
837 }
838 
839 /**
840  * smc911x_phy_check_media - check the media status and adjust BMCR
841  * @dev: net device
842  * @init: set true for initialisation
843  *
844  * Select duplex mode depending on negotiation state.   This
845  * also updates our carrier state.
846  */
847 static void smc911x_phy_check_media(struct net_device *dev, int init)
848 {
849         struct smc911x_local *lp = netdev_priv(dev);
850         int phyaddr = lp->mii.phy_id;
851         unsigned int bmcr, cr;
852 
853         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
854 
855         if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
856                 /* duplex state has changed */
857                 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
858                 SMC_GET_MAC_CR(lp, cr);
859                 if (lp->mii.full_duplex) {
860                         DBG(SMC_DEBUG_MISC, dev, "Configuring for full-duplex mode\n");
861                         bmcr |= BMCR_FULLDPLX;
862                         cr |= MAC_CR_RCVOWN_;
863                 } else {
864                         DBG(SMC_DEBUG_MISC, dev, "Configuring for half-duplex mode\n");
865                         bmcr &= ~BMCR_FULLDPLX;
866                         cr &= ~MAC_CR_RCVOWN_;
867                 }
868                 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
869                 SMC_SET_MAC_CR(lp, cr);
870         }
871 }
872 
873 /*
874  * Configures the specified PHY through the MII management interface
875  * using Autonegotiation.
876  * Calls smc911x_phy_fixed() if the user has requested a certain config.
877  * If RPC ANEG bit is set, the media selection is dependent purely on
878  * the selection by the MII (either in the MII BMCR reg or the result
879  * of autonegotiation.)  If the RPC ANEG bit is cleared, the selection
880  * is controlled by the RPC SPEED and RPC DPLX bits.
881  */
882 static void smc911x_phy_configure(struct work_struct *work)
883 {
884         struct smc911x_local *lp = container_of(work, struct smc911x_local,
885                                                 phy_configure);
886         struct net_device *dev = lp->netdev;
887         int phyaddr = lp->mii.phy_id;
888         int my_phy_caps; /* My PHY capabilities */
889         int my_ad_caps; /* My Advertised capabilities */
890         int status;
891         unsigned long flags;
892 
893         DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
894 
895         /*
896          * We should not be called if phy_type is zero.
897          */
898         if (lp->phy_type == 0)
899                 return;
900 
901         if (smc911x_phy_reset(dev, phyaddr)) {
902                 netdev_info(dev, "PHY reset timed out\n");
903                 return;
904         }
905         spin_lock_irqsave(&lp->lock, flags);
906 
907         /*
908          * Enable PHY Interrupts (for register 18)
909          * Interrupts listed here are enabled
910          */
911         SMC_SET_PHY_INT_MASK(lp, phyaddr, PHY_INT_MASK_ENERGY_ON_ |
912                  PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
913                  PHY_INT_MASK_LINK_DOWN_);
914 
915         /* If the user requested no auto neg, then go set his request */
916         if (lp->mii.force_media) {
917                 smc911x_phy_fixed(dev);
918                 goto smc911x_phy_configure_exit;
919         }
920 
921         /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
922         SMC_GET_PHY_BMSR(lp, phyaddr, my_phy_caps);
923         if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
924                 netdev_info(dev, "Auto negotiation NOT supported\n");
925                 smc911x_phy_fixed(dev);
926                 goto smc911x_phy_configure_exit;
927         }
928 
929         /* CSMA capable w/ both pauses */
930         my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
931 
932         if (my_phy_caps & BMSR_100BASE4)
933                 my_ad_caps |= ADVERTISE_100BASE4;
934         if (my_phy_caps & BMSR_100FULL)
935                 my_ad_caps |= ADVERTISE_100FULL;
936         if (my_phy_caps & BMSR_100HALF)
937                 my_ad_caps |= ADVERTISE_100HALF;
938         if (my_phy_caps & BMSR_10FULL)
939                 my_ad_caps |= ADVERTISE_10FULL;
940         if (my_phy_caps & BMSR_10HALF)
941                 my_ad_caps |= ADVERTISE_10HALF;
942 
943         /* Disable capabilities not selected by our user */
944         if (lp->ctl_rspeed != 100)
945                 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
946 
947          if (!lp->ctl_rfduplx)
948                 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
949 
950         /* Update our Auto-Neg Advertisement Register */
951         SMC_SET_PHY_MII_ADV(lp, phyaddr, my_ad_caps);
952         lp->mii.advertising = my_ad_caps;
953 
954         /*
955          * Read the register back.       Without this, it appears that when
956          * auto-negotiation is restarted, sometimes it isn't ready and
957          * the link does not come up.
958          */
959         udelay(10);
960         SMC_GET_PHY_MII_ADV(lp, phyaddr, status);
961 
962         DBG(SMC_DEBUG_MISC, dev, "phy caps=0x%04x\n", my_phy_caps);
963         DBG(SMC_DEBUG_MISC, dev, "phy advertised caps=0x%04x\n", my_ad_caps);
964 
965         /* Restart auto-negotiation process in order to advertise my caps */
966         SMC_SET_PHY_BMCR(lp, phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
967 
968         smc911x_phy_check_media(dev, 1);
969 
970 smc911x_phy_configure_exit:
971         spin_unlock_irqrestore(&lp->lock, flags);
972 }
973 
974 /*
975  * smc911x_phy_interrupt
976  *
977  * Purpose:  Handle interrupts relating to PHY register 18. This is
978  *       called from the "hard" interrupt handler under our private spinlock.
979  */
980 static void smc911x_phy_interrupt(struct net_device *dev)
981 {
982         struct smc911x_local *lp = netdev_priv(dev);
983         int phyaddr = lp->mii.phy_id;
984         int status;
985 
986         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
987 
988         if (lp->phy_type == 0)
989                 return;
990 
991         smc911x_phy_check_media(dev, 0);
992         /* read to clear status bits */
993         SMC_GET_PHY_INT_SRC(lp, phyaddr,status);
994         DBG(SMC_DEBUG_MISC, dev, "PHY interrupt status 0x%04x\n",
995             status & 0xffff);
996         DBG(SMC_DEBUG_MISC, dev, "AFC_CFG 0x%08x\n",
997             SMC_GET_AFC_CFG(lp));
998 }
999 
1000 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1001 
1002 /*
1003  * This is the main routine of the driver, to handle the device when
1004  * it needs some attention.
1005  */
1006 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1007 {
1008         struct net_device *dev = dev_id;
1009         struct smc911x_local *lp = netdev_priv(dev);
1010         unsigned int status, mask, timeout;
1011         unsigned int rx_overrun=0, cr, pkts;
1012         unsigned long flags;
1013 
1014         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1015 
1016         spin_lock_irqsave(&lp->lock, flags);
1017 
1018         /* Spurious interrupt check */
1019         if ((SMC_GET_IRQ_CFG(lp) & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1020                 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1021                 spin_unlock_irqrestore(&lp->lock, flags);
1022                 return IRQ_NONE;
1023         }
1024 
1025         mask = SMC_GET_INT_EN(lp);
1026         SMC_SET_INT_EN(lp, 0);
1027 
1028         /* set a timeout value, so I don't stay here forever */
1029         timeout = 8;
1030 
1031 
1032         do {
1033                 status = SMC_GET_INT(lp);
1034 
1035                 DBG(SMC_DEBUG_MISC, dev, "INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1036                     status, mask, status & ~mask);
1037 
1038                 status &= mask;
1039                 if (!status)
1040                         break;
1041 
1042                 /* Handle SW interrupt condition */
1043                 if (status & INT_STS_SW_INT_) {
1044                         SMC_ACK_INT(lp, INT_STS_SW_INT_);
1045                         mask &= ~INT_EN_SW_INT_EN_;
1046                 }
1047                 /* Handle various error conditions */
1048                 if (status & INT_STS_RXE_) {
1049                         SMC_ACK_INT(lp, INT_STS_RXE_);
1050                         dev->stats.rx_errors++;
1051                 }
1052                 if (status & INT_STS_RXDFH_INT_) {
1053                         SMC_ACK_INT(lp, INT_STS_RXDFH_INT_);
1054                         dev->stats.rx_dropped+=SMC_GET_RX_DROP(lp);
1055                  }
1056                 /* Undocumented interrupt-what is the right thing to do here? */
1057                 if (status & INT_STS_RXDF_INT_) {
1058                         SMC_ACK_INT(lp, INT_STS_RXDF_INT_);
1059                 }
1060 
1061                 /* Rx Data FIFO exceeds set level */
1062                 if (status & INT_STS_RDFL_) {
1063                         if (IS_REV_A(lp->revision)) {
1064                                 rx_overrun=1;
1065                                 SMC_GET_MAC_CR(lp, cr);
1066                                 cr &= ~MAC_CR_RXEN_;
1067                                 SMC_SET_MAC_CR(lp, cr);
1068                                 DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1069                                 dev->stats.rx_errors++;
1070                                 dev->stats.rx_fifo_errors++;
1071                         }
1072                         SMC_ACK_INT(lp, INT_STS_RDFL_);
1073                 }
1074                 if (status & INT_STS_RDFO_) {
1075                         if (!IS_REV_A(lp->revision)) {
1076                                 SMC_GET_MAC_CR(lp, cr);
1077                                 cr &= ~MAC_CR_RXEN_;
1078                                 SMC_SET_MAC_CR(lp, cr);
1079                                 rx_overrun=1;
1080                                 DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1081                                 dev->stats.rx_errors++;
1082                                 dev->stats.rx_fifo_errors++;
1083                         }
1084                         SMC_ACK_INT(lp, INT_STS_RDFO_);
1085                 }
1086                 /* Handle receive condition */
1087                 if ((status & INT_STS_RSFL_) || rx_overrun) {
1088                         unsigned int fifo;
1089                         DBG(SMC_DEBUG_RX, dev, "RX irq\n");
1090                         fifo = SMC_GET_RX_FIFO_INF(lp);
1091                         pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1092                         DBG(SMC_DEBUG_RX, dev, "Rx FIFO pkts %d, bytes %d\n",
1093                             pkts, fifo & 0xFFFF);
1094                         if (pkts != 0) {
1095 #ifdef SMC_USE_DMA
1096                                 unsigned int fifo;
1097                                 if (lp->rxdma_active){
1098                                         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1099                                             "RX DMA active\n");
1100                                         /* The DMA is already running so up the IRQ threshold */
1101                                         fifo = SMC_GET_FIFO_INT(lp) & ~0xFF;
1102                                         fifo |= pkts & 0xFF;
1103                                         DBG(SMC_DEBUG_RX, dev,
1104                                             "Setting RX stat FIFO threshold to %d\n",
1105                                             fifo & 0xff);
1106                                         SMC_SET_FIFO_INT(lp, fifo);
1107                                 } else
1108 #endif
1109                                 smc911x_rcv(dev);
1110                         }
1111                         SMC_ACK_INT(lp, INT_STS_RSFL_);
1112                 }
1113                 /* Handle transmit FIFO available */
1114                 if (status & INT_STS_TDFA_) {
1115                         DBG(SMC_DEBUG_TX, dev, "TX data FIFO space available irq\n");
1116                         SMC_SET_FIFO_TDA(lp, 0xFF);
1117                         lp->tx_throttle = 0;
1118 #ifdef SMC_USE_DMA
1119                         if (!lp->txdma_active)
1120 #endif
1121                                 netif_wake_queue(dev);
1122                         SMC_ACK_INT(lp, INT_STS_TDFA_);
1123                 }
1124                 /* Handle transmit done condition */
1125 #if 1
1126                 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1127                         DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC, dev,
1128                             "Tx stat FIFO limit (%d) /GPT irq\n",
1129                             (SMC_GET_FIFO_INT(lp) & 0x00ff0000) >> 16);
1130                         smc911x_tx(dev);
1131                         SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1132                         SMC_ACK_INT(lp, INT_STS_TSFL_);
1133                         SMC_ACK_INT(lp, INT_STS_TSFL_ | INT_STS_GPT_INT_);
1134                 }
1135 #else
1136                 if (status & INT_STS_TSFL_) {
1137                         DBG(SMC_DEBUG_TX, dev, "TX status FIFO limit (%d) irq\n", ?);
1138                         smc911x_tx(dev);
1139                         SMC_ACK_INT(lp, INT_STS_TSFL_);
1140                 }
1141 
1142                 if (status & INT_STS_GPT_INT_) {
1143                         DBG(SMC_DEBUG_RX, dev, "IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1144                             SMC_GET_IRQ_CFG(lp),
1145                             SMC_GET_FIFO_INT(lp),
1146                             SMC_GET_RX_CFG(lp));
1147                         DBG(SMC_DEBUG_RX, dev, "Rx Stat FIFO Used 0x%02x Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1148                             (SMC_GET_RX_FIFO_INF(lp) & 0x00ff0000) >> 16,
1149                             SMC_GET_RX_FIFO_INF(lp) & 0xffff,
1150                             SMC_GET_RX_STS_FIFO_PEEK(lp));
1151                         SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1152                         SMC_ACK_INT(lp, INT_STS_GPT_INT_);
1153                 }
1154 #endif
1155 
1156                 /* Handle PHY interrupt condition */
1157                 if (status & INT_STS_PHY_INT_) {
1158                         DBG(SMC_DEBUG_MISC, dev, "PHY irq\n");
1159                         smc911x_phy_interrupt(dev);
1160                         SMC_ACK_INT(lp, INT_STS_PHY_INT_);
1161                 }
1162         } while (--timeout);
1163 
1164         /* restore mask state */
1165         SMC_SET_INT_EN(lp, mask);
1166 
1167         DBG(SMC_DEBUG_MISC, dev, "Interrupt done (%d loops)\n",
1168             8-timeout);
1169 
1170         spin_unlock_irqrestore(&lp->lock, flags);
1171 
1172         return IRQ_HANDLED;
1173 }
1174 
1175 #ifdef SMC_USE_DMA
1176 static void
1177 smc911x_tx_dma_irq(int dma, void *data)
1178 {
1179         struct net_device *dev = (struct net_device *)data;
1180         struct smc911x_local *lp = netdev_priv(dev);
1181         struct sk_buff *skb = lp->current_tx_skb;
1182         unsigned long flags;
1183 
1184         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1185 
1186         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "TX DMA irq handler\n");
1187         /* Clear the DMA interrupt sources */
1188         SMC_DMA_ACK_IRQ(dev, dma);
1189         BUG_ON(skb == NULL);
1190         dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1191         dev->trans_start = jiffies;
1192         dev_kfree_skb_irq(skb);
1193         lp->current_tx_skb = NULL;
1194         if (lp->pending_tx_skb != NULL)
1195                 smc911x_hardware_send_pkt(dev);
1196         else {
1197                 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev,
1198                     "No pending Tx packets. DMA disabled\n");
1199                 spin_lock_irqsave(&lp->lock, flags);
1200                 lp->txdma_active = 0;
1201                 if (!lp->tx_throttle) {
1202                         netif_wake_queue(dev);
1203                 }
1204                 spin_unlock_irqrestore(&lp->lock, flags);
1205         }
1206 
1207         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev,
1208             "TX DMA irq completed\n");
1209 }
1210 static void
1211 smc911x_rx_dma_irq(int dma, void *data)
1212 {
1213         struct net_device *dev = (struct net_device *)data;
1214         struct smc911x_local *lp = netdev_priv(dev);
1215         struct sk_buff *skb = lp->current_rx_skb;
1216         unsigned long flags;
1217         unsigned int pkts;
1218 
1219         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1220         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev, "RX DMA irq handler\n");
1221         /* Clear the DMA interrupt sources */
1222         SMC_DMA_ACK_IRQ(dev, dma);
1223         dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1224         BUG_ON(skb == NULL);
1225         lp->current_rx_skb = NULL;
1226         PRINT_PKT(skb->data, skb->len);
1227         skb->protocol = eth_type_trans(skb, dev);
1228         dev->stats.rx_packets++;
1229         dev->stats.rx_bytes += skb->len;
1230         netif_rx(skb);
1231 
1232         spin_lock_irqsave(&lp->lock, flags);
1233         pkts = (SMC_GET_RX_FIFO_INF(lp) & RX_FIFO_INF_RXSUSED_) >> 16;
1234         if (pkts != 0) {
1235                 smc911x_rcv(dev);
1236         }else {
1237                 lp->rxdma_active = 0;
1238         }
1239         spin_unlock_irqrestore(&lp->lock, flags);
1240         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1241             "RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1242             pkts);
1243 }
1244 #endif   /* SMC_USE_DMA */
1245 
1246 #ifdef CONFIG_NET_POLL_CONTROLLER
1247 /*
1248  * Polling receive - used by netconsole and other diagnostic tools
1249  * to allow network i/o with interrupts disabled.
1250  */
1251 static void smc911x_poll_controller(struct net_device *dev)
1252 {
1253         disable_irq(dev->irq);
1254         smc911x_interrupt(dev->irq, dev);
1255         enable_irq(dev->irq);
1256 }
1257 #endif
1258 
1259 /* Our watchdog timed out. Called by the networking layer */
1260 static void smc911x_timeout(struct net_device *dev)
1261 {
1262         struct smc911x_local *lp = netdev_priv(dev);
1263         int status, mask;
1264         unsigned long flags;
1265 
1266         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1267 
1268         spin_lock_irqsave(&lp->lock, flags);
1269         status = SMC_GET_INT(lp);
1270         mask = SMC_GET_INT_EN(lp);
1271         spin_unlock_irqrestore(&lp->lock, flags);
1272         DBG(SMC_DEBUG_MISC, dev, "INT 0x%02x MASK 0x%02x\n",
1273             status, mask);
1274 
1275         /* Dump the current TX FIFO contents and restart */
1276         mask = SMC_GET_TX_CFG(lp);
1277         SMC_SET_TX_CFG(lp, mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1278         /*
1279          * Reconfiguring the PHY doesn't seem like a bad idea here, but
1280          * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1281          * which calls schedule().       Hence we use a work queue.
1282          */
1283         if (lp->phy_type != 0)
1284                 schedule_work(&lp->phy_configure);
1285 
1286         /* We can accept TX packets again */
1287         dev->trans_start = jiffies; /* prevent tx timeout */
1288         netif_wake_queue(dev);
1289 }
1290 
1291 /*
1292  * This routine will, depending on the values passed to it,
1293  * either make it accept multicast packets, go into
1294  * promiscuous mode (for TCPDUMP and cousins) or accept
1295  * a select set of multicast packets
1296  */
1297 static void smc911x_set_multicast_list(struct net_device *dev)
1298 {
1299         struct smc911x_local *lp = netdev_priv(dev);
1300         unsigned int multicast_table[2];
1301         unsigned int mcr, update_multicast = 0;
1302         unsigned long flags;
1303 
1304         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1305 
1306         spin_lock_irqsave(&lp->lock, flags);
1307         SMC_GET_MAC_CR(lp, mcr);
1308         spin_unlock_irqrestore(&lp->lock, flags);
1309 
1310         if (dev->flags & IFF_PROMISC) {
1311 
1312                 DBG(SMC_DEBUG_MISC, dev, "RCR_PRMS\n");
1313                 mcr |= MAC_CR_PRMS_;
1314         }
1315         /*
1316          * Here, I am setting this to accept all multicast packets.
1317          * I don't need to zero the multicast table, because the flag is
1318          * checked before the table is
1319          */
1320         else if (dev->flags & IFF_ALLMULTI || netdev_mc_count(dev) > 16) {
1321                 DBG(SMC_DEBUG_MISC, dev, "RCR_ALMUL\n");
1322                 mcr |= MAC_CR_MCPAS_;
1323         }
1324 
1325         /*
1326          * This sets the internal hardware table to filter out unwanted
1327          * multicast packets before they take up memory.
1328          *
1329          * The SMC chip uses a hash table where the high 6 bits of the CRC of
1330          * address are the offset into the table.       If that bit is 1, then the
1331          * multicast packet is accepted.  Otherwise, it's dropped silently.
1332          *
1333          * To use the 6 bits as an offset into the table, the high 1 bit is
1334          * the number of the 32 bit register, while the low 5 bits are the bit
1335          * within that register.
1336          */
1337         else if (!netdev_mc_empty(dev)) {
1338                 struct netdev_hw_addr *ha;
1339 
1340                 /* Set the Hash perfec mode */
1341                 mcr |= MAC_CR_HPFILT_;
1342 
1343                 /* start with a table of all zeros: reject all */
1344                 memset(multicast_table, 0, sizeof(multicast_table));
1345 
1346                 netdev_for_each_mc_addr(ha, dev) {
1347                         u32 position;
1348 
1349                         /* upper 6 bits are used as hash index */
1350                         position = ether_crc(ETH_ALEN, ha->addr)>>26;
1351 
1352                         multicast_table[position>>5] |= 1 << (position&0x1f);
1353                 }
1354 
1355                 /* be sure I get rid of flags I might have set */
1356                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1357 
1358                 /* now, the table can be loaded into the chipset */
1359                 update_multicast = 1;
1360         } else   {
1361                 DBG(SMC_DEBUG_MISC, dev, "~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n");
1362                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1363 
1364                 /*
1365                  * since I'm disabling all multicast entirely, I need to
1366                  * clear the multicast list
1367                  */
1368                 memset(multicast_table, 0, sizeof(multicast_table));
1369                 update_multicast = 1;
1370         }
1371 
1372         spin_lock_irqsave(&lp->lock, flags);
1373         SMC_SET_MAC_CR(lp, mcr);
1374         if (update_multicast) {
1375                 DBG(SMC_DEBUG_MISC, dev,
1376                     "update mcast hash table 0x%08x 0x%08x\n",
1377                     multicast_table[0], multicast_table[1]);
1378                 SMC_SET_HASHL(lp, multicast_table[0]);
1379                 SMC_SET_HASHH(lp, multicast_table[1]);
1380         }
1381         spin_unlock_irqrestore(&lp->lock, flags);
1382 }
1383 
1384 
1385 /*
1386  * Open and Initialize the board
1387  *
1388  * Set up everything, reset the card, etc..
1389  */
1390 static int
1391 smc911x_open(struct net_device *dev)
1392 {
1393         struct smc911x_local *lp = netdev_priv(dev);
1394 
1395         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1396 
1397         /* reset the hardware */
1398         smc911x_reset(dev);
1399 
1400         /* Configure the PHY, initialize the link state */
1401         smc911x_phy_configure(&lp->phy_configure);
1402 
1403         /* Turn on Tx + Rx */
1404         smc911x_enable(dev);
1405 
1406         netif_start_queue(dev);
1407 
1408         return 0;
1409 }
1410 
1411 /*
1412  * smc911x_close
1413  *
1414  * this makes the board clean up everything that it can
1415  * and not talk to the outside world.    Caused by
1416  * an 'ifconfig ethX down'
1417  */
1418 static int smc911x_close(struct net_device *dev)
1419 {
1420         struct smc911x_local *lp = netdev_priv(dev);
1421 
1422         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1423 
1424         netif_stop_queue(dev);
1425         netif_carrier_off(dev);
1426 
1427         /* clear everything */
1428         smc911x_shutdown(dev);
1429 
1430         if (lp->phy_type != 0) {
1431                 /* We need to ensure that no calls to
1432                  * smc911x_phy_configure are pending.
1433                  */
1434                 cancel_work_sync(&lp->phy_configure);
1435                 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1436         }
1437 
1438         if (lp->pending_tx_skb) {
1439                 dev_kfree_skb(lp->pending_tx_skb);
1440                 lp->pending_tx_skb = NULL;
1441         }
1442 
1443         return 0;
1444 }
1445 
1446 /*
1447  * Ethtool support
1448  */
1449 static int
1450 smc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1451 {
1452         struct smc911x_local *lp = netdev_priv(dev);
1453         int ret, status;
1454         unsigned long flags;
1455 
1456         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1457         cmd->maxtxpkt = 1;
1458         cmd->maxrxpkt = 1;
1459 
1460         if (lp->phy_type != 0) {
1461                 spin_lock_irqsave(&lp->lock, flags);
1462                 ret = mii_ethtool_gset(&lp->mii, cmd);
1463                 spin_unlock_irqrestore(&lp->lock, flags);
1464         } else {
1465                 cmd->supported = SUPPORTED_10baseT_Half |
1466                                 SUPPORTED_10baseT_Full |
1467                                 SUPPORTED_TP | SUPPORTED_AUI;
1468 
1469                 if (lp->ctl_rspeed == 10)
1470                         ethtool_cmd_speed_set(cmd, SPEED_10);
1471                 else if (lp->ctl_rspeed == 100)
1472                         ethtool_cmd_speed_set(cmd, SPEED_100);
1473 
1474                 cmd->autoneg = AUTONEG_DISABLE;
1475                 if (lp->mii.phy_id==1)
1476                         cmd->transceiver = XCVR_INTERNAL;
1477                 else
1478                         cmd->transceiver = XCVR_EXTERNAL;
1479                 cmd->port = 0;
1480                 SMC_GET_PHY_SPECIAL(lp, lp->mii.phy_id, status);
1481                 cmd->duplex =
1482                         (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1483                                 DUPLEX_FULL : DUPLEX_HALF;
1484                 ret = 0;
1485         }
1486 
1487         return ret;
1488 }
1489 
1490 static int
1491 smc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1492 {
1493         struct smc911x_local *lp = netdev_priv(dev);
1494         int ret;
1495         unsigned long flags;
1496 
1497         if (lp->phy_type != 0) {
1498                 spin_lock_irqsave(&lp->lock, flags);
1499                 ret = mii_ethtool_sset(&lp->mii, cmd);
1500                 spin_unlock_irqrestore(&lp->lock, flags);
1501         } else {
1502                 if (cmd->autoneg != AUTONEG_DISABLE ||
1503                         cmd->speed != SPEED_10 ||
1504                         (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1505                         (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1506                         return -EINVAL;
1507 
1508                 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1509 
1510                 ret = 0;
1511         }
1512 
1513         return ret;
1514 }
1515 
1516 static void
1517 smc911x_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1518 {
1519         strlcpy(info->driver, CARDNAME, sizeof(info->driver));
1520         strlcpy(info->version, version, sizeof(info->version));
1521         strlcpy(info->bus_info, dev_name(dev->dev.parent),
1522                 sizeof(info->bus_info));
1523 }
1524 
1525 static int smc911x_ethtool_nwayreset(struct net_device *dev)
1526 {
1527         struct smc911x_local *lp = netdev_priv(dev);
1528         int ret = -EINVAL;
1529         unsigned long flags;
1530 
1531         if (lp->phy_type != 0) {
1532                 spin_lock_irqsave(&lp->lock, flags);
1533                 ret = mii_nway_restart(&lp->mii);
1534                 spin_unlock_irqrestore(&lp->lock, flags);
1535         }
1536 
1537         return ret;
1538 }
1539 
1540 static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1541 {
1542         struct smc911x_local *lp = netdev_priv(dev);
1543         return lp->msg_enable;
1544 }
1545 
1546 static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1547 {
1548         struct smc911x_local *lp = netdev_priv(dev);
1549         lp->msg_enable = level;
1550 }
1551 
1552 static int smc911x_ethtool_getregslen(struct net_device *dev)
1553 {
1554         /* System regs + MAC regs + PHY regs */
1555         return (((E2P_CMD - ID_REV)/4 + 1) +
1556                         (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1557 }
1558 
1559 static void smc911x_ethtool_getregs(struct net_device *dev,
1560                                                                                  struct ethtool_regs* regs, void *buf)
1561 {
1562         struct smc911x_local *lp = netdev_priv(dev);
1563         unsigned long flags;
1564         u32 reg,i,j=0;
1565         u32 *data = (u32*)buf;
1566 
1567         regs->version = lp->version;
1568         for(i=ID_REV;i<=E2P_CMD;i+=4) {
1569                 data[j++] = SMC_inl(lp, i);
1570         }
1571         for(i=MAC_CR;i<=WUCSR;i++) {
1572                 spin_lock_irqsave(&lp->lock, flags);
1573                 SMC_GET_MAC_CSR(lp, i, reg);
1574                 spin_unlock_irqrestore(&lp->lock, flags);
1575                 data[j++] = reg;
1576         }
1577         for(i=0;i<=31;i++) {
1578                 spin_lock_irqsave(&lp->lock, flags);
1579                 SMC_GET_MII(lp, i, lp->mii.phy_id, reg);
1580                 spin_unlock_irqrestore(&lp->lock, flags);
1581                 data[j++] = reg & 0xFFFF;
1582         }
1583 }
1584 
1585 static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1586 {
1587         struct smc911x_local *lp = netdev_priv(dev);
1588         unsigned int timeout;
1589         int e2p_cmd;
1590 
1591         e2p_cmd = SMC_GET_E2P_CMD(lp);
1592         for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1593                 if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1594                         PRINTK(dev, "%s timeout waiting for EEPROM to respond\n",
1595                                __func__);
1596                         return -EFAULT;
1597                 }
1598                 mdelay(1);
1599                 e2p_cmd = SMC_GET_E2P_CMD(lp);
1600         }
1601         if (timeout == 0) {
1602                 PRINTK(dev, "%s timeout waiting for EEPROM CMD not busy\n",
1603                        __func__);
1604                 return -ETIMEDOUT;
1605         }
1606         return 0;
1607 }
1608 
1609 static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1610                                                                                                         int cmd, int addr)
1611 {
1612         struct smc911x_local *lp = netdev_priv(dev);
1613         int ret;
1614 
1615         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1616                 return ret;
1617         SMC_SET_E2P_CMD(lp, E2P_CMD_EPC_BUSY_ |
1618                 ((cmd) & (0x7<<28)) |
1619                 ((addr) & 0xFF));
1620         return 0;
1621 }
1622 
1623 static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1624                                                                                                         u8 *data)
1625 {
1626         struct smc911x_local *lp = netdev_priv(dev);
1627         int ret;
1628 
1629         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1630                 return ret;
1631         *data = SMC_GET_E2P_DATA(lp);
1632         return 0;
1633 }
1634 
1635 static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1636                                                                                                          u8 data)
1637 {
1638         struct smc911x_local *lp = netdev_priv(dev);
1639         int ret;
1640 
1641         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1642                 return ret;
1643         SMC_SET_E2P_DATA(lp, data);
1644         return 0;
1645 }
1646 
1647 static int smc911x_ethtool_geteeprom(struct net_device *dev,
1648                                                                           struct ethtool_eeprom *eeprom, u8 *data)
1649 {
1650         u8 eebuf[SMC911X_EEPROM_LEN];
1651         int i, ret;
1652 
1653         for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1654                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1655                         return ret;
1656                 if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1657                         return ret;
1658                 }
1659         memcpy(data, eebuf+eeprom->offset, eeprom->len);
1660         return 0;
1661 }
1662 
1663 static int smc911x_ethtool_seteeprom(struct net_device *dev,
1664                                                                            struct ethtool_eeprom *eeprom, u8 *data)
1665 {
1666         int i, ret;
1667 
1668         /* Enable erase */
1669         if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1670                 return ret;
1671         for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1672                 /* erase byte */
1673                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1674                         return ret;
1675                 /* write byte */
1676                 if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1677                          return ret;
1678                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1679                         return ret;
1680                 }
1681          return 0;
1682 }
1683 
1684 static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1685 {
1686          return SMC911X_EEPROM_LEN;
1687 }
1688 
1689 static const struct ethtool_ops smc911x_ethtool_ops = {
1690         .get_settings    = smc911x_ethtool_getsettings,
1691         .set_settings    = smc911x_ethtool_setsettings,
1692         .get_drvinfo     = smc911x_ethtool_getdrvinfo,
1693         .get_msglevel    = smc911x_ethtool_getmsglevel,
1694         .set_msglevel    = smc911x_ethtool_setmsglevel,
1695         .nway_reset = smc911x_ethtool_nwayreset,
1696         .get_link        = ethtool_op_get_link,
1697         .get_regs_len    = smc911x_ethtool_getregslen,
1698         .get_regs        = smc911x_ethtool_getregs,
1699         .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1700         .get_eeprom = smc911x_ethtool_geteeprom,
1701         .set_eeprom = smc911x_ethtool_seteeprom,
1702 };
1703 
1704 /*
1705  * smc911x_findirq
1706  *
1707  * This routine has a simple purpose -- make the SMC chip generate an
1708  * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1709  */
1710 static int smc911x_findirq(struct net_device *dev)
1711 {
1712         struct smc911x_local *lp = netdev_priv(dev);
1713         int timeout = 20;
1714         unsigned long cookie;
1715 
1716         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1717 
1718         cookie = probe_irq_on();
1719 
1720         /*
1721          * Force a SW interrupt
1722          */
1723 
1724         SMC_SET_INT_EN(lp, INT_EN_SW_INT_EN_);
1725 
1726         /*
1727          * Wait until positive that the interrupt has been generated
1728          */
1729         do {
1730                 int int_status;
1731                 udelay(10);
1732                 int_status = SMC_GET_INT_EN(lp);
1733                 if (int_status & INT_EN_SW_INT_EN_)
1734                          break;         /* got the interrupt */
1735         } while (--timeout);
1736 
1737         /*
1738          * there is really nothing that I can do here if timeout fails,
1739          * as autoirq_report will return a 0 anyway, which is what I
1740          * want in this case.    Plus, the clean up is needed in both
1741          * cases.
1742          */
1743 
1744         /* and disable all interrupts again */
1745         SMC_SET_INT_EN(lp, 0);
1746 
1747         /* and return what I found */
1748         return probe_irq_off(cookie);
1749 }
1750 
1751 static const struct net_device_ops smc911x_netdev_ops = {
1752         .ndo_open               = smc911x_open,
1753         .ndo_stop               = smc911x_close,
1754         .ndo_start_xmit         = smc911x_hard_start_xmit,
1755         .ndo_tx_timeout         = smc911x_timeout,
1756         .ndo_set_rx_mode        = smc911x_set_multicast_list,
1757         .ndo_change_mtu         = eth_change_mtu,
1758         .ndo_validate_addr      = eth_validate_addr,
1759         .ndo_set_mac_address    = eth_mac_addr,
1760 #ifdef CONFIG_NET_POLL_CONTROLLER
1761         .ndo_poll_controller    = smc911x_poll_controller,
1762 #endif
1763 };
1764 
1765 /*
1766  * Function: smc911x_probe(unsigned long ioaddr)
1767  *
1768  * Purpose:
1769  *       Tests to see if a given ioaddr points to an SMC911x chip.
1770  *       Returns a 0 on success
1771  *
1772  * Algorithm:
1773  *       (1) see if the endian word is OK
1774  *       (1) see if I recognize the chip ID in the appropriate register
1775  *
1776  * Here I do typical initialization tasks.
1777  *
1778  * o  Initialize the structure if needed
1779  * o  print out my vanity message if not done so already
1780  * o  print out what type of hardware is detected
1781  * o  print out the ethernet address
1782  * o  find the IRQ
1783  * o  set up my private data
1784  * o  configure the dev structure with my subroutines
1785  * o  actually GRAB the irq.
1786  * o  GRAB the region
1787  */
1788 static int smc911x_probe(struct net_device *dev)
1789 {
1790         struct smc911x_local *lp = netdev_priv(dev);
1791         int i, retval;
1792         unsigned int val, chip_id, revision;
1793         const char *version_string;
1794         unsigned long irq_flags;
1795 
1796         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1797 
1798         /* First, see if the endian word is recognized */
1799         val = SMC_GET_BYTE_TEST(lp);
1800         DBG(SMC_DEBUG_MISC, dev, "%s: endian probe returned 0x%04x\n",
1801             CARDNAME, val);
1802         if (val != 0x87654321) {
1803                 netdev_err(dev, "Invalid chip endian 0x%08x\n", val);
1804                 retval = -ENODEV;
1805                 goto err_out;
1806         }
1807 
1808         /*
1809          * check if the revision register is something that I
1810          * recognize.   These might need to be added to later,
1811          * as future revisions could be added.
1812          */
1813         chip_id = SMC_GET_PN(lp);
1814         DBG(SMC_DEBUG_MISC, dev, "%s: id probe returned 0x%04x\n",
1815             CARDNAME, chip_id);
1816         for(i=0;chip_ids[i].id != 0; i++) {
1817                 if (chip_ids[i].id == chip_id) break;
1818         }
1819         if (!chip_ids[i].id) {
1820                 netdev_err(dev, "Unknown chip ID %04x\n", chip_id);
1821                 retval = -ENODEV;
1822                 goto err_out;
1823         }
1824         version_string = chip_ids[i].name;
1825 
1826         revision = SMC_GET_REV(lp);
1827         DBG(SMC_DEBUG_MISC, dev, "%s: revision = 0x%04x\n", CARDNAME, revision);
1828 
1829         /* At this point I'll assume that the chip is an SMC911x. */
1830         DBG(SMC_DEBUG_MISC, dev, "%s: Found a %s\n",
1831             CARDNAME, chip_ids[i].name);
1832 
1833         /* Validate the TX FIFO size requested */
1834         if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1835                 netdev_err(dev, "Invalid TX FIFO size requested %d\n",
1836                            tx_fifo_kb);
1837                 retval = -EINVAL;
1838                 goto err_out;
1839         }
1840 
1841         /* fill in some of the fields */
1842         lp->version = chip_ids[i].id;
1843         lp->revision = revision;
1844         lp->tx_fifo_kb = tx_fifo_kb;
1845         /* Reverse calculate the RX FIFO size from the TX */
1846         lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1847         lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1848 
1849         /* Set the automatic flow control values */
1850         switch(lp->tx_fifo_kb) {
1851                 /*
1852                  *       AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1853                  *       AFC_LO is AFC_HI/2
1854                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1855                  */
1856                 case 2:/* 13440 Rx Data Fifo Size */
1857                         lp->afc_cfg=0x008C46AF;break;
1858                 case 3:/* 12480 Rx Data Fifo Size */
1859                         lp->afc_cfg=0x0082419F;break;
1860                 case 4:/* 11520 Rx Data Fifo Size */
1861                         lp->afc_cfg=0x00783C9F;break;
1862                 case 5:/* 10560 Rx Data Fifo Size */
1863                         lp->afc_cfg=0x006E374F;break;
1864                 case 6:/* 9600 Rx Data Fifo Size */
1865                         lp->afc_cfg=0x0064328F;break;
1866                 case 7:/* 8640 Rx Data Fifo Size */
1867                         lp->afc_cfg=0x005A2D7F;break;
1868                 case 8:/* 7680 Rx Data Fifo Size */
1869                         lp->afc_cfg=0x0050287F;break;
1870                 case 9:/* 6720 Rx Data Fifo Size */
1871                         lp->afc_cfg=0x0046236F;break;
1872                 case 10:/* 5760 Rx Data Fifo Size */
1873                         lp->afc_cfg=0x003C1E6F;break;
1874                 case 11:/* 4800 Rx Data Fifo Size */
1875                         lp->afc_cfg=0x0032195F;break;
1876                 /*
1877                  *       AFC_HI is ~1520 bytes less than RX Data Fifo Size
1878                  *       AFC_LO is AFC_HI/2
1879                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1880                  */
1881                 case 12:/* 3840 Rx Data Fifo Size */
1882                         lp->afc_cfg=0x0024124F;break;
1883                 case 13:/* 2880 Rx Data Fifo Size */
1884                         lp->afc_cfg=0x0015073F;break;
1885                 case 14:/* 1920 Rx Data Fifo Size */
1886                         lp->afc_cfg=0x0006032F;break;
1887                  default:
1888                          PRINTK(dev, "ERROR -- no AFC_CFG setting found");
1889                          break;
1890         }
1891 
1892         DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX, dev,
1893             "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1894             lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1895 
1896         spin_lock_init(&lp->lock);
1897 
1898         /* Get the MAC address */
1899         SMC_GET_MAC_ADDR(lp, dev->dev_addr);
1900 
1901         /* now, reset the chip, and put it into a known state */
1902         smc911x_reset(dev);
1903 
1904         /*
1905          * If dev->irq is 0, then the device has to be banged on to see
1906          * what the IRQ is.
1907          *
1908          * Specifying an IRQ is done with the assumption that the user knows
1909          * what (s)he is doing.  No checking is done!!!!
1910          */
1911         if (dev->irq < 1) {
1912                 int trials;
1913 
1914                 trials = 3;
1915                 while (trials--) {
1916                         dev->irq = smc911x_findirq(dev);
1917                         if (dev->irq)
1918                                 break;
1919                         /* kick the card and try again */
1920                         smc911x_reset(dev);
1921                 }
1922         }
1923         if (dev->irq == 0) {
1924                 netdev_warn(dev, "Couldn't autodetect your IRQ. Use irq=xx.\n");
1925                 retval = -ENODEV;
1926                 goto err_out;
1927         }
1928         dev->irq = irq_canonicalize(dev->irq);
1929 
1930         /* Fill in the fields of the device structure with ethernet values. */
1931         ether_setup(dev);
1932 
1933         dev->netdev_ops = &smc911x_netdev_ops;
1934         dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1935         dev->ethtool_ops = &smc911x_ethtool_ops;
1936 
1937         INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
1938         lp->mii.phy_id_mask = 0x1f;
1939         lp->mii.reg_num_mask = 0x1f;
1940         lp->mii.force_media = 0;
1941         lp->mii.full_duplex = 0;
1942         lp->mii.dev = dev;
1943         lp->mii.mdio_read = smc911x_phy_read;
1944         lp->mii.mdio_write = smc911x_phy_write;
1945 
1946         /*
1947          * Locate the phy, if any.
1948          */
1949         smc911x_phy_detect(dev);
1950 
1951         /* Set default parameters */
1952         lp->msg_enable = NETIF_MSG_LINK;
1953         lp->ctl_rfduplx = 1;
1954         lp->ctl_rspeed = 100;
1955 
1956 #ifdef SMC_DYNAMIC_BUS_CONFIG
1957         irq_flags = lp->cfg.irq_flags;
1958 #else
1959         irq_flags = IRQF_SHARED | SMC_IRQ_SENSE;
1960 #endif
1961 
1962         /* Grab the IRQ */
1963         retval = request_irq(dev->irq, smc911x_interrupt,
1964                              irq_flags, dev->name, dev);
1965         if (retval)
1966                 goto err_out;
1967 
1968 #ifdef SMC_USE_DMA
1969         lp->rxdma = SMC_DMA_REQUEST(dev, smc911x_rx_dma_irq);
1970         lp->txdma = SMC_DMA_REQUEST(dev, smc911x_tx_dma_irq);
1971         lp->rxdma_active = 0;
1972         lp->txdma_active = 0;
1973         dev->dma = lp->rxdma;
1974 #endif
1975 
1976         retval = register_netdev(dev);
1977         if (retval == 0) {
1978                 /* now, print out the card info, in a short format.. */
1979                 netdev_info(dev, "%s (rev %d) at %#lx IRQ %d",
1980                             version_string, lp->revision,
1981                             dev->base_addr, dev->irq);
1982 
1983 #ifdef SMC_USE_DMA
1984                 if (lp->rxdma != -1)
1985                         pr_cont(" RXDMA %d", lp->rxdma);
1986 
1987                 if (lp->txdma != -1)
1988                         pr_cont(" TXDMA %d", lp->txdma);
1989 #endif
1990                 pr_cont("\n");
1991                 if (!is_valid_ether_addr(dev->dev_addr)) {
1992                         netdev_warn(dev, "Invalid ethernet MAC address. Please set using ifconfig\n");
1993                 } else {
1994                         /* Print the Ethernet address */
1995                         netdev_info(dev, "Ethernet addr: %pM\n",
1996                                     dev->dev_addr);
1997                 }
1998 
1999                 if (lp->phy_type == 0) {
2000                         PRINTK(dev, "No PHY found\n");
2001                 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2002                         PRINTK(dev, "LAN911x Internal PHY\n");
2003                 } else {
2004                         PRINTK(dev, "External PHY 0x%08x\n", lp->phy_type);
2005                 }
2006         }
2007 
2008 err_out:
2009 #ifdef SMC_USE_DMA
2010         if (retval) {
2011                 if (lp->rxdma != -1) {
2012                         SMC_DMA_FREE(dev, lp->rxdma);
2013                 }
2014                 if (lp->txdma != -1) {
2015                         SMC_DMA_FREE(dev, lp->txdma);
2016                 }
2017         }
2018 #endif
2019         return retval;
2020 }
2021 
2022 /*
2023  * smc911x_drv_probe(void)
2024  *
2025  *        Output:
2026  *       0 --> there is a device
2027  *       anything else, error
2028  */
2029 static int smc911x_drv_probe(struct platform_device *pdev)
2030 {
2031         struct net_device *ndev;
2032         struct resource *res;
2033         struct smc911x_local *lp;
2034         void __iomem *addr;
2035         int ret;
2036 
2037         /* ndev is not valid yet, so avoid passing it in. */
2038         DBG(SMC_DEBUG_FUNC, "--> %s\n",  __func__);
2039         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2040         if (!res) {
2041                 ret = -ENODEV;
2042                 goto out;
2043         }
2044 
2045         /*
2046          * Request the regions.
2047          */
2048         if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2049                  ret = -EBUSY;
2050                  goto out;
2051         }
2052 
2053         ndev = alloc_etherdev(sizeof(struct smc911x_local));
2054         if (!ndev) {
2055                 ret = -ENOMEM;
2056                 goto release_1;
2057         }
2058         SET_NETDEV_DEV(ndev, &pdev->dev);
2059 
2060         ndev->dma = (unsigned char)-1;
2061         ndev->irq = platform_get_irq(pdev, 0);
2062         lp = netdev_priv(ndev);
2063         lp->netdev = ndev;
2064 #ifdef SMC_DYNAMIC_BUS_CONFIG
2065         {
2066                 struct smc911x_platdata *pd = dev_get_platdata(&pdev->dev);
2067                 if (!pd) {
2068                         ret = -EINVAL;
2069                         goto release_both;
2070                 }
2071                 memcpy(&lp->cfg, pd, sizeof(lp->cfg));
2072         }
2073 #endif
2074 
2075         addr = ioremap(res->start, SMC911X_IO_EXTENT);
2076         if (!addr) {
2077                 ret = -ENOMEM;
2078                 goto release_both;
2079         }
2080 
2081         platform_set_drvdata(pdev, ndev);
2082         lp->base = addr;
2083         ndev->base_addr = res->start;
2084         ret = smc911x_probe(ndev);
2085         if (ret != 0) {
2086                 iounmap(addr);
2087 release_both:
2088                 free_netdev(ndev);
2089 release_1:
2090                 release_mem_region(res->start, SMC911X_IO_EXTENT);
2091 out:
2092                 pr_info("%s: not found (%d).\n", CARDNAME, ret);
2093         }
2094 #ifdef SMC_USE_DMA
2095         else {
2096                 lp->physaddr = res->start;
2097                 lp->dev = &pdev->dev;
2098         }
2099 #endif
2100 
2101         return ret;
2102 }
2103 
2104 static int smc911x_drv_remove(struct platform_device *pdev)
2105 {
2106         struct net_device *ndev = platform_get_drvdata(pdev);
2107         struct smc911x_local *lp = netdev_priv(ndev);
2108         struct resource *res;
2109 
2110         DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2111 
2112         unregister_netdev(ndev);
2113 
2114         free_irq(ndev->irq, ndev);
2115 
2116 #ifdef SMC_USE_DMA
2117         {
2118                 if (lp->rxdma != -1) {
2119                         SMC_DMA_FREE(dev, lp->rxdma);
2120                 }
2121                 if (lp->txdma != -1) {
2122                         SMC_DMA_FREE(dev, lp->txdma);
2123                 }
2124         }
2125 #endif
2126         iounmap(lp->base);
2127         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2128         release_mem_region(res->start, SMC911X_IO_EXTENT);
2129 
2130         free_netdev(ndev);
2131         return 0;
2132 }
2133 
2134 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2135 {
2136         struct net_device *ndev = platform_get_drvdata(dev);
2137         struct smc911x_local *lp = netdev_priv(ndev);
2138 
2139         DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2140         if (ndev) {
2141                 if (netif_running(ndev)) {
2142                         netif_device_detach(ndev);
2143                         smc911x_shutdown(ndev);
2144 #if POWER_DOWN
2145                         /* Set D2 - Energy detect only setting */
2146                         SMC_SET_PMT_CTRL(lp, 2<<12);
2147 #endif
2148                 }
2149         }
2150         return 0;
2151 }
2152 
2153 static int smc911x_drv_resume(struct platform_device *dev)
2154 {
2155         struct net_device *ndev = platform_get_drvdata(dev);
2156 
2157         DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2158         if (ndev) {
2159                 struct smc911x_local *lp = netdev_priv(ndev);
2160 
2161                 if (netif_running(ndev)) {
2162                         smc911x_reset(ndev);
2163                         if (lp->phy_type != 0)
2164                                 smc911x_phy_configure(&lp->phy_configure);
2165                         smc911x_enable(ndev);
2166                         netif_device_attach(ndev);
2167                 }
2168         }
2169         return 0;
2170 }
2171 
2172 static struct platform_driver smc911x_driver = {
2173         .probe           = smc911x_drv_probe,
2174         .remove  = smc911x_drv_remove,
2175         .suspend         = smc911x_drv_suspend,
2176         .resume  = smc911x_drv_resume,
2177         .driver  = {
2178                 .name    = CARDNAME,
2179                 .owner  = THIS_MODULE,
2180         },
2181 };
2182 
2183 module_platform_driver(smc911x_driver);
2184 

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