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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 <linux/dmaengine.h>
 77 #include <linux/dma/pxa-dma.h>
 78 
 79 #include <asm/io.h>
 80 
 81 #include "smc911x.h"
 82 
 83 /*
 84  * Transmit timeout, default 5 seconds.
 85  */
 86 static int watchdog = 5000;
 87 module_param(watchdog, int, 0400);
 88 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
 89 
 90 static int tx_fifo_kb=8;
 91 module_param(tx_fifo_kb, int, 0400);
 92 MODULE_PARM_DESC(tx_fifo_kb,"transmit FIFO size in KB (1<x<15)(default=8)");
 93 
 94 MODULE_LICENSE("GPL");
 95 MODULE_ALIAS("platform:smc911x");
 96 
 97 /*
 98  * The internal workings of the driver.  If you are changing anything
 99  * here with the SMC stuff, you should have the datasheet and know
100  * what you are doing.
101  */
102 #define CARDNAME "smc911x"
103 
104 /*
105  * Use power-down feature of the chip
106  */
107 #define POWER_DOWN               1
108 
109 #if SMC_DEBUG > 0
110 #define DBG(n, dev, args...)                     \
111         do {                                     \
112                 if (SMC_DEBUG & (n))             \
113                         netdev_dbg(dev, args);   \
114         } while (0)
115 
116 #define PRINTK(dev, args...)   netdev_info(dev, args)
117 #else
118 #define DBG(n, dev, args...)   do { } while (0)
119 #define PRINTK(dev, args...)   netdev_dbg(dev, args)
120 #endif
121 
122 #if SMC_DEBUG_PKTS > 0
123 static void PRINT_PKT(u_char *buf, int length)
124 {
125         int i;
126         int remainder;
127         int lines;
128 
129         lines = length / 16;
130         remainder = length % 16;
131 
132         for (i = 0; i < lines ; i ++) {
133                 int cur;
134                 printk(KERN_DEBUG);
135                 for (cur = 0; cur < 8; cur++) {
136                         u_char a, b;
137                         a = *buf++;
138                         b = *buf++;
139                         pr_cont("%02x%02x ", a, b);
140                 }
141                 pr_cont("\n");
142         }
143         printk(KERN_DEBUG);
144         for (i = 0; i < remainder/2 ; i++) {
145                 u_char a, b;
146                 a = *buf++;
147                 b = *buf++;
148                 pr_cont("%02x%02x ", a, b);
149         }
150         pr_cont("\n");
151 }
152 #else
153 #define PRINT_PKT(x...)  do { } while (0)
154 #endif
155 
156 
157 /* this enables an interrupt in the interrupt mask register */
158 #define SMC_ENABLE_INT(lp, x) do {                      \
159         unsigned int  __mask;                           \
160         __mask = SMC_GET_INT_EN((lp));                  \
161         __mask |= (x);                                  \
162         SMC_SET_INT_EN((lp), __mask);                   \
163 } while (0)
164 
165 /* this disables an interrupt from the interrupt mask register */
166 #define SMC_DISABLE_INT(lp, x) do {                     \
167         unsigned int  __mask;                           \
168         __mask = SMC_GET_INT_EN((lp));                  \
169         __mask &= ~(x);                                 \
170         SMC_SET_INT_EN((lp), __mask);                   \
171 } while (0)
172 
173 /*
174  * this does a soft reset on the device
175  */
176 static void smc911x_reset(struct net_device *dev)
177 {
178         struct smc911x_local *lp = netdev_priv(dev);
179         unsigned int reg, timeout=0, resets=1, irq_cfg;
180         unsigned long flags;
181 
182         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
183 
184         /*       Take out of PM setting first */
185         if ((SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_) == 0) {
186                 /* Write to the bytetest will take out of powerdown */
187                 SMC_SET_BYTE_TEST(lp, 0);
188                 timeout=10;
189                 do {
190                         udelay(10);
191                         reg = SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_;
192                 } while (--timeout && !reg);
193                 if (timeout == 0) {
194                         PRINTK(dev, "smc911x_reset timeout waiting for PM restore\n");
195                         return;
196                 }
197         }
198 
199         /* Disable all interrupts */
200         spin_lock_irqsave(&lp->lock, flags);
201         SMC_SET_INT_EN(lp, 0);
202         spin_unlock_irqrestore(&lp->lock, flags);
203 
204         while (resets--) {
205                 SMC_SET_HW_CFG(lp, HW_CFG_SRST_);
206                 timeout=10;
207                 do {
208                         udelay(10);
209                         reg = SMC_GET_HW_CFG(lp);
210                         /* If chip indicates reset timeout then try again */
211                         if (reg & HW_CFG_SRST_TO_) {
212                                 PRINTK(dev, "chip reset timeout, retrying...\n");
213                                 resets++;
214                                 break;
215                         }
216                 } while (--timeout && (reg & HW_CFG_SRST_));
217         }
218         if (timeout == 0) {
219                 PRINTK(dev, "smc911x_reset timeout waiting for reset\n");
220                 return;
221         }
222 
223         /* make sure EEPROM has finished loading before setting GPIO_CFG */
224         timeout=1000;
225         while (--timeout && (SMC_GET_E2P_CMD(lp) & E2P_CMD_EPC_BUSY_))
226                 udelay(10);
227 
228         if (timeout == 0){
229                 PRINTK(dev, "smc911x_reset timeout waiting for EEPROM busy\n");
230                 return;
231         }
232 
233         /* Initialize interrupts */
234         SMC_SET_INT_EN(lp, 0);
235         SMC_ACK_INT(lp, -1);
236 
237         /* Reset the FIFO level and flow control settings */
238         SMC_SET_HW_CFG(lp, (lp->tx_fifo_kb & 0xF) << 16);
239 //TODO: Figure out what appropriate pause time is
240         SMC_SET_FLOW(lp, FLOW_FCPT_ | FLOW_FCEN_);
241         SMC_SET_AFC_CFG(lp, lp->afc_cfg);
242 
243 
244         /* Set to LED outputs */
245         SMC_SET_GPIO_CFG(lp, 0x70070000);
246 
247         /*
248          * Deassert IRQ for 1*10us for edge type interrupts
249          * and drive IRQ pin push-pull
250          */
251         irq_cfg = (1 << 24) | INT_CFG_IRQ_EN_ | INT_CFG_IRQ_TYPE_;
252 #ifdef SMC_DYNAMIC_BUS_CONFIG
253         if (lp->cfg.irq_polarity)
254                 irq_cfg |= INT_CFG_IRQ_POL_;
255 #endif
256         SMC_SET_IRQ_CFG(lp, irq_cfg);
257 
258         /* clear anything saved */
259         if (lp->pending_tx_skb != NULL) {
260                 dev_kfree_skb (lp->pending_tx_skb);
261                 lp->pending_tx_skb = NULL;
262                 dev->stats.tx_errors++;
263                 dev->stats.tx_aborted_errors++;
264         }
265 }
266 
267 /*
268  * Enable Interrupts, Receive, and Transmit
269  */
270 static void smc911x_enable(struct net_device *dev)
271 {
272         struct smc911x_local *lp = netdev_priv(dev);
273         unsigned mask, cfg, cr;
274         unsigned long flags;
275 
276         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
277 
278         spin_lock_irqsave(&lp->lock, flags);
279 
280         SMC_SET_MAC_ADDR(lp, dev->dev_addr);
281 
282         /* Enable TX */
283         cfg = SMC_GET_HW_CFG(lp);
284         cfg &= HW_CFG_TX_FIF_SZ_ | 0xFFF;
285         cfg |= HW_CFG_SF_;
286         SMC_SET_HW_CFG(lp, cfg);
287         SMC_SET_FIFO_TDA(lp, 0xFF);
288         /* Update TX stats on every 64 packets received or every 1 sec */
289         SMC_SET_FIFO_TSL(lp, 64);
290         SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
291 
292         SMC_GET_MAC_CR(lp, cr);
293         cr |= MAC_CR_TXEN_ | MAC_CR_HBDIS_;
294         SMC_SET_MAC_CR(lp, cr);
295         SMC_SET_TX_CFG(lp, TX_CFG_TX_ON_);
296 
297         /* Add 2 byte padding to start of packets */
298         SMC_SET_RX_CFG(lp, (2<<8) & RX_CFG_RXDOFF_);
299 
300         /* Turn on receiver and enable RX */
301         if (cr & MAC_CR_RXEN_)
302                 DBG(SMC_DEBUG_RX, dev, "Receiver already enabled\n");
303 
304         SMC_SET_MAC_CR(lp, cr | MAC_CR_RXEN_);
305 
306         /* Interrupt on every received packet */
307         SMC_SET_FIFO_RSA(lp, 0x01);
308         SMC_SET_FIFO_RSL(lp, 0x00);
309 
310         /* now, enable interrupts */
311         mask = INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_ | INT_EN_RSFL_EN_ |
312                 INT_EN_GPT_INT_EN_ | INT_EN_RXDFH_INT_EN_ | INT_EN_RXE_EN_ |
313                 INT_EN_PHY_INT_EN_;
314         if (IS_REV_A(lp->revision))
315                 mask|=INT_EN_RDFL_EN_;
316         else {
317                 mask|=INT_EN_RDFO_EN_;
318         }
319         SMC_ENABLE_INT(lp, mask);
320 
321         spin_unlock_irqrestore(&lp->lock, flags);
322 }
323 
324 /*
325  * this puts the device in an inactive state
326  */
327 static void smc911x_shutdown(struct net_device *dev)
328 {
329         struct smc911x_local *lp = netdev_priv(dev);
330         unsigned cr;
331         unsigned long flags;
332 
333         DBG(SMC_DEBUG_FUNC, dev, "%s: --> %s\n", CARDNAME, __func__);
334 
335         /* Disable IRQ's */
336         SMC_SET_INT_EN(lp, 0);
337 
338         /* Turn of Rx and TX */
339         spin_lock_irqsave(&lp->lock, flags);
340         SMC_GET_MAC_CR(lp, cr);
341         cr &= ~(MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
342         SMC_SET_MAC_CR(lp, cr);
343         SMC_SET_TX_CFG(lp, TX_CFG_STOP_TX_);
344         spin_unlock_irqrestore(&lp->lock, flags);
345 }
346 
347 static inline void smc911x_drop_pkt(struct net_device *dev)
348 {
349         struct smc911x_local *lp = netdev_priv(dev);
350         unsigned int fifo_count, timeout, reg;
351 
352         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, dev, "%s: --> %s\n",
353             CARDNAME, __func__);
354         fifo_count = SMC_GET_RX_FIFO_INF(lp) & 0xFFFF;
355         if (fifo_count <= 4) {
356                 /* Manually dump the packet data */
357                 while (fifo_count--)
358                         SMC_GET_RX_FIFO(lp);
359         } else   {
360                 /* Fast forward through the bad packet */
361                 SMC_SET_RX_DP_CTRL(lp, RX_DP_CTRL_FFWD_BUSY_);
362                 timeout=50;
363                 do {
364                         udelay(10);
365                         reg = SMC_GET_RX_DP_CTRL(lp) & RX_DP_CTRL_FFWD_BUSY_;
366                 } while (--timeout && reg);
367                 if (timeout == 0) {
368                         PRINTK(dev, "timeout waiting for RX fast forward\n");
369                 }
370         }
371 }
372 
373 /*
374  * This is the procedure to handle the receipt of a packet.
375  * It should be called after checking for packet presence in
376  * the RX status FIFO.   It must be called with the spin lock
377  * already held.
378  */
379 static inline void       smc911x_rcv(struct net_device *dev)
380 {
381         struct smc911x_local *lp = netdev_priv(dev);
382         unsigned int pkt_len, status;
383         struct sk_buff *skb;
384         unsigned char *data;
385 
386         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, dev, "--> %s\n",
387             __func__);
388         status = SMC_GET_RX_STS_FIFO(lp);
389         DBG(SMC_DEBUG_RX, dev, "Rx pkt len %d status 0x%08x\n",
390             (status & 0x3fff0000) >> 16, status & 0xc000ffff);
391         pkt_len = (status & RX_STS_PKT_LEN_) >> 16;
392         if (status & RX_STS_ES_) {
393                 /* Deal with a bad packet */
394                 dev->stats.rx_errors++;
395                 if (status & RX_STS_CRC_ERR_)
396                         dev->stats.rx_crc_errors++;
397                 else {
398                         if (status & RX_STS_LEN_ERR_)
399                                 dev->stats.rx_length_errors++;
400                         if (status & RX_STS_MCAST_)
401                                 dev->stats.multicast++;
402                 }
403                 /* Remove the bad packet data from the RX FIFO */
404                 smc911x_drop_pkt(dev);
405         } else {
406                 /* Receive a valid packet */
407                 /* Alloc a buffer with extra room for DMA alignment */
408                 skb = netdev_alloc_skb(dev, pkt_len+32);
409                 if (unlikely(skb == NULL)) {
410                         PRINTK(dev, "Low memory, rcvd packet dropped.\n");
411                         dev->stats.rx_dropped++;
412                         smc911x_drop_pkt(dev);
413                         return;
414                 }
415                 /* Align IP header to 32 bits
416                  * Note that the device is configured to add a 2
417                  * byte padding to the packet start, so we really
418                  * want to write to the orignal data pointer */
419                 data = skb->data;
420                 skb_reserve(skb, 2);
421                 skb_put(skb,pkt_len-4);
422 #ifdef SMC_USE_DMA
423                 {
424                 unsigned int fifo;
425                 /* Lower the FIFO threshold if possible */
426                 fifo = SMC_GET_FIFO_INT(lp);
427                 if (fifo & 0xFF) fifo--;
428                 DBG(SMC_DEBUG_RX, dev, "Setting RX stat FIFO threshold to %d\n",
429                     fifo & 0xff);
430                 SMC_SET_FIFO_INT(lp, fifo);
431                 /* Setup RX DMA */
432                 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN16_ | ((2<<8) & RX_CFG_RXDOFF_));
433                 lp->rxdma_active = 1;
434                 lp->current_rx_skb = skb;
435                 SMC_PULL_DATA(lp, data, (pkt_len+2+15) & ~15);
436                 /* Packet processing deferred to DMA RX interrupt */
437                 }
438 #else
439                 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN4_ | ((2<<8) & RX_CFG_RXDOFF_));
440                 SMC_PULL_DATA(lp, data, pkt_len+2+3);
441 
442                 DBG(SMC_DEBUG_PKTS, dev, "Received packet\n");
443                 PRINT_PKT(data, ((pkt_len - 4) <= 64) ? pkt_len - 4 : 64);
444                 skb->protocol = eth_type_trans(skb, dev);
445                 netif_rx(skb);
446                 dev->stats.rx_packets++;
447                 dev->stats.rx_bytes += pkt_len-4;
448 #endif
449         }
450 }
451 
452 /*
453  * This is called to actually send a packet to the chip.
454  */
455 static void smc911x_hardware_send_pkt(struct net_device *dev)
456 {
457         struct smc911x_local *lp = netdev_priv(dev);
458         struct sk_buff *skb;
459         unsigned int cmdA, cmdB, len;
460         unsigned char *buf;
461 
462         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n", __func__);
463         BUG_ON(lp->pending_tx_skb == NULL);
464 
465         skb = lp->pending_tx_skb;
466         lp->pending_tx_skb = NULL;
467 
468         /* cmdA {25:24] data alignment [20:16] start offset [10:0] buffer length */
469         /* cmdB {31:16] pkt tag [10:0] length */
470 #ifdef SMC_USE_DMA
471         /* 16 byte buffer alignment mode */
472         buf = (char*)((u32)(skb->data) & ~0xF);
473         len = (skb->len + 0xF + ((u32)skb->data & 0xF)) & ~0xF;
474         cmdA = (1<<24) | (((u32)skb->data & 0xF)<<16) |
475                         TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
476                         skb->len;
477 #else
478         buf = (char*)((u32)skb->data & ~0x3);
479         len = (skb->len + 3 + ((u32)skb->data & 3)) & ~0x3;
480         cmdA = (((u32)skb->data & 0x3) << 16) |
481                         TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
482                         skb->len;
483 #endif
484         /* tag is packet length so we can use this in stats update later */
485         cmdB = (skb->len  << 16) | (skb->len & 0x7FF);
486 
487         DBG(SMC_DEBUG_TX, dev, "TX PKT LENGTH 0x%04x (%d) BUF 0x%p CMDA 0x%08x CMDB 0x%08x\n",
488             len, len, buf, cmdA, cmdB);
489         SMC_SET_TX_FIFO(lp, cmdA);
490         SMC_SET_TX_FIFO(lp, cmdB);
491 
492         DBG(SMC_DEBUG_PKTS, dev, "Transmitted packet\n");
493         PRINT_PKT(buf, len <= 64 ? len : 64);
494 
495         /* Send pkt via PIO or DMA */
496 #ifdef SMC_USE_DMA
497         lp->current_tx_skb = skb;
498         SMC_PUSH_DATA(lp, buf, len);
499         /* DMA complete IRQ will free buffer and set jiffies */
500 #else
501         SMC_PUSH_DATA(lp, buf, len);
502         dev->trans_start = jiffies;
503         dev_kfree_skb_irq(skb);
504 #endif
505         if (!lp->tx_throttle) {
506                 netif_wake_queue(dev);
507         }
508         SMC_ENABLE_INT(lp, INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_);
509 }
510 
511 /*
512  * Since I am not sure if I will have enough room in the chip's ram
513  * to store the packet, I call this routine which either sends it
514  * now, or set the card to generates an interrupt when ready
515  * for the packet.
516  */
517 static int smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
518 {
519         struct smc911x_local *lp = netdev_priv(dev);
520         unsigned int free;
521         unsigned long flags;
522 
523         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
524             __func__);
525 
526         spin_lock_irqsave(&lp->lock, flags);
527 
528         BUG_ON(lp->pending_tx_skb != NULL);
529 
530         free = SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TDFREE_;
531         DBG(SMC_DEBUG_TX, dev, "TX free space %d\n", free);
532 
533         /* Turn off the flow when running out of space in FIFO */
534         if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
535                 DBG(SMC_DEBUG_TX, dev, "Disabling data flow due to low FIFO space (%d)\n",
536                     free);
537                 /* Reenable when at least 1 packet of size MTU present */
538                 SMC_SET_FIFO_TDA(lp, (SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
539                 lp->tx_throttle = 1;
540                 netif_stop_queue(dev);
541         }
542 
543         /* Drop packets when we run out of space in TX FIFO
544          * Account for overhead required for:
545          *
546          *        Tx command words                       8 bytes
547          *        Start offset                           15 bytes
548          *        End padding                            15 bytes
549          */
550         if (unlikely(free < (skb->len + 8 + 15 + 15))) {
551                 netdev_warn(dev, "No Tx free space %d < %d\n",
552                             free, skb->len);
553                 lp->pending_tx_skb = NULL;
554                 dev->stats.tx_errors++;
555                 dev->stats.tx_dropped++;
556                 spin_unlock_irqrestore(&lp->lock, flags);
557                 dev_kfree_skb_any(skb);
558                 return NETDEV_TX_OK;
559         }
560 
561 #ifdef SMC_USE_DMA
562         {
563                 /* If the DMA is already running then defer this packet Tx until
564                  * the DMA IRQ starts it
565                  */
566                 if (lp->txdma_active) {
567                         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Tx DMA running, deferring packet\n");
568                         lp->pending_tx_skb = skb;
569                         netif_stop_queue(dev);
570                         spin_unlock_irqrestore(&lp->lock, flags);
571                         return NETDEV_TX_OK;
572                 } else {
573                         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Activating Tx DMA\n");
574                         lp->txdma_active = 1;
575                 }
576         }
577 #endif
578         lp->pending_tx_skb = skb;
579         smc911x_hardware_send_pkt(dev);
580         spin_unlock_irqrestore(&lp->lock, flags);
581 
582         return NETDEV_TX_OK;
583 }
584 
585 /*
586  * This handles a TX status interrupt, which is only called when:
587  * - a TX error occurred, or
588  * - TX of a packet completed.
589  */
590 static void smc911x_tx(struct net_device *dev)
591 {
592         struct smc911x_local *lp = netdev_priv(dev);
593         unsigned int tx_status;
594 
595         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
596             __func__);
597 
598         /* Collect the TX status */
599         while (((SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
600                 DBG(SMC_DEBUG_TX, dev, "Tx stat FIFO used 0x%04x\n",
601                     (SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16);
602                 tx_status = SMC_GET_TX_STS_FIFO(lp);
603                 dev->stats.tx_packets++;
604                 dev->stats.tx_bytes+=tx_status>>16;
605                 DBG(SMC_DEBUG_TX, dev, "Tx FIFO tag 0x%04x status 0x%04x\n",
606                     (tx_status & 0xffff0000) >> 16,
607                     tx_status & 0x0000ffff);
608                 /* count Tx errors, but ignore lost carrier errors when in
609                  * full-duplex mode */
610                 if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
611                     !(tx_status & 0x00000306))) {
612                         dev->stats.tx_errors++;
613                 }
614                 if (tx_status & TX_STS_MANY_COLL_) {
615                         dev->stats.collisions+=16;
616                         dev->stats.tx_aborted_errors++;
617                 } else {
618                         dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
619                 }
620                 /* carrier error only has meaning for half-duplex communication */
621                 if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
622                     !lp->ctl_rfduplx) {
623                         dev->stats.tx_carrier_errors++;
624                 }
625                 if (tx_status & TX_STS_LATE_COLL_) {
626                         dev->stats.collisions++;
627                         dev->stats.tx_aborted_errors++;
628                 }
629         }
630 }
631 
632 
633 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
634 /*
635  * Reads a register from the MII Management serial interface
636  */
637 
638 static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
639 {
640         struct smc911x_local *lp = netdev_priv(dev);
641         unsigned int phydata;
642 
643         SMC_GET_MII(lp, phyreg, phyaddr, phydata);
644 
645         DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
646             __func__, phyaddr, phyreg, phydata);
647         return phydata;
648 }
649 
650 
651 /*
652  * Writes a register to the MII Management serial interface
653  */
654 static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
655                         int phydata)
656 {
657         struct smc911x_local *lp = netdev_priv(dev);
658 
659         DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
660             __func__, phyaddr, phyreg, phydata);
661 
662         SMC_SET_MII(lp, phyreg, phyaddr, phydata);
663 }
664 
665 /*
666  * Finds and reports the PHY address (115 and 117 have external
667  * PHY interface 118 has internal only
668  */
669 static void smc911x_phy_detect(struct net_device *dev)
670 {
671         struct smc911x_local *lp = netdev_priv(dev);
672         int phyaddr;
673         unsigned int cfg, id1, id2;
674 
675         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
676 
677         lp->phy_type = 0;
678 
679         /*
680          * Scan all 32 PHY addresses if necessary, starting at
681          * PHY#1 to PHY#31, and then PHY#0 last.
682          */
683         switch(lp->version) {
684                 case CHIP_9115:
685                 case CHIP_9117:
686                 case CHIP_9215:
687                 case CHIP_9217:
688                         cfg = SMC_GET_HW_CFG(lp);
689                         if (cfg & HW_CFG_EXT_PHY_DET_) {
690                                 cfg &= ~HW_CFG_PHY_CLK_SEL_;
691                                 cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
692                                 SMC_SET_HW_CFG(lp, cfg);
693                                 udelay(10); /* Wait for clocks to stop */
694 
695                                 cfg |= HW_CFG_EXT_PHY_EN_;
696                                 SMC_SET_HW_CFG(lp, cfg);
697                                 udelay(10); /* Wait for clocks to stop */
698 
699                                 cfg &= ~HW_CFG_PHY_CLK_SEL_;
700                                 cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
701                                 SMC_SET_HW_CFG(lp, cfg);
702                                 udelay(10); /* Wait for clocks to stop */
703 
704                                 cfg |= HW_CFG_SMI_SEL_;
705                                 SMC_SET_HW_CFG(lp, cfg);
706 
707                                 for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
708 
709                                         /* Read the PHY identifiers */
710                                         SMC_GET_PHY_ID1(lp, phyaddr & 31, id1);
711                                         SMC_GET_PHY_ID2(lp, phyaddr & 31, id2);
712 
713                                         /* Make sure it is a valid identifier */
714                                         if (id1 != 0x0000 && id1 != 0xffff &&
715                                             id1 != 0x8000 && id2 != 0x0000 &&
716                                             id2 != 0xffff && id2 != 0x8000) {
717                                                 /* Save the PHY's address */
718                                                 lp->mii.phy_id = phyaddr & 31;
719                                                 lp->phy_type = id1 << 16 | id2;
720                                                 break;
721                                         }
722                                 }
723                                 if (phyaddr < 32)
724                                         /* Found an external PHY */
725                                         break;
726                         }
727                 default:
728                         /* Internal media only */
729                         SMC_GET_PHY_ID1(lp, 1, id1);
730                         SMC_GET_PHY_ID2(lp, 1, id2);
731                         /* Save the PHY's address */
732                         lp->mii.phy_id = 1;
733                         lp->phy_type = id1 << 16 | id2;
734         }
735 
736         DBG(SMC_DEBUG_MISC, dev, "phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%x\n",
737             id1, id2, lp->mii.phy_id);
738 }
739 
740 /*
741  * Sets the PHY to a configuration as determined by the user.
742  * Called with spin_lock held.
743  */
744 static int smc911x_phy_fixed(struct net_device *dev)
745 {
746         struct smc911x_local *lp = netdev_priv(dev);
747         int phyaddr = lp->mii.phy_id;
748         int bmcr;
749 
750         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
751 
752         /* Enter Link Disable state */
753         SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
754         bmcr |= BMCR_PDOWN;
755         SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
756 
757         /*
758          * Set our fixed capabilities
759          * Disable auto-negotiation
760          */
761         bmcr &= ~BMCR_ANENABLE;
762         if (lp->ctl_rfduplx)
763                 bmcr |= BMCR_FULLDPLX;
764 
765         if (lp->ctl_rspeed == 100)
766                 bmcr |= BMCR_SPEED100;
767 
768         /* Write our capabilities to the phy control register */
769         SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
770 
771         /* Re-Configure the Receive/Phy Control register */
772         bmcr &= ~BMCR_PDOWN;
773         SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
774 
775         return 1;
776 }
777 
778 /**
779  * smc911x_phy_reset - reset the phy
780  * @dev: net device
781  * @phy: phy address
782  *
783  * Issue a software reset for the specified PHY and
784  * wait up to 100ms for the reset to complete.   We should
785  * not access the PHY for 50ms after issuing the reset.
786  *
787  * The time to wait appears to be dependent on the PHY.
788  *
789  */
790 static int smc911x_phy_reset(struct net_device *dev, int phy)
791 {
792         struct smc911x_local *lp = netdev_priv(dev);
793         int timeout;
794         unsigned long flags;
795         unsigned int reg;
796 
797         DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
798 
799         spin_lock_irqsave(&lp->lock, flags);
800         reg = SMC_GET_PMT_CTRL(lp);
801         reg &= ~0xfffff030;
802         reg |= PMT_CTRL_PHY_RST_;
803         SMC_SET_PMT_CTRL(lp, reg);
804         spin_unlock_irqrestore(&lp->lock, flags);
805         for (timeout = 2; timeout; timeout--) {
806                 msleep(50);
807                 spin_lock_irqsave(&lp->lock, flags);
808                 reg = SMC_GET_PMT_CTRL(lp);
809                 spin_unlock_irqrestore(&lp->lock, flags);
810                 if (!(reg & PMT_CTRL_PHY_RST_)) {
811                         /* extra delay required because the phy may
812                          * not be completed with its reset
813                          * when PHY_BCR_RESET_ is cleared. 256us
814                          * should suffice, but use 500us to be safe
815                          */
816                         udelay(500);
817                 break;
818                 }
819         }
820 
821         return reg & PMT_CTRL_PHY_RST_;
822 }
823 
824 /**
825  * smc911x_phy_powerdown - powerdown phy
826  * @dev: net device
827  * @phy: phy address
828  *
829  * Power down the specified PHY
830  */
831 static void smc911x_phy_powerdown(struct net_device *dev, int phy)
832 {
833         struct smc911x_local *lp = netdev_priv(dev);
834         unsigned int bmcr;
835 
836         /* Enter Link Disable state */
837         SMC_GET_PHY_BMCR(lp, phy, bmcr);
838         bmcr |= BMCR_PDOWN;
839         SMC_SET_PHY_BMCR(lp, phy, bmcr);
840 }
841 
842 /**
843  * smc911x_phy_check_media - check the media status and adjust BMCR
844  * @dev: net device
845  * @init: set true for initialisation
846  *
847  * Select duplex mode depending on negotiation state.   This
848  * also updates our carrier state.
849  */
850 static void smc911x_phy_check_media(struct net_device *dev, int init)
851 {
852         struct smc911x_local *lp = netdev_priv(dev);
853         int phyaddr = lp->mii.phy_id;
854         unsigned int bmcr, cr;
855 
856         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
857 
858         if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
859                 /* duplex state has changed */
860                 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
861                 SMC_GET_MAC_CR(lp, cr);
862                 if (lp->mii.full_duplex) {
863                         DBG(SMC_DEBUG_MISC, dev, "Configuring for full-duplex mode\n");
864                         bmcr |= BMCR_FULLDPLX;
865                         cr |= MAC_CR_RCVOWN_;
866                 } else {
867                         DBG(SMC_DEBUG_MISC, dev, "Configuring for half-duplex mode\n");
868                         bmcr &= ~BMCR_FULLDPLX;
869                         cr &= ~MAC_CR_RCVOWN_;
870                 }
871                 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
872                 SMC_SET_MAC_CR(lp, cr);
873         }
874 }
875 
876 /*
877  * Configures the specified PHY through the MII management interface
878  * using Autonegotiation.
879  * Calls smc911x_phy_fixed() if the user has requested a certain config.
880  * If RPC ANEG bit is set, the media selection is dependent purely on
881  * the selection by the MII (either in the MII BMCR reg or the result
882  * of autonegotiation.)  If the RPC ANEG bit is cleared, the selection
883  * is controlled by the RPC SPEED and RPC DPLX bits.
884  */
885 static void smc911x_phy_configure(struct work_struct *work)
886 {
887         struct smc911x_local *lp = container_of(work, struct smc911x_local,
888                                                 phy_configure);
889         struct net_device *dev = lp->netdev;
890         int phyaddr = lp->mii.phy_id;
891         int my_phy_caps; /* My PHY capabilities */
892         int my_ad_caps; /* My Advertised capabilities */
893         int status;
894         unsigned long flags;
895 
896         DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
897 
898         /*
899          * We should not be called if phy_type is zero.
900          */
901         if (lp->phy_type == 0)
902                 return;
903 
904         if (smc911x_phy_reset(dev, phyaddr)) {
905                 netdev_info(dev, "PHY reset timed out\n");
906                 return;
907         }
908         spin_lock_irqsave(&lp->lock, flags);
909 
910         /*
911          * Enable PHY Interrupts (for register 18)
912          * Interrupts listed here are enabled
913          */
914         SMC_SET_PHY_INT_MASK(lp, phyaddr, PHY_INT_MASK_ENERGY_ON_ |
915                  PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
916                  PHY_INT_MASK_LINK_DOWN_);
917 
918         /* If the user requested no auto neg, then go set his request */
919         if (lp->mii.force_media) {
920                 smc911x_phy_fixed(dev);
921                 goto smc911x_phy_configure_exit;
922         }
923 
924         /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
925         SMC_GET_PHY_BMSR(lp, phyaddr, my_phy_caps);
926         if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
927                 netdev_info(dev, "Auto negotiation NOT supported\n");
928                 smc911x_phy_fixed(dev);
929                 goto smc911x_phy_configure_exit;
930         }
931 
932         /* CSMA capable w/ both pauses */
933         my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
934 
935         if (my_phy_caps & BMSR_100BASE4)
936                 my_ad_caps |= ADVERTISE_100BASE4;
937         if (my_phy_caps & BMSR_100FULL)
938                 my_ad_caps |= ADVERTISE_100FULL;
939         if (my_phy_caps & BMSR_100HALF)
940                 my_ad_caps |= ADVERTISE_100HALF;
941         if (my_phy_caps & BMSR_10FULL)
942                 my_ad_caps |= ADVERTISE_10FULL;
943         if (my_phy_caps & BMSR_10HALF)
944                 my_ad_caps |= ADVERTISE_10HALF;
945 
946         /* Disable capabilities not selected by our user */
947         if (lp->ctl_rspeed != 100)
948                 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
949 
950          if (!lp->ctl_rfduplx)
951                 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
952 
953         /* Update our Auto-Neg Advertisement Register */
954         SMC_SET_PHY_MII_ADV(lp, phyaddr, my_ad_caps);
955         lp->mii.advertising = my_ad_caps;
956 
957         /*
958          * Read the register back.       Without this, it appears that when
959          * auto-negotiation is restarted, sometimes it isn't ready and
960          * the link does not come up.
961          */
962         udelay(10);
963         SMC_GET_PHY_MII_ADV(lp, phyaddr, status);
964 
965         DBG(SMC_DEBUG_MISC, dev, "phy caps=0x%04x\n", my_phy_caps);
966         DBG(SMC_DEBUG_MISC, dev, "phy advertised caps=0x%04x\n", my_ad_caps);
967 
968         /* Restart auto-negotiation process in order to advertise my caps */
969         SMC_SET_PHY_BMCR(lp, phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
970 
971         smc911x_phy_check_media(dev, 1);
972 
973 smc911x_phy_configure_exit:
974         spin_unlock_irqrestore(&lp->lock, flags);
975 }
976 
977 /*
978  * smc911x_phy_interrupt
979  *
980  * Purpose:  Handle interrupts relating to PHY register 18. This is
981  *       called from the "hard" interrupt handler under our private spinlock.
982  */
983 static void smc911x_phy_interrupt(struct net_device *dev)
984 {
985         struct smc911x_local *lp = netdev_priv(dev);
986         int phyaddr = lp->mii.phy_id;
987         int status;
988 
989         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
990 
991         if (lp->phy_type == 0)
992                 return;
993 
994         smc911x_phy_check_media(dev, 0);
995         /* read to clear status bits */
996         SMC_GET_PHY_INT_SRC(lp, phyaddr,status);
997         DBG(SMC_DEBUG_MISC, dev, "PHY interrupt status 0x%04x\n",
998             status & 0xffff);
999         DBG(SMC_DEBUG_MISC, dev, "AFC_CFG 0x%08x\n",
1000             SMC_GET_AFC_CFG(lp));
1001 }
1002 
1003 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1004 
1005 /*
1006  * This is the main routine of the driver, to handle the device when
1007  * it needs some attention.
1008  */
1009 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1010 {
1011         struct net_device *dev = dev_id;
1012         struct smc911x_local *lp = netdev_priv(dev);
1013         unsigned int status, mask, timeout;
1014         unsigned int rx_overrun=0, cr, pkts;
1015         unsigned long flags;
1016 
1017         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1018 
1019         spin_lock_irqsave(&lp->lock, flags);
1020 
1021         /* Spurious interrupt check */
1022         if ((SMC_GET_IRQ_CFG(lp) & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1023                 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1024                 spin_unlock_irqrestore(&lp->lock, flags);
1025                 return IRQ_NONE;
1026         }
1027 
1028         mask = SMC_GET_INT_EN(lp);
1029         SMC_SET_INT_EN(lp, 0);
1030 
1031         /* set a timeout value, so I don't stay here forever */
1032         timeout = 8;
1033 
1034 
1035         do {
1036                 status = SMC_GET_INT(lp);
1037 
1038                 DBG(SMC_DEBUG_MISC, dev, "INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1039                     status, mask, status & ~mask);
1040 
1041                 status &= mask;
1042                 if (!status)
1043                         break;
1044 
1045                 /* Handle SW interrupt condition */
1046                 if (status & INT_STS_SW_INT_) {
1047                         SMC_ACK_INT(lp, INT_STS_SW_INT_);
1048                         mask &= ~INT_EN_SW_INT_EN_;
1049                 }
1050                 /* Handle various error conditions */
1051                 if (status & INT_STS_RXE_) {
1052                         SMC_ACK_INT(lp, INT_STS_RXE_);
1053                         dev->stats.rx_errors++;
1054                 }
1055                 if (status & INT_STS_RXDFH_INT_) {
1056                         SMC_ACK_INT(lp, INT_STS_RXDFH_INT_);
1057                         dev->stats.rx_dropped+=SMC_GET_RX_DROP(lp);
1058                  }
1059                 /* Undocumented interrupt-what is the right thing to do here? */
1060                 if (status & INT_STS_RXDF_INT_) {
1061                         SMC_ACK_INT(lp, INT_STS_RXDF_INT_);
1062                 }
1063 
1064                 /* Rx Data FIFO exceeds set level */
1065                 if (status & INT_STS_RDFL_) {
1066                         if (IS_REV_A(lp->revision)) {
1067                                 rx_overrun=1;
1068                                 SMC_GET_MAC_CR(lp, cr);
1069                                 cr &= ~MAC_CR_RXEN_;
1070                                 SMC_SET_MAC_CR(lp, cr);
1071                                 DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1072                                 dev->stats.rx_errors++;
1073                                 dev->stats.rx_fifo_errors++;
1074                         }
1075                         SMC_ACK_INT(lp, INT_STS_RDFL_);
1076                 }
1077                 if (status & INT_STS_RDFO_) {
1078                         if (!IS_REV_A(lp->revision)) {
1079                                 SMC_GET_MAC_CR(lp, cr);
1080                                 cr &= ~MAC_CR_RXEN_;
1081                                 SMC_SET_MAC_CR(lp, cr);
1082                                 rx_overrun=1;
1083                                 DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1084                                 dev->stats.rx_errors++;
1085                                 dev->stats.rx_fifo_errors++;
1086                         }
1087                         SMC_ACK_INT(lp, INT_STS_RDFO_);
1088                 }
1089                 /* Handle receive condition */
1090                 if ((status & INT_STS_RSFL_) || rx_overrun) {
1091                         unsigned int fifo;
1092                         DBG(SMC_DEBUG_RX, dev, "RX irq\n");
1093                         fifo = SMC_GET_RX_FIFO_INF(lp);
1094                         pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1095                         DBG(SMC_DEBUG_RX, dev, "Rx FIFO pkts %d, bytes %d\n",
1096                             pkts, fifo & 0xFFFF);
1097                         if (pkts != 0) {
1098 #ifdef SMC_USE_DMA
1099                                 unsigned int fifo;
1100                                 if (lp->rxdma_active){
1101                                         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1102                                             "RX DMA active\n");
1103                                         /* The DMA is already running so up the IRQ threshold */
1104                                         fifo = SMC_GET_FIFO_INT(lp) & ~0xFF;
1105                                         fifo |= pkts & 0xFF;
1106                                         DBG(SMC_DEBUG_RX, dev,
1107                                             "Setting RX stat FIFO threshold to %d\n",
1108                                             fifo & 0xff);
1109                                         SMC_SET_FIFO_INT(lp, fifo);
1110                                 } else
1111 #endif
1112                                 smc911x_rcv(dev);
1113                         }
1114                         SMC_ACK_INT(lp, INT_STS_RSFL_);
1115                 }
1116                 /* Handle transmit FIFO available */
1117                 if (status & INT_STS_TDFA_) {
1118                         DBG(SMC_DEBUG_TX, dev, "TX data FIFO space available irq\n");
1119                         SMC_SET_FIFO_TDA(lp, 0xFF);
1120                         lp->tx_throttle = 0;
1121 #ifdef SMC_USE_DMA
1122                         if (!lp->txdma_active)
1123 #endif
1124                                 netif_wake_queue(dev);
1125                         SMC_ACK_INT(lp, INT_STS_TDFA_);
1126                 }
1127                 /* Handle transmit done condition */
1128 #if 1
1129                 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1130                         DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC, dev,
1131                             "Tx stat FIFO limit (%d) /GPT irq\n",
1132                             (SMC_GET_FIFO_INT(lp) & 0x00ff0000) >> 16);
1133                         smc911x_tx(dev);
1134                         SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1135                         SMC_ACK_INT(lp, INT_STS_TSFL_);
1136                         SMC_ACK_INT(lp, INT_STS_TSFL_ | INT_STS_GPT_INT_);
1137                 }
1138 #else
1139                 if (status & INT_STS_TSFL_) {
1140                         DBG(SMC_DEBUG_TX, dev, "TX status FIFO limit (%d) irq\n", ?);
1141                         smc911x_tx(dev);
1142                         SMC_ACK_INT(lp, INT_STS_TSFL_);
1143                 }
1144 
1145                 if (status & INT_STS_GPT_INT_) {
1146                         DBG(SMC_DEBUG_RX, dev, "IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1147                             SMC_GET_IRQ_CFG(lp),
1148                             SMC_GET_FIFO_INT(lp),
1149                             SMC_GET_RX_CFG(lp));
1150                         DBG(SMC_DEBUG_RX, dev, "Rx Stat FIFO Used 0x%02x Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1151                             (SMC_GET_RX_FIFO_INF(lp) & 0x00ff0000) >> 16,
1152                             SMC_GET_RX_FIFO_INF(lp) & 0xffff,
1153                             SMC_GET_RX_STS_FIFO_PEEK(lp));
1154                         SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1155                         SMC_ACK_INT(lp, INT_STS_GPT_INT_);
1156                 }
1157 #endif
1158 
1159                 /* Handle PHY interrupt condition */
1160                 if (status & INT_STS_PHY_INT_) {
1161                         DBG(SMC_DEBUG_MISC, dev, "PHY irq\n");
1162                         smc911x_phy_interrupt(dev);
1163                         SMC_ACK_INT(lp, INT_STS_PHY_INT_);
1164                 }
1165         } while (--timeout);
1166 
1167         /* restore mask state */
1168         SMC_SET_INT_EN(lp, mask);
1169 
1170         DBG(SMC_DEBUG_MISC, dev, "Interrupt done (%d loops)\n",
1171             8-timeout);
1172 
1173         spin_unlock_irqrestore(&lp->lock, flags);
1174 
1175         return IRQ_HANDLED;
1176 }
1177 
1178 #ifdef SMC_USE_DMA
1179 static void
1180 smc911x_tx_dma_irq(void *data)
1181 {
1182         struct smc911x_local *lp = data;
1183         struct net_device *dev = lp->netdev;
1184         struct sk_buff *skb = lp->current_tx_skb;
1185         unsigned long flags;
1186 
1187         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1188 
1189         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "TX DMA irq handler\n");
1190         BUG_ON(skb == NULL);
1191         dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1192         dev->trans_start = jiffies;
1193         dev_kfree_skb_irq(skb);
1194         lp->current_tx_skb = NULL;
1195         if (lp->pending_tx_skb != NULL)
1196                 smc911x_hardware_send_pkt(dev);
1197         else {
1198                 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev,
1199                     "No pending Tx packets. DMA disabled\n");
1200                 spin_lock_irqsave(&lp->lock, flags);
1201                 lp->txdma_active = 0;
1202                 if (!lp->tx_throttle) {
1203                         netif_wake_queue(dev);
1204                 }
1205                 spin_unlock_irqrestore(&lp->lock, flags);
1206         }
1207 
1208         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev,
1209             "TX DMA irq completed\n");
1210 }
1211 static void
1212 smc911x_rx_dma_irq(void *data)
1213 {
1214         struct smc911x_local *lp = data;
1215         struct net_device *dev = lp->netdev;
1216         struct sk_buff *skb = lp->current_rx_skb;
1217         unsigned long flags;
1218         unsigned int pkts;
1219 
1220         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1221         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev, "RX DMA irq handler\n");
1222         dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1223         BUG_ON(skb == NULL);
1224         lp->current_rx_skb = NULL;
1225         PRINT_PKT(skb->data, skb->len);
1226         skb->protocol = eth_type_trans(skb, dev);
1227         dev->stats.rx_packets++;
1228         dev->stats.rx_bytes += skb->len;
1229         netif_rx(skb);
1230 
1231         spin_lock_irqsave(&lp->lock, flags);
1232         pkts = (SMC_GET_RX_FIFO_INF(lp) & RX_FIFO_INF_RXSUSED_) >> 16;
1233         if (pkts != 0) {
1234                 smc911x_rcv(dev);
1235         }else {
1236                 lp->rxdma_active = 0;
1237         }
1238         spin_unlock_irqrestore(&lp->lock, flags);
1239         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1240             "RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1241             pkts);
1242 }
1243 #endif   /* SMC_USE_DMA */
1244 
1245 #ifdef CONFIG_NET_POLL_CONTROLLER
1246 /*
1247  * Polling receive - used by netconsole and other diagnostic tools
1248  * to allow network i/o with interrupts disabled.
1249  */
1250 static void smc911x_poll_controller(struct net_device *dev)
1251 {
1252         disable_irq(dev->irq);
1253         smc911x_interrupt(dev->irq, dev);
1254         enable_irq(dev->irq);
1255 }
1256 #endif
1257 
1258 /* Our watchdog timed out. Called by the networking layer */
1259 static void smc911x_timeout(struct net_device *dev)
1260 {
1261         struct smc911x_local *lp = netdev_priv(dev);
1262         int status, mask;
1263         unsigned long flags;
1264 
1265         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1266 
1267         spin_lock_irqsave(&lp->lock, flags);
1268         status = SMC_GET_INT(lp);
1269         mask = SMC_GET_INT_EN(lp);
1270         spin_unlock_irqrestore(&lp->lock, flags);
1271         DBG(SMC_DEBUG_MISC, dev, "INT 0x%02x MASK 0x%02x\n",
1272             status, mask);
1273 
1274         /* Dump the current TX FIFO contents and restart */
1275         mask = SMC_GET_TX_CFG(lp);
1276         SMC_SET_TX_CFG(lp, mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1277         /*
1278          * Reconfiguring the PHY doesn't seem like a bad idea here, but
1279          * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1280          * which calls schedule().       Hence we use a work queue.
1281          */
1282         if (lp->phy_type != 0)
1283                 schedule_work(&lp->phy_configure);
1284 
1285         /* We can accept TX packets again */
1286         dev->trans_start = jiffies; /* prevent tx timeout */
1287         netif_wake_queue(dev);
1288 }
1289 
1290 /*
1291  * This routine will, depending on the values passed to it,
1292  * either make it accept multicast packets, go into
1293  * promiscuous mode (for TCPDUMP and cousins) or accept
1294  * a select set of multicast packets
1295  */
1296 static void smc911x_set_multicast_list(struct net_device *dev)
1297 {
1298         struct smc911x_local *lp = netdev_priv(dev);
1299         unsigned int multicast_table[2];
1300         unsigned int mcr, update_multicast = 0;
1301         unsigned long flags;
1302 
1303         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1304 
1305         spin_lock_irqsave(&lp->lock, flags);
1306         SMC_GET_MAC_CR(lp, mcr);
1307         spin_unlock_irqrestore(&lp->lock, flags);
1308 
1309         if (dev->flags & IFF_PROMISC) {
1310 
1311                 DBG(SMC_DEBUG_MISC, dev, "RCR_PRMS\n");
1312                 mcr |= MAC_CR_PRMS_;
1313         }
1314         /*
1315          * Here, I am setting this to accept all multicast packets.
1316          * I don't need to zero the multicast table, because the flag is
1317          * checked before the table is
1318          */
1319         else if (dev->flags & IFF_ALLMULTI || netdev_mc_count(dev) > 16) {
1320                 DBG(SMC_DEBUG_MISC, dev, "RCR_ALMUL\n");
1321                 mcr |= MAC_CR_MCPAS_;
1322         }
1323 
1324         /*
1325          * This sets the internal hardware table to filter out unwanted
1326          * multicast packets before they take up memory.
1327          *
1328          * The SMC chip uses a hash table where the high 6 bits of the CRC of
1329          * address are the offset into the table.       If that bit is 1, then the
1330          * multicast packet is accepted.  Otherwise, it's dropped silently.
1331          *
1332          * To use the 6 bits as an offset into the table, the high 1 bit is
1333          * the number of the 32 bit register, while the low 5 bits are the bit
1334          * within that register.
1335          */
1336         else if (!netdev_mc_empty(dev)) {
1337                 struct netdev_hw_addr *ha;
1338 
1339                 /* Set the Hash perfec mode */
1340                 mcr |= MAC_CR_HPFILT_;
1341 
1342                 /* start with a table of all zeros: reject all */
1343                 memset(multicast_table, 0, sizeof(multicast_table));
1344 
1345                 netdev_for_each_mc_addr(ha, dev) {
1346                         u32 position;
1347 
1348                         /* upper 6 bits are used as hash index */
1349                         position = ether_crc(ETH_ALEN, ha->addr)>>26;
1350 
1351                         multicast_table[position>>5] |= 1 << (position&0x1f);
1352                 }
1353 
1354                 /* be sure I get rid of flags I might have set */
1355                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1356 
1357                 /* now, the table can be loaded into the chipset */
1358                 update_multicast = 1;
1359         } else   {
1360                 DBG(SMC_DEBUG_MISC, dev, "~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n");
1361                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1362 
1363                 /*
1364                  * since I'm disabling all multicast entirely, I need to
1365                  * clear the multicast list
1366                  */
1367                 memset(multicast_table, 0, sizeof(multicast_table));
1368                 update_multicast = 1;
1369         }
1370 
1371         spin_lock_irqsave(&lp->lock, flags);
1372         SMC_SET_MAC_CR(lp, mcr);
1373         if (update_multicast) {
1374                 DBG(SMC_DEBUG_MISC, dev,
1375                     "update mcast hash table 0x%08x 0x%08x\n",
1376                     multicast_table[0], multicast_table[1]);
1377                 SMC_SET_HASHL(lp, multicast_table[0]);
1378                 SMC_SET_HASHH(lp, multicast_table[1]);
1379         }
1380         spin_unlock_irqrestore(&lp->lock, flags);
1381 }
1382 
1383 
1384 /*
1385  * Open and Initialize the board
1386  *
1387  * Set up everything, reset the card, etc..
1388  */
1389 static int
1390 smc911x_open(struct net_device *dev)
1391 {
1392         struct smc911x_local *lp = netdev_priv(dev);
1393 
1394         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1395 
1396         /* reset the hardware */
1397         smc911x_reset(dev);
1398 
1399         /* Configure the PHY, initialize the link state */
1400         smc911x_phy_configure(&lp->phy_configure);
1401 
1402         /* Turn on Tx + Rx */
1403         smc911x_enable(dev);
1404 
1405         netif_start_queue(dev);
1406 
1407         return 0;
1408 }
1409 
1410 /*
1411  * smc911x_close
1412  *
1413  * this makes the board clean up everything that it can
1414  * and not talk to the outside world.    Caused by
1415  * an 'ifconfig ethX down'
1416  */
1417 static int smc911x_close(struct net_device *dev)
1418 {
1419         struct smc911x_local *lp = netdev_priv(dev);
1420 
1421         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1422 
1423         netif_stop_queue(dev);
1424         netif_carrier_off(dev);
1425 
1426         /* clear everything */
1427         smc911x_shutdown(dev);
1428 
1429         if (lp->phy_type != 0) {
1430                 /* We need to ensure that no calls to
1431                  * smc911x_phy_configure are pending.
1432                  */
1433                 cancel_work_sync(&lp->phy_configure);
1434                 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1435         }
1436 
1437         if (lp->pending_tx_skb) {
1438                 dev_kfree_skb(lp->pending_tx_skb);
1439                 lp->pending_tx_skb = NULL;
1440         }
1441 
1442         return 0;
1443 }
1444 
1445 /*
1446  * Ethtool support
1447  */
1448 static int
1449 smc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1450 {
1451         struct smc911x_local *lp = netdev_priv(dev);
1452         int ret, status;
1453         unsigned long flags;
1454 
1455         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1456         cmd->maxtxpkt = 1;
1457         cmd->maxrxpkt = 1;
1458 
1459         if (lp->phy_type != 0) {
1460                 spin_lock_irqsave(&lp->lock, flags);
1461                 ret = mii_ethtool_gset(&lp->mii, cmd);
1462                 spin_unlock_irqrestore(&lp->lock, flags);
1463         } else {
1464                 cmd->supported = SUPPORTED_10baseT_Half |
1465                                 SUPPORTED_10baseT_Full |
1466                                 SUPPORTED_TP | SUPPORTED_AUI;
1467 
1468                 if (lp->ctl_rspeed == 10)
1469                         ethtool_cmd_speed_set(cmd, SPEED_10);
1470                 else if (lp->ctl_rspeed == 100)
1471                         ethtool_cmd_speed_set(cmd, SPEED_100);
1472 
1473                 cmd->autoneg = AUTONEG_DISABLE;
1474                 if (lp->mii.phy_id==1)
1475                         cmd->transceiver = XCVR_INTERNAL;
1476                 else
1477                         cmd->transceiver = XCVR_EXTERNAL;
1478                 cmd->port = 0;
1479                 SMC_GET_PHY_SPECIAL(lp, lp->mii.phy_id, status);
1480                 cmd->duplex =
1481                         (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1482                                 DUPLEX_FULL : DUPLEX_HALF;
1483                 ret = 0;
1484         }
1485 
1486         return ret;
1487 }
1488 
1489 static int
1490 smc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1491 {
1492         struct smc911x_local *lp = netdev_priv(dev);
1493         int ret;
1494         unsigned long flags;
1495 
1496         if (lp->phy_type != 0) {
1497                 spin_lock_irqsave(&lp->lock, flags);
1498                 ret = mii_ethtool_sset(&lp->mii, cmd);
1499                 spin_unlock_irqrestore(&lp->lock, flags);
1500         } else {
1501                 if (cmd->autoneg != AUTONEG_DISABLE ||
1502                         cmd->speed != SPEED_10 ||
1503                         (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1504                         (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1505                         return -EINVAL;
1506 
1507                 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1508 
1509                 ret = 0;
1510         }
1511 
1512         return ret;
1513 }
1514 
1515 static void
1516 smc911x_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1517 {
1518         strlcpy(info->driver, CARDNAME, sizeof(info->driver));
1519         strlcpy(info->version, version, sizeof(info->version));
1520         strlcpy(info->bus_info, dev_name(dev->dev.parent),
1521                 sizeof(info->bus_info));
1522 }
1523 
1524 static int smc911x_ethtool_nwayreset(struct net_device *dev)
1525 {
1526         struct smc911x_local *lp = netdev_priv(dev);
1527         int ret = -EINVAL;
1528         unsigned long flags;
1529 
1530         if (lp->phy_type != 0) {
1531                 spin_lock_irqsave(&lp->lock, flags);
1532                 ret = mii_nway_restart(&lp->mii);
1533                 spin_unlock_irqrestore(&lp->lock, flags);
1534         }
1535 
1536         return ret;
1537 }
1538 
1539 static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1540 {
1541         struct smc911x_local *lp = netdev_priv(dev);
1542         return lp->msg_enable;
1543 }
1544 
1545 static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1546 {
1547         struct smc911x_local *lp = netdev_priv(dev);
1548         lp->msg_enable = level;
1549 }
1550 
1551 static int smc911x_ethtool_getregslen(struct net_device *dev)
1552 {
1553         /* System regs + MAC regs + PHY regs */
1554         return (((E2P_CMD - ID_REV)/4 + 1) +
1555                         (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1556 }
1557 
1558 static void smc911x_ethtool_getregs(struct net_device *dev,
1559                                                                                  struct ethtool_regs* regs, void *buf)
1560 {
1561         struct smc911x_local *lp = netdev_priv(dev);
1562         unsigned long flags;
1563         u32 reg,i,j=0;
1564         u32 *data = (u32*)buf;
1565 
1566         regs->version = lp->version;
1567         for(i=ID_REV;i<=E2P_CMD;i+=4) {
1568                 data[j++] = SMC_inl(lp, i);
1569         }
1570         for(i=MAC_CR;i<=WUCSR;i++) {
1571                 spin_lock_irqsave(&lp->lock, flags);
1572                 SMC_GET_MAC_CSR(lp, i, reg);
1573                 spin_unlock_irqrestore(&lp->lock, flags);
1574                 data[j++] = reg;
1575         }
1576         for(i=0;i<=31;i++) {
1577                 spin_lock_irqsave(&lp->lock, flags);
1578                 SMC_GET_MII(lp, i, lp->mii.phy_id, reg);
1579                 spin_unlock_irqrestore(&lp->lock, flags);
1580                 data[j++] = reg & 0xFFFF;
1581         }
1582 }
1583 
1584 static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1585 {
1586         struct smc911x_local *lp = netdev_priv(dev);
1587         unsigned int timeout;
1588         int e2p_cmd;
1589 
1590         e2p_cmd = SMC_GET_E2P_CMD(lp);
1591         for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1592                 if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1593                         PRINTK(dev, "%s timeout waiting for EEPROM to respond\n",
1594                                __func__);
1595                         return -EFAULT;
1596                 }
1597                 mdelay(1);
1598                 e2p_cmd = SMC_GET_E2P_CMD(lp);
1599         }
1600         if (timeout == 0) {
1601                 PRINTK(dev, "%s timeout waiting for EEPROM CMD not busy\n",
1602                        __func__);
1603                 return -ETIMEDOUT;
1604         }
1605         return 0;
1606 }
1607 
1608 static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1609                                                                                                         int cmd, int addr)
1610 {
1611         struct smc911x_local *lp = netdev_priv(dev);
1612         int ret;
1613 
1614         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1615                 return ret;
1616         SMC_SET_E2P_CMD(lp, E2P_CMD_EPC_BUSY_ |
1617                 ((cmd) & (0x7<<28)) |
1618                 ((addr) & 0xFF));
1619         return 0;
1620 }
1621 
1622 static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1623                                                                                                         u8 *data)
1624 {
1625         struct smc911x_local *lp = netdev_priv(dev);
1626         int ret;
1627 
1628         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1629                 return ret;
1630         *data = SMC_GET_E2P_DATA(lp);
1631         return 0;
1632 }
1633 
1634 static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1635                                                                                                          u8 data)
1636 {
1637         struct smc911x_local *lp = netdev_priv(dev);
1638         int ret;
1639 
1640         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1641                 return ret;
1642         SMC_SET_E2P_DATA(lp, data);
1643         return 0;
1644 }
1645 
1646 static int smc911x_ethtool_geteeprom(struct net_device *dev,
1647                                                                           struct ethtool_eeprom *eeprom, u8 *data)
1648 {
1649         u8 eebuf[SMC911X_EEPROM_LEN];
1650         int i, ret;
1651 
1652         for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1653                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1654                         return ret;
1655                 if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1656                         return ret;
1657                 }
1658         memcpy(data, eebuf+eeprom->offset, eeprom->len);
1659         return 0;
1660 }
1661 
1662 static int smc911x_ethtool_seteeprom(struct net_device *dev,
1663                                                                            struct ethtool_eeprom *eeprom, u8 *data)
1664 {
1665         int i, ret;
1666 
1667         /* Enable erase */
1668         if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1669                 return ret;
1670         for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1671                 /* erase byte */
1672                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1673                         return ret;
1674                 /* write byte */
1675                 if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1676                          return ret;
1677                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1678                         return ret;
1679                 }
1680          return 0;
1681 }
1682 
1683 static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1684 {
1685          return SMC911X_EEPROM_LEN;
1686 }
1687 
1688 static const struct ethtool_ops smc911x_ethtool_ops = {
1689         .get_settings    = smc911x_ethtool_getsettings,
1690         .set_settings    = smc911x_ethtool_setsettings,
1691         .get_drvinfo     = smc911x_ethtool_getdrvinfo,
1692         .get_msglevel    = smc911x_ethtool_getmsglevel,
1693         .set_msglevel    = smc911x_ethtool_setmsglevel,
1694         .nway_reset = smc911x_ethtool_nwayreset,
1695         .get_link        = ethtool_op_get_link,
1696         .get_regs_len    = smc911x_ethtool_getregslen,
1697         .get_regs        = smc911x_ethtool_getregs,
1698         .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1699         .get_eeprom = smc911x_ethtool_geteeprom,
1700         .set_eeprom = smc911x_ethtool_seteeprom,
1701 };
1702 
1703 /*
1704  * smc911x_findirq
1705  *
1706  * This routine has a simple purpose -- make the SMC chip generate an
1707  * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1708  */
1709 static int smc911x_findirq(struct net_device *dev)
1710 {
1711         struct smc911x_local *lp = netdev_priv(dev);
1712         int timeout = 20;
1713         unsigned long cookie;
1714 
1715         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1716 
1717         cookie = probe_irq_on();
1718 
1719         /*
1720          * Force a SW interrupt
1721          */
1722 
1723         SMC_SET_INT_EN(lp, INT_EN_SW_INT_EN_);
1724 
1725         /*
1726          * Wait until positive that the interrupt has been generated
1727          */
1728         do {
1729                 int int_status;
1730                 udelay(10);
1731                 int_status = SMC_GET_INT_EN(lp);
1732                 if (int_status & INT_EN_SW_INT_EN_)
1733                          break;         /* got the interrupt */
1734         } while (--timeout);
1735 
1736         /*
1737          * there is really nothing that I can do here if timeout fails,
1738          * as autoirq_report will return a 0 anyway, which is what I
1739          * want in this case.    Plus, the clean up is needed in both
1740          * cases.
1741          */
1742 
1743         /* and disable all interrupts again */
1744         SMC_SET_INT_EN(lp, 0);
1745 
1746         /* and return what I found */
1747         return probe_irq_off(cookie);
1748 }
1749 
1750 static const struct net_device_ops smc911x_netdev_ops = {
1751         .ndo_open               = smc911x_open,
1752         .ndo_stop               = smc911x_close,
1753         .ndo_start_xmit         = smc911x_hard_start_xmit,
1754         .ndo_tx_timeout         = smc911x_timeout,
1755         .ndo_set_rx_mode        = smc911x_set_multicast_list,
1756         .ndo_change_mtu         = eth_change_mtu,
1757         .ndo_validate_addr      = eth_validate_addr,
1758         .ndo_set_mac_address    = eth_mac_addr,
1759 #ifdef CONFIG_NET_POLL_CONTROLLER
1760         .ndo_poll_controller    = smc911x_poll_controller,
1761 #endif
1762 };
1763 
1764 /*
1765  * Function: smc911x_probe(unsigned long ioaddr)
1766  *
1767  * Purpose:
1768  *       Tests to see if a given ioaddr points to an SMC911x chip.
1769  *       Returns a 0 on success
1770  *
1771  * Algorithm:
1772  *       (1) see if the endian word is OK
1773  *       (1) see if I recognize the chip ID in the appropriate register
1774  *
1775  * Here I do typical initialization tasks.
1776  *
1777  * o  Initialize the structure if needed
1778  * o  print out my vanity message if not done so already
1779  * o  print out what type of hardware is detected
1780  * o  print out the ethernet address
1781  * o  find the IRQ
1782  * o  set up my private data
1783  * o  configure the dev structure with my subroutines
1784  * o  actually GRAB the irq.
1785  * o  GRAB the region
1786  */
1787 static int smc911x_probe(struct net_device *dev)
1788 {
1789         struct smc911x_local *lp = netdev_priv(dev);
1790         int i, retval;
1791         unsigned int val, chip_id, revision;
1792         const char *version_string;
1793         unsigned long irq_flags;
1794 #ifdef SMC_USE_DMA
1795         struct dma_slave_config config;
1796         dma_cap_mask_t mask;
1797         struct pxad_param param;
1798 #endif
1799 
1800         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1801 
1802         /* First, see if the endian word is recognized */
1803         val = SMC_GET_BYTE_TEST(lp);
1804         DBG(SMC_DEBUG_MISC, dev, "%s: endian probe returned 0x%04x\n",
1805             CARDNAME, val);
1806         if (val != 0x87654321) {
1807                 netdev_err(dev, "Invalid chip endian 0x%08x\n", val);
1808                 retval = -ENODEV;
1809                 goto err_out;
1810         }
1811 
1812         /*
1813          * check if the revision register is something that I
1814          * recognize.   These might need to be added to later,
1815          * as future revisions could be added.
1816          */
1817         chip_id = SMC_GET_PN(lp);
1818         DBG(SMC_DEBUG_MISC, dev, "%s: id probe returned 0x%04x\n",
1819             CARDNAME, chip_id);
1820         for(i=0;chip_ids[i].id != 0; i++) {
1821                 if (chip_ids[i].id == chip_id) break;
1822         }
1823         if (!chip_ids[i].id) {
1824                 netdev_err(dev, "Unknown chip ID %04x\n", chip_id);
1825                 retval = -ENODEV;
1826                 goto err_out;
1827         }
1828         version_string = chip_ids[i].name;
1829 
1830         revision = SMC_GET_REV(lp);
1831         DBG(SMC_DEBUG_MISC, dev, "%s: revision = 0x%04x\n", CARDNAME, revision);
1832 
1833         /* At this point I'll assume that the chip is an SMC911x. */
1834         DBG(SMC_DEBUG_MISC, dev, "%s: Found a %s\n",
1835             CARDNAME, chip_ids[i].name);
1836 
1837         /* Validate the TX FIFO size requested */
1838         if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1839                 netdev_err(dev, "Invalid TX FIFO size requested %d\n",
1840                            tx_fifo_kb);
1841                 retval = -EINVAL;
1842                 goto err_out;
1843         }
1844 
1845         /* fill in some of the fields */
1846         lp->version = chip_ids[i].id;
1847         lp->revision = revision;
1848         lp->tx_fifo_kb = tx_fifo_kb;
1849         /* Reverse calculate the RX FIFO size from the TX */
1850         lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1851         lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1852 
1853         /* Set the automatic flow control values */
1854         switch(lp->tx_fifo_kb) {
1855                 /*
1856                  *       AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1857                  *       AFC_LO is AFC_HI/2
1858                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1859                  */
1860                 case 2:/* 13440 Rx Data Fifo Size */
1861                         lp->afc_cfg=0x008C46AF;break;
1862                 case 3:/* 12480 Rx Data Fifo Size */
1863                         lp->afc_cfg=0x0082419F;break;
1864                 case 4:/* 11520 Rx Data Fifo Size */
1865                         lp->afc_cfg=0x00783C9F;break;
1866                 case 5:/* 10560 Rx Data Fifo Size */
1867                         lp->afc_cfg=0x006E374F;break;
1868                 case 6:/* 9600 Rx Data Fifo Size */
1869                         lp->afc_cfg=0x0064328F;break;
1870                 case 7:/* 8640 Rx Data Fifo Size */
1871                         lp->afc_cfg=0x005A2D7F;break;
1872                 case 8:/* 7680 Rx Data Fifo Size */
1873                         lp->afc_cfg=0x0050287F;break;
1874                 case 9:/* 6720 Rx Data Fifo Size */
1875                         lp->afc_cfg=0x0046236F;break;
1876                 case 10:/* 5760 Rx Data Fifo Size */
1877                         lp->afc_cfg=0x003C1E6F;break;
1878                 case 11:/* 4800 Rx Data Fifo Size */
1879                         lp->afc_cfg=0x0032195F;break;
1880                 /*
1881                  *       AFC_HI is ~1520 bytes less than RX Data Fifo Size
1882                  *       AFC_LO is AFC_HI/2
1883                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1884                  */
1885                 case 12:/* 3840 Rx Data Fifo Size */
1886                         lp->afc_cfg=0x0024124F;break;
1887                 case 13:/* 2880 Rx Data Fifo Size */
1888                         lp->afc_cfg=0x0015073F;break;
1889                 case 14:/* 1920 Rx Data Fifo Size */
1890                         lp->afc_cfg=0x0006032F;break;
1891                  default:
1892                          PRINTK(dev, "ERROR -- no AFC_CFG setting found");
1893                          break;
1894         }
1895 
1896         DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX, dev,
1897             "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1898             lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1899 
1900         spin_lock_init(&lp->lock);
1901 
1902         /* Get the MAC address */
1903         SMC_GET_MAC_ADDR(lp, dev->dev_addr);
1904 
1905         /* now, reset the chip, and put it into a known state */
1906         smc911x_reset(dev);
1907 
1908         /*
1909          * If dev->irq is 0, then the device has to be banged on to see
1910          * what the IRQ is.
1911          *
1912          * Specifying an IRQ is done with the assumption that the user knows
1913          * what (s)he is doing.  No checking is done!!!!
1914          */
1915         if (dev->irq < 1) {
1916                 int trials;
1917 
1918                 trials = 3;
1919                 while (trials--) {
1920                         dev->irq = smc911x_findirq(dev);
1921                         if (dev->irq)
1922                                 break;
1923                         /* kick the card and try again */
1924                         smc911x_reset(dev);
1925                 }
1926         }
1927         if (dev->irq == 0) {
1928                 netdev_warn(dev, "Couldn't autodetect your IRQ. Use irq=xx.\n");
1929                 retval = -ENODEV;
1930                 goto err_out;
1931         }
1932         dev->irq = irq_canonicalize(dev->irq);
1933 
1934         dev->netdev_ops = &smc911x_netdev_ops;
1935         dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1936         dev->ethtool_ops = &smc911x_ethtool_ops;
1937 
1938         INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
1939         lp->mii.phy_id_mask = 0x1f;
1940         lp->mii.reg_num_mask = 0x1f;
1941         lp->mii.force_media = 0;
1942         lp->mii.full_duplex = 0;
1943         lp->mii.dev = dev;
1944         lp->mii.mdio_read = smc911x_phy_read;
1945         lp->mii.mdio_write = smc911x_phy_write;
1946 
1947         /*
1948          * Locate the phy, if any.
1949          */
1950         smc911x_phy_detect(dev);
1951 
1952         /* Set default parameters */
1953         lp->msg_enable = NETIF_MSG_LINK;
1954         lp->ctl_rfduplx = 1;
1955         lp->ctl_rspeed = 100;
1956 
1957 #ifdef SMC_DYNAMIC_BUS_CONFIG
1958         irq_flags = lp->cfg.irq_flags;
1959 #else
1960         irq_flags = IRQF_SHARED | SMC_IRQ_SENSE;
1961 #endif
1962 
1963         /* Grab the IRQ */
1964         retval = request_irq(dev->irq, smc911x_interrupt,
1965                              irq_flags, dev->name, dev);
1966         if (retval)
1967                 goto err_out;
1968 
1969 #ifdef SMC_USE_DMA
1970 
1971         dma_cap_zero(mask);
1972         dma_cap_set(DMA_SLAVE, mask);
1973         param.prio = PXAD_PRIO_LOWEST;
1974         param.drcmr = -1UL;
1975 
1976         lp->rxdma =
1977                 dma_request_slave_channel_compat(mask, pxad_filter_fn,
1978                                                  &param, &dev->dev, "rx");
1979         lp->txdma =
1980                 dma_request_slave_channel_compat(mask, pxad_filter_fn,
1981                                                  &param, &dev->dev, "tx");
1982         lp->rxdma_active = 0;
1983         lp->txdma_active = 0;
1984 
1985         memset(&config, 0, sizeof(config));
1986         config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1987         config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1988         config.src_addr = lp->physaddr + RX_DATA_FIFO;
1989         config.dst_addr = lp->physaddr + TX_DATA_FIFO;
1990         config.src_maxburst = 32;
1991         config.dst_maxburst = 32;
1992         retval = dmaengine_slave_config(lp->rxdma, &config);
1993         if (retval) {
1994                 dev_err(lp->dev, "dma rx channel configuration failed: %d\n",
1995                         retval);
1996                 goto err_out;
1997         }
1998         retval = dmaengine_slave_config(lp->txdma, &config);
1999         if (retval) {
2000                 dev_err(lp->dev, "dma tx channel configuration failed: %d\n",
2001                         retval);
2002                 goto err_out;
2003         }
2004 #endif
2005 
2006         retval = register_netdev(dev);
2007         if (retval == 0) {
2008                 /* now, print out the card info, in a short format.. */
2009                 netdev_info(dev, "%s (rev %d) at %#lx IRQ %d",
2010                             version_string, lp->revision,
2011                             dev->base_addr, dev->irq);
2012 
2013 #ifdef SMC_USE_DMA
2014                 if (lp->rxdma)
2015                         pr_cont(" RXDMA %p", lp->rxdma);
2016 
2017                 if (lp->txdma)
2018                         pr_cont(" TXDMA %p", lp->txdma);
2019 #endif
2020                 pr_cont("\n");
2021                 if (!is_valid_ether_addr(dev->dev_addr)) {
2022                         netdev_warn(dev, "Invalid ethernet MAC address. Please set using ifconfig\n");
2023                 } else {
2024                         /* Print the Ethernet address */
2025                         netdev_info(dev, "Ethernet addr: %pM\n",
2026                                     dev->dev_addr);
2027                 }
2028 
2029                 if (lp->phy_type == 0) {
2030                         PRINTK(dev, "No PHY found\n");
2031                 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2032                         PRINTK(dev, "LAN911x Internal PHY\n");
2033                 } else {
2034                         PRINTK(dev, "External PHY 0x%08x\n", lp->phy_type);
2035                 }
2036         }
2037 
2038 err_out:
2039 #ifdef SMC_USE_DMA
2040         if (retval) {
2041                 if (lp->rxdma)
2042                         dma_release_channel(lp->rxdma);
2043                 if (lp->txdma)
2044                         dma_release_channel(lp->txdma);
2045         }
2046 #endif
2047         return retval;
2048 }
2049 
2050 /*
2051  * smc911x_drv_probe(void)
2052  *
2053  *        Output:
2054  *       0 --> there is a device
2055  *       anything else, error
2056  */
2057 static int smc911x_drv_probe(struct platform_device *pdev)
2058 {
2059         struct net_device *ndev;
2060         struct resource *res;
2061         struct smc911x_local *lp;
2062         void __iomem *addr;
2063         int ret;
2064 
2065         /* ndev is not valid yet, so avoid passing it in. */
2066         DBG(SMC_DEBUG_FUNC, "--> %s\n",  __func__);
2067         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2068         if (!res) {
2069                 ret = -ENODEV;
2070                 goto out;
2071         }
2072 
2073         /*
2074          * Request the regions.
2075          */
2076         if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2077                  ret = -EBUSY;
2078                  goto out;
2079         }
2080 
2081         ndev = alloc_etherdev(sizeof(struct smc911x_local));
2082         if (!ndev) {
2083                 ret = -ENOMEM;
2084                 goto release_1;
2085         }
2086         SET_NETDEV_DEV(ndev, &pdev->dev);
2087 
2088         ndev->dma = (unsigned char)-1;
2089         ndev->irq = platform_get_irq(pdev, 0);
2090         lp = netdev_priv(ndev);
2091         lp->netdev = ndev;
2092 #ifdef SMC_DYNAMIC_BUS_CONFIG
2093         {
2094                 struct smc911x_platdata *pd = dev_get_platdata(&pdev->dev);
2095                 if (!pd) {
2096                         ret = -EINVAL;
2097                         goto release_both;
2098                 }
2099                 memcpy(&lp->cfg, pd, sizeof(lp->cfg));
2100         }
2101 #endif
2102 
2103         addr = ioremap(res->start, SMC911X_IO_EXTENT);
2104         if (!addr) {
2105                 ret = -ENOMEM;
2106                 goto release_both;
2107         }
2108 
2109         platform_set_drvdata(pdev, ndev);
2110         lp->base = addr;
2111         ndev->base_addr = res->start;
2112         ret = smc911x_probe(ndev);
2113         if (ret != 0) {
2114                 iounmap(addr);
2115 release_both:
2116                 free_netdev(ndev);
2117 release_1:
2118                 release_mem_region(res->start, SMC911X_IO_EXTENT);
2119 out:
2120                 pr_info("%s: not found (%d).\n", CARDNAME, ret);
2121         }
2122 #ifdef SMC_USE_DMA
2123         else {
2124                 lp->physaddr = res->start;
2125                 lp->dev = &pdev->dev;
2126         }
2127 #endif
2128 
2129         return ret;
2130 }
2131 
2132 static int smc911x_drv_remove(struct platform_device *pdev)
2133 {
2134         struct net_device *ndev = platform_get_drvdata(pdev);
2135         struct smc911x_local *lp = netdev_priv(ndev);
2136         struct resource *res;
2137 
2138         DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2139 
2140         unregister_netdev(ndev);
2141 
2142         free_irq(ndev->irq, ndev);
2143 
2144 #ifdef SMC_USE_DMA
2145         {
2146                 if (lp->rxdma)
2147                         dma_release_channel(lp->rxdma);
2148                 if (lp->txdma)
2149                         dma_release_channel(lp->txdma);
2150         }
2151 #endif
2152         iounmap(lp->base);
2153         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2154         release_mem_region(res->start, SMC911X_IO_EXTENT);
2155 
2156         free_netdev(ndev);
2157         return 0;
2158 }
2159 
2160 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2161 {
2162         struct net_device *ndev = platform_get_drvdata(dev);
2163         struct smc911x_local *lp = netdev_priv(ndev);
2164 
2165         DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2166         if (ndev) {
2167                 if (netif_running(ndev)) {
2168                         netif_device_detach(ndev);
2169                         smc911x_shutdown(ndev);
2170 #if POWER_DOWN
2171                         /* Set D2 - Energy detect only setting */
2172                         SMC_SET_PMT_CTRL(lp, 2<<12);
2173 #endif
2174                 }
2175         }
2176         return 0;
2177 }
2178 
2179 static int smc911x_drv_resume(struct platform_device *dev)
2180 {
2181         struct net_device *ndev = platform_get_drvdata(dev);
2182 
2183         DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2184         if (ndev) {
2185                 struct smc911x_local *lp = netdev_priv(ndev);
2186 
2187                 if (netif_running(ndev)) {
2188                         smc911x_reset(ndev);
2189                         if (lp->phy_type != 0)
2190                                 smc911x_phy_configure(&lp->phy_configure);
2191                         smc911x_enable(ndev);
2192                         netif_device_attach(ndev);
2193                 }
2194         }
2195         return 0;
2196 }
2197 
2198 static struct platform_driver smc911x_driver = {
2199         .probe           = smc911x_drv_probe,
2200         .remove  = smc911x_drv_remove,
2201         .suspend         = smc911x_drv_suspend,
2202         .resume  = smc911x_drv_resume,
2203         .driver  = {
2204                 .name    = CARDNAME,
2205         },
2206 };
2207 
2208 module_platform_driver(smc911x_driver);
2209 

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