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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / net / smc911x.c
blob7c60df46fc65c99208d3e539abaeecc7d409fecf
1 /*
2 * smc911x.c
3 * This is a driver for SMSC's LAN911{5,6,7,8} single-chip Ethernet devices.
4 *
5 * Copyright (C) 2005 Sensoria Corp
6 * Derived from the unified SMC91x driver by Nicolas Pitre
7 * and the smsc911x.c reference driver by SMSC
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * Arguments:
24 * watchdog = TX watchdog timeout
25 * tx_fifo_kb = Size of TX FIFO in KB
26 *
27 * History:
28 * 04/16/05 Dustin McIntire Initial version
29 */
30 static const char version[] =
31 "smc911x.c: v1.0 04-16-2005 by Dustin McIntire <dustin@sensoria.com>\n";
32
33 /* Debugging options */
34 #define ENABLE_SMC_DEBUG_RX 0
35 #define ENABLE_SMC_DEBUG_TX 0
36 #define ENABLE_SMC_DEBUG_DMA 0
37 #define ENABLE_SMC_DEBUG_PKTS 0
38 #define ENABLE_SMC_DEBUG_MISC 0
39 #define ENABLE_SMC_DEBUG_FUNC 0
40
41 #define SMC_DEBUG_RX ((ENABLE_SMC_DEBUG_RX ? 1 : 0) << 0)
42 #define SMC_DEBUG_TX ((ENABLE_SMC_DEBUG_TX ? 1 : 0) << 1)
43 #define SMC_DEBUG_DMA ((ENABLE_SMC_DEBUG_DMA ? 1 : 0) << 2)
44 #define SMC_DEBUG_PKTS ((ENABLE_SMC_DEBUG_PKTS ? 1 : 0) << 3)
45 #define SMC_DEBUG_MISC ((ENABLE_SMC_DEBUG_MISC ? 1 : 0) << 4)
46 #define SMC_DEBUG_FUNC ((ENABLE_SMC_DEBUG_FUNC ? 1 : 0) << 5)
47
48 #ifndef SMC_DEBUG
49 #define SMC_DEBUG ( SMC_DEBUG_RX | \
50 SMC_DEBUG_TX | \
51 SMC_DEBUG_DMA | \
52 SMC_DEBUG_PKTS | \
53 SMC_DEBUG_MISC | \
54 SMC_DEBUG_FUNC \
55 )
56 #endif
57
58 #include <linux/init.h>
59 #include <linux/module.h>
60 #include <linux/kernel.h>
61 #include <linux/sched.h>
62 #include <linux/slab.h>
63 #include <linux/delay.h>
64 #include <linux/interrupt.h>
65 #include <linux/errno.h>
66 #include <linux/ioport.h>
67 #include <linux/crc32.h>
68 #include <linux/device.h>
69 #include <linux/platform_device.h>
70 #include <linux/spinlock.h>
71 #include <linux/ethtool.h>
72 #include <linux/mii.h>
73 #include <linux/workqueue.h>
74
75 #include <linux/netdevice.h>
76 #include <linux/etherdevice.h>
77 #include <linux/skbuff.h>
78
79 #include <asm/io.h>
80
81 #include "smc911x.h"
82
83 /*
84 * Transmit timeout, default 5 seconds.
85 */
86 static int watchdog = 5000;
87 module_param(watchdog, int, 0400);
88 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
89
90 static int tx_fifo_kb=8;
91 module_param(tx_fifo_kb, int, 0400);
92 MODULE_PARM_DESC(tx_fifo_kb,"transmit FIFO size in KB (1<x<15)(default=8)");
93
94 MODULE_LICENSE("GPL");
95
96 /*
97 * The internal workings of the driver. If you are changing anything
98 * here with the SMC stuff, you should have the datasheet and know
99 * what you are doing.
100 */
101 #define CARDNAME "smc911x"
102
103 /*
104 * Use power-down feature of the chip
105 */
106 #define POWER_DOWN 1
107
108
109 /* store this information for the driver.. */
110 struct smc911x_local {
111 /*
112 * If I have to wait until the DMA is finished and ready to reload a
113 * packet, I will store the skbuff here. Then, the DMA will send it
114 * out and free it.
115 */
116 struct sk_buff *pending_tx_skb;
117
118 /* version/revision of the SMC911x chip */
119 u16 version;
120 u16 revision;
121
122 /* FIFO sizes */
123 int tx_fifo_kb;
124 int tx_fifo_size;
125 int rx_fifo_size;
126 int afc_cfg;
127
128 /* Contains the current active receive/phy mode */
129 int ctl_rfduplx;
130 int ctl_rspeed;
131
132 u32 msg_enable;
133 u32 phy_type;
134 struct mii_if_info mii;
135
136 /* work queue */
137 struct work_struct phy_configure;
138 int work_pending;
139
140 int tx_throttle;
141 spinlock_t lock;
142
143 struct net_device *netdev;
144
145 #ifdef SMC_USE_DMA
146 /* DMA needs the physical address of the chip */
147 u_long physaddr;
148 int rxdma;
149 int txdma;
150 int rxdma_active;
151 int txdma_active;
152 struct sk_buff *current_rx_skb;
153 struct sk_buff *current_tx_skb;
154 struct device *dev;
155 #endif
156 };
157
158 #if SMC_DEBUG > 0
159 #define DBG(n, args...) \
160 do { \
161 if (SMC_DEBUG & (n)) \
162 printk(args); \
163 } while (0)
164
165 #define PRINTK(args...) printk(args)
166 #else
167 #define DBG(n, args...) do { } while (0)
168 #define PRINTK(args...) printk(KERN_DEBUG args)
169 #endif
170
171 #if SMC_DEBUG_PKTS > 0
172 static void PRINT_PKT(u_char *buf, int length)
173 {
174 int i;
175 int remainder;
176 int lines;
177
178 lines = length / 16;
179 remainder = length % 16;
180
181 for (i = 0; i < lines ; i ++) {
182 int cur;
183 for (cur = 0; cur < 8; cur++) {
184 u_char a, b;
185 a = *buf++;
186 b = *buf++;
187 printk("%02x%02x ", a, b);
188 }
189 printk("\n");
190 }
191 for (i = 0; i < remainder/2 ; i++) {
192 u_char a, b;
193 a = *buf++;
194 b = *buf++;
195 printk("%02x%02x ", a, b);
196 }
197 printk("\n");
198 }
199 #else
200 #define PRINT_PKT(x...) do { } while (0)
201 #endif
202
203
204 /* this enables an interrupt in the interrupt mask register */
205 #define SMC_ENABLE_INT(x) do { \
206 unsigned int __mask; \
207 unsigned long __flags; \
208 spin_lock_irqsave(&lp->lock, __flags); \
209 __mask = SMC_GET_INT_EN(); \
210 __mask |= (x); \
211 SMC_SET_INT_EN(__mask); \
212 spin_unlock_irqrestore(&lp->lock, __flags); \
213 } while (0)
214
215 /* this disables an interrupt from the interrupt mask register */
216 #define SMC_DISABLE_INT(x) do { \
217 unsigned int __mask; \
218 unsigned long __flags; \
219 spin_lock_irqsave(&lp->lock, __flags); \
220 __mask = SMC_GET_INT_EN(); \
221 __mask &= ~(x); \
222 SMC_SET_INT_EN(__mask); \
223 spin_unlock_irqrestore(&lp->lock, __flags); \
224 } while (0)
225
226 /*
227 * this does a soft reset on the device
228 */
229 static void smc911x_reset(struct net_device *dev)
230 {
231 unsigned long ioaddr = dev->base_addr;
232 struct smc911x_local *lp = netdev_priv(dev);
233 unsigned int reg, timeout=0, resets=1;
234 unsigned long flags;
235
236 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
237
238 /* Take out of PM setting first */
239 if ((SMC_GET_PMT_CTRL() & PMT_CTRL_READY_) == 0) {
240 /* Write to the bytetest will take out of powerdown */
241 SMC_SET_BYTE_TEST(0);
242 timeout=10;
243 do {
244 udelay(10);
245 reg = SMC_GET_PMT_CTRL() & PMT_CTRL_READY_;
246 } while ( timeout-- && !reg);
247 if (timeout == 0) {
248 PRINTK("%s: smc911x_reset timeout waiting for PM restore\n", dev->name);
249 return;
250 }
251 }
252
253 /* Disable all interrupts */
254 spin_lock_irqsave(&lp->lock, flags);
255 SMC_SET_INT_EN(0);
256 spin_unlock_irqrestore(&lp->lock, flags);
257
258 while (resets--) {
259 SMC_SET_HW_CFG(HW_CFG_SRST_);
260 timeout=10;
261 do {
262 udelay(10);
263 reg = SMC_GET_HW_CFG();
264 /* If chip indicates reset timeout then try again */
265 if (reg & HW_CFG_SRST_TO_) {
266 PRINTK("%s: chip reset timeout, retrying...\n", dev->name);
267 resets++;
268 break;
269 }
270 } while ( timeout-- && (reg & HW_CFG_SRST_));
271 }
272 if (timeout == 0) {
273 PRINTK("%s: smc911x_reset timeout waiting for reset\n", dev->name);
274 return;
275 }
276
277 /* make sure EEPROM has finished loading before setting GPIO_CFG */
278 timeout=1000;
279 while ( timeout-- && (SMC_GET_E2P_CMD() & E2P_CMD_EPC_BUSY_)) {
280 udelay(10);
281 }
282 if (timeout == 0){
283 PRINTK("%s: smc911x_reset timeout waiting for EEPROM busy\n", dev->name);
284 return;
285 }
286
287 /* Initialize interrupts */
288 SMC_SET_INT_EN(0);
289 SMC_ACK_INT(-1);
290
291 /* Reset the FIFO level and flow control settings */
292 SMC_SET_HW_CFG((lp->tx_fifo_kb & 0xF) << 16);
293 //TODO: Figure out what appropriate pause time is
294 SMC_SET_FLOW(FLOW_FCPT_ | FLOW_FCEN_);
295 SMC_SET_AFC_CFG(lp->afc_cfg);
296
297
298 /* Set to LED outputs */
299 SMC_SET_GPIO_CFG(0x70070000);
300
301 /*
302 * Deassert IRQ for 1*10us for edge type interrupts
303 * and drive IRQ pin push-pull
304 */
305 SMC_SET_IRQ_CFG( (1 << 24) | INT_CFG_IRQ_EN_ | INT_CFG_IRQ_TYPE_ );
306
307 /* clear anything saved */
308 if (lp->pending_tx_skb != NULL) {
309 dev_kfree_skb (lp->pending_tx_skb);
310 lp->pending_tx_skb = NULL;
311 dev->stats.tx_errors++;
312 dev->stats.tx_aborted_errors++;
313 }
314 }
315
316 /*
317 * Enable Interrupts, Receive, and Transmit
318 */
319 static void smc911x_enable(struct net_device *dev)
320 {
321 unsigned long ioaddr = dev->base_addr;
322 struct smc911x_local *lp = netdev_priv(dev);
323 unsigned mask, cfg, cr;
324 unsigned long flags;
325
326 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
327
328 SMC_SET_MAC_ADDR(dev->dev_addr);
329
330 /* Enable TX */
331 cfg = SMC_GET_HW_CFG();
332 cfg &= HW_CFG_TX_FIF_SZ_ | 0xFFF;
333 cfg |= HW_CFG_SF_;
334 SMC_SET_HW_CFG(cfg);
335 SMC_SET_FIFO_TDA(0xFF);
336 /* Update TX stats on every 64 packets received or every 1 sec */
337 SMC_SET_FIFO_TSL(64);
338 SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
339
340 spin_lock_irqsave(&lp->lock, flags);
341 SMC_GET_MAC_CR(cr);
342 cr |= MAC_CR_TXEN_ | MAC_CR_HBDIS_;
343 SMC_SET_MAC_CR(cr);
344 SMC_SET_TX_CFG(TX_CFG_TX_ON_);
345 spin_unlock_irqrestore(&lp->lock, flags);
346
347 /* Add 2 byte padding to start of packets */
348 SMC_SET_RX_CFG((2<<8) & RX_CFG_RXDOFF_);
349
350 /* Turn on receiver and enable RX */
351 if (cr & MAC_CR_RXEN_)
352 DBG(SMC_DEBUG_RX, "%s: Receiver already enabled\n", dev->name);
353
354 spin_lock_irqsave(&lp->lock, flags);
355 SMC_SET_MAC_CR( cr | MAC_CR_RXEN_ );
356 spin_unlock_irqrestore(&lp->lock, flags);
357
358 /* Interrupt on every received packet */
359 SMC_SET_FIFO_RSA(0x01);
360 SMC_SET_FIFO_RSL(0x00);
361
362 /* now, enable interrupts */
363 mask = INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_ | INT_EN_RSFL_EN_ |
364 INT_EN_GPT_INT_EN_ | INT_EN_RXDFH_INT_EN_ | INT_EN_RXE_EN_ |
365 INT_EN_PHY_INT_EN_;
366 if (IS_REV_A(lp->revision))
367 mask|=INT_EN_RDFL_EN_;
368 else {
369 mask|=INT_EN_RDFO_EN_;
370 }
371 SMC_ENABLE_INT(mask);
372 }
373
374 /*
375 * this puts the device in an inactive state
376 */
377 static void smc911x_shutdown(struct net_device *dev)
378 {
379 unsigned long ioaddr = dev->base_addr;
380 struct smc911x_local *lp = netdev_priv(dev);
381 unsigned cr;
382 unsigned long flags;
383
384 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", CARDNAME, __FUNCTION__);
385
386 /* Disable IRQ's */
387 SMC_SET_INT_EN(0);
388
389 /* Turn of Rx and TX */
390 spin_lock_irqsave(&lp->lock, flags);
391 SMC_GET_MAC_CR(cr);
392 cr &= ~(MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
393 SMC_SET_MAC_CR(cr);
394 SMC_SET_TX_CFG(TX_CFG_STOP_TX_);
395 spin_unlock_irqrestore(&lp->lock, flags);
396 }
397
398 static inline void smc911x_drop_pkt(struct net_device *dev)
399 {
400 unsigned long ioaddr = dev->base_addr;
401 unsigned int fifo_count, timeout, reg;
402
403 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, "%s: --> %s\n", CARDNAME, __FUNCTION__);
404 fifo_count = SMC_GET_RX_FIFO_INF() & 0xFFFF;
405 if (fifo_count <= 4) {
406 /* Manually dump the packet data */
407 while (fifo_count--)
408 SMC_GET_RX_FIFO();
409 } else {
410 /* Fast forward through the bad packet */
411 SMC_SET_RX_DP_CTRL(RX_DP_CTRL_FFWD_BUSY_);
412 timeout=50;
413 do {
414 udelay(10);
415 reg = SMC_GET_RX_DP_CTRL() & RX_DP_CTRL_FFWD_BUSY_;
416 } while ( timeout-- && reg);
417 if (timeout == 0) {
418 PRINTK("%s: timeout waiting for RX fast forward\n", dev->name);
419 }
420 }
421 }
422
423 /*
424 * This is the procedure to handle the receipt of a packet.
425 * It should be called after checking for packet presence in
426 * the RX status FIFO. It must be called with the spin lock
427 * already held.
428 */
429 static inline void smc911x_rcv(struct net_device *dev)
430 {
431 struct smc911x_local *lp = netdev_priv(dev);
432 unsigned long ioaddr = dev->base_addr;
433 unsigned int pkt_len, status;
434 struct sk_buff *skb;
435 unsigned char *data;
436
437 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, "%s: --> %s\n",
438 dev->name, __FUNCTION__);
439 status = SMC_GET_RX_STS_FIFO();
440 DBG(SMC_DEBUG_RX, "%s: Rx pkt len %d status 0x%08x \n",
441 dev->name, (status & 0x3fff0000) >> 16, status & 0xc000ffff);
442 pkt_len = (status & RX_STS_PKT_LEN_) >> 16;
443 if (status & RX_STS_ES_) {
444 /* Deal with a bad packet */
445 dev->stats.rx_errors++;
446 if (status & RX_STS_CRC_ERR_)
447 dev->stats.rx_crc_errors++;
448 else {
449 if (status & RX_STS_LEN_ERR_)
450 dev->stats.rx_length_errors++;
451 if (status & RX_STS_MCAST_)
452 dev->stats.multicast++;
453 }
454 /* Remove the bad packet data from the RX FIFO */
455 smc911x_drop_pkt(dev);
456 } else {
457 /* Receive a valid packet */
458 /* Alloc a buffer with extra room for DMA alignment */
459 skb=dev_alloc_skb(pkt_len+32);
460 if (unlikely(skb == NULL)) {
461 PRINTK( "%s: Low memory, rcvd packet dropped.\n",
462 dev->name);
463 dev->stats.rx_dropped++;
464 smc911x_drop_pkt(dev);
465 return;
466 }
467 /* Align IP header to 32 bits
468 * Note that the device is configured to add a 2
469 * byte padding to the packet start, so we really
470 * want to write to the orignal data pointer */
471 data = skb->data;
472 skb_reserve(skb, 2);
473 skb_put(skb,pkt_len-4);
474 #ifdef SMC_USE_DMA
475 {
476 unsigned int fifo;
477 /* Lower the FIFO threshold if possible */
478 fifo = SMC_GET_FIFO_INT();
479 if (fifo & 0xFF) fifo--;
480 DBG(SMC_DEBUG_RX, "%s: Setting RX stat FIFO threshold to %d\n",
481 dev->name, fifo & 0xff);
482 SMC_SET_FIFO_INT(fifo);
483 /* Setup RX DMA */
484 SMC_SET_RX_CFG(RX_CFG_RX_END_ALGN16_ | ((2<<8) & RX_CFG_RXDOFF_));
485 lp->rxdma_active = 1;
486 lp->current_rx_skb = skb;
487 SMC_PULL_DATA(data, (pkt_len+2+15) & ~15);
488 /* Packet processing deferred to DMA RX interrupt */
489 }
490 #else
491 SMC_SET_RX_CFG(RX_CFG_RX_END_ALGN4_ | ((2<<8) & RX_CFG_RXDOFF_));
492 SMC_PULL_DATA(data, pkt_len+2+3);
493
494 DBG(SMC_DEBUG_PKTS, "%s: Received packet\n", dev->name);
495 PRINT_PKT(data, ((pkt_len - 4) <= 64) ? pkt_len - 4 : 64);
496 dev->last_rx = jiffies;
497 skb->protocol = eth_type_trans(skb, dev);
498 netif_rx(skb);
499 dev->stats.rx_packets++;
500 dev->stats.rx_bytes += pkt_len-4;
501 #endif
502 }
503 }
504
505 /*
506 * This is called to actually send a packet to the chip.
507 */
508 static void smc911x_hardware_send_pkt(struct net_device *dev)
509 {
510 struct smc911x_local *lp = netdev_priv(dev);
511 unsigned long ioaddr = dev->base_addr;
512 struct sk_buff *skb;
513 unsigned int cmdA, cmdB, len;
514 unsigned char *buf;
515 unsigned long flags;
516
517 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n", dev->name, __FUNCTION__);
518 BUG_ON(lp->pending_tx_skb == NULL);
519
520 skb = lp->pending_tx_skb;
521 lp->pending_tx_skb = NULL;
522
523 /* cmdA {25:24] data alignment [20:16] start offset [10:0] buffer length */
524 /* cmdB {31:16] pkt tag [10:0] length */
525 #ifdef SMC_USE_DMA
526 /* 16 byte buffer alignment mode */
527 buf = (char*)((u32)(skb->data) & ~0xF);
528 len = (skb->len + 0xF + ((u32)skb->data & 0xF)) & ~0xF;
529 cmdA = (1<<24) | (((u32)skb->data & 0xF)<<16) |
530 TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
531 skb->len;
532 #else
533 buf = (char*)((u32)skb->data & ~0x3);
534 len = (skb->len + 3 + ((u32)skb->data & 3)) & ~0x3;
535 cmdA = (((u32)skb->data & 0x3) << 16) |
536 TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
537 skb->len;
538 #endif
539 /* tag is packet length so we can use this in stats update later */
540 cmdB = (skb->len << 16) | (skb->len & 0x7FF);
541
542 DBG(SMC_DEBUG_TX, "%s: TX PKT LENGTH 0x%04x (%d) BUF 0x%p CMDA 0x%08x CMDB 0x%08x\n",
543 dev->name, len, len, buf, cmdA, cmdB);
544 SMC_SET_TX_FIFO(cmdA);
545 SMC_SET_TX_FIFO(cmdB);
546
547 DBG(SMC_DEBUG_PKTS, "%s: Transmitted packet\n", dev->name);
548 PRINT_PKT(buf, len <= 64 ? len : 64);
549
550 /* Send pkt via PIO or DMA */
551 #ifdef SMC_USE_DMA
552 lp->current_tx_skb = skb;
553 SMC_PUSH_DATA(buf, len);
554 /* DMA complete IRQ will free buffer and set jiffies */
555 #else
556 SMC_PUSH_DATA(buf, len);
557 dev->trans_start = jiffies;
558 dev_kfree_skb(skb);
559 #endif
560 spin_lock_irqsave(&lp->lock, flags);
561 if (!lp->tx_throttle) {
562 netif_wake_queue(dev);
563 }
564 spin_unlock_irqrestore(&lp->lock, flags);
565 SMC_ENABLE_INT(INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_);
566 }
567
568 /*
569 * Since I am not sure if I will have enough room in the chip's ram
570 * to store the packet, I call this routine which either sends it
571 * now, or set the card to generates an interrupt when ready
572 * for the packet.
573 */
574 static int smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
575 {
576 struct smc911x_local *lp = netdev_priv(dev);
577 unsigned long ioaddr = dev->base_addr;
578 unsigned int free;
579 unsigned long flags;
580
581 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n",
582 dev->name, __FUNCTION__);
583
584 BUG_ON(lp->pending_tx_skb != NULL);
585
586 free = SMC_GET_TX_FIFO_INF() & TX_FIFO_INF_TDFREE_;
587 DBG(SMC_DEBUG_TX, "%s: TX free space %d\n", dev->name, free);
588
589 /* Turn off the flow when running out of space in FIFO */
590 if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
591 DBG(SMC_DEBUG_TX, "%s: Disabling data flow due to low FIFO space (%d)\n",
592 dev->name, free);
593 spin_lock_irqsave(&lp->lock, flags);
594 /* Reenable when at least 1 packet of size MTU present */
595 SMC_SET_FIFO_TDA((SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
596 lp->tx_throttle = 1;
597 netif_stop_queue(dev);
598 spin_unlock_irqrestore(&lp->lock, flags);
599 }
600
601 /* Drop packets when we run out of space in TX FIFO
602 * Account for overhead required for:
603 *
604 * Tx command words 8 bytes
605 * Start offset 15 bytes
606 * End padding 15 bytes
607 */
608 if (unlikely(free < (skb->len + 8 + 15 + 15))) {
609 printk("%s: No Tx free space %d < %d\n",
610 dev->name, free, skb->len);
611 lp->pending_tx_skb = NULL;
612 dev->stats.tx_errors++;
613 dev->stats.tx_dropped++;
614 dev_kfree_skb(skb);
615 return 0;
616 }
617
618 #ifdef SMC_USE_DMA
619 {
620 /* If the DMA is already running then defer this packet Tx until
621 * the DMA IRQ starts it
622 */
623 spin_lock_irqsave(&lp->lock, flags);
624 if (lp->txdma_active) {
625 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: Tx DMA running, deferring packet\n", dev->name);
626 lp->pending_tx_skb = skb;
627 netif_stop_queue(dev);
628 spin_unlock_irqrestore(&lp->lock, flags);
629 return 0;
630 } else {
631 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: Activating Tx DMA\n", dev->name);
632 lp->txdma_active = 1;
633 }
634 spin_unlock_irqrestore(&lp->lock, flags);
635 }
636 #endif
637 lp->pending_tx_skb = skb;
638 smc911x_hardware_send_pkt(dev);
639
640 return 0;
641 }
642
643 /*
644 * This handles a TX status interrupt, which is only called when:
645 * - a TX error occurred, or
646 * - TX of a packet completed.
647 */
648 static void smc911x_tx(struct net_device *dev)
649 {
650 unsigned long ioaddr = dev->base_addr;
651 struct smc911x_local *lp = netdev_priv(dev);
652 unsigned int tx_status;
653
654 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n",
655 dev->name, __FUNCTION__);
656
657 /* Collect the TX status */
658 while (((SMC_GET_TX_FIFO_INF() & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
659 DBG(SMC_DEBUG_TX, "%s: Tx stat FIFO used 0x%04x\n",
660 dev->name,
661 (SMC_GET_TX_FIFO_INF() & TX_FIFO_INF_TSUSED_) >> 16);
662 tx_status = SMC_GET_TX_STS_FIFO();
663 dev->stats.tx_packets++;
664 dev->stats.tx_bytes+=tx_status>>16;
665 DBG(SMC_DEBUG_TX, "%s: Tx FIFO tag 0x%04x status 0x%04x\n",
666 dev->name, (tx_status & 0xffff0000) >> 16,
667 tx_status & 0x0000ffff);
668 /* count Tx errors, but ignore lost carrier errors when in
669 * full-duplex mode */
670 if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
671 !(tx_status & 0x00000306))) {
672 dev->stats.tx_errors++;
673 }
674 if (tx_status & TX_STS_MANY_COLL_) {
675 dev->stats.collisions+=16;
676 dev->stats.tx_aborted_errors++;
677 } else {
678 dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
679 }
680 /* carrier error only has meaning for half-duplex communication */
681 if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
682 !lp->ctl_rfduplx) {
683 dev->stats.tx_carrier_errors++;
684 }
685 if (tx_status & TX_STS_LATE_COLL_) {
686 dev->stats.collisions++;
687 dev->stats.tx_aborted_errors++;
688 }
689 }
690 }
691
692
693 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
694 /*
695 * Reads a register from the MII Management serial interface
696 */
697
698 static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
699 {
700 unsigned long ioaddr = dev->base_addr;
701 unsigned int phydata;
702
703 SMC_GET_MII(phyreg, phyaddr, phydata);
704
705 DBG(SMC_DEBUG_MISC, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
706 __FUNCTION__, phyaddr, phyreg, phydata);
707 return phydata;
708 }
709
710
711 /*
712 * Writes a register to the MII Management serial interface
713 */
714 static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
715 int phydata)
716 {
717 unsigned long ioaddr = dev->base_addr;
718
719 DBG(SMC_DEBUG_MISC, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
720 __FUNCTION__, phyaddr, phyreg, phydata);
721
722 SMC_SET_MII(phyreg, phyaddr, phydata);
723 }
724
725 /*
726 * Finds and reports the PHY address (115 and 117 have external
727 * PHY interface 118 has internal only
728 */
729 static void smc911x_phy_detect(struct net_device *dev)
730 {
731 unsigned long ioaddr = dev->base_addr;
732 struct smc911x_local *lp = netdev_priv(dev);
733 int phyaddr;
734 unsigned int cfg, id1, id2;
735
736 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
737
738 lp->phy_type = 0;
739
740 /*
741 * Scan all 32 PHY addresses if necessary, starting at
742 * PHY#1 to PHY#31, and then PHY#0 last.
743 */
744 switch(lp->version) {
745 case 0x115:
746 case 0x117:
747 cfg = SMC_GET_HW_CFG();
748 if (cfg & HW_CFG_EXT_PHY_DET_) {
749 cfg &= ~HW_CFG_PHY_CLK_SEL_;
750 cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
751 SMC_SET_HW_CFG(cfg);
752 udelay(10); /* Wait for clocks to stop */
753
754 cfg |= HW_CFG_EXT_PHY_EN_;
755 SMC_SET_HW_CFG(cfg);
756 udelay(10); /* Wait for clocks to stop */
757
758 cfg &= ~HW_CFG_PHY_CLK_SEL_;
759 cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
760 SMC_SET_HW_CFG(cfg);
761 udelay(10); /* Wait for clocks to stop */
762
763 cfg |= HW_CFG_SMI_SEL_;
764 SMC_SET_HW_CFG(cfg);
765
766 for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
767
768 /* Read the PHY identifiers */
769 SMC_GET_PHY_ID1(phyaddr & 31, id1);
770 SMC_GET_PHY_ID2(phyaddr & 31, id2);
771
772 /* Make sure it is a valid identifier */
773 if (id1 != 0x0000 && id1 != 0xffff &&
774 id1 != 0x8000 && id2 != 0x0000 &&
775 id2 != 0xffff && id2 != 0x8000) {
776 /* Save the PHY's address */
777 lp->mii.phy_id = phyaddr & 31;
778 lp->phy_type = id1 << 16 | id2;
779 break;
780 }
781 }
782 }
783 default:
784 /* Internal media only */
785 SMC_GET_PHY_ID1(1, id1);
786 SMC_GET_PHY_ID2(1, id2);
787 /* Save the PHY's address */
788 lp->mii.phy_id = 1;
789 lp->phy_type = id1 << 16 | id2;
790 }
791
792 DBG(SMC_DEBUG_MISC, "%s: phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%d\n",
793 dev->name, id1, id2, lp->mii.phy_id);
794 }
795
796 /*
797 * Sets the PHY to a configuration as determined by the user.
798 * Called with spin_lock held.
799 */
800 static int smc911x_phy_fixed(struct net_device *dev)
801 {
802 struct smc911x_local *lp = netdev_priv(dev);
803 unsigned long ioaddr = dev->base_addr;
804 int phyaddr = lp->mii.phy_id;
805 int bmcr;
806
807 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
808
809 /* Enter Link Disable state */
810 SMC_GET_PHY_BMCR(phyaddr, bmcr);
811 bmcr |= BMCR_PDOWN;
812 SMC_SET_PHY_BMCR(phyaddr, bmcr);
813
814 /*
815 * Set our fixed capabilities
816 * Disable auto-negotiation
817 */
818 bmcr &= ~BMCR_ANENABLE;
819 if (lp->ctl_rfduplx)
820 bmcr |= BMCR_FULLDPLX;
821
822 if (lp->ctl_rspeed == 100)
823 bmcr |= BMCR_SPEED100;
824
825 /* Write our capabilities to the phy control register */
826 SMC_SET_PHY_BMCR(phyaddr, bmcr);
827
828 /* Re-Configure the Receive/Phy Control register */
829 bmcr &= ~BMCR_PDOWN;
830 SMC_SET_PHY_BMCR(phyaddr, bmcr);
831
832 return 1;
833 }
834
835 /*
836 * smc911x_phy_reset - reset the phy
837 * @dev: net device
838 * @phy: phy address
839 *
840 * Issue a software reset for the specified PHY and
841 * wait up to 100ms for the reset to complete. We should
842 * not access the PHY for 50ms after issuing the reset.
843 *
844 * The time to wait appears to be dependent on the PHY.
845 *
846 */
847 static int smc911x_phy_reset(struct net_device *dev, int phy)
848 {
849 struct smc911x_local *lp = netdev_priv(dev);
850 unsigned long ioaddr = dev->base_addr;
851 int timeout;
852 unsigned long flags;
853 unsigned int reg;
854
855 DBG(SMC_DEBUG_FUNC, "%s: --> %s()\n", dev->name, __FUNCTION__);
856
857 spin_lock_irqsave(&lp->lock, flags);
858 reg = SMC_GET_PMT_CTRL();
859 reg &= ~0xfffff030;
860 reg |= PMT_CTRL_PHY_RST_;
861 SMC_SET_PMT_CTRL(reg);
862 spin_unlock_irqrestore(&lp->lock, flags);
863 for (timeout = 2; timeout; timeout--) {
864 msleep(50);
865 spin_lock_irqsave(&lp->lock, flags);
866 reg = SMC_GET_PMT_CTRL();
867 spin_unlock_irqrestore(&lp->lock, flags);
868 if (!(reg & PMT_CTRL_PHY_RST_)) {
869 /* extra delay required because the phy may
870 * not be completed with its reset
871 * when PHY_BCR_RESET_ is cleared. 256us
872 * should suffice, but use 500us to be safe
873 */
874 udelay(500);
875 break;
876 }
877 }
878
879 return reg & PMT_CTRL_PHY_RST_;
880 }
881
882 /*
883 * smc911x_phy_powerdown - powerdown phy
884 * @dev: net device
885 * @phy: phy address
886 *
887 * Power down the specified PHY
888 */
889 static void smc911x_phy_powerdown(struct net_device *dev, int phy)
890 {
891 unsigned long ioaddr = dev->base_addr;
892 unsigned int bmcr;
893
894 /* Enter Link Disable state */
895 SMC_GET_PHY_BMCR(phy, bmcr);
896 bmcr |= BMCR_PDOWN;
897 SMC_SET_PHY_BMCR(phy, bmcr);
898 }
899
900 /*
901 * smc911x_phy_check_media - check the media status and adjust BMCR
902 * @dev: net device
903 * @init: set true for initialisation
904 *
905 * Select duplex mode depending on negotiation state. This
906 * also updates our carrier state.
907 */
908 static void smc911x_phy_check_media(struct net_device *dev, int init)
909 {
910 struct smc911x_local *lp = netdev_priv(dev);
911 unsigned long ioaddr = dev->base_addr;
912 int phyaddr = lp->mii.phy_id;
913 unsigned int bmcr, cr;
914
915 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
916
917 if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
918 /* duplex state has changed */
919 SMC_GET_PHY_BMCR(phyaddr, bmcr);
920 SMC_GET_MAC_CR(cr);
921 if (lp->mii.full_duplex) {
922 DBG(SMC_DEBUG_MISC, "%s: Configuring for full-duplex mode\n", dev->name);
923 bmcr |= BMCR_FULLDPLX;
924 cr |= MAC_CR_RCVOWN_;
925 } else {
926 DBG(SMC_DEBUG_MISC, "%s: Configuring for half-duplex mode\n", dev->name);
927 bmcr &= ~BMCR_FULLDPLX;
928 cr &= ~MAC_CR_RCVOWN_;
929 }
930 SMC_SET_PHY_BMCR(phyaddr, bmcr);
931 SMC_SET_MAC_CR(cr);
932 }
933 }
934
935 /*
936 * Configures the specified PHY through the MII management interface
937 * using Autonegotiation.
938 * Calls smc911x_phy_fixed() if the user has requested a certain config.
939 * If RPC ANEG bit is set, the media selection is dependent purely on
940 * the selection by the MII (either in the MII BMCR reg or the result
941 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
942 * is controlled by the RPC SPEED and RPC DPLX bits.
943 */
944 static void smc911x_phy_configure(struct work_struct *work)
945 {
946 struct smc911x_local *lp = container_of(work, struct smc911x_local,
947 phy_configure);
948 struct net_device *dev = lp->netdev;
949 unsigned long ioaddr = dev->base_addr;
950 int phyaddr = lp->mii.phy_id;
951 int my_phy_caps; /* My PHY capabilities */
952 int my_ad_caps; /* My Advertised capabilities */
953 int status;
954 unsigned long flags;
955
956 DBG(SMC_DEBUG_FUNC, "%s: --> %s()\n", dev->name, __FUNCTION__);
957
958 /*
959 * We should not be called if phy_type is zero.
960 */
961 if (lp->phy_type == 0)
962 goto smc911x_phy_configure_exit_nolock;
963
964 if (smc911x_phy_reset(dev, phyaddr)) {
965 printk("%s: PHY reset timed out\n", dev->name);
966 goto smc911x_phy_configure_exit_nolock;
967 }
968 spin_lock_irqsave(&lp->lock, flags);
969
970 /*
971 * Enable PHY Interrupts (for register 18)
972 * Interrupts listed here are enabled
973 */
974 SMC_SET_PHY_INT_MASK(phyaddr, PHY_INT_MASK_ENERGY_ON_ |
975 PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
976 PHY_INT_MASK_LINK_DOWN_);
977
978 /* If the user requested no auto neg, then go set his request */
979 if (lp->mii.force_media) {
980 smc911x_phy_fixed(dev);
981 goto smc911x_phy_configure_exit;
982 }
983
984 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
985 SMC_GET_PHY_BMSR(phyaddr, my_phy_caps);
986 if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
987 printk(KERN_INFO "Auto negotiation NOT supported\n");
988 smc911x_phy_fixed(dev);
989 goto smc911x_phy_configure_exit;
990 }
991
992 /* CSMA capable w/ both pauses */
993 my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
994
995 if (my_phy_caps & BMSR_100BASE4)
996 my_ad_caps |= ADVERTISE_100BASE4;
997 if (my_phy_caps & BMSR_100FULL)
998 my_ad_caps |= ADVERTISE_100FULL;
999 if (my_phy_caps & BMSR_100HALF)
1000 my_ad_caps |= ADVERTISE_100HALF;
1001 if (my_phy_caps & BMSR_10FULL)
1002 my_ad_caps |= ADVERTISE_10FULL;
1003 if (my_phy_caps & BMSR_10HALF)
1004 my_ad_caps |= ADVERTISE_10HALF;
1005
1006 /* Disable capabilities not selected by our user */
1007 if (lp->ctl_rspeed != 100)
1008 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
1009
1010 if (!lp->ctl_rfduplx)
1011 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
1012
1013 /* Update our Auto-Neg Advertisement Register */
1014 SMC_SET_PHY_MII_ADV(phyaddr, my_ad_caps);
1015 lp->mii.advertising = my_ad_caps;
1016
1017 /*
1018 * Read the register back. Without this, it appears that when
1019 * auto-negotiation is restarted, sometimes it isn't ready and
1020 * the link does not come up.
1021 */
1022 udelay(10);
1023 SMC_GET_PHY_MII_ADV(phyaddr, status);
1024
1025 DBG(SMC_DEBUG_MISC, "%s: phy caps=0x%04x\n", dev->name, my_phy_caps);
1026 DBG(SMC_DEBUG_MISC, "%s: phy advertised caps=0x%04x\n", dev->name, my_ad_caps);
1027
1028 /* Restart auto-negotiation process in order to advertise my caps */
1029 SMC_SET_PHY_BMCR(phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
1030
1031 smc911x_phy_check_media(dev, 1);
1032
1033 smc911x_phy_configure_exit:
1034 spin_unlock_irqrestore(&lp->lock, flags);
1035 smc911x_phy_configure_exit_nolock:
1036 lp->work_pending = 0;
1037 }
1038
1039 /*
1040 * smc911x_phy_interrupt
1041 *
1042 * Purpose: Handle interrupts relating to PHY register 18. This is
1043 * called from the "hard" interrupt handler under our private spinlock.
1044 */
1045 static void smc911x_phy_interrupt(struct net_device *dev)
1046 {
1047 struct smc911x_local *lp = netdev_priv(dev);
1048 unsigned long ioaddr = dev->base_addr;
1049 int phyaddr = lp->mii.phy_id;
1050 int status;
1051
1052 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1053
1054 if (lp->phy_type == 0)
1055 return;
1056
1057 smc911x_phy_check_media(dev, 0);
1058 /* read to clear status bits */
1059 SMC_GET_PHY_INT_SRC(phyaddr,status);
1060 DBG(SMC_DEBUG_MISC, "%s: PHY interrupt status 0x%04x\n",
1061 dev->name, status & 0xffff);
1062 DBG(SMC_DEBUG_MISC, "%s: AFC_CFG 0x%08x\n",
1063 dev->name, SMC_GET_AFC_CFG());
1064 }
1065
1066 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1067
1068 /*
1069 * This is the main routine of the driver, to handle the device when
1070 * it needs some attention.
1071 */
1072 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1073 {
1074 struct net_device *dev = dev_id;
1075 unsigned long ioaddr = dev->base_addr;
1076 struct smc911x_local *lp = netdev_priv(dev);
1077 unsigned int status, mask, timeout;
1078 unsigned int rx_overrun=0, cr, pkts;
1079 unsigned long flags;
1080
1081 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1082
1083 spin_lock_irqsave(&lp->lock, flags);
1084
1085 /* Spurious interrupt check */
1086 if ((SMC_GET_IRQ_CFG() & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1087 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1088 spin_unlock_irqrestore(&lp->lock, flags);
1089 return IRQ_NONE;
1090 }
1091
1092 mask = SMC_GET_INT_EN();
1093 SMC_SET_INT_EN(0);
1094
1095 /* set a timeout value, so I don't stay here forever */
1096 timeout = 8;
1097
1098
1099 do {
1100 status = SMC_GET_INT();
1101
1102 DBG(SMC_DEBUG_MISC, "%s: INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1103 dev->name, status, mask, status & ~mask);
1104
1105 status &= mask;
1106 if (!status)
1107 break;
1108
1109 /* Handle SW interrupt condition */
1110 if (status & INT_STS_SW_INT_) {
1111 SMC_ACK_INT(INT_STS_SW_INT_);
1112 mask &= ~INT_EN_SW_INT_EN_;
1113 }
1114 /* Handle various error conditions */
1115 if (status & INT_STS_RXE_) {
1116 SMC_ACK_INT(INT_STS_RXE_);
1117 dev->stats.rx_errors++;
1118 }
1119 if (status & INT_STS_RXDFH_INT_) {
1120 SMC_ACK_INT(INT_STS_RXDFH_INT_);
1121 dev->stats.rx_dropped+=SMC_GET_RX_DROP();
1122 }
1123 /* Undocumented interrupt-what is the right thing to do here? */
1124 if (status & INT_STS_RXDF_INT_) {
1125 SMC_ACK_INT(INT_STS_RXDF_INT_);
1126 }
1127
1128 /* Rx Data FIFO exceeds set level */
1129 if (status & INT_STS_RDFL_) {
1130 if (IS_REV_A(lp->revision)) {
1131 rx_overrun=1;
1132 SMC_GET_MAC_CR(cr);
1133 cr &= ~MAC_CR_RXEN_;
1134 SMC_SET_MAC_CR(cr);
1135 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1136 dev->stats.rx_errors++;
1137 dev->stats.rx_fifo_errors++;
1138 }
1139 SMC_ACK_INT(INT_STS_RDFL_);
1140 }
1141 if (status & INT_STS_RDFO_) {
1142 if (!IS_REV_A(lp->revision)) {
1143 SMC_GET_MAC_CR(cr);
1144 cr &= ~MAC_CR_RXEN_;
1145 SMC_SET_MAC_CR(cr);
1146 rx_overrun=1;
1147 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1148 dev->stats.rx_errors++;
1149 dev->stats.rx_fifo_errors++;
1150 }
1151 SMC_ACK_INT(INT_STS_RDFO_);
1152 }
1153 /* Handle receive condition */
1154 if ((status & INT_STS_RSFL_) || rx_overrun) {
1155 unsigned int fifo;
1156 DBG(SMC_DEBUG_RX, "%s: RX irq\n", dev->name);
1157 fifo = SMC_GET_RX_FIFO_INF();
1158 pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1159 DBG(SMC_DEBUG_RX, "%s: Rx FIFO pkts %d, bytes %d\n",
1160 dev->name, pkts, fifo & 0xFFFF );
1161 if (pkts != 0) {
1162 #ifdef SMC_USE_DMA
1163 unsigned int fifo;
1164 if (lp->rxdma_active){
1165 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1166 "%s: RX DMA active\n", dev->name);
1167 /* The DMA is already running so up the IRQ threshold */
1168 fifo = SMC_GET_FIFO_INT() & ~0xFF;
1169 fifo |= pkts & 0xFF;
1170 DBG(SMC_DEBUG_RX,
1171 "%s: Setting RX stat FIFO threshold to %d\n",
1172 dev->name, fifo & 0xff);
1173 SMC_SET_FIFO_INT(fifo);
1174 } else
1175 #endif
1176 smc911x_rcv(dev);
1177 }
1178 SMC_ACK_INT(INT_STS_RSFL_);
1179 }
1180 /* Handle transmit FIFO available */
1181 if (status & INT_STS_TDFA_) {
1182 DBG(SMC_DEBUG_TX, "%s: TX data FIFO space available irq\n", dev->name);
1183 SMC_SET_FIFO_TDA(0xFF);
1184 lp->tx_throttle = 0;
1185 #ifdef SMC_USE_DMA
1186 if (!lp->txdma_active)
1187 #endif
1188 netif_wake_queue(dev);
1189 SMC_ACK_INT(INT_STS_TDFA_);
1190 }
1191 /* Handle transmit done condition */
1192 #if 1
1193 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1194 DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC,
1195 "%s: Tx stat FIFO limit (%d) /GPT irq\n",
1196 dev->name, (SMC_GET_FIFO_INT() & 0x00ff0000) >> 16);
1197 smc911x_tx(dev);
1198 SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
1199 SMC_ACK_INT(INT_STS_TSFL_);
1200 SMC_ACK_INT(INT_STS_TSFL_ | INT_STS_GPT_INT_);
1201 }
1202 #else
1203 if (status & INT_STS_TSFL_) {
1204 DBG(SMC_DEBUG_TX, "%s: TX status FIFO limit (%d) irq \n", dev->name, );
1205 smc911x_tx(dev);
1206 SMC_ACK_INT(INT_STS_TSFL_);
1207 }
1208
1209 if (status & INT_STS_GPT_INT_) {
1210 DBG(SMC_DEBUG_RX, "%s: IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1211 dev->name,
1212 SMC_GET_IRQ_CFG(),
1213 SMC_GET_FIFO_INT(),
1214 SMC_GET_RX_CFG());
1215 DBG(SMC_DEBUG_RX, "%s: Rx Stat FIFO Used 0x%02x "
1216 "Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1217 dev->name,
1218 (SMC_GET_RX_FIFO_INF() & 0x00ff0000) >> 16,
1219 SMC_GET_RX_FIFO_INF() & 0xffff,
1220 SMC_GET_RX_STS_FIFO_PEEK());
1221 SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
1222 SMC_ACK_INT(INT_STS_GPT_INT_);
1223 }
1224 #endif
1225
1226 /* Handle PHY interupt condition */
1227 if (status & INT_STS_PHY_INT_) {
1228 DBG(SMC_DEBUG_MISC, "%s: PHY irq\n", dev->name);
1229 smc911x_phy_interrupt(dev);
1230 SMC_ACK_INT(INT_STS_PHY_INT_);
1231 }
1232 } while (--timeout);
1233
1234 /* restore mask state */
1235 SMC_SET_INT_EN(mask);
1236
1237 DBG(SMC_DEBUG_MISC, "%s: Interrupt done (%d loops)\n",
1238 dev->name, 8-timeout);
1239
1240 spin_unlock_irqrestore(&lp->lock, flags);
1241
1242 DBG(3, "%s: Interrupt done (%d loops)\n", dev->name, 8-timeout);
1243
1244 return IRQ_HANDLED;
1245 }
1246
1247 #ifdef SMC_USE_DMA
1248 static void
1249 smc911x_tx_dma_irq(int dma, void *data)
1250 {
1251 struct net_device *dev = (struct net_device *)data;
1252 struct smc911x_local *lp = netdev_priv(dev);
1253 struct sk_buff *skb = lp->current_tx_skb;
1254 unsigned long flags;
1255
1256 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1257
1258 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: TX DMA irq handler\n", dev->name);
1259 /* Clear the DMA interrupt sources */
1260 SMC_DMA_ACK_IRQ(dev, dma);
1261 BUG_ON(skb == NULL);
1262 dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1263 dev->trans_start = jiffies;
1264 dev_kfree_skb_irq(skb);
1265 lp->current_tx_skb = NULL;
1266 if (lp->pending_tx_skb != NULL)
1267 smc911x_hardware_send_pkt(dev);
1268 else {
1269 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1270 "%s: No pending Tx packets. DMA disabled\n", dev->name);
1271 spin_lock_irqsave(&lp->lock, flags);
1272 lp->txdma_active = 0;
1273 if (!lp->tx_throttle) {
1274 netif_wake_queue(dev);
1275 }
1276 spin_unlock_irqrestore(&lp->lock, flags);
1277 }
1278
1279 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1280 "%s: TX DMA irq completed\n", dev->name);
1281 }
1282 static void
1283 smc911x_rx_dma_irq(int dma, void *data)
1284 {
1285 struct net_device *dev = (struct net_device *)data;
1286 unsigned long ioaddr = dev->base_addr;
1287 struct smc911x_local *lp = netdev_priv(dev);
1288 struct sk_buff *skb = lp->current_rx_skb;
1289 unsigned long flags;
1290 unsigned int pkts;
1291
1292 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1293 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, "%s: RX DMA irq handler\n", dev->name);
1294 /* Clear the DMA interrupt sources */
1295 SMC_DMA_ACK_IRQ(dev, dma);
1296 dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1297 BUG_ON(skb == NULL);
1298 lp->current_rx_skb = NULL;
1299 PRINT_PKT(skb->data, skb->len);
1300 dev->last_rx = jiffies;
1301 skb->protocol = eth_type_trans(skb, dev);
1302 netif_rx(skb);
1303 dev->stats.rx_packets++;
1304 dev->stats.rx_bytes += skb->len;
1305
1306 spin_lock_irqsave(&lp->lock, flags);
1307 pkts = (SMC_GET_RX_FIFO_INF() & RX_FIFO_INF_RXSUSED_) >> 16;
1308 if (pkts != 0) {
1309 smc911x_rcv(dev);
1310 }else {
1311 lp->rxdma_active = 0;
1312 }
1313 spin_unlock_irqrestore(&lp->lock, flags);
1314 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1315 "%s: RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1316 dev->name, pkts);
1317 }
1318 #endif /* SMC_USE_DMA */
1319
1320 #ifdef CONFIG_NET_POLL_CONTROLLER
1321 /*
1322 * Polling receive - used by netconsole and other diagnostic tools
1323 * to allow network i/o with interrupts disabled.
1324 */
1325 static void smc911x_poll_controller(struct net_device *dev)
1326 {
1327 disable_irq(dev->irq);
1328 smc911x_interrupt(dev->irq, dev);
1329 enable_irq(dev->irq);
1330 }
1331 #endif
1332
1333 /* Our watchdog timed out. Called by the networking layer */
1334 static void smc911x_timeout(struct net_device *dev)
1335 {
1336 struct smc911x_local *lp = netdev_priv(dev);
1337 unsigned long ioaddr = dev->base_addr;
1338 int status, mask;
1339 unsigned long flags;
1340
1341 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1342
1343 spin_lock_irqsave(&lp->lock, flags);
1344 status = SMC_GET_INT();
1345 mask = SMC_GET_INT_EN();
1346 spin_unlock_irqrestore(&lp->lock, flags);
1347 DBG(SMC_DEBUG_MISC, "%s: INT 0x%02x MASK 0x%02x \n",
1348 dev->name, status, mask);
1349
1350 /* Dump the current TX FIFO contents and restart */
1351 mask = SMC_GET_TX_CFG();
1352 SMC_SET_TX_CFG(mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1353 /*
1354 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1355 * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1356 * which calls schedule(). Hence we use a work queue.
1357 */
1358 if (lp->phy_type != 0) {
1359 if (schedule_work(&lp->phy_configure)) {
1360 lp->work_pending = 1;
1361 }
1362 }
1363
1364 /* We can accept TX packets again */
1365 dev->trans_start = jiffies;
1366 netif_wake_queue(dev);
1367 }
1368
1369 /*
1370 * This routine will, depending on the values passed to it,
1371 * either make it accept multicast packets, go into
1372 * promiscuous mode (for TCPDUMP and cousins) or accept
1373 * a select set of multicast packets
1374 */
1375 static void smc911x_set_multicast_list(struct net_device *dev)
1376 {
1377 struct smc911x_local *lp = netdev_priv(dev);
1378 unsigned long ioaddr = dev->base_addr;
1379 unsigned int multicast_table[2];
1380 unsigned int mcr, update_multicast = 0;
1381 unsigned long flags;
1382 /* table for flipping the order of 5 bits */
1383 static const unsigned char invert5[] =
1384 {0x00, 0x10, 0x08, 0x18, 0x04, 0x14, 0x0C, 0x1C,
1385 0x02, 0x12, 0x0A, 0x1A, 0x06, 0x16, 0x0E, 0x1E,
1386 0x01, 0x11, 0x09, 0x19, 0x05, 0x15, 0x0D, 0x1D,
1387 0x03, 0x13, 0x0B, 0x1B, 0x07, 0x17, 0x0F, 0x1F};
1388
1389
1390 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1391
1392 spin_lock_irqsave(&lp->lock, flags);
1393 SMC_GET_MAC_CR(mcr);
1394 spin_unlock_irqrestore(&lp->lock, flags);
1395
1396 if (dev->flags & IFF_PROMISC) {
1397
1398 DBG(SMC_DEBUG_MISC, "%s: RCR_PRMS\n", dev->name);
1399 mcr |= MAC_CR_PRMS_;
1400 }
1401 /*
1402 * Here, I am setting this to accept all multicast packets.
1403 * I don't need to zero the multicast table, because the flag is
1404 * checked before the table is
1405 */
1406 else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) {
1407 DBG(SMC_DEBUG_MISC, "%s: RCR_ALMUL\n", dev->name);
1408 mcr |= MAC_CR_MCPAS_;
1409 }
1410
1411 /*
1412 * This sets the internal hardware table to filter out unwanted
1413 * multicast packets before they take up memory.
1414 *
1415 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1416 * address are the offset into the table. If that bit is 1, then the
1417 * multicast packet is accepted. Otherwise, it's dropped silently.
1418 *
1419 * To use the 6 bits as an offset into the table, the high 1 bit is
1420 * the number of the 32 bit register, while the low 5 bits are the bit
1421 * within that register.
1422 */
1423 else if (dev->mc_count) {
1424 int i;
1425 struct dev_mc_list *cur_addr;
1426
1427 /* Set the Hash perfec mode */
1428 mcr |= MAC_CR_HPFILT_;
1429
1430 /* start with a table of all zeros: reject all */
1431 memset(multicast_table, 0, sizeof(multicast_table));
1432
1433 cur_addr = dev->mc_list;
1434 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
1435 int position;
1436
1437 /* do we have a pointer here? */
1438 if (!cur_addr)
1439 break;
1440 /* make sure this is a multicast address -
1441 shouldn't this be a given if we have it here ? */
1442 if (!(*cur_addr->dmi_addr & 1))
1443 continue;
1444
1445 /* only use the low order bits */
1446 position = crc32_le(~0, cur_addr->dmi_addr, 6) & 0x3f;
1447
1448 /* do some messy swapping to put the bit in the right spot */
1449 multicast_table[invert5[position&0x1F]&0x1] |=
1450 (1<<invert5[(position>>1)&0x1F]);
1451 }
1452
1453 /* be sure I get rid of flags I might have set */
1454 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1455
1456 /* now, the table can be loaded into the chipset */
1457 update_multicast = 1;
1458 } else {
1459 DBG(SMC_DEBUG_MISC, "%s: ~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n",
1460 dev->name);
1461 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1462
1463 /*
1464 * since I'm disabling all multicast entirely, I need to
1465 * clear the multicast list
1466 */
1467 memset(multicast_table, 0, sizeof(multicast_table));
1468 update_multicast = 1;
1469 }
1470
1471 spin_lock_irqsave(&lp->lock, flags);
1472 SMC_SET_MAC_CR(mcr);
1473 if (update_multicast) {
1474 DBG(SMC_DEBUG_MISC,
1475 "%s: update mcast hash table 0x%08x 0x%08x\n",
1476 dev->name, multicast_table[0], multicast_table[1]);
1477 SMC_SET_HASHL(multicast_table[0]);
1478 SMC_SET_HASHH(multicast_table[1]);
1479 }
1480 spin_unlock_irqrestore(&lp->lock, flags);
1481 }
1482
1483
1484 /*
1485 * Open and Initialize the board
1486 *
1487 * Set up everything, reset the card, etc..
1488 */
1489 static int
1490 smc911x_open(struct net_device *dev)
1491 {
1492 struct smc911x_local *lp = netdev_priv(dev);
1493
1494 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1495
1496 /*
1497 * Check that the address is valid. If its not, refuse
1498 * to bring the device up. The user must specify an
1499 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1500 */
1501 if (!is_valid_ether_addr(dev->dev_addr)) {
1502 PRINTK("%s: no valid ethernet hw addr\n", __FUNCTION__);
1503 return -EINVAL;
1504 }
1505
1506 /* reset the hardware */
1507 smc911x_reset(dev);
1508
1509 /* Configure the PHY, initialize the link state */
1510 smc911x_phy_configure(&lp->phy_configure);
1511
1512 /* Turn on Tx + Rx */
1513 smc911x_enable(dev);
1514
1515 netif_start_queue(dev);
1516
1517 return 0;
1518 }
1519
1520 /*
1521 * smc911x_close
1522 *
1523 * this makes the board clean up everything that it can
1524 * and not talk to the outside world. Caused by
1525 * an 'ifconfig ethX down'
1526 */
1527 static int smc911x_close(struct net_device *dev)
1528 {
1529 struct smc911x_local *lp = netdev_priv(dev);
1530
1531 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1532
1533 netif_stop_queue(dev);
1534 netif_carrier_off(dev);
1535
1536 /* clear everything */
1537 smc911x_shutdown(dev);
1538
1539 if (lp->phy_type != 0) {
1540 /* We need to ensure that no calls to
1541 * smc911x_phy_configure are pending.
1542
1543 * flush_scheduled_work() cannot be called because we
1544 * are running with the netlink semaphore held (from
1545 * devinet_ioctl()) and the pending work queue
1546 * contains linkwatch_event() (scheduled by
1547 * netif_carrier_off() above). linkwatch_event() also
1548 * wants the netlink semaphore.
1549 */
1550 while (lp->work_pending)
1551 schedule();
1552 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1553 }
1554
1555 if (lp->pending_tx_skb) {
1556 dev_kfree_skb(lp->pending_tx_skb);
1557 lp->pending_tx_skb = NULL;
1558 }
1559
1560 return 0;
1561 }
1562
1563 /*
1564 * Ethtool support
1565 */
1566 static int
1567 smc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1568 {
1569 struct smc911x_local *lp = netdev_priv(dev);
1570 unsigned long ioaddr = dev->base_addr;
1571 int ret, status;
1572 unsigned long flags;
1573
1574 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1575 cmd->maxtxpkt = 1;
1576 cmd->maxrxpkt = 1;
1577
1578 if (lp->phy_type != 0) {
1579 spin_lock_irqsave(&lp->lock, flags);
1580 ret = mii_ethtool_gset(&lp->mii, cmd);
1581 spin_unlock_irqrestore(&lp->lock, flags);
1582 } else {
1583 cmd->supported = SUPPORTED_10baseT_Half |
1584 SUPPORTED_10baseT_Full |
1585 SUPPORTED_TP | SUPPORTED_AUI;
1586
1587 if (lp->ctl_rspeed == 10)
1588 cmd->speed = SPEED_10;
1589 else if (lp->ctl_rspeed == 100)
1590 cmd->speed = SPEED_100;
1591
1592 cmd->autoneg = AUTONEG_DISABLE;
1593 if (lp->mii.phy_id==1)
1594 cmd->transceiver = XCVR_INTERNAL;
1595 else
1596 cmd->transceiver = XCVR_EXTERNAL;
1597 cmd->port = 0;
1598 SMC_GET_PHY_SPECIAL(lp->mii.phy_id, status);
1599 cmd->duplex =
1600 (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1601 DUPLEX_FULL : DUPLEX_HALF;
1602 ret = 0;
1603 }
1604
1605 return ret;
1606 }
1607
1608 static int
1609 smc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1610 {
1611 struct smc911x_local *lp = netdev_priv(dev);
1612 int ret;
1613 unsigned long flags;
1614
1615 if (lp->phy_type != 0) {
1616 spin_lock_irqsave(&lp->lock, flags);
1617 ret = mii_ethtool_sset(&lp->mii, cmd);
1618 spin_unlock_irqrestore(&lp->lock, flags);
1619 } else {
1620 if (cmd->autoneg != AUTONEG_DISABLE ||
1621 cmd->speed != SPEED_10 ||
1622 (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1623 (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1624 return -EINVAL;
1625
1626 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1627
1628 ret = 0;
1629 }
1630
1631 return ret;
1632 }
1633
1634 static void
1635 smc911x_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1636 {
1637 strncpy(info->driver, CARDNAME, sizeof(info->driver));
1638 strncpy(info->version, version, sizeof(info->version));
1639 strncpy(info->bus_info, dev->dev.parent->bus_id, sizeof(info->bus_info));
1640 }
1641
1642 static int smc911x_ethtool_nwayreset(struct net_device *dev)
1643 {
1644 struct smc911x_local *lp = netdev_priv(dev);
1645 int ret = -EINVAL;
1646 unsigned long flags;
1647
1648 if (lp->phy_type != 0) {
1649 spin_lock_irqsave(&lp->lock, flags);
1650 ret = mii_nway_restart(&lp->mii);
1651 spin_unlock_irqrestore(&lp->lock, flags);
1652 }
1653
1654 return ret;
1655 }
1656
1657 static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1658 {
1659 struct smc911x_local *lp = netdev_priv(dev);
1660 return lp->msg_enable;
1661 }
1662
1663 static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1664 {
1665 struct smc911x_local *lp = netdev_priv(dev);
1666 lp->msg_enable = level;
1667 }
1668
1669 static int smc911x_ethtool_getregslen(struct net_device *dev)
1670 {
1671 /* System regs + MAC regs + PHY regs */
1672 return (((E2P_CMD - ID_REV)/4 + 1) +
1673 (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1674 }
1675
1676 static void smc911x_ethtool_getregs(struct net_device *dev,
1677 struct ethtool_regs* regs, void *buf)
1678 {
1679 unsigned long ioaddr = dev->base_addr;
1680 struct smc911x_local *lp = netdev_priv(dev);
1681 unsigned long flags;
1682 u32 reg,i,j=0;
1683 u32 *data = (u32*)buf;
1684
1685 regs->version = lp->version;
1686 for(i=ID_REV;i<=E2P_CMD;i+=4) {
1687 data[j++] = SMC_inl(ioaddr,i);
1688 }
1689 for(i=MAC_CR;i<=WUCSR;i++) {
1690 spin_lock_irqsave(&lp->lock, flags);
1691 SMC_GET_MAC_CSR(i, reg);
1692 spin_unlock_irqrestore(&lp->lock, flags);
1693 data[j++] = reg;
1694 }
1695 for(i=0;i<=31;i++) {
1696 spin_lock_irqsave(&lp->lock, flags);
1697 SMC_GET_MII(i, lp->mii.phy_id, reg);
1698 spin_unlock_irqrestore(&lp->lock, flags);
1699 data[j++] = reg & 0xFFFF;
1700 }
1701 }
1702
1703 static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1704 {
1705 unsigned long ioaddr = dev->base_addr;
1706 unsigned int timeout;
1707 int e2p_cmd;
1708
1709 e2p_cmd = SMC_GET_E2P_CMD();
1710 for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1711 if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1712 PRINTK("%s: %s timeout waiting for EEPROM to respond\n",
1713 dev->name, __FUNCTION__);
1714 return -EFAULT;
1715 }
1716 mdelay(1);
1717 e2p_cmd = SMC_GET_E2P_CMD();
1718 }
1719 if (timeout == 0) {
1720 PRINTK("%s: %s timeout waiting for EEPROM CMD not busy\n",
1721 dev->name, __FUNCTION__);
1722 return -ETIMEDOUT;
1723 }
1724 return 0;
1725 }
1726
1727 static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1728 int cmd, int addr)
1729 {
1730 unsigned long ioaddr = dev->base_addr;
1731 int ret;
1732
1733 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1734 return ret;
1735 SMC_SET_E2P_CMD(E2P_CMD_EPC_BUSY_ |
1736 ((cmd) & (0x7<<28)) |
1737 ((addr) & 0xFF));
1738 return 0;
1739 }
1740
1741 static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1742 u8 *data)
1743 {
1744 unsigned long ioaddr = dev->base_addr;
1745 int ret;
1746
1747 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1748 return ret;
1749 *data = SMC_GET_E2P_DATA();
1750 return 0;
1751 }
1752
1753 static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1754 u8 data)
1755 {
1756 unsigned long ioaddr = dev->base_addr;
1757 int ret;
1758
1759 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1760 return ret;
1761 SMC_SET_E2P_DATA(data);
1762 return 0;
1763 }
1764
1765 static int smc911x_ethtool_geteeprom(struct net_device *dev,
1766 struct ethtool_eeprom *eeprom, u8 *data)
1767 {
1768 u8 eebuf[SMC911X_EEPROM_LEN];
1769 int i, ret;
1770
1771 for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1772 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1773 return ret;
1774 if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1775 return ret;
1776 }
1777 memcpy(data, eebuf+eeprom->offset, eeprom->len);
1778 return 0;
1779 }
1780
1781 static int smc911x_ethtool_seteeprom(struct net_device *dev,
1782 struct ethtool_eeprom *eeprom, u8 *data)
1783 {
1784 int i, ret;
1785
1786 /* Enable erase */
1787 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1788 return ret;
1789 for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1790 /* erase byte */
1791 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1792 return ret;
1793 /* write byte */
1794 if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1795 return ret;
1796 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1797 return ret;
1798 }
1799 return 0;
1800 }
1801
1802 static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1803 {
1804 return SMC911X_EEPROM_LEN;
1805 }
1806
1807 static const struct ethtool_ops smc911x_ethtool_ops = {
1808 .get_settings = smc911x_ethtool_getsettings,
1809 .set_settings = smc911x_ethtool_setsettings,
1810 .get_drvinfo = smc911x_ethtool_getdrvinfo,
1811 .get_msglevel = smc911x_ethtool_getmsglevel,
1812 .set_msglevel = smc911x_ethtool_setmsglevel,
1813 .nway_reset = smc911x_ethtool_nwayreset,
1814 .get_link = ethtool_op_get_link,
1815 .get_regs_len = smc911x_ethtool_getregslen,
1816 .get_regs = smc911x_ethtool_getregs,
1817 .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1818 .get_eeprom = smc911x_ethtool_geteeprom,
1819 .set_eeprom = smc911x_ethtool_seteeprom,
1820 };
1821
1822 /*
1823 * smc911x_findirq
1824 *
1825 * This routine has a simple purpose -- make the SMC chip generate an
1826 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1827 */
1828 static int __init smc911x_findirq(unsigned long ioaddr)
1829 {
1830 int timeout = 20;
1831 unsigned long cookie;
1832
1833 DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
1834
1835 cookie = probe_irq_on();
1836
1837 /*
1838 * Force a SW interrupt
1839 */
1840
1841 SMC_SET_INT_EN(INT_EN_SW_INT_EN_);
1842
1843 /*
1844 * Wait until positive that the interrupt has been generated
1845 */
1846 do {
1847 int int_status;
1848 udelay(10);
1849 int_status = SMC_GET_INT_EN();
1850 if (int_status & INT_EN_SW_INT_EN_)
1851 break; /* got the interrupt */
1852 } while (--timeout);
1853
1854 /*
1855 * there is really nothing that I can do here if timeout fails,
1856 * as autoirq_report will return a 0 anyway, which is what I
1857 * want in this case. Plus, the clean up is needed in both
1858 * cases.
1859 */
1860
1861 /* and disable all interrupts again */
1862 SMC_SET_INT_EN(0);
1863
1864 /* and return what I found */
1865 return probe_irq_off(cookie);
1866 }
1867
1868 /*
1869 * Function: smc911x_probe(unsigned long ioaddr)
1870 *
1871 * Purpose:
1872 * Tests to see if a given ioaddr points to an SMC911x chip.
1873 * Returns a 0 on success
1874 *
1875 * Algorithm:
1876 * (1) see if the endian word is OK
1877 * (1) see if I recognize the chip ID in the appropriate register
1878 *
1879 * Here I do typical initialization tasks.
1880 *
1881 * o Initialize the structure if needed
1882 * o print out my vanity message if not done so already
1883 * o print out what type of hardware is detected
1884 * o print out the ethernet address
1885 * o find the IRQ
1886 * o set up my private data
1887 * o configure the dev structure with my subroutines
1888 * o actually GRAB the irq.
1889 * o GRAB the region
1890 */
1891 static int __init smc911x_probe(struct net_device *dev, unsigned long ioaddr)
1892 {
1893 struct smc911x_local *lp = netdev_priv(dev);
1894 int i, retval;
1895 unsigned int val, chip_id, revision;
1896 const char *version_string;
1897
1898 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1899
1900 /* First, see if the endian word is recognized */
1901 val = SMC_GET_BYTE_TEST();
1902 DBG(SMC_DEBUG_MISC, "%s: endian probe returned 0x%04x\n", CARDNAME, val);
1903 if (val != 0x87654321) {
1904 printk(KERN_ERR "Invalid chip endian 0x08%x\n",val);
1905 retval = -ENODEV;
1906 goto err_out;
1907 }
1908
1909 /*
1910 * check if the revision register is something that I
1911 * recognize. These might need to be added to later,
1912 * as future revisions could be added.
1913 */
1914 chip_id = SMC_GET_PN();
1915 DBG(SMC_DEBUG_MISC, "%s: id probe returned 0x%04x\n", CARDNAME, chip_id);
1916 for(i=0;chip_ids[i].id != 0; i++) {
1917 if (chip_ids[i].id == chip_id) break;
1918 }
1919 if (!chip_ids[i].id) {
1920 printk(KERN_ERR "Unknown chip ID %04x\n", chip_id);
1921 retval = -ENODEV;
1922 goto err_out;
1923 }
1924 version_string = chip_ids[i].name;
1925
1926 revision = SMC_GET_REV();
1927 DBG(SMC_DEBUG_MISC, "%s: revision = 0x%04x\n", CARDNAME, revision);
1928
1929 /* At this point I'll assume that the chip is an SMC911x. */
1930 DBG(SMC_DEBUG_MISC, "%s: Found a %s\n", CARDNAME, chip_ids[i].name);
1931
1932 /* Validate the TX FIFO size requested */
1933 if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1934 printk(KERN_ERR "Invalid TX FIFO size requested %d\n", tx_fifo_kb);
1935 retval = -EINVAL;
1936 goto err_out;
1937 }
1938
1939 /* fill in some of the fields */
1940 dev->base_addr = ioaddr;
1941 lp->version = chip_ids[i].id;
1942 lp->revision = revision;
1943 lp->tx_fifo_kb = tx_fifo_kb;
1944 /* Reverse calculate the RX FIFO size from the TX */
1945 lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1946 lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1947
1948 /* Set the automatic flow control values */
1949 switch(lp->tx_fifo_kb) {
1950 /*
1951 * AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1952 * AFC_LO is AFC_HI/2
1953 * BACK_DUR is about 5uS*(AFC_LO) rounded down
1954 */
1955 case 2:/* 13440 Rx Data Fifo Size */
1956 lp->afc_cfg=0x008C46AF;break;
1957 case 3:/* 12480 Rx Data Fifo Size */
1958 lp->afc_cfg=0x0082419F;break;
1959 case 4:/* 11520 Rx Data Fifo Size */
1960 lp->afc_cfg=0x00783C9F;break;
1961 case 5:/* 10560 Rx Data Fifo Size */
1962 lp->afc_cfg=0x006E374F;break;
1963 case 6:/* 9600 Rx Data Fifo Size */
1964 lp->afc_cfg=0x0064328F;break;
1965 case 7:/* 8640 Rx Data Fifo Size */
1966 lp->afc_cfg=0x005A2D7F;break;
1967 case 8:/* 7680 Rx Data Fifo Size */
1968 lp->afc_cfg=0x0050287F;break;
1969 case 9:/* 6720 Rx Data Fifo Size */
1970 lp->afc_cfg=0x0046236F;break;
1971 case 10:/* 5760 Rx Data Fifo Size */
1972 lp->afc_cfg=0x003C1E6F;break;
1973 case 11:/* 4800 Rx Data Fifo Size */
1974 lp->afc_cfg=0x0032195F;break;
1975 /*
1976 * AFC_HI is ~1520 bytes less than RX Data Fifo Size
1977 * AFC_LO is AFC_HI/2
1978 * BACK_DUR is about 5uS*(AFC_LO) rounded down
1979 */
1980 case 12:/* 3840 Rx Data Fifo Size */
1981 lp->afc_cfg=0x0024124F;break;
1982 case 13:/* 2880 Rx Data Fifo Size */
1983 lp->afc_cfg=0x0015073F;break;
1984 case 14:/* 1920 Rx Data Fifo Size */
1985 lp->afc_cfg=0x0006032F;break;
1986 default:
1987 PRINTK("%s: ERROR -- no AFC_CFG setting found",
1988 dev->name);
1989 break;
1990 }
1991
1992 DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX,
1993 "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1994 lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1995
1996 spin_lock_init(&lp->lock);
1997
1998 /* Get the MAC address */
1999 SMC_GET_MAC_ADDR(dev->dev_addr);
2000
2001 /* now, reset the chip, and put it into a known state */
2002 smc911x_reset(dev);
2003
2004 /*
2005 * If dev->irq is 0, then the device has to be banged on to see
2006 * what the IRQ is.
2007 *
2008 * Specifying an IRQ is done with the assumption that the user knows
2009 * what (s)he is doing. No checking is done!!!!
2010 */
2011 if (dev->irq < 1) {
2012 int trials;
2013
2014 trials = 3;
2015 while (trials--) {
2016 dev->irq = smc911x_findirq(ioaddr);
2017 if (dev->irq)
2018 break;
2019 /* kick the card and try again */
2020 smc911x_reset(dev);
2021 }
2022 }
2023 if (dev->irq == 0) {
2024 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
2025 dev->name);
2026 retval = -ENODEV;
2027 goto err_out;
2028 }
2029 dev->irq = irq_canonicalize(dev->irq);
2030
2031 /* Fill in the fields of the device structure with ethernet values. */
2032 ether_setup(dev);
2033
2034 dev->open = smc911x_open;
2035 dev->stop = smc911x_close;
2036 dev->hard_start_xmit = smc911x_hard_start_xmit;
2037 dev->tx_timeout = smc911x_timeout;
2038 dev->watchdog_timeo = msecs_to_jiffies(watchdog);
2039 dev->set_multicast_list = smc911x_set_multicast_list;
2040 dev->ethtool_ops = &smc911x_ethtool_ops;
2041 #ifdef CONFIG_NET_POLL_CONTROLLER
2042 dev->poll_controller = smc911x_poll_controller;
2043 #endif
2044
2045 INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
2046 lp->mii.phy_id_mask = 0x1f;
2047 lp->mii.reg_num_mask = 0x1f;
2048 lp->mii.force_media = 0;
2049 lp->mii.full_duplex = 0;
2050 lp->mii.dev = dev;
2051 lp->mii.mdio_read = smc911x_phy_read;
2052 lp->mii.mdio_write = smc911x_phy_write;
2053
2054 /*
2055 * Locate the phy, if any.
2056 */
2057 smc911x_phy_detect(dev);
2058
2059 /* Set default parameters */
2060 lp->msg_enable = NETIF_MSG_LINK;
2061 lp->ctl_rfduplx = 1;
2062 lp->ctl_rspeed = 100;
2063
2064 /* Grab the IRQ */
2065 retval = request_irq(dev->irq, &smc911x_interrupt,
2066 IRQF_SHARED | SMC_IRQ_SENSE, dev->name, dev);
2067 if (retval)
2068 goto err_out;
2069
2070 #ifdef SMC_USE_DMA
2071 lp->rxdma = SMC_DMA_REQUEST(dev, smc911x_rx_dma_irq);
2072 lp->txdma = SMC_DMA_REQUEST(dev, smc911x_tx_dma_irq);
2073 lp->rxdma_active = 0;
2074 lp->txdma_active = 0;
2075 dev->dma = lp->rxdma;
2076 #endif
2077
2078 retval = register_netdev(dev);
2079 if (retval == 0) {
2080 /* now, print out the card info, in a short format.. */
2081 printk("%s: %s (rev %d) at %#lx IRQ %d",
2082 dev->name, version_string, lp->revision,
2083 dev->base_addr, dev->irq);
2084
2085 #ifdef SMC_USE_DMA
2086 if (lp->rxdma != -1)
2087 printk(" RXDMA %d ", lp->rxdma);
2088
2089 if (lp->txdma != -1)
2090 printk("TXDMA %d", lp->txdma);
2091 #endif
2092 printk("\n");
2093 if (!is_valid_ether_addr(dev->dev_addr)) {
2094 printk("%s: Invalid ethernet MAC address. Please "
2095 "set using ifconfig\n", dev->name);
2096 } else {
2097 /* Print the Ethernet address */
2098 printk("%s: Ethernet addr: ", dev->name);
2099 for (i = 0; i < 5; i++)
2100 printk("%2.2x:", dev->dev_addr[i]);
2101 printk("%2.2x\n", dev->dev_addr[5]);
2102 }
2103
2104 if (lp->phy_type == 0) {
2105 PRINTK("%s: No PHY found\n", dev->name);
2106 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2107 PRINTK("%s: LAN911x Internal PHY\n", dev->name);
2108 } else {
2109 PRINTK("%s: External PHY 0x%08x\n", dev->name, lp->phy_type);
2110 }
2111 }
2112
2113 err_out:
2114 #ifdef SMC_USE_DMA
2115 if (retval) {
2116 if (lp->rxdma != -1) {
2117 SMC_DMA_FREE(dev, lp->rxdma);
2118 }
2119 if (lp->txdma != -1) {
2120 SMC_DMA_FREE(dev, lp->txdma);
2121 }
2122 }
2123 #endif
2124 return retval;
2125 }
2126
2127 /*
2128 * smc911x_init(void)
2129 *
2130 * Output:
2131 * 0 --> there is a device
2132 * anything else, error
2133 */
2134 static int smc911x_drv_probe(struct platform_device *pdev)
2135 {
2136 struct net_device *ndev;
2137 struct resource *res;
2138 struct smc911x_local *lp;
2139 unsigned int *addr;
2140 int ret;
2141
2142 DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2143 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2144 if (!res) {
2145 ret = -ENODEV;
2146 goto out;
2147 }
2148
2149 /*
2150 * Request the regions.
2151 */
2152 if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2153 ret = -EBUSY;
2154 goto out;
2155 }
2156
2157 ndev = alloc_etherdev(sizeof(struct smc911x_local));
2158 if (!ndev) {
2159 printk("%s: could not allocate device.\n", CARDNAME);
2160 ret = -ENOMEM;
2161 goto release_1;
2162 }
2163 SET_NETDEV_DEV(ndev, &pdev->dev);
2164
2165 ndev->dma = (unsigned char)-1;
2166 ndev->irq = platform_get_irq(pdev, 0);
2167 lp = netdev_priv(ndev);
2168 lp->netdev = ndev;
2169
2170 addr = ioremap(res->start, SMC911X_IO_EXTENT);
2171 if (!addr) {
2172 ret = -ENOMEM;
2173 goto release_both;
2174 }
2175
2176 platform_set_drvdata(pdev, ndev);
2177 ret = smc911x_probe(ndev, (unsigned long)addr);
2178 if (ret != 0) {
2179 platform_set_drvdata(pdev, NULL);
2180 iounmap(addr);
2181 release_both:
2182 free_netdev(ndev);
2183 release_1:
2184 release_mem_region(res->start, SMC911X_IO_EXTENT);
2185 out:
2186 printk("%s: not found (%d).\n", CARDNAME, ret);
2187 }
2188 #ifdef SMC_USE_DMA
2189 else {
2190 lp->physaddr = res->start;
2191 lp->dev = &pdev->dev;
2192 }
2193 #endif
2194
2195 return ret;
2196 }
2197
2198 static int smc911x_drv_remove(struct platform_device *pdev)
2199 {
2200 struct net_device *ndev = platform_get_drvdata(pdev);
2201 struct resource *res;
2202
2203 DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2204 platform_set_drvdata(pdev, NULL);
2205
2206 unregister_netdev(ndev);
2207
2208 free_irq(ndev->irq, ndev);
2209
2210 #ifdef SMC_USE_DMA
2211 {
2212 struct smc911x_local *lp = netdev_priv(ndev);
2213 if (lp->rxdma != -1) {
2214 SMC_DMA_FREE(dev, lp->rxdma);
2215 }
2216 if (lp->txdma != -1) {
2217 SMC_DMA_FREE(dev, lp->txdma);
2218 }
2219 }
2220 #endif
2221 iounmap((void *)ndev->base_addr);
2222 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2223 release_mem_region(res->start, SMC911X_IO_EXTENT);
2224
2225 free_netdev(ndev);
2226 return 0;
2227 }
2228
2229 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2230 {
2231 struct net_device *ndev = platform_get_drvdata(dev);
2232 unsigned long ioaddr = ndev->base_addr;
2233
2234 DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2235 if (ndev) {
2236 if (netif_running(ndev)) {
2237 netif_device_detach(ndev);
2238 smc911x_shutdown(ndev);
2239 #if POWER_DOWN
2240 /* Set D2 - Energy detect only setting */
2241 SMC_SET_PMT_CTRL(2<<12);
2242 #endif
2243 }
2244 }
2245 return 0;
2246 }
2247
2248 static int smc911x_drv_resume(struct platform_device *dev)
2249 {
2250 struct net_device *ndev = platform_get_drvdata(dev);
2251
2252 DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2253 if (ndev) {
2254 struct smc911x_local *lp = netdev_priv(ndev);
2255
2256 if (netif_running(ndev)) {
2257 smc911x_reset(ndev);
2258 smc911x_enable(ndev);
2259 if (lp->phy_type != 0)
2260 smc911x_phy_configure(&lp->phy_configure);
2261 netif_device_attach(ndev);
2262 }
2263 }
2264 return 0;
2265 }
2266
2267 static struct platform_driver smc911x_driver = {
2268 .probe = smc911x_drv_probe,
2269 .remove = smc911x_drv_remove,
2270 .suspend = smc911x_drv_suspend,
2271 .resume = smc911x_drv_resume,
2272 .driver = {
2273 .name = CARDNAME,
2274 },
2275 };
2276
2277 static int __init smc911x_init(void)
2278 {
2279 return platform_driver_register(&smc911x_driver);
2280 }
2281
2282 static void __exit smc911x_cleanup(void)
2283 {
2284 platform_driver_unregister(&smc911x_driver);
2285 }
2286
2287 module_init(smc911x_init);
2288 module_exit(smc911x_cleanup);
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