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hugetlb: factor out prep_new_huge_page
[linux-2.6/mini2440.git] / drivers / net / smc911x.c
blobc5871624f972cd3c662e1ba81d22a6f61aabb003
1 /*
2 * smc911x.c
3 * This is a driver for SMSC's LAN911{5,6,7,8} single-chip Ethernet devices.
4 *
5 * Copyright (C) 2005 Sensoria Corp
6 * Derived from the unified SMC91x driver by Nicolas Pitre
7 * and the smsc911x.c reference driver by SMSC
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * Arguments:
24 * watchdog = TX watchdog timeout
25 * tx_fifo_kb = Size of TX FIFO in KB
26 *
27 * History:
28 * 04/16/05 Dustin McIntire Initial version
29 */
30 static const char version[] =
31 "smc911x.c: v1.0 04-16-2005 by Dustin McIntire <dustin@sensoria.com>\n";
32
33 /* Debugging options */
34 #define ENABLE_SMC_DEBUG_RX 0
35 #define ENABLE_SMC_DEBUG_TX 0
36 #define ENABLE_SMC_DEBUG_DMA 0
37 #define ENABLE_SMC_DEBUG_PKTS 0
38 #define ENABLE_SMC_DEBUG_MISC 0
39 #define ENABLE_SMC_DEBUG_FUNC 0
40
41 #define SMC_DEBUG_RX ((ENABLE_SMC_DEBUG_RX ? 1 : 0) << 0)
42 #define SMC_DEBUG_TX ((ENABLE_SMC_DEBUG_TX ? 1 : 0) << 1)
43 #define SMC_DEBUG_DMA ((ENABLE_SMC_DEBUG_DMA ? 1 : 0) << 2)
44 #define SMC_DEBUG_PKTS ((ENABLE_SMC_DEBUG_PKTS ? 1 : 0) << 3)
45 #define SMC_DEBUG_MISC ((ENABLE_SMC_DEBUG_MISC ? 1 : 0) << 4)
46 #define SMC_DEBUG_FUNC ((ENABLE_SMC_DEBUG_FUNC ? 1 : 0) << 5)
47
48 #ifndef SMC_DEBUG
49 #define SMC_DEBUG ( SMC_DEBUG_RX | \
50 SMC_DEBUG_TX | \
51 SMC_DEBUG_DMA | \
52 SMC_DEBUG_PKTS | \
53 SMC_DEBUG_MISC | \
54 SMC_DEBUG_FUNC \
55 )
56 #endif
57
58 #include <linux/init.h>
59 #include <linux/module.h>
60 #include <linux/kernel.h>
61 #include <linux/sched.h>
62 #include <linux/slab.h>
63 #include <linux/delay.h>
64 #include <linux/interrupt.h>
65 #include <linux/errno.h>
66 #include <linux/ioport.h>
67 #include <linux/crc32.h>
68 #include <linux/device.h>
69 #include <linux/platform_device.h>
70 #include <linux/spinlock.h>
71 #include <linux/ethtool.h>
72 #include <linux/mii.h>
73 #include <linux/workqueue.h>
74
75 #include <linux/netdevice.h>
76 #include <linux/etherdevice.h>
77 #include <linux/skbuff.h>
78
79 #include <asm/io.h>
80
81 #include "smc911x.h"
82
83 /*
84 * Transmit timeout, default 5 seconds.
85 */
86 static int watchdog = 5000;
87 module_param(watchdog, int, 0400);
88 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
89
90 static int tx_fifo_kb=8;
91 module_param(tx_fifo_kb, int, 0400);
92 MODULE_PARM_DESC(tx_fifo_kb,"transmit FIFO size in KB (1<x<15)(default=8)");
93
94 MODULE_LICENSE("GPL");
95 MODULE_ALIAS("platform:smc911x");
96
97 /*
98 * The internal workings of the driver. If you are changing anything
99 * here with the SMC stuff, you should have the datasheet and know
100 * what you are doing.
101 */
102 #define CARDNAME "smc911x"
103
104 /*
105 * Use power-down feature of the chip
106 */
107 #define POWER_DOWN 1
108
109 #if SMC_DEBUG > 0
110 #define DBG(n, args...) \
111 do { \
112 if (SMC_DEBUG & (n)) \
113 printk(args); \
114 } while (0)
115
116 #define PRINTK(args...) printk(args)
117 #else
118 #define DBG(n, args...) do { } while (0)
119 #define PRINTK(args...) printk(KERN_DEBUG 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 for (cur = 0; cur < 8; cur++) {
135 u_char a, b;
136 a = *buf++;
137 b = *buf++;
138 printk("%02x%02x ", a, b);
139 }
140 printk("\n");
141 }
142 for (i = 0; i < remainder/2 ; i++) {
143 u_char a, b;
144 a = *buf++;
145 b = *buf++;
146 printk("%02x%02x ", a, b);
147 }
148 printk("\n");
149 }
150 #else
151 #define PRINT_PKT(x...) do { } while (0)
152 #endif
153
154
155 /* this enables an interrupt in the interrupt mask register */
156 #define SMC_ENABLE_INT(lp, x) do { \
157 unsigned int __mask; \
158 unsigned long __flags; \
159 spin_lock_irqsave(&lp->lock, __flags); \
160 __mask = SMC_GET_INT_EN((lp)); \
161 __mask |= (x); \
162 SMC_SET_INT_EN((lp), __mask); \
163 spin_unlock_irqrestore(&lp->lock, __flags); \
164 } while (0)
165
166 /* this disables an interrupt from the interrupt mask register */
167 #define SMC_DISABLE_INT(lp, x) do { \
168 unsigned int __mask; \
169 unsigned long __flags; \
170 spin_lock_irqsave(&lp->lock, __flags); \
171 __mask = SMC_GET_INT_EN((lp)); \
172 __mask &= ~(x); \
173 SMC_SET_INT_EN((lp), __mask); \
174 spin_unlock_irqrestore(&lp->lock, __flags); \
175 } while (0)
176
177 /*
178 * this does a soft reset on the device
179 */
180 static void smc911x_reset(struct net_device *dev)
181 {
182 struct smc911x_local *lp = netdev_priv(dev);
183 unsigned int reg, timeout=0, resets=1;
184 unsigned long flags;
185
186 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
187
188 /* Take out of PM setting first */
189 if ((SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_) == 0) {
190 /* Write to the bytetest will take out of powerdown */
191 SMC_SET_BYTE_TEST(lp, 0);
192 timeout=10;
193 do {
194 udelay(10);
195 reg = SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_;
196 } while (--timeout && !reg);
197 if (timeout == 0) {
198 PRINTK("%s: smc911x_reset timeout waiting for PM restore\n", dev->name);
199 return;
200 }
201 }
202
203 /* Disable all interrupts */
204 spin_lock_irqsave(&lp->lock, flags);
205 SMC_SET_INT_EN(lp, 0);
206 spin_unlock_irqrestore(&lp->lock, flags);
207
208 while (resets--) {
209 SMC_SET_HW_CFG(lp, HW_CFG_SRST_);
210 timeout=10;
211 do {
212 udelay(10);
213 reg = SMC_GET_HW_CFG(lp);
214 /* If chip indicates reset timeout then try again */
215 if (reg & HW_CFG_SRST_TO_) {
216 PRINTK("%s: chip reset timeout, retrying...\n", dev->name);
217 resets++;
218 break;
219 }
220 } while (--timeout && (reg & HW_CFG_SRST_));
221 }
222 if (timeout == 0) {
223 PRINTK("%s: smc911x_reset timeout waiting for reset\n", dev->name);
224 return;
225 }
226
227 /* make sure EEPROM has finished loading before setting GPIO_CFG */
228 timeout=1000;
229 while ( timeout-- && (SMC_GET_E2P_CMD(lp) & E2P_CMD_EPC_BUSY_)) {
230 udelay(10);
231 }
232 if (timeout == 0){
233 PRINTK("%s: smc911x_reset timeout waiting for EEPROM busy\n", dev->name);
234 return;
235 }
236
237 /* Initialize interrupts */
238 SMC_SET_INT_EN(lp, 0);
239 SMC_ACK_INT(lp, -1);
240
241 /* Reset the FIFO level and flow control settings */
242 SMC_SET_HW_CFG(lp, (lp->tx_fifo_kb & 0xF) << 16);
243 //TODO: Figure out what appropriate pause time is
244 SMC_SET_FLOW(lp, FLOW_FCPT_ | FLOW_FCEN_);
245 SMC_SET_AFC_CFG(lp, lp->afc_cfg);
246
247
248 /* Set to LED outputs */
249 SMC_SET_GPIO_CFG(lp, 0x70070000);
250
251 /*
252 * Deassert IRQ for 1*10us for edge type interrupts
253 * and drive IRQ pin push-pull
254 */
255 SMC_SET_IRQ_CFG(lp, (1 << 24) | INT_CFG_IRQ_EN_ | INT_CFG_IRQ_TYPE_);
256
257 /* clear anything saved */
258 if (lp->pending_tx_skb != NULL) {
259 dev_kfree_skb (lp->pending_tx_skb);
260 lp->pending_tx_skb = NULL;
261 dev->stats.tx_errors++;
262 dev->stats.tx_aborted_errors++;
263 }
264 }
265
266 /*
267 * Enable Interrupts, Receive, and Transmit
268 */
269 static void smc911x_enable(struct net_device *dev)
270 {
271 struct smc911x_local *lp = netdev_priv(dev);
272 unsigned mask, cfg, cr;
273 unsigned long flags;
274
275 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
276
277 SMC_SET_MAC_ADDR(lp, dev->dev_addr);
278
279 /* Enable TX */
280 cfg = SMC_GET_HW_CFG(lp);
281 cfg &= HW_CFG_TX_FIF_SZ_ | 0xFFF;
282 cfg |= HW_CFG_SF_;
283 SMC_SET_HW_CFG(lp, cfg);
284 SMC_SET_FIFO_TDA(lp, 0xFF);
285 /* Update TX stats on every 64 packets received or every 1 sec */
286 SMC_SET_FIFO_TSL(lp, 64);
287 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
288
289 spin_lock_irqsave(&lp->lock, flags);
290 SMC_GET_MAC_CR(lp, cr);
291 cr |= MAC_CR_TXEN_ | MAC_CR_HBDIS_;
292 SMC_SET_MAC_CR(lp, cr);
293 SMC_SET_TX_CFG(lp, TX_CFG_TX_ON_);
294 spin_unlock_irqrestore(&lp->lock, flags);
295
296 /* Add 2 byte padding to start of packets */
297 SMC_SET_RX_CFG(lp, (2<<8) & RX_CFG_RXDOFF_);
298
299 /* Turn on receiver and enable RX */
300 if (cr & MAC_CR_RXEN_)
301 DBG(SMC_DEBUG_RX, "%s: Receiver already enabled\n", dev->name);
302
303 spin_lock_irqsave(&lp->lock, flags);
304 SMC_SET_MAC_CR(lp, cr | MAC_CR_RXEN_);
305 spin_unlock_irqrestore(&lp->lock, flags);
306
307 /* Interrupt on every received packet */
308 SMC_SET_FIFO_RSA(lp, 0x01);
309 SMC_SET_FIFO_RSL(lp, 0x00);
310
311 /* now, enable interrupts */
312 mask = INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_ | INT_EN_RSFL_EN_ |
313 INT_EN_GPT_INT_EN_ | INT_EN_RXDFH_INT_EN_ | INT_EN_RXE_EN_ |
314 INT_EN_PHY_INT_EN_;
315 if (IS_REV_A(lp->revision))
316 mask|=INT_EN_RDFL_EN_;
317 else {
318 mask|=INT_EN_RDFO_EN_;
319 }
320 SMC_ENABLE_INT(lp, mask);
321 }
322
323 /*
324 * this puts the device in an inactive state
325 */
326 static void smc911x_shutdown(struct net_device *dev)
327 {
328 struct smc911x_local *lp = netdev_priv(dev);
329 unsigned cr;
330 unsigned long flags;
331
332 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", CARDNAME, __FUNCTION__);
333
334 /* Disable IRQ's */
335 SMC_SET_INT_EN(lp, 0);
336
337 /* Turn of Rx and TX */
338 spin_lock_irqsave(&lp->lock, flags);
339 SMC_GET_MAC_CR(lp, cr);
340 cr &= ~(MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
341 SMC_SET_MAC_CR(lp, cr);
342 SMC_SET_TX_CFG(lp, TX_CFG_STOP_TX_);
343 spin_unlock_irqrestore(&lp->lock, flags);
344 }
345
346 static inline void smc911x_drop_pkt(struct net_device *dev)
347 {
348 struct smc911x_local *lp = netdev_priv(dev);
349 unsigned int fifo_count, timeout, reg;
350
351 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, "%s: --> %s\n", CARDNAME, __FUNCTION__);
352 fifo_count = SMC_GET_RX_FIFO_INF(lp) & 0xFFFF;
353 if (fifo_count <= 4) {
354 /* Manually dump the packet data */
355 while (fifo_count--)
356 SMC_GET_RX_FIFO(lp);
357 } else {
358 /* Fast forward through the bad packet */
359 SMC_SET_RX_DP_CTRL(lp, RX_DP_CTRL_FFWD_BUSY_);
360 timeout=50;
361 do {
362 udelay(10);
363 reg = SMC_GET_RX_DP_CTRL(lp) & RX_DP_CTRL_FFWD_BUSY_;
364 } while (--timeout && reg);
365 if (timeout == 0) {
366 PRINTK("%s: timeout waiting for RX fast forward\n", dev->name);
367 }
368 }
369 }
370
371 /*
372 * This is the procedure to handle the receipt of a packet.
373 * It should be called after checking for packet presence in
374 * the RX status FIFO. It must be called with the spin lock
375 * already held.
376 */
377 static inline void smc911x_rcv(struct net_device *dev)
378 {
379 struct smc911x_local *lp = netdev_priv(dev);
380 unsigned int pkt_len, status;
381 struct sk_buff *skb;
382 unsigned char *data;
383
384 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, "%s: --> %s\n",
385 dev->name, __FUNCTION__);
386 status = SMC_GET_RX_STS_FIFO(lp);
387 DBG(SMC_DEBUG_RX, "%s: Rx pkt len %d status 0x%08x \n",
388 dev->name, (status & 0x3fff0000) >> 16, status & 0xc000ffff);
389 pkt_len = (status & RX_STS_PKT_LEN_) >> 16;
390 if (status & RX_STS_ES_) {
391 /* Deal with a bad packet */
392 dev->stats.rx_errors++;
393 if (status & RX_STS_CRC_ERR_)
394 dev->stats.rx_crc_errors++;
395 else {
396 if (status & RX_STS_LEN_ERR_)
397 dev->stats.rx_length_errors++;
398 if (status & RX_STS_MCAST_)
399 dev->stats.multicast++;
400 }
401 /* Remove the bad packet data from the RX FIFO */
402 smc911x_drop_pkt(dev);
403 } else {
404 /* Receive a valid packet */
405 /* Alloc a buffer with extra room for DMA alignment */
406 skb=dev_alloc_skb(pkt_len+32);
407 if (unlikely(skb == NULL)) {
408 PRINTK( "%s: Low memory, rcvd packet dropped.\n",
409 dev->name);
410 dev->stats.rx_dropped++;
411 smc911x_drop_pkt(dev);
412 return;
413 }
414 /* Align IP header to 32 bits
415 * Note that the device is configured to add a 2
416 * byte padding to the packet start, so we really
417 * want to write to the orignal data pointer */
418 data = skb->data;
419 skb_reserve(skb, 2);
420 skb_put(skb,pkt_len-4);
421 #ifdef SMC_USE_DMA
422 {
423 unsigned int fifo;
424 /* Lower the FIFO threshold if possible */
425 fifo = SMC_GET_FIFO_INT(lp);
426 if (fifo & 0xFF) fifo--;
427 DBG(SMC_DEBUG_RX, "%s: Setting RX stat FIFO threshold to %d\n",
428 dev->name, fifo & 0xff);
429 SMC_SET_FIFO_INT(lp, fifo);
430 /* Setup RX DMA */
431 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN16_ | ((2<<8) & RX_CFG_RXDOFF_));
432 lp->rxdma_active = 1;
433 lp->current_rx_skb = skb;
434 SMC_PULL_DATA(lp, data, (pkt_len+2+15) & ~15);
435 /* Packet processing deferred to DMA RX interrupt */
436 }
437 #else
438 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN4_ | ((2<<8) & RX_CFG_RXDOFF_));
439 SMC_PULL_DATA(lp, data, pkt_len+2+3);
440
441 DBG(SMC_DEBUG_PKTS, "%s: Received packet\n", dev->name);
442 PRINT_PKT(data, ((pkt_len - 4) <= 64) ? pkt_len - 4 : 64);
443 dev->last_rx = jiffies;
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 unsigned long flags;
462
463 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n", dev->name, __FUNCTION__);
464 BUG_ON(lp->pending_tx_skb == NULL);
465
466 skb = lp->pending_tx_skb;
467 lp->pending_tx_skb = NULL;
468
469 /* cmdA {25:24] data alignment [20:16] start offset [10:0] buffer length */
470 /* cmdB {31:16] pkt tag [10:0] length */
471 #ifdef SMC_USE_DMA
472 /* 16 byte buffer alignment mode */
473 buf = (char*)((u32)(skb->data) & ~0xF);
474 len = (skb->len + 0xF + ((u32)skb->data & 0xF)) & ~0xF;
475 cmdA = (1<<24) | (((u32)skb->data & 0xF)<<16) |
476 TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
477 skb->len;
478 #else
479 buf = (char*)((u32)skb->data & ~0x3);
480 len = (skb->len + 3 + ((u32)skb->data & 3)) & ~0x3;
481 cmdA = (((u32)skb->data & 0x3) << 16) |
482 TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
483 skb->len;
484 #endif
485 /* tag is packet length so we can use this in stats update later */
486 cmdB = (skb->len << 16) | (skb->len & 0x7FF);
487
488 DBG(SMC_DEBUG_TX, "%s: TX PKT LENGTH 0x%04x (%d) BUF 0x%p CMDA 0x%08x CMDB 0x%08x\n",
489 dev->name, len, len, buf, cmdA, cmdB);
490 SMC_SET_TX_FIFO(lp, cmdA);
491 SMC_SET_TX_FIFO(lp, cmdB);
492
493 DBG(SMC_DEBUG_PKTS, "%s: Transmitted packet\n", dev->name);
494 PRINT_PKT(buf, len <= 64 ? len : 64);
495
496 /* Send pkt via PIO or DMA */
497 #ifdef SMC_USE_DMA
498 lp->current_tx_skb = skb;
499 SMC_PUSH_DATA(lp, buf, len);
500 /* DMA complete IRQ will free buffer and set jiffies */
501 #else
502 SMC_PUSH_DATA(lp, buf, len);
503 dev->trans_start = jiffies;
504 dev_kfree_skb(skb);
505 #endif
506 spin_lock_irqsave(&lp->lock, flags);
507 if (!lp->tx_throttle) {
508 netif_wake_queue(dev);
509 }
510 spin_unlock_irqrestore(&lp->lock, flags);
511 SMC_ENABLE_INT(lp, INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_);
512 }
513
514 /*
515 * Since I am not sure if I will have enough room in the chip's ram
516 * to store the packet, I call this routine which either sends it
517 * now, or set the card to generates an interrupt when ready
518 * for the packet.
519 */
520 static int smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
521 {
522 struct smc911x_local *lp = netdev_priv(dev);
523 unsigned int free;
524 unsigned long flags;
525
526 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n",
527 dev->name, __FUNCTION__);
528
529 BUG_ON(lp->pending_tx_skb != NULL);
530
531 free = SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TDFREE_;
532 DBG(SMC_DEBUG_TX, "%s: TX free space %d\n", dev->name, free);
533
534 /* Turn off the flow when running out of space in FIFO */
535 if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
536 DBG(SMC_DEBUG_TX, "%s: Disabling data flow due to low FIFO space (%d)\n",
537 dev->name, free);
538 spin_lock_irqsave(&lp->lock, flags);
539 /* Reenable when at least 1 packet of size MTU present */
540 SMC_SET_FIFO_TDA(lp, (SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
541 lp->tx_throttle = 1;
542 netif_stop_queue(dev);
543 spin_unlock_irqrestore(&lp->lock, flags);
544 }
545
546 /* Drop packets when we run out of space in TX FIFO
547 * Account for overhead required for:
548 *
549 * Tx command words 8 bytes
550 * Start offset 15 bytes
551 * End padding 15 bytes
552 */
553 if (unlikely(free < (skb->len + 8 + 15 + 15))) {
554 printk("%s: No Tx free space %d < %d\n",
555 dev->name, free, skb->len);
556 lp->pending_tx_skb = NULL;
557 dev->stats.tx_errors++;
558 dev->stats.tx_dropped++;
559 dev_kfree_skb(skb);
560 return 0;
561 }
562
563 #ifdef SMC_USE_DMA
564 {
565 /* If the DMA is already running then defer this packet Tx until
566 * the DMA IRQ starts it
567 */
568 spin_lock_irqsave(&lp->lock, flags);
569 if (lp->txdma_active) {
570 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: Tx DMA running, deferring packet\n", dev->name);
571 lp->pending_tx_skb = skb;
572 netif_stop_queue(dev);
573 spin_unlock_irqrestore(&lp->lock, flags);
574 return 0;
575 } else {
576 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: Activating Tx DMA\n", dev->name);
577 lp->txdma_active = 1;
578 }
579 spin_unlock_irqrestore(&lp->lock, flags);
580 }
581 #endif
582 lp->pending_tx_skb = skb;
583 smc911x_hardware_send_pkt(dev);
584
585 return 0;
586 }
587
588 /*
589 * This handles a TX status interrupt, which is only called when:
590 * - a TX error occurred, or
591 * - TX of a packet completed.
592 */
593 static void smc911x_tx(struct net_device *dev)
594 {
595 struct smc911x_local *lp = netdev_priv(dev);
596 unsigned int tx_status;
597
598 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n",
599 dev->name, __FUNCTION__);
600
601 /* Collect the TX status */
602 while (((SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
603 DBG(SMC_DEBUG_TX, "%s: Tx stat FIFO used 0x%04x\n",
604 dev->name,
605 (SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16);
606 tx_status = SMC_GET_TX_STS_FIFO(lp);
607 dev->stats.tx_packets++;
608 dev->stats.tx_bytes+=tx_status>>16;
609 DBG(SMC_DEBUG_TX, "%s: Tx FIFO tag 0x%04x status 0x%04x\n",
610 dev->name, (tx_status & 0xffff0000) >> 16,
611 tx_status & 0x0000ffff);
612 /* count Tx errors, but ignore lost carrier errors when in
613 * full-duplex mode */
614 if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
615 !(tx_status & 0x00000306))) {
616 dev->stats.tx_errors++;
617 }
618 if (tx_status & TX_STS_MANY_COLL_) {
619 dev->stats.collisions+=16;
620 dev->stats.tx_aborted_errors++;
621 } else {
622 dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
623 }
624 /* carrier error only has meaning for half-duplex communication */
625 if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
626 !lp->ctl_rfduplx) {
627 dev->stats.tx_carrier_errors++;
628 }
629 if (tx_status & TX_STS_LATE_COLL_) {
630 dev->stats.collisions++;
631 dev->stats.tx_aborted_errors++;
632 }
633 }
634 }
635
636
637 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
638 /*
639 * Reads a register from the MII Management serial interface
640 */
641
642 static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
643 {
644 struct smc911x_local *lp = netdev_priv(dev);
645 unsigned int phydata;
646
647 SMC_GET_MII(lp, phyreg, phyaddr, phydata);
648
649 DBG(SMC_DEBUG_MISC, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
650 __FUNCTION__, phyaddr, phyreg, phydata);
651 return phydata;
652 }
653
654
655 /*
656 * Writes a register to the MII Management serial interface
657 */
658 static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
659 int phydata)
660 {
661 struct smc911x_local *lp = netdev_priv(dev);
662
663 DBG(SMC_DEBUG_MISC, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
664 __FUNCTION__, phyaddr, phyreg, phydata);
665
666 SMC_SET_MII(lp, phyreg, phyaddr, phydata);
667 }
668
669 /*
670 * Finds and reports the PHY address (115 and 117 have external
671 * PHY interface 118 has internal only
672 */
673 static void smc911x_phy_detect(struct net_device *dev)
674 {
675 struct smc911x_local *lp = netdev_priv(dev);
676 int phyaddr;
677 unsigned int cfg, id1, id2;
678
679 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
680
681 lp->phy_type = 0;
682
683 /*
684 * Scan all 32 PHY addresses if necessary, starting at
685 * PHY#1 to PHY#31, and then PHY#0 last.
686 */
687 switch(lp->version) {
688 case 0x115:
689 case 0x117:
690 cfg = SMC_GET_HW_CFG(lp);
691 if (cfg & HW_CFG_EXT_PHY_DET_) {
692 cfg &= ~HW_CFG_PHY_CLK_SEL_;
693 cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
694 SMC_SET_HW_CFG(lp, cfg);
695 udelay(10); /* Wait for clocks to stop */
696
697 cfg |= HW_CFG_EXT_PHY_EN_;
698 SMC_SET_HW_CFG(lp, cfg);
699 udelay(10); /* Wait for clocks to stop */
700
701 cfg &= ~HW_CFG_PHY_CLK_SEL_;
702 cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
703 SMC_SET_HW_CFG(lp, cfg);
704 udelay(10); /* Wait for clocks to stop */
705
706 cfg |= HW_CFG_SMI_SEL_;
707 SMC_SET_HW_CFG(lp, cfg);
708
709 for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
710
711 /* Read the PHY identifiers */
712 SMC_GET_PHY_ID1(lp, phyaddr & 31, id1);
713 SMC_GET_PHY_ID2(lp, phyaddr & 31, id2);
714
715 /* Make sure it is a valid identifier */
716 if (id1 != 0x0000 && id1 != 0xffff &&
717 id1 != 0x8000 && id2 != 0x0000 &&
718 id2 != 0xffff && id2 != 0x8000) {
719 /* Save the PHY's address */
720 lp->mii.phy_id = phyaddr & 31;
721 lp->phy_type = id1 << 16 | id2;
722 break;
723 }
724 }
725 }
726 default:
727 /* Internal media only */
728 SMC_GET_PHY_ID1(lp, 1, id1);
729 SMC_GET_PHY_ID2(lp, 1, id2);
730 /* Save the PHY's address */
731 lp->mii.phy_id = 1;
732 lp->phy_type = id1 << 16 | id2;
733 }
734
735 DBG(SMC_DEBUG_MISC, "%s: phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%d\n",
736 dev->name, id1, id2, lp->mii.phy_id);
737 }
738
739 /*
740 * Sets the PHY to a configuration as determined by the user.
741 * Called with spin_lock held.
742 */
743 static int smc911x_phy_fixed(struct net_device *dev)
744 {
745 struct smc911x_local *lp = netdev_priv(dev);
746 int phyaddr = lp->mii.phy_id;
747 int bmcr;
748
749 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
750
751 /* Enter Link Disable state */
752 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
753 bmcr |= BMCR_PDOWN;
754 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
755
756 /*
757 * Set our fixed capabilities
758 * Disable auto-negotiation
759 */
760 bmcr &= ~BMCR_ANENABLE;
761 if (lp->ctl_rfduplx)
762 bmcr |= BMCR_FULLDPLX;
763
764 if (lp->ctl_rspeed == 100)
765 bmcr |= BMCR_SPEED100;
766
767 /* Write our capabilities to the phy control register */
768 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
769
770 /* Re-Configure the Receive/Phy Control register */
771 bmcr &= ~BMCR_PDOWN;
772 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
773
774 return 1;
775 }
776
777 /*
778 * smc911x_phy_reset - reset the phy
779 * @dev: net device
780 * @phy: phy address
781 *
782 * Issue a software reset for the specified PHY and
783 * wait up to 100ms for the reset to complete. We should
784 * not access the PHY for 50ms after issuing the reset.
785 *
786 * The time to wait appears to be dependent on the PHY.
787 *
788 */
789 static int smc911x_phy_reset(struct net_device *dev, int phy)
790 {
791 struct smc911x_local *lp = netdev_priv(dev);
792 int timeout;
793 unsigned long flags;
794 unsigned int reg;
795
796 DBG(SMC_DEBUG_FUNC, "%s: --> %s()\n", dev->name, __FUNCTION__);
797
798 spin_lock_irqsave(&lp->lock, flags);
799 reg = SMC_GET_PMT_CTRL(lp);
800 reg &= ~0xfffff030;
801 reg |= PMT_CTRL_PHY_RST_;
802 SMC_SET_PMT_CTRL(lp, reg);
803 spin_unlock_irqrestore(&lp->lock, flags);
804 for (timeout = 2; timeout; timeout--) {
805 msleep(50);
806 spin_lock_irqsave(&lp->lock, flags);
807 reg = SMC_GET_PMT_CTRL(lp);
808 spin_unlock_irqrestore(&lp->lock, flags);
809 if (!(reg & PMT_CTRL_PHY_RST_)) {
810 /* extra delay required because the phy may
811 * not be completed with its reset
812 * when PHY_BCR_RESET_ is cleared. 256us
813 * should suffice, but use 500us to be safe
814 */
815 udelay(500);
816 break;
817 }
818 }
819
820 return reg & PMT_CTRL_PHY_RST_;
821 }
822
823 /*
824 * smc911x_phy_powerdown - powerdown phy
825 * @dev: net device
826 * @phy: phy address
827 *
828 * Power down the specified PHY
829 */
830 static void smc911x_phy_powerdown(struct net_device *dev, int phy)
831 {
832 struct smc911x_local *lp = netdev_priv(dev);
833 unsigned int bmcr;
834
835 /* Enter Link Disable state */
836 SMC_GET_PHY_BMCR(lp, phy, bmcr);
837 bmcr |= BMCR_PDOWN;
838 SMC_SET_PHY_BMCR(lp, phy, bmcr);
839 }
840
841 /*
842 * smc911x_phy_check_media - check the media status and adjust BMCR
843 * @dev: net device
844 * @init: set true for initialisation
845 *
846 * Select duplex mode depending on negotiation state. This
847 * also updates our carrier state.
848 */
849 static void smc911x_phy_check_media(struct net_device *dev, int init)
850 {
851 struct smc911x_local *lp = netdev_priv(dev);
852 int phyaddr = lp->mii.phy_id;
853 unsigned int bmcr, cr;
854
855 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
856
857 if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
858 /* duplex state has changed */
859 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
860 SMC_GET_MAC_CR(lp, cr);
861 if (lp->mii.full_duplex) {
862 DBG(SMC_DEBUG_MISC, "%s: Configuring for full-duplex mode\n", dev->name);
863 bmcr |= BMCR_FULLDPLX;
864 cr |= MAC_CR_RCVOWN_;
865 } else {
866 DBG(SMC_DEBUG_MISC, "%s: Configuring for half-duplex mode\n", dev->name);
867 bmcr &= ~BMCR_FULLDPLX;
868 cr &= ~MAC_CR_RCVOWN_;
869 }
870 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
871 SMC_SET_MAC_CR(lp, cr);
872 }
873 }
874
875 /*
876 * Configures the specified PHY through the MII management interface
877 * using Autonegotiation.
878 * Calls smc911x_phy_fixed() if the user has requested a certain config.
879 * If RPC ANEG bit is set, the media selection is dependent purely on
880 * the selection by the MII (either in the MII BMCR reg or the result
881 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
882 * is controlled by the RPC SPEED and RPC DPLX bits.
883 */
884 static void smc911x_phy_configure(struct work_struct *work)
885 {
886 struct smc911x_local *lp = container_of(work, struct smc911x_local,
887 phy_configure);
888 struct net_device *dev = lp->netdev;
889 int phyaddr = lp->mii.phy_id;
890 int my_phy_caps; /* My PHY capabilities */
891 int my_ad_caps; /* My Advertised capabilities */
892 int status;
893 unsigned long flags;
894
895 DBG(SMC_DEBUG_FUNC, "%s: --> %s()\n", dev->name, __FUNCTION__);
896
897 /*
898 * We should not be called if phy_type is zero.
899 */
900 if (lp->phy_type == 0)
901 return;
902
903 if (smc911x_phy_reset(dev, phyaddr)) {
904 printk("%s: PHY reset timed out\n", dev->name);
905 return;
906 }
907 spin_lock_irqsave(&lp->lock, flags);
908
909 /*
910 * Enable PHY Interrupts (for register 18)
911 * Interrupts listed here are enabled
912 */
913 SMC_SET_PHY_INT_MASK(lp, phyaddr, PHY_INT_MASK_ENERGY_ON_ |
914 PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
915 PHY_INT_MASK_LINK_DOWN_);
916
917 /* If the user requested no auto neg, then go set his request */
918 if (lp->mii.force_media) {
919 smc911x_phy_fixed(dev);
920 goto smc911x_phy_configure_exit;
921 }
922
923 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
924 SMC_GET_PHY_BMSR(lp, phyaddr, my_phy_caps);
925 if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
926 printk(KERN_INFO "Auto negotiation NOT supported\n");
927 smc911x_phy_fixed(dev);
928 goto smc911x_phy_configure_exit;
929 }
930
931 /* CSMA capable w/ both pauses */
932 my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
933
934 if (my_phy_caps & BMSR_100BASE4)
935 my_ad_caps |= ADVERTISE_100BASE4;
936 if (my_phy_caps & BMSR_100FULL)
937 my_ad_caps |= ADVERTISE_100FULL;
938 if (my_phy_caps & BMSR_100HALF)
939 my_ad_caps |= ADVERTISE_100HALF;
940 if (my_phy_caps & BMSR_10FULL)
941 my_ad_caps |= ADVERTISE_10FULL;
942 if (my_phy_caps & BMSR_10HALF)
943 my_ad_caps |= ADVERTISE_10HALF;
944
945 /* Disable capabilities not selected by our user */
946 if (lp->ctl_rspeed != 100)
947 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
948
949 if (!lp->ctl_rfduplx)
950 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
951
952 /* Update our Auto-Neg Advertisement Register */
953 SMC_SET_PHY_MII_ADV(lp, phyaddr, my_ad_caps);
954 lp->mii.advertising = my_ad_caps;
955
956 /*
957 * Read the register back. Without this, it appears that when
958 * auto-negotiation is restarted, sometimes it isn't ready and
959 * the link does not come up.
960 */
961 udelay(10);
962 SMC_GET_PHY_MII_ADV(lp, phyaddr, status);
963
964 DBG(SMC_DEBUG_MISC, "%s: phy caps=0x%04x\n", dev->name, my_phy_caps);
965 DBG(SMC_DEBUG_MISC, "%s: phy advertised caps=0x%04x\n", dev->name, my_ad_caps);
966
967 /* Restart auto-negotiation process in order to advertise my caps */
968 SMC_SET_PHY_BMCR(lp, phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
969
970 smc911x_phy_check_media(dev, 1);
971
972 smc911x_phy_configure_exit:
973 spin_unlock_irqrestore(&lp->lock, flags);
974 }
975
976 /*
977 * smc911x_phy_interrupt
978 *
979 * Purpose: Handle interrupts relating to PHY register 18. This is
980 * called from the "hard" interrupt handler under our private spinlock.
981 */
982 static void smc911x_phy_interrupt(struct net_device *dev)
983 {
984 struct smc911x_local *lp = netdev_priv(dev);
985 int phyaddr = lp->mii.phy_id;
986 int status;
987
988 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
989
990 if (lp->phy_type == 0)
991 return;
992
993 smc911x_phy_check_media(dev, 0);
994 /* read to clear status bits */
995 SMC_GET_PHY_INT_SRC(lp, phyaddr,status);
996 DBG(SMC_DEBUG_MISC, "%s: PHY interrupt status 0x%04x\n",
997 dev->name, status & 0xffff);
998 DBG(SMC_DEBUG_MISC, "%s: AFC_CFG 0x%08x\n",
999 dev->name, SMC_GET_AFC_CFG(lp));
1000 }
1001
1002 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1003
1004 /*
1005 * This is the main routine of the driver, to handle the device when
1006 * it needs some attention.
1007 */
1008 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1009 {
1010 struct net_device *dev = dev_id;
1011 struct smc911x_local *lp = netdev_priv(dev);
1012 unsigned int status, mask, timeout;
1013 unsigned int rx_overrun=0, cr, pkts;
1014 unsigned long flags;
1015
1016 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1017
1018 spin_lock_irqsave(&lp->lock, flags);
1019
1020 /* Spurious interrupt check */
1021 if ((SMC_GET_IRQ_CFG(lp) & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1022 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1023 spin_unlock_irqrestore(&lp->lock, flags);
1024 return IRQ_NONE;
1025 }
1026
1027 mask = SMC_GET_INT_EN(lp);
1028 SMC_SET_INT_EN(lp, 0);
1029
1030 /* set a timeout value, so I don't stay here forever */
1031 timeout = 8;
1032
1033
1034 do {
1035 status = SMC_GET_INT(lp);
1036
1037 DBG(SMC_DEBUG_MISC, "%s: INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1038 dev->name, status, mask, status & ~mask);
1039
1040 status &= mask;
1041 if (!status)
1042 break;
1043
1044 /* Handle SW interrupt condition */
1045 if (status & INT_STS_SW_INT_) {
1046 SMC_ACK_INT(lp, INT_STS_SW_INT_);
1047 mask &= ~INT_EN_SW_INT_EN_;
1048 }
1049 /* Handle various error conditions */
1050 if (status & INT_STS_RXE_) {
1051 SMC_ACK_INT(lp, INT_STS_RXE_);
1052 dev->stats.rx_errors++;
1053 }
1054 if (status & INT_STS_RXDFH_INT_) {
1055 SMC_ACK_INT(lp, INT_STS_RXDFH_INT_);
1056 dev->stats.rx_dropped+=SMC_GET_RX_DROP(lp);
1057 }
1058 /* Undocumented interrupt-what is the right thing to do here? */
1059 if (status & INT_STS_RXDF_INT_) {
1060 SMC_ACK_INT(lp, INT_STS_RXDF_INT_);
1061 }
1062
1063 /* Rx Data FIFO exceeds set level */
1064 if (status & INT_STS_RDFL_) {
1065 if (IS_REV_A(lp->revision)) {
1066 rx_overrun=1;
1067 SMC_GET_MAC_CR(lp, cr);
1068 cr &= ~MAC_CR_RXEN_;
1069 SMC_SET_MAC_CR(lp, cr);
1070 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1071 dev->stats.rx_errors++;
1072 dev->stats.rx_fifo_errors++;
1073 }
1074 SMC_ACK_INT(lp, INT_STS_RDFL_);
1075 }
1076 if (status & INT_STS_RDFO_) {
1077 if (!IS_REV_A(lp->revision)) {
1078 SMC_GET_MAC_CR(lp, cr);
1079 cr &= ~MAC_CR_RXEN_;
1080 SMC_SET_MAC_CR(lp, cr);
1081 rx_overrun=1;
1082 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1083 dev->stats.rx_errors++;
1084 dev->stats.rx_fifo_errors++;
1085 }
1086 SMC_ACK_INT(lp, INT_STS_RDFO_);
1087 }
1088 /* Handle receive condition */
1089 if ((status & INT_STS_RSFL_) || rx_overrun) {
1090 unsigned int fifo;
1091 DBG(SMC_DEBUG_RX, "%s: RX irq\n", dev->name);
1092 fifo = SMC_GET_RX_FIFO_INF(lp);
1093 pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1094 DBG(SMC_DEBUG_RX, "%s: Rx FIFO pkts %d, bytes %d\n",
1095 dev->name, pkts, fifo & 0xFFFF );
1096 if (pkts != 0) {
1097 #ifdef SMC_USE_DMA
1098 unsigned int fifo;
1099 if (lp->rxdma_active){
1100 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1101 "%s: RX DMA active\n", dev->name);
1102 /* The DMA is already running so up the IRQ threshold */
1103 fifo = SMC_GET_FIFO_INT(lp) & ~0xFF;
1104 fifo |= pkts & 0xFF;
1105 DBG(SMC_DEBUG_RX,
1106 "%s: Setting RX stat FIFO threshold to %d\n",
1107 dev->name, fifo & 0xff);
1108 SMC_SET_FIFO_INT(lp, fifo);
1109 } else
1110 #endif
1111 smc911x_rcv(dev);
1112 }
1113 SMC_ACK_INT(lp, INT_STS_RSFL_);
1114 }
1115 /* Handle transmit FIFO available */
1116 if (status & INT_STS_TDFA_) {
1117 DBG(SMC_DEBUG_TX, "%s: TX data FIFO space available irq\n", dev->name);
1118 SMC_SET_FIFO_TDA(lp, 0xFF);
1119 lp->tx_throttle = 0;
1120 #ifdef SMC_USE_DMA
1121 if (!lp->txdma_active)
1122 #endif
1123 netif_wake_queue(dev);
1124 SMC_ACK_INT(lp, INT_STS_TDFA_);
1125 }
1126 /* Handle transmit done condition */
1127 #if 1
1128 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1129 DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC,
1130 "%s: Tx stat FIFO limit (%d) /GPT irq\n",
1131 dev->name, (SMC_GET_FIFO_INT(lp) & 0x00ff0000) >> 16);
1132 smc911x_tx(dev);
1133 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1134 SMC_ACK_INT(lp, INT_STS_TSFL_);
1135 SMC_ACK_INT(lp, INT_STS_TSFL_ | INT_STS_GPT_INT_);
1136 }
1137 #else
1138 if (status & INT_STS_TSFL_) {
1139 DBG(SMC_DEBUG_TX, "%s: TX status FIFO limit (%d) irq \n", dev->name, );
1140 smc911x_tx(dev);
1141 SMC_ACK_INT(lp, INT_STS_TSFL_);
1142 }
1143
1144 if (status & INT_STS_GPT_INT_) {
1145 DBG(SMC_DEBUG_RX, "%s: IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1146 dev->name,
1147 SMC_GET_IRQ_CFG(lp),
1148 SMC_GET_FIFO_INT(lp),
1149 SMC_GET_RX_CFG(lp));
1150 DBG(SMC_DEBUG_RX, "%s: Rx Stat FIFO Used 0x%02x "
1151 "Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1152 dev->name,
1153 (SMC_GET_RX_FIFO_INF(lp) & 0x00ff0000) >> 16,
1154 SMC_GET_RX_FIFO_INF(lp) & 0xffff,
1155 SMC_GET_RX_STS_FIFO_PEEK(lp));
1156 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1157 SMC_ACK_INT(lp, INT_STS_GPT_INT_);
1158 }
1159 #endif
1160
1161 /* Handle PHY interrupt condition */
1162 if (status & INT_STS_PHY_INT_) {
1163 DBG(SMC_DEBUG_MISC, "%s: PHY irq\n", dev->name);
1164 smc911x_phy_interrupt(dev);
1165 SMC_ACK_INT(lp, INT_STS_PHY_INT_);
1166 }
1167 } while (--timeout);
1168
1169 /* restore mask state */
1170 SMC_SET_INT_EN(lp, mask);
1171
1172 DBG(SMC_DEBUG_MISC, "%s: Interrupt done (%d loops)\n",
1173 dev->name, 8-timeout);
1174
1175 spin_unlock_irqrestore(&lp->lock, flags);
1176
1177 DBG(3, "%s: Interrupt done (%d loops)\n", dev->name, 8-timeout);
1178
1179 return IRQ_HANDLED;
1180 }
1181
1182 #ifdef SMC_USE_DMA
1183 static void
1184 smc911x_tx_dma_irq(int dma, void *data)
1185 {
1186 struct net_device *dev = (struct net_device *)data;
1187 struct smc911x_local *lp = netdev_priv(dev);
1188 struct sk_buff *skb = lp->current_tx_skb;
1189 unsigned long flags;
1190
1191 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1192
1193 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: TX DMA irq handler\n", dev->name);
1194 /* Clear the DMA interrupt sources */
1195 SMC_DMA_ACK_IRQ(dev, dma);
1196 BUG_ON(skb == NULL);
1197 dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1198 dev->trans_start = jiffies;
1199 dev_kfree_skb_irq(skb);
1200 lp->current_tx_skb = NULL;
1201 if (lp->pending_tx_skb != NULL)
1202 smc911x_hardware_send_pkt(dev);
1203 else {
1204 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1205 "%s: No pending Tx packets. DMA disabled\n", dev->name);
1206 spin_lock_irqsave(&lp->lock, flags);
1207 lp->txdma_active = 0;
1208 if (!lp->tx_throttle) {
1209 netif_wake_queue(dev);
1210 }
1211 spin_unlock_irqrestore(&lp->lock, flags);
1212 }
1213
1214 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1215 "%s: TX DMA irq completed\n", dev->name);
1216 }
1217 static void
1218 smc911x_rx_dma_irq(int dma, void *data)
1219 {
1220 struct net_device *dev = (struct net_device *)data;
1221 unsigned long ioaddr = dev->base_addr;
1222 struct smc911x_local *lp = netdev_priv(dev);
1223 struct sk_buff *skb = lp->current_rx_skb;
1224 unsigned long flags;
1225 unsigned int pkts;
1226
1227 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1228 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, "%s: RX DMA irq handler\n", dev->name);
1229 /* Clear the DMA interrupt sources */
1230 SMC_DMA_ACK_IRQ(dev, dma);
1231 dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1232 BUG_ON(skb == NULL);
1233 lp->current_rx_skb = NULL;
1234 PRINT_PKT(skb->data, skb->len);
1235 dev->last_rx = jiffies;
1236 skb->protocol = eth_type_trans(skb, dev);
1237 dev->stats.rx_packets++;
1238 dev->stats.rx_bytes += skb->len;
1239 netif_rx(skb);
1240
1241 spin_lock_irqsave(&lp->lock, flags);
1242 pkts = (SMC_GET_RX_FIFO_INF() & RX_FIFO_INF_RXSUSED_) >> 16;
1243 if (pkts != 0) {
1244 smc911x_rcv(dev);
1245 }else {
1246 lp->rxdma_active = 0;
1247 }
1248 spin_unlock_irqrestore(&lp->lock, flags);
1249 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1250 "%s: RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1251 dev->name, pkts);
1252 }
1253 #endif /* SMC_USE_DMA */
1254
1255 #ifdef CONFIG_NET_POLL_CONTROLLER
1256 /*
1257 * Polling receive - used by netconsole and other diagnostic tools
1258 * to allow network i/o with interrupts disabled.
1259 */
1260 static void smc911x_poll_controller(struct net_device *dev)
1261 {
1262 disable_irq(dev->irq);
1263 smc911x_interrupt(dev->irq, dev);
1264 enable_irq(dev->irq);
1265 }
1266 #endif
1267
1268 /* Our watchdog timed out. Called by the networking layer */
1269 static void smc911x_timeout(struct net_device *dev)
1270 {
1271 struct smc911x_local *lp = netdev_priv(dev);
1272 int status, mask;
1273 unsigned long flags;
1274
1275 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1276
1277 spin_lock_irqsave(&lp->lock, flags);
1278 status = SMC_GET_INT(lp);
1279 mask = SMC_GET_INT_EN(lp);
1280 spin_unlock_irqrestore(&lp->lock, flags);
1281 DBG(SMC_DEBUG_MISC, "%s: INT 0x%02x MASK 0x%02x \n",
1282 dev->name, status, mask);
1283
1284 /* Dump the current TX FIFO contents and restart */
1285 mask = SMC_GET_TX_CFG(lp);
1286 SMC_SET_TX_CFG(lp, mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1287 /*
1288 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1289 * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1290 * which calls schedule(). Hence we use a work queue.
1291 */
1292 if (lp->phy_type != 0)
1293 schedule_work(&lp->phy_configure);
1294
1295 /* We can accept TX packets again */
1296 dev->trans_start = jiffies;
1297 netif_wake_queue(dev);
1298 }
1299
1300 /*
1301 * This routine will, depending on the values passed to it,
1302 * either make it accept multicast packets, go into
1303 * promiscuous mode (for TCPDUMP and cousins) or accept
1304 * a select set of multicast packets
1305 */
1306 static void smc911x_set_multicast_list(struct net_device *dev)
1307 {
1308 struct smc911x_local *lp = netdev_priv(dev);
1309 unsigned int multicast_table[2];
1310 unsigned int mcr, update_multicast = 0;
1311 unsigned long flags;
1312
1313 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1314
1315 spin_lock_irqsave(&lp->lock, flags);
1316 SMC_GET_MAC_CR(lp, mcr);
1317 spin_unlock_irqrestore(&lp->lock, flags);
1318
1319 if (dev->flags & IFF_PROMISC) {
1320
1321 DBG(SMC_DEBUG_MISC, "%s: RCR_PRMS\n", dev->name);
1322 mcr |= MAC_CR_PRMS_;
1323 }
1324 /*
1325 * Here, I am setting this to accept all multicast packets.
1326 * I don't need to zero the multicast table, because the flag is
1327 * checked before the table is
1328 */
1329 else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) {
1330 DBG(SMC_DEBUG_MISC, "%s: RCR_ALMUL\n", dev->name);
1331 mcr |= MAC_CR_MCPAS_;
1332 }
1333
1334 /*
1335 * This sets the internal hardware table to filter out unwanted
1336 * multicast packets before they take up memory.
1337 *
1338 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1339 * address are the offset into the table. If that bit is 1, then the
1340 * multicast packet is accepted. Otherwise, it's dropped silently.
1341 *
1342 * To use the 6 bits as an offset into the table, the high 1 bit is
1343 * the number of the 32 bit register, while the low 5 bits are the bit
1344 * within that register.
1345 */
1346 else if (dev->mc_count) {
1347 int i;
1348 struct dev_mc_list *cur_addr;
1349
1350 /* Set the Hash perfec mode */
1351 mcr |= MAC_CR_HPFILT_;
1352
1353 /* start with a table of all zeros: reject all */
1354 memset(multicast_table, 0, sizeof(multicast_table));
1355
1356 cur_addr = dev->mc_list;
1357 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
1358 u32 position;
1359
1360 /* do we have a pointer here? */
1361 if (!cur_addr)
1362 break;
1363 /* make sure this is a multicast address -
1364 shouldn't this be a given if we have it here ? */
1365 if (!(*cur_addr->dmi_addr & 1))
1366 continue;
1367
1368 /* upper 6 bits are used as hash index */
1369 position = ether_crc(ETH_ALEN, cur_addr->dmi_addr)>>26;
1370
1371 multicast_table[position>>5] |= 1 << (position&0x1f);
1372 }
1373
1374 /* be sure I get rid of flags I might have set */
1375 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1376
1377 /* now, the table can be loaded into the chipset */
1378 update_multicast = 1;
1379 } else {
1380 DBG(SMC_DEBUG_MISC, "%s: ~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n",
1381 dev->name);
1382 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1383
1384 /*
1385 * since I'm disabling all multicast entirely, I need to
1386 * clear the multicast list
1387 */
1388 memset(multicast_table, 0, sizeof(multicast_table));
1389 update_multicast = 1;
1390 }
1391
1392 spin_lock_irqsave(&lp->lock, flags);
1393 SMC_SET_MAC_CR(lp, mcr);
1394 if (update_multicast) {
1395 DBG(SMC_DEBUG_MISC,
1396 "%s: update mcast hash table 0x%08x 0x%08x\n",
1397 dev->name, multicast_table[0], multicast_table[1]);
1398 SMC_SET_HASHL(lp, multicast_table[0]);
1399 SMC_SET_HASHH(lp, multicast_table[1]);
1400 }
1401 spin_unlock_irqrestore(&lp->lock, flags);
1402 }
1403
1404
1405 /*
1406 * Open and Initialize the board
1407 *
1408 * Set up everything, reset the card, etc..
1409 */
1410 static int
1411 smc911x_open(struct net_device *dev)
1412 {
1413 struct smc911x_local *lp = netdev_priv(dev);
1414
1415 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1416
1417 /*
1418 * Check that the address is valid. If its not, refuse
1419 * to bring the device up. The user must specify an
1420 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1421 */
1422 if (!is_valid_ether_addr(dev->dev_addr)) {
1423 PRINTK("%s: no valid ethernet hw addr\n", __FUNCTION__);
1424 return -EINVAL;
1425 }
1426
1427 /* reset the hardware */
1428 smc911x_reset(dev);
1429
1430 /* Configure the PHY, initialize the link state */
1431 smc911x_phy_configure(&lp->phy_configure);
1432
1433 /* Turn on Tx + Rx */
1434 smc911x_enable(dev);
1435
1436 netif_start_queue(dev);
1437
1438 return 0;
1439 }
1440
1441 /*
1442 * smc911x_close
1443 *
1444 * this makes the board clean up everything that it can
1445 * and not talk to the outside world. Caused by
1446 * an 'ifconfig ethX down'
1447 */
1448 static int smc911x_close(struct net_device *dev)
1449 {
1450 struct smc911x_local *lp = netdev_priv(dev);
1451
1452 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1453
1454 netif_stop_queue(dev);
1455 netif_carrier_off(dev);
1456
1457 /* clear everything */
1458 smc911x_shutdown(dev);
1459
1460 if (lp->phy_type != 0) {
1461 /* We need to ensure that no calls to
1462 * smc911x_phy_configure are pending.
1463 */
1464 cancel_work_sync(&lp->phy_configure);
1465 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1466 }
1467
1468 if (lp->pending_tx_skb) {
1469 dev_kfree_skb(lp->pending_tx_skb);
1470 lp->pending_tx_skb = NULL;
1471 }
1472
1473 return 0;
1474 }
1475
1476 /*
1477 * Ethtool support
1478 */
1479 static int
1480 smc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1481 {
1482 struct smc911x_local *lp = netdev_priv(dev);
1483 int ret, status;
1484 unsigned long flags;
1485
1486 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1487 cmd->maxtxpkt = 1;
1488 cmd->maxrxpkt = 1;
1489
1490 if (lp->phy_type != 0) {
1491 spin_lock_irqsave(&lp->lock, flags);
1492 ret = mii_ethtool_gset(&lp->mii, cmd);
1493 spin_unlock_irqrestore(&lp->lock, flags);
1494 } else {
1495 cmd->supported = SUPPORTED_10baseT_Half |
1496 SUPPORTED_10baseT_Full |
1497 SUPPORTED_TP | SUPPORTED_AUI;
1498
1499 if (lp->ctl_rspeed == 10)
1500 cmd->speed = SPEED_10;
1501 else if (lp->ctl_rspeed == 100)
1502 cmd->speed = SPEED_100;
1503
1504 cmd->autoneg = AUTONEG_DISABLE;
1505 if (lp->mii.phy_id==1)
1506 cmd->transceiver = XCVR_INTERNAL;
1507 else
1508 cmd->transceiver = XCVR_EXTERNAL;
1509 cmd->port = 0;
1510 SMC_GET_PHY_SPECIAL(lp, lp->mii.phy_id, status);
1511 cmd->duplex =
1512 (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1513 DUPLEX_FULL : DUPLEX_HALF;
1514 ret = 0;
1515 }
1516
1517 return ret;
1518 }
1519
1520 static int
1521 smc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1522 {
1523 struct smc911x_local *lp = netdev_priv(dev);
1524 int ret;
1525 unsigned long flags;
1526
1527 if (lp->phy_type != 0) {
1528 spin_lock_irqsave(&lp->lock, flags);
1529 ret = mii_ethtool_sset(&lp->mii, cmd);
1530 spin_unlock_irqrestore(&lp->lock, flags);
1531 } else {
1532 if (cmd->autoneg != AUTONEG_DISABLE ||
1533 cmd->speed != SPEED_10 ||
1534 (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1535 (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1536 return -EINVAL;
1537
1538 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1539
1540 ret = 0;
1541 }
1542
1543 return ret;
1544 }
1545
1546 static void
1547 smc911x_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1548 {
1549 strncpy(info->driver, CARDNAME, sizeof(info->driver));
1550 strncpy(info->version, version, sizeof(info->version));
1551 strncpy(info->bus_info, dev->dev.parent->bus_id, sizeof(info->bus_info));
1552 }
1553
1554 static int smc911x_ethtool_nwayreset(struct net_device *dev)
1555 {
1556 struct smc911x_local *lp = netdev_priv(dev);
1557 int ret = -EINVAL;
1558 unsigned long flags;
1559
1560 if (lp->phy_type != 0) {
1561 spin_lock_irqsave(&lp->lock, flags);
1562 ret = mii_nway_restart(&lp->mii);
1563 spin_unlock_irqrestore(&lp->lock, flags);
1564 }
1565
1566 return ret;
1567 }
1568
1569 static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1570 {
1571 struct smc911x_local *lp = netdev_priv(dev);
1572 return lp->msg_enable;
1573 }
1574
1575 static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1576 {
1577 struct smc911x_local *lp = netdev_priv(dev);
1578 lp->msg_enable = level;
1579 }
1580
1581 static int smc911x_ethtool_getregslen(struct net_device *dev)
1582 {
1583 /* System regs + MAC regs + PHY regs */
1584 return (((E2P_CMD - ID_REV)/4 + 1) +
1585 (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1586 }
1587
1588 static void smc911x_ethtool_getregs(struct net_device *dev,
1589 struct ethtool_regs* regs, void *buf)
1590 {
1591 struct smc911x_local *lp = netdev_priv(dev);
1592 unsigned long flags;
1593 u32 reg,i,j=0;
1594 u32 *data = (u32*)buf;
1595
1596 regs->version = lp->version;
1597 for(i=ID_REV;i<=E2P_CMD;i+=4) {
1598 data[j++] = SMC_inl(lp, i);
1599 }
1600 for(i=MAC_CR;i<=WUCSR;i++) {
1601 spin_lock_irqsave(&lp->lock, flags);
1602 SMC_GET_MAC_CSR(lp, i, reg);
1603 spin_unlock_irqrestore(&lp->lock, flags);
1604 data[j++] = reg;
1605 }
1606 for(i=0;i<=31;i++) {
1607 spin_lock_irqsave(&lp->lock, flags);
1608 SMC_GET_MII(lp, i, lp->mii.phy_id, reg);
1609 spin_unlock_irqrestore(&lp->lock, flags);
1610 data[j++] = reg & 0xFFFF;
1611 }
1612 }
1613
1614 static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1615 {
1616 struct smc911x_local *lp = netdev_priv(dev);
1617 unsigned int timeout;
1618 int e2p_cmd;
1619
1620 e2p_cmd = SMC_GET_E2P_CMD(lp);
1621 for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1622 if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1623 PRINTK("%s: %s timeout waiting for EEPROM to respond\n",
1624 dev->name, __FUNCTION__);
1625 return -EFAULT;
1626 }
1627 mdelay(1);
1628 e2p_cmd = SMC_GET_E2P_CMD(lp);
1629 }
1630 if (timeout == 0) {
1631 PRINTK("%s: %s timeout waiting for EEPROM CMD not busy\n",
1632 dev->name, __FUNCTION__);
1633 return -ETIMEDOUT;
1634 }
1635 return 0;
1636 }
1637
1638 static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1639 int cmd, int addr)
1640 {
1641 struct smc911x_local *lp = netdev_priv(dev);
1642 int ret;
1643
1644 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1645 return ret;
1646 SMC_SET_E2P_CMD(lp, E2P_CMD_EPC_BUSY_ |
1647 ((cmd) & (0x7<<28)) |
1648 ((addr) & 0xFF));
1649 return 0;
1650 }
1651
1652 static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1653 u8 *data)
1654 {
1655 struct smc911x_local *lp = netdev_priv(dev);
1656 int ret;
1657
1658 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1659 return ret;
1660 *data = SMC_GET_E2P_DATA(lp);
1661 return 0;
1662 }
1663
1664 static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1665 u8 data)
1666 {
1667 struct smc911x_local *lp = netdev_priv(dev);
1668 int ret;
1669
1670 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1671 return ret;
1672 SMC_SET_E2P_DATA(lp, data);
1673 return 0;
1674 }
1675
1676 static int smc911x_ethtool_geteeprom(struct net_device *dev,
1677 struct ethtool_eeprom *eeprom, u8 *data)
1678 {
1679 u8 eebuf[SMC911X_EEPROM_LEN];
1680 int i, ret;
1681
1682 for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1683 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1684 return ret;
1685 if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1686 return ret;
1687 }
1688 memcpy(data, eebuf+eeprom->offset, eeprom->len);
1689 return 0;
1690 }
1691
1692 static int smc911x_ethtool_seteeprom(struct net_device *dev,
1693 struct ethtool_eeprom *eeprom, u8 *data)
1694 {
1695 int i, ret;
1696
1697 /* Enable erase */
1698 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1699 return ret;
1700 for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1701 /* erase byte */
1702 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1703 return ret;
1704 /* write byte */
1705 if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1706 return ret;
1707 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1708 return ret;
1709 }
1710 return 0;
1711 }
1712
1713 static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1714 {
1715 return SMC911X_EEPROM_LEN;
1716 }
1717
1718 static const struct ethtool_ops smc911x_ethtool_ops = {
1719 .get_settings = smc911x_ethtool_getsettings,
1720 .set_settings = smc911x_ethtool_setsettings,
1721 .get_drvinfo = smc911x_ethtool_getdrvinfo,
1722 .get_msglevel = smc911x_ethtool_getmsglevel,
1723 .set_msglevel = smc911x_ethtool_setmsglevel,
1724 .nway_reset = smc911x_ethtool_nwayreset,
1725 .get_link = ethtool_op_get_link,
1726 .get_regs_len = smc911x_ethtool_getregslen,
1727 .get_regs = smc911x_ethtool_getregs,
1728 .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1729 .get_eeprom = smc911x_ethtool_geteeprom,
1730 .set_eeprom = smc911x_ethtool_seteeprom,
1731 };
1732
1733 /*
1734 * smc911x_findirq
1735 *
1736 * This routine has a simple purpose -- make the SMC chip generate an
1737 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1738 */
1739 static int __init smc911x_findirq(struct net_device *dev)
1740 {
1741 struct smc911x_local *lp = netdev_priv(dev);
1742 int timeout = 20;
1743 unsigned long cookie;
1744
1745 DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
1746
1747 cookie = probe_irq_on();
1748
1749 /*
1750 * Force a SW interrupt
1751 */
1752
1753 SMC_SET_INT_EN(lp, INT_EN_SW_INT_EN_);
1754
1755 /*
1756 * Wait until positive that the interrupt has been generated
1757 */
1758 do {
1759 int int_status;
1760 udelay(10);
1761 int_status = SMC_GET_INT_EN(lp);
1762 if (int_status & INT_EN_SW_INT_EN_)
1763 break; /* got the interrupt */
1764 } while (--timeout);
1765
1766 /*
1767 * there is really nothing that I can do here if timeout fails,
1768 * as autoirq_report will return a 0 anyway, which is what I
1769 * want in this case. Plus, the clean up is needed in both
1770 * cases.
1771 */
1772
1773 /* and disable all interrupts again */
1774 SMC_SET_INT_EN(lp, 0);
1775
1776 /* and return what I found */
1777 return probe_irq_off(cookie);
1778 }
1779
1780 /*
1781 * Function: smc911x_probe(unsigned long ioaddr)
1782 *
1783 * Purpose:
1784 * Tests to see if a given ioaddr points to an SMC911x chip.
1785 * Returns a 0 on success
1786 *
1787 * Algorithm:
1788 * (1) see if the endian word is OK
1789 * (1) see if I recognize the chip ID in the appropriate register
1790 *
1791 * Here I do typical initialization tasks.
1792 *
1793 * o Initialize the structure if needed
1794 * o print out my vanity message if not done so already
1795 * o print out what type of hardware is detected
1796 * o print out the ethernet address
1797 * o find the IRQ
1798 * o set up my private data
1799 * o configure the dev structure with my subroutines
1800 * o actually GRAB the irq.
1801 * o GRAB the region
1802 */
1803 static int __init smc911x_probe(struct net_device *dev)
1804 {
1805 struct smc911x_local *lp = netdev_priv(dev);
1806 int i, retval;
1807 unsigned int val, chip_id, revision;
1808 const char *version_string;
1809 unsigned long irq_flags;
1810
1811 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1812
1813 /* First, see if the endian word is recognized */
1814 val = SMC_GET_BYTE_TEST(lp);
1815 DBG(SMC_DEBUG_MISC, "%s: endian probe returned 0x%04x\n", CARDNAME, val);
1816 if (val != 0x87654321) {
1817 printk(KERN_ERR "Invalid chip endian 0x08%x\n",val);
1818 retval = -ENODEV;
1819 goto err_out;
1820 }
1821
1822 /*
1823 * check if the revision register is something that I
1824 * recognize. These might need to be added to later,
1825 * as future revisions could be added.
1826 */
1827 chip_id = SMC_GET_PN(lp);
1828 DBG(SMC_DEBUG_MISC, "%s: id probe returned 0x%04x\n", CARDNAME, chip_id);
1829 for(i=0;chip_ids[i].id != 0; i++) {
1830 if (chip_ids[i].id == chip_id) break;
1831 }
1832 if (!chip_ids[i].id) {
1833 printk(KERN_ERR "Unknown chip ID %04x\n", chip_id);
1834 retval = -ENODEV;
1835 goto err_out;
1836 }
1837 version_string = chip_ids[i].name;
1838
1839 revision = SMC_GET_REV(lp);
1840 DBG(SMC_DEBUG_MISC, "%s: revision = 0x%04x\n", CARDNAME, revision);
1841
1842 /* At this point I'll assume that the chip is an SMC911x. */
1843 DBG(SMC_DEBUG_MISC, "%s: Found a %s\n", CARDNAME, chip_ids[i].name);
1844
1845 /* Validate the TX FIFO size requested */
1846 if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1847 printk(KERN_ERR "Invalid TX FIFO size requested %d\n", tx_fifo_kb);
1848 retval = -EINVAL;
1849 goto err_out;
1850 }
1851
1852 /* fill in some of the fields */
1853 lp->version = chip_ids[i].id;
1854 lp->revision = revision;
1855 lp->tx_fifo_kb = tx_fifo_kb;
1856 /* Reverse calculate the RX FIFO size from the TX */
1857 lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1858 lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1859
1860 /* Set the automatic flow control values */
1861 switch(lp->tx_fifo_kb) {
1862 /*
1863 * AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1864 * AFC_LO is AFC_HI/2
1865 * BACK_DUR is about 5uS*(AFC_LO) rounded down
1866 */
1867 case 2:/* 13440 Rx Data Fifo Size */
1868 lp->afc_cfg=0x008C46AF;break;
1869 case 3:/* 12480 Rx Data Fifo Size */
1870 lp->afc_cfg=0x0082419F;break;
1871 case 4:/* 11520 Rx Data Fifo Size */
1872 lp->afc_cfg=0x00783C9F;break;
1873 case 5:/* 10560 Rx Data Fifo Size */
1874 lp->afc_cfg=0x006E374F;break;
1875 case 6:/* 9600 Rx Data Fifo Size */
1876 lp->afc_cfg=0x0064328F;break;
1877 case 7:/* 8640 Rx Data Fifo Size */
1878 lp->afc_cfg=0x005A2D7F;break;
1879 case 8:/* 7680 Rx Data Fifo Size */
1880 lp->afc_cfg=0x0050287F;break;
1881 case 9:/* 6720 Rx Data Fifo Size */
1882 lp->afc_cfg=0x0046236F;break;
1883 case 10:/* 5760 Rx Data Fifo Size */
1884 lp->afc_cfg=0x003C1E6F;break;
1885 case 11:/* 4800 Rx Data Fifo Size */
1886 lp->afc_cfg=0x0032195F;break;
1887 /*
1888 * AFC_HI is ~1520 bytes less than RX Data Fifo Size
1889 * AFC_LO is AFC_HI/2
1890 * BACK_DUR is about 5uS*(AFC_LO) rounded down
1891 */
1892 case 12:/* 3840 Rx Data Fifo Size */
1893 lp->afc_cfg=0x0024124F;break;
1894 case 13:/* 2880 Rx Data Fifo Size */
1895 lp->afc_cfg=0x0015073F;break;
1896 case 14:/* 1920 Rx Data Fifo Size */
1897 lp->afc_cfg=0x0006032F;break;
1898 default:
1899 PRINTK("%s: ERROR -- no AFC_CFG setting found",
1900 dev->name);
1901 break;
1902 }
1903
1904 DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX,
1905 "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1906 lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1907
1908 spin_lock_init(&lp->lock);
1909
1910 /* Get the MAC address */
1911 SMC_GET_MAC_ADDR(lp, dev->dev_addr);
1912
1913 /* now, reset the chip, and put it into a known state */
1914 smc911x_reset(dev);
1915
1916 /*
1917 * If dev->irq is 0, then the device has to be banged on to see
1918 * what the IRQ is.
1919 *
1920 * Specifying an IRQ is done with the assumption that the user knows
1921 * what (s)he is doing. No checking is done!!!!
1922 */
1923 if (dev->irq < 1) {
1924 int trials;
1925
1926 trials = 3;
1927 while (trials--) {
1928 dev->irq = smc911x_findirq(dev);
1929 if (dev->irq)
1930 break;
1931 /* kick the card and try again */
1932 smc911x_reset(dev);
1933 }
1934 }
1935 if (dev->irq == 0) {
1936 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
1937 dev->name);
1938 retval = -ENODEV;
1939 goto err_out;
1940 }
1941 dev->irq = irq_canonicalize(dev->irq);
1942
1943 /* Fill in the fields of the device structure with ethernet values. */
1944 ether_setup(dev);
1945
1946 dev->open = smc911x_open;
1947 dev->stop = smc911x_close;
1948 dev->hard_start_xmit = smc911x_hard_start_xmit;
1949 dev->tx_timeout = smc911x_timeout;
1950 dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1951 dev->set_multicast_list = smc911x_set_multicast_list;
1952 dev->ethtool_ops = &smc911x_ethtool_ops;
1953 #ifdef CONFIG_NET_POLL_CONTROLLER
1954 dev->poll_controller = smc911x_poll_controller;
1955 #endif
1956
1957 INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
1958 lp->mii.phy_id_mask = 0x1f;
1959 lp->mii.reg_num_mask = 0x1f;
1960 lp->mii.force_media = 0;
1961 lp->mii.full_duplex = 0;
1962 lp->mii.dev = dev;
1963 lp->mii.mdio_read = smc911x_phy_read;
1964 lp->mii.mdio_write = smc911x_phy_write;
1965
1966 /*
1967 * Locate the phy, if any.
1968 */
1969 smc911x_phy_detect(dev);
1970
1971 /* Set default parameters */
1972 lp->msg_enable = NETIF_MSG_LINK;
1973 lp->ctl_rfduplx = 1;
1974 lp->ctl_rspeed = 100;
1975
1976 #ifdef SMC_DYNAMIC_BUS_CONFIG
1977 irq_flags = lp->cfg.irq_flags;
1978 #else
1979 irq_flags = IRQF_SHARED | SMC_IRQ_SENSE;
1980 #endif
1981
1982 /* Grab the IRQ */
1983 retval = request_irq(dev->irq, &smc911x_interrupt,
1984 irq_flags, dev->name, dev);
1985 if (retval)
1986 goto err_out;
1987
1988 #ifdef SMC_USE_DMA
1989 lp->rxdma = SMC_DMA_REQUEST(dev, smc911x_rx_dma_irq);
1990 lp->txdma = SMC_DMA_REQUEST(dev, smc911x_tx_dma_irq);
1991 lp->rxdma_active = 0;
1992 lp->txdma_active = 0;
1993 dev->dma = lp->rxdma;
1994 #endif
1995
1996 retval = register_netdev(dev);
1997 if (retval == 0) {
1998 /* now, print out the card info, in a short format.. */
1999 printk("%s: %s (rev %d) at %#lx IRQ %d",
2000 dev->name, version_string, lp->revision,
2001 dev->base_addr, dev->irq);
2002
2003 #ifdef SMC_USE_DMA
2004 if (lp->rxdma != -1)
2005 printk(" RXDMA %d ", lp->rxdma);
2006
2007 if (lp->txdma != -1)
2008 printk("TXDMA %d", lp->txdma);
2009 #endif
2010 printk("\n");
2011 if (!is_valid_ether_addr(dev->dev_addr)) {
2012 printk("%s: Invalid ethernet MAC address. Please "
2013 "set using ifconfig\n", dev->name);
2014 } else {
2015 /* Print the Ethernet address */
2016 printk("%s: Ethernet addr: ", dev->name);
2017 for (i = 0; i < 5; i++)
2018 printk("%2.2x:", dev->dev_addr[i]);
2019 printk("%2.2x\n", dev->dev_addr[5]);
2020 }
2021
2022 if (lp->phy_type == 0) {
2023 PRINTK("%s: No PHY found\n", dev->name);
2024 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2025 PRINTK("%s: LAN911x Internal PHY\n", dev->name);
2026 } else {
2027 PRINTK("%s: External PHY 0x%08x\n", dev->name, lp->phy_type);
2028 }
2029 }
2030
2031 err_out:
2032 #ifdef SMC_USE_DMA
2033 if (retval) {
2034 if (lp->rxdma != -1) {
2035 SMC_DMA_FREE(dev, lp->rxdma);
2036 }
2037 if (lp->txdma != -1) {
2038 SMC_DMA_FREE(dev, lp->txdma);
2039 }
2040 }
2041 #endif
2042 return retval;
2043 }
2044
2045 /*
2046 * smc911x_init(void)
2047 *
2048 * Output:
2049 * 0 --> there is a device
2050 * anything else, error
2051 */
2052 static int smc911x_drv_probe(struct platform_device *pdev)
2053 {
2054 struct smc91x_platdata *pd = pdev->dev.platform_data;
2055 struct net_device *ndev;
2056 struct resource *res;
2057 struct smc911x_local *lp;
2058 unsigned int *addr;
2059 int ret;
2060
2061 DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2062 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2063 if (!res) {
2064 ret = -ENODEV;
2065 goto out;
2066 }
2067
2068 /*
2069 * Request the regions.
2070 */
2071 if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2072 ret = -EBUSY;
2073 goto out;
2074 }
2075
2076 ndev = alloc_etherdev(sizeof(struct smc911x_local));
2077 if (!ndev) {
2078 printk("%s: could not allocate device.\n", CARDNAME);
2079 ret = -ENOMEM;
2080 goto release_1;
2081 }
2082 SET_NETDEV_DEV(ndev, &pdev->dev);
2083
2084 ndev->dma = (unsigned char)-1;
2085 ndev->irq = platform_get_irq(pdev, 0);
2086 lp = netdev_priv(ndev);
2087 lp->netdev = ndev;
2088 #ifdef SMC_DYNAMIC_BUS_CONFIG
2089 if (!pd) {
2090 ret = -EINVAL;
2091 goto release_both;
2092 }
2093 memcpy(&lp->cfg, pd, sizeof(lp->cfg));
2094 #endif
2095
2096 addr = ioremap(res->start, SMC911X_IO_EXTENT);
2097 if (!addr) {
2098 ret = -ENOMEM;
2099 goto release_both;
2100 }
2101
2102 platform_set_drvdata(pdev, ndev);
2103 lp->base = addr;
2104 ndev->base_addr = res->start;
2105 ret = smc911x_probe(ndev);
2106 if (ret != 0) {
2107 platform_set_drvdata(pdev, NULL);
2108 iounmap(addr);
2109 release_both:
2110 free_netdev(ndev);
2111 release_1:
2112 release_mem_region(res->start, SMC911X_IO_EXTENT);
2113 out:
2114 printk("%s: not found (%d).\n", CARDNAME, ret);
2115 }
2116 #ifdef SMC_USE_DMA
2117 else {
2118 lp->physaddr = res->start;
2119 lp->dev = &pdev->dev;
2120 }
2121 #endif
2122
2123 return ret;
2124 }
2125
2126 static int smc911x_drv_remove(struct platform_device *pdev)
2127 {
2128 struct net_device *ndev = platform_get_drvdata(pdev);
2129 struct smc911x_local *lp = netdev_priv(ndev);
2130 struct resource *res;
2131
2132 DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2133 platform_set_drvdata(pdev, NULL);
2134
2135 unregister_netdev(ndev);
2136
2137 free_irq(ndev->irq, ndev);
2138
2139 #ifdef SMC_USE_DMA
2140 {
2141 if (lp->rxdma != -1) {
2142 SMC_DMA_FREE(dev, lp->rxdma);
2143 }
2144 if (lp->txdma != -1) {
2145 SMC_DMA_FREE(dev, lp->txdma);
2146 }
2147 }
2148 #endif
2149 iounmap(lp->base);
2150 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2151 release_mem_region(res->start, SMC911X_IO_EXTENT);
2152
2153 free_netdev(ndev);
2154 return 0;
2155 }
2156
2157 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2158 {
2159 struct net_device *ndev = platform_get_drvdata(dev);
2160 struct smc911x_local *lp = netdev_priv(ndev);
2161
2162 DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2163 if (ndev) {
2164 if (netif_running(ndev)) {
2165 netif_device_detach(ndev);
2166 smc911x_shutdown(ndev);
2167 #if POWER_DOWN
2168 /* Set D2 - Energy detect only setting */
2169 SMC_SET_PMT_CTRL(lp, 2<<12);
2170 #endif
2171 }
2172 }
2173 return 0;
2174 }
2175
2176 static int smc911x_drv_resume(struct platform_device *dev)
2177 {
2178 struct net_device *ndev = platform_get_drvdata(dev);
2179
2180 DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2181 if (ndev) {
2182 struct smc911x_local *lp = netdev_priv(ndev);
2183
2184 if (netif_running(ndev)) {
2185 smc911x_reset(ndev);
2186 smc911x_enable(ndev);
2187 if (lp->phy_type != 0)
2188 smc911x_phy_configure(&lp->phy_configure);
2189 netif_device_attach(ndev);
2190 }
2191 }
2192 return 0;
2193 }
2194
2195 static struct platform_driver smc911x_driver = {
2196 .probe = smc911x_drv_probe,
2197 .remove = smc911x_drv_remove,
2198 .suspend = smc911x_drv_suspend,
2199 .resume = smc911x_drv_resume,
2200 .driver = {
2201 .name = CARDNAME,
2202 .owner = THIS_MODULE,
2203 },
2204 };
2205
2206 static int __init smc911x_init(void)
2207 {
2208 return platform_driver_register(&smc911x_driver);
2209 }
2210
2211 static void __exit smc911x_cleanup(void)
2212 {
2213 platform_driver_unregister(&smc911x_driver);
2214 }
2215
2216 module_init(smc911x_init);
2217 module_exit(smc911x_cleanup);
Support for the Chinese Samsung S3C2440 based development boards