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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / net / ethernet / smsc / smc911x.c
blob313ba3b32ab476be80d43f4b4773271f1b17760e
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/delay.h>
63 #include <linux/interrupt.h>
64 #include <linux/errno.h>
65 #include <linux/ioport.h>
66 #include <linux/crc32.h>
67 #include <linux/device.h>
68 #include <linux/platform_device.h>
69 #include <linux/spinlock.h>
70 #include <linux/ethtool.h>
71 #include <linux/mii.h>
72 #include <linux/workqueue.h>
73
74 #include <linux/netdevice.h>
75 #include <linux/etherdevice.h>
76 #include <linux/skbuff.h>
77
78 #include <asm/io.h>
79
80 #include "smc911x.h"
81
82 /*
83 * Transmit timeout, default 5 seconds.
84 */
85 static int watchdog = 5000;
86 module_param(watchdog, int, 0400);
87 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
88
89 static int tx_fifo_kb=8;
90 module_param(tx_fifo_kb, int, 0400);
91 MODULE_PARM_DESC(tx_fifo_kb,"transmit FIFO size in KB (1<x<15)(default=8)");
92
93 MODULE_LICENSE("GPL");
94 MODULE_ALIAS("platform:smc911x");
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 #if SMC_DEBUG > 0
109 #define DBG(n, args...) \
110 do { \
111 if (SMC_DEBUG & (n)) \
112 printk(args); \
113 } while (0)
114
115 #define PRINTK(args...) printk(args)
116 #else
117 #define DBG(n, args...) do { } while (0)
118 #define PRINTK(args...) printk(KERN_DEBUG args)
119 #endif
120
121 #if SMC_DEBUG_PKTS > 0
122 static void PRINT_PKT(u_char *buf, int length)
123 {
124 int i;
125 int remainder;
126 int lines;
127
128 lines = length / 16;
129 remainder = length % 16;
130
131 for (i = 0; i < lines ; i ++) {
132 int cur;
133 for (cur = 0; cur < 8; cur++) {
134 u_char a, b;
135 a = *buf++;
136 b = *buf++;
137 printk("%02x%02x ", a, b);
138 }
139 printk("\n");
140 }
141 for (i = 0; i < remainder/2 ; i++) {
142 u_char a, b;
143 a = *buf++;
144 b = *buf++;
145 printk("%02x%02x ", a, b);
146 }
147 printk("\n");
148 }
149 #else
150 #define PRINT_PKT(x...) do { } while (0)
151 #endif
152
153
154 /* this enables an interrupt in the interrupt mask register */
155 #define SMC_ENABLE_INT(lp, x) do { \
156 unsigned int __mask; \
157 __mask = SMC_GET_INT_EN((lp)); \
158 __mask |= (x); \
159 SMC_SET_INT_EN((lp), __mask); \
160 } while (0)
161
162 /* this disables an interrupt from the interrupt mask register */
163 #define SMC_DISABLE_INT(lp, x) do { \
164 unsigned int __mask; \
165 __mask = SMC_GET_INT_EN((lp)); \
166 __mask &= ~(x); \
167 SMC_SET_INT_EN((lp), __mask); \
168 } while (0)
169
170 /*
171 * this does a soft reset on the device
172 */
173 static void smc911x_reset(struct net_device *dev)
174 {
175 struct smc911x_local *lp = netdev_priv(dev);
176 unsigned int reg, timeout=0, resets=1, irq_cfg;
177 unsigned long flags;
178
179 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
180
181 /* Take out of PM setting first */
182 if ((SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_) == 0) {
183 /* Write to the bytetest will take out of powerdown */
184 SMC_SET_BYTE_TEST(lp, 0);
185 timeout=10;
186 do {
187 udelay(10);
188 reg = SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_;
189 } while (--timeout && !reg);
190 if (timeout == 0) {
191 PRINTK("%s: smc911x_reset timeout waiting for PM restore\n", dev->name);
192 return;
193 }
194 }
195
196 /* Disable all interrupts */
197 spin_lock_irqsave(&lp->lock, flags);
198 SMC_SET_INT_EN(lp, 0);
199 spin_unlock_irqrestore(&lp->lock, flags);
200
201 while (resets--) {
202 SMC_SET_HW_CFG(lp, HW_CFG_SRST_);
203 timeout=10;
204 do {
205 udelay(10);
206 reg = SMC_GET_HW_CFG(lp);
207 /* If chip indicates reset timeout then try again */
208 if (reg & HW_CFG_SRST_TO_) {
209 PRINTK("%s: chip reset timeout, retrying...\n", dev->name);
210 resets++;
211 break;
212 }
213 } while (--timeout && (reg & HW_CFG_SRST_));
214 }
215 if (timeout == 0) {
216 PRINTK("%s: smc911x_reset timeout waiting for reset\n", dev->name);
217 return;
218 }
219
220 /* make sure EEPROM has finished loading before setting GPIO_CFG */
221 timeout=1000;
222 while (--timeout && (SMC_GET_E2P_CMD(lp) & E2P_CMD_EPC_BUSY_))
223 udelay(10);
224
225 if (timeout == 0){
226 PRINTK("%s: smc911x_reset timeout waiting for EEPROM busy\n", dev->name);
227 return;
228 }
229
230 /* Initialize interrupts */
231 SMC_SET_INT_EN(lp, 0);
232 SMC_ACK_INT(lp, -1);
233
234 /* Reset the FIFO level and flow control settings */
235 SMC_SET_HW_CFG(lp, (lp->tx_fifo_kb & 0xF) << 16);
236 //TODO: Figure out what appropriate pause time is
237 SMC_SET_FLOW(lp, FLOW_FCPT_ | FLOW_FCEN_);
238 SMC_SET_AFC_CFG(lp, lp->afc_cfg);
239
240
241 /* Set to LED outputs */
242 SMC_SET_GPIO_CFG(lp, 0x70070000);
243
244 /*
245 * Deassert IRQ for 1*10us for edge type interrupts
246 * and drive IRQ pin push-pull
247 */
248 irq_cfg = (1 << 24) | INT_CFG_IRQ_EN_ | INT_CFG_IRQ_TYPE_;
249 #ifdef SMC_DYNAMIC_BUS_CONFIG
250 if (lp->cfg.irq_polarity)
251 irq_cfg |= INT_CFG_IRQ_POL_;
252 #endif
253 SMC_SET_IRQ_CFG(lp, irq_cfg);
254
255 /* clear anything saved */
256 if (lp->pending_tx_skb != NULL) {
257 dev_kfree_skb (lp->pending_tx_skb);
258 lp->pending_tx_skb = NULL;
259 dev->stats.tx_errors++;
260 dev->stats.tx_aborted_errors++;
261 }
262 }
263
264 /*
265 * Enable Interrupts, Receive, and Transmit
266 */
267 static void smc911x_enable(struct net_device *dev)
268 {
269 struct smc911x_local *lp = netdev_priv(dev);
270 unsigned mask, cfg, cr;
271 unsigned long flags;
272
273 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
274
275 spin_lock_irqsave(&lp->lock, flags);
276
277 SMC_SET_MAC_ADDR(lp, dev->dev_addr);
278
279 /* Enable TX */
280 cfg = SMC_GET_HW_CFG(lp);
281 cfg &= HW_CFG_TX_FIF_SZ_ | 0xFFF;
282 cfg |= HW_CFG_SF_;
283 SMC_SET_HW_CFG(lp, cfg);
284 SMC_SET_FIFO_TDA(lp, 0xFF);
285 /* Update TX stats on every 64 packets received or every 1 sec */
286 SMC_SET_FIFO_TSL(lp, 64);
287 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
288
289 SMC_GET_MAC_CR(lp, cr);
290 cr |= MAC_CR_TXEN_ | MAC_CR_HBDIS_;
291 SMC_SET_MAC_CR(lp, cr);
292 SMC_SET_TX_CFG(lp, TX_CFG_TX_ON_);
293
294 /* Add 2 byte padding to start of packets */
295 SMC_SET_RX_CFG(lp, (2<<8) & RX_CFG_RXDOFF_);
296
297 /* Turn on receiver and enable RX */
298 if (cr & MAC_CR_RXEN_)
299 DBG(SMC_DEBUG_RX, "%s: Receiver already enabled\n", dev->name);
300
301 SMC_SET_MAC_CR(lp, cr | MAC_CR_RXEN_);
302
303 /* Interrupt on every received packet */
304 SMC_SET_FIFO_RSA(lp, 0x01);
305 SMC_SET_FIFO_RSL(lp, 0x00);
306
307 /* now, enable interrupts */
308 mask = INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_ | INT_EN_RSFL_EN_ |
309 INT_EN_GPT_INT_EN_ | INT_EN_RXDFH_INT_EN_ | INT_EN_RXE_EN_ |
310 INT_EN_PHY_INT_EN_;
311 if (IS_REV_A(lp->revision))
312 mask|=INT_EN_RDFL_EN_;
313 else {
314 mask|=INT_EN_RDFO_EN_;
315 }
316 SMC_ENABLE_INT(lp, mask);
317
318 spin_unlock_irqrestore(&lp->lock, flags);
319 }
320
321 /*
322 * this puts the device in an inactive state
323 */
324 static void smc911x_shutdown(struct net_device *dev)
325 {
326 struct smc911x_local *lp = netdev_priv(dev);
327 unsigned cr;
328 unsigned long flags;
329
330 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", CARDNAME, __func__);
331
332 /* Disable IRQ's */
333 SMC_SET_INT_EN(lp, 0);
334
335 /* Turn of Rx and TX */
336 spin_lock_irqsave(&lp->lock, flags);
337 SMC_GET_MAC_CR(lp, cr);
338 cr &= ~(MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
339 SMC_SET_MAC_CR(lp, cr);
340 SMC_SET_TX_CFG(lp, TX_CFG_STOP_TX_);
341 spin_unlock_irqrestore(&lp->lock, flags);
342 }
343
344 static inline void smc911x_drop_pkt(struct net_device *dev)
345 {
346 struct smc911x_local *lp = netdev_priv(dev);
347 unsigned int fifo_count, timeout, reg;
348
349 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, "%s: --> %s\n", CARDNAME, __func__);
350 fifo_count = SMC_GET_RX_FIFO_INF(lp) & 0xFFFF;
351 if (fifo_count <= 4) {
352 /* Manually dump the packet data */
353 while (fifo_count--)
354 SMC_GET_RX_FIFO(lp);
355 } else {
356 /* Fast forward through the bad packet */
357 SMC_SET_RX_DP_CTRL(lp, RX_DP_CTRL_FFWD_BUSY_);
358 timeout=50;
359 do {
360 udelay(10);
361 reg = SMC_GET_RX_DP_CTRL(lp) & RX_DP_CTRL_FFWD_BUSY_;
362 } while (--timeout && reg);
363 if (timeout == 0) {
364 PRINTK("%s: timeout waiting for RX fast forward\n", dev->name);
365 }
366 }
367 }
368
369 /*
370 * This is the procedure to handle the receipt of a packet.
371 * It should be called after checking for packet presence in
372 * the RX status FIFO. It must be called with the spin lock
373 * already held.
374 */
375 static inline void smc911x_rcv(struct net_device *dev)
376 {
377 struct smc911x_local *lp = netdev_priv(dev);
378 unsigned int pkt_len, status;
379 struct sk_buff *skb;
380 unsigned char *data;
381
382 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, "%s: --> %s\n",
383 dev->name, __func__);
384 status = SMC_GET_RX_STS_FIFO(lp);
385 DBG(SMC_DEBUG_RX, "%s: Rx pkt len %d status 0x%08x\n",
386 dev->name, (status & 0x3fff0000) >> 16, status & 0xc000ffff);
387 pkt_len = (status & RX_STS_PKT_LEN_) >> 16;
388 if (status & RX_STS_ES_) {
389 /* Deal with a bad packet */
390 dev->stats.rx_errors++;
391 if (status & RX_STS_CRC_ERR_)
392 dev->stats.rx_crc_errors++;
393 else {
394 if (status & RX_STS_LEN_ERR_)
395 dev->stats.rx_length_errors++;
396 if (status & RX_STS_MCAST_)
397 dev->stats.multicast++;
398 }
399 /* Remove the bad packet data from the RX FIFO */
400 smc911x_drop_pkt(dev);
401 } else {
402 /* Receive a valid packet */
403 /* Alloc a buffer with extra room for DMA alignment */
404 skb=dev_alloc_skb(pkt_len+32);
405 if (unlikely(skb == NULL)) {
406 PRINTK( "%s: Low memory, rcvd packet dropped.\n",
407 dev->name);
408 dev->stats.rx_dropped++;
409 smc911x_drop_pkt(dev);
410 return;
411 }
412 /* Align IP header to 32 bits
413 * Note that the device is configured to add a 2
414 * byte padding to the packet start, so we really
415 * want to write to the orignal data pointer */
416 data = skb->data;
417 skb_reserve(skb, 2);
418 skb_put(skb,pkt_len-4);
419 #ifdef SMC_USE_DMA
420 {
421 unsigned int fifo;
422 /* Lower the FIFO threshold if possible */
423 fifo = SMC_GET_FIFO_INT(lp);
424 if (fifo & 0xFF) fifo--;
425 DBG(SMC_DEBUG_RX, "%s: Setting RX stat FIFO threshold to %d\n",
426 dev->name, fifo & 0xff);
427 SMC_SET_FIFO_INT(lp, fifo);
428 /* Setup RX DMA */
429 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN16_ | ((2<<8) & RX_CFG_RXDOFF_));
430 lp->rxdma_active = 1;
431 lp->current_rx_skb = skb;
432 SMC_PULL_DATA(lp, data, (pkt_len+2+15) & ~15);
433 /* Packet processing deferred to DMA RX interrupt */
434 }
435 #else
436 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN4_ | ((2<<8) & RX_CFG_RXDOFF_));
437 SMC_PULL_DATA(lp, data, pkt_len+2+3);
438
439 DBG(SMC_DEBUG_PKTS, "%s: Received packet\n", dev->name);
440 PRINT_PKT(data, ((pkt_len - 4) <= 64) ? pkt_len - 4 : 64);
441 skb->protocol = eth_type_trans(skb, dev);
442 netif_rx(skb);
443 dev->stats.rx_packets++;
444 dev->stats.rx_bytes += pkt_len-4;
445 #endif
446 }
447 }
448
449 /*
450 * This is called to actually send a packet to the chip.
451 */
452 static void smc911x_hardware_send_pkt(struct net_device *dev)
453 {
454 struct smc911x_local *lp = netdev_priv(dev);
455 struct sk_buff *skb;
456 unsigned int cmdA, cmdB, len;
457 unsigned char *buf;
458
459 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n", dev->name, __func__);
460 BUG_ON(lp->pending_tx_skb == NULL);
461
462 skb = lp->pending_tx_skb;
463 lp->pending_tx_skb = NULL;
464
465 /* cmdA {25:24] data alignment [20:16] start offset [10:0] buffer length */
466 /* cmdB {31:16] pkt tag [10:0] length */
467 #ifdef SMC_USE_DMA
468 /* 16 byte buffer alignment mode */
469 buf = (char*)((u32)(skb->data) & ~0xF);
470 len = (skb->len + 0xF + ((u32)skb->data & 0xF)) & ~0xF;
471 cmdA = (1<<24) | (((u32)skb->data & 0xF)<<16) |
472 TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
473 skb->len;
474 #else
475 buf = (char*)((u32)skb->data & ~0x3);
476 len = (skb->len + 3 + ((u32)skb->data & 3)) & ~0x3;
477 cmdA = (((u32)skb->data & 0x3) << 16) |
478 TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
479 skb->len;
480 #endif
481 /* tag is packet length so we can use this in stats update later */
482 cmdB = (skb->len << 16) | (skb->len & 0x7FF);
483
484 DBG(SMC_DEBUG_TX, "%s: TX PKT LENGTH 0x%04x (%d) BUF 0x%p CMDA 0x%08x CMDB 0x%08x\n",
485 dev->name, len, len, buf, cmdA, cmdB);
486 SMC_SET_TX_FIFO(lp, cmdA);
487 SMC_SET_TX_FIFO(lp, cmdB);
488
489 DBG(SMC_DEBUG_PKTS, "%s: Transmitted packet\n", dev->name);
490 PRINT_PKT(buf, len <= 64 ? len : 64);
491
492 /* Send pkt via PIO or DMA */
493 #ifdef SMC_USE_DMA
494 lp->current_tx_skb = skb;
495 SMC_PUSH_DATA(lp, buf, len);
496 /* DMA complete IRQ will free buffer and set jiffies */
497 #else
498 SMC_PUSH_DATA(lp, buf, len);
499 dev->trans_start = jiffies;
500 dev_kfree_skb_irq(skb);
501 #endif
502 if (!lp->tx_throttle) {
503 netif_wake_queue(dev);
504 }
505 SMC_ENABLE_INT(lp, INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_);
506 }
507
508 /*
509 * Since I am not sure if I will have enough room in the chip's ram
510 * to store the packet, I call this routine which either sends it
511 * now, or set the card to generates an interrupt when ready
512 * for the packet.
513 */
514 static int smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
515 {
516 struct smc911x_local *lp = netdev_priv(dev);
517 unsigned int free;
518 unsigned long flags;
519
520 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n",
521 dev->name, __func__);
522
523 spin_lock_irqsave(&lp->lock, flags);
524
525 BUG_ON(lp->pending_tx_skb != NULL);
526
527 free = SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TDFREE_;
528 DBG(SMC_DEBUG_TX, "%s: TX free space %d\n", dev->name, free);
529
530 /* Turn off the flow when running out of space in FIFO */
531 if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
532 DBG(SMC_DEBUG_TX, "%s: Disabling data flow due to low FIFO space (%d)\n",
533 dev->name, free);
534 /* Reenable when at least 1 packet of size MTU present */
535 SMC_SET_FIFO_TDA(lp, (SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
536 lp->tx_throttle = 1;
537 netif_stop_queue(dev);
538 }
539
540 /* Drop packets when we run out of space in TX FIFO
541 * Account for overhead required for:
542 *
543 * Tx command words 8 bytes
544 * Start offset 15 bytes
545 * End padding 15 bytes
546 */
547 if (unlikely(free < (skb->len + 8 + 15 + 15))) {
548 printk("%s: No Tx free space %d < %d\n",
549 dev->name, free, skb->len);
550 lp->pending_tx_skb = NULL;
551 dev->stats.tx_errors++;
552 dev->stats.tx_dropped++;
553 spin_unlock_irqrestore(&lp->lock, flags);
554 dev_kfree_skb(skb);
555 return NETDEV_TX_OK;
556 }
557
558 #ifdef SMC_USE_DMA
559 {
560 /* If the DMA is already running then defer this packet Tx until
561 * the DMA IRQ starts it
562 */
563 if (lp->txdma_active) {
564 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: Tx DMA running, deferring packet\n", dev->name);
565 lp->pending_tx_skb = skb;
566 netif_stop_queue(dev);
567 spin_unlock_irqrestore(&lp->lock, flags);
568 return NETDEV_TX_OK;
569 } else {
570 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: Activating Tx DMA\n", dev->name);
571 lp->txdma_active = 1;
572 }
573 }
574 #endif
575 lp->pending_tx_skb = skb;
576 smc911x_hardware_send_pkt(dev);
577 spin_unlock_irqrestore(&lp->lock, flags);
578
579 return NETDEV_TX_OK;
580 }
581
582 /*
583 * This handles a TX status interrupt, which is only called when:
584 * - a TX error occurred, or
585 * - TX of a packet completed.
586 */
587 static void smc911x_tx(struct net_device *dev)
588 {
589 struct smc911x_local *lp = netdev_priv(dev);
590 unsigned int tx_status;
591
592 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n",
593 dev->name, __func__);
594
595 /* Collect the TX status */
596 while (((SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
597 DBG(SMC_DEBUG_TX, "%s: Tx stat FIFO used 0x%04x\n",
598 dev->name,
599 (SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16);
600 tx_status = SMC_GET_TX_STS_FIFO(lp);
601 dev->stats.tx_packets++;
602 dev->stats.tx_bytes+=tx_status>>16;
603 DBG(SMC_DEBUG_TX, "%s: Tx FIFO tag 0x%04x status 0x%04x\n",
604 dev->name, (tx_status & 0xffff0000) >> 16,
605 tx_status & 0x0000ffff);
606 /* count Tx errors, but ignore lost carrier errors when in
607 * full-duplex mode */
608 if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
609 !(tx_status & 0x00000306))) {
610 dev->stats.tx_errors++;
611 }
612 if (tx_status & TX_STS_MANY_COLL_) {
613 dev->stats.collisions+=16;
614 dev->stats.tx_aborted_errors++;
615 } else {
616 dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
617 }
618 /* carrier error only has meaning for half-duplex communication */
619 if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
620 !lp->ctl_rfduplx) {
621 dev->stats.tx_carrier_errors++;
622 }
623 if (tx_status & TX_STS_LATE_COLL_) {
624 dev->stats.collisions++;
625 dev->stats.tx_aborted_errors++;
626 }
627 }
628 }
629
630
631 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
632 /*
633 * Reads a register from the MII Management serial interface
634 */
635
636 static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
637 {
638 struct smc911x_local *lp = netdev_priv(dev);
639 unsigned int phydata;
640
641 SMC_GET_MII(lp, phyreg, phyaddr, phydata);
642
643 DBG(SMC_DEBUG_MISC, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
644 __func__, phyaddr, phyreg, phydata);
645 return phydata;
646 }
647
648
649 /*
650 * Writes a register to the MII Management serial interface
651 */
652 static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
653 int phydata)
654 {
655 struct smc911x_local *lp = netdev_priv(dev);
656
657 DBG(SMC_DEBUG_MISC, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
658 __func__, phyaddr, phyreg, phydata);
659
660 SMC_SET_MII(lp, phyreg, phyaddr, phydata);
661 }
662
663 /*
664 * Finds and reports the PHY address (115 and 117 have external
665 * PHY interface 118 has internal only
666 */
667 static void smc911x_phy_detect(struct net_device *dev)
668 {
669 struct smc911x_local *lp = netdev_priv(dev);
670 int phyaddr;
671 unsigned int cfg, id1, id2;
672
673 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
674
675 lp->phy_type = 0;
676
677 /*
678 * Scan all 32 PHY addresses if necessary, starting at
679 * PHY#1 to PHY#31, and then PHY#0 last.
680 */
681 switch(lp->version) {
682 case CHIP_9115:
683 case CHIP_9117:
684 case CHIP_9215:
685 case CHIP_9217:
686 cfg = SMC_GET_HW_CFG(lp);
687 if (cfg & HW_CFG_EXT_PHY_DET_) {
688 cfg &= ~HW_CFG_PHY_CLK_SEL_;
689 cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
690 SMC_SET_HW_CFG(lp, cfg);
691 udelay(10); /* Wait for clocks to stop */
692
693 cfg |= HW_CFG_EXT_PHY_EN_;
694 SMC_SET_HW_CFG(lp, cfg);
695 udelay(10); /* Wait for clocks to stop */
696
697 cfg &= ~HW_CFG_PHY_CLK_SEL_;
698 cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
699 SMC_SET_HW_CFG(lp, cfg);
700 udelay(10); /* Wait for clocks to stop */
701
702 cfg |= HW_CFG_SMI_SEL_;
703 SMC_SET_HW_CFG(lp, cfg);
704
705 for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
706
707 /* Read the PHY identifiers */
708 SMC_GET_PHY_ID1(lp, phyaddr & 31, id1);
709 SMC_GET_PHY_ID2(lp, phyaddr & 31, id2);
710
711 /* Make sure it is a valid identifier */
712 if (id1 != 0x0000 && id1 != 0xffff &&
713 id1 != 0x8000 && id2 != 0x0000 &&
714 id2 != 0xffff && id2 != 0x8000) {
715 /* Save the PHY's address */
716 lp->mii.phy_id = phyaddr & 31;
717 lp->phy_type = id1 << 16 | id2;
718 break;
719 }
720 }
721 if (phyaddr < 32)
722 /* Found an external PHY */
723 break;
724 }
725 default:
726 /* Internal media only */
727 SMC_GET_PHY_ID1(lp, 1, id1);
728 SMC_GET_PHY_ID2(lp, 1, id2);
729 /* Save the PHY's address */
730 lp->mii.phy_id = 1;
731 lp->phy_type = id1 << 16 | id2;
732 }
733
734 DBG(SMC_DEBUG_MISC, "%s: phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%d\n",
735 dev->name, id1, id2, lp->mii.phy_id);
736 }
737
738 /*
739 * Sets the PHY to a configuration as determined by the user.
740 * Called with spin_lock held.
741 */
742 static int smc911x_phy_fixed(struct net_device *dev)
743 {
744 struct smc911x_local *lp = netdev_priv(dev);
745 int phyaddr = lp->mii.phy_id;
746 int bmcr;
747
748 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
749
750 /* Enter Link Disable state */
751 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
752 bmcr |= BMCR_PDOWN;
753 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
754
755 /*
756 * Set our fixed capabilities
757 * Disable auto-negotiation
758 */
759 bmcr &= ~BMCR_ANENABLE;
760 if (lp->ctl_rfduplx)
761 bmcr |= BMCR_FULLDPLX;
762
763 if (lp->ctl_rspeed == 100)
764 bmcr |= BMCR_SPEED100;
765
766 /* Write our capabilities to the phy control register */
767 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
768
769 /* Re-Configure the Receive/Phy Control register */
770 bmcr &= ~BMCR_PDOWN;
771 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
772
773 return 1;
774 }
775
776 /*
777 * smc911x_phy_reset - reset the phy
778 * @dev: net device
779 * @phy: phy address
780 *
781 * Issue a software reset for the specified PHY and
782 * wait up to 100ms for the reset to complete. We should
783 * not access the PHY for 50ms after issuing the reset.
784 *
785 * The time to wait appears to be dependent on the PHY.
786 *
787 */
788 static int smc911x_phy_reset(struct net_device *dev, int phy)
789 {
790 struct smc911x_local *lp = netdev_priv(dev);
791 int timeout;
792 unsigned long flags;
793 unsigned int reg;
794
795 DBG(SMC_DEBUG_FUNC, "%s: --> %s()\n", dev->name, __func__);
796
797 spin_lock_irqsave(&lp->lock, flags);
798 reg = SMC_GET_PMT_CTRL(lp);
799 reg &= ~0xfffff030;
800 reg |= PMT_CTRL_PHY_RST_;
801 SMC_SET_PMT_CTRL(lp, reg);
802 spin_unlock_irqrestore(&lp->lock, flags);
803 for (timeout = 2; timeout; timeout--) {
804 msleep(50);
805 spin_lock_irqsave(&lp->lock, flags);
806 reg = SMC_GET_PMT_CTRL(lp);
807 spin_unlock_irqrestore(&lp->lock, flags);
808 if (!(reg & PMT_CTRL_PHY_RST_)) {
809 /* extra delay required because the phy may
810 * not be completed with its reset
811 * when PHY_BCR_RESET_ is cleared. 256us
812 * should suffice, but use 500us to be safe
813 */
814 udelay(500);
815 break;
816 }
817 }
818
819 return reg & PMT_CTRL_PHY_RST_;
820 }
821
822 /*
823 * smc911x_phy_powerdown - powerdown phy
824 * @dev: net device
825 * @phy: phy address
826 *
827 * Power down the specified PHY
828 */
829 static void smc911x_phy_powerdown(struct net_device *dev, int phy)
830 {
831 struct smc911x_local *lp = netdev_priv(dev);
832 unsigned int bmcr;
833
834 /* Enter Link Disable state */
835 SMC_GET_PHY_BMCR(lp, phy, bmcr);
836 bmcr |= BMCR_PDOWN;
837 SMC_SET_PHY_BMCR(lp, phy, bmcr);
838 }
839
840 /*
841 * smc911x_phy_check_media - check the media status and adjust BMCR
842 * @dev: net device
843 * @init: set true for initialisation
844 *
845 * Select duplex mode depending on negotiation state. This
846 * also updates our carrier state.
847 */
848 static void smc911x_phy_check_media(struct net_device *dev, int init)
849 {
850 struct smc911x_local *lp = netdev_priv(dev);
851 int phyaddr = lp->mii.phy_id;
852 unsigned int bmcr, cr;
853
854 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
855
856 if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
857 /* duplex state has changed */
858 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
859 SMC_GET_MAC_CR(lp, cr);
860 if (lp->mii.full_duplex) {
861 DBG(SMC_DEBUG_MISC, "%s: Configuring for full-duplex mode\n", dev->name);
862 bmcr |= BMCR_FULLDPLX;
863 cr |= MAC_CR_RCVOWN_;
864 } else {
865 DBG(SMC_DEBUG_MISC, "%s: Configuring for half-duplex mode\n", dev->name);
866 bmcr &= ~BMCR_FULLDPLX;
867 cr &= ~MAC_CR_RCVOWN_;
868 }
869 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
870 SMC_SET_MAC_CR(lp, cr);
871 }
872 }
873
874 /*
875 * Configures the specified PHY through the MII management interface
876 * using Autonegotiation.
877 * Calls smc911x_phy_fixed() if the user has requested a certain config.
878 * If RPC ANEG bit is set, the media selection is dependent purely on
879 * the selection by the MII (either in the MII BMCR reg or the result
880 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
881 * is controlled by the RPC SPEED and RPC DPLX bits.
882 */
883 static void smc911x_phy_configure(struct work_struct *work)
884 {
885 struct smc911x_local *lp = container_of(work, struct smc911x_local,
886 phy_configure);
887 struct net_device *dev = lp->netdev;
888 int phyaddr = lp->mii.phy_id;
889 int my_phy_caps; /* My PHY capabilities */
890 int my_ad_caps; /* My Advertised capabilities */
891 int status;
892 unsigned long flags;
893
894 DBG(SMC_DEBUG_FUNC, "%s: --> %s()\n", dev->name, __func__);
895
896 /*
897 * We should not be called if phy_type is zero.
898 */
899 if (lp->phy_type == 0)
900 return;
901
902 if (smc911x_phy_reset(dev, phyaddr)) {
903 printk("%s: PHY reset timed out\n", dev->name);
904 return;
905 }
906 spin_lock_irqsave(&lp->lock, flags);
907
908 /*
909 * Enable PHY Interrupts (for register 18)
910 * Interrupts listed here are enabled
911 */
912 SMC_SET_PHY_INT_MASK(lp, phyaddr, PHY_INT_MASK_ENERGY_ON_ |
913 PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
914 PHY_INT_MASK_LINK_DOWN_);
915
916 /* If the user requested no auto neg, then go set his request */
917 if (lp->mii.force_media) {
918 smc911x_phy_fixed(dev);
919 goto smc911x_phy_configure_exit;
920 }
921
922 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
923 SMC_GET_PHY_BMSR(lp, phyaddr, my_phy_caps);
924 if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
925 printk(KERN_INFO "Auto negotiation NOT supported\n");
926 smc911x_phy_fixed(dev);
927 goto smc911x_phy_configure_exit;
928 }
929
930 /* CSMA capable w/ both pauses */
931 my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
932
933 if (my_phy_caps & BMSR_100BASE4)
934 my_ad_caps |= ADVERTISE_100BASE4;
935 if (my_phy_caps & BMSR_100FULL)
936 my_ad_caps |= ADVERTISE_100FULL;
937 if (my_phy_caps & BMSR_100HALF)
938 my_ad_caps |= ADVERTISE_100HALF;
939 if (my_phy_caps & BMSR_10FULL)
940 my_ad_caps |= ADVERTISE_10FULL;
941 if (my_phy_caps & BMSR_10HALF)
942 my_ad_caps |= ADVERTISE_10HALF;
943
944 /* Disable capabilities not selected by our user */
945 if (lp->ctl_rspeed != 100)
946 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
947
948 if (!lp->ctl_rfduplx)
949 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
950
951 /* Update our Auto-Neg Advertisement Register */
952 SMC_SET_PHY_MII_ADV(lp, phyaddr, my_ad_caps);
953 lp->mii.advertising = my_ad_caps;
954
955 /*
956 * Read the register back. Without this, it appears that when
957 * auto-negotiation is restarted, sometimes it isn't ready and
958 * the link does not come up.
959 */
960 udelay(10);
961 SMC_GET_PHY_MII_ADV(lp, phyaddr, status);
962
963 DBG(SMC_DEBUG_MISC, "%s: phy caps=0x%04x\n", dev->name, my_phy_caps);
964 DBG(SMC_DEBUG_MISC, "%s: phy advertised caps=0x%04x\n", dev->name, my_ad_caps);
965
966 /* Restart auto-negotiation process in order to advertise my caps */
967 SMC_SET_PHY_BMCR(lp, phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
968
969 smc911x_phy_check_media(dev, 1);
970
971 smc911x_phy_configure_exit:
972 spin_unlock_irqrestore(&lp->lock, flags);
973 }
974
975 /*
976 * smc911x_phy_interrupt
977 *
978 * Purpose: Handle interrupts relating to PHY register 18. This is
979 * called from the "hard" interrupt handler under our private spinlock.
980 */
981 static void smc911x_phy_interrupt(struct net_device *dev)
982 {
983 struct smc911x_local *lp = netdev_priv(dev);
984 int phyaddr = lp->mii.phy_id;
985 int status;
986
987 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
988
989 if (lp->phy_type == 0)
990 return;
991
992 smc911x_phy_check_media(dev, 0);
993 /* read to clear status bits */
994 SMC_GET_PHY_INT_SRC(lp, phyaddr,status);
995 DBG(SMC_DEBUG_MISC, "%s: PHY interrupt status 0x%04x\n",
996 dev->name, status & 0xffff);
997 DBG(SMC_DEBUG_MISC, "%s: AFC_CFG 0x%08x\n",
998 dev->name, SMC_GET_AFC_CFG(lp));
999 }
1000
1001 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1002
1003 /*
1004 * This is the main routine of the driver, to handle the device when
1005 * it needs some attention.
1006 */
1007 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1008 {
1009 struct net_device *dev = dev_id;
1010 struct smc911x_local *lp = netdev_priv(dev);
1011 unsigned int status, mask, timeout;
1012 unsigned int rx_overrun=0, cr, pkts;
1013 unsigned long flags;
1014
1015 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
1016
1017 spin_lock_irqsave(&lp->lock, flags);
1018
1019 /* Spurious interrupt check */
1020 if ((SMC_GET_IRQ_CFG(lp) & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1021 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1022 spin_unlock_irqrestore(&lp->lock, flags);
1023 return IRQ_NONE;
1024 }
1025
1026 mask = SMC_GET_INT_EN(lp);
1027 SMC_SET_INT_EN(lp, 0);
1028
1029 /* set a timeout value, so I don't stay here forever */
1030 timeout = 8;
1031
1032
1033 do {
1034 status = SMC_GET_INT(lp);
1035
1036 DBG(SMC_DEBUG_MISC, "%s: INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1037 dev->name, status, mask, status & ~mask);
1038
1039 status &= mask;
1040 if (!status)
1041 break;
1042
1043 /* Handle SW interrupt condition */
1044 if (status & INT_STS_SW_INT_) {
1045 SMC_ACK_INT(lp, INT_STS_SW_INT_);
1046 mask &= ~INT_EN_SW_INT_EN_;
1047 }
1048 /* Handle various error conditions */
1049 if (status & INT_STS_RXE_) {
1050 SMC_ACK_INT(lp, INT_STS_RXE_);
1051 dev->stats.rx_errors++;
1052 }
1053 if (status & INT_STS_RXDFH_INT_) {
1054 SMC_ACK_INT(lp, INT_STS_RXDFH_INT_);
1055 dev->stats.rx_dropped+=SMC_GET_RX_DROP(lp);
1056 }
1057 /* Undocumented interrupt-what is the right thing to do here? */
1058 if (status & INT_STS_RXDF_INT_) {
1059 SMC_ACK_INT(lp, INT_STS_RXDF_INT_);
1060 }
1061
1062 /* Rx Data FIFO exceeds set level */
1063 if (status & INT_STS_RDFL_) {
1064 if (IS_REV_A(lp->revision)) {
1065 rx_overrun=1;
1066 SMC_GET_MAC_CR(lp, cr);
1067 cr &= ~MAC_CR_RXEN_;
1068 SMC_SET_MAC_CR(lp, cr);
1069 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1070 dev->stats.rx_errors++;
1071 dev->stats.rx_fifo_errors++;
1072 }
1073 SMC_ACK_INT(lp, INT_STS_RDFL_);
1074 }
1075 if (status & INT_STS_RDFO_) {
1076 if (!IS_REV_A(lp->revision)) {
1077 SMC_GET_MAC_CR(lp, cr);
1078 cr &= ~MAC_CR_RXEN_;
1079 SMC_SET_MAC_CR(lp, cr);
1080 rx_overrun=1;
1081 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1082 dev->stats.rx_errors++;
1083 dev->stats.rx_fifo_errors++;
1084 }
1085 SMC_ACK_INT(lp, INT_STS_RDFO_);
1086 }
1087 /* Handle receive condition */
1088 if ((status & INT_STS_RSFL_) || rx_overrun) {
1089 unsigned int fifo;
1090 DBG(SMC_DEBUG_RX, "%s: RX irq\n", dev->name);
1091 fifo = SMC_GET_RX_FIFO_INF(lp);
1092 pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1093 DBG(SMC_DEBUG_RX, "%s: Rx FIFO pkts %d, bytes %d\n",
1094 dev->name, pkts, fifo & 0xFFFF );
1095 if (pkts != 0) {
1096 #ifdef SMC_USE_DMA
1097 unsigned int fifo;
1098 if (lp->rxdma_active){
1099 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1100 "%s: RX DMA active\n", dev->name);
1101 /* The DMA is already running so up the IRQ threshold */
1102 fifo = SMC_GET_FIFO_INT(lp) & ~0xFF;
1103 fifo |= pkts & 0xFF;
1104 DBG(SMC_DEBUG_RX,
1105 "%s: Setting RX stat FIFO threshold to %d\n",
1106 dev->name, fifo & 0xff);
1107 SMC_SET_FIFO_INT(lp, fifo);
1108 } else
1109 #endif
1110 smc911x_rcv(dev);
1111 }
1112 SMC_ACK_INT(lp, INT_STS_RSFL_);
1113 }
1114 /* Handle transmit FIFO available */
1115 if (status & INT_STS_TDFA_) {
1116 DBG(SMC_DEBUG_TX, "%s: TX data FIFO space available irq\n", dev->name);
1117 SMC_SET_FIFO_TDA(lp, 0xFF);
1118 lp->tx_throttle = 0;
1119 #ifdef SMC_USE_DMA
1120 if (!lp->txdma_active)
1121 #endif
1122 netif_wake_queue(dev);
1123 SMC_ACK_INT(lp, INT_STS_TDFA_);
1124 }
1125 /* Handle transmit done condition */
1126 #if 1
1127 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1128 DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC,
1129 "%s: Tx stat FIFO limit (%d) /GPT irq\n",
1130 dev->name, (SMC_GET_FIFO_INT(lp) & 0x00ff0000) >> 16);
1131 smc911x_tx(dev);
1132 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1133 SMC_ACK_INT(lp, INT_STS_TSFL_);
1134 SMC_ACK_INT(lp, INT_STS_TSFL_ | INT_STS_GPT_INT_);
1135 }
1136 #else
1137 if (status & INT_STS_TSFL_) {
1138 DBG(SMC_DEBUG_TX, "%s: TX status FIFO limit (%d) irq\n", dev->name, );
1139 smc911x_tx(dev);
1140 SMC_ACK_INT(lp, INT_STS_TSFL_);
1141 }
1142
1143 if (status & INT_STS_GPT_INT_) {
1144 DBG(SMC_DEBUG_RX, "%s: IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1145 dev->name,
1146 SMC_GET_IRQ_CFG(lp),
1147 SMC_GET_FIFO_INT(lp),
1148 SMC_GET_RX_CFG(lp));
1149 DBG(SMC_DEBUG_RX, "%s: Rx Stat FIFO Used 0x%02x "
1150 "Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1151 dev->name,
1152 (SMC_GET_RX_FIFO_INF(lp) & 0x00ff0000) >> 16,
1153 SMC_GET_RX_FIFO_INF(lp) & 0xffff,
1154 SMC_GET_RX_STS_FIFO_PEEK(lp));
1155 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1156 SMC_ACK_INT(lp, INT_STS_GPT_INT_);
1157 }
1158 #endif
1159
1160 /* Handle PHY interrupt condition */
1161 if (status & INT_STS_PHY_INT_) {
1162 DBG(SMC_DEBUG_MISC, "%s: PHY irq\n", dev->name);
1163 smc911x_phy_interrupt(dev);
1164 SMC_ACK_INT(lp, INT_STS_PHY_INT_);
1165 }
1166 } while (--timeout);
1167
1168 /* restore mask state */
1169 SMC_SET_INT_EN(lp, mask);
1170
1171 DBG(SMC_DEBUG_MISC, "%s: Interrupt done (%d loops)\n",
1172 dev->name, 8-timeout);
1173
1174 spin_unlock_irqrestore(&lp->lock, flags);
1175
1176 return IRQ_HANDLED;
1177 }
1178
1179 #ifdef SMC_USE_DMA
1180 static void
1181 smc911x_tx_dma_irq(int dma, void *data)
1182 {
1183 struct net_device *dev = (struct net_device *)data;
1184 struct smc911x_local *lp = netdev_priv(dev);
1185 struct sk_buff *skb = lp->current_tx_skb;
1186 unsigned long flags;
1187
1188 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
1189
1190 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: TX DMA irq handler\n", dev->name);
1191 /* Clear the DMA interrupt sources */
1192 SMC_DMA_ACK_IRQ(dev, dma);
1193 BUG_ON(skb == NULL);
1194 dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1195 dev->trans_start = jiffies;
1196 dev_kfree_skb_irq(skb);
1197 lp->current_tx_skb = NULL;
1198 if (lp->pending_tx_skb != NULL)
1199 smc911x_hardware_send_pkt(dev);
1200 else {
1201 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1202 "%s: No pending Tx packets. DMA disabled\n", dev->name);
1203 spin_lock_irqsave(&lp->lock, flags);
1204 lp->txdma_active = 0;
1205 if (!lp->tx_throttle) {
1206 netif_wake_queue(dev);
1207 }
1208 spin_unlock_irqrestore(&lp->lock, flags);
1209 }
1210
1211 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1212 "%s: TX DMA irq completed\n", dev->name);
1213 }
1214 static void
1215 smc911x_rx_dma_irq(int dma, void *data)
1216 {
1217 struct net_device *dev = (struct net_device *)data;
1218 unsigned long ioaddr = dev->base_addr;
1219 struct smc911x_local *lp = netdev_priv(dev);
1220 struct sk_buff *skb = lp->current_rx_skb;
1221 unsigned long flags;
1222 unsigned int pkts;
1223
1224 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
1225 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, "%s: RX DMA irq handler\n", dev->name);
1226 /* Clear the DMA interrupt sources */
1227 SMC_DMA_ACK_IRQ(dev, dma);
1228 dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1229 BUG_ON(skb == NULL);
1230 lp->current_rx_skb = NULL;
1231 PRINT_PKT(skb->data, skb->len);
1232 skb->protocol = eth_type_trans(skb, dev);
1233 dev->stats.rx_packets++;
1234 dev->stats.rx_bytes += skb->len;
1235 netif_rx(skb);
1236
1237 spin_lock_irqsave(&lp->lock, flags);
1238 pkts = (SMC_GET_RX_FIFO_INF(lp) & RX_FIFO_INF_RXSUSED_) >> 16;
1239 if (pkts != 0) {
1240 smc911x_rcv(dev);
1241 }else {
1242 lp->rxdma_active = 0;
1243 }
1244 spin_unlock_irqrestore(&lp->lock, flags);
1245 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1246 "%s: RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1247 dev->name, pkts);
1248 }
1249 #endif /* SMC_USE_DMA */
1250
1251 #ifdef CONFIG_NET_POLL_CONTROLLER
1252 /*
1253 * Polling receive - used by netconsole and other diagnostic tools
1254 * to allow network i/o with interrupts disabled.
1255 */
1256 static void smc911x_poll_controller(struct net_device *dev)
1257 {
1258 disable_irq(dev->irq);
1259 smc911x_interrupt(dev->irq, dev);
1260 enable_irq(dev->irq);
1261 }
1262 #endif
1263
1264 /* Our watchdog timed out. Called by the networking layer */
1265 static void smc911x_timeout(struct net_device *dev)
1266 {
1267 struct smc911x_local *lp = netdev_priv(dev);
1268 int status, mask;
1269 unsigned long flags;
1270
1271 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
1272
1273 spin_lock_irqsave(&lp->lock, flags);
1274 status = SMC_GET_INT(lp);
1275 mask = SMC_GET_INT_EN(lp);
1276 spin_unlock_irqrestore(&lp->lock, flags);
1277 DBG(SMC_DEBUG_MISC, "%s: INT 0x%02x MASK 0x%02x\n",
1278 dev->name, status, mask);
1279
1280 /* Dump the current TX FIFO contents and restart */
1281 mask = SMC_GET_TX_CFG(lp);
1282 SMC_SET_TX_CFG(lp, mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1283 /*
1284 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1285 * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1286 * which calls schedule(). Hence we use a work queue.
1287 */
1288 if (lp->phy_type != 0)
1289 schedule_work(&lp->phy_configure);
1290
1291 /* We can accept TX packets again */
1292 dev->trans_start = jiffies; /* prevent tx timeout */
1293 netif_wake_queue(dev);
1294 }
1295
1296 /*
1297 * This routine will, depending on the values passed to it,
1298 * either make it accept multicast packets, go into
1299 * promiscuous mode (for TCPDUMP and cousins) or accept
1300 * a select set of multicast packets
1301 */
1302 static void smc911x_set_multicast_list(struct net_device *dev)
1303 {
1304 struct smc911x_local *lp = netdev_priv(dev);
1305 unsigned int multicast_table[2];
1306 unsigned int mcr, update_multicast = 0;
1307 unsigned long flags;
1308
1309 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
1310
1311 spin_lock_irqsave(&lp->lock, flags);
1312 SMC_GET_MAC_CR(lp, mcr);
1313 spin_unlock_irqrestore(&lp->lock, flags);
1314
1315 if (dev->flags & IFF_PROMISC) {
1316
1317 DBG(SMC_DEBUG_MISC, "%s: RCR_PRMS\n", dev->name);
1318 mcr |= MAC_CR_PRMS_;
1319 }
1320 /*
1321 * Here, I am setting this to accept all multicast packets.
1322 * I don't need to zero the multicast table, because the flag is
1323 * checked before the table is
1324 */
1325 else if (dev->flags & IFF_ALLMULTI || netdev_mc_count(dev) > 16) {
1326 DBG(SMC_DEBUG_MISC, "%s: RCR_ALMUL\n", dev->name);
1327 mcr |= MAC_CR_MCPAS_;
1328 }
1329
1330 /*
1331 * This sets the internal hardware table to filter out unwanted
1332 * multicast packets before they take up memory.
1333 *
1334 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1335 * address are the offset into the table. If that bit is 1, then the
1336 * multicast packet is accepted. Otherwise, it's dropped silently.
1337 *
1338 * To use the 6 bits as an offset into the table, the high 1 bit is
1339 * the number of the 32 bit register, while the low 5 bits are the bit
1340 * within that register.
1341 */
1342 else if (!netdev_mc_empty(dev)) {
1343 struct netdev_hw_addr *ha;
1344
1345 /* Set the Hash perfec mode */
1346 mcr |= MAC_CR_HPFILT_;
1347
1348 /* start with a table of all zeros: reject all */
1349 memset(multicast_table, 0, sizeof(multicast_table));
1350
1351 netdev_for_each_mc_addr(ha, dev) {
1352 u32 position;
1353
1354 /* upper 6 bits are used as hash index */
1355 position = ether_crc(ETH_ALEN, ha->addr)>>26;
1356
1357 multicast_table[position>>5] |= 1 << (position&0x1f);
1358 }
1359
1360 /* be sure I get rid of flags I might have set */
1361 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1362
1363 /* now, the table can be loaded into the chipset */
1364 update_multicast = 1;
1365 } else {
1366 DBG(SMC_DEBUG_MISC, "%s: ~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n",
1367 dev->name);
1368 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1369
1370 /*
1371 * since I'm disabling all multicast entirely, I need to
1372 * clear the multicast list
1373 */
1374 memset(multicast_table, 0, sizeof(multicast_table));
1375 update_multicast = 1;
1376 }
1377
1378 spin_lock_irqsave(&lp->lock, flags);
1379 SMC_SET_MAC_CR(lp, mcr);
1380 if (update_multicast) {
1381 DBG(SMC_DEBUG_MISC,
1382 "%s: update mcast hash table 0x%08x 0x%08x\n",
1383 dev->name, multicast_table[0], multicast_table[1]);
1384 SMC_SET_HASHL(lp, multicast_table[0]);
1385 SMC_SET_HASHH(lp, multicast_table[1]);
1386 }
1387 spin_unlock_irqrestore(&lp->lock, flags);
1388 }
1389
1390
1391 /*
1392 * Open and Initialize the board
1393 *
1394 * Set up everything, reset the card, etc..
1395 */
1396 static int
1397 smc911x_open(struct net_device *dev)
1398 {
1399 struct smc911x_local *lp = netdev_priv(dev);
1400
1401 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
1402
1403 /*
1404 * Check that the address is valid. If its not, refuse
1405 * to bring the device up. The user must specify an
1406 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1407 */
1408 if (!is_valid_ether_addr(dev->dev_addr)) {
1409 PRINTK("%s: no valid ethernet hw addr\n", __func__);
1410 return -EINVAL;
1411 }
1412
1413 /* reset the hardware */
1414 smc911x_reset(dev);
1415
1416 /* Configure the PHY, initialize the link state */
1417 smc911x_phy_configure(&lp->phy_configure);
1418
1419 /* Turn on Tx + Rx */
1420 smc911x_enable(dev);
1421
1422 netif_start_queue(dev);
1423
1424 return 0;
1425 }
1426
1427 /*
1428 * smc911x_close
1429 *
1430 * this makes the board clean up everything that it can
1431 * and not talk to the outside world. Caused by
1432 * an 'ifconfig ethX down'
1433 */
1434 static int smc911x_close(struct net_device *dev)
1435 {
1436 struct smc911x_local *lp = netdev_priv(dev);
1437
1438 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
1439
1440 netif_stop_queue(dev);
1441 netif_carrier_off(dev);
1442
1443 /* clear everything */
1444 smc911x_shutdown(dev);
1445
1446 if (lp->phy_type != 0) {
1447 /* We need to ensure that no calls to
1448 * smc911x_phy_configure are pending.
1449 */
1450 cancel_work_sync(&lp->phy_configure);
1451 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1452 }
1453
1454 if (lp->pending_tx_skb) {
1455 dev_kfree_skb(lp->pending_tx_skb);
1456 lp->pending_tx_skb = NULL;
1457 }
1458
1459 return 0;
1460 }
1461
1462 /*
1463 * Ethtool support
1464 */
1465 static int
1466 smc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1467 {
1468 struct smc911x_local *lp = netdev_priv(dev);
1469 int ret, status;
1470 unsigned long flags;
1471
1472 DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __func__);
1473 cmd->maxtxpkt = 1;
1474 cmd->maxrxpkt = 1;
1475
1476 if (lp->phy_type != 0) {
1477 spin_lock_irqsave(&lp->lock, flags);
1478 ret = mii_ethtool_gset(&lp->mii, cmd);
1479 spin_unlock_irqrestore(&lp->lock, flags);
1480 } else {
1481 cmd->supported = SUPPORTED_10baseT_Half |
1482 SUPPORTED_10baseT_Full |
1483 SUPPORTED_TP | SUPPORTED_AUI;
1484
1485 if (lp->ctl_rspeed == 10)
1486 ethtool_cmd_speed_set(cmd, SPEED_10);
1487 else if (lp->ctl_rspeed == 100)
1488 ethtool_cmd_speed_set(cmd, SPEED_100);
1489
1490 cmd->autoneg = AUTONEG_DISABLE;
1491 if (lp->mii.phy_id==1)
1492 cmd->transceiver = XCVR_INTERNAL;
1493 else
1494 cmd->transceiver = XCVR_EXTERNAL;
1495 cmd->port = 0;
1496 SMC_GET_PHY_SPECIAL(lp, lp->mii.phy_id, status);
1497 cmd->duplex =
1498 (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1499 DUPLEX_FULL : DUPLEX_HALF;
1500 ret = 0;
1501 }
1502
1503 return ret;
1504 }
1505
1506 static int
1507 smc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1508 {
1509 struct smc911x_local *lp = netdev_priv(dev);
1510 int ret;
1511 unsigned long flags;
1512
1513 if (lp->phy_type != 0) {
1514 spin_lock_irqsave(&lp->lock, flags);
1515 ret = mii_ethtool_sset(&lp->mii, cmd);
1516 spin_unlock_irqrestore(&lp->lock, flags);
1517 } else {
1518 if (cmd->autoneg != AUTONEG_DISABLE ||
1519 cmd->speed != SPEED_10 ||
1520 (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1521 (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1522 return -EINVAL;
1523
1524 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1525
1526 ret = 0;
1527 }
1528
1529 return ret;
1530 }
1531
1532 static void
1533 smc911x_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1534 {
1535 strncpy(info->driver, CARDNAME, sizeof(info->driver));
1536 strncpy(info->version, version, sizeof(info->version));
1537 strncpy(info->bus_info, dev_name(dev->dev.parent), sizeof(info->bus_info));
1538 }
1539
1540 static int smc911x_ethtool_nwayreset(struct net_device *dev)
1541 {
1542 struct smc911x_local *lp = netdev_priv(dev);
1543 int ret = -EINVAL;
1544 unsigned long flags;
1545
1546 if (lp->phy_type != 0) {
1547 spin_lock_irqsave(&lp->lock, flags);
1548 ret = mii_nway_restart(&lp->mii);
1549 spin_unlock_irqrestore(&lp->lock, flags);
1550 }
1551
1552 return ret;
1553 }
1554
1555 static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1556 {
1557 struct smc911x_local *lp = netdev_priv(dev);
1558 return lp->msg_enable;
1559 }
1560
1561 static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1562 {
1563 struct smc911x_local *lp = netdev_priv(dev);
1564 lp->msg_enable = level;
1565 }
1566
1567 static int smc911x_ethtool_getregslen(struct net_device *dev)
1568 {
1569 /* System regs + MAC regs + PHY regs */
1570 return (((E2P_CMD - ID_REV)/4 + 1) +
1571 (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1572 }
1573
1574 static void smc911x_ethtool_getregs(struct net_device *dev,
1575 struct ethtool_regs* regs, void *buf)
1576 {
1577 struct smc911x_local *lp = netdev_priv(dev);
1578 unsigned long flags;
1579 u32 reg,i,j=0;
1580 u32 *data = (u32*)buf;
1581
1582 regs->version = lp->version;
1583 for(i=ID_REV;i<=E2P_CMD;i+=4) {
1584 data[j++] = SMC_inl(lp, i);
1585 }
1586 for(i=MAC_CR;i<=WUCSR;i++) {
1587 spin_lock_irqsave(&lp->lock, flags);
1588 SMC_GET_MAC_CSR(lp, i, reg);
1589 spin_unlock_irqrestore(&lp->lock, flags);
1590 data[j++] = reg;
1591 }
1592 for(i=0;i<=31;i++) {
1593 spin_lock_irqsave(&lp->lock, flags);
1594 SMC_GET_MII(lp, i, lp->mii.phy_id, reg);
1595 spin_unlock_irqrestore(&lp->lock, flags);
1596 data[j++] = reg & 0xFFFF;
1597 }
1598 }
1599
1600 static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1601 {
1602 struct smc911x_local *lp = netdev_priv(dev);
1603 unsigned int timeout;
1604 int e2p_cmd;
1605
1606 e2p_cmd = SMC_GET_E2P_CMD(lp);
1607 for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1608 if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1609 PRINTK("%s: %s timeout waiting for EEPROM to respond\n",
1610 dev->name, __func__);
1611 return -EFAULT;
1612 }
1613 mdelay(1);
1614 e2p_cmd = SMC_GET_E2P_CMD(lp);
1615 }
1616 if (timeout == 0) {
1617 PRINTK("%s: %s timeout waiting for EEPROM CMD not busy\n",
1618 dev->name, __func__);
1619 return -ETIMEDOUT;
1620 }
1621 return 0;
1622 }
1623
1624 static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1625 int cmd, int addr)
1626 {
1627 struct smc911x_local *lp = netdev_priv(dev);
1628 int ret;
1629
1630 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1631 return ret;
1632 SMC_SET_E2P_CMD(lp, E2P_CMD_EPC_BUSY_ |
1633 ((cmd) & (0x7<<28)) |
1634 ((addr) & 0xFF));
1635 return 0;
1636 }
1637
1638 static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1639 u8 *data)
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 *data = SMC_GET_E2P_DATA(lp);
1647 return 0;
1648 }
1649
1650 static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1651 u8 data)
1652 {
1653 struct smc911x_local *lp = netdev_priv(dev);
1654 int ret;
1655
1656 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1657 return ret;
1658 SMC_SET_E2P_DATA(lp, data);
1659 return 0;
1660 }
1661
1662 static int smc911x_ethtool_geteeprom(struct net_device *dev,
1663 struct ethtool_eeprom *eeprom, u8 *data)
1664 {
1665 u8 eebuf[SMC911X_EEPROM_LEN];
1666 int i, ret;
1667
1668 for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1669 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1670 return ret;
1671 if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1672 return ret;
1673 }
1674 memcpy(data, eebuf+eeprom->offset, eeprom->len);
1675 return 0;
1676 }
1677
1678 static int smc911x_ethtool_seteeprom(struct net_device *dev,
1679 struct ethtool_eeprom *eeprom, u8 *data)
1680 {
1681 int i, ret;
1682
1683 /* Enable erase */
1684 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1685 return ret;
1686 for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1687 /* erase byte */
1688 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1689 return ret;
1690 /* write byte */
1691 if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1692 return ret;
1693 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1694 return ret;
1695 }
1696 return 0;
1697 }
1698
1699 static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1700 {
1701 return SMC911X_EEPROM_LEN;
1702 }
1703
1704 static const struct ethtool_ops smc911x_ethtool_ops = {
1705 .get_settings = smc911x_ethtool_getsettings,
1706 .set_settings = smc911x_ethtool_setsettings,
1707 .get_drvinfo = smc911x_ethtool_getdrvinfo,
1708 .get_msglevel = smc911x_ethtool_getmsglevel,
1709 .set_msglevel = smc911x_ethtool_setmsglevel,
1710 .nway_reset = smc911x_ethtool_nwayreset,
1711 .get_link = ethtool_op_get_link,
1712 .get_regs_len = smc911x_ethtool_getregslen,
1713 .get_regs = smc911x_ethtool_getregs,
1714 .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1715 .get_eeprom = smc911x_ethtool_geteeprom,
1716 .set_eeprom = smc911x_ethtool_seteeprom,
1717 };
1718
1719 /*
1720 * smc911x_findirq
1721 *
1722 * This routine has a simple purpose -- make the SMC chip generate an
1723 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1724 */
1725 static int __devinit smc911x_findirq(struct net_device *dev)
1726 {
1727 struct smc911x_local *lp = netdev_priv(dev);
1728 int timeout = 20;
1729 unsigned long cookie;
1730
1731 DBG(SMC_DEBUG_FUNC, "--> %s\n", __func__);
1732
1733 cookie = probe_irq_on();
1734
1735 /*
1736 * Force a SW interrupt
1737 */
1738
1739 SMC_SET_INT_EN(lp, INT_EN_SW_INT_EN_);
1740
1741 /*
1742 * Wait until positive that the interrupt has been generated
1743 */
1744 do {
1745 int int_status;
1746 udelay(10);
1747 int_status = SMC_GET_INT_EN(lp);
1748 if (int_status & INT_EN_SW_INT_EN_)
1749 break; /* got the interrupt */
1750 } while (--timeout);
1751
1752 /*
1753 * there is really nothing that I can do here if timeout fails,
1754 * as autoirq_report will return a 0 anyway, which is what I
1755 * want in this case. Plus, the clean up is needed in both
1756 * cases.
1757 */
1758
1759 /* and disable all interrupts again */
1760 SMC_SET_INT_EN(lp, 0);
1761
1762 /* and return what I found */
1763 return probe_irq_off(cookie);
1764 }
1765
1766 static const struct net_device_ops smc911x_netdev_ops = {
1767 .ndo_open = smc911x_open,
1768 .ndo_stop = smc911x_close,
1769 .ndo_start_xmit = smc911x_hard_start_xmit,
1770 .ndo_tx_timeout = smc911x_timeout,
1771 .ndo_set_rx_mode = smc911x_set_multicast_list,
1772 .ndo_change_mtu = eth_change_mtu,
1773 .ndo_validate_addr = eth_validate_addr,
1774 .ndo_set_mac_address = eth_mac_addr,
1775 #ifdef CONFIG_NET_POLL_CONTROLLER
1776 .ndo_poll_controller = smc911x_poll_controller,
1777 #endif
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 __devinit 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, __func__);
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 0x%08x\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->netdev_ops = &smc911x_netdev_ops;
1947 dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1948 dev->ethtool_ops = &smc911x_ethtool_ops;
1949
1950 INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
1951 lp->mii.phy_id_mask = 0x1f;
1952 lp->mii.reg_num_mask = 0x1f;
1953 lp->mii.force_media = 0;
1954 lp->mii.full_duplex = 0;
1955 lp->mii.dev = dev;
1956 lp->mii.mdio_read = smc911x_phy_read;
1957 lp->mii.mdio_write = smc911x_phy_write;
1958
1959 /*
1960 * Locate the phy, if any.
1961 */
1962 smc911x_phy_detect(dev);
1963
1964 /* Set default parameters */
1965 lp->msg_enable = NETIF_MSG_LINK;
1966 lp->ctl_rfduplx = 1;
1967 lp->ctl_rspeed = 100;
1968
1969 #ifdef SMC_DYNAMIC_BUS_CONFIG
1970 irq_flags = lp->cfg.irq_flags;
1971 #else
1972 irq_flags = IRQF_SHARED | SMC_IRQ_SENSE;
1973 #endif
1974
1975 /* Grab the IRQ */
1976 retval = request_irq(dev->irq, smc911x_interrupt,
1977 irq_flags, dev->name, dev);
1978 if (retval)
1979 goto err_out;
1980
1981 #ifdef SMC_USE_DMA
1982 lp->rxdma = SMC_DMA_REQUEST(dev, smc911x_rx_dma_irq);
1983 lp->txdma = SMC_DMA_REQUEST(dev, smc911x_tx_dma_irq);
1984 lp->rxdma_active = 0;
1985 lp->txdma_active = 0;
1986 dev->dma = lp->rxdma;
1987 #endif
1988
1989 retval = register_netdev(dev);
1990 if (retval == 0) {
1991 /* now, print out the card info, in a short format.. */
1992 printk("%s: %s (rev %d) at %#lx IRQ %d",
1993 dev->name, version_string, lp->revision,
1994 dev->base_addr, dev->irq);
1995
1996 #ifdef SMC_USE_DMA
1997 if (lp->rxdma != -1)
1998 printk(" RXDMA %d ", lp->rxdma);
1999
2000 if (lp->txdma != -1)
2001 printk("TXDMA %d", lp->txdma);
2002 #endif
2003 printk("\n");
2004 if (!is_valid_ether_addr(dev->dev_addr)) {
2005 printk("%s: Invalid ethernet MAC address. Please "
2006 "set using ifconfig\n", dev->name);
2007 } else {
2008 /* Print the Ethernet address */
2009 printk("%s: Ethernet addr: %pM\n",
2010 dev->name, dev->dev_addr);
2011 }
2012
2013 if (lp->phy_type == 0) {
2014 PRINTK("%s: No PHY found\n", dev->name);
2015 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2016 PRINTK("%s: LAN911x Internal PHY\n", dev->name);
2017 } else {
2018 PRINTK("%s: External PHY 0x%08x\n", dev->name, lp->phy_type);
2019 }
2020 }
2021
2022 err_out:
2023 #ifdef SMC_USE_DMA
2024 if (retval) {
2025 if (lp->rxdma != -1) {
2026 SMC_DMA_FREE(dev, lp->rxdma);
2027 }
2028 if (lp->txdma != -1) {
2029 SMC_DMA_FREE(dev, lp->txdma);
2030 }
2031 }
2032 #endif
2033 return retval;
2034 }
2035
2036 /*
2037 * smc911x_init(void)
2038 *
2039 * Output:
2040 * 0 --> there is a device
2041 * anything else, error
2042 */
2043 static int __devinit smc911x_drv_probe(struct platform_device *pdev)
2044 {
2045 struct net_device *ndev;
2046 struct resource *res;
2047 struct smc911x_local *lp;
2048 unsigned int *addr;
2049 int ret;
2050
2051 DBG(SMC_DEBUG_FUNC, "--> %s\n", __func__);
2052 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2053 if (!res) {
2054 ret = -ENODEV;
2055 goto out;
2056 }
2057
2058 /*
2059 * Request the regions.
2060 */
2061 if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2062 ret = -EBUSY;
2063 goto out;
2064 }
2065
2066 ndev = alloc_etherdev(sizeof(struct smc911x_local));
2067 if (!ndev) {
2068 printk("%s: could not allocate device.\n", CARDNAME);
2069 ret = -ENOMEM;
2070 goto release_1;
2071 }
2072 SET_NETDEV_DEV(ndev, &pdev->dev);
2073
2074 ndev->dma = (unsigned char)-1;
2075 ndev->irq = platform_get_irq(pdev, 0);
2076 lp = netdev_priv(ndev);
2077 lp->netdev = ndev;
2078 #ifdef SMC_DYNAMIC_BUS_CONFIG
2079 {
2080 struct smc911x_platdata *pd = pdev->dev.platform_data;
2081 if (!pd) {
2082 ret = -EINVAL;
2083 goto release_both;
2084 }
2085 memcpy(&lp->cfg, pd, sizeof(lp->cfg));
2086 }
2087 #endif
2088
2089 addr = ioremap(res->start, SMC911X_IO_EXTENT);
2090 if (!addr) {
2091 ret = -ENOMEM;
2092 goto release_both;
2093 }
2094
2095 platform_set_drvdata(pdev, ndev);
2096 lp->base = addr;
2097 ndev->base_addr = res->start;
2098 ret = smc911x_probe(ndev);
2099 if (ret != 0) {
2100 platform_set_drvdata(pdev, NULL);
2101 iounmap(addr);
2102 release_both:
2103 free_netdev(ndev);
2104 release_1:
2105 release_mem_region(res->start, SMC911X_IO_EXTENT);
2106 out:
2107 printk("%s: not found (%d).\n", CARDNAME, ret);
2108 }
2109 #ifdef SMC_USE_DMA
2110 else {
2111 lp->physaddr = res->start;
2112 lp->dev = &pdev->dev;
2113 }
2114 #endif
2115
2116 return ret;
2117 }
2118
2119 static int __devexit smc911x_drv_remove(struct platform_device *pdev)
2120 {
2121 struct net_device *ndev = platform_get_drvdata(pdev);
2122 struct smc911x_local *lp = netdev_priv(ndev);
2123 struct resource *res;
2124
2125 DBG(SMC_DEBUG_FUNC, "--> %s\n", __func__);
2126 platform_set_drvdata(pdev, NULL);
2127
2128 unregister_netdev(ndev);
2129
2130 free_irq(ndev->irq, ndev);
2131
2132 #ifdef SMC_USE_DMA
2133 {
2134 if (lp->rxdma != -1) {
2135 SMC_DMA_FREE(dev, lp->rxdma);
2136 }
2137 if (lp->txdma != -1) {
2138 SMC_DMA_FREE(dev, lp->txdma);
2139 }
2140 }
2141 #endif
2142 iounmap(lp->base);
2143 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2144 release_mem_region(res->start, SMC911X_IO_EXTENT);
2145
2146 free_netdev(ndev);
2147 return 0;
2148 }
2149
2150 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2151 {
2152 struct net_device *ndev = platform_get_drvdata(dev);
2153 struct smc911x_local *lp = netdev_priv(ndev);
2154
2155 DBG(SMC_DEBUG_FUNC, "--> %s\n", __func__);
2156 if (ndev) {
2157 if (netif_running(ndev)) {
2158 netif_device_detach(ndev);
2159 smc911x_shutdown(ndev);
2160 #if POWER_DOWN
2161 /* Set D2 - Energy detect only setting */
2162 SMC_SET_PMT_CTRL(lp, 2<<12);
2163 #endif
2164 }
2165 }
2166 return 0;
2167 }
2168
2169 static int smc911x_drv_resume(struct platform_device *dev)
2170 {
2171 struct net_device *ndev = platform_get_drvdata(dev);
2172
2173 DBG(SMC_DEBUG_FUNC, "--> %s\n", __func__);
2174 if (ndev) {
2175 struct smc911x_local *lp = netdev_priv(ndev);
2176
2177 if (netif_running(ndev)) {
2178 smc911x_reset(ndev);
2179 if (lp->phy_type != 0)
2180 smc911x_phy_configure(&lp->phy_configure);
2181 smc911x_enable(ndev);
2182 netif_device_attach(ndev);
2183 }
2184 }
2185 return 0;
2186 }
2187
2188 static struct platform_driver smc911x_driver = {
2189 .probe = smc911x_drv_probe,
2190 .remove = __devexit_p(smc911x_drv_remove),
2191 .suspend = smc911x_drv_suspend,
2192 .resume = smc911x_drv_resume,
2193 .driver = {
2194 .name = CARDNAME,
2195 .owner = THIS_MODULE,
2196 },
2197 };
2198
2199 module_platform_driver(smc911x_driver);