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n_tty: Reduce branching in canon_copy_from_read_buf()
[linux/fpc-iii.git] / drivers / net / ethernet / smsc / smc911x.c
blobbd64eb982e5270e1c3272dbe936597c02116cddd
1 /*
2 * smc911x.c
3 * This is a driver for SMSC's LAN911{5,6,7,8} single-chip Ethernet devices.
4 *
5 * Copyright (C) 2005 Sensoria Corp
6 * Derived from the unified SMC91x driver by Nicolas Pitre
7 * and the smsc911x.c reference driver by SMSC
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 *
22 * Arguments:
23 * watchdog = TX watchdog timeout
24 * tx_fifo_kb = Size of TX FIFO in KB
25 *
26 * History:
27 * 04/16/05 Dustin McIntire Initial version
28 */
29 static const char version[] =
30 "smc911x.c: v1.0 04-16-2005 by Dustin McIntire <dustin@sensoria.com>\n";
31
32 /* Debugging options */
33 #define ENABLE_SMC_DEBUG_RX 0
34 #define ENABLE_SMC_DEBUG_TX 0
35 #define ENABLE_SMC_DEBUG_DMA 0
36 #define ENABLE_SMC_DEBUG_PKTS 0
37 #define ENABLE_SMC_DEBUG_MISC 0
38 #define ENABLE_SMC_DEBUG_FUNC 0
39
40 #define SMC_DEBUG_RX ((ENABLE_SMC_DEBUG_RX ? 1 : 0) << 0)
41 #define SMC_DEBUG_TX ((ENABLE_SMC_DEBUG_TX ? 1 : 0) << 1)
42 #define SMC_DEBUG_DMA ((ENABLE_SMC_DEBUG_DMA ? 1 : 0) << 2)
43 #define SMC_DEBUG_PKTS ((ENABLE_SMC_DEBUG_PKTS ? 1 : 0) << 3)
44 #define SMC_DEBUG_MISC ((ENABLE_SMC_DEBUG_MISC ? 1 : 0) << 4)
45 #define SMC_DEBUG_FUNC ((ENABLE_SMC_DEBUG_FUNC ? 1 : 0) << 5)
46
47 #ifndef SMC_DEBUG
48 #define SMC_DEBUG ( SMC_DEBUG_RX | \
49 SMC_DEBUG_TX | \
50 SMC_DEBUG_DMA | \
51 SMC_DEBUG_PKTS | \
52 SMC_DEBUG_MISC | \
53 SMC_DEBUG_FUNC \
54 )
55 #endif
56
57 #include <linux/module.h>
58 #include <linux/kernel.h>
59 #include <linux/sched.h>
60 #include <linux/delay.h>
61 #include <linux/interrupt.h>
62 #include <linux/errno.h>
63 #include <linux/ioport.h>
64 #include <linux/crc32.h>
65 #include <linux/device.h>
66 #include <linux/platform_device.h>
67 #include <linux/spinlock.h>
68 #include <linux/ethtool.h>
69 #include <linux/mii.h>
70 #include <linux/workqueue.h>
71
72 #include <linux/netdevice.h>
73 #include <linux/etherdevice.h>
74 #include <linux/skbuff.h>
75
76 #include <asm/io.h>
77
78 #include "smc911x.h"
79
80 /*
81 * Transmit timeout, default 5 seconds.
82 */
83 static int watchdog = 5000;
84 module_param(watchdog, int, 0400);
85 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
86
87 static int tx_fifo_kb=8;
88 module_param(tx_fifo_kb, int, 0400);
89 MODULE_PARM_DESC(tx_fifo_kb,"transmit FIFO size in KB (1<x<15)(default=8)");
90
91 MODULE_LICENSE("GPL");
92 MODULE_ALIAS("platform:smc911x");
93
94 /*
95 * The internal workings of the driver. If you are changing anything
96 * here with the SMC stuff, you should have the datasheet and know
97 * what you are doing.
98 */
99 #define CARDNAME "smc911x"
100
101 /*
102 * Use power-down feature of the chip
103 */
104 #define POWER_DOWN 1
105
106 #if SMC_DEBUG > 0
107 #define DBG(n, dev, args...) \
108 do { \
109 if (SMC_DEBUG & (n)) \
110 netdev_dbg(dev, args); \
111 } while (0)
112
113 #define PRINTK(dev, args...) netdev_info(dev, args)
114 #else
115 #define DBG(n, dev, args...) do { } while (0)
116 #define PRINTK(dev, args...) netdev_dbg(dev, args)
117 #endif
118
119 #if SMC_DEBUG_PKTS > 0
120 static void PRINT_PKT(u_char *buf, int length)
121 {
122 int i;
123 int remainder;
124 int lines;
125
126 lines = length / 16;
127 remainder = length % 16;
128
129 for (i = 0; i < lines ; i ++) {
130 int cur;
131 printk(KERN_DEBUG);
132 for (cur = 0; cur < 8; cur++) {
133 u_char a, b;
134 a = *buf++;
135 b = *buf++;
136 pr_cont("%02x%02x ", a, b);
137 }
138 pr_cont("\n");
139 }
140 printk(KERN_DEBUG);
141 for (i = 0; i < remainder/2 ; i++) {
142 u_char a, b;
143 a = *buf++;
144 b = *buf++;
145 pr_cont("%02x%02x ", a, b);
146 }
147 pr_cont("\n");
148 }
149 #else
150 #define PRINT_PKT(x...) do { } while (0)
151 #endif
152
153
154 /* this enables an interrupt in the interrupt mask register */
155 #define SMC_ENABLE_INT(lp, x) do { \
156 unsigned int __mask; \
157 __mask = SMC_GET_INT_EN((lp)); \
158 __mask |= (x); \
159 SMC_SET_INT_EN((lp), __mask); \
160 } while (0)
161
162 /* this disables an interrupt from the interrupt mask register */
163 #define SMC_DISABLE_INT(lp, x) do { \
164 unsigned int __mask; \
165 __mask = SMC_GET_INT_EN((lp)); \
166 __mask &= ~(x); \
167 SMC_SET_INT_EN((lp), __mask); \
168 } while (0)
169
170 /*
171 * this does a soft reset on the device
172 */
173 static void smc911x_reset(struct net_device *dev)
174 {
175 struct smc911x_local *lp = netdev_priv(dev);
176 unsigned int reg, timeout=0, resets=1, irq_cfg;
177 unsigned long flags;
178
179 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
180
181 /* Take out of PM setting first */
182 if ((SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_) == 0) {
183 /* Write to the bytetest will take out of powerdown */
184 SMC_SET_BYTE_TEST(lp, 0);
185 timeout=10;
186 do {
187 udelay(10);
188 reg = SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_;
189 } while (--timeout && !reg);
190 if (timeout == 0) {
191 PRINTK(dev, "smc911x_reset timeout waiting for PM restore\n");
192 return;
193 }
194 }
195
196 /* Disable all interrupts */
197 spin_lock_irqsave(&lp->lock, flags);
198 SMC_SET_INT_EN(lp, 0);
199 spin_unlock_irqrestore(&lp->lock, flags);
200
201 while (resets--) {
202 SMC_SET_HW_CFG(lp, HW_CFG_SRST_);
203 timeout=10;
204 do {
205 udelay(10);
206 reg = SMC_GET_HW_CFG(lp);
207 /* If chip indicates reset timeout then try again */
208 if (reg & HW_CFG_SRST_TO_) {
209 PRINTK(dev, "chip reset timeout, retrying...\n");
210 resets++;
211 break;
212 }
213 } while (--timeout && (reg & HW_CFG_SRST_));
214 }
215 if (timeout == 0) {
216 PRINTK(dev, "smc911x_reset timeout waiting for reset\n");
217 return;
218 }
219
220 /* make sure EEPROM has finished loading before setting GPIO_CFG */
221 timeout=1000;
222 while (--timeout && (SMC_GET_E2P_CMD(lp) & E2P_CMD_EPC_BUSY_))
223 udelay(10);
224
225 if (timeout == 0){
226 PRINTK(dev, "smc911x_reset timeout waiting for EEPROM busy\n");
227 return;
228 }
229
230 /* Initialize interrupts */
231 SMC_SET_INT_EN(lp, 0);
232 SMC_ACK_INT(lp, -1);
233
234 /* Reset the FIFO level and flow control settings */
235 SMC_SET_HW_CFG(lp, (lp->tx_fifo_kb & 0xF) << 16);
236 //TODO: Figure out what appropriate pause time is
237 SMC_SET_FLOW(lp, FLOW_FCPT_ | FLOW_FCEN_);
238 SMC_SET_AFC_CFG(lp, lp->afc_cfg);
239
240
241 /* Set to LED outputs */
242 SMC_SET_GPIO_CFG(lp, 0x70070000);
243
244 /*
245 * Deassert IRQ for 1*10us for edge type interrupts
246 * and drive IRQ pin push-pull
247 */
248 irq_cfg = (1 << 24) | INT_CFG_IRQ_EN_ | INT_CFG_IRQ_TYPE_;
249 #ifdef SMC_DYNAMIC_BUS_CONFIG
250 if (lp->cfg.irq_polarity)
251 irq_cfg |= INT_CFG_IRQ_POL_;
252 #endif
253 SMC_SET_IRQ_CFG(lp, irq_cfg);
254
255 /* clear anything saved */
256 if (lp->pending_tx_skb != NULL) {
257 dev_kfree_skb (lp->pending_tx_skb);
258 lp->pending_tx_skb = NULL;
259 dev->stats.tx_errors++;
260 dev->stats.tx_aborted_errors++;
261 }
262 }
263
264 /*
265 * Enable Interrupts, Receive, and Transmit
266 */
267 static void smc911x_enable(struct net_device *dev)
268 {
269 struct smc911x_local *lp = netdev_priv(dev);
270 unsigned mask, cfg, cr;
271 unsigned long flags;
272
273 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
274
275 spin_lock_irqsave(&lp->lock, flags);
276
277 SMC_SET_MAC_ADDR(lp, dev->dev_addr);
278
279 /* Enable TX */
280 cfg = SMC_GET_HW_CFG(lp);
281 cfg &= HW_CFG_TX_FIF_SZ_ | 0xFFF;
282 cfg |= HW_CFG_SF_;
283 SMC_SET_HW_CFG(lp, cfg);
284 SMC_SET_FIFO_TDA(lp, 0xFF);
285 /* Update TX stats on every 64 packets received or every 1 sec */
286 SMC_SET_FIFO_TSL(lp, 64);
287 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
288
289 SMC_GET_MAC_CR(lp, cr);
290 cr |= MAC_CR_TXEN_ | MAC_CR_HBDIS_;
291 SMC_SET_MAC_CR(lp, cr);
292 SMC_SET_TX_CFG(lp, TX_CFG_TX_ON_);
293
294 /* Add 2 byte padding to start of packets */
295 SMC_SET_RX_CFG(lp, (2<<8) & RX_CFG_RXDOFF_);
296
297 /* Turn on receiver and enable RX */
298 if (cr & MAC_CR_RXEN_)
299 DBG(SMC_DEBUG_RX, dev, "Receiver already enabled\n");
300
301 SMC_SET_MAC_CR(lp, cr | MAC_CR_RXEN_);
302
303 /* Interrupt on every received packet */
304 SMC_SET_FIFO_RSA(lp, 0x01);
305 SMC_SET_FIFO_RSL(lp, 0x00);
306
307 /* now, enable interrupts */
308 mask = INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_ | INT_EN_RSFL_EN_ |
309 INT_EN_GPT_INT_EN_ | INT_EN_RXDFH_INT_EN_ | INT_EN_RXE_EN_ |
310 INT_EN_PHY_INT_EN_;
311 if (IS_REV_A(lp->revision))
312 mask|=INT_EN_RDFL_EN_;
313 else {
314 mask|=INT_EN_RDFO_EN_;
315 }
316 SMC_ENABLE_INT(lp, mask);
317
318 spin_unlock_irqrestore(&lp->lock, flags);
319 }
320
321 /*
322 * this puts the device in an inactive state
323 */
324 static void smc911x_shutdown(struct net_device *dev)
325 {
326 struct smc911x_local *lp = netdev_priv(dev);
327 unsigned cr;
328 unsigned long flags;
329
330 DBG(SMC_DEBUG_FUNC, dev, "%s: --> %s\n", CARDNAME, __func__);
331
332 /* Disable IRQ's */
333 SMC_SET_INT_EN(lp, 0);
334
335 /* Turn of Rx and TX */
336 spin_lock_irqsave(&lp->lock, flags);
337 SMC_GET_MAC_CR(lp, cr);
338 cr &= ~(MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
339 SMC_SET_MAC_CR(lp, cr);
340 SMC_SET_TX_CFG(lp, TX_CFG_STOP_TX_);
341 spin_unlock_irqrestore(&lp->lock, flags);
342 }
343
344 static inline void smc911x_drop_pkt(struct net_device *dev)
345 {
346 struct smc911x_local *lp = netdev_priv(dev);
347 unsigned int fifo_count, timeout, reg;
348
349 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, dev, "%s: --> %s\n",
350 CARDNAME, __func__);
351 fifo_count = SMC_GET_RX_FIFO_INF(lp) & 0xFFFF;
352 if (fifo_count <= 4) {
353 /* Manually dump the packet data */
354 while (fifo_count--)
355 SMC_GET_RX_FIFO(lp);
356 } else {
357 /* Fast forward through the bad packet */
358 SMC_SET_RX_DP_CTRL(lp, RX_DP_CTRL_FFWD_BUSY_);
359 timeout=50;
360 do {
361 udelay(10);
362 reg = SMC_GET_RX_DP_CTRL(lp) & RX_DP_CTRL_FFWD_BUSY_;
363 } while (--timeout && reg);
364 if (timeout == 0) {
365 PRINTK(dev, "timeout waiting for RX fast forward\n");
366 }
367 }
368 }
369
370 /*
371 * This is the procedure to handle the receipt of a packet.
372 * It should be called after checking for packet presence in
373 * the RX status FIFO. It must be called with the spin lock
374 * already held.
375 */
376 static inline void smc911x_rcv(struct net_device *dev)
377 {
378 struct smc911x_local *lp = netdev_priv(dev);
379 unsigned int pkt_len, status;
380 struct sk_buff *skb;
381 unsigned char *data;
382
383 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, dev, "--> %s\n",
384 __func__);
385 status = SMC_GET_RX_STS_FIFO(lp);
386 DBG(SMC_DEBUG_RX, dev, "Rx pkt len %d status 0x%08x\n",
387 (status & 0x3fff0000) >> 16, status & 0xc000ffff);
388 pkt_len = (status & RX_STS_PKT_LEN_) >> 16;
389 if (status & RX_STS_ES_) {
390 /* Deal with a bad packet */
391 dev->stats.rx_errors++;
392 if (status & RX_STS_CRC_ERR_)
393 dev->stats.rx_crc_errors++;
394 else {
395 if (status & RX_STS_LEN_ERR_)
396 dev->stats.rx_length_errors++;
397 if (status & RX_STS_MCAST_)
398 dev->stats.multicast++;
399 }
400 /* Remove the bad packet data from the RX FIFO */
401 smc911x_drop_pkt(dev);
402 } else {
403 /* Receive a valid packet */
404 /* Alloc a buffer with extra room for DMA alignment */
405 skb = netdev_alloc_skb(dev, pkt_len+32);
406 if (unlikely(skb == NULL)) {
407 PRINTK(dev, "Low memory, rcvd packet dropped.\n");
408 dev->stats.rx_dropped++;
409 smc911x_drop_pkt(dev);
410 return;
411 }
412 /* Align IP header to 32 bits
413 * Note that the device is configured to add a 2
414 * byte padding to the packet start, so we really
415 * want to write to the orignal data pointer */
416 data = skb->data;
417 skb_reserve(skb, 2);
418 skb_put(skb,pkt_len-4);
419 #ifdef SMC_USE_DMA
420 {
421 unsigned int fifo;
422 /* Lower the FIFO threshold if possible */
423 fifo = SMC_GET_FIFO_INT(lp);
424 if (fifo & 0xFF) fifo--;
425 DBG(SMC_DEBUG_RX, dev, "Setting RX stat FIFO threshold to %d\n",
426 fifo & 0xff);
427 SMC_SET_FIFO_INT(lp, fifo);
428 /* Setup RX DMA */
429 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN16_ | ((2<<8) & RX_CFG_RXDOFF_));
430 lp->rxdma_active = 1;
431 lp->current_rx_skb = skb;
432 SMC_PULL_DATA(lp, data, (pkt_len+2+15) & ~15);
433 /* Packet processing deferred to DMA RX interrupt */
434 }
435 #else
436 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN4_ | ((2<<8) & RX_CFG_RXDOFF_));
437 SMC_PULL_DATA(lp, data, pkt_len+2+3);
438
439 DBG(SMC_DEBUG_PKTS, dev, "Received packet\n");
440 PRINT_PKT(data, ((pkt_len - 4) <= 64) ? pkt_len - 4 : 64);
441 skb->protocol = eth_type_trans(skb, dev);
442 netif_rx(skb);
443 dev->stats.rx_packets++;
444 dev->stats.rx_bytes += pkt_len-4;
445 #endif
446 }
447 }
448
449 /*
450 * This is called to actually send a packet to the chip.
451 */
452 static void smc911x_hardware_send_pkt(struct net_device *dev)
453 {
454 struct smc911x_local *lp = netdev_priv(dev);
455 struct sk_buff *skb;
456 unsigned int cmdA, cmdB, len;
457 unsigned char *buf;
458
459 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n", __func__);
460 BUG_ON(lp->pending_tx_skb == NULL);
461
462 skb = lp->pending_tx_skb;
463 lp->pending_tx_skb = NULL;
464
465 /* cmdA {25:24] data alignment [20:16] start offset [10:0] buffer length */
466 /* cmdB {31:16] pkt tag [10:0] length */
467 #ifdef SMC_USE_DMA
468 /* 16 byte buffer alignment mode */
469 buf = (char*)((u32)(skb->data) & ~0xF);
470 len = (skb->len + 0xF + ((u32)skb->data & 0xF)) & ~0xF;
471 cmdA = (1<<24) | (((u32)skb->data & 0xF)<<16) |
472 TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
473 skb->len;
474 #else
475 buf = (char*)((u32)skb->data & ~0x3);
476 len = (skb->len + 3 + ((u32)skb->data & 3)) & ~0x3;
477 cmdA = (((u32)skb->data & 0x3) << 16) |
478 TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
479 skb->len;
480 #endif
481 /* tag is packet length so we can use this in stats update later */
482 cmdB = (skb->len << 16) | (skb->len & 0x7FF);
483
484 DBG(SMC_DEBUG_TX, dev, "TX PKT LENGTH 0x%04x (%d) BUF 0x%p CMDA 0x%08x CMDB 0x%08x\n",
485 len, len, buf, cmdA, cmdB);
486 SMC_SET_TX_FIFO(lp, cmdA);
487 SMC_SET_TX_FIFO(lp, cmdB);
488
489 DBG(SMC_DEBUG_PKTS, dev, "Transmitted packet\n");
490 PRINT_PKT(buf, len <= 64 ? len : 64);
491
492 /* Send pkt via PIO or DMA */
493 #ifdef SMC_USE_DMA
494 lp->current_tx_skb = skb;
495 SMC_PUSH_DATA(lp, buf, len);
496 /* DMA complete IRQ will free buffer and set jiffies */
497 #else
498 SMC_PUSH_DATA(lp, buf, len);
499 dev->trans_start = jiffies;
500 dev_kfree_skb_irq(skb);
501 #endif
502 if (!lp->tx_throttle) {
503 netif_wake_queue(dev);
504 }
505 SMC_ENABLE_INT(lp, INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_);
506 }
507
508 /*
509 * Since I am not sure if I will have enough room in the chip's ram
510 * to store the packet, I call this routine which either sends it
511 * now, or set the card to generates an interrupt when ready
512 * for the packet.
513 */
514 static int smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
515 {
516 struct smc911x_local *lp = netdev_priv(dev);
517 unsigned int free;
518 unsigned long flags;
519
520 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
521 __func__);
522
523 spin_lock_irqsave(&lp->lock, flags);
524
525 BUG_ON(lp->pending_tx_skb != NULL);
526
527 free = SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TDFREE_;
528 DBG(SMC_DEBUG_TX, dev, "TX free space %d\n", free);
529
530 /* Turn off the flow when running out of space in FIFO */
531 if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
532 DBG(SMC_DEBUG_TX, dev, "Disabling data flow due to low FIFO space (%d)\n",
533 free);
534 /* Reenable when at least 1 packet of size MTU present */
535 SMC_SET_FIFO_TDA(lp, (SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
536 lp->tx_throttle = 1;
537 netif_stop_queue(dev);
538 }
539
540 /* Drop packets when we run out of space in TX FIFO
541 * Account for overhead required for:
542 *
543 * Tx command words 8 bytes
544 * Start offset 15 bytes
545 * End padding 15 bytes
546 */
547 if (unlikely(free < (skb->len + 8 + 15 + 15))) {
548 netdev_warn(dev, "No Tx free space %d < %d\n",
549 free, skb->len);
550 lp->pending_tx_skb = NULL;
551 dev->stats.tx_errors++;
552 dev->stats.tx_dropped++;
553 spin_unlock_irqrestore(&lp->lock, flags);
554 dev_kfree_skb_any(skb);
555 return NETDEV_TX_OK;
556 }
557
558 #ifdef SMC_USE_DMA
559 {
560 /* If the DMA is already running then defer this packet Tx until
561 * the DMA IRQ starts it
562 */
563 if (lp->txdma_active) {
564 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Tx DMA running, deferring packet\n");
565 lp->pending_tx_skb = skb;
566 netif_stop_queue(dev);
567 spin_unlock_irqrestore(&lp->lock, flags);
568 return NETDEV_TX_OK;
569 } else {
570 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Activating Tx DMA\n");
571 lp->txdma_active = 1;
572 }
573 }
574 #endif
575 lp->pending_tx_skb = skb;
576 smc911x_hardware_send_pkt(dev);
577 spin_unlock_irqrestore(&lp->lock, flags);
578
579 return NETDEV_TX_OK;
580 }
581
582 /*
583 * This handles a TX status interrupt, which is only called when:
584 * - a TX error occurred, or
585 * - TX of a packet completed.
586 */
587 static void smc911x_tx(struct net_device *dev)
588 {
589 struct smc911x_local *lp = netdev_priv(dev);
590 unsigned int tx_status;
591
592 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
593 __func__);
594
595 /* Collect the TX status */
596 while (((SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
597 DBG(SMC_DEBUG_TX, dev, "Tx stat FIFO used 0x%04x\n",
598 (SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16);
599 tx_status = SMC_GET_TX_STS_FIFO(lp);
600 dev->stats.tx_packets++;
601 dev->stats.tx_bytes+=tx_status>>16;
602 DBG(SMC_DEBUG_TX, dev, "Tx FIFO tag 0x%04x status 0x%04x\n",
603 (tx_status & 0xffff0000) >> 16,
604 tx_status & 0x0000ffff);
605 /* count Tx errors, but ignore lost carrier errors when in
606 * full-duplex mode */
607 if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
608 !(tx_status & 0x00000306))) {
609 dev->stats.tx_errors++;
610 }
611 if (tx_status & TX_STS_MANY_COLL_) {
612 dev->stats.collisions+=16;
613 dev->stats.tx_aborted_errors++;
614 } else {
615 dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
616 }
617 /* carrier error only has meaning for half-duplex communication */
618 if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
619 !lp->ctl_rfduplx) {
620 dev->stats.tx_carrier_errors++;
621 }
622 if (tx_status & TX_STS_LATE_COLL_) {
623 dev->stats.collisions++;
624 dev->stats.tx_aborted_errors++;
625 }
626 }
627 }
628
629
630 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
631 /*
632 * Reads a register from the MII Management serial interface
633 */
634
635 static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
636 {
637 struct smc911x_local *lp = netdev_priv(dev);
638 unsigned int phydata;
639
640 SMC_GET_MII(lp, phyreg, phyaddr, phydata);
641
642 DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
643 __func__, phyaddr, phyreg, phydata);
644 return phydata;
645 }
646
647
648 /*
649 * Writes a register to the MII Management serial interface
650 */
651 static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
652 int phydata)
653 {
654 struct smc911x_local *lp = netdev_priv(dev);
655
656 DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
657 __func__, phyaddr, phyreg, phydata);
658
659 SMC_SET_MII(lp, phyreg, phyaddr, phydata);
660 }
661
662 /*
663 * Finds and reports the PHY address (115 and 117 have external
664 * PHY interface 118 has internal only
665 */
666 static void smc911x_phy_detect(struct net_device *dev)
667 {
668 struct smc911x_local *lp = netdev_priv(dev);
669 int phyaddr;
670 unsigned int cfg, id1, id2;
671
672 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
673
674 lp->phy_type = 0;
675
676 /*
677 * Scan all 32 PHY addresses if necessary, starting at
678 * PHY#1 to PHY#31, and then PHY#0 last.
679 */
680 switch(lp->version) {
681 case CHIP_9115:
682 case CHIP_9117:
683 case CHIP_9215:
684 case CHIP_9217:
685 cfg = SMC_GET_HW_CFG(lp);
686 if (cfg & HW_CFG_EXT_PHY_DET_) {
687 cfg &= ~HW_CFG_PHY_CLK_SEL_;
688 cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
689 SMC_SET_HW_CFG(lp, cfg);
690 udelay(10); /* Wait for clocks to stop */
691
692 cfg |= HW_CFG_EXT_PHY_EN_;
693 SMC_SET_HW_CFG(lp, cfg);
694 udelay(10); /* Wait for clocks to stop */
695
696 cfg &= ~HW_CFG_PHY_CLK_SEL_;
697 cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
698 SMC_SET_HW_CFG(lp, cfg);
699 udelay(10); /* Wait for clocks to stop */
700
701 cfg |= HW_CFG_SMI_SEL_;
702 SMC_SET_HW_CFG(lp, cfg);
703
704 for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
705
706 /* Read the PHY identifiers */
707 SMC_GET_PHY_ID1(lp, phyaddr & 31, id1);
708 SMC_GET_PHY_ID2(lp, phyaddr & 31, id2);
709
710 /* Make sure it is a valid identifier */
711 if (id1 != 0x0000 && id1 != 0xffff &&
712 id1 != 0x8000 && id2 != 0x0000 &&
713 id2 != 0xffff && id2 != 0x8000) {
714 /* Save the PHY's address */
715 lp->mii.phy_id = phyaddr & 31;
716 lp->phy_type = id1 << 16 | id2;
717 break;
718 }
719 }
720 if (phyaddr < 32)
721 /* Found an external PHY */
722 break;
723 }
724 default:
725 /* Internal media only */
726 SMC_GET_PHY_ID1(lp, 1, id1);
727 SMC_GET_PHY_ID2(lp, 1, id2);
728 /* Save the PHY's address */
729 lp->mii.phy_id = 1;
730 lp->phy_type = id1 << 16 | id2;
731 }
732
733 DBG(SMC_DEBUG_MISC, dev, "phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%x\n",
734 id1, id2, lp->mii.phy_id);
735 }
736
737 /*
738 * Sets the PHY to a configuration as determined by the user.
739 * Called with spin_lock held.
740 */
741 static int smc911x_phy_fixed(struct net_device *dev)
742 {
743 struct smc911x_local *lp = netdev_priv(dev);
744 int phyaddr = lp->mii.phy_id;
745 int bmcr;
746
747 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
748
749 /* Enter Link Disable state */
750 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
751 bmcr |= BMCR_PDOWN;
752 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
753
754 /*
755 * Set our fixed capabilities
756 * Disable auto-negotiation
757 */
758 bmcr &= ~BMCR_ANENABLE;
759 if (lp->ctl_rfduplx)
760 bmcr |= BMCR_FULLDPLX;
761
762 if (lp->ctl_rspeed == 100)
763 bmcr |= BMCR_SPEED100;
764
765 /* Write our capabilities to the phy control register */
766 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
767
768 /* Re-Configure the Receive/Phy Control register */
769 bmcr &= ~BMCR_PDOWN;
770 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
771
772 return 1;
773 }
774
775 /**
776 * smc911x_phy_reset - reset the phy
777 * @dev: net device
778 * @phy: phy address
779 *
780 * Issue a software reset for the specified PHY and
781 * wait up to 100ms for the reset to complete. We should
782 * not access the PHY for 50ms after issuing the reset.
783 *
784 * The time to wait appears to be dependent on the PHY.
785 *
786 */
787 static int smc911x_phy_reset(struct net_device *dev, int phy)
788 {
789 struct smc911x_local *lp = netdev_priv(dev);
790 int timeout;
791 unsigned long flags;
792 unsigned int reg;
793
794 DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
795
796 spin_lock_irqsave(&lp->lock, flags);
797 reg = SMC_GET_PMT_CTRL(lp);
798 reg &= ~0xfffff030;
799 reg |= PMT_CTRL_PHY_RST_;
800 SMC_SET_PMT_CTRL(lp, reg);
801 spin_unlock_irqrestore(&lp->lock, flags);
802 for (timeout = 2; timeout; timeout--) {
803 msleep(50);
804 spin_lock_irqsave(&lp->lock, flags);
805 reg = SMC_GET_PMT_CTRL(lp);
806 spin_unlock_irqrestore(&lp->lock, flags);
807 if (!(reg & PMT_CTRL_PHY_RST_)) {
808 /* extra delay required because the phy may
809 * not be completed with its reset
810 * when PHY_BCR_RESET_ is cleared. 256us
811 * should suffice, but use 500us to be safe
812 */
813 udelay(500);
814 break;
815 }
816 }
817
818 return reg & PMT_CTRL_PHY_RST_;
819 }
820
821 /**
822 * smc911x_phy_powerdown - powerdown phy
823 * @dev: net device
824 * @phy: phy address
825 *
826 * Power down the specified PHY
827 */
828 static void smc911x_phy_powerdown(struct net_device *dev, int phy)
829 {
830 struct smc911x_local *lp = netdev_priv(dev);
831 unsigned int bmcr;
832
833 /* Enter Link Disable state */
834 SMC_GET_PHY_BMCR(lp, phy, bmcr);
835 bmcr |= BMCR_PDOWN;
836 SMC_SET_PHY_BMCR(lp, phy, bmcr);
837 }
838
839 /**
840 * smc911x_phy_check_media - check the media status and adjust BMCR
841 * @dev: net device
842 * @init: set true for initialisation
843 *
844 * Select duplex mode depending on negotiation state. This
845 * also updates our carrier state.
846 */
847 static void smc911x_phy_check_media(struct net_device *dev, int init)
848 {
849 struct smc911x_local *lp = netdev_priv(dev);
850 int phyaddr = lp->mii.phy_id;
851 unsigned int bmcr, cr;
852
853 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
854
855 if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
856 /* duplex state has changed */
857 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
858 SMC_GET_MAC_CR(lp, cr);
859 if (lp->mii.full_duplex) {
860 DBG(SMC_DEBUG_MISC, dev, "Configuring for full-duplex mode\n");
861 bmcr |= BMCR_FULLDPLX;
862 cr |= MAC_CR_RCVOWN_;
863 } else {
864 DBG(SMC_DEBUG_MISC, dev, "Configuring for half-duplex mode\n");
865 bmcr &= ~BMCR_FULLDPLX;
866 cr &= ~MAC_CR_RCVOWN_;
867 }
868 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
869 SMC_SET_MAC_CR(lp, cr);
870 }
871 }
872
873 /*
874 * Configures the specified PHY through the MII management interface
875 * using Autonegotiation.
876 * Calls smc911x_phy_fixed() if the user has requested a certain config.
877 * If RPC ANEG bit is set, the media selection is dependent purely on
878 * the selection by the MII (either in the MII BMCR reg or the result
879 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
880 * is controlled by the RPC SPEED and RPC DPLX bits.
881 */
882 static void smc911x_phy_configure(struct work_struct *work)
883 {
884 struct smc911x_local *lp = container_of(work, struct smc911x_local,
885 phy_configure);
886 struct net_device *dev = lp->netdev;
887 int phyaddr = lp->mii.phy_id;
888 int my_phy_caps; /* My PHY capabilities */
889 int my_ad_caps; /* My Advertised capabilities */
890 int status;
891 unsigned long flags;
892
893 DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
894
895 /*
896 * We should not be called if phy_type is zero.
897 */
898 if (lp->phy_type == 0)
899 return;
900
901 if (smc911x_phy_reset(dev, phyaddr)) {
902 netdev_info(dev, "PHY reset timed out\n");
903 return;
904 }
905 spin_lock_irqsave(&lp->lock, flags);
906
907 /*
908 * Enable PHY Interrupts (for register 18)
909 * Interrupts listed here are enabled
910 */
911 SMC_SET_PHY_INT_MASK(lp, phyaddr, PHY_INT_MASK_ENERGY_ON_ |
912 PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
913 PHY_INT_MASK_LINK_DOWN_);
914
915 /* If the user requested no auto neg, then go set his request */
916 if (lp->mii.force_media) {
917 smc911x_phy_fixed(dev);
918 goto smc911x_phy_configure_exit;
919 }
920
921 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
922 SMC_GET_PHY_BMSR(lp, phyaddr, my_phy_caps);
923 if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
924 netdev_info(dev, "Auto negotiation NOT supported\n");
925 smc911x_phy_fixed(dev);
926 goto smc911x_phy_configure_exit;
927 }
928
929 /* CSMA capable w/ both pauses */
930 my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
931
932 if (my_phy_caps & BMSR_100BASE4)
933 my_ad_caps |= ADVERTISE_100BASE4;
934 if (my_phy_caps & BMSR_100FULL)
935 my_ad_caps |= ADVERTISE_100FULL;
936 if (my_phy_caps & BMSR_100HALF)
937 my_ad_caps |= ADVERTISE_100HALF;
938 if (my_phy_caps & BMSR_10FULL)
939 my_ad_caps |= ADVERTISE_10FULL;
940 if (my_phy_caps & BMSR_10HALF)
941 my_ad_caps |= ADVERTISE_10HALF;
942
943 /* Disable capabilities not selected by our user */
944 if (lp->ctl_rspeed != 100)
945 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
946
947 if (!lp->ctl_rfduplx)
948 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
949
950 /* Update our Auto-Neg Advertisement Register */
951 SMC_SET_PHY_MII_ADV(lp, phyaddr, my_ad_caps);
952 lp->mii.advertising = my_ad_caps;
953
954 /*
955 * Read the register back. Without this, it appears that when
956 * auto-negotiation is restarted, sometimes it isn't ready and
957 * the link does not come up.
958 */
959 udelay(10);
960 SMC_GET_PHY_MII_ADV(lp, phyaddr, status);
961
962 DBG(SMC_DEBUG_MISC, dev, "phy caps=0x%04x\n", my_phy_caps);
963 DBG(SMC_DEBUG_MISC, dev, "phy advertised caps=0x%04x\n", my_ad_caps);
964
965 /* Restart auto-negotiation process in order to advertise my caps */
966 SMC_SET_PHY_BMCR(lp, phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
967
968 smc911x_phy_check_media(dev, 1);
969
970 smc911x_phy_configure_exit:
971 spin_unlock_irqrestore(&lp->lock, flags);
972 }
973
974 /*
975 * smc911x_phy_interrupt
976 *
977 * Purpose: Handle interrupts relating to PHY register 18. This is
978 * called from the "hard" interrupt handler under our private spinlock.
979 */
980 static void smc911x_phy_interrupt(struct net_device *dev)
981 {
982 struct smc911x_local *lp = netdev_priv(dev);
983 int phyaddr = lp->mii.phy_id;
984 int status;
985
986 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
987
988 if (lp->phy_type == 0)
989 return;
990
991 smc911x_phy_check_media(dev, 0);
992 /* read to clear status bits */
993 SMC_GET_PHY_INT_SRC(lp, phyaddr,status);
994 DBG(SMC_DEBUG_MISC, dev, "PHY interrupt status 0x%04x\n",
995 status & 0xffff);
996 DBG(SMC_DEBUG_MISC, dev, "AFC_CFG 0x%08x\n",
997 SMC_GET_AFC_CFG(lp));
998 }
999
1000 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1001
1002 /*
1003 * This is the main routine of the driver, to handle the device when
1004 * it needs some attention.
1005 */
1006 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1007 {
1008 struct net_device *dev = dev_id;
1009 struct smc911x_local *lp = netdev_priv(dev);
1010 unsigned int status, mask, timeout;
1011 unsigned int rx_overrun=0, cr, pkts;
1012 unsigned long flags;
1013
1014 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1015
1016 spin_lock_irqsave(&lp->lock, flags);
1017
1018 /* Spurious interrupt check */
1019 if ((SMC_GET_IRQ_CFG(lp) & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1020 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1021 spin_unlock_irqrestore(&lp->lock, flags);
1022 return IRQ_NONE;
1023 }
1024
1025 mask = SMC_GET_INT_EN(lp);
1026 SMC_SET_INT_EN(lp, 0);
1027
1028 /* set a timeout value, so I don't stay here forever */
1029 timeout = 8;
1030
1031
1032 do {
1033 status = SMC_GET_INT(lp);
1034
1035 DBG(SMC_DEBUG_MISC, dev, "INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1036 status, mask, status & ~mask);
1037
1038 status &= mask;
1039 if (!status)
1040 break;
1041
1042 /* Handle SW interrupt condition */
1043 if (status & INT_STS_SW_INT_) {
1044 SMC_ACK_INT(lp, INT_STS_SW_INT_);
1045 mask &= ~INT_EN_SW_INT_EN_;
1046 }
1047 /* Handle various error conditions */
1048 if (status & INT_STS_RXE_) {
1049 SMC_ACK_INT(lp, INT_STS_RXE_);
1050 dev->stats.rx_errors++;
1051 }
1052 if (status & INT_STS_RXDFH_INT_) {
1053 SMC_ACK_INT(lp, INT_STS_RXDFH_INT_);
1054 dev->stats.rx_dropped+=SMC_GET_RX_DROP(lp);
1055 }
1056 /* Undocumented interrupt-what is the right thing to do here? */
1057 if (status & INT_STS_RXDF_INT_) {
1058 SMC_ACK_INT(lp, INT_STS_RXDF_INT_);
1059 }
1060
1061 /* Rx Data FIFO exceeds set level */
1062 if (status & INT_STS_RDFL_) {
1063 if (IS_REV_A(lp->revision)) {
1064 rx_overrun=1;
1065 SMC_GET_MAC_CR(lp, cr);
1066 cr &= ~MAC_CR_RXEN_;
1067 SMC_SET_MAC_CR(lp, cr);
1068 DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1069 dev->stats.rx_errors++;
1070 dev->stats.rx_fifo_errors++;
1071 }
1072 SMC_ACK_INT(lp, INT_STS_RDFL_);
1073 }
1074 if (status & INT_STS_RDFO_) {
1075 if (!IS_REV_A(lp->revision)) {
1076 SMC_GET_MAC_CR(lp, cr);
1077 cr &= ~MAC_CR_RXEN_;
1078 SMC_SET_MAC_CR(lp, cr);
1079 rx_overrun=1;
1080 DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1081 dev->stats.rx_errors++;
1082 dev->stats.rx_fifo_errors++;
1083 }
1084 SMC_ACK_INT(lp, INT_STS_RDFO_);
1085 }
1086 /* Handle receive condition */
1087 if ((status & INT_STS_RSFL_) || rx_overrun) {
1088 unsigned int fifo;
1089 DBG(SMC_DEBUG_RX, dev, "RX irq\n");
1090 fifo = SMC_GET_RX_FIFO_INF(lp);
1091 pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1092 DBG(SMC_DEBUG_RX, dev, "Rx FIFO pkts %d, bytes %d\n",
1093 pkts, fifo & 0xFFFF);
1094 if (pkts != 0) {
1095 #ifdef SMC_USE_DMA
1096 unsigned int fifo;
1097 if (lp->rxdma_active){
1098 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1099 "RX DMA active\n");
1100 /* The DMA is already running so up the IRQ threshold */
1101 fifo = SMC_GET_FIFO_INT(lp) & ~0xFF;
1102 fifo |= pkts & 0xFF;
1103 DBG(SMC_DEBUG_RX, dev,
1104 "Setting RX stat FIFO threshold to %d\n",
1105 fifo & 0xff);
1106 SMC_SET_FIFO_INT(lp, fifo);
1107 } else
1108 #endif
1109 smc911x_rcv(dev);
1110 }
1111 SMC_ACK_INT(lp, INT_STS_RSFL_);
1112 }
1113 /* Handle transmit FIFO available */
1114 if (status & INT_STS_TDFA_) {
1115 DBG(SMC_DEBUG_TX, dev, "TX data FIFO space available irq\n");
1116 SMC_SET_FIFO_TDA(lp, 0xFF);
1117 lp->tx_throttle = 0;
1118 #ifdef SMC_USE_DMA
1119 if (!lp->txdma_active)
1120 #endif
1121 netif_wake_queue(dev);
1122 SMC_ACK_INT(lp, INT_STS_TDFA_);
1123 }
1124 /* Handle transmit done condition */
1125 #if 1
1126 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1127 DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC, dev,
1128 "Tx stat FIFO limit (%d) /GPT irq\n",
1129 (SMC_GET_FIFO_INT(lp) & 0x00ff0000) >> 16);
1130 smc911x_tx(dev);
1131 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1132 SMC_ACK_INT(lp, INT_STS_TSFL_);
1133 SMC_ACK_INT(lp, INT_STS_TSFL_ | INT_STS_GPT_INT_);
1134 }
1135 #else
1136 if (status & INT_STS_TSFL_) {
1137 DBG(SMC_DEBUG_TX, dev, "TX status FIFO limit (%d) irq\n", ?);
1138 smc911x_tx(dev);
1139 SMC_ACK_INT(lp, INT_STS_TSFL_);
1140 }
1141
1142 if (status & INT_STS_GPT_INT_) {
1143 DBG(SMC_DEBUG_RX, dev, "IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1144 SMC_GET_IRQ_CFG(lp),
1145 SMC_GET_FIFO_INT(lp),
1146 SMC_GET_RX_CFG(lp));
1147 DBG(SMC_DEBUG_RX, dev, "Rx Stat FIFO Used 0x%02x Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1148 (SMC_GET_RX_FIFO_INF(lp) & 0x00ff0000) >> 16,
1149 SMC_GET_RX_FIFO_INF(lp) & 0xffff,
1150 SMC_GET_RX_STS_FIFO_PEEK(lp));
1151 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1152 SMC_ACK_INT(lp, INT_STS_GPT_INT_);
1153 }
1154 #endif
1155
1156 /* Handle PHY interrupt condition */
1157 if (status & INT_STS_PHY_INT_) {
1158 DBG(SMC_DEBUG_MISC, dev, "PHY irq\n");
1159 smc911x_phy_interrupt(dev);
1160 SMC_ACK_INT(lp, INT_STS_PHY_INT_);
1161 }
1162 } while (--timeout);
1163
1164 /* restore mask state */
1165 SMC_SET_INT_EN(lp, mask);
1166
1167 DBG(SMC_DEBUG_MISC, dev, "Interrupt done (%d loops)\n",
1168 8-timeout);
1169
1170 spin_unlock_irqrestore(&lp->lock, flags);
1171
1172 return IRQ_HANDLED;
1173 }
1174
1175 #ifdef SMC_USE_DMA
1176 static void
1177 smc911x_tx_dma_irq(int dma, void *data)
1178 {
1179 struct net_device *dev = (struct net_device *)data;
1180 struct smc911x_local *lp = netdev_priv(dev);
1181 struct sk_buff *skb = lp->current_tx_skb;
1182 unsigned long flags;
1183
1184 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1185
1186 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "TX DMA irq handler\n");
1187 /* Clear the DMA interrupt sources */
1188 SMC_DMA_ACK_IRQ(dev, dma);
1189 BUG_ON(skb == NULL);
1190 dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1191 dev->trans_start = jiffies;
1192 dev_kfree_skb_irq(skb);
1193 lp->current_tx_skb = NULL;
1194 if (lp->pending_tx_skb != NULL)
1195 smc911x_hardware_send_pkt(dev);
1196 else {
1197 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev,
1198 "No pending Tx packets. DMA disabled\n");
1199 spin_lock_irqsave(&lp->lock, flags);
1200 lp->txdma_active = 0;
1201 if (!lp->tx_throttle) {
1202 netif_wake_queue(dev);
1203 }
1204 spin_unlock_irqrestore(&lp->lock, flags);
1205 }
1206
1207 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev,
1208 "TX DMA irq completed\n");
1209 }
1210 static void
1211 smc911x_rx_dma_irq(int dma, void *data)
1212 {
1213 struct net_device *dev = (struct net_device *)data;
1214 struct smc911x_local *lp = netdev_priv(dev);
1215 struct sk_buff *skb = lp->current_rx_skb;
1216 unsigned long flags;
1217 unsigned int pkts;
1218
1219 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1220 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev, "RX DMA irq handler\n");
1221 /* Clear the DMA interrupt sources */
1222 SMC_DMA_ACK_IRQ(dev, dma);
1223 dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1224 BUG_ON(skb == NULL);
1225 lp->current_rx_skb = NULL;
1226 PRINT_PKT(skb->data, skb->len);
1227 skb->protocol = eth_type_trans(skb, dev);
1228 dev->stats.rx_packets++;
1229 dev->stats.rx_bytes += skb->len;
1230 netif_rx(skb);
1231
1232 spin_lock_irqsave(&lp->lock, flags);
1233 pkts = (SMC_GET_RX_FIFO_INF(lp) & RX_FIFO_INF_RXSUSED_) >> 16;
1234 if (pkts != 0) {
1235 smc911x_rcv(dev);
1236 }else {
1237 lp->rxdma_active = 0;
1238 }
1239 spin_unlock_irqrestore(&lp->lock, flags);
1240 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1241 "RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1242 pkts);
1243 }
1244 #endif /* SMC_USE_DMA */
1245
1246 #ifdef CONFIG_NET_POLL_CONTROLLER
1247 /*
1248 * Polling receive - used by netconsole and other diagnostic tools
1249 * to allow network i/o with interrupts disabled.
1250 */
1251 static void smc911x_poll_controller(struct net_device *dev)
1252 {
1253 disable_irq(dev->irq);
1254 smc911x_interrupt(dev->irq, dev);
1255 enable_irq(dev->irq);
1256 }
1257 #endif
1258
1259 /* Our watchdog timed out. Called by the networking layer */
1260 static void smc911x_timeout(struct net_device *dev)
1261 {
1262 struct smc911x_local *lp = netdev_priv(dev);
1263 int status, mask;
1264 unsigned long flags;
1265
1266 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1267
1268 spin_lock_irqsave(&lp->lock, flags);
1269 status = SMC_GET_INT(lp);
1270 mask = SMC_GET_INT_EN(lp);
1271 spin_unlock_irqrestore(&lp->lock, flags);
1272 DBG(SMC_DEBUG_MISC, dev, "INT 0x%02x MASK 0x%02x\n",
1273 status, mask);
1274
1275 /* Dump the current TX FIFO contents and restart */
1276 mask = SMC_GET_TX_CFG(lp);
1277 SMC_SET_TX_CFG(lp, mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1278 /*
1279 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1280 * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1281 * which calls schedule(). Hence we use a work queue.
1282 */
1283 if (lp->phy_type != 0)
1284 schedule_work(&lp->phy_configure);
1285
1286 /* We can accept TX packets again */
1287 dev->trans_start = jiffies; /* prevent tx timeout */
1288 netif_wake_queue(dev);
1289 }
1290
1291 /*
1292 * This routine will, depending on the values passed to it,
1293 * either make it accept multicast packets, go into
1294 * promiscuous mode (for TCPDUMP and cousins) or accept
1295 * a select set of multicast packets
1296 */
1297 static void smc911x_set_multicast_list(struct net_device *dev)
1298 {
1299 struct smc911x_local *lp = netdev_priv(dev);
1300 unsigned int multicast_table[2];
1301 unsigned int mcr, update_multicast = 0;
1302 unsigned long flags;
1303
1304 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1305
1306 spin_lock_irqsave(&lp->lock, flags);
1307 SMC_GET_MAC_CR(lp, mcr);
1308 spin_unlock_irqrestore(&lp->lock, flags);
1309
1310 if (dev->flags & IFF_PROMISC) {
1311
1312 DBG(SMC_DEBUG_MISC, dev, "RCR_PRMS\n");
1313 mcr |= MAC_CR_PRMS_;
1314 }
1315 /*
1316 * Here, I am setting this to accept all multicast packets.
1317 * I don't need to zero the multicast table, because the flag is
1318 * checked before the table is
1319 */
1320 else if (dev->flags & IFF_ALLMULTI || netdev_mc_count(dev) > 16) {
1321 DBG(SMC_DEBUG_MISC, dev, "RCR_ALMUL\n");
1322 mcr |= MAC_CR_MCPAS_;
1323 }
1324
1325 /*
1326 * This sets the internal hardware table to filter out unwanted
1327 * multicast packets before they take up memory.
1328 *
1329 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1330 * address are the offset into the table. If that bit is 1, then the
1331 * multicast packet is accepted. Otherwise, it's dropped silently.
1332 *
1333 * To use the 6 bits as an offset into the table, the high 1 bit is
1334 * the number of the 32 bit register, while the low 5 bits are the bit
1335 * within that register.
1336 */
1337 else if (!netdev_mc_empty(dev)) {
1338 struct netdev_hw_addr *ha;
1339
1340 /* Set the Hash perfec mode */
1341 mcr |= MAC_CR_HPFILT_;
1342
1343 /* start with a table of all zeros: reject all */
1344 memset(multicast_table, 0, sizeof(multicast_table));
1345
1346 netdev_for_each_mc_addr(ha, dev) {
1347 u32 position;
1348
1349 /* upper 6 bits are used as hash index */
1350 position = ether_crc(ETH_ALEN, ha->addr)>>26;
1351
1352 multicast_table[position>>5] |= 1 << (position&0x1f);
1353 }
1354
1355 /* be sure I get rid of flags I might have set */
1356 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1357
1358 /* now, the table can be loaded into the chipset */
1359 update_multicast = 1;
1360 } else {
1361 DBG(SMC_DEBUG_MISC, dev, "~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n");
1362 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1363
1364 /*
1365 * since I'm disabling all multicast entirely, I need to
1366 * clear the multicast list
1367 */
1368 memset(multicast_table, 0, sizeof(multicast_table));
1369 update_multicast = 1;
1370 }
1371
1372 spin_lock_irqsave(&lp->lock, flags);
1373 SMC_SET_MAC_CR(lp, mcr);
1374 if (update_multicast) {
1375 DBG(SMC_DEBUG_MISC, dev,
1376 "update mcast hash table 0x%08x 0x%08x\n",
1377 multicast_table[0], multicast_table[1]);
1378 SMC_SET_HASHL(lp, multicast_table[0]);
1379 SMC_SET_HASHH(lp, multicast_table[1]);
1380 }
1381 spin_unlock_irqrestore(&lp->lock, flags);
1382 }
1383
1384
1385 /*
1386 * Open and Initialize the board
1387 *
1388 * Set up everything, reset the card, etc..
1389 */
1390 static int
1391 smc911x_open(struct net_device *dev)
1392 {
1393 struct smc911x_local *lp = netdev_priv(dev);
1394
1395 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1396
1397 /* reset the hardware */
1398 smc911x_reset(dev);
1399
1400 /* Configure the PHY, initialize the link state */
1401 smc911x_phy_configure(&lp->phy_configure);
1402
1403 /* Turn on Tx + Rx */
1404 smc911x_enable(dev);
1405
1406 netif_start_queue(dev);
1407
1408 return 0;
1409 }
1410
1411 /*
1412 * smc911x_close
1413 *
1414 * this makes the board clean up everything that it can
1415 * and not talk to the outside world. Caused by
1416 * an 'ifconfig ethX down'
1417 */
1418 static int smc911x_close(struct net_device *dev)
1419 {
1420 struct smc911x_local *lp = netdev_priv(dev);
1421
1422 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1423
1424 netif_stop_queue(dev);
1425 netif_carrier_off(dev);
1426
1427 /* clear everything */
1428 smc911x_shutdown(dev);
1429
1430 if (lp->phy_type != 0) {
1431 /* We need to ensure that no calls to
1432 * smc911x_phy_configure are pending.
1433 */
1434 cancel_work_sync(&lp->phy_configure);
1435 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1436 }
1437
1438 if (lp->pending_tx_skb) {
1439 dev_kfree_skb(lp->pending_tx_skb);
1440 lp->pending_tx_skb = NULL;
1441 }
1442
1443 return 0;
1444 }
1445
1446 /*
1447 * Ethtool support
1448 */
1449 static int
1450 smc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1451 {
1452 struct smc911x_local *lp = netdev_priv(dev);
1453 int ret, status;
1454 unsigned long flags;
1455
1456 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1457 cmd->maxtxpkt = 1;
1458 cmd->maxrxpkt = 1;
1459
1460 if (lp->phy_type != 0) {
1461 spin_lock_irqsave(&lp->lock, flags);
1462 ret = mii_ethtool_gset(&lp->mii, cmd);
1463 spin_unlock_irqrestore(&lp->lock, flags);
1464 } else {
1465 cmd->supported = SUPPORTED_10baseT_Half |
1466 SUPPORTED_10baseT_Full |
1467 SUPPORTED_TP | SUPPORTED_AUI;
1468
1469 if (lp->ctl_rspeed == 10)
1470 ethtool_cmd_speed_set(cmd, SPEED_10);
1471 else if (lp->ctl_rspeed == 100)
1472 ethtool_cmd_speed_set(cmd, SPEED_100);
1473
1474 cmd->autoneg = AUTONEG_DISABLE;
1475 if (lp->mii.phy_id==1)
1476 cmd->transceiver = XCVR_INTERNAL;
1477 else
1478 cmd->transceiver = XCVR_EXTERNAL;
1479 cmd->port = 0;
1480 SMC_GET_PHY_SPECIAL(lp, lp->mii.phy_id, status);
1481 cmd->duplex =
1482 (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1483 DUPLEX_FULL : DUPLEX_HALF;
1484 ret = 0;
1485 }
1486
1487 return ret;
1488 }
1489
1490 static int
1491 smc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1492 {
1493 struct smc911x_local *lp = netdev_priv(dev);
1494 int ret;
1495 unsigned long flags;
1496
1497 if (lp->phy_type != 0) {
1498 spin_lock_irqsave(&lp->lock, flags);
1499 ret = mii_ethtool_sset(&lp->mii, cmd);
1500 spin_unlock_irqrestore(&lp->lock, flags);
1501 } else {
1502 if (cmd->autoneg != AUTONEG_DISABLE ||
1503 cmd->speed != SPEED_10 ||
1504 (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1505 (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1506 return -EINVAL;
1507
1508 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1509
1510 ret = 0;
1511 }
1512
1513 return ret;
1514 }
1515
1516 static void
1517 smc911x_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1518 {
1519 strlcpy(info->driver, CARDNAME, sizeof(info->driver));
1520 strlcpy(info->version, version, sizeof(info->version));
1521 strlcpy(info->bus_info, dev_name(dev->dev.parent),
1522 sizeof(info->bus_info));
1523 }
1524
1525 static int smc911x_ethtool_nwayreset(struct net_device *dev)
1526 {
1527 struct smc911x_local *lp = netdev_priv(dev);
1528 int ret = -EINVAL;
1529 unsigned long flags;
1530
1531 if (lp->phy_type != 0) {
1532 spin_lock_irqsave(&lp->lock, flags);
1533 ret = mii_nway_restart(&lp->mii);
1534 spin_unlock_irqrestore(&lp->lock, flags);
1535 }
1536
1537 return ret;
1538 }
1539
1540 static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1541 {
1542 struct smc911x_local *lp = netdev_priv(dev);
1543 return lp->msg_enable;
1544 }
1545
1546 static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1547 {
1548 struct smc911x_local *lp = netdev_priv(dev);
1549 lp->msg_enable = level;
1550 }
1551
1552 static int smc911x_ethtool_getregslen(struct net_device *dev)
1553 {
1554 /* System regs + MAC regs + PHY regs */
1555 return (((E2P_CMD - ID_REV)/4 + 1) +
1556 (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1557 }
1558
1559 static void smc911x_ethtool_getregs(struct net_device *dev,
1560 struct ethtool_regs* regs, void *buf)
1561 {
1562 struct smc911x_local *lp = netdev_priv(dev);
1563 unsigned long flags;
1564 u32 reg,i,j=0;
1565 u32 *data = (u32*)buf;
1566
1567 regs->version = lp->version;
1568 for(i=ID_REV;i<=E2P_CMD;i+=4) {
1569 data[j++] = SMC_inl(lp, i);
1570 }
1571 for(i=MAC_CR;i<=WUCSR;i++) {
1572 spin_lock_irqsave(&lp->lock, flags);
1573 SMC_GET_MAC_CSR(lp, i, reg);
1574 spin_unlock_irqrestore(&lp->lock, flags);
1575 data[j++] = reg;
1576 }
1577 for(i=0;i<=31;i++) {
1578 spin_lock_irqsave(&lp->lock, flags);
1579 SMC_GET_MII(lp, i, lp->mii.phy_id, reg);
1580 spin_unlock_irqrestore(&lp->lock, flags);
1581 data[j++] = reg & 0xFFFF;
1582 }
1583 }
1584
1585 static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1586 {
1587 struct smc911x_local *lp = netdev_priv(dev);
1588 unsigned int timeout;
1589 int e2p_cmd;
1590
1591 e2p_cmd = SMC_GET_E2P_CMD(lp);
1592 for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1593 if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1594 PRINTK(dev, "%s timeout waiting for EEPROM to respond\n",
1595 __func__);
1596 return -EFAULT;
1597 }
1598 mdelay(1);
1599 e2p_cmd = SMC_GET_E2P_CMD(lp);
1600 }
1601 if (timeout == 0) {
1602 PRINTK(dev, "%s timeout waiting for EEPROM CMD not busy\n",
1603 __func__);
1604 return -ETIMEDOUT;
1605 }
1606 return 0;
1607 }
1608
1609 static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1610 int cmd, int addr)
1611 {
1612 struct smc911x_local *lp = netdev_priv(dev);
1613 int ret;
1614
1615 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1616 return ret;
1617 SMC_SET_E2P_CMD(lp, E2P_CMD_EPC_BUSY_ |
1618 ((cmd) & (0x7<<28)) |
1619 ((addr) & 0xFF));
1620 return 0;
1621 }
1622
1623 static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1624 u8 *data)
1625 {
1626 struct smc911x_local *lp = netdev_priv(dev);
1627 int ret;
1628
1629 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1630 return ret;
1631 *data = SMC_GET_E2P_DATA(lp);
1632 return 0;
1633 }
1634
1635 static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1636 u8 data)
1637 {
1638 struct smc911x_local *lp = netdev_priv(dev);
1639 int ret;
1640
1641 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1642 return ret;
1643 SMC_SET_E2P_DATA(lp, data);
1644 return 0;
1645 }
1646
1647 static int smc911x_ethtool_geteeprom(struct net_device *dev,
1648 struct ethtool_eeprom *eeprom, u8 *data)
1649 {
1650 u8 eebuf[SMC911X_EEPROM_LEN];
1651 int i, ret;
1652
1653 for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1654 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1655 return ret;
1656 if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1657 return ret;
1658 }
1659 memcpy(data, eebuf+eeprom->offset, eeprom->len);
1660 return 0;
1661 }
1662
1663 static int smc911x_ethtool_seteeprom(struct net_device *dev,
1664 struct ethtool_eeprom *eeprom, u8 *data)
1665 {
1666 int i, ret;
1667
1668 /* Enable erase */
1669 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1670 return ret;
1671 for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1672 /* erase byte */
1673 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1674 return ret;
1675 /* write byte */
1676 if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1677 return ret;
1678 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1679 return ret;
1680 }
1681 return 0;
1682 }
1683
1684 static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1685 {
1686 return SMC911X_EEPROM_LEN;
1687 }
1688
1689 static const struct ethtool_ops smc911x_ethtool_ops = {
1690 .get_settings = smc911x_ethtool_getsettings,
1691 .set_settings = smc911x_ethtool_setsettings,
1692 .get_drvinfo = smc911x_ethtool_getdrvinfo,
1693 .get_msglevel = smc911x_ethtool_getmsglevel,
1694 .set_msglevel = smc911x_ethtool_setmsglevel,
1695 .nway_reset = smc911x_ethtool_nwayreset,
1696 .get_link = ethtool_op_get_link,
1697 .get_regs_len = smc911x_ethtool_getregslen,
1698 .get_regs = smc911x_ethtool_getregs,
1699 .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1700 .get_eeprom = smc911x_ethtool_geteeprom,
1701 .set_eeprom = smc911x_ethtool_seteeprom,
1702 };
1703
1704 /*
1705 * smc911x_findirq
1706 *
1707 * This routine has a simple purpose -- make the SMC chip generate an
1708 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1709 */
1710 static int smc911x_findirq(struct net_device *dev)
1711 {
1712 struct smc911x_local *lp = netdev_priv(dev);
1713 int timeout = 20;
1714 unsigned long cookie;
1715
1716 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1717
1718 cookie = probe_irq_on();
1719
1720 /*
1721 * Force a SW interrupt
1722 */
1723
1724 SMC_SET_INT_EN(lp, INT_EN_SW_INT_EN_);
1725
1726 /*
1727 * Wait until positive that the interrupt has been generated
1728 */
1729 do {
1730 int int_status;
1731 udelay(10);
1732 int_status = SMC_GET_INT_EN(lp);
1733 if (int_status & INT_EN_SW_INT_EN_)
1734 break; /* got the interrupt */
1735 } while (--timeout);
1736
1737 /*
1738 * there is really nothing that I can do here if timeout fails,
1739 * as autoirq_report will return a 0 anyway, which is what I
1740 * want in this case. Plus, the clean up is needed in both
1741 * cases.
1742 */
1743
1744 /* and disable all interrupts again */
1745 SMC_SET_INT_EN(lp, 0);
1746
1747 /* and return what I found */
1748 return probe_irq_off(cookie);
1749 }
1750
1751 static const struct net_device_ops smc911x_netdev_ops = {
1752 .ndo_open = smc911x_open,
1753 .ndo_stop = smc911x_close,
1754 .ndo_start_xmit = smc911x_hard_start_xmit,
1755 .ndo_tx_timeout = smc911x_timeout,
1756 .ndo_set_rx_mode = smc911x_set_multicast_list,
1757 .ndo_change_mtu = eth_change_mtu,
1758 .ndo_validate_addr = eth_validate_addr,
1759 .ndo_set_mac_address = eth_mac_addr,
1760 #ifdef CONFIG_NET_POLL_CONTROLLER
1761 .ndo_poll_controller = smc911x_poll_controller,
1762 #endif
1763 };
1764
1765 /*
1766 * Function: smc911x_probe(unsigned long ioaddr)
1767 *
1768 * Purpose:
1769 * Tests to see if a given ioaddr points to an SMC911x chip.
1770 * Returns a 0 on success
1771 *
1772 * Algorithm:
1773 * (1) see if the endian word is OK
1774 * (1) see if I recognize the chip ID in the appropriate register
1775 *
1776 * Here I do typical initialization tasks.
1777 *
1778 * o Initialize the structure if needed
1779 * o print out my vanity message if not done so already
1780 * o print out what type of hardware is detected
1781 * o print out the ethernet address
1782 * o find the IRQ
1783 * o set up my private data
1784 * o configure the dev structure with my subroutines
1785 * o actually GRAB the irq.
1786 * o GRAB the region
1787 */
1788 static int smc911x_probe(struct net_device *dev)
1789 {
1790 struct smc911x_local *lp = netdev_priv(dev);
1791 int i, retval;
1792 unsigned int val, chip_id, revision;
1793 const char *version_string;
1794 unsigned long irq_flags;
1795
1796 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1797
1798 /* First, see if the endian word is recognized */
1799 val = SMC_GET_BYTE_TEST(lp);
1800 DBG(SMC_DEBUG_MISC, dev, "%s: endian probe returned 0x%04x\n",
1801 CARDNAME, val);
1802 if (val != 0x87654321) {
1803 netdev_err(dev, "Invalid chip endian 0x%08x\n", val);
1804 retval = -ENODEV;
1805 goto err_out;
1806 }
1807
1808 /*
1809 * check if the revision register is something that I
1810 * recognize. These might need to be added to later,
1811 * as future revisions could be added.
1812 */
1813 chip_id = SMC_GET_PN(lp);
1814 DBG(SMC_DEBUG_MISC, dev, "%s: id probe returned 0x%04x\n",
1815 CARDNAME, chip_id);
1816 for(i=0;chip_ids[i].id != 0; i++) {
1817 if (chip_ids[i].id == chip_id) break;
1818 }
1819 if (!chip_ids[i].id) {
1820 netdev_err(dev, "Unknown chip ID %04x\n", chip_id);
1821 retval = -ENODEV;
1822 goto err_out;
1823 }
1824 version_string = chip_ids[i].name;
1825
1826 revision = SMC_GET_REV(lp);
1827 DBG(SMC_DEBUG_MISC, dev, "%s: revision = 0x%04x\n", CARDNAME, revision);
1828
1829 /* At this point I'll assume that the chip is an SMC911x. */
1830 DBG(SMC_DEBUG_MISC, dev, "%s: Found a %s\n",
1831 CARDNAME, chip_ids[i].name);
1832
1833 /* Validate the TX FIFO size requested */
1834 if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1835 netdev_err(dev, "Invalid TX FIFO size requested %d\n",
1836 tx_fifo_kb);
1837 retval = -EINVAL;
1838 goto err_out;
1839 }
1840
1841 /* fill in some of the fields */
1842 lp->version = chip_ids[i].id;
1843 lp->revision = revision;
1844 lp->tx_fifo_kb = tx_fifo_kb;
1845 /* Reverse calculate the RX FIFO size from the TX */
1846 lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1847 lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1848
1849 /* Set the automatic flow control values */
1850 switch(lp->tx_fifo_kb) {
1851 /*
1852 * AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1853 * AFC_LO is AFC_HI/2
1854 * BACK_DUR is about 5uS*(AFC_LO) rounded down
1855 */
1856 case 2:/* 13440 Rx Data Fifo Size */
1857 lp->afc_cfg=0x008C46AF;break;
1858 case 3:/* 12480 Rx Data Fifo Size */
1859 lp->afc_cfg=0x0082419F;break;
1860 case 4:/* 11520 Rx Data Fifo Size */
1861 lp->afc_cfg=0x00783C9F;break;
1862 case 5:/* 10560 Rx Data Fifo Size */
1863 lp->afc_cfg=0x006E374F;break;
1864 case 6:/* 9600 Rx Data Fifo Size */
1865 lp->afc_cfg=0x0064328F;break;
1866 case 7:/* 8640 Rx Data Fifo Size */
1867 lp->afc_cfg=0x005A2D7F;break;
1868 case 8:/* 7680 Rx Data Fifo Size */
1869 lp->afc_cfg=0x0050287F;break;
1870 case 9:/* 6720 Rx Data Fifo Size */
1871 lp->afc_cfg=0x0046236F;break;
1872 case 10:/* 5760 Rx Data Fifo Size */
1873 lp->afc_cfg=0x003C1E6F;break;
1874 case 11:/* 4800 Rx Data Fifo Size */
1875 lp->afc_cfg=0x0032195F;break;
1876 /*
1877 * AFC_HI is ~1520 bytes less than RX Data Fifo Size
1878 * AFC_LO is AFC_HI/2
1879 * BACK_DUR is about 5uS*(AFC_LO) rounded down
1880 */
1881 case 12:/* 3840 Rx Data Fifo Size */
1882 lp->afc_cfg=0x0024124F;break;
1883 case 13:/* 2880 Rx Data Fifo Size */
1884 lp->afc_cfg=0x0015073F;break;
1885 case 14:/* 1920 Rx Data Fifo Size */
1886 lp->afc_cfg=0x0006032F;break;
1887 default:
1888 PRINTK(dev, "ERROR -- no AFC_CFG setting found");
1889 break;
1890 }
1891
1892 DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX, dev,
1893 "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1894 lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1895
1896 spin_lock_init(&lp->lock);
1897
1898 /* Get the MAC address */
1899 SMC_GET_MAC_ADDR(lp, dev->dev_addr);
1900
1901 /* now, reset the chip, and put it into a known state */
1902 smc911x_reset(dev);
1903
1904 /*
1905 * If dev->irq is 0, then the device has to be banged on to see
1906 * what the IRQ is.
1907 *
1908 * Specifying an IRQ is done with the assumption that the user knows
1909 * what (s)he is doing. No checking is done!!!!
1910 */
1911 if (dev->irq < 1) {
1912 int trials;
1913
1914 trials = 3;
1915 while (trials--) {
1916 dev->irq = smc911x_findirq(dev);
1917 if (dev->irq)
1918 break;
1919 /* kick the card and try again */
1920 smc911x_reset(dev);
1921 }
1922 }
1923 if (dev->irq == 0) {
1924 netdev_warn(dev, "Couldn't autodetect your IRQ. Use irq=xx.\n");
1925 retval = -ENODEV;
1926 goto err_out;
1927 }
1928 dev->irq = irq_canonicalize(dev->irq);
1929
1930 dev->netdev_ops = &smc911x_netdev_ops;
1931 dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1932 dev->ethtool_ops = &smc911x_ethtool_ops;
1933
1934 INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
1935 lp->mii.phy_id_mask = 0x1f;
1936 lp->mii.reg_num_mask = 0x1f;
1937 lp->mii.force_media = 0;
1938 lp->mii.full_duplex = 0;
1939 lp->mii.dev = dev;
1940 lp->mii.mdio_read = smc911x_phy_read;
1941 lp->mii.mdio_write = smc911x_phy_write;
1942
1943 /*
1944 * Locate the phy, if any.
1945 */
1946 smc911x_phy_detect(dev);
1947
1948 /* Set default parameters */
1949 lp->msg_enable = NETIF_MSG_LINK;
1950 lp->ctl_rfduplx = 1;
1951 lp->ctl_rspeed = 100;
1952
1953 #ifdef SMC_DYNAMIC_BUS_CONFIG
1954 irq_flags = lp->cfg.irq_flags;
1955 #else
1956 irq_flags = IRQF_SHARED | SMC_IRQ_SENSE;
1957 #endif
1958
1959 /* Grab the IRQ */
1960 retval = request_irq(dev->irq, smc911x_interrupt,
1961 irq_flags, dev->name, dev);
1962 if (retval)
1963 goto err_out;
1964
1965 #ifdef SMC_USE_DMA
1966 lp->rxdma = SMC_DMA_REQUEST(dev, smc911x_rx_dma_irq);
1967 lp->txdma = SMC_DMA_REQUEST(dev, smc911x_tx_dma_irq);
1968 lp->rxdma_active = 0;
1969 lp->txdma_active = 0;
1970 dev->dma = lp->rxdma;
1971 #endif
1972
1973 retval = register_netdev(dev);
1974 if (retval == 0) {
1975 /* now, print out the card info, in a short format.. */
1976 netdev_info(dev, "%s (rev %d) at %#lx IRQ %d",
1977 version_string, lp->revision,
1978 dev->base_addr, dev->irq);
1979
1980 #ifdef SMC_USE_DMA
1981 if (lp->rxdma != -1)
1982 pr_cont(" RXDMA %d", lp->rxdma);
1983
1984 if (lp->txdma != -1)
1985 pr_cont(" TXDMA %d", lp->txdma);
1986 #endif
1987 pr_cont("\n");
1988 if (!is_valid_ether_addr(dev->dev_addr)) {
1989 netdev_warn(dev, "Invalid ethernet MAC address. Please set using ifconfig\n");
1990 } else {
1991 /* Print the Ethernet address */
1992 netdev_info(dev, "Ethernet addr: %pM\n",
1993 dev->dev_addr);
1994 }
1995
1996 if (lp->phy_type == 0) {
1997 PRINTK(dev, "No PHY found\n");
1998 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
1999 PRINTK(dev, "LAN911x Internal PHY\n");
2000 } else {
2001 PRINTK(dev, "External PHY 0x%08x\n", lp->phy_type);
2002 }
2003 }
2004
2005 err_out:
2006 #ifdef SMC_USE_DMA
2007 if (retval) {
2008 if (lp->rxdma != -1) {
2009 SMC_DMA_FREE(dev, lp->rxdma);
2010 }
2011 if (lp->txdma != -1) {
2012 SMC_DMA_FREE(dev, lp->txdma);
2013 }
2014 }
2015 #endif
2016 return retval;
2017 }
2018
2019 /*
2020 * smc911x_drv_probe(void)
2021 *
2022 * Output:
2023 * 0 --> there is a device
2024 * anything else, error
2025 */
2026 static int smc911x_drv_probe(struct platform_device *pdev)
2027 {
2028 struct net_device *ndev;
2029 struct resource *res;
2030 struct smc911x_local *lp;
2031 void __iomem *addr;
2032 int ret;
2033
2034 /* ndev is not valid yet, so avoid passing it in. */
2035 DBG(SMC_DEBUG_FUNC, "--> %s\n", __func__);
2036 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2037 if (!res) {
2038 ret = -ENODEV;
2039 goto out;
2040 }
2041
2042 /*
2043 * Request the regions.
2044 */
2045 if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2046 ret = -EBUSY;
2047 goto out;
2048 }
2049
2050 ndev = alloc_etherdev(sizeof(struct smc911x_local));
2051 if (!ndev) {
2052 ret = -ENOMEM;
2053 goto release_1;
2054 }
2055 SET_NETDEV_DEV(ndev, &pdev->dev);
2056
2057 ndev->dma = (unsigned char)-1;
2058 ndev->irq = platform_get_irq(pdev, 0);
2059 lp = netdev_priv(ndev);
2060 lp->netdev = ndev;
2061 #ifdef SMC_DYNAMIC_BUS_CONFIG
2062 {
2063 struct smc911x_platdata *pd = dev_get_platdata(&pdev->dev);
2064 if (!pd) {
2065 ret = -EINVAL;
2066 goto release_both;
2067 }
2068 memcpy(&lp->cfg, pd, sizeof(lp->cfg));
2069 }
2070 #endif
2071
2072 addr = ioremap(res->start, SMC911X_IO_EXTENT);
2073 if (!addr) {
2074 ret = -ENOMEM;
2075 goto release_both;
2076 }
2077
2078 platform_set_drvdata(pdev, ndev);
2079 lp->base = addr;
2080 ndev->base_addr = res->start;
2081 ret = smc911x_probe(ndev);
2082 if (ret != 0) {
2083 iounmap(addr);
2084 release_both:
2085 free_netdev(ndev);
2086 release_1:
2087 release_mem_region(res->start, SMC911X_IO_EXTENT);
2088 out:
2089 pr_info("%s: not found (%d).\n", CARDNAME, ret);
2090 }
2091 #ifdef SMC_USE_DMA
2092 else {
2093 lp->physaddr = res->start;
2094 lp->dev = &pdev->dev;
2095 }
2096 #endif
2097
2098 return ret;
2099 }
2100
2101 static int smc911x_drv_remove(struct platform_device *pdev)
2102 {
2103 struct net_device *ndev = platform_get_drvdata(pdev);
2104 struct smc911x_local *lp = netdev_priv(ndev);
2105 struct resource *res;
2106
2107 DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2108
2109 unregister_netdev(ndev);
2110
2111 free_irq(ndev->irq, ndev);
2112
2113 #ifdef SMC_USE_DMA
2114 {
2115 if (lp->rxdma != -1) {
2116 SMC_DMA_FREE(dev, lp->rxdma);
2117 }
2118 if (lp->txdma != -1) {
2119 SMC_DMA_FREE(dev, lp->txdma);
2120 }
2121 }
2122 #endif
2123 iounmap(lp->base);
2124 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2125 release_mem_region(res->start, SMC911X_IO_EXTENT);
2126
2127 free_netdev(ndev);
2128 return 0;
2129 }
2130
2131 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2132 {
2133 struct net_device *ndev = platform_get_drvdata(dev);
2134 struct smc911x_local *lp = netdev_priv(ndev);
2135
2136 DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2137 if (ndev) {
2138 if (netif_running(ndev)) {
2139 netif_device_detach(ndev);
2140 smc911x_shutdown(ndev);
2141 #if POWER_DOWN
2142 /* Set D2 - Energy detect only setting */
2143 SMC_SET_PMT_CTRL(lp, 2<<12);
2144 #endif
2145 }
2146 }
2147 return 0;
2148 }
2149
2150 static int smc911x_drv_resume(struct platform_device *dev)
2151 {
2152 struct net_device *ndev = platform_get_drvdata(dev);
2153
2154 DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2155 if (ndev) {
2156 struct smc911x_local *lp = netdev_priv(ndev);
2157
2158 if (netif_running(ndev)) {
2159 smc911x_reset(ndev);
2160 if (lp->phy_type != 0)
2161 smc911x_phy_configure(&lp->phy_configure);
2162 smc911x_enable(ndev);
2163 netif_device_attach(ndev);
2164 }
2165 }
2166 return 0;
2167 }
2168
2169 static struct platform_driver smc911x_driver = {
2170 .probe = smc911x_drv_probe,
2171 .remove = smc911x_drv_remove,
2172 .suspend = smc911x_drv_suspend,
2173 .resume = smc911x_drv_resume,
2174 .driver = {
2175 .name = CARDNAME,
2176 },
2177 };
2178
2179 module_platform_driver(smc911x_driver);
Linux with added FPC-III support