1 /*
2 * smc911x.c
3 * This is a driver for SMSC's LAN911{5,6,7,8} single-chip Ethernet devices.
4 *
5 * Copyright (C) 2005 Sensoria Corp
6 * Derived from the unified SMC91x driver by Nicolas Pitre
7 * and the smsc911x.c reference driver by SMSC
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 *
22 * Arguments:
23 * watchdog = TX watchdog timeout
24 * tx_fifo_kb = Size of TX FIFO in KB
25 *
26 * History:
27 * 04/16/05 Dustin McIntire Initial version
28 */
29 static const char version[] =
30 "smc911x.c: v1.0 04-16-2005 by Dustin McIntire <dustin@sensoria.com>\n";
31
32 /* Debugging options */
33 #define ENABLE_SMC_DEBUG_RX 0
34 #define ENABLE_SMC_DEBUG_TX 0
35 #define ENABLE_SMC_DEBUG_DMA 0
36 #define ENABLE_SMC_DEBUG_PKTS 0
37 #define ENABLE_SMC_DEBUG_MISC 0
38 #define ENABLE_SMC_DEBUG_FUNC 0
39
40 #define SMC_DEBUG_RX ((ENABLE_SMC_DEBUG_RX ? 1 : 0) << 0)
41 #define SMC_DEBUG_TX ((ENABLE_SMC_DEBUG_TX ? 1 : 0) << 1)
42 #define SMC_DEBUG_DMA ((ENABLE_SMC_DEBUG_DMA ? 1 : 0) << 2)
43 #define SMC_DEBUG_PKTS ((ENABLE_SMC_DEBUG_PKTS ? 1 : 0) << 3)
44 #define SMC_DEBUG_MISC ((ENABLE_SMC_DEBUG_MISC ? 1 : 0) << 4)
45 #define SMC_DEBUG_FUNC ((ENABLE_SMC_DEBUG_FUNC ? 1 : 0) << 5)
46
47 #ifndef SMC_DEBUG
48 #define SMC_DEBUG ( SMC_DEBUG_RX | \
49 SMC_DEBUG_TX | \
50 SMC_DEBUG_DMA | \
51 SMC_DEBUG_PKTS | \
52 SMC_DEBUG_MISC | \
53 SMC_DEBUG_FUNC \
54 )
55 #endif
56
57 #include <linux/module.h>
58 #include <linux/kernel.h>
59 #include <linux/sched.h>
60 #include <linux/delay.h>
61 #include <linux/interrupt.h>
62 #include <linux/errno.h>
63 #include <linux/ioport.h>
64 #include <linux/crc32.h>
65 #include <linux/device.h>
66 #include <linux/platform_device.h>
67 #include <linux/spinlock.h>
68 #include <linux/ethtool.h>
69 #include <linux/mii.h>
70 #include <linux/workqueue.h>
71
72 #include <linux/netdevice.h>
73 #include <linux/etherdevice.h>
74 #include <linux/skbuff.h>
75
76 #include <linux/dmaengine.h>
77
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, dev, args...) \
110 do { \
111 if (SMC_DEBUG & (n)) \
112 netdev_dbg(dev, args); \
113 } while (0)
114
115 #define PRINTK(dev, args...) netdev_info(dev, args)
116 #else
117 #define DBG(n, dev, args...) do { } while (0)
118 #define PRINTK(dev, args...) netdev_dbg(dev, args)
119 #endif
120
121 #if SMC_DEBUG_PKTS > 0
PRINT_PKT(u_char * buf,int length)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 printk(KERN_DEBUG);
134 for (cur = 0; cur < 8; cur++) {
135 u_char a, b;
136 a = *buf++;
137 b = *buf++;
138 pr_cont("%02x%02x ", a, b);
139 }
140 pr_cont("\n");
141 }
142 printk(KERN_DEBUG);
143 for (i = 0; i < remainder/2 ; i++) {
144 u_char a, b;
145 a = *buf++;
146 b = *buf++;
147 pr_cont("%02x%02x ", a, b);
148 }
149 pr_cont("\n");
150 }
151 #else
152 #define PRINT_PKT(x...) do { } while (0)
153 #endif
154
155
156 /* this enables an interrupt in the interrupt mask register */
157 #define SMC_ENABLE_INT(lp, x) do { \
158 unsigned int __mask; \
159 __mask = SMC_GET_INT_EN((lp)); \
160 __mask |= (x); \
161 SMC_SET_INT_EN((lp), __mask); \
162 } while (0)
163
164 /* this disables an interrupt from the interrupt mask register */
165 #define SMC_DISABLE_INT(lp, x) do { \
166 unsigned int __mask; \
167 __mask = SMC_GET_INT_EN((lp)); \
168 __mask &= ~(x); \
169 SMC_SET_INT_EN((lp), __mask); \
170 } while (0)
171
172 /*
173 * this does a soft reset on the device
174 */
smc911x_reset(struct net_device * dev)175 static void smc911x_reset(struct net_device *dev)
176 {
177 struct smc911x_local *lp = netdev_priv(dev);
178 unsigned int reg, timeout=0, resets=1, irq_cfg;
179 unsigned long flags;
180
181 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
182
183 /* Take out of PM setting first */
184 if ((SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_) == 0) {
185 /* Write to the bytetest will take out of powerdown */
186 SMC_SET_BYTE_TEST(lp, 0);
187 timeout=10;
188 do {
189 udelay(10);
190 reg = SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_;
191 } while (--timeout && !reg);
192 if (timeout == 0) {
193 PRINTK(dev, "smc911x_reset timeout waiting for PM restore\n");
194 return;
195 }
196 }
197
198 /* Disable all interrupts */
199 spin_lock_irqsave(&lp->lock, flags);
200 SMC_SET_INT_EN(lp, 0);
201 spin_unlock_irqrestore(&lp->lock, flags);
202
203 while (resets--) {
204 SMC_SET_HW_CFG(lp, HW_CFG_SRST_);
205 timeout=10;
206 do {
207 udelay(10);
208 reg = SMC_GET_HW_CFG(lp);
209 /* If chip indicates reset timeout then try again */
210 if (reg & HW_CFG_SRST_TO_) {
211 PRINTK(dev, "chip reset timeout, retrying...\n");
212 resets++;
213 break;
214 }
215 } while (--timeout && (reg & HW_CFG_SRST_));
216 }
217 if (timeout == 0) {
218 PRINTK(dev, "smc911x_reset timeout waiting for reset\n");
219 return;
220 }
221
222 /* make sure EEPROM has finished loading before setting GPIO_CFG */
223 timeout=1000;
224 while (--timeout && (SMC_GET_E2P_CMD(lp) & E2P_CMD_EPC_BUSY_))
225 udelay(10);
226
227 if (timeout == 0){
228 PRINTK(dev, "smc911x_reset timeout waiting for EEPROM busy\n");
229 return;
230 }
231
232 /* Initialize interrupts */
233 SMC_SET_INT_EN(lp, 0);
234 SMC_ACK_INT(lp, -1);
235
236 /* Reset the FIFO level and flow control settings */
237 SMC_SET_HW_CFG(lp, (lp->tx_fifo_kb & 0xF) << 16);
238 //TODO: Figure out what appropriate pause time is
239 SMC_SET_FLOW(lp, FLOW_FCPT_ | FLOW_FCEN_);
240 SMC_SET_AFC_CFG(lp, lp->afc_cfg);
241
242
243 /* Set to LED outputs */
244 SMC_SET_GPIO_CFG(lp, 0x70070000);
245
246 /*
247 * Deassert IRQ for 1*10us for edge type interrupts
248 * and drive IRQ pin push-pull
249 */
250 irq_cfg = (1 << 24) | INT_CFG_IRQ_EN_ | INT_CFG_IRQ_TYPE_;
251 #ifdef SMC_DYNAMIC_BUS_CONFIG
252 if (lp->cfg.irq_polarity)
253 irq_cfg |= INT_CFG_IRQ_POL_;
254 #endif
255 SMC_SET_IRQ_CFG(lp, irq_cfg);
256
257 /* clear anything saved */
258 if (lp->pending_tx_skb != NULL) {
259 dev_kfree_skb (lp->pending_tx_skb);
260 lp->pending_tx_skb = NULL;
261 dev->stats.tx_errors++;
262 dev->stats.tx_aborted_errors++;
263 }
264 }
265
266 /*
267 * Enable Interrupts, Receive, and Transmit
268 */
smc911x_enable(struct net_device * dev)269 static void smc911x_enable(struct net_device *dev)
270 {
271 struct smc911x_local *lp = netdev_priv(dev);
272 unsigned mask, cfg, cr;
273 unsigned long flags;
274
275 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
276
277 spin_lock_irqsave(&lp->lock, flags);
278
279 SMC_SET_MAC_ADDR(lp, dev->dev_addr);
280
281 /* Enable TX */
282 cfg = SMC_GET_HW_CFG(lp);
283 cfg &= HW_CFG_TX_FIF_SZ_ | 0xFFF;
284 cfg |= HW_CFG_SF_;
285 SMC_SET_HW_CFG(lp, cfg);
286 SMC_SET_FIFO_TDA(lp, 0xFF);
287 /* Update TX stats on every 64 packets received or every 1 sec */
288 SMC_SET_FIFO_TSL(lp, 64);
289 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
290
291 SMC_GET_MAC_CR(lp, cr);
292 cr |= MAC_CR_TXEN_ | MAC_CR_HBDIS_;
293 SMC_SET_MAC_CR(lp, cr);
294 SMC_SET_TX_CFG(lp, TX_CFG_TX_ON_);
295
296 /* Add 2 byte padding to start of packets */
297 SMC_SET_RX_CFG(lp, (2<<8) & RX_CFG_RXDOFF_);
298
299 /* Turn on receiver and enable RX */
300 if (cr & MAC_CR_RXEN_)
301 DBG(SMC_DEBUG_RX, dev, "Receiver already enabled\n");
302
303 SMC_SET_MAC_CR(lp, cr | MAC_CR_RXEN_);
304
305 /* Interrupt on every received packet */
306 SMC_SET_FIFO_RSA(lp, 0x01);
307 SMC_SET_FIFO_RSL(lp, 0x00);
308
309 /* now, enable interrupts */
310 mask = INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_ | INT_EN_RSFL_EN_ |
311 INT_EN_GPT_INT_EN_ | INT_EN_RXDFH_INT_EN_ | INT_EN_RXE_EN_ |
312 INT_EN_PHY_INT_EN_;
313 if (IS_REV_A(lp->revision))
314 mask|=INT_EN_RDFL_EN_;
315 else {
316 mask|=INT_EN_RDFO_EN_;
317 }
318 SMC_ENABLE_INT(lp, mask);
319
320 spin_unlock_irqrestore(&lp->lock, flags);
321 }
322
323 /*
324 * this puts the device in an inactive state
325 */
smc911x_shutdown(struct net_device * dev)326 static void smc911x_shutdown(struct net_device *dev)
327 {
328 struct smc911x_local *lp = netdev_priv(dev);
329 unsigned cr;
330 unsigned long flags;
331
332 DBG(SMC_DEBUG_FUNC, dev, "%s: --> %s\n", CARDNAME, __func__);
333
334 /* Disable IRQ's */
335 SMC_SET_INT_EN(lp, 0);
336
337 /* Turn of Rx and TX */
338 spin_lock_irqsave(&lp->lock, flags);
339 SMC_GET_MAC_CR(lp, cr);
340 cr &= ~(MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
341 SMC_SET_MAC_CR(lp, cr);
342 SMC_SET_TX_CFG(lp, TX_CFG_STOP_TX_);
343 spin_unlock_irqrestore(&lp->lock, flags);
344 }
345
smc911x_drop_pkt(struct net_device * dev)346 static inline void smc911x_drop_pkt(struct net_device *dev)
347 {
348 struct smc911x_local *lp = netdev_priv(dev);
349 unsigned int fifo_count, timeout, reg;
350
351 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, dev, "%s: --> %s\n",
352 CARDNAME, __func__);
353 fifo_count = SMC_GET_RX_FIFO_INF(lp) & 0xFFFF;
354 if (fifo_count <= 4) {
355 /* Manually dump the packet data */
356 while (fifo_count--)
357 SMC_GET_RX_FIFO(lp);
358 } else {
359 /* Fast forward through the bad packet */
360 SMC_SET_RX_DP_CTRL(lp, RX_DP_CTRL_FFWD_BUSY_);
361 timeout=50;
362 do {
363 udelay(10);
364 reg = SMC_GET_RX_DP_CTRL(lp) & RX_DP_CTRL_FFWD_BUSY_;
365 } while (--timeout && reg);
366 if (timeout == 0) {
367 PRINTK(dev, "timeout waiting for RX fast forward\n");
368 }
369 }
370 }
371
372 /*
373 * This is the procedure to handle the receipt of a packet.
374 * It should be called after checking for packet presence in
375 * the RX status FIFO. It must be called with the spin lock
376 * already held.
377 */
smc911x_rcv(struct net_device * dev)378 static inline void smc911x_rcv(struct net_device *dev)
379 {
380 struct smc911x_local *lp = netdev_priv(dev);
381 unsigned int pkt_len, status;
382 struct sk_buff *skb;
383 unsigned char *data;
384
385 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, dev, "--> %s\n",
386 __func__);
387 status = SMC_GET_RX_STS_FIFO(lp);
388 DBG(SMC_DEBUG_RX, dev, "Rx pkt len %d status 0x%08x\n",
389 (status & 0x3fff0000) >> 16, status & 0xc000ffff);
390 pkt_len = (status & RX_STS_PKT_LEN_) >> 16;
391 if (status & RX_STS_ES_) {
392 /* Deal with a bad packet */
393 dev->stats.rx_errors++;
394 if (status & RX_STS_CRC_ERR_)
395 dev->stats.rx_crc_errors++;
396 else {
397 if (status & RX_STS_LEN_ERR_)
398 dev->stats.rx_length_errors++;
399 if (status & RX_STS_MCAST_)
400 dev->stats.multicast++;
401 }
402 /* Remove the bad packet data from the RX FIFO */
403 smc911x_drop_pkt(dev);
404 } else {
405 /* Receive a valid packet */
406 /* Alloc a buffer with extra room for DMA alignment */
407 skb = netdev_alloc_skb(dev, pkt_len+32);
408 if (unlikely(skb == NULL)) {
409 PRINTK(dev, "Low memory, rcvd packet dropped.\n");
410 dev->stats.rx_dropped++;
411 smc911x_drop_pkt(dev);
412 return;
413 }
414 /* Align IP header to 32 bits
415 * Note that the device is configured to add a 2
416 * byte padding to the packet start, so we really
417 * want to write to the orignal data pointer */
418 data = skb->data;
419 skb_reserve(skb, 2);
420 skb_put(skb,pkt_len-4);
421 #ifdef SMC_USE_DMA
422 {
423 unsigned int fifo;
424 /* Lower the FIFO threshold if possible */
425 fifo = SMC_GET_FIFO_INT(lp);
426 if (fifo & 0xFF) fifo--;
427 DBG(SMC_DEBUG_RX, dev, "Setting RX stat FIFO threshold to %d\n",
428 fifo & 0xff);
429 SMC_SET_FIFO_INT(lp, fifo);
430 /* Setup RX DMA */
431 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN16_ | ((2<<8) & RX_CFG_RXDOFF_));
432 lp->rxdma_active = 1;
433 lp->current_rx_skb = skb;
434 SMC_PULL_DATA(lp, data, (pkt_len+2+15) & ~15);
435 /* Packet processing deferred to DMA RX interrupt */
436 }
437 #else
438 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN4_ | ((2<<8) & RX_CFG_RXDOFF_));
439 SMC_PULL_DATA(lp, data, pkt_len+2+3);
440
441 DBG(SMC_DEBUG_PKTS, dev, "Received packet\n");
442 PRINT_PKT(data, ((pkt_len - 4) <= 64) ? pkt_len - 4 : 64);
443 skb->protocol = eth_type_trans(skb, dev);
444 netif_rx(skb);
445 dev->stats.rx_packets++;
446 dev->stats.rx_bytes += pkt_len-4;
447 #endif
448 }
449 }
450
451 /*
452 * This is called to actually send a packet to the chip.
453 */
smc911x_hardware_send_pkt(struct net_device * dev)454 static void smc911x_hardware_send_pkt(struct net_device *dev)
455 {
456 struct smc911x_local *lp = netdev_priv(dev);
457 struct sk_buff *skb;
458 unsigned int cmdA, cmdB, len;
459 unsigned char *buf;
460
461 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n", __func__);
462 BUG_ON(lp->pending_tx_skb == NULL);
463
464 skb = lp->pending_tx_skb;
465 lp->pending_tx_skb = NULL;
466
467 /* cmdA {25:24] data alignment [20:16] start offset [10:0] buffer length */
468 /* cmdB {31:16] pkt tag [10:0] length */
469 #ifdef SMC_USE_DMA
470 /* 16 byte buffer alignment mode */
471 buf = (char*)((u32)(skb->data) & ~0xF);
472 len = (skb->len + 0xF + ((u32)skb->data & 0xF)) & ~0xF;
473 cmdA = (1<<24) | (((u32)skb->data & 0xF)<<16) |
474 TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
475 skb->len;
476 #else
477 buf = (char*)((u32)skb->data & ~0x3);
478 len = (skb->len + 3 + ((u32)skb->data & 3)) & ~0x3;
479 cmdA = (((u32)skb->data & 0x3) << 16) |
480 TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
481 skb->len;
482 #endif
483 /* tag is packet length so we can use this in stats update later */
484 cmdB = (skb->len << 16) | (skb->len & 0x7FF);
485
486 DBG(SMC_DEBUG_TX, dev, "TX PKT LENGTH 0x%04x (%d) BUF 0x%p CMDA 0x%08x CMDB 0x%08x\n",
487 len, len, buf, cmdA, cmdB);
488 SMC_SET_TX_FIFO(lp, cmdA);
489 SMC_SET_TX_FIFO(lp, cmdB);
490
491 DBG(SMC_DEBUG_PKTS, dev, "Transmitted packet\n");
492 PRINT_PKT(buf, len <= 64 ? len : 64);
493
494 /* Send pkt via PIO or DMA */
495 #ifdef SMC_USE_DMA
496 lp->current_tx_skb = skb;
497 SMC_PUSH_DATA(lp, buf, len);
498 /* DMA complete IRQ will free buffer and set jiffies */
499 #else
500 SMC_PUSH_DATA(lp, buf, len);
501 netif_trans_update(dev);
502 dev_kfree_skb_irq(skb);
503 #endif
504 if (!lp->tx_throttle) {
505 netif_wake_queue(dev);
506 }
507 SMC_ENABLE_INT(lp, INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_);
508 }
509
510 /*
511 * Since I am not sure if I will have enough room in the chip's ram
512 * to store the packet, I call this routine which either sends it
513 * now, or set the card to generates an interrupt when ready
514 * for the packet.
515 */
516 static netdev_tx_t
smc911x_hard_start_xmit(struct sk_buff * skb,struct net_device * dev)517 smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
518 {
519 struct smc911x_local *lp = netdev_priv(dev);
520 unsigned int free;
521 unsigned long flags;
522
523 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
524 __func__);
525
526 spin_lock_irqsave(&lp->lock, flags);
527
528 BUG_ON(lp->pending_tx_skb != NULL);
529
530 free = SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TDFREE_;
531 DBG(SMC_DEBUG_TX, dev, "TX free space %d\n", free);
532
533 /* Turn off the flow when running out of space in FIFO */
534 if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
535 DBG(SMC_DEBUG_TX, dev, "Disabling data flow due to low FIFO space (%d)\n",
536 free);
537 /* Reenable when at least 1 packet of size MTU present */
538 SMC_SET_FIFO_TDA(lp, (SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
539 lp->tx_throttle = 1;
540 netif_stop_queue(dev);
541 }
542
543 /* Drop packets when we run out of space in TX FIFO
544 * Account for overhead required for:
545 *
546 * Tx command words 8 bytes
547 * Start offset 15 bytes
548 * End padding 15 bytes
549 */
550 if (unlikely(free < (skb->len + 8 + 15 + 15))) {
551 netdev_warn(dev, "No Tx free space %d < %d\n",
552 free, skb->len);
553 lp->pending_tx_skb = NULL;
554 dev->stats.tx_errors++;
555 dev->stats.tx_dropped++;
556 spin_unlock_irqrestore(&lp->lock, flags);
557 dev_kfree_skb_any(skb);
558 return NETDEV_TX_OK;
559 }
560
561 #ifdef SMC_USE_DMA
562 {
563 /* If the DMA is already running then defer this packet Tx until
564 * the DMA IRQ starts it
565 */
566 if (lp->txdma_active) {
567 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Tx DMA running, deferring packet\n");
568 lp->pending_tx_skb = skb;
569 netif_stop_queue(dev);
570 spin_unlock_irqrestore(&lp->lock, flags);
571 return NETDEV_TX_OK;
572 } else {
573 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Activating Tx DMA\n");
574 lp->txdma_active = 1;
575 }
576 }
577 #endif
578 lp->pending_tx_skb = skb;
579 smc911x_hardware_send_pkt(dev);
580 spin_unlock_irqrestore(&lp->lock, flags);
581
582 return NETDEV_TX_OK;
583 }
584
585 /*
586 * This handles a TX status interrupt, which is only called when:
587 * - a TX error occurred, or
588 * - TX of a packet completed.
589 */
smc911x_tx(struct net_device * dev)590 static void smc911x_tx(struct net_device *dev)
591 {
592 struct smc911x_local *lp = netdev_priv(dev);
593 unsigned int tx_status;
594
595 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
596 __func__);
597
598 /* Collect the TX status */
599 while (((SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
600 DBG(SMC_DEBUG_TX, dev, "Tx stat FIFO used 0x%04x\n",
601 (SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16);
602 tx_status = SMC_GET_TX_STS_FIFO(lp);
603 dev->stats.tx_packets++;
604 dev->stats.tx_bytes+=tx_status>>16;
605 DBG(SMC_DEBUG_TX, dev, "Tx FIFO tag 0x%04x status 0x%04x\n",
606 (tx_status & 0xffff0000) >> 16,
607 tx_status & 0x0000ffff);
608 /* count Tx errors, but ignore lost carrier errors when in
609 * full-duplex mode */
610 if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
611 !(tx_status & 0x00000306))) {
612 dev->stats.tx_errors++;
613 }
614 if (tx_status & TX_STS_MANY_COLL_) {
615 dev->stats.collisions+=16;
616 dev->stats.tx_aborted_errors++;
617 } else {
618 dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
619 }
620 /* carrier error only has meaning for half-duplex communication */
621 if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
622 !lp->ctl_rfduplx) {
623 dev->stats.tx_carrier_errors++;
624 }
625 if (tx_status & TX_STS_LATE_COLL_) {
626 dev->stats.collisions++;
627 dev->stats.tx_aborted_errors++;
628 }
629 }
630 }
631
632
633 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
634 /*
635 * Reads a register from the MII Management serial interface
636 */
637
smc911x_phy_read(struct net_device * dev,int phyaddr,int phyreg)638 static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
639 {
640 struct smc911x_local *lp = netdev_priv(dev);
641 unsigned int phydata;
642
643 SMC_GET_MII(lp, phyreg, phyaddr, phydata);
644
645 DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
646 __func__, phyaddr, phyreg, phydata);
647 return phydata;
648 }
649
650
651 /*
652 * Writes a register to the MII Management serial interface
653 */
smc911x_phy_write(struct net_device * dev,int phyaddr,int phyreg,int phydata)654 static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
655 int phydata)
656 {
657 struct smc911x_local *lp = netdev_priv(dev);
658
659 DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
660 __func__, phyaddr, phyreg, phydata);
661
662 SMC_SET_MII(lp, phyreg, phyaddr, phydata);
663 }
664
665 /*
666 * Finds and reports the PHY address (115 and 117 have external
667 * PHY interface 118 has internal only
668 */
smc911x_phy_detect(struct net_device * dev)669 static void smc911x_phy_detect(struct net_device *dev)
670 {
671 struct smc911x_local *lp = netdev_priv(dev);
672 int phyaddr;
673 unsigned int cfg, id1, id2;
674
675 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
676
677 lp->phy_type = 0;
678
679 /*
680 * Scan all 32 PHY addresses if necessary, starting at
681 * PHY#1 to PHY#31, and then PHY#0 last.
682 */
683 switch(lp->version) {
684 case CHIP_9115:
685 case CHIP_9117:
686 case CHIP_9215:
687 case CHIP_9217:
688 cfg = SMC_GET_HW_CFG(lp);
689 if (cfg & HW_CFG_EXT_PHY_DET_) {
690 cfg &= ~HW_CFG_PHY_CLK_SEL_;
691 cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
692 SMC_SET_HW_CFG(lp, cfg);
693 udelay(10); /* Wait for clocks to stop */
694
695 cfg |= HW_CFG_EXT_PHY_EN_;
696 SMC_SET_HW_CFG(lp, cfg);
697 udelay(10); /* Wait for clocks to stop */
698
699 cfg &= ~HW_CFG_PHY_CLK_SEL_;
700 cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
701 SMC_SET_HW_CFG(lp, cfg);
702 udelay(10); /* Wait for clocks to stop */
703
704 cfg |= HW_CFG_SMI_SEL_;
705 SMC_SET_HW_CFG(lp, cfg);
706
707 for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
708
709 /* Read the PHY identifiers */
710 SMC_GET_PHY_ID1(lp, phyaddr & 31, id1);
711 SMC_GET_PHY_ID2(lp, phyaddr & 31, id2);
712
713 /* Make sure it is a valid identifier */
714 if (id1 != 0x0000 && id1 != 0xffff &&
715 id1 != 0x8000 && id2 != 0x0000 &&
716 id2 != 0xffff && id2 != 0x8000) {
717 /* Save the PHY's address */
718 lp->mii.phy_id = phyaddr & 31;
719 lp->phy_type = id1 << 16 | id2;
720 break;
721 }
722 }
723 if (phyaddr < 32)
724 /* Found an external PHY */
725 break;
726 }
727 default:
728 /* Internal media only */
729 SMC_GET_PHY_ID1(lp, 1, id1);
730 SMC_GET_PHY_ID2(lp, 1, id2);
731 /* Save the PHY's address */
732 lp->mii.phy_id = 1;
733 lp->phy_type = id1 << 16 | id2;
734 }
735
736 DBG(SMC_DEBUG_MISC, dev, "phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%x\n",
737 id1, id2, lp->mii.phy_id);
738 }
739
740 /*
741 * Sets the PHY to a configuration as determined by the user.
742 * Called with spin_lock held.
743 */
smc911x_phy_fixed(struct net_device * dev)744 static int smc911x_phy_fixed(struct net_device *dev)
745 {
746 struct smc911x_local *lp = netdev_priv(dev);
747 int phyaddr = lp->mii.phy_id;
748 int bmcr;
749
750 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
751
752 /* Enter Link Disable state */
753 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
754 bmcr |= BMCR_PDOWN;
755 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
756
757 /*
758 * Set our fixed capabilities
759 * Disable auto-negotiation
760 */
761 bmcr &= ~BMCR_ANENABLE;
762 if (lp->ctl_rfduplx)
763 bmcr |= BMCR_FULLDPLX;
764
765 if (lp->ctl_rspeed == 100)
766 bmcr |= BMCR_SPEED100;
767
768 /* Write our capabilities to the phy control register */
769 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
770
771 /* Re-Configure the Receive/Phy Control register */
772 bmcr &= ~BMCR_PDOWN;
773 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
774
775 return 1;
776 }
777
778 /**
779 * smc911x_phy_reset - reset the phy
780 * @dev: net device
781 * @phy: phy address
782 *
783 * Issue a software reset for the specified PHY and
784 * wait up to 100ms for the reset to complete. We should
785 * not access the PHY for 50ms after issuing the reset.
786 *
787 * The time to wait appears to be dependent on the PHY.
788 *
789 */
smc911x_phy_reset(struct net_device * dev,int phy)790 static int smc911x_phy_reset(struct net_device *dev, int phy)
791 {
792 struct smc911x_local *lp = netdev_priv(dev);
793 int timeout;
794 unsigned long flags;
795 unsigned int reg;
796
797 DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
798
799 spin_lock_irqsave(&lp->lock, flags);
800 reg = SMC_GET_PMT_CTRL(lp);
801 reg &= ~0xfffff030;
802 reg |= PMT_CTRL_PHY_RST_;
803 SMC_SET_PMT_CTRL(lp, reg);
804 spin_unlock_irqrestore(&lp->lock, flags);
805 for (timeout = 2; timeout; timeout--) {
806 msleep(50);
807 spin_lock_irqsave(&lp->lock, flags);
808 reg = SMC_GET_PMT_CTRL(lp);
809 spin_unlock_irqrestore(&lp->lock, flags);
810 if (!(reg & PMT_CTRL_PHY_RST_)) {
811 /* extra delay required because the phy may
812 * not be completed with its reset
813 * when PHY_BCR_RESET_ is cleared. 256us
814 * should suffice, but use 500us to be safe
815 */
816 udelay(500);
817 break;
818 }
819 }
820
821 return reg & PMT_CTRL_PHY_RST_;
822 }
823
824 /**
825 * smc911x_phy_powerdown - powerdown phy
826 * @dev: net device
827 * @phy: phy address
828 *
829 * Power down the specified PHY
830 */
smc911x_phy_powerdown(struct net_device * dev,int phy)831 static void smc911x_phy_powerdown(struct net_device *dev, int phy)
832 {
833 struct smc911x_local *lp = netdev_priv(dev);
834 unsigned int bmcr;
835
836 /* Enter Link Disable state */
837 SMC_GET_PHY_BMCR(lp, phy, bmcr);
838 bmcr |= BMCR_PDOWN;
839 SMC_SET_PHY_BMCR(lp, phy, bmcr);
840 }
841
842 /**
843 * smc911x_phy_check_media - check the media status and adjust BMCR
844 * @dev: net device
845 * @init: set true for initialisation
846 *
847 * Select duplex mode depending on negotiation state. This
848 * also updates our carrier state.
849 */
smc911x_phy_check_media(struct net_device * dev,int init)850 static void smc911x_phy_check_media(struct net_device *dev, int init)
851 {
852 struct smc911x_local *lp = netdev_priv(dev);
853 int phyaddr = lp->mii.phy_id;
854 unsigned int bmcr, cr;
855
856 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
857
858 if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
859 /* duplex state has changed */
860 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
861 SMC_GET_MAC_CR(lp, cr);
862 if (lp->mii.full_duplex) {
863 DBG(SMC_DEBUG_MISC, dev, "Configuring for full-duplex mode\n");
864 bmcr |= BMCR_FULLDPLX;
865 cr |= MAC_CR_RCVOWN_;
866 } else {
867 DBG(SMC_DEBUG_MISC, dev, "Configuring for half-duplex mode\n");
868 bmcr &= ~BMCR_FULLDPLX;
869 cr &= ~MAC_CR_RCVOWN_;
870 }
871 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
872 SMC_SET_MAC_CR(lp, cr);
873 }
874 }
875
876 /*
877 * Configures the specified PHY through the MII management interface
878 * using Autonegotiation.
879 * Calls smc911x_phy_fixed() if the user has requested a certain config.
880 * If RPC ANEG bit is set, the media selection is dependent purely on
881 * the selection by the MII (either in the MII BMCR reg or the result
882 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
883 * is controlled by the RPC SPEED and RPC DPLX bits.
884 */
smc911x_phy_configure(struct work_struct * work)885 static void smc911x_phy_configure(struct work_struct *work)
886 {
887 struct smc911x_local *lp = container_of(work, struct smc911x_local,
888 phy_configure);
889 struct net_device *dev = lp->netdev;
890 int phyaddr = lp->mii.phy_id;
891 int my_phy_caps; /* My PHY capabilities */
892 int my_ad_caps; /* My Advertised capabilities */
893 int status;
894 unsigned long flags;
895
896 DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
897
898 /*
899 * We should not be called if phy_type is zero.
900 */
901 if (lp->phy_type == 0)
902 return;
903
904 if (smc911x_phy_reset(dev, phyaddr)) {
905 netdev_info(dev, "PHY reset timed out\n");
906 return;
907 }
908 spin_lock_irqsave(&lp->lock, flags);
909
910 /*
911 * Enable PHY Interrupts (for register 18)
912 * Interrupts listed here are enabled
913 */
914 SMC_SET_PHY_INT_MASK(lp, phyaddr, PHY_INT_MASK_ENERGY_ON_ |
915 PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
916 PHY_INT_MASK_LINK_DOWN_);
917
918 /* If the user requested no auto neg, then go set his request */
919 if (lp->mii.force_media) {
920 smc911x_phy_fixed(dev);
921 goto smc911x_phy_configure_exit;
922 }
923
924 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
925 SMC_GET_PHY_BMSR(lp, phyaddr, my_phy_caps);
926 if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
927 netdev_info(dev, "Auto negotiation NOT supported\n");
928 smc911x_phy_fixed(dev);
929 goto smc911x_phy_configure_exit;
930 }
931
932 /* CSMA capable w/ both pauses */
933 my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
934
935 if (my_phy_caps & BMSR_100BASE4)
936 my_ad_caps |= ADVERTISE_100BASE4;
937 if (my_phy_caps & BMSR_100FULL)
938 my_ad_caps |= ADVERTISE_100FULL;
939 if (my_phy_caps & BMSR_100HALF)
940 my_ad_caps |= ADVERTISE_100HALF;
941 if (my_phy_caps & BMSR_10FULL)
942 my_ad_caps |= ADVERTISE_10FULL;
943 if (my_phy_caps & BMSR_10HALF)
944 my_ad_caps |= ADVERTISE_10HALF;
945
946 /* Disable capabilities not selected by our user */
947 if (lp->ctl_rspeed != 100)
948 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
949
950 if (!lp->ctl_rfduplx)
951 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
952
953 /* Update our Auto-Neg Advertisement Register */
954 SMC_SET_PHY_MII_ADV(lp, phyaddr, my_ad_caps);
955 lp->mii.advertising = my_ad_caps;
956
957 /*
958 * Read the register back. Without this, it appears that when
959 * auto-negotiation is restarted, sometimes it isn't ready and
960 * the link does not come up.
961 */
962 udelay(10);
963 SMC_GET_PHY_MII_ADV(lp, phyaddr, status);
964
965 DBG(SMC_DEBUG_MISC, dev, "phy caps=0x%04x\n", my_phy_caps);
966 DBG(SMC_DEBUG_MISC, dev, "phy advertised caps=0x%04x\n", my_ad_caps);
967
968 /* Restart auto-negotiation process in order to advertise my caps */
969 SMC_SET_PHY_BMCR(lp, phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
970
971 smc911x_phy_check_media(dev, 1);
972
973 smc911x_phy_configure_exit:
974 spin_unlock_irqrestore(&lp->lock, flags);
975 }
976
977 /*
978 * smc911x_phy_interrupt
979 *
980 * Purpose: Handle interrupts relating to PHY register 18. This is
981 * called from the "hard" interrupt handler under our private spinlock.
982 */
smc911x_phy_interrupt(struct net_device * dev)983 static void smc911x_phy_interrupt(struct net_device *dev)
984 {
985 struct smc911x_local *lp = netdev_priv(dev);
986 int phyaddr = lp->mii.phy_id;
987 int status;
988
989 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
990
991 if (lp->phy_type == 0)
992 return;
993
994 smc911x_phy_check_media(dev, 0);
995 /* read to clear status bits */
996 SMC_GET_PHY_INT_SRC(lp, phyaddr,status);
997 DBG(SMC_DEBUG_MISC, dev, "PHY interrupt status 0x%04x\n",
998 status & 0xffff);
999 DBG(SMC_DEBUG_MISC, dev, "AFC_CFG 0x%08x\n",
1000 SMC_GET_AFC_CFG(lp));
1001 }
1002
1003 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1004
1005 /*
1006 * This is the main routine of the driver, to handle the device when
1007 * it needs some attention.
1008 */
smc911x_interrupt(int irq,void * dev_id)1009 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1010 {
1011 struct net_device *dev = dev_id;
1012 struct smc911x_local *lp = netdev_priv(dev);
1013 unsigned int status, mask, timeout;
1014 unsigned int rx_overrun=0, cr, pkts;
1015 unsigned long flags;
1016
1017 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1018
1019 spin_lock_irqsave(&lp->lock, flags);
1020
1021 /* Spurious interrupt check */
1022 if ((SMC_GET_IRQ_CFG(lp) & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1023 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1024 spin_unlock_irqrestore(&lp->lock, flags);
1025 return IRQ_NONE;
1026 }
1027
1028 mask = SMC_GET_INT_EN(lp);
1029 SMC_SET_INT_EN(lp, 0);
1030
1031 /* set a timeout value, so I don't stay here forever */
1032 timeout = 8;
1033
1034
1035 do {
1036 status = SMC_GET_INT(lp);
1037
1038 DBG(SMC_DEBUG_MISC, dev, "INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1039 status, mask, status & ~mask);
1040
1041 status &= mask;
1042 if (!status)
1043 break;
1044
1045 /* Handle SW interrupt condition */
1046 if (status & INT_STS_SW_INT_) {
1047 SMC_ACK_INT(lp, INT_STS_SW_INT_);
1048 mask &= ~INT_EN_SW_INT_EN_;
1049 }
1050 /* Handle various error conditions */
1051 if (status & INT_STS_RXE_) {
1052 SMC_ACK_INT(lp, INT_STS_RXE_);
1053 dev->stats.rx_errors++;
1054 }
1055 if (status & INT_STS_RXDFH_INT_) {
1056 SMC_ACK_INT(lp, INT_STS_RXDFH_INT_);
1057 dev->stats.rx_dropped+=SMC_GET_RX_DROP(lp);
1058 }
1059 /* Undocumented interrupt-what is the right thing to do here? */
1060 if (status & INT_STS_RXDF_INT_) {
1061 SMC_ACK_INT(lp, INT_STS_RXDF_INT_);
1062 }
1063
1064 /* Rx Data FIFO exceeds set level */
1065 if (status & INT_STS_RDFL_) {
1066 if (IS_REV_A(lp->revision)) {
1067 rx_overrun=1;
1068 SMC_GET_MAC_CR(lp, cr);
1069 cr &= ~MAC_CR_RXEN_;
1070 SMC_SET_MAC_CR(lp, cr);
1071 DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1072 dev->stats.rx_errors++;
1073 dev->stats.rx_fifo_errors++;
1074 }
1075 SMC_ACK_INT(lp, INT_STS_RDFL_);
1076 }
1077 if (status & INT_STS_RDFO_) {
1078 if (!IS_REV_A(lp->revision)) {
1079 SMC_GET_MAC_CR(lp, cr);
1080 cr &= ~MAC_CR_RXEN_;
1081 SMC_SET_MAC_CR(lp, cr);
1082 rx_overrun=1;
1083 DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1084 dev->stats.rx_errors++;
1085 dev->stats.rx_fifo_errors++;
1086 }
1087 SMC_ACK_INT(lp, INT_STS_RDFO_);
1088 }
1089 /* Handle receive condition */
1090 if ((status & INT_STS_RSFL_) || rx_overrun) {
1091 unsigned int fifo;
1092 DBG(SMC_DEBUG_RX, dev, "RX irq\n");
1093 fifo = SMC_GET_RX_FIFO_INF(lp);
1094 pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1095 DBG(SMC_DEBUG_RX, dev, "Rx FIFO pkts %d, bytes %d\n",
1096 pkts, fifo & 0xFFFF);
1097 if (pkts != 0) {
1098 #ifdef SMC_USE_DMA
1099 unsigned int fifo;
1100 if (lp->rxdma_active){
1101 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1102 "RX DMA active\n");
1103 /* The DMA is already running so up the IRQ threshold */
1104 fifo = SMC_GET_FIFO_INT(lp) & ~0xFF;
1105 fifo |= pkts & 0xFF;
1106 DBG(SMC_DEBUG_RX, dev,
1107 "Setting RX stat FIFO threshold to %d\n",
1108 fifo & 0xff);
1109 SMC_SET_FIFO_INT(lp, fifo);
1110 } else
1111 #endif
1112 smc911x_rcv(dev);
1113 }
1114 SMC_ACK_INT(lp, INT_STS_RSFL_);
1115 }
1116 /* Handle transmit FIFO available */
1117 if (status & INT_STS_TDFA_) {
1118 DBG(SMC_DEBUG_TX, dev, "TX data FIFO space available irq\n");
1119 SMC_SET_FIFO_TDA(lp, 0xFF);
1120 lp->tx_throttle = 0;
1121 #ifdef SMC_USE_DMA
1122 if (!lp->txdma_active)
1123 #endif
1124 netif_wake_queue(dev);
1125 SMC_ACK_INT(lp, INT_STS_TDFA_);
1126 }
1127 /* Handle transmit done condition */
1128 #if 1
1129 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1130 DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC, dev,
1131 "Tx stat FIFO limit (%d) /GPT irq\n",
1132 (SMC_GET_FIFO_INT(lp) & 0x00ff0000) >> 16);
1133 smc911x_tx(dev);
1134 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1135 SMC_ACK_INT(lp, INT_STS_TSFL_);
1136 SMC_ACK_INT(lp, INT_STS_TSFL_ | INT_STS_GPT_INT_);
1137 }
1138 #else
1139 if (status & INT_STS_TSFL_) {
1140 DBG(SMC_DEBUG_TX, dev, "TX status FIFO limit (%d) irq\n", ?);
1141 smc911x_tx(dev);
1142 SMC_ACK_INT(lp, INT_STS_TSFL_);
1143 }
1144
1145 if (status & INT_STS_GPT_INT_) {
1146 DBG(SMC_DEBUG_RX, dev, "IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1147 SMC_GET_IRQ_CFG(lp),
1148 SMC_GET_FIFO_INT(lp),
1149 SMC_GET_RX_CFG(lp));
1150 DBG(SMC_DEBUG_RX, dev, "Rx Stat FIFO Used 0x%02x Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1151 (SMC_GET_RX_FIFO_INF(lp) & 0x00ff0000) >> 16,
1152 SMC_GET_RX_FIFO_INF(lp) & 0xffff,
1153 SMC_GET_RX_STS_FIFO_PEEK(lp));
1154 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1155 SMC_ACK_INT(lp, INT_STS_GPT_INT_);
1156 }
1157 #endif
1158
1159 /* Handle PHY interrupt condition */
1160 if (status & INT_STS_PHY_INT_) {
1161 DBG(SMC_DEBUG_MISC, dev, "PHY irq\n");
1162 smc911x_phy_interrupt(dev);
1163 SMC_ACK_INT(lp, INT_STS_PHY_INT_);
1164 }
1165 } while (--timeout);
1166
1167 /* restore mask state */
1168 SMC_SET_INT_EN(lp, mask);
1169
1170 DBG(SMC_DEBUG_MISC, dev, "Interrupt done (%d loops)\n",
1171 8-timeout);
1172
1173 spin_unlock_irqrestore(&lp->lock, flags);
1174
1175 return IRQ_HANDLED;
1176 }
1177
1178 #ifdef SMC_USE_DMA
1179 static void
smc911x_tx_dma_irq(void * data)1180 smc911x_tx_dma_irq(void *data)
1181 {
1182 struct smc911x_local *lp = data;
1183 struct net_device *dev = lp->netdev;
1184 struct sk_buff *skb = lp->current_tx_skb;
1185 unsigned long flags;
1186
1187 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1188
1189 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "TX DMA irq handler\n");
1190 BUG_ON(skb == NULL);
1191 dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1192 netif_trans_update(dev);
1193 dev_kfree_skb_irq(skb);
1194 lp->current_tx_skb = NULL;
1195 if (lp->pending_tx_skb != NULL)
1196 smc911x_hardware_send_pkt(dev);
1197 else {
1198 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev,
1199 "No pending Tx packets. DMA disabled\n");
1200 spin_lock_irqsave(&lp->lock, flags);
1201 lp->txdma_active = 0;
1202 if (!lp->tx_throttle) {
1203 netif_wake_queue(dev);
1204 }
1205 spin_unlock_irqrestore(&lp->lock, flags);
1206 }
1207
1208 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev,
1209 "TX DMA irq completed\n");
1210 }
1211 static void
smc911x_rx_dma_irq(void * data)1212 smc911x_rx_dma_irq(void *data)
1213 {
1214 struct smc911x_local *lp = data;
1215 struct net_device *dev = lp->netdev;
1216 struct sk_buff *skb = lp->current_rx_skb;
1217 unsigned long flags;
1218 unsigned int pkts;
1219
1220 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1221 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev, "RX DMA irq handler\n");
1222 dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1223 BUG_ON(skb == NULL);
1224 lp->current_rx_skb = NULL;
1225 PRINT_PKT(skb->data, skb->len);
1226 skb->protocol = eth_type_trans(skb, dev);
1227 dev->stats.rx_packets++;
1228 dev->stats.rx_bytes += skb->len;
1229 netif_rx(skb);
1230
1231 spin_lock_irqsave(&lp->lock, flags);
1232 pkts = (SMC_GET_RX_FIFO_INF(lp) & RX_FIFO_INF_RXSUSED_) >> 16;
1233 if (pkts != 0) {
1234 smc911x_rcv(dev);
1235 }else {
1236 lp->rxdma_active = 0;
1237 }
1238 spin_unlock_irqrestore(&lp->lock, flags);
1239 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1240 "RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1241 pkts);
1242 }
1243 #endif /* SMC_USE_DMA */
1244
1245 #ifdef CONFIG_NET_POLL_CONTROLLER
1246 /*
1247 * Polling receive - used by netconsole and other diagnostic tools
1248 * to allow network i/o with interrupts disabled.
1249 */
smc911x_poll_controller(struct net_device * dev)1250 static void smc911x_poll_controller(struct net_device *dev)
1251 {
1252 disable_irq(dev->irq);
1253 smc911x_interrupt(dev->irq, dev);
1254 enable_irq(dev->irq);
1255 }
1256 #endif
1257
1258 /* Our watchdog timed out. Called by the networking layer */
smc911x_timeout(struct net_device * dev)1259 static void smc911x_timeout(struct net_device *dev)
1260 {
1261 struct smc911x_local *lp = netdev_priv(dev);
1262 int status, mask;
1263 unsigned long flags;
1264
1265 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1266
1267 spin_lock_irqsave(&lp->lock, flags);
1268 status = SMC_GET_INT(lp);
1269 mask = SMC_GET_INT_EN(lp);
1270 spin_unlock_irqrestore(&lp->lock, flags);
1271 DBG(SMC_DEBUG_MISC, dev, "INT 0x%02x MASK 0x%02x\n",
1272 status, mask);
1273
1274 /* Dump the current TX FIFO contents and restart */
1275 mask = SMC_GET_TX_CFG(lp);
1276 SMC_SET_TX_CFG(lp, mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1277 /*
1278 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1279 * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1280 * which calls schedule(). Hence we use a work queue.
1281 */
1282 if (lp->phy_type != 0)
1283 schedule_work(&lp->phy_configure);
1284
1285 /* We can accept TX packets again */
1286 netif_trans_update(dev); /* prevent tx timeout */
1287 netif_wake_queue(dev);
1288 }
1289
1290 /*
1291 * This routine will, depending on the values passed to it,
1292 * either make it accept multicast packets, go into
1293 * promiscuous mode (for TCPDUMP and cousins) or accept
1294 * a select set of multicast packets
1295 */
smc911x_set_multicast_list(struct net_device * dev)1296 static void smc911x_set_multicast_list(struct net_device *dev)
1297 {
1298 struct smc911x_local *lp = netdev_priv(dev);
1299 unsigned int multicast_table[2];
1300 unsigned int mcr, update_multicast = 0;
1301 unsigned long flags;
1302
1303 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1304
1305 spin_lock_irqsave(&lp->lock, flags);
1306 SMC_GET_MAC_CR(lp, mcr);
1307 spin_unlock_irqrestore(&lp->lock, flags);
1308
1309 if (dev->flags & IFF_PROMISC) {
1310
1311 DBG(SMC_DEBUG_MISC, dev, "RCR_PRMS\n");
1312 mcr |= MAC_CR_PRMS_;
1313 }
1314 /*
1315 * Here, I am setting this to accept all multicast packets.
1316 * I don't need to zero the multicast table, because the flag is
1317 * checked before the table is
1318 */
1319 else if (dev->flags & IFF_ALLMULTI || netdev_mc_count(dev) > 16) {
1320 DBG(SMC_DEBUG_MISC, dev, "RCR_ALMUL\n");
1321 mcr |= MAC_CR_MCPAS_;
1322 }
1323
1324 /*
1325 * This sets the internal hardware table to filter out unwanted
1326 * multicast packets before they take up memory.
1327 *
1328 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1329 * address are the offset into the table. If that bit is 1, then the
1330 * multicast packet is accepted. Otherwise, it's dropped silently.
1331 *
1332 * To use the 6 bits as an offset into the table, the high 1 bit is
1333 * the number of the 32 bit register, while the low 5 bits are the bit
1334 * within that register.
1335 */
1336 else if (!netdev_mc_empty(dev)) {
1337 struct netdev_hw_addr *ha;
1338
1339 /* Set the Hash perfec mode */
1340 mcr |= MAC_CR_HPFILT_;
1341
1342 /* start with a table of all zeros: reject all */
1343 memset(multicast_table, 0, sizeof(multicast_table));
1344
1345 netdev_for_each_mc_addr(ha, dev) {
1346 u32 position;
1347
1348 /* upper 6 bits are used as hash index */
1349 position = ether_crc(ETH_ALEN, ha->addr)>>26;
1350
1351 multicast_table[position>>5] |= 1 << (position&0x1f);
1352 }
1353
1354 /* be sure I get rid of flags I might have set */
1355 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1356
1357 /* now, the table can be loaded into the chipset */
1358 update_multicast = 1;
1359 } else {
1360 DBG(SMC_DEBUG_MISC, dev, "~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n");
1361 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1362
1363 /*
1364 * since I'm disabling all multicast entirely, I need to
1365 * clear the multicast list
1366 */
1367 memset(multicast_table, 0, sizeof(multicast_table));
1368 update_multicast = 1;
1369 }
1370
1371 spin_lock_irqsave(&lp->lock, flags);
1372 SMC_SET_MAC_CR(lp, mcr);
1373 if (update_multicast) {
1374 DBG(SMC_DEBUG_MISC, dev,
1375 "update mcast hash table 0x%08x 0x%08x\n",
1376 multicast_table[0], multicast_table[1]);
1377 SMC_SET_HASHL(lp, multicast_table[0]);
1378 SMC_SET_HASHH(lp, multicast_table[1]);
1379 }
1380 spin_unlock_irqrestore(&lp->lock, flags);
1381 }
1382
1383
1384 /*
1385 * Open and Initialize the board
1386 *
1387 * Set up everything, reset the card, etc..
1388 */
1389 static int
smc911x_open(struct net_device * dev)1390 smc911x_open(struct net_device *dev)
1391 {
1392 struct smc911x_local *lp = netdev_priv(dev);
1393
1394 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1395
1396 /* reset the hardware */
1397 smc911x_reset(dev);
1398
1399 /* Configure the PHY, initialize the link state */
1400 smc911x_phy_configure(&lp->phy_configure);
1401
1402 /* Turn on Tx + Rx */
1403 smc911x_enable(dev);
1404
1405 netif_start_queue(dev);
1406
1407 return 0;
1408 }
1409
1410 /*
1411 * smc911x_close
1412 *
1413 * this makes the board clean up everything that it can
1414 * and not talk to the outside world. Caused by
1415 * an 'ifconfig ethX down'
1416 */
smc911x_close(struct net_device * dev)1417 static int smc911x_close(struct net_device *dev)
1418 {
1419 struct smc911x_local *lp = netdev_priv(dev);
1420
1421 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1422
1423 netif_stop_queue(dev);
1424 netif_carrier_off(dev);
1425
1426 /* clear everything */
1427 smc911x_shutdown(dev);
1428
1429 if (lp->phy_type != 0) {
1430 /* We need to ensure that no calls to
1431 * smc911x_phy_configure are pending.
1432 */
1433 cancel_work_sync(&lp->phy_configure);
1434 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1435 }
1436
1437 if (lp->pending_tx_skb) {
1438 dev_kfree_skb(lp->pending_tx_skb);
1439 lp->pending_tx_skb = NULL;
1440 }
1441
1442 return 0;
1443 }
1444
1445 /*
1446 * Ethtool support
1447 */
1448 static int
smc911x_ethtool_get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * cmd)1449 smc911x_ethtool_get_link_ksettings(struct net_device *dev,
1450 struct ethtool_link_ksettings *cmd)
1451 {
1452 struct smc911x_local *lp = netdev_priv(dev);
1453 int status;
1454 unsigned long flags;
1455 u32 supported;
1456
1457 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1458
1459 if (lp->phy_type != 0) {
1460 spin_lock_irqsave(&lp->lock, flags);
1461 mii_ethtool_get_link_ksettings(&lp->mii, cmd);
1462 spin_unlock_irqrestore(&lp->lock, flags);
1463 } else {
1464 supported = SUPPORTED_10baseT_Half |
1465 SUPPORTED_10baseT_Full |
1466 SUPPORTED_TP | SUPPORTED_AUI;
1467
1468 if (lp->ctl_rspeed == 10)
1469 cmd->base.speed = SPEED_10;
1470 else if (lp->ctl_rspeed == 100)
1471 cmd->base.speed = SPEED_100;
1472
1473 cmd->base.autoneg = AUTONEG_DISABLE;
1474 cmd->base.port = 0;
1475 SMC_GET_PHY_SPECIAL(lp, lp->mii.phy_id, status);
1476 cmd->base.duplex =
1477 (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1478 DUPLEX_FULL : DUPLEX_HALF;
1479
1480 ethtool_convert_legacy_u32_to_link_mode(
1481 cmd->link_modes.supported, supported);
1482
1483 }
1484
1485 return 0;
1486 }
1487
1488 static int
smc911x_ethtool_set_link_ksettings(struct net_device * dev,const struct ethtool_link_ksettings * cmd)1489 smc911x_ethtool_set_link_ksettings(struct net_device *dev,
1490 const struct ethtool_link_ksettings *cmd)
1491 {
1492 struct smc911x_local *lp = netdev_priv(dev);
1493 int ret;
1494 unsigned long flags;
1495
1496 if (lp->phy_type != 0) {
1497 spin_lock_irqsave(&lp->lock, flags);
1498 ret = mii_ethtool_set_link_ksettings(&lp->mii, cmd);
1499 spin_unlock_irqrestore(&lp->lock, flags);
1500 } else {
1501 if (cmd->base.autoneg != AUTONEG_DISABLE ||
1502 cmd->base.speed != SPEED_10 ||
1503 (cmd->base.duplex != DUPLEX_HALF &&
1504 cmd->base.duplex != DUPLEX_FULL) ||
1505 (cmd->base.port != PORT_TP &&
1506 cmd->base.port != PORT_AUI))
1507 return -EINVAL;
1508
1509 lp->ctl_rfduplx = cmd->base.duplex == DUPLEX_FULL;
1510
1511 ret = 0;
1512 }
1513
1514 return ret;
1515 }
1516
1517 static void
smc911x_ethtool_getdrvinfo(struct net_device * dev,struct ethtool_drvinfo * info)1518 smc911x_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1519 {
1520 strlcpy(info->driver, CARDNAME, sizeof(info->driver));
1521 strlcpy(info->version, version, sizeof(info->version));
1522 strlcpy(info->bus_info, dev_name(dev->dev.parent),
1523 sizeof(info->bus_info));
1524 }
1525
smc911x_ethtool_nwayreset(struct net_device * dev)1526 static int smc911x_ethtool_nwayreset(struct net_device *dev)
1527 {
1528 struct smc911x_local *lp = netdev_priv(dev);
1529 int ret = -EINVAL;
1530 unsigned long flags;
1531
1532 if (lp->phy_type != 0) {
1533 spin_lock_irqsave(&lp->lock, flags);
1534 ret = mii_nway_restart(&lp->mii);
1535 spin_unlock_irqrestore(&lp->lock, flags);
1536 }
1537
1538 return ret;
1539 }
1540
smc911x_ethtool_getmsglevel(struct net_device * dev)1541 static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1542 {
1543 struct smc911x_local *lp = netdev_priv(dev);
1544 return lp->msg_enable;
1545 }
1546
smc911x_ethtool_setmsglevel(struct net_device * dev,u32 level)1547 static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1548 {
1549 struct smc911x_local *lp = netdev_priv(dev);
1550 lp->msg_enable = level;
1551 }
1552
smc911x_ethtool_getregslen(struct net_device * dev)1553 static int smc911x_ethtool_getregslen(struct net_device *dev)
1554 {
1555 /* System regs + MAC regs + PHY regs */
1556 return (((E2P_CMD - ID_REV)/4 + 1) +
1557 (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1558 }
1559
smc911x_ethtool_getregs(struct net_device * dev,struct ethtool_regs * regs,void * buf)1560 static void smc911x_ethtool_getregs(struct net_device *dev,
1561 struct ethtool_regs* regs, void *buf)
1562 {
1563 struct smc911x_local *lp = netdev_priv(dev);
1564 unsigned long flags;
1565 u32 reg,i,j=0;
1566 u32 *data = (u32*)buf;
1567
1568 regs->version = lp->version;
1569 for(i=ID_REV;i<=E2P_CMD;i+=4) {
1570 data[j++] = SMC_inl(lp, i);
1571 }
1572 for(i=MAC_CR;i<=WUCSR;i++) {
1573 spin_lock_irqsave(&lp->lock, flags);
1574 SMC_GET_MAC_CSR(lp, i, reg);
1575 spin_unlock_irqrestore(&lp->lock, flags);
1576 data[j++] = reg;
1577 }
1578 for(i=0;i<=31;i++) {
1579 spin_lock_irqsave(&lp->lock, flags);
1580 SMC_GET_MII(lp, i, lp->mii.phy_id, reg);
1581 spin_unlock_irqrestore(&lp->lock, flags);
1582 data[j++] = reg & 0xFFFF;
1583 }
1584 }
1585
smc911x_ethtool_wait_eeprom_ready(struct net_device * dev)1586 static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1587 {
1588 struct smc911x_local *lp = netdev_priv(dev);
1589 unsigned int timeout;
1590 int e2p_cmd;
1591
1592 e2p_cmd = SMC_GET_E2P_CMD(lp);
1593 for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1594 if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1595 PRINTK(dev, "%s timeout waiting for EEPROM to respond\n",
1596 __func__);
1597 return -EFAULT;
1598 }
1599 mdelay(1);
1600 e2p_cmd = SMC_GET_E2P_CMD(lp);
1601 }
1602 if (timeout == 0) {
1603 PRINTK(dev, "%s timeout waiting for EEPROM CMD not busy\n",
1604 __func__);
1605 return -ETIMEDOUT;
1606 }
1607 return 0;
1608 }
1609
smc911x_ethtool_write_eeprom_cmd(struct net_device * dev,int cmd,int addr)1610 static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1611 int cmd, int addr)
1612 {
1613 struct smc911x_local *lp = netdev_priv(dev);
1614 int ret;
1615
1616 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1617 return ret;
1618 SMC_SET_E2P_CMD(lp, E2P_CMD_EPC_BUSY_ |
1619 ((cmd) & (0x7<<28)) |
1620 ((addr) & 0xFF));
1621 return 0;
1622 }
1623
smc911x_ethtool_read_eeprom_byte(struct net_device * dev,u8 * data)1624 static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1625 u8 *data)
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 *data = SMC_GET_E2P_DATA(lp);
1633 return 0;
1634 }
1635
smc911x_ethtool_write_eeprom_byte(struct net_device * dev,u8 data)1636 static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1637 u8 data)
1638 {
1639 struct smc911x_local *lp = netdev_priv(dev);
1640 int ret;
1641
1642 if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1643 return ret;
1644 SMC_SET_E2P_DATA(lp, data);
1645 return 0;
1646 }
1647
smc911x_ethtool_geteeprom(struct net_device * dev,struct ethtool_eeprom * eeprom,u8 * data)1648 static int smc911x_ethtool_geteeprom(struct net_device *dev,
1649 struct ethtool_eeprom *eeprom, u8 *data)
1650 {
1651 u8 eebuf[SMC911X_EEPROM_LEN];
1652 int i, ret;
1653
1654 for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1655 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1656 return ret;
1657 if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1658 return ret;
1659 }
1660 memcpy(data, eebuf+eeprom->offset, eeprom->len);
1661 return 0;
1662 }
1663
smc911x_ethtool_seteeprom(struct net_device * dev,struct ethtool_eeprom * eeprom,u8 * data)1664 static int smc911x_ethtool_seteeprom(struct net_device *dev,
1665 struct ethtool_eeprom *eeprom, u8 *data)
1666 {
1667 int i, ret;
1668
1669 /* Enable erase */
1670 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1671 return ret;
1672 for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1673 /* erase byte */
1674 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1675 return ret;
1676 /* write byte */
1677 if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1678 return ret;
1679 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1680 return ret;
1681 }
1682 return 0;
1683 }
1684
smc911x_ethtool_geteeprom_len(struct net_device * dev)1685 static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1686 {
1687 return SMC911X_EEPROM_LEN;
1688 }
1689
1690 static const struct ethtool_ops smc911x_ethtool_ops = {
1691 .get_drvinfo = smc911x_ethtool_getdrvinfo,
1692 .get_msglevel = smc911x_ethtool_getmsglevel,
1693 .set_msglevel = smc911x_ethtool_setmsglevel,
1694 .nway_reset = smc911x_ethtool_nwayreset,
1695 .get_link = ethtool_op_get_link,
1696 .get_regs_len = smc911x_ethtool_getregslen,
1697 .get_regs = smc911x_ethtool_getregs,
1698 .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1699 .get_eeprom = smc911x_ethtool_geteeprom,
1700 .set_eeprom = smc911x_ethtool_seteeprom,
1701 .get_link_ksettings = smc911x_ethtool_get_link_ksettings,
1702 .set_link_ksettings = smc911x_ethtool_set_link_ksettings,
1703 };
1704
1705 /*
1706 * smc911x_findirq
1707 *
1708 * This routine has a simple purpose -- make the SMC chip generate an
1709 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1710 */
smc911x_findirq(struct net_device * dev)1711 static int smc911x_findirq(struct net_device *dev)
1712 {
1713 struct smc911x_local *lp = netdev_priv(dev);
1714 int timeout = 20;
1715 unsigned long cookie;
1716
1717 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1718
1719 cookie = probe_irq_on();
1720
1721 /*
1722 * Force a SW interrupt
1723 */
1724
1725 SMC_SET_INT_EN(lp, INT_EN_SW_INT_EN_);
1726
1727 /*
1728 * Wait until positive that the interrupt has been generated
1729 */
1730 do {
1731 int int_status;
1732 udelay(10);
1733 int_status = SMC_GET_INT_EN(lp);
1734 if (int_status & INT_EN_SW_INT_EN_)
1735 break; /* got the interrupt */
1736 } while (--timeout);
1737
1738 /*
1739 * there is really nothing that I can do here if timeout fails,
1740 * as autoirq_report will return a 0 anyway, which is what I
1741 * want in this case. Plus, the clean up is needed in both
1742 * cases.
1743 */
1744
1745 /* and disable all interrupts again */
1746 SMC_SET_INT_EN(lp, 0);
1747
1748 /* and return what I found */
1749 return probe_irq_off(cookie);
1750 }
1751
1752 static const struct net_device_ops smc911x_netdev_ops = {
1753 .ndo_open = smc911x_open,
1754 .ndo_stop = smc911x_close,
1755 .ndo_start_xmit = smc911x_hard_start_xmit,
1756 .ndo_tx_timeout = smc911x_timeout,
1757 .ndo_set_rx_mode = smc911x_set_multicast_list,
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 */
smc911x_probe(struct net_device * dev)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 #ifdef SMC_USE_DMA
1796 struct dma_slave_config config;
1797 dma_cap_mask_t mask;
1798 #endif
1799
1800 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1801
1802 /* First, see if the endian word is recognized */
1803 val = SMC_GET_BYTE_TEST(lp);
1804 DBG(SMC_DEBUG_MISC, dev, "%s: endian probe returned 0x%04x\n",
1805 CARDNAME, val);
1806 if (val != 0x87654321) {
1807 netdev_err(dev, "Invalid chip endian 0x%08x\n", val);
1808 retval = -ENODEV;
1809 goto err_out;
1810 }
1811
1812 /*
1813 * check if the revision register is something that I
1814 * recognize. These might need to be added to later,
1815 * as future revisions could be added.
1816 */
1817 chip_id = SMC_GET_PN(lp);
1818 DBG(SMC_DEBUG_MISC, dev, "%s: id probe returned 0x%04x\n",
1819 CARDNAME, chip_id);
1820 for(i=0;chip_ids[i].id != 0; i++) {
1821 if (chip_ids[i].id == chip_id) break;
1822 }
1823 if (!chip_ids[i].id) {
1824 netdev_err(dev, "Unknown chip ID %04x\n", chip_id);
1825 retval = -ENODEV;
1826 goto err_out;
1827 }
1828 version_string = chip_ids[i].name;
1829
1830 revision = SMC_GET_REV(lp);
1831 DBG(SMC_DEBUG_MISC, dev, "%s: revision = 0x%04x\n", CARDNAME, revision);
1832
1833 /* At this point I'll assume that the chip is an SMC911x. */
1834 DBG(SMC_DEBUG_MISC, dev, "%s: Found a %s\n",
1835 CARDNAME, chip_ids[i].name);
1836
1837 /* Validate the TX FIFO size requested */
1838 if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1839 netdev_err(dev, "Invalid TX FIFO size requested %d\n",
1840 tx_fifo_kb);
1841 retval = -EINVAL;
1842 goto err_out;
1843 }
1844
1845 /* fill in some of the fields */
1846 lp->version = chip_ids[i].id;
1847 lp->revision = revision;
1848 lp->tx_fifo_kb = tx_fifo_kb;
1849 /* Reverse calculate the RX FIFO size from the TX */
1850 lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1851 lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1852
1853 /* Set the automatic flow control values */
1854 switch(lp->tx_fifo_kb) {
1855 /*
1856 * AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1857 * AFC_LO is AFC_HI/2
1858 * BACK_DUR is about 5uS*(AFC_LO) rounded down
1859 */
1860 case 2:/* 13440 Rx Data Fifo Size */
1861 lp->afc_cfg=0x008C46AF;break;
1862 case 3:/* 12480 Rx Data Fifo Size */
1863 lp->afc_cfg=0x0082419F;break;
1864 case 4:/* 11520 Rx Data Fifo Size */
1865 lp->afc_cfg=0x00783C9F;break;
1866 case 5:/* 10560 Rx Data Fifo Size */
1867 lp->afc_cfg=0x006E374F;break;
1868 case 6:/* 9600 Rx Data Fifo Size */
1869 lp->afc_cfg=0x0064328F;break;
1870 case 7:/* 8640 Rx Data Fifo Size */
1871 lp->afc_cfg=0x005A2D7F;break;
1872 case 8:/* 7680 Rx Data Fifo Size */
1873 lp->afc_cfg=0x0050287F;break;
1874 case 9:/* 6720 Rx Data Fifo Size */
1875 lp->afc_cfg=0x0046236F;break;
1876 case 10:/* 5760 Rx Data Fifo Size */
1877 lp->afc_cfg=0x003C1E6F;break;
1878 case 11:/* 4800 Rx Data Fifo Size */
1879 lp->afc_cfg=0x0032195F;break;
1880 /*
1881 * AFC_HI is ~1520 bytes less than RX Data Fifo Size
1882 * AFC_LO is AFC_HI/2
1883 * BACK_DUR is about 5uS*(AFC_LO) rounded down
1884 */
1885 case 12:/* 3840 Rx Data Fifo Size */
1886 lp->afc_cfg=0x0024124F;break;
1887 case 13:/* 2880 Rx Data Fifo Size */
1888 lp->afc_cfg=0x0015073F;break;
1889 case 14:/* 1920 Rx Data Fifo Size */
1890 lp->afc_cfg=0x0006032F;break;
1891 default:
1892 PRINTK(dev, "ERROR -- no AFC_CFG setting found");
1893 break;
1894 }
1895
1896 DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX, dev,
1897 "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1898 lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1899
1900 spin_lock_init(&lp->lock);
1901
1902 /* Get the MAC address */
1903 SMC_GET_MAC_ADDR(lp, dev->dev_addr);
1904
1905 /* now, reset the chip, and put it into a known state */
1906 smc911x_reset(dev);
1907
1908 /*
1909 * If dev->irq is 0, then the device has to be banged on to see
1910 * what the IRQ is.
1911 *
1912 * Specifying an IRQ is done with the assumption that the user knows
1913 * what (s)he is doing. No checking is done!!!!
1914 */
1915 if (dev->irq < 1) {
1916 int trials;
1917
1918 trials = 3;
1919 while (trials--) {
1920 dev->irq = smc911x_findirq(dev);
1921 if (dev->irq)
1922 break;
1923 /* kick the card and try again */
1924 smc911x_reset(dev);
1925 }
1926 }
1927 if (dev->irq == 0) {
1928 netdev_warn(dev, "Couldn't autodetect your IRQ. Use irq=xx.\n");
1929 retval = -ENODEV;
1930 goto err_out;
1931 }
1932 dev->irq = irq_canonicalize(dev->irq);
1933
1934 dev->netdev_ops = &smc911x_netdev_ops;
1935 dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1936 dev->ethtool_ops = &smc911x_ethtool_ops;
1937
1938 INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
1939 lp->mii.phy_id_mask = 0x1f;
1940 lp->mii.reg_num_mask = 0x1f;
1941 lp->mii.force_media = 0;
1942 lp->mii.full_duplex = 0;
1943 lp->mii.dev = dev;
1944 lp->mii.mdio_read = smc911x_phy_read;
1945 lp->mii.mdio_write = smc911x_phy_write;
1946
1947 /*
1948 * Locate the phy, if any.
1949 */
1950 smc911x_phy_detect(dev);
1951
1952 /* Set default parameters */
1953 lp->msg_enable = NETIF_MSG_LINK;
1954 lp->ctl_rfduplx = 1;
1955 lp->ctl_rspeed = 100;
1956
1957 #ifdef SMC_DYNAMIC_BUS_CONFIG
1958 irq_flags = lp->cfg.irq_flags;
1959 #else
1960 irq_flags = IRQF_SHARED | SMC_IRQ_SENSE;
1961 #endif
1962
1963 /* Grab the IRQ */
1964 retval = request_irq(dev->irq, smc911x_interrupt,
1965 irq_flags, dev->name, dev);
1966 if (retval)
1967 goto err_out;
1968
1969 #ifdef SMC_USE_DMA
1970
1971 dma_cap_zero(mask);
1972 dma_cap_set(DMA_SLAVE, mask);
1973 lp->rxdma = dma_request_channel(mask, NULL, NULL);
1974 lp->txdma = dma_request_channel(mask, NULL, NULL);
1975 lp->rxdma_active = 0;
1976 lp->txdma_active = 0;
1977
1978 memset(&config, 0, sizeof(config));
1979 config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1980 config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1981 config.src_addr = lp->physaddr + RX_DATA_FIFO;
1982 config.dst_addr = lp->physaddr + TX_DATA_FIFO;
1983 config.src_maxburst = 32;
1984 config.dst_maxburst = 32;
1985 retval = dmaengine_slave_config(lp->rxdma, &config);
1986 if (retval) {
1987 dev_err(lp->dev, "dma rx channel configuration failed: %d\n",
1988 retval);
1989 goto err_out;
1990 }
1991 retval = dmaengine_slave_config(lp->txdma, &config);
1992 if (retval) {
1993 dev_err(lp->dev, "dma tx channel configuration failed: %d\n",
1994 retval);
1995 goto err_out;
1996 }
1997 #endif
1998
1999 retval = register_netdev(dev);
2000 if (retval == 0) {
2001 /* now, print out the card info, in a short format.. */
2002 netdev_info(dev, "%s (rev %d) at %#lx IRQ %d",
2003 version_string, lp->revision,
2004 dev->base_addr, dev->irq);
2005
2006 #ifdef SMC_USE_DMA
2007 if (lp->rxdma)
2008 pr_cont(" RXDMA %p", lp->rxdma);
2009
2010 if (lp->txdma)
2011 pr_cont(" TXDMA %p", lp->txdma);
2012 #endif
2013 pr_cont("\n");
2014 if (!is_valid_ether_addr(dev->dev_addr)) {
2015 netdev_warn(dev, "Invalid ethernet MAC address. Please set using ifconfig\n");
2016 } else {
2017 /* Print the Ethernet address */
2018 netdev_info(dev, "Ethernet addr: %pM\n",
2019 dev->dev_addr);
2020 }
2021
2022 if (lp->phy_type == 0) {
2023 PRINTK(dev, "No PHY found\n");
2024 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2025 PRINTK(dev, "LAN911x Internal PHY\n");
2026 } else {
2027 PRINTK(dev, "External PHY 0x%08x\n", lp->phy_type);
2028 }
2029 }
2030
2031 err_out:
2032 #ifdef SMC_USE_DMA
2033 if (retval) {
2034 if (lp->rxdma)
2035 dma_release_channel(lp->rxdma);
2036 if (lp->txdma)
2037 dma_release_channel(lp->txdma);
2038 }
2039 #endif
2040 return retval;
2041 }
2042
2043 /*
2044 * smc911x_drv_probe(void)
2045 *
2046 * Output:
2047 * 0 --> there is a device
2048 * anything else, error
2049 */
smc911x_drv_probe(struct platform_device * pdev)2050 static int smc911x_drv_probe(struct platform_device *pdev)
2051 {
2052 struct net_device *ndev;
2053 struct resource *res;
2054 struct smc911x_local *lp;
2055 void __iomem *addr;
2056 int ret;
2057
2058 /* ndev is not valid yet, so avoid passing it in. */
2059 DBG(SMC_DEBUG_FUNC, "--> %s\n", __func__);
2060 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2061 if (!res) {
2062 ret = -ENODEV;
2063 goto out;
2064 }
2065
2066 /*
2067 * Request the regions.
2068 */
2069 if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2070 ret = -EBUSY;
2071 goto out;
2072 }
2073
2074 ndev = alloc_etherdev(sizeof(struct smc911x_local));
2075 if (!ndev) {
2076 ret = -ENOMEM;
2077 goto release_1;
2078 }
2079 SET_NETDEV_DEV(ndev, &pdev->dev);
2080
2081 ndev->dma = (unsigned char)-1;
2082 ndev->irq = platform_get_irq(pdev, 0);
2083 lp = netdev_priv(ndev);
2084 lp->netdev = ndev;
2085 #ifdef SMC_DYNAMIC_BUS_CONFIG
2086 {
2087 struct smc911x_platdata *pd = dev_get_platdata(&pdev->dev);
2088 if (!pd) {
2089 ret = -EINVAL;
2090 goto release_both;
2091 }
2092 memcpy(&lp->cfg, pd, sizeof(lp->cfg));
2093 }
2094 #endif
2095
2096 addr = ioremap(res->start, SMC911X_IO_EXTENT);
2097 if (!addr) {
2098 ret = -ENOMEM;
2099 goto release_both;
2100 }
2101
2102 platform_set_drvdata(pdev, ndev);
2103 lp->base = addr;
2104 ndev->base_addr = res->start;
2105 ret = smc911x_probe(ndev);
2106 if (ret != 0) {
2107 iounmap(addr);
2108 release_both:
2109 free_netdev(ndev);
2110 release_1:
2111 release_mem_region(res->start, SMC911X_IO_EXTENT);
2112 out:
2113 pr_info("%s: not found (%d).\n", CARDNAME, ret);
2114 }
2115 #ifdef SMC_USE_DMA
2116 else {
2117 lp->physaddr = res->start;
2118 lp->dev = &pdev->dev;
2119 }
2120 #endif
2121
2122 return ret;
2123 }
2124
smc911x_drv_remove(struct platform_device * pdev)2125 static int smc911x_drv_remove(struct platform_device *pdev)
2126 {
2127 struct net_device *ndev = platform_get_drvdata(pdev);
2128 struct smc911x_local *lp = netdev_priv(ndev);
2129 struct resource *res;
2130
2131 DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2132
2133 unregister_netdev(ndev);
2134
2135 free_irq(ndev->irq, ndev);
2136
2137 #ifdef SMC_USE_DMA
2138 {
2139 if (lp->rxdma)
2140 dma_release_channel(lp->rxdma);
2141 if (lp->txdma)
2142 dma_release_channel(lp->txdma);
2143 }
2144 #endif
2145 iounmap(lp->base);
2146 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2147 release_mem_region(res->start, SMC911X_IO_EXTENT);
2148
2149 free_netdev(ndev);
2150 return 0;
2151 }
2152
smc911x_drv_suspend(struct platform_device * dev,pm_message_t state)2153 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2154 {
2155 struct net_device *ndev = platform_get_drvdata(dev);
2156 struct smc911x_local *lp = netdev_priv(ndev);
2157
2158 DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2159 if (ndev) {
2160 if (netif_running(ndev)) {
2161 netif_device_detach(ndev);
2162 smc911x_shutdown(ndev);
2163 #if POWER_DOWN
2164 /* Set D2 - Energy detect only setting */
2165 SMC_SET_PMT_CTRL(lp, 2<<12);
2166 #endif
2167 }
2168 }
2169 return 0;
2170 }
2171
smc911x_drv_resume(struct platform_device * dev)2172 static int smc911x_drv_resume(struct platform_device *dev)
2173 {
2174 struct net_device *ndev = platform_get_drvdata(dev);
2175
2176 DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2177 if (ndev) {
2178 struct smc911x_local *lp = netdev_priv(ndev);
2179
2180 if (netif_running(ndev)) {
2181 smc911x_reset(ndev);
2182 if (lp->phy_type != 0)
2183 smc911x_phy_configure(&lp->phy_configure);
2184 smc911x_enable(ndev);
2185 netif_device_attach(ndev);
2186 }
2187 }
2188 return 0;
2189 }
2190
2191 static struct platform_driver smc911x_driver = {
2192 .probe = smc911x_drv_probe,
2193 .remove = smc911x_drv_remove,
2194 .suspend = smc911x_drv_suspend,
2195 .resume = smc911x_drv_resume,
2196 .driver = {
2197 .name = CARDNAME,
2198 },
2199 };
2200
2201 module_platform_driver(smc911x_driver);
2202