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 */
smc911x_hard_start_xmit(struct sk_buff * skb,struct net_device * dev)516 static int smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
517 {
518 struct smc911x_local *lp = netdev_priv(dev);
519 unsigned int free;
520 unsigned long flags;
521
522 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
523 __func__);
524
525 spin_lock_irqsave(&lp->lock, flags);
526
527 BUG_ON(lp->pending_tx_skb != NULL);
528
529 free = SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TDFREE_;
530 DBG(SMC_DEBUG_TX, dev, "TX free space %d\n", free);
531
532 /* Turn off the flow when running out of space in FIFO */
533 if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
534 DBG(SMC_DEBUG_TX, dev, "Disabling data flow due to low FIFO space (%d)\n",
535 free);
536 /* Reenable when at least 1 packet of size MTU present */
537 SMC_SET_FIFO_TDA(lp, (SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
538 lp->tx_throttle = 1;
539 netif_stop_queue(dev);
540 }
541
542 /* Drop packets when we run out of space in TX FIFO
543 * Account for overhead required for:
544 *
545 * Tx command words 8 bytes
546 * Start offset 15 bytes
547 * End padding 15 bytes
548 */
549 if (unlikely(free < (skb->len + 8 + 15 + 15))) {
550 netdev_warn(dev, "No Tx free space %d < %d\n",
551 free, skb->len);
552 lp->pending_tx_skb = NULL;
553 dev->stats.tx_errors++;
554 dev->stats.tx_dropped++;
555 spin_unlock_irqrestore(&lp->lock, flags);
556 dev_kfree_skb_any(skb);
557 return NETDEV_TX_OK;
558 }
559
560 #ifdef SMC_USE_DMA
561 {
562 /* If the DMA is already running then defer this packet Tx until
563 * the DMA IRQ starts it
564 */
565 if (lp->txdma_active) {
566 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Tx DMA running, deferring packet\n");
567 lp->pending_tx_skb = skb;
568 netif_stop_queue(dev);
569 spin_unlock_irqrestore(&lp->lock, flags);
570 return NETDEV_TX_OK;
571 } else {
572 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Activating Tx DMA\n");
573 lp->txdma_active = 1;
574 }
575 }
576 #endif
577 lp->pending_tx_skb = skb;
578 smc911x_hardware_send_pkt(dev);
579 spin_unlock_irqrestore(&lp->lock, flags);
580
581 return NETDEV_TX_OK;
582 }
583
584 /*
585 * This handles a TX status interrupt, which is only called when:
586 * - a TX error occurred, or
587 * - TX of a packet completed.
588 */
smc911x_tx(struct net_device * dev)589 static void smc911x_tx(struct net_device *dev)
590 {
591 struct smc911x_local *lp = netdev_priv(dev);
592 unsigned int tx_status;
593
594 DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
595 __func__);
596
597 /* Collect the TX status */
598 while (((SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
599 DBG(SMC_DEBUG_TX, dev, "Tx stat FIFO used 0x%04x\n",
600 (SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16);
601 tx_status = SMC_GET_TX_STS_FIFO(lp);
602 dev->stats.tx_packets++;
603 dev->stats.tx_bytes+=tx_status>>16;
604 DBG(SMC_DEBUG_TX, dev, "Tx FIFO tag 0x%04x status 0x%04x\n",
605 (tx_status & 0xffff0000) >> 16,
606 tx_status & 0x0000ffff);
607 /* count Tx errors, but ignore lost carrier errors when in
608 * full-duplex mode */
609 if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
610 !(tx_status & 0x00000306))) {
611 dev->stats.tx_errors++;
612 }
613 if (tx_status & TX_STS_MANY_COLL_) {
614 dev->stats.collisions+=16;
615 dev->stats.tx_aborted_errors++;
616 } else {
617 dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
618 }
619 /* carrier error only has meaning for half-duplex communication */
620 if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
621 !lp->ctl_rfduplx) {
622 dev->stats.tx_carrier_errors++;
623 }
624 if (tx_status & TX_STS_LATE_COLL_) {
625 dev->stats.collisions++;
626 dev->stats.tx_aborted_errors++;
627 }
628 }
629 }
630
631
632 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
633 /*
634 * Reads a register from the MII Management serial interface
635 */
636
smc911x_phy_read(struct net_device * dev,int phyaddr,int phyreg)637 static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
638 {
639 struct smc911x_local *lp = netdev_priv(dev);
640 unsigned int phydata;
641
642 SMC_GET_MII(lp, phyreg, phyaddr, phydata);
643
644 DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
645 __func__, phyaddr, phyreg, phydata);
646 return phydata;
647 }
648
649
650 /*
651 * Writes a register to the MII Management serial interface
652 */
smc911x_phy_write(struct net_device * dev,int phyaddr,int phyreg,int phydata)653 static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
654 int phydata)
655 {
656 struct smc911x_local *lp = netdev_priv(dev);
657
658 DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
659 __func__, phyaddr, phyreg, phydata);
660
661 SMC_SET_MII(lp, phyreg, phyaddr, phydata);
662 }
663
664 /*
665 * Finds and reports the PHY address (115 and 117 have external
666 * PHY interface 118 has internal only
667 */
smc911x_phy_detect(struct net_device * dev)668 static void smc911x_phy_detect(struct net_device *dev)
669 {
670 struct smc911x_local *lp = netdev_priv(dev);
671 int phyaddr;
672 unsigned int cfg, id1, id2;
673
674 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
675
676 lp->phy_type = 0;
677
678 /*
679 * Scan all 32 PHY addresses if necessary, starting at
680 * PHY#1 to PHY#31, and then PHY#0 last.
681 */
682 switch(lp->version) {
683 case CHIP_9115:
684 case CHIP_9117:
685 case CHIP_9215:
686 case CHIP_9217:
687 cfg = SMC_GET_HW_CFG(lp);
688 if (cfg & HW_CFG_EXT_PHY_DET_) {
689 cfg &= ~HW_CFG_PHY_CLK_SEL_;
690 cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
691 SMC_SET_HW_CFG(lp, cfg);
692 udelay(10); /* Wait for clocks to stop */
693
694 cfg |= HW_CFG_EXT_PHY_EN_;
695 SMC_SET_HW_CFG(lp, cfg);
696 udelay(10); /* Wait for clocks to stop */
697
698 cfg &= ~HW_CFG_PHY_CLK_SEL_;
699 cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
700 SMC_SET_HW_CFG(lp, cfg);
701 udelay(10); /* Wait for clocks to stop */
702
703 cfg |= HW_CFG_SMI_SEL_;
704 SMC_SET_HW_CFG(lp, cfg);
705
706 for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
707
708 /* Read the PHY identifiers */
709 SMC_GET_PHY_ID1(lp, phyaddr & 31, id1);
710 SMC_GET_PHY_ID2(lp, phyaddr & 31, id2);
711
712 /* Make sure it is a valid identifier */
713 if (id1 != 0x0000 && id1 != 0xffff &&
714 id1 != 0x8000 && id2 != 0x0000 &&
715 id2 != 0xffff && id2 != 0x8000) {
716 /* Save the PHY's address */
717 lp->mii.phy_id = phyaddr & 31;
718 lp->phy_type = id1 << 16 | id2;
719 break;
720 }
721 }
722 if (phyaddr < 32)
723 /* Found an external PHY */
724 break;
725 }
726 default:
727 /* Internal media only */
728 SMC_GET_PHY_ID1(lp, 1, id1);
729 SMC_GET_PHY_ID2(lp, 1, id2);
730 /* Save the PHY's address */
731 lp->mii.phy_id = 1;
732 lp->phy_type = id1 << 16 | id2;
733 }
734
735 DBG(SMC_DEBUG_MISC, dev, "phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%x\n",
736 id1, id2, lp->mii.phy_id);
737 }
738
739 /*
740 * Sets the PHY to a configuration as determined by the user.
741 * Called with spin_lock held.
742 */
smc911x_phy_fixed(struct net_device * dev)743 static int smc911x_phy_fixed(struct net_device *dev)
744 {
745 struct smc911x_local *lp = netdev_priv(dev);
746 int phyaddr = lp->mii.phy_id;
747 int bmcr;
748
749 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
750
751 /* Enter Link Disable state */
752 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
753 bmcr |= BMCR_PDOWN;
754 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
755
756 /*
757 * Set our fixed capabilities
758 * Disable auto-negotiation
759 */
760 bmcr &= ~BMCR_ANENABLE;
761 if (lp->ctl_rfduplx)
762 bmcr |= BMCR_FULLDPLX;
763
764 if (lp->ctl_rspeed == 100)
765 bmcr |= BMCR_SPEED100;
766
767 /* Write our capabilities to the phy control register */
768 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
769
770 /* Re-Configure the Receive/Phy Control register */
771 bmcr &= ~BMCR_PDOWN;
772 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
773
774 return 1;
775 }
776
777 /**
778 * smc911x_phy_reset - reset the phy
779 * @dev: net device
780 * @phy: phy address
781 *
782 * Issue a software reset for the specified PHY and
783 * wait up to 100ms for the reset to complete. We should
784 * not access the PHY for 50ms after issuing the reset.
785 *
786 * The time to wait appears to be dependent on the PHY.
787 *
788 */
smc911x_phy_reset(struct net_device * dev,int phy)789 static int smc911x_phy_reset(struct net_device *dev, int phy)
790 {
791 struct smc911x_local *lp = netdev_priv(dev);
792 int timeout;
793 unsigned long flags;
794 unsigned int reg;
795
796 DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
797
798 spin_lock_irqsave(&lp->lock, flags);
799 reg = SMC_GET_PMT_CTRL(lp);
800 reg &= ~0xfffff030;
801 reg |= PMT_CTRL_PHY_RST_;
802 SMC_SET_PMT_CTRL(lp, reg);
803 spin_unlock_irqrestore(&lp->lock, flags);
804 for (timeout = 2; timeout; timeout--) {
805 msleep(50);
806 spin_lock_irqsave(&lp->lock, flags);
807 reg = SMC_GET_PMT_CTRL(lp);
808 spin_unlock_irqrestore(&lp->lock, flags);
809 if (!(reg & PMT_CTRL_PHY_RST_)) {
810 /* extra delay required because the phy may
811 * not be completed with its reset
812 * when PHY_BCR_RESET_ is cleared. 256us
813 * should suffice, but use 500us to be safe
814 */
815 udelay(500);
816 break;
817 }
818 }
819
820 return reg & PMT_CTRL_PHY_RST_;
821 }
822
823 /**
824 * smc911x_phy_powerdown - powerdown phy
825 * @dev: net device
826 * @phy: phy address
827 *
828 * Power down the specified PHY
829 */
smc911x_phy_powerdown(struct net_device * dev,int phy)830 static void smc911x_phy_powerdown(struct net_device *dev, int phy)
831 {
832 struct smc911x_local *lp = netdev_priv(dev);
833 unsigned int bmcr;
834
835 /* Enter Link Disable state */
836 SMC_GET_PHY_BMCR(lp, phy, bmcr);
837 bmcr |= BMCR_PDOWN;
838 SMC_SET_PHY_BMCR(lp, phy, bmcr);
839 }
840
841 /**
842 * smc911x_phy_check_media - check the media status and adjust BMCR
843 * @dev: net device
844 * @init: set true for initialisation
845 *
846 * Select duplex mode depending on negotiation state. This
847 * also updates our carrier state.
848 */
smc911x_phy_check_media(struct net_device * dev,int init)849 static void smc911x_phy_check_media(struct net_device *dev, int init)
850 {
851 struct smc911x_local *lp = netdev_priv(dev);
852 int phyaddr = lp->mii.phy_id;
853 unsigned int bmcr, cr;
854
855 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
856
857 if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
858 /* duplex state has changed */
859 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
860 SMC_GET_MAC_CR(lp, cr);
861 if (lp->mii.full_duplex) {
862 DBG(SMC_DEBUG_MISC, dev, "Configuring for full-duplex mode\n");
863 bmcr |= BMCR_FULLDPLX;
864 cr |= MAC_CR_RCVOWN_;
865 } else {
866 DBG(SMC_DEBUG_MISC, dev, "Configuring for half-duplex mode\n");
867 bmcr &= ~BMCR_FULLDPLX;
868 cr &= ~MAC_CR_RCVOWN_;
869 }
870 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
871 SMC_SET_MAC_CR(lp, cr);
872 }
873 }
874
875 /*
876 * Configures the specified PHY through the MII management interface
877 * using Autonegotiation.
878 * Calls smc911x_phy_fixed() if the user has requested a certain config.
879 * If RPC ANEG bit is set, the media selection is dependent purely on
880 * the selection by the MII (either in the MII BMCR reg or the result
881 * of autonegotiation.) If the RPC ANEG bit is cleared, the selection
882 * is controlled by the RPC SPEED and RPC DPLX bits.
883 */
smc911x_phy_configure(struct work_struct * work)884 static void smc911x_phy_configure(struct work_struct *work)
885 {
886 struct smc911x_local *lp = container_of(work, struct smc911x_local,
887 phy_configure);
888 struct net_device *dev = lp->netdev;
889 int phyaddr = lp->mii.phy_id;
890 int my_phy_caps; /* My PHY capabilities */
891 int my_ad_caps; /* My Advertised capabilities */
892 int status;
893 unsigned long flags;
894
895 DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
896
897 /*
898 * We should not be called if phy_type is zero.
899 */
900 if (lp->phy_type == 0)
901 return;
902
903 if (smc911x_phy_reset(dev, phyaddr)) {
904 netdev_info(dev, "PHY reset timed out\n");
905 return;
906 }
907 spin_lock_irqsave(&lp->lock, flags);
908
909 /*
910 * Enable PHY Interrupts (for register 18)
911 * Interrupts listed here are enabled
912 */
913 SMC_SET_PHY_INT_MASK(lp, phyaddr, PHY_INT_MASK_ENERGY_ON_ |
914 PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
915 PHY_INT_MASK_LINK_DOWN_);
916
917 /* If the user requested no auto neg, then go set his request */
918 if (lp->mii.force_media) {
919 smc911x_phy_fixed(dev);
920 goto smc911x_phy_configure_exit;
921 }
922
923 /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
924 SMC_GET_PHY_BMSR(lp, phyaddr, my_phy_caps);
925 if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
926 netdev_info(dev, "Auto negotiation NOT supported\n");
927 smc911x_phy_fixed(dev);
928 goto smc911x_phy_configure_exit;
929 }
930
931 /* CSMA capable w/ both pauses */
932 my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
933
934 if (my_phy_caps & BMSR_100BASE4)
935 my_ad_caps |= ADVERTISE_100BASE4;
936 if (my_phy_caps & BMSR_100FULL)
937 my_ad_caps |= ADVERTISE_100FULL;
938 if (my_phy_caps & BMSR_100HALF)
939 my_ad_caps |= ADVERTISE_100HALF;
940 if (my_phy_caps & BMSR_10FULL)
941 my_ad_caps |= ADVERTISE_10FULL;
942 if (my_phy_caps & BMSR_10HALF)
943 my_ad_caps |= ADVERTISE_10HALF;
944
945 /* Disable capabilities not selected by our user */
946 if (lp->ctl_rspeed != 100)
947 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
948
949 if (!lp->ctl_rfduplx)
950 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
951
952 /* Update our Auto-Neg Advertisement Register */
953 SMC_SET_PHY_MII_ADV(lp, phyaddr, my_ad_caps);
954 lp->mii.advertising = my_ad_caps;
955
956 /*
957 * Read the register back. Without this, it appears that when
958 * auto-negotiation is restarted, sometimes it isn't ready and
959 * the link does not come up.
960 */
961 udelay(10);
962 SMC_GET_PHY_MII_ADV(lp, phyaddr, status);
963
964 DBG(SMC_DEBUG_MISC, dev, "phy caps=0x%04x\n", my_phy_caps);
965 DBG(SMC_DEBUG_MISC, dev, "phy advertised caps=0x%04x\n", my_ad_caps);
966
967 /* Restart auto-negotiation process in order to advertise my caps */
968 SMC_SET_PHY_BMCR(lp, phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
969
970 smc911x_phy_check_media(dev, 1);
971
972 smc911x_phy_configure_exit:
973 spin_unlock_irqrestore(&lp->lock, flags);
974 }
975
976 /*
977 * smc911x_phy_interrupt
978 *
979 * Purpose: Handle interrupts relating to PHY register 18. This is
980 * called from the "hard" interrupt handler under our private spinlock.
981 */
smc911x_phy_interrupt(struct net_device * dev)982 static void smc911x_phy_interrupt(struct net_device *dev)
983 {
984 struct smc911x_local *lp = netdev_priv(dev);
985 int phyaddr = lp->mii.phy_id;
986 int status;
987
988 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
989
990 if (lp->phy_type == 0)
991 return;
992
993 smc911x_phy_check_media(dev, 0);
994 /* read to clear status bits */
995 SMC_GET_PHY_INT_SRC(lp, phyaddr,status);
996 DBG(SMC_DEBUG_MISC, dev, "PHY interrupt status 0x%04x\n",
997 status & 0xffff);
998 DBG(SMC_DEBUG_MISC, dev, "AFC_CFG 0x%08x\n",
999 SMC_GET_AFC_CFG(lp));
1000 }
1001
1002 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1003
1004 /*
1005 * This is the main routine of the driver, to handle the device when
1006 * it needs some attention.
1007 */
smc911x_interrupt(int irq,void * dev_id)1008 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1009 {
1010 struct net_device *dev = dev_id;
1011 struct smc911x_local *lp = netdev_priv(dev);
1012 unsigned int status, mask, timeout;
1013 unsigned int rx_overrun=0, cr, pkts;
1014 unsigned long flags;
1015
1016 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1017
1018 spin_lock_irqsave(&lp->lock, flags);
1019
1020 /* Spurious interrupt check */
1021 if ((SMC_GET_IRQ_CFG(lp) & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1022 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1023 spin_unlock_irqrestore(&lp->lock, flags);
1024 return IRQ_NONE;
1025 }
1026
1027 mask = SMC_GET_INT_EN(lp);
1028 SMC_SET_INT_EN(lp, 0);
1029
1030 /* set a timeout value, so I don't stay here forever */
1031 timeout = 8;
1032
1033
1034 do {
1035 status = SMC_GET_INT(lp);
1036
1037 DBG(SMC_DEBUG_MISC, dev, "INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1038 status, mask, status & ~mask);
1039
1040 status &= mask;
1041 if (!status)
1042 break;
1043
1044 /* Handle SW interrupt condition */
1045 if (status & INT_STS_SW_INT_) {
1046 SMC_ACK_INT(lp, INT_STS_SW_INT_);
1047 mask &= ~INT_EN_SW_INT_EN_;
1048 }
1049 /* Handle various error conditions */
1050 if (status & INT_STS_RXE_) {
1051 SMC_ACK_INT(lp, INT_STS_RXE_);
1052 dev->stats.rx_errors++;
1053 }
1054 if (status & INT_STS_RXDFH_INT_) {
1055 SMC_ACK_INT(lp, INT_STS_RXDFH_INT_);
1056 dev->stats.rx_dropped+=SMC_GET_RX_DROP(lp);
1057 }
1058 /* Undocumented interrupt-what is the right thing to do here? */
1059 if (status & INT_STS_RXDF_INT_) {
1060 SMC_ACK_INT(lp, INT_STS_RXDF_INT_);
1061 }
1062
1063 /* Rx Data FIFO exceeds set level */
1064 if (status & INT_STS_RDFL_) {
1065 if (IS_REV_A(lp->revision)) {
1066 rx_overrun=1;
1067 SMC_GET_MAC_CR(lp, cr);
1068 cr &= ~MAC_CR_RXEN_;
1069 SMC_SET_MAC_CR(lp, cr);
1070 DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1071 dev->stats.rx_errors++;
1072 dev->stats.rx_fifo_errors++;
1073 }
1074 SMC_ACK_INT(lp, INT_STS_RDFL_);
1075 }
1076 if (status & INT_STS_RDFO_) {
1077 if (!IS_REV_A(lp->revision)) {
1078 SMC_GET_MAC_CR(lp, cr);
1079 cr &= ~MAC_CR_RXEN_;
1080 SMC_SET_MAC_CR(lp, cr);
1081 rx_overrun=1;
1082 DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1083 dev->stats.rx_errors++;
1084 dev->stats.rx_fifo_errors++;
1085 }
1086 SMC_ACK_INT(lp, INT_STS_RDFO_);
1087 }
1088 /* Handle receive condition */
1089 if ((status & INT_STS_RSFL_) || rx_overrun) {
1090 unsigned int fifo;
1091 DBG(SMC_DEBUG_RX, dev, "RX irq\n");
1092 fifo = SMC_GET_RX_FIFO_INF(lp);
1093 pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1094 DBG(SMC_DEBUG_RX, dev, "Rx FIFO pkts %d, bytes %d\n",
1095 pkts, fifo & 0xFFFF);
1096 if (pkts != 0) {
1097 #ifdef SMC_USE_DMA
1098 unsigned int fifo;
1099 if (lp->rxdma_active){
1100 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1101 "RX DMA active\n");
1102 /* The DMA is already running so up the IRQ threshold */
1103 fifo = SMC_GET_FIFO_INT(lp) & ~0xFF;
1104 fifo |= pkts & 0xFF;
1105 DBG(SMC_DEBUG_RX, dev,
1106 "Setting RX stat FIFO threshold to %d\n",
1107 fifo & 0xff);
1108 SMC_SET_FIFO_INT(lp, fifo);
1109 } else
1110 #endif
1111 smc911x_rcv(dev);
1112 }
1113 SMC_ACK_INT(lp, INT_STS_RSFL_);
1114 }
1115 /* Handle transmit FIFO available */
1116 if (status & INT_STS_TDFA_) {
1117 DBG(SMC_DEBUG_TX, dev, "TX data FIFO space available irq\n");
1118 SMC_SET_FIFO_TDA(lp, 0xFF);
1119 lp->tx_throttle = 0;
1120 #ifdef SMC_USE_DMA
1121 if (!lp->txdma_active)
1122 #endif
1123 netif_wake_queue(dev);
1124 SMC_ACK_INT(lp, INT_STS_TDFA_);
1125 }
1126 /* Handle transmit done condition */
1127 #if 1
1128 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1129 DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC, dev,
1130 "Tx stat FIFO limit (%d) /GPT irq\n",
1131 (SMC_GET_FIFO_INT(lp) & 0x00ff0000) >> 16);
1132 smc911x_tx(dev);
1133 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1134 SMC_ACK_INT(lp, INT_STS_TSFL_);
1135 SMC_ACK_INT(lp, INT_STS_TSFL_ | INT_STS_GPT_INT_);
1136 }
1137 #else
1138 if (status & INT_STS_TSFL_) {
1139 DBG(SMC_DEBUG_TX, dev, "TX status FIFO limit (%d) irq\n", ?);
1140 smc911x_tx(dev);
1141 SMC_ACK_INT(lp, INT_STS_TSFL_);
1142 }
1143
1144 if (status & INT_STS_GPT_INT_) {
1145 DBG(SMC_DEBUG_RX, dev, "IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1146 SMC_GET_IRQ_CFG(lp),
1147 SMC_GET_FIFO_INT(lp),
1148 SMC_GET_RX_CFG(lp));
1149 DBG(SMC_DEBUG_RX, dev, "Rx Stat FIFO Used 0x%02x Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1150 (SMC_GET_RX_FIFO_INF(lp) & 0x00ff0000) >> 16,
1151 SMC_GET_RX_FIFO_INF(lp) & 0xffff,
1152 SMC_GET_RX_STS_FIFO_PEEK(lp));
1153 SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1154 SMC_ACK_INT(lp, INT_STS_GPT_INT_);
1155 }
1156 #endif
1157
1158 /* Handle PHY interrupt condition */
1159 if (status & INT_STS_PHY_INT_) {
1160 DBG(SMC_DEBUG_MISC, dev, "PHY irq\n");
1161 smc911x_phy_interrupt(dev);
1162 SMC_ACK_INT(lp, INT_STS_PHY_INT_);
1163 }
1164 } while (--timeout);
1165
1166 /* restore mask state */
1167 SMC_SET_INT_EN(lp, mask);
1168
1169 DBG(SMC_DEBUG_MISC, dev, "Interrupt done (%d loops)\n",
1170 8-timeout);
1171
1172 spin_unlock_irqrestore(&lp->lock, flags);
1173
1174 return IRQ_HANDLED;
1175 }
1176
1177 #ifdef SMC_USE_DMA
1178 static void
smc911x_tx_dma_irq(void * data)1179 smc911x_tx_dma_irq(void *data)
1180 {
1181 struct smc911x_local *lp = data;
1182 struct net_device *dev = lp->netdev;
1183 struct sk_buff *skb = lp->current_tx_skb;
1184 unsigned long flags;
1185
1186 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1187
1188 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "TX DMA irq handler\n");
1189 BUG_ON(skb == NULL);
1190 dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1191 netif_trans_update(dev);
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
smc911x_rx_dma_irq(void * data)1211 smc911x_rx_dma_irq(void *data)
1212 {
1213 struct smc911x_local *lp = data;
1214 struct net_device *dev = lp->netdev;
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 dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1222 BUG_ON(skb == NULL);
1223 lp->current_rx_skb = NULL;
1224 PRINT_PKT(skb->data, skb->len);
1225 skb->protocol = eth_type_trans(skb, dev);
1226 dev->stats.rx_packets++;
1227 dev->stats.rx_bytes += skb->len;
1228 netif_rx(skb);
1229
1230 spin_lock_irqsave(&lp->lock, flags);
1231 pkts = (SMC_GET_RX_FIFO_INF(lp) & RX_FIFO_INF_RXSUSED_) >> 16;
1232 if (pkts != 0) {
1233 smc911x_rcv(dev);
1234 }else {
1235 lp->rxdma_active = 0;
1236 }
1237 spin_unlock_irqrestore(&lp->lock, flags);
1238 DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1239 "RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1240 pkts);
1241 }
1242 #endif /* SMC_USE_DMA */
1243
1244 #ifdef CONFIG_NET_POLL_CONTROLLER
1245 /*
1246 * Polling receive - used by netconsole and other diagnostic tools
1247 * to allow network i/o with interrupts disabled.
1248 */
smc911x_poll_controller(struct net_device * dev)1249 static void smc911x_poll_controller(struct net_device *dev)
1250 {
1251 disable_irq(dev->irq);
1252 smc911x_interrupt(dev->irq, dev);
1253 enable_irq(dev->irq);
1254 }
1255 #endif
1256
1257 /* Our watchdog timed out. Called by the networking layer */
smc911x_timeout(struct net_device * dev)1258 static void smc911x_timeout(struct net_device *dev)
1259 {
1260 struct smc911x_local *lp = netdev_priv(dev);
1261 int status, mask;
1262 unsigned long flags;
1263
1264 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1265
1266 spin_lock_irqsave(&lp->lock, flags);
1267 status = SMC_GET_INT(lp);
1268 mask = SMC_GET_INT_EN(lp);
1269 spin_unlock_irqrestore(&lp->lock, flags);
1270 DBG(SMC_DEBUG_MISC, dev, "INT 0x%02x MASK 0x%02x\n",
1271 status, mask);
1272
1273 /* Dump the current TX FIFO contents and restart */
1274 mask = SMC_GET_TX_CFG(lp);
1275 SMC_SET_TX_CFG(lp, mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1276 /*
1277 * Reconfiguring the PHY doesn't seem like a bad idea here, but
1278 * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1279 * which calls schedule(). Hence we use a work queue.
1280 */
1281 if (lp->phy_type != 0)
1282 schedule_work(&lp->phy_configure);
1283
1284 /* We can accept TX packets again */
1285 netif_trans_update(dev); /* prevent tx timeout */
1286 netif_wake_queue(dev);
1287 }
1288
1289 /*
1290 * This routine will, depending on the values passed to it,
1291 * either make it accept multicast packets, go into
1292 * promiscuous mode (for TCPDUMP and cousins) or accept
1293 * a select set of multicast packets
1294 */
smc911x_set_multicast_list(struct net_device * dev)1295 static void smc911x_set_multicast_list(struct net_device *dev)
1296 {
1297 struct smc911x_local *lp = netdev_priv(dev);
1298 unsigned int multicast_table[2];
1299 unsigned int mcr, update_multicast = 0;
1300 unsigned long flags;
1301
1302 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1303
1304 spin_lock_irqsave(&lp->lock, flags);
1305 SMC_GET_MAC_CR(lp, mcr);
1306 spin_unlock_irqrestore(&lp->lock, flags);
1307
1308 if (dev->flags & IFF_PROMISC) {
1309
1310 DBG(SMC_DEBUG_MISC, dev, "RCR_PRMS\n");
1311 mcr |= MAC_CR_PRMS_;
1312 }
1313 /*
1314 * Here, I am setting this to accept all multicast packets.
1315 * I don't need to zero the multicast table, because the flag is
1316 * checked before the table is
1317 */
1318 else if (dev->flags & IFF_ALLMULTI || netdev_mc_count(dev) > 16) {
1319 DBG(SMC_DEBUG_MISC, dev, "RCR_ALMUL\n");
1320 mcr |= MAC_CR_MCPAS_;
1321 }
1322
1323 /*
1324 * This sets the internal hardware table to filter out unwanted
1325 * multicast packets before they take up memory.
1326 *
1327 * The SMC chip uses a hash table where the high 6 bits of the CRC of
1328 * address are the offset into the table. If that bit is 1, then the
1329 * multicast packet is accepted. Otherwise, it's dropped silently.
1330 *
1331 * To use the 6 bits as an offset into the table, the high 1 bit is
1332 * the number of the 32 bit register, while the low 5 bits are the bit
1333 * within that register.
1334 */
1335 else if (!netdev_mc_empty(dev)) {
1336 struct netdev_hw_addr *ha;
1337
1338 /* Set the Hash perfec mode */
1339 mcr |= MAC_CR_HPFILT_;
1340
1341 /* start with a table of all zeros: reject all */
1342 memset(multicast_table, 0, sizeof(multicast_table));
1343
1344 netdev_for_each_mc_addr(ha, dev) {
1345 u32 position;
1346
1347 /* upper 6 bits are used as hash index */
1348 position = ether_crc(ETH_ALEN, ha->addr)>>26;
1349
1350 multicast_table[position>>5] |= 1 << (position&0x1f);
1351 }
1352
1353 /* be sure I get rid of flags I might have set */
1354 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1355
1356 /* now, the table can be loaded into the chipset */
1357 update_multicast = 1;
1358 } else {
1359 DBG(SMC_DEBUG_MISC, dev, "~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n");
1360 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1361
1362 /*
1363 * since I'm disabling all multicast entirely, I need to
1364 * clear the multicast list
1365 */
1366 memset(multicast_table, 0, sizeof(multicast_table));
1367 update_multicast = 1;
1368 }
1369
1370 spin_lock_irqsave(&lp->lock, flags);
1371 SMC_SET_MAC_CR(lp, mcr);
1372 if (update_multicast) {
1373 DBG(SMC_DEBUG_MISC, dev,
1374 "update mcast hash table 0x%08x 0x%08x\n",
1375 multicast_table[0], multicast_table[1]);
1376 SMC_SET_HASHL(lp, multicast_table[0]);
1377 SMC_SET_HASHH(lp, multicast_table[1]);
1378 }
1379 spin_unlock_irqrestore(&lp->lock, flags);
1380 }
1381
1382
1383 /*
1384 * Open and Initialize the board
1385 *
1386 * Set up everything, reset the card, etc..
1387 */
1388 static int
smc911x_open(struct net_device * dev)1389 smc911x_open(struct net_device *dev)
1390 {
1391 struct smc911x_local *lp = netdev_priv(dev);
1392
1393 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1394
1395 /* reset the hardware */
1396 smc911x_reset(dev);
1397
1398 /* Configure the PHY, initialize the link state */
1399 smc911x_phy_configure(&lp->phy_configure);
1400
1401 /* Turn on Tx + Rx */
1402 smc911x_enable(dev);
1403
1404 netif_start_queue(dev);
1405
1406 return 0;
1407 }
1408
1409 /*
1410 * smc911x_close
1411 *
1412 * this makes the board clean up everything that it can
1413 * and not talk to the outside world. Caused by
1414 * an 'ifconfig ethX down'
1415 */
smc911x_close(struct net_device * dev)1416 static int smc911x_close(struct net_device *dev)
1417 {
1418 struct smc911x_local *lp = netdev_priv(dev);
1419
1420 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1421
1422 netif_stop_queue(dev);
1423 netif_carrier_off(dev);
1424
1425 /* clear everything */
1426 smc911x_shutdown(dev);
1427
1428 if (lp->phy_type != 0) {
1429 /* We need to ensure that no calls to
1430 * smc911x_phy_configure are pending.
1431 */
1432 cancel_work_sync(&lp->phy_configure);
1433 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1434 }
1435
1436 if (lp->pending_tx_skb) {
1437 dev_kfree_skb(lp->pending_tx_skb);
1438 lp->pending_tx_skb = NULL;
1439 }
1440
1441 return 0;
1442 }
1443
1444 /*
1445 * Ethtool support
1446 */
1447 static int
smc911x_ethtool_get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * cmd)1448 smc911x_ethtool_get_link_ksettings(struct net_device *dev,
1449 struct ethtool_link_ksettings *cmd)
1450 {
1451 struct smc911x_local *lp = netdev_priv(dev);
1452 int status;
1453 unsigned long flags;
1454 u32 supported;
1455
1456 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1457
1458 if (lp->phy_type != 0) {
1459 spin_lock_irqsave(&lp->lock, flags);
1460 mii_ethtool_get_link_ksettings(&lp->mii, cmd);
1461 spin_unlock_irqrestore(&lp->lock, flags);
1462 } else {
1463 supported = SUPPORTED_10baseT_Half |
1464 SUPPORTED_10baseT_Full |
1465 SUPPORTED_TP | SUPPORTED_AUI;
1466
1467 if (lp->ctl_rspeed == 10)
1468 cmd->base.speed = SPEED_10;
1469 else if (lp->ctl_rspeed == 100)
1470 cmd->base.speed = SPEED_100;
1471
1472 cmd->base.autoneg = AUTONEG_DISABLE;
1473 cmd->base.port = 0;
1474 SMC_GET_PHY_SPECIAL(lp, lp->mii.phy_id, status);
1475 cmd->base.duplex =
1476 (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1477 DUPLEX_FULL : DUPLEX_HALF;
1478
1479 ethtool_convert_legacy_u32_to_link_mode(
1480 cmd->link_modes.supported, supported);
1481
1482 }
1483
1484 return 0;
1485 }
1486
1487 static int
smc911x_ethtool_set_link_ksettings(struct net_device * dev,const struct ethtool_link_ksettings * cmd)1488 smc911x_ethtool_set_link_ksettings(struct net_device *dev,
1489 const struct ethtool_link_ksettings *cmd)
1490 {
1491 struct smc911x_local *lp = netdev_priv(dev);
1492 int ret;
1493 unsigned long flags;
1494
1495 if (lp->phy_type != 0) {
1496 spin_lock_irqsave(&lp->lock, flags);
1497 ret = mii_ethtool_set_link_ksettings(&lp->mii, cmd);
1498 spin_unlock_irqrestore(&lp->lock, flags);
1499 } else {
1500 if (cmd->base.autoneg != AUTONEG_DISABLE ||
1501 cmd->base.speed != SPEED_10 ||
1502 (cmd->base.duplex != DUPLEX_HALF &&
1503 cmd->base.duplex != DUPLEX_FULL) ||
1504 (cmd->base.port != PORT_TP &&
1505 cmd->base.port != PORT_AUI))
1506 return -EINVAL;
1507
1508 lp->ctl_rfduplx = cmd->base.duplex == DUPLEX_FULL;
1509
1510 ret = 0;
1511 }
1512
1513 return ret;
1514 }
1515
1516 static void
smc911x_ethtool_getdrvinfo(struct net_device * dev,struct ethtool_drvinfo * info)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
smc911x_ethtool_nwayreset(struct net_device * dev)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
smc911x_ethtool_getmsglevel(struct net_device * dev)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
smc911x_ethtool_setmsglevel(struct net_device * dev,u32 level)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
smc911x_ethtool_getregslen(struct net_device * dev)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
smc911x_ethtool_getregs(struct net_device * dev,struct ethtool_regs * regs,void * buf)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
smc911x_ethtool_wait_eeprom_ready(struct net_device * dev)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
smc911x_ethtool_write_eeprom_cmd(struct net_device * dev,int cmd,int addr)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
smc911x_ethtool_read_eeprom_byte(struct net_device * dev,u8 * data)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
smc911x_ethtool_write_eeprom_byte(struct net_device * dev,u8 data)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
smc911x_ethtool_geteeprom(struct net_device * dev,struct ethtool_eeprom * eeprom,u8 * data)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
smc911x_ethtool_seteeprom(struct net_device * dev,struct ethtool_eeprom * eeprom,u8 * data)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
smc911x_ethtool_geteeprom_len(struct net_device * dev)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_drvinfo = smc911x_ethtool_getdrvinfo,
1691 .get_msglevel = smc911x_ethtool_getmsglevel,
1692 .set_msglevel = smc911x_ethtool_setmsglevel,
1693 .nway_reset = smc911x_ethtool_nwayreset,
1694 .get_link = ethtool_op_get_link,
1695 .get_regs_len = smc911x_ethtool_getregslen,
1696 .get_regs = smc911x_ethtool_getregs,
1697 .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1698 .get_eeprom = smc911x_ethtool_geteeprom,
1699 .set_eeprom = smc911x_ethtool_seteeprom,
1700 .get_link_ksettings = smc911x_ethtool_get_link_ksettings,
1701 .set_link_ksettings = smc911x_ethtool_set_link_ksettings,
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 */
smc911x_findirq(struct net_device * dev)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_validate_addr = eth_validate_addr,
1758 .ndo_set_mac_address = eth_mac_addr,
1759 #ifdef CONFIG_NET_POLL_CONTROLLER
1760 .ndo_poll_controller = smc911x_poll_controller,
1761 #endif
1762 };
1763
1764 /*
1765 * Function: smc911x_probe(unsigned long ioaddr)
1766 *
1767 * Purpose:
1768 * Tests to see if a given ioaddr points to an SMC911x chip.
1769 * Returns a 0 on success
1770 *
1771 * Algorithm:
1772 * (1) see if the endian word is OK
1773 * (1) see if I recognize the chip ID in the appropriate register
1774 *
1775 * Here I do typical initialization tasks.
1776 *
1777 * o Initialize the structure if needed
1778 * o print out my vanity message if not done so already
1779 * o print out what type of hardware is detected
1780 * o print out the ethernet address
1781 * o find the IRQ
1782 * o set up my private data
1783 * o configure the dev structure with my subroutines
1784 * o actually GRAB the irq.
1785 * o GRAB the region
1786 */
smc911x_probe(struct net_device * dev)1787 static int smc911x_probe(struct net_device *dev)
1788 {
1789 struct smc911x_local *lp = netdev_priv(dev);
1790 int i, retval;
1791 unsigned int val, chip_id, revision;
1792 const char *version_string;
1793 unsigned long irq_flags;
1794 #ifdef SMC_USE_DMA
1795 struct dma_slave_config config;
1796 dma_cap_mask_t mask;
1797 #endif
1798
1799 DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1800
1801 /* First, see if the endian word is recognized */
1802 val = SMC_GET_BYTE_TEST(lp);
1803 DBG(SMC_DEBUG_MISC, dev, "%s: endian probe returned 0x%04x\n",
1804 CARDNAME, val);
1805 if (val != 0x87654321) {
1806 netdev_err(dev, "Invalid chip endian 0x%08x\n", val);
1807 retval = -ENODEV;
1808 goto err_out;
1809 }
1810
1811 /*
1812 * check if the revision register is something that I
1813 * recognize. These might need to be added to later,
1814 * as future revisions could be added.
1815 */
1816 chip_id = SMC_GET_PN(lp);
1817 DBG(SMC_DEBUG_MISC, dev, "%s: id probe returned 0x%04x\n",
1818 CARDNAME, chip_id);
1819 for(i=0;chip_ids[i].id != 0; i++) {
1820 if (chip_ids[i].id == chip_id) break;
1821 }
1822 if (!chip_ids[i].id) {
1823 netdev_err(dev, "Unknown chip ID %04x\n", chip_id);
1824 retval = -ENODEV;
1825 goto err_out;
1826 }
1827 version_string = chip_ids[i].name;
1828
1829 revision = SMC_GET_REV(lp);
1830 DBG(SMC_DEBUG_MISC, dev, "%s: revision = 0x%04x\n", CARDNAME, revision);
1831
1832 /* At this point I'll assume that the chip is an SMC911x. */
1833 DBG(SMC_DEBUG_MISC, dev, "%s: Found a %s\n",
1834 CARDNAME, chip_ids[i].name);
1835
1836 /* Validate the TX FIFO size requested */
1837 if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1838 netdev_err(dev, "Invalid TX FIFO size requested %d\n",
1839 tx_fifo_kb);
1840 retval = -EINVAL;
1841 goto err_out;
1842 }
1843
1844 /* fill in some of the fields */
1845 lp->version = chip_ids[i].id;
1846 lp->revision = revision;
1847 lp->tx_fifo_kb = tx_fifo_kb;
1848 /* Reverse calculate the RX FIFO size from the TX */
1849 lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1850 lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1851
1852 /* Set the automatic flow control values */
1853 switch(lp->tx_fifo_kb) {
1854 /*
1855 * AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1856 * AFC_LO is AFC_HI/2
1857 * BACK_DUR is about 5uS*(AFC_LO) rounded down
1858 */
1859 case 2:/* 13440 Rx Data Fifo Size */
1860 lp->afc_cfg=0x008C46AF;break;
1861 case 3:/* 12480 Rx Data Fifo Size */
1862 lp->afc_cfg=0x0082419F;break;
1863 case 4:/* 11520 Rx Data Fifo Size */
1864 lp->afc_cfg=0x00783C9F;break;
1865 case 5:/* 10560 Rx Data Fifo Size */
1866 lp->afc_cfg=0x006E374F;break;
1867 case 6:/* 9600 Rx Data Fifo Size */
1868 lp->afc_cfg=0x0064328F;break;
1869 case 7:/* 8640 Rx Data Fifo Size */
1870 lp->afc_cfg=0x005A2D7F;break;
1871 case 8:/* 7680 Rx Data Fifo Size */
1872 lp->afc_cfg=0x0050287F;break;
1873 case 9:/* 6720 Rx Data Fifo Size */
1874 lp->afc_cfg=0x0046236F;break;
1875 case 10:/* 5760 Rx Data Fifo Size */
1876 lp->afc_cfg=0x003C1E6F;break;
1877 case 11:/* 4800 Rx Data Fifo Size */
1878 lp->afc_cfg=0x0032195F;break;
1879 /*
1880 * AFC_HI is ~1520 bytes less than RX Data Fifo Size
1881 * AFC_LO is AFC_HI/2
1882 * BACK_DUR is about 5uS*(AFC_LO) rounded down
1883 */
1884 case 12:/* 3840 Rx Data Fifo Size */
1885 lp->afc_cfg=0x0024124F;break;
1886 case 13:/* 2880 Rx Data Fifo Size */
1887 lp->afc_cfg=0x0015073F;break;
1888 case 14:/* 1920 Rx Data Fifo Size */
1889 lp->afc_cfg=0x0006032F;break;
1890 default:
1891 PRINTK(dev, "ERROR -- no AFC_CFG setting found");
1892 break;
1893 }
1894
1895 DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX, dev,
1896 "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1897 lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1898
1899 spin_lock_init(&lp->lock);
1900
1901 /* Get the MAC address */
1902 SMC_GET_MAC_ADDR(lp, dev->dev_addr);
1903
1904 /* now, reset the chip, and put it into a known state */
1905 smc911x_reset(dev);
1906
1907 /*
1908 * If dev->irq is 0, then the device has to be banged on to see
1909 * what the IRQ is.
1910 *
1911 * Specifying an IRQ is done with the assumption that the user knows
1912 * what (s)he is doing. No checking is done!!!!
1913 */
1914 if (dev->irq < 1) {
1915 int trials;
1916
1917 trials = 3;
1918 while (trials--) {
1919 dev->irq = smc911x_findirq(dev);
1920 if (dev->irq)
1921 break;
1922 /* kick the card and try again */
1923 smc911x_reset(dev);
1924 }
1925 }
1926 if (dev->irq == 0) {
1927 netdev_warn(dev, "Couldn't autodetect your IRQ. Use irq=xx.\n");
1928 retval = -ENODEV;
1929 goto err_out;
1930 }
1931 dev->irq = irq_canonicalize(dev->irq);
1932
1933 dev->netdev_ops = &smc911x_netdev_ops;
1934 dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1935 dev->ethtool_ops = &smc911x_ethtool_ops;
1936
1937 INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
1938 lp->mii.phy_id_mask = 0x1f;
1939 lp->mii.reg_num_mask = 0x1f;
1940 lp->mii.force_media = 0;
1941 lp->mii.full_duplex = 0;
1942 lp->mii.dev = dev;
1943 lp->mii.mdio_read = smc911x_phy_read;
1944 lp->mii.mdio_write = smc911x_phy_write;
1945
1946 /*
1947 * Locate the phy, if any.
1948 */
1949 smc911x_phy_detect(dev);
1950
1951 /* Set default parameters */
1952 lp->msg_enable = NETIF_MSG_LINK;
1953 lp->ctl_rfduplx = 1;
1954 lp->ctl_rspeed = 100;
1955
1956 #ifdef SMC_DYNAMIC_BUS_CONFIG
1957 irq_flags = lp->cfg.irq_flags;
1958 #else
1959 irq_flags = IRQF_SHARED | SMC_IRQ_SENSE;
1960 #endif
1961
1962 /* Grab the IRQ */
1963 retval = request_irq(dev->irq, smc911x_interrupt,
1964 irq_flags, dev->name, dev);
1965 if (retval)
1966 goto err_out;
1967
1968 #ifdef SMC_USE_DMA
1969
1970 dma_cap_zero(mask);
1971 dma_cap_set(DMA_SLAVE, mask);
1972 lp->rxdma = dma_request_channel(mask, NULL, NULL);
1973 lp->txdma = dma_request_channel(mask, NULL, NULL);
1974 lp->rxdma_active = 0;
1975 lp->txdma_active = 0;
1976
1977 memset(&config, 0, sizeof(config));
1978 config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1979 config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1980 config.src_addr = lp->physaddr + RX_DATA_FIFO;
1981 config.dst_addr = lp->physaddr + TX_DATA_FIFO;
1982 config.src_maxburst = 32;
1983 config.dst_maxburst = 32;
1984 retval = dmaengine_slave_config(lp->rxdma, &config);
1985 if (retval) {
1986 dev_err(lp->dev, "dma rx channel configuration failed: %d\n",
1987 retval);
1988 goto err_out;
1989 }
1990 retval = dmaengine_slave_config(lp->txdma, &config);
1991 if (retval) {
1992 dev_err(lp->dev, "dma tx channel configuration failed: %d\n",
1993 retval);
1994 goto err_out;
1995 }
1996 #endif
1997
1998 retval = register_netdev(dev);
1999 if (retval == 0) {
2000 /* now, print out the card info, in a short format.. */
2001 netdev_info(dev, "%s (rev %d) at %#lx IRQ %d",
2002 version_string, lp->revision,
2003 dev->base_addr, dev->irq);
2004
2005 #ifdef SMC_USE_DMA
2006 if (lp->rxdma)
2007 pr_cont(" RXDMA %p", lp->rxdma);
2008
2009 if (lp->txdma)
2010 pr_cont(" TXDMA %p", lp->txdma);
2011 #endif
2012 pr_cont("\n");
2013 if (!is_valid_ether_addr(dev->dev_addr)) {
2014 netdev_warn(dev, "Invalid ethernet MAC address. Please set using ifconfig\n");
2015 } else {
2016 /* Print the Ethernet address */
2017 netdev_info(dev, "Ethernet addr: %pM\n",
2018 dev->dev_addr);
2019 }
2020
2021 if (lp->phy_type == 0) {
2022 PRINTK(dev, "No PHY found\n");
2023 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2024 PRINTK(dev, "LAN911x Internal PHY\n");
2025 } else {
2026 PRINTK(dev, "External PHY 0x%08x\n", lp->phy_type);
2027 }
2028 }
2029
2030 err_out:
2031 #ifdef SMC_USE_DMA
2032 if (retval) {
2033 if (lp->rxdma)
2034 dma_release_channel(lp->rxdma);
2035 if (lp->txdma)
2036 dma_release_channel(lp->txdma);
2037 }
2038 #endif
2039 return retval;
2040 }
2041
2042 /*
2043 * smc911x_drv_probe(void)
2044 *
2045 * Output:
2046 * 0 --> there is a device
2047 * anything else, error
2048 */
smc911x_drv_probe(struct platform_device * pdev)2049 static int smc911x_drv_probe(struct platform_device *pdev)
2050 {
2051 struct net_device *ndev;
2052 struct resource *res;
2053 struct smc911x_local *lp;
2054 void __iomem *addr;
2055 int ret;
2056
2057 /* ndev is not valid yet, so avoid passing it in. */
2058 DBG(SMC_DEBUG_FUNC, "--> %s\n", __func__);
2059 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2060 if (!res) {
2061 ret = -ENODEV;
2062 goto out;
2063 }
2064
2065 /*
2066 * Request the regions.
2067 */
2068 if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2069 ret = -EBUSY;
2070 goto out;
2071 }
2072
2073 ndev = alloc_etherdev(sizeof(struct smc911x_local));
2074 if (!ndev) {
2075 ret = -ENOMEM;
2076 goto release_1;
2077 }
2078 SET_NETDEV_DEV(ndev, &pdev->dev);
2079
2080 ndev->dma = (unsigned char)-1;
2081 ndev->irq = platform_get_irq(pdev, 0);
2082 lp = netdev_priv(ndev);
2083 lp->netdev = ndev;
2084 #ifdef SMC_DYNAMIC_BUS_CONFIG
2085 {
2086 struct smc911x_platdata *pd = dev_get_platdata(&pdev->dev);
2087 if (!pd) {
2088 ret = -EINVAL;
2089 goto release_both;
2090 }
2091 memcpy(&lp->cfg, pd, sizeof(lp->cfg));
2092 }
2093 #endif
2094
2095 addr = ioremap(res->start, SMC911X_IO_EXTENT);
2096 if (!addr) {
2097 ret = -ENOMEM;
2098 goto release_both;
2099 }
2100
2101 platform_set_drvdata(pdev, ndev);
2102 lp->base = addr;
2103 ndev->base_addr = res->start;
2104 ret = smc911x_probe(ndev);
2105 if (ret != 0) {
2106 iounmap(addr);
2107 release_both:
2108 free_netdev(ndev);
2109 release_1:
2110 release_mem_region(res->start, SMC911X_IO_EXTENT);
2111 out:
2112 pr_info("%s: not found (%d).\n", CARDNAME, ret);
2113 }
2114 #ifdef SMC_USE_DMA
2115 else {
2116 lp->physaddr = res->start;
2117 lp->dev = &pdev->dev;
2118 }
2119 #endif
2120
2121 return ret;
2122 }
2123
smc911x_drv_remove(struct platform_device * pdev)2124 static int smc911x_drv_remove(struct platform_device *pdev)
2125 {
2126 struct net_device *ndev = platform_get_drvdata(pdev);
2127 struct smc911x_local *lp = netdev_priv(ndev);
2128 struct resource *res;
2129
2130 DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2131
2132 unregister_netdev(ndev);
2133
2134 free_irq(ndev->irq, ndev);
2135
2136 #ifdef SMC_USE_DMA
2137 {
2138 if (lp->rxdma)
2139 dma_release_channel(lp->rxdma);
2140 if (lp->txdma)
2141 dma_release_channel(lp->txdma);
2142 }
2143 #endif
2144 iounmap(lp->base);
2145 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2146 release_mem_region(res->start, SMC911X_IO_EXTENT);
2147
2148 free_netdev(ndev);
2149 return 0;
2150 }
2151
smc911x_drv_suspend(struct platform_device * dev,pm_message_t state)2152 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2153 {
2154 struct net_device *ndev = platform_get_drvdata(dev);
2155 struct smc911x_local *lp = netdev_priv(ndev);
2156
2157 DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2158 if (ndev) {
2159 if (netif_running(ndev)) {
2160 netif_device_detach(ndev);
2161 smc911x_shutdown(ndev);
2162 #if POWER_DOWN
2163 /* Set D2 - Energy detect only setting */
2164 SMC_SET_PMT_CTRL(lp, 2<<12);
2165 #endif
2166 }
2167 }
2168 return 0;
2169 }
2170
smc911x_drv_resume(struct platform_device * dev)2171 static int smc911x_drv_resume(struct platform_device *dev)
2172 {
2173 struct net_device *ndev = platform_get_drvdata(dev);
2174
2175 DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2176 if (ndev) {
2177 struct smc911x_local *lp = netdev_priv(ndev);
2178
2179 if (netif_running(ndev)) {
2180 smc911x_reset(ndev);
2181 if (lp->phy_type != 0)
2182 smc911x_phy_configure(&lp->phy_configure);
2183 smc911x_enable(ndev);
2184 netif_device_attach(ndev);
2185 }
2186 }
2187 return 0;
2188 }
2189
2190 static struct platform_driver smc911x_driver = {
2191 .probe = smc911x_drv_probe,
2192 .remove = smc911x_drv_remove,
2193 .suspend = smc911x_drv_suspend,
2194 .resume = smc911x_drv_resume,
2195 .driver = {
2196 .name = CARDNAME,
2197 },
2198 };
2199
2200 module_platform_driver(smc911x_driver);
2201
