xref: /openbmc/linux/drivers/net/ethernet/amd/a2065.c (revision b0b815a3)
1 /*
2  * Amiga Linux/68k A2065 Ethernet Driver
3  *
4  * (C) Copyright 1995-2003 by Geert Uytterhoeven <geert@linux-m68k.org>
5  *
6  * Fixes and tips by:
7  *	- Janos Farkas (CHEXUM@sparta.banki.hu)
8  *	- Jes Degn Soerensen (jds@kom.auc.dk)
9  *	- Matt Domsch (Matt_Domsch@dell.com)
10  *
11  * ----------------------------------------------------------------------------
12  *
13  * This program is based on
14  *
15  *	ariadne.?:	Amiga Linux/68k Ariadne Ethernet Driver
16  *			(C) Copyright 1995 by Geert Uytterhoeven,
17  *                                            Peter De Schrijver
18  *
19  *	lance.c:	An AMD LANCE ethernet driver for linux.
20  *			Written 1993-94 by Donald Becker.
21  *
22  *	Am79C960:	PCnet(tm)-ISA Single-Chip Ethernet Controller
23  *			Advanced Micro Devices
24  *			Publication #16907, Rev. B, Amendment/0, May 1994
25  *
26  * ----------------------------------------------------------------------------
27  *
28  * This file is subject to the terms and conditions of the GNU General Public
29  * License.  See the file COPYING in the main directory of the Linux
30  * distribution for more details.
31  *
32  * ----------------------------------------------------------------------------
33  *
34  * The A2065 is a Zorro-II board made by Commodore/Ameristar. It contains:
35  *
36  *	- an Am7990 Local Area Network Controller for Ethernet (LANCE) with
37  *	  both 10BASE-2 (thin coax) and AUI (DB-15) connectors
38  */
39 
40 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
41 
42 /*#define DEBUG*/
43 /*#define TEST_HITS*/
44 
45 #include <linux/errno.h>
46 #include <linux/netdevice.h>
47 #include <linux/etherdevice.h>
48 #include <linux/module.h>
49 #include <linux/stddef.h>
50 #include <linux/kernel.h>
51 #include <linux/interrupt.h>
52 #include <linux/ioport.h>
53 #include <linux/skbuff.h>
54 #include <linux/string.h>
55 #include <linux/init.h>
56 #include <linux/crc32.h>
57 #include <linux/zorro.h>
58 #include <linux/bitops.h>
59 
60 #include <asm/byteorder.h>
61 #include <asm/irq.h>
62 #include <asm/amigaints.h>
63 #include <asm/amigahw.h>
64 
65 #include "a2065.h"
66 
67 /* Transmit/Receive Ring Definitions */
68 
69 #define LANCE_LOG_TX_BUFFERS	(2)
70 #define LANCE_LOG_RX_BUFFERS	(4)
71 
72 #define TX_RING_SIZE		(1 << LANCE_LOG_TX_BUFFERS)
73 #define RX_RING_SIZE		(1 << LANCE_LOG_RX_BUFFERS)
74 
75 #define TX_RING_MOD_MASK	(TX_RING_SIZE - 1)
76 #define RX_RING_MOD_MASK	(RX_RING_SIZE - 1)
77 
78 #define PKT_BUF_SIZE		(1544)
79 #define RX_BUFF_SIZE            PKT_BUF_SIZE
80 #define TX_BUFF_SIZE            PKT_BUF_SIZE
81 
82 /* Layout of the Lance's RAM Buffer */
83 
84 struct lance_init_block {
85 	unsigned short mode;		/* Pre-set mode (reg. 15) */
86 	unsigned char phys_addr[6];     /* Physical ethernet address */
87 	unsigned filter[2];		/* Multicast filter. */
88 
89 	/* Receive and transmit ring base, along with extra bits. */
90 	unsigned short rx_ptr;		/* receive descriptor addr */
91 	unsigned short rx_len;		/* receive len and high addr */
92 	unsigned short tx_ptr;		/* transmit descriptor addr */
93 	unsigned short tx_len;		/* transmit len and high addr */
94 
95 	/* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
96 	struct lance_rx_desc brx_ring[RX_RING_SIZE];
97 	struct lance_tx_desc btx_ring[TX_RING_SIZE];
98 
99 	char rx_buf[RX_RING_SIZE][RX_BUFF_SIZE];
100 	char tx_buf[TX_RING_SIZE][TX_BUFF_SIZE];
101 };
102 
103 /* Private Device Data */
104 
105 struct lance_private {
106 	char *name;
107 	volatile struct lance_regs *ll;
108 	volatile struct lance_init_block *init_block;	    /* Hosts view */
109 	volatile struct lance_init_block *lance_init_block; /* Lance view */
110 
111 	int rx_new, tx_new;
112 	int rx_old, tx_old;
113 
114 	int lance_log_rx_bufs, lance_log_tx_bufs;
115 	int rx_ring_mod_mask, tx_ring_mod_mask;
116 
117 	int tpe;		      /* cable-selection is TPE */
118 	int auto_select;	      /* cable-selection by carrier */
119 	unsigned short busmaster_regval;
120 
121 	struct timer_list         multicast_timer;
122 	struct net_device	  *dev;
123 };
124 
125 #define LANCE_ADDR(x) ((int)(x) & ~0xff000000)
126 
127 /* Load the CSR registers */
load_csrs(struct lance_private * lp)128 static void load_csrs(struct lance_private *lp)
129 {
130 	volatile struct lance_regs *ll = lp->ll;
131 	volatile struct lance_init_block *aib = lp->lance_init_block;
132 	int leptr = LANCE_ADDR(aib);
133 
134 	ll->rap = LE_CSR1;
135 	ll->rdp = (leptr & 0xFFFF);
136 	ll->rap = LE_CSR2;
137 	ll->rdp = leptr >> 16;
138 	ll->rap = LE_CSR3;
139 	ll->rdp = lp->busmaster_regval;
140 
141 	/* Point back to csr0 */
142 	ll->rap = LE_CSR0;
143 }
144 
145 /* Setup the Lance Rx and Tx rings */
lance_init_ring(struct net_device * dev)146 static void lance_init_ring(struct net_device *dev)
147 {
148 	struct lance_private *lp = netdev_priv(dev);
149 	volatile struct lance_init_block *ib = lp->init_block;
150 	volatile struct lance_init_block *aib = lp->lance_init_block;
151 					/* for LANCE_ADDR computations */
152 	int leptr;
153 	int i;
154 
155 	/* Lock out other processes while setting up hardware */
156 	netif_stop_queue(dev);
157 	lp->rx_new = lp->tx_new = 0;
158 	lp->rx_old = lp->tx_old = 0;
159 
160 	ib->mode = 0;
161 
162 	/* Copy the ethernet address to the lance init block
163 	 * Note that on the sparc you need to swap the ethernet address.
164 	 */
165 	ib->phys_addr[0] = dev->dev_addr[1];
166 	ib->phys_addr[1] = dev->dev_addr[0];
167 	ib->phys_addr[2] = dev->dev_addr[3];
168 	ib->phys_addr[3] = dev->dev_addr[2];
169 	ib->phys_addr[4] = dev->dev_addr[5];
170 	ib->phys_addr[5] = dev->dev_addr[4];
171 
172 	/* Setup the Tx ring entries */
173 	netdev_dbg(dev, "TX rings:\n");
174 	for (i = 0; i <= 1 << lp->lance_log_tx_bufs; i++) {
175 		leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
176 		ib->btx_ring[i].tmd0      = leptr;
177 		ib->btx_ring[i].tmd1_hadr = leptr >> 16;
178 		ib->btx_ring[i].tmd1_bits = 0;
179 		ib->btx_ring[i].length    = 0xf000; /* The ones required by tmd2 */
180 		ib->btx_ring[i].misc      = 0;
181 		if (i < 3)
182 			netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
183 	}
184 
185 	/* Setup the Rx ring entries */
186 	netdev_dbg(dev, "RX rings:\n");
187 	for (i = 0; i < 1 << lp->lance_log_rx_bufs; i++) {
188 		leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
189 
190 		ib->brx_ring[i].rmd0      = leptr;
191 		ib->brx_ring[i].rmd1_hadr = leptr >> 16;
192 		ib->brx_ring[i].rmd1_bits = LE_R1_OWN;
193 		ib->brx_ring[i].length    = -RX_BUFF_SIZE | 0xf000;
194 		ib->brx_ring[i].mblength  = 0;
195 		if (i < 3)
196 			netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
197 	}
198 
199 	/* Setup the initialization block */
200 
201 	/* Setup rx descriptor pointer */
202 	leptr = LANCE_ADDR(&aib->brx_ring);
203 	ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
204 	ib->rx_ptr = leptr;
205 	netdev_dbg(dev, "RX ptr: %08x\n", leptr);
206 
207 	/* Setup tx descriptor pointer */
208 	leptr = LANCE_ADDR(&aib->btx_ring);
209 	ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
210 	ib->tx_ptr = leptr;
211 	netdev_dbg(dev, "TX ptr: %08x\n", leptr);
212 
213 	/* Clear the multicast filter */
214 	ib->filter[0] = 0;
215 	ib->filter[1] = 0;
216 }
217 
init_restart_lance(struct lance_private * lp)218 static int init_restart_lance(struct lance_private *lp)
219 {
220 	volatile struct lance_regs *ll = lp->ll;
221 	int i;
222 
223 	ll->rap = LE_CSR0;
224 	ll->rdp = LE_C0_INIT;
225 
226 	/* Wait for the lance to complete initialization */
227 	for (i = 0; (i < 100) && !(ll->rdp & (LE_C0_ERR | LE_C0_IDON)); i++)
228 		barrier();
229 	if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
230 		pr_err("unopened after %d ticks, csr0=%04x\n", i, ll->rdp);
231 		return -EIO;
232 	}
233 
234 	/* Clear IDON by writing a "1", enable interrupts and start lance */
235 	ll->rdp = LE_C0_IDON;
236 	ll->rdp = LE_C0_INEA | LE_C0_STRT;
237 
238 	return 0;
239 }
240 
lance_rx(struct net_device * dev)241 static int lance_rx(struct net_device *dev)
242 {
243 	struct lance_private *lp = netdev_priv(dev);
244 	volatile struct lance_init_block *ib = lp->init_block;
245 	volatile struct lance_regs *ll = lp->ll;
246 	volatile struct lance_rx_desc *rd;
247 	unsigned char bits;
248 
249 #ifdef TEST_HITS
250 	int i;
251 	char buf[RX_RING_SIZE + 1];
252 
253 	for (i = 0; i < RX_RING_SIZE; i++) {
254 		char r1_own = ib->brx_ring[i].rmd1_bits & LE_R1_OWN;
255 		if (i == lp->rx_new)
256 			buf[i] = r1_own ? '_' : 'X';
257 		else
258 			buf[i] = r1_own ? '.' : '1';
259 	}
260 	buf[RX_RING_SIZE] = 0;
261 
262 	pr_debug("RxRing TestHits: [%s]\n", buf);
263 #endif
264 
265 	ll->rdp = LE_C0_RINT | LE_C0_INEA;
266 	for (rd = &ib->brx_ring[lp->rx_new];
267 	     !((bits = rd->rmd1_bits) & LE_R1_OWN);
268 	     rd = &ib->brx_ring[lp->rx_new]) {
269 
270 		/* We got an incomplete frame? */
271 		if ((bits & LE_R1_POK) != LE_R1_POK) {
272 			dev->stats.rx_over_errors++;
273 			dev->stats.rx_errors++;
274 			continue;
275 		} else if (bits & LE_R1_ERR) {
276 			/* Count only the end frame as a rx error,
277 			 * not the beginning
278 			 */
279 			if (bits & LE_R1_BUF)
280 				dev->stats.rx_fifo_errors++;
281 			if (bits & LE_R1_CRC)
282 				dev->stats.rx_crc_errors++;
283 			if (bits & LE_R1_OFL)
284 				dev->stats.rx_over_errors++;
285 			if (bits & LE_R1_FRA)
286 				dev->stats.rx_frame_errors++;
287 			if (bits & LE_R1_EOP)
288 				dev->stats.rx_errors++;
289 		} else {
290 			int len = (rd->mblength & 0xfff) - 4;
291 			struct sk_buff *skb = netdev_alloc_skb(dev, len + 2);
292 
293 			if (!skb) {
294 				dev->stats.rx_dropped++;
295 				rd->mblength = 0;
296 				rd->rmd1_bits = LE_R1_OWN;
297 				lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
298 				return 0;
299 			}
300 
301 			skb_reserve(skb, 2);		/* 16 byte align */
302 			skb_put(skb, len);		/* make room */
303 			skb_copy_to_linear_data(skb,
304 				 (unsigned char *)&ib->rx_buf[lp->rx_new][0],
305 				 len);
306 			skb->protocol = eth_type_trans(skb, dev);
307 			netif_rx(skb);
308 			dev->stats.rx_packets++;
309 			dev->stats.rx_bytes += len;
310 		}
311 
312 		/* Return the packet to the pool */
313 		rd->mblength = 0;
314 		rd->rmd1_bits = LE_R1_OWN;
315 		lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
316 	}
317 	return 0;
318 }
319 
lance_tx(struct net_device * dev)320 static int lance_tx(struct net_device *dev)
321 {
322 	struct lance_private *lp = netdev_priv(dev);
323 	volatile struct lance_init_block *ib = lp->init_block;
324 	volatile struct lance_regs *ll = lp->ll;
325 	volatile struct lance_tx_desc *td;
326 	int i, j;
327 	int status;
328 
329 	/* csr0 is 2f3 */
330 	ll->rdp = LE_C0_TINT | LE_C0_INEA;
331 	/* csr0 is 73 */
332 
333 	j = lp->tx_old;
334 	for (i = j; i != lp->tx_new; i = j) {
335 		td = &ib->btx_ring[i];
336 
337 		/* If we hit a packet not owned by us, stop */
338 		if (td->tmd1_bits & LE_T1_OWN)
339 			break;
340 
341 		if (td->tmd1_bits & LE_T1_ERR) {
342 			status = td->misc;
343 
344 			dev->stats.tx_errors++;
345 			if (status & LE_T3_RTY)
346 				dev->stats.tx_aborted_errors++;
347 			if (status & LE_T3_LCOL)
348 				dev->stats.tx_window_errors++;
349 
350 			if (status & LE_T3_CLOS) {
351 				dev->stats.tx_carrier_errors++;
352 				if (lp->auto_select) {
353 					lp->tpe = 1 - lp->tpe;
354 					netdev_err(dev, "Carrier Lost, trying %s\n",
355 						   lp->tpe ? "TPE" : "AUI");
356 					/* Stop the lance */
357 					ll->rap = LE_CSR0;
358 					ll->rdp = LE_C0_STOP;
359 					lance_init_ring(dev);
360 					load_csrs(lp);
361 					init_restart_lance(lp);
362 					return 0;
363 				}
364 			}
365 
366 			/* buffer errors and underflows turn off
367 			 * the transmitter, so restart the adapter
368 			 */
369 			if (status & (LE_T3_BUF | LE_T3_UFL)) {
370 				dev->stats.tx_fifo_errors++;
371 
372 				netdev_err(dev, "Tx: ERR_BUF|ERR_UFL, restarting\n");
373 				/* Stop the lance */
374 				ll->rap = LE_CSR0;
375 				ll->rdp = LE_C0_STOP;
376 				lance_init_ring(dev);
377 				load_csrs(lp);
378 				init_restart_lance(lp);
379 				return 0;
380 			}
381 		} else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
382 			/* So we don't count the packet more than once. */
383 			td->tmd1_bits &= ~(LE_T1_POK);
384 
385 			/* One collision before packet was sent. */
386 			if (td->tmd1_bits & LE_T1_EONE)
387 				dev->stats.collisions++;
388 
389 			/* More than one collision, be optimistic. */
390 			if (td->tmd1_bits & LE_T1_EMORE)
391 				dev->stats.collisions += 2;
392 
393 			dev->stats.tx_packets++;
394 		}
395 
396 		j = (j + 1) & lp->tx_ring_mod_mask;
397 	}
398 	lp->tx_old = j;
399 	ll->rdp = LE_C0_TINT | LE_C0_INEA;
400 	return 0;
401 }
402 
lance_tx_buffs_avail(struct lance_private * lp)403 static int lance_tx_buffs_avail(struct lance_private *lp)
404 {
405 	if (lp->tx_old <= lp->tx_new)
406 		return lp->tx_old + lp->tx_ring_mod_mask - lp->tx_new;
407 	return lp->tx_old - lp->tx_new - 1;
408 }
409 
lance_interrupt(int irq,void * dev_id)410 static irqreturn_t lance_interrupt(int irq, void *dev_id)
411 {
412 	struct net_device *dev = dev_id;
413 	struct lance_private *lp = netdev_priv(dev);
414 	volatile struct lance_regs *ll = lp->ll;
415 	int csr0;
416 
417 	ll->rap = LE_CSR0;		/* LANCE Controller Status */
418 	csr0 = ll->rdp;
419 
420 	if (!(csr0 & LE_C0_INTR))	/* Check if any interrupt has */
421 		return IRQ_NONE;	/* been generated by the Lance. */
422 
423 	/* Acknowledge all the interrupt sources ASAP */
424 	ll->rdp = csr0 & ~(LE_C0_INEA | LE_C0_TDMD | LE_C0_STOP | LE_C0_STRT |
425 			   LE_C0_INIT);
426 
427 	if (csr0 & LE_C0_ERR) {
428 		/* Clear the error condition */
429 		ll->rdp = LE_C0_BABL | LE_C0_ERR | LE_C0_MISS | LE_C0_INEA;
430 	}
431 
432 	if (csr0 & LE_C0_RINT)
433 		lance_rx(dev);
434 
435 	if (csr0 & LE_C0_TINT)
436 		lance_tx(dev);
437 
438 	/* Log misc errors. */
439 	if (csr0 & LE_C0_BABL)
440 		dev->stats.tx_errors++;       /* Tx babble. */
441 	if (csr0 & LE_C0_MISS)
442 		dev->stats.rx_errors++;       /* Missed a Rx frame. */
443 	if (csr0 & LE_C0_MERR) {
444 		netdev_err(dev, "Bus master arbitration failure, status %04x\n",
445 			   csr0);
446 		/* Restart the chip. */
447 		ll->rdp = LE_C0_STRT;
448 	}
449 
450 	if (netif_queue_stopped(dev) && lance_tx_buffs_avail(lp) > 0)
451 		netif_wake_queue(dev);
452 
453 	ll->rap = LE_CSR0;
454 	ll->rdp = (LE_C0_BABL | LE_C0_CERR | LE_C0_MISS | LE_C0_MERR |
455 		   LE_C0_IDON | LE_C0_INEA);
456 	return IRQ_HANDLED;
457 }
458 
lance_open(struct net_device * dev)459 static int lance_open(struct net_device *dev)
460 {
461 	struct lance_private *lp = netdev_priv(dev);
462 	volatile struct lance_regs *ll = lp->ll;
463 	int ret;
464 
465 	/* Stop the Lance */
466 	ll->rap = LE_CSR0;
467 	ll->rdp = LE_C0_STOP;
468 
469 	/* Install the Interrupt handler */
470 	ret = request_irq(IRQ_AMIGA_PORTS, lance_interrupt, IRQF_SHARED,
471 			  dev->name, dev);
472 	if (ret)
473 		return ret;
474 
475 	load_csrs(lp);
476 	lance_init_ring(dev);
477 
478 	netif_start_queue(dev);
479 
480 	return init_restart_lance(lp);
481 }
482 
lance_close(struct net_device * dev)483 static int lance_close(struct net_device *dev)
484 {
485 	struct lance_private *lp = netdev_priv(dev);
486 	volatile struct lance_regs *ll = lp->ll;
487 
488 	netif_stop_queue(dev);
489 	del_timer_sync(&lp->multicast_timer);
490 
491 	/* Stop the card */
492 	ll->rap = LE_CSR0;
493 	ll->rdp = LE_C0_STOP;
494 
495 	free_irq(IRQ_AMIGA_PORTS, dev);
496 	return 0;
497 }
498 
lance_reset(struct net_device * dev)499 static inline int lance_reset(struct net_device *dev)
500 {
501 	struct lance_private *lp = netdev_priv(dev);
502 	volatile struct lance_regs *ll = lp->ll;
503 	int status;
504 
505 	/* Stop the lance */
506 	ll->rap = LE_CSR0;
507 	ll->rdp = LE_C0_STOP;
508 
509 	load_csrs(lp);
510 
511 	lance_init_ring(dev);
512 	netif_trans_update(dev); /* prevent tx timeout */
513 	netif_start_queue(dev);
514 
515 	status = init_restart_lance(lp);
516 	netdev_dbg(dev, "Lance restart=%d\n", status);
517 
518 	return status;
519 }
520 
lance_tx_timeout(struct net_device * dev,unsigned int txqueue)521 static void lance_tx_timeout(struct net_device *dev, unsigned int txqueue)
522 {
523 	struct lance_private *lp = netdev_priv(dev);
524 	volatile struct lance_regs *ll = lp->ll;
525 
526 	netdev_err(dev, "transmit timed out, status %04x, reset\n", ll->rdp);
527 	lance_reset(dev);
528 	netif_wake_queue(dev);
529 }
530 
lance_start_xmit(struct sk_buff * skb,struct net_device * dev)531 static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
532 				    struct net_device *dev)
533 {
534 	struct lance_private *lp = netdev_priv(dev);
535 	volatile struct lance_regs *ll = lp->ll;
536 	volatile struct lance_init_block *ib = lp->init_block;
537 	int entry, skblen;
538 	int status = NETDEV_TX_OK;
539 	unsigned long flags;
540 
541 	if (skb_padto(skb, ETH_ZLEN))
542 		return NETDEV_TX_OK;
543 	skblen = max_t(unsigned, skb->len, ETH_ZLEN);
544 
545 	local_irq_save(flags);
546 
547 	if (!lance_tx_buffs_avail(lp))
548 		goto out_free;
549 
550 	/* dump the packet */
551 	print_hex_dump_debug("skb->data: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
552 			     64, true);
553 
554 	entry = lp->tx_new & lp->tx_ring_mod_mask;
555 	ib->btx_ring[entry].length = (-skblen) | 0xf000;
556 	ib->btx_ring[entry].misc = 0;
557 
558 	skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen);
559 
560 	/* Now, give the packet to the lance */
561 	ib->btx_ring[entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
562 	lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;
563 	dev->stats.tx_bytes += skblen;
564 
565 	if (lance_tx_buffs_avail(lp) <= 0)
566 		netif_stop_queue(dev);
567 
568 	/* Kick the lance: transmit now */
569 	ll->rdp = LE_C0_INEA | LE_C0_TDMD;
570  out_free:
571 	dev_kfree_skb(skb);
572 
573 	local_irq_restore(flags);
574 
575 	return status;
576 }
577 
578 /* taken from the depca driver */
lance_load_multicast(struct net_device * dev)579 static void lance_load_multicast(struct net_device *dev)
580 {
581 	struct lance_private *lp = netdev_priv(dev);
582 	volatile struct lance_init_block *ib = lp->init_block;
583 	volatile u16 *mcast_table = (u16 *)&ib->filter;
584 	struct netdev_hw_addr *ha;
585 	u32 crc;
586 
587 	/* set all multicast bits */
588 	if (dev->flags & IFF_ALLMULTI) {
589 		ib->filter[0] = 0xffffffff;
590 		ib->filter[1] = 0xffffffff;
591 		return;
592 	}
593 	/* clear the multicast filter */
594 	ib->filter[0] = 0;
595 	ib->filter[1] = 0;
596 
597 	/* Add addresses */
598 	netdev_for_each_mc_addr(ha, dev) {
599 		crc = ether_crc_le(6, ha->addr);
600 		crc = crc >> 26;
601 		mcast_table[crc >> 4] |= 1 << (crc & 0xf);
602 	}
603 }
604 
lance_set_multicast(struct net_device * dev)605 static void lance_set_multicast(struct net_device *dev)
606 {
607 	struct lance_private *lp = netdev_priv(dev);
608 	volatile struct lance_init_block *ib = lp->init_block;
609 	volatile struct lance_regs *ll = lp->ll;
610 
611 	if (!netif_running(dev))
612 		return;
613 
614 	if (lp->tx_old != lp->tx_new) {
615 		mod_timer(&lp->multicast_timer, jiffies + 4);
616 		netif_wake_queue(dev);
617 		return;
618 	}
619 
620 	netif_stop_queue(dev);
621 
622 	ll->rap = LE_CSR0;
623 	ll->rdp = LE_C0_STOP;
624 	lance_init_ring(dev);
625 
626 	if (dev->flags & IFF_PROMISC) {
627 		ib->mode |= LE_MO_PROM;
628 	} else {
629 		ib->mode &= ~LE_MO_PROM;
630 		lance_load_multicast(dev);
631 	}
632 	load_csrs(lp);
633 	init_restart_lance(lp);
634 	netif_wake_queue(dev);
635 }
636 
lance_set_multicast_retry(struct timer_list * t)637 static void lance_set_multicast_retry(struct timer_list *t)
638 {
639 	struct lance_private *lp = from_timer(lp, t, multicast_timer);
640 
641 	lance_set_multicast(lp->dev);
642 }
643 
644 static int a2065_init_one(struct zorro_dev *z,
645 			  const struct zorro_device_id *ent);
646 static void a2065_remove_one(struct zorro_dev *z);
647 
648 
649 static const struct zorro_device_id a2065_zorro_tbl[] = {
650 	{ ZORRO_PROD_CBM_A2065_1 },
651 	{ ZORRO_PROD_CBM_A2065_2 },
652 	{ ZORRO_PROD_AMERISTAR_A2065 },
653 	{ 0 }
654 };
655 MODULE_DEVICE_TABLE(zorro, a2065_zorro_tbl);
656 
657 static struct zorro_driver a2065_driver = {
658 	.name		= "a2065",
659 	.id_table	= a2065_zorro_tbl,
660 	.probe		= a2065_init_one,
661 	.remove		= a2065_remove_one,
662 };
663 
664 static const struct net_device_ops lance_netdev_ops = {
665 	.ndo_open		= lance_open,
666 	.ndo_stop		= lance_close,
667 	.ndo_start_xmit		= lance_start_xmit,
668 	.ndo_tx_timeout		= lance_tx_timeout,
669 	.ndo_set_rx_mode	= lance_set_multicast,
670 	.ndo_validate_addr	= eth_validate_addr,
671 	.ndo_set_mac_address	= eth_mac_addr,
672 };
673 
a2065_init_one(struct zorro_dev * z,const struct zorro_device_id * ent)674 static int a2065_init_one(struct zorro_dev *z,
675 			  const struct zorro_device_id *ent)
676 {
677 	struct net_device *dev;
678 	struct lance_private *priv;
679 	unsigned long board = z->resource.start;
680 	unsigned long base_addr = board + A2065_LANCE;
681 	unsigned long mem_start = board + A2065_RAM;
682 	struct resource *r1, *r2;
683 	u8 addr[ETH_ALEN];
684 	u32 serial;
685 	int err;
686 
687 	r1 = request_mem_region(base_addr, sizeof(struct lance_regs),
688 				"Am7990");
689 	if (!r1)
690 		return -EBUSY;
691 	r2 = request_mem_region(mem_start, A2065_RAM_SIZE, "RAM");
692 	if (!r2) {
693 		release_mem_region(base_addr, sizeof(struct lance_regs));
694 		return -EBUSY;
695 	}
696 
697 	dev = alloc_etherdev(sizeof(struct lance_private));
698 	if (!dev) {
699 		release_mem_region(base_addr, sizeof(struct lance_regs));
700 		release_mem_region(mem_start, A2065_RAM_SIZE);
701 		return -ENOMEM;
702 	}
703 
704 	priv = netdev_priv(dev);
705 
706 	r1->name = dev->name;
707 	r2->name = dev->name;
708 
709 	serial = be32_to_cpu(z->rom.er_SerialNumber);
710 	addr[0] = 0x00;
711 	if (z->id != ZORRO_PROD_AMERISTAR_A2065) {	/* Commodore */
712 		addr[1] = 0x80;
713 		addr[2] = 0x10;
714 	} else {					/* Ameristar */
715 		addr[1] = 0x00;
716 		addr[2] = 0x9f;
717 	}
718 	addr[3] = (serial >> 16) & 0xff;
719 	addr[4] = (serial >> 8) & 0xff;
720 	addr[5] = serial & 0xff;
721 	eth_hw_addr_set(dev, addr);
722 	dev->base_addr = (unsigned long)ZTWO_VADDR(base_addr);
723 	dev->mem_start = (unsigned long)ZTWO_VADDR(mem_start);
724 	dev->mem_end = dev->mem_start + A2065_RAM_SIZE;
725 
726 	priv->ll = (volatile struct lance_regs *)dev->base_addr;
727 	priv->init_block = (struct lance_init_block *)dev->mem_start;
728 	priv->lance_init_block = (struct lance_init_block *)A2065_RAM;
729 	priv->auto_select = 0;
730 	priv->busmaster_regval = LE_C3_BSWP;
731 
732 	priv->lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
733 	priv->lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
734 	priv->rx_ring_mod_mask = RX_RING_MOD_MASK;
735 	priv->tx_ring_mod_mask = TX_RING_MOD_MASK;
736 	priv->dev = dev;
737 
738 	dev->netdev_ops = &lance_netdev_ops;
739 	dev->watchdog_timeo = 5*HZ;
740 	dev->dma = 0;
741 
742 	timer_setup(&priv->multicast_timer, lance_set_multicast_retry, 0);
743 
744 	err = register_netdev(dev);
745 	if (err) {
746 		release_mem_region(base_addr, sizeof(struct lance_regs));
747 		release_mem_region(mem_start, A2065_RAM_SIZE);
748 		free_netdev(dev);
749 		return err;
750 	}
751 	zorro_set_drvdata(z, dev);
752 
753 	netdev_info(dev, "A2065 at 0x%08lx, Ethernet Address %pM\n",
754 		    board, dev->dev_addr);
755 
756 	return 0;
757 }
758 
759 
a2065_remove_one(struct zorro_dev * z)760 static void a2065_remove_one(struct zorro_dev *z)
761 {
762 	struct net_device *dev = zorro_get_drvdata(z);
763 
764 	unregister_netdev(dev);
765 	release_mem_region(ZTWO_PADDR(dev->base_addr),
766 			   sizeof(struct lance_regs));
767 	release_mem_region(ZTWO_PADDR(dev->mem_start), A2065_RAM_SIZE);
768 	free_netdev(dev);
769 }
770 
a2065_init_module(void)771 static int __init a2065_init_module(void)
772 {
773 	return zorro_register_driver(&a2065_driver);
774 }
775 
a2065_cleanup_module(void)776 static void __exit a2065_cleanup_module(void)
777 {
778 	zorro_unregister_driver(&a2065_driver);
779 }
780 
781 module_init(a2065_init_module);
782 module_exit(a2065_cleanup_module);
783 
784 MODULE_LICENSE("GPL");
785