1 // SPDX-License-Identifier: GPL-2.0-only
2 /* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
3  * lance.c: Linux/Sparc/Lance driver
4  *
5  *	Written 1995, 1996 by Miguel de Icaza
6  * Sources:
7  *	The Linux  depca driver
8  *	The Linux  lance driver.
9  *	The Linux  skeleton driver.
10  *	The NetBSD Sparc/Lance driver.
11  *	Theo de Raadt (deraadt@openbsd.org)
12  *	NCR92C990 Lan Controller manual
13  *
14  * 1.4:
15  *	Added support to run with a ledma on the Sun4m
16  *
17  * 1.5:
18  *	Added multiple card detection.
19  *
20  *	 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
21  *		  (ecd@skynet.be)
22  *
23  *	 5/15/96: auto carrier detection on sun4m by Eddie C. Dost
24  *		  (ecd@skynet.be)
25  *
26  *	 5/17/96: lebuffer on scsi/ether cards now work David S. Miller
27  *		  (davem@caip.rutgers.edu)
28  *
29  *	 5/29/96: override option 'tpe-link-test?', if it is 'false', as
30  *		  this disables auto carrier detection on sun4m. Eddie C. Dost
31  *		  (ecd@skynet.be)
32  *
33  * 1.7:
34  *	 6/26/96: Bug fix for multiple ledmas, miguel.
35  *
36  * 1.8:
37  *		  Stole multicast code from depca.c, fixed lance_tx.
38  *
39  * 1.9:
40  *	 8/21/96: Fixed the multicast code (Pedro Roque)
41  *
42  *	 8/28/96: Send fake packet in lance_open() if auto_select is true,
43  *		  so we can detect the carrier loss condition in time.
44  *		  Eddie C. Dost (ecd@skynet.be)
45  *
46  *	 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
47  *		  MNA trap during chksum_partial_copy(). (ecd@skynet.be)
48  *
49  *	11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
50  *
51  *	12/22/96: Don't loop forever in lance_rx() on incomplete packets.
52  *		  This was the sun4c killer. Shit, stupid bug.
53  *		  (ecd@skynet.be)
54  *
55  * 1.10:
56  *	 1/26/97: Modularize driver. (ecd@skynet.be)
57  *
58  * 1.11:
59  *	12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
60  *
61  * 1.12:
62  * 	 11/3/99: Fixed SMP race in lance_start_xmit found by davem.
63  * 	          Anton Blanchard (anton@progsoc.uts.edu.au)
64  * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
65  *		  David S. Miller (davem@redhat.com)
66  * 2.01:
67  *      11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
68  *
69  */
70 
71 #undef DEBUG_DRIVER
72 
73 static char lancestr[] = "LANCE";
74 
75 #include <linux/module.h>
76 #include <linux/kernel.h>
77 #include <linux/types.h>
78 #include <linux/fcntl.h>
79 #include <linux/interrupt.h>
80 #include <linux/ioport.h>
81 #include <linux/in.h>
82 #include <linux/string.h>
83 #include <linux/delay.h>
84 #include <linux/crc32.h>
85 #include <linux/errno.h>
86 #include <linux/socket.h> /* Used for the temporal inet entries and routing */
87 #include <linux/route.h>
88 #include <linux/netdevice.h>
89 #include <linux/etherdevice.h>
90 #include <linux/skbuff.h>
91 #include <linux/ethtool.h>
92 #include <linux/bitops.h>
93 #include <linux/dma-mapping.h>
94 #include <linux/of.h>
95 #include <linux/of_device.h>
96 #include <linux/gfp.h>
97 
98 #include <asm/io.h>
99 #include <asm/dma.h>
100 #include <asm/pgtable.h>
101 #include <asm/byteorder.h>	/* Used by the checksum routines */
102 #include <asm/idprom.h>
103 #include <asm/prom.h>
104 #include <asm/auxio.h>		/* For tpe-link-test? setting */
105 #include <asm/irq.h>
106 
107 #define DRV_NAME	"sunlance"
108 #define DRV_VERSION	"2.02"
109 #define DRV_RELDATE	"8/24/03"
110 #define DRV_AUTHOR	"Miguel de Icaza (miguel@nuclecu.unam.mx)"
111 
112 static char version[] =
113 	DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
114 
115 MODULE_VERSION(DRV_VERSION);
116 MODULE_AUTHOR(DRV_AUTHOR);
117 MODULE_DESCRIPTION("Sun Lance ethernet driver");
118 MODULE_LICENSE("GPL");
119 
120 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
121 #ifndef LANCE_LOG_TX_BUFFERS
122 #define LANCE_LOG_TX_BUFFERS 4
123 #define LANCE_LOG_RX_BUFFERS 4
124 #endif
125 
126 #define LE_CSR0 0
127 #define LE_CSR1 1
128 #define LE_CSR2 2
129 #define LE_CSR3 3
130 
131 #define LE_MO_PROM      0x8000  /* Enable promiscuous mode */
132 
133 #define	LE_C0_ERR	0x8000	/* Error: set if BAB, SQE, MISS or ME is set */
134 #define	LE_C0_BABL	0x4000	/* BAB:  Babble: tx timeout. */
135 #define	LE_C0_CERR	0x2000	/* SQE:  Signal quality error */
136 #define	LE_C0_MISS	0x1000	/* MISS: Missed a packet */
137 #define	LE_C0_MERR	0x0800	/* ME:   Memory error */
138 #define	LE_C0_RINT	0x0400	/* Received interrupt */
139 #define	LE_C0_TINT	0x0200	/* Transmitter Interrupt */
140 #define	LE_C0_IDON	0x0100	/* IFIN: Init finished. */
141 #define	LE_C0_INTR	0x0080	/* Interrupt or error */
142 #define	LE_C0_INEA	0x0040	/* Interrupt enable */
143 #define	LE_C0_RXON	0x0020	/* Receiver on */
144 #define	LE_C0_TXON	0x0010	/* Transmitter on */
145 #define	LE_C0_TDMD	0x0008	/* Transmitter demand */
146 #define	LE_C0_STOP	0x0004	/* Stop the card */
147 #define	LE_C0_STRT	0x0002	/* Start the card */
148 #define	LE_C0_INIT	0x0001	/* Init the card */
149 
150 #define	LE_C3_BSWP	0x4     /* SWAP */
151 #define	LE_C3_ACON	0x2	/* ALE Control */
152 #define	LE_C3_BCON	0x1	/* Byte control */
153 
154 /* Receive message descriptor 1 */
155 #define LE_R1_OWN       0x80    /* Who owns the entry */
156 #define LE_R1_ERR       0x40    /* Error: if FRA, OFL, CRC or BUF is set */
157 #define LE_R1_FRA       0x20    /* FRA: Frame error */
158 #define LE_R1_OFL       0x10    /* OFL: Frame overflow */
159 #define LE_R1_CRC       0x08    /* CRC error */
160 #define LE_R1_BUF       0x04    /* BUF: Buffer error */
161 #define LE_R1_SOP       0x02    /* Start of packet */
162 #define LE_R1_EOP       0x01    /* End of packet */
163 #define LE_R1_POK       0x03    /* Packet is complete: SOP + EOP */
164 
165 #define LE_T1_OWN       0x80    /* Lance owns the packet */
166 #define LE_T1_ERR       0x40    /* Error summary */
167 #define LE_T1_EMORE     0x10    /* Error: more than one retry needed */
168 #define LE_T1_EONE      0x08    /* Error: one retry needed */
169 #define LE_T1_EDEF      0x04    /* Error: deferred */
170 #define LE_T1_SOP       0x02    /* Start of packet */
171 #define LE_T1_EOP       0x01    /* End of packet */
172 #define LE_T1_POK	0x03	/* Packet is complete: SOP + EOP */
173 
174 #define LE_T3_BUF       0x8000  /* Buffer error */
175 #define LE_T3_UFL       0x4000  /* Error underflow */
176 #define LE_T3_LCOL      0x1000  /* Error late collision */
177 #define LE_T3_CLOS      0x0800  /* Error carrier loss */
178 #define LE_T3_RTY       0x0400  /* Error retry */
179 #define LE_T3_TDR       0x03ff  /* Time Domain Reflectometry counter */
180 
181 #define TX_RING_SIZE			(1 << (LANCE_LOG_TX_BUFFERS))
182 #define TX_RING_MOD_MASK		(TX_RING_SIZE - 1)
183 #define TX_RING_LEN_BITS		((LANCE_LOG_TX_BUFFERS) << 29)
184 #define TX_NEXT(__x)			(((__x)+1) & TX_RING_MOD_MASK)
185 
186 #define RX_RING_SIZE			(1 << (LANCE_LOG_RX_BUFFERS))
187 #define RX_RING_MOD_MASK		(RX_RING_SIZE - 1)
188 #define RX_RING_LEN_BITS		((LANCE_LOG_RX_BUFFERS) << 29)
189 #define RX_NEXT(__x)			(((__x)+1) & RX_RING_MOD_MASK)
190 
191 #define PKT_BUF_SZ		1544
192 #define RX_BUFF_SIZE            PKT_BUF_SZ
193 #define TX_BUFF_SIZE            PKT_BUF_SZ
194 
195 struct lance_rx_desc {
196 	u16	rmd0;		/* low address of packet */
197 	u8	rmd1_bits;	/* descriptor bits */
198 	u8	rmd1_hadr;	/* high address of packet */
199 	s16	length;		/* This length is 2s complement (negative)!
200 				 * Buffer length
201 				 */
202 	u16	mblength;	/* This is the actual number of bytes received */
203 };
204 
205 struct lance_tx_desc {
206 	u16	tmd0;		/* low address of packet */
207 	u8 	tmd1_bits;	/* descriptor bits */
208 	u8 	tmd1_hadr;	/* high address of packet */
209 	s16 	length;		/* Length is 2s complement (negative)! */
210 	u16 	misc;
211 };
212 
213 /* The LANCE initialization block, described in databook. */
214 /* On the Sparc, this block should be on a DMA region     */
215 struct lance_init_block {
216 	u16	mode;		/* Pre-set mode (reg. 15) */
217 	u8	phys_addr[6];	/* Physical ethernet address */
218 	u32	filter[2];	/* Multicast filter. */
219 
220 	/* Receive and transmit ring base, along with extra bits. */
221 	u16	rx_ptr;		/* receive descriptor addr */
222 	u16	rx_len;		/* receive len and high addr */
223 	u16	tx_ptr;		/* transmit descriptor addr */
224 	u16	tx_len;		/* transmit len and high addr */
225 
226 	/* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
227 	struct lance_rx_desc brx_ring[RX_RING_SIZE];
228 	struct lance_tx_desc btx_ring[TX_RING_SIZE];
229 
230 	u8	tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
231 	u8	pad[2];		/* align rx_buf for copy_and_sum(). */
232 	u8	rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
233 };
234 
235 #define libdesc_offset(rt, elem) \
236 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
237 
238 #define libbuff_offset(rt, elem) \
239 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
240 
241 struct lance_private {
242 	void __iomem	*lregs;		/* Lance RAP/RDP regs.		*/
243 	void __iomem	*dregs;		/* DMA controller regs.		*/
244 	struct lance_init_block __iomem *init_block_iomem;
245 	struct lance_init_block *init_block_mem;
246 
247 	spinlock_t	lock;
248 
249 	int		rx_new, tx_new;
250 	int		rx_old, tx_old;
251 
252 	struct platform_device *ledma;	/* If set this points to ledma	*/
253 	char		tpe;		/* cable-selection is TPE	*/
254 	char		auto_select;	/* cable-selection by carrier	*/
255 	char		burst_sizes;	/* ledma SBus burst sizes	*/
256 	char		pio_buffer;	/* init block in PIO space?	*/
257 
258 	unsigned short	busmaster_regval;
259 
260 	void (*init_ring)(struct net_device *);
261 	void (*rx)(struct net_device *);
262 	void (*tx)(struct net_device *);
263 
264 	char	       	       *name;
265 	dma_addr_t		init_block_dvma;
266 	struct net_device      *dev;		  /* Backpointer	*/
267 	struct platform_device       *op;
268 	struct platform_device       *lebuffer;
269 	struct timer_list       multicast_timer;
270 };
271 
272 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
273 			lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
274 			lp->tx_old - lp->tx_new-1)
275 
276 /* Lance registers. */
277 #define RDP		0x00UL		/* register data port		*/
278 #define RAP		0x02UL		/* register address port	*/
279 #define LANCE_REG_SIZE	0x04UL
280 
281 #define STOP_LANCE(__lp) \
282 do {	void __iomem *__base = (__lp)->lregs; \
283 	sbus_writew(LE_CSR0,	__base + RAP); \
284 	sbus_writew(LE_C0_STOP,	__base + RDP); \
285 } while (0)
286 
287 int sparc_lance_debug = 2;
288 
289 /* The Lance uses 24 bit addresses */
290 /* On the Sun4c the DVMA will provide the remaining bytes for us */
291 /* On the Sun4m we have to instruct the ledma to provide them    */
292 /* Even worse, on scsi/ether SBUS cards, the init block and the
293  * transmit/receive buffers are addresses as offsets from absolute
294  * zero on the lebuffer PIO area. -DaveM
295  */
296 
297 #define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
298 
299 /* Load the CSR registers */
300 static void load_csrs(struct lance_private *lp)
301 {
302 	u32 leptr;
303 
304 	if (lp->pio_buffer)
305 		leptr = 0;
306 	else
307 		leptr = LANCE_ADDR(lp->init_block_dvma);
308 
309 	sbus_writew(LE_CSR1,		  lp->lregs + RAP);
310 	sbus_writew(leptr & 0xffff,	  lp->lregs + RDP);
311 	sbus_writew(LE_CSR2,		  lp->lregs + RAP);
312 	sbus_writew(leptr >> 16,	  lp->lregs + RDP);
313 	sbus_writew(LE_CSR3,		  lp->lregs + RAP);
314 	sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
315 
316 	/* Point back to csr0 */
317 	sbus_writew(LE_CSR0, lp->lregs + RAP);
318 }
319 
320 /* Setup the Lance Rx and Tx rings */
321 static void lance_init_ring_dvma(struct net_device *dev)
322 {
323 	struct lance_private *lp = netdev_priv(dev);
324 	struct lance_init_block *ib = lp->init_block_mem;
325 	dma_addr_t aib = lp->init_block_dvma;
326 	__u32 leptr;
327 	int i;
328 
329 	/* Lock out other processes while setting up hardware */
330 	netif_stop_queue(dev);
331 	lp->rx_new = lp->tx_new = 0;
332 	lp->rx_old = lp->tx_old = 0;
333 
334 	/* Copy the ethernet address to the lance init block
335 	 * Note that on the sparc you need to swap the ethernet address.
336 	 */
337 	ib->phys_addr [0] = dev->dev_addr [1];
338 	ib->phys_addr [1] = dev->dev_addr [0];
339 	ib->phys_addr [2] = dev->dev_addr [3];
340 	ib->phys_addr [3] = dev->dev_addr [2];
341 	ib->phys_addr [4] = dev->dev_addr [5];
342 	ib->phys_addr [5] = dev->dev_addr [4];
343 
344 	/* Setup the Tx ring entries */
345 	for (i = 0; i < TX_RING_SIZE; i++) {
346 		leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
347 		ib->btx_ring [i].tmd0      = leptr;
348 		ib->btx_ring [i].tmd1_hadr = leptr >> 16;
349 		ib->btx_ring [i].tmd1_bits = 0;
350 		ib->btx_ring [i].length    = 0xf000; /* The ones required by tmd2 */
351 		ib->btx_ring [i].misc      = 0;
352 	}
353 
354 	/* Setup the Rx ring entries */
355 	for (i = 0; i < RX_RING_SIZE; i++) {
356 		leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
357 
358 		ib->brx_ring [i].rmd0      = leptr;
359 		ib->brx_ring [i].rmd1_hadr = leptr >> 16;
360 		ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
361 		ib->brx_ring [i].length    = -RX_BUFF_SIZE | 0xf000;
362 		ib->brx_ring [i].mblength  = 0;
363 	}
364 
365 	/* Setup the initialization block */
366 
367 	/* Setup rx descriptor pointer */
368 	leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
369 	ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
370 	ib->rx_ptr = leptr;
371 
372 	/* Setup tx descriptor pointer */
373 	leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
374 	ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
375 	ib->tx_ptr = leptr;
376 }
377 
378 static void lance_init_ring_pio(struct net_device *dev)
379 {
380 	struct lance_private *lp = netdev_priv(dev);
381 	struct lance_init_block __iomem *ib = lp->init_block_iomem;
382 	u32 leptr;
383 	int i;
384 
385 	/* Lock out other processes while setting up hardware */
386 	netif_stop_queue(dev);
387 	lp->rx_new = lp->tx_new = 0;
388 	lp->rx_old = lp->tx_old = 0;
389 
390 	/* Copy the ethernet address to the lance init block
391 	 * Note that on the sparc you need to swap the ethernet address.
392 	 */
393 	sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
394 	sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
395 	sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
396 	sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
397 	sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
398 	sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
399 
400 	/* Setup the Tx ring entries */
401 	for (i = 0; i < TX_RING_SIZE; i++) {
402 		leptr = libbuff_offset(tx_buf, i);
403 		sbus_writew(leptr,	&ib->btx_ring [i].tmd0);
404 		sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
405 		sbus_writeb(0,		&ib->btx_ring [i].tmd1_bits);
406 
407 		/* The ones required by tmd2 */
408 		sbus_writew(0xf000,	&ib->btx_ring [i].length);
409 		sbus_writew(0,		&ib->btx_ring [i].misc);
410 	}
411 
412 	/* Setup the Rx ring entries */
413 	for (i = 0; i < RX_RING_SIZE; i++) {
414 		leptr = libbuff_offset(rx_buf, i);
415 
416 		sbus_writew(leptr,	&ib->brx_ring [i].rmd0);
417 		sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
418 		sbus_writeb(LE_R1_OWN,	&ib->brx_ring [i].rmd1_bits);
419 		sbus_writew(-RX_BUFF_SIZE|0xf000,
420 			    &ib->brx_ring [i].length);
421 		sbus_writew(0,		&ib->brx_ring [i].mblength);
422 	}
423 
424 	/* Setup the initialization block */
425 
426 	/* Setup rx descriptor pointer */
427 	leptr = libdesc_offset(brx_ring, 0);
428 	sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
429 		    &ib->rx_len);
430 	sbus_writew(leptr, &ib->rx_ptr);
431 
432 	/* Setup tx descriptor pointer */
433 	leptr = libdesc_offset(btx_ring, 0);
434 	sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
435 		    &ib->tx_len);
436 	sbus_writew(leptr, &ib->tx_ptr);
437 }
438 
439 static void init_restart_ledma(struct lance_private *lp)
440 {
441 	u32 csr = sbus_readl(lp->dregs + DMA_CSR);
442 
443 	if (!(csr & DMA_HNDL_ERROR)) {
444 		/* E-Cache draining */
445 		while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
446 			barrier();
447 	}
448 
449 	csr = sbus_readl(lp->dregs + DMA_CSR);
450 	csr &= ~DMA_E_BURSTS;
451 	if (lp->burst_sizes & DMA_BURST32)
452 		csr |= DMA_E_BURST32;
453 	else
454 		csr |= DMA_E_BURST16;
455 
456 	csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
457 
458 	if (lp->tpe)
459 		csr |= DMA_EN_ENETAUI;
460 	else
461 		csr &= ~DMA_EN_ENETAUI;
462 	udelay(20);
463 	sbus_writel(csr, lp->dregs + DMA_CSR);
464 	udelay(200);
465 }
466 
467 static int init_restart_lance(struct lance_private *lp)
468 {
469 	u16 regval = 0;
470 	int i;
471 
472 	if (lp->dregs)
473 		init_restart_ledma(lp);
474 
475 	sbus_writew(LE_CSR0,	lp->lregs + RAP);
476 	sbus_writew(LE_C0_INIT,	lp->lregs + RDP);
477 
478 	/* Wait for the lance to complete initialization */
479 	for (i = 0; i < 100; i++) {
480 		regval = sbus_readw(lp->lregs + RDP);
481 
482 		if (regval & (LE_C0_ERR | LE_C0_IDON))
483 			break;
484 		barrier();
485 	}
486 	if (i == 100 || (regval & LE_C0_ERR)) {
487 		printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
488 		       i, regval);
489 		if (lp->dregs)
490 			printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
491 		return -1;
492 	}
493 
494 	/* Clear IDON by writing a "1", enable interrupts and start lance */
495 	sbus_writew(LE_C0_IDON,			lp->lregs + RDP);
496 	sbus_writew(LE_C0_INEA | LE_C0_STRT,	lp->lregs + RDP);
497 
498 	if (lp->dregs) {
499 		u32 csr = sbus_readl(lp->dregs + DMA_CSR);
500 
501 		csr |= DMA_INT_ENAB;
502 		sbus_writel(csr, lp->dregs + DMA_CSR);
503 	}
504 
505 	return 0;
506 }
507 
508 static void lance_rx_dvma(struct net_device *dev)
509 {
510 	struct lance_private *lp = netdev_priv(dev);
511 	struct lance_init_block *ib = lp->init_block_mem;
512 	struct lance_rx_desc *rd;
513 	u8 bits;
514 	int len, entry = lp->rx_new;
515 	struct sk_buff *skb;
516 
517 	for (rd = &ib->brx_ring [entry];
518 	     !((bits = rd->rmd1_bits) & LE_R1_OWN);
519 	     rd = &ib->brx_ring [entry]) {
520 
521 		/* We got an incomplete frame? */
522 		if ((bits & LE_R1_POK) != LE_R1_POK) {
523 			dev->stats.rx_over_errors++;
524 			dev->stats.rx_errors++;
525 		} else if (bits & LE_R1_ERR) {
526 			/* Count only the end frame as a rx error,
527 			 * not the beginning
528 			 */
529 			if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
530 			if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
531 			if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
532 			if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
533 			if (bits & LE_R1_EOP) dev->stats.rx_errors++;
534 		} else {
535 			len = (rd->mblength & 0xfff) - 4;
536 			skb = netdev_alloc_skb(dev, len + 2);
537 
538 			if (skb == NULL) {
539 				dev->stats.rx_dropped++;
540 				rd->mblength = 0;
541 				rd->rmd1_bits = LE_R1_OWN;
542 				lp->rx_new = RX_NEXT(entry);
543 				return;
544 			}
545 
546 			dev->stats.rx_bytes += len;
547 
548 			skb_reserve(skb, 2);		/* 16 byte align */
549 			skb_put(skb, len);		/* make room */
550 			skb_copy_to_linear_data(skb,
551 					 (unsigned char *)&(ib->rx_buf [entry][0]),
552 					 len);
553 			skb->protocol = eth_type_trans(skb, dev);
554 			netif_rx(skb);
555 			dev->stats.rx_packets++;
556 		}
557 
558 		/* Return the packet to the pool */
559 		rd->mblength = 0;
560 		rd->rmd1_bits = LE_R1_OWN;
561 		entry = RX_NEXT(entry);
562 	}
563 
564 	lp->rx_new = entry;
565 }
566 
567 static void lance_tx_dvma(struct net_device *dev)
568 {
569 	struct lance_private *lp = netdev_priv(dev);
570 	struct lance_init_block *ib = lp->init_block_mem;
571 	int i, j;
572 
573 	spin_lock(&lp->lock);
574 
575 	j = lp->tx_old;
576 	for (i = j; i != lp->tx_new; i = j) {
577 		struct lance_tx_desc *td = &ib->btx_ring [i];
578 		u8 bits = td->tmd1_bits;
579 
580 		/* If we hit a packet not owned by us, stop */
581 		if (bits & LE_T1_OWN)
582 			break;
583 
584 		if (bits & LE_T1_ERR) {
585 			u16 status = td->misc;
586 
587 			dev->stats.tx_errors++;
588 			if (status & LE_T3_RTY)  dev->stats.tx_aborted_errors++;
589 			if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
590 
591 			if (status & LE_T3_CLOS) {
592 				dev->stats.tx_carrier_errors++;
593 				if (lp->auto_select) {
594 					lp->tpe = 1 - lp->tpe;
595 					printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
596 					       dev->name, lp->tpe?"TPE":"AUI");
597 					STOP_LANCE(lp);
598 					lp->init_ring(dev);
599 					load_csrs(lp);
600 					init_restart_lance(lp);
601 					goto out;
602 				}
603 			}
604 
605 			/* Buffer errors and underflows turn off the
606 			 * transmitter, restart the adapter.
607 			 */
608 			if (status & (LE_T3_BUF|LE_T3_UFL)) {
609 				dev->stats.tx_fifo_errors++;
610 
611 				printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
612 				       dev->name);
613 				STOP_LANCE(lp);
614 				lp->init_ring(dev);
615 				load_csrs(lp);
616 				init_restart_lance(lp);
617 				goto out;
618 			}
619 		} else if ((bits & LE_T1_POK) == LE_T1_POK) {
620 			/*
621 			 * So we don't count the packet more than once.
622 			 */
623 			td->tmd1_bits = bits & ~(LE_T1_POK);
624 
625 			/* One collision before packet was sent. */
626 			if (bits & LE_T1_EONE)
627 				dev->stats.collisions++;
628 
629 			/* More than one collision, be optimistic. */
630 			if (bits & LE_T1_EMORE)
631 				dev->stats.collisions += 2;
632 
633 			dev->stats.tx_packets++;
634 		}
635 
636 		j = TX_NEXT(j);
637 	}
638 	lp->tx_old = j;
639 out:
640 	if (netif_queue_stopped(dev) &&
641 	    TX_BUFFS_AVAIL > 0)
642 		netif_wake_queue(dev);
643 
644 	spin_unlock(&lp->lock);
645 }
646 
647 static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
648 {
649 	u16 *p16 = (u16 *) skb->data;
650 	u32 *p32;
651 	u8 *p8;
652 	void __iomem *pbuf = piobuf;
653 
654 	/* We know here that both src and dest are on a 16bit boundary. */
655 	*p16++ = sbus_readw(pbuf);
656 	p32 = (u32 *) p16;
657 	pbuf += 2;
658 	len -= 2;
659 
660 	while (len >= 4) {
661 		*p32++ = sbus_readl(pbuf);
662 		pbuf += 4;
663 		len -= 4;
664 	}
665 	p8 = (u8 *) p32;
666 	if (len >= 2) {
667 		p16 = (u16 *) p32;
668 		*p16++ = sbus_readw(pbuf);
669 		pbuf += 2;
670 		len -= 2;
671 		p8 = (u8 *) p16;
672 	}
673 	if (len >= 1)
674 		*p8 = sbus_readb(pbuf);
675 }
676 
677 static void lance_rx_pio(struct net_device *dev)
678 {
679 	struct lance_private *lp = netdev_priv(dev);
680 	struct lance_init_block __iomem *ib = lp->init_block_iomem;
681 	struct lance_rx_desc __iomem *rd;
682 	unsigned char bits;
683 	int len, entry;
684 	struct sk_buff *skb;
685 
686 	entry = lp->rx_new;
687 	for (rd = &ib->brx_ring [entry];
688 	     !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
689 	     rd = &ib->brx_ring [entry]) {
690 
691 		/* We got an incomplete frame? */
692 		if ((bits & LE_R1_POK) != LE_R1_POK) {
693 			dev->stats.rx_over_errors++;
694 			dev->stats.rx_errors++;
695 		} else if (bits & LE_R1_ERR) {
696 			/* Count only the end frame as a rx error,
697 			 * not the beginning
698 			 */
699 			if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
700 			if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
701 			if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
702 			if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
703 			if (bits & LE_R1_EOP) dev->stats.rx_errors++;
704 		} else {
705 			len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
706 			skb = netdev_alloc_skb(dev, len + 2);
707 
708 			if (skb == NULL) {
709 				dev->stats.rx_dropped++;
710 				sbus_writew(0, &rd->mblength);
711 				sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
712 				lp->rx_new = RX_NEXT(entry);
713 				return;
714 			}
715 
716 			dev->stats.rx_bytes += len;
717 
718 			skb_reserve (skb, 2);		/* 16 byte align */
719 			skb_put(skb, len);		/* make room */
720 			lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
721 			skb->protocol = eth_type_trans(skb, dev);
722 			netif_rx(skb);
723 			dev->stats.rx_packets++;
724 		}
725 
726 		/* Return the packet to the pool */
727 		sbus_writew(0, &rd->mblength);
728 		sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
729 		entry = RX_NEXT(entry);
730 	}
731 
732 	lp->rx_new = entry;
733 }
734 
735 static void lance_tx_pio(struct net_device *dev)
736 {
737 	struct lance_private *lp = netdev_priv(dev);
738 	struct lance_init_block __iomem *ib = lp->init_block_iomem;
739 	int i, j;
740 
741 	spin_lock(&lp->lock);
742 
743 	j = lp->tx_old;
744 	for (i = j; i != lp->tx_new; i = j) {
745 		struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
746 		u8 bits = sbus_readb(&td->tmd1_bits);
747 
748 		/* If we hit a packet not owned by us, stop */
749 		if (bits & LE_T1_OWN)
750 			break;
751 
752 		if (bits & LE_T1_ERR) {
753 			u16 status = sbus_readw(&td->misc);
754 
755 			dev->stats.tx_errors++;
756 			if (status & LE_T3_RTY)  dev->stats.tx_aborted_errors++;
757 			if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
758 
759 			if (status & LE_T3_CLOS) {
760 				dev->stats.tx_carrier_errors++;
761 				if (lp->auto_select) {
762 					lp->tpe = 1 - lp->tpe;
763 					printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
764 					       dev->name, lp->tpe?"TPE":"AUI");
765 					STOP_LANCE(lp);
766 					lp->init_ring(dev);
767 					load_csrs(lp);
768 					init_restart_lance(lp);
769 					goto out;
770 				}
771 			}
772 
773 			/* Buffer errors and underflows turn off the
774 			 * transmitter, restart the adapter.
775 			 */
776 			if (status & (LE_T3_BUF|LE_T3_UFL)) {
777 				dev->stats.tx_fifo_errors++;
778 
779 				printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
780 				       dev->name);
781 				STOP_LANCE(lp);
782 				lp->init_ring(dev);
783 				load_csrs(lp);
784 				init_restart_lance(lp);
785 				goto out;
786 			}
787 		} else if ((bits & LE_T1_POK) == LE_T1_POK) {
788 			/*
789 			 * So we don't count the packet more than once.
790 			 */
791 			sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
792 
793 			/* One collision before packet was sent. */
794 			if (bits & LE_T1_EONE)
795 				dev->stats.collisions++;
796 
797 			/* More than one collision, be optimistic. */
798 			if (bits & LE_T1_EMORE)
799 				dev->stats.collisions += 2;
800 
801 			dev->stats.tx_packets++;
802 		}
803 
804 		j = TX_NEXT(j);
805 	}
806 	lp->tx_old = j;
807 
808 	if (netif_queue_stopped(dev) &&
809 	    TX_BUFFS_AVAIL > 0)
810 		netif_wake_queue(dev);
811 out:
812 	spin_unlock(&lp->lock);
813 }
814 
815 static irqreturn_t lance_interrupt(int irq, void *dev_id)
816 {
817 	struct net_device *dev = dev_id;
818 	struct lance_private *lp = netdev_priv(dev);
819 	int csr0;
820 
821 	sbus_writew(LE_CSR0, lp->lregs + RAP);
822 	csr0 = sbus_readw(lp->lregs + RDP);
823 
824 	/* Acknowledge all the interrupt sources ASAP */
825 	sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
826 		    lp->lregs + RDP);
827 
828 	if ((csr0 & LE_C0_ERR) != 0) {
829 		/* Clear the error condition */
830 		sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
831 			     LE_C0_CERR | LE_C0_MERR),
832 			    lp->lregs + RDP);
833 	}
834 
835 	if (csr0 & LE_C0_RINT)
836 		lp->rx(dev);
837 
838 	if (csr0 & LE_C0_TINT)
839 		lp->tx(dev);
840 
841 	if (csr0 & LE_C0_BABL)
842 		dev->stats.tx_errors++;
843 
844 	if (csr0 & LE_C0_MISS)
845 		dev->stats.rx_errors++;
846 
847 	if (csr0 & LE_C0_MERR) {
848 		if (lp->dregs) {
849 			u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
850 
851 			printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
852 			       dev->name, csr0, addr & 0xffffff);
853 		} else {
854 			printk(KERN_ERR "%s: Memory error, status %04x\n",
855 			       dev->name, csr0);
856 		}
857 
858 		sbus_writew(LE_C0_STOP, lp->lregs + RDP);
859 
860 		if (lp->dregs) {
861 			u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
862 
863 			dma_csr |= DMA_FIFO_INV;
864 			sbus_writel(dma_csr, lp->dregs + DMA_CSR);
865 		}
866 
867 		lp->init_ring(dev);
868 		load_csrs(lp);
869 		init_restart_lance(lp);
870 		netif_wake_queue(dev);
871 	}
872 
873 	sbus_writew(LE_C0_INEA, lp->lregs + RDP);
874 
875 	return IRQ_HANDLED;
876 }
877 
878 /* Build a fake network packet and send it to ourselves. */
879 static void build_fake_packet(struct lance_private *lp)
880 {
881 	struct net_device *dev = lp->dev;
882 	int i, entry;
883 
884 	entry = lp->tx_new & TX_RING_MOD_MASK;
885 	if (lp->pio_buffer) {
886 		struct lance_init_block __iomem *ib = lp->init_block_iomem;
887 		u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
888 		struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
889 		for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
890 			sbus_writew(0, &packet[i]);
891 		for (i = 0; i < 6; i++) {
892 			sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
893 			sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
894 		}
895 		sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
896 		sbus_writew(0, &ib->btx_ring[entry].misc);
897 		sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
898 	} else {
899 		struct lance_init_block *ib = lp->init_block_mem;
900 		u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
901 		struct ethhdr *eth = (struct ethhdr *) packet;
902 		memset(packet, 0, ETH_ZLEN);
903 		for (i = 0; i < 6; i++) {
904 			eth->h_dest[i] = dev->dev_addr[i];
905 			eth->h_source[i] = dev->dev_addr[i];
906 		}
907 		ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
908 		ib->btx_ring[entry].misc = 0;
909 		ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
910 	}
911 	lp->tx_new = TX_NEXT(entry);
912 }
913 
914 static int lance_open(struct net_device *dev)
915 {
916 	struct lance_private *lp = netdev_priv(dev);
917 	int status = 0;
918 
919 	STOP_LANCE(lp);
920 
921 	if (request_irq(dev->irq, lance_interrupt, IRQF_SHARED,
922 			lancestr, (void *) dev)) {
923 		printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
924 		return -EAGAIN;
925 	}
926 
927 	/* On the 4m, setup the ledma to provide the upper bits for buffers */
928 	if (lp->dregs) {
929 		u32 regval = lp->init_block_dvma & 0xff000000;
930 
931 		sbus_writel(regval, lp->dregs + DMA_TEST);
932 	}
933 
934 	/* Set mode and clear multicast filter only at device open,
935 	 * so that lance_init_ring() called at any error will not
936 	 * forget multicast filters.
937 	 *
938 	 * BTW it is common bug in all lance drivers! --ANK
939 	 */
940 	if (lp->pio_buffer) {
941 		struct lance_init_block __iomem *ib = lp->init_block_iomem;
942 		sbus_writew(0, &ib->mode);
943 		sbus_writel(0, &ib->filter[0]);
944 		sbus_writel(0, &ib->filter[1]);
945 	} else {
946 		struct lance_init_block *ib = lp->init_block_mem;
947 		ib->mode = 0;
948 		ib->filter [0] = 0;
949 		ib->filter [1] = 0;
950 	}
951 
952 	lp->init_ring(dev);
953 	load_csrs(lp);
954 
955 	netif_start_queue(dev);
956 
957 	status = init_restart_lance(lp);
958 	if (!status && lp->auto_select) {
959 		build_fake_packet(lp);
960 		sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
961 	}
962 
963 	return status;
964 }
965 
966 static int lance_close(struct net_device *dev)
967 {
968 	struct lance_private *lp = netdev_priv(dev);
969 
970 	netif_stop_queue(dev);
971 	del_timer_sync(&lp->multicast_timer);
972 
973 	STOP_LANCE(lp);
974 
975 	free_irq(dev->irq, (void *) dev);
976 	return 0;
977 }
978 
979 static int lance_reset(struct net_device *dev)
980 {
981 	struct lance_private *lp = netdev_priv(dev);
982 	int status;
983 
984 	STOP_LANCE(lp);
985 
986 	/* On the 4m, reset the dma too */
987 	if (lp->dregs) {
988 		u32 csr, addr;
989 
990 		printk(KERN_ERR "resetting ledma\n");
991 		csr = sbus_readl(lp->dregs + DMA_CSR);
992 		sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
993 		udelay(200);
994 		sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
995 
996 		addr = lp->init_block_dvma & 0xff000000;
997 		sbus_writel(addr, lp->dregs + DMA_TEST);
998 	}
999 	lp->init_ring(dev);
1000 	load_csrs(lp);
1001 	netif_trans_update(dev); /* prevent tx timeout */
1002 	status = init_restart_lance(lp);
1003 	return status;
1004 }
1005 
1006 static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1007 {
1008 	void __iomem *piobuf = dest;
1009 	u32 *p32;
1010 	u16 *p16;
1011 	u8 *p8;
1012 
1013 	switch ((unsigned long)src & 0x3) {
1014 	case 0:
1015 		p32 = (u32 *) src;
1016 		while (len >= 4) {
1017 			sbus_writel(*p32, piobuf);
1018 			p32++;
1019 			piobuf += 4;
1020 			len -= 4;
1021 		}
1022 		src = (char *) p32;
1023 		break;
1024 	case 1:
1025 	case 3:
1026 		p8 = (u8 *) src;
1027 		while (len >= 4) {
1028 			u32 val;
1029 
1030 			val  = p8[0] << 24;
1031 			val |= p8[1] << 16;
1032 			val |= p8[2] << 8;
1033 			val |= p8[3];
1034 			sbus_writel(val, piobuf);
1035 			p8 += 4;
1036 			piobuf += 4;
1037 			len -= 4;
1038 		}
1039 		src = (char *) p8;
1040 		break;
1041 	case 2:
1042 		p16 = (u16 *) src;
1043 		while (len >= 4) {
1044 			u32 val = p16[0]<<16 | p16[1];
1045 			sbus_writel(val, piobuf);
1046 			p16 += 2;
1047 			piobuf += 4;
1048 			len -= 4;
1049 		}
1050 		src = (char *) p16;
1051 		break;
1052 	}
1053 	if (len >= 2) {
1054 		u16 val = src[0] << 8 | src[1];
1055 		sbus_writew(val, piobuf);
1056 		src += 2;
1057 		piobuf += 2;
1058 		len -= 2;
1059 	}
1060 	if (len >= 1)
1061 		sbus_writeb(src[0], piobuf);
1062 }
1063 
1064 static void lance_piozero(void __iomem *dest, int len)
1065 {
1066 	void __iomem *piobuf = dest;
1067 
1068 	if ((unsigned long)piobuf & 1) {
1069 		sbus_writeb(0, piobuf);
1070 		piobuf += 1;
1071 		len -= 1;
1072 		if (len == 0)
1073 			return;
1074 	}
1075 	if (len == 1) {
1076 		sbus_writeb(0, piobuf);
1077 		return;
1078 	}
1079 	if ((unsigned long)piobuf & 2) {
1080 		sbus_writew(0, piobuf);
1081 		piobuf += 2;
1082 		len -= 2;
1083 		if (len == 0)
1084 			return;
1085 	}
1086 	while (len >= 4) {
1087 		sbus_writel(0, piobuf);
1088 		piobuf += 4;
1089 		len -= 4;
1090 	}
1091 	if (len >= 2) {
1092 		sbus_writew(0, piobuf);
1093 		piobuf += 2;
1094 		len -= 2;
1095 	}
1096 	if (len >= 1)
1097 		sbus_writeb(0, piobuf);
1098 }
1099 
1100 static void lance_tx_timeout(struct net_device *dev, unsigned int txqueue)
1101 {
1102 	struct lance_private *lp = netdev_priv(dev);
1103 
1104 	printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1105 	       dev->name, sbus_readw(lp->lregs + RDP));
1106 	lance_reset(dev);
1107 	netif_wake_queue(dev);
1108 }
1109 
1110 static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1111 {
1112 	struct lance_private *lp = netdev_priv(dev);
1113 	int entry, skblen, len;
1114 
1115 	skblen = skb->len;
1116 
1117 	len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1118 
1119 	spin_lock_irq(&lp->lock);
1120 
1121 	dev->stats.tx_bytes += len;
1122 
1123 	entry = lp->tx_new & TX_RING_MOD_MASK;
1124 	if (lp->pio_buffer) {
1125 		struct lance_init_block __iomem *ib = lp->init_block_iomem;
1126 		sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1127 		sbus_writew(0, &ib->btx_ring[entry].misc);
1128 		lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1129 		if (len != skblen)
1130 			lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1131 		sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1132 	} else {
1133 		struct lance_init_block *ib = lp->init_block_mem;
1134 		ib->btx_ring [entry].length = (-len) | 0xf000;
1135 		ib->btx_ring [entry].misc = 0;
1136 		skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1137 		if (len != skblen)
1138 			memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1139 		ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1140 	}
1141 
1142 	lp->tx_new = TX_NEXT(entry);
1143 
1144 	if (TX_BUFFS_AVAIL <= 0)
1145 		netif_stop_queue(dev);
1146 
1147 	/* Kick the lance: transmit now */
1148 	sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1149 
1150 	/* Read back CSR to invalidate the E-Cache.
1151 	 * This is needed, because DMA_DSBL_WR_INV is set.
1152 	 */
1153 	if (lp->dregs)
1154 		sbus_readw(lp->lregs + RDP);
1155 
1156 	spin_unlock_irq(&lp->lock);
1157 
1158 	dev_kfree_skb(skb);
1159 
1160 	return NETDEV_TX_OK;
1161 }
1162 
1163 /* taken from the depca driver */
1164 static void lance_load_multicast(struct net_device *dev)
1165 {
1166 	struct lance_private *lp = netdev_priv(dev);
1167 	struct netdev_hw_addr *ha;
1168 	u32 crc;
1169 	u32 val;
1170 
1171 	/* set all multicast bits */
1172 	if (dev->flags & IFF_ALLMULTI)
1173 		val = ~0;
1174 	else
1175 		val = 0;
1176 
1177 	if (lp->pio_buffer) {
1178 		struct lance_init_block __iomem *ib = lp->init_block_iomem;
1179 		sbus_writel(val, &ib->filter[0]);
1180 		sbus_writel(val, &ib->filter[1]);
1181 	} else {
1182 		struct lance_init_block *ib = lp->init_block_mem;
1183 		ib->filter [0] = val;
1184 		ib->filter [1] = val;
1185 	}
1186 
1187 	if (dev->flags & IFF_ALLMULTI)
1188 		return;
1189 
1190 	/* Add addresses */
1191 	netdev_for_each_mc_addr(ha, dev) {
1192 		crc = ether_crc_le(6, ha->addr);
1193 		crc = crc >> 26;
1194 		if (lp->pio_buffer) {
1195 			struct lance_init_block __iomem *ib = lp->init_block_iomem;
1196 			u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1197 			u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1198 			tmp |= 1 << (crc & 0xf);
1199 			sbus_writew(tmp, &mcast_table[crc>>4]);
1200 		} else {
1201 			struct lance_init_block *ib = lp->init_block_mem;
1202 			u16 *mcast_table = (u16 *) &ib->filter;
1203 			mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1204 		}
1205 	}
1206 }
1207 
1208 static void lance_set_multicast(struct net_device *dev)
1209 {
1210 	struct lance_private *lp = netdev_priv(dev);
1211 	struct lance_init_block *ib_mem = lp->init_block_mem;
1212 	struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1213 	u16 mode;
1214 
1215 	if (!netif_running(dev))
1216 		return;
1217 
1218 	if (lp->tx_old != lp->tx_new) {
1219 		mod_timer(&lp->multicast_timer, jiffies + 4);
1220 		netif_wake_queue(dev);
1221 		return;
1222 	}
1223 
1224 	netif_stop_queue(dev);
1225 
1226 	STOP_LANCE(lp);
1227 	lp->init_ring(dev);
1228 
1229 	if (lp->pio_buffer)
1230 		mode = sbus_readw(&ib_iomem->mode);
1231 	else
1232 		mode = ib_mem->mode;
1233 	if (dev->flags & IFF_PROMISC) {
1234 		mode |= LE_MO_PROM;
1235 		if (lp->pio_buffer)
1236 			sbus_writew(mode, &ib_iomem->mode);
1237 		else
1238 			ib_mem->mode = mode;
1239 	} else {
1240 		mode &= ~LE_MO_PROM;
1241 		if (lp->pio_buffer)
1242 			sbus_writew(mode, &ib_iomem->mode);
1243 		else
1244 			ib_mem->mode = mode;
1245 		lance_load_multicast(dev);
1246 	}
1247 	load_csrs(lp);
1248 	init_restart_lance(lp);
1249 	netif_wake_queue(dev);
1250 }
1251 
1252 static void lance_set_multicast_retry(struct timer_list *t)
1253 {
1254 	struct lance_private *lp = from_timer(lp, t, multicast_timer);
1255 	struct net_device *dev = lp->dev;
1256 
1257 	lance_set_multicast(dev);
1258 }
1259 
1260 static void lance_free_hwresources(struct lance_private *lp)
1261 {
1262 	if (lp->lregs)
1263 		of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
1264 	if (lp->dregs) {
1265 		struct platform_device *ledma = lp->ledma;
1266 
1267 		of_iounmap(&ledma->resource[0], lp->dregs,
1268 			   resource_size(&ledma->resource[0]));
1269 	}
1270 	if (lp->init_block_iomem) {
1271 		of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
1272 			   sizeof(struct lance_init_block));
1273 	} else if (lp->init_block_mem) {
1274 		dma_free_coherent(&lp->op->dev,
1275 				  sizeof(struct lance_init_block),
1276 				  lp->init_block_mem,
1277 				  lp->init_block_dvma);
1278 	}
1279 }
1280 
1281 /* Ethtool support... */
1282 static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1283 {
1284 	strlcpy(info->driver, "sunlance", sizeof(info->driver));
1285 	strlcpy(info->version, "2.02", sizeof(info->version));
1286 }
1287 
1288 static const struct ethtool_ops sparc_lance_ethtool_ops = {
1289 	.get_drvinfo		= sparc_lance_get_drvinfo,
1290 	.get_link		= ethtool_op_get_link,
1291 };
1292 
1293 static const struct net_device_ops sparc_lance_ops = {
1294 	.ndo_open		= lance_open,
1295 	.ndo_stop		= lance_close,
1296 	.ndo_start_xmit		= lance_start_xmit,
1297 	.ndo_set_rx_mode	= lance_set_multicast,
1298 	.ndo_tx_timeout		= lance_tx_timeout,
1299 	.ndo_set_mac_address	= eth_mac_addr,
1300 	.ndo_validate_addr	= eth_validate_addr,
1301 };
1302 
1303 static int sparc_lance_probe_one(struct platform_device *op,
1304 				 struct platform_device *ledma,
1305 				 struct platform_device *lebuffer)
1306 {
1307 	struct device_node *dp = op->dev.of_node;
1308 	static unsigned version_printed;
1309 	struct lance_private *lp;
1310 	struct net_device *dev;
1311 	int    i;
1312 
1313 	dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1314 	if (!dev)
1315 		return -ENOMEM;
1316 
1317 	lp = netdev_priv(dev);
1318 
1319 	if (sparc_lance_debug && version_printed++ == 0)
1320 		printk (KERN_INFO "%s", version);
1321 
1322 	spin_lock_init(&lp->lock);
1323 
1324 	/* Copy the IDPROM ethernet address to the device structure, later we
1325 	 * will copy the address in the device structure to the lance
1326 	 * initialization block.
1327 	 */
1328 	for (i = 0; i < 6; i++)
1329 		dev->dev_addr[i] = idprom->id_ethaddr[i];
1330 
1331 	/* Get the IO region */
1332 	lp->lregs = of_ioremap(&op->resource[0], 0,
1333 			       LANCE_REG_SIZE, lancestr);
1334 	if (!lp->lregs) {
1335 		printk(KERN_ERR "SunLance: Cannot map registers.\n");
1336 		goto fail;
1337 	}
1338 
1339 	lp->ledma = ledma;
1340 	if (lp->ledma) {
1341 		lp->dregs = of_ioremap(&ledma->resource[0], 0,
1342 				       resource_size(&ledma->resource[0]),
1343 				       "ledma");
1344 		if (!lp->dregs) {
1345 			printk(KERN_ERR "SunLance: Cannot map "
1346 			       "ledma registers.\n");
1347 			goto fail;
1348 		}
1349 	}
1350 
1351 	lp->op = op;
1352 	lp->lebuffer = lebuffer;
1353 	if (lebuffer) {
1354 		/* sanity check */
1355 		if (lebuffer->resource[0].start & 7) {
1356 			printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1357 			goto fail;
1358 		}
1359 		lp->init_block_iomem =
1360 			of_ioremap(&lebuffer->resource[0], 0,
1361 				   sizeof(struct lance_init_block), "lebuffer");
1362 		if (!lp->init_block_iomem) {
1363 			printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1364 			goto fail;
1365 		}
1366 		lp->init_block_dvma = 0;
1367 		lp->pio_buffer = 1;
1368 		lp->init_ring = lance_init_ring_pio;
1369 		lp->rx = lance_rx_pio;
1370 		lp->tx = lance_tx_pio;
1371 	} else {
1372 		lp->init_block_mem =
1373 			dma_alloc_coherent(&op->dev,
1374 					   sizeof(struct lance_init_block),
1375 					   &lp->init_block_dvma, GFP_ATOMIC);
1376 		if (!lp->init_block_mem)
1377 			goto fail;
1378 
1379 		lp->pio_buffer = 0;
1380 		lp->init_ring = lance_init_ring_dvma;
1381 		lp->rx = lance_rx_dvma;
1382 		lp->tx = lance_tx_dvma;
1383 	}
1384 	lp->busmaster_regval = of_getintprop_default(dp,  "busmaster-regval",
1385 						     (LE_C3_BSWP |
1386 						      LE_C3_ACON |
1387 						      LE_C3_BCON));
1388 
1389 	lp->name = lancestr;
1390 
1391 	lp->burst_sizes = 0;
1392 	if (lp->ledma) {
1393 		struct device_node *ledma_dp = ledma->dev.of_node;
1394 		struct device_node *sbus_dp;
1395 		unsigned int sbmask;
1396 		const char *prop;
1397 		u32 csr;
1398 
1399 		/* Find burst-size property for ledma */
1400 		lp->burst_sizes = of_getintprop_default(ledma_dp,
1401 							"burst-sizes", 0);
1402 
1403 		/* ledma may be capable of fast bursts, but sbus may not. */
1404 		sbus_dp = ledma_dp->parent;
1405 		sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
1406 					       DMA_BURSTBITS);
1407 		lp->burst_sizes &= sbmask;
1408 
1409 		/* Get the cable-selection property */
1410 		prop = of_get_property(ledma_dp, "cable-selection", NULL);
1411 		if (!prop || prop[0] == '\0') {
1412 			struct device_node *nd;
1413 
1414 			printk(KERN_INFO "SunLance: using "
1415 			       "auto-carrier-detection.\n");
1416 
1417 			nd = of_find_node_by_path("/options");
1418 			if (!nd)
1419 				goto no_link_test;
1420 
1421 			prop = of_get_property(nd, "tpe-link-test?", NULL);
1422 			if (!prop)
1423 				goto node_put;
1424 
1425 			if (strcmp(prop, "true")) {
1426 				printk(KERN_NOTICE "SunLance: warning: overriding option "
1427 				       "'tpe-link-test?'\n");
1428 				printk(KERN_NOTICE "SunLance: warning: mail any problems "
1429 				       "to ecd@skynet.be\n");
1430 				auxio_set_lte(AUXIO_LTE_ON);
1431 			}
1432 node_put:
1433 			of_node_put(nd);
1434 no_link_test:
1435 			lp->auto_select = 1;
1436 			lp->tpe = 0;
1437 		} else if (!strcmp(prop, "aui")) {
1438 			lp->auto_select = 0;
1439 			lp->tpe = 0;
1440 		} else {
1441 			lp->auto_select = 0;
1442 			lp->tpe = 1;
1443 		}
1444 
1445 		/* Reset ledma */
1446 		csr = sbus_readl(lp->dregs + DMA_CSR);
1447 		sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1448 		udelay(200);
1449 		sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1450 	} else
1451 		lp->dregs = NULL;
1452 
1453 	lp->dev = dev;
1454 	SET_NETDEV_DEV(dev, &op->dev);
1455 	dev->watchdog_timeo = 5*HZ;
1456 	dev->ethtool_ops = &sparc_lance_ethtool_ops;
1457 	dev->netdev_ops = &sparc_lance_ops;
1458 
1459 	dev->irq = op->archdata.irqs[0];
1460 
1461 	/* We cannot sleep if the chip is busy during a
1462 	 * multicast list update event, because such events
1463 	 * can occur from interrupts (ex. IPv6).  So we
1464 	 * use a timer to try again later when necessary. -DaveM
1465 	 */
1466 	timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
1467 
1468 	if (register_netdev(dev)) {
1469 		printk(KERN_ERR "SunLance: Cannot register device.\n");
1470 		goto fail;
1471 	}
1472 
1473 	platform_set_drvdata(op, lp);
1474 
1475 	printk(KERN_INFO "%s: LANCE %pM\n",
1476 	       dev->name, dev->dev_addr);
1477 
1478 	return 0;
1479 
1480 fail:
1481 	lance_free_hwresources(lp);
1482 	free_netdev(dev);
1483 	return -ENODEV;
1484 }
1485 
1486 static int sunlance_sbus_probe(struct platform_device *op)
1487 {
1488 	struct platform_device *parent = to_platform_device(op->dev.parent);
1489 	struct device_node *parent_dp = parent->dev.of_node;
1490 	int err;
1491 
1492 	if (of_node_name_eq(parent_dp, "ledma")) {
1493 		err = sparc_lance_probe_one(op, parent, NULL);
1494 	} else if (of_node_name_eq(parent_dp, "lebuffer")) {
1495 		err = sparc_lance_probe_one(op, NULL, parent);
1496 	} else
1497 		err = sparc_lance_probe_one(op, NULL, NULL);
1498 
1499 	return err;
1500 }
1501 
1502 static int sunlance_sbus_remove(struct platform_device *op)
1503 {
1504 	struct lance_private *lp = platform_get_drvdata(op);
1505 	struct net_device *net_dev = lp->dev;
1506 
1507 	unregister_netdev(net_dev);
1508 
1509 	lance_free_hwresources(lp);
1510 
1511 	free_netdev(net_dev);
1512 
1513 	return 0;
1514 }
1515 
1516 static const struct of_device_id sunlance_sbus_match[] = {
1517 	{
1518 		.name = "le",
1519 	},
1520 	{},
1521 };
1522 
1523 MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1524 
1525 static struct platform_driver sunlance_sbus_driver = {
1526 	.driver = {
1527 		.name = "sunlance",
1528 		.of_match_table = sunlance_sbus_match,
1529 	},
1530 	.probe		= sunlance_sbus_probe,
1531 	.remove		= sunlance_sbus_remove,
1532 };
1533 
1534 module_platform_driver(sunlance_sbus_driver);
1535