Kernel

Kernel Git Source Tree

Root/drivers/net/sunlance.c

1	/* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
2	* lance.c: Linux/Sparc/Lance driver
3	*
4	* Written 1995, 1996 by Miguel de Icaza
5	* Sources:
6	* The Linux depca driver
7	* The Linux lance driver.
8	* The Linux skeleton driver.
9	* The NetBSD Sparc/Lance driver.
10	* Theo de Raadt (deraadt@openbsd.org)
11	* NCR92C990 Lan Controller manual
12	*
13	* 1.4:
14	* Added support to run with a ledma on the Sun4m
15	*
16	* 1.5:
17	* Added multiple card detection.
18	*
19	* 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
20	* (ecd@skynet.be)
21	*
22	* 5/15/96: auto carrier detection on sun4m by Eddie C. Dost
23	* (ecd@skynet.be)
24	*
25	* 5/17/96: lebuffer on scsi/ether cards now work David S. Miller
26	* (davem@caip.rutgers.edu)
27	*
28	* 5/29/96: override option 'tpe-link-test?', if it is 'false', as
29	* this disables auto carrier detection on sun4m. Eddie C. Dost
30	* (ecd@skynet.be)
31	*
32	* 1.7:
33	* 6/26/96: Bug fix for multiple ledmas, miguel.
34	*
35	* 1.8:
36	* Stole multicast code from depca.c, fixed lance_tx.
37	*
38	* 1.9:
39	* 8/21/96: Fixed the multicast code (Pedro Roque)
40	*
41	* 8/28/96: Send fake packet in lance_open() if auto_select is true,
42	* so we can detect the carrier loss condition in time.
43	* Eddie C. Dost (ecd@skynet.be)
44	*
45	* 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
46	* MNA trap during chksum_partial_copy(). (ecd@skynet.be)
47	*
48	* 11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
49	*
50	* 12/22/96: Don't loop forever in lance_rx() on incomplete packets.
51	* This was the sun4c killer. Shit, stupid bug.
52	* (ecd@skynet.be)
53	*
54	* 1.10:
55	* 1/26/97: Modularize driver. (ecd@skynet.be)
56	*
57	* 1.11:
58	* 12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
59	*
60	* 1.12:
61	* 11/3/99: Fixed SMP race in lance_start_xmit found by davem.
62	* Anton Blanchard (anton@progsoc.uts.edu.au)
63	* 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
64	* David S. Miller (davem@redhat.com)
65	* 2.01:
66	* 11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
67	*
68	*/
69
70	#undef DEBUG_DRIVER
71
72	static char lancestr[] = "LANCE";
73
74	#include <linux/module.h>
75	#include <linux/kernel.h>
76	#include <linux/types.h>
77	#include <linux/fcntl.h>
78	#include <linux/interrupt.h>
79	#include <linux/ioport.h>
80	#include <linux/in.h>
81	#include <linux/slab.h>
82	#include <linux/string.h>
83	#include <linux/delay.h>
84	#include <linux/init.h>
85	#include <linux/crc32.h>
86	#include <linux/errno.h>
87	#include <linux/socket.h> /* Used for the temporal inet entries and routing */
88	#include <linux/route.h>
89	#include <linux/netdevice.h>
90	#include <linux/etherdevice.h>
91	#include <linux/skbuff.h>
92	#include <linux/ethtool.h>
93	#include <linux/bitops.h>
94	#include <linux/dma-mapping.h>
95	#include <linux/of.h>
96	#include <linux/of_device.h>
97
98	#include <asm/system.h>
99	#include <asm/io.h>
100	#include <asm/dma.h>
101	#include <asm/pgtable.h>
102	#include <asm/byteorder.h> /* Used by the checksum routines */
103	#include <asm/idprom.h>
104	#include <asm/prom.h>
105	#include <asm/auxio.h> /* For tpe-link-test? setting */
106	#include <asm/irq.h>
107
108	#define DRV_NAME "sunlance"
109	#define DRV_VERSION "2.02"
110	#define DRV_RELDATE "8/24/03"
111	#define DRV_AUTHOR "Miguel de Icaza (miguel@nuclecu.unam.mx)"
112
113	static char version[] =
114	DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
115
116	MODULE_VERSION(DRV_VERSION);
117	MODULE_AUTHOR(DRV_AUTHOR);
118	MODULE_DESCRIPTION("Sun Lance ethernet driver");
119	MODULE_LICENSE("GPL");
120
121	/* Define: 2^4 Tx buffers and 2^4 Rx buffers */
122	#ifndef LANCE_LOG_TX_BUFFERS
123	#define LANCE_LOG_TX_BUFFERS 4
124	#define LANCE_LOG_RX_BUFFERS 4
125	#endif
126
127	#define LE_CSR0 0
128	#define LE_CSR1 1
129	#define LE_CSR2 2
130	#define LE_CSR3 3
131
132	#define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
133
134	#define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
135	#define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
136	#define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
137	#define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
138	#define LE_C0_MERR 0x0800 /* ME: Memory error */
139	#define LE_C0_RINT 0x0400 /* Received interrupt */
140	#define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
141	#define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
142	#define LE_C0_INTR 0x0080 /* Interrupt or error */
143	#define LE_C0_INEA 0x0040 /* Interrupt enable */
144	#define LE_C0_RXON 0x0020 /* Receiver on */
145	#define LE_C0_TXON 0x0010 /* Transmitter on */
146	#define LE_C0_TDMD 0x0008 /* Transmitter demand */
147	#define LE_C0_STOP 0x0004 /* Stop the card */
148	#define LE_C0_STRT 0x0002 /* Start the card */
149	#define LE_C0_INIT 0x0001 /* Init the card */
150
151	#define LE_C3_BSWP 0x4 /* SWAP */
152	#define LE_C3_ACON 0x2 /* ALE Control */
153	#define LE_C3_BCON 0x1 /* Byte control */
154
155	/* Receive message descriptor 1 */
156	#define LE_R1_OWN 0x80 /* Who owns the entry */
157	#define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */
158	#define LE_R1_FRA 0x20 /* FRA: Frame error */
159	#define LE_R1_OFL 0x10 /* OFL: Frame overflow */
160	#define LE_R1_CRC 0x08 /* CRC error */
161	#define LE_R1_BUF 0x04 /* BUF: Buffer error */
162	#define LE_R1_SOP 0x02 /* Start of packet */
163	#define LE_R1_EOP 0x01 /* End of packet */
164	#define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */
165
166	#define LE_T1_OWN 0x80 /* Lance owns the packet */
167	#define LE_T1_ERR 0x40 /* Error summary */
168	#define LE_T1_EMORE 0x10 /* Error: more than one retry needed */
169	#define LE_T1_EONE 0x08 /* Error: one retry needed */
170	#define LE_T1_EDEF 0x04 /* Error: deferred */
171	#define LE_T1_SOP 0x02 /* Start of packet */
172	#define LE_T1_EOP 0x01 /* End of packet */
173	#define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */
174
175	#define LE_T3_BUF 0x8000 /* Buffer error */
176	#define LE_T3_UFL 0x4000 /* Error underflow */
177	#define LE_T3_LCOL 0x1000 /* Error late collision */
178	#define LE_T3_CLOS 0x0800 /* Error carrier loss */
179	#define LE_T3_RTY 0x0400 /* Error retry */
180	#define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
181
182	#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
183	#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
184	#define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
185	#define TX_NEXT(__x) (((__x)+1) & TX_RING_MOD_MASK)
186
187	#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
188	#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
189	#define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
190	#define RX_NEXT(__x) (((__x)+1) & RX_RING_MOD_MASK)
191
192	#define PKT_BUF_SZ 1544
193	#define RX_BUFF_SIZE PKT_BUF_SZ
194	#define TX_BUFF_SIZE PKT_BUF_SZ
195
196	struct lance_rx_desc {
197	u16 rmd0; /* low address of packet */
198	u8 rmd1_bits; /* descriptor bits */
199	u8 rmd1_hadr; /* high address of packet */
200	s16 length; /* This length is 2s complement (negative)!
201	* Buffer length
202	*/
203	u16 mblength; /* This is the actual number of bytes received */
204	};
205
206	struct lance_tx_desc {
207	u16 tmd0; /* low address of packet */
208	u8 tmd1_bits; /* descriptor bits */
209	u8 tmd1_hadr; /* high address of packet */
210	s16 length; /* Length is 2s complement (negative)! */
211	u16 misc;
212	};
213
214	/* The LANCE initialization block, described in databook. */
215	/* On the Sparc, this block should be on a DMA region */
216	struct lance_init_block {
217	u16 mode; /* Pre-set mode (reg. 15) */
218	u8 phys_addr[6]; /* Physical ethernet address */
219	u32 filter[2]; /* Multicast filter. */
220
221	/* Receive and transmit ring base, along with extra bits. */
222	u16 rx_ptr; /* receive descriptor addr */
223	u16 rx_len; /* receive len and high addr */
224	u16 tx_ptr; /* transmit descriptor addr */
225	u16 tx_len; /* transmit len and high addr */
226
227	/* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
228	struct lance_rx_desc brx_ring[RX_RING_SIZE];
229	struct lance_tx_desc btx_ring[TX_RING_SIZE];
230
231	u8 tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
232	u8 pad[2]; /* align rx_buf for copy_and_sum(). */
233	u8 rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
234	};
235
236	#define libdesc_offset(rt, elem) \
237	((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
238
239	#define libbuff_offset(rt, elem) \
240	((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
241
242	struct lance_private {
243	void __iomem lregs; / Lance RAP/RDP regs. */
244	void __iomem dregs; / DMA controller regs. */
245	struct lance_init_block __iomem *init_block_iomem;
246	struct lance_init_block *init_block_mem;
247
248	spinlock_t lock;
249
250	int rx_new, tx_new;
251	int rx_old, tx_old;
252
253	struct of_device ledma; / If set this points to ledma */
254	char tpe; /* cable-selection is TPE */
255	char auto_select; /* cable-selection by carrier */
256	char burst_sizes; /* ledma SBus burst sizes */
257	char pio_buffer; /* init block in PIO space? */
258
259	unsigned short busmaster_regval;
260
261	void (init_ring)(struct net_device );
262	void (rx)(struct net_device );
263	void (tx)(struct net_device );
264
265	char *name;
266	dma_addr_t init_block_dvma;
267	struct net_device dev; / Backpointer */
268	struct of_device *op;
269	struct of_device *lebuffer;
270	struct timer_list multicast_timer;
271	};
272
273	#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
274	lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
275	lp->tx_old - lp->tx_new-1)
276
277	/* Lance registers. */
278	#define RDP 0x00UL /* register data port */
279	#define RAP 0x02UL /* register address port */
280	#define LANCE_REG_SIZE 0x04UL
281
282	#define STOP_LANCE(__lp) \
283	do { void __iomem *__base = (__lp)->lregs; \
284	sbus_writew(LE_CSR0, __base + RAP); \
285	sbus_writew(LE_C0_STOP, __base + RDP); \
286	} while (0)
287
288	int sparc_lance_debug = 2;
289
290	/* The Lance uses 24 bit addresses */
291	/* On the Sun4c the DVMA will provide the remaining bytes for us */
292	/* On the Sun4m we have to instruct the ledma to provide them */
293	/* Even worse, on scsi/ether SBUS cards, the init block and the
294	* transmit/receive buffers are addresses as offsets from absolute
295	* zero on the lebuffer PIO area. -DaveM
296	*/
297
298	#define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
299
300	/* Load the CSR registers */
301	static void load_csrs(struct lance_private *lp)
302	{
303	u32 leptr;
304
305	if (lp->pio_buffer)
306	leptr = 0;
307	else
308	leptr = LANCE_ADDR(lp->init_block_dvma);
309
310	sbus_writew(LE_CSR1, lp->lregs + RAP);
311	sbus_writew(leptr & 0xffff, lp->lregs + RDP);
312	sbus_writew(LE_CSR2, lp->lregs + RAP);
313	sbus_writew(leptr >> 16, lp->lregs + RDP);
314	sbus_writew(LE_CSR3, lp->lregs + RAP);
315	sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
316
317	/* Point back to csr0 */
318	sbus_writew(LE_CSR0, lp->lregs + RAP);
319	}
320
321	/* Setup the Lance Rx and Tx rings */
322	static void lance_init_ring_dvma(struct net_device *dev)
323	{
324	struct lance_private *lp = netdev_priv(dev);
325	struct lance_init_block *ib = lp->init_block_mem;
326	dma_addr_t aib = lp->init_block_dvma;
327	__u32 leptr;
328	int i;
329
330	/* Lock out other processes while setting up hardware */
331	netif_stop_queue(dev);
332	lp->rx_new = lp->tx_new = 0;
333	lp->rx_old = lp->tx_old = 0;
334
335	/* Copy the ethernet address to the lance init block
336	* Note that on the sparc you need to swap the ethernet address.
337	*/
338	ib->phys_addr [0] = dev->dev_addr [1];
339	ib->phys_addr [1] = dev->dev_addr [0];
340	ib->phys_addr [2] = dev->dev_addr [3];
341	ib->phys_addr [3] = dev->dev_addr [2];
342	ib->phys_addr [4] = dev->dev_addr [5];
343	ib->phys_addr [5] = dev->dev_addr [4];
344
345	/* Setup the Tx ring entries */
346	for (i = 0; i < TX_RING_SIZE; i++) {
347	leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
348	ib->btx_ring [i].tmd0 = leptr;
349	ib->btx_ring [i].tmd1_hadr = leptr >> 16;
350	ib->btx_ring [i].tmd1_bits = 0;
351	ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */
352	ib->btx_ring [i].misc = 0;
353	}
354
355	/* Setup the Rx ring entries */
356	for (i = 0; i < RX_RING_SIZE; i++) {
357	leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
358
359	ib->brx_ring [i].rmd0 = leptr;
360	ib->brx_ring [i].rmd1_hadr = leptr >> 16;
361	ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
362	ib->brx_ring [i].length = -RX_BUFF_SIZE \| 0xf000;
363	ib->brx_ring [i].mblength = 0;
364	}
365
366	/* Setup the initialization block */
367
368	/* Setup rx descriptor pointer */
369	leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
370	ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) \| (leptr >> 16);
371	ib->rx_ptr = leptr;
372
373	/* Setup tx descriptor pointer */
374	leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
375	ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) \| (leptr >> 16);
376	ib->tx_ptr = leptr;
377	}
378
379	static void lance_init_ring_pio(struct net_device *dev)
380	{
381	struct lance_private *lp = netdev_priv(dev);
382	struct lance_init_block __iomem *ib = lp->init_block_iomem;
383	u32 leptr;
384	int i;
385
386	/* Lock out other processes while setting up hardware */
387	netif_stop_queue(dev);
388	lp->rx_new = lp->tx_new = 0;
389	lp->rx_old = lp->tx_old = 0;
390
391	/* Copy the ethernet address to the lance init block
392	* Note that on the sparc you need to swap the ethernet address.
393	*/
394	sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
395	sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
396	sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
397	sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
398	sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
399	sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
400
401	/* Setup the Tx ring entries */
402	for (i = 0; i < TX_RING_SIZE; i++) {
403	leptr = libbuff_offset(tx_buf, i);
404	sbus_writew(leptr, &ib->btx_ring [i].tmd0);
405	sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
406	sbus_writeb(0, &ib->btx_ring [i].tmd1_bits);
407
408	/* The ones required by tmd2 */
409	sbus_writew(0xf000, &ib->btx_ring [i].length);
410	sbus_writew(0, &ib->btx_ring [i].misc);
411	}
412
413	/* Setup the Rx ring entries */
414	for (i = 0; i < RX_RING_SIZE; i++) {
415	leptr = libbuff_offset(rx_buf, i);
416
417	sbus_writew(leptr, &ib->brx_ring [i].rmd0);
418	sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
419	sbus_writeb(LE_R1_OWN, &ib->brx_ring [i].rmd1_bits);
420	sbus_writew(-RX_BUFF_SIZE\|0xf000,
421	&ib->brx_ring [i].length);
422	sbus_writew(0, &ib->brx_ring [i].mblength);
423	}
424
425	/* Setup the initialization block */
426
427	/* Setup rx descriptor pointer */
428	leptr = libdesc_offset(brx_ring, 0);
429	sbus_writew((LANCE_LOG_RX_BUFFERS << 13) \| (leptr >> 16),
430	&ib->rx_len);
431	sbus_writew(leptr, &ib->rx_ptr);
432
433	/* Setup tx descriptor pointer */
434	leptr = libdesc_offset(btx_ring, 0);
435	sbus_writew((LANCE_LOG_TX_BUFFERS << 13) \| (leptr >> 16),
436	&ib->tx_len);
437	sbus_writew(leptr, &ib->tx_ptr);
438	}
439
440	static void init_restart_ledma(struct lance_private *lp)
441	{
442	u32 csr = sbus_readl(lp->dregs + DMA_CSR);
443
444	if (!(csr & DMA_HNDL_ERROR)) {
445	/* E-Cache draining */
446	while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
447	barrier();
448	}
449
450	csr = sbus_readl(lp->dregs + DMA_CSR);
451	csr &= ~DMA_E_BURSTS;
452	if (lp->burst_sizes & DMA_BURST32)
453	csr \|= DMA_E_BURST32;
454	else
455	csr \|= DMA_E_BURST16;
456
457	csr \|= (DMA_DSBL_RD_DRN \| DMA_DSBL_WR_INV \| DMA_FIFO_INV);
458
459	if (lp->tpe)
460	csr \|= DMA_EN_ENETAUI;
461	else
462	csr &= ~DMA_EN_ENETAUI;
463	udelay(20);
464	sbus_writel(csr, lp->dregs + DMA_CSR);
465	udelay(200);
466	}
467
468	static int init_restart_lance(struct lance_private *lp)
469	{
470	u16 regval = 0;
471	int i;
472
473	if (lp->dregs)
474	init_restart_ledma(lp);
475
476	sbus_writew(LE_CSR0, lp->lregs + RAP);
477	sbus_writew(LE_C0_INIT, lp->lregs + RDP);
478
479	/* Wait for the lance to complete initialization */
480	for (i = 0; i < 100; i++) {
481	regval = sbus_readw(lp->lregs + RDP);
482
483	if (regval & (LE_C0_ERR \| LE_C0_IDON))
484	break;
485	barrier();
486	}
487	if (i == 100 \|\| (regval & LE_C0_ERR)) {
488	printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
489	i, regval);
490	if (lp->dregs)
491	printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
492	return -1;
493	}
494
495	/* Clear IDON by writing a "1", enable interrupts and start lance */
496	sbus_writew(LE_C0_IDON, lp->lregs + RDP);
497	sbus_writew(LE_C0_INEA \| LE_C0_STRT, lp->lregs + RDP);
498
499	if (lp->dregs) {
500	u32 csr = sbus_readl(lp->dregs + DMA_CSR);
501
502	csr \|= DMA_INT_ENAB;
503	sbus_writel(csr, lp->dregs + DMA_CSR);
504	}
505
506	return 0;
507	}
508
509	static void lance_rx_dvma(struct net_device *dev)
510	{
511	struct lance_private *lp = netdev_priv(dev);
512	struct lance_init_block *ib = lp->init_block_mem;
513	struct lance_rx_desc *rd;
514	u8 bits;
515	int len, entry = lp->rx_new;
516	struct sk_buff *skb;
517
518	for (rd = &ib->brx_ring [entry];
519	!((bits = rd->rmd1_bits) & LE_R1_OWN);
520	rd = &ib->brx_ring [entry]) {
521
522	/* We got an incomplete frame? */
523	if ((bits & LE_R1_POK) != LE_R1_POK) {
524	dev->stats.rx_over_errors++;
525	dev->stats.rx_errors++;
526	} else if (bits & LE_R1_ERR) {
527	/* Count only the end frame as a rx error,
528	* not the beginning
529	*/
530	if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
531	if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
532	if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
533	if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
534	if (bits & LE_R1_EOP) dev->stats.rx_errors++;
535	} else {
536	len = (rd->mblength & 0xfff) - 4;
537	skb = dev_alloc_skb(len + 2);
538
539	if (skb == NULL) {
540	printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
541	dev->name);
542	dev->stats.rx_dropped++;
543	rd->mblength = 0;
544	rd->rmd1_bits = LE_R1_OWN;
545	lp->rx_new = RX_NEXT(entry);
546	return;
547	}
548
549	dev->stats.rx_bytes += len;
550
551	skb_reserve(skb, 2); /* 16 byte align */
552	skb_put(skb, len); /* make room */
553	skb_copy_to_linear_data(skb,
554	(unsigned char *)&(ib->rx_buf [entry][0]),
555	len);
556	skb->protocol = eth_type_trans(skb, dev);
557	netif_rx(skb);
558	dev->stats.rx_packets++;
559	}
560
561	/* Return the packet to the pool */
562	rd->mblength = 0;
563	rd->rmd1_bits = LE_R1_OWN;
564	entry = RX_NEXT(entry);
565	}
566
567	lp->rx_new = entry;
568	}
569
570	static void lance_tx_dvma(struct net_device *dev)
571	{
572	struct lance_private *lp = netdev_priv(dev);
573	struct lance_init_block *ib = lp->init_block_mem;
574	int i, j;
575
576	spin_lock(&lp->lock);
577
578	j = lp->tx_old;
579	for (i = j; i != lp->tx_new; i = j) {
580	struct lance_tx_desc *td = &ib->btx_ring [i];
581	u8 bits = td->tmd1_bits;
582
583	/* If we hit a packet not owned by us, stop */
584	if (bits & LE_T1_OWN)
585	break;
586
587	if (bits & LE_T1_ERR) {
588	u16 status = td->misc;
589
590	dev->stats.tx_errors++;
591	if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
592	if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
593
594	if (status & LE_T3_CLOS) {
595	dev->stats.tx_carrier_errors++;
596	if (lp->auto_select) {
597	lp->tpe = 1 - lp->tpe;
598	printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
599	dev->name, lp->tpe?"TPE":"AUI");
600	STOP_LANCE(lp);
601	lp->init_ring(dev);
602	load_csrs(lp);
603	init_restart_lance(lp);
604	goto out;
605	}
606	}
607
608	/* Buffer errors and underflows turn off the
609	* transmitter, restart the adapter.
610	*/
611	if (status & (LE_T3_BUF\|LE_T3_UFL)) {
612	dev->stats.tx_fifo_errors++;
613
614	printk(KERN_ERR "%s: Tx: ERR_BUF\|ERR_UFL, restarting\n",
615	dev->name);
616	STOP_LANCE(lp);
617	lp->init_ring(dev);
618	load_csrs(lp);
619	init_restart_lance(lp);
620	goto out;
621	}
622	} else if ((bits & LE_T1_POK) == LE_T1_POK) {
623	/*
624	* So we don't count the packet more than once.
625	*/
626	td->tmd1_bits = bits & ~(LE_T1_POK);
627
628	/* One collision before packet was sent. */
629	if (bits & LE_T1_EONE)
630	dev->stats.collisions++;
631
632	/* More than one collision, be optimistic. */
633	if (bits & LE_T1_EMORE)
634	dev->stats.collisions += 2;
635
636	dev->stats.tx_packets++;
637	}
638
639	j = TX_NEXT(j);
640	}
641	lp->tx_old = j;
642	out:
643	if (netif_queue_stopped(dev) &&
644	TX_BUFFS_AVAIL > 0)
645	netif_wake_queue(dev);
646
647	spin_unlock(&lp->lock);
648	}
649
650	static void lance_piocopy_to_skb(struct sk_buff skb, void __iomem piobuf, int len)
651	{
652	u16 p16 = (u16 ) skb->data;
653	u32 *p32;
654	u8 *p8;
655	void __iomem *pbuf = piobuf;
656
657	/* We know here that both src and dest are on a 16bit boundary. */
658	*p16++ = sbus_readw(pbuf);
659	p32 = (u32 *) p16;
660	pbuf += 2;
661	len -= 2;
662
663	while (len >= 4) {
664	*p32++ = sbus_readl(pbuf);
665	pbuf += 4;
666	len -= 4;
667	}
668	p8 = (u8 *) p32;
669	if (len >= 2) {
670	p16 = (u16 *) p32;
671	*p16++ = sbus_readw(pbuf);
672	pbuf += 2;
673	len -= 2;
674	p8 = (u8 *) p16;
675	}
676	if (len >= 1)
677	*p8 = sbus_readb(pbuf);
678	}
679
680	static void lance_rx_pio(struct net_device *dev)
681	{
682	struct lance_private *lp = netdev_priv(dev);
683	struct lance_init_block __iomem *ib = lp->init_block_iomem;
684	struct lance_rx_desc __iomem *rd;
685	unsigned char bits;
686	int len, entry;
687	struct sk_buff *skb;
688
689	entry = lp->rx_new;
690	for (rd = &ib->brx_ring [entry];
691	!((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
692	rd = &ib->brx_ring [entry]) {
693
694	/* We got an incomplete frame? */
695	if ((bits & LE_R1_POK) != LE_R1_POK) {
696	dev->stats.rx_over_errors++;
697	dev->stats.rx_errors++;
698	} else if (bits & LE_R1_ERR) {
699	/* Count only the end frame as a rx error,
700	* not the beginning
701	*/
702	if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
703	if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
704	if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
705	if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
706	if (bits & LE_R1_EOP) dev->stats.rx_errors++;
707	} else {
708	len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
709	skb = dev_alloc_skb(len + 2);
710
711	if (skb == NULL) {
712	printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
713	dev->name);
714	dev->stats.rx_dropped++;
715	sbus_writew(0, &rd->mblength);
716	sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
717	lp->rx_new = RX_NEXT(entry);
718	return;
719	}
720
721	dev->stats.rx_bytes += len;
722
723	skb_reserve (skb, 2); /* 16 byte align */
724	skb_put(skb, len); /* make room */
725	lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
726	skb->protocol = eth_type_trans(skb, dev);
727	netif_rx(skb);
728	dev->stats.rx_packets++;
729	}
730
731	/* Return the packet to the pool */
732	sbus_writew(0, &rd->mblength);
733	sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
734	entry = RX_NEXT(entry);
735	}
736
737	lp->rx_new = entry;
738	}
739
740	static void lance_tx_pio(struct net_device *dev)
741	{
742	struct lance_private *lp = netdev_priv(dev);
743	struct lance_init_block __iomem *ib = lp->init_block_iomem;
744	int i, j;
745
746	spin_lock(&lp->lock);
747
748	j = lp->tx_old;
749	for (i = j; i != lp->tx_new; i = j) {
750	struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
751	u8 bits = sbus_readb(&td->tmd1_bits);
752
753	/* If we hit a packet not owned by us, stop */
754	if (bits & LE_T1_OWN)
755	break;
756
757	if (bits & LE_T1_ERR) {
758	u16 status = sbus_readw(&td->misc);
759
760	dev->stats.tx_errors++;
761	if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
762	if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
763
764	if (status & LE_T3_CLOS) {
765	dev->stats.tx_carrier_errors++;
766	if (lp->auto_select) {
767	lp->tpe = 1 - lp->tpe;
768	printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
769	dev->name, lp->tpe?"TPE":"AUI");
770	STOP_LANCE(lp);
771	lp->init_ring(dev);
772	load_csrs(lp);
773	init_restart_lance(lp);
774	goto out;
775	}
776	}
777
778	/* Buffer errors and underflows turn off the
779	* transmitter, restart the adapter.
780	*/
781	if (status & (LE_T3_BUF\|LE_T3_UFL)) {
782	dev->stats.tx_fifo_errors++;
783
784	printk(KERN_ERR "%s: Tx: ERR_BUF\|ERR_UFL, restarting\n",
785	dev->name);
786	STOP_LANCE(lp);
787	lp->init_ring(dev);
788	load_csrs(lp);
789	init_restart_lance(lp);
790	goto out;
791	}
792	} else if ((bits & LE_T1_POK) == LE_T1_POK) {
793	/*
794	* So we don't count the packet more than once.
795	*/
796	sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
797
798	/* One collision before packet was sent. */
799	if (bits & LE_T1_EONE)
800	dev->stats.collisions++;
801
802	/* More than one collision, be optimistic. */
803	if (bits & LE_T1_EMORE)
804	dev->stats.collisions += 2;
805
806	dev->stats.tx_packets++;
807	}
808
809	j = TX_NEXT(j);
810	}
811	lp->tx_old = j;
812
813	if (netif_queue_stopped(dev) &&
814	TX_BUFFS_AVAIL > 0)
815	netif_wake_queue(dev);
816	out:
817	spin_unlock(&lp->lock);
818	}
819
820	static irqreturn_t lance_interrupt(int irq, void *dev_id)
821	{
822	struct net_device *dev = dev_id;
823	struct lance_private *lp = netdev_priv(dev);
824	int csr0;
825
826	sbus_writew(LE_CSR0, lp->lregs + RAP);
827	csr0 = sbus_readw(lp->lregs + RDP);
828
829	/* Acknowledge all the interrupt sources ASAP */
830	sbus_writew(csr0 & (LE_C0_INTR \| LE_C0_TINT \| LE_C0_RINT),
831	lp->lregs + RDP);
832
833	if ((csr0 & LE_C0_ERR) != 0) {
834	/* Clear the error condition */
835	sbus_writew((LE_C0_BABL \| LE_C0_ERR \| LE_C0_MISS \|
836	LE_C0_CERR \| LE_C0_MERR),
837	lp->lregs + RDP);
838	}
839
840	if (csr0 & LE_C0_RINT)
841	lp->rx(dev);
842
843	if (csr0 & LE_C0_TINT)
844	lp->tx(dev);
845
846	if (csr0 & LE_C0_BABL)
847	dev->stats.tx_errors++;
848
849	if (csr0 & LE_C0_MISS)
850	dev->stats.rx_errors++;
851
852	if (csr0 & LE_C0_MERR) {
853	if (lp->dregs) {
854	u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
855
856	printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
857	dev->name, csr0, addr & 0xffffff);
858	} else {
859	printk(KERN_ERR "%s: Memory error, status %04x\n",
860	dev->name, csr0);
861	}
862
863	sbus_writew(LE_C0_STOP, lp->lregs + RDP);
864
865	if (lp->dregs) {
866	u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
867
868	dma_csr \|= DMA_FIFO_INV;
869	sbus_writel(dma_csr, lp->dregs + DMA_CSR);
870	}
871
872	lp->init_ring(dev);
873	load_csrs(lp);
874	init_restart_lance(lp);
875	netif_wake_queue(dev);
876	}
877
878	sbus_writew(LE_C0_INEA, lp->lregs + RDP);
879
880	return IRQ_HANDLED;
881	}
882
883	/* Build a fake network packet and send it to ourselves. */
884	static void build_fake_packet(struct lance_private *lp)
885	{
886	struct net_device *dev = lp->dev;
887	int i, entry;
888
889	entry = lp->tx_new & TX_RING_MOD_MASK;
890	if (lp->pio_buffer) {
891	struct lance_init_block __iomem *ib = lp->init_block_iomem;
892	u16 __iomem packet = (u16 __iomem ) &(ib->tx_buf[entry][0]);
893	struct ethhdr __iomem eth = (struct ethhdr __iomem ) packet;
894	for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
895	sbus_writew(0, &packet[i]);
896	for (i = 0; i < 6; i++) {
897	sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
898	sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
899	}
900	sbus_writew((-ETH_ZLEN) \| 0xf000, &ib->btx_ring[entry].length);
901	sbus_writew(0, &ib->btx_ring[entry].misc);
902	sbus_writeb(LE_T1_POK\|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
903	} else {
904	struct lance_init_block *ib = lp->init_block_mem;
905	u16 packet = (u16 ) &(ib->tx_buf[entry][0]);
906	struct ethhdr eth = (struct ethhdr ) packet;
907	memset(packet, 0, ETH_ZLEN);
908	for (i = 0; i < 6; i++) {
909	eth->h_dest[i] = dev->dev_addr[i];
910	eth->h_source[i] = dev->dev_addr[i];
911	}
912	ib->btx_ring[entry].length = (-ETH_ZLEN) \| 0xf000;
913	ib->btx_ring[entry].misc = 0;
914	ib->btx_ring[entry].tmd1_bits = (LE_T1_POK\|LE_T1_OWN);
915	}
916	lp->tx_new = TX_NEXT(entry);
917	}
918
919	static int lance_open(struct net_device *dev)
920	{
921	struct lance_private *lp = netdev_priv(dev);
922	int status = 0;
923
924	STOP_LANCE(lp);
925
926	if (request_irq(dev->irq, &lance_interrupt, IRQF_SHARED,
927	lancestr, (void *) dev)) {
928	printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
929	return -EAGAIN;
930	}
931
932	/* On the 4m, setup the ledma to provide the upper bits for buffers */
933	if (lp->dregs) {
934	u32 regval = lp->init_block_dvma & 0xff000000;
935
936	sbus_writel(regval, lp->dregs + DMA_TEST);
937	}
938
939	/* Set mode and clear multicast filter only at device open,
940	* so that lance_init_ring() called at any error will not
941	* forget multicast filters.
942	*
943	* BTW it is common bug in all lance drivers! --ANK
944	*/
945	if (lp->pio_buffer) {
946	struct lance_init_block __iomem *ib = lp->init_block_iomem;
947	sbus_writew(0, &ib->mode);
948	sbus_writel(0, &ib->filter[0]);
949	sbus_writel(0, &ib->filter[1]);
950	} else {
951	struct lance_init_block *ib = lp->init_block_mem;
952	ib->mode = 0;
953	ib->filter [0] = 0;
954	ib->filter [1] = 0;
955	}
956
957	lp->init_ring(dev);
958	load_csrs(lp);
959
960	netif_start_queue(dev);
961
962	status = init_restart_lance(lp);
963	if (!status && lp->auto_select) {
964	build_fake_packet(lp);
965	sbus_writew(LE_C0_INEA \| LE_C0_TDMD, lp->lregs + RDP);
966	}
967
968	return status;
969	}
970
971	static int lance_close(struct net_device *dev)
972	{
973	struct lance_private *lp = netdev_priv(dev);
974
975	netif_stop_queue(dev);
976	del_timer_sync(&lp->multicast_timer);
977
978	STOP_LANCE(lp);
979
980	free_irq(dev->irq, (void *) dev);
981	return 0;
982	}
983
984	static int lance_reset(struct net_device *dev)
985	{
986	struct lance_private *lp = netdev_priv(dev);
987	int status;
988
989	STOP_LANCE(lp);
990
991	/* On the 4m, reset the dma too */
992	if (lp->dregs) {
993	u32 csr, addr;
994
995	printk(KERN_ERR "resetting ledma\n");
996	csr = sbus_readl(lp->dregs + DMA_CSR);
997	sbus_writel(csr \| DMA_RST_ENET, lp->dregs + DMA_CSR);
998	udelay(200);
999	sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1000
1001	addr = lp->init_block_dvma & 0xff000000;
1002	sbus_writel(addr, lp->dregs + DMA_TEST);
1003	}
1004	lp->init_ring(dev);
1005	load_csrs(lp);
1006	dev->trans_start = jiffies;
1007	status = init_restart_lance(lp);
1008	return status;
1009	}
1010
1011	static void lance_piocopy_from_skb(void __iomem dest, unsigned char src, int len)
1012	{
1013	void __iomem *piobuf = dest;
1014	u32 *p32;
1015	u16 *p16;
1016	u8 *p8;
1017
1018	switch ((unsigned long)src & 0x3) {
1019	case 0:
1020	p32 = (u32 *) src;
1021	while (len >= 4) {
1022	sbus_writel(*p32, piobuf);
1023	p32++;
1024	piobuf += 4;
1025	len -= 4;
1026	}
1027	src = (char *) p32;
1028	break;
1029	case 1:
1030	case 3:
1031	p8 = (u8 *) src;
1032	while (len >= 4) {
1033	u32 val;
1034
1035	val = p8[0] << 24;
1036	val \|= p8[1] << 16;
1037	val \|= p8[2] << 8;
1038	val \|= p8[3];
1039	sbus_writel(val, piobuf);
1040	p8 += 4;
1041	piobuf += 4;
1042	len -= 4;
1043	}
1044	src = (char *) p8;
1045	break;
1046	case 2:
1047	p16 = (u16 *) src;
1048	while (len >= 4) {
1049	u32 val = p16[0]<<16 \| p16[1];
1050	sbus_writel(val, piobuf);
1051	p16 += 2;
1052	piobuf += 4;
1053	len -= 4;
1054	}
1055	src = (char *) p16;
1056	break;
1057	};
1058	if (len >= 2) {
1059	u16 val = src[0] << 8 \| src[1];
1060	sbus_writew(val, piobuf);
1061	src += 2;
1062	piobuf += 2;
1063	len -= 2;
1064	}
1065	if (len >= 1)
1066	sbus_writeb(src[0], piobuf);
1067	}
1068
1069	static void lance_piozero(void __iomem *dest, int len)
1070	{
1071	void __iomem *piobuf = dest;
1072
1073	if ((unsigned long)piobuf & 1) {
1074	sbus_writeb(0, piobuf);
1075	piobuf += 1;
1076	len -= 1;
1077	if (len == 0)
1078	return;
1079	}
1080	if (len == 1) {
1081	sbus_writeb(0, piobuf);
1082	return;
1083	}
1084	if ((unsigned long)piobuf & 2) {
1085	sbus_writew(0, piobuf);
1086	piobuf += 2;
1087	len -= 2;
1088	if (len == 0)
1089	return;
1090	}
1091	while (len >= 4) {
1092	sbus_writel(0, piobuf);
1093	piobuf += 4;
1094	len -= 4;
1095	}
1096	if (len >= 2) {
1097	sbus_writew(0, piobuf);
1098	piobuf += 2;
1099	len -= 2;
1100	}
1101	if (len >= 1)
1102	sbus_writeb(0, piobuf);
1103	}
1104
1105	static void lance_tx_timeout(struct net_device *dev)
1106	{
1107	struct lance_private *lp = netdev_priv(dev);
1108
1109	printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1110	dev->name, sbus_readw(lp->lregs + RDP));
1111	lance_reset(dev);
1112	netif_wake_queue(dev);
1113	}
1114
1115	static int lance_start_xmit(struct sk_buff skb, struct net_device dev)
1116	{
1117	struct lance_private *lp = netdev_priv(dev);
1118	int entry, skblen, len;
1119
1120	skblen = skb->len;
1121
1122	len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1123
1124	spin_lock_irq(&lp->lock);
1125
1126	dev->stats.tx_bytes += len;
1127
1128	entry = lp->tx_new & TX_RING_MOD_MASK;
1129	if (lp->pio_buffer) {
1130	struct lance_init_block __iomem *ib = lp->init_block_iomem;
1131	sbus_writew((-len) \| 0xf000, &ib->btx_ring[entry].length);
1132	sbus_writew(0, &ib->btx_ring[entry].misc);
1133	lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1134	if (len != skblen)
1135	lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1136	sbus_writeb(LE_T1_POK \| LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1137	} else {
1138	struct lance_init_block *ib = lp->init_block_mem;
1139	ib->btx_ring [entry].length = (-len) \| 0xf000;
1140	ib->btx_ring [entry].misc = 0;
1141	skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1142	if (len != skblen)
1143	memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1144	ib->btx_ring [entry].tmd1_bits = (LE_T1_POK \| LE_T1_OWN);
1145	}
1146
1147	lp->tx_new = TX_NEXT(entry);
1148
1149	if (TX_BUFFS_AVAIL <= 0)
1150	netif_stop_queue(dev);
1151
1152	/* Kick the lance: transmit now */
1153	sbus_writew(LE_C0_INEA \| LE_C0_TDMD, lp->lregs + RDP);
1154
1155	/* Read back CSR to invalidate the E-Cache.
1156	* This is needed, because DMA_DSBL_WR_INV is set.
1157	*/
1158	if (lp->dregs)
1159	sbus_readw(lp->lregs + RDP);
1160
1161	spin_unlock_irq(&lp->lock);
1162
1163	dev->trans_start = jiffies;
1164	dev_kfree_skb(skb);
1165
1166	return 0;
1167	}
1168
1169	/* taken from the depca driver */
1170	static void lance_load_multicast(struct net_device *dev)
1171	{
1172	struct lance_private *lp = netdev_priv(dev);
1173	struct dev_mc_list *dmi = dev->mc_list;
1174	char *addrs;
1175	int i;
1176	u32 crc;
1177	u32 val;
1178
1179	/* set all multicast bits */
1180	if (dev->flags & IFF_ALLMULTI)
1181	val = ~0;
1182	else
1183	val = 0;
1184
1185	if (lp->pio_buffer) {
1186	struct lance_init_block __iomem *ib = lp->init_block_iomem;
1187	sbus_writel(val, &ib->filter[0]);
1188	sbus_writel(val, &ib->filter[1]);
1189	} else {
1190	struct lance_init_block *ib = lp->init_block_mem;
1191	ib->filter [0] = val;
1192	ib->filter [1] = val;
1193	}
1194
1195	if (dev->flags & IFF_ALLMULTI)
1196	return;
1197
1198	/* Add addresses */
1199	for (i = 0; i < dev->mc_count; i++) {
1200	addrs = dmi->dmi_addr;
1201	dmi = dmi->next;
1202
1203	/* multicast address? */
1204	if (!(*addrs & 1))
1205	continue;
1206	crc = ether_crc_le(6, addrs);
1207	crc = crc >> 26;
1208	if (lp->pio_buffer) {
1209	struct lance_init_block __iomem *ib = lp->init_block_iomem;
1210	u16 __iomem mcast_table = (u16 __iomem ) &ib->filter;
1211	u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1212	tmp \|= 1 << (crc & 0xf);
1213	sbus_writew(tmp, &mcast_table[crc>>4]);
1214	} else {
1215	struct lance_init_block *ib = lp->init_block_mem;
1216	u16 mcast_table = (u16 ) &ib->filter;
1217	mcast_table [crc >> 4] \|= 1 << (crc & 0xf);
1218	}
1219	}
1220	}
1221
1222	static void lance_set_multicast(struct net_device *dev)
1223	{
1224	struct lance_private *lp = netdev_priv(dev);
1225	struct lance_init_block *ib_mem = lp->init_block_mem;
1226	struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1227	u16 mode;
1228
1229	if (!netif_running(dev))
1230	return;
1231
1232	if (lp->tx_old != lp->tx_new) {
1233	mod_timer(&lp->multicast_timer, jiffies + 4);
1234	netif_wake_queue(dev);
1235	return;
1236	}
1237
1238	netif_stop_queue(dev);
1239
1240	STOP_LANCE(lp);
1241	lp->init_ring(dev);
1242
1243	if (lp->pio_buffer)
1244	mode = sbus_readw(&ib_iomem->mode);
1245	else
1246	mode = ib_mem->mode;
1247	if (dev->flags & IFF_PROMISC) {
1248	mode \|= LE_MO_PROM;
1249	if (lp->pio_buffer)
1250	sbus_writew(mode, &ib_iomem->mode);
1251	else
1252	ib_mem->mode = mode;
1253	} else {
1254	mode &= ~LE_MO_PROM;
1255	if (lp->pio_buffer)
1256	sbus_writew(mode, &ib_iomem->mode);
1257	else
1258	ib_mem->mode = mode;
1259	lance_load_multicast(dev);
1260	}
1261	load_csrs(lp);
1262	init_restart_lance(lp);
1263	netif_wake_queue(dev);
1264	}
1265
1266	static void lance_set_multicast_retry(unsigned long _opaque)
1267	{
1268	struct net_device dev = (struct net_device ) _opaque;
1269
1270	lance_set_multicast(dev);
1271	}
1272
1273	static void lance_free_hwresources(struct lance_private *lp)
1274	{
1275	if (lp->lregs)
1276	of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
1277	if (lp->dregs) {
1278	struct of_device *ledma = lp->ledma;
1279
1280	of_iounmap(&ledma->resource[0], lp->dregs,
1281	resource_size(&ledma->resource[0]));
1282	}
1283	if (lp->init_block_iomem) {
1284	of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
1285	sizeof(struct lance_init_block));
1286	} else if (lp->init_block_mem) {
1287	dma_free_coherent(&lp->op->dev,
1288	sizeof(struct lance_init_block),
1289	lp->init_block_mem,
1290	lp->init_block_dvma);
1291	}
1292	}
1293
1294	/* Ethtool support... */
1295	static void sparc_lance_get_drvinfo(struct net_device dev, struct ethtool_drvinfo info)
1296	{
1297	strcpy(info->driver, "sunlance");
1298	strcpy(info->version, "2.02");
1299	}
1300
1301	static u32 sparc_lance_get_link(struct net_device *dev)
1302	{
1303	/* We really do not keep track of this, but this
1304	* is better than not reporting anything at all.
1305	*/
1306	return 1;
1307	}
1308
1309	static const struct ethtool_ops sparc_lance_ethtool_ops = {
1310	.get_drvinfo = sparc_lance_get_drvinfo,
1311	.get_link = sparc_lance_get_link,
1312	};
1313
1314	static const struct net_device_ops sparc_lance_ops = {
1315	.ndo_open = lance_open,
1316	.ndo_stop = lance_close,
1317	.ndo_start_xmit = lance_start_xmit,
1318	.ndo_set_multicast_list = lance_set_multicast,
1319	.ndo_tx_timeout = lance_tx_timeout,
1320	.ndo_change_mtu = eth_change_mtu,
1321	.ndo_set_mac_address = eth_mac_addr,
1322	.ndo_validate_addr = eth_validate_addr,
1323	};
1324
1325	static int __devinit sparc_lance_probe_one(struct of_device *op,
1326	struct of_device *ledma,
1327	struct of_device *lebuffer)
1328	{
1329	struct device_node *dp = op->node;
1330	static unsigned version_printed;
1331	struct lance_private *lp;
1332	struct net_device *dev;
1333	int i;
1334
1335	dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1336	if (!dev)
1337	return -ENOMEM;
1338
1339	lp = netdev_priv(dev);
1340
1341	if (sparc_lance_debug && version_printed++ == 0)
1342	printk (KERN_INFO "%s", version);
1343
1344	spin_lock_init(&lp->lock);
1345
1346	/* Copy the IDPROM ethernet address to the device structure, later we
1347	* will copy the address in the device structure to the lance
1348	* initialization block.
1349	*/
1350	for (i = 0; i < 6; i++)
1351	dev->dev_addr[i] = idprom->id_ethaddr[i];
1352
1353	/* Get the IO region */
1354	lp->lregs = of_ioremap(&op->resource[0], 0,
1355	LANCE_REG_SIZE, lancestr);
1356	if (!lp->lregs) {
1357	printk(KERN_ERR "SunLance: Cannot map registers.\n");
1358	goto fail;
1359	}
1360
1361	lp->ledma = ledma;
1362	if (lp->ledma) {
1363	lp->dregs = of_ioremap(&ledma->resource[0], 0,
1364	resource_size(&ledma->resource[0]),
1365	"ledma");
1366	if (!lp->dregs) {
1367	printk(KERN_ERR "SunLance: Cannot map "
1368	"ledma registers.\n");
1369	goto fail;
1370	}
1371	}
1372
1373	lp->op = op;
1374	lp->lebuffer = lebuffer;
1375	if (lebuffer) {
1376	/* sanity check */
1377	if (lebuffer->resource[0].start & 7) {
1378	printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1379	goto fail;
1380	}
1381	lp->init_block_iomem =
1382	of_ioremap(&lebuffer->resource[0], 0,
1383	sizeof(struct lance_init_block), "lebuffer");
1384	if (!lp->init_block_iomem) {
1385	printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1386	goto fail;
1387	}
1388	lp->init_block_dvma = 0;
1389	lp->pio_buffer = 1;
1390	lp->init_ring = lance_init_ring_pio;
1391	lp->rx = lance_rx_pio;
1392	lp->tx = lance_tx_pio;
1393	} else {
1394	lp->init_block_mem =
1395	dma_alloc_coherent(&op->dev,
1396	sizeof(struct lance_init_block),
1397	&lp->init_block_dvma, GFP_ATOMIC);
1398	if (!lp->init_block_mem) {
1399	printk(KERN_ERR "SunLance: Cannot allocate consistent DMA memory.\n");
1400	goto fail;
1401	}
1402	lp->pio_buffer = 0;
1403	lp->init_ring = lance_init_ring_dvma;
1404	lp->rx = lance_rx_dvma;
1405	lp->tx = lance_tx_dvma;
1406	}
1407	lp->busmaster_regval = of_getintprop_default(dp, "busmaster-regval",
1408	(LE_C3_BSWP \|
1409	LE_C3_ACON \|
1410	LE_C3_BCON));
1411
1412	lp->name = lancestr;
1413
1414	lp->burst_sizes = 0;
1415	if (lp->ledma) {
1416	struct device_node *ledma_dp = ledma->node;
1417	struct device_node *sbus_dp;
1418	unsigned int sbmask;
1419	const char *prop;
1420	u32 csr;
1421
1422	/* Find burst-size property for ledma */
1423	lp->burst_sizes = of_getintprop_default(ledma_dp,
1424	"burst-sizes", 0);
1425
1426	/* ledma may be capable of fast bursts, but sbus may not. */
1427	sbus_dp = ledma_dp->parent;
1428	sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
1429	DMA_BURSTBITS);
1430	lp->burst_sizes &= sbmask;
1431
1432	/* Get the cable-selection property */
1433	prop = of_get_property(ledma_dp, "cable-selection", NULL);
1434	if (!prop \|\| prop[0] == '\0') {
1435	struct device_node *nd;
1436
1437	printk(KERN_INFO "SunLance: using "
1438	"auto-carrier-detection.\n");
1439
1440	nd = of_find_node_by_path("/options");
1441	if (!nd)
1442	goto no_link_test;
1443
1444	prop = of_get_property(nd, "tpe-link-test?", NULL);
1445	if (!prop)
1446	goto no_link_test;
1447
1448	if (strcmp(prop, "true")) {
1449	printk(KERN_NOTICE "SunLance: warning: overriding option "
1450	"'tpe-link-test?'\n");
1451	printk(KERN_NOTICE "SunLance: warning: mail any problems "
1452	"to ecd@skynet.be\n");
1453	auxio_set_lte(AUXIO_LTE_ON);
1454	}
1455	no_link_test:
1456	lp->auto_select = 1;
1457	lp->tpe = 0;
1458	} else if (!strcmp(prop, "aui")) {
1459	lp->auto_select = 0;
1460	lp->tpe = 0;
1461	} else {
1462	lp->auto_select = 0;
1463	lp->tpe = 1;
1464	}
1465
1466	/* Reset ledma */
1467	csr = sbus_readl(lp->dregs + DMA_CSR);
1468	sbus_writel(csr \| DMA_RST_ENET, lp->dregs + DMA_CSR);
1469	udelay(200);
1470	sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1471	} else
1472	lp->dregs = NULL;
1473
1474	lp->dev = dev;
1475	SET_NETDEV_DEV(dev, &op->dev);
1476	dev->watchdog_timeo = 5*HZ;
1477	dev->ethtool_ops = &sparc_lance_ethtool_ops;
1478	dev->netdev_ops = &sparc_lance_ops;
1479
1480	dev->irq = op->irqs[0];
1481
1482	/* We cannot sleep if the chip is busy during a
1483	* multicast list update event, because such events
1484	* can occur from interrupts (ex. IPv6). So we
1485	* use a timer to try again later when necessary. -DaveM
1486	*/
1487	init_timer(&lp->multicast_timer);
1488	lp->multicast_timer.data = (unsigned long) dev;
1489	lp->multicast_timer.function = &lance_set_multicast_retry;
1490
1491	if (register_netdev(dev)) {
1492	printk(KERN_ERR "SunLance: Cannot register device.\n");
1493	goto fail;
1494	}
1495
1496	dev_set_drvdata(&op->dev, lp);
1497
1498	printk(KERN_INFO "%s: LANCE %pM\n",
1499	dev->name, dev->dev_addr);
1500
1501	return 0;
1502
1503	fail:
1504	lance_free_hwresources(lp);
1505	free_netdev(dev);
1506	return -ENODEV;
1507	}
1508
1509	static int __devinit sunlance_sbus_probe(struct of_device op, const struct of_device_id match)
1510	{
1511	struct of_device *parent = to_of_device(op->dev.parent);
1512	struct device_node *parent_dp = parent->node;
1513	int err;
1514
1515	if (!strcmp(parent_dp->name, "ledma")) {
1516	err = sparc_lance_probe_one(op, parent, NULL);
1517	} else if (!strcmp(parent_dp->name, "lebuffer")) {
1518	err = sparc_lance_probe_one(op, NULL, parent);
1519	} else
1520	err = sparc_lance_probe_one(op, NULL, NULL);
1521
1522	return err;
1523	}
1524
1525	static int __devexit sunlance_sbus_remove(struct of_device *op)
1526	{
1527	struct lance_private *lp = dev_get_drvdata(&op->dev);
1528	struct net_device *net_dev = lp->dev;
1529
1530	unregister_netdev(net_dev);
1531
1532	lance_free_hwresources(lp);
1533
1534	free_netdev(net_dev);
1535
1536	dev_set_drvdata(&op->dev, NULL);
1537
1538	return 0;
1539	}
1540
1541	static const struct of_device_id sunlance_sbus_match[] = {
1542	{
1543	.name = "le",
1544	},
1545	{},
1546	};
1547
1548	MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1549
1550	static struct of_platform_driver sunlance_sbus_driver = {
1551	.name = "sunlance",
1552	.match_table = sunlance_sbus_match,
1553	.probe = sunlance_sbus_probe,
1554	.remove = __devexit_p(sunlance_sbus_remove),
1555	};
1556
1557
1558	/* Find all the lance cards on the system and initialize them */
1559	static int __init sparc_lance_init(void)
1560	{
1561	return of_register_driver(&sunlance_sbus_driver, &of_bus_type);
1562	}
1563
1564	static void __exit sparc_lance_exit(void)
1565	{
1566	of_unregister_driver(&sunlance_sbus_driver);
1567	}
1568
1569	module_init(sparc_lance_init);
1570	module_exit(sparc_lance_exit);
1571

Download this file

Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.2
jz-3.3
jz-3.4
jz47xx
jz47xx-2.6.38
master
xiangfu/openwrt/v3.0.0
xiangfu/openwrt/v3.2.1

Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7

Kernel

Kernel Git Source Tree

Root/drivers/net/sunlance.c

interactive