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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[deliverable/linux.git] / drivers / net / sunlance.c
CommitLineData
1da177e4
LT		 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)
6aa20a22 67 *
1da177e4
LT		 68 */
69
70#undef DEBUG_DRIVER
71
1da177e4
LT		 72static char lancestr[] = "LANCE";
73
1da177e4
LT		 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
95#include <asm/system.h>
96#include <asm/io.h>
97#include <asm/dma.h>
98#include <asm/pgtable.h>
99#include <asm/byteorder.h> /* Used by the checksum routines */
100#include <asm/idprom.h>
101#include <asm/sbus.h>
76fcdb30 102#include <asm/prom.h>
1da177e4
LT		 103#include <asm/auxio.h> /* For tpe-link-test? setting */
104#include <asm/irq.h>
105
10158286
TC		 106#define DRV_NAME "sunlance"
107#define DRV_VERSION "2.02"
108#define DRV_RELDATE "8/24/03"
109#define DRV_AUTHOR "Miguel de Icaza (miguel@nuclecu.unam.mx)"
110
111static char version[] =
112 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
113
114MODULE_VERSION(DRV_VERSION);
115MODULE_AUTHOR(DRV_AUTHOR);
116MODULE_DESCRIPTION("Sun Lance ethernet driver");
117MODULE_LICENSE("GPL");
118
1da177e4
LT		 119/* Define: 2^4 Tx buffers and 2^4 Rx buffers */
120#ifndef LANCE_LOG_TX_BUFFERS
121#define LANCE_LOG_TX_BUFFERS 4
122#define LANCE_LOG_RX_BUFFERS 4
123#endif
124
125#define LE_CSR0 0
126#define LE_CSR1 1
127#define LE_CSR2 2
128#define LE_CSR3 3
129
130#define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
131
132#define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
133#define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
134#define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
135#define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
136#define LE_C0_MERR 0x0800 /* ME: Memory error */
137#define LE_C0_RINT 0x0400 /* Received interrupt */
138#define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
139#define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
140#define LE_C0_INTR 0x0080 /* Interrupt or error */
141#define LE_C0_INEA 0x0040 /* Interrupt enable */
142#define LE_C0_RXON 0x0020 /* Receiver on */
143#define LE_C0_TXON 0x0010 /* Transmitter on */
144#define LE_C0_TDMD 0x0008 /* Transmitter demand */
145#define LE_C0_STOP 0x0004 /* Stop the card */
146#define LE_C0_STRT 0x0002 /* Start the card */
147#define LE_C0_INIT 0x0001 /* Init the card */
148
149#define LE_C3_BSWP 0x4 /* SWAP */
150#define LE_C3_ACON 0x2 /* ALE Control */
151#define LE_C3_BCON 0x1 /* Byte control */
152
153/* Receive message descriptor 1 */
154#define LE_R1_OWN 0x80 /* Who owns the entry */
155#define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */
156#define LE_R1_FRA 0x20 /* FRA: Frame error */
157#define LE_R1_OFL 0x10 /* OFL: Frame overflow */
158#define LE_R1_CRC 0x08 /* CRC error */
159#define LE_R1_BUF 0x04 /* BUF: Buffer error */
160#define LE_R1_SOP 0x02 /* Start of packet */
161#define LE_R1_EOP 0x01 /* End of packet */
162#define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */
163
164#define LE_T1_OWN 0x80 /* Lance owns the packet */
165#define LE_T1_ERR 0x40 /* Error summary */
166#define LE_T1_EMORE 0x10 /* Error: more than one retry needed */
167#define LE_T1_EONE 0x08 /* Error: one retry needed */
168#define LE_T1_EDEF 0x04 /* Error: deferred */
169#define LE_T1_SOP 0x02 /* Start of packet */
170#define LE_T1_EOP 0x01 /* End of packet */
171#define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */
172
173#define LE_T3_BUF 0x8000 /* Buffer error */
174#define LE_T3_UFL 0x4000 /* Error underflow */
175#define LE_T3_LCOL 0x1000 /* Error late collision */
176#define LE_T3_CLOS 0x0800 /* Error carrier loss */
177#define LE_T3_RTY 0x0400 /* Error retry */
178#define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
179
180#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
181#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
182#define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
183#define TX_NEXT(__x) (((__x)+1) & TX_RING_MOD_MASK)
184
185#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
186#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
187#define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
188#define RX_NEXT(__x) (((__x)+1) & RX_RING_MOD_MASK)
189
190#define PKT_BUF_SZ 1544
191#define RX_BUFF_SIZE PKT_BUF_SZ
192#define TX_BUFF_SIZE PKT_BUF_SZ
193
194struct lance_rx_desc {
195 u16 rmd0; /* low address of packet */
196 u8 rmd1_bits; /* descriptor bits */
197 u8 rmd1_hadr; /* high address of packet */
198 s16 length; /* This length is 2s complement (negative)!
199 * Buffer length
200 */
201 u16 mblength; /* This is the actual number of bytes received */
202};
203
204struct lance_tx_desc {
205 u16 tmd0; /* low address of packet */
206 u8 tmd1_bits; /* descriptor bits */
207 u8 tmd1_hadr; /* high address of packet */
208 s16 length; /* Length is 2s complement (negative)! */
209 u16 misc;
210};
6aa20a22 211
1da177e4
LT		 212/* The LANCE initialization block, described in databook. */
213/* On the Sparc, this block should be on a DMA region */
214struct lance_init_block {
215 u16 mode; /* Pre-set mode (reg. 15) */
216 u8 phys_addr[6]; /* Physical ethernet address */
217 u32 filter[2]; /* Multicast filter. */
218
219 /* Receive and transmit ring base, along with extra bits. */
220 u16 rx_ptr; /* receive descriptor addr */
221 u16 rx_len; /* receive len and high addr */
222 u16 tx_ptr; /* transmit descriptor addr */
223 u16 tx_len; /* transmit len and high addr */
6aa20a22 224
1da177e4
LT		 225 /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
226 struct lance_rx_desc brx_ring[RX_RING_SIZE];
227 struct lance_tx_desc btx_ring[TX_RING_SIZE];
6aa20a22 228
1da177e4
LT		 229 u8 tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
230 u8 pad[2]; /* align rx_buf for copy_and_sum(). */
231 u8 rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
232};
233
234#define libdesc_offset(rt, elem) \
235((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
236
237#define libbuff_offset(rt, elem) \
238((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
239
240struct lance_private {
241 void __iomem *lregs; /* Lance RAP/RDP regs. */
242 void __iomem *dregs; /* DMA controller regs. */
243 struct lance_init_block __iomem *init_block_iomem;
244 struct lance_init_block *init_block_mem;
6aa20a22 245
1da177e4
LT		 246 spinlock_t lock;
247
248 int rx_new, tx_new;
249 int rx_old, tx_old;
6aa20a22 250
1da177e4
LT		 251 struct sbus_dma *ledma; /* If set this points to ledma */
252 char tpe; /* cable-selection is TPE */
253 char auto_select; /* cable-selection by carrier */
254 char burst_sizes; /* ledma SBus burst sizes */
255 char pio_buffer; /* init block in PIO space? */
256
257 unsigned short busmaster_regval;
258
259 void (*init_ring)(struct net_device *);
260 void (*rx)(struct net_device *);
261 void (*tx)(struct net_device *);
262
263 char *name;
264 dma_addr_t init_block_dvma;
265 struct net_device *dev; /* Backpointer */
1da177e4
LT		 266 struct sbus_dev *sdev;
267 struct timer_list multicast_timer;
268};
269
270#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
271 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
272 lp->tx_old - lp->tx_new-1)
273
274/* Lance registers. */
275#define RDP 0x00UL /* register data port */
276#define RAP 0x02UL /* register address port */
277#define LANCE_REG_SIZE 0x04UL
278
279#define STOP_LANCE(__lp) \
280do { void __iomem *__base = (__lp)->lregs; \
281 sbus_writew(LE_CSR0, __base + RAP); \
282 sbus_writew(LE_C0_STOP, __base + RDP); \
283} while (0)
284
285int sparc_lance_debug = 2;
286
287/* The Lance uses 24 bit addresses */
288/* On the Sun4c the DVMA will provide the remaining bytes for us */
289/* On the Sun4m we have to instruct the ledma to provide them */
290/* Even worse, on scsi/ether SBUS cards, the init block and the
291 * transmit/receive buffers are addresses as offsets from absolute
292 * zero on the lebuffer PIO area. -DaveM
293 */
294
295#define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
296
1da177e4
LT		 297/* Load the CSR registers */
298static void load_csrs(struct lance_private *lp)
299{
300 u32 leptr;
301
302 if (lp->pio_buffer)
303 leptr = 0;
304 else
305 leptr = LANCE_ADDR(lp->init_block_dvma);
306
307 sbus_writew(LE_CSR1, lp->lregs + RAP);
308 sbus_writew(leptr & 0xffff, lp->lregs + RDP);
309 sbus_writew(LE_CSR2, lp->lregs + RAP);
310 sbus_writew(leptr >> 16, lp->lregs + RDP);
311 sbus_writew(LE_CSR3, lp->lregs + RAP);
312 sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
313
314 /* Point back to csr0 */
315 sbus_writew(LE_CSR0, lp->lregs + RAP);
316}
317
318/* Setup the Lance Rx and Tx rings */
319static void lance_init_ring_dvma(struct net_device *dev)
320{
321 struct lance_private *lp = netdev_priv(dev);
322 struct lance_init_block *ib = lp->init_block_mem;
323 dma_addr_t aib = lp->init_block_dvma;
324 __u32 leptr;
325 int i;
6aa20a22 326
1da177e4
LT		 327 /* Lock out other processes while setting up hardware */
328 netif_stop_queue(dev);
329 lp->rx_new = lp->tx_new = 0;
330 lp->rx_old = lp->tx_old = 0;
331
332 /* Copy the ethernet address to the lance init block
333 * Note that on the sparc you need to swap the ethernet address.
334 */
335 ib->phys_addr [0] = dev->dev_addr [1];
336 ib->phys_addr [1] = dev->dev_addr [0];
337 ib->phys_addr [2] = dev->dev_addr [3];
338 ib->phys_addr [3] = dev->dev_addr [2];
339 ib->phys_addr [4] = dev->dev_addr [5];
340 ib->phys_addr [5] = dev->dev_addr [4];
341
342 /* Setup the Tx ring entries */
343 for (i = 0; i <= TX_RING_SIZE; i++) {
344 leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
345 ib->btx_ring [i].tmd0 = leptr;
346 ib->btx_ring [i].tmd1_hadr = leptr >> 16;
347 ib->btx_ring [i].tmd1_bits = 0;
348 ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */
349 ib->btx_ring [i].misc = 0;
350 }
351
352 /* Setup the Rx ring entries */
353 for (i = 0; i < RX_RING_SIZE; i++) {
354 leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
355
356 ib->brx_ring [i].rmd0 = leptr;
357 ib->brx_ring [i].rmd1_hadr = leptr >> 16;
358 ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
359 ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000;
360 ib->brx_ring [i].mblength = 0;
361 }
362
363 /* Setup the initialization block */
6aa20a22 364
1da177e4
LT		 365 /* Setup rx descriptor pointer */
366 leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
367 ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
368 ib->rx_ptr = leptr;
6aa20a22 369
1da177e4
LT		 370 /* Setup tx descriptor pointer */
371 leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
372 ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
373 ib->tx_ptr = leptr;
374}
375
376static void lance_init_ring_pio(struct net_device *dev)
377{
378 struct lance_private *lp = netdev_priv(dev);
379 struct lance_init_block __iomem *ib = lp->init_block_iomem;
380 u32 leptr;
381 int i;
6aa20a22 382
1da177e4
LT		 383 /* Lock out other processes while setting up hardware */
384 netif_stop_queue(dev);
385 lp->rx_new = lp->tx_new = 0;
386 lp->rx_old = lp->tx_old = 0;
387
388 /* Copy the ethernet address to the lance init block
389 * Note that on the sparc you need to swap the ethernet address.
390 */
391 sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
392 sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
393 sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
394 sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
395 sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
396 sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
397
398 /* Setup the Tx ring entries */
399 for (i = 0; i <= TX_RING_SIZE; i++) {
400 leptr = libbuff_offset(tx_buf, i);
401 sbus_writew(leptr, &ib->btx_ring [i].tmd0);
402 sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
403 sbus_writeb(0, &ib->btx_ring [i].tmd1_bits);
404
405 /* The ones required by tmd2 */
406 sbus_writew(0xf000, &ib->btx_ring [i].length);
407 sbus_writew(0, &ib->btx_ring [i].misc);
408 }
409
410 /* Setup the Rx ring entries */
411 for (i = 0; i < RX_RING_SIZE; i++) {
412 leptr = libbuff_offset(rx_buf, i);
413
414 sbus_writew(leptr, &ib->brx_ring [i].rmd0);
415 sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
416 sbus_writeb(LE_R1_OWN, &ib->brx_ring [i].rmd1_bits);
417 sbus_writew(-RX_BUFF_SIZE|0xf000,
418 &ib->brx_ring [i].length);
419 sbus_writew(0, &ib->brx_ring [i].mblength);
420 }
421
422 /* Setup the initialization block */
6aa20a22 423
1da177e4
LT		 424 /* Setup rx descriptor pointer */
425 leptr = libdesc_offset(brx_ring, 0);
426 sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
427 &ib->rx_len);
428 sbus_writew(leptr, &ib->rx_ptr);
6aa20a22 429
1da177e4
LT		 430 /* Setup tx descriptor pointer */
431 leptr = libdesc_offset(btx_ring, 0);
432 sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
433 &ib->tx_len);
434 sbus_writew(leptr, &ib->tx_ptr);
435}
436
437static void init_restart_ledma(struct lance_private *lp)
438{
439 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
440
441 if (!(csr & DMA_HNDL_ERROR)) {
442 /* E-Cache draining */
443 while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
444 barrier();
445 }
446
447 csr = sbus_readl(lp->dregs + DMA_CSR);
448 csr &= ~DMA_E_BURSTS;
449 if (lp->burst_sizes & DMA_BURST32)
450 csr |= DMA_E_BURST32;
451 else
452 csr |= DMA_E_BURST16;
453
454 csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
455
456 if (lp->tpe)
457 csr |= DMA_EN_ENETAUI;
458 else
459 csr &= ~DMA_EN_ENETAUI;
460 udelay(20);
461 sbus_writel(csr, lp->dregs + DMA_CSR);
462 udelay(200);
463}
464
465static int init_restart_lance(struct lance_private *lp)
466{
467 u16 regval = 0;
468 int i;
469
470 if (lp->dregs)
471 init_restart_ledma(lp);
472
473 sbus_writew(LE_CSR0, lp->lregs + RAP);
474 sbus_writew(LE_C0_INIT, lp->lregs + RDP);
475
476 /* Wait for the lance to complete initialization */
477 for (i = 0; i < 100; i++) {
478 regval = sbus_readw(lp->lregs + RDP);
479
480 if (regval & (LE_C0_ERR | LE_C0_IDON))
481 break;
482 barrier();
483 }
484 if (i == 100 || (regval & LE_C0_ERR)) {
485 printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
486 i, regval);
487 if (lp->dregs)
488 printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
489 return -1;
490 }
491
492 /* Clear IDON by writing a "1", enable interrupts and start lance */
493 sbus_writew(LE_C0_IDON, lp->lregs + RDP);
494 sbus_writew(LE_C0_INEA | LE_C0_STRT, lp->lregs + RDP);
495
496 if (lp->dregs) {
497 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
498
499 csr |= DMA_INT_ENAB;
500 sbus_writel(csr, lp->dregs + DMA_CSR);
501 }
502
503 return 0;
504}
505
506static void lance_rx_dvma(struct net_device *dev)
507{
508 struct lance_private *lp = netdev_priv(dev);
509 struct lance_init_block *ib = lp->init_block_mem;
510 struct lance_rx_desc *rd;
511 u8 bits;
512 int len, entry = lp->rx_new;
513 struct sk_buff *skb;
514
515 for (rd = &ib->brx_ring [entry];
516 !((bits = rd->rmd1_bits) & LE_R1_OWN);
517 rd = &ib->brx_ring [entry]) {
518
519 /* We got an incomplete frame? */
520 if ((bits & LE_R1_POK) != LE_R1_POK) {
09f75cd7
JG		 521 dev->stats.rx_over_errors++;
522 dev->stats.rx_errors++;
1da177e4
LT		 523 } else if (bits & LE_R1_ERR) {
524 /* Count only the end frame as a rx error,
525 * not the beginning
526 */
09f75cd7
JG		 527 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
528 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
529 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
530 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
531 if (bits & LE_R1_EOP) dev->stats.rx_errors++;
1da177e4
LT		 532 } else {
533 len = (rd->mblength & 0xfff) - 4;
534 skb = dev_alloc_skb(len + 2);
535
536 if (skb == NULL) {
537 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
538 dev->name);
09f75cd7 539 dev->stats.rx_dropped++;
1da177e4
LT		 540 rd->mblength = 0;
541 rd->rmd1_bits = LE_R1_OWN;
542 lp->rx_new = RX_NEXT(entry);
543 return;
544 }
6aa20a22 545
09f75cd7 546 dev->stats.rx_bytes += len;
1da177e4 547
1da177e4
LT		 548 skb_reserve(skb, 2); /* 16 byte align */
549 skb_put(skb, len); /* make room */
8c7b7faa 550 skb_copy_to_linear_data(skb,
1da177e4 551 (unsigned char *)&(ib->rx_buf [entry][0]),
8c7b7faa 552 len);
1da177e4
LT		 553 skb->protocol = eth_type_trans(skb, dev);
554 netif_rx(skb);
555 dev->last_rx = jiffies;
09f75cd7 556 dev->stats.rx_packets++;
1da177e4
LT		 557 }
558
559 /* Return the packet to the pool */
560 rd->mblength = 0;
561 rd->rmd1_bits = LE_R1_OWN;
562 entry = RX_NEXT(entry);
563 }
564
565 lp->rx_new = entry;
566}
567
568static void lance_tx_dvma(struct net_device *dev)
569{
570 struct lance_private *lp = netdev_priv(dev);
571 struct lance_init_block *ib = lp->init_block_mem;
572 int i, j;
573
574 spin_lock(&lp->lock);
575
576 j = lp->tx_old;
577 for (i = j; i != lp->tx_new; i = j) {
578 struct lance_tx_desc *td = &ib->btx_ring [i];
579 u8 bits = td->tmd1_bits;
580
581 /* If we hit a packet not owned by us, stop */
582 if (bits & LE_T1_OWN)
583 break;
6aa20a22 584
1da177e4
LT		 585 if (bits & LE_T1_ERR) {
586 u16 status = td->misc;
6aa20a22 587
09f75cd7
JG		 588 dev->stats.tx_errors++;
589 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
590 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
1da177e4
LT		 591
592 if (status & LE_T3_CLOS) {
09f75cd7 593 dev->stats.tx_carrier_errors++;
1da177e4
LT		 594 if (lp->auto_select) {
595 lp->tpe = 1 - lp->tpe;
596 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
597 dev->name, lp->tpe?"TPE":"AUI");
598 STOP_LANCE(lp);
599 lp->init_ring(dev);
600 load_csrs(lp);
601 init_restart_lance(lp);
602 goto out;
603 }
604 }
605
606 /* Buffer errors and underflows turn off the
607 * transmitter, restart the adapter.
608 */
609 if (status & (LE_T3_BUF|LE_T3_UFL)) {
09f75cd7 610 dev->stats.tx_fifo_errors++;
1da177e4
LT		 611
612 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
613 dev->name);
614 STOP_LANCE(lp);
615 lp->init_ring(dev);
616 load_csrs(lp);
617 init_restart_lance(lp);
618 goto out;
619 }
620 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
621 /*
622 * So we don't count the packet more than once.
623 */
624 td->tmd1_bits = bits & ~(LE_T1_POK);
625
626 /* One collision before packet was sent. */
627 if (bits & LE_T1_EONE)
09f75cd7 628 dev->stats.collisions++;
1da177e4
LT		 629
630 /* More than one collision, be optimistic. */
631 if (bits & LE_T1_EMORE)
09f75cd7 632 dev->stats.collisions += 2;
1da177e4 633
09f75cd7 634 dev->stats.tx_packets++;
1da177e4 635 }
6aa20a22 636
1da177e4
LT		 637 j = TX_NEXT(j);
638 }
639 lp->tx_old = j;
640out:
641 if (netif_queue_stopped(dev) &&
642 TX_BUFFS_AVAIL > 0)
643 netif_wake_queue(dev);
644
645 spin_unlock(&lp->lock);
646}
647
648static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
649{
650 u16 *p16 = (u16 *) skb->data;
651 u32 *p32;
652 u8 *p8;
653 void __iomem *pbuf = piobuf;
654
655 /* We know here that both src and dest are on a 16bit boundary. */
656 *p16++ = sbus_readw(pbuf);
657 p32 = (u32 *) p16;
658 pbuf += 2;
659 len -= 2;
660
661 while (len >= 4) {
662 *p32++ = sbus_readl(pbuf);
663 pbuf += 4;
664 len -= 4;
665 }
666 p8 = (u8 *) p32;
667 if (len >= 2) {
668 p16 = (u16 *) p32;
669 *p16++ = sbus_readw(pbuf);
670 pbuf += 2;
671 len -= 2;
672 p8 = (u8 *) p16;
673 }
674 if (len >= 1)
675 *p8 = sbus_readb(pbuf);
676}
677
678static void lance_rx_pio(struct net_device *dev)
679{
680 struct lance_private *lp = netdev_priv(dev);
681 struct lance_init_block __iomem *ib = lp->init_block_iomem;
682 struct lance_rx_desc __iomem *rd;
683 unsigned char bits;
684 int len, entry;
685 struct sk_buff *skb;
686
687 entry = lp->rx_new;
688 for (rd = &ib->brx_ring [entry];
689 !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
690 rd = &ib->brx_ring [entry]) {
691
692 /* We got an incomplete frame? */
693 if ((bits & LE_R1_POK) != LE_R1_POK) {
09f75cd7
JG		 694 dev->stats.rx_over_errors++;
695 dev->stats.rx_errors++;
1da177e4
LT		 696 } else if (bits & LE_R1_ERR) {
697 /* Count only the end frame as a rx error,
698 * not the beginning
699 */
09f75cd7
JG		 700 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
701 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
702 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
703 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
704 if (bits & LE_R1_EOP) dev->stats.rx_errors++;
1da177e4
LT		 705 } else {
706 len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
707 skb = dev_alloc_skb(len + 2);
708
709 if (skb == NULL) {
710 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
711 dev->name);
09f75cd7 712 dev->stats.rx_dropped++;
1da177e4
LT		 713 sbus_writew(0, &rd->mblength);
714 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
715 lp->rx_new = RX_NEXT(entry);
716 return;
717 }
6aa20a22 718
09f75cd7 719 dev->stats.rx_bytes += len;
1da177e4 720
1da177e4
LT		 721 skb_reserve (skb, 2); /* 16 byte align */
722 skb_put(skb, len); /* make room */
723 lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
724 skb->protocol = eth_type_trans(skb, dev);
725 netif_rx(skb);
726 dev->last_rx = jiffies;
09f75cd7 727 dev->stats.rx_packets++;
1da177e4
LT		 728 }
729
730 /* Return the packet to the pool */
731 sbus_writew(0, &rd->mblength);
732 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
733 entry = RX_NEXT(entry);
734 }
735
736 lp->rx_new = entry;
737}
738
739static void lance_tx_pio(struct net_device *dev)
740{
741 struct lance_private *lp = netdev_priv(dev);
742 struct lance_init_block __iomem *ib = lp->init_block_iomem;
743 int i, j;
744
745 spin_lock(&lp->lock);
746
747 j = lp->tx_old;
748 for (i = j; i != lp->tx_new; i = j) {
749 struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
750 u8 bits = sbus_readb(&td->tmd1_bits);
751
752 /* If we hit a packet not owned by us, stop */
753 if (bits & LE_T1_OWN)
754 break;
6aa20a22 755
1da177e4
LT		 756 if (bits & LE_T1_ERR) {
757 u16 status = sbus_readw(&td->misc);
6aa20a22 758
09f75cd7
JG		 759 dev->stats.tx_errors++;
760 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
761 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
1da177e4
LT		 762
763 if (status & LE_T3_CLOS) {
09f75cd7 764 dev->stats.tx_carrier_errors++;
1da177e4
LT		 765 if (lp->auto_select) {
766 lp->tpe = 1 - lp->tpe;
767 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
768 dev->name, lp->tpe?"TPE":"AUI");
769 STOP_LANCE(lp);
770 lp->init_ring(dev);
771 load_csrs(lp);
772 init_restart_lance(lp);
773 goto out;
774 }
775 }
776
777 /* Buffer errors and underflows turn off the
778 * transmitter, restart the adapter.
779 */
780 if (status & (LE_T3_BUF|LE_T3_UFL)) {
09f75cd7 781 dev->stats.tx_fifo_errors++;
1da177e4
LT		 782
783 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
784 dev->name);
785 STOP_LANCE(lp);
786 lp->init_ring(dev);
787 load_csrs(lp);
788 init_restart_lance(lp);
789 goto out;
790 }
791 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
792 /*
793 * So we don't count the packet more than once.
794 */
795 sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
796
797 /* One collision before packet was sent. */
798 if (bits & LE_T1_EONE)
09f75cd7 799 dev->stats.collisions++;
1da177e4
LT		 800
801 /* More than one collision, be optimistic. */
802 if (bits & LE_T1_EMORE)
09f75cd7 803 dev->stats.collisions += 2;
1da177e4 804
09f75cd7 805 dev->stats.tx_packets++;
1da177e4 806 }
6aa20a22 807
1da177e4
LT		 808 j = TX_NEXT(j);
809 }
810 lp->tx_old = j;
811
812 if (netif_queue_stopped(dev) &&
813 TX_BUFFS_AVAIL > 0)
814 netif_wake_queue(dev);
815out:
816 spin_unlock(&lp->lock);
817}
818
7d12e780 819static irqreturn_t lance_interrupt(int irq, void *dev_id)
1da177e4 820{
c31f28e7 821 struct net_device *dev = dev_id;
1da177e4
LT		 822 struct lance_private *lp = netdev_priv(dev);
823 int csr0;
6aa20a22 824
1da177e4
LT		 825 sbus_writew(LE_CSR0, lp->lregs + RAP);
826 csr0 = sbus_readw(lp->lregs + RDP);
827
828 /* Acknowledge all the interrupt sources ASAP */
829 sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
830 lp->lregs + RDP);
6aa20a22 831
1da177e4
LT		 832 if ((csr0 & LE_C0_ERR) != 0) {
833 /* Clear the error condition */
834 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
835 LE_C0_CERR | LE_C0_MERR),
836 lp->lregs + RDP);
837 }
6aa20a22 838
1da177e4
LT		 839 if (csr0 & LE_C0_RINT)
840 lp->rx(dev);
6aa20a22 841
1da177e4
LT		 842 if (csr0 & LE_C0_TINT)
843 lp->tx(dev);
6aa20a22 844
1da177e4 845 if (csr0 & LE_C0_BABL)
09f75cd7 846 dev->stats.tx_errors++;
1da177e4
LT		 847
848 if (csr0 & LE_C0_MISS)
09f75cd7 849 dev->stats.rx_errors++;
1da177e4
LT		 850
851 if (csr0 & LE_C0_MERR) {
852 if (lp->dregs) {
853 u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
854
855 printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
856 dev->name, csr0, addr & 0xffffff);
857 } else {
858 printk(KERN_ERR "%s: Memory error, status %04x\n",
859 dev->name, csr0);
860 }
861
862 sbus_writew(LE_C0_STOP, lp->lregs + RDP);
863
864 if (lp->dregs) {
865 u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
866
867 dma_csr |= DMA_FIFO_INV;
868 sbus_writel(dma_csr, lp->dregs + DMA_CSR);
869 }
870
871 lp->init_ring(dev);
872 load_csrs(lp);
873 init_restart_lance(lp);
874 netif_wake_queue(dev);
875 }
876
877 sbus_writew(LE_C0_INEA, lp->lregs + RDP);
878
879 return IRQ_HANDLED;
880}
881
882/* Build a fake network packet and send it to ourselves. */
883static void build_fake_packet(struct lance_private *lp)
884{
885 struct net_device *dev = lp->dev;
886 int i, entry;
887
888 entry = lp->tx_new & TX_RING_MOD_MASK;
889 if (lp->pio_buffer) {
890 struct lance_init_block __iomem *ib = lp->init_block_iomem;
891 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
892 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
893 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
894 sbus_writew(0, &packet[i]);
895 for (i = 0; i < 6; i++) {
896 sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
897 sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
898 }
899 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
900 sbus_writew(0, &ib->btx_ring[entry].misc);
901 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
902 } else {
903 struct lance_init_block *ib = lp->init_block_mem;
904 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
905 struct ethhdr *eth = (struct ethhdr *) packet;
906 memset(packet, 0, ETH_ZLEN);
907 for (i = 0; i < 6; i++) {
908 eth->h_dest[i] = dev->dev_addr[i];
909 eth->h_source[i] = dev->dev_addr[i];
910 }
911 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
912 ib->btx_ring[entry].misc = 0;
913 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
914 }
915 lp->tx_new = TX_NEXT(entry);
916}
917
1da177e4
LT		 918static int lance_open(struct net_device *dev)
919{
920 struct lance_private *lp = netdev_priv(dev);
921 int status = 0;
922
1da177e4
LT		 923 STOP_LANCE(lp);
924
1fb9df5d 925 if (request_irq(dev->irq, &lance_interrupt, IRQF_SHARED,
1da177e4 926 lancestr, (void *) dev)) {
c6387a48 927 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
1da177e4
LT		 928 return -EAGAIN;
929 }
930
931 /* On the 4m, setup the ledma to provide the upper bits for buffers */
932 if (lp->dregs) {
933 u32 regval = lp->init_block_dvma & 0xff000000;
934
935 sbus_writel(regval, lp->dregs + DMA_TEST);
936 }
937
938 /* Set mode and clear multicast filter only at device open,
939 * so that lance_init_ring() called at any error will not
940 * forget multicast filters.
941 *
942 * BTW it is common bug in all lance drivers! --ANK
943 */
944 if (lp->pio_buffer) {
945 struct lance_init_block __iomem *ib = lp->init_block_iomem;
946 sbus_writew(0, &ib->mode);
947 sbus_writel(0, &ib->filter[0]);
948 sbus_writel(0, &ib->filter[1]);
949 } else {
950 struct lance_init_block *ib = lp->init_block_mem;
951 ib->mode = 0;
952 ib->filter [0] = 0;
953 ib->filter [1] = 0;
954 }
955
956 lp->init_ring(dev);
957 load_csrs(lp);
958
959 netif_start_queue(dev);
960
961 status = init_restart_lance(lp);
962 if (!status && lp->auto_select) {
963 build_fake_packet(lp);
964 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
965 }
966
967 return status;
968}
969
970static int lance_close(struct net_device *dev)
971{
972 struct lance_private *lp = netdev_priv(dev);
973
974 netif_stop_queue(dev);
975 del_timer_sync(&lp->multicast_timer);
976
977 STOP_LANCE(lp);
978
979 free_irq(dev->irq, (void *) dev);
980 return 0;
981}
982
983static int lance_reset(struct net_device *dev)
984{
985 struct lance_private *lp = netdev_priv(dev);
986 int status;
6aa20a22 987
1da177e4
LT		 988 STOP_LANCE(lp);
989
990 /* On the 4m, reset the dma too */
991 if (lp->dregs) {
992 u32 csr, addr;
993
994 printk(KERN_ERR "resetting ledma\n");
995 csr = sbus_readl(lp->dregs + DMA_CSR);
996 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
997 udelay(200);
998 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
999
1000 addr = lp->init_block_dvma & 0xff000000;
1001 sbus_writel(addr, lp->dregs + DMA_TEST);
1002 }
1003 lp->init_ring(dev);
1004 load_csrs(lp);
1005 dev->trans_start = jiffies;
1006 status = init_restart_lance(lp);
1007 return status;
1008}
1009
1010static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1011{
1012 void __iomem *piobuf = dest;
1013 u32 *p32;
1014 u16 *p16;
1015 u8 *p8;
1016
1017 switch ((unsigned long)src & 0x3) {
1018 case 0:
1019 p32 = (u32 *) src;
1020 while (len >= 4) {
1021 sbus_writel(*p32, piobuf);
1022 p32++;
1023 piobuf += 4;
1024 len -= 4;
1025 }
1026 src = (char *) p32;
1027 break;
1028 case 1:
1029 case 3:
1030 p8 = (u8 *) src;
1031 while (len >= 4) {
1032 u32 val;
1033
1034 val = p8[0] << 24;
1035 val |= p8[1] << 16;
1036 val |= p8[2] << 8;
1037 val |= p8[3];
1038 sbus_writel(val, piobuf);
1039 p8 += 4;
1040 piobuf += 4;
1041 len -= 4;
1042 }
1043 src = (char *) p8;
1044 break;
1045 case 2:
1046 p16 = (u16 *) src;
1047 while (len >= 4) {
1048 u32 val = p16[0]<<16 | p16[1];
1049 sbus_writel(val, piobuf);
1050 p16 += 2;
1051 piobuf += 4;
1052 len -= 4;
1053 }
1054 src = (char *) p16;
1055 break;
1056 };
1057 if (len >= 2) {
1058 u16 val = src[0] << 8 | src[1];
1059 sbus_writew(val, piobuf);
1060 src += 2;
1061 piobuf += 2;
1062 len -= 2;
1063 }
1064 if (len >= 1)
1065 sbus_writeb(src[0], piobuf);
1066}
1067
1068static void lance_piozero(void __iomem *dest, int len)
1069{
1070 void __iomem *piobuf = dest;
1071
1072 if ((unsigned long)piobuf & 1) {
1073 sbus_writeb(0, piobuf);
1074 piobuf += 1;
1075 len -= 1;
1076 if (len == 0)
1077 return;
1078 }
1079 if (len == 1) {
1080 sbus_writeb(0, piobuf);
1081 return;
1082 }
1083 if ((unsigned long)piobuf & 2) {
1084 sbus_writew(0, piobuf);
1085 piobuf += 2;
1086 len -= 2;
1087 if (len == 0)
1088 return;
1089 }
1090 while (len >= 4) {
1091 sbus_writel(0, piobuf);
1092 piobuf += 4;
1093 len -= 4;
1094 }
1095 if (len >= 2) {
1096 sbus_writew(0, piobuf);
1097 piobuf += 2;
1098 len -= 2;
1099 }
1100 if (len >= 1)
1101 sbus_writeb(0, piobuf);
1102}
1103
1104static void lance_tx_timeout(struct net_device *dev)
1105{
1106 struct lance_private *lp = netdev_priv(dev);
1107
1108 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1109 dev->name, sbus_readw(lp->lregs + RDP));
1110 lance_reset(dev);
1111 netif_wake_queue(dev);
1112}
1113
1114static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1115{
1116 struct lance_private *lp = netdev_priv(dev);
1117 int entry, skblen, len;
1118
1119 skblen = skb->len;
1120
1121 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1122
1123 spin_lock_irq(&lp->lock);
1124
09f75cd7 1125 dev->stats.tx_bytes += len;
1da177e4
LT		 1126
1127 entry = lp->tx_new & TX_RING_MOD_MASK;
1128 if (lp->pio_buffer) {
1129 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1130 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1131 sbus_writew(0, &ib->btx_ring[entry].misc);
1132 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1133 if (len != skblen)
1134 lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1135 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1136 } else {
1137 struct lance_init_block *ib = lp->init_block_mem;
1138 ib->btx_ring [entry].length = (-len) | 0xf000;
1139 ib->btx_ring [entry].misc = 0;
d626f62b 1140 skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1da177e4
LT		 1141 if (len != skblen)
1142 memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1143 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1144 }
1145
1146 lp->tx_new = TX_NEXT(entry);
1147
1148 if (TX_BUFFS_AVAIL <= 0)
1149 netif_stop_queue(dev);
1150
1151 /* Kick the lance: transmit now */
1152 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1153
1154 /* Read back CSR to invalidate the E-Cache.
1155 * This is needed, because DMA_DSBL_WR_INV is set.
1156 */
1157 if (lp->dregs)
1158 sbus_readw(lp->lregs + RDP);
1159
1160 spin_unlock_irq(&lp->lock);
1161
1162 dev->trans_start = jiffies;
1163 dev_kfree_skb(skb);
6aa20a22 1164
1da177e4
LT		 1165 return 0;
1166}
1167
1da177e4
LT		 1168/* taken from the depca driver */
1169static void lance_load_multicast(struct net_device *dev)
1170{
1171 struct lance_private *lp = netdev_priv(dev);
1172 struct dev_mc_list *dmi = dev->mc_list;
1173 char *addrs;
1174 int i;
1175 u32 crc;
1176 u32 val;
6aa20a22 1177
1da177e4
LT		 1178 /* set all multicast bits */
1179 if (dev->flags & IFF_ALLMULTI)
1180 val = ~0;
1181 else
1182 val = 0;
1183
1184 if (lp->pio_buffer) {
1185 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1186 sbus_writel(val, &ib->filter[0]);
1187 sbus_writel(val, &ib->filter[1]);
1188 } else {
1189 struct lance_init_block *ib = lp->init_block_mem;
1190 ib->filter [0] = val;
1191 ib->filter [1] = val;
1192 }
1193
1194 if (dev->flags & IFF_ALLMULTI)
1195 return;
6aa20a22 1196
1da177e4
LT		 1197 /* Add addresses */
1198 for (i = 0; i < dev->mc_count; i++) {
1199 addrs = dmi->dmi_addr;
1200 dmi = dmi->next;
1201
1202 /* multicast address? */
1203 if (!(*addrs & 1))
1204 continue;
1205 crc = ether_crc_le(6, addrs);
1206 crc = crc >> 26;
1207 if (lp->pio_buffer) {
1208 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1209 u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1210 u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1211 tmp |= 1 << (crc & 0xf);
1212 sbus_writew(tmp, &mcast_table[crc>>4]);
1213 } else {
1214 struct lance_init_block *ib = lp->init_block_mem;
1215 u16 *mcast_table = (u16 *) &ib->filter;
1216 mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1217 }
1218 }
1219}
1220
1221static void lance_set_multicast(struct net_device *dev)
1222{
1223 struct lance_private *lp = netdev_priv(dev);
1224 struct lance_init_block *ib_mem = lp->init_block_mem;
1225 struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1226 u16 mode;
1227
1228 if (!netif_running(dev))
1229 return;
1230
1231 if (lp->tx_old != lp->tx_new) {
1232 mod_timer(&lp->multicast_timer, jiffies + 4);
1233 netif_wake_queue(dev);
1234 return;
1235 }
1236
1237 netif_stop_queue(dev);
1238
1239 STOP_LANCE(lp);
1240 lp->init_ring(dev);
1241
1242 if (lp->pio_buffer)
1243 mode = sbus_readw(&ib_iomem->mode);
1244 else
1245 mode = ib_mem->mode;
1246 if (dev->flags & IFF_PROMISC) {
1247 mode |= LE_MO_PROM;
1248 if (lp->pio_buffer)
1249 sbus_writew(mode, &ib_iomem->mode);
1250 else
1251 ib_mem->mode = mode;
1252 } else {
1253 mode &= ~LE_MO_PROM;
1254 if (lp->pio_buffer)
1255 sbus_writew(mode, &ib_iomem->mode);
1256 else
1257 ib_mem->mode = mode;
1258 lance_load_multicast(dev);
1259 }
1260 load_csrs(lp);
1261 init_restart_lance(lp);
1262 netif_wake_queue(dev);
1263}
1264
1265static void lance_set_multicast_retry(unsigned long _opaque)
1266{
1267 struct net_device *dev = (struct net_device *) _opaque;
1268
1269 lance_set_multicast(dev);
1270}
1271
1272static void lance_free_hwresources(struct lance_private *lp)
1273{
1274 if (lp->lregs)
1275 sbus_iounmap(lp->lregs, LANCE_REG_SIZE);
1276 if (lp->init_block_iomem) {
1277 sbus_iounmap(lp->init_block_iomem,
1278 sizeof(struct lance_init_block));
1279 } else if (lp->init_block_mem) {
1280 sbus_free_consistent(lp->sdev,
1281 sizeof(struct lance_init_block),
1282 lp->init_block_mem,
1283 lp->init_block_dvma);
1284 }
1285}
1286
1287/* Ethtool support... */
1288static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1289{
1290 struct lance_private *lp = netdev_priv(dev);
1291
1292 strcpy(info->driver, "sunlance");
1293 strcpy(info->version, "2.02");
1294 sprintf(info->bus_info, "SBUS:%d",
1295 lp->sdev->slot);
1296}
1297
1298static u32 sparc_lance_get_link(struct net_device *dev)
1299{
1300 /* We really do not keep track of this, but this
1301 * is better than not reporting anything at all.
1302 */
1303 return 1;
1304}
1305
7282d491 1306static const struct ethtool_ops sparc_lance_ethtool_ops = {
1da177e4
LT		 1307 .get_drvinfo = sparc_lance_get_drvinfo,
1308 .get_link = sparc_lance_get_link,
1309};
1310
efdbc1a7
DM		 1311static int __devinit sparc_lance_probe_one(struct sbus_dev *sdev,
1312 struct sbus_dma *ledma,
1313 struct sbus_dev *lebuffer)
1da177e4
LT		 1314{
1315 static unsigned version_printed;
76fcdb30 1316 struct device_node *dp = sdev->ofdev.node;
1da177e4
LT		 1317 struct net_device *dev;
1318 struct lance_private *lp;
1319 int i;
0795af57 1320 DECLARE_MAC_BUF(mac);
1da177e4
LT		 1321
1322 dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1323 if (!dev)
1324 return -ENOMEM;
1325
1326 lp = netdev_priv(dev);
1da177e4
LT		 1327
1328 if (sparc_lance_debug && version_printed++ == 0)
1329 printk (KERN_INFO "%s", version);
1330
1331 spin_lock_init(&lp->lock);
1332
1333 /* Copy the IDPROM ethernet address to the device structure, later we
1334 * will copy the address in the device structure to the lance
1335 * initialization block.
1336 */
1337 for (i = 0; i < 6; i++)
1338 dev->dev_addr[i] = idprom->id_ethaddr[i];
1339
1340 /* Get the IO region */
1341 lp->lregs = sbus_ioremap(&sdev->resource[0], 0,
1342 LANCE_REG_SIZE, lancestr);
1343 if (!lp->lregs) {
1344 printk(KERN_ERR "SunLance: Cannot map registers.\n");
1345 goto fail;
1346 }
1347
1348 lp->sdev = sdev;
1349 if (lebuffer) {
1350 /* sanity check */
1351 if (lebuffer->resource[0].start & 7) {
1352 printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1353 goto fail;
1354 }
1355 lp->init_block_iomem =
1356 sbus_ioremap(&lebuffer->resource[0], 0,
1357 sizeof(struct lance_init_block), "lebuffer");
1358 if (!lp->init_block_iomem) {
1359 printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1360 goto fail;
1361 }
1362 lp->init_block_dvma = 0;
1363 lp->pio_buffer = 1;
1364 lp->init_ring = lance_init_ring_pio;
1365 lp->rx = lance_rx_pio;
1366 lp->tx = lance_tx_pio;
1367 } else {
1368 lp->init_block_mem =
1369 sbus_alloc_consistent(sdev, sizeof(struct lance_init_block),
1370 &lp->init_block_dvma);
1371 if (!lp->init_block_mem || lp->init_block_dvma == 0) {
1372 printk(KERN_ERR "SunLance: Cannot allocate consistent DMA memory.\n");
1373 goto fail;
1374 }
1375 lp->pio_buffer = 0;
1376 lp->init_ring = lance_init_ring_dvma;
1377 lp->rx = lance_rx_dvma;
1378 lp->tx = lance_tx_dvma;
1379 }
76fcdb30
DM		 1380 lp->busmaster_regval = of_getintprop_default(dp, "busmaster-regval",
1381 (LE_C3_BSWP |
1382 LE_C3_ACON |
1383 LE_C3_BCON));
1da177e4
LT		 1384
1385 lp->name = lancestr;
1386 lp->ledma = ledma;
1387
1388 lp->burst_sizes = 0;
1389 if (lp->ledma) {
76fcdb30
DM		 1390 struct device_node *ledma_dp = ledma->sdev->ofdev.node;
1391 const char *prop;
1da177e4
LT		 1392 unsigned int sbmask;
1393 u32 csr;
1394
1395 /* Find burst-size property for ledma */
76fcdb30
DM		 1396 lp->burst_sizes = of_getintprop_default(ledma_dp,
1397 "burst-sizes", 0);
1da177e4
LT		 1398
1399 /* ledma may be capable of fast bursts, but sbus may not. */
76fcdb30
DM		 1400 sbmask = of_getintprop_default(ledma_dp, "burst-sizes",
1401 DMA_BURSTBITS);
1da177e4
LT		 1402 lp->burst_sizes &= sbmask;
1403
1404 /* Get the cable-selection property */
76fcdb30
DM		 1405 prop = of_get_property(ledma_dp, "cable-selection", NULL);
1406 if (!prop || prop[0] == '\0') {
1407 struct device_node *nd;
1da177e4 1408
76fcdb30
DM		 1409 printk(KERN_INFO "SunLance: using "
1410 "auto-carrier-detection.\n");
1da177e4 1411
76fcdb30 1412 nd = of_find_node_by_path("/options");
1da177e4
LT		 1413 if (!nd)
1414 goto no_link_test;
1415
76fcdb30
DM		 1416 prop = of_get_property(nd, "tpe-link-test?", NULL);
1417 if (!prop)
1da177e4
LT		 1418 goto no_link_test;
1419
1da177e4
LT		 1420 if (strcmp(prop, "true")) {
1421 printk(KERN_NOTICE "SunLance: warning: overriding option "
1422 "'tpe-link-test?'\n");
1423 printk(KERN_NOTICE "SunLance: warning: mail any problems "
1424 "to ecd@skynet.be\n");
1425 auxio_set_lte(AUXIO_LTE_ON);
1426 }
1427no_link_test:
1428 lp->auto_select = 1;
1429 lp->tpe = 0;
1430 } else if (!strcmp(prop, "aui")) {
1431 lp->auto_select = 0;
1432 lp->tpe = 0;
1433 } else {
1434 lp->auto_select = 0;
1435 lp->tpe = 1;
1436 }
1437
1438 lp->dregs = ledma->regs;
1439
1440 /* Reset ledma */
1441 csr = sbus_readl(lp->dregs + DMA_CSR);
1442 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1443 udelay(200);
1444 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1445 } else
1446 lp->dregs = NULL;
1447
1448 lp->dev = dev;
c2d81e63 1449 SET_NETDEV_DEV(dev, &sdev->ofdev.dev);
1da177e4
LT		 1450 dev->open = &lance_open;
1451 dev->stop = &lance_close;
1452 dev->hard_start_xmit = &lance_start_xmit;
1453 dev->tx_timeout = &lance_tx_timeout;
1454 dev->watchdog_timeo = 5*HZ;
1da177e4
LT		 1455 dev->set_multicast_list = &lance_set_multicast;
1456 dev->ethtool_ops = &sparc_lance_ethtool_ops;
1457
1458 dev->irq = sdev->irqs[0];
1459
1460 dev->dma = 0;
1461
1462 /* We cannot sleep if the chip is busy during a
1463 * multicast list update event, because such events
1464 * can occur from interrupts (ex. IPv6). So we
1465 * use a timer to try again later when necessary. -DaveM
1466 */
1467 init_timer(&lp->multicast_timer);
1468 lp->multicast_timer.data = (unsigned long) dev;
1469 lp->multicast_timer.function = &lance_set_multicast_retry;
1470
1471 if (register_netdev(dev)) {
1472 printk(KERN_ERR "SunLance: Cannot register device.\n");
1473 goto fail;
1474 }
1475
c2d81e63 1476 dev_set_drvdata(&sdev->ofdev.dev, lp);
1da177e4 1477
0795af57
JP		 1478 printk(KERN_INFO "%s: LANCE %s\n",
1479 dev->name, print_mac(mac, dev->dev_addr));
1da177e4
LT		 1480
1481 return 0;
1482
1483fail:
1484 lance_free_hwresources(lp);
1485 free_netdev(dev);
1486 return -ENODEV;
1487}
1488
1489/* On 4m, find the associated dma for the lance chip */
efdbc1a7 1490static struct sbus_dma * __devinit find_ledma(struct sbus_dev *sdev)
1da177e4
LT		 1491{
1492 struct sbus_dma *p;
1493
1494 for_each_dvma(p) {
1495 if (p->sdev == sdev)
1496 return p;
1497 }
1498 return NULL;
1499}
1500
1501#ifdef CONFIG_SUN4
1502
1503#include <asm/sun4paddr.h>
1504#include <asm/machines.h>
1505
1506/* Find all the lance cards on the system and initialize them */
c2d81e63 1507static struct sbus_dev sun4_sdev;
efdbc1a7 1508static int __devinit sparc_lance_init(void)
1da177e4 1509{
1da177e4
LT		 1510 if ((idprom->id_machtype == (SM_SUN4|SM_4_330)) ||
1511 (idprom->id_machtype == (SM_SUN4|SM_4_470))) {
93853fd0 1512 memset(&sun4_sdev, 0, sizeof(struct sbus_dev));
c2d81e63
DM		 1513 sun4_sdev.reg_addrs[0].phys_addr = sun4_eth_physaddr;
1514 sun4_sdev.irqs[0] = 6;
1515 return sparc_lance_probe_one(&sun4_sdev, NULL, NULL);
1da177e4
LT		 1516 }
1517 return -ENODEV;
1518}
1519
c2d81e63 1520static int __exit sunlance_sun4_remove(void)
1da177e4 1521{
93853fd0 1522 struct lance_private *lp = dev_get_drvdata(&sun4_sdev.ofdev.dev);
c2d81e63
DM		 1523 struct net_device *net_dev = lp->dev;
1524
9f9b6693 1525 unregister_netdev(net_dev);
c2d81e63 1526
93853fd0 1527 lance_free_hwresources(lp);
c2d81e63
DM		 1528
1529 free_netdev(net_dev);
1530
93853fd0 1531 dev_set_drvdata(&sun4_sdev.ofdev.dev, NULL);
c2d81e63 1532
1da177e4
LT		 1533 return 0;
1534}
1da177e4 1535
c2d81e63
DM		 1536#else /* !CONFIG_SUN4 */
1537
1538static int __devinit sunlance_sbus_probe(struct of_device *dev, const struct of_device_id *match)
1da177e4 1539{
c2d81e63 1540 struct sbus_dev *sdev = to_sbus_device(&dev->dev);
c2d81e63
DM		 1541 int err;
1542
404dda85
KH		 1543 if (sdev->parent) {
1544 struct of_device *parent = &sdev->parent->ofdev;
1da177e4 1545
404dda85
KH		 1546 if (!strcmp(parent->node->name, "ledma")) {
1547 struct sbus_dma *ledma = find_ledma(to_sbus_device(&parent->dev));
1da177e4 1548
404dda85
KH		 1549 err = sparc_lance_probe_one(sdev, ledma, NULL);
1550 } else if (!strcmp(parent->node->name, "lebuffer")) {
1551 err = sparc_lance_probe_one(sdev, NULL, to_sbus_device(&parent->dev));
1552 } else
1553 err = sparc_lance_probe_one(sdev, NULL, NULL);
1554 } else
1555 err = sparc_lance_probe_one(sdev, NULL, NULL);
c2d81e63
DM		 1556
1557 return err;
1558}
1559
1560static int __devexit sunlance_sbus_remove(struct of_device *dev)
1561{
1562 struct lance_private *lp = dev_get_drvdata(&dev->dev);
1563 struct net_device *net_dev = lp->dev;
1564
9f9b6693 1565 unregister_netdev(net_dev);
c2d81e63
DM		 1566
1567 lance_free_hwresources(lp);
1568
1569 free_netdev(net_dev);
1570
1571 dev_set_drvdata(&dev->dev, NULL);
1572
1573 return 0;
1574}
1575
1576static struct of_device_id sunlance_sbus_match[] = {
1577 {
1578 .name = "le",
1579 },
c2d81e63
DM		 1580 {},
1581};
1582
1583MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1584
1585static struct of_platform_driver sunlance_sbus_driver = {
1586 .name = "sunlance",
1587 .match_table = sunlance_sbus_match,
1588 .probe = sunlance_sbus_probe,
1589 .remove = __devexit_p(sunlance_sbus_remove),
1590};
1591
1592
1593/* Find all the lance cards on the system and initialize them */
1594static int __init sparc_lance_init(void)
1595{
1596 return of_register_driver(&sunlance_sbus_driver, &sbus_bus_type);
1597}
1598#endif /* !CONFIG_SUN4 */
1599
1600static void __exit sparc_lance_exit(void)
1601{
1602#ifdef CONFIG_SUN4
1603 sunlance_sun4_remove();
1604#else
1605 of_unregister_driver(&sunlance_sbus_driver);
1606#endif
1da177e4
LT		 1607}
1608
c2d81e63
DM		 1609module_init(sparc_lance_init);
1610module_exit(sparc_lance_exit);
Linux kernel - Deliverables
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