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[ARM] 3674/1: ep93xx: add cirrus logic edb9302 support
[linux-2.6/x86.git] / drivers / net / sunlance.c
blob2c239ab63a80e1877df202cb88fd8116a2bd9d87
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/config.h>
75 #include <linux/module.h>
76 #include <linux/kernel.h>
77 #include <linux/types.h>
78 #include <linux/fcntl.h>
79 #include <linux/interrupt.h>
80 #include <linux/ioport.h>
81 #include <linux/in.h>
82 #include <linux/slab.h>
83 #include <linux/string.h>
84 #include <linux/delay.h>
85 #include <linux/init.h>
86 #include <linux/crc32.h>
87 #include <linux/errno.h>
88 #include <linux/socket.h> /* Used for the temporal inet entries and routing */
89 #include <linux/route.h>
90 #include <linux/netdevice.h>
91 #include <linux/etherdevice.h>
92 #include <linux/skbuff.h>
93 #include <linux/ethtool.h>
94 #include <linux/bitops.h>
95
96 #include <asm/system.h>
97 #include <asm/io.h>
98 #include <asm/dma.h>
99 #include <asm/pgtable.h>
100 #include <asm/byteorder.h> /* Used by the checksum routines */
101 #include <asm/idprom.h>
102 #include <asm/sbus.h>
103 #include <asm/openprom.h>
104 #include <asm/oplib.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 net_device_stats stats;
254 struct sbus_dma *ledma; /* If set this points to ledma */
255 char tpe; /* cable-selection is TPE */
256 char auto_select; /* cable-selection by carrier */
257 char burst_sizes; /* ledma SBus burst sizes */
258 char pio_buffer; /* init block in PIO space? */
259
260 unsigned short busmaster_regval;
261
262 void (*init_ring)(struct net_device *);
263 void (*rx)(struct net_device *);
264 void (*tx)(struct net_device *);
265
266 char *name;
267 dma_addr_t init_block_dvma;
268 struct net_device *dev; /* Backpointer */
269 struct sbus_dev *sdev;
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 lp->stats.rx_over_errors++;
525 lp->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) lp->stats.rx_fifo_errors++;
531 if (bits & LE_R1_CRC) lp->stats.rx_crc_errors++;
532 if (bits & LE_R1_OFL) lp->stats.rx_over_errors++;
533 if (bits & LE_R1_FRA) lp->stats.rx_frame_errors++;
534 if (bits & LE_R1_EOP) lp->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 lp->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 lp->stats.rx_bytes += len;
550
551 skb->dev = dev;
552 skb_reserve(skb, 2); /* 16 byte align */
553 skb_put(skb, len); /* make room */
554 eth_copy_and_sum(skb,
555 (unsigned char *)&(ib->rx_buf [entry][0]),
556 len, 0);
557 skb->protocol = eth_type_trans(skb, dev);
558 netif_rx(skb);
559 dev->last_rx = jiffies;
560 lp->stats.rx_packets++;
561 }
562
563 /* Return the packet to the pool */
564 rd->mblength = 0;
565 rd->rmd1_bits = LE_R1_OWN;
566 entry = RX_NEXT(entry);
567 }
568
569 lp->rx_new = entry;
570 }
571
572 static void lance_tx_dvma(struct net_device *dev)
573 {
574 struct lance_private *lp = netdev_priv(dev);
575 struct lance_init_block *ib = lp->init_block_mem;
576 int i, j;
577
578 spin_lock(&lp->lock);
579
580 j = lp->tx_old;
581 for (i = j; i != lp->tx_new; i = j) {
582 struct lance_tx_desc *td = &ib->btx_ring [i];
583 u8 bits = td->tmd1_bits;
584
585 /* If we hit a packet not owned by us, stop */
586 if (bits & LE_T1_OWN)
587 break;
588
589 if (bits & LE_T1_ERR) {
590 u16 status = td->misc;
591
592 lp->stats.tx_errors++;
593 if (status & LE_T3_RTY) lp->stats.tx_aborted_errors++;
594 if (status & LE_T3_LCOL) lp->stats.tx_window_errors++;
595
596 if (status & LE_T3_CLOS) {
597 lp->stats.tx_carrier_errors++;
598 if (lp->auto_select) {
599 lp->tpe = 1 - lp->tpe;
600 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
601 dev->name, lp->tpe?"TPE":"AUI");
602 STOP_LANCE(lp);
603 lp->init_ring(dev);
604 load_csrs(lp);
605 init_restart_lance(lp);
606 goto out;
607 }
608 }
609
610 /* Buffer errors and underflows turn off the
611 * transmitter, restart the adapter.
612 */
613 if (status & (LE_T3_BUF|LE_T3_UFL)) {
614 lp->stats.tx_fifo_errors++;
615
616 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
617 dev->name);
618 STOP_LANCE(lp);
619 lp->init_ring(dev);
620 load_csrs(lp);
621 init_restart_lance(lp);
622 goto out;
623 }
624 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
625 /*
626 * So we don't count the packet more than once.
627 */
628 td->tmd1_bits = bits & ~(LE_T1_POK);
629
630 /* One collision before packet was sent. */
631 if (bits & LE_T1_EONE)
632 lp->stats.collisions++;
633
634 /* More than one collision, be optimistic. */
635 if (bits & LE_T1_EMORE)
636 lp->stats.collisions += 2;
637
638 lp->stats.tx_packets++;
639 }
640
641 j = TX_NEXT(j);
642 }
643 lp->tx_old = j;
644 out:
645 if (netif_queue_stopped(dev) &&
646 TX_BUFFS_AVAIL > 0)
647 netif_wake_queue(dev);
648
649 spin_unlock(&lp->lock);
650 }
651
652 static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
653 {
654 u16 *p16 = (u16 *) skb->data;
655 u32 *p32;
656 u8 *p8;
657 void __iomem *pbuf = piobuf;
658
659 /* We know here that both src and dest are on a 16bit boundary. */
660 *p16++ = sbus_readw(pbuf);
661 p32 = (u32 *) p16;
662 pbuf += 2;
663 len -= 2;
664
665 while (len >= 4) {
666 *p32++ = sbus_readl(pbuf);
667 pbuf += 4;
668 len -= 4;
669 }
670 p8 = (u8 *) p32;
671 if (len >= 2) {
672 p16 = (u16 *) p32;
673 *p16++ = sbus_readw(pbuf);
674 pbuf += 2;
675 len -= 2;
676 p8 = (u8 *) p16;
677 }
678 if (len >= 1)
679 *p8 = sbus_readb(pbuf);
680 }
681
682 static void lance_rx_pio(struct net_device *dev)
683 {
684 struct lance_private *lp = netdev_priv(dev);
685 struct lance_init_block __iomem *ib = lp->init_block_iomem;
686 struct lance_rx_desc __iomem *rd;
687 unsigned char bits;
688 int len, entry;
689 struct sk_buff *skb;
690
691 entry = lp->rx_new;
692 for (rd = &ib->brx_ring [entry];
693 !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
694 rd = &ib->brx_ring [entry]) {
695
696 /* We got an incomplete frame? */
697 if ((bits & LE_R1_POK) != LE_R1_POK) {
698 lp->stats.rx_over_errors++;
699 lp->stats.rx_errors++;
700 } else if (bits & LE_R1_ERR) {
701 /* Count only the end frame as a rx error,
702 * not the beginning
703 */
704 if (bits & LE_R1_BUF) lp->stats.rx_fifo_errors++;
705 if (bits & LE_R1_CRC) lp->stats.rx_crc_errors++;
706 if (bits & LE_R1_OFL) lp->stats.rx_over_errors++;
707 if (bits & LE_R1_FRA) lp->stats.rx_frame_errors++;
708 if (bits & LE_R1_EOP) lp->stats.rx_errors++;
709 } else {
710 len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
711 skb = dev_alloc_skb(len + 2);
712
713 if (skb == NULL) {
714 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
715 dev->name);
716 lp->stats.rx_dropped++;
717 sbus_writew(0, &rd->mblength);
718 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
719 lp->rx_new = RX_NEXT(entry);
720 return;
721 }
722
723 lp->stats.rx_bytes += len;
724
725 skb->dev = dev;
726 skb_reserve (skb, 2); /* 16 byte align */
727 skb_put(skb, len); /* make room */
728 lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
729 skb->protocol = eth_type_trans(skb, dev);
730 netif_rx(skb);
731 dev->last_rx = jiffies;
732 lp->stats.rx_packets++;
733 }
734
735 /* Return the packet to the pool */
736 sbus_writew(0, &rd->mblength);
737 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
738 entry = RX_NEXT(entry);
739 }
740
741 lp->rx_new = entry;
742 }
743
744 static void lance_tx_pio(struct net_device *dev)
745 {
746 struct lance_private *lp = netdev_priv(dev);
747 struct lance_init_block __iomem *ib = lp->init_block_iomem;
748 int i, j;
749
750 spin_lock(&lp->lock);
751
752 j = lp->tx_old;
753 for (i = j; i != lp->tx_new; i = j) {
754 struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
755 u8 bits = sbus_readb(&td->tmd1_bits);
756
757 /* If we hit a packet not owned by us, stop */
758 if (bits & LE_T1_OWN)
759 break;
760
761 if (bits & LE_T1_ERR) {
762 u16 status = sbus_readw(&td->misc);
763
764 lp->stats.tx_errors++;
765 if (status & LE_T3_RTY) lp->stats.tx_aborted_errors++;
766 if (status & LE_T3_LCOL) lp->stats.tx_window_errors++;
767
768 if (status & LE_T3_CLOS) {
769 lp->stats.tx_carrier_errors++;
770 if (lp->auto_select) {
771 lp->tpe = 1 - lp->tpe;
772 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
773 dev->name, lp->tpe?"TPE":"AUI");
774 STOP_LANCE(lp);
775 lp->init_ring(dev);
776 load_csrs(lp);
777 init_restart_lance(lp);
778 goto out;
779 }
780 }
781
782 /* Buffer errors and underflows turn off the
783 * transmitter, restart the adapter.
784 */
785 if (status & (LE_T3_BUF|LE_T3_UFL)) {
786 lp->stats.tx_fifo_errors++;
787
788 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
789 dev->name);
790 STOP_LANCE(lp);
791 lp->init_ring(dev);
792 load_csrs(lp);
793 init_restart_lance(lp);
794 goto out;
795 }
796 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
797 /*
798 * So we don't count the packet more than once.
799 */
800 sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
801
802 /* One collision before packet was sent. */
803 if (bits & LE_T1_EONE)
804 lp->stats.collisions++;
805
806 /* More than one collision, be optimistic. */
807 if (bits & LE_T1_EMORE)
808 lp->stats.collisions += 2;
809
810 lp->stats.tx_packets++;
811 }
812
813 j = TX_NEXT(j);
814 }
815 lp->tx_old = j;
816
817 if (netif_queue_stopped(dev) &&
818 TX_BUFFS_AVAIL > 0)
819 netif_wake_queue(dev);
820 out:
821 spin_unlock(&lp->lock);
822 }
823
824 static irqreturn_t lance_interrupt(int irq, void *dev_id, struct pt_regs *regs)
825 {
826 struct net_device *dev = (struct net_device *)dev_id;
827 struct lance_private *lp = netdev_priv(dev);
828 int csr0;
829
830 sbus_writew(LE_CSR0, lp->lregs + RAP);
831 csr0 = sbus_readw(lp->lregs + RDP);
832
833 /* Acknowledge all the interrupt sources ASAP */
834 sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
835 lp->lregs + RDP);
836
837 if ((csr0 & LE_C0_ERR) != 0) {
838 /* Clear the error condition */
839 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
840 LE_C0_CERR | LE_C0_MERR),
841 lp->lregs + RDP);
842 }
843
844 if (csr0 & LE_C0_RINT)
845 lp->rx(dev);
846
847 if (csr0 & LE_C0_TINT)
848 lp->tx(dev);
849
850 if (csr0 & LE_C0_BABL)
851 lp->stats.tx_errors++;
852
853 if (csr0 & LE_C0_MISS)
854 lp->stats.rx_errors++;
855
856 if (csr0 & LE_C0_MERR) {
857 if (lp->dregs) {
858 u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
859
860 printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
861 dev->name, csr0, addr & 0xffffff);
862 } else {
863 printk(KERN_ERR "%s: Memory error, status %04x\n",
864 dev->name, csr0);
865 }
866
867 sbus_writew(LE_C0_STOP, lp->lregs + RDP);
868
869 if (lp->dregs) {
870 u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
871
872 dma_csr |= DMA_FIFO_INV;
873 sbus_writel(dma_csr, lp->dregs + DMA_CSR);
874 }
875
876 lp->init_ring(dev);
877 load_csrs(lp);
878 init_restart_lance(lp);
879 netif_wake_queue(dev);
880 }
881
882 sbus_writew(LE_C0_INEA, lp->lregs + RDP);
883
884 return IRQ_HANDLED;
885 }
886
887 /* Build a fake network packet and send it to ourselves. */
888 static void build_fake_packet(struct lance_private *lp)
889 {
890 struct net_device *dev = lp->dev;
891 int i, entry;
892
893 entry = lp->tx_new & TX_RING_MOD_MASK;
894 if (lp->pio_buffer) {
895 struct lance_init_block __iomem *ib = lp->init_block_iomem;
896 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
897 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
898 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
899 sbus_writew(0, &packet[i]);
900 for (i = 0; i < 6; i++) {
901 sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
902 sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
903 }
904 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
905 sbus_writew(0, &ib->btx_ring[entry].misc);
906 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
907 } else {
908 struct lance_init_block *ib = lp->init_block_mem;
909 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
910 struct ethhdr *eth = (struct ethhdr *) packet;
911 memset(packet, 0, ETH_ZLEN);
912 for (i = 0; i < 6; i++) {
913 eth->h_dest[i] = dev->dev_addr[i];
914 eth->h_source[i] = dev->dev_addr[i];
915 }
916 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
917 ib->btx_ring[entry].misc = 0;
918 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
919 }
920 lp->tx_new = TX_NEXT(entry);
921 }
922
923 struct net_device *last_dev;
924
925 static int lance_open(struct net_device *dev)
926 {
927 struct lance_private *lp = netdev_priv(dev);
928 int status = 0;
929
930 last_dev = dev;
931
932 STOP_LANCE(lp);
933
934 if (request_irq(dev->irq, &lance_interrupt, SA_SHIRQ,
935 lancestr, (void *) dev)) {
936 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
937 return -EAGAIN;
938 }
939
940 /* On the 4m, setup the ledma to provide the upper bits for buffers */
941 if (lp->dregs) {
942 u32 regval = lp->init_block_dvma & 0xff000000;
943
944 sbus_writel(regval, lp->dregs + DMA_TEST);
945 }
946
947 /* Set mode and clear multicast filter only at device open,
948 * so that lance_init_ring() called at any error will not
949 * forget multicast filters.
950 *
951 * BTW it is common bug in all lance drivers! --ANK
952 */
953 if (lp->pio_buffer) {
954 struct lance_init_block __iomem *ib = lp->init_block_iomem;
955 sbus_writew(0, &ib->mode);
956 sbus_writel(0, &ib->filter[0]);
957 sbus_writel(0, &ib->filter[1]);
958 } else {
959 struct lance_init_block *ib = lp->init_block_mem;
960 ib->mode = 0;
961 ib->filter [0] = 0;
962 ib->filter [1] = 0;
963 }
964
965 lp->init_ring(dev);
966 load_csrs(lp);
967
968 netif_start_queue(dev);
969
970 status = init_restart_lance(lp);
971 if (!status && lp->auto_select) {
972 build_fake_packet(lp);
973 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
974 }
975
976 return status;
977 }
978
979 static int lance_close(struct net_device *dev)
980 {
981 struct lance_private *lp = netdev_priv(dev);
982
983 netif_stop_queue(dev);
984 del_timer_sync(&lp->multicast_timer);
985
986 STOP_LANCE(lp);
987
988 free_irq(dev->irq, (void *) dev);
989 return 0;
990 }
991
992 static int lance_reset(struct net_device *dev)
993 {
994 struct lance_private *lp = netdev_priv(dev);
995 int status;
996
997 STOP_LANCE(lp);
998
999 /* On the 4m, reset the dma too */
1000 if (lp->dregs) {
1001 u32 csr, addr;
1002
1003 printk(KERN_ERR "resetting ledma\n");
1004 csr = sbus_readl(lp->dregs + DMA_CSR);
1005 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1006 udelay(200);
1007 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1008
1009 addr = lp->init_block_dvma & 0xff000000;
1010 sbus_writel(addr, lp->dregs + DMA_TEST);
1011 }
1012 lp->init_ring(dev);
1013 load_csrs(lp);
1014 dev->trans_start = jiffies;
1015 status = init_restart_lance(lp);
1016 return status;
1017 }
1018
1019 static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1020 {
1021 void __iomem *piobuf = dest;
1022 u32 *p32;
1023 u16 *p16;
1024 u8 *p8;
1025
1026 switch ((unsigned long)src & 0x3) {
1027 case 0:
1028 p32 = (u32 *) src;
1029 while (len >= 4) {
1030 sbus_writel(*p32, piobuf);
1031 p32++;
1032 piobuf += 4;
1033 len -= 4;
1034 }
1035 src = (char *) p32;
1036 break;
1037 case 1:
1038 case 3:
1039 p8 = (u8 *) src;
1040 while (len >= 4) {
1041 u32 val;
1042
1043 val = p8[0] << 24;
1044 val |= p8[1] << 16;
1045 val |= p8[2] << 8;
1046 val |= p8[3];
1047 sbus_writel(val, piobuf);
1048 p8 += 4;
1049 piobuf += 4;
1050 len -= 4;
1051 }
1052 src = (char *) p8;
1053 break;
1054 case 2:
1055 p16 = (u16 *) src;
1056 while (len >= 4) {
1057 u32 val = p16[0]<<16 | p16[1];
1058 sbus_writel(val, piobuf);
1059 p16 += 2;
1060 piobuf += 4;
1061 len -= 4;
1062 }
1063 src = (char *) p16;
1064 break;
1065 };
1066 if (len >= 2) {
1067 u16 val = src[0] << 8 | src[1];
1068 sbus_writew(val, piobuf);
1069 src += 2;
1070 piobuf += 2;
1071 len -= 2;
1072 }
1073 if (len >= 1)
1074 sbus_writeb(src[0], piobuf);
1075 }
1076
1077 static void lance_piozero(void __iomem *dest, int len)
1078 {
1079 void __iomem *piobuf = dest;
1080
1081 if ((unsigned long)piobuf & 1) {
1082 sbus_writeb(0, piobuf);
1083 piobuf += 1;
1084 len -= 1;
1085 if (len == 0)
1086 return;
1087 }
1088 if (len == 1) {
1089 sbus_writeb(0, piobuf);
1090 return;
1091 }
1092 if ((unsigned long)piobuf & 2) {
1093 sbus_writew(0, piobuf);
1094 piobuf += 2;
1095 len -= 2;
1096 if (len == 0)
1097 return;
1098 }
1099 while (len >= 4) {
1100 sbus_writel(0, piobuf);
1101 piobuf += 4;
1102 len -= 4;
1103 }
1104 if (len >= 2) {
1105 sbus_writew(0, piobuf);
1106 piobuf += 2;
1107 len -= 2;
1108 }
1109 if (len >= 1)
1110 sbus_writeb(0, piobuf);
1111 }
1112
1113 static void lance_tx_timeout(struct net_device *dev)
1114 {
1115 struct lance_private *lp = netdev_priv(dev);
1116
1117 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1118 dev->name, sbus_readw(lp->lregs + RDP));
1119 lance_reset(dev);
1120 netif_wake_queue(dev);
1121 }
1122
1123 static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1124 {
1125 struct lance_private *lp = netdev_priv(dev);
1126 int entry, skblen, len;
1127
1128 skblen = skb->len;
1129
1130 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1131
1132 spin_lock_irq(&lp->lock);
1133
1134 lp->stats.tx_bytes += len;
1135
1136 entry = lp->tx_new & TX_RING_MOD_MASK;
1137 if (lp->pio_buffer) {
1138 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1139 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1140 sbus_writew(0, &ib->btx_ring[entry].misc);
1141 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1142 if (len != skblen)
1143 lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1144 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1145 } else {
1146 struct lance_init_block *ib = lp->init_block_mem;
1147 ib->btx_ring [entry].length = (-len) | 0xf000;
1148 ib->btx_ring [entry].misc = 0;
1149 memcpy((char *)&ib->tx_buf [entry][0], skb->data, skblen);
1150 if (len != skblen)
1151 memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1152 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1153 }
1154
1155 lp->tx_new = TX_NEXT(entry);
1156
1157 if (TX_BUFFS_AVAIL <= 0)
1158 netif_stop_queue(dev);
1159
1160 /* Kick the lance: transmit now */
1161 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1162
1163 /* Read back CSR to invalidate the E-Cache.
1164 * This is needed, because DMA_DSBL_WR_INV is set.
1165 */
1166 if (lp->dregs)
1167 sbus_readw(lp->lregs + RDP);
1168
1169 spin_unlock_irq(&lp->lock);
1170
1171 dev->trans_start = jiffies;
1172 dev_kfree_skb(skb);
1173
1174 return 0;
1175 }
1176
1177 static struct net_device_stats *lance_get_stats(struct net_device *dev)
1178 {
1179 struct lance_private *lp = netdev_priv(dev);
1180
1181 return &lp->stats;
1182 }
1183
1184 /* taken from the depca driver */
1185 static void lance_load_multicast(struct net_device *dev)
1186 {
1187 struct lance_private *lp = netdev_priv(dev);
1188 struct dev_mc_list *dmi = dev->mc_list;
1189 char *addrs;
1190 int i;
1191 u32 crc;
1192 u32 val;
1193
1194 /* set all multicast bits */
1195 if (dev->flags & IFF_ALLMULTI)
1196 val = ~0;
1197 else
1198 val = 0;
1199
1200 if (lp->pio_buffer) {
1201 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1202 sbus_writel(val, &ib->filter[0]);
1203 sbus_writel(val, &ib->filter[1]);
1204 } else {
1205 struct lance_init_block *ib = lp->init_block_mem;
1206 ib->filter [0] = val;
1207 ib->filter [1] = val;
1208 }
1209
1210 if (dev->flags & IFF_ALLMULTI)
1211 return;
1212
1213 /* Add addresses */
1214 for (i = 0; i < dev->mc_count; i++) {
1215 addrs = dmi->dmi_addr;
1216 dmi = dmi->next;
1217
1218 /* multicast address? */
1219 if (!(*addrs & 1))
1220 continue;
1221 crc = ether_crc_le(6, addrs);
1222 crc = crc >> 26;
1223 if (lp->pio_buffer) {
1224 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1225 u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1226 u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1227 tmp |= 1 << (crc & 0xf);
1228 sbus_writew(tmp, &mcast_table[crc>>4]);
1229 } else {
1230 struct lance_init_block *ib = lp->init_block_mem;
1231 u16 *mcast_table = (u16 *) &ib->filter;
1232 mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1233 }
1234 }
1235 }
1236
1237 static void lance_set_multicast(struct net_device *dev)
1238 {
1239 struct lance_private *lp = netdev_priv(dev);
1240 struct lance_init_block *ib_mem = lp->init_block_mem;
1241 struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1242 u16 mode;
1243
1244 if (!netif_running(dev))
1245 return;
1246
1247 if (lp->tx_old != lp->tx_new) {
1248 mod_timer(&lp->multicast_timer, jiffies + 4);
1249 netif_wake_queue(dev);
1250 return;
1251 }
1252
1253 netif_stop_queue(dev);
1254
1255 STOP_LANCE(lp);
1256 lp->init_ring(dev);
1257
1258 if (lp->pio_buffer)
1259 mode = sbus_readw(&ib_iomem->mode);
1260 else
1261 mode = ib_mem->mode;
1262 if (dev->flags & IFF_PROMISC) {
1263 mode |= LE_MO_PROM;
1264 if (lp->pio_buffer)
1265 sbus_writew(mode, &ib_iomem->mode);
1266 else
1267 ib_mem->mode = mode;
1268 } else {
1269 mode &= ~LE_MO_PROM;
1270 if (lp->pio_buffer)
1271 sbus_writew(mode, &ib_iomem->mode);
1272 else
1273 ib_mem->mode = mode;
1274 lance_load_multicast(dev);
1275 }
1276 load_csrs(lp);
1277 init_restart_lance(lp);
1278 netif_wake_queue(dev);
1279 }
1280
1281 static void lance_set_multicast_retry(unsigned long _opaque)
1282 {
1283 struct net_device *dev = (struct net_device *) _opaque;
1284
1285 lance_set_multicast(dev);
1286 }
1287
1288 static void lance_free_hwresources(struct lance_private *lp)
1289 {
1290 if (lp->lregs)
1291 sbus_iounmap(lp->lregs, LANCE_REG_SIZE);
1292 if (lp->init_block_iomem) {
1293 sbus_iounmap(lp->init_block_iomem,
1294 sizeof(struct lance_init_block));
1295 } else if (lp->init_block_mem) {
1296 sbus_free_consistent(lp->sdev,
1297 sizeof(struct lance_init_block),
1298 lp->init_block_mem,
1299 lp->init_block_dvma);
1300 }
1301 }
1302
1303 /* Ethtool support... */
1304 static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1305 {
1306 struct lance_private *lp = netdev_priv(dev);
1307
1308 strcpy(info->driver, "sunlance");
1309 strcpy(info->version, "2.02");
1310 sprintf(info->bus_info, "SBUS:%d",
1311 lp->sdev->slot);
1312 }
1313
1314 static u32 sparc_lance_get_link(struct net_device *dev)
1315 {
1316 /* We really do not keep track of this, but this
1317 * is better than not reporting anything at all.
1318 */
1319 return 1;
1320 }
1321
1322 static struct ethtool_ops sparc_lance_ethtool_ops = {
1323 .get_drvinfo = sparc_lance_get_drvinfo,
1324 .get_link = sparc_lance_get_link,
1325 };
1326
1327 static int __init sparc_lance_probe_one(struct sbus_dev *sdev,
1328 struct sbus_dma *ledma,
1329 struct sbus_dev *lebuffer)
1330 {
1331 static unsigned version_printed;
1332 struct net_device *dev;
1333 struct lance_private *lp;
1334 int i;
1335
1336 dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1337 if (!dev)
1338 return -ENOMEM;
1339
1340 lp = netdev_priv(dev);
1341 memset(lp, 0, sizeof(*lp));
1342
1343 if (sparc_lance_debug && version_printed++ == 0)
1344 printk (KERN_INFO "%s", version);
1345
1346 spin_lock_init(&lp->lock);
1347
1348 /* Copy the IDPROM ethernet address to the device structure, later we
1349 * will copy the address in the device structure to the lance
1350 * initialization block.
1351 */
1352 for (i = 0; i < 6; i++)
1353 dev->dev_addr[i] = idprom->id_ethaddr[i];
1354
1355 /* Get the IO region */
1356 lp->lregs = sbus_ioremap(&sdev->resource[0], 0,
1357 LANCE_REG_SIZE, lancestr);
1358 if (!lp->lregs) {
1359 printk(KERN_ERR "SunLance: Cannot map registers.\n");
1360 goto fail;
1361 }
1362
1363 lp->sdev = sdev;
1364 if (lebuffer) {
1365 /* sanity check */
1366 if (lebuffer->resource[0].start & 7) {
1367 printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1368 goto fail;
1369 }
1370 lp->init_block_iomem =
1371 sbus_ioremap(&lebuffer->resource[0], 0,
1372 sizeof(struct lance_init_block), "lebuffer");
1373 if (!lp->init_block_iomem) {
1374 printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1375 goto fail;
1376 }
1377 lp->init_block_dvma = 0;
1378 lp->pio_buffer = 1;
1379 lp->init_ring = lance_init_ring_pio;
1380 lp->rx = lance_rx_pio;
1381 lp->tx = lance_tx_pio;
1382 } else {
1383 lp->init_block_mem =
1384 sbus_alloc_consistent(sdev, sizeof(struct lance_init_block),
1385 &lp->init_block_dvma);
1386 if (!lp->init_block_mem || lp->init_block_dvma == 0) {
1387 printk(KERN_ERR "SunLance: Cannot allocate consistent DMA memory.\n");
1388 goto fail;
1389 }
1390 lp->pio_buffer = 0;
1391 lp->init_ring = lance_init_ring_dvma;
1392 lp->rx = lance_rx_dvma;
1393 lp->tx = lance_tx_dvma;
1394 }
1395 lp->busmaster_regval = prom_getintdefault(sdev->prom_node,
1396 "busmaster-regval",
1397 (LE_C3_BSWP | LE_C3_ACON |
1398 LE_C3_BCON));
1399
1400 lp->name = lancestr;
1401 lp->ledma = ledma;
1402
1403 lp->burst_sizes = 0;
1404 if (lp->ledma) {
1405 char prop[6];
1406 unsigned int sbmask;
1407 u32 csr;
1408
1409 /* Find burst-size property for ledma */
1410 lp->burst_sizes = prom_getintdefault(ledma->sdev->prom_node,
1411 "burst-sizes", 0);
1412
1413 /* ledma may be capable of fast bursts, but sbus may not. */
1414 sbmask = prom_getintdefault(ledma->sdev->bus->prom_node,
1415 "burst-sizes", DMA_BURSTBITS);
1416 lp->burst_sizes &= sbmask;
1417
1418 /* Get the cable-selection property */
1419 memset(prop, 0, sizeof(prop));
1420 prom_getstring(ledma->sdev->prom_node, "cable-selection",
1421 prop, sizeof(prop));
1422 if (prop[0] == 0) {
1423 int topnd, nd;
1424
1425 printk(KERN_INFO "SunLance: using auto-carrier-detection.\n");
1426
1427 /* Is this found at /options .attributes in all
1428 * Prom versions? XXX
1429 */
1430 topnd = prom_getchild(prom_root_node);
1431
1432 nd = prom_searchsiblings(topnd, "options");
1433 if (!nd)
1434 goto no_link_test;
1435
1436 if (!prom_node_has_property(nd, "tpe-link-test?"))
1437 goto no_link_test;
1438
1439 memset(prop, 0, sizeof(prop));
1440 prom_getstring(nd, "tpe-link-test?", prop,
1441 sizeof(prop));
1442
1443 if (strcmp(prop, "true")) {
1444 printk(KERN_NOTICE "SunLance: warning: overriding option "
1445 "'tpe-link-test?'\n");
1446 printk(KERN_NOTICE "SunLance: warning: mail any problems "
1447 "to ecd@skynet.be\n");
1448 auxio_set_lte(AUXIO_LTE_ON);
1449 }
1450 no_link_test:
1451 lp->auto_select = 1;
1452 lp->tpe = 0;
1453 } else if (!strcmp(prop, "aui")) {
1454 lp->auto_select = 0;
1455 lp->tpe = 0;
1456 } else {
1457 lp->auto_select = 0;
1458 lp->tpe = 1;
1459 }
1460
1461 lp->dregs = ledma->regs;
1462
1463 /* Reset ledma */
1464 csr = sbus_readl(lp->dregs + DMA_CSR);
1465 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1466 udelay(200);
1467 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1468 } else
1469 lp->dregs = NULL;
1470
1471 lp->dev = dev;
1472 SET_MODULE_OWNER(dev);
1473 SET_NETDEV_DEV(dev, &sdev->ofdev.dev);
1474 dev->open = &lance_open;
1475 dev->stop = &lance_close;
1476 dev->hard_start_xmit = &lance_start_xmit;
1477 dev->tx_timeout = &lance_tx_timeout;
1478 dev->watchdog_timeo = 5*HZ;
1479 dev->get_stats = &lance_get_stats;
1480 dev->set_multicast_list = &lance_set_multicast;
1481 dev->ethtool_ops = &sparc_lance_ethtool_ops;
1482
1483 dev->irq = sdev->irqs[0];
1484
1485 dev->dma = 0;
1486
1487 /* We cannot sleep if the chip is busy during a
1488 * multicast list update event, because such events
1489 * can occur from interrupts (ex. IPv6). So we
1490 * use a timer to try again later when necessary. -DaveM
1491 */
1492 init_timer(&lp->multicast_timer);
1493 lp->multicast_timer.data = (unsigned long) dev;
1494 lp->multicast_timer.function = &lance_set_multicast_retry;
1495
1496 if (register_netdev(dev)) {
1497 printk(KERN_ERR "SunLance: Cannot register device.\n");
1498 goto fail;
1499 }
1500
1501 dev_set_drvdata(&sdev->ofdev.dev, lp);
1502
1503 printk(KERN_INFO "%s: LANCE ", dev->name);
1504
1505 for (i = 0; i < 6; i++)
1506 printk("%2.2x%c", dev->dev_addr[i],
1507 i == 5 ? ' ': ':');
1508 printk("\n");
1509
1510 return 0;
1511
1512 fail:
1513 lance_free_hwresources(lp);
1514 free_netdev(dev);
1515 return -ENODEV;
1516 }
1517
1518 /* On 4m, find the associated dma for the lance chip */
1519 static inline struct sbus_dma *find_ledma(struct sbus_dev *sdev)
1520 {
1521 struct sbus_dma *p;
1522
1523 for_each_dvma(p) {
1524 if (p->sdev == sdev)
1525 return p;
1526 }
1527 return NULL;
1528 }
1529
1530 #ifdef CONFIG_SUN4
1531
1532 #include <asm/sun4paddr.h>
1533 #include <asm/machines.h>
1534
1535 /* Find all the lance cards on the system and initialize them */
1536 static struct sbus_dev sun4_sdev;
1537 static int __init sparc_lance_init(void)
1538 {
1539 if ((idprom->id_machtype == (SM_SUN4|SM_4_330)) ||
1540 (idprom->id_machtype == (SM_SUN4|SM_4_470))) {
1541 memset(&sun4_sdev, 0, sizeof(sdev));
1542 sun4_sdev.reg_addrs[0].phys_addr = sun4_eth_physaddr;
1543 sun4_sdev.irqs[0] = 6;
1544 return sparc_lance_probe_one(&sun4_sdev, NULL, NULL);
1545 }
1546 return -ENODEV;
1547 }
1548
1549 static int __exit sunlance_sun4_remove(void)
1550 {
1551 struct lance_private *lp = dev_get_drvdata(&sun4_sdev->dev);
1552 struct net_device *net_dev = lp->dev;
1553
1554 unregister_netdevice(net_dev);
1555
1556 lance_free_hwresources(root_lance_dev);
1557
1558 free_netdev(net_dev);
1559
1560 dev_set_drvdata(&sun4_sdev->dev, NULL);
1561
1562 return 0;
1563 }
1564
1565 #else /* !CONFIG_SUN4 */
1566
1567 static int __devinit sunlance_sbus_probe(struct of_device *dev, const struct of_device_id *match)
1568 {
1569 struct sbus_dev *sdev = to_sbus_device(&dev->dev);
1570 struct device_node *dp = dev->node;
1571 int err;
1572
1573 if (!strcmp(dp->name, "le")) {
1574 err = sparc_lance_probe_one(sdev, NULL, NULL);
1575 } else if (!strcmp(dp->name, "ledma")) {
1576 struct sbus_dma *ledma = find_ledma(sdev);
1577
1578 err = sparc_lance_probe_one(sdev->child, ledma, NULL);
1579 } else {
1580 BUG_ON(strcmp(dp->name, "lebuffer"));
1581
1582 err = sparc_lance_probe_one(sdev->child, NULL, sdev);
1583 }
1584
1585 return err;
1586 }
1587
1588 static int __devexit sunlance_sbus_remove(struct of_device *dev)
1589 {
1590 struct lance_private *lp = dev_get_drvdata(&dev->dev);
1591 struct net_device *net_dev = lp->dev;
1592
1593 unregister_netdevice(net_dev);
1594
1595 lance_free_hwresources(lp);
1596
1597 free_netdev(net_dev);
1598
1599 dev_set_drvdata(&dev->dev, NULL);
1600
1601 return 0;
1602 }
1603
1604 static struct of_device_id sunlance_sbus_match[] = {
1605 {
1606 .name = "le",
1607 },
1608 {
1609 .name = "ledma",
1610 },
1611 {
1612 .name = "lebuffer",
1613 },
1614 {},
1615 };
1616
1617 MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1618
1619 static struct of_platform_driver sunlance_sbus_driver = {
1620 .name = "sunlance",
1621 .match_table = sunlance_sbus_match,
1622 .probe = sunlance_sbus_probe,
1623 .remove = __devexit_p(sunlance_sbus_remove),
1624 };
1625
1626
1627 /* Find all the lance cards on the system and initialize them */
1628 static int __init sparc_lance_init(void)
1629 {
1630 return of_register_driver(&sunlance_sbus_driver, &sbus_bus_type);
1631 }
1632 #endif /* !CONFIG_SUN4 */
1633
1634 static void __exit sparc_lance_exit(void)
1635 {
1636 #ifdef CONFIG_SUN4
1637 sunlance_sun4_remove();
1638 #else
1639 of_unregister_driver(&sunlance_sbus_driver);
1640 #endif
1641 }
1642
1643 module_init(sparc_lance_init);
1644 module_exit(sparc_lance_exit);
x86 "subsystem" repository