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[SK_BUFF]: Introduce skb_copy_from_linear_data{_offset}
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / net / sunlance.c
blob42722530ab24501f4ca647ea0b702f33557728e4
1 /* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
2 * lance.c: Linux/Sparc/Lance driver
3 *
4 * Written 1995, 1996 by Miguel de Icaza
5 * Sources:
6 * The Linux depca driver
7 * The Linux lance driver.
8 * The Linux skeleton driver.
9 * The NetBSD Sparc/Lance driver.
10 * Theo de Raadt (deraadt@openbsd.org)
11 * NCR92C990 Lan Controller manual
12 *
13 * 1.4:
14 * Added support to run with a ledma on the Sun4m
15 *
16 * 1.5:
17 * Added multiple card detection.
18 *
19 * 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
20 * (ecd@skynet.be)
21 *
22 * 5/15/96: auto carrier detection on sun4m by Eddie C. Dost
23 * (ecd@skynet.be)
24 *
25 * 5/17/96: lebuffer on scsi/ether cards now work David S. Miller
26 * (davem@caip.rutgers.edu)
27 *
28 * 5/29/96: override option 'tpe-link-test?', if it is 'false', as
29 * this disables auto carrier detection on sun4m. Eddie C. Dost
30 * (ecd@skynet.be)
31 *
32 * 1.7:
33 * 6/26/96: Bug fix for multiple ledmas, miguel.
34 *
35 * 1.8:
36 * Stole multicast code from depca.c, fixed lance_tx.
37 *
38 * 1.9:
39 * 8/21/96: Fixed the multicast code (Pedro Roque)
40 *
41 * 8/28/96: Send fake packet in lance_open() if auto_select is true,
42 * so we can detect the carrier loss condition in time.
43 * Eddie C. Dost (ecd@skynet.be)
44 *
45 * 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
46 * MNA trap during chksum_partial_copy(). (ecd@skynet.be)
47 *
48 * 11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
49 *
50 * 12/22/96: Don't loop forever in lance_rx() on incomplete packets.
51 * This was the sun4c killer. Shit, stupid bug.
52 * (ecd@skynet.be)
53 *
54 * 1.10:
55 * 1/26/97: Modularize driver. (ecd@skynet.be)
56 *
57 * 1.11:
58 * 12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
59 *
60 * 1.12:
61 * 11/3/99: Fixed SMP race in lance_start_xmit found by davem.
62 * Anton Blanchard (anton@progsoc.uts.edu.au)
63 * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
64 * David S. Miller (davem@redhat.com)
65 * 2.01:
66 * 11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
67 *
68 */
69
70 #undef DEBUG_DRIVER
71
72 static char lancestr[] = "LANCE";
73
74 #include <linux/module.h>
75 #include <linux/kernel.h>
76 #include <linux/types.h>
77 #include <linux/fcntl.h>
78 #include <linux/interrupt.h>
79 #include <linux/ioport.h>
80 #include <linux/in.h>
81 #include <linux/slab.h>
82 #include <linux/string.h>
83 #include <linux/delay.h>
84 #include <linux/init.h>
85 #include <linux/crc32.h>
86 #include <linux/errno.h>
87 #include <linux/socket.h> /* Used for the temporal inet entries and routing */
88 #include <linux/route.h>
89 #include <linux/netdevice.h>
90 #include <linux/etherdevice.h>
91 #include <linux/skbuff.h>
92 #include <linux/ethtool.h>
93 #include <linux/bitops.h>
94
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>
102 #include <asm/openprom.h>
103 #include <asm/oplib.h>
104 #include <asm/auxio.h> /* For tpe-link-test? setting */
105 #include <asm/irq.h>
106
107 #define DRV_NAME "sunlance"
108 #define DRV_VERSION "2.02"
109 #define DRV_RELDATE "8/24/03"
110 #define DRV_AUTHOR "Miguel de Icaza (miguel@nuclecu.unam.mx)"
111
112 static char version[] =
113 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
114
115 MODULE_VERSION(DRV_VERSION);
116 MODULE_AUTHOR(DRV_AUTHOR);
117 MODULE_DESCRIPTION("Sun Lance ethernet driver");
118 MODULE_LICENSE("GPL");
119
120 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
121 #ifndef LANCE_LOG_TX_BUFFERS
122 #define LANCE_LOG_TX_BUFFERS 4
123 #define LANCE_LOG_RX_BUFFERS 4
124 #endif
125
126 #define LE_CSR0 0
127 #define LE_CSR1 1
128 #define LE_CSR2 2
129 #define LE_CSR3 3
130
131 #define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
132
133 #define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
134 #define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
135 #define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
136 #define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
137 #define LE_C0_MERR 0x0800 /* ME: Memory error */
138 #define LE_C0_RINT 0x0400 /* Received interrupt */
139 #define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
140 #define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
141 #define LE_C0_INTR 0x0080 /* Interrupt or error */
142 #define LE_C0_INEA 0x0040 /* Interrupt enable */
143 #define LE_C0_RXON 0x0020 /* Receiver on */
144 #define LE_C0_TXON 0x0010 /* Transmitter on */
145 #define LE_C0_TDMD 0x0008 /* Transmitter demand */
146 #define LE_C0_STOP 0x0004 /* Stop the card */
147 #define LE_C0_STRT 0x0002 /* Start the card */
148 #define LE_C0_INIT 0x0001 /* Init the card */
149
150 #define LE_C3_BSWP 0x4 /* SWAP */
151 #define LE_C3_ACON 0x2 /* ALE Control */
152 #define LE_C3_BCON 0x1 /* Byte control */
153
154 /* Receive message descriptor 1 */
155 #define LE_R1_OWN 0x80 /* Who owns the entry */
156 #define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */
157 #define LE_R1_FRA 0x20 /* FRA: Frame error */
158 #define LE_R1_OFL 0x10 /* OFL: Frame overflow */
159 #define LE_R1_CRC 0x08 /* CRC error */
160 #define LE_R1_BUF 0x04 /* BUF: Buffer error */
161 #define LE_R1_SOP 0x02 /* Start of packet */
162 #define LE_R1_EOP 0x01 /* End of packet */
163 #define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */
164
165 #define LE_T1_OWN 0x80 /* Lance owns the packet */
166 #define LE_T1_ERR 0x40 /* Error summary */
167 #define LE_T1_EMORE 0x10 /* Error: more than one retry needed */
168 #define LE_T1_EONE 0x08 /* Error: one retry needed */
169 #define LE_T1_EDEF 0x04 /* Error: deferred */
170 #define LE_T1_SOP 0x02 /* Start of packet */
171 #define LE_T1_EOP 0x01 /* End of packet */
172 #define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */
173
174 #define LE_T3_BUF 0x8000 /* Buffer error */
175 #define LE_T3_UFL 0x4000 /* Error underflow */
176 #define LE_T3_LCOL 0x1000 /* Error late collision */
177 #define LE_T3_CLOS 0x0800 /* Error carrier loss */
178 #define LE_T3_RTY 0x0400 /* Error retry */
179 #define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
180
181 #define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
182 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
183 #define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
184 #define TX_NEXT(__x) (((__x)+1) & TX_RING_MOD_MASK)
185
186 #define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
187 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
188 #define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
189 #define RX_NEXT(__x) (((__x)+1) & RX_RING_MOD_MASK)
190
191 #define PKT_BUF_SZ 1544
192 #define RX_BUFF_SIZE PKT_BUF_SZ
193 #define TX_BUFF_SIZE PKT_BUF_SZ
194
195 struct lance_rx_desc {
196 u16 rmd0; /* low address of packet */
197 u8 rmd1_bits; /* descriptor bits */
198 u8 rmd1_hadr; /* high address of packet */
199 s16 length; /* This length is 2s complement (negative)!
200 * Buffer length
201 */
202 u16 mblength; /* This is the actual number of bytes received */
203 };
204
205 struct lance_tx_desc {
206 u16 tmd0; /* low address of packet */
207 u8 tmd1_bits; /* descriptor bits */
208 u8 tmd1_hadr; /* high address of packet */
209 s16 length; /* Length is 2s complement (negative)! */
210 u16 misc;
211 };
212
213 /* The LANCE initialization block, described in databook. */
214 /* On the Sparc, this block should be on a DMA region */
215 struct lance_init_block {
216 u16 mode; /* Pre-set mode (reg. 15) */
217 u8 phys_addr[6]; /* Physical ethernet address */
218 u32 filter[2]; /* Multicast filter. */
219
220 /* Receive and transmit ring base, along with extra bits. */
221 u16 rx_ptr; /* receive descriptor addr */
222 u16 rx_len; /* receive len and high addr */
223 u16 tx_ptr; /* transmit descriptor addr */
224 u16 tx_len; /* transmit len and high addr */
225
226 /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
227 struct lance_rx_desc brx_ring[RX_RING_SIZE];
228 struct lance_tx_desc btx_ring[TX_RING_SIZE];
229
230 u8 tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
231 u8 pad[2]; /* align rx_buf for copy_and_sum(). */
232 u8 rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
233 };
234
235 #define libdesc_offset(rt, elem) \
236 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
237
238 #define libbuff_offset(rt, elem) \
239 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
240
241 struct lance_private {
242 void __iomem *lregs; /* Lance RAP/RDP regs. */
243 void __iomem *dregs; /* DMA controller regs. */
244 struct lance_init_block __iomem *init_block_iomem;
245 struct lance_init_block *init_block_mem;
246
247 spinlock_t lock;
248
249 int rx_new, tx_new;
250 int rx_old, tx_old;
251
252 struct net_device_stats stats;
253 struct sbus_dma *ledma; /* If set this points to ledma */
254 char tpe; /* cable-selection is TPE */
255 char auto_select; /* cable-selection by carrier */
256 char burst_sizes; /* ledma SBus burst sizes */
257 char pio_buffer; /* init block in PIO space? */
258
259 unsigned short busmaster_regval;
260
261 void (*init_ring)(struct net_device *);
262 void (*rx)(struct net_device *);
263 void (*tx)(struct net_device *);
264
265 char *name;
266 dma_addr_t init_block_dvma;
267 struct net_device *dev; /* Backpointer */
268 struct sbus_dev *sdev;
269 struct timer_list multicast_timer;
270 };
271
272 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
273 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
274 lp->tx_old - lp->tx_new-1)
275
276 /* Lance registers. */
277 #define RDP 0x00UL /* register data port */
278 #define RAP 0x02UL /* register address port */
279 #define LANCE_REG_SIZE 0x04UL
280
281 #define STOP_LANCE(__lp) \
282 do { void __iomem *__base = (__lp)->lregs; \
283 sbus_writew(LE_CSR0, __base + RAP); \
284 sbus_writew(LE_C0_STOP, __base + RDP); \
285 } while (0)
286
287 int sparc_lance_debug = 2;
288
289 /* The Lance uses 24 bit addresses */
290 /* On the Sun4c the DVMA will provide the remaining bytes for us */
291 /* On the Sun4m we have to instruct the ledma to provide them */
292 /* Even worse, on scsi/ether SBUS cards, the init block and the
293 * transmit/receive buffers are addresses as offsets from absolute
294 * zero on the lebuffer PIO area. -DaveM
295 */
296
297 #define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
298
299 /* Load the CSR registers */
300 static void load_csrs(struct lance_private *lp)
301 {
302 u32 leptr;
303
304 if (lp->pio_buffer)
305 leptr = 0;
306 else
307 leptr = LANCE_ADDR(lp->init_block_dvma);
308
309 sbus_writew(LE_CSR1, lp->lregs + RAP);
310 sbus_writew(leptr & 0xffff, lp->lregs + RDP);
311 sbus_writew(LE_CSR2, lp->lregs + RAP);
312 sbus_writew(leptr >> 16, lp->lregs + RDP);
313 sbus_writew(LE_CSR3, lp->lregs + RAP);
314 sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
315
316 /* Point back to csr0 */
317 sbus_writew(LE_CSR0, lp->lregs + RAP);
318 }
319
320 /* Setup the Lance Rx and Tx rings */
321 static void lance_init_ring_dvma(struct net_device *dev)
322 {
323 struct lance_private *lp = netdev_priv(dev);
324 struct lance_init_block *ib = lp->init_block_mem;
325 dma_addr_t aib = lp->init_block_dvma;
326 __u32 leptr;
327 int i;
328
329 /* Lock out other processes while setting up hardware */
330 netif_stop_queue(dev);
331 lp->rx_new = lp->tx_new = 0;
332 lp->rx_old = lp->tx_old = 0;
333
334 /* Copy the ethernet address to the lance init block
335 * Note that on the sparc you need to swap the ethernet address.
336 */
337 ib->phys_addr [0] = dev->dev_addr [1];
338 ib->phys_addr [1] = dev->dev_addr [0];
339 ib->phys_addr [2] = dev->dev_addr [3];
340 ib->phys_addr [3] = dev->dev_addr [2];
341 ib->phys_addr [4] = dev->dev_addr [5];
342 ib->phys_addr [5] = dev->dev_addr [4];
343
344 /* Setup the Tx ring entries */
345 for (i = 0; i <= TX_RING_SIZE; i++) {
346 leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
347 ib->btx_ring [i].tmd0 = leptr;
348 ib->btx_ring [i].tmd1_hadr = leptr >> 16;
349 ib->btx_ring [i].tmd1_bits = 0;
350 ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */
351 ib->btx_ring [i].misc = 0;
352 }
353
354 /* Setup the Rx ring entries */
355 for (i = 0; i < RX_RING_SIZE; i++) {
356 leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
357
358 ib->brx_ring [i].rmd0 = leptr;
359 ib->brx_ring [i].rmd1_hadr = leptr >> 16;
360 ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
361 ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000;
362 ib->brx_ring [i].mblength = 0;
363 }
364
365 /* Setup the initialization block */
366
367 /* Setup rx descriptor pointer */
368 leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
369 ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
370 ib->rx_ptr = leptr;
371
372 /* Setup tx descriptor pointer */
373 leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
374 ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
375 ib->tx_ptr = leptr;
376 }
377
378 static void lance_init_ring_pio(struct net_device *dev)
379 {
380 struct lance_private *lp = netdev_priv(dev);
381 struct lance_init_block __iomem *ib = lp->init_block_iomem;
382 u32 leptr;
383 int i;
384
385 /* Lock out other processes while setting up hardware */
386 netif_stop_queue(dev);
387 lp->rx_new = lp->tx_new = 0;
388 lp->rx_old = lp->tx_old = 0;
389
390 /* Copy the ethernet address to the lance init block
391 * Note that on the sparc you need to swap the ethernet address.
392 */
393 sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
394 sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
395 sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
396 sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
397 sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
398 sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
399
400 /* Setup the Tx ring entries */
401 for (i = 0; i <= TX_RING_SIZE; i++) {
402 leptr = libbuff_offset(tx_buf, i);
403 sbus_writew(leptr, &ib->btx_ring [i].tmd0);
404 sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
405 sbus_writeb(0, &ib->btx_ring [i].tmd1_bits);
406
407 /* The ones required by tmd2 */
408 sbus_writew(0xf000, &ib->btx_ring [i].length);
409 sbus_writew(0, &ib->btx_ring [i].misc);
410 }
411
412 /* Setup the Rx ring entries */
413 for (i = 0; i < RX_RING_SIZE; i++) {
414 leptr = libbuff_offset(rx_buf, i);
415
416 sbus_writew(leptr, &ib->brx_ring [i].rmd0);
417 sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
418 sbus_writeb(LE_R1_OWN, &ib->brx_ring [i].rmd1_bits);
419 sbus_writew(-RX_BUFF_SIZE|0xf000,
420 &ib->brx_ring [i].length);
421 sbus_writew(0, &ib->brx_ring [i].mblength);
422 }
423
424 /* Setup the initialization block */
425
426 /* Setup rx descriptor pointer */
427 leptr = libdesc_offset(brx_ring, 0);
428 sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
429 &ib->rx_len);
430 sbus_writew(leptr, &ib->rx_ptr);
431
432 /* Setup tx descriptor pointer */
433 leptr = libdesc_offset(btx_ring, 0);
434 sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
435 &ib->tx_len);
436 sbus_writew(leptr, &ib->tx_ptr);
437 }
438
439 static void init_restart_ledma(struct lance_private *lp)
440 {
441 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
442
443 if (!(csr & DMA_HNDL_ERROR)) {
444 /* E-Cache draining */
445 while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
446 barrier();
447 }
448
449 csr = sbus_readl(lp->dregs + DMA_CSR);
450 csr &= ~DMA_E_BURSTS;
451 if (lp->burst_sizes & DMA_BURST32)
452 csr |= DMA_E_BURST32;
453 else
454 csr |= DMA_E_BURST16;
455
456 csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
457
458 if (lp->tpe)
459 csr |= DMA_EN_ENETAUI;
460 else
461 csr &= ~DMA_EN_ENETAUI;
462 udelay(20);
463 sbus_writel(csr, lp->dregs + DMA_CSR);
464 udelay(200);
465 }
466
467 static int init_restart_lance(struct lance_private *lp)
468 {
469 u16 regval = 0;
470 int i;
471
472 if (lp->dregs)
473 init_restart_ledma(lp);
474
475 sbus_writew(LE_CSR0, lp->lregs + RAP);
476 sbus_writew(LE_C0_INIT, lp->lregs + RDP);
477
478 /* Wait for the lance to complete initialization */
479 for (i = 0; i < 100; i++) {
480 regval = sbus_readw(lp->lregs + RDP);
481
482 if (regval & (LE_C0_ERR | LE_C0_IDON))
483 break;
484 barrier();
485 }
486 if (i == 100 || (regval & LE_C0_ERR)) {
487 printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
488 i, regval);
489 if (lp->dregs)
490 printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
491 return -1;
492 }
493
494 /* Clear IDON by writing a "1", enable interrupts and start lance */
495 sbus_writew(LE_C0_IDON, lp->lregs + RDP);
496 sbus_writew(LE_C0_INEA | LE_C0_STRT, lp->lregs + RDP);
497
498 if (lp->dregs) {
499 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
500
501 csr |= DMA_INT_ENAB;
502 sbus_writel(csr, lp->dregs + DMA_CSR);
503 }
504
505 return 0;
506 }
507
508 static void lance_rx_dvma(struct net_device *dev)
509 {
510 struct lance_private *lp = netdev_priv(dev);
511 struct lance_init_block *ib = lp->init_block_mem;
512 struct lance_rx_desc *rd;
513 u8 bits;
514 int len, entry = lp->rx_new;
515 struct sk_buff *skb;
516
517 for (rd = &ib->brx_ring [entry];
518 !((bits = rd->rmd1_bits) & LE_R1_OWN);
519 rd = &ib->brx_ring [entry]) {
520
521 /* We got an incomplete frame? */
522 if ((bits & LE_R1_POK) != LE_R1_POK) {
523 lp->stats.rx_over_errors++;
524 lp->stats.rx_errors++;
525 } else if (bits & LE_R1_ERR) {
526 /* Count only the end frame as a rx error,
527 * not the beginning
528 */
529 if (bits & LE_R1_BUF) lp->stats.rx_fifo_errors++;
530 if (bits & LE_R1_CRC) lp->stats.rx_crc_errors++;
531 if (bits & LE_R1_OFL) lp->stats.rx_over_errors++;
532 if (bits & LE_R1_FRA) lp->stats.rx_frame_errors++;
533 if (bits & LE_R1_EOP) lp->stats.rx_errors++;
534 } else {
535 len = (rd->mblength & 0xfff) - 4;
536 skb = dev_alloc_skb(len + 2);
537
538 if (skb == NULL) {
539 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
540 dev->name);
541 lp->stats.rx_dropped++;
542 rd->mblength = 0;
543 rd->rmd1_bits = LE_R1_OWN;
544 lp->rx_new = RX_NEXT(entry);
545 return;
546 }
547
548 lp->stats.rx_bytes += len;
549
550 skb_reserve(skb, 2); /* 16 byte align */
551 skb_put(skb, len); /* make room */
552 eth_copy_and_sum(skb,
553 (unsigned char *)&(ib->rx_buf [entry][0]),
554 len, 0);
555 skb->protocol = eth_type_trans(skb, dev);
556 netif_rx(skb);
557 dev->last_rx = jiffies;
558 lp->stats.rx_packets++;
559 }
560
561 /* Return the packet to the pool */
562 rd->mblength = 0;
563 rd->rmd1_bits = LE_R1_OWN;
564 entry = RX_NEXT(entry);
565 }
566
567 lp->rx_new = entry;
568 }
569
570 static void lance_tx_dvma(struct net_device *dev)
571 {
572 struct lance_private *lp = netdev_priv(dev);
573 struct lance_init_block *ib = lp->init_block_mem;
574 int i, j;
575
576 spin_lock(&lp->lock);
577
578 j = lp->tx_old;
579 for (i = j; i != lp->tx_new; i = j) {
580 struct lance_tx_desc *td = &ib->btx_ring [i];
581 u8 bits = td->tmd1_bits;
582
583 /* If we hit a packet not owned by us, stop */
584 if (bits & LE_T1_OWN)
585 break;
586
587 if (bits & LE_T1_ERR) {
588 u16 status = td->misc;
589
590 lp->stats.tx_errors++;
591 if (status & LE_T3_RTY) lp->stats.tx_aborted_errors++;
592 if (status & LE_T3_LCOL) lp->stats.tx_window_errors++;
593
594 if (status & LE_T3_CLOS) {
595 lp->stats.tx_carrier_errors++;
596 if (lp->auto_select) {
597 lp->tpe = 1 - lp->tpe;
598 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
599 dev->name, lp->tpe?"TPE":"AUI");
600 STOP_LANCE(lp);
601 lp->init_ring(dev);
602 load_csrs(lp);
603 init_restart_lance(lp);
604 goto out;
605 }
606 }
607
608 /* Buffer errors and underflows turn off the
609 * transmitter, restart the adapter.
610 */
611 if (status & (LE_T3_BUF|LE_T3_UFL)) {
612 lp->stats.tx_fifo_errors++;
613
614 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
615 dev->name);
616 STOP_LANCE(lp);
617 lp->init_ring(dev);
618 load_csrs(lp);
619 init_restart_lance(lp);
620 goto out;
621 }
622 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
623 /*
624 * So we don't count the packet more than once.
625 */
626 td->tmd1_bits = bits & ~(LE_T1_POK);
627
628 /* One collision before packet was sent. */
629 if (bits & LE_T1_EONE)
630 lp->stats.collisions++;
631
632 /* More than one collision, be optimistic. */
633 if (bits & LE_T1_EMORE)
634 lp->stats.collisions += 2;
635
636 lp->stats.tx_packets++;
637 }
638
639 j = TX_NEXT(j);
640 }
641 lp->tx_old = j;
642 out:
643 if (netif_queue_stopped(dev) &&
644 TX_BUFFS_AVAIL > 0)
645 netif_wake_queue(dev);
646
647 spin_unlock(&lp->lock);
648 }
649
650 static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
651 {
652 u16 *p16 = (u16 *) skb->data;
653 u32 *p32;
654 u8 *p8;
655 void __iomem *pbuf = piobuf;
656
657 /* We know here that both src and dest are on a 16bit boundary. */
658 *p16++ = sbus_readw(pbuf);
659 p32 = (u32 *) p16;
660 pbuf += 2;
661 len -= 2;
662
663 while (len >= 4) {
664 *p32++ = sbus_readl(pbuf);
665 pbuf += 4;
666 len -= 4;
667 }
668 p8 = (u8 *) p32;
669 if (len >= 2) {
670 p16 = (u16 *) p32;
671 *p16++ = sbus_readw(pbuf);
672 pbuf += 2;
673 len -= 2;
674 p8 = (u8 *) p16;
675 }
676 if (len >= 1)
677 *p8 = sbus_readb(pbuf);
678 }
679
680 static void lance_rx_pio(struct net_device *dev)
681 {
682 struct lance_private *lp = netdev_priv(dev);
683 struct lance_init_block __iomem *ib = lp->init_block_iomem;
684 struct lance_rx_desc __iomem *rd;
685 unsigned char bits;
686 int len, entry;
687 struct sk_buff *skb;
688
689 entry = lp->rx_new;
690 for (rd = &ib->brx_ring [entry];
691 !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
692 rd = &ib->brx_ring [entry]) {
693
694 /* We got an incomplete frame? */
695 if ((bits & LE_R1_POK) != LE_R1_POK) {
696 lp->stats.rx_over_errors++;
697 lp->stats.rx_errors++;
698 } else if (bits & LE_R1_ERR) {
699 /* Count only the end frame as a rx error,
700 * not the beginning
701 */
702 if (bits & LE_R1_BUF) lp->stats.rx_fifo_errors++;
703 if (bits & LE_R1_CRC) lp->stats.rx_crc_errors++;
704 if (bits & LE_R1_OFL) lp->stats.rx_over_errors++;
705 if (bits & LE_R1_FRA) lp->stats.rx_frame_errors++;
706 if (bits & LE_R1_EOP) lp->stats.rx_errors++;
707 } else {
708 len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
709 skb = dev_alloc_skb(len + 2);
710
711 if (skb == NULL) {
712 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
713 dev->name);
714 lp->stats.rx_dropped++;
715 sbus_writew(0, &rd->mblength);
716 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
717 lp->rx_new = RX_NEXT(entry);
718 return;
719 }
720
721 lp->stats.rx_bytes += len;
722
723 skb_reserve (skb, 2); /* 16 byte align */
724 skb_put(skb, len); /* make room */
725 lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
726 skb->protocol = eth_type_trans(skb, dev);
727 netif_rx(skb);
728 dev->last_rx = jiffies;
729 lp->stats.rx_packets++;
730 }
731
732 /* Return the packet to the pool */
733 sbus_writew(0, &rd->mblength);
734 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
735 entry = RX_NEXT(entry);
736 }
737
738 lp->rx_new = entry;
739 }
740
741 static void lance_tx_pio(struct net_device *dev)
742 {
743 struct lance_private *lp = netdev_priv(dev);
744 struct lance_init_block __iomem *ib = lp->init_block_iomem;
745 int i, j;
746
747 spin_lock(&lp->lock);
748
749 j = lp->tx_old;
750 for (i = j; i != lp->tx_new; i = j) {
751 struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
752 u8 bits = sbus_readb(&td->tmd1_bits);
753
754 /* If we hit a packet not owned by us, stop */
755 if (bits & LE_T1_OWN)
756 break;
757
758 if (bits & LE_T1_ERR) {
759 u16 status = sbus_readw(&td->misc);
760
761 lp->stats.tx_errors++;
762 if (status & LE_T3_RTY) lp->stats.tx_aborted_errors++;
763 if (status & LE_T3_LCOL) lp->stats.tx_window_errors++;
764
765 if (status & LE_T3_CLOS) {
766 lp->stats.tx_carrier_errors++;
767 if (lp->auto_select) {
768 lp->tpe = 1 - lp->tpe;
769 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
770 dev->name, lp->tpe?"TPE":"AUI");
771 STOP_LANCE(lp);
772 lp->init_ring(dev);
773 load_csrs(lp);
774 init_restart_lance(lp);
775 goto out;
776 }
777 }
778
779 /* Buffer errors and underflows turn off the
780 * transmitter, restart the adapter.
781 */
782 if (status & (LE_T3_BUF|LE_T3_UFL)) {
783 lp->stats.tx_fifo_errors++;
784
785 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
786 dev->name);
787 STOP_LANCE(lp);
788 lp->init_ring(dev);
789 load_csrs(lp);
790 init_restart_lance(lp);
791 goto out;
792 }
793 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
794 /*
795 * So we don't count the packet more than once.
796 */
797 sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
798
799 /* One collision before packet was sent. */
800 if (bits & LE_T1_EONE)
801 lp->stats.collisions++;
802
803 /* More than one collision, be optimistic. */
804 if (bits & LE_T1_EMORE)
805 lp->stats.collisions += 2;
806
807 lp->stats.tx_packets++;
808 }
809
810 j = TX_NEXT(j);
811 }
812 lp->tx_old = j;
813
814 if (netif_queue_stopped(dev) &&
815 TX_BUFFS_AVAIL > 0)
816 netif_wake_queue(dev);
817 out:
818 spin_unlock(&lp->lock);
819 }
820
821 static irqreturn_t lance_interrupt(int irq, void *dev_id)
822 {
823 struct net_device *dev = dev_id;
824 struct lance_private *lp = netdev_priv(dev);
825 int csr0;
826
827 sbus_writew(LE_CSR0, lp->lregs + RAP);
828 csr0 = sbus_readw(lp->lregs + RDP);
829
830 /* Acknowledge all the interrupt sources ASAP */
831 sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
832 lp->lregs + RDP);
833
834 if ((csr0 & LE_C0_ERR) != 0) {
835 /* Clear the error condition */
836 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
837 LE_C0_CERR | LE_C0_MERR),
838 lp->lregs + RDP);
839 }
840
841 if (csr0 & LE_C0_RINT)
842 lp->rx(dev);
843
844 if (csr0 & LE_C0_TINT)
845 lp->tx(dev);
846
847 if (csr0 & LE_C0_BABL)
848 lp->stats.tx_errors++;
849
850 if (csr0 & LE_C0_MISS)
851 lp->stats.rx_errors++;
852
853 if (csr0 & LE_C0_MERR) {
854 if (lp->dregs) {
855 u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
856
857 printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
858 dev->name, csr0, addr & 0xffffff);
859 } else {
860 printk(KERN_ERR "%s: Memory error, status %04x\n",
861 dev->name, csr0);
862 }
863
864 sbus_writew(LE_C0_STOP, lp->lregs + RDP);
865
866 if (lp->dregs) {
867 u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
868
869 dma_csr |= DMA_FIFO_INV;
870 sbus_writel(dma_csr, lp->dregs + DMA_CSR);
871 }
872
873 lp->init_ring(dev);
874 load_csrs(lp);
875 init_restart_lance(lp);
876 netif_wake_queue(dev);
877 }
878
879 sbus_writew(LE_C0_INEA, lp->lregs + RDP);
880
881 return IRQ_HANDLED;
882 }
883
884 /* Build a fake network packet and send it to ourselves. */
885 static void build_fake_packet(struct lance_private *lp)
886 {
887 struct net_device *dev = lp->dev;
888 int i, entry;
889
890 entry = lp->tx_new & TX_RING_MOD_MASK;
891 if (lp->pio_buffer) {
892 struct lance_init_block __iomem *ib = lp->init_block_iomem;
893 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
894 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
895 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
896 sbus_writew(0, &packet[i]);
897 for (i = 0; i < 6; i++) {
898 sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
899 sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
900 }
901 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
902 sbus_writew(0, &ib->btx_ring[entry].misc);
903 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
904 } else {
905 struct lance_init_block *ib = lp->init_block_mem;
906 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
907 struct ethhdr *eth = (struct ethhdr *) packet;
908 memset(packet, 0, ETH_ZLEN);
909 for (i = 0; i < 6; i++) {
910 eth->h_dest[i] = dev->dev_addr[i];
911 eth->h_source[i] = dev->dev_addr[i];
912 }
913 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
914 ib->btx_ring[entry].misc = 0;
915 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
916 }
917 lp->tx_new = TX_NEXT(entry);
918 }
919
920 struct net_device *last_dev;
921
922 static int lance_open(struct net_device *dev)
923 {
924 struct lance_private *lp = netdev_priv(dev);
925 int status = 0;
926
927 last_dev = dev;
928
929 STOP_LANCE(lp);
930
931 if (request_irq(dev->irq, &lance_interrupt, IRQF_SHARED,
932 lancestr, (void *) dev)) {
933 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
934 return -EAGAIN;
935 }
936
937 /* On the 4m, setup the ledma to provide the upper bits for buffers */
938 if (lp->dregs) {
939 u32 regval = lp->init_block_dvma & 0xff000000;
940
941 sbus_writel(regval, lp->dregs + DMA_TEST);
942 }
943
944 /* Set mode and clear multicast filter only at device open,
945 * so that lance_init_ring() called at any error will not
946 * forget multicast filters.
947 *
948 * BTW it is common bug in all lance drivers! --ANK
949 */
950 if (lp->pio_buffer) {
951 struct lance_init_block __iomem *ib = lp->init_block_iomem;
952 sbus_writew(0, &ib->mode);
953 sbus_writel(0, &ib->filter[0]);
954 sbus_writel(0, &ib->filter[1]);
955 } else {
956 struct lance_init_block *ib = lp->init_block_mem;
957 ib->mode = 0;
958 ib->filter [0] = 0;
959 ib->filter [1] = 0;
960 }
961
962 lp->init_ring(dev);
963 load_csrs(lp);
964
965 netif_start_queue(dev);
966
967 status = init_restart_lance(lp);
968 if (!status && lp->auto_select) {
969 build_fake_packet(lp);
970 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
971 }
972
973 return status;
974 }
975
976 static int lance_close(struct net_device *dev)
977 {
978 struct lance_private *lp = netdev_priv(dev);
979
980 netif_stop_queue(dev);
981 del_timer_sync(&lp->multicast_timer);
982
983 STOP_LANCE(lp);
984
985 free_irq(dev->irq, (void *) dev);
986 return 0;
987 }
988
989 static int lance_reset(struct net_device *dev)
990 {
991 struct lance_private *lp = netdev_priv(dev);
992 int status;
993
994 STOP_LANCE(lp);
995
996 /* On the 4m, reset the dma too */
997 if (lp->dregs) {
998 u32 csr, addr;
999
1000 printk(KERN_ERR "resetting ledma\n");
1001 csr = sbus_readl(lp->dregs + DMA_CSR);
1002 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1003 udelay(200);
1004 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1005
1006 addr = lp->init_block_dvma & 0xff000000;
1007 sbus_writel(addr, lp->dregs + DMA_TEST);
1008 }
1009 lp->init_ring(dev);
1010 load_csrs(lp);
1011 dev->trans_start = jiffies;
1012 status = init_restart_lance(lp);
1013 return status;
1014 }
1015
1016 static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1017 {
1018 void __iomem *piobuf = dest;
1019 u32 *p32;
1020 u16 *p16;
1021 u8 *p8;
1022
1023 switch ((unsigned long)src & 0x3) {
1024 case 0:
1025 p32 = (u32 *) src;
1026 while (len >= 4) {
1027 sbus_writel(*p32, piobuf);
1028 p32++;
1029 piobuf += 4;
1030 len -= 4;
1031 }
1032 src = (char *) p32;
1033 break;
1034 case 1:
1035 case 3:
1036 p8 = (u8 *) src;
1037 while (len >= 4) {
1038 u32 val;
1039
1040 val = p8[0] << 24;
1041 val |= p8[1] << 16;
1042 val |= p8[2] << 8;
1043 val |= p8[3];
1044 sbus_writel(val, piobuf);
1045 p8 += 4;
1046 piobuf += 4;
1047 len -= 4;
1048 }
1049 src = (char *) p8;
1050 break;
1051 case 2:
1052 p16 = (u16 *) src;
1053 while (len >= 4) {
1054 u32 val = p16[0]<<16 | p16[1];
1055 sbus_writel(val, piobuf);
1056 p16 += 2;
1057 piobuf += 4;
1058 len -= 4;
1059 }
1060 src = (char *) p16;
1061 break;
1062 };
1063 if (len >= 2) {
1064 u16 val = src[0] << 8 | src[1];
1065 sbus_writew(val, piobuf);
1066 src += 2;
1067 piobuf += 2;
1068 len -= 2;
1069 }
1070 if (len >= 1)
1071 sbus_writeb(src[0], piobuf);
1072 }
1073
1074 static void lance_piozero(void __iomem *dest, int len)
1075 {
1076 void __iomem *piobuf = dest;
1077
1078 if ((unsigned long)piobuf & 1) {
1079 sbus_writeb(0, piobuf);
1080 piobuf += 1;
1081 len -= 1;
1082 if (len == 0)
1083 return;
1084 }
1085 if (len == 1) {
1086 sbus_writeb(0, piobuf);
1087 return;
1088 }
1089 if ((unsigned long)piobuf & 2) {
1090 sbus_writew(0, piobuf);
1091 piobuf += 2;
1092 len -= 2;
1093 if (len == 0)
1094 return;
1095 }
1096 while (len >= 4) {
1097 sbus_writel(0, piobuf);
1098 piobuf += 4;
1099 len -= 4;
1100 }
1101 if (len >= 2) {
1102 sbus_writew(0, piobuf);
1103 piobuf += 2;
1104 len -= 2;
1105 }
1106 if (len >= 1)
1107 sbus_writeb(0, piobuf);
1108 }
1109
1110 static void lance_tx_timeout(struct net_device *dev)
1111 {
1112 struct lance_private *lp = netdev_priv(dev);
1113
1114 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1115 dev->name, sbus_readw(lp->lregs + RDP));
1116 lance_reset(dev);
1117 netif_wake_queue(dev);
1118 }
1119
1120 static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1121 {
1122 struct lance_private *lp = netdev_priv(dev);
1123 int entry, skblen, len;
1124
1125 skblen = skb->len;
1126
1127 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1128
1129 spin_lock_irq(&lp->lock);
1130
1131 lp->stats.tx_bytes += len;
1132
1133 entry = lp->tx_new & TX_RING_MOD_MASK;
1134 if (lp->pio_buffer) {
1135 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1136 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1137 sbus_writew(0, &ib->btx_ring[entry].misc);
1138 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1139 if (len != skblen)
1140 lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1141 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1142 } else {
1143 struct lance_init_block *ib = lp->init_block_mem;
1144 ib->btx_ring [entry].length = (-len) | 0xf000;
1145 ib->btx_ring [entry].misc = 0;
1146 skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1147 if (len != skblen)
1148 memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1149 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1150 }
1151
1152 lp->tx_new = TX_NEXT(entry);
1153
1154 if (TX_BUFFS_AVAIL <= 0)
1155 netif_stop_queue(dev);
1156
1157 /* Kick the lance: transmit now */
1158 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1159
1160 /* Read back CSR to invalidate the E-Cache.
1161 * This is needed, because DMA_DSBL_WR_INV is set.
1162 */
1163 if (lp->dregs)
1164 sbus_readw(lp->lregs + RDP);
1165
1166 spin_unlock_irq(&lp->lock);
1167
1168 dev->trans_start = jiffies;
1169 dev_kfree_skb(skb);
1170
1171 return 0;
1172 }
1173
1174 static struct net_device_stats *lance_get_stats(struct net_device *dev)
1175 {
1176 struct lance_private *lp = netdev_priv(dev);
1177
1178 return &lp->stats;
1179 }
1180
1181 /* taken from the depca driver */
1182 static void lance_load_multicast(struct net_device *dev)
1183 {
1184 struct lance_private *lp = netdev_priv(dev);
1185 struct dev_mc_list *dmi = dev->mc_list;
1186 char *addrs;
1187 int i;
1188 u32 crc;
1189 u32 val;
1190
1191 /* set all multicast bits */
1192 if (dev->flags & IFF_ALLMULTI)
1193 val = ~0;
1194 else
1195 val = 0;
1196
1197 if (lp->pio_buffer) {
1198 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1199 sbus_writel(val, &ib->filter[0]);
1200 sbus_writel(val, &ib->filter[1]);
1201 } else {
1202 struct lance_init_block *ib = lp->init_block_mem;
1203 ib->filter [0] = val;
1204 ib->filter [1] = val;
1205 }
1206
1207 if (dev->flags & IFF_ALLMULTI)
1208 return;
1209
1210 /* Add addresses */
1211 for (i = 0; i < dev->mc_count; i++) {
1212 addrs = dmi->dmi_addr;
1213 dmi = dmi->next;
1214
1215 /* multicast address? */
1216 if (!(*addrs & 1))
1217 continue;
1218 crc = ether_crc_le(6, addrs);
1219 crc = crc >> 26;
1220 if (lp->pio_buffer) {
1221 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1222 u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1223 u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1224 tmp |= 1 << (crc & 0xf);
1225 sbus_writew(tmp, &mcast_table[crc>>4]);
1226 } else {
1227 struct lance_init_block *ib = lp->init_block_mem;
1228 u16 *mcast_table = (u16 *) &ib->filter;
1229 mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1230 }
1231 }
1232 }
1233
1234 static void lance_set_multicast(struct net_device *dev)
1235 {
1236 struct lance_private *lp = netdev_priv(dev);
1237 struct lance_init_block *ib_mem = lp->init_block_mem;
1238 struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1239 u16 mode;
1240
1241 if (!netif_running(dev))
1242 return;
1243
1244 if (lp->tx_old != lp->tx_new) {
1245 mod_timer(&lp->multicast_timer, jiffies + 4);
1246 netif_wake_queue(dev);
1247 return;
1248 }
1249
1250 netif_stop_queue(dev);
1251
1252 STOP_LANCE(lp);
1253 lp->init_ring(dev);
1254
1255 if (lp->pio_buffer)
1256 mode = sbus_readw(&ib_iomem->mode);
1257 else
1258 mode = ib_mem->mode;
1259 if (dev->flags & IFF_PROMISC) {
1260 mode |= LE_MO_PROM;
1261 if (lp->pio_buffer)
1262 sbus_writew(mode, &ib_iomem->mode);
1263 else
1264 ib_mem->mode = mode;
1265 } else {
1266 mode &= ~LE_MO_PROM;
1267 if (lp->pio_buffer)
1268 sbus_writew(mode, &ib_iomem->mode);
1269 else
1270 ib_mem->mode = mode;
1271 lance_load_multicast(dev);
1272 }
1273 load_csrs(lp);
1274 init_restart_lance(lp);
1275 netif_wake_queue(dev);
1276 }
1277
1278 static void lance_set_multicast_retry(unsigned long _opaque)
1279 {
1280 struct net_device *dev = (struct net_device *) _opaque;
1281
1282 lance_set_multicast(dev);
1283 }
1284
1285 static void lance_free_hwresources(struct lance_private *lp)
1286 {
1287 if (lp->lregs)
1288 sbus_iounmap(lp->lregs, LANCE_REG_SIZE);
1289 if (lp->init_block_iomem) {
1290 sbus_iounmap(lp->init_block_iomem,
1291 sizeof(struct lance_init_block));
1292 } else if (lp->init_block_mem) {
1293 sbus_free_consistent(lp->sdev,
1294 sizeof(struct lance_init_block),
1295 lp->init_block_mem,
1296 lp->init_block_dvma);
1297 }
1298 }
1299
1300 /* Ethtool support... */
1301 static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1302 {
1303 struct lance_private *lp = netdev_priv(dev);
1304
1305 strcpy(info->driver, "sunlance");
1306 strcpy(info->version, "2.02");
1307 sprintf(info->bus_info, "SBUS:%d",
1308 lp->sdev->slot);
1309 }
1310
1311 static u32 sparc_lance_get_link(struct net_device *dev)
1312 {
1313 /* We really do not keep track of this, but this
1314 * is better than not reporting anything at all.
1315 */
1316 return 1;
1317 }
1318
1319 static const struct ethtool_ops sparc_lance_ethtool_ops = {
1320 .get_drvinfo = sparc_lance_get_drvinfo,
1321 .get_link = sparc_lance_get_link,
1322 };
1323
1324 static int __devinit sparc_lance_probe_one(struct sbus_dev *sdev,
1325 struct sbus_dma *ledma,
1326 struct sbus_dev *lebuffer)
1327 {
1328 static unsigned version_printed;
1329 struct net_device *dev;
1330 struct lance_private *lp;
1331 int i;
1332
1333 dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1334 if (!dev)
1335 return -ENOMEM;
1336
1337 lp = netdev_priv(dev);
1338 memset(lp, 0, sizeof(*lp));
1339
1340 if (sparc_lance_debug && version_printed++ == 0)
1341 printk (KERN_INFO "%s", version);
1342
1343 spin_lock_init(&lp->lock);
1344
1345 /* Copy the IDPROM ethernet address to the device structure, later we
1346 * will copy the address in the device structure to the lance
1347 * initialization block.
1348 */
1349 for (i = 0; i < 6; i++)
1350 dev->dev_addr[i] = idprom->id_ethaddr[i];
1351
1352 /* Get the IO region */
1353 lp->lregs = sbus_ioremap(&sdev->resource[0], 0,
1354 LANCE_REG_SIZE, lancestr);
1355 if (!lp->lregs) {
1356 printk(KERN_ERR "SunLance: Cannot map registers.\n");
1357 goto fail;
1358 }
1359
1360 lp->sdev = sdev;
1361 if (lebuffer) {
1362 /* sanity check */
1363 if (lebuffer->resource[0].start & 7) {
1364 printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1365 goto fail;
1366 }
1367 lp->init_block_iomem =
1368 sbus_ioremap(&lebuffer->resource[0], 0,
1369 sizeof(struct lance_init_block), "lebuffer");
1370 if (!lp->init_block_iomem) {
1371 printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1372 goto fail;
1373 }
1374 lp->init_block_dvma = 0;
1375 lp->pio_buffer = 1;
1376 lp->init_ring = lance_init_ring_pio;
1377 lp->rx = lance_rx_pio;
1378 lp->tx = lance_tx_pio;
1379 } else {
1380 lp->init_block_mem =
1381 sbus_alloc_consistent(sdev, sizeof(struct lance_init_block),
1382 &lp->init_block_dvma);
1383 if (!lp->init_block_mem || lp->init_block_dvma == 0) {
1384 printk(KERN_ERR "SunLance: Cannot allocate consistent DMA memory.\n");
1385 goto fail;
1386 }
1387 lp->pio_buffer = 0;
1388 lp->init_ring = lance_init_ring_dvma;
1389 lp->rx = lance_rx_dvma;
1390 lp->tx = lance_tx_dvma;
1391 }
1392 lp->busmaster_regval = prom_getintdefault(sdev->prom_node,
1393 "busmaster-regval",
1394 (LE_C3_BSWP | LE_C3_ACON |
1395 LE_C3_BCON));
1396
1397 lp->name = lancestr;
1398 lp->ledma = ledma;
1399
1400 lp->burst_sizes = 0;
1401 if (lp->ledma) {
1402 char prop[6];
1403 unsigned int sbmask;
1404 u32 csr;
1405
1406 /* Find burst-size property for ledma */
1407 lp->burst_sizes = prom_getintdefault(ledma->sdev->prom_node,
1408 "burst-sizes", 0);
1409
1410 /* ledma may be capable of fast bursts, but sbus may not. */
1411 sbmask = prom_getintdefault(ledma->sdev->bus->prom_node,
1412 "burst-sizes", DMA_BURSTBITS);
1413 lp->burst_sizes &= sbmask;
1414
1415 /* Get the cable-selection property */
1416 memset(prop, 0, sizeof(prop));
1417 prom_getstring(ledma->sdev->prom_node, "cable-selection",
1418 prop, sizeof(prop));
1419 if (prop[0] == 0) {
1420 int topnd, nd;
1421
1422 printk(KERN_INFO "SunLance: using auto-carrier-detection.\n");
1423
1424 /* Is this found at /options .attributes in all
1425 * Prom versions? XXX
1426 */
1427 topnd = prom_getchild(prom_root_node);
1428
1429 nd = prom_searchsiblings(topnd, "options");
1430 if (!nd)
1431 goto no_link_test;
1432
1433 if (!prom_node_has_property(nd, "tpe-link-test?"))
1434 goto no_link_test;
1435
1436 memset(prop, 0, sizeof(prop));
1437 prom_getstring(nd, "tpe-link-test?", prop,
1438 sizeof(prop));
1439
1440 if (strcmp(prop, "true")) {
1441 printk(KERN_NOTICE "SunLance: warning: overriding option "
1442 "'tpe-link-test?'\n");
1443 printk(KERN_NOTICE "SunLance: warning: mail any problems "
1444 "to ecd@skynet.be\n");
1445 auxio_set_lte(AUXIO_LTE_ON);
1446 }
1447 no_link_test:
1448 lp->auto_select = 1;
1449 lp->tpe = 0;
1450 } else if (!strcmp(prop, "aui")) {
1451 lp->auto_select = 0;
1452 lp->tpe = 0;
1453 } else {
1454 lp->auto_select = 0;
1455 lp->tpe = 1;
1456 }
1457
1458 lp->dregs = ledma->regs;
1459
1460 /* Reset ledma */
1461 csr = sbus_readl(lp->dregs + DMA_CSR);
1462 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1463 udelay(200);
1464 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1465 } else
1466 lp->dregs = NULL;
1467
1468 lp->dev = dev;
1469 SET_MODULE_OWNER(dev);
1470 SET_NETDEV_DEV(dev, &sdev->ofdev.dev);
1471 dev->open = &lance_open;
1472 dev->stop = &lance_close;
1473 dev->hard_start_xmit = &lance_start_xmit;
1474 dev->tx_timeout = &lance_tx_timeout;
1475 dev->watchdog_timeo = 5*HZ;
1476 dev->get_stats = &lance_get_stats;
1477 dev->set_multicast_list = &lance_set_multicast;
1478 dev->ethtool_ops = &sparc_lance_ethtool_ops;
1479
1480 dev->irq = sdev->irqs[0];
1481
1482 dev->dma = 0;
1483
1484 /* We cannot sleep if the chip is busy during a
1485 * multicast list update event, because such events
1486 * can occur from interrupts (ex. IPv6). So we
1487 * use a timer to try again later when necessary. -DaveM
1488 */
1489 init_timer(&lp->multicast_timer);
1490 lp->multicast_timer.data = (unsigned long) dev;
1491 lp->multicast_timer.function = &lance_set_multicast_retry;
1492
1493 if (register_netdev(dev)) {
1494 printk(KERN_ERR "SunLance: Cannot register device.\n");
1495 goto fail;
1496 }
1497
1498 dev_set_drvdata(&sdev->ofdev.dev, lp);
1499
1500 printk(KERN_INFO "%s: LANCE ", dev->name);
1501
1502 for (i = 0; i < 6; i++)
1503 printk("%2.2x%c", dev->dev_addr[i],
1504 i == 5 ? ' ': ':');
1505 printk("\n");
1506
1507 return 0;
1508
1509 fail:
1510 lance_free_hwresources(lp);
1511 free_netdev(dev);
1512 return -ENODEV;
1513 }
1514
1515 /* On 4m, find the associated dma for the lance chip */
1516 static struct sbus_dma * __devinit find_ledma(struct sbus_dev *sdev)
1517 {
1518 struct sbus_dma *p;
1519
1520 for_each_dvma(p) {
1521 if (p->sdev == sdev)
1522 return p;
1523 }
1524 return NULL;
1525 }
1526
1527 #ifdef CONFIG_SUN4
1528
1529 #include <asm/sun4paddr.h>
1530 #include <asm/machines.h>
1531
1532 /* Find all the lance cards on the system and initialize them */
1533 static struct sbus_dev sun4_sdev;
1534 static int __devinit sparc_lance_init(void)
1535 {
1536 if ((idprom->id_machtype == (SM_SUN4|SM_4_330)) ||
1537 (idprom->id_machtype == (SM_SUN4|SM_4_470))) {
1538 memset(&sun4_sdev, 0, sizeof(struct sbus_dev));
1539 sun4_sdev.reg_addrs[0].phys_addr = sun4_eth_physaddr;
1540 sun4_sdev.irqs[0] = 6;
1541 return sparc_lance_probe_one(&sun4_sdev, NULL, NULL);
1542 }
1543 return -ENODEV;
1544 }
1545
1546 static int __exit sunlance_sun4_remove(void)
1547 {
1548 struct lance_private *lp = dev_get_drvdata(&sun4_sdev.ofdev.dev);
1549 struct net_device *net_dev = lp->dev;
1550
1551 unregister_netdev(net_dev);
1552
1553 lance_free_hwresources(lp);
1554
1555 free_netdev(net_dev);
1556
1557 dev_set_drvdata(&sun4_sdev.ofdev.dev, NULL);
1558
1559 return 0;
1560 }
1561
1562 #else /* !CONFIG_SUN4 */
1563
1564 static int __devinit sunlance_sbus_probe(struct of_device *dev, const struct of_device_id *match)
1565 {
1566 struct sbus_dev *sdev = to_sbus_device(&dev->dev);
1567 int err;
1568
1569 if (sdev->parent) {
1570 struct of_device *parent = &sdev->parent->ofdev;
1571
1572 if (!strcmp(parent->node->name, "ledma")) {
1573 struct sbus_dma *ledma = find_ledma(to_sbus_device(&parent->dev));
1574
1575 err = sparc_lance_probe_one(sdev, ledma, NULL);
1576 } else if (!strcmp(parent->node->name, "lebuffer")) {
1577 err = sparc_lance_probe_one(sdev, NULL, to_sbus_device(&parent->dev));
1578 } else
1579 err = sparc_lance_probe_one(sdev, NULL, NULL);
1580 } else
1581 err = sparc_lance_probe_one(sdev, NULL, NULL);
1582
1583 return err;
1584 }
1585
1586 static int __devexit sunlance_sbus_remove(struct of_device *dev)
1587 {
1588 struct lance_private *lp = dev_get_drvdata(&dev->dev);
1589 struct net_device *net_dev = lp->dev;
1590
1591 unregister_netdev(net_dev);
1592
1593 lance_free_hwresources(lp);
1594
1595 free_netdev(net_dev);
1596
1597 dev_set_drvdata(&dev->dev, NULL);
1598
1599 return 0;
1600 }
1601
1602 static struct of_device_id sunlance_sbus_match[] = {
1603 {
1604 .name = "le",
1605 },
1606 {},
1607 };
1608
1609 MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1610
1611 static struct of_platform_driver sunlance_sbus_driver = {
1612 .name = "sunlance",
1613 .match_table = sunlance_sbus_match,
1614 .probe = sunlance_sbus_probe,
1615 .remove = __devexit_p(sunlance_sbus_remove),
1616 };
1617
1618
1619 /* Find all the lance cards on the system and initialize them */
1620 static int __init sparc_lance_init(void)
1621 {
1622 return of_register_driver(&sunlance_sbus_driver, &sbus_bus_type);
1623 }
1624 #endif /* !CONFIG_SUN4 */
1625
1626 static void __exit sparc_lance_exit(void)
1627 {
1628 #ifdef CONFIG_SUN4
1629 sunlance_sun4_remove();
1630 #else
1631 of_unregister_driver(&sunlance_sbus_driver);
1632 #endif
1633 }
1634
1635 module_init(sparc_lance_init);
1636 module_exit(sparc_lance_exit);
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