projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'i7300_idle' into release
[deliverable/linux.git] / drivers / net / sunlance.c
1 /* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
2 * lance.c: Linux/Sparc/Lance driver
3 *
4 * Written 1995, 1996 by Miguel de Icaza
5 * Sources:
6 * The Linux depca driver
7 * The Linux lance driver.
8 * The Linux skeleton driver.
9 * The NetBSD Sparc/Lance driver.
10 * Theo de Raadt (deraadt@openbsd.org)
11 * NCR92C990 Lan Controller manual
12 *
13 * 1.4:
14 * Added support to run with a ledma on the Sun4m
15 *
16 * 1.5:
17 * Added multiple card detection.
18 *
19 * 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
20 * (ecd@skynet.be)
21 *
22 * 5/15/96: auto carrier detection on sun4m by Eddie C. Dost
23 * (ecd@skynet.be)
24 *
25 * 5/17/96: lebuffer on scsi/ether cards now work David S. Miller
26 * (davem@caip.rutgers.edu)
27 *
28 * 5/29/96: override option 'tpe-link-test?', if it is 'false', as
29 * this disables auto carrier detection on sun4m. Eddie C. Dost
30 * (ecd@skynet.be)
31 *
32 * 1.7:
33 * 6/26/96: Bug fix for multiple ledmas, miguel.
34 *
35 * 1.8:
36 * Stole multicast code from depca.c, fixed lance_tx.
37 *
38 * 1.9:
39 * 8/21/96: Fixed the multicast code (Pedro Roque)
40 *
41 * 8/28/96: Send fake packet in lance_open() if auto_select is true,
42 * so we can detect the carrier loss condition in time.
43 * Eddie C. Dost (ecd@skynet.be)
44 *
45 * 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
46 * MNA trap during chksum_partial_copy(). (ecd@skynet.be)
47 *
48 * 11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
49 *
50 * 12/22/96: Don't loop forever in lance_rx() on incomplete packets.
51 * This was the sun4c killer. Shit, stupid bug.
52 * (ecd@skynet.be)
53 *
54 * 1.10:
55 * 1/26/97: Modularize driver. (ecd@skynet.be)
56 *
57 * 1.11:
58 * 12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
59 *
60 * 1.12:
61 * 11/3/99: Fixed SMP race in lance_start_xmit found by davem.
62 * Anton Blanchard (anton@progsoc.uts.edu.au)
63 * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
64 * David S. Miller (davem@redhat.com)
65 * 2.01:
66 * 11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
67 *
68 */
69
70 #undef DEBUG_DRIVER
71
72 static char lancestr[] = "LANCE";
73
74 #include <linux/module.h>
75 #include <linux/kernel.h>
76 #include <linux/types.h>
77 #include <linux/fcntl.h>
78 #include <linux/interrupt.h>
79 #include <linux/ioport.h>
80 #include <linux/in.h>
81 #include <linux/slab.h>
82 #include <linux/string.h>
83 #include <linux/delay.h>
84 #include <linux/init.h>
85 #include <linux/crc32.h>
86 #include <linux/errno.h>
87 #include <linux/socket.h> /* Used for the temporal inet entries and routing */
88 #include <linux/route.h>
89 #include <linux/netdevice.h>
90 #include <linux/etherdevice.h>
91 #include <linux/skbuff.h>
92 #include <linux/ethtool.h>
93 #include <linux/bitops.h>
94 #include <linux/dma-mapping.h>
95 #include <linux/of.h>
96 #include <linux/of_device.h>
97
98 #include <asm/system.h>
99 #include <asm/io.h>
100 #include <asm/dma.h>
101 #include <asm/pgtable.h>
102 #include <asm/byteorder.h> /* Used by the checksum routines */
103 #include <asm/idprom.h>
104 #include <asm/prom.h>
105 #include <asm/auxio.h> /* For tpe-link-test? setting */
106 #include <asm/irq.h>
107
108 #define DRV_NAME "sunlance"
109 #define DRV_VERSION "2.02"
110 #define DRV_RELDATE "8/24/03"
111 #define DRV_AUTHOR "Miguel de Icaza (miguel@nuclecu.unam.mx)"
112
113 static char version[] =
114 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
115
116 MODULE_VERSION(DRV_VERSION);
117 MODULE_AUTHOR(DRV_AUTHOR);
118 MODULE_DESCRIPTION("Sun Lance ethernet driver");
119 MODULE_LICENSE("GPL");
120
121 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
122 #ifndef LANCE_LOG_TX_BUFFERS
123 #define LANCE_LOG_TX_BUFFERS 4
124 #define LANCE_LOG_RX_BUFFERS 4
125 #endif
126
127 #define LE_CSR0 0
128 #define LE_CSR1 1
129 #define LE_CSR2 2
130 #define LE_CSR3 3
131
132 #define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
133
134 #define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
135 #define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
136 #define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
137 #define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
138 #define LE_C0_MERR 0x0800 /* ME: Memory error */
139 #define LE_C0_RINT 0x0400 /* Received interrupt */
140 #define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
141 #define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
142 #define LE_C0_INTR 0x0080 /* Interrupt or error */
143 #define LE_C0_INEA 0x0040 /* Interrupt enable */
144 #define LE_C0_RXON 0x0020 /* Receiver on */
145 #define LE_C0_TXON 0x0010 /* Transmitter on */
146 #define LE_C0_TDMD 0x0008 /* Transmitter demand */
147 #define LE_C0_STOP 0x0004 /* Stop the card */
148 #define LE_C0_STRT 0x0002 /* Start the card */
149 #define LE_C0_INIT 0x0001 /* Init the card */
150
151 #define LE_C3_BSWP 0x4 /* SWAP */
152 #define LE_C3_ACON 0x2 /* ALE Control */
153 #define LE_C3_BCON 0x1 /* Byte control */
154
155 /* Receive message descriptor 1 */
156 #define LE_R1_OWN 0x80 /* Who owns the entry */
157 #define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */
158 #define LE_R1_FRA 0x20 /* FRA: Frame error */
159 #define LE_R1_OFL 0x10 /* OFL: Frame overflow */
160 #define LE_R1_CRC 0x08 /* CRC error */
161 #define LE_R1_BUF 0x04 /* BUF: Buffer error */
162 #define LE_R1_SOP 0x02 /* Start of packet */
163 #define LE_R1_EOP 0x01 /* End of packet */
164 #define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */
165
166 #define LE_T1_OWN 0x80 /* Lance owns the packet */
167 #define LE_T1_ERR 0x40 /* Error summary */
168 #define LE_T1_EMORE 0x10 /* Error: more than one retry needed */
169 #define LE_T1_EONE 0x08 /* Error: one retry needed */
170 #define LE_T1_EDEF 0x04 /* Error: deferred */
171 #define LE_T1_SOP 0x02 /* Start of packet */
172 #define LE_T1_EOP 0x01 /* End of packet */
173 #define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */
174
175 #define LE_T3_BUF 0x8000 /* Buffer error */
176 #define LE_T3_UFL 0x4000 /* Error underflow */
177 #define LE_T3_LCOL 0x1000 /* Error late collision */
178 #define LE_T3_CLOS 0x0800 /* Error carrier loss */
179 #define LE_T3_RTY 0x0400 /* Error retry */
180 #define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
181
182 #define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
183 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
184 #define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
185 #define TX_NEXT(__x) (((__x)+1) & TX_RING_MOD_MASK)
186
187 #define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
188 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
189 #define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
190 #define RX_NEXT(__x) (((__x)+1) & RX_RING_MOD_MASK)
191
192 #define PKT_BUF_SZ 1544
193 #define RX_BUFF_SIZE PKT_BUF_SZ
194 #define TX_BUFF_SIZE PKT_BUF_SZ
195
196 struct lance_rx_desc {
197 u16 rmd0; /* low address of packet */
198 u8 rmd1_bits; /* descriptor bits */
199 u8 rmd1_hadr; /* high address of packet */
200 s16 length; /* This length is 2s complement (negative)!
201 * Buffer length
202 */
203 u16 mblength; /* This is the actual number of bytes received */
204 };
205
206 struct lance_tx_desc {
207 u16 tmd0; /* low address of packet */
208 u8 tmd1_bits; /* descriptor bits */
209 u8 tmd1_hadr; /* high address of packet */
210 s16 length; /* Length is 2s complement (negative)! */
211 u16 misc;
212 };
213
214 /* The LANCE initialization block, described in databook. */
215 /* On the Sparc, this block should be on a DMA region */
216 struct lance_init_block {
217 u16 mode; /* Pre-set mode (reg. 15) */
218 u8 phys_addr[6]; /* Physical ethernet address */
219 u32 filter[2]; /* Multicast filter. */
220
221 /* Receive and transmit ring base, along with extra bits. */
222 u16 rx_ptr; /* receive descriptor addr */
223 u16 rx_len; /* receive len and high addr */
224 u16 tx_ptr; /* transmit descriptor addr */
225 u16 tx_len; /* transmit len and high addr */
226
227 /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
228 struct lance_rx_desc brx_ring[RX_RING_SIZE];
229 struct lance_tx_desc btx_ring[TX_RING_SIZE];
230
231 u8 tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
232 u8 pad[2]; /* align rx_buf for copy_and_sum(). */
233 u8 rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
234 };
235
236 #define libdesc_offset(rt, elem) \
237 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
238
239 #define libbuff_offset(rt, elem) \
240 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
241
242 struct lance_private {
243 void __iomem *lregs; /* Lance RAP/RDP regs. */
244 void __iomem *dregs; /* DMA controller regs. */
245 struct lance_init_block __iomem *init_block_iomem;
246 struct lance_init_block *init_block_mem;
247
248 spinlock_t lock;
249
250 int rx_new, tx_new;
251 int rx_old, tx_old;
252
253 struct of_device *ledma; /* If set this points to ledma */
254 char tpe; /* cable-selection is TPE */
255 char auto_select; /* cable-selection by carrier */
256 char burst_sizes; /* ledma SBus burst sizes */
257 char pio_buffer; /* init block in PIO space? */
258
259 unsigned short busmaster_regval;
260
261 void (*init_ring)(struct net_device *);
262 void (*rx)(struct net_device *);
263 void (*tx)(struct net_device *);
264
265 char *name;
266 dma_addr_t init_block_dvma;
267 struct net_device *dev; /* Backpointer */
268 struct of_device *op;
269 struct of_device *lebuffer;
270 struct timer_list multicast_timer;
271 };
272
273 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
274 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
275 lp->tx_old - lp->tx_new-1)
276
277 /* Lance registers. */
278 #define RDP 0x00UL /* register data port */
279 #define RAP 0x02UL /* register address port */
280 #define LANCE_REG_SIZE 0x04UL
281
282 #define STOP_LANCE(__lp) \
283 do { void __iomem *__base = (__lp)->lregs; \
284 sbus_writew(LE_CSR0, __base + RAP); \
285 sbus_writew(LE_C0_STOP, __base + RDP); \
286 } while (0)
287
288 int sparc_lance_debug = 2;
289
290 /* The Lance uses 24 bit addresses */
291 /* On the Sun4c the DVMA will provide the remaining bytes for us */
292 /* On the Sun4m we have to instruct the ledma to provide them */
293 /* Even worse, on scsi/ether SBUS cards, the init block and the
294 * transmit/receive buffers are addresses as offsets from absolute
295 * zero on the lebuffer PIO area. -DaveM
296 */
297
298 #define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
299
300 /* Load the CSR registers */
301 static void load_csrs(struct lance_private *lp)
302 {
303 u32 leptr;
304
305 if (lp->pio_buffer)
306 leptr = 0;
307 else
308 leptr = LANCE_ADDR(lp->init_block_dvma);
309
310 sbus_writew(LE_CSR1, lp->lregs + RAP);
311 sbus_writew(leptr & 0xffff, lp->lregs + RDP);
312 sbus_writew(LE_CSR2, lp->lregs + RAP);
313 sbus_writew(leptr >> 16, lp->lregs + RDP);
314 sbus_writew(LE_CSR3, lp->lregs + RAP);
315 sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
316
317 /* Point back to csr0 */
318 sbus_writew(LE_CSR0, lp->lregs + RAP);
319 }
320
321 /* Setup the Lance Rx and Tx rings */
322 static void lance_init_ring_dvma(struct net_device *dev)
323 {
324 struct lance_private *lp = netdev_priv(dev);
325 struct lance_init_block *ib = lp->init_block_mem;
326 dma_addr_t aib = lp->init_block_dvma;
327 __u32 leptr;
328 int i;
329
330 /* Lock out other processes while setting up hardware */
331 netif_stop_queue(dev);
332 lp->rx_new = lp->tx_new = 0;
333 lp->rx_old = lp->tx_old = 0;
334
335 /* Copy the ethernet address to the lance init block
336 * Note that on the sparc you need to swap the ethernet address.
337 */
338 ib->phys_addr [0] = dev->dev_addr [1];
339 ib->phys_addr [1] = dev->dev_addr [0];
340 ib->phys_addr [2] = dev->dev_addr [3];
341 ib->phys_addr [3] = dev->dev_addr [2];
342 ib->phys_addr [4] = dev->dev_addr [5];
343 ib->phys_addr [5] = dev->dev_addr [4];
344
345 /* Setup the Tx ring entries */
346 for (i = 0; i <= TX_RING_SIZE; i++) {
347 leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
348 ib->btx_ring [i].tmd0 = leptr;
349 ib->btx_ring [i].tmd1_hadr = leptr >> 16;
350 ib->btx_ring [i].tmd1_bits = 0;
351 ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */
352 ib->btx_ring [i].misc = 0;
353 }
354
355 /* Setup the Rx ring entries */
356 for (i = 0; i < RX_RING_SIZE; i++) {
357 leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
358
359 ib->brx_ring [i].rmd0 = leptr;
360 ib->brx_ring [i].rmd1_hadr = leptr >> 16;
361 ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
362 ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000;
363 ib->brx_ring [i].mblength = 0;
364 }
365
366 /* Setup the initialization block */
367
368 /* Setup rx descriptor pointer */
369 leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
370 ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
371 ib->rx_ptr = leptr;
372
373 /* Setup tx descriptor pointer */
374 leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
375 ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
376 ib->tx_ptr = leptr;
377 }
378
379 static void lance_init_ring_pio(struct net_device *dev)
380 {
381 struct lance_private *lp = netdev_priv(dev);
382 struct lance_init_block __iomem *ib = lp->init_block_iomem;
383 u32 leptr;
384 int i;
385
386 /* Lock out other processes while setting up hardware */
387 netif_stop_queue(dev);
388 lp->rx_new = lp->tx_new = 0;
389 lp->rx_old = lp->tx_old = 0;
390
391 /* Copy the ethernet address to the lance init block
392 * Note that on the sparc you need to swap the ethernet address.
393 */
394 sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
395 sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
396 sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
397 sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
398 sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
399 sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
400
401 /* Setup the Tx ring entries */
402 for (i = 0; i <= TX_RING_SIZE; i++) {
403 leptr = libbuff_offset(tx_buf, i);
404 sbus_writew(leptr, &ib->btx_ring [i].tmd0);
405 sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
406 sbus_writeb(0, &ib->btx_ring [i].tmd1_bits);
407
408 /* The ones required by tmd2 */
409 sbus_writew(0xf000, &ib->btx_ring [i].length);
410 sbus_writew(0, &ib->btx_ring [i].misc);
411 }
412
413 /* Setup the Rx ring entries */
414 for (i = 0; i < RX_RING_SIZE; i++) {
415 leptr = libbuff_offset(rx_buf, i);
416
417 sbus_writew(leptr, &ib->brx_ring [i].rmd0);
418 sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
419 sbus_writeb(LE_R1_OWN, &ib->brx_ring [i].rmd1_bits);
420 sbus_writew(-RX_BUFF_SIZE|0xf000,
421 &ib->brx_ring [i].length);
422 sbus_writew(0, &ib->brx_ring [i].mblength);
423 }
424
425 /* Setup the initialization block */
426
427 /* Setup rx descriptor pointer */
428 leptr = libdesc_offset(brx_ring, 0);
429 sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
430 &ib->rx_len);
431 sbus_writew(leptr, &ib->rx_ptr);
432
433 /* Setup tx descriptor pointer */
434 leptr = libdesc_offset(btx_ring, 0);
435 sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
436 &ib->tx_len);
437 sbus_writew(leptr, &ib->tx_ptr);
438 }
439
440 static void init_restart_ledma(struct lance_private *lp)
441 {
442 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
443
444 if (!(csr & DMA_HNDL_ERROR)) {
445 /* E-Cache draining */
446 while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
447 barrier();
448 }
449
450 csr = sbus_readl(lp->dregs + DMA_CSR);
451 csr &= ~DMA_E_BURSTS;
452 if (lp->burst_sizes & DMA_BURST32)
453 csr |= DMA_E_BURST32;
454 else
455 csr |= DMA_E_BURST16;
456
457 csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
458
459 if (lp->tpe)
460 csr |= DMA_EN_ENETAUI;
461 else
462 csr &= ~DMA_EN_ENETAUI;
463 udelay(20);
464 sbus_writel(csr, lp->dregs + DMA_CSR);
465 udelay(200);
466 }
467
468 static int init_restart_lance(struct lance_private *lp)
469 {
470 u16 regval = 0;
471 int i;
472
473 if (lp->dregs)
474 init_restart_ledma(lp);
475
476 sbus_writew(LE_CSR0, lp->lregs + RAP);
477 sbus_writew(LE_C0_INIT, lp->lregs + RDP);
478
479 /* Wait for the lance to complete initialization */
480 for (i = 0; i < 100; i++) {
481 regval = sbus_readw(lp->lregs + RDP);
482
483 if (regval & (LE_C0_ERR | LE_C0_IDON))
484 break;
485 barrier();
486 }
487 if (i == 100 || (regval & LE_C0_ERR)) {
488 printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
489 i, regval);
490 if (lp->dregs)
491 printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
492 return -1;
493 }
494
495 /* Clear IDON by writing a "1", enable interrupts and start lance */
496 sbus_writew(LE_C0_IDON, lp->lregs + RDP);
497 sbus_writew(LE_C0_INEA | LE_C0_STRT, lp->lregs + RDP);
498
499 if (lp->dregs) {
500 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
501
502 csr |= DMA_INT_ENAB;
503 sbus_writel(csr, lp->dregs + DMA_CSR);
504 }
505
506 return 0;
507 }
508
509 static void lance_rx_dvma(struct net_device *dev)
510 {
511 struct lance_private *lp = netdev_priv(dev);
512 struct lance_init_block *ib = lp->init_block_mem;
513 struct lance_rx_desc *rd;
514 u8 bits;
515 int len, entry = lp->rx_new;
516 struct sk_buff *skb;
517
518 for (rd = &ib->brx_ring [entry];
519 !((bits = rd->rmd1_bits) & LE_R1_OWN);
520 rd = &ib->brx_ring [entry]) {
521
522 /* We got an incomplete frame? */
523 if ((bits & LE_R1_POK) != LE_R1_POK) {
524 dev->stats.rx_over_errors++;
525 dev->stats.rx_errors++;
526 } else if (bits & LE_R1_ERR) {
527 /* Count only the end frame as a rx error,
528 * not the beginning
529 */
530 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
531 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
532 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
533 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
534 if (bits & LE_R1_EOP) dev->stats.rx_errors++;
535 } else {
536 len = (rd->mblength & 0xfff) - 4;
537 skb = dev_alloc_skb(len + 2);
538
539 if (skb == NULL) {
540 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
541 dev->name);
542 dev->stats.rx_dropped++;
543 rd->mblength = 0;
544 rd->rmd1_bits = LE_R1_OWN;
545 lp->rx_new = RX_NEXT(entry);
546 return;
547 }
548
549 dev->stats.rx_bytes += len;
550
551 skb_reserve(skb, 2); /* 16 byte align */
552 skb_put(skb, len); /* make room */
553 skb_copy_to_linear_data(skb,
554 (unsigned char *)&(ib->rx_buf [entry][0]),
555 len);
556 skb->protocol = eth_type_trans(skb, dev);
557 netif_rx(skb);
558 dev->last_rx = jiffies;
559 dev->stats.rx_packets++;
560 }
561
562 /* Return the packet to the pool */
563 rd->mblength = 0;
564 rd->rmd1_bits = LE_R1_OWN;
565 entry = RX_NEXT(entry);
566 }
567
568 lp->rx_new = entry;
569 }
570
571 static void lance_tx_dvma(struct net_device *dev)
572 {
573 struct lance_private *lp = netdev_priv(dev);
574 struct lance_init_block *ib = lp->init_block_mem;
575 int i, j;
576
577 spin_lock(&lp->lock);
578
579 j = lp->tx_old;
580 for (i = j; i != lp->tx_new; i = j) {
581 struct lance_tx_desc *td = &ib->btx_ring [i];
582 u8 bits = td->tmd1_bits;
583
584 /* If we hit a packet not owned by us, stop */
585 if (bits & LE_T1_OWN)
586 break;
587
588 if (bits & LE_T1_ERR) {
589 u16 status = td->misc;
590
591 dev->stats.tx_errors++;
592 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
593 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
594
595 if (status & LE_T3_CLOS) {
596 dev->stats.tx_carrier_errors++;
597 if (lp->auto_select) {
598 lp->tpe = 1 - lp->tpe;
599 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
600 dev->name, lp->tpe?"TPE":"AUI");
601 STOP_LANCE(lp);
602 lp->init_ring(dev);
603 load_csrs(lp);
604 init_restart_lance(lp);
605 goto out;
606 }
607 }
608
609 /* Buffer errors and underflows turn off the
610 * transmitter, restart the adapter.
611 */
612 if (status & (LE_T3_BUF|LE_T3_UFL)) {
613 dev->stats.tx_fifo_errors++;
614
615 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
616 dev->name);
617 STOP_LANCE(lp);
618 lp->init_ring(dev);
619 load_csrs(lp);
620 init_restart_lance(lp);
621 goto out;
622 }
623 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
624 /*
625 * So we don't count the packet more than once.
626 */
627 td->tmd1_bits = bits & ~(LE_T1_POK);
628
629 /* One collision before packet was sent. */
630 if (bits & LE_T1_EONE)
631 dev->stats.collisions++;
632
633 /* More than one collision, be optimistic. */
634 if (bits & LE_T1_EMORE)
635 dev->stats.collisions += 2;
636
637 dev->stats.tx_packets++;
638 }
639
640 j = TX_NEXT(j);
641 }
642 lp->tx_old = j;
643 out:
644 if (netif_queue_stopped(dev) &&
645 TX_BUFFS_AVAIL > 0)
646 netif_wake_queue(dev);
647
648 spin_unlock(&lp->lock);
649 }
650
651 static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
652 {
653 u16 *p16 = (u16 *) skb->data;
654 u32 *p32;
655 u8 *p8;
656 void __iomem *pbuf = piobuf;
657
658 /* We know here that both src and dest are on a 16bit boundary. */
659 *p16++ = sbus_readw(pbuf);
660 p32 = (u32 *) p16;
661 pbuf += 2;
662 len -= 2;
663
664 while (len >= 4) {
665 *p32++ = sbus_readl(pbuf);
666 pbuf += 4;
667 len -= 4;
668 }
669 p8 = (u8 *) p32;
670 if (len >= 2) {
671 p16 = (u16 *) p32;
672 *p16++ = sbus_readw(pbuf);
673 pbuf += 2;
674 len -= 2;
675 p8 = (u8 *) p16;
676 }
677 if (len >= 1)
678 *p8 = sbus_readb(pbuf);
679 }
680
681 static void lance_rx_pio(struct net_device *dev)
682 {
683 struct lance_private *lp = netdev_priv(dev);
684 struct lance_init_block __iomem *ib = lp->init_block_iomem;
685 struct lance_rx_desc __iomem *rd;
686 unsigned char bits;
687 int len, entry;
688 struct sk_buff *skb;
689
690 entry = lp->rx_new;
691 for (rd = &ib->brx_ring [entry];
692 !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
693 rd = &ib->brx_ring [entry]) {
694
695 /* We got an incomplete frame? */
696 if ((bits & LE_R1_POK) != LE_R1_POK) {
697 dev->stats.rx_over_errors++;
698 dev->stats.rx_errors++;
699 } else if (bits & LE_R1_ERR) {
700 /* Count only the end frame as a rx error,
701 * not the beginning
702 */
703 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
704 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
705 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
706 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
707 if (bits & LE_R1_EOP) dev->stats.rx_errors++;
708 } else {
709 len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
710 skb = dev_alloc_skb(len + 2);
711
712 if (skb == NULL) {
713 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
714 dev->name);
715 dev->stats.rx_dropped++;
716 sbus_writew(0, &rd->mblength);
717 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
718 lp->rx_new = RX_NEXT(entry);
719 return;
720 }
721
722 dev->stats.rx_bytes += len;
723
724 skb_reserve (skb, 2); /* 16 byte align */
725 skb_put(skb, len); /* make room */
726 lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
727 skb->protocol = eth_type_trans(skb, dev);
728 netif_rx(skb);
729 dev->last_rx = jiffies;
730 dev->stats.rx_packets++;
731 }
732
733 /* Return the packet to the pool */
734 sbus_writew(0, &rd->mblength);
735 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
736 entry = RX_NEXT(entry);
737 }
738
739 lp->rx_new = entry;
740 }
741
742 static void lance_tx_pio(struct net_device *dev)
743 {
744 struct lance_private *lp = netdev_priv(dev);
745 struct lance_init_block __iomem *ib = lp->init_block_iomem;
746 int i, j;
747
748 spin_lock(&lp->lock);
749
750 j = lp->tx_old;
751 for (i = j; i != lp->tx_new; i = j) {
752 struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
753 u8 bits = sbus_readb(&td->tmd1_bits);
754
755 /* If we hit a packet not owned by us, stop */
756 if (bits & LE_T1_OWN)
757 break;
758
759 if (bits & LE_T1_ERR) {
760 u16 status = sbus_readw(&td->misc);
761
762 dev->stats.tx_errors++;
763 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
764 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
765
766 if (status & LE_T3_CLOS) {
767 dev->stats.tx_carrier_errors++;
768 if (lp->auto_select) {
769 lp->tpe = 1 - lp->tpe;
770 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
771 dev->name, lp->tpe?"TPE":"AUI");
772 STOP_LANCE(lp);
773 lp->init_ring(dev);
774 load_csrs(lp);
775 init_restart_lance(lp);
776 goto out;
777 }
778 }
779
780 /* Buffer errors and underflows turn off the
781 * transmitter, restart the adapter.
782 */
783 if (status & (LE_T3_BUF|LE_T3_UFL)) {
784 dev->stats.tx_fifo_errors++;
785
786 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
787 dev->name);
788 STOP_LANCE(lp);
789 lp->init_ring(dev);
790 load_csrs(lp);
791 init_restart_lance(lp);
792 goto out;
793 }
794 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
795 /*
796 * So we don't count the packet more than once.
797 */
798 sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
799
800 /* One collision before packet was sent. */
801 if (bits & LE_T1_EONE)
802 dev->stats.collisions++;
803
804 /* More than one collision, be optimistic. */
805 if (bits & LE_T1_EMORE)
806 dev->stats.collisions += 2;
807
808 dev->stats.tx_packets++;
809 }
810
811 j = TX_NEXT(j);
812 }
813 lp->tx_old = j;
814
815 if (netif_queue_stopped(dev) &&
816 TX_BUFFS_AVAIL > 0)
817 netif_wake_queue(dev);
818 out:
819 spin_unlock(&lp->lock);
820 }
821
822 static irqreturn_t lance_interrupt(int irq, void *dev_id)
823 {
824 struct net_device *dev = dev_id;
825 struct lance_private *lp = netdev_priv(dev);
826 int csr0;
827
828 sbus_writew(LE_CSR0, lp->lregs + RAP);
829 csr0 = sbus_readw(lp->lregs + RDP);
830
831 /* Acknowledge all the interrupt sources ASAP */
832 sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
833 lp->lregs + RDP);
834
835 if ((csr0 & LE_C0_ERR) != 0) {
836 /* Clear the error condition */
837 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
838 LE_C0_CERR | LE_C0_MERR),
839 lp->lregs + RDP);
840 }
841
842 if (csr0 & LE_C0_RINT)
843 lp->rx(dev);
844
845 if (csr0 & LE_C0_TINT)
846 lp->tx(dev);
847
848 if (csr0 & LE_C0_BABL)
849 dev->stats.tx_errors++;
850
851 if (csr0 & LE_C0_MISS)
852 dev->stats.rx_errors++;
853
854 if (csr0 & LE_C0_MERR) {
855 if (lp->dregs) {
856 u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
857
858 printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
859 dev->name, csr0, addr & 0xffffff);
860 } else {
861 printk(KERN_ERR "%s: Memory error, status %04x\n",
862 dev->name, csr0);
863 }
864
865 sbus_writew(LE_C0_STOP, lp->lregs + RDP);
866
867 if (lp->dregs) {
868 u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
869
870 dma_csr |= DMA_FIFO_INV;
871 sbus_writel(dma_csr, lp->dregs + DMA_CSR);
872 }
873
874 lp->init_ring(dev);
875 load_csrs(lp);
876 init_restart_lance(lp);
877 netif_wake_queue(dev);
878 }
879
880 sbus_writew(LE_C0_INEA, lp->lregs + RDP);
881
882 return IRQ_HANDLED;
883 }
884
885 /* Build a fake network packet and send it to ourselves. */
886 static void build_fake_packet(struct lance_private *lp)
887 {
888 struct net_device *dev = lp->dev;
889 int i, entry;
890
891 entry = lp->tx_new & TX_RING_MOD_MASK;
892 if (lp->pio_buffer) {
893 struct lance_init_block __iomem *ib = lp->init_block_iomem;
894 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
895 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
896 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
897 sbus_writew(0, &packet[i]);
898 for (i = 0; i < 6; i++) {
899 sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
900 sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
901 }
902 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
903 sbus_writew(0, &ib->btx_ring[entry].misc);
904 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
905 } else {
906 struct lance_init_block *ib = lp->init_block_mem;
907 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
908 struct ethhdr *eth = (struct ethhdr *) packet;
909 memset(packet, 0, ETH_ZLEN);
910 for (i = 0; i < 6; i++) {
911 eth->h_dest[i] = dev->dev_addr[i];
912 eth->h_source[i] = dev->dev_addr[i];
913 }
914 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
915 ib->btx_ring[entry].misc = 0;
916 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
917 }
918 lp->tx_new = TX_NEXT(entry);
919 }
920
921 static int lance_open(struct net_device *dev)
922 {
923 struct lance_private *lp = netdev_priv(dev);
924 int status = 0;
925
926 STOP_LANCE(lp);
927
928 if (request_irq(dev->irq, &lance_interrupt, IRQF_SHARED,
929 lancestr, (void *) dev)) {
930 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
931 return -EAGAIN;
932 }
933
934 /* On the 4m, setup the ledma to provide the upper bits for buffers */
935 if (lp->dregs) {
936 u32 regval = lp->init_block_dvma & 0xff000000;
937
938 sbus_writel(regval, lp->dregs + DMA_TEST);
939 }
940
941 /* Set mode and clear multicast filter only at device open,
942 * so that lance_init_ring() called at any error will not
943 * forget multicast filters.
944 *
945 * BTW it is common bug in all lance drivers! --ANK
946 */
947 if (lp->pio_buffer) {
948 struct lance_init_block __iomem *ib = lp->init_block_iomem;
949 sbus_writew(0, &ib->mode);
950 sbus_writel(0, &ib->filter[0]);
951 sbus_writel(0, &ib->filter[1]);
952 } else {
953 struct lance_init_block *ib = lp->init_block_mem;
954 ib->mode = 0;
955 ib->filter [0] = 0;
956 ib->filter [1] = 0;
957 }
958
959 lp->init_ring(dev);
960 load_csrs(lp);
961
962 netif_start_queue(dev);
963
964 status = init_restart_lance(lp);
965 if (!status && lp->auto_select) {
966 build_fake_packet(lp);
967 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
968 }
969
970 return status;
971 }
972
973 static int lance_close(struct net_device *dev)
974 {
975 struct lance_private *lp = netdev_priv(dev);
976
977 netif_stop_queue(dev);
978 del_timer_sync(&lp->multicast_timer);
979
980 STOP_LANCE(lp);
981
982 free_irq(dev->irq, (void *) dev);
983 return 0;
984 }
985
986 static int lance_reset(struct net_device *dev)
987 {
988 struct lance_private *lp = netdev_priv(dev);
989 int status;
990
991 STOP_LANCE(lp);
992
993 /* On the 4m, reset the dma too */
994 if (lp->dregs) {
995 u32 csr, addr;
996
997 printk(KERN_ERR "resetting ledma\n");
998 csr = sbus_readl(lp->dregs + DMA_CSR);
999 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1000 udelay(200);
1001 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1002
1003 addr = lp->init_block_dvma & 0xff000000;
1004 sbus_writel(addr, lp->dregs + DMA_TEST);
1005 }
1006 lp->init_ring(dev);
1007 load_csrs(lp);
1008 dev->trans_start = jiffies;
1009 status = init_restart_lance(lp);
1010 return status;
1011 }
1012
1013 static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1014 {
1015 void __iomem *piobuf = dest;
1016 u32 *p32;
1017 u16 *p16;
1018 u8 *p8;
1019
1020 switch ((unsigned long)src & 0x3) {
1021 case 0:
1022 p32 = (u32 *) src;
1023 while (len >= 4) {
1024 sbus_writel(*p32, piobuf);
1025 p32++;
1026 piobuf += 4;
1027 len -= 4;
1028 }
1029 src = (char *) p32;
1030 break;
1031 case 1:
1032 case 3:
1033 p8 = (u8 *) src;
1034 while (len >= 4) {
1035 u32 val;
1036
1037 val = p8[0] << 24;
1038 val |= p8[1] << 16;
1039 val |= p8[2] << 8;
1040 val |= p8[3];
1041 sbus_writel(val, piobuf);
1042 p8 += 4;
1043 piobuf += 4;
1044 len -= 4;
1045 }
1046 src = (char *) p8;
1047 break;
1048 case 2:
1049 p16 = (u16 *) src;
1050 while (len >= 4) {
1051 u32 val = p16[0]<<16 | p16[1];
1052 sbus_writel(val, piobuf);
1053 p16 += 2;
1054 piobuf += 4;
1055 len -= 4;
1056 }
1057 src = (char *) p16;
1058 break;
1059 };
1060 if (len >= 2) {
1061 u16 val = src[0] << 8 | src[1];
1062 sbus_writew(val, piobuf);
1063 src += 2;
1064 piobuf += 2;
1065 len -= 2;
1066 }
1067 if (len >= 1)
1068 sbus_writeb(src[0], piobuf);
1069 }
1070
1071 static void lance_piozero(void __iomem *dest, int len)
1072 {
1073 void __iomem *piobuf = dest;
1074
1075 if ((unsigned long)piobuf & 1) {
1076 sbus_writeb(0, piobuf);
1077 piobuf += 1;
1078 len -= 1;
1079 if (len == 0)
1080 return;
1081 }
1082 if (len == 1) {
1083 sbus_writeb(0, piobuf);
1084 return;
1085 }
1086 if ((unsigned long)piobuf & 2) {
1087 sbus_writew(0, piobuf);
1088 piobuf += 2;
1089 len -= 2;
1090 if (len == 0)
1091 return;
1092 }
1093 while (len >= 4) {
1094 sbus_writel(0, piobuf);
1095 piobuf += 4;
1096 len -= 4;
1097 }
1098 if (len >= 2) {
1099 sbus_writew(0, piobuf);
1100 piobuf += 2;
1101 len -= 2;
1102 }
1103 if (len >= 1)
1104 sbus_writeb(0, piobuf);
1105 }
1106
1107 static void lance_tx_timeout(struct net_device *dev)
1108 {
1109 struct lance_private *lp = netdev_priv(dev);
1110
1111 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1112 dev->name, sbus_readw(lp->lregs + RDP));
1113 lance_reset(dev);
1114 netif_wake_queue(dev);
1115 }
1116
1117 static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1118 {
1119 struct lance_private *lp = netdev_priv(dev);
1120 int entry, skblen, len;
1121
1122 skblen = skb->len;
1123
1124 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1125
1126 spin_lock_irq(&lp->lock);
1127
1128 dev->stats.tx_bytes += len;
1129
1130 entry = lp->tx_new & TX_RING_MOD_MASK;
1131 if (lp->pio_buffer) {
1132 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1133 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1134 sbus_writew(0, &ib->btx_ring[entry].misc);
1135 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1136 if (len != skblen)
1137 lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1138 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1139 } else {
1140 struct lance_init_block *ib = lp->init_block_mem;
1141 ib->btx_ring [entry].length = (-len) | 0xf000;
1142 ib->btx_ring [entry].misc = 0;
1143 skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1144 if (len != skblen)
1145 memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1146 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1147 }
1148
1149 lp->tx_new = TX_NEXT(entry);
1150
1151 if (TX_BUFFS_AVAIL <= 0)
1152 netif_stop_queue(dev);
1153
1154 /* Kick the lance: transmit now */
1155 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1156
1157 /* Read back CSR to invalidate the E-Cache.
1158 * This is needed, because DMA_DSBL_WR_INV is set.
1159 */
1160 if (lp->dregs)
1161 sbus_readw(lp->lregs + RDP);
1162
1163 spin_unlock_irq(&lp->lock);
1164
1165 dev->trans_start = jiffies;
1166 dev_kfree_skb(skb);
1167
1168 return 0;
1169 }
1170
1171 /* taken from the depca driver */
1172 static void lance_load_multicast(struct net_device *dev)
1173 {
1174 struct lance_private *lp = netdev_priv(dev);
1175 struct dev_mc_list *dmi = dev->mc_list;
1176 char *addrs;
1177 int i;
1178 u32 crc;
1179 u32 val;
1180
1181 /* set all multicast bits */
1182 if (dev->flags & IFF_ALLMULTI)
1183 val = ~0;
1184 else
1185 val = 0;
1186
1187 if (lp->pio_buffer) {
1188 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1189 sbus_writel(val, &ib->filter[0]);
1190 sbus_writel(val, &ib->filter[1]);
1191 } else {
1192 struct lance_init_block *ib = lp->init_block_mem;
1193 ib->filter [0] = val;
1194 ib->filter [1] = val;
1195 }
1196
1197 if (dev->flags & IFF_ALLMULTI)
1198 return;
1199
1200 /* Add addresses */
1201 for (i = 0; i < dev->mc_count; i++) {
1202 addrs = dmi->dmi_addr;
1203 dmi = dmi->next;
1204
1205 /* multicast address? */
1206 if (!(*addrs & 1))
1207 continue;
1208 crc = ether_crc_le(6, addrs);
1209 crc = crc >> 26;
1210 if (lp->pio_buffer) {
1211 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1212 u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1213 u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1214 tmp |= 1 << (crc & 0xf);
1215 sbus_writew(tmp, &mcast_table[crc>>4]);
1216 } else {
1217 struct lance_init_block *ib = lp->init_block_mem;
1218 u16 *mcast_table = (u16 *) &ib->filter;
1219 mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1220 }
1221 }
1222 }
1223
1224 static void lance_set_multicast(struct net_device *dev)
1225 {
1226 struct lance_private *lp = netdev_priv(dev);
1227 struct lance_init_block *ib_mem = lp->init_block_mem;
1228 struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1229 u16 mode;
1230
1231 if (!netif_running(dev))
1232 return;
1233
1234 if (lp->tx_old != lp->tx_new) {
1235 mod_timer(&lp->multicast_timer, jiffies + 4);
1236 netif_wake_queue(dev);
1237 return;
1238 }
1239
1240 netif_stop_queue(dev);
1241
1242 STOP_LANCE(lp);
1243 lp->init_ring(dev);
1244
1245 if (lp->pio_buffer)
1246 mode = sbus_readw(&ib_iomem->mode);
1247 else
1248 mode = ib_mem->mode;
1249 if (dev->flags & IFF_PROMISC) {
1250 mode |= LE_MO_PROM;
1251 if (lp->pio_buffer)
1252 sbus_writew(mode, &ib_iomem->mode);
1253 else
1254 ib_mem->mode = mode;
1255 } else {
1256 mode &= ~LE_MO_PROM;
1257 if (lp->pio_buffer)
1258 sbus_writew(mode, &ib_iomem->mode);
1259 else
1260 ib_mem->mode = mode;
1261 lance_load_multicast(dev);
1262 }
1263 load_csrs(lp);
1264 init_restart_lance(lp);
1265 netif_wake_queue(dev);
1266 }
1267
1268 static void lance_set_multicast_retry(unsigned long _opaque)
1269 {
1270 struct net_device *dev = (struct net_device *) _opaque;
1271
1272 lance_set_multicast(dev);
1273 }
1274
1275 static void lance_free_hwresources(struct lance_private *lp)
1276 {
1277 if (lp->lregs)
1278 of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
1279 if (lp->dregs) {
1280 struct of_device *ledma = lp->ledma;
1281
1282 of_iounmap(&ledma->resource[0], lp->dregs,
1283 resource_size(&ledma->resource[0]));
1284 }
1285 if (lp->init_block_iomem) {
1286 of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
1287 sizeof(struct lance_init_block));
1288 } else if (lp->init_block_mem) {
1289 dma_free_coherent(&lp->op->dev,
1290 sizeof(struct lance_init_block),
1291 lp->init_block_mem,
1292 lp->init_block_dvma);
1293 }
1294 }
1295
1296 /* Ethtool support... */
1297 static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1298 {
1299 strcpy(info->driver, "sunlance");
1300 strcpy(info->version, "2.02");
1301 }
1302
1303 static u32 sparc_lance_get_link(struct net_device *dev)
1304 {
1305 /* We really do not keep track of this, but this
1306 * is better than not reporting anything at all.
1307 */
1308 return 1;
1309 }
1310
1311 static const struct ethtool_ops sparc_lance_ethtool_ops = {
1312 .get_drvinfo = sparc_lance_get_drvinfo,
1313 .get_link = sparc_lance_get_link,
1314 };
1315
1316 static int __devinit sparc_lance_probe_one(struct of_device *op,
1317 struct of_device *ledma,
1318 struct of_device *lebuffer)
1319 {
1320 struct device_node *dp = op->node;
1321 static unsigned version_printed;
1322 struct lance_private *lp;
1323 struct net_device *dev;
1324 DECLARE_MAC_BUF(mac);
1325 int i;
1326
1327 dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1328 if (!dev)
1329 return -ENOMEM;
1330
1331 lp = netdev_priv(dev);
1332
1333 if (sparc_lance_debug && version_printed++ == 0)
1334 printk (KERN_INFO "%s", version);
1335
1336 spin_lock_init(&lp->lock);
1337
1338 /* Copy the IDPROM ethernet address to the device structure, later we
1339 * will copy the address in the device structure to the lance
1340 * initialization block.
1341 */
1342 for (i = 0; i < 6; i++)
1343 dev->dev_addr[i] = idprom->id_ethaddr[i];
1344
1345 /* Get the IO region */
1346 lp->lregs = of_ioremap(&op->resource[0], 0,
1347 LANCE_REG_SIZE, lancestr);
1348 if (!lp->lregs) {
1349 printk(KERN_ERR "SunLance: Cannot map registers.\n");
1350 goto fail;
1351 }
1352
1353 lp->ledma = ledma;
1354 if (lp->ledma) {
1355 lp->dregs = of_ioremap(&ledma->resource[0], 0,
1356 resource_size(&ledma->resource[0]),
1357 "ledma");
1358 if (!lp->dregs) {
1359 printk(KERN_ERR "SunLance: Cannot map "
1360 "ledma registers.\n");
1361 goto fail;
1362 }
1363 }
1364
1365 lp->op = op;
1366 lp->lebuffer = lebuffer;
1367 if (lebuffer) {
1368 /* sanity check */
1369 if (lebuffer->resource[0].start & 7) {
1370 printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1371 goto fail;
1372 }
1373 lp->init_block_iomem =
1374 of_ioremap(&lebuffer->resource[0], 0,
1375 sizeof(struct lance_init_block), "lebuffer");
1376 if (!lp->init_block_iomem) {
1377 printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1378 goto fail;
1379 }
1380 lp->init_block_dvma = 0;
1381 lp->pio_buffer = 1;
1382 lp->init_ring = lance_init_ring_pio;
1383 lp->rx = lance_rx_pio;
1384 lp->tx = lance_tx_pio;
1385 } else {
1386 lp->init_block_mem =
1387 dma_alloc_coherent(&op->dev,
1388 sizeof(struct lance_init_block),
1389 &lp->init_block_dvma, GFP_ATOMIC);
1390 if (!lp->init_block_mem) {
1391 printk(KERN_ERR "SunLance: Cannot allocate consistent DMA memory.\n");
1392 goto fail;
1393 }
1394 lp->pio_buffer = 0;
1395 lp->init_ring = lance_init_ring_dvma;
1396 lp->rx = lance_rx_dvma;
1397 lp->tx = lance_tx_dvma;
1398 }
1399 lp->busmaster_regval = of_getintprop_default(dp, "busmaster-regval",
1400 (LE_C3_BSWP |
1401 LE_C3_ACON |
1402 LE_C3_BCON));
1403
1404 lp->name = lancestr;
1405
1406 lp->burst_sizes = 0;
1407 if (lp->ledma) {
1408 struct device_node *ledma_dp = ledma->node;
1409 struct device_node *sbus_dp;
1410 unsigned int sbmask;
1411 const char *prop;
1412 u32 csr;
1413
1414 /* Find burst-size property for ledma */
1415 lp->burst_sizes = of_getintprop_default(ledma_dp,
1416 "burst-sizes", 0);
1417
1418 /* ledma may be capable of fast bursts, but sbus may not. */
1419 sbus_dp = ledma_dp->parent;
1420 sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
1421 DMA_BURSTBITS);
1422 lp->burst_sizes &= sbmask;
1423
1424 /* Get the cable-selection property */
1425 prop = of_get_property(ledma_dp, "cable-selection", NULL);
1426 if (!prop || prop[0] == '\0') {
1427 struct device_node *nd;
1428
1429 printk(KERN_INFO "SunLance: using "
1430 "auto-carrier-detection.\n");
1431
1432 nd = of_find_node_by_path("/options");
1433 if (!nd)
1434 goto no_link_test;
1435
1436 prop = of_get_property(nd, "tpe-link-test?", NULL);
1437 if (!prop)
1438 goto no_link_test;
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 /* Reset ledma */
1459 csr = sbus_readl(lp->dregs + DMA_CSR);
1460 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1461 udelay(200);
1462 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1463 } else
1464 lp->dregs = NULL;
1465
1466 lp->dev = dev;
1467 SET_NETDEV_DEV(dev, &op->dev);
1468 dev->open = &lance_open;
1469 dev->stop = &lance_close;
1470 dev->hard_start_xmit = &lance_start_xmit;
1471 dev->tx_timeout = &lance_tx_timeout;
1472 dev->watchdog_timeo = 5*HZ;
1473 dev->set_multicast_list = &lance_set_multicast;
1474 dev->ethtool_ops = &sparc_lance_ethtool_ops;
1475
1476 dev->irq = op->irqs[0];
1477
1478 /* We cannot sleep if the chip is busy during a
1479 * multicast list update event, because such events
1480 * can occur from interrupts (ex. IPv6). So we
1481 * use a timer to try again later when necessary. -DaveM
1482 */
1483 init_timer(&lp->multicast_timer);
1484 lp->multicast_timer.data = (unsigned long) dev;
1485 lp->multicast_timer.function = &lance_set_multicast_retry;
1486
1487 if (register_netdev(dev)) {
1488 printk(KERN_ERR "SunLance: Cannot register device.\n");
1489 goto fail;
1490 }
1491
1492 dev_set_drvdata(&op->dev, lp);
1493
1494 printk(KERN_INFO "%s: LANCE %s\n",
1495 dev->name, print_mac(mac, dev->dev_addr));
1496
1497 return 0;
1498
1499 fail:
1500 lance_free_hwresources(lp);
1501 free_netdev(dev);
1502 return -ENODEV;
1503 }
1504
1505 static int __devinit sunlance_sbus_probe(struct of_device *op, const struct of_device_id *match)
1506 {
1507 struct of_device *parent = to_of_device(op->dev.parent);
1508 struct device_node *parent_dp = parent->node;
1509 int err;
1510
1511 if (!strcmp(parent_dp->name, "ledma")) {
1512 err = sparc_lance_probe_one(op, parent, NULL);
1513 } else if (!strcmp(parent_dp->name, "lebuffer")) {
1514 err = sparc_lance_probe_one(op, NULL, parent);
1515 } else
1516 err = sparc_lance_probe_one(op, NULL, NULL);
1517
1518 return err;
1519 }
1520
1521 static int __devexit sunlance_sbus_remove(struct of_device *op)
1522 {
1523 struct lance_private *lp = dev_get_drvdata(&op->dev);
1524 struct net_device *net_dev = lp->dev;
1525
1526 unregister_netdev(net_dev);
1527
1528 lance_free_hwresources(lp);
1529
1530 free_netdev(net_dev);
1531
1532 dev_set_drvdata(&op->dev, NULL);
1533
1534 return 0;
1535 }
1536
1537 static const struct of_device_id sunlance_sbus_match[] = {
1538 {
1539 .name = "le",
1540 },
1541 {},
1542 };
1543
1544 MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1545
1546 static struct of_platform_driver sunlance_sbus_driver = {
1547 .name = "sunlance",
1548 .match_table = sunlance_sbus_match,
1549 .probe = sunlance_sbus_probe,
1550 .remove = __devexit_p(sunlance_sbus_remove),
1551 };
1552
1553
1554 /* Find all the lance cards on the system and initialize them */
1555 static int __init sparc_lance_init(void)
1556 {
1557 return of_register_driver(&sunlance_sbus_driver, &of_bus_type);
1558 }
1559
1560 static void __exit sparc_lance_exit(void)
1561 {
1562 of_unregister_driver(&sunlance_sbus_driver);
1563 }
1564
1565 module_init(sparc_lance_init);
1566 module_exit(sparc_lance_exit);
Linux kernel - Deliverables
This page took 0.062421 seconds and 6 git commands to generate.