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[CPUFREQ] Re-enable cpufreq suspend and resume code
[linux-2.6/mini2440.git] / drivers / net / sunlance.c
blobafc7b351e5ec43a5723290ca7e958a08806bf544
1 /* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
2 * lance.c: Linux/Sparc/Lance driver
3 *
4 * Written 1995, 1996 by Miguel de Icaza
5 * Sources:
6 * The Linux depca driver
7 * The Linux lance driver.
8 * The Linux skeleton driver.
9 * The NetBSD Sparc/Lance driver.
10 * Theo de Raadt (deraadt@openbsd.org)
11 * NCR92C990 Lan Controller manual
12 *
13 * 1.4:
14 * Added support to run with a ledma on the Sun4m
15 *
16 * 1.5:
17 * Added multiple card detection.
18 *
19 * 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
20 * (ecd@skynet.be)
21 *
22 * 5/15/96: auto carrier detection on sun4m by Eddie C. Dost
23 * (ecd@skynet.be)
24 *
25 * 5/17/96: lebuffer on scsi/ether cards now work David S. Miller
26 * (davem@caip.rutgers.edu)
27 *
28 * 5/29/96: override option 'tpe-link-test?', if it is 'false', as
29 * this disables auto carrier detection on sun4m. Eddie C. Dost
30 * (ecd@skynet.be)
31 *
32 * 1.7:
33 * 6/26/96: Bug fix for multiple ledmas, miguel.
34 *
35 * 1.8:
36 * Stole multicast code from depca.c, fixed lance_tx.
37 *
38 * 1.9:
39 * 8/21/96: Fixed the multicast code (Pedro Roque)
40 *
41 * 8/28/96: Send fake packet in lance_open() if auto_select is true,
42 * so we can detect the carrier loss condition in time.
43 * Eddie C. Dost (ecd@skynet.be)
44 *
45 * 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
46 * MNA trap during chksum_partial_copy(). (ecd@skynet.be)
47 *
48 * 11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
49 *
50 * 12/22/96: Don't loop forever in lance_rx() on incomplete packets.
51 * This was the sun4c killer. Shit, stupid bug.
52 * (ecd@skynet.be)
53 *
54 * 1.10:
55 * 1/26/97: Modularize driver. (ecd@skynet.be)
56 *
57 * 1.11:
58 * 12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
59 *
60 * 1.12:
61 * 11/3/99: Fixed SMP race in lance_start_xmit found by davem.
62 * Anton Blanchard (anton@progsoc.uts.edu.au)
63 * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
64 * David S. Miller (davem@redhat.com)
65 * 2.01:
66 * 11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
67 *
68 */
69
70 #undef DEBUG_DRIVER
71
72 static char lancestr[] = "LANCE";
73
74 #include <linux/module.h>
75 #include <linux/kernel.h>
76 #include <linux/types.h>
77 #include <linux/fcntl.h>
78 #include <linux/interrupt.h>
79 #include <linux/ioport.h>
80 #include <linux/in.h>
81 #include <linux/slab.h>
82 #include <linux/string.h>
83 #include <linux/delay.h>
84 #include <linux/init.h>
85 #include <linux/crc32.h>
86 #include <linux/errno.h>
87 #include <linux/socket.h> /* Used for the temporal inet entries and routing */
88 #include <linux/route.h>
89 #include <linux/netdevice.h>
90 #include <linux/etherdevice.h>
91 #include <linux/skbuff.h>
92 #include <linux/ethtool.h>
93 #include <linux/bitops.h>
94 #include <linux/dma-mapping.h>
95 #include <linux/of.h>
96 #include <linux/of_device.h>
97
98 #include <asm/system.h>
99 #include <asm/io.h>
100 #include <asm/dma.h>
101 #include <asm/pgtable.h>
102 #include <asm/byteorder.h> /* Used by the checksum routines */
103 #include <asm/idprom.h>
104 #include <asm/prom.h>
105 #include <asm/auxio.h> /* For tpe-link-test? setting */
106 #include <asm/irq.h>
107
108 #define DRV_NAME "sunlance"
109 #define DRV_VERSION "2.02"
110 #define DRV_RELDATE "8/24/03"
111 #define DRV_AUTHOR "Miguel de Icaza (miguel@nuclecu.unam.mx)"
112
113 static char version[] =
114 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
115
116 MODULE_VERSION(DRV_VERSION);
117 MODULE_AUTHOR(DRV_AUTHOR);
118 MODULE_DESCRIPTION("Sun Lance ethernet driver");
119 MODULE_LICENSE("GPL");
120
121 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
122 #ifndef LANCE_LOG_TX_BUFFERS
123 #define LANCE_LOG_TX_BUFFERS 4
124 #define LANCE_LOG_RX_BUFFERS 4
125 #endif
126
127 #define LE_CSR0 0
128 #define LE_CSR1 1
129 #define LE_CSR2 2
130 #define LE_CSR3 3
131
132 #define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
133
134 #define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
135 #define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
136 #define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
137 #define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
138 #define LE_C0_MERR 0x0800 /* ME: Memory error */
139 #define LE_C0_RINT 0x0400 /* Received interrupt */
140 #define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
141 #define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
142 #define LE_C0_INTR 0x0080 /* Interrupt or error */
143 #define LE_C0_INEA 0x0040 /* Interrupt enable */
144 #define LE_C0_RXON 0x0020 /* Receiver on */
145 #define LE_C0_TXON 0x0010 /* Transmitter on */
146 #define LE_C0_TDMD 0x0008 /* Transmitter demand */
147 #define LE_C0_STOP 0x0004 /* Stop the card */
148 #define LE_C0_STRT 0x0002 /* Start the card */
149 #define LE_C0_INIT 0x0001 /* Init the card */
150
151 #define LE_C3_BSWP 0x4 /* SWAP */
152 #define LE_C3_ACON 0x2 /* ALE Control */
153 #define LE_C3_BCON 0x1 /* Byte control */
154
155 /* Receive message descriptor 1 */
156 #define LE_R1_OWN 0x80 /* Who owns the entry */
157 #define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */
158 #define LE_R1_FRA 0x20 /* FRA: Frame error */
159 #define LE_R1_OFL 0x10 /* OFL: Frame overflow */
160 #define LE_R1_CRC 0x08 /* CRC error */
161 #define LE_R1_BUF 0x04 /* BUF: Buffer error */
162 #define LE_R1_SOP 0x02 /* Start of packet */
163 #define LE_R1_EOP 0x01 /* End of packet */
164 #define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */
165
166 #define LE_T1_OWN 0x80 /* Lance owns the packet */
167 #define LE_T1_ERR 0x40 /* Error summary */
168 #define LE_T1_EMORE 0x10 /* Error: more than one retry needed */
169 #define LE_T1_EONE 0x08 /* Error: one retry needed */
170 #define LE_T1_EDEF 0x04 /* Error: deferred */
171 #define LE_T1_SOP 0x02 /* Start of packet */
172 #define LE_T1_EOP 0x01 /* End of packet */
173 #define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */
174
175 #define LE_T3_BUF 0x8000 /* Buffer error */
176 #define LE_T3_UFL 0x4000 /* Error underflow */
177 #define LE_T3_LCOL 0x1000 /* Error late collision */
178 #define LE_T3_CLOS 0x0800 /* Error carrier loss */
179 #define LE_T3_RTY 0x0400 /* Error retry */
180 #define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
181
182 #define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
183 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
184 #define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
185 #define TX_NEXT(__x) (((__x)+1) & TX_RING_MOD_MASK)
186
187 #define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
188 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
189 #define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
190 #define RX_NEXT(__x) (((__x)+1) & RX_RING_MOD_MASK)
191
192 #define PKT_BUF_SZ 1544
193 #define RX_BUFF_SIZE PKT_BUF_SZ
194 #define TX_BUFF_SIZE PKT_BUF_SZ
195
196 struct lance_rx_desc {
197 u16 rmd0; /* low address of packet */
198 u8 rmd1_bits; /* descriptor bits */
199 u8 rmd1_hadr; /* high address of packet */
200 s16 length; /* This length is 2s complement (negative)!
201 * Buffer length
202 */
203 u16 mblength; /* This is the actual number of bytes received */
204 };
205
206 struct lance_tx_desc {
207 u16 tmd0; /* low address of packet */
208 u8 tmd1_bits; /* descriptor bits */
209 u8 tmd1_hadr; /* high address of packet */
210 s16 length; /* Length is 2s complement (negative)! */
211 u16 misc;
212 };
213
214 /* The LANCE initialization block, described in databook. */
215 /* On the Sparc, this block should be on a DMA region */
216 struct lance_init_block {
217 u16 mode; /* Pre-set mode (reg. 15) */
218 u8 phys_addr[6]; /* Physical ethernet address */
219 u32 filter[2]; /* Multicast filter. */
220
221 /* Receive and transmit ring base, along with extra bits. */
222 u16 rx_ptr; /* receive descriptor addr */
223 u16 rx_len; /* receive len and high addr */
224 u16 tx_ptr; /* transmit descriptor addr */
225 u16 tx_len; /* transmit len and high addr */
226
227 /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
228 struct lance_rx_desc brx_ring[RX_RING_SIZE];
229 struct lance_tx_desc btx_ring[TX_RING_SIZE];
230
231 u8 tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
232 u8 pad[2]; /* align rx_buf for copy_and_sum(). */
233 u8 rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
234 };
235
236 #define libdesc_offset(rt, elem) \
237 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
238
239 #define libbuff_offset(rt, elem) \
240 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
241
242 struct lance_private {
243 void __iomem *lregs; /* Lance RAP/RDP regs. */
244 void __iomem *dregs; /* DMA controller regs. */
245 struct lance_init_block __iomem *init_block_iomem;
246 struct lance_init_block *init_block_mem;
247
248 spinlock_t lock;
249
250 int rx_new, tx_new;
251 int rx_old, tx_old;
252
253 struct of_device *ledma; /* If set this points to ledma */
254 char tpe; /* cable-selection is TPE */
255 char auto_select; /* cable-selection by carrier */
256 char burst_sizes; /* ledma SBus burst sizes */
257 char pio_buffer; /* init block in PIO space? */
258
259 unsigned short busmaster_regval;
260
261 void (*init_ring)(struct net_device *);
262 void (*rx)(struct net_device *);
263 void (*tx)(struct net_device *);
264
265 char *name;
266 dma_addr_t init_block_dvma;
267 struct net_device *dev; /* Backpointer */
268 struct of_device *op;
269 struct of_device *lebuffer;
270 struct timer_list multicast_timer;
271 };
272
273 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
274 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
275 lp->tx_old - lp->tx_new-1)
276
277 /* Lance registers. */
278 #define RDP 0x00UL /* register data port */
279 #define RAP 0x02UL /* register address port */
280 #define LANCE_REG_SIZE 0x04UL
281
282 #define STOP_LANCE(__lp) \
283 do { void __iomem *__base = (__lp)->lregs; \
284 sbus_writew(LE_CSR0, __base + RAP); \
285 sbus_writew(LE_C0_STOP, __base + RDP); \
286 } while (0)
287
288 int sparc_lance_debug = 2;
289
290 /* The Lance uses 24 bit addresses */
291 /* On the Sun4c the DVMA will provide the remaining bytes for us */
292 /* On the Sun4m we have to instruct the ledma to provide them */
293 /* Even worse, on scsi/ether SBUS cards, the init block and the
294 * transmit/receive buffers are addresses as offsets from absolute
295 * zero on the lebuffer PIO area. -DaveM
296 */
297
298 #define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
299
300 /* Load the CSR registers */
301 static void load_csrs(struct lance_private *lp)
302 {
303 u32 leptr;
304
305 if (lp->pio_buffer)
306 leptr = 0;
307 else
308 leptr = LANCE_ADDR(lp->init_block_dvma);
309
310 sbus_writew(LE_CSR1, lp->lregs + RAP);
311 sbus_writew(leptr & 0xffff, lp->lregs + RDP);
312 sbus_writew(LE_CSR2, lp->lregs + RAP);
313 sbus_writew(leptr >> 16, lp->lregs + RDP);
314 sbus_writew(LE_CSR3, lp->lregs + RAP);
315 sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
316
317 /* Point back to csr0 */
318 sbus_writew(LE_CSR0, lp->lregs + RAP);
319 }
320
321 /* Setup the Lance Rx and Tx rings */
322 static void lance_init_ring_dvma(struct net_device *dev)
323 {
324 struct lance_private *lp = netdev_priv(dev);
325 struct lance_init_block *ib = lp->init_block_mem;
326 dma_addr_t aib = lp->init_block_dvma;
327 __u32 leptr;
328 int i;
329
330 /* Lock out other processes while setting up hardware */
331 netif_stop_queue(dev);
332 lp->rx_new = lp->tx_new = 0;
333 lp->rx_old = lp->tx_old = 0;
334
335 /* Copy the ethernet address to the lance init block
336 * Note that on the sparc you need to swap the ethernet address.
337 */
338 ib->phys_addr [0] = dev->dev_addr [1];
339 ib->phys_addr [1] = dev->dev_addr [0];
340 ib->phys_addr [2] = dev->dev_addr [3];
341 ib->phys_addr [3] = dev->dev_addr [2];
342 ib->phys_addr [4] = dev->dev_addr [5];
343 ib->phys_addr [5] = dev->dev_addr [4];
344
345 /* Setup the Tx ring entries */
346 for (i = 0; i < TX_RING_SIZE; i++) {
347 leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
348 ib->btx_ring [i].tmd0 = leptr;
349 ib->btx_ring [i].tmd1_hadr = leptr >> 16;
350 ib->btx_ring [i].tmd1_bits = 0;
351 ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */
352 ib->btx_ring [i].misc = 0;
353 }
354
355 /* Setup the Rx ring entries */
356 for (i = 0; i < RX_RING_SIZE; i++) {
357 leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
358
359 ib->brx_ring [i].rmd0 = leptr;
360 ib->brx_ring [i].rmd1_hadr = leptr >> 16;
361 ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
362 ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000;
363 ib->brx_ring [i].mblength = 0;
364 }
365
366 /* Setup the initialization block */
367
368 /* Setup rx descriptor pointer */
369 leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
370 ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
371 ib->rx_ptr = leptr;
372
373 /* Setup tx descriptor pointer */
374 leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
375 ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
376 ib->tx_ptr = leptr;
377 }
378
379 static void lance_init_ring_pio(struct net_device *dev)
380 {
381 struct lance_private *lp = netdev_priv(dev);
382 struct lance_init_block __iomem *ib = lp->init_block_iomem;
383 u32 leptr;
384 int i;
385
386 /* Lock out other processes while setting up hardware */
387 netif_stop_queue(dev);
388 lp->rx_new = lp->tx_new = 0;
389 lp->rx_old = lp->tx_old = 0;
390
391 /* Copy the ethernet address to the lance init block
392 * Note that on the sparc you need to swap the ethernet address.
393 */
394 sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
395 sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
396 sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
397 sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
398 sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
399 sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
400
401 /* Setup the Tx ring entries */
402 for (i = 0; i < TX_RING_SIZE; i++) {
403 leptr = libbuff_offset(tx_buf, i);
404 sbus_writew(leptr, &ib->btx_ring [i].tmd0);
405 sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
406 sbus_writeb(0, &ib->btx_ring [i].tmd1_bits);
407
408 /* The ones required by tmd2 */
409 sbus_writew(0xf000, &ib->btx_ring [i].length);
410 sbus_writew(0, &ib->btx_ring [i].misc);
411 }
412
413 /* Setup the Rx ring entries */
414 for (i = 0; i < RX_RING_SIZE; i++) {
415 leptr = libbuff_offset(rx_buf, i);
416
417 sbus_writew(leptr, &ib->brx_ring [i].rmd0);
418 sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
419 sbus_writeb(LE_R1_OWN, &ib->brx_ring [i].rmd1_bits);
420 sbus_writew(-RX_BUFF_SIZE|0xf000,
421 &ib->brx_ring [i].length);
422 sbus_writew(0, &ib->brx_ring [i].mblength);
423 }
424
425 /* Setup the initialization block */
426
427 /* Setup rx descriptor pointer */
428 leptr = libdesc_offset(brx_ring, 0);
429 sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
430 &ib->rx_len);
431 sbus_writew(leptr, &ib->rx_ptr);
432
433 /* Setup tx descriptor pointer */
434 leptr = libdesc_offset(btx_ring, 0);
435 sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
436 &ib->tx_len);
437 sbus_writew(leptr, &ib->tx_ptr);
438 }
439
440 static void init_restart_ledma(struct lance_private *lp)
441 {
442 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
443
444 if (!(csr & DMA_HNDL_ERROR)) {
445 /* E-Cache draining */
446 while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
447 barrier();
448 }
449
450 csr = sbus_readl(lp->dregs + DMA_CSR);
451 csr &= ~DMA_E_BURSTS;
452 if (lp->burst_sizes & DMA_BURST32)
453 csr |= DMA_E_BURST32;
454 else
455 csr |= DMA_E_BURST16;
456
457 csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
458
459 if (lp->tpe)
460 csr |= DMA_EN_ENETAUI;
461 else
462 csr &= ~DMA_EN_ENETAUI;
463 udelay(20);
464 sbus_writel(csr, lp->dregs + DMA_CSR);
465 udelay(200);
466 }
467
468 static int init_restart_lance(struct lance_private *lp)
469 {
470 u16 regval = 0;
471 int i;
472
473 if (lp->dregs)
474 init_restart_ledma(lp);
475
476 sbus_writew(LE_CSR0, lp->lregs + RAP);
477 sbus_writew(LE_C0_INIT, lp->lregs + RDP);
478
479 /* Wait for the lance to complete initialization */
480 for (i = 0; i < 100; i++) {
481 regval = sbus_readw(lp->lregs + RDP);
482
483 if (regval & (LE_C0_ERR | LE_C0_IDON))
484 break;
485 barrier();
486 }
487 if (i == 100 || (regval & LE_C0_ERR)) {
488 printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
489 i, regval);
490 if (lp->dregs)
491 printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
492 return -1;
493 }
494
495 /* Clear IDON by writing a "1", enable interrupts and start lance */
496 sbus_writew(LE_C0_IDON, lp->lregs + RDP);
497 sbus_writew(LE_C0_INEA | LE_C0_STRT, lp->lregs + RDP);
498
499 if (lp->dregs) {
500 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
501
502 csr |= DMA_INT_ENAB;
503 sbus_writel(csr, lp->dregs + DMA_CSR);
504 }
505
506 return 0;
507 }
508
509 static void lance_rx_dvma(struct net_device *dev)
510 {
511 struct lance_private *lp = netdev_priv(dev);
512 struct lance_init_block *ib = lp->init_block_mem;
513 struct lance_rx_desc *rd;
514 u8 bits;
515 int len, entry = lp->rx_new;
516 struct sk_buff *skb;
517
518 for (rd = &ib->brx_ring [entry];
519 !((bits = rd->rmd1_bits) & LE_R1_OWN);
520 rd = &ib->brx_ring [entry]) {
521
522 /* We got an incomplete frame? */
523 if ((bits & LE_R1_POK) != LE_R1_POK) {
524 dev->stats.rx_over_errors++;
525 dev->stats.rx_errors++;
526 } else if (bits & LE_R1_ERR) {
527 /* Count only the end frame as a rx error,
528 * not the beginning
529 */
530 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
531 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
532 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
533 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
534 if (bits & LE_R1_EOP) dev->stats.rx_errors++;
535 } else {
536 len = (rd->mblength & 0xfff) - 4;
537 skb = dev_alloc_skb(len + 2);
538
539 if (skb == NULL) {
540 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
541 dev->name);
542 dev->stats.rx_dropped++;
543 rd->mblength = 0;
544 rd->rmd1_bits = LE_R1_OWN;
545 lp->rx_new = RX_NEXT(entry);
546 return;
547 }
548
549 dev->stats.rx_bytes += len;
550
551 skb_reserve(skb, 2); /* 16 byte align */
552 skb_put(skb, len); /* make room */
553 skb_copy_to_linear_data(skb,
554 (unsigned char *)&(ib->rx_buf [entry][0]),
555 len);
556 skb->protocol = eth_type_trans(skb, dev);
557 netif_rx(skb);
558 dev->stats.rx_packets++;
559 }
560
561 /* Return the packet to the pool */
562 rd->mblength = 0;
563 rd->rmd1_bits = LE_R1_OWN;
564 entry = RX_NEXT(entry);
565 }
566
567 lp->rx_new = entry;
568 }
569
570 static void lance_tx_dvma(struct net_device *dev)
571 {
572 struct lance_private *lp = netdev_priv(dev);
573 struct lance_init_block *ib = lp->init_block_mem;
574 int i, j;
575
576 spin_lock(&lp->lock);
577
578 j = lp->tx_old;
579 for (i = j; i != lp->tx_new; i = j) {
580 struct lance_tx_desc *td = &ib->btx_ring [i];
581 u8 bits = td->tmd1_bits;
582
583 /* If we hit a packet not owned by us, stop */
584 if (bits & LE_T1_OWN)
585 break;
586
587 if (bits & LE_T1_ERR) {
588 u16 status = td->misc;
589
590 dev->stats.tx_errors++;
591 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
592 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
593
594 if (status & LE_T3_CLOS) {
595 dev->stats.tx_carrier_errors++;
596 if (lp->auto_select) {
597 lp->tpe = 1 - lp->tpe;
598 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
599 dev->name, lp->tpe?"TPE":"AUI");
600 STOP_LANCE(lp);
601 lp->init_ring(dev);
602 load_csrs(lp);
603 init_restart_lance(lp);
604 goto out;
605 }
606 }
607
608 /* Buffer errors and underflows turn off the
609 * transmitter, restart the adapter.
610 */
611 if (status & (LE_T3_BUF|LE_T3_UFL)) {
612 dev->stats.tx_fifo_errors++;
613
614 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
615 dev->name);
616 STOP_LANCE(lp);
617 lp->init_ring(dev);
618 load_csrs(lp);
619 init_restart_lance(lp);
620 goto out;
621 }
622 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
623 /*
624 * So we don't count the packet more than once.
625 */
626 td->tmd1_bits = bits & ~(LE_T1_POK);
627
628 /* One collision before packet was sent. */
629 if (bits & LE_T1_EONE)
630 dev->stats.collisions++;
631
632 /* More than one collision, be optimistic. */
633 if (bits & LE_T1_EMORE)
634 dev->stats.collisions += 2;
635
636 dev->stats.tx_packets++;
637 }
638
639 j = TX_NEXT(j);
640 }
641 lp->tx_old = j;
642 out:
643 if (netif_queue_stopped(dev) &&
644 TX_BUFFS_AVAIL > 0)
645 netif_wake_queue(dev);
646
647 spin_unlock(&lp->lock);
648 }
649
650 static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
651 {
652 u16 *p16 = (u16 *) skb->data;
653 u32 *p32;
654 u8 *p8;
655 void __iomem *pbuf = piobuf;
656
657 /* We know here that both src and dest are on a 16bit boundary. */
658 *p16++ = sbus_readw(pbuf);
659 p32 = (u32 *) p16;
660 pbuf += 2;
661 len -= 2;
662
663 while (len >= 4) {
664 *p32++ = sbus_readl(pbuf);
665 pbuf += 4;
666 len -= 4;
667 }
668 p8 = (u8 *) p32;
669 if (len >= 2) {
670 p16 = (u16 *) p32;
671 *p16++ = sbus_readw(pbuf);
672 pbuf += 2;
673 len -= 2;
674 p8 = (u8 *) p16;
675 }
676 if (len >= 1)
677 *p8 = sbus_readb(pbuf);
678 }
679
680 static void lance_rx_pio(struct net_device *dev)
681 {
682 struct lance_private *lp = netdev_priv(dev);
683 struct lance_init_block __iomem *ib = lp->init_block_iomem;
684 struct lance_rx_desc __iomem *rd;
685 unsigned char bits;
686 int len, entry;
687 struct sk_buff *skb;
688
689 entry = lp->rx_new;
690 for (rd = &ib->brx_ring [entry];
691 !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
692 rd = &ib->brx_ring [entry]) {
693
694 /* We got an incomplete frame? */
695 if ((bits & LE_R1_POK) != LE_R1_POK) {
696 dev->stats.rx_over_errors++;
697 dev->stats.rx_errors++;
698 } else if (bits & LE_R1_ERR) {
699 /* Count only the end frame as a rx error,
700 * not the beginning
701 */
702 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
703 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
704 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
705 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
706 if (bits & LE_R1_EOP) dev->stats.rx_errors++;
707 } else {
708 len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
709 skb = dev_alloc_skb(len + 2);
710
711 if (skb == NULL) {
712 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
713 dev->name);
714 dev->stats.rx_dropped++;
715 sbus_writew(0, &rd->mblength);
716 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
717 lp->rx_new = RX_NEXT(entry);
718 return;
719 }
720
721 dev->stats.rx_bytes += len;
722
723 skb_reserve (skb, 2); /* 16 byte align */
724 skb_put(skb, len); /* make room */
725 lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
726 skb->protocol = eth_type_trans(skb, dev);
727 netif_rx(skb);
728 dev->stats.rx_packets++;
729 }
730
731 /* Return the packet to the pool */
732 sbus_writew(0, &rd->mblength);
733 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
734 entry = RX_NEXT(entry);
735 }
736
737 lp->rx_new = entry;
738 }
739
740 static void lance_tx_pio(struct net_device *dev)
741 {
742 struct lance_private *lp = netdev_priv(dev);
743 struct lance_init_block __iomem *ib = lp->init_block_iomem;
744 int i, j;
745
746 spin_lock(&lp->lock);
747
748 j = lp->tx_old;
749 for (i = j; i != lp->tx_new; i = j) {
750 struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
751 u8 bits = sbus_readb(&td->tmd1_bits);
752
753 /* If we hit a packet not owned by us, stop */
754 if (bits & LE_T1_OWN)
755 break;
756
757 if (bits & LE_T1_ERR) {
758 u16 status = sbus_readw(&td->misc);
759
760 dev->stats.tx_errors++;
761 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
762 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
763
764 if (status & LE_T3_CLOS) {
765 dev->stats.tx_carrier_errors++;
766 if (lp->auto_select) {
767 lp->tpe = 1 - lp->tpe;
768 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
769 dev->name, lp->tpe?"TPE":"AUI");
770 STOP_LANCE(lp);
771 lp->init_ring(dev);
772 load_csrs(lp);
773 init_restart_lance(lp);
774 goto out;
775 }
776 }
777
778 /* Buffer errors and underflows turn off the
779 * transmitter, restart the adapter.
780 */
781 if (status & (LE_T3_BUF|LE_T3_UFL)) {
782 dev->stats.tx_fifo_errors++;
783
784 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
785 dev->name);
786 STOP_LANCE(lp);
787 lp->init_ring(dev);
788 load_csrs(lp);
789 init_restart_lance(lp);
790 goto out;
791 }
792 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
793 /*
794 * So we don't count the packet more than once.
795 */
796 sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
797
798 /* One collision before packet was sent. */
799 if (bits & LE_T1_EONE)
800 dev->stats.collisions++;
801
802 /* More than one collision, be optimistic. */
803 if (bits & LE_T1_EMORE)
804 dev->stats.collisions += 2;
805
806 dev->stats.tx_packets++;
807 }
808
809 j = TX_NEXT(j);
810 }
811 lp->tx_old = j;
812
813 if (netif_queue_stopped(dev) &&
814 TX_BUFFS_AVAIL > 0)
815 netif_wake_queue(dev);
816 out:
817 spin_unlock(&lp->lock);
818 }
819
820 static irqreturn_t lance_interrupt(int irq, void *dev_id)
821 {
822 struct net_device *dev = dev_id;
823 struct lance_private *lp = netdev_priv(dev);
824 int csr0;
825
826 sbus_writew(LE_CSR0, lp->lregs + RAP);
827 csr0 = sbus_readw(lp->lregs + RDP);
828
829 /* Acknowledge all the interrupt sources ASAP */
830 sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
831 lp->lregs + RDP);
832
833 if ((csr0 & LE_C0_ERR) != 0) {
834 /* Clear the error condition */
835 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
836 LE_C0_CERR | LE_C0_MERR),
837 lp->lregs + RDP);
838 }
839
840 if (csr0 & LE_C0_RINT)
841 lp->rx(dev);
842
843 if (csr0 & LE_C0_TINT)
844 lp->tx(dev);
845
846 if (csr0 & LE_C0_BABL)
847 dev->stats.tx_errors++;
848
849 if (csr0 & LE_C0_MISS)
850 dev->stats.rx_errors++;
851
852 if (csr0 & LE_C0_MERR) {
853 if (lp->dregs) {
854 u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
855
856 printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
857 dev->name, csr0, addr & 0xffffff);
858 } else {
859 printk(KERN_ERR "%s: Memory error, status %04x\n",
860 dev->name, csr0);
861 }
862
863 sbus_writew(LE_C0_STOP, lp->lregs + RDP);
864
865 if (lp->dregs) {
866 u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
867
868 dma_csr |= DMA_FIFO_INV;
869 sbus_writel(dma_csr, lp->dregs + DMA_CSR);
870 }
871
872 lp->init_ring(dev);
873 load_csrs(lp);
874 init_restart_lance(lp);
875 netif_wake_queue(dev);
876 }
877
878 sbus_writew(LE_C0_INEA, lp->lregs + RDP);
879
880 return IRQ_HANDLED;
881 }
882
883 /* Build a fake network packet and send it to ourselves. */
884 static void build_fake_packet(struct lance_private *lp)
885 {
886 struct net_device *dev = lp->dev;
887 int i, entry;
888
889 entry = lp->tx_new & TX_RING_MOD_MASK;
890 if (lp->pio_buffer) {
891 struct lance_init_block __iomem *ib = lp->init_block_iomem;
892 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
893 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
894 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
895 sbus_writew(0, &packet[i]);
896 for (i = 0; i < 6; i++) {
897 sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
898 sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
899 }
900 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
901 sbus_writew(0, &ib->btx_ring[entry].misc);
902 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
903 } else {
904 struct lance_init_block *ib = lp->init_block_mem;
905 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
906 struct ethhdr *eth = (struct ethhdr *) packet;
907 memset(packet, 0, ETH_ZLEN);
908 for (i = 0; i < 6; i++) {
909 eth->h_dest[i] = dev->dev_addr[i];
910 eth->h_source[i] = dev->dev_addr[i];
911 }
912 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
913 ib->btx_ring[entry].misc = 0;
914 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
915 }
916 lp->tx_new = TX_NEXT(entry);
917 }
918
919 static int lance_open(struct net_device *dev)
920 {
921 struct lance_private *lp = netdev_priv(dev);
922 int status = 0;
923
924 STOP_LANCE(lp);
925
926 if (request_irq(dev->irq, &lance_interrupt, IRQF_SHARED,
927 lancestr, (void *) dev)) {
928 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
929 return -EAGAIN;
930 }
931
932 /* On the 4m, setup the ledma to provide the upper bits for buffers */
933 if (lp->dregs) {
934 u32 regval = lp->init_block_dvma & 0xff000000;
935
936 sbus_writel(regval, lp->dregs + DMA_TEST);
937 }
938
939 /* Set mode and clear multicast filter only at device open,
940 * so that lance_init_ring() called at any error will not
941 * forget multicast filters.
942 *
943 * BTW it is common bug in all lance drivers! --ANK
944 */
945 if (lp->pio_buffer) {
946 struct lance_init_block __iomem *ib = lp->init_block_iomem;
947 sbus_writew(0, &ib->mode);
948 sbus_writel(0, &ib->filter[0]);
949 sbus_writel(0, &ib->filter[1]);
950 } else {
951 struct lance_init_block *ib = lp->init_block_mem;
952 ib->mode = 0;
953 ib->filter [0] = 0;
954 ib->filter [1] = 0;
955 }
956
957 lp->init_ring(dev);
958 load_csrs(lp);
959
960 netif_start_queue(dev);
961
962 status = init_restart_lance(lp);
963 if (!status && lp->auto_select) {
964 build_fake_packet(lp);
965 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
966 }
967
968 return status;
969 }
970
971 static int lance_close(struct net_device *dev)
972 {
973 struct lance_private *lp = netdev_priv(dev);
974
975 netif_stop_queue(dev);
976 del_timer_sync(&lp->multicast_timer);
977
978 STOP_LANCE(lp);
979
980 free_irq(dev->irq, (void *) dev);
981 return 0;
982 }
983
984 static int lance_reset(struct net_device *dev)
985 {
986 struct lance_private *lp = netdev_priv(dev);
987 int status;
988
989 STOP_LANCE(lp);
990
991 /* On the 4m, reset the dma too */
992 if (lp->dregs) {
993 u32 csr, addr;
994
995 printk(KERN_ERR "resetting ledma\n");
996 csr = sbus_readl(lp->dregs + DMA_CSR);
997 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
998 udelay(200);
999 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1000
1001 addr = lp->init_block_dvma & 0xff000000;
1002 sbus_writel(addr, lp->dregs + DMA_TEST);
1003 }
1004 lp->init_ring(dev);
1005 load_csrs(lp);
1006 dev->trans_start = jiffies;
1007 status = init_restart_lance(lp);
1008 return status;
1009 }
1010
1011 static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1012 {
1013 void __iomem *piobuf = dest;
1014 u32 *p32;
1015 u16 *p16;
1016 u8 *p8;
1017
1018 switch ((unsigned long)src & 0x3) {
1019 case 0:
1020 p32 = (u32 *) src;
1021 while (len >= 4) {
1022 sbus_writel(*p32, piobuf);
1023 p32++;
1024 piobuf += 4;
1025 len -= 4;
1026 }
1027 src = (char *) p32;
1028 break;
1029 case 1:
1030 case 3:
1031 p8 = (u8 *) src;
1032 while (len >= 4) {
1033 u32 val;
1034
1035 val = p8[0] << 24;
1036 val |= p8[1] << 16;
1037 val |= p8[2] << 8;
1038 val |= p8[3];
1039 sbus_writel(val, piobuf);
1040 p8 += 4;
1041 piobuf += 4;
1042 len -= 4;
1043 }
1044 src = (char *) p8;
1045 break;
1046 case 2:
1047 p16 = (u16 *) src;
1048 while (len >= 4) {
1049 u32 val = p16[0]<<16 | p16[1];
1050 sbus_writel(val, piobuf);
1051 p16 += 2;
1052 piobuf += 4;
1053 len -= 4;
1054 }
1055 src = (char *) p16;
1056 break;
1057 };
1058 if (len >= 2) {
1059 u16 val = src[0] << 8 | src[1];
1060 sbus_writew(val, piobuf);
1061 src += 2;
1062 piobuf += 2;
1063 len -= 2;
1064 }
1065 if (len >= 1)
1066 sbus_writeb(src[0], piobuf);
1067 }
1068
1069 static void lance_piozero(void __iomem *dest, int len)
1070 {
1071 void __iomem *piobuf = dest;
1072
1073 if ((unsigned long)piobuf & 1) {
1074 sbus_writeb(0, piobuf);
1075 piobuf += 1;
1076 len -= 1;
1077 if (len == 0)
1078 return;
1079 }
1080 if (len == 1) {
1081 sbus_writeb(0, piobuf);
1082 return;
1083 }
1084 if ((unsigned long)piobuf & 2) {
1085 sbus_writew(0, piobuf);
1086 piobuf += 2;
1087 len -= 2;
1088 if (len == 0)
1089 return;
1090 }
1091 while (len >= 4) {
1092 sbus_writel(0, piobuf);
1093 piobuf += 4;
1094 len -= 4;
1095 }
1096 if (len >= 2) {
1097 sbus_writew(0, piobuf);
1098 piobuf += 2;
1099 len -= 2;
1100 }
1101 if (len >= 1)
1102 sbus_writeb(0, piobuf);
1103 }
1104
1105 static void lance_tx_timeout(struct net_device *dev)
1106 {
1107 struct lance_private *lp = netdev_priv(dev);
1108
1109 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1110 dev->name, sbus_readw(lp->lregs + RDP));
1111 lance_reset(dev);
1112 netif_wake_queue(dev);
1113 }
1114
1115 static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1116 {
1117 struct lance_private *lp = netdev_priv(dev);
1118 int entry, skblen, len;
1119
1120 skblen = skb->len;
1121
1122 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1123
1124 spin_lock_irq(&lp->lock);
1125
1126 dev->stats.tx_bytes += len;
1127
1128 entry = lp->tx_new & TX_RING_MOD_MASK;
1129 if (lp->pio_buffer) {
1130 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1131 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1132 sbus_writew(0, &ib->btx_ring[entry].misc);
1133 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1134 if (len != skblen)
1135 lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1136 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1137 } else {
1138 struct lance_init_block *ib = lp->init_block_mem;
1139 ib->btx_ring [entry].length = (-len) | 0xf000;
1140 ib->btx_ring [entry].misc = 0;
1141 skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1142 if (len != skblen)
1143 memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1144 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1145 }
1146
1147 lp->tx_new = TX_NEXT(entry);
1148
1149 if (TX_BUFFS_AVAIL <= 0)
1150 netif_stop_queue(dev);
1151
1152 /* Kick the lance: transmit now */
1153 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1154
1155 /* Read back CSR to invalidate the E-Cache.
1156 * This is needed, because DMA_DSBL_WR_INV is set.
1157 */
1158 if (lp->dregs)
1159 sbus_readw(lp->lregs + RDP);
1160
1161 spin_unlock_irq(&lp->lock);
1162
1163 dev->trans_start = jiffies;
1164 dev_kfree_skb(skb);
1165
1166 return 0;
1167 }
1168
1169 /* taken from the depca driver */
1170 static void lance_load_multicast(struct net_device *dev)
1171 {
1172 struct lance_private *lp = netdev_priv(dev);
1173 struct dev_mc_list *dmi = dev->mc_list;
1174 char *addrs;
1175 int i;
1176 u32 crc;
1177 u32 val;
1178
1179 /* set all multicast bits */
1180 if (dev->flags & IFF_ALLMULTI)
1181 val = ~0;
1182 else
1183 val = 0;
1184
1185 if (lp->pio_buffer) {
1186 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1187 sbus_writel(val, &ib->filter[0]);
1188 sbus_writel(val, &ib->filter[1]);
1189 } else {
1190 struct lance_init_block *ib = lp->init_block_mem;
1191 ib->filter [0] = val;
1192 ib->filter [1] = val;
1193 }
1194
1195 if (dev->flags & IFF_ALLMULTI)
1196 return;
1197
1198 /* Add addresses */
1199 for (i = 0; i < dev->mc_count; i++) {
1200 addrs = dmi->dmi_addr;
1201 dmi = dmi->next;
1202
1203 /* multicast address? */
1204 if (!(*addrs & 1))
1205 continue;
1206 crc = ether_crc_le(6, addrs);
1207 crc = crc >> 26;
1208 if (lp->pio_buffer) {
1209 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1210 u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1211 u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1212 tmp |= 1 << (crc & 0xf);
1213 sbus_writew(tmp, &mcast_table[crc>>4]);
1214 } else {
1215 struct lance_init_block *ib = lp->init_block_mem;
1216 u16 *mcast_table = (u16 *) &ib->filter;
1217 mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1218 }
1219 }
1220 }
1221
1222 static void lance_set_multicast(struct net_device *dev)
1223 {
1224 struct lance_private *lp = netdev_priv(dev);
1225 struct lance_init_block *ib_mem = lp->init_block_mem;
1226 struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1227 u16 mode;
1228
1229 if (!netif_running(dev))
1230 return;
1231
1232 if (lp->tx_old != lp->tx_new) {
1233 mod_timer(&lp->multicast_timer, jiffies + 4);
1234 netif_wake_queue(dev);
1235 return;
1236 }
1237
1238 netif_stop_queue(dev);
1239
1240 STOP_LANCE(lp);
1241 lp->init_ring(dev);
1242
1243 if (lp->pio_buffer)
1244 mode = sbus_readw(&ib_iomem->mode);
1245 else
1246 mode = ib_mem->mode;
1247 if (dev->flags & IFF_PROMISC) {
1248 mode |= LE_MO_PROM;
1249 if (lp->pio_buffer)
1250 sbus_writew(mode, &ib_iomem->mode);
1251 else
1252 ib_mem->mode = mode;
1253 } else {
1254 mode &= ~LE_MO_PROM;
1255 if (lp->pio_buffer)
1256 sbus_writew(mode, &ib_iomem->mode);
1257 else
1258 ib_mem->mode = mode;
1259 lance_load_multicast(dev);
1260 }
1261 load_csrs(lp);
1262 init_restart_lance(lp);
1263 netif_wake_queue(dev);
1264 }
1265
1266 static void lance_set_multicast_retry(unsigned long _opaque)
1267 {
1268 struct net_device *dev = (struct net_device *) _opaque;
1269
1270 lance_set_multicast(dev);
1271 }
1272
1273 static void lance_free_hwresources(struct lance_private *lp)
1274 {
1275 if (lp->lregs)
1276 of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
1277 if (lp->dregs) {
1278 struct of_device *ledma = lp->ledma;
1279
1280 of_iounmap(&ledma->resource[0], lp->dregs,
1281 resource_size(&ledma->resource[0]));
1282 }
1283 if (lp->init_block_iomem) {
1284 of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
1285 sizeof(struct lance_init_block));
1286 } else if (lp->init_block_mem) {
1287 dma_free_coherent(&lp->op->dev,
1288 sizeof(struct lance_init_block),
1289 lp->init_block_mem,
1290 lp->init_block_dvma);
1291 }
1292 }
1293
1294 /* Ethtool support... */
1295 static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1296 {
1297 strcpy(info->driver, "sunlance");
1298 strcpy(info->version, "2.02");
1299 }
1300
1301 static u32 sparc_lance_get_link(struct net_device *dev)
1302 {
1303 /* We really do not keep track of this, but this
1304 * is better than not reporting anything at all.
1305 */
1306 return 1;
1307 }
1308
1309 static const struct ethtool_ops sparc_lance_ethtool_ops = {
1310 .get_drvinfo = sparc_lance_get_drvinfo,
1311 .get_link = sparc_lance_get_link,
1312 };
1313
1314 static const struct net_device_ops sparc_lance_ops = {
1315 .ndo_open = lance_open,
1316 .ndo_stop = lance_close,
1317 .ndo_start_xmit = lance_start_xmit,
1318 .ndo_set_multicast_list = lance_set_multicast,
1319 .ndo_tx_timeout = lance_tx_timeout,
1320 .ndo_change_mtu = eth_change_mtu,
1321 .ndo_set_mac_address = eth_mac_addr,
1322 .ndo_validate_addr = eth_validate_addr,
1323 };
1324
1325 static int __devinit sparc_lance_probe_one(struct of_device *op,
1326 struct of_device *ledma,
1327 struct of_device *lebuffer)
1328 {
1329 struct device_node *dp = op->node;
1330 static unsigned version_printed;
1331 struct lance_private *lp;
1332 struct net_device *dev;
1333 int i;
1334
1335 dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1336 if (!dev)
1337 return -ENOMEM;
1338
1339 lp = netdev_priv(dev);
1340
1341 if (sparc_lance_debug && version_printed++ == 0)
1342 printk (KERN_INFO "%s", version);
1343
1344 spin_lock_init(&lp->lock);
1345
1346 /* Copy the IDPROM ethernet address to the device structure, later we
1347 * will copy the address in the device structure to the lance
1348 * initialization block.
1349 */
1350 for (i = 0; i < 6; i++)
1351 dev->dev_addr[i] = idprom->id_ethaddr[i];
1352
1353 /* Get the IO region */
1354 lp->lregs = of_ioremap(&op->resource[0], 0,
1355 LANCE_REG_SIZE, lancestr);
1356 if (!lp->lregs) {
1357 printk(KERN_ERR "SunLance: Cannot map registers.\n");
1358 goto fail;
1359 }
1360
1361 lp->ledma = ledma;
1362 if (lp->ledma) {
1363 lp->dregs = of_ioremap(&ledma->resource[0], 0,
1364 resource_size(&ledma->resource[0]),
1365 "ledma");
1366 if (!lp->dregs) {
1367 printk(KERN_ERR "SunLance: Cannot map "
1368 "ledma registers.\n");
1369 goto fail;
1370 }
1371 }
1372
1373 lp->op = op;
1374 lp->lebuffer = lebuffer;
1375 if (lebuffer) {
1376 /* sanity check */
1377 if (lebuffer->resource[0].start & 7) {
1378 printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1379 goto fail;
1380 }
1381 lp->init_block_iomem =
1382 of_ioremap(&lebuffer->resource[0], 0,
1383 sizeof(struct lance_init_block), "lebuffer");
1384 if (!lp->init_block_iomem) {
1385 printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1386 goto fail;
1387 }
1388 lp->init_block_dvma = 0;
1389 lp->pio_buffer = 1;
1390 lp->init_ring = lance_init_ring_pio;
1391 lp->rx = lance_rx_pio;
1392 lp->tx = lance_tx_pio;
1393 } else {
1394 lp->init_block_mem =
1395 dma_alloc_coherent(&op->dev,
1396 sizeof(struct lance_init_block),
1397 &lp->init_block_dvma, GFP_ATOMIC);
1398 if (!lp->init_block_mem) {
1399 printk(KERN_ERR "SunLance: Cannot allocate consistent DMA memory.\n");
1400 goto fail;
1401 }
1402 lp->pio_buffer = 0;
1403 lp->init_ring = lance_init_ring_dvma;
1404 lp->rx = lance_rx_dvma;
1405 lp->tx = lance_tx_dvma;
1406 }
1407 lp->busmaster_regval = of_getintprop_default(dp, "busmaster-regval",
1408 (LE_C3_BSWP |
1409 LE_C3_ACON |
1410 LE_C3_BCON));
1411
1412 lp->name = lancestr;
1413
1414 lp->burst_sizes = 0;
1415 if (lp->ledma) {
1416 struct device_node *ledma_dp = ledma->node;
1417 struct device_node *sbus_dp;
1418 unsigned int sbmask;
1419 const char *prop;
1420 u32 csr;
1421
1422 /* Find burst-size property for ledma */
1423 lp->burst_sizes = of_getintprop_default(ledma_dp,
1424 "burst-sizes", 0);
1425
1426 /* ledma may be capable of fast bursts, but sbus may not. */
1427 sbus_dp = ledma_dp->parent;
1428 sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
1429 DMA_BURSTBITS);
1430 lp->burst_sizes &= sbmask;
1431
1432 /* Get the cable-selection property */
1433 prop = of_get_property(ledma_dp, "cable-selection", NULL);
1434 if (!prop || prop[0] == '\0') {
1435 struct device_node *nd;
1436
1437 printk(KERN_INFO "SunLance: using "
1438 "auto-carrier-detection.\n");
1439
1440 nd = of_find_node_by_path("/options");
1441 if (!nd)
1442 goto no_link_test;
1443
1444 prop = of_get_property(nd, "tpe-link-test?", NULL);
1445 if (!prop)
1446 goto no_link_test;
1447
1448 if (strcmp(prop, "true")) {
1449 printk(KERN_NOTICE "SunLance: warning: overriding option "
1450 "'tpe-link-test?'\n");
1451 printk(KERN_NOTICE "SunLance: warning: mail any problems "
1452 "to ecd@skynet.be\n");
1453 auxio_set_lte(AUXIO_LTE_ON);
1454 }
1455 no_link_test:
1456 lp->auto_select = 1;
1457 lp->tpe = 0;
1458 } else if (!strcmp(prop, "aui")) {
1459 lp->auto_select = 0;
1460 lp->tpe = 0;
1461 } else {
1462 lp->auto_select = 0;
1463 lp->tpe = 1;
1464 }
1465
1466 /* Reset ledma */
1467 csr = sbus_readl(lp->dregs + DMA_CSR);
1468 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1469 udelay(200);
1470 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1471 } else
1472 lp->dregs = NULL;
1473
1474 lp->dev = dev;
1475 SET_NETDEV_DEV(dev, &op->dev);
1476 dev->watchdog_timeo = 5*HZ;
1477 dev->ethtool_ops = &sparc_lance_ethtool_ops;
1478 dev->netdev_ops = &sparc_lance_ops;
1479
1480 dev->irq = op->irqs[0];
1481
1482 /* We cannot sleep if the chip is busy during a
1483 * multicast list update event, because such events
1484 * can occur from interrupts (ex. IPv6). So we
1485 * use a timer to try again later when necessary. -DaveM
1486 */
1487 init_timer(&lp->multicast_timer);
1488 lp->multicast_timer.data = (unsigned long) dev;
1489 lp->multicast_timer.function = &lance_set_multicast_retry;
1490
1491 if (register_netdev(dev)) {
1492 printk(KERN_ERR "SunLance: Cannot register device.\n");
1493 goto fail;
1494 }
1495
1496 dev_set_drvdata(&op->dev, lp);
1497
1498 printk(KERN_INFO "%s: LANCE %pM\n",
1499 dev->name, dev->dev_addr);
1500
1501 return 0;
1502
1503 fail:
1504 lance_free_hwresources(lp);
1505 free_netdev(dev);
1506 return -ENODEV;
1507 }
1508
1509 static int __devinit sunlance_sbus_probe(struct of_device *op, const struct of_device_id *match)
1510 {
1511 struct of_device *parent = to_of_device(op->dev.parent);
1512 struct device_node *parent_dp = parent->node;
1513 int err;
1514
1515 if (!strcmp(parent_dp->name, "ledma")) {
1516 err = sparc_lance_probe_one(op, parent, NULL);
1517 } else if (!strcmp(parent_dp->name, "lebuffer")) {
1518 err = sparc_lance_probe_one(op, NULL, parent);
1519 } else
1520 err = sparc_lance_probe_one(op, NULL, NULL);
1521
1522 return err;
1523 }
1524
1525 static int __devexit sunlance_sbus_remove(struct of_device *op)
1526 {
1527 struct lance_private *lp = dev_get_drvdata(&op->dev);
1528 struct net_device *net_dev = lp->dev;
1529
1530 unregister_netdev(net_dev);
1531
1532 lance_free_hwresources(lp);
1533
1534 free_netdev(net_dev);
1535
1536 dev_set_drvdata(&op->dev, NULL);
1537
1538 return 0;
1539 }
1540
1541 static const struct of_device_id sunlance_sbus_match[] = {
1542 {
1543 .name = "le",
1544 },
1545 {},
1546 };
1547
1548 MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1549
1550 static struct of_platform_driver sunlance_sbus_driver = {
1551 .name = "sunlance",
1552 .match_table = sunlance_sbus_match,
1553 .probe = sunlance_sbus_probe,
1554 .remove = __devexit_p(sunlance_sbus_remove),
1555 };
1556
1557
1558 /* Find all the lance cards on the system and initialize them */
1559 static int __init sparc_lance_init(void)
1560 {
1561 return of_register_driver(&sunlance_sbus_driver, &of_bus_type);
1562 }
1563
1564 static void __exit sparc_lance_exit(void)
1565 {
1566 of_unregister_driver(&sunlance_sbus_driver);
1567 }
1568
1569 module_init(sparc_lance_init);
1570 module_exit(sparc_lance_exit);
Support for the Chinese Samsung S3C2440 based development boards