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ACPI: thinkpad-acpi: improve dock subdriver initialization
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / sunlance.c
blob5b00d79b557376d6f63b143a8d3effd697b70294
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->dev = dev;
551 skb_reserve(skb, 2); /* 16 byte align */
552 skb_put(skb, len); /* make room */
553 eth_copy_and_sum(skb,
554 (unsigned char *)&(ib->rx_buf [entry][0]),
555 len, 0);
556 skb->protocol = eth_type_trans(skb, dev);
557 netif_rx(skb);
558 dev->last_rx = jiffies;
559 lp->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 lp->stats.tx_errors++;
592 if (status & LE_T3_RTY) lp->stats.tx_aborted_errors++;
593 if (status & LE_T3_LCOL) lp->stats.tx_window_errors++;
594
595 if (status & LE_T3_CLOS) {
596 lp->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 lp->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 lp->stats.collisions++;
632
633 /* More than one collision, be optimistic. */
634 if (bits & LE_T1_EMORE)
635 lp->stats.collisions += 2;
636
637 lp->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 lp->stats.rx_over_errors++;
698 lp->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) lp->stats.rx_fifo_errors++;
704 if (bits & LE_R1_CRC) lp->stats.rx_crc_errors++;
705 if (bits & LE_R1_OFL) lp->stats.rx_over_errors++;
706 if (bits & LE_R1_FRA) lp->stats.rx_frame_errors++;
707 if (bits & LE_R1_EOP) lp->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 lp->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 lp->stats.rx_bytes += len;
723
724 skb->dev = dev;
725 skb_reserve (skb, 2); /* 16 byte align */
726 skb_put(skb, len); /* make room */
727 lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
728 skb->protocol = eth_type_trans(skb, dev);
729 netif_rx(skb);
730 dev->last_rx = jiffies;
731 lp->stats.rx_packets++;
732 }
733
734 /* Return the packet to the pool */
735 sbus_writew(0, &rd->mblength);
736 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
737 entry = RX_NEXT(entry);
738 }
739
740 lp->rx_new = entry;
741 }
742
743 static void lance_tx_pio(struct net_device *dev)
744 {
745 struct lance_private *lp = netdev_priv(dev);
746 struct lance_init_block __iomem *ib = lp->init_block_iomem;
747 int i, j;
748
749 spin_lock(&lp->lock);
750
751 j = lp->tx_old;
752 for (i = j; i != lp->tx_new; i = j) {
753 struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
754 u8 bits = sbus_readb(&td->tmd1_bits);
755
756 /* If we hit a packet not owned by us, stop */
757 if (bits & LE_T1_OWN)
758 break;
759
760 if (bits & LE_T1_ERR) {
761 u16 status = sbus_readw(&td->misc);
762
763 lp->stats.tx_errors++;
764 if (status & LE_T3_RTY) lp->stats.tx_aborted_errors++;
765 if (status & LE_T3_LCOL) lp->stats.tx_window_errors++;
766
767 if (status & LE_T3_CLOS) {
768 lp->stats.tx_carrier_errors++;
769 if (lp->auto_select) {
770 lp->tpe = 1 - lp->tpe;
771 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
772 dev->name, lp->tpe?"TPE":"AUI");
773 STOP_LANCE(lp);
774 lp->init_ring(dev);
775 load_csrs(lp);
776 init_restart_lance(lp);
777 goto out;
778 }
779 }
780
781 /* Buffer errors and underflows turn off the
782 * transmitter, restart the adapter.
783 */
784 if (status & (LE_T3_BUF|LE_T3_UFL)) {
785 lp->stats.tx_fifo_errors++;
786
787 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
788 dev->name);
789 STOP_LANCE(lp);
790 lp->init_ring(dev);
791 load_csrs(lp);
792 init_restart_lance(lp);
793 goto out;
794 }
795 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
796 /*
797 * So we don't count the packet more than once.
798 */
799 sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
800
801 /* One collision before packet was sent. */
802 if (bits & LE_T1_EONE)
803 lp->stats.collisions++;
804
805 /* More than one collision, be optimistic. */
806 if (bits & LE_T1_EMORE)
807 lp->stats.collisions += 2;
808
809 lp->stats.tx_packets++;
810 }
811
812 j = TX_NEXT(j);
813 }
814 lp->tx_old = j;
815
816 if (netif_queue_stopped(dev) &&
817 TX_BUFFS_AVAIL > 0)
818 netif_wake_queue(dev);
819 out:
820 spin_unlock(&lp->lock);
821 }
822
823 static irqreturn_t lance_interrupt(int irq, void *dev_id)
824 {
825 struct net_device *dev = dev_id;
826 struct lance_private *lp = netdev_priv(dev);
827 int csr0;
828
829 sbus_writew(LE_CSR0, lp->lregs + RAP);
830 csr0 = sbus_readw(lp->lregs + RDP);
831
832 /* Acknowledge all the interrupt sources ASAP */
833 sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
834 lp->lregs + RDP);
835
836 if ((csr0 & LE_C0_ERR) != 0) {
837 /* Clear the error condition */
838 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
839 LE_C0_CERR | LE_C0_MERR),
840 lp->lregs + RDP);
841 }
842
843 if (csr0 & LE_C0_RINT)
844 lp->rx(dev);
845
846 if (csr0 & LE_C0_TINT)
847 lp->tx(dev);
848
849 if (csr0 & LE_C0_BABL)
850 lp->stats.tx_errors++;
851
852 if (csr0 & LE_C0_MISS)
853 lp->stats.rx_errors++;
854
855 if (csr0 & LE_C0_MERR) {
856 if (lp->dregs) {
857 u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
858
859 printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
860 dev->name, csr0, addr & 0xffffff);
861 } else {
862 printk(KERN_ERR "%s: Memory error, status %04x\n",
863 dev->name, csr0);
864 }
865
866 sbus_writew(LE_C0_STOP, lp->lregs + RDP);
867
868 if (lp->dregs) {
869 u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
870
871 dma_csr |= DMA_FIFO_INV;
872 sbus_writel(dma_csr, lp->dregs + DMA_CSR);
873 }
874
875 lp->init_ring(dev);
876 load_csrs(lp);
877 init_restart_lance(lp);
878 netif_wake_queue(dev);
879 }
880
881 sbus_writew(LE_C0_INEA, lp->lregs + RDP);
882
883 return IRQ_HANDLED;
884 }
885
886 /* Build a fake network packet and send it to ourselves. */
887 static void build_fake_packet(struct lance_private *lp)
888 {
889 struct net_device *dev = lp->dev;
890 int i, entry;
891
892 entry = lp->tx_new & TX_RING_MOD_MASK;
893 if (lp->pio_buffer) {
894 struct lance_init_block __iomem *ib = lp->init_block_iomem;
895 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
896 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
897 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
898 sbus_writew(0, &packet[i]);
899 for (i = 0; i < 6; i++) {
900 sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
901 sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
902 }
903 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
904 sbus_writew(0, &ib->btx_ring[entry].misc);
905 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
906 } else {
907 struct lance_init_block *ib = lp->init_block_mem;
908 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
909 struct ethhdr *eth = (struct ethhdr *) packet;
910 memset(packet, 0, ETH_ZLEN);
911 for (i = 0; i < 6; i++) {
912 eth->h_dest[i] = dev->dev_addr[i];
913 eth->h_source[i] = dev->dev_addr[i];
914 }
915 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
916 ib->btx_ring[entry].misc = 0;
917 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
918 }
919 lp->tx_new = TX_NEXT(entry);
920 }
921
922 struct net_device *last_dev;
923
924 static int lance_open(struct net_device *dev)
925 {
926 struct lance_private *lp = netdev_priv(dev);
927 int status = 0;
928
929 last_dev = dev;
930
931 STOP_LANCE(lp);
932
933 if (request_irq(dev->irq, &lance_interrupt, IRQF_SHARED,
934 lancestr, (void *) dev)) {
935 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
936 return -EAGAIN;
937 }
938
939 /* On the 4m, setup the ledma to provide the upper bits for buffers */
940 if (lp->dregs) {
941 u32 regval = lp->init_block_dvma & 0xff000000;
942
943 sbus_writel(regval, lp->dregs + DMA_TEST);
944 }
945
946 /* Set mode and clear multicast filter only at device open,
947 * so that lance_init_ring() called at any error will not
948 * forget multicast filters.
949 *
950 * BTW it is common bug in all lance drivers! --ANK
951 */
952 if (lp->pio_buffer) {
953 struct lance_init_block __iomem *ib = lp->init_block_iomem;
954 sbus_writew(0, &ib->mode);
955 sbus_writel(0, &ib->filter[0]);
956 sbus_writel(0, &ib->filter[1]);
957 } else {
958 struct lance_init_block *ib = lp->init_block_mem;
959 ib->mode = 0;
960 ib->filter [0] = 0;
961 ib->filter [1] = 0;
962 }
963
964 lp->init_ring(dev);
965 load_csrs(lp);
966
967 netif_start_queue(dev);
968
969 status = init_restart_lance(lp);
970 if (!status && lp->auto_select) {
971 build_fake_packet(lp);
972 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
973 }
974
975 return status;
976 }
977
978 static int lance_close(struct net_device *dev)
979 {
980 struct lance_private *lp = netdev_priv(dev);
981
982 netif_stop_queue(dev);
983 del_timer_sync(&lp->multicast_timer);
984
985 STOP_LANCE(lp);
986
987 free_irq(dev->irq, (void *) dev);
988 return 0;
989 }
990
991 static int lance_reset(struct net_device *dev)
992 {
993 struct lance_private *lp = netdev_priv(dev);
994 int status;
995
996 STOP_LANCE(lp);
997
998 /* On the 4m, reset the dma too */
999 if (lp->dregs) {
1000 u32 csr, addr;
1001
1002 printk(KERN_ERR "resetting ledma\n");
1003 csr = sbus_readl(lp->dregs + DMA_CSR);
1004 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1005 udelay(200);
1006 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1007
1008 addr = lp->init_block_dvma & 0xff000000;
1009 sbus_writel(addr, lp->dregs + DMA_TEST);
1010 }
1011 lp->init_ring(dev);
1012 load_csrs(lp);
1013 dev->trans_start = jiffies;
1014 status = init_restart_lance(lp);
1015 return status;
1016 }
1017
1018 static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1019 {
1020 void __iomem *piobuf = dest;
1021 u32 *p32;
1022 u16 *p16;
1023 u8 *p8;
1024
1025 switch ((unsigned long)src & 0x3) {
1026 case 0:
1027 p32 = (u32 *) src;
1028 while (len >= 4) {
1029 sbus_writel(*p32, piobuf);
1030 p32++;
1031 piobuf += 4;
1032 len -= 4;
1033 }
1034 src = (char *) p32;
1035 break;
1036 case 1:
1037 case 3:
1038 p8 = (u8 *) src;
1039 while (len >= 4) {
1040 u32 val;
1041
1042 val = p8[0] << 24;
1043 val |= p8[1] << 16;
1044 val |= p8[2] << 8;
1045 val |= p8[3];
1046 sbus_writel(val, piobuf);
1047 p8 += 4;
1048 piobuf += 4;
1049 len -= 4;
1050 }
1051 src = (char *) p8;
1052 break;
1053 case 2:
1054 p16 = (u16 *) src;
1055 while (len >= 4) {
1056 u32 val = p16[0]<<16 | p16[1];
1057 sbus_writel(val, piobuf);
1058 p16 += 2;
1059 piobuf += 4;
1060 len -= 4;
1061 }
1062 src = (char *) p16;
1063 break;
1064 };
1065 if (len >= 2) {
1066 u16 val = src[0] << 8 | src[1];
1067 sbus_writew(val, piobuf);
1068 src += 2;
1069 piobuf += 2;
1070 len -= 2;
1071 }
1072 if (len >= 1)
1073 sbus_writeb(src[0], piobuf);
1074 }
1075
1076 static void lance_piozero(void __iomem *dest, int len)
1077 {
1078 void __iomem *piobuf = dest;
1079
1080 if ((unsigned long)piobuf & 1) {
1081 sbus_writeb(0, piobuf);
1082 piobuf += 1;
1083 len -= 1;
1084 if (len == 0)
1085 return;
1086 }
1087 if (len == 1) {
1088 sbus_writeb(0, piobuf);
1089 return;
1090 }
1091 if ((unsigned long)piobuf & 2) {
1092 sbus_writew(0, piobuf);
1093 piobuf += 2;
1094 len -= 2;
1095 if (len == 0)
1096 return;
1097 }
1098 while (len >= 4) {
1099 sbus_writel(0, piobuf);
1100 piobuf += 4;
1101 len -= 4;
1102 }
1103 if (len >= 2) {
1104 sbus_writew(0, piobuf);
1105 piobuf += 2;
1106 len -= 2;
1107 }
1108 if (len >= 1)
1109 sbus_writeb(0, piobuf);
1110 }
1111
1112 static void lance_tx_timeout(struct net_device *dev)
1113 {
1114 struct lance_private *lp = netdev_priv(dev);
1115
1116 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1117 dev->name, sbus_readw(lp->lregs + RDP));
1118 lance_reset(dev);
1119 netif_wake_queue(dev);
1120 }
1121
1122 static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1123 {
1124 struct lance_private *lp = netdev_priv(dev);
1125 int entry, skblen, len;
1126
1127 skblen = skb->len;
1128
1129 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1130
1131 spin_lock_irq(&lp->lock);
1132
1133 lp->stats.tx_bytes += len;
1134
1135 entry = lp->tx_new & TX_RING_MOD_MASK;
1136 if (lp->pio_buffer) {
1137 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1138 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1139 sbus_writew(0, &ib->btx_ring[entry].misc);
1140 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1141 if (len != skblen)
1142 lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1143 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1144 } else {
1145 struct lance_init_block *ib = lp->init_block_mem;
1146 ib->btx_ring [entry].length = (-len) | 0xf000;
1147 ib->btx_ring [entry].misc = 0;
1148 memcpy((char *)&ib->tx_buf [entry][0], skb->data, skblen);
1149 if (len != skblen)
1150 memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1151 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1152 }
1153
1154 lp->tx_new = TX_NEXT(entry);
1155
1156 if (TX_BUFFS_AVAIL <= 0)
1157 netif_stop_queue(dev);
1158
1159 /* Kick the lance: transmit now */
1160 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1161
1162 /* Read back CSR to invalidate the E-Cache.
1163 * This is needed, because DMA_DSBL_WR_INV is set.
1164 */
1165 if (lp->dregs)
1166 sbus_readw(lp->lregs + RDP);
1167
1168 spin_unlock_irq(&lp->lock);
1169
1170 dev->trans_start = jiffies;
1171 dev_kfree_skb(skb);
1172
1173 return 0;
1174 }
1175
1176 static struct net_device_stats *lance_get_stats(struct net_device *dev)
1177 {
1178 struct lance_private *lp = netdev_priv(dev);
1179
1180 return &lp->stats;
1181 }
1182
1183 /* taken from the depca driver */
1184 static void lance_load_multicast(struct net_device *dev)
1185 {
1186 struct lance_private *lp = netdev_priv(dev);
1187 struct dev_mc_list *dmi = dev->mc_list;
1188 char *addrs;
1189 int i;
1190 u32 crc;
1191 u32 val;
1192
1193 /* set all multicast bits */
1194 if (dev->flags & IFF_ALLMULTI)
1195 val = ~0;
1196 else
1197 val = 0;
1198
1199 if (lp->pio_buffer) {
1200 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1201 sbus_writel(val, &ib->filter[0]);
1202 sbus_writel(val, &ib->filter[1]);
1203 } else {
1204 struct lance_init_block *ib = lp->init_block_mem;
1205 ib->filter [0] = val;
1206 ib->filter [1] = val;
1207 }
1208
1209 if (dev->flags & IFF_ALLMULTI)
1210 return;
1211
1212 /* Add addresses */
1213 for (i = 0; i < dev->mc_count; i++) {
1214 addrs = dmi->dmi_addr;
1215 dmi = dmi->next;
1216
1217 /* multicast address? */
1218 if (!(*addrs & 1))
1219 continue;
1220 crc = ether_crc_le(6, addrs);
1221 crc = crc >> 26;
1222 if (lp->pio_buffer) {
1223 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1224 u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1225 u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1226 tmp |= 1 << (crc & 0xf);
1227 sbus_writew(tmp, &mcast_table[crc>>4]);
1228 } else {
1229 struct lance_init_block *ib = lp->init_block_mem;
1230 u16 *mcast_table = (u16 *) &ib->filter;
1231 mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1232 }
1233 }
1234 }
1235
1236 static void lance_set_multicast(struct net_device *dev)
1237 {
1238 struct lance_private *lp = netdev_priv(dev);
1239 struct lance_init_block *ib_mem = lp->init_block_mem;
1240 struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1241 u16 mode;
1242
1243 if (!netif_running(dev))
1244 return;
1245
1246 if (lp->tx_old != lp->tx_new) {
1247 mod_timer(&lp->multicast_timer, jiffies + 4);
1248 netif_wake_queue(dev);
1249 return;
1250 }
1251
1252 netif_stop_queue(dev);
1253
1254 STOP_LANCE(lp);
1255 lp->init_ring(dev);
1256
1257 if (lp->pio_buffer)
1258 mode = sbus_readw(&ib_iomem->mode);
1259 else
1260 mode = ib_mem->mode;
1261 if (dev->flags & IFF_PROMISC) {
1262 mode |= LE_MO_PROM;
1263 if (lp->pio_buffer)
1264 sbus_writew(mode, &ib_iomem->mode);
1265 else
1266 ib_mem->mode = mode;
1267 } else {
1268 mode &= ~LE_MO_PROM;
1269 if (lp->pio_buffer)
1270 sbus_writew(mode, &ib_iomem->mode);
1271 else
1272 ib_mem->mode = mode;
1273 lance_load_multicast(dev);
1274 }
1275 load_csrs(lp);
1276 init_restart_lance(lp);
1277 netif_wake_queue(dev);
1278 }
1279
1280 static void lance_set_multicast_retry(unsigned long _opaque)
1281 {
1282 struct net_device *dev = (struct net_device *) _opaque;
1283
1284 lance_set_multicast(dev);
1285 }
1286
1287 static void lance_free_hwresources(struct lance_private *lp)
1288 {
1289 if (lp->lregs)
1290 sbus_iounmap(lp->lregs, LANCE_REG_SIZE);
1291 if (lp->init_block_iomem) {
1292 sbus_iounmap(lp->init_block_iomem,
1293 sizeof(struct lance_init_block));
1294 } else if (lp->init_block_mem) {
1295 sbus_free_consistent(lp->sdev,
1296 sizeof(struct lance_init_block),
1297 lp->init_block_mem,
1298 lp->init_block_dvma);
1299 }
1300 }
1301
1302 /* Ethtool support... */
1303 static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1304 {
1305 struct lance_private *lp = netdev_priv(dev);
1306
1307 strcpy(info->driver, "sunlance");
1308 strcpy(info->version, "2.02");
1309 sprintf(info->bus_info, "SBUS:%d",
1310 lp->sdev->slot);
1311 }
1312
1313 static u32 sparc_lance_get_link(struct net_device *dev)
1314 {
1315 /* We really do not keep track of this, but this
1316 * is better than not reporting anything at all.
1317 */
1318 return 1;
1319 }
1320
1321 static const struct ethtool_ops sparc_lance_ethtool_ops = {
1322 .get_drvinfo = sparc_lance_get_drvinfo,
1323 .get_link = sparc_lance_get_link,
1324 };
1325
1326 static int __devinit sparc_lance_probe_one(struct sbus_dev *sdev,
1327 struct sbus_dma *ledma,
1328 struct sbus_dev *lebuffer)
1329 {
1330 static unsigned version_printed;
1331 struct net_device *dev;
1332 struct lance_private *lp;
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 memset(lp, 0, sizeof(*lp));
1341
1342 if (sparc_lance_debug && version_printed++ == 0)
1343 printk (KERN_INFO "%s", version);
1344
1345 spin_lock_init(&lp->lock);
1346
1347 /* Copy the IDPROM ethernet address to the device structure, later we
1348 * will copy the address in the device structure to the lance
1349 * initialization block.
1350 */
1351 for (i = 0; i < 6; i++)
1352 dev->dev_addr[i] = idprom->id_ethaddr[i];
1353
1354 /* Get the IO region */
1355 lp->lregs = sbus_ioremap(&sdev->resource[0], 0,
1356 LANCE_REG_SIZE, lancestr);
1357 if (!lp->lregs) {
1358 printk(KERN_ERR "SunLance: Cannot map registers.\n");
1359 goto fail;
1360 }
1361
1362 lp->sdev = sdev;
1363 if (lebuffer) {
1364 /* sanity check */
1365 if (lebuffer->resource[0].start & 7) {
1366 printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1367 goto fail;
1368 }
1369 lp->init_block_iomem =
1370 sbus_ioremap(&lebuffer->resource[0], 0,
1371 sizeof(struct lance_init_block), "lebuffer");
1372 if (!lp->init_block_iomem) {
1373 printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1374 goto fail;
1375 }
1376 lp->init_block_dvma = 0;
1377 lp->pio_buffer = 1;
1378 lp->init_ring = lance_init_ring_pio;
1379 lp->rx = lance_rx_pio;
1380 lp->tx = lance_tx_pio;
1381 } else {
1382 lp->init_block_mem =
1383 sbus_alloc_consistent(sdev, sizeof(struct lance_init_block),
1384 &lp->init_block_dvma);
1385 if (!lp->init_block_mem || lp->init_block_dvma == 0) {
1386 printk(KERN_ERR "SunLance: Cannot allocate consistent DMA memory.\n");
1387 goto fail;
1388 }
1389 lp->pio_buffer = 0;
1390 lp->init_ring = lance_init_ring_dvma;
1391 lp->rx = lance_rx_dvma;
1392 lp->tx = lance_tx_dvma;
1393 }
1394 lp->busmaster_regval = prom_getintdefault(sdev->prom_node,
1395 "busmaster-regval",
1396 (LE_C3_BSWP | LE_C3_ACON |
1397 LE_C3_BCON));
1398
1399 lp->name = lancestr;
1400 lp->ledma = ledma;
1401
1402 lp->burst_sizes = 0;
1403 if (lp->ledma) {
1404 char prop[6];
1405 unsigned int sbmask;
1406 u32 csr;
1407
1408 /* Find burst-size property for ledma */
1409 lp->burst_sizes = prom_getintdefault(ledma->sdev->prom_node,
1410 "burst-sizes", 0);
1411
1412 /* ledma may be capable of fast bursts, but sbus may not. */
1413 sbmask = prom_getintdefault(ledma->sdev->bus->prom_node,
1414 "burst-sizes", DMA_BURSTBITS);
1415 lp->burst_sizes &= sbmask;
1416
1417 /* Get the cable-selection property */
1418 memset(prop, 0, sizeof(prop));
1419 prom_getstring(ledma->sdev->prom_node, "cable-selection",
1420 prop, sizeof(prop));
1421 if (prop[0] == 0) {
1422 int topnd, nd;
1423
1424 printk(KERN_INFO "SunLance: using auto-carrier-detection.\n");
1425
1426 /* Is this found at /options .attributes in all
1427 * Prom versions? XXX
1428 */
1429 topnd = prom_getchild(prom_root_node);
1430
1431 nd = prom_searchsiblings(topnd, "options");
1432 if (!nd)
1433 goto no_link_test;
1434
1435 if (!prom_node_has_property(nd, "tpe-link-test?"))
1436 goto no_link_test;
1437
1438 memset(prop, 0, sizeof(prop));
1439 prom_getstring(nd, "tpe-link-test?", prop,
1440 sizeof(prop));
1441
1442 if (strcmp(prop, "true")) {
1443 printk(KERN_NOTICE "SunLance: warning: overriding option "
1444 "'tpe-link-test?'\n");
1445 printk(KERN_NOTICE "SunLance: warning: mail any problems "
1446 "to ecd@skynet.be\n");
1447 auxio_set_lte(AUXIO_LTE_ON);
1448 }
1449 no_link_test:
1450 lp->auto_select = 1;
1451 lp->tpe = 0;
1452 } else if (!strcmp(prop, "aui")) {
1453 lp->auto_select = 0;
1454 lp->tpe = 0;
1455 } else {
1456 lp->auto_select = 0;
1457 lp->tpe = 1;
1458 }
1459
1460 lp->dregs = ledma->regs;
1461
1462 /* Reset ledma */
1463 csr = sbus_readl(lp->dregs + DMA_CSR);
1464 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1465 udelay(200);
1466 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1467 } else
1468 lp->dregs = NULL;
1469
1470 lp->dev = dev;
1471 SET_MODULE_OWNER(dev);
1472 SET_NETDEV_DEV(dev, &sdev->ofdev.dev);
1473 dev->open = &lance_open;
1474 dev->stop = &lance_close;
1475 dev->hard_start_xmit = &lance_start_xmit;
1476 dev->tx_timeout = &lance_tx_timeout;
1477 dev->watchdog_timeo = 5*HZ;
1478 dev->get_stats = &lance_get_stats;
1479 dev->set_multicast_list = &lance_set_multicast;
1480 dev->ethtool_ops = &sparc_lance_ethtool_ops;
1481
1482 dev->irq = sdev->irqs[0];
1483
1484 dev->dma = 0;
1485
1486 /* We cannot sleep if the chip is busy during a
1487 * multicast list update event, because such events
1488 * can occur from interrupts (ex. IPv6). So we
1489 * use a timer to try again later when necessary. -DaveM
1490 */
1491 init_timer(&lp->multicast_timer);
1492 lp->multicast_timer.data = (unsigned long) dev;
1493 lp->multicast_timer.function = &lance_set_multicast_retry;
1494
1495 if (register_netdev(dev)) {
1496 printk(KERN_ERR "SunLance: Cannot register device.\n");
1497 goto fail;
1498 }
1499
1500 dev_set_drvdata(&sdev->ofdev.dev, lp);
1501
1502 printk(KERN_INFO "%s: LANCE ", dev->name);
1503
1504 for (i = 0; i < 6; i++)
1505 printk("%2.2x%c", dev->dev_addr[i],
1506 i == 5 ? ' ': ':');
1507 printk("\n");
1508
1509 return 0;
1510
1511 fail:
1512 lance_free_hwresources(lp);
1513 free_netdev(dev);
1514 return -ENODEV;
1515 }
1516
1517 /* On 4m, find the associated dma for the lance chip */
1518 static struct sbus_dma * __devinit find_ledma(struct sbus_dev *sdev)
1519 {
1520 struct sbus_dma *p;
1521
1522 for_each_dvma(p) {
1523 if (p->sdev == sdev)
1524 return p;
1525 }
1526 return NULL;
1527 }
1528
1529 #ifdef CONFIG_SUN4
1530
1531 #include <asm/sun4paddr.h>
1532 #include <asm/machines.h>
1533
1534 /* Find all the lance cards on the system and initialize them */
1535 static struct sbus_dev sun4_sdev;
1536 static int __devinit sparc_lance_init(void)
1537 {
1538 if ((idprom->id_machtype == (SM_SUN4|SM_4_330)) ||
1539 (idprom->id_machtype == (SM_SUN4|SM_4_470))) {
1540 memset(&sun4_sdev, 0, sizeof(struct sbus_dev));
1541 sun4_sdev.reg_addrs[0].phys_addr = sun4_eth_physaddr;
1542 sun4_sdev.irqs[0] = 6;
1543 return sparc_lance_probe_one(&sun4_sdev, NULL, NULL);
1544 }
1545 return -ENODEV;
1546 }
1547
1548 static int __exit sunlance_sun4_remove(void)
1549 {
1550 struct lance_private *lp = dev_get_drvdata(&sun4_sdev.ofdev.dev);
1551 struct net_device *net_dev = lp->dev;
1552
1553 unregister_netdevice(net_dev);
1554
1555 lance_free_hwresources(lp);
1556
1557 free_netdev(net_dev);
1558
1559 dev_set_drvdata(&sun4_sdev.ofdev.dev, NULL);
1560
1561 return 0;
1562 }
1563
1564 #else /* !CONFIG_SUN4 */
1565
1566 static int __devinit sunlance_sbus_probe(struct of_device *dev, const struct of_device_id *match)
1567 {
1568 struct sbus_dev *sdev = to_sbus_device(&dev->dev);
1569 int err;
1570
1571 if (sdev->parent) {
1572 struct of_device *parent = &sdev->parent->ofdev;
1573
1574 if (!strcmp(parent->node->name, "ledma")) {
1575 struct sbus_dma *ledma = find_ledma(to_sbus_device(&parent->dev));
1576
1577 err = sparc_lance_probe_one(sdev, ledma, NULL);
1578 } else if (!strcmp(parent->node->name, "lebuffer")) {
1579 err = sparc_lance_probe_one(sdev, NULL, to_sbus_device(&parent->dev));
1580 } else
1581 err = sparc_lance_probe_one(sdev, NULL, NULL);
1582 } else
1583 err = sparc_lance_probe_one(sdev, NULL, NULL);
1584
1585 return err;
1586 }
1587
1588 static int __devexit sunlance_sbus_remove(struct of_device *dev)
1589 {
1590 struct lance_private *lp = dev_get_drvdata(&dev->dev);
1591 struct net_device *net_dev = lp->dev;
1592
1593 unregister_netdevice(net_dev);
1594
1595 lance_free_hwresources(lp);
1596
1597 free_netdev(net_dev);
1598
1599 dev_set_drvdata(&dev->dev, NULL);
1600
1601 return 0;
1602 }
1603
1604 static struct of_device_id sunlance_sbus_match[] = {
1605 {
1606 .name = "le",
1607 },
1608 {},
1609 };
1610
1611 MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1612
1613 static struct of_platform_driver sunlance_sbus_driver = {
1614 .name = "sunlance",
1615 .match_table = sunlance_sbus_match,
1616 .probe = sunlance_sbus_probe,
1617 .remove = __devexit_p(sunlance_sbus_remove),
1618 };
1619
1620
1621 /* Find all the lance cards on the system and initialize them */
1622 static int __init sparc_lance_init(void)
1623 {
1624 return of_register_driver(&sunlance_sbus_driver, &sbus_bus_type);
1625 }
1626 #endif /* !CONFIG_SUN4 */
1627
1628 static void __exit sparc_lance_exit(void)
1629 {
1630 #ifdef CONFIG_SUN4
1631 sunlance_sun4_remove();
1632 #else
1633 of_unregister_driver(&sunlance_sbus_driver);
1634 #endif
1635 }
1636
1637 module_init(sparc_lance_init);
1638 module_exit(sparc_lance_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree