1 // SPDX-License-Identifier: GPL-2.0-only
2 /* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
3 * lance.c: Linux/Sparc/Lance driver
4 *
5 * Written 1995, 1996 by Miguel de Icaza
6 * Sources:
7 * The Linux depca driver
8 * The Linux lance driver.
9 * The Linux skeleton driver.
10 * The NetBSD Sparc/Lance driver.
11 * Theo de Raadt (deraadt@openbsd.org)
12 * NCR92C990 Lan Controller manual
13 *
14 * 1.4:
15 * Added support to run with a ledma on the Sun4m
16 *
17 * 1.5:
18 * Added multiple card detection.
19 *
20 * 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
21 * (ecd@skynet.be)
22 *
23 * 5/15/96: auto carrier detection on sun4m by Eddie C. Dost
24 * (ecd@skynet.be)
25 *
26 * 5/17/96: lebuffer on scsi/ether cards now work David S. Miller
27 * (davem@caip.rutgers.edu)
28 *
29 * 5/29/96: override option 'tpe-link-test?', if it is 'false', as
30 * this disables auto carrier detection on sun4m. Eddie C. Dost
31 * (ecd@skynet.be)
32 *
33 * 1.7:
34 * 6/26/96: Bug fix for multiple ledmas, miguel.
35 *
36 * 1.8:
37 * Stole multicast code from depca.c, fixed lance_tx.
38 *
39 * 1.9:
40 * 8/21/96: Fixed the multicast code (Pedro Roque)
41 *
42 * 8/28/96: Send fake packet in lance_open() if auto_select is true,
43 * so we can detect the carrier loss condition in time.
44 * Eddie C. Dost (ecd@skynet.be)
45 *
46 * 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
47 * MNA trap during chksum_partial_copy(). (ecd@skynet.be)
48 *
49 * 11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
50 *
51 * 12/22/96: Don't loop forever in lance_rx() on incomplete packets.
52 * This was the sun4c killer. Shit, stupid bug.
53 * (ecd@skynet.be)
54 *
55 * 1.10:
56 * 1/26/97: Modularize driver. (ecd@skynet.be)
57 *
58 * 1.11:
59 * 12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
60 *
61 * 1.12:
62 * 11/3/99: Fixed SMP race in lance_start_xmit found by davem.
63 * Anton Blanchard (anton@progsoc.uts.edu.au)
64 * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
65 * David S. Miller (davem@redhat.com)
66 * 2.01:
67 * 11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
68 *
69 */
70
71 #undef DEBUG_DRIVER
72
73 static char lancestr[] = "LANCE";
74
75 #include <linux/module.h>
76 #include <linux/kernel.h>
77 #include <linux/types.h>
78 #include <linux/fcntl.h>
79 #include <linux/interrupt.h>
80 #include <linux/ioport.h>
81 #include <linux/in.h>
82 #include <linux/string.h>
83 #include <linux/delay.h>
84 #include <linux/crc32.h>
85 #include <linux/errno.h>
86 #include <linux/socket.h> /* Used for the temporal inet entries and routing */
87 #include <linux/route.h>
88 #include <linux/netdevice.h>
89 #include <linux/etherdevice.h>
90 #include <linux/skbuff.h>
91 #include <linux/ethtool.h>
92 #include <linux/bitops.h>
93 #include <linux/dma-mapping.h>
94 #include <linux/of.h>
95 #include <linux/of_device.h>
96 #include <linux/gfp.h>
97
98 #include <asm/io.h>
99 #include <asm/dma.h>
100 #include <asm/pgtable.h>
101 #include <asm/byteorder.h> /* Used by the checksum routines */
102 #include <asm/idprom.h>
103 #include <asm/prom.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 platform_device *ledma; /* If set this points to ledma */
253 char tpe; /* cable-selection is TPE */
254 char auto_select; /* cable-selection by carrier */
255 char burst_sizes; /* ledma SBus burst sizes */
256 char pio_buffer; /* init block in PIO space? */
257
258 unsigned short busmaster_regval;
259
260 void (*init_ring)(struct net_device *);
261 void (*rx)(struct net_device *);
262 void (*tx)(struct net_device *);
263
264 char *name;
265 dma_addr_t init_block_dvma;
266 struct net_device *dev; /* Backpointer */
267 struct platform_device *op;
268 struct platform_device *lebuffer;
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 */
load_csrs(struct lance_private * lp)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 */
lance_init_ring_dvma(struct net_device * dev)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
lance_init_ring_pio(struct net_device * dev)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
init_restart_ledma(struct lance_private * lp)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
init_restart_lance(struct lance_private * lp)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
lance_rx_dvma(struct net_device * dev)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 dev->stats.rx_over_errors++;
524 dev->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) dev->stats.rx_fifo_errors++;
530 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
531 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
532 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
533 if (bits & LE_R1_EOP) dev->stats.rx_errors++;
534 } else {
535 len = (rd->mblength & 0xfff) - 4;
536 skb = netdev_alloc_skb(dev, len + 2);
537
538 if (skb == NULL) {
539 dev->stats.rx_dropped++;
540 rd->mblength = 0;
541 rd->rmd1_bits = LE_R1_OWN;
542 lp->rx_new = RX_NEXT(entry);
543 return;
544 }
545
546 dev->stats.rx_bytes += len;
547
548 skb_reserve(skb, 2); /* 16 byte align */
549 skb_put(skb, len); /* make room */
550 skb_copy_to_linear_data(skb,
551 (unsigned char *)&(ib->rx_buf [entry][0]),
552 len);
553 skb->protocol = eth_type_trans(skb, dev);
554 netif_rx(skb);
555 dev->stats.rx_packets++;
556 }
557
558 /* Return the packet to the pool */
559 rd->mblength = 0;
560 rd->rmd1_bits = LE_R1_OWN;
561 entry = RX_NEXT(entry);
562 }
563
564 lp->rx_new = entry;
565 }
566
lance_tx_dvma(struct net_device * dev)567 static void lance_tx_dvma(struct net_device *dev)
568 {
569 struct lance_private *lp = netdev_priv(dev);
570 struct lance_init_block *ib = lp->init_block_mem;
571 int i, j;
572
573 spin_lock(&lp->lock);
574
575 j = lp->tx_old;
576 for (i = j; i != lp->tx_new; i = j) {
577 struct lance_tx_desc *td = &ib->btx_ring [i];
578 u8 bits = td->tmd1_bits;
579
580 /* If we hit a packet not owned by us, stop */
581 if (bits & LE_T1_OWN)
582 break;
583
584 if (bits & LE_T1_ERR) {
585 u16 status = td->misc;
586
587 dev->stats.tx_errors++;
588 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
589 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
590
591 if (status & LE_T3_CLOS) {
592 dev->stats.tx_carrier_errors++;
593 if (lp->auto_select) {
594 lp->tpe = 1 - lp->tpe;
595 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
596 dev->name, lp->tpe?"TPE":"AUI");
597 STOP_LANCE(lp);
598 lp->init_ring(dev);
599 load_csrs(lp);
600 init_restart_lance(lp);
601 goto out;
602 }
603 }
604
605 /* Buffer errors and underflows turn off the
606 * transmitter, restart the adapter.
607 */
608 if (status & (LE_T3_BUF|LE_T3_UFL)) {
609 dev->stats.tx_fifo_errors++;
610
611 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
612 dev->name);
613 STOP_LANCE(lp);
614 lp->init_ring(dev);
615 load_csrs(lp);
616 init_restart_lance(lp);
617 goto out;
618 }
619 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
620 /*
621 * So we don't count the packet more than once.
622 */
623 td->tmd1_bits = bits & ~(LE_T1_POK);
624
625 /* One collision before packet was sent. */
626 if (bits & LE_T1_EONE)
627 dev->stats.collisions++;
628
629 /* More than one collision, be optimistic. */
630 if (bits & LE_T1_EMORE)
631 dev->stats.collisions += 2;
632
633 dev->stats.tx_packets++;
634 }
635
636 j = TX_NEXT(j);
637 }
638 lp->tx_old = j;
639 out:
640 if (netif_queue_stopped(dev) &&
641 TX_BUFFS_AVAIL > 0)
642 netif_wake_queue(dev);
643
644 spin_unlock(&lp->lock);
645 }
646
lance_piocopy_to_skb(struct sk_buff * skb,void __iomem * piobuf,int len)647 static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
648 {
649 u16 *p16 = (u16 *) skb->data;
650 u32 *p32;
651 u8 *p8;
652 void __iomem *pbuf = piobuf;
653
654 /* We know here that both src and dest are on a 16bit boundary. */
655 *p16++ = sbus_readw(pbuf);
656 p32 = (u32 *) p16;
657 pbuf += 2;
658 len -= 2;
659
660 while (len >= 4) {
661 *p32++ = sbus_readl(pbuf);
662 pbuf += 4;
663 len -= 4;
664 }
665 p8 = (u8 *) p32;
666 if (len >= 2) {
667 p16 = (u16 *) p32;
668 *p16++ = sbus_readw(pbuf);
669 pbuf += 2;
670 len -= 2;
671 p8 = (u8 *) p16;
672 }
673 if (len >= 1)
674 *p8 = sbus_readb(pbuf);
675 }
676
lance_rx_pio(struct net_device * dev)677 static void lance_rx_pio(struct net_device *dev)
678 {
679 struct lance_private *lp = netdev_priv(dev);
680 struct lance_init_block __iomem *ib = lp->init_block_iomem;
681 struct lance_rx_desc __iomem *rd;
682 unsigned char bits;
683 int len, entry;
684 struct sk_buff *skb;
685
686 entry = lp->rx_new;
687 for (rd = &ib->brx_ring [entry];
688 !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
689 rd = &ib->brx_ring [entry]) {
690
691 /* We got an incomplete frame? */
692 if ((bits & LE_R1_POK) != LE_R1_POK) {
693 dev->stats.rx_over_errors++;
694 dev->stats.rx_errors++;
695 } else if (bits & LE_R1_ERR) {
696 /* Count only the end frame as a rx error,
697 * not the beginning
698 */
699 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
700 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
701 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
702 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
703 if (bits & LE_R1_EOP) dev->stats.rx_errors++;
704 } else {
705 len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
706 skb = netdev_alloc_skb(dev, len + 2);
707
708 if (skb == NULL) {
709 dev->stats.rx_dropped++;
710 sbus_writew(0, &rd->mblength);
711 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
712 lp->rx_new = RX_NEXT(entry);
713 return;
714 }
715
716 dev->stats.rx_bytes += len;
717
718 skb_reserve (skb, 2); /* 16 byte align */
719 skb_put(skb, len); /* make room */
720 lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
721 skb->protocol = eth_type_trans(skb, dev);
722 netif_rx(skb);
723 dev->stats.rx_packets++;
724 }
725
726 /* Return the packet to the pool */
727 sbus_writew(0, &rd->mblength);
728 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
729 entry = RX_NEXT(entry);
730 }
731
732 lp->rx_new = entry;
733 }
734
lance_tx_pio(struct net_device * dev)735 static void lance_tx_pio(struct net_device *dev)
736 {
737 struct lance_private *lp = netdev_priv(dev);
738 struct lance_init_block __iomem *ib = lp->init_block_iomem;
739 int i, j;
740
741 spin_lock(&lp->lock);
742
743 j = lp->tx_old;
744 for (i = j; i != lp->tx_new; i = j) {
745 struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
746 u8 bits = sbus_readb(&td->tmd1_bits);
747
748 /* If we hit a packet not owned by us, stop */
749 if (bits & LE_T1_OWN)
750 break;
751
752 if (bits & LE_T1_ERR) {
753 u16 status = sbus_readw(&td->misc);
754
755 dev->stats.tx_errors++;
756 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
757 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
758
759 if (status & LE_T3_CLOS) {
760 dev->stats.tx_carrier_errors++;
761 if (lp->auto_select) {
762 lp->tpe = 1 - lp->tpe;
763 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
764 dev->name, lp->tpe?"TPE":"AUI");
765 STOP_LANCE(lp);
766 lp->init_ring(dev);
767 load_csrs(lp);
768 init_restart_lance(lp);
769 goto out;
770 }
771 }
772
773 /* Buffer errors and underflows turn off the
774 * transmitter, restart the adapter.
775 */
776 if (status & (LE_T3_BUF|LE_T3_UFL)) {
777 dev->stats.tx_fifo_errors++;
778
779 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
780 dev->name);
781 STOP_LANCE(lp);
782 lp->init_ring(dev);
783 load_csrs(lp);
784 init_restart_lance(lp);
785 goto out;
786 }
787 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
788 /*
789 * So we don't count the packet more than once.
790 */
791 sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
792
793 /* One collision before packet was sent. */
794 if (bits & LE_T1_EONE)
795 dev->stats.collisions++;
796
797 /* More than one collision, be optimistic. */
798 if (bits & LE_T1_EMORE)
799 dev->stats.collisions += 2;
800
801 dev->stats.tx_packets++;
802 }
803
804 j = TX_NEXT(j);
805 }
806 lp->tx_old = j;
807
808 if (netif_queue_stopped(dev) &&
809 TX_BUFFS_AVAIL > 0)
810 netif_wake_queue(dev);
811 out:
812 spin_unlock(&lp->lock);
813 }
814
lance_interrupt(int irq,void * dev_id)815 static irqreturn_t lance_interrupt(int irq, void *dev_id)
816 {
817 struct net_device *dev = dev_id;
818 struct lance_private *lp = netdev_priv(dev);
819 int csr0;
820
821 sbus_writew(LE_CSR0, lp->lregs + RAP);
822 csr0 = sbus_readw(lp->lregs + RDP);
823
824 /* Acknowledge all the interrupt sources ASAP */
825 sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
826 lp->lregs + RDP);
827
828 if ((csr0 & LE_C0_ERR) != 0) {
829 /* Clear the error condition */
830 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
831 LE_C0_CERR | LE_C0_MERR),
832 lp->lregs + RDP);
833 }
834
835 if (csr0 & LE_C0_RINT)
836 lp->rx(dev);
837
838 if (csr0 & LE_C0_TINT)
839 lp->tx(dev);
840
841 if (csr0 & LE_C0_BABL)
842 dev->stats.tx_errors++;
843
844 if (csr0 & LE_C0_MISS)
845 dev->stats.rx_errors++;
846
847 if (csr0 & LE_C0_MERR) {
848 if (lp->dregs) {
849 u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
850
851 printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
852 dev->name, csr0, addr & 0xffffff);
853 } else {
854 printk(KERN_ERR "%s: Memory error, status %04x\n",
855 dev->name, csr0);
856 }
857
858 sbus_writew(LE_C0_STOP, lp->lregs + RDP);
859
860 if (lp->dregs) {
861 u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
862
863 dma_csr |= DMA_FIFO_INV;
864 sbus_writel(dma_csr, lp->dregs + DMA_CSR);
865 }
866
867 lp->init_ring(dev);
868 load_csrs(lp);
869 init_restart_lance(lp);
870 netif_wake_queue(dev);
871 }
872
873 sbus_writew(LE_C0_INEA, lp->lregs + RDP);
874
875 return IRQ_HANDLED;
876 }
877
878 /* Build a fake network packet and send it to ourselves. */
build_fake_packet(struct lance_private * lp)879 static void build_fake_packet(struct lance_private *lp)
880 {
881 struct net_device *dev = lp->dev;
882 int i, entry;
883
884 entry = lp->tx_new & TX_RING_MOD_MASK;
885 if (lp->pio_buffer) {
886 struct lance_init_block __iomem *ib = lp->init_block_iomem;
887 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
888 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
889 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
890 sbus_writew(0, &packet[i]);
891 for (i = 0; i < 6; i++) {
892 sbus_writeb(dev->dev_addr[i], ð->h_dest[i]);
893 sbus_writeb(dev->dev_addr[i], ð->h_source[i]);
894 }
895 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
896 sbus_writew(0, &ib->btx_ring[entry].misc);
897 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
898 } else {
899 struct lance_init_block *ib = lp->init_block_mem;
900 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
901 struct ethhdr *eth = (struct ethhdr *) packet;
902 memset(packet, 0, ETH_ZLEN);
903 for (i = 0; i < 6; i++) {
904 eth->h_dest[i] = dev->dev_addr[i];
905 eth->h_source[i] = dev->dev_addr[i];
906 }
907 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
908 ib->btx_ring[entry].misc = 0;
909 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
910 }
911 lp->tx_new = TX_NEXT(entry);
912 }
913
lance_open(struct net_device * dev)914 static int lance_open(struct net_device *dev)
915 {
916 struct lance_private *lp = netdev_priv(dev);
917 int status = 0;
918
919 STOP_LANCE(lp);
920
921 if (request_irq(dev->irq, lance_interrupt, IRQF_SHARED,
922 lancestr, (void *) dev)) {
923 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
924 return -EAGAIN;
925 }
926
927 /* On the 4m, setup the ledma to provide the upper bits for buffers */
928 if (lp->dregs) {
929 u32 regval = lp->init_block_dvma & 0xff000000;
930
931 sbus_writel(regval, lp->dregs + DMA_TEST);
932 }
933
934 /* Set mode and clear multicast filter only at device open,
935 * so that lance_init_ring() called at any error will not
936 * forget multicast filters.
937 *
938 * BTW it is common bug in all lance drivers! --ANK
939 */
940 if (lp->pio_buffer) {
941 struct lance_init_block __iomem *ib = lp->init_block_iomem;
942 sbus_writew(0, &ib->mode);
943 sbus_writel(0, &ib->filter[0]);
944 sbus_writel(0, &ib->filter[1]);
945 } else {
946 struct lance_init_block *ib = lp->init_block_mem;
947 ib->mode = 0;
948 ib->filter [0] = 0;
949 ib->filter [1] = 0;
950 }
951
952 lp->init_ring(dev);
953 load_csrs(lp);
954
955 netif_start_queue(dev);
956
957 status = init_restart_lance(lp);
958 if (!status && lp->auto_select) {
959 build_fake_packet(lp);
960 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
961 }
962
963 return status;
964 }
965
lance_close(struct net_device * dev)966 static int lance_close(struct net_device *dev)
967 {
968 struct lance_private *lp = netdev_priv(dev);
969
970 netif_stop_queue(dev);
971 del_timer_sync(&lp->multicast_timer);
972
973 STOP_LANCE(lp);
974
975 free_irq(dev->irq, (void *) dev);
976 return 0;
977 }
978
lance_reset(struct net_device * dev)979 static int lance_reset(struct net_device *dev)
980 {
981 struct lance_private *lp = netdev_priv(dev);
982 int status;
983
984 STOP_LANCE(lp);
985
986 /* On the 4m, reset the dma too */
987 if (lp->dregs) {
988 u32 csr, addr;
989
990 printk(KERN_ERR "resetting ledma\n");
991 csr = sbus_readl(lp->dregs + DMA_CSR);
992 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
993 udelay(200);
994 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
995
996 addr = lp->init_block_dvma & 0xff000000;
997 sbus_writel(addr, lp->dregs + DMA_TEST);
998 }
999 lp->init_ring(dev);
1000 load_csrs(lp);
1001 netif_trans_update(dev); /* prevent tx timeout */
1002 status = init_restart_lance(lp);
1003 return status;
1004 }
1005
lance_piocopy_from_skb(void __iomem * dest,unsigned char * src,int len)1006 static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1007 {
1008 void __iomem *piobuf = dest;
1009 u32 *p32;
1010 u16 *p16;
1011 u8 *p8;
1012
1013 switch ((unsigned long)src & 0x3) {
1014 case 0:
1015 p32 = (u32 *) src;
1016 while (len >= 4) {
1017 sbus_writel(*p32, piobuf);
1018 p32++;
1019 piobuf += 4;
1020 len -= 4;
1021 }
1022 src = (char *) p32;
1023 break;
1024 case 1:
1025 case 3:
1026 p8 = (u8 *) src;
1027 while (len >= 4) {
1028 u32 val;
1029
1030 val = p8[0] << 24;
1031 val |= p8[1] << 16;
1032 val |= p8[2] << 8;
1033 val |= p8[3];
1034 sbus_writel(val, piobuf);
1035 p8 += 4;
1036 piobuf += 4;
1037 len -= 4;
1038 }
1039 src = (char *) p8;
1040 break;
1041 case 2:
1042 p16 = (u16 *) src;
1043 while (len >= 4) {
1044 u32 val = p16[0]<<16 | p16[1];
1045 sbus_writel(val, piobuf);
1046 p16 += 2;
1047 piobuf += 4;
1048 len -= 4;
1049 }
1050 src = (char *) p16;
1051 break;
1052 }
1053 if (len >= 2) {
1054 u16 val = src[0] << 8 | src[1];
1055 sbus_writew(val, piobuf);
1056 src += 2;
1057 piobuf += 2;
1058 len -= 2;
1059 }
1060 if (len >= 1)
1061 sbus_writeb(src[0], piobuf);
1062 }
1063
lance_piozero(void __iomem * dest,int len)1064 static void lance_piozero(void __iomem *dest, int len)
1065 {
1066 void __iomem *piobuf = dest;
1067
1068 if ((unsigned long)piobuf & 1) {
1069 sbus_writeb(0, piobuf);
1070 piobuf += 1;
1071 len -= 1;
1072 if (len == 0)
1073 return;
1074 }
1075 if (len == 1) {
1076 sbus_writeb(0, piobuf);
1077 return;
1078 }
1079 if ((unsigned long)piobuf & 2) {
1080 sbus_writew(0, piobuf);
1081 piobuf += 2;
1082 len -= 2;
1083 if (len == 0)
1084 return;
1085 }
1086 while (len >= 4) {
1087 sbus_writel(0, piobuf);
1088 piobuf += 4;
1089 len -= 4;
1090 }
1091 if (len >= 2) {
1092 sbus_writew(0, piobuf);
1093 piobuf += 2;
1094 len -= 2;
1095 }
1096 if (len >= 1)
1097 sbus_writeb(0, piobuf);
1098 }
1099
lance_tx_timeout(struct net_device * dev)1100 static void lance_tx_timeout(struct net_device *dev)
1101 {
1102 struct lance_private *lp = netdev_priv(dev);
1103
1104 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1105 dev->name, sbus_readw(lp->lregs + RDP));
1106 lance_reset(dev);
1107 netif_wake_queue(dev);
1108 }
1109
lance_start_xmit(struct sk_buff * skb,struct net_device * dev)1110 static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1111 {
1112 struct lance_private *lp = netdev_priv(dev);
1113 int entry, skblen, len;
1114
1115 skblen = skb->len;
1116
1117 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1118
1119 spin_lock_irq(&lp->lock);
1120
1121 dev->stats.tx_bytes += len;
1122
1123 entry = lp->tx_new & TX_RING_MOD_MASK;
1124 if (lp->pio_buffer) {
1125 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1126 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1127 sbus_writew(0, &ib->btx_ring[entry].misc);
1128 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1129 if (len != skblen)
1130 lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1131 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1132 } else {
1133 struct lance_init_block *ib = lp->init_block_mem;
1134 ib->btx_ring [entry].length = (-len) | 0xf000;
1135 ib->btx_ring [entry].misc = 0;
1136 skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1137 if (len != skblen)
1138 memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1139 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1140 }
1141
1142 lp->tx_new = TX_NEXT(entry);
1143
1144 if (TX_BUFFS_AVAIL <= 0)
1145 netif_stop_queue(dev);
1146
1147 /* Kick the lance: transmit now */
1148 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1149
1150 /* Read back CSR to invalidate the E-Cache.
1151 * This is needed, because DMA_DSBL_WR_INV is set.
1152 */
1153 if (lp->dregs)
1154 sbus_readw(lp->lregs + RDP);
1155
1156 spin_unlock_irq(&lp->lock);
1157
1158 dev_kfree_skb(skb);
1159
1160 return NETDEV_TX_OK;
1161 }
1162
1163 /* taken from the depca driver */
lance_load_multicast(struct net_device * dev)1164 static void lance_load_multicast(struct net_device *dev)
1165 {
1166 struct lance_private *lp = netdev_priv(dev);
1167 struct netdev_hw_addr *ha;
1168 u32 crc;
1169 u32 val;
1170
1171 /* set all multicast bits */
1172 if (dev->flags & IFF_ALLMULTI)
1173 val = ~0;
1174 else
1175 val = 0;
1176
1177 if (lp->pio_buffer) {
1178 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1179 sbus_writel(val, &ib->filter[0]);
1180 sbus_writel(val, &ib->filter[1]);
1181 } else {
1182 struct lance_init_block *ib = lp->init_block_mem;
1183 ib->filter [0] = val;
1184 ib->filter [1] = val;
1185 }
1186
1187 if (dev->flags & IFF_ALLMULTI)
1188 return;
1189
1190 /* Add addresses */
1191 netdev_for_each_mc_addr(ha, dev) {
1192 crc = ether_crc_le(6, ha->addr);
1193 crc = crc >> 26;
1194 if (lp->pio_buffer) {
1195 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1196 u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1197 u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1198 tmp |= 1 << (crc & 0xf);
1199 sbus_writew(tmp, &mcast_table[crc>>4]);
1200 } else {
1201 struct lance_init_block *ib = lp->init_block_mem;
1202 u16 *mcast_table = (u16 *) &ib->filter;
1203 mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1204 }
1205 }
1206 }
1207
lance_set_multicast(struct net_device * dev)1208 static void lance_set_multicast(struct net_device *dev)
1209 {
1210 struct lance_private *lp = netdev_priv(dev);
1211 struct lance_init_block *ib_mem = lp->init_block_mem;
1212 struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1213 u16 mode;
1214
1215 if (!netif_running(dev))
1216 return;
1217
1218 if (lp->tx_old != lp->tx_new) {
1219 mod_timer(&lp->multicast_timer, jiffies + 4);
1220 netif_wake_queue(dev);
1221 return;
1222 }
1223
1224 netif_stop_queue(dev);
1225
1226 STOP_LANCE(lp);
1227 lp->init_ring(dev);
1228
1229 if (lp->pio_buffer)
1230 mode = sbus_readw(&ib_iomem->mode);
1231 else
1232 mode = ib_mem->mode;
1233 if (dev->flags & IFF_PROMISC) {
1234 mode |= LE_MO_PROM;
1235 if (lp->pio_buffer)
1236 sbus_writew(mode, &ib_iomem->mode);
1237 else
1238 ib_mem->mode = mode;
1239 } else {
1240 mode &= ~LE_MO_PROM;
1241 if (lp->pio_buffer)
1242 sbus_writew(mode, &ib_iomem->mode);
1243 else
1244 ib_mem->mode = mode;
1245 lance_load_multicast(dev);
1246 }
1247 load_csrs(lp);
1248 init_restart_lance(lp);
1249 netif_wake_queue(dev);
1250 }
1251
lance_set_multicast_retry(struct timer_list * t)1252 static void lance_set_multicast_retry(struct timer_list *t)
1253 {
1254 struct lance_private *lp = from_timer(lp, t, multicast_timer);
1255 struct net_device *dev = lp->dev;
1256
1257 lance_set_multicast(dev);
1258 }
1259
lance_free_hwresources(struct lance_private * lp)1260 static void lance_free_hwresources(struct lance_private *lp)
1261 {
1262 if (lp->lregs)
1263 of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
1264 if (lp->dregs) {
1265 struct platform_device *ledma = lp->ledma;
1266
1267 of_iounmap(&ledma->resource[0], lp->dregs,
1268 resource_size(&ledma->resource[0]));
1269 }
1270 if (lp->init_block_iomem) {
1271 of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
1272 sizeof(struct lance_init_block));
1273 } else if (lp->init_block_mem) {
1274 dma_free_coherent(&lp->op->dev,
1275 sizeof(struct lance_init_block),
1276 lp->init_block_mem,
1277 lp->init_block_dvma);
1278 }
1279 }
1280
1281 /* Ethtool support... */
sparc_lance_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)1282 static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1283 {
1284 strlcpy(info->driver, "sunlance", sizeof(info->driver));
1285 strlcpy(info->version, "2.02", sizeof(info->version));
1286 }
1287
1288 static const struct ethtool_ops sparc_lance_ethtool_ops = {
1289 .get_drvinfo = sparc_lance_get_drvinfo,
1290 .get_link = ethtool_op_get_link,
1291 };
1292
1293 static const struct net_device_ops sparc_lance_ops = {
1294 .ndo_open = lance_open,
1295 .ndo_stop = lance_close,
1296 .ndo_start_xmit = lance_start_xmit,
1297 .ndo_set_rx_mode = lance_set_multicast,
1298 .ndo_tx_timeout = lance_tx_timeout,
1299 .ndo_set_mac_address = eth_mac_addr,
1300 .ndo_validate_addr = eth_validate_addr,
1301 };
1302
sparc_lance_probe_one(struct platform_device * op,struct platform_device * ledma,struct platform_device * lebuffer)1303 static int sparc_lance_probe_one(struct platform_device *op,
1304 struct platform_device *ledma,
1305 struct platform_device *lebuffer)
1306 {
1307 struct device_node *dp = op->dev.of_node;
1308 static unsigned version_printed;
1309 struct lance_private *lp;
1310 struct net_device *dev;
1311 int i;
1312
1313 dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1314 if (!dev)
1315 return -ENOMEM;
1316
1317 lp = netdev_priv(dev);
1318
1319 if (sparc_lance_debug && version_printed++ == 0)
1320 printk (KERN_INFO "%s", version);
1321
1322 spin_lock_init(&lp->lock);
1323
1324 /* Copy the IDPROM ethernet address to the device structure, later we
1325 * will copy the address in the device structure to the lance
1326 * initialization block.
1327 */
1328 for (i = 0; i < 6; i++)
1329 dev->dev_addr[i] = idprom->id_ethaddr[i];
1330
1331 /* Get the IO region */
1332 lp->lregs = of_ioremap(&op->resource[0], 0,
1333 LANCE_REG_SIZE, lancestr);
1334 if (!lp->lregs) {
1335 printk(KERN_ERR "SunLance: Cannot map registers.\n");
1336 goto fail;
1337 }
1338
1339 lp->ledma = ledma;
1340 if (lp->ledma) {
1341 lp->dregs = of_ioremap(&ledma->resource[0], 0,
1342 resource_size(&ledma->resource[0]),
1343 "ledma");
1344 if (!lp->dregs) {
1345 printk(KERN_ERR "SunLance: Cannot map "
1346 "ledma registers.\n");
1347 goto fail;
1348 }
1349 }
1350
1351 lp->op = op;
1352 lp->lebuffer = lebuffer;
1353 if (lebuffer) {
1354 /* sanity check */
1355 if (lebuffer->resource[0].start & 7) {
1356 printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1357 goto fail;
1358 }
1359 lp->init_block_iomem =
1360 of_ioremap(&lebuffer->resource[0], 0,
1361 sizeof(struct lance_init_block), "lebuffer");
1362 if (!lp->init_block_iomem) {
1363 printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1364 goto fail;
1365 }
1366 lp->init_block_dvma = 0;
1367 lp->pio_buffer = 1;
1368 lp->init_ring = lance_init_ring_pio;
1369 lp->rx = lance_rx_pio;
1370 lp->tx = lance_tx_pio;
1371 } else {
1372 lp->init_block_mem =
1373 dma_alloc_coherent(&op->dev,
1374 sizeof(struct lance_init_block),
1375 &lp->init_block_dvma, GFP_ATOMIC);
1376 if (!lp->init_block_mem)
1377 goto fail;
1378
1379 lp->pio_buffer = 0;
1380 lp->init_ring = lance_init_ring_dvma;
1381 lp->rx = lance_rx_dvma;
1382 lp->tx = lance_tx_dvma;
1383 }
1384 lp->busmaster_regval = of_getintprop_default(dp, "busmaster-regval",
1385 (LE_C3_BSWP |
1386 LE_C3_ACON |
1387 LE_C3_BCON));
1388
1389 lp->name = lancestr;
1390
1391 lp->burst_sizes = 0;
1392 if (lp->ledma) {
1393 struct device_node *ledma_dp = ledma->dev.of_node;
1394 struct device_node *sbus_dp;
1395 unsigned int sbmask;
1396 const char *prop;
1397 u32 csr;
1398
1399 /* Find burst-size property for ledma */
1400 lp->burst_sizes = of_getintprop_default(ledma_dp,
1401 "burst-sizes", 0);
1402
1403 /* ledma may be capable of fast bursts, but sbus may not. */
1404 sbus_dp = ledma_dp->parent;
1405 sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
1406 DMA_BURSTBITS);
1407 lp->burst_sizes &= sbmask;
1408
1409 /* Get the cable-selection property */
1410 prop = of_get_property(ledma_dp, "cable-selection", NULL);
1411 if (!prop || prop[0] == '\0') {
1412 struct device_node *nd;
1413
1414 printk(KERN_INFO "SunLance: using "
1415 "auto-carrier-detection.\n");
1416
1417 nd = of_find_node_by_path("/options");
1418 if (!nd)
1419 goto no_link_test;
1420
1421 prop = of_get_property(nd, "tpe-link-test?", NULL);
1422 if (!prop)
1423 goto node_put;
1424
1425 if (strcmp(prop, "true")) {
1426 printk(KERN_NOTICE "SunLance: warning: overriding option "
1427 "'tpe-link-test?'\n");
1428 printk(KERN_NOTICE "SunLance: warning: mail any problems "
1429 "to ecd@skynet.be\n");
1430 auxio_set_lte(AUXIO_LTE_ON);
1431 }
1432 node_put:
1433 of_node_put(nd);
1434 no_link_test:
1435 lp->auto_select = 1;
1436 lp->tpe = 0;
1437 } else if (!strcmp(prop, "aui")) {
1438 lp->auto_select = 0;
1439 lp->tpe = 0;
1440 } else {
1441 lp->auto_select = 0;
1442 lp->tpe = 1;
1443 }
1444
1445 /* Reset ledma */
1446 csr = sbus_readl(lp->dregs + DMA_CSR);
1447 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1448 udelay(200);
1449 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1450 } else
1451 lp->dregs = NULL;
1452
1453 lp->dev = dev;
1454 SET_NETDEV_DEV(dev, &op->dev);
1455 dev->watchdog_timeo = 5*HZ;
1456 dev->ethtool_ops = &sparc_lance_ethtool_ops;
1457 dev->netdev_ops = &sparc_lance_ops;
1458
1459 dev->irq = op->archdata.irqs[0];
1460
1461 /* We cannot sleep if the chip is busy during a
1462 * multicast list update event, because such events
1463 * can occur from interrupts (ex. IPv6). So we
1464 * use a timer to try again later when necessary. -DaveM
1465 */
1466 timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
1467
1468 if (register_netdev(dev)) {
1469 printk(KERN_ERR "SunLance: Cannot register device.\n");
1470 goto fail;
1471 }
1472
1473 platform_set_drvdata(op, lp);
1474
1475 printk(KERN_INFO "%s: LANCE %pM\n",
1476 dev->name, dev->dev_addr);
1477
1478 return 0;
1479
1480 fail:
1481 lance_free_hwresources(lp);
1482 free_netdev(dev);
1483 return -ENODEV;
1484 }
1485
sunlance_sbus_probe(struct platform_device * op)1486 static int sunlance_sbus_probe(struct platform_device *op)
1487 {
1488 struct platform_device *parent = to_platform_device(op->dev.parent);
1489 struct device_node *parent_dp = parent->dev.of_node;
1490 int err;
1491
1492 if (of_node_name_eq(parent_dp, "ledma")) {
1493 err = sparc_lance_probe_one(op, parent, NULL);
1494 } else if (of_node_name_eq(parent_dp, "lebuffer")) {
1495 err = sparc_lance_probe_one(op, NULL, parent);
1496 } else
1497 err = sparc_lance_probe_one(op, NULL, NULL);
1498
1499 return err;
1500 }
1501
sunlance_sbus_remove(struct platform_device * op)1502 static int sunlance_sbus_remove(struct platform_device *op)
1503 {
1504 struct lance_private *lp = platform_get_drvdata(op);
1505 struct net_device *net_dev = lp->dev;
1506
1507 unregister_netdev(net_dev);
1508
1509 lance_free_hwresources(lp);
1510
1511 free_netdev(net_dev);
1512
1513 return 0;
1514 }
1515
1516 static const struct of_device_id sunlance_sbus_match[] = {
1517 {
1518 .name = "le",
1519 },
1520 {},
1521 };
1522
1523 MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1524
1525 static struct platform_driver sunlance_sbus_driver = {
1526 .driver = {
1527 .name = "sunlance",
1528 .of_match_table = sunlance_sbus_match,
1529 },
1530 .probe = sunlance_sbus_probe,
1531 .remove = sunlance_sbus_remove,
1532 };
1533
1534 module_platform_driver(sunlance_sbus_driver);
1535
