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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / net / ethernet / amd / sunlance.c
bloba21b2e60157e56c3ce0aed17c2c254f8b00af729
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_RELDATE "8/24/03"
109 #define DRV_AUTHOR "Miguel de Icaza (miguel@nuclecu.unam.mx)"
110
111 MODULE_AUTHOR(DRV_AUTHOR);
112 MODULE_DESCRIPTION("Sun Lance ethernet driver");
113 MODULE_LICENSE("GPL");
114
115 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
116 #ifndef LANCE_LOG_TX_BUFFERS
117 #define LANCE_LOG_TX_BUFFERS 4
118 #define LANCE_LOG_RX_BUFFERS 4
119 #endif
120
121 #define LE_CSR0 0
122 #define LE_CSR1 1
123 #define LE_CSR2 2
124 #define LE_CSR3 3
125
126 #define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
127
128 #define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
129 #define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
130 #define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
131 #define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
132 #define LE_C0_MERR 0x0800 /* ME: Memory error */
133 #define LE_C0_RINT 0x0400 /* Received interrupt */
134 #define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
135 #define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
136 #define LE_C0_INTR 0x0080 /* Interrupt or error */
137 #define LE_C0_INEA 0x0040 /* Interrupt enable */
138 #define LE_C0_RXON 0x0020 /* Receiver on */
139 #define LE_C0_TXON 0x0010 /* Transmitter on */
140 #define LE_C0_TDMD 0x0008 /* Transmitter demand */
141 #define LE_C0_STOP 0x0004 /* Stop the card */
142 #define LE_C0_STRT 0x0002 /* Start the card */
143 #define LE_C0_INIT 0x0001 /* Init the card */
144
145 #define LE_C3_BSWP 0x4 /* SWAP */
146 #define LE_C3_ACON 0x2 /* ALE Control */
147 #define LE_C3_BCON 0x1 /* Byte control */
148
149 /* Receive message descriptor 1 */
150 #define LE_R1_OWN 0x80 /* Who owns the entry */
151 #define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */
152 #define LE_R1_FRA 0x20 /* FRA: Frame error */
153 #define LE_R1_OFL 0x10 /* OFL: Frame overflow */
154 #define LE_R1_CRC 0x08 /* CRC error */
155 #define LE_R1_BUF 0x04 /* BUF: Buffer error */
156 #define LE_R1_SOP 0x02 /* Start of packet */
157 #define LE_R1_EOP 0x01 /* End of packet */
158 #define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */
159
160 #define LE_T1_OWN 0x80 /* Lance owns the packet */
161 #define LE_T1_ERR 0x40 /* Error summary */
162 #define LE_T1_EMORE 0x10 /* Error: more than one retry needed */
163 #define LE_T1_EONE 0x08 /* Error: one retry needed */
164 #define LE_T1_EDEF 0x04 /* Error: deferred */
165 #define LE_T1_SOP 0x02 /* Start of packet */
166 #define LE_T1_EOP 0x01 /* End of packet */
167 #define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */
168
169 #define LE_T3_BUF 0x8000 /* Buffer error */
170 #define LE_T3_UFL 0x4000 /* Error underflow */
171 #define LE_T3_LCOL 0x1000 /* Error late collision */
172 #define LE_T3_CLOS 0x0800 /* Error carrier loss */
173 #define LE_T3_RTY 0x0400 /* Error retry */
174 #define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
175
176 #define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
177 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
178 #define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
179 #define TX_NEXT(__x) (((__x)+1) & TX_RING_MOD_MASK)
180
181 #define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
182 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
183 #define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
184 #define RX_NEXT(__x) (((__x)+1) & RX_RING_MOD_MASK)
185
186 #define PKT_BUF_SZ 1544
187 #define RX_BUFF_SIZE PKT_BUF_SZ
188 #define TX_BUFF_SIZE PKT_BUF_SZ
189
190 struct lance_rx_desc {
191 u16 rmd0; /* low address of packet */
192 u8 rmd1_bits; /* descriptor bits */
193 u8 rmd1_hadr; /* high address of packet */
194 s16 length; /* This length is 2s complement (negative)!
195 * Buffer length
196 */
197 u16 mblength; /* This is the actual number of bytes received */
198 };
199
200 struct lance_tx_desc {
201 u16 tmd0; /* low address of packet */
202 u8 tmd1_bits; /* descriptor bits */
203 u8 tmd1_hadr; /* high address of packet */
204 s16 length; /* Length is 2s complement (negative)! */
205 u16 misc;
206 };
207
208 /* The LANCE initialization block, described in databook. */
209 /* On the Sparc, this block should be on a DMA region */
210 struct lance_init_block {
211 u16 mode; /* Pre-set mode (reg. 15) */
212 u8 phys_addr[6]; /* Physical ethernet address */
213 u32 filter[2]; /* Multicast filter. */
214
215 /* Receive and transmit ring base, along with extra bits. */
216 u16 rx_ptr; /* receive descriptor addr */
217 u16 rx_len; /* receive len and high addr */
218 u16 tx_ptr; /* transmit descriptor addr */
219 u16 tx_len; /* transmit len and high addr */
220
221 /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
222 struct lance_rx_desc brx_ring[RX_RING_SIZE];
223 struct lance_tx_desc btx_ring[TX_RING_SIZE];
224
225 u8 tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
226 u8 pad[2]; /* align rx_buf for copy_and_sum(). */
227 u8 rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
228 };
229
230 #define libdesc_offset(rt, elem) \
231 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
232
233 #define libbuff_offset(rt, elem) \
234 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
235
236 struct lance_private {
237 void __iomem *lregs; /* Lance RAP/RDP regs. */
238 void __iomem *dregs; /* DMA controller regs. */
239 struct lance_init_block __iomem *init_block_iomem;
240 struct lance_init_block *init_block_mem;
241
242 spinlock_t lock;
243
244 int rx_new, tx_new;
245 int rx_old, tx_old;
246
247 struct platform_device *ledma; /* If set this points to ledma */
248 char tpe; /* cable-selection is TPE */
249 char auto_select; /* cable-selection by carrier */
250 char burst_sizes; /* ledma SBus burst sizes */
251 char pio_buffer; /* init block in PIO space? */
252
253 unsigned short busmaster_regval;
254
255 void (*init_ring)(struct net_device *);
256 void (*rx)(struct net_device *);
257 void (*tx)(struct net_device *);
258
259 char *name;
260 dma_addr_t init_block_dvma;
261 struct net_device *dev; /* Backpointer */
262 struct platform_device *op;
263 struct platform_device *lebuffer;
264 struct timer_list multicast_timer;
265 };
266
267 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
268 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
269 lp->tx_old - lp->tx_new-1)
270
271 /* Lance registers. */
272 #define RDP 0x00UL /* register data port */
273 #define RAP 0x02UL /* register address port */
274 #define LANCE_REG_SIZE 0x04UL
275
276 #define STOP_LANCE(__lp) \
277 do { void __iomem *__base = (__lp)->lregs; \
278 sbus_writew(LE_CSR0, __base + RAP); \
279 sbus_writew(LE_C0_STOP, __base + RDP); \
280 } while (0)
281
282 int sparc_lance_debug = 2;
283
284 /* The Lance uses 24 bit addresses */
285 /* On the Sun4c the DVMA will provide the remaining bytes for us */
286 /* On the Sun4m we have to instruct the ledma to provide them */
287 /* Even worse, on scsi/ether SBUS cards, the init block and the
288 * transmit/receive buffers are addresses as offsets from absolute
289 * zero on the lebuffer PIO area. -DaveM
290 */
291
292 #define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
293
294 /* Load the CSR registers */
295 static void load_csrs(struct lance_private *lp)
296 {
297 u32 leptr;
298
299 if (lp->pio_buffer)
300 leptr = 0;
301 else
302 leptr = LANCE_ADDR(lp->init_block_dvma);
303
304 sbus_writew(LE_CSR1, lp->lregs + RAP);
305 sbus_writew(leptr & 0xffff, lp->lregs + RDP);
306 sbus_writew(LE_CSR2, lp->lregs + RAP);
307 sbus_writew(leptr >> 16, lp->lregs + RDP);
308 sbus_writew(LE_CSR3, lp->lregs + RAP);
309 sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
310
311 /* Point back to csr0 */
312 sbus_writew(LE_CSR0, lp->lregs + RAP);
313 }
314
315 /* Setup the Lance Rx and Tx rings */
316 static void lance_init_ring_dvma(struct net_device *dev)
317 {
318 struct lance_private *lp = netdev_priv(dev);
319 struct lance_init_block *ib = lp->init_block_mem;
320 dma_addr_t aib = lp->init_block_dvma;
321 __u32 leptr;
322 int i;
323
324 /* Lock out other processes while setting up hardware */
325 netif_stop_queue(dev);
326 lp->rx_new = lp->tx_new = 0;
327 lp->rx_old = lp->tx_old = 0;
328
329 /* Copy the ethernet address to the lance init block
330 * Note that on the sparc you need to swap the ethernet address.
331 */
332 ib->phys_addr [0] = dev->dev_addr [1];
333 ib->phys_addr [1] = dev->dev_addr [0];
334 ib->phys_addr [2] = dev->dev_addr [3];
335 ib->phys_addr [3] = dev->dev_addr [2];
336 ib->phys_addr [4] = dev->dev_addr [5];
337 ib->phys_addr [5] = dev->dev_addr [4];
338
339 /* Setup the Tx ring entries */
340 for (i = 0; i < TX_RING_SIZE; i++) {
341 leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
342 ib->btx_ring [i].tmd0 = leptr;
343 ib->btx_ring [i].tmd1_hadr = leptr >> 16;
344 ib->btx_ring [i].tmd1_bits = 0;
345 ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */
346 ib->btx_ring [i].misc = 0;
347 }
348
349 /* Setup the Rx ring entries */
350 for (i = 0; i < RX_RING_SIZE; i++) {
351 leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
352
353 ib->brx_ring [i].rmd0 = leptr;
354 ib->brx_ring [i].rmd1_hadr = leptr >> 16;
355 ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
356 ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000;
357 ib->brx_ring [i].mblength = 0;
358 }
359
360 /* Setup the initialization block */
361
362 /* Setup rx descriptor pointer */
363 leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
364 ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
365 ib->rx_ptr = leptr;
366
367 /* Setup tx descriptor pointer */
368 leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
369 ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
370 ib->tx_ptr = leptr;
371 }
372
373 static void lance_init_ring_pio(struct net_device *dev)
374 {
375 struct lance_private *lp = netdev_priv(dev);
376 struct lance_init_block __iomem *ib = lp->init_block_iomem;
377 u32 leptr;
378 int i;
379
380 /* Lock out other processes while setting up hardware */
381 netif_stop_queue(dev);
382 lp->rx_new = lp->tx_new = 0;
383 lp->rx_old = lp->tx_old = 0;
384
385 /* Copy the ethernet address to the lance init block
386 * Note that on the sparc you need to swap the ethernet address.
387 */
388 sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
389 sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
390 sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
391 sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
392 sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
393 sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
394
395 /* Setup the Tx ring entries */
396 for (i = 0; i < TX_RING_SIZE; i++) {
397 leptr = libbuff_offset(tx_buf, i);
398 sbus_writew(leptr, &ib->btx_ring [i].tmd0);
399 sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
400 sbus_writeb(0, &ib->btx_ring [i].tmd1_bits);
401
402 /* The ones required by tmd2 */
403 sbus_writew(0xf000, &ib->btx_ring [i].length);
404 sbus_writew(0, &ib->btx_ring [i].misc);
405 }
406
407 /* Setup the Rx ring entries */
408 for (i = 0; i < RX_RING_SIZE; i++) {
409 leptr = libbuff_offset(rx_buf, i);
410
411 sbus_writew(leptr, &ib->brx_ring [i].rmd0);
412 sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
413 sbus_writeb(LE_R1_OWN, &ib->brx_ring [i].rmd1_bits);
414 sbus_writew(-RX_BUFF_SIZE|0xf000,
415 &ib->brx_ring [i].length);
416 sbus_writew(0, &ib->brx_ring [i].mblength);
417 }
418
419 /* Setup the initialization block */
420
421 /* Setup rx descriptor pointer */
422 leptr = libdesc_offset(brx_ring, 0);
423 sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
424 &ib->rx_len);
425 sbus_writew(leptr, &ib->rx_ptr);
426
427 /* Setup tx descriptor pointer */
428 leptr = libdesc_offset(btx_ring, 0);
429 sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
430 &ib->tx_len);
431 sbus_writew(leptr, &ib->tx_ptr);
432 }
433
434 static void init_restart_ledma(struct lance_private *lp)
435 {
436 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
437
438 if (!(csr & DMA_HNDL_ERROR)) {
439 /* E-Cache draining */
440 while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
441 barrier();
442 }
443
444 csr = sbus_readl(lp->dregs + DMA_CSR);
445 csr &= ~DMA_E_BURSTS;
446 if (lp->burst_sizes & DMA_BURST32)
447 csr |= DMA_E_BURST32;
448 else
449 csr |= DMA_E_BURST16;
450
451 csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
452
453 if (lp->tpe)
454 csr |= DMA_EN_ENETAUI;
455 else
456 csr &= ~DMA_EN_ENETAUI;
457 udelay(20);
458 sbus_writel(csr, lp->dregs + DMA_CSR);
459 udelay(200);
460 }
461
462 static int init_restart_lance(struct lance_private *lp)
463 {
464 u16 regval = 0;
465 int i;
466
467 if (lp->dregs)
468 init_restart_ledma(lp);
469
470 sbus_writew(LE_CSR0, lp->lregs + RAP);
471 sbus_writew(LE_C0_INIT, lp->lregs + RDP);
472
473 /* Wait for the lance to complete initialization */
474 for (i = 0; i < 100; i++) {
475 regval = sbus_readw(lp->lregs + RDP);
476
477 if (regval & (LE_C0_ERR | LE_C0_IDON))
478 break;
479 barrier();
480 }
481 if (i == 100 || (regval & LE_C0_ERR)) {
482 printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
483 i, regval);
484 if (lp->dregs)
485 printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
486 return -1;
487 }
488
489 /* Clear IDON by writing a "1", enable interrupts and start lance */
490 sbus_writew(LE_C0_IDON, lp->lregs + RDP);
491 sbus_writew(LE_C0_INEA | LE_C0_STRT, lp->lregs + RDP);
492
493 if (lp->dregs) {
494 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
495
496 csr |= DMA_INT_ENAB;
497 sbus_writel(csr, lp->dregs + DMA_CSR);
498 }
499
500 return 0;
501 }
502
503 static void lance_rx_dvma(struct net_device *dev)
504 {
505 struct lance_private *lp = netdev_priv(dev);
506 struct lance_init_block *ib = lp->init_block_mem;
507 struct lance_rx_desc *rd;
508 u8 bits;
509 int len, entry = lp->rx_new;
510 struct sk_buff *skb;
511
512 for (rd = &ib->brx_ring [entry];
513 !((bits = rd->rmd1_bits) & LE_R1_OWN);
514 rd = &ib->brx_ring [entry]) {
515
516 /* We got an incomplete frame? */
517 if ((bits & LE_R1_POK) != LE_R1_POK) {
518 dev->stats.rx_over_errors++;
519 dev->stats.rx_errors++;
520 } else if (bits & LE_R1_ERR) {
521 /* Count only the end frame as a rx error,
522 * not the beginning
523 */
524 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
525 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
526 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
527 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
528 if (bits & LE_R1_EOP) dev->stats.rx_errors++;
529 } else {
530 len = (rd->mblength & 0xfff) - 4;
531 skb = netdev_alloc_skb(dev, len + 2);
532
533 if (skb == NULL) {
534 dev->stats.rx_dropped++;
535 rd->mblength = 0;
536 rd->rmd1_bits = LE_R1_OWN;
537 lp->rx_new = RX_NEXT(entry);
538 return;
539 }
540
541 dev->stats.rx_bytes += len;
542
543 skb_reserve(skb, 2); /* 16 byte align */
544 skb_put(skb, len); /* make room */
545 skb_copy_to_linear_data(skb,
546 (unsigned char *)&(ib->rx_buf [entry][0]),
547 len);
548 skb->protocol = eth_type_trans(skb, dev);
549 netif_rx(skb);
550 dev->stats.rx_packets++;
551 }
552
553 /* Return the packet to the pool */
554 rd->mblength = 0;
555 rd->rmd1_bits = LE_R1_OWN;
556 entry = RX_NEXT(entry);
557 }
558
559 lp->rx_new = entry;
560 }
561
562 static void lance_tx_dvma(struct net_device *dev)
563 {
564 struct lance_private *lp = netdev_priv(dev);
565 struct lance_init_block *ib = lp->init_block_mem;
566 int i, j;
567
568 spin_lock(&lp->lock);
569
570 j = lp->tx_old;
571 for (i = j; i != lp->tx_new; i = j) {
572 struct lance_tx_desc *td = &ib->btx_ring [i];
573 u8 bits = td->tmd1_bits;
574
575 /* If we hit a packet not owned by us, stop */
576 if (bits & LE_T1_OWN)
577 break;
578
579 if (bits & LE_T1_ERR) {
580 u16 status = td->misc;
581
582 dev->stats.tx_errors++;
583 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
584 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
585
586 if (status & LE_T3_CLOS) {
587 dev->stats.tx_carrier_errors++;
588 if (lp->auto_select) {
589 lp->tpe = 1 - lp->tpe;
590 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
591 dev->name, lp->tpe?"TPE":"AUI");
592 STOP_LANCE(lp);
593 lp->init_ring(dev);
594 load_csrs(lp);
595 init_restart_lance(lp);
596 goto out;
597 }
598 }
599
600 /* Buffer errors and underflows turn off the
601 * transmitter, restart the adapter.
602 */
603 if (status & (LE_T3_BUF|LE_T3_UFL)) {
604 dev->stats.tx_fifo_errors++;
605
606 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
607 dev->name);
608 STOP_LANCE(lp);
609 lp->init_ring(dev);
610 load_csrs(lp);
611 init_restart_lance(lp);
612 goto out;
613 }
614 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
615 /*
616 * So we don't count the packet more than once.
617 */
618 td->tmd1_bits = bits & ~(LE_T1_POK);
619
620 /* One collision before packet was sent. */
621 if (bits & LE_T1_EONE)
622 dev->stats.collisions++;
623
624 /* More than one collision, be optimistic. */
625 if (bits & LE_T1_EMORE)
626 dev->stats.collisions += 2;
627
628 dev->stats.tx_packets++;
629 }
630
631 j = TX_NEXT(j);
632 }
633 lp->tx_old = j;
634 out:
635 if (netif_queue_stopped(dev) &&
636 TX_BUFFS_AVAIL > 0)
637 netif_wake_queue(dev);
638
639 spin_unlock(&lp->lock);
640 }
641
642 static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
643 {
644 u16 *p16 = (u16 *) skb->data;
645 u32 *p32;
646 u8 *p8;
647 void __iomem *pbuf = piobuf;
648
649 /* We know here that both src and dest are on a 16bit boundary. */
650 *p16++ = sbus_readw(pbuf);
651 p32 = (u32 *) p16;
652 pbuf += 2;
653 len -= 2;
654
655 while (len >= 4) {
656 *p32++ = sbus_readl(pbuf);
657 pbuf += 4;
658 len -= 4;
659 }
660 p8 = (u8 *) p32;
661 if (len >= 2) {
662 p16 = (u16 *) p32;
663 *p16++ = sbus_readw(pbuf);
664 pbuf += 2;
665 len -= 2;
666 p8 = (u8 *) p16;
667 }
668 if (len >= 1)
669 *p8 = sbus_readb(pbuf);
670 }
671
672 static void lance_rx_pio(struct net_device *dev)
673 {
674 struct lance_private *lp = netdev_priv(dev);
675 struct lance_init_block __iomem *ib = lp->init_block_iomem;
676 struct lance_rx_desc __iomem *rd;
677 unsigned char bits;
678 int len, entry;
679 struct sk_buff *skb;
680
681 entry = lp->rx_new;
682 for (rd = &ib->brx_ring [entry];
683 !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
684 rd = &ib->brx_ring [entry]) {
685
686 /* We got an incomplete frame? */
687 if ((bits & LE_R1_POK) != LE_R1_POK) {
688 dev->stats.rx_over_errors++;
689 dev->stats.rx_errors++;
690 } else if (bits & LE_R1_ERR) {
691 /* Count only the end frame as a rx error,
692 * not the beginning
693 */
694 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
695 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
696 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
697 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
698 if (bits & LE_R1_EOP) dev->stats.rx_errors++;
699 } else {
700 len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
701 skb = netdev_alloc_skb(dev, len + 2);
702
703 if (skb == NULL) {
704 dev->stats.rx_dropped++;
705 sbus_writew(0, &rd->mblength);
706 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
707 lp->rx_new = RX_NEXT(entry);
708 return;
709 }
710
711 dev->stats.rx_bytes += len;
712
713 skb_reserve (skb, 2); /* 16 byte align */
714 skb_put(skb, len); /* make room */
715 lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
716 skb->protocol = eth_type_trans(skb, dev);
717 netif_rx(skb);
718 dev->stats.rx_packets++;
719 }
720
721 /* Return the packet to the pool */
722 sbus_writew(0, &rd->mblength);
723 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
724 entry = RX_NEXT(entry);
725 }
726
727 lp->rx_new = entry;
728 }
729
730 static void lance_tx_pio(struct net_device *dev)
731 {
732 struct lance_private *lp = netdev_priv(dev);
733 struct lance_init_block __iomem *ib = lp->init_block_iomem;
734 int i, j;
735
736 spin_lock(&lp->lock);
737
738 j = lp->tx_old;
739 for (i = j; i != lp->tx_new; i = j) {
740 struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
741 u8 bits = sbus_readb(&td->tmd1_bits);
742
743 /* If we hit a packet not owned by us, stop */
744 if (bits & LE_T1_OWN)
745 break;
746
747 if (bits & LE_T1_ERR) {
748 u16 status = sbus_readw(&td->misc);
749
750 dev->stats.tx_errors++;
751 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
752 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
753
754 if (status & LE_T3_CLOS) {
755 dev->stats.tx_carrier_errors++;
756 if (lp->auto_select) {
757 lp->tpe = 1 - lp->tpe;
758 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
759 dev->name, lp->tpe?"TPE":"AUI");
760 STOP_LANCE(lp);
761 lp->init_ring(dev);
762 load_csrs(lp);
763 init_restart_lance(lp);
764 goto out;
765 }
766 }
767
768 /* Buffer errors and underflows turn off the
769 * transmitter, restart the adapter.
770 */
771 if (status & (LE_T3_BUF|LE_T3_UFL)) {
772 dev->stats.tx_fifo_errors++;
773
774 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
775 dev->name);
776 STOP_LANCE(lp);
777 lp->init_ring(dev);
778 load_csrs(lp);
779 init_restart_lance(lp);
780 goto out;
781 }
782 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
783 /*
784 * So we don't count the packet more than once.
785 */
786 sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
787
788 /* One collision before packet was sent. */
789 if (bits & LE_T1_EONE)
790 dev->stats.collisions++;
791
792 /* More than one collision, be optimistic. */
793 if (bits & LE_T1_EMORE)
794 dev->stats.collisions += 2;
795
796 dev->stats.tx_packets++;
797 }
798
799 j = TX_NEXT(j);
800 }
801 lp->tx_old = j;
802
803 if (netif_queue_stopped(dev) &&
804 TX_BUFFS_AVAIL > 0)
805 netif_wake_queue(dev);
806 out:
807 spin_unlock(&lp->lock);
808 }
809
810 static irqreturn_t lance_interrupt(int irq, void *dev_id)
811 {
812 struct net_device *dev = dev_id;
813 struct lance_private *lp = netdev_priv(dev);
814 int csr0;
815
816 sbus_writew(LE_CSR0, lp->lregs + RAP);
817 csr0 = sbus_readw(lp->lregs + RDP);
818
819 /* Acknowledge all the interrupt sources ASAP */
820 sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
821 lp->lregs + RDP);
822
823 if ((csr0 & LE_C0_ERR) != 0) {
824 /* Clear the error condition */
825 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
826 LE_C0_CERR | LE_C0_MERR),
827 lp->lregs + RDP);
828 }
829
830 if (csr0 & LE_C0_RINT)
831 lp->rx(dev);
832
833 if (csr0 & LE_C0_TINT)
834 lp->tx(dev);
835
836 if (csr0 & LE_C0_BABL)
837 dev->stats.tx_errors++;
838
839 if (csr0 & LE_C0_MISS)
840 dev->stats.rx_errors++;
841
842 if (csr0 & LE_C0_MERR) {
843 if (lp->dregs) {
844 u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
845
846 printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
847 dev->name, csr0, addr & 0xffffff);
848 } else {
849 printk(KERN_ERR "%s: Memory error, status %04x\n",
850 dev->name, csr0);
851 }
852
853 sbus_writew(LE_C0_STOP, lp->lregs + RDP);
854
855 if (lp->dregs) {
856 u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
857
858 dma_csr |= DMA_FIFO_INV;
859 sbus_writel(dma_csr, lp->dregs + DMA_CSR);
860 }
861
862 lp->init_ring(dev);
863 load_csrs(lp);
864 init_restart_lance(lp);
865 netif_wake_queue(dev);
866 }
867
868 sbus_writew(LE_C0_INEA, lp->lregs + RDP);
869
870 return IRQ_HANDLED;
871 }
872
873 /* Build a fake network packet and send it to ourselves. */
874 static void build_fake_packet(struct lance_private *lp)
875 {
876 struct net_device *dev = lp->dev;
877 int i, entry;
878
879 entry = lp->tx_new & TX_RING_MOD_MASK;
880 if (lp->pio_buffer) {
881 struct lance_init_block __iomem *ib = lp->init_block_iomem;
882 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
883 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
884 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
885 sbus_writew(0, &packet[i]);
886 for (i = 0; i < 6; i++) {
887 sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
888 sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
889 }
890 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
891 sbus_writew(0, &ib->btx_ring[entry].misc);
892 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
893 } else {
894 struct lance_init_block *ib = lp->init_block_mem;
895 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
896 struct ethhdr *eth = (struct ethhdr *) packet;
897 memset(packet, 0, ETH_ZLEN);
898 for (i = 0; i < 6; i++) {
899 eth->h_dest[i] = dev->dev_addr[i];
900 eth->h_source[i] = dev->dev_addr[i];
901 }
902 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
903 ib->btx_ring[entry].misc = 0;
904 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
905 }
906 lp->tx_new = TX_NEXT(entry);
907 }
908
909 static int lance_open(struct net_device *dev)
910 {
911 struct lance_private *lp = netdev_priv(dev);
912 int status = 0;
913
914 STOP_LANCE(lp);
915
916 if (request_irq(dev->irq, lance_interrupt, IRQF_SHARED,
917 lancestr, (void *) dev)) {
918 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
919 return -EAGAIN;
920 }
921
922 /* On the 4m, setup the ledma to provide the upper bits for buffers */
923 if (lp->dregs) {
924 u32 regval = lp->init_block_dvma & 0xff000000;
925
926 sbus_writel(regval, lp->dregs + DMA_TEST);
927 }
928
929 /* Set mode and clear multicast filter only at device open,
930 * so that lance_init_ring() called at any error will not
931 * forget multicast filters.
932 *
933 * BTW it is common bug in all lance drivers! --ANK
934 */
935 if (lp->pio_buffer) {
936 struct lance_init_block __iomem *ib = lp->init_block_iomem;
937 sbus_writew(0, &ib->mode);
938 sbus_writel(0, &ib->filter[0]);
939 sbus_writel(0, &ib->filter[1]);
940 } else {
941 struct lance_init_block *ib = lp->init_block_mem;
942 ib->mode = 0;
943 ib->filter [0] = 0;
944 ib->filter [1] = 0;
945 }
946
947 lp->init_ring(dev);
948 load_csrs(lp);
949
950 netif_start_queue(dev);
951
952 status = init_restart_lance(lp);
953 if (!status && lp->auto_select) {
954 build_fake_packet(lp);
955 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
956 }
957
958 return status;
959 }
960
961 static int lance_close(struct net_device *dev)
962 {
963 struct lance_private *lp = netdev_priv(dev);
964
965 netif_stop_queue(dev);
966 del_timer_sync(&lp->multicast_timer);
967
968 STOP_LANCE(lp);
969
970 free_irq(dev->irq, (void *) dev);
971 return 0;
972 }
973
974 static int lance_reset(struct net_device *dev)
975 {
976 struct lance_private *lp = netdev_priv(dev);
977 int status;
978
979 STOP_LANCE(lp);
980
981 /* On the 4m, reset the dma too */
982 if (lp->dregs) {
983 u32 csr, addr;
984
985 printk(KERN_ERR "resetting ledma\n");
986 csr = sbus_readl(lp->dregs + DMA_CSR);
987 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
988 udelay(200);
989 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
990
991 addr = lp->init_block_dvma & 0xff000000;
992 sbus_writel(addr, lp->dregs + DMA_TEST);
993 }
994 lp->init_ring(dev);
995 load_csrs(lp);
996 netif_trans_update(dev); /* prevent tx timeout */
997 status = init_restart_lance(lp);
998 return status;
999 }
1000
1001 static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1002 {
1003 void __iomem *piobuf = dest;
1004 u32 *p32;
1005 u16 *p16;
1006 u8 *p8;
1007
1008 switch ((unsigned long)src & 0x3) {
1009 case 0:
1010 p32 = (u32 *) src;
1011 while (len >= 4) {
1012 sbus_writel(*p32, piobuf);
1013 p32++;
1014 piobuf += 4;
1015 len -= 4;
1016 }
1017 src = (char *) p32;
1018 break;
1019 case 1:
1020 case 3:
1021 p8 = (u8 *) src;
1022 while (len >= 4) {
1023 u32 val;
1024
1025 val = p8[0] << 24;
1026 val |= p8[1] << 16;
1027 val |= p8[2] << 8;
1028 val |= p8[3];
1029 sbus_writel(val, piobuf);
1030 p8 += 4;
1031 piobuf += 4;
1032 len -= 4;
1033 }
1034 src = (char *) p8;
1035 break;
1036 case 2:
1037 p16 = (u16 *) src;
1038 while (len >= 4) {
1039 u32 val = p16[0]<<16 | p16[1];
1040 sbus_writel(val, piobuf);
1041 p16 += 2;
1042 piobuf += 4;
1043 len -= 4;
1044 }
1045 src = (char *) p16;
1046 break;
1047 }
1048 if (len >= 2) {
1049 u16 val = src[0] << 8 | src[1];
1050 sbus_writew(val, piobuf);
1051 src += 2;
1052 piobuf += 2;
1053 len -= 2;
1054 }
1055 if (len >= 1)
1056 sbus_writeb(src[0], piobuf);
1057 }
1058
1059 static void lance_piozero(void __iomem *dest, int len)
1060 {
1061 void __iomem *piobuf = dest;
1062
1063 if ((unsigned long)piobuf & 1) {
1064 sbus_writeb(0, piobuf);
1065 piobuf += 1;
1066 len -= 1;
1067 if (len == 0)
1068 return;
1069 }
1070 if (len == 1) {
1071 sbus_writeb(0, piobuf);
1072 return;
1073 }
1074 if ((unsigned long)piobuf & 2) {
1075 sbus_writew(0, piobuf);
1076 piobuf += 2;
1077 len -= 2;
1078 if (len == 0)
1079 return;
1080 }
1081 while (len >= 4) {
1082 sbus_writel(0, piobuf);
1083 piobuf += 4;
1084 len -= 4;
1085 }
1086 if (len >= 2) {
1087 sbus_writew(0, piobuf);
1088 piobuf += 2;
1089 len -= 2;
1090 }
1091 if (len >= 1)
1092 sbus_writeb(0, piobuf);
1093 }
1094
1095 static void lance_tx_timeout(struct net_device *dev, unsigned int txqueue)
1096 {
1097 struct lance_private *lp = netdev_priv(dev);
1098
1099 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1100 dev->name, sbus_readw(lp->lregs + RDP));
1101 lance_reset(dev);
1102 netif_wake_queue(dev);
1103 }
1104
1105 static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1106 {
1107 struct lance_private *lp = netdev_priv(dev);
1108 int entry, skblen, len;
1109
1110 skblen = skb->len;
1111
1112 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1113
1114 spin_lock_irq(&lp->lock);
1115
1116 dev->stats.tx_bytes += len;
1117
1118 entry = lp->tx_new & TX_RING_MOD_MASK;
1119 if (lp->pio_buffer) {
1120 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1121 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1122 sbus_writew(0, &ib->btx_ring[entry].misc);
1123 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1124 if (len != skblen)
1125 lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1126 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1127 } else {
1128 struct lance_init_block *ib = lp->init_block_mem;
1129 ib->btx_ring [entry].length = (-len) | 0xf000;
1130 ib->btx_ring [entry].misc = 0;
1131 skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1132 if (len != skblen)
1133 memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1134 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1135 }
1136
1137 lp->tx_new = TX_NEXT(entry);
1138
1139 if (TX_BUFFS_AVAIL <= 0)
1140 netif_stop_queue(dev);
1141
1142 /* Kick the lance: transmit now */
1143 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1144
1145 /* Read back CSR to invalidate the E-Cache.
1146 * This is needed, because DMA_DSBL_WR_INV is set.
1147 */
1148 if (lp->dregs)
1149 sbus_readw(lp->lregs + RDP);
1150
1151 spin_unlock_irq(&lp->lock);
1152
1153 dev_kfree_skb(skb);
1154
1155 return NETDEV_TX_OK;
1156 }
1157
1158 /* taken from the depca driver */
1159 static void lance_load_multicast(struct net_device *dev)
1160 {
1161 struct lance_private *lp = netdev_priv(dev);
1162 struct netdev_hw_addr *ha;
1163 u32 crc;
1164 u32 val;
1165
1166 /* set all multicast bits */
1167 if (dev->flags & IFF_ALLMULTI)
1168 val = ~0;
1169 else
1170 val = 0;
1171
1172 if (lp->pio_buffer) {
1173 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1174 sbus_writel(val, &ib->filter[0]);
1175 sbus_writel(val, &ib->filter[1]);
1176 } else {
1177 struct lance_init_block *ib = lp->init_block_mem;
1178 ib->filter [0] = val;
1179 ib->filter [1] = val;
1180 }
1181
1182 if (dev->flags & IFF_ALLMULTI)
1183 return;
1184
1185 /* Add addresses */
1186 netdev_for_each_mc_addr(ha, dev) {
1187 crc = ether_crc_le(6, ha->addr);
1188 crc = crc >> 26;
1189 if (lp->pio_buffer) {
1190 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1191 u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1192 u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1193 tmp |= 1 << (crc & 0xf);
1194 sbus_writew(tmp, &mcast_table[crc>>4]);
1195 } else {
1196 struct lance_init_block *ib = lp->init_block_mem;
1197 u16 *mcast_table = (u16 *) &ib->filter;
1198 mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1199 }
1200 }
1201 }
1202
1203 static void lance_set_multicast(struct net_device *dev)
1204 {
1205 struct lance_private *lp = netdev_priv(dev);
1206 struct lance_init_block *ib_mem = lp->init_block_mem;
1207 struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1208 u16 mode;
1209
1210 if (!netif_running(dev))
1211 return;
1212
1213 if (lp->tx_old != lp->tx_new) {
1214 mod_timer(&lp->multicast_timer, jiffies + 4);
1215 netif_wake_queue(dev);
1216 return;
1217 }
1218
1219 netif_stop_queue(dev);
1220
1221 STOP_LANCE(lp);
1222 lp->init_ring(dev);
1223
1224 if (lp->pio_buffer)
1225 mode = sbus_readw(&ib_iomem->mode);
1226 else
1227 mode = ib_mem->mode;
1228 if (dev->flags & IFF_PROMISC) {
1229 mode |= LE_MO_PROM;
1230 if (lp->pio_buffer)
1231 sbus_writew(mode, &ib_iomem->mode);
1232 else
1233 ib_mem->mode = mode;
1234 } else {
1235 mode &= ~LE_MO_PROM;
1236 if (lp->pio_buffer)
1237 sbus_writew(mode, &ib_iomem->mode);
1238 else
1239 ib_mem->mode = mode;
1240 lance_load_multicast(dev);
1241 }
1242 load_csrs(lp);
1243 init_restart_lance(lp);
1244 netif_wake_queue(dev);
1245 }
1246
1247 static void lance_set_multicast_retry(struct timer_list *t)
1248 {
1249 struct lance_private *lp = from_timer(lp, t, multicast_timer);
1250 struct net_device *dev = lp->dev;
1251
1252 lance_set_multicast(dev);
1253 }
1254
1255 static void lance_free_hwresources(struct lance_private *lp)
1256 {
1257 if (lp->lregs)
1258 of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
1259 if (lp->dregs) {
1260 struct platform_device *ledma = lp->ledma;
1261
1262 of_iounmap(&ledma->resource[0], lp->dregs,
1263 resource_size(&ledma->resource[0]));
1264 }
1265 if (lp->init_block_iomem) {
1266 of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
1267 sizeof(struct lance_init_block));
1268 } else if (lp->init_block_mem) {
1269 dma_free_coherent(&lp->op->dev,
1270 sizeof(struct lance_init_block),
1271 lp->init_block_mem,
1272 lp->init_block_dvma);
1273 }
1274 }
1275
1276 /* Ethtool support... */
1277 static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1278 {
1279 strlcpy(info->driver, "sunlance", sizeof(info->driver));
1280 }
1281
1282 static const struct ethtool_ops sparc_lance_ethtool_ops = {
1283 .get_drvinfo = sparc_lance_get_drvinfo,
1284 .get_link = ethtool_op_get_link,
1285 };
1286
1287 static const struct net_device_ops sparc_lance_ops = {
1288 .ndo_open = lance_open,
1289 .ndo_stop = lance_close,
1290 .ndo_start_xmit = lance_start_xmit,
1291 .ndo_set_rx_mode = lance_set_multicast,
1292 .ndo_tx_timeout = lance_tx_timeout,
1293 .ndo_set_mac_address = eth_mac_addr,
1294 .ndo_validate_addr = eth_validate_addr,
1295 };
1296
1297 static int sparc_lance_probe_one(struct platform_device *op,
1298 struct platform_device *ledma,
1299 struct platform_device *lebuffer)
1300 {
1301 struct device_node *dp = op->dev.of_node;
1302 struct lance_private *lp;
1303 struct net_device *dev;
1304 int i;
1305
1306 dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1307 if (!dev)
1308 return -ENOMEM;
1309
1310 lp = netdev_priv(dev);
1311
1312 spin_lock_init(&lp->lock);
1313
1314 /* Copy the IDPROM ethernet address to the device structure, later we
1315 * will copy the address in the device structure to the lance
1316 * initialization block.
1317 */
1318 for (i = 0; i < 6; i++)
1319 dev->dev_addr[i] = idprom->id_ethaddr[i];
1320
1321 /* Get the IO region */
1322 lp->lregs = of_ioremap(&op->resource[0], 0,
1323 LANCE_REG_SIZE, lancestr);
1324 if (!lp->lregs) {
1325 printk(KERN_ERR "SunLance: Cannot map registers.\n");
1326 goto fail;
1327 }
1328
1329 lp->ledma = ledma;
1330 if (lp->ledma) {
1331 lp->dregs = of_ioremap(&ledma->resource[0], 0,
1332 resource_size(&ledma->resource[0]),
1333 "ledma");
1334 if (!lp->dregs) {
1335 printk(KERN_ERR "SunLance: Cannot map "
1336 "ledma registers.\n");
1337 goto fail;
1338 }
1339 }
1340
1341 lp->op = op;
1342 lp->lebuffer = lebuffer;
1343 if (lebuffer) {
1344 /* sanity check */
1345 if (lebuffer->resource[0].start & 7) {
1346 printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1347 goto fail;
1348 }
1349 lp->init_block_iomem =
1350 of_ioremap(&lebuffer->resource[0], 0,
1351 sizeof(struct lance_init_block), "lebuffer");
1352 if (!lp->init_block_iomem) {
1353 printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1354 goto fail;
1355 }
1356 lp->init_block_dvma = 0;
1357 lp->pio_buffer = 1;
1358 lp->init_ring = lance_init_ring_pio;
1359 lp->rx = lance_rx_pio;
1360 lp->tx = lance_tx_pio;
1361 } else {
1362 lp->init_block_mem =
1363 dma_alloc_coherent(&op->dev,
1364 sizeof(struct lance_init_block),
1365 &lp->init_block_dvma, GFP_ATOMIC);
1366 if (!lp->init_block_mem)
1367 goto fail;
1368
1369 lp->pio_buffer = 0;
1370 lp->init_ring = lance_init_ring_dvma;
1371 lp->rx = lance_rx_dvma;
1372 lp->tx = lance_tx_dvma;
1373 }
1374 lp->busmaster_regval = of_getintprop_default(dp, "busmaster-regval",
1375 (LE_C3_BSWP |
1376 LE_C3_ACON |
1377 LE_C3_BCON));
1378
1379 lp->name = lancestr;
1380
1381 lp->burst_sizes = 0;
1382 if (lp->ledma) {
1383 struct device_node *ledma_dp = ledma->dev.of_node;
1384 struct device_node *sbus_dp;
1385 unsigned int sbmask;
1386 const char *prop;
1387 u32 csr;
1388
1389 /* Find burst-size property for ledma */
1390 lp->burst_sizes = of_getintprop_default(ledma_dp,
1391 "burst-sizes", 0);
1392
1393 /* ledma may be capable of fast bursts, but sbus may not. */
1394 sbus_dp = ledma_dp->parent;
1395 sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
1396 DMA_BURSTBITS);
1397 lp->burst_sizes &= sbmask;
1398
1399 /* Get the cable-selection property */
1400 prop = of_get_property(ledma_dp, "cable-selection", NULL);
1401 if (!prop || prop[0] == '\0') {
1402 struct device_node *nd;
1403
1404 printk(KERN_INFO "SunLance: using "
1405 "auto-carrier-detection.\n");
1406
1407 nd = of_find_node_by_path("/options");
1408 if (!nd)
1409 goto no_link_test;
1410
1411 prop = of_get_property(nd, "tpe-link-test?", NULL);
1412 if (!prop)
1413 goto node_put;
1414
1415 if (strcmp(prop, "true")) {
1416 printk(KERN_NOTICE "SunLance: warning: overriding option "
1417 "'tpe-link-test?'\n");
1418 printk(KERN_NOTICE "SunLance: warning: mail any problems "
1419 "to ecd@skynet.be\n");
1420 auxio_set_lte(AUXIO_LTE_ON);
1421 }
1422 node_put:
1423 of_node_put(nd);
1424 no_link_test:
1425 lp->auto_select = 1;
1426 lp->tpe = 0;
1427 } else if (!strcmp(prop, "aui")) {
1428 lp->auto_select = 0;
1429 lp->tpe = 0;
1430 } else {
1431 lp->auto_select = 0;
1432 lp->tpe = 1;
1433 }
1434
1435 /* Reset ledma */
1436 csr = sbus_readl(lp->dregs + DMA_CSR);
1437 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1438 udelay(200);
1439 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1440 } else
1441 lp->dregs = NULL;
1442
1443 lp->dev = dev;
1444 SET_NETDEV_DEV(dev, &op->dev);
1445 dev->watchdog_timeo = 5*HZ;
1446 dev->ethtool_ops = &sparc_lance_ethtool_ops;
1447 dev->netdev_ops = &sparc_lance_ops;
1448
1449 dev->irq = op->archdata.irqs[0];
1450
1451 /* We cannot sleep if the chip is busy during a
1452 * multicast list update event, because such events
1453 * can occur from interrupts (ex. IPv6). So we
1454 * use a timer to try again later when necessary. -DaveM
1455 */
1456 timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
1457
1458 if (register_netdev(dev)) {
1459 printk(KERN_ERR "SunLance: Cannot register device.\n");
1460 goto fail;
1461 }
1462
1463 platform_set_drvdata(op, lp);
1464
1465 printk(KERN_INFO "%s: LANCE %pM\n",
1466 dev->name, dev->dev_addr);
1467
1468 return 0;
1469
1470 fail:
1471 lance_free_hwresources(lp);
1472 free_netdev(dev);
1473 return -ENODEV;
1474 }
1475
1476 static int sunlance_sbus_probe(struct platform_device *op)
1477 {
1478 struct platform_device *parent = to_platform_device(op->dev.parent);
1479 struct device_node *parent_dp = parent->dev.of_node;
1480 int err;
1481
1482 if (of_node_name_eq(parent_dp, "ledma")) {
1483 err = sparc_lance_probe_one(op, parent, NULL);
1484 } else if (of_node_name_eq(parent_dp, "lebuffer")) {
1485 err = sparc_lance_probe_one(op, NULL, parent);
1486 } else
1487 err = sparc_lance_probe_one(op, NULL, NULL);
1488
1489 return err;
1490 }
1491
1492 static int sunlance_sbus_remove(struct platform_device *op)
1493 {
1494 struct lance_private *lp = platform_get_drvdata(op);
1495 struct net_device *net_dev = lp->dev;
1496
1497 unregister_netdev(net_dev);
1498
1499 lance_free_hwresources(lp);
1500
1501 free_netdev(net_dev);
1502
1503 return 0;
1504 }
1505
1506 static const struct of_device_id sunlance_sbus_match[] = {
1507 {
1508 .name = "le",
1509 },
1510 {},
1511 };
1512
1513 MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1514
1515 static struct platform_driver sunlance_sbus_driver = {
1516 .driver = {
1517 .name = "sunlance",
1518 .of_match_table = sunlance_sbus_match,
1519 },
1520 .probe = sunlance_sbus_probe,
1521 .remove = sunlance_sbus_remove,
1522 };
1523
1524 module_platform_driver(sunlance_sbus_driver);
Linux with added FPC-III support