blob: b2577f40124e3917e40c094f40a559eb8b5965d8 [file] [log] [blame]
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Lance ethernet driver for the MIPS processor based
3 * DECstation family
4 *
5 *
6 * adopted from sunlance.c by Richard van den Berg
7 *
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08008 * Copyright (C) 2002, 2003, 2005, 2006 Maciej W. Rozycki
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 *
10 * additional sources:
11 * - PMAD-AA TURBOchannel Ethernet Module Functional Specification,
12 * Revision 1.2
13 *
14 * History:
15 *
16 * v0.001: The kernel accepts the code and it shows the hardware address.
17 *
18 * v0.002: Removed most sparc stuff, left only some module and dma stuff.
19 *
20 * v0.003: Enhanced base address calculation from proposals by
21 * Harald Koerfgen and Thomas Riemer.
22 *
23 * v0.004: lance-regs is pointing at the right addresses, added prom
24 * check. First start of address mapping and DMA.
25 *
26 * v0.005: started to play around with LANCE-DMA. This driver will not
27 * work for non IOASIC lances. HK
28 *
29 * v0.006: added pointer arrays to lance_private and setup routine for
30 * them in dec_lance_init. HK
31 *
32 * v0.007: Big shit. The LANCE seems to use a different DMA mechanism to
33 * access the init block. This looks like one (short) word at a
34 * time, but the smallest amount the IOASIC can transfer is a
35 * (long) word. So we have a 2-2 padding here. Changed
36 * lance_init_block accordingly. The 16-16 padding for the buffers
37 * seems to be correct. HK
38 *
39 * v0.008: mods to make PMAX_LANCE work. 01/09/1999 triemer
40 *
41 * v0.009: Module support fixes, multiple interfaces support, various
42 * bits. macro
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -080043 *
44 * v0.010: Fixes for the PMAD mapping of the LANCE buffer and for the
45 * PMAX requirement to only use halfword accesses to the
46 * buffer. macro
Maciej W. Rozycki257b3462007-02-05 16:28:27 -080047 *
48 * v0.011: Converted the PMAD to the driver model. macro
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 */
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <linux/crc32.h>
52#include <linux/delay.h>
53#include <linux/errno.h>
54#include <linux/if_ether.h>
55#include <linux/init.h>
56#include <linux/kernel.h>
57#include <linux/module.h>
58#include <linux/netdevice.h>
59#include <linux/etherdevice.h>
60#include <linux/spinlock.h>
61#include <linux/stddef.h>
62#include <linux/string.h>
Maciej W. Rozycki257b3462007-02-05 16:28:27 -080063#include <linux/tc.h>
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -080064#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
66#include <asm/addrspace.h>
Ralf Baechle36156cd2005-10-10 14:51:16 +010067#include <asm/system.h>
68
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#include <asm/dec/interrupts.h>
70#include <asm/dec/ioasic.h>
71#include <asm/dec/ioasic_addrs.h>
72#include <asm/dec/kn01.h>
73#include <asm/dec/machtype.h>
Ralf Baechle36156cd2005-10-10 14:51:16 +010074#include <asm/dec/system.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
76static char version[] __devinitdata =
Maciej W. Rozycki257b3462007-02-05 16:28:27 -080077"declance.c: v0.011 by Linux MIPS DECstation task force\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79MODULE_AUTHOR("Linux MIPS DECstation task force");
80MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
81MODULE_LICENSE("GPL");
82
Maciej W. Rozycki257b3462007-02-05 16:28:27 -080083#define __unused __attribute__ ((unused))
84
Linus Torvalds1da177e2005-04-16 15:20:36 -070085/*
86 * card types
87 */
88#define ASIC_LANCE 1
89#define PMAD_LANCE 2
90#define PMAX_LANCE 3
91
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
93#define LE_CSR0 0
94#define LE_CSR1 1
95#define LE_CSR2 2
96#define LE_CSR3 3
97
98#define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
99
100#define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
101#define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
102#define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
103#define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
104#define LE_C0_MERR 0x0800 /* ME: Memory error */
105#define LE_C0_RINT 0x0400 /* Received interrupt */
106#define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
107#define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
108#define LE_C0_INTR 0x0080 /* Interrupt or error */
109#define LE_C0_INEA 0x0040 /* Interrupt enable */
110#define LE_C0_RXON 0x0020 /* Receiver on */
111#define LE_C0_TXON 0x0010 /* Transmitter on */
112#define LE_C0_TDMD 0x0008 /* Transmitter demand */
113#define LE_C0_STOP 0x0004 /* Stop the card */
114#define LE_C0_STRT 0x0002 /* Start the card */
115#define LE_C0_INIT 0x0001 /* Init the card */
116
117#define LE_C3_BSWP 0x4 /* SWAP */
118#define LE_C3_ACON 0x2 /* ALE Control */
119#define LE_C3_BCON 0x1 /* Byte control */
120
121/* Receive message descriptor 1 */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800122#define LE_R1_OWN 0x8000 /* Who owns the entry */
123#define LE_R1_ERR 0x4000 /* Error: if FRA, OFL, CRC or BUF is set */
124#define LE_R1_FRA 0x2000 /* FRA: Frame error */
125#define LE_R1_OFL 0x1000 /* OFL: Frame overflow */
126#define LE_R1_CRC 0x0800 /* CRC error */
127#define LE_R1_BUF 0x0400 /* BUF: Buffer error */
128#define LE_R1_SOP 0x0200 /* Start of packet */
129#define LE_R1_EOP 0x0100 /* End of packet */
130#define LE_R1_POK 0x0300 /* Packet is complete: SOP + EOP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800132/* Transmit message descriptor 1 */
133#define LE_T1_OWN 0x8000 /* Lance owns the packet */
134#define LE_T1_ERR 0x4000 /* Error summary */
135#define LE_T1_EMORE 0x1000 /* Error: more than one retry needed */
136#define LE_T1_EONE 0x0800 /* Error: one retry needed */
137#define LE_T1_EDEF 0x0400 /* Error: deferred */
138#define LE_T1_SOP 0x0200 /* Start of packet */
139#define LE_T1_EOP 0x0100 /* End of packet */
140#define LE_T1_POK 0x0300 /* Packet is complete: SOP + EOP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142#define LE_T3_BUF 0x8000 /* Buffer error */
143#define LE_T3_UFL 0x4000 /* Error underflow */
144#define LE_T3_LCOL 0x1000 /* Error late collision */
145#define LE_T3_CLOS 0x0800 /* Error carrier loss */
146#define LE_T3_RTY 0x0400 /* Error retry */
147#define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
148
149/* Define: 2^4 Tx buffers and 2^4 Rx buffers */
150
151#ifndef LANCE_LOG_TX_BUFFERS
152#define LANCE_LOG_TX_BUFFERS 4
153#define LANCE_LOG_RX_BUFFERS 4
154#endif
155
156#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
157#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
158
159#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
160#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
161
162#define PKT_BUF_SZ 1536
163#define RX_BUFF_SIZE PKT_BUF_SZ
164#define TX_BUFF_SIZE PKT_BUF_SZ
165
166#undef TEST_HITS
167#define ZERO 0
168
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800169/*
170 * The DS2100/3100 have a linear 64 kB buffer which supports halfword
171 * accesses only. Each halfword of the buffer is word-aligned in the
172 * CPU address space.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 *
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800174 * The PMAD-AA has a 128 kB buffer on-board.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 *
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800176 * The IOASIC LANCE devices use a shared memory region. This region
177 * as seen from the CPU is (max) 128 kB long and has to be on an 128 kB
178 * boundary. The LANCE sees this as a 64 kB long continuous memory
179 * region.
180 *
181 * The LANCE's DMA address is used as an index in this buffer and DMA
182 * takes place in bursts of eight 16-bit words which are packed into
183 * four 32-bit words by the IOASIC. This leads to a strange padding:
184 * 16 bytes of valid data followed by a 16 byte gap :-(.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 */
186
187struct lance_rx_desc {
188 unsigned short rmd0; /* low address of packet */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800189 unsigned short rmd1; /* high address of packet
190 and descriptor bits */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 short length; /* 2s complement (negative!)
192 of buffer length */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 unsigned short mblength; /* actual number of bytes received */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194};
195
196struct lance_tx_desc {
197 unsigned short tmd0; /* low address of packet */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800198 unsigned short tmd1; /* high address of packet
199 and descriptor bits */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 short length; /* 2s complement (negative!)
201 of buffer length */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 unsigned short misc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203};
204
205
206/* First part of the LANCE initialization block, described in databook. */
207struct lance_init_block {
208 unsigned short mode; /* pre-set mode (reg. 15) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800210 unsigned short phys_addr[3]; /* physical ethernet address */
211 unsigned short filter[4]; /* multicast filter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
213 /* Receive and transmit ring base, along with extra bits. */
214 unsigned short rx_ptr; /* receive descriptor addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 unsigned short rx_len; /* receive len and high addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 unsigned short tx_ptr; /* transmit descriptor addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 unsigned short tx_len; /* transmit len and high addr */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800218
219 short gap[4];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
221 /* The buffer descriptors */
222 struct lance_rx_desc brx_ring[RX_RING_SIZE];
223 struct lance_tx_desc btx_ring[TX_RING_SIZE];
224};
225
226#define BUF_OFFSET_CPU sizeof(struct lance_init_block)
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800227#define BUF_OFFSET_LNC sizeof(struct lance_init_block)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800229#define shift_off(off, type) \
230 (type == ASIC_LANCE || type == PMAX_LANCE ? off << 1 : off)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800232#define lib_off(rt, type) \
233 shift_off(offsetof(struct lance_init_block, rt), type)
234
235#define lib_ptr(ib, rt, type) \
236 ((volatile u16 *)((u8 *)(ib) + lib_off(rt, type)))
237
238#define rds_off(rt, type) \
239 shift_off(offsetof(struct lance_rx_desc, rt), type)
240
241#define rds_ptr(rd, rt, type) \
242 ((volatile u16 *)((u8 *)(rd) + rds_off(rt, type)))
243
244#define tds_off(rt, type) \
245 shift_off(offsetof(struct lance_tx_desc, rt), type)
246
247#define tds_ptr(td, rt, type) \
248 ((volatile u16 *)((u8 *)(td) + tds_off(rt, type)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
250struct lance_private {
251 struct net_device *next;
252 int type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 int dma_irq;
254 volatile struct lance_regs *ll;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
256 spinlock_t lock;
257
258 int rx_new, tx_new;
259 int rx_old, tx_old;
260
261 struct net_device_stats stats;
262
263 unsigned short busmaster_regval;
264
265 struct timer_list multicast_timer;
266
267 /* Pointers to the ring buffers as seen from the CPU */
268 char *rx_buf_ptr_cpu[RX_RING_SIZE];
269 char *tx_buf_ptr_cpu[TX_RING_SIZE];
270
271 /* Pointers to the ring buffers as seen from the LANCE */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800272 uint rx_buf_ptr_lnc[RX_RING_SIZE];
273 uint tx_buf_ptr_lnc[TX_RING_SIZE];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274};
275
276#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
277 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
278 lp->tx_old - lp->tx_new-1)
279
280/* The lance control ports are at an absolute address, machine and tc-slot
281 * dependent.
282 * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
283 * so we have to give the structure an extra member making rap pointing
284 * at the right address
285 */
286struct lance_regs {
287 volatile unsigned short rdp; /* register data port */
288 unsigned short pad;
289 volatile unsigned short rap; /* register address port */
290};
291
292int dec_lance_debug = 2;
293
Maciej W. Rozycki257b3462007-02-05 16:28:27 -0800294static struct tc_driver dec_lance_tc_driver;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295static struct net_device *root_lance_dev;
296
297static inline void writereg(volatile unsigned short *regptr, short value)
298{
299 *regptr = value;
300 iob();
301}
302
303/* Load the CSR registers */
304static void load_csrs(struct lance_private *lp)
305{
306 volatile struct lance_regs *ll = lp->ll;
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800307 uint leptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
309 /* The address space as seen from the LANCE
310 * begins at address 0. HK
311 */
312 leptr = 0;
313
314 writereg(&ll->rap, LE_CSR1);
315 writereg(&ll->rdp, (leptr & 0xFFFF));
316 writereg(&ll->rap, LE_CSR2);
317 writereg(&ll->rdp, leptr >> 16);
318 writereg(&ll->rap, LE_CSR3);
319 writereg(&ll->rdp, lp->busmaster_regval);
320
321 /* Point back to csr0 */
322 writereg(&ll->rap, LE_CSR0);
323}
324
325/*
326 * Our specialized copy routines
327 *
328 */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800329static void cp_to_buf(const int type, void *to, const void *from, int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
331 unsigned short *tp, *fp, clen;
332 unsigned char *rtp, *rfp;
333
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800334 if (type == PMAD_LANCE) {
335 memcpy(to, from, len);
336 } else if (type == PMAX_LANCE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 clen = len >> 1;
338 tp = (unsigned short *) to;
339 fp = (unsigned short *) from;
340
341 while (clen--) {
342 *tp++ = *fp++;
343 tp++;
344 }
345
346 clen = len & 1;
347 rtp = (unsigned char *) tp;
348 rfp = (unsigned char *) fp;
349 while (clen--) {
350 *rtp++ = *rfp++;
351 }
352 } else {
353 /*
354 * copy 16 Byte chunks
355 */
356 clen = len >> 4;
357 tp = (unsigned short *) to;
358 fp = (unsigned short *) from;
359 while (clen--) {
360 *tp++ = *fp++;
361 *tp++ = *fp++;
362 *tp++ = *fp++;
363 *tp++ = *fp++;
364 *tp++ = *fp++;
365 *tp++ = *fp++;
366 *tp++ = *fp++;
367 *tp++ = *fp++;
368 tp += 8;
369 }
370
371 /*
372 * do the rest, if any.
373 */
374 clen = len & 15;
375 rtp = (unsigned char *) tp;
376 rfp = (unsigned char *) fp;
377 while (clen--) {
378 *rtp++ = *rfp++;
379 }
380 }
381
382 iob();
383}
384
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800385static void cp_from_buf(const int type, void *to, const void *from, int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386{
387 unsigned short *tp, *fp, clen;
388 unsigned char *rtp, *rfp;
389
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800390 if (type == PMAD_LANCE) {
391 memcpy(to, from, len);
392 } else if (type == PMAX_LANCE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 clen = len >> 1;
394 tp = (unsigned short *) to;
395 fp = (unsigned short *) from;
396 while (clen--) {
397 *tp++ = *fp++;
398 fp++;
399 }
400
401 clen = len & 1;
402
403 rtp = (unsigned char *) tp;
404 rfp = (unsigned char *) fp;
405
406 while (clen--) {
407 *rtp++ = *rfp++;
408 }
409 } else {
410
411 /*
412 * copy 16 Byte chunks
413 */
414 clen = len >> 4;
415 tp = (unsigned short *) to;
416 fp = (unsigned short *) from;
417 while (clen--) {
418 *tp++ = *fp++;
419 *tp++ = *fp++;
420 *tp++ = *fp++;
421 *tp++ = *fp++;
422 *tp++ = *fp++;
423 *tp++ = *fp++;
424 *tp++ = *fp++;
425 *tp++ = *fp++;
426 fp += 8;
427 }
428
429 /*
430 * do the rest, if any.
431 */
432 clen = len & 15;
433 rtp = (unsigned char *) tp;
434 rfp = (unsigned char *) fp;
435 while (clen--) {
436 *rtp++ = *rfp++;
437 }
438
439
440 }
441
442}
443
444/* Setup the Lance Rx and Tx rings */
445static void lance_init_ring(struct net_device *dev)
446{
447 struct lance_private *lp = netdev_priv(dev);
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800448 volatile u16 *ib = (volatile u16 *)dev->mem_start;
449 uint leptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 int i;
451
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 /* Lock out other processes while setting up hardware */
453 netif_stop_queue(dev);
454 lp->rx_new = lp->tx_new = 0;
455 lp->rx_old = lp->tx_old = 0;
456
457 /* Copy the ethernet address to the lance init block.
458 * XXX bit 0 of the physical address registers has to be zero
459 */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800460 *lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) |
461 dev->dev_addr[0];
462 *lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) |
463 dev->dev_addr[2];
464 *lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) |
465 dev->dev_addr[4];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 /* Setup the initialization block */
467
468 /* Setup rx descriptor pointer */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800469 leptr = offsetof(struct lance_init_block, brx_ring);
470 *lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) |
471 (leptr >> 16);
472 *lib_ptr(ib, rx_ptr, lp->type) = leptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 if (ZERO)
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800474 printk("RX ptr: %8.8x(%8.8x)\n",
475 leptr, lib_off(brx_ring, lp->type));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
477 /* Setup tx descriptor pointer */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800478 leptr = offsetof(struct lance_init_block, btx_ring);
479 *lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) |
480 (leptr >> 16);
481 *lib_ptr(ib, tx_ptr, lp->type) = leptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 if (ZERO)
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800483 printk("TX ptr: %8.8x(%8.8x)\n",
484 leptr, lib_off(btx_ring, lp->type));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
486 if (ZERO)
487 printk("TX rings:\n");
488
489 /* Setup the Tx ring entries */
490 for (i = 0; i < TX_RING_SIZE; i++) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800491 leptr = lp->tx_buf_ptr_lnc[i];
492 *lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr;
493 *lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) &
494 0xff;
495 *lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000;
496 /* The ones required by tmd2 */
497 *lib_ptr(ib, btx_ring[i].misc, lp->type) = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 if (i < 3 && ZERO)
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800499 printk("%d: 0x%8.8x(0x%8.8x)\n",
500 i, leptr, (uint)lp->tx_buf_ptr_cpu[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 }
502
503 /* Setup the Rx ring entries */
504 if (ZERO)
505 printk("RX rings:\n");
506 for (i = 0; i < RX_RING_SIZE; i++) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800507 leptr = lp->rx_buf_ptr_lnc[i];
508 *lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr;
509 *lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) &
510 0xff) |
511 LE_R1_OWN;
512 *lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE |
513 0xf000;
514 *lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 if (i < 3 && ZERO)
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800516 printk("%d: 0x%8.8x(0x%8.8x)\n",
517 i, leptr, (uint)lp->rx_buf_ptr_cpu[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 }
519 iob();
520}
521
522static int init_restart_lance(struct lance_private *lp)
523{
524 volatile struct lance_regs *ll = lp->ll;
525 int i;
526
527 writereg(&ll->rap, LE_CSR0);
528 writereg(&ll->rdp, LE_C0_INIT);
529
530 /* Wait for the lance to complete initialization */
531 for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
532 udelay(10);
533 }
534 if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800535 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
536 i, ll->rdp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 return -1;
538 }
539 if ((ll->rdp & LE_C0_ERR)) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800540 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
541 i, ll->rdp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 return -1;
543 }
544 writereg(&ll->rdp, LE_C0_IDON);
545 writereg(&ll->rdp, LE_C0_STRT);
546 writereg(&ll->rdp, LE_C0_INEA);
547
548 return 0;
549}
550
551static int lance_rx(struct net_device *dev)
552{
553 struct lance_private *lp = netdev_priv(dev);
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800554 volatile u16 *ib = (volatile u16 *)dev->mem_start;
555 volatile u16 *rd;
556 unsigned short bits;
557 int entry, len;
558 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
560#ifdef TEST_HITS
561 {
562 int i;
563
564 printk("[");
565 for (i = 0; i < RX_RING_SIZE; i++) {
566 if (i == lp->rx_new)
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800567 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
568 lp->type) &
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 LE_R1_OWN ? "_" : "X");
570 else
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800571 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
572 lp->type) &
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 LE_R1_OWN ? "." : "1");
574 }
575 printk("]");
576 }
577#endif
578
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800579 for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type);
580 !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN);
581 rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) {
582 entry = lp->rx_new;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583
584 /* We got an incomplete frame? */
585 if ((bits & LE_R1_POK) != LE_R1_POK) {
586 lp->stats.rx_over_errors++;
587 lp->stats.rx_errors++;
588 } else if (bits & LE_R1_ERR) {
589 /* Count only the end frame as a rx error,
590 * not the beginning
591 */
592 if (bits & LE_R1_BUF)
593 lp->stats.rx_fifo_errors++;
594 if (bits & LE_R1_CRC)
595 lp->stats.rx_crc_errors++;
596 if (bits & LE_R1_OFL)
597 lp->stats.rx_over_errors++;
598 if (bits & LE_R1_FRA)
599 lp->stats.rx_frame_errors++;
600 if (bits & LE_R1_EOP)
601 lp->stats.rx_errors++;
602 } else {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800603 len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 skb = dev_alloc_skb(len + 2);
605
606 if (skb == 0) {
607 printk("%s: Memory squeeze, deferring packet.\n",
608 dev->name);
609 lp->stats.rx_dropped++;
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800610 *rds_ptr(rd, mblength, lp->type) = 0;
611 *rds_ptr(rd, rmd1, lp->type) =
612 ((lp->rx_buf_ptr_lnc[entry] >> 16) &
613 0xff) | LE_R1_OWN;
614 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 return 0;
616 }
617 lp->stats.rx_bytes += len;
618
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 skb_reserve(skb, 2); /* 16 byte align */
620 skb_put(skb, len); /* make room */
621
622 cp_from_buf(lp->type, skb->data,
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800623 (char *)lp->rx_buf_ptr_cpu[entry], len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624
625 skb->protocol = eth_type_trans(skb, dev);
626 netif_rx(skb);
627 dev->last_rx = jiffies;
628 lp->stats.rx_packets++;
629 }
630
631 /* Return the packet to the pool */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800632 *rds_ptr(rd, mblength, lp->type) = 0;
633 *rds_ptr(rd, length, lp->type) = -RX_BUFF_SIZE | 0xf000;
634 *rds_ptr(rd, rmd1, lp->type) =
635 ((lp->rx_buf_ptr_lnc[entry] >> 16) & 0xff) | LE_R1_OWN;
636 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 }
638 return 0;
639}
640
641static void lance_tx(struct net_device *dev)
642{
643 struct lance_private *lp = netdev_priv(dev);
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800644 volatile u16 *ib = (volatile u16 *)dev->mem_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 volatile struct lance_regs *ll = lp->ll;
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800646 volatile u16 *td;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 int i, j;
648 int status;
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800649
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 j = lp->tx_old;
651
652 spin_lock(&lp->lock);
653
654 for (i = j; i != lp->tx_new; i = j) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800655 td = lib_ptr(ib, btx_ring[i], lp->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 /* If we hit a packet not owned by us, stop */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800657 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_OWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 break;
659
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800660 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_ERR) {
661 status = *tds_ptr(td, misc, lp->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662
663 lp->stats.tx_errors++;
664 if (status & LE_T3_RTY)
665 lp->stats.tx_aborted_errors++;
666 if (status & LE_T3_LCOL)
667 lp->stats.tx_window_errors++;
668
669 if (status & LE_T3_CLOS) {
670 lp->stats.tx_carrier_errors++;
671 printk("%s: Carrier Lost\n", dev->name);
672 /* Stop the lance */
673 writereg(&ll->rap, LE_CSR0);
674 writereg(&ll->rdp, LE_C0_STOP);
675 lance_init_ring(dev);
676 load_csrs(lp);
677 init_restart_lance(lp);
678 goto out;
679 }
680 /* Buffer errors and underflows turn off the
681 * transmitter, restart the adapter.
682 */
683 if (status & (LE_T3_BUF | LE_T3_UFL)) {
684 lp->stats.tx_fifo_errors++;
685
686 printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
687 dev->name);
688 /* Stop the lance */
689 writereg(&ll->rap, LE_CSR0);
690 writereg(&ll->rdp, LE_C0_STOP);
691 lance_init_ring(dev);
692 load_csrs(lp);
693 init_restart_lance(lp);
694 goto out;
695 }
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800696 } else if ((*tds_ptr(td, tmd1, lp->type) & LE_T1_POK) ==
697 LE_T1_POK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 /*
699 * So we don't count the packet more than once.
700 */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800701 *tds_ptr(td, tmd1, lp->type) &= ~(LE_T1_POK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
703 /* One collision before packet was sent. */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800704 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EONE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 lp->stats.collisions++;
706
707 /* More than one collision, be optimistic. */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800708 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 lp->stats.collisions += 2;
710
711 lp->stats.tx_packets++;
712 }
713 j = (j + 1) & TX_RING_MOD_MASK;
714 }
715 lp->tx_old = j;
716out:
717 if (netif_queue_stopped(dev) &&
718 TX_BUFFS_AVAIL > 0)
719 netif_wake_queue(dev);
720
721 spin_unlock(&lp->lock);
722}
723
David Howells7d12e782006-10-05 14:55:46 +0100724static irqreturn_t lance_dma_merr_int(const int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725{
Jeff Garzikc31f28e2006-10-06 14:56:04 -0400726 struct net_device *dev = dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727
728 printk("%s: DMA error\n", dev->name);
Ralf Baechleda848ec2005-10-10 14:51:01 +0100729 return IRQ_HANDLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730}
731
David Howells7d12e782006-10-05 14:55:46 +0100732static irqreturn_t lance_interrupt(const int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733{
Jeff Garzikc31f28e2006-10-06 14:56:04 -0400734 struct net_device *dev = dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 struct lance_private *lp = netdev_priv(dev);
736 volatile struct lance_regs *ll = lp->ll;
737 int csr0;
738
739 writereg(&ll->rap, LE_CSR0);
740 csr0 = ll->rdp;
741
742 /* Acknowledge all the interrupt sources ASAP */
743 writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
744
745 if ((csr0 & LE_C0_ERR)) {
746 /* Clear the error condition */
747 writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
748 LE_C0_CERR | LE_C0_MERR);
749 }
750 if (csr0 & LE_C0_RINT)
751 lance_rx(dev);
752
753 if (csr0 & LE_C0_TINT)
754 lance_tx(dev);
755
756 if (csr0 & LE_C0_BABL)
757 lp->stats.tx_errors++;
758
759 if (csr0 & LE_C0_MISS)
760 lp->stats.rx_errors++;
761
762 if (csr0 & LE_C0_MERR) {
763 printk("%s: Memory error, status %04x\n", dev->name, csr0);
764
765 writereg(&ll->rdp, LE_C0_STOP);
766
767 lance_init_ring(dev);
768 load_csrs(lp);
769 init_restart_lance(lp);
770 netif_wake_queue(dev);
771 }
772
773 writereg(&ll->rdp, LE_C0_INEA);
774 writereg(&ll->rdp, LE_C0_INEA);
775 return IRQ_HANDLED;
776}
777
778struct net_device *last_dev = 0;
779
780static int lance_open(struct net_device *dev)
781{
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800782 volatile u16 *ib = (volatile u16 *)dev->mem_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 struct lance_private *lp = netdev_priv(dev);
784 volatile struct lance_regs *ll = lp->ll;
785 int status = 0;
786
787 last_dev = dev;
788
789 /* Stop the Lance */
790 writereg(&ll->rap, LE_CSR0);
791 writereg(&ll->rdp, LE_C0_STOP);
792
793 /* Set mode and clear multicast filter only at device open,
794 * so that lance_init_ring() called at any error will not
795 * forget multicast filters.
796 *
797 * BTW it is common bug in all lance drivers! --ANK
798 */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800799 *lib_ptr(ib, mode, lp->type) = 0;
800 *lib_ptr(ib, filter[0], lp->type) = 0;
801 *lib_ptr(ib, filter[1], lp->type) = 0;
802 *lib_ptr(ib, filter[2], lp->type) = 0;
803 *lib_ptr(ib, filter[3], lp->type) = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804
805 lance_init_ring(dev);
806 load_csrs(lp);
807
808 netif_start_queue(dev);
809
810 /* Associate IRQ with lance_interrupt */
811 if (request_irq(dev->irq, &lance_interrupt, 0, "lance", dev)) {
812 printk("%s: Can't get IRQ %d\n", dev->name, dev->irq);
813 return -EAGAIN;
814 }
815 if (lp->dma_irq >= 0) {
816 unsigned long flags;
817
818 if (request_irq(lp->dma_irq, &lance_dma_merr_int, 0,
819 "lance error", dev)) {
820 free_irq(dev->irq, dev);
821 printk("%s: Can't get DMA IRQ %d\n", dev->name,
822 lp->dma_irq);
823 return -EAGAIN;
824 }
825
826 spin_lock_irqsave(&ioasic_ssr_lock, flags);
827
828 fast_mb();
829 /* Enable I/O ASIC LANCE DMA. */
830 ioasic_write(IO_REG_SSR,
831 ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN);
832
833 fast_mb();
834 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
835 }
836
837 status = init_restart_lance(lp);
838 return status;
839}
840
841static int lance_close(struct net_device *dev)
842{
843 struct lance_private *lp = netdev_priv(dev);
844 volatile struct lance_regs *ll = lp->ll;
845
846 netif_stop_queue(dev);
847 del_timer_sync(&lp->multicast_timer);
848
849 /* Stop the card */
850 writereg(&ll->rap, LE_CSR0);
851 writereg(&ll->rdp, LE_C0_STOP);
852
853 if (lp->dma_irq >= 0) {
854 unsigned long flags;
855
856 spin_lock_irqsave(&ioasic_ssr_lock, flags);
857
858 fast_mb();
859 /* Disable I/O ASIC LANCE DMA. */
860 ioasic_write(IO_REG_SSR,
861 ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN);
862
863 fast_iob();
864 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
865
866 free_irq(lp->dma_irq, dev);
867 }
868 free_irq(dev->irq, dev);
869 return 0;
870}
871
872static inline int lance_reset(struct net_device *dev)
873{
874 struct lance_private *lp = netdev_priv(dev);
875 volatile struct lance_regs *ll = lp->ll;
876 int status;
877
878 /* Stop the lance */
879 writereg(&ll->rap, LE_CSR0);
880 writereg(&ll->rdp, LE_C0_STOP);
881
882 lance_init_ring(dev);
883 load_csrs(lp);
884 dev->trans_start = jiffies;
885 status = init_restart_lance(lp);
886 return status;
887}
888
889static void lance_tx_timeout(struct net_device *dev)
890{
891 struct lance_private *lp = netdev_priv(dev);
892 volatile struct lance_regs *ll = lp->ll;
893
894 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
895 dev->name, ll->rdp);
896 lance_reset(dev);
897 netif_wake_queue(dev);
898}
899
900static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
901{
902 struct lance_private *lp = netdev_priv(dev);
903 volatile struct lance_regs *ll = lp->ll;
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800904 volatile u16 *ib = (volatile u16 *)dev->mem_start;
905 int entry, len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800907 len = skb->len;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400908
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 if (len < ETH_ZLEN) {
Herbert Xu5b057c62006-06-23 02:06:41 -0700910 if (skb_padto(skb, ETH_ZLEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 return 0;
912 len = ETH_ZLEN;
913 }
914
915 lp->stats.tx_bytes += len;
916
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800917 entry = lp->tx_new;
918 *lib_ptr(ib, btx_ring[entry].length, lp->type) = (-len);
919 *lib_ptr(ib, btx_ring[entry].misc, lp->type) = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800921 cp_to_buf(lp->type, (char *)lp->tx_buf_ptr_cpu[entry], skb->data, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922
923 /* Now, give the packet to the lance */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800924 *lib_ptr(ib, btx_ring[entry].tmd1, lp->type) =
925 ((lp->tx_buf_ptr_lnc[entry] >> 16) & 0xff) |
926 (LE_T1_POK | LE_T1_OWN);
927 lp->tx_new = (entry + 1) & TX_RING_MOD_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928
929 if (TX_BUFFS_AVAIL <= 0)
930 netif_stop_queue(dev);
931
932 /* Kick the lance: transmit now */
933 writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
934
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 dev->trans_start = jiffies;
936 dev_kfree_skb(skb);
937
938 return 0;
939}
940
941static struct net_device_stats *lance_get_stats(struct net_device *dev)
942{
943 struct lance_private *lp = netdev_priv(dev);
944
945 return &lp->stats;
946}
947
948static void lance_load_multicast(struct net_device *dev)
949{
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800950 struct lance_private *lp = netdev_priv(dev);
951 volatile u16 *ib = (volatile u16 *)dev->mem_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 struct dev_mc_list *dmi = dev->mc_list;
953 char *addrs;
954 int i;
955 u32 crc;
956
957 /* set all multicast bits */
958 if (dev->flags & IFF_ALLMULTI) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800959 *lib_ptr(ib, filter[0], lp->type) = 0xffff;
960 *lib_ptr(ib, filter[1], lp->type) = 0xffff;
961 *lib_ptr(ib, filter[2], lp->type) = 0xffff;
962 *lib_ptr(ib, filter[3], lp->type) = 0xffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963 return;
964 }
965 /* clear the multicast filter */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800966 *lib_ptr(ib, filter[0], lp->type) = 0;
967 *lib_ptr(ib, filter[1], lp->type) = 0;
968 *lib_ptr(ib, filter[2], lp->type) = 0;
969 *lib_ptr(ib, filter[3], lp->type) = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970
971 /* Add addresses */
972 for (i = 0; i < dev->mc_count; i++) {
973 addrs = dmi->dmi_addr;
974 dmi = dmi->next;
975
976 /* multicast address? */
977 if (!(*addrs & 1))
978 continue;
979
980 crc = ether_crc_le(ETH_ALEN, addrs);
981 crc = crc >> 26;
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800982 *lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 }
984 return;
985}
986
987static void lance_set_multicast(struct net_device *dev)
988{
989 struct lance_private *lp = netdev_priv(dev);
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800990 volatile u16 *ib = (volatile u16 *)dev->mem_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 volatile struct lance_regs *ll = lp->ll;
992
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 if (!netif_running(dev))
994 return;
995
996 if (lp->tx_old != lp->tx_new) {
997 mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100);
998 netif_wake_queue(dev);
999 return;
1000 }
1001
1002 netif_stop_queue(dev);
1003
1004 writereg(&ll->rap, LE_CSR0);
1005 writereg(&ll->rdp, LE_C0_STOP);
1006
1007 lance_init_ring(dev);
1008
1009 if (dev->flags & IFF_PROMISC) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001010 *lib_ptr(ib, mode, lp->type) |= LE_MO_PROM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011 } else {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001012 *lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 lance_load_multicast(dev);
1014 }
1015 load_csrs(lp);
1016 init_restart_lance(lp);
1017 netif_wake_queue(dev);
1018}
1019
1020static void lance_set_multicast_retry(unsigned long _opaque)
1021{
1022 struct net_device *dev = (struct net_device *) _opaque;
1023
1024 lance_set_multicast(dev);
1025}
1026
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001027static int __init dec_lance_probe(struct device *bdev, const int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028{
1029 static unsigned version_printed;
1030 static const char fmt[] = "declance%d";
1031 char name[10];
1032 struct net_device *dev;
1033 struct lance_private *lp;
1034 volatile struct lance_regs *ll;
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001035 resource_size_t start = 0, len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 int i, ret;
1037 unsigned long esar_base;
1038 unsigned char *esar;
1039
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 if (dec_lance_debug && version_printed++ == 0)
1041 printk(version);
1042
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001043 if (bdev)
1044 snprintf(name, sizeof(name), "%s", bdev->bus_id);
1045 else {
1046 i = 0;
1047 dev = root_lance_dev;
1048 while (dev) {
1049 i++;
1050 lp = (struct lance_private *)dev->priv;
1051 dev = lp->next;
1052 }
1053 snprintf(name, sizeof(name), fmt, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055
1056 dev = alloc_etherdev(sizeof(struct lance_private));
1057 if (!dev) {
1058 printk(KERN_ERR "%s: Unable to allocate etherdev, aborting.\n",
1059 name);
1060 ret = -ENOMEM;
1061 goto err_out;
1062 }
1063
1064 /*
1065 * alloc_etherdev ensures the data structures used by the LANCE
1066 * are aligned.
1067 */
1068 lp = netdev_priv(dev);
1069 spin_lock_init(&lp->lock);
1070
1071 lp->type = type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 switch (type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 case ASIC_LANCE:
Ralf Baechle36156cd2005-10-10 14:51:16 +01001074 dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075
1076 /* buffer space for the on-board LANCE shared memory */
1077 /*
1078 * FIXME: ugly hack!
1079 */
Ralf Baechle45695042005-10-10 14:51:11 +01001080 dev->mem_start = CKSEG1ADDR(0x00020000);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 dev->mem_end = dev->mem_start + 0x00020000;
1082 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
Ralf Baechle36156cd2005-10-10 14:51:16 +01001083 esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084
1085 /* Workaround crash with booting KN04 2.1k from Disk */
1086 memset((void *)dev->mem_start, 0,
1087 dev->mem_end - dev->mem_start);
1088
1089 /*
1090 * setup the pointer arrays, this sucks [tm] :-(
1091 */
1092 for (i = 0; i < RX_RING_SIZE; i++) {
1093 lp->rx_buf_ptr_cpu[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001094 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 2 * i * RX_BUFF_SIZE);
1096 lp->rx_buf_ptr_lnc[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001097 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 }
1099 for (i = 0; i < TX_RING_SIZE; i++) {
1100 lp->tx_buf_ptr_cpu[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001101 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1103 2 * i * TX_BUFF_SIZE);
1104 lp->tx_buf_ptr_lnc[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001105 (BUF_OFFSET_LNC +
1106 RX_RING_SIZE * RX_BUFF_SIZE +
1107 i * TX_BUFF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 }
1109
1110 /* Setup I/O ASIC LANCE DMA. */
1111 lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1112 ioasic_write(IO_REG_LANCE_DMA_P,
Ralf Baechle6684b4e2005-10-10 14:51:06 +01001113 CPHYSADDR(dev->mem_start) << 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114
1115 break;
Maciej W. Rozyckie8f7f7f2006-12-04 15:04:55 -08001116#ifdef CONFIG_TC
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 case PMAD_LANCE:
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001118 dev_set_drvdata(bdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001120 start = to_tc_dev(bdev)->resource.start;
1121 len = to_tc_dev(bdev)->resource.end - start + 1;
1122 if (!request_mem_region(start, len, bdev->bus_id)) {
1123 printk(KERN_ERR
1124 "%s: Unable to reserve MMIO resource\n",
1125 bdev->bus_id);
1126 ret = -EBUSY;
1127 goto err_out_dev;
1128 }
1129
1130 dev->mem_start = CKSEG1ADDR(start);
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001131 dev->mem_end = dev->mem_start + 0x100000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 dev->base_addr = dev->mem_start + 0x100000;
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001133 dev->irq = to_tc_dev(bdev)->interrupt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 esar_base = dev->mem_start + 0x1c0002;
1135 lp->dma_irq = -1;
1136
1137 for (i = 0; i < RX_RING_SIZE; i++) {
1138 lp->rx_buf_ptr_cpu[i] =
1139 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1140 i * RX_BUFF_SIZE);
1141 lp->rx_buf_ptr_lnc[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001142 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 }
1144 for (i = 0; i < TX_RING_SIZE; i++) {
1145 lp->tx_buf_ptr_cpu[i] =
1146 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1147 RX_RING_SIZE * RX_BUFF_SIZE +
1148 i * TX_BUFF_SIZE);
1149 lp->tx_buf_ptr_lnc[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001150 (BUF_OFFSET_LNC +
1151 RX_RING_SIZE * RX_BUFF_SIZE +
1152 i * TX_BUFF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 }
1154
1155 break;
1156#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 case PMAX_LANCE:
1158 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
Ralf Baechle36156cd2005-10-10 14:51:16 +01001159 dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1160 dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001161 dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
Ralf Baechle36156cd2005-10-10 14:51:16 +01001162 esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 lp->dma_irq = -1;
1164
1165 /*
1166 * setup the pointer arrays, this sucks [tm] :-(
1167 */
1168 for (i = 0; i < RX_RING_SIZE; i++) {
1169 lp->rx_buf_ptr_cpu[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001170 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 2 * i * RX_BUFF_SIZE);
1172 lp->rx_buf_ptr_lnc[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001173 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 }
1175 for (i = 0; i < TX_RING_SIZE; i++) {
1176 lp->tx_buf_ptr_cpu[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001177 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1179 2 * i * TX_BUFF_SIZE);
1180 lp->tx_buf_ptr_lnc[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001181 (BUF_OFFSET_LNC +
1182 RX_RING_SIZE * RX_BUFF_SIZE +
1183 i * TX_BUFF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 }
1185
1186 break;
1187
1188 default:
1189 printk(KERN_ERR "%s: declance_init called with unknown type\n",
1190 name);
1191 ret = -ENODEV;
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001192 goto err_out_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 }
1194
1195 ll = (struct lance_regs *) dev->base_addr;
1196 esar = (unsigned char *) esar_base;
1197
1198 /* prom checks */
1199 /* First, check for test pattern */
1200 if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1201 esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1202 printk(KERN_ERR
1203 "%s: Ethernet station address prom not found!\n",
1204 name);
1205 ret = -ENODEV;
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001206 goto err_out_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 }
1208 /* Check the prom contents */
1209 for (i = 0; i < 8; i++) {
1210 if (esar[i * 4] != esar[0x3c - i * 4] &&
1211 esar[i * 4] != esar[0x40 + i * 4] &&
1212 esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1213 printk(KERN_ERR "%s: Something is wrong with the "
1214 "ethernet station address prom!\n", name);
1215 ret = -ENODEV;
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001216 goto err_out_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 }
1218 }
1219
1220 /* Copy the ethernet address to the device structure, later to the
1221 * lance initialization block so the lance gets it every time it's
1222 * (re)initialized.
1223 */
1224 switch (type) {
1225 case ASIC_LANCE:
1226 printk("%s: IOASIC onboard LANCE, addr = ", name);
1227 break;
1228 case PMAD_LANCE:
1229 printk("%s: PMAD-AA, addr = ", name);
1230 break;
1231 case PMAX_LANCE:
1232 printk("%s: PMAX onboard LANCE, addr = ", name);
1233 break;
1234 }
1235 for (i = 0; i < 6; i++) {
1236 dev->dev_addr[i] = esar[i * 4];
1237 printk("%2.2x%c", dev->dev_addr[i], i == 5 ? ',' : ':');
1238 }
1239
1240 printk(" irq = %d\n", dev->irq);
1241
1242 dev->open = &lance_open;
1243 dev->stop = &lance_close;
1244 dev->hard_start_xmit = &lance_start_xmit;
1245 dev->tx_timeout = &lance_tx_timeout;
1246 dev->watchdog_timeo = 5*HZ;
1247 dev->get_stats = &lance_get_stats;
1248 dev->set_multicast_list = &lance_set_multicast;
1249
1250 /* lp->ll is the location of the registers for lance card */
1251 lp->ll = ll;
1252
1253 /* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1254 * specification.
1255 */
1256 lp->busmaster_regval = 0;
1257
1258 dev->dma = 0;
1259
1260 /* We cannot sleep if the chip is busy during a
1261 * multicast list update event, because such events
1262 * can occur from interrupts (ex. IPv6). So we
1263 * use a timer to try again later when necessary. -DaveM
1264 */
1265 init_timer(&lp->multicast_timer);
1266 lp->multicast_timer.data = (unsigned long) dev;
1267 lp->multicast_timer.function = &lance_set_multicast_retry;
1268
1269 ret = register_netdev(dev);
1270 if (ret) {
1271 printk(KERN_ERR
1272 "%s: Unable to register netdev, aborting.\n", name);
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001273 goto err_out_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 }
1275
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001276 if (!bdev) {
1277 lp->next = root_lance_dev;
1278 root_lance_dev = dev;
1279 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280
1281 printk("%s: registered as %s.\n", name, dev->name);
1282 return 0;
1283
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001284err_out_resource:
1285 if (bdev)
1286 release_mem_region(start, len);
1287
1288err_out_dev:
Ralf Baechleb07db752006-06-30 13:56:13 +01001289 free_netdev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290
1291err_out:
1292 return ret;
1293}
1294
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001295static void __exit dec_lance_remove(struct device *bdev)
1296{
1297 struct net_device *dev = dev_get_drvdata(bdev);
1298 resource_size_t start, len;
1299
1300 unregister_netdev(dev);
1301 start = to_tc_dev(bdev)->resource.start;
1302 len = to_tc_dev(bdev)->resource.end - start + 1;
1303 release_mem_region(start, len);
1304 free_netdev(dev);
1305}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306
1307/* Find all the lance cards on the system and initialize them */
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001308static int __init dec_lance_platform_probe(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309{
1310 int count = 0;
1311
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1313 if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001314 if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 } else if (!TURBOCHANNEL) {
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001317 if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 count++;
1319 }
1320 }
1321
1322 return (count > 0) ? 0 : -ENODEV;
1323}
1324
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001325static void __exit dec_lance_platform_remove(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326{
1327 while (root_lance_dev) {
1328 struct net_device *dev = root_lance_dev;
1329 struct lance_private *lp = netdev_priv(dev);
Ralf Baechleb07db752006-06-30 13:56:13 +01001330
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 unregister_netdev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 root_lance_dev = lp->next;
1333 free_netdev(dev);
1334 }
1335}
1336
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001337#ifdef CONFIG_TC
1338static int __init dec_lance_tc_probe(struct device *dev);
1339static int __exit dec_lance_tc_remove(struct device *dev);
1340
1341static const struct tc_device_id dec_lance_tc_table[] = {
1342 { "DEC ", "PMAD-AA " },
1343 { }
1344};
1345MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
1346
1347static struct tc_driver dec_lance_tc_driver = {
1348 .id_table = dec_lance_tc_table,
1349 .driver = {
1350 .name = "declance",
1351 .bus = &tc_bus_type,
1352 .probe = dec_lance_tc_probe,
1353 .remove = __exit_p(dec_lance_tc_remove),
1354 },
1355};
1356
1357static int __init dec_lance_tc_probe(struct device *dev)
1358{
1359 int status = dec_lance_probe(dev, PMAD_LANCE);
1360 if (!status)
1361 get_device(dev);
1362 return status;
1363}
1364
1365static int __exit dec_lance_tc_remove(struct device *dev)
1366{
1367 put_device(dev);
1368 dec_lance_remove(dev);
1369 return 0;
1370}
1371#endif
1372
1373static int __init dec_lance_init(void)
1374{
1375 int status;
1376
1377 status = tc_register_driver(&dec_lance_tc_driver);
1378 if (!status)
1379 dec_lance_platform_probe();
1380 return status;
1381}
1382
1383static void __exit dec_lance_exit(void)
1384{
1385 dec_lance_platform_remove();
1386 tc_unregister_driver(&dec_lance_tc_driver);
1387}
1388
1389
1390module_init(dec_lance_init);
1391module_exit(dec_lance_exit);