blob: 7ce3053530f9c62279f38dd17340e89167b6044b [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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 unsigned short busmaster_regval;
262
263 struct timer_list multicast_timer;
264
265 /* Pointers to the ring buffers as seen from the CPU */
266 char *rx_buf_ptr_cpu[RX_RING_SIZE];
267 char *tx_buf_ptr_cpu[TX_RING_SIZE];
268
269 /* Pointers to the ring buffers as seen from the LANCE */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800270 uint rx_buf_ptr_lnc[RX_RING_SIZE];
271 uint tx_buf_ptr_lnc[TX_RING_SIZE];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272};
273
274#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
275 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
276 lp->tx_old - lp->tx_new-1)
277
278/* The lance control ports are at an absolute address, machine and tc-slot
279 * dependent.
280 * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
281 * so we have to give the structure an extra member making rap pointing
282 * at the right address
283 */
284struct lance_regs {
285 volatile unsigned short rdp; /* register data port */
286 unsigned short pad;
287 volatile unsigned short rap; /* register address port */
288};
289
290int dec_lance_debug = 2;
291
Maciej W. Rozycki257b3462007-02-05 16:28:27 -0800292static struct tc_driver dec_lance_tc_driver;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293static struct net_device *root_lance_dev;
294
295static inline void writereg(volatile unsigned short *regptr, short value)
296{
297 *regptr = value;
298 iob();
299}
300
301/* Load the CSR registers */
302static void load_csrs(struct lance_private *lp)
303{
304 volatile struct lance_regs *ll = lp->ll;
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800305 uint leptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306
307 /* The address space as seen from the LANCE
308 * begins at address 0. HK
309 */
310 leptr = 0;
311
312 writereg(&ll->rap, LE_CSR1);
313 writereg(&ll->rdp, (leptr & 0xFFFF));
314 writereg(&ll->rap, LE_CSR2);
315 writereg(&ll->rdp, leptr >> 16);
316 writereg(&ll->rap, LE_CSR3);
317 writereg(&ll->rdp, lp->busmaster_regval);
318
319 /* Point back to csr0 */
320 writereg(&ll->rap, LE_CSR0);
321}
322
323/*
324 * Our specialized copy routines
325 *
326 */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800327static void cp_to_buf(const int type, void *to, const void *from, int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328{
329 unsigned short *tp, *fp, clen;
330 unsigned char *rtp, *rfp;
331
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800332 if (type == PMAD_LANCE) {
333 memcpy(to, from, len);
334 } else if (type == PMAX_LANCE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 clen = len >> 1;
336 tp = (unsigned short *) to;
337 fp = (unsigned short *) from;
338
339 while (clen--) {
340 *tp++ = *fp++;
341 tp++;
342 }
343
344 clen = len & 1;
345 rtp = (unsigned char *) tp;
346 rfp = (unsigned char *) fp;
347 while (clen--) {
348 *rtp++ = *rfp++;
349 }
350 } else {
351 /*
352 * copy 16 Byte chunks
353 */
354 clen = len >> 4;
355 tp = (unsigned short *) to;
356 fp = (unsigned short *) from;
357 while (clen--) {
358 *tp++ = *fp++;
359 *tp++ = *fp++;
360 *tp++ = *fp++;
361 *tp++ = *fp++;
362 *tp++ = *fp++;
363 *tp++ = *fp++;
364 *tp++ = *fp++;
365 *tp++ = *fp++;
366 tp += 8;
367 }
368
369 /*
370 * do the rest, if any.
371 */
372 clen = len & 15;
373 rtp = (unsigned char *) tp;
374 rfp = (unsigned char *) fp;
375 while (clen--) {
376 *rtp++ = *rfp++;
377 }
378 }
379
380 iob();
381}
382
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800383static void cp_from_buf(const int type, void *to, const void *from, int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384{
385 unsigned short *tp, *fp, clen;
386 unsigned char *rtp, *rfp;
387
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800388 if (type == PMAD_LANCE) {
389 memcpy(to, from, len);
390 } else if (type == PMAX_LANCE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 clen = len >> 1;
392 tp = (unsigned short *) to;
393 fp = (unsigned short *) from;
394 while (clen--) {
395 *tp++ = *fp++;
396 fp++;
397 }
398
399 clen = len & 1;
400
401 rtp = (unsigned char *) tp;
402 rfp = (unsigned char *) fp;
403
404 while (clen--) {
405 *rtp++ = *rfp++;
406 }
407 } else {
408
409 /*
410 * copy 16 Byte chunks
411 */
412 clen = len >> 4;
413 tp = (unsigned short *) to;
414 fp = (unsigned short *) from;
415 while (clen--) {
416 *tp++ = *fp++;
417 *tp++ = *fp++;
418 *tp++ = *fp++;
419 *tp++ = *fp++;
420 *tp++ = *fp++;
421 *tp++ = *fp++;
422 *tp++ = *fp++;
423 *tp++ = *fp++;
424 fp += 8;
425 }
426
427 /*
428 * do the rest, if any.
429 */
430 clen = len & 15;
431 rtp = (unsigned char *) tp;
432 rfp = (unsigned char *) fp;
433 while (clen--) {
434 *rtp++ = *rfp++;
435 }
436
437
438 }
439
440}
441
442/* Setup the Lance Rx and Tx rings */
443static void lance_init_ring(struct net_device *dev)
444{
445 struct lance_private *lp = netdev_priv(dev);
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800446 volatile u16 *ib = (volatile u16 *)dev->mem_start;
447 uint leptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 int i;
449
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 /* Lock out other processes while setting up hardware */
451 netif_stop_queue(dev);
452 lp->rx_new = lp->tx_new = 0;
453 lp->rx_old = lp->tx_old = 0;
454
455 /* Copy the ethernet address to the lance init block.
456 * XXX bit 0 of the physical address registers has to be zero
457 */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800458 *lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) |
459 dev->dev_addr[0];
460 *lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) |
461 dev->dev_addr[2];
462 *lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) |
463 dev->dev_addr[4];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 /* Setup the initialization block */
465
466 /* Setup rx descriptor pointer */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800467 leptr = offsetof(struct lance_init_block, brx_ring);
468 *lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) |
469 (leptr >> 16);
470 *lib_ptr(ib, rx_ptr, lp->type) = leptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 if (ZERO)
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800472 printk("RX ptr: %8.8x(%8.8x)\n",
473 leptr, lib_off(brx_ring, lp->type));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
475 /* Setup tx descriptor pointer */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800476 leptr = offsetof(struct lance_init_block, btx_ring);
477 *lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) |
478 (leptr >> 16);
479 *lib_ptr(ib, tx_ptr, lp->type) = leptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 if (ZERO)
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800481 printk("TX ptr: %8.8x(%8.8x)\n",
482 leptr, lib_off(btx_ring, lp->type));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
484 if (ZERO)
485 printk("TX rings:\n");
486
487 /* Setup the Tx ring entries */
488 for (i = 0; i < TX_RING_SIZE; i++) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800489 leptr = lp->tx_buf_ptr_lnc[i];
490 *lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr;
491 *lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) &
492 0xff;
493 *lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000;
494 /* The ones required by tmd2 */
495 *lib_ptr(ib, btx_ring[i].misc, lp->type) = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 if (i < 3 && ZERO)
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800497 printk("%d: 0x%8.8x(0x%8.8x)\n",
498 i, leptr, (uint)lp->tx_buf_ptr_cpu[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 }
500
501 /* Setup the Rx ring entries */
502 if (ZERO)
503 printk("RX rings:\n");
504 for (i = 0; i < RX_RING_SIZE; i++) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800505 leptr = lp->rx_buf_ptr_lnc[i];
506 *lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr;
507 *lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) &
508 0xff) |
509 LE_R1_OWN;
510 *lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE |
511 0xf000;
512 *lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 if (i < 3 && ZERO)
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800514 printk("%d: 0x%8.8x(0x%8.8x)\n",
515 i, leptr, (uint)lp->rx_buf_ptr_cpu[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 }
517 iob();
518}
519
520static int init_restart_lance(struct lance_private *lp)
521{
522 volatile struct lance_regs *ll = lp->ll;
523 int i;
524
525 writereg(&ll->rap, LE_CSR0);
526 writereg(&ll->rdp, LE_C0_INIT);
527
528 /* Wait for the lance to complete initialization */
529 for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
530 udelay(10);
531 }
532 if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800533 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
534 i, ll->rdp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 return -1;
536 }
537 if ((ll->rdp & LE_C0_ERR)) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800538 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
539 i, ll->rdp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 return -1;
541 }
542 writereg(&ll->rdp, LE_C0_IDON);
543 writereg(&ll->rdp, LE_C0_STRT);
544 writereg(&ll->rdp, LE_C0_INEA);
545
546 return 0;
547}
548
549static int lance_rx(struct net_device *dev)
550{
551 struct lance_private *lp = netdev_priv(dev);
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800552 volatile u16 *ib = (volatile u16 *)dev->mem_start;
553 volatile u16 *rd;
554 unsigned short bits;
555 int entry, len;
556 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
558#ifdef TEST_HITS
559 {
560 int i;
561
562 printk("[");
563 for (i = 0; i < RX_RING_SIZE; i++) {
564 if (i == lp->rx_new)
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800565 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
566 lp->type) &
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 LE_R1_OWN ? "_" : "X");
568 else
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800569 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
570 lp->type) &
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 LE_R1_OWN ? "." : "1");
572 }
573 printk("]");
574 }
575#endif
576
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800577 for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type);
578 !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN);
579 rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) {
580 entry = lp->rx_new;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
582 /* We got an incomplete frame? */
583 if ((bits & LE_R1_POK) != LE_R1_POK) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700584 dev->stats.rx_over_errors++;
585 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 } else if (bits & LE_R1_ERR) {
587 /* Count only the end frame as a rx error,
588 * not the beginning
589 */
590 if (bits & LE_R1_BUF)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700591 dev->stats.rx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 if (bits & LE_R1_CRC)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700593 dev->stats.rx_crc_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 if (bits & LE_R1_OFL)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700595 dev->stats.rx_over_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 if (bits & LE_R1_FRA)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700597 dev->stats.rx_frame_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 if (bits & LE_R1_EOP)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700599 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 } else {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800601 len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 skb = dev_alloc_skb(len + 2);
603
604 if (skb == 0) {
605 printk("%s: Memory squeeze, deferring packet.\n",
606 dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700607 dev->stats.rx_dropped++;
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800608 *rds_ptr(rd, mblength, lp->type) = 0;
609 *rds_ptr(rd, rmd1, lp->type) =
610 ((lp->rx_buf_ptr_lnc[entry] >> 16) &
611 0xff) | LE_R1_OWN;
612 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 return 0;
614 }
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700615 dev->stats.rx_bytes += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 skb_reserve(skb, 2); /* 16 byte align */
618 skb_put(skb, len); /* make room */
619
620 cp_from_buf(lp->type, skb->data,
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800621 (char *)lp->rx_buf_ptr_cpu[entry], len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
623 skb->protocol = eth_type_trans(skb, dev);
624 netif_rx(skb);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700625 dev->stats.rx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 }
627
628 /* Return the packet to the pool */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800629 *rds_ptr(rd, mblength, lp->type) = 0;
630 *rds_ptr(rd, length, lp->type) = -RX_BUFF_SIZE | 0xf000;
631 *rds_ptr(rd, rmd1, lp->type) =
632 ((lp->rx_buf_ptr_lnc[entry] >> 16) & 0xff) | LE_R1_OWN;
633 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 }
635 return 0;
636}
637
638static void lance_tx(struct net_device *dev)
639{
640 struct lance_private *lp = netdev_priv(dev);
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800641 volatile u16 *ib = (volatile u16 *)dev->mem_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 volatile struct lance_regs *ll = lp->ll;
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800643 volatile u16 *td;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 int i, j;
645 int status;
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800646
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 j = lp->tx_old;
648
649 spin_lock(&lp->lock);
650
651 for (i = j; i != lp->tx_new; i = j) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800652 td = lib_ptr(ib, btx_ring[i], lp->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 /* If we hit a packet not owned by us, stop */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800654 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_OWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 break;
656
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800657 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_ERR) {
658 status = *tds_ptr(td, misc, lp->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700660 dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 if (status & LE_T3_RTY)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700662 dev->stats.tx_aborted_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 if (status & LE_T3_LCOL)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700664 dev->stats.tx_window_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665
666 if (status & LE_T3_CLOS) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700667 dev->stats.tx_carrier_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 printk("%s: Carrier Lost\n", dev->name);
669 /* Stop the lance */
670 writereg(&ll->rap, LE_CSR0);
671 writereg(&ll->rdp, LE_C0_STOP);
672 lance_init_ring(dev);
673 load_csrs(lp);
674 init_restart_lance(lp);
675 goto out;
676 }
677 /* Buffer errors and underflows turn off the
678 * transmitter, restart the adapter.
679 */
680 if (status & (LE_T3_BUF | LE_T3_UFL)) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700681 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
683 printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
684 dev->name);
685 /* Stop the lance */
686 writereg(&ll->rap, LE_CSR0);
687 writereg(&ll->rdp, LE_C0_STOP);
688 lance_init_ring(dev);
689 load_csrs(lp);
690 init_restart_lance(lp);
691 goto out;
692 }
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800693 } else if ((*tds_ptr(td, tmd1, lp->type) & LE_T1_POK) ==
694 LE_T1_POK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 /*
696 * So we don't count the packet more than once.
697 */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800698 *tds_ptr(td, tmd1, lp->type) &= ~(LE_T1_POK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699
700 /* One collision before packet was sent. */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800701 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EONE)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700702 dev->stats.collisions++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703
704 /* More than one collision, be optimistic. */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800705 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700706 dev->stats.collisions += 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700708 dev->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 }
710 j = (j + 1) & TX_RING_MOD_MASK;
711 }
712 lp->tx_old = j;
713out:
714 if (netif_queue_stopped(dev) &&
715 TX_BUFFS_AVAIL > 0)
716 netif_wake_queue(dev);
717
718 spin_unlock(&lp->lock);
719}
720
Jeff Garzik28fc1f52007-10-29 05:46:16 -0400721static irqreturn_t lance_dma_merr_int(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722{
Jeff Garzikc31f28e2006-10-06 14:56:04 -0400723 struct net_device *dev = dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724
Jeff Garzik28fc1f52007-10-29 05:46:16 -0400725 printk(KERN_ERR "%s: DMA error\n", dev->name);
Ralf Baechleda848ec2005-10-10 14:51:01 +0100726 return IRQ_HANDLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727}
728
Jeff Garzik28fc1f52007-10-29 05:46:16 -0400729static irqreturn_t lance_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730{
Jeff Garzikc31f28e2006-10-06 14:56:04 -0400731 struct net_device *dev = dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 struct lance_private *lp = netdev_priv(dev);
733 volatile struct lance_regs *ll = lp->ll;
734 int csr0;
735
736 writereg(&ll->rap, LE_CSR0);
737 csr0 = ll->rdp;
738
739 /* Acknowledge all the interrupt sources ASAP */
740 writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
741
742 if ((csr0 & LE_C0_ERR)) {
743 /* Clear the error condition */
744 writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
745 LE_C0_CERR | LE_C0_MERR);
746 }
747 if (csr0 & LE_C0_RINT)
748 lance_rx(dev);
749
750 if (csr0 & LE_C0_TINT)
751 lance_tx(dev);
752
753 if (csr0 & LE_C0_BABL)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700754 dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755
756 if (csr0 & LE_C0_MISS)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700757 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758
759 if (csr0 & LE_C0_MERR) {
760 printk("%s: Memory error, status %04x\n", dev->name, csr0);
761
762 writereg(&ll->rdp, LE_C0_STOP);
763
764 lance_init_ring(dev);
765 load_csrs(lp);
766 init_restart_lance(lp);
767 netif_wake_queue(dev);
768 }
769
770 writereg(&ll->rdp, LE_C0_INEA);
771 writereg(&ll->rdp, LE_C0_INEA);
772 return IRQ_HANDLED;
773}
774
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775static int lance_open(struct net_device *dev)
776{
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800777 volatile u16 *ib = (volatile u16 *)dev->mem_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 struct lance_private *lp = netdev_priv(dev);
779 volatile struct lance_regs *ll = lp->ll;
780 int status = 0;
781
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 /* Stop the Lance */
783 writereg(&ll->rap, LE_CSR0);
784 writereg(&ll->rdp, LE_C0_STOP);
785
786 /* Set mode and clear multicast filter only at device open,
787 * so that lance_init_ring() called at any error will not
788 * forget multicast filters.
789 *
790 * BTW it is common bug in all lance drivers! --ANK
791 */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800792 *lib_ptr(ib, mode, lp->type) = 0;
793 *lib_ptr(ib, filter[0], lp->type) = 0;
794 *lib_ptr(ib, filter[1], lp->type) = 0;
795 *lib_ptr(ib, filter[2], lp->type) = 0;
796 *lib_ptr(ib, filter[3], lp->type) = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797
798 lance_init_ring(dev);
799 load_csrs(lp);
800
801 netif_start_queue(dev);
802
803 /* Associate IRQ with lance_interrupt */
804 if (request_irq(dev->irq, &lance_interrupt, 0, "lance", dev)) {
805 printk("%s: Can't get IRQ %d\n", dev->name, dev->irq);
806 return -EAGAIN;
807 }
808 if (lp->dma_irq >= 0) {
809 unsigned long flags;
810
811 if (request_irq(lp->dma_irq, &lance_dma_merr_int, 0,
812 "lance error", dev)) {
813 free_irq(dev->irq, dev);
814 printk("%s: Can't get DMA IRQ %d\n", dev->name,
815 lp->dma_irq);
816 return -EAGAIN;
817 }
818
819 spin_lock_irqsave(&ioasic_ssr_lock, flags);
820
821 fast_mb();
822 /* Enable I/O ASIC LANCE DMA. */
823 ioasic_write(IO_REG_SSR,
824 ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN);
825
826 fast_mb();
827 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
828 }
829
830 status = init_restart_lance(lp);
831 return status;
832}
833
834static int lance_close(struct net_device *dev)
835{
836 struct lance_private *lp = netdev_priv(dev);
837 volatile struct lance_regs *ll = lp->ll;
838
839 netif_stop_queue(dev);
840 del_timer_sync(&lp->multicast_timer);
841
842 /* Stop the card */
843 writereg(&ll->rap, LE_CSR0);
844 writereg(&ll->rdp, LE_C0_STOP);
845
846 if (lp->dma_irq >= 0) {
847 unsigned long flags;
848
849 spin_lock_irqsave(&ioasic_ssr_lock, flags);
850
851 fast_mb();
852 /* Disable I/O ASIC LANCE DMA. */
853 ioasic_write(IO_REG_SSR,
854 ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN);
855
856 fast_iob();
857 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
858
859 free_irq(lp->dma_irq, dev);
860 }
861 free_irq(dev->irq, dev);
862 return 0;
863}
864
865static inline int lance_reset(struct net_device *dev)
866{
867 struct lance_private *lp = netdev_priv(dev);
868 volatile struct lance_regs *ll = lp->ll;
869 int status;
870
871 /* Stop the lance */
872 writereg(&ll->rap, LE_CSR0);
873 writereg(&ll->rdp, LE_C0_STOP);
874
875 lance_init_ring(dev);
876 load_csrs(lp);
877 dev->trans_start = jiffies;
878 status = init_restart_lance(lp);
879 return status;
880}
881
882static void lance_tx_timeout(struct net_device *dev)
883{
884 struct lance_private *lp = netdev_priv(dev);
885 volatile struct lance_regs *ll = lp->ll;
886
887 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
888 dev->name, ll->rdp);
889 lance_reset(dev);
890 netif_wake_queue(dev);
891}
892
893static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
894{
895 struct lance_private *lp = netdev_priv(dev);
896 volatile struct lance_regs *ll = lp->ll;
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800897 volatile u16 *ib = (volatile u16 *)dev->mem_start;
898 int entry, len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800900 len = skb->len;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400901
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 if (len < ETH_ZLEN) {
Herbert Xu5b057c62006-06-23 02:06:41 -0700903 if (skb_padto(skb, ETH_ZLEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 return 0;
905 len = ETH_ZLEN;
906 }
907
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700908 dev->stats.tx_bytes += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800910 entry = lp->tx_new;
911 *lib_ptr(ib, btx_ring[entry].length, lp->type) = (-len);
912 *lib_ptr(ib, btx_ring[entry].misc, lp->type) = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800914 cp_to_buf(lp->type, (char *)lp->tx_buf_ptr_cpu[entry], skb->data, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915
916 /* Now, give the packet to the lance */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800917 *lib_ptr(ib, btx_ring[entry].tmd1, lp->type) =
918 ((lp->tx_buf_ptr_lnc[entry] >> 16) & 0xff) |
919 (LE_T1_POK | LE_T1_OWN);
920 lp->tx_new = (entry + 1) & TX_RING_MOD_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921
922 if (TX_BUFFS_AVAIL <= 0)
923 netif_stop_queue(dev);
924
925 /* Kick the lance: transmit now */
926 writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
927
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 dev->trans_start = jiffies;
929 dev_kfree_skb(skb);
930
931 return 0;
932}
933
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934static void lance_load_multicast(struct net_device *dev)
935{
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800936 struct lance_private *lp = netdev_priv(dev);
937 volatile u16 *ib = (volatile u16 *)dev->mem_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 struct dev_mc_list *dmi = dev->mc_list;
939 char *addrs;
940 int i;
941 u32 crc;
942
943 /* set all multicast bits */
944 if (dev->flags & IFF_ALLMULTI) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800945 *lib_ptr(ib, filter[0], lp->type) = 0xffff;
946 *lib_ptr(ib, filter[1], lp->type) = 0xffff;
947 *lib_ptr(ib, filter[2], lp->type) = 0xffff;
948 *lib_ptr(ib, filter[3], lp->type) = 0xffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 return;
950 }
951 /* clear the multicast filter */
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800952 *lib_ptr(ib, filter[0], lp->type) = 0;
953 *lib_ptr(ib, filter[1], lp->type) = 0;
954 *lib_ptr(ib, filter[2], lp->type) = 0;
955 *lib_ptr(ib, filter[3], lp->type) = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956
957 /* Add addresses */
958 for (i = 0; i < dev->mc_count; i++) {
959 addrs = dmi->dmi_addr;
960 dmi = dmi->next;
961
962 /* multicast address? */
963 if (!(*addrs & 1))
964 continue;
965
966 crc = ether_crc_le(ETH_ALEN, addrs);
967 crc = crc >> 26;
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800968 *lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 }
970 return;
971}
972
973static void lance_set_multicast(struct net_device *dev)
974{
975 struct lance_private *lp = netdev_priv(dev);
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800976 volatile u16 *ib = (volatile u16 *)dev->mem_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 volatile struct lance_regs *ll = lp->ll;
978
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 if (!netif_running(dev))
980 return;
981
982 if (lp->tx_old != lp->tx_new) {
983 mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100);
984 netif_wake_queue(dev);
985 return;
986 }
987
988 netif_stop_queue(dev);
989
990 writereg(&ll->rap, LE_CSR0);
991 writereg(&ll->rdp, LE_C0_STOP);
992
993 lance_init_ring(dev);
994
995 if (dev->flags & IFF_PROMISC) {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800996 *lib_ptr(ib, mode, lp->type) |= LE_MO_PROM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 } else {
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -0800998 *lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 lance_load_multicast(dev);
1000 }
1001 load_csrs(lp);
1002 init_restart_lance(lp);
1003 netif_wake_queue(dev);
1004}
1005
1006static void lance_set_multicast_retry(unsigned long _opaque)
1007{
1008 struct net_device *dev = (struct net_device *) _opaque;
1009
1010 lance_set_multicast(dev);
1011}
1012
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001013static int __init dec_lance_probe(struct device *bdev, const int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014{
1015 static unsigned version_printed;
1016 static const char fmt[] = "declance%d";
1017 char name[10];
1018 struct net_device *dev;
1019 struct lance_private *lp;
1020 volatile struct lance_regs *ll;
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001021 resource_size_t start = 0, len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 int i, ret;
1023 unsigned long esar_base;
1024 unsigned char *esar;
1025
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 if (dec_lance_debug && version_printed++ == 0)
1027 printk(version);
1028
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001029 if (bdev)
1030 snprintf(name, sizeof(name), "%s", bdev->bus_id);
1031 else {
1032 i = 0;
1033 dev = root_lance_dev;
1034 while (dev) {
1035 i++;
Wang Chen4cf16532008-11-12 23:38:14 -08001036 lp = netdev_priv(dev);
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001037 dev = lp->next;
1038 }
1039 snprintf(name, sizeof(name), fmt, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041
1042 dev = alloc_etherdev(sizeof(struct lance_private));
1043 if (!dev) {
1044 printk(KERN_ERR "%s: Unable to allocate etherdev, aborting.\n",
1045 name);
1046 ret = -ENOMEM;
1047 goto err_out;
1048 }
1049
1050 /*
1051 * alloc_etherdev ensures the data structures used by the LANCE
1052 * are aligned.
1053 */
1054 lp = netdev_priv(dev);
1055 spin_lock_init(&lp->lock);
1056
1057 lp->type = type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 switch (type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 case ASIC_LANCE:
Ralf Baechle36156cd2005-10-10 14:51:16 +01001060 dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
1062 /* buffer space for the on-board LANCE shared memory */
1063 /*
1064 * FIXME: ugly hack!
1065 */
Ralf Baechle45695042005-10-10 14:51:11 +01001066 dev->mem_start = CKSEG1ADDR(0x00020000);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 dev->mem_end = dev->mem_start + 0x00020000;
1068 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
Ralf Baechle36156cd2005-10-10 14:51:16 +01001069 esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070
1071 /* Workaround crash with booting KN04 2.1k from Disk */
1072 memset((void *)dev->mem_start, 0,
1073 dev->mem_end - dev->mem_start);
1074
1075 /*
1076 * setup the pointer arrays, this sucks [tm] :-(
1077 */
1078 for (i = 0; i < RX_RING_SIZE; i++) {
1079 lp->rx_buf_ptr_cpu[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001080 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 2 * i * RX_BUFF_SIZE);
1082 lp->rx_buf_ptr_lnc[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001083 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 }
1085 for (i = 0; i < TX_RING_SIZE; i++) {
1086 lp->tx_buf_ptr_cpu[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001087 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1089 2 * i * TX_BUFF_SIZE);
1090 lp->tx_buf_ptr_lnc[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001091 (BUF_OFFSET_LNC +
1092 RX_RING_SIZE * RX_BUFF_SIZE +
1093 i * TX_BUFF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 }
1095
1096 /* Setup I/O ASIC LANCE DMA. */
1097 lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1098 ioasic_write(IO_REG_LANCE_DMA_P,
Ralf Baechle6684b4e2005-10-10 14:51:06 +01001099 CPHYSADDR(dev->mem_start) << 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100
1101 break;
Maciej W. Rozyckie8f7f7f2006-12-04 15:04:55 -08001102#ifdef CONFIG_TC
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 case PMAD_LANCE:
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001104 dev_set_drvdata(bdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001106 start = to_tc_dev(bdev)->resource.start;
1107 len = to_tc_dev(bdev)->resource.end - start + 1;
1108 if (!request_mem_region(start, len, bdev->bus_id)) {
1109 printk(KERN_ERR
1110 "%s: Unable to reserve MMIO resource\n",
1111 bdev->bus_id);
1112 ret = -EBUSY;
1113 goto err_out_dev;
1114 }
1115
1116 dev->mem_start = CKSEG1ADDR(start);
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001117 dev->mem_end = dev->mem_start + 0x100000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 dev->base_addr = dev->mem_start + 0x100000;
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001119 dev->irq = to_tc_dev(bdev)->interrupt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 esar_base = dev->mem_start + 0x1c0002;
1121 lp->dma_irq = -1;
1122
1123 for (i = 0; i < RX_RING_SIZE; i++) {
1124 lp->rx_buf_ptr_cpu[i] =
1125 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1126 i * RX_BUFF_SIZE);
1127 lp->rx_buf_ptr_lnc[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001128 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 }
1130 for (i = 0; i < TX_RING_SIZE; i++) {
1131 lp->tx_buf_ptr_cpu[i] =
1132 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1133 RX_RING_SIZE * RX_BUFF_SIZE +
1134 i * TX_BUFF_SIZE);
1135 lp->tx_buf_ptr_lnc[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001136 (BUF_OFFSET_LNC +
1137 RX_RING_SIZE * RX_BUFF_SIZE +
1138 i * TX_BUFF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 }
1140
1141 break;
1142#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 case PMAX_LANCE:
1144 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
Ralf Baechle36156cd2005-10-10 14:51:16 +01001145 dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1146 dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001147 dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
Ralf Baechle36156cd2005-10-10 14:51:16 +01001148 esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 lp->dma_irq = -1;
1150
1151 /*
1152 * setup the pointer arrays, this sucks [tm] :-(
1153 */
1154 for (i = 0; i < RX_RING_SIZE; i++) {
1155 lp->rx_buf_ptr_cpu[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001156 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 2 * i * RX_BUFF_SIZE);
1158 lp->rx_buf_ptr_lnc[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001159 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 }
1161 for (i = 0; i < TX_RING_SIZE; i++) {
1162 lp->tx_buf_ptr_cpu[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001163 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1165 2 * i * TX_BUFF_SIZE);
1166 lp->tx_buf_ptr_lnc[i] =
Maciej W. Rozycki3b6e8fe2006-12-04 15:04:54 -08001167 (BUF_OFFSET_LNC +
1168 RX_RING_SIZE * RX_BUFF_SIZE +
1169 i * TX_BUFF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 }
1171
1172 break;
1173
1174 default:
1175 printk(KERN_ERR "%s: declance_init called with unknown type\n",
1176 name);
1177 ret = -ENODEV;
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001178 goto err_out_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 }
1180
1181 ll = (struct lance_regs *) dev->base_addr;
1182 esar = (unsigned char *) esar_base;
1183
1184 /* prom checks */
1185 /* First, check for test pattern */
1186 if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1187 esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1188 printk(KERN_ERR
1189 "%s: Ethernet station address prom not found!\n",
1190 name);
1191 ret = -ENODEV;
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001192 goto err_out_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 }
1194 /* Check the prom contents */
1195 for (i = 0; i < 8; i++) {
1196 if (esar[i * 4] != esar[0x3c - i * 4] &&
1197 esar[i * 4] != esar[0x40 + i * 4] &&
1198 esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1199 printk(KERN_ERR "%s: Something is wrong with the "
1200 "ethernet station address prom!\n", name);
1201 ret = -ENODEV;
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001202 goto err_out_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 }
1204 }
1205
1206 /* Copy the ethernet address to the device structure, later to the
1207 * lance initialization block so the lance gets it every time it's
1208 * (re)initialized.
1209 */
1210 switch (type) {
1211 case ASIC_LANCE:
Joe Perches0795af52007-10-03 17:59:30 -07001212 printk("%s: IOASIC onboard LANCE", name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 break;
1214 case PMAD_LANCE:
Joe Perches0795af52007-10-03 17:59:30 -07001215 printk("%s: PMAD-AA", name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 break;
1217 case PMAX_LANCE:
Joe Perches0795af52007-10-03 17:59:30 -07001218 printk("%s: PMAX onboard LANCE", name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 break;
1220 }
Joe Perches0795af52007-10-03 17:59:30 -07001221 for (i = 0; i < 6; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 dev->dev_addr[i] = esar[i * 4];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223
Johannes Berge1749612008-10-27 15:59:26 -07001224 printk(", addr = %pM, irq = %d\n", dev->dev_addr, dev->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
1226 dev->open = &lance_open;
1227 dev->stop = &lance_close;
1228 dev->hard_start_xmit = &lance_start_xmit;
1229 dev->tx_timeout = &lance_tx_timeout;
1230 dev->watchdog_timeo = 5*HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 dev->set_multicast_list = &lance_set_multicast;
1232
1233 /* lp->ll is the location of the registers for lance card */
1234 lp->ll = ll;
1235
1236 /* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1237 * specification.
1238 */
1239 lp->busmaster_regval = 0;
1240
1241 dev->dma = 0;
1242
1243 /* We cannot sleep if the chip is busy during a
1244 * multicast list update event, because such events
1245 * can occur from interrupts (ex. IPv6). So we
1246 * use a timer to try again later when necessary. -DaveM
1247 */
1248 init_timer(&lp->multicast_timer);
1249 lp->multicast_timer.data = (unsigned long) dev;
1250 lp->multicast_timer.function = &lance_set_multicast_retry;
1251
1252 ret = register_netdev(dev);
1253 if (ret) {
1254 printk(KERN_ERR
1255 "%s: Unable to register netdev, aborting.\n", name);
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001256 goto err_out_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257 }
1258
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001259 if (!bdev) {
1260 lp->next = root_lance_dev;
1261 root_lance_dev = dev;
1262 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263
1264 printk("%s: registered as %s.\n", name, dev->name);
1265 return 0;
1266
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001267err_out_resource:
1268 if (bdev)
1269 release_mem_region(start, len);
1270
1271err_out_dev:
Ralf Baechleb07db752006-06-30 13:56:13 +01001272 free_netdev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273
1274err_out:
1275 return ret;
1276}
1277
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001278static void __exit dec_lance_remove(struct device *bdev)
1279{
1280 struct net_device *dev = dev_get_drvdata(bdev);
1281 resource_size_t start, len;
1282
1283 unregister_netdev(dev);
1284 start = to_tc_dev(bdev)->resource.start;
1285 len = to_tc_dev(bdev)->resource.end - start + 1;
1286 release_mem_region(start, len);
1287 free_netdev(dev);
1288}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289
1290/* Find all the lance cards on the system and initialize them */
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001291static int __init dec_lance_platform_probe(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292{
1293 int count = 0;
1294
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1296 if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001297 if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 } else if (!TURBOCHANNEL) {
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001300 if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 count++;
1302 }
1303 }
1304
1305 return (count > 0) ? 0 : -ENODEV;
1306}
1307
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001308static void __exit dec_lance_platform_remove(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309{
1310 while (root_lance_dev) {
1311 struct net_device *dev = root_lance_dev;
1312 struct lance_private *lp = netdev_priv(dev);
Ralf Baechleb07db752006-06-30 13:56:13 +01001313
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 unregister_netdev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 root_lance_dev = lp->next;
1316 free_netdev(dev);
1317 }
1318}
1319
Maciej W. Rozycki257b3462007-02-05 16:28:27 -08001320#ifdef CONFIG_TC
1321static int __init dec_lance_tc_probe(struct device *dev);
1322static int __exit dec_lance_tc_remove(struct device *dev);
1323
1324static const struct tc_device_id dec_lance_tc_table[] = {
1325 { "DEC ", "PMAD-AA " },
1326 { }
1327};
1328MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
1329
1330static struct tc_driver dec_lance_tc_driver = {
1331 .id_table = dec_lance_tc_table,
1332 .driver = {
1333 .name = "declance",
1334 .bus = &tc_bus_type,
1335 .probe = dec_lance_tc_probe,
1336 .remove = __exit_p(dec_lance_tc_remove),
1337 },
1338};
1339
1340static int __init dec_lance_tc_probe(struct device *dev)
1341{
1342 int status = dec_lance_probe(dev, PMAD_LANCE);
1343 if (!status)
1344 get_device(dev);
1345 return status;
1346}
1347
1348static int __exit dec_lance_tc_remove(struct device *dev)
1349{
1350 put_device(dev);
1351 dec_lance_remove(dev);
1352 return 0;
1353}
1354#endif
1355
1356static int __init dec_lance_init(void)
1357{
1358 int status;
1359
1360 status = tc_register_driver(&dec_lance_tc_driver);
1361 if (!status)
1362 dec_lance_platform_probe();
1363 return status;
1364}
1365
1366static void __exit dec_lance_exit(void)
1367{
1368 dec_lance_platform_remove();
1369 tc_unregister_driver(&dec_lance_tc_driver);
1370}
1371
1372
1373module_init(dec_lance_init);
1374module_exit(dec_lance_exit);