1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Lance ethernet driver for the MIPS processor based |
4 | * DECstation family |
5 | * |
6 | * |
7 | * adopted from sunlance.c by Richard van den Berg |
8 | * |
9 | * Copyright (C) 2002, 2003, 2005, 2006 Maciej W. Rozycki |
10 | * |
11 | * additional sources: |
12 | * - PMAD-AA TURBOchannel Ethernet Module Functional Specification, |
13 | * Revision 1.2 |
14 | * |
15 | * History: |
16 | * |
17 | * v0.001: The kernel accepts the code and it shows the hardware address. |
18 | * |
19 | * v0.002: Removed most sparc stuff, left only some module and dma stuff. |
20 | * |
21 | * v0.003: Enhanced base address calculation from proposals by |
22 | * Harald Koerfgen and Thomas Riemer. |
23 | * |
24 | * v0.004: lance-regs is pointing at the right addresses, added prom |
25 | * check. First start of address mapping and DMA. |
26 | * |
27 | * v0.005: started to play around with LANCE-DMA. This driver will not |
28 | * work for non IOASIC lances. HK |
29 | * |
30 | * v0.006: added pointer arrays to lance_private and setup routine for |
31 | * them in dec_lance_init. HK |
32 | * |
33 | * v0.007: Big shit. The LANCE seems to use a different DMA mechanism to |
34 | * access the init block. This looks like one (short) word at a |
35 | * time, but the smallest amount the IOASIC can transfer is a |
36 | * (long) word. So we have a 2-2 padding here. Changed |
37 | * lance_init_block accordingly. The 16-16 padding for the buffers |
38 | * seems to be correct. HK |
39 | * |
40 | * v0.008: mods to make PMAX_LANCE work. 01/09/1999 triemer |
41 | * |
42 | * v0.009: Module support fixes, multiple interfaces support, various |
43 | * bits. macro |
44 | * |
45 | * v0.010: Fixes for the PMAD mapping of the LANCE buffer and for the |
46 | * PMAX requirement to only use halfword accesses to the |
47 | * buffer. macro |
48 | * |
49 | * v0.011: Converted the PMAD to the driver model. macro |
50 | */ |
51 | |
52 | #include <linux/crc32.h> |
53 | #include <linux/delay.h> |
54 | #include <linux/errno.h> |
55 | #include <linux/if_ether.h> |
56 | #include <linux/init.h> |
57 | #include <linux/kernel.h> |
58 | #include <linux/module.h> |
59 | #include <linux/netdevice.h> |
60 | #include <linux/etherdevice.h> |
61 | #include <linux/spinlock.h> |
62 | #include <linux/stddef.h> |
63 | #include <linux/string.h> |
64 | #include <linux/tc.h> |
65 | #include <linux/types.h> |
66 | |
67 | #include <asm/addrspace.h> |
68 | |
69 | #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> |
74 | #include <asm/dec/system.h> |
75 | |
76 | static const char version[] = |
77 | "declance.c: v0.011 by Linux MIPS DECstation task force\n" ; |
78 | |
79 | MODULE_AUTHOR("Linux MIPS DECstation task force" ); |
80 | MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver" ); |
81 | MODULE_LICENSE("GPL" ); |
82 | |
83 | #define __unused __attribute__ ((unused)) |
84 | |
85 | /* |
86 | * card types |
87 | */ |
88 | #define ASIC_LANCE 1 |
89 | #define PMAD_LANCE 2 |
90 | #define PMAX_LANCE 3 |
91 | |
92 | |
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 */ |
122 | #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 */ |
131 | |
132 | /* 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 */ |
141 | |
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 | |
169 | /* |
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. |
173 | * |
174 | * The PMAD-AA has a 128 kB buffer on-board. |
175 | * |
176 | * 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 :-(. |
185 | */ |
186 | |
187 | struct lance_rx_desc { |
188 | unsigned short rmd0; /* low address of packet */ |
189 | unsigned short rmd1; /* high address of packet |
190 | and descriptor bits */ |
191 | short length; /* 2s complement (negative!) |
192 | of buffer length */ |
193 | unsigned short mblength; /* actual number of bytes received */ |
194 | }; |
195 | |
196 | struct lance_tx_desc { |
197 | unsigned short tmd0; /* low address of packet */ |
198 | unsigned short tmd1; /* high address of packet |
199 | and descriptor bits */ |
200 | short length; /* 2s complement (negative!) |
201 | of buffer length */ |
202 | unsigned short misc; |
203 | }; |
204 | |
205 | |
206 | /* First part of the LANCE initialization block, described in databook. */ |
207 | struct lance_init_block { |
208 | unsigned short mode; /* pre-set mode (reg. 15) */ |
209 | |
210 | unsigned short phys_addr[3]; /* physical ethernet address */ |
211 | unsigned short filter[4]; /* multicast filter */ |
212 | |
213 | /* Receive and transmit ring base, along with extra bits. */ |
214 | unsigned short rx_ptr; /* receive descriptor addr */ |
215 | unsigned short rx_len; /* receive len and high addr */ |
216 | unsigned short tx_ptr; /* transmit descriptor addr */ |
217 | unsigned short tx_len; /* transmit len and high addr */ |
218 | |
219 | short gap[4]; |
220 | |
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) |
227 | #define BUF_OFFSET_LNC sizeof(struct lance_init_block) |
228 | |
229 | #define shift_off(off, type) \ |
230 | (type == ASIC_LANCE || type == PMAX_LANCE ? off << 1 : off) |
231 | |
232 | #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))) |
249 | |
250 | struct lance_private { |
251 | struct net_device *next; |
252 | int type; |
253 | int dma_irq; |
254 | volatile struct lance_regs *ll; |
255 | |
256 | spinlock_t lock; |
257 | |
258 | int rx_new, tx_new; |
259 | int rx_old, tx_old; |
260 | |
261 | unsigned short busmaster_regval; |
262 | |
263 | struct timer_list multicast_timer; |
264 | struct net_device *dev; |
265 | |
266 | /* Pointers to the ring buffers as seen from the CPU */ |
267 | char *rx_buf_ptr_cpu[RX_RING_SIZE]; |
268 | char *tx_buf_ptr_cpu[TX_RING_SIZE]; |
269 | |
270 | /* Pointers to the ring buffers as seen from the LANCE */ |
271 | uint rx_buf_ptr_lnc[RX_RING_SIZE]; |
272 | uint tx_buf_ptr_lnc[TX_RING_SIZE]; |
273 | }; |
274 | |
275 | #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\ |
276 | lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\ |
277 | lp->tx_old - lp->tx_new-1) |
278 | |
279 | /* The lance control ports are at an absolute address, machine and tc-slot |
280 | * dependent. |
281 | * DECstations do only 32-bit access and the LANCE uses 16 bit addresses, |
282 | * so we have to give the structure an extra member making rap pointing |
283 | * at the right address |
284 | */ |
285 | struct lance_regs { |
286 | volatile unsigned short rdp; /* register data port */ |
287 | unsigned short pad; |
288 | volatile unsigned short rap; /* register address port */ |
289 | }; |
290 | |
291 | int dec_lance_debug = 2; |
292 | |
293 | static struct tc_driver dec_lance_tc_driver; |
294 | static struct net_device *root_lance_dev; |
295 | |
296 | static inline void writereg(volatile unsigned short *regptr, short value) |
297 | { |
298 | *regptr = value; |
299 | iob(); |
300 | } |
301 | |
302 | /* Load the CSR registers */ |
303 | static void load_csrs(struct lance_private *lp) |
304 | { |
305 | volatile struct lance_regs *ll = lp->ll; |
306 | uint leptr; |
307 | |
308 | /* The address space as seen from the LANCE |
309 | * begins at address 0. HK |
310 | */ |
311 | leptr = 0; |
312 | |
313 | writereg(regptr: &ll->rap, LE_CSR1); |
314 | writereg(regptr: &ll->rdp, value: (leptr & 0xFFFF)); |
315 | writereg(regptr: &ll->rap, LE_CSR2); |
316 | writereg(regptr: &ll->rdp, value: leptr >> 16); |
317 | writereg(regptr: &ll->rap, LE_CSR3); |
318 | writereg(regptr: &ll->rdp, value: lp->busmaster_regval); |
319 | |
320 | /* Point back to csr0 */ |
321 | writereg(regptr: &ll->rap, LE_CSR0); |
322 | } |
323 | |
324 | /* |
325 | * Our specialized copy routines |
326 | * |
327 | */ |
328 | static void cp_to_buf(const int type, void *to, const void *from, int len) |
329 | { |
330 | unsigned short *tp; |
331 | const unsigned short *fp; |
332 | unsigned short clen; |
333 | unsigned char *rtp; |
334 | const unsigned char *rfp; |
335 | |
336 | if (type == PMAD_LANCE) { |
337 | memcpy(to, from, len); |
338 | } else if (type == PMAX_LANCE) { |
339 | clen = len >> 1; |
340 | tp = to; |
341 | fp = from; |
342 | |
343 | while (clen--) { |
344 | *tp++ = *fp++; |
345 | tp++; |
346 | } |
347 | |
348 | clen = len & 1; |
349 | rtp = (unsigned char *)tp; |
350 | rfp = (const unsigned char *)fp; |
351 | while (clen--) { |
352 | *rtp++ = *rfp++; |
353 | } |
354 | } else { |
355 | /* |
356 | * copy 16 Byte chunks |
357 | */ |
358 | clen = len >> 4; |
359 | tp = to; |
360 | fp = from; |
361 | while (clen--) { |
362 | *tp++ = *fp++; |
363 | *tp++ = *fp++; |
364 | *tp++ = *fp++; |
365 | *tp++ = *fp++; |
366 | *tp++ = *fp++; |
367 | *tp++ = *fp++; |
368 | *tp++ = *fp++; |
369 | *tp++ = *fp++; |
370 | tp += 8; |
371 | } |
372 | |
373 | /* |
374 | * do the rest, if any. |
375 | */ |
376 | clen = len & 15; |
377 | rtp = (unsigned char *)tp; |
378 | rfp = (const unsigned char *)fp; |
379 | while (clen--) { |
380 | *rtp++ = *rfp++; |
381 | } |
382 | } |
383 | |
384 | iob(); |
385 | } |
386 | |
387 | static void cp_from_buf(const int type, void *to, const void *from, int len) |
388 | { |
389 | unsigned short *tp; |
390 | const unsigned short *fp; |
391 | unsigned short clen; |
392 | unsigned char *rtp; |
393 | const unsigned char *rfp; |
394 | |
395 | if (type == PMAD_LANCE) { |
396 | memcpy(to, from, len); |
397 | } else if (type == PMAX_LANCE) { |
398 | clen = len >> 1; |
399 | tp = to; |
400 | fp = from; |
401 | while (clen--) { |
402 | *tp++ = *fp++; |
403 | fp++; |
404 | } |
405 | |
406 | clen = len & 1; |
407 | |
408 | rtp = (unsigned char *)tp; |
409 | rfp = (const unsigned char *)fp; |
410 | |
411 | while (clen--) { |
412 | *rtp++ = *rfp++; |
413 | } |
414 | } else { |
415 | |
416 | /* |
417 | * copy 16 Byte chunks |
418 | */ |
419 | clen = len >> 4; |
420 | tp = to; |
421 | fp = from; |
422 | while (clen--) { |
423 | *tp++ = *fp++; |
424 | *tp++ = *fp++; |
425 | *tp++ = *fp++; |
426 | *tp++ = *fp++; |
427 | *tp++ = *fp++; |
428 | *tp++ = *fp++; |
429 | *tp++ = *fp++; |
430 | *tp++ = *fp++; |
431 | fp += 8; |
432 | } |
433 | |
434 | /* |
435 | * do the rest, if any. |
436 | */ |
437 | clen = len & 15; |
438 | rtp = (unsigned char *)tp; |
439 | rfp = (const unsigned char *)fp; |
440 | while (clen--) { |
441 | *rtp++ = *rfp++; |
442 | } |
443 | |
444 | |
445 | } |
446 | |
447 | } |
448 | |
449 | /* Setup the Lance Rx and Tx rings */ |
450 | static void lance_init_ring(struct net_device *dev) |
451 | { |
452 | struct lance_private *lp = netdev_priv(dev); |
453 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
454 | uint leptr; |
455 | int i; |
456 | |
457 | /* Lock out other processes while setting up hardware */ |
458 | netif_stop_queue(dev); |
459 | lp->rx_new = lp->tx_new = 0; |
460 | lp->rx_old = lp->tx_old = 0; |
461 | |
462 | /* Copy the ethernet address to the lance init block. |
463 | * XXX bit 0 of the physical address registers has to be zero |
464 | */ |
465 | *lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) | |
466 | dev->dev_addr[0]; |
467 | *lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) | |
468 | dev->dev_addr[2]; |
469 | *lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) | |
470 | dev->dev_addr[4]; |
471 | /* Setup the initialization block */ |
472 | |
473 | /* Setup rx descriptor pointer */ |
474 | leptr = offsetof(struct lance_init_block, brx_ring); |
475 | *lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) | |
476 | (leptr >> 16); |
477 | *lib_ptr(ib, rx_ptr, lp->type) = leptr; |
478 | if (ZERO) |
479 | printk("RX ptr: %8.8x(%8.8x)\n" , |
480 | leptr, (uint)lib_off(brx_ring, lp->type)); |
481 | |
482 | /* Setup tx descriptor pointer */ |
483 | leptr = offsetof(struct lance_init_block, btx_ring); |
484 | *lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) | |
485 | (leptr >> 16); |
486 | *lib_ptr(ib, tx_ptr, lp->type) = leptr; |
487 | if (ZERO) |
488 | printk("TX ptr: %8.8x(%8.8x)\n" , |
489 | leptr, (uint)lib_off(btx_ring, lp->type)); |
490 | |
491 | if (ZERO) |
492 | printk("TX rings:\n" ); |
493 | |
494 | /* Setup the Tx ring entries */ |
495 | for (i = 0; i < TX_RING_SIZE; i++) { |
496 | leptr = lp->tx_buf_ptr_lnc[i]; |
497 | *lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr; |
498 | *lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) & |
499 | 0xff; |
500 | *lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000; |
501 | /* The ones required by tmd2 */ |
502 | *lib_ptr(ib, btx_ring[i].misc, lp->type) = 0; |
503 | if (i < 3 && ZERO) |
504 | printk("%d: %8.8x(%p)\n" , |
505 | i, leptr, lp->tx_buf_ptr_cpu[i]); |
506 | } |
507 | |
508 | /* Setup the Rx ring entries */ |
509 | if (ZERO) |
510 | printk("RX rings:\n" ); |
511 | for (i = 0; i < RX_RING_SIZE; i++) { |
512 | leptr = lp->rx_buf_ptr_lnc[i]; |
513 | *lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr; |
514 | *lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) & |
515 | 0xff) | |
516 | LE_R1_OWN; |
517 | *lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE | |
518 | 0xf000; |
519 | *lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0; |
520 | if (i < 3 && ZERO) |
521 | printk("%d: %8.8x(%p)\n" , |
522 | i, leptr, lp->rx_buf_ptr_cpu[i]); |
523 | } |
524 | iob(); |
525 | } |
526 | |
527 | static int init_restart_lance(struct lance_private *lp) |
528 | { |
529 | volatile struct lance_regs *ll = lp->ll; |
530 | int i; |
531 | |
532 | writereg(regptr: &ll->rap, LE_CSR0); |
533 | writereg(regptr: &ll->rdp, LE_C0_INIT); |
534 | |
535 | /* Wait for the lance to complete initialization */ |
536 | for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) { |
537 | udelay(10); |
538 | } |
539 | if ((i == 100) || (ll->rdp & LE_C0_ERR)) { |
540 | printk("LANCE unopened after %d ticks, csr0=%4.4x.\n" , |
541 | i, ll->rdp); |
542 | return -1; |
543 | } |
544 | if ((ll->rdp & LE_C0_ERR)) { |
545 | printk("LANCE unopened after %d ticks, csr0=%4.4x.\n" , |
546 | i, ll->rdp); |
547 | return -1; |
548 | } |
549 | writereg(regptr: &ll->rdp, LE_C0_IDON); |
550 | writereg(regptr: &ll->rdp, LE_C0_STRT); |
551 | writereg(regptr: &ll->rdp, LE_C0_INEA); |
552 | |
553 | return 0; |
554 | } |
555 | |
556 | static int lance_rx(struct net_device *dev) |
557 | { |
558 | struct lance_private *lp = netdev_priv(dev); |
559 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
560 | volatile u16 *rd; |
561 | unsigned short bits; |
562 | int entry, len; |
563 | struct sk_buff *skb; |
564 | |
565 | #ifdef TEST_HITS |
566 | { |
567 | int i; |
568 | |
569 | printk("[" ); |
570 | for (i = 0; i < RX_RING_SIZE; i++) { |
571 | if (i == lp->rx_new) |
572 | printk("%s" , *lib_ptr(ib, brx_ring[i].rmd1, |
573 | lp->type) & |
574 | LE_R1_OWN ? "_" : "X" ); |
575 | else |
576 | printk("%s" , *lib_ptr(ib, brx_ring[i].rmd1, |
577 | lp->type) & |
578 | LE_R1_OWN ? "." : "1" ); |
579 | } |
580 | printk("]" ); |
581 | } |
582 | #endif |
583 | |
584 | for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type); |
585 | !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN); |
586 | rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) { |
587 | entry = lp->rx_new; |
588 | |
589 | /* We got an incomplete frame? */ |
590 | if ((bits & LE_R1_POK) != LE_R1_POK) { |
591 | dev->stats.rx_over_errors++; |
592 | dev->stats.rx_errors++; |
593 | } else if (bits & LE_R1_ERR) { |
594 | /* Count only the end frame as a rx error, |
595 | * not the beginning |
596 | */ |
597 | if (bits & LE_R1_BUF) |
598 | dev->stats.rx_fifo_errors++; |
599 | if (bits & LE_R1_CRC) |
600 | dev->stats.rx_crc_errors++; |
601 | if (bits & LE_R1_OFL) |
602 | dev->stats.rx_over_errors++; |
603 | if (bits & LE_R1_FRA) |
604 | dev->stats.rx_frame_errors++; |
605 | if (bits & LE_R1_EOP) |
606 | dev->stats.rx_errors++; |
607 | } else { |
608 | len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4; |
609 | skb = netdev_alloc_skb(dev, length: len + 2); |
610 | |
611 | if (!skb) { |
612 | dev->stats.rx_dropped++; |
613 | *rds_ptr(rd, mblength, lp->type) = 0; |
614 | *rds_ptr(rd, rmd1, lp->type) = |
615 | ((lp->rx_buf_ptr_lnc[entry] >> 16) & |
616 | 0xff) | LE_R1_OWN; |
617 | lp->rx_new = (entry + 1) & RX_RING_MOD_MASK; |
618 | return 0; |
619 | } |
620 | dev->stats.rx_bytes += len; |
621 | |
622 | skb_reserve(skb, len: 2); /* 16 byte align */ |
623 | skb_put(skb, len); /* make room */ |
624 | |
625 | cp_from_buf(type: lp->type, to: skb->data, |
626 | from: lp->rx_buf_ptr_cpu[entry], len); |
627 | |
628 | skb->protocol = eth_type_trans(skb, dev); |
629 | netif_rx(skb); |
630 | dev->stats.rx_packets++; |
631 | } |
632 | |
633 | /* Return the packet to the pool */ |
634 | *rds_ptr(rd, mblength, lp->type) = 0; |
635 | *rds_ptr(rd, length, lp->type) = -RX_BUFF_SIZE | 0xf000; |
636 | *rds_ptr(rd, rmd1, lp->type) = |
637 | ((lp->rx_buf_ptr_lnc[entry] >> 16) & 0xff) | LE_R1_OWN; |
638 | lp->rx_new = (entry + 1) & RX_RING_MOD_MASK; |
639 | } |
640 | return 0; |
641 | } |
642 | |
643 | static void lance_tx(struct net_device *dev) |
644 | { |
645 | struct lance_private *lp = netdev_priv(dev); |
646 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
647 | volatile struct lance_regs *ll = lp->ll; |
648 | volatile u16 *td; |
649 | int i, j; |
650 | int status; |
651 | |
652 | j = lp->tx_old; |
653 | |
654 | spin_lock(lock: &lp->lock); |
655 | |
656 | for (i = j; i != lp->tx_new; i = j) { |
657 | td = lib_ptr(ib, btx_ring[i], lp->type); |
658 | /* If we hit a packet not owned by us, stop */ |
659 | if (*tds_ptr(td, tmd1, lp->type) & LE_T1_OWN) |
660 | break; |
661 | |
662 | if (*tds_ptr(td, tmd1, lp->type) & LE_T1_ERR) { |
663 | status = *tds_ptr(td, misc, lp->type); |
664 | |
665 | dev->stats.tx_errors++; |
666 | if (status & LE_T3_RTY) |
667 | dev->stats.tx_aborted_errors++; |
668 | if (status & LE_T3_LCOL) |
669 | dev->stats.tx_window_errors++; |
670 | |
671 | if (status & LE_T3_CLOS) { |
672 | dev->stats.tx_carrier_errors++; |
673 | printk("%s: Carrier Lost\n" , dev->name); |
674 | /* Stop the lance */ |
675 | writereg(regptr: &ll->rap, LE_CSR0); |
676 | writereg(regptr: &ll->rdp, LE_C0_STOP); |
677 | lance_init_ring(dev); |
678 | load_csrs(lp); |
679 | init_restart_lance(lp); |
680 | goto out; |
681 | } |
682 | /* Buffer errors and underflows turn off the |
683 | * transmitter, restart the adapter. |
684 | */ |
685 | if (status & (LE_T3_BUF | LE_T3_UFL)) { |
686 | dev->stats.tx_fifo_errors++; |
687 | |
688 | printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n" , |
689 | dev->name); |
690 | /* Stop the lance */ |
691 | writereg(regptr: &ll->rap, LE_CSR0); |
692 | writereg(regptr: &ll->rdp, LE_C0_STOP); |
693 | lance_init_ring(dev); |
694 | load_csrs(lp); |
695 | init_restart_lance(lp); |
696 | goto out; |
697 | } |
698 | } else if ((*tds_ptr(td, tmd1, lp->type) & LE_T1_POK) == |
699 | LE_T1_POK) { |
700 | /* |
701 | * So we don't count the packet more than once. |
702 | */ |
703 | *tds_ptr(td, tmd1, lp->type) &= ~(LE_T1_POK); |
704 | |
705 | /* One collision before packet was sent. */ |
706 | if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EONE) |
707 | dev->stats.collisions++; |
708 | |
709 | /* More than one collision, be optimistic. */ |
710 | if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE) |
711 | dev->stats.collisions += 2; |
712 | |
713 | dev->stats.tx_packets++; |
714 | } |
715 | j = (j + 1) & TX_RING_MOD_MASK; |
716 | } |
717 | lp->tx_old = j; |
718 | out: |
719 | if (netif_queue_stopped(dev) && |
720 | TX_BUFFS_AVAIL > 0) |
721 | netif_wake_queue(dev); |
722 | |
723 | spin_unlock(lock: &lp->lock); |
724 | } |
725 | |
726 | static irqreturn_t lance_dma_merr_int(int irq, void *dev_id) |
727 | { |
728 | struct net_device *dev = dev_id; |
729 | |
730 | printk(KERN_ERR "%s: DMA error\n" , dev->name); |
731 | return IRQ_HANDLED; |
732 | } |
733 | |
734 | static irqreturn_t lance_interrupt(int irq, void *dev_id) |
735 | { |
736 | struct net_device *dev = dev_id; |
737 | struct lance_private *lp = netdev_priv(dev); |
738 | volatile struct lance_regs *ll = lp->ll; |
739 | int csr0; |
740 | |
741 | writereg(regptr: &ll->rap, LE_CSR0); |
742 | csr0 = ll->rdp; |
743 | |
744 | /* Acknowledge all the interrupt sources ASAP */ |
745 | writereg(regptr: &ll->rdp, value: csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT)); |
746 | |
747 | if ((csr0 & LE_C0_ERR)) { |
748 | /* Clear the error condition */ |
749 | writereg(regptr: &ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS | |
750 | LE_C0_CERR | LE_C0_MERR); |
751 | } |
752 | if (csr0 & LE_C0_RINT) |
753 | lance_rx(dev); |
754 | |
755 | if (csr0 & LE_C0_TINT) |
756 | lance_tx(dev); |
757 | |
758 | if (csr0 & LE_C0_BABL) |
759 | dev->stats.tx_errors++; |
760 | |
761 | if (csr0 & LE_C0_MISS) |
762 | dev->stats.rx_errors++; |
763 | |
764 | if (csr0 & LE_C0_MERR) { |
765 | printk("%s: Memory error, status %04x\n" , dev->name, csr0); |
766 | |
767 | writereg(regptr: &ll->rdp, LE_C0_STOP); |
768 | |
769 | lance_init_ring(dev); |
770 | load_csrs(lp); |
771 | init_restart_lance(lp); |
772 | netif_wake_queue(dev); |
773 | } |
774 | |
775 | writereg(regptr: &ll->rdp, LE_C0_INEA); |
776 | writereg(regptr: &ll->rdp, LE_C0_INEA); |
777 | return IRQ_HANDLED; |
778 | } |
779 | |
780 | static int lance_open(struct net_device *dev) |
781 | { |
782 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
783 | struct lance_private *lp = netdev_priv(dev); |
784 | volatile struct lance_regs *ll = lp->ll; |
785 | int status = 0; |
786 | |
787 | /* Stop the Lance */ |
788 | writereg(regptr: &ll->rap, LE_CSR0); |
789 | writereg(regptr: &ll->rdp, LE_C0_STOP); |
790 | |
791 | /* Set mode and clear multicast filter only at device open, |
792 | * so that lance_init_ring() called at any error will not |
793 | * forget multicast filters. |
794 | * |
795 | * BTW it is common bug in all lance drivers! --ANK |
796 | */ |
797 | *lib_ptr(ib, mode, lp->type) = 0; |
798 | *lib_ptr(ib, filter[0], lp->type) = 0; |
799 | *lib_ptr(ib, filter[1], lp->type) = 0; |
800 | *lib_ptr(ib, filter[2], lp->type) = 0; |
801 | *lib_ptr(ib, filter[3], lp->type) = 0; |
802 | |
803 | lance_init_ring(dev); |
804 | load_csrs(lp); |
805 | |
806 | netif_start_queue(dev); |
807 | |
808 | /* Associate IRQ with lance_interrupt */ |
809 | if (request_irq(irq: dev->irq, handler: lance_interrupt, flags: 0, name: "lance" , dev)) { |
810 | printk("%s: Can't get IRQ %d\n" , dev->name, dev->irq); |
811 | return -EAGAIN; |
812 | } |
813 | if (lp->dma_irq >= 0) { |
814 | unsigned long flags; |
815 | |
816 | if (request_irq(irq: lp->dma_irq, handler: lance_dma_merr_int, IRQF_ONESHOT, |
817 | name: "lance error" , dev)) { |
818 | free_irq(dev->irq, dev); |
819 | printk("%s: Can't get DMA IRQ %d\n" , dev->name, |
820 | lp->dma_irq); |
821 | return -EAGAIN; |
822 | } |
823 | |
824 | spin_lock_irqsave(&ioasic_ssr_lock, flags); |
825 | |
826 | fast_mb(); |
827 | /* Enable I/O ASIC LANCE DMA. */ |
828 | ioasic_write(IO_REG_SSR, |
829 | ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN); |
830 | |
831 | fast_mb(); |
832 | spin_unlock_irqrestore(lock: &ioasic_ssr_lock, flags); |
833 | } |
834 | |
835 | status = init_restart_lance(lp); |
836 | return status; |
837 | } |
838 | |
839 | static int lance_close(struct net_device *dev) |
840 | { |
841 | struct lance_private *lp = netdev_priv(dev); |
842 | volatile struct lance_regs *ll = lp->ll; |
843 | |
844 | netif_stop_queue(dev); |
845 | del_timer_sync(timer: &lp->multicast_timer); |
846 | |
847 | /* Stop the card */ |
848 | writereg(regptr: &ll->rap, LE_CSR0); |
849 | writereg(regptr: &ll->rdp, LE_C0_STOP); |
850 | |
851 | if (lp->dma_irq >= 0) { |
852 | unsigned long flags; |
853 | |
854 | spin_lock_irqsave(&ioasic_ssr_lock, flags); |
855 | |
856 | fast_mb(); |
857 | /* Disable I/O ASIC LANCE DMA. */ |
858 | ioasic_write(IO_REG_SSR, |
859 | ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN); |
860 | |
861 | fast_iob(); |
862 | spin_unlock_irqrestore(lock: &ioasic_ssr_lock, flags); |
863 | |
864 | free_irq(lp->dma_irq, dev); |
865 | } |
866 | free_irq(dev->irq, dev); |
867 | return 0; |
868 | } |
869 | |
870 | static inline int lance_reset(struct net_device *dev) |
871 | { |
872 | struct lance_private *lp = netdev_priv(dev); |
873 | volatile struct lance_regs *ll = lp->ll; |
874 | int status; |
875 | |
876 | /* Stop the lance */ |
877 | writereg(regptr: &ll->rap, LE_CSR0); |
878 | writereg(regptr: &ll->rdp, LE_C0_STOP); |
879 | |
880 | lance_init_ring(dev); |
881 | load_csrs(lp); |
882 | netif_trans_update(dev); /* prevent tx timeout */ |
883 | status = init_restart_lance(lp); |
884 | return status; |
885 | } |
886 | |
887 | static void lance_tx_timeout(struct net_device *dev, unsigned int txqueue) |
888 | { |
889 | struct lance_private *lp = netdev_priv(dev); |
890 | volatile struct lance_regs *ll = lp->ll; |
891 | |
892 | printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n" , |
893 | dev->name, ll->rdp); |
894 | lance_reset(dev); |
895 | netif_wake_queue(dev); |
896 | } |
897 | |
898 | static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev) |
899 | { |
900 | struct lance_private *lp = netdev_priv(dev); |
901 | volatile struct lance_regs *ll = lp->ll; |
902 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
903 | unsigned long flags; |
904 | int entry, len; |
905 | |
906 | len = skb->len; |
907 | |
908 | if (len < ETH_ZLEN) { |
909 | if (skb_padto(skb, ETH_ZLEN)) |
910 | return NETDEV_TX_OK; |
911 | len = ETH_ZLEN; |
912 | } |
913 | |
914 | dev->stats.tx_bytes += len; |
915 | |
916 | spin_lock_irqsave(&lp->lock, flags); |
917 | |
918 | entry = lp->tx_new; |
919 | *lib_ptr(ib, btx_ring[entry].length, lp->type) = (-len); |
920 | *lib_ptr(ib, btx_ring[entry].misc, lp->type) = 0; |
921 | |
922 | cp_to_buf(type: lp->type, to: lp->tx_buf_ptr_cpu[entry], from: skb->data, len); |
923 | |
924 | /* Now, give the packet to the lance */ |
925 | *lib_ptr(ib, btx_ring[entry].tmd1, lp->type) = |
926 | ((lp->tx_buf_ptr_lnc[entry] >> 16) & 0xff) | |
927 | (LE_T1_POK | LE_T1_OWN); |
928 | lp->tx_new = (entry + 1) & TX_RING_MOD_MASK; |
929 | |
930 | if (TX_BUFFS_AVAIL <= 0) |
931 | netif_stop_queue(dev); |
932 | |
933 | /* Kick the lance: transmit now */ |
934 | writereg(regptr: &ll->rdp, LE_C0_INEA | LE_C0_TDMD); |
935 | |
936 | spin_unlock_irqrestore(lock: &lp->lock, flags); |
937 | |
938 | dev_kfree_skb(skb); |
939 | |
940 | return NETDEV_TX_OK; |
941 | } |
942 | |
943 | static void lance_load_multicast(struct net_device *dev) |
944 | { |
945 | struct lance_private *lp = netdev_priv(dev); |
946 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
947 | struct netdev_hw_addr *ha; |
948 | u32 crc; |
949 | |
950 | /* set all multicast bits */ |
951 | if (dev->flags & IFF_ALLMULTI) { |
952 | *lib_ptr(ib, filter[0], lp->type) = 0xffff; |
953 | *lib_ptr(ib, filter[1], lp->type) = 0xffff; |
954 | *lib_ptr(ib, filter[2], lp->type) = 0xffff; |
955 | *lib_ptr(ib, filter[3], lp->type) = 0xffff; |
956 | return; |
957 | } |
958 | /* clear the multicast filter */ |
959 | *lib_ptr(ib, filter[0], lp->type) = 0; |
960 | *lib_ptr(ib, filter[1], lp->type) = 0; |
961 | *lib_ptr(ib, filter[2], lp->type) = 0; |
962 | *lib_ptr(ib, filter[3], lp->type) = 0; |
963 | |
964 | /* Add addresses */ |
965 | netdev_for_each_mc_addr(ha, dev) { |
966 | crc = ether_crc_le(ETH_ALEN, ha->addr); |
967 | crc = crc >> 26; |
968 | *lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf); |
969 | } |
970 | } |
971 | |
972 | static void lance_set_multicast(struct net_device *dev) |
973 | { |
974 | struct lance_private *lp = netdev_priv(dev); |
975 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
976 | volatile struct lance_regs *ll = lp->ll; |
977 | |
978 | if (!netif_running(dev)) |
979 | return; |
980 | |
981 | if (lp->tx_old != lp->tx_new) { |
982 | mod_timer(timer: &lp->multicast_timer, expires: jiffies + 4 * HZ/100); |
983 | netif_wake_queue(dev); |
984 | return; |
985 | } |
986 | |
987 | netif_stop_queue(dev); |
988 | |
989 | writereg(regptr: &ll->rap, LE_CSR0); |
990 | writereg(regptr: &ll->rdp, LE_C0_STOP); |
991 | |
992 | lance_init_ring(dev); |
993 | |
994 | if (dev->flags & IFF_PROMISC) { |
995 | *lib_ptr(ib, mode, lp->type) |= LE_MO_PROM; |
996 | } else { |
997 | *lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM; |
998 | lance_load_multicast(dev); |
999 | } |
1000 | load_csrs(lp); |
1001 | init_restart_lance(lp); |
1002 | netif_wake_queue(dev); |
1003 | } |
1004 | |
1005 | static void lance_set_multicast_retry(struct timer_list *t) |
1006 | { |
1007 | struct lance_private *lp = from_timer(lp, t, multicast_timer); |
1008 | struct net_device *dev = lp->dev; |
1009 | |
1010 | lance_set_multicast(dev); |
1011 | } |
1012 | |
1013 | static const struct net_device_ops lance_netdev_ops = { |
1014 | .ndo_open = lance_open, |
1015 | .ndo_stop = lance_close, |
1016 | .ndo_start_xmit = lance_start_xmit, |
1017 | .ndo_tx_timeout = lance_tx_timeout, |
1018 | .ndo_set_rx_mode = lance_set_multicast, |
1019 | .ndo_validate_addr = eth_validate_addr, |
1020 | .ndo_set_mac_address = eth_mac_addr, |
1021 | }; |
1022 | |
1023 | static int dec_lance_probe(struct device *bdev, const int type) |
1024 | { |
1025 | static unsigned version_printed; |
1026 | static const char fmt[] = "declance%d" ; |
1027 | char name[10]; |
1028 | struct net_device *dev; |
1029 | struct lance_private *lp; |
1030 | volatile struct lance_regs *ll; |
1031 | resource_size_t start = 0, len = 0; |
1032 | int i, ret; |
1033 | unsigned long esar_base; |
1034 | unsigned char *esar; |
1035 | u8 addr[ETH_ALEN]; |
1036 | const char *desc; |
1037 | |
1038 | if (dec_lance_debug && version_printed++ == 0) |
1039 | printk(version); |
1040 | |
1041 | if (bdev) |
1042 | snprintf(buf: name, size: sizeof(name), fmt: "%s" , dev_name(dev: bdev)); |
1043 | else { |
1044 | i = 0; |
1045 | dev = root_lance_dev; |
1046 | while (dev) { |
1047 | i++; |
1048 | lp = netdev_priv(dev); |
1049 | dev = lp->next; |
1050 | } |
1051 | snprintf(buf: name, size: sizeof(name), fmt, i); |
1052 | } |
1053 | |
1054 | dev = alloc_etherdev(sizeof(struct lance_private)); |
1055 | if (!dev) { |
1056 | ret = -ENOMEM; |
1057 | goto err_out; |
1058 | } |
1059 | |
1060 | /* |
1061 | * alloc_etherdev ensures the data structures used by the LANCE |
1062 | * are aligned. |
1063 | */ |
1064 | lp = netdev_priv(dev); |
1065 | spin_lock_init(&lp->lock); |
1066 | |
1067 | lp->type = type; |
1068 | switch (type) { |
1069 | case ASIC_LANCE: |
1070 | dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE); |
1071 | |
1072 | /* buffer space for the on-board LANCE shared memory */ |
1073 | /* |
1074 | * FIXME: ugly hack! |
1075 | */ |
1076 | dev->mem_start = CKSEG1ADDR(0x00020000); |
1077 | dev->mem_end = dev->mem_start + 0x00020000; |
1078 | dev->irq = dec_interrupt[DEC_IRQ_LANCE]; |
1079 | esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR); |
1080 | |
1081 | /* Workaround crash with booting KN04 2.1k from Disk */ |
1082 | memset((void *)dev->mem_start, 0, |
1083 | dev->mem_end - dev->mem_start); |
1084 | |
1085 | /* |
1086 | * setup the pointer arrays, this sucks [tm] :-( |
1087 | */ |
1088 | for (i = 0; i < RX_RING_SIZE; i++) { |
1089 | lp->rx_buf_ptr_cpu[i] = |
1090 | (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU + |
1091 | 2 * i * RX_BUFF_SIZE); |
1092 | lp->rx_buf_ptr_lnc[i] = |
1093 | (BUF_OFFSET_LNC + i * RX_BUFF_SIZE); |
1094 | } |
1095 | for (i = 0; i < TX_RING_SIZE; i++) { |
1096 | lp->tx_buf_ptr_cpu[i] = |
1097 | (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU + |
1098 | 2 * RX_RING_SIZE * RX_BUFF_SIZE + |
1099 | 2 * i * TX_BUFF_SIZE); |
1100 | lp->tx_buf_ptr_lnc[i] = |
1101 | (BUF_OFFSET_LNC + |
1102 | RX_RING_SIZE * RX_BUFF_SIZE + |
1103 | i * TX_BUFF_SIZE); |
1104 | } |
1105 | |
1106 | /* Setup I/O ASIC LANCE DMA. */ |
1107 | lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR]; |
1108 | ioasic_write(IO_REG_LANCE_DMA_P, |
1109 | CPHYSADDR(dev->mem_start) << 3); |
1110 | |
1111 | break; |
1112 | #ifdef CONFIG_TC |
1113 | case PMAD_LANCE: |
1114 | dev_set_drvdata(bdev, dev); |
1115 | |
1116 | start = to_tc_dev(bdev)->resource.start; |
1117 | len = to_tc_dev(bdev)->resource.end - start + 1; |
1118 | if (!request_mem_region(start, len, dev_name(bdev))) { |
1119 | printk(KERN_ERR |
1120 | "%s: Unable to reserve MMIO resource\n" , |
1121 | dev_name(bdev)); |
1122 | ret = -EBUSY; |
1123 | goto err_out_dev; |
1124 | } |
1125 | |
1126 | dev->mem_start = CKSEG1ADDR(start); |
1127 | dev->mem_end = dev->mem_start + 0x100000; |
1128 | dev->base_addr = dev->mem_start + 0x100000; |
1129 | dev->irq = to_tc_dev(bdev)->interrupt; |
1130 | esar_base = dev->mem_start + 0x1c0002; |
1131 | lp->dma_irq = -1; |
1132 | |
1133 | for (i = 0; i < RX_RING_SIZE; i++) { |
1134 | lp->rx_buf_ptr_cpu[i] = |
1135 | (char *)(dev->mem_start + BUF_OFFSET_CPU + |
1136 | i * RX_BUFF_SIZE); |
1137 | lp->rx_buf_ptr_lnc[i] = |
1138 | (BUF_OFFSET_LNC + i * RX_BUFF_SIZE); |
1139 | } |
1140 | for (i = 0; i < TX_RING_SIZE; i++) { |
1141 | lp->tx_buf_ptr_cpu[i] = |
1142 | (char *)(dev->mem_start + BUF_OFFSET_CPU + |
1143 | RX_RING_SIZE * RX_BUFF_SIZE + |
1144 | i * TX_BUFF_SIZE); |
1145 | lp->tx_buf_ptr_lnc[i] = |
1146 | (BUF_OFFSET_LNC + |
1147 | RX_RING_SIZE * RX_BUFF_SIZE + |
1148 | i * TX_BUFF_SIZE); |
1149 | } |
1150 | |
1151 | break; |
1152 | #endif |
1153 | case PMAX_LANCE: |
1154 | dev->irq = dec_interrupt[DEC_IRQ_LANCE]; |
1155 | dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE); |
1156 | dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM); |
1157 | dev->mem_end = dev->mem_start + KN01_SLOT_SIZE; |
1158 | esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1); |
1159 | lp->dma_irq = -1; |
1160 | |
1161 | /* |
1162 | * setup the pointer arrays, this sucks [tm] :-( |
1163 | */ |
1164 | for (i = 0; i < RX_RING_SIZE; i++) { |
1165 | lp->rx_buf_ptr_cpu[i] = |
1166 | (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU + |
1167 | 2 * i * RX_BUFF_SIZE); |
1168 | lp->rx_buf_ptr_lnc[i] = |
1169 | (BUF_OFFSET_LNC + i * RX_BUFF_SIZE); |
1170 | } |
1171 | for (i = 0; i < TX_RING_SIZE; i++) { |
1172 | lp->tx_buf_ptr_cpu[i] = |
1173 | (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU + |
1174 | 2 * RX_RING_SIZE * RX_BUFF_SIZE + |
1175 | 2 * i * TX_BUFF_SIZE); |
1176 | lp->tx_buf_ptr_lnc[i] = |
1177 | (BUF_OFFSET_LNC + |
1178 | RX_RING_SIZE * RX_BUFF_SIZE + |
1179 | i * TX_BUFF_SIZE); |
1180 | } |
1181 | |
1182 | break; |
1183 | |
1184 | default: |
1185 | printk(KERN_ERR "%s: declance_init called with unknown type\n" , |
1186 | name); |
1187 | ret = -ENODEV; |
1188 | goto err_out_dev; |
1189 | } |
1190 | |
1191 | ll = (struct lance_regs *) dev->base_addr; |
1192 | esar = (unsigned char *) esar_base; |
1193 | |
1194 | /* prom checks */ |
1195 | /* First, check for test pattern */ |
1196 | if (esar[0x60] != 0xff && esar[0x64] != 0x00 && |
1197 | esar[0x68] != 0x55 && esar[0x6c] != 0xaa) { |
1198 | printk(KERN_ERR |
1199 | "%s: Ethernet station address prom not found!\n" , |
1200 | name); |
1201 | ret = -ENODEV; |
1202 | goto err_out_resource; |
1203 | } |
1204 | /* Check the prom contents */ |
1205 | for (i = 0; i < 8; i++) { |
1206 | if (esar[i * 4] != esar[0x3c - i * 4] && |
1207 | esar[i * 4] != esar[0x40 + i * 4] && |
1208 | esar[0x3c - i * 4] != esar[0x40 + i * 4]) { |
1209 | printk(KERN_ERR "%s: Something is wrong with the " |
1210 | "ethernet station address prom!\n" , name); |
1211 | ret = -ENODEV; |
1212 | goto err_out_resource; |
1213 | } |
1214 | } |
1215 | |
1216 | /* Copy the ethernet address to the device structure, later to the |
1217 | * lance initialization block so the lance gets it every time it's |
1218 | * (re)initialized. |
1219 | */ |
1220 | switch (type) { |
1221 | case ASIC_LANCE: |
1222 | desc = "IOASIC onboard LANCE" ; |
1223 | break; |
1224 | case PMAD_LANCE: |
1225 | desc = "PMAD-AA" ; |
1226 | break; |
1227 | case PMAX_LANCE: |
1228 | desc = "PMAX onboard LANCE" ; |
1229 | break; |
1230 | } |
1231 | for (i = 0; i < 6; i++) |
1232 | addr[i] = esar[i * 4]; |
1233 | eth_hw_addr_set(dev, addr); |
1234 | |
1235 | printk("%s: %s, addr = %pM, irq = %d\n" , |
1236 | name, desc, dev->dev_addr, dev->irq); |
1237 | |
1238 | dev->netdev_ops = &lance_netdev_ops; |
1239 | dev->watchdog_timeo = 5*HZ; |
1240 | |
1241 | /* lp->ll is the location of the registers for lance card */ |
1242 | lp->ll = ll; |
1243 | |
1244 | /* busmaster_regval (CSR3) should be zero according to the PMAD-AA |
1245 | * specification. |
1246 | */ |
1247 | lp->busmaster_regval = 0; |
1248 | |
1249 | dev->dma = 0; |
1250 | |
1251 | /* We cannot sleep if the chip is busy during a |
1252 | * multicast list update event, because such events |
1253 | * can occur from interrupts (ex. IPv6). So we |
1254 | * use a timer to try again later when necessary. -DaveM |
1255 | */ |
1256 | lp->dev = dev; |
1257 | timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0); |
1258 | |
1259 | |
1260 | ret = register_netdev(dev); |
1261 | if (ret) { |
1262 | printk(KERN_ERR |
1263 | "%s: Unable to register netdev, aborting.\n" , name); |
1264 | goto err_out_resource; |
1265 | } |
1266 | |
1267 | if (!bdev) { |
1268 | lp->next = root_lance_dev; |
1269 | root_lance_dev = dev; |
1270 | } |
1271 | |
1272 | printk("%s: registered as %s.\n" , name, dev->name); |
1273 | return 0; |
1274 | |
1275 | err_out_resource: |
1276 | if (bdev) |
1277 | release_mem_region(start, len); |
1278 | |
1279 | err_out_dev: |
1280 | free_netdev(dev); |
1281 | |
1282 | err_out: |
1283 | return ret; |
1284 | } |
1285 | |
1286 | /* Find all the lance cards on the system and initialize them */ |
1287 | static int __init dec_lance_platform_probe(void) |
1288 | { |
1289 | int count = 0; |
1290 | |
1291 | if (dec_interrupt[DEC_IRQ_LANCE] >= 0) { |
1292 | if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) { |
1293 | if (dec_lance_probe(NULL, ASIC_LANCE) >= 0) |
1294 | count++; |
1295 | } else if (!TURBOCHANNEL) { |
1296 | if (dec_lance_probe(NULL, PMAX_LANCE) >= 0) |
1297 | count++; |
1298 | } |
1299 | } |
1300 | |
1301 | return (count > 0) ? 0 : -ENODEV; |
1302 | } |
1303 | |
1304 | static void __exit dec_lance_platform_remove(void) |
1305 | { |
1306 | while (root_lance_dev) { |
1307 | struct net_device *dev = root_lance_dev; |
1308 | struct lance_private *lp = netdev_priv(dev); |
1309 | |
1310 | unregister_netdev(dev); |
1311 | root_lance_dev = lp->next; |
1312 | free_netdev(dev); |
1313 | } |
1314 | } |
1315 | |
1316 | #ifdef CONFIG_TC |
1317 | static int dec_lance_tc_probe(struct device *dev); |
1318 | static int dec_lance_tc_remove(struct device *dev); |
1319 | |
1320 | static const struct tc_device_id dec_lance_tc_table[] = { |
1321 | { "DEC " , "PMAD-AA " }, |
1322 | { } |
1323 | }; |
1324 | MODULE_DEVICE_TABLE(tc, dec_lance_tc_table); |
1325 | |
1326 | static struct tc_driver dec_lance_tc_driver = { |
1327 | .id_table = dec_lance_tc_table, |
1328 | .driver = { |
1329 | .name = "declance" , |
1330 | .bus = &tc_bus_type, |
1331 | .probe = dec_lance_tc_probe, |
1332 | .remove = dec_lance_tc_remove, |
1333 | }, |
1334 | }; |
1335 | |
1336 | static int dec_lance_tc_probe(struct device *dev) |
1337 | { |
1338 | int status = dec_lance_probe(dev, PMAD_LANCE); |
1339 | if (!status) |
1340 | get_device(dev); |
1341 | return status; |
1342 | } |
1343 | |
1344 | static void dec_lance_remove(struct device *bdev) |
1345 | { |
1346 | struct net_device *dev = dev_get_drvdata(bdev); |
1347 | resource_size_t start, len; |
1348 | |
1349 | unregister_netdev(dev); |
1350 | start = to_tc_dev(bdev)->resource.start; |
1351 | len = to_tc_dev(bdev)->resource.end - start + 1; |
1352 | release_mem_region(start, len); |
1353 | free_netdev(dev); |
1354 | } |
1355 | |
1356 | static int dec_lance_tc_remove(struct device *dev) |
1357 | { |
1358 | put_device(dev); |
1359 | dec_lance_remove(dev); |
1360 | return 0; |
1361 | } |
1362 | #endif |
1363 | |
1364 | static int __init dec_lance_init(void) |
1365 | { |
1366 | int status; |
1367 | |
1368 | status = tc_register_driver(tdrv: &dec_lance_tc_driver); |
1369 | if (!status) |
1370 | dec_lance_platform_probe(); |
1371 | return status; |
1372 | } |
1373 | |
1374 | static void __exit dec_lance_exit(void) |
1375 | { |
1376 | dec_lance_platform_remove(); |
1377 | tc_unregister_driver(tdrv: &dec_lance_tc_driver); |
1378 | } |
1379 | |
1380 | |
1381 | module_init(dec_lance_init); |
1382 | module_exit(dec_lance_exit); |
1383 | |