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1da177e4 LT |
1 | /*------------------------------------------------------------------------ |
2 | . smc9194.c | |
3 | . This is a driver for SMC's 9000 series of Ethernet cards. | |
4 | . | |
5 | . Copyright (C) 1996 by Erik Stahlman | |
6 | . This software may be used and distributed according to the terms | |
7 | . of the GNU General Public License, incorporated herein by reference. | |
8 | . | |
9 | . "Features" of the SMC chip: | |
10 | . 4608 byte packet memory. ( for the 91C92. Others have more ) | |
11 | . EEPROM for configuration | |
12 | . AUI/TP selection ( mine has 10Base2/10BaseT select ) | |
13 | . | |
14 | . Arguments: | |
15 | . io = for the base address | |
16 | . irq = for the IRQ | |
17 | . ifport = 0 for autodetect, 1 for TP, 2 for AUI ( or 10base2 ) | |
18 | . | |
19 | . author: | |
20 | . Erik Stahlman ( erik@vt.edu ) | |
21 | . contributors: | |
22 | . Arnaldo Carvalho de Melo <acme@conectiva.com.br> | |
23 | . | |
24 | . Hardware multicast code from Peter Cammaert ( pc@denkart.be ) | |
25 | . | |
26 | . Sources: | |
27 | . o SMC databook | |
28 | . o skeleton.c by Donald Becker ( becker@scyld.com ) | |
29 | . o ( a LOT of advice from Becker as well ) | |
30 | . | |
31 | . History: | |
32 | . 12/07/95 Erik Stahlman written, got receive/xmit handled | |
33 | . 01/03/96 Erik Stahlman worked out some bugs, actually usable!!! :-) | |
34 | . 01/06/96 Erik Stahlman cleaned up some, better testing, etc | |
35 | . 01/29/96 Erik Stahlman fixed autoirq, added multicast | |
36 | . 02/01/96 Erik Stahlman 1. disabled all interrupts in smc_reset | |
37 | . 2. got rid of post-decrementing bug -- UGH. | |
38 | . 02/13/96 Erik Stahlman Tried to fix autoirq failure. Added more | |
39 | . descriptive error messages. | |
40 | . 02/15/96 Erik Stahlman Fixed typo that caused detection failure | |
41 | . 02/23/96 Erik Stahlman Modified it to fit into kernel tree | |
42 | . Added support to change hardware address | |
43 | . Cleared stats on opens | |
44 | . 02/26/96 Erik Stahlman Trial support for Kernel 1.2.13 | |
45 | . Kludge for automatic IRQ detection | |
46 | . 03/04/96 Erik Stahlman Fixed kernel 1.3.70 + | |
47 | . Fixed bug reported by Gardner Buchanan in | |
48 | . smc_enable, with outw instead of outb | |
49 | . 03/06/96 Erik Stahlman Added hardware multicast from Peter Cammaert | |
50 | . 04/14/00 Heiko Pruessing (SMA Regelsysteme) Fixed bug in chip memory | |
51 | . allocation | |
52 | . 08/20/00 Arnaldo Melo fix kfree(skb) in smc_hardware_send_packet | |
53 | . 12/15/00 Christian Jullien fix "Warning: kfree_skb on hard IRQ" | |
54 | . 11/08/01 Matt Domsch Use common crc32 function | |
55 | ----------------------------------------------------------------------------*/ | |
56 | ||
57 | static const char version[] = | |
58 | "smc9194.c:v0.14 12/15/00 by Erik Stahlman (erik@vt.edu)\n"; | |
59 | ||
60 | #include <linux/module.h> | |
61 | #include <linux/kernel.h> | |
62 | #include <linux/types.h> | |
63 | #include <linux/fcntl.h> | |
64 | #include <linux/interrupt.h> | |
65 | #include <linux/ioport.h> | |
66 | #include <linux/in.h> | |
67 | #include <linux/slab.h> | |
68 | #include <linux/string.h> | |
69 | #include <linux/init.h> | |
70 | #include <linux/crc32.h> | |
71 | #include <linux/errno.h> | |
72 | #include <linux/netdevice.h> | |
73 | #include <linux/etherdevice.h> | |
74 | #include <linux/skbuff.h> | |
75 | #include <linux/bitops.h> | |
76 | ||
77 | #include <asm/io.h> | |
78 | ||
79 | #include "smc9194.h" | |
80 | ||
81 | #define DRV_NAME "smc9194" | |
82 | ||
83 | /*------------------------------------------------------------------------ | |
84 | . | |
85 | . Configuration options, for the experienced user to change. | |
86 | . | |
87 | -------------------------------------------------------------------------*/ | |
88 | ||
89 | /* | |
90 | . Do you want to use 32 bit xfers? This should work on all chips, as | |
91 | . the chipset is designed to accommodate them. | |
92 | */ | |
93 | #ifdef __sh__ | |
94 | #undef USE_32_BIT | |
95 | #else | |
96 | #define USE_32_BIT 1 | |
97 | #endif | |
98 | ||
99 | #if defined(__H8300H__) || defined(__H8300S__) | |
100 | #define NO_AUTOPROBE | |
101 | #undef insl | |
102 | #undef outsl | |
103 | #define insl(a,b,l) io_insl_noswap(a,b,l) | |
104 | #define outsl(a,b,l) io_outsl_noswap(a,b,l) | |
105 | #endif | |
106 | ||
107 | /* | |
108 | .the SMC9194 can be at any of the following port addresses. To change, | |
109 | .for a slightly different card, you can add it to the array. Keep in | |
110 | .mind that the array must end in zero. | |
111 | */ | |
112 | ||
113 | struct devlist { | |
114 | unsigned int port; | |
115 | unsigned int irq; | |
116 | }; | |
117 | ||
118 | #if defined(CONFIG_H8S_EDOSK2674) | |
119 | static struct devlist smc_devlist[] __initdata = { | |
120 | {.port = 0xf80000, .irq = 16}, | |
121 | {.port = 0, .irq = 0 }, | |
122 | }; | |
123 | #else | |
124 | static struct devlist smc_devlist[] __initdata = { | |
125 | {.port = 0x200, .irq = 0}, | |
126 | {.port = 0x220, .irq = 0}, | |
127 | {.port = 0x240, .irq = 0}, | |
128 | {.port = 0x260, .irq = 0}, | |
129 | {.port = 0x280, .irq = 0}, | |
130 | {.port = 0x2A0, .irq = 0}, | |
131 | {.port = 0x2C0, .irq = 0}, | |
132 | {.port = 0x2E0, .irq = 0}, | |
133 | {.port = 0x300, .irq = 0}, | |
134 | {.port = 0x320, .irq = 0}, | |
135 | {.port = 0x340, .irq = 0}, | |
136 | {.port = 0x360, .irq = 0}, | |
137 | {.port = 0x380, .irq = 0}, | |
138 | {.port = 0x3A0, .irq = 0}, | |
139 | {.port = 0x3C0, .irq = 0}, | |
140 | {.port = 0x3E0, .irq = 0}, | |
141 | {.port = 0, .irq = 0}, | |
142 | }; | |
143 | #endif | |
144 | /* | |
145 | . Wait time for memory to be free. This probably shouldn't be | |
146 | . tuned that much, as waiting for this means nothing else happens | |
147 | . in the system | |
148 | */ | |
149 | #define MEMORY_WAIT_TIME 16 | |
150 | ||
151 | /* | |
152 | . DEBUGGING LEVELS | |
153 | . | |
154 | . 0 for normal operation | |
155 | . 1 for slightly more details | |
156 | . >2 for various levels of increasingly useless information | |
157 | . 2 for interrupt tracking, status flags | |
158 | . 3 for packet dumps, etc. | |
159 | */ | |
160 | #define SMC_DEBUG 0 | |
161 | ||
162 | #if (SMC_DEBUG > 2 ) | |
163 | #define PRINTK3(x) printk x | |
164 | #else | |
165 | #define PRINTK3(x) | |
166 | #endif | |
167 | ||
168 | #if SMC_DEBUG > 1 | |
169 | #define PRINTK2(x) printk x | |
170 | #else | |
171 | #define PRINTK2(x) | |
172 | #endif | |
173 | ||
174 | #ifdef SMC_DEBUG | |
175 | #define PRINTK(x) printk x | |
176 | #else | |
177 | #define PRINTK(x) | |
178 | #endif | |
179 | ||
180 | ||
181 | /*------------------------------------------------------------------------ | |
182 | . | |
183 | . The internal workings of the driver. If you are changing anything | |
184 | . here with the SMC stuff, you should have the datasheet and known | |
185 | . what you are doing. | |
186 | . | |
187 | -------------------------------------------------------------------------*/ | |
188 | #define CARDNAME "SMC9194" | |
189 | ||
190 | ||
191 | /* store this information for the driver.. */ | |
192 | struct smc_local { | |
193 | /* | |
194 | these are things that the kernel wants me to keep, so users | |
195 | can find out semi-useless statistics of how well the card is | |
196 | performing | |
197 | */ | |
198 | struct net_device_stats stats; | |
199 | ||
200 | /* | |
201 | If I have to wait until memory is available to send | |
202 | a packet, I will store the skbuff here, until I get the | |
203 | desired memory. Then, I'll send it out and free it. | |
204 | */ | |
205 | struct sk_buff * saved_skb; | |
206 | ||
207 | /* | |
208 | . This keeps track of how many packets that I have | |
209 | . sent out. When an TX_EMPTY interrupt comes, I know | |
210 | . that all of these have been sent. | |
211 | */ | |
212 | int packets_waiting; | |
213 | }; | |
214 | ||
215 | ||
216 | /*----------------------------------------------------------------- | |
217 | . | |
218 | . The driver can be entered at any of the following entry points. | |
219 | . | |
220 | .------------------------------------------------------------------ */ | |
221 | ||
222 | /* | |
223 | . This is called by register_netdev(). It is responsible for | |
224 | . checking the portlist for the SMC9000 series chipset. If it finds | |
225 | . one, then it will initialize the device, find the hardware information, | |
226 | . and sets up the appropriate device parameters. | |
227 | . NOTE: Interrupts are *OFF* when this procedure is called. | |
228 | . | |
229 | . NB:This shouldn't be static since it is referred to externally. | |
230 | */ | |
231 | struct net_device *smc_init(int unit); | |
232 | ||
233 | /* | |
234 | . The kernel calls this function when someone wants to use the device, | |
235 | . typically 'ifconfig ethX up'. | |
236 | */ | |
237 | static int smc_open(struct net_device *dev); | |
238 | ||
239 | /* | |
240 | . Our watchdog timed out. Called by the networking layer | |
241 | */ | |
242 | static void smc_timeout(struct net_device *dev); | |
243 | ||
244 | /* | |
245 | . This is called by the kernel in response to 'ifconfig ethX down'. It | |
246 | . is responsible for cleaning up everything that the open routine | |
247 | . does, and maybe putting the card into a powerdown state. | |
248 | */ | |
249 | static int smc_close(struct net_device *dev); | |
250 | ||
251 | /* | |
252 | . This routine allows the proc file system to query the driver's | |
253 | . statistics. | |
254 | */ | |
255 | static struct net_device_stats * smc_query_statistics( struct net_device *dev); | |
256 | ||
257 | /* | |
258 | . Finally, a call to set promiscuous mode ( for TCPDUMP and related | |
259 | . programs ) and multicast modes. | |
260 | */ | |
261 | static void smc_set_multicast_list(struct net_device *dev); | |
262 | ||
263 | ||
264 | /*--------------------------------------------------------------- | |
265 | . | |
266 | . Interrupt level calls.. | |
267 | . | |
268 | ----------------------------------------------------------------*/ | |
269 | ||
270 | /* | |
271 | . Handles the actual interrupt | |
272 | */ | |
273 | static irqreturn_t smc_interrupt(int irq, void *, struct pt_regs *regs); | |
274 | /* | |
275 | . This is a separate procedure to handle the receipt of a packet, to | |
276 | . leave the interrupt code looking slightly cleaner | |
277 | */ | |
278 | static inline void smc_rcv( struct net_device *dev ); | |
279 | /* | |
280 | . This handles a TX interrupt, which is only called when an error | |
281 | . relating to a packet is sent. | |
282 | */ | |
283 | static inline void smc_tx( struct net_device * dev ); | |
284 | ||
285 | /* | |
286 | ------------------------------------------------------------ | |
287 | . | |
288 | . Internal routines | |
289 | . | |
290 | ------------------------------------------------------------ | |
291 | */ | |
292 | ||
293 | /* | |
294 | . Test if a given location contains a chip, trying to cause as | |
295 | . little damage as possible if it's not a SMC chip. | |
296 | */ | |
297 | static int smc_probe(struct net_device *dev, int ioaddr); | |
298 | ||
299 | /* | |
300 | . A rather simple routine to print out a packet for debugging purposes. | |
301 | */ | |
302 | #if SMC_DEBUG > 2 | |
303 | static void print_packet( byte *, int ); | |
304 | #endif | |
305 | ||
306 | #define tx_done(dev) 1 | |
307 | ||
308 | /* this is called to actually send the packet to the chip */ | |
309 | static void smc_hardware_send_packet( struct net_device * dev ); | |
310 | ||
311 | /* Since I am not sure if I will have enough room in the chip's ram | |
312 | . to store the packet, I call this routine, which either sends it | |
313 | . now, or generates an interrupt when the card is ready for the | |
314 | . packet */ | |
315 | static int smc_wait_to_send_packet( struct sk_buff * skb, struct net_device *dev ); | |
316 | ||
317 | /* this does a soft reset on the device */ | |
318 | static void smc_reset( int ioaddr ); | |
319 | ||
320 | /* Enable Interrupts, Receive, and Transmit */ | |
321 | static void smc_enable( int ioaddr ); | |
322 | ||
323 | /* this puts the device in an inactive state */ | |
324 | static void smc_shutdown( int ioaddr ); | |
325 | ||
326 | /* This routine will find the IRQ of the driver if one is not | |
327 | . specified in the input to the device. */ | |
328 | static int smc_findirq( int ioaddr ); | |
329 | ||
330 | /* | |
331 | . Function: smc_reset( int ioaddr ) | |
332 | . Purpose: | |
333 | . This sets the SMC91xx chip to its normal state, hopefully from whatever | |
334 | . mess that any other DOS driver has put it in. | |
335 | . | |
336 | . Maybe I should reset more registers to defaults in here? SOFTRESET should | |
337 | . do that for me. | |
338 | . | |
339 | . Method: | |
340 | . 1. send a SOFT RESET | |
341 | . 2. wait for it to finish | |
342 | . 3. enable autorelease mode | |
343 | . 4. reset the memory management unit | |
344 | . 5. clear all interrupts | |
345 | . | |
346 | */ | |
347 | static void smc_reset( int ioaddr ) | |
348 | { | |
349 | /* This resets the registers mostly to defaults, but doesn't | |
350 | affect EEPROM. That seems unnecessary */ | |
351 | SMC_SELECT_BANK( 0 ); | |
352 | outw( RCR_SOFTRESET, ioaddr + RCR ); | |
353 | ||
354 | /* this should pause enough for the chip to be happy */ | |
355 | SMC_DELAY( ); | |
356 | ||
357 | /* Set the transmit and receive configuration registers to | |
358 | default values */ | |
359 | outw( RCR_CLEAR, ioaddr + RCR ); | |
360 | outw( TCR_CLEAR, ioaddr + TCR ); | |
361 | ||
362 | /* set the control register to automatically | |
363 | release successfully transmitted packets, to make the best | |
364 | use out of our limited memory */ | |
365 | SMC_SELECT_BANK( 1 ); | |
366 | outw( inw( ioaddr + CONTROL ) | CTL_AUTO_RELEASE , ioaddr + CONTROL ); | |
367 | ||
368 | /* Reset the MMU */ | |
369 | SMC_SELECT_BANK( 2 ); | |
370 | outw( MC_RESET, ioaddr + MMU_CMD ); | |
371 | ||
372 | /* Note: It doesn't seem that waiting for the MMU busy is needed here, | |
373 | but this is a place where future chipsets _COULD_ break. Be wary | |
374 | of issuing another MMU command right after this */ | |
375 | ||
376 | outb( 0, ioaddr + INT_MASK ); | |
377 | } | |
378 | ||
379 | /* | |
380 | . Function: smc_enable | |
381 | . Purpose: let the chip talk to the outside work | |
382 | . Method: | |
383 | . 1. Enable the transmitter | |
384 | . 2. Enable the receiver | |
385 | . 3. Enable interrupts | |
386 | */ | |
387 | static void smc_enable( int ioaddr ) | |
388 | { | |
389 | SMC_SELECT_BANK( 0 ); | |
390 | /* see the header file for options in TCR/RCR NORMAL*/ | |
391 | outw( TCR_NORMAL, ioaddr + TCR ); | |
392 | outw( RCR_NORMAL, ioaddr + RCR ); | |
393 | ||
394 | /* now, enable interrupts */ | |
395 | SMC_SELECT_BANK( 2 ); | |
396 | outb( SMC_INTERRUPT_MASK, ioaddr + INT_MASK ); | |
397 | } | |
398 | ||
399 | /* | |
400 | . Function: smc_shutdown | |
401 | . Purpose: closes down the SMC91xxx chip. | |
402 | . Method: | |
403 | . 1. zero the interrupt mask | |
404 | . 2. clear the enable receive flag | |
405 | . 3. clear the enable xmit flags | |
406 | . | |
407 | . TODO: | |
408 | . (1) maybe utilize power down mode. | |
409 | . Why not yet? Because while the chip will go into power down mode, | |
410 | . the manual says that it will wake up in response to any I/O requests | |
411 | . in the register space. Empirical results do not show this working. | |
412 | */ | |
413 | static void smc_shutdown( int ioaddr ) | |
414 | { | |
415 | /* no more interrupts for me */ | |
416 | SMC_SELECT_BANK( 2 ); | |
417 | outb( 0, ioaddr + INT_MASK ); | |
418 | ||
419 | /* and tell the card to stay away from that nasty outside world */ | |
420 | SMC_SELECT_BANK( 0 ); | |
421 | outb( RCR_CLEAR, ioaddr + RCR ); | |
422 | outb( TCR_CLEAR, ioaddr + TCR ); | |
423 | #if 0 | |
424 | /* finally, shut the chip down */ | |
425 | SMC_SELECT_BANK( 1 ); | |
426 | outw( inw( ioaddr + CONTROL ), CTL_POWERDOWN, ioaddr + CONTROL ); | |
427 | #endif | |
428 | } | |
429 | ||
430 | ||
431 | /* | |
432 | . Function: smc_setmulticast( int ioaddr, int count, dev_mc_list * adds ) | |
433 | . Purpose: | |
434 | . This sets the internal hardware table to filter out unwanted multicast | |
435 | . packets before they take up memory. | |
436 | . | |
437 | . The SMC chip uses a hash table where the high 6 bits of the CRC of | |
438 | . address are the offset into the table. If that bit is 1, then the | |
439 | . multicast packet is accepted. Otherwise, it's dropped silently. | |
440 | . | |
441 | . To use the 6 bits as an offset into the table, the high 3 bits are the | |
442 | . number of the 8 bit register, while the low 3 bits are the bit within | |
443 | . that register. | |
444 | . | |
445 | . This routine is based very heavily on the one provided by Peter Cammaert. | |
446 | */ | |
447 | ||
448 | ||
449 | static void smc_setmulticast( int ioaddr, int count, struct dev_mc_list * addrs ) { | |
450 | int i; | |
451 | unsigned char multicast_table[ 8 ]; | |
452 | struct dev_mc_list * cur_addr; | |
453 | /* table for flipping the order of 3 bits */ | |
454 | unsigned char invert3[] = { 0, 4, 2, 6, 1, 5, 3, 7 }; | |
455 | ||
456 | /* start with a table of all zeros: reject all */ | |
457 | memset( multicast_table, 0, sizeof( multicast_table ) ); | |
458 | ||
459 | cur_addr = addrs; | |
460 | for ( i = 0; i < count ; i ++, cur_addr = cur_addr->next ) { | |
461 | int position; | |
462 | ||
463 | /* do we have a pointer here? */ | |
464 | if ( !cur_addr ) | |
465 | break; | |
466 | /* make sure this is a multicast address - shouldn't this | |
467 | be a given if we have it here ? */ | |
468 | if ( !( *cur_addr->dmi_addr & 1 ) ) | |
469 | continue; | |
470 | ||
471 | /* only use the low order bits */ | |
472 | position = ether_crc_le(6, cur_addr->dmi_addr) & 0x3f; | |
473 | ||
474 | /* do some messy swapping to put the bit in the right spot */ | |
475 | multicast_table[invert3[position&7]] |= | |
476 | (1<<invert3[(position>>3)&7]); | |
477 | ||
478 | } | |
479 | /* now, the table can be loaded into the chipset */ | |
480 | SMC_SELECT_BANK( 3 ); | |
481 | ||
482 | for ( i = 0; i < 8 ; i++ ) { | |
483 | outb( multicast_table[i], ioaddr + MULTICAST1 + i ); | |
484 | } | |
485 | } | |
486 | ||
487 | /* | |
488 | . Function: smc_wait_to_send_packet( struct sk_buff * skb, struct net_device * ) | |
489 | . Purpose: | |
490 | . Attempt to allocate memory for a packet, if chip-memory is not | |
491 | . available, then tell the card to generate an interrupt when it | |
492 | . is available. | |
493 | . | |
494 | . Algorithm: | |
495 | . | |
496 | . o if the saved_skb is not currently null, then drop this packet | |
497 | . on the floor. This should never happen, because of TBUSY. | |
498 | . o if the saved_skb is null, then replace it with the current packet, | |
499 | . o See if I can sending it now. | |
500 | . o (NO): Enable interrupts and let the interrupt handler deal with it. | |
501 | . o (YES):Send it now. | |
502 | */ | |
503 | static int smc_wait_to_send_packet( struct sk_buff * skb, struct net_device * dev ) | |
504 | { | |
505 | struct smc_local *lp = netdev_priv(dev); | |
506 | unsigned int ioaddr = dev->base_addr; | |
507 | word length; | |
508 | unsigned short numPages; | |
509 | word time_out; | |
510 | ||
511 | netif_stop_queue(dev); | |
512 | /* Well, I want to send the packet.. but I don't know | |
513 | if I can send it right now... */ | |
514 | ||
515 | if ( lp->saved_skb) { | |
516 | /* THIS SHOULD NEVER HAPPEN. */ | |
517 | lp->stats.tx_aborted_errors++; | |
518 | printk(CARDNAME": Bad Craziness - sent packet while busy.\n" ); | |
519 | return 1; | |
520 | } | |
521 | lp->saved_skb = skb; | |
522 | ||
523 | length = skb->len; | |
524 | ||
525 | if (length < ETH_ZLEN) { | |
5b057c6b | 526 | if (skb_padto(skb, ETH_ZLEN)) { |
1da177e4 LT |
527 | netif_wake_queue(dev); |
528 | return 0; | |
529 | } | |
530 | length = ETH_ZLEN; | |
531 | } | |
532 | ||
533 | /* | |
534 | ** The MMU wants the number of pages to be the number of 256 bytes | |
535 | ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) ) | |
536 | ** | |
537 | ** Pkt size for allocating is data length +6 (for additional status words, | |
538 | ** length and ctl!) If odd size last byte is included in this header. | |
539 | */ | |
540 | numPages = ((length & 0xfffe) + 6) / 256; | |
541 | ||
542 | if (numPages > 7 ) { | |
543 | printk(CARDNAME": Far too big packet error. \n"); | |
544 | /* freeing the packet is a good thing here... but should | |
545 | . any packets of this size get down here? */ | |
546 | dev_kfree_skb (skb); | |
547 | lp->saved_skb = NULL; | |
548 | /* this IS an error, but, i don't want the skb saved */ | |
549 | netif_wake_queue(dev); | |
550 | return 0; | |
551 | } | |
552 | /* either way, a packet is waiting now */ | |
553 | lp->packets_waiting++; | |
554 | ||
555 | /* now, try to allocate the memory */ | |
556 | SMC_SELECT_BANK( 2 ); | |
557 | outw( MC_ALLOC | numPages, ioaddr + MMU_CMD ); | |
558 | /* | |
559 | . Performance Hack | |
560 | . | |
561 | . wait a short amount of time.. if I can send a packet now, I send | |
562 | . it now. Otherwise, I enable an interrupt and wait for one to be | |
563 | . available. | |
564 | . | |
565 | . I could have handled this a slightly different way, by checking to | |
566 | . see if any memory was available in the FREE MEMORY register. However, | |
567 | . either way, I need to generate an allocation, and the allocation works | |
568 | . no matter what, so I saw no point in checking free memory. | |
569 | */ | |
570 | time_out = MEMORY_WAIT_TIME; | |
571 | do { | |
572 | word status; | |
573 | ||
574 | status = inb( ioaddr + INTERRUPT ); | |
575 | if ( status & IM_ALLOC_INT ) { | |
576 | /* acknowledge the interrupt */ | |
577 | outb( IM_ALLOC_INT, ioaddr + INTERRUPT ); | |
578 | break; | |
579 | } | |
580 | } while ( -- time_out ); | |
581 | ||
582 | if ( !time_out ) { | |
583 | /* oh well, wait until the chip finds memory later */ | |
584 | SMC_ENABLE_INT( IM_ALLOC_INT ); | |
585 | PRINTK2((CARDNAME": memory allocation deferred. \n")); | |
586 | /* it's deferred, but I'll handle it later */ | |
587 | return 0; | |
588 | } | |
589 | /* or YES! I can send the packet now.. */ | |
590 | smc_hardware_send_packet(dev); | |
591 | netif_wake_queue(dev); | |
592 | return 0; | |
593 | } | |
594 | ||
595 | /* | |
596 | . Function: smc_hardware_send_packet(struct net_device * ) | |
597 | . Purpose: | |
598 | . This sends the actual packet to the SMC9xxx chip. | |
599 | . | |
600 | . Algorithm: | |
601 | . First, see if a saved_skb is available. | |
602 | . ( this should NOT be called if there is no 'saved_skb' | |
603 | . Now, find the packet number that the chip allocated | |
604 | . Point the data pointers at it in memory | |
605 | . Set the length word in the chip's memory | |
606 | . Dump the packet to chip memory | |
607 | . Check if a last byte is needed ( odd length packet ) | |
608 | . if so, set the control flag right | |
609 | . Tell the card to send it | |
610 | . Enable the transmit interrupt, so I know if it failed | |
611 | . Free the kernel data if I actually sent it. | |
612 | */ | |
613 | static void smc_hardware_send_packet( struct net_device * dev ) | |
614 | { | |
615 | struct smc_local *lp = netdev_priv(dev); | |
616 | byte packet_no; | |
617 | struct sk_buff * skb = lp->saved_skb; | |
618 | word length; | |
619 | unsigned int ioaddr; | |
620 | byte * buf; | |
621 | ||
622 | ioaddr = dev->base_addr; | |
623 | ||
624 | if ( !skb ) { | |
625 | PRINTK((CARDNAME": In XMIT with no packet to send \n")); | |
626 | return; | |
627 | } | |
628 | length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; | |
629 | buf = skb->data; | |
630 | ||
631 | /* If I get here, I _know_ there is a packet slot waiting for me */ | |
632 | packet_no = inb( ioaddr + PNR_ARR + 1 ); | |
633 | if ( packet_no & 0x80 ) { | |
634 | /* or isn't there? BAD CHIP! */ | |
635 | printk(KERN_DEBUG CARDNAME": Memory allocation failed. \n"); | |
636 | dev_kfree_skb_any(skb); | |
637 | lp->saved_skb = NULL; | |
638 | netif_wake_queue(dev); | |
639 | return; | |
640 | } | |
641 | ||
642 | /* we have a packet address, so tell the card to use it */ | |
643 | outb( packet_no, ioaddr + PNR_ARR ); | |
644 | ||
645 | /* point to the beginning of the packet */ | |
646 | outw( PTR_AUTOINC , ioaddr + POINTER ); | |
647 | ||
648 | PRINTK3((CARDNAME": Trying to xmit packet of length %x\n", length )); | |
649 | #if SMC_DEBUG > 2 | |
650 | print_packet( buf, length ); | |
651 | #endif | |
652 | ||
653 | /* send the packet length ( +6 for status, length and ctl byte ) | |
654 | and the status word ( set to zeros ) */ | |
655 | #ifdef USE_32_BIT | |
656 | outl( (length +6 ) << 16 , ioaddr + DATA_1 ); | |
657 | #else | |
658 | outw( 0, ioaddr + DATA_1 ); | |
659 | /* send the packet length ( +6 for status words, length, and ctl*/ | |
660 | outb( (length+6) & 0xFF,ioaddr + DATA_1 ); | |
661 | outb( (length+6) >> 8 , ioaddr + DATA_1 ); | |
662 | #endif | |
663 | ||
664 | /* send the actual data | |
665 | . I _think_ it's faster to send the longs first, and then | |
666 | . mop up by sending the last word. It depends heavily | |
667 | . on alignment, at least on the 486. Maybe it would be | |
668 | . a good idea to check which is optimal? But that could take | |
669 | . almost as much time as is saved? | |
670 | */ | |
671 | #ifdef USE_32_BIT | |
672 | if ( length & 0x2 ) { | |
673 | outsl(ioaddr + DATA_1, buf, length >> 2 ); | |
674 | #if !defined(__H8300H__) && !defined(__H8300S__) | |
675 | outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1); | |
676 | #else | |
677 | ctrl_outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1); | |
678 | #endif | |
679 | } | |
680 | else | |
681 | outsl(ioaddr + DATA_1, buf, length >> 2 ); | |
682 | #else | |
683 | outsw(ioaddr + DATA_1 , buf, (length ) >> 1); | |
684 | #endif | |
685 | /* Send the last byte, if there is one. */ | |
686 | ||
687 | if ( (length & 1) == 0 ) { | |
688 | outw( 0, ioaddr + DATA_1 ); | |
689 | } else { | |
690 | outb( buf[length -1 ], ioaddr + DATA_1 ); | |
691 | outb( 0x20, ioaddr + DATA_1); | |
692 | } | |
693 | ||
694 | /* enable the interrupts */ | |
695 | SMC_ENABLE_INT( (IM_TX_INT | IM_TX_EMPTY_INT) ); | |
696 | ||
697 | /* and let the chipset deal with it */ | |
698 | outw( MC_ENQUEUE , ioaddr + MMU_CMD ); | |
699 | ||
700 | PRINTK2((CARDNAME": Sent packet of length %d \n",length)); | |
701 | ||
702 | lp->saved_skb = NULL; | |
703 | dev_kfree_skb_any (skb); | |
704 | ||
705 | dev->trans_start = jiffies; | |
706 | ||
707 | /* we can send another packet */ | |
708 | netif_wake_queue(dev); | |
709 | ||
710 | return; | |
711 | } | |
712 | ||
713 | /*------------------------------------------------------------------------- | |
714 | | | |
715 | | smc_init(int unit) | |
716 | | Input parameters: | |
717 | | dev->base_addr == 0, try to find all possible locations | |
718 | | dev->base_addr == 1, return failure code | |
719 | | dev->base_addr == 2, always allocate space, and return success | |
720 | | dev->base_addr == <anything else> this is the address to check | |
721 | | | |
722 | | Output: | |
723 | | pointer to net_device or ERR_PTR(error) | |
724 | | | |
725 | --------------------------------------------------------------------------- | |
726 | */ | |
727 | static int io; | |
728 | static int irq; | |
729 | static int ifport; | |
730 | ||
731 | struct net_device * __init smc_init(int unit) | |
732 | { | |
733 | struct net_device *dev = alloc_etherdev(sizeof(struct smc_local)); | |
a2bd2ec8 | 734 | struct devlist *smcdev = smc_devlist; |
1da177e4 LT |
735 | int err = 0; |
736 | ||
1da177e4 LT |
737 | if (!dev) |
738 | return ERR_PTR(-ENODEV); | |
739 | ||
740 | if (unit >= 0) { | |
741 | sprintf(dev->name, "eth%d", unit); | |
742 | netdev_boot_setup_check(dev); | |
743 | io = dev->base_addr; | |
744 | irq = dev->irq; | |
745 | } | |
746 | ||
747 | SET_MODULE_OWNER(dev); | |
748 | ||
749 | if (io > 0x1ff) { /* Check a single specified location. */ | |
750 | err = smc_probe(dev, io); | |
751 | } else if (io != 0) { /* Don't probe at all. */ | |
752 | err = -ENXIO; | |
753 | } else { | |
754 | for (;smcdev->port; smcdev++) { | |
755 | if (smc_probe(dev, smcdev->port) == 0) | |
756 | break; | |
757 | } | |
758 | if (!smcdev->port) | |
759 | err = -ENODEV; | |
760 | } | |
761 | if (err) | |
762 | goto out; | |
763 | err = register_netdev(dev); | |
764 | if (err) | |
765 | goto out1; | |
766 | return dev; | |
767 | out1: | |
768 | free_irq(dev->irq, dev); | |
769 | release_region(dev->base_addr, SMC_IO_EXTENT); | |
770 | out: | |
771 | free_netdev(dev); | |
772 | return ERR_PTR(err); | |
773 | } | |
774 | ||
775 | /*---------------------------------------------------------------------- | |
776 | . smc_findirq | |
777 | . | |
778 | . This routine has a simple purpose -- make the SMC chip generate an | |
779 | . interrupt, so an auto-detect routine can detect it, and find the IRQ, | |
780 | ------------------------------------------------------------------------ | |
781 | */ | |
782 | int __init smc_findirq( int ioaddr ) | |
783 | { | |
784 | #ifndef NO_AUTOPROBE | |
785 | int timeout = 20; | |
786 | unsigned long cookie; | |
787 | ||
788 | ||
789 | cookie = probe_irq_on(); | |
790 | ||
791 | /* | |
792 | * What I try to do here is trigger an ALLOC_INT. This is done | |
793 | * by allocating a small chunk of memory, which will give an interrupt | |
794 | * when done. | |
795 | */ | |
796 | ||
797 | ||
798 | SMC_SELECT_BANK(2); | |
799 | /* enable ALLOCation interrupts ONLY */ | |
800 | outb( IM_ALLOC_INT, ioaddr + INT_MASK ); | |
801 | ||
802 | /* | |
803 | . Allocate 512 bytes of memory. Note that the chip was just | |
804 | . reset so all the memory is available | |
805 | */ | |
806 | outw( MC_ALLOC | 1, ioaddr + MMU_CMD ); | |
807 | ||
808 | /* | |
809 | . Wait until positive that the interrupt has been generated | |
810 | */ | |
811 | while ( timeout ) { | |
812 | byte int_status; | |
813 | ||
814 | int_status = inb( ioaddr + INTERRUPT ); | |
815 | ||
816 | if ( int_status & IM_ALLOC_INT ) | |
817 | break; /* got the interrupt */ | |
818 | timeout--; | |
819 | } | |
820 | /* there is really nothing that I can do here if timeout fails, | |
821 | as probe_irq_off will return a 0 anyway, which is what I | |
822 | want in this case. Plus, the clean up is needed in both | |
823 | cases. */ | |
824 | ||
825 | /* DELAY HERE! | |
826 | On a fast machine, the status might change before the interrupt | |
827 | is given to the processor. This means that the interrupt was | |
828 | never detected, and probe_irq_off fails to report anything. | |
829 | This should fix probe_irq_* problems. | |
830 | */ | |
831 | SMC_DELAY(); | |
832 | SMC_DELAY(); | |
833 | ||
834 | /* and disable all interrupts again */ | |
835 | outb( 0, ioaddr + INT_MASK ); | |
836 | ||
837 | /* and return what I found */ | |
838 | return probe_irq_off(cookie); | |
839 | #else /* NO_AUTOPROBE */ | |
840 | struct devlist *smcdev; | |
841 | for (smcdev = smc_devlist; smcdev->port; smcdev++) { | |
842 | if (smcdev->port == ioaddr) | |
843 | return smcdev->irq; | |
844 | } | |
845 | return 0; | |
846 | #endif | |
847 | } | |
848 | ||
849 | /*---------------------------------------------------------------------- | |
850 | . Function: smc_probe( int ioaddr ) | |
851 | . | |
852 | . Purpose: | |
853 | . Tests to see if a given ioaddr points to an SMC9xxx chip. | |
854 | . Returns a 0 on success | |
855 | . | |
856 | . Algorithm: | |
857 | . (1) see if the high byte of BANK_SELECT is 0x33 | |
858 | . (2) compare the ioaddr with the base register's address | |
859 | . (3) see if I recognize the chip ID in the appropriate register | |
860 | . | |
861 | .--------------------------------------------------------------------- | |
862 | */ | |
863 | ||
864 | /*--------------------------------------------------------------- | |
865 | . Here I do typical initialization tasks. | |
866 | . | |
867 | . o Initialize the structure if needed | |
868 | . o print out my vanity message if not done so already | |
869 | . o print out what type of hardware is detected | |
870 | . o print out the ethernet address | |
871 | . o find the IRQ | |
872 | . o set up my private data | |
873 | . o configure the dev structure with my subroutines | |
874 | . o actually GRAB the irq. | |
875 | . o GRAB the region | |
876 | .----------------------------------------------------------------- | |
877 | */ | |
878 | static int __init smc_probe(struct net_device *dev, int ioaddr) | |
879 | { | |
880 | int i, memory, retval; | |
881 | static unsigned version_printed; | |
882 | unsigned int bank; | |
883 | ||
884 | const char *version_string; | |
885 | const char *if_string; | |
886 | ||
887 | /* registers */ | |
888 | word revision_register; | |
889 | word base_address_register; | |
890 | word configuration_register; | |
891 | word memory_info_register; | |
892 | word memory_cfg_register; | |
893 | ||
894 | /* Grab the region so that no one else tries to probe our ioports. */ | |
895 | if (!request_region(ioaddr, SMC_IO_EXTENT, DRV_NAME)) | |
896 | return -EBUSY; | |
897 | ||
898 | dev->irq = irq; | |
899 | dev->if_port = ifport; | |
900 | ||
901 | /* First, see if the high byte is 0x33 */ | |
902 | bank = inw( ioaddr + BANK_SELECT ); | |
903 | if ( (bank & 0xFF00) != 0x3300 ) { | |
904 | retval = -ENODEV; | |
905 | goto err_out; | |
906 | } | |
907 | /* The above MIGHT indicate a device, but I need to write to further | |
908 | test this. */ | |
909 | outw( 0x0, ioaddr + BANK_SELECT ); | |
910 | bank = inw( ioaddr + BANK_SELECT ); | |
911 | if ( (bank & 0xFF00 ) != 0x3300 ) { | |
912 | retval = -ENODEV; | |
913 | goto err_out; | |
914 | } | |
915 | #if !defined(CONFIG_H8S_EDOSK2674) | |
916 | /* well, we've already written once, so hopefully another time won't | |
917 | hurt. This time, I need to switch the bank register to bank 1, | |
918 | so I can access the base address register */ | |
919 | SMC_SELECT_BANK(1); | |
920 | base_address_register = inw( ioaddr + BASE ); | |
921 | if ( ioaddr != ( base_address_register >> 3 & 0x3E0 ) ) { | |
922 | printk(CARDNAME ": IOADDR %x doesn't match configuration (%x)." | |
923 | "Probably not a SMC chip\n", | |
924 | ioaddr, base_address_register >> 3 & 0x3E0 ); | |
925 | /* well, the base address register didn't match. Must not have | |
926 | been a SMC chip after all. */ | |
927 | retval = -ENODEV; | |
928 | goto err_out; | |
929 | } | |
930 | #else | |
931 | (void)base_address_register; /* Warning suppression */ | |
932 | #endif | |
933 | ||
934 | ||
935 | /* check if the revision register is something that I recognize. | |
936 | These might need to be added to later, as future revisions | |
937 | could be added. */ | |
938 | SMC_SELECT_BANK(3); | |
939 | revision_register = inw( ioaddr + REVISION ); | |
940 | if ( !chip_ids[ ( revision_register >> 4 ) & 0xF ] ) { | |
941 | /* I don't recognize this chip, so... */ | |
942 | printk(CARDNAME ": IO %x: Unrecognized revision register:" | |
943 | " %x, Contact author. \n", ioaddr, revision_register ); | |
944 | ||
945 | retval = -ENODEV; | |
946 | goto err_out; | |
947 | } | |
948 | ||
949 | /* at this point I'll assume that the chip is an SMC9xxx. | |
950 | It might be prudent to check a listing of MAC addresses | |
951 | against the hardware address, or do some other tests. */ | |
952 | ||
953 | if (version_printed++ == 0) | |
954 | printk("%s", version); | |
955 | ||
956 | /* fill in some of the fields */ | |
957 | dev->base_addr = ioaddr; | |
958 | ||
959 | /* | |
960 | . Get the MAC address ( bank 1, regs 4 - 9 ) | |
961 | */ | |
962 | SMC_SELECT_BANK( 1 ); | |
963 | for ( i = 0; i < 6; i += 2 ) { | |
964 | word address; | |
965 | ||
966 | address = inw( ioaddr + ADDR0 + i ); | |
967 | dev->dev_addr[ i + 1] = address >> 8; | |
968 | dev->dev_addr[ i ] = address & 0xFF; | |
969 | } | |
970 | ||
971 | /* get the memory information */ | |
972 | ||
973 | SMC_SELECT_BANK( 0 ); | |
974 | memory_info_register = inw( ioaddr + MIR ); | |
975 | memory_cfg_register = inw( ioaddr + MCR ); | |
976 | memory = ( memory_cfg_register >> 9 ) & 0x7; /* multiplier */ | |
977 | memory *= 256 * ( memory_info_register & 0xFF ); | |
978 | ||
979 | /* | |
980 | Now, I want to find out more about the chip. This is sort of | |
981 | redundant, but it's cleaner to have it in both, rather than having | |
982 | one VERY long probe procedure. | |
983 | */ | |
984 | SMC_SELECT_BANK(3); | |
985 | revision_register = inw( ioaddr + REVISION ); | |
986 | version_string = chip_ids[ ( revision_register >> 4 ) & 0xF ]; | |
987 | if ( !version_string ) { | |
988 | /* I shouldn't get here because this call was done before.... */ | |
989 | retval = -ENODEV; | |
990 | goto err_out; | |
991 | } | |
992 | ||
993 | /* is it using AUI or 10BaseT ? */ | |
994 | if ( dev->if_port == 0 ) { | |
995 | SMC_SELECT_BANK(1); | |
996 | configuration_register = inw( ioaddr + CONFIG ); | |
997 | if ( configuration_register & CFG_AUI_SELECT ) | |
998 | dev->if_port = 2; | |
999 | else | |
1000 | dev->if_port = 1; | |
1001 | } | |
1002 | if_string = interfaces[ dev->if_port - 1 ]; | |
1003 | ||
1004 | /* now, reset the chip, and put it into a known state */ | |
1005 | smc_reset( ioaddr ); | |
1006 | ||
1007 | /* | |
1008 | . If dev->irq is 0, then the device has to be banged on to see | |
1009 | . what the IRQ is. | |
1010 | . | |
1011 | . This banging doesn't always detect the IRQ, for unknown reasons. | |
1012 | . a workaround is to reset the chip and try again. | |
1013 | . | |
1014 | . Interestingly, the DOS packet driver *SETS* the IRQ on the card to | |
1015 | . be what is requested on the command line. I don't do that, mostly | |
1016 | . because the card that I have uses a non-standard method of accessing | |
1017 | . the IRQs, and because this _should_ work in most configurations. | |
1018 | . | |
1019 | . Specifying an IRQ is done with the assumption that the user knows | |
1020 | . what (s)he is doing. No checking is done!!!! | |
1021 | . | |
1022 | */ | |
1023 | if ( dev->irq < 2 ) { | |
1024 | int trials; | |
1025 | ||
1026 | trials = 3; | |
1027 | while ( trials-- ) { | |
1028 | dev->irq = smc_findirq( ioaddr ); | |
1029 | if ( dev->irq ) | |
1030 | break; | |
1031 | /* kick the card and try again */ | |
1032 | smc_reset( ioaddr ); | |
1033 | } | |
1034 | } | |
1035 | if (dev->irq == 0 ) { | |
1036 | printk(CARDNAME": Couldn't autodetect your IRQ. Use irq=xx.\n"); | |
1037 | retval = -ENODEV; | |
1038 | goto err_out; | |
1039 | } | |
1040 | ||
1041 | /* now, print out the card info, in a short format.. */ | |
1042 | ||
1043 | printk("%s: %s(r:%d) at %#3x IRQ:%d INTF:%s MEM:%db ", dev->name, | |
1044 | version_string, revision_register & 0xF, ioaddr, dev->irq, | |
1045 | if_string, memory ); | |
1046 | /* | |
1047 | . Print the Ethernet address | |
1048 | */ | |
1049 | printk("ADDR: "); | |
1050 | for (i = 0; i < 5; i++) | |
1051 | printk("%2.2x:", dev->dev_addr[i] ); | |
1052 | printk("%2.2x \n", dev->dev_addr[5] ); | |
1053 | ||
1054 | /* set the private data to zero by default */ | |
1055 | memset(dev->priv, 0, sizeof(struct smc_local)); | |
1056 | ||
1057 | /* Grab the IRQ */ | |
1058 | retval = request_irq(dev->irq, &smc_interrupt, 0, DRV_NAME, dev); | |
1059 | if (retval) { | |
1060 | printk("%s: unable to get IRQ %d (irqval=%d).\n", DRV_NAME, | |
1061 | dev->irq, retval); | |
1062 | goto err_out; | |
1063 | } | |
1064 | ||
1065 | dev->open = smc_open; | |
1066 | dev->stop = smc_close; | |
1067 | dev->hard_start_xmit = smc_wait_to_send_packet; | |
1068 | dev->tx_timeout = smc_timeout; | |
1069 | dev->watchdog_timeo = HZ/20; | |
1070 | dev->get_stats = smc_query_statistics; | |
1071 | dev->set_multicast_list = smc_set_multicast_list; | |
1072 | ||
1073 | return 0; | |
1074 | ||
1075 | err_out: | |
1076 | release_region(ioaddr, SMC_IO_EXTENT); | |
1077 | return retval; | |
1078 | } | |
1079 | ||
1080 | #if SMC_DEBUG > 2 | |
1081 | static void print_packet( byte * buf, int length ) | |
1082 | { | |
1083 | #if 0 | |
1084 | int i; | |
1085 | int remainder; | |
1086 | int lines; | |
1087 | ||
1088 | printk("Packet of length %d \n", length ); | |
1089 | lines = length / 16; | |
1090 | remainder = length % 16; | |
1091 | ||
1092 | for ( i = 0; i < lines ; i ++ ) { | |
1093 | int cur; | |
1094 | ||
1095 | for ( cur = 0; cur < 8; cur ++ ) { | |
1096 | byte a, b; | |
1097 | ||
1098 | a = *(buf ++ ); | |
1099 | b = *(buf ++ ); | |
1100 | printk("%02x%02x ", a, b ); | |
1101 | } | |
1102 | printk("\n"); | |
1103 | } | |
1104 | for ( i = 0; i < remainder/2 ; i++ ) { | |
1105 | byte a, b; | |
1106 | ||
1107 | a = *(buf ++ ); | |
1108 | b = *(buf ++ ); | |
1109 | printk("%02x%02x ", a, b ); | |
1110 | } | |
1111 | printk("\n"); | |
1112 | #endif | |
1113 | } | |
1114 | #endif | |
1115 | ||
1116 | ||
1117 | /* | |
1118 | * Open and Initialize the board | |
1119 | * | |
1120 | * Set up everything, reset the card, etc .. | |
1121 | * | |
1122 | */ | |
1123 | static int smc_open(struct net_device *dev) | |
1124 | { | |
1125 | int ioaddr = dev->base_addr; | |
1126 | ||
1127 | int i; /* used to set hw ethernet address */ | |
1128 | ||
1129 | /* clear out all the junk that was put here before... */ | |
1130 | memset(dev->priv, 0, sizeof(struct smc_local)); | |
1131 | ||
1132 | /* reset the hardware */ | |
1133 | ||
1134 | smc_reset( ioaddr ); | |
1135 | smc_enable( ioaddr ); | |
1136 | ||
1137 | /* Select which interface to use */ | |
1138 | ||
1139 | SMC_SELECT_BANK( 1 ); | |
1140 | if ( dev->if_port == 1 ) { | |
1141 | outw( inw( ioaddr + CONFIG ) & ~CFG_AUI_SELECT, | |
1142 | ioaddr + CONFIG ); | |
1143 | } | |
1144 | else if ( dev->if_port == 2 ) { | |
1145 | outw( inw( ioaddr + CONFIG ) | CFG_AUI_SELECT, | |
1146 | ioaddr + CONFIG ); | |
1147 | } | |
1148 | ||
1149 | /* | |
1150 | According to Becker, I have to set the hardware address | |
1151 | at this point, because the (l)user can set it with an | |
1152 | ioctl. Easily done... | |
1153 | */ | |
1154 | SMC_SELECT_BANK( 1 ); | |
1155 | for ( i = 0; i < 6; i += 2 ) { | |
1156 | word address; | |
1157 | ||
1158 | address = dev->dev_addr[ i + 1 ] << 8 ; | |
1159 | address |= dev->dev_addr[ i ]; | |
1160 | outw( address, ioaddr + ADDR0 + i ); | |
1161 | } | |
1162 | ||
1163 | netif_start_queue(dev); | |
1164 | return 0; | |
1165 | } | |
1166 | ||
1167 | /*-------------------------------------------------------- | |
1168 | . Called by the kernel to send a packet out into the void | |
1169 | . of the net. This routine is largely based on | |
1170 | . skeleton.c, from Becker. | |
1171 | .-------------------------------------------------------- | |
1172 | */ | |
1173 | ||
1174 | static void smc_timeout(struct net_device *dev) | |
1175 | { | |
1176 | /* If we get here, some higher level has decided we are broken. | |
1177 | There should really be a "kick me" function call instead. */ | |
1178 | printk(KERN_WARNING CARDNAME": transmit timed out, %s?\n", | |
1179 | tx_done(dev) ? "IRQ conflict" : | |
1180 | "network cable problem"); | |
1181 | /* "kick" the adaptor */ | |
1182 | smc_reset( dev->base_addr ); | |
1183 | smc_enable( dev->base_addr ); | |
1184 | dev->trans_start = jiffies; | |
1185 | /* clear anything saved */ | |
1186 | ((struct smc_local *)dev->priv)->saved_skb = NULL; | |
1187 | netif_wake_queue(dev); | |
1188 | } | |
1189 | ||
1190 | /*------------------------------------------------------------- | |
1191 | . | |
1192 | . smc_rcv - receive a packet from the card | |
1193 | . | |
1194 | . There is ( at least ) a packet waiting to be read from | |
1195 | . chip-memory. | |
1196 | . | |
1197 | . o Read the status | |
1198 | . o If an error, record it | |
1199 | . o otherwise, read in the packet | |
1200 | -------------------------------------------------------------- | |
1201 | */ | |
1202 | static void smc_rcv(struct net_device *dev) | |
1203 | { | |
1204 | struct smc_local *lp = netdev_priv(dev); | |
1205 | int ioaddr = dev->base_addr; | |
1206 | int packet_number; | |
1207 | word status; | |
1208 | word packet_length; | |
1209 | ||
1210 | /* assume bank 2 */ | |
1211 | ||
1212 | packet_number = inw( ioaddr + FIFO_PORTS ); | |
1213 | ||
1214 | if ( packet_number & FP_RXEMPTY ) { | |
1215 | /* we got called , but nothing was on the FIFO */ | |
1216 | PRINTK((CARDNAME ": WARNING: smc_rcv with nothing on FIFO. \n")); | |
1217 | /* don't need to restore anything */ | |
1218 | return; | |
1219 | } | |
1220 | ||
1221 | /* start reading from the start of the packet */ | |
1222 | outw( PTR_READ | PTR_RCV | PTR_AUTOINC, ioaddr + POINTER ); | |
1223 | ||
1224 | /* First two words are status and packet_length */ | |
1225 | status = inw( ioaddr + DATA_1 ); | |
1226 | packet_length = inw( ioaddr + DATA_1 ); | |
1227 | ||
1228 | packet_length &= 0x07ff; /* mask off top bits */ | |
1229 | ||
1230 | PRINTK2(("RCV: STATUS %4x LENGTH %4x\n", status, packet_length )); | |
1231 | /* | |
1232 | . the packet length contains 3 extra words : | |
1233 | . status, length, and an extra word with an odd byte . | |
1234 | */ | |
1235 | packet_length -= 6; | |
1236 | ||
1237 | if ( !(status & RS_ERRORS ) ){ | |
1238 | /* do stuff to make a new packet */ | |
1239 | struct sk_buff * skb; | |
1240 | byte * data; | |
1241 | ||
1242 | /* read one extra byte */ | |
1243 | if ( status & RS_ODDFRAME ) | |
1244 | packet_length++; | |
1245 | ||
1246 | /* set multicast stats */ | |
1247 | if ( status & RS_MULTICAST ) | |
1248 | lp->stats.multicast++; | |
1249 | ||
1250 | skb = dev_alloc_skb( packet_length + 5); | |
1251 | ||
1252 | if ( skb == NULL ) { | |
1253 | printk(KERN_NOTICE CARDNAME ": Low memory, packet dropped.\n"); | |
1254 | lp->stats.rx_dropped++; | |
1255 | goto done; | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | ! This should work without alignment, but it could be | |
1260 | ! in the worse case | |
1261 | */ | |
1262 | ||
1263 | skb_reserve( skb, 2 ); /* 16 bit alignment */ | |
1264 | ||
1265 | skb->dev = dev; | |
1266 | data = skb_put( skb, packet_length); | |
1267 | ||
1268 | #ifdef USE_32_BIT | |
1269 | /* QUESTION: Like in the TX routine, do I want | |
1270 | to send the DWORDs or the bytes first, or some | |
1271 | mixture. A mixture might improve already slow PIO | |
1272 | performance */ | |
1273 | PRINTK3((" Reading %d dwords (and %d bytes) \n", | |
1274 | packet_length >> 2, packet_length & 3 )); | |
1275 | insl(ioaddr + DATA_1 , data, packet_length >> 2 ); | |
1276 | /* read the left over bytes */ | |
1277 | insb( ioaddr + DATA_1, data + (packet_length & 0xFFFFFC), | |
1278 | packet_length & 0x3 ); | |
1279 | #else | |
1280 | PRINTK3((" Reading %d words and %d byte(s) \n", | |
1281 | (packet_length >> 1 ), packet_length & 1 )); | |
1282 | insw(ioaddr + DATA_1 , data, packet_length >> 1); | |
1283 | if ( packet_length & 1 ) { | |
1284 | data += packet_length & ~1; | |
1285 | *(data++) = inb( ioaddr + DATA_1 ); | |
1286 | } | |
1287 | #endif | |
1288 | #if SMC_DEBUG > 2 | |
1289 | print_packet( data, packet_length ); | |
1290 | #endif | |
1291 | ||
1292 | skb->protocol = eth_type_trans(skb, dev ); | |
1293 | netif_rx(skb); | |
1294 | dev->last_rx = jiffies; | |
1295 | lp->stats.rx_packets++; | |
1296 | lp->stats.rx_bytes += packet_length; | |
1297 | } else { | |
1298 | /* error ... */ | |
1299 | lp->stats.rx_errors++; | |
1300 | ||
1301 | if ( status & RS_ALGNERR ) lp->stats.rx_frame_errors++; | |
1302 | if ( status & (RS_TOOSHORT | RS_TOOLONG ) ) | |
1303 | lp->stats.rx_length_errors++; | |
1304 | if ( status & RS_BADCRC) lp->stats.rx_crc_errors++; | |
1305 | } | |
1306 | ||
1307 | done: | |
1308 | /* error or good, tell the card to get rid of this packet */ | |
1309 | outw( MC_RELEASE, ioaddr + MMU_CMD ); | |
1310 | } | |
1311 | ||
1312 | ||
1313 | /************************************************************************* | |
1314 | . smc_tx | |
1315 | . | |
1316 | . Purpose: Handle a transmit error message. This will only be called | |
1317 | . when an error, because of the AUTO_RELEASE mode. | |
1318 | . | |
1319 | . Algorithm: | |
1320 | . Save pointer and packet no | |
1321 | . Get the packet no from the top of the queue | |
1322 | . check if it's valid ( if not, is this an error??? ) | |
1323 | . read the status word | |
1324 | . record the error | |
1325 | . ( resend? Not really, since we don't want old packets around ) | |
1326 | . Restore saved values | |
1327 | ************************************************************************/ | |
1328 | static void smc_tx( struct net_device * dev ) | |
1329 | { | |
1330 | int ioaddr = dev->base_addr; | |
1331 | struct smc_local *lp = netdev_priv(dev); | |
1332 | byte saved_packet; | |
1333 | byte packet_no; | |
1334 | word tx_status; | |
1335 | ||
1336 | ||
1337 | /* assume bank 2 */ | |
1338 | ||
1339 | saved_packet = inb( ioaddr + PNR_ARR ); | |
1340 | packet_no = inw( ioaddr + FIFO_PORTS ); | |
1341 | packet_no &= 0x7F; | |
1342 | ||
1343 | /* select this as the packet to read from */ | |
1344 | outb( packet_no, ioaddr + PNR_ARR ); | |
1345 | ||
1346 | /* read the first word from this packet */ | |
1347 | outw( PTR_AUTOINC | PTR_READ, ioaddr + POINTER ); | |
1348 | ||
1349 | tx_status = inw( ioaddr + DATA_1 ); | |
1350 | PRINTK3((CARDNAME": TX DONE STATUS: %4x \n", tx_status )); | |
1351 | ||
1352 | lp->stats.tx_errors++; | |
1353 | if ( tx_status & TS_LOSTCAR ) lp->stats.tx_carrier_errors++; | |
1354 | if ( tx_status & TS_LATCOL ) { | |
1355 | printk(KERN_DEBUG CARDNAME | |
1356 | ": Late collision occurred on last xmit.\n"); | |
1357 | lp->stats.tx_window_errors++; | |
1358 | } | |
1359 | #if 0 | |
1360 | if ( tx_status & TS_16COL ) { ... } | |
1361 | #endif | |
1362 | ||
1363 | if ( tx_status & TS_SUCCESS ) { | |
1364 | printk(CARDNAME": Successful packet caused interrupt \n"); | |
1365 | } | |
1366 | /* re-enable transmit */ | |
1367 | SMC_SELECT_BANK( 0 ); | |
1368 | outw( inw( ioaddr + TCR ) | TCR_ENABLE, ioaddr + TCR ); | |
1369 | ||
1370 | /* kill the packet */ | |
1371 | SMC_SELECT_BANK( 2 ); | |
1372 | outw( MC_FREEPKT, ioaddr + MMU_CMD ); | |
1373 | ||
1374 | /* one less packet waiting for me */ | |
1375 | lp->packets_waiting--; | |
1376 | ||
1377 | outb( saved_packet, ioaddr + PNR_ARR ); | |
1378 | return; | |
1379 | } | |
1380 | ||
1381 | /*-------------------------------------------------------------------- | |
1382 | . | |
1383 | . This is the main routine of the driver, to handle the device when | |
1384 | . it needs some attention. | |
1385 | . | |
1386 | . So: | |
1387 | . first, save state of the chipset | |
1388 | . branch off into routines to handle each case, and acknowledge | |
1389 | . each to the interrupt register | |
1390 | . and finally restore state. | |
1391 | . | |
1392 | ---------------------------------------------------------------------*/ | |
1393 | ||
1394 | static irqreturn_t smc_interrupt(int irq, void * dev_id, struct pt_regs * regs) | |
1395 | { | |
1396 | struct net_device *dev = dev_id; | |
1397 | int ioaddr = dev->base_addr; | |
1398 | struct smc_local *lp = netdev_priv(dev); | |
1399 | ||
1400 | byte status; | |
1401 | word card_stats; | |
1402 | byte mask; | |
1403 | int timeout; | |
1404 | /* state registers */ | |
1405 | word saved_bank; | |
1406 | word saved_pointer; | |
1407 | int handled = 0; | |
1408 | ||
1409 | ||
1410 | PRINTK3((CARDNAME": SMC interrupt started \n")); | |
1411 | ||
1412 | saved_bank = inw( ioaddr + BANK_SELECT ); | |
1413 | ||
1414 | SMC_SELECT_BANK(2); | |
1415 | saved_pointer = inw( ioaddr + POINTER ); | |
1416 | ||
1417 | mask = inb( ioaddr + INT_MASK ); | |
1418 | /* clear all interrupts */ | |
1419 | outb( 0, ioaddr + INT_MASK ); | |
1420 | ||
1421 | ||
1422 | /* set a timeout value, so I don't stay here forever */ | |
1423 | timeout = 4; | |
1424 | ||
1425 | PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x \n", mask )); | |
1426 | do { | |
1427 | /* read the status flag, and mask it */ | |
1428 | status = inb( ioaddr + INTERRUPT ) & mask; | |
1429 | if (!status ) | |
1430 | break; | |
1431 | ||
1432 | handled = 1; | |
1433 | ||
1434 | PRINTK3((KERN_WARNING CARDNAME | |
1435 | ": Handling interrupt status %x \n", status )); | |
1436 | ||
1437 | if (status & IM_RCV_INT) { | |
1438 | /* Got a packet(s). */ | |
1439 | PRINTK2((KERN_WARNING CARDNAME | |
1440 | ": Receive Interrupt\n")); | |
1441 | smc_rcv(dev); | |
1442 | } else if (status & IM_TX_INT ) { | |
1443 | PRINTK2((KERN_WARNING CARDNAME | |
1444 | ": TX ERROR handled\n")); | |
1445 | smc_tx(dev); | |
1446 | outb(IM_TX_INT, ioaddr + INTERRUPT ); | |
1447 | } else if (status & IM_TX_EMPTY_INT ) { | |
1448 | /* update stats */ | |
1449 | SMC_SELECT_BANK( 0 ); | |
1450 | card_stats = inw( ioaddr + COUNTER ); | |
1451 | /* single collisions */ | |
1452 | lp->stats.collisions += card_stats & 0xF; | |
1453 | card_stats >>= 4; | |
1454 | /* multiple collisions */ | |
1455 | lp->stats.collisions += card_stats & 0xF; | |
1456 | ||
1457 | /* these are for when linux supports these statistics */ | |
1458 | ||
1459 | SMC_SELECT_BANK( 2 ); | |
1460 | PRINTK2((KERN_WARNING CARDNAME | |
1461 | ": TX_BUFFER_EMPTY handled\n")); | |
1462 | outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT ); | |
1463 | mask &= ~IM_TX_EMPTY_INT; | |
1464 | lp->stats.tx_packets += lp->packets_waiting; | |
1465 | lp->packets_waiting = 0; | |
1466 | ||
1467 | } else if (status & IM_ALLOC_INT ) { | |
1468 | PRINTK2((KERN_DEBUG CARDNAME | |
1469 | ": Allocation interrupt \n")); | |
1470 | /* clear this interrupt so it doesn't happen again */ | |
1471 | mask &= ~IM_ALLOC_INT; | |
1472 | ||
1473 | smc_hardware_send_packet( dev ); | |
1474 | ||
1475 | /* enable xmit interrupts based on this */ | |
1476 | mask |= ( IM_TX_EMPTY_INT | IM_TX_INT ); | |
1477 | ||
1478 | /* and let the card send more packets to me */ | |
1479 | netif_wake_queue(dev); | |
1480 | ||
1481 | PRINTK2((CARDNAME": Handoff done successfully.\n")); | |
1482 | } else if (status & IM_RX_OVRN_INT ) { | |
1483 | lp->stats.rx_errors++; | |
1484 | lp->stats.rx_fifo_errors++; | |
1485 | outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT ); | |
1486 | } else if (status & IM_EPH_INT ) { | |
1487 | PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT \n")); | |
1488 | } else if (status & IM_ERCV_INT ) { | |
1489 | PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT \n")); | |
1490 | outb( IM_ERCV_INT, ioaddr + INTERRUPT ); | |
1491 | } | |
1492 | } while ( timeout -- ); | |
1493 | ||
1494 | ||
1495 | /* restore state register */ | |
1496 | SMC_SELECT_BANK( 2 ); | |
1497 | outb( mask, ioaddr + INT_MASK ); | |
1498 | ||
1499 | PRINTK3(( KERN_WARNING CARDNAME ": MASK is now %x \n", mask )); | |
1500 | outw( saved_pointer, ioaddr + POINTER ); | |
1501 | ||
1502 | SMC_SELECT_BANK( saved_bank ); | |
1503 | ||
1504 | PRINTK3((CARDNAME ": Interrupt done\n")); | |
1505 | return IRQ_RETVAL(handled); | |
1506 | } | |
1507 | ||
1508 | ||
1509 | /*---------------------------------------------------- | |
1510 | . smc_close | |
1511 | . | |
1512 | . this makes the board clean up everything that it can | |
1513 | . and not talk to the outside world. Caused by | |
1514 | . an 'ifconfig ethX down' | |
1515 | . | |
1516 | -----------------------------------------------------*/ | |
1517 | static int smc_close(struct net_device *dev) | |
1518 | { | |
1519 | netif_stop_queue(dev); | |
1520 | /* clear everything */ | |
1521 | smc_shutdown( dev->base_addr ); | |
1522 | ||
1523 | /* Update the statistics here. */ | |
1524 | return 0; | |
1525 | } | |
1526 | ||
1527 | /*------------------------------------------------------------ | |
1528 | . Get the current statistics. | |
1529 | . This may be called with the card open or closed. | |
1530 | .-------------------------------------------------------------*/ | |
1531 | static struct net_device_stats* smc_query_statistics(struct net_device *dev) { | |
1532 | struct smc_local *lp = netdev_priv(dev); | |
1533 | ||
1534 | return &lp->stats; | |
1535 | } | |
1536 | ||
1537 | /*----------------------------------------------------------- | |
1538 | . smc_set_multicast_list | |
1539 | . | |
1540 | . This routine will, depending on the values passed to it, | |
1541 | . either make it accept multicast packets, go into | |
1542 | . promiscuous mode ( for TCPDUMP and cousins ) or accept | |
1543 | . a select set of multicast packets | |
1544 | */ | |
1545 | static void smc_set_multicast_list(struct net_device *dev) | |
1546 | { | |
1547 | short ioaddr = dev->base_addr; | |
1548 | ||
1549 | SMC_SELECT_BANK(0); | |
1550 | if ( dev->flags & IFF_PROMISC ) | |
1551 | outw( inw(ioaddr + RCR ) | RCR_PROMISC, ioaddr + RCR ); | |
1552 | ||
1553 | /* BUG? I never disable promiscuous mode if multicasting was turned on. | |
1554 | Now, I turn off promiscuous mode, but I don't do anything to multicasting | |
1555 | when promiscuous mode is turned on. | |
1556 | */ | |
1557 | ||
1558 | /* Here, I am setting this to accept all multicast packets. | |
1559 | I don't need to zero the multicast table, because the flag is | |
1560 | checked before the table is | |
1561 | */ | |
1562 | else if (dev->flags & IFF_ALLMULTI) | |
1563 | outw( inw(ioaddr + RCR ) | RCR_ALMUL, ioaddr + RCR ); | |
1564 | ||
1565 | /* We just get all multicast packets even if we only want them | |
1566 | . from one source. This will be changed at some future | |
1567 | . point. */ | |
1568 | else if (dev->mc_count ) { | |
1569 | /* support hardware multicasting */ | |
1570 | ||
1571 | /* be sure I get rid of flags I might have set */ | |
1572 | outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL), | |
1573 | ioaddr + RCR ); | |
1574 | /* NOTE: this has to set the bank, so make sure it is the | |
1575 | last thing called. The bank is set to zero at the top */ | |
1576 | smc_setmulticast( ioaddr, dev->mc_count, dev->mc_list ); | |
1577 | } | |
1578 | else { | |
1579 | outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL), | |
1580 | ioaddr + RCR ); | |
1581 | ||
1582 | /* | |
1583 | since I'm disabling all multicast entirely, I need to | |
1584 | clear the multicast list | |
1585 | */ | |
1586 | SMC_SELECT_BANK( 3 ); | |
1587 | outw( 0, ioaddr + MULTICAST1 ); | |
1588 | outw( 0, ioaddr + MULTICAST2 ); | |
1589 | outw( 0, ioaddr + MULTICAST3 ); | |
1590 | outw( 0, ioaddr + MULTICAST4 ); | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | #ifdef MODULE | |
1595 | ||
1596 | static struct net_device *devSMC9194; | |
1597 | MODULE_LICENSE("GPL"); | |
1598 | ||
1599 | module_param(io, int, 0); | |
1600 | module_param(irq, int, 0); | |
1601 | module_param(ifport, int, 0); | |
1602 | MODULE_PARM_DESC(io, "SMC 99194 I/O base address"); | |
1603 | MODULE_PARM_DESC(irq, "SMC 99194 IRQ number"); | |
1604 | MODULE_PARM_DESC(ifport, "SMC 99194 interface port (0-default, 1-TP, 2-AUI)"); | |
1605 | ||
a2bd2ec8 | 1606 | int __init init_module(void) |
1da177e4 LT |
1607 | { |
1608 | if (io == 0) | |
1609 | printk(KERN_WARNING | |
1610 | CARDNAME": You shouldn't use auto-probing with insmod!\n" ); | |
1611 | ||
1612 | /* copy the parameters from insmod into the device structure */ | |
1613 | devSMC9194 = smc_init(-1); | |
1614 | if (IS_ERR(devSMC9194)) | |
1615 | return PTR_ERR(devSMC9194); | |
1616 | return 0; | |
1617 | } | |
1618 | ||
1619 | void cleanup_module(void) | |
1620 | { | |
1621 | unregister_netdev(devSMC9194); | |
1622 | free_irq(devSMC9194->irq, devSMC9194); | |
1623 | release_region(devSMC9194->base_addr, SMC_IO_EXTENT); | |
1624 | free_netdev(devSMC9194); | |
1625 | } | |
1626 | ||
1627 | #endif /* MODULE */ |