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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> | |
1da177e4 LT |
67 | #include <linux/string.h> |
68 | #include <linux/init.h> | |
69 | #include <linux/crc32.h> | |
70 | #include <linux/errno.h> | |
71 | #include <linux/netdevice.h> | |
72 | #include <linux/etherdevice.h> | |
73 | #include <linux/skbuff.h> | |
74 | #include <linux/bitops.h> | |
75 | ||
76 | #include <asm/io.h> | |
77 | ||
78 | #include "smc9194.h" | |
79 | ||
80 | #define DRV_NAME "smc9194" | |
81 | ||
82 | /*------------------------------------------------------------------------ | |
83 | . | |
84 | . Configuration options, for the experienced user to change. | |
85 | . | |
86 | -------------------------------------------------------------------------*/ | |
87 | ||
88 | /* | |
89 | . Do you want to use 32 bit xfers? This should work on all chips, as | |
90 | . the chipset is designed to accommodate them. | |
91 | */ | |
92 | #ifdef __sh__ | |
93 | #undef USE_32_BIT | |
94 | #else | |
95 | #define USE_32_BIT 1 | |
96 | #endif | |
97 | ||
98 | #if defined(__H8300H__) || defined(__H8300S__) | |
99 | #define NO_AUTOPROBE | |
100 | #undef insl | |
101 | #undef outsl | |
102 | #define insl(a,b,l) io_insl_noswap(a,b,l) | |
103 | #define outsl(a,b,l) io_outsl_noswap(a,b,l) | |
104 | #endif | |
105 | ||
106 | /* | |
107 | .the SMC9194 can be at any of the following port addresses. To change, | |
108 | .for a slightly different card, you can add it to the array. Keep in | |
109 | .mind that the array must end in zero. | |
110 | */ | |
111 | ||
112 | struct devlist { | |
113 | unsigned int port; | |
114 | unsigned int irq; | |
115 | }; | |
116 | ||
117 | #if defined(CONFIG_H8S_EDOSK2674) | |
118 | static struct devlist smc_devlist[] __initdata = { | |
119 | {.port = 0xf80000, .irq = 16}, | |
120 | {.port = 0, .irq = 0 }, | |
121 | }; | |
122 | #else | |
123 | static struct devlist smc_devlist[] __initdata = { | |
124 | {.port = 0x200, .irq = 0}, | |
125 | {.port = 0x220, .irq = 0}, | |
126 | {.port = 0x240, .irq = 0}, | |
127 | {.port = 0x260, .irq = 0}, | |
128 | {.port = 0x280, .irq = 0}, | |
129 | {.port = 0x2A0, .irq = 0}, | |
130 | {.port = 0x2C0, .irq = 0}, | |
131 | {.port = 0x2E0, .irq = 0}, | |
132 | {.port = 0x300, .irq = 0}, | |
133 | {.port = 0x320, .irq = 0}, | |
134 | {.port = 0x340, .irq = 0}, | |
135 | {.port = 0x360, .irq = 0}, | |
136 | {.port = 0x380, .irq = 0}, | |
137 | {.port = 0x3A0, .irq = 0}, | |
138 | {.port = 0x3C0, .irq = 0}, | |
139 | {.port = 0x3E0, .irq = 0}, | |
140 | {.port = 0, .irq = 0}, | |
141 | }; | |
142 | #endif | |
143 | /* | |
144 | . Wait time for memory to be free. This probably shouldn't be | |
145 | . tuned that much, as waiting for this means nothing else happens | |
146 | . in the system | |
147 | */ | |
148 | #define MEMORY_WAIT_TIME 16 | |
149 | ||
150 | /* | |
151 | . DEBUGGING LEVELS | |
152 | . | |
153 | . 0 for normal operation | |
154 | . 1 for slightly more details | |
155 | . >2 for various levels of increasingly useless information | |
156 | . 2 for interrupt tracking, status flags | |
157 | . 3 for packet dumps, etc. | |
158 | */ | |
159 | #define SMC_DEBUG 0 | |
160 | ||
161 | #if (SMC_DEBUG > 2 ) | |
162 | #define PRINTK3(x) printk x | |
163 | #else | |
164 | #define PRINTK3(x) | |
165 | #endif | |
166 | ||
167 | #if SMC_DEBUG > 1 | |
168 | #define PRINTK2(x) printk x | |
169 | #else | |
170 | #define PRINTK2(x) | |
171 | #endif | |
172 | ||
173 | #ifdef SMC_DEBUG | |
174 | #define PRINTK(x) printk x | |
175 | #else | |
176 | #define PRINTK(x) | |
177 | #endif | |
178 | ||
179 | ||
180 | /*------------------------------------------------------------------------ | |
181 | . | |
182 | . The internal workings of the driver. If you are changing anything | |
183 | . here with the SMC stuff, you should have the datasheet and known | |
184 | . what you are doing. | |
185 | . | |
186 | -------------------------------------------------------------------------*/ | |
187 | #define CARDNAME "SMC9194" | |
188 | ||
189 | ||
190 | /* store this information for the driver.. */ | |
191 | struct smc_local { | |
1da177e4 LT |
192 | /* |
193 | If I have to wait until memory is available to send | |
194 | a packet, I will store the skbuff here, until I get the | |
195 | desired memory. Then, I'll send it out and free it. | |
196 | */ | |
197 | struct sk_buff * saved_skb; | |
198 | ||
199 | /* | |
200 | . This keeps track of how many packets that I have | |
201 | . sent out. When an TX_EMPTY interrupt comes, I know | |
202 | . that all of these have been sent. | |
203 | */ | |
204 | int packets_waiting; | |
205 | }; | |
206 | ||
207 | ||
208 | /*----------------------------------------------------------------- | |
209 | . | |
210 | . The driver can be entered at any of the following entry points. | |
211 | . | |
212 | .------------------------------------------------------------------ */ | |
213 | ||
214 | /* | |
215 | . This is called by register_netdev(). It is responsible for | |
216 | . checking the portlist for the SMC9000 series chipset. If it finds | |
217 | . one, then it will initialize the device, find the hardware information, | |
218 | . and sets up the appropriate device parameters. | |
219 | . NOTE: Interrupts are *OFF* when this procedure is called. | |
220 | . | |
221 | . NB:This shouldn't be static since it is referred to externally. | |
222 | */ | |
223 | struct net_device *smc_init(int unit); | |
224 | ||
225 | /* | |
226 | . The kernel calls this function when someone wants to use the device, | |
227 | . typically 'ifconfig ethX up'. | |
228 | */ | |
229 | static int smc_open(struct net_device *dev); | |
230 | ||
231 | /* | |
232 | . Our watchdog timed out. Called by the networking layer | |
233 | */ | |
234 | static void smc_timeout(struct net_device *dev); | |
235 | ||
236 | /* | |
237 | . This is called by the kernel in response to 'ifconfig ethX down'. It | |
238 | . is responsible for cleaning up everything that the open routine | |
239 | . does, and maybe putting the card into a powerdown state. | |
240 | */ | |
241 | static int smc_close(struct net_device *dev); | |
242 | ||
1da177e4 LT |
243 | /* |
244 | . Finally, a call to set promiscuous mode ( for TCPDUMP and related | |
245 | . programs ) and multicast modes. | |
246 | */ | |
247 | static void smc_set_multicast_list(struct net_device *dev); | |
248 | ||
249 | ||
250 | /*--------------------------------------------------------------- | |
251 | . | |
252 | . Interrupt level calls.. | |
253 | . | |
254 | ----------------------------------------------------------------*/ | |
255 | ||
256 | /* | |
257 | . Handles the actual interrupt | |
258 | */ | |
7d12e780 | 259 | static irqreturn_t smc_interrupt(int irq, void *); |
1da177e4 LT |
260 | /* |
261 | . This is a separate procedure to handle the receipt of a packet, to | |
262 | . leave the interrupt code looking slightly cleaner | |
263 | */ | |
264 | static inline void smc_rcv( struct net_device *dev ); | |
265 | /* | |
266 | . This handles a TX interrupt, which is only called when an error | |
267 | . relating to a packet is sent. | |
268 | */ | |
269 | static inline void smc_tx( struct net_device * dev ); | |
270 | ||
271 | /* | |
272 | ------------------------------------------------------------ | |
273 | . | |
274 | . Internal routines | |
275 | . | |
276 | ------------------------------------------------------------ | |
277 | */ | |
278 | ||
279 | /* | |
280 | . Test if a given location contains a chip, trying to cause as | |
281 | . little damage as possible if it's not a SMC chip. | |
282 | */ | |
283 | static int smc_probe(struct net_device *dev, int ioaddr); | |
284 | ||
285 | /* | |
286 | . A rather simple routine to print out a packet for debugging purposes. | |
287 | */ | |
288 | #if SMC_DEBUG > 2 | |
289 | static void print_packet( byte *, int ); | |
290 | #endif | |
291 | ||
292 | #define tx_done(dev) 1 | |
293 | ||
294 | /* this is called to actually send the packet to the chip */ | |
295 | static void smc_hardware_send_packet( struct net_device * dev ); | |
296 | ||
297 | /* Since I am not sure if I will have enough room in the chip's ram | |
298 | . to store the packet, I call this routine, which either sends it | |
299 | . now, or generates an interrupt when the card is ready for the | |
300 | . packet */ | |
61357325 SH |
301 | static netdev_tx_t smc_wait_to_send_packet( struct sk_buff * skb, |
302 | struct net_device *dev ); | |
1da177e4 LT |
303 | |
304 | /* this does a soft reset on the device */ | |
305 | static void smc_reset( int ioaddr ); | |
306 | ||
307 | /* Enable Interrupts, Receive, and Transmit */ | |
308 | static void smc_enable( int ioaddr ); | |
309 | ||
310 | /* this puts the device in an inactive state */ | |
311 | static void smc_shutdown( int ioaddr ); | |
312 | ||
313 | /* This routine will find the IRQ of the driver if one is not | |
314 | . specified in the input to the device. */ | |
315 | static int smc_findirq( int ioaddr ); | |
316 | ||
317 | /* | |
318 | . Function: smc_reset( int ioaddr ) | |
319 | . Purpose: | |
320 | . This sets the SMC91xx chip to its normal state, hopefully from whatever | |
321 | . mess that any other DOS driver has put it in. | |
322 | . | |
323 | . Maybe I should reset more registers to defaults in here? SOFTRESET should | |
324 | . do that for me. | |
325 | . | |
326 | . Method: | |
327 | . 1. send a SOFT RESET | |
328 | . 2. wait for it to finish | |
329 | . 3. enable autorelease mode | |
330 | . 4. reset the memory management unit | |
331 | . 5. clear all interrupts | |
332 | . | |
333 | */ | |
334 | static void smc_reset( int ioaddr ) | |
335 | { | |
336 | /* This resets the registers mostly to defaults, but doesn't | |
337 | affect EEPROM. That seems unnecessary */ | |
338 | SMC_SELECT_BANK( 0 ); | |
339 | outw( RCR_SOFTRESET, ioaddr + RCR ); | |
340 | ||
341 | /* this should pause enough for the chip to be happy */ | |
342 | SMC_DELAY( ); | |
343 | ||
344 | /* Set the transmit and receive configuration registers to | |
345 | default values */ | |
346 | outw( RCR_CLEAR, ioaddr + RCR ); | |
347 | outw( TCR_CLEAR, ioaddr + TCR ); | |
348 | ||
349 | /* set the control register to automatically | |
350 | release successfully transmitted packets, to make the best | |
351 | use out of our limited memory */ | |
352 | SMC_SELECT_BANK( 1 ); | |
353 | outw( inw( ioaddr + CONTROL ) | CTL_AUTO_RELEASE , ioaddr + CONTROL ); | |
354 | ||
355 | /* Reset the MMU */ | |
356 | SMC_SELECT_BANK( 2 ); | |
357 | outw( MC_RESET, ioaddr + MMU_CMD ); | |
358 | ||
359 | /* Note: It doesn't seem that waiting for the MMU busy is needed here, | |
360 | but this is a place where future chipsets _COULD_ break. Be wary | |
361 | of issuing another MMU command right after this */ | |
362 | ||
363 | outb( 0, ioaddr + INT_MASK ); | |
364 | } | |
365 | ||
366 | /* | |
367 | . Function: smc_enable | |
368 | . Purpose: let the chip talk to the outside work | |
369 | . Method: | |
370 | . 1. Enable the transmitter | |
371 | . 2. Enable the receiver | |
372 | . 3. Enable interrupts | |
373 | */ | |
374 | static void smc_enable( int ioaddr ) | |
375 | { | |
376 | SMC_SELECT_BANK( 0 ); | |
377 | /* see the header file for options in TCR/RCR NORMAL*/ | |
378 | outw( TCR_NORMAL, ioaddr + TCR ); | |
379 | outw( RCR_NORMAL, ioaddr + RCR ); | |
380 | ||
381 | /* now, enable interrupts */ | |
382 | SMC_SELECT_BANK( 2 ); | |
383 | outb( SMC_INTERRUPT_MASK, ioaddr + INT_MASK ); | |
384 | } | |
385 | ||
386 | /* | |
387 | . Function: smc_shutdown | |
388 | . Purpose: closes down the SMC91xxx chip. | |
389 | . Method: | |
390 | . 1. zero the interrupt mask | |
391 | . 2. clear the enable receive flag | |
392 | . 3. clear the enable xmit flags | |
393 | . | |
394 | . TODO: | |
395 | . (1) maybe utilize power down mode. | |
396 | . Why not yet? Because while the chip will go into power down mode, | |
397 | . the manual says that it will wake up in response to any I/O requests | |
398 | . in the register space. Empirical results do not show this working. | |
399 | */ | |
400 | static void smc_shutdown( int ioaddr ) | |
401 | { | |
402 | /* no more interrupts for me */ | |
403 | SMC_SELECT_BANK( 2 ); | |
404 | outb( 0, ioaddr + INT_MASK ); | |
405 | ||
406 | /* and tell the card to stay away from that nasty outside world */ | |
407 | SMC_SELECT_BANK( 0 ); | |
408 | outb( RCR_CLEAR, ioaddr + RCR ); | |
409 | outb( TCR_CLEAR, ioaddr + TCR ); | |
410 | #if 0 | |
411 | /* finally, shut the chip down */ | |
412 | SMC_SELECT_BANK( 1 ); | |
413 | outw( inw( ioaddr + CONTROL ), CTL_POWERDOWN, ioaddr + CONTROL ); | |
414 | #endif | |
415 | } | |
416 | ||
417 | ||
418 | /* | |
22bedad3 | 419 | . Function: smc_setmulticast( int ioaddr, struct net_device *dev ) |
1da177e4 LT |
420 | . Purpose: |
421 | . This sets the internal hardware table to filter out unwanted multicast | |
422 | . packets before they take up memory. | |
423 | . | |
424 | . The SMC chip uses a hash table where the high 6 bits of the CRC of | |
425 | . address are the offset into the table. If that bit is 1, then the | |
426 | . multicast packet is accepted. Otherwise, it's dropped silently. | |
427 | . | |
428 | . To use the 6 bits as an offset into the table, the high 3 bits are the | |
429 | . number of the 8 bit register, while the low 3 bits are the bit within | |
430 | . that register. | |
431 | . | |
432 | . This routine is based very heavily on the one provided by Peter Cammaert. | |
433 | */ | |
434 | ||
435 | ||
567ec874 JP |
436 | static void smc_setmulticast(int ioaddr, struct net_device *dev) |
437 | { | |
1da177e4 LT |
438 | int i; |
439 | unsigned char multicast_table[ 8 ]; | |
22bedad3 | 440 | struct netdev_hw_addr *ha; |
1da177e4 LT |
441 | /* table for flipping the order of 3 bits */ |
442 | unsigned char invert3[] = { 0, 4, 2, 6, 1, 5, 3, 7 }; | |
443 | ||
444 | /* start with a table of all zeros: reject all */ | |
445 | memset( multicast_table, 0, sizeof( multicast_table ) ); | |
446 | ||
22bedad3 | 447 | netdev_for_each_mc_addr(ha, dev) { |
1da177e4 LT |
448 | int position; |
449 | ||
1da177e4 LT |
450 | /* make sure this is a multicast address - shouldn't this |
451 | be a given if we have it here ? */ | |
22bedad3 | 452 | if (!(*ha->addr & 1)) |
1da177e4 LT |
453 | continue; |
454 | ||
455 | /* only use the low order bits */ | |
22bedad3 | 456 | position = ether_crc_le(6, ha->addr) & 0x3f; |
1da177e4 LT |
457 | |
458 | /* do some messy swapping to put the bit in the right spot */ | |
459 | multicast_table[invert3[position&7]] |= | |
460 | (1<<invert3[(position>>3)&7]); | |
461 | ||
462 | } | |
463 | /* now, the table can be loaded into the chipset */ | |
464 | SMC_SELECT_BANK( 3 ); | |
465 | ||
466 | for ( i = 0; i < 8 ; i++ ) { | |
467 | outb( multicast_table[i], ioaddr + MULTICAST1 + i ); | |
468 | } | |
469 | } | |
470 | ||
471 | /* | |
472 | . Function: smc_wait_to_send_packet( struct sk_buff * skb, struct net_device * ) | |
473 | . Purpose: | |
474 | . Attempt to allocate memory for a packet, if chip-memory is not | |
475 | . available, then tell the card to generate an interrupt when it | |
476 | . is available. | |
477 | . | |
478 | . Algorithm: | |
479 | . | |
480 | . o if the saved_skb is not currently null, then drop this packet | |
481 | . on the floor. This should never happen, because of TBUSY. | |
482 | . o if the saved_skb is null, then replace it with the current packet, | |
483 | . o See if I can sending it now. | |
484 | . o (NO): Enable interrupts and let the interrupt handler deal with it. | |
485 | . o (YES):Send it now. | |
486 | */ | |
61357325 SH |
487 | static netdev_tx_t smc_wait_to_send_packet(struct sk_buff *skb, |
488 | struct net_device *dev) | |
1da177e4 LT |
489 | { |
490 | struct smc_local *lp = netdev_priv(dev); | |
491 | unsigned int ioaddr = dev->base_addr; | |
492 | word length; | |
493 | unsigned short numPages; | |
494 | word time_out; | |
495 | ||
496 | netif_stop_queue(dev); | |
497 | /* Well, I want to send the packet.. but I don't know | |
498 | if I can send it right now... */ | |
499 | ||
500 | if ( lp->saved_skb) { | |
501 | /* THIS SHOULD NEVER HAPPEN. */ | |
09f75cd7 | 502 | dev->stats.tx_aborted_errors++; |
1da177e4 | 503 | printk(CARDNAME": Bad Craziness - sent packet while busy.\n" ); |
5b548140 | 504 | return NETDEV_TX_BUSY; |
1da177e4 LT |
505 | } |
506 | lp->saved_skb = skb; | |
507 | ||
508 | length = skb->len; | |
509 | ||
510 | if (length < ETH_ZLEN) { | |
5b057c6b | 511 | if (skb_padto(skb, ETH_ZLEN)) { |
1da177e4 | 512 | netif_wake_queue(dev); |
6ed10654 | 513 | return NETDEV_TX_OK; |
1da177e4 LT |
514 | } |
515 | length = ETH_ZLEN; | |
516 | } | |
6aa20a22 | 517 | |
1da177e4 LT |
518 | /* |
519 | ** The MMU wants the number of pages to be the number of 256 bytes | |
520 | ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) ) | |
521 | ** | |
522 | ** Pkt size for allocating is data length +6 (for additional status words, | |
523 | ** length and ctl!) If odd size last byte is included in this header. | |
524 | */ | |
525 | numPages = ((length & 0xfffe) + 6) / 256; | |
526 | ||
527 | if (numPages > 7 ) { | |
84d57bd6 | 528 | printk(CARDNAME": Far too big packet error.\n"); |
1da177e4 LT |
529 | /* freeing the packet is a good thing here... but should |
530 | . any packets of this size get down here? */ | |
531 | dev_kfree_skb (skb); | |
532 | lp->saved_skb = NULL; | |
533 | /* this IS an error, but, i don't want the skb saved */ | |
534 | netif_wake_queue(dev); | |
6ed10654 | 535 | return NETDEV_TX_OK; |
1da177e4 LT |
536 | } |
537 | /* either way, a packet is waiting now */ | |
538 | lp->packets_waiting++; | |
539 | ||
540 | /* now, try to allocate the memory */ | |
541 | SMC_SELECT_BANK( 2 ); | |
542 | outw( MC_ALLOC | numPages, ioaddr + MMU_CMD ); | |
543 | /* | |
544 | . Performance Hack | |
545 | . | |
546 | . wait a short amount of time.. if I can send a packet now, I send | |
547 | . it now. Otherwise, I enable an interrupt and wait for one to be | |
548 | . available. | |
549 | . | |
550 | . I could have handled this a slightly different way, by checking to | |
551 | . see if any memory was available in the FREE MEMORY register. However, | |
552 | . either way, I need to generate an allocation, and the allocation works | |
553 | . no matter what, so I saw no point in checking free memory. | |
554 | */ | |
555 | time_out = MEMORY_WAIT_TIME; | |
556 | do { | |
557 | word status; | |
558 | ||
559 | status = inb( ioaddr + INTERRUPT ); | |
560 | if ( status & IM_ALLOC_INT ) { | |
561 | /* acknowledge the interrupt */ | |
562 | outb( IM_ALLOC_INT, ioaddr + INTERRUPT ); | |
563 | break; | |
564 | } | |
565 | } while ( -- time_out ); | |
566 | ||
567 | if ( !time_out ) { | |
568 | /* oh well, wait until the chip finds memory later */ | |
569 | SMC_ENABLE_INT( IM_ALLOC_INT ); | |
84d57bd6 | 570 | PRINTK2((CARDNAME": memory allocation deferred.\n")); |
1da177e4 | 571 | /* it's deferred, but I'll handle it later */ |
84d57bd6 | 572 | return NETDEV_TX_OK; |
1da177e4 LT |
573 | } |
574 | /* or YES! I can send the packet now.. */ | |
575 | smc_hardware_send_packet(dev); | |
576 | netif_wake_queue(dev); | |
6ed10654 | 577 | return NETDEV_TX_OK; |
1da177e4 LT |
578 | } |
579 | ||
580 | /* | |
581 | . Function: smc_hardware_send_packet(struct net_device * ) | |
582 | . Purpose: | |
583 | . This sends the actual packet to the SMC9xxx chip. | |
584 | . | |
585 | . Algorithm: | |
586 | . First, see if a saved_skb is available. | |
587 | . ( this should NOT be called if there is no 'saved_skb' | |
588 | . Now, find the packet number that the chip allocated | |
589 | . Point the data pointers at it in memory | |
590 | . Set the length word in the chip's memory | |
591 | . Dump the packet to chip memory | |
592 | . Check if a last byte is needed ( odd length packet ) | |
593 | . if so, set the control flag right | |
594 | . Tell the card to send it | |
595 | . Enable the transmit interrupt, so I know if it failed | |
596 | . Free the kernel data if I actually sent it. | |
597 | */ | |
598 | static void smc_hardware_send_packet( struct net_device * dev ) | |
599 | { | |
600 | struct smc_local *lp = netdev_priv(dev); | |
601 | byte packet_no; | |
602 | struct sk_buff * skb = lp->saved_skb; | |
603 | word length; | |
604 | unsigned int ioaddr; | |
605 | byte * buf; | |
606 | ||
607 | ioaddr = dev->base_addr; | |
608 | ||
609 | if ( !skb ) { | |
84d57bd6 | 610 | PRINTK((CARDNAME": In XMIT with no packet to send\n")); |
1da177e4 LT |
611 | return; |
612 | } | |
613 | length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; | |
614 | buf = skb->data; | |
615 | ||
616 | /* If I get here, I _know_ there is a packet slot waiting for me */ | |
617 | packet_no = inb( ioaddr + PNR_ARR + 1 ); | |
618 | if ( packet_no & 0x80 ) { | |
619 | /* or isn't there? BAD CHIP! */ | |
84d57bd6 | 620 | printk(KERN_DEBUG CARDNAME": Memory allocation failed.\n"); |
1da177e4 LT |
621 | dev_kfree_skb_any(skb); |
622 | lp->saved_skb = NULL; | |
623 | netif_wake_queue(dev); | |
624 | return; | |
625 | } | |
626 | ||
627 | /* we have a packet address, so tell the card to use it */ | |
628 | outb( packet_no, ioaddr + PNR_ARR ); | |
629 | ||
630 | /* point to the beginning of the packet */ | |
631 | outw( PTR_AUTOINC , ioaddr + POINTER ); | |
632 | ||
633 | PRINTK3((CARDNAME": Trying to xmit packet of length %x\n", length )); | |
634 | #if SMC_DEBUG > 2 | |
635 | print_packet( buf, length ); | |
636 | #endif | |
637 | ||
638 | /* send the packet length ( +6 for status, length and ctl byte ) | |
639 | and the status word ( set to zeros ) */ | |
640 | #ifdef USE_32_BIT | |
641 | outl( (length +6 ) << 16 , ioaddr + DATA_1 ); | |
642 | #else | |
643 | outw( 0, ioaddr + DATA_1 ); | |
644 | /* send the packet length ( +6 for status words, length, and ctl*/ | |
645 | outb( (length+6) & 0xFF,ioaddr + DATA_1 ); | |
646 | outb( (length+6) >> 8 , ioaddr + DATA_1 ); | |
647 | #endif | |
648 | ||
649 | /* send the actual data | |
650 | . I _think_ it's faster to send the longs first, and then | |
651 | . mop up by sending the last word. It depends heavily | |
652 | . on alignment, at least on the 486. Maybe it would be | |
653 | . a good idea to check which is optimal? But that could take | |
654 | . almost as much time as is saved? | |
655 | */ | |
656 | #ifdef USE_32_BIT | |
657 | if ( length & 0x2 ) { | |
658 | outsl(ioaddr + DATA_1, buf, length >> 2 ); | |
659 | #if !defined(__H8300H__) && !defined(__H8300S__) | |
660 | outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1); | |
661 | #else | |
662 | ctrl_outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1); | |
663 | #endif | |
664 | } | |
665 | else | |
666 | outsl(ioaddr + DATA_1, buf, length >> 2 ); | |
667 | #else | |
668 | outsw(ioaddr + DATA_1 , buf, (length ) >> 1); | |
669 | #endif | |
670 | /* Send the last byte, if there is one. */ | |
671 | ||
672 | if ( (length & 1) == 0 ) { | |
673 | outw( 0, ioaddr + DATA_1 ); | |
674 | } else { | |
675 | outb( buf[length -1 ], ioaddr + DATA_1 ); | |
676 | outb( 0x20, ioaddr + DATA_1); | |
677 | } | |
678 | ||
679 | /* enable the interrupts */ | |
680 | SMC_ENABLE_INT( (IM_TX_INT | IM_TX_EMPTY_INT) ); | |
681 | ||
682 | /* and let the chipset deal with it */ | |
683 | outw( MC_ENQUEUE , ioaddr + MMU_CMD ); | |
684 | ||
84d57bd6 | 685 | PRINTK2((CARDNAME": Sent packet of length %d\n", length)); |
1da177e4 LT |
686 | |
687 | lp->saved_skb = NULL; | |
688 | dev_kfree_skb_any (skb); | |
689 | ||
690 | dev->trans_start = jiffies; | |
691 | ||
692 | /* we can send another packet */ | |
693 | netif_wake_queue(dev); | |
1da177e4 LT |
694 | } |
695 | ||
696 | /*------------------------------------------------------------------------- | |
697 | | | |
698 | | smc_init(int unit) | |
699 | | Input parameters: | |
700 | | dev->base_addr == 0, try to find all possible locations | |
701 | | dev->base_addr == 1, return failure code | |
702 | | dev->base_addr == 2, always allocate space, and return success | |
703 | | dev->base_addr == <anything else> this is the address to check | |
704 | | | |
705 | | Output: | |
706 | | pointer to net_device or ERR_PTR(error) | |
707 | | | |
708 | --------------------------------------------------------------------------- | |
709 | */ | |
710 | static int io; | |
711 | static int irq; | |
712 | static int ifport; | |
713 | ||
714 | struct net_device * __init smc_init(int unit) | |
715 | { | |
716 | struct net_device *dev = alloc_etherdev(sizeof(struct smc_local)); | |
a2bd2ec8 | 717 | struct devlist *smcdev = smc_devlist; |
1da177e4 LT |
718 | int err = 0; |
719 | ||
1da177e4 LT |
720 | if (!dev) |
721 | return ERR_PTR(-ENODEV); | |
722 | ||
723 | if (unit >= 0) { | |
724 | sprintf(dev->name, "eth%d", unit); | |
725 | netdev_boot_setup_check(dev); | |
726 | io = dev->base_addr; | |
727 | irq = dev->irq; | |
728 | } | |
729 | ||
1da177e4 LT |
730 | if (io > 0x1ff) { /* Check a single specified location. */ |
731 | err = smc_probe(dev, io); | |
732 | } else if (io != 0) { /* Don't probe at all. */ | |
733 | err = -ENXIO; | |
734 | } else { | |
735 | for (;smcdev->port; smcdev++) { | |
736 | if (smc_probe(dev, smcdev->port) == 0) | |
737 | break; | |
738 | } | |
739 | if (!smcdev->port) | |
740 | err = -ENODEV; | |
741 | } | |
742 | if (err) | |
743 | goto out; | |
744 | err = register_netdev(dev); | |
745 | if (err) | |
746 | goto out1; | |
747 | return dev; | |
748 | out1: | |
749 | free_irq(dev->irq, dev); | |
750 | release_region(dev->base_addr, SMC_IO_EXTENT); | |
751 | out: | |
752 | free_netdev(dev); | |
753 | return ERR_PTR(err); | |
754 | } | |
755 | ||
756 | /*---------------------------------------------------------------------- | |
757 | . smc_findirq | |
758 | . | |
759 | . This routine has a simple purpose -- make the SMC chip generate an | |
760 | . interrupt, so an auto-detect routine can detect it, and find the IRQ, | |
761 | ------------------------------------------------------------------------ | |
762 | */ | |
dac499f9 | 763 | static int __init smc_findirq(int ioaddr) |
1da177e4 LT |
764 | { |
765 | #ifndef NO_AUTOPROBE | |
766 | int timeout = 20; | |
767 | unsigned long cookie; | |
768 | ||
769 | ||
770 | cookie = probe_irq_on(); | |
771 | ||
772 | /* | |
773 | * What I try to do here is trigger an ALLOC_INT. This is done | |
774 | * by allocating a small chunk of memory, which will give an interrupt | |
775 | * when done. | |
776 | */ | |
777 | ||
778 | ||
779 | SMC_SELECT_BANK(2); | |
780 | /* enable ALLOCation interrupts ONLY */ | |
781 | outb( IM_ALLOC_INT, ioaddr + INT_MASK ); | |
782 | ||
783 | /* | |
784 | . Allocate 512 bytes of memory. Note that the chip was just | |
785 | . reset so all the memory is available | |
786 | */ | |
787 | outw( MC_ALLOC | 1, ioaddr + MMU_CMD ); | |
788 | ||
789 | /* | |
790 | . Wait until positive that the interrupt has been generated | |
791 | */ | |
792 | while ( timeout ) { | |
793 | byte int_status; | |
794 | ||
795 | int_status = inb( ioaddr + INTERRUPT ); | |
796 | ||
797 | if ( int_status & IM_ALLOC_INT ) | |
798 | break; /* got the interrupt */ | |
799 | timeout--; | |
800 | } | |
801 | /* there is really nothing that I can do here if timeout fails, | |
802 | as probe_irq_off will return a 0 anyway, which is what I | |
803 | want in this case. Plus, the clean up is needed in both | |
804 | cases. */ | |
805 | ||
806 | /* DELAY HERE! | |
807 | On a fast machine, the status might change before the interrupt | |
808 | is given to the processor. This means that the interrupt was | |
809 | never detected, and probe_irq_off fails to report anything. | |
810 | This should fix probe_irq_* problems. | |
811 | */ | |
812 | SMC_DELAY(); | |
813 | SMC_DELAY(); | |
814 | ||
815 | /* and disable all interrupts again */ | |
816 | outb( 0, ioaddr + INT_MASK ); | |
817 | ||
818 | /* and return what I found */ | |
819 | return probe_irq_off(cookie); | |
820 | #else /* NO_AUTOPROBE */ | |
821 | struct devlist *smcdev; | |
822 | for (smcdev = smc_devlist; smcdev->port; smcdev++) { | |
823 | if (smcdev->port == ioaddr) | |
824 | return smcdev->irq; | |
825 | } | |
826 | return 0; | |
827 | #endif | |
828 | } | |
829 | ||
32670c36 SH |
830 | static const struct net_device_ops smc_netdev_ops = { |
831 | .ndo_open = smc_open, | |
832 | .ndo_stop = smc_close, | |
833 | .ndo_start_xmit = smc_wait_to_send_packet, | |
834 | .ndo_tx_timeout = smc_timeout, | |
835 | .ndo_set_multicast_list = smc_set_multicast_list, | |
836 | .ndo_change_mtu = eth_change_mtu, | |
837 | .ndo_set_mac_address = eth_mac_addr, | |
838 | .ndo_validate_addr = eth_validate_addr, | |
839 | }; | |
840 | ||
1da177e4 LT |
841 | /*---------------------------------------------------------------------- |
842 | . Function: smc_probe( int ioaddr ) | |
843 | . | |
844 | . Purpose: | |
845 | . Tests to see if a given ioaddr points to an SMC9xxx chip. | |
846 | . Returns a 0 on success | |
847 | . | |
848 | . Algorithm: | |
849 | . (1) see if the high byte of BANK_SELECT is 0x33 | |
850 | . (2) compare the ioaddr with the base register's address | |
851 | . (3) see if I recognize the chip ID in the appropriate register | |
852 | . | |
853 | .--------------------------------------------------------------------- | |
854 | */ | |
855 | ||
856 | /*--------------------------------------------------------------- | |
857 | . Here I do typical initialization tasks. | |
858 | . | |
859 | . o Initialize the structure if needed | |
860 | . o print out my vanity message if not done so already | |
861 | . o print out what type of hardware is detected | |
862 | . o print out the ethernet address | |
863 | . o find the IRQ | |
864 | . o set up my private data | |
865 | . o configure the dev structure with my subroutines | |
866 | . o actually GRAB the irq. | |
867 | . o GRAB the region | |
868 | .----------------------------------------------------------------- | |
869 | */ | |
870 | static int __init smc_probe(struct net_device *dev, int ioaddr) | |
871 | { | |
872 | int i, memory, retval; | |
873 | static unsigned version_printed; | |
874 | unsigned int bank; | |
875 | ||
876 | const char *version_string; | |
877 | const char *if_string; | |
878 | ||
879 | /* registers */ | |
880 | word revision_register; | |
881 | word base_address_register; | |
882 | word configuration_register; | |
883 | word memory_info_register; | |
884 | word memory_cfg_register; | |
885 | ||
886 | /* Grab the region so that no one else tries to probe our ioports. */ | |
887 | if (!request_region(ioaddr, SMC_IO_EXTENT, DRV_NAME)) | |
888 | return -EBUSY; | |
889 | ||
890 | dev->irq = irq; | |
891 | dev->if_port = ifport; | |
892 | ||
893 | /* First, see if the high byte is 0x33 */ | |
894 | bank = inw( ioaddr + BANK_SELECT ); | |
895 | if ( (bank & 0xFF00) != 0x3300 ) { | |
896 | retval = -ENODEV; | |
897 | goto err_out; | |
898 | } | |
899 | /* The above MIGHT indicate a device, but I need to write to further | |
900 | test this. */ | |
901 | outw( 0x0, ioaddr + BANK_SELECT ); | |
902 | bank = inw( ioaddr + BANK_SELECT ); | |
903 | if ( (bank & 0xFF00 ) != 0x3300 ) { | |
904 | retval = -ENODEV; | |
905 | goto err_out; | |
906 | } | |
907 | #if !defined(CONFIG_H8S_EDOSK2674) | |
908 | /* well, we've already written once, so hopefully another time won't | |
909 | hurt. This time, I need to switch the bank register to bank 1, | |
910 | so I can access the base address register */ | |
911 | SMC_SELECT_BANK(1); | |
912 | base_address_register = inw( ioaddr + BASE ); | |
913 | if ( ioaddr != ( base_address_register >> 3 & 0x3E0 ) ) { | |
2450022a | 914 | printk(CARDNAME ": IOADDR %x doesn't match configuration (%x). " |
1da177e4 LT |
915 | "Probably not a SMC chip\n", |
916 | ioaddr, base_address_register >> 3 & 0x3E0 ); | |
917 | /* well, the base address register didn't match. Must not have | |
918 | been a SMC chip after all. */ | |
919 | retval = -ENODEV; | |
920 | goto err_out; | |
921 | } | |
922 | #else | |
923 | (void)base_address_register; /* Warning suppression */ | |
924 | #endif | |
925 | ||
926 | ||
927 | /* check if the revision register is something that I recognize. | |
928 | These might need to be added to later, as future revisions | |
929 | could be added. */ | |
930 | SMC_SELECT_BANK(3); | |
931 | revision_register = inw( ioaddr + REVISION ); | |
932 | if ( !chip_ids[ ( revision_register >> 4 ) & 0xF ] ) { | |
933 | /* I don't recognize this chip, so... */ | |
934 | printk(CARDNAME ": IO %x: Unrecognized revision register:" | |
84d57bd6 | 935 | " %x, Contact author.\n", ioaddr, revision_register); |
1da177e4 LT |
936 | |
937 | retval = -ENODEV; | |
938 | goto err_out; | |
939 | } | |
940 | ||
941 | /* at this point I'll assume that the chip is an SMC9xxx. | |
942 | It might be prudent to check a listing of MAC addresses | |
943 | against the hardware address, or do some other tests. */ | |
944 | ||
945 | if (version_printed++ == 0) | |
946 | printk("%s", version); | |
947 | ||
948 | /* fill in some of the fields */ | |
949 | dev->base_addr = ioaddr; | |
950 | ||
951 | /* | |
952 | . Get the MAC address ( bank 1, regs 4 - 9 ) | |
953 | */ | |
954 | SMC_SELECT_BANK( 1 ); | |
955 | for ( i = 0; i < 6; i += 2 ) { | |
956 | word address; | |
957 | ||
958 | address = inw( ioaddr + ADDR0 + i ); | |
959 | dev->dev_addr[ i + 1] = address >> 8; | |
960 | dev->dev_addr[ i ] = address & 0xFF; | |
961 | } | |
962 | ||
963 | /* get the memory information */ | |
964 | ||
965 | SMC_SELECT_BANK( 0 ); | |
966 | memory_info_register = inw( ioaddr + MIR ); | |
967 | memory_cfg_register = inw( ioaddr + MCR ); | |
968 | memory = ( memory_cfg_register >> 9 ) & 0x7; /* multiplier */ | |
969 | memory *= 256 * ( memory_info_register & 0xFF ); | |
970 | ||
971 | /* | |
972 | Now, I want to find out more about the chip. This is sort of | |
973 | redundant, but it's cleaner to have it in both, rather than having | |
974 | one VERY long probe procedure. | |
975 | */ | |
976 | SMC_SELECT_BANK(3); | |
977 | revision_register = inw( ioaddr + REVISION ); | |
978 | version_string = chip_ids[ ( revision_register >> 4 ) & 0xF ]; | |
979 | if ( !version_string ) { | |
980 | /* I shouldn't get here because this call was done before.... */ | |
981 | retval = -ENODEV; | |
982 | goto err_out; | |
983 | } | |
984 | ||
985 | /* is it using AUI or 10BaseT ? */ | |
986 | if ( dev->if_port == 0 ) { | |
987 | SMC_SELECT_BANK(1); | |
988 | configuration_register = inw( ioaddr + CONFIG ); | |
989 | if ( configuration_register & CFG_AUI_SELECT ) | |
990 | dev->if_port = 2; | |
991 | else | |
992 | dev->if_port = 1; | |
993 | } | |
994 | if_string = interfaces[ dev->if_port - 1 ]; | |
995 | ||
996 | /* now, reset the chip, and put it into a known state */ | |
997 | smc_reset( ioaddr ); | |
998 | ||
999 | /* | |
1000 | . If dev->irq is 0, then the device has to be banged on to see | |
1001 | . what the IRQ is. | |
1002 | . | |
1003 | . This banging doesn't always detect the IRQ, for unknown reasons. | |
1004 | . a workaround is to reset the chip and try again. | |
1005 | . | |
1006 | . Interestingly, the DOS packet driver *SETS* the IRQ on the card to | |
1007 | . be what is requested on the command line. I don't do that, mostly | |
1008 | . because the card that I have uses a non-standard method of accessing | |
1009 | . the IRQs, and because this _should_ work in most configurations. | |
1010 | . | |
1011 | . Specifying an IRQ is done with the assumption that the user knows | |
1012 | . what (s)he is doing. No checking is done!!!! | |
1013 | . | |
1014 | */ | |
1015 | if ( dev->irq < 2 ) { | |
1016 | int trials; | |
1017 | ||
1018 | trials = 3; | |
1019 | while ( trials-- ) { | |
1020 | dev->irq = smc_findirq( ioaddr ); | |
1021 | if ( dev->irq ) | |
1022 | break; | |
1023 | /* kick the card and try again */ | |
1024 | smc_reset( ioaddr ); | |
1025 | } | |
1026 | } | |
1027 | if (dev->irq == 0 ) { | |
1028 | printk(CARDNAME": Couldn't autodetect your IRQ. Use irq=xx.\n"); | |
1029 | retval = -ENODEV; | |
1030 | goto err_out; | |
1031 | } | |
1032 | ||
1033 | /* now, print out the card info, in a short format.. */ | |
1034 | ||
1035 | printk("%s: %s(r:%d) at %#3x IRQ:%d INTF:%s MEM:%db ", dev->name, | |
1036 | version_string, revision_register & 0xF, ioaddr, dev->irq, | |
1037 | if_string, memory ); | |
1038 | /* | |
1039 | . Print the Ethernet address | |
1040 | */ | |
e174961c | 1041 | printk("ADDR: %pM\n", dev->dev_addr); |
1da177e4 | 1042 | |
1da177e4 | 1043 | /* Grab the IRQ */ |
a0607fd3 | 1044 | retval = request_irq(dev->irq, smc_interrupt, 0, DRV_NAME, dev); |
1da177e4 LT |
1045 | if (retval) { |
1046 | printk("%s: unable to get IRQ %d (irqval=%d).\n", DRV_NAME, | |
1047 | dev->irq, retval); | |
1048 | goto err_out; | |
1049 | } | |
1050 | ||
32670c36 | 1051 | dev->netdev_ops = &smc_netdev_ops; |
1da177e4 | 1052 | dev->watchdog_timeo = HZ/20; |
1da177e4 LT |
1053 | |
1054 | return 0; | |
1055 | ||
1056 | err_out: | |
1057 | release_region(ioaddr, SMC_IO_EXTENT); | |
1058 | return retval; | |
1059 | } | |
1060 | ||
1061 | #if SMC_DEBUG > 2 | |
1062 | static void print_packet( byte * buf, int length ) | |
1063 | { | |
1064 | #if 0 | |
1065 | int i; | |
1066 | int remainder; | |
1067 | int lines; | |
1068 | ||
84d57bd6 | 1069 | printk("Packet of length %d\n", length); |
1da177e4 LT |
1070 | lines = length / 16; |
1071 | remainder = length % 16; | |
1072 | ||
1073 | for ( i = 0; i < lines ; i ++ ) { | |
1074 | int cur; | |
1075 | ||
1076 | for ( cur = 0; cur < 8; cur ++ ) { | |
1077 | byte a, b; | |
1078 | ||
1079 | a = *(buf ++ ); | |
1080 | b = *(buf ++ ); | |
1081 | printk("%02x%02x ", a, b ); | |
1082 | } | |
1083 | printk("\n"); | |
1084 | } | |
1085 | for ( i = 0; i < remainder/2 ; i++ ) { | |
1086 | byte a, b; | |
1087 | ||
1088 | a = *(buf ++ ); | |
1089 | b = *(buf ++ ); | |
1090 | printk("%02x%02x ", a, b ); | |
1091 | } | |
1092 | printk("\n"); | |
1093 | #endif | |
1094 | } | |
1095 | #endif | |
1096 | ||
1097 | ||
1098 | /* | |
1099 | * Open and Initialize the board | |
1100 | * | |
1101 | * Set up everything, reset the card, etc .. | |
1102 | * | |
1103 | */ | |
1104 | static int smc_open(struct net_device *dev) | |
1105 | { | |
1106 | int ioaddr = dev->base_addr; | |
1107 | ||
1108 | int i; /* used to set hw ethernet address */ | |
1109 | ||
1110 | /* clear out all the junk that was put here before... */ | |
8f15ea42 | 1111 | memset(netdev_priv(dev), 0, sizeof(struct smc_local)); |
1da177e4 LT |
1112 | |
1113 | /* reset the hardware */ | |
1114 | ||
1115 | smc_reset( ioaddr ); | |
1116 | smc_enable( ioaddr ); | |
1117 | ||
1118 | /* Select which interface to use */ | |
1119 | ||
1120 | SMC_SELECT_BANK( 1 ); | |
1121 | if ( dev->if_port == 1 ) { | |
1122 | outw( inw( ioaddr + CONFIG ) & ~CFG_AUI_SELECT, | |
1123 | ioaddr + CONFIG ); | |
1124 | } | |
1125 | else if ( dev->if_port == 2 ) { | |
1126 | outw( inw( ioaddr + CONFIG ) | CFG_AUI_SELECT, | |
1127 | ioaddr + CONFIG ); | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | According to Becker, I have to set the hardware address | |
1132 | at this point, because the (l)user can set it with an | |
1133 | ioctl. Easily done... | |
1134 | */ | |
1135 | SMC_SELECT_BANK( 1 ); | |
1136 | for ( i = 0; i < 6; i += 2 ) { | |
1137 | word address; | |
1138 | ||
1139 | address = dev->dev_addr[ i + 1 ] << 8 ; | |
1140 | address |= dev->dev_addr[ i ]; | |
1141 | outw( address, ioaddr + ADDR0 + i ); | |
1142 | } | |
6aa20a22 | 1143 | |
1da177e4 LT |
1144 | netif_start_queue(dev); |
1145 | return 0; | |
1146 | } | |
1147 | ||
1148 | /*-------------------------------------------------------- | |
1149 | . Called by the kernel to send a packet out into the void | |
1150 | . of the net. This routine is largely based on | |
1151 | . skeleton.c, from Becker. | |
1152 | .-------------------------------------------------------- | |
1153 | */ | |
1154 | ||
1155 | static void smc_timeout(struct net_device *dev) | |
1156 | { | |
1157 | /* If we get here, some higher level has decided we are broken. | |
1158 | There should really be a "kick me" function call instead. */ | |
1159 | printk(KERN_WARNING CARDNAME": transmit timed out, %s?\n", | |
1160 | tx_done(dev) ? "IRQ conflict" : | |
1161 | "network cable problem"); | |
1162 | /* "kick" the adaptor */ | |
1163 | smc_reset( dev->base_addr ); | |
1164 | smc_enable( dev->base_addr ); | |
1ae5dc34 | 1165 | dev->trans_start = jiffies; /* prevent tx timeout */ |
1da177e4 | 1166 | /* clear anything saved */ |
8f15ea42 | 1167 | ((struct smc_local *)netdev_priv(dev))->saved_skb = NULL; |
1da177e4 LT |
1168 | netif_wake_queue(dev); |
1169 | } | |
1170 | ||
1171 | /*------------------------------------------------------------- | |
1172 | . | |
1173 | . smc_rcv - receive a packet from the card | |
1174 | . | |
1175 | . There is ( at least ) a packet waiting to be read from | |
1176 | . chip-memory. | |
1177 | . | |
1178 | . o Read the status | |
1179 | . o If an error, record it | |
1180 | . o otherwise, read in the packet | |
1181 | -------------------------------------------------------------- | |
1182 | */ | |
1183 | static void smc_rcv(struct net_device *dev) | |
1184 | { | |
1da177e4 LT |
1185 | int ioaddr = dev->base_addr; |
1186 | int packet_number; | |
1187 | word status; | |
1188 | word packet_length; | |
1189 | ||
1190 | /* assume bank 2 */ | |
1191 | ||
1192 | packet_number = inw( ioaddr + FIFO_PORTS ); | |
1193 | ||
1194 | if ( packet_number & FP_RXEMPTY ) { | |
1195 | /* we got called , but nothing was on the FIFO */ | |
84d57bd6 | 1196 | PRINTK((CARDNAME ": WARNING: smc_rcv with nothing on FIFO.\n")); |
1da177e4 LT |
1197 | /* don't need to restore anything */ |
1198 | return; | |
1199 | } | |
1200 | ||
1201 | /* start reading from the start of the packet */ | |
1202 | outw( PTR_READ | PTR_RCV | PTR_AUTOINC, ioaddr + POINTER ); | |
1203 | ||
1204 | /* First two words are status and packet_length */ | |
1205 | status = inw( ioaddr + DATA_1 ); | |
1206 | packet_length = inw( ioaddr + DATA_1 ); | |
1207 | ||
1208 | packet_length &= 0x07ff; /* mask off top bits */ | |
1209 | ||
1210 | PRINTK2(("RCV: STATUS %4x LENGTH %4x\n", status, packet_length )); | |
1211 | /* | |
1212 | . the packet length contains 3 extra words : | |
1213 | . status, length, and an extra word with an odd byte . | |
1214 | */ | |
1215 | packet_length -= 6; | |
1216 | ||
1217 | if ( !(status & RS_ERRORS ) ){ | |
1218 | /* do stuff to make a new packet */ | |
1219 | struct sk_buff * skb; | |
1220 | byte * data; | |
1221 | ||
1222 | /* read one extra byte */ | |
1223 | if ( status & RS_ODDFRAME ) | |
1224 | packet_length++; | |
1225 | ||
1226 | /* set multicast stats */ | |
1227 | if ( status & RS_MULTICAST ) | |
09f75cd7 | 1228 | dev->stats.multicast++; |
1da177e4 LT |
1229 | |
1230 | skb = dev_alloc_skb( packet_length + 5); | |
1231 | ||
1232 | if ( skb == NULL ) { | |
1233 | printk(KERN_NOTICE CARDNAME ": Low memory, packet dropped.\n"); | |
09f75cd7 | 1234 | dev->stats.rx_dropped++; |
1da177e4 LT |
1235 | goto done; |
1236 | } | |
1237 | ||
1238 | /* | |
1239 | ! This should work without alignment, but it could be | |
1240 | ! in the worse case | |
1241 | */ | |
1242 | ||
1243 | skb_reserve( skb, 2 ); /* 16 bit alignment */ | |
1244 | ||
1da177e4 LT |
1245 | data = skb_put( skb, packet_length); |
1246 | ||
1247 | #ifdef USE_32_BIT | |
1248 | /* QUESTION: Like in the TX routine, do I want | |
1249 | to send the DWORDs or the bytes first, or some | |
1250 | mixture. A mixture might improve already slow PIO | |
1251 | performance */ | |
84d57bd6 | 1252 | PRINTK3((" Reading %d dwords (and %d bytes)\n", |
1da177e4 LT |
1253 | packet_length >> 2, packet_length & 3 )); |
1254 | insl(ioaddr + DATA_1 , data, packet_length >> 2 ); | |
1255 | /* read the left over bytes */ | |
1256 | insb( ioaddr + DATA_1, data + (packet_length & 0xFFFFFC), | |
1257 | packet_length & 0x3 ); | |
1258 | #else | |
84d57bd6 | 1259 | PRINTK3((" Reading %d words and %d byte(s)\n", |
1da177e4 LT |
1260 | (packet_length >> 1 ), packet_length & 1 )); |
1261 | insw(ioaddr + DATA_1 , data, packet_length >> 1); | |
1262 | if ( packet_length & 1 ) { | |
1263 | data += packet_length & ~1; | |
1264 | *(data++) = inb( ioaddr + DATA_1 ); | |
1265 | } | |
1266 | #endif | |
1267 | #if SMC_DEBUG > 2 | |
1268 | print_packet( data, packet_length ); | |
1269 | #endif | |
1270 | ||
1271 | skb->protocol = eth_type_trans(skb, dev ); | |
1272 | netif_rx(skb); | |
09f75cd7 JG |
1273 | dev->stats.rx_packets++; |
1274 | dev->stats.rx_bytes += packet_length; | |
1da177e4 LT |
1275 | } else { |
1276 | /* error ... */ | |
09f75cd7 | 1277 | dev->stats.rx_errors++; |
1da177e4 | 1278 | |
09f75cd7 | 1279 | if ( status & RS_ALGNERR ) dev->stats.rx_frame_errors++; |
1da177e4 | 1280 | if ( status & (RS_TOOSHORT | RS_TOOLONG ) ) |
09f75cd7 JG |
1281 | dev->stats.rx_length_errors++; |
1282 | if ( status & RS_BADCRC) dev->stats.rx_crc_errors++; | |
1da177e4 LT |
1283 | } |
1284 | ||
1285 | done: | |
1286 | /* error or good, tell the card to get rid of this packet */ | |
1287 | outw( MC_RELEASE, ioaddr + MMU_CMD ); | |
1288 | } | |
1289 | ||
1290 | ||
1291 | /************************************************************************* | |
1292 | . smc_tx | |
1293 | . | |
1294 | . Purpose: Handle a transmit error message. This will only be called | |
1295 | . when an error, because of the AUTO_RELEASE mode. | |
1296 | . | |
1297 | . Algorithm: | |
1298 | . Save pointer and packet no | |
1299 | . Get the packet no from the top of the queue | |
1300 | . check if it's valid ( if not, is this an error??? ) | |
1301 | . read the status word | |
1302 | . record the error | |
1303 | . ( resend? Not really, since we don't want old packets around ) | |
1304 | . Restore saved values | |
1305 | ************************************************************************/ | |
1306 | static void smc_tx( struct net_device * dev ) | |
1307 | { | |
1308 | int ioaddr = dev->base_addr; | |
1309 | struct smc_local *lp = netdev_priv(dev); | |
1310 | byte saved_packet; | |
1311 | byte packet_no; | |
1312 | word tx_status; | |
1313 | ||
1314 | ||
1315 | /* assume bank 2 */ | |
1316 | ||
1317 | saved_packet = inb( ioaddr + PNR_ARR ); | |
1318 | packet_no = inw( ioaddr + FIFO_PORTS ); | |
1319 | packet_no &= 0x7F; | |
1320 | ||
1321 | /* select this as the packet to read from */ | |
1322 | outb( packet_no, ioaddr + PNR_ARR ); | |
1323 | ||
1324 | /* read the first word from this packet */ | |
1325 | outw( PTR_AUTOINC | PTR_READ, ioaddr + POINTER ); | |
1326 | ||
1327 | tx_status = inw( ioaddr + DATA_1 ); | |
84d57bd6 | 1328 | PRINTK3((CARDNAME": TX DONE STATUS: %4x\n", tx_status)); |
1da177e4 | 1329 | |
09f75cd7 JG |
1330 | dev->stats.tx_errors++; |
1331 | if ( tx_status & TS_LOSTCAR ) dev->stats.tx_carrier_errors++; | |
1da177e4 LT |
1332 | if ( tx_status & TS_LATCOL ) { |
1333 | printk(KERN_DEBUG CARDNAME | |
1334 | ": Late collision occurred on last xmit.\n"); | |
09f75cd7 | 1335 | dev->stats.tx_window_errors++; |
1da177e4 LT |
1336 | } |
1337 | #if 0 | |
1338 | if ( tx_status & TS_16COL ) { ... } | |
1339 | #endif | |
1340 | ||
1341 | if ( tx_status & TS_SUCCESS ) { | |
84d57bd6 | 1342 | printk(CARDNAME": Successful packet caused interrupt\n"); |
1da177e4 LT |
1343 | } |
1344 | /* re-enable transmit */ | |
1345 | SMC_SELECT_BANK( 0 ); | |
1346 | outw( inw( ioaddr + TCR ) | TCR_ENABLE, ioaddr + TCR ); | |
1347 | ||
1348 | /* kill the packet */ | |
1349 | SMC_SELECT_BANK( 2 ); | |
1350 | outw( MC_FREEPKT, ioaddr + MMU_CMD ); | |
1351 | ||
1352 | /* one less packet waiting for me */ | |
1353 | lp->packets_waiting--; | |
1354 | ||
1355 | outb( saved_packet, ioaddr + PNR_ARR ); | |
1da177e4 LT |
1356 | } |
1357 | ||
1358 | /*-------------------------------------------------------------------- | |
1359 | . | |
1360 | . This is the main routine of the driver, to handle the device when | |
1361 | . it needs some attention. | |
1362 | . | |
1363 | . So: | |
1364 | . first, save state of the chipset | |
1365 | . branch off into routines to handle each case, and acknowledge | |
1366 | . each to the interrupt register | |
1367 | . and finally restore state. | |
1368 | . | |
1369 | ---------------------------------------------------------------------*/ | |
1370 | ||
7d12e780 | 1371 | static irqreturn_t smc_interrupt(int irq, void * dev_id) |
1da177e4 LT |
1372 | { |
1373 | struct net_device *dev = dev_id; | |
1374 | int ioaddr = dev->base_addr; | |
1375 | struct smc_local *lp = netdev_priv(dev); | |
1376 | ||
1377 | byte status; | |
1378 | word card_stats; | |
1379 | byte mask; | |
1380 | int timeout; | |
1381 | /* state registers */ | |
1382 | word saved_bank; | |
1383 | word saved_pointer; | |
1384 | int handled = 0; | |
1385 | ||
1386 | ||
84d57bd6 | 1387 | PRINTK3((CARDNAME": SMC interrupt started\n")); |
1da177e4 LT |
1388 | |
1389 | saved_bank = inw( ioaddr + BANK_SELECT ); | |
1390 | ||
1391 | SMC_SELECT_BANK(2); | |
1392 | saved_pointer = inw( ioaddr + POINTER ); | |
1393 | ||
1394 | mask = inb( ioaddr + INT_MASK ); | |
1395 | /* clear all interrupts */ | |
1396 | outb( 0, ioaddr + INT_MASK ); | |
1397 | ||
1398 | ||
1399 | /* set a timeout value, so I don't stay here forever */ | |
1400 | timeout = 4; | |
1401 | ||
84d57bd6 | 1402 | PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x\n", mask)); |
1da177e4 LT |
1403 | do { |
1404 | /* read the status flag, and mask it */ | |
1405 | status = inb( ioaddr + INTERRUPT ) & mask; | |
1406 | if (!status ) | |
1407 | break; | |
1408 | ||
1409 | handled = 1; | |
1410 | ||
1411 | PRINTK3((KERN_WARNING CARDNAME | |
84d57bd6 | 1412 | ": Handling interrupt status %x\n", status)); |
1da177e4 LT |
1413 | |
1414 | if (status & IM_RCV_INT) { | |
1415 | /* Got a packet(s). */ | |
1416 | PRINTK2((KERN_WARNING CARDNAME | |
1417 | ": Receive Interrupt\n")); | |
1418 | smc_rcv(dev); | |
1419 | } else if (status & IM_TX_INT ) { | |
1420 | PRINTK2((KERN_WARNING CARDNAME | |
1421 | ": TX ERROR handled\n")); | |
1422 | smc_tx(dev); | |
1423 | outb(IM_TX_INT, ioaddr + INTERRUPT ); | |
1424 | } else if (status & IM_TX_EMPTY_INT ) { | |
1425 | /* update stats */ | |
1426 | SMC_SELECT_BANK( 0 ); | |
1427 | card_stats = inw( ioaddr + COUNTER ); | |
1428 | /* single collisions */ | |
09f75cd7 | 1429 | dev->stats.collisions += card_stats & 0xF; |
1da177e4 LT |
1430 | card_stats >>= 4; |
1431 | /* multiple collisions */ | |
09f75cd7 | 1432 | dev->stats.collisions += card_stats & 0xF; |
1da177e4 LT |
1433 | |
1434 | /* these are for when linux supports these statistics */ | |
1435 | ||
1436 | SMC_SELECT_BANK( 2 ); | |
1437 | PRINTK2((KERN_WARNING CARDNAME | |
1438 | ": TX_BUFFER_EMPTY handled\n")); | |
1439 | outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT ); | |
1440 | mask &= ~IM_TX_EMPTY_INT; | |
09f75cd7 | 1441 | dev->stats.tx_packets += lp->packets_waiting; |
1da177e4 LT |
1442 | lp->packets_waiting = 0; |
1443 | ||
1444 | } else if (status & IM_ALLOC_INT ) { | |
1445 | PRINTK2((KERN_DEBUG CARDNAME | |
84d57bd6 | 1446 | ": Allocation interrupt\n")); |
1da177e4 LT |
1447 | /* clear this interrupt so it doesn't happen again */ |
1448 | mask &= ~IM_ALLOC_INT; | |
1449 | ||
1450 | smc_hardware_send_packet( dev ); | |
1451 | ||
1452 | /* enable xmit interrupts based on this */ | |
1453 | mask |= ( IM_TX_EMPTY_INT | IM_TX_INT ); | |
1454 | ||
1455 | /* and let the card send more packets to me */ | |
1456 | netif_wake_queue(dev); | |
1457 | ||
1458 | PRINTK2((CARDNAME": Handoff done successfully.\n")); | |
1459 | } else if (status & IM_RX_OVRN_INT ) { | |
09f75cd7 JG |
1460 | dev->stats.rx_errors++; |
1461 | dev->stats.rx_fifo_errors++; | |
1da177e4 LT |
1462 | outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT ); |
1463 | } else if (status & IM_EPH_INT ) { | |
84d57bd6 | 1464 | PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT\n")); |
1da177e4 | 1465 | } else if (status & IM_ERCV_INT ) { |
84d57bd6 | 1466 | PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT\n")); |
1da177e4 LT |
1467 | outb( IM_ERCV_INT, ioaddr + INTERRUPT ); |
1468 | } | |
1469 | } while ( timeout -- ); | |
1470 | ||
1471 | ||
1472 | /* restore state register */ | |
1473 | SMC_SELECT_BANK( 2 ); | |
1474 | outb( mask, ioaddr + INT_MASK ); | |
1475 | ||
84d57bd6 | 1476 | PRINTK3((KERN_WARNING CARDNAME ": MASK is now %x\n", mask)); |
1da177e4 LT |
1477 | outw( saved_pointer, ioaddr + POINTER ); |
1478 | ||
1479 | SMC_SELECT_BANK( saved_bank ); | |
1480 | ||
1481 | PRINTK3((CARDNAME ": Interrupt done\n")); | |
1482 | return IRQ_RETVAL(handled); | |
1483 | } | |
1484 | ||
1485 | ||
1486 | /*---------------------------------------------------- | |
1487 | . smc_close | |
1488 | . | |
1489 | . this makes the board clean up everything that it can | |
1490 | . and not talk to the outside world. Caused by | |
1491 | . an 'ifconfig ethX down' | |
1492 | . | |
1493 | -----------------------------------------------------*/ | |
1494 | static int smc_close(struct net_device *dev) | |
1495 | { | |
1496 | netif_stop_queue(dev); | |
1497 | /* clear everything */ | |
1498 | smc_shutdown( dev->base_addr ); | |
1499 | ||
1500 | /* Update the statistics here. */ | |
1501 | return 0; | |
1502 | } | |
1503 | ||
1da177e4 LT |
1504 | /*----------------------------------------------------------- |
1505 | . smc_set_multicast_list | |
1506 | . | |
1507 | . This routine will, depending on the values passed to it, | |
1508 | . either make it accept multicast packets, go into | |
1509 | . promiscuous mode ( for TCPDUMP and cousins ) or accept | |
1510 | . a select set of multicast packets | |
1511 | */ | |
1512 | static void smc_set_multicast_list(struct net_device *dev) | |
1513 | { | |
1514 | short ioaddr = dev->base_addr; | |
1515 | ||
1516 | SMC_SELECT_BANK(0); | |
1517 | if ( dev->flags & IFF_PROMISC ) | |
1518 | outw( inw(ioaddr + RCR ) | RCR_PROMISC, ioaddr + RCR ); | |
1519 | ||
1520 | /* BUG? I never disable promiscuous mode if multicasting was turned on. | |
1521 | Now, I turn off promiscuous mode, but I don't do anything to multicasting | |
1522 | when promiscuous mode is turned on. | |
1523 | */ | |
1524 | ||
1525 | /* Here, I am setting this to accept all multicast packets. | |
1526 | I don't need to zero the multicast table, because the flag is | |
1527 | checked before the table is | |
1528 | */ | |
1529 | else if (dev->flags & IFF_ALLMULTI) | |
1530 | outw( inw(ioaddr + RCR ) | RCR_ALMUL, ioaddr + RCR ); | |
1531 | ||
1532 | /* We just get all multicast packets even if we only want them | |
1533 | . from one source. This will be changed at some future | |
1534 | . point. */ | |
4cd24eaf | 1535 | else if (!netdev_mc_empty(dev)) { |
1da177e4 LT |
1536 | /* support hardware multicasting */ |
1537 | ||
1538 | /* be sure I get rid of flags I might have set */ | |
1539 | outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL), | |
1540 | ioaddr + RCR ); | |
1541 | /* NOTE: this has to set the bank, so make sure it is the | |
1542 | last thing called. The bank is set to zero at the top */ | |
567ec874 | 1543 | smc_setmulticast(ioaddr, dev); |
1da177e4 LT |
1544 | } |
1545 | else { | |
1546 | outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL), | |
1547 | ioaddr + RCR ); | |
1548 | ||
1549 | /* | |
1550 | since I'm disabling all multicast entirely, I need to | |
1551 | clear the multicast list | |
1552 | */ | |
1553 | SMC_SELECT_BANK( 3 ); | |
1554 | outw( 0, ioaddr + MULTICAST1 ); | |
1555 | outw( 0, ioaddr + MULTICAST2 ); | |
1556 | outw( 0, ioaddr + MULTICAST3 ); | |
1557 | outw( 0, ioaddr + MULTICAST4 ); | |
1558 | } | |
1559 | } | |
1560 | ||
1561 | #ifdef MODULE | |
1562 | ||
1563 | static struct net_device *devSMC9194; | |
1564 | MODULE_LICENSE("GPL"); | |
1565 | ||
1566 | module_param(io, int, 0); | |
1567 | module_param(irq, int, 0); | |
1568 | module_param(ifport, int, 0); | |
1569 | MODULE_PARM_DESC(io, "SMC 99194 I/O base address"); | |
1570 | MODULE_PARM_DESC(irq, "SMC 99194 IRQ number"); | |
1571 | MODULE_PARM_DESC(ifport, "SMC 99194 interface port (0-default, 1-TP, 2-AUI)"); | |
1572 | ||
a2bd2ec8 | 1573 | int __init init_module(void) |
1da177e4 LT |
1574 | { |
1575 | if (io == 0) | |
1576 | printk(KERN_WARNING | |
1577 | CARDNAME": You shouldn't use auto-probing with insmod!\n" ); | |
1578 | ||
1579 | /* copy the parameters from insmod into the device structure */ | |
1580 | devSMC9194 = smc_init(-1); | |
1581 | if (IS_ERR(devSMC9194)) | |
1582 | return PTR_ERR(devSMC9194); | |
1583 | return 0; | |
1584 | } | |
1585 | ||
afc8eb46 | 1586 | void __exit cleanup_module(void) |
1da177e4 LT |
1587 | { |
1588 | unregister_netdev(devSMC9194); | |
1589 | free_irq(devSMC9194->irq, devSMC9194); | |
1590 | release_region(devSMC9194->base_addr, SMC_IO_EXTENT); | |
1591 | free_netdev(devSMC9194); | |
1592 | } | |
1593 | ||
1594 | #endif /* MODULE */ |