Commit | Line | Data |
---|---|---|
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[] = | |
2ad02bdc | 58 | "smc9194.c:v0.14 12/15/00 by Erik Stahlman (erik@vt.edu)"; |
1da177e4 LT |
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 | ||
1da177e4 LT |
98 | /* |
99 | .the SMC9194 can be at any of the following port addresses. To change, | |
100 | .for a slightly different card, you can add it to the array. Keep in | |
101 | .mind that the array must end in zero. | |
102 | */ | |
103 | ||
104 | struct devlist { | |
105 | unsigned int port; | |
106 | unsigned int irq; | |
107 | }; | |
108 | ||
1da177e4 LT |
109 | static struct devlist smc_devlist[] __initdata = { |
110 | {.port = 0x200, .irq = 0}, | |
111 | {.port = 0x220, .irq = 0}, | |
112 | {.port = 0x240, .irq = 0}, | |
113 | {.port = 0x260, .irq = 0}, | |
114 | {.port = 0x280, .irq = 0}, | |
115 | {.port = 0x2A0, .irq = 0}, | |
116 | {.port = 0x2C0, .irq = 0}, | |
117 | {.port = 0x2E0, .irq = 0}, | |
118 | {.port = 0x300, .irq = 0}, | |
119 | {.port = 0x320, .irq = 0}, | |
120 | {.port = 0x340, .irq = 0}, | |
121 | {.port = 0x360, .irq = 0}, | |
122 | {.port = 0x380, .irq = 0}, | |
123 | {.port = 0x3A0, .irq = 0}, | |
124 | {.port = 0x3C0, .irq = 0}, | |
125 | {.port = 0x3E0, .irq = 0}, | |
126 | {.port = 0, .irq = 0}, | |
127 | }; | |
1da177e4 LT |
128 | /* |
129 | . Wait time for memory to be free. This probably shouldn't be | |
130 | . tuned that much, as waiting for this means nothing else happens | |
131 | . in the system | |
132 | */ | |
133 | #define MEMORY_WAIT_TIME 16 | |
134 | ||
135 | /* | |
136 | . DEBUGGING LEVELS | |
137 | . | |
138 | . 0 for normal operation | |
139 | . 1 for slightly more details | |
140 | . >2 for various levels of increasingly useless information | |
141 | . 2 for interrupt tracking, status flags | |
142 | . 3 for packet dumps, etc. | |
143 | */ | |
144 | #define SMC_DEBUG 0 | |
145 | ||
146 | #if (SMC_DEBUG > 2 ) | |
147 | #define PRINTK3(x) printk x | |
148 | #else | |
149 | #define PRINTK3(x) | |
150 | #endif | |
151 | ||
152 | #if SMC_DEBUG > 1 | |
153 | #define PRINTK2(x) printk x | |
154 | #else | |
155 | #define PRINTK2(x) | |
156 | #endif | |
157 | ||
158 | #ifdef SMC_DEBUG | |
159 | #define PRINTK(x) printk x | |
160 | #else | |
161 | #define PRINTK(x) | |
162 | #endif | |
163 | ||
164 | ||
165 | /*------------------------------------------------------------------------ | |
166 | . | |
167 | . The internal workings of the driver. If you are changing anything | |
168 | . here with the SMC stuff, you should have the datasheet and known | |
169 | . what you are doing. | |
170 | . | |
171 | -------------------------------------------------------------------------*/ | |
172 | #define CARDNAME "SMC9194" | |
173 | ||
174 | ||
175 | /* store this information for the driver.. */ | |
176 | struct smc_local { | |
1da177e4 LT |
177 | /* |
178 | If I have to wait until memory is available to send | |
179 | a packet, I will store the skbuff here, until I get the | |
180 | desired memory. Then, I'll send it out and free it. | |
181 | */ | |
182 | struct sk_buff * saved_skb; | |
183 | ||
184 | /* | |
185 | . This keeps track of how many packets that I have | |
186 | . sent out. When an TX_EMPTY interrupt comes, I know | |
187 | . that all of these have been sent. | |
188 | */ | |
189 | int packets_waiting; | |
190 | }; | |
191 | ||
192 | ||
193 | /*----------------------------------------------------------------- | |
194 | . | |
195 | . The driver can be entered at any of the following entry points. | |
196 | . | |
197 | .------------------------------------------------------------------ */ | |
198 | ||
199 | /* | |
200 | . This is called by register_netdev(). It is responsible for | |
201 | . checking the portlist for the SMC9000 series chipset. If it finds | |
202 | . one, then it will initialize the device, find the hardware information, | |
203 | . and sets up the appropriate device parameters. | |
204 | . NOTE: Interrupts are *OFF* when this procedure is called. | |
205 | . | |
206 | . NB:This shouldn't be static since it is referred to externally. | |
207 | */ | |
208 | struct net_device *smc_init(int unit); | |
209 | ||
210 | /* | |
211 | . The kernel calls this function when someone wants to use the device, | |
212 | . typically 'ifconfig ethX up'. | |
213 | */ | |
214 | static int smc_open(struct net_device *dev); | |
215 | ||
216 | /* | |
217 | . Our watchdog timed out. Called by the networking layer | |
218 | */ | |
219 | static void smc_timeout(struct net_device *dev); | |
220 | ||
221 | /* | |
222 | . This is called by the kernel in response to 'ifconfig ethX down'. It | |
223 | . is responsible for cleaning up everything that the open routine | |
224 | . does, and maybe putting the card into a powerdown state. | |
225 | */ | |
226 | static int smc_close(struct net_device *dev); | |
227 | ||
1da177e4 LT |
228 | /* |
229 | . Finally, a call to set promiscuous mode ( for TCPDUMP and related | |
230 | . programs ) and multicast modes. | |
231 | */ | |
232 | static void smc_set_multicast_list(struct net_device *dev); | |
233 | ||
234 | ||
235 | /*--------------------------------------------------------------- | |
236 | . | |
237 | . Interrupt level calls.. | |
238 | . | |
239 | ----------------------------------------------------------------*/ | |
240 | ||
241 | /* | |
242 | . Handles the actual interrupt | |
243 | */ | |
7d12e780 | 244 | static irqreturn_t smc_interrupt(int irq, void *); |
1da177e4 LT |
245 | /* |
246 | . This is a separate procedure to handle the receipt of a packet, to | |
247 | . leave the interrupt code looking slightly cleaner | |
248 | */ | |
249 | static inline void smc_rcv( struct net_device *dev ); | |
250 | /* | |
251 | . This handles a TX interrupt, which is only called when an error | |
252 | . relating to a packet is sent. | |
253 | */ | |
254 | static inline void smc_tx( struct net_device * dev ); | |
255 | ||
256 | /* | |
257 | ------------------------------------------------------------ | |
258 | . | |
259 | . Internal routines | |
260 | . | |
261 | ------------------------------------------------------------ | |
262 | */ | |
263 | ||
264 | /* | |
265 | . Test if a given location contains a chip, trying to cause as | |
266 | . little damage as possible if it's not a SMC chip. | |
267 | */ | |
268 | static int smc_probe(struct net_device *dev, int ioaddr); | |
269 | ||
270 | /* | |
271 | . A rather simple routine to print out a packet for debugging purposes. | |
272 | */ | |
273 | #if SMC_DEBUG > 2 | |
274 | static void print_packet( byte *, int ); | |
275 | #endif | |
276 | ||
277 | #define tx_done(dev) 1 | |
278 | ||
279 | /* this is called to actually send the packet to the chip */ | |
280 | static void smc_hardware_send_packet( struct net_device * dev ); | |
281 | ||
282 | /* Since I am not sure if I will have enough room in the chip's ram | |
283 | . to store the packet, I call this routine, which either sends it | |
284 | . now, or generates an interrupt when the card is ready for the | |
285 | . packet */ | |
61357325 SH |
286 | static netdev_tx_t smc_wait_to_send_packet( struct sk_buff * skb, |
287 | struct net_device *dev ); | |
1da177e4 LT |
288 | |
289 | /* this does a soft reset on the device */ | |
290 | static void smc_reset( int ioaddr ); | |
291 | ||
292 | /* Enable Interrupts, Receive, and Transmit */ | |
293 | static void smc_enable( int ioaddr ); | |
294 | ||
295 | /* this puts the device in an inactive state */ | |
296 | static void smc_shutdown( int ioaddr ); | |
297 | ||
298 | /* This routine will find the IRQ of the driver if one is not | |
299 | . specified in the input to the device. */ | |
300 | static int smc_findirq( int ioaddr ); | |
301 | ||
302 | /* | |
303 | . Function: smc_reset( int ioaddr ) | |
304 | . Purpose: | |
305 | . This sets the SMC91xx chip to its normal state, hopefully from whatever | |
306 | . mess that any other DOS driver has put it in. | |
307 | . | |
308 | . Maybe I should reset more registers to defaults in here? SOFTRESET should | |
309 | . do that for me. | |
310 | . | |
311 | . Method: | |
312 | . 1. send a SOFT RESET | |
313 | . 2. wait for it to finish | |
314 | . 3. enable autorelease mode | |
315 | . 4. reset the memory management unit | |
316 | . 5. clear all interrupts | |
317 | . | |
318 | */ | |
319 | static void smc_reset( int ioaddr ) | |
320 | { | |
321 | /* This resets the registers mostly to defaults, but doesn't | |
322 | affect EEPROM. That seems unnecessary */ | |
323 | SMC_SELECT_BANK( 0 ); | |
324 | outw( RCR_SOFTRESET, ioaddr + RCR ); | |
325 | ||
326 | /* this should pause enough for the chip to be happy */ | |
327 | SMC_DELAY( ); | |
328 | ||
329 | /* Set the transmit and receive configuration registers to | |
330 | default values */ | |
331 | outw( RCR_CLEAR, ioaddr + RCR ); | |
332 | outw( TCR_CLEAR, ioaddr + TCR ); | |
333 | ||
334 | /* set the control register to automatically | |
335 | release successfully transmitted packets, to make the best | |
336 | use out of our limited memory */ | |
337 | SMC_SELECT_BANK( 1 ); | |
338 | outw( inw( ioaddr + CONTROL ) | CTL_AUTO_RELEASE , ioaddr + CONTROL ); | |
339 | ||
340 | /* Reset the MMU */ | |
341 | SMC_SELECT_BANK( 2 ); | |
342 | outw( MC_RESET, ioaddr + MMU_CMD ); | |
343 | ||
344 | /* Note: It doesn't seem that waiting for the MMU busy is needed here, | |
345 | but this is a place where future chipsets _COULD_ break. Be wary | |
346 | of issuing another MMU command right after this */ | |
347 | ||
348 | outb( 0, ioaddr + INT_MASK ); | |
349 | } | |
350 | ||
351 | /* | |
352 | . Function: smc_enable | |
353 | . Purpose: let the chip talk to the outside work | |
354 | . Method: | |
355 | . 1. Enable the transmitter | |
356 | . 2. Enable the receiver | |
357 | . 3. Enable interrupts | |
358 | */ | |
359 | static void smc_enable( int ioaddr ) | |
360 | { | |
361 | SMC_SELECT_BANK( 0 ); | |
362 | /* see the header file for options in TCR/RCR NORMAL*/ | |
363 | outw( TCR_NORMAL, ioaddr + TCR ); | |
364 | outw( RCR_NORMAL, ioaddr + RCR ); | |
365 | ||
366 | /* now, enable interrupts */ | |
367 | SMC_SELECT_BANK( 2 ); | |
368 | outb( SMC_INTERRUPT_MASK, ioaddr + INT_MASK ); | |
369 | } | |
370 | ||
371 | /* | |
372 | . Function: smc_shutdown | |
373 | . Purpose: closes down the SMC91xxx chip. | |
374 | . Method: | |
375 | . 1. zero the interrupt mask | |
376 | . 2. clear the enable receive flag | |
377 | . 3. clear the enable xmit flags | |
378 | . | |
379 | . TODO: | |
380 | . (1) maybe utilize power down mode. | |
381 | . Why not yet? Because while the chip will go into power down mode, | |
382 | . the manual says that it will wake up in response to any I/O requests | |
383 | . in the register space. Empirical results do not show this working. | |
384 | */ | |
385 | static void smc_shutdown( int ioaddr ) | |
386 | { | |
387 | /* no more interrupts for me */ | |
388 | SMC_SELECT_BANK( 2 ); | |
389 | outb( 0, ioaddr + INT_MASK ); | |
390 | ||
391 | /* and tell the card to stay away from that nasty outside world */ | |
392 | SMC_SELECT_BANK( 0 ); | |
393 | outb( RCR_CLEAR, ioaddr + RCR ); | |
394 | outb( TCR_CLEAR, ioaddr + TCR ); | |
395 | #if 0 | |
396 | /* finally, shut the chip down */ | |
397 | SMC_SELECT_BANK( 1 ); | |
398 | outw( inw( ioaddr + CONTROL ), CTL_POWERDOWN, ioaddr + CONTROL ); | |
399 | #endif | |
400 | } | |
401 | ||
402 | ||
403 | /* | |
22bedad3 | 404 | . Function: smc_setmulticast( int ioaddr, struct net_device *dev ) |
1da177e4 LT |
405 | . Purpose: |
406 | . This sets the internal hardware table to filter out unwanted multicast | |
407 | . packets before they take up memory. | |
408 | . | |
409 | . The SMC chip uses a hash table where the high 6 bits of the CRC of | |
410 | . address are the offset into the table. If that bit is 1, then the | |
411 | . multicast packet is accepted. Otherwise, it's dropped silently. | |
412 | . | |
413 | . To use the 6 bits as an offset into the table, the high 3 bits are the | |
414 | . number of the 8 bit register, while the low 3 bits are the bit within | |
415 | . that register. | |
416 | . | |
417 | . This routine is based very heavily on the one provided by Peter Cammaert. | |
418 | */ | |
419 | ||
420 | ||
567ec874 JP |
421 | static void smc_setmulticast(int ioaddr, struct net_device *dev) |
422 | { | |
1da177e4 LT |
423 | int i; |
424 | unsigned char multicast_table[ 8 ]; | |
22bedad3 | 425 | struct netdev_hw_addr *ha; |
1da177e4 LT |
426 | /* table for flipping the order of 3 bits */ |
427 | unsigned char invert3[] = { 0, 4, 2, 6, 1, 5, 3, 7 }; | |
428 | ||
429 | /* start with a table of all zeros: reject all */ | |
430 | memset( multicast_table, 0, sizeof( multicast_table ) ); | |
431 | ||
22bedad3 | 432 | netdev_for_each_mc_addr(ha, dev) { |
1da177e4 LT |
433 | int position; |
434 | ||
1da177e4 | 435 | /* only use the low order bits */ |
22bedad3 | 436 | position = ether_crc_le(6, ha->addr) & 0x3f; |
1da177e4 LT |
437 | |
438 | /* do some messy swapping to put the bit in the right spot */ | |
439 | multicast_table[invert3[position&7]] |= | |
440 | (1<<invert3[(position>>3)&7]); | |
441 | ||
442 | } | |
443 | /* now, the table can be loaded into the chipset */ | |
444 | SMC_SELECT_BANK( 3 ); | |
445 | ||
446 | for ( i = 0; i < 8 ; i++ ) { | |
447 | outb( multicast_table[i], ioaddr + MULTICAST1 + i ); | |
448 | } | |
449 | } | |
450 | ||
451 | /* | |
452 | . Function: smc_wait_to_send_packet( struct sk_buff * skb, struct net_device * ) | |
453 | . Purpose: | |
454 | . Attempt to allocate memory for a packet, if chip-memory is not | |
455 | . available, then tell the card to generate an interrupt when it | |
456 | . is available. | |
457 | . | |
458 | . Algorithm: | |
459 | . | |
460 | . o if the saved_skb is not currently null, then drop this packet | |
461 | . on the floor. This should never happen, because of TBUSY. | |
462 | . o if the saved_skb is null, then replace it with the current packet, | |
463 | . o See if I can sending it now. | |
464 | . o (NO): Enable interrupts and let the interrupt handler deal with it. | |
465 | . o (YES):Send it now. | |
466 | */ | |
61357325 SH |
467 | static netdev_tx_t smc_wait_to_send_packet(struct sk_buff *skb, |
468 | struct net_device *dev) | |
1da177e4 LT |
469 | { |
470 | struct smc_local *lp = netdev_priv(dev); | |
471 | unsigned int ioaddr = dev->base_addr; | |
472 | word length; | |
473 | unsigned short numPages; | |
474 | word time_out; | |
475 | ||
476 | netif_stop_queue(dev); | |
477 | /* Well, I want to send the packet.. but I don't know | |
478 | if I can send it right now... */ | |
479 | ||
480 | if ( lp->saved_skb) { | |
481 | /* THIS SHOULD NEVER HAPPEN. */ | |
09f75cd7 | 482 | dev->stats.tx_aborted_errors++; |
1da177e4 | 483 | printk(CARDNAME": Bad Craziness - sent packet while busy.\n" ); |
5b548140 | 484 | return NETDEV_TX_BUSY; |
1da177e4 LT |
485 | } |
486 | lp->saved_skb = skb; | |
487 | ||
488 | length = skb->len; | |
489 | ||
490 | if (length < ETH_ZLEN) { | |
5b057c6b | 491 | if (skb_padto(skb, ETH_ZLEN)) { |
1da177e4 | 492 | netif_wake_queue(dev); |
6ed10654 | 493 | return NETDEV_TX_OK; |
1da177e4 LT |
494 | } |
495 | length = ETH_ZLEN; | |
496 | } | |
6aa20a22 | 497 | |
1da177e4 LT |
498 | /* |
499 | ** The MMU wants the number of pages to be the number of 256 bytes | |
500 | ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) ) | |
501 | ** | |
502 | ** Pkt size for allocating is data length +6 (for additional status words, | |
503 | ** length and ctl!) If odd size last byte is included in this header. | |
504 | */ | |
505 | numPages = ((length & 0xfffe) + 6) / 256; | |
506 | ||
507 | if (numPages > 7 ) { | |
84d57bd6 | 508 | printk(CARDNAME": Far too big packet error.\n"); |
1da177e4 LT |
509 | /* freeing the packet is a good thing here... but should |
510 | . any packets of this size get down here? */ | |
511 | dev_kfree_skb (skb); | |
512 | lp->saved_skb = NULL; | |
513 | /* this IS an error, but, i don't want the skb saved */ | |
514 | netif_wake_queue(dev); | |
6ed10654 | 515 | return NETDEV_TX_OK; |
1da177e4 LT |
516 | } |
517 | /* either way, a packet is waiting now */ | |
518 | lp->packets_waiting++; | |
519 | ||
520 | /* now, try to allocate the memory */ | |
521 | SMC_SELECT_BANK( 2 ); | |
522 | outw( MC_ALLOC | numPages, ioaddr + MMU_CMD ); | |
523 | /* | |
524 | . Performance Hack | |
525 | . | |
526 | . wait a short amount of time.. if I can send a packet now, I send | |
527 | . it now. Otherwise, I enable an interrupt and wait for one to be | |
528 | . available. | |
529 | . | |
530 | . I could have handled this a slightly different way, by checking to | |
531 | . see if any memory was available in the FREE MEMORY register. However, | |
532 | . either way, I need to generate an allocation, and the allocation works | |
533 | . no matter what, so I saw no point in checking free memory. | |
534 | */ | |
535 | time_out = MEMORY_WAIT_TIME; | |
536 | do { | |
537 | word status; | |
538 | ||
539 | status = inb( ioaddr + INTERRUPT ); | |
540 | if ( status & IM_ALLOC_INT ) { | |
541 | /* acknowledge the interrupt */ | |
542 | outb( IM_ALLOC_INT, ioaddr + INTERRUPT ); | |
543 | break; | |
544 | } | |
545 | } while ( -- time_out ); | |
546 | ||
547 | if ( !time_out ) { | |
548 | /* oh well, wait until the chip finds memory later */ | |
549 | SMC_ENABLE_INT( IM_ALLOC_INT ); | |
84d57bd6 | 550 | PRINTK2((CARDNAME": memory allocation deferred.\n")); |
1da177e4 | 551 | /* it's deferred, but I'll handle it later */ |
84d57bd6 | 552 | return NETDEV_TX_OK; |
1da177e4 LT |
553 | } |
554 | /* or YES! I can send the packet now.. */ | |
555 | smc_hardware_send_packet(dev); | |
556 | netif_wake_queue(dev); | |
6ed10654 | 557 | return NETDEV_TX_OK; |
1da177e4 LT |
558 | } |
559 | ||
560 | /* | |
561 | . Function: smc_hardware_send_packet(struct net_device * ) | |
562 | . Purpose: | |
563 | . This sends the actual packet to the SMC9xxx chip. | |
564 | . | |
565 | . Algorithm: | |
566 | . First, see if a saved_skb is available. | |
567 | . ( this should NOT be called if there is no 'saved_skb' | |
568 | . Now, find the packet number that the chip allocated | |
569 | . Point the data pointers at it in memory | |
570 | . Set the length word in the chip's memory | |
571 | . Dump the packet to chip memory | |
572 | . Check if a last byte is needed ( odd length packet ) | |
573 | . if so, set the control flag right | |
574 | . Tell the card to send it | |
575 | . Enable the transmit interrupt, so I know if it failed | |
576 | . Free the kernel data if I actually sent it. | |
577 | */ | |
578 | static void smc_hardware_send_packet( struct net_device * dev ) | |
579 | { | |
580 | struct smc_local *lp = netdev_priv(dev); | |
581 | byte packet_no; | |
582 | struct sk_buff * skb = lp->saved_skb; | |
583 | word length; | |
584 | unsigned int ioaddr; | |
585 | byte * buf; | |
586 | ||
587 | ioaddr = dev->base_addr; | |
588 | ||
589 | if ( !skb ) { | |
84d57bd6 | 590 | PRINTK((CARDNAME": In XMIT with no packet to send\n")); |
1da177e4 LT |
591 | return; |
592 | } | |
593 | length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; | |
594 | buf = skb->data; | |
595 | ||
596 | /* If I get here, I _know_ there is a packet slot waiting for me */ | |
597 | packet_no = inb( ioaddr + PNR_ARR + 1 ); | |
598 | if ( packet_no & 0x80 ) { | |
599 | /* or isn't there? BAD CHIP! */ | |
2ad02bdc | 600 | netdev_dbg(dev, CARDNAME": Memory allocation failed.\n"); |
1da177e4 LT |
601 | dev_kfree_skb_any(skb); |
602 | lp->saved_skb = NULL; | |
603 | netif_wake_queue(dev); | |
604 | return; | |
605 | } | |
606 | ||
607 | /* we have a packet address, so tell the card to use it */ | |
608 | outb( packet_no, ioaddr + PNR_ARR ); | |
609 | ||
610 | /* point to the beginning of the packet */ | |
611 | outw( PTR_AUTOINC , ioaddr + POINTER ); | |
612 | ||
2ad02bdc | 613 | PRINTK3((CARDNAME": Trying to xmit packet of length %x\n", length)); |
1da177e4 LT |
614 | #if SMC_DEBUG > 2 |
615 | print_packet( buf, length ); | |
616 | #endif | |
617 | ||
618 | /* send the packet length ( +6 for status, length and ctl byte ) | |
619 | and the status word ( set to zeros ) */ | |
620 | #ifdef USE_32_BIT | |
621 | outl( (length +6 ) << 16 , ioaddr + DATA_1 ); | |
622 | #else | |
623 | outw( 0, ioaddr + DATA_1 ); | |
624 | /* send the packet length ( +6 for status words, length, and ctl*/ | |
625 | outb( (length+6) & 0xFF,ioaddr + DATA_1 ); | |
626 | outb( (length+6) >> 8 , ioaddr + DATA_1 ); | |
627 | #endif | |
628 | ||
629 | /* send the actual data | |
630 | . I _think_ it's faster to send the longs first, and then | |
631 | . mop up by sending the last word. It depends heavily | |
632 | . on alignment, at least on the 486. Maybe it would be | |
633 | . a good idea to check which is optimal? But that could take | |
634 | . almost as much time as is saved? | |
635 | */ | |
636 | #ifdef USE_32_BIT | |
637 | if ( length & 0x2 ) { | |
638 | outsl(ioaddr + DATA_1, buf, length >> 2 ); | |
1da177e4 | 639 | outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1); |
1da177e4 LT |
640 | } |
641 | else | |
642 | outsl(ioaddr + DATA_1, buf, length >> 2 ); | |
643 | #else | |
644 | outsw(ioaddr + DATA_1 , buf, (length ) >> 1); | |
645 | #endif | |
646 | /* Send the last byte, if there is one. */ | |
647 | ||
648 | if ( (length & 1) == 0 ) { | |
649 | outw( 0, ioaddr + DATA_1 ); | |
650 | } else { | |
651 | outb( buf[length -1 ], ioaddr + DATA_1 ); | |
652 | outb( 0x20, ioaddr + DATA_1); | |
653 | } | |
654 | ||
655 | /* enable the interrupts */ | |
656 | SMC_ENABLE_INT( (IM_TX_INT | IM_TX_EMPTY_INT) ); | |
657 | ||
658 | /* and let the chipset deal with it */ | |
659 | outw( MC_ENQUEUE , ioaddr + MMU_CMD ); | |
660 | ||
84d57bd6 | 661 | PRINTK2((CARDNAME": Sent packet of length %d\n", length)); |
1da177e4 LT |
662 | |
663 | lp->saved_skb = NULL; | |
664 | dev_kfree_skb_any (skb); | |
665 | ||
666 | dev->trans_start = jiffies; | |
667 | ||
668 | /* we can send another packet */ | |
669 | netif_wake_queue(dev); | |
1da177e4 LT |
670 | } |
671 | ||
672 | /*------------------------------------------------------------------------- | |
673 | | | |
674 | | smc_init(int unit) | |
675 | | Input parameters: | |
676 | | dev->base_addr == 0, try to find all possible locations | |
677 | | dev->base_addr == 1, return failure code | |
678 | | dev->base_addr == 2, always allocate space, and return success | |
679 | | dev->base_addr == <anything else> this is the address to check | |
680 | | | |
681 | | Output: | |
682 | | pointer to net_device or ERR_PTR(error) | |
683 | | | |
684 | --------------------------------------------------------------------------- | |
685 | */ | |
686 | static int io; | |
687 | static int irq; | |
688 | static int ifport; | |
689 | ||
690 | struct net_device * __init smc_init(int unit) | |
691 | { | |
692 | struct net_device *dev = alloc_etherdev(sizeof(struct smc_local)); | |
a2bd2ec8 | 693 | struct devlist *smcdev = smc_devlist; |
1da177e4 LT |
694 | int err = 0; |
695 | ||
1da177e4 LT |
696 | if (!dev) |
697 | return ERR_PTR(-ENODEV); | |
698 | ||
699 | if (unit >= 0) { | |
700 | sprintf(dev->name, "eth%d", unit); | |
701 | netdev_boot_setup_check(dev); | |
702 | io = dev->base_addr; | |
703 | irq = dev->irq; | |
704 | } | |
705 | ||
1da177e4 LT |
706 | if (io > 0x1ff) { /* Check a single specified location. */ |
707 | err = smc_probe(dev, io); | |
708 | } else if (io != 0) { /* Don't probe at all. */ | |
709 | err = -ENXIO; | |
710 | } else { | |
711 | for (;smcdev->port; smcdev++) { | |
712 | if (smc_probe(dev, smcdev->port) == 0) | |
713 | break; | |
714 | } | |
715 | if (!smcdev->port) | |
716 | err = -ENODEV; | |
717 | } | |
718 | if (err) | |
719 | goto out; | |
720 | err = register_netdev(dev); | |
721 | if (err) | |
722 | goto out1; | |
723 | return dev; | |
724 | out1: | |
725 | free_irq(dev->irq, dev); | |
726 | release_region(dev->base_addr, SMC_IO_EXTENT); | |
727 | out: | |
728 | free_netdev(dev); | |
729 | return ERR_PTR(err); | |
730 | } | |
731 | ||
732 | /*---------------------------------------------------------------------- | |
733 | . smc_findirq | |
734 | . | |
735 | . This routine has a simple purpose -- make the SMC chip generate an | |
736 | . interrupt, so an auto-detect routine can detect it, and find the IRQ, | |
737 | ------------------------------------------------------------------------ | |
738 | */ | |
dac499f9 | 739 | static int __init smc_findirq(int ioaddr) |
1da177e4 LT |
740 | { |
741 | #ifndef NO_AUTOPROBE | |
742 | int timeout = 20; | |
743 | unsigned long cookie; | |
744 | ||
745 | ||
746 | cookie = probe_irq_on(); | |
747 | ||
748 | /* | |
749 | * What I try to do here is trigger an ALLOC_INT. This is done | |
750 | * by allocating a small chunk of memory, which will give an interrupt | |
751 | * when done. | |
752 | */ | |
753 | ||
754 | ||
755 | SMC_SELECT_BANK(2); | |
756 | /* enable ALLOCation interrupts ONLY */ | |
757 | outb( IM_ALLOC_INT, ioaddr + INT_MASK ); | |
758 | ||
759 | /* | |
760 | . Allocate 512 bytes of memory. Note that the chip was just | |
761 | . reset so all the memory is available | |
762 | */ | |
763 | outw( MC_ALLOC | 1, ioaddr + MMU_CMD ); | |
764 | ||
765 | /* | |
766 | . Wait until positive that the interrupt has been generated | |
767 | */ | |
768 | while ( timeout ) { | |
769 | byte int_status; | |
770 | ||
771 | int_status = inb( ioaddr + INTERRUPT ); | |
772 | ||
773 | if ( int_status & IM_ALLOC_INT ) | |
774 | break; /* got the interrupt */ | |
775 | timeout--; | |
776 | } | |
777 | /* there is really nothing that I can do here if timeout fails, | |
778 | as probe_irq_off will return a 0 anyway, which is what I | |
779 | want in this case. Plus, the clean up is needed in both | |
780 | cases. */ | |
781 | ||
782 | /* DELAY HERE! | |
783 | On a fast machine, the status might change before the interrupt | |
784 | is given to the processor. This means that the interrupt was | |
785 | never detected, and probe_irq_off fails to report anything. | |
786 | This should fix probe_irq_* problems. | |
787 | */ | |
788 | SMC_DELAY(); | |
789 | SMC_DELAY(); | |
790 | ||
791 | /* and disable all interrupts again */ | |
792 | outb( 0, ioaddr + INT_MASK ); | |
793 | ||
794 | /* and return what I found */ | |
795 | return probe_irq_off(cookie); | |
796 | #else /* NO_AUTOPROBE */ | |
797 | struct devlist *smcdev; | |
798 | for (smcdev = smc_devlist; smcdev->port; smcdev++) { | |
799 | if (smcdev->port == ioaddr) | |
800 | return smcdev->irq; | |
801 | } | |
802 | return 0; | |
803 | #endif | |
804 | } | |
805 | ||
32670c36 SH |
806 | static const struct net_device_ops smc_netdev_ops = { |
807 | .ndo_open = smc_open, | |
808 | .ndo_stop = smc_close, | |
809 | .ndo_start_xmit = smc_wait_to_send_packet, | |
810 | .ndo_tx_timeout = smc_timeout, | |
afc4b13d | 811 | .ndo_set_rx_mode = smc_set_multicast_list, |
32670c36 SH |
812 | .ndo_change_mtu = eth_change_mtu, |
813 | .ndo_set_mac_address = eth_mac_addr, | |
814 | .ndo_validate_addr = eth_validate_addr, | |
815 | }; | |
816 | ||
1da177e4 LT |
817 | /*---------------------------------------------------------------------- |
818 | . Function: smc_probe( int ioaddr ) | |
819 | . | |
820 | . Purpose: | |
821 | . Tests to see if a given ioaddr points to an SMC9xxx chip. | |
822 | . Returns a 0 on success | |
823 | . | |
824 | . Algorithm: | |
825 | . (1) see if the high byte of BANK_SELECT is 0x33 | |
826 | . (2) compare the ioaddr with the base register's address | |
827 | . (3) see if I recognize the chip ID in the appropriate register | |
828 | . | |
829 | .--------------------------------------------------------------------- | |
830 | */ | |
831 | ||
832 | /*--------------------------------------------------------------- | |
833 | . Here I do typical initialization tasks. | |
834 | . | |
835 | . o Initialize the structure if needed | |
836 | . o print out my vanity message if not done so already | |
837 | . o print out what type of hardware is detected | |
838 | . o print out the ethernet address | |
839 | . o find the IRQ | |
840 | . o set up my private data | |
841 | . o configure the dev structure with my subroutines | |
842 | . o actually GRAB the irq. | |
843 | . o GRAB the region | |
844 | .----------------------------------------------------------------- | |
845 | */ | |
846 | static int __init smc_probe(struct net_device *dev, int ioaddr) | |
847 | { | |
848 | int i, memory, retval; | |
1da177e4 LT |
849 | unsigned int bank; |
850 | ||
851 | const char *version_string; | |
852 | const char *if_string; | |
853 | ||
854 | /* registers */ | |
855 | word revision_register; | |
856 | word base_address_register; | |
857 | word configuration_register; | |
858 | word memory_info_register; | |
859 | word memory_cfg_register; | |
860 | ||
861 | /* Grab the region so that no one else tries to probe our ioports. */ | |
862 | if (!request_region(ioaddr, SMC_IO_EXTENT, DRV_NAME)) | |
863 | return -EBUSY; | |
864 | ||
865 | dev->irq = irq; | |
866 | dev->if_port = ifport; | |
867 | ||
868 | /* First, see if the high byte is 0x33 */ | |
869 | bank = inw( ioaddr + BANK_SELECT ); | |
870 | if ( (bank & 0xFF00) != 0x3300 ) { | |
871 | retval = -ENODEV; | |
872 | goto err_out; | |
873 | } | |
874 | /* The above MIGHT indicate a device, but I need to write to further | |
875 | test this. */ | |
876 | outw( 0x0, ioaddr + BANK_SELECT ); | |
877 | bank = inw( ioaddr + BANK_SELECT ); | |
878 | if ( (bank & 0xFF00 ) != 0x3300 ) { | |
879 | retval = -ENODEV; | |
880 | goto err_out; | |
881 | } | |
1da177e4 LT |
882 | /* well, we've already written once, so hopefully another time won't |
883 | hurt. This time, I need to switch the bank register to bank 1, | |
884 | so I can access the base address register */ | |
885 | SMC_SELECT_BANK(1); | |
886 | base_address_register = inw( ioaddr + BASE ); | |
887 | if ( ioaddr != ( base_address_register >> 3 & 0x3E0 ) ) { | |
2450022a | 888 | printk(CARDNAME ": IOADDR %x doesn't match configuration (%x). " |
1da177e4 LT |
889 | "Probably not a SMC chip\n", |
890 | ioaddr, base_address_register >> 3 & 0x3E0 ); | |
891 | /* well, the base address register didn't match. Must not have | |
892 | been a SMC chip after all. */ | |
893 | retval = -ENODEV; | |
894 | goto err_out; | |
895 | } | |
1da177e4 LT |
896 | |
897 | /* check if the revision register is something that I recognize. | |
898 | These might need to be added to later, as future revisions | |
899 | could be added. */ | |
900 | SMC_SELECT_BANK(3); | |
901 | revision_register = inw( ioaddr + REVISION ); | |
902 | if ( !chip_ids[ ( revision_register >> 4 ) & 0xF ] ) { | |
903 | /* I don't recognize this chip, so... */ | |
904 | printk(CARDNAME ": IO %x: Unrecognized revision register:" | |
84d57bd6 | 905 | " %x, Contact author.\n", ioaddr, revision_register); |
1da177e4 LT |
906 | |
907 | retval = -ENODEV; | |
908 | goto err_out; | |
909 | } | |
910 | ||
911 | /* at this point I'll assume that the chip is an SMC9xxx. | |
912 | It might be prudent to check a listing of MAC addresses | |
913 | against the hardware address, or do some other tests. */ | |
914 | ||
2ad02bdc | 915 | pr_info_once("%s\n", version); |
1da177e4 LT |
916 | |
917 | /* fill in some of the fields */ | |
918 | dev->base_addr = ioaddr; | |
919 | ||
920 | /* | |
921 | . Get the MAC address ( bank 1, regs 4 - 9 ) | |
922 | */ | |
923 | SMC_SELECT_BANK( 1 ); | |
924 | for ( i = 0; i < 6; i += 2 ) { | |
925 | word address; | |
926 | ||
927 | address = inw( ioaddr + ADDR0 + i ); | |
928 | dev->dev_addr[ i + 1] = address >> 8; | |
929 | dev->dev_addr[ i ] = address & 0xFF; | |
930 | } | |
931 | ||
932 | /* get the memory information */ | |
933 | ||
934 | SMC_SELECT_BANK( 0 ); | |
935 | memory_info_register = inw( ioaddr + MIR ); | |
936 | memory_cfg_register = inw( ioaddr + MCR ); | |
937 | memory = ( memory_cfg_register >> 9 ) & 0x7; /* multiplier */ | |
938 | memory *= 256 * ( memory_info_register & 0xFF ); | |
939 | ||
940 | /* | |
941 | Now, I want to find out more about the chip. This is sort of | |
942 | redundant, but it's cleaner to have it in both, rather than having | |
943 | one VERY long probe procedure. | |
944 | */ | |
945 | SMC_SELECT_BANK(3); | |
946 | revision_register = inw( ioaddr + REVISION ); | |
947 | version_string = chip_ids[ ( revision_register >> 4 ) & 0xF ]; | |
948 | if ( !version_string ) { | |
949 | /* I shouldn't get here because this call was done before.... */ | |
950 | retval = -ENODEV; | |
951 | goto err_out; | |
952 | } | |
953 | ||
954 | /* is it using AUI or 10BaseT ? */ | |
955 | if ( dev->if_port == 0 ) { | |
956 | SMC_SELECT_BANK(1); | |
957 | configuration_register = inw( ioaddr + CONFIG ); | |
958 | if ( configuration_register & CFG_AUI_SELECT ) | |
959 | dev->if_port = 2; | |
960 | else | |
961 | dev->if_port = 1; | |
962 | } | |
963 | if_string = interfaces[ dev->if_port - 1 ]; | |
964 | ||
965 | /* now, reset the chip, and put it into a known state */ | |
966 | smc_reset( ioaddr ); | |
967 | ||
968 | /* | |
969 | . If dev->irq is 0, then the device has to be banged on to see | |
970 | . what the IRQ is. | |
971 | . | |
972 | . This banging doesn't always detect the IRQ, for unknown reasons. | |
973 | . a workaround is to reset the chip and try again. | |
974 | . | |
975 | . Interestingly, the DOS packet driver *SETS* the IRQ on the card to | |
976 | . be what is requested on the command line. I don't do that, mostly | |
977 | . because the card that I have uses a non-standard method of accessing | |
978 | . the IRQs, and because this _should_ work in most configurations. | |
979 | . | |
980 | . Specifying an IRQ is done with the assumption that the user knows | |
981 | . what (s)he is doing. No checking is done!!!! | |
982 | . | |
983 | */ | |
984 | if ( dev->irq < 2 ) { | |
985 | int trials; | |
986 | ||
987 | trials = 3; | |
988 | while ( trials-- ) { | |
989 | dev->irq = smc_findirq( ioaddr ); | |
990 | if ( dev->irq ) | |
991 | break; | |
992 | /* kick the card and try again */ | |
993 | smc_reset( ioaddr ); | |
994 | } | |
995 | } | |
996 | if (dev->irq == 0 ) { | |
997 | printk(CARDNAME": Couldn't autodetect your IRQ. Use irq=xx.\n"); | |
998 | retval = -ENODEV; | |
999 | goto err_out; | |
1000 | } | |
1001 | ||
1002 | /* now, print out the card info, in a short format.. */ | |
1003 | ||
2ad02bdc BB |
1004 | netdev_info(dev, "%s(r:%d) at %#3x IRQ:%d INTF:%s MEM:%db ", |
1005 | version_string, revision_register & 0xF, ioaddr, dev->irq, | |
1006 | if_string, memory); | |
1da177e4 LT |
1007 | /* |
1008 | . Print the Ethernet address | |
1009 | */ | |
2ad02bdc | 1010 | netdev_info(dev, "ADDR: %pM\n", dev->dev_addr); |
1da177e4 | 1011 | |
1da177e4 | 1012 | /* Grab the IRQ */ |
2ad02bdc BB |
1013 | retval = request_irq(dev->irq, smc_interrupt, 0, DRV_NAME, dev); |
1014 | if (retval) { | |
1015 | netdev_warn(dev, "%s: unable to get IRQ %d (irqval=%d).\n", | |
1016 | DRV_NAME, dev->irq, retval); | |
1017 | goto err_out; | |
1018 | } | |
1da177e4 | 1019 | |
32670c36 | 1020 | dev->netdev_ops = &smc_netdev_ops; |
1da177e4 | 1021 | dev->watchdog_timeo = HZ/20; |
1da177e4 LT |
1022 | |
1023 | return 0; | |
1024 | ||
1025 | err_out: | |
1026 | release_region(ioaddr, SMC_IO_EXTENT); | |
1027 | return retval; | |
1028 | } | |
1029 | ||
1030 | #if SMC_DEBUG > 2 | |
1031 | static void print_packet( byte * buf, int length ) | |
1032 | { | |
1033 | #if 0 | |
0118e019 JP |
1034 | print_hex_dump_debug(DRV_NAME, DUMP_PREFIX_OFFSET, 16, 1, |
1035 | buf, length, true); | |
1da177e4 LT |
1036 | #endif |
1037 | } | |
1038 | #endif | |
1039 | ||
1040 | ||
1041 | /* | |
1042 | * Open and Initialize the board | |
1043 | * | |
1044 | * Set up everything, reset the card, etc .. | |
1045 | * | |
1046 | */ | |
1047 | static int smc_open(struct net_device *dev) | |
1048 | { | |
1049 | int ioaddr = dev->base_addr; | |
1050 | ||
1051 | int i; /* used to set hw ethernet address */ | |
1052 | ||
1053 | /* clear out all the junk that was put here before... */ | |
8f15ea42 | 1054 | memset(netdev_priv(dev), 0, sizeof(struct smc_local)); |
1da177e4 LT |
1055 | |
1056 | /* reset the hardware */ | |
1057 | ||
1058 | smc_reset( ioaddr ); | |
1059 | smc_enable( ioaddr ); | |
1060 | ||
1061 | /* Select which interface to use */ | |
1062 | ||
1063 | SMC_SELECT_BANK( 1 ); | |
1064 | if ( dev->if_port == 1 ) { | |
1065 | outw( inw( ioaddr + CONFIG ) & ~CFG_AUI_SELECT, | |
1066 | ioaddr + CONFIG ); | |
1067 | } | |
1068 | else if ( dev->if_port == 2 ) { | |
1069 | outw( inw( ioaddr + CONFIG ) | CFG_AUI_SELECT, | |
1070 | ioaddr + CONFIG ); | |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | According to Becker, I have to set the hardware address | |
1075 | at this point, because the (l)user can set it with an | |
1076 | ioctl. Easily done... | |
1077 | */ | |
1078 | SMC_SELECT_BANK( 1 ); | |
1079 | for ( i = 0; i < 6; i += 2 ) { | |
1080 | word address; | |
1081 | ||
1082 | address = dev->dev_addr[ i + 1 ] << 8 ; | |
1083 | address |= dev->dev_addr[ i ]; | |
1084 | outw( address, ioaddr + ADDR0 + i ); | |
1085 | } | |
6aa20a22 | 1086 | |
1da177e4 LT |
1087 | netif_start_queue(dev); |
1088 | return 0; | |
1089 | } | |
1090 | ||
1091 | /*-------------------------------------------------------- | |
1092 | . Called by the kernel to send a packet out into the void | |
1093 | . of the net. This routine is largely based on | |
1094 | . skeleton.c, from Becker. | |
1095 | .-------------------------------------------------------- | |
1096 | */ | |
1097 | ||
1098 | static void smc_timeout(struct net_device *dev) | |
1099 | { | |
1100 | /* If we get here, some higher level has decided we are broken. | |
1101 | There should really be a "kick me" function call instead. */ | |
2ad02bdc BB |
1102 | netdev_warn(dev, CARDNAME": transmit timed out, %s?\n", |
1103 | tx_done(dev) ? "IRQ conflict" : "network cable problem"); | |
1da177e4 LT |
1104 | /* "kick" the adaptor */ |
1105 | smc_reset( dev->base_addr ); | |
1106 | smc_enable( dev->base_addr ); | |
1ae5dc34 | 1107 | dev->trans_start = jiffies; /* prevent tx timeout */ |
1da177e4 | 1108 | /* clear anything saved */ |
8f15ea42 | 1109 | ((struct smc_local *)netdev_priv(dev))->saved_skb = NULL; |
1da177e4 LT |
1110 | netif_wake_queue(dev); |
1111 | } | |
1112 | ||
1113 | /*------------------------------------------------------------- | |
1114 | . | |
1115 | . smc_rcv - receive a packet from the card | |
1116 | . | |
1117 | . There is ( at least ) a packet waiting to be read from | |
1118 | . chip-memory. | |
1119 | . | |
1120 | . o Read the status | |
1121 | . o If an error, record it | |
1122 | . o otherwise, read in the packet | |
1123 | -------------------------------------------------------------- | |
1124 | */ | |
1125 | static void smc_rcv(struct net_device *dev) | |
1126 | { | |
1da177e4 LT |
1127 | int ioaddr = dev->base_addr; |
1128 | int packet_number; | |
1129 | word status; | |
1130 | word packet_length; | |
1131 | ||
1132 | /* assume bank 2 */ | |
1133 | ||
1134 | packet_number = inw( ioaddr + FIFO_PORTS ); | |
1135 | ||
1136 | if ( packet_number & FP_RXEMPTY ) { | |
1137 | /* we got called , but nothing was on the FIFO */ | |
84d57bd6 | 1138 | PRINTK((CARDNAME ": WARNING: smc_rcv with nothing on FIFO.\n")); |
1da177e4 LT |
1139 | /* don't need to restore anything */ |
1140 | return; | |
1141 | } | |
1142 | ||
1143 | /* start reading from the start of the packet */ | |
1144 | outw( PTR_READ | PTR_RCV | PTR_AUTOINC, ioaddr + POINTER ); | |
1145 | ||
1146 | /* First two words are status and packet_length */ | |
1147 | status = inw( ioaddr + DATA_1 ); | |
1148 | packet_length = inw( ioaddr + DATA_1 ); | |
1149 | ||
1150 | packet_length &= 0x07ff; /* mask off top bits */ | |
1151 | ||
1152 | PRINTK2(("RCV: STATUS %4x LENGTH %4x\n", status, packet_length )); | |
1153 | /* | |
1154 | . the packet length contains 3 extra words : | |
1155 | . status, length, and an extra word with an odd byte . | |
1156 | */ | |
1157 | packet_length -= 6; | |
1158 | ||
1159 | if ( !(status & RS_ERRORS ) ){ | |
1160 | /* do stuff to make a new packet */ | |
1161 | struct sk_buff * skb; | |
1162 | byte * data; | |
1163 | ||
1164 | /* read one extra byte */ | |
1165 | if ( status & RS_ODDFRAME ) | |
1166 | packet_length++; | |
1167 | ||
1168 | /* set multicast stats */ | |
1169 | if ( status & RS_MULTICAST ) | |
09f75cd7 | 1170 | dev->stats.multicast++; |
1da177e4 | 1171 | |
dae2e9f4 | 1172 | skb = netdev_alloc_skb(dev, packet_length + 5); |
1da177e4 | 1173 | if ( skb == NULL ) { |
09f75cd7 | 1174 | dev->stats.rx_dropped++; |
1da177e4 LT |
1175 | goto done; |
1176 | } | |
1177 | ||
1178 | /* | |
1179 | ! This should work without alignment, but it could be | |
1180 | ! in the worse case | |
1181 | */ | |
1182 | ||
1183 | skb_reserve( skb, 2 ); /* 16 bit alignment */ | |
1184 | ||
1da177e4 LT |
1185 | data = skb_put( skb, packet_length); |
1186 | ||
1187 | #ifdef USE_32_BIT | |
1188 | /* QUESTION: Like in the TX routine, do I want | |
1189 | to send the DWORDs or the bytes first, or some | |
1190 | mixture. A mixture might improve already slow PIO | |
1191 | performance */ | |
84d57bd6 | 1192 | PRINTK3((" Reading %d dwords (and %d bytes)\n", |
1da177e4 LT |
1193 | packet_length >> 2, packet_length & 3 )); |
1194 | insl(ioaddr + DATA_1 , data, packet_length >> 2 ); | |
1195 | /* read the left over bytes */ | |
1196 | insb( ioaddr + DATA_1, data + (packet_length & 0xFFFFFC), | |
1197 | packet_length & 0x3 ); | |
1198 | #else | |
84d57bd6 | 1199 | PRINTK3((" Reading %d words and %d byte(s)\n", |
1da177e4 LT |
1200 | (packet_length >> 1 ), packet_length & 1 )); |
1201 | insw(ioaddr + DATA_1 , data, packet_length >> 1); | |
1202 | if ( packet_length & 1 ) { | |
1203 | data += packet_length & ~1; | |
1204 | *(data++) = inb( ioaddr + DATA_1 ); | |
1205 | } | |
1206 | #endif | |
1207 | #if SMC_DEBUG > 2 | |
1208 | print_packet( data, packet_length ); | |
1209 | #endif | |
1210 | ||
1211 | skb->protocol = eth_type_trans(skb, dev ); | |
1212 | netif_rx(skb); | |
09f75cd7 JG |
1213 | dev->stats.rx_packets++; |
1214 | dev->stats.rx_bytes += packet_length; | |
1da177e4 LT |
1215 | } else { |
1216 | /* error ... */ | |
09f75cd7 | 1217 | dev->stats.rx_errors++; |
1da177e4 | 1218 | |
09f75cd7 | 1219 | if ( status & RS_ALGNERR ) dev->stats.rx_frame_errors++; |
1da177e4 | 1220 | if ( status & (RS_TOOSHORT | RS_TOOLONG ) ) |
09f75cd7 JG |
1221 | dev->stats.rx_length_errors++; |
1222 | if ( status & RS_BADCRC) dev->stats.rx_crc_errors++; | |
1da177e4 LT |
1223 | } |
1224 | ||
1225 | done: | |
1226 | /* error or good, tell the card to get rid of this packet */ | |
1227 | outw( MC_RELEASE, ioaddr + MMU_CMD ); | |
1228 | } | |
1229 | ||
1230 | ||
1231 | /************************************************************************* | |
1232 | . smc_tx | |
1233 | . | |
1234 | . Purpose: Handle a transmit error message. This will only be called | |
1235 | . when an error, because of the AUTO_RELEASE mode. | |
1236 | . | |
1237 | . Algorithm: | |
1238 | . Save pointer and packet no | |
1239 | . Get the packet no from the top of the queue | |
1240 | . check if it's valid ( if not, is this an error??? ) | |
1241 | . read the status word | |
1242 | . record the error | |
1243 | . ( resend? Not really, since we don't want old packets around ) | |
1244 | . Restore saved values | |
1245 | ************************************************************************/ | |
1246 | static void smc_tx( struct net_device * dev ) | |
1247 | { | |
1248 | int ioaddr = dev->base_addr; | |
1249 | struct smc_local *lp = netdev_priv(dev); | |
1250 | byte saved_packet; | |
1251 | byte packet_no; | |
1252 | word tx_status; | |
1253 | ||
1254 | ||
1255 | /* assume bank 2 */ | |
1256 | ||
1257 | saved_packet = inb( ioaddr + PNR_ARR ); | |
1258 | packet_no = inw( ioaddr + FIFO_PORTS ); | |
1259 | packet_no &= 0x7F; | |
1260 | ||
1261 | /* select this as the packet to read from */ | |
1262 | outb( packet_no, ioaddr + PNR_ARR ); | |
1263 | ||
1264 | /* read the first word from this packet */ | |
1265 | outw( PTR_AUTOINC | PTR_READ, ioaddr + POINTER ); | |
1266 | ||
1267 | tx_status = inw( ioaddr + DATA_1 ); | |
84d57bd6 | 1268 | PRINTK3((CARDNAME": TX DONE STATUS: %4x\n", tx_status)); |
1da177e4 | 1269 | |
09f75cd7 JG |
1270 | dev->stats.tx_errors++; |
1271 | if ( tx_status & TS_LOSTCAR ) dev->stats.tx_carrier_errors++; | |
1da177e4 | 1272 | if ( tx_status & TS_LATCOL ) { |
2ad02bdc | 1273 | netdev_dbg(dev, CARDNAME": Late collision occurred on last xmit.\n"); |
09f75cd7 | 1274 | dev->stats.tx_window_errors++; |
1da177e4 LT |
1275 | } |
1276 | #if 0 | |
1277 | if ( tx_status & TS_16COL ) { ... } | |
1278 | #endif | |
1279 | ||
1280 | if ( tx_status & TS_SUCCESS ) { | |
2ad02bdc | 1281 | netdev_info(dev, CARDNAME": Successful packet caused interrupt\n"); |
1da177e4 LT |
1282 | } |
1283 | /* re-enable transmit */ | |
1284 | SMC_SELECT_BANK( 0 ); | |
1285 | outw( inw( ioaddr + TCR ) | TCR_ENABLE, ioaddr + TCR ); | |
1286 | ||
1287 | /* kill the packet */ | |
1288 | SMC_SELECT_BANK( 2 ); | |
1289 | outw( MC_FREEPKT, ioaddr + MMU_CMD ); | |
1290 | ||
1291 | /* one less packet waiting for me */ | |
1292 | lp->packets_waiting--; | |
1293 | ||
1294 | outb( saved_packet, ioaddr + PNR_ARR ); | |
1da177e4 LT |
1295 | } |
1296 | ||
1297 | /*-------------------------------------------------------------------- | |
1298 | . | |
1299 | . This is the main routine of the driver, to handle the device when | |
1300 | . it needs some attention. | |
1301 | . | |
1302 | . So: | |
1303 | . first, save state of the chipset | |
1304 | . branch off into routines to handle each case, and acknowledge | |
1305 | . each to the interrupt register | |
1306 | . and finally restore state. | |
1307 | . | |
1308 | ---------------------------------------------------------------------*/ | |
1309 | ||
7d12e780 | 1310 | static irqreturn_t smc_interrupt(int irq, void * dev_id) |
1da177e4 LT |
1311 | { |
1312 | struct net_device *dev = dev_id; | |
1313 | int ioaddr = dev->base_addr; | |
1314 | struct smc_local *lp = netdev_priv(dev); | |
1315 | ||
1316 | byte status; | |
1317 | word card_stats; | |
1318 | byte mask; | |
1319 | int timeout; | |
1320 | /* state registers */ | |
1321 | word saved_bank; | |
1322 | word saved_pointer; | |
1323 | int handled = 0; | |
1324 | ||
1325 | ||
84d57bd6 | 1326 | PRINTK3((CARDNAME": SMC interrupt started\n")); |
1da177e4 LT |
1327 | |
1328 | saved_bank = inw( ioaddr + BANK_SELECT ); | |
1329 | ||
1330 | SMC_SELECT_BANK(2); | |
1331 | saved_pointer = inw( ioaddr + POINTER ); | |
1332 | ||
1333 | mask = inb( ioaddr + INT_MASK ); | |
1334 | /* clear all interrupts */ | |
1335 | outb( 0, ioaddr + INT_MASK ); | |
1336 | ||
1337 | ||
1338 | /* set a timeout value, so I don't stay here forever */ | |
1339 | timeout = 4; | |
1340 | ||
84d57bd6 | 1341 | PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x\n", mask)); |
1da177e4 LT |
1342 | do { |
1343 | /* read the status flag, and mask it */ | |
1344 | status = inb( ioaddr + INTERRUPT ) & mask; | |
1345 | if (!status ) | |
1346 | break; | |
1347 | ||
1348 | handled = 1; | |
1349 | ||
1350 | PRINTK3((KERN_WARNING CARDNAME | |
84d57bd6 | 1351 | ": Handling interrupt status %x\n", status)); |
1da177e4 LT |
1352 | |
1353 | if (status & IM_RCV_INT) { | |
1354 | /* Got a packet(s). */ | |
1355 | PRINTK2((KERN_WARNING CARDNAME | |
1356 | ": Receive Interrupt\n")); | |
1357 | smc_rcv(dev); | |
1358 | } else if (status & IM_TX_INT ) { | |
1359 | PRINTK2((KERN_WARNING CARDNAME | |
1360 | ": TX ERROR handled\n")); | |
1361 | smc_tx(dev); | |
1362 | outb(IM_TX_INT, ioaddr + INTERRUPT ); | |
1363 | } else if (status & IM_TX_EMPTY_INT ) { | |
1364 | /* update stats */ | |
1365 | SMC_SELECT_BANK( 0 ); | |
1366 | card_stats = inw( ioaddr + COUNTER ); | |
1367 | /* single collisions */ | |
09f75cd7 | 1368 | dev->stats.collisions += card_stats & 0xF; |
1da177e4 LT |
1369 | card_stats >>= 4; |
1370 | /* multiple collisions */ | |
09f75cd7 | 1371 | dev->stats.collisions += card_stats & 0xF; |
1da177e4 LT |
1372 | |
1373 | /* these are for when linux supports these statistics */ | |
1374 | ||
1375 | SMC_SELECT_BANK( 2 ); | |
1376 | PRINTK2((KERN_WARNING CARDNAME | |
1377 | ": TX_BUFFER_EMPTY handled\n")); | |
1378 | outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT ); | |
1379 | mask &= ~IM_TX_EMPTY_INT; | |
09f75cd7 | 1380 | dev->stats.tx_packets += lp->packets_waiting; |
1da177e4 LT |
1381 | lp->packets_waiting = 0; |
1382 | ||
1383 | } else if (status & IM_ALLOC_INT ) { | |
1384 | PRINTK2((KERN_DEBUG CARDNAME | |
84d57bd6 | 1385 | ": Allocation interrupt\n")); |
1da177e4 LT |
1386 | /* clear this interrupt so it doesn't happen again */ |
1387 | mask &= ~IM_ALLOC_INT; | |
1388 | ||
1389 | smc_hardware_send_packet( dev ); | |
1390 | ||
1391 | /* enable xmit interrupts based on this */ | |
1392 | mask |= ( IM_TX_EMPTY_INT | IM_TX_INT ); | |
1393 | ||
1394 | /* and let the card send more packets to me */ | |
1395 | netif_wake_queue(dev); | |
1396 | ||
1397 | PRINTK2((CARDNAME": Handoff done successfully.\n")); | |
1398 | } else if (status & IM_RX_OVRN_INT ) { | |
09f75cd7 JG |
1399 | dev->stats.rx_errors++; |
1400 | dev->stats.rx_fifo_errors++; | |
1da177e4 LT |
1401 | outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT ); |
1402 | } else if (status & IM_EPH_INT ) { | |
84d57bd6 | 1403 | PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT\n")); |
1da177e4 | 1404 | } else if (status & IM_ERCV_INT ) { |
84d57bd6 | 1405 | PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT\n")); |
1da177e4 LT |
1406 | outb( IM_ERCV_INT, ioaddr + INTERRUPT ); |
1407 | } | |
1408 | } while ( timeout -- ); | |
1409 | ||
1410 | ||
1411 | /* restore state register */ | |
1412 | SMC_SELECT_BANK( 2 ); | |
1413 | outb( mask, ioaddr + INT_MASK ); | |
1414 | ||
84d57bd6 | 1415 | PRINTK3((KERN_WARNING CARDNAME ": MASK is now %x\n", mask)); |
1da177e4 LT |
1416 | outw( saved_pointer, ioaddr + POINTER ); |
1417 | ||
1418 | SMC_SELECT_BANK( saved_bank ); | |
1419 | ||
1420 | PRINTK3((CARDNAME ": Interrupt done\n")); | |
1421 | return IRQ_RETVAL(handled); | |
1422 | } | |
1423 | ||
1424 | ||
1425 | /*---------------------------------------------------- | |
1426 | . smc_close | |
1427 | . | |
1428 | . this makes the board clean up everything that it can | |
1429 | . and not talk to the outside world. Caused by | |
1430 | . an 'ifconfig ethX down' | |
1431 | . | |
1432 | -----------------------------------------------------*/ | |
1433 | static int smc_close(struct net_device *dev) | |
1434 | { | |
1435 | netif_stop_queue(dev); | |
1436 | /* clear everything */ | |
1437 | smc_shutdown( dev->base_addr ); | |
1438 | ||
1439 | /* Update the statistics here. */ | |
1440 | return 0; | |
1441 | } | |
1442 | ||
1da177e4 LT |
1443 | /*----------------------------------------------------------- |
1444 | . smc_set_multicast_list | |
1445 | . | |
1446 | . This routine will, depending on the values passed to it, | |
1447 | . either make it accept multicast packets, go into | |
1448 | . promiscuous mode ( for TCPDUMP and cousins ) or accept | |
1449 | . a select set of multicast packets | |
1450 | */ | |
1451 | static void smc_set_multicast_list(struct net_device *dev) | |
1452 | { | |
1453 | short ioaddr = dev->base_addr; | |
1454 | ||
1455 | SMC_SELECT_BANK(0); | |
1456 | if ( dev->flags & IFF_PROMISC ) | |
1457 | outw( inw(ioaddr + RCR ) | RCR_PROMISC, ioaddr + RCR ); | |
1458 | ||
1459 | /* BUG? I never disable promiscuous mode if multicasting was turned on. | |
1460 | Now, I turn off promiscuous mode, but I don't do anything to multicasting | |
1461 | when promiscuous mode is turned on. | |
1462 | */ | |
1463 | ||
1464 | /* Here, I am setting this to accept all multicast packets. | |
1465 | I don't need to zero the multicast table, because the flag is | |
1466 | checked before the table is | |
1467 | */ | |
1468 | else if (dev->flags & IFF_ALLMULTI) | |
1469 | outw( inw(ioaddr + RCR ) | RCR_ALMUL, ioaddr + RCR ); | |
1470 | ||
1471 | /* We just get all multicast packets even if we only want them | |
1472 | . from one source. This will be changed at some future | |
1473 | . point. */ | |
4cd24eaf | 1474 | else if (!netdev_mc_empty(dev)) { |
1da177e4 LT |
1475 | /* support hardware multicasting */ |
1476 | ||
1477 | /* be sure I get rid of flags I might have set */ | |
1478 | outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL), | |
1479 | ioaddr + RCR ); | |
1480 | /* NOTE: this has to set the bank, so make sure it is the | |
1481 | last thing called. The bank is set to zero at the top */ | |
567ec874 | 1482 | smc_setmulticast(ioaddr, dev); |
1da177e4 LT |
1483 | } |
1484 | else { | |
1485 | outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL), | |
1486 | ioaddr + RCR ); | |
1487 | ||
1488 | /* | |
1489 | since I'm disabling all multicast entirely, I need to | |
1490 | clear the multicast list | |
1491 | */ | |
1492 | SMC_SELECT_BANK( 3 ); | |
1493 | outw( 0, ioaddr + MULTICAST1 ); | |
1494 | outw( 0, ioaddr + MULTICAST2 ); | |
1495 | outw( 0, ioaddr + MULTICAST3 ); | |
1496 | outw( 0, ioaddr + MULTICAST4 ); | |
1497 | } | |
1498 | } | |
1499 | ||
1500 | #ifdef MODULE | |
1501 | ||
1502 | static struct net_device *devSMC9194; | |
1503 | MODULE_LICENSE("GPL"); | |
1504 | ||
1505 | module_param(io, int, 0); | |
1506 | module_param(irq, int, 0); | |
1507 | module_param(ifport, int, 0); | |
1508 | MODULE_PARM_DESC(io, "SMC 99194 I/O base address"); | |
1509 | MODULE_PARM_DESC(irq, "SMC 99194 IRQ number"); | |
1510 | MODULE_PARM_DESC(ifport, "SMC 99194 interface port (0-default, 1-TP, 2-AUI)"); | |
1511 | ||
a2bd2ec8 | 1512 | int __init init_module(void) |
1da177e4 LT |
1513 | { |
1514 | if (io == 0) | |
1515 | printk(KERN_WARNING | |
1516 | CARDNAME": You shouldn't use auto-probing with insmod!\n" ); | |
1517 | ||
1518 | /* copy the parameters from insmod into the device structure */ | |
1519 | devSMC9194 = smc_init(-1); | |
c1fcbaa5 | 1520 | return PTR_ERR_OR_ZERO(devSMC9194); |
1da177e4 LT |
1521 | } |
1522 | ||
afc8eb46 | 1523 | void __exit cleanup_module(void) |
1da177e4 LT |
1524 | { |
1525 | unregister_netdev(devSMC9194); | |
1526 | free_irq(devSMC9194->irq, devSMC9194); | |
1527 | release_region(devSMC9194->base_addr, SMC_IO_EXTENT); | |
1528 | free_netdev(devSMC9194); | |
1529 | } | |
1530 | ||
1531 | #endif /* MODULE */ |