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45219c46 WD |
1 | /*------------------------------------------------------------------------ |
2 | * lan91c96.c | |
3 | * This is a driver for SMSC's LAN91C96 single-chip Ethernet device, based | |
4 | * on the SMC91111 driver from U-boot. | |
5 | * | |
6 | * (C) Copyright 2002 | |
7 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> | |
8 | * Rolf Offermanns <rof@sysgo.de> | |
9 | * | |
10 | * Copyright (C) 2001 Standard Microsystems Corporation (SMSC) | |
11 | * Developed by Simple Network Magic Corporation (SNMC) | |
12 | * Copyright (C) 1996 by Erik Stahlman (ES) | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or | |
17 | * (at your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software | |
26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
27 | * | |
28 | * Information contained in this file was obtained from the LAN91C96 | |
29 | * manual from SMC. To get a copy, if you really want one, you can find | |
30 | * information under www.smsc.com. | |
31 | * | |
32 | * | |
33 | * "Features" of the SMC chip: | |
34 | * 6144 byte packet memory. ( for the 91C96 ) | |
35 | * EEPROM for configuration | |
36 | * AUI/TP selection ( mine has 10Base2/10BaseT select ) | |
37 | * | |
38 | * Arguments: | |
1b769881 | 39 | * io = for the base address |
45219c46 WD |
40 | * irq = for the IRQ |
41 | * | |
42 | * author: | |
1b769881 JCPV |
43 | * Erik Stahlman ( erik@vt.edu ) |
44 | * Daris A Nevil ( dnevil@snmc.com ) | |
45219c46 WD |
45 | * |
46 | * | |
47 | * Hardware multicast code from Peter Cammaert ( pc@denkart.be ) | |
48 | * | |
49 | * Sources: | |
50 | * o SMSC LAN91C96 databook (www.smsc.com) | |
51 | * o smc91111.c (u-boot driver) | |
52 | * o smc9194.c (linux kernel driver) | |
53 | * o lan91c96.c (Intel Diagnostic Manager driver) | |
54 | * | |
55 | * History: | |
1b769881 | 56 | * 04/30/03 Mathijs Haarman Modified smc91111.c (u-boot version) |
45219c46 WD |
57 | * for lan91c96 |
58 | *--------------------------------------------------------------------------- | |
59 | */ | |
60 | ||
61 | #include <common.h> | |
62 | #include <command.h> | |
63 | #include "lan91c96.h" | |
64 | #include <net.h> | |
65 | ||
66 | #ifdef CONFIG_DRIVER_LAN91C96 | |
67 | ||
07d38a17 | 68 | #if defined(CONFIG_CMD_NET) |
45219c46 WD |
69 | |
70 | /*------------------------------------------------------------------------ | |
71 | * | |
72 | * Configuration options, for the experienced user to change. | |
73 | * | |
74 | -------------------------------------------------------------------------*/ | |
75 | ||
76 | /* Use power-down feature of the chip */ | |
77 | #define POWER_DOWN 0 | |
78 | ||
79 | /* | |
80 | * Wait time for memory to be free. This probably shouldn't be | |
81 | * tuned that much, as waiting for this means nothing else happens | |
82 | * in the system | |
83 | */ | |
84 | #define MEMORY_WAIT_TIME 16 | |
85 | ||
86 | #define SMC_DEBUG 0 | |
87 | ||
88 | #if (SMC_DEBUG > 2 ) | |
89 | #define PRINTK3(args...) printf(args) | |
90 | #else | |
91 | #define PRINTK3(args...) | |
92 | #endif | |
93 | ||
94 | #if SMC_DEBUG > 1 | |
95 | #define PRINTK2(args...) printf(args) | |
96 | #else | |
97 | #define PRINTK2(args...) | |
98 | #endif | |
99 | ||
100 | #ifdef SMC_DEBUG | |
101 | #define PRINTK(args...) printf(args) | |
102 | #else | |
103 | #define PRINTK(args...) | |
104 | #endif | |
105 | ||
106 | ||
107 | /*------------------------------------------------------------------------ | |
108 | * | |
109 | * The internal workings of the driver. If you are changing anything | |
110 | * here with the SMC stuff, you should have the datasheet and know | |
111 | * what you are doing. | |
112 | * | |
113 | *------------------------------------------------------------------------ | |
114 | */ | |
115 | #define CARDNAME "LAN91C96" | |
116 | ||
117 | #define SMC_BASE_ADDRESS CONFIG_LAN91C96_BASE | |
118 | ||
119 | #define SMC_DEV_NAME "LAN91C96" | |
120 | #define SMC_ALLOC_MAX_TRY 5 | |
121 | #define SMC_TX_TIMEOUT 30 | |
122 | ||
123 | #define ETH_ZLEN 60 | |
124 | ||
125 | #ifdef CONFIG_LAN91C96_USE_32_BIT | |
126 | #define USE_32_BIT 1 | |
127 | #else | |
128 | #undef USE_32_BIT | |
129 | #endif | |
130 | ||
131 | /*----------------------------------------------------------------- | |
132 | * | |
133 | * The driver can be entered at any of the following entry points. | |
134 | * | |
135 | *----------------------------------------------------------------- | |
136 | */ | |
137 | ||
138 | extern int eth_init (bd_t * bd); | |
139 | extern void eth_halt (void); | |
140 | extern int eth_rx (void); | |
141 | extern int eth_send (volatile void *packet, int length); | |
39539887 | 142 | #if 0 |
45219c46 | 143 | static int smc_hw_init (void); |
39539887 | 144 | #endif |
45219c46 WD |
145 | |
146 | /* | |
147 | * This is called by register_netdev(). It is responsible for | |
148 | * checking the portlist for the SMC9000 series chipset. If it finds | |
149 | * one, then it will initialize the device, find the hardware information, | |
150 | * and sets up the appropriate device parameters. | |
151 | * NOTE: Interrupts are *OFF* when this procedure is called. | |
152 | * | |
153 | * NB:This shouldn't be static since it is referred to externally. | |
154 | */ | |
155 | int smc_init (void); | |
156 | ||
157 | /* | |
158 | * This is called by unregister_netdev(). It is responsible for | |
159 | * cleaning up before the driver is finally unregistered and discarded. | |
160 | */ | |
161 | void smc_destructor (void); | |
162 | ||
163 | /* | |
164 | * The kernel calls this function when someone wants to use the device, | |
165 | * typically 'ifconfig ethX up'. | |
166 | */ | |
5ca26799 | 167 | static int smc_open (bd_t *bd); |
45219c46 WD |
168 | |
169 | ||
170 | /* | |
171 | * This is called by the kernel in response to 'ifconfig ethX down'. It | |
172 | * is responsible for cleaning up everything that the open routine | |
173 | * does, and maybe putting the card into a powerdown state. | |
174 | */ | |
175 | static int smc_close (void); | |
176 | ||
177 | /* | |
178 | * This is a separate procedure to handle the receipt of a packet, to | |
179 | * leave the interrupt code looking slightly cleaner | |
180 | */ | |
181 | static int smc_rcv (void); | |
182 | ||
5ca26799 WD |
183 | /* See if a MAC address is defined in the current environment. If so use it. If not |
184 | . print a warning and set the environment and other globals with the default. | |
185 | . If an EEPROM is present it really should be consulted. | |
186 | */ | |
187 | int smc_get_ethaddr(bd_t *bd); | |
d52fb7e3 | 188 | int get_rom_mac(unsigned char *v_rom_mac); |
45219c46 | 189 | |
45219c46 WD |
190 | /* ------------------------------------------------------------ |
191 | * Internal routines | |
192 | * ------------------------------------------------------------ | |
193 | */ | |
194 | ||
d52fb7e3 | 195 | static unsigned char smc_mac_addr[] = { 0xc0, 0x00, 0x00, 0x1b, 0x62, 0x9c }; |
45219c46 WD |
196 | |
197 | /* | |
198 | * This function must be called before smc_open() if you want to override | |
199 | * the default mac address. | |
200 | */ | |
201 | ||
d52fb7e3 | 202 | void smc_set_mac_addr (const unsigned char *addr) |
45219c46 WD |
203 | { |
204 | int i; | |
205 | ||
206 | for (i = 0; i < sizeof (smc_mac_addr); i++) { | |
207 | smc_mac_addr[i] = addr[i]; | |
208 | } | |
209 | } | |
210 | ||
211 | /* | |
212 | * smc_get_macaddr is no longer used. If you want to override the default | |
213 | * mac address, call smc_get_mac_addr as a part of the board initialisation. | |
214 | */ | |
215 | ||
216 | #if 0 | |
217 | void smc_get_macaddr (byte * addr) | |
218 | { | |
219 | /* MAC ADDRESS AT FLASHBLOCK 1 / OFFSET 0x10 */ | |
220 | unsigned char *dnp1110_mac = (unsigned char *) (0xE8000000 + 0x20010); | |
221 | int i; | |
222 | ||
223 | ||
224 | for (i = 0; i < 6; i++) { | |
225 | addr[0] = *(dnp1110_mac + 0); | |
226 | addr[1] = *(dnp1110_mac + 1); | |
227 | addr[2] = *(dnp1110_mac + 2); | |
228 | addr[3] = *(dnp1110_mac + 3); | |
229 | addr[4] = *(dnp1110_mac + 4); | |
230 | addr[5] = *(dnp1110_mac + 5); | |
231 | } | |
232 | } | |
233 | #endif /* 0 */ | |
234 | ||
235 | /*********************************************** | |
236 | * Show available memory * | |
237 | ***********************************************/ | |
238 | void dump_memory_info (void) | |
239 | { | |
240 | word mem_info; | |
241 | word old_bank; | |
242 | ||
243 | old_bank = SMC_inw (LAN91C96_BANK_SELECT) & 0xF; | |
244 | ||
245 | SMC_SELECT_BANK (0); | |
246 | mem_info = SMC_inw (LAN91C96_MIR); | |
247 | PRINTK2 ("Memory: %4d available\n", (mem_info >> 8) * 2048); | |
248 | ||
249 | SMC_SELECT_BANK (old_bank); | |
250 | } | |
251 | ||
252 | /* | |
253 | * A rather simple routine to print out a packet for debugging purposes. | |
254 | */ | |
255 | #if SMC_DEBUG > 2 | |
256 | static void print_packet (byte *, int); | |
257 | #endif | |
258 | ||
259 | /* #define tx_done(dev) 1 */ | |
260 | ||
261 | ||
45219c46 WD |
262 | /* this does a soft reset on the device */ |
263 | static void smc_reset (void); | |
264 | ||
265 | /* Enable Interrupts, Receive, and Transmit */ | |
266 | static void smc_enable (void); | |
267 | ||
268 | /* this puts the device in an inactive state */ | |
269 | static void smc_shutdown (void); | |
270 | ||
271 | ||
272 | static int poll4int (byte mask, int timeout) | |
273 | { | |
274 | int tmo = get_timer (0) + timeout * CFG_HZ; | |
275 | int is_timeout = 0; | |
276 | word old_bank = SMC_inw (LAN91C96_BANK_SELECT); | |
277 | ||
278 | PRINTK2 ("Polling...\n"); | |
279 | SMC_SELECT_BANK (2); | |
280 | while ((SMC_inw (LAN91C96_INT_STATS) & mask) == 0) { | |
281 | if (get_timer (0) >= tmo) { | |
282 | is_timeout = 1; | |
283 | break; | |
284 | } | |
285 | } | |
286 | ||
287 | /* restore old bank selection */ | |
288 | SMC_SELECT_BANK (old_bank); | |
289 | ||
290 | if (is_timeout) | |
291 | return 1; | |
292 | else | |
293 | return 0; | |
294 | } | |
295 | ||
296 | /* | |
297 | * Function: smc_reset( void ) | |
298 | * Purpose: | |
1b769881 JCPV |
299 | * This sets the SMC91111 chip to its normal state, hopefully from whatever |
300 | * mess that any other DOS driver has put it in. | |
45219c46 WD |
301 | * |
302 | * Maybe I should reset more registers to defaults in here? SOFTRST should | |
303 | * do that for me. | |
304 | * | |
305 | * Method: | |
306 | * 1. send a SOFT RESET | |
307 | * 2. wait for it to finish | |
308 | * 3. enable autorelease mode | |
309 | * 4. reset the memory management unit | |
310 | * 5. clear all interrupts | |
311 | * | |
312 | */ | |
313 | static void smc_reset (void) | |
314 | { | |
315 | PRINTK2 ("%s:smc_reset\n", SMC_DEV_NAME); | |
316 | ||
317 | /* This resets the registers mostly to defaults, but doesn't | |
318 | affect EEPROM. That seems unnecessary */ | |
319 | SMC_SELECT_BANK (0); | |
320 | SMC_outw (LAN91C96_RCR_SOFT_RST, LAN91C96_RCR); | |
321 | ||
322 | udelay (10); | |
323 | ||
324 | /* Disable transmit and receive functionality */ | |
325 | SMC_outw (0, LAN91C96_RCR); | |
326 | SMC_outw (0, LAN91C96_TCR); | |
327 | ||
328 | /* set the control register */ | |
329 | SMC_SELECT_BANK (1); | |
330 | SMC_outw (SMC_inw (LAN91C96_CONTROL) | LAN91C96_CTR_BIT_8, | |
331 | LAN91C96_CONTROL); | |
332 | ||
333 | /* Disable all interrupts */ | |
334 | SMC_outb (0, LAN91C96_INT_MASK); | |
335 | } | |
336 | ||
337 | /* | |
338 | * Function: smc_enable | |
339 | * Purpose: let the chip talk to the outside work | |
340 | * Method: | |
341 | * 1. Initialize the Memory Configuration Register | |
342 | * 2. Enable the transmitter | |
343 | * 3. Enable the receiver | |
344 | */ | |
345 | static void smc_enable () | |
346 | { | |
347 | PRINTK2 ("%s:smc_enable\n", SMC_DEV_NAME); | |
348 | SMC_SELECT_BANK (0); | |
349 | ||
350 | /* Initialize the Memory Configuration Register. See page | |
351 | 49 of the LAN91C96 data sheet for details. */ | |
352 | SMC_outw (LAN91C96_MCR_TRANSMIT_PAGES, LAN91C96_MCR); | |
353 | ||
354 | /* Initialize the Transmit Control Register */ | |
355 | SMC_outw (LAN91C96_TCR_TXENA, LAN91C96_TCR); | |
356 | /* Initialize the Receive Control Register | |
357 | * FIXME: | |
358 | * The promiscuous bit set because I could not receive ARP reply | |
359 | * packets from the server when I send a ARP request. It only works | |
360 | * when I set the promiscuous bit | |
361 | */ | |
362 | SMC_outw (LAN91C96_RCR_RXEN | LAN91C96_RCR_PRMS, LAN91C96_RCR); | |
363 | } | |
364 | ||
365 | /* | |
366 | * Function: smc_shutdown | |
367 | * Purpose: closes down the SMC91xxx chip. | |
368 | * Method: | |
369 | * 1. zero the interrupt mask | |
370 | * 2. clear the enable receive flag | |
371 | * 3. clear the enable xmit flags | |
372 | * | |
373 | * TODO: | |
374 | * (1) maybe utilize power down mode. | |
375 | * Why not yet? Because while the chip will go into power down mode, | |
376 | * the manual says that it will wake up in response to any I/O requests | |
377 | * in the register space. Empirical results do not show this working. | |
378 | */ | |
379 | static void smc_shutdown () | |
380 | { | |
381 | PRINTK2 (CARDNAME ":smc_shutdown\n"); | |
382 | ||
383 | /* no more interrupts for me */ | |
384 | SMC_SELECT_BANK (2); | |
385 | SMC_outb (0, LAN91C96_INT_MASK); | |
386 | ||
387 | /* and tell the card to stay away from that nasty outside world */ | |
388 | SMC_SELECT_BANK (0); | |
389 | SMC_outb (0, LAN91C96_RCR); | |
390 | SMC_outb (0, LAN91C96_TCR); | |
391 | } | |
392 | ||
393 | ||
394 | /* | |
395 | * Function: smc_hardware_send_packet(struct net_device * ) | |
396 | * Purpose: | |
397 | * This sends the actual packet to the SMC9xxx chip. | |
398 | * | |
399 | * Algorithm: | |
1b769881 | 400 | * First, see if a saved_skb is available. |
45219c46 WD |
401 | * ( this should NOT be called if there is no 'saved_skb' |
402 | * Now, find the packet number that the chip allocated | |
403 | * Point the data pointers at it in memory | |
404 | * Set the length word in the chip's memory | |
405 | * Dump the packet to chip memory | |
406 | * Check if a last byte is needed ( odd length packet ) | |
407 | * if so, set the control flag right | |
1b769881 | 408 | * Tell the card to send it |
45219c46 | 409 | * Enable the transmit interrupt, so I know if it failed |
1b769881 | 410 | * Free the kernel data if I actually sent it. |
45219c46 WD |
411 | */ |
412 | static int smc_send_packet (volatile void *packet, int packet_length) | |
413 | { | |
414 | byte packet_no; | |
415 | unsigned long ioaddr; | |
416 | byte *buf; | |
417 | int length; | |
418 | int numPages; | |
419 | int try = 0; | |
420 | int time_out; | |
421 | byte status; | |
422 | ||
423 | ||
424 | PRINTK3 ("%s:smc_hardware_send_packet\n", SMC_DEV_NAME); | |
425 | ||
426 | length = ETH_ZLEN < packet_length ? packet_length : ETH_ZLEN; | |
427 | ||
428 | /* allocate memory | |
429 | ** The MMU wants the number of pages to be the number of 256 bytes | |
430 | ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) ) | |
431 | ** | |
432 | ** The 91C111 ignores the size bits, but the code is left intact | |
433 | ** for backwards and future compatibility. | |
434 | ** | |
435 | ** Pkt size for allocating is data length +6 (for additional status | |
436 | ** words, length and ctl!) | |
437 | ** | |
438 | ** If odd size then last byte is included in this header. | |
439 | */ | |
440 | numPages = ((length & 0xfffe) + 6); | |
441 | numPages >>= 8; /* Divide by 256 */ | |
442 | ||
443 | if (numPages > 7) { | |
444 | printf ("%s: Far too big packet error. \n", SMC_DEV_NAME); | |
445 | return 0; | |
446 | } | |
447 | ||
448 | /* now, try to allocate the memory */ | |
449 | ||
450 | SMC_SELECT_BANK (2); | |
451 | SMC_outw (LAN91C96_MMUCR_ALLOC_TX | numPages, LAN91C96_MMU); | |
452 | ||
453 | again: | |
454 | try++; | |
455 | time_out = MEMORY_WAIT_TIME; | |
456 | do { | |
457 | status = SMC_inb (LAN91C96_INT_STATS); | |
458 | if (status & LAN91C96_IST_ALLOC_INT) { | |
459 | ||
460 | SMC_outb (LAN91C96_IST_ALLOC_INT, LAN91C96_INT_STATS); | |
461 | break; | |
462 | } | |
463 | } while (--time_out); | |
464 | ||
465 | if (!time_out) { | |
466 | PRINTK2 ("%s: memory allocation, try %d failed ...\n", | |
467 | SMC_DEV_NAME, try); | |
468 | if (try < SMC_ALLOC_MAX_TRY) | |
469 | goto again; | |
470 | else | |
471 | return 0; | |
472 | } | |
473 | ||
474 | PRINTK2 ("%s: memory allocation, try %d succeeded ...\n", | |
475 | SMC_DEV_NAME, try); | |
476 | ||
477 | /* I can send the packet now.. */ | |
478 | ||
479 | ioaddr = SMC_BASE_ADDRESS; | |
480 | ||
481 | buf = (byte *) packet; | |
482 | ||
483 | /* If I get here, I _know_ there is a packet slot waiting for me */ | |
484 | packet_no = SMC_inb (LAN91C96_ARR); | |
485 | if (packet_no & LAN91C96_ARR_FAILED) { | |
486 | /* or isn't there? BAD CHIP! */ | |
487 | printf ("%s: Memory allocation failed. \n", SMC_DEV_NAME); | |
488 | return 0; | |
489 | } | |
490 | ||
491 | /* we have a packet address, so tell the card to use it */ | |
492 | SMC_outb (packet_no, LAN91C96_PNR); | |
493 | ||
494 | /* point to the beginning of the packet */ | |
495 | SMC_outw (LAN91C96_PTR_AUTO_INCR, LAN91C96_POINTER); | |
496 | ||
497 | PRINTK3 ("%s: Trying to xmit packet of length %x\n", | |
498 | SMC_DEV_NAME, length); | |
499 | ||
500 | #if SMC_DEBUG > 2 | |
501 | printf ("Transmitting Packet\n"); | |
502 | print_packet (buf, length); | |
503 | #endif | |
504 | ||
505 | /* send the packet length ( +6 for status, length and ctl byte ) | |
506 | and the status word ( set to zeros ) */ | |
507 | #ifdef USE_32_BIT | |
508 | SMC_outl ((length + 6) << 16, LAN91C96_DATA_HIGH); | |
509 | #else | |
510 | SMC_outw (0, LAN91C96_DATA_HIGH); | |
511 | /* send the packet length ( +6 for status words, length, and ctl */ | |
512 | SMC_outw ((length + 6), LAN91C96_DATA_HIGH); | |
513 | #endif /* USE_32_BIT */ | |
514 | ||
515 | /* send the actual data | |
516 | * I _think_ it's faster to send the longs first, and then | |
517 | * mop up by sending the last word. It depends heavily | |
518 | * on alignment, at least on the 486. Maybe it would be | |
519 | * a good idea to check which is optimal? But that could take | |
520 | * almost as much time as is saved? | |
521 | */ | |
522 | #ifdef USE_32_BIT | |
523 | SMC_outsl (LAN91C96_DATA_HIGH, buf, length >> 2); | |
524 | if (length & 0x2) | |
525 | SMC_outw (*((word *) (buf + (length & 0xFFFFFFFC))), | |
526 | LAN91C96_DATA_HIGH); | |
527 | #else | |
528 | SMC_outsw (LAN91C96_DATA_HIGH, buf, (length) >> 1); | |
529 | #endif /* USE_32_BIT */ | |
530 | ||
531 | /* Send the last byte, if there is one. */ | |
532 | if ((length & 1) == 0) { | |
533 | SMC_outw (0, LAN91C96_DATA_HIGH); | |
534 | } else { | |
535 | SMC_outw (buf[length - 1] | 0x2000, LAN91C96_DATA_HIGH); | |
536 | } | |
537 | ||
538 | /* and let the chipset deal with it */ | |
539 | SMC_outw (LAN91C96_MMUCR_ENQUEUE, LAN91C96_MMU); | |
540 | ||
541 | /* poll for TX INT */ | |
542 | if (poll4int (LAN91C96_MSK_TX_INT, SMC_TX_TIMEOUT)) { | |
543 | /* sending failed */ | |
544 | PRINTK2 ("%s: TX timeout, sending failed...\n", SMC_DEV_NAME); | |
545 | ||
546 | /* release packet */ | |
547 | SMC_outw (LAN91C96_MMUCR_RELEASE_TX, LAN91C96_MMU); | |
548 | ||
549 | /* wait for MMU getting ready (low) */ | |
550 | while (SMC_inw (LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) { | |
551 | udelay (10); | |
552 | } | |
553 | ||
554 | PRINTK2 ("MMU ready\n"); | |
555 | ||
556 | ||
557 | return 0; | |
558 | } else { | |
559 | /* ack. int */ | |
560 | SMC_outw (LAN91C96_IST_TX_INT, LAN91C96_INT_STATS); | |
561 | ||
562 | PRINTK2 ("%s: Sent packet of length %d \n", SMC_DEV_NAME, length); | |
563 | ||
564 | /* release packet */ | |
565 | SMC_outw (LAN91C96_MMUCR_RELEASE_TX, LAN91C96_MMU); | |
566 | ||
567 | /* wait for MMU getting ready (low) */ | |
568 | while (SMC_inw (LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) { | |
569 | udelay (10); | |
570 | } | |
571 | ||
572 | PRINTK2 ("MMU ready\n"); | |
573 | } | |
574 | ||
575 | return length; | |
576 | } | |
577 | ||
578 | /*------------------------------------------------------------------------- | |
579 | * smc_destructor( struct net_device * dev ) | |
580 | * Input parameters: | |
581 | * dev, pointer to the device structure | |
582 | * | |
583 | * Output: | |
584 | * None. | |
585 | *-------------------------------------------------------------------------- | |
586 | */ | |
587 | void smc_destructor () | |
588 | { | |
589 | PRINTK2 (CARDNAME ":smc_destructor\n"); | |
590 | } | |
591 | ||
592 | ||
593 | /* | |
594 | * Open and Initialize the board | |
595 | * | |
596 | * Set up everything, reset the card, etc .. | |
597 | * | |
598 | */ | |
5ca26799 | 599 | static int smc_open (bd_t *bd) |
45219c46 | 600 | { |
5ca26799 | 601 | int i, err; /* used to set hw ethernet address */ |
45219c46 WD |
602 | |
603 | PRINTK2 ("%s:smc_open\n", SMC_DEV_NAME); | |
604 | ||
605 | /* reset the hardware */ | |
606 | ||
607 | smc_reset (); | |
608 | smc_enable (); | |
609 | ||
610 | SMC_SELECT_BANK (1); | |
611 | ||
5ca26799 WD |
612 | err = smc_get_ethaddr (bd); /* set smc_mac_addr, and sync it with u-boot globals */ |
613 | if (err < 0) { | |
614 | memset (bd->bi_enetaddr, 0, 6); /* hack to make error stick! upper code will abort if not set */ | |
615 | return (-1); /* upper code ignores this, but NOT bi_enetaddr */ | |
616 | } | |
617 | #ifdef USE_32_BIT | |
45219c46 WD |
618 | for (i = 0; i < 6; i += 2) { |
619 | word address; | |
620 | ||
621 | address = smc_mac_addr[i + 1] << 8; | |
622 | address |= smc_mac_addr[i]; | |
623 | SMC_outw (address, LAN91C96_IA0 + i); | |
624 | } | |
a56bd922 | 625 | #else |
5ca26799 WD |
626 | for (i = 0; i < 6; i++) |
627 | SMC_outb (smc_mac_addr[i], LAN91C96_IA0 + i); | |
628 | #endif | |
45219c46 WD |
629 | return 0; |
630 | } | |
631 | ||
632 | /*------------------------------------------------------------- | |
633 | * | |
634 | * smc_rcv - receive a packet from the card | |
635 | * | |
636 | * There is ( at least ) a packet waiting to be read from | |
637 | * chip-memory. | |
638 | * | |
639 | * o Read the status | |
640 | * o If an error, record it | |
641 | * o otherwise, read in the packet | |
642 | *------------------------------------------------------------- | |
643 | */ | |
644 | static int smc_rcv () | |
645 | { | |
646 | int packet_number; | |
647 | word status; | |
648 | word packet_length; | |
649 | int is_error = 0; | |
650 | ||
651 | #ifdef USE_32_BIT | |
652 | dword stat_len; | |
653 | #endif | |
654 | ||
655 | ||
656 | SMC_SELECT_BANK (2); | |
657 | packet_number = SMC_inw (LAN91C96_FIFO); | |
658 | ||
659 | if (packet_number & LAN91C96_FIFO_RXEMPTY) { | |
660 | return 0; | |
661 | } | |
662 | ||
663 | PRINTK3 ("%s:smc_rcv\n", SMC_DEV_NAME); | |
664 | /* start reading from the start of the packet */ | |
665 | SMC_outw (LAN91C96_PTR_READ | LAN91C96_PTR_RCV | | |
666 | LAN91C96_PTR_AUTO_INCR, LAN91C96_POINTER); | |
667 | ||
668 | /* First two words are status and packet_length */ | |
669 | #ifdef USE_32_BIT | |
670 | stat_len = SMC_inl (LAN91C96_DATA_HIGH); | |
671 | status = stat_len & 0xffff; | |
672 | packet_length = stat_len >> 16; | |
673 | #else | |
674 | status = SMC_inw (LAN91C96_DATA_HIGH); | |
675 | packet_length = SMC_inw (LAN91C96_DATA_HIGH); | |
676 | #endif | |
677 | ||
678 | packet_length &= 0x07ff; /* mask off top bits */ | |
679 | ||
680 | PRINTK2 ("RCV: STATUS %4x LENGTH %4x\n", status, packet_length); | |
681 | ||
682 | if (!(status & FRAME_FILTER)) { | |
683 | /* Adjust for having already read the first two words */ | |
684 | packet_length -= 4; /*4; */ | |
685 | ||
686 | ||
45219c46 WD |
687 | /* set odd length for bug in LAN91C111, */ |
688 | /* which never sets RS_ODDFRAME */ | |
689 | /* TODO ? */ | |
690 | ||
691 | ||
692 | #ifdef USE_32_BIT | |
693 | PRINTK3 (" Reading %d dwords (and %d bytes) \n", | |
694 | packet_length >> 2, packet_length & 3); | |
695 | /* QUESTION: Like in the TX routine, do I want | |
696 | to send the DWORDs or the bytes first, or some | |
697 | mixture. A mixture might improve already slow PIO | |
698 | performance */ | |
699 | SMC_insl (LAN91C96_DATA_HIGH, NetRxPackets[0], packet_length >> 2); | |
700 | /* read the left over bytes */ | |
701 | if (packet_length & 3) { | |
702 | int i; | |
703 | ||
704 | byte *tail = (byte *) (NetRxPackets[0] + (packet_length & ~3)); | |
705 | dword leftover = SMC_inl (LAN91C96_DATA_HIGH); | |
706 | ||
707 | for (i = 0; i < (packet_length & 3); i++) | |
708 | *tail++ = (byte) (leftover >> (8 * i)) & 0xff; | |
709 | } | |
710 | #else | |
711 | PRINTK3 (" Reading %d words and %d byte(s) \n", | |
712 | (packet_length >> 1), packet_length & 1); | |
713 | SMC_insw (LAN91C96_DATA_HIGH, NetRxPackets[0], packet_length >> 1); | |
714 | ||
715 | #endif /* USE_32_BIT */ | |
716 | ||
717 | #if SMC_DEBUG > 2 | |
718 | printf ("Receiving Packet\n"); | |
719 | print_packet (NetRxPackets[0], packet_length); | |
720 | #endif | |
721 | } else { | |
722 | /* error ... */ | |
723 | /* TODO ? */ | |
724 | is_error = 1; | |
725 | } | |
726 | ||
727 | while (SMC_inw (LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) | |
728 | udelay (1); /* Wait until not busy */ | |
729 | ||
730 | /* error or good, tell the card to get rid of this packet */ | |
731 | SMC_outw (LAN91C96_MMUCR_RELEASE_RX, LAN91C96_MMU); | |
732 | ||
733 | while (SMC_inw (LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) | |
734 | udelay (1); /* Wait until not busy */ | |
735 | ||
736 | if (!is_error) { | |
737 | /* Pass the packet up to the protocol layers. */ | |
738 | NetReceive (NetRxPackets[0], packet_length); | |
739 | return packet_length; | |
740 | } else { | |
741 | return 0; | |
742 | } | |
743 | ||
744 | } | |
745 | ||
746 | /*---------------------------------------------------- | |
747 | * smc_close | |
748 | * | |
749 | * this makes the board clean up everything that it can | |
750 | * and not talk to the outside world. Caused by | |
751 | * an 'ifconfig ethX down' | |
752 | * | |
753 | -----------------------------------------------------*/ | |
754 | static int smc_close () | |
755 | { | |
756 | PRINTK2 ("%s:smc_close\n", SMC_DEV_NAME); | |
757 | ||
758 | /* clear everything */ | |
759 | smc_shutdown (); | |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
764 | #if SMC_DEBUG > 2 | |
765 | static void print_packet (byte * buf, int length) | |
766 | { | |
767 | #if 0 | |
768 | int i; | |
769 | int remainder; | |
770 | int lines; | |
771 | ||
772 | printf ("Packet of length %d \n", length); | |
773 | ||
774 | lines = length / 16; | |
775 | remainder = length % 16; | |
776 | ||
777 | for (i = 0; i < lines; i++) { | |
778 | int cur; | |
779 | ||
780 | for (cur = 0; cur < 8; cur++) { | |
781 | byte a, b; | |
782 | ||
783 | a = *(buf++); | |
784 | b = *(buf++); | |
785 | printf ("%02x%02x ", a, b); | |
786 | } | |
787 | printf ("\n"); | |
788 | } | |
789 | for (i = 0; i < remainder / 2; i++) { | |
790 | byte a, b; | |
791 | ||
792 | a = *(buf++); | |
793 | b = *(buf++); | |
794 | printf ("%02x%02x ", a, b); | |
795 | } | |
796 | printf ("\n"); | |
797 | #endif /* 0 */ | |
798 | } | |
799 | #endif /* SMC_DEBUG > 2 */ | |
800 | ||
801 | int eth_init (bd_t * bd) | |
802 | { | |
5ca26799 | 803 | return (smc_open(bd)); |
45219c46 WD |
804 | } |
805 | ||
806 | void eth_halt () | |
807 | { | |
808 | smc_close (); | |
809 | } | |
810 | ||
811 | int eth_rx () | |
812 | { | |
813 | return smc_rcv (); | |
814 | } | |
815 | ||
816 | int eth_send (volatile void *packet, int length) | |
817 | { | |
818 | return smc_send_packet (packet, length); | |
819 | } | |
820 | ||
45219c46 | 821 | |
39539887 | 822 | #if 0 |
45219c46 WD |
823 | /*------------------------------------------------------------------------- |
824 | * smc_hw_init() | |
825 | * | |
826 | * Function: | |
827 | * Reset and enable the device, check if the I/O space location | |
828 | * is correct | |
829 | * | |
830 | * Input parameters: | |
831 | * None | |
832 | * | |
833 | * Output: | |
834 | * 0 --> success | |
835 | * 1 --> error | |
836 | *-------------------------------------------------------------------------- | |
837 | */ | |
838 | static int smc_hw_init () | |
839 | { | |
840 | unsigned short status_test; | |
841 | ||
842 | /* The attribute register of the LAN91C96 is located at address | |
843 | 0x0e000000 on the lubbock platform */ | |
844 | volatile unsigned *attaddr = (unsigned *) (0x0e000000); | |
845 | ||
846 | /* first reset, then enable the device. Sequence is critical */ | |
847 | attaddr[LAN91C96_ECOR] |= LAN91C96_ECOR_SRESET; | |
848 | udelay (100); | |
849 | attaddr[LAN91C96_ECOR] &= ~LAN91C96_ECOR_SRESET; | |
850 | attaddr[LAN91C96_ECOR] |= LAN91C96_ECOR_ENABLE; | |
851 | ||
852 | /* force 16-bit mode */ | |
853 | attaddr[LAN91C96_ECSR] &= ~LAN91C96_ECSR_IOIS8; | |
854 | udelay (100); | |
855 | ||
856 | /* check if the I/O address is correct, the upper byte of the | |
857 | bank select register should read 0x33 */ | |
858 | ||
859 | status_test = SMC_inw (LAN91C96_BANK_SELECT); | |
860 | if ((status_test & 0xFF00) != 0x3300) { | |
861 | printf ("Failed to initialize ethernetchip\n"); | |
862 | return 1; | |
863 | } | |
864 | return 0; | |
865 | } | |
39539887 | 866 | #endif /* 0 */ |
45219c46 | 867 | |
1b769881 | 868 | #endif /* CONFIG_CMD_NET */ |
45219c46 | 869 | |
5ca26799 WD |
870 | |
871 | /* smc_get_ethaddr (bd_t * bd) | |
872 | * | |
873 | * This checks both the environment and the ROM for an ethernet address. If | |
874 | * found, the environment takes precedence. | |
875 | */ | |
876 | ||
877 | int smc_get_ethaddr (bd_t * bd) | |
878 | { | |
879 | int env_size = 0; | |
880 | int rom_valid = 0; | |
881 | int env_present = 0; | |
882 | int reg = 0; | |
883 | char *s = NULL; | |
884 | char *e = NULL; | |
885 | char *v_mac, es[] = "11:22:33:44:55:66"; | |
d52fb7e3 | 886 | char s_env_mac[64]; |
5ca26799 WD |
887 | uchar v_env_mac[6]; |
888 | uchar v_rom_mac[6]; | |
889 | ||
890 | env_size = getenv_r ("ethaddr", s_env_mac, sizeof (s_env_mac)); | |
891 | if (env_size != sizeof(es)) { /* Ignore if env is bad or not set */ | |
892 | printf ("\n*** Warning: ethaddr is not set properly, ignoring!!\n"); | |
893 | } else { | |
894 | env_present = 1; | |
895 | s = s_env_mac; | |
896 | ||
897 | for (reg = 0; reg < 6; ++reg) { /* turn string into mac value */ | |
898 | v_env_mac[reg] = s ? simple_strtoul (s, &e, 16) : 0; | |
899 | if (s) | |
900 | s = (*e) ? e + 1 : e; | |
901 | } | |
902 | } | |
903 | ||
904 | rom_valid = get_rom_mac (v_rom_mac); /* get ROM mac value if any */ | |
905 | ||
906 | if (!env_present) { /* if NO env */ | |
907 | if (rom_valid) { /* but ROM is valid */ | |
d52fb7e3 | 908 | v_mac = (char *)v_rom_mac; |
5ca26799 WD |
909 | sprintf (s_env_mac, "%02X:%02X:%02X:%02X:%02X:%02X", |
910 | v_mac[0], v_mac[1], v_mac[2], v_mac[3], | |
911 | v_mac[4], v_mac[5]); | |
912 | setenv ("ethaddr", s_env_mac); | |
913 | } else { /* no env, bad ROM */ | |
914 | printf ("\n*** ERROR: ethaddr is NOT set !!\n"); | |
915 | return (-1); | |
916 | } | |
917 | } else { /* good env, don't care ROM */ | |
d52fb7e3 | 918 | v_mac = (char *)v_env_mac; /* always use a good env over a ROM */ |
5ca26799 WD |
919 | } |
920 | ||
921 | if (env_present && rom_valid) { /* if both env and ROM are good */ | |
922 | if (memcmp (v_env_mac, v_rom_mac, 6) != 0) { | |
923 | printf ("\nWarning: MAC addresses don't match:\n"); | |
924 | printf ("\tHW MAC address: " | |
925 | "%02X:%02X:%02X:%02X:%02X:%02X\n", | |
926 | v_rom_mac[0], v_rom_mac[1], | |
927 | v_rom_mac[2], v_rom_mac[3], | |
928 | v_rom_mac[4], v_rom_mac[5] ); | |
929 | printf ("\t\"ethaddr\" value: " | |
930 | "%02X:%02X:%02X:%02X:%02X:%02X\n", | |
931 | v_env_mac[0], v_env_mac[1], | |
932 | v_env_mac[2], v_env_mac[3], | |
933 | v_env_mac[4], v_env_mac[5]) ; | |
934 | debug ("### Set MAC addr from environment\n"); | |
935 | } | |
936 | } | |
937 | memcpy (bd->bi_enetaddr, v_mac, 6); /* update global address to match env (allows env changing) */ | |
d52fb7e3 | 938 | smc_set_mac_addr ((unsigned char *)v_mac); /* use old function to update smc default */ |
5ca26799 WD |
939 | PRINTK("Using MAC Address %02X:%02X:%02X:%02X:%02X:%02X\n", v_mac[0], v_mac[1], |
940 | v_mac[2], v_mac[3], v_mac[4], v_mac[5]); | |
941 | return (0); | |
942 | } | |
943 | ||
a56bd922 | 944 | /* |
5ca26799 WD |
945 | * get_rom_mac() |
946 | * Note, this has omly been tested for the OMAP730 P2. | |
947 | */ | |
948 | ||
d52fb7e3 | 949 | int get_rom_mac (unsigned char *v_rom_mac) |
5ca26799 WD |
950 | { |
951 | #ifdef HARDCODE_MAC /* used for testing or to supress run time warnings */ | |
952 | char hw_mac_addr[] = { 0x02, 0x80, 0xad, 0x20, 0x31, 0xb8 }; | |
953 | ||
954 | memcpy (v_rom_mac, hw_mac_addr, 6); | |
955 | return (1); | |
956 | #else | |
957 | int i; | |
958 | SMC_SELECT_BANK (1); | |
959 | for (i=0; i<6; i++) | |
960 | { | |
961 | v_rom_mac[i] = SMC_inb (LAN91C96_IA0 + i); | |
962 | } | |
963 | return (1); | |
964 | #endif | |
965 | } | |
966 | ||
45219c46 | 967 | #endif /* CONFIG_DRIVER_LAN91C96 */ |