1 /**************************************************************************
2 ETHERBOOT - BOOTP/TFTP Bootstrap Program
3
4 Author: Martin Renters.
5 Date: Mar 22 1995
6
7 This code is based heavily on David Greenman's if_ed.c driver and
8 Andres Vega Garcia's if_ep.c driver.
9
10 Copyright (C) 1993-1994, David Greenman, Martin Renters.
11 Copyright (C) 1993-1995, Andres Vega Garcia.
12 Copyright (C) 1995, Serge Babkin.
13 This software may be used, modified, copied, distributed, and sold, in
14 both source and binary form provided that the above copyright and these
15 terms are retained. Under no circumstances are the authors responsible for
16 the proper functioning of this software, nor do the authors assume any
17 responsibility for damages incurred with its use.
18
19 3c509 support added by Serge Babkin (babkin@hq.icb.chel.su)
20
21 $Id$
22
23 ***************************************************************************/
24
25 FILE_LICENCE ( BSD2 );
26
27 /* #define EDEBUG */
28
29 #include <ipxe/ethernet.h>
30 #include "etherboot.h"
31 #include "nic.h"
32 #include <ipxe/isa.h>
33 #include "3c509.h"
34
35 static enum { none, bnc, utp } connector = none; /* for 3C509 */
36
37 /**************************************************************************
38 ETH_RESET - Reset adapter
39 ***************************************************************************/
t5x9_disable(struct nic * nic)40 void t5x9_disable ( struct nic *nic ) {
41 /* stop card */
42 outw(RX_DISABLE, nic->ioaddr + EP_COMMAND);
43 outw(RX_DISCARD_TOP_PACK, nic->ioaddr + EP_COMMAND);
44 while (inw(nic->ioaddr + EP_STATUS) & S_COMMAND_IN_PROGRESS)
45 ;
46 outw(TX_DISABLE, nic->ioaddr + EP_COMMAND);
47 outw(STOP_TRANSCEIVER, nic->ioaddr + EP_COMMAND);
48 udelay(1000);
49 outw(RX_RESET, nic->ioaddr + EP_COMMAND);
50 outw(TX_RESET, nic->ioaddr + EP_COMMAND);
51 outw(C_INTR_LATCH, nic->ioaddr + EP_COMMAND);
52 outw(SET_RD_0_MASK, nic->ioaddr + EP_COMMAND);
53 outw(SET_INTR_MASK, nic->ioaddr + EP_COMMAND);
54 outw(SET_RX_FILTER, nic->ioaddr + EP_COMMAND);
55
56 /*
57 * wait for reset to complete
58 */
59 while (inw(nic->ioaddr + EP_STATUS) & S_COMMAND_IN_PROGRESS)
60 ;
61
62 GO_WINDOW(nic->ioaddr,0);
63
64 /* Disable the card */
65 outw(0, nic->ioaddr + EP_W0_CONFIG_CTRL);
66
67 /* Configure IRQ to none */
68 outw(SET_IRQ(0), nic->ioaddr + EP_W0_RESOURCE_CFG);
69 }
70
t509_enable(struct nic * nic)71 static void t509_enable ( struct nic *nic ) {
72 int i;
73
74 /* Enable the card */
75 GO_WINDOW(nic->ioaddr,0);
76 outw(ENABLE_DRQ_IRQ, nic->ioaddr + EP_W0_CONFIG_CTRL);
77
78 GO_WINDOW(nic->ioaddr,2);
79
80 /* Reload the ether_addr. */
81 for (i = 0; i < ETH_ALEN; i++)
82 outb(nic->node_addr[i], nic->ioaddr + EP_W2_ADDR_0 + i);
83
84 outw(RX_RESET, nic->ioaddr + EP_COMMAND);
85 outw(TX_RESET, nic->ioaddr + EP_COMMAND);
86
87 /* Window 1 is operating window */
88 GO_WINDOW(nic->ioaddr,1);
89 for (i = 0; i < 31; i++)
90 inb(nic->ioaddr + EP_W1_TX_STATUS);
91
92 /* get rid of stray intr's */
93 outw(ACK_INTR | 0xff, nic->ioaddr + EP_COMMAND);
94
95 outw(SET_RD_0_MASK | S_5_INTS, nic->ioaddr + EP_COMMAND);
96
97 outw(SET_INTR_MASK, nic->ioaddr + EP_COMMAND);
98
99 outw(SET_RX_FILTER | FIL_GROUP | FIL_INDIVIDUAL | FIL_BRDCST,
100 nic->ioaddr + EP_COMMAND);
101
102 /* configure BNC */
103 if (connector == bnc) {
104 outw(START_TRANSCEIVER, nic->ioaddr + EP_COMMAND);
105 udelay(1000);
106 }
107 /* configure UTP */
108 else if (connector == utp) {
109 GO_WINDOW(nic->ioaddr,4);
110 outw(ENABLE_UTP, nic->ioaddr + EP_W4_MEDIA_TYPE);
111 mdelay(2000); /* Give time for media to negotiate */
112 GO_WINDOW(nic->ioaddr,1);
113 }
114
115 /* start transceiver and receiver */
116 outw(RX_ENABLE, nic->ioaddr + EP_COMMAND);
117 outw(TX_ENABLE, nic->ioaddr + EP_COMMAND);
118
119 /* set early threshold for minimal packet length */
120 outw(SET_RX_EARLY_THRESH | ETH_ZLEN, nic->ioaddr + EP_COMMAND);
121 outw(SET_TX_START_THRESH | 16, nic->ioaddr + EP_COMMAND);
122 }
123
t509_reset(struct nic * nic)124 static void t509_reset ( struct nic *nic ) {
125 t5x9_disable ( nic );
126 t509_enable ( nic );
127 }
128
129 /**************************************************************************
130 ETH_TRANSMIT - Transmit a frame
131 ***************************************************************************/
132 static char padmap[] = {
133 0, 3, 2, 1};
134
t509_transmit(struct nic * nic,const char * d,unsigned int t,unsigned int s,const char * p)135 static void t509_transmit(
136 struct nic *nic,
137 const char *d, /* Destination */
138 unsigned int t, /* Type */
139 unsigned int s, /* size */
140 const char *p) /* Packet */
141 {
142 register unsigned int len;
143 int pad;
144 int status;
145
146 #ifdef EDEBUG
147 printf("{l=%d,t=%hX}",s+ETH_HLEN,t);
148 #endif
149
150 /* swap bytes of type */
151 t= htons(t);
152
153 len=s+ETH_HLEN; /* actual length of packet */
154 pad = padmap[len & 3];
155
156 /*
157 * The 3c509 automatically pads short packets to minimum ethernet length,
158 * but we drop packets that are too large. Perhaps we should truncate
159 * them instead?
160 */
161 if (len + pad > ETH_FRAME_LEN) {
162 return;
163 }
164
165 /* drop acknowledgements */
166 while ((status=inb(nic->ioaddr + EP_W1_TX_STATUS)) & TXS_COMPLETE ) {
167 if (status & (TXS_UNDERRUN|TXS_MAX_COLLISION|TXS_STATUS_OVERFLOW)) {
168 outw(TX_RESET, nic->ioaddr + EP_COMMAND);
169 outw(TX_ENABLE, nic->ioaddr + EP_COMMAND);
170 }
171 outb(0x0, nic->ioaddr + EP_W1_TX_STATUS);
172 }
173
174 while (inw(nic->ioaddr + EP_W1_FREE_TX) < (unsigned short)len + pad + 4)
175 ; /* no room in FIFO */
176
177 outw(len, nic->ioaddr + EP_W1_TX_PIO_WR_1);
178 outw(0x0, nic->ioaddr + EP_W1_TX_PIO_WR_1); /* Second dword meaningless */
179
180 /* write packet */
181 outsw(nic->ioaddr + EP_W1_TX_PIO_WR_1, d, ETH_ALEN/2);
182 outsw(nic->ioaddr + EP_W1_TX_PIO_WR_1, nic->node_addr, ETH_ALEN/2);
183 outw(t, nic->ioaddr + EP_W1_TX_PIO_WR_1);
184 outsw(nic->ioaddr + EP_W1_TX_PIO_WR_1, p, s / 2);
185 if (s & 1)
186 outb(*(p+s - 1), nic->ioaddr + EP_W1_TX_PIO_WR_1);
187
188 while (pad--)
189 outb(0, nic->ioaddr + EP_W1_TX_PIO_WR_1); /* Padding */
190
191 /* wait for Tx complete */
192 while((inw(nic->ioaddr + EP_STATUS) & S_COMMAND_IN_PROGRESS) != 0)
193 ;
194 }
195
196 /**************************************************************************
197 ETH_POLL - Wait for a frame
198 ***************************************************************************/
t509_poll(struct nic * nic,int retrieve)199 static int t509_poll(struct nic *nic, int retrieve)
200 {
201 /* common variables */
202 /* variables for 3C509 */
203 short status, cst;
204 register short rx_fifo;
205
206 cst=inw(nic->ioaddr + EP_STATUS);
207
208 #ifdef EDEBUG
209 if(cst & 0x1FFF)
210 printf("-%hX-",cst);
211 #endif
212
213 if( (cst & S_RX_COMPLETE)==0 ) {
214 /* acknowledge everything */
215 outw(ACK_INTR| (cst & S_5_INTS), nic->ioaddr + EP_COMMAND);
216 outw(C_INTR_LATCH, nic->ioaddr + EP_COMMAND);
217
218 return 0;
219 }
220
221 status = inw(nic->ioaddr + EP_W1_RX_STATUS);
222 #ifdef EDEBUG
223 printf("*%hX*",status);
224 #endif
225
226 if (status & ERR_RX) {
227 outw(RX_DISCARD_TOP_PACK, nic->ioaddr + EP_COMMAND);
228 return 0;
229 }
230
231 rx_fifo = status & RX_BYTES_MASK;
232 if (rx_fifo==0)
233 return 0;
234
235 if ( ! retrieve ) return 1;
236
237 /* read packet */
238 #ifdef EDEBUG
239 printf("[l=%d",rx_fifo);
240 #endif
241 insw(nic->ioaddr + EP_W1_RX_PIO_RD_1, nic->packet, rx_fifo / 2);
242 if(rx_fifo & 1)
243 nic->packet[rx_fifo-1]=inb(nic->ioaddr + EP_W1_RX_PIO_RD_1);
244 nic->packetlen=rx_fifo;
245
246 while(1) {
247 status = inw(nic->ioaddr + EP_W1_RX_STATUS);
248 #ifdef EDEBUG
249 printf("*%hX*",status);
250 #endif
251 rx_fifo = status & RX_BYTES_MASK;
252 if(rx_fifo>0) {
253 insw(nic->ioaddr + EP_W1_RX_PIO_RD_1, nic->packet+nic->packetlen, rx_fifo / 2);
254 if(rx_fifo & 1)
255 nic->packet[nic->packetlen+rx_fifo-1]=inb(nic->ioaddr + EP_W1_RX_PIO_RD_1);
256 nic->packetlen+=rx_fifo;
257 #ifdef EDEBUG
258 printf("+%d",rx_fifo);
259 #endif
260 }
261 if(( status & RX_INCOMPLETE )==0) {
262 #ifdef EDEBUG
263 printf("=%d",nic->packetlen);
264 #endif
265 break;
266 }
267 udelay(1000); /* if incomplete wait 1 ms */
268 }
269 /* acknowledge reception of packet */
270 outw(RX_DISCARD_TOP_PACK, nic->ioaddr + EP_COMMAND);
271 while (inw(nic->ioaddr + EP_STATUS) & S_COMMAND_IN_PROGRESS)
272 ;
273 #ifdef EDEBUG
274 {
275 unsigned short type = 0; /* used by EDEBUG */
276 type = (nic->packet[12]<<8) | nic->packet[13];
277 if(nic->packet[0]+nic->packet[1]+nic->packet[2]+nic->packet[3]+nic->packet[4]+
278 nic->packet[5] == 0xFF*ETH_ALEN)
279 printf(",t=%hX,b]",type);
280 else
281 printf(",t=%hX]",type);
282 }
283 #endif
284 return (1);
285 }
286
287 /**************************************************************************
288 ETH_IRQ - interrupt handling
289 ***************************************************************************/
t509_irq(struct nic * nic __unused,irq_action_t action __unused)290 static void t509_irq(struct nic *nic __unused, irq_action_t action __unused)
291 {
292 switch ( action ) {
293 case DISABLE :
294 break;
295 case ENABLE :
296 break;
297 case FORCE :
298 break;
299 }
300 }
301
302 /*************************************************************************
303 3Com 509 - specific routines
304 **************************************************************************/
305
eeprom_rdy(uint16_t ioaddr)306 static int eeprom_rdy ( uint16_t ioaddr ) {
307 int i;
308
309 for (i = 0; is_eeprom_busy(ioaddr) && i < MAX_EEPROMBUSY; i++);
310 if (i >= MAX_EEPROMBUSY) {
311 /* printf("3c509: eeprom failed to come ready.\n"); */
312 /* memory in EPROM is tight */
313 /* printf("3c509: eeprom busy.\n"); */
314 return (0);
315 }
316 return (1);
317 }
318
319 /*
320 * get_e: gets a 16 bits word from the EEPROM.
321 */
get_e(uint16_t ioaddr,int offset)322 static int get_e ( uint16_t ioaddr, int offset ) {
323 GO_WINDOW(ioaddr,0);
324 if (!eeprom_rdy(ioaddr))
325 return (0xffff);
326 outw(EEPROM_CMD_RD | offset, ioaddr + EP_W0_EEPROM_COMMAND);
327 if (!eeprom_rdy(ioaddr))
328 return (0xffff);
329 return (inw(ioaddr + EP_W0_EEPROM_DATA));
330 }
331
332 static struct nic_operations t509_operations = {
333 .connect = dummy_connect,
334 .poll = t509_poll,
335 .transmit = t509_transmit,
336 .irq = t509_irq,
337 };
338
339 /**************************************************************************
340 ETH_PROBE - Look for an adapter
341 ***************************************************************************/
t5x9_probe(struct nic * nic,uint16_t prod_id_check,uint16_t prod_id_mask)342 int t5x9_probe ( struct nic *nic,
343 uint16_t prod_id_check, uint16_t prod_id_mask ) {
344 uint16_t prod_id;
345 int i,j;
346 unsigned short *p;
347
348 /* Check product ID */
349 prod_id = get_e ( nic->ioaddr, EEPROM_PROD_ID );
350 if ( ( prod_id & prod_id_mask ) != prod_id_check ) {
351 printf ( "EEPROM Product ID is incorrect (%hx & %hx != %hx)\n",
352 prod_id, prod_id_mask, prod_id_check );
353 return 0;
354 }
355
356 /* test for presence of connectors */
357 GO_WINDOW(nic->ioaddr,0);
358 i = inw(nic->ioaddr + EP_W0_CONFIG_CTRL);
359 j = (inw(nic->ioaddr + EP_W0_ADDRESS_CFG) >> 14) & 0x3;
360
361 switch(j) {
362 case 0:
363 if (i & IS_UTP) {
364 printf("10baseT\n");
365 connector = utp;
366 } else {
367 printf("10baseT not present\n");
368 return 0;
369 }
370 break;
371 case 1:
372 if (i & IS_AUI) {
373 printf("10base5\n");
374 } else {
375 printf("10base5 not present\n");
376 return 0;
377 }
378 break;
379 case 3:
380 if (i & IS_BNC) {
381 printf("10base2\n");
382 connector = bnc;
383 } else {
384 printf("10base2 not present\n");
385 return 0;
386 }
387 break;
388 default:
389 printf("unknown connector\n");
390 return 0;
391 }
392
393 /*
394 * Read the station address from the eeprom
395 */
396 p = (unsigned short *) nic->node_addr;
397 for (i = 0; i < ETH_ALEN / 2; i++) {
398 p[i] = htons(get_e(nic->ioaddr,i));
399 GO_WINDOW(nic->ioaddr,2);
400 outw(ntohs(p[i]), nic->ioaddr + EP_W2_ADDR_0 + (i * 2));
401 }
402
403 DBG ( "Ethernet Address: %s\n", eth_ntoa ( nic->node_addr ) );
404
405 t509_reset(nic);
406
407 nic->nic_op = &t509_operations;
408 return 1;
409
410 }
411
412 /*
413 * Local variables:
414 * c-basic-offset: 8
415 * End:
416 */
417