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Daniel Hellstromc2b7da52008-03-28 20:22:53 +01001/* Gaisler.com GRETH 10/100/1000 Ethernet MAC driver
2 *
3 * Driver use polling mode (no Interrupt)
4 *
5 * (C) Copyright 2007
6 * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
7 *
8 * See file CREDITS for list of people who contributed to this
9 * project.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 * MA 02111-1307 USA
25 */
26
Daniel Hellstrom6644c192010-10-27 09:24:13 +020027/* #define DEBUG */
28
Daniel Hellstromc2b7da52008-03-28 20:22:53 +010029#include <common.h>
30#include <command.h>
31#include <net.h>
Ben Warren89973f82008-08-31 22:22:04 -070032#include <netdev.h>
Daniel Hellstromc2b7da52008-03-28 20:22:53 +010033#include <malloc.h>
34#include <asm/processor.h>
35#include <ambapp.h>
36#include <asm/leon.h>
37
Daniel Hellstromc2b7da52008-03-28 20:22:53 +010038#include "greth.h"
39
40/* Default to 3s timeout on autonegotiation */
41#ifndef GRETH_PHY_TIMEOUT_MS
42#define GRETH_PHY_TIMEOUT_MS 3000
43#endif
44
Daniel Hellstrome780d822010-10-22 11:26:49 +020045/* Default to PHY adrress 0 not not specified */
46#ifdef CONFIG_SYS_GRLIB_GRETH_PHYADDR
47#define GRETH_PHY_ADR_DEFAULT CONFIG_SYS_GRLIB_GRETH_PHYADDR
48#else
49#define GRETH_PHY_ADR_DEFAULT 0
50#endif
51
Daniel Hellstromc2b7da52008-03-28 20:22:53 +010052/* ByPass Cache when reading regs */
53#define GRETH_REGLOAD(addr) SPARC_NOCACHE_READ(addr)
54/* Write-through cache ==> no bypassing needed on writes */
Daniel Hellstrome3ce6862010-10-27 09:39:46 +020055#define GRETH_REGSAVE(addr,data) (*(volatile unsigned int *)(addr) = (data))
Daniel Hellstromc2b7da52008-03-28 20:22:53 +010056#define GRETH_REGORIN(addr,data) GRETH_REGSAVE(addr,GRETH_REGLOAD(addr)|data)
57#define GRETH_REGANDIN(addr,data) GRETH_REGSAVE(addr,GRETH_REGLOAD(addr)&data)
58
59#define GRETH_RXBD_CNT 4
60#define GRETH_TXBD_CNT 1
61
62#define GRETH_RXBUF_SIZE 1540
63#define GRETH_BUF_ALIGN 4
64#define GRETH_RXBUF_EFF_SIZE \
65 ( (GRETH_RXBUF_SIZE&~(GRETH_BUF_ALIGN-1))+GRETH_BUF_ALIGN )
66
67typedef struct {
68 greth_regs *regs;
69 int irq;
70 struct eth_device *dev;
71
72 /* Hardware info */
73 unsigned char phyaddr;
74 int gbit_mac;
75
76 /* Current operating Mode */
77 int gb; /* GigaBit */
78 int fd; /* Full Duplex */
79 int sp; /* 10/100Mbps speed (1=100,0=10) */
80 int auto_neg; /* Auto negotiate done */
81
82 unsigned char hwaddr[6]; /* MAC Address */
83
84 /* Descriptors */
85 greth_bd *rxbd_base, *rxbd_max;
86 greth_bd *txbd_base, *txbd_max;
87
88 greth_bd *rxbd_curr;
89
90 /* rx buffers in rx descriptors */
91 void *rxbuf_base; /* (GRETH_RXBUF_SIZE+ALIGNBYTES) * GRETH_RXBD_CNT */
92
93 /* unused for gbit_mac, temp buffer for sending packets with unligned
94 * start.
95 * Pointer to packet allocated with malloc.
96 */
97 void *txbuf;
98
99 struct {
100 /* rx status */
101 unsigned int rx_packets,
102 rx_crc_errors, rx_frame_errors, rx_length_errors, rx_errors;
103
104 /* tx stats */
105 unsigned int tx_packets,
106 tx_latecol_errors,
107 tx_underrun_errors, tx_limit_errors, tx_errors;
108 } stats;
109} greth_priv;
110
111/* Read MII register 'addr' from core 'regs' */
Daniel Hellstrome780d822010-10-22 11:26:49 +0200112static int read_mii(int phyaddr, int regaddr, volatile greth_regs * regs)
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100113{
114 while (GRETH_REGLOAD(&regs->mdio) & GRETH_MII_BUSY) {
115 }
116
Daniel Hellstrome780d822010-10-22 11:26:49 +0200117 GRETH_REGSAVE(&regs->mdio, ((phyaddr & 0x1F) << 11) | ((regaddr & 0x1F) << 6) | 2);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100118
119 while (GRETH_REGLOAD(&regs->mdio) & GRETH_MII_BUSY) {
120 }
121
122 if (!(GRETH_REGLOAD(&regs->mdio) & GRETH_MII_NVALID)) {
123 return (GRETH_REGLOAD(&regs->mdio) >> 16) & 0xFFFF;
124 } else {
125 return -1;
126 }
127}
128
Daniel Hellstrome780d822010-10-22 11:26:49 +0200129static void write_mii(int phyaddr, int regaddr, int data, volatile greth_regs * regs)
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100130{
131 while (GRETH_REGLOAD(&regs->mdio) & GRETH_MII_BUSY) {
132 }
133
134 GRETH_REGSAVE(&regs->mdio,
Daniel Hellstrome780d822010-10-22 11:26:49 +0200135 ((data & 0xFFFF) << 16) | ((phyaddr & 0x1F) << 11) |
136 ((regaddr & 0x1F) << 6) | 1);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100137
138 while (GRETH_REGLOAD(&regs->mdio) & GRETH_MII_BUSY) {
139 }
140
141}
142
143/* init/start hardware and allocate descriptor buffers for rx side
144 *
145 */
146int greth_init(struct eth_device *dev, bd_t * bis)
147{
148 int i;
149
150 greth_priv *greth = dev->priv;
151 greth_regs *regs = greth->regs;
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200152
153 debug("greth_init\n");
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100154
Daniel Hellstrom533b67d2010-10-22 11:34:01 +0200155 /* Reset core */
156 GRETH_REGSAVE(&regs->control, (GRETH_RESET | (greth->gb << 8) |
157 (greth->sp << 7) | (greth->fd << 4)));
158
159 /* Wait for Reset to complete */
160 while ( GRETH_REGLOAD(&regs->control) & GRETH_RESET) ;
161
162 GRETH_REGSAVE(&regs->control,
163 ((greth->gb << 8) | (greth->sp << 7) | (greth->fd << 4)));
164
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100165 if (!greth->rxbd_base) {
166
167 /* allocate descriptors */
168 greth->rxbd_base = (greth_bd *)
169 memalign(0x1000, GRETH_RXBD_CNT * sizeof(greth_bd));
170 greth->txbd_base = (greth_bd *)
Daniel Hellstromed52d122010-10-22 11:36:39 +0200171 memalign(0x1000, GRETH_TXBD_CNT * sizeof(greth_bd));
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100172
173 /* allocate buffers to all descriptors */
174 greth->rxbuf_base =
175 malloc(GRETH_RXBUF_EFF_SIZE * GRETH_RXBD_CNT);
176 }
177
178 /* initate rx decriptors */
179 for (i = 0; i < GRETH_RXBD_CNT; i++) {
180 greth->rxbd_base[i].addr = (unsigned int)
181 greth->rxbuf_base + (GRETH_RXBUF_EFF_SIZE * i);
182 /* enable desciptor & set wrap bit if last descriptor */
183 if (i >= (GRETH_RXBD_CNT - 1)) {
184 greth->rxbd_base[i].stat = GRETH_BD_EN | GRETH_BD_WR;
185 } else {
186 greth->rxbd_base[i].stat = GRETH_BD_EN;
187 }
188 }
189
190 /* initiate indexes */
191 greth->rxbd_curr = greth->rxbd_base;
192 greth->rxbd_max = greth->rxbd_base + (GRETH_RXBD_CNT - 1);
193 greth->txbd_max = greth->txbd_base + (GRETH_TXBD_CNT - 1);
194 /*
195 * greth->txbd_base->addr = 0;
196 * greth->txbd_base->stat = GRETH_BD_WR;
197 */
198
199 /* initate tx decriptors */
200 for (i = 0; i < GRETH_TXBD_CNT; i++) {
201 greth->txbd_base[i].addr = 0;
202 /* enable desciptor & set wrap bit if last descriptor */
Daniel Hellstromed52d122010-10-22 11:36:39 +0200203 if (i >= (GRETH_TXBD_CNT - 1)) {
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100204 greth->txbd_base[i].stat = GRETH_BD_WR;
205 } else {
206 greth->txbd_base[i].stat = 0;
207 }
208 }
209
210 /**** SET HARDWARE REGS ****/
211
212 /* Set pointer to tx/rx descriptor areas */
213 GRETH_REGSAVE(&regs->rx_desc_p, (unsigned int)&greth->rxbd_base[0]);
214 GRETH_REGSAVE(&regs->tx_desc_p, (unsigned int)&greth->txbd_base[0]);
215
216 /* Enable Transmitter, GRETH will now scan descriptors for packets
217 * to transmitt */
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200218 debug("greth_init: enabling receiver\n");
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100219 GRETH_REGORIN(&regs->control, GRETH_RXEN);
220
221 return 0;
222}
223
224/* Initiate PHY to a relevant speed
225 * return:
226 * - 0 = success
227 * - 1 = timeout/fail
228 */
229int greth_init_phy(greth_priv * dev, bd_t * bis)
230{
231 greth_regs *regs = dev->regs;
232 int tmp, tmp1, tmp2, i;
233 unsigned int start, timeout;
Daniel Hellstrome780d822010-10-22 11:26:49 +0200234 int phyaddr = GRETH_PHY_ADR_DEFAULT;
235
236#ifndef CONFIG_SYS_GRLIB_GRETH_PHYADDR
237 /* If BSP doesn't provide a hardcoded PHY address the driver will
238 * try to autodetect PHY address by stopping the search on the first
239 * PHY address which has REG0 implemented.
240 */
241 for (i=0; i<32; i++) {
242 tmp = read_mii(i, 0, regs);
243 if ( (tmp != 0) && (tmp != 0xffff) ) {
244 phyaddr = i;
245 break;
246 }
247 }
248#endif
249
250 /* Save PHY Address */
251 dev->phyaddr = phyaddr;
252
253 debug("GRETH PHY ADDRESS: %d\n", phyaddr);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100254
255 /* X msecs to ticks */
256 timeout = usec2ticks(GRETH_PHY_TIMEOUT_MS * 1000);
257
258 /* Get system timer0 current value
259 * Total timeout is 5s
260 */
261 start = get_timer(0);
262
263 /* get phy control register default values */
264
Daniel Hellstrome780d822010-10-22 11:26:49 +0200265 while ((tmp = read_mii(phyaddr, 0, regs)) & 0x8000) {
266 if (get_timer(start) > timeout) {
267 debug("greth_init_phy: PHY read 1 failed\n");
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100268 return 1; /* Fail */
Daniel Hellstrome780d822010-10-22 11:26:49 +0200269 }
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100270 }
271
272 /* reset PHY and wait for completion */
Daniel Hellstrome780d822010-10-22 11:26:49 +0200273 write_mii(phyaddr, 0, 0x8000 | tmp, regs);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100274
Daniel Hellstrome780d822010-10-22 11:26:49 +0200275 while (((tmp = read_mii(phyaddr, 0, regs))) & 0x8000) {
276 if (get_timer(start) > timeout) {
277 debug("greth_init_phy: PHY read 2 failed\n");
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100278 return 1; /* Fail */
Daniel Hellstrome780d822010-10-22 11:26:49 +0200279 }
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100280 }
281
282 /* Check if PHY is autoneg capable and then determine operating
283 * mode, otherwise force it to 10 Mbit halfduplex
284 */
285 dev->gb = 0;
286 dev->fd = 0;
287 dev->sp = 0;
288 dev->auto_neg = 0;
289 if (!((tmp >> 12) & 1)) {
Daniel Hellstrome780d822010-10-22 11:26:49 +0200290 write_mii(phyaddr, 0, 0, regs);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100291 } else {
292 /* wait for auto negotiation to complete and then check operating mode */
293 dev->auto_neg = 1;
294 i = 0;
Daniel Hellstrome780d822010-10-22 11:26:49 +0200295 while (!(((tmp = read_mii(phyaddr, 1, regs)) >> 5) & 1)) {
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100296 if (get_timer(start) > timeout) {
297 printf("Auto negotiation timed out. "
298 "Selecting default config\n");
Daniel Hellstrome780d822010-10-22 11:26:49 +0200299 tmp = read_mii(phyaddr, 0, regs);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100300 dev->gb = ((tmp >> 6) & 1)
301 && !((tmp >> 13) & 1);
302 dev->sp = !((tmp >> 6) & 1)
303 && ((tmp >> 13) & 1);
304 dev->fd = (tmp >> 8) & 1;
305 goto auto_neg_done;
306 }
307 }
308 if ((tmp >> 8) & 1) {
Daniel Hellstrome780d822010-10-22 11:26:49 +0200309 tmp1 = read_mii(phyaddr, 9, regs);
310 tmp2 = read_mii(phyaddr, 10, regs);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100311 if ((tmp1 & GRETH_MII_EXTADV_1000FD) &&
312 (tmp2 & GRETH_MII_EXTPRT_1000FD)) {
313 dev->gb = 1;
314 dev->fd = 1;
315 }
316 if ((tmp1 & GRETH_MII_EXTADV_1000HD) &&
317 (tmp2 & GRETH_MII_EXTPRT_1000HD)) {
318 dev->gb = 1;
319 dev->fd = 0;
320 }
321 }
322 if ((dev->gb == 0) || ((dev->gb == 1) && (dev->gbit_mac == 0))) {
Daniel Hellstrome780d822010-10-22 11:26:49 +0200323 tmp1 = read_mii(phyaddr, 4, regs);
324 tmp2 = read_mii(phyaddr, 5, regs);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100325 if ((tmp1 & GRETH_MII_100TXFD) &&
326 (tmp2 & GRETH_MII_100TXFD)) {
327 dev->sp = 1;
328 dev->fd = 1;
329 }
330 if ((tmp1 & GRETH_MII_100TXHD) &&
331 (tmp2 & GRETH_MII_100TXHD)) {
332 dev->sp = 1;
333 dev->fd = 0;
334 }
335 if ((tmp1 & GRETH_MII_10FD) && (tmp2 & GRETH_MII_10FD)) {
336 dev->fd = 1;
337 }
338 if ((dev->gb == 1) && (dev->gbit_mac == 0)) {
339 dev->gb = 0;
340 dev->fd = 0;
Daniel Hellstrome780d822010-10-22 11:26:49 +0200341 write_mii(phyaddr, 0, dev->sp << 13, regs);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100342 }
343 }
344
345 }
346 auto_neg_done:
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200347 debug("%s GRETH Ethermac at [0x%x] irq %d. Running \
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100348 %d Mbps %s duplex\n", dev->gbit_mac ? "10/100/1000" : "10/100", (unsigned int)(regs), (unsigned int)(dev->irq), dev->gb ? 1000 : (dev->sp ? 100 : 10), dev->fd ? "full" : "half");
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100349 /* Read out PHY info if extended registers are available */
350 if (tmp & 1) {
Daniel Hellstrome780d822010-10-22 11:26:49 +0200351 tmp1 = read_mii(phyaddr, 2, regs);
352 tmp2 = read_mii(phyaddr, 3, regs);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100353 tmp1 = (tmp1 << 6) | ((tmp2 >> 10) & 0x3F);
354 tmp = tmp2 & 0xF;
355
356 tmp2 = (tmp2 >> 4) & 0x3F;
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200357 debug("PHY: Vendor %x Device %x Revision %d\n", tmp1,
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100358 tmp2, tmp);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100359 } else {
360 printf("PHY info not available\n");
361 }
362
363 /* set speed and duplex bits in control register */
364 GRETH_REGORIN(&regs->control,
365 (dev->gb << 8) | (dev->sp << 7) | (dev->fd << 4));
366
367 return 0;
368}
369
370void greth_halt(struct eth_device *dev)
371{
372 greth_priv *greth;
373 greth_regs *regs;
374 int i;
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200375
376 debug("greth_halt\n");
377
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100378 if (!dev || !dev->priv)
379 return;
380
381 greth = dev->priv;
382 regs = greth->regs;
383
384 if (!regs)
385 return;
386
387 /* disable receiver/transmitter by clearing the enable bits */
388 GRETH_REGANDIN(&regs->control, ~(GRETH_RXEN | GRETH_TXEN));
389
390 /* reset rx/tx descriptors */
391 if (greth->rxbd_base) {
392 for (i = 0; i < GRETH_RXBD_CNT; i++) {
393 greth->rxbd_base[i].stat =
394 (i >= (GRETH_RXBD_CNT - 1)) ? GRETH_BD_WR : 0;
395 }
396 }
397
398 if (greth->txbd_base) {
399 for (i = 0; i < GRETH_TXBD_CNT; i++) {
400 greth->txbd_base[i].stat =
401 (i >= (GRETH_TXBD_CNT - 1)) ? GRETH_BD_WR : 0;
402 }
403 }
404}
405
406int greth_send(struct eth_device *dev, volatile void *eth_data, int data_length)
407{
408 greth_priv *greth = dev->priv;
409 greth_regs *regs = greth->regs;
410 greth_bd *txbd;
411 void *txbuf;
412 unsigned int status;
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200413
414 debug("greth_send\n");
415
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100416 /* send data, wait for data to be sent, then return */
417 if (((unsigned int)eth_data & (GRETH_BUF_ALIGN - 1))
418 && !greth->gbit_mac) {
419 /* data not aligned as needed by GRETH 10/100, solve this by allocating 4 byte aligned buffer
420 * and copy data to before giving it to GRETH.
421 */
422 if (!greth->txbuf) {
423 greth->txbuf = malloc(GRETH_RXBUF_SIZE);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100424 }
425
426 txbuf = greth->txbuf;
427
428 /* copy data info buffer */
429 memcpy((char *)txbuf, (char *)eth_data, data_length);
430
431 /* keep buffer to next time */
432 } else {
433 txbuf = (void *)eth_data;
434 }
435 /* get descriptor to use, only 1 supported... hehe easy */
436 txbd = greth->txbd_base;
437
438 /* setup descriptor to wrap around to it self */
439 txbd->addr = (unsigned int)txbuf;
440 txbd->stat = GRETH_BD_EN | GRETH_BD_WR | data_length;
441
442 /* Remind Core which descriptor to use when sending */
443 GRETH_REGSAVE(&regs->tx_desc_p, (unsigned int)txbd);
444
445 /* initate send by enabling transmitter */
446 GRETH_REGORIN(&regs->control, GRETH_TXEN);
447
448 /* Wait for data to be sent */
449 while ((status = GRETH_REGLOAD(&txbd->stat)) & GRETH_BD_EN) {
450 ;
451 }
452
453 /* was the packet transmitted succesfully? */
454 if (status & GRETH_TXBD_ERR_AL) {
455 greth->stats.tx_limit_errors++;
456 }
457
458 if (status & GRETH_TXBD_ERR_UE) {
459 greth->stats.tx_underrun_errors++;
460 }
461
462 if (status & GRETH_TXBD_ERR_LC) {
463 greth->stats.tx_latecol_errors++;
464 }
465
466 if (status &
467 (GRETH_TXBD_ERR_LC | GRETH_TXBD_ERR_UE | GRETH_TXBD_ERR_AL)) {
468 /* any error */
469 greth->stats.tx_errors++;
470 return -1;
471 }
472
473 /* bump tx packet counter */
474 greth->stats.tx_packets++;
475
476 /* return succefully */
477 return 0;
478}
479
480int greth_recv(struct eth_device *dev)
481{
482 greth_priv *greth = dev->priv;
483 greth_regs *regs = greth->regs;
484 greth_bd *rxbd;
485 unsigned int status, len = 0, bad;
486 unsigned char *d;
487 int enable = 0;
488 int i;
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200489
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100490 /* Receive One packet only, but clear as many error packets as there are
491 * available.
492 */
493 {
494 /* current receive descriptor */
495 rxbd = greth->rxbd_curr;
496
497 /* get status of next received packet */
498 status = GRETH_REGLOAD(&rxbd->stat);
499
500 bad = 0;
501
502 /* stop if no more packets received */
503 if (status & GRETH_BD_EN) {
504 goto done;
505 }
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200506
507 debug("greth_recv: packet 0x%lx, 0x%lx, len: %d\n",
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100508 (unsigned int)rxbd, status, status & GRETH_BD_LEN);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100509
510 /* Check status for errors.
511 */
512 if (status & GRETH_RXBD_ERR_FT) {
513 greth->stats.rx_length_errors++;
514 bad = 1;
515 }
516 if (status & (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE)) {
517 greth->stats.rx_frame_errors++;
518 bad = 1;
519 }
520 if (status & GRETH_RXBD_ERR_CRC) {
521 greth->stats.rx_crc_errors++;
522 bad = 1;
523 }
524 if (bad) {
525 greth->stats.rx_errors++;
526 printf
527 ("greth_recv: Bad packet (%d, %d, %d, 0x%08x, %d)\n",
528 greth->stats.rx_length_errors,
529 greth->stats.rx_frame_errors,
530 greth->stats.rx_crc_errors, status,
531 greth->stats.rx_packets);
532 /* print all rx descriptors */
533 for (i = 0; i < GRETH_RXBD_CNT; i++) {
534 printf("[%d]: Stat=0x%lx, Addr=0x%lx\n", i,
535 GRETH_REGLOAD(&greth->rxbd_base[i].stat),
Daniel Hellstrome780d822010-10-22 11:26:49 +0200536 GRETH_REGLOAD(&greth->rxbd_base[i].addr));
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100537 }
538 } else {
539 /* Process the incoming packet. */
540 len = status & GRETH_BD_LEN;
541 d = (char *)rxbd->addr;
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200542
543 debug
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100544 ("greth_recv: new packet, length: %d. data: %x %x %x %x %x %x %x %x\n",
545 len, d[0], d[1], d[2], d[3], d[4], d[5], d[6],
546 d[7]);
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200547
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100548 /* flush all data cache to make sure we're not reading old packet data */
549 sparc_dcache_flush_all();
550
551 /* pass packet on to network subsystem */
552 NetReceive((void *)d, len);
553
554 /* bump stats counters */
555 greth->stats.rx_packets++;
556
557 /* bad is now 0 ==> will stop loop */
558 }
559
560 /* reenable descriptor to receive more packet with this descriptor, wrap around if needed */
561 rxbd->stat =
562 GRETH_BD_EN |
563 (((unsigned int)greth->rxbd_curr >=
564 (unsigned int)greth->rxbd_max) ? GRETH_BD_WR : 0);
565 enable = 1;
566
567 /* increase index */
568 greth->rxbd_curr =
569 ((unsigned int)greth->rxbd_curr >=
570 (unsigned int)greth->rxbd_max) ? greth->
571 rxbd_base : (greth->rxbd_curr + 1);
572
Daniel Hellstrome780d822010-10-22 11:26:49 +0200573 }
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100574
575 if (enable) {
576 GRETH_REGORIN(&regs->control, GRETH_RXEN);
577 }
578 done:
579 /* return positive length of packet or 0 if non recieved */
580 return len;
581}
582
583void greth_set_hwaddr(greth_priv * greth, unsigned char *mac)
584{
585 /* save new MAC address */
586 greth->dev->enetaddr[0] = greth->hwaddr[0] = mac[0];
587 greth->dev->enetaddr[1] = greth->hwaddr[1] = mac[1];
588 greth->dev->enetaddr[2] = greth->hwaddr[2] = mac[2];
589 greth->dev->enetaddr[3] = greth->hwaddr[3] = mac[3];
590 greth->dev->enetaddr[4] = greth->hwaddr[4] = mac[4];
591 greth->dev->enetaddr[5] = greth->hwaddr[5] = mac[5];
592 greth->regs->esa_msb = (mac[0] << 8) | mac[1];
593 greth->regs->esa_lsb =
594 (mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5];
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200595
596 debug("GRETH: New MAC address: %02x:%02x:%02x:%02x:%02x:%02x\n",
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100597 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100598}
599
600int greth_initialize(bd_t * bis)
601{
602 greth_priv *greth;
603 ambapp_apbdev apbdev;
604 struct eth_device *dev;
605 int i;
606 char *addr_str, *end;
607 unsigned char addr[6];
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200608
609 debug("Scanning for GRETH\n");
610
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100611 /* Find Device & IRQ via AMBA Plug&Play information */
612 if (ambapp_apb_first(VENDOR_GAISLER, GAISLER_ETHMAC, &apbdev) != 1) {
613 return -1; /* GRETH not found */
614 }
615
616 greth = (greth_priv *) malloc(sizeof(greth_priv));
617 dev = (struct eth_device *)malloc(sizeof(struct eth_device));
618 memset(dev, 0, sizeof(struct eth_device));
619 memset(greth, 0, sizeof(greth_priv));
620
621 greth->regs = (greth_regs *) apbdev.address;
622 greth->irq = apbdev.irq;
Daniel Hellstrom6644c192010-10-27 09:24:13 +0200623 debug("Found GRETH at 0x%lx, irq %d\n", greth->regs, greth->irq);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100624 dev->priv = (void *)greth;
625 dev->iobase = (unsigned int)greth->regs;
626 dev->init = greth_init;
627 dev->halt = greth_halt;
628 dev->send = greth_send;
629 dev->recv = greth_recv;
630 greth->dev = dev;
631
632 /* Reset Core */
633 GRETH_REGSAVE(&greth->regs->control, GRETH_RESET);
634
635 /* Wait for core to finish reset cycle */
636 while (GRETH_REGLOAD(&greth->regs->control) & GRETH_RESET) ;
637
638 /* Get the phy address which assumed to have been set
639 correctly with the reset value in hardware */
640 greth->phyaddr = (GRETH_REGLOAD(&greth->regs->mdio) >> 11) & 0x1F;
641
642 /* Check if mac is gigabit capable */
643 greth->gbit_mac = (GRETH_REGLOAD(&greth->regs->control) >> 27) & 1;
644
645 /* Make descriptor string */
646 if (greth->gbit_mac) {
647 sprintf(dev->name, "GRETH 10/100/GB");
648 } else {
649 sprintf(dev->name, "GRETH 10/100");
650 }
651
652 /* initiate PHY, select speed/duplex depending on connected PHY */
653 if (greth_init_phy(greth, bis)) {
654 /* Failed to init PHY (timedout) */
Daniel Hellstrome780d822010-10-22 11:26:49 +0200655 debug("GRETH[0x%08x]: Failed to init PHY\n", greth->regs);
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100656 return -1;
657 }
658
659 /* Register Device to EtherNet subsystem */
660 eth_register(dev);
661
662 /* Get MAC address */
663 if ((addr_str = getenv("ethaddr")) != NULL) {
664 for (i = 0; i < 6; i++) {
665 addr[i] =
666 addr_str ? simple_strtoul(addr_str, &end, 16) : 0;
667 if (addr_str) {
668 addr_str = (*end) ? end + 1 : end;
669 }
670 }
671 } else {
672 /* HW Address not found in environment, Set default HW address */
673 addr[0] = GRETH_HWADDR_0; /* MSB */
674 addr[1] = GRETH_HWADDR_1;
675 addr[2] = GRETH_HWADDR_2;
676 addr[3] = GRETH_HWADDR_3;
677 addr[4] = GRETH_HWADDR_4;
678 addr[5] = GRETH_HWADDR_5; /* LSB */
679 }
680
681 /* set and remember MAC address */
682 greth_set_hwaddr(greth, addr);
683
Daniel Hellstrome780d822010-10-22 11:26:49 +0200684 debug("GRETH[0x%08x]: Initialized successfully\n", greth->regs);
Ben Warrenfc363ce2008-07-09 01:04:19 -0700685 return 0;
Daniel Hellstromc2b7da52008-03-28 20:22:53 +0100686}