2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License as
4 * published by the Free Software Foundation; either version 2 of
5 * the License, or (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 #include <asm/arch/hardware.h>
22 #include <asm/arch/spi.h>
25 * Control Registers in Bank 0
28 #define CTL_REG_ERDPTL 0x00
29 #define CTL_REG_ERDPTH 0x01
30 #define CTL_REG_EWRPTL 0x02
31 #define CTL_REG_EWRPTH 0x03
32 #define CTL_REG_ETXSTL 0x04
33 #define CTL_REG_ETXSTH 0x05
34 #define CTL_REG_ETXNDL 0x06
35 #define CTL_REG_ETXNDH 0x07
36 #define CTL_REG_ERXSTL 0x08
37 #define CTL_REG_ERXSTH 0x09
38 #define CTL_REG_ERXNDL 0x0A
39 #define CTL_REG_ERXNDH 0x0B
40 #define CTL_REG_ERXRDPTL 0x0C
41 #define CTL_REG_ERXRDPTH 0x0D
42 #define CTL_REG_ERXWRPTL 0x0E
43 #define CTL_REG_ERXWRPTH 0x0F
44 #define CTL_REG_EDMASTL 0x10
45 #define CTL_REG_EDMASTH 0x11
46 #define CTL_REG_EDMANDL 0x12
47 #define CTL_REG_EDMANDH 0x13
48 #define CTL_REG_EDMADSTL 0x14
49 #define CTL_REG_EDMADSTH 0x15
50 #define CTL_REG_EDMACSL 0x16
51 #define CTL_REG_EDMACSH 0x17
52 /* these are common in all banks */
53 #define CTL_REG_EIE 0x1B
54 #define CTL_REG_EIR 0x1C
55 #define CTL_REG_ESTAT 0x1D
56 #define CTL_REG_ECON2 0x1E
57 #define CTL_REG_ECON1 0x1F
60 * Control Registers in Bank 1
63 #define CTL_REG_EHT0 0x00
64 #define CTL_REG_EHT1 0x01
65 #define CTL_REG_EHT2 0x02
66 #define CTL_REG_EHT3 0x03
67 #define CTL_REG_EHT4 0x04
68 #define CTL_REG_EHT5 0x05
69 #define CTL_REG_EHT6 0x06
70 #define CTL_REG_EHT7 0x07
71 #define CTL_REG_EPMM0 0x08
72 #define CTL_REG_EPMM1 0x09
73 #define CTL_REG_EPMM2 0x0A
74 #define CTL_REG_EPMM3 0x0B
75 #define CTL_REG_EPMM4 0x0C
76 #define CTL_REG_EPMM5 0x0D
77 #define CTL_REG_EPMM6 0x0E
78 #define CTL_REG_EPMM7 0x0F
79 #define CTL_REG_EPMCSL 0x10
80 #define CTL_REG_EPMCSH 0x11
81 #define CTL_REG_EPMOL 0x14
82 #define CTL_REG_EPMOH 0x15
83 #define CTL_REG_EWOLIE 0x16
84 #define CTL_REG_EWOLIR 0x17
85 #define CTL_REG_ERXFCON 0x18
86 #define CTL_REG_EPKTCNT 0x19
89 * Control Registers in Bank 2
92 #define CTL_REG_MACON1 0x00
93 #define CTL_REG_MACON2 0x01
94 #define CTL_REG_MACON3 0x02
95 #define CTL_REG_MACON4 0x03
96 #define CTL_REG_MABBIPG 0x04
97 #define CTL_REG_MAIPGL 0x06
98 #define CTL_REG_MAIPGH 0x07
99 #define CTL_REG_MACLCON1 0x08
100 #define CTL_REG_MACLCON2 0x09
101 #define CTL_REG_MAMXFLL 0x0A
102 #define CTL_REG_MAMXFLH 0x0B
103 #define CTL_REG_MAPHSUP 0x0D
104 #define CTL_REG_MICON 0x11
105 #define CTL_REG_MICMD 0x12
106 #define CTL_REG_MIREGADR 0x14
107 #define CTL_REG_MIWRL 0x16
108 #define CTL_REG_MIWRH 0x17
109 #define CTL_REG_MIRDL 0x18
110 #define CTL_REG_MIRDH 0x19
113 * Control Registers in Bank 3
116 #define CTL_REG_MAADR1 0x00
117 #define CTL_REG_MAADR0 0x01
118 #define CTL_REG_MAADR3 0x02
119 #define CTL_REG_MAADR2 0x03
120 #define CTL_REG_MAADR5 0x04
121 #define CTL_REG_MAADR4 0x05
122 #define CTL_REG_EBSTSD 0x06
123 #define CTL_REG_EBSTCON 0x07
124 #define CTL_REG_EBSTCSL 0x08
125 #define CTL_REG_EBSTCSH 0x09
126 #define CTL_REG_MISTAT 0x0A
127 #define CTL_REG_EREVID 0x12
128 #define CTL_REG_ECOCON 0x15
129 #define CTL_REG_EFLOCON 0x17
130 #define CTL_REG_EPAUSL 0x18
131 #define CTL_REG_EPAUSH 0x19
138 #define PHY_REG_PHID1 0x02
139 #define PHY_REG_PHID2 0x03
140 /* taken from the Linux driver */
141 #define PHY_REG_PHCON1 0x00
142 #define PHY_REG_PHCON2 0x10
143 #define PHY_REG_PHLCON 0x14
146 * Receive Filter Register (ERXFCON) bits
149 #define ENC_RFR_UCEN 0x80
150 #define ENC_RFR_ANDOR 0x40
151 #define ENC_RFR_CRCEN 0x20
152 #define ENC_RFR_PMEN 0x10
153 #define ENC_RFR_MPEN 0x08
154 #define ENC_RFR_HTEN 0x04
155 #define ENC_RFR_MCEN 0x02
156 #define ENC_RFR_BCEN 0x01
159 * ECON1 Register Bits
162 #define ENC_ECON1_TXRST 0x80
163 #define ENC_ECON1_RXRST 0x40
164 #define ENC_ECON1_DMAST 0x20
165 #define ENC_ECON1_CSUMEN 0x10
166 #define ENC_ECON1_TXRTS 0x08
167 #define ENC_ECON1_RXEN 0x04
168 #define ENC_ECON1_BSEL1 0x02
169 #define ENC_ECON1_BSEL0 0x01
172 * ECON2 Register Bits
174 #define ENC_ECON2_AUTOINC 0x80
175 #define ENC_ECON2_PKTDEC 0x40
176 #define ENC_ECON2_PWRSV 0x20
177 #define ENC_ECON2_VRPS 0x08
182 #define ENC_EIR_PKTIF 0x40
183 #define ENC_EIR_DMAIF 0x20
184 #define ENC_EIR_LINKIF 0x10
185 #define ENC_EIR_TXIF 0x08
186 #define ENC_EIR_WOLIF 0x04
187 #define ENC_EIR_TXERIF 0x02
188 #define ENC_EIR_RXERIF 0x01
191 * ESTAT Register Bits
194 #define ENC_ESTAT_INT 0x80
195 #define ENC_ESTAT_LATECOL 0x10
196 #define ENC_ESTAT_RXBUSY 0x04
197 #define ENC_ESTAT_TXABRT 0x02
198 #define ENC_ESTAT_CLKRDY 0x01
204 #define ENC_EIE_INTIE 0x80
205 #define ENC_EIE_PKTIE 0x40
206 #define ENC_EIE_DMAIE 0x20
207 #define ENC_EIE_LINKIE 0x10
208 #define ENC_EIE_TXIE 0x08
209 #define ENC_EIE_WOLIE 0x04
210 #define ENC_EIE_TXERIE 0x02
211 #define ENC_EIE_RXERIE 0x01
214 * MACON1 Register Bits
216 #define ENC_MACON1_LOOPBK 0x10
217 #define ENC_MACON1_TXPAUS 0x08
218 #define ENC_MACON1_RXPAUS 0x04
219 #define ENC_MACON1_PASSALL 0x02
220 #define ENC_MACON1_MARXEN 0x01
224 * MACON2 Register Bits
226 #define ENC_MACON2_MARST 0x80
227 #define ENC_MACON2_RNDRST 0x40
228 #define ENC_MACON2_MARXRST 0x08
229 #define ENC_MACON2_RFUNRST 0x04
230 #define ENC_MACON2_MATXRST 0x02
231 #define ENC_MACON2_TFUNRST 0x01
234 * MACON3 Register Bits
236 #define ENC_MACON3_PADCFG2 0x80
237 #define ENC_MACON3_PADCFG1 0x40
238 #define ENC_MACON3_PADCFG0 0x20
239 #define ENC_MACON3_TXCRCEN 0x10
240 #define ENC_MACON3_PHDRLEN 0x08
241 #define ENC_MACON3_HFRMEN 0x04
242 #define ENC_MACON3_FRMLNEN 0x02
243 #define ENC_MACON3_FULDPX 0x01
246 * MICMD Register Bits
248 #define ENC_MICMD_MIISCAN 0x02
249 #define ENC_MICMD_MIIRD 0x01
252 * MISTAT Register Bits
254 #define ENC_MISTAT_NVALID 0x04
255 #define ENC_MISTAT_SCAN 0x02
256 #define ENC_MISTAT_BUSY 0x01
259 * PHID1 and PHID2 values
261 #define ENC_PHID1_VALUE 0x0083
262 #define ENC_PHID2_VALUE 0x1400
263 #define ENC_PHID2_MASK 0xFC00
266 #define ENC_SPI_SLAVE_CS 0x00010000 /* pin P1.16 */
267 #define ENC_RESET 0x00020000 /* pin P1.17 */
269 #define FAILSAFE_VALUE 5000
272 * Controller memory layout:
274 * 0x0000 - 0x17ff 6k bytes receive buffer
275 * 0x1800 - 0x1fff 2k bytes transmit buffer
277 /* Use the lower memory for receiver buffer. See errata pt. 5 */
278 #define ENC_RX_BUF_START 0x0000
279 #define ENC_TX_BUF_START 0x1800
280 /* taken from the Linux driver */
281 #define ENC_RX_BUF_END 0x17ff
282 #define ENC_TX_BUF_END 0x1fff
284 /* maximum frame length */
285 #define ENC_MAX_FRM_LEN 1518
287 #define enc_enable() PUT32(IO1CLR, ENC_SPI_SLAVE_CS)
288 #define enc_disable() PUT32(IO1SET, ENC_SPI_SLAVE_CS)
289 #define enc_cfg_spi() spi_set_cfg(0, 0, 0); spi_set_clock(8);
292 static unsigned char encReadReg (unsigned char regNo);
293 static void encWriteReg (unsigned char regNo, unsigned char data);
294 static void encWriteRegRetry (unsigned char regNo, unsigned char data, int c);
295 static void encReadBuff (unsigned short length, unsigned char *pBuff);
296 static void encWriteBuff (unsigned short length, unsigned char *pBuff);
297 static void encBitSet (unsigned char regNo, unsigned char data);
298 static void encBitClr (unsigned char regNo, unsigned char data);
299 static void encReset (void);
300 static void encInit (unsigned char *pEthAddr);
301 static unsigned short phyRead (unsigned char addr);
302 static void phyWrite(unsigned char, unsigned short);
303 static void encPoll (void);
304 static void encRx (void);
306 #define m_nic_read(reg) encReadReg(reg)
307 #define m_nic_write(reg, data) encWriteReg(reg, data)
308 #define m_nic_write_retry(reg, data, count) encWriteRegRetry(reg, data, count)
309 #define m_nic_read_data(len, buf) encReadBuff((len), (buf))
310 #define m_nic_write_data(len, buf) encWriteBuff((len), (buf))
313 #define m_nic_bfs(reg, data) encBitSet(reg, data)
315 /* bit field clear */
316 #define m_nic_bfc(reg, data) encBitClr(reg, data)
318 static unsigned char bank = 0; /* current bank in enc28j60 */
319 static unsigned char next_pointer_lsb;
320 static unsigned char next_pointer_msb;
322 static unsigned char buffer[ENC_MAX_FRM_LEN];
323 static int rxResetCounter = 0;
325 #define RX_RESET_COUNTER 1000;
327 /*-----------------------------------------------------------------------------
330 int eth_init (bd_t * bis)
332 unsigned char estatVal;
335 (*((volatile unsigned long *) IO1DIR)) |= ENC_SPI_SLAVE_CS;
336 (*((volatile unsigned long *) IO1DIR)) |= ENC_RESET;
338 /* CS and RESET active low */
339 PUT32 (IO1SET, ENC_SPI_SLAVE_CS);
340 PUT32 (IO1SET, ENC_RESET);
344 /* taken from the Linux driver - dangerous stuff here! */
345 /* Wait for CLKRDY to become set (i.e., check that we can communicate with
349 estatVal = m_nic_read(CTL_REG_ESTAT);
350 } while ((estatVal & 0x08) || (~estatVal & ENC_ESTAT_CLKRDY));
352 /* initialize controller */
354 encInit (bis->bi_enetaddr);
356 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_RXEN); /* enable receive */
361 int eth_send (volatile void *packet, int length)
363 /* check frame length, etc. */
366 /* switch to bank 0 */
367 m_nic_bfc (CTL_REG_ECON1, (ENC_ECON1_BSEL1 | ENC_ECON1_BSEL0));
370 m_nic_write (CTL_REG_EWRPTL, (ENC_TX_BUF_START & 0xff));
371 m_nic_write (CTL_REG_EWRPTH, (ENC_TX_BUF_START >> 8));
374 m_nic_write (CTL_REG_ETXNDL, (length + ENC_TX_BUF_START) & 0xFF);
375 m_nic_write (CTL_REG_ETXNDH, (length + ENC_TX_BUF_START) >> 8);
378 m_nic_write (CTL_REG_ETXSTL, ENC_TX_BUF_START & 0xFF);
379 m_nic_write (CTL_REG_ETXSTH, ENC_TX_BUF_START >> 8);
382 m_nic_write_data (length, (unsigned char *) packet);
384 /* taken from the Linux driver */
385 /* Verify that the internal transmit logic has not been altered by excessive
386 collisions. See Errata B4 12 and 14.
388 if (m_nic_read(CTL_REG_EIR) & ENC_EIR_TXERIF) {
389 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_TXRST);
390 m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_TXRST);
392 m_nic_bfc(CTL_REG_EIR, (ENC_EIR_TXERIF | ENC_EIR_TXIF));
394 /* set ECON1.TXRTS */
395 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_TXRTS);
401 /*****************************************************************************
402 * This function resets the receiver only. This function may be called from
405 static void encReceiverReset (void)
409 econ1 = m_nic_read (CTL_REG_ECON1);
410 if ((econ1 & ENC_ECON1_RXRST) == 0) {
411 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_RXRST);
412 rxResetCounter = RX_RESET_COUNTER;
416 /*****************************************************************************
417 * receiver reset timer
419 static void encReceiverResetCallback (void)
421 m_nic_bfc (CTL_REG_ECON1, ENC_ECON1_RXRST);
422 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_RXEN); /* enable receive */
425 /*-----------------------------------------------------------------------------
426 * Check for received packets. Call NetReceive for each packet. The return
427 * value is ignored by the caller.
431 if (rxResetCounter > 0 && --rxResetCounter == 0) {
432 encReceiverResetCallback ();
442 m_nic_bfc (CTL_REG_ECON1, ENC_ECON1_RXEN); /* disable receive */
445 /*****************************************************************************/
447 static void encPoll (void)
449 unsigned char eir_reg;
450 volatile unsigned char estat_reg;
451 unsigned char pkt_cnt;
453 #ifdef CONFIG_USE_IRQ
454 /* clear global interrupt enable bit in enc28j60 */
455 m_nic_bfc (CTL_REG_EIE, ENC_EIE_INTIE);
457 estat_reg = m_nic_read (CTL_REG_ESTAT);
459 eir_reg = m_nic_read (CTL_REG_EIR);
461 if (eir_reg & ENC_EIR_TXIF) {
462 /* clear TXIF bit in EIR */
463 m_nic_bfc (CTL_REG_EIR, ENC_EIR_TXIF);
466 /* We have to use pktcnt and not pktif bit, see errata pt. 6 */
469 m_nic_bfc (CTL_REG_ECON1, ENC_ECON1_BSEL1);
470 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_BSEL0);
473 pkt_cnt = m_nic_read (CTL_REG_EPKTCNT);
476 if ((eir_reg & ENC_EIR_PKTIF) == 0) {
477 /*printf("encPoll: pkt cnt > 0, but pktif not set\n"); */
480 /* clear PKTIF bit in EIR, this should not need to be done but it
481 seems like we get problems if we do not */
482 m_nic_bfc (CTL_REG_EIR, ENC_EIR_PKTIF);
485 if (eir_reg & ENC_EIR_RXERIF) {
486 printf ("encPoll: rx error\n");
487 m_nic_bfc (CTL_REG_EIR, ENC_EIR_RXERIF);
489 if (eir_reg & ENC_EIR_TXERIF) {
490 printf ("encPoll: tx error\n");
491 m_nic_bfc (CTL_REG_EIR, ENC_EIR_TXERIF);
494 #ifdef CONFIG_USE_IRQ
495 /* set global interrupt enable bit in enc28j60 */
496 m_nic_bfs (CTL_REG_EIE, ENC_EIE_INTIE);
500 static void encRx (void)
502 unsigned short pkt_len;
503 unsigned short copy_len;
504 unsigned short status;
505 unsigned char eir_reg;
506 unsigned char pkt_cnt = 0;
507 unsigned short rxbuf_rdpt;
509 /* switch to bank 0 */
510 m_nic_bfc (CTL_REG_ECON1, (ENC_ECON1_BSEL1 | ENC_ECON1_BSEL0));
512 m_nic_write (CTL_REG_ERDPTL, next_pointer_lsb);
513 m_nic_write (CTL_REG_ERDPTH, next_pointer_msb);
516 m_nic_read_data (6, buffer);
517 next_pointer_lsb = buffer[0];
518 next_pointer_msb = buffer[1];
520 pkt_len |= (unsigned short) buffer[3] << 8;
522 status |= (unsigned short) buffer[5] << 8;
524 if (pkt_len <= ENC_MAX_FRM_LEN)
529 if ((status & (1L << 7)) == 0) /* check Received Ok bit */
532 /* taken from the Linux driver */
533 /* check if next pointer is resonable */
534 if ((((unsigned int)next_pointer_msb << 8) |
535 (unsigned int)next_pointer_lsb) >= ENC_TX_BUF_START)
539 m_nic_read_data (copy_len, buffer);
542 /* advance read pointer to next pointer */
543 m_nic_write (CTL_REG_ERDPTL, next_pointer_lsb);
544 m_nic_write (CTL_REG_ERDPTH, next_pointer_msb);
546 /* decrease packet counter */
547 m_nic_bfs (CTL_REG_ECON2, ENC_ECON2_PKTDEC);
549 /* taken from the Linux driver */
550 /* Only odd values should be written to ERXRDPTL,
551 * see errata B4 pt.13
553 rxbuf_rdpt = (next_pointer_msb << 8 | next_pointer_lsb) - 1;
554 if ((rxbuf_rdpt < (m_nic_read(CTL_REG_ERXSTH) << 8 |
555 m_nic_read(CTL_REG_ERXSTL))) || (rxbuf_rdpt >
556 (m_nic_read(CTL_REG_ERXNDH) << 8 |
557 m_nic_read(CTL_REG_ERXNDL)))) {
558 m_nic_write(CTL_REG_ERXRDPTL, m_nic_read(CTL_REG_ERXNDL));
559 m_nic_write(CTL_REG_ERXRDPTH, m_nic_read(CTL_REG_ERXNDH));
561 m_nic_write(CTL_REG_ERXRDPTL, rxbuf_rdpt & 0xFF);
562 m_nic_write(CTL_REG_ERXRDPTH, rxbuf_rdpt >> 8);
566 m_nic_bfc (CTL_REG_ECON1, ENC_ECON1_BSEL1);
567 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_BSEL0);
570 pkt_cnt = m_nic_read (CTL_REG_EPKTCNT);
572 /* switch to bank 0 */
573 m_nic_bfc (CTL_REG_ECON1,
574 (ENC_ECON1_BSEL1 | ENC_ECON1_BSEL0));
577 eir_reg = m_nic_read (CTL_REG_EIR);
579 printf ("eth_rx: copy_len=0\n");
583 NetReceive ((unsigned char *) buffer, pkt_len);
585 eir_reg = m_nic_read (CTL_REG_EIR);
586 } while (pkt_cnt); /* Use EPKTCNT not EIR.PKTIF flag, see errata pt. 6 */
589 static void encWriteReg (unsigned char regNo, unsigned char data)
595 spi_write (0x40 | regNo); /* write in regNo */
601 spi_write (0x1f); /* write reg 0x1f */
607 static void encWriteRegRetry (unsigned char regNo, unsigned char data, int c)
609 unsigned char readback;
614 for (i = 0; i < c; i++) {
618 spi_write (0x40 | regNo); /* write in regNo */
624 spi_write (0x1f); /* write reg 0x1f */
628 spi_unlock (); /* we must unlock spi first */
630 readback = encReadReg (regNo);
634 if (readback == data)
640 printf ("enc28j60: write reg %d failed\n", regNo);
644 static unsigned char encReadReg (unsigned char regNo)
646 unsigned char rxByte;
652 spi_write (0x1f); /* read reg 0x1f */
654 bank = spi_read () & 0x3;
660 rxByte = spi_read ();
662 /* check if MAC or MII register */
663 if (((bank == 2) && (regNo <= 0x1a)) ||
664 ((bank == 3) && (regNo <= 0x05 || regNo == 0x0a))) {
665 /* ignore first byte and read another byte */
666 rxByte = spi_read ();
675 static void encReadBuff (unsigned short length, unsigned char *pBuff)
681 spi_write (0x20 | 0x1a); /* read buffer memory */
685 *pBuff++ = spi_read ();
694 static void encWriteBuff (unsigned short length, unsigned char *pBuff)
700 spi_write (0x60 | 0x1a); /* write buffer memory */
702 spi_write (0x00); /* control byte */
705 spi_write (*pBuff++);
711 static void encBitSet (unsigned char regNo, unsigned char data)
717 spi_write (0x80 | regNo); /* bit field set */
724 static void encBitClr (unsigned char regNo, unsigned char data)
730 spi_write (0xA0 | regNo); /* bit field clear */
737 static void encReset (void)
743 spi_write (0xff); /* soft reset */
748 /* sleep 1 ms. See errata pt. 2 */
752 static void encInit (unsigned char *pEthAddr)
754 unsigned short phid1 = 0;
755 unsigned short phid2 = 0;
757 /* switch to bank 0 */
758 m_nic_bfc (CTL_REG_ECON1, (ENC_ECON1_BSEL1 | ENC_ECON1_BSEL0));
761 * Setup the buffer space. The reset values are valid for the
764 /* We shall not write to ERXST, see errata pt. 5. Instead we
765 have to make sure that ENC_RX_BUS_START is 0. */
766 m_nic_write_retry (CTL_REG_ERXSTL, (ENC_RX_BUF_START & 0xFF), 1);
767 m_nic_write_retry (CTL_REG_ERXSTH, (ENC_RX_BUF_START >> 8), 1);
769 /* taken from the Linux driver */
770 m_nic_write_retry (CTL_REG_ERXNDL, (ENC_RX_BUF_END & 0xFF), 1);
771 m_nic_write_retry (CTL_REG_ERXNDH, (ENC_RX_BUF_END >> 8), 1);
773 m_nic_write_retry (CTL_REG_ERDPTL, (ENC_RX_BUF_START & 0xFF), 1);
774 m_nic_write_retry (CTL_REG_ERDPTH, (ENC_RX_BUF_START >> 8), 1);
776 next_pointer_lsb = (ENC_RX_BUF_START & 0xFF);
777 next_pointer_msb = (ENC_RX_BUF_START >> 8);
779 /* verify identification */
780 phid1 = phyRead (PHY_REG_PHID1);
781 phid2 = phyRead (PHY_REG_PHID2);
783 if (phid1 != ENC_PHID1_VALUE
784 || (phid2 & ENC_PHID2_MASK) != ENC_PHID2_VALUE) {
785 printf ("ERROR: failed to identify controller\n");
786 printf ("phid1 = %x, phid2 = %x\n",
787 phid1, (phid2 & ENC_PHID2_MASK));
788 printf ("should be phid1 = %x, phid2 = %x\n",
789 ENC_PHID1_VALUE, ENC_PHID2_VALUE);
793 * --- MAC Initialization ---
796 /* Pull MAC out of Reset */
798 /* switch to bank 2 */
799 m_nic_bfc (CTL_REG_ECON1, ENC_ECON1_BSEL0);
800 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_BSEL1);
802 /* enable MAC to receive frames */
803 /* added some bits from the Linux driver */
804 m_nic_write_retry (CTL_REG_MACON1
805 ,(ENC_MACON1_MARXEN | ENC_MACON1_TXPAUS | ENC_MACON1_RXPAUS)
808 /* configure pad, tx-crc and duplex */
809 /* added a bit from the Linux driver */
810 m_nic_write_retry (CTL_REG_MACON3
811 ,(ENC_MACON3_PADCFG0 | ENC_MACON3_TXCRCEN | ENC_MACON3_FRMLNEN)
814 /* added 4 new lines from the Linux driver */
815 /* Allow infinite deferals if the medium is continously busy */
816 m_nic_write_retry(CTL_REG_MACON4, (1<<6) /*ENC_MACON4_DEFER*/, 10);
818 /* Late collisions occur beyond 63 bytes */
819 m_nic_write_retry(CTL_REG_MACLCON2, 63, 10);
821 /* Set (low byte) Non-Back-to_Back Inter-Packet Gap. Recommended 0x12 */
822 m_nic_write_retry(CTL_REG_MAIPGL, 0x12, 10);
825 * Set (high byte) Non-Back-to_Back Inter-Packet Gap. Recommended
826 * 0x0c for half-duplex. Nothing for full-duplex
828 m_nic_write_retry(CTL_REG_MAIPGH, 0x0C, 10);
830 /* set maximum frame length */
831 m_nic_write_retry (CTL_REG_MAMXFLL, (ENC_MAX_FRM_LEN & 0xff), 10);
832 m_nic_write_retry (CTL_REG_MAMXFLH, (ENC_MAX_FRM_LEN >> 8), 10);
835 * Set MAC back-to-back inter-packet gap. Recommended 0x12 for half duplex
836 * and 0x15 for full duplex.
838 m_nic_write_retry (CTL_REG_MABBIPG, 0x12, 10);
840 /* set MAC address */
842 /* switch to bank 3 */
843 m_nic_bfs (CTL_REG_ECON1, (ENC_ECON1_BSEL0 | ENC_ECON1_BSEL1));
845 m_nic_write_retry (CTL_REG_MAADR0, pEthAddr[5], 1);
846 m_nic_write_retry (CTL_REG_MAADR1, pEthAddr[4], 1);
847 m_nic_write_retry (CTL_REG_MAADR2, pEthAddr[3], 1);
848 m_nic_write_retry (CTL_REG_MAADR3, pEthAddr[2], 1);
849 m_nic_write_retry (CTL_REG_MAADR4, pEthAddr[1], 1);
850 m_nic_write_retry (CTL_REG_MAADR5, pEthAddr[0], 1);
853 * PHY Initialization taken from the Linux driver
856 /* Prevent automatic loopback of data beeing transmitted by setting
858 phyWrite(PHY_REG_PHCON2, (1<<8));
860 /* LEDs configuration
861 * LEDA: LACFG = 0100 -> display link status
862 * LEDB: LBCFG = 0111 -> display TX & RX activity
863 * STRCH = 1 -> LED pulses
865 phyWrite(PHY_REG_PHLCON, 0x0472);
867 /* Reset PDPXMD-bit => half duplex */
868 phyWrite(PHY_REG_PHCON1, 0);
874 #ifdef CONFIG_USE_IRQ
875 /* enable interrupts */
876 m_nic_bfs (CTL_REG_EIE, ENC_EIE_PKTIE);
877 m_nic_bfs (CTL_REG_EIE, ENC_EIE_TXIE);
878 m_nic_bfs (CTL_REG_EIE, ENC_EIE_RXERIE);
879 m_nic_bfs (CTL_REG_EIE, ENC_EIE_TXERIE);
880 m_nic_bfs (CTL_REG_EIE, ENC_EIE_INTIE);
884 /*****************************************************************************
887 * Read PHY registers.
889 * NOTE! This function will change to Bank 2.
892 * [in] addr address of the register to read
895 * The value in the register
897 static unsigned short phyRead (unsigned char addr)
899 unsigned short ret = 0;
902 m_nic_bfc (CTL_REG_ECON1, ENC_ECON1_BSEL0);
903 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_BSEL1);
905 /* write address to MIREGADR */
906 m_nic_write (CTL_REG_MIREGADR, addr);
908 /* set MICMD.MIIRD */
909 m_nic_write (CTL_REG_MICMD, ENC_MICMD_MIIRD);
911 /* taken from the Linux driver */
913 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL0);
914 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1);
916 /* poll MISTAT.BUSY bit until operation is complete */
917 while ((m_nic_read (CTL_REG_MISTAT) & ENC_MISTAT_BUSY) != 0) {
921 /* GJ - this seems extremely dangerous! */
927 /* taken from the Linux driver */
929 m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_BSEL0);
930 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1);
932 /* clear MICMD.MIIRD */
933 m_nic_write (CTL_REG_MICMD, 0);
935 ret = (m_nic_read (CTL_REG_MIRDH) << 8);
936 ret |= (m_nic_read (CTL_REG_MIRDL) & 0xFF);
941 /*****************************************************************************
943 * Taken from the Linux driver.
945 * Write PHY registers.
947 * NOTE! This function will change to Bank 3.
950 * [in] addr address of the register to write to
951 * [in] data to be written
956 static void phyWrite(unsigned char addr, unsigned short data)
959 m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_BSEL0);
960 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1);
962 /* write address to MIREGADR */
963 m_nic_write(CTL_REG_MIREGADR, addr);
965 m_nic_write(CTL_REG_MIWRL, data & 0xff);
966 m_nic_write(CTL_REG_MIWRH, data >> 8);
969 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL0);
970 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1);
972 /* poll MISTAT.BUSY bit until operation is complete */
973 while((m_nic_read(CTL_REG_MISTAT) & ENC_MISTAT_BUSY) != 0) {