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,
20 #ifdef CONFIG_ENC28J60
22 #include <asm/arch/hardware.h>
23 #include <asm/arch/spi.h>
26 * Control Registers in Bank 0
29 #define CTL_REG_ERDPTL 0x00
30 #define CTL_REG_ERDPTH 0x01
31 #define CTL_REG_EWRPTL 0x02
32 #define CTL_REG_EWRPTH 0x03
33 #define CTL_REG_ETXSTL 0x04
34 #define CTL_REG_ETXSTH 0x05
35 #define CTL_REG_ETXNDL 0x06
36 #define CTL_REG_ETXNDH 0x07
37 #define CTL_REG_ERXSTL 0x08
38 #define CTL_REG_ERXSTH 0x09
39 #define CTL_REG_ERXNDL 0x0A
40 #define CTL_REG_ERXNDH 0x0B
41 #define CTL_REG_ERXRDPTL 0x0C
42 #define CTL_REG_ERXRDPTH 0x0D
43 #define CTL_REG_ERXWRPTL 0x0E
44 #define CTL_REG_ERXWRPTH 0x0F
45 #define CTL_REG_EDMASTL 0x10
46 #define CTL_REG_EDMASTH 0x11
47 #define CTL_REG_EDMANDL 0x12
48 #define CTL_REG_EDMANDH 0x13
49 #define CTL_REG_EDMADSTL 0x14
50 #define CTL_REG_EDMADSTH 0x15
51 #define CTL_REG_EDMACSL 0x16
52 #define CTL_REG_EDMACSH 0x17
53 /* these are common in all banks */
54 #define CTL_REG_EIE 0x1B
55 #define CTL_REG_EIR 0x1C
56 #define CTL_REG_ESTAT 0x1D
57 #define CTL_REG_ECON2 0x1E
58 #define CTL_REG_ECON1 0x1F
61 * Control Registers in Bank 1
64 #define CTL_REG_EHT0 0x00
65 #define CTL_REG_EHT1 0x01
66 #define CTL_REG_EHT2 0x02
67 #define CTL_REG_EHT3 0x03
68 #define CTL_REG_EHT4 0x04
69 #define CTL_REG_EHT5 0x05
70 #define CTL_REG_EHT6 0x06
71 #define CTL_REG_EHT7 0x07
72 #define CTL_REG_EPMM0 0x08
73 #define CTL_REG_EPMM1 0x09
74 #define CTL_REG_EPMM2 0x0A
75 #define CTL_REG_EPMM3 0x0B
76 #define CTL_REG_EPMM4 0x0C
77 #define CTL_REG_EPMM5 0x0D
78 #define CTL_REG_EPMM6 0x0E
79 #define CTL_REG_EPMM7 0x0F
80 #define CTL_REG_EPMCSL 0x10
81 #define CTL_REG_EPMCSH 0x11
82 #define CTL_REG_EPMOL 0x14
83 #define CTL_REG_EPMOH 0x15
84 #define CTL_REG_EWOLIE 0x16
85 #define CTL_REG_EWOLIR 0x17
86 #define CTL_REG_ERXFCON 0x18
87 #define CTL_REG_EPKTCNT 0x19
90 * Control Registers in Bank 2
93 #define CTL_REG_MACON1 0x00
94 #define CTL_REG_MACON2 0x01
95 #define CTL_REG_MACON3 0x02
96 #define CTL_REG_MACON4 0x03
97 #define CTL_REG_MABBIPG 0x04
98 #define CTL_REG_MAIPGL 0x06
99 #define CTL_REG_MAIPGH 0x07
100 #define CTL_REG_MACLCON1 0x08
101 #define CTL_REG_MACLCON2 0x09
102 #define CTL_REG_MAMXFLL 0x0A
103 #define CTL_REG_MAMXFLH 0x0B
104 #define CTL_REG_MAPHSUP 0x0D
105 #define CTL_REG_MICON 0x11
106 #define CTL_REG_MICMD 0x12
107 #define CTL_REG_MIREGADR 0x14
108 #define CTL_REG_MIWRL 0x16
109 #define CTL_REG_MIWRH 0x17
110 #define CTL_REG_MIRDL 0x18
111 #define CTL_REG_MIRDH 0x19
114 * Control Registers in Bank 3
117 #define CTL_REG_MAADR1 0x00
118 #define CTL_REG_MAADR0 0x01
119 #define CTL_REG_MAADR3 0x02
120 #define CTL_REG_MAADR2 0x03
121 #define CTL_REG_MAADR5 0x04
122 #define CTL_REG_MAADR4 0x05
123 #define CTL_REG_EBSTSD 0x06
124 #define CTL_REG_EBSTCON 0x07
125 #define CTL_REG_EBSTCSL 0x08
126 #define CTL_REG_EBSTCSH 0x09
127 #define CTL_REG_MISTAT 0x0A
128 #define CTL_REG_EREVID 0x12
129 #define CTL_REG_ECOCON 0x15
130 #define CTL_REG_EFLOCON 0x17
131 #define CTL_REG_EPAUSL 0x18
132 #define CTL_REG_EPAUSH 0x19
139 #define PHY_REG_PHID1 0x02
140 #define PHY_REG_PHID2 0x03
141 /* taken from the Linux driver */
142 #define PHY_REG_PHCON1 0x00
143 #define PHY_REG_PHCON2 0x10
144 #define PHY_REG_PHLCON 0x14
147 * Receive Filter Register (ERXFCON) bits
150 #define ENC_RFR_UCEN 0x80
151 #define ENC_RFR_ANDOR 0x40
152 #define ENC_RFR_CRCEN 0x20
153 #define ENC_RFR_PMEN 0x10
154 #define ENC_RFR_MPEN 0x08
155 #define ENC_RFR_HTEN 0x04
156 #define ENC_RFR_MCEN 0x02
157 #define ENC_RFR_BCEN 0x01
160 * ECON1 Register Bits
163 #define ENC_ECON1_TXRST 0x80
164 #define ENC_ECON1_RXRST 0x40
165 #define ENC_ECON1_DMAST 0x20
166 #define ENC_ECON1_CSUMEN 0x10
167 #define ENC_ECON1_TXRTS 0x08
168 #define ENC_ECON1_RXEN 0x04
169 #define ENC_ECON1_BSEL1 0x02
170 #define ENC_ECON1_BSEL0 0x01
173 * ECON2 Register Bits
175 #define ENC_ECON2_AUTOINC 0x80
176 #define ENC_ECON2_PKTDEC 0x40
177 #define ENC_ECON2_PWRSV 0x20
178 #define ENC_ECON2_VRPS 0x08
183 #define ENC_EIR_PKTIF 0x40
184 #define ENC_EIR_DMAIF 0x20
185 #define ENC_EIR_LINKIF 0x10
186 #define ENC_EIR_TXIF 0x08
187 #define ENC_EIR_WOLIF 0x04
188 #define ENC_EIR_TXERIF 0x02
189 #define ENC_EIR_RXERIF 0x01
192 * ESTAT Register Bits
195 #define ENC_ESTAT_INT 0x80
196 #define ENC_ESTAT_LATECOL 0x10
197 #define ENC_ESTAT_RXBUSY 0x04
198 #define ENC_ESTAT_TXABRT 0x02
199 #define ENC_ESTAT_CLKRDY 0x01
205 #define ENC_EIE_INTIE 0x80
206 #define ENC_EIE_PKTIE 0x40
207 #define ENC_EIE_DMAIE 0x20
208 #define ENC_EIE_LINKIE 0x10
209 #define ENC_EIE_TXIE 0x08
210 #define ENC_EIE_WOLIE 0x04
211 #define ENC_EIE_TXERIE 0x02
212 #define ENC_EIE_RXERIE 0x01
215 * MACON1 Register Bits
217 #define ENC_MACON1_LOOPBK 0x10
218 #define ENC_MACON1_TXPAUS 0x08
219 #define ENC_MACON1_RXPAUS 0x04
220 #define ENC_MACON1_PASSALL 0x02
221 #define ENC_MACON1_MARXEN 0x01
225 * MACON2 Register Bits
227 #define ENC_MACON2_MARST 0x80
228 #define ENC_MACON2_RNDRST 0x40
229 #define ENC_MACON2_MARXRST 0x08
230 #define ENC_MACON2_RFUNRST 0x04
231 #define ENC_MACON2_MATXRST 0x02
232 #define ENC_MACON2_TFUNRST 0x01
235 * MACON3 Register Bits
237 #define ENC_MACON3_PADCFG2 0x80
238 #define ENC_MACON3_PADCFG1 0x40
239 #define ENC_MACON3_PADCFG0 0x20
240 #define ENC_MACON3_TXCRCEN 0x10
241 #define ENC_MACON3_PHDRLEN 0x08
242 #define ENC_MACON3_HFRMEN 0x04
243 #define ENC_MACON3_FRMLNEN 0x02
244 #define ENC_MACON3_FULDPX 0x01
247 * MICMD Register Bits
249 #define ENC_MICMD_MIISCAN 0x02
250 #define ENC_MICMD_MIIRD 0x01
253 * MISTAT Register Bits
255 #define ENC_MISTAT_NVALID 0x04
256 #define ENC_MISTAT_SCAN 0x02
257 #define ENC_MISTAT_BUSY 0x01
260 * PHID1 and PHID2 values
262 #define ENC_PHID1_VALUE 0x0083
263 #define ENC_PHID2_VALUE 0x1400
264 #define ENC_PHID2_MASK 0xFC00
267 #define ENC_SPI_SLAVE_CS 0x00010000 /* pin P1.16 */
268 #define ENC_RESET 0x00020000 /* pin P1.17 */
270 #define FAILSAFE_VALUE 5000
273 * Controller memory layout:
275 * 0x0000 - 0x17ff 6k bytes receive buffer
276 * 0x1800 - 0x1fff 2k bytes transmit buffer
278 /* Use the lower memory for receiver buffer. See errata pt. 5 */
279 #define ENC_RX_BUF_START 0x0000
280 #define ENC_TX_BUF_START 0x1800
281 /* taken from the Linux driver */
282 #define ENC_RX_BUF_END 0x17ff
283 #define ENC_TX_BUF_END 0x1fff
285 /* maximum frame length */
286 #define ENC_MAX_FRM_LEN 1518
288 #define enc_enable() PUT32(IO1CLR, ENC_SPI_SLAVE_CS)
289 #define enc_disable() PUT32(IO1SET, ENC_SPI_SLAVE_CS)
290 #define enc_cfg_spi() spi_set_cfg(0, 0, 0); spi_set_clock(8);
293 static unsigned char encReadReg (unsigned char regNo);
294 static void encWriteReg (unsigned char regNo, unsigned char data);
295 static void encWriteRegRetry (unsigned char regNo, unsigned char data, int c);
296 static void encReadBuff (unsigned short length, unsigned char *pBuff);
297 static void encWriteBuff (unsigned short length, unsigned char *pBuff);
298 static void encBitSet (unsigned char regNo, unsigned char data);
299 static void encBitClr (unsigned char regNo, unsigned char data);
300 static void encReset (void);
301 static void encInit (unsigned char *pEthAddr);
302 static unsigned short phyRead (unsigned char addr);
303 static void phyWrite(unsigned char, unsigned short);
304 static void encPoll (void);
305 static void encRx (void);
307 #define m_nic_read(reg) encReadReg(reg)
308 #define m_nic_write(reg, data) encWriteReg(reg, data)
309 #define m_nic_write_retry(reg, data, count) encWriteRegRetry(reg, data, count)
310 #define m_nic_read_data(len, buf) encReadBuff((len), (buf))
311 #define m_nic_write_data(len, buf) encWriteBuff((len), (buf))
314 #define m_nic_bfs(reg, data) encBitSet(reg, data)
316 /* bit field clear */
317 #define m_nic_bfc(reg, data) encBitClr(reg, data)
319 static unsigned char bank = 0; /* current bank in enc28j60 */
320 static unsigned char next_pointer_lsb;
321 static unsigned char next_pointer_msb;
323 static unsigned char buffer[ENC_MAX_FRM_LEN];
324 static int rxResetCounter = 0;
326 #define RX_RESET_COUNTER 1000;
328 /*-----------------------------------------------------------------------------
331 int eth_init (bd_t * bis)
333 unsigned char estatVal;
336 (*((volatile unsigned long *) IO1DIR)) |= ENC_SPI_SLAVE_CS;
337 (*((volatile unsigned long *) IO1DIR)) |= ENC_RESET;
339 /* CS and RESET active low */
340 PUT32 (IO1SET, ENC_SPI_SLAVE_CS);
341 PUT32 (IO1SET, ENC_RESET);
345 /* taken from the Linux driver - dangerous stuff here! */
346 /* Wait for CLKRDY to become set (i.e., check that we can communicate with
350 estatVal = m_nic_read(CTL_REG_ESTAT);
351 } while ((estatVal & 0x08) || (~estatVal & ENC_ESTAT_CLKRDY));
353 /* initialize controller */
355 encInit (bis->bi_enetaddr);
357 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_RXEN); /* enable receive */
362 int eth_send (volatile void *packet, int length)
364 /* check frame length, etc. */
367 /* switch to bank 0 */
368 m_nic_bfc (CTL_REG_ECON1, (ENC_ECON1_BSEL1 | ENC_ECON1_BSEL0));
371 m_nic_write (CTL_REG_EWRPTL, (ENC_TX_BUF_START & 0xff));
372 m_nic_write (CTL_REG_EWRPTH, (ENC_TX_BUF_START >> 8));
375 m_nic_write (CTL_REG_ETXNDL, (length + ENC_TX_BUF_START) & 0xFF);
376 m_nic_write (CTL_REG_ETXNDH, (length + ENC_TX_BUF_START) >> 8);
379 m_nic_write (CTL_REG_ETXSTL, ENC_TX_BUF_START & 0xFF);
380 m_nic_write (CTL_REG_ETXSTH, ENC_TX_BUF_START >> 8);
383 m_nic_write_data (length, (unsigned char *) packet);
385 /* taken from the Linux driver */
386 /* Verify that the internal transmit logic has not been altered by excessive
387 collisions. See Errata B4 12 and 14.
389 if (m_nic_read(CTL_REG_EIR) & ENC_EIR_TXERIF) {
390 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_TXRST);
391 m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_TXRST);
393 m_nic_bfc(CTL_REG_EIR, (ENC_EIR_TXERIF | ENC_EIR_TXIF));
395 /* set ECON1.TXRTS */
396 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_TXRTS);
402 /*****************************************************************************
403 * This function resets the receiver only. This function may be called from
406 static void encReceiverReset (void)
410 econ1 = m_nic_read (CTL_REG_ECON1);
411 if ((econ1 & ENC_ECON1_RXRST) == 0) {
412 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_RXRST);
413 rxResetCounter = RX_RESET_COUNTER;
417 /*****************************************************************************
418 * receiver reset timer
420 static void encReceiverResetCallback (void)
422 m_nic_bfc (CTL_REG_ECON1, ENC_ECON1_RXRST);
423 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_RXEN); /* enable receive */
426 /*-----------------------------------------------------------------------------
427 * Check for received packets. Call NetReceive for each packet. The return
428 * value is ignored by the caller.
432 if (rxResetCounter > 0 && --rxResetCounter == 0) {
433 encReceiverResetCallback ();
443 m_nic_bfc (CTL_REG_ECON1, ENC_ECON1_RXEN); /* disable receive */
446 /*****************************************************************************/
448 static void encPoll (void)
450 unsigned char eir_reg;
451 volatile unsigned char estat_reg;
452 unsigned char pkt_cnt;
454 #ifdef CONFIG_USE_IRQ
455 /* clear global interrupt enable bit in enc28j60 */
456 m_nic_bfc (CTL_REG_EIE, ENC_EIE_INTIE);
458 estat_reg = m_nic_read (CTL_REG_ESTAT);
460 eir_reg = m_nic_read (CTL_REG_EIR);
462 if (eir_reg & ENC_EIR_TXIF) {
463 /* clear TXIF bit in EIR */
464 m_nic_bfc (CTL_REG_EIR, ENC_EIR_TXIF);
467 /* We have to use pktcnt and not pktif bit, see errata pt. 6 */
470 m_nic_bfc (CTL_REG_ECON1, ENC_ECON1_BSEL1);
471 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_BSEL0);
474 pkt_cnt = m_nic_read (CTL_REG_EPKTCNT);
477 if ((eir_reg & ENC_EIR_PKTIF) == 0) {
478 /*printf("encPoll: pkt cnt > 0, but pktif not set\n"); */
481 /* clear PKTIF bit in EIR, this should not need to be done but it
482 seems like we get problems if we do not */
483 m_nic_bfc (CTL_REG_EIR, ENC_EIR_PKTIF);
486 if (eir_reg & ENC_EIR_RXERIF) {
487 printf ("encPoll: rx error\n");
488 m_nic_bfc (CTL_REG_EIR, ENC_EIR_RXERIF);
490 if (eir_reg & ENC_EIR_TXERIF) {
491 printf ("encPoll: tx error\n");
492 m_nic_bfc (CTL_REG_EIR, ENC_EIR_TXERIF);
495 #ifdef CONFIG_USE_IRQ
496 /* set global interrupt enable bit in enc28j60 */
497 m_nic_bfs (CTL_REG_EIE, ENC_EIE_INTIE);
501 static void encRx (void)
503 unsigned short pkt_len;
504 unsigned short copy_len;
505 unsigned short status;
506 unsigned char eir_reg;
507 unsigned char pkt_cnt = 0;
508 unsigned short rxbuf_rdpt;
510 /* switch to bank 0 */
511 m_nic_bfc (CTL_REG_ECON1, (ENC_ECON1_BSEL1 | ENC_ECON1_BSEL0));
513 m_nic_write (CTL_REG_ERDPTL, next_pointer_lsb);
514 m_nic_write (CTL_REG_ERDPTH, next_pointer_msb);
517 m_nic_read_data (6, buffer);
518 next_pointer_lsb = buffer[0];
519 next_pointer_msb = buffer[1];
521 pkt_len |= (unsigned short) buffer[3] << 8;
523 status |= (unsigned short) buffer[5] << 8;
525 if (pkt_len <= ENC_MAX_FRM_LEN)
530 if ((status & (1L << 7)) == 0) /* check Received Ok bit */
533 /* taken from the Linux driver */
534 /* check if next pointer is resonable */
535 if ((((unsigned int)next_pointer_msb << 8) |
536 (unsigned int)next_pointer_lsb) >= ENC_TX_BUF_START)
540 m_nic_read_data (copy_len, buffer);
543 /* advance read pointer to next pointer */
544 m_nic_write (CTL_REG_ERDPTL, next_pointer_lsb);
545 m_nic_write (CTL_REG_ERDPTH, next_pointer_msb);
547 /* decrease packet counter */
548 m_nic_bfs (CTL_REG_ECON2, ENC_ECON2_PKTDEC);
550 /* taken from the Linux driver */
551 /* Only odd values should be written to ERXRDPTL,
552 * see errata B4 pt.13
554 rxbuf_rdpt = (next_pointer_msb << 8 | next_pointer_lsb) - 1;
555 if ((rxbuf_rdpt < (m_nic_read(CTL_REG_ERXSTH) << 8 |
556 m_nic_read(CTL_REG_ERXSTL))) || (rxbuf_rdpt >
557 (m_nic_read(CTL_REG_ERXNDH) << 8 |
558 m_nic_read(CTL_REG_ERXNDL)))) {
559 m_nic_write(CTL_REG_ERXRDPTL, m_nic_read(CTL_REG_ERXNDL));
560 m_nic_write(CTL_REG_ERXRDPTH, m_nic_read(CTL_REG_ERXNDH));
562 m_nic_write(CTL_REG_ERXRDPTL, rxbuf_rdpt & 0xFF);
563 m_nic_write(CTL_REG_ERXRDPTH, rxbuf_rdpt >> 8);
567 m_nic_bfc (CTL_REG_ECON1, ENC_ECON1_BSEL1);
568 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_BSEL0);
571 pkt_cnt = m_nic_read (CTL_REG_EPKTCNT);
573 /* switch to bank 0 */
574 m_nic_bfc (CTL_REG_ECON1,
575 (ENC_ECON1_BSEL1 | ENC_ECON1_BSEL0));
578 eir_reg = m_nic_read (CTL_REG_EIR);
580 printf ("eth_rx: copy_len=0\n");
584 NetReceive ((unsigned char *) buffer, pkt_len);
586 eir_reg = m_nic_read (CTL_REG_EIR);
587 } while (pkt_cnt); /* Use EPKTCNT not EIR.PKTIF flag, see errata pt. 6 */
590 static void encWriteReg (unsigned char regNo, unsigned char data)
596 spi_write (0x40 | regNo); /* write in regNo */
602 spi_write (0x1f); /* write reg 0x1f */
608 static void encWriteRegRetry (unsigned char regNo, unsigned char data, int c)
610 unsigned char readback;
615 for (i = 0; i < c; i++) {
619 spi_write (0x40 | regNo); /* write in regNo */
625 spi_write (0x1f); /* write reg 0x1f */
629 spi_unlock (); /* we must unlock spi first */
631 readback = encReadReg (regNo);
635 if (readback == data)
641 printf ("enc28j60: write reg %d failed\n", regNo);
645 static unsigned char encReadReg (unsigned char regNo)
647 unsigned char rxByte;
653 spi_write (0x1f); /* read reg 0x1f */
655 bank = spi_read () & 0x3;
661 rxByte = spi_read ();
663 /* check if MAC or MII register */
664 if (((bank == 2) && (regNo <= 0x1a)) ||
665 ((bank == 3) && (regNo <= 0x05 || regNo == 0x0a))) {
666 /* ignore first byte and read another byte */
667 rxByte = spi_read ();
676 static void encReadBuff (unsigned short length, unsigned char *pBuff)
682 spi_write (0x20 | 0x1a); /* read buffer memory */
686 *pBuff++ = spi_read ();
695 static void encWriteBuff (unsigned short length, unsigned char *pBuff)
701 spi_write (0x60 | 0x1a); /* write buffer memory */
703 spi_write (0x00); /* control byte */
706 spi_write (*pBuff++);
712 static void encBitSet (unsigned char regNo, unsigned char data)
718 spi_write (0x80 | regNo); /* bit field set */
725 static void encBitClr (unsigned char regNo, unsigned char data)
731 spi_write (0xA0 | regNo); /* bit field clear */
738 static void encReset (void)
744 spi_write (0xff); /* soft reset */
749 /* sleep 1 ms. See errata pt. 2 */
753 static void encInit (unsigned char *pEthAddr)
755 unsigned short phid1 = 0;
756 unsigned short phid2 = 0;
758 /* switch to bank 0 */
759 m_nic_bfc (CTL_REG_ECON1, (ENC_ECON1_BSEL1 | ENC_ECON1_BSEL0));
762 * Setup the buffer space. The reset values are valid for the
765 /* We shall not write to ERXST, see errata pt. 5. Instead we
766 have to make sure that ENC_RX_BUS_START is 0. */
767 m_nic_write_retry (CTL_REG_ERXSTL, (ENC_RX_BUF_START & 0xFF), 1);
768 m_nic_write_retry (CTL_REG_ERXSTH, (ENC_RX_BUF_START >> 8), 1);
770 /* taken from the Linux driver */
771 m_nic_write_retry (CTL_REG_ERXNDL, (ENC_RX_BUF_END & 0xFF), 1);
772 m_nic_write_retry (CTL_REG_ERXNDH, (ENC_RX_BUF_END >> 8), 1);
774 m_nic_write_retry (CTL_REG_ERDPTL, (ENC_RX_BUF_START & 0xFF), 1);
775 m_nic_write_retry (CTL_REG_ERDPTH, (ENC_RX_BUF_START >> 8), 1);
777 next_pointer_lsb = (ENC_RX_BUF_START & 0xFF);
778 next_pointer_msb = (ENC_RX_BUF_START >> 8);
780 /* verify identification */
781 phid1 = phyRead (PHY_REG_PHID1);
782 phid2 = phyRead (PHY_REG_PHID2);
784 if (phid1 != ENC_PHID1_VALUE
785 || (phid2 & ENC_PHID2_MASK) != ENC_PHID2_VALUE) {
786 printf ("ERROR: failed to identify controller\n");
787 printf ("phid1 = %x, phid2 = %x\n",
788 phid1, (phid2 & ENC_PHID2_MASK));
789 printf ("should be phid1 = %x, phid2 = %x\n",
790 ENC_PHID1_VALUE, ENC_PHID2_VALUE);
794 * --- MAC Initialization ---
797 /* Pull MAC out of Reset */
799 /* switch to bank 2 */
800 m_nic_bfc (CTL_REG_ECON1, ENC_ECON1_BSEL0);
801 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_BSEL1);
803 /* enable MAC to receive frames */
804 /* added some bits from the Linux driver */
805 m_nic_write_retry (CTL_REG_MACON1
806 ,(ENC_MACON1_MARXEN | ENC_MACON1_TXPAUS | ENC_MACON1_RXPAUS)
809 /* configure pad, tx-crc and duplex */
810 /* added a bit from the Linux driver */
811 m_nic_write_retry (CTL_REG_MACON3
812 ,(ENC_MACON3_PADCFG0 | ENC_MACON3_TXCRCEN | ENC_MACON3_FRMLNEN)
815 /* added 4 new lines from the Linux driver */
816 /* Allow infinite deferals if the medium is continously busy */
817 m_nic_write_retry(CTL_REG_MACON4, (1<<6) /*ENC_MACON4_DEFER*/, 10);
819 /* Late collisions occur beyond 63 bytes */
820 m_nic_write_retry(CTL_REG_MACLCON2, 63, 10);
822 /* Set (low byte) Non-Back-to_Back Inter-Packet Gap. Recommended 0x12 */
823 m_nic_write_retry(CTL_REG_MAIPGL, 0x12, 10);
826 * Set (high byte) Non-Back-to_Back Inter-Packet Gap. Recommended
827 * 0x0c for half-duplex. Nothing for full-duplex
829 m_nic_write_retry(CTL_REG_MAIPGH, 0x0C, 10);
831 /* set maximum frame length */
832 m_nic_write_retry (CTL_REG_MAMXFLL, (ENC_MAX_FRM_LEN & 0xff), 10);
833 m_nic_write_retry (CTL_REG_MAMXFLH, (ENC_MAX_FRM_LEN >> 8), 10);
836 * Set MAC back-to-back inter-packet gap. Recommended 0x12 for half duplex
837 * and 0x15 for full duplex.
839 m_nic_write_retry (CTL_REG_MABBIPG, 0x12, 10);
841 /* set MAC address */
843 /* switch to bank 3 */
844 m_nic_bfs (CTL_REG_ECON1, (ENC_ECON1_BSEL0 | ENC_ECON1_BSEL1));
846 m_nic_write_retry (CTL_REG_MAADR0, pEthAddr[5], 1);
847 m_nic_write_retry (CTL_REG_MAADR1, pEthAddr[4], 1);
848 m_nic_write_retry (CTL_REG_MAADR2, pEthAddr[3], 1);
849 m_nic_write_retry (CTL_REG_MAADR3, pEthAddr[2], 1);
850 m_nic_write_retry (CTL_REG_MAADR4, pEthAddr[1], 1);
851 m_nic_write_retry (CTL_REG_MAADR5, pEthAddr[0], 1);
854 * PHY Initialization taken from the Linux driver
857 /* Prevent automatic loopback of data beeing transmitted by setting
859 phyWrite(PHY_REG_PHCON2, (1<<8));
861 /* LEDs configuration
862 * LEDA: LACFG = 0100 -> display link status
863 * LEDB: LBCFG = 0111 -> display TX & RX activity
864 * STRCH = 1 -> LED pulses
866 phyWrite(PHY_REG_PHLCON, 0x0472);
868 /* Reset PDPXMD-bit => half duplex */
869 phyWrite(PHY_REG_PHCON1, 0);
875 #ifdef CONFIG_USE_IRQ
876 /* enable interrupts */
877 m_nic_bfs (CTL_REG_EIE, ENC_EIE_PKTIE);
878 m_nic_bfs (CTL_REG_EIE, ENC_EIE_TXIE);
879 m_nic_bfs (CTL_REG_EIE, ENC_EIE_RXERIE);
880 m_nic_bfs (CTL_REG_EIE, ENC_EIE_TXERIE);
881 m_nic_bfs (CTL_REG_EIE, ENC_EIE_INTIE);
885 /*****************************************************************************
888 * Read PHY registers.
890 * NOTE! This function will change to Bank 2.
893 * [in] addr address of the register to read
896 * The value in the register
898 static unsigned short phyRead (unsigned char addr)
900 unsigned short ret = 0;
903 m_nic_bfc (CTL_REG_ECON1, ENC_ECON1_BSEL0);
904 m_nic_bfs (CTL_REG_ECON1, ENC_ECON1_BSEL1);
906 /* write address to MIREGADR */
907 m_nic_write (CTL_REG_MIREGADR, addr);
909 /* set MICMD.MIIRD */
910 m_nic_write (CTL_REG_MICMD, ENC_MICMD_MIIRD);
912 /* taken from the Linux driver */
914 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL0);
915 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1);
917 /* poll MISTAT.BUSY bit until operation is complete */
918 while ((m_nic_read (CTL_REG_MISTAT) & ENC_MISTAT_BUSY) != 0) {
922 /* GJ - this seems extremely dangerous! */
928 /* taken from the Linux driver */
930 m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_BSEL0);
931 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1);
933 /* clear MICMD.MIIRD */
934 m_nic_write (CTL_REG_MICMD, 0);
936 ret = (m_nic_read (CTL_REG_MIRDH) << 8);
937 ret |= (m_nic_read (CTL_REG_MIRDL) & 0xFF);
942 /*****************************************************************************
944 * Taken from the Linux driver.
946 * Write PHY registers.
948 * NOTE! This function will change to Bank 3.
951 * [in] addr address of the register to write to
952 * [in] data to be written
957 static void phyWrite(unsigned char addr, unsigned short data)
960 m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_BSEL0);
961 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1);
963 /* write address to MIREGADR */
964 m_nic_write(CTL_REG_MIREGADR, addr);
966 m_nic_write(CTL_REG_MIWRL, data & 0xff);
967 m_nic_write(CTL_REG_MIWRH, data >> 8);
970 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL0);
971 m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1);
973 /* poll MISTAT.BUSY bit until operation is complete */
974 while((m_nic_read(CTL_REG_MISTAT) & ENC_MISTAT_BUSY) != 0) {
983 #endif /* CONFIG_ENC28J60 */