/* * Copyright (c) 2008 Embedded Alley Solutions, Inc. * * (C) Copyright 2009 Freescale Semiconductor, Inc. * * Based on drivers/net/enc28j60.c * * The original driver is tied to LPC2292 SPI interface. So SPI * layer had to be changed in order to get the driver working for * STMP378x. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include #include #ifdef CONFIG_ENC28J60_ETH #include #include /* * Control Registers in Bank 0 */ #define CTL_REG_ERDPTL 0x00 #define CTL_REG_ERDPTH 0x01 #define CTL_REG_EWRPTL 0x02 #define CTL_REG_EWRPTH 0x03 #define CTL_REG_ETXSTL 0x04 #define CTL_REG_ETXSTH 0x05 #define CTL_REG_ETXNDL 0x06 #define CTL_REG_ETXNDH 0x07 #define CTL_REG_ERXSTL 0x08 #define CTL_REG_ERXSTH 0x09 #define CTL_REG_ERXNDL 0x0A #define CTL_REG_ERXNDH 0x0B #define CTL_REG_ERXRDPTL 0x0C #define CTL_REG_ERXRDPTH 0x0D #define CTL_REG_ERXWRPTL 0x0E #define CTL_REG_ERXWRPTH 0x0F #define CTL_REG_EDMASTL 0x10 #define CTL_REG_EDMASTH 0x11 #define CTL_REG_EDMANDL 0x12 #define CTL_REG_EDMANDH 0x13 #define CTL_REG_EDMADSTL 0x14 #define CTL_REG_EDMADSTH 0x15 #define CTL_REG_EDMACSL 0x16 #define CTL_REG_EDMACSH 0x17 /* these are common in all banks */ #define CTL_REG_EIE 0x1B #define CTL_REG_EIR 0x1C #define CTL_REG_ESTAT 0x1D #define CTL_REG_ECON2 0x1E #define CTL_REG_ECON1 0x1F /* * Control Registers in Bank 1 */ #define CTL_REG_EHT0 0x00 #define CTL_REG_EHT1 0x01 #define CTL_REG_EHT2 0x02 #define CTL_REG_EHT3 0x03 #define CTL_REG_EHT4 0x04 #define CTL_REG_EHT5 0x05 #define CTL_REG_EHT6 0x06 #define CTL_REG_EHT7 0x07 #define CTL_REG_EPMM0 0x08 #define CTL_REG_EPMM1 0x09 #define CTL_REG_EPMM2 0x0A #define CTL_REG_EPMM3 0x0B #define CTL_REG_EPMM4 0x0C #define CTL_REG_EPMM5 0x0D #define CTL_REG_EPMM6 0x0E #define CTL_REG_EPMM7 0x0F #define CTL_REG_EPMCSL 0x10 #define CTL_REG_EPMCSH 0x11 #define CTL_REG_EPMOL 0x14 #define CTL_REG_EPMOH 0x15 #define CTL_REG_EWOLIE 0x16 #define CTL_REG_EWOLIR 0x17 #define CTL_REG_ERXFCON 0x18 #define CTL_REG_EPKTCNT 0x19 /* * Control Registers in Bank 2 */ #define CTL_REG_MACON1 0x00 #define CTL_REG_MACON2 0x01 #define CTL_REG_MACON3 0x02 #define CTL_REG_MACON4 0x03 #define CTL_REG_MABBIPG 0x04 #define CTL_REG_MAIPGL 0x06 #define CTL_REG_MAIPGH 0x07 #define CTL_REG_MACLCON1 0x08 #define CTL_REG_MACLCON2 0x09 #define CTL_REG_MAMXFLL 0x0A #define CTL_REG_MAMXFLH 0x0B #define CTL_REG_MAPHSUP 0x0D #define CTL_REG_MICON 0x11 #define CTL_REG_MICMD 0x12 #define CTL_REG_MIREGADR 0x14 #define CTL_REG_MIWRL 0x16 #define CTL_REG_MIWRH 0x17 #define CTL_REG_MIRDL 0x18 #define CTL_REG_MIRDH 0x19 /* * Control Registers in Bank 3 */ #define CTL_REG_MAADR1 0x00 #define CTL_REG_MAADR0 0x01 #define CTL_REG_MAADR3 0x02 #define CTL_REG_MAADR2 0x03 #define CTL_REG_MAADR5 0x04 #define CTL_REG_MAADR4 0x05 #define CTL_REG_EBSTSD 0x06 #define CTL_REG_EBSTCON 0x07 #define CTL_REG_EBSTCSL 0x08 #define CTL_REG_EBSTCSH 0x09 #define CTL_REG_MISTAT 0x0A #define CTL_REG_EREVID 0x12 #define CTL_REG_ECOCON 0x15 #define CTL_REG_EFLOCON 0x17 #define CTL_REG_EPAUSL 0x18 #define CTL_REG_EPAUSH 0x19 /* * PHY Register */ #define PHY_REG_PHID1 0x02 #define PHY_REG_PHID2 0x03 /* taken from the Linux driver */ #define PHY_REG_PHCON1 0x00 #define PHY_REG_PHCON2 0x10 #define PHY_REG_PHLCON 0x14 /* * Receive Filter Register (ERXFCON) bits */ #define ENC_RFR_UCEN 0x80 #define ENC_RFR_ANDOR 0x40 #define ENC_RFR_CRCEN 0x20 #define ENC_RFR_PMEN 0x10 #define ENC_RFR_MPEN 0x08 #define ENC_RFR_HTEN 0x04 #define ENC_RFR_MCEN 0x02 #define ENC_RFR_BCEN 0x01 /* * ECON1 Register Bits */ #define ENC_ECON1_TXRST 0x80 #define ENC_ECON1_RXRST 0x40 #define ENC_ECON1_DMAST 0x20 #define ENC_ECON1_CSUMEN 0x10 #define ENC_ECON1_TXRTS 0x08 #define ENC_ECON1_RXEN 0x04 #define ENC_ECON1_BSEL1 0x02 #define ENC_ECON1_BSEL0 0x01 /* * ECON2 Register Bits */ #define ENC_ECON2_AUTOINC 0x80 #define ENC_ECON2_PKTDEC 0x40 #define ENC_ECON2_PWRSV 0x20 #define ENC_ECON2_VRPS 0x08 /* * EIR Register Bits */ #define ENC_EIR_PKTIF 0x40 #define ENC_EIR_DMAIF 0x20 #define ENC_EIR_LINKIF 0x10 #define ENC_EIR_TXIF 0x08 #define ENC_EIR_WOLIF 0x04 #define ENC_EIR_TXERIF 0x02 #define ENC_EIR_RXERIF 0x01 /* * ESTAT Register Bits */ #define ENC_ESTAT_INT 0x80 #define ENC_ESTAT_LATECOL 0x10 #define ENC_ESTAT_RXBUSY 0x04 #define ENC_ESTAT_TXABRT 0x02 #define ENC_ESTAT_CLKRDY 0x01 /* * EIE Register Bits */ #define ENC_EIE_INTIE 0x80 #define ENC_EIE_PKTIE 0x40 #define ENC_EIE_DMAIE 0x20 #define ENC_EIE_LINKIE 0x10 #define ENC_EIE_TXIE 0x08 #define ENC_EIE_WOLIE 0x04 #define ENC_EIE_TXERIE 0x02 #define ENC_EIE_RXERIE 0x01 /* * MACON1 Register Bits */ #define ENC_MACON1_LOOPBK 0x10 #define ENC_MACON1_TXPAUS 0x08 #define ENC_MACON1_RXPAUS 0x04 #define ENC_MACON1_PASSALL 0x02 #define ENC_MACON1_MARXEN 0x01 /* * MACON2 Register Bits */ #define ENC_MACON2_MARST 0x80 #define ENC_MACON2_RNDRST 0x40 #define ENC_MACON2_MARXRST 0x08 #define ENC_MACON2_RFUNRST 0x04 #define ENC_MACON2_MATXRST 0x02 #define ENC_MACON2_TFUNRST 0x01 /* * MACON3 Register Bits */ #define ENC_MACON3_PADCFG2 0x80 #define ENC_MACON3_PADCFG1 0x40 #define ENC_MACON3_PADCFG0 0x20 #define ENC_MACON3_TXCRCEN 0x10 #define ENC_MACON3_PHDRLEN 0x08 #define ENC_MACON3_HFRMEN 0x04 #define ENC_MACON3_FRMLNEN 0x02 #define ENC_MACON3_FULDPX 0x01 /* * MICMD Register Bits */ #define ENC_MICMD_MIISCAN 0x02 #define ENC_MICMD_MIIRD 0x01 /* * MISTAT Register Bits */ #define ENC_MISTAT_NVALID 0x04 #define ENC_MISTAT_SCAN 0x02 #define ENC_MISTAT_BUSY 0x01 /* * PHID1 and PHID2 values */ #define ENC_PHID1_VALUE 0x0083 #define ENC_PHID2_VALUE 0x1400 #define ENC_PHID2_MASK 0xFC00 #define FAILSAFE_VALUE 5000 /* * Controller memory layout: * * 0x0000 - 0x17ff 6k bytes receive buffer * 0x1800 - 0x1fff 2k bytes transmit buffer */ /* Use the lower memory for receiver buffer. See errata pt. 5 */ #define ENC_RX_BUF_START 0x0000 #define ENC_TX_BUF_START 0x1800 /* taken from the Linux driver */ #define ENC_RX_BUF_END 0x17ff #define ENC_TX_BUF_END 0x1fff /* maximum frame length */ #define ENC_MAX_FRM_LEN 1518 static unsigned char encReadReg(unsigned char regNo); static void encWriteReg(unsigned char regNo, unsigned char data); static void encWriteRegRetry(unsigned char regNo, unsigned char data, int c); static void encReadBuff(unsigned short length, unsigned char *pBuff); static void encWriteBuff(unsigned short length, unsigned char *pBuff); static void encBitSet(unsigned char regNo, unsigned char data); static void encBitClr(unsigned char regNo, unsigned char data); static unsigned short encPhyRead(unsigned char addr); static void encPhyWrite(unsigned char, unsigned short); static void encReset(void); static void encInit(unsigned char *pEthAddr); static void encReceiverReset(void); static void encReceiverResetCallback(void); static void encPoll(void); static void encRx(void); #define m_nic_read(reg) encReadReg(reg) #define m_nic_write(reg, data) encWriteReg(reg, data) #define m_nic_write_retry(reg, data, count) encWriteRegRetry(reg, data, count) #define m_nic_read_data(len, buf) encReadBuff((len), (buf)) #define m_nic_write_data(len, buf) encWriteBuff((len), (buf)) /* bit field set */ #define m_nic_bfs(reg, data) encBitSet(reg, data) /* bit field clear */ #define m_nic_bfc(reg, data) encBitClr(reg, data) /* current bank in enc28j60 */ static unsigned char next_pointer_lsb; static unsigned char next_pointer_msb; static unsigned char buffer[ENC_MAX_FRM_LEN]; static int rxResetCounter; #define RX_RESET_COUNTER 1000; /****************************************************************************** * U-boot network stack interfaces * *****************************************************************************/ /* * Always returns 0 */ int eth_init(bd_t *bis) { unsigned char estatVal; unsigned char enetaddr[6]; /* taken from the Linux driver - dangerous stuff here! */ /* Wait for CLKRDY to become set (i.e., check that we can * communicate with the ENC) */ do { estatVal = m_nic_read(CTL_REG_ESTAT); } while ((estatVal & 0x08) || (~estatVal & ENC_ESTAT_CLKRDY)); /* initialize controller */ encReset(); eth_getenv_enetaddr("ethaddr", enetaddr); encInit(enetaddr); m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_RXEN); /* enable receive */ return 0; } int eth_send(volatile void *packet, int length) { /* check frame length, etc. */ /* TODO: */ /* switch to bank 0 */ m_nic_bfc(CTL_REG_ECON1, (ENC_ECON1_BSEL1 | ENC_ECON1_BSEL0)); /* set EWRPT */ m_nic_write(CTL_REG_EWRPTL, (ENC_TX_BUF_START & 0xff)); m_nic_write(CTL_REG_EWRPTH, (ENC_TX_BUF_START >> 8)); /* set ETXND */ m_nic_write(CTL_REG_ETXNDL, (length + ENC_TX_BUF_START) & 0xFF); m_nic_write(CTL_REG_ETXNDH, (length + ENC_TX_BUF_START) >> 8); /* set ETXST */ m_nic_write(CTL_REG_ETXSTL, ENC_TX_BUF_START & 0xFF); m_nic_write(CTL_REG_ETXSTH, ENC_TX_BUF_START >> 8); /* write packet */ m_nic_write_data(length, (unsigned char *) packet); /* taken from the Linux driver */ /* Verify that the internal transmit logic has not been altered * by excessive collisions. See Errata B4 12 and 14. */ if (m_nic_read(CTL_REG_EIR) & ENC_EIR_TXERIF) { m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_TXRST); m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_TXRST); } m_nic_bfc(CTL_REG_EIR, (ENC_EIR_TXERIF | ENC_EIR_TXIF)); /* set ECON1.TXRTS */ m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_TXRTS); return 0; } /* * Check for received packets. Call NetReceive for each packet. The return * value is ignored by the caller. */ int eth_rx(void) { if (rxResetCounter > 0 && --rxResetCounter == 0) encReceiverResetCallback(); encPoll(); return 0; } void eth_halt(void) { m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_RXEN); /* disable receive */ } /****************************************************************************** * ENC28J60 interface * *****************************************************************************/ /* * This function resets the receiver only. This function may be called from * interrupt-context. */ static void encReceiverReset(void) { unsigned char econ1; econ1 = m_nic_read(CTL_REG_ECON1); if ((econ1 & ENC_ECON1_RXRST) == 0) { m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_RXRST); rxResetCounter = RX_RESET_COUNTER; } } /* * receiver reset timer */ static void encReceiverResetCallback(void) { m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_RXRST); m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_RXEN); /* enable receive */ } /* * poll for events */ static void encPoll(void) { unsigned char eir_reg; volatile unsigned char estat_reg; unsigned char pkt_cnt; #ifdef CONFIG_USE_IRQ /* clear global interrupt enable bit in enc28j60 */ m_nic_bfc(CTL_REG_EIE, ENC_EIE_INTIE); #endif estat_reg = m_nic_read(CTL_REG_ESTAT); eir_reg = m_nic_read(CTL_REG_EIR); if (eir_reg & ENC_EIR_TXIF) { /* clear TXIF bit in EIR */ m_nic_bfc(CTL_REG_EIR, ENC_EIR_TXIF); } /* We have to use pktcnt and not pktif bit, see errata pt. 6 */ /* move to bank 1 */ m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_BSEL1); m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL0); /* read pktcnt */ pkt_cnt = m_nic_read(CTL_REG_EPKTCNT); if (pkt_cnt > 0) { if ((eir_reg & ENC_EIR_PKTIF) == 0) { /*printf("encPoll: pkt cnt > 0, but pktif not set\n"); */ } encRx(); /* clear PKTIF bit in EIR, this should not need to be done * but it seems like we get problems if we do not */ m_nic_bfc(CTL_REG_EIR, ENC_EIR_PKTIF); } if (eir_reg & ENC_EIR_RXERIF) { printf("encPoll: rx error\n"); m_nic_bfc(CTL_REG_EIR, ENC_EIR_RXERIF); } if (eir_reg & ENC_EIR_TXERIF) { printf("encPoll: tx error\n"); m_nic_bfc(CTL_REG_EIR, ENC_EIR_TXERIF); } #ifdef CONFIG_USE_IRQ /* set global interrupt enable bit in enc28j60 */ m_nic_bfs(CTL_REG_EIE, ENC_EIE_INTIE); #endif } /* * Receive packet */ static void encRx(void) { unsigned short pkt_len; unsigned short copy_len; unsigned short status; unsigned char eir_reg; unsigned char pkt_cnt = 0; unsigned short rxbuf_rdpt; /* switch to bank 0 */ m_nic_bfc(CTL_REG_ECON1, (ENC_ECON1_BSEL1 | ENC_ECON1_BSEL0)); m_nic_write(CTL_REG_ERDPTL, next_pointer_lsb); m_nic_write(CTL_REG_ERDPTH, next_pointer_msb); do { m_nic_read_data(6, buffer); next_pointer_lsb = buffer[0]; next_pointer_msb = buffer[1]; pkt_len = buffer[2]; pkt_len |= (unsigned short) buffer[3] << 8; status = buffer[4]; status |= (unsigned short) buffer[5] << 8; if (pkt_len <= ENC_MAX_FRM_LEN) copy_len = pkt_len; else copy_len = 0; if ((status & (1L << 7)) == 0) /* check Received Ok bit */ copy_len = 0; /* taken from the Linux driver */ /* check if next pointer is resonable */ if ((((unsigned int)next_pointer_msb << 8) | (unsigned int)next_pointer_lsb) >= ENC_TX_BUF_START) copy_len = 0; if (copy_len > 0) { m_nic_read_data(copy_len, buffer); } /* advance read pointer to next pointer */ m_nic_write(CTL_REG_ERDPTL, next_pointer_lsb); m_nic_write(CTL_REG_ERDPTH, next_pointer_msb); /* decrease packet counter */ m_nic_bfs(CTL_REG_ECON2, ENC_ECON2_PKTDEC); /* taken from the Linux driver */ /* Only odd values should be written to ERXRDPTL, * see errata B4 pt.13 */ rxbuf_rdpt = (next_pointer_msb << 8 | next_pointer_lsb) - 1; if ((rxbuf_rdpt < (m_nic_read(CTL_REG_ERXSTH) << 8 | m_nic_read(CTL_REG_ERXSTL))) || (rxbuf_rdpt > (m_nic_read(CTL_REG_ERXNDH) << 8 | m_nic_read(CTL_REG_ERXNDL)))) { m_nic_write(CTL_REG_ERXRDPTL, m_nic_read(CTL_REG_ERXNDL)); m_nic_write(CTL_REG_ERXRDPTH, m_nic_read(CTL_REG_ERXNDH)); } else { m_nic_write(CTL_REG_ERXRDPTL, rxbuf_rdpt & 0xFF); m_nic_write(CTL_REG_ERXRDPTH, rxbuf_rdpt >> 8); } /* move to bank 1 */ m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_BSEL1); m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL0); /* read pktcnt */ pkt_cnt = m_nic_read(CTL_REG_EPKTCNT); /* switch to bank 0 */ m_nic_bfc(CTL_REG_ECON1, (ENC_ECON1_BSEL1 | ENC_ECON1_BSEL0)); if (copy_len == 0) { eir_reg = m_nic_read(CTL_REG_EIR); encReceiverReset(); printf("eth_rx: copy_len=0\n"); continue; } NetReceive((unsigned char *) buffer, pkt_len); eir_reg = m_nic_read(CTL_REG_EIR); } while (pkt_cnt); /* Use EPKTCNT not EIR.PKTIF flag, see errata pt. 6 */ } static void encInit(unsigned char *pEthAddr) { unsigned short phid1 = 0; unsigned short phid2 = 0; /* switch to bank 0 */ m_nic_bfc(CTL_REG_ECON1, (ENC_ECON1_BSEL1 | ENC_ECON1_BSEL0)); /* * Setup the buffer space. The reset values are valid for the * other pointers. */ /* We shall not write to ERXST, see errata pt. 5. Instead we have to make sure that ENC_RX_BUS_START is 0. */ m_nic_write_retry(CTL_REG_ERXSTL, (ENC_RX_BUF_START & 0xFF), 1); m_nic_write_retry(CTL_REG_ERXSTH, (ENC_RX_BUF_START >> 8), 1); /* taken from the Linux driver */ m_nic_write_retry(CTL_REG_ERXNDL, (ENC_RX_BUF_END & 0xFF), 1); m_nic_write_retry(CTL_REG_ERXNDH, (ENC_RX_BUF_END >> 8), 1); m_nic_write_retry(CTL_REG_ERDPTL, (ENC_RX_BUF_START & 0xFF), 1); m_nic_write_retry(CTL_REG_ERDPTH, (ENC_RX_BUF_START >> 8), 1); next_pointer_lsb = (ENC_RX_BUF_START & 0xFF); next_pointer_msb = (ENC_RX_BUF_START >> 8); /* verify identification */ phid1 = encPhyRead(PHY_REG_PHID1); phid2 = encPhyRead(PHY_REG_PHID2); if (phid1 != ENC_PHID1_VALUE || (phid2 & ENC_PHID2_MASK) != ENC_PHID2_VALUE) { printf("ERROR: failed to identify controller\n"); printf("phid1 = %x, phid2 = %x\n", phid1, (phid2 & ENC_PHID2_MASK)); printf("should be phid1 = %x, phid2 = %x\n", ENC_PHID1_VALUE, ENC_PHID2_VALUE); } /* * --- MAC Initialization --- */ /* Pull MAC out of Reset */ /* switch to bank 2 */ m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_BSEL0); m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1); /* enable MAC to receive frames */ /* added some bits from the Linux driver */ m_nic_write_retry(CTL_REG_MACON1 , (ENC_MACON1_MARXEN | ENC_MACON1_TXPAUS | ENC_MACON1_RXPAUS) , 10); /* configure pad, tx-crc and duplex */ /* added a bit from the Linux driver */ m_nic_write_retry(CTL_REG_MACON3 , (ENC_MACON3_PADCFG0 | ENC_MACON3_TXCRCEN | ENC_MACON3_FRMLNEN) , 10); /* added 4 new lines from the Linux driver */ /* Allow infinite deferals if the medium is continously busy */ m_nic_write_retry(CTL_REG_MACON4, (1<<6) /*ENC_MACON4_DEFER*/, 10); /* Late collisions occur beyond 63 bytes */ m_nic_write_retry(CTL_REG_MACLCON2, 63, 10); /* Set (low byte) Non-Back-to_Back Inter-Packet Gap. Recommended 0x12 */ m_nic_write_retry(CTL_REG_MAIPGL, 0x12, 10); /* * Set (high byte) Non-Back-to_Back Inter-Packet Gap. Recommended * 0x0c for half-duplex. Nothing for full-duplex */ m_nic_write_retry(CTL_REG_MAIPGH, 0x0C, 10); /* set maximum frame length */ m_nic_write_retry(CTL_REG_MAMXFLL, (ENC_MAX_FRM_LEN & 0xff), 10); m_nic_write_retry(CTL_REG_MAMXFLH, (ENC_MAX_FRM_LEN >> 8), 10); /* * Set MAC back-to-back inter-packet gap. Recommended 0x12 for * half duplex and 0x15 for full duplex. */ m_nic_write_retry(CTL_REG_MABBIPG, 0x12, 10); /* set MAC address */ /* switch to bank 3 */ m_nic_bfs(CTL_REG_ECON1, (ENC_ECON1_BSEL0 | ENC_ECON1_BSEL1)); m_nic_write_retry(CTL_REG_MAADR0, pEthAddr[5], 1); m_nic_write_retry(CTL_REG_MAADR1, pEthAddr[4], 1); m_nic_write_retry(CTL_REG_MAADR2, pEthAddr[3], 1); m_nic_write_retry(CTL_REG_MAADR3, pEthAddr[2], 1); m_nic_write_retry(CTL_REG_MAADR4, pEthAddr[1], 1); m_nic_write_retry(CTL_REG_MAADR5, pEthAddr[0], 1); /* * PHY Initialization taken from the Linux driver */ /* Prevent automatic loopback of data beeing transmitted by setting ENC_PHCON2_HDLDIS */ encPhyWrite(PHY_REG_PHCON2, (1<<8)); /* LEDs configuration * LEDA: LACFG = 0100 -> display link status * LEDB: LBCFG = 0111 -> display TX & RX activity * STRCH = 1 -> LED pulses */ encPhyWrite(PHY_REG_PHLCON, 0x0472); /* Reset PDPXMD-bit => half duplex */ encPhyWrite(PHY_REG_PHCON1, 0); /* * Receive settings */ #ifdef CONFIG_USE_IRQ /* enable interrupts */ m_nic_bfs(CTL_REG_EIE, ENC_EIE_PKTIE); m_nic_bfs(CTL_REG_EIE, ENC_EIE_TXIE); m_nic_bfs(CTL_REG_EIE, ENC_EIE_RXERIE); m_nic_bfs(CTL_REG_EIE, ENC_EIE_TXERIE); m_nic_bfs(CTL_REG_EIE, ENC_EIE_INTIE); #endif } /* * * Description: * Read PHY registers. * * NOTE! This function will change to Bank 2. * * Params: * [in] addr address of the register to read * * Returns: * The value in the register */ static unsigned short encPhyRead(unsigned char addr) { unsigned short ret = 0; /* move to bank 2 */ m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_BSEL0); m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1); /* write address to MIREGADR */ m_nic_write(CTL_REG_MIREGADR, addr); /* set MICMD.MIIRD */ m_nic_write(CTL_REG_MICMD, ENC_MICMD_MIIRD); /* taken from the Linux driver */ /* move to bank 3 */ m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL0); m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1); /* poll MISTAT.BUSY bit until operation is complete */ while ((m_nic_read(CTL_REG_MISTAT) & ENC_MISTAT_BUSY) != 0) { static int cnt; if (cnt++ >= 1000) { /* GJ - this seems extremely dangerous! */ /* printf("#"); */ cnt = 0; } } /* taken from the Linux driver */ /* move to bank 2 */ m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_BSEL0); m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1); /* clear MICMD.MIIRD */ m_nic_write(CTL_REG_MICMD, 0); ret = (m_nic_read(CTL_REG_MIRDH) << 8); ret |= (m_nic_read(CTL_REG_MIRDL) & 0xFF); return ret; } /* * Taken from the Linux driver. * Description: * Write PHY registers. * * NOTE! This function will change to Bank 3. * * Params: * [in] addr address of the register to write to * [in] data to be written * * Returns: * None */ static void encPhyWrite(unsigned char addr, unsigned short data) { /* move to bank 2 */ m_nic_bfc(CTL_REG_ECON1, ENC_ECON1_BSEL0); m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1); /* write address to MIREGADR */ m_nic_write(CTL_REG_MIREGADR, addr); m_nic_write(CTL_REG_MIWRL, data & 0xff); m_nic_write(CTL_REG_MIWRH, data >> 8); /* move to bank 3 */ m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL0); m_nic_bfs(CTL_REG_ECON1, ENC_ECON1_BSEL1); /* poll MISTAT.BUSY bit until operation is complete */ while ((m_nic_read(CTL_REG_MISTAT) & ENC_MISTAT_BUSY) != 0) { static int cnt; if (cnt++ >= 1000) { cnt = 0; } } } /****************************************************************************** * ENC28J60 SPI layer * *****************************************************************************/ /* Phase = 0, Polarity = 0 */ #define enc_cfg_spi() \ spi_set_cfg(CONFIG_ENC28J60_ETH_SPI_BUS, CONFIG_ENC28J60_ETH_SPI_CS, 0) static void encWriteReg(unsigned char regNo, unsigned char data) { char dout[2]; char din[1]; spi_lock(); enc_cfg_spi(); dout[0] = 0x40 | regNo; dout[1] = data; spi_txrx(dout, 2, 0, 0, SPI_START | SPI_STOP); dout[0] = 0x1f; spi_txrx(dout, 1, din, 1, SPI_START | SPI_STOP); spi_unlock(); } static void encWriteRegRetry(unsigned char regNo, unsigned char data, int c) { unsigned char readback; int i; for (i = 0; i < c; i++) { encWriteReg(regNo, data); readback = encReadReg(regNo); if (readback == data) break; } if (i == c) printf("enc28j60: write reg %d failed\n", regNo); } static unsigned char encReadReg(unsigned char regNo) { char dout[1]; char din[2]; char rxByte; unsigned char bank; spi_lock(); enc_cfg_spi(); dout[0] = 0x1f; spi_txrx(dout, 1, din, 1, SPI_START | SPI_STOP); bank = din[0] & 0x3; dout[0] = regNo; spi_txrx(dout, 1, din, 2, SPI_START | SPI_STOP); rxByte = din[0]; /* check if MAC or MII register */ if (((bank == 2) && (regNo <= 0x1a)) || ((bank == 3) && (regNo <= 0x05 || regNo == 0x0a))) /* ignore first byte and read another byte */ rxByte = din[0]; else rxByte = din[1]; spi_unlock(); return rxByte; } static void encReadBuff(unsigned short length, unsigned char *pBuff) { char dout[1]; spi_lock(); enc_cfg_spi(); dout[0] = 0x20 | 0x1a; spi_txrx(dout, 1, pBuff, length, SPI_START | SPI_STOP); spi_unlock(); } static void encWriteBuff(unsigned short length, unsigned char *pBuff) { char dout[2]; spi_lock(); enc_cfg_spi(); /* Sent command and control word, do not deasser CS */ dout[0] = 0x60 | 0x1a; dout[1] = 0x0; spi_txrx(dout, 2, 0, 0, SPI_START); /* Send data and deassert CS */ spi_txrx(pBuff, length, 0, 0, SPI_STOP); spi_unlock(); } static void encBitSet(unsigned char regNo, unsigned char data) { char dout[2]; spi_lock(); enc_cfg_spi(); dout[0] = 0x80 | regNo; /* Bit field set */ dout[1] = data; spi_txrx(dout, 2, 0, 0, SPI_START | SPI_STOP); spi_unlock(); } static void encBitClr(unsigned char regNo, unsigned char data) { char dout[2]; spi_lock(); enc_cfg_spi(); dout[0] = 0xa0 | regNo; /* Bit field clear */ dout[1] = data; spi_txrx(dout, 2, 0, 0, SPI_START | SPI_STOP); spi_unlock(); } static void encReset(void) { char dout[1]; spi_lock(); enc_cfg_spi(); dout[0] = 0xff; spi_txrx(dout, 1, 0, 0, SPI_START | SPI_STOP); spi_unlock(); /* sleep 1 ms. See errata pt. 2 */ udelay(1000); } #ifndef CONFIG_ETHADDR #include void enc_set_mac_addr(void) { if (NULL == getenv("ethaddr")) { uchar reg[8]; uchar addr[8]; uchar nid[20]; ulong *s; /*set this bit to open the OTP banks for reading*/ REG_SET(OCOTP_BASE + OCOTP_CTRL, CTRL_RD_BANK_OPEN); /*wait until OTP contents are readable*/ while (CTRL_BUSY & REG_RD(OCOTP_BASE + OCOTP_CTRL)) udelay(100); s = (ulong *)reg; /*read register HW_OCOTP_CUST0*/ *s = REG_RD(OCOTP_BASE + OCOTP_CUST0); addr[3] = reg[0]; addr[2] = reg[1]; addr[1] = reg[2]; addr[0] = reg[3]; s = s + 1; /*read register HW_OCOTP_CUST1*/ *s = REG_RD(OCOTP_BASE + OCOTP_CUST1); addr[5] = reg[4]; addr[4] = reg[5]; /*clear this bit to avoid current drain*/ REG_CLR(OCOTP_BASE + OCOTP_CTRL, CTRL_RD_BANK_OPEN); sprintf(nid, "%02X:%02X:%02X:%02X:%02X:%02X", addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); setenv("ethaddr", nid); } } #endif #endif /* CONFIG_ENC28J60_ETH */