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-rw-r--r--cpu/mpc8xx/fec.c710
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diff --git a/cpu/mpc8xx/fec.c b/cpu/mpc8xx/fec.c
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+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 <common.h>
+#include <malloc.h>
+#include <commproc.h>
+#include <net.h>
+#include <command.h>
+
+#undef ET_DEBUG
+
+#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(FEC_ENET)
+
+#ifdef CFG_DISCOVER_PHY
+#include <miiphy.h>
+static void mii_discover_phy(void);
+#endif
+
+/* Ethernet Transmit and Receive Buffers */
+#define DBUF_LENGTH 1520
+
+#define TX_BUF_CNT 2
+
+#define TOUT_LOOP 100
+
+#define PKT_MAXBUF_SIZE 1518
+#define PKT_MINBUF_SIZE 64
+#define PKT_MAXBLR_SIZE 1520
+
+
+static char txbuf[DBUF_LENGTH];
+
+static uint rxIdx; /* index of the current RX buffer */
+static uint txIdx; /* index of the current TX buffer */
+
+/*
+ * FEC Ethernet Tx and Rx buffer descriptors allocated at the
+ * immr->udata_bd address on Dual-Port RAM
+ * Provide for Double Buffering
+ */
+
+typedef volatile struct CommonBufferDescriptor {
+ cbd_t rxbd[PKTBUFSRX]; /* Rx BD */
+ cbd_t txbd[TX_BUF_CNT]; /* Tx BD */
+} RTXBD;
+
+static RTXBD *rtx = NULL;
+
+static int fec_send(struct eth_device* dev, volatile void *packet, int length);
+static int fec_recv(struct eth_device* dev);
+static int fec_init(struct eth_device* dev, bd_t * bd);
+static void fec_halt(struct eth_device* dev);
+
+int fec_initialize(bd_t *bis)
+{
+ struct eth_device* dev;
+
+ dev = (struct eth_device*) malloc(sizeof *dev);
+
+ sprintf(dev->name, "FEC ETHERNET");
+ dev->iobase = 0;
+ dev->priv = 0;
+ dev->init = fec_init;
+ dev->halt = fec_halt;
+ dev->send = fec_send;
+ dev->recv = fec_recv;
+
+ eth_register(dev);
+
+ return 1;
+}
+
+static int fec_send(struct eth_device* dev, volatile void *packet, int length)
+{
+ int j, rc;
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+ volatile fec_t *fecp = &(immr->im_cpm.cp_fec);
+
+ /* section 16.9.23.3
+ * Wait for ready
+ */
+ j = 0;
+ while ((rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) && (j<TOUT_LOOP)) {
+ udelay(1);
+ j++;
+ }
+ if (j>=TOUT_LOOP) {
+ printf("TX not ready\n");
+ }
+
+ rtx->txbd[txIdx].cbd_bufaddr = (uint)packet;
+ rtx->txbd[txIdx].cbd_datlen = length;
+ rtx->txbd[txIdx].cbd_sc |= BD_ENET_TX_READY | BD_ENET_TX_LAST;
+ __asm__ ("eieio");
+
+ /* Activate transmit Buffer Descriptor polling */
+ fecp->fec_x_des_active = 0x01000000; /* Descriptor polling active */
+
+ j = 0;
+ while ((rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) && (j<TOUT_LOOP)) {
+#if defined(CONFIG_ICU862)
+ udelay(10);
+#else
+ udelay(1);
+#endif
+ j++;
+ }
+ if (j>=TOUT_LOOP) {
+ printf("TX timeout\n");
+ }
+#ifdef ET_DEBUG
+ printf("%s[%d] %s: cycles: %d status: %x retry cnt: %d\n",
+ __FILE__,__LINE__,__FUNCTION__,j,rtx->txbd[txIdx].cbd_sc,
+ (rtx->txbd[txIdx].cbd_sc & 0x003C)>>2);
+#endif
+ /* return only status bits */;
+ rc = (rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_STATS);
+
+ txIdx = (txIdx + 1) % TX_BUF_CNT;
+
+ return rc;
+}
+
+static int fec_recv(struct eth_device* dev)
+{
+ int length;
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+ volatile fec_t *fecp = &(immr->im_cpm.cp_fec);
+
+ for (;;) {
+ /* section 16.9.23.2 */
+ if (rtx->rxbd[rxIdx].cbd_sc & BD_ENET_RX_EMPTY) {
+ length = -1;
+ break; /* nothing received - leave for() loop */
+ }
+
+ length = rtx->rxbd[rxIdx].cbd_datlen;
+
+ if (rtx->rxbd[rxIdx].cbd_sc & 0x003f) {
+#ifdef ET_DEBUG
+ printf("%s[%d] err: %x\n",
+ __FUNCTION__,__LINE__,rtx->rxbd[rxIdx].cbd_sc);
+#endif
+ } else {
+ /* Pass the packet up to the protocol layers. */
+ NetReceive(NetRxPackets[rxIdx], length - 4);
+ }
+
+ /* Give the buffer back to the FEC. */
+ rtx->rxbd[rxIdx].cbd_datlen = 0;
+
+ /* wrap around buffer index when necessary */
+ if ((rxIdx + 1) >= PKTBUFSRX) {
+ rtx->rxbd[PKTBUFSRX - 1].cbd_sc = (BD_ENET_RX_WRAP | BD_ENET_RX_EMPTY);
+ rxIdx = 0;
+ } else {
+ rtx->rxbd[rxIdx].cbd_sc = BD_ENET_RX_EMPTY;
+ rxIdx++;
+ }
+
+ __asm__ ("eieio");
+
+ /* Try to fill Buffer Descriptors */
+ fecp->fec_r_des_active = 0x01000000; /* Descriptor polling active */
+ }
+
+ return length;
+}
+
+/**************************************************************
+ *
+ * FEC Ethernet Initialization Routine
+ *
+ *************************************************************/
+
+#define FEC_ECNTRL_PINMUX 0x00000004
+#define FEC_ECNTRL_ETHER_EN 0x00000002
+#define FEC_ECNTRL_RESET 0x00000001
+
+#define FEC_RCNTRL_BC_REJ 0x00000010
+#define FEC_RCNTRL_PROM 0x00000008
+#define FEC_RCNTRL_MII_MODE 0x00000004
+#define FEC_RCNTRL_DRT 0x00000002
+#define FEC_RCNTRL_LOOP 0x00000001
+
+#define FEC_TCNTRL_FDEN 0x00000004
+#define FEC_TCNTRL_HBC 0x00000002
+#define FEC_TCNTRL_GTS 0x00000001
+
+#define FEC_RESET_DELAY 50
+
+static int fec_init(struct eth_device* dev, bd_t * bd)
+{
+
+ int i;
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+ volatile fec_t *fecp = &(immr->im_cpm.cp_fec);
+
+#if defined(CONFIG_FADS) && defined(CONFIG_MPC860T)
+ /* configure FADS for fast (FEC) ethernet, half-duplex */
+ /* The LXT970 needs about 50ms to recover from reset, so
+ * wait for it by discovering the PHY before leaving eth_init().
+ */
+ {
+ volatile uint *bcsr4 = (volatile uint *) BCSR4;
+ *bcsr4 = (*bcsr4 & ~(BCSR4_FETH_EN | BCSR4_FETHCFG1))
+ | (BCSR4_FETHCFG0 | BCSR4_FETHFDE | BCSR4_FETHRST);
+
+ /* reset the LXT970 PHY */
+ *bcsr4 &= ~BCSR4_FETHRST;
+ udelay (10);
+ *bcsr4 |= BCSR4_FETHRST;
+ udelay (10);
+ }
+#endif
+ /* Whack a reset.
+ * A delay is required between a reset of the FEC block and
+ * initialization of other FEC registers because the reset takes
+ * some time to complete. If you don't delay, subsequent writes
+ * to FEC registers might get killed by the reset routine which is
+ * still in progress.
+ */
+ fecp->fec_ecntrl = FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET;
+ for (i = 0;
+ (fecp->fec_ecntrl & FEC_ECNTRL_RESET) && (i < FEC_RESET_DELAY);
+ ++i) {
+ udelay (1);
+ }
+ if (i == FEC_RESET_DELAY) {
+ printf ("FEC_RESET_DELAY timeout\n");
+ return 0;
+ }
+
+ /* We use strictly polling mode only
+ */
+ fecp->fec_imask = 0;
+
+ /* Clear any pending interrupt
+ */
+ fecp->fec_ievent = 0xffc0;
+
+ /* No need to set the IVEC register */
+
+ /* Set station address
+ */
+#define ea eth_get_dev()->enetaddr
+ fecp->fec_addr_low = (ea[0] << 24) | (ea[1] << 16) |
+ (ea[2] << 8) | (ea[3] ) ;
+ fecp->fec_addr_high = (ea[4] << 8) | (ea[5] ) ;
+#undef ea
+
+ /* Clear multicast address hash table
+ */
+ fecp->fec_hash_table_high = 0;
+ fecp->fec_hash_table_low = 0;
+
+ /* Set maximum receive buffer size.
+ */
+ fecp->fec_r_buff_size = PKT_MAXBLR_SIZE;
+
+ /* Set maximum frame length
+ */
+ fecp->fec_r_hash = PKT_MAXBUF_SIZE;
+
+ /*
+ * Setup Buffers and Buffer Desriptors
+ */
+ rxIdx = 0;
+ txIdx = 0;
+
+ if (!rtx) {
+#ifdef CFG_ALLOC_DPRAM
+ rtx = (RTXBD *) (immr->im_cpm.cp_dpmem + dpram_alloc_align(sizeof(RTXBD),8));
+#else
+ rtx = (RTXBD *) (immr->im_cpm.cp_dpmem + CPM_FEC_BASE);
+#endif
+ }
+ /*
+ * Setup Receiver Buffer Descriptors (13.14.24.18)
+ * Settings:
+ * Empty, Wrap
+ */
+ for (i = 0; i < PKTBUFSRX; i++) {
+ rtx->rxbd[i].cbd_sc = BD_ENET_RX_EMPTY;
+ rtx->rxbd[i].cbd_datlen = 0; /* Reset */
+ rtx->rxbd[i].cbd_bufaddr = (uint) NetRxPackets[i];
+ }
+ rtx->rxbd[PKTBUFSRX - 1].cbd_sc |= BD_ENET_RX_WRAP;
+
+ /*
+ * Setup Ethernet Transmitter Buffer Descriptors (13.14.24.19)
+ * Settings:
+ * Last, Tx CRC
+ */
+ for (i = 0; i < TX_BUF_CNT; i++) {
+ rtx->txbd[i].cbd_sc = BD_ENET_TX_LAST | BD_ENET_TX_TC;
+ rtx->txbd[i].cbd_datlen = 0; /* Reset */
+ rtx->txbd[i].cbd_bufaddr = (uint) (&txbuf[0]);
+ }
+ rtx->txbd[TX_BUF_CNT - 1].cbd_sc |= BD_ENET_TX_WRAP;
+
+ /* Set receive and transmit descriptor base
+ */
+ fecp->fec_r_des_start = (unsigned int) (&rtx->rxbd[0]);
+ fecp->fec_x_des_start = (unsigned int) (&rtx->txbd[0]);
+
+ /* Enable MII mode
+ */
+#if 0 /* Full duplex mode */
+ fecp->fec_r_cntrl = FEC_RCNTRL_MII_MODE;
+ fecp->fec_x_cntrl = FEC_TCNTRL_FDEN;
+#else /* Half duplex mode */
+ fecp->fec_r_cntrl = FEC_RCNTRL_MII_MODE | FEC_RCNTRL_DRT;
+ fecp->fec_x_cntrl = 0;
+#endif
+
+ /* Enable big endian and don't care about SDMA FC.
+ */
+ fecp->fec_fun_code = 0x78000000;
+
+ /* Set MII speed to 2.5 MHz or slightly below.
+ * According to the MPC860T (Rev. D) Fast ethernet controller user
+ * manual (6.2.14),
+ * the MII management interface clock must be less than or equal
+ * to 2.5 MHz.
+ * This MDC frequency is equal to system clock / (2 * MII_SPEED).
+ * Then MII_SPEED = system_clock / 2 * 2,5 Mhz.
+ */
+ fecp->fec_mii_speed = ((bd->bi_busfreq + 4999999) / 5000000) << 1;
+
+#if !defined(CONFIG_ICU862) && !defined(CONFIG_IAD210)
+ /* Configure all of port D for MII.
+ */
+ immr->im_ioport.iop_pdpar = 0x1fff;
+
+ /* Bits moved from Rev. D onward */
+ if ((get_immr (0) & 0xffff) < 0x0501) {
+ immr->im_ioport.iop_pddir = 0x1c58; /* Pre rev. D */
+ } else {
+ immr->im_ioport.iop_pddir = 0x1fff; /* Rev. D and later */
+ }
+#else
+ /* Configure port A for MII.
+ */
+
+#if defined(CONFIG_ICU862) && defined(CFG_DISCOVER_PHY)
+
+ /* On the ICU862 board the MII-MDC pin is routed to PD8 pin
+ * of CPU, so for this board we need to configure Utopia and
+ * enable PD8 to MII-MDC function */
+ immr->im_ioport.iop_pdpar |= 0x4080;
+#endif
+
+ /* Has Utopia been configured? */
+ if (immr->im_ioport.iop_pdpar & (0x8000 >> 1)) {
+ /*
+ * YES - Use MUXED mode for UTOPIA bus.
+ * This frees Port A for use by MII (see 862UM table 41-6).
+ */
+ immr->im_ioport.utmode &= ~0x80;
+ } else {
+ /*
+ * NO - set SPLIT mode for UTOPIA bus.
+ *
+ * This doesn't really effect UTOPIA (which isn't
+ * enabled anyway) but just tells the 862
+ * to use port A for MII (see 862UM table 41-6).
+ */
+ immr->im_ioport.utmode |= 0x80;
+ }
+#endif /* !defined(CONFIG_ICU862) */
+
+ rxIdx = 0;
+ txIdx = 0;
+
+ /* Now enable the transmit and receive processing
+ */
+ fecp->fec_ecntrl = FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN;
+
+#ifdef CFG_DISCOVER_PHY
+ /* wait for the PHY to wake up after reset
+ */
+ mii_discover_phy();
+#endif
+
+ /* And last, try to fill Rx Buffer Descriptors */
+ fecp->fec_r_des_active = 0x01000000; /* Descriptor polling active */
+
+ return 1;
+}
+
+
+
+static void fec_halt(struct eth_device* dev)
+{
+#if 0
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
+#endif
+}
+
+#if 0
+void restart(void)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+ immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
+}
+#endif
+
+#if defined(CFG_DISCOVER_PHY) || (CONFIG_COMMANDS & CFG_CMD_MII)
+
+static int phyaddr = -1; /* didn't find a PHY yet */
+static uint phytype;
+
+/* Make MII read/write commands for the FEC.
+*/
+
+#define mk_mii_read(ADDR, REG) (0x60020000 | ((ADDR << 23) | \
+ (REG & 0x1f) << 18))
+
+#define mk_mii_write(ADDR, REG, VAL) (0x50020000 | ((ADDR << 23) | \
+ (REG & 0x1f) << 18) | \
+ (VAL & 0xffff))
+
+/* Interrupt events/masks.
+*/
+#define FEC_ENET_HBERR ((uint)0x80000000) /* Heartbeat error */
+#define FEC_ENET_BABR ((uint)0x40000000) /* Babbling receiver */
+#define FEC_ENET_BABT ((uint)0x20000000) /* Babbling transmitter */
+#define FEC_ENET_GRA ((uint)0x10000000) /* Graceful stop complete */
+#define FEC_ENET_TXF ((uint)0x08000000) /* Full frame transmitted */
+#define FEC_ENET_TXB ((uint)0x04000000) /* A buffer was transmitted */
+#define FEC_ENET_RXF ((uint)0x02000000) /* Full frame received */
+#define FEC_ENET_RXB ((uint)0x01000000) /* A buffer was received */
+#define FEC_ENET_MII ((uint)0x00800000) /* MII interrupt */
+#define FEC_ENET_EBERR ((uint)0x00400000) /* SDMA bus error */
+
+/* PHY identification
+ */
+#define PHY_ID_LXT970 0x78100000 /* LXT970 */
+#define PHY_ID_LXT971 0x001378e0 /* LXT971 and 972 */
+#define PHY_ID_82555 0x02a80150 /* Intel 82555 */
+#define PHY_ID_QS6612 0x01814400 /* QS6612 */
+#define PHY_ID_AMD79C784 0x00225610 /* AMD 79C784 */
+#define PHY_ID_LSI80225 0x0016f870 /* LSI 80225 */
+#define PHY_ID_LSI80225B 0x0016f880 /* LSI 80225/B */
+
+
+/* send command to phy using mii, wait for result */
+static uint
+mii_send(uint mii_cmd)
+{
+ uint mii_reply;
+ volatile fec_t *ep;
+
+ ep = &(((immap_t *)CFG_IMMR)->im_cpm.cp_fec);
+
+ ep->fec_mii_data = mii_cmd; /* command to phy */
+
+ /* wait for mii complete */
+ while (!(ep->fec_ievent & FEC_ENET_MII))
+ ; /* spin until done */
+ mii_reply = ep->fec_mii_data; /* result from phy */
+ ep->fec_ievent = FEC_ENET_MII; /* clear MII complete */
+#if 0
+ printf("%s[%d] %s: sent=0x%8.8x, reply=0x%8.8x\n",
+ __FILE__,__LINE__,__FUNCTION__,mii_cmd,mii_reply);
+#endif
+ return (mii_reply & 0xffff); /* data read from phy */
+}
+#endif /* CFG_DISCOVER_PHY || (CONFIG_COMMANDS & CFG_CMD_MII) */
+
+#if defined(CFG_DISCOVER_PHY)
+static void
+mii_discover_phy(void)
+{
+#define MAX_PHY_PASSES 11
+ uint phyno;
+ int pass;
+
+ phyaddr = -1; /* didn't find a PHY yet */
+ for (pass = 1; pass <= MAX_PHY_PASSES && phyaddr < 0; ++pass) {
+ if (pass > 1) {
+ /* PHY may need more time to recover from reset.
+ * The LXT970 needs 50ms typical, no maximum is
+ * specified, so wait 10ms before try again.
+ * With 11 passes this gives it 100ms to wake up.
+ */
+ udelay(10000); /* wait 10ms */
+ }
+ for (phyno = 0; phyno < 32 && phyaddr < 0; ++phyno) {
+ phytype = mii_send(mk_mii_read(phyno, PHY_PHYIDR1));
+#ifdef ET_DEBUG
+ printf("PHY type 0x%x pass %d type ", phytype, pass);
+#endif
+ if (phytype != 0xffff) {
+ phyaddr = phyno;
+ phytype <<= 16;
+ phytype |= mii_send(mk_mii_read(phyno,
+ PHY_PHYIDR2));
+
+#ifdef ET_DEBUG
+ printf("PHY @ 0x%x pass %d type ",phyno,pass);
+ switch (phytype & 0xfffffff0) {
+ case PHY_ID_LXT970:
+ printf("LXT970\n");
+ break;
+ case PHY_ID_LXT971:
+ printf("LXT971\n");
+ break;
+ case PHY_ID_82555:
+ printf("82555\n");
+ break;
+ case PHY_ID_QS6612:
+ printf("QS6612\n");
+ break;
+ case PHY_ID_AMD79C784:
+ printf("AMD79C784\n");
+ break;
+ case PHY_ID_LSI80225B:
+ printf("LSI L80225/B\n");
+ break;
+ default:
+ printf("0x%08x\n", phytype);
+ break;
+ }
+#endif
+ }
+ }
+ }
+ if (phyaddr < 0) {
+ printf("No PHY device found.\n");
+ }
+}
+#endif /* CFG_DISCOVER_PHY */
+
+#if (CONFIG_COMMANDS & CFG_CMD_MII) && !defined(CONFIG_BITBANGMII)
+
+static int mii_init_done = 0;
+
+/****************************************************************************
+ * mii_init -- Initialize the MII for MII command without ethernet
+ * This function is a subset of eth_init
+ ****************************************************************************
+ */
+void mii_init (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+ bd_t *bd = gd->bd;
+
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+ volatile fec_t *fecp = &(immr->im_cpm.cp_fec);
+ int i;
+
+ if (mii_init_done != 0) {
+ return;
+ }
+
+ /* Whack a reset.
+ * A delay is required between a reset of the FEC block and
+ * initialization of other FEC registers because the reset takes
+ * some time to complete. If you don't delay, subsequent writes
+ * to FEC registers might get killed by the reset routine which is
+ * still in progress.
+ */
+
+ fecp->fec_ecntrl = FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET;
+ for (i = 0;
+ (fecp->fec_ecntrl & FEC_ECNTRL_RESET) && (i < FEC_RESET_DELAY);
+ ++i) {
+ udelay (1);
+ }
+ if (i == FEC_RESET_DELAY) {
+ printf ("FEC_RESET_DELAY timeout\n");
+ return;
+ }
+
+ /* We use strictly polling mode only
+ */
+ fecp->fec_imask = 0;
+
+ /* Clear any pending interrupt
+ */
+ fecp->fec_ievent = 0xffc0;
+
+ /* Set MII speed to 2.5 MHz or slightly below.
+ * According to the MPC860T (Rev. D) Fast ethernet controller user
+ * manual (6.2.14),
+ * the MII management interface clock must be less than or equal
+ * to 2.5 MHz.
+ * This MDC frequency is equal to system clock / (2 * MII_SPEED).
+ * Then MII_SPEED = system_clock / 2 * 2,5 Mhz.
+ */
+ fecp->fec_mii_speed = ((bd->bi_busfreq + 4999999) / 5000000) << 1;
+
+#if !defined(CONFIG_ICU862) && !defined(CONFIG_IAD210)
+ /* Configure all of port D for MII.
+ */
+ immr->im_ioport.iop_pdpar = 0x1fff;
+
+ /* Bits moved from Rev. D onward */
+ if ((get_immr (0) & 0xffff) < 0x0501) {
+ immr->im_ioport.iop_pddir = 0x1c58; /* Pre rev. D */
+ } else {
+ immr->im_ioport.iop_pddir = 0x1fff; /* Rev. D and later */
+ }
+#else
+ /* Configure port A for MII.
+ */
+
+#if defined(CONFIG_ICU862)
+
+ /* On the ICU862 board the MII-MDC pin is routed to PD8 pin
+ * of CPU, so for this board we need to configure Utopia and
+ * enable PD8 to MII-MDC function */
+ immr->im_ioport.iop_pdpar |= 0x4080;
+#endif
+
+ /* Has Utopia been configured? */
+ if (immr->im_ioport.iop_pdpar & (0x8000 >> 1)) {
+ /*
+ * YES - Use MUXED mode for UTOPIA bus.
+ * This frees Port A for use by MII (see 862UM table 41-6).
+ */
+ immr->im_ioport.utmode &= ~0x80;
+ } else {
+ /*
+ * NO - set SPLIT mode for UTOPIA bus.
+ *
+ * This doesn't really effect UTOPIA (which isn't
+ * enabled anyway) but just tells the 862
+ * to use port A for MII (see 862UM table 41-6).
+ */
+ immr->im_ioport.utmode |= 0x80;
+ }
+#endif /* !defined(CONFIG_ICU862) */
+ /* Now enable the transmit and receive processing
+ */
+ fecp->fec_ecntrl = FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN;
+
+ mii_init_done = 1;
+}
+/*****************************************************************************
+ * Read and write a MII PHY register, routines used by MII Utilities
+ *
+ * FIXME: These routines are expected to return 0 on success, but mii_send
+ * does _not_ return an error code. Maybe 0xFFFF means error, i.e.
+ * no PHY connected...
+ * For now always return 0.
+ * FIXME: These routines only work after calling eth_init() at least once!
+ * Otherwise they hang in mii_send() !!! Sorry!
+ *****************************************************************************/
+
+int miiphy_read(unsigned char addr, unsigned char reg, unsigned short *value)
+{
+ short rdreg; /* register working value */
+
+#ifdef MII_DEBUG
+ printf ("miiphy_read(0x%x) @ 0x%x = ", reg, addr);
+#endif
+ rdreg = mii_send(mk_mii_read(addr, reg));
+
+ *value = rdreg;
+
+#ifdef MII_DEBUG
+ printf ("0x%04x\n", *value);
+#endif
+
+ return 0;
+}
+
+int miiphy_write(unsigned char addr, unsigned char reg, unsigned short value)
+{
+ short rdreg; /* register working value */
+
+#ifdef MII_DEBUG
+ printf ("miiphy_write(0x%x) @ 0x%x = ", reg, addr);
+#endif
+
+ rdreg = mii_send(mk_mii_write(addr, reg, value));
+
+#ifdef MII_DEBUG
+ printf ("0x%04x\n", value);
+#endif
+
+ return 0;
+}
+#endif /* (CONFIG_COMMANDS & CFG_CMD_MII) && !defined(CONFIG_BITBANGMII)*/
+
+#endif /* CFG_CMD_NET, FEC_ENET */
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 17:14:52 +0000