/* * (C) Copyright 2000-2004 * 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 #include #include #ifdef CONFIG_M5272 #include #include #endif #ifdef CONFIG_M5282 #include #include #endif #include #include #ifdef CONFIG_M5272 #define FEC_ADDR (CFG_MBAR + 0x840) #endif #ifdef CONFIG_M5282 #define FEC_ADDR (CFG_MBAR + 0x1000) #endif #undef ET_DEBUG #undef MII_DEBUG #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(FEC_ENET) #ifdef CFG_DISCOVER_PHY #include 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; int eth_send (volatile void *packet, int length) { int j, rc; volatile fec_t *fecp = (fec_t *) (FEC_ADDR); /* 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; /* 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)) { udelay (1); 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; } int eth_rx (void) { int length; volatile fec_t *fecp = (fec_t *) FEC_ADDR; 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++; } /* Try to fill Buffer Descriptors */ fecp->fec_r_des_active = 0x01000000; /* Descriptor polling active */ } return length; } /************************************************************** * * FEC Ethernet Initialization Routine * *************************************************************/ #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 50000 int eth_init (bd_t * bd) { int i; volatile fec_t *fecp = (fec_t *) (FEC_ADDR); /* 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_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 = 0xffffffff; /* Set station address */ #define ea bd->bi_enetaddr fecp->fec_addr_low = (ea[0] << 24) | (ea[1] << 16) | (ea[2] << 8) | (ea[3]); fecp->fec_addr_high = (ea[4] << 24) | (ea[5] << 16); #ifdef ET_DEBUG printf ("Eth Addrs: %02x:%02x:%02x:%02x:%02x:%02x\n", ea[0], ea[1], ea[2], ea[3], ea[4], ea[5]); #endif #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; /* * Setup Buffers and Buffer Desriptors */ rxIdx = 0; txIdx = 0; if (!rtx) { rtx = (RTXBD *) CFG_ENET_BD_BASE; } /* * 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 /* Set MII speed */ fecp->fec_mii_speed = 0x0e; /* Configure port B for MII. */ /* port initialization was already made in cpu_init_f() */ /* Now enable the transmit and receive processing */ fecp->fec_ecntrl = 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; } void eth_halt (void) { volatile fec_t *fecp = (fec_t *) FEC_ADDR; fecp->fec_ecntrl = 0; } #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 = (fec_t *) (FEC_ADDR); 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 */ #ifdef ET_DEBUG 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) { volatile fec_t *fecp = (fec_t *) (FEC_ADDR); 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_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 = 0xffffffff; /* Set MII speed */ fecp->fec_mii_speed = 0x0e; /* Configure port B for MII. */ /* port initialization was already made in cpu_init_f() */ /* Now enable the transmit and receive processing */ fecp->fec_ecntrl = 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 */