// SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright 2000-2004 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2007 Freescale Semiconductor, Inc. * TsiChung Liew (Tsi-Chung.Liew@freescale.com) */ #include #include #include #include #include #include #include #include #undef ET_DEBUG #undef MII_DEBUG /* Ethernet Transmit and Receive Buffers */ #define DBUF_LENGTH 1520 #define PKT_MAXBUF_SIZE 1518 #define PKT_MINBUF_SIZE 64 #define PKT_MAXBLR_SIZE 1536 #define LAST_PKTBUFSRX PKTBUFSRX - 1 #define BD_ENET_RX_W_E (BD_ENET_RX_WRAP | BD_ENET_RX_EMPTY) #define BD_ENET_TX_RDY_LST (BD_ENET_TX_READY | BD_ENET_TX_LAST) #define FIFO_ERRSTAT (FIFO_STAT_RXW | FIFO_STAT_UF | FIFO_STAT_OF) /* RxBD bits definitions */ #define BD_ENET_RX_ERR (BD_ENET_RX_LG | BD_ENET_RX_NO | BD_ENET_RX_CR | \ BD_ENET_RX_OV | BD_ENET_RX_TR) #include #include #include "MCD_dma.h" struct fec_info_dma fec_info[] = { #ifdef CONFIG_SYS_FEC0_IOBASE { 0, /* index */ CONFIG_SYS_FEC0_IOBASE, /* io base */ CONFIG_SYS_FEC0_PINMUX, /* gpio pin muxing */ CONFIG_SYS_FEC0_MIIBASE, /* mii base */ -1, /* phy_addr */ 0, /* duplex and speed */ 0, /* phy name */ 0, /* phyname init */ 0, /* RX BD */ 0, /* TX BD */ 0, /* rx Index */ 0, /* tx Index */ 0, /* tx buffer */ 0, /* initialized flag */ (struct fec_info_dma *)-1, /* next */ FEC0_RX_TASK, /* rxTask */ FEC0_TX_TASK, /* txTask */ FEC0_RX_PRIORITY, /* rxPri */ FEC0_TX_PRIORITY, /* txPri */ FEC0_RX_INIT, /* rxInit */ FEC0_TX_INIT, /* txInit */ 0, /* usedTbdIndex */ 0, /* cleanTbdNum */ }, #endif #ifdef CONFIG_SYS_FEC1_IOBASE { 1, /* index */ CONFIG_SYS_FEC1_IOBASE, /* io base */ CONFIG_SYS_FEC1_PINMUX, /* gpio pin muxing */ CONFIG_SYS_FEC1_MIIBASE, /* mii base */ -1, /* phy_addr */ 0, /* duplex and speed */ 0, /* phy name */ 0, /* phy name init */ #ifdef CONFIG_SYS_DMA_USE_INTSRAM (cbd_t *)DBUF_LENGTH, /* RX BD */ #else 0, /* RX BD */ #endif 0, /* TX BD */ 0, /* rx Index */ 0, /* tx Index */ 0, /* tx buffer */ 0, /* initialized flag */ (struct fec_info_dma *)-1, /* next */ FEC1_RX_TASK, /* rxTask */ FEC1_TX_TASK, /* txTask */ FEC1_RX_PRIORITY, /* rxPri */ FEC1_TX_PRIORITY, /* txPri */ FEC1_RX_INIT, /* rxInit */ FEC1_TX_INIT, /* txInit */ 0, /* usedTbdIndex */ 0, /* cleanTbdNum */ } #endif }; static int fec_send(struct eth_device *dev, 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); #ifdef ET_DEBUG static void dbg_fec_regs(struct eth_device *dev) { struct fec_info_dma *info = dev->priv; volatile fecdma_t *fecp = (fecdma_t *) (info->iobase); printf("=====\n"); printf("ievent %x - %x\n", (int)&fecp->eir, fecp->eir); printf("imask %x - %x\n", (int)&fecp->eimr, fecp->eimr); printf("ecntrl %x - %x\n", (int)&fecp->ecr, fecp->ecr); printf("mii_mframe %x - %x\n", (int)&fecp->mmfr, fecp->mmfr); printf("mii_speed %x - %x\n", (int)&fecp->mscr, fecp->mscr); printf("mii_ctrlstat %x - %x\n", (int)&fecp->mibc, fecp->mibc); printf("r_cntrl %x - %x\n", (int)&fecp->rcr, fecp->rcr); printf("r hash %x - %x\n", (int)&fecp->rhr, fecp->rhr); printf("x_cntrl %x - %x\n", (int)&fecp->tcr, fecp->tcr); printf("padr_l %x - %x\n", (int)&fecp->palr, fecp->palr); printf("padr_u %x - %x\n", (int)&fecp->paur, fecp->paur); printf("op_pause %x - %x\n", (int)&fecp->opd, fecp->opd); printf("iadr_u %x - %x\n", (int)&fecp->iaur, fecp->iaur); printf("iadr_l %x - %x\n", (int)&fecp->ialr, fecp->ialr); printf("gadr_u %x - %x\n", (int)&fecp->gaur, fecp->gaur); printf("gadr_l %x - %x\n", (int)&fecp->galr, fecp->galr); printf("x_wmrk %x - %x\n", (int)&fecp->tfwr, fecp->tfwr); printf("r_fdata %x - %x\n", (int)&fecp->rfdr, fecp->rfdr); printf("r_fstat %x - %x\n", (int)&fecp->rfsr, fecp->rfsr); printf("r_fctrl %x - %x\n", (int)&fecp->rfcr, fecp->rfcr); printf("r_flrfp %x - %x\n", (int)&fecp->rlrfp, fecp->rlrfp); printf("r_flwfp %x - %x\n", (int)&fecp->rlwfp, fecp->rlwfp); printf("r_frfar %x - %x\n", (int)&fecp->rfar, fecp->rfar); printf("r_frfrp %x - %x\n", (int)&fecp->rfrp, fecp->rfrp); printf("r_frfwp %x - %x\n", (int)&fecp->rfwp, fecp->rfwp); printf("t_fdata %x - %x\n", (int)&fecp->tfdr, fecp->tfdr); printf("t_fstat %x - %x\n", (int)&fecp->tfsr, fecp->tfsr); printf("t_fctrl %x - %x\n", (int)&fecp->tfcr, fecp->tfcr); printf("t_flrfp %x - %x\n", (int)&fecp->tlrfp, fecp->tlrfp); printf("t_flwfp %x - %x\n", (int)&fecp->tlwfp, fecp->tlwfp); printf("t_ftfar %x - %x\n", (int)&fecp->tfar, fecp->tfar); printf("t_ftfrp %x - %x\n", (int)&fecp->tfrp, fecp->tfrp); printf("t_ftfwp %x - %x\n", (int)&fecp->tfwp, fecp->tfwp); printf("frst %x - %x\n", (int)&fecp->frst, fecp->frst); printf("ctcwr %x - %x\n", (int)&fecp->ctcwr, fecp->ctcwr); } #endif static void set_fec_duplex_speed(volatile fecdma_t * fecp, bd_t * bd, int dup_spd) { if ((dup_spd >> 16) == FULL) { /* Set maximum frame length */ fecp->rcr = FEC_RCR_MAX_FL(PKT_MAXBUF_SIZE) | FEC_RCR_MII_MODE | FEC_RCR_PROM | 0x100; fecp->tcr = FEC_TCR_FDEN; } else { /* Half duplex mode */ fecp->rcr = FEC_RCR_MAX_FL(PKT_MAXBUF_SIZE) | FEC_RCR_MII_MODE | FEC_RCR_DRT; fecp->tcr &= ~FEC_TCR_FDEN; } if ((dup_spd & 0xFFFF) == _100BASET) { #ifdef MII_DEBUG printf("100Mbps\n"); #endif bd->bi_ethspeed = 100; } else { #ifdef MII_DEBUG printf("10Mbps\n"); #endif bd->bi_ethspeed = 10; } } static int fec_send(struct eth_device *dev, void *packet, int length) { struct fec_info_dma *info = dev->priv; cbd_t *pTbd, *pUsedTbd; u16 phyStatus; miiphy_read(dev->name, info->phy_addr, MII_BMSR, &phyStatus); /* process all the consumed TBDs */ while (info->cleanTbdNum < CONFIG_SYS_TX_ETH_BUFFER) { pUsedTbd = &info->txbd[info->usedTbdIdx]; if (pUsedTbd->cbd_sc & BD_ENET_TX_READY) { #ifdef ET_DEBUG printf("Cannot clean TBD %d, in use\n", info->cleanTbdNum); #endif return 0; } /* clean this buffer descriptor */ if (info->usedTbdIdx == (CONFIG_SYS_TX_ETH_BUFFER - 1)) pUsedTbd->cbd_sc = BD_ENET_TX_WRAP; else pUsedTbd->cbd_sc = 0; /* update some indeces for a correct handling of the TBD ring */ info->cleanTbdNum++; info->usedTbdIdx = (info->usedTbdIdx + 1) % CONFIG_SYS_TX_ETH_BUFFER; } /* Check for valid length of data. */ if ((length > 1500) || (length <= 0)) { return -1; } /* Check the number of vacant TxBDs. */ if (info->cleanTbdNum < 1) { printf("No available TxBDs ...\n"); return -1; } /* Get the first TxBD to send the mac header */ pTbd = &info->txbd[info->txIdx]; pTbd->cbd_datlen = length; pTbd->cbd_bufaddr = (u32) packet; pTbd->cbd_sc |= BD_ENET_TX_LAST | BD_ENET_TX_TC | BD_ENET_TX_READY; info->txIdx = (info->txIdx + 1) % CONFIG_SYS_TX_ETH_BUFFER; /* Enable DMA transmit task */ MCD_continDma(info->txTask); info->cleanTbdNum -= 1; /* wait until frame is sent . */ while (pTbd->cbd_sc & BD_ENET_TX_READY) { udelay(10); } return (int)(info->txbd[info->txIdx].cbd_sc & BD_ENET_TX_STATS); } static int fec_recv(struct eth_device *dev) { struct fec_info_dma *info = dev->priv; volatile fecdma_t *fecp = (fecdma_t *) (info->iobase); cbd_t *prbd = &info->rxbd[info->rxIdx]; u32 ievent; int frame_length, len = 0; /* Check if any critical events have happened */ ievent = fecp->eir; if (ievent != 0) { fecp->eir = ievent; if (ievent & (FEC_EIR_BABT | FEC_EIR_TXERR | FEC_EIR_RXERR)) { printf("fec_recv: error\n"); fec_halt(dev); fec_init(dev, NULL); return 0; } if (ievent & FEC_EIR_HBERR) { /* Heartbeat error */ fecp->tcr |= FEC_TCR_GTS; } if (ievent & FEC_EIR_GRA) { /* Graceful stop complete */ if (fecp->tcr & FEC_TCR_GTS) { printf("fec_recv: tcr_gts\n"); fec_halt(dev); fecp->tcr &= ~FEC_TCR_GTS; fec_init(dev, NULL); } } } if (!(prbd->cbd_sc & BD_ENET_RX_EMPTY)) { if ((prbd->cbd_sc & BD_ENET_RX_LAST) && !(prbd->cbd_sc & BD_ENET_RX_ERR) && ((prbd->cbd_datlen - 4) > 14)) { /* Get buffer address and size */ frame_length = prbd->cbd_datlen - 4; /* Fill the buffer and pass it to upper layers */ net_process_received_packet((uchar *)prbd->cbd_bufaddr, frame_length); len = frame_length; } /* Reset buffer descriptor as empty */ if ((info->rxIdx) == (PKTBUFSRX - 1)) prbd->cbd_sc = (BD_ENET_RX_WRAP | BD_ENET_RX_EMPTY); else prbd->cbd_sc = BD_ENET_RX_EMPTY; prbd->cbd_datlen = PKTSIZE_ALIGN; /* Now, we have an empty RxBD, restart the DMA receive task */ MCD_continDma(info->rxTask); /* Increment BD count */ info->rxIdx = (info->rxIdx + 1) % PKTBUFSRX; } return len; } static void fec_set_hwaddr(volatile fecdma_t * fecp, u8 * mac) { u8 currByte; /* byte for which to compute the CRC */ int byte; /* loop - counter */ int bit; /* loop - counter */ u32 crc = 0xffffffff; /* initial value */ for (byte = 0; byte < 6; byte++) { currByte = mac[byte]; for (bit = 0; bit < 8; bit++) { if ((currByte & 0x01) ^ (crc & 0x01)) { crc >>= 1; crc = crc ^ 0xedb88320; } else { crc >>= 1; } currByte >>= 1; } } crc = crc >> 26; /* Set individual hash table register */ if (crc >= 32) { fecp->ialr = (1 << (crc - 32)); fecp->iaur = 0; } else { fecp->ialr = 0; fecp->iaur = (1 << crc); } /* Set physical address */ fecp->palr = (mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3]; fecp->paur = (mac[4] << 24) + (mac[5] << 16) + 0x8808; /* Clear multicast address hash table */ fecp->gaur = 0; fecp->galr = 0; } static int fec_init(struct eth_device *dev, bd_t * bd) { struct fec_info_dma *info = dev->priv; volatile fecdma_t *fecp = (fecdma_t *) (info->iobase); int i; uchar enetaddr[6]; #ifdef ET_DEBUG printf("fec_init: iobase 0x%08x ...\n", info->iobase); #endif fecpin_setclear(dev, 1); fec_halt(dev); #if defined(CONFIG_CMD_MII) || defined (CONFIG_MII) || \ defined (CONFIG_SYS_DISCOVER_PHY) mii_init(); set_fec_duplex_speed(fecp, bd, info->dup_spd); #else #ifndef CONFIG_SYS_DISCOVER_PHY set_fec_duplex_speed(fecp, bd, (FECDUPLEX << 16) | FECSPEED); #endif /* ifndef CONFIG_SYS_DISCOVER_PHY */ #endif /* CONFIG_CMD_MII || CONFIG_MII */ /* We use strictly polling mode only */ fecp->eimr = 0; /* Clear any pending interrupt */ fecp->eir = 0xffffffff; /* Set station address */ if ((u32) fecp == CONFIG_SYS_FEC0_IOBASE) eth_env_get_enetaddr("ethaddr", enetaddr); else eth_env_get_enetaddr("eth1addr", enetaddr); fec_set_hwaddr(fecp, enetaddr); /* Set Opcode/Pause Duration Register */ fecp->opd = 0x00010020; /* Setup Buffers and Buffer Descriptors */ info->rxIdx = 0; info->txIdx = 0; /* Setup Receiver Buffer Descriptors (13.14.24.18) * Settings: Empty, Wrap */ for (i = 0; i < PKTBUFSRX; i++) { info->rxbd[i].cbd_sc = BD_ENET_RX_EMPTY; info->rxbd[i].cbd_datlen = PKTSIZE_ALIGN; info->rxbd[i].cbd_bufaddr = (uint) net_rx_packets[i]; } info->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 < CONFIG_SYS_TX_ETH_BUFFER; i++) { info->txbd[i].cbd_sc = 0; info->txbd[i].cbd_datlen = 0; info->txbd[i].cbd_bufaddr = (uint) (&info->txbuf[0]); } info->txbd[CONFIG_SYS_TX_ETH_BUFFER - 1].cbd_sc |= BD_ENET_TX_WRAP; info->usedTbdIdx = 0; info->cleanTbdNum = CONFIG_SYS_TX_ETH_BUFFER; /* Set Rx FIFO alarm and granularity value */ fecp->rfcr = 0x0c000000; fecp->rfar = 0x0000030c; /* Set Tx FIFO granularity value */ fecp->tfcr = FIFO_CTRL_FRAME | FIFO_CTRL_GR(6) | 0x00040000; fecp->tfar = 0x00000080; fecp->tfwr = 0x2; fecp->ctcwr = 0x03000000; /* Enable DMA receive task */ MCD_startDma(info->rxTask, /* Dma channel */ (s8 *) info->rxbd, /*Source Address */ 0, /* Source increment */ (s8 *) (&fecp->rfdr), /* dest */ 4, /* dest increment */ 0, /* DMA size */ 4, /* xfer size */ info->rxInit, /* initiator */ info->rxPri, /* priority */ (MCD_FECRX_DMA | MCD_TT_FLAGS_DEF), /* Flags */ (MCD_NO_CSUM | MCD_NO_BYTE_SWAP) /* Function description */ ); /* Enable DMA tx task with no ready buffer descriptors */ MCD_startDma(info->txTask, /* Dma channel */ (s8 *) info->txbd, /*Source Address */ 0, /* Source increment */ (s8 *) (&fecp->tfdr), /* dest */ 4, /* dest incr */ 0, /* DMA size */ 4, /* xfer size */ info->txInit, /* initiator */ info->txPri, /* priority */ (MCD_FECTX_DMA | MCD_TT_FLAGS_DEF), /* Flags */ (MCD_NO_CSUM | MCD_NO_BYTE_SWAP) /* Function description */ ); /* Now enable the transmit and receive processing */ fecp->ecr |= FEC_ECR_ETHER_EN; return 1; } static void fec_halt(struct eth_device *dev) { struct fec_info_dma *info = dev->priv; volatile fecdma_t *fecp = (fecdma_t *) (info->iobase); int counter = 0xffff; /* issue graceful stop command to the FEC transmitter if necessary */ fecp->tcr |= FEC_TCR_GTS; /* wait for graceful stop to register */ while ((counter--) && (!(fecp->eir & FEC_EIR_GRA))) ; /* Disable DMA tasks */ MCD_killDma(info->txTask); MCD_killDma(info->rxTask); /* Disable the Ethernet Controller */ fecp->ecr &= ~FEC_ECR_ETHER_EN; /* Clear FIFO status registers */ fecp->rfsr &= FIFO_ERRSTAT; fecp->tfsr &= FIFO_ERRSTAT; fecp->frst = 0x01000000; /* Issue a reset command to the FEC chip */ fecp->ecr |= FEC_ECR_RESET; /* wait at least 20 clock cycles */ udelay(10000); #ifdef ET_DEBUG printf("Ethernet task stopped\n"); #endif } int mcdmafec_initialize(bd_t * bis) { struct eth_device *dev; int i; #ifdef CONFIG_SYS_DMA_USE_INTSRAM u32 tmp = CONFIG_SYS_INTSRAM + 0x2000; #endif for (i = 0; i < ARRAY_SIZE(fec_info); i++) { dev = (struct eth_device *)memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof *dev); if (dev == NULL) hang(); memset(dev, 0, sizeof(*dev)); sprintf(dev->name, "FEC%d", fec_info[i].index); dev->priv = &fec_info[i]; dev->init = fec_init; dev->halt = fec_halt; dev->send = fec_send; dev->recv = fec_recv; /* setup Receive and Transmit buffer descriptor */ #ifdef CONFIG_SYS_DMA_USE_INTSRAM fec_info[i].rxbd = (cbd_t *)((u32)fec_info[i].rxbd + tmp); tmp = (u32)fec_info[i].rxbd; fec_info[i].txbd = (cbd_t *)((u32)fec_info[i].txbd + tmp + (PKTBUFSRX * sizeof(cbd_t))); tmp = (u32)fec_info[i].txbd; fec_info[i].txbuf = (char *)((u32)fec_info[i].txbuf + tmp + (CONFIG_SYS_TX_ETH_BUFFER * sizeof(cbd_t))); tmp = (u32)fec_info[i].txbuf; #else fec_info[i].rxbd = (cbd_t *) memalign(CONFIG_SYS_CACHELINE_SIZE, (PKTBUFSRX * sizeof(cbd_t))); fec_info[i].txbd = (cbd_t *) memalign(CONFIG_SYS_CACHELINE_SIZE, (CONFIG_SYS_TX_ETH_BUFFER * sizeof(cbd_t))); fec_info[i].txbuf = (char *)memalign(CONFIG_SYS_CACHELINE_SIZE, DBUF_LENGTH); #endif #ifdef ET_DEBUG printf("rxbd %x txbd %x\n", (int)fec_info[i].rxbd, (int)fec_info[i].txbd); #endif fec_info[i].phy_name = (char *)memalign(CONFIG_SYS_CACHELINE_SIZE, 32); eth_register(dev); #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) int retval; struct mii_dev *mdiodev = mdio_alloc(); if (!mdiodev) return -ENOMEM; strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN); mdiodev->read = mcffec_miiphy_read; mdiodev->write = mcffec_miiphy_write; retval = mdio_register(mdiodev); if (retval < 0) return retval; #endif if (i > 0) fec_info[i - 1].next = &fec_info[i]; } fec_info[i - 1].next = &fec_info[0]; /* default speed */ bis->bi_ethspeed = 10; return 0; }