// 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) * * Conversion to DM * (C) 2019 Angelo Dureghello */ #include #include #include #include #include #include #include #include #include #include #include #include #include "MCD_dma.h" #undef ET_DEBUG #undef MII_DEBUG /* Ethernet Transmit and Receive Buffers */ #define DBUF_LENGTH 1520 #define PKT_MAXBUF_SIZE 1518 #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) DECLARE_GLOBAL_DATA_PTR; static void init_eth_info(struct fec_info_dma *info) { /* setup Receive and Transmit buffer descriptor */ #ifdef CONFIG_SYS_FEC_BUF_USE_SRAM static u32 tmp; if (info->index == 0) tmp = CONFIG_SYS_INIT_RAM_ADDR + 0x1000; else info->rxbd = (cbd_t *)DBUF_LENGTH; info->rxbd = (cbd_t *)((u32)info->rxbd + tmp); tmp = (u32)info->rxbd; info->txbd = (cbd_t *)((u32)info->txbd + tmp + (PKTBUFSRX * sizeof(cbd_t))); tmp = (u32)info->txbd; info->txbuf = (char *)((u32)info->txbuf + tmp + (CONFIG_SYS_TX_ETH_BUFFER * sizeof(cbd_t))); tmp = (u32)info->txbuf; #else info->rxbd = (cbd_t *)memalign(CONFIG_SYS_CACHELINE_SIZE, (PKTBUFSRX * sizeof(cbd_t))); info->txbd = (cbd_t *)memalign(CONFIG_SYS_CACHELINE_SIZE, (CONFIG_SYS_TX_ETH_BUFFER * sizeof(cbd_t))); info->txbuf = (char *)memalign(CONFIG_SYS_CACHELINE_SIZE, DBUF_LENGTH); #endif #ifdef ET_DEBUG printf("rxbd %x txbd %x\n", (int)info->rxbd, (int)info->txbd); #endif info->phy_name = (char *)memalign(CONFIG_SYS_CACHELINE_SIZE, 32); } static void fec_halt(struct udevice *dev) { struct fec_info_dma *info = dev_get_priv(dev); 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->tx_task); MCD_killDma(info->rx_task); /* 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 */ mdelay(10); #ifdef ET_DEBUG printf("Ethernet task stopped\n"); #endif } #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, int dup_spd) { struct bd_info *bd = gd->bd; 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 void fec_set_hwaddr(volatile fecdma_t *fecp, u8 *mac) { u8 curr_byte; /* 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++) { curr_byte = mac[byte]; for (bit = 0; bit < 8; bit++) { if ((curr_byte & 0x01) ^ (crc & 0x01)) { crc >>= 1; crc = crc ^ 0xedb88320; } else { crc >>= 1; } curr_byte >>= 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 udevice *dev) { struct fec_info_dma *info = dev_get_priv(dev); volatile fecdma_t *fecp = (fecdma_t *)info->iobase; int rval, i; uchar enetaddr[6]; #ifdef ET_DEBUG printf("fec_init: iobase 0x%08x ...\n", info->iobase); #endif fecpin_setclear(info, 1); fec_halt(dev); #if defined(CONFIG_CMD_MII) || defined (CONFIG_MII) || \ defined (CONFIG_SYS_DISCOVER_PHY) mii_init(); set_fec_duplex_speed(fecp, info->dup_spd); #else #ifndef CONFIG_SYS_DISCOVER_PHY set_fec_duplex_speed(fecp, (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 (info->index == 0) rval = eth_env_get_enetaddr("ethaddr", enetaddr); else rval = eth_env_get_enetaddr("eth1addr", enetaddr); if (!rval) { puts("Please set a valid MAC address\n"); return -EINVAL; } fec_set_hwaddr(fecp, enetaddr); /* Set Opcode/Pause Duration Register */ fecp->opd = 0x00010020; /* Setup Buffers and Buffer Descriptors */ info->rx_idx = 0; info->tx_idx = 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->used_tbd_idx = 0; info->clean_tbd_num = 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->rx_task, (s8 *)info->rxbd, 0, (s8 *)&fecp->rfdr, 4, 0, 4, info->rx_init, info->rx_pri, (MCD_FECRX_DMA | MCD_TT_FLAGS_DEF), (MCD_NO_CSUM | MCD_NO_BYTE_SWAP) ); /* Enable DMA tx task with no ready buffer descriptors */ MCD_startDma(info->tx_task, (s8 *)info->txbd, 0, (s8 *)&fecp->tfdr, 4, 0, 4, info->tx_init, info->tx_pri, (MCD_FECTX_DMA | MCD_TT_FLAGS_DEF), (MCD_NO_CSUM | MCD_NO_BYTE_SWAP) ); /* Now enable the transmit and receive processing */ fecp->ecr |= FEC_ECR_ETHER_EN; return 0; } static int mcdmafec_init(struct udevice *dev) { return fec_init(dev); } static int mcdmafec_send(struct udevice *dev, void *packet, int length) { struct fec_info_dma *info = dev_get_priv(dev); cbd_t *p_tbd, *p_used_tbd; u16 phy_status; miiphy_read(dev->name, info->phy_addr, MII_BMSR, &phy_status); /* process all the consumed TBDs */ while (info->clean_tbd_num < CONFIG_SYS_TX_ETH_BUFFER) { p_used_tbd = &info->txbd[info->used_tbd_idx]; if (p_used_tbd->cbd_sc & BD_ENET_TX_READY) { #ifdef ET_DEBUG printf("Cannot clean TBD %d, in use\n", info->clean_tbd_num); #endif return 0; } /* clean this buffer descriptor */ if (info->used_tbd_idx == (CONFIG_SYS_TX_ETH_BUFFER - 1)) p_used_tbd->cbd_sc = BD_ENET_TX_WRAP; else p_used_tbd->cbd_sc = 0; /* update some indeces for a correct handling of TBD ring */ info->clean_tbd_num++; info->used_tbd_idx = (info->used_tbd_idx + 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->clean_tbd_num < 1) { printf("No available TxBDs ...\n"); return -1; } /* Get the first TxBD to send the mac header */ p_tbd = &info->txbd[info->tx_idx]; p_tbd->cbd_datlen = length; p_tbd->cbd_bufaddr = (u32)packet; p_tbd->cbd_sc |= BD_ENET_TX_LAST | BD_ENET_TX_TC | BD_ENET_TX_READY; info->tx_idx = (info->tx_idx + 1) % CONFIG_SYS_TX_ETH_BUFFER; /* Enable DMA transmit task */ MCD_continDma(info->tx_task); info->clean_tbd_num -= 1; /* wait until frame is sent . */ while (p_tbd->cbd_sc & BD_ENET_TX_READY) udelay(10); return (int)(info->txbd[info->tx_idx].cbd_sc & BD_ENET_TX_STATS); } static int mcdmafec_recv(struct udevice *dev, int flags, uchar **packetp) { struct fec_info_dma *info = dev_get_priv(dev); volatile fecdma_t *fecp = (fecdma_t *)info->iobase; cbd_t *prbd = &info->rxbd[info->rx_idx]; 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); 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); } } } 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->rx_idx == (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->rx_task); /* Increment BD count */ info->rx_idx = (info->rx_idx + 1) % PKTBUFSRX; } return len; } static void mcdmafec_halt(struct udevice *dev) { fec_halt(dev); } static const struct eth_ops mcdmafec_ops = { .start = mcdmafec_init, .send = mcdmafec_send, .recv = mcdmafec_recv, .stop = mcdmafec_halt, }; /* * Boot sequence, called just after mcffec_of_to_plat, * as DM way, it replaces old mcffec_initialize. */ static int mcdmafec_probe(struct udevice *dev) { struct fec_info_dma *info = dev_get_priv(dev); struct eth_pdata *pdata = dev_get_plat(dev); int node = dev_of_offset(dev); int retval; const u32 *val; info->index = dev_seq(dev); info->iobase = pdata->iobase; info->miibase = pdata->iobase; info->phy_addr = -1; val = fdt_getprop(gd->fdt_blob, node, "rx-task", NULL); if (val) info->rx_task = fdt32_to_cpu(*val); val = fdt_getprop(gd->fdt_blob, node, "tx-task", NULL); if (val) info->tx_task = fdt32_to_cpu(*val); val = fdt_getprop(gd->fdt_blob, node, "rx-prioprity", NULL); if (val) info->rx_pri = fdt32_to_cpu(*val); val = fdt_getprop(gd->fdt_blob, node, "tx-prioprity", NULL); if (val) info->tx_pri = fdt32_to_cpu(*val); val = fdt_getprop(gd->fdt_blob, node, "rx-init", NULL); if (val) info->rx_init = fdt32_to_cpu(*val); val = fdt_getprop(gd->fdt_blob, node, "tx-init", NULL); if (val) info->tx_init = fdt32_to_cpu(*val); #ifdef CONFIG_SYS_FEC_BUF_USE_SRAM u32 tmp = CONFIG_SYS_INIT_RAM_ADDR + 0x1000; #endif init_eth_info(info); #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) info->bus = mdio_alloc(); if (!info->bus) return -ENOMEM; strncpy(info->bus->name, dev->name, MDIO_NAME_LEN); info->bus->read = mcffec_miiphy_read; info->bus->write = mcffec_miiphy_write; retval = mdio_register(info->bus); if (retval < 0) return retval; #endif return 0; } static int mcdmafec_remove(struct udevice *dev) { struct fec_info_dma *priv = dev_get_priv(dev); mdio_unregister(priv->bus); mdio_free(priv->bus); return 0; } /* * Boot sequence, called 1st */ static int mcdmafec_of_to_plat(struct udevice *dev) { struct eth_pdata *pdata = dev_get_plat(dev); const u32 *val; pdata->iobase = dev_read_addr(dev); /* Default to 10Mbit/s */ pdata->max_speed = 10; val = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "max-speed", NULL); if (val) pdata->max_speed = fdt32_to_cpu(*val); return 0; } static const struct udevice_id mcdmafec_ids[] = { { .compatible = "fsl,mcf-dma-fec" }, { } }; U_BOOT_DRIVER(mcffec) = { .name = "mcdmafec", .id = UCLASS_ETH, .of_match = mcdmafec_ids, .of_to_plat = mcdmafec_of_to_plat, .probe = mcdmafec_probe, .remove = mcdmafec_remove, .ops = &mcdmafec_ops, .priv_auto = sizeof(struct fec_info_dma), .plat_auto = sizeof(struct eth_pdata), };