--- /dev/null
+/*
+ * Faraday FTGMAC100 Ethernet
+ *
+ * (C) Copyright 2009 Faraday Technology
+ * Po-Yu Chuang <ratbert@faraday-tech.com>
+ *
+ * (C) Copyright 2010 Andes Technology
+ * Macpaul Lin <macpaul@andestech.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <config.h>
+#include <common.h>
+#include <malloc.h>
+#include <net.h>
+#include <asm/io.h>
+#include <asm/dma-mapping.h>
+#include <linux/mii.h>
+
+#include "ftgmac100.h"
+
+#define ETH_ZLEN 60
+#define CFG_XBUF_SIZE 1536
+
+/* RBSR - hw default init value is also 0x640 */
+#define RBSR_DEFAULT_VALUE 0x640
+
+/* PKTBUFSTX/PKTBUFSRX must both be power of 2 */
+#define PKTBUFSTX 4 /* must be power of 2 */
+
+struct ftgmac100_data {
+ ulong txdes_dma;
+ struct ftgmac100_txdes *txdes;
+ ulong rxdes_dma;
+ struct ftgmac100_rxdes *rxdes;
+ int tx_index;
+ int rx_index;
+ int phy_addr;
+};
+
+/*
+ * struct mii_bus functions
+ */
+static int ftgmac100_mdiobus_read(struct eth_device *dev, int phy_addr,
+ int regnum)
+{
+ struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
+ int phycr;
+ int i;
+
+ phycr = readl(&ftgmac100->phycr);
+
+ /* preserve MDC cycle threshold */
+ phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
+
+ phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr)
+ | FTGMAC100_PHYCR_REGAD(regnum)
+ | FTGMAC100_PHYCR_MIIRD;
+
+ writel(phycr, &ftgmac100->phycr);
+
+ for (i = 0; i < 10; i++) {
+ phycr = readl(&ftgmac100->phycr);
+
+ if ((phycr & FTGMAC100_PHYCR_MIIRD) == 0) {
+ int data;
+
+ data = readl(&ftgmac100->phydata);
+ return FTGMAC100_PHYDATA_MIIRDATA(data);
+ }
+
+ mdelay(10);
+ }
+
+ debug("mdio read timed out\n");
+ return -1;
+}
+
+static int ftgmac100_mdiobus_write(struct eth_device *dev, int phy_addr,
+ int regnum, u16 value)
+{
+ struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
+ int phycr;
+ int data;
+ int i;
+
+ phycr = readl(&ftgmac100->phycr);
+
+ /* preserve MDC cycle threshold */
+ phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
+
+ phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr)
+ | FTGMAC100_PHYCR_REGAD(regnum)
+ | FTGMAC100_PHYCR_MIIWR;
+
+ data = FTGMAC100_PHYDATA_MIIWDATA(value);
+
+ writel(data, &ftgmac100->phydata);
+ writel(phycr, &ftgmac100->phycr);
+
+ for (i = 0; i < 10; i++) {
+ phycr = readl(&ftgmac100->phycr);
+
+ if ((phycr & FTGMAC100_PHYCR_MIIWR) == 0) {
+ debug("(phycr & FTGMAC100_PHYCR_MIIWR) == 0: " \
+ "phy_addr: %x\n", phy_addr);
+ return 0;
+ }
+
+ mdelay(1);
+ }
+
+ debug("mdio write timed out\n");
+ return -1;
+}
+
+int ftgmac100_phy_read(struct eth_device *dev, int addr, int reg, u16 *value)
+{
+ *value = ftgmac100_mdiobus_read(dev , addr, reg);
+
+ if (*value == -1)
+ return -1;
+
+ return 0;
+}
+
+int ftgmac100_phy_write(struct eth_device *dev, int addr, int reg, u16 value)
+{
+ if (ftgmac100_mdiobus_write(dev, addr, reg, value) == -1)
+ return -1;
+
+ return 0;
+}
+
+static int ftgmac100_phy_reset(struct eth_device *dev)
+{
+ struct ftgmac100_data *priv = dev->priv;
+ int i;
+ u16 status, adv;
+
+ adv = ADVERTISE_CSMA | ADVERTISE_ALL;
+
+ ftgmac100_phy_write(dev, priv->phy_addr, MII_ADVERTISE, adv);
+
+ printf("%s: Starting autonegotiation...\n", dev->name);
+
+ ftgmac100_phy_write(dev, priv->phy_addr,
+ MII_BMCR, (BMCR_ANENABLE | BMCR_ANRESTART));
+
+ for (i = 0; i < 100000 / 100; i++) {
+ ftgmac100_phy_read(dev, priv->phy_addr, MII_BMSR, &status);
+
+ if (status & BMSR_ANEGCOMPLETE)
+ break;
+ mdelay(1);
+ }
+
+ if (status & BMSR_ANEGCOMPLETE) {
+ printf("%s: Autonegotiation complete\n", dev->name);
+ } else {
+ printf("%s: Autonegotiation timed out (status=0x%04x)\n",
+ dev->name, status);
+ return 0;
+ }
+
+ return 1;
+}
+
+static int ftgmac100_phy_init(struct eth_device *dev)
+{
+ struct ftgmac100_data *priv = dev->priv;
+
+ int phy_addr;
+ u16 phy_id, status, adv, lpa, stat_ge;
+ int media, speed, duplex;
+ int i;
+
+ /* Check if the PHY is up to snuff... */
+ for (phy_addr = 0; phy_addr < CONFIG_PHY_MAX_ADDR; phy_addr++) {
+
+ ftgmac100_phy_read(dev, phy_addr, MII_PHYSID1, &phy_id);
+
+ /*
+ * When it is unable to found PHY,
+ * the interface usually return 0xffff or 0x0000
+ */
+ if (phy_id != 0xffff && phy_id != 0x0) {
+ printf("%s: found PHY at 0x%02x\n",
+ dev->name, phy_addr);
+ priv->phy_addr = phy_addr;
+ break;
+ }
+ }
+
+ if (phy_id == 0xffff || phy_id == 0x0) {
+ printf("%s: no PHY present\n", dev->name);
+ return 0;
+ }
+
+ ftgmac100_phy_read(dev, priv->phy_addr, MII_BMSR, &status);
+
+ if (!(status & BMSR_LSTATUS)) {
+ /* Try to re-negotiate if we don't have link already. */
+ ftgmac100_phy_reset(dev);
+
+ for (i = 0; i < 100000 / 100; i++) {
+ ftgmac100_phy_read(dev, priv->phy_addr,
+ MII_BMSR, &status);
+ if (status & BMSR_LSTATUS)
+ break;
+ udelay(100);
+ }
+ }
+
+ if (!(status & BMSR_LSTATUS)) {
+ printf("%s: link down\n", dev->name);
+ return 0;
+ }
+
+#ifdef CONFIG_FTGMAC100_EGIGA
+ /* 1000 Base-T Status Register */
+ ftgmac100_phy_read(dev, priv->phy_addr,
+ MII_STAT1000, &stat_ge);
+
+ speed = (stat_ge & (LPA_1000FULL | LPA_1000HALF)
+ ? 1 : 0);
+
+ duplex = ((stat_ge & LPA_1000FULL)
+ ? 1 : 0);
+
+ if (speed) { /* Speed is 1000 */
+ printf("%s: link up, 1000bps %s-duplex\n",
+ dev->name, duplex ? "full" : "half");
+ return 0;
+ }
+#endif
+
+ ftgmac100_phy_read(dev, priv->phy_addr, MII_ADVERTISE, &adv);
+ ftgmac100_phy_read(dev, priv->phy_addr, MII_LPA, &lpa);
+
+ media = mii_nway_result(lpa & adv);
+ speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? 1 : 0);
+ duplex = (media & ADVERTISE_FULL) ? 1 : 0;
+
+ printf("%s: link up, %sMbps %s-duplex\n",
+ dev->name, speed ? "100" : "10", duplex ? "full" : "half");
+
+ return 1;
+}
+
+static int ftgmac100_update_link_speed(struct eth_device *dev)
+{
+ struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
+ struct ftgmac100_data *priv = dev->priv;
+
+ unsigned short stat_fe;
+ unsigned short stat_ge;
+ unsigned int maccr;
+
+#ifdef CONFIG_FTGMAC100_EGIGA
+ /* 1000 Base-T Status Register */
+ ftgmac100_phy_read(dev, priv->phy_addr, MII_STAT1000, &stat_ge);
+#endif
+
+ ftgmac100_phy_read(dev, priv->phy_addr, MII_BMSR, &stat_fe);
+
+ if (!(stat_fe & BMSR_LSTATUS)) /* link status up? */
+ return 0;
+
+ /* read MAC control register and clear related bits */
+ maccr = readl(&ftgmac100->maccr) &
+ ~(FTGMAC100_MACCR_GIGA_MODE |
+ FTGMAC100_MACCR_FAST_MODE |
+ FTGMAC100_MACCR_FULLDUP);
+
+#ifdef CONFIG_FTGMAC100_EGIGA
+ if (stat_ge & LPA_1000FULL) {
+ /* set gmac for 1000BaseTX and Full Duplex */
+ maccr |= FTGMAC100_MACCR_GIGA_MODE | FTGMAC100_MACCR_FULLDUP;
+ }
+
+ if (stat_ge & LPA_1000HALF) {
+ /* set gmac for 1000BaseTX and Half Duplex */
+ maccr |= FTGMAC100_MACCR_GIGA_MODE;
+ }
+#endif
+
+ if (stat_fe & BMSR_100FULL) {
+ /* set MII for 100BaseTX and Full Duplex */
+ maccr |= FTGMAC100_MACCR_FAST_MODE | FTGMAC100_MACCR_FULLDUP;
+ }
+
+ if (stat_fe & BMSR_10FULL) {
+ /* set MII for 10BaseT and Full Duplex */
+ maccr |= FTGMAC100_MACCR_FULLDUP;
+ }
+
+ if (stat_fe & BMSR_100HALF) {
+ /* set MII for 100BaseTX and Half Duplex */
+ maccr |= FTGMAC100_MACCR_FAST_MODE;
+ }
+
+ if (stat_fe & BMSR_10HALF) {
+ /* set MII for 10BaseT and Half Duplex */
+ /* we have already clear these bits, do nothing */
+ ;
+ }
+
+ /* update MII config into maccr */
+ writel(maccr, &ftgmac100->maccr);
+
+ return 1;
+}
+
+/*
+ * Reset MAC
+ */
+static void ftgmac100_reset(struct eth_device *dev)
+{
+ struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
+
+ debug("%s()\n", __func__);
+
+ writel(FTGMAC100_MACCR_SW_RST, &ftgmac100->maccr);
+
+ while (readl(&ftgmac100->maccr) & FTGMAC100_MACCR_SW_RST)
+ ;
+}
+
+/*
+ * Set MAC address
+ */
+static void ftgmac100_set_mac(struct eth_device *dev,
+ const unsigned char *mac)
+{
+ struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
+ unsigned int maddr = mac[0] << 8 | mac[1];
+ unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
+
+ debug("%s(%x %x)\n", __func__, maddr, laddr);
+
+ writel(maddr, &ftgmac100->mac_madr);
+ writel(laddr, &ftgmac100->mac_ladr);
+}
+
+static void ftgmac100_set_mac_from_env(struct eth_device *dev)
+{
+ eth_getenv_enetaddr("ethaddr", dev->enetaddr);
+
+ ftgmac100_set_mac(dev, dev->enetaddr);
+}
+
+/*
+ * disable transmitter, receiver
+ */
+static void ftgmac100_halt(struct eth_device *dev)
+{
+ struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
+
+ debug("%s()\n", __func__);
+
+ writel(0, &ftgmac100->maccr);
+}
+
+static int ftgmac100_init(struct eth_device *dev, bd_t *bd)
+{
+ struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
+ struct ftgmac100_data *priv = dev->priv;
+ struct ftgmac100_txdes *txdes;
+ struct ftgmac100_rxdes *rxdes;
+ unsigned int maccr;
+ void *buf;
+ int i;
+
+ debug("%s()\n", __func__);
+
+ if (!priv->txdes) {
+ txdes = dma_alloc_coherent(
+ sizeof(*txdes) * PKTBUFSTX, &priv->txdes_dma);
+ if (!txdes)
+ panic("ftgmac100: out of memory\n");
+ memset(txdes, 0, sizeof(*txdes) * PKTBUFSTX);
+ priv->txdes = txdes;
+ }
+ txdes = priv->txdes;
+
+ if (!priv->rxdes) {
+ rxdes = dma_alloc_coherent(
+ sizeof(*rxdes) * PKTBUFSRX, &priv->rxdes_dma);
+ if (!rxdes)
+ panic("ftgmac100: out of memory\n");
+ memset(rxdes, 0, sizeof(*rxdes) * PKTBUFSRX);
+ priv->rxdes = rxdes;
+ }
+ rxdes = priv->rxdes;
+
+ /* set the ethernet address */
+ ftgmac100_set_mac_from_env(dev);
+
+ /* disable all interrupts */
+ writel(0, &ftgmac100->ier);
+
+ /* initialize descriptors */
+ priv->tx_index = 0;
+ priv->rx_index = 0;
+
+ txdes[PKTBUFSTX - 1].txdes0 = FTGMAC100_TXDES0_EDOTR;
+ rxdes[PKTBUFSRX - 1].rxdes0 = FTGMAC100_RXDES0_EDORR;
+
+ for (i = 0; i < PKTBUFSTX; i++) {
+ /* TXBUF_BADR */
+ if (!txdes[i].txdes2) {
+ buf = memalign(ARCH_DMA_MINALIGN, CFG_XBUF_SIZE);
+ if (!buf)
+ panic("ftgmac100: out of memory\n");
+ txdes[i].txdes3 = virt_to_phys(buf);
+ txdes[i].txdes2 = (uint)buf;
+ }
+ txdes[i].txdes1 = 0;
+ }
+
+ for (i = 0; i < PKTBUFSRX; i++) {
+ /* RXBUF_BADR */
+ if (!rxdes[i].rxdes2) {
+ buf = NetRxPackets[i];
+ rxdes[i].rxdes3 = virt_to_phys(buf);
+ rxdes[i].rxdes2 = (uint)buf;
+ }
+ rxdes[i].rxdes0 &= ~FTGMAC100_RXDES0_RXPKT_RDY;
+ }
+
+ /* transmit ring */
+ writel(priv->txdes_dma, &ftgmac100->txr_badr);
+
+ /* receive ring */
+ writel(priv->rxdes_dma, &ftgmac100->rxr_badr);
+
+ /* poll receive descriptor automatically */
+ writel(FTGMAC100_APTC_RXPOLL_CNT(1), &ftgmac100->aptc);
+
+ /* config receive buffer size register */
+ writel(FTGMAC100_RBSR_SIZE(RBSR_DEFAULT_VALUE), &ftgmac100->rbsr);
+
+ /* enable transmitter, receiver */
+ maccr = FTGMAC100_MACCR_TXMAC_EN |
+ FTGMAC100_MACCR_RXMAC_EN |
+ FTGMAC100_MACCR_TXDMA_EN |
+ FTGMAC100_MACCR_RXDMA_EN |
+ FTGMAC100_MACCR_CRC_APD |
+ FTGMAC100_MACCR_FULLDUP |
+ FTGMAC100_MACCR_RX_RUNT |
+ FTGMAC100_MACCR_RX_BROADPKT;
+
+ writel(maccr, &ftgmac100->maccr);
+
+ if (!ftgmac100_phy_init(dev)) {
+ if (!ftgmac100_update_link_speed(dev))
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * Get a data block via Ethernet
+ */
+static int ftgmac100_recv(struct eth_device *dev)
+{
+ struct ftgmac100_data *priv = dev->priv;
+ struct ftgmac100_rxdes *curr_des;
+ unsigned short rxlen;
+
+ curr_des = &priv->rxdes[priv->rx_index];
+
+ if (!(curr_des->rxdes0 & FTGMAC100_RXDES0_RXPKT_RDY))
+ return -1;
+
+ if (curr_des->rxdes0 & (FTGMAC100_RXDES0_RX_ERR |
+ FTGMAC100_RXDES0_CRC_ERR |
+ FTGMAC100_RXDES0_FTL |
+ FTGMAC100_RXDES0_RUNT |
+ FTGMAC100_RXDES0_RX_ODD_NB)) {
+ return -1;
+ }
+
+ rxlen = FTGMAC100_RXDES0_VDBC(curr_des->rxdes0);
+
+ debug("%s(): RX buffer %d, %x received\n",
+ __func__, priv->rx_index, rxlen);
+
+ /* invalidate d-cache */
+ dma_map_single((void *)curr_des->rxdes2, rxlen, DMA_FROM_DEVICE);
+
+ /* pass the packet up to the protocol layers. */
+ NetReceive((void *)curr_des->rxdes2, rxlen);
+
+ /* release buffer to DMA */
+ curr_des->rxdes0 &= ~FTGMAC100_RXDES0_RXPKT_RDY;
+
+ priv->rx_index = (priv->rx_index + 1) % PKTBUFSRX;
+
+ return 0;
+}
+
+/*
+ * Send a data block via Ethernet
+ */
+static int ftgmac100_send(struct eth_device *dev, void *packet, int length)
+{
+ struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
+ struct ftgmac100_data *priv = dev->priv;
+ struct ftgmac100_txdes *curr_des = &priv->txdes[priv->tx_index];
+
+ if (curr_des->txdes0 & FTGMAC100_TXDES0_TXDMA_OWN) {
+ debug("%s(): no TX descriptor available\n", __func__);
+ return -1;
+ }
+
+ debug("%s(%x, %x)\n", __func__, (int)packet, length);
+
+ length = (length < ETH_ZLEN) ? ETH_ZLEN : length;
+
+ memcpy((void *)curr_des->txdes2, (void *)packet, length);
+ dma_map_single((void *)curr_des->txdes2, length, DMA_TO_DEVICE);
+
+ /* only one descriptor on TXBUF */
+ curr_des->txdes0 &= FTGMAC100_TXDES0_EDOTR;
+ curr_des->txdes0 |= FTGMAC100_TXDES0_FTS |
+ FTGMAC100_TXDES0_LTS |
+ FTGMAC100_TXDES0_TXBUF_SIZE(length) |
+ FTGMAC100_TXDES0_TXDMA_OWN ;
+
+ /* start transmit */
+ writel(1, &ftgmac100->txpd);
+
+ debug("%s(): packet sent\n", __func__);
+
+ priv->tx_index = (priv->tx_index + 1) % PKTBUFSTX;
+
+ return 0;
+}
+
+int ftgmac100_initialize(bd_t *bd)
+{
+ struct eth_device *dev;
+ struct ftgmac100_data *priv;
+
+ dev = malloc(sizeof *dev);
+ if (!dev) {
+ printf("%s(): failed to allocate dev\n", __func__);
+ goto out;
+ }
+
+ /* Transmit and receive descriptors should align to 16 bytes */
+ priv = memalign(16, sizeof(struct ftgmac100_data));
+ if (!priv) {
+ printf("%s(): failed to allocate priv\n", __func__);
+ goto free_dev;
+ }
+
+ memset(dev, 0, sizeof(*dev));
+ memset(priv, 0, sizeof(*priv));
+
+ sprintf(dev->name, "FTGMAC100");
+ dev->iobase = CONFIG_FTGMAC100_BASE;
+ dev->init = ftgmac100_init;
+ dev->halt = ftgmac100_halt;
+ dev->send = ftgmac100_send;
+ dev->recv = ftgmac100_recv;
+ dev->priv = priv;
+
+ eth_register(dev);
+
+ ftgmac100_reset(dev);
+
+ return 1;
+
+free_dev:
+ free(dev);
+out:
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff