--- /dev/null
+/*
+ * (C) Copyright 2010
+ * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ * Designware ethernet IP driver for u-boot
+ */
+
+#include <common.h>
+#include <miiphy.h>
+#include <malloc.h>
+#include <linux/compiler.h>
+#include <linux/err.h>
+#include <asm/io.h>
+#include "designware.h"
+
+#if !defined(CONFIG_PHYLIB)
+# error "DesignWare Ether MAC requires PHYLIB - missing CONFIG_PHYLIB"
+#endif
+
+static int dw_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
+{
+ struct eth_mac_regs *mac_p = bus->priv;
+ ulong start;
+ u16 miiaddr;
+ int timeout = CONFIG_MDIO_TIMEOUT;
+
+ miiaddr = ((addr << MIIADDRSHIFT) & MII_ADDRMSK) |
+ ((reg << MIIREGSHIFT) & MII_REGMSK);
+
+ writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
+
+ start = get_timer(0);
+ while (get_timer(start) < timeout) {
+ if (!(readl(&mac_p->miiaddr) & MII_BUSY))
+ return readl(&mac_p->miidata);
+ udelay(10);
+ };
+
+ return -1;
+}
+
+static int dw_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
+ u16 val)
+{
+ struct eth_mac_regs *mac_p = bus->priv;
+ ulong start;
+ u16 miiaddr;
+ int ret = -1, timeout = CONFIG_MDIO_TIMEOUT;
+
+ writel(val, &mac_p->miidata);
+ miiaddr = ((addr << MIIADDRSHIFT) & MII_ADDRMSK) |
+ ((reg << MIIREGSHIFT) & MII_REGMSK) | MII_WRITE;
+
+ writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
+
+ start = get_timer(0);
+ while (get_timer(start) < timeout) {
+ if (!(readl(&mac_p->miiaddr) & MII_BUSY)) {
+ ret = 0;
+ break;
+ }
+ udelay(10);
+ };
+
+ return ret;
+}
+
+static int dw_mdio_init(char *name, struct eth_mac_regs *mac_regs_p)
+{
+ struct mii_dev *bus = mdio_alloc();
+
+ if (!bus) {
+ printf("Failed to allocate MDIO bus\n");
+ return -1;
+ }
+
+ bus->read = dw_mdio_read;
+ bus->write = dw_mdio_write;
+ sprintf(bus->name, name);
+
+ bus->priv = (void *)mac_regs_p;
+
+ return mdio_register(bus);
+}
+
+static void tx_descs_init(struct eth_device *dev)
+{
+ struct dw_eth_dev *priv = dev->priv;
+ struct eth_dma_regs *dma_p = priv->dma_regs_p;
+ struct dmamacdescr *desc_table_p = &priv->tx_mac_descrtable[0];
+ char *txbuffs = &priv->txbuffs[0];
+ struct dmamacdescr *desc_p;
+ u32 idx;
+
+ for (idx = 0; idx < CONFIG_TX_DESCR_NUM; idx++) {
+ desc_p = &desc_table_p[idx];
+ desc_p->dmamac_addr = &txbuffs[idx * CONFIG_ETH_BUFSIZE];
+ desc_p->dmamac_next = &desc_table_p[idx + 1];
+
+#if defined(CONFIG_DW_ALTDESCRIPTOR)
+ desc_p->txrx_status &= ~(DESC_TXSTS_TXINT | DESC_TXSTS_TXLAST |
+ DESC_TXSTS_TXFIRST | DESC_TXSTS_TXCRCDIS | \
+ DESC_TXSTS_TXCHECKINSCTRL | \
+ DESC_TXSTS_TXRINGEND | DESC_TXSTS_TXPADDIS);
+
+ desc_p->txrx_status |= DESC_TXSTS_TXCHAIN;
+ desc_p->dmamac_cntl = 0;
+ desc_p->txrx_status &= ~(DESC_TXSTS_MSK | DESC_TXSTS_OWNBYDMA);
+#else
+ desc_p->dmamac_cntl = DESC_TXCTRL_TXCHAIN;
+ desc_p->txrx_status = 0;
+#endif
+ }
+
+ /* Correcting the last pointer of the chain */
+ desc_p->dmamac_next = &desc_table_p[0];
+
+ /* Flush all Tx buffer descriptors at once */
+ flush_dcache_range((unsigned int)priv->tx_mac_descrtable,
+ (unsigned int)priv->tx_mac_descrtable +
+ sizeof(priv->tx_mac_descrtable));
+
+ writel((ulong)&desc_table_p[0], &dma_p->txdesclistaddr);
+ priv->tx_currdescnum = 0;
+}
+
+static void rx_descs_init(struct eth_device *dev)
+{
+ struct dw_eth_dev *priv = dev->priv;
+ struct eth_dma_regs *dma_p = priv->dma_regs_p;
+ struct dmamacdescr *desc_table_p = &priv->rx_mac_descrtable[0];
+ char *rxbuffs = &priv->rxbuffs[0];
+ struct dmamacdescr *desc_p;
+ u32 idx;
+
+ /* Before passing buffers to GMAC we need to make sure zeros
+ * written there right after "priv" structure allocation were
+ * flushed into RAM.
+ * Otherwise there's a chance to get some of them flushed in RAM when
+ * GMAC is already pushing data to RAM via DMA. This way incoming from
+ * GMAC data will be corrupted. */
+ flush_dcache_range((unsigned int)rxbuffs, (unsigned int)rxbuffs +
+ RX_TOTAL_BUFSIZE);
+
+ for (idx = 0; idx < CONFIG_RX_DESCR_NUM; idx++) {
+ desc_p = &desc_table_p[idx];
+ desc_p->dmamac_addr = &rxbuffs[idx * CONFIG_ETH_BUFSIZE];
+ desc_p->dmamac_next = &desc_table_p[idx + 1];
+
+ desc_p->dmamac_cntl =
+ (MAC_MAX_FRAME_SZ & DESC_RXCTRL_SIZE1MASK) | \
+ DESC_RXCTRL_RXCHAIN;
+
+ desc_p->txrx_status = DESC_RXSTS_OWNBYDMA;
+ }
+
+ /* Correcting the last pointer of the chain */
+ desc_p->dmamac_next = &desc_table_p[0];
+
+ /* Flush all Rx buffer descriptors at once */
+ flush_dcache_range((unsigned int)priv->rx_mac_descrtable,
+ (unsigned int)priv->rx_mac_descrtable +
+ sizeof(priv->rx_mac_descrtable));
+
+ writel((ulong)&desc_table_p[0], &dma_p->rxdesclistaddr);
+ priv->rx_currdescnum = 0;
+}
+
+static int dw_write_hwaddr(struct eth_device *dev)
+{
+ struct dw_eth_dev *priv = dev->priv;
+ struct eth_mac_regs *mac_p = priv->mac_regs_p;
+ u32 macid_lo, macid_hi;
+ u8 *mac_id = &dev->enetaddr[0];
+
+ macid_lo = mac_id[0] + (mac_id[1] << 8) + (mac_id[2] << 16) +
+ (mac_id[3] << 24);
+ macid_hi = mac_id[4] + (mac_id[5] << 8);
+
+ writel(macid_hi, &mac_p->macaddr0hi);
+ writel(macid_lo, &mac_p->macaddr0lo);
+
+ return 0;
+}
+
+static void dw_adjust_link(struct eth_mac_regs *mac_p,
+ struct phy_device *phydev)
+{
+ u32 conf = readl(&mac_p->conf) | FRAMEBURSTENABLE | DISABLERXOWN;
+
+ if (!phydev->link) {
+ printf("%s: No link.\n", phydev->dev->name);
+ return;
+ }
+
+ if (phydev->speed != 1000)
+ conf |= MII_PORTSELECT;
+
+ if (phydev->speed == 100)
+ conf |= FES_100;
+
+ if (phydev->duplex)
+ conf |= FULLDPLXMODE;
+
+ writel(conf, &mac_p->conf);
+
+ printf("Speed: %d, %s duplex%s\n", phydev->speed,
+ (phydev->duplex) ? "full" : "half",
+ (phydev->port == PORT_FIBRE) ? ", fiber mode" : "");
+}
+
+static void dw_eth_halt(struct eth_device *dev)
+{
+ struct dw_eth_dev *priv = dev->priv;
+ struct eth_mac_regs *mac_p = priv->mac_regs_p;
+ struct eth_dma_regs *dma_p = priv->dma_regs_p;
+
+ writel(readl(&mac_p->conf) & ~(RXENABLE | TXENABLE), &mac_p->conf);
+ writel(readl(&dma_p->opmode) & ~(RXSTART | TXSTART), &dma_p->opmode);
+
+ phy_shutdown(priv->phydev);
+}
+
+static int dw_eth_init(struct eth_device *dev, bd_t *bis)
+{
+ struct dw_eth_dev *priv = dev->priv;
+ struct eth_mac_regs *mac_p = priv->mac_regs_p;
+ struct eth_dma_regs *dma_p = priv->dma_regs_p;
+ unsigned int start;
+
+ writel(readl(&dma_p->busmode) | DMAMAC_SRST, &dma_p->busmode);
+
+ start = get_timer(0);
+ while (readl(&dma_p->busmode) & DMAMAC_SRST) {
+ if (get_timer(start) >= CONFIG_MACRESET_TIMEOUT)
+ return -1;
+
+ mdelay(100);
+ };
+
+ /* Soft reset above clears HW address registers.
+ * So we have to set it here once again */
+ dw_write_hwaddr(dev);
+
+ rx_descs_init(dev);
+ tx_descs_init(dev);
+
+ writel(FIXEDBURST | PRIORXTX_41 | BURST_16, &dma_p->busmode);
+
+ writel(readl(&dma_p->opmode) | FLUSHTXFIFO | STOREFORWARD,
+ &dma_p->opmode);
+
+ writel(readl(&dma_p->opmode) | RXSTART | TXSTART, &dma_p->opmode);
+
+ /* Start up the PHY */
+ if (phy_startup(priv->phydev)) {
+ printf("Could not initialize PHY %s\n",
+ priv->phydev->dev->name);
+ return -1;
+ }
+
+ dw_adjust_link(mac_p, priv->phydev);
+
+ if (!priv->phydev->link)
+ return -1;
+
+ writel(readl(&mac_p->conf) | RXENABLE | TXENABLE, &mac_p->conf);
+
+ return 0;
+}
+
+static int dw_eth_send(struct eth_device *dev, void *packet, int length)
+{
+ struct dw_eth_dev *priv = dev->priv;
+ struct eth_dma_regs *dma_p = priv->dma_regs_p;
+ u32 desc_num = priv->tx_currdescnum;
+ struct dmamacdescr *desc_p = &priv->tx_mac_descrtable[desc_num];
+
+ /* Invalidate only "status" field for the following check */
+ invalidate_dcache_range((unsigned long)&desc_p->txrx_status,
+ (unsigned long)&desc_p->txrx_status +
+ sizeof(desc_p->txrx_status));
+
+ /* Check if the descriptor is owned by CPU */
+ if (desc_p->txrx_status & DESC_TXSTS_OWNBYDMA) {
+ printf("CPU not owner of tx frame\n");
+ return -1;
+ }
+
+ memcpy((void *)desc_p->dmamac_addr, packet, length);
+
+ /* Flush data to be sent */
+ flush_dcache_range((unsigned long)desc_p->dmamac_addr,
+ (unsigned long)desc_p->dmamac_addr + length);
+
+#if defined(CONFIG_DW_ALTDESCRIPTOR)
+ desc_p->txrx_status |= DESC_TXSTS_TXFIRST | DESC_TXSTS_TXLAST;
+ desc_p->dmamac_cntl |= (length << DESC_TXCTRL_SIZE1SHFT) & \
+ DESC_TXCTRL_SIZE1MASK;
+
+ desc_p->txrx_status &= ~(DESC_TXSTS_MSK);
+ desc_p->txrx_status |= DESC_TXSTS_OWNBYDMA;
+#else
+ desc_p->dmamac_cntl |= ((length << DESC_TXCTRL_SIZE1SHFT) & \
+ DESC_TXCTRL_SIZE1MASK) | DESC_TXCTRL_TXLAST | \
+ DESC_TXCTRL_TXFIRST;
+
+ desc_p->txrx_status = DESC_TXSTS_OWNBYDMA;
+#endif
+
+ /* Flush modified buffer descriptor */
+ flush_dcache_range((unsigned long)desc_p,
+ (unsigned long)desc_p + sizeof(struct dmamacdescr));
+
+ /* Test the wrap-around condition. */
+ if (++desc_num >= CONFIG_TX_DESCR_NUM)
+ desc_num = 0;
+
+ priv->tx_currdescnum = desc_num;
+
+ /* Start the transmission */
+ writel(POLL_DATA, &dma_p->txpolldemand);
+
+ return 0;
+}
+
+static int dw_eth_recv(struct eth_device *dev)
+{
+ struct dw_eth_dev *priv = dev->priv;
+ u32 status, desc_num = priv->rx_currdescnum;
+ struct dmamacdescr *desc_p = &priv->rx_mac_descrtable[desc_num];
+ int length = 0;
+
+ /* Invalidate entire buffer descriptor */
+ invalidate_dcache_range((unsigned long)desc_p,
+ (unsigned long)desc_p +
+ sizeof(struct dmamacdescr));
+
+ status = desc_p->txrx_status;
+
+ /* Check if the owner is the CPU */
+ if (!(status & DESC_RXSTS_OWNBYDMA)) {
+
+ length = (status & DESC_RXSTS_FRMLENMSK) >> \
+ DESC_RXSTS_FRMLENSHFT;
+
+ /* Invalidate received data */
+ invalidate_dcache_range((unsigned long)desc_p->dmamac_addr,
+ (unsigned long)desc_p->dmamac_addr +
+ length);
+
+ NetReceive(desc_p->dmamac_addr, length);
+
+ /*
+ * Make the current descriptor valid again and go to
+ * the next one
+ */
+ desc_p->txrx_status |= DESC_RXSTS_OWNBYDMA;
+
+ /* Flush only status field - others weren't changed */
+ flush_dcache_range((unsigned long)&desc_p->txrx_status,
+ (unsigned long)&desc_p->txrx_status +
+ sizeof(desc_p->txrx_status));
+
+ /* Test the wrap-around condition. */
+ if (++desc_num >= CONFIG_RX_DESCR_NUM)
+ desc_num = 0;
+ }
+
+ priv->rx_currdescnum = desc_num;
+
+ return length;
+}
+
+static int dw_phy_init(struct eth_device *dev)
+{
+ struct dw_eth_dev *priv = dev->priv;
+ struct phy_device *phydev;
+ int mask = 0xffffffff;
+
+#ifdef CONFIG_PHY_ADDR
+ mask = 1 << CONFIG_PHY_ADDR;
+#endif
+
+ phydev = phy_find_by_mask(priv->bus, mask, priv->interface);
+ if (!phydev)
+ return -1;
+
+ phy_connect_dev(phydev, dev);
+
+ phydev->supported &= PHY_GBIT_FEATURES;
+ phydev->advertising = phydev->supported;
+
+ priv->phydev = phydev;
+ phy_config(phydev);
+
+ return 1;
+}
+
+int designware_initialize(ulong base_addr, u32 interface)
+{
+ struct eth_device *dev;
+ struct dw_eth_dev *priv;
+
+ dev = (struct eth_device *) malloc(sizeof(struct eth_device));
+ if (!dev)
+ return -ENOMEM;
+
+ /*
+ * Since the priv structure contains the descriptors which need a strict
+ * buswidth alignment, memalign is used to allocate memory
+ */
+ priv = (struct dw_eth_dev *) memalign(16, sizeof(struct dw_eth_dev));
+ if (!priv) {
+ free(dev);
+ return -ENOMEM;
+ }
+
+ memset(dev, 0, sizeof(struct eth_device));
+ memset(priv, 0, sizeof(struct dw_eth_dev));
+
+ sprintf(dev->name, "dwmac.%lx", base_addr);
+ dev->iobase = (int)base_addr;
+ dev->priv = priv;
+
+ priv->dev = dev;
+ priv->mac_regs_p = (struct eth_mac_regs *)base_addr;
+ priv->dma_regs_p = (struct eth_dma_regs *)(base_addr +
+ DW_DMA_BASE_OFFSET);
+
+ dev->init = dw_eth_init;
+ dev->send = dw_eth_send;
+ dev->recv = dw_eth_recv;
+ dev->halt = dw_eth_halt;
+ dev->write_hwaddr = dw_write_hwaddr;
+
+ eth_register(dev);
+
+ priv->interface = interface;
+
+ dw_mdio_init(dev->name, priv->mac_regs_p);
+ priv->bus = miiphy_get_dev_by_name(dev->name);
+
+ return dw_phy_init(dev);
+}
Code Review / kvmfornfv.git / blobdiff