SPEAr : Network driver support added

Designware network driver support added.
This is a Synopsys ethernet controller

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

1 files changed, 531 insertions, 0 deletions

diff --git a/drivers/net/designware.c b/drivers/net/designware.c
new file mode 100644
index 0000000..d0d9827
--- /dev/null
+++ b/drivers/net/designware.c
@@ -0,0 +1,531 @@
+/*
+ * (C) Copyright 2010
+ * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
+ *
+ * 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
+ */
+
+/*
+ * Designware ethernet IP driver for u-boot
+ */
+
+#include <common.h>
+#include <miiphy.h>
+#include <malloc.h>
+#include <linux/err.h>
+#include <asm/io.h>
+#include "designware.h"
+
+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];
+
+	writel((ulong)&desc_table_p[0], &dma_p->txdesclistaddr);
+}
+
+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;
+
+	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];
+
+	writel((ulong)&desc_table_p[0], &dma_p->rxdesclistaddr);
+}
+
+static void descs_init(struct eth_device *dev)
+{
+	tx_descs_init(dev);
+	rx_descs_init(dev);
+}
+
+static int mac_reset(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;
+
+	int timeout = CONFIG_MACRESET_TIMEOUT;
+
+	writel(DMAMAC_SRST, &dma_p->busmode);
+	writel(MII_PORTSELECT, &mac_p->conf);
+
+	do {
+		if (!(readl(&dma_p->busmode) & DMAMAC_SRST))
+			return 0;
+		udelay(1000);
+	} while (timeout--);
+
+	return -1;
+}
+
+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 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;
+	u32 conf;
+
+	/* Reset ethernet hardware */
+	if (mac_reset(dev) < 0)
+		return -1;
+
+	writel(FIXEDBURST | PRIORXTX_41 | BURST_16,
+			&dma_p->busmode);
+
+	writel(FLUSHTXFIFO | readl(&dma_p->opmode), &dma_p->opmode);
+	writel(STOREFORWARD | TXSECONDFRAME, &dma_p->opmode);
+
+	conf = FRAMEBURSTENABLE | DISABLERXOWN;
+
+	if (priv->speed != SPEED_1000M)
+		conf |= MII_PORTSELECT;
+
+	if (priv->duplex == FULL_DUPLEX)
+		conf |= FULLDPLXMODE;
+
+	writel(conf, &mac_p->conf);
+
+	descs_init(dev);
+
+	/*
+	 * Start/Enable xfer at dma as well as mac level
+	 */
+	writel(readl(&dma_p->opmode) | RXSTART, &dma_p->opmode);
+	writel(readl(&dma_p->opmode) | TXSTART, &dma_p->opmode);
+
+	writel(readl(&mac_p->conf) | RXENABLE, &mac_p->conf);
+	writel(readl(&mac_p->conf) | TXENABLE, &mac_p->conf);
+
+	return 0;
+}
+
+static int dw_eth_send(struct eth_device *dev, volatile 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];
+
+	/* 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, (void *)packet, 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
+
+	/* 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 desc_num = priv->rx_currdescnum;
+	struct dmamacdescr *desc_p = &priv->rx_mac_descrtable[desc_num];
+
+	u32 status = desc_p->txrx_status;
+	int length = 0;
+
+	/* Check  if the owner is the CPU */
+	if (!(status & DESC_RXSTS_OWNBYDMA)) {
+
+		length = (status & DESC_RXSTS_FRMLENMSK) >> \
+			 DESC_RXSTS_FRMLENSHFT;
+
+		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;
+
+		/* Test the wrap-around condition. */
+		if (++desc_num >= CONFIG_RX_DESCR_NUM)
+			desc_num = 0;
+	}
+
+	priv->rx_currdescnum = desc_num;
+
+	return length;
+}
+
+static void dw_eth_halt(struct eth_device *dev)
+{
+	struct dw_eth_dev *priv = dev->priv;
+
+	mac_reset(dev);
+	priv->tx_currdescnum = priv->rx_currdescnum = 0;
+}
+
+static int eth_mdio_read(struct eth_device *dev, u8 addr, u8 reg, u16 *val)
+{
+	struct dw_eth_dev *priv = dev->priv;
+	struct eth_mac_regs *mac_p = priv->mac_regs_p;
+	u32 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);
+
+	do {
+		if (!(readl(&mac_p->miiaddr) & MII_BUSY)) {
+			*val = readl(&mac_p->miidata);
+			return 0;
+		}
+		udelay(1000);
+	} while (timeout--);
+
+	return -1;
+}
+
+static int eth_mdio_write(struct eth_device *dev, u8 addr, u8 reg, u16 val)
+{
+	struct dw_eth_dev *priv = dev->priv;
+	struct eth_mac_regs *mac_p = priv->mac_regs_p;
+	u32 miiaddr;
+	int ret = -1, timeout = CONFIG_MDIO_TIMEOUT;
+	u16 value;
+
+	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);
+
+	do {
+		if (!(readl(&mac_p->miiaddr) & MII_BUSY))
+			ret = 0;
+		udelay(1000);
+	} while (timeout--);
+
+	/* Needed as a fix for ST-Phy */
+	eth_mdio_read(dev, addr, reg, &value);
+
+	return ret;
+}
+
+#if defined(CONFIG_DW_SEARCH_PHY)
+static int find_phy(struct eth_device *dev)
+{
+	int phy_addr = 0;
+	u16 ctrl, oldctrl;
+
+	do {
+		eth_mdio_read(dev, phy_addr, PHY_BMCR, &ctrl);
+		oldctrl = ctrl & PHY_BMCR_AUTON;
+
+		ctrl ^= PHY_BMCR_AUTON;
+		eth_mdio_write(dev, phy_addr, PHY_BMCR, ctrl);
+		eth_mdio_read(dev, phy_addr, PHY_BMCR, &ctrl);
+		ctrl &= PHY_BMCR_AUTON;
+
+		if (ctrl == oldctrl) {
+			phy_addr++;
+		} else {
+			ctrl ^= PHY_BMCR_AUTON;
+			eth_mdio_write(dev, phy_addr, PHY_BMCR, ctrl);
+
+			return phy_addr;
+		}
+	} while (phy_addr < 32);
+
+	return -1;
+}
+#endif
+
+static int dw_reset_phy(struct eth_device *dev)
+{
+	struct dw_eth_dev *priv = dev->priv;
+	u16 ctrl;
+	int timeout = CONFIG_PHYRESET_TIMEOUT;
+	u32 phy_addr = priv->address;
+
+	eth_mdio_write(dev, phy_addr, PHY_BMCR, PHY_BMCR_RESET);
+	do {
+		eth_mdio_read(dev, phy_addr, PHY_BMCR, &ctrl);
+		if (!(ctrl & PHY_BMCR_RESET))
+			break;
+		udelay(1000);
+	} while (timeout--);
+
+	if (timeout < 0)
+		return -1;
+
+#ifdef CONFIG_PHY_RESET_DELAY
+	udelay(CONFIG_PHY_RESET_DELAY);
+#endif
+	return 0;
+}
+
+static int configure_phy(struct eth_device *dev)
+{
+	struct dw_eth_dev *priv = dev->priv;
+	int phy_addr;
+	u16 bmcr, ctrl;
+#if defined(CONFIG_DW_AUTONEG)
+	u16 bmsr;
+	u32 timeout;
+	u16 anlpar, btsr;
+#endif
+
+#if defined(CONFIG_DW_SEARCH_PHY)
+	phy_addr = find_phy(dev);
+	if (phy_addr > 0)
+		priv->address = phy_addr;
+	else
+		return -1;
+#endif
+	if (dw_reset_phy(dev) < 0)
+		return -1;
+
+#if defined(CONFIG_DW_AUTONEG)
+	bmcr = PHY_BMCR_AUTON | PHY_BMCR_RST_NEG | PHY_BMCR_100MB | \
+	       PHY_BMCR_DPLX | PHY_BMCR_1000_MBPS;
+#else
+	bmcr = PHY_BMCR_100MB | PHY_BMCR_DPLX;
+
+#if defined(CONFIG_DW_SPEED10M)
+	bmcr &= ~PHY_BMCR_100MB;
+#endif
+#if defined(CONFIG_DW_DUPLEXHALF)
+	bmcr &= ~PHY_BMCR_DPLX;
+#endif
+#endif
+	if (eth_mdio_write(dev, phy_addr, PHY_BMCR, bmcr) < 0)
+		return -1;
+
+	/* Read the phy status register and populate priv structure */
+#if defined(CONFIG_DW_AUTONEG)
+	timeout = CONFIG_AUTONEG_TIMEOUT;
+	do {
+		eth_mdio_read(dev, phy_addr, PHY_BMSR, &bmsr);
+		if (bmsr & PHY_BMSR_AUTN_COMP)
+			break;
+		udelay(1000);
+	} while (timeout--);
+
+	eth_mdio_read(dev, phy_addr, PHY_ANLPAR, &anlpar);
+	eth_mdio_read(dev, phy_addr, PHY_1000BTSR, &btsr);
+
+	if (btsr & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
+		priv->speed = SPEED_1000M;
+		if (btsr & PHY_1000BTSR_1000FD)
+			priv->duplex = FULL_DUPLEX;
+		else
+			priv->duplex = HALF_DUPLEX;
+	} else {
+		if (anlpar & PHY_ANLPAR_100)
+			priv->speed = SPEED_100M;
+		else
+			priv->speed = SPEED_10M;
+
+		if (anlpar & (PHY_ANLPAR_10FD | PHY_ANLPAR_TXFD))
+			priv->duplex = FULL_DUPLEX;
+		else
+			priv->duplex = HALF_DUPLEX;
+	}
+#else
+	if (eth_mdio_read(dev, phy_addr, PHY_BMCR, &ctrl) < 0)
+		return -1;
+
+	if (ctrl & PHY_BMCR_DPLX)
+		priv->duplex = FULL_DUPLEX;
+	else
+		priv->duplex = HALF_DUPLEX;
+
+	if (ctrl & PHY_BMCR_1000_MBPS)
+		priv->speed = SPEED_1000M;
+	else if (ctrl & PHY_BMCR_100_MBPS)
+		priv->speed = SPEED_100M;
+	else
+		priv->speed = SPEED_10M;
+#endif
+	return 0;
+}
+
+#if defined(CONFIG_MII)
+static int dw_mii_read(char *devname, u8 addr, u8 reg, u16 *val)
+{
+	struct eth_device *dev;
+
+	dev = eth_get_dev_by_name(devname);
+	if (dev)
+		eth_mdio_read(dev, addr, reg, val);
+
+	return 0;
+}
+
+static int dw_mii_write(char *devname, u8 addr, u8 reg, u16 val)
+{
+	struct eth_device *dev;
+
+	dev = eth_get_dev_by_name(devname);
+	if (dev)
+		eth_mdio_write(dev, addr, reg, val);
+
+	return 0;
+}
+#endif
+
+int designware_initialize(u32 id, ulong base_addr, u32 phy_addr)
+{
+	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, "mii%d", id);
+	dev->iobase = (int)base_addr;
+	dev->priv = priv;
+
+	eth_getenv_enetaddr_by_index(id, &dev->enetaddr[0]);
+
+	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);
+	priv->address = phy_addr;
+
+	if (mac_reset(dev) < 0)
+		return -1;
+
+	if (configure_phy(dev) < 0) {
+		printf("Phy could not be configured\n");
+		return -1;
+	}
+
+	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);
+
+#if defined(CONFIG_MII)
+	miiphy_register(dev->name, dw_mii_read, dw_mii_write);
+#endif
+	return 1;
+}