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authorVipin KUMAR <vipin.kumar@st.com>2010-06-29 10:53:34 +0530
committerBen Warren <biggerbadderben@gmail.com>2010-07-12 00:08:05 -0700
commit5b1b1883ffcb75de71a0b4e66b279c88ae1e15fc (patch)
treeffc67591a22a14a71b994141a0b61682de775df5 /drivers/net/designware.c
parentc19a20d5bd3c2196fb1562a329191e2347d5a40a (diff)
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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>
Diffstat (limited to 'drivers/net/designware.c')
-rw-r--r--drivers/net/designware.c531
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;
+}