[PATCH] drivers/net: add driver for the EMAC device found in some TI SoCs
Jan Luebbe
jlu at pengutronix.de
Thu Sep 6 10:10:21 EDT 2012
Signed-off-by: Jan Luebbe <jlu at pengutronix.de>
---
arch/arm/mach-omap/include/mach/emac_defs.h | 48 +++
drivers/net/Kconfig | 5 +
drivers/net/Makefile | 1 +
drivers/net/davinci_emac.c | 618 +++++++++++++++++++++++++++
drivers/net/davinci_emac.h | 289 +++++++++++++
5 files changed, 961 insertions(+)
create mode 100644 arch/arm/mach-omap/include/mach/emac_defs.h
create mode 100644 drivers/net/davinci_emac.c
create mode 100644 drivers/net/davinci_emac.h
diff --git a/arch/arm/mach-omap/include/mach/emac_defs.h b/arch/arm/mach-omap/include/mach/emac_defs.h
new file mode 100644
index 0000000..568de6a
--- /dev/null
+++ b/arch/arm/mach-omap/include/mach/emac_defs.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2007 Sergey Kubushyn <ksi at koi8.net>
+ *
+ * Based on:
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * dm644x_emac.h
+ *
+ * TI DaVinci (DM644X) EMAC peripheral driver header for DV-EVM
+ *
+ * Copyright (C) 2005 Texas Instruments.
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * ----------------------------------------------------------------------------
+
+ * Modifications:
+ * ver. 1.0: Sep 2005, TI PSP Team - Created EMAC version for uBoot.
+ *
+ */
+
+#ifndef _AM3517_EMAC_H_
+#define _AM3517_EMAC_H_
+
+#define EMAC_BASE_ADDR 0x5C010000
+#define EMAC_WRAPPER_BASE_ADDR 0x5C000000
+#define EMAC_WRAPPER_RAM_ADDR 0x5C020000
+#define EMAC_MDIO_BASE_ADDR 0x5C030000
+#define EMAC_HW_RAM_ADDR 0x01E20000
+
+#define EMAC_MDIO_BUS_FREQ 166000000 /* 166 MHZ check */
+#define EMAC_MDIO_CLOCK_FREQ 1000000 /* 2.0 MHz */
+
+#endif /* _AM3517_EMAC_H_ */
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index dac1eb9..bfde54b 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -43,6 +43,11 @@ config DRIVER_NET_SMC91111
This option enables support for the SMSC LAN91C111
ethernet chip.
+config DRIVER_NET_DAVINCI_EMAC
+ bool "TI Davinci/OMAP EMAC ethernet driver"
+ depends on ARCH_DAVINCI || ARCH_OMAP3
+ select MIIDEV
+
config DRIVER_NET_DM9K
bool "Davicom dm9k[E|A|B] ethernet driver"
depends on HAS_DM9000
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 951a220..52611f8 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -1,6 +1,7 @@
obj-$(CONFIG_DRIVER_NET_CS8900) += cs8900.o
obj-$(CONFIG_DRIVER_NET_SMC911X) += smc911x.o
obj-$(CONFIG_DRIVER_NET_SMC91111) += smc91111.o
+obj-$(CONFIG_DRIVER_NET_DAVINCI_EMAC) += davinci_emac.o
obj-$(CONFIG_DRIVER_NET_DM9K) += dm9k.o
obj-$(CONFIG_DRIVER_NET_NETX) += netx_eth.o
obj-$(CONFIG_DRIVER_NET_AT91_ETHER) += at91_ether.o
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
new file mode 100644
index 0000000..09fcb63
--- /dev/null
+++ b/drivers/net/davinci_emac.c
@@ -0,0 +1,618 @@
+/*
+ * Copyright (C) 2012 Jan Luebbe <j.luebbe at pengutronix.de>
+ *
+ * Ethernet driver for TI TMS320DM644x (DaVinci) chips.
+ *
+ * Copyright (C) 2007 Sergey Kubushyn <ksi at koi8.net>
+ *
+ * Parts shamelessly stolen from TI's dm644x_emac.c. Original copyright
+ * follows:
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * dm644x_emac.c
+ *
+ * TI DaVinci (DM644X) EMAC peripheral driver source for DV-EVM
+ *
+ * Copyright (C) 2005 Texas Instruments.
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * ----------------------------------------------------------------------------
+
+ * Modifications:
+ * ver. 1.0: Sep 2005, Anant Gole - Created EMAC version for uBoot.
+ * ver 1.1: Nov 2005, Anant Gole - Extended the RX logic for multiple descriptors
+ *
+ */
+
+#include <common.h>
+#include <io.h>
+#include <clock.h>
+#include <net.h>
+#include <miidev.h>
+#include <malloc.h>
+#include <init.h>
+#include <asm/mmu.h>
+#include <asm/system.h>
+#include <mach/emac_defs.h>
+#include "davinci_emac.h"
+
+struct davinci_emac_priv {
+ struct device_d *dev;
+ struct eth_device edev;
+ struct mii_device miidev;
+
+ /* EMAC Addresses */
+ void __iomem *adap_emac; /* = EMAC_BASE_ADDR */
+ void __iomem *adap_ewrap; /* = EMAC_WRAPPER_BASE_ADDR */
+ void __iomem *adap_mdio; /* = EMAC_MDIO_BASE_ADDR */
+
+ /* EMAC descriptors */
+ void __iomem *emac_desc_base; /* = EMAC_WRAPPER_RAM_ADDR */
+ void __iomem *emac_rx_desc; /* = EMAC_WRAPPER_RAM_ADDR + EMAC_RX_DESC_BASE */
+ void __iomem *emac_tx_desc; /* = EMAC_WRAPPER_RAM_ADDR + EMAC_TX_DESC_BASE */
+ void __iomem *emac_rx_active_head; /* = 0 */
+ void __iomem *emac_rx_active_tail; /* = 0 */
+ int emac_rx_queue_active; /* = 0 */
+
+ /* Receive packet buffers */
+ unsigned char *emac_rx_buffers; /* [EMAC_MAX_RX_BUFFERS * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN)] */
+
+ /* PHY address for a discovered PHY (0xff - not found) */
+ uint8_t active_phy_addr; /* = 0xff */
+
+ /* mac_addr[0] goes out on the wire first */
+ uint8_t mac_addr[6];
+};
+
+#ifdef EMAC_HW_RAM_ADDR
+static inline uint32_t BD_TO_HW(void __iomem *x)
+{
+ if (x == 0)
+ return 0;
+
+ return (uint32_t)(x) - EMAC_WRAPPER_RAM_ADDR + EMAC_HW_RAM_ADDR;
+}
+
+static inline void __iomem *HW_TO_BD(uint32_t x)
+{
+ if (x == 0)
+ return 0;
+
+ return (struct emac_desc*)(x - EMAC_HW_RAM_ADDR + EMAC_WRAPPER_RAM_ADDR);
+}
+#else
+#define BD_TO_HW(x) (x)
+#define HW_TO_BD(x) (x)
+#endif
+
+static void davinci_eth_mdio_enable(struct davinci_emac_priv *priv)
+{
+ uint32_t clkdiv;
+
+ clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
+
+ dev_dbg(priv->dev, "mdio_enable + 0x%08x\n",
+ readl(priv->adap_mdio + EMAC_MDIO_CONTROL));
+ writel((clkdiv & 0xff) |
+ MDIO_CONTROL_ENABLE |
+ MDIO_CONTROL_FAULT |
+ MDIO_CONTROL_FAULT_ENABLE,
+ priv->adap_mdio + EMAC_MDIO_CONTROL);
+ dev_dbg(priv->dev, "mdio_enable - 0x%08x\n",
+ readl(priv->adap_mdio + EMAC_MDIO_CONTROL));
+
+ while (readl(priv->adap_mdio + EMAC_MDIO_CONTROL) & MDIO_CONTROL_IDLE);
+}
+
+/* Read a PHY register via MDIO inteface. Returns 1 on success, 0 otherwise */
+static int davinci_eth_phy_read(struct davinci_emac_priv *priv, uint8_t phy_addr, uint8_t reg_num, uint16_t *data)
+{
+ int tmp;
+
+ while (readl(priv->adap_mdio + EMAC_MDIO_USERACCESS0) & MDIO_USERACCESS0_GO);
+
+ writel(MDIO_USERACCESS0_GO |
+ MDIO_USERACCESS0_WRITE_READ |
+ ((reg_num & 0x1f) << 21) |
+ ((phy_addr & 0x1f) << 16),
+ priv->adap_mdio + EMAC_MDIO_USERACCESS0);
+
+ /* Wait for command to complete */
+ while ((tmp = readl(priv->adap_mdio + EMAC_MDIO_USERACCESS0)) & MDIO_USERACCESS0_GO);
+
+ if (tmp & MDIO_USERACCESS0_ACK) {
+ *data = tmp & 0xffff;
+ dev_dbg(priv->dev, "emac_phy_read: addr=0x%02x reg=0x%02x data=0x%04x\n",
+ phy_addr, reg_num, *data);
+ return 1;
+ }
+
+ *data = -1;
+ return 0;
+}
+
+/* Write to a PHY register via MDIO inteface. Blocks until operation is complete. */
+static int davinci_eth_phy_write(struct davinci_emac_priv *priv, uint8_t phy_addr, uint8_t reg_num, uint16_t data)
+{
+
+ while (readl(priv->adap_mdio + EMAC_MDIO_USERACCESS0) & MDIO_USERACCESS0_GO);
+
+ dev_dbg(priv->dev, "emac_phy_write: addr=0x%02x reg=0x%02x data=0x%04x\n",
+ phy_addr, reg_num, data);
+ writel(MDIO_USERACCESS0_GO |
+ MDIO_USERACCESS0_WRITE_WRITE |
+ ((reg_num & 0x1f) << 21) |
+ ((phy_addr & 0x1f) << 16) |
+ (data & 0xffff),
+ priv->adap_mdio + EMAC_MDIO_USERACCESS0);
+
+ /* Wait for command to complete */
+ while (readl(priv->adap_mdio + EMAC_MDIO_USERACCESS0) & MDIO_USERACCESS0_GO);
+
+ return 1;
+}
+
+static int davinci_miidev_read(struct mii_device *dev, int addr, int reg)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)dev->edev->priv;
+ uint16_t value = 0;
+ return davinci_eth_phy_read(priv, addr, reg, &value) ? value : -1;
+}
+
+static int davinci_miidev_write(struct mii_device *dev, int addr, int reg, int value)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)dev->edev->priv;
+ return davinci_eth_phy_write(priv, addr, reg, value) ? 0 : -1;
+}
+
+static int davinci_emac_get_ethaddr(struct eth_device *edev, unsigned char *adr)
+{
+ return -1;
+}
+
+/*
+ * This function must be called before emac_open() if you want to override
+ * the default mac address.
+ */
+static int davinci_emac_set_ethaddr(struct eth_device *edev, unsigned char *addr)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
+ int i;
+
+ for (i = 0; i < sizeof(priv->mac_addr); i++)
+ priv->mac_addr[i] = addr[i];
+ return 0;
+}
+
+static int davinci_emac_init(struct eth_device *edev)
+{
+ dev_dbg(&edev->dev, "* emac_init\n");
+ return 0;
+}
+
+static int davinci_emac_open(struct eth_device *edev)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
+ uint32_t clkdiv, cnt;
+ void __iomem *rx_desc;
+ unsigned long mac_hi, mac_lo;
+ int ret;
+
+ dev_dbg(priv->dev, "+ emac_open\n");
+
+ dev_dbg(priv->dev, "emac->TXIDVER: 0x%08x\n",
+ readl(priv->adap_emac + EMAC_TXIDVER));
+ dev_dbg(priv->dev, "emac->RXIDVER: 0x%08x\n",
+ readl(priv->adap_emac + EMAC_RXIDVER));
+
+ /* Reset EMAC module and disable interrupts in wrapper */
+ writel(1, priv->adap_emac + EMAC_SOFTRESET);
+ while (readl(priv->adap_emac + EMAC_SOFTRESET) != 0);
+ writel(1, priv->adap_ewrap + EMAC_EWRAP_SOFTRESET);
+ while (readl(priv->adap_ewrap + EMAC_EWRAP_SOFTRESET) != 0);
+
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C0RXEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C1RXEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C2RXEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C0TXEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C1TXEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C2TXEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C0MISCEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C1MISCEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C2MISCEN);
+
+ rx_desc = priv->emac_rx_desc;
+
+ /*
+ * Set MAC Addresses & Init multicast Hash to 0 (disable any multicast
+ * receive)
+ * Use channel 0 only - other channels are disabled
+ */
+ writel(0, priv->adap_emac + EMAC_MACINDEX);
+ mac_hi = (priv->mac_addr[3] << 24) |
+ (priv->mac_addr[2] << 16) |
+ (priv->mac_addr[1] << 8) |
+ (priv->mac_addr[0]);
+ mac_lo = (priv->mac_addr[5] << 8) |
+ (priv->mac_addr[4]);
+
+ writel(mac_hi, priv->adap_emac + EMAC_MACADDRHI);
+ writel(mac_lo | EMAC_MAC_ADDR_IS_VALID | EMAC_MAC_ADDR_MATCH,
+ priv->adap_emac + EMAC_MACADDRLO);
+
+ /* Set source MAC address - REQUIRED */
+ writel(mac_hi, priv->adap_emac + EMAC_MACSRCADDRHI);
+ writel(mac_lo, priv->adap_emac + EMAC_MACSRCADDRLO);
+
+ /* Set DMA head and completion pointers to 0 */
+ for(cnt = 0; cnt < 8; cnt++) {
+ writel(0, (void *)priv->adap_emac + EMAC_TX0HDP + 4 * cnt);
+ writel(0, (void *)priv->adap_emac + EMAC_RX0HDP + 4 * cnt);
+ writel(0, (void *)priv->adap_emac + EMAC_TX0CP + 4 * cnt);
+ writel(0, (void *)priv->adap_emac + EMAC_RX0CP + 4 * cnt);
+ }
+
+ /* Clear Statistics (do this before setting MacControl register) */
+ for(cnt = 0; cnt < EMAC_NUM_STATS; cnt++)
+ writel(0, (void *)priv->adap_emac + EMAC_RXGOODFRAMES + 4 * cnt);
+
+ /* No multicast addressing */
+ writel(0, priv->adap_emac + EMAC_MACHASH1);
+ writel(0, priv->adap_emac + EMAC_MACHASH2);
+
+ writel(0x01, priv->adap_emac + EMAC_TXCONTROL);
+ writel(0x01, priv->adap_emac + EMAC_RXCONTROL);
+
+ /* Create RX queue and set receive process in place */
+ priv->emac_rx_active_head = priv->emac_rx_desc;
+ for (cnt = 0; cnt < EMAC_MAX_RX_BUFFERS; cnt++) {
+ writel(BD_TO_HW(rx_desc + EMAC_DESC_SIZE), rx_desc + EMAC_DESC_NEXT);
+ writel(&priv->emac_rx_buffers[cnt * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN)], rx_desc + EMAC_DESC_BUFFER);
+ writel(EMAC_MAX_ETHERNET_PKT_SIZE, rx_desc + EMAC_DESC_BUFF_OFF_LEN);
+ writel(EMAC_CPPI_OWNERSHIP_BIT, rx_desc + EMAC_DESC_PKT_FLAG_LEN);
+ rx_desc += EMAC_DESC_SIZE;
+ }
+
+ /* Set the last descriptor's "next" parameter to 0 to end the RX desc list */
+ rx_desc -= EMAC_DESC_SIZE;
+ writel(0, rx_desc + EMAC_DESC_NEXT);
+ priv->emac_rx_active_tail = rx_desc;
+ priv->emac_rx_queue_active = 1;
+
+ /* Enable TX/RX */
+ writel(EMAC_MAX_ETHERNET_PKT_SIZE, priv->adap_emac + EMAC_RXMAXLEN);
+ writel(0, priv->adap_emac + EMAC_RXBUFFEROFFSET);
+
+ /* No fancy configs - Use this for promiscous for debug - EMAC_RXMBPENABLE_RXCAFEN_ENABLE */
+ writel(EMAC_RXMBPENABLE_RXBROADEN, priv->adap_emac + EMAC_RXMBPENABLE);
+
+ /* Enable ch 0 only */
+ writel(0x01, priv->adap_emac + EMAC_RXUNICASTSET);
+
+ /* Enable MII interface and full duplex mode (using RMMI) */
+ writel((EMAC_MACCONTROL_MIIEN_ENABLE |
+ EMAC_MACCONTROL_FULLDUPLEX_ENABLE |
+ EMAC_MACCONTROL_RMIISPEED_100),
+ priv->adap_emac + EMAC_MACCONTROL);
+
+ /* Init MDIO & get link state */
+ clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
+ writel((clkdiv & 0xff) | MDIO_CONTROL_ENABLE | MDIO_CONTROL_FAULT,
+ priv->adap_mdio + EMAC_MDIO_CONTROL);
+
+ /* Start receive process */
+ writel(BD_TO_HW(priv->emac_rx_desc), priv->adap_emac + EMAC_RX0HDP);
+
+ ret = miidev_wait_aneg(&priv->miidev);
+ if (ret)
+ return ret;
+
+ ret = miidev_get_status(&priv->miidev);
+ if (ret < 0)
+ return ret;
+
+ miidev_print_status(&priv->miidev);
+
+ dev_dbg(priv->dev, "- emac_open\n");
+
+ return 0;
+}
+
+/* EMAC Channel Teardown */
+static void davinci_eth_ch_teardown(struct davinci_emac_priv *priv, int ch)
+{
+ uint32_t dly = 0xff;
+ uint32_t cnt;
+
+ dev_dbg(priv->dev, "+ emac_ch_teardown\n");
+
+ if (ch == EMAC_CH_TX) {
+ /* Init TX channel teardown */
+ writel(0, priv->adap_emac + EMAC_TXTEARDOWN);
+ for(cnt = 0; cnt != 0xfffffffc; cnt = readl(priv->adap_emac + EMAC_TX0CP)) {
+ /* Wait here for Tx teardown completion interrupt to occur
+ * Note: A task delay can be called here to pend rather than
+ * occupying CPU cycles - anyway it has been found that teardown
+ * takes very few cpu cycles and does not affect functionality */
+ dly--;
+ udelay(1);
+ if (dly == 0)
+ break;
+ }
+ writel(cnt, priv->adap_emac + EMAC_TX0CP);
+ writel(0, priv->adap_emac + EMAC_TX0HDP);
+ } else {
+ /* Init RX channel teardown */
+ writel(0, priv->adap_emac + EMAC_RXTEARDOWN);
+ for(cnt = 0; cnt != 0xfffffffc; cnt = readl(priv->adap_emac + EMAC_RX0CP)) {
+ /* Wait here for Rx teardown completion interrupt to occur
+ * Note: A task delay can be called here to pend rather than
+ * occupying CPU cycles - anyway it has been found that teardown
+ * takes very few cpu cycles and does not affect functionality */
+ dly--;
+ udelay(1);
+ if (dly == 0)
+ break;
+ }
+ writel(cnt, priv->adap_emac + EMAC_RX0CP);
+ writel(0, priv->adap_emac + EMAC_RX0HDP);
+ }
+
+ dev_dbg(priv->dev, "- emac_ch_teardown\n");
+}
+
+static void davinci_emac_halt(struct eth_device *edev)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
+
+ dev_dbg(priv->dev, "+ emac_halt\n");
+
+ davinci_eth_ch_teardown(priv, EMAC_CH_TX); /* TX Channel teardown */
+ davinci_eth_ch_teardown(priv, EMAC_CH_RX); /* RX Channel teardown */
+
+ /* Reset EMAC module and disable interrupts in wrapper */
+ writel(1, priv->adap_emac + EMAC_SOFTRESET);
+ writel(1, priv->adap_ewrap + EMAC_EWRAP_SOFTRESET);
+
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C0RXEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C1RXEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C2RXEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C0TXEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C1TXEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C2TXEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C0MISCEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C1MISCEN);
+ writel(0, priv->adap_ewrap + EMAC_EWRAP_C2MISCEN);
+
+ dev_dbg(priv->dev, "- emac_halt\n");
+}
+
+/*
+ * This function sends a single packet on the network and returns
+ * positive number (number of bytes transmitted) or negative for error
+ */
+static int davinci_emac_send(struct eth_device *edev, void *packet, int length)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
+ uint64_t start;
+ int ret_status = -1;
+
+ dev_dbg(priv->dev, "+ emac_send (length %d)\n", length);
+
+ /* Check packet size and if < EMAC_MIN_ETHERNET_PKT_SIZE, pad it up */
+ if (length < EMAC_MIN_ETHERNET_PKT_SIZE) {
+ length = EMAC_MIN_ETHERNET_PKT_SIZE;
+ }
+
+ /* Populate the TX descriptor */
+ writel(0, priv->emac_tx_desc + EMAC_DESC_NEXT);
+ writel((uint8_t *) packet, priv->emac_tx_desc + EMAC_DESC_BUFFER);
+ writel((length & 0xffff), priv->emac_tx_desc + EMAC_DESC_BUFF_OFF_LEN);
+ writel(((length & 0xffff) | EMAC_CPPI_SOP_BIT |
+ EMAC_CPPI_OWNERSHIP_BIT |
+ EMAC_CPPI_EOP_BIT),
+ priv->emac_tx_desc + EMAC_DESC_PKT_FLAG_LEN);
+ dma_flush_range((ulong) packet, (ulong)packet + length);
+ /* Send the packet */
+ writel(BD_TO_HW(priv->emac_tx_desc), priv->adap_emac + EMAC_TX0HDP);
+
+ /* Wait for packet to complete or link down */
+ start = get_time_ns();
+ while (1) {
+ if (readl(priv->adap_emac + EMAC_TXINTSTATRAW) & 0x01) {
+ /* Acknowledge the TX descriptor */
+ writel(BD_TO_HW(priv->emac_tx_desc), priv->adap_emac + EMAC_TX0CP);
+ ret_status = length;
+ break;
+ }
+ if (is_timeout(start, 100 * MSECOND)) {
+ ret_status = -ETIMEDOUT;
+ break;
+ }
+ }
+
+ dev_dbg(priv->dev, "- emac_send (ret_status %i)\n", ret_status);
+ return ret_status;
+}
+
+/*
+ * This function handles receipt of a packet from the network
+ */
+static int davinci_emac_recv(struct eth_device *edev)
+{
+ struct davinci_emac_priv *priv = (struct davinci_emac_priv *)edev->priv;
+ void __iomem *rx_curr_desc, *curr_desc, *tail_desc;
+ unsigned char *pkt;
+ int status, len, ret = -1;
+
+ dev_dbg(priv->dev, "+ emac_recv\n");
+
+ rx_curr_desc = priv->emac_rx_active_head;
+ status = readl(rx_curr_desc + EMAC_DESC_PKT_FLAG_LEN);
+ if (status & EMAC_CPPI_OWNERSHIP_BIT) {
+ ret = 0;
+ goto out;
+ }
+
+ if (status & EMAC_CPPI_RX_ERROR_FRAME) {
+ /* Error in packet - discard it and requeue desc */
+ dev_warn(priv->dev, "WARN: emac_rcv_pkt: Error in packet\n");
+ } else {
+ pkt = (unsigned char *)readl(rx_curr_desc + EMAC_DESC_BUFFER);
+ len = readl(rx_curr_desc + EMAC_DESC_BUFF_OFF_LEN) & 0xffff;
+ dev_dbg(priv->dev, "| emac_recv got packet (length %i)\n", len);
+ dma_inv_range((ulong)pkt,
+ (ulong)readl(rx_curr_desc + EMAC_DESC_BUFFER) + len);
+ net_receive(pkt, len);
+ ret = len;
+ }
+
+ /* Ack received packet descriptor */
+ writel(BD_TO_HW(rx_curr_desc), priv->adap_emac + EMAC_RX0CP);
+ curr_desc = rx_curr_desc;
+ priv->emac_rx_active_head = HW_TO_BD(readl(rx_curr_desc + EMAC_DESC_NEXT));
+
+ if (status & EMAC_CPPI_EOQ_BIT) {
+ if (priv->emac_rx_active_head) {
+ writel(BD_TO_HW(priv->emac_rx_active_head),
+ priv->adap_emac + EMAC_RX0HDP);
+ } else {
+ priv->emac_rx_queue_active = 0;
+ dev_info(priv->dev, "INFO:emac_rcv_packet: RX Queue not active\n");
+ }
+ }
+
+ /* Recycle RX descriptor */
+ writel(EMAC_MAX_ETHERNET_PKT_SIZE, rx_curr_desc + EMAC_DESC_BUFF_OFF_LEN);
+ writel(EMAC_CPPI_OWNERSHIP_BIT, rx_curr_desc + EMAC_DESC_PKT_FLAG_LEN);
+ writel(0, rx_curr_desc + EMAC_DESC_NEXT);
+
+ if (priv->emac_rx_active_head == 0) {
+ dev_info(priv->dev, "INFO: emac_rcv_pkt: active queue head = 0\n");
+ priv->emac_rx_active_head = curr_desc;
+ priv->emac_rx_active_tail = curr_desc;
+ if (priv->emac_rx_queue_active != 0) {
+ writel(BD_TO_HW(priv->emac_rx_active_head), priv->adap_emac + EMAC_RX0HDP);
+ dev_info(priv->dev, "INFO: emac_rcv_pkt: active queue head = 0, HDP fired\n");
+ priv->emac_rx_queue_active = 1;
+ }
+ } else {
+ tail_desc = priv->emac_rx_active_tail;
+ priv->emac_rx_active_tail = curr_desc;
+ writel(BD_TO_HW(curr_desc), tail_desc + EMAC_DESC_NEXT);
+ status = readl(tail_desc + EMAC_DESC_PKT_FLAG_LEN);
+ if (status & EMAC_CPPI_EOQ_BIT) {
+ writel(BD_TO_HW(curr_desc), priv->adap_emac + EMAC_RX0HDP);
+ status &= ~EMAC_CPPI_EOQ_BIT;
+ writel(status, tail_desc + EMAC_DESC_PKT_FLAG_LEN);
+ }
+ }
+
+out:
+ dev_dbg(priv->dev, "- emac_recv\n");
+
+ return ret;
+}
+
+static int davinci_emac_probe(struct device_d *dev)
+{
+ struct davinci_emac_priv *priv;
+ uint64_t start;
+
+ dev_dbg(dev, "+ emac_probe\n");
+
+ priv = xzalloc(sizeof(*priv));
+ dev->priv = priv;
+
+ priv->dev = dev;
+
+ priv->adap_emac = dev_request_mem_region(dev, 0);
+ priv->adap_ewrap = dev_request_mem_region(dev, 1);
+ priv->adap_mdio = dev_request_mem_region(dev, 2);
+ priv->emac_desc_base = dev_request_mem_region(dev, 3);
+
+ /* EMAC descriptors */
+ priv->emac_rx_desc = priv->emac_desc_base + EMAC_RX_DESC_BASE;
+ priv->emac_tx_desc = priv->emac_desc_base + EMAC_TX_DESC_BASE;
+ priv->emac_rx_active_head = NULL;
+ priv->emac_rx_active_tail = NULL;
+ priv->emac_rx_queue_active = 0;
+
+ /* Receive packet buffers */
+ priv->emac_rx_buffers = xmemalign(4096, EMAC_MAX_RX_BUFFERS * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN));
+
+ /* PHY address for a discovered PHY (0xff - not found) */
+ priv->active_phy_addr = 0xff;
+
+ priv->edev.priv = priv;
+ priv->edev.init = davinci_emac_init;
+ priv->edev.open = davinci_emac_open;
+ priv->edev.halt = davinci_emac_halt;
+ priv->edev.send = davinci_emac_send;
+ priv->edev.recv = davinci_emac_recv;
+ priv->edev.get_ethaddr = davinci_emac_get_ethaddr;
+ priv->edev.set_ethaddr = davinci_emac_set_ethaddr;
+ priv->edev.parent = dev;
+
+ davinci_eth_mdio_enable(priv);
+
+ start = get_time_ns();
+ while (1) {
+ if (readl(priv->adap_mdio + EMAC_MDIO_ALIVE))
+ break;
+ if (is_timeout(start, 256 * MSECOND)) {
+ dev_err(dev, "No ETH PHY detected!\n");
+ break;
+ }
+ }
+
+ priv->miidev.read = davinci_miidev_read;
+ priv->miidev.write = davinci_miidev_write;
+ priv->miidev.address = 0x01;
+ priv->miidev.flags = MIIDEV_FORCE_LINK;
+ priv->miidev.edev = &priv->edev;
+ priv->miidev.parent = dev;
+
+ mii_register(&priv->miidev);
+
+ eth_register(&priv->edev);
+
+ dev_dbg(dev, "- emac_probe\n");
+ return 0;
+}
+
+static void davinci_emac_remove(struct device_d *dev)
+{
+ struct davinci_emac_priv *priv = dev->priv;
+
+ davinci_emac_halt(&priv->edev);
+}
+
+static struct driver_d davinci_emac_driver = {
+ .name = "davinci_emac",
+ .probe = davinci_emac_probe,
+ .remove = davinci_emac_remove,
+};
+
+static int davinci_emac_register(void)
+{
+ register_driver(&davinci_emac_driver);
+ return 0;
+}
+
+device_initcall(davinci_emac_register);
diff --git a/drivers/net/davinci_emac.h b/drivers/net/davinci_emac.h
new file mode 100644
index 0000000..c5fa018
--- /dev/null
+++ b/drivers/net/davinci_emac.h
@@ -0,0 +1,289 @@
+/*
+ * Copyright (C) 2007 Sergey Kubushyn <ksi at koi8.net>
+ *
+ * Based on:
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * dm644x_emac.h
+ *
+ * TI DaVinci (DM644X) EMAC peripheral driver header for DV-EVM
+ *
+ * Copyright (C) 2005 Texas Instruments.
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * ----------------------------------------------------------------------------
+ */
+
+#ifndef _DAVINCI_EMAC_H_
+#define _DAVINCI_EMAC_H_
+
+/* PHY mask - set only those phy number bits where phy is/can be connected */
+#define EMAC_MDIO_PHY_NUM 1
+#define EMAC_MDIO_PHY_MASK (1 << EMAC_MDIO_PHY_NUM)
+
+/* Ethernet Min/Max packet size */
+#define EMAC_MIN_ETHERNET_PKT_SIZE 60
+#define EMAC_MAX_ETHERNET_PKT_SIZE 1518
+#define EMAC_PKT_ALIGN 18 /* 1518 + 18 = 1536 (packet aligned on 32 byte boundry) */
+
+/* Number of RX packet buffers
+ * NOTE: Only 1 buffer supported as of now
+ */
+#define EMAC_MAX_RX_BUFFERS 10
+
+/***********************************************
+ ******** Internally used macros ***************
+ ***********************************************/
+
+#define EMAC_CH_TX 1
+#define EMAC_CH_RX 0
+
+/* Each descriptor occupies 4 words, lets start RX desc's at 0 and
+ * reserve space for 64 descriptors max
+ */
+#define EMAC_RX_DESC_BASE 0x0
+#define EMAC_TX_DESC_BASE 0x1000
+
+/* EMAC Teardown value */
+#define EMAC_TEARDOWN_VALUE 0xfffffffc
+
+/* MII Status Register */
+#define MII_STATUS_REG 1
+
+/* Number of statistics registers */
+#define EMAC_NUM_STATS 36
+
+/* EMAC Descriptor Offsets */
+#define EMAC_DESC_NEXT 0x0 /* Pointer to next descriptor in chain */
+#define EMAC_DESC_BUFFER 0x4 /* Pointer to data buffer */
+#define EMAC_DESC_BUFF_OFF_LEN 0x8 /* Buffer Offset(MSW) and Length(LSW) */
+#define EMAC_DESC_PKT_FLAG_LEN 0xc /* Packet Flags(MSW) and Length(LSW) */
+#define EMAC_DESC_SIZE 0x10
+
+/* CPPI bit positions */
+#define EMAC_CPPI_SOP_BIT (0x80000000)
+#define EMAC_CPPI_EOP_BIT (0x40000000)
+#define EMAC_CPPI_OWNERSHIP_BIT (0x20000000)
+#define EMAC_CPPI_EOQ_BIT (0x10000000)
+#define EMAC_CPPI_TEARDOWN_COMPLETE_BIT (0x08000000)
+#define EMAC_CPPI_PASS_CRC_BIT (0x04000000)
+
+#define EMAC_CPPI_RX_ERROR_FRAME (0x03fc0000)
+
+#define EMAC_MACCONTROL_MIIEN_ENABLE (0x20)
+#define EMAC_MACCONTROL_FULLDUPLEX_ENABLE (0x1)
+#define EMAC_MACCONTROL_GIGABIT_ENABLE (1 << 7)
+#define EMAC_MACCONTROL_GIGFORCE (1 << 17)
+#define EMAC_MACCONTROL_RMIISPEED_100 (1 << 15)
+
+#define EMAC_MAC_ADDR_MATCH (1 << 19)
+#define EMAC_MAC_ADDR_IS_VALID (1 << 20)
+
+#define EMAC_RXMBPENABLE_RXCAFEN_ENABLE (0x200000)
+#define EMAC_RXMBPENABLE_RXBROADEN (0x2000)
+
+#define MDIO_CONTROL_IDLE (0x80000000)
+#define MDIO_CONTROL_ENABLE (0x40000000)
+#define MDIO_CONTROL_FAULT_ENABLE (0x40000)
+#define MDIO_CONTROL_FAULT (0x80000)
+#define MDIO_USERACCESS0_GO (0x80000000)
+#define MDIO_USERACCESS0_WRITE_READ (0x0)
+#define MDIO_USERACCESS0_WRITE_WRITE (0x40000000)
+#define MDIO_USERACCESS0_ACK (0x20000000)
+
+/* Ethernet MAC Registers */
+#define EMAC_TXIDVER 0x000
+#define EMAC_TXCONTROL 0x004
+#define EMAC_TXTEARDOWN 0x008
+#define EMAC_RXIDVER 0x010
+#define EMAC_RXCONTROL 0x014
+#define EMAC_RXTEARDOWN 0x018
+#define EMAC_TXINTSTATRAW 0x080
+#define EMAC_TXINTSTATMASKED 0x084
+#define EMAC_TXINTMASKSET 0x088
+#define EMAC_TXINTMASKCLEAR 0x08c
+#define EMAC_MACINVECTOR 0x090
+#define EMAC_MACEOIVECTOR 0x094
+#define EMAC_RXINTSTATRAW 0x0a0
+#define EMAC_RXINTSTATMASKED 0x0a4
+#define EMAC_RXINTMASKSET 0x0a8
+#define EMAC_RXINTMASKCLEAR 0x0ac
+#define EMAC_MACINTSTATRAW 0x0b0
+#define EMAC_MACINTSTATMASKED 0x0b4
+#define EMAC_MACINTMASKSET 0x0b8
+#define EMAC_MACINTMASKCLEAR 0x0bc
+#define EMAC_RXMBPENABLE 0x100
+#define EMAC_RXUNICASTSET 0x104
+#define EMAC_RXUNICASTCLEAR 0x108
+#define EMAC_RXMAXLEN 0x10c
+#define EMAC_RXBUFFEROFFSET 0x110
+#define EMAC_RXFILTERLOWTHRESH 0x114
+#define EMAC_RX0FLOWTHRESH 0x120
+#define EMAC_RX1FLOWTHRESH 0x124
+#define EMAC_RX2FLOWTHRESH 0x128
+#define EMAC_RX3FLOWTHRESH 0x12c
+#define EMAC_RX4FLOWTHRESH 0x130
+#define EMAC_RX5FLOWTHRESH 0x134
+#define EMAC_RX6FLOWTHRESH 0x138
+#define EMAC_RX7FLOWTHRESH 0x13c
+#define EMAC_RX0FREEBUFFER 0x140
+#define EMAC_RX1FREEBUFFER 0x144
+#define EMAC_RX2FREEBUFFER 0x148
+#define EMAC_RX3FREEBUFFER 0x14c
+#define EMAC_RX4FREEBUFFER 0x150
+#define EMAC_RX5FREEBUFFER 0x154
+#define EMAC_RX6FREEBUFFER 0x158
+#define EMAC_RX7FREEBUFFER 0x15c
+#define EMAC_MACCONTROL 0x160
+#define EMAC_MACSTATUS 0x164
+#define EMAC_EMCONTROL 0x168
+#define EMAC_FIFOCONTROL 0x16c
+#define EMAC_MACCONFIG 0x170
+#define EMAC_SOFTRESET 0x174
+#define EMAC_MACSRCADDRLO 0x1d0
+#define EMAC_MACSRCADDRHI 0x1d4
+#define EMAC_MACHASH1 0x1d8
+#define EMAC_MACHASH2 0x1dc
+#define EMAC_BOFFTEST 0x1e0
+#define EMAC_TPACETEST 0x1e4
+#define EMAC_RXPAUSE 0x1e8
+#define EMAC_TXPAUSE 0x1ec
+#define EMAC_RXGOODFRAMES 0x200
+#define EMAC_RXBCASTFRAMES 0x204
+#define EMAC_RXMCASTFRAMES 0x208
+#define EMAC_RXPAUSEFRAMES 0x20c
+#define EMAC_RXCRCERRORS 0x210
+#define EMAC_RXALIGNCODEERRORS 0x214
+#define EMAC_RXOVERSIZED 0x218
+#define EMAC_RXJABBER 0x21c
+#define EMAC_RXUNDERSIZED 0x220
+#define EMAC_RXFRAGMENTS 0x224
+#define EMAC_RXFILTERED 0x228
+#define EMAC_RXQOSFILTERED 0x22c
+#define EMAC_RXOCTETS 0x230
+#define EMAC_TXGOODFRAMES 0x234
+#define EMAC_TXBCASTFRAMES 0x238
+#define EMAC_TXMCASTFRAMES 0x23c
+#define EMAC_TXPAUSEFRAMES 0x240
+#define EMAC_TXDEFERRED 0x244
+#define EMAC_TXCOLLISION 0x248
+#define EMAC_TXSINGLECOLL 0x24c
+#define EMAC_TXMULTICOLL 0x250
+#define EMAC_TXEXCESSIVECOLL 0x254
+#define EMAC_TXLATECOLL 0x258
+#define EMAC_TXUNDERRUN 0x25c
+#define EMAC_TXCARRIERSENSE 0x260
+#define EMAC_TXOCTETS 0x264
+#define EMAC_FRAME64 0x268
+#define EMAC_FRAME65T127 0x26c
+#define EMAC_FRAME128T255 0x270
+#define EMAC_FRAME256T511 0x274
+#define EMAC_FRAME512T1023 0x278
+#define EMAC_FRAME1024TUP 0x27c
+#define EMAC_NETOCTETS 0x280
+#define EMAC_RXSOFOVERRUNS 0x284
+#define EMAC_RXMOFOVERRUNS 0x288
+#define EMAC_RXDMAOVERRUNS 0x28c
+#define EMAC_MACADDRLO 0x500
+#define EMAC_MACADDRHI 0x504
+#define EMAC_MACINDEX 0x508
+#define EMAC_TX0HDP 0x600
+#define EMAC_TX1HDP 0x604
+#define EMAC_TX2HDP 0x608
+#define EMAC_TX3HDP 0x60c
+#define EMAC_TX4HDP 0x610
+#define EMAC_TX5HDP 0x614
+#define EMAC_TX6HDP 0x618
+#define EMAC_TX7HDP 0x61c
+#define EMAC_RX0HDP 0x620
+#define EMAC_RX1HDP 0x624
+#define EMAC_RX2HDP 0x628
+#define EMAC_RX3HDP 0x62c
+#define EMAC_RX4HDP 0x630
+#define EMAC_RX5HDP 0x634
+#define EMAC_RX6HDP 0x638
+#define EMAC_RX7HDP 0x63c
+#define EMAC_TX0CP 0x640
+#define EMAC_TX1CP 0x644
+#define EMAC_TX2CP 0x648
+#define EMAC_TX3CP 0x64c
+#define EMAC_TX4CP 0x650
+#define EMAC_TX5CP 0x654
+#define EMAC_TX6CP 0x658
+#define EMAC_TX7CP 0x65c
+#define EMAC_RX0CP 0x660
+#define EMAC_RX1CP 0x664
+#define EMAC_RX2CP 0x668
+#define EMAC_RX3CP 0x66c
+#define EMAC_RX4CP 0x670
+#define EMAC_RX5CP 0x674
+#define EMAC_RX6CP 0x678
+#define EMAC_RX7CP 0x67c
+
+/* EMAC Wrapper Registers */
+#define EMAC_EWRAP_IDVER 0x00
+#define EMAC_EWRAP_SOFTRESET 0x04
+#define EMAC_EWRAP_INTCTRL 0x0c
+#define EMAC_EWRAP_C0RXTHRESHEN 0x10
+#define EMAC_EWRAP_C0RXEN 0x14
+#define EMAC_EWRAP_C0TXEN 0x18
+#define EMAC_EWRAP_C0MISCEN 0x1c
+#define EMAC_EWRAP_C1RXTHRESHEN 0x20
+#define EMAC_EWRAP_C1RXEN 0x24
+#define EMAC_EWRAP_C1TXEN 0x28
+#define EMAC_EWRAP_C1MISCEN 0x2c
+#define EMAC_EWRAP_C2RXTHRESHEN 0x30
+#define EMAC_EWRAP_C2RXEN 0x34
+#define EMAC_EWRAP_C2TXEN 0x38
+#define EMAC_EWRAP_C2MISCEN 0x3c
+#define EMAC_EWRAP_C0RXTHRESHSTAT 0x40
+#define EMAC_EWRAP_C0RXSTAT 0x44
+#define EMAC_EWRAP_C0TXSTAT 0x48
+#define EMAC_EWRAP_C0MISCSTAT 0x4c
+#define EMAC_EWRAP_C1RXTHRESHSTAT 0x50
+#define EMAC_EWRAP_C1RXSTAT 0x54
+#define EMAC_EWRAP_C1TXSTAT 0x58
+#define EMAC_EWRAP_C1MISCSTAT 0x5c
+#define EMAC_EWRAP_C2RXTHRESHSTAT 0x60
+#define EMAC_EWRAP_C2RXSTAT 0x64
+#define EMAC_EWRAP_C2TXSTAT 0x68
+#define EMAC_EWRAP_C2MISCSTAT 0x6c
+#define EMAC_EWRAP_C0RXIMAX 0x70
+#define EMAC_EWRAP_C0TXIMAX 0x74
+#define EMAC_EWRAP_C1RXIMAX 0x78
+#define EMAC_EWRAP_C1TXIMAX 0x7c
+#define EMAC_EWRAP_C2RXIMAX 0x80
+#define EMAC_EWRAP_C2TXIMAX 0x84
+
+/* EMAC MDIO Registers */
+#define EMAC_MDIO_VERSION 0x00
+#define EMAC_MDIO_CONTROL 0x04
+#define EMAC_MDIO_ALIVE 0x08
+#define EMAC_MDIO_LINK 0x0c
+#define EMAC_MDIO_LINKINTRAW 0x10
+#define EMAC_MDIO_LINKINTMASKED 0x14
+#define EMAC_MDIO_USERINTRAW 0x20
+#define EMAC_MDIO_USERINTMASKED 0x24
+#define EMAC_MDIO_USERINTMASKSET 0x28
+#define EMAC_MDIO_USERINTMASKCLEAR 0x2c
+#define EMAC_MDIO_USERACCESS0 0x80
+#define EMAC_MDIO_USERPHYSEL0 0x84
+#define EMAC_MDIO_USERACCESS1 0x88
+#define EMAC_MDIO_USERPHYSEL1 0x8c
+
+#endif /* _DAVINCI_EMAC_H_ */
--
1.7.10.4
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