[U-Boot] [PATCH 3/7] fec_imx27: driver for FEC ethernet controller on i.MX27
Ilya Yanok
yanok at emcraft.com
Wed May 20 01:55:57 CEST 2009
Signed-off-by: Ilya Yanok <yanok at emcraft.com>
---
cpu/arm926ejs/mx27/generic.c | 10 +
drivers/net/Makefile | 1 +
drivers/net/fec_imx27.c | 705 ++++++++++++++++++++++++++++++++++++++++++
drivers/net/fec_imx27.h | 302 ++++++++++++++++++
include/netdev.h | 1 +
5 files changed, 1019 insertions(+), 0 deletions(-)
create mode 100644 drivers/net/fec_imx27.c
create mode 100644 drivers/net/fec_imx27.h
diff --git a/cpu/arm926ejs/mx27/generic.c b/cpu/arm926ejs/mx27/generic.c
index 850d5e6..e820d94 100644
--- a/cpu/arm926ejs/mx27/generic.c
+++ b/cpu/arm926ejs/mx27/generic.c
@@ -20,6 +20,7 @@
#include <common.h>
#include <div64.h>
+#include <netdev.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
@@ -159,6 +160,15 @@ int print_cpuinfo (void)
}
#endif
+int cpu_eth_init(bd_t *bis)
+{
+#if defined(CONFIG_FEC_IMX27)
+ return fecimx27_initialize(bis);
+#else
+ return 0;
+#endif
+}
+
void imx_gpio_mode(int gpio_mode)
{
struct gpio_regs *regs = (struct gpio_regs *)IMX_GPIO_BASE;
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index a360a50..ac68beb 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -34,6 +34,7 @@ COBJS-$(CONFIG_DRIVER_CS8900) += cs8900.o
COBJS-$(CONFIG_TULIP) += dc2114x.o
COBJS-$(CONFIG_DRIVER_DM9000) += dm9000x.o
COBJS-$(CONFIG_DNET) += dnet.o
+COBJS-$(CONFIG_FEC_IMX27) += fec_imx27.o
COBJS-$(CONFIG_E1000) += e1000.o
COBJS-$(CONFIG_EEPRO100) += eepro100.o
COBJS-$(CONFIG_ENC28J60) += enc28j60.o
diff --git a/drivers/net/fec_imx27.c b/drivers/net/fec_imx27.c
new file mode 100644
index 0000000..4ade348
--- /dev/null
+++ b/drivers/net/fec_imx27.c
@@ -0,0 +1,705 @@
+/*
+ * (C) Copyright 2009 Ilya Yanok, Emcraft Systems Ltd <yanok at emcraft.com>
+ * (C) Copyright 2008,2009 Eric Jarrige <eric.jarrige at armadeus.org>
+ * (C) Copyright 2008 Armadeus Systems nc
+ * (C) Copyright 2007 Pengutronix, Sascha Hauer <s.hauer at pengutronix.de>
+ * (C) Copyright 2007 Pengutronix, Juergen Beisert <j.beisert at pengutronix.de>
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <net.h>
+#include <miiphy.h>
+#include "fec_imx27.h"
+
+#include <asm/arch/clock.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifndef CONFIG_MII
+#error "CONFIG_MII has to be defined!"
+#endif
+
+#undef DEBUG
+
+struct nbuf {
+ uint8_t data[1500]; /**< actual data */
+ int length; /**< actual length */
+ int used; /**< buffer in use or not */
+ uint8_t head[16]; /**< MAC header(6 + 6 + 2) + 2(aligned) */
+};
+
+struct fec_priv gfec = {
+ .eth = (struct ethernet_regs *)IMX_FEC_BASE,
+ .xcv_type = MII100,
+ .rbd_base = NULL,
+ .rbd_index = 0,
+ .tbd_base = NULL,
+ .tbd_index = 0,
+ .bd = NULL,
+};
+
+/*
+ * MII-interface related functions
+ */
+static int fec_miiphy_read(char *dev, uint8_t phyAddr, uint8_t regAddr,
+ uint16_t *retVal)
+{
+ struct eth_device *edev = eth_get_dev_by_name(dev);
+ struct fec_priv *fec = (struct fec_priv *)edev->priv;
+
+ uint32_t reg; /* convenient holder for the PHY register */
+ uint32_t phy; /* convenient holder for the PHY */
+ uint32_t start;
+
+ /*
+ * reading from any PHY's register is done by properly
+ * programming the FEC's MII data register.
+ */
+ writel(FEC_IEVENT_MII, &fec->eth->ievent);
+ reg = regAddr << FEC_MII_DATA_RA_SHIFT;
+ phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
+
+ writel(FEC_MII_DATA_ST | FEC_MII_DATA_OP_RD | FEC_MII_DATA_TA |
+ phy | reg, &fec->eth->mii_data);
+
+ /*
+ * wait for the related interrupt
+ */
+ start = get_timer_masked();
+ while (!(readl(&fec->eth->ievent) & FEC_IEVENT_MII)) {
+ if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
+ printf("Read MDIO failed...\n");
+ return -1;
+ }
+ }
+
+ /*
+ * clear mii interrupt bit
+ */
+ writel(FEC_IEVENT_MII, &fec->eth->ievent);
+
+ /*
+ * it's now safe to read the PHY's register
+ */
+ *retVal = readl(&fec->eth->mii_data);
+ debug("fec_miiphy_read: phy: %02x reg:%02x val:%#x\n", phyAddr,
+ regAddr, *retVal);
+ return 0;
+}
+
+static int fec_miiphy_write(char *dev, uint8_t phyAddr, uint8_t regAddr,
+ uint16_t data)
+{
+ struct eth_device *edev = eth_get_dev_by_name(dev);
+ struct fec_priv *fec = (struct fec_priv *)edev->priv;
+
+ uint32_t reg; /* convenient holder for the PHY register */
+ uint32_t phy; /* convenient holder for the PHY */
+ uint32_t start;
+
+ reg = regAddr << FEC_MII_DATA_RA_SHIFT;
+ phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
+
+ writel(FEC_MII_DATA_ST | FEC_MII_DATA_OP_WR |
+ FEC_MII_DATA_TA | phy | reg | data, &fec->eth->mii_data);
+
+ /*
+ * wait for the MII interrupt
+ */
+ start = get_timer_masked();
+ while (!(readl(&fec->eth->ievent) & FEC_IEVENT_MII)) {
+ if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
+ printf("Write MDIO failed...\n");
+ return -1;
+ }
+ }
+
+ /*
+ * clear MII interrupt bit
+ */
+ writel(FEC_IEVENT_MII, &fec->eth->ievent);
+ debug("fec_miiphy_write: phy: %02x reg:%02x val:%#x\n", phyAddr,
+ regAddr, data);
+
+ return 0;
+}
+
+static int miiphy_restart_aneg(struct eth_device *dev)
+{
+ /*
+ * Wake up from sleep if necessary
+ * Reset PHY, then delay 300ns
+ */
+ miiphy_write(dev->name, 0, PHY_MIPGSR, 0x00FF);
+ miiphy_write(dev->name, 0, PHY_BMCR, PHY_BMCR_RESET);
+ udelay(1000);
+
+ /*
+ * Set the auto-negotiation advertisement register bits
+ */
+ miiphy_write(dev->name, 0, PHY_ANAR, 0x1e0);
+ miiphy_write(dev->name, 0, PHY_BMCR, PHY_BMCR_AUTON | PHY_BMCR_RST_NEG);
+
+ return 0;
+}
+
+static int miiphy_wait_aneg(struct eth_device *dev)
+{
+ uint32_t start;
+ uint16_t status;
+
+ /*
+ * Wait for AN completion
+ */
+ start = get_timer_masked(); /* get_time_ns(); */
+ do {
+ if (get_timer(start) > (CONFIG_SYS_HZ * 5)) {
+ printf("%s: Autonegotiation timeout\n", dev->name);
+ return -1;
+ }
+
+ if (miiphy_read(dev->name, 0, PHY_BMSR, &status)) {
+ printf("%s: Autonegotiation failed. status: 0x%04x\n",
+ dev->name, status);
+ return -1;
+ }
+ } while (!(status & PHY_BMSR_LS));
+
+ return 0;
+}
+static int fec_rx_task_enable(struct fec_priv *fec)
+{
+ writel(1 << 24, &fec->eth->r_des_active);
+ return 0;
+}
+
+static int fec_rx_task_disable(struct fec_priv *fec)
+{
+ return 0;
+}
+
+static int fec_tx_task_enable(struct fec_priv *fec)
+{
+ writel(1 << 24, &fec->eth->x_des_active);
+ return 0;
+}
+
+static int fec_tx_task_disable(struct fec_priv *fec)
+{
+ return 0;
+}
+
+/**
+ * Initialize receive task's buffer descriptors
+ * @param[in] fec all we know about the device yet
+ * @param[in] count receive buffer count to be allocated
+ * @param[in] size size of each receive buffer
+ * @return 0 on success
+ *
+ * For this task we need additional memory for the data buffers. And each
+ * data buffer requires some alignment. Thy must be aligned to a specific
+ * boundary each (DB_DATA_ALIGNMENT).
+ */
+static int fec_rbd_init(struct fec_priv *fec, int count, int size, int once)
+{
+ int ix;
+ uint32_t p = 0;
+
+ if (!once) {
+ /* reserve data memory and consider alignment */
+ p = (uint32_t)malloc(size * count + DB_DATA_ALIGNMENT);
+ memset((void *)p, 0, size * count + DB_DATA_ALIGNMENT);
+ p += DB_DATA_ALIGNMENT-1;
+ p &= ~(DB_DATA_ALIGNMENT-1);
+ }
+
+ for (ix = 0; ix < count; ix++) {
+ if (!once) {
+ writel(p, &fec->rbd_base[ix].data_pointer);
+ p += size;
+ }
+ writew(FEC_RBD_EMPTY, &fec->rbd_base[ix].status);
+ writew(0, &fec->rbd_base[ix].data_length);
+ }
+ /*
+ * mark the last RBD to close the ring
+ */
+ writew(FEC_RBD_WRAP | FEC_RBD_EMPTY, &fec->rbd_base[ix - 1].status);
+ fec->rbd_index = 0;
+
+ return 0;
+}
+
+/**
+ * Initialize transmit task's buffer descriptors
+ * @param[in] fec all we know about the device yet
+ *
+ * Transmit buffers are created externally. We only have to init the BDs here.\n
+ * Note: There is a race condition in the hardware. When only one BD is in
+ * use it must be marked with the WRAP bit to use it for every transmitt.
+ * This bit in combination with the READY bit results into double transmit
+ * of each data buffer. It seems the state machine checks READY earlier then
+ * resetting it after the first transfer.
+ * Using two BDs solves this issue.
+ */
+static void fec_tbd_init(struct fec_priv *fec)
+{
+ writew(0x0000, &fec->tbd_base[0].status);
+ writew(FEC_TBD_WRAP, &fec->tbd_base[1].status);
+ fec->tbd_index = 0;
+}
+
+/**
+ * Mark the given read buffer descriptor as free
+ * @param[in] last 1 if this is the last buffer descriptor in the chain, else 0
+ * @param[in] pRbd buffer descriptor to mark free again
+ */
+static void fec_rbd_clean(int last, struct fec_bd *pRbd)
+{
+ /*
+ * Reset buffer descriptor as empty
+ */
+ if (last)
+ writew(FEC_RBD_WRAP | FEC_RBD_EMPTY, &pRbd->status);
+ else
+ writew(FEC_RBD_EMPTY, &pRbd->status);
+ /*
+ * no data in it
+ */
+ writew(0, &pRbd->data_length);
+}
+
+static int fec_get_hwaddr(struct eth_device *dev, unsigned char *mac)
+{
+ struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE;
+ int i;
+
+ for (i = 0; i < 6; i++)
+ mac[6-1-i] = readl(&iim->IIM_BANK_AREA0[IIM0_MAC + i]);
+
+ return is_valid_ether_addr(mac);
+}
+
+static int fec_set_hwaddr(struct eth_device *dev, unsigned char *mac)
+{
+ struct fec_priv *fec = (struct fec_priv *)dev->priv;
+
+ writel(0, &fec->eth->iaddr1);
+ writel(0, &fec->eth->iaddr2);
+ writel(0, &fec->eth->gaddr1);
+ writel(0, &fec->eth->gaddr2);
+
+ /*
+ * Set physical address
+ */
+ writel((mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3],
+ &fec->eth->paddr1);
+ writel((mac[4] << 24) + (mac[5] << 16) + 0x8808, &fec->eth->paddr2);
+
+ return 0;
+}
+
+/**
+ * Start the FEC engine
+ * @param[in] dev Our device to handle
+ */
+static int fec_open(struct eth_device *edev)
+{
+ struct fec_priv *fec = (struct fec_priv *)edev->priv;
+
+ debug("fec_open: fec_open(dev)\n");
+ /* full-duplex, heartbeat disabled */
+ writel(1 << 2, &fec->eth->x_cntrl);
+ fec->rbd_index = 0;
+
+ /*
+ * Enable FEC-Lite controller
+ */
+ writel(FEC_ECNTRL_ETHER_EN, &fec->eth->ecntrl);
+
+ miiphy_wait_aneg(edev);
+ miiphy_speed(edev->name, 0);
+ miiphy_duplex(edev->name, 0);
+
+ /*
+ * Enable SmartDMA receive task
+ */
+ fec_rx_task_enable(fec);
+
+ udelay(100000);
+ return 0;
+}
+
+static int fec_init(struct eth_device *dev, bd_t* bd)
+{
+ static int once;
+ uint32_t base;
+ struct fec_priv *fec = (struct fec_priv *)dev->priv;
+
+ if (!once) {
+ /*
+ * reserve memory for both buffer descriptor chains at once
+ * Datasheet forces the startaddress of each chain is 16 byte
+ * aligned
+ */
+ base = (uint32_t)malloc((2 + FEC_RBD_NUM) *
+ sizeof(struct fec_bd) + DB_ALIGNMENT);
+ memset((void *)base, 0, (2 + FEC_RBD_NUM) *
+ sizeof(struct fec_bd) + DB_ALIGNMENT);
+ base += (DB_ALIGNMENT-1);
+ base &= ~(DB_ALIGNMENT-1);
+
+ fec->rbd_base = (struct fec_bd *)base;
+
+ base += FEC_RBD_NUM * sizeof(struct fec_bd);
+
+ fec->tbd_base = (struct fec_bd *)base;
+ }
+
+ /*
+ * Set interrupt mask register
+ */
+ writel(0x00000000, &fec->eth->imask);
+
+ /*
+ * Clear FEC-Lite interrupt event register(IEVENT)
+ */
+ writel(0xffffffff, &fec->eth->ievent);
+
+
+ /*
+ * Set FEC-Lite receive control register(R_CNTRL):
+ */
+ if (fec->xcv_type == SEVENWIRE) {
+ /*
+ * Frame length=1518; 7-wire mode
+ */
+ writel(0x05ee0020, &fec->eth->r_cntrl); /* FIXME 0x05ee0000 */
+ } else {
+ /*
+ * Frame length=1518; MII mode;
+ */
+ writel(0x05ee0024, &fec->eth->r_cntrl); /* FIXME 0x05ee0004 */
+ /*
+ * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
+ * and do not drop the Preamble.
+ */
+ writel((((imx_get_ahbclk() / 1000000) + 2) / 5) << 1,
+ &fec->eth->mii_speed);
+ debug("fec_init: mii_speed %#lx\n",
+ (((imx_get_ahbclk() / 1000000) + 2) / 5) << 1);
+ }
+ /*
+ * Set Opcode/Pause Duration Register
+ */
+ writel(0x00010020, &fec->eth->op_pause); /* FIXME 0xffff0020; */
+ writel(0x2, &fec->eth->x_wmrk);
+ /*
+ * Set multicast address filter
+ */
+ writel(0x00000000, &fec->eth->gaddr1);
+ writel(0x00000000, &fec->eth->gaddr2);
+
+
+ /* clear MIB RAM */
+ long *mib_ptr = (long *)(IMX_FEC_BASE + 0x200);
+ while (mib_ptr <= (long *)(IMX_FEC_BASE + 0x2FC))
+ *mib_ptr++ = 0;
+
+ /* FIFO receive start register */
+ writel(0x520, &fec->eth->r_fstart);
+
+ /* size and address of each buffer */
+ writel(FEC_MAX_PKT_SIZE, &fec->eth->emrbr);
+ writel((uint32_t)fec->tbd_base, &fec->eth->etdsr);
+ writel((uint32_t)fec->rbd_base, &fec->eth->erdsr);
+
+ /*
+ * Initialize RxBD/TxBD rings
+ */
+ fec_rbd_init(fec, FEC_RBD_NUM, FEC_MAX_PKT_SIZE, once);
+ fec_tbd_init(fec);
+
+
+ if (fec->xcv_type != SEVENWIRE)
+ miiphy_restart_aneg(dev);
+
+ once = 1; /* malloc done now (and once) */
+
+ fec_open(dev);
+ return 0;
+}
+
+/**
+ * Halt the FEC engine
+ * @param[in] dev Our device to handle
+ */
+static void fec_halt(struct eth_device *dev)
+{
+ struct fec_priv *fec = &gfec;
+ int counter = 0xffff;
+
+ /*
+ * issue graceful stop command to the FEC transmitter if necessary
+ */
+ writel(FEC_ECNTRL_RESET | readl(&fec->eth->x_cntrl),
+ &fec->eth->x_cntrl);
+
+ debug("eth_halt: wait for stop regs\n");
+ /*
+ * wait for graceful stop to register
+ */
+ while ((counter--) && (!(readl(&fec->eth->ievent) & FEC_IEVENT_GRA)))
+ ; /* FIXME ensure time */
+
+ /*
+ * Disable SmartDMA tasks
+ */
+ fec_tx_task_disable(fec);
+ fec_rx_task_disable(fec);
+
+ /*
+ * Disable the Ethernet Controller
+ * Note: this will also reset the BD index counter!
+ */
+ writel(0, &fec->eth->ecntrl);
+ fec->rbd_index = 0;
+ fec->tbd_index = 0;
+ debug("eth_halt: done\n");
+}
+
+/**
+ * Transmit one frame
+ * @param[in] dev Our ethernet device to handle
+ * @param[in] packet Pointer to the data to be transmitted
+ * @param[in] length Data count in bytes
+ * @return 0 on success
+ */
+static int fec_send(struct eth_device *dev, volatile void* packet, int length)
+{
+ unsigned int status;
+
+ /*
+ * This routine transmits one frame. This routine only accepts
+ * 6-byte Ethernet addresses.
+ */
+ struct fec_priv *fec = (struct fec_priv *)dev->priv;
+
+ /*
+ * Check for valid length of data.
+ */
+ if ((length > 1500) || (length <= 0)) {
+ printf("Payload (%d) to large!\n", length);
+ return -1;
+ }
+
+ /*
+ * Setup the transmit buffer
+ * Note: We are always using the first buffer for transmission,
+ * the second will be empty and only used to stop the DMA engine
+ */
+ writew(length, &fec->tbd_base[fec->tbd_index].data_length);
+ writel((uint32_t)packet, &fec->tbd_base[fec->tbd_index].data_pointer);
+ /*
+ * update BD's status now
+ * This block:
+ * - is always the last in a chain (means no chain)
+ * - should transmitt the CRC
+ * - might be the last BD in the list, so the address counter should
+ * wrap (-> keep the WRAP flag)
+ */
+ status = readw(&fec->tbd_base[fec->tbd_index].status) & FEC_TBD_WRAP;
+ status |= FEC_TBD_LAST | FEC_TBD_TC | FEC_TBD_READY;
+ writew(status, &fec->tbd_base[fec->tbd_index].status);
+
+ /*
+ * Enable SmartDMA transmit task
+ */
+ fec_tx_task_enable(fec);
+
+ /*
+ * wait until frame is sent .
+ */
+ while (readw(&fec->tbd_base[fec->tbd_index].status) & FEC_TBD_READY) {
+ /* FIXME: Timeout */
+ }
+ debug("fec_send: status 0x%x index %d\n",
+ readw(&fec->tbd_base[fec->tbd_index].status),
+ fec->tbd_index);
+ /* for next transmission use the other buffer */
+ if (fec->tbd_index)
+ fec->tbd_index = 0;
+ else
+ fec->tbd_index = 1;
+
+ return 0;
+}
+
+/**
+ * Pull one frame from the card
+ * @param[in] dev Our ethernet device to handle
+ * @return Length of packet read
+ */
+static int fec_recv(struct eth_device *dev)
+{
+ struct fec_priv *fec = (struct fec_priv *)dev->priv;
+ struct fec_bd *rbd = &fec->rbd_base[fec->rbd_index];
+ unsigned long ievent;
+ int frame_length, len = 0;
+ struct nbuf *frame;
+ uint16_t bd_status;
+ uchar buff[FEC_MAX_PKT_SIZE];
+
+ /*
+ * Check if any critical events have happened
+ */
+ ievent = readl(&fec->eth->ievent);
+ writel(ievent, &fec->eth->ievent);
+ debug("fec_recv: ievent 0x%x\n", ievent);
+ if (ievent & FEC_IEVENT_BABR) {
+ fec_halt(dev);
+ fec_init(dev, fec->bd);
+ printf("some error: 0x%08lx\n", ievent);
+ return 0;
+ }
+ if (ievent & FEC_IEVENT_HBERR) {
+ /* Heartbeat error */
+ writel(0x00000001 | readl(&fec->eth->x_cntrl),
+ &fec->eth->x_cntrl);
+ }
+ if (ievent & FEC_IEVENT_GRA) {
+ /* Graceful stop complete */
+ if (readl(&fec->eth->x_cntrl) & 0x00000001) {
+ fec_halt(dev);
+ writel(~0x00000001 & readl(&fec->eth->x_cntrl),
+ &fec->eth->x_cntrl);
+ fec_init(dev, fec->bd);
+ }
+ }
+
+ /*
+ * ensure reading the right buffer status
+ */
+ bd_status = readw(&rbd->status);
+ debug("fec_recv: status 0x%x\n", bd_status);
+
+ if (!(bd_status & FEC_RBD_EMPTY)) {
+ if ((bd_status & FEC_RBD_LAST) && !(bd_status & FEC_RBD_ERR) &&
+ ((readw(&rbd->data_length) - 4) > 14)) {
+ /*
+ * Get buffer address and size
+ */
+ frame = (struct nbuf *)readl(&rbd->data_pointer);
+ frame_length = readw(&rbd->data_length) - 4;
+ /*
+ * Fill the buffer and pass it to upper layers
+ */
+ memcpy(buff, frame->data, frame_length);
+ NetReceive(buff, frame_length);
+ len = frame_length;
+ } else {
+ if (bd_status & FEC_RBD_ERR)
+ printf("error frame: 0x%08lx 0x%08x\n",
+ (ulong)rbd->data_pointer,
+ bd_status);
+ }
+ /*
+ * free the current buffer, restart the engine
+ * and move forward to the next buffer
+ */
+ fec_rbd_clean(fec->rbd_index == (FEC_RBD_NUM - 1) ? 1 : 0, rbd);
+ fec_rx_task_enable(fec);
+ fec->rbd_index = (fec->rbd_index + 1) % FEC_RBD_NUM;
+ }
+ debug("fec_recv: stop\n");
+
+ return len;
+}
+
+static int fec_probe(bd_t *bd)
+{
+ struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
+ struct eth_device *edev;
+ struct fec_priv *fec = &gfec;
+ unsigned char ethaddr_str[20];
+ unsigned char ethaddr[6];
+ char *tmp = getenv("ethaddr");
+ char *end;
+
+ /* enable FEC clock */
+ writel(readl(&pll->PCCR1) | PCCR1_HCLK_FEC, &pll->PCCR1);
+ writel(readl(&pll->PCCR0) | PCCR0_FEC_EN, &pll->PCCR0);
+
+ /* create and fill edev struct */
+ edev = (struct eth_device *)malloc(sizeof(struct eth_device));
+ edev->priv = fec;
+ edev->init = fec_init;
+ edev->send = fec_send;
+ edev->recv = fec_recv;
+ edev->halt = fec_halt;
+
+ fec->eth = (struct ethernet_regs *)IMX_FEC_BASE;
+ fec->bd = bd;
+
+ /* Reset chip. */
+ writel(FEC_ECNTRL_RESET, &fec->eth->ecntrl);
+ while (readl(&fec->eth->ecntrl) & 1)
+ udelay(10);
+
+ fec->xcv_type = MII100;
+
+ sprintf(edev->name, "FEC ETHERNET");
+
+ miiphy_register(edev->name, fec_miiphy_read, fec_miiphy_write);
+
+ eth_register(edev);
+
+ if ((NULL != tmp) && (12 <= strlen(tmp))) {
+ int i;
+ /* convert MAC from string to int */
+ for (i = 0; i < 6; i++) {
+ ethaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
+ if (tmp)
+ tmp = (*end) ? end + 1 : end;
+ }
+ } else if (fec_get_hwaddr(edev, ethaddr) == 0) {
+ printf("got MAC address from EEPROM: %pM\n", ethaddr);
+ setenv("ethaddr", (char *)ethaddr_str);
+ }
+ memcpy(edev->enetaddr, ethaddr, 6);
+ fec_set_hwaddr(edev, ethaddr);
+
+ return 0;
+}
+
+int fecimx27_initialize(bd_t *bd)
+{
+ int lout = 1;
+ static int once;
+
+ if (!once) {
+ debug("eth_init: fec_probe(bd)\n");
+ lout = fec_probe(bd);
+ once = 1;
+ }
+ return lout;
+}
+
diff --git a/drivers/net/fec_imx27.h b/drivers/net/fec_imx27.h
new file mode 100644
index 0000000..926c0d7
--- /dev/null
+++ b/drivers/net/fec_imx27.h
@@ -0,0 +1,302 @@
+/*
+ * (C) Copyright 2009 Ilya Yanok, Emcraft Systems Ltd <yanok at emcraft.com>
+ * (C) Copyright 2008 Armadeus Systems, nc
+ * (C) Copyright 2008 Eric Jarrige <eric.jarrige at armadeus.org>
+ * (C) Copyright 2007 Pengutronix, Sascha Hauer <s.hauer at pengutronix.de>
+ * (C) Copyright 2007 Pengutronix, Juergen Beisert <j.beisert at pengutronix.de>
+ *
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+ *
+ * This file is based on mpc4200fec.h
+ * (C) Copyright Motorola, Inc., 2000
+ *
+ * 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
+ *
+ */
+
+
+#ifndef __IMX27_FEC_H
+#define __IMX27_FEC_H
+
+/**
+ * Layout description of the FEC
+ */
+struct ethernet_regs {
+
+/* [10:2]addr = 00 */
+
+/* Control and status Registers (offset 000-1FF) */
+
+ uint32_t RES0[1]; /* MBAR_ETH + 0x000 */
+ uint32_t ievent; /* MBAR_ETH + 0x004 */
+ uint32_t imask; /* MBAR_ETH + 0x008 */
+
+ uint32_t RES1[1]; /* MBAR_ETH + 0x00C */
+ uint32_t r_des_active; /* MBAR_ETH + 0x010 */
+ uint32_t x_des_active; /* MBAR_ETH + 0x014 */
+ uint32_t RES2[3]; /* MBAR_ETH + 0x018-20 */
+ uint32_t ecntrl; /* MBAR_ETH + 0x024 */
+
+ uint32_t RES3[6]; /* MBAR_ETH + 0x028-03C */
+ uint32_t mii_data; /* MBAR_ETH + 0x040 */
+ uint32_t mii_speed; /* MBAR_ETH + 0x044 */
+ uint32_t RES4[7]; /* MBAR_ETH + 0x048-60 */
+ uint32_t mib_control; /* MBAR_ETH + 0x064 */
+
+ uint32_t RES5[7]; /* MBAR_ETH + 0x068-80 */
+ uint32_t r_cntrl; /* MBAR_ETH + 0x084 */
+ uint32_t RES6[15]; /* MBAR_ETH + 0x088-C0 */
+ uint32_t x_cntrl; /* MBAR_ETH + 0x0C4 */
+ uint32_t RES7[7]; /* MBAR_ETH + 0x0C8-E0 */
+ uint32_t paddr1; /* MBAR_ETH + 0x0E4 */
+ uint32_t paddr2; /* MBAR_ETH + 0x0E8 */
+ uint32_t op_pause; /* MBAR_ETH + 0x0EC */
+
+ uint32_t RES8[10]; /* MBAR_ETH + 0x0F0-114 */
+ uint32_t iaddr1; /* MBAR_ETH + 0x118 */
+ uint32_t iaddr2; /* MBAR_ETH + 0x11C */
+ uint32_t gaddr1; /* MBAR_ETH + 0x120 */
+ uint32_t gaddr2; /* MBAR_ETH + 0x124 */
+ uint32_t RES9[7]; /* MBAR_ETH + 0x128-140 */
+
+ uint32_t x_wmrk; /* MBAR_ETH + 0x144 */
+ uint32_t RES10[1]; /* MBAR_ETH + 0x148 */
+ uint32_t r_bound; /* MBAR_ETH + 0x14C */
+ uint32_t r_fstart; /* MBAR_ETH + 0x150 */
+ uint32_t RES11[11]; /* MBAR_ETH + 0x154-17C */
+ uint32_t erdsr; /* MBAR_ETH + 0x180 */
+ uint32_t etdsr; /* MBAR_ETH + 0x184 */
+ uint32_t emrbr; /* MBAR_ETH + 0x188 */
+ uint32_t RES12[29]; /* MBAR_ETH + 0x18C-1FC */
+
+/* MIB COUNTERS (Offset 200-2FF) */
+
+ uint32_t rmon_t_drop; /* MBAR_ETH + 0x200 */
+ uint32_t rmon_t_packets; /* MBAR_ETH + 0x204 */
+ uint32_t rmon_t_bc_pkt; /* MBAR_ETH + 0x208 */
+ uint32_t rmon_t_mc_pkt; /* MBAR_ETH + 0x20C */
+ uint32_t rmon_t_crc_align; /* MBAR_ETH + 0x210 */
+ uint32_t rmon_t_undersize; /* MBAR_ETH + 0x214 */
+ uint32_t rmon_t_oversize; /* MBAR_ETH + 0x218 */
+ uint32_t rmon_t_frag; /* MBAR_ETH + 0x21C */
+ uint32_t rmon_t_jab; /* MBAR_ETH + 0x220 */
+ uint32_t rmon_t_col; /* MBAR_ETH + 0x224 */
+ uint32_t rmon_t_p64; /* MBAR_ETH + 0x228 */
+ uint32_t rmon_t_p65to127; /* MBAR_ETH + 0x22C */
+ uint32_t rmon_t_p128to255; /* MBAR_ETH + 0x230 */
+ uint32_t rmon_t_p256to511; /* MBAR_ETH + 0x234 */
+ uint32_t rmon_t_p512to1023; /* MBAR_ETH + 0x238 */
+ uint32_t rmon_t_p1024to2047; /* MBAR_ETH + 0x23C */
+ uint32_t rmon_t_p_gte2048; /* MBAR_ETH + 0x240 */
+ uint32_t rmon_t_octets; /* MBAR_ETH + 0x244 */
+ uint32_t ieee_t_drop; /* MBAR_ETH + 0x248 */
+ uint32_t ieee_t_frame_ok; /* MBAR_ETH + 0x24C */
+ uint32_t ieee_t_1col; /* MBAR_ETH + 0x250 */
+ uint32_t ieee_t_mcol; /* MBAR_ETH + 0x254 */
+ uint32_t ieee_t_def; /* MBAR_ETH + 0x258 */
+ uint32_t ieee_t_lcol; /* MBAR_ETH + 0x25C */
+ uint32_t ieee_t_excol; /* MBAR_ETH + 0x260 */
+ uint32_t ieee_t_macerr; /* MBAR_ETH + 0x264 */
+ uint32_t ieee_t_cserr; /* MBAR_ETH + 0x268 */
+ uint32_t ieee_t_sqe; /* MBAR_ETH + 0x26C */
+ uint32_t t_fdxfc; /* MBAR_ETH + 0x270 */
+ uint32_t ieee_t_octets_ok; /* MBAR_ETH + 0x274 */
+
+ uint32_t RES13[2]; /* MBAR_ETH + 0x278-27C */
+ uint32_t rmon_r_drop; /* MBAR_ETH + 0x280 */
+ uint32_t rmon_r_packets; /* MBAR_ETH + 0x284 */
+ uint32_t rmon_r_bc_pkt; /* MBAR_ETH + 0x288 */
+ uint32_t rmon_r_mc_pkt; /* MBAR_ETH + 0x28C */
+ uint32_t rmon_r_crc_align; /* MBAR_ETH + 0x290 */
+ uint32_t rmon_r_undersize; /* MBAR_ETH + 0x294 */
+ uint32_t rmon_r_oversize; /* MBAR_ETH + 0x298 */
+ uint32_t rmon_r_frag; /* MBAR_ETH + 0x29C */
+ uint32_t rmon_r_jab; /* MBAR_ETH + 0x2A0 */
+
+ uint32_t rmon_r_resvd_0; /* MBAR_ETH + 0x2A4 */
+
+ uint32_t rmon_r_p64; /* MBAR_ETH + 0x2A8 */
+ uint32_t rmon_r_p65to127; /* MBAR_ETH + 0x2AC */
+ uint32_t rmon_r_p128to255; /* MBAR_ETH + 0x2B0 */
+ uint32_t rmon_r_p256to511; /* MBAR_ETH + 0x2B4 */
+ uint32_t rmon_r_p512to1023; /* MBAR_ETH + 0x2B8 */
+ uint32_t rmon_r_p1024to2047; /* MBAR_ETH + 0x2BC */
+ uint32_t rmon_r_p_gte2048; /* MBAR_ETH + 0x2C0 */
+ uint32_t rmon_r_octets; /* MBAR_ETH + 0x2C4 */
+ uint32_t ieee_r_drop; /* MBAR_ETH + 0x2C8 */
+ uint32_t ieee_r_frame_ok; /* MBAR_ETH + 0x2CC */
+ uint32_t ieee_r_crc; /* MBAR_ETH + 0x2D0 */
+ uint32_t ieee_r_align; /* MBAR_ETH + 0x2D4 */
+ uint32_t r_macerr; /* MBAR_ETH + 0x2D8 */
+ uint32_t r_fdxfc; /* MBAR_ETH + 0x2DC */
+ uint32_t ieee_r_octets_ok; /* MBAR_ETH + 0x2E0 */
+
+ uint32_t RES14[6]; /* MBAR_ETH + 0x2E4-2FC */
+
+ uint32_t RES15[64]; /* MBAR_ETH + 0x300-3FF */
+};
+
+#define FEC_IEVENT_HBERR 0x80000000
+#define FEC_IEVENT_BABR 0x40000000
+#define FEC_IEVENT_BABT 0x20000000
+#define FEC_IEVENT_GRA 0x10000000
+#define FEC_IEVENT_TXF 0x08000000
+#define FEC_IEVENT_TXB 0x04000000
+#define FEC_IEVENT_RXF 0x02000000
+#define FEC_IEVENT_RXB 0x01000000
+#define FEC_IEVENT_MII 0x00800000
+#define FEC_IEVENT_EBERR 0x00400000
+#define FEC_IEVENT_LC 0x00200000
+#define FEC_IEVENT_RL 0x00100000
+#define FEC_IEVENT_UN 0x00080000
+
+#define FEC_IMASK_HBERR 0x80000000
+#define FEC_IMASK_BABR 0x40000000
+#define FEC_IMASKT_BABT 0x20000000
+#define FEC_IMASK_GRA 0x10000000
+#define FEC_IMASKT_TXF 0x08000000
+#define FEC_IMASK_TXB 0x04000000
+#define FEC_IMASKT_RXF 0x02000000
+#define FEC_IMASK_RXB 0x01000000
+#define FEC_IMASK_MII 0x00800000
+#define FEC_IMASK_EBERR 0x00400000
+#define FEC_IMASK_LC 0x00200000
+#define FEC_IMASKT_RL 0x00100000
+#define FEC_IMASK_UN 0x00080000
+
+
+#define FEC_RCNTRL_MAX_FL_SHIFT 16
+#define FEC_RCNTRL_LOOP 0x00000001
+#define FEC_RCNTRL_DRT 0x00000002
+#define FEC_RCNTRL_MII_MODE 0x00000004
+#define FEC_RCNTRL_PROM 0x00000008
+#define FEC_RCNTRL_BC_REJ 0x00000010
+#define FEC_RCNTRL_FCE 0x00000020
+
+#define FEC_TCNTRL_GTS 0x00000001
+#define FEC_TCNTRL_HBC 0x00000002
+#define FEC_TCNTRL_FDEN 0x00000004
+#define FEC_TCNTRL_TFC_PAUSE 0x00000008
+#define FEC_TCNTRL_RFC_PAUSE 0x00000010
+
+#define FEC_ECNTRL_RESET 0x00000001 /* reset the FEC */
+#define FEC_ECNTRL_ETHER_EN 0x00000002 /* enable the FEC */
+
+/**
+ * @brief Descriptor buffer alignment
+ *
+ * i.MX27 requires a 16 byte alignment (but for the first element only)
+ */
+#define DB_ALIGNMENT 16
+
+/**
+ * @brief Data buffer alignment
+ *
+ * i.MX27 requires a four byte alignment for transmit and 16 bits
+ * alignment for receive so take 16
+ * Note: Valid for member data_pointer in struct buffer_descriptor
+ */
+#define DB_DATA_ALIGNMENT 16
+
+/**
+ * @brief Receive & Transmit Buffer Descriptor definitions
+ *
+ * Note: The first BD must be aligned (see DB_ALIGNMENT)
+ */
+struct fec_bd {
+ uint16_t data_length; /* payload's length in bytes */
+ uint16_t status; /* BD's staus (see datasheet) */
+ uint32_t data_pointer; /* payload's buffer address */
+};
+
+/**
+ * Supported phy types on this platform
+ */
+enum xceiver_type {
+ SEVENWIRE, /* 7-wire */
+ MII10, /* MII 10Mbps */
+ MII100 /* MII 100Mbps */
+};
+
+/**
+ * @brief i.MX27-FEC private structure
+ */
+struct fec_priv {
+ struct ethernet_regs *eth; /* pointer to register'S base */
+ enum xceiver_type xcv_type; /* transceiver type */
+ struct fec_bd *rbd_base; /* RBD ring */
+ int rbd_index; /* next receive BD to read */
+ struct fec_bd *tbd_base; /* TBD ring */
+ int tbd_index; /* next transmit BD to write */
+ bd_t *bd;
+};
+
+/**
+ * @brief Numbers of buffer descriptors for receiving
+ *
+ * The number defines the stocked memory buffers for the receiving task.
+ * Larger values makes no sense in this limited environment.
+ */
+#define FEC_RBD_NUM 64
+
+/**
+ * @brief Define the ethernet packet size limit in memory
+ *
+ * Note: Do not shrink this number. This will force the FEC to spread larger
+ * frames in more than one BD. This is nothing to worry about, but the current
+ * driver can't handle it.
+ */
+#define FEC_MAX_PKT_SIZE 1536
+
+/* Receive BD status bits */
+#define FEC_RBD_EMPTY 0x8000 /* Receive BD status: Buffer is empty */
+#define FEC_RBD_WRAP 0x2000 /* Receive BD status: Last BD in ring */
+/* Receive BD status: Buffer is last in frame (useless here!) */
+#define FEC_RBD_LAST 0x0800
+#define FEC_RBD_MISS 0x0100 /* Receive BD status: Miss bit for prom mode */
+/* Receive BD status: The received frame is broadcast frame */
+#define FEC_RBD_BC 0x0080
+/* Receive BD status: The received frame is multicast frame */
+#define FEC_RBD_MC 0x0040
+#define FEC_RBD_LG 0x0020 /* Receive BD status: Frame length violation */
+#define FEC_RBD_NO 0x0010 /* Receive BD status: Nonoctet align frame */
+#define FEC_RBD_CR 0x0004 /* Receive BD status: CRC error */
+#define FEC_RBD_OV 0x0002 /* Receive BD status: Receive FIFO overrun */
+#define FEC_RBD_TR 0x0001 /* Receive BD status: Frame is truncated */
+#define FEC_RBD_ERR (FEC_RBD_LG | FEC_RBD_NO | FEC_RBD_CR | \
+ FEC_RBD_OV | FEC_RBD_TR)
+
+/* Transmit BD status bits */
+#define FEC_TBD_READY 0x8000 /* Tansmit BD status: Buffer is ready */
+#define FEC_TBD_WRAP 0x2000 /* Tansmit BD status: Mark as last BD in ring */
+#define FEC_TBD_LAST 0x0800 /* Tansmit BD status: Buffer is last in frame */
+#define FEC_TBD_TC 0x0400 /* Tansmit BD status: Transmit the CRC */
+#define FEC_TBD_ABC 0x0200 /* Tansmit BD status: Append bad CRC */
+
+/* MII-related definitios */
+#define FEC_MII_DATA_ST 0x40000000 /* Start of frame delimiter */
+#define FEC_MII_DATA_OP_RD 0x20000000 /* Perform a read operation */
+#define FEC_MII_DATA_OP_WR 0x10000000 /* Perform a write operation */
+#define FEC_MII_DATA_PA_MSK 0x0f800000 /* PHY Address field mask */
+#define FEC_MII_DATA_RA_MSK 0x007c0000 /* PHY Register field mask */
+#define FEC_MII_DATA_TA 0x00020000 /* Turnaround */
+#define FEC_MII_DATA_DATAMSK 0x0000ffff /* PHY data field */
+
+#define FEC_MII_DATA_RA_SHIFT 18 /* MII Register address bits */
+#define FEC_MII_DATA_PA_SHIFT 23 /* MII PHY address bits */
+
+#endif /* __IMX27_FEC_H */
diff --git a/include/netdev.h b/include/netdev.h
index 63cf730..2d999ad 100644
--- a/include/netdev.h
+++ b/include/netdev.h
@@ -49,6 +49,7 @@ int e1000_initialize(bd_t *bis);
int eepro100_initialize(bd_t *bis);
int eth_3com_initialize (bd_t * bis);
int fec_initialize (bd_t *bis);
+int fecimx27_initialize (bd_t *bis);
int greth_initialize(bd_t *bis);
void gt6426x_eth_initialize(bd_t *bis);
int inca_switch_initialize(bd_t *bis);
--
1.6.0.6
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