commit bafd803541aac79d12d1f855993607173da847ab
author Roy Zang <tie-fei.zang@freescale.com> Mon Oct 08 07:44:21 2012 +0000
committer Andy Fleming <afleming@freescale.com> Mon Oct 22 14:31:25 2012 -0500
tree e081e918e4d9129be8d56618d339a9f1d6ffac20
parent bcf7b3dfdecde8c9620474638661dab9dbaec6e7

fm/mEMAC: add mEMAC frame work

The multirate ethernet media access controller (mEMAC) interfaces to
10Gbps and below Ethernet/IEEE 802.3 networks via either RGMII/RMII
interfaces or XAUI/XFI/SGMII/QSGMII using the high-speed SerDes interface.

Signed-off-by: Sandeep Singh <Sandeep@freescale.com>
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

drivers/net/fm/memac_phy.c

diff --git a/drivers/net/fm/memac_phy.c b/drivers/net/fm/memac_phy.c
new file mode 100644
index 0000000..ea6118b
--- /dev/null
+++ b/drivers/net/fm/memac_phy.c
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *	Andy Fleming <afleming@freescale.com>
+ *	Roy Zang <tie-fei.zang@freescale.com>
+ *
+ * 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
+ * Some part is taken from tsec.c
+ */
+#include <common.h>
+#include <miiphy.h>
+#include <phy.h>
+#include <asm/io.h>
+#include <asm/fsl_memac.h>
+#include <fm_eth.h>
+
+/*
+ * Write value to the PHY for this device to the register at regnum, waiting
+ * until the write is done before it returns.  All PHY configuration has to be
+ * done through the TSEC1 MIIM regs
+ */
+int memac_mdio_write(struct mii_dev *bus, int port_addr, int dev_addr,
+			int regnum, u16 value)
+{
+	u32 mdio_ctl;
+	struct memac_mdio_controller *regs = bus->priv;
+	u32 c45 = 1; /* Default to 10G interface */
+
+	if (dev_addr == MDIO_DEVAD_NONE) {
+		c45 = 0; /* clause 22 */
+		dev_addr = regnum & 0x1f;
+		clrbits_be32(&regs->mdio_stat, MDIO_STAT_ENC);
+	} else {
+		setbits_be32(&regs->mdio_stat, MDIO_STAT_ENC);
+		setbits_be32(&regs->mdio_stat, MDIO_STAT_HOLD_15_CLK);
+	}
+
+	/* Wait till the bus is free */
+	while ((in_be32(&regs->mdio_stat)) & MDIO_STAT_BSY)
+		;
+
+	/* Set the port and dev addr */
+	mdio_ctl = MDIO_CTL_PORT_ADDR(port_addr) | MDIO_CTL_DEV_ADDR(dev_addr);
+	out_be32(&regs->mdio_ctl, mdio_ctl);
+
+	/* Set the register address */
+	if (c45)
+		out_be32(&regs->mdio_addr, regnum & 0xffff);
+
+	/* Wait till the bus is free */
+	while ((in_be32(&regs->mdio_stat)) & MDIO_STAT_BSY)
+		;
+
+	/* Write the value to the register */
+	out_be32(&regs->mdio_data, MDIO_DATA(value));
+
+	/* Wait till the MDIO write is complete */
+	while ((in_be32(&regs->mdio_data)) & MDIO_DATA_BSY)
+		;
+
+	return 0;
+}
+
+/*
+ * Reads from register regnum in the PHY for device dev, returning the value.
+ * Clears miimcom first.  All PHY configuration has to be done through the
+ * TSEC1 MIIM regs
+ */
+int memac_mdio_read(struct mii_dev *bus, int port_addr, int dev_addr,
+			int regnum)
+{
+	u32 mdio_ctl;
+	struct memac_mdio_controller *regs = bus->priv;
+	u32 c45 = 1;
+
+	if (dev_addr == MDIO_DEVAD_NONE) {
+		c45 = 0; /* clause 22 */
+		dev_addr = regnum & 0x1f;
+		clrbits_be32(&regs->mdio_stat, MDIO_STAT_ENC);
+	} else {
+		setbits_be32(&regs->mdio_stat, MDIO_STAT_ENC);
+		setbits_be32(&regs->mdio_stat, MDIO_STAT_HOLD_15_CLK);
+	}
+
+	/* Wait till the bus is free */
+	while ((in_be32(&regs->mdio_stat)) & MDIO_STAT_BSY)
+		;
+
+	/* Set the Port and Device Addrs */
+	mdio_ctl = MDIO_CTL_PORT_ADDR(port_addr) | MDIO_CTL_DEV_ADDR(dev_addr);
+	out_be32(&regs->mdio_ctl, mdio_ctl);
+
+	/* Set the register address */
+	if (c45)
+		out_be32(&regs->mdio_addr, regnum & 0xffff);
+
+	/* Wait till the bus is free */
+	while ((in_be32(&regs->mdio_stat)) & MDIO_STAT_BSY)
+		;
+
+	/* Initiate the read */
+	mdio_ctl |= MDIO_CTL_READ;
+	out_be32(&regs->mdio_ctl, mdio_ctl);
+
+	/* Wait till the MDIO write is complete */
+	while ((in_be32(&regs->mdio_data)) & MDIO_DATA_BSY)
+		;
+
+	/* Return all Fs if nothing was there */
+	if (in_be32(&regs->mdio_stat) & MDIO_STAT_RD_ER)
+		return 0xffff;
+
+	return in_be32(&regs->mdio_data) & 0xffff;
+}
+
+int memac_mdio_reset(struct mii_dev *bus)
+{
+	return 0;
+}
+
+int fm_memac_mdio_init(bd_t *bis, struct memac_mdio_info *info)
+{
+	struct mii_dev *bus = mdio_alloc();
+
+	if (!bus) {
+		printf("Failed to allocate FM TGEC MDIO bus\n");
+		return -1;
+	}
+
+	bus->read = memac_mdio_read;
+	bus->write = memac_mdio_write;
+	bus->reset = memac_mdio_reset;
+	sprintf(bus->name, info->name);
+
+	bus->priv = info->regs;
+
+	return mdio_register(bus);
+}