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path: root/drivers/net/fm/memac_phy.c
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Diffstat (limited to 'drivers/net/fm/memac_phy.c')
-rw-r--r--drivers/net/fm/memac_phy.c150
1 files changed, 150 insertions, 0 deletions
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);
+}