GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2009-2011 Freescale Semiconductor, Inc.
+ *	Andy Fleming <afleming@gmail.com>
+ * Some part is taken from tsec.c
+ */
+#include <common.h>
+#include <miiphy.h>
+#include <phy.h>
+#include <asm/io.h>
+#include <fsl_tgec.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
+ */
+static int tgec_mdio_write(struct mii_dev *bus, int port_addr, int dev_addr,
+			   int regnum, u16 value)
+{
+	u32 mdio_ctl;
+	u32 stat_val;
+	struct tgec_mdio_controller *regs = bus->priv;
+
+	if (dev_addr == MDIO_DEVAD_NONE)
+		return 0;
+
+	/* Wait till the bus is free */
+	stat_val = MDIO_STAT_CLKDIV(100);
+	out_be32(&regs->mdio_stat, stat_val);
+	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 */
+	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
+ */
+static int tgec_mdio_read(struct mii_dev *bus, int port_addr, int dev_addr,
+			  int regnum)
+{
+	u32 mdio_ctl;
+	u32 stat_val;
+	struct tgec_mdio_controller *regs = bus->priv;
+
+	if (dev_addr == MDIO_DEVAD_NONE)
+		return 0xffff;
+
+	stat_val = MDIO_STAT_CLKDIV(100);
+	out_be32(&regs->mdio_stat, stat_val);
+	/* 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 */
+	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;
+}
+
+static int tgec_mdio_reset(struct mii_dev *bus)
+{
+	return 0;
+}
+
+int fm_tgec_mdio_init(bd_t *bis, struct tgec_mdio_info *info)
+{
+	struct mii_dev *bus = mdio_alloc();
+
+	if (!bus) {
+		printf("Failed to allocate FM TGEC MDIO bus\n");
+		return -1;
+	}
+
+	bus->read = tgec_mdio_read;
+	bus->write = tgec_mdio_write;
+	bus->reset = tgec_mdio_reset;
+	strcpy(bus->name, info->name);
+
+	bus->priv = info->regs;
+
+	return mdio_register(bus);
+}