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

source/bootloader/u-boot-2020.01/drivers/net/fsl_mdio.c

@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2009-2010, 2013 Freescale Semiconductor, Inc.
+ *	Jun-jie Zhang <b18070@freescale.com>
+ *	Mingkai Hu <Mingkai.hu@freescale.com>
+ */
+
+#include <common.h>
+#include <miiphy.h>
+#include <phy.h>
+#include <fsl_mdio.h>
+#include <asm/io.h>
+#include <linux/errno.h>
+
+void tsec_local_mdio_write(struct tsec_mii_mng __iomem *phyregs, int port_addr,
+		int dev_addr, int regnum, int value)
+{
+	int timeout = 1000000;
+
+	out_be32(&phyregs->miimadd, (port_addr << 8) | (regnum & 0x1f));
+	out_be32(&phyregs->miimcon, value);
+	/* Memory barrier */
+	mb();
+
+	while ((in_be32(&phyregs->miimind) & MIIMIND_BUSY) && timeout--)
+		;
+}
+
+int tsec_local_mdio_read(struct tsec_mii_mng __iomem *phyregs, int port_addr,
+		int dev_addr, int regnum)
+{
+	int value;
+	int timeout = 1000000;
+
+	/* Put the address of the phy, and the register number into MIIMADD */
+	out_be32(&phyregs->miimadd, (port_addr << 8) | (regnum & 0x1f));
+
+	/* Clear the command register, and wait */
+	out_be32(&phyregs->miimcom, 0);
+	/* Memory barrier */
+	mb();
+
+	/* Initiate a read command, and wait */
+	out_be32(&phyregs->miimcom, MIIMCOM_READ_CYCLE);
+	/* Memory barrier */
+	mb();
+
+	/* Wait for the the indication that the read is done */
+	while ((in_be32(&phyregs->miimind) & (MIIMIND_NOTVALID | MIIMIND_BUSY))
+			&& timeout--)
+		;
+
+	/* Grab the value read from the PHY */
+	value = in_be32(&phyregs->miimstat);
+
+	return value;
+}
+
+static int fsl_pq_mdio_reset(struct mii_dev *bus)
+{
+	struct tsec_mii_mng __iomem *regs =
+		(struct tsec_mii_mng __iomem *)bus->priv;
+
+	/* Reset MII (due to new addresses) */
+	out_be32(&regs->miimcfg, MIIMCFG_RESET_MGMT);
+
+	out_be32(&regs->miimcfg, MIIMCFG_INIT_VALUE);
+
+	while (in_be32(&regs->miimind) & MIIMIND_BUSY)
+		;
+
+	return 0;
+}
+
+int tsec_phy_read(struct mii_dev *bus, int addr, int dev_addr, int regnum)
+{
+	struct tsec_mii_mng __iomem *phyregs =
+		(struct tsec_mii_mng __iomem *)bus->priv;
+
+	return tsec_local_mdio_read(phyregs, addr, dev_addr, regnum);
+}
+
+int tsec_phy_write(struct mii_dev *bus, int addr, int dev_addr, int regnum,
+			u16 value)
+{
+	struct tsec_mii_mng __iomem *phyregs =
+		(struct tsec_mii_mng __iomem *)bus->priv;
+
+	tsec_local_mdio_write(phyregs, addr, dev_addr, regnum, value);
+
+	return 0;
+}
+
+int fsl_pq_mdio_init(bd_t *bis, struct fsl_pq_mdio_info *info)
+{
+	struct mii_dev *bus = mdio_alloc();
+
+	if (!bus) {
+		printf("Failed to allocate FSL MDIO bus\n");
+		return -1;
+	}
+
+	bus->read = tsec_phy_read;
+	bus->write = tsec_phy_write;
+	bus->reset = fsl_pq_mdio_reset;
+	strcpy(bus->name, info->name);
+
+	bus->priv = (void *)info->regs;
+
+	return mdio_register(bus);
+}