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/*
* Copyright 2009-2010, 2013 Freescale Semiconductor, Inc.
* Jun-jie Zhang <b18070@freescale.com>
* Mingkai Hu <Mingkai.hu@freescale.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <miiphy.h>
#include <phy.h>
#include <fsl_mdio.h>
#include <asm/io.h>
#include <asm/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(®s->miimcfg, MIIMCFG_RESET_MGMT);
out_be32(®s->miimcfg, MIIMCFG_INIT_VALUE);
while (in_be32(®s->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;
sprintf(bus->name, info->name);
bus->priv = (void *)info->regs;
return mdio_register(bus);
}
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