mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
125 lines
3 KiB
C
125 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2009-2011 Freescale Semiconductor, Inc.
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* Andy Fleming <afleming@gmail.com>
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* Some part is taken from tsec.c
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*/
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#include <common.h>
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#include <miiphy.h>
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#include <phy.h>
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#include <asm/io.h>
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#include <fsl_tgec.h>
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#include <fm_eth.h>
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/*
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* Write value to the PHY for this device to the register at regnum, waiting
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* until the write is done before it returns. All PHY configuration has to be
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* done through the TSEC1 MIIM regs
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*/
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static int tgec_mdio_write(struct mii_dev *bus, int port_addr, int dev_addr,
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int regnum, u16 value)
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{
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u32 mdio_ctl;
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u32 stat_val;
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struct tgec_mdio_controller *regs = bus->priv;
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if (dev_addr == MDIO_DEVAD_NONE)
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return 0;
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/* Wait till the bus is free */
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stat_val = MDIO_STAT_CLKDIV(100);
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out_be32(®s->mdio_stat, stat_val);
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while ((in_be32(®s->mdio_stat)) & MDIO_STAT_BSY)
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;
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/* Set the port and dev addr */
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mdio_ctl = MDIO_CTL_PORT_ADDR(port_addr) | MDIO_CTL_DEV_ADDR(dev_addr);
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out_be32(®s->mdio_ctl, mdio_ctl);
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/* Set the register address */
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out_be32(®s->mdio_addr, regnum & 0xffff);
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/* Wait till the bus is free */
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while ((in_be32(®s->mdio_stat)) & MDIO_STAT_BSY)
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;
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/* Write the value to the register */
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out_be32(®s->mdio_data, MDIO_DATA(value));
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/* Wait till the MDIO write is complete */
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while ((in_be32(®s->mdio_data)) & MDIO_DATA_BSY)
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;
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return 0;
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}
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/*
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* Reads from register regnum in the PHY for device dev, returning the value.
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* Clears miimcom first. All PHY configuration has to be done through the
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* TSEC1 MIIM regs
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*/
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static int tgec_mdio_read(struct mii_dev *bus, int port_addr, int dev_addr,
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int regnum)
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{
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u32 mdio_ctl;
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u32 stat_val;
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struct tgec_mdio_controller *regs = bus->priv;
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if (dev_addr == MDIO_DEVAD_NONE)
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return 0xffff;
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stat_val = MDIO_STAT_CLKDIV(100);
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out_be32(®s->mdio_stat, stat_val);
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/* Wait till the bus is free */
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while ((in_be32(®s->mdio_stat)) & MDIO_STAT_BSY)
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;
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/* Set the Port and Device Addrs */
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mdio_ctl = MDIO_CTL_PORT_ADDR(port_addr) | MDIO_CTL_DEV_ADDR(dev_addr);
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out_be32(®s->mdio_ctl, mdio_ctl);
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/* Set the register address */
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out_be32(®s->mdio_addr, regnum & 0xffff);
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/* Wait till the bus is free */
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while ((in_be32(®s->mdio_stat)) & MDIO_STAT_BSY)
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;
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/* Initiate the read */
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mdio_ctl |= MDIO_CTL_READ;
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out_be32(®s->mdio_ctl, mdio_ctl);
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/* Wait till the MDIO write is complete */
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while ((in_be32(®s->mdio_data)) & MDIO_DATA_BSY)
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;
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/* Return all Fs if nothing was there */
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if (in_be32(®s->mdio_stat) & MDIO_STAT_RD_ER)
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return 0xffff;
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return in_be32(®s->mdio_data) & 0xffff;
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}
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static int tgec_mdio_reset(struct mii_dev *bus)
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{
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return 0;
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}
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int fm_tgec_mdio_init(bd_t *bis, struct tgec_mdio_info *info)
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{
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struct mii_dev *bus = mdio_alloc();
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if (!bus) {
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printf("Failed to allocate FM TGEC MDIO bus\n");
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return -1;
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}
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bus->read = tgec_mdio_read;
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bus->write = tgec_mdio_write;
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bus->reset = tgec_mdio_reset;
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strcpy(bus->name, info->name);
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bus->priv = info->regs;
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return mdio_register(bus);
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}
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