49ec39fa7f
This patch provides helper functions to read or write a register via the MDIO bus. They can be used from drivers to easily access registers on the MDIO bus. Change-Id: I293d93435d27269a071b4b9b94a1b55307c575a7 Signed-off-by: Werner Zeh <werner.zeh@siemens.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/69611 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
40 lines
1 KiB
C
40 lines
1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <assert.h>
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#include <console/console.h>
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#include <device/device.h>
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#include <device/mdio.h>
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#include <stddef.h>
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const struct mdio_bus_operations *dev_get_mdio_ops(struct device *dev)
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{
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if (!dev || !dev->ops || !dev->ops->ops_mdio) {
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printk(BIOS_ERR, "Could not get MDIO operations.\n");
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return NULL;
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}
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return dev->ops->ops_mdio;
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}
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uint16_t mdio_read(struct device *dev, uint8_t offset)
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{
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const struct mdio_bus_operations *mdio_ops;
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struct device *parent = dev->bus->dev;
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assert(dev->path.type == DEVICE_PATH_MDIO);
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mdio_ops = dev_get_mdio_ops(parent);
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if (!mdio_ops)
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return 0;
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return mdio_ops->read(parent, dev->path.mdio.addr, offset);
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}
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void mdio_write(struct device *dev, uint8_t offset, uint16_t val)
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{
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const struct mdio_bus_operations *mdio_ops;
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struct device *parent = dev->bus->dev;
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assert(dev->path.type == DEVICE_PATH_MDIO);
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mdio_ops = dev_get_mdio_ops(parent);
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if (!mdio_ops)
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return;
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mdio_ops->write(parent, dev->path.mdio.addr, offset, val);
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}
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