3d40aed862
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Acked-by: Alex Elder <elder@linaro.org> Reviewed-by: Bhupesh Sharma <bhupesh.sharma@linaro.org> Reviewed-by: Wei Fang <wei.fang@nxp.com> Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Simon Horman <simon.horman@corigine.com> Link: https://lore.kernel.org/r/20230727014944.3972546-1-robh@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
153 lines
3.7 KiB
C
153 lines
3.7 KiB
C
/*
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* Driver for the MPC5200 Fast Ethernet Controller - MDIO bus driver
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*
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* Copyright (C) 2007 Domen Puncer, Telargo, Inc.
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* Copyright (C) 2008 Wolfram Sang, Pengutronix
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/phy.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_mdio.h>
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#include <linux/platform_device.h>
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#include <asm/io.h>
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#include <asm/mpc52xx.h>
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#include "fec_mpc52xx.h"
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struct mpc52xx_fec_mdio_priv {
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struct mpc52xx_fec __iomem *regs;
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};
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static int mpc52xx_fec_mdio_transfer(struct mii_bus *bus, int phy_id,
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int reg, u32 value)
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{
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struct mpc52xx_fec_mdio_priv *priv = bus->priv;
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struct mpc52xx_fec __iomem *fec = priv->regs;
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int tries = 3;
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value |= (phy_id << FEC_MII_DATA_PA_SHIFT) & FEC_MII_DATA_PA_MSK;
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value |= (reg << FEC_MII_DATA_RA_SHIFT) & FEC_MII_DATA_RA_MSK;
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out_be32(&fec->ievent, FEC_IEVENT_MII);
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out_be32(&fec->mii_data, value);
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/* wait for it to finish, this takes about 23 us on lite5200b */
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while (!(in_be32(&fec->ievent) & FEC_IEVENT_MII) && --tries)
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msleep(1);
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if (!tries)
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return -ETIMEDOUT;
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return value & FEC_MII_DATA_OP_RD ?
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in_be32(&fec->mii_data) & FEC_MII_DATA_DATAMSK : 0;
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}
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static int mpc52xx_fec_mdio_read(struct mii_bus *bus, int phy_id, int reg)
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{
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return mpc52xx_fec_mdio_transfer(bus, phy_id, reg, FEC_MII_READ_FRAME);
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}
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static int mpc52xx_fec_mdio_write(struct mii_bus *bus, int phy_id, int reg,
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u16 data)
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{
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return mpc52xx_fec_mdio_transfer(bus, phy_id, reg,
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data | FEC_MII_WRITE_FRAME);
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}
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static int mpc52xx_fec_mdio_probe(struct platform_device *of)
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{
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struct device *dev = &of->dev;
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struct device_node *np = of->dev.of_node;
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struct mii_bus *bus;
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struct mpc52xx_fec_mdio_priv *priv;
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struct resource res;
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int err;
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bus = mdiobus_alloc();
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if (bus == NULL)
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return -ENOMEM;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (priv == NULL) {
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err = -ENOMEM;
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goto out_free;
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}
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bus->name = "mpc52xx MII bus";
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bus->read = mpc52xx_fec_mdio_read;
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bus->write = mpc52xx_fec_mdio_write;
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/* setup registers */
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err = of_address_to_resource(np, 0, &res);
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if (err)
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goto out_free;
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priv->regs = ioremap(res.start, resource_size(&res));
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if (priv->regs == NULL) {
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err = -ENOMEM;
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goto out_free;
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}
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snprintf(bus->id, MII_BUS_ID_SIZE, "%x", res.start);
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bus->priv = priv;
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bus->parent = dev;
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dev_set_drvdata(dev, bus);
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/* set MII speed */
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out_be32(&priv->regs->mii_speed, ((mpc5xxx_get_bus_frequency(dev) >> 20) / 5) << 1);
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err = of_mdiobus_register(bus, np);
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if (err)
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goto out_unmap;
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return 0;
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out_unmap:
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iounmap(priv->regs);
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out_free:
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kfree(priv);
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mdiobus_free(bus);
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return err;
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}
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static void mpc52xx_fec_mdio_remove(struct platform_device *of)
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{
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struct mii_bus *bus = platform_get_drvdata(of);
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struct mpc52xx_fec_mdio_priv *priv = bus->priv;
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mdiobus_unregister(bus);
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iounmap(priv->regs);
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kfree(priv);
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mdiobus_free(bus);
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}
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static const struct of_device_id mpc52xx_fec_mdio_match[] = {
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{ .compatible = "fsl,mpc5200b-mdio", },
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{ .compatible = "fsl,mpc5200-mdio", },
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{ .compatible = "mpc5200b-fec-phy", },
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{}
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};
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MODULE_DEVICE_TABLE(of, mpc52xx_fec_mdio_match);
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struct platform_driver mpc52xx_fec_mdio_driver = {
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.driver = {
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.name = "mpc5200b-fec-phy",
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.owner = THIS_MODULE,
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.of_match_table = mpc52xx_fec_mdio_match,
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},
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.probe = mpc52xx_fec_mdio_probe,
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.remove_new = mpc52xx_fec_mdio_remove,
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};
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/* let fec driver call it, since this has to be registered before it */
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EXPORT_SYMBOL_GPL(mpc52xx_fec_mdio_driver);
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MODULE_LICENSE("Dual BSD/GPL");
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