178 lines
4.2 KiB
C
178 lines
4.2 KiB
C
/*
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* Copyright (C) 2016 Broadcom
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/mfd/syscon.h>
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#include <linux/mdio.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/phy/phy.h>
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#include <linux/regmap.h>
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#define NSP_USB3_RST_CTRL_OFFSET 0x3f8
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/* mdio reg access */
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#define NSP_USB3_PHY_BASE_ADDR_REG 0x1f
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#define NSP_USB3_PHY_PLL30_BLOCK 0x8000
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#define NSP_USB3_PLL_CONTROL 0x01
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#define NSP_USB3_PLLA_CONTROL0 0x0a
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#define NSP_USB3_PLLA_CONTROL1 0x0b
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#define NSP_USB3_PHY_TX_PMD_BLOCK 0x8040
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#define NSP_USB3_TX_PMD_CONTROL1 0x01
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#define NSP_USB3_PHY_PIPE_BLOCK 0x8060
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#define NSP_USB3_LFPS_CMP 0x02
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#define NSP_USB3_LFPS_DEGLITCH 0x03
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struct nsp_usb3_phy {
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struct regmap *usb3_ctrl;
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struct phy *phy;
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struct mdio_device *mdiodev;
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};
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static int nsp_usb3_phy_init(struct phy *phy)
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{
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struct nsp_usb3_phy *iphy = phy_get_drvdata(phy);
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struct mii_bus *bus = iphy->mdiodev->bus;
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int addr = iphy->mdiodev->addr;
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u32 data;
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int rc;
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rc = regmap_read(iphy->usb3_ctrl, 0, &data);
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if (rc)
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return rc;
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data |= 1;
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rc = regmap_write(iphy->usb3_ctrl, 0, data);
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if (rc)
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return rc;
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rc = regmap_write(iphy->usb3_ctrl, NSP_USB3_RST_CTRL_OFFSET, 1);
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if (rc)
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return rc;
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rc = mdiobus_write(bus, addr, NSP_USB3_PHY_BASE_ADDR_REG,
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NSP_USB3_PHY_PLL30_BLOCK);
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if (rc)
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return rc;
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rc = mdiobus_write(bus, addr, NSP_USB3_PLL_CONTROL, 0x1000);
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if (rc)
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return rc;
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rc = mdiobus_write(bus, addr, NSP_USB3_PLLA_CONTROL0, 0x6400);
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if (rc)
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return rc;
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rc = mdiobus_write(bus, addr, NSP_USB3_PLLA_CONTROL1, 0xc000);
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if (rc)
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return rc;
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rc = mdiobus_write(bus, addr, NSP_USB3_PLLA_CONTROL1, 0x8000);
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if (rc)
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return rc;
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rc = regmap_write(iphy->usb3_ctrl, NSP_USB3_RST_CTRL_OFFSET, 0);
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if (rc)
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return rc;
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rc = mdiobus_write(bus, addr, NSP_USB3_PLL_CONTROL, 0x9000);
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if (rc)
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return rc;
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rc = mdiobus_write(bus, addr, NSP_USB3_PHY_BASE_ADDR_REG,
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NSP_USB3_PHY_PIPE_BLOCK);
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if (rc)
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return rc;
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rc = mdiobus_write(bus, addr, NSP_USB3_LFPS_CMP, 0xf30d);
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if (rc)
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return rc;
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rc = mdiobus_write(bus, addr, NSP_USB3_LFPS_DEGLITCH, 0x6302);
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if (rc)
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return rc;
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rc = mdiobus_write(bus, addr, NSP_USB3_PHY_BASE_ADDR_REG,
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NSP_USB3_PHY_TX_PMD_BLOCK);
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if (rc)
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return rc;
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rc = mdiobus_write(bus, addr, NSP_USB3_TX_PMD_CONTROL1, 0x1003);
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return rc;
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}
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static struct phy_ops nsp_usb3_phy_ops = {
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.init = nsp_usb3_phy_init,
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.owner = THIS_MODULE,
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};
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static int nsp_usb3_phy_probe(struct mdio_device *mdiodev)
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{
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struct device *dev = &mdiodev->dev;
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struct phy_provider *provider;
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struct nsp_usb3_phy *iphy;
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iphy = devm_kzalloc(dev, sizeof(*iphy), GFP_KERNEL);
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if (!iphy)
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return -ENOMEM;
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iphy->mdiodev = mdiodev;
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iphy->usb3_ctrl = syscon_regmap_lookup_by_phandle(dev->of_node,
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"usb3-ctrl-syscon");
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if (IS_ERR(iphy->usb3_ctrl))
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return PTR_ERR(iphy->usb3_ctrl);
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iphy->phy = devm_phy_create(dev, dev->of_node, &nsp_usb3_phy_ops);
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if (IS_ERR(iphy->phy)) {
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dev_err(dev, "failed to create PHY\n");
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return PTR_ERR(iphy->phy);
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}
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phy_set_drvdata(iphy->phy, iphy);
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provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
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if (IS_ERR(provider)) {
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dev_err(dev, "could not register PHY provider\n");
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return PTR_ERR(provider);
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}
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return 0;
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}
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static const struct of_device_id nsp_usb3_phy_of_match[] = {
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{.compatible = "brcm,nsp-usb3-phy",},
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{ /* sentinel */ }
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};
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static struct mdio_driver nsp_usb3_phy_driver = {
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.mdiodrv = {
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.driver = {
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.name = "nsp-usb3-phy",
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.of_match_table = nsp_usb3_phy_of_match,
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},
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},
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.probe = nsp_usb3_phy_probe,
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};
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mdio_module_driver(nsp_usb3_phy_driver);
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MODULE_DESCRIPTION("Broadcom NSP USB3 PHY driver");
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com");
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