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    Subject[PATCH 12/14] phy: Add USB3 PHY support for Broadcom NSP SoC
    Date
    From: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>

    This patch adds support for Broadcom NSP USB3 PHY

    Signed-off-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>
    Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
    Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
    ---
    drivers/phy/Kconfig | 8 ++
    drivers/phy/Makefile | 1 +
    drivers/phy/phy-bcm-nsp-usb3.c | 177 ++++++++++++++++++++++++++++++++++++++++
    3 files changed, 186 insertions(+)
    create mode 100644 drivers/phy/phy-bcm-nsp-usb3.c

    diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
    index 61a22e9..eff994d 100644
    --- a/drivers/phy/Kconfig
    +++ b/drivers/phy/Kconfig
    @@ -501,4 +501,12 @@ config PHY_MESON8B_USB2
    and GXBB SoCs.
    If unsure, say N.

    +config PHY_NSP_USB3
    + tristate "Broadcom NorthStar plus USB3 PHY driver"
    + depends on OF && (ARCH_BCM_NSP || COMPILE_TEST)
    + select GENERIC_PHY
    + default ARCH_BCM_NSP
    + help
    + Enable this to support the Broadcom Northstar plus USB3 PHY.
    + If unsure, say N.
    endmenu
    diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
    index 0e42594..9f00800 100644
    --- a/drivers/phy/Makefile
    +++ b/drivers/phy/Makefile
    @@ -61,3 +61,4 @@ obj-$(CONFIG_PHY_CYGNUS_PCIE) += phy-bcm-cygnus-pcie.o
    obj-$(CONFIG_ARCH_TEGRA) += tegra/
    obj-$(CONFIG_PHY_NS2_PCIE) += phy-bcm-ns2-pcie.o
    obj-$(CONFIG_PHY_MESON8B_USB2) += phy-meson8b-usb2.o
    +obj-$(CONFIG_PHY_NSP_USB3) += phy-bcm-nsp-usb3.o
    diff --git a/drivers/phy/phy-bcm-nsp-usb3.c b/drivers/phy/phy-bcm-nsp-usb3.c
    new file mode 100644
    index 0000000..49024ea
    --- /dev/null
    +++ b/drivers/phy/phy-bcm-nsp-usb3.c
    @@ -0,0 +1,177 @@
    +/*
    + * Copyright (C) 2016 Broadcom
    + *
    + * This program is free software; you can redistribute it and/or
    + * modify it under the terms of the GNU General Public License as
    + * published by the Free Software Foundation version 2.
    + *
    + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    + * kind, whether express or implied; without even the implied warranty
    + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + */
    +
    +#include <linux/delay.h>
    +#include <linux/io.h>
    +#include <linux/kernel.h>
    +#include <linux/mfd/syscon.h>
    +#include <linux/mdio.h>
    +#include <linux/module.h>
    +#include <linux/of.h>
    +#include <linux/of_address.h>
    +#include <linux/phy/phy.h>
    +#include <linux/regmap.h>
    +
    +#define NSP_USB3_RST_CTRL_OFFSET 0x3f8
    +
    +/* mdio reg access */
    +#define NSP_USB3_PHY_BASE_ADDR_REG 0x1f
    +
    +#define NSP_USB3_PHY_PLL30_BLOCK 0x8000
    +#define NSP_USB3_PLL_CONTROL 0x01
    +#define NSP_USB3_PLLA_CONTROL0 0x0a
    +#define NSP_USB3_PLLA_CONTROL1 0x0b
    +
    +#define NSP_USB3_PHY_TX_PMD_BLOCK 0x8040
    +#define NSP_USB3_TX_PMD_CONTROL1 0x01
    +
    +#define NSP_USB3_PHY_PIPE_BLOCK 0x8060
    +#define NSP_USB3_LFPS_CMP 0x02
    +#define NSP_USB3_LFPS_DEGLITCH 0x03
    +
    +struct nsp_usb3_phy {
    + struct regmap *usb3_ctrl;
    + struct phy *phy;
    + struct mdio_device *mdiodev;
    +};
    +
    +static int nsp_usb3_phy_init(struct phy *phy)
    +{
    + struct nsp_usb3_phy *iphy = phy_get_drvdata(phy);
    + struct mii_bus *bus = iphy->mdiodev->bus;
    + int addr = iphy->mdiodev->addr;
    + u32 data;
    + int rc;
    +
    + rc = regmap_read(iphy->usb3_ctrl, 0, &data);
    + if (rc)
    + return rc;
    + data |= 1;
    + rc = regmap_write(iphy->usb3_ctrl, 0, data);
    + if (rc)
    + return rc;
    +
    + rc = regmap_write(iphy->usb3_ctrl, NSP_USB3_RST_CTRL_OFFSET, 1);
    + if (rc)
    + return rc;
    +
    + rc = mdiobus_write(bus, addr, NSP_USB3_PHY_BASE_ADDR_REG,
    + NSP_USB3_PHY_PLL30_BLOCK);
    + if (rc)
    + return rc;
    +
    + rc = mdiobus_write(bus, addr, NSP_USB3_PLL_CONTROL, 0x1000);
    + if (rc)
    + return rc;
    +
    + rc = mdiobus_write(bus, addr, NSP_USB3_PLLA_CONTROL0, 0x6400);
    + if (rc)
    + return rc;
    +
    + rc = mdiobus_write(bus, addr, NSP_USB3_PLLA_CONTROL1, 0xc000);
    + if (rc)
    + return rc;
    +
    + rc = mdiobus_write(bus, addr, NSP_USB3_PLLA_CONTROL1, 0x8000);
    + if (rc)
    + return rc;
    +
    + rc = regmap_write(iphy->usb3_ctrl, NSP_USB3_RST_CTRL_OFFSET, 0);
    + if (rc)
    + return rc;
    +
    + rc = mdiobus_write(bus, addr, NSP_USB3_PLL_CONTROL, 0x9000);
    + if (rc)
    + return rc;
    +
    + rc = mdiobus_write(bus, addr, NSP_USB3_PHY_BASE_ADDR_REG,
    + NSP_USB3_PHY_PIPE_BLOCK);
    + if (rc)
    + return rc;
    +
    + rc = mdiobus_write(bus, addr, NSP_USB3_LFPS_CMP, 0xf30d);
    + if (rc)
    + return rc;
    +
    + rc = mdiobus_write(bus, addr, NSP_USB3_LFPS_DEGLITCH, 0x6302);
    + if (rc)
    + return rc;
    +
    + rc = mdiobus_write(bus, addr, NSP_USB3_PHY_BASE_ADDR_REG,
    + NSP_USB3_PHY_TX_PMD_BLOCK);
    + if (rc)
    + return rc;
    +
    + rc = mdiobus_write(bus, addr, NSP_USB3_TX_PMD_CONTROL1, 0x1003);
    +
    + return rc;
    +}
    +
    +static struct phy_ops nsp_usb3_phy_ops = {
    + .init = nsp_usb3_phy_init,
    + .owner = THIS_MODULE,
    +};
    +
    +static int nsp_usb3_phy_probe(struct mdio_device *mdiodev)
    +{
    + struct device *dev = &mdiodev->dev;
    + struct phy_provider *provider;
    + struct nsp_usb3_phy *iphy;
    +
    + iphy = devm_kzalloc(dev, sizeof(*iphy), GFP_KERNEL);
    + if (!iphy)
    + return -ENOMEM;
    + iphy->mdiodev = mdiodev;
    +
    + iphy->usb3_ctrl = syscon_regmap_lookup_by_phandle(dev->of_node,
    + "usb3-ctrl-syscon");
    + if (IS_ERR(iphy->usb3_ctrl))
    + return PTR_ERR(iphy->usb3_ctrl);
    +
    + iphy->phy = devm_phy_create(dev, dev->of_node, &nsp_usb3_phy_ops);
    + if (IS_ERR(iphy->phy)) {
    + dev_err(dev, "failed to create PHY\n");
    + return PTR_ERR(iphy->phy);
    + }
    +
    + phy_set_drvdata(iphy->phy, iphy);
    +
    + provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
    + if (IS_ERR(provider)) {
    + dev_err(dev, "could not register PHY provider\n");
    + return PTR_ERR(provider);
    + }
    +
    + return 0;
    +}
    +
    +static const struct of_device_id nsp_usb3_phy_of_match[] = {
    + {.compatible = "brcm,nsp-usb3-phy",},
    + { /* sentinel */ }
    +};
    +
    +static struct mdio_driver nsp_usb3_phy_driver = {
    + .mdiodrv = {
    + .driver = {
    + .name = "nsp-usb3-phy",
    + .of_match_table = nsp_usb3_phy_of_match,
    + },
    + },
    + .probe = nsp_usb3_phy_probe,
    +};
    +
    +mdio_module_driver(nsp_usb3_phy_driver);
    +
    +MODULE_DESCRIPTION("Broadcom NSP USB3 PHY driver");
    +MODULE_LICENSE("GPL v2");
    +MODULE_AUTHOR("Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com");
    --
    1.7.9.5
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