phy: Add USB3 PHY support for Broadcom NSP SoC (d7bc1a7d) · Commits · e / devices / android_kernel_teracube_emerald

drivers/phy/Kconfig

+8 −0

Original line number	Original line	Diff line number	Diff line
	@@ -501,4 +501,12 @@ config PHY_MESON8B_USB2
	and GXBB SoCs.		and GXBB SoCs.
	If unsure, say N.		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		endmenu

drivers/phy/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -61,3 +61,4 @@ obj-$(CONFIG_PHY_CYGNUS_PCIE) += phy-bcm-cygnus-pcie.o
	obj-$(CONFIG_ARCH_TEGRA) += tegra/		obj-$(CONFIG_ARCH_TEGRA) += tegra/
	obj-$(CONFIG_PHY_NS2_PCIE) += phy-bcm-ns2-pcie.o		obj-$(CONFIG_PHY_NS2_PCIE) += phy-bcm-ns2-pcie.o
	obj-$(CONFIG_PHY_MESON8B_USB2) += phy-meson8b-usb2.o		obj-$(CONFIG_PHY_MESON8B_USB2) += phy-meson8b-usb2.o
			obj-$(CONFIG_PHY_NSP_USB3) += phy-bcm-nsp-usb3.o

drivers/phy/phy-bcm-nsp-usb3.c

0 → 100644

+177 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* 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");