Revert "phy: Add USB3 PHY support for Broadcom NSP SoC"

This reverts commit d7bc1a7d41bf ("phy: Add USB3 PHY support for
Broadcom NSP SoC") as we already have driver for this PHY (shared by NS
and NSP). It was added in commit e5666281d9ea ("phy: bcm-ns-usb3: new
driver for USB 3.0 PHY on Northstar").

Instead of adding separated driver & duplicating code we should work on
improving existing (old) one. Thanks to work done by Broadcom we know
there is MDIO bus we weren't aware of & we know register names which
makes initialization more clear. This is very valuable info and we
should work on using it in existing driver afterwards.

Acked-by: Jon Mason <jon.mason@broadcom.com>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index dc5277a..c110444 100644 (file)
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -510,12 +510,4 @@ 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 e7b0feb..dd8f3b5 100644 (file)
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -62,4 +62,3 @@ 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
deleted file mode 100644 (file)
index 49024ea..0000000
--- a/drivers/phy/phy-bcm-nsp-usb3.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/*
- * 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");