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authorYendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>2017-01-17 11:14:29 -0500
committerKishon Vijay Abraham I <kishon@ti.com>2017-01-27 13:06:53 +0530
commitd7bc1a7d41bfb99ded18e91c1976276a8445768a (patch)
treeb806547c3bc8b51d690d749edf839d5a66353e1b
parentc8ca631f9480cb4c6df78dd3d2eeeb5ac99ba4f3 (diff)
downloadlinux-d7bc1a7d41bfb99ded18e91c1976276a8445768a.tar.bz2
phy: Add USB3 PHY support for Broadcom NSP SoC
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>
-rw-r--r--drivers/phy/Kconfig8
-rw-r--r--drivers/phy/Makefile1
-rw-r--r--drivers/phy/phy-bcm-nsp-usb3.c177
3 files changed, 186 insertions, 0 deletions
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 61a22e985831..eff994d28139 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 0e4259473d28..9f008004f75d 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 000000000000..49024eaa5545
--- /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");