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Message-ID: <1468038656-10345-4-git-send-email-rajesh.bhagat@nxp.com>
Date: Sat, 9 Jul 2016 10:00:54 +0530
From: Rajesh Bhagat <rajesh.bhagat@....com>
To: <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<devicetree@...r.kernel.org>
CC: <Peter.Chen@....com>, <gregkh@...uxfoundation.org>,
<kishon@...com>, <robh+dt@...nel.org>, <shawnguo@...nel.org>,
<linux-arm-kernel@...ts.infradead.org>,
Rajesh Bhagat <rajesh.bhagat@....com>
Subject: [PATCH v2 3/5] drivers: usb: phy: Add qoriq usb 2.0 phy driver support
Adds qoriq usb 2.0 phy driver support for LS1021A and LS1012A
platform.
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@....com>
---
Changes in v2:
- Replaced Freescale with QorIQ in comments section
- Changed the compatible string to fsl,qoriq-usb2-phy and added version
- Added dependency on ARCH_MXC/ARCH_LAYERSCAPE and OF in Kconfig
- Dropped CONFIG_ULPI #ifdefs to make code generic
- Removed calls to devm free/release calls
drivers/phy/Kconfig | 8 ++
drivers/phy/Makefile | 1 +
drivers/phy/phy-qoriq-usb2.c | 228 +++++++++++++++++++++++++++++++++++++++++++
drivers/phy/phy-qoriq-usb2.h | 50 ++++++++++
4 files changed, 287 insertions(+)
create mode 100644 drivers/phy/phy-qoriq-usb2.c
create mode 100644 drivers/phy/phy-qoriq-usb2.h
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index b869b98..cc69299 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -434,4 +434,12 @@ config PHY_CYGNUS_PCIE
source "drivers/phy/tegra/Kconfig"
+config PHY_QORIQ_USB2
+ tristate "QorIQ USB 2.0 PHY driver"
+ depends on ARCH_MXC || ARCH_LAYERSCAPE
+ depends on OF
+ select GENERIC_PHY
+ help
+ Enable this to support the USB2.0 PHY on the QorIQ SoC.
+
endmenu
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 9c3e73c..044105a 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -53,5 +53,6 @@ obj-$(CONFIG_PHY_TUSB1210) += phy-tusb1210.o
obj-$(CONFIG_PHY_BRCM_SATA) += phy-brcm-sata.o
obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
obj-$(CONFIG_PHY_CYGNUS_PCIE) += phy-bcm-cygnus-pcie.o
+obj-$(CONFIG_PHY_QORIQ_USB2) += phy-qoriq-usb2.o
obj-$(CONFIG_ARCH_TEGRA) += tegra/
diff --git a/drivers/phy/phy-qoriq-usb2.c b/drivers/phy/phy-qoriq-usb2.c
new file mode 100644
index 0000000..f74d255
--- /dev/null
+++ b/drivers/phy/phy-qoriq-usb2.c
@@ -0,0 +1,228 @@
+/*
+ * QorIQ SoC USB 2.0 PHY driver
+ *
+ * Copyright 2016 Freescale Semiconductor, Inc.
+ * Author: Rajesh Bhagat <rajesh.bhagat@....com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/usb/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/phy/phy.h>
+#include <linux/usb/phy.h>
+#include <linux/usb/ulpi.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+#include "phy-qoriq-usb2.h"
+
+static int qoriq_usb2_phy_init(struct phy *_phy)
+{
+ struct qoriq_usb2_phy_ctx *ctx = phy_get_drvdata(_phy);
+ struct device *dev = ctx->dev;
+
+ if (ctx->ulpi_phy) {
+ if (usb_phy_init(ctx->ulpi_phy)) {
+ dev_err(dev, "unable to init transceiver, probably missing\n");
+ return -ENODEV;
+ }
+ }
+
+ return 0;
+}
+
+static int qoriq_usb2_phy_power_on(struct phy *_phy)
+{
+ struct qoriq_usb2_phy_ctx *ctx = phy_get_drvdata(_phy);
+ u32 flags;
+
+ if (ctx->ulpi_phy) {
+ flags = usb_phy_io_read(ctx->ulpi_phy, ULPI_OTG_CTRL);
+ usb_phy_io_write(ctx->ulpi_phy, flags |
+ (ULPI_OTG_CTRL_DRVVBUS_EXT |
+ ULPI_OTG_CTRL_EXTVBUSIND), ULPI_OTG_CTRL);
+ flags = usb_phy_io_read(ctx->ulpi_phy, ULPI_IFC_CTRL);
+ usb_phy_io_write(ctx->ulpi_phy, flags |
+ (ULPI_IFC_CTRL_EXTERNAL_VBUS |
+ ULPI_IFC_CTRL_PASSTHRU), ULPI_IFC_CTRL);
+ }
+
+ return 0;
+}
+
+static int qoriq_usb2_phy_power_off(struct phy *_phy)
+{
+ /* TODO: Add logic to power off phy */
+
+ return 0;
+}
+
+static int qoriq_usb2_phy_exit(struct phy *_phy)
+{
+ struct qoriq_usb2_phy_ctx *ctx = phy_get_drvdata(_phy);
+
+ if (ctx->ulpi_phy)
+ usb_phy_shutdown(ctx->ulpi_phy);
+
+ return 0;
+}
+
+static const struct phy_ops ops = {
+ .init = qoriq_usb2_phy_init,
+ .power_on = qoriq_usb2_phy_power_on,
+ .power_off = qoriq_usb2_phy_power_off,
+ .exit = qoriq_usb2_phy_exit,
+ .owner = THIS_MODULE,
+};
+
+
+static enum qoriq_usb2_phy_ver of_usb_get_phy_version(struct device_node *np)
+{
+ enum qoriq_usb2_phy_ver phy_version = QORIQ_PHY_UNKNOWN;
+
+ if (of_device_is_compatible(np, "fsl,qoriq-usb2-phy")) {
+ if (of_device_is_compatible(np, "fsl,qoriq-usb2-phy-v1.0"))
+ phy_version = QORIQ_PHY_LEGACY;
+ else if (of_device_is_compatible(np, "fsl,qoriq-usb2-phy-v2.0"))
+ phy_version = QORIQ_PHY_NXP_ISP1508;
+ }
+ return phy_version;
+}
+
+static int qoriq_usb2_phy_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct resource *res;
+ struct qoriq_usb2_phy_ctx *ctx;
+ struct device *dev = &pdev->dev;
+ const struct of_device_id *of_id;
+ struct phy_provider *phy_provider;
+ struct device_node *np = pdev->dev.of_node;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->dev = dev;
+
+ of_id = of_match_device(dev->driver->of_match_table, dev);
+ if (!of_id) {
+ dev_err(dev, "failed to get device match\n");
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "failed to get I/O memory\n");
+ ret = -ENOENT;
+ goto err_out;
+ }
+
+ ctx->regs = devm_ioremap(dev, res->start, resource_size(res));
+ if (!ctx->regs) {
+ dev_err(dev, "failed to remap I/O memory\n");
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ platform_set_drvdata(pdev, ctx);
+
+ ctx->phy = devm_phy_create(ctx->dev, NULL, &ops);
+ if (IS_ERR(ctx->phy)) {
+ dev_err(dev, "failed to create PHY\n");
+ ret = PTR_ERR(ctx->phy);
+ goto err_out;
+ }
+ phy_set_drvdata(ctx->phy, ctx);
+
+ ctx->phy_version = of_usb_get_phy_version(np);
+ if (ctx->phy_version == QORIQ_PHY_UNKNOWN) {
+ ret = -EINVAL;
+ dev_err(dev, "failed to get PHY version\n");
+ goto err_out;
+ }
+
+ ctx->phy_type = of_usb_get_phy_mode(np);
+ switch (ctx->phy_type) {
+ case USBPHY_INTERFACE_MODE_ULPI:
+ switch (ctx->phy_version) {
+ case QORIQ_PHY_NXP_ISP1508:
+ ctx->ulpi_phy = qoriq_otg_ulpi_create(0);
+ if (!ctx->ulpi_phy) {
+ dev_err(dev, "qoriq_otg_ulpi_create returned NULL\n");
+ ret = -ENOMEM;
+ goto err_out;
+ }
+ ctx->ulpi_phy->io_priv = ctx->regs + ULPI_VIEWPORT;
+ break;
+ default:
+ ctx->ulpi_phy = NULL;
+ break;
+ }
+ break;
+ default:
+ dev_err(&pdev->dev, "phy_type %d is invalid or unsupported\n",
+ ctx->phy_type);
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+ if (IS_ERR(phy_provider)) {
+ dev_err(dev, "failed to register phy_provider\n");
+ ret = PTR_ERR_OR_ZERO(phy_provider);
+ goto err_out;
+ }
+
+ dev_dbg(dev, "initialized\n");
+ return 0;
+
+err_out:
+ return ret;
+}
+
+static int qoriq_usb2_phy_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct qoriq_usb2_phy_ctx *ctx = platform_get_drvdata(pdev);
+
+ devm_phy_destroy(ctx->dev, ctx->phy);
+ devm_iounmap(dev, ctx->regs);
+ dev_dbg(dev, "de-initialized\n");
+ return 0;
+}
+
+static const struct of_device_id qoriq_usb2_phy_dt_ids[] = {
+ { .compatible = "fsl,qoriq-usb2-phy"},
+ {}
+};
+
+MODULE_DEVICE_TABLE(of, qoriq_usb2_phy_dt_ids);
+
+static struct platform_driver qoriq_usb2_phy_driver = {
+ .probe = qoriq_usb2_phy_probe,
+ .remove = qoriq_usb2_phy_remove,
+ .driver = {
+ .name = "qoriq_usb2_phy",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(qoriq_usb2_phy_dt_ids),
+ },
+};
+
+module_platform_driver(qoriq_usb2_phy_driver);
+
+MODULE_ALIAS("platform:qoriq-usb2-phy");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("QorIQ SoC USB PHY driver");
+MODULE_AUTHOR("Rajesh Bhagat <rajesh.bhagat@....com>");
diff --git a/drivers/phy/phy-qoriq-usb2.h b/drivers/phy/phy-qoriq-usb2.h
new file mode 100644
index 0000000..47c37a5
--- /dev/null
+++ b/drivers/phy/phy-qoriq-usb2.h
@@ -0,0 +1,50 @@
+/*
+ * Freescale SoC USB 2.0 PHY driver
+ *
+ * Copyright 2016 Freescale Semiconductor, Inc.
+ * Author: Rajesh Bhagat <rajesh.bhagat@....com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#ifndef _PHY_QORIQ_USB2_H
+#define _PHY_QORIQ_USB2_H
+
+#include <linux/clk.h>
+#include <linux/phy/phy.h>
+#include <linux/device.h>
+#include <linux/regmap.h>
+
+#define ULPI_VIEWPORT 0x170
+
+enum qoriq_usb2_phy_ver {
+ QORIQ_PHY_LEGACY,
+ QORIQ_PHY_NXP_ISP1508,
+ QORIQ_PHY_UNKNOWN,
+};
+
+struct qoriq_usb2_phy_ctx {
+ struct phy *phy;
+ struct clk *clk;
+ struct device *dev;
+ void __iomem *regs;
+ struct usb_phy *ulpi_phy;
+ enum usb_phy_interface phy_type;
+ enum qoriq_usb2_phy_ver phy_version;
+};
+
+#ifdef CONFIG_USB_ULPI_VIEWPORT
+static inline struct usb_phy *qoriq_otg_ulpi_create(unsigned int flags)
+{
+ return otg_ulpi_create(&ulpi_viewport_access_ops, flags);
+}
+#else
+static inline struct usb_phy *qoriq_otg_ulpi_create(unsigned int flags)
+{
+ return NULL;
+}
+#endif
+
+#endif
--
2.6.2.198.g614a2ac
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