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Message-Id: <1424579140-30567-6-git-send-email-Sneeker.Yeh@tw.fujitsu.com>
Date: Sun, 22 Feb 2015 12:25:40 +0800
From: Sneeker Yeh <sneeker.yeh@...il.com>
To: Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>, Felipe Balbi <balbi@...com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Mathias Nyman <mathias.nyman@...el.com>,
Grant Likely <grant.likely@...aro.org>,
Huang Rui <ray.huang@....com>,
Kishon Vijay Abraham I <kishon@...com>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-usb@...r.kernel.org, linux-omap@...r.kernel.org
Cc: Andy Green <andy.green@...aro.org>,
Jassi Brar <jaswinder.singh@...aro.org>,
Sneeker Yeh <Sneeker.Yeh@...fujitsu.com>
Subject: [PATCH v5 5/5] usb: dwc3: add Fujitsu Specific Glue layer
This patch adds support for Synopsis DesignWare USB3 IP Core found
on Fujitsu Socs.
Signed-off-by: Sneeker Yeh <Sneeker.Yeh@...fujitsu.com>
---
.../devicetree/bindings/usb/fujitsu-dwc3.txt | 33 ++++
drivers/usb/dwc3/Kconfig | 10 +
drivers/usb/dwc3/Makefile | 1 +
drivers/usb/dwc3/dwc3-fujitsu.c | 206 ++++++++++++++++++++
4 files changed, 250 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/fujitsu-dwc3.txt
create mode 100644 drivers/usb/dwc3/dwc3-fujitsu.c
diff --git a/Documentation/devicetree/bindings/usb/fujitsu-dwc3.txt b/Documentation/devicetree/bindings/usb/fujitsu-dwc3.txt
new file mode 100644
index 0000000..fd16fe9
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/fujitsu-dwc3.txt
@@ -0,0 +1,33 @@
+FUJITSU GLUE COMPONENTS
+
+MB86S7x DWC3 GLUE
+- compatible: Should be "fujitsu,mb86s7x-dwc3"
+- clocks: from common clock binding, handle to usb clock.
+- clock-names: Should contain the following:
+ "core" Master/Core clock needs to run at a minimum of 125 MHz to
+ support a 4 Gbps IN or 4 Gbps OUT
+ transfer at a given time.
+
+Sub-nodes:
+The dwc3 core should be added as subnode to MB86S7x dwc3 glue.
+- dwc3 :
+ The binding details of dwc3 can be found in:
+ Documentation/devicetree/bindings/usb/dwc3.txt
+
+Example device nodes:
+
+ usb3host: mb86s7x_usb3host {
+ compatible = "fujitsu,mb86s7x-dwc3";
+ clocks = <&clk_alw_1_1>;
+ clock-names = "core";
+ #address-cells = <2>;
+ #size-cells = <1>;
+ ranges;
+
+ dwc3@...00000 {
+ compatible = "synopsys,dwc3";
+ reg = <0 0x32300000 0x100000>;
+ interrupts = <0 412 0x4>,
+ <0 414 0x4>;
+ };
+ };
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index edbf9c8..2e145ca 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -97,6 +97,16 @@ config USB_DWC3_QCOM
Recent Qualcomm SoCs ship with one DesignWare Core USB3 IP inside,
say 'Y' or 'M' if you have one such device.
+config USB_DWC3_FUJITSU
+ tristate "Fujitsu MB86S7x Designware USB3 Platform code"
+ default USB_DWC3
+ help
+ MB86S7X SOC ship with DesignWare Core USB3 IP inside,
+ this implementation also integrated Fujitsu USB PHY inside
+ this Core USB3 IP.
+
+ say 'Y' or 'M' if you have one such device.
+
comment "Debugging features"
config USB_DWC3_DEBUG
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index 46172f4..a92c747 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -37,3 +37,4 @@ obj-$(CONFIG_USB_DWC3_PCI) += dwc3-pci.o
obj-$(CONFIG_USB_DWC3_KEYSTONE) += dwc3-keystone.o
obj-$(CONFIG_USB_DWC3_QCOM) += dwc3-qcom.o
obj-$(CONFIG_USB_DWC3_ST) += dwc3-st.o
+obj-$(CONFIG_USB_DWC3_FUJITSU) += dwc3-fujitsu.o
diff --git a/drivers/usb/dwc3/dwc3-fujitsu.c b/drivers/usb/dwc3/dwc3-fujitsu.c
new file mode 100644
index 0000000..307a44c
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-fujitsu.c
@@ -0,0 +1,206 @@
+/**
+ * dwc3-fujitsu.c - Fujitsu mb86s7x DWC3 Specific Glue layer
+ *
+ * Copyright (c) 2013 - 2015 FUJITSU SEMICONDUCTOR LIMITED
+ * http://jp.fujitsu.com/group/fsl
+ *
+ * Authors: Alice Chan <Alice.Chan@...fujitsu.com>
+ * Sneeker Yeh <Sneeker.Yeh@...fujitsu.com>
+ * based on dwc3-exynos.c
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
+#include <linux/clk.h>
+
+struct dwc3_mb86s7x {
+ struct device *dev;
+ struct clk *clks[5];
+ u8 clk_cnt;
+};
+
+static int dwc3_mb86s7x_clk_control(struct device *dev, bool on)
+{
+ struct dwc3_mb86s7x *priv = dev_get_drvdata(dev);
+ int ret, i = priv->clk_cnt;
+
+ if (!on)
+ goto clock_off;
+
+ for (i = 0; i < priv->clk_cnt; i++) {
+ ret = clk_prepare_enable(priv->clks[i]);
+ if (ret) {
+ dev_err(dev, "failed to enable clock[%d]\n", i);
+ on = ret;
+ goto clock_off;
+ }
+ }
+
+ return 0;
+
+clock_off:
+ for (; i > 0;)
+ clk_disable_unprepare(priv->clks[--i]);
+
+ return on;
+}
+
+static int dwc3_mb86s7x_remove_child(struct device *dev, void *unused)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+
+ of_device_unregister(pdev);
+
+ return 0;
+}
+
+static int dwc3_mb86s7x_probe(struct platform_device *pdev)
+{
+ struct dwc3_mb86s7x *priv;
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
+ int ret, i;
+ struct clk *clk;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ platform_set_drvdata(pdev, priv);
+ priv->dev = dev;
+
+ dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+
+ for (i = 0; i < ARRAY_SIZE(priv->clks); i++) {
+ clk = of_clk_get(dev->of_node, i);
+ if (IS_ERR(clk))
+ break;
+ priv->clks[i] = clk;
+ }
+ priv->clk_cnt = i;
+ if (!i) {
+ dev_err(dev, "clock not found\n");
+ ret = PTR_ERR(clk);
+ goto err;
+ }
+
+ ret = dwc3_mb86s7x_clk_control(dev, true);
+ if (ret)
+ goto err_clk;
+
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ ret = pm_runtime_get(dev);
+ if (ret < 0) {
+ dev_err(dev, "get_sync failed with err %d\n", ret);
+ ret = -ENODEV;
+ goto err_pm;
+ }
+
+ if (node) {
+ ret = of_platform_populate(node, NULL, NULL, dev);
+ if (!ret)
+ return 0;
+ dev_err(dev, "failed to add dwc3 core\n");
+ }
+ dev_err(dev, "no device node, failed to add dwc3 core\n");
+ ret = -ENODEV;
+
+ pm_runtime_put_sync(dev);
+err_pm:
+ pm_runtime_disable(dev);
+err_clk:
+ for (i = 0; i < priv->clk_cnt; i++)
+ clk_put(priv->clks[i]);
+err:
+
+ return ret;
+}
+
+static int dwc3_mb86s7x_remove(struct platform_device *pdev)
+{
+ struct dwc3_mb86s7x *priv = dev_get_drvdata(&pdev->dev);
+ int i;
+
+ device_for_each_child(&pdev->dev, NULL, dwc3_mb86s7x_remove_child);
+
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
+ dwc3_mb86s7x_clk_control(&pdev->dev, false);
+
+ for (i = 0; i < priv->clk_cnt ; i++)
+ clk_put(priv->clks[i]);
+
+ return 0;
+}
+
+static const struct of_device_id mb86s7x_dwc3_match[] = {
+ { .compatible = "fujitsu,mb86s7x-dwc3" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mb86s7x_dwc3_match);
+
+#ifdef CONFIG_PM_SLEEP
+static int dwc3_mb86s7x_suspend(struct device *dev)
+{
+ dwc3_mb86s7x_clk_control(dev, false);
+
+ return 0;
+}
+
+static int dwc3_mb86s7x_resume(struct device *dev)
+{
+ int ret;
+
+ ret = dwc3_mb86s7x_clk_control(dev, true);
+ if (ret)
+ return ret;
+
+ /* runtime set active to reflect active state. */
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ return 0;
+}
+
+static const struct dev_pm_ops dwc3_mb86s7x_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(dwc3_mb86s7x_suspend, dwc3_mb86s7x_resume)
+};
+
+#define DEV_PM_OPS (&dwc3_mb86s7x_dev_pm_ops)
+#else
+#define DEV_PM_OPS NULL
+#endif /* CONFIG_PM_SLEEP */
+
+static struct platform_driver dwc3_mb86s7x_driver = {
+ .probe = dwc3_mb86s7x_probe,
+ .remove = dwc3_mb86s7x_remove,
+ .driver = {
+ .name = "mb86s7x-dwc3",
+ .of_match_table = of_match_ptr(mb86s7x_dwc3_match),
+ .pm = DEV_PM_OPS,
+ },
+};
+
+module_platform_driver(dwc3_mb86s7x_driver);
+
+MODULE_ALIAS("platform:mb86s7x-dwc3");
+MODULE_AUTHOR("Alice Chan <Alice.Chan@...fujitsu.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("DesignWare USB3 mb86s7x Glue Layer");
--
1.7.9.5
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