This patch adds support for Synopsis DesignWare USB3 IP Core found on Fujitsu Socs. Signed-off-by: Sneeker Yeh <Sneeker.Yeh@xxxxxxxxxxxxxx> --- .../devicetree/bindings/usb/fujitsu-dwc3.txt | 33 ++++ drivers/usb/dwc3/Kconfig | 11 ++ drivers/usb/dwc3/Makefile | 1 + drivers/usb/dwc3/dwc3-mb86s70.c | 206 ++++++++++++++++++++ 4 files changed, 251 insertions(+) create mode 100644 Documentation/devicetree/bindings/usb/fujitsu-dwc3.txt create mode 100644 drivers/usb/dwc3/dwc3-mb86s70.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..be091eb --- /dev/null +++ b/Documentation/devicetree/bindings/usb/fujitsu-dwc3.txt @@ -0,0 +1,33 @@ +FUJITSU GLUE COMPONENTS + +MB86S7x DWC3 GLUE +- compatible: Should be "fujitsu,mb86s70-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: mb86s70_usb3host { + compatible = "fujitsu,mb86s70-dwc3"; + clocks = <&clk_alw_1_1>; + clock-names = "core"; + #address-cells = <2>; + #size-cells = <1>; + ranges; + + dwc3@32200000 { + 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 58b5b2c..3390d42 100644 --- a/drivers/usb/dwc3/Kconfig +++ b/drivers/usb/dwc3/Kconfig @@ -61,6 +61,17 @@ config USB_DWC3_EXYNOS Recent Exynos5 SoCs ship with one DesignWare Core USB3 IP inside, say 'Y' or 'M' if you have one such device. +config USB_DWC3_MB86S70 + tristate "MB86S70 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. + + config USB_DWC3_PCI tristate "PCIe-based Platforms" depends on PCI diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile index bb34fbc..05d1de2 100644 --- a/drivers/usb/dwc3/Makefile +++ b/drivers/usb/dwc3/Makefile @@ -38,3 +38,4 @@ 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_MB86S70) += dwc3-mb86s70.o diff --git a/drivers/usb/dwc3/dwc3-mb86s70.c b/drivers/usb/dwc3/dwc3-mb86s70.c new file mode 100644 index 0000000..301be76 --- /dev/null +++ b/drivers/usb/dwc3/dwc3-mb86s70.c @@ -0,0 +1,206 @@ +/** + * dwc3-mb86s70.c - Fujitsu mb86s70 DWC3 Specific Glue layer + * + * Copyright (c) 2013 - 2014 FUJITSU SEMICONDUCTOR LIMITED + * http://jp.fujitsu.com/group/fsl + * + * Authors: Alice Chan <Alice.Chan@xxxxxxxxxxxxxx> + * Sneeker Yeh <Sneeker.Yeh@xxxxxxxxxxxxxx> + * 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_mb86s70 { + struct device *dev; + struct clk *clks[5]; + u8 clk_cnt; +}; + +static int dwc3_mb86s70_clk_control(struct device *dev, bool on) +{ + struct dwc3_mb86s70 *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_mb86s70_remove_child(struct device *dev, void *unused) +{ + struct platform_device *pdev = to_platform_device(dev); + + of_device_unregister(pdev); + + return 0; +} + +static int dwc3_mb86s70_probe(struct platform_device *pdev) +{ + struct dwc3_mb86s70 *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_mb86s70_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_mb86s70_remove(struct platform_device *pdev) +{ + struct dwc3_mb86s70 *priv = dev_get_drvdata(&pdev->dev); + int i; + + device_for_each_child(&pdev->dev, NULL, dwc3_mb86s70_remove_child); + + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + dwc3_mb86s70_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 mb86s70_dwc3_match[] = { + { .compatible = "fujitsu,mb86s70-dwc3" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mb86s70_dwc3_match); + +#ifdef CONFIG_PM_SLEEP +static int dwc3_mb86s70_suspend(struct device *dev) +{ + dwc3_mb86s70_clk_control(dev, false); + + return 0; +} + +static int dwc3_mb86s70_resume(struct device *dev) +{ + int ret; + + ret = dwc3_mb86s70_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_mb86s70_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(dwc3_mb86s70_suspend, dwc3_mb86s70_resume) +}; + +#define DEV_PM_OPS (&dwc3_mb86s70_dev_pm_ops) +#else +#define DEV_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ + +static struct platform_driver dwc3_mb86s70_driver = { + .probe = dwc3_mb86s70_probe, + .remove = dwc3_mb86s70_remove, + .driver = { + .name = "mb86s70-dwc3", + .of_match_table = of_match_ptr(mb86s70_dwc3_match), + .pm = DEV_PM_OPS, + }, +}; + +module_platform_driver(dwc3_mb86s70_driver); + +MODULE_ALIAS("platform:mb86s70-dwc3"); +MODULE_AUTHOR("Alice Chan <Alice.Chan@xxxxxxxxxxxxxx>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("DesignWare USB3 mb86s70 Glue Layer"); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html