diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig index 5a42c4590402..070e704829e5 100644 --- a/drivers/usb/dwc3/Kconfig +++ b/drivers/usb/dwc3/Kconfig @@ -87,6 +87,15 @@ config USB_DWC3_KEYSTONE Support of USB2/3 functionality in TI Keystone2 platforms. Say 'Y' or 'M' here if you have one such device +config USB_DWC3_OF_SIMPLE + tristate "Generic OF Simple Glue Layer" + depends on OF && COMMON_CLK + default USB_DWC3 + help + Support USB2/3 functionality in simple SoC integrations. + Currently supports Xilinx and Qualcomm DWC USB3 IP. + Say 'Y' or 'M' if you have one such device. + config USB_DWC3_ST tristate "STMicroelectronics Platforms" depends on ARCH_STI && OF diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile index acc951d46c27..6491f9b474d4 100644 --- a/drivers/usb/dwc3/Makefile +++ b/drivers/usb/dwc3/Makefile @@ -37,5 +37,6 @@ obj-$(CONFIG_USB_DWC3_OMAP) += dwc3-omap.o obj-$(CONFIG_USB_DWC3_EXYNOS) += dwc3-exynos.o obj-$(CONFIG_USB_DWC3_PCI) += dwc3-pci.o obj-$(CONFIG_USB_DWC3_KEYSTONE) += dwc3-keystone.o +obj-$(CONFIG_USB_DWC3_OF_SIMPLE) += dwc3-of-simple.o obj-$(CONFIG_USB_DWC3_QCOM) += dwc3-qcom.o obj-$(CONFIG_USB_DWC3_ST) += dwc3-st.o diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c new file mode 100644 index 000000000000..60c4c5a44307 --- /dev/null +++ b/drivers/usb/dwc3/dwc3-of-simple.c @@ -0,0 +1,178 @@ +/** + * dwc3-of-simple.c - OF glue layer for simple integrations + * + * Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com + * + * Author: Felipe Balbi + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 of + * the License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * This is a combination of the old dwc3-qcom.c by Ivan T. Ivanov + * and the original patch adding support for Xilinx' SoC + * by Subbaraya Sundeep Bhatta + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct dwc3_of_simple { + struct device *dev; + struct clk **clks; + int num_clocks; +}; + +static int dwc3_of_simple_probe(struct platform_device *pdev) +{ + struct dwc3_of_simple *simple; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + + int ret; + int i; + + simple = devm_kzalloc(dev, sizeof(*simple), GFP_KERNEL); + if (!simple) + return -ENOMEM; + + ret = of_clk_get_parent_count(np); + if (ret < 0) + return ret; + + simple->num_clocks = ret; + + simple->clks = devm_kcalloc(dev, simple->num_clocks, + sizeof(struct clk *), GFP_KERNEL); + if (!simple->clks) + return -ENOMEM; + + simple->dev = dev; + + for (i = 0; i < simple->num_clocks; i++) { + struct clk *clk; + + clk = of_clk_get(np, i); + if (IS_ERR(clk)) { + while (--i >= 0) + clk_put(simple->clks[i]); + return PTR_ERR(clk); + } + + ret = clk_prepare_enable(clk); + if (ret < 0) { + while (--i >= 0) { + clk_disable_unprepare(simple->clks[i]); + clk_put(simple->clks[i]); + } + clk_put(clk); + + return ret; + } + + simple->clks[i] = clk; + } + + ret = of_platform_populate(np, NULL, NULL, dev); + if (ret) { + for (i = 0; i < simple->num_clocks; i++) { + clk_disable_unprepare(simple->clks[i]); + clk_put(simple->clks[i]); + } + + return ret; + } + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + + return 0; +} + +static int dwc3_of_simple_remove(struct platform_device *pdev) +{ + struct dwc3_of_simple *simple = platform_get_drvdata(pdev); + struct device *dev = &pdev->dev; + int i; + + for (i = 0; i < simple->num_clocks; i++) { + clk_unprepare(simple->clks[i]); + clk_put(simple->clks[i]); + } + + of_platform_depopulate(dev); + + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + + return 0; +} + +static int dwc3_of_simple_runtime_suspend(struct device *dev) +{ + struct dwc3_of_simple *simple = dev_get_drvdata(dev); + int i; + + for (i = 0; i < simple->num_clocks; i++) + clk_disable(simple->clks[i]); + + return 0; +} + +static int dwc3_of_simple_runtime_resume(struct device *dev) +{ + struct dwc3_of_simple *simple = dev_get_drvdata(dev); + int ret; + int i; + + for (i = 0; i < simple->num_clocks; i++) { + ret = clk_enable(simple->clks[i]); + if (ret < 0) { + while (--i >= 0) + clk_disable(simple->clks[i]); + return ret; + } + } + + return 0; +} + +static const struct dev_pm_ops dwc3_of_simple_dev_pm_ops = { + SET_RUNTIME_PM_OPS(dwc3_of_simple_runtime_suspend, + dwc3_of_simple_runtime_resume, NULL) +}; + +static const struct of_device_id of_dwc3_simple_match[] = { + { .compatible = "qcom,dwc3" }, + { .compatible = "xlnx,zynqmp-dwc3" }, + { /* Sentinel */ } +}; +MODULE_DEVICE_TABLE(of, of_dwc3_simple_match); + +static struct platform_driver dwc3_of_simple_driver = { + .probe = dwc3_of_simple_probe, + .remove = dwc3_of_simple_remove, + .driver = { + .name = "dwc3-of-simple", + .of_match_table = of_dwc3_simple_match, + }, +}; + +module_platform_driver(dwc3_of_simple_driver); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("DesignWare USB3 OF Simple Glue Layer"); +MODULE_AUTHOR("Felipe Balbi ");