diff options
Diffstat (limited to 'drivers/usb/dwc3/dwc3-keystone.c')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-keystone.c | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/drivers/usb/dwc3/dwc3-keystone.c b/drivers/usb/dwc3/dwc3-keystone.c deleted file mode 100644 index fe3b933..0000000 --- a/drivers/usb/dwc3/dwc3-keystone.c +++ /dev/null @@ -1,197 +0,0 @@ -/** - * dwc3-keystone.c - Keystone Specific Glue layer - * - * Copyright (C) 2010-2013 Texas Instruments Incorporated - http://www.ti.com - * - * Author: WingMan Kwok <w-kwok2@ti.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 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. - */ - -#include <linux/clk.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> -#include <linux/dma-mapping.h> -#include <linux/io.h> -#include <linux/of_platform.h> - -/* USBSS register offsets */ -#define USBSS_REVISION 0x0000 -#define USBSS_SYSCONFIG 0x0010 -#define USBSS_IRQ_EOI 0x0018 -#define USBSS_IRQSTATUS_RAW_0 0x0020 -#define USBSS_IRQSTATUS_0 0x0024 -#define USBSS_IRQENABLE_SET_0 0x0028 -#define USBSS_IRQENABLE_CLR_0 0x002c - -/* IRQ register bits */ -#define USBSS_IRQ_EOI_LINE(n) BIT(n) -#define USBSS_IRQ_EVENT_ST BIT(0) -#define USBSS_IRQ_COREIRQ_EN BIT(0) -#define USBSS_IRQ_COREIRQ_CLR BIT(0) - -static u64 kdwc3_dma_mask; - -struct dwc3_keystone { - struct device *dev; - struct clk *clk; - void __iomem *usbss; -}; - -static inline u32 kdwc3_readl(void __iomem *base, u32 offset) -{ - return readl(base + offset); -} - -static inline void kdwc3_writel(void __iomem *base, u32 offset, u32 value) -{ - writel(value, base + offset); -} - -static void kdwc3_enable_irqs(struct dwc3_keystone *kdwc) -{ - u32 val; - - val = kdwc3_readl(kdwc->usbss, USBSS_IRQENABLE_SET_0); - val |= USBSS_IRQ_COREIRQ_EN; - kdwc3_writel(kdwc->usbss, USBSS_IRQENABLE_SET_0, val); -} - -static void kdwc3_disable_irqs(struct dwc3_keystone *kdwc) -{ - u32 val; - - val = kdwc3_readl(kdwc->usbss, USBSS_IRQENABLE_SET_0); - val &= ~USBSS_IRQ_COREIRQ_EN; - kdwc3_writel(kdwc->usbss, USBSS_IRQENABLE_SET_0, val); -} - -static irqreturn_t dwc3_keystone_interrupt(int irq, void *_kdwc) -{ - struct dwc3_keystone *kdwc = _kdwc; - - kdwc3_writel(kdwc->usbss, USBSS_IRQENABLE_CLR_0, USBSS_IRQ_COREIRQ_CLR); - kdwc3_writel(kdwc->usbss, USBSS_IRQSTATUS_0, USBSS_IRQ_EVENT_ST); - kdwc3_writel(kdwc->usbss, USBSS_IRQENABLE_SET_0, USBSS_IRQ_COREIRQ_EN); - kdwc3_writel(kdwc->usbss, USBSS_IRQ_EOI, USBSS_IRQ_EOI_LINE(0)); - - return IRQ_HANDLED; -} - -static int kdwc3_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct device_node *node = pdev->dev.of_node; - struct dwc3_keystone *kdwc; - struct resource *res; - int error, irq; - - kdwc = devm_kzalloc(dev, sizeof(*kdwc), GFP_KERNEL); - if (!kdwc) - return -ENOMEM; - - platform_set_drvdata(pdev, kdwc); - - kdwc->dev = dev; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - kdwc->usbss = devm_ioremap_resource(dev, res); - if (IS_ERR(kdwc->usbss)) - return PTR_ERR(kdwc->usbss); - - kdwc3_dma_mask = dma_get_mask(dev); - dev->dma_mask = &kdwc3_dma_mask; - - kdwc->clk = devm_clk_get(kdwc->dev, "usb"); - - error = clk_prepare_enable(kdwc->clk); - if (error < 0) { - dev_dbg(kdwc->dev, "unable to enable usb clock, err %d\n", - error); - return error; - } - - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - dev_err(&pdev->dev, "missing irq\n"); - error = irq; - goto err_irq; - } - - error = devm_request_irq(dev, irq, dwc3_keystone_interrupt, IRQF_SHARED, - dev_name(dev), kdwc); - if (error) { - dev_err(dev, "failed to request IRQ #%d --> %d\n", - irq, error); - goto err_irq; - } - - kdwc3_enable_irqs(kdwc); - - error = of_platform_populate(node, NULL, NULL, dev); - if (error) { - dev_err(&pdev->dev, "failed to create dwc3 core\n"); - goto err_core; - } - - return 0; - -err_core: - kdwc3_disable_irqs(kdwc); -err_irq: - clk_disable_unprepare(kdwc->clk); - - return error; -} - -static int kdwc3_remove_core(struct device *dev, void *c) -{ - struct platform_device *pdev = to_platform_device(dev); - - platform_device_unregister(pdev); - - return 0; -} - -static int kdwc3_remove(struct platform_device *pdev) -{ - struct dwc3_keystone *kdwc = platform_get_drvdata(pdev); - - kdwc3_disable_irqs(kdwc); - device_for_each_child(&pdev->dev, NULL, kdwc3_remove_core); - clk_disable_unprepare(kdwc->clk); - platform_set_drvdata(pdev, NULL); - - return 0; -} - -static const struct of_device_id kdwc3_of_match[] = { - { .compatible = "ti,keystone-dwc3", }, - {}, -}; -MODULE_DEVICE_TABLE(of, kdwc3_of_match); - -static struct platform_driver kdwc3_driver = { - .probe = kdwc3_probe, - .remove = kdwc3_remove, - .driver = { - .name = "keystone-dwc3", - .of_match_table = kdwc3_of_match, - }, -}; - -module_platform_driver(kdwc3_driver); - -MODULE_ALIAS("platform:keystone-dwc3"); -MODULE_AUTHOR("WingMan Kwok <w-kwok2@ti.com>"); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("DesignWare USB3 KEYSTONE Glue Layer"); |