diff options
Diffstat (limited to 'drivers/usb/dwc3/dwc3-keystone.c')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-keystone.c | 61 |
1 files changed, 49 insertions, 12 deletions
diff --git a/drivers/usb/dwc3/dwc3-keystone.c b/drivers/usb/dwc3/dwc3-keystone.c index 193a9a88222a..7ee1610162b9 100644 --- a/drivers/usb/dwc3/dwc3-keystone.c +++ b/drivers/usb/dwc3/dwc3-keystone.c @@ -1,8 +1,8 @@ // SPDX-License-Identifier: GPL-2.0 -/** +/* * dwc3-keystone.c - Keystone Specific Glue layer * - * Copyright (C) 2010-2013 Texas Instruments Incorporated - http://www.ti.com + * Copyright (C) 2010-2013 Texas Instruments Incorporated - https://www.ti.com * * Author: WingMan Kwok <w-kwok2@ti.com> */ @@ -13,7 +13,9 @@ #include <linux/platform_device.h> #include <linux/dma-mapping.h> #include <linux/io.h> +#include <linux/of.h> #include <linux/of_platform.h> +#include <linux/phy/phy.h> #include <linux/pm_runtime.h> /* USBSS register offsets */ @@ -34,6 +36,7 @@ struct dwc3_keystone { struct device *dev; void __iomem *usbss; + struct phy *usb3_phy; }; static inline u32 kdwc3_readl(void __iomem *base, u32 offset) @@ -81,7 +84,6 @@ 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); @@ -92,13 +94,37 @@ static int kdwc3_probe(struct platform_device *pdev) kdwc->dev = dev; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - kdwc->usbss = devm_ioremap_resource(dev, res); + kdwc->usbss = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(kdwc->usbss)) return PTR_ERR(kdwc->usbss); - pm_runtime_enable(kdwc->dev); + /* PSC dependency on AM65 needs SERDES0 to be powered before USB0 */ + kdwc->usb3_phy = devm_phy_optional_get(dev, "usb3-phy"); + if (IS_ERR(kdwc->usb3_phy)) + return dev_err_probe(dev, PTR_ERR(kdwc->usb3_phy), "couldn't get usb3 phy\n"); + + phy_pm_runtime_get_sync(kdwc->usb3_phy); + + error = phy_reset(kdwc->usb3_phy); + if (error < 0) { + dev_err(dev, "usb3 phy reset failed: %d\n", error); + return error; + } + error = phy_init(kdwc->usb3_phy); + if (error < 0) { + dev_err(dev, "usb3 phy init failed: %d\n", error); + return error; + } + + error = phy_power_on(kdwc->usb3_phy); + if (error < 0) { + dev_err(dev, "usb3 phy power on failed: %d\n", error); + phy_exit(kdwc->usb3_phy); + return error; + } + + pm_runtime_enable(kdwc->dev); error = pm_runtime_get_sync(kdwc->dev); if (error < 0) { dev_err(kdwc->dev, "pm_runtime_get_sync failed, error %d\n", @@ -106,9 +132,12 @@ static int kdwc3_probe(struct platform_device *pdev) goto err_irq; } + /* IRQ processing not required currently for AM65 */ + if (of_device_is_compatible(node, "ti,am654-dwc3")) + goto skip_irq; + irq = platform_get_irq(pdev, 0); if (irq < 0) { - dev_err(&pdev->dev, "missing irq\n"); error = irq; goto err_irq; } @@ -123,6 +152,7 @@ static int kdwc3_probe(struct platform_device *pdev) kdwc3_enable_irqs(kdwc); +skip_irq: error = of_platform_populate(node, NULL, NULL, dev); if (error) { dev_err(&pdev->dev, "failed to create dwc3 core\n"); @@ -136,6 +166,9 @@ err_core: err_irq: pm_runtime_put_sync(kdwc->dev); pm_runtime_disable(kdwc->dev); + phy_power_off(kdwc->usb3_phy); + phy_exit(kdwc->usb3_phy); + phy_pm_runtime_put_sync(kdwc->usb3_phy); return error; } @@ -149,22 +182,26 @@ static int kdwc3_remove_core(struct device *dev, void *c) return 0; } -static int kdwc3_remove(struct platform_device *pdev) +static void kdwc3_remove(struct platform_device *pdev) { struct dwc3_keystone *kdwc = platform_get_drvdata(pdev); + struct device_node *node = pdev->dev.of_node; + + if (!of_device_is_compatible(node, "ti,am654-dwc3")) + kdwc3_disable_irqs(kdwc); - kdwc3_disable_irqs(kdwc); device_for_each_child(&pdev->dev, NULL, kdwc3_remove_core); pm_runtime_put_sync(kdwc->dev); pm_runtime_disable(kdwc->dev); - platform_set_drvdata(pdev, NULL); - - return 0; + phy_power_off(kdwc->usb3_phy); + phy_exit(kdwc->usb3_phy); + phy_pm_runtime_put_sync(kdwc->usb3_phy); } static const struct of_device_id kdwc3_of_match[] = { { .compatible = "ti,keystone-dwc3", }, + { .compatible = "ti,am654-dwc3" }, {}, }; MODULE_DEVICE_TABLE(of, kdwc3_of_match); |