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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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08f871a3ac
On some platforms a PHY may need to be handled also in the host controller driver. Exynos5420 SoC requires some "PHY tuning" based on the USB speed. This patch delivers dwc3's PHYs to the xhci platform device when it's created. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Tested-by: Vivek Gautam <gautam.vivek@samsung.com> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/**
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* host.c - DesignWare USB3 DRD Controller Host Glue
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*
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
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*
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* Authors: Felipe Balbi <balbi@ti.com>,
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 of
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* the License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/platform_device.h>
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#include <linux/usb/xhci_pdriver.h>
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#include "core.h"
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int dwc3_host_init(struct dwc3 *dwc)
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{
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struct platform_device *xhci;
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struct usb_xhci_pdata pdata;
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int ret;
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xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
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if (!xhci) {
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dev_err(dwc->dev, "couldn't allocate xHCI device\n");
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return -ENOMEM;
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}
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dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
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xhci->dev.parent = dwc->dev;
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xhci->dev.dma_mask = dwc->dev->dma_mask;
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xhci->dev.dma_parms = dwc->dev->dma_parms;
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dwc->xhci = xhci;
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ret = platform_device_add_resources(xhci, dwc->xhci_resources,
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DWC3_XHCI_RESOURCES_NUM);
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if (ret) {
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dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
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goto err1;
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}
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memset(&pdata, 0, sizeof(pdata));
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#ifdef CONFIG_DWC3_HOST_USB3_LPM_ENABLE
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pdata.usb3_lpm_capable = 1;
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#endif
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ret = platform_device_add_data(xhci, &pdata, sizeof(pdata));
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if (ret) {
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dev_err(dwc->dev, "couldn't add platform data to xHCI device\n");
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goto err1;
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}
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phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
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dev_name(&xhci->dev));
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phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
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dev_name(&xhci->dev));
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ret = platform_device_add(xhci);
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if (ret) {
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dev_err(dwc->dev, "failed to register xHCI device\n");
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goto err2;
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}
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return 0;
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err2:
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phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
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dev_name(&xhci->dev));
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phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
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dev_name(&xhci->dev));
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err1:
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platform_device_put(xhci);
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return ret;
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}
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void dwc3_host_exit(struct dwc3 *dwc)
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{
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phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
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dev_name(&dwc->xhci->dev));
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phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
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dev_name(&dwc->xhci->dev));
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platform_device_unregister(dwc->xhci);
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}
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