diff options
Diffstat (limited to 'drivers/usb/dwc3/host.c')
| -rw-r--r-- | drivers/usb/dwc3/host.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c new file mode 100644 index 000000000..1a3878a3b --- /dev/null +++ b/drivers/usb/dwc3/host.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0 +/** + * host.c - DesignWare USB3 DRD Controller Host Glue + * + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + */ + +#include <linux/platform_device.h> + +#include "core.h" + +static int dwc3_host_get_irq(struct dwc3 *dwc) +{ + struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); + int irq; + + irq = platform_get_irq_byname(dwc3_pdev, "host"); + if (irq > 0) + goto out; + + if (irq == -EPROBE_DEFER) + goto out; + + irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3"); + if (irq > 0) + goto out; + + if (irq == -EPROBE_DEFER) + goto out; + + irq = platform_get_irq(dwc3_pdev, 0); + if (irq > 0) + goto out; + + if (irq != -EPROBE_DEFER) + dev_err(dwc->dev, "missing host IRQ\n"); + + if (!irq) + irq = -EINVAL; + +out: + return irq; +} + +int dwc3_host_init(struct dwc3 *dwc) +{ + struct property_entry props[3]; + struct platform_device *xhci; + int ret, irq; + struct resource *res; + struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); + int prop_idx = 0; + + irq = dwc3_host_get_irq(dwc); + if (irq < 0) + return irq; + + res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host"); + if (!res) + res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, + "dwc_usb3"); + if (!res) + res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0); + if (!res) + return -ENOMEM; + + dwc->xhci_resources[1].start = irq; + dwc->xhci_resources[1].end = irq; + dwc->xhci_resources[1].flags = res->flags; + dwc->xhci_resources[1].name = res->name; + + xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); + if (!xhci) { + dev_err(dwc->dev, "couldn't allocate xHCI device\n"); + return -ENOMEM; + } + + xhci->dev.parent = dwc->dev; + + dwc->xhci = xhci; + + ret = platform_device_add_resources(xhci, dwc->xhci_resources, + DWC3_XHCI_RESOURCES_NUM); + if (ret) { + dev_err(dwc->dev, "couldn't add resources to xHCI device\n"); + goto err1; + } + + memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); + + if (dwc->usb3_lpm_capable) + props[prop_idx++].name = "usb3-lpm-capable"; + + /** + * WORKAROUND: dwc3 revisions <=3.00a have a limitation + * where Port Disable command doesn't work. + * + * The suggested workaround is that we avoid Port Disable + * completely. + * + * This following flag tells XHCI to do just that. + */ + if (dwc->revision <= DWC3_REVISION_300A) + props[prop_idx++].name = "quirk-broken-port-ped"; + + if (prop_idx) { + ret = platform_device_add_properties(xhci, props); + if (ret) { + dev_err(dwc->dev, "failed to add properties to xHCI\n"); + goto err1; + } + } + + phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy", + dev_name(dwc->dev)); + phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy", + dev_name(dwc->dev)); + + ret = platform_device_add(xhci); + if (ret) { + dev_err(dwc->dev, "failed to register xHCI device\n"); + goto err2; + } + + return 0; +err2: + phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy", + dev_name(dwc->dev)); + phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", + dev_name(dwc->dev)); +err1: + platform_device_put(xhci); + return ret; +} + +void dwc3_host_exit(struct dwc3 *dwc) +{ + phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy", + dev_name(dwc->dev)); + phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", + dev_name(dwc->dev)); + platform_device_unregister(dwc->xhci); +} |