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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/usb/dwc3/host.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/usb/dwc3/host.c')
-rw-r--r-- | drivers/usb/dwc3/host.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c new file mode 100644 index 000000000..f6f13e7f1 --- /dev/null +++ b/drivers/usb/dwc3/host.c @@ -0,0 +1,139 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * host.c - DesignWare USB3 DRD Controller Host Glue + * + * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + */ + +#include <linux/irq.h> +#include <linux/of.h> +#include <linux/platform_device.h> + +#include "core.h" + +static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc, + int irq, char *name) +{ + struct platform_device *pdev = to_platform_device(dwc->dev); + struct device_node *np = dev_of_node(&pdev->dev); + + dwc->xhci_resources[1].start = irq; + dwc->xhci_resources[1].end = irq; + dwc->xhci_resources[1].flags = IORESOURCE_IRQ | irq_get_trigger_type(irq); + if (!name && np) + dwc->xhci_resources[1].name = of_node_full_name(pdev->dev.of_node); + else + dwc->xhci_resources[1].name = name; +} + +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_optional(dwc3_pdev, "host"); + if (irq > 0) { + dwc3_host_fill_xhci_irq_res(dwc, irq, "host"); + goto out; + } + + if (irq == -EPROBE_DEFER) + goto out; + + irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3"); + if (irq > 0) { + dwc3_host_fill_xhci_irq_res(dwc, irq, "dwc_usb3"); + goto out; + } + + if (irq == -EPROBE_DEFER) + goto out; + + irq = platform_get_irq(dwc3_pdev, 0); + if (irq > 0) { + dwc3_host_fill_xhci_irq_res(dwc, irq, NULL); + goto out; + } + + if (!irq) + irq = -EINVAL; + +out: + return irq; +} + +int dwc3_host_init(struct dwc3 *dwc) +{ + struct property_entry props[4]; + struct platform_device *xhci; + int ret, irq; + int prop_idx = 0; + + irq = dwc3_host_get_irq(dwc); + if (irq < 0) + return irq; + + 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 err; + } + + memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); + + if (dwc->usb3_lpm_capable) + props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable"); + + if (dwc->usb2_lpm_disable) + props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable"); + + /** + * 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 (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A)) + props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped"); + + if (prop_idx) { + ret = device_create_managed_software_node(&xhci->dev, props, NULL); + if (ret) { + dev_err(dwc->dev, "failed to add properties to xHCI\n"); + goto err; + } + } + + ret = platform_device_add(xhci); + if (ret) { + dev_err(dwc->dev, "failed to register xHCI device\n"); + goto err; + } + + return 0; +err: + platform_device_put(xhci); + return ret; +} + +void dwc3_host_exit(struct dwc3 *dwc) +{ + platform_device_unregister(dwc->xhci); + dwc->xhci = NULL; +} |