| /* |
| * drivers/usb/host/ehci-vt8500.c |
| * |
| * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> |
| * |
| * Based on ehci-au1xxx.c |
| * |
| * This software is licensed under the terms of the GNU General Public |
| * License version 2, as published by the Free Software Foundation, and |
| * may be copied, distributed, and modified under those terms. |
| * |
| * 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/of.h> |
| #include <linux/platform_device.h> |
| |
| static int ehci_update_device(struct usb_hcd *hcd, struct usb_device *udev) |
| { |
| struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| int rc = 0; |
| |
| if (!udev->parent) /* udev is root hub itself, impossible */ |
| rc = -1; |
| /* we only support lpm device connected to root hub yet */ |
| if (ehci->has_lpm && !udev->parent->parent) { |
| rc = ehci_lpm_set_da(ehci, udev->devnum, udev->portnum); |
| if (!rc) |
| rc = ehci_lpm_check(ehci, udev->portnum); |
| } |
| return rc; |
| } |
| |
| static const struct hc_driver vt8500_ehci_hc_driver = { |
| .description = hcd_name, |
| .product_desc = "VT8500 EHCI", |
| .hcd_priv_size = sizeof(struct ehci_hcd), |
| |
| /* |
| * generic hardware linkage |
| */ |
| .irq = ehci_irq, |
| .flags = HCD_MEMORY | HCD_USB2, |
| |
| /* |
| * basic lifecycle operations |
| */ |
| .reset = ehci_setup, |
| .start = ehci_run, |
| .stop = ehci_stop, |
| .shutdown = ehci_shutdown, |
| |
| /* |
| * managing i/o requests and associated device resources |
| */ |
| .urb_enqueue = ehci_urb_enqueue, |
| .urb_dequeue = ehci_urb_dequeue, |
| .endpoint_disable = ehci_endpoint_disable, |
| .endpoint_reset = ehci_endpoint_reset, |
| |
| /* |
| * scheduling support |
| */ |
| .get_frame_number = ehci_get_frame, |
| |
| /* |
| * root hub support |
| */ |
| .hub_status_data = ehci_hub_status_data, |
| .hub_control = ehci_hub_control, |
| .bus_suspend = ehci_bus_suspend, |
| .bus_resume = ehci_bus_resume, |
| .relinquish_port = ehci_relinquish_port, |
| .port_handed_over = ehci_port_handed_over, |
| |
| /* |
| * call back when device connected and addressed |
| */ |
| .update_device = ehci_update_device, |
| |
| .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
| }; |
| |
| static int vt8500_ehci_drv_probe(struct platform_device *pdev) |
| { |
| struct usb_hcd *hcd; |
| struct ehci_hcd *ehci; |
| struct resource *res; |
| int ret; |
| |
| if (usb_disabled()) |
| return -ENODEV; |
| |
| if (pdev->resource[1].flags != IORESOURCE_IRQ) { |
| pr_debug("resource[1] is not IORESOURCE_IRQ"); |
| return -ENOMEM; |
| } |
| hcd = usb_create_hcd(&vt8500_ehci_hc_driver, &pdev->dev, "VT8500"); |
| if (!hcd) |
| return -ENOMEM; |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| hcd->rsrc_start = res->start; |
| hcd->rsrc_len = resource_size(res); |
| |
| hcd->regs = devm_request_and_ioremap(&pdev->dev, res); |
| if (!hcd->regs) { |
| pr_debug("ioremap failed"); |
| ret = -ENOMEM; |
| goto err1; |
| } |
| |
| ehci = hcd_to_ehci(hcd); |
| ehci->caps = hcd->regs; |
| |
| ret = usb_add_hcd(hcd, pdev->resource[1].start, |
| IRQF_SHARED); |
| if (ret == 0) { |
| platform_set_drvdata(pdev, hcd); |
| return ret; |
| } |
| |
| err1: |
| usb_put_hcd(hcd); |
| return ret; |
| } |
| |
| static int vt8500_ehci_drv_remove(struct platform_device *pdev) |
| { |
| struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| |
| usb_remove_hcd(hcd); |
| usb_put_hcd(hcd); |
| platform_set_drvdata(pdev, NULL); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id vt8500_ehci_ids[] = { |
| { .compatible = "via,vt8500-ehci", }, |
| { .compatible = "wm,prizm-ehci", }, |
| {} |
| }; |
| |
| static struct platform_driver vt8500_ehci_driver = { |
| .probe = vt8500_ehci_drv_probe, |
| .remove = vt8500_ehci_drv_remove, |
| .shutdown = usb_hcd_platform_shutdown, |
| .driver = { |
| .name = "vt8500-ehci", |
| .owner = THIS_MODULE, |
| .of_match_table = of_match_ptr(vt8500_ehci_ids), |
| } |
| }; |
| |
| MODULE_ALIAS("platform:vt8500-ehci"); |
| MODULE_DEVICE_TABLE(of, vt8500_ehci_ids); |