/* * 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/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_init, .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); if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { pr_debug("request_mem_region failed"); ret = -EBUSY; goto err1; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { pr_debug("ioremap failed"); ret = -ENOMEM; goto err2; } ehci = hcd_to_ehci(hcd); ehci->caps = hcd->regs; ehci->regs = hcd->regs + HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase)); dbg_hcs_params(ehci, "reset"); dbg_hcc_params(ehci, "reset"); /* cache this readonly data; minimize chip reads */ ehci->hcs_params = readl(&ehci->caps->hcs_params); ehci_port_power(ehci, 1); ehci_reset(ehci); ret = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED); if (ret == 0) { platform_set_drvdata(pdev, hcd); return ret; } iounmap(hcd->regs); err2: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 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); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); platform_set_drvdata(pdev, NULL); return 0; } 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, } }; MODULE_ALIAS("platform:vt8500-ehci");