| /* |
| * Bus Glue for Loongson LS1X built-in EHCI controller. |
| * |
| * Copyright (c) 2012 Zhang, Keguang <keguang.zhang@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published |
| * by the Free Software Foundation. |
| */ |
| |
| |
| #include <linux/platform_device.h> |
| |
| static int ehci_ls1x_reset(struct usb_hcd *hcd) |
| { |
| struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| int ret; |
| |
| ehci->caps = hcd->regs; |
| |
| ret = ehci_setup(hcd); |
| if (ret) |
| return ret; |
| |
| ehci_port_power(ehci, 0); |
| |
| return 0; |
| } |
| |
| static const struct hc_driver ehci_ls1x_hc_driver = { |
| .description = hcd_name, |
| .product_desc = "LOONGSON1 EHCI", |
| .hcd_priv_size = sizeof(struct ehci_hcd), |
| |
| /* |
| * generic hardware linkage |
| */ |
| .irq = ehci_irq, |
| .flags = HCD_MEMORY | HCD_USB2, |
| |
| /* |
| * basic lifecycle operations |
| */ |
| .reset = ehci_ls1x_reset, |
| .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, |
| .relinquish_port = ehci_relinquish_port, |
| .port_handed_over = ehci_port_handed_over, |
| |
| .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
| }; |
| |
| static int ehci_hcd_ls1x_probe(struct platform_device *pdev) |
| { |
| struct usb_hcd *hcd; |
| struct resource *res; |
| int irq; |
| int ret; |
| |
| pr_debug("initializing loongson1 ehci USB Controller\n"); |
| |
| if (usb_disabled()) |
| return -ENODEV; |
| |
| res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| if (!res) { |
| dev_err(&pdev->dev, |
| "Found HC with no IRQ. Check %s setup!\n", |
| dev_name(&pdev->dev)); |
| return -ENODEV; |
| } |
| irq = res->start; |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (!res) { |
| dev_err(&pdev->dev, |
| "Found HC with no register addr. Check %s setup!\n", |
| dev_name(&pdev->dev)); |
| return -ENODEV; |
| } |
| |
| hcd = usb_create_hcd(&ehci_ls1x_hc_driver, &pdev->dev, |
| dev_name(&pdev->dev)); |
| if (!hcd) |
| return -ENOMEM; |
| hcd->rsrc_start = res->start; |
| hcd->rsrc_len = resource_size(res); |
| |
| hcd->regs = devm_request_and_ioremap(&pdev->dev, res); |
| if (hcd->regs == NULL) { |
| dev_dbg(&pdev->dev, "error mapping memory\n"); |
| ret = -EFAULT; |
| goto err_put_hcd; |
| } |
| |
| ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED); |
| if (ret) |
| goto err_put_hcd; |
| |
| return ret; |
| |
| err_put_hcd: |
| usb_put_hcd(hcd); |
| return ret; |
| } |
| |
| static int ehci_hcd_ls1x_remove(struct platform_device *pdev) |
| { |
| struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| |
| usb_remove_hcd(hcd); |
| usb_put_hcd(hcd); |
| |
| return 0; |
| } |
| |
| static struct platform_driver ehci_ls1x_driver = { |
| .probe = ehci_hcd_ls1x_probe, |
| .remove = ehci_hcd_ls1x_remove, |
| .shutdown = usb_hcd_platform_shutdown, |
| .driver = { |
| .name = "ls1x-ehci", |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ls1x-ehci"); |