/* * OHCI HCD (Host Controller Driver) for USB. * * Bus Glue for Atheros AR71xx built-in OHCI controller. * * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org> * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> * * Parts of this file are based on Atheros' 2.6.15 BSP * Copyright (C) 2007 Atheros Communications, Inc. * * 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> #include <linux/delay.h> extern int usb_disabled(void); static int usb_hcd_ar71xx_probe(const struct hc_driver *driver, struct platform_device *pdev) { struct usb_hcd *hcd; struct resource *res; int irq; int ret; res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!res) { dev_dbg(&pdev->dev, "no IRQ specified for %s\n", dev_name(&pdev->dev)); return -ENODEV; } irq = res->start; hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); if (!hcd) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_dbg(&pdev->dev, "no base address specified for %s\n", dev_name(&pdev->dev)); ret = -ENODEV; goto err_put_hcd; } hcd->rsrc_start = res->start; hcd->rsrc_len = res->end - res->start + 1; if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { dev_dbg(&pdev->dev, "controller already in use\n"); ret = -EBUSY; goto err_put_hcd; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { dev_dbg(&pdev->dev, "error mapping memory\n"); ret = -EFAULT; goto err_release_region; } ohci_hcd_init(hcd_to_ohci(hcd)); ret = usb_add_hcd(hcd, irq, IRQF_DISABLED); if (ret) goto err_stop_hcd; return 0; err_stop_hcd: iounmap(hcd->regs); err_release_region: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err_put_hcd: usb_put_hcd(hcd); return ret; } void usb_hcd_ar71xx_remove(struct usb_hcd *hcd, struct platform_device *pdev) { usb_remove_hcd(hcd); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); } static int __devinit ohci_ar71xx_start(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci(hcd); int ret; ret = ohci_init(ohci); if (ret < 0) return ret; ret = ohci_run(ohci); if (ret < 0) goto err; return 0; err: ohci_stop(hcd); return ret; } static const struct hc_driver ohci_ar71xx_hc_driver = { .description = hcd_name, .product_desc = "Atheros AR71xx built-in OHCI controller", .hcd_priv_size = sizeof(struct ohci_hcd), .irq = ohci_irq, .flags = HCD_USB11 | HCD_MEMORY, .start = ohci_ar71xx_start, .stop = ohci_stop, .shutdown = ohci_shutdown, .urb_enqueue = ohci_urb_enqueue, .urb_dequeue = ohci_urb_dequeue, .endpoint_disable = ohci_endpoint_disable, /* * scheduling support */ .get_frame_number = ohci_get_frame, /* * root hub support */ .hub_status_data = ohci_hub_status_data, .hub_control = ohci_hub_control, .start_port_reset = ohci_start_port_reset, }; static int ohci_hcd_ar71xx_drv_probe(struct platform_device *pdev) { if (usb_disabled()) return -ENODEV; return usb_hcd_ar71xx_probe(&ohci_ar71xx_hc_driver, pdev); } static int ohci_hcd_ar71xx_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); usb_hcd_ar71xx_remove(hcd, pdev); return 0; } MODULE_ALIAS("platform:ar71xx-ohci"); static struct platform_driver ohci_hcd_ar71xx_driver = { .probe = ohci_hcd_ar71xx_drv_probe, .remove = ohci_hcd_ar71xx_drv_remove, .shutdown = usb_hcd_platform_shutdown, .driver = { .name = "ar71xx-ohci", .owner = THIS_MODULE, }, };