/* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> * (C) Copyright 2002 Hewlett-Packard Company * (C) Copyright 2003-2005 MontaVista Software Inc. * * Bus Glue for PPC On-Chip OHCI driver * Tested on Freescale MPC5200 and IBM STB04xxx * * Modified by Dale Farnsworth <dale@farnsworth.org> from ohci-sa1111.c * * This file is licenced under the GPL. */ #include <linux/platform_device.h> #include <linux/signal.h> /* configure so an HC device and id are always provided */ /* always called with process context; sleeping is OK */ /** * usb_hcd_ppc_soc_probe - initialize On-Chip HCDs * Context: !in_interrupt() * * Allocates basic resources for this USB host controller. * * Store this function in the HCD's struct pci_driver as probe(). */ static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver, struct platform_device *pdev) { int retval; struct usb_hcd *hcd; struct ohci_hcd *ohci; struct resource *res; int irq; pr_debug("initializing PPC-SOC USB Controller\n"); res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!res) { pr_debug(__FILE__ ": no irq\n"); return -ENODEV; } irq = res->start; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { pr_debug(__FILE__ ": no reg addr\n"); return -ENODEV; } hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB"); if (!hcd) return -ENOMEM; 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)) { pr_debug(__FILE__ ": request_mem_region failed\n"); retval = -EBUSY; goto err1; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { pr_debug(__FILE__ ": ioremap failed\n"); retval = -ENOMEM; goto err2; } ohci = hcd_to_ohci(hcd); ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC; #ifdef CONFIG_PPC_MPC52xx /* MPC52xx doesn't need frame_no shift */ ohci->flags |= OHCI_QUIRK_FRAME_NO; #endif ohci_hcd_init(ohci); retval = usb_add_hcd(hcd, irq, IRQF_DISABLED); if (retval == 0) return retval; pr_debug("Removing PPC-SOC USB Controller\n"); iounmap(hcd->regs); err2: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err1: usb_put_hcd(hcd); return retval; } /* may be called without controller electrically present */ /* may be called with controller, bus, and devices active */ /** * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs * @pdev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of usb_hcd_ppc_soc_probe(). * It is always called from a thread * context, normally "rmmod", "apmd", or something similar. * */ static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd, struct platform_device *pdev) { usb_remove_hcd(hcd); pr_debug("stopping PPC-SOC USB Controller\n"); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); } static int __devinit ohci_ppc_soc_start(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci(hcd); int ret; if ((ret = ohci_init(ohci)) < 0) return ret; if ((ret = ohci_run(ohci)) < 0) { err("can't start %s", ohci_to_hcd(ohci)->self.bus_name); ohci_stop(hcd); return ret; } return 0; } static const struct hc_driver ohci_ppc_soc_hc_driver = { .description = hcd_name, .hcd_priv_size = sizeof(struct ohci_hcd), /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_USB11 | HCD_MEMORY, /* * basic lifecycle operations */ .start = ohci_ppc_soc_start, .stop = ohci_stop, .shutdown = ohci_shutdown, /* * managing i/o requests and associated device resources */ .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, .hub_irq_enable = ohci_rhsc_enable, #ifdef CONFIG_PM .bus_suspend = ohci_bus_suspend, .bus_resume = ohci_bus_resume, #endif .start_port_reset = ohci_start_port_reset, }; static int ohci_hcd_ppc_soc_drv_probe(struct platform_device *pdev) { int ret; if (usb_disabled()) return -ENODEV; ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev); return ret; } static int ohci_hcd_ppc_soc_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); usb_hcd_ppc_soc_remove(hcd, pdev); return 0; } static struct platform_driver ohci_hcd_ppc_soc_driver = { .probe = ohci_hcd_ppc_soc_drv_probe, .remove = ohci_hcd_ppc_soc_drv_remove, .shutdown = usb_hcd_platform_shutdown, #ifdef CONFIG_PM /*.suspend = ohci_hcd_ppc_soc_drv_suspend,*/ /*.resume = ohci_hcd_ppc_soc_drv_resume,*/ #endif .driver = { .name = "ppc-soc-ohci", .owner = THIS_MODULE, }, };