/* * 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 2006 Sylvain Munaut <tnt@246tNt.com> * * Bus glue for OHCI HC on the of_platform bus * * Modified for of_platform bus from ohci-sa1111.c * * This file is licenced under the GPL. */ #include <linux/signal.h> #include <linux/of_platform.h> #include <asm/prom.h> static int __devinit ohci_ppc_of_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) { dev_err(hcd->self.controller, "can't start %s\n", hcd->self.bus_name); ohci_stop(hcd); return ret; } return 0; } static const struct hc_driver ohci_ppc_of_hc_driver = { .description = hcd_name, .product_desc = "OF OHCI", .hcd_priv_size = sizeof(struct ohci_hcd), /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_USB11 | HCD_MEMORY, /* * basic lifecycle operations */ .start = ohci_ppc_of_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, #ifdef CONFIG_PM .bus_suspend = ohci_bus_suspend, .bus_resume = ohci_bus_resume, #endif .start_port_reset = ohci_start_port_reset, }; static int __devinit ohci_hcd_ppc_of_probe(struct platform_device *op) { struct device_node *dn = op->dev.of_node; struct usb_hcd *hcd; struct ohci_hcd *ohci; struct resource res; int irq; int rv; int is_bigendian; struct device_node *np; if (usb_disabled()) return -ENODEV; is_bigendian = of_device_is_compatible(dn, "ohci-bigendian") || of_device_is_compatible(dn, "ohci-be"); dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n"); rv = of_address_to_resource(dn, 0, &res); if (rv) return rv; hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB"); if (!hcd) return -ENOMEM; hcd->rsrc_start = res.start; hcd->rsrc_len = resource_size(&res); if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__); rv = -EBUSY; goto err_rmr; } irq = irq_of_parse_and_map(dn, 0); if (irq == NO_IRQ) { printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__); rv = -EBUSY; goto err_irq; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { printk(KERN_ERR "%s: ioremap failed\n", __FILE__); rv = -ENOMEM; goto err_ioremap; } ohci = hcd_to_ohci(hcd); if (is_bigendian) { ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC; if (of_device_is_compatible(dn, "fsl,mpc5200-ohci")) ohci->flags |= OHCI_QUIRK_FRAME_NO; if (of_device_is_compatible(dn, "mpc5200-ohci")) ohci->flags |= OHCI_QUIRK_FRAME_NO; } ohci_hcd_init(ohci); rv = usb_add_hcd(hcd, irq, 0); if (rv == 0) return 0; /* by now, 440epx is known to show usb_23 erratum */ np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx"); /* Work around - At this point ohci_run has executed, the * controller is running, everything, the root ports, etc., is * set up. If the ehci driver is loaded, put the ohci core in * the suspended state. The ehci driver will bring it out of * suspended state when / if a non-high speed USB device is * attached to the USB Host port. If the ehci driver is not * loaded, do nothing. request_mem_region is used to test if * the ehci driver is loaded. */ if (np != NULL) { if (!of_address_to_resource(np, 0, &res)) { if (!request_mem_region(res.start, 0x4, hcd_name)) { writel_be((readl_be(&ohci->regs->control) | OHCI_USB_SUSPEND), &ohci->regs->control); (void) readl_be(&ohci->regs->control); } else release_mem_region(res.start, 0x4); } else pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__); } iounmap(hcd->regs); err_ioremap: irq_dispose_mapping(irq); err_irq: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err_rmr: usb_put_hcd(hcd); return rv; } static int ohci_hcd_ppc_of_remove(struct platform_device *op) { struct usb_hcd *hcd = dev_get_drvdata(&op->dev); dev_set_drvdata(&op->dev, NULL); dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n"); usb_remove_hcd(hcd); iounmap(hcd->regs); irq_dispose_mapping(hcd->irq); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); return 0; } static void ohci_hcd_ppc_of_shutdown(struct platform_device *op) { struct usb_hcd *hcd = dev_get_drvdata(&op->dev); if (hcd->driver->shutdown) hcd->driver->shutdown(hcd); } static const struct of_device_id ohci_hcd_ppc_of_match[] = { #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE { .name = "usb", .compatible = "ohci-bigendian", }, { .name = "usb", .compatible = "ohci-be", }, #endif #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE { .name = "usb", .compatible = "ohci-littledian", }, { .name = "usb", .compatible = "ohci-le", }, #endif {}, }; MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match); #if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \ !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE) #error "No endianness selected for ppc-of-ohci" #endif static struct platform_driver ohci_hcd_ppc_of_driver = { .probe = ohci_hcd_ppc_of_probe, .remove = ohci_hcd_ppc_of_remove, .shutdown = ohci_hcd_ppc_of_shutdown, .driver = { .name = "ppc-of-ohci", .owner = THIS_MODULE, .of_match_table = ohci_hcd_ppc_of_match, }, };