/* * ohci-omap3.c - driver for OHCI on OMAP3 and later processors * * Bus Glue for OMAP3 USBHOST 3 port OHCI controller * This controller is also used in later OMAPs and AM35x chips * * Copyright (C) 2007-2010 Texas Instruments, Inc. * Author: Vikram Pandita * Author: Anand Gadiyar * Author: Keshava Munegowda * * Based on ehci-omap.c and some other ohci glue layers * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * TODO (last updated Feb 27, 2011): * - add kernel-doc */ #include #include #include #include #include #include #include #include #include #include "ohci.h" #define DRIVER_DESC "OHCI OMAP3 driver" static const char hcd_name[] = "ohci-omap3"; static struct hc_driver __read_mostly ohci_omap3_hc_driver; /* * configure so an HC device and id are always provided * always called with process context; sleeping is OK */ /** * ohci_hcd_omap3_probe - initialize OMAP-based HCDs * * Allocates basic resources for this USB host controller, and * then invokes the start() method for the HCD associated with it * through the hotplug entry's driver_data. */ static int ohci_hcd_omap3_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct ohci_hcd *ohci; struct usb_hcd *hcd = NULL; void __iomem *regs = NULL; struct resource *res; int ret; int irq; if (usb_disabled()) return -ENODEV; if (!dev->parent) { dev_err(dev, "Missing parent device\n"); return -ENODEV; } irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_err(dev, "OHCI irq failed\n"); return -ENODEV; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(dev, "UHH OHCI get resource failed\n"); return -ENOMEM; } regs = ioremap(res->start, resource_size(res)); if (!regs) { dev_err(dev, "UHH OHCI ioremap failed\n"); return -ENOMEM; } /* * Right now device-tree probed devices don't get dma_mask set. * Since shared usb code relies on it, set it here for now. * Once we have dma capability bindings this can go away. */ ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32)); if (ret) goto err_io; ret = -ENODEV; hcd = usb_create_hcd(&ohci_omap3_hc_driver, dev, dev_name(dev)); if (!hcd) { dev_err(dev, "usb_create_hcd failed\n"); goto err_io; } hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); hcd->regs = regs; pm_runtime_enable(dev); pm_runtime_get_sync(dev); ohci = hcd_to_ohci(hcd); /* * RemoteWakeupConnected has to be set explicitly before * calling ohci_run. The reset value of RWC is 0. */ ohci->hc_control = OHCI_CTRL_RWC; ret = usb_add_hcd(hcd, irq, 0); if (ret) { dev_dbg(dev, "failed to add hcd with err %d\n", ret); goto err_add_hcd; } device_wakeup_enable(hcd->self.controller); return 0; err_add_hcd: pm_runtime_put_sync(dev); usb_put_hcd(hcd); err_io: iounmap(regs); return ret; } /* * may be called without controller electrically present * may be called with controller, bus, and devices active */ /** * ohci_hcd_omap3_remove - shutdown processing for OHCI HCDs * @pdev: USB Host Controller being removed * * Reverses the effect of ohci_hcd_omap3_probe(), first invoking * the HCD's stop() method. It is always called from a thread * context, normally "rmmod", "apmd", or something similar. */ static int ohci_hcd_omap3_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct usb_hcd *hcd = dev_get_drvdata(dev); iounmap(hcd->regs); usb_remove_hcd(hcd); pm_runtime_put_sync(dev); pm_runtime_disable(dev); usb_put_hcd(hcd); return 0; } static const struct of_device_id omap_ohci_dt_ids[] = { { .compatible = "ti,ohci-omap3" }, { } }; MODULE_DEVICE_TABLE(of, omap_ohci_dt_ids); static struct platform_driver ohci_hcd_omap3_driver = { .probe = ohci_hcd_omap3_probe, .remove = ohci_hcd_omap3_remove, .shutdown = usb_hcd_platform_shutdown, .driver = { .name = "ohci-omap3", .of_match_table = omap_ohci_dt_ids, }, }; static int __init ohci_omap3_init(void) { if (usb_disabled()) return -ENODEV; pr_info("%s: " DRIVER_DESC "\n", hcd_name); ohci_init_driver(&ohci_omap3_hc_driver, NULL); return platform_driver_register(&ohci_hcd_omap3_driver); } module_init(ohci_omap3_init); static void __exit ohci_omap3_cleanup(void) { platform_driver_unregister(&ohci_hcd_omap3_driver); } module_exit(ohci_omap3_cleanup); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_ALIAS("platform:ohci-omap3"); MODULE_AUTHOR("Anand Gadiyar "); MODULE_LICENSE("GPL"); h>parent9da96f99f15169b8bf77a1f27ed6d926f82ea59f (diff)parent3e4f7a4956e54143f7fc15c636158ad4166d219d (diff)
Merge branch 'rcu-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU fixes from Ingo Molnar: "This fixes sporadic ACPI related hangs in synchronize_rcu() that were caused by the ACPI code mistakenly relying on an aspect of RCU that was neither promised to work nor reliable but which happened to work - until in v4.9 we changed the RCU implementation, which made the hangs more prominent. Since the mis-use of the RCU facility wasn't properly detected and prevented either, these fixes make the RCU side work reliably instead of working around the problem in the ACPI code. Hence the slightly larger diffstat that goes beyond the normal scope of RCU fixes in -rc kernels" * 'rcu-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: rcu: Narrow early boot window of illegal synchronous grace periods rcu: Remove cond_resched() from Tiny synchronize_sched()
Diffstat (limited to 'sound/pci/hda')