/* * Driver for EHCI HCD on SPEAr SOC * * Copyright (C) 2010 ST Micro Electronics, * Deepak Sikri * * Based on various ehci-*.c drivers * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive for * more details. */ #include #include #include #include #include #include #include #include #include #include #include #include "ehci.h" #define DRIVER_DESC "EHCI SPEAr driver" static const char hcd_name[] = "SPEAr-ehci"; struct spear_ehci { struct clk *clk; }; #define to_spear_ehci(hcd) (struct spear_ehci *)(hcd_to_ehci(hcd)->priv) static struct hc_driver __read_mostly ehci_spear_hc_driver; #ifdef CONFIG_PM_SLEEP static int ehci_spear_drv_suspend(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); bool do_wakeup = device_may_wakeup(dev); return ehci_suspend(hcd, do_wakeup); } static int ehci_spear_drv_resume(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); ehci_resume(hcd, false); return 0; } #endif /* CONFIG_PM_SLEEP */ static SIMPLE_DEV_PM_OPS(ehci_spear_pm_ops, ehci_spear_drv_suspend, ehci_spear_drv_resume); static int spear_ehci_hcd_drv_probe(struct platform_device *pdev) { struct usb_hcd *hcd ; struct spear_ehci *sehci; struct resource *res; struct clk *usbh_clk; const struct hc_driver *driver = &ehci_spear_hc_driver; int irq, retval; if (usb_disabled()) return -ENODEV; irq = platform_get_irq(pdev, 0); if (irq < 0) { retval = irq; goto fail; } /* * 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. */ retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); if (retval) goto fail; usbh_clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(usbh_clk)) { dev_err(&pdev->dev, "Error getting interface clock\n"); retval = PTR_ERR(usbh_clk); goto fail; } hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); if (!hcd) { retval = -ENOMEM; goto fail; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); hcd->regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(hcd->regs)) { retval = PTR_ERR(hcd->regs); goto err_put_hcd; } hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); sehci = to_spear_ehci(hcd); sehci->clk = usbh_clk; /* registers start at offset 0x0 */ hcd_to_ehci(hcd)->caps = hcd->regs; clk_prepare_enable(sehci->clk); retval = usb_add_hcd(hcd, irq, IRQF_SHARED); if (retval) goto err_stop_ehci; device_wakeup_enable(hcd->self.controller); return retval; err_stop_ehci: clk_disable_unprepare(sehci->clk); err_put_hcd: usb_put_hcd(hcd); fail: dev_err(&pdev->dev, "init fail, %d\n", retval); return retval ; } static int spear_ehci_hcd_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); struct spear_ehci *sehci = to_spear_ehci(hcd); usb_remove_hcd(hcd); if (sehci->clk) clk_disable_unprepare(sehci->clk); usb_put_hcd(hcd); return 0; } static const struct of_device_id spear_ehci_id_table[] = { { .compatible = "st,spear600-ehci", }, { }, }; MODULE_DEVICE_TABLE(of, spear_ehci_id_table); static struct platform_driver spear_ehci_hcd_driver = { .probe = spear_ehci_hcd_drv_probe, .remove = spear_ehci_hcd_drv_remove, .shutdown = usb_hcd_platform_shutdown, .driver = { .name = "spear-ehci", .bus = &platform_bus_type, .pm = &ehci_spear_pm_ops, .of_match_table = spear_ehci_id_table, } }; static const struct ehci_driver_overrides spear_overrides __initconst = { .extra_priv_size = sizeof(struct spear_ehci), }; static int __init ehci_spear_init(void) { if (usb_disabled()) return -ENODEV; pr_info("%s: " DRIVER_DESC "\n", hcd_name); ehci_init_driver(&ehci_spear_hc_driver, &spear_overrides); return platform_driver_register(&spear_ehci_hcd_driver); } module_init(ehci_spear_init); static void __exit ehci_spear_cleanup(void) { platform_driver_unregister(&spear_ehci_hcd_driver); } module_exit(ehci_spear_cleanup); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_ALIAS("platform:spear-ehci"); MODULE_AUTHOR("Deepak Sikri"); MODULE_LICENSE("GPL"); on>space:mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2017-02-06 19:36:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-06 19:36:04 -0800
commit8b1b41ee74f9712c355d66dc105bbea663ae0afd (patch)
tree4c3f410f3cb01c7b00b474e376a60f27a7ff99a8 /drivers/usb/host/oxu210hp-hcd.c
parentf7d6040aa45df6ffd9e891114125dc919f18b96b (diff)
parentbfb34527a32a1a576d9bfb7026d3ab0369a6cd60 (diff)
Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams: "None of these are showstoppers for 4.10 and could wait for 4.11 merge window, but they are low enough risk for this late in the cycle and the fixes have waiting users . They have received a build success notification from the 0day robot, pass the latest ndctl unit tests, and appeared in next: - Fix a crash that can result when SIGINT is sent to a process that is awaiting completion of an address range scrub command. We were not properly cleaning up the workqueue after wait_event_interruptible(). - Fix a memory hotplug failure condition that results from not reserving enough space out of persistent memory for the memmap. By default we align to 2M allocations that the memory hotplug code assumes, but if the administrator specifies a non-default 4K-alignment then we can fail to correctly size the reservation. - A one line fix to improve the predictability of libnvdimm block device names. A common operation is to reconfigure /dev/pmem0 into a different mode. For example, a reconfiguration might set a new mode that reserves some of the capacity for a struct page memmap array. It surprises users if the device name changes to "/dev/pmem0.1" after the mode change and then back to /dev/pmem0 after a reboot. - Add 'const' to some function pointer tables" * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: libnvdimm, pfn: fix memmap reservation size versus 4K alignment acpi, nfit: fix acpi_nfit_flush_probe() crash libnvdimm, namespace: do not delete namespace-id 0 nvdimm: constify device_type structures
Diffstat (limited to 'drivers/usb/host/oxu210hp-hcd.c')