/* * SuperH EHCI host controller driver * * Copyright (C) 2010 Paul Mundt * * Based on ohci-sh.c and ehci-atmel.c. * * 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 struct ehci_sh_priv { struct clk *iclk, *fclk; struct usb_hcd *hcd; }; static int ehci_sh_reset(struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); ehci->caps = hcd->regs; return ehci_setup(hcd); } static const struct hc_driver ehci_sh_hc_driver = { .description = hcd_name, .product_desc = "SuperH EHCI", .hcd_priv_size = sizeof(struct ehci_hcd), /* * generic hardware linkage */ .irq = ehci_irq, .flags = HCD_USB2 | HCD_MEMORY | HCD_BH, /* * basic lifecycle operations */ .reset = ehci_sh_reset, .start = ehci_run, .stop = ehci_stop, .shutdown = ehci_shutdown, /* * managing i/o requests and associated device resources */ .urb_enqueue = ehci_urb_enqueue, .urb_dequeue = ehci_urb_dequeue, .endpoint_disable = ehci_endpoint_disable, .endpoint_reset = ehci_endpoint_reset, /* * scheduling support */ .get_frame_number = ehci_get_frame, /* * root hub support */ .hub_status_data = ehci_hub_status_data, .hub_control = ehci_hub_control, #ifdef CONFIG_PM .bus_suspend = ehci_bus_suspend, .bus_resume = ehci_bus_resume, #endif .relinquish_port = ehci_relinquish_port, .port_handed_over = ehci_port_handed_over, .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, }; static int ehci_hcd_sh_probe(struct platform_device *pdev) { struct resource *res; struct ehci_sh_priv *priv; struct ehci_sh_platdata *pdata; struct usb_hcd *hcd; int irq, ret; if (usb_disabled()) return -ENODEV; irq = platform_get_irq(pdev, 0); if (irq <= 0) { dev_err(&pdev->dev, "Found HC with no IRQ. Check %s setup!\n", dev_name(&pdev->dev)); ret = -ENODEV; goto fail_create_hcd; } pdata = dev_get_platdata(&pdev->dev); /* initialize hcd */ hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev, dev_name(&pdev->dev)); if (!hcd) { ret = -ENOMEM; goto fail_create_hcd; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); hcd->regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(hcd->regs)) { ret = PTR_ERR(hcd->regs); goto fail_request_resource; } hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv), GFP_KERNEL); if (!priv) { ret = -ENOMEM; goto fail_request_resource; } /* These are optional, we don't care if they fail */ priv->fclk = devm_clk_get(&pdev->dev, "usb_fck"); if (IS_ERR(priv->fclk)) priv->fclk = NULL; priv->iclk = devm_clk_get(&pdev->dev, "usb_ick"); if (IS_ERR(priv->iclk)) priv->iclk = NULL; clk_enable(priv->fclk); clk_enable(priv->iclk); if (pdata && pdata->phy_init) pdata->phy_init(); ret = usb_add_hcd(hcd, irq, IRQF_SHARED); if (ret != 0) { dev_err(&pdev->dev, "Failed to add hcd"); goto fail_add_hcd; } device_wakeup_enable(hcd->self.controller); priv->hcd = hcd; platform_set_drvdata(pdev, priv); return ret; fail_add_hcd: clk_disable(priv->iclk); clk_disable(priv->fclk); fail_request_resource: usb_put_hcd(hcd); fail_create_hcd: dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret); return ret; } static int ehci_hcd_sh_remove(struct platform_device *pdev) { struct ehci_sh_priv *priv = platform_get_drvdata(pdev); struct usb_hcd *hcd = priv->hcd; usb_remove_hcd(hcd); usb_put_hcd(hcd); clk_disable(priv->fclk); clk_disable(priv->iclk); return 0; } static void ehci_hcd_sh_shutdown(struct platform_device *pdev) { struct ehci_sh_priv *priv = platform_get_drvdata(pdev); struct usb_hcd *hcd = priv->hcd; if (hcd->driver->shutdown) hcd->driver->shutdown(hcd); } static struct platform_driver ehci_hcd_sh_driver = { .probe = ehci_hcd_sh_probe, .remove = ehci_hcd_sh_remove, .shutdown = ehci_hcd_sh_shutdown, .driver = { .name = "sh_ehci", }, }; MODULE_ALIAS("platform:sh_ehci"); ect>space:mode:
authorDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-12 17:15:56 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-30 10:17:32 +0100
commite6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0 (patch)
tree77cadb6d8aad1b52c34e4afa8c9deef603bbe2ed /sound/isa/Kconfig
parent4e5b54f127426c82dc2816340c26d951a5bb3429 (diff)
drm: Don't race connector registration
I was under the misconception that the sysfs dev stuff can be fully set up, and then registered all in one step with device_add. That's true for properties and property groups, but not for parents and child devices. Those must be fully registered before you can register a child. Add a bit of tracking to make sure that asynchronous mst connector hotplugging gets this right. For consistency we rely upon the implicit barriers of the connector->mutex, which is taken anyway, to ensure that at least either the connector or device registration call will work out. Mildly tested since I can't reliably reproduce this on my mst box here. Reported-by: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'sound/isa/Kconfig')