/* * Copyright (C) 2011 Marvell International Ltd. All rights reserved. * Author: Chao Xie * Neil Zhang * * 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. */ #include #include #include #include #include #include #include #define CAPLENGTH_MASK (0xff) struct ehci_hcd_mv { struct usb_hcd *hcd; /* Which mode does this ehci running OTG/Host ? */ int mode; void __iomem *phy_regs; void __iomem *cap_regs; void __iomem *op_regs; struct usb_phy *otg; struct mv_usb_platform_data *pdata; struct clk *clk; }; static void ehci_clock_enable(struct ehci_hcd_mv *ehci_mv) { clk_prepare_enable(ehci_mv->clk); } static void ehci_clock_disable(struct ehci_hcd_mv *ehci_mv) { clk_disable_unprepare(ehci_mv->clk); } static int mv_ehci_enable(struct ehci_hcd_mv *ehci_mv) { int retval; ehci_clock_enable(ehci_mv); if (ehci_mv->pdata->phy_init) { retval = ehci_mv->pdata->phy_init(ehci_mv->phy_regs); if (retval) return retval; } return 0; } static void mv_ehci_disable(struct ehci_hcd_mv *ehci_mv) { if (ehci_mv->pdata->phy_deinit) ehci_mv->pdata->phy_deinit(ehci_mv->phy_regs); ehci_clock_disable(ehci_mv); } static int mv_ehci_reset(struct usb_hcd *hcd) { struct device *dev = hcd->self.controller; struct ehci_hcd_mv *ehci_mv = dev_get_drvdata(dev); int retval; if (ehci_mv == NULL) { dev_err(dev, "Can not find private ehci data\n"); return -ENODEV; } hcd->has_tt = 1; retval = ehci_setup(hcd); if (retval) dev_err(dev, "ehci_setup failed %d\n", retval); return retval; } static const struct hc_driver mv_ehci_hc_driver = { .description = hcd_name, .product_desc = "Marvell EHCI", .hcd_priv_size = sizeof(struct ehci_hcd), /* * generic hardware linkage */ .irq = ehci_irq, .flags = HCD_MEMORY | HCD_USB2 | HCD_BH, /* * basic lifecycle operations */ .reset = mv_ehci_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, .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, /* * scheduling support */ .get_frame_number = ehci_get_frame, /* * root hub support */ .hub_status_data = ehci_hub_status_data, .hub_control = ehci_hub_control, .bus_suspend = ehci_bus_suspend, .bus_resume = ehci_bus_resume, }; static int mv_ehci_probe(struct platform_device *pdev) { struct mv_usb_platform_data *pdata = dev_get_platdata(&pdev->dev); struct usb_hcd *hcd; struct ehci_hcd *ehci; struct ehci_hcd_mv *ehci_mv; struct resource *r; int retval = -ENODEV; u32 offset; if (!pdata) { dev_err(&pdev->dev, "missing platform_data\n"); return -ENODEV; } if (usb_disabled()) return -ENODEV; hcd = usb_create_hcd(&mv_ehci_hc_driver, &pdev->dev, "mv ehci"); if (!hcd) return -ENOMEM; ehci_mv = devm_kzalloc(&pdev->dev, sizeof(*ehci_mv), GFP_KERNEL); if (ehci_mv == NULL) { retval = -ENOMEM; goto err_put_hcd; } platform_set_drvdata(pdev, ehci_mv); ehci_mv->pdata = pdata; ehci_mv->hcd = hcd; ehci_mv->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(ehci_mv->clk)) { dev_err(&pdev->dev, "error getting clock\n"); retval = PTR_ERR(ehci_mv->clk); goto err_put_hcd; } r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phyregs"); ehci_mv->phy_regs = devm_ioremap_resource(&pdev->dev, r); if (IS_ERR(ehci_mv->phy_regs)) { retval = PTR_ERR(ehci_mv->phy_regs); goto err_put_hcd; } r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "capregs"); ehci_mv->cap_regs = devm_ioremap_resource(&pdev->dev, r); if (IS_ERR(ehci_mv->cap_regs)) { retval = PTR_ERR(ehci_mv->cap_regs); goto err_put_hcd; } retval = mv_ehci_enable(ehci_mv); if (retval) { dev_err(&pdev->dev, "init phy error %d\n", retval); goto err_put_hcd; } offset = readl(ehci_mv->cap_regs) & CAPLENGTH_MASK; ehci_mv->op_regs = (void __iomem *) ((unsigned long) ehci_mv->cap_regs + offset); hcd->rsrc_start = r->start; hcd->rsrc_len = resource_size(r); hcd->regs = ehci_mv->op_regs; hcd->irq = platform_get_irq(pdev, 0); if (!hcd->irq) { dev_err(&pdev->dev, "Cannot get irq."); retval = -ENODEV; goto err_disable_clk; } ehci = hcd_to_ehci(hcd); ehci->caps = (struct ehci_caps *) ehci_mv->cap_regs; ehci_mv->mode = pdata->mode; if (ehci_mv->mode == MV_USB_MODE_OTG) { ehci_mv->otg = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2); if (IS_ERR(ehci_mv->otg)) { retval = PTR_ERR(ehci_mv->otg); if (retval == -ENXIO) dev_info(&pdev->dev, "MV_USB_MODE_OTG " "must have CONFIG_USB_PHY enabled\n"); else dev_err(&pdev->dev, "unable to find transceiver\n"); goto err_disable_clk; } retval = otg_set_host(ehci_mv->otg->otg, &hcd->self); if (retval < 0) { dev_err(&pdev->dev, "unable to register with transceiver\n"); retval = -ENODEV; goto err_disable_clk; } /* otg will enable clock before use as host */ mv_ehci_disable(ehci_mv); } else { if (pdata->set_vbus) pdata->set_vbus(1); retval = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED); if (retval) { dev_err(&pdev->dev, "failed to add hcd with err %d\n", retval); goto err_set_vbus; } device_wakeup_enable(hcd->self.controller); } if (pdata->private_init) pdata->private_init(ehci_mv->op_regs, ehci_mv->phy_regs); dev_info(&pdev->dev, "successful find EHCI device with regs 0x%p irq %d" " working in %s mode\n", hcd->regs, hcd->irq, ehci_mv->mode == MV_USB_MODE_OTG ? "OTG" : "Host"); return 0; err_set_vbus: if (pdata->set_vbus) pdata->set_vbus(0); err_disable_clk: mv_ehci_disable(ehci_mv); err_put_hcd: usb_put_hcd(hcd); return retval; } static int mv_ehci_remove(struct platform_device *pdev) { struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev); struct usb_hcd *hcd = ehci_mv->hcd; if (hcd->rh_registered) usb_remove_hcd(hcd); if (!IS_ERR_OR_NULL(ehci_mv->otg)) otg_set_host(ehci_mv->otg->otg, NULL); if (ehci_mv->mode == MV_USB_MODE_HOST) { if (ehci_mv->pdata->set_vbus) ehci_mv->pdata->set_vbus(0); mv_ehci_disable(ehci_mv); } usb_put_hcd(hcd); return 0; } MODULE_ALIAS("mv-ehci"); static const struct platform_device_id ehci_id_table[] = { {"pxa-u2oehci", PXA_U2OEHCI}, {"pxa-sph", PXA_SPH}, {"mmp3-hsic", MMP3_HSIC}, {"mmp3-fsic", MMP3_FSIC}, {}, }; static void mv_ehci_shutdown(struct platform_device *pdev) { struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev); struct usb_hcd *hcd = ehci_mv->hcd; if (!hcd->rh_registered) return; if (hcd->driver->shutdown) hcd->driver->shutdown(hcd); } static struct platform_driver ehci_mv_driver = { .probe = mv_ehci_probe, .remove = mv_ehci_remove, .shutdown = mv_ehci_shutdown, .driver = { .name = "mv-ehci", .bus = &platform_bus_type, }, .id_table = ehci_id_table, }; d the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'include/trace/events/module.h')