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![Julia Lawall](/assets/img/avatar_default.png)
The various devm_ functions allocate memory that is released when a driver detaches. This patch uses these functions for data that is allocated in the probe function of a platform device and is only freed in the remove function. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
184 lines
3.9 KiB
C
184 lines
3.9 KiB
C
/*
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* EHCI HCD (Host Controller Driver) for USB.
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*
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* Bus Glue for AMD Alchemy Au1xxx
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*
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* Based on "ohci-au1xxx.c" by Matt Porter <mporter@kernel.crashing.org>
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*
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* Modified for AMD Alchemy Au1200 EHC
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* by K.Boge <karsten.boge@amd.com>
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*
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* This file is licenced under the GPL.
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*/
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#include <linux/platform_device.h>
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#include <asm/mach-au1x00/au1000.h>
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extern int usb_disabled(void);
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static int au1xxx_ehci_setup(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int ret;
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ehci->caps = hcd->regs;
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ret = ehci_setup(hcd);
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ehci->need_io_watchdog = 0;
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return ret;
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}
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static const struct hc_driver ehci_au1xxx_hc_driver = {
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.description = hcd_name,
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.product_desc = "Au1xxx EHCI",
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.hcd_priv_size = sizeof(struct ehci_hcd),
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/*
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* generic hardware linkage
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*/
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.irq = ehci_irq,
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.flags = HCD_MEMORY | HCD_USB2,
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/*
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* basic lifecycle operations
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*
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* FIXME -- ehci_init() doesn't do enough here.
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* See ehci-ppc-soc for a complete implementation.
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*/
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.reset = au1xxx_ehci_setup,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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/*
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* managing i/o requests and associated device resources
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*/
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.urb_enqueue = ehci_urb_enqueue,
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.urb_dequeue = ehci_urb_dequeue,
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.endpoint_disable = ehci_endpoint_disable,
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.endpoint_reset = ehci_endpoint_reset,
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/*
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* scheduling support
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*/
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.get_frame_number = ehci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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static int ehci_hcd_au1xxx_drv_probe(struct platform_device *pdev)
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{
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struct usb_hcd *hcd;
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struct resource *res;
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int ret;
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if (usb_disabled())
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return -ENODEV;
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if (pdev->resource[1].flags != IORESOURCE_IRQ) {
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pr_debug("resource[1] is not IORESOURCE_IRQ");
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return -ENOMEM;
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}
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hcd = usb_create_hcd(&ehci_au1xxx_hc_driver, &pdev->dev, "Au1xxx");
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if (!hcd)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = resource_size(res);
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hcd->regs = devm_request_and_ioremap(&pdev->dev, res);
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if (!hcd->regs) {
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pr_debug("devm_request_and_ioremap failed");
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ret = -ENOMEM;
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goto err1;
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}
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if (alchemy_usb_control(ALCHEMY_USB_EHCI0, 1)) {
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printk(KERN_INFO "%s: controller init failed!\n", pdev->name);
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ret = -ENODEV;
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goto err1;
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}
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ret = usb_add_hcd(hcd, pdev->resource[1].start,
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IRQF_SHARED);
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if (ret == 0) {
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platform_set_drvdata(pdev, hcd);
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return ret;
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}
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alchemy_usb_control(ALCHEMY_USB_EHCI0, 0);
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err1:
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usb_put_hcd(hcd);
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return ret;
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}
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static int ehci_hcd_au1xxx_drv_remove(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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usb_remove_hcd(hcd);
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alchemy_usb_control(ALCHEMY_USB_EHCI0, 0);
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usb_put_hcd(hcd);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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#ifdef CONFIG_PM
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static int ehci_hcd_au1xxx_drv_suspend(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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bool do_wakeup = device_may_wakeup(dev);
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int rc;
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rc = ehci_suspend(hcd, do_wakeup);
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alchemy_usb_control(ALCHEMY_USB_EHCI0, 0);
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return rc;
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}
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static int ehci_hcd_au1xxx_drv_resume(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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alchemy_usb_control(ALCHEMY_USB_EHCI0, 1);
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ehci_resume(hcd, false);
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return 0;
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}
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static const struct dev_pm_ops au1xxx_ehci_pmops = {
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.suspend = ehci_hcd_au1xxx_drv_suspend,
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.resume = ehci_hcd_au1xxx_drv_resume,
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};
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#define AU1XXX_EHCI_PMOPS &au1xxx_ehci_pmops
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#else
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#define AU1XXX_EHCI_PMOPS NULL
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#endif
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static struct platform_driver ehci_hcd_au1xxx_driver = {
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.probe = ehci_hcd_au1xxx_drv_probe,
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.remove = ehci_hcd_au1xxx_drv_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "au1xxx-ehci",
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.owner = THIS_MODULE,
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.pm = AU1XXX_EHCI_PMOPS,
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}
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};
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MODULE_ALIAS("platform:au1xxx-ehci");
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