diff options
Diffstat (limited to 'drivers/usb/host/ehci-fsl.c')
| -rw-r--r-- | drivers/usb/host/ehci-fsl.c | 90 |
1 files changed, 83 insertions, 7 deletions
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index 593a7e76cffa..0e26aa13f158 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -1,5 +1,6 @@ /* - * Copyright (c) 2005 MontaVista Software + * Copyright 2005-2009 MontaVista Software, Inc. + * Copyright 2008 Freescale Semiconductor, Inc. * * 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 @@ -17,17 +18,20 @@ * * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided * by Hunter Wu. + * Power Management support by Dave Liu <daveliu@freescale.com>, + * Jerry Huang <Chang-Ming.Huang@freescale.com> and + * Anton Vorontsov <avorontsov@ru.mvista.com>. */ +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/delay.h> +#include <linux/pm.h> #include <linux/platform_device.h> #include <linux/fsl_devices.h> #include "ehci-fsl.h" -/* FIXME: Power Management is un-ported so temporarily disable it */ -#undef CONFIG_PM - - /* configure so an HC device and id are always provided */ /* always called with process context; sleeping is OK */ @@ -285,10 +289,81 @@ static int ehci_fsl_setup(struct usb_hcd *hcd) return retval; } +struct ehci_fsl { + struct ehci_hcd ehci; + +#ifdef CONFIG_PM + /* Saved USB PHY settings, need to restore after deep sleep. */ + u32 usb_ctrl; +#endif +}; + +#ifdef CONFIG_PM + +static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + + return container_of(ehci, struct ehci_fsl, ehci); +} + +static int ehci_fsl_drv_suspend(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd); + void __iomem *non_ehci = hcd->regs; + + if (!fsl_deep_sleep()) + return 0; + + ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL); + return 0; +} + +static int ehci_fsl_drv_resume(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd); + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + void __iomem *non_ehci = hcd->regs; + + if (!fsl_deep_sleep()) + return 0; + + usb_root_hub_lost_power(hcd->self.root_hub); + + /* Restore USB PHY settings and enable the controller. */ + out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl); + + ehci_reset(ehci); + ehci_fsl_reinit(ehci); + + return 0; +} + +static int ehci_fsl_drv_restore(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + + usb_root_hub_lost_power(hcd->self.root_hub); + return 0; +} + +static struct dev_pm_ops ehci_fsl_pm_ops = { + .suspend = ehci_fsl_drv_suspend, + .resume = ehci_fsl_drv_resume, + .restore = ehci_fsl_drv_restore, +}; + +#define EHCI_FSL_PM_OPS (&ehci_fsl_pm_ops) +#else +#define EHCI_FSL_PM_OPS NULL +#endif /* CONFIG_PM */ + static const struct hc_driver ehci_fsl_hc_driver = { .description = hcd_name, .product_desc = "Freescale On-Chip EHCI Host Controller", - .hcd_priv_size = sizeof(struct ehci_hcd), + .hcd_priv_size = sizeof(struct ehci_fsl), /* * generic hardware linkage @@ -355,6 +430,7 @@ static struct platform_driver ehci_fsl_driver = { .remove = ehci_fsl_drv_remove, .shutdown = usb_hcd_platform_shutdown, .driver = { - .name = "fsl-ehci", + .name = "fsl-ehci", + .pm = EHCI_FSL_PM_OPS, }, }; |