USB: ohci SSB bus glue
This adds SSB bus glue for the USB OHCI HCD. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Michael Buesch
Greg Kroah-Hartman
parent
b24896c6b7
commit
c604e85148
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@ -154,6 +154,19 @@ config USB_OHCI_HCD_PCI
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Enables support for PCI-bus plug-in USB controller cards.
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If unsure, say Y.
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config USB_OHCI_HCD_SSB
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bool "OHCI support for Broadcom SSB OHCI core"
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depends on USB_OHCI_HCD && SSB && EXPERIMENTAL
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default n
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---help---
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Support for the Sonics Silicon Backplane (SSB) attached
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Broadcom USB OHCI core.
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This device is present in some embedded devices with
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Broadcom based SSB bus.
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If unsure, say N.
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config USB_OHCI_BIG_ENDIAN_DESC
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bool
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depends on USB_OHCI_HCD
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@ -1033,11 +1033,17 @@ MODULE_LICENSE ("GPL");
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#define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver
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#endif
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#ifdef CONFIG_USB_OHCI_HCD_SSB
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#include "ohci-ssb.c"
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#define SSB_OHCI_DRIVER ssb_ohci_driver
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#endif
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#if !defined(PCI_DRIVER) && \
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!defined(PLATFORM_DRIVER) && \
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!defined(OF_PLATFORM_DRIVER) && \
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!defined(SA1111_DRIVER) && \
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!defined(PS3_SYSTEM_BUS_DRIVER)
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!defined(PS3_SYSTEM_BUS_DRIVER) && \
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!defined(SSB_OHCI_DRIVER)
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#error "missing bus glue for ohci-hcd"
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#endif
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@ -1082,10 +1088,20 @@ static int __init ohci_hcd_mod_init(void)
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goto error_pci;
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#endif
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#ifdef SSB_OHCI_DRIVER
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retval = ssb_driver_register(&SSB_OHCI_DRIVER);
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if (retval)
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goto error_ssb;
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#endif
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return retval;
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/* Error path */
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#ifdef SSB_OHCI_DRIVER
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error_ssb:
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#endif
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#ifdef PCI_DRIVER
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pci_unregister_driver(&PCI_DRIVER);
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error_pci:
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#endif
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#ifdef SA1111_DRIVER
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@ -1110,6 +1126,9 @@ module_init(ohci_hcd_mod_init);
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static void __exit ohci_hcd_mod_exit(void)
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{
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#ifdef SSB_OHCI_DRIVER
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ssb_driver_unregister(&SSB_OHCI_DRIVER);
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#endif
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#ifdef PCI_DRIVER
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pci_unregister_driver(&PCI_DRIVER);
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#endif
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@ -0,0 +1,247 @@
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/*
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* Sonics Silicon Backplane
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* Broadcom USB-core OHCI driver
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*
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* Copyright 2007 Michael Buesch <mb@bu3sch.de>
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*
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* Derived from the OHCI-PCI driver
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* Copyright 1999 Roman Weissgaerber
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* Copyright 2000-2002 David Brownell
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* Copyright 1999 Linus Torvalds
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* Copyright 1999 Gregory P. Smith
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*
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* Derived from the USBcore related parts of Broadcom-SB
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* Copyright 2005 Broadcom Corporation
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*
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* Licensed under the GNU/GPL. See COPYING for details.
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*/
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#include <linux/ssb/ssb.h>
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#define SSB_OHCI_TMSLOW_HOSTMODE (1 << 29)
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struct ssb_ohci_device {
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struct ohci_hcd ohci; /* _must_ be at the beginning. */
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u32 enable_flags;
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};
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static inline
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struct ssb_ohci_device *hcd_to_ssb_ohci(struct usb_hcd *hcd)
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{
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return (struct ssb_ohci_device *)(hcd->hcd_priv);
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}
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static int ssb_ohci_reset(struct usb_hcd *hcd)
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{
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struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
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struct ohci_hcd *ohci = &ohcidev->ohci;
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int err;
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ohci_hcd_init(ohci);
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err = ohci_init(ohci);
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return err;
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}
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static int ssb_ohci_start(struct usb_hcd *hcd)
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{
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struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
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struct ohci_hcd *ohci = &ohcidev->ohci;
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int err;
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err = ohci_run(ohci);
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if (err < 0) {
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ohci_err(ohci, "can't start\n");
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ohci_stop(hcd);
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}
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return err;
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}
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#ifdef CONFIG_PM
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static int ssb_ohci_hcd_suspend(struct usb_hcd *hcd, pm_message_t message)
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{
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struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
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struct ohci_hcd *ohci = &ohcidev->ohci;
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unsigned long flags;
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spin_lock_irqsave(&ohci->lock, flags);
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ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
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ohci_readl(ohci, &ohci->regs->intrdisable); /* commit write */
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/* make sure snapshot being resumed re-enumerates everything */
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if (message.event == PM_EVENT_PRETHAW)
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ohci_usb_reset(ohci);
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clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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spin_unlock_irqrestore(&ohci->lock, flags);
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return 0;
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}
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static int ssb_ohci_hcd_resume(struct usb_hcd *hcd)
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{
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set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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usb_hcd_resume_root_hub(hcd);
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return 0;
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}
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#endif /* CONFIG_PM */
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static const struct hc_driver ssb_ohci_hc_driver = {
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.description = "ssb-usb-ohci",
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.product_desc = "SSB OHCI Controller",
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.hcd_priv_size = sizeof(struct ssb_ohci_device),
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.irq = ohci_irq,
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.flags = HCD_MEMORY | HCD_USB11,
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.reset = ssb_ohci_reset,
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.start = ssb_ohci_start,
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.stop = ohci_stop,
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.shutdown = ohci_shutdown,
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#ifdef CONFIG_PM
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.suspend = ssb_ohci_hcd_suspend,
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.resume = ssb_ohci_hcd_resume,
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#endif
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.urb_enqueue = ohci_urb_enqueue,
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.urb_dequeue = ohci_urb_dequeue,
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.endpoint_disable = ohci_endpoint_disable,
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.get_frame_number = ohci_get_frame,
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.hub_status_data = ohci_hub_status_data,
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.hub_control = ohci_hub_control,
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.hub_irq_enable = ohci_rhsc_enable,
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.bus_suspend = ohci_bus_suspend,
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.bus_resume = ohci_bus_resume,
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.start_port_reset = ohci_start_port_reset,
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};
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static void ssb_ohci_detach(struct ssb_device *dev)
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{
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struct usb_hcd *hcd = ssb_get_drvdata(dev);
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usb_remove_hcd(hcd);
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iounmap(hcd->regs);
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usb_put_hcd(hcd);
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ssb_device_disable(dev, 0);
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}
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static int ssb_ohci_attach(struct ssb_device *dev)
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{
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struct ssb_ohci_device *ohcidev;
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struct usb_hcd *hcd;
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int err = -ENOMEM;
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u32 tmp, flags = 0;
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if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)
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flags |= SSB_OHCI_TMSLOW_HOSTMODE;
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ssb_device_enable(dev, flags);
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hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev,
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dev->dev->bus_id);
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if (!hcd)
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goto err_dev_disable;
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ohcidev = hcd_to_ssb_ohci(hcd);
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ohcidev->enable_flags = flags;
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tmp = ssb_read32(dev, SSB_ADMATCH0);
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hcd->rsrc_start = ssb_admatch_base(tmp);
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hcd->rsrc_len = ssb_admatch_size(tmp);
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hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
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if (!hcd->regs)
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goto err_put_hcd;
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err = usb_add_hcd(hcd, dev->irq, IRQF_SHARED);
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if (err)
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goto err_iounmap;
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ssb_set_drvdata(dev, hcd);
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return err;
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err_iounmap:
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iounmap(hcd->regs);
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err_put_hcd:
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usb_put_hcd(hcd);
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err_dev_disable:
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ssb_device_disable(dev, flags);
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return err;
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}
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static int ssb_ohci_probe(struct ssb_device *dev,
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const struct ssb_device_id *id)
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{
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int err;
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u16 chipid_top;
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/* USBcores are only connected on embedded devices. */
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chipid_top = (dev->bus->chip_id & 0xFF00);
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if (chipid_top != 0x4700 && chipid_top != 0x5300)
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return -ENODEV;
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/* TODO: Probably need checks here; is the core connected? */
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if (usb_disabled())
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return -ENODEV;
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/* We currently always attach SSB_DEV_USB11_HOSTDEV
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* as HOST OHCI. If we want to attach it as Client device,
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* we must branch here and call into the (yet to
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* be written) Client mode driver. Same for remove(). */
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err = ssb_ohci_attach(dev);
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return err;
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}
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static void ssb_ohci_remove(struct ssb_device *dev)
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{
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ssb_ohci_detach(dev);
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}
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#ifdef CONFIG_PM
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static int ssb_ohci_suspend(struct ssb_device *dev, pm_message_t state)
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{
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ssb_device_disable(dev, 0);
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return 0;
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}
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static int ssb_ohci_resume(struct ssb_device *dev)
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{
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struct usb_hcd *hcd = ssb_get_drvdata(dev);
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struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
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ssb_device_enable(dev, ohcidev->enable_flags);
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return 0;
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}
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#else /* !CONFIG_PM */
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#define ssb_ohci_suspend NULL
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#define ssb_ohci_resume NULL
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#endif /* CONFIG_PM */
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static const struct ssb_device_id ssb_ohci_table[] = {
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SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV),
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SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV),
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SSB_DEVTABLE_END
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};
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MODULE_DEVICE_TABLE(ssb, ssb_ohci_table);
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static struct ssb_driver ssb_ohci_driver = {
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.name = KBUILD_MODNAME,
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.id_table = ssb_ohci_table,
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.probe = ssb_ohci_probe,
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.remove = ssb_ohci_remove,
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.suspend = ssb_ohci_suspend,
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.resume = ssb_ohci_resume,
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};
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