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xhci: Allow xHCI drivers to be built as separate modules

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Instead of building all of the xHCI code into a single module, separate
it out into the core (xhci-hcd), PCI (xhci-pci, now selected by the new
config option CONFIG_USB_XHCI_PCI), and platform (xhci-plat) drivers.
Also update the PCI/platform drivers with module descriptions/licenses
and have them register their respective drivers in their initcalls.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrew Bresticker 2014-10-03 11:35:29 +03:00 committed by Greg Kroah-Hartman
parent 436e8c7d45
commit 29e409f0f7
6 changed files with 25 additions and 51 deletions
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5
drivers/usb/host/Kconfig
View File

@ -26,6 +26,11 @@ config USB_XHCI_HCD
if USB_XHCI_HCD
config USB_XHCI_PCI
tristate
depends on PCI
default y
config USB_XHCI_PLATFORM
tristate

12
drivers/usb/host/Makefile
View File

@ -15,22 +15,22 @@ fhci-$(CONFIG_FHCI_DEBUG) += fhci-dbg.o
xhci-hcd-y := xhci.o xhci-mem.o
xhci-hcd-y += xhci-ring.o xhci-hub.o xhci-dbg.o
xhci-hcd-y += xhci-trace.o
xhci-hcd-$(CONFIG_PCI) += xhci-pci.o
ifneq ($(CONFIG_USB_XHCI_PLATFORM), )
xhci-hcd-y += xhci-plat.o
xhci-plat-hcd-y := xhci-plat.o
ifneq ($(CONFIG_USB_XHCI_MVEBU), )
xhci-hcd-y += xhci-mvebu.o
xhci-plat-hcd-y += xhci-mvebu.o
endif
ifneq ($(CONFIG_USB_XHCI_RCAR), )
xhci-hcd-y += xhci-rcar.o
endif
xhci-plat-hcd-y += xhci-rcar.o
endif
obj-$(CONFIG_USB_WHCI_HCD) += whci/
obj-$(CONFIG_PCI) += pci-quirks.o
obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
obj-$(CONFIG_USB_XHCI_PLATFORM) += xhci-plat-hcd.o
obj-$(CONFIG_USB_EHCI_HCD) += ehci-hcd.o
obj-$(CONFIG_USB_EHCI_PCI) += ehci-pci.o
obj-$(CONFIG_USB_EHCI_HCD_PLATFORM) += ehci-platform.o

9
drivers/usb/host/xhci-pci.c
View File

@ -355,7 +355,7 @@ static struct pci_driver xhci_pci_driver = {
#endif
};
int __init xhci_register_pci(void)
static int __init xhci_pci_init(void)
{
xhci_init_driver(&xhci_pci_hc_driver, xhci_pci_setup);
#ifdef CONFIG_PM
@ -364,8 +364,13 @@ int __init xhci_register_pci(void)
#endif
return pci_register_driver(&xhci_pci_driver);
}
module_init(xhci_pci_init);
void xhci_unregister_pci(void)
static void __exit xhci_pci_exit(void)
{
pci_unregister_driver(&xhci_pci_driver);
}
module_exit(xhci_pci_exit);
MODULE_DESCRIPTION("xHCI PCI Host Controller Driver");
MODULE_LICENSE("GPL");

9
drivers/usb/host/xhci-plat.c
View File

@ -247,14 +247,19 @@ static struct platform_driver usb_xhci_driver = {
};
MODULE_ALIAS("platform:xhci-hcd");
int xhci_register_plat(void)
static int __init xhci_plat_init(void)
{
xhci_init_driver(&xhci_plat_hc_driver, xhci_plat_setup);
xhci_plat_hc_driver.start = xhci_plat_start;
return platform_driver_register(&usb_xhci_driver);
}
module_init(xhci_plat_init);
void xhci_unregister_plat(void)
static void __exit xhci_plat_exit(void)
{
platform_driver_unregister(&usb_xhci_driver);
}
module_exit(xhci_plat_exit);
MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
MODULE_LICENSE("GPL");

22
drivers/usb/host/xhci.c
View File

@ -4982,18 +4982,6 @@ MODULE_LICENSE("GPL");
static int __init xhci_hcd_init(void)
{
int retval;
retval = xhci_register_pci();
if (retval < 0) {
pr_debug("Problem registering PCI driver.\n");
return retval;
}
retval = xhci_register_plat();
if (retval < 0) {
pr_debug("Problem registering platform driver.\n");
goto unreg_pci;
}
/*
* Check the compiler generated sizes of structures that must be laid
* out in specific ways for hardware access.
@ -5012,15 +5000,5 @@ static int __init xhci_hcd_init(void)
/* xhci_run_regs has eight fields and embeds 128 xhci_intr_regs */
BUILD_BUG_ON(sizeof(struct xhci_run_regs) != (8+8*128)*32/8);
return 0;
unreg_pci:
xhci_unregister_pci();
return retval;
}
module_init(xhci_hcd_init);
static void __exit xhci_hcd_cleanup(void)
{
xhci_unregister_pci();
xhci_unregister_plat();
}
module_exit(xhci_hcd_cleanup);

19
drivers/usb/host/xhci.h
View File

@ -1731,25 +1731,6 @@ void xhci_urb_free_priv(struct xhci_hcd *xhci, struct urb_priv *urb_priv);
void xhci_free_command(struct xhci_hcd *xhci,
struct xhci_command *command);
#ifdef CONFIG_PCI
/* xHCI PCI glue */
int xhci_register_pci(void);
void xhci_unregister_pci(void);
#else
static inline int xhci_register_pci(void) { return 0; }
static inline void xhci_unregister_pci(void) {}
#endif
#if IS_ENABLED(CONFIG_USB_XHCI_PLATFORM)
int xhci_register_plat(void);
void xhci_unregister_plat(void);
#else
static inline int xhci_register_plat(void)
{ return 0; }
static inline void xhci_unregister_plat(void)
{ }
#endif
/* xHCI host controller glue */
typedef void (*xhci_get_quirks_t)(struct device *, struct xhci_hcd *);
int xhci_handshake(struct xhci_hcd *xhci, void __iomem *ptr,