USB: OHCI: make ohci-omap3 a separate driver
Separate the TI OHCI OMAP3 host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM. Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org> Signed-off-by: Deepak Saxena <dsaxena@linaro.org> Acked-by: Alan Stern <stern@rowland.harvard.edu> Cc: Anand Gadiyar <gadiyar@ti.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -374,7 +374,7 @@ config USB_OHCI_HCD_OMAP1
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Enables support for the OHCI controller on OMAP1/2 chips.
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config USB_OHCI_HCD_OMAP3
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bool "OHCI support for OMAP3 and later chips"
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tristate "OHCI support for OMAP3 and later chips"
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depends on (ARCH_OMAP3 || ARCH_OMAP4)
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default y
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---help---
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@ -49,6 +49,7 @@ obj-$(CONFIG_USB_OHCI_HCD_PCI) += ohci-pci.o
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obj-$(CONFIG_USB_OHCI_HCD_PLATFORM) += ohci-platform.o
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obj-$(CONFIG_USB_OHCI_EXYNOS) += ohci-exynos.o
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obj-$(CONFIG_USB_OHCI_HCD_OMAP1) += ohci-omap.o
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obj-$(CONFIG_USB_OHCI_HCD_OMAP3) += ohci-omap3.o
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obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
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obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
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@ -1182,11 +1182,6 @@ MODULE_LICENSE ("GPL");
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#define S3C2410_PLATFORM_DRIVER ohci_hcd_s3c2410_driver
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#endif
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#ifdef CONFIG_USB_OHCI_HCD_OMAP3
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#include "ohci-omap3.c"
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#define OMAP3_PLATFORM_DRIVER ohci_hcd_omap3_driver
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#endif
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#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
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#include "ohci-pxa27x.c"
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#define PLATFORM_DRIVER ohci_hcd_pxa27x_driver
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@ -1284,12 +1279,6 @@ static int __init ohci_hcd_mod_init(void)
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goto error_platform;
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#endif
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#ifdef OMAP3_PLATFORM_DRIVER
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retval = platform_driver_register(&OMAP3_PLATFORM_DRIVER);
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if (retval < 0)
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goto error_omap3_platform;
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#endif
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#ifdef OF_PLATFORM_DRIVER
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retval = platform_driver_register(&OF_PLATFORM_DRIVER);
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if (retval < 0)
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@ -1393,10 +1382,6 @@ static int __init ohci_hcd_mod_init(void)
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platform_driver_unregister(&OF_PLATFORM_DRIVER);
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error_of_platform:
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#endif
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#ifdef OMAP3_PLATFORM_DRIVER
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platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
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error_omap3_platform:
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#endif
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#ifdef PLATFORM_DRIVER
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platform_driver_unregister(&PLATFORM_DRIVER);
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error_platform:
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@ -1448,9 +1433,6 @@ static void __exit ohci_hcd_mod_exit(void)
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#ifdef OF_PLATFORM_DRIVER
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platform_driver_unregister(&OF_PLATFORM_DRIVER);
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#endif
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#ifdef OMAP3_PLATFORM_DRIVER
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platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
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#endif
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#ifdef PLATFORM_DRIVER
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platform_driver_unregister(&PLATFORM_DRIVER);
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#endif
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@ -29,90 +29,22 @@
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* - add kernel-doc
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*/
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#include <linux/dma-mapping.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/usb/otg.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/of.h>
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#include <linux/dma-mapping.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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/*-------------------------------------------------------------------------*/
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#include "ohci.h"
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static int ohci_omap3_init(struct usb_hcd *hcd)
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{
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dev_dbg(hcd->self.controller, "starting OHCI controller\n");
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#define DRIVER_DESC "OHCI OMAP3 driver"
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return ohci_init(hcd_to_ohci(hcd));
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}
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/*-------------------------------------------------------------------------*/
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static int ohci_omap3_start(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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int ret;
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/*
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* RemoteWakeupConnected has to be set explicitly before
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* calling ohci_run. The reset value of RWC is 0.
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*/
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ohci->hc_control = OHCI_CTRL_RWC;
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writel(OHCI_CTRL_RWC, &ohci->regs->control);
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ret = ohci_run(ohci);
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if (ret < 0) {
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dev_err(hcd->self.controller, "can't start\n");
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ohci_stop(hcd);
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}
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return ret;
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}
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/*-------------------------------------------------------------------------*/
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static const struct hc_driver ohci_omap3_hc_driver = {
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.description = hcd_name,
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.product_desc = "OMAP3 OHCI Host Controller",
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.hcd_priv_size = sizeof(struct ohci_hcd),
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/*
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* generic hardware linkage
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*/
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.irq = ohci_irq,
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.flags = HCD_USB11 | HCD_MEMORY,
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/*
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* basic lifecycle operations
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*/
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.reset = ohci_omap3_init,
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.start = ohci_omap3_start,
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.stop = ohci_stop,
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.shutdown = ohci_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 = 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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/*
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* scheduling support
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*/
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.get_frame_number = ohci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ohci_hub_status_data,
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.hub_control = ohci_hub_control,
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#ifdef CONFIG_PM
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.bus_suspend = ohci_bus_suspend,
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.bus_resume = ohci_bus_resume,
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#endif
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.start_port_reset = ohci_start_port_reset,
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};
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/*-------------------------------------------------------------------------*/
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static const char hcd_name[] = "ohci-omap3";
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static struct hc_driver __read_mostly ohci_omap3_hc_driver;
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/*
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* configure so an HC device and id are always provided
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@ -129,6 +61,7 @@ static const struct hc_driver ohci_omap3_hc_driver = {
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static int ohci_hcd_omap3_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct ohci_hcd *ohci;
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struct usb_hcd *hcd = NULL;
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void __iomem *regs = NULL;
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struct resource *res;
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@ -185,7 +118,12 @@ static int ohci_hcd_omap3_probe(struct platform_device *pdev)
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pm_runtime_enable(dev);
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pm_runtime_get_sync(dev);
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ohci_hcd_init(hcd_to_ohci(hcd));
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ohci = hcd_to_ohci(hcd);
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/*
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* RemoteWakeupConnected has to be set explicitly before
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* calling ohci_run. The reset value of RWC is 0.
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*/
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ohci->hc_control = OHCI_CTRL_RWC;
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ret = usb_add_hcd(hcd, irq, 0);
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if (ret) {
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@ -248,5 +186,25 @@ static struct platform_driver ohci_hcd_omap3_driver = {
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},
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};
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static int __init ohci_omap3_init(void)
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{
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if (usb_disabled())
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return -ENODEV;
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pr_info("%s: " DRIVER_DESC "\n", hcd_name);
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ohci_init_driver(&ohci_omap3_hc_driver, NULL);
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return platform_driver_register(&ohci_hcd_omap3_driver);
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}
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module_init(ohci_omap3_init);
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static void __exit ohci_omap3_cleanup(void)
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{
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platform_driver_unregister(&ohci_hcd_omap3_driver);
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}
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module_exit(ohci_omap3_cleanup);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_ALIAS("platform:ohci-omap3");
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MODULE_AUTHOR("Anand Gadiyar <gadiyar@ti.com>");
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MODULE_LICENSE("GPL");
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