USB: OHCI: make ohci-ep93xx a separate driver

Separate the OHCI EP93XX 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: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 74ca887..31a431a 100644 (file)
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -397,6 +397,14 @@ config USB_OHCI_HCD_LPC32XX
           Enables support for the on-chip OHCI controller on
           NXP chips.
 
+config USB_OHCI_HCD_EP93XX
+       tristate "Support for EP93XX on-chip OHCI USB controller"
+       depends on USB_OHCI_HCD && ARCH_EP93XX
+       default y
+       ---help---
+         Enables support for the on-chip OHCI controller on
+         EP93XX chips.
+
 config USB_OHCI_HCD_AT91
         tristate "Support for Atmel on-chip OHCI USB controller"
         depends on USB_OHCI_HCD && ARCH_AT91

diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index db9416f..68b148c 100644 (file)
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -54,6 +54,7 @@ obj-$(CONFIG_USB_OHCI_HCD_SPEAR)      += ohci-spear.o
 obj-$(CONFIG_USB_OHCI_HCD_AT91)        += ohci-at91.o
 obj-$(CONFIG_USB_OHCI_HCD_S3C2410)     += ohci-s3c2410.o
 obj-$(CONFIG_USB_OHCI_HCD_LPC32XX)     += ohci-nxp.o
+obj-$(CONFIG_USB_OHCI_HCD_EP93XX)      += ohci-ep93xx.o
 
 obj-$(CONFIG_USB_UHCI_HCD)     += uhci-hcd.o
 obj-$(CONFIG_USB_FHCI_HCD)     += fhci.o

diff --git a/drivers/usb/host/ohci-ep93xx.c b/drivers/usb/host/ohci-ep93xx.c
index 84a20d5..492f681 100644 (file)
--- a/drivers/usb/host/ohci-ep93xx.c
+++ b/drivers/usb/host/ohci-ep93xx.c
@@ -25,50 +25,23 @@
 
 #include <linux/clk.h>
 #include <linux/device.h>
-#include <linux/signal.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/signal.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
 
-static struct clk *usb_host_clock;
+#include "ohci.h"
 
-static int ohci_ep93xx_start(struct usb_hcd *hcd)
-{
-       struct ohci_hcd *ohci = hcd_to_ohci(hcd);
-       int ret;
+#define DRIVER_DESC "OHCI EP93xx driver"
 
-       if ((ret = ohci_init(ohci)) < 0)
-               return ret;
+static const char hcd_name[] = "ohci-ep93xx";
 
-       if ((ret = ohci_run(ohci)) < 0) {
-               dev_err(hcd->self.controller, "can't start %s\n",
-                       hcd->self.bus_name);
-               ohci_stop(hcd);
-               return ret;
-       }
+static struct hc_driver __read_mostly ohci_ep93xx_hc_driver;
 
-       return 0;
-}
-
-static struct hc_driver ohci_ep93xx_hc_driver = {
-       .description            = hcd_name,
-       .product_desc           = "EP93xx OHCI",
-       .hcd_priv_size          = sizeof(struct ohci_hcd),
-       .irq                    = ohci_irq,
-       .flags                  = HCD_USB11 | HCD_MEMORY,
-       .start                  = ohci_ep93xx_start,
-       .stop                   = ohci_stop,
-       .shutdown               = ohci_shutdown,
-       .urb_enqueue            = ohci_urb_enqueue,
-       .urb_dequeue            = ohci_urb_dequeue,
-       .endpoint_disable       = ohci_endpoint_disable,
-       .get_frame_number       = ohci_get_frame,
-       .hub_status_data        = ohci_hub_status_data,
-       .hub_control            = ohci_hub_control,
-#ifdef CONFIG_PM
-       .bus_suspend            = ohci_bus_suspend,
-       .bus_resume             = ohci_bus_resume,
-#endif
-       .start_port_reset       = ohci_start_port_reset,
-};
+static struct clk *usb_host_clock;
 
 static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
 {
@@ -109,8 +82,6 @@ static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
 
        clk_enable(usb_host_clock);
 
-       ohci_hcd_init(hcd_to_ohci(hcd));
-
        ret = usb_add_hcd(hcd, irq, 0);
        if (ret)
                goto err_clk_disable;
@@ -166,7 +137,6 @@ static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev)
 }
 #endif
 
-
 static struct platform_driver ohci_hcd_ep93xx_driver = {
        .probe          = ohci_hcd_ep93xx_drv_probe,
        .remove         = ohci_hcd_ep93xx_drv_remove,
@@ -181,4 +151,24 @@ static struct platform_driver ohci_hcd_ep93xx_driver = {
        },
 };
 
+static int __init ohci_ep93xx_init(void)
+{
+       if (usb_disabled())
+               return -ENODEV;
+
+       pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+       ohci_init_driver(&ohci_ep93xx_hc_driver, NULL);
+       return platform_driver_register(&ohci_hcd_ep93xx_driver);
+}
+module_init(ohci_ep93xx_init);
+
+static void __exit ohci_ep93xx_cleanup(void)
+{
+       platform_driver_unregister(&ohci_hcd_ep93xx_driver);
+}
+module_exit(ohci_ep93xx_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:ep93xx-ohci");

diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index c515192..2ee3171 100644 (file)
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1182,11 +1182,6 @@ MODULE_LICENSE ("GPL");
 #define PLATFORM_DRIVER                ohci_hcd_pxa27x_driver
 #endif
 
-#ifdef CONFIG_ARCH_EP93XX
-#include "ohci-ep93xx.c"
-#define EP93XX_PLATFORM_DRIVER ohci_hcd_ep93xx_driver
-#endif
-
 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
 #include "ohci-da8xx.c"
 #define DAVINCI_PLATFORM_DRIVER        ohci_hcd_da8xx_driver
@@ -1283,12 +1278,6 @@ static int __init ohci_hcd_mod_init(void)
                goto error_tmio;
 #endif
 
-#ifdef EP93XX_PLATFORM_DRIVER
-       retval = platform_driver_register(&EP93XX_PLATFORM_DRIVER);
-       if (retval < 0)
-               goto error_ep93xx;
-#endif
-
 #ifdef DAVINCI_PLATFORM_DRIVER
        retval = platform_driver_register(&DAVINCI_PLATFORM_DRIVER);
        if (retval < 0)
@@ -1302,10 +1291,6 @@ static int __init ohci_hcd_mod_init(void)
        platform_driver_unregister(&DAVINCI_PLATFORM_DRIVER);
  error_davinci:
 #endif
-#ifdef EP93XX_PLATFORM_DRIVER
-       platform_driver_unregister(&EP93XX_PLATFORM_DRIVER);
- error_ep93xx:
-#endif
 #ifdef TMIO_OHCI_DRIVER
        platform_driver_unregister(&TMIO_OHCI_DRIVER);
  error_tmio:
@@ -1346,9 +1331,6 @@ static void __exit ohci_hcd_mod_exit(void)
 #ifdef DAVINCI_PLATFORM_DRIVER
        platform_driver_unregister(&DAVINCI_PLATFORM_DRIVER);
 #endif
-#ifdef EP93XX_PLATFORM_DRIVER
-       platform_driver_unregister(&EP93XX_PLATFORM_DRIVER);
-#endif
 #ifdef TMIO_OHCI_DRIVER
        platform_driver_unregister(&TMIO_OHCI_DRIVER);
 #endif