USB: EHCI: make ehci-mv a separate driver

This is done do that it could be enabled alongside other platform EHCI
glue drivers on multiplatform kernels.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

4 files changed, 44 insertions, 62 deletions

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 1a4ea98cac2a..16758b12a5e9 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -276,7 +276,7 @@ config USB_EHCI_EXYNOS
         Enable support for the Samsung Exynos SOC's on-chip EHCI controller.
 
 config USB_EHCI_MV
-        bool "EHCI support for Marvell PXA/MMP USB controller"
+        tristate "EHCI support for Marvell PXA/MMP USB controller"
         depends on (ARCH_PXA || ARCH_MMP)
         select USB_EHCI_ROOT_HUB_TT
         ---help---
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index e6235269c151..84514f71ae44 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -87,6 +87,7 @@ obj-$(CONFIG_USB_IMX21_HCD)	+= imx21-hcd.o
 obj-$(CONFIG_USB_FSL_USB2)      += fsl-mph-dr-of.o
 obj-$(CONFIG_USB_EHCI_FSL)      += fsl-mph-dr-of.o
 obj-$(CONFIG_USB_EHCI_FSL)      += ehci-fsl.o
+obj-$(CONFIG_USB_EHCI_MV)       += ehci-mv.o
 obj-$(CONFIG_USB_HCD_BCMA)      += bcma-hcd.o
 obj-$(CONFIG_USB_HCD_SSB)       += ssb-hcd.o
 obj-$(CONFIG_USB_FOTG210_HCD)   += fotg210-hcd.o
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 8608ac513fb7..e8d7667828eb 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1286,11 +1286,6 @@ MODULE_LICENSE ("GPL");
 #define PLATFORM_DRIVER         ehci_grlib_driver
 #endif
 
-#ifdef CONFIG_USB_EHCI_MV
-#include "ehci-mv.c"
-#define        PLATFORM_DRIVER         ehci_mv_driver
-#endif
-
 static int __init ehci_hcd_init(void)
 {
         int retval = 0;
diff --git a/drivers/usb/host/ehci-mv.c b/drivers/usb/host/ehci-mv.c
index de764459e05a..77a4ab1dcd07 100644
--- a/drivers/usb/host/ehci-mv.c
+++ b/drivers/usb/host/ehci-mv.c
@@ -12,12 +12,17 @@
 #include <linux/err.h>
 #include <linux/usb/otg.h>
 #include <linux/platform_data/mv_usb.h>
+#include <linux/io.h>
+
+#include <linux/usb/hcd.h>
+
+#include "ehci.h"
 
 #define CAPLENGTH_MASK         (0xff)
 
-struct ehci_hcd_mv {
-        struct usb_hcd *hcd;
+#define hcd_to_ehci_hcd_mv(h) ((struct ehci_hcd_mv *)hcd_to_ehci(h)->priv)
 
+struct ehci_hcd_mv {
         /* Which mode does this ehci running OTG/Host ? */
         int mode;
 
@@ -66,7 +71,7 @@ static void mv_ehci_disable(struct ehci_hcd_mv *ehci_mv)
 static int mv_ehci_reset(struct usb_hcd *hcd)
 {
         struct device *dev = hcd->self.controller;
-        struct ehci_hcd_mv *ehci_mv = dev_get_drvdata(dev);
+        struct ehci_hcd_mv *ehci_mv = hcd_to_ehci_hcd_mv(hcd);
         int retval;
 
         if (ehci_mv == NULL) {
@@ -83,46 +88,11 @@ static int mv_ehci_reset(struct usb_hcd *hcd)
         return retval;
 }
 
-static const struct hc_driver mv_ehci_hc_driver = {
-        .description = hcd_name,
-        .product_desc = "Marvell EHCI",
-        .hcd_priv_size = sizeof(struct ehci_hcd),
-
-        /*
-         * generic hardware linkage
-         */
-        .irq = ehci_irq,
-        .flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
-
-        /*
-         * basic lifecycle operations
-         */
-        .reset = mv_ehci_reset,
-        .start = ehci_run,
-        .stop = ehci_stop,
-        .shutdown = ehci_shutdown,
-
-        /*
-         * managing i/o requests and associated device resources
-         */
-        .urb_enqueue = ehci_urb_enqueue,
-        .urb_dequeue = ehci_urb_dequeue,
-        .endpoint_disable = ehci_endpoint_disable,
-        .endpoint_reset = ehci_endpoint_reset,
-        .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
-
-        /*
-         * scheduling support
-         */
-        .get_frame_number = ehci_get_frame,
-
-        /*
-         * root hub support
-         */
-        .hub_status_data = ehci_hub_status_data,
-        .hub_control = ehci_hub_control,
-        .bus_suspend = ehci_bus_suspend,
-        .bus_resume = ehci_bus_resume,
+static struct hc_driver __read_mostly ehci_platform_hc_driver;
+
+static const struct ehci_driver_overrides platform_overrides __initconst = {
+        .reset =                mv_ehci_reset,
+        .extra_priv_size =      sizeof(struct ehci_hcd_mv),
 };
 
 static int mv_ehci_probe(struct platform_device *pdev)
@@ -143,19 +113,13 @@ static int mv_ehci_probe(struct platform_device *pdev)
         if (usb_disabled())
                 return -ENODEV;
 
-        hcd = usb_create_hcd(&mv_ehci_hc_driver, &pdev->dev, "mv ehci");
+        hcd = usb_create_hcd(&ehci_platform_hc_driver, &pdev->dev, "mv ehci");
         if (!hcd)
                 return -ENOMEM;
 
-        ehci_mv = devm_kzalloc(&pdev->dev, sizeof(*ehci_mv), GFP_KERNEL);
-        if (ehci_mv == NULL) {
-                retval = -ENOMEM;
-                goto err_put_hcd;
-        }
-
-        platform_set_drvdata(pdev, ehci_mv);
+        platform_set_drvdata(pdev, hcd);
+        ehci_mv = hcd_to_ehci_hcd_mv(hcd);
         ehci_mv->pdata = pdata;
-        ehci_mv->hcd = hcd;
 
         ehci_mv->clk = devm_clk_get(&pdev->dev, NULL);
         if (IS_ERR(ehci_mv->clk)) {
@@ -262,8 +226,8 @@ err_put_hcd:
 
 static int mv_ehci_remove(struct platform_device *pdev)
 {
-        struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
-        struct usb_hcd *hcd = ehci_mv->hcd;
+        struct usb_hcd *hcd = platform_get_drvdata(pdev);
+        struct ehci_hcd_mv *ehci_mv = hcd_to_ehci_hcd_mv(hcd);
 
         if (hcd->rh_registered)
                 usb_remove_hcd(hcd);
@@ -295,8 +259,8 @@ static const struct platform_device_id ehci_id_table[] = {
 
 static void mv_ehci_shutdown(struct platform_device *pdev)
 {
-        struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
-        struct usb_hcd *hcd = ehci_mv->hcd;
+        struct usb_hcd *hcd = platform_get_drvdata(pdev);
+        struct ehci_hcd_mv *ehci_mv = hcd_to_ehci_hcd_mv(hcd);
 
         if (!hcd->rh_registered)
                 return;
@@ -315,3 +279,25 @@ static struct platform_driver ehci_mv_driver = {
                    },
         .id_table = ehci_id_table,
 };
+
+static int __init ehci_platform_init(void)
+{
+        if (usb_disabled())
+                return -ENODEV;
+
+        ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
+        return platform_driver_register(&ehci_mv_driver);
+}
+module_init(ehci_platform_init);
+
+static void __exit ehci_platform_cleanup(void)
+{
+        platform_driver_unregister(&ehci_mv_driver);
+}
+module_exit(ehci_platform_cleanup);
+
+MODULE_DESCRIPTION("Marvell EHCI driver");
+MODULE_AUTHOR("Chao Xie <chao.xie@marvell.com>");
+MODULE_AUTHOR("Neil Zhang <zhangwm@marvell.com>");
+MODULE_ALIAS("mv-ehci");
+MODULE_LICENSE("GPL");