USB: OHCI: make ohci-nxp a separate driver

Separate the OHCI NXP 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.

Many place function name and struct name started with usb,
current scenario replaced usb with ohci for proper naming.

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>

1 files changed, 48 insertions, 75 deletions

diff --git a/drivers/usb/host/ohci-nxp.c b/drivers/usb/host/ohci-nxp.c
index 7d7d507d54e8..9ab7e24ba65d 100644
--- a/drivers/usb/host/ohci-nxp.c
+++ b/drivers/usb/host/ohci-nxp.c
@@ -19,10 +19,19 @@
  * or implied.
  */
 #include <linux/clk.h>
-#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
 #include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/of.h>
+#include <linux/platform_device.h>
 #include <linux/usb/isp1301.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "ohci.h"
+
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
@@ -57,6 +66,11 @@
 #define start_int_umask(irq)
 #endif
 
+#define DRIVER_DESC "OHCI NXP driver"
+
+static const char hcd_name[] = "ohci-nxp";
+static struct hc_driver __read_mostly ohci_nxp_hc_driver;
+
 static struct i2c_client *isp1301_i2c_client;
 
 extern int usb_disabled(void);
@@ -132,14 +146,14 @@ static inline void isp1301_vbus_off(void)
                 OTG1_VBUS_DRV);
 }
 
-static void nxp_start_hc(void)
+static void ohci_nxp_start_hc(void)
 {
         unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN;
         __raw_writel(tmp, USB_OTG_STAT_CONTROL);
         isp1301_vbus_on();
 }
 
-static void nxp_stop_hc(void)
+static void ohci_nxp_stop_hc(void)
 {
         unsigned long tmp;
         isp1301_vbus_off();
@@ -147,68 +161,9 @@ static void nxp_stop_hc(void)
         __raw_writel(tmp, USB_OTG_STAT_CONTROL);
 }
 
-static int ohci_nxp_start(struct usb_hcd *hcd)
-{
-        struct ohci_hcd *ohci = hcd_to_ohci(hcd);
-        int ret;
-
-        if ((ret = ohci_init(ohci)) < 0)
-                return ret;
-
-        if ((ret = ohci_run(ohci)) < 0) {
-                dev_err(hcd->self.controller, "can't start\n");
-                ohci_stop(hcd);
-                return ret;
-        }
-        return 0;
-}
-
-static const struct hc_driver ohci_nxp_hc_driver = {
-        .description = hcd_name,
-        .product_desc =         "nxp OHCI",
-
-        /*
-         * generic hardware linkage
-         */
-        .irq = ohci_irq,
-        .flags = HCD_USB11 | HCD_MEMORY,
-
-        .hcd_priv_size =        sizeof(struct ohci_hcd),
-        /*
-         * basic lifecycle operations
-         */
-        .start = ohci_nxp_start,
-        .stop = ohci_stop,
-        .shutdown = ohci_shutdown,
-
-        /*
-         * managing i/o requests and associated device resources
-         */
-        .urb_enqueue = ohci_urb_enqueue,
-        .urb_dequeue = ohci_urb_dequeue,
-        .endpoint_disable = ohci_endpoint_disable,
-
-        /*
-         * scheduling support
-         */
-        .get_frame_number = ohci_get_frame,
-
-        /*
-         * root hub support
-         */
-        .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 int usb_hcd_nxp_probe(struct platform_device *pdev)
+static int ohci_hcd_nxp_probe(struct platform_device *pdev)
 {
         struct usb_hcd *hcd = 0;
-        struct ohci_hcd *ohci;
         const struct hc_driver *driver = &ohci_nxp_hc_driver;
         struct resource *res;
         int ret = 0, irq;
@@ -313,17 +268,15 @@ static int usb_hcd_nxp_probe(struct platform_device *pdev)
                 goto fail_resource;
         }
 
-        nxp_start_hc();
+        ohci_nxp_start_hc();
         platform_set_drvdata(pdev, hcd);
-        ohci = hcd_to_ohci(hcd);
-        ohci_hcd_init(ohci);
 
         dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
         ret = usb_add_hcd(hcd, irq, 0);
         if (ret == 0)
                 return ret;
 
-        nxp_stop_hc();
+        ohci_nxp_stop_hc();
 fail_resource:
         usb_put_hcd(hcd);
 fail_hcd:
@@ -345,12 +298,12 @@ fail_disable:
         return ret;
 }
 
-static int usb_hcd_nxp_remove(struct platform_device *pdev)
+static int ohci_hcd_nxp_remove(struct platform_device *pdev)
 {
         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 
         usb_remove_hcd(hcd);
-        nxp_stop_hc();
+        ohci_nxp_stop_hc();
         usb_put_hcd(hcd);
         clk_disable(usb_pll_clk);
         clk_put(usb_pll_clk);
@@ -366,20 +319,40 @@ static int usb_hcd_nxp_remove(struct platform_device *pdev)
 MODULE_ALIAS("platform:usb-ohci");
 
 #ifdef CONFIG_OF
-static const struct of_device_id usb_hcd_nxp_match[] = {
+static const struct of_device_id ohci_hcd_nxp_match[] = {
         { .compatible = "nxp,ohci-nxp" },
         {},
 };
-MODULE_DEVICE_TABLE(of, usb_hcd_nxp_match);
+MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match);
 #endif
 
-static struct platform_driver usb_hcd_nxp_driver = {
+static struct platform_driver ohci_hcd_nxp_driver = {
         .driver = {
                 .name = "usb-ohci",
                 .owner  = THIS_MODULE,
-                .of_match_table = of_match_ptr(usb_hcd_nxp_match),
+                .of_match_table = of_match_ptr(ohci_hcd_nxp_match),
         },
-        .probe = usb_hcd_nxp_probe,
-        .remove = usb_hcd_nxp_remove,
+        .probe = ohci_hcd_nxp_probe,
+        .remove = ohci_hcd_nxp_remove,
 };
 
+static int __init ohci_nxp_init(void)
+{
+        if (usb_disabled())
+                return -ENODEV;
+
+        pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+        ohci_init_driver(&ohci_nxp_hc_driver, NULL);
+        return platform_driver_register(&ohci_hcd_nxp_driver);
+}
+module_init(ohci_nxp_init);
+
+static void __exit ohci_nxp_cleanup(void)
+{
+        platform_driver_unregister(&ohci_hcd_nxp_driver);
+}
+module_exit(ohci_nxp_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL v2");