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@xxxxxxxxxx>
Signed-off-by: Deepak Saxena <dsaxena@xxxxxxxxxx>
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: Anand Gadiyar <gadiyar@xxxxxx>
Cc: Felipe Balbi <balbi@xxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
V3->V4:
-V3 modification revert back, only ohci->regs setting write()
function has been removed because ohci->regs doesn't get set until
usb_add_hcd.
V2->V3:
-RemoteWakeupConnected setting has been removed.
V1->V2:
-ohci_setup() removed because it is called in .reset member
of the ohci_hc_driver structure.
-The improper multi-line commenting style written in proper way.
('*' characters aligned in vertically).
---
drivers/usb/host/Kconfig | 2 +-
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ohci-hcd.c | 18 -------
drivers/usb/host/ohci-omap3.c | 118 +++++++++++++----------------------------
4 files changed, 40 insertions(+), 99 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 6aa2c3f..2a91a3f 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -375,7 +375,7 @@ config USB_OHCI_HCD_OMAP1
Enables support for the OHCI controller on OMAP1/2 chips.
config USB_OHCI_HCD_OMAP3
- bool "OHCI support for OMAP3 and later chips"
+ tristate "OHCI support for OMAP3 and later chips"
depends on (ARCH_OMAP3 || ARCH_OMAP4)
default y
---help---
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index cfbfe13..aa1721d 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -48,6 +48,7 @@ obj-$(CONFIG_USB_OHCI_HCD_PCI) += ohci-pci.o
obj-$(CONFIG_USB_OHCI_HCD_PLATFORM) += ohci-platform.o
obj-$(CONFIG_USB_OHCI_EXYNOS) += ohci-exynos.o
obj-$(CONFIG_USB_OHCI_HCD_OMAP1) += ohci-omap.o
+obj-$(CONFIG_USB_OHCI_HCD_OMAP3) += ohci-omap3.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index fcef838..5e9c334 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1182,11 +1182,6 @@ MODULE_LICENSE ("GPL");
#define S3C2410_PLATFORM_DRIVER ohci_hcd_s3c2410_driver
#endif
-#ifdef CONFIG_USB_OHCI_HCD_OMAP3
-#include "ohci-omap3.c"
-#define OMAP3_PLATFORM_DRIVER ohci_hcd_omap3_driver
-#endif
-
#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
#include "ohci-pxa27x.c"
#define PLATFORM_DRIVER ohci_hcd_pxa27x_driver
@@ -1284,12 +1279,6 @@ static int __init ohci_hcd_mod_init(void)
goto error_platform;
#endif
-#ifdef OMAP3_PLATFORM_DRIVER
- retval = platform_driver_register(&OMAP3_PLATFORM_DRIVER);
- if (retval < 0)
- goto error_omap3_platform;
-#endif
-
#ifdef OF_PLATFORM_DRIVER
retval = platform_driver_register(&OF_PLATFORM_DRIVER);
if (retval < 0)
@@ -1393,10 +1382,6 @@ static int __init ohci_hcd_mod_init(void)
platform_driver_unregister(&OF_PLATFORM_DRIVER);
error_of_platform:
#endif
-#ifdef OMAP3_PLATFORM_DRIVER
- platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
- error_omap3_platform:
-#endif
#ifdef PLATFORM_DRIVER
platform_driver_unregister(&PLATFORM_DRIVER);
error_platform:
@@ -1448,9 +1433,6 @@ static void __exit ohci_hcd_mod_exit(void)
#ifdef OF_PLATFORM_DRIVER
platform_driver_unregister(&OF_PLATFORM_DRIVER);
#endif
-#ifdef OMAP3_PLATFORM_DRIVER
- platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
-#endif
#ifdef PLATFORM_DRIVER
platform_driver_unregister(&PLATFORM_DRIVER);
#endif
diff --git a/drivers/usb/host/ohci-omap3.c b/drivers/usb/host/ohci-omap3.c
index a09af26..408d06a 100644
--- a/drivers/usb/host/ohci-omap3.c
+++ b/drivers/usb/host/ohci-omap3.c
@@ -29,90 +29,22 @@
* - add kernel-doc
*/
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/usb/otg.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
-#include <linux/of.h>
-#include <linux/dma-mapping.h>
-
-/*-------------------------------------------------------------------------*/
-
-static int ohci_omap3_init(struct usb_hcd *hcd)
-{
- dev_dbg(hcd->self.controller, "starting OHCI controller\n");
-
- return ohci_init(hcd_to_ohci(hcd));
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int ohci_omap3_start(struct usb_hcd *hcd)
-{
- struct ohci_hcd *ohci = hcd_to_ohci(hcd);
- int ret;
-
- /*
- * RemoteWakeupConnected has to be set explicitly before
- * calling ohci_run. The reset value of RWC is 0.
- */
- ohci->hc_control = OHCI_CTRL_RWC;
- writel(OHCI_CTRL_RWC, &ohci->regs->control);
-
- ret = ohci_run(ohci);
-
- if (ret < 0) {
- dev_err(hcd->self.controller, "can't start\n");
- ohci_stop(hcd);
- }
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
- return ret;
-}
+#include "ohci.h"
-/*-------------------------------------------------------------------------*/
+#define DRIVER_DESC "OHCI OMAP3 driver"
-static const struct hc_driver ohci_omap3_hc_driver = {
- .description = hcd_name,
- .product_desc = "OMAP3 OHCI Host Controller",
- .hcd_priv_size = sizeof(struct ohci_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = ohci_irq,
- .flags = HCD_USB11 | HCD_MEMORY,
-
- /*
- * basic lifecycle operations
- */
- .reset = ohci_omap3_init,
- .start = ohci_omap3_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 const char hcd_name[] = "ohci-omap3";
+static struct hc_driver __read_mostly ohci_omap3_hc_driver;
/*
* configure so an HC device and id are always provided
@@ -129,6 +61,7 @@ static const struct hc_driver ohci_omap3_hc_driver = {
static int ohci_hcd_omap3_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
+ struct ohci_hcd *ohci;
struct usb_hcd *hcd = NULL;
void __iomem *regs = NULL;
struct resource *res;
@@ -185,7 +118,12 @@ static int ohci_hcd_omap3_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
- ohci_hcd_init(hcd_to_ohci(hcd));
+ ohci = hcd_to_ohci(hcd);
+ /*
+ * RemoteWakeupConnected has to be set explicitly before
+ * calling ohci_run. The reset value of RWC is 0.
+ */
+ ohci->hc_control = OHCI_CTRL_RWC;
ret = usb_add_hcd(hcd, irq, 0);
if (ret) {
@@ -248,5 +186,25 @@ static struct platform_driver ohci_hcd_omap3_driver = {
},
};
+static int __init ohci_omap3_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+ ohci_init_driver(&ohci_omap3_hc_driver, NULL);
+ return platform_driver_register(&ohci_hcd_omap3_driver);
+}
+module_init(ohci_omap3_init);
+
+static void __exit ohci_omap3_cleanup(void)
+{
+ platform_driver_unregister(&ohci_hcd_omap3_driver);
+}
+module_exit(ohci_omap3_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_ALIAS("platform:ohci-omap3");
MODULE_AUTHOR("Anand Gadiyar <gadiyar@xxxxxx>");
+MODULE_LICENSE("GPL");
--
1.7.9.5
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