[PATCH] USB: EHCI: make ehci-s5p a separate driver

[manjunath.goudar at linaro.org]

From: Manjunath Goudar <manjunath.goudar at linaro.org>

Separate the s5p host controller driver from ehci-hcd host code
into its own driver module.

Signed-off-by: Manjunath Goudar <manjunath.goudar at linaro.org>
Cc: Greg KH <greg at kroah.com>
Cc: Alan Stern <stern at rowland.harvard.edu>
Cc: Kukjin Kim <kgene.kim at samsung.com>
Cc: Kyungmin Park <kyungmin.park at samsung.com>
Cc: Grant Likely <grant.likely at secretlab.ca>
Cc: Rob Herring <rob.herring at calxeda.com>
Cc: linux-usb at vger.kernel.org
---
 drivers/usb/host/Kconfig    |    2 +-
 drivers/usb/host/Makefile   |    1 +
 drivers/usb/host/ehci-hcd.c |    6 +---
 drivers/usb/host/ehci-s5p.c |   69 ++++++++++++++++++++++++-------------------
 4 files changed, 41 insertions(+), 37 deletions(-)

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 1ef37d7..8ffbafa 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -215,7 +215,7 @@ config USB_EHCI_SH
 	  If you use the PCI EHCI controller, this option is not necessary.
 
 config USB_EHCI_S5P
-       boolean "S5P EHCI support"
+       tristate "S5P EHCI support"
        depends on USB_EHCI_HCD && PLAT_S5P
        help
 	 Enable support for the S5P SOC's on-chip EHCI controller.
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index b301243..77e0331 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -30,6 +30,7 @@ obj-$(CONFIG_USB_EHCI_MXC)	+= ehci-mxc.o
 obj-$(CONFIG_USB_EHCI_HCD_SPEAR)+= ehci-spear.o
 obj-$(CONFIG_USB_OXU210HP_HCD)	+= oxu210hp-hcd.o
 obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-atmel.o
+obj-$(CONFIG_USB_EHCI_S5P)      += ehci-s5p.o
 obj-$(CONFIG_USB_ISP116X_HCD)	+= isp116x-hcd.o
 obj-$(CONFIG_USB_ISP1362_HCD)	+= isp1362-hcd.o
 obj-$(CONFIG_USB_OHCI_HCD)	+= ohci-hcd.o
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index dda3d1b..fa0e665 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1312,11 +1312,6 @@ MODULE_LICENSE ("GPL");
 #define PLATFORM_DRIVER		tegra_ehci_driver
 #endif
 
-#ifdef CONFIG_USB_EHCI_S5P
-#include "ehci-s5p.c"
-#define PLATFORM_DRIVER		s5p_ehci_driver
-#endif
-
 #ifdef CONFIG_SPARC_LEON
 #include "ehci-grlib.c"
 #define PLATFORM_DRIVER		ehci_grlib_driver
@@ -1339,6 +1334,7 @@ MODULE_LICENSE ("GPL");
 	!IS_ENABLED(CONFIG_PLAT_SPEAR) && \
 	!defined(PLATFORM_DRIVER) && \
 	!IS_ENABLED(CONFIG_ARCH_AT91) && \
+	!IS_ENABLED(CONFIG_USB_EHCI_S5P) && \
 	!defined(PS3_SYSTEM_BUS_DRIVER) && \
 	!defined(OF_PLATFORM_DRIVER) && \
 	!defined(XILINX_OF_PLATFORM_DRIVER)
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index 20ebf6a..6ddf526 100644
--- a/drivers/usb/host/ehci-s5p.c
+++ b/drivers/usb/host/ehci-s5p.c
@@ -20,6 +20,17 @@
 #include <linux/usb/phy.h>
 #include <linux/usb/samsung_usb_phy.h>
 #include <plat/usb-phy.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/io.h>
+#include <linux/usb/otg.h>
+#include <linux/dma-mapping.h>
+
+#include "ehci.h"
+
+#define DRIVER_DESC "EHCI s5p driver"
 
 #define EHCI_INSNREG00(base)			(base + 0x90)
 #define EHCI_INSNREG00_ENA_INCR16		(0x1 << 25)
@@ -30,6 +41,10 @@
 	(EHCI_INSNREG00_ENA_INCR16 | EHCI_INSNREG00_ENA_INCR8 |	\
 	 EHCI_INSNREG00_ENA_INCR4 | EHCI_INSNREG00_ENA_INCRX_ALIGN)
 
+static const char hcd_name[] = "ehci-s5p";
+static struct hc_driver __read_mostly s5p_ehci_hc_driver;
+
+
 struct s5p_ehci_hcd {
 	struct device *dev;
 	struct usb_hcd *hcd;
@@ -39,36 +54,6 @@ struct s5p_ehci_hcd {
 	struct s5p_ehci_platdata *pdata;
 };
 
-static const struct hc_driver s5p_ehci_hc_driver = {
-	.description		= hcd_name,
-	.product_desc		= "S5P EHCI Host Controller",
-	.hcd_priv_size		= sizeof(struct ehci_hcd),
-
-	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2,
-
-	.reset			= ehci_setup,
-	.start			= ehci_run,
-	.stop			= ehci_stop,
-	.shutdown		= ehci_shutdown,
-
-	.get_frame_number	= ehci_get_frame,
-
-	.urb_enqueue		= ehci_urb_enqueue,
-	.urb_dequeue		= ehci_urb_dequeue,
-	.endpoint_disable	= ehci_endpoint_disable,
-	.endpoint_reset		= ehci_endpoint_reset,
-
-	.hub_status_data	= ehci_hub_status_data,
-	.hub_control		= ehci_hub_control,
-	.bus_suspend		= ehci_bus_suspend,
-	.bus_resume		= ehci_bus_resume,
-
-	.relinquish_port	= ehci_relinquish_port,
-	.port_handed_over	= ehci_port_handed_over,
-
-	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
-};
 
 static void s5p_ehci_phy_enable(struct s5p_ehci_hcd *s5p_ehci)
 {
@@ -322,5 +307,27 @@ static struct platform_driver s5p_ehci_driver = {
 		.of_match_table = of_match_ptr(exynos_ehci_match),
 	}
 };
+static const struct ehci_driver_overrides s5p_overrides __initdata = {
+	.reset = ehci_setup,
+};
+
+static int __init ehci_s5p_init(void)
+{
+	if (usb_disabled())
+		return -ENODEV;
+
+	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+	ehci_init_driver(&s5p_ehci_hc_driver, &s5p_overrides);
+	return platform_driver_register(&s5p_ehci_driver);
+}
+module_init(ehci_s5p_init);
+
+static void __exit ehci_s5p_cleanup(void)
+{
+	platform_driver_unregister(&s5p_ehci_driver);
+}
+module_exit(ehci_s5p_cleanup);
 
-MODULE_ALIAS("platform:s5p-ehci");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_ALIAS("platform:ehci-s5p");
+MODULE_LICENSE("GPL");
-- 
1.7.9.5