Subject: [PATCH 05/10] USB: EHCI: make ehci-atmel a separate driver

From: [email-masked] (manjunath.goudar at linaro.org)
Date: Thu, 7 Feb 2013 23:04:02 +0530

From: Manjunath Goudar <[email-masked]>

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

Signed-off-by: Manjunath Goudar <[email-masked]>
Cc: Alan Stern <[email-masked]>
Cc: Greg KH <[email-masked]>
Cc: Grant Likely <[email-masked]>
Cc: Rob Herring <[email-masked]>
Cc: Andrew Victor <[email-masked]>
Cc: Nicolas Ferre <[email-masked]>
Cc: Jean-Christophe Plagniol-Villard <[email-masked]>
Cc: linux-usb at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
---
 drivers/usb/host/Kconfig      |    7 ++++
 drivers/usb/host/Makefile     |    1 +
 drivers/usb/host/ehci-atmel.c |   78 ++++++++++++++++++++++-------------------
 drivers/usb/host/ehci-hcd.c   |    6 +---
 4 files changed, 51 insertions(+), 41 deletions(-)

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 3689b7b..5a13f9d 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -176,6 +176,13 @@ config USB_EHCI_HCD_ORION
         ---help---
           Enables support for the on-chip EHCI controller on
           Morvell Orion chips.
+config USB_EHCI_HCD_AT91
+        tristate  "Support for Atmel on-chip EHCI USB controller"
+        depends on USB_EHCI_HCD && ARCH_AT91
+        default y
+        ---help---
+          Enables support for the on-chip EHCI controller on
+          Atmel chips.
 
 config USB_EHCI_MSM
 	bool "Support for MSM on-chip EHCI USB controller"
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 23b07dd..96b4839 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_USB_EHCI_HCD_OMAP) += ehci-omap.o
 obj-$(CONFIG_USB_EHCI_HCD_SPEAR)+= ehci-spear.o
 obj-$(CONFIG_USB_EHCI_HCD_ORION)+= ehci-orion.o
 obj-$(CONFIG_USB_OXU210HP_HCD)	+= oxu210hp-hcd.o
+obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-atmel.o
 obj-$(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-atmel.c b/drivers/usb/host/ehci-atmel.c
index 27639487..2f06711 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -15,6 +15,19 @@
 #include <linux/platform_device.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/io.h>
+#include <linux/dma-mapping.h>
+
+#include "ehci.h"
+
+#define DRIVER_DESC "EHCI atmel driver"
+
+static const char hcd_name[] = "ehci-atmel";
+static struct hc_driver __read_mostly ehci_atmel_hc_driver;
 
 /* interface and function clocks */
 static struct clk *iclk, *fclk;
@@ -60,41 +73,6 @@ static int ehci_atmel_setup(struct usb_hcd *hcd)
 	return ehci_setup(hcd);
 }
 
-static const struct hc_driver ehci_atmel_hc_driver = {
-	.description		= hcd_name,
-	.product_desc		= "Atmel EHCI UHP HS",
-	.hcd_priv_size		= sizeof(struct ehci_hcd),
-
-	/* generic hardware linkage */
-	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2,
-
-	/* basic lifecycle operations */
-	.reset			= ehci_atmel_setup,
-	.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,
-
-	/* 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,
-	.relinquish_port	= ehci_relinquish_port,
-	.port_handed_over	= ehci_port_handed_over,
-
-	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
-};
-
 static u64 at91_ehci_dma_mask = DMA_BIT_MASK(32);
 
 static int ehci_atmel_drv_probe(struct platform_device *pdev)
@@ -210,7 +188,35 @@ static struct platform_driver ehci_atmel_driver = {
 	.remove		= ehci_atmel_drv_remove,
 	.shutdown	= usb_hcd_platform_shutdown,
 	.driver		= {
-		.name	= "atmel-ehci",
+		.name	= hcd_name,
 		.of_match_table	= of_match_ptr(atmel_ehci_dt_ids),
 	},
 };
+
+static const struct ehci_driver_overrides atmel_overrides __initdata = {
+	.reset = ehci_atmel_setup,
+};
+
+static int __init ehci_atmel_init(void)
+{
+	if (usb_disabled())
+		return -ENODEV;
+
+	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+	ehci_init_driver(&ehci_atmel_hc_driver, &atmel_overrides);
+	return platform_driver_register(&ehci_atmel_driver);
+}
+module_init(ehci_atmel_init);
+
+static void __exit ehci_atmel_cleanup(void)
+{
+	platform_driver_unregister(&ehci_atmel_driver);
+}
+module_exit(ehci_atmel_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+
+MODULE_ALIAS("platform:ehci-atmel");
+MODULE_AUTHOR("Nicolas Ferre");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 5a19a57..628ed139 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1272,11 +1272,6 @@ MODULE_LICENSE ("GPL");
 #define	PLATFORM_DRIVER		ehci_hcd_w90x900_driver
 #endif
 
-#ifdef CONFIG_ARCH_AT91
-#include "ehci-atmel.c"
-#define	PLATFORM_DRIVER		ehci_atmel_driver
-#endif
-
 #ifdef CONFIG_USB_OCTEON_EHCI
 #include "ehci-octeon.c"
 #define PLATFORM_DRIVER		ehci_octeon_driver
@@ -1334,6 +1329,7 @@ MODULE_LICENSE ("GPL");
 	!defined(PLATFORM_DRIVER) && \
 	!IS_ENABLED(CONFIG_USB_EHCI_HCD_OMAP) && \
 	!IS_ENABLED(CONFIG_PLAT_SPEAR) && \
+	!IS_ENABLED(CONFIG_ARCH_AT91) && \
 	!defined(PS3_SYSTEM_BUS_DRIVER) && \
 	!defined(OF_PLATFORM_DRIVER) && \
 	!defined(XILINX_OF_PLATFORM_DRIVER)
-- 
1.7.9.5