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Message-Id: <1372347109-5563-1-git-send-email-manjunath.goudar@linaro.org>
Date: Thu, 27 Jun 2013 21:01:49 +0530
From: Manjunath Goudar <manjunath.goudar@...aro.org>
To: linux-usb@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org, patches@...aro.org,
stern@...land.harvard.edu, arnd@...aro.org,
manjunath.goudar@...aro.org, linaro-kernel@...ts.linaro.org,
Greg KH <greg@...ah.com>, Wan ZongShun <mcuos.com@...il.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH] USB: EHCI: make ehci-w90X900 a separate driver
Separate the W90X900(W90P910) on-chip host controller driver from
ehci-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;
however, note that other changes are still needed before W90X900(W90P910)
can be booted with a multi-platform kernel
and an ehci driver that only works on one of them.
With the infrastructure added by Alan Stern in patch 3e0232039
"USB: EHCI: prepare to make ehci-hcd a library module", we can
avoid this problem by turning a bus glue into a separate
module, as we do here for the w90X900 bus glue.
Signed-off-by: Manjunath Goudar <manjunath.goudar@...aro.org>
Acked-by: Arnd Bergmann <arnd@...db.de>
Cc: Greg KH <greg@...ah.com>
Cc: Alan Stern <stern@...land.harvard.edu>
Cc: Wan ZongShun <mcuos.com@...il.com>
Cc: linux-usb@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
drivers/usb/host/Kconfig | 2 +-
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ehci-hcd.c | 5 ---
drivers/usb/host/ehci-w90x900.c | 85 ++++++++++++++++-----------------------
4 files changed, 37 insertions(+), 56 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index a0a63df..f35f71e 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -244,7 +244,7 @@ config USB_EHCI_MV
SoCs, see USB_EHCI_HCD_ORION for those.
config USB_W90X900_EHCI
- bool "W90X900(W90P910) EHCI support"
+ tristate "W90X900(W90P910) EHCI support"
depends on ARCH_W90X900
---help---
Enables support for the W90X900 USB controller
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 7664db8..28adb3f 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-atmel.o
obj-$(CONFIG_USB_EHCI_MSM) += ehci-msm.o
obj-$(CONFIG_USB_EHCI_TEGRA) += ehci-tegra.o
obj-$(CONFIG_USB_EHCI_MV) += ehci-mv.o
+obj-$(CONFIG_USB_W90X900_EHCI) += ehci-w90x900.o
obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o
obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 5717dcd..4a5644e 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1249,11 +1249,6 @@ MODULE_LICENSE ("GPL");
#define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver
#endif
-#ifdef CONFIG_USB_W90X900_EHCI
-#include "ehci-w90x900.c"
-#define PLATFORM_DRIVER ehci_hcd_w90x900_driver
-#endif
-
#ifdef CONFIG_USB_OCTEON_EHCI
#include "ehci-octeon.c"
#define PLATFORM_DRIVER ehci_octeon_driver
diff --git a/drivers/usb/host/ehci-w90x900.c b/drivers/usb/host/ehci-w90x900.c
index 59e0e24..d9ecd79 100644
--- a/drivers/usb/host/ehci-w90x900.c
+++ b/drivers/usb/host/ehci-w90x900.c
@@ -11,13 +11,28 @@
*
*/
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/dma-mapping.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
+#include "ehci.h"
+
/* enable phy0 and phy1 for w90p910 */
#define ENPHY (0x01<<8)
#define PHY0_CTR (0xA4)
#define PHY1_CTR (0xA8)
+#define DRIVER_DESC "w90p910 usb ehci driver!"
+
+static const char hcd_name[] = "ehci-w90x900 ";
+
+static struct hc_driver __read_mostly ehci_w90x900_hc_driver;
+
static int usb_w90x900_probe(const struct hc_driver *driver,
struct platform_device *pdev)
{
@@ -99,54 +114,6 @@ void usb_w90x900_remove(struct usb_hcd *hcd, struct platform_device *pdev)
usb_put_hcd(hcd);
}
-static const struct hc_driver ehci_w90x900_hc_driver = {
- .description = hcd_name,
- .product_desc = "Nuvoton w90x900 EHCI Host Controller",
- .hcd_priv_size = sizeof(struct ehci_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = ehci_irq,
- .flags = HCD_USB2|HCD_MEMORY,
-
- /*
- * basic lifecycle operations
- */
- .reset = ehci_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,
-#ifdef CONFIG_PM
- .bus_suspend = ehci_bus_suspend,
- .bus_resume = ehci_bus_resume,
-#endif
- .relinquish_port = ehci_relinquish_port,
- .port_handed_over = ehci_port_handed_over,
-
- .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
-};
-
static int ehci_w90x900_probe(struct platform_device *pdev)
{
if (usb_disabled())
@@ -173,7 +140,25 @@ static struct platform_driver ehci_hcd_w90x900_driver = {
},
};
+static int __init ehci_w90X900_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+ ehci_init_driver(&ehci_w90x900_hc_driver, NULL);
+ return platform_driver_register(&ehci_hcd_w90x900_driver);
+}
+module_init(ehci_w90X900_init);
+
+static void __exit ehci_w90X900_cleanup(void)
+{
+ platform_driver_unregister(&ehci_hcd_w90x900_driver);
+}
+module_exit(ehci_w90X900_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Wan ZongShun <mcuos.com@...il.com>");
-MODULE_DESCRIPTION("w90p910 usb ehci driver!");
-MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:w90p910-ehci");
+MODULE_LICENSE("GPL v2");
--
1.7.9.5
--
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