[V2,6/8] USB: EHCI: make ehci-msm a separate driver

Message ID 1360923853-7875-7-git-send-email-manjunath.goudar@linaro.org
State New
Headers show

Commit Message

manjunath.goudar@linaro.org Feb. 15, 2013, 10:24 a.m.
Separate the Qualcomm On-Chip host controller driver from ehci-hcd host code
into its own driver module.

In V2:
Tegra patch related changes removed from this patch.

Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: David Brown <davidb@codeaurora.org>
Cc: Daniel Walker <dwalker@fifo99.com>
Cc: Bryan Huntsman <bryanh@codeaurora.org>
Cc: Brian Swetland <swetland@google.com>
Cc: linux-usb@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/usb/host/Kconfig    |    2 +-
 drivers/usb/host/Makefile   |    1 +
 drivers/usb/host/ehci-hcd.c |    6 +--
 drivers/usb/host/ehci-msm.c |   85 +++++++++++++++++++------------------------
 4 files changed, 40 insertions(+), 54 deletions(-)

Comments

Alan Stern Feb. 20, 2013, 4:31 p.m. | #1
On Fri, 15 Feb 2013, Manjunath Goudar wrote:

> Separate the Qualcomm On-Chip host controller driver from ehci-hcd host code
> into its own driver module.

> --- a/drivers/usb/host/ehci-msm.c
> +++ b/drivers/usb/host/ehci-msm.c

> +static const char hcd_name[] = "msm_hsusb_host";

This should be something more like "ehci-msm".  Of course, that means 
you have to leave the ehci_msm_driver.driver.name field unchanged.

Alan Stern

Patch

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 4e15b87..d5ae838 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -187,7 +187,7 @@  config USB_EHCI_HCD_AT91
           Atmel chips.
 
 config USB_EHCI_MSM
-	bool "Support for MSM on-chip EHCI USB controller"
+	tristate "Support for MSM on-chip EHCI USB controller"
 	depends on USB_EHCI_HCD && ARCH_MSM
 	select USB_EHCI_ROOT_HUB_TT
 	select USB_MSM_OTG
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 1fe0579..75d98b9 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -33,6 +33,7 @@  obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-atmel.o
 obj-$(CONFIG_USB_EHCI_S5P)      += ehci-s5p.o
 obj-$(CONFIG_USB_EHCI_MV)       += ehci-mv.o
 obj-$(CONFIG_USB_EHCI_HCD_VT8500)+= ehci-vt8500.o
+obj-$(CONFIG_USB_EHCI_MSM)      += ehci-msm.o
 obj-$(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 eefa3d7..d802b95 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1287,11 +1287,6 @@  MODULE_LICENSE ("GPL");
 #define PLATFORM_DRIVER		ehci_octeon_driver
 #endif
 
-#ifdef CONFIG_USB_EHCI_MSM
-#include "ehci-msm.c"
-#define PLATFORM_DRIVER		ehci_msm_driver
-#endif
-
 #ifdef CONFIG_TILE_USB
 #include "ehci-tilegx.c"
 #define	PLATFORM_DRIVER		ehci_hcd_tilegx_driver
@@ -1327,6 +1322,7 @@  MODULE_LICENSE ("GPL");
 	!IS_ENABLED(CONFIG_USB_EHCI_S5P) && \
 	!IS_ENABLED(CONFIG_USB_EHCI_MV) && \
 	!IS_ENABLED(CONFIG_ARCH_VT8500) && \
+	!IS_ENABLED(CONFIG_USB_EHCI_MSM) && \
 	!defined(PS3_SYSTEM_BUS_DRIVER) && \
 	!defined(OF_PLATFORM_DRIVER) && \
 	!defined(XILINX_OF_PLATFORM_DRIVER)
diff --git a/drivers/usb/host/ehci-msm.c b/drivers/usb/host/ehci-msm.c
index 88a49c8..a9a0357 100644
--- a/drivers/usb/host/ehci-msm.c
+++ b/drivers/usb/host/ehci-msm.c
@@ -26,12 +26,22 @@ 
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/pm_runtime.h>
-
 #include <linux/usb/otg.h>
 #include <linux/usb/msm_hsusb_hw.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/io.h>
+
+#include "ehci.h"
 
 #define MSM_USB_BASE (hcd->regs)
 
+#define DRIVER_DESC "Qualcomm On-Chip EHCI Host Controller"
+
+static const char hcd_name[] = "msm_hsusb_host";
+static struct hc_driver __read_mostly msm_hc_driver;
 static struct usb_phy *phy;
 
 static int ehci_msm_reset(struct usb_hcd *hcd)
@@ -56,52 +66,6 @@  static int ehci_msm_reset(struct usb_hcd *hcd)
 	return 0;
 }
 
-static struct hc_driver msm_hc_driver = {
-	.description		= hcd_name,
-	.product_desc		= "Qualcomm On-Chip EHCI Host Controller",
-	.hcd_priv_size		= sizeof(struct ehci_hcd),
-
-	/*
-	 * generic hardware linkage
-	 */
-	.irq			= ehci_irq,
-	.flags			= HCD_USB2 | HCD_MEMORY,
-
-	.reset			= ehci_msm_reset,
-	.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,
-	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
-
-	/*
-	 * scheduling support
-	 */
-	.get_frame_number	= ehci_get_frame,
-
-	/*
-	 * root hub support
-	 */
-	.hub_status_data	= ehci_hub_status_data,
-	.hub_control		= ehci_hub_control,
-	.relinquish_port	= ehci_relinquish_port,
-	.port_handed_over	= ehci_port_handed_over,
-
-	/*
-	 * PM support
-	 */
-	.bus_suspend		= ehci_bus_suspend,
-	.bus_resume		= ehci_bus_resume,
-};
-
 static int ehci_msm_probe(struct platform_device *pdev)
 {
 	struct usb_hcd *hcd;
@@ -222,7 +186,32 @@  static struct platform_driver ehci_msm_driver = {
 	.probe	= ehci_msm_probe,
 	.remove	= ehci_msm_remove,
 	.driver = {
-		   .name = "msm_hsusb_host",
+		   .name = hcd_name,
 		   .pm = &ehci_msm_dev_pm_ops,
 	},
 };
+
+static const struct ehci_driver_overrides msm_overrides __initdata = {
+	.reset = ehci_msm_reset,
+};
+
+static int __init ehci_msm_init(void)
+{
+	if (usb_disabled())
+		return -ENODEV;
+
+	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+	ehci_init_driver(&msm_hc_driver, &msm_overrides);
+	return platform_driver_register(&ehci_msm_driver);
+}
+module_init(ehci_msm_init);
+
+static void __exit ehci_msm_cleanup(void)
+{
+	platform_driver_unregister(&ehci_msm_driver);
+}
+module_exit(ehci_msm_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_ALIAS("platform:msm-ehci");
+MODULE_LICENSE("GPL");