[V2,2/8] USB: EHCI: make ehci-atmel a separate driver

Message ID 1360923853-7875-3-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 Atmel host controller driver from ehci-hcd host code
into its own driver module.

In V2:
Resolved below compiler error.
drivers/usb/host/ehci-atmel.c: In function 'ehci_atmel_drv_remove':
drivers/usb/host/ehci-atmel.c:167: error: implicit declaration of function 'ehci_shutdown'

Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Greg KH <greg@kroah.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Andrew Victor <linux@maxim.org.za>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: linux-usb@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/usb/host/Kconfig      |    8 +++++
 drivers/usb/host/Makefile     |    1 +
 drivers/usb/host/ehci-atmel.c |   76 ++++++++++++++++++++++-------------------
 drivers/usb/host/ehci-hcd.c   |   10 ++----
 drivers/usb/host/ehci.h       |    2 +-
 5 files changed, 53 insertions(+), 44 deletions(-)

Comments

Bo Shen Feb. 18, 2013, 9:44 a.m. | #1
On 02/15/2013 06:24 PM, Manjunath Goudar wrote:
> Separate the Atmel host controller driver from ehci-hcd host code
> into its own driver module.
>
> In V2:
> Resolved below compiler error.
> drivers/usb/host/ehci-atmel.c: In function 'ehci_atmel_drv_remove':
> drivers/usb/host/ehci-atmel.c:167: error: implicit declaration of function 'ehci_shutdown'
>
> Signed-off-by: Manjunath Goudar<manjunath.goudar@linaro.org>
> Cc: Alan Stern<stern@rowland.harvard.edu>
> Cc: Greg KH<greg@kroah.com>
> Cc: Grant Likely<grant.likely@secretlab.ca>
> Cc: Rob Herring<rob.herring@calxeda.com>
> Cc: Andrew Victor<linux@maxim.org.za>
> Cc: Nicolas Ferre<nicolas.ferre@atmel.com>
> Cc: Jean-Christophe Plagniol-Villard<plagnioj@jcrosoft.com>
> Cc: linux-usb@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> ---
>   drivers/usb/host/Kconfig      |    8 +++++
>   drivers/usb/host/Makefile     |    1 +
>   drivers/usb/host/ehci-atmel.c |   76 ++++++++++++++++++++++-------------------
>   drivers/usb/host/ehci-hcd.c   |   10 ++----
>   drivers/usb/host/ehci.h       |    2 +-
>   5 files changed, 53 insertions(+), 44 deletions(-)
>
> diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> index 15e8032..1ef37d7 100644
> --- a/drivers/usb/host/Kconfig
> +++ b/drivers/usb/host/Kconfig
> @@ -170,6 +170,14 @@ config USB_EHCI_HCD_SPEAR
>             Enables support for the on-chip EHCI controller on
>             ST SPEAr 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"
>   	depends on USB_EHCI_HCD&&  ARCH_MSM
> diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
> index c8fcde9..b301243 100644
> --- a/drivers/usb/host/Makefile
> +++ b/drivers/usb/host/Makefile
> @@ -29,6 +29,7 @@ obj-$(CONFIG_USB_EHCI_HCD_PLATFORM)	+= ehci-platform.o
>   obj-$(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_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..3cd0dd4 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 +188,33 @@ static struct platform_driver ehci_atmel_driver = {
>   	.remove		= ehci_atmel_drv_remove,
>   	.shutdown	= usb_hcd_platform_shutdown,
>   	.driver		= {
> -		.name	= "atmel-ehci",
> +		.name	= hcd_name,

This change will cause atmel ehci won't work with the none device tree 
kernel.

it can be fixed with replace other places using "atmel-ehci" with 
<hcd_name>, that means replace "atmel-ehci" with "ehci-atmel" at other 
places.

Best Regards,
Bo Shen
Arnd Bergmann Feb. 18, 2013, 10:12 a.m. | #2
On Monday 18 February 2013, Bo Shen wrote:
> > -             .name   = "atmel-ehci",
> > +             .name   = hcd_name,
> 
> This change will cause atmel ehci won't work with the none device tree 
> kernel.
> 
> it can be fixed with replace other places using "atmel-ehci" with 
> <hcd_name>, that means replace "atmel-ehci" with "ehci-atmel" at other 
> places.

Ah, that is right. Thanks for pointing it out!

Manjunath, please revert this change and ensure you are not changing
the contents of the 'platform_driver->name' field in any of the drivers.

	Arnd
manjunath.goudar@linaro.org Feb. 18, 2013, 10:57 a.m. | #3
On 18 February 2013 15:42, Arnd Bergmann <arnd@linaro.org> wrote:

> On Monday 18 February 2013, Bo Shen wrote:
> > > -             .name   = "atmel-ehci",
> > > +             .name   = hcd_name,
> >
> > This change will cause atmel ehci won't work with the none device tree
> > kernel.
> >
> > it can be fixed with replace other places using "atmel-ehci" with
> > <hcd_name>, that means replace "atmel-ehci" with "ehci-atmel" at other
> > places.
>
> Ah, that is right. Thanks for pointing it out!
>
> Manjunath, please revert this change and ensure you are not changing
> the contents of the 'platform_driver->name' field in any of the drivers.
>
>         Arnd
>

Thanks for identfied unrelated changes in my patches, I will revert back
those changes.

Thanks
Manjunath Goudar

Patch

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 15e8032..1ef37d7 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -170,6 +170,14 @@  config USB_EHCI_HCD_SPEAR
           Enables support for the on-chip EHCI controller on
           ST SPEAr 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"
 	depends on USB_EHCI_HCD && ARCH_MSM
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index c8fcde9..b301243 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -29,6 +29,7 @@  obj-$(CONFIG_USB_EHCI_HCD_PLATFORM)	+= ehci-platform.o
 obj-$(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_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..3cd0dd4 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 +188,33 @@  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 c4afd86..dda3d1b 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -352,7 +352,7 @@  static void ehci_silence_controller(struct ehci_hcd *ehci)
  * This forcibly disables dma and IRQs, helping kexec and other cases
  * where the next system software may expect clean state.
  */
-static void ehci_shutdown(struct usb_hcd *hcd)
+void ehci_shutdown(struct usb_hcd *hcd)
 {
 	struct ehci_hcd	*ehci = hcd_to_ehci(hcd);
 
@@ -366,7 +366,7 @@  static void ehci_shutdown(struct usb_hcd *hcd)
 
 	hrtimer_cancel(&ehci->hrtimer);
 }
-
+EXPORT_SYMBOL_GPL(ehci_shutdown);
 /*-------------------------------------------------------------------------*/
 
 /*
@@ -1282,11 +1282,6 @@  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
@@ -1343,6 +1338,7 @@  MODULE_LICENSE ("GPL");
 	!IS_ENABLED(CONFIG_USB_EHCI_MXC) && \
 	!IS_ENABLED(CONFIG_PLAT_SPEAR) && \
 	!defined(PLATFORM_DRIVER) && \
+	!IS_ENABLED(CONFIG_ARCH_AT91) && \
 	!defined(PS3_SYSTEM_BUS_DRIVER) && \
 	!defined(OF_PLATFORM_DRIVER) && \
 	!defined(XILINX_OF_PLATFORM_DRIVER)
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 36c3a82..593d3bb 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -798,7 +798,7 @@  struct ehci_driver_overrides {
 extern void	ehci_init_driver(struct hc_driver *drv,
 				const struct ehci_driver_overrides *over);
 extern int	ehci_setup(struct usb_hcd *hcd);
-
+extern void ehci_shutdown(struct usb_hcd *hcd);
 #ifdef CONFIG_PM
 extern int	ehci_suspend(struct usb_hcd *hcd, bool do_wakeup);
 extern int	ehci_resume(struct usb_hcd *hcd, bool hibernated);