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

[Jean-Christophe PLAGNIOL-VILLARD]

On 23:04 Thu 07 Feb     , manjunath.goudar@xxxxxxxxxx wrote:
> From: Manjunath Goudar <manjunath.goudar@xxxxxxxxxx>
> 
> Separate the Atmel host controller driver from ehci-hcd host code
> into its own driver module.
> 
> Signed-off-by: Manjunath Goudar <manjunath.goudar@xxxxxxxxxx>
> Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> Cc: Greg KH <greg@xxxxxxxxx>
> Cc: Grant Likely <grant.likely@xxxxxxxxxxxx>
> Cc: Rob Herring <rob.herring@xxxxxxxxxxx>
> Cc: Andrew Victor <linux@xxxxxxxxxxxx>
> Cc: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
> Cc: Jean-Christophe Plagniol-Villard <plagnioj@xxxxxxxxxxxx>
> Cc: linux-usb@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>

Best Regards,
J.
> ---
>  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
> 
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