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Message-ID: <20130205091145.GI32118@arwen.pp.htv.fi>
Date: Tue, 5 Feb 2013 11:11:45 +0200
From: Felipe Balbi <balbi@...com>
To: Roger Quadros <rogerq@...com>
CC: <tony@...mide.com>, <linux@....linux.org.uk>,
<sameo@...ux.intel.com>, <balbi@...com>,
<stern@...land.harvard.edu>, <gregkh@...uxfoundation.org>,
<eballetbo@...il.com>, <javier@...hile0.org>,
<sshtylyov@...sta.com>, <linux-usb@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 01/30] USB: EHCI: split ehci-omap out to a separate driver
On Mon, Jan 28, 2013 at 01:30:02PM +0200, Roger Quadros wrote:
> From: Alan Stern <stern@...land.harvard.edu>
>
> This patch (as1645) converts ehci-omap over to the new "ehci-hcd is a
> library" approach, so that it can coexist peacefully with other EHCI
> platform drivers and can make use of the private area allocated at
> the end of struct ehci_hcd.
>
> Signed-off-by: Alan Stern <stern@...land.harvard.edu>
for ehci-omap:
Acked-by: Felipe Balbi <balbi@...com>
> ---
> drivers/usb/host/Kconfig | 2 +-
> drivers/usb/host/Makefile | 1 +
> drivers/usb/host/ehci-hcd.c | 6 +---
> drivers/usb/host/ehci-omap.c | 76 +++++++++++++++++++-----------------------
> 4 files changed, 37 insertions(+), 48 deletions(-)
>
> diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> index 3a21c5d..11e102e 100644
> --- a/drivers/usb/host/Kconfig
> +++ b/drivers/usb/host/Kconfig
> @@ -155,7 +155,7 @@ config USB_EHCI_MXC
> Variation of ARC USB block used in some Freescale chips.
>
> config USB_EHCI_HCD_OMAP
> - bool "EHCI support for OMAP3 and later chips"
> + tristate "EHCI support for OMAP3 and later chips"
> depends on USB_EHCI_HCD && ARCH_OMAP
> default y
> ---help---
> diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
> index 001fbff..56de410 100644
> --- a/drivers/usb/host/Makefile
> +++ b/drivers/usb/host/Makefile
> @@ -27,6 +27,7 @@ obj-$(CONFIG_USB_EHCI_HCD) += ehci-hcd.o
> obj-$(CONFIG_USB_EHCI_PCI) += ehci-pci.o
> obj-$(CONFIG_USB_EHCI_HCD_PLATFORM) += ehci-platform.o
> obj-$(CONFIG_USB_EHCI_MXC) += ehci-mxc.o
> +obj-$(CONFIG_USB_EHCI_HCD_OMAP) += ehci-omap.o
>
> obj-$(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 09537b2..5a35246 100644
> --- a/drivers/usb/host/ehci-hcd.c
> +++ b/drivers/usb/host/ehci-hcd.c
> @@ -1251,11 +1251,6 @@ MODULE_LICENSE ("GPL");
> #define PLATFORM_DRIVER ehci_hcd_sh_driver
> #endif
>
> -#ifdef CONFIG_USB_EHCI_HCD_OMAP
> -#include "ehci-omap.c"
> -#define PLATFORM_DRIVER ehci_hcd_omap_driver
> -#endif
> -
> #ifdef CONFIG_PPC_PS3
> #include "ehci-ps3.c"
> #define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver
> @@ -1345,6 +1340,7 @@ MODULE_LICENSE ("GPL");
> !IS_ENABLED(CONFIG_USB_EHCI_HCD_PLATFORM) && \
> !IS_ENABLED(CONFIG_USB_CHIPIDEA_HOST) && \
> !IS_ENABLED(CONFIG_USB_EHCI_MXC) && \
> + !IS_ENABLED(CONFIG_USB_EHCI_HCD_OMAP) && \
> !defined(PLATFORM_DRIVER) && \
> !defined(PS3_SYSTEM_BUS_DRIVER) && \
> !defined(OF_PLATFORM_DRIVER) && \
> diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
> index b96a4bf..30fc482 100644
> --- a/drivers/usb/host/ehci-omap.c
> +++ b/drivers/usb/host/ehci-omap.c
> @@ -36,6 +36,9 @@
> * - convert to use hwmod and runtime PM
> */
>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/io.h>
> #include <linux/platform_device.h>
> #include <linux/slab.h>
> #include <linux/usb/ulpi.h>
> @@ -43,6 +46,10 @@
> #include <linux/pm_runtime.h>
> #include <linux/gpio.h>
> #include <linux/clk.h>
> +#include <linux/usb.h>
> +#include <linux/usb/hcd.h>
> +
> +#include "ehci.h"
>
> #include <linux/platform_data/usb-omap.h>
>
> @@ -57,9 +64,11 @@
> #define EHCI_INSNREG05_ULPI_EXTREGADD_SHIFT 8
> #define EHCI_INSNREG05_ULPI_WRDATA_SHIFT 0
>
> -/*-------------------------------------------------------------------------*/
> +#define DRIVER_DESC "OMAP-EHCI Host Controller driver"
>
> -static const struct hc_driver ehci_omap_hc_driver;
> +static const char hcd_name[] = "ehci-omap";
> +
> +/*-------------------------------------------------------------------------*/
>
>
> static inline void ehci_write(void __iomem *base, u32 reg, u32 val)
> @@ -166,6 +175,12 @@ static void disable_put_regulator(
> /* configure so an HC device and id are always provided */
> /* always called with process context; sleeping is OK */
>
> +static struct hc_driver __read_mostly ehci_omap_hc_driver;
> +
> +static const struct ehci_driver_overrides ehci_omap_overrides __initdata = {
> + .reset = omap_ehci_init,
> +};
> +
> /**
> * ehci_hcd_omap_probe - initialize TI-based HCDs
> *
> @@ -315,56 +330,33 @@ static struct platform_driver ehci_hcd_omap_driver = {
> /*.suspend = ehci_hcd_omap_suspend, */
> /*.resume = ehci_hcd_omap_resume, */
> .driver = {
> - .name = "ehci-omap",
> + .name = hcd_name,
> }
> };
>
> /*-------------------------------------------------------------------------*/
>
> -static const struct hc_driver ehci_omap_hc_driver = {
> - .description = hcd_name,
> - .product_desc = "OMAP-EHCI Host Controller",
> - .hcd_priv_size = sizeof(struct ehci_hcd),
> -
> - /*
> - * generic hardware linkage
> - */
> - .irq = ehci_irq,
> - .flags = HCD_MEMORY | HCD_USB2,
> -
> - /*
> - * basic lifecycle operations
> - */
> - .reset = omap_ehci_init,
> - .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,
> +static int __init ehci_omap_init(void)
> +{
> + if (usb_disabled())
> + return -ENODEV;
>
> - /*
> - * scheduling support
> - */
> - .get_frame_number = ehci_get_frame,
> + pr_info("%s: " DRIVER_DESC "\n", hcd_name);
>
> - /*
> - * 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,
> + ehci_init_driver(&ehci_omap_hc_driver, &ehci_omap_overrides);
> + return platform_driver_register(&ehci_hcd_omap_driver);
> +}
> +module_init(ehci_omap_init);
>
> - .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
> -};
> +static void __exit ehci_omap_cleanup(void)
> +{
> + platform_driver_unregister(&ehci_hcd_omap_driver);
> +}
> +module_exit(ehci_omap_cleanup);
>
> MODULE_ALIAS("platform:omap-ehci");
> MODULE_AUTHOR("Texas Instruments, Inc.");
> MODULE_AUTHOR("Felipe Balbi <felipe.balbi@...ia.com>");
>
> +MODULE_DESCRIPTION(DRIVER_DESC);
> +MODULE_LICENSE("GPL");
> --
> 1.7.4.1
>
--
balbi
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