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Mon, 24 Jun 2013 23:24:19 -0700 (PDT) Received-SPF: neutral (google.com: 2607:f8b0:400e:c01::22e is neither permitted nor denied by best guess record for domain of manjunath.goudar@linaro.org) client-ip=2607:f8b0:400e:c01::22e; Received: by mail-pb0-f46.google.com with SMTP id rq2so12030388pbb.5 for ; Mon, 24 Jun 2013 23:24:19 -0700 (PDT) X-Received: by 10.66.122.99 with SMTP id lr3mr9771189pab.187.1372141459306; Mon, 24 Jun 2013 23:24:19 -0700 (PDT) Received: from manjunath-Latitude-E6420.LGE.NET ([203.247.149.152]) by mx.google.com with ESMTPSA id kq2sm23556483pab.19.2013.06.24.23.24.14 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 24 Jun 2013 23:24:18 -0700 (PDT) From: Manjunath Goudar To: linux-usb@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, patches@linaro.org, stern@rowland.harvard.edu, arnd@linaro.org, manjunath.goudar@linaro.org, linaro-kernel@lists.linaro.org, Arnd Bergmann , Greg KH Subject: [PATCH V3 6/6] USB: OHCI: make ohci-s3c2410 a separate driver Date: Tue, 25 Jun 2013 11:53:28 +0530 Message-Id: <1372141408-9894-7-git-send-email-manjunath.goudar@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1372141408-9894-1-git-send-email-manjunath.goudar@linaro.org> References: <1370585013-12809-1-git-send-email-manjunath.goudar@linaro.org> <1372141408-9894-1-git-send-email-manjunath.goudar@linaro.org> X-Gm-Message-State: ALoCoQktQOslXXRY/A8XavC5BuxKH0CqEm/hYSgiWbBeL00Dq3BuCStQ55r82foVkYFxN4ZZ1ZMG X-Original-Sender: manjunath.goudar@linaro.org X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 2607:f8b0:400c:c02::232 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Precedence: list Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org List-ID: X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , Separate the Samsung OHCI S3CXXXX host controller driver from ohci-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; it would be nice to have in 3.11. Signed-off-by: Manjunath Goudar Cc: Arnd Bergmann Cc: Alan Stern Cc: Greg KH Cc: linux-usb@vger.kernel.org V2: -Set non-standard fields in ohci_s3c2410_hc_driver manually, rather than relying on an expanded struct ohci_driver_overrides. -Save orig_ohci_hub_control and orig_ohci_hub_status_data rather than relying on ohci_hub_control and hub_status_data being exported. V3: -Kconfig wrong parentheses discription fixed. -ohci_setup() has been removed because it is called in .reset member of the ohci_hc_driver structure. --- drivers/usb/host/Kconfig | 8 +++ drivers/usb/host/Makefile | 1 + drivers/usb/host/ohci-hcd.c | 18 ------ drivers/usb/host/ohci-s3c2410.c | 128 +++++++++++++++++---------------------- 4 files changed, 66 insertions(+), 89 deletions(-) diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index e4dc9ab..f19524f 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -390,6 +390,14 @@ config USB_OHCI_HCD_SPEAR Enables support for the on-chip OHCI controller on ST SPEAr chips. +config USB_OHCI_HCD_S3CXXXX + tristate "Support for S3CXXXX on-chip OHCI USB controller" + depends on USB_OHCI_HCD && (ARCH_S3C24XX || ARCH_S3C64XX) + default y + ---help--- + Enables support for the on-chip OHCI controller on + S3CXXXX chips. + config USB_OHCI_HCD_AT91 tristate "Support for Atmel on-chip OHCI USB controller" depends on USB_OHCI_HCD && ARCH_AT91 diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index f3e02c0..9fa4b3e 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -50,6 +50,7 @@ obj-$(CONFIG_USB_OHCI_HCD_OMAP1) += ohci-omap.o obj-$(CONFIG_USB_OHCI_HCD_OMAP3) += ohci-omap3.o obj-$(CONFIG_USB_OHCI_HCD_SPEAR) += ohci-spear.o obj-$(CONFIG_USB_OHCI_HCD_AT91) += ohci-at91.o +obj-$(CONFIG_USB_OHCI_HCD_S3CXXXX) += ohci-s3c2410.o obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o obj-$(CONFIG_USB_FHCI_HCD) += fhci.o diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index b48c892..b69a49e 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1177,11 +1177,6 @@ MODULE_LICENSE ("GPL"); #define SA1111_DRIVER ohci_hcd_sa1111_driver #endif -#if defined(CONFIG_ARCH_S3C24XX) || defined(CONFIG_ARCH_S3C64XX) -#include "ohci-s3c2410.c" -#define S3C2410_PLATFORM_DRIVER ohci_hcd_s3c2410_driver -#endif - #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx) #include "ohci-pxa27x.c" #define PLATFORM_DRIVER ohci_hcd_pxa27x_driver @@ -1293,12 +1288,6 @@ static int __init ohci_hcd_mod_init(void) goto error_tmio; #endif -#ifdef S3C2410_PLATFORM_DRIVER - retval = platform_driver_register(&S3C2410_PLATFORM_DRIVER); - if (retval < 0) - goto error_s3c2410; -#endif - #ifdef EP93XX_PLATFORM_DRIVER retval = platform_driver_register(&EP93XX_PLATFORM_DRIVER); if (retval < 0) @@ -1332,10 +1321,6 @@ static int __init ohci_hcd_mod_init(void) platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); error_ep93xx: #endif -#ifdef S3C2410_PLATFORM_DRIVER - platform_driver_unregister(&S3C2410_PLATFORM_DRIVER); - error_s3c2410: -#endif #ifdef TMIO_OHCI_DRIVER platform_driver_unregister(&TMIO_OHCI_DRIVER); error_tmio: @@ -1382,9 +1367,6 @@ static void __exit ohci_hcd_mod_exit(void) #ifdef EP93XX_PLATFORM_DRIVER platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); #endif -#ifdef S3C2410_PLATFORM_DRIVER - platform_driver_unregister(&S3C2410_PLATFORM_DRIVER); -#endif #ifdef TMIO_OHCI_DRIVER platform_driver_unregister(&TMIO_OHCI_DRIVER); #endif diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c index e125770..b0f6644 100644 --- a/drivers/usb/host/ohci-s3c2410.c +++ b/drivers/usb/host/ohci-s3c2410.c @@ -19,17 +19,34 @@ * This file is licenced under the GPL. */ -#include #include +#include +#include +#include +#include #include +#include +#include + +#include "ohci.h" + #define valid_port(idx) ((idx) == 1 || (idx) == 2) /* clock device associated with the hcd */ + +#define DRIVER_DESC "OHCI S3CXXXX driver" + +static const char hcd_name[] = "ohci-s3cxxxx"; + static struct clk *clk; static struct clk *usb_clk; +static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq, + u16 wValue, u16 wIndex, char *buf, u16 wLength); +static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf); + /* forward definitions */ static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc); @@ -93,7 +110,7 @@ ohci_s3c2410_hub_status_data(struct usb_hcd *hcd, char *buf) int orig; int portno; - orig = ohci_hub_status_data(hcd, buf); + orig = orig_ohci_hub_status_data(hcd, buf); if (info == NULL) return orig; @@ -164,7 +181,7 @@ static int ohci_s3c2410_hub_control( * process the request straight away and exit */ if (info == NULL) { - ret = ohci_hub_control(hcd, typeReq, wValue, + ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); goto out; } @@ -214,7 +231,7 @@ static int ohci_s3c2410_hub_control( break; } - ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); + ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); if (ret) goto out; @@ -373,8 +390,6 @@ static int usb_hcd_s3c2410_probe(const struct hc_driver *driver, s3c2410_start_hc(dev, hcd); - ohci_hcd_init(hcd_to_ohci(hcd)); - retval = usb_add_hcd(hcd, dev->resource[1].start, 0); if (retval != 0) goto err_ioremap; @@ -391,71 +406,7 @@ static int usb_hcd_s3c2410_probe(const struct hc_driver *driver, /*-------------------------------------------------------------------------*/ -static int -ohci_s3c2410_start(struct usb_hcd *hcd) -{ - struct ohci_hcd *ohci = hcd_to_ohci(hcd); - int ret; - - ret = ohci_init(ohci); - if (ret < 0) - return ret; - - ret = ohci_run(ohci); - if (ret < 0) { - dev_err(hcd->self.controller, "can't start %s\n", - hcd->self.bus_name); - ohci_stop(hcd); - return ret; - } - - return 0; -} - - -static const struct hc_driver ohci_s3c2410_hc_driver = { - .description = hcd_name, - .product_desc = "S3C24XX OHCI", - .hcd_priv_size = sizeof(struct ohci_hcd), - - /* - * generic hardware linkage - */ - .irq = ohci_irq, - .flags = HCD_USB11 | HCD_MEMORY, - - /* - * basic lifecycle operations - */ - .start = ohci_s3c2410_start, - .stop = ohci_stop, - .shutdown = ohci_shutdown, - - /* - * managing i/o requests and associated device resources - */ - .urb_enqueue = ohci_urb_enqueue, - .urb_dequeue = ohci_urb_dequeue, - .endpoint_disable = ohci_endpoint_disable, - - /* - * scheduling support - */ - .get_frame_number = ohci_get_frame, - - /* - * root hub support - */ - .hub_status_data = ohci_s3c2410_hub_status_data, - .hub_control = ohci_s3c2410_hub_control, -#ifdef CONFIG_PM - .bus_suspend = ohci_bus_suspend, - .bus_resume = ohci_bus_resume, -#endif - .start_port_reset = ohci_start_port_reset, -}; - -/* device driver */ +static struct hc_driver __read_mostly ohci_s3c2410_hc_driver; static int ohci_hcd_s3c2410_drv_probe(struct platform_device *pdev) { @@ -532,4 +483,39 @@ static struct platform_driver ohci_hcd_s3c2410_driver = { }, }; +static int __init ohci_s3cxxxx_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + ohci_init_driver(&ohci_s3c2410_hc_driver, NULL); + + /* + * The Samsung HW has some unusual quirks, which require + * Sumsung-specific workarounds. We override certain hc_driver + * functions here to achieve that. We explicitly do not enhance + * ohci_driver_overrides to allow this more easily, since this + * is an unusual case, and we don't want to encourage others to + * override these functions by making it too easy. + */ + + orig_ohci_hub_control = ohci_s3c2410_hc_driver.hub_control; + orig_ohci_hub_status_data = ohci_s3c2410_hc_driver.hub_status_data; + + ohci_s3c2410_hc_driver.hub_status_data = ohci_s3c2410_hub_status_data; + ohci_s3c2410_hc_driver.hub_control = ohci_s3c2410_hub_control; + + return platform_driver_register(&ohci_hcd_s3c2410_driver); +} +module_init(ohci_s3cxxxx_init); + +static void __exit ohci_s3cxxxx_cleanup(void) +{ + platform_driver_unregister(&ohci_hcd_s3c2410_driver); +} +module_exit(ohci_s3cxxxx_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:s3c2410-ohci");