From patchwork Sat Mar 30 13:04:19 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 2367531 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id 12DA13FD40 for ; Sat, 30 Mar 2013 13:07:53 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ULvSM-0003kW-3i; Sat, 30 Mar 2013 13:04:26 +0000 Received: from moutng.kundenserver.de ([212.227.126.186]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ULvRy-0003gp-DH for linux-arm-kernel@lists.infradead.org; Sat, 30 Mar 2013 13:04:03 +0000 Received: from localhost.localdomain (HSI-KBW-46-223-90-92.hsi.kabel-badenwuerttemberg.de [46.223.90.92]) by mrelayeu.kundenserver.de (node=mrbap2) with ESMTP (Nemesis) id 0LySz0-1Ug3Jr157u-0166XD; Sat, 30 Mar 2013 14:03:57 +0100 From: Arnd Bergmann To: Alan Stern Subject: [PATCH v4 2/6] USB: EHCI: make ehci-spear a separate driver Date: Sat, 30 Mar 2013 14:04:19 +0100 Message-Id: <1364648663-29296-3-git-send-email-arnd@arndb.de> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1364648663-29296-1-git-send-email-arnd@arndb.de> References: <1364648663-29296-1-git-send-email-arnd@arndb.de> X-Provags-ID: V02:K0:yCzlDMrwgaCsWsRBIRJO22kgtyvp9kuXG7/cqiV0qDU lJYzJxgBYWW0Oz5n5YsxgRl0nwu2uD3zhb9x4uSoBbG0sYyvA9 Wsw6AXB/HUgGgoo2rD94YvS48dEqtNWa7cPxh4JNgkmq1VqKK1 MUa+AwQmmNidDzpa2aMsa1mXtYPYdGR5qy7+tu3LwSB6Jf4/7O UJr1RwEQ8ul1cN8hHGFNF4PuquPs9IGje/uHKtyQhTRGJEOYYO iXcjb8p1M646vDRIpBnK1SEUGvUMgFIUpsyg2njUl4+Gieis9N P39viVR7b6jRxC8A1R0ysbv9P/n1nUNLD46ez07/rok69A7Zrq lhNJTJUa5inTx1Rgdo9dQV2AEjoEdbKCs5exLUQe507B6OsvAO hZlyjQ6+TUJ9A== X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130330_090402_743995_1D4A2D7D X-CRM114-Status: GOOD ( 18.08 ) X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [212.227.126.186 listed in list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: spear-devel@list.st.com, Arnd Bergmann , Greg KH , Manjunath Goudar , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Deepak Saxena , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Manjunath Goudar Separate the SPEAr host controller driver from ehci-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; however, note that other changes are still needed before SPEAr can be booted with a multi-platform kernel, but they are queued in the arm-soc tree for 3.10. With the infrastructure added by Alan Stern in patch 3e0232039 "USB: EHCI: prepare to make ehci-hcd a library module", we can avoid this problem by turning a bus glue into a separate module, as we do here for the SPEAr bus glue. In V4 (arnd): - renamed all 'struct spear_ehci' pointers from 'ehci' to the less ambiguous 'sehci'. - folded trivial spear_start_ehci/spear_stop_ehci functions into callers. - brought back initialization of ehci->caps. In V3: - Detailed commit message added here about why this patch is required. - Eliminated ehci_spear_setup routine because hcd registers can be directly set in the spear_ehci_hcd_drv_probe function. - spear_overrides struct initialized. - Converted to using .extra_priv_size for allocating spear_ehci, and updated all users of that structure. - to_spear_ehci() macro modified for spear_ehci. In V2: - Replaced spear as SPEAr everywhere, leaving functions/variables/config options. Signed-off-by: Deepak Saxena Signed-off-by: Manjunath Goudar Signed-off-by: Arnd Bergmann Acked-by: Viresh Kumar Cc: Greg KH Cc: Alan Stern Cc: Shiraz Hashim Cc: linux-usb@vger.kernel.org Cc: spear-devel@list.st.com --- drivers/usb/host/Kconfig | 8 +++ drivers/usb/host/Makefile | 1 + drivers/usb/host/ehci-hcd.c | 6 +-- drivers/usb/host/ehci-spear.c | 115 +++++++++++++++++++----------------------- 4 files changed, 61 insertions(+), 69 deletions(-) diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index e5649c1..4723f79 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -174,6 +174,14 @@ config USB_EHCI_HCD_ORION on Marvell's mobile PXA and MMP SoC, see "EHCI support for Marvell PXA/MMP USB controller" for those. +config USB_EHCI_HCD_SPEAR + tristate "Support for ST SPEAr on-chip EHCI USB controller" + depends on USB_EHCI_HCD && PLAT_SPEAR + default y + ---help--- + Enables support for the on-chip EHCI controller on + ST SPEAr 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 9492f50..3e02471 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-$(CONFIG_USB_EHCI_HCD_OMAP) += ehci-omap.o obj-$(CONFIG_USB_EHCI_HCD_ORION) += ehci-orion.o +obj-$(CONFIG_USB_EHCI_HCD_SPEAR) += ehci-spear.o obj-$(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 1f97268..c8c70a1 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -1264,11 +1264,6 @@ MODULE_LICENSE ("GPL"); #define PLATFORM_DRIVER ehci_octeon_driver #endif -#ifdef CONFIG_PLAT_SPEAR -#include "ehci-spear.c" -#define PLATFORM_DRIVER spear_ehci_hcd_driver -#endif - #ifdef CONFIG_USB_EHCI_MSM #include "ehci-msm.c" #define PLATFORM_DRIVER ehci_msm_driver @@ -1315,6 +1310,7 @@ MODULE_LICENSE ("GPL"); !IS_ENABLED(CONFIG_USB_EHCI_MXC) && \ !IS_ENABLED(CONFIG_USB_EHCI_HCD_OMAP) && \ !IS_ENABLED(CONFIG_USB_EHCI_HCD_ORION) && \ + !IS_ENABLED(CONFIG_USB_EHCI_HCD_SPEAR) && \ !defined(PLATFORM_DRIVER) && \ !defined(PS3_SYSTEM_BUS_DRIVER) && \ !defined(OF_PLATFORM_DRIVER) && \ diff --git a/drivers/usb/host/ehci-spear.c b/drivers/usb/host/ehci-spear.c index 210bb67..61ecfb3 100644 --- a/drivers/usb/host/ehci-spear.c +++ b/drivers/usb/host/ehci-spear.c @@ -1,5 +1,5 @@ /* -* Driver for EHCI HCD on SPEAR SOC +* Driver for EHCI HCD on SPEAr SOC * * Copyright (C) 2010 ST Micro Electronics, * Deepak Sikri @@ -12,71 +12,30 @@ */ #include +#include +#include #include +#include +#include #include #include #include +#include +#include -struct spear_ehci { - struct ehci_hcd ehci; - struct clk *clk; -}; - -#define to_spear_ehci(hcd) (struct spear_ehci *)hcd_to_ehci(hcd) +#include "ehci.h" -static void spear_start_ehci(struct spear_ehci *ehci) -{ - clk_prepare_enable(ehci->clk); -} +#define DRIVER_DESC "EHCI SPEAr driver" -static void spear_stop_ehci(struct spear_ehci *ehci) -{ - clk_disable_unprepare(ehci->clk); -} +static const char hcd_name[] = "SPEAr-ehci"; -static int ehci_spear_setup(struct usb_hcd *hcd) -{ - struct ehci_hcd *ehci = hcd_to_ehci(hcd); - - /* registers start at offset 0x0 */ - ehci->caps = hcd->regs; +struct spear_ehci { + struct clk *clk; +}; - return ehci_setup(hcd); -} +#define to_spear_ehci(hcd) (struct spear_ehci *)(hcd_to_ehci(hcd)->priv) -static const struct hc_driver ehci_spear_hc_driver = { - .description = hcd_name, - .product_desc = "SPEAr EHCI", - .hcd_priv_size = sizeof(struct spear_ehci), - - /* generic hardware linkage */ - .irq = ehci_irq, - .flags = HCD_MEMORY | HCD_USB2, - - /* basic lifecycle operations */ - .reset = ehci_spear_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 struct hc_driver __read_mostly ehci_spear_hc_driver; #ifdef CONFIG_PM_SLEEP static int ehci_spear_drv_suspend(struct device *dev) @@ -104,7 +63,7 @@ static u64 spear_ehci_dma_mask = DMA_BIT_MASK(32); static int spear_ehci_hcd_drv_probe(struct platform_device *pdev) { struct usb_hcd *hcd ; - struct spear_ehci *ehci; + struct spear_ehci *sehci; struct resource *res; struct clk *usbh_clk; const struct hc_driver *driver = &ehci_spear_hc_driver; @@ -161,10 +120,13 @@ static int spear_ehci_hcd_drv_probe(struct platform_device *pdev) goto err_put_hcd; } - ehci = (struct spear_ehci *)hcd_to_ehci(hcd); - ehci->clk = usbh_clk; + sehci = to_spear_ehci(hcd); + sehci->clk = usbh_clk; + + /* registers start at offset 0x0 */ + hcd_to_ehci(hcd)->caps = hcd->regs; - spear_start_ehci(ehci); + clk_prepare_enable(sehci->clk); retval = usb_add_hcd(hcd, irq, IRQF_SHARED); if (retval) goto err_stop_ehci; @@ -172,7 +134,7 @@ static int spear_ehci_hcd_drv_probe(struct platform_device *pdev) return retval; err_stop_ehci: - spear_stop_ehci(ehci); + clk_disable_unprepare(sehci->clk); err_put_hcd: usb_put_hcd(hcd); fail: @@ -184,7 +146,7 @@ fail: static int spear_ehci_hcd_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); - struct spear_ehci *ehci_p = to_spear_ehci(hcd); + struct spear_ehci *sehci = to_spear_ehci(hcd); if (!hcd) return 0; @@ -192,8 +154,8 @@ static int spear_ehci_hcd_drv_remove(struct platform_device *pdev) BUG(); usb_remove_hcd(hcd); - if (ehci_p->clk) - spear_stop_ehci(ehci_p); + if (sehci->clk) + clk_disable_unprepare(sehci->clk); usb_put_hcd(hcd); return 0; @@ -216,4 +178,29 @@ static struct platform_driver spear_ehci_hcd_driver = { } }; +static const struct ehci_driver_overrides spear_overrides __initdata = { + .extra_priv_size = sizeof(struct spear_ehci), +}; + +static int __init ehci_spear_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + + ehci_init_driver(&ehci_spear_hc_driver, &spear_overrides); + return platform_driver_register(&spear_ehci_hcd_driver); +} +module_init(ehci_spear_init); + +static void __exit ehci_spear_cleanup(void) +{ + platform_driver_unregister(&spear_ehci_hcd_driver); +} +module_exit(ehci_spear_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); MODULE_ALIAS("platform:spear-ehci"); +MODULE_AUTHOR("Deepak Sikri"); +MODULE_LICENSE("GPL");