From patchwork Mon Oct 24 16:46:28 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ahaslam@baylibre.com X-Patchwork-Id: 9392677 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2A0416077A for ; Mon, 24 Oct 2016 16:57:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 16301291B0 for ; Mon, 24 Oct 2016 16:57:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 08B1C291B3; Mon, 24 Oct 2016 16:57:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3712F291B0 for ; Mon, 24 Oct 2016 16:57:46 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1byiXm-00039a-N1; Mon, 24 Oct 2016 16:56:14 +0000 Received: from mail-wm0-x22a.google.com ([2a00:1450:400c:c09::22a]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1byiP4-00026y-9z for linux-arm-kernel@lists.infradead.org; Mon, 24 Oct 2016 16:47:20 +0000 Received: by mail-wm0-x22a.google.com with SMTP id c78so113872684wme.0 for ; Mon, 24 Oct 2016 09:46:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=K3lRy826YpTcsegS344zgCOdzxkiOe9JDDNwUAf5rI4=; b=sedUZUThxl8bVVJBzX5Eyzz27LxTOJSCBr1b2yhHf+UI9DPFZRpE8w5Q2Q2jbar2Jo PL1OoLWDfl+RUDcpmrI+8BT/ATmSYGQGwaq4cvzDFWEe+bQEsogYPWe00B0CCJ9n5Ht/ zDbqG41ZpDUXORxVI1r03c0DSycqU1W70Pq+/LR7664Pq6Z3Tzdw4xP2Jg+kO+Y6/CXh ckvHFIyNprOlQneyMi21FA7w5UELOrf9UATTaZbmSJkjwp61iCDU25ZSYTeN4EN1CODM zALRNsR5V8muker+ukSPdhobVteR+0xsbbdk7xvS5B4rmyTkKx2whHx6vF0+2ZvPrjzE qH4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=K3lRy826YpTcsegS344zgCOdzxkiOe9JDDNwUAf5rI4=; b=ZDF9cpydzl149tF92QflGzWCw1WRBK6HixhXfBaC5JAcfRb1+qjvvZ7CtJ1pN5dY1I wLJP3gffkLAQooIehZT2X3GsKDQH6MA5rV3sDstE2D1jG4q57a9nlk3DHCo6VgP0wPsW +gJK9d3rhlSunWdIOEFzNuf2EaOnefK+Zi6lltowWPff6RzAcI/ls7IlrkSKETLkxXzX +p8viWXnvgCEVFdcsdquTOlq0i9O15IC2RJsF1HIIEWqttBOgtKAfChO4tuOuAyQ1fpo Rbh4BFDWsaa/fw0+/pxfB4TIuZHM1Y3e69IqdxlxLf9oV9vTPhNCEitUuyqL7xBf+poZ 9ycg== X-Gm-Message-State: AA6/9RlCllGKxYCmDrslfVtDLCs6k9LcoyxSqi5wljziPfmaWFSXkbeYSeiBAK1HQkN0Kejn X-Received: by 10.28.125.150 with SMTP id y144mr24137761wmc.77.1477327612210; Mon, 24 Oct 2016 09:46:52 -0700 (PDT) Received: from localhost.localdomain ([90.63.244.31]) by smtp.gmail.com with ESMTPSA id o62sm15710148wmg.9.2016.10.24.09.46.51 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 24 Oct 2016 09:46:51 -0700 (PDT) From: ahaslam@baylibre.com To: gregkh@linuxfoundation.org, johan@kernel.org, robh+dt@kernel.org, nsekhar@ti.com, stern@rowland.harvard.edu, khilman@baylibre.com, sshtylyov@ru.mvista.com, david@lechnology.com, manjunath.goudar@linaro.org, broonie@kernel.org, abailon@baylibre.com Subject: [PATCH/RFT v2 11/17] USB: OHCI: make ohci-da8xx a separate driver Date: Mon, 24 Oct 2016 18:46:28 +0200 Message-Id: <20161024164634.4330-12-ahaslam@baylibre.com> X-Mailer: git-send-email 2.10.1.502.g6598894 In-Reply-To: <20161024164634.4330-1-ahaslam@baylibre.com> References: <20161024164634.4330-1-ahaslam@baylibre.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161024_094714_979154_9250FA34 X-CRM114-Status: GOOD ( 22.82 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Manjunath Goudar Separate the Davinci OHCI 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 --- drivers/usb/host/Kconfig | 2 +- drivers/usb/host/Makefile | 1 + drivers/usb/host/ohci-da8xx.c | 185 +++++++++++++++++------------------------- drivers/usb/host/ohci-hcd.c | 18 ---- 4 files changed, 76 insertions(+), 130 deletions(-) diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 83b6cec..642c6fe8 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -479,7 +479,7 @@ config USB_OHCI_HCD_OMAP3 OMAP3 and later chips. config USB_OHCI_HCD_DAVINCI - bool "OHCI support for TI DaVinci DA8xx" + tristate "OHCI support for TI DaVinci DA8xx" depends on ARCH_DAVINCI_DA8XX depends on USB_OHCI_HCD=y select PHY_DA8XX_USB diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 6ef785b..2644537 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_USB_OHCI_HCD_AT91) += ohci-at91.o obj-$(CONFIG_USB_OHCI_HCD_S3C2410) += ohci-s3c2410.o obj-$(CONFIG_USB_OHCI_HCD_LPC32XX) += ohci-nxp.o obj-$(CONFIG_USB_OHCI_HCD_PXA27X) += ohci-pxa27x.o +obj-$(CONFIG_USB_OHCI_HCD_DAVINCI) += ohci-da8xx.o obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o obj-$(CONFIG_USB_FHCI_HCD) += fhci.o diff --git a/drivers/usb/host/ohci-da8xx.c b/drivers/usb/host/ohci-da8xx.c index e98066d..5585d9e 100644 --- a/drivers/usb/host/ohci-da8xx.c +++ b/drivers/usb/host/ohci-da8xx.c @@ -11,16 +11,31 @@ * kind, whether express or implied. */ +#include +#include #include #include +#include +#include #include -#include #include #include +#include +#include +#include +#include -#ifndef CONFIG_ARCH_DAVINCI_DA8XX -#error "This file is DA8xx bus glue. Define CONFIG_ARCH_DAVINCI_DA8XX." -#endif +#include "ohci.h" + +#define DRIVER_DESC "OHCI DA8XX driver" + +static const char hcd_name[] = "ohci-da8xx"; + +static struct hc_driver __read_mostly ohci_da8xx_hc_driver; + +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); static struct clk *usb11_clk; static struct phy *usb11_phy; @@ -73,7 +88,7 @@ static void ohci_da8xx_ocic_handler(struct da8xx_ohci_root_hub *hub) hub->set_power(0); } -static int ohci_da8xx_init(struct usb_hcd *hcd) +static int ohci_da8xx_reset(struct usb_hcd *hcd) { struct device *dev = hcd->self.controller; struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev); @@ -93,7 +108,7 @@ static int ohci_da8xx_init(struct usb_hcd *hcd) */ ohci->num_ports = 1; - result = ohci_init(ohci); + result = ohci_setup(hcd); if (result < 0) { ohci_da8xx_disable(); return result; @@ -121,30 +136,12 @@ static int ohci_da8xx_init(struct usb_hcd *hcd) return result; } -static void ohci_da8xx_stop(struct usb_hcd *hcd) -{ - ohci_stop(hcd); - ohci_da8xx_disable(); -} - -static int ohci_da8xx_start(struct usb_hcd *hcd) -{ - struct ohci_hcd *ohci = hcd_to_ohci(hcd); - int result; - - result = ohci_run(ohci); - if (result < 0) - ohci_da8xx_stop(hcd); - - return result; -} - /* * Update the status data from the hub with the over-current indicator change. */ static int ohci_da8xx_hub_status_data(struct usb_hcd *hcd, char *buf) { - int length = ohci_hub_status_data(hcd, buf); + int length = orig_ohci_hub_status_data(hcd, buf); /* See if we have OCIC flag set */ if (ocic_flag) { @@ -226,66 +223,13 @@ static int ohci_da8xx_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, } } - return ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); + return orig_ohci_hub_control(hcd, typeReq, wValue, + wIndex, buf, wLength); } -static const struct hc_driver ohci_da8xx_hc_driver = { - .description = hcd_name, - .product_desc = "DA8xx OHCI", - .hcd_priv_size = sizeof(struct ohci_hcd), - - /* - * generic hardware linkage - */ - .irq = ohci_irq, - .flags = HCD_USB11 | HCD_MEMORY, - - /* - * basic lifecycle operations - */ - .reset = ohci_da8xx_init, - .start = ohci_da8xx_start, - .stop = ohci_da8xx_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_da8xx_hub_status_data, - .hub_control = ohci_da8xx_hub_control, - -#ifdef CONFIG_PM - .bus_suspend = ohci_bus_suspend, - .bus_resume = ohci_bus_resume, -#endif - .start_port_reset = ohci_start_port_reset, -}; - /*-------------------------------------------------------------------------*/ - -/** - * usb_hcd_da8xx_probe - initialize DA8xx-based HCDs - * Context: !in_interrupt() - * - * Allocates basic resources for this USB host controller, and - * then invokes the start() method for the HCD associated with it - * through the hotplug entry's driver_data. - */ -static int usb_hcd_da8xx_probe(const struct hc_driver *driver, - struct platform_device *pdev) +static int ohci_da8xx_probe(struct platform_device *pdev) { struct da8xx_ohci_root_hub *hub = dev_get_platdata(&pdev->dev); struct usb_hcd *hcd; @@ -295,6 +239,11 @@ static int usb_hcd_da8xx_probe(const struct hc_driver *driver, if (hub == NULL) return -ENODEV; + hcd = usb_create_hcd(&ohci_da8xx_hc_driver, &pdev->dev, + dev_name(&pdev->dev)); + if (!hcd) + return -ENOMEM; + usb11_clk = devm_clk_get(&pdev->dev, "usb11"); if (IS_ERR(usb11_clk)) { if (PTR_ERR(usb11_clk) != -EPROBE_DEFER) @@ -309,9 +258,6 @@ static int usb_hcd_da8xx_probe(const struct hc_driver *driver, return PTR_ERR(usb11_phy); } - hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); - if (!hcd) - return -ENOMEM; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); hcd->regs = devm_ioremap_resource(&pdev->dev, mem); @@ -323,13 +269,12 @@ static int usb_hcd_da8xx_probe(const struct hc_driver *driver, hcd->rsrc_start = mem->start; hcd->rsrc_len = resource_size(mem); - ohci_hcd_init(hcd_to_ohci(hcd)); - irq = platform_get_irq(pdev, 0); if (irq < 0) { error = -ENODEV; goto err; } + error = usb_add_hcd(hcd, irq, 0); if (error) goto err; @@ -348,35 +293,14 @@ static int usb_hcd_da8xx_probe(const struct hc_driver *driver, return error; } -/** - * usb_hcd_da8xx_remove - shutdown processing for DA8xx-based HCDs - * @dev: USB Host Controller being removed - * Context: !in_interrupt() - * - * Reverses the effect of usb_hcd_da8xx_probe(), first invoking - * the HCD's stop() method. It is always called from a thread - * context, normally "rmmod", "apmd", or something similar. - */ -static inline void -usb_hcd_da8xx_remove(struct usb_hcd *hcd, struct platform_device *pdev) +static int ohci_da8xx_remove(struct platform_device *pdev) { + struct usb_hcd *hcd = platform_get_drvdata(pdev); struct da8xx_ohci_root_hub *hub = dev_get_platdata(&pdev->dev); hub->ocic_notify(NULL); usb_remove_hcd(hcd); usb_put_hcd(hcd); -} - -static int ohci_hcd_da8xx_drv_probe(struct platform_device *dev) -{ - return usb_hcd_da8xx_probe(&ohci_da8xx_hc_driver, dev); -} - -static int ohci_hcd_da8xx_drv_remove(struct platform_device *dev) -{ - struct usb_hcd *hcd = platform_get_drvdata(dev); - - usb_hcd_da8xx_remove(hcd, dev); return 0; } @@ -426,12 +350,16 @@ static int ohci_da8xx_resume(struct platform_device *dev) } #endif +static const struct ohci_driver_overrides da8xx_overrides __initconst = { + .reset = ohci_da8xx_reset +}; + /* * Driver definition to register with platform structure. */ static struct platform_driver ohci_hcd_da8xx_driver = { - .probe = ohci_hcd_da8xx_drv_probe, - .remove = ohci_hcd_da8xx_drv_remove, + .probe = ohci_da8xx_probe, + .remove = ohci_da8xx_remove, .shutdown = usb_hcd_platform_shutdown, #ifdef CONFIG_PM .suspend = ohci_da8xx_suspend, @@ -442,4 +370,39 @@ static int ohci_da8xx_resume(struct platform_device *dev) }, }; +static int __init ohci_da8xx_init(void) +{ + + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + ohci_init_driver(&ohci_da8xx_hc_driver, &da8xx_overrides); + + /* + * The Davinci da8xx HW has some unusual quirks, which require + * da8xx-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_da8xx_hc_driver.hub_control; + orig_ohci_hub_status_data = ohci_da8xx_hc_driver.hub_status_data; + + ohci_da8xx_hc_driver.hub_status_data = ohci_da8xx_hub_status_data; + ohci_da8xx_hc_driver.hub_control = ohci_da8xx_hub_control; + + return platform_driver_register(&ohci_hcd_da8xx_driver); +} +module_init(ohci_da8xx_init); + +static void __exit ohci_da8xx_cleanup(void) +{ + platform_driver_unregister(&ohci_hcd_da8xx_driver); +} +module_exit(ohci_da8xx_cleanup); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:ohci"); diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 1700908..8de174a 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1219,11 +1219,6 @@ void ohci_init_driver(struct hc_driver *drv, #define SA1111_DRIVER ohci_hcd_sa1111_driver #endif -#ifdef CONFIG_USB_OHCI_HCD_DAVINCI -#include "ohci-da8xx.c" -#define DAVINCI_PLATFORM_DRIVER ohci_hcd_da8xx_driver -#endif - #ifdef CONFIG_USB_OHCI_HCD_PPC_OF #include "ohci-ppc-of.c" #define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver @@ -1303,19 +1298,9 @@ static int __init ohci_hcd_mod_init(void) goto error_tmio; #endif -#ifdef DAVINCI_PLATFORM_DRIVER - retval = platform_driver_register(&DAVINCI_PLATFORM_DRIVER); - if (retval < 0) - goto error_davinci; -#endif - return retval; /* Error path */ -#ifdef DAVINCI_PLATFORM_DRIVER - platform_driver_unregister(&DAVINCI_PLATFORM_DRIVER); - error_davinci: -#endif #ifdef TMIO_OHCI_DRIVER platform_driver_unregister(&TMIO_OHCI_DRIVER); error_tmio: @@ -1351,9 +1336,6 @@ static int __init ohci_hcd_mod_init(void) static void __exit ohci_hcd_mod_exit(void) { -#ifdef DAVINCI_PLATFORM_DRIVER - platform_driver_unregister(&DAVINCI_PLATFORM_DRIVER); -#endif #ifdef TMIO_OHCI_DRIVER platform_driver_unregister(&TMIO_OHCI_DRIVER); #endif