From patchwork Mon Sep 16 10:10:10 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: manjunath.goudar@linaro.org X-Patchwork-Id: 20329 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-ve0-f200.google.com (mail-ve0-f200.google.com [209.85.128.200]) by ip-10-151-82-157.ec2.internal (Postfix) with ESMTPS id ED1AB24694 for ; Mon, 16 Sep 2013 10:11:02 +0000 (UTC) Received: by mail-ve0-f200.google.com with SMTP id oy12sf4178835veb.11 for ; Mon, 16 Sep 2013 03:11:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:delivered-to:from:to:cc:subject :date:message-id:in-reply-to:references:x-original-sender :x-original-authentication-results:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-unsubscribe; bh=Qlt7NhdUwHevCO4DB8WVZYWAAzdTNoeE4e7lgM2wBxE=; b=OZgSMy8L66rgyy/Ep7d9GfRgCvN8+6TzNb84pKBgxbEPoHJCyDkcU7bXaojzaWUyUl ZEfvnRkhWOVon8uSupzU76TJcL5j3Wol84RMnbUNMu8jyxl4k04kbY9CLBU9Ac8h9HFa P8C4KtFDl8c3COxqWxjr0YCdyS7B6VjkWiwi/vHVhhhbnICJd5v8haXbZpO5UtFkz+jg eRtPyqhhie/9PTWpJYdjUpdR3s+zC6tcbzERs1Hc4nZyckwksIV2hcuvImvO4UtRyg+C uXwV1qPR2TACWEfYEktH0C+C3Tq/kLZzgUuPVSV+aceIrAzgBuyNPzgFP5X4c3SFvUVa Gy6w== X-Gm-Message-State: ALoCoQl665809GoaH9gDCNKoNYpuh96yc4clUbKXfzQAefS/PiWiKEY/19gJD+Zu/I0gobPA4MGz X-Received: by 10.236.41.100 with SMTP id g64mr10548763yhb.31.1379326262475; Mon, 16 Sep 2013 03:11:02 -0700 (PDT) MIME-Version: 1.0 X-BeenThere: patchwork-forward@linaro.org Received: by 10.49.108.230 with SMTP id hn6ls2227522qeb.81.gmail; Mon, 16 Sep 2013 03:11:02 -0700 (PDT) X-Received: by 10.58.168.205 with SMTP id zy13mr4967831veb.19.1379326262396; Mon, 16 Sep 2013 03:11:02 -0700 (PDT) Received: from mail-vb0-f50.google.com (mail-vb0-f50.google.com [209.85.212.50]) by mx.google.com with ESMTPS id st7si6911638vdc.29.1969.12.31.16.00.00 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 16 Sep 2013 03:11:02 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.212.50 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) client-ip=209.85.212.50; Received: by mail-vb0-f50.google.com with SMTP id x14so2789476vbb.9 for ; Mon, 16 Sep 2013 03:11:02 -0700 (PDT) X-Received: by 10.221.40.10 with SMTP id to10mr1260557vcb.22.1379326262259; Mon, 16 Sep 2013 03:11:02 -0700 (PDT) X-Forwarded-To: patchwork-forward@linaro.org X-Forwarded-For: patch@linaro.org patchwork-forward@linaro.org Delivered-To: patches@linaro.org Received: by 10.220.174.196 with SMTP id u4csp87993vcz; Mon, 16 Sep 2013 03:11:01 -0700 (PDT) X-Received: by 10.68.113.195 with SMTP id ja3mr6181604pbb.34.1379326261096; Mon, 16 Sep 2013 03:11:01 -0700 (PDT) Received: from mail-pa0-f53.google.com (mail-pa0-f53.google.com [209.85.220.53]) by mx.google.com with ESMTPS id gx9si21289453pac.69.1969.12.31.16.00.00 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 16 Sep 2013 03:11:01 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.220.53 is neither permitted nor denied by best guess record for domain of manjunath.goudar@linaro.org) client-ip=209.85.220.53; Received: by mail-pa0-f53.google.com with SMTP id lb1so5138427pab.40 for ; Mon, 16 Sep 2013 03:11:00 -0700 (PDT) X-Received: by 10.66.14.3 with SMTP id l3mr1077430pac.162.1379326260662; Mon, 16 Sep 2013 03:11:00 -0700 (PDT) Received: from manjunath-Latitude-E6420.LGE.NET ([203.247.149.152]) by mx.google.com with ESMTPSA id sz3sm30166896pbc.5.1969.12.31.16.00.00 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 16 Sep 2013 03:11:00 -0700 (PDT) From: Manjunath Goudar To: linux-arm-kernel@lists.infradead.org Cc: patches@linaro.org, arnd@linaro.org, dsaxena@linaro.org, manjunath.goudar@linaro.org, linaro-kernel@lists.linaro.org, Arnd Bergmann , Greg KH , linux-usb@vger.kernel.org Subject: [PATCH V5 5/9] USB: OHCI: make ohci-at91 a separate driver Date: Mon, 16 Sep 2013 15:40:10 +0530 Message-Id: <1379326215-23047-6-git-send-email-manjunath.goudar@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1379326215-23047-1-git-send-email-manjunath.goudar@linaro.org> References: <1370585013-12809-1-git-send-email-manjunath.goudar@linaro.org> <1379326215-23047-1-git-send-email-manjunath.goudar@linaro.org> X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: manjunath.goudar@linaro.org X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.212.50 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 TI OHCI Atmel 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. Signed-off-by: Manjunath Goudar Signed-off-by: Deepak Saxena Acked-by: Alan Stern Cc: Arnd Bergmann Cc: Greg KH Cc: linux-usb@vger.kernel.org V3->V4: - Removed extra space after "tristate". - Removed extra space between function name and '(' characters. - MODULE_ALIAS line moved to last statement of ohci-at91 file. V2->V3: -The ohci_restart() function is not required in current scenario, only discarding connection state of integrated transceivers is sufficient, for this directly handling ohci->hc_control. V1->V2: -Set non-standard fields in ohci_at91_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. -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-at91.c | 156 +++++++++++++++++++----------------------- drivers/usb/host/ohci-hcd.c | 18 ----- 4 files changed, 79 insertions(+), 104 deletions(-) diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 00d22f5..6900b72 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -382,6 +382,14 @@ config USB_OHCI_HCD_SPEAR Enables support for the on-chip OHCI controller on ST SPEAr chips. +config USB_OHCI_HCD_AT91 + tristate "Support for Atmel on-chip OHCI USB controller" + depends on USB_OHCI_HCD && ARCH_AT91 + default y + ---help--- + Enables support for the on-chip OHCI controller on + Atmel chips. + config USB_OHCI_HCD_OMAP3 tristate "OHCI support for OMAP3 and later chips" depends on (ARCH_OMAP3 || ARCH_OMAP4) diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 9efcb7c..0d7a81a 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -50,6 +50,7 @@ obj-$(CONFIG_USB_OHCI_EXYNOS) += ohci-exynos.o obj-$(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_UHCI_HCD) += uhci-hcd.o obj-$(CONFIG_USB_FHCI_HCD) += fhci.o diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index caa3764..476b5a5 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -13,19 +13,24 @@ */ #include -#include +#include #include #include +#include #include +#include +#include +#include +#include +#include #include #include #include -#ifndef CONFIG_ARCH_AT91 -#error "CONFIG_ARCH_AT91 must be defined." -#endif + +#include "ohci.h" #define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS) #define at91_for_each_port(index) \ @@ -33,7 +38,17 @@ /* interface, function and usb clocks; sometimes also an AHB clock */ static struct clk *iclk, *fclk, *uclk, *hclk; +/* interface and function clocks; sometimes also an AHB clock */ + +#define DRIVER_DESC "OHCI Atmel driver" + +static const char hcd_name[] = "ohci-atmel"; + +static struct hc_driver __read_mostly ohci_at91_hc_driver; static int clocked; +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); extern int usb_disabled(void); @@ -117,6 +132,8 @@ static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); static int usb_hcd_at91_probe(const struct hc_driver *driver, struct platform_device *pdev) { + struct at91_usbh_data *board; + struct ohci_hcd *ohci; int retval; struct usb_hcd *hcd = NULL; @@ -177,8 +194,10 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver, } } + board = hcd->self.controller->platform_data; + ohci = hcd_to_ohci(hcd); + ohci->num_ports = board->ports; at91_start_hc(pdev); - ohci_hcd_init(hcd_to_ohci(hcd)); retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED); if (retval == 0) @@ -238,36 +257,6 @@ static void usb_hcd_at91_remove(struct usb_hcd *hcd, } /*-------------------------------------------------------------------------*/ - -static int -ohci_at91_reset (struct usb_hcd *hcd) -{ - struct at91_usbh_data *board = dev_get_platdata(hcd->self.controller); - struct ohci_hcd *ohci = hcd_to_ohci (hcd); - int ret; - - if ((ret = ohci_init(ohci)) < 0) - return ret; - - ohci->num_ports = board->ports; - return 0; -} - -static int -ohci_at91_start (struct usb_hcd *hcd) -{ - struct ohci_hcd *ohci = hcd_to_ohci (hcd); - int ret; - - if ((ret = ohci_run(ohci)) < 0) { - dev_err(hcd->self.controller, "can't start %s\n", - hcd->self.bus_name); - ohci_stop(hcd); - return ret; - } - return 0; -} - static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) { if (!valid_port(port)) @@ -297,8 +286,8 @@ static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) */ static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) { - struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller); - int length = ohci_hub_status_data(hcd, buf); + struct at91_usbh_data *pdata = hcd->self.controller->platform_data; + int length = orig_ohci_hub_status_data(hcd, buf); int port; at91_for_each_port(port) { @@ -376,7 +365,8 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, break; } - ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength); + ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, + buf, wLength); if (ret) goto out; @@ -430,51 +420,6 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, /*-------------------------------------------------------------------------*/ -static const struct hc_driver ohci_at91_hc_driver = { - .description = hcd_name, - .product_desc = "AT91 OHCI", - .hcd_priv_size = sizeof(struct ohci_hcd), - - /* - * generic hardware linkage - */ - .irq = ohci_irq, - .flags = HCD_USB11 | HCD_MEMORY, - - /* - * basic lifecycle operations - */ - .reset = ohci_at91_reset, - .start = ohci_at91_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_at91_hub_status_data, - .hub_control = ohci_at91_hub_control, -#ifdef CONFIG_PM - .bus_suspend = ohci_bus_suspend, - .bus_resume = ohci_bus_resume, -#endif - .start_port_reset = ohci_start_port_reset, -}; - -/*-------------------------------------------------------------------------*/ - static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) { struct platform_device *pdev = data; @@ -703,7 +648,11 @@ ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg) * REVISIT: some boards will be able to turn VBUS off... */ if (at91_suspend_entering_slow_clock()) { - ohci_usb_reset (ohci); + ohci->hc_control = ohci_readl(ohci, &ohci->regs->control); + ohci->hc_control &= OHCI_CTRL_RWC; + ohci_writel(ohci, ohci->hc_control, &ohci->regs->control); + ohci->rh_state = OHCI_RH_HALTED; + /* flush the writes */ (void) ohci_readl (ohci, &ohci->regs->control); at91_stop_clock(); @@ -730,8 +679,6 @@ static int ohci_hcd_at91_drv_resume(struct platform_device *pdev) #define ohci_hcd_at91_drv_resume NULL #endif -MODULE_ALIAS("platform:at91_ohci"); - static struct platform_driver ohci_hcd_at91_driver = { .probe = ohci_hcd_at91_drv_probe, .remove = ohci_hcd_at91_drv_remove, @@ -744,3 +691,40 @@ static struct platform_driver ohci_hcd_at91_driver = { .of_match_table = of_match_ptr(at91_ohci_dt_ids), }, }; + +static int __init ohci_at91_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + ohci_init_driver(&ohci_at91_hc_driver, NULL); + + /* + * The Atmel HW has some unusual quirks, which require Atmel-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_at91_hc_driver.hub_control; + orig_ohci_hub_status_data = ohci_at91_hc_driver.hub_status_data; + + ohci_at91_hc_driver.hub_status_data = ohci_at91_hub_status_data; + ohci_at91_hc_driver.hub_control = ohci_at91_hub_control; + + return platform_driver_register(&ohci_hcd_at91_driver); +} +module_init(ohci_at91_init); + +static void __exit ohci_at91_cleanup(void) +{ + platform_driver_unregister(&ohci_hcd_at91_driver); +} +module_exit(ohci_at91_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:at91_ohci"); diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 523f58e..2fdaaf8 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1192,11 +1192,6 @@ MODULE_LICENSE ("GPL"); #define EP93XX_PLATFORM_DRIVER ohci_hcd_ep93xx_driver #endif -#ifdef CONFIG_ARCH_AT91 -#include "ohci-at91.c" -#define AT91_PLATFORM_DRIVER ohci_hcd_at91_driver -#endif - #ifdef CONFIG_ARCH_LPC32XX #include "ohci-nxp.c" #define NXP_PLATFORM_DRIVER usb_hcd_nxp_driver @@ -1310,12 +1305,6 @@ static int __init ohci_hcd_mod_init(void) goto error_ep93xx; #endif -#ifdef AT91_PLATFORM_DRIVER - retval = platform_driver_register(&AT91_PLATFORM_DRIVER); - if (retval < 0) - goto error_at91; -#endif - #ifdef NXP_PLATFORM_DRIVER retval = platform_driver_register(&NXP_PLATFORM_DRIVER); if (retval < 0) @@ -1339,10 +1328,6 @@ static int __init ohci_hcd_mod_init(void) platform_driver_unregister(&NXP_PLATFORM_DRIVER); error_nxp: #endif -#ifdef AT91_PLATFORM_DRIVER - platform_driver_unregister(&AT91_PLATFORM_DRIVER); - error_at91: -#endif #ifdef EP93XX_PLATFORM_DRIVER platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); error_ep93xx: @@ -1394,9 +1379,6 @@ static void __exit ohci_hcd_mod_exit(void) #ifdef NXP_PLATFORM_DRIVER platform_driver_unregister(&NXP_PLATFORM_DRIVER); #endif -#ifdef AT91_PLATFORM_DRIVER - platform_driver_unregister(&AT91_PLATFORM_DRIVER); -#endif #ifdef EP93XX_PLATFORM_DRIVER platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); #endif