Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752879AbcKRLSe (ORCPT ); Fri, 18 Nov 2016 06:18:34 -0500 Received: from mail-wm0-f68.google.com ([74.125.82.68]:36713 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752345AbcKRLSc (ORCPT ); Fri, 18 Nov 2016 06:18:32 -0500 From: Tal Shorer To: gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Tal Shorer Subject: [PATCH v2] usb: hcd.h: construct hub class request conastants from simpler constants Date: Fri, 18 Nov 2016 13:18:19 +0200 Message-Id: <1479467899-18330-1-git-send-email-tal.shorer@gmail.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <20161118100100.GA20048@kroah.com> References: <20161118100100.GA20048@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2720 Lines: 55 Currently, each hub class request constant is defined by a line like: The "magic" number for the high byte is one of 0x20, 0xa0, 0x23, 0xa3. The 0x80 bit that changes inditace USB_DIR_IN, and the 0x03 that pops up is the difference between USB_RECIP_DEVICE (0x00) and USB_RECIP_OTHER (0x03). The constant 0x20 bit is USB_TYPE_CLASS. This patch eliminates those magic numbers by defining a macro to help construct these hub class request from simpler constants. Note that USB_RT_HUB is defined as (USB_TYPE_CLASS | USB_RECIP_DEVICE) and that USB_RT_PORT is defined as (USB_TYPE_CLASS | USB_RECIP_OTHER). Signed-off-by: Tal Shorer --- include/linux/usb/hcd.h | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index 66fc137..76159fb 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -566,21 +566,22 @@ extern void usb_ep0_reinit(struct usb_device *); ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8) /* class requests from the USB 2.0 hub spec, table 11-15 */ +#define HUB_CLASS_REQ(dir, type, request) ((((dir) | (type)) << 8) | (request)) /* GetBusState and SetHubDescriptor are optional, omitted */ -#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE) -#define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE) -#define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR) -#define GetHubStatus (0xa000 | USB_REQ_GET_STATUS) -#define GetPortStatus (0xa300 | USB_REQ_GET_STATUS) -#define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE) -#define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE) +#define ClearHubFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, USB_REQ_CLEAR_FEATURE) +#define ClearPortFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, USB_REQ_CLEAR_FEATURE) +#define GetHubDescriptor HUB_CLASS_REQ(USB_DIR_IN, USB_RT_HUB, USB_REQ_GET_DESCRIPTOR) +#define GetHubStatus HUB_CLASS_REQ(USB_DIR_IN, USB_RT_HUB, USB_REQ_GET_STATUS) +#define GetPortStatus HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, USB_REQ_GET_STATUS) +#define SetHubFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, USB_REQ_SET_FEATURE) +#define SetPortFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, USB_REQ_SET_FEATURE) /*-------------------------------------------------------------------------*/ /* class requests from USB 3.1 hub spec, table 10-7 */ -#define SetHubDepth (0x2000 | HUB_SET_DEPTH) -#define GetPortErrorCount (0xa300 | HUB_GET_PORT_ERR_COUNT) +#define SetHubDepth HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, HUB_SET_DEPTH) +#define GetPortErrorCount HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, HUB_GET_PORT_ERR_COUNT) /* * Generic bandwidth allocation constants/support -- 2.5.0