From patchwork Fri Sep 25 02:42:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thinh Nguyen X-Patchwork-Id: 11798699 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1ACB0618 for ; Fri, 25 Sep 2020 02:42:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F0E5720888 for ; Fri, 25 Sep 2020 02:42:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=synopsys.com header.i=@synopsys.com header.b="Ch/ZbjYx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727046AbgIYCmk (ORCPT ); Thu, 24 Sep 2020 22:42:40 -0400 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:49610 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726764AbgIYCmk (ORCPT ); Thu, 24 Sep 2020 22:42:40 -0400 Received: from mailhost.synopsys.com (sv2-mailhost2.synopsys.com [10.205.2.134]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id BE330C0A93; Fri, 25 Sep 2020 02:42:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1601001759; bh=0ldPI2+q7Mni43Qe9GTShZz12zaLHpc0anQqI/M/3qA=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=Ch/ZbjYxRn3iKQGTeD27ZZ+vf7Eg0XZBKYnCXPLzNdwdQTVuEs5Yf7G5Av8PxQOBw X09gmfbJdnND1oOIwuCiYxBROkdKzP6a0XCHVzyj78JFMP3EL+Bq5RTXAxC/WRXsAR gzTKTmKy/1mbK669rd5jQvnis1diGxs3sqs0Tq7bnsu77EN8I2taKsDuIroS2RhBH3 WvpY7I8/Re+zshmZSETeCgxWAelnzuVYs9RrGcahCOwaArGKZCgN4eC5vIP5M/Ub44 Ao5Icn9vJBOm1JVrdV4YX0bIHSFt+306/WG03HBCOu1Q2z5Z6OvoYXwkz4nfuv7olG lfwWHli9MAUeQ== Received: from te-lab16 (nanobot.internal.synopsys.com [10.10.186.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailhost.synopsys.com (Postfix) with ESMTPSA id 8F7E0A0099; Fri, 25 Sep 2020 02:42:38 +0000 (UTC) Received: by te-lab16 (sSMTP sendmail emulation); Thu, 24 Sep 2020 19:42:38 -0700 Date: Thu, 24 Sep 2020 19:42:38 -0700 Message-Id: In-Reply-To: References: X-SNPS-Relay: synopsys.com From: Thinh Nguyen Subject: [PATCH v5 09/12] usb: dwc3: gadget: Report sublink speed capability To: Felipe Balbi , Greg Kroah-Hartman , Thinh.Nguyen@synopsys.com, linux-usb@vger.kernel.org Cc: John Youn Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Report the sublink speed attributes to the usb_gadget structure based on the HW capability from the device maximum_speed property. Only DWC_usb32 supports 2 sublink speeds if it can operate with 2 lanes. (i.e. at SSP, it can operate as gen1x2) Note: the SSID DWC3_SSP_SSID_GEN2 and DWC3_SSP_SSID_GEN1 are arbitrary. There's no standard according to the USB 3.2 spec as long as they are unique and within 0-15. Signed-off-by: Thinh Nguyen --- Changes in v5: - Rebase on Felipe's testing/next branch - Changed Signed-off-by email to match From: email header Changes in v4: - None Changes in v3: - Update commit with updated field name - No longer use DWC3_LSM_5/10_GBPS macros Changes in v2: - Fix missing check for gen1x2 when writing to sublink speed attributes - Minor fix in commit message (first commit sentence ended with comma) drivers/usb/dwc3/core.h | 4 ++++ drivers/usb/dwc3/gadget.c | 49 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+) diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 585a83ada270..c4a33545530d 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -40,6 +40,10 @@ #define DWC3_XHCI_RESOURCES_NUM 2 #define DWC3_ISOC_MAX_RETRIES 5 +/* Sublink Speed Attribute ID */ +#define DWC3_SSP_SSID_GEN2 2 +#define DWC3_SSP_SSID_GEN1 1 + #define DWC3_SCRATCHBUF_SIZE 4096 /* each buffer is assumed to be 4KiB */ #define DWC3_EVENT_BUFFERS_SIZE 4096 #define DWC3_EVENT_TYPE_MASK 0xfe diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 82bc075ba97c..e60161205bf9 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -3779,6 +3779,55 @@ int dwc3_gadget_init(struct dwc3 *dwc) dwc->revision); dwc->gadget->max_speed = dwc->maximum_speed; + dwc->gadget->max_num_lanes = dwc->maximum_num_lanes; + + if (dwc->maximum_speed == USB_SPEED_SUPER_PLUS) { + struct usb_sublink_speed *ssa; + int i; + + /* + * Multiple sublink speeds are only available to DWC_usb32 + * devices that can operate at gen2x2 max. + */ + if (dwc->maximum_phy_gen == USB_PHY_GEN_2 && + dwc->maximum_num_lanes == 2) { + dwc->gadget->ssac = 3; + dwc->gadget->min_speed_ssid = DWC3_SSP_SSID_GEN1; + dwc->gadget->max_speed_ssid = DWC3_SSP_SSID_GEN2; + } else if (dwc->maximum_phy_gen == USB_PHY_GEN_1 && + dwc->maximum_num_lanes == 2) { + dwc->gadget->ssac = 1; + dwc->gadget->min_speed_ssid = DWC3_SSP_SSID_GEN1; + dwc->gadget->max_speed_ssid = DWC3_SSP_SSID_GEN1; + } else { + dwc->gadget->ssac = 1; + dwc->gadget->min_speed_ssid = DWC3_SSP_SSID_GEN2; + dwc->gadget->max_speed_ssid = DWC3_SSP_SSID_GEN2; + } + + for (i = 0; i < dwc->gadget->ssac + 1; i++) { + ssa = &dwc->gadget->sublink_speed[i]; + + if (dwc->gadget->ssac > 1 && i > 1) + ssa->id = dwc->gadget->max_speed_ssid; + else + ssa->id = dwc->gadget->min_speed_ssid; + + if (ssa->id == DWC3_SSP_SSID_GEN1) + ssa->mantissa = 5; + else + ssa->mantissa = 10; + + /* First attribute is RX followed by TX */ + if (i % 2) + ssa->type = USB_ST_SYMMETRIC_TX; + else + ssa->type = USB_ST_SYMMETRIC_RX; + + ssa->exponent = USB_LSE_GBPS; + ssa->protocol = USB_LP_SSP; + } + } /* * REVISIT: Here we should clear all pending IRQs to be