From patchwork Tue Oct 31 03:46:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manan Aurora X-Patchwork-Id: 13441003 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B4ACD5663 for ; Tue, 31 Oct 2023 03:46:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="fjOO6srO" Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D60AFE6 for ; Mon, 30 Oct 2023 20:46:48 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-d9cb4de3bf0so5419050276.0 for ; Mon, 30 Oct 2023 20:46:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1698724008; x=1699328808; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=XLDwkSvHH9wdnTtbtMwEJ+1MXhphfGEAd2XlaB9k1Nc=; b=fjOO6srOlaep4/iSPOs838d5D3tYwuJ8cjzhx9WKa/aQNxL/hVwuzFKGwjguKxk7uC +4JZatS1dqPAxmKvdEY/fh1g5JBm2OgNvSOqHOszkrOfIKa5+XbI50tHvCQao+n8xwbl oH8HBNmY9ZVjYtSVRjk9OyPWTu60yEZQ/2j698jg2ojP/BiqYYc4HwxXQ8nBdGgN01sx B3phBnL+GfHk6fmwygpvpiS95x/M1pHSLGM6yV+4p12Jtn1UsueD5Z+sYZCosBopGC29 qcVb2cugIsAzBGl2Nd5X3n/kgz19QuCq5YaeHsuJ+abFriXJW50zFJr6m4MDAblTrlQ2 WLyg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698724008; x=1699328808; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=XLDwkSvHH9wdnTtbtMwEJ+1MXhphfGEAd2XlaB9k1Nc=; b=DPKIgSXyGZCS4J40v3UJODQui8bAN+pM4eeClv/thER6VDOkrGJp3lYRTRv2tMae/e mbabqL6Fr6hIXd2bnFZ5ywq0YKDdeqHq6I5Hs0g/f9WXjQqeKmaLUD0Yok6k3yOieszr v7wZOGM/K2diiOerU/c92SOuaOhwP8afh79bd4h7iZEbM4qQxCn0EQkf+0hQUuguwMef x+RbiO+d0j1IPLEpXb4wU2yVL0+DctzHgvn2mq5vg2cjshC9KwuexVP/dOuWAD5S6cE2 2//mxQE0F3fFCPgxWVnbQOmDoe1VO5M7D3E7r59U1Y8XaosStEEz2I6KNTMW4SWC9E50 jDzg== X-Gm-Message-State: AOJu0YxKOdxVFY9ANBZzKVKHDL8hn5IB7QSLvSLr9av57aD2UczArxkS V8Zeb00r85F7Akcmk0g5HIR06/OqxCgO X-Google-Smtp-Source: AGHT+IF3tuZqB3jnScYggN4DVKsq1S9lGHS1D1+k8sI5gTcavbD4kXrSGzWArI8YRXyO8uCMehXkVW8twUo3 X-Received: from maurora-apa.c.googlers.com ([fda3:e722:ac3:cc00:3:22c1:c0a8:1184]) (user=maurora job=sendgmr) by 2002:a25:68cc:0:b0:da0:622b:553b with SMTP id d195-20020a2568cc000000b00da0622b553bmr206246ybc.12.1698724008159; Mon, 30 Oct 2023 20:46:48 -0700 (PDT) Date: Tue, 31 Oct 2023 03:46:41 +0000 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.42.0.820.g83a721a137-goog Message-ID: <20231031034641.660606-1-maurora@google.com> Subject: [PATCH] usb: dwc3: Support EBC feature of DWC_usb31 From: Manan Aurora To: Thinh Nguyen Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, manugautam@google.com, Manan Aurora Support configuration and use of bulk endpoints in the so-called EBC mode described in the DBC_usb31 databook (appendix E) Added a bit fifo_mode to usb_ep to indicate to the UDC driver that a specific endpoint is to operate in the EBC (or equivalent) mode when enabled Added macros for bits 15 and 14 of DEPCFG parameter 1 to indicate EBC mode and write back behaviour. These bits will be set to 1 when configuring an EBC endpoint as described in the programming guide Signed-off-by: Manan Aurora --- drivers/usb/dwc3/core.h | 1 + drivers/usb/dwc3/gadget.c | 6 ++++++ drivers/usb/dwc3/gadget.h | 2 ++ include/linux/usb/gadget.h | 1 + 4 files changed, 10 insertions(+) diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index efe6caf4d0e8..c5b578188cd3 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -374,6 +374,7 @@ /* Global HWPARAMS4 Register */ #define DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(n) (((n) & (0x0f << 13)) >> 13) #define DWC3_MAX_HIBER_SCRATCHBUFS 15 +#define DWC3_EXT_BUFF_CONTROL BIT(21) /* Global HWPARAMS6 Register */ #define DWC3_GHWPARAMS6_BCSUPPORT BIT(14) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 858fe4c299b7..47d2737d528b 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -673,6 +673,12 @@ static int dwc3_gadget_set_ep_config(struct dwc3_ep *dep, unsigned int action) params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(bInterval_m1); } + if (dep->endpoint.fifo_mode) { + if (!(dwc->hwparams.hwparams4 & DWC3_EXT_BUFF_CONTROL)) + return -EINVAL; + params.param1 |= DWC3_DEPCFG_EBC_HWO_NOWB | DWC3_DEPCFG_USE_EBC; + } + return dwc3_send_gadget_ep_cmd(dep, DWC3_DEPCMD_SETEPCONFIG, ¶ms); } diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h index 55a56cf67d73..fd7a4e94397e 100644 --- a/drivers/usb/dwc3/gadget.h +++ b/drivers/usb/dwc3/gadget.h @@ -26,6 +26,8 @@ struct dwc3; #define DWC3_DEPCFG_XFER_NOT_READY_EN BIT(10) #define DWC3_DEPCFG_FIFO_ERROR_EN BIT(11) #define DWC3_DEPCFG_STREAM_EVENT_EN BIT(13) +#define DWC3_DEPCFG_EBC_HWO_NOWB BIT(14) +#define DWC3_DEPCFG_USE_EBC BIT(15) #define DWC3_DEPCFG_BINTERVAL_M1(n) (((n) & 0xff) << 16) #define DWC3_DEPCFG_STREAM_CAPABLE BIT(24) #define DWC3_DEPCFG_EP_NUMBER(n) (((n) & 0x1f) << 25) diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 6532beb587b1..a771ccc038ac 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -236,6 +236,7 @@ struct usb_ep { unsigned max_streams:16; unsigned mult:2; unsigned maxburst:5; + unsigned fifo_mode:1; u8 address; const struct usb_endpoint_descriptor *desc; const struct usb_ss_ep_comp_descriptor *comp_desc;