From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9D867C433DF for ; Fri, 24 Jul 2020 23:39:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 72F5D206E3 for ; Fri, 24 Jul 2020 23:39:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=synopsys.com header.i=@synopsys.com header.b="k6AMjeso" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726639AbgGXXjc (ORCPT ); Fri, 24 Jul 2020 19:39:32 -0400 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:41888 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726592AbgGXXjb (ORCPT ); Fri, 24 Jul 2020 19:39:31 -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 E387EC0086; Fri, 24 Jul 2020 23:39:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1595633970; bh=rxqxrOtSEKkaYGCHbdsmdMiCN+d0UoTn0iORDokJxl4=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=k6AMjesoOUQgRaIP4rDzk9NW2DsAAvmZLvOEsHPwqvQ2nA2zSNfzcJbrh3tIrbVLc uVDDgJM9/J5MHIgjqBgFkdLsfQtPAiGJy8kGfVghPEuQnLgmKwDd4VcJQY8ZMavx/9 uL6M49FozJJpXl6HJIUxhac5WMi5EmKzz4aSv3B0T9/q7Znu1CwLmfXT62bxHLUs5Z +Kx8/2MNRRzpc1t8qHwHKh1yq1gHdq3c2jMv+YJzwujvH7HLp3bSKnwdDkc8Lbn0KB vckl+UASdbBw3GqSf29TjTD2NVlPiGtqJughCQD+MZNzbjs3+JGAPbXoSUad6BKMUZ /R7uaX4Dbn4zw== 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 B3895A0099; Fri, 24 Jul 2020 23:39:29 +0000 (UTC) Received: by te-lab16 (sSMTP sendmail emulation); Fri, 24 Jul 2020 16:39:29 -0700 Date: Fri, 24 Jul 2020 16:39:29 -0700 Message-Id: In-Reply-To: References: X-SNPS-Relay: synopsys.com From: Thinh Nguyen Subject: [PATCH v3 10/12] usb: dwc3: gadget: Implement setting of sublink speed To: Felipe Balbi , Greg Kroah-Hartman , Thinh Nguyen , linux-usb@vger.kernel.org Cc: John Youn Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Implement gadget ops udc_set_num_lanes_and_speed. This allows the gadget/core driver to select number of lanes to use and the sublink speed the controller supports. Signed-off-by: Thinh Nguyen --- Changes in v3: - None Changes in v2: - None drivers/usb/dwc3/core.h | 2 ++ drivers/usb/dwc3/gadget.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 65 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 0ec675327014..9466c4c36963 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -385,6 +385,8 @@ #define DWC3_GUCTL2_RST_ACTBITLATER BIT(14) /* Device Configuration Register */ +#define DWC3_DCFG_NUMLANES(n) (((n) & 0x3) << 30) /* DWC_usb32 only */ + #define DWC3_DCFG_DEVADDR(addr) ((addr) << 3) #define DWC3_DCFG_DEVADDR_MASK DWC3_DCFG_DEVADDR(0x7f) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 3038dae970f3..b7da4e1c81aa 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2333,6 +2333,62 @@ static void dwc3_gadget_set_speed(struct usb_gadget *g, spin_unlock_irqrestore(&dwc->lock, flags); } +static void dwc3_gadget_set_num_lanes_and_speed(struct usb_gadget *g, + unsigned int num_lanes, + unsigned int ssid) +{ + struct dwc3 *dwc = gadget_to_dwc(g); + struct usb_sublink_speed *ssa = NULL; + unsigned int lanes; + unsigned long flags; + u32 reg; + int i; + + spin_lock_irqsave(&dwc->lock, flags); + if (dwc->maximum_speed < USB_SPEED_SUPER_PLUS) + goto done; + + for (i = 0; i < g->ssac + 1; i++) { + if (g->sublink_speed[i].id == ssid) { + ssa = &g->sublink_speed[i]; + break; + } + } + + if (!ssa) { + dev_err(dwc->dev, "SSID not found (%d)\n", ssid); + goto done; + } + + reg = dwc3_readl(dwc->regs, DWC3_DCFG); + reg &= ~DWC3_DCFG_SPEED_MASK; + + switch (ssa->mantissa) { + case 5: + reg |= DWC3_DCFG_SUPERSPEED; + break; + case 10: + reg |= DWC3_DCFG_SUPERSPEED_PLUS; + break; + default: + dev_err(dwc->dev, "invalid lane speed mantissa (%d)\n", + ssa->mantissa); + goto done; + } + + /* Lane configuration is only available to DWC_usb32 */ + if (DWC3_IP_IS(DWC32)) { + lanes = clamp_t(unsigned int, num_lanes, 1, + dwc->maximum_num_lanes); + reg &= ~DWC3_DCFG_NUMLANES(~0); + reg |= DWC3_DCFG_NUMLANES(lanes - 1); + } + + dwc3_writel(dwc->regs, DWC3_DCFG, reg); +done: + spin_unlock_irqrestore(&dwc->lock, flags); +} + static const struct usb_gadget_ops dwc3_gadget_ops = { .get_frame = dwc3_gadget_get_frame, .wakeup = dwc3_gadget_wakeup, @@ -2341,6 +2397,7 @@ static const struct usb_gadget_ops dwc3_gadget_ops = { .udc_start = dwc3_gadget_start, .udc_stop = dwc3_gadget_stop, .udc_set_speed = dwc3_gadget_set_speed, + .udc_set_num_lanes_and_speed = dwc3_gadget_set_num_lanes_and_speed, .get_config_params = dwc3_gadget_config_params, }; @@ -3751,7 +3808,12 @@ int dwc3_gadget_init(struct dwc3 *dwc) goto err4; } - dwc3_gadget_set_speed(&dwc->gadget, dwc->maximum_speed); + if (DWC3_IP_IS(DWC32) && dwc->maximum_speed == USB_SPEED_SUPER_PLUS) + dwc3_gadget_set_num_lanes_and_speed(&dwc->gadget, + dwc->maximum_num_lanes, + dwc->gadget.max_speed_ssid); + else + dwc3_gadget_set_speed(&dwc->gadget, dwc->maximum_speed); return 0; -- 2.11.0