From patchwork Sun Jul 26 01:36:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thinh Nguyen X-Patchwork-Id: 11685415 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 E8B09912 for ; Sun, 26 Jul 2020 01:36:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D02AA2070E for ; Sun, 26 Jul 2020 01:36:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=synopsys.com header.i=@synopsys.com header.b="YNc25dgN" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728120AbgGZBg6 (ORCPT ); Sat, 25 Jul 2020 21:36:58 -0400 Received: from smtprelay-out1.synopsys.com ([149.117.73.133]:50708 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726870AbgGZBg6 (ORCPT ); Sat, 25 Jul 2020 21:36:58 -0400 Received: from mailhost.synopsys.com (sv1-mailhost2.synopsys.com [10.205.2.132]) (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 AB4D440141; Sun, 26 Jul 2020 01:36:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1595727417; bh=KohcknH3N7ogclOpTno5QaJ2O06Q/SO6YoOyDi+16W4=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=YNc25dgN7q5QGPonzTFnDd9MuVp41fV/LgNzTZK6sNaQAkbcUBNmcRq+B8BoDx5E/ 2H+eSZF0TWxoDTbcCRHG6EPzrVUVSc/VjIRDr/Mi45q8ZeETNulodiJuK9iQYwfmub yM0Yq7n0Gv4vT+suNWhtsVHIXYZp3XgWIgMNJVIFaZWsm++doWHqVlz0tgpRpQnyXP /bM2Q0tfnJuIDTk0eUFriSMDh+d7NLrplRrVR3kwT40+r+1iQ4DTmi70Ac7wc8Zcz7 8GqpmE4VR/+C9m45HslMMFxKexyCAo/JADkaq/ZxT9zes/aONS/BcDt6VX+A99lqe+ Ft4mO01aBwlfQ== 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 71B22A006F; Sun, 26 Jul 2020 01:36:56 +0000 (UTC) Received: by te-lab16 (sSMTP sendmail emulation); Sat, 25 Jul 2020 18:36:56 -0700 Date: Sat, 25 Jul 2020 18:36:56 -0700 Message-Id: In-Reply-To: References: X-SNPS-Relay: synopsys.com From: Thinh Nguyen Subject: [PATCH v4 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 v4: - None 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;