From patchwork Fri Oct 20 09:33:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luca Weiss X-Patchwork-Id: 13430410 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BE42AC004C0 for ; Fri, 20 Oct 2023 09:34:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376603AbjJTJeR (ORCPT ); Fri, 20 Oct 2023 05:34:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42666 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376854AbjJTJdq (ORCPT ); Fri, 20 Oct 2023 05:33:46 -0400 Received: from mail-ej1-x632.google.com (mail-ej1-x632.google.com [IPv6:2a00:1450:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8DA6919B3 for ; Fri, 20 Oct 2023 02:33:27 -0700 (PDT) Received: by mail-ej1-x632.google.com with SMTP id a640c23a62f3a-9c53e8b7cf4so92622166b.1 for ; Fri, 20 Oct 2023 02:33:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fairphone.com; s=fair; t=1697794403; x=1698399203; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=8HAqgphO8/nmhxveYYWq+PwS2fkw9vCkjtGCsYcP8DE=; b=FYeQJxToEaN56qaSjTi3xRkXXFxyQCFqoO9YHmFtdDCoeL1iwFeClkv8LCZPlFhEzQ Laj94aMaSp0ObpaFepN5IsHCkBJAlI0nxiUe62fgR/ahMYbMyT1ThaSnjKFtFPJrzjBE OaInWd+rCFYFqYGkoHNJ7QWmsR1x1Wgp1rVHZJa0vo9KemFrDJcx4jx1bAnIbd3dMAXH ekqHIp/GF/zWBeyvolfi2OK70RWRAtnSs/OWgvdAjLp54PlPuktGNmLoAAWNcVIQuHBO HlRwv3kfTSY7L/C4/iBbKoWKDAqBWySmUTSdK5KVyRTtZnNtG3bka/2Z+CRIm57pQ0vG HCIw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697794403; x=1698399203; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=8HAqgphO8/nmhxveYYWq+PwS2fkw9vCkjtGCsYcP8DE=; b=f4YOfoQC/FK6WD7fWwzlZWL03AcgejBJlVsDTLtceFDvr4t/goSvVaRaQP+BPoZV2U 8bOH9B7diShEdF1andaJrTIwI43C3RsN9yPpCtEQJFxjsQWKRiDZh/9YdF33SkSF3hbL IDV+nKcMsJBP81ZWv5V2XXfAe2F3oOggdBLD7/yht/Y5qXPfb9GxWb9poFuwJRRswQMQ 0gscuGyDCo72gFkq30AgAMBTiW5tfwPwbmQC56dscHM/RDyU121GkT/b4HKcZyGFeQhN MYSyoReb0Fp2aqnSe8/Hro7r7LQt1skiNexYXw5hao/Oo/ZqkRvZ0sFr3LoA5h8yZ/QQ H6Lw== X-Gm-Message-State: AOJu0YyiuQtLNOVn9e9yX36k2y3VUtpoiAYm4hFIp+X66BlRzJc4+JvL +LVP3FOUyqOVy5mpWy9aLPPKZw== X-Google-Smtp-Source: AGHT+IFP1JXUdkDGNVp03jbl+ZSC03News4HiarnwyTD2JABp9j7F8z4tTvDzgffGBOsPBTwQNK6FA== X-Received: by 2002:a17:907:9724:b0:9bd:f3b0:c087 with SMTP id jg36-20020a170907972400b009bdf3b0c087mr922647ejc.2.1697794403304; Fri, 20 Oct 2023 02:33:23 -0700 (PDT) Received: from otso.luca.vpn.lucaweiss.eu (k10064.upc-k.chello.nl. [62.108.10.64]) by smtp.gmail.com with ESMTPSA id t15-20020a1709066bcf00b009a13fdc139fsm1102535ejs.183.2023.10.20.02.33.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Oct 2023 02:33:22 -0700 (PDT) From: Luca Weiss Date: Fri, 20 Oct 2023 11:33:19 +0200 Subject: [PATCH v2 2/3] usb: typec: fsa4480: Add support to swap SBU orientation MIME-Version: 1.0 Message-Id: <20231020-fsa4480-swap-v2-2-9a7f9bb59873@fairphone.com> References: <20231020-fsa4480-swap-v2-0-9a7f9bb59873@fairphone.com> In-Reply-To: <20231020-fsa4480-swap-v2-0-9a7f9bb59873@fairphone.com> To: Heikki Krogerus , Greg Kroah-Hartman , Neil Armstrong , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson Cc: ~postmarketos/upstreaming@lists.sr.ht, phone-devel@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, Luca Weiss X-Mailer: b4 0.12.3 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On some hardware designs the AUX+/- lanes are connected reversed to SBU1/2 compared to the expected design by FSA4480. Made more complicated, the otherwise compatible Orient-Chip OCP96011 expects the lanes to be connected reversed compared to FSA4480. * FSA4480 block diagram shows AUX+ connected to SBU2 and AUX- to SBU1. * OCP96011 block diagram shows AUX+ connected to SBU1 and AUX- to SBU2. So if OCP96011 is used as drop-in for FSA4480 then the orientation handling in the driver needs to be reversed to match the expectation of the OCP96011 hardware. Support parsing the data-lanes parameter in the endpoint node to swap this in the driver. The parse_data_lanes_mapping function is mostly taken from nb7vpq904m.c. Reviewed-by: Neil Armstrong Signed-off-by: Luca Weiss Reviewed-by: Heikki Krogerus --- drivers/usb/typec/mux/fsa4480.c | 71 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) diff --git a/drivers/usb/typec/mux/fsa4480.c b/drivers/usb/typec/mux/fsa4480.c index e0ee1f621abb..cb7cdf90cb0a 100644 --- a/drivers/usb/typec/mux/fsa4480.c +++ b/drivers/usb/typec/mux/fsa4480.c @@ -60,6 +60,7 @@ struct fsa4480 { unsigned int svid; u8 cur_enable; + bool swap_sbu_lanes; }; static const struct regmap_config fsa4480_regmap_config = { @@ -76,6 +77,9 @@ static int fsa4480_set(struct fsa4480 *fsa) u8 enable = FSA4480_ENABLE_DEVICE; u8 sel = 0; + if (fsa->swap_sbu_lanes) + reverse = !reverse; + /* USB Mode */ if (fsa->mode < TYPEC_STATE_MODAL || (!fsa->svid && (fsa->mode == TYPEC_MODE_USB2 || @@ -179,12 +183,75 @@ static int fsa4480_mux_set(struct typec_mux_dev *mux, struct typec_mux_state *st return ret; } +enum { + NORMAL_LANE_MAPPING, + INVERT_LANE_MAPPING, +}; + +#define DATA_LANES_COUNT 2 + +static const int supported_data_lane_mapping[][DATA_LANES_COUNT] = { + [NORMAL_LANE_MAPPING] = { 0, 1 }, + [INVERT_LANE_MAPPING] = { 1, 0 }, +}; + +static int fsa4480_parse_data_lanes_mapping(struct fsa4480 *fsa) +{ + struct fwnode_handle *ep; + u32 data_lanes[DATA_LANES_COUNT]; + int ret, i, j; + + ep = fwnode_graph_get_next_endpoint(dev_fwnode(&fsa->client->dev), NULL); + if (!ep) + return 0; + + ret = fwnode_property_read_u32_array(ep, "data-lanes", data_lanes, DATA_LANES_COUNT); + if (ret == -EINVAL) + /* Property isn't here, consider default mapping */ + goto out_done; + if (ret) { + dev_err(&fsa->client->dev, "invalid data-lanes property: %d\n", ret); + goto out_error; + } + + for (i = 0; i < ARRAY_SIZE(supported_data_lane_mapping); i++) { + for (j = 0; j < DATA_LANES_COUNT; j++) { + if (data_lanes[j] != supported_data_lane_mapping[i][j]) + break; + } + + if (j == DATA_LANES_COUNT) + break; + } + + switch (i) { + case NORMAL_LANE_MAPPING: + break; + case INVERT_LANE_MAPPING: + fsa->swap_sbu_lanes = true; + break; + default: + dev_err(&fsa->client->dev, "invalid data-lanes mapping\n"); + ret = -EINVAL; + goto out_error; + } + +out_done: + ret = 0; + +out_error: + fwnode_handle_put(ep); + + return ret; +} + static int fsa4480_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct typec_switch_desc sw_desc = { }; struct typec_mux_desc mux_desc = { }; struct fsa4480 *fsa; + int ret; fsa = devm_kzalloc(dev, sizeof(*fsa), GFP_KERNEL); if (!fsa) @@ -193,6 +260,10 @@ static int fsa4480_probe(struct i2c_client *client) fsa->client = client; mutex_init(&fsa->lock); + ret = fsa4480_parse_data_lanes_mapping(fsa); + if (ret) + return ret; + fsa->regmap = devm_regmap_init_i2c(client, &fsa4480_regmap_config); if (IS_ERR(fsa->regmap)) return dev_err_probe(dev, PTR_ERR(fsa->regmap), "failed to initialize regmap\n");