From patchwork Thu Mar 3 22:33:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 547873 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 34645C433F5 for ; Thu, 3 Mar 2022 22:32:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236934AbiCCWcv (ORCPT ); Thu, 3 Mar 2022 17:32:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236927AbiCCWct (ORCPT ); Thu, 3 Mar 2022 17:32:49 -0500 Received: from mail-oi1-x230.google.com (mail-oi1-x230.google.com [IPv6:2607:f8b0:4864:20::230]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17B2614FFF2 for ; Thu, 3 Mar 2022 14:32:03 -0800 (PST) Received: by mail-oi1-x230.google.com with SMTP id j2so6196440oie.7 for ; Thu, 03 Mar 2022 14:32:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=X9JV+NV8hUdIRYanc1M81YurPWGieX1bhPcntTov4JQ=; b=c1kUcex8F+vJCxoKxNHDMtjxEQfmTnbQbbD1n1WPDnHEF5FnFi6Q6xhiU0gtNrvDiI GJyfnMZNzfhDVGA5cPVtOifgfe31tg08XGCP2javdtE8eVgWj60JNpHOJv2WdlF5zLUa 9IwTDPSFZFE+SGnsy9+6To5tSpMrL1H1WigpRs7PSlvcrzOKA6XElrjabd2r7ZYAtsFC pipuhGugBLIaVg5bronMYFQFdLQtv58iTT6FmZt6V6mdCuA+QgxUfkeFzJvpsglW9RFG fJ4jvodZfR69AcC8iCiAvH0zUVoBvCkWxxJ1IlVBCRqrjIcL72jxaZf7gTDk6O03Rx/S iVqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=X9JV+NV8hUdIRYanc1M81YurPWGieX1bhPcntTov4JQ=; b=F32bdBThmix/853aApvB5iJg3YGERbH38zusHyVKxIsP6EFEuIZU3xfKu+2O9KlYO6 O46uWav95ymO3mF0oHazKGgziux6CrAJLYXYE8IfBT0nESDgcVwjwZWZO7qwzjlTeNnd 0iKExwp0HTFxovaX0cDndmhywGaF4czHRoLxfo/wbH+u1MeVZ9VZx9uqef0f1RwzqUVG tXw+o9jWLWxdYSb9FKiePazPtohMPP/ca//YH6JPYdEey5415ZewCiZTeyAQt29S7BNk W8e5sNUDrZiQWLayrC4HNIJ/ScJQoqcxRm4DxiRYB7maWAAj+q8OgfiUFNE8cnbXG+2M AgaQ== X-Gm-Message-State: AOAM532DX5dqSaZZaFDNSKjOJ6I+LAnbh57lIvReeM4QpH1mJqrdtNiW HoveKerwhsXCVAREX1/fvR2LHw== X-Google-Smtp-Source: ABdhPJzL3GC3wuYi5UpGljLYoJiWtR+9mxBdEmFbSxDUE6Mf39bmn8ivY5qiDQNoaV8V2Rgdux3Xfw== X-Received: by 2002:a05:6808:2022:b0:2d4:752b:dfb5 with SMTP id q34-20020a056808202200b002d4752bdfb5mr6712133oiw.174.1646346722312; Thu, 03 Mar 2022 14:32:02 -0800 (PST) Received: from ripper.. ([2600:1700:a0:3dc8:205:1bff:fec0:b9b3]) by smtp.gmail.com with ESMTPSA id fq14-20020a0568710b0e00b000d4492531a2sm1764777oab.17.2022.03.03.14.32.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Mar 2022 14:32:01 -0800 (PST) From: Bjorn Andersson To: Rob Herring , Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus , "Rafael J. Wysocki" , Hans de Goede Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Dmitry Baryshkov Subject: [PATCH v3 2/6] device property: Use multi-connection matchers for single case Date: Thu, 3 Mar 2022 14:33:47 -0800 Message-Id: <20220303223351.141238-2-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20220303223351.141238-1-bjorn.andersson@linaro.org> References: <20220303223351.141238-1-bjorn.andersson@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org The newly introduced helpers for searching for matches in the case of multiple connections can be resused by the single-connection case, so do this to save some duplication. Signed-off-by: Bjorn Andersson --- Changes since v2: - None Changes since v1: - None drivers/base/property.c | 55 ++++------------------------------------- 1 file changed, 5 insertions(+), 50 deletions(-) diff --git a/drivers/base/property.c b/drivers/base/property.c index 5cda205136f6..81156dc97ad7 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1193,31 +1193,6 @@ const void *device_get_match_data(struct device *dev) } EXPORT_SYMBOL_GPL(device_get_match_data); -static void * -fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id, - void *data, devcon_match_fn_t match) -{ - struct fwnode_handle *node; - struct fwnode_handle *ep; - void *ret; - - fwnode_graph_for_each_endpoint(fwnode, ep) { - node = fwnode_graph_get_remote_port_parent(ep); - if (!fwnode_device_is_available(node)) { - fwnode_handle_put(node); - continue; - } - - ret = match(node, con_id, data); - fwnode_handle_put(node); - if (ret) { - fwnode_handle_put(ep); - return ret; - } - } - return NULL; -} - static unsigned int fwnode_graph_devcon_matches(struct fwnode_handle *fwnode, const char *con_id, void *data, devcon_match_fn_t match, @@ -1252,28 +1227,6 @@ static unsigned int fwnode_graph_devcon_matches(struct fwnode_handle *fwnode, return count; } -static void * -fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id, - void *data, devcon_match_fn_t match) -{ - struct fwnode_handle *node; - void *ret; - int i; - - for (i = 0; ; i++) { - node = fwnode_find_reference(fwnode, con_id, i); - if (IS_ERR(node)) - break; - - ret = match(node, NULL, data); - fwnode_handle_put(node); - if (ret) - return ret; - } - - return NULL; -} - static unsigned int fwnode_devcon_matches(struct fwnode_handle *fwnode, const char *con_id, void *data, devcon_match_fn_t match, @@ -1320,16 +1273,18 @@ void *fwnode_connection_find_match(struct fwnode_handle *fwnode, const char *con_id, void *data, devcon_match_fn_t match) { + unsigned int count; void *ret; if (!fwnode || !match) return NULL; - ret = fwnode_graph_devcon_match(fwnode, con_id, data, match); - if (ret) + count = fwnode_graph_devcon_matches(fwnode, con_id, data, match, &ret, 1); + if (count) return ret; - return fwnode_devcon_match(fwnode, con_id, data, match); + count = fwnode_devcon_matches(fwnode, con_id, data, match, &ret, 1); + return count ? ret : NULL; } EXPORT_SYMBOL_GPL(fwnode_connection_find_match); From patchwork Thu Mar 3 22:33:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 547872 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 C3356C433FE for ; Thu, 3 Mar 2022 22:32:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236964AbiCCWdA (ORCPT ); Thu, 3 Mar 2022 17:33:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53802 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236932AbiCCWcy (ORCPT ); Thu, 3 Mar 2022 17:32:54 -0500 Received: from mail-oi1-x22f.google.com (mail-oi1-x22f.google.com [IPv6:2607:f8b0:4864:20::22f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8A97B14FFF0 for ; Thu, 3 Mar 2022 14:32:07 -0800 (PST) Received: by mail-oi1-x22f.google.com with SMTP id l25so6159662oic.13 for ; Thu, 03 Mar 2022 14:32:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=1EyMZD3c/zIXsNVVHj1OKSD/HT/7oGKTphYrrLv5168=; b=oKc4oqU8nDy2TFCgnyBWJMqCo1SsOqWK9WQ8aBRmjcKdWhGfm9zGlPdtca5IuKxTqj fJ8YoWzd4HO7UiPynPE0Rxdg6xhLuniDS2TJc4YAVfcpysIK1xAHmR9ewzWHHLIUraOQ N66QQbnAbBn9s/qLP2/tj+X9y2iXLvogDwzt5Olxs/x3rGc/00ubnxc28WU8O8jCY+Rv mJgVk3Ocs0nHxxRxPN8WMgyrYEmJL3YkPmLL34Nu0a481HfTstLAfKdSlke2p6U/krGn KXNGmqFhpML53uMyFtM+pPpTu8fp2HvJwFiAjUP2KKH2l5zQ3DX8ktih+vI6AHVqcyhw +2xA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=1EyMZD3c/zIXsNVVHj1OKSD/HT/7oGKTphYrrLv5168=; b=S6JvI5bWHGkCOsI4TqxC82m7qWOEnMG1cSrwsgWutFHrmTDKuz8iQBDgtwT3/2y24d Ya8k+182My3ZJSPT/3rgparccyt1V2/Qpi/9b0WGnXSZLI7Z5cYmzFxISrpv01zl18Qv HN2KgPpHAwrvP0HYBxtxqa8ulV8CTOUuIr6q/a0Tb/tPaL/45SaniIBknHC4FHZi65M8 Wh3dzhtKtJL9HZnZHxzRtPuxpwC4TElLQnNkHRKMEA/NvSiUHBy54u8zyWGzPnJYHVQM fobldRCNhpKx/5P2xUHRdvdpjt7NGFVYR/USj7OgWKvGrnpvqFiDyiPbaV18VveMaDWt UnOA== X-Gm-Message-State: AOAM532Ct9RkK7LC0mTwqk2O/cB+6kEvjroyoMOe9mQhsyPWsclViKsA U9jKucoMjCFHZpxmk4+4tRy3rLX9RJX2Xw== X-Google-Smtp-Source: ABdhPJwiGWJlSF9hF/8/sULjrKbSMeUf1/DIOzRH1uxY8zKGPp2SKf1nmJKlAhhfKzPMbXrYflMjMQ== X-Received: by 2002:a05:6808:1599:b0:2d4:6846:f0ad with SMTP id t25-20020a056808159900b002d46846f0admr6719328oiw.72.1646346726911; Thu, 03 Mar 2022 14:32:06 -0800 (PST) Received: from ripper.. ([2600:1700:a0:3dc8:205:1bff:fec0:b9b3]) by smtp.gmail.com with ESMTPSA id fq14-20020a0568710b0e00b000d4492531a2sm1764777oab.17.2022.03.03.14.32.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Mar 2022 14:32:06 -0800 (PST) From: Bjorn Andersson To: Rob Herring , Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus , "Rafael J. Wysocki" , Hans de Goede Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Dmitry Baryshkov Subject: [PATCH v3 4/6] typec: mux: Allow multiple mux_devs per mux Date: Thu, 3 Mar 2022 14:33:49 -0800 Message-Id: <20220303223351.141238-4-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20220303223351.141238-1-bjorn.andersson@linaro.org> References: <20220303223351.141238-1-bjorn.andersson@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org In the Qualcomm platforms the USB/DP PHY handles muxing and orientation switching of the SuperSpeed lines, but the SBU lines needs to be connected and switched by external (to the SoC) hardware. It's therefor necessary to be able to have the TypeC controller operate multiple TypeC muxes and switches. Use the newly introduced indirection object to handle this, to avoid having to taint the TypeC controllers with knowledge about the downstream hardware configuration. The max number of devs per indirection is set to 3, which account for being able to mux/switch the USB HS, SS and SBU lines, as per defined defined in the usb-c-connector binding. This number could be grown if need arrises at a later point in time. Acked-by: Heikki Krogerus Signed-off-by: Bjorn Andersson --- Changes since v2: - Picked up Heikki's ack. Changes since v1: - Improved the motivation for the 3 in the commit message. - kfree sw and mux in error paths drivers/usb/typec/mux.c | 128 ++++++++++++++++++++++++++++++++-------- 1 file changed, 102 insertions(+), 26 deletions(-) diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c index d0b42c297aca..cf2347dd1663 100644 --- a/drivers/usb/typec/mux.c +++ b/drivers/usb/typec/mux.c @@ -17,8 +17,11 @@ #include "class.h" #include "mux.h" +#define TYPEC_MUX_MAX_DEVS 3 + struct typec_switch { - struct typec_switch_dev *sw_dev; + struct typec_switch_dev *sw_devs[TYPEC_MUX_MAX_DEVS]; + unsigned int num_sw_devs; }; static int switch_fwnode_match(struct device *dev, const void *fwnode) @@ -67,25 +70,50 @@ static void *typec_switch_match(struct fwnode_handle *fwnode, const char *id, */ struct typec_switch *fwnode_typec_switch_get(struct fwnode_handle *fwnode) { - struct typec_switch_dev *sw_dev; + struct typec_switch_dev *sw_devs[TYPEC_MUX_MAX_DEVS]; struct typec_switch *sw; + int count; + int err; + int i; sw = kzalloc(sizeof(*sw), GFP_KERNEL); if (!sw) return ERR_PTR(-ENOMEM); - sw_dev = fwnode_connection_find_match(fwnode, "orientation-switch", NULL, - typec_switch_match); - if (IS_ERR_OR_NULL(sw_dev)) { + count = fwnode_connection_find_matches(fwnode, "orientation-switch", NULL, + typec_switch_match, + (void **)sw_devs, + ARRAY_SIZE(sw_devs)); + if (count <= 0) { kfree(sw); - return ERR_CAST(sw_dev); + return NULL; } - WARN_ON(!try_module_get(sw_dev->dev.parent->driver->owner)); + for (i = 0; i < count; i++) { + if (IS_ERR(sw_devs[i])) { + err = PTR_ERR(sw_devs[i]); + goto put_sw_devs; + } + } - sw->sw_dev = sw_dev; + for (i = 0; i < count; i++) { + WARN_ON(!try_module_get(sw_devs[i]->dev.parent->driver->owner)); + sw->sw_devs[i] = sw_devs[i]; + } + + sw->num_sw_devs = count; return sw; + +put_sw_devs: + for (i = 0; i < count; i++) { + if (!IS_ERR(sw_devs[i])) + put_device(&sw_devs[i]->dev); + } + + kfree(sw); + + return ERR_PTR(err); } EXPORT_SYMBOL_GPL(fwnode_typec_switch_get); @@ -98,14 +126,17 @@ EXPORT_SYMBOL_GPL(fwnode_typec_switch_get); void typec_switch_put(struct typec_switch *sw) { struct typec_switch_dev *sw_dev; + unsigned int i; if (IS_ERR_OR_NULL(sw)) return; - sw_dev = sw->sw_dev; + for (i = 0; i < sw->num_sw_devs; i++) { + sw_dev = sw->sw_devs[i]; - module_put(sw_dev->dev.parent->driver->owner); - put_device(&sw_dev->dev); + module_put(sw_dev->dev.parent->driver->owner); + put_device(&sw_dev->dev); + } kfree(sw); } EXPORT_SYMBOL_GPL(typec_switch_put); @@ -170,13 +201,21 @@ int typec_switch_set(struct typec_switch *sw, enum typec_orientation orientation) { struct typec_switch_dev *sw_dev; + unsigned int i; + int ret; if (IS_ERR_OR_NULL(sw)) return 0; - sw_dev = sw->sw_dev; + for (i = 0; i < sw->num_sw_devs; i++) { + sw_dev = sw->sw_devs[i]; + + ret = sw_dev->set(sw_dev, orientation); + if (ret) + return ret; + } - return sw_dev->set(sw_dev, orientation); + return 0; } EXPORT_SYMBOL_GPL(typec_switch_set); @@ -208,7 +247,8 @@ EXPORT_SYMBOL_GPL(typec_switch_get_drvdata); /* ------------------------------------------------------------------------- */ struct typec_mux { - struct typec_mux_dev *mux_dev; + struct typec_mux_dev *mux_devs[TYPEC_MUX_MAX_DEVS]; + unsigned int num_mux_devs; }; static int mux_fwnode_match(struct device *dev, const void *fwnode) @@ -291,25 +331,50 @@ static void *typec_mux_match(struct fwnode_handle *fwnode, const char *id, struct typec_mux *fwnode_typec_mux_get(struct fwnode_handle *fwnode, const struct typec_altmode_desc *desc) { - struct typec_mux_dev *mux_dev; + struct typec_mux_dev *mux_devs[TYPEC_MUX_MAX_DEVS]; struct typec_mux *mux; + int count; + int err; + int i; mux = kzalloc(sizeof(*mux), GFP_KERNEL); if (!mux) return ERR_PTR(-ENOMEM); - mux_dev = fwnode_connection_find_match(fwnode, "mode-switch", (void *)desc, - typec_mux_match); - if (IS_ERR_OR_NULL(mux_dev)) { + count = fwnode_connection_find_matches(fwnode, "mode-switch", + (void *)desc, typec_mux_match, + (void **)mux_devs, + ARRAY_SIZE(mux_devs)); + if (count <= 0) { kfree(mux); - return ERR_CAST(mux_dev); + return NULL; } - WARN_ON(!try_module_get(mux_dev->dev.parent->driver->owner)); + for (i = 0; i < count; i++) { + if (IS_ERR(mux_devs[i])) { + err = PTR_ERR(mux_devs[i]); + goto put_mux_devs; + } + } + + for (i = 0; i < count; i++) { + WARN_ON(!try_module_get(mux_devs[i]->dev.parent->driver->owner)); + mux->mux_devs[i] = mux_devs[i]; + } - mux->mux_dev = mux_dev; + mux->num_mux_devs = count; return mux; + +put_mux_devs: + for (i = 0; i < count; i++) { + if (!IS_ERR(mux_devs[i])) + put_device(&mux_devs[i]->dev); + } + + kfree(mux); + + return ERR_PTR(err); } EXPORT_SYMBOL_GPL(fwnode_typec_mux_get); @@ -322,13 +387,16 @@ EXPORT_SYMBOL_GPL(fwnode_typec_mux_get); void typec_mux_put(struct typec_mux *mux) { struct typec_mux_dev *mux_dev; + unsigned int i; if (IS_ERR_OR_NULL(mux)) return; - mux_dev = mux->mux_dev; - module_put(mux_dev->dev.parent->driver->owner); - put_device(&mux_dev->dev); + for (i = 0; i < mux->num_mux_devs; i++) { + mux_dev = mux->mux_devs[i]; + module_put(mux_dev->dev.parent->driver->owner); + put_device(&mux_dev->dev); + } kfree(mux); } EXPORT_SYMBOL_GPL(typec_mux_put); @@ -336,13 +404,21 @@ EXPORT_SYMBOL_GPL(typec_mux_put); int typec_mux_set(struct typec_mux *mux, struct typec_mux_state *state) { struct typec_mux_dev *mux_dev; + unsigned int i; + int ret; if (IS_ERR_OR_NULL(mux)) return 0; - mux_dev = mux->mux_dev; + for (i = 0; i < mux->num_mux_devs; i++) { + mux_dev = mux->mux_devs[i]; + + ret = mux_dev->set(mux_dev, state); + if (ret) + return ret; + } - return mux_dev->set(mux_dev, state); + return 0; } EXPORT_SYMBOL_GPL(typec_mux_set); From patchwork Thu Mar 3 22:33:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 547871 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 9A84EC4167E for ; Thu, 3 Mar 2022 22:32:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236978AbiCCWdD (ORCPT ); Thu, 3 Mar 2022 17:33:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236956AbiCCWdA (ORCPT ); Thu, 3 Mar 2022 17:33:00 -0500 Received: from mail-oo1-xc36.google.com (mail-oo1-xc36.google.com [IPv6:2607:f8b0:4864:20::c36]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8199216FDCD for ; Thu, 3 Mar 2022 14:32:09 -0800 (PST) Received: by mail-oo1-xc36.google.com with SMTP id k13-20020a4a948d000000b003172f2f6bdfso7456985ooi.1 for ; Thu, 03 Mar 2022 14:32:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=+R4gZe/sViDjSJ+/IN1mjgukCy6kR0HogPt9Jm3IoDU=; b=m41/YCDu4L1SBTcOQDy570DhXn5I1jFuozqoFT6QjDA0jxDdoYzKrZxlRvhHgz+U2g j+G/4jARVNGdXh04oPNyRW1+6YrdukK3/KdPZ605veLtYb8pe7WEsJUcCI1AN+cqsFJX yw7Umshxoiv2Z2yxw7JxiUybF7o4C8Puudes0LvCM3rmhUDAlbU6DnX2xxISuRRWn1r9 lw6v0HnG/a6j+aYRhWpHd4p1rEDWVxxG4v5Unt7sYwVMO1jIEInWkLREsDUrK/wLLVDK DWoRnmHSRLAiNou6HM61pPCuX9AZdeEPgEzaCDCFAAUI9iRF58U9TwbP+Vl//PYHSH// YMFQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=+R4gZe/sViDjSJ+/IN1mjgukCy6kR0HogPt9Jm3IoDU=; b=YGWx11eJTafxHy/pmDc7Sctb6LGI+BEF7dKNysJpARjcmmUdubXOeDcnF3eeCZxLBd h4Ae3ld09E2qhYTg9UtJJUbwkoXETEoKXyxgZTAh6RwrBhGBSew+C1cwJ9K9ZtwN4lIE bgPhSxgd3VOMJEu0jM9xYkW5+8x6OpZK8yjU/F9UyyZTmsfTRE8UKE9rY9yUw7lNVtis bKfk2uH7VIygRQJ4S1oXnmUkOb0kaLPUKRkS0vhoIRI4DO2o40ZokA/1xs5FSNnRPZkm YjDHGzM6/TsvfyvX299HPkwGVlFaJMooe5tlFLNqoR31qyYKjL+k6eR7gVJGDQM9pq7j rDVg== X-Gm-Message-State: AOAM530qCPi4Q794j5UCRjvre8u4J4oZwwFDucFAo1tgJrf8JkqghE9P psbK0qiHHozmg4EUsxifcgFh/g== X-Google-Smtp-Source: ABdhPJwGUNBLBmGj3Cfa1FBU3DIecpDbP/DD5Jq1n3YwlrHnAG6oqh0ccHZTH6SoD5aZiSfSDoUz2A== X-Received: by 2002:a05:6870:2396:b0:d4:30d1:d5c with SMTP id e22-20020a056870239600b000d430d10d5cmr5910382oap.51.1646346728824; Thu, 03 Mar 2022 14:32:08 -0800 (PST) Received: from ripper.. ([2600:1700:a0:3dc8:205:1bff:fec0:b9b3]) by smtp.gmail.com with ESMTPSA id fq14-20020a0568710b0e00b000d4492531a2sm1764777oab.17.2022.03.03.14.32.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Mar 2022 14:32:08 -0800 (PST) From: Bjorn Andersson To: Rob Herring , Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus , "Rafael J. Wysocki" , Hans de Goede Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Dmitry Baryshkov Subject: [PATCH v3 6/6] usb: typec: mux: Add On Semi fsa4480 driver Date: Thu, 3 Mar 2022 14:33:51 -0800 Message-Id: <20220303223351.141238-6-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20220303223351.141238-1-bjorn.andersson@linaro.org> References: <20220303223351.141238-1-bjorn.andersson@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org The ON Semiconductor FSA4480 is a USB Type-C port multimedia switch with support for analog audio headsets. It allows sharing a common USB Type-C port to pass USB2.0 signal, analog audio, sideband use wires and analog microphone signal. Due to lacking upstream audio support for testing, the audio muxing is left untouched, but implementation of muxing the SBU lines is provided as a pair of Type-C mux and switch devices. This provides the necessary support for enabling the DisplayPort altmode on devices with this circuit. Signed-off-by: Bjorn Andersson --- Changes since v2: - Expanded Kconfig help text. - Fixed copyright year - Fixed spelling mistakes in comments - Introduce FSA4480_MAX_REGISTER - Use dev_err_probe() - Removed some useless blank lines. Changes since v1: - None drivers/usb/typec/mux/Kconfig | 10 ++ drivers/usb/typec/mux/Makefile | 1 + drivers/usb/typec/mux/fsa4480.c | 216 ++++++++++++++++++++++++++++++++ 3 files changed, 227 insertions(+) create mode 100644 drivers/usb/typec/mux/fsa4480.c diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig index edead555835e..5eb2c17d72c1 100644 --- a/drivers/usb/typec/mux/Kconfig +++ b/drivers/usb/typec/mux/Kconfig @@ -2,6 +2,16 @@ menu "USB Type-C Multiplexer/DeMultiplexer Switch support" +config TYPEC_MUX_FSA4480 + tristate "ON Semi FSA4480 Analog Audio Switch driver" + depends on I2C + select REGMAP_I2C + help + Driver for the ON Semiconductor FSA4480 Analog Audio Switch, which + provides support for muxing analog audio and sideband signals on a + common USB Type-C connector. + If compiled as a module, the module will be named fsa4480. + config TYPEC_MUX_PI3USB30532 tristate "Pericom PI3USB30532 Type-C cross switch driver" depends on I2C diff --git a/drivers/usb/typec/mux/Makefile b/drivers/usb/typec/mux/Makefile index 280a6f553115..e52a56c16bfb 100644 --- a/drivers/usb/typec/mux/Makefile +++ b/drivers/usb/typec/mux/Makefile @@ -1,4 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_TYPEC_MUX_FSA4480) += fsa4480.o obj-$(CONFIG_TYPEC_MUX_PI3USB30532) += pi3usb30532.o obj-$(CONFIG_TYPEC_MUX_INTEL_PMC) += intel_pmc_mux.o diff --git a/drivers/usb/typec/mux/fsa4480.c b/drivers/usb/typec/mux/fsa4480.c new file mode 100644 index 000000000000..ab8d014a6b79 --- /dev/null +++ b/drivers/usb/typec/mux/fsa4480.c @@ -0,0 +1,216 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021-2022 Linaro Ltd. + * Copyright (C) 2018-2020 The Linux Foundation + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define FSA4480_SWITCH_ENABLE 0x04 +#define FSA4480_SWITCH_SELECT 0x05 +#define FSA4480_SWITCH_STATUS1 0x07 +#define FSA4480_SLOW_L 0x08 +#define FSA4480_SLOW_R 0x09 +#define FSA4480_SLOW_MIC 0x0a +#define FSA4480_SLOW_SENSE 0x0b +#define FSA4480_SLOW_GND 0x0c +#define FSA4480_DELAY_L_R 0x0d +#define FSA4480_DELAY_L_MIC 0x0e +#define FSA4480_DELAY_L_SENSE 0x0f +#define FSA4480_DELAY_L_AGND 0x10 +#define FSA4480_RESET 0x1e +#define FSA4480_MAX_REGISTER 0x1f + +#define FSA4480_ENABLE_DEVICE BIT(7) +#define FSA4480_ENABLE_SBU GENMASK(6, 5) +#define FSA4480_ENABLE_USB GENMASK(4, 3) + +#define FSA4480_SEL_SBU_REVERSE GENMASK(6, 5) +#define FSA4480_SEL_USB GENMASK(4, 3) + +struct fsa4480 { + struct i2c_client *client; + + /* used to serialize concurrent change requests */ + struct mutex lock; + + struct typec_switch_dev *sw; + struct typec_mux_dev *mux; + + struct regmap *regmap; + + u8 cur_enable; + u8 cur_select; +}; + +static const struct regmap_config fsa4480_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = FSA4480_MAX_REGISTER, +}; + +static int fsa4480_switch_set(struct typec_switch_dev *sw, + enum typec_orientation orientation) +{ + struct fsa4480 *fsa = typec_switch_get_drvdata(sw); + u8 new_sel; + + mutex_lock(&fsa->lock); + new_sel = FSA4480_SEL_USB; + if (orientation == TYPEC_ORIENTATION_REVERSE) + new_sel |= FSA4480_SEL_SBU_REVERSE; + + if (new_sel == fsa->cur_select) + goto out_unlock; + + if (fsa->cur_enable & FSA4480_ENABLE_SBU) { + /* Disable SBU output while re-configuring the switch */ + regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE, + fsa->cur_enable & ~FSA4480_ENABLE_SBU); + + /* 35us to allow the SBU switch to turn off */ + usleep_range(35, 1000); + } + + regmap_write(fsa->regmap, FSA4480_SWITCH_SELECT, new_sel); + fsa->cur_select = new_sel; + + if (fsa->cur_enable & FSA4480_ENABLE_SBU) { + regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE, fsa->cur_enable); + + /* 15us to allow the SBU switch to turn on again */ + usleep_range(15, 1000); + } + +out_unlock: + mutex_unlock(&fsa->lock); + + return 0; +} + +static int fsa4480_mux_set(struct typec_mux_dev *mux, struct typec_mux_state *state) +{ + struct fsa4480 *fsa = typec_mux_get_drvdata(mux); + u8 new_enable; + + mutex_lock(&fsa->lock); + + new_enable = FSA4480_ENABLE_DEVICE | FSA4480_ENABLE_USB; + if (state->mode >= TYPEC_DP_STATE_A) + new_enable |= FSA4480_ENABLE_SBU; + + if (new_enable == fsa->cur_enable) + goto out_unlock; + + regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE, new_enable); + fsa->cur_enable = new_enable; + + if (new_enable & FSA4480_ENABLE_SBU) { + /* 15us to allow the SBU switch to turn off */ + usleep_range(15, 1000); + } + +out_unlock: + mutex_unlock(&fsa->lock); + + return 0; +} + +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; + + fsa = devm_kzalloc(dev, sizeof(*fsa), GFP_KERNEL); + if (!fsa) + return -ENOMEM; + + fsa->client = client; + mutex_init(&fsa->lock); + + 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"); + + fsa->cur_enable = FSA4480_ENABLE_DEVICE | FSA4480_ENABLE_USB; + fsa->cur_select = FSA4480_SEL_USB; + + /* set default settings */ + regmap_write(fsa->regmap, FSA4480_SLOW_L, 0x00); + regmap_write(fsa->regmap, FSA4480_SLOW_R, 0x00); + regmap_write(fsa->regmap, FSA4480_SLOW_MIC, 0x00); + regmap_write(fsa->regmap, FSA4480_SLOW_SENSE, 0x00); + regmap_write(fsa->regmap, FSA4480_SLOW_GND, 0x00); + regmap_write(fsa->regmap, FSA4480_DELAY_L_R, 0x00); + regmap_write(fsa->regmap, FSA4480_DELAY_L_MIC, 0x00); + regmap_write(fsa->regmap, FSA4480_DELAY_L_SENSE, 0x00); + regmap_write(fsa->regmap, FSA4480_DELAY_L_AGND, 0x09); + regmap_write(fsa->regmap, FSA4480_SWITCH_SELECT, fsa->cur_select); + regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE, fsa->cur_enable); + + sw_desc.drvdata = fsa; + sw_desc.fwnode = dev->fwnode; + sw_desc.set = fsa4480_switch_set; + + fsa->sw = typec_switch_register(dev, &sw_desc); + if (IS_ERR(fsa->sw)) + return dev_err_probe(dev, PTR_ERR(fsa->sw), "failed to register typec switch\n"); + + mux_desc.drvdata = fsa; + mux_desc.fwnode = dev->fwnode; + mux_desc.set = fsa4480_mux_set; + + fsa->mux = typec_mux_register(dev, &mux_desc); + if (IS_ERR(fsa->mux)) { + typec_switch_unregister(fsa->sw); + return dev_err_probe(dev, PTR_ERR(fsa->mux), "failed to register typec mux\n"); + } + + i2c_set_clientdata(client, fsa); + return 0; +} + +static int fsa4480_remove(struct i2c_client *client) +{ + struct fsa4480 *fsa = i2c_get_clientdata(client); + + typec_mux_unregister(fsa->mux); + typec_switch_unregister(fsa->sw); + + return 0; +} + +static const struct i2c_device_id fsa4480_table[] = { + { "fsa4480" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, fsa4480_table); + +static const struct of_device_id fsa4480_of_table[] = { + { .compatible = "fcs,fsa4480" }, + { } +}; +MODULE_DEVICE_TABLE(of, fsa4480_of_table); + +static struct i2c_driver fsa4480_driver = { + .driver = { + .name = "fsa4480", + .of_match_table = fsa4480_of_table, + }, + .probe_new = fsa4480_probe, + .remove = fsa4480_remove, + .id_table = fsa4480_table, +}; +module_i2c_driver(fsa4480_driver); + +MODULE_DESCRIPTION("ON Semiconductor FSA4480 driver"); +MODULE_LICENSE("GPL v2");