From patchwork Tue Feb 8 03:19:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 12738118 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 D39A9C433F5 for ; Tue, 8 Feb 2022 03:18:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346343AbiBHDSA (ORCPT ); Mon, 7 Feb 2022 22:18:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346362AbiBHDRx (ORCPT ); Mon, 7 Feb 2022 22:17:53 -0500 Received: from mail-oi1-x22e.google.com (mail-oi1-x22e.google.com [IPv6:2607:f8b0:4864:20::22e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 26BE3C0401EA for ; Mon, 7 Feb 2022 19:17:32 -0800 (PST) Received: by mail-oi1-x22e.google.com with SMTP id t199so19153792oie.10 for ; Mon, 07 Feb 2022 19:17:32 -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=rAkLb8/VLoPikmVZa34Mu//UHelRyndDtvFYFl2OKto=; b=iue8bSzTyvdjYeZNzqAXnDaHjza4sHPBnesVkgjWZLuMUDe+yr/N/sbOlRyENvBF0N 1TXyMUBIJCcvIXhC4O0pb6umZfg05Hn3o9IYpuJaLrXT63GGikEjE5S/vpIyTQa0tcSv JKB+cJuu41+Dq2zfZaGhSlRY8/2Hr8muFNDmzFFddx+JPCbNnhtDVnk6OUyBlvQOg+l2 VZDvUeUu0F1I/ZX9Yr7w99RojcK4zICZ3HzK5qhZnm3E/VtpxR2Ovrzz4jfQj7AnDb03 kBOjv2mecGdtYKeNE/33+sBqHQrdjwWwBHOEdFqtuk8y7VPfQYNOjE5G1ghdpIwI7D9R taSw== 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=rAkLb8/VLoPikmVZa34Mu//UHelRyndDtvFYFl2OKto=; b=3UbeNH9esAc2V9a0soo3EN/Sj8Q9XFryYpWZZrLZ2l45QH/cbHXThLsCNjQPFn2VY4 d54ZTOeeuB2XdY+GpztValU5c4gntt5wJW9fwV2l+y9/g/cN8bH7K87z7FyCxlxde1Lf Tt+agDPDhZft1zPpBhrsFxhLbFXS8xxfk2zpXI0EJjQe2Nvni9e93xK1yM9TF0nLe7V6 UIzLA3PeykRWw1E79M6UKUcDLjyjIl/WAe5FmpFGSd5EPpznXuIqACGYpFZDiylaBs6F aL0T0QRj5URw8jcikn1sNItVbnY7ke+DxLi0DBYQtSFgDOLjDC4GjxyxdZdiH5iTWOkW 8ayQ== X-Gm-Message-State: AOAM5323iOFkKGx3PHE5owZU8ttSsRMtbBPg7ujBt1yDR2wrWz0/k7Kb BFBHDHX0tIA9wamH0ya3Eu2j3Q== X-Google-Smtp-Source: ABdhPJzNScp8RSuMivte4BOUF9bsgowytVv6vzXMOktBX2aPf5BU+EgqYmoBW+BI9wUwTz9qbjOPlA== X-Received: by 2002:aca:eb55:: with SMTP id j82mr879492oih.134.1644290251402; Mon, 07 Feb 2022 19:17:31 -0800 (PST) Received: from ripper.. ([2600:1700:a0:3dc8:205:1bff:fec0:b9b3]) by smtp.gmail.com with ESMTPSA id k3sm4763873otl.41.2022.02.07.19.17.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Feb 2022 19:17:30 -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 v2 6/6] usb: typec: mux: Add On Semi fsa4480 driver Date: Mon, 7 Feb 2022 19:19:44 -0800 Message-Id: <20220208031944.3444-7-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20220208031944.3444-1-bjorn.andersson@linaro.org> References: <20220208031944.3444-1-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 TypeC 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 v1: - None drivers/usb/typec/mux/Kconfig | 9 ++ drivers/usb/typec/mux/Makefile | 1 + drivers/usb/typec/mux/fsa4480.c | 220 ++++++++++++++++++++++++++++++++ 3 files changed, 230 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..5e20112c3f51 100644 --- a/drivers/usb/typec/mux/Kconfig +++ b/drivers/usb/typec/mux/Kconfig @@ -2,6 +2,15 @@ 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. + 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..ac2d8648db6a --- /dev/null +++ b/drivers/usb/typec/mux/fsa4480.c @@ -0,0 +1,220 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021 Linaro Ltd. + * Copyright (C) 2018-2020 The Linux Foundation + */ + +#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_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 concurrect 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_RESET, +}; + +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)) { + dev_err(dev, "failed to initialize regmap\n"); + return PTR_ERR(fsa->regmap); + } + + 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)) { + dev_err(dev, "failed to register typec switch: %ld\n", PTR_ERR(fsa->sw)); + return PTR_ERR(fsa->sw); + } + + 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); + dev_err(dev, "failed to register typec mux: %ld\n", PTR_ERR(fsa->mux)); + return PTR_ERR(fsa->mux); + } + + 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");