From patchwork Fri Oct 18 13:30:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Romain Gantois X-Patchwork-Id: 837169 Received: from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net [217.70.183.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AFB481DEFE1; Fri, 18 Oct 2024 13:31:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.199 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729258274; cv=none; b=NrluKVuf7XBJ9Y34GuXQYpWAjR89jgHl/0UBeNFIdlwb7Z2OETVLXRqHzWHq8QSqGPXWbXVCukXD/AneEs38VJX2dl3+0Wwxwo/gzlgGhPjFSH1jG4KaMXFGvNTlofdch3hQrq98/0qZKIv/1M4ynTBha2OP/fl9lvsUfX/o6dg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729258274; c=relaxed/simple; bh=p2KEb4CUIZF7S1JBfwJphfvDYYQ+liT23N+okkiKazw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=or6tQg2JeJKSEMcpjWNnEudjYcCuHt7jYWmIEVh2YpHyi4RSzPolGchGWwUBe12Rf1D+s6HuUbxnoOIfYdqEjAEizsrZo7KNydNQ/2xEF1V/4st7Sz7md7J0tU9xX3FvzOmBjb3UwvnipyUXcJkQh5mwQNUNBziM/KGHY9awX9I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=C+EDzkXm; arc=none smtp.client-ip=217.70.183.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="C+EDzkXm" Received: by mail.gandi.net (Postfix) with ESMTPSA id 0A5E1FF809; Fri, 18 Oct 2024 13:31:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1729258264; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YUuBSgWKPlYz70DAVXPMDqHHFgRqLNtVGIMMmZSdVtk=; b=C+EDzkXmjKcz4ov1cs88QCdWjmh55n2M7l2DrzIssfFJHtTBUClis4W1gWHkjYnwGwJ3jG FeIFJmVYLBYC4fHk6U9V6UuxSs3CT+aVxbhNIlujXCiLlJvz2VfJ7VzGgAlfWnXbevEwi1 9D3arFIa5vRF/WiOtUOrAm/SmHQd5eKtIwQL8oswCmw9xVPTrBiMfMUC8zuYjiDbL362eq Y1CmkZWy7nZHshMPPwBBb2bN11K7bvVx5/is/0Yrj/PYTNHQY47cNMVWxpusOICTAAI+GB P7U7kmeuiIqs2APgmzthFaryAsHXURPhJv6lJsG7BCc/Qr2ELpFAKra4vuux4g== From: Romain Gantois Date: Fri, 18 Oct 2024 15:30:49 +0200 Subject: [PATCH 2/2] usb: typec: mux: Add support for the TUSB1046 crosspoint switch Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241018-tusb1046-v1-2-a38312f18691@bootlin.com> References: <20241018-tusb1046-v1-0-a38312f18691@bootlin.com> In-Reply-To: <20241018-tusb1046-v1-0-a38312f18691@bootlin.com> To: Greg Kroah-Hartman , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heikki Krogerus Cc: Thomas Petazzoni , linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Romain Gantois X-Mailer: b4 0.14.2 X-GND-Sasl: romain.gantois@bootlin.com The TUSB1046-DCI is a USB-C linear redriver crosspoint switch, which can mux SuperSpeed lanes from a Type-C connector to a USB3.0 data lane or up to 4 display port lanes. Add support for driving the TUSB1046 as a Type-C orientation switch and DisplayPort altmode multiplexer. Signed-off-by: Romain Gantois --- MAINTAINERS | 7 ++ drivers/usb/typec/mux/Kconfig | 9 +++ drivers/usb/typec/mux/Makefile | 1 + drivers/usb/typec/mux/tusb1046.c | 161 +++++++++++++++++++++++++++++++++++++++ 4 files changed, 178 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index c27f3190737f8b85779bde5489639c8b899f4fd8..c880588b63f27d628edeec09fa7d904eeabbde92 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -24142,6 +24142,13 @@ L: linux-usb@vger.kernel.org S: Orphan F: drivers/usb/typec/tcpm/ +USB TYPEC TUSB1046 MUX DRIVER +M: Romain Gantois +L: linux-usb@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/usb/ti,tusb1046.yaml +F: drivers/usb/typec/mux/tusb1046.c + USB UHCI DRIVER M: Alan Stern L: linux-usb@vger.kernel.org diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig index ce7db6ad30572a0a74890f5f11944fb3ff07f635..67381b4ef4f68f4a6e73f157365ee24d0ab7109a 100644 --- a/drivers/usb/typec/mux/Kconfig +++ b/drivers/usb/typec/mux/Kconfig @@ -66,6 +66,15 @@ config TYPEC_MUX_PTN36502 Say Y or M if your system has a NXP PTN36502 Type-C redriver chip found on some devices with a Type-C port. +config TYPEC_MUX_TUSB1046 + tristate "TI TUSB1046 Type-C crosspoint switch driver" + depends on I2C + help + Driver for the Texas Instruments TUSB1046-DCI crosspoint switch. + Supports flipping USB-C SuperSpeed lanes to adapt to orientation + changes, as well as muxing DisplayPort and sideband signals to a + common Type-C connector. + config TYPEC_MUX_WCD939X_USBSS tristate "Qualcomm WCD939x USBSS Analog Audio Switch driver" depends on I2C diff --git a/drivers/usb/typec/mux/Makefile b/drivers/usb/typec/mux/Makefile index bb96f30267af05b33b9277dcf1cc0e1527d2dcdd..60879446da9365183567d3374a2fb7b5171fb3d7 100644 --- a/drivers/usb/typec/mux/Makefile +++ b/drivers/usb/typec/mux/Makefile @@ -7,4 +7,5 @@ obj-$(CONFIG_TYPEC_MUX_INTEL_PMC) += intel_pmc_mux.o obj-$(CONFIG_TYPEC_MUX_IT5205) += it5205.o obj-$(CONFIG_TYPEC_MUX_NB7VPQ904M) += nb7vpq904m.o obj-$(CONFIG_TYPEC_MUX_PTN36502) += ptn36502.o +obj-$(CONFIG_TYPEC_MUX_TUSB1046) += tusb1046.o obj-$(CONFIG_TYPEC_MUX_WCD939X_USBSS) += wcd939x-usbss.o diff --git a/drivers/usb/typec/mux/tusb1046.c b/drivers/usb/typec/mux/tusb1046.c new file mode 100644 index 0000000000000000000000000000000000000000..76edb83c057a764ccee7d717852c3eaaf02d808f --- /dev/null +++ b/drivers/usb/typec/mux/tusb1046.c @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Driver for the TUSB1046-DCI USB Type-C crosspoint switch + * + * Copyright (C) 2024 Bootlin + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define TUSB1046_REG_GENERAL 0xa + +/* General register bits */ +#define TUSB1046_GENERAL_FLIPSEL BIT(2) +#define TUSB1046_GENERAL_CTLSEL GENMASK(1, 0) + +/* Mux modes */ +#define TUSB1046_CTLSEL_DISABLED 0x0 +#define TUSB1046_CTLSEL_USB3 0x1 +#define TUSB1046_CTLSEL_4LANE_DP 0x2 +#define TUSB1046_CTLSEL_USB3_AND_2LANE_DP 0x3 + +struct tusb1046_priv { + struct i2c_client *client; + struct typec_switch_dev *sw; + struct typec_mux_dev *mux; +}; + +static int tusb1046_mux_set(struct typec_mux_dev *mux, + struct typec_mux_state *state) +{ + struct tusb1046_priv *priv = typec_mux_get_drvdata(mux); + struct i2c_client *client = priv->client; + struct device *dev = &client->dev; + int mode, val; + + dev_dbg(dev, "mux mode requested: %lu\n", state->mode); + + val = i2c_smbus_read_byte_data(client, TUSB1046_REG_GENERAL); + if (val < 0) { + dev_err(dev, "failed to read ctlsel status, err %d\n", val); + return val; + } + + switch (state->mode) { + case TYPEC_STATE_USB: + mode = TUSB1046_CTLSEL_USB3; + break; + case TYPEC_DP_STATE_C: + case TYPEC_DP_STATE_E: + mode = TUSB1046_CTLSEL_4LANE_DP; + break; + case TYPEC_DP_STATE_D: + mode = TUSB1046_CTLSEL_USB3_AND_2LANE_DP; + break; + case TYPEC_STATE_SAFE: + default: + mode = TUSB1046_CTLSEL_DISABLED; + break; + } + + val &= ~TUSB1046_GENERAL_CTLSEL; + val |= mode; + + return i2c_smbus_write_byte_data(client, TUSB1046_REG_GENERAL, val); +} + +static int tusb1046_switch_set(struct typec_switch_dev *sw, + enum typec_orientation orientation) +{ + struct tusb1046_priv *priv = typec_switch_get_drvdata(sw); + struct i2c_client *client = priv->client; + struct device *dev = &client->dev; + int val; + + dev_dbg(dev, "setting USB3.0 lane flip for orientation %d\n", orientation); + + val = i2c_smbus_read_byte_data(client, TUSB1046_REG_GENERAL); + if (val < 0) { + dev_err(dev, "failed to read flipsel status, err %d\n", val); + return val; + } + + if (orientation == TYPEC_ORIENTATION_REVERSE) + val |= TUSB1046_GENERAL_FLIPSEL; + else + val &= ~TUSB1046_GENERAL_FLIPSEL; + + return i2c_smbus_write_byte_data(client, TUSB1046_REG_GENERAL, val); +} + +static int tusb1046_i2c_probe(struct i2c_client *client) +{ + struct typec_switch_desc sw_desc = { }; + struct typec_mux_desc mux_desc = { }; + struct device *dev = &client->dev; + struct tusb1046_priv *priv; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return dev_err_probe(dev, -ENOMEM, "failed to allocate driver data\n"); + + priv->client = client; + + sw_desc.drvdata = priv; + sw_desc.fwnode = dev_fwnode(dev); + sw_desc.set = tusb1046_switch_set; + + priv->sw = typec_switch_register(dev, &sw_desc); + if (IS_ERR(priv->sw)) + return dev_err_probe(dev, PTR_ERR(priv->sw), "failed to register type-c switch\n"); + + mux_desc.drvdata = priv; + mux_desc.fwnode = dev_fwnode(dev); + mux_desc.set = tusb1046_mux_set; + + priv->mux = typec_mux_register(dev, &mux_desc); + if (IS_ERR(priv->mux)) { + typec_switch_unregister(priv->sw); + return dev_err_probe(dev, PTR_ERR(priv->mux), "failed to register type-c mux\n"); + } + + i2c_set_clientdata(client, priv); + + return 0; +} + +static void tusb1046_i2c_remove(struct i2c_client *client) +{ + struct tusb1046_priv *priv = i2c_get_clientdata(client); + + typec_switch_unregister(priv->sw); + typec_mux_unregister(priv->mux); +} + +static const struct of_device_id tusb1046_match_table[] = { + {.compatible = "ti,tusb1046"}, + {}, +}; + +static struct i2c_driver tusb1046_driver = { + .driver = { + .name = "tusb1046", + .of_match_table = tusb1046_match_table, + }, + .probe = tusb1046_i2c_probe, + .remove = tusb1046_i2c_remove, +}; + +module_i2c_driver(tusb1046_driver); + +MODULE_DESCRIPTION("TUSB1046 USB Type-C switch driver"); +MODULE_AUTHOR("Romain Gantois "); +MODULE_LICENSE("GPL");