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Fri, 04 Oct 2024 06:57:55 -0700 (PDT) Received: from [127.0.1.1] ([82.77.84.93]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-37d08215cd6sm3302550f8f.28.2024.10.04.06.57.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Oct 2024 06:57:54 -0700 (PDT) From: Abel Vesa Date: Fri, 04 Oct 2024 16:57:37 +0300 Subject: [PATCH v2 1/2] dt-bindings: usb: Add Parade PS8830 Type-C retimer bindings Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241004-x1e80100-ps8830-v2-1-5cd8008c8c40@linaro.org> References: <20241004-x1e80100-ps8830-v2-0-5cd8008c8c40@linaro.org> In-Reply-To: <20241004-x1e80100-ps8830-v2-0-5cd8008c8c40@linaro.org> To: Heikki Krogerus , Greg Kroah-Hartman , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, Bjorn Andersson , Konrad Dybcio , Rajendra Nayak , Sibi Sankar , Johan Hovold , Dmitry Baryshkov , Trilok Soni , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, Abel Vesa X-Mailer: b4 0.15-dev-dedf8 X-Developer-Signature: v=1; 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a=openpgp; fpr=6AFF162D57F4223A8770EF5AF7BF214136F41FAE Document bindings for the Parade PS8830 Type-C retimer. This retimer is currently found on all boards featuring Qualcomm Snapdragon X Elite SoCs and it is needed to provide altmode muxing between DP and USB, but also connector orientation handling between. Signed-off-by: Abel Vesa --- .../devicetree/bindings/usb/parade,ps8830.yaml | 129 +++++++++++++++++++++ 1 file changed, 129 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/parade,ps8830.yaml b/Documentation/devicetree/bindings/usb/parade,ps8830.yaml new file mode 100644 index 0000000000000000000000000000000000000000..f6721d6eee26c6d4590a12c19791b3d47a8145f3 --- /dev/null +++ b/Documentation/devicetree/bindings/usb/parade,ps8830.yaml @@ -0,0 +1,129 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/usb/parade,ps8830.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Parade PS8830 USB and DisplayPort Retimer + +maintainers: + - Abel Vesa + +properties: + compatible: + enum: + - parade,ps8830 + + reg: + maxItems: 1 + + clocks: + items: + - description: XO Clock + + clock-names: + items: + - const: xo + + reset-gpios: + maxItems: 1 + + vdd-supply: + description: power supply (1.07V) + + vdd33-supply: + description: power supply (3.3V) + + vdd33-cap-supply: + description: power supply (3.3V) + + vddar-supply: + description: power supply (1.07V) + + vddat-supply: + description: power supply (1.07V) + + vddio-supply: + description: power supply (1.2V or 1.8V) + + orientation-switch: true + retimer-switch: true + + ports: + $ref: /schemas/graph.yaml#/properties/ports + properties: + port@0: + $ref: /schemas/graph.yaml#/properties/port + description: Super Speed (SS) Output endpoint to the Type-C connector + + port@1: + $ref: /schemas/graph.yaml#/$defs/port-base + description: Super Speed (SS) Input endpoint from the Super-Speed PHY + unevaluatedProperties: false + + port@2: + $ref: /schemas/graph.yaml#/properties/port + description: + Sideband Use (SBU) AUX lines endpoint to the Type-C connector for the purpose of + handling altmode muxing and orientation switching. + +required: + - compatible + - reg + +allOf: + - $ref: usb-switch.yaml# + +additionalProperties: false + +examples: + - | + #include + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + typec-mux@8 { + compatible = "parade,ps8830"; + reg = <0x8>; + + vdd-supply = <&vreg_rtmr_1p15>; + vdd33-supply = <&vreg_rtmr_3p3>; + vdd33-cap-supply = <&vreg_rtmr_3p3>; + vddar-supply = <&vreg_rtmr_1p15>; + vddat-supply = <&vreg_rtmr_1p15>; + vddio-supply = <&vreg_rtmr_1p8>; + + reset-gpios = <&pm8550_gpios 10 GPIO_ACTIVE_HIGH>; + + retimer-switch; + orientation-switch; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + usb_con_ss: endpoint { + remote-endpoint = <&typec_con_ss>; + }; + }; + port@1 { + reg = <1>; + phy_con_ss: endpoint { + remote-endpoint = <&usb_phy_ss>; + data-lanes = <3 2 1 0>; + }; + }; + port@2 { + reg = <2>; + usb_con_sbu: endpoint { + remote-endpoint = <&typec_dp_aux>; + }; + }; + }; + }; + }; +... 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a=openpgp; fpr=6AFF162D57F4223A8770EF5AF7BF214136F41FAE The Parade PS8830 is a Type-C muti-protocol retimer controlled over I2C. It provides both altmode and orientation handling. Add a driver with support for the following modes: - DP 4lanes - DP 2lanes + USB3 - USB3 Signed-off-by: Abel Vesa --- drivers/usb/typec/mux/Kconfig | 10 + drivers/usb/typec/mux/Makefile | 1 + drivers/usb/typec/mux/ps8830.c | 424 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 435 insertions(+) diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig index ce7db6ad30572a0a74890f5f11944fb3ff07f635..48613b67f1c5dacd14d54baf91c3066377cf97be 100644 --- a/drivers/usb/typec/mux/Kconfig +++ b/drivers/usb/typec/mux/Kconfig @@ -56,6 +56,16 @@ config TYPEC_MUX_NB7VPQ904M Say Y or M if your system has a On Semiconductor NB7VPQ904M Type-C redriver chip found on some devices with a Type-C port. +config TYPEC_MUX_PS8830 + tristate "Parade PS8830 Type-C retimer driver" + depends on I2C + depends on DRM || DRM=n + select DRM_AUX_BRIDGE if DRM_BRIDGE && OF + select REGMAP_I2C + help + Say Y or M if your system has a Parade PS8830 Type-C retimer chip + found on some devices with a Type-C port. + config TYPEC_MUX_PTN36502 tristate "NXP PTN36502 Type-C redriver driver" depends on I2C diff --git a/drivers/usb/typec/mux/Makefile b/drivers/usb/typec/mux/Makefile index bb96f30267af05b33b9277dcf1cc0e1527d2dcdd..4b23b12cfe45a0ff8a37f38c7ba050f572d556e7 100644 --- a/drivers/usb/typec/mux/Makefile +++ b/drivers/usb/typec/mux/Makefile @@ -6,5 +6,6 @@ obj-$(CONFIG_TYPEC_MUX_PI3USB30532) += pi3usb30532.o 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_PS8830) += ps8830.o obj-$(CONFIG_TYPEC_MUX_PTN36502) += ptn36502.o obj-$(CONFIG_TYPEC_MUX_WCD939X_USBSS) += wcd939x-usbss.o diff --git a/drivers/usb/typec/mux/ps8830.c b/drivers/usb/typec/mux/ps8830.c new file mode 100644 index 0000000000000000000000000000000000000000..58990f7860bf77ec12d00f0d3df3a40735bbf9d8 --- /dev/null +++ b/drivers/usb/typec/mux/ps8830.c @@ -0,0 +1,424 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Parade PS8830 usb retimer driver + * + * Copyright (C) 2024 Linaro Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct ps8830_retimer { + struct i2c_client *client; + struct gpio_desc *reset_gpio; + struct regmap *regmap; + struct typec_switch_dev *sw; + struct typec_retimer *retimer; + struct clk *xo_clk; + struct regulator *vdd_supply; + struct regulator *vdd33_supply; + struct regulator *vdd33_cap_supply; + struct regulator *vddat_supply; + struct regulator *vddar_supply; + struct regulator *vddio_supply; + + struct typec_switch *typec_switch; + struct typec_mux *typec_mux; + + struct mutex lock; /* protect non-concurrent retimer & switch */ + + enum typec_orientation orientation; + unsigned long mode; + int cfg[3]; +}; + +static void ps8830_write(struct ps8830_retimer *retimer, int cfg0, int cfg1, int cfg2) +{ + if (cfg0 == retimer->cfg[0] && + cfg1 == retimer->cfg[1] && + cfg2 == retimer->cfg[2]) + return; + + retimer->cfg[0] = cfg0; + retimer->cfg[1] = cfg1; + retimer->cfg[2] = cfg2; + + regmap_write(retimer->regmap, 0x0, cfg0); + regmap_write(retimer->regmap, 0x1, cfg1); + regmap_write(retimer->regmap, 0x2, cfg2); +} + +static void ps8830_configure(struct ps8830_retimer *retimer, int cfg0, int cfg1, int cfg2) +{ + /* Write safe-mode config before switching to new config */ + ps8830_write(retimer, 0x1, 0x0, 0x0); + + ps8830_write(retimer, cfg0, cfg1, cfg2); +} + +static int ps8380_set(struct ps8830_retimer *retimer) +{ + int cfg0 = 0x00; + int cfg1 = 0x00; + int cfg2 = 0x00; + + if (retimer->orientation == TYPEC_ORIENTATION_NONE || + retimer->mode == TYPEC_STATE_SAFE) { + ps8830_write(retimer, 0x1, 0x0, 0x0); + return 0; + } + + if (retimer->orientation == TYPEC_ORIENTATION_NORMAL) + cfg0 = 0x01; + else + cfg0 = 0x03; + + switch (retimer->mode) { + /* USB3 Only */ + case TYPEC_STATE_USB: + cfg0 |= 0x20; + break; + + /* DP Only */ + case TYPEC_DP_STATE_C: + cfg1 = 0x85; + break; + + case TYPEC_DP_STATE_E: + cfg1 = 0x81; + break; + + /* DP + USB */ + case TYPEC_DP_STATE_D: + cfg0 |= 0x20; + cfg1 = 0x85; + break; + + default: + return -EOPNOTSUPP; + } + + ps8830_configure(retimer, cfg0, cfg1, cfg2); + + return 0; +} + +static int ps8830_sw_set(struct typec_switch_dev *sw, + enum typec_orientation orientation) +{ + struct ps8830_retimer *retimer = typec_switch_get_drvdata(sw); + int ret = 0; + + ret = typec_switch_set(retimer->typec_switch, orientation); + if (ret) + return ret; + + mutex_lock(&retimer->lock); + + if (retimer->orientation != orientation) { + retimer->orientation = orientation; + + ret = ps8380_set(retimer); + } + + mutex_unlock(&retimer->lock); + + return ret; +} + +static int ps8830_retimer_set(struct typec_retimer *rtmr, + struct typec_retimer_state *state) +{ + struct ps8830_retimer *retimer = typec_retimer_get_drvdata(rtmr); + struct typec_mux_state mux_state; + int ret = 0; + + mutex_lock(&retimer->lock); + + if (state->mode != retimer->mode) { + retimer->mode = state->mode; + + ret = ps8380_set(retimer); + } + + mutex_unlock(&retimer->lock); + + if (ret) + return ret; + + mux_state.alt = state->alt; + mux_state.data = state->data; + mux_state.mode = state->mode; + + return typec_mux_set(retimer->typec_mux, &mux_state); +} + +static int ps8830_enable_vregs(struct ps8830_retimer *retimer) +{ + struct device *dev = &retimer->client->dev; + int ret; + + ret = regulator_enable(retimer->vdd33_supply); + if (ret) { + dev_err(dev, "cannot enable VDD 3.3V regulator: %d\n", ret); + return ret; + } + + ret = regulator_enable(retimer->vdd33_cap_supply); + if (ret) { + dev_err(dev, "cannot enable VDD 3.3V CAP regulator: %d\n", ret); + goto err_vdd33_disable; + } + + usleep_range(4000, 10000); + + ret = regulator_enable(retimer->vdd_supply); + if (ret) { + dev_err(dev, "cannot enable VDD regulator: %d\n", ret); + goto err_vdd33_cap_disable; + } + + ret = regulator_enable(retimer->vddar_supply); + if (ret) { + dev_err(dev, "cannot enable VDD AR regulator: %d\n", ret); + goto err_vdd_disable; + } + + ret = regulator_enable(retimer->vddat_supply); + if (ret) { + dev_err(dev, "cannot enable VDD AT regulator: %d\n", ret); + goto err_vddar_disable; + } + + ret = regulator_enable(retimer->vddio_supply); + if (ret) { + dev_err(dev, "cannot enable VDD IO regulator: %d\n", ret); + goto err_vddat_disable; + } + + return 0; + +err_vddat_disable: + regulator_disable(retimer->vddat_supply); + +err_vddar_disable: + regulator_disable(retimer->vddar_supply); + +err_vdd_disable: + regulator_disable(retimer->vdd_supply); + +err_vdd33_cap_disable: + regulator_disable(retimer->vdd33_cap_supply); + +err_vdd33_disable: + regulator_disable(retimer->vdd33_supply); + + return ret; +} + +static int ps8830_get_vregs(struct ps8830_retimer *retimer) +{ + struct device *dev = &retimer->client->dev; + + retimer->vdd_supply = devm_regulator_get(dev, "vdd"); + if (IS_ERR(retimer->vdd_supply)) + return dev_err_probe(dev, PTR_ERR(retimer->vdd_supply), + "failed to get VDD\n"); + + retimer->vdd33_supply = devm_regulator_get(dev, "vdd33"); + if (IS_ERR(retimer->vdd33_supply)) + return dev_err_probe(dev, PTR_ERR(retimer->vdd33_supply), + "failed to get VDD 3.3V\n"); + + retimer->vdd33_cap_supply = devm_regulator_get(dev, "vdd33-cap"); + if (IS_ERR(retimer->vdd33_cap_supply)) + return dev_err_probe(dev, PTR_ERR(retimer->vdd33_cap_supply), + "failed to get VDD CAP 3.3V\n"); + + retimer->vddat_supply = devm_regulator_get(dev, "vddat"); + if (IS_ERR(retimer->vddat_supply)) + return dev_err_probe(dev, PTR_ERR(retimer->vddat_supply), + "failed to get VDD AT\n"); + + retimer->vddar_supply = devm_regulator_get(dev, "vddar"); + if (IS_ERR(retimer->vddar_supply)) + return dev_err_probe(dev, PTR_ERR(retimer->vddar_supply), + "failed to get VDD AR\n"); + + retimer->vddio_supply = devm_regulator_get(dev, "vddio"); + if (IS_ERR(retimer->vddio_supply)) + return dev_err_probe(dev, PTR_ERR(retimer->vddio_supply), + "failed to get VDD IO\n"); + + return 0; +} + +static const struct regmap_config ps8830_retimer_regmap = { + .max_register = 0x1f, + .reg_bits = 8, + .val_bits = 8, +}; + +static int ps8830_retimer_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct typec_switch_desc sw_desc = { }; + struct typec_retimer_desc rtmr_desc = { }; + struct ps8830_retimer *retimer; + int ret; + + retimer = devm_kzalloc(dev, sizeof(*retimer), GFP_KERNEL); + if (!retimer) + return -ENOMEM; + + retimer->client = client; + + mutex_init(&retimer->lock); + + retimer->regmap = devm_regmap_init_i2c(client, &ps8830_retimer_regmap); + if (IS_ERR(retimer->regmap)) { + dev_err(dev, "failed to allocate register map\n"); + return PTR_ERR(retimer->regmap); + } + + ret = ps8830_get_vregs(retimer); + if (ret) + return ret; + + retimer->xo_clk = devm_clk_get(dev, "xo"); + if (IS_ERR(retimer->xo_clk)) + return dev_err_probe(dev, PTR_ERR(retimer->xo_clk), + "failed to get xo clock\n"); + + retimer->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(retimer->reset_gpio)) + return dev_err_probe(dev, PTR_ERR(retimer->reset_gpio), + "failed to get reset gpio\n"); + + retimer->typec_switch = fwnode_typec_switch_get(dev->fwnode); + if (IS_ERR(retimer->typec_switch)) { + dev_err(dev, "failed to acquire orientation-switch\n"); + return PTR_ERR(retimer->typec_switch); + } + + retimer->typec_mux = fwnode_typec_mux_get(dev->fwnode); + if (IS_ERR(retimer->typec_mux)) { + dev_err(dev, "failed to acquire mode-mux\n"); + goto err_switch_put; + } + + sw_desc.drvdata = retimer; + sw_desc.fwnode = dev_fwnode(dev); + sw_desc.set = ps8830_sw_set; + + ret = drm_aux_bridge_register(dev); + if (ret) + goto err_mux_put; + + retimer->sw = typec_switch_register(dev, &sw_desc); + if (IS_ERR(retimer->sw)) { + dev_err(dev, "failed to register typec switch\n"); + goto err_aux_bridge_unregister; + } + + rtmr_desc.drvdata = retimer; + rtmr_desc.fwnode = dev_fwnode(dev); + rtmr_desc.set = ps8830_retimer_set; + + retimer->retimer = typec_retimer_register(dev, &rtmr_desc); + if (IS_ERR(retimer->retimer)) { + dev_err(dev, "failed to register typec retimer\n"); + goto err_switch_unregister; + } + + ret = clk_prepare_enable(retimer->xo_clk); + if (ret) { + dev_err(dev, "failed to enable XO: %d\n", ret); + goto err_retimer_unregister; + } + + ret = ps8830_enable_vregs(retimer); + if (ret) + goto err_clk_disable; + + /* delay needed as per datasheet */ + usleep_range(4000, 14000); + + gpiod_set_value(retimer->reset_gpio, 1); + + return 0; + +err_clk_disable: + clk_disable_unprepare(retimer->xo_clk); + +err_retimer_unregister: + typec_retimer_unregister(retimer->retimer); + +err_switch_unregister: + typec_switch_unregister(retimer->sw); + +err_aux_bridge_unregister: + gpiod_set_value(retimer->reset_gpio, 0); + clk_disable_unprepare(retimer->xo_clk); + +err_mux_put: + typec_mux_put(retimer->typec_mux); + +err_switch_put: + typec_switch_put(retimer->typec_switch); + + return ret; +} + +static void ps8830_retimer_remove(struct i2c_client *client) +{ + struct ps8830_retimer *retimer = i2c_get_clientdata(client); + + typec_retimer_unregister(retimer->retimer); + typec_switch_unregister(retimer->sw); + + gpiod_set_value(retimer->reset_gpio, 0); + + regulator_disable(retimer->vddio_supply); + regulator_disable(retimer->vddat_supply); + regulator_disable(retimer->vddar_supply); + regulator_disable(retimer->vdd_supply); + regulator_disable(retimer->vdd33_cap_supply); + regulator_disable(retimer->vdd33_supply); + + clk_disable_unprepare(retimer->xo_clk); + + typec_mux_put(retimer->typec_mux); + typec_switch_put(retimer->typec_switch); +} + +static const struct of_device_id ps8830_retimer_of_table[] = { + { .compatible = "parade,ps8830" }, + { } +}; +MODULE_DEVICE_TABLE(of, ps8830_retimer_of_table); + +static struct i2c_driver ps8830_retimer_driver = { + .driver = { + .name = "ps8830_retimer", + .of_match_table = ps8830_retimer_of_table, + }, + .probe = ps8830_retimer_probe, + .remove = ps8830_retimer_remove, +}; + +module_i2c_driver(ps8830_retimer_driver); + +MODULE_DESCRIPTION("Parade PS8830 Type-C Retimer driver"); +MODULE_LICENSE("GPL");