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Fri, 01 Nov 2024 09:30:03 -0700 (PDT) Received: from [127.0.1.1] ([82.76.168.176]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4327d69845csm66697555e9.47.2024.11.01.09.30.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Nov 2024 09:30:03 -0700 (PDT) From: Abel Vesa Date: Fri, 01 Nov 2024 18:29:40 +0200 Subject: [PATCH v4 2/4] usb: typec: Add support for Parade PS8830 Type-C Retimer Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241101-x1e80100-ps8830-v4-2-f0f7518b263e@linaro.org> References: <20241101-x1e80100-ps8830-v4-0-f0f7518b263e@linaro.org> In-Reply-To: <20241101-x1e80100-ps8830-v4-0-f0f7518b263e@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 The Parade PS8830 is a USB4, DisplayPort and Thunderbolt 4 retimer, controlled over I2C. It usually sits between a USB/DisplayPort PHY and the Type-C connector, and provides orientation and altmode handling. The boards that use this retimer are the ones featuring the Qualcomm Snapdragon X Elite SoCs. Add a driver with support for the following modes: - DisplayPort 4-lanes - DisplayPort 2-lanes + USB3 - USB3 There is another variant of this retimer which is called PS8833. It seems to be really similar to the PS8830, so future-proof this driver by naming it ps883x. Signed-off-by: Abel Vesa --- drivers/usb/typec/mux/Kconfig | 10 + drivers/usb/typec/mux/Makefile | 1 + drivers/usb/typec/mux/ps883x.c | 422 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 433 insertions(+) diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig index ce7db6ad30572a0a74890f5f11944fb3ff07f635..10c3464324dd7226e0c7304a99d6a558d3743553 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_PS883X + tristate "Parade PS883x 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 PS883x 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..732aded5f0590b21d45deb07bb9751d807c115f7 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-$(CONFIG_TYPEC_MUX_PS883X) += ps883x.o obj-$(CONFIG_TYPEC_MUX_PTN36502) += ptn36502.o obj-$(CONFIG_TYPEC_MUX_WCD939X_USBSS) += wcd939x-usbss.o diff --git a/drivers/usb/typec/mux/ps883x.c b/drivers/usb/typec/mux/ps883x.c new file mode 100644 index 0000000000000000000000000000000000000000..101e3dc3a867601f13385f55935af5a9701e7ec3 --- /dev/null +++ b/drivers/usb/typec/mux/ps883x.c @@ -0,0 +1,422 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Parade ps883x usb retimer driver + * + * Copyright (C) 2024 Linaro Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct ps883x_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; + unsigned int svid; +}; + +static void ps883x_configure(struct ps883x_retimer *retimer, int cfg0, int cfg1, int cfg2) +{ + regmap_write(retimer->regmap, 0x0, cfg0); + regmap_write(retimer->regmap, 0x1, cfg1); + regmap_write(retimer->regmap, 0x2, cfg2); +} + +static int ps883x_set(struct ps883x_retimer *retimer) +{ + int cfg0 = 0x00; + int cfg1 = 0x00; + int cfg2 = 0x00; + + if (retimer->orientation == TYPEC_ORIENTATION_NONE || + retimer->mode == TYPEC_STATE_SAFE) { + ps883x_configure(retimer, 0x1, 0x0, 0x0); + return 0; + } + + if (retimer->mode != TYPEC_STATE_USB && retimer->svid != USB_TYPEC_DP_SID) + return -EINVAL; + + if (retimer->orientation == TYPEC_ORIENTATION_NORMAL) + cfg0 = 0x01; + else + cfg0 = 0x03; + + switch (retimer->mode) { + case TYPEC_STATE_USB: + cfg0 |= 0x20; + break; + + case TYPEC_DP_STATE_C: + cfg1 = 0x85; + break; + + case TYPEC_DP_STATE_D: + cfg0 |= 0x20; + cfg1 = 0x85; + break; + + case TYPEC_DP_STATE_E: + cfg1 = 0x81; + break; + + default: + return -EOPNOTSUPP; + } + + ps883x_configure(retimer, cfg0, cfg1, cfg2); + + return 0; +} + +static int ps883x_sw_set(struct typec_switch_dev *sw, + enum typec_orientation orientation) +{ + struct ps883x_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 = ps883x_set(retimer); + } + + mutex_unlock(&retimer->lock); + + return ret; +} + +static int ps883x_retimer_set(struct typec_retimer *rtmr, + struct typec_retimer_state *state) +{ + struct ps883x_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; + + if (state->alt) + retimer->svid = state->alt->svid; + else + retimer->svid = 0; // No SVID + + ret = ps883x_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 ps883x_enable_vregs(struct ps883x_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 void ps883x_disable_vregs(struct ps883x_retimer *retimer) +{ + 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); +} + +static int ps883x_get_vregs(struct ps883x_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 ps883x_retimer_regmap = { + .max_register = 0x1f, + .reg_bits = 8, + .val_bits = 8, +}; + +static int ps883x_retimer_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct typec_switch_desc sw_desc = { }; + struct typec_retimer_desc rtmr_desc = { }; + struct ps883x_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, &ps883x_retimer_regmap); + if (IS_ERR(retimer->regmap)) { + ret = PTR_ERR(retimer->regmap); + dev_err(dev, "failed to allocate register map: %d\n", ret); + return ret; + } + + ret = ps883x_get_vregs(retimer); + if (ret) + return ret; + + retimer->xo_clk = devm_clk_get(dev, NULL); + 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_ASIS); + 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 = typec_switch_get(dev); + if (IS_ERR(retimer->typec_switch)) + return dev_err_probe(dev, PTR_ERR(retimer->typec_switch), + "failed to acquire orientation-switch\n"); + + retimer->typec_mux = typec_mux_get(dev); + if (IS_ERR(retimer->typec_mux)) { + ret = dev_err_probe(dev, PTR_ERR(retimer->typec_mux), + "failed to acquire mode-mux\n"); + goto err_switch_put; + } + + ret = drm_aux_bridge_register(dev); + if (ret) + goto err_mux_put; + + ret = clk_prepare_enable(retimer->xo_clk); + if (ret) { + dev_err(dev, "failed to enable XO: %d\n", ret); + goto err_mux_put; + } + + ret = ps883x_enable_vregs(retimer); + if (ret) + goto err_clk_disable; + + sw_desc.drvdata = retimer; + sw_desc.fwnode = dev_fwnode(dev); + sw_desc.set = ps883x_sw_set; + + retimer->sw = typec_switch_register(dev, &sw_desc); + if (IS_ERR(retimer->sw)) { + ret = PTR_ERR(retimer->sw); + dev_err(dev, "failed to register typec switch: %d\n", ret); + goto err_vregs_disable; + } + + rtmr_desc.drvdata = retimer; + rtmr_desc.fwnode = dev_fwnode(dev); + rtmr_desc.set = ps883x_retimer_set; + + retimer->retimer = typec_retimer_register(dev, &rtmr_desc); + if (IS_ERR(retimer->retimer)) { + ret = PTR_ERR(retimer->retimer); + dev_err(dev, "failed to register typec retimer: %d\n", ret); + goto err_switch_unregister; + } + + /* skip resetting if already configured */ + if (regmap_test_bits(retimer->regmap, 0x00, BIT(0))) + return 0; + + gpiod_direction_output(retimer->reset_gpio, 1); + + /* VDD IO supply enable to reset release delay */ + usleep_range(4000, 14000); + + gpiod_set_value(retimer->reset_gpio, 0); + + /* firmware initialization delay */ + msleep(60); + + return 0; + +err_switch_unregister: + typec_switch_unregister(retimer->sw); +err_vregs_disable: + ps883x_disable_vregs(retimer); +err_clk_disable: + 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 ps883x_retimer_remove(struct i2c_client *client) +{ + struct ps883x_retimer *retimer = i2c_get_clientdata(client); + + typec_retimer_unregister(retimer->retimer); + typec_switch_unregister(retimer->sw); + + gpiod_set_value(retimer->reset_gpio, 1); + + 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 ps883x_retimer_of_table[] = { + { .compatible = "parade,ps8830" }, + { } +}; +MODULE_DEVICE_TABLE(of, ps883x_retimer_of_table); + +static struct i2c_driver ps883x_retimer_driver = { + .driver = { + .name = "ps883x_retimer", + .of_match_table = ps883x_retimer_of_table, + }, + .probe = ps883x_retimer_probe, + .remove = ps883x_retimer_remove, +}; + +module_i2c_driver(ps883x_retimer_driver); + +MODULE_DESCRIPTION("Parade ps883x Type-C Retimer driver"); +MODULE_LICENSE("GPL");