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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241022-x1e80100-ps8830-v3-2-68a95f351e99@linaro.org> References: <20241022-x1e80100-ps8830-v3-0-68a95f351e99@linaro.org> In-Reply-To: <20241022-x1e80100-ps8830-v3-0-68a95f351e99@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; a=openpgp-sha256; l=13620; i=abel.vesa@linaro.org; h=from:subject:message-id; bh=GT1lbn8k9f8u7nUop/6c4FxPN3Au4MB9IOd8jwwntOY=; b=owEBbQKS/ZANAwAKARtfRMkAlRVWAcsmYgBnF336ZfXkiqHeFt96rNsKu6nlQAT6wwo1jg/Sd TaNpCW6qTSJAjMEAAEKAB0WIQRO8+4RTnqPKsqn0bgbX0TJAJUVVgUCZxd9+gAKCRAbX0TJAJUV VnXPEACimn3hZrXZ9WAD2w9hCxvvXDt/nc4ON25A68jKG+s/iodjy/ElBvbET+fBGZ8G6+yl0Mh zD4BcrC21sgZ4J2XpzoWlXemmL+zM0jSrPvheHaEXtv14LtomD8tf9uTUZEy414X3i07J7WTEub MFI2Fw2ByMU2MXnW8NqVCxfaMUlOOKZHv6JxMJba4xRiHPY5owWtQ2uCMeiqNaVg/lEoRfRr65e FYnKGv5EBSGJ6H3vfqOtQwUOAbrQKi/zOt1xmYPXrSGy41N0SljgfUlpQIfUieF604eZATROxXf XygvW4FS4BgtaVvl3a9cLkYE999o3ot3ySemj7iNDt2TlKMm1Wot5aEzDInAYWmNpqGXe2xb9wD QS4c0RRaLYdsvcZKIoZUGik23iER4bcSEmZ7YlzkBE3MMmyYlTakGEy7bna44prxu0jjiP7eAw+ Z91+jQg37fPl2r/HNSkWMR9Z5IRQgUG9T3Oe45PAKi1YnhuVIj7FQe939LB633wjW9CYl7Tenr4 vRjoKfpM0PioJXJbY3YzgNnIp9AiDKkyCh7PoWrxAU91n/CZIke2iiKGQVbYzaAOu6atiSX21S8 kytiR5kzpohslXvBDFnRGCw+wgVIgli7MsBxGdMGwe+gDtxTCY8o6LOvL2oBjplSzbBMNe9Lc4e 7Qfm5LIJglQx7/w== X-Developer-Key: i=abel.vesa@linaro.org; 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 | 423 +++++++++++++++++++++++++++++++++++++= ++++ 3 files changed, 434 insertions(+) diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig index ce7db6ad30572a0a74890f5f11944fb3ff07f635..48613b67f1c5dacd14d54baf91c= 3066377cf97be 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. =20 +config TYPEC_MUX_PS8830 + tristate "Parade PS8830 Type-C retimer driver" + depends on I2C + depends on DRM || DRM=3Dn + 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..4b23b12cfe45a0ff8a37f38c7ba= 050f572d556e7 100644 --- a/drivers/usb/typec/mux/Makefile +++ b/drivers/usb/typec/mux/Makefile @@ -6,5 +6,6 @@ obj-$(CONFIG_TYPEC_MUX_PI3USB30532) +=3D pi3usb30532.o obj-$(CONFIG_TYPEC_MUX_INTEL_PMC) +=3D intel_pmc_mux.o obj-$(CONFIG_TYPEC_MUX_IT5205) +=3D it5205.o obj-$(CONFIG_TYPEC_MUX_NB7VPQ904M) +=3D nb7vpq904m.o +obj-$(CONFIG_TYPEC_MUX_PS8830) +=3D ps8830.o obj-$(CONFIG_TYPEC_MUX_PTN36502) +=3D ptn36502.o obj-$(CONFIG_TYPEC_MUX_WCD939X_USBSS) +=3D 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..df83b2f3b562aec3794a27ca643= 325898c45c6ae --- /dev/null +++ b/drivers/usb/typec/mux/ps8830.c @@ -0,0 +1,423 @@ +// 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; + unsigned int svid; +}; + +static void ps8830_write(struct ps8830_retimer *retimer, int cfg0, int cfg= 1, int 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 =3D 0x00; + int cfg1 =3D 0x00; + int cfg2 =3D 0x00; + + if (retimer->orientation =3D=3D TYPEC_ORIENTATION_NONE || + retimer->mode =3D=3D TYPEC_STATE_SAFE) { + ps8830_write(retimer, 0x1, 0x0, 0x0); + return 0; + } + + if (retimer->mode !=3D TYPEC_STATE_USB && retimer->svid !=3D USB_TYPEC_DP= _SID) + return -EINVAL; + + if (retimer->orientation =3D=3D TYPEC_ORIENTATION_NORMAL) + cfg0 =3D 0x01; + else + cfg0 =3D 0x03; + + switch (retimer->mode) { + case TYPEC_STATE_USB: + cfg0 |=3D 0x20; + break; + + case TYPEC_DP_STATE_C: + cfg1 =3D 0x85; + break; + + case TYPEC_DP_STATE_D: + cfg0 |=3D 0x20; + cfg1 =3D 0x85; + break; + + case TYPEC_DP_STATE_E: + cfg1 =3D 0x81; + 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 =3D typec_switch_get_drvdata(sw); + int ret =3D 0; + + ret =3D typec_switch_set(retimer->typec_switch, orientation); + if (ret) + return ret; + + mutex_lock(&retimer->lock); + + if (retimer->orientation !=3D orientation) { + retimer->orientation =3D orientation; + + ret =3D 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 =3D typec_retimer_get_drvdata(rtmr); + struct typec_mux_state mux_state; + int ret =3D 0; + + mutex_lock(&retimer->lock); + + if (state->mode !=3D retimer->mode) { + retimer->mode =3D state->mode; + + if (state->alt) + retimer->svid =3D state->alt->svid; + else + retimer->svid =3D 0; // No SVID + + ret =3D ps8380_set(retimer); + } + + mutex_unlock(&retimer->lock); + + if (ret) + return ret; + + mux_state.alt =3D state->alt; + mux_state.data =3D state->data; + mux_state.mode =3D state->mode; + + return typec_mux_set(retimer->typec_mux, &mux_state); +} + +static int ps8830_enable_vregs(struct ps8830_retimer *retimer) +{ + struct device *dev =3D &retimer->client->dev; + int ret; + + ret =3D regulator_enable(retimer->vdd33_supply); + if (ret) { + dev_err(dev, "cannot enable VDD 3.3V regulator: %d\n", ret); + return ret; + } + + ret =3D 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 =3D regulator_enable(retimer->vdd_supply); + if (ret) { + dev_err(dev, "cannot enable VDD regulator: %d\n", ret); + goto err_vdd33_cap_disable; + } + + ret =3D regulator_enable(retimer->vddar_supply); + if (ret) { + dev_err(dev, "cannot enable VDD AR regulator: %d\n", ret); + goto err_vdd_disable; + } + + ret =3D regulator_enable(retimer->vddat_supply); + if (ret) { + dev_err(dev, "cannot enable VDD AT regulator: %d\n", ret); + goto err_vddar_disable; + } + + ret =3D 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 =3D &retimer->client->dev; + + retimer->vdd_supply =3D 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 =3D 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 =3D 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 =3D 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 =3D 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 =3D 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 =3D { + .max_register =3D 0x1f, + .reg_bits =3D 8, + .val_bits =3D 8, + .cache_type =3D REGCACHE_FLAT, +}; + +static int ps8830_retimer_probe(struct i2c_client *client) +{ + struct device *dev =3D &client->dev; + struct typec_switch_desc sw_desc =3D { }; + struct typec_retimer_desc rtmr_desc =3D { }; + struct ps8830_retimer *retimer; + bool skip_reset =3D false; + int ret; + + retimer =3D devm_kzalloc(dev, sizeof(*retimer), GFP_KERNEL); + if (!retimer) + return -ENOMEM; + + retimer->client =3D client; + + mutex_init(&retimer->lock); + + if (of_property_read_bool(dev->of_node, "ps8830,boot-on")) + skip_reset =3D true; + + retimer->regmap =3D devm_regmap_init_i2c(client, &ps8830_retimer_regmap); + if (IS_ERR(retimer->regmap)) { + ret =3D PTR_ERR(retimer->regmap); + dev_err(dev, "failed to allocate register map: %d\n", ret); + return ret; + } + + ret =3D ps8830_get_vregs(retimer); + if (ret) + return ret; + + retimer->xo_clk =3D 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 =3D devm_gpiod_get(dev, "reset", + skip_reset ? GPIOD_OUT_LOW : 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 =3D fwnode_typec_switch_get(dev->fwnode); + 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 =3D fwnode_typec_mux_get(dev->fwnode); + if (IS_ERR(retimer->typec_mux)) { + ret =3D dev_err_probe(dev, PTR_ERR(retimer->typec_mux), + "failed to acquire mode-mux\n"); + goto err_switch_put; + } + + sw_desc.drvdata =3D retimer; + sw_desc.fwnode =3D dev_fwnode(dev); + sw_desc.set =3D ps8830_sw_set; + + ret =3D drm_aux_bridge_register(dev); + if (ret) + goto err_mux_put; + + retimer->sw =3D typec_switch_register(dev, &sw_desc); + if (IS_ERR(retimer->sw)) { + ret =3D PTR_ERR(retimer->sw); + dev_err(dev, "failed to register typec switch: %d\n", ret); + goto err_aux_bridge_unregister; + } + + rtmr_desc.drvdata =3D retimer; + rtmr_desc.fwnode =3D dev_fwnode(dev); + rtmr_desc.set =3D ps8830_retimer_set; + + retimer->retimer =3D typec_retimer_register(dev, &rtmr_desc); + if (IS_ERR(retimer->retimer)) { + ret =3D PTR_ERR(retimer->retimer); + dev_err(dev, "failed to register typec retimer: %d\n", ret); + goto err_switch_unregister; + } + + ret =3D clk_prepare_enable(retimer->xo_clk); + if (ret) { + dev_err(dev, "failed to enable XO: %d\n", ret); + goto err_retimer_unregister; + } + + ret =3D ps8830_enable_vregs(retimer); + if (ret) + goto err_clk_disable; + + /* delay needed as per datasheet */ + usleep_range(4000, 14000); + + if (!skip_reset) + gpiod_set_value(retimer->reset_gpio, 0); + + 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: + if (!skip_reset) + gpiod_set_value(retimer->reset_gpio, 1); + + 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 =3D 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 ps8830_retimer_of_table[] =3D { + { .compatible =3D "parade,ps8830" }, + { } +}; +MODULE_DEVICE_TABLE(of, ps8830_retimer_of_table); + +static struct i2c_driver ps8830_retimer_driver =3D { + .driver =3D { + .name =3D "ps8830_retimer", + .of_match_table =3D ps8830_retimer_of_table, + }, + .probe =3D ps8830_retimer_probe, + .remove =3D ps8830_retimer_remove, +}; + +module_i2c_driver(ps8830_retimer_driver); + +MODULE_DESCRIPTION("Parade PS8830 Type-C Retimer driver"); +MODULE_LICENSE("GPL"); --=20 2.34.1