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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 - USB3 - DP 2lanes + USB3 Signed-off-by: Abel Vesa --- drivers/usb/typec/mux/Kconfig | 10 ++ drivers/usb/typec/mux/Makefile | 1 + drivers/usb/typec/mux/ps8830.c | 347 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 358 insertions(+) diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig index ce7db6ad3057..48613b67f1c5 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 bb96f30267af..4b23b12cfe45 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 000000000000..517ccac5932f --- /dev/null +++ b/drivers/usb/typec/mux/ps8830.c @@ -0,0 +1,347 @@ +// 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 regulator_bulk_data supplies[4]; + struct gpio_desc *reset_gpio; + struct regmap *regmap; + struct typec_switch_dev *sw; + struct typec_retimer *retimer; + struct clk *xo_clk; + + bool needs_update; + 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 int ps8830_configure(struct ps8830_retimer *retimer, int cfg0, int cfg1, int cfg2) +{ + if (cfg0 == retimer->cfg[0] && + cfg1 == retimer->cfg[1] && + cfg2 == retimer->cfg[2]) + return 0; + + 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); + + return 0; +} + +static int ps8380_set(struct ps8830_retimer *retimer) +{ + int cfg0 = 0x00, cfg1 = 0x00, cfg2 = 0x00; + int ret; + + retimer->needs_update = false; + + switch (retimer->orientation) { + /* Safe mode */ + case TYPEC_ORIENTATION_NONE: + cfg0 = 0x01; + cfg1 = 0x00; + cfg2 = 0x00; + break; + case TYPEC_ORIENTATION_NORMAL: + cfg0 = 0x01; + break; + case TYPEC_ORIENTATION_REVERSE: + cfg0 = 0x03; + break; + } + + switch (retimer->mode) { + /* Safe mode */ + case TYPEC_STATE_SAFE: + cfg0 = 0x01; + cfg1 = 0x00; + cfg2 = 0x00; + break; + + /* USB3 Only */ + case TYPEC_STATE_USB: + cfg0 |= 0x20; + break; + + /* DP Only */ + case TYPEC_DP_STATE_C: + case TYPEC_DP_STATE_E: + cfg0 &= 0x0f; + cfg1 = 0x85; + break; + + /* DP + USB */ + case TYPEC_DP_STATE_D: + case TYPEC_DP_STATE_F: + cfg0 |= 0x20; + cfg1 = 0x85; + break; + + default: + return -EOPNOTSUPP; + } + + gpiod_set_value(retimer->reset_gpio, 0); + msleep(20); + gpiod_set_value(retimer->reset_gpio, 1); + + msleep(60); + + ret = ps8830_configure(retimer, 0x01, 0x00, 0x00); + + msleep(30); + + return ps8830_configure(retimer, cfg0, cfg1, cfg2); +} + +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; + retimer->needs_update = true; + } + + if (retimer->needs_update) + 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; + retimer->needs_update = true; + } + + if (retimer->needs_update) + 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 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; + + 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); + } + + retimer->supplies[0].supply = "vdd33"; + retimer->supplies[1].supply = "vdd18"; + retimer->supplies[2].supply = "vdd15"; + retimer->supplies[3].supply = "vcc"; + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(retimer->supplies), + retimer->supplies); + if (ret) + return ret; + + retimer->xo_clk = devm_clk_get(dev, "xo"); + if (IS_ERR(retimer->xo_clk)) + return PTR_ERR(retimer->xo_clk); + + retimer->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(retimer->reset_gpio)) + return PTR_ERR(retimer->reset_gpio); + + retimer->typec_switch = 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 = fwnode_typec_mux_get(dev->fwnode); + 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 = regulator_bulk_enable(ARRAY_SIZE(retimer->supplies), + retimer->supplies); + if (ret < 0) { + dev_err(dev, "cannot enable regulators %d\n", 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_disable_vreg; + } + + gpiod_set_value(retimer->reset_gpio, 0); + msleep(20); + gpiod_set_value(retimer->reset_gpio, 1); + + msleep(60); + mutex_init(&retimer->lock); + + 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_disable_gpio; + + retimer->sw = typec_switch_register(dev, &sw_desc); + if (IS_ERR(retimer->sw)) { + ret = dev_err_probe(dev, PTR_ERR(retimer->sw), + "Error registering typec switch\n"); + goto err_disable_gpio; + } + + 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)) { + ret = dev_err_probe(dev, PTR_ERR(retimer->retimer), + "Error registering typec retimer\n"); + goto err_switch_unregister; + } + + dev_info(dev, "Registered Parade PS8830 retimer\n"); + return 0; + +err_switch_unregister: + typec_switch_unregister(retimer->sw); + +err_disable_gpio: + gpiod_set_value(retimer->reset_gpio, 0); + clk_disable_unprepare(retimer->xo_clk); + +err_disable_vreg: + regulator_bulk_disable(ARRAY_SIZE(retimer->supplies), + retimer->supplies); +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); + + clk_disable_unprepare(retimer->xo_clk); + + regulator_bulk_disable(ARRAY_SIZE(retimer->supplies), + retimer->supplies); + + typec_mux_put(retimer->typec_mux); + typec_switch_put(retimer->typec_switch); +} + +static const struct i2c_device_id ps8830_retimer_table[] = { + { "parade,ps8830" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ps8830_retimer_table); + +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, + .id_table = ps8830_retimer_table, +}; + +module_i2c_driver(ps8830_retimer_driver); + +MODULE_DESCRIPTION("Parade PS8830 Type-C Retimer driver"); +MODULE_LICENSE("GPL");