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 <abel.vesa@xxxxxxxxxx>
---
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 <drm/bridge/aux-bridge.h>
+#include <linux/clk.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/usb/typec_altmode.h>
+#include <linux/usb/typec_dp.h>
+#include <linux/usb/typec_mux.h>
+#include <linux/usb/typec_retimer.h>
+
+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");
--
2.34.1
