| Message ID | 20241024-tusb1046-v2-2-d031b1a43e6d@bootlin.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 7c561b8c3e83687064c957c394ed9fe49e38fe00 |
| Headers | show |
| Series | Add support for the TUSB1046-DCI Type-C crosspoint switch | expand |
On Thu, Oct 24, 2024 at 10:54:17AM +0200, Romain Gantois wrote: > The TUSB1046-DCI is a USB-C linear redriver crosspoint switch, which can > mux SuperSpeed lanes from a Type-C connector to a USB3.0 data lane or up to > 4 display port lanes. > > Add support for driving the TUSB1046 as a Type-C orientation switch and > DisplayPort altmode multiplexer. > > Signed-off-by: Romain Gantois <romain.gantois@bootlin.com> > --- > MAINTAINERS | 7 ++ > drivers/usb/typec/mux/Kconfig | 9 ++ > drivers/usb/typec/mux/Makefile | 1 + > drivers/usb/typec/mux/tusb1046.c | 196 +++++++++++++++++++++++++++++++++++++++ > 4 files changed, 213 insertions(+) > > diff --git a/MAINTAINERS b/MAINTAINERS > index c27f3190737f8b85779bde5489639c8b899f4fd8..c880588b63f27d628edeec09fa7d904eeabbde92 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -24142,6 +24142,13 @@ L: linux-usb@vger.kernel.org > S: Orphan > F: drivers/usb/typec/tcpm/ > > +USB TYPEC TUSB1046 MUX DRIVER > +M: Romain Gantois <romain.gantois@bootlin.com> > +L: linux-usb@vger.kernel.org > +S: Maintained > +F: Documentation/devicetree/bindings/usb/ti,tusb1046.yaml > +F: drivers/usb/typec/mux/tusb1046.c > + > USB UHCI DRIVER > M: Alan Stern <stern@rowland.harvard.edu> > L: linux-usb@vger.kernel.org > diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig > index ce7db6ad30572a0a74890f5f11944fb3ff07f635..67381b4ef4f68f4a6e73f157365ee24d0ab7109a 100644 > --- a/drivers/usb/typec/mux/Kconfig > +++ b/drivers/usb/typec/mux/Kconfig > @@ -66,6 +66,15 @@ config TYPEC_MUX_PTN36502 > Say Y or M if your system has a NXP PTN36502 Type-C redriver chip > found on some devices with a Type-C port. > > +config TYPEC_MUX_TUSB1046 > + tristate "TI TUSB1046 Type-C crosspoint switch driver" > + depends on I2C > + help > + Driver for the Texas Instruments TUSB1046-DCI crosspoint switch. > + Supports flipping USB-C SuperSpeed lanes to adapt to orientation > + changes, as well as muxing DisplayPort and sideband signals to a > + common Type-C connector. > + > config TYPEC_MUX_WCD939X_USBSS > tristate "Qualcomm WCD939x USBSS Analog Audio Switch driver" > depends on I2C > diff --git a/drivers/usb/typec/mux/Makefile b/drivers/usb/typec/mux/Makefile > index bb96f30267af05b33b9277dcf1cc0e1527d2dcdd..60879446da9365183567d3374a2fb7b5171fb3d7 100644 > --- a/drivers/usb/typec/mux/Makefile > +++ b/drivers/usb/typec/mux/Makefile > @@ -7,4 +7,5 @@ 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_PTN36502) += ptn36502.o > +obj-$(CONFIG_TYPEC_MUX_TUSB1046) += tusb1046.o > obj-$(CONFIG_TYPEC_MUX_WCD939X_USBSS) += wcd939x-usbss.o > diff --git a/drivers/usb/typec/mux/tusb1046.c b/drivers/usb/typec/mux/tusb1046.c > new file mode 100644 > index 0000000000000000000000000000000000000000..b4f45c217b59fe033551e8e6379ad2d33ebedbcb > --- /dev/null > +++ b/drivers/usb/typec/mux/tusb1046.c > @@ -0,0 +1,196 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Driver for the TUSB1046-DCI USB Type-C crosspoint switch > + * > + * Copyright (C) 2024 Bootlin > + */ > + > +#include <linux/bits.h> > +#include <linux/i2c.h> > +#include <linux/usb/typec_mux.h> > +#include <linux/usb/typec_dp.h> > +#include <linux/usb/typec_altmode.h> > +#include <linux/module.h> > +#include <linux/mod_devicetable.h> > +#include <linux/err.h> > +#include <linux/of_device.h> > +#include <linux/device.h> > +#include <linux/mutex.h> > + > +#define TUSB1046_REG_GENERAL 0xa > + > +/* General register bits */ > +#define TUSB1046_GENERAL_FLIPSEL BIT(2) > +#define TUSB1046_GENERAL_CTLSEL GENMASK(1, 0) > + > +/* Mux modes */ > +#define TUSB1046_CTLSEL_DISABLED 0x0 > +#define TUSB1046_CTLSEL_USB3 0x1 > +#define TUSB1046_CTLSEL_4LANE_DP 0x2 > +#define TUSB1046_CTLSEL_USB3_AND_2LANE_DP 0x3 > + > +struct tusb1046_priv { > + struct i2c_client *client; > + struct typec_switch_dev *sw; > + struct typec_mux_dev *mux; > + > + /* Lock General register during accesses */ > + struct mutex general_reg_lock; > +}; > + > +static int tusb1046_mux_set(struct typec_mux_dev *mux, > + struct typec_mux_state *state) > +{ > + struct tusb1046_priv *priv = typec_mux_get_drvdata(mux); > + struct i2c_client *client = priv->client; > + struct device *dev = &client->dev; > + int mode, val, ret = 0; > + > + if (state->mode >= TYPEC_STATE_MODAL && > + state->alt->svid != USB_TYPEC_DP_SID) > + return -EINVAL; > + > + dev_dbg(dev, "mux mode requested: %lu\n", state->mode); > + > + mutex_lock(&priv->general_reg_lock); > + > + val = i2c_smbus_read_byte_data(client, TUSB1046_REG_GENERAL); > + if (val < 0) { > + dev_err(dev, "failed to read ctlsel status, err %d\n", val); > + ret = val; > + goto out_unlock; > + } > + > + switch (state->mode) { > + case TYPEC_STATE_USB: > + mode = TUSB1046_CTLSEL_USB3; > + break; > + case TYPEC_DP_STATE_C: These are only valid if you have checked that altmode SVID is a DisplayPort SVID. > + case TYPEC_DP_STATE_E: > + mode = TUSB1046_CTLSEL_4LANE_DP; > + break; > + case TYPEC_DP_STATE_D: > + mode = TUSB1046_CTLSEL_USB3_AND_2LANE_DP; > + break; > + case TYPEC_STATE_SAFE: > + default: > + mode = TUSB1046_CTLSEL_DISABLED; > + break; > + } > + > + val &= ~TUSB1046_GENERAL_CTLSEL; > + val |= mode; > + > + ret = i2c_smbus_write_byte_data(client, TUSB1046_REG_GENERAL, val); > + > +out_unlock: > + mutex_unlock(&priv->general_reg_lock); > + return ret; > +} > +
Hello Dmitry, On vendredi 25 octobre 2024 08:39:54 UTC+2 Dmitry Baryshkov wrote: > On Thu, Oct 24, 2024 at 10:54:17AM +0200, Romain Gantois wrote: ... > > + > > +static int tusb1046_mux_set(struct typec_mux_dev *mux, > > + struct typec_mux_state *state) > > +{ > > + struct tusb1046_priv *priv = typec_mux_get_drvdata(mux); > > + struct i2c_client *client = priv->client; > > + struct device *dev = &client->dev; > > + int mode, val, ret = 0; > > + > > + if (state->mode >= TYPEC_STATE_MODAL && > > + state->alt->svid != USB_TYPEC_DP_SID) > > + return -EINVAL; > > + > > + dev_dbg(dev, "mux mode requested: %lu\n", state->mode); > > + > > + mutex_lock(&priv->general_reg_lock); > > + > > + val = i2c_smbus_read_byte_data(client, TUSB1046_REG_GENERAL); > > + if (val < 0) { > > + dev_err(dev, "failed to read ctlsel status, err %d\n", val); > > + ret = val; > > + goto out_unlock; > > + } > > + > > + switch (state->mode) { > > + case TYPEC_STATE_USB: > > + mode = TUSB1046_CTLSEL_USB3; > > + break; > > > + case TYPEC_DP_STATE_C: > These are only valid if you have checked that altmode SVID is a > DisplayPort SVID. I did check it near the beginning of the function didn't I? > > + if (state->mode >= TYPEC_STATE_MODAL && > > + state->alt->svid != USB_TYPEC_DP_SID) > > + return -EINVAL; Or is there something I'm missing? Thanks for the review,
On Fri, Oct 25, 2024 at 09:09:11AM +0200, Romain Gantois wrote: > Hello Dmitry, > > On vendredi 25 octobre 2024 08:39:54 UTC+2 Dmitry Baryshkov wrote: > > On Thu, Oct 24, 2024 at 10:54:17AM +0200, Romain Gantois wrote: > ... > > > + > > > +static int tusb1046_mux_set(struct typec_mux_dev *mux, > > > + struct typec_mux_state *state) > > > +{ > > > + struct tusb1046_priv *priv = typec_mux_get_drvdata(mux); > > > + struct i2c_client *client = priv->client; > > > + struct device *dev = &client->dev; > > > + int mode, val, ret = 0; > > > + > > > + if (state->mode >= TYPEC_STATE_MODAL && > > > + state->alt->svid != USB_TYPEC_DP_SID) > > > + return -EINVAL; > > > + > > > + dev_dbg(dev, "mux mode requested: %lu\n", state->mode); > > > + > > > + mutex_lock(&priv->general_reg_lock); > > > + > > > + val = i2c_smbus_read_byte_data(client, TUSB1046_REG_GENERAL); > > > + if (val < 0) { > > > + dev_err(dev, "failed to read ctlsel status, err %d\n", val); > > > + ret = val; > > > + goto out_unlock; > > > + } > > > + > > > + switch (state->mode) { > > > + case TYPEC_STATE_USB: > > > + mode = TUSB1046_CTLSEL_USB3; > > > + break; > > > > > + case TYPEC_DP_STATE_C: > > These are only valid if you have checked that altmode SVID is a > > DisplayPort SVID. > > I did check it near the beginning of the function didn't I? > > > > + if (state->mode >= TYPEC_STATE_MODAL && > > > + state->alt->svid != USB_TYPEC_DP_SID) > > > + return -EINVAL; > > Or is there something I'm missing? Indeed, excuse me. I missed it. Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> > > Thanks for the review, > > -- > Romain Gantois, Bootlin > Embedded Linux and Kernel engineering > https://bootlin.com > > >
On Thu, Oct 24, 2024 at 10:54:17AM +0200, Romain Gantois wrote: > The TUSB1046-DCI is a USB-C linear redriver crosspoint switch, which can > mux SuperSpeed lanes from a Type-C connector to a USB3.0 data lane or up to > 4 display port lanes. > > Add support for driving the TUSB1046 as a Type-C orientation switch and > DisplayPort altmode multiplexer. > > Signed-off-by: Romain Gantois <romain.gantois@bootlin.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> > --- > MAINTAINERS | 7 ++ > drivers/usb/typec/mux/Kconfig | 9 ++ > drivers/usb/typec/mux/Makefile | 1 + > drivers/usb/typec/mux/tusb1046.c | 196 +++++++++++++++++++++++++++++++++++++++ > 4 files changed, 213 insertions(+) > > diff --git a/MAINTAINERS b/MAINTAINERS > index c27f3190737f8b85779bde5489639c8b899f4fd8..c880588b63f27d628edeec09fa7d904eeabbde92 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -24142,6 +24142,13 @@ L: linux-usb@vger.kernel.org > S: Orphan > F: drivers/usb/typec/tcpm/ > > +USB TYPEC TUSB1046 MUX DRIVER > +M: Romain Gantois <romain.gantois@bootlin.com> > +L: linux-usb@vger.kernel.org > +S: Maintained > +F: Documentation/devicetree/bindings/usb/ti,tusb1046.yaml > +F: drivers/usb/typec/mux/tusb1046.c > + > USB UHCI DRIVER > M: Alan Stern <stern@rowland.harvard.edu> > L: linux-usb@vger.kernel.org > diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig > index ce7db6ad30572a0a74890f5f11944fb3ff07f635..67381b4ef4f68f4a6e73f157365ee24d0ab7109a 100644 > --- a/drivers/usb/typec/mux/Kconfig > +++ b/drivers/usb/typec/mux/Kconfig > @@ -66,6 +66,15 @@ config TYPEC_MUX_PTN36502 > Say Y or M if your system has a NXP PTN36502 Type-C redriver chip > found on some devices with a Type-C port. > > +config TYPEC_MUX_TUSB1046 > + tristate "TI TUSB1046 Type-C crosspoint switch driver" > + depends on I2C > + help > + Driver for the Texas Instruments TUSB1046-DCI crosspoint switch. > + Supports flipping USB-C SuperSpeed lanes to adapt to orientation > + changes, as well as muxing DisplayPort and sideband signals to a > + common Type-C connector. > + > config TYPEC_MUX_WCD939X_USBSS > tristate "Qualcomm WCD939x USBSS Analog Audio Switch driver" > depends on I2C > diff --git a/drivers/usb/typec/mux/Makefile b/drivers/usb/typec/mux/Makefile > index bb96f30267af05b33b9277dcf1cc0e1527d2dcdd..60879446da9365183567d3374a2fb7b5171fb3d7 100644 > --- a/drivers/usb/typec/mux/Makefile > +++ b/drivers/usb/typec/mux/Makefile > @@ -7,4 +7,5 @@ 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_PTN36502) += ptn36502.o > +obj-$(CONFIG_TYPEC_MUX_TUSB1046) += tusb1046.o > obj-$(CONFIG_TYPEC_MUX_WCD939X_USBSS) += wcd939x-usbss.o > diff --git a/drivers/usb/typec/mux/tusb1046.c b/drivers/usb/typec/mux/tusb1046.c > new file mode 100644 > index 0000000000000000000000000000000000000000..b4f45c217b59fe033551e8e6379ad2d33ebedbcb > --- /dev/null > +++ b/drivers/usb/typec/mux/tusb1046.c > @@ -0,0 +1,196 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Driver for the TUSB1046-DCI USB Type-C crosspoint switch > + * > + * Copyright (C) 2024 Bootlin > + */ > + > +#include <linux/bits.h> > +#include <linux/i2c.h> > +#include <linux/usb/typec_mux.h> > +#include <linux/usb/typec_dp.h> > +#include <linux/usb/typec_altmode.h> > +#include <linux/module.h> > +#include <linux/mod_devicetable.h> > +#include <linux/err.h> > +#include <linux/of_device.h> > +#include <linux/device.h> > +#include <linux/mutex.h> > + > +#define TUSB1046_REG_GENERAL 0xa > + > +/* General register bits */ > +#define TUSB1046_GENERAL_FLIPSEL BIT(2) > +#define TUSB1046_GENERAL_CTLSEL GENMASK(1, 0) > + > +/* Mux modes */ > +#define TUSB1046_CTLSEL_DISABLED 0x0 > +#define TUSB1046_CTLSEL_USB3 0x1 > +#define TUSB1046_CTLSEL_4LANE_DP 0x2 > +#define TUSB1046_CTLSEL_USB3_AND_2LANE_DP 0x3 > + > +struct tusb1046_priv { > + struct i2c_client *client; > + struct typec_switch_dev *sw; > + struct typec_mux_dev *mux; > + > + /* Lock General register during accesses */ > + struct mutex general_reg_lock; > +}; > + > +static int tusb1046_mux_set(struct typec_mux_dev *mux, > + struct typec_mux_state *state) > +{ > + struct tusb1046_priv *priv = typec_mux_get_drvdata(mux); > + struct i2c_client *client = priv->client; > + struct device *dev = &client->dev; > + int mode, val, ret = 0; > + > + if (state->mode >= TYPEC_STATE_MODAL && > + state->alt->svid != USB_TYPEC_DP_SID) > + return -EINVAL; > + > + dev_dbg(dev, "mux mode requested: %lu\n", state->mode); > + > + mutex_lock(&priv->general_reg_lock); > + > + val = i2c_smbus_read_byte_data(client, TUSB1046_REG_GENERAL); > + if (val < 0) { > + dev_err(dev, "failed to read ctlsel status, err %d\n", val); > + ret = val; > + goto out_unlock; > + } > + > + switch (state->mode) { > + case TYPEC_STATE_USB: > + mode = TUSB1046_CTLSEL_USB3; > + break; > + case TYPEC_DP_STATE_C: > + case TYPEC_DP_STATE_E: > + mode = TUSB1046_CTLSEL_4LANE_DP; > + break; > + case TYPEC_DP_STATE_D: > + mode = TUSB1046_CTLSEL_USB3_AND_2LANE_DP; > + break; > + case TYPEC_STATE_SAFE: > + default: > + mode = TUSB1046_CTLSEL_DISABLED; > + break; > + } > + > + val &= ~TUSB1046_GENERAL_CTLSEL; > + val |= mode; > + > + ret = i2c_smbus_write_byte_data(client, TUSB1046_REG_GENERAL, val); > + > +out_unlock: > + mutex_unlock(&priv->general_reg_lock); > + return ret; > +} > + > +static int tusb1046_switch_set(struct typec_switch_dev *sw, > + enum typec_orientation orientation) > +{ > + struct tusb1046_priv *priv = typec_switch_get_drvdata(sw); > + struct i2c_client *client = priv->client; > + struct device *dev = &client->dev; > + int val, ret = 0; > + > + dev_dbg(dev, "setting USB3.0 lane flip for orientation %d\n", orientation); > + > + mutex_lock(&priv->general_reg_lock); > + > + val = i2c_smbus_read_byte_data(client, TUSB1046_REG_GENERAL); > + if (val < 0) { > + dev_err(dev, "failed to read flipsel status, err %d\n", val); > + ret = val; > + goto out_unlock; > + } > + > + if (orientation == TYPEC_ORIENTATION_REVERSE) > + val |= TUSB1046_GENERAL_FLIPSEL; > + else > + val &= ~TUSB1046_GENERAL_FLIPSEL; > + > + ret = i2c_smbus_write_byte_data(client, TUSB1046_REG_GENERAL, val); > + > +out_unlock: > + mutex_unlock(&priv->general_reg_lock); > + return ret; > +} > + > +static int tusb1046_i2c_probe(struct i2c_client *client) > +{ > + struct typec_switch_desc sw_desc = { }; > + struct typec_mux_desc mux_desc = { }; > + struct device *dev = &client->dev; > + struct tusb1046_priv *priv; > + int ret = 0; > + > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > + if (!priv) > + return dev_err_probe(dev, -ENOMEM, "failed to allocate driver data\n"); > + > + priv->client = client; > + > + mutex_init(&priv->general_reg_lock); > + > + sw_desc.drvdata = priv; > + sw_desc.fwnode = dev_fwnode(dev); > + sw_desc.set = tusb1046_switch_set; > + > + priv->sw = typec_switch_register(dev, &sw_desc); > + if (IS_ERR(priv->sw)) { > + ret = dev_err_probe(dev, PTR_ERR(priv->sw), "failed to register type-c switch\n"); > + goto err_destroy_mutex; > + } > + > + mux_desc.drvdata = priv; > + mux_desc.fwnode = dev_fwnode(dev); > + mux_desc.set = tusb1046_mux_set; > + > + priv->mux = typec_mux_register(dev, &mux_desc); > + if (IS_ERR(priv->mux)) { > + ret = dev_err_probe(dev, PTR_ERR(priv->mux), "failed to register type-c mux\n"); > + goto err_unregister_switch; > + } > + > + i2c_set_clientdata(client, priv); > + > + return 0; > + > +err_unregister_switch: > + typec_switch_unregister(priv->sw); > +err_destroy_mutex: > + mutex_destroy(&priv->general_reg_lock); > + return ret; > +} > + > +static void tusb1046_i2c_remove(struct i2c_client *client) > +{ > + struct tusb1046_priv *priv = i2c_get_clientdata(client); > + > + typec_switch_unregister(priv->sw); > + typec_mux_unregister(priv->mux); > + mutex_destroy(&priv->general_reg_lock); > +} > + > +static const struct of_device_id tusb1046_match_table[] = { > + {.compatible = "ti,tusb1046"}, > + {}, > +}; > + > +static struct i2c_driver tusb1046_driver = { > + .driver = { > + .name = "tusb1046", > + .of_match_table = tusb1046_match_table, > + }, > + .probe = tusb1046_i2c_probe, > + .remove = tusb1046_i2c_remove, > +}; > + > +module_i2c_driver(tusb1046_driver); > + > +MODULE_DESCRIPTION("TUSB1046 USB Type-C switch driver"); > +MODULE_AUTHOR("Romain Gantois <romain.gantois@bootlin.com>"); > +MODULE_LICENSE("GPL"); > > -- > 2.47.0
diff --git a/MAINTAINERS b/MAINTAINERS index c27f3190737f8b85779bde5489639c8b899f4fd8..c880588b63f27d628edeec09fa7d904eeabbde92 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -24142,6 +24142,13 @@ L: linux-usb@vger.kernel.org S: Orphan F: drivers/usb/typec/tcpm/ +USB TYPEC TUSB1046 MUX DRIVER +M: Romain Gantois <romain.gantois@bootlin.com> +L: linux-usb@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/usb/ti,tusb1046.yaml +F: drivers/usb/typec/mux/tusb1046.c + USB UHCI DRIVER M: Alan Stern <stern@rowland.harvard.edu> L: linux-usb@vger.kernel.org diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig index ce7db6ad30572a0a74890f5f11944fb3ff07f635..67381b4ef4f68f4a6e73f157365ee24d0ab7109a 100644 --- a/drivers/usb/typec/mux/Kconfig +++ b/drivers/usb/typec/mux/Kconfig @@ -66,6 +66,15 @@ config TYPEC_MUX_PTN36502 Say Y or M if your system has a NXP PTN36502 Type-C redriver chip found on some devices with a Type-C port. +config TYPEC_MUX_TUSB1046 + tristate "TI TUSB1046 Type-C crosspoint switch driver" + depends on I2C + help + Driver for the Texas Instruments TUSB1046-DCI crosspoint switch. + Supports flipping USB-C SuperSpeed lanes to adapt to orientation + changes, as well as muxing DisplayPort and sideband signals to a + common Type-C connector. + config TYPEC_MUX_WCD939X_USBSS tristate "Qualcomm WCD939x USBSS Analog Audio Switch driver" depends on I2C diff --git a/drivers/usb/typec/mux/Makefile b/drivers/usb/typec/mux/Makefile index bb96f30267af05b33b9277dcf1cc0e1527d2dcdd..60879446da9365183567d3374a2fb7b5171fb3d7 100644 --- a/drivers/usb/typec/mux/Makefile +++ b/drivers/usb/typec/mux/Makefile @@ -7,4 +7,5 @@ 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_PTN36502) += ptn36502.o +obj-$(CONFIG_TYPEC_MUX_TUSB1046) += tusb1046.o obj-$(CONFIG_TYPEC_MUX_WCD939X_USBSS) += wcd939x-usbss.o diff --git a/drivers/usb/typec/mux/tusb1046.c b/drivers/usb/typec/mux/tusb1046.c new file mode 100644 index 0000000000000000000000000000000000000000..b4f45c217b59fe033551e8e6379ad2d33ebedbcb --- /dev/null +++ b/drivers/usb/typec/mux/tusb1046.c @@ -0,0 +1,196 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Driver for the TUSB1046-DCI USB Type-C crosspoint switch + * + * Copyright (C) 2024 Bootlin + */ + +#include <linux/bits.h> +#include <linux/i2c.h> +#include <linux/usb/typec_mux.h> +#include <linux/usb/typec_dp.h> +#include <linux/usb/typec_altmode.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/err.h> +#include <linux/of_device.h> +#include <linux/device.h> +#include <linux/mutex.h> + +#define TUSB1046_REG_GENERAL 0xa + +/* General register bits */ +#define TUSB1046_GENERAL_FLIPSEL BIT(2) +#define TUSB1046_GENERAL_CTLSEL GENMASK(1, 0) + +/* Mux modes */ +#define TUSB1046_CTLSEL_DISABLED 0x0 +#define TUSB1046_CTLSEL_USB3 0x1 +#define TUSB1046_CTLSEL_4LANE_DP 0x2 +#define TUSB1046_CTLSEL_USB3_AND_2LANE_DP 0x3 + +struct tusb1046_priv { + struct i2c_client *client; + struct typec_switch_dev *sw; + struct typec_mux_dev *mux; + + /* Lock General register during accesses */ + struct mutex general_reg_lock; +}; + +static int tusb1046_mux_set(struct typec_mux_dev *mux, + struct typec_mux_state *state) +{ + struct tusb1046_priv *priv = typec_mux_get_drvdata(mux); + struct i2c_client *client = priv->client; + struct device *dev = &client->dev; + int mode, val, ret = 0; + + if (state->mode >= TYPEC_STATE_MODAL && + state->alt->svid != USB_TYPEC_DP_SID) + return -EINVAL; + + dev_dbg(dev, "mux mode requested: %lu\n", state->mode); + + mutex_lock(&priv->general_reg_lock); + + val = i2c_smbus_read_byte_data(client, TUSB1046_REG_GENERAL); + if (val < 0) { + dev_err(dev, "failed to read ctlsel status, err %d\n", val); + ret = val; + goto out_unlock; + } + + switch (state->mode) { + case TYPEC_STATE_USB: + mode = TUSB1046_CTLSEL_USB3; + break; + case TYPEC_DP_STATE_C: + case TYPEC_DP_STATE_E: + mode = TUSB1046_CTLSEL_4LANE_DP; + break; + case TYPEC_DP_STATE_D: + mode = TUSB1046_CTLSEL_USB3_AND_2LANE_DP; + break; + case TYPEC_STATE_SAFE: + default: + mode = TUSB1046_CTLSEL_DISABLED; + break; + } + + val &= ~TUSB1046_GENERAL_CTLSEL; + val |= mode; + + ret = i2c_smbus_write_byte_data(client, TUSB1046_REG_GENERAL, val); + +out_unlock: + mutex_unlock(&priv->general_reg_lock); + return ret; +} + +static int tusb1046_switch_set(struct typec_switch_dev *sw, + enum typec_orientation orientation) +{ + struct tusb1046_priv *priv = typec_switch_get_drvdata(sw); + struct i2c_client *client = priv->client; + struct device *dev = &client->dev; + int val, ret = 0; + + dev_dbg(dev, "setting USB3.0 lane flip for orientation %d\n", orientation); + + mutex_lock(&priv->general_reg_lock); + + val = i2c_smbus_read_byte_data(client, TUSB1046_REG_GENERAL); + if (val < 0) { + dev_err(dev, "failed to read flipsel status, err %d\n", val); + ret = val; + goto out_unlock; + } + + if (orientation == TYPEC_ORIENTATION_REVERSE) + val |= TUSB1046_GENERAL_FLIPSEL; + else + val &= ~TUSB1046_GENERAL_FLIPSEL; + + ret = i2c_smbus_write_byte_data(client, TUSB1046_REG_GENERAL, val); + +out_unlock: + mutex_unlock(&priv->general_reg_lock); + return ret; +} + +static int tusb1046_i2c_probe(struct i2c_client *client) +{ + struct typec_switch_desc sw_desc = { }; + struct typec_mux_desc mux_desc = { }; + struct device *dev = &client->dev; + struct tusb1046_priv *priv; + int ret = 0; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return dev_err_probe(dev, -ENOMEM, "failed to allocate driver data\n"); + + priv->client = client; + + mutex_init(&priv->general_reg_lock); + + sw_desc.drvdata = priv; + sw_desc.fwnode = dev_fwnode(dev); + sw_desc.set = tusb1046_switch_set; + + priv->sw = typec_switch_register(dev, &sw_desc); + if (IS_ERR(priv->sw)) { + ret = dev_err_probe(dev, PTR_ERR(priv->sw), "failed to register type-c switch\n"); + goto err_destroy_mutex; + } + + mux_desc.drvdata = priv; + mux_desc.fwnode = dev_fwnode(dev); + mux_desc.set = tusb1046_mux_set; + + priv->mux = typec_mux_register(dev, &mux_desc); + if (IS_ERR(priv->mux)) { + ret = dev_err_probe(dev, PTR_ERR(priv->mux), "failed to register type-c mux\n"); + goto err_unregister_switch; + } + + i2c_set_clientdata(client, priv); + + return 0; + +err_unregister_switch: + typec_switch_unregister(priv->sw); +err_destroy_mutex: + mutex_destroy(&priv->general_reg_lock); + return ret; +} + +static void tusb1046_i2c_remove(struct i2c_client *client) +{ + struct tusb1046_priv *priv = i2c_get_clientdata(client); + + typec_switch_unregister(priv->sw); + typec_mux_unregister(priv->mux); + mutex_destroy(&priv->general_reg_lock); +} + +static const struct of_device_id tusb1046_match_table[] = { + {.compatible = "ti,tusb1046"}, + {}, +}; + +static struct i2c_driver tusb1046_driver = { + .driver = { + .name = "tusb1046", + .of_match_table = tusb1046_match_table, + }, + .probe = tusb1046_i2c_probe, + .remove = tusb1046_i2c_remove, +}; + +module_i2c_driver(tusb1046_driver); + +MODULE_DESCRIPTION("TUSB1046 USB Type-C switch driver"); +MODULE_AUTHOR("Romain Gantois <romain.gantois@bootlin.com>"); +MODULE_LICENSE("GPL");
The TUSB1046-DCI is a USB-C linear redriver crosspoint switch, which can mux SuperSpeed lanes from a Type-C connector to a USB3.0 data lane or up to 4 display port lanes. Add support for driving the TUSB1046 as a Type-C orientation switch and DisplayPort altmode multiplexer. Signed-off-by: Romain Gantois <romain.gantois@bootlin.com> --- MAINTAINERS | 7 ++ drivers/usb/typec/mux/Kconfig | 9 ++ drivers/usb/typec/mux/Makefile | 1 + drivers/usb/typec/mux/tusb1046.c | 196 +++++++++++++++++++++++++++++++++++++++ 4 files changed, 213 insertions(+)