Add a driver for the Pericom PI3USB30532 Type-C cross switch / mux chip found on some devices with a Type-C port. Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> --- drivers/mux/Kconfig | 10 +++++ drivers/mux/Makefile | 2 + drivers/mux/pi3usb30532.c | 97 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 109 insertions(+) create mode 100644 drivers/mux/pi3usb30532.c diff --git a/drivers/mux/Kconfig b/drivers/mux/Kconfig index 17938918bf93..19a3065c34e6 100644 --- a/drivers/mux/Kconfig +++ b/drivers/mux/Kconfig @@ -58,4 +58,14 @@ config MUX_MMIO To compile the driver as a module, choose M here: the module will be called mux-mmio. +config MUX_PI3USB30532 + tristate "Pericom PI3USB30532 Type-C cross switch driver" + depends on I2C + help + This driver adds support for the Pericom PI3USB30532 Type-C cross + switch / mux chip found on some devices with a Type-C port. + + To compile the driver as a module, choose M here: the module will + be called mux-pi3usb30532. + endmenu diff --git a/drivers/mux/Makefile b/drivers/mux/Makefile index a12e812c7966..7563dbf04593 100644 --- a/drivers/mux/Makefile +++ b/drivers/mux/Makefile @@ -7,9 +7,11 @@ mux-adg792a-objs := adg792a.o mux-gpio-objs := gpio.o mux-mmio-objs := mmio.o mux-intel_cht_usb_mux-objs := intel_cht_usb_mux.o +mux-pi3usb30532-objs := pi3usb30532.o obj-$(CONFIG_MULTIPLEXER) += mux-core.o obj-$(CONFIG_MUX_ADG792A) += mux-adg792a.o obj-$(CONFIG_MUX_GPIO) += mux-gpio.o obj-$(CONFIG_MUX_MMIO) += mux-mmio.o obj-$(CONFIG_MUX_CHT_USB_MUX) += mux-intel_cht_usb_mux.o +obj-$(CONFIG_MUX_PI3USB30532) += mux-pi3usb30532.o diff --git a/drivers/mux/pi3usb30532.c b/drivers/mux/pi3usb30532.c new file mode 100644 index 000000000000..fa8abd851520 --- /dev/null +++ b/drivers/mux/pi3usb30532.c @@ -0,0 +1,97 @@ +/* + * Pericom PI3USB30532 Type-C cross switch / mux driver + * + * Copyright (c) 2017 Hans de Goede <hdegoede@xxxxxxxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation, or (at your option) + * any later version. + */ + +#include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mux/consumer.h> /* For the MUX_USB_* defines */ +#include <linux/mux/driver.h> + +#define PI3USB30532_CONF 0x00 + +#define PI3USB30532_CONF_OPEN 0x00 +#define PI3USB30532_CONF_SWAP 0x01 +#define PI3USB30532_CONF_4LANE_DP 0x02 +#define PI3USB30532_CONF_USB3 0x04 +#define PI3USB30532_CONF_USB3_AND_2LANE_DP 0x06 + +struct pi3usb30532_mux { + struct i2c_client *client; +}; + +static int pi3usb30532_mux_set_mux(struct mux_control *mux_ctrl, int state) +{ + struct pi3usb30532_mux *mux = mux_chip_priv(mux_ctrl->chip); + u8 conf = PI3USB30532_CONF_OPEN; + + switch (state & ~MUX_USB_POLARITY_INV) { + case MUX_USB_NONE: + conf = PI3USB30532_CONF_OPEN; + break; + case MUX_USB_DEVICE: + case MUX_USB_HOST: + conf = PI3USB30532_CONF_USB3; + break; + case MUX_USB_HOST_AND_DP_SRC: + conf = PI3USB30532_CONF_USB3_AND_2LANE_DP; + break; + case MUX_USB_DP_SRC: + conf = PI3USB30532_CONF_4LANE_DP; + break; + } + + if (state & MUX_USB_POLARITY_INV) + conf |= PI3USB30532_CONF_SWAP; + + return i2c_smbus_write_byte_data(mux->client, PI3USB30532_CONF, conf); +} + +static const struct mux_control_ops pi3usb30532_mux_ops = { + .set = pi3usb30532_mux_set_mux, +}; + +static int pi3usb30532_mux_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct pi3usb30532_mux *mux; + struct mux_chip *mux_chip; + + mux_chip = devm_mux_chip_alloc(dev, 1, sizeof(*mux)); + if (IS_ERR(mux_chip)) + return PTR_ERR(mux_chip); + + mux_chip->ops = &pi3usb30532_mux_ops; + mux_chip->mux[0].states = MUX_USB_STATES; + mux = mux_chip_priv(mux_chip); + mux->client = client; + + return devm_mux_chip_register(dev, mux_chip); +} + +static const struct i2c_device_id pi3usb30532_mux_table[] = { + { "pi3usb30532" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, pi3usb30532_mux_table); + +static struct i2c_driver pi3usb30532_mux_driver = { + .driver = { + .name = "pi3usb30532", + }, + .probe_new = pi3usb30532_mux_probe, + .id_table = pi3usb30532_mux_table, +}; + +module_i2c_driver(pi3usb30532_mux_driver); + +MODULE_AUTHOR("Hans de Goede <hdegoede@xxxxxxxxxx>"); +MODULE_DESCRIPTION("Pericom PI3USB30532 Type-C mux driver"); +MODULE_LICENSE("GPL"); -- 2.13.5 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html