* [PATCH v3 0/2] Add ITE IT5205 Passive MUX @ 2024-01-22 11:04 AngeloGioacchino Del Regno 2024-01-22 11:04 ` [PATCH v3 1/2] dt-bindings: usb: Introduce ITE IT5205 Alt. Mode " AngeloGioacchino Del Regno 2024-01-22 11:04 ` [PATCH v3 2/2] usb: typec: mux: Add ITE IT5205 Alternate Mode Passive MUX driver AngeloGioacchino Del Regno 0 siblings, 2 replies; 5+ messages in thread From: AngeloGioacchino Del Regno @ 2024-01-22 11:04 UTC (permalink / raw) To: gregkh Cc: robh+dt, krzysztof.kozlowski+dt, conor+dt, heikki.krogerus, matthias.bgg, dmitry.baryshkov, neil.armstrong, andersson, nathan, luca.weiss, tianping.fang, linux-usb, devicetree, linux-kernel, linux-arm-kernel, linux-mediatek, kernel, AngeloGioacchino Del Regno This series adds a driver for the ITE IT5205/FN, found on various MediaTek board designs, including the MT8395Genio 1200 EVB and others following that. Changes in v3: - Fixed MODULE_DEVICE_TABLE for it5205_of_table Changes in v2: - Reordered headers and removed unused ones - Added a check for altmode in it5205_mux_set() AngeloGioacchino Del Regno (2): dt-bindings: usb: Introduce ITE IT5205 Alt. Mode Passive MUX usb: typec: mux: Add ITE IT5205 Alternate Mode Passive MUX driver .../devicetree/bindings/usb/ite,it5205.yaml | 72 +++++ drivers/usb/typec/mux/Kconfig | 10 + drivers/usb/typec/mux/Makefile | 1 + drivers/usb/typec/mux/it5205.c | 294 ++++++++++++++++++ 4 files changed, 377 insertions(+) create mode 100644 Documentation/devicetree/bindings/usb/ite,it5205.yaml create mode 100644 drivers/usb/typec/mux/it5205.c -- 2.43.0 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH v3 1/2] dt-bindings: usb: Introduce ITE IT5205 Alt. Mode Passive MUX 2024-01-22 11:04 [PATCH v3 0/2] Add ITE IT5205 Passive MUX AngeloGioacchino Del Regno @ 2024-01-22 11:04 ` AngeloGioacchino Del Regno 2024-01-23 17:25 ` Conor Dooley 2024-01-22 11:04 ` [PATCH v3 2/2] usb: typec: mux: Add ITE IT5205 Alternate Mode Passive MUX driver AngeloGioacchino Del Regno 1 sibling, 1 reply; 5+ messages in thread From: AngeloGioacchino Del Regno @ 2024-01-22 11:04 UTC (permalink / raw) To: gregkh Cc: robh+dt, krzysztof.kozlowski+dt, conor+dt, heikki.krogerus, matthias.bgg, dmitry.baryshkov, neil.armstrong, andersson, nathan, luca.weiss, tianping.fang, linux-usb, devicetree, linux-kernel, linux-arm-kernel, linux-mediatek, kernel, AngeloGioacchino Del Regno Introduce a binding for the ITE IT5205 Alternate Mode Passive MUX, used for connecting, disconnecting and switching orientation and control the SBU signals for alternate modes on USB Type-C ports. Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- .../devicetree/bindings/usb/ite,it5205.yaml | 72 +++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 Documentation/devicetree/bindings/usb/ite,it5205.yaml diff --git a/Documentation/devicetree/bindings/usb/ite,it5205.yaml b/Documentation/devicetree/bindings/usb/ite,it5205.yaml new file mode 100644 index 000000000000..36ec4251b5f2 --- /dev/null +++ b/Documentation/devicetree/bindings/usb/ite,it5205.yaml @@ -0,0 +1,72 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/usb/ite,it5205.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ITE IT5202 Type-C USB Alternate Mode Passive MUX + +maintainers: + - AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> + - Tianping Fang <tianping.fang@mediatek.com> + +properties: + compatible: + const: ite,it5205 + + reg: + maxItems: 1 + + vcc-supply: + description: Power supply for VCC pin (3.3V) + + mode-switch: + description: Flag the port as possible handle of altmode switching + type: boolean + + orientation-switch: + description: Flag the port as possible handler of orientation switching + type: boolean + + ite,ovp-enable: + description: Enable Over Voltage Protection functionality + type: boolean + + port: + $ref: /schemas/graph.yaml#/properties/port + description: + A port node to link the IT5205 to a TypeC controller for the purpose of + handling altmode muxing and orientation switching. + +required: + - compatible + - reg + - orientation-switch + - port + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + i2c2 { + #address-cells = <1>; + #size-cells = <0>; + + typec-mux@48 { + compatible = "ite,it5205"; + reg = <0x48>; + + mode-switch; + orientation-switch; + + vcc-supply = <&mt6359_vibr_ldo_reg>; + + port { + it5205_usbss_sbu: endpoint { + remote-endpoint = <&typec_controller>; + }; + }; + }; + }; +... -- 2.43.0 ^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH v3 1/2] dt-bindings: usb: Introduce ITE IT5205 Alt. Mode Passive MUX 2024-01-22 11:04 ` [PATCH v3 1/2] dt-bindings: usb: Introduce ITE IT5205 Alt. Mode " AngeloGioacchino Del Regno @ 2024-01-23 17:25 ` Conor Dooley 0 siblings, 0 replies; 5+ messages in thread From: Conor Dooley @ 2024-01-23 17:25 UTC (permalink / raw) To: AngeloGioacchino Del Regno Cc: gregkh, robh+dt, krzysztof.kozlowski+dt, conor+dt, heikki.krogerus, matthias.bgg, dmitry.baryshkov, neil.armstrong, andersson, nathan, luca.weiss, tianping.fang, linux-usb, devicetree, linux-kernel, linux-arm-kernel, linux-mediatek, kernel [-- Attachment #1: Type: text/plain, Size: 451 bytes --] On Mon, Jan 22, 2024 at 12:04:45PM +0100, AngeloGioacchino Del Regno wrote: > Introduce a binding for the ITE IT5205 Alternate Mode Passive MUX, > used for connecting, disconnecting and switching orientation and > control the SBU signals for alternate modes on USB Type-C ports. > > Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Cheers, Conor. [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 228 bytes --] ^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH v3 2/2] usb: typec: mux: Add ITE IT5205 Alternate Mode Passive MUX driver 2024-01-22 11:04 [PATCH v3 0/2] Add ITE IT5205 Passive MUX AngeloGioacchino Del Regno 2024-01-22 11:04 ` [PATCH v3 1/2] dt-bindings: usb: Introduce ITE IT5205 Alt. Mode " AngeloGioacchino Del Regno @ 2024-01-22 11:04 ` AngeloGioacchino Del Regno 2024-01-24 13:43 ` Heikki Krogerus 1 sibling, 1 reply; 5+ messages in thread From: AngeloGioacchino Del Regno @ 2024-01-22 11:04 UTC (permalink / raw) To: gregkh Cc: robh+dt, krzysztof.kozlowski+dt, conor+dt, heikki.krogerus, matthias.bgg, dmitry.baryshkov, neil.armstrong, andersson, nathan, luca.weiss, tianping.fang, linux-usb, devicetree, linux-kernel, linux-arm-kernel, linux-mediatek, kernel, AngeloGioacchino Del Regno The ITE IT5202 is a USB Type-C Alternate Mode Passive MUX, used for muxing the SBU lines of a Type-C port with DisplayPort altmode and also providing an orientation switch. Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- drivers/usb/typec/mux/Kconfig | 10 ++ drivers/usb/typec/mux/Makefile | 1 + drivers/usb/typec/mux/it5205.c | 294 +++++++++++++++++++++++++++++++++ 3 files changed, 305 insertions(+) create mode 100644 drivers/usb/typec/mux/it5205.c diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig index d2cb5e733e57..399c7b0983df 100644 --- a/drivers/usb/typec/mux/Kconfig +++ b/drivers/usb/typec/mux/Kconfig @@ -36,6 +36,16 @@ config TYPEC_MUX_INTEL_PMC control the USB role switch and also the multiplexer/demultiplexer switches used with USB Type-C Alternate Modes. +config TYPEC_MUX_IT5205 + tristate "ITE IT5205 Type-C USB Alt Mode Passive MUX driver" + depends on I2C + select REGMAP_I2C + help + Driver for the ITE IT5205 Type-C USB Alternate Mode Passive MUX + which provides support for muxing DisplayPort and sideband signals + on a common USB Type-C connector. + If compiled as a module, the module will be named it5205. + config TYPEC_MUX_NB7VPQ904M tristate "On Semiconductor NB7VPQ904M Type-C redriver driver" depends on I2C diff --git a/drivers/usb/typec/mux/Makefile b/drivers/usb/typec/mux/Makefile index 57dc9ac6f8dc..bb96f30267af 100644 --- a/drivers/usb/typec/mux/Makefile +++ b/drivers/usb/typec/mux/Makefile @@ -4,6 +4,7 @@ obj-$(CONFIG_TYPEC_MUX_FSA4480) += fsa4480.o obj-$(CONFIG_TYPEC_MUX_GPIO_SBU) += gpio-sbu-mux.o obj-$(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_PTN36502) += ptn36502.o obj-$(CONFIG_TYPEC_MUX_WCD939X_USBSS) += wcd939x-usbss.o diff --git a/drivers/usb/typec/mux/it5205.c b/drivers/usb/typec/mux/it5205.c new file mode 100644 index 000000000000..5535932e42cd --- /dev/null +++ b/drivers/usb/typec/mux/it5205.c @@ -0,0 +1,294 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ITE IT5205 Type-C USB alternate mode passive mux + * + * Copyright (c) 2020 MediaTek Inc. + * Copyright (c) 2024 Collabora Ltd. + * AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> + * + */ + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/usb/tcpm.h> +#include <linux/usb/typec.h> +#include <linux/usb/typec_dp.h> +#include <linux/usb/typec_mux.h> + +#define IT5205_REG_CHIP_ID(x) (0x4 + (x)) +#define IT5205FN_CHIP_ID 0x35323035 /* "5205" */ + +/* MUX power down register */ +#define IT5205_REG_MUXPDR 0x10 +#define IT5205_MUX_POWER_DOWN BIT(0) + +/* MUX control register */ +#define IT5205_REG_MUXCR 0x11 +#define IT5205_POLARITY_INVERTED BIT(4) +#define IT5205_DP_USB_CTRL_MASK GENMASK(3, 0) +#define IT5205_DP 0x0f +#define IT5205_DP_USB 0x03 +#define IT5205_USB 0x07 + +/* Vref Select Register */ +#define IT5205_REG_VSR 0x10 +#define IT5205_VREF_SELECT_MASK GENMASK(5, 4) +#define IT5205_VREF_SELECT_3_3V 0x00 +#define IT5205_VREF_SELECT_OFF 0x20 + +/* CSBU Over Voltage Protection Register */ +#define IT5205_REG_CSBUOVPSR 0x1e +#define IT5205_OVP_SELECT_MASK GENMASK(5, 4) +#define IT5205_OVP_3_90V 0x00 +#define IT5205_OVP_3_68V 0x10 +#define IT5205_OVP_3_62V 0x20 +#define IT5205_OVP_3_57V 0x30 + +/* CSBU Switch Register */ +#define IT5205_REG_CSBUSR 0x22 +#define IT5205_CSBUSR_SWITCH BIT(0) + +/* Interrupt Switch Register */ +#define IT5205_REG_ISR 0x25 +#define IT5205_ISR_CSBU_MASK BIT(4) +#define IT5205_ISR_CSBU_OVP BIT(0) + +struct it5205 { + struct i2c_client *client; + struct regmap *regmap; + struct typec_switch_dev *sw; + struct typec_mux_dev *mux; +}; + +static int it5205_switch_set(struct typec_switch_dev *sw, enum typec_orientation orientation) +{ + struct it5205 *it = typec_switch_get_drvdata(sw); + + switch (orientation) { + case TYPEC_ORIENTATION_NORMAL: + regmap_update_bits(it->regmap, IT5205_REG_MUXCR, + IT5205_POLARITY_INVERTED, 0); + break; + case TYPEC_ORIENTATION_REVERSE: + regmap_update_bits(it->regmap, IT5205_REG_MUXCR, + IT5205_POLARITY_INVERTED, IT5205_POLARITY_INVERTED); + break; + case TYPEC_ORIENTATION_NONE: + fallthrough; + default: + regmap_write(it->regmap, IT5205_REG_MUXCR, 0); + break; + } + + return 0; +} + +static int it5205_mux_set(struct typec_mux_dev *mux, struct typec_mux_state *state) +{ + struct it5205 *it = typec_mux_get_drvdata(mux); + u8 val; + + if (state->mode >= TYPEC_STATE_MODAL && + state->alt->svid != USB_TYPEC_DP_SID) + return -EINVAL; + + switch (state->mode) { + case TYPEC_STATE_USB: + val = IT5205_USB; + break; + case TYPEC_DP_STATE_C: + fallthrough; + case TYPEC_DP_STATE_E: + val = IT5205_DP; + break; + case TYPEC_DP_STATE_D: + val = IT5205_DP_USB; + break; + case TYPEC_STATE_SAFE: + fallthrough; + default: + val = 0; + break; + } + + return regmap_update_bits(it->regmap, IT5205_REG_MUXCR, + IT5205_DP_USB_CTRL_MASK, val); +} + +static irqreturn_t it5205_irq_handler(int irq, void *data) +{ + struct it5205 *it = data; + int ret; + u32 val; + + ret = regmap_read(it->regmap, IT5205_REG_ISR, &val); + if (ret) + return IRQ_NONE; + + if (val & IT5205_ISR_CSBU_OVP) { + dev_warn(&it->client->dev, "Overvoltage detected!\n"); + + /* Reset CSBU */ + regmap_update_bits(it->regmap, IT5205_REG_CSBUSR, + IT5205_CSBUSR_SWITCH, 0); + regmap_update_bits(it->regmap, IT5205_REG_CSBUSR, + IT5205_CSBUSR_SWITCH, IT5205_CSBUSR_SWITCH); + } + + return IRQ_HANDLED; +} + +static void it5205_enable_ovp(struct it5205 *it) +{ + /* Select Vref 3.3v */ + regmap_update_bits(it->regmap, IT5205_REG_VSR, + IT5205_VREF_SELECT_MASK, IT5205_VREF_SELECT_3_3V); + + /* Trigger OVP at 3.68V */ + regmap_update_bits(it->regmap, IT5205_REG_CSBUOVPSR, + IT5205_OVP_SELECT_MASK, IT5205_OVP_3_68V); + + /* Unmask OVP interrupt */ + regmap_update_bits(it->regmap, IT5205_REG_ISR, + IT5205_ISR_CSBU_MASK, 0); + + /* Enable CSBU Interrupt */ + regmap_update_bits(it->regmap, IT5205_REG_CSBUSR, + IT5205_CSBUSR_SWITCH, IT5205_CSBUSR_SWITCH); +} + +static const struct regmap_config it5205_regmap = { + .max_register = 0x2f, + .reg_bits = 8, + .val_bits = 8, +}; + +static int it5205_probe(struct i2c_client *client) +{ + struct typec_switch_desc sw_desc = { }; + struct typec_mux_desc mux_desc = { }; + struct device *dev = &client->dev; + struct it5205 *it; + u32 val, chipid = 0; + int i, ret; + + it = devm_kzalloc(dev, sizeof(*it), GFP_KERNEL); + if (!it) + return -ENOMEM; + + ret = devm_regulator_get_enable(dev, "vcc"); + if (ret) + return dev_err_probe(dev, ret, "Failed to get regulator\n"); + + it->client = client; + + it->regmap = devm_regmap_init_i2c(client, &it5205_regmap); + if (IS_ERR(it->regmap)) + return dev_err_probe(dev, PTR_ERR(it->regmap), + "Failed to init regmap\n"); + + /* IT5205 needs a long time to power up after enabling regulator */ + msleep(50); + + /* Unset poweroff bit */ + ret = regmap_write(it->regmap, IT5205_REG_MUXPDR, 0); + if (ret) + return dev_err_probe(dev, ret, "Failed to set power on\n"); + + /* Read the 32 bits ChipID */ + for (i = 3; i >= 0; i--) { + ret = regmap_read(it->regmap, IT5205_REG_CHIP_ID(i), &val); + if (ret) + return ret; + + chipid |= val << (i * 8); + } + + if (chipid != IT5205FN_CHIP_ID) + return dev_err_probe(dev, -EINVAL, + "Unknown ChipID 0x%x\n", chipid); + + /* Initialize as USB mode with default (non-inverted) polarity */ + ret = regmap_write(it->regmap, IT5205_REG_MUXCR, IT5205_USB); + if (ret) + return dev_err_probe(dev, ret, "Cannot set mode to USB\n"); + + sw_desc.drvdata = it; + sw_desc.fwnode = dev_fwnode(dev); + sw_desc.set = it5205_switch_set; + + it->sw = typec_switch_register(dev, &sw_desc); + if (IS_ERR(it->sw)) + return dev_err_probe(dev, PTR_ERR(it->sw), + "failed to register typec switch\n"); + + mux_desc.drvdata = it; + mux_desc.fwnode = dev_fwnode(dev); + mux_desc.set = it5205_mux_set; + + it->mux = typec_mux_register(dev, &mux_desc); + if (IS_ERR(it->mux)) { + typec_switch_unregister(it->sw); + return dev_err_probe(dev, PTR_ERR(it->mux), + "failed to register typec mux\n"); + } + + i2c_set_clientdata(client, it); + + if (of_property_read_bool(dev->of_node, "ite,ovp-enable") && client->irq) { + it5205_enable_ovp(it); + + ret = devm_request_threaded_irq(dev, client->irq, NULL, + it5205_irq_handler, + IRQF_ONESHOT, dev_name(dev), it); + if (ret) { + typec_mux_unregister(it->mux); + typec_switch_unregister(it->sw); + return dev_err_probe(dev, ret, "Failed to request irq\n"); + } + } + + return 0; +} + +static void it5205_remove(struct i2c_client *client) +{ + struct it5205 *it = i2c_get_clientdata(client); + + typec_mux_unregister(it->mux); + typec_switch_unregister(it->sw); +} + +static const struct i2c_device_id it5205_table[] = { + { "it5205" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(i2c, it5205_table); + +static const struct of_device_id it5205_of_table[] = { + { .compatible = "ite,it5205" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, it5205_of_table); + +static struct i2c_driver it5205_driver = { + .driver = { + .name = "it5205", + .of_match_table = it5205_of_table, + }, + .probe = it5205_probe, + .remove = it5205_remove, + .id_table = it5205_table, +}; +module_i2c_driver(it5205_driver); + +MODULE_AUTHOR("Tianping Fang <tianping.fang@mediatek.com>"); +MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>"); +MODULE_DESCRIPTION("ITE IT5205 alternate mode passive MUX driver"); +MODULE_LICENSE("GPL"); -- 2.43.0 ^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH v3 2/2] usb: typec: mux: Add ITE IT5205 Alternate Mode Passive MUX driver 2024-01-22 11:04 ` [PATCH v3 2/2] usb: typec: mux: Add ITE IT5205 Alternate Mode Passive MUX driver AngeloGioacchino Del Regno @ 2024-01-24 13:43 ` Heikki Krogerus 0 siblings, 0 replies; 5+ messages in thread From: Heikki Krogerus @ 2024-01-24 13:43 UTC (permalink / raw) To: AngeloGioacchino Del Regno Cc: gregkh, robh+dt, krzysztof.kozlowski+dt, conor+dt, matthias.bgg, dmitry.baryshkov, neil.armstrong, andersson, nathan, luca.weiss, tianping.fang, linux-usb, devicetree, linux-kernel, linux-arm-kernel, linux-mediatek, kernel On Mon, Jan 22, 2024 at 12:04:46PM +0100, AngeloGioacchino Del Regno wrote: > The ITE IT5202 is a USB Type-C Alternate Mode Passive MUX, used for > muxing the SBU lines of a Type-C port with DisplayPort altmode and > also providing an orientation switch. > > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> > Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> > --- > drivers/usb/typec/mux/Kconfig | 10 ++ > drivers/usb/typec/mux/Makefile | 1 + > drivers/usb/typec/mux/it5205.c | 294 +++++++++++++++++++++++++++++++++ > 3 files changed, 305 insertions(+) > create mode 100644 drivers/usb/typec/mux/it5205.c > > diff --git a/drivers/usb/typec/mux/Kconfig b/drivers/usb/typec/mux/Kconfig > index d2cb5e733e57..399c7b0983df 100644 > --- a/drivers/usb/typec/mux/Kconfig > +++ b/drivers/usb/typec/mux/Kconfig > @@ -36,6 +36,16 @@ config TYPEC_MUX_INTEL_PMC > control the USB role switch and also the multiplexer/demultiplexer > switches used with USB Type-C Alternate Modes. > > +config TYPEC_MUX_IT5205 > + tristate "ITE IT5205 Type-C USB Alt Mode Passive MUX driver" > + depends on I2C > + select REGMAP_I2C > + help > + Driver for the ITE IT5205 Type-C USB Alternate Mode Passive MUX > + which provides support for muxing DisplayPort and sideband signals > + on a common USB Type-C connector. > + If compiled as a module, the module will be named it5205. > + > config TYPEC_MUX_NB7VPQ904M > tristate "On Semiconductor NB7VPQ904M Type-C redriver driver" > depends on I2C > diff --git a/drivers/usb/typec/mux/Makefile b/drivers/usb/typec/mux/Makefile > index 57dc9ac6f8dc..bb96f30267af 100644 > --- a/drivers/usb/typec/mux/Makefile > +++ b/drivers/usb/typec/mux/Makefile > @@ -4,6 +4,7 @@ obj-$(CONFIG_TYPEC_MUX_FSA4480) += fsa4480.o > obj-$(CONFIG_TYPEC_MUX_GPIO_SBU) += gpio-sbu-mux.o > obj-$(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_PTN36502) += ptn36502.o > obj-$(CONFIG_TYPEC_MUX_WCD939X_USBSS) += wcd939x-usbss.o > diff --git a/drivers/usb/typec/mux/it5205.c b/drivers/usb/typec/mux/it5205.c > new file mode 100644 > index 000000000000..5535932e42cd > --- /dev/null > +++ b/drivers/usb/typec/mux/it5205.c > @@ -0,0 +1,294 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * ITE IT5205 Type-C USB alternate mode passive mux > + * > + * Copyright (c) 2020 MediaTek Inc. > + * Copyright (c) 2024 Collabora Ltd. > + * AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> > + * > + */ > + > +#include <linux/delay.h> > +#include <linux/i2c.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/of_platform.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > +#include <linux/regulator/consumer.h> > +#include <linux/usb/tcpm.h> > +#include <linux/usb/typec.h> > +#include <linux/usb/typec_dp.h> > +#include <linux/usb/typec_mux.h> > + > +#define IT5205_REG_CHIP_ID(x) (0x4 + (x)) > +#define IT5205FN_CHIP_ID 0x35323035 /* "5205" */ > + > +/* MUX power down register */ > +#define IT5205_REG_MUXPDR 0x10 > +#define IT5205_MUX_POWER_DOWN BIT(0) > + > +/* MUX control register */ > +#define IT5205_REG_MUXCR 0x11 > +#define IT5205_POLARITY_INVERTED BIT(4) > +#define IT5205_DP_USB_CTRL_MASK GENMASK(3, 0) > +#define IT5205_DP 0x0f > +#define IT5205_DP_USB 0x03 > +#define IT5205_USB 0x07 > + > +/* Vref Select Register */ > +#define IT5205_REG_VSR 0x10 > +#define IT5205_VREF_SELECT_MASK GENMASK(5, 4) > +#define IT5205_VREF_SELECT_3_3V 0x00 > +#define IT5205_VREF_SELECT_OFF 0x20 > + > +/* CSBU Over Voltage Protection Register */ > +#define IT5205_REG_CSBUOVPSR 0x1e > +#define IT5205_OVP_SELECT_MASK GENMASK(5, 4) > +#define IT5205_OVP_3_90V 0x00 > +#define IT5205_OVP_3_68V 0x10 > +#define IT5205_OVP_3_62V 0x20 > +#define IT5205_OVP_3_57V 0x30 > + > +/* CSBU Switch Register */ > +#define IT5205_REG_CSBUSR 0x22 > +#define IT5205_CSBUSR_SWITCH BIT(0) > + > +/* Interrupt Switch Register */ > +#define IT5205_REG_ISR 0x25 > +#define IT5205_ISR_CSBU_MASK BIT(4) > +#define IT5205_ISR_CSBU_OVP BIT(0) > + > +struct it5205 { > + struct i2c_client *client; > + struct regmap *regmap; > + struct typec_switch_dev *sw; > + struct typec_mux_dev *mux; > +}; > + > +static int it5205_switch_set(struct typec_switch_dev *sw, enum typec_orientation orientation) > +{ > + struct it5205 *it = typec_switch_get_drvdata(sw); > + > + switch (orientation) { > + case TYPEC_ORIENTATION_NORMAL: > + regmap_update_bits(it->regmap, IT5205_REG_MUXCR, > + IT5205_POLARITY_INVERTED, 0); > + break; > + case TYPEC_ORIENTATION_REVERSE: > + regmap_update_bits(it->regmap, IT5205_REG_MUXCR, > + IT5205_POLARITY_INVERTED, IT5205_POLARITY_INVERTED); > + break; > + case TYPEC_ORIENTATION_NONE: > + fallthrough; > + default: > + regmap_write(it->regmap, IT5205_REG_MUXCR, 0); > + break; > + } > + > + return 0; > +} > + > +static int it5205_mux_set(struct typec_mux_dev *mux, struct typec_mux_state *state) > +{ > + struct it5205 *it = typec_mux_get_drvdata(mux); > + u8 val; > + > + if (state->mode >= TYPEC_STATE_MODAL && > + state->alt->svid != USB_TYPEC_DP_SID) > + return -EINVAL; > + > + switch (state->mode) { > + case TYPEC_STATE_USB: > + val = IT5205_USB; > + break; > + case TYPEC_DP_STATE_C: > + fallthrough; > + case TYPEC_DP_STATE_E: > + val = IT5205_DP; > + break; > + case TYPEC_DP_STATE_D: > + val = IT5205_DP_USB; > + break; > + case TYPEC_STATE_SAFE: > + fallthrough; > + default: > + val = 0; > + break; > + } > + > + return regmap_update_bits(it->regmap, IT5205_REG_MUXCR, > + IT5205_DP_USB_CTRL_MASK, val); > +} > + > +static irqreturn_t it5205_irq_handler(int irq, void *data) > +{ > + struct it5205 *it = data; > + int ret; > + u32 val; > + > + ret = regmap_read(it->regmap, IT5205_REG_ISR, &val); > + if (ret) > + return IRQ_NONE; > + > + if (val & IT5205_ISR_CSBU_OVP) { > + dev_warn(&it->client->dev, "Overvoltage detected!\n"); > + > + /* Reset CSBU */ > + regmap_update_bits(it->regmap, IT5205_REG_CSBUSR, > + IT5205_CSBUSR_SWITCH, 0); > + regmap_update_bits(it->regmap, IT5205_REG_CSBUSR, > + IT5205_CSBUSR_SWITCH, IT5205_CSBUSR_SWITCH); > + } > + > + return IRQ_HANDLED; > +} > + > +static void it5205_enable_ovp(struct it5205 *it) > +{ > + /* Select Vref 3.3v */ > + regmap_update_bits(it->regmap, IT5205_REG_VSR, > + IT5205_VREF_SELECT_MASK, IT5205_VREF_SELECT_3_3V); > + > + /* Trigger OVP at 3.68V */ > + regmap_update_bits(it->regmap, IT5205_REG_CSBUOVPSR, > + IT5205_OVP_SELECT_MASK, IT5205_OVP_3_68V); > + > + /* Unmask OVP interrupt */ > + regmap_update_bits(it->regmap, IT5205_REG_ISR, > + IT5205_ISR_CSBU_MASK, 0); > + > + /* Enable CSBU Interrupt */ > + regmap_update_bits(it->regmap, IT5205_REG_CSBUSR, > + IT5205_CSBUSR_SWITCH, IT5205_CSBUSR_SWITCH); > +} > + > +static const struct regmap_config it5205_regmap = { > + .max_register = 0x2f, > + .reg_bits = 8, > + .val_bits = 8, > +}; > + > +static int it5205_probe(struct i2c_client *client) > +{ > + struct typec_switch_desc sw_desc = { }; > + struct typec_mux_desc mux_desc = { }; > + struct device *dev = &client->dev; > + struct it5205 *it; > + u32 val, chipid = 0; > + int i, ret; > + > + it = devm_kzalloc(dev, sizeof(*it), GFP_KERNEL); > + if (!it) > + return -ENOMEM; > + > + ret = devm_regulator_get_enable(dev, "vcc"); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to get regulator\n"); > + > + it->client = client; > + > + it->regmap = devm_regmap_init_i2c(client, &it5205_regmap); > + if (IS_ERR(it->regmap)) > + return dev_err_probe(dev, PTR_ERR(it->regmap), > + "Failed to init regmap\n"); > + > + /* IT5205 needs a long time to power up after enabling regulator */ > + msleep(50); > + > + /* Unset poweroff bit */ > + ret = regmap_write(it->regmap, IT5205_REG_MUXPDR, 0); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to set power on\n"); > + > + /* Read the 32 bits ChipID */ > + for (i = 3; i >= 0; i--) { > + ret = regmap_read(it->regmap, IT5205_REG_CHIP_ID(i), &val); > + if (ret) > + return ret; > + > + chipid |= val << (i * 8); > + } > + > + if (chipid != IT5205FN_CHIP_ID) > + return dev_err_probe(dev, -EINVAL, > + "Unknown ChipID 0x%x\n", chipid); > + > + /* Initialize as USB mode with default (non-inverted) polarity */ > + ret = regmap_write(it->regmap, IT5205_REG_MUXCR, IT5205_USB); > + if (ret) > + return dev_err_probe(dev, ret, "Cannot set mode to USB\n"); > + > + sw_desc.drvdata = it; > + sw_desc.fwnode = dev_fwnode(dev); > + sw_desc.set = it5205_switch_set; > + > + it->sw = typec_switch_register(dev, &sw_desc); > + if (IS_ERR(it->sw)) > + return dev_err_probe(dev, PTR_ERR(it->sw), > + "failed to register typec switch\n"); > + > + mux_desc.drvdata = it; > + mux_desc.fwnode = dev_fwnode(dev); > + mux_desc.set = it5205_mux_set; > + > + it->mux = typec_mux_register(dev, &mux_desc); > + if (IS_ERR(it->mux)) { > + typec_switch_unregister(it->sw); > + return dev_err_probe(dev, PTR_ERR(it->mux), > + "failed to register typec mux\n"); > + } > + > + i2c_set_clientdata(client, it); > + > + if (of_property_read_bool(dev->of_node, "ite,ovp-enable") && client->irq) { > + it5205_enable_ovp(it); > + > + ret = devm_request_threaded_irq(dev, client->irq, NULL, > + it5205_irq_handler, > + IRQF_ONESHOT, dev_name(dev), it); > + if (ret) { > + typec_mux_unregister(it->mux); > + typec_switch_unregister(it->sw); > + return dev_err_probe(dev, ret, "Failed to request irq\n"); > + } > + } > + > + return 0; > +} > + > +static void it5205_remove(struct i2c_client *client) > +{ > + struct it5205 *it = i2c_get_clientdata(client); > + > + typec_mux_unregister(it->mux); > + typec_switch_unregister(it->sw); > +} > + > +static const struct i2c_device_id it5205_table[] = { > + { "it5205" }, > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(i2c, it5205_table); > + > +static const struct of_device_id it5205_of_table[] = { > + { .compatible = "ite,it5205" }, > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(of, it5205_of_table); > + > +static struct i2c_driver it5205_driver = { > + .driver = { > + .name = "it5205", > + .of_match_table = it5205_of_table, > + }, > + .probe = it5205_probe, > + .remove = it5205_remove, > + .id_table = it5205_table, > +}; > +module_i2c_driver(it5205_driver); > + > +MODULE_AUTHOR("Tianping Fang <tianping.fang@mediatek.com>"); > +MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>"); > +MODULE_DESCRIPTION("ITE IT5205 alternate mode passive MUX driver"); > +MODULE_LICENSE("GPL"); > -- > 2.43.0 -- heikki ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2024-01-24 13:43 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2024-01-22 11:04 [PATCH v3 0/2] Add ITE IT5205 Passive MUX AngeloGioacchino Del Regno 2024-01-22 11:04 ` [PATCH v3 1/2] dt-bindings: usb: Introduce ITE IT5205 Alt. Mode " AngeloGioacchino Del Regno 2024-01-23 17:25 ` Conor Dooley 2024-01-22 11:04 ` [PATCH v3 2/2] usb: typec: mux: Add ITE IT5205 Alternate Mode Passive MUX driver AngeloGioacchino Del Regno 2024-01-24 13:43 ` Heikki Krogerus
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