PTN5150A is a small thin low power CC Logic chip supporting the USB Type-C connector application with Configurationn Channel(CC) control logic detection and indication functions.
Add driver, Kconfig and Makefile entries. Change-Id: I3b2da147a33b913b9ec60cd914b20acd955950c7 Signed-off-by: Vijai Kumar K <[email protected]> --- .../devicetree/bindings/extcon/extcon-ptn5150.txt | 22 ++ drivers/extcon/Kconfig | 8 + drivers/extcon/Makefile | 1 + drivers/extcon/extcon-ptn5150.c | 327 +++++++++++++++++++++ drivers/extcon/extcon-ptn5150.h | 51 ++++ 5 files changed, 409 insertions(+) create mode 100644 Documentation/devicetree/bindings/extcon/extcon-ptn5150.txt create mode 100644 drivers/extcon/extcon-ptn5150.c create mode 100644 drivers/extcon/extcon-ptn5150.h diff --git a/Documentation/devicetree/bindings/extcon/extcon-ptn5150.txt b/Documentation/devicetree/bindings/extcon/extcon-ptn5150.txt new file mode 100644 index 0000000..8ea33bb --- /dev/null +++ b/Documentation/devicetree/bindings/extcon/extcon-ptn5150.txt @@ -0,0 +1,22 @@ + +* PTN5150 CC logic device +PTN5150A is a small thin low power CC Logic chip supporting the USB Type-C +connector application with Configuration Channel (CC) control logic detection and +indication functions. It is Interfaced to the host controller using an I2C interface. + +Required properties: +- compatible: Should be "nxp,ptn5150" +- reg: Specifies the I2C slave address of the device +- int-gpio: GPIO to which INTB is connected +- vbus-gpio: GPIO which controls VBUS on/off + +Example: + ptn5150@1d { + compatible = "nxp,ptn5150"; + reg = <0x1d>; + int-gpio = <&msmgpio 78 GPIO_ACTIVE_HIGH>; + vbus-gpio = <&msmgpio 148 GPIO_ACTIVE_HIGH>; + pinctrl-names = "default"; + pinctrl-0 = <&ptn5150_default>; + status = "okay"; + }; diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig index a7bca42..6adc797 100644 --- a/drivers/extcon/Kconfig +++ b/drivers/extcon/Kconfig @@ -113,6 +113,14 @@ config EXTCON_PALMAS Say Y here to enable support for USB peripheral and USB host detection by palmas usb. +config EXTCON_PTN5150 + tristate "PTN5150 CC LOGIC USB EXTCON support" + depends on I2C + select REGMAP_I2C + help + Say Y here to enable support for USB peripheral and USB host + detection by ptn5150 cc logic chip. + config EXTCON_QCOM_SPMI_MISC tristate "Qualcomm USB extcon support" depends on ARCH_QCOM || COMPILE_TEST diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile index 0888fde..261ce4c 100644 --- a/drivers/extcon/Makefile +++ b/drivers/extcon/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o obj-$(CONFIG_EXTCON_MAX77843) += extcon-max77843.o obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o obj-$(CONFIG_EXTCON_PALMAS) += extcon-palmas.o +obj-$(CONFIG_EXTCON_PTN5150) += extcon-ptn5150.o obj-$(CONFIG_EXTCON_QCOM_SPMI_MISC) += extcon-qcom-spmi-misc.o obj-$(CONFIG_EXTCON_RT8973A) += extcon-rt8973a.o obj-$(CONFIG_EXTCON_SM5502) += extcon-sm5502.o diff --git a/drivers/extcon/extcon-ptn5150.c b/drivers/extcon/extcon-ptn5150.c new file mode 100644 index 0000000..bc00874 --- /dev/null +++ b/drivers/extcon/extcon-ptn5150.c @@ -0,0 +1,327 @@ +/* + * extcon-ptn5150.c - PTN5150 CC logic extcon driver to support USB detection + * + * Copyright (c) 2018-2019 by Vijai Kumar K + * Author: Vijai Kumar K <[email protected]> + * + * Based on extcon-sm5502.c driver + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/extcon.h> +#include <linux/gpio.h> + +#include "extcon-ptn5150.h" + +struct ptn5150_info { + struct device *dev; + struct extcon_dev *edev; + struct i2c_client *i2c; + struct regmap *regmap; + struct gpio_desc *int_gpiod; + struct gpio_desc *vbus_gpiod; + int irq; + struct work_struct irq_work; + struct mutex mutex; +}; + +/* List of detectable cables */ +static const unsigned int ptn5150_extcon_cable[] = { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_NONE, +}; + +static const struct regmap_config ptn5150_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = PTN5150_REG_END, +}; + +static void ptn5150_irq_work(struct work_struct *work) +{ + struct ptn5150_info *info = container_of(work, + struct ptn5150_info, irq_work); + int ret = 0; + unsigned int reg_data; + unsigned int port_status; + unsigned int vbus; + unsigned int cable_attach; + unsigned int int_status; + + if (!info->edev) + return; + + mutex_lock(&info->mutex); + + ret = regmap_read(info->regmap, PTN5150_REG_CC_STATUS, ®_data); + if (ret) { + dev_err(info->dev, + "failed to read CC STATUS %d\n", ret); + mutex_unlock(&info->mutex); + return; + } + /* Clear interrupt. Read would clear the register */ + ret = regmap_read(info->regmap, PTN5150_REG_INT_STATUS, &int_status); + if (ret) { + dev_err(info->dev, + "failed to read INT STATUS %d\n", ret); + mutex_unlock(&info->mutex); + return; + } + + if (int_status) { + cable_attach = int_status & PTN5150_REG_INT_CABLE_ATTACH_MASK; + if (cable_attach) { + port_status = ((reg_data & + PTN5150_REG_CC_PORT_ATTACHMENT_MASK) >> + PTN5150_REG_CC_PORT_ATTACHMENT_SHIFT); + + switch (port_status) { + case PTN5150_DFP_ATTACHED: + extcon_set_state_sync(info->edev, + EXTCON_USB_HOST, false); + gpiod_set_value(info->vbus_gpiod, 0); + extcon_set_state_sync(info->edev, EXTCON_USB, + true); + break; + case PTN5150_UFP_ATTACHED: + extcon_set_state_sync(info->edev, EXTCON_USB, + false); + vbus = ((reg_data & + PTN5150_REG_CC_VBUS_DETECTION_MASK) >> + PTN5150_REG_CC_VBUS_DETECTION_SHIFT); + if (vbus) + gpiod_set_value(info->vbus_gpiod, 0); + else + gpiod_set_value(info->vbus_gpiod, 1); + + extcon_set_state_sync(info->edev, + EXTCON_USB_HOST, true); + break; + default: + dev_err(info->dev, + "Unknown Port status : %x\n", + port_status); + break; + } + } else { + extcon_set_state_sync(info->edev, + EXTCON_USB_HOST, false); + extcon_set_state_sync(info->edev, + EXTCON_USB, false); + gpiod_set_value(info->vbus_gpiod, 0); + } + } + + /* Clear interrupt. Read would clear the register */ + ret = regmap_read(info->regmap, PTN5150_REG_INT_REG_STATUS, + &int_status); + if (ret) { + dev_err(info->dev, + "failed to read INT REG STATUS %d\n", ret); + mutex_unlock(&info->mutex); + return; + } + + + mutex_unlock(&info->mutex); +} + + +static irqreturn_t ptn5150_irq_handler(int irq, void *data) +{ + struct ptn5150_info *info = data; + + schedule_work(&info->irq_work); + + return IRQ_HANDLED; +} + +static int ptn5150_init_dev_type(struct ptn5150_info *info) +{ + unsigned int reg_data, vendor_id, version_id; + int ret; + + ret = regmap_read(info->regmap, PTN5150_REG_DEVICE_ID, ®_data); + if (ret) { + dev_err(info->dev, "failed to read DEVICE_ID %d\n", ret); + return -EINVAL; + } + + vendor_id = ((reg_data & PTN5150_REG_DEVICE_ID_VENDOR_MASK) >> + PTN5150_REG_DEVICE_ID_VENDOR_SHIFT); + version_id = ((reg_data & PTN5150_REG_DEVICE_ID_VERSION_MASK) >> + PTN5150_REG_DEVICE_ID_VERSION_SHIFT); + + dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", + version_id, vendor_id); + + /* Clear any existing interrupts */ + ret = regmap_read(info->regmap, PTN5150_REG_INT_STATUS, ®_data); + if (ret) { + dev_err(info->dev, + "failed to read PTN5150_REG_INT_STATUS %d\n", + ret); + return -EINVAL; + } + + ret = regmap_read(info->regmap, PTN5150_REG_INT_REG_STATUS, ®_data); + if (ret) { + dev_err(info->dev, + "failed to read PTN5150_REG_INT_REG_STATUS %d\n", ret); + return -EINVAL; + } + + return 0; +} + +static int ptn5150_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct device *dev = &i2c->dev; + struct device_node *np = i2c->dev.of_node; + struct ptn5150_info *info; + int ret; + + if (!np) + return -EINVAL; + + info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + i2c_set_clientdata(i2c, info); + + info->dev = &i2c->dev; + info->i2c = i2c; + info->int_gpiod = devm_gpiod_get(&i2c->dev, "int", GPIOD_IN); + if (!info->int_gpiod) { + dev_err(dev, "failed to get INT GPIO\n"); + return -EINVAL; + } + info->vbus_gpiod = devm_gpiod_get(&i2c->dev, "vbus", GPIOD_IN); + if (!info->vbus_gpiod) { + dev_err(dev, "failed to get VBUS GPIO\n"); + return -EINVAL; + } + ret = gpiod_direction_output(info->vbus_gpiod, 0); + if (ret) { + dev_err(dev, "failed to set VBUS GPIO direction\n"); + return -EINVAL; + } + + mutex_init(&info->mutex); + + INIT_WORK(&info->irq_work, ptn5150_irq_work); + + info->regmap = devm_regmap_init_i2c(i2c, &ptn5150_regmap_config); + if (IS_ERR(info->regmap)) { + ret = PTR_ERR(info->regmap); + dev_err(info->dev, "failed to allocate register map: %d\n", + ret); + return ret; + } + + if (info->int_gpiod) { + info->irq = gpiod_to_irq(info->int_gpiod); + if (info->irq < 0) { + dev_err(dev, "failed to get INTB IRQ\n"); + return info->irq; + } + + ret = devm_request_threaded_irq(dev, info->irq, NULL, + ptn5150_irq_handler, + IRQF_TRIGGER_FALLING | + IRQF_ONESHOT, + i2c->name, info); + if (ret < 0) { + dev_err(dev, "failed to request handler for INTB IRQ\n"); + return ret; + } + } + + /* Allocate extcon device */ + info->edev = devm_extcon_dev_allocate(info->dev, ptn5150_extcon_cable); + if (IS_ERR(info->edev)) { + dev_err(info->dev, "failed to allocate memory for extcon\n"); + return -ENOMEM; + } + + /* Register extcon device */ + ret = devm_extcon_dev_register(info->dev, info->edev); + if (ret) { + dev_err(info->dev, "failed to register extcon device\n"); + return ret; + } + + /* Initialize PTN5150 device and print vendor id and version id */ + ret = ptn5150_init_dev_type(info); + if (ret) + return -EINVAL; + + return 0; +} + +static int ptn5150_i2c_remove(struct i2c_client *i2c) +{ + return 0; +} + +static const struct of_device_id ptn5150_dt_match[] = { + { .compatible = "nxp,ptn5150" }, + { }, +}; +MODULE_DEVICE_TABLE(of, ptn5150_dt_match); + +#ifdef CONFIG_PM_SLEEP +static int ptn5150_suspend(struct device *dev) +{ + return 0; +} + +static int ptn5150_resume(struct device *dev) +{ + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(ptn5150_pm_ops, + ptn5150_suspend, ptn5150_resume); + +static const struct i2c_device_id ptn5150_i2c_id[] = { + { "ptn5150", TYPE_PTN5150A }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ptn5150_i2c_id); + +static struct i2c_driver ptn5150_i2c_driver = { + .driver = { + .name = "ptn5150", + .pm = &ptn5150_pm_ops, + .of_match_table = ptn5150_dt_match, + }, + .probe = ptn5150_i2c_probe, + .remove = ptn5150_i2c_remove, + .id_table = ptn5150_i2c_id, +}; + +static int __init ptn5150_i2c_init(void) +{ + return i2c_add_driver(&ptn5150_i2c_driver); +} +subsys_initcall(ptn5150_i2c_init); + +MODULE_DESCRIPTION("NXP PTN5150 CC logic Extcon driver"); +MODULE_AUTHOR("Vijai Kumar K <[email protected]>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/extcon/extcon-ptn5150.h b/drivers/extcon/extcon-ptn5150.h new file mode 100644 index 0000000..217dab0 --- /dev/null +++ b/drivers/extcon/extcon-ptn5150.h @@ -0,0 +1,51 @@ +/* + * extcon-ptn5150.h + * + * Copyright (c) 2018-2019 by Vijai Kumar K + * Author: Vijai Kumar K <[email protected]> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#ifndef __LINUX_EXTCON_PTN5150_H +#define __LINUX_EXTCON_PTN5150_H + +enum ptn5150_types { + TYPE_PTN5150A, +}; + +/* PTN5150 registers */ +enum ptn5150_reg { + PTN5150_REG_DEVICE_ID = 0x01, + PTN5150_REG_CONTROL, + PTN5150_REG_INT_STATUS, + PTN5150_REG_CC_STATUS, + PTN5150_REG_CON_DET = 0x09, + PTN5150_REG_VCONN_STATUS, + PTN5150_REG_RESET, + PTN5150_REG_INT_MASK = 0x18, + PTN5150_REG_INT_REG_STATUS, + PTN5150_REG_END, +}; + +#define PTN5150_DFP_ATTACHED 0x1 +#define PTN5150_UFP_ATTACHED 0x2 + +/* Define PTN5150 MASK/SHIFT constant */ +#define PTN5150_REG_DEVICE_ID_VENDOR_SHIFT 0 +#define PTN5150_REG_DEVICE_ID_VERSION_SHIFT 3 +#define PTN5150_REG_DEVICE_ID_VENDOR_MASK (0x3 << PTN5150_REG_DEVICE_ID_VENDOR_SHIFT) +#define PTN5150_REG_DEVICE_ID_VERSION_MASK (0x1f << PTN5150_REG_DEVICE_ID_VERSION_SHIFT) + +#define PTN5150_REG_CC_PORT_ATTACHMENT_SHIFT 2 +#define PTN5150_REG_CC_PORT_ATTACHMENT_MASK (0x7 << PTN5150_REG_CC_PORT_ATTACHMENT_SHIFT) +#define PTN5150_REG_CC_VBUS_DETECTION_SHIFT 7 +#define PTN5150_REG_CC_VBUS_DETECTION_MASK (0x1 << PTN5150_REG_CC_VBUS_DETECTION_SHIFT) +#define PTN5150_REG_INT_CABLE_ATTACH_SHIFT 0 +#define PTN5150_REG_INT_CABLE_ATTACH_MASK (0x1 << PTN5150_REG_INT_CABLE_ATTACH_SHIFT) +#define PTN5150_REG_INT_CABLE_DETACH_SHIFT 1 +#define PTN5150_REG_INT_CABLE_DETACH_MASK (0x1 << PTN5150_REG_CC_CABLE_DETACH_SHIFT) +#endif /* __LINUX_EXTCON_PTN5150_H */ -- 2.7.4
