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author | Vijai Kumar K <vijaikumar.kanagarajan@gmail.com> | 2019-01-23 18:16:56 +0530 |
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committer | Chanwoo Choi <cw00.choi@samsung.com> | 2019-02-11 17:21:38 +0900 |
commit | 4ed754de2d66084d4a7785f565d7c42ad89a3ea9 (patch) | |
tree | 74815b048b393113a530d24376cba4c6807c4f2d | |
parent | d13937116f1e82bf508a6325111b322c30c85eb9 (diff) | |
download | linux-4ed754de2d66084d4a7785f565d7c42ad89a3ea9.tar.gz linux-4ed754de2d66084d4a7785f565d7c42ad89a3ea9.tar.bz2 linux-4ed754de2d66084d4a7785f565d7c42ad89a3ea9.zip |
extcon: Add support for ptn5150 extcon driver
PTN5150 is a small thin low power CC (Configurationn Channel)
Logic chip supporting the USB Type-C connector application with
CC control logic detection and indication functions.
Signed-off-by: Vijai Kumar K <vijaikumar.kanagarajan@gmail.com>
[cw00.choi: Fix bulid dependency and clean-up code]
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
-rw-r--r-- | Documentation/devicetree/bindings/extcon/extcon-ptn5150.txt | 27 | ||||
-rw-r--r-- | drivers/extcon/Kconfig | 8 | ||||
-rw-r--r-- | drivers/extcon/Makefile | 1 | ||||
-rw-r--r-- | drivers/extcon/extcon-ptn5150.c | 339 |
4 files changed, 375 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/extcon/extcon-ptn5150.txt b/Documentation/devicetree/bindings/extcon/extcon-ptn5150.txt new file mode 100644 index 000000000000..936fbdf12815 --- /dev/null +++ b/Documentation/devicetree/bindings/extcon/extcon-ptn5150.txt @@ -0,0 +1,27 @@ +* PTN5150 CC (Configuration Channel) Logic device + +PTN5150 is a small thin low power CC logic chip supporting the USB Type-C +connector application with 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: should contain a phandle and GPIO specifier for the GPIO pin + connected to the PTN5150's INTB pin. +- vbus-gpio: should contain a phandle and GPIO specifier for the GPIO pin which + is used to control VBUS. +- pinctrl-names : a pinctrl state named "default" must be defined. +- pinctrl-0 : phandle referencing pin configuration of interrupt and vbus + control. + +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 de15bf55895b..8e17149655f0 100644 --- a/drivers/extcon/Kconfig +++ b/drivers/extcon/Kconfig @@ -114,6 +114,14 @@ config EXTCON_PALMAS Say Y here to enable support for USB peripheral and USB host detection by palmas usb. +config EXTCON_PTN5150 + tristate "NXP PTN5150 CC LOGIC USB EXTCON support" + depends on I2C && GPIOLIB || COMPILE_TEST + select REGMAP_I2C + help + Say Y here to enable support for USB peripheral and USB host + detection by NXP PTN5150 CC (Configuration Channel) 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 0888fdeded72..261ce4cfe209 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 000000000000..18a8f258767b --- /dev/null +++ b/drivers/extcon/extcon-ptn5150.c @@ -0,0 +1,339 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// extcon-ptn5150.c - PTN5150 CC logic extcon driver to support USB detection +// +// Based on extcon-sm5502.c driver +// Copyright (c) 2018-2019 by Vijai Kumar K +// Author: Vijai Kumar K <vijaikumar.kanagarajan@gmail.com> + +#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-provider.h> +#include <linux/gpio/consumer.h> + +/* 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_VENDOR_MASK \ + (0x3 << PTN5150_REG_DEVICE_ID_VENDOR_SHIFT) + +#define PTN5150_REG_DEVICE_ID_VERSION_SHIFT 3 +#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) + +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 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) { + unsigned int cable_attach; + + cable_attach = int_status & PTN5150_REG_INT_CABLE_ATTACH_MASK; + if (cable_attach) { + unsigned int port_status; + unsigned int vbus; + + 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 const struct of_device_id ptn5150_dt_match[] = { + { .compatible = "nxp,ptn5150" }, + { }, +}; +MODULE_DEVICE_TABLE(of, ptn5150_dt_match); + +static const struct i2c_device_id ptn5150_i2c_id[] = { + { "ptn5150", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ptn5150_i2c_id); + +static struct i2c_driver ptn5150_i2c_driver = { + .driver = { + .name = "ptn5150", + .of_match_table = ptn5150_dt_match, + }, + .probe = ptn5150_i2c_probe, + .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 <vijaikumar.kanagarajan@gmail.com>"); +MODULE_LICENSE("GPL v2"); |