usb: misc: add USB251xB/xBi Hi-Speed Hub Controller Driver (3ec72a2a) · Commits · 戴 / test

Documentation/devicetree/bindings/usb/usb251xb.txt

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		Microchip USB 2.0 Hi-Speed Hub Controller

		The device node for the configuration of a Microchip USB251xB/xBi USB 2.0
		Hi-Speed Controller.

		Required properties :
		- compatible : Should be "microchip,usb251xb" or one of the specific types:
		"microchip,usb2512b", "microchip,usb2512bi", "microchip,usb2513b",
		"microchip,usb2513bi", "microchip,usb2514b", "microchip,usb2514bi"
		- hub-reset-gpios : Should specify the gpio for hub reset

		Optional properties :
		- reg : I2C address on the selected bus (default is <0x2C>)
		- skip-config : Skip Hub configuration, but only send the USB-Attach command
		- vendor-id : USB Vendor ID of the hub (16 bit, default is 0x0424)
		- product-id : USB Product ID of the hub (16 bit, default depends on type)
		- device-id : USB Device ID of the hub (16 bit, default is 0x0bb3)
		- language-id : USB Language ID (16 bit, default is 0x0000)
		- manufacturer : USB Manufacturer string (max 31 characters long)
		- product : USB Product string (max 31 characters long)
		- serial : USB Serial string (max 31 characters long)
		- {bus,self}-powered : selects between self- and bus-powered operation (default
		is self-powered)
		- disable-hi-speed : disable USB Hi-Speed support
		- {multi,single}-tt : selects between multi- and single-transaction-translator
		(default is multi-tt)
		- disable-eop : disable End of Packet generation in full-speed mode
		- {ganged,individual}-sensing : select over-current sense type in self-powered
		mode (default is individual)
		- {ganged,individual}-port-switching : select port power switching mode
		(default is individual)
		- dynamic-power-switching : enable auto-switching from self- to bus-powered
		operation if the local power source is removed or unavailable
		- oc-delay-{100us,4ms,8ms,16ms} : set over current timer delay (default is 8ms)
		- compound-device : indicated the hub is part of a compound device
		- port-mapping-mode : enable port mapping mode
		- string-support : enable string descriptor support (required for manufacturer,
		product and serial string configuration)
		- non-removable-ports : Should specify the ports which have a non-removable
		device connected.
		- sp-disabled-ports : Specifies the ports which will be self-power disabled
		- bp-disabled-ports : Specifies the ports which will be bus-power disabled
		- max-sp-power : Specifies the maximum current the hub consumes from an
		upstream port when operating as self-powered hub including the power
		consumption of a permanently attached peripheral if the hub is
		configured as a compound device. The value is given in mA in a 0 - 500
		range (default is 2).
		- max-bp-power : Specifies the maximum current the hub consumes from an
		upstream port when operating as bus-powered hub including the power
		consumption of a permanently attached peripheral if the hub is
		configured as a compound device. The value is given in mA in a 0 - 500
		range (default is 100).
		- max-sp-current : Specifies the maximum current the hub consumes from an
		upstream port when operating as self-powered hub EXCLUDING the power
		consumption of a permanently attached peripheral if the hub is
		configured as a compound device. The value is given in mA in a 0 - 500
		range (default is 2).
		- max-bp-current : Specifies the maximum current the hub consumes from an
		upstream port when operating as bus-powered hub EXCLUDING the power
		consumption of a permanently attached peripheral if the hub is
		configured as a compound device. The value is given in mA in a 0 - 500
		range (default is 100).
		- power-on-time : Specifies the time it takes from the time the host initiates
		the power-on sequence to a port until the port has adequate power. The
		value is given in ms in a 0 - 510 range (default is 100ms).

		Examples:
		usb2512b@2c {
		compatible = "microchip,usb2512b";
		hub-reset-gpios = <&gpio1 4 GPIO_ACTIVE_LOW>;
		};

		usb2514b@2c {
		compatible = "microchip,usb2514b";
		reg = <0x2c>;
		reset-gpios = <&gpio1 4 GPIO_ACTIVE_LOW>;
		vendor-id = /bits/ 16 <0x0000>;
		product-id = /bits/ 16 <0x0000>;
		string-support;
		manufacturer = "Foo";
		product = "Foo-Bar";
		serial = "1234567890A";
		};

MAINTAINERS

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		@@ -8201,6 +8201,14 @@ F: drivers/media/platform/atmel/atmel-isc.c
		F: drivers/media/platform/atmel/atmel-isc-regs.h
		F: devicetree/bindings/media/atmel-isc.txt

		MICROCHIP USB251XB DRIVER
		M: Richard Leitner <richard.leitner@skidata.com>
		L: linux-usb@vger.kernel.org
		S: Maintained
		F: drivers/usb/misc/usb251xb.c
		F: include/linux/platform_data/usb251xb.h
		F: Documentation/devicetree/bindings/usb/usb251xb.txt

		MICROSOFT SURFACE PRO 3 BUTTON DRIVER
		M: Chen Yu <yu.c.chen@intel.com>
		L: platform-driver-x86@vger.kernel.org

drivers/usb/misc/Kconfig

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		@@ -233,6 +233,15 @@ config USB_EZUSB_FX2
		Say Y here if you need EZUSB device support.
		(Cypress FX/FX2/FX2LP microcontrollers)

		config USB_HUB_USB251XB
		tristate "USB251XB Hub Controller Configuration Driver"
		depends on I2C
		help
		This option enables support for configuration via SMBus of the
		Microchip USB251xB/xBi USB 2.0 Hub Controller series.
		Configuration parameters may be set in devicetree or platform data.
		Say Y or M here if you need to configure such a device via SMBus.

		config USB_HSIC_USB3503
		tristate "USB3503 HSIC to USB20 Driver"
		depends on I2C

drivers/usb/misc/Makefile

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		@@ -23,6 +23,7 @@ obj-$(CONFIG_USB_TRANCEVIBRATOR) += trancevibrator.o
		obj-$(CONFIG_USB_USS720) += uss720.o
		obj-$(CONFIG_USB_SEVSEG) += usbsevseg.o
		obj-$(CONFIG_USB_YUREX) += yurex.o
		obj-$(CONFIG_USB_HUB_USB251XB) += usb251xb.o
		obj-$(CONFIG_USB_HSIC_USB3503) += usb3503.o
		obj-$(CONFIG_USB_HSIC_USB4604) += usb4604.o
		obj-$(CONFIG_USB_CHAOSKEY) += chaoskey.o

drivers/usb/misc/usb251xb.c

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		/*
		* Driver for Microchip USB251xB USB 2.0 Hi-Speed Hub Controller
		* Configuration via SMBus.
		*
		* Copyright (c) 2017 SKIDATA AG
		*
		* This work is based on the USB3503 driver by Dongjin Kim and
		* a not-accepted patch by Fabien Lahoudere, see:
		* https://patchwork.kernel.org/patch/9257715/
		*
		* 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.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*/

		#include <linux/delay.h>
		#include <linux/gpio.h>
		#include <linux/i2c.h>
		#include <linux/module.h>
		#include <linux/nls.h>
		#include <linux/of_device.h>
		#include <linux/of_gpio.h>
		#include <linux/slab.h>

		/* Internal Register Set Addresses & Default Values acc. to DS00001692C */
		#define USB251XB_ADDR_VENDOR_ID_LSB 0x00
		#define USB251XB_ADDR_VENDOR_ID_MSB 0x01
		#define USB251XB_DEF_VENDOR_ID 0x0424

		#define USB251XB_ADDR_PRODUCT_ID_LSB 0x02
		#define USB251XB_ADDR_PRODUCT_ID_MSB 0x03
		#define USB251XB_DEF_PRODUCT_ID_12 0x2512 /* USB2512B/12Bi */
		#define USB251XB_DEF_PRODUCT_ID_13 0x2513 /* USB2513B/13Bi */
		#define USB251XB_DEF_PRODUCT_ID_14 0x2514 /* USB2514B/14Bi */

		#define USB251XB_ADDR_DEVICE_ID_LSB 0x04
		#define USB251XB_ADDR_DEVICE_ID_MSB 0x05
		#define USB251XB_DEF_DEVICE_ID 0x0BB3

		#define USB251XB_ADDR_CONFIG_DATA_1 0x06
		#define USB251XB_DEF_CONFIG_DATA_1 0x9B
		#define USB251XB_ADDR_CONFIG_DATA_2 0x07
		#define USB251XB_DEF_CONFIG_DATA_2 0x20
		#define USB251XB_ADDR_CONFIG_DATA_3 0x08
		#define USB251XB_DEF_CONFIG_DATA_3 0x02

		#define USB251XB_ADDR_NON_REMOVABLE_DEVICES 0x09
		#define USB251XB_DEF_NON_REMOVABLE_DEVICES 0x00

		#define USB251XB_ADDR_PORT_DISABLE_SELF 0x0A
		#define USB251XB_DEF_PORT_DISABLE_SELF 0x00
		#define USB251XB_ADDR_PORT_DISABLE_BUS 0x0B
		#define USB251XB_DEF_PORT_DISABLE_BUS 0x00

		#define USB251XB_ADDR_MAX_POWER_SELF 0x0C
		#define USB251XB_DEF_MAX_POWER_SELF 0x01
		#define USB251XB_ADDR_MAX_POWER_BUS 0x0D
		#define USB251XB_DEF_MAX_POWER_BUS 0x32

		#define USB251XB_ADDR_MAX_CURRENT_SELF 0x0E
		#define USB251XB_DEF_MAX_CURRENT_SELF 0x01
		#define USB251XB_ADDR_MAX_CURRENT_BUS 0x0F
		#define USB251XB_DEF_MAX_CURRENT_BUS 0x32

		#define USB251XB_ADDR_POWER_ON_TIME 0x10
		#define USB251XB_DEF_POWER_ON_TIME 0x32

		#define USB251XB_ADDR_LANGUAGE_ID_HIGH 0x11
		#define USB251XB_ADDR_LANGUAGE_ID_LOW 0x12
		#define USB251XB_DEF_LANGUAGE_ID 0x0000

		#define USB251XB_STRING_BUFSIZE 62
		#define USB251XB_ADDR_MANUFACTURER_STRING_LEN 0x13
		#define USB251XB_ADDR_MANUFACTURER_STRING 0x16
		#define USB251XB_DEF_MANUFACTURER_STRING "Microchip"

		#define USB251XB_ADDR_PRODUCT_STRING_LEN 0x14
		#define USB251XB_ADDR_PRODUCT_STRING 0x54
		#define USB251XB_DEF_PRODUCT_STRING "USB251xB/xBi"

		#define USB251XB_ADDR_SERIAL_STRING_LEN 0x15
		#define USB251XB_ADDR_SERIAL_STRING 0x92
		#define USB251XB_DEF_SERIAL_STRING ""

		#define USB251XB_ADDR_BATTERY_CHARGING_ENABLE 0xD0
		#define USB251XB_DEF_BATTERY_CHARGING_ENABLE 0x00

		#define USB251XB_ADDR_BOOST_UP 0xF6
		#define USB251XB_DEF_BOOST_UP 0x00
		#define USB251XB_ADDR_BOOST_X 0xF8
		#define USB251XB_DEF_BOOST_X 0x00

		#define USB251XB_ADDR_PORT_SWAP 0xFA
		#define USB251XB_DEF_PORT_SWAP 0x00

		#define USB251XB_ADDR_PORT_MAP_12 0xFB
		#define USB251XB_DEF_PORT_MAP_12 0x00
		#define USB251XB_ADDR_PORT_MAP_34 0xFC
		#define USB251XB_DEF_PORT_MAP_34 0x00 /* USB2513B/i & USB2514B/i only */

		#define USB251XB_ADDR_STATUS_COMMAND 0xFF
		#define USB251XB_STATUS_COMMAND_SMBUS_DOWN 0x04
		#define USB251XB_STATUS_COMMAND_RESET 0x02
		#define USB251XB_STATUS_COMMAND_ATTACH 0x01

		#define USB251XB_I2C_REG_SZ 0x100
		#define USB251XB_I2C_WRITE_SZ 0x10

		#define DRIVER_NAME "usb251xb"
		#define DRIVER_DESC "Microchip USB 2.0 Hi-Speed Hub Controller"
		#define DRIVER_VERSION "1.0"

		struct usb251xb {
		struct device *dev;
		struct i2c_client *i2c;
		u8 skip_config;
		int gpio_reset;
		u16 vendor_id;
		u16 product_id;
		u16 device_id;
		u8 conf_data1;
		u8 conf_data2;
		u8 conf_data3;
		u8 non_rem_dev;
		u8 port_disable_sp;
		u8 port_disable_bp;
		u8 max_power_sp;
		u8 max_power_bp;
		u8 max_current_sp;
		u8 max_current_bp;
		u8 power_on_time;
		u16 lang_id;
		u8 manufacturer_len;
		u8 product_len;
		u8 serial_len;
		char manufacturer[USB251XB_STRING_BUFSIZE];
		char product[USB251XB_STRING_BUFSIZE];
		char serial[USB251XB_STRING_BUFSIZE];
		u8 bat_charge_en;
		u8 boost_up;
		u8 boost_x;
		u8 port_swap;
		u8 port_map12;
		u8 port_map34;
		u8 status;
		};

		struct usb251xb_data {
		u16 product_id;
		char product_str[USB251XB_STRING_BUFSIZE / 2]; /* ASCII string */
		};

		static const struct usb251xb_data usb2512b_data = {
		.product_id = 0x2512,
		.product_str = "USB2512B",
		};

		static const struct usb251xb_data usb2512bi_data = {
		.product_id = 0x2512,
		.product_str = "USB2512Bi",
		};

		static const struct usb251xb_data usb2513b_data = {
		.product_id = 0x2513,
		.product_str = "USB2513B",
		};

		static const struct usb251xb_data usb2513bi_data = {
		.product_id = 0x2513,
		.product_str = "USB2513Bi",
		};

		static const struct usb251xb_data usb2514b_data = {
		.product_id = 0x2514,
		.product_str = "USB2514B",
		};

		static const struct usb251xb_data usb2514bi_data = {
		.product_id = 0x2514,
		.product_str = "USB2514Bi",
		};

		static void usb251xb_reset(struct usb251xb *hub, int state)
		{
		if (!gpio_is_valid(hub->gpio_reset))
		return;

		gpio_set_value_cansleep(hub->gpio_reset, state);

		/* wait for hub recovery/stabilization */
		if (state)
		usleep_range(500, 750); /* >=500us at power on */
		else
		usleep_range(1, 10); /* >=1us at power down */
		}

		static int usb251xb_connect(struct usb251xb *hub)
		{
		struct device *dev = hub->dev;
		int err, i;
		char i2c_wb[USB251XB_I2C_REG_SZ];

		memset(i2c_wb, 0, USB251XB_I2C_REG_SZ);

		if (hub->skip_config) {
		dev_info(dev, "Skip hub configuration, only attach.\n");
		i2c_wb[0] = 0x01;
		i2c_wb[1] = USB251XB_STATUS_COMMAND_ATTACH;

		usb251xb_reset(hub, 1);

		err = i2c_smbus_write_i2c_block_data(hub->i2c,
		USB251XB_ADDR_STATUS_COMMAND, 2, i2c_wb);
		if (err) {
		dev_err(dev, "attaching hub failed: %d\n", err);
		return err;
		}
		return 0;
		}

		i2c_wb[USB251XB_ADDR_VENDOR_ID_MSB] = (hub->vendor_id >> 8) & 0xFF;
		i2c_wb[USB251XB_ADDR_VENDOR_ID_LSB] = hub->vendor_id & 0xFF;
		i2c_wb[USB251XB_ADDR_PRODUCT_ID_MSB] = (hub->product_id >> 8) & 0xFF;
		i2c_wb[USB251XB_ADDR_PRODUCT_ID_LSB] = hub->product_id & 0xFF;
		i2c_wb[USB251XB_ADDR_DEVICE_ID_MSB] = (hub->device_id >> 8) & 0xFF;
		i2c_wb[USB251XB_ADDR_DEVICE_ID_LSB] = hub->device_id & 0xFF;
		i2c_wb[USB251XB_ADDR_CONFIG_DATA_1] = hub->conf_data1;
		i2c_wb[USB251XB_ADDR_CONFIG_DATA_2] = hub->conf_data2;
		i2c_wb[USB251XB_ADDR_CONFIG_DATA_3] = hub->conf_data3;
		i2c_wb[USB251XB_ADDR_NON_REMOVABLE_DEVICES] = hub->non_rem_dev;
		i2c_wb[USB251XB_ADDR_PORT_DISABLE_SELF] = hub->port_disable_sp;
		i2c_wb[USB251XB_ADDR_PORT_DISABLE_BUS] = hub->port_disable_bp;
		i2c_wb[USB251XB_ADDR_MAX_POWER_SELF] = hub->max_power_sp;
		i2c_wb[USB251XB_ADDR_MAX_POWER_BUS] = hub->max_power_bp;
		i2c_wb[USB251XB_ADDR_MAX_CURRENT_SELF] = hub->max_current_sp;
		i2c_wb[USB251XB_ADDR_MAX_CURRENT_BUS] = hub->max_current_bp;
		i2c_wb[USB251XB_ADDR_POWER_ON_TIME] = hub->power_on_time;
		i2c_wb[USB251XB_ADDR_LANGUAGE_ID_HIGH] = (hub->lang_id >> 8) & 0xFF;
		i2c_wb[USB251XB_ADDR_LANGUAGE_ID_LOW] = hub->lang_id & 0xFF;
		i2c_wb[USB251XB_ADDR_MANUFACTURER_STRING_LEN] = hub->manufacturer_len;
		i2c_wb[USB251XB_ADDR_PRODUCT_STRING_LEN] = hub->product_len;
		i2c_wb[USB251XB_ADDR_SERIAL_STRING_LEN] = hub->serial_len;
		memcpy(&i2c_wb[USB251XB_ADDR_MANUFACTURER_STRING], hub->manufacturer,
		USB251XB_STRING_BUFSIZE);
		memcpy(&i2c_wb[USB251XB_ADDR_SERIAL_STRING], hub->serial,
		USB251XB_STRING_BUFSIZE);
		memcpy(&i2c_wb[USB251XB_ADDR_PRODUCT_STRING], hub->product,
		USB251XB_STRING_BUFSIZE);
		i2c_wb[USB251XB_ADDR_BATTERY_CHARGING_ENABLE] = hub->bat_charge_en;
		i2c_wb[USB251XB_ADDR_BOOST_UP] = hub->boost_up;
		i2c_wb[USB251XB_ADDR_BOOST_X] = hub->boost_x;
		i2c_wb[USB251XB_ADDR_PORT_SWAP] = hub->port_swap;
		i2c_wb[USB251XB_ADDR_PORT_MAP_12] = hub->port_map12;
		i2c_wb[USB251XB_ADDR_PORT_MAP_34] = hub->port_map34;
		i2c_wb[USB251XB_ADDR_STATUS_COMMAND] = USB251XB_STATUS_COMMAND_ATTACH;

		usb251xb_reset(hub, 1);

		/* write registers */
		for (i = 0; i < (USB251XB_I2C_REG_SZ / USB251XB_I2C_WRITE_SZ); i++) {
		int offset = i * USB251XB_I2C_WRITE_SZ;
		char wbuf[USB251XB_I2C_WRITE_SZ + 1];

		/* The first data byte transferred tells the hub how many data
		* bytes will follow (byte count).
		*/
		wbuf[0] = USB251XB_I2C_WRITE_SZ;
		memcpy(&wbuf[1], &i2c_wb[offset], USB251XB_I2C_WRITE_SZ);

		dev_dbg(dev, "writing %d byte block %d to 0x%02X\n",
		USB251XB_I2C_WRITE_SZ, i, offset);

		err = i2c_smbus_write_i2c_block_data(hub->i2c, offset,
		USB251XB_I2C_WRITE_SZ + 1,
		wbuf);
		if (err)
		goto out_err;
		}

		dev_info(dev, "Hub configuration was successful.\n");
		return 0;

		out_err:
		dev_err(dev, "configuring block %d failed: %d\n", i, err);
		return err;
		}

		#ifdef CONFIG_OF
		static int usb251xb_get_ofdata(struct usb251xb *hub,
		struct usb251xb_data *data)
		{
		struct device *dev = hub->dev;
		struct device_node *np = dev->of_node;
		int len, err, i;
		u32 *property_u32 = NULL;
		const u32 *cproperty_u32;
		const char *cproperty_char;
		char str[USB251XB_STRING_BUFSIZE / 2];

		if (!np) {
		dev_err(dev, "failed to get ofdata\n");
		return -ENODEV;
		}

		if (of_get_property(np, "skip-config", NULL))
		hub->skip_config = 1;
		else
		hub->skip_config = 0;

		hub->gpio_reset = of_get_named_gpio(np, "reset-gpios", 0);
		if (hub->gpio_reset == -EPROBE_DEFER)
		return -EPROBE_DEFER;
		if (gpio_is_valid(hub->gpio_reset)) {
		err = devm_gpio_request_one(dev, hub->gpio_reset,
		GPIOF_OUT_INIT_LOW,
		"usb251xb reset");
		if (err) {
		dev_err(dev,
		"unable to request GPIO %d as reset pin (%d)\n",
		hub->gpio_reset, err);
		return err;
		}
		}

		if (of_property_read_u16_array(np, "vendor-id", &hub->vendor_id, 1))
		hub->vendor_id = USB251XB_DEF_VENDOR_ID;

		if (of_property_read_u16_array(np, "product-id",
		&hub->product_id, 1))
		hub->product_id = data->product_id;

		if (of_property_read_u16_array(np, "device-id", &hub->device_id, 1))
		hub->device_id = USB251XB_DEF_DEVICE_ID;

		hub->conf_data1 = USB251XB_DEF_CONFIG_DATA_1;
		if (of_get_property(np, "self-powered", NULL)) {
		hub->conf_data1 \|= BIT(7);

		/* Configure Over-Current sens when self-powered */
		hub->conf_data1 &= ~BIT(2);
		if (of_get_property(np, "ganged-sensing", NULL))
		hub->conf_data1 &= ~BIT(1);
		else if (of_get_property(np, "individual-sensing", NULL))
		hub->conf_data1 \|= BIT(1);
		} else if (of_get_property(np, "bus-powered", NULL)) {
		hub->conf_data1 &= ~BIT(7);

		/* Disable Over-Current sense when bus-powered */
		hub->conf_data1 \|= BIT(2);
		}

		if (of_get_property(np, "disable-hi-speed", NULL))
		hub->conf_data1 \|= BIT(5);

		if (of_get_property(np, "multi-tt", NULL))
		hub->conf_data1 \|= BIT(4);
		else if (of_get_property(np, "single-tt", NULL))
		hub->conf_data1 &= ~BIT(4);

		if (of_get_property(np, "disable-eop", NULL))
		hub->conf_data1 \|= BIT(3);

		if (of_get_property(np, "individual-port-switching", NULL))
		hub->conf_data1 \|= BIT(0);
		else if (of_get_property(np, "ganged-port-switching", NULL))
		hub->conf_data1 &= ~BIT(0);

		hub->conf_data2 = USB251XB_DEF_CONFIG_DATA_2;
		if (of_get_property(np, "dynamic-power-switching", NULL))
		hub->conf_data2 \|= BIT(7);

		if (of_get_property(np, "oc-delay-100us", NULL)) {
		hub->conf_data2 &= ~BIT(5);
		hub->conf_data2 &= ~BIT(4);
		} else if (of_get_property(np, "oc-delay-4ms", NULL)) {
		hub->conf_data2 &= ~BIT(5);
		hub->conf_data2 \|= BIT(4);
		} else if (of_get_property(np, "oc-delay-8ms", NULL)) {
		hub->conf_data2 \|= BIT(5);
		hub->conf_data2 &= ~BIT(4);
		} else if (of_get_property(np, "oc-delay-16ms", NULL)) {
		hub->conf_data2 \|= BIT(5);
		hub->conf_data2 \|= BIT(4);
		}

		if (of_get_property(np, "compound-device", NULL))
		hub->conf_data2 \|= BIT(3);

		hub->conf_data3 = USB251XB_DEF_CONFIG_DATA_3;
		if (of_get_property(np, "port-mapping-mode", NULL))
		hub->conf_data3 \|= BIT(3);

		if (of_get_property(np, "string-support", NULL))
		hub->conf_data3 \|= BIT(0);

		hub->non_rem_dev = USB251XB_DEF_NON_REMOVABLE_DEVICES;
		cproperty_u32 = of_get_property(np, "non-removable-ports", &len);
		if (cproperty_u32 && (len / sizeof(u32)) > 0) {
		for (i = 0; i < len / sizeof(u32); i++) {
		u32 port = be32_to_cpu(cproperty_u32[i]);

		if ((port >= 1) && (port <= 4))
		hub->non_rem_dev \|= BIT(port);
		}
		}

		hub->port_disable_sp = USB251XB_DEF_PORT_DISABLE_SELF;
		cproperty_u32 = of_get_property(np, "sp-disabled-ports", &len);
		if (cproperty_u32 && (len / sizeof(u32)) > 0) {
		for (i = 0; i < len / sizeof(u32); i++) {
		u32 port = be32_to_cpu(cproperty_u32[i]);

		if ((port >= 1) && (port <= 4))
		hub->port_disable_sp \|= BIT(port);
		}
		}

		hub->port_disable_bp = USB251XB_DEF_PORT_DISABLE_BUS;
		cproperty_u32 = of_get_property(np, "bp-disabled-ports", &len);
		if (cproperty_u32 && (len / sizeof(u32)) > 0) {
		for (i = 0; i < len / sizeof(u32); i++) {
		u32 port = be32_to_cpu(cproperty_u32[i]);

		if ((port >= 1) && (port <= 4))
		hub->port_disable_bp \|= BIT(port);
		}
		}

		hub->max_power_sp = USB251XB_DEF_MAX_POWER_SELF;
		if (!of_property_read_u32(np, "max-sp-power", property_u32))
		hub->max_power_sp = min_t(u8, be32_to_cpu(*property_u32) / 2,
		250);

		hub->max_power_bp = USB251XB_DEF_MAX_POWER_BUS;
		if (!of_property_read_u32(np, "max-bp-power", property_u32))
		hub->max_power_bp = min_t(u8, be32_to_cpu(*property_u32) / 2,
		250);

		hub->max_current_sp = USB251XB_DEF_MAX_CURRENT_SELF;
		if (!of_property_read_u32(np, "max-sp-current", property_u32))
		hub->max_current_sp = min_t(u8, be32_to_cpu(*property_u32) / 2,
		250);

		hub->max_current_bp = USB251XB_DEF_MAX_CURRENT_BUS;
		if (!of_property_read_u32(np, "max-bp-current", property_u32))
		hub->max_current_bp = min_t(u8, be32_to_cpu(*property_u32) / 2,
		250);

		hub->power_on_time = USB251XB_DEF_POWER_ON_TIME;
		if (!of_property_read_u32(np, "power-on-time", property_u32))
		hub->power_on_time = min_t(u8, be32_to_cpu(*property_u32) / 2,
		255);

		if (of_property_read_u16_array(np, "language-id", &hub->lang_id, 1))
		hub->lang_id = USB251XB_DEF_LANGUAGE_ID;

		cproperty_char = of_get_property(np, "manufacturer", NULL);
		strlcpy(str, cproperty_char ? : USB251XB_DEF_MANUFACTURER_STRING,
		sizeof(str));
		hub->manufacturer_len = strlen(str) & 0xFF;
		memset(hub->manufacturer, 0, USB251XB_STRING_BUFSIZE);
		len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
		len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
		(wchar_t *)hub->manufacturer,
		USB251XB_STRING_BUFSIZE);

		cproperty_char = of_get_property(np, "product", NULL);
		strlcpy(str, cproperty_char ? : data->product_str, sizeof(str));
		hub->product_len = strlen(str) & 0xFF;
		memset(hub->product, 0, USB251XB_STRING_BUFSIZE);
		len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
		len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
		(wchar_t *)hub->product,
		USB251XB_STRING_BUFSIZE);

		cproperty_char = of_get_property(np, "serial", NULL);
		strlcpy(str, cproperty_char ? : USB251XB_DEF_SERIAL_STRING,
		sizeof(str));
		hub->serial_len = strlen(str) & 0xFF;
		memset(hub->serial, 0, USB251XB_STRING_BUFSIZE);
		len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
		len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
		(wchar_t *)hub->serial,
		USB251XB_STRING_BUFSIZE);

		/* The following parameters are currently not exposed to devicetree, but
		* may be as soon as needed.
		*/
		hub->bat_charge_en = USB251XB_DEF_BATTERY_CHARGING_ENABLE;
		hub->boost_up = USB251XB_DEF_BOOST_UP;
		hub->boost_x = USB251XB_DEF_BOOST_X;
		hub->port_swap = USB251XB_DEF_PORT_SWAP;
		hub->port_map12 = USB251XB_DEF_PORT_MAP_12;
		hub->port_map34 = USB251XB_DEF_PORT_MAP_34;

		return 0;
		}

		static const struct of_device_id usb251xb_of_match[] = {
		{
		.compatible = "microchip,usb2512b",
		.data = &usb2512b_data,
		}, {
		.compatible = "microchip,usb2512bi",
		.data = &usb2512bi_data,
		}, {
		.compatible = "microchip,usb2513b",
		.data = &usb2513b_data,
		}, {
		.compatible = "microchip,usb2513bi",
		.data = &usb2513bi_data,
		}, {
		.compatible = "microchip,usb2514b",
		.data = &usb2514b_data,
		}, {
		.compatible = "microchip,usb2514bi",
		.data = &usb2514bi_data,
		}, {
		/* sentinel */
		}
		};
		MODULE_DEVICE_TABLE(of, usb251xb_of_match);
		#else /* CONFIG_OF */
		static int usb251xb_get_ofdata(struct usb251xb *hub,
		struct usb251xb_data *data)
		{
		return 0;
		}
		#endif /* CONFIG_OF */

		static int usb251xb_probe(struct usb251xb *hub)
		{
		struct device *dev = hub->dev;
		struct device_node *np = dev->of_node;
		const struct of_device_id *of_id = of_match_device(usb251xb_of_match,
		dev);
		int err;

		if (np) {
		err = usb251xb_get_ofdata(hub,
		(struct usb251xb_data *)of_id->data);
		if (err) {
		dev_err(dev, "failed to get ofdata: %d\n", err);
		return err;
		}
		}

		err = usb251xb_connect(hub);
		if (err) {
		dev_err(dev, "Failed to connect hub (%d)\n", err);
		return err;
		}

		dev_info(dev, "Hub probed successfully\n");

		return 0;
		}

		static int usb251xb_i2c_probe(struct i2c_client *i2c,
		const struct i2c_device_id *id)
		{
		struct usb251xb *hub;

		hub = devm_kzalloc(&i2c->dev, sizeof(struct usb251xb), GFP_KERNEL);
		if (!hub)
		return -ENOMEM;

		i2c_set_clientdata(i2c, hub);
		hub->dev = &i2c->dev;
		hub->i2c = i2c;

		return usb251xb_probe(hub);
		}

		static const struct i2c_device_id usb251xb_id[] = {
		{ "usb2512b", 0 },
		{ "usb2512bi", 0 },
		{ "usb2513b", 0 },
		{ "usb2513bi", 0 },
		{ "usb2514b", 0 },
		{ "usb2514bi", 0 },
		{ /* sentinel */ }
		};
		MODULE_DEVICE_TABLE(i2c, usb251xb_id);

		static struct i2c_driver usb251xb_i2c_driver = {
		.driver = {
		.name = DRIVER_NAME,
		.of_match_table = of_match_ptr(usb251xb_of_match),
		},
		.probe = usb251xb_i2c_probe,
		.id_table = usb251xb_id,
		};

		module_i2c_driver(usb251xb_i2c_driver);

		MODULE_AUTHOR("Richard Leitner <richard.leitner@skidata.com>");
		MODULE_DESCRIPTION("USB251xB/xBi USB 2.0 Hub Controller Driver");
		MODULE_LICENSE("GPL");

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