| // SPDX-License-Identifier: GPL-2.0+ | |
| /* | |
| * 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/ | |
| */ | |
| #include <linux/delay.h> | |
| #include <linux/gpio/consumer.h> | |
| #include <linux/gpio/driver.h> | |
| #include <linux/i2c.h> | |
| #include <linux/module.h> | |
| #include <linux/nls.h> | |
| #include <linux/of.h> | |
| #include <linux/platform_device.h> | |
| #include <linux/regulator/consumer.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_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_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_57 0xF7 | |
| #define USB251XB_DEF_BOOST_57 0x00 | |
| #define USB251XB_ADDR_BOOST_14 0xF8 | |
| #define USB251XB_DEF_BOOST_14 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 /* USB251{3B/i,4B/i,7/i} only */ | |
| #define USB251XB_ADDR_PORT_MAP_56 0xFD | |
| #define USB251XB_DEF_PORT_MAP_56 0x00 /* USB2517/i only */ | |
| #define USB251XB_ADDR_PORT_MAP_7 0xFE | |
| #define USB251XB_DEF_PORT_MAP_7 0x00 /* USB2517/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" | |
| struct usb251xb { | |
| struct device *dev; | |
| struct i2c_client *i2c; | |
| struct regulator *vdd; | |
| u8 skip_config; | |
| struct gpio_desc *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_57; | |
| u8 boost_14; | |
| u8 port_swap; | |
| u8 port_map12; | |
| u8 port_map34; | |
| u8 port_map56; | |
| u8 port_map7; | |
| u8 status; | |
| }; | |
| struct usb251xb_data { | |
| u16 product_id; | |
| u8 port_cnt; | |
| bool led_support; | |
| bool bat_support; | |
| char product_str[USB251XB_STRING_BUFSIZE / 2]; /* ASCII string */ | |
| }; | |
| static const struct usb251xb_data usb2422_data = { | |
| .product_id = 0x2422, | |
| .port_cnt = 2, | |
| .led_support = false, | |
| .bat_support = true, | |
| .product_str = "USB2422", | |
| }; | |
| static const struct usb251xb_data usb2512b_data = { | |
| .product_id = 0x2512, | |
| .port_cnt = 2, | |
| .led_support = false, | |
| .bat_support = true, | |
| .product_str = "USB2512B", | |
| }; | |
| static const struct usb251xb_data usb2512bi_data = { | |
| .product_id = 0x2512, | |
| .port_cnt = 2, | |
| .led_support = false, | |
| .bat_support = true, | |
| .product_str = "USB2512Bi", | |
| }; | |
| static const struct usb251xb_data usb2513b_data = { | |
| .product_id = 0x2513, | |
| .port_cnt = 3, | |
| .led_support = false, | |
| .bat_support = true, | |
| .product_str = "USB2513B", | |
| }; | |
| static const struct usb251xb_data usb2513bi_data = { | |
| .product_id = 0x2513, | |
| .port_cnt = 3, | |
| .led_support = false, | |
| .bat_support = true, | |
| .product_str = "USB2513Bi", | |
| }; | |
| static const struct usb251xb_data usb2514b_data = { | |
| .product_id = 0x2514, | |
| .port_cnt = 4, | |
| .led_support = false, | |
| .bat_support = true, | |
| .product_str = "USB2514B", | |
| }; | |
| static const struct usb251xb_data usb2514bi_data = { | |
| .product_id = 0x2514, | |
| .port_cnt = 4, | |
| .led_support = false, | |
| .bat_support = true, | |
| .product_str = "USB2514Bi", | |
| }; | |
| static const struct usb251xb_data usb2517_data = { | |
| .product_id = 0x2517, | |
| .port_cnt = 7, | |
| .led_support = true, | |
| .bat_support = false, | |
| .product_str = "USB2517", | |
| }; | |
| static const struct usb251xb_data usb2517i_data = { | |
| .product_id = 0x2517, | |
| .port_cnt = 7, | |
| .led_support = true, | |
| .bat_support = false, | |
| .product_str = "USB2517i", | |
| }; | |
| #ifdef CONFIG_GPIOLIB | |
| static int usb251xb_check_dev_children(struct device *dev, void *child) | |
| { | |
| if (dev->type == &i2c_adapter_type) { | |
| return device_for_each_child(dev, child, | |
| usb251xb_check_dev_children); | |
| } | |
| return (dev == child); | |
| } | |
| static int usb251x_check_gpio_chip(struct usb251xb *hub) | |
| { | |
| struct gpio_chip *gc = gpiod_to_chip(hub->gpio_reset); | |
| struct i2c_adapter *adap; | |
| int ret; | |
| if (!hub->i2c) | |
| return 0; | |
| if (!hub->gpio_reset) | |
| return 0; | |
| if (!gc) | |
| return -EINVAL; | |
| adap = hub->i2c->adapter; | |
| ret = usb251xb_check_dev_children(&adap->dev, gc->parent); | |
| if (ret) { | |
| dev_err(hub->dev, "Reset GPIO chip is at the same i2c-bus\n"); | |
| return -EINVAL; | |
| } | |
| return 0; | |
| } | |
| #else | |
| static int usb251x_check_gpio_chip(struct usb251xb *hub) | |
| { | |
| return 0; | |
| } | |
| #endif | |
| static void usb251xb_reset(struct usb251xb *hub) | |
| { | |
| if (!hub->gpio_reset) | |
| return; | |
| if (hub->i2c) | |
| i2c_lock_bus(hub->i2c->adapter, I2C_LOCK_SEGMENT); | |
| gpiod_set_value_cansleep(hub->gpio_reset, 1); | |
| usleep_range(1, 10); /* >=1us RESET_N asserted */ | |
| gpiod_set_value_cansleep(hub->gpio_reset, 0); | |
| /* wait for hub recovery/stabilization */ | |
| usleep_range(500, 750); /* >=500us after RESET_N deasserted */ | |
| if (hub->i2c) | |
| i2c_unlock_bus(hub->i2c->adapter, I2C_LOCK_SEGMENT); | |
| } | |
| static int usb251xb_connect(struct usb251xb *hub) | |
| { | |
| struct device *dev = hub->dev; | |
| int err, i; | |
| char i2c_wb[USB251XB_I2C_REG_SZ]; | |
| if (!hub->i2c) { | |
| usb251xb_reset(hub); | |
| dev_info(dev, "hub is put in default configuration.\n"); | |
| return 0; | |
| } | |
| 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); | |
| 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_57] = hub->boost_57; | |
| i2c_wb[USB251XB_ADDR_BOOST_14] = hub->boost_14; | |
| 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_PORT_MAP_56] = hub->port_map56; | |
| i2c_wb[USB251XB_ADDR_PORT_MAP_7] = hub->port_map7; | |
| i2c_wb[USB251XB_ADDR_STATUS_COMMAND] = USB251XB_STATUS_COMMAND_ATTACH; | |
| usb251xb_reset(hub); | |
| /* 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; | |
| } | |
| static void usb251xb_get_ports_field(struct usb251xb *hub, | |
| const char *prop_name, u8 port_cnt, | |
| bool ds_only, u8 *fld) | |
| { | |
| struct device *dev = hub->dev; | |
| u32 port; | |
| of_property_for_each_u32(dev->of_node, prop_name, port) { | |
| if ((port >= ds_only ? 1 : 0) && (port <= port_cnt)) | |
| *fld |= BIT(port); | |
| else | |
| dev_warn(dev, "port %u doesn't exist\n", port); | |
| } | |
| } | |
| static int usb251xb_get_ofdata(struct usb251xb *hub, | |
| const struct usb251xb_data *data) | |
| { | |
| struct device *dev = hub->dev; | |
| struct device_node *np = dev->of_node; | |
| int len; | |
| u32 property_u32 = 0; | |
| const char *cproperty_char; | |
| char str[USB251XB_STRING_BUFSIZE / 2]; | |
| if (!np) { | |
| dev_err(dev, "failed to get ofdata\n"); | |
| return -ENODEV; | |
| } | |
| hub->skip_config = of_property_read_bool(np, "skip-config"); | |
| hub->gpio_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); | |
| if (IS_ERR(hub->gpio_reset)) | |
| return dev_err_probe(dev, PTR_ERR(hub->gpio_reset), | |
| "unable to request GPIO reset pin\n"); | |
| if (of_property_read_u16(np, "vendor-id", &hub->vendor_id)) | |
| hub->vendor_id = USB251XB_DEF_VENDOR_ID; | |
| if (of_property_read_u16(np, "product-id", &hub->product_id)) | |
| hub->product_id = data->product_id; | |
| if (of_property_read_u16(np, "device-id", &hub->device_id)) | |
| hub->device_id = USB251XB_DEF_DEVICE_ID; | |
| hub->conf_data1 = USB251XB_DEF_CONFIG_DATA_1; | |
| if (of_property_read_bool(np, "self-powered")) { | |
| hub->conf_data1 |= BIT(7); | |
| /* Configure Over-Current sens when self-powered */ | |
| hub->conf_data1 &= ~BIT(2); | |
| if (of_property_read_bool(np, "ganged-sensing")) | |
| hub->conf_data1 &= ~BIT(1); | |
| else if (of_property_read_bool(np, "individual-sensing")) | |
| hub->conf_data1 |= BIT(1); | |
| } else if (of_property_read_bool(np, "bus-powered")) { | |
| hub->conf_data1 &= ~BIT(7); | |
| /* Disable Over-Current sense when bus-powered */ | |
| hub->conf_data1 |= BIT(2); | |
| } | |
| if (of_property_read_bool(np, "disable-hi-speed")) | |
| hub->conf_data1 |= BIT(5); | |
| if (of_property_read_bool(np, "multi-tt")) | |
| hub->conf_data1 |= BIT(4); | |
| else if (of_property_read_bool(np, "single-tt")) | |
| hub->conf_data1 &= ~BIT(4); | |
| if (of_property_read_bool(np, "disable-eop")) | |
| hub->conf_data1 |= BIT(3); | |
| if (of_property_read_bool(np, "individual-port-switching")) | |
| hub->conf_data1 |= BIT(0); | |
| else if (of_property_read_bool(np, "ganged-port-switching")) | |
| hub->conf_data1 &= ~BIT(0); | |
| hub->conf_data2 = USB251XB_DEF_CONFIG_DATA_2; | |
| if (of_property_read_bool(np, "dynamic-power-switching")) | |
| hub->conf_data2 |= BIT(7); | |
| if (!of_property_read_u32(np, "oc-delay-us", &property_u32)) { | |
| if (property_u32 == 100) { | |
| /* 100 us*/ | |
| hub->conf_data2 &= ~BIT(5); | |
| hub->conf_data2 &= ~BIT(4); | |
| } else if (property_u32 == 4000) { | |
| /* 4 ms */ | |
| hub->conf_data2 &= ~BIT(5); | |
| hub->conf_data2 |= BIT(4); | |
| } else if (property_u32 == 16000) { | |
| /* 16 ms */ | |
| hub->conf_data2 |= BIT(5); | |
| hub->conf_data2 |= BIT(4); | |
| } else { | |
| /* 8 ms (DEFAULT) */ | |
| hub->conf_data2 |= BIT(5); | |
| hub->conf_data2 &= ~BIT(4); | |
| } | |
| } | |
| if (of_property_read_bool(np, "compound-device")) | |
| hub->conf_data2 |= BIT(3); | |
| hub->conf_data3 = USB251XB_DEF_CONFIG_DATA_3; | |
| if (of_property_read_bool(np, "port-mapping-mode")) | |
| hub->conf_data3 |= BIT(3); | |
| if (data->led_support && of_get_property(np, "led-usb-mode", NULL)) | |
| hub->conf_data3 &= ~BIT(1); | |
| if (of_property_read_bool(np, "string-support")) | |
| hub->conf_data3 |= BIT(0); | |
| hub->non_rem_dev = USB251XB_DEF_NON_REMOVABLE_DEVICES; | |
| usb251xb_get_ports_field(hub, "non-removable-ports", data->port_cnt, | |
| true, &hub->non_rem_dev); | |
| hub->port_disable_sp = USB251XB_DEF_PORT_DISABLE_SELF; | |
| usb251xb_get_ports_field(hub, "sp-disabled-ports", data->port_cnt, | |
| true, &hub->port_disable_sp); | |
| hub->port_disable_bp = USB251XB_DEF_PORT_DISABLE_BUS; | |
| usb251xb_get_ports_field(hub, "bp-disabled-ports", data->port_cnt, | |
| true, &hub->port_disable_bp); | |
| hub->max_power_sp = USB251XB_DEF_MAX_POWER_SELF; | |
| if (!of_property_read_u32(np, "sp-max-total-current-microamp", | |
| &property_u32)) | |
| hub->max_power_sp = min_t(u8, property_u32 / 2000, 50); | |
| hub->max_power_bp = USB251XB_DEF_MAX_POWER_BUS; | |
| if (!of_property_read_u32(np, "bp-max-total-current-microamp", | |
| &property_u32)) | |
| hub->max_power_bp = min_t(u8, property_u32 / 2000, 255); | |
| hub->max_current_sp = USB251XB_DEF_MAX_CURRENT_SELF; | |
| if (!of_property_read_u32(np, "sp-max-removable-current-microamp", | |
| &property_u32)) | |
| hub->max_current_sp = min_t(u8, property_u32 / 2000, 50); | |
| hub->max_current_bp = USB251XB_DEF_MAX_CURRENT_BUS; | |
| if (!of_property_read_u32(np, "bp-max-removable-current-microamp", | |
| &property_u32)) | |
| hub->max_current_bp = min_t(u8, property_u32 / 2000, 255); | |
| hub->power_on_time = USB251XB_DEF_POWER_ON_TIME; | |
| if (!of_property_read_u32(np, "power-on-time-ms", &property_u32)) | |
| hub->power_on_time = min_t(u8, property_u32 / 2, 255); | |
| if (of_property_read_u16(np, "language-id", &hub->lang_id)) | |
| hub->lang_id = USB251XB_DEF_LANGUAGE_ID; | |
| if (of_property_read_u8(np, "boost-up", &hub->boost_up)) | |
| hub->boost_up = USB251XB_DEF_BOOST_UP; | |
| cproperty_char = of_get_property(np, "manufacturer", NULL); | |
| strscpy(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); | |
| strscpy(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); | |
| strscpy(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 datasheet documents the register as 'Port Swap' but in real the | |
| * register controls the USB DP/DM signal swapping for each port. | |
| */ | |
| hub->port_swap = USB251XB_DEF_PORT_SWAP; | |
| usb251xb_get_ports_field(hub, "swap-dx-lanes", data->port_cnt, | |
| false, &hub->port_swap); | |
| /* 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_57 = USB251XB_DEF_BOOST_57; | |
| hub->boost_14 = USB251XB_DEF_BOOST_14; | |
| hub->port_map12 = USB251XB_DEF_PORT_MAP_12; | |
| hub->port_map34 = USB251XB_DEF_PORT_MAP_34; | |
| hub->port_map56 = USB251XB_DEF_PORT_MAP_56; | |
| hub->port_map7 = USB251XB_DEF_PORT_MAP_7; | |
| return 0; | |
| } | |
| static const struct of_device_id usb251xb_of_match[] = { | |
| { | |
| .compatible = "microchip,usb2422", | |
| .data = &usb2422_data, | |
| }, { | |
| .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, | |
| }, { | |
| .compatible = "microchip,usb2517", | |
| .data = &usb2517_data, | |
| }, { | |
| .compatible = "microchip,usb2517i", | |
| .data = &usb2517i_data, | |
| }, { | |
| /* sentinel */ | |
| } | |
| }; | |
| MODULE_DEVICE_TABLE(of, usb251xb_of_match); | |
| static void usb251xb_regulator_disable_action(void *data) | |
| { | |
| struct usb251xb *hub = data; | |
| regulator_disable(hub->vdd); | |
| } | |
| static int usb251xb_probe(struct usb251xb *hub) | |
| { | |
| struct device *dev = hub->dev; | |
| struct device_node *np = dev->of_node; | |
| const struct usb251xb_data *usb_data = of_device_get_match_data(dev); | |
| int err; | |
| if (np && usb_data) { | |
| err = usb251xb_get_ofdata(hub, usb_data); | |
| if (err) | |
| return dev_err_probe(dev, err, "failed to get ofdata\n"); | |
| } | |
| /* | |
| * usb251x SMBus-slave SCL lane is muxed with CFG_SEL0 pin. So if anyone | |
| * tries to work with the bus at the moment the hub reset is released, | |
| * it may cause an invalid config being latched by usb251x. Particularly | |
| * one of the config modes makes the hub loading a default registers | |
| * value without SMBus-slave interface activation. If the hub | |
| * accidentally gets this mode, this will cause the driver SMBus- | |
| * functions failure. Normally we could just lock the SMBus-segment the | |
| * hub i2c-interface resides for the device-specific reset timing. But | |
| * the GPIO controller, which is used to handle the hub reset, might be | |
| * placed at the same i2c-bus segment. In this case an error should be | |
| * returned since we can't safely use the GPIO controller to clear the | |
| * reset state (it may affect the hub configuration) and we can't lock | |
| * the i2c-bus segment (it will cause a deadlock). | |
| */ | |
| err = usb251x_check_gpio_chip(hub); | |
| if (err) | |
| return err; | |
| hub->vdd = devm_regulator_get(dev, "vdd"); | |
| if (IS_ERR(hub->vdd)) | |
| return PTR_ERR(hub->vdd); | |
| err = regulator_enable(hub->vdd); | |
| if (err) | |
| return err; | |
| err = devm_add_action_or_reset(dev, | |
| usb251xb_regulator_disable_action, hub); | |
| if (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) | |
| { | |
| 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 int usb251xb_suspend(struct usb251xb *hub) | |
| { | |
| return regulator_disable(hub->vdd); | |
| } | |
| static int usb251xb_resume(struct usb251xb *hub) | |
| { | |
| int err; | |
| err = regulator_enable(hub->vdd); | |
| if (err) | |
| return err; | |
| return usb251xb_connect(hub); | |
| } | |
| static int usb251xb_i2c_suspend(struct device *dev) | |
| { | |
| struct i2c_client *client = to_i2c_client(dev); | |
| struct usb251xb *hub = i2c_get_clientdata(client); | |
| return usb251xb_suspend(hub); | |
| } | |
| static int usb251xb_i2c_resume(struct device *dev) | |
| { | |
| struct i2c_client *client = to_i2c_client(dev); | |
| struct usb251xb *hub = i2c_get_clientdata(client); | |
| return usb251xb_resume(hub); | |
| } | |
| static DEFINE_SIMPLE_DEV_PM_OPS(usb251xb_i2c_pm_ops, usb251xb_i2c_suspend, usb251xb_i2c_resume); | |
| static const struct i2c_device_id usb251xb_id[] = { | |
| { .name = "usb2422" }, | |
| { .name = "usb2512b" }, | |
| { .name = "usb2512bi" }, | |
| { .name = "usb2513b" }, | |
| { .name = "usb2513bi" }, | |
| { .name = "usb2514b" }, | |
| { .name = "usb2514bi" }, | |
| { .name = "usb2517" }, | |
| { .name = "usb2517i" }, | |
| { /* sentinel */ } | |
| }; | |
| MODULE_DEVICE_TABLE(i2c, usb251xb_id); | |
| static struct i2c_driver usb251xb_i2c_driver = { | |
| .driver = { | |
| .name = DRIVER_NAME, | |
| .of_match_table = usb251xb_of_match, | |
| .pm = pm_sleep_ptr(&usb251xb_i2c_pm_ops), | |
| }, | |
| .probe = usb251xb_i2c_probe, | |
| .id_table = usb251xb_id, | |
| }; | |
| static int usb251xb_plat_probe(struct platform_device *pdev) | |
| { | |
| struct usb251xb *hub; | |
| hub = devm_kzalloc(&pdev->dev, sizeof(*hub), GFP_KERNEL); | |
| if (!hub) | |
| return -ENOMEM; | |
| platform_set_drvdata(pdev, hub); | |
| hub->dev = &pdev->dev; | |
| return usb251xb_probe(hub); | |
| } | |
| static int usb251xb_plat_suspend(struct device *dev) | |
| { | |
| return usb251xb_suspend(dev_get_drvdata(dev)); | |
| } | |
| static int usb251xb_plat_resume(struct device *dev) | |
| { | |
| return usb251xb_resume(dev_get_drvdata(dev)); | |
| } | |
| static DEFINE_SIMPLE_DEV_PM_OPS(usb251xb_plat_pm_ops, usb251xb_plat_suspend, usb251xb_plat_resume); | |
| static struct platform_driver usb251xb_plat_driver = { | |
| .driver = { | |
| .name = DRIVER_NAME, | |
| .of_match_table = usb251xb_of_match, | |
| .pm = pm_sleep_ptr(&usb251xb_plat_pm_ops), | |
| }, | |
| .probe = usb251xb_plat_probe, | |
| }; | |
| static int __init usb251xb_init(void) | |
| { | |
| int err; | |
| err = i2c_add_driver(&usb251xb_i2c_driver); | |
| if (err) | |
| return err; | |
| err = platform_driver_register(&usb251xb_plat_driver); | |
| if (err) { | |
| i2c_del_driver(&usb251xb_i2c_driver); | |
| return err; | |
| } | |
| return 0; | |
| } | |
| module_init(usb251xb_init); | |
| static void __exit usb251xb_exit(void) | |
| { | |
| platform_driver_unregister(&usb251xb_plat_driver); | |
| i2c_del_driver(&usb251xb_i2c_driver); | |
| } | |
| module_exit(usb251xb_exit); | |
| MODULE_AUTHOR("Richard Leitner <richard.leitner@skidata.com>"); | |
| MODULE_DESCRIPTION("USB251x/xBi USB 2.0 Hub Controller Driver"); | |
| MODULE_LICENSE("GPL"); |