diff options
Diffstat (limited to 'common/usb_onboard_hub.c')
| -rw-r--r-- | common/usb_onboard_hub.c | 195 |
1 files changed, 190 insertions, 5 deletions
diff --git a/common/usb_onboard_hub.c b/common/usb_onboard_hub.c index 68a04ac0412..6f28036e095 100644 --- a/common/usb_onboard_hub.c +++ b/common/usb_onboard_hub.c @@ -7,37 +7,203 @@ * Mostly inspired by Linux kernel v6.1 onboard_usb_hub driver */ +#include <asm/gpio.h> #include <dm.h> #include <dm/device_compat.h> +#include <i2c.h> +#include <linux/delay.h> #include <power/regulator.h> +#define USB5744_COMMAND_ATTACH 0x0056 +#define USB5744_COMMAND_ATTACH_LSB 0xAA +#define USB5744_CONFIG_REG_ACCESS 0x0037 +#define USB5744_CONFIG_REG_ACCESS_LSB 0x99 + struct onboard_hub { struct udevice *vdd; + struct gpio_desc *reset_gpio; +}; + +struct onboard_hub_data { + unsigned long reset_us; + unsigned long power_on_delay_us; + int (*init)(struct udevice *dev); }; +static int usb5744_i2c_init(struct udevice *dev) +{ + /* + * Prevent the MCU from the putting the HUB in suspend mode through register write. + * The BYPASS_UDC_SUSPEND bit (Bit 3) of the RuntimeFlags2 register at address + * 0x411D controls this aspect of the hub. + * Format to write to hub registers via SMBus- 2D 00 00 05 00 01 41 1D 08 + * Byte 0: Address of slave 2D + * Byte 1: Memory address 00 + * Byte 2: Memory address 00 + * Byte 3: Number of bytes to write to memory + * Byte 4: Write configuration register (00) + * Byte 5: Write the number of data bytes (01- 1 data byte) + * Byte 6: LSB of register address 0x41 + * Byte 7: MSB of register address 0x1D + * Byte 8: value to be written to the register + */ + u8 data_buf[8] = {0x0, 0x5, 0x0, 0x1, 0x41, 0x1D, 0x08}; + u8 config_reg_access_buf = USB5744_CONFIG_REG_ACCESS; + struct udevice *i2c_bus = NULL, *i2c_dev; + struct ofnode_phandle_args phandle; + u8 buf = USB5744_COMMAND_ATTACH; + struct dm_i2c_chip *i2c_chip; + int ret, slave_addr; + + ret = dev_read_phandle_with_args(dev, "i2c-bus", NULL, 0, 0, &phandle); + if (ret) { + dev_err(dev, "i2c-bus not specified\n"); + return ret; + } + + ret = device_get_global_by_ofnode(ofnode_get_parent(phandle.node), &i2c_bus); + if (ret) { + dev_err(dev, "Failed to get i2c node, err: %d\n", ret); + return ret; + } + + ret = ofnode_read_u32(phandle.node, "reg", &slave_addr); + if (ret) + return ret; + + ret = i2c_get_chip(i2c_bus, slave_addr, 1, &i2c_dev); + if (ret) { + dev_err(dev, "%s: can't find i2c chip device for addr 0x%x\n", __func__, + slave_addr); + return ret; + } + + i2c_chip = dev_get_parent_plat(i2c_dev); + if (!i2c_chip) { + dev_err(dev, "parent platform data not found\n"); + return -EINVAL; + } + + i2c_chip->flags &= ~DM_I2C_CHIP_WR_ADDRESS; + /* SMBus write command */ + ret = dm_i2c_write(i2c_dev, 0, (uint8_t *)&data_buf, 8); + if (ret) { + dev_err(dev, "data_buf i2c_write failed, err:%d\n", ret); + return ret; + } + + /* Configuration register access command */ + ret = dm_i2c_write(i2c_dev, USB5744_CONFIG_REG_ACCESS_LSB, + &config_reg_access_buf, 2); + if (ret) { + dev_err(dev, "config_reg_access i2c_write failed, err: %d\n", ret); + return ret; + } + + /* USB Attach with SMBus */ + ret = dm_i2c_write(i2c_dev, USB5744_COMMAND_ATTACH_LSB, &buf, 2); + if (ret) { + dev_err(dev, "usb_attach i2c_write failed, err: %d\n", ret); + return ret; + } + + return 0; +} + +int usb_onboard_hub_reset(struct udevice *dev) +{ + struct onboard_hub_data *data = + (struct onboard_hub_data *)dev_get_driver_data(dev); + struct onboard_hub *hub = dev_get_priv(dev); + int ret; + + hub->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_IS_OUT); + + /* property is optional, don't return error! */ + if (!hub->reset_gpio) + return 0; + + ret = dm_gpio_set_value(hub->reset_gpio, 1); + if (ret) + return ret; + + udelay(data->reset_us); + + ret = dm_gpio_set_value(hub->reset_gpio, 0); + if (ret) + return ret; + + udelay(data->power_on_delay_us); + + return 0; +} + static int usb_onboard_hub_probe(struct udevice *dev) { + struct onboard_hub_data *data = + (struct onboard_hub_data *)dev_get_driver_data(dev); struct onboard_hub *hub = dev_get_priv(dev); int ret; ret = device_get_supply_regulator(dev, "vdd-supply", &hub->vdd); - if (ret) { + if (ret && ret != -ENOENT) { dev_err(dev, "can't get vdd-supply: %d\n", ret); return ret; } - ret = regulator_set_enable_if_allowed(hub->vdd, true); + if (hub->vdd) { + ret = regulator_set_enable_if_allowed(hub->vdd, true); + if (ret && ret != -ENOSYS) { + dev_err(dev, "can't enable vdd-supply: %d\n", ret); + return ret; + } + } + + ret = usb_onboard_hub_reset(dev); if (ret) - dev_err(dev, "can't enable vdd-supply: %d\n", ret); + return ret; + if (data->init) { + ret = data->init(dev); + if (ret) { + dev_err(dev, "onboard i2c init failed: %d\n", ret); + goto err; + } + } + return 0; +err: + dm_gpio_set_value(hub->reset_gpio, 0); return ret; } +static int usb_onboard_hub_bind(struct udevice *dev) +{ + struct ofnode_phandle_args phandle; + const void *fdt = gd->fdt_blob; + int ret, off; + + ret = dev_read_phandle_with_args(dev, "peer-hub", NULL, 0, 0, &phandle); + if (ret) { + dev_err(dev, "peer-hub not specified\n"); + return ret; + } + + off = ofnode_to_offset(phandle.node); + ret = fdt_node_check_compatible(fdt, off, "usb424,5744"); + if (!ret) + return 0; + + return -ENODEV; +} + static int usb_onboard_hub_remove(struct udevice *dev) { struct onboard_hub *hub = dev_get_priv(dev); int ret; + if (hub->reset_gpio) + dm_gpio_free(hub->reset_gpio->dev, hub->reset_gpio); + ret = regulator_set_enable_if_allowed(hub->vdd, false); if (ret) dev_err(dev, "can't disable vdd-supply: %d\n", ret); @@ -45,15 +211,34 @@ static int usb_onboard_hub_remove(struct udevice *dev) return ret; } +static const struct onboard_hub_data usb2514_data = { + .power_on_delay_us = 500, + .reset_us = 1, +}; + +static const struct onboard_hub_data usb5744_data = { + .init = usb5744_i2c_init, + .power_on_delay_us = 1000, + .reset_us = 5, +}; + static const struct udevice_id usb_onboard_hub_ids[] = { /* Use generic usbVID,PID dt-bindings (usb-device.yaml) */ - { .compatible = "usb424,2514" }, /* USB2514B USB 2.0 */ - { } + { .compatible = "usb424,2514", /* USB2514B USB 2.0 */ + .data = (ulong)&usb2514_data, + }, { + .compatible = "usb424,2744", /* USB2744 USB 2.0 */ + .data = (ulong)&usb5744_data, + }, { + .compatible = "usb424,5744", /* USB5744 USB 3.0 */ + .data = (ulong)&usb5744_data, + } }; U_BOOT_DRIVER(usb_onboard_hub) = { .name = "usb_onboard_hub", .id = UCLASS_USB_HUB, + .bind = usb_onboard_hub_bind, .probe = usb_onboard_hub_probe, .remove = usb_onboard_hub_remove, .of_match = usb_onboard_hub_ids, |