[usb_uart] Implement USB Host mode UART (#8334)

esphome/components/usb_host/__init__.py

@@ -0,0 +1,64 @@
+import esphome.codegen as cg
+from esphome.components.esp32 import (
+    VARIANT_ESP32S2,
+    VARIANT_ESP32S3,
+    add_idf_sdkconfig_option,
+    only_on_variant,
+)
+import esphome.config_validation as cv
+from esphome.const import CONF_ID
+from esphome.cpp_types import Component
+
+AUTO_LOAD = ["bytebuffer"]
+CODEOWNERS = ["@clydebarrow"]
+DEPENDENCIES = ["esp32"]
+usb_host_ns = cg.esphome_ns.namespace("usb_host")
+USBHost = usb_host_ns.class_("USBHost", Component)
+USBClient = usb_host_ns.class_("USBClient", Component)
+
+CONF_DEVICES = "devices"
+CONF_VID = "vid"
+CONF_PID = "pid"
+
+
+def usb_device_schema(cls=USBClient, vid: int = None, pid: [int] = None) -> cv.Schema:
+    schema = cv.COMPONENT_SCHEMA.extend(
+        {
+            cv.GenerateID(): cv.declare_id(cls),
+        }
+    )
+    if vid:
+        schema = schema.extend({cv.Optional(CONF_VID, default=vid): cv.hex_uint16_t})
+    else:
+        schema = schema.extend({cv.Required(CONF_VID): cv.hex_uint16_t})
+    if pid:
+        schema = schema.extend({cv.Optional(CONF_PID, default=pid): cv.hex_uint16_t})
+    else:
+        schema = schema.extend({cv.Required(CONF_PID): cv.hex_uint16_t})
+    return schema
+
+
+CONFIG_SCHEMA = cv.All(
+    cv.COMPONENT_SCHEMA.extend(
+        {
+            cv.GenerateID(): cv.declare_id(USBHost),
+            cv.Optional(CONF_DEVICES): cv.ensure_list(usb_device_schema()),
+        }
+    ),
+    cv.only_with_esp_idf,
+    only_on_variant(supported=[VARIANT_ESP32S2, VARIANT_ESP32S3]),
+)
+
+
+async def register_usb_client(config):
+    var = cg.new_Pvariable(config[CONF_ID], config[CONF_VID], config[CONF_PID])
+    await cg.register_component(var, config)
+    return var
+
+
+async def to_code(config):
+    add_idf_sdkconfig_option("CONFIG_USB_HOST_CONTROL_TRANSFER_MAX_SIZE", 1024)
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
+    for device in config.get(CONF_DEVICES) or ():
+        await register_usb_client(device)