This commit rearranges the USBH functions into new groupings to provide a
clearer abstraction. This is in preparation for refactoring/removing the Hub
related functions in the USBH API. This commit DOES NOT MAKE ANY BEHAVIORAL
CHANGES to the code.
Functions are now grouped into...
- USBH Processing: Functions dealing with overall USBH processing
- Device Pool: Functions that add/remove/open/close devices from the internal
device pool
- Device: Functions that pertain to setting/getting a particular device
- Endpoints: Functions that pertain to a particular endpoint
- Transfer: Functions that pertain to sending transfers
Previously, on a device disconnection, the USBH and Hub would the require the
following 2-way interaction:
- Hub -> usbh_hub_pass_event() -> USBH to indicate a port error
- USBH -> usbh_hub_req_cb_t -> Hub to request port recovery after the device
has been freed.
The 2-way interaction has been simplified:
- USBH now nofities upper layers of devices being freed via the
USBH_EVENT_DEV_FREE event
- Hub now handles port recovery only after a device has been freed
This commit does the following:
- Updates the USBH event callback arguments to now pass a usbh_event_data_t
which can contain different data for each event
- Updated event names
This commit fixes a bug where if multiple concurrent USBH API calls trigger
multiple events on the same device, some events will be lost. As a result,
those lost events don't get processed by the subsequent usbh_process() call.
This commit refactors the USBH and the USB Host Library in the following ways:
- USBH now presents an abstraction of an endpoint (via usbh_ep_handle_t)
- Added separate functions to enqueue/dequeue URBs to a particular endpoint
- USB Host Library no longer calls HCD API directly. Calls USBH endpoint API
instead.
- Renamed "notif_cb" to "proc_req_cb" (Processing Request Callback)
- This is to avoid confusion with FreerTOS task notifications and Host
Library client event notifications.
- The processing functions of each layer (i.e., "xxx_process()") request
calls via the "proc_req_cb"
- The main handling function (i.e., usb_host_lib_handle_events()) is
responsible for calling the required "xxx_process()" of each layer
This commit updates the USB Host Library as follows:
- usb_helpers.h
- Removed dependency on USB Host Library API
- Added function to print string descriptors
- usbh
- Fixed bug where an interface/endpoint could be claimed/allocated multiple times
- Removed redundant device ref_count change
- Added unit test for USB Host Library API usage
This commit updates the Hub Driver and USBH as follows:
- Updated communication mechanism between Hub Driver and USBH
- USBH notifies the Hub Driver via Hub request callback (usbh_hub_req_cb_t)
- Hub Driver notifies the USBH via usbh_hub_pass_event()
- Hub Driver now defers all event handling to hub_process.
- Hub Driver and USBH will now automatically recover the port after a disconnected
device has been closed.
- Fixed incorrect assert in usbh_dev_close()
Hub Driver is refactored as follows:
This commit update and refactors the Hub Driver as follows:
- Refactored enumeration state machine and stage functions
- Enumeration stage is now incremented
- Combined transfer stages of enumeration into common functions
- Comments updated
- Fixed usbh_hal_disable_debounce_lock() that would cause root_port_handle_events()
to fail the HCD_PORT_CMD_RESET call because the previous port connection interrupt
was not cleared.
The following features were added to the Hub Driver
- Enumeration config descriptor is now fetched in two separate stages
- Header is fetched first to determine the wTotalLength of the descriptor
- Fetching the full descriptor will request exactly wTotalLength bytes
- This works around some non-compliant devices that will babble/return zero
when requesting a length > wTotalLength
- Closes https://github.com/espressif/esp-idf/issues/7799
- Enumeration now stores string descriptors
- The Manufacturer, Product, and Serial Number string descriptors are
now read and stored during enumeration
- String descriptors are now part of usb_device_info_t
- Added unit test to test enumeration
This commit updates the USB Host Library API in the following wasy:
- usb_host_client_handle_t and usb_device_handle_t made into struct pointers
to generate compiler warnings about conflicting handle types
- usb_host_client_config_t changed to future proof API for Synchronous Clients
- Added usb_host_lib_unblock()
- Added usb_host_device_addr_list_fill()
- Return of usb_host_device_free_all() updated to indicate whether there
are still devices yet to be freed.
- Blockg APIs are now marked explicitly
- Fixed a bug in usb_host_transfer_submit_control() when checking the bEndpointAddress
of a control transfer.
Tests are also refactored to move some common macros into shared headers
Closes https://github.com/espressif/esp-idf/issues/7786
This commit fixes how the USBH handling of a sudden device disconnection,
more specifically handling of device gone.
- Previously the USBH would only halt, flush, and dequeue the device's
default EP, then send a device gone event to the Host Library layer.
- Now the USBH will also halt and flush all non-default EPs, allowing
all of the URBs to be dequeud.
- Some internal object members are now protected by a mutex instead of
a spinlock.
Closes https://github.com/espressif/esp-idf/issues/7505
- This commit adds the API documentation for the USB Host Library.
- Warnings about the beta API are also added.
- usb_host_misc.h renamed to usb_helpers.h
This commit adds the preliminary version of the USB Host Library. This commit contains:
- USBH (USB Host Driver)
- Hub Driver that only supports a single device and device enumeration
- USB Host Library (asychronous API)
- Test cases for USB Host Library asychronous API
The following changes were made to the existing HCD:
- Removed HCD_PIPE_STATE_INVALID. Pipes are no longer invalidated
- Changed pipe commands to halt, flush, and clear. Pipes need to be manually
halted, flush, and cleared.
- Halting and flushing a pipe will execute the pipe callback if it causes a
HCD_PIPE_EVENT_URB_DONE event
