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esp-idf/components/usb/usbh.c
Darian Leung a602befe1b refactor(usb/usbh): Update USBH device creation and enumeration handling 
This commit updates how the USBH handles device creation and enumeration so that
upper layers (such as the Hub driver) can use the USBH API for enumeration instead
of calling the HCD.

USBH Updates:

USBH now creates unenumerated devices set to address 0 with no device/config
descriptor. A newly created device can be opened and communicated with immediately
(using control transfers). This allows the Hub driver to call the USBH instead of
the HCD. Summary of USBH changes:

- Added new APIs to add/remove a device. Devices are now created as unenumerated
and can be immediately opened and communicated with.
- Added new APIs to enumerate a device (see 'usbh_dev_set_...()' functions). Device
must be locked (see 'usbh_dev_enum_lock()') before enumeration functions can be called.
- Added UID for each device. This allows the particular USBH without needing to
use the device's handle (which implies opening the device).

Hub Driver Updates:

Hub driver now calls the USBH for enumeration. Summary of USBH changes:

- Replace all 'hcd_pipe_...()' calls with 'usbh_dev_...()' calls
- Refactored port event handling to fit with new USBH API
- Updated to use UID to uniquely identify devices without opening them

USB Host Updates:

- Reroute USBH control transfers to clients and hub driver
2024-07-24 15:21:02 +08:00

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/*
* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "sdkconfig.h"
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include <sys/queue.h>
#include "freertos/FreeRTOS.h"
#include "freertos/portmacro.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "esp_err.h"
#include "esp_log.h"
#include "esp_heap_caps.h"
#include "hcd.h"
#include "usbh.h"
#include "usb/usb_helpers.h"
#include "usb/usb_types_ch9.h"
#define EP_NUM_MIN 1 // The smallest possible non-default endpoint number
#define EP_NUM_MAX 16 // The largest possible non-default endpoint number
#define NUM_NON_DEFAULT_EP ((EP_NUM_MAX - 1) * 2) // The total number of non-default endpoints a device can have.
// Device action flags. LISTED IN THE ORDER THEY SHOULD BE HANDLED IN within usbh_process(). Some actions are mutually exclusive
typedef enum {
DEV_ACTION_EPn_HALT_FLUSH = (1 << 0), // Halt all non-default endpoints then flush them (called after a device gone is gone)
DEV_ACTION_EP0_FLUSH = (1 << 1), // Retire all URBS submitted to EP0
DEV_ACTION_EP0_DEQUEUE = (1 << 2), // Dequeue all URBs from EP0
DEV_ACTION_EP0_CLEAR = (1 << 3), // Move EP0 to the the active state
DEV_ACTION_PROP_GONE_EVT = (1 << 4), // Propagate a USBH_EVENT_DEV_GONE event
DEV_ACTION_FREE = (1 << 5), // Free the device object
DEV_ACTION_PROP_NEW_DEV = (1 << 6), // Propagate a USBH_EVENT_NEW_DEV event
} dev_action_t;
typedef struct device_s device_t;
typedef struct {
struct {
usbh_ep_cb_t ep_cb;
void *ep_cb_arg;
hcd_pipe_handle_t pipe_hdl;
device_t *dev; // Pointer to the device object that this endpoint is contained in
const usb_ep_desc_t *ep_desc; // This just stores a pointer endpoint descriptor inside the device's "config_desc"
} constant;
} endpoint_t;
struct device_s {
// Dynamic members require a critical section
struct {
TAILQ_ENTRY(device_s) tailq_entry;
union {
struct {
uint32_t in_pending_list: 1;
uint32_t is_gone: 1; // Device is gone (disconnected or port error)
uint32_t waiting_free: 1; // Device object is awaiting to be freed
uint32_t enum_lock: 1; // Device is locked for enumeration. Enum information (e.g., address, device/config desc etc) may change
uint32_t reserved28: 28;
};
uint32_t val;
} flags;
uint32_t action_flags;
int num_ctrl_xfers_inflight;
usb_device_state_t state;
uint32_t open_count;
} dynamic;
// Mux protected members must be protected by the USBH mux_lock when accessed
struct {
/*
- Endpoint object pointers for each possible non-default endpoint
- All OUT EPs are listed before IN EPs (i.e., EP_NUM_MIN OUT ... EP_NUM_MAX OUT ... EP_NUM_MIN IN ... EP_NUM_MAX)
*/
endpoint_t *endpoints[NUM_NON_DEFAULT_EP];
} mux_protected;
// Constant members do not require a critical section
struct {
// Assigned on device allocation and remain constant for the device's lifetime
hcd_pipe_handle_t default_pipe;
hcd_port_handle_t port_hdl;
usb_speed_t speed;
unsigned int uid;
/*
These fields are can only be changed when enum_lock is set, thus can be treated as constant
*/
uint8_t address;
usb_device_desc_t *desc;
usb_config_desc_t *config_desc;
usb_str_desc_t *str_desc_manu;
usb_str_desc_t *str_desc_product;
usb_str_desc_t *str_desc_ser_num;
} constant;
};
typedef struct {
// Dynamic members require a critical section
struct {
TAILQ_HEAD(tailhead_devs, device_s) devs_idle_tailq; // Tailq of all enum and configured devices
TAILQ_HEAD(tailhead_devs_cb, device_s) devs_pending_tailq; // Tailq of devices that need to have their cb called
} dynamic;
// Mux protected members must be protected by the USBH mux_lock when accessed
struct {
uint8_t num_device; // Number of enumerated devices
} mux_protected;
// Constant members do no change after installation thus do not require a critical section
struct {
usb_proc_req_cb_t proc_req_cb;
void *proc_req_cb_arg;
usbh_event_cb_t event_cb;
void *event_cb_arg;
SemaphoreHandle_t mux_lock;
} constant;
} usbh_t;
static usbh_t *p_usbh_obj = NULL;
static portMUX_TYPE usbh_lock = portMUX_INITIALIZER_UNLOCKED;
const char *USBH_TAG = "USBH";
#define USBH_ENTER_CRITICAL_ISR() portENTER_CRITICAL_ISR(&usbh_lock)
#define USBH_EXIT_CRITICAL_ISR() portEXIT_CRITICAL_ISR(&usbh_lock)
#define USBH_ENTER_CRITICAL() portENTER_CRITICAL(&usbh_lock)
#define USBH_EXIT_CRITICAL() portEXIT_CRITICAL(&usbh_lock)
#define USBH_ENTER_CRITICAL_SAFE() portENTER_CRITICAL_SAFE(&usbh_lock)
#define USBH_EXIT_CRITICAL_SAFE() portEXIT_CRITICAL_SAFE(&usbh_lock)
#define USBH_CHECK(cond, ret_val) ({ \
if (!(cond)) { \
return (ret_val); \
} \
})
#define USBH_CHECK_FROM_CRIT(cond, ret_val) ({ \
if (!(cond)) { \
USBH_EXIT_CRITICAL(); \
return ret_val; \
} \
})
// ------------------------------------------------- Forward Declare ---------------------------------------------------
static bool ep0_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr);
static bool epN_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr);
static bool _dev_set_actions(device_t *dev_obj, uint32_t action_flags);
// ----------------------------------------------------- Helpers -------------------------------------------------------
static device_t *_find_dev_from_uid(unsigned int uid)
{
/*
THIS FUNCTION MUST BE CALLED FROM A CRITICAL SECTION
*/
device_t *dev_iter;
// Search the device lists for a device with the specified address
TAILQ_FOREACH(dev_iter, &p_usbh_obj->dynamic.devs_idle_tailq, dynamic.tailq_entry) {
if (dev_iter->constant.uid == uid) {
return dev_iter;
}
}
TAILQ_FOREACH(dev_iter, &p_usbh_obj->dynamic.devs_pending_tailq, dynamic.tailq_entry) {
if (dev_iter->constant.uid == uid) {
return dev_iter;
}
}
return NULL;
}
static device_t *_find_dev_from_addr(uint8_t dev_addr)
{
/*
THIS FUNCTION MUST BE CALLED FROM A CRITICAL SECTION
*/
device_t *dev_iter;
// Search the device lists for a device with the specified address
TAILQ_FOREACH(dev_iter, &p_usbh_obj->dynamic.devs_idle_tailq, dynamic.tailq_entry) {
if (dev_iter->constant.address == dev_addr) {
return dev_iter;
}
}
TAILQ_FOREACH(dev_iter, &p_usbh_obj->dynamic.devs_pending_tailq, dynamic.tailq_entry) {
if (dev_iter->constant.address == dev_addr) {
return dev_iter;
}
}
return NULL;
}
static inline bool check_ep_addr(uint8_t bEndpointAddress)
{
/*
Check that the bEndpointAddress is valid
- Must be <= EP_NUM_MAX (e.g., 16)
- Must be >= EP_NUM_MIN (e.g., 1).
- EP0 is the owned/managed by USBH, thus must never by directly addressed by users (see USB 2.0 section 10.5.1.2)
*/
uint8_t addr = bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_NUM_MASK;
return (addr >= EP_NUM_MIN) && (addr <= EP_NUM_MAX);
}
static endpoint_t *get_ep_from_addr(device_t *dev_obj, uint8_t bEndpointAddress)
{
/*
CALLER IS RESPONSIBLE FOR TAKING THE mux_lock
*/
// Calculate index to the device's endpoint object list
int index;
// EP_NUM_MIN should map to an index of 0
index = (bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_NUM_MASK) - EP_NUM_MIN;
assert(index >= 0); // Endpoint address is not supported
if (bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_DIR_MASK) {
// OUT EPs are listed before IN EPs, so add an offset
index += (EP_NUM_MAX - EP_NUM_MIN);
}
return dev_obj->mux_protected.endpoints[index];
}
static inline void set_ep_from_addr(device_t *dev_obj, uint8_t bEndpointAddress, endpoint_t *ep_obj)
{
/*
CALLER IS RESPONSIBLE FOR TAKING THE mux_lock
*/
// Calculate index to the device's endpoint object list
int index;
// EP_NUM_MIN should map to an index of 0
index = (bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_NUM_MASK) - EP_NUM_MIN;
assert(index >= 0); // Endpoint address is not supported
if (bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_DIR_MASK) {
// OUT EPs are listed before IN EPs, so add an offset
index += (EP_NUM_MAX - EP_NUM_MIN);
}
dev_obj->mux_protected.endpoints[index] = ep_obj;
}
static bool urb_check_args(urb_t *urb)
{
if (urb->transfer.callback == NULL) {
ESP_LOGE(USBH_TAG, "usb_transfer_t callback is NULL");
return false;
}
if (urb->transfer.num_bytes > urb->transfer.data_buffer_size) {
ESP_LOGE(USBH_TAG, "usb_transfer_t num_bytes > data_buffer_size");
return false;
}
return true;
}
static bool transfer_check_usb_compliance(usb_transfer_t *transfer, usb_transfer_type_t type, unsigned int mps, bool is_in)
{
if (type == USB_TRANSFER_TYPE_CTRL) {
// Check that num_bytes and wLength are set correctly
usb_setup_packet_t *setup_pkt = (usb_setup_packet_t *)transfer->data_buffer;
bool mismatch = false;
if (is_in) {
// For IN transfers, 'num_bytes >= sizeof(usb_setup_packet_t) + setup_pkt->wLength' due to MPS rounding
mismatch = (transfer->num_bytes < sizeof(usb_setup_packet_t) + setup_pkt->wLength);
} else {
// For OUT transfers, num_bytes must match 'sizeof(usb_setup_packet_t) + setup_pkt->wLength'
mismatch = (transfer->num_bytes != sizeof(usb_setup_packet_t) + setup_pkt->wLength);
}
if (mismatch) {
ESP_LOGE(USBH_TAG, "usb_transfer_t num_bytes %d and usb_setup_packet_t wLength %d mismatch", transfer->num_bytes, setup_pkt->wLength);
return false;
}
} else if (type == USB_TRANSFER_TYPE_ISOCHRONOUS) {
// Check that there is at least one isochronous packet descriptor
if (transfer->num_isoc_packets <= 0) {
ESP_LOGE(USBH_TAG, "usb_transfer_t num_isoc_packets is 0");
return false;
}
// Check that sum of all packet lengths add up to transfer length
// If IN, check that each packet length is integer multiple of MPS
int total_num_bytes = 0;
bool mod_mps_all_zero = true;
for (int i = 0; i < transfer->num_isoc_packets; i++) {
total_num_bytes += transfer->isoc_packet_desc[i].num_bytes;
if (transfer->isoc_packet_desc[i].num_bytes % mps != 0) {
mod_mps_all_zero = false;
}
}
if (transfer->num_bytes != total_num_bytes) {
ESP_LOGE(USBH_TAG, "ISOC transfer num_bytes != num_bytes of all packets");
return false;
}
if (is_in && !mod_mps_all_zero) {
ESP_LOGE(USBH_TAG, "ISOC IN num_bytes not integer multiple of MPS");
return false;
}
} else {
// Check that IN transfers are integer multiple of MPS
if (is_in && (transfer->num_bytes % mps != 0)) {
ESP_LOGE(USBH_TAG, "IN transfer num_bytes not integer multiple of MPS");
return false;
}
}
return true;
}
// --------------------------------------------------- Allocation ------------------------------------------------------
static esp_err_t endpoint_alloc(device_t *dev_obj, const usb_ep_desc_t *ep_desc, usbh_ep_config_t *ep_config, endpoint_t **ep_obj_ret)
{
esp_err_t ret;
endpoint_t *ep_obj;
hcd_pipe_handle_t pipe_hdl;
ep_obj = heap_caps_calloc(1, sizeof(endpoint_t), MALLOC_CAP_DEFAULT);
if (ep_obj == NULL) {
return ESP_ERR_NO_MEM;
}
// Allocate the EP's underlying pipe
hcd_pipe_config_t pipe_config = {
.callback = epN_pipe_callback,
.callback_arg = (void *)ep_obj,
.context = ep_config->context,
.ep_desc = ep_desc,
.dev_speed = dev_obj->constant.speed,
.dev_addr = dev_obj->constant.address,
};
ret = hcd_pipe_alloc(dev_obj->constant.port_hdl, &pipe_config, &pipe_hdl);
if (ret != ESP_OK) {
goto pipe_err;
}
// Initialize the endpoint object
ep_obj->constant.pipe_hdl = pipe_hdl;
ep_obj->constant.ep_cb = ep_config->ep_cb;
ep_obj->constant.ep_cb_arg = ep_config->ep_cb_arg;
ep_obj->constant.dev = dev_obj;
ep_obj->constant.ep_desc = ep_desc;
// Return the endpoint object
*ep_obj_ret = ep_obj;
ret = ESP_OK;
return ret;
pipe_err:
heap_caps_free(ep_obj);
return ret;
}
static void endpoint_free(endpoint_t *ep_obj)
{
if (ep_obj == NULL) {
return;
}
// Deallocate the EP's underlying pipe
ESP_ERROR_CHECK(hcd_pipe_free(ep_obj->constant.pipe_hdl));
// Free the heap object
heap_caps_free(ep_obj);
}
static esp_err_t device_alloc(unsigned int uid,
usb_speed_t speed,
hcd_port_handle_t port_hdl,
device_t **dev_obj_ret)
{
device_t *dev_obj = heap_caps_calloc(1, sizeof(device_t), MALLOC_CAP_DEFAULT);
if (dev_obj == NULL) {
return ESP_ERR_NO_MEM;
}
esp_err_t ret;
// Allocate a pipe for EP0
hcd_pipe_config_t pipe_config = {
.callback = ep0_pipe_callback,
.callback_arg = (void *)dev_obj,
.context = (void *)dev_obj,
.ep_desc = NULL, // No endpoint descriptor means we're allocating a pipe for EP0
.dev_speed = speed,
.dev_addr = 0,
};
hcd_pipe_handle_t default_pipe_hdl;
ret = hcd_pipe_alloc(port_hdl, &pipe_config, &default_pipe_hdl);
if (ret != ESP_OK) {
goto err;
}
// Initialize device object
dev_obj->dynamic.state = USB_DEVICE_STATE_DEFAULT;
dev_obj->constant.default_pipe = default_pipe_hdl;
dev_obj->constant.port_hdl = port_hdl;
dev_obj->constant.speed = speed;
dev_obj->constant.uid = uid;
// Note: Enumeration related dev_obj->constant fields are initialized later using usbh_dev_set_...() functions
// Write-back device object
*dev_obj_ret = dev_obj;
ret = ESP_OK;
return ret;
err:
heap_caps_free(dev_obj);
return ret;
}
static void device_free(device_t *dev_obj)
{
if (dev_obj == NULL) {
return;
}
// Device descriptor might not have been set yet
if (dev_obj->constant.desc) {
heap_caps_free(dev_obj->constant.desc);
}
// Configuration descriptor might not have been set yet
if (dev_obj->constant.config_desc) {
heap_caps_free(dev_obj->constant.config_desc);
}
// String descriptors might not have been set yet
if (dev_obj->constant.str_desc_manu) {
heap_caps_free(dev_obj->constant.str_desc_manu);
}
if (dev_obj->constant.str_desc_product) {
heap_caps_free(dev_obj->constant.str_desc_product);
}
if (dev_obj->constant.str_desc_ser_num) {
heap_caps_free(dev_obj->constant.str_desc_ser_num);
}
ESP_ERROR_CHECK(hcd_pipe_free(dev_obj->constant.default_pipe));
heap_caps_free(dev_obj);
}
// ---------------------------------------------------- Callbacks ------------------------------------------------------
static bool ep0_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr)
{
uint32_t action_flags;
device_t *dev_obj = (device_t *)user_arg;
switch (pipe_event) {
case HCD_PIPE_EVENT_URB_DONE:
// A control transfer completed on EP0's pipe . We need to dequeue it
action_flags = DEV_ACTION_EP0_DEQUEUE;
break;
case HCD_PIPE_EVENT_ERROR_XFER:
case HCD_PIPE_EVENT_ERROR_URB_NOT_AVAIL:
case HCD_PIPE_EVENT_ERROR_OVERFLOW:
// EP0's pipe has encountered an error. We need to retire all URBs, dequeue them, then make the pipe active again
action_flags = DEV_ACTION_EP0_FLUSH |
DEV_ACTION_EP0_DEQUEUE |
DEV_ACTION_EP0_CLEAR;
if (in_isr) {
ESP_EARLY_LOGE(USBH_TAG, "Dev %d EP 0 Error", dev_obj->constant.address);
} else {
ESP_LOGE(USBH_TAG, "Dev %d EP 0 Error", dev_obj->constant.address);
}
break;
case HCD_PIPE_EVENT_ERROR_STALL:
// EP0's pipe encountered a "protocol stall". We just need to dequeue URBs then make the pipe active again
action_flags = DEV_ACTION_EP0_DEQUEUE | DEV_ACTION_EP0_CLEAR;
if (in_isr) {
ESP_EARLY_LOGE(USBH_TAG, "Dev %d EP 0 STALL", dev_obj->constant.address);
} else {
ESP_LOGE(USBH_TAG, "Dev %d EP 0 STALL", dev_obj->constant.address);
}
break;
default:
action_flags = 0;
break;
}
USBH_ENTER_CRITICAL_SAFE();
bool call_proc_req_cb = _dev_set_actions(dev_obj, action_flags);
USBH_EXIT_CRITICAL_SAFE();
bool yield = false;
if (call_proc_req_cb) {
yield = p_usbh_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_USBH, in_isr, p_usbh_obj->constant.proc_req_cb_arg);
}
return yield;
}
static bool epN_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr)
{
endpoint_t *ep_obj = (endpoint_t *)user_arg;
return ep_obj->constant.ep_cb((usbh_ep_handle_t)ep_obj,
(usbh_ep_event_t)pipe_event,
ep_obj->constant.ep_cb_arg,
in_isr);
}
// -------------------------------------------------- Event Related ----------------------------------------------------
static bool _dev_set_actions(device_t *dev_obj, uint32_t action_flags)
{
/*
THIS FUNCTION MUST BE CALLED FROM A CRITICAL SECTION
*/
if (action_flags == 0) {
return false;
}
bool call_proc_req_cb;
// Check if device is already on the callback list
if (!dev_obj->dynamic.flags.in_pending_list) {
// Move device form idle device list to callback device list
TAILQ_REMOVE(&p_usbh_obj->dynamic.devs_idle_tailq, dev_obj, dynamic.tailq_entry);
TAILQ_INSERT_TAIL(&p_usbh_obj->dynamic.devs_pending_tailq, dev_obj, dynamic.tailq_entry);
dev_obj->dynamic.action_flags |= action_flags;
dev_obj->dynamic.flags.in_pending_list = 1;
call_proc_req_cb = true;
} else {
// The device is already on the callback list, thus a processing request is already pending.
dev_obj->dynamic.action_flags |= action_flags;
call_proc_req_cb = false;
}
return call_proc_req_cb;
}
static inline void handle_epn_halt_flush(device_t *dev_obj)
{
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
// Halt then flush all non-default EPs
for (int i = 0; i < NUM_NON_DEFAULT_EP; i++) {
if (dev_obj->mux_protected.endpoints[i] != NULL) {
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->mux_protected.endpoints[i]->constant.pipe_hdl, HCD_PIPE_CMD_HALT));
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->mux_protected.endpoints[i]->constant.pipe_hdl, HCD_PIPE_CMD_FLUSH));
}
}
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
}
static inline void handle_ep0_flush(device_t *dev_obj)
{
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->constant.default_pipe, HCD_PIPE_CMD_HALT));
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->constant.default_pipe, HCD_PIPE_CMD_FLUSH));
}
static inline void handle_ep0_dequeue(device_t *dev_obj)
{
// Empty URBs from EP0's pipe and call the control transfer callback
ESP_LOGD(USBH_TAG, "Default pipe device %d", dev_obj->constant.address);
int num_urbs = 0;
urb_t *urb = hcd_urb_dequeue(dev_obj->constant.default_pipe);
while (urb != NULL) {
num_urbs++;
usbh_event_data_t event_data = {
.event = USBH_EVENT_CTRL_XFER,
.ctrl_xfer_data = {
.dev_hdl = (usb_device_handle_t)dev_obj,
.urb = urb,
},
};
p_usbh_obj->constant.event_cb(&event_data, p_usbh_obj->constant.event_cb_arg);
urb = hcd_urb_dequeue(dev_obj->constant.default_pipe);
}
USBH_ENTER_CRITICAL();
dev_obj->dynamic.num_ctrl_xfers_inflight -= num_urbs;
USBH_EXIT_CRITICAL();
}
static inline void handle_ep0_clear(device_t *dev_obj)
{
// We allow the pipe command to fail just in case the pipe becomes invalid mid command
hcd_pipe_command(dev_obj->constant.default_pipe, HCD_PIPE_CMD_CLEAR);
}
static inline void handle_prop_gone_evt(device_t *dev_obj)
{
// Flush EP0's pipe. Then propagate a USBH_EVENT_DEV_GONE event
ESP_LOGE(USBH_TAG, "Device %d gone", dev_obj->constant.address);
usbh_event_data_t event_data = {
.event = USBH_EVENT_DEV_GONE,
.dev_gone_data = {
.dev_addr = dev_obj->constant.address,
.dev_hdl = (usb_device_handle_t)dev_obj,
},
};
p_usbh_obj->constant.event_cb(&event_data, p_usbh_obj->constant.event_cb_arg);
}
static inline void handle_free(device_t *dev_obj)
{
// Cache a copy of the device's address as we are about to free the device object
const unsigned int dev_uid = dev_obj->constant.uid;
bool all_free;
ESP_LOGD(USBH_TAG, "Freeing device %d", dev_obj->constant.address);
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
USBH_ENTER_CRITICAL();
// Remove the device object for it's containing list
if (dev_obj->dynamic.flags.in_pending_list) {
dev_obj->dynamic.flags.in_pending_list = 0;
TAILQ_REMOVE(&p_usbh_obj->dynamic.devs_pending_tailq, dev_obj, dynamic.tailq_entry);
} else {
TAILQ_REMOVE(&p_usbh_obj->dynamic.devs_idle_tailq, dev_obj, dynamic.tailq_entry);
}
USBH_EXIT_CRITICAL();
p_usbh_obj->mux_protected.num_device--;
all_free = (p_usbh_obj->mux_protected.num_device == 0);
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
device_free(dev_obj);
// Propagate USBH_EVENT_DEV_FREE event
usbh_event_data_t event_data = {
.event = USBH_EVENT_DEV_FREE,
.dev_free_data = {
.dev_uid = dev_uid,
}
};
p_usbh_obj->constant.event_cb(&event_data, p_usbh_obj->constant.event_cb_arg);
// If all devices have been freed, propagate a USBH_EVENT_ALL_FREE event
if (all_free) {
ESP_LOGD(USBH_TAG, "Device all free");
event_data.event = USBH_EVENT_ALL_FREE;
p_usbh_obj->constant.event_cb(&event_data, p_usbh_obj->constant.event_cb_arg);
}
}
static inline void handle_prop_new_dev(device_t *dev_obj)
{
ESP_LOGD(USBH_TAG, "New device %d", dev_obj->constant.address);
usbh_event_data_t event_data = {
.event = USBH_EVENT_NEW_DEV,
.new_dev_data = {
.dev_addr = dev_obj->constant.address,
},
};
p_usbh_obj->constant.event_cb(&event_data, p_usbh_obj->constant.event_cb_arg);
}
// -------------------------------------------- USBH Processing Functions ----------------------------------------------
esp_err_t usbh_install(const usbh_config_t *usbh_config)
{
USBH_CHECK(usbh_config != NULL, ESP_ERR_INVALID_ARG);
USBH_ENTER_CRITICAL();
USBH_CHECK_FROM_CRIT(p_usbh_obj == NULL, ESP_ERR_INVALID_STATE);
USBH_EXIT_CRITICAL();
esp_err_t ret;
usbh_t *usbh_obj = heap_caps_calloc(1, sizeof(usbh_t), MALLOC_CAP_DEFAULT);
SemaphoreHandle_t mux_lock = xSemaphoreCreateMutex();
if (usbh_obj == NULL || mux_lock == NULL) {
ret = ESP_ERR_NO_MEM;
goto err;
}
// Initialize USBH object
TAILQ_INIT(&usbh_obj->dynamic.devs_idle_tailq);
TAILQ_INIT(&usbh_obj->dynamic.devs_pending_tailq);
usbh_obj->constant.proc_req_cb = usbh_config->proc_req_cb;
usbh_obj->constant.proc_req_cb_arg = usbh_config->proc_req_cb_arg;
usbh_obj->constant.event_cb = usbh_config->event_cb;
usbh_obj->constant.event_cb_arg = usbh_config->event_cb_arg;
usbh_obj->constant.mux_lock = mux_lock;
// Assign USBH object pointer
USBH_ENTER_CRITICAL();
if (p_usbh_obj != NULL) {
USBH_EXIT_CRITICAL();
ret = ESP_ERR_INVALID_STATE;
goto err;
}
p_usbh_obj = usbh_obj;
USBH_EXIT_CRITICAL();
ret = ESP_OK;
return ret;
err:
if (mux_lock != NULL) {
vSemaphoreDelete(mux_lock);
}
heap_caps_free(usbh_obj);
return ret;
}
esp_err_t usbh_uninstall(void)
{
// Check that USBH is in a state to be uninstalled
USBH_ENTER_CRITICAL();
USBH_CHECK_FROM_CRIT(p_usbh_obj != NULL, ESP_ERR_INVALID_STATE);
usbh_t *usbh_obj = p_usbh_obj;
USBH_EXIT_CRITICAL();
esp_err_t ret;
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(usbh_obj->constant.mux_lock, portMAX_DELAY);
if (p_usbh_obj->mux_protected.num_device > 0) {
// There are still devices allocated. Can't uninstall right now.
ret = ESP_ERR_INVALID_STATE;
goto exit;
}
// Check again if we can uninstall
USBH_ENTER_CRITICAL();
assert(p_usbh_obj == usbh_obj);
p_usbh_obj = NULL;
USBH_EXIT_CRITICAL();
xSemaphoreGive(usbh_obj->constant.mux_lock);
// Free resources
vSemaphoreDelete(usbh_obj->constant.mux_lock);
heap_caps_free(usbh_obj);
ret = ESP_OK;
return ret;
exit:
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
return ret;
}
esp_err_t usbh_process(void)
{
USBH_ENTER_CRITICAL();
USBH_CHECK_FROM_CRIT(p_usbh_obj != NULL, ESP_ERR_INVALID_STATE);
// Keep processing until all device's with pending events have been handled
while (!TAILQ_EMPTY(&p_usbh_obj->dynamic.devs_pending_tailq)) {
// Move the device back into the idle device list,
device_t *dev_obj = TAILQ_FIRST(&p_usbh_obj->dynamic.devs_pending_tailq);
TAILQ_REMOVE(&p_usbh_obj->dynamic.devs_pending_tailq, dev_obj, dynamic.tailq_entry);
TAILQ_INSERT_TAIL(&p_usbh_obj->dynamic.devs_idle_tailq, dev_obj, dynamic.tailq_entry);
// Clear the device's flags
uint32_t action_flags = dev_obj->dynamic.action_flags;
dev_obj->dynamic.action_flags = 0;
dev_obj->dynamic.flags.in_pending_list = 0;
/* ---------------------------------------------------------------------
Exit critical section to handle device action flags in their listed order
--------------------------------------------------------------------- */
USBH_EXIT_CRITICAL();
ESP_LOGD(USBH_TAG, "Processing actions 0x%"PRIx32"", action_flags);
if (action_flags & DEV_ACTION_EPn_HALT_FLUSH) {
handle_epn_halt_flush(dev_obj);
}
if (action_flags & DEV_ACTION_EP0_FLUSH) {
handle_ep0_flush(dev_obj);
}
if (action_flags & DEV_ACTION_EP0_DEQUEUE) {
handle_ep0_dequeue(dev_obj);
}
if (action_flags & DEV_ACTION_EP0_CLEAR) {
handle_ep0_clear(dev_obj);
}
if (action_flags & DEV_ACTION_PROP_GONE_EVT) {
handle_prop_gone_evt(dev_obj);
}
/*
Note: We make these action flags mutually exclusive in case they happen in rapid succession. They are handled
in the order of precedence
For example
- New device event is requested followed immediately by a disconnection
*/
if (action_flags & DEV_ACTION_FREE) {
handle_free(dev_obj);
} else if (action_flags & DEV_ACTION_PROP_NEW_DEV) {
handle_prop_new_dev(dev_obj);
}
USBH_ENTER_CRITICAL();
/* ---------------------------------------------------------------------
Re-enter critical sections. All device action flags should have been handled.
--------------------------------------------------------------------- */
}
USBH_EXIT_CRITICAL();
return ESP_OK;
}
// ---------------------------------------------- Device Pool Functions ------------------------------------------------
esp_err_t usbh_devs_num(int *num_devs_ret)
{
USBH_CHECK(num_devs_ret != NULL, ESP_ERR_INVALID_ARG);
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
*num_devs_ret = p_usbh_obj->mux_protected.num_device;
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
return ESP_OK;
}
esp_err_t usbh_devs_addr_list_fill(int list_len, uint8_t *dev_addr_list, int *num_dev_ret)
{
USBH_CHECK(dev_addr_list != NULL && num_dev_ret != NULL, ESP_ERR_INVALID_ARG);
int num_filled = 0;
device_t *dev_obj;
USBH_ENTER_CRITICAL();
/*
Fill list with devices from idle tailq and pending tailq. Only devices that
are fully enumerated are added to the list. Thus, the following devices are
not excluded:
- Devices with their enum_lock set
- Devices not in the configured state
- Devices with address 0
*/
TAILQ_FOREACH(dev_obj, &p_usbh_obj->dynamic.devs_idle_tailq, dynamic.tailq_entry) {
if (num_filled < list_len) {
if (!dev_obj->dynamic.flags.enum_lock &&
dev_obj->dynamic.state == USB_DEVICE_STATE_CONFIGURED &&
dev_obj->constant.address != 0) {
dev_addr_list[num_filled] = dev_obj->constant.address;
num_filled++;
}
} else {
// Address list is already full
break;
}
}
// Fill list with devices from pending tailq
TAILQ_FOREACH(dev_obj, &p_usbh_obj->dynamic.devs_pending_tailq, dynamic.tailq_entry) {
if (num_filled < list_len) {
if (!dev_obj->dynamic.flags.enum_lock &&
dev_obj->dynamic.state == USB_DEVICE_STATE_CONFIGURED &&
dev_obj->constant.address != 0) {
dev_addr_list[num_filled] = dev_obj->constant.address;
num_filled++;
}
} else {
// Address list is already full
break;
}
}
USBH_EXIT_CRITICAL();
// Write back number of devices filled
*num_dev_ret = num_filled;
return ESP_OK;
}
esp_err_t usbh_devs_add(unsigned int uid, usb_speed_t dev_speed, hcd_port_handle_t port_hdl)
{
USBH_CHECK(port_hdl != NULL, ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj;
// Allocate a device object (initialized to address 0)
ret = device_alloc(uid, dev_speed, port_hdl, &dev_obj);
if (ret != ESP_OK) {
return ret;
}
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
USBH_ENTER_CRITICAL();
// Check that there is not already a device with the same uid
if (_find_dev_from_uid(uid) != NULL) {
ret = ESP_ERR_INVALID_ARG;
goto exit;
}
// Check that there is not already a device currently with address 0
if (_find_dev_from_addr(0) != NULL) {
ret = ESP_ERR_NOT_FINISHED;
goto exit;
}
// Add the device to the idle device list
TAILQ_INSERT_TAIL(&p_usbh_obj->dynamic.devs_idle_tailq, dev_obj, dynamic.tailq_entry);
p_usbh_obj->mux_protected.num_device++;
ret = ESP_OK;
exit:
USBH_EXIT_CRITICAL();
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
return ret;
}
esp_err_t usbh_devs_remove(unsigned int uid)
{
esp_err_t ret;
device_t *dev_obj;
bool call_proc_req_cb = false;
USBH_ENTER_CRITICAL();
dev_obj = _find_dev_from_uid(uid);
if (dev_obj == NULL) {
ret = ESP_ERR_NOT_FOUND;
goto exit;
}
// Mark the device as gone
dev_obj->dynamic.flags.is_gone = 1;
// Check if the device can be freed immediately
if (dev_obj->dynamic.open_count == 0) {
// Device is not currently opened at all. Can free immediately.
call_proc_req_cb = _dev_set_actions(dev_obj, DEV_ACTION_FREE);
} else {
// Device is still opened. Flush endpoints and propagate device gone event
call_proc_req_cb = _dev_set_actions(dev_obj,
DEV_ACTION_EPn_HALT_FLUSH |
DEV_ACTION_EP0_FLUSH |
DEV_ACTION_EP0_DEQUEUE |
DEV_ACTION_PROP_GONE_EVT);
}
ret = ESP_OK;
exit:
USBH_EXIT_CRITICAL();
// Call the processing request callback
if (call_proc_req_cb) {
p_usbh_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_USBH, false, p_usbh_obj->constant.proc_req_cb_arg);
}
return ret;
}
esp_err_t usbh_devs_mark_all_free(void)
{
USBH_ENTER_CRITICAL();
/*
Go through the device list and mark each device as waiting to be closed. If the device is not opened at all, we can
disable it immediately.
Note: We manually traverse the list because we need to add/remove items while traversing
*/
bool call_proc_req_cb = false;
bool wait_for_free = false;
for (int i = 0; i < 2; i++) {
device_t *dev_obj_cur;
device_t *dev_obj_next;
// Go through pending list first as it's more efficient
if (i == 0) {
dev_obj_cur = TAILQ_FIRST(&p_usbh_obj->dynamic.devs_pending_tailq);
} else {
dev_obj_cur = TAILQ_FIRST(&p_usbh_obj->dynamic.devs_idle_tailq);
}
while (dev_obj_cur != NULL) {
// Keep a copy of the next item first in case we remove the current item
dev_obj_next = TAILQ_NEXT(dev_obj_cur, dynamic.tailq_entry);
if (dev_obj_cur->dynamic.open_count == 0) {
// Device is not opened. Can free immediately.
call_proc_req_cb |= _dev_set_actions(dev_obj_cur, DEV_ACTION_FREE);
} else {
// Device is still opened. Just mark it as waiting to be freed
dev_obj_cur->dynamic.flags.waiting_free = 1;
}
// At least one device needs to be freed. User needs to wait for USBH_EVENT_ALL_FREE event
wait_for_free = true;
dev_obj_cur = dev_obj_next;
}
}
USBH_EXIT_CRITICAL();
if (call_proc_req_cb) {
p_usbh_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_USBH, false, p_usbh_obj->constant.proc_req_cb_arg);
}
return (wait_for_free) ? ESP_ERR_NOT_FINISHED : ESP_OK;
}
esp_err_t usbh_devs_open(uint8_t dev_addr, usb_device_handle_t *dev_hdl)
{
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
esp_err_t ret;
USBH_ENTER_CRITICAL();
// Go through the device lists to find the device with the specified address
device_t *dev_obj = _find_dev_from_addr(dev_addr);
if (dev_obj != NULL) {
// Check if the device is in a state to be opened
if (dev_obj->dynamic.flags.is_gone || // Device is already gone (disconnected)
dev_obj->dynamic.flags.waiting_free) { // Device is waiting to be freed
ret = ESP_ERR_INVALID_STATE;
} else if (dev_obj->dynamic.flags.enum_lock) { // Device's enum_lock is set
ret = ESP_ERR_NOT_ALLOWED;
} else {
dev_obj->dynamic.open_count++;
*dev_hdl = (usb_device_handle_t)dev_obj;
ret = ESP_OK;
}
} else {
ret = ESP_ERR_NOT_FOUND;
}
USBH_EXIT_CRITICAL();
return ret;
}
esp_err_t usbh_devs_close(usb_device_handle_t dev_hdl)
{
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
USBH_ENTER_CRITICAL();
// Device should never be closed while its enum_lock is
USBH_CHECK_FROM_CRIT(!dev_obj->dynamic.flags.enum_lock, ESP_ERR_NOT_ALLOWED);
dev_obj->dynamic.open_count--;
bool call_proc_req_cb = false;
if (dev_obj->dynamic.open_count == 0) {
// Sanity check.
assert(dev_obj->dynamic.num_ctrl_xfers_inflight == 0); // There cannot be any control transfer in-flight
assert(!dev_obj->dynamic.flags.waiting_free); // This can only be set when open_count reaches 0
if (dev_obj->dynamic.flags.is_gone || dev_obj->dynamic.flags.waiting_free) {
// Device is already gone or is awaiting to be freed. Trigger the USBH process to free the device
call_proc_req_cb = _dev_set_actions(dev_obj, DEV_ACTION_FREE);
}
// Else, there's nothing to do. Leave the device allocated
}
USBH_EXIT_CRITICAL();
if (call_proc_req_cb) {
p_usbh_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_USBH, false, p_usbh_obj->constant.proc_req_cb_arg);
}
return ESP_OK;
}
esp_err_t usbh_devs_new_dev_event(usb_device_handle_t dev_hdl)
{
device_t *dev_obj = (device_t *)dev_hdl;
bool call_proc_req_cb = false;
USBH_ENTER_CRITICAL();
// Device must be in the configured state
USBH_CHECK_FROM_CRIT(dev_obj->dynamic.state == USB_DEVICE_STATE_CONFIGURED, ESP_ERR_INVALID_STATE);
call_proc_req_cb = _dev_set_actions(dev_obj, DEV_ACTION_PROP_NEW_DEV);
USBH_EXIT_CRITICAL();
// Call the processing request callback
if (call_proc_req_cb) {
p_usbh_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_USBH, false, p_usbh_obj->constant.proc_req_cb_arg);
}
return ESP_OK;
}
// ------------------------------------------------ Device Functions ---------------------------------------------------
// ----------------------- Getters -------------------------
esp_err_t usbh_dev_get_addr(usb_device_handle_t dev_hdl, uint8_t *dev_addr)
{
USBH_CHECK(dev_hdl != NULL && dev_addr != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
USBH_ENTER_CRITICAL();
USBH_CHECK_FROM_CRIT(dev_obj->constant.address > 0, ESP_ERR_INVALID_STATE);
*dev_addr = dev_obj->constant.address;
USBH_EXIT_CRITICAL();
return ESP_OK;
}
esp_err_t usbh_dev_get_info(usb_device_handle_t dev_hdl, usb_device_info_t *dev_info)
{
USBH_CHECK(dev_hdl != NULL && dev_info != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
dev_info->speed = dev_obj->constant.speed;
dev_info->dev_addr = dev_obj->constant.address;
// Device descriptor might not have been set yet
if (dev_obj->constant.desc) {
dev_info->bMaxPacketSize0 = dev_obj->constant.desc->bMaxPacketSize0;
} else {
// Use the default pipe's MPS instead
dev_info->bMaxPacketSize0 = hcd_pipe_get_mps(dev_obj->constant.default_pipe);
}
// Configuration descriptor might not have been set yet
if (dev_obj->constant.config_desc) {
dev_info->bConfigurationValue = dev_obj->constant.config_desc->bConfigurationValue;
} else {
dev_info->bConfigurationValue = 0;
}
dev_info->str_desc_manufacturer = dev_obj->constant.str_desc_manu;
dev_info->str_desc_product = dev_obj->constant.str_desc_product;
dev_info->str_desc_serial_num = dev_obj->constant.str_desc_ser_num;
return ESP_OK;
}
esp_err_t usbh_dev_get_desc(usb_device_handle_t dev_hdl, const usb_device_desc_t **dev_desc_ret)
{
USBH_CHECK(dev_hdl != NULL && dev_desc_ret != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
*dev_desc_ret = dev_obj->constant.desc;
return ESP_OK;
}
esp_err_t usbh_dev_get_config_desc(usb_device_handle_t dev_hdl, const usb_config_desc_t **config_desc_ret)
{
USBH_CHECK(dev_hdl != NULL && config_desc_ret != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
*config_desc_ret = dev_obj->constant.config_desc;
return ESP_OK;
}
// ----------------------- Setters -------------------------
esp_err_t usbh_dev_enum_lock(usb_device_handle_t dev_hdl)
{
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj = (device_t *)dev_hdl;
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
/*
The device's enum_lock can only be set when the following conditions are met:
- No other endpoints except EP0 have been allocated
- We are the sole opener
- Device's enum_lock is not already set
*/
// Check that no other endpoints except EP0 have been allocated
bool ep_found = false;
for (int i = 0; i < NUM_NON_DEFAULT_EP; i++) {
if (dev_obj->mux_protected.endpoints[i] != NULL) {
ep_found = true;
break;
}
}
if (ep_found) {
ret = ESP_ERR_INVALID_STATE;
goto exit;
}
// Check that we are the sole opener and enum_lock is not already set
USBH_ENTER_CRITICAL();
if (!dev_obj->dynamic.flags.enum_lock && (dev_obj->dynamic.open_count == 1)) {
dev_obj->dynamic.flags.enum_lock = true;
ret = ESP_OK;
} else {
ret = ESP_ERR_INVALID_STATE;
}
USBH_EXIT_CRITICAL();
exit:
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
return ret;
}
esp_err_t usbh_dev_enum_unlock(usb_device_handle_t dev_hdl)
{
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj = (device_t *)dev_hdl;
USBH_ENTER_CRITICAL();
// Device's enum_lock must have been previously set
if (dev_obj->dynamic.flags.enum_lock) {
assert(dev_obj->dynamic.open_count == 1); // We must still be the sole opener
dev_obj->dynamic.flags.enum_lock = false;
ret = ESP_OK;
} else {
ret = ESP_ERR_INVALID_STATE;
}
USBH_EXIT_CRITICAL();
return ret;
}
esp_err_t usbh_dev_set_ep0_mps(usb_device_handle_t dev_hdl, uint16_t wMaxPacketSize)
{
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj = (device_t *)dev_hdl;
USBH_ENTER_CRITICAL();
// Device's EP0 MPS can only be updated when in the default state
if (dev_obj->dynamic.state != USB_DEVICE_STATE_DEFAULT) {
ret = ESP_ERR_INVALID_STATE;
goto exit;
}
// Device's enum_lock must be set before enumeration related data fields can be set
if (dev_obj->dynamic.flags.enum_lock) {
ret = hcd_pipe_update_mps(dev_obj->constant.default_pipe, wMaxPacketSize);
} else {
ret = ESP_ERR_NOT_ALLOWED;
}
exit:
USBH_EXIT_CRITICAL();
return ret;
}
esp_err_t usbh_dev_set_addr(usb_device_handle_t dev_hdl, uint8_t dev_addr)
{
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj = (device_t *)dev_hdl;
USBH_ENTER_CRITICAL();
// Device's address can only be set when in the default state
USBH_CHECK_FROM_CRIT(dev_obj->dynamic.state == USB_DEVICE_STATE_DEFAULT, ESP_ERR_INVALID_STATE);
// Device's enum_lock must be set before enumeration related data fields can be set
USBH_CHECK_FROM_CRIT(dev_obj->dynamic.flags.enum_lock, ESP_ERR_NOT_ALLOWED);
// Update the device and default pipe's target address
ret = hcd_pipe_update_dev_addr(dev_obj->constant.default_pipe, dev_addr);
if (ret == ESP_OK) {
dev_obj->constant.address = dev_addr;
dev_obj->dynamic.state = USB_DEVICE_STATE_ADDRESS;
}
USBH_EXIT_CRITICAL();
return ret;
}
esp_err_t usbh_dev_set_desc(usb_device_handle_t dev_hdl, const usb_device_desc_t *device_desc)
{
USBH_CHECK(dev_hdl != NULL && device_desc != NULL, ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj = (device_t *)dev_hdl;
usb_device_desc_t *new_desc, *old_desc;
// Allocate and copy new device descriptor
new_desc = heap_caps_malloc(sizeof(usb_device_desc_t), MALLOC_CAP_DEFAULT);
if (new_desc == NULL) {
return ESP_ERR_NO_MEM;
}
memcpy(new_desc, device_desc, sizeof(usb_device_desc_t));
USBH_ENTER_CRITICAL();
// Device's descriptor can only be set in the default or addressed state
if (!(dev_obj->dynamic.state == USB_DEVICE_STATE_DEFAULT || dev_obj->dynamic.state == USB_DEVICE_STATE_ADDRESS)) {
ret = ESP_ERR_INVALID_STATE;
goto err;
}
// Device's enum_lock must be set before we can set its device descriptor
if (!dev_obj->dynamic.flags.enum_lock) {
ret = ESP_ERR_NOT_ALLOWED;
goto err;
}
old_desc = dev_obj->constant.desc; // Save old descriptor for cleanup
dev_obj->constant.desc = new_desc; // Assign new descriptor
USBH_EXIT_CRITICAL();
// Clean up old descriptor or failed assignment
heap_caps_free(old_desc);
ret = ESP_OK;
return ret;
err:
USBH_EXIT_CRITICAL();
heap_caps_free(new_desc);
return ret;
}
esp_err_t usbh_dev_set_config_desc(usb_device_handle_t dev_hdl, const usb_config_desc_t *config_desc_full)
{
USBH_CHECK(dev_hdl != NULL && config_desc_full != NULL, ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj = (device_t *)dev_hdl;
usb_config_desc_t *new_desc, *old_desc;
// Allocate and copy new config descriptor
new_desc = heap_caps_malloc(config_desc_full->wTotalLength, MALLOC_CAP_DEFAULT);
if (new_desc == NULL) {
return ESP_ERR_NO_MEM;
}
memcpy(new_desc, config_desc_full, config_desc_full->wTotalLength);
USBH_ENTER_CRITICAL();
// Device's config descriptor can only be set when in the addressed state
if (dev_obj->dynamic.state != USB_DEVICE_STATE_ADDRESS) {
ret = ESP_ERR_INVALID_STATE;
goto err;
}
// Device's enum_lock must be set before we can set its config descriptor
if (!dev_obj->dynamic.flags.enum_lock) {
ret = ESP_ERR_NOT_ALLOWED;
goto err;
}
old_desc = dev_obj->constant.config_desc; // Save old descriptor for cleanup
dev_obj->constant.config_desc = new_desc; // Assign new descriptor
dev_obj->dynamic.state = USB_DEVICE_STATE_CONFIGURED;
USBH_EXIT_CRITICAL();
// Clean up old descriptor or failed assignment
heap_caps_free(old_desc);
ret = ESP_OK;
return ret;
err:
USBH_EXIT_CRITICAL();
heap_caps_free(new_desc);
return ret;
}
esp_err_t usbh_dev_set_str_desc(usb_device_handle_t dev_hdl, const usb_str_desc_t *str_desc, int select)
{
USBH_CHECK(dev_hdl != NULL && str_desc != NULL && (select >= 0 && select < 3), ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj = (device_t *)dev_hdl;
usb_str_desc_t *new_desc, *old_desc;
// Allocate and copy new string descriptor
new_desc = heap_caps_malloc(str_desc->bLength, MALLOC_CAP_DEFAULT);
if (new_desc == NULL) {
return ESP_ERR_NO_MEM;
}
memcpy(new_desc, str_desc, str_desc->bLength);
USBH_ENTER_CRITICAL();
// Device's string descriptors can only be set when in the default state
if (dev_obj->dynamic.state != USB_DEVICE_STATE_CONFIGURED) {
ret = ESP_ERR_INVALID_STATE;
goto err;
}
// Device's enum_lock must be set before we can set its string descriptors
if (!dev_obj->dynamic.flags.enum_lock) {
ret = ESP_ERR_NOT_ALLOWED;
goto err;
}
// Assign to the selected descriptor
switch (select) {
case 0:
old_desc = dev_obj->constant.str_desc_manu;
dev_obj->constant.str_desc_manu = new_desc;
break;
case 1:
old_desc = dev_obj->constant.str_desc_product;
dev_obj->constant.str_desc_product = new_desc;
break;
default: // 2
old_desc = dev_obj->constant.str_desc_ser_num;
dev_obj->constant.str_desc_ser_num = new_desc;
break;
}
USBH_EXIT_CRITICAL();
// Clean up old descriptor or failed assignment
heap_caps_free(old_desc);
ret = ESP_OK;
return ret;
err:
USBH_EXIT_CRITICAL();
heap_caps_free(new_desc);
return ret;
}
// ----------------------------------------------- Endpoint Functions -------------------------------------------------
esp_err_t usbh_ep_alloc(usb_device_handle_t dev_hdl, usbh_ep_config_t *ep_config, usbh_ep_handle_t *ep_hdl_ret)
{
USBH_CHECK(dev_hdl != NULL && ep_config != NULL && ep_hdl_ret != NULL, ESP_ERR_INVALID_ARG);
uint8_t bEndpointAddress = ep_config->bEndpointAddress;
USBH_CHECK(check_ep_addr(bEndpointAddress), ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj = (device_t *)dev_hdl;
endpoint_t *ep_obj;
USBH_CHECK(dev_obj->constant.config_desc, ESP_ERR_INVALID_STATE); // Configuration descriptor must be set
// Find the endpoint descriptor from the device's current configuration descriptor
const usb_ep_desc_t *ep_desc = usb_parse_endpoint_descriptor_by_address(dev_obj->constant.config_desc, ep_config->bInterfaceNumber, ep_config->bAlternateSetting, ep_config->bEndpointAddress, NULL);
if (ep_desc == NULL) {
return ESP_ERR_NOT_FOUND;
}
// Allocate the endpoint object
ret = endpoint_alloc(dev_obj, ep_desc, ep_config, &ep_obj);
if (ret != ESP_OK) {
goto alloc_err;
}
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
USBH_ENTER_CRITICAL();
// Check the device's state before we assign the a pipe to the allocated endpoint
if (dev_obj->dynamic.state != USB_DEVICE_STATE_CONFIGURED) {
USBH_EXIT_CRITICAL();
ret = ESP_ERR_INVALID_STATE;
goto dev_state_err;
}
USBH_EXIT_CRITICAL();
// Check if the endpoint has already been allocated
if (get_ep_from_addr(dev_obj, bEndpointAddress) == NULL) {
set_ep_from_addr(dev_obj, bEndpointAddress, ep_obj);
// Write back the endpoint handle
*ep_hdl_ret = (usbh_ep_handle_t)ep_obj;
ret = ESP_OK;
} else {
// Endpoint is already allocated
ret = ESP_ERR_INVALID_STATE;
}
dev_state_err:
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
// If the endpoint was not assigned, free it
if (ret != ESP_OK) {
endpoint_free(ep_obj);
}
alloc_err:
return ret;
}
esp_err_t usbh_ep_free(usbh_ep_handle_t ep_hdl)
{
USBH_CHECK(ep_hdl != NULL, ESP_ERR_INVALID_ARG);
esp_err_t ret;
endpoint_t *ep_obj = (endpoint_t *)ep_hdl;
device_t *dev_obj = (device_t *)ep_obj->constant.dev;
uint8_t bEndpointAddress = ep_obj->constant.ep_desc->bEndpointAddress;
// Todo: Check that the EP's underlying pipe is halted before allowing the EP to be freed (IDF-7273)
// Check that the the EP's underlying pipe has no more in-flight URBs
if (hcd_pipe_get_num_urbs(ep_obj->constant.pipe_hdl) != 0) {
ret = ESP_ERR_INVALID_STATE;
goto exit;
}
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
// Check if the endpoint was allocated on this device
if (ep_obj == get_ep_from_addr(dev_obj, bEndpointAddress)) {
// Clear the endpoint from the device's endpoint object list
set_ep_from_addr(dev_obj, bEndpointAddress, NULL);
ret = ESP_OK;
} else {
ret = ESP_ERR_NOT_FOUND;
}
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
// Finally, we free the endpoint object
if (ret == ESP_OK) {
endpoint_free(ep_obj);
}
exit:
return ret;
}
esp_err_t usbh_ep_get_handle(usb_device_handle_t dev_hdl, uint8_t bEndpointAddress, usbh_ep_handle_t *ep_hdl_ret)
{
USBH_CHECK(dev_hdl != NULL && ep_hdl_ret != NULL, ESP_ERR_INVALID_ARG);
USBH_CHECK(check_ep_addr(bEndpointAddress), ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj = (device_t *)dev_hdl;
endpoint_t *ep_obj;
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
ep_obj = get_ep_from_addr(dev_obj, bEndpointAddress);
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
if (ep_obj) {
*ep_hdl_ret = (usbh_ep_handle_t)ep_obj;
ret = ESP_OK;
} else {
ret = ESP_ERR_NOT_FOUND;
}
return ret;
}
esp_err_t usbh_ep_command(usbh_ep_handle_t ep_hdl, usbh_ep_cmd_t command)
{
USBH_CHECK(ep_hdl != NULL, ESP_ERR_INVALID_ARG);
endpoint_t *ep_obj = (endpoint_t *)ep_hdl;
// Send the command to the EP's underlying pipe
return hcd_pipe_command(ep_obj->constant.pipe_hdl, (hcd_pipe_cmd_t)command);
}
void *usbh_ep_get_context(usbh_ep_handle_t ep_hdl)
{
assert(ep_hdl);
endpoint_t *ep_obj = (endpoint_t *)ep_hdl;
return hcd_pipe_get_context(ep_obj->constant.pipe_hdl);
}
// ----------------------------------------------- Transfer Functions --------------------------------------------------
esp_err_t usbh_dev_submit_ctrl_urb(usb_device_handle_t dev_hdl, urb_t *urb)
{
USBH_CHECK(dev_hdl != NULL && urb != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
USBH_CHECK(urb_check_args(urb), ESP_ERR_INVALID_ARG);
bool xfer_is_in = ((usb_setup_packet_t *)urb->transfer.data_buffer)->bmRequestType & USB_BM_REQUEST_TYPE_DIR_IN;
// Device descriptor could still be NULL at this point, so we get the MPS from the pipe instead.
unsigned int mps = hcd_pipe_get_mps(dev_obj->constant.default_pipe);
USBH_CHECK(transfer_check_usb_compliance(&(urb->transfer), USB_TRANSFER_TYPE_CTRL, mps, xfer_is_in), ESP_ERR_INVALID_ARG);
USBH_ENTER_CRITICAL();
// Increment the control transfer count first
dev_obj->dynamic.num_ctrl_xfers_inflight++;
USBH_EXIT_CRITICAL();
esp_err_t ret;
if (hcd_pipe_get_state(dev_obj->constant.default_pipe) != HCD_PIPE_STATE_ACTIVE) {
ret = ESP_ERR_INVALID_STATE;
goto hcd_err;
}
ret = hcd_urb_enqueue(dev_obj->constant.default_pipe, urb);
if (ret != ESP_OK) {
goto hcd_err;
}
ret = ESP_OK;
return ret;
hcd_err:
USBH_ENTER_CRITICAL();
dev_obj->dynamic.num_ctrl_xfers_inflight--;
USBH_EXIT_CRITICAL();
return ret;
}
esp_err_t usbh_ep_enqueue_urb(usbh_ep_handle_t ep_hdl, urb_t *urb)
{
USBH_CHECK(ep_hdl != NULL && urb != NULL, ESP_ERR_INVALID_ARG);
USBH_CHECK(urb_check_args(urb), ESP_ERR_INVALID_ARG);
endpoint_t *ep_obj = (endpoint_t *)ep_hdl;
USBH_CHECK(transfer_check_usb_compliance(&(urb->transfer),
USB_EP_DESC_GET_XFERTYPE(ep_obj->constant.ep_desc),
USB_EP_DESC_GET_MPS(ep_obj->constant.ep_desc),
USB_EP_DESC_GET_EP_DIR(ep_obj->constant.ep_desc)),
ESP_ERR_INVALID_ARG);
// Check that the EP's underlying pipe is in the active state before submitting the URB
if (hcd_pipe_get_state(ep_obj->constant.pipe_hdl) != HCD_PIPE_STATE_ACTIVE) {
return ESP_ERR_INVALID_STATE;
}
// Enqueue the URB to the EP's underlying pipe
return hcd_urb_enqueue(ep_obj->constant.pipe_hdl, urb);
}
esp_err_t usbh_ep_dequeue_urb(usbh_ep_handle_t ep_hdl, urb_t **urb_ret)
{
USBH_CHECK(ep_hdl != NULL && urb_ret != NULL, ESP_ERR_INVALID_ARG);
endpoint_t *ep_obj = (endpoint_t *)ep_hdl;
// Enqueue the URB to the EP's underlying pipe
*urb_ret = hcd_urb_dequeue(ep_obj->constant.pipe_hdl);
return ESP_OK;
}
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