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feat(usb/host): Add option to choose peripheral for USB host library

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Starting with ESP32-P4 we can have targets that have more than 1 USB-OTG peripheral.
This commit adds an option to choose which peripherals will be used by USB Host lib.

Internally, we will still have only 1 Root HUB but with multiple Root ports.
This commit is contained in:
Tomas Rezucha
2025-07-01 10:11:55 +02:00
parent 3867241e01
commit 8fb0366f70
9 changed files with 122 additions and 64 deletions
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components/usb/usb_host.c
+19 -5
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@@ -17,9 +17,11 @@ Warning: The USB Host Library API is still a beta version and may be subject to
#include "freertos/queue.h"
#include "freertos/semphr.h"
#include "esp_private/critical_section.h"
#include "soc/usb_dwc_periph.h"
#include "esp_err.h"
#include "esp_log.h"
#include "esp_heap_caps.h"
#include "esp_bit_defs.h"
#include "hub.h"
#include "enum.h"
#include "usbh.h"
@@ -466,16 +468,26 @@ esp_err_t usb_host_install(const usb_host_config_t *config)
- Hub
*/
// For backward compatibility accept 0 too
const unsigned peripheral_map = config->peripheral_map == 0 ? BIT0 : config->peripheral_map;
// Install USB PHY (if necessary). USB PHY driver will also enable the underlying Host Controller
if (!config->skip_phy_setup) {
bool init_utmi_phy = false; // Default value for Linux simulation
#if SOC_USB_OTG_SUPPORTED // In case we run on a real target, select the PHY from usb_dwc_info description structure
// Right now we support only one peripheral, can be extended in future
int peripheral_index = 0;
if (peripheral_map & BIT1) {
peripheral_index = 1;
}
init_utmi_phy = (usb_dwc_info.controllers[peripheral_index].supported_phys == USB_PHY_INST_UTMI_0);
#endif // SOC_USB_OTG_SUPPORTED
// Host Library defaults to internal PHY
usb_phy_config_t phy_config = {
.controller = USB_PHY_CTRL_OTG,
#if CONFIG_IDF_TARGET_ESP32P4 // ESP32-P4 has 2 USB-DWC peripherals, each with its dedicated PHY. We support HS+UTMI only ATM.
.target = USB_PHY_TARGET_UTMI,
#else
.target = USB_PHY_TARGET_INT,
#endif
.target = init_utmi_phy ? USB_PHY_TARGET_UTMI : USB_PHY_TARGET_INT,
.otg_mode = USB_OTG_MODE_HOST,
.otg_speed = USB_PHY_SPEED_UNDEFINED, // In Host mode, the speed is determined by the connected device
.ext_io_conf = NULL,
@@ -493,6 +505,7 @@ esp_err_t usb_host_install(const usb_host_config_t *config)
hcd_fifo_settings_t user_fifo_config;
hcd_config_t hcd_config = {
.intr_flags = config->intr_flags,
.peripheral_map = peripheral_map,
.fifo_config = NULL, // Default: use bias strategy from Kconfig
};
@@ -547,6 +560,7 @@ esp_err_t usb_host_install(const usb_host_config_t *config)
// Install Hub
hub_config_t hub_config = {
.port_map = peripheral_map, // Each USB-OTG peripheral maps to a root port
.proc_req_cb = proc_req_callback,
.proc_req_cb_arg = NULL,
.event_cb = hub_event_callback,