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refactor(usb/phy): Merge P4 and S2/S3 PHYs into one module

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P4 had separate PHY implementation for initial bring-up,
now we can merge it with the original PHY driver.
This commit is contained in:
Tomas Rezucha
2025-01-08 13:00:02 +01:00
parent 19bdc77e55
commit 6d97cd0aa1
14 changed files with 208 additions and 126 deletions
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31
examples/peripherals/usb/README.md
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@@ -1,23 +1,28 @@
# USB-OTG Examples
See the [README.md](../README.md) file in the upper level [examples](../) directory for more information about examples.
See the [README.md](../../README.md) file in the upper level [examples](../../) directory for more information about examples.
## Common Pin Assignments
Pin assignment is only needed for ESP chips that have an USB-OTG peripheral.
Pin assignment is only needed for ESP chips that have a USB-OTG peripheral.
If your board doesn't have a USB connector connected to the USB-OTG dedicated GPIOs, you may have to DIY a cable and connect **D+** and **D-** to the pins listed below.
```
ESP BOARD USB CONNECTOR (type A)
--
| || VCC
[USBPHY_DM_NUM] ------> | || D-
[USBPHY_DP_NUM] ------> | || D+
| || GND
--
ESP BOARD USB CONNECTOR (type A)
--
| || VBUS (5V)
[USB_DM] ------> | || D-
[USB_DP] ------> | || D+
| || GND
--
```
Refer to `soc/usb_pins.h` to find the real GPIO number of **USBPHY_DP_NUM** and **USBPHY_DM_NUM**.
| | USB_DP | USB_DM |
| ----------- | ------ | ------ |
| ESP32-S2/S3 | GPIO20 | GPIO19 |
### USB PHY pin mapping
| | USB_DP | USB_DM |
| ------------ | ------ | ------ |
| ESP32-S2/S3 | GPIO20 | GPIO19 |
| ESP32-P4 2.0 | pin 51 | pin 50 |
| ESP32-P4 1.1 | GPIO27 | GPIO26 |
> Note: On the ESP32-P4, the USB 2.0 PHY pins are dedicated to USB-OTG functionality and cannot be used as general-purpose GPIOs.