michaelh/zephyr
1
0
Fork 0
Code Releases Activity

bluetooth: cyw43xxx: support autobaud feature

Browse source 
Newer AIROC controllers like the CYW55573 don't support changing the
baudrate in Download Mode. However, a higher baud rate can be used
directly to sent HCI Reset.

This commit adds the KConfig flag CONFIG_AIROC_DOWNLOAD_MODE to enable
the new behaviour.

Signed-off-by: Matthias Ringwald <matthias@ringwald.ch>
This commit is contained in:
Matthias Ringwald 2024-04-01 13:20:55 +02:00 • committed by Dan Kalowsky
commit e50f03404e
2 changed files with 31 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

16
drivers/bluetooth/hci/Kconfig.infineon
View file

@ -196,6 +196,22 @@ config AIROC_CUSTOM_FIRMWARE_HCD_BLOB
Path to BT firmware HCD file for custom or vendor CYW43xx modules.
It can be absolute path, or relative from project folder.
config AIROC_AUTOBAUD_MODE
bool "Autobaud mode"
help
Use Autobaud feature of AIROC Controller for fast firmware download
Newer AIROC Controllers such as CYW555xx only allow firmware
upload in Download Mode after a Recovery Reset.
In Download Mode the Baud Rate vendor command cannot be used
initially. Instead, Autobaud mode allows to direct use a higher
baud rate.
Autobaud mode is not required on older AIROC controllers.
https://infineon.github.io/btsdk-docs/BT-SDK/AIROC-HCI-Firmware-Download.pdf
# Change size of command lengths. It for vendor commands related to
# firmware downloading.
config BT_BUF_CMD_TX_SIZE

17
drivers/bluetooth/hci/h4_ifx_cyw43xxx.c
View file

@ -251,14 +251,27 @@ int bt_h4_vnd_setup(const struct device *dev)
/* BT settling time after power on */
(void)k_msleep(BT_POWER_ON_SETTLING_TIME_MS);
/* Newer controllers like CYW555xx require Download mode for firmware upload.
* In Download mode, the baudrate cannot be changed without the Minidriver.
* We use auto-baud mode to use a higher baud rate directly.
*/
if (IS_ENABLED(CONFIG_AIROC_AUTOBAUD_MODE) &&
(fw_download_speed != default_uart_speed)) {
err = bt_hci_uart_set_baudrate(dev, fw_download_speed);
if (err) {
return err;
}
}
/* Send HCI_RESET */
err = bt_hci_cmd_send_sync(BT_HCI_OP_RESET, NULL, NULL);
if (err) {
return err;
}
/* Re-configure baudrate for BT Controller */
if (fw_download_speed != default_uart_speed) {
/* Re-configure baudrate for BT Controller (if we haven't already) */
if (!IS_ENABLED(CONFIG_AIROC_AUTOBAUD_MODE) &&
(fw_download_speed != default_uart_speed)) {
err = bt_update_controller_baudrate(dev, fw_download_speed);
if (err) {
return err;