fw_config.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <bootstate.h>
#include <console/console.h>
#include <fw_config.h>
#include <gpio.h>
 
static const struct pad_config bt_i2s_enable_pads[] = {
        PAD_CFG_NF(GPP_VGPIO_30, NONE, DEEP, NF3),      /* BT_I2S_BCLK */
        PAD_CFG_NF(GPP_VGPIO_31, NONE, DEEP, NF3),      /* BT_I2S_SYNC */
        PAD_CFG_NF(GPP_VGPIO_32, NONE, DEEP, NF3),      /* BT_I2S_SDO */
        PAD_CFG_NF(GPP_VGPIO_33, NONE, DEEP, NF3),      /* BT_I2S_SDI */
        PAD_CFG_NF(GPP_VGPIO_34, NONE, DEEP, NF1),      /* SSP2_SCLK */
        PAD_CFG_NF(GPP_VGPIO_35, NONE, DEEP, NF1),      /* SSP2_SFRM */
        PAD_CFG_NF(GPP_VGPIO_36, NONE, DEEP, NF1),      /* SSP_TXD */
        PAD_CFG_NF(GPP_VGPIO_37, NONE, DEEP, NF1),      /* SSP_RXD */
};
 
static const struct pad_config bt_i2s_disable_pads[] = {
        PAD_NC(GPP_VGPIO_30, NONE),
        PAD_NC(GPP_VGPIO_31, NONE),
        PAD_NC(GPP_VGPIO_32, NONE),
        PAD_NC(GPP_VGPIO_33, NONE),
        PAD_NC(GPP_VGPIO_34, NONE),
        PAD_NC(GPP_VGPIO_35, NONE),
        PAD_NC(GPP_VGPIO_36, NONE),
        PAD_NC(GPP_VGPIO_37, NONE),
};
 
static void fw_config_handle(void *unused)
{
        if (!fw_config_is_provisioned() || fw_config_probe(FW_CONFIG(AUDIO, AUDIO_UNKNOWN))) {
                printk(BIOS_INFO, "Disable BT offload audio related GPIO pins.\n");
                gpio_configure_pads(bt_i2s_disable_pads, ARRAY_SIZE(bt_i2s_disable_pads));
                return;
        }
 
        if (fw_config_probe(FW_CONFIG(AUDIO, NAU88L25B_I2S))) {
                printk(BIOS_INFO, "BT offload enabled over I2S with NAU88L25B\n");
                gpio_configure_pads(bt_i2s_enable_pads, ARRAY_SIZE(bt_i2s_enable_pads));
        }
 
}
BOOT_STATE_INIT_ENTRY(BS_DEV_ENABLE, BS_ON_ENTRY, fw_config_handle, NULL);