complete(&ar->target_suspend);
 }
 
+static void ath10k_init_sdio(struct ath10k *ar)
+{
+       u32 param = 0;
+
+       ath10k_bmi_write32(ar, hi_mbox_io_block_sz, 256);
+       ath10k_bmi_write32(ar, hi_mbox_isr_yield_limit, 99);
+       ath10k_bmi_read32(ar, hi_acs_flags, ¶m);
+
+       param |= (HI_ACS_FLAGS_SDIO_SWAP_MAILBOX_SET |
+                 HI_ACS_FLAGS_SDIO_REDUCE_TX_COMPL_SET |
+                 HI_ACS_FLAGS_ALT_DATA_CREDIT_SIZE);
+
+       ath10k_bmi_write32(ar, hi_acs_flags, param);
+}
+
 static int ath10k_init_configure_target(struct ath10k *ar)
 {
        u32 param_host;
        if (status)
                goto err;
 
+       if (ar->hif.bus == ATH10K_BUS_SDIO)
+               ath10k_init_sdio(ar);
+
        ar->htc.htc_ops.target_send_suspend_complete =
                ath10k_send_suspend_complete;