+static u8 if_sdio_read_rx_unit(struct if_sdio_card *card)
+{
+ int ret;
+ u8 rx_unit;
+
+ rx_unit = sdio_readb(card->func, IF_SDIO_RX_UNIT, &ret);
+
+ if (ret)
+ rx_unit = 0;
+
+ return rx_unit;
+}
+
+static u16 if_sdio_read_rx_len(struct if_sdio_card *card, int *err)
+{
+ int ret;
+ u16 rx_len;
+
+ switch (card->model) {
+ case IF_SDIO_MODEL_8385:
+ case IF_SDIO_MODEL_8686:
+ rx_len = if_sdio_read_scratch(card, &ret);
+ break;
+ case IF_SDIO_MODEL_8688:
+ default: /* for newer chipsets */
+ rx_len = sdio_readb(card->func, IF_SDIO_RX_LEN, &ret);
+ if (!ret)
+ rx_len <<= card->rx_unit;
+ else
+ rx_len = 0xffff; /* invalid length */
+
+ break;
+ }
+
+ if (err)
+ *err = ret;
+
+ return rx_len;
+}
+