+#include "sdio_cis.h"
+
+static int sdio_read_fbr(struct sdio_func *func)
+{
+ int ret;
+ unsigned char data;
+
+ ret = mmc_io_rw_direct(func->card, 0, 0,
+ SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
+ if (ret)
+ goto out;
+
+ data &= 0x0f;
+
+ if (data == 0x0f) {
+ ret = mmc_io_rw_direct(func->card, 0, 0,
+ SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data);
+ if (ret)
+ goto out;
+ }
+
+ func->class = data;
+
+out:
+ return ret;
+}
+
+static int sdio_init_func(struct mmc_card *card, unsigned int fn)
+{
+ int ret;
+ struct sdio_func *func;
+
+ BUG_ON(fn > SDIO_MAX_FUNCS);
+
+ func = sdio_alloc_func(card);
+ if (IS_ERR(func))
+ return PTR_ERR(func);
+
+ func->num = fn;
+
+ ret = sdio_read_fbr(func);
+ if (ret)
+ goto fail;
+
+ ret = sdio_read_func_cis(func);
+ if (ret)
+ goto fail;
+
+ card->sdio_func[fn - 1] = func;
+
+ return 0;
+
+fail:
+ /*
+ * It is okay to remove the function here even though we hold
+ * the host lock as we haven't registered the device yet.
+ */
+ sdio_remove_func(func);
+ return ret;
+}
+
+static int sdio_read_cccr(struct mmc_card *card)
+{
+ int ret;
+ int cccr_vsn;
+ unsigned char data;
+
+ memset(&card->cccr, 0, sizeof(struct sdio_cccr));
+
+ ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data);
+ if (ret)
+ goto out;
+
+ cccr_vsn = data & 0x0f;
+
+ if (cccr_vsn > SDIO_CCCR_REV_1_20) {
+ printk(KERN_ERR "%s: unrecognised CCCR structure version %d\n",
+ mmc_hostname(card->host), cccr_vsn);
+ return -EINVAL;
+ }
+
+ card->cccr.sdio_vsn = (data & 0xf0) >> 4;
+
+ ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data);
+ if (ret)
+ goto out;
+
+ if (data & SDIO_CCCR_CAP_SMB)
+ card->cccr.multi_block = 1;
+ if (data & SDIO_CCCR_CAP_LSC)
+ card->cccr.low_speed = 1;
+ if (data & SDIO_CCCR_CAP_4BLS)
+ card->cccr.wide_bus = 1;
+
+ if (cccr_vsn >= SDIO_CCCR_REV_1_10) {
+ ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data);
+ if (ret)
+ goto out;
+
+ if (data & SDIO_POWER_SMPC)
+ card->cccr.high_power = 1;
+ }
+
+ if (cccr_vsn >= SDIO_CCCR_REV_1_20) {
+ ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &data);
+ if (ret)
+ goto out;
+
+ if (data & SDIO_SPEED_SHS)
+ card->cccr.high_speed = 1;
+ }
+
+out:
+ return ret;
+}
+
+static int sdio_enable_wide(struct mmc_card *card)
+{
+ int ret;
+ u8 ctrl;
+
+ if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
+ return 0;
+
+ if (card->cccr.low_speed && !card->cccr.wide_bus)
+ return 0;
+
+ ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
+ if (ret)
+ return ret;
+
+ ctrl |= SDIO_BUS_WIDTH_4BIT;
+
+ ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
+ if (ret)
+ return ret;
+
+ mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
+
+ return 0;
+}