#include "mmc_ops.h"
#include "sd_ops.h"
#include "sdio_ops.h"
+#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->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)
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;
+}
+
/*
* Host is being removed. Free up the current card.
*/
struct mmc_card *card;
BUG_ON(!host);
- BUG_ON(!host->claimed);
+ WARN_ON(!host->claimed);
mmc_attach_bus(host, &mmc_sdio_ops);
if (err)
goto err;
+ /*
+ * For SPI, enable CRC as appropriate.
+ */
+ if (mmc_host_is_spi(host)) {
+ err = mmc_spi_set_crc(host, use_spi_crc);
+ if (err)
+ goto err;
+ }
+
/*
* The number of functions on the card is encoded inside
* the ocr.
/*
* Allocate card structure.
*/
- card = mmc_alloc_card(host);
+ card = mmc_alloc_card(host, NULL);
if (IS_ERR(card)) {
err = PTR_ERR(card);
goto err;
host->card = card;
/*
- * Set card RCA.
+ * For native busses: set card RCA and quit open drain mode.
*/
- err = mmc_send_relative_addr(host, &card->rca);
- if (err)
- goto remove;
+ if (!mmc_host_is_spi(host)) {
+ err = mmc_send_relative_addr(host, &card->rca);
+ if (err)
+ goto remove;
- mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ }
/*
* Select card, as all following commands rely on that.
*/
- err = mmc_select_card(card);
- if (err)
- goto remove;
+ if (!mmc_host_is_spi(host)) {
+ err = mmc_select_card(card);
+ if (err)
+ goto remove;
+ }
/*
* Read the common registers.
if (err)
goto remove;
+ /*
+ * Read the common CIS tuples.
+ */
+ err = sdio_read_common_cis(card);
+ if (err)
+ goto remove;
+
+ /*
+ * No support for high-speed yet, so just set
+ * the card's maximum speed.
+ */
+ mmc_set_clock(host, card->cis.max_dtr);
+
+ /*
+ * Switch to wider bus (if supported).
+ */
+ err = sdio_enable_wide(card);
+ if (err)
+ goto remove;
+
/*
* Initialize (but don't add) all present functions.
*/