#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/sdio_func.h>
#include "core.h"
#include "bus.h"
+#include "sdio_bus.h"
#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,
+ func->num * 0x100 + SDIO_FBR_STD_IF, 0, &data);
+ if (ret)
+ goto out;
+
+ data &= 0x0f;
+
+ if (data == 0x0f) {
+ ret = mmc_io_rw_direct(func->card, 0, 0,
+ func->num * 0x100 + 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;
+}
/*
* Host is being removed. Free up the current card.
*/
static void mmc_sdio_remove(struct mmc_host *host)
{
+ int i;
+
BUG_ON(!host);
BUG_ON(!host->card);
+ for (i = 0;i < host->card->sdio_funcs;i++) {
+ if (host->card->sdio_func[i]) {
+ sdio_remove_func(host->card->sdio_func[i]);
+ host->card->sdio_func[i] = NULL;
+ }
+ }
+
mmc_remove_card(host->card);
host->card = NULL;
}
int mmc_attach_sdio(struct mmc_host *host, u32 ocr)
{
int err;
- int funcs;
+ int i, funcs;
struct mmc_card *card;
BUG_ON(!host);
}
card->type = MMC_TYPE_SDIO;
+ card->sdio_funcs = funcs;
+
+ host->card = card;
/*
* Set card RCA.
*/
err = mmc_send_relative_addr(host, &card->rca);
if (err)
- goto free_card;
+ goto remove;
mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
*/
err = mmc_select_card(card);
if (err)
- goto free_card;
+ goto remove;
- host->card = card;
+ /*
+ * Read the common registers.
+ */
+ err = sdio_read_cccr(card);
+ 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.
+ */
+ for (i = 0;i < funcs;i++) {
+ err = sdio_init_func(host->card, i + 1);
+ if (err)
+ goto remove;
+ }
mmc_release_host(host);
+ /*
+ * First add the card to the driver model...
+ */
err = mmc_add_card(host->card);
if (err)
- goto reclaim_host;
+ goto remove_added;
+
+ /*
+ * ...then the SDIO functions.
+ */
+ for (i = 0;i < funcs;i++) {
+ err = sdio_add_func(host->card->sdio_func[i]);
+ if (err)
+ goto remove_added;
+ }
return 0;
-reclaim_host:
+
+remove_added:
+ /* Remove without lock if the device has been added. */
+ mmc_sdio_remove(host);
mmc_claim_host(host);
-free_card:
- mmc_remove_card(card);
- host->card = NULL;
+remove:
+ /* And with lock if it hasn't been added. */
+ if (host->card)
+ mmc_sdio_remove(host);
err:
mmc_detach_bus(host);
mmc_release_host(host);