#include "core.h"
#include "bus.h"
+#include "sd.h"
#include "sdio_bus.h"
#include "mmc_ops.h"
#include "sd_ops.h"
func->num = fn;
- ret = sdio_read_fbr(func);
- if (ret)
- goto fail;
+ if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) {
+ ret = sdio_read_fbr(func);
+ if (ret)
+ goto fail;
- ret = sdio_read_func_cis(func);
- if (ret)
- goto fail;
+ ret = sdio_read_func_cis(func);
+ if (ret)
+ goto fail;
+ } else {
+ func->vendor = func->card->cis.vendor;
+ func->device = func->card->cis.device;
+ func->max_blksize = func->card->cis.blksize;
+ }
card->sdio_func[fn - 1] = func;
if (ret)
return ret;
- mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
-
- return 0;
+ return 1;
}
/*
return 0;
}
+
+static int sdio_enable_4bit_bus(struct mmc_card *card)
+{
+ int err;
+
+ if (card->type == MMC_TYPE_SDIO)
+ return sdio_enable_wide(card);
+
+ if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
+ (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
+ err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
+ if (err)
+ return err;
+ } else
+ return 0;
+
+ err = sdio_enable_wide(card);
+ if (err <= 0)
+ mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1);
+
+ return err;
+}
+
+
/*
* Test if the card supports high-speed mode and, if so, switch to it.
*/
-static int sdio_enable_hs(struct mmc_card *card)
+static int mmc_sdio_switch_hs(struct mmc_card *card, int enable)
{
int ret;
u8 speed;
if (ret)
return ret;
- speed |= SDIO_SPEED_EHS;
+ if (enable)
+ speed |= SDIO_SPEED_EHS;
+ else
+ speed &= ~SDIO_SPEED_EHS;
ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
if (ret)
return ret;
- mmc_card_set_highspeed(card);
- mmc_set_timing(card->host, MMC_TIMING_SD_HS);
+ return 1;
+}
- return 0;
+/*
+ * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported.
+ */
+static int sdio_enable_hs(struct mmc_card *card)
+{
+ int ret;
+
+ ret = mmc_sdio_switch_hs(card, true);
+ if (ret <= 0 || card->type == MMC_TYPE_SDIO)
+ return ret;
+
+ ret = mmc_sd_switch_hs(card);
+ if (ret <= 0)
+ mmc_sdio_switch_hs(card, false);
+
+ return ret;
+}
+
+static unsigned mmc_sdio_get_max_clock(struct mmc_card *card)
+{
+ unsigned max_dtr;
+
+ if (mmc_card_highspeed(card)) {
+ /*
+ * The SDIO specification doesn't mention how
+ * the CIS transfer speed register relates to
+ * high-speed, but it seems that 50 MHz is
+ * mandatory.
+ */
+ max_dtr = 50000000;
+ } else {
+ max_dtr = card->cis.max_dtr;
+ }
+
+ if (card->type == MMC_TYPE_SD_COMBO)
+ max_dtr = min(max_dtr, mmc_sd_get_max_clock(card));
+
+ return max_dtr;
}
/*
goto err;
}
- card->type = MMC_TYPE_SDIO;
+ err = mmc_sd_get_cid(host, host->ocr & ocr, card->raw_cid);
+
+ if (!err) {
+ card->type = MMC_TYPE_SD_COMBO;
+
+ if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO ||
+ memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) {
+ mmc_remove_card(card);
+ return -ENOENT;
+ }
+ } else {
+ card->type = MMC_TYPE_SDIO;
+
+ if (oldcard && oldcard->type != MMC_TYPE_SDIO) {
+ mmc_remove_card(card);
+ return -ENOENT;
+ }
+ }
/*
* Call the optional HC's init_card function to handle quirks.
mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
}
+ /*
+ * Read CSD, before selecting the card
+ */
+ if (!oldcard && card->type == MMC_TYPE_SD_COMBO) {
+ err = mmc_sd_get_csd(host, card);
+ if (err)
+ return err;
+
+ mmc_decode_cid(card);
+ }
+
/*
* Select card, as all following commands rely on that.
*/
goto remove;
}
+ if (card->quirks & MMC_QUIRK_NONSTD_SDIO) {
+ /*
+ * This is non-standard SDIO device, meaning it doesn't
+ * have any CIA (Common I/O area) registers present.
+ * It's host's responsibility to fill cccr and cis
+ * structures in init_card().
+ */
+ mmc_set_clock(host, card->cis.max_dtr);
+
+ if (card->cccr.high_speed) {
+ mmc_card_set_highspeed(card);
+ mmc_set_timing(card->host, MMC_TIMING_SD_HS);
+ }
+
+ goto finish;
+ }
+
/*
* Read the common registers.
*/
int same = (card->cis.vendor == oldcard->cis.vendor &&
card->cis.device == oldcard->cis.device);
mmc_remove_card(card);
- if (!same) {
- err = -ENOENT;
- goto err;
- }
+ if (!same)
+ return -ENOENT;
+
card = oldcard;
return 0;
}
+ if (card->type == MMC_TYPE_SD_COMBO) {
+ err = mmc_sd_setup_card(host, card, oldcard != NULL);
+ /* handle as SDIO-only card if memory init failed */
+ if (err) {
+ mmc_go_idle(host);
+ if (mmc_host_is_spi(host))
+ /* should not fail, as it worked previously */
+ mmc_spi_set_crc(host, use_spi_crc);
+ card->type = MMC_TYPE_SDIO;
+ } else
+ card->dev.type = &sd_type;
+ }
+
+ /*
+ * If needed, disconnect card detection pull-up resistor.
+ */
+ err = sdio_disable_cd(card);
+ if (err)
+ goto remove;
+
/*
* Switch to high-speed (if supported).
*/
err = sdio_enable_hs(card);
- if (err)
+ if (err > 0)
+ mmc_sd_go_highspeed(card);
+ else if (err)
goto remove;
/*
* Change to the card's maximum speed.
*/
- if (mmc_card_highspeed(card)) {
- /*
- * The SDIO specification doesn't mention how
- * the CIS transfer speed register relates to
- * high-speed, but it seems that 50 MHz is
- * mandatory.
- */
- mmc_set_clock(host, 50000000);
- } else {
- mmc_set_clock(host, card->cis.max_dtr);
- }
+ mmc_set_clock(host, mmc_sdio_get_max_clock(card));
/*
* Switch to wider bus (if supported).
*/
- err = sdio_enable_wide(card);
- if (err)
+ err = sdio_enable_4bit_bus(card);
+ if (err > 0)
+ mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
+ else if (err)
goto remove;
+finish:
if (!oldcard)
host->card = card;
return 0;
mmc_claim_host(host);
err = mmc_sdio_init_card(host, host->ocr, host->card,
(host->pm_flags & MMC_PM_KEEP_POWER));
- if (!err)
+ if (!err) {
/* We may have switched to 1-bit mode during suspend. */
- err = sdio_enable_wide(host->card);
+ err = sdio_enable_4bit_bus(host->card);
+ if (err > 0) {
+ mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
+ err = 0;
+ }
+ }
if (!err && host->sdio_irqs)
mmc_signal_sdio_irq(host);
mmc_release_host(host);
funcs = (ocr & 0x70000000) >> 28;
card->sdio_funcs = 0;
- /*
- * If needed, disconnect card detection pull-up resistor.
- */
- err = sdio_disable_cd(card);
- if (err)
- goto remove;
-
/*
* Initialize (but don't add) all present functions.
*/
git.samba.org / sfrench / cifs-2.6.git / blobdiff