static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
struct mmc_card *oldcard)
{
struct mmc_card *card;
int err;
u32 cid[4];
unsigned int max_dtr;
#ifdef CONFIG_MMC_PARANOID_SD_INIT
int retries;
#endif
BUG_ON(!host);
WARN_ON(!host->claimed);
mmc_go_idle(host);
err = mmc_send_if_cond(host, ocr);
if (!err)
ocr |= 1 << 30;
err = mmc_send_app_op_cond(host, ocr, NULL);
if (err)
goto err;
if (mmc_host_is_spi(host))
err = mmc_send_cid(host, cid);
else
err = mmc_all_send_cid(host, cid);
if (err)
goto err;
if (oldcard) {
if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
err = -ENOENT;
goto err;
}
card = oldcard;
} else {
card = mmc_alloc_card(host, &sd_type);
if (IS_ERR(card)) {
err = PTR_ERR(card);
goto err;
}
card->type = MMC_TYPE_SD;
memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
}
if (!mmc_host_is_spi(host)) {
err = mmc_send_relative_addr(host, &card->rca);
if (err)
goto free_card;
mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
}
if (!oldcard) {
err = mmc_send_csd(card, card->raw_csd);
if (err)
goto free_card;
err = mmc_decode_csd(card);
if (err)
goto free_card;
mmc_decode_cid(card);
}
if (!mmc_host_is_spi(host)) {
err = mmc_select_card(card);
if (err)
goto free_card;
}
if (!oldcard) {
err = mmc_app_send_scr(card, card->raw_scr);
if (err)
goto free_card;
err = mmc_decode_scr(card);
if (err < 0)
goto free_card;
#ifdef CONFIG_MMC_PARANOID_SD_INIT
for (retries = 1; retries <= 3; retries++) {
err = mmc_read_switch(card);
if (!err) {
if (retries > 1) {
printk(KERN_WARNING
"%s: recovered\n",
mmc_hostname(host));
}
break;
} else {
printk(KERN_WARNING
"%s: read switch failed (attempt %d)\n",
mmc_hostname(host), retries);
}
}
#else
err = mmc_read_switch(card);
#endif
if (err)
goto free_card;
}
if (mmc_host_is_spi(host)) {
err = mmc_spi_set_crc(host, use_spi_crc);
if (err)
goto free_card;
}
err = mmc_switch_hs(card);
if (err)
goto free_card;
max_dtr = (unsigned int)-1;
if (mmc_card_highspeed(card)) {
if (max_dtr > card->sw_caps.hs_max_dtr)
max_dtr = card->sw_caps.hs_max_dtr;
} else if (max_dtr > card->csd.max_dtr) {
max_dtr = card->csd.max_dtr;
}
mmc_set_clock(host, max_dtr);
if ((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)
goto free_card;
mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
}
if (!oldcard) {
if (!host->ops->get_ro || host->ops->get_ro(host) < 0) {
printk(KERN_WARNING "%s: host does not "
"support reading read-only "
"switch. assuming write-enable.\n",
mmc_hostname(host));
} else {
if (host->ops->get_ro(host) > 0)
mmc_card_set_readonly(card);
}
}
if (!oldcard)
host->card = card;
return 0;
free_card:
if (!oldcard)
mmc_remove_card(card);
err:
return err;
}
int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
bool reinit)
{
int err;
#ifdef CONFIG_MMC_PARANOID_SD_INIT
int retries;
#endif
if (!reinit) {
/*
* Fetch SCR from card.
*/
err = mmc_app_send_scr(card, card->raw_scr);
if (err)
return err;
err = mmc_decode_scr(card);
if (err)
return err;
/*
* Fetch and process SD Status register.
*/
err = mmc_read_ssr(card);
if (err)
return err;
/* Erase init depends on CSD and SSR */
mmc_init_erase(card);
/*
* Fetch switch information from card.
*/
#ifdef CONFIG_MMC_PARANOID_SD_INIT
for (retries = 1; retries <= 3; retries++) {
err = mmc_read_switch(card);
if (!err) {
if (retries > 1) {
printk(KERN_WARNING
"%s: recovered\n",
mmc_hostname(host));
}
break;
} else {
printk(KERN_WARNING
"%s: read switch failed (attempt %d)\n",
mmc_hostname(host), retries);
}
}
#else
err = mmc_read_switch(card);
#endif
if (err)
return err;
}
/*
* For SPI, enable CRC as appropriate.
* This CRC enable is located AFTER the reading of the
* card registers because some SDHC cards are not able
* to provide valid CRCs for non-512-byte blocks.
*/
if (mmc_host_is_spi(host)) {
err = mmc_spi_set_crc(host, use_spi_crc);
if (err)
return err;
}
/*
* Check if read-only switch is active.
*/
if (!reinit) {
int ro = -1;
if (host->ops->get_ro)
ro = host->ops->get_ro(host);
if (ro < 0) {
printk(KERN_WARNING "%s: host does not "
"support reading read-only "
"switch. assuming write-enable.\n",
mmc_hostname(host));
} else if (ro > 0) {
mmc_card_set_readonly(card);
}
}
return 0;
}
/*
* Handle the detection and initialisation of a card.
*
* In the case of a resume, "oldcard" will contain the card
* we're trying to reinitialise.
*/
static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
struct mmc_card *oldcard)
{
struct mmc_card *card;
int err;
u32 cid[4];
unsigned int max_dtr;
#ifdef CONFIG_MMC_PARANOID_SD_INIT
int retries;
#endif
BUG_ON(!host);
WARN_ON(!host->claimed);
/*
* Since we're changing the OCR value, we seem to
* need to tell some cards to go back to the idle
* state. We wait 1ms to give cards time to
* respond.
*/
mmc_go_idle(host);
/*
* If SD_SEND_IF_COND indicates an SD 2.0
* compliant card and we should set bit 30
* of the ocr to indicate that we can handle
* block-addressed SDHC cards.
*/
err = mmc_send_if_cond(host, ocr);
if (!err)
ocr |= 1 << 30;
err = mmc_send_app_op_cond(host, ocr, NULL);
if (err)
goto err;
/*
* Fetch CID from card.
*/
if (mmc_host_is_spi(host))
err = mmc_send_cid(host, cid);
else
err = mmc_all_send_cid(host, cid);
if (err)
goto err;
if (oldcard) {
if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
err = -ENOENT;
goto err;
}
card = oldcard;
} else {
/*
* Allocate card structure.
*/
card = mmc_alloc_card(host, &sd_type);
if (IS_ERR(card)) {
err = PTR_ERR(card);
goto err;
}
card->type = MMC_TYPE_SD;
memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
}
/*
* For native busses: get card RCA and quit open drain mode.
*/
if (!mmc_host_is_spi(host)) {
err = mmc_send_relative_addr(host, &card->rca);
if (err)
goto free_card;
mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
}
if (!oldcard) {
/*
* Fetch CSD from card.
*/
err = mmc_send_csd(card, card->raw_csd);
if (err)
goto free_card;
err = mmc_decode_csd(card);
if (err)
goto free_card;
mmc_decode_cid(card);
}
/*
* Select card, as all following commands rely on that.
*/
if (!mmc_host_is_spi(host)) {
err = mmc_select_card(card);
if (err)
goto free_card;
}
if (!oldcard) {
/*
* Fetch SCR from card.
*/
err = mmc_app_send_scr(card, card->raw_scr);
if (err)
goto free_card;
err = mmc_decode_scr(card);
if (err < 0)
goto free_card;
/*
* Fetch switch information from card.
*/
#ifdef CONFIG_MMC_PARANOID_SD_INIT
for (retries = 1; retries <= 3; retries++) {
err = mmc_read_switch(card);
if (!err) {
if (retries > 1) {
printk(KERN_WARNING
"%s: recovered\n",
mmc_hostname(host));
}
break;
} else {
printk(KERN_WARNING
"%s: read switch failed (attempt %d)\n",
mmc_hostname(host), retries);
}
}
#else
err = mmc_read_switch(card);
#endif
if (err)
goto free_card;
}
/*
* For SPI, enable CRC as appropriate.
* This CRC enable is located AFTER the reading of the
* card registers because some SDHC cards are not able
* to provide valid CRCs for non-512-byte blocks.
*/
if (mmc_host_is_spi(host)) {
err = mmc_spi_set_crc(host, use_spi_crc);
if (err)
goto free_card;
}
/*
* Attempt to change to high-speed (if supported)
*/
err = mmc_switch_hs(card);
if (err)
goto free_card;
/*
* Compute bus speed.
*/
max_dtr = (unsigned int)-1;
if (mmc_card_highspeed(card)) {
if (max_dtr > card->sw_caps.hs_max_dtr)
max_dtr = card->sw_caps.hs_max_dtr;
} else if (max_dtr > card->csd.max_dtr) {
max_dtr = card->csd.max_dtr;
}
mmc_set_clock(host, max_dtr);
/*
* Switch to wider bus (if supported).
*/
if ((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)
goto free_card;
mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
}
/*
* Check if read-only switch is active.
*/
if (!oldcard) {
if (!host->ops->get_ro || host->ops->get_ro(host) < 0) {
printk(KERN_WARNING "%s: host does not "
"support reading read-only "
"switch. assuming write-enable.\n",
mmc_hostname(host));
} else {
if (host->ops->get_ro(host) > 0)
mmc_card_set_readonly(card);
}
}
if (!oldcard)
host->card = card;
return 0;
free_card:
if (!oldcard)
mmc_remove_card(card);
err:
return err;
}
static void
mmc_discover_cards(struct mmc_softc *sc)
{
struct mmc_ivars *ivar = NULL;
device_t *devlist;
int err, i, devcount, newcard;
uint32_t raw_cid[4];
uint32_t resp, sec_count;
device_t child;
uint16_t rca = 2;
u_char switch_res[64];
if (bootverbose || mmc_debug)
device_printf(sc->dev, "Probing cards\n");
while (1) {
err = mmc_all_send_cid(sc, raw_cid);
if (err == MMC_ERR_TIMEOUT)
break;
if (err != MMC_ERR_NONE) {
device_printf(sc->dev, "Error reading CID %d\n", err);
break;
}
newcard = 1;
if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0)
return;
for (i = 0; i < devcount; i++) {
ivar = device_get_ivars(devlist[i]);
if (memcmp(ivar->raw_cid, raw_cid, sizeof(raw_cid)) == 0) {
newcard = 0;
break;
}
}
free(devlist, M_TEMP);
if (bootverbose || mmc_debug) {
device_printf(sc->dev, "%sard detected (CID %08x%08x%08x%08x)\n",
newcard ? "New c" : "C",
raw_cid[0], raw_cid[1], raw_cid[2], raw_cid[3]);
}
if (newcard) {
ivar = malloc(sizeof(struct mmc_ivars), M_DEVBUF,
M_WAITOK | M_ZERO);
if (!ivar)
return;
memcpy(ivar->raw_cid, raw_cid, sizeof(raw_cid));
}
if (mmcbr_get_ro(sc->dev))
ivar->read_only = 1;
ivar->bus_width = bus_width_1;
ivar->timing = bus_timing_normal;
ivar->mode = mmcbr_get_mode(sc->dev);
if (ivar->mode == mode_sd) {
mmc_decode_cid_sd(ivar->raw_cid, &ivar->cid);
mmc_send_relative_addr(sc, &resp);
ivar->rca = resp >> 16;
/* Get card CSD. */
mmc_send_csd(sc, ivar->rca, ivar->raw_csd);
mmc_decode_csd_sd(ivar->raw_csd, &ivar->csd);
ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE;
if (ivar->csd.csd_structure > 0)
ivar->high_cap = 1;
ivar->tran_speed = ivar->csd.tran_speed;
ivar->erase_sector = ivar->csd.erase_sector *
ivar->csd.write_bl_len / MMC_SECTOR_SIZE;
/* Get card SCR. Card must be selected to fetch it. */
mmc_select_card(sc, ivar->rca);
mmc_app_send_scr(sc, ivar->rca, ivar->raw_scr);
mmc_app_decode_scr(ivar->raw_scr, &ivar->scr);
/* Get card switch capabilities (command class 10). */
if ((ivar->scr.sda_vsn >= 1) &&
(ivar->csd.ccc & (1<<10))) {
mmc_sd_switch(sc, SD_SWITCH_MODE_CHECK,
SD_SWITCH_GROUP1, SD_SWITCH_NOCHANGE,
switch_res);
if (switch_res[13] & 2) {
ivar->timing = bus_timing_hs;
ivar->hs_tran_speed = SD_MAX_HS;
}
}
mmc_app_sd_status(sc, ivar->rca, ivar->raw_sd_status);
mmc_app_decode_sd_status(ivar->raw_sd_status,
&ivar->sd_status);
if (ivar->sd_status.au_size != 0) {
ivar->erase_sector =
16 << ivar->sd_status.au_size;
}
mmc_select_card(sc, 0);
/* Find max supported bus width. */
if ((mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) &&
(ivar->scr.bus_widths & SD_SCR_BUS_WIDTH_4))
ivar->bus_width = bus_width_4;
if (bootverbose || mmc_debug)
mmc_log_card(sc->dev, ivar, newcard);
if (newcard) {
/* Add device. */
child = device_add_child(sc->dev, NULL, -1);
device_set_ivars(child, ivar);
}
return;
}
mmc_decode_cid_mmc(ivar->raw_cid, &ivar->cid);
ivar->rca = rca++;
mmc_set_relative_addr(sc, ivar->rca);
/* Get card CSD. */
mmc_send_csd(sc, ivar->rca, ivar->raw_csd);
mmc_decode_csd_mmc(ivar->raw_csd, &ivar->csd);
ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE;
ivar->tran_speed = ivar->csd.tran_speed;
ivar->erase_sector = ivar->csd.erase_sector *
ivar->csd.write_bl_len / MMC_SECTOR_SIZE;
/* Only MMC >= 4.x cards support EXT_CSD. */
if (ivar->csd.spec_vers >= 4) {
/* Card must be selected to fetch EXT_CSD. */
mmc_select_card(sc, ivar->rca);
mmc_send_ext_csd(sc, ivar->raw_ext_csd);
/* Handle extended capacity from EXT_CSD */
sec_count = ivar->raw_ext_csd[EXT_CSD_SEC_CNT] +
(ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 1] << 8) +
(ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 2] << 16) +
(ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 3] << 24);
if (sec_count != 0) {
ivar->sec_count = sec_count;
ivar->high_cap = 1;
}
/* Get card speed in high speed mode. */
ivar->timing = bus_timing_hs;
if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE]
& EXT_CSD_CARD_TYPE_52)
ivar->hs_tran_speed = MMC_TYPE_52_MAX_HS;
else if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE]
& EXT_CSD_CARD_TYPE_26)
ivar->hs_tran_speed = MMC_TYPE_26_MAX_HS;
else
ivar->hs_tran_speed = ivar->tran_speed;
/* Find max supported bus width. */
ivar->bus_width = mmc_test_bus_width(sc);
mmc_select_card(sc, 0);
/* Handle HC erase sector size. */
if (ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE] != 0) {
ivar->erase_sector = 1024 *
ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE];
mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_ERASE_GRP_DEF, 1);
}
} else {
ivar->bus_width = bus_width_1;
ivar->timing = bus_timing_normal;
}
if (bootverbose || mmc_debug)
mmc_log_card(sc->dev, ivar, newcard);
if (newcard) {
/* Add device. */
child = device_add_child(sc->dev, NULL, -1);
device_set_ivars(child, ivar);
}
}
