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path: root/drivers/mmc/core/sd.c
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Diffstat (limited to 'drivers/mmc/core/sd.c')
-rw-r--r--drivers/mmc/core/sd.c126
1 files changed, 82 insertions, 44 deletions
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 1edc62b1e5c6..d1c1e0f592f1 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -166,8 +166,6 @@ static int mmc_decode_scr(struct mmc_card *card)
unsigned int scr_struct;
u32 resp[4];
- BUG_ON(!mmc_card_sd(card));
-
resp[3] = card->raw_scr[1];
resp[2] = card->raw_scr[0];
@@ -193,30 +191,38 @@ static int mmc_read_switch(struct mmc_card *card)
u8 *status;
if (card->scr.sda_vsn < SCR_SPEC_VER_1)
- return MMC_ERR_NONE;
+ return 0;
if (!(card->csd.cmdclass & CCC_SWITCH)) {
printk(KERN_WARNING "%s: card lacks mandatory switch "
"function, performance might suffer.\n",
mmc_hostname(card->host));
- return MMC_ERR_NONE;
+ return 0;
}
- err = MMC_ERR_FAILED;
+ err = -EIO;
status = kmalloc(64, GFP_KERNEL);
if (!status) {
printk(KERN_ERR "%s: could not allocate a buffer for "
"switch capabilities.\n", mmc_hostname(card->host));
- return err;
+ return -ENOMEM;
}
err = mmc_sd_switch(card, 0, 0, 1, status);
- if (err != MMC_ERR_NONE) {
+ if (err) {
+ /*
+ * We all hosts that cannot perform the command
+ * to fail more gracefully
+ */
+ if (err != -EINVAL)
+ goto out;
+
printk(KERN_WARNING "%s: problem reading switch "
"capabilities, performance might suffer.\n",
mmc_hostname(card->host));
- err = MMC_ERR_NONE;
+ err = 0;
+
goto out;
}
@@ -238,28 +244,28 @@ static int mmc_switch_hs(struct mmc_card *card)
u8 *status;
if (card->scr.sda_vsn < SCR_SPEC_VER_1)
- return MMC_ERR_NONE;
+ return 0;
if (!(card->csd.cmdclass & CCC_SWITCH))
- return MMC_ERR_NONE;
+ return 0;
if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
- return MMC_ERR_NONE;
+ return 0;
if (card->sw_caps.hs_max_dtr == 0)
- return MMC_ERR_NONE;
+ return 0;
- err = MMC_ERR_FAILED;
+ err = -EIO;
status = kmalloc(64, GFP_KERNEL);
if (!status) {
printk(KERN_ERR "%s: could not allocate a buffer for "
"switch capabilities.\n", mmc_hostname(card->host));
- return err;
+ return -ENOMEM;
}
err = mmc_sd_switch(card, 1, 0, 1, status);
- if (err != MMC_ERR_NONE)
+ if (err)
goto out;
if ((status[16] & 0xF) != 1) {
@@ -292,7 +298,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
unsigned int max_dtr;
BUG_ON(!host);
- BUG_ON(!host->claimed);
+ WARN_ON(!host->claimed);
/*
* Since we're changing the OCR value, we seem to
@@ -309,23 +315,37 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
* block-addressed SDHC cards.
*/
err = mmc_send_if_cond(host, ocr);
- if (err == MMC_ERR_NONE)
+ if (!err)
ocr |= 1 << 30;
err = mmc_send_app_op_cond(host, ocr, NULL);
- if (err != MMC_ERR_NONE)
+ 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;
+ }
+
+ /*
* Fetch CID from card.
*/
- err = mmc_all_send_cid(host, cid);
- if (err != MMC_ERR_NONE)
+ 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)
+ if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
+ err = -ENOENT;
goto err;
+ }
card = oldcard;
} else {
@@ -333,32 +353,36 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
* Allocate card structure.
*/
card = mmc_alloc_card(host);
- if (IS_ERR(card))
+ if (IS_ERR(card)) {
+ err = PTR_ERR(card);
goto err;
+ }
card->type = MMC_TYPE_SD;
memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
}
/*
- * Set card RCA.
+ * For native busses: get card RCA and quit open drain mode.
*/
- err = mmc_send_relative_addr(host, &card->rca);
- if (err != MMC_ERR_NONE)
- goto free_card;
+ 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);
+ mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ }
if (!oldcard) {
/*
* Fetch CSD from card.
*/
err = mmc_send_csd(card, card->raw_csd);
- if (err != MMC_ERR_NONE)
+ if (err)
goto free_card;
err = mmc_decode_csd(card);
- if (err < 0)
+ if (err)
goto free_card;
mmc_decode_cid(card);
@@ -367,16 +391,18 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
/*
* Select card, as all following commands rely on that.
*/
- err = mmc_select_card(card);
- if (err != MMC_ERR_NONE)
- goto free_card;
+ 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 != MMC_ERR_NONE)
+ if (err)
goto free_card;
err = mmc_decode_scr(card);
@@ -387,7 +413,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
* Fetch switch information from card.
*/
err = mmc_read_switch(card);
- if (err != MMC_ERR_NONE)
+ if (err)
goto free_card;
}
@@ -395,7 +421,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
* Attempt to change to high-speed (if supported)
*/
err = mmc_switch_hs(card);
- if (err != MMC_ERR_NONE)
+ if (err)
goto free_card;
/*
@@ -418,7 +444,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
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 != MMC_ERR_NONE)
+ if (err)
goto free_card;
mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
@@ -442,14 +468,14 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
if (!oldcard)
host->card = card;
- return MMC_ERR_NONE;
+ return 0;
free_card:
if (!oldcard)
mmc_remove_card(card);
err:
- return MMC_ERR_FAILED;
+ return err;
}
/*
@@ -483,7 +509,7 @@ static void mmc_sd_detect(struct mmc_host *host)
mmc_release_host(host);
- if (err != MMC_ERR_NONE) {
+ if (err) {
mmc_sd_remove(host);
mmc_claim_host(host);
@@ -552,7 +578,8 @@ static void mmc_sd_suspend(struct mmc_host *host)
BUG_ON(!host->card);
mmc_claim_host(host);
- mmc_deselect_cards(host);
+ if (!mmc_host_is_spi(host))
+ mmc_deselect_cards(host);
host->card->state &= ~MMC_STATE_HIGHSPEED;
mmc_release_host(host);
}
@@ -574,7 +601,7 @@ static void mmc_sd_resume(struct mmc_host *host)
err = mmc_sd_init_card(host, host->ocr, host->card);
mmc_release_host(host);
- if (err != MMC_ERR_NONE) {
+ if (err) {
mmc_sd_remove(host);
mmc_claim_host(host);
@@ -608,11 +635,22 @@ int mmc_attach_sd(struct mmc_host *host, u32 ocr)
int err;
BUG_ON(!host);
- BUG_ON(!host->claimed);
+ WARN_ON(!host->claimed);
mmc_attach_bus(host, &mmc_sd_ops);
/*
+ * We need to get OCR a different way for SPI.
+ */
+ if (mmc_host_is_spi(host)) {
+ mmc_go_idle(host);
+
+ err = mmc_spi_read_ocr(host, 0, &ocr);
+ if (err)
+ goto err;
+ }
+
+ /*
* Sanity check the voltages that the card claims to
* support.
*/
@@ -644,7 +682,7 @@ int mmc_attach_sd(struct mmc_host *host, u32 ocr)
* Detect and init the card.
*/
err = mmc_sd_init_card(host, host->ocr, NULL);
- if (err != MMC_ERR_NONE)
+ if (err)
goto err;
mmc_release_host(host);
@@ -666,6 +704,6 @@ err:
printk(KERN_ERR "%s: error %d whilst initialising SD card\n",
mmc_hostname(host), err);
- return 0;
+ return err;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.