/*
- * linux/drivers/mmc/sd.c
+ * linux/drivers/mmc/core/sd.c
*
* Copyright (C) 2003-2004 Russell King, All Rights Reserved.
* SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
csd->write_partial = 0;
break;
default:
- printk("%s: unrecognised CSD structure version %d\n",
+ printk(KERN_ERR "%s: unrecognised CSD structure version %d\n",
mmc_hostname(card->host), csd_struct);
return -EINVAL;
}
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];
scr_struct = UNSTUFF_BITS(resp, 60, 4);
if (scr_struct != 0) {
- printk("%s: unrecognised SCR structure version %d\n",
+ printk(KERN_ERR "%s: unrecognised SCR structure version %d\n",
mmc_hostname(card->host), scr_struct);
return -EINVAL;
}
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("%s: could not allocate a buffer for switch "
- "capabilities.\n",
- mmc_hostname(card->host));
- return err;
+ printk(KERN_ERR "%s: could not allocate a buffer for "
+ "switch capabilities.\n", mmc_hostname(card->host));
+ 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;
}
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("%s: could not allocate a buffer for switch "
- "capabilities.\n",
- mmc_hostname(card->host));
- return err;
+ printk(KERN_ERR "%s: could not allocate a buffer for "
+ "switch capabilities.\n", mmc_hostname(card->host));
+ 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) {
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
* 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 {
* 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);
/*
* 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);
* Fetch switch information from card.
*/
err = mmc_read_switch(card);
- if (err != MMC_ERR_NONE)
+ if (err)
goto free_card;
}
* Attempt to change to high-speed (if supported)
*/
err = mmc_switch_hs(card);
- if (err != MMC_ERR_NONE)
+ if (err)
goto free_card;
/*
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);
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;
}
/*
mmc_release_host(host);
- if (err != MMC_ERR_NONE) {
+ if (err) {
mmc_sd_remove(host);
mmc_claim_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);
}
BUG_ON(!host->card);
mmc_claim_host(host);
-
err = mmc_sd_init_card(host, host->ocr, host->card);
- if (err != MMC_ERR_NONE) {
+ mmc_release_host(host);
+
+ if (err) {
mmc_sd_remove(host);
+
+ mmc_claim_host(host);
mmc_detach_bus(host);
+ mmc_release_host(host);
}
- mmc_release_host(host);
}
#else
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.
/*
* Can we support the voltage(s) of the card(s)?
*/
- if (!host->ocr)
+ if (!host->ocr) {
+ err = -EINVAL;
goto err;
+ }
/*
* 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);
err = mmc_add_card(host->card);
if (err)
- goto reclaim_host;
+ goto remove_card;
return 0;
-reclaim_host:
- mmc_claim_host(host);
+remove_card:
mmc_remove_card(host->card);
host->card = NULL;
+ mmc_claim_host(host);
err:
mmc_detach_bus(host);
mmc_release_host(host);
- return 0;
+ printk(KERN_ERR "%s: error %d whilst initialising SD card\n",
+ mmc_hostname(host), err);
+
+ return err;
}