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mmc: sd: Add Extension memory addressing

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SDUC memory addressing spans beyond 2TB and up to 128TB.  Therefore, 38
bits are required to access the entire memory space of all sectors.
Those extra 6 bits are to be carried by CMD22 prior of sending
read/write/erase commands: CMD17, CMD18, CMD24, CMD25, CMD32, and CMD33.

CMD22 will carry the higher order 6 bits, and must precedes any of the
above commands even if it targets sector < 2TB.

No error related to address or length is indicated in CMD22 but rather
in the read/write command itself.

Tested-by: Ricky WU <ricky_wu@realtek.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20241006051148.160278-3-avri.altman@wdc.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Avri Altman 2024-10-06 08:11:40 +03:00 committed by Ulf Hansson
parent fce2ce78af
commit 375b535941
3 changed files with 19 additions and 0 deletions
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15
drivers/mmc/core/sd_ops.c
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@ -16,6 +16,7 @@
#include <linux/mmc/sd.h>
#include "core.h"
#include "card.h"
#include "sd_ops.h"
#include "mmc_ops.h"
@ -188,6 +189,20 @@ int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
return 0;
}
int mmc_send_ext_addr(struct mmc_host *host, u32 addr)
{
struct mmc_command cmd = {
.opcode = SD_ADDR_EXT,
.arg = addr,
.flags = MMC_RSP_R1 | MMC_CMD_AC,
};
if (!mmc_card_ult_capacity(host->card))
return 0;
return mmc_wait_for_cmd(host, &cmd, 0);
}
static int __mmc_send_if_cond(struct mmc_host *host, u32 ocr, u8 pcie_bits,
u32 *resp)
{

1
drivers/mmc/core/sd_ops.h
View File

@ -21,6 +21,7 @@ int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca);
int mmc_app_send_scr(struct mmc_card *card);
int mmc_app_sd_status(struct mmc_card *card, void *ssr);
int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card);
int mmc_send_ext_addr(struct mmc_host *host, u32 addr);
#endif

3
include/linux/mmc/sd.h
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@ -15,6 +15,9 @@
#define SD_SEND_IF_COND 8 /* bcr [11:0] See below R7 */
#define SD_SWITCH_VOLTAGE 11 /* ac R1 */
/* Class 2 */
#define SD_ADDR_EXT 22 /* ac [5:0] R1 */
/* class 10 */
#define SD_SWITCH 6 /* adtc [31:0] See below R1 */