Table 41 of the JEDEC standard for eMMC says that bit 31 of
the command argument is obsolete when issuing the ERASE
command (CMD38) on page 115 of this document:
http://www.jedec.org/sites/default/files/docs/jesd84-B45.pdf
The SD Card Association Physical Layer Simplified Specification also
makes no mention of the use of bit 31.
https://www.sdcard.org/downloads/pls/part1_410.pdf
The Linux kernel distinguishes between secure (bit 31 set) and
non-secure erase, and this patch copies the macro names from
include/linux/mmc/core.h.
Tested-by: Fabio Estevam <fabio.este...@freescale.com>
Signed-off-by: Eric Nelson <e...@nelint.com>
---
drivers/mmc/mmc_write.c | 2 +-
include/mmc.h | 7 ++++++-
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/mmc_write.c b/drivers/mmc/mmc_write.c
index 7aea7e9..221bf30 100644
--- a/drivers/mmc/mmc_write.c
+++ b/drivers/mmc/mmc_write.c
@@ -51,7 +51,7 @@ static ulong mmc_erase_t(struct mmc *mmc, ulong start,
lbaint_t blkcnt)
goto err_out;
cmd.cmdidx = MMC_CMD_ERASE;
- cmd.cmdarg = SECURE_ERASE;
+ cmd.cmdarg = MMC_ERASE_ARG;
cmd.resp_type = MMC_RSP_R1b;
err = mmc_send_cmd(mmc, &cmd, NULL);
diff --git a/include/mmc.h b/include/mmc.h
index cda9a19..b89962a 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -121,7 +121,12 @@
#define OCR_VOLTAGE_MASK 0x007FFF80
#define OCR_ACCESS_MODE 0x60000000
-#define SECURE_ERASE 0x80000000
+#define MMC_ERASE_ARG 0x00000000
+#define MMC_SECURE_ERASE_ARG 0x80000000
+#define MMC_TRIM_ARG 0x00000001
+#define MMC_DISCARD_ARG 0x00000003
+#define MMC_SECURE_TRIM1_ARG 0x80000001
+#define MMC_SECURE_TRIM2_ARG 0x80008000
#define MMC_STATUS_MASK (~0x0206BF7F)
#define MMC_STATUS_SWITCH_ERROR (1 << 7)
--
2.6.2
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