Hi,
I'm using the sdhci-iproc host controller on my board (running linux-4.9).
When I try to access to the RPMB partition I get the following message.
mmc0: Timeout waiting for hardware interrupt.
sdhci: =========== REGISTER DUMP (mmc0)===========
sdhci: Sys addr: 0x7e820000 | Version: 0x0000ac02
sdhci: Blk size: 0x00007200 | Blk cnt: 0x00000000
sdhci: Argument: 0x00000000 | Trn mode: 0x00000027
sdhci: Present: 0x01f70002 | Host ctl: 0x00000017
sdhci: Power: 0x0000000f | Blk gap: 0x00000000
sdhci: Wake-up: 0x00000000 | Clock: 0x00000207
sdhci: Timeout: 0x0000000e | Int stat: 0x00000000
sdhci: Int enab: 0x02ff008b | Sig enab: 0x02ff008b
sdhci: AC12 err: 0x00000002 | Slot int: 0x00000000
sdhci: Caps: 0x05e80000 | Caps_1: 0x03002075
sdhci: Cmd: 0x0000193a | Max curr: 0x00000001
sdhci: Host ctl2: 0x0000800c
sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x7f30c210
sdhci: ===========================================
sdhci-iproc 18041000.sdhci: __mmc_blk_ioctl_cmd: data error -110
RPMB ioctl failed: Connection timed out
The controller has the auto-cmd12 feature wich make the RPMB cmd incorrect.
Because the cmd23 is sent separately and an incorrect CMD12 is added
during the operation (from what I understand).
A dirty patch to make it works could be (on top of 4.9) :
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index c411f7a68641..d0d1fd9cfad5 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -464,6 +464,7 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card
*card, struct mmc_blk_data *md,
struct mmc_blk_ioc_data *idata)
{
struct mmc_command cmd = {0};
+ struct mmc_command sbc = {0};
struct mmc_data data = {0};
struct mmc_request mrq = {NULL};
struct scatterlist sg;
@@ -530,10 +531,12 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card
*card, struct mmc_blk_data *md,
}
if (is_rpmb) {
- err = mmc_set_blockcount(card, data.blocks,
- idata->ic.write_flag & (1 << 31));
- if (err)
- return err;
+ sbc.opcode = MMC_SET_BLOCK_COUNT;
+ sbc.arg = data.blocks & 0x0000FFFF;
+ if (idata->ic.write_flag & (1 << 31))
+ sbc.arg |= 1 << 31;
+ sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
+ mrq.sbc = &sbc;
}
if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
But this patch will break other controller. Do you know a proper way
to fix this issue ?
Thanks,
Clement
