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tpm: wait for valid status

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The TPM specification says that the EXPECT_DATA bit is not valid until
the VALID bit is set. Wait for that bit to be set. Fixes problems with
Ifineon SPI TPM.

Signed-off-by: Roman Kapl <rka@sysgo.com>
This commit is contained in:
Roman Kapl 2019-05-16 18:32:48 +02:00 committed by Tom Rini
parent 2e8a720246
commit 27eb177b39
1 changed files with 10 additions and 2 deletions
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12
drivers/tpm/tpm2_tis_spi.c
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@ -295,6 +295,14 @@ static int tpm_tis_spi_wait_for_stat(struct udevice *dev, u8 mask,
return -ETIMEDOUT;
}
static u8 tpm_tis_spi_valid_status(struct udevice *dev, u8 *status)
{
struct tpm_chip *chip = dev_get_priv(dev);
return tpm_tis_spi_wait_for_stat(dev, TPM_STS_VALID,
chip->timeout_c, status);
}
static int tpm_tis_spi_get_burstcount(struct udevice *dev)
{
struct tpm_chip *chip = dev_get_priv(dev);
@ -455,7 +463,7 @@ static int tpm_tis_spi_send(struct udevice *dev, const u8 *buf, size_t len)
i += size;
}
ret = tpm_tis_spi_status(dev, &status);
ret = tpm_tis_spi_valid_status(dev, &status);
if (ret)
goto out_err;
@ -469,7 +477,7 @@ static int tpm_tis_spi_send(struct udevice *dev, const u8 *buf, size_t len)
if (ret)
goto out_err;
ret = tpm_tis_spi_status(dev, &status);
ret = tpm_tis_spi_valid_status(dev, &status);
if (ret)
goto out_err;