diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/crypto/tegra-se.c | 29 | ||||
| -rw-r--r-- | drivers/crypto/tegra-se.h | 3 |
2 files changed, 32 insertions, 0 deletions
diff --git a/drivers/crypto/tegra-se.c b/drivers/crypto/tegra-se.c index 658b89cd5bd6..655520a1db8a 100644 --- a/drivers/crypto/tegra-se.c +++ b/drivers/crypto/tegra-se.c @@ -274,6 +274,34 @@ static int tegra_init_key_slot(struct tegra_se_dev *se_dev) return 0; } +static void tegra_se_key_read_disable(u8 slot_num) +{ + struct tegra_se_dev *se_dev = sg_tegra_se_dev; + u32 val; + + val = se_readl(se_dev, + (SE_KEY_TABLE_ACCESS_REG_OFFSET + (slot_num * 4))); + val &= ~(1 << SE_KEY_READ_DISABLE_SHIFT); + se_writel(se_dev, + val, (SE_KEY_TABLE_ACCESS_REG_OFFSET + (slot_num * 4))); + return 0; +} + +static void tegra_se_key_read_disable_all(void) +{ + struct tegra_se_dev *se_dev = sg_tegra_se_dev; + u8 slot_num; + + mutex_lock(&se_hw_lock); + tegra_se_clk_enable(se_dev->pclk); + + for (slot_num = 0; slot_num < TEGRA_SE_KEYSLOT_COUNT; slot_num++) + tegra_se_key_read_disable(slot_num); + + tegra_se_clk_disable(se_dev->pclk); + mutex_unlock(&se_hw_lock); +} + static void tegra_se_config_algo(struct tegra_se_dev *se_dev, enum tegra_se_aes_op_mode mode, bool encrypt, u32 key_len) { @@ -1896,6 +1924,7 @@ static int tegra_se_probe(struct platform_device *pdev) } sg_tegra_se_dev = se_dev; + tegra_se_key_read_disable_all(); err = tegra_se_alloc_ll_buf(se_dev, SE_MAX_SRC_SG_COUNT, SE_MAX_DST_SG_COUNT); diff --git a/drivers/crypto/tegra-se.h b/drivers/crypto/tegra-se.h index ec0685671ac8..8c54df8991e6 100644 --- a/drivers/crypto/tegra-se.h +++ b/drivers/crypto/tegra-se.h @@ -207,6 +207,9 @@ TEGRA_SE_RNG_DT_SIZE) #define TEGRA_SE_AES_CMAC_DIGEST_SIZE 16 +#define SE_KEY_TABLE_ACCESS_REG_OFFSET 0x284 +#define SE_KEY_READ_DISABLE_SHIFT 0 + #define SE_CONTEXT_BUFER_SIZE 1072 #define SE_CONTEXT_SAVE_RANDOM_DATA_OFFSET 0 #define SE_CONTEXT_SAVE_RANDOM_DATA_SIZE 16 |