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author | Cyrille Pitchen <cyrille.pitchen@atmel.com> | 2017-01-26 17:07:57 +0100 |
---|---|---|
committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-02-03 18:16:14 +0800 |
commit | 0569fc46f09b46dc313f27c45283a7b62d96390a (patch) | |
tree | 9db7a619bd2e82fa98515b43cd47f89772ed567e /drivers/crypto/atmel-sha.c | |
parent | 89a82ef87e012061989fcaf7dd51d706ff2090e3 (diff) | |
download | op-kernel-dev-0569fc46f09b46dc313f27c45283a7b62d96390a.zip op-kernel-dev-0569fc46f09b46dc313f27c45283a7b62d96390a.tar.gz |
crypto: atmel-sha - add verbose debug facilities to print hw register names
When VERBOSE_DEBUG is defined and SHA_FLAGS_DUMP_REG flag is set in
dd->flags, this patch prints the register names and values when performing
IO accesses.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/atmel-sha.c')
-rw-r--r-- | drivers/crypto/atmel-sha.c | 110 |
1 files changed, 108 insertions, 2 deletions
diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c index cc5294d..22d0c0c 100644 --- a/drivers/crypto/atmel-sha.c +++ b/drivers/crypto/atmel-sha.c @@ -51,6 +51,7 @@ #define SHA_FLAGS_INIT BIT(4) #define SHA_FLAGS_CPU BIT(5) #define SHA_FLAGS_DMA_READY BIT(6) +#define SHA_FLAGS_DUMP_REG BIT(7) /* bits[11:8] are reserved. */ @@ -167,14 +168,118 @@ static struct atmel_sha_drv atmel_sha = { .lock = __SPIN_LOCK_UNLOCKED(atmel_sha.lock), }; +#ifdef VERBOSE_DEBUG +static const char *atmel_sha_reg_name(u32 offset, char *tmp, size_t sz, bool wr) +{ + switch (offset) { + case SHA_CR: + return "CR"; + + case SHA_MR: + return "MR"; + + case SHA_IER: + return "IER"; + + case SHA_IDR: + return "IDR"; + + case SHA_IMR: + return "IMR"; + + case SHA_ISR: + return "ISR"; + + case SHA_MSR: + return "MSR"; + + case SHA_BCR: + return "BCR"; + + case SHA_REG_DIN(0): + case SHA_REG_DIN(1): + case SHA_REG_DIN(2): + case SHA_REG_DIN(3): + case SHA_REG_DIN(4): + case SHA_REG_DIN(5): + case SHA_REG_DIN(6): + case SHA_REG_DIN(7): + case SHA_REG_DIN(8): + case SHA_REG_DIN(9): + case SHA_REG_DIN(10): + case SHA_REG_DIN(11): + case SHA_REG_DIN(12): + case SHA_REG_DIN(13): + case SHA_REG_DIN(14): + case SHA_REG_DIN(15): + snprintf(tmp, sz, "IDATAR[%u]", (offset - SHA_REG_DIN(0)) >> 2); + break; + + case SHA_REG_DIGEST(0): + case SHA_REG_DIGEST(1): + case SHA_REG_DIGEST(2): + case SHA_REG_DIGEST(3): + case SHA_REG_DIGEST(4): + case SHA_REG_DIGEST(5): + case SHA_REG_DIGEST(6): + case SHA_REG_DIGEST(7): + case SHA_REG_DIGEST(8): + case SHA_REG_DIGEST(9): + case SHA_REG_DIGEST(10): + case SHA_REG_DIGEST(11): + case SHA_REG_DIGEST(12): + case SHA_REG_DIGEST(13): + case SHA_REG_DIGEST(14): + case SHA_REG_DIGEST(15): + if (wr) + snprintf(tmp, sz, "IDATAR[%u]", + 16u + ((offset - SHA_REG_DIGEST(0)) >> 2)); + else + snprintf(tmp, sz, "ODATAR[%u]", + (offset - SHA_REG_DIGEST(0)) >> 2); + break; + + case SHA_HW_VERSION: + return "HWVER"; + + default: + snprintf(tmp, sz, "0x%02x", offset); + break; + } + + return tmp; +} + +#endif /* VERBOSE_DEBUG */ + static inline u32 atmel_sha_read(struct atmel_sha_dev *dd, u32 offset) { - return readl_relaxed(dd->io_base + offset); + u32 value = readl_relaxed(dd->io_base + offset); + +#ifdef VERBOSE_DEBUG + if (dd->flags & SHA_FLAGS_DUMP_REG) { + char tmp[16]; + + dev_vdbg(dd->dev, "read 0x%08x from %s\n", value, + atmel_sha_reg_name(offset, tmp, sizeof(tmp), false)); + } +#endif /* VERBOSE_DEBUG */ + + return value; } static inline void atmel_sha_write(struct atmel_sha_dev *dd, u32 offset, u32 value) { +#ifdef VERBOSE_DEBUG + if (dd->flags & SHA_FLAGS_DUMP_REG) { + char tmp[16]; + + dev_vdbg(dd->dev, "write 0x%08x into %s\n", value, + atmel_sha_reg_name(offset, tmp, sizeof(tmp), true)); + } +#endif /* VERBOSE_DEBUG */ + writel_relaxed(value, dd->io_base + offset); } @@ -183,7 +288,8 @@ static inline int atmel_sha_complete(struct atmel_sha_dev *dd, int err) struct ahash_request *req = dd->req; dd->flags &= ~(SHA_FLAGS_BUSY | SHA_FLAGS_FINAL | SHA_FLAGS_CPU | - SHA_FLAGS_DMA_READY | SHA_FLAGS_OUTPUT_READY); + SHA_FLAGS_DMA_READY | SHA_FLAGS_OUTPUT_READY | + SHA_FLAGS_DUMP_REG); clk_disable(dd->iclk); |