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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>
This commit is contained in:
Cyrille Pitchen 2017-01-26 17:07:57 +01:00 committed by Herbert Xu
parent 89a82ef87e
commit 0569fc46f0
1 changed files with 108 additions and 2 deletions
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110
drivers/crypto/atmel-sha.c
View File

@ -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);