From: amirmizi6@gmail.com
To: Eyal.Cohen@nuvoton.com, jarkko.sakkinen@linux.intel.com,
oshrialkoby85@gmail.com, alexander.steffen@infineon.com,
robh+dt@kernel.org, mark.rutland@arm.com, peterhuewe@gmx.de,
jgg@ziepe.ca, arnd@arndb.de, gregkh@linuxfoundation.org
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-integrity@vger.kernel.org, oshri.alkoby@nuvoton.com,
tmaimon77@gmail.com, gcwilson@us.ibm.com, kgoldman@us.ibm.com,
ayna@linux.vnet.ibm.com, Dan.Morav@nuvoton.com,
oren.tanami@nuvoton.com, shmulik.hagar@nuvoton.com,
amir.mizinski@nuvoton.com, Amir Mizinski <amirmizi6@gmail.com>
Subject: [PATCH v1 1/5] char: tpm: Make implementation of read16 read32 write32 optional
Date: Sun, 10 Nov 2019 18:21:33 +0200 [thread overview]
Message-ID: <20191110162137.230913-2-amirmizi6@gmail.com> (raw)
In-Reply-To: <20191110162137.230913-1-amirmizi6@gmail.com>
From: Amir Mizinski <amirmizi6@gmail.com>
Only tpm_tis has a faster way to access multiple bytes at once, every other
driver will just fall back to read_bytes/write_bytes. Therefore, move this
common code out of tpm_tis_spi into tpm_tis_core, so that it is
automatically used when low-level drivers do not implement the specialized
methods.
this commit is based on previous work by Alexander Steffen
Signed-off-by: Amir Mizinski <amirmizi6@gmail.com>
---
drivers/char/tpm/tpm_tis_core.h | 38 +++++++++++++++++++++++++++++++++++---
drivers/char/tpm/tpm_tis_spi.c | 41 -----------------------------------------
2 files changed, 35 insertions(+), 44 deletions(-)
diff --git a/drivers/char/tpm/tpm_tis_core.h b/drivers/char/tpm/tpm_tis_core.h
index 7337819..d06c65b 100644
--- a/drivers/char/tpm/tpm_tis_core.h
+++ b/drivers/char/tpm/tpm_tis_core.h
@@ -122,13 +122,35 @@ static inline int tpm_tis_read8(struct tpm_tis_data *data, u32 addr, u8 *result)
static inline int tpm_tis_read16(struct tpm_tis_data *data, u32 addr,
u16 *result)
{
- return data->phy_ops->read16(data, addr, result);
+ __le16 result_le;
+ int rc;
+
+ if (data->phy_ops->read16)
+ return data->phy_ops->read16(data, addr, result);
+
+ rc = data->phy_ops->read_bytes(data, addr, sizeof(u16),
+ (u8 *)&result_le);
+ if (!rc)
+ *result = le16_to_cpu(result_le);
+
+ return rc;
}
static inline int tpm_tis_read32(struct tpm_tis_data *data, u32 addr,
u32 *result)
{
- return data->phy_ops->read32(data, addr, result);
+ __le32 result_le;
+ int rc;
+
+ if (data->phy_ops->read32)
+ return data->phy_ops->read32(data, addr, result);
+
+ rc = data->phy_ops->read_bytes(data, addr, sizeof(u32),
+ (u8 *)&result_le);
+ if (!rc)
+ *result = le32_to_cpu(result_le);
+
+ return rc;
}
static inline int tpm_tis_write_bytes(struct tpm_tis_data *data, u32 addr,
@@ -145,7 +167,17 @@ static inline int tpm_tis_write8(struct tpm_tis_data *data, u32 addr, u8 value)
static inline int tpm_tis_write32(struct tpm_tis_data *data, u32 addr,
u32 value)
{
- return data->phy_ops->write32(data, addr, value);
+ __le32 value_le;
+ int rc;
+
+ if (data->phy_ops->write32)
+ return data->phy_ops->write32(data, addr, value);
+
+ value_le = cpu_to_le32(value);
+ rc = data->phy_ops->write_bytes(data, addr, sizeof(u32),
+ (u8 *)&value_le);
+
+ return rc;
}
static inline bool is_bsw(void)
diff --git a/drivers/char/tpm/tpm_tis_spi.c b/drivers/char/tpm/tpm_tis_spi.c
index 19513e6..da82924 100644
--- a/drivers/char/tpm/tpm_tis_spi.c
+++ b/drivers/char/tpm/tpm_tis_spi.c
@@ -146,50 +146,9 @@ static int tpm_tis_spi_write_bytes(struct tpm_tis_data *data, u32 addr,
return tpm_tis_spi_transfer(data, addr, len, NULL, value);
}
-static int tpm_tis_spi_read16(struct tpm_tis_data *data, u32 addr, u16 *result)
-{
- __le16 result_le;
- int rc;
-
- rc = data->phy_ops->read_bytes(data, addr, sizeof(u16),
- (u8 *)&result_le);
- if (!rc)
- *result = le16_to_cpu(result_le);
-
- return rc;
-}
-
-static int tpm_tis_spi_read32(struct tpm_tis_data *data, u32 addr, u32 *result)
-{
- __le32 result_le;
- int rc;
-
- rc = data->phy_ops->read_bytes(data, addr, sizeof(u32),
- (u8 *)&result_le);
- if (!rc)
- *result = le32_to_cpu(result_le);
-
- return rc;
-}
-
-static int tpm_tis_spi_write32(struct tpm_tis_data *data, u32 addr, u32 value)
-{
- __le32 value_le;
- int rc;
-
- value_le = cpu_to_le32(value);
- rc = data->phy_ops->write_bytes(data, addr, sizeof(u32),
- (u8 *)&value_le);
-
- return rc;
-}
-
static const struct tpm_tis_phy_ops tpm_spi_phy_ops = {
.read_bytes = tpm_tis_spi_read_bytes,
.write_bytes = tpm_tis_spi_write_bytes,
- .read16 = tpm_tis_spi_read16,
- .read32 = tpm_tis_spi_read32,
- .write32 = tpm_tis_spi_write32,
};
static int tpm_tis_spi_probe(struct spi_device *dev)
--
2.7.4
next prev parent reply other threads:[~2019-11-10 16:33 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-10 16:21 [PATCH v1 0/5] add tpm i2c ptp driver amirmizi6
2019-11-10 16:21 ` amirmizi6 [this message]
2019-11-10 16:21 ` [PATCH v1 2/5] char: tpm: Add check_data handle to tpm_tis_phy_ops in order to check data integrity amirmizi6
2019-11-12 20:22 ` Jarkko Sakkinen
2019-11-10 16:21 ` [PATCH v1 3/5] char: tpm: rewrite "tpm_tis_req_canceled()" amirmizi6
2019-11-10 18:00 ` Jerry Snitselaar
2019-11-12 1:25 ` Stefan Berger
2019-11-10 16:21 ` [PATCH v1 4/5] dt-bindings: tpm: Add the TPM TIS I2C device tree binding documentaion amirmizi6
2019-11-14 19:10 ` Rob Herring
2019-11-24 18:02 ` Amir Mizinski
2019-11-10 16:21 ` [PATCH v1 5/5] char: tpm: add tpm_tis_i2c driver amirmizi6
2019-12-02 13:01 [PATCH v1 0/5] add tpm i2c ptp driver amirmizi6
2019-12-02 13:01 ` [PATCH v1 1/5] char: tpm: Make implementation of read16 read32 write32 optional amirmizi6
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