diff options
Diffstat (limited to 'drivers/char/tpm/tpm_tis_i2c.c')
| -rw-r--r-- | drivers/char/tpm/tpm_tis_i2c.c | 69 |
1 files changed, 43 insertions, 26 deletions
diff --git a/drivers/char/tpm/tpm_tis_i2c.c b/drivers/char/tpm/tpm_tis_i2c.c index 0692510dfcab..6cd07dd34507 100644 --- a/drivers/char/tpm/tpm_tis_i2c.c +++ b/drivers/char/tpm/tpm_tis_i2c.c @@ -49,7 +49,7 @@ /* Masks with bits that must be read zero */ #define TPM_ACCESS_READ_ZERO 0x48 -#define TPM_INT_ENABLE_ZERO 0x7FFFFF6 +#define TPM_INT_ENABLE_ZERO 0x7FFFFF60 #define TPM_STS_READ_ZERO 0x23 #define TPM_INTF_CAPABILITY_ZERO 0x0FFFF000 #define TPM_I2C_INTERFACE_CAPABILITY_ZERO 0x80000000 @@ -189,21 +189,28 @@ static int tpm_tis_i2c_read_bytes(struct tpm_tis_data *data, u32 addr, u16 len, int ret; for (i = 0; i < TPM_RETRY; i++) { - /* write register */ - msg.len = sizeof(reg); - msg.buf = ® - msg.flags = 0; - ret = tpm_tis_i2c_retry_transfer_until_ack(data, &msg); - if (ret < 0) - return ret; - - /* read data */ - msg.buf = result; - msg.len = len; - msg.flags = I2C_M_RD; - ret = tpm_tis_i2c_retry_transfer_until_ack(data, &msg); - if (ret < 0) - return ret; + u16 read = 0; + + while (read < len) { + /* write register */ + msg.len = sizeof(reg); + msg.buf = ® + msg.flags = 0; + ret = tpm_tis_i2c_retry_transfer_until_ack(data, &msg); + if (ret < 0) + return ret; + + /* read data */ + msg.buf = result + read; + msg.len = len - read; + msg.flags = I2C_M_RD; + if (msg.len > I2C_SMBUS_BLOCK_MAX) + msg.len = I2C_SMBUS_BLOCK_MAX; + ret = tpm_tis_i2c_retry_transfer_until_ack(data, &msg); + if (ret < 0) + return ret; + read += msg.len; + } ret = tpm_tis_i2c_sanity_check_read(reg, len, result); if (ret == 0) @@ -223,19 +230,27 @@ static int tpm_tis_i2c_write_bytes(struct tpm_tis_data *data, u32 addr, u16 len, struct i2c_msg msg = { .addr = phy->i2c_client->addr }; u8 reg = tpm_tis_i2c_address_to_register(addr); int ret; + u16 wrote = 0; if (len > TPM_BUFSIZE - 1) return -EIO; - /* write register and data in one go */ phy->io_buf[0] = reg; - memcpy(phy->io_buf + sizeof(reg), value, len); - - msg.len = sizeof(reg) + len; msg.buf = phy->io_buf; - ret = tpm_tis_i2c_retry_transfer_until_ack(data, &msg); - if (ret < 0) - return ret; + while (wrote < len) { + /* write register and data in one go */ + msg.len = sizeof(reg) + len - wrote; + if (msg.len > I2C_SMBUS_BLOCK_MAX) + msg.len = I2C_SMBUS_BLOCK_MAX; + + memcpy(phy->io_buf + sizeof(reg), value + wrote, + msg.len - sizeof(reg)); + + ret = tpm_tis_i2c_retry_transfer_until_ack(data, &msg); + if (ret < 0) + return ret; + wrote += msg.len - sizeof(reg); + } return 0; } @@ -312,8 +327,7 @@ static const struct tpm_tis_phy_ops tpm_i2c_phy_ops = { .verify_crc = tpm_tis_i2c_verify_crc, }; -static int tpm_tis_i2c_probe(struct i2c_client *dev, - const struct i2c_device_id *id) +static int tpm_tis_i2c_probe(struct i2c_client *dev) { struct tpm_tis_i2c_phy *phy; const u8 crc_enable = 1; @@ -329,6 +343,7 @@ static int tpm_tis_i2c_probe(struct i2c_client *dev, if (!phy->io_buf) return -ENOMEM; + set_bit(TPM_TIS_DEFAULT_CANCELLATION, &phy->priv.flags); phy->i2c_client = dev; /* must precede all communication with the tpm */ @@ -360,7 +375,7 @@ static void tpm_tis_i2c_remove(struct i2c_client *client) } static const struct i2c_device_id tpm_tis_i2c_id[] = { - { "tpm_tis_i2c", 0 }, + { "tpm_tis_i2c" }, {} }; MODULE_DEVICE_TABLE(i2c, tpm_tis_i2c_id); @@ -368,6 +383,8 @@ MODULE_DEVICE_TABLE(i2c, tpm_tis_i2c_id); #ifdef CONFIG_OF static const struct of_device_id of_tis_i2c_match[] = { { .compatible = "infineon,slb9673", }, + { .compatible = "nuvoton,npct75x", }, + { .compatible = "tcg,tpm-tis-i2c", }, {} }; MODULE_DEVICE_TABLE(of, of_tis_i2c_match); |