Messages in this thread Patch in this message | | | From | Rajiv Andrade <> | Subject | [PATCH 2/2] tpm_nuvoton_i2c: Use exported symbol for status probe | Date | Tue, 7 Feb 2012 11:06:54 -0200 |
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Removed internal tpm_i2c_wait_for_stat() in favor of already exported wait_for_tpm_stat().
Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com> --- drivers/char/tpm/tpm_nuvoton_i2c.c | 92 +++++++----------------------------- 1 files changed, 18 insertions(+), 74 deletions(-)
diff --git a/drivers/char/tpm/tpm_nuvoton_i2c.c b/drivers/char/tpm/tpm_nuvoton_i2c.c index daf0d49..0ad67e7 100644 --- a/drivers/char/tpm/tpm_nuvoton_i2c.c +++ b/drivers/char/tpm/tpm_nuvoton_i2c.c @@ -170,63 +170,12 @@ static int tpm_i2c_get_burstcount(struct i2c_client *tpm_i2c_client, return burst_count; } -/* - * WPCT301/NPCT501 SINT# supports only dataAvail - * any call to this function which is not waiting for dataAvail will - * set queue to NULL to avoid waiting for interrupt - */ -static bool tpm_i2c_check_status(struct tpm_chip *chip, u8 mask, u8 value) -{ - u8 status = tpm_i2c_read_status(chip); - return (status != TPM_STS_ERR_VAL) && ((status & mask) == value); -} - -static int tpm_i2c_wait_for_stat(struct tpm_chip *chip, u8 mask, u8 value, - u32 timeout, wait_queue_head_t * queue) -{ - unsigned long ten_msec, stop; - bool status_valid; - s32 rc; - - /* check current status */ - status_valid = tpm_i2c_check_status(chip, mask, value); - if (status_valid) - return 0; - if (chip->vendor.irq && !queue) { - /* use interrupt to wait for the event */ - rc = wait_event_interruptible_timeout(*queue, - tpm_i2c_check_status(chip, - mask, - value), - timeout); - if (rc > 0) - return 0; - } else { - /* use polling to wait for the event */ - ten_msec = jiffies + msecs_to_jiffies(TPM_I2C_RETRY_DELAY_LONG); - stop = jiffies + timeout; - do { - if (time_before(jiffies, ten_msec)) - msleep(TPM_I2C_RETRY_DELAY_SHORT); - else - msleep(TPM_I2C_RETRY_DELAY_LONG); - status_valid = tpm_i2c_check_status(chip, mask, value); - if (status_valid) - return 0; - } while (time_before(jiffies, stop)); - } - dev_err(chip->dev, "%s(%02x, %02x) -> timeout\n", __func__, mask, - value); - return -ETIMEDOUT; -} - /* wait for dataAvail field to be set in the TPM_STS register */ static int tpm_i2c_wait_for_data_avail(struct tpm_chip *chip, u32 timeout, wait_queue_head_t * queue) { - return tpm_i2c_wait_for_stat(chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID, - TPM_STS_DATA_AVAIL | TPM_STS_VALID, - timeout, queue); + return wait_for_tpm_stat(chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID, + timeout, queue); } /* Read @count bytes into @buf from TPM_RD_FIFO register */ @@ -326,10 +275,10 @@ static int tpm_i2c_recv(struct tpm_chip *chip, u8 * buf, size_t count) size = -EIO; continue; } - if (tpm_i2c_wait_for_stat(chip, - TPM_STS_VALID | TPM_STS_DATA_AVAIL, - TPM_STS_VALID, chip->vendor.timeout_c, - NULL)) { + if (wait_for_tpm_stat(chip, + TPM_STS_VALID | TPM_STS_DATA_AVAIL, + chip->vendor.timeout_c, + NULL)) { dev_err(dev, "%s() error left over data\n", __func__); size = -ETIMEDOUT; continue; @@ -358,9 +307,8 @@ static int tpm_i2c_send(struct tpm_chip *chip, u8 * buf, size_t len) for (retries = 0; retries < TPM_RETRY; retries++) { tpm_i2c_ready(chip); - if (tpm_i2c_wait_for_stat(chip, TPM_STS_COMMAND_READY, - TPM_STS_COMMAND_READY, - chip->vendor.timeout_b, NULL)) { + if (wait_for_tpm_stat(chip, TPM_STS_COMMAND_READY, + chip->vendor.timeout_b, NULL)) { dev_err(dev, "%s() timeout on commandReady\n", __func__); rc = -EIO; @@ -387,13 +335,11 @@ static int tpm_i2c_send(struct tpm_chip *chip, u8 * buf, size_t len) } dev_dbg(dev, "%s(%d):", __func__, bytes2write); count += bytes2write; - rc = tpm_i2c_wait_for_stat(chip, - TPM_STS_VALID | - TPM_STS_EXPECT, - TPM_STS_VALID | - TPM_STS_EXPECT, - chip->vendor.timeout_c, - NULL); + rc = wait_for_tpm_stat(chip, + TPM_STS_VALID | + TPM_STS_EXPECT, + chip->vendor.timeout_c, + NULL); if (rc < 0) { dev_err(dev, "%s() timeout on Expect\n", __func__); @@ -414,9 +360,8 @@ static int tpm_i2c_send(struct tpm_chip *chip, u8 * buf, size_t len) continue; } dev_dbg(dev, "%s(last): %02x", __func__, buf[count]); - rc = tpm_i2c_wait_for_stat(chip, TPM_STS_VALID | TPM_STS_EXPECT, - TPM_STS_VALID, - chip->vendor.timeout_c, NULL); + rc = wait_for_tpm_stat(chip, TPM_STS_VALID | TPM_STS_EXPECT, + chip->vendor.timeout_c, NULL); if (rc) { dev_err(dev, "%s() timeout on Expect to clear\n", __func__); @@ -616,10 +561,9 @@ static int tpm_i2c_probe(struct i2c_client *client, /* Clear any pending interrupt */ tpm_i2c_ready(chip); /* - wait for TPM_STS==0xA0 (stsValid, commandReady) */ - rc = tpm_i2c_wait_for_stat(chip, TPM_STS_COMMAND_READY, - TPM_STS_COMMAND_READY, - chip->vendor.timeout_b, - NULL); + rc = wait_for_tpm_stat(chip, TPM_STS_COMMAND_READY, + chip->vendor.timeout_b, + NULL); if (rc == 0) { /* * TIS is in ready state -- 1.7.3.4
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