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Date: Tue, 7 Feb 2012 11:06:54 -0200
From: Rajiv Andrade <srajiv@...ux.vnet.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: Dan.Morav@...oton.com, KC@...oton.com,
Rajiv Andrade <srajiv@...ux.vnet.ibm.com>
Subject: [PATCH 2/2] tpm_nuvoton_i2c: Use exported symbol for status probe
Removed internal tpm_i2c_wait_for_stat() in favor of already exported
wait_for_tpm_stat().
Signed-off-by: Rajiv Andrade <srajiv@...ux.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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