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Diffstat (limited to 'src/drivers/i2c')
-rw-r--r--src/drivers/i2c/tpm/cr50.c46
1 files changed, 21 insertions, 25 deletions
diff --git a/src/drivers/i2c/tpm/cr50.c b/src/drivers/i2c/tpm/cr50.c
index 1423841231..6c12ee4e9e 100644
--- a/src/drivers/i2c/tpm/cr50.c
+++ b/src/drivers/i2c/tpm/cr50.c
@@ -59,7 +59,7 @@ __weak int tis_plat_irq_status(void)
}
/* Wait for interrupt to indicate the TPM is ready */
-static int cr50_i2c_wait_tpm_ready(struct tpm_chip *chip)
+static int cr50_i2c_wait_tpm_ready(void)
{
struct stopwatch sw;
@@ -76,7 +76,6 @@ static int cr50_i2c_wait_tpm_ready(struct tpm_chip *chip)
/*
* cr50_i2c_read() - read from TPM register
*
- * @chip: TPM chip information
* @addr: register address to read from
* @buffer: provided by caller
* @len: number of bytes to read
@@ -87,8 +86,7 @@ static int cr50_i2c_wait_tpm_ready(struct tpm_chip *chip)
*
* Return -1 on error, 0 on success.
*/
-static int cr50_i2c_read(struct tpm_chip *chip, uint8_t addr,
- uint8_t *buffer, size_t len)
+static int cr50_i2c_read(uint8_t addr, uint8_t *buffer, size_t len)
{
if (tpm_dev.addr == 0)
return -1;
@@ -103,7 +101,7 @@ static int cr50_i2c_read(struct tpm_chip *chip, uint8_t addr,
}
/* Wait for TPM to be ready with response data */
- if (cr50_i2c_wait_tpm_ready(chip) < 0)
+ if (cr50_i2c_wait_tpm_ready() < 0)
return -1;
/* Read response data from the TPM */
@@ -118,7 +116,6 @@ static int cr50_i2c_read(struct tpm_chip *chip, uint8_t addr,
/*
* cr50_i2c_write() - write to TPM register
*
- * @chip: TPM chip information
* @addr: register address to write to
* @buffer: data to write
* @len: number of bytes to write
@@ -129,8 +126,7 @@ static int cr50_i2c_read(struct tpm_chip *chip, uint8_t addr,
*
* Returns -1 on error, 0 on success.
*/
-static int cr50_i2c_write(struct tpm_chip *chip,
- uint8_t addr, uint8_t *buffer, size_t len)
+static int cr50_i2c_write(uint8_t addr, uint8_t *buffer, size_t len)
{
if (tpm_dev.addr == 0)
return -1;
@@ -151,7 +147,7 @@ static int cr50_i2c_write(struct tpm_chip *chip,
}
/* Wait for TPM to be ready */
- return cr50_i2c_wait_tpm_ready(chip);
+ return cr50_i2c_wait_tpm_ready();
}
/*
@@ -161,7 +157,7 @@ static int cr50_i2c_write(struct tpm_chip *chip,
* This function will make sure that the AP does not proceed with boot until
* TPM finished reset processing.
*/
-static int process_reset(struct tpm_chip *chip)
+static int process_reset(void)
{
struct stopwatch sw;
int rv = 0;
@@ -180,7 +176,7 @@ static int process_reset(struct tpm_chip *chip)
const uint8_t mask =
TPM_ACCESS_VALID | TPM_ACCESS_ACTIVE_LOCALITY;
- rv = cr50_i2c_read(chip, TPM_ACCESS(0),
+ rv = cr50_i2c_read(TPM_ACCESS(0),
&access, sizeof(access));
if (rv || ((access & mask) == mask)) {
/*
@@ -212,12 +208,12 @@ static int process_reset(struct tpm_chip *chip)
* the RO did not release it), or not yet claimed, if this is verstage or the
* older RO did release it.
*/
-static int claim_locality(struct tpm_chip *chip)
+static int claim_locality(void)
{
uint8_t access;
const uint8_t mask = TPM_ACCESS_VALID | TPM_ACCESS_ACTIVE_LOCALITY;
- if (cr50_i2c_read(chip, TPM_ACCESS(0), &access, sizeof(access)))
+ if (cr50_i2c_read(TPM_ACCESS(0), &access, sizeof(access)))
return -1;
if ((access & mask) == mask) {
@@ -226,11 +222,11 @@ static int claim_locality(struct tpm_chip *chip)
}
access = TPM_ACCESS_REQUEST_USE;
- if (cr50_i2c_write(chip, TPM_ACCESS(0),
+ if (cr50_i2c_write(TPM_ACCESS(0),
&access, sizeof(access)))
return -1;
- if (cr50_i2c_read(chip, TPM_ACCESS(0), &access, sizeof(access)))
+ if (cr50_i2c_read(TPM_ACCESS(0), &access, sizeof(access)))
return -1;
if ((access & mask) != mask) {
@@ -245,7 +241,7 @@ static int claim_locality(struct tpm_chip *chip)
static uint8_t cr50_i2c_tis_status(struct tpm_chip *chip)
{
uint8_t buf[4];
- if (cr50_i2c_read(chip, TPM_STS(chip->vendor.locality),
+ if (cr50_i2c_read(TPM_STS(chip->vendor.locality),
buf, sizeof(buf)) < 0) {
printk(BIOS_ERR, "%s: Failed to read status\n", __func__);
return 0;
@@ -257,7 +253,7 @@ static uint8_t cr50_i2c_tis_status(struct tpm_chip *chip)
static void cr50_i2c_tis_ready(struct tpm_chip *chip)
{
uint8_t buf[4] = { TPM_STS_COMMAND_READY };
- cr50_i2c_write(chip, TPM_STS(chip->vendor.locality), buf, sizeof(buf));
+ cr50_i2c_write(TPM_STS(chip->vendor.locality), buf, sizeof(buf));
mdelay(CR50_TIMEOUT_SHORT_MS);
}
@@ -272,7 +268,7 @@ static int cr50_i2c_wait_burststs(struct tpm_chip *chip, uint8_t mask,
stopwatch_init_msecs_expire(&sw, CR50_TIMEOUT_LONG_MS);
while (!stopwatch_expired(&sw)) {
- if (cr50_i2c_read(chip, TPM_STS(chip->vendor.locality),
+ if (cr50_i2c_read(TPM_STS(chip->vendor.locality),
buf, sizeof(buf)) != 0) {
mdelay(CR50_TIMEOUT_SHORT_MS);
continue;
@@ -310,7 +306,7 @@ static int cr50_i2c_tis_recv(struct tpm_chip *chip, uint8_t *buf,
}
/* Read first chunk of burstcnt bytes */
- if (cr50_i2c_read(chip, addr, buf, burstcnt) != 0) {
+ if (cr50_i2c_read(addr, buf, burstcnt) != 0) {
printk(BIOS_ERR, "%s: Read failed\n", __func__);
goto out_err;
}
@@ -331,7 +327,7 @@ static int cr50_i2c_tis_recv(struct tpm_chip *chip, uint8_t *buf,
goto out_err;
len = MIN(burstcnt, expected - current);
- if (cr50_i2c_read(chip, addr, buf + current, len) != 0) {
+ if (cr50_i2c_read(addr, buf + current, len) != 0) {
printk(BIOS_ERR, "%s: Read failed\n", __func__);
goto out_err;
}
@@ -390,7 +386,7 @@ static int cr50_i2c_tis_send(struct tpm_chip *chip, uint8_t *buf, size_t len)
/* Use burstcnt - 1 to account for the address byte
* that is inserted by cr50_i2c_write() */
limit = MIN(burstcnt - 1, len);
- if (cr50_i2c_write(chip, TPM_DATA_FIFO(chip->vendor.locality),
+ if (cr50_i2c_write(TPM_DATA_FIFO(chip->vendor.locality),
&buf[sent], limit) != 0) {
printk(BIOS_ERR, "%s: Write failed\n", __func__);
goto out_err;
@@ -409,7 +405,7 @@ static int cr50_i2c_tis_send(struct tpm_chip *chip, uint8_t *buf, size_t len)
}
/* Start the TPM command */
- if (cr50_i2c_write(chip, TPM_STS(chip->vendor.locality), tpm_go,
+ if (cr50_i2c_write(TPM_STS(chip->vendor.locality), tpm_go,
sizeof(tpm_go)) < 0) {
printk(BIOS_ERR, "%s: Start command failed\n", __func__);
goto out_err;
@@ -454,7 +450,7 @@ static int cr50_i2c_probe(struct tpm_chip *chip, uint32_t *did_vid)
for (retries = 20; retries > 0; retries--) {
int rc;
- rc = cr50_i2c_read(chip, TPM_DID_VID(0), (uint8_t *)did_vid, 4);
+ rc = cr50_i2c_read(TPM_DID_VID(0), (uint8_t *)did_vid, 4);
/* Exit once DID and VID verified */
if (!rc && (*did_vid == CR50_DID_VID)) {
@@ -492,10 +488,10 @@ int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr)
return -1;
if (ENV_SEPARATE_VERSTAGE || ENV_BOOTBLOCK)
- if (process_reset(chip))
+ if (process_reset())
return -1;
- if (claim_locality(chip))
+ if (claim_locality())
return -1;
printk(BIOS_DEBUG, "cr50 TPM 2.0 (i2c %u:0x%02x id 0x%x)\n",
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 00:07:04 +0000