aboutsummaryrefslogtreecommitdiff
path: root/src/drivers/i2c/tpm/tpm.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/drivers/i2c/tpm/tpm.c')
-rw-r--r--src/drivers/i2c/tpm/tpm.c77
1 files changed, 35 insertions, 42 deletions
diff --git a/src/drivers/i2c/tpm/tpm.c b/src/drivers/i2c/tpm/tpm.c
index e0950849fc..71641d0edc 100644
--- a/src/drivers/i2c/tpm/tpm.c
+++ b/src/drivers/i2c/tpm/tpm.c
@@ -28,7 +28,6 @@
*/
-#include <arch/early_variables.h>
#include <commonlib/endian.h>
#include <stdint.h>
#include <string.h>
@@ -81,7 +80,7 @@ struct tpm_inf_dev {
enum i2c_chip_type chip_type;
};
-static struct tpm_inf_dev g_tpm_dev CAR_GLOBAL;
+static struct tpm_inf_dev g_tpm_dev;
/*
* iic_tpm_read() - read from TPM register
@@ -99,24 +98,23 @@ static struct tpm_inf_dev g_tpm_dev CAR_GLOBAL;
*/
static int iic_tpm_read(uint8_t addr, uint8_t *buffer, size_t len)
{
- struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev);
int rc;
int count;
- if (tpm_dev->addr == 0)
+ if (g_tpm_dev.addr == 0)
return -1;
- switch (tpm_dev->chip_type) {
+ switch (g_tpm_dev.chip_type) {
case SLB9635:
case UNKNOWN:
/* slb9635 protocol should work in both cases */
for (count = 0; count < MAX_COUNT; count++) {
- rc = i2c_write_raw(tpm_dev->bus, tpm_dev->addr,
+ rc = i2c_write_raw(g_tpm_dev.bus, g_tpm_dev.addr,
&addr, 1);
if (rc == 0)
break; /* success, break to skip sleep */
- udelay(tpm_dev->sleep_short);
+ udelay(g_tpm_dev.sleep_short);
}
if (rc)
@@ -127,8 +125,8 @@ static int iic_tpm_read(uint8_t addr, uint8_t *buffer, size_t len)
* retrieving the data
*/
for (count = 0; count < MAX_COUNT; count++) {
- udelay(tpm_dev->sleep_short);
- rc = i2c_read_raw(tpm_dev->bus, tpm_dev->addr,
+ udelay(g_tpm_dev.sleep_short);
+ rc = i2c_read_raw(g_tpm_dev.bus, g_tpm_dev.addr,
buffer, len);
if (rc == 0)
break; /* success, break to skip sleep */
@@ -144,23 +142,23 @@ static int iic_tpm_read(uint8_t addr, uint8_t *buffer, size_t len)
* retries should usually not be needed, but are kept just to
* be safe on the safe side.
*/
- struct i2c_msg aseg = { .flags = 0, .slave = tpm_dev->addr,
+ struct i2c_msg aseg = { .flags = 0, .slave = g_tpm_dev.addr,
.buf = &addr, .len = 1 };
struct i2c_msg dseg = { .flags = I2C_M_RD,
- .slave = tpm_dev->addr,
+ .slave = g_tpm_dev.addr,
.buf = buffer, .len = len };
for (count = 0; count < MAX_COUNT; count++) {
- rc = i2c_transfer(tpm_dev->bus, &aseg, 1) ||
- i2c_transfer(tpm_dev->bus, &dseg, 1);
+ rc = i2c_transfer(g_tpm_dev.bus, &aseg, 1) ||
+ i2c_transfer(g_tpm_dev.bus, &dseg, 1);
if (rc == 0)
break; /* break here to skip sleep */
- udelay(tpm_dev->sleep_short);
+ udelay(g_tpm_dev.sleep_short);
}
}
}
/* take care of 'guard time' */
- udelay(tpm_dev->sleep_short);
+ udelay(g_tpm_dev.sleep_short);
if (rc)
return -1;
@@ -171,7 +169,6 @@ static int iic_tpm_write_generic(uint8_t addr, uint8_t *buffer, size_t len,
unsigned int sleep_time,
uint8_t max_count)
{
- struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev);
int rc = 0;
int count;
@@ -182,14 +179,14 @@ static int iic_tpm_write_generic(uint8_t addr, uint8_t *buffer, size_t len,
}
/* prepare send buffer */
- tpm_dev->buf[0] = addr;
- memcpy(&(tpm_dev->buf[1]), buffer, len);
+ g_tpm_dev.buf[0] = addr;
+ memcpy(&(g_tpm_dev.buf[1]), buffer, len);
- if (tpm_dev->addr == 0)
+ if (g_tpm_dev.addr == 0)
return -1;
for (count = 0; count < max_count; count++) {
- rc = i2c_write_raw(tpm_dev->bus, tpm_dev->addr,
- tpm_dev->buf, len + 1);
+ rc = i2c_write_raw(g_tpm_dev.bus, g_tpm_dev.addr,
+ g_tpm_dev.buf, len + 1);
if (rc == 0)
break; /* success, break to skip sleep */
@@ -197,7 +194,7 @@ static int iic_tpm_write_generic(uint8_t addr, uint8_t *buffer, size_t len,
}
/* take care of 'guard time' */
- udelay(tpm_dev->sleep_short);
+ udelay(g_tpm_dev.sleep_short);
if (rc)
return -1;
@@ -222,8 +219,7 @@ static int iic_tpm_write_generic(uint8_t addr, uint8_t *buffer, size_t len,
*/
static int iic_tpm_write(uint8_t addr, uint8_t *buffer, size_t len)
{
- struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev);
- return iic_tpm_write_generic(addr, buffer, len, tpm_dev->sleep_short,
+ return iic_tpm_write_generic(addr, buffer, len, g_tpm_dev.sleep_short,
MAX_COUNT);
}
@@ -233,8 +229,7 @@ static int iic_tpm_write(uint8_t addr, uint8_t *buffer, size_t len)
* */
static int iic_tpm_write_long(uint8_t addr, uint8_t *buffer, size_t len)
{
- struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev);
- return iic_tpm_write_generic(addr, buffer, len, tpm_dev->sleep_long,
+ return iic_tpm_write_generic(addr, buffer, len, g_tpm_dev.sleep_long,
MAX_COUNT_LONG);
}
@@ -479,17 +474,16 @@ out_err:
int tpm_vendor_probe(unsigned int bus, uint32_t addr)
{
- struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev);
struct stopwatch sw;
uint8_t buf = 0;
int ret;
long sw_run_duration = SLEEP_DURATION_PROBE_MS;
- tpm_dev->chip_type = UNKNOWN;
- tpm_dev->bus = bus;
- tpm_dev->addr = addr;
- tpm_dev->sleep_short = SLEEP_DURATION;
- tpm_dev->sleep_long = SLEEP_DURATION_LONG;
+ g_tpm_dev.chip_type = UNKNOWN;
+ g_tpm_dev.bus = bus;
+ g_tpm_dev.addr = addr;
+ g_tpm_dev.sleep_short = SLEEP_DURATION;
+ g_tpm_dev.sleep_long = SLEEP_DURATION_LONG;
/*
* Probe TPM. Check if the TPM_ACCESS register's ValidSts bit is set(1)
@@ -521,7 +515,6 @@ int tpm_vendor_probe(unsigned int bus, uint32_t addr)
int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr)
{
- struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev);
uint32_t vendor;
if (dev_addr == 0) {
@@ -529,11 +522,11 @@ int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr)
return -1;
}
- tpm_dev->chip_type = UNKNOWN;
- tpm_dev->bus = bus;
- tpm_dev->addr = dev_addr;
- tpm_dev->sleep_short = SLEEP_DURATION;
- tpm_dev->sleep_long = SLEEP_DURATION_LONG;
+ g_tpm_dev.chip_type = UNKNOWN;
+ g_tpm_dev.bus = bus;
+ g_tpm_dev.addr = dev_addr;
+ g_tpm_dev.sleep_short = SLEEP_DURATION;
+ g_tpm_dev.sleep_long = SLEEP_DURATION_LONG;
memset(&chip->vendor, 0, sizeof(struct tpm_vendor_specific));
chip->is_open = 1;
@@ -554,9 +547,9 @@ int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr)
goto out_err;
if (vendor == TPM_TIS_I2C_DID_VID_9645) {
- tpm_dev->chip_type = SLB9645;
+ g_tpm_dev.chip_type = SLB9645;
} else if (be32_to_cpu(vendor) == TPM_TIS_I2C_DID_VID_9635) {
- tpm_dev->chip_type = SLB9635;
+ g_tpm_dev.chip_type = SLB9635;
} else {
printk(BIOS_DEBUG, "Vendor ID 0x%08x not recognized.\n",
vendor);
@@ -564,8 +557,8 @@ int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr)
}
printk(BIOS_DEBUG, "I2C TPM %u:%02x (chip type %s device-id 0x%X)\n",
- tpm_dev->bus, tpm_dev->addr,
- chip_name[tpm_dev->chip_type], vendor >> 16);
+ g_tpm_dev.bus, g_tpm_dev.addr,
+ chip_name[g_tpm_dev.chip_type], vendor >> 16);
/*
* A timeout query to TPM can be placed here.
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 14:52:09 +0000