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-rw-r--r--drivers/tpm/tpm.c108
-rw-r--r--drivers/tpm/tpm_private.h4
-rw-r--r--drivers/tpm/tpm_tis_i2c.c74
3 files changed, 7 insertions, 179 deletions
diff --git a/drivers/tpm/tpm.c b/drivers/tpm/tpm.c
index a650892..24997f6 100644
--- a/drivers/tpm/tpm.c
+++ b/drivers/tpm/tpm.c
@@ -49,13 +49,7 @@ DECLARE_GLOBAL_DATA_PTR;
/* TPM configuration */
struct tpm {
-#ifdef CONFIG_DM_I2C
struct udevice *dev;
-#else
- int i2c_bus;
- int slave_addr;
- int old_bus;
-#endif
char inited;
} tpm;
@@ -441,7 +435,6 @@ out:
return rc;
}
-#ifdef CONFIG_DM_I2C
static int tpm_open_dev(struct udevice *dev)
{
int rc;
@@ -449,24 +442,12 @@ static int tpm_open_dev(struct udevice *dev)
debug("%s: start\n", __func__);
if (g_chip.is_open)
return -EBUSY;
- rc = tpm_vendor_init_dev(dev);
+ rc = tpm_vendor_init(dev);
if (rc < 0)
g_chip.is_open = 0;
return rc;
}
-#else
-static int tpm_open(uint32_t dev_addr)
-{
- int rc;
- if (g_chip.is_open)
- return -EBUSY;
- rc = tpm_vendor_init(dev_addr);
- if (rc < 0)
- g_chip.is_open = 0;
- return rc;
-}
-#endif
static void tpm_close(void)
{
if (g_chip.is_open) {
@@ -475,42 +456,6 @@ static void tpm_close(void)
}
}
-static int tpm_select(void)
-{
-#ifndef CONFIG_DM_I2C
- int ret;
-
- tpm.old_bus = i2c_get_bus_num();
- if (tpm.old_bus != tpm.i2c_bus) {
- ret = i2c_set_bus_num(tpm.i2c_bus);
- if (ret) {
- debug("%s: Fail to set i2c bus %d\n", __func__,
- tpm.i2c_bus);
- return -1;
- }
- }
-#endif
- return 0;
-}
-
-static int tpm_deselect(void)
-{
-#ifndef CONFIG_DM_I2C
- int ret;
-
- if (tpm.old_bus != i2c_get_bus_num()) {
- ret = i2c_set_bus_num(tpm.old_bus);
- if (ret) {
- debug("%s: Fail to restore i2c bus %d\n",
- __func__, tpm.old_bus);
- return -1;
- }
- }
- tpm.old_bus = -1;
-#endif
- return 0;
-}
-
/**
* Decode TPM configuration.
*
@@ -520,8 +465,11 @@ static int tpm_deselect(void)
static int tpm_decode_config(struct tpm *dev)
{
const void *blob = gd->fdt_blob;
+ struct udevice *bus;
+ int chip_addr;
int parent;
int node;
+ int ret;
node = fdtdec_next_compatible(blob, 0, COMPAT_INFINEON_SLB9635_TPM);
if (node < 0) {
@@ -537,10 +485,6 @@ static int tpm_decode_config(struct tpm *dev)
debug("%s: Cannot find node parent\n", __func__);
return -1;
}
-#ifdef CONFIG_DM_I2C
- struct udevice *bus;
- int chip_addr;
- int ret;
/*
* TODO(sjg@chromium.org): Remove this when driver model supports
@@ -569,15 +513,6 @@ static int tpm_decode_config(struct tpm *dev)
fdt_get_name(blob, node, NULL), ret);
return ret;
}
-#else
- int i2c_bus;
-
- i2c_bus = i2c_get_bus_num_fdt(parent);
- if (i2c_bus < 0)
- return -1;
- dev->i2c_bus = i2c_bus;
- dev->slave_addr = fdtdec_get_addr(blob, node, "reg");
-#endif
return 0;
}
@@ -602,22 +537,6 @@ int tis_init(void)
if (tpm_decode_config(&tpm))
return -1;
- if (tpm_select())
- return -1;
-
-#ifndef CONFIG_DM_I2C
- /*
- * Probe TPM twice; the first probing might fail because TPM is asleep,
- * and the probing can wake up TPM.
- */
- if (i2c_probe(tpm.slave_addr) && i2c_probe(tpm.slave_addr)) {
- debug("%s: fail to probe i2c addr 0x%x\n", __func__,
- tpm.slave_addr);
- return -1;
- }
-#endif
-
- tpm_deselect();
debug("%s: done\n", __func__);
tpm.inited = 1;
@@ -632,16 +551,7 @@ int tis_open(void)
if (!tpm.inited)
return -1;
- if (tpm_select())
- return -1;
-
-#ifdef CONFIG_DM_I2C
rc = tpm_open_dev(tpm.dev);
-#else
- rc = tpm_open(tpm.slave_addr);
-#endif
-
- tpm_deselect();
return rc;
}
@@ -651,13 +561,8 @@ int tis_close(void)
if (!tpm.inited)
return -1;
- if (tpm_select())
- return -1;
-
tpm_close();
- tpm_deselect();
-
return 0;
}
@@ -675,13 +580,8 @@ int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
memcpy(buf, sendbuf, sbuf_size);
- if (tpm_select())
- return -1;
-
len = tpm_transmit(buf, sbuf_size);
- tpm_deselect();
-
if (len < 10) {
*rbuf_len = 0;
return -1;
diff --git a/drivers/tpm/tpm_private.h b/drivers/tpm/tpm_private.h
index 8894c98..daaf8b8 100644
--- a/drivers/tpm/tpm_private.h
+++ b/drivers/tpm/tpm_private.h
@@ -129,10 +129,8 @@ struct tpm_cmd_t {
struct tpm_chip *tpm_register_hardware(const struct tpm_vendor_specific *);
-int tpm_vendor_init(uint32_t dev_addr);
-
struct udevice;
-int tpm_vendor_init_dev(struct udevice *dev);
+int tpm_vendor_init(struct udevice *dev);
void tpm_vendor_cleanup(struct tpm_chip *chip);
diff --git a/drivers/tpm/tpm_tis_i2c.c b/drivers/tpm/tpm_tis_i2c.c
index cc740e9..b6eaef1 100644
--- a/drivers/tpm/tpm_tis_i2c.c
+++ b/drivers/tpm/tpm_tis_i2c.c
@@ -50,9 +50,6 @@
DECLARE_GLOBAL_DATA_PTR;
-/* Address of the TPM on the I2C bus */
-#define TPM_I2C_ADDR 0x20
-
/* Max buffer size supported by our tpm */
#define TPM_DEV_BUFSIZE 1260
@@ -73,13 +70,6 @@ DECLARE_GLOBAL_DATA_PTR;
#define TPM_HEADER_SIZE 10
-/*
- * Expected value for DIDVID register
- *
- * The only device the system knows about at this moment is Infineon slb9635.
- */
-#define TPM_TIS_I2C_DID_VID 0x000b15d1L
-
enum tis_access {
TPM_ACCESS_VALID = 0x80,
TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
@@ -123,21 +113,11 @@ static const char * const chip_name[] = {
/* Structure to store I2C TPM specific stuff */
struct tpm_dev {
-#ifdef CONFIG_DM_I2C
struct udevice *dev;
-#else
- uint addr;
-#endif
u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */
enum i2c_chip_type chip_type;
};
-static struct tpm_dev tpm_dev = {
-#ifndef CONFIG_DM_I2C
- .addr = TPM_I2C_ADDR
-#endif
-};
-
static struct tpm_dev tpm_dev;
/*
@@ -163,12 +143,7 @@ static int iic_tpm_read(u8 addr, u8 *buffer, size_t len)
if ((tpm_dev.chip_type == SLB9635) || (tpm_dev.chip_type == UNKNOWN)) {
/* slb9635 protocol should work in both cases */
for (count = 0; count < MAX_COUNT; count++) {
-#ifdef CONFIG_DM_I2C
rc = dm_i2c_write(tpm_dev.dev, 0, (uchar *)&addrbuf, 1);
-#else
- rc = i2c_write(tpm_dev.addr, 0, 0,
- (uchar *)&addrbuf, 1);
-#endif
if (rc == 0)
break; /* Success, break to skip sleep */
udelay(SLEEP_DURATION);
@@ -182,11 +157,7 @@ static int iic_tpm_read(u8 addr, u8 *buffer, size_t len)
*/
for (count = 0; count < MAX_COUNT; count++) {
udelay(SLEEP_DURATION);
-#ifdef CONFIG_DM_I2C
rc = dm_i2c_read(tpm_dev.dev, 0, buffer, len);
-#else
- rc = i2c_read(tpm_dev.addr, 0, 0, buffer, len);
-#endif
if (rc == 0)
break; /* success, break to skip sleep */
}
@@ -199,11 +170,7 @@ static int iic_tpm_read(u8 addr, u8 *buffer, size_t len)
* be safe on the safe side.
*/
for (count = 0; count < MAX_COUNT; count++) {
-#ifdef CONFIG_DM_I2C
rc = dm_i2c_read(tpm_dev.dev, addr, buffer, len);
-#else
- rc = i2c_read(tpm_dev.addr, addr, 1, buffer, len);
-#endif
if (rc == 0)
break; /* break here to skip sleep */
udelay(SLEEP_DURATION);
@@ -224,20 +191,8 @@ static int iic_tpm_write_generic(u8 addr, u8 *buffer, size_t len,
int rc = 0;
int count;
- /* Prepare send buffer */
-#ifndef CONFIG_DM_I2C
- tpm_dev.buf[0] = addr;
- memcpy(&(tpm_dev.buf[1]), buffer, len);
- buffer = tpm_dev.buf;
- len++;
-#endif
-
for (count = 0; count < max_count; count++) {
-#ifdef CONFIG_DM_I2C
rc = dm_i2c_write(tpm_dev.dev, addr, buffer, len);
-#else
- rc = i2c_write(tpm_dev.addr, 0, 0, buffer, len);
-#endif
if (rc == 0)
break; /* Success, break to skip sleep */
udelay(sleep_time);
@@ -597,12 +552,13 @@ static enum i2c_chip_type tpm_vendor_chip_type(void)
return UNKNOWN;
}
-static int tpm_vendor_init_common(void)
+int tpm_vendor_init(struct udevice *dev)
{
struct tpm_chip *chip;
u32 vendor;
u32 expected_did_vid;
+ tpm_dev.dev = dev;
tpm_dev.chip_type = tpm_vendor_chip_type();
chip = tpm_register_hardware(&tpm_tis_i2c);
@@ -651,32 +607,6 @@ static int tpm_vendor_init_common(void)
return 0;
}
-#ifdef CONFIG_DM_I2C
-/* Initialisation of i2c tpm */
-int tpm_vendor_init_dev(struct udevice *dev)
-{
- tpm_dev.dev = dev;
- return tpm_vendor_init_common();
-}
-#else
-/* Initialisation of i2c tpm */
-int tpm_vendor_init(uint32_t dev_addr)
-{
- uint old_addr;
- int rc = 0;
-
- old_addr = tpm_dev.addr;
- if (dev_addr != 0)
- tpm_dev.addr = dev_addr;
-
- rc = tpm_vendor_init_common();
- if (rc)
- tpm_dev.addr = old_addr;
-
- return rc;
-}
-#endif
-
void tpm_vendor_cleanup(struct tpm_chip *chip)
{
release_locality(chip, chip->vendor.locality, 1);
generated by cgit v1.1 at 2024-11-21 22:20:26 +0000