diff options
Diffstat (limited to 'src/drivers/i2c/tpm/tpm.c')
-rw-r--r-- | src/drivers/i2c/tpm/tpm.c | 77 |
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. |