diff options
Diffstat (limited to 'drivers/tpm')
| -rw-r--r-- | drivers/tpm/tpm_tis_i2c.c | 52 | ||||
| -rw-r--r-- | drivers/tpm/tpm_tis_i2c.h | 17 |
2 files changed, 25 insertions, 44 deletions
diff --git a/drivers/tpm/tpm_tis_i2c.c b/drivers/tpm/tpm_tis_i2c.c index 3ae1a4e..81a3bb5 100644 --- a/drivers/tpm/tpm_tis_i2c.c +++ b/drivers/tpm/tpm_tis_i2c.c @@ -34,9 +34,6 @@ DECLARE_GLOBAL_DATA_PTR; -/* Max buffer size supported by our tpm */ -#define TPM_DEV_BUFSIZE 1260 - /* Max number of iterations after i2c NAK */ #define MAX_COUNT 3 @@ -78,12 +75,6 @@ enum tis_defaults { #define TPM_TIS_I2C_DID_VID_9635 0x000b15d1L #define TPM_TIS_I2C_DID_VID_9645 0x001a15d1L -enum i2c_chip_type { - SLB9635, - SLB9645, - UNKNOWN, -}; - static const char * const chip_name[] = { [SLB9635] = "slb9635tt", [SLB9645] = "slb9645tt", @@ -390,18 +381,8 @@ struct tpm { char inited; } tpm; -/* Global structure for tpm chip data */ static struct tpm_chip g_chip; -/* Structure to store I2C TPM specific stuff */ -struct tpm_dev { - struct udevice *dev; - u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */ - enum i2c_chip_type chip_type; -}; - -static struct tpm_dev tpm_dev; - /* * iic_tpm_read() - read from TPM register * @addr: register address to read from @@ -422,10 +403,10 @@ static int iic_tpm_read(u8 addr, u8 *buffer, size_t len) int count; uint32_t addrbuf = addr; - if ((tpm_dev.chip_type == SLB9635) || (tpm_dev.chip_type == UNKNOWN)) { + if ((g_chip.chip_type == SLB9635) || (g_chip.chip_type == UNKNOWN)) { /* slb9635 protocol should work in both cases */ for (count = 0; count < MAX_COUNT; count++) { - rc = dm_i2c_write(tpm_dev.dev, 0, (uchar *)&addrbuf, 1); + rc = dm_i2c_write(g_chip.dev, 0, (uchar *)&addrbuf, 1); if (rc == 0) break; /* Success, break to skip sleep */ udelay(SLEEP_DURATION); @@ -439,7 +420,7 @@ static int iic_tpm_read(u8 addr, u8 *buffer, size_t len) */ for (count = 0; count < MAX_COUNT; count++) { udelay(SLEEP_DURATION); - rc = dm_i2c_read(tpm_dev.dev, 0, buffer, len); + rc = dm_i2c_read(g_chip.dev, 0, buffer, len); if (rc == 0) break; /* success, break to skip sleep */ } @@ -452,7 +433,7 @@ 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++) { - rc = dm_i2c_read(tpm_dev.dev, addr, buffer, len); + rc = dm_i2c_read(g_chip.dev, addr, buffer, len); if (rc == 0) break; /* break here to skip sleep */ udelay(SLEEP_DURATION); @@ -474,7 +455,7 @@ static int iic_tpm_write_generic(u8 addr, u8 *buffer, size_t len, int count; for (count = 0; count < max_count; count++) { - rc = dm_i2c_write(tpm_dev.dev, addr, buffer, len); + rc = dm_i2c_write(g_chip.dev, addr, buffer, len); if (rc == 0) break; /* Success, break to skip sleep */ udelay(sleep_time); @@ -809,7 +790,7 @@ out_err: return rc; } -static enum i2c_chip_type tpm_vendor_chip_type(void) +static enum i2c_chip_type tpm_tis_i2c_chip_type(void) { #if CONFIG_IS_ENABLED(OF_CONTROL) const void *blob = gd->fdt_blob; @@ -823,14 +804,14 @@ static enum i2c_chip_type tpm_vendor_chip_type(void) return UNKNOWN; } -int tpm_vendor_init(struct udevice *dev) +static int tpm_tis_i2c_init(struct udevice *dev) { struct tpm_chip *chip = &g_chip; u32 vendor; u32 expected_did_vid; - tpm_dev.dev = dev; - tpm_dev.chip_type = tpm_vendor_chip_type(); + g_chip.dev = dev; + g_chip.chip_type = tpm_tis_i2c_chip_type(); chip->is_open = 1; /* Disable interrupts (not supported) */ @@ -854,7 +835,7 @@ int tpm_vendor_init(struct udevice *dev) return -EIO; } - if (tpm_dev.chip_type == SLB9635) { + if (g_chip.chip_type == SLB9635) { vendor = be32_to_cpu(vendor); expected_did_vid = TPM_TIS_I2C_DID_VID_9635; } else { @@ -862,13 +843,13 @@ int tpm_vendor_init(struct udevice *dev) expected_did_vid = TPM_TIS_I2C_DID_VID_9645; } - if (tpm_dev.chip_type != UNKNOWN && vendor != expected_did_vid) { + if (g_chip.chip_type != UNKNOWN && vendor != expected_did_vid) { error("Vendor id did not match! ID was %08x\n", vendor); return -ENODEV; } debug("1.2 TPM (chip type %s device-id 0x%X)\n", - chip_name[tpm_dev.chip_type], vendor >> 16); + chip_name[g_chip.chip_type], vendor >> 16); /* * A timeout query to TPM can be placed here. @@ -878,11 +859,6 @@ int tpm_vendor_init(struct udevice *dev) return 0; } -void tpm_vendor_cleanup(struct tpm_chip *chip) -{ - release_locality(chip, chip->locality, 1); -} - /* Returns max number of milliseconds to wait */ static unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal) @@ -980,7 +956,7 @@ 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); + rc = tpm_tis_i2c_init(dev); if (rc < 0) g_chip.is_open = 0; return rc; @@ -989,7 +965,7 @@ static int tpm_open_dev(struct udevice *dev) static void tpm_close(void) { if (g_chip.is_open) { - tpm_vendor_cleanup(&g_chip); + release_locality(&g_chip, g_chip.locality, 1); g_chip.is_open = 0; } } diff --git a/drivers/tpm/tpm_tis_i2c.h b/drivers/tpm/tpm_tis_i2c.h index 2a4ad77..0fec464 100644 --- a/drivers/tpm/tpm_tis_i2c.h +++ b/drivers/tpm/tpm_tis_i2c.h @@ -33,7 +33,14 @@ enum tpm_timeout { #define TPM_RSP_SIZE_BYTE 2 #define TPM_RSP_RC_BYTE 6 -struct tpm_chip; +/* Max buffer size supported by our tpm */ +#define TPM_DEV_BUFSIZE 1260 + +enum i2c_chip_type { + SLB9635, + SLB9645, + UNKNOWN, +}; struct tpm_chip { int is_open; @@ -44,6 +51,9 @@ struct tpm_chip { int locality; unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* msec */ unsigned long duration[3]; /* msec */ + struct udevice *dev; + u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */ + enum i2c_chip_type chip_type; }; struct tpm_input_header { @@ -102,9 +112,4 @@ struct tpm_cmd_t { union tpm_cmd_params params; } __packed; -struct udevice; -int tpm_vendor_init(struct udevice *dev); - -void tpm_vendor_cleanup(struct tpm_chip *chip); - #endif |