From: Will Arthur <[email protected]> Detect TPM 2.0 by using the extended STS (STS3) register. For TPM 2.0, instead of calling tpm_get_timeouts(), assign duration and timeout values defined in the TPM 2.0 PTP specification.
Signed-off-by: Will Arthur <[email protected]> Signed-off-by: Jarkko Sakkinen <[email protected]> --- drivers/char/tpm/tpm_tis.c | 80 ++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 67 insertions(+), 13 deletions(-) diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index 89e1abb..71cbb2d 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -1,5 +1,6 @@ /* * Copyright (C) 2005, 2006 IBM Corporation + * Copyright (C) 2014 Intel Corporation * * Authors: * Leendert van Doorn <[email protected]> @@ -44,6 +45,10 @@ enum tis_status { TPM_STS_DATA_EXPECT = 0x08, }; +enum tis_status3 { + TPM_STS3_TPM2_FAM = 0x04, +}; + enum tis_int_flags { TPM_GLOBAL_INT_ENABLE = 0x80000000, TPM_INTF_BURST_COUNT_STATIC = 0x100, @@ -70,6 +75,7 @@ enum tis_defaults { #define TPM_INT_STATUS(l) (0x0010 | ((l) << 12)) #define TPM_INTF_CAPS(l) (0x0014 | ((l) << 12)) #define TPM_STS(l) (0x0018 | ((l) << 12)) +#define TPM_STS3(l) (0x001b | ((l) << 12)) #define TPM_DATA_FIFO(l) (0x0024 | ((l) << 12)) #define TPM_DID_VID(l) (0x0F00 | ((l) << 12)) @@ -363,6 +369,7 @@ static int tpm_tis_send_main(struct tpm_chip *chip, u8 *buf, size_t len) { int rc; u32 ordinal; + unsigned long dur; rc = tpm_tis_send_data(chip, buf, len); if (rc < 0) @@ -374,9 +381,14 @@ static int tpm_tis_send_main(struct tpm_chip *chip, u8 *buf, size_t len) if (chip->vendor.irq) { ordinal = be32_to_cpu(*((__be32 *) (buf + 6))); + + if (chip->flags & TPM_CHIP_FLAG_TPM2) + dur = tpm2_calc_ordinal_duration(chip, ordinal); + else + dur = tpm_calc_ordinal_duration(chip, ordinal); + if (wait_for_tpm_stat - (chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID, - tpm_calc_ordinal_duration(chip, ordinal), + (chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID, dur, &chip->vendor.read_queue, false) < 0) { rc = -ETIME; goto out_err; @@ -588,6 +600,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle, int rc, i, irq_s, irq_e, probe; struct tpm_chip *chip; struct priv_data *priv; + u8 sts3; priv = devm_kzalloc(dev, sizeof(struct priv_data), GFP_KERNEL); if (priv == NULL) @@ -604,11 +617,28 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle, if (!chip->vendor.iobase) return -EIO; + sts3 = ioread8(chip->vendor.iobase + TPM_STS3(1)); + if ((sts3 & TPM_STS3_TPM2_FAM) == TPM_STS3_TPM2_FAM) + chip->flags = TPM_CHIP_FLAG_TPM2; + /* Default timeouts */ - chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT); - chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT); - chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT); - chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT); + if (chip->flags & TPM_CHIP_FLAG_TPM2) { + chip->vendor.timeout_a = usecs_to_jiffies(TPM2_TIMEOUT_A); + chip->vendor.timeout_b = usecs_to_jiffies(TPM2_TIMEOUT_B); + chip->vendor.timeout_c = usecs_to_jiffies(TPM2_TIMEOUT_C); + chip->vendor.timeout_d = usecs_to_jiffies(TPM2_TIMEOUT_D); + chip->vendor.duration[TPM_SHORT] = + usecs_to_jiffies(TPM2_DURATION_SHORT); + chip->vendor.duration[TPM_MEDIUM] = + usecs_to_jiffies(TPM2_DURATION_MEDIUM); + chip->vendor.duration[TPM_LONG] = + usecs_to_jiffies(TPM2_DURATION_LONG); + } else { + chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT); + chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT); + chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT); + chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT); + } if (wait_startup(chip, 0) != 0) { rc = -ENODEV; @@ -623,8 +653,8 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle, vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0)); chip->vendor.manufacturer_id = vendor; - dev_info(dev, - "1.2 TPM (device-id 0x%X, rev-id %d)\n", + dev_info(dev, "%s TPM (device-id 0x%X, rev-id %d)\n", + (chip->flags & TPM_CHIP_FLAG_TPM2) ? "2.0" : "1.2", vendor >> 16, ioread8(chip->vendor.iobase + TPM_RID(0))); if (!itpm) { @@ -665,6 +695,23 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle, if (intfcaps & TPM_INTF_DATA_AVAIL_INT) dev_dbg(dev, "\tData Avail Int Support\n"); + /* get the timeouts before testing for irqs */ + if (!(chip->flags & TPM_CHIP_FLAG_TPM2) && tpm_get_timeouts(chip)) { + dev_err(dev, "Could not get TPM timeouts and durations\n"); + rc = -ENODEV; + goto out_err; + } + + if (chip->flags & TPM_CHIP_FLAG_TPM2) + rc = tpm2_do_selftest(chip); + else + rc = tpm_do_selftest(chip); + if (rc) { + dev_err(dev, "TPM self test failed\n"); + rc = -ENODEV; + goto out_err; + } + /* INTERRUPT Setup */ init_waitqueue_head(&chip->vendor.read_queue); init_waitqueue_head(&chip->vendor.int_queue); @@ -720,7 +767,10 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle, chip->vendor.probed_irq = 0; /* Generate Interrupts */ - tpm_gen_interrupt(chip); + if (chip->flags & TPM_CHIP_FLAG_TPM2) + tpm2_gen_interrupt(chip); + else + tpm_gen_interrupt(chip); chip->vendor.irq = chip->vendor.probed_irq; @@ -808,14 +858,18 @@ static void tpm_tis_reenable_interrupts(struct tpm_chip *chip) static int tpm_tis_resume(struct device *dev) { struct tpm_chip *chip = dev_get_drvdata(dev); - int ret; + int ret = 0; if (chip->vendor.irq) tpm_tis_reenable_interrupts(chip); - ret = tpm_pm_resume(dev); - if (!ret) - tpm_do_selftest(chip); + if (chip->flags & TPM_CHIP_FLAG_TPM2) + tpm2_do_selftest(chip); + else { + ret = tpm_pm_resume(dev); + if (!ret) + tpm_do_selftest(chip); + } return ret; } -- 2.1.0 ------------------------------------------------------------------------------ Dive into the World of Parallel Programming! 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