litmus-rt.git/drivers/char/tpm/Makefile, branch test

tpm/tpm_i2c_stm_st33: Split tpm_i2c_tpm_st33 in 2 layers (core + phy)

2015-03-18T21:43:06+00:00

tpm_i2c_stm_st33 is a TIS 1.2 TPM with a core interface which can be used
by different phy such as i2c or spi. The core part is called st33zp24 which
is also the main part reference.

include/linux/platform_data/tpm_stm_st33.h is renamed consequently.
The driver is also split into an i2c phy in charge of sending/receiving
data as well as managing platform data or dts configuration.

Acked-by: Jarkko Sakkinen 
Reviewed-by: Jason Gunthorpe 
Signed-off-by: Christophe Ricard 
Signed-off-by: Peter Huewe

tpm: TPM 2.0 CRB Interface

2015-01-17T13:00:12+00:00

tpm_crb is a driver for TPM 2.0 Command Response Buffer (CRB) Interface
as defined in PC Client Platform TPM Profile (PTP) Specification.

Only polling and single locality is supported as these are the limitations
of the available hardware, Platform Trust Techonlogy (PTT) in Haswell
CPUs.

The driver always applies CRB with ACPI start because PTT reports using
only ACPI start as start method but as a result of my testing it requires
also CRB start.

Signed-off-by: Jarkko Sakkinen 
Reviewed-by: Jasob Gunthorpe 
Reviewed-by: Stefan Berger 
Signed-off-by: Peter Huewe

tpm: TPM 2.0 baseline support

2015-01-17T13:00:11+00:00

TPM 2.0 devices are separated by adding a field 'flags' to struct
tpm_chip and defining a flag TPM_CHIP_FLAG_TPM2 for tagging them.

This patch adds the following internal functions:

- tpm2_get_random()
- tpm2_get_tpm_pt()
- tpm2_pcr_extend()
- tpm2_pcr_read()
- tpm2_startup()

Additionally, the following exported functions are implemented for
implementing TPM 2.0 device drivers:

- tpm2_do_selftest()
- tpm2_calc_ordinal_durations()
- tpm2_gen_interrupt()

The existing functions that are exported for the use for existing
subsystems have been changed to check the flags field in struct
tpm_chip and use appropriate TPM 2.0 counterpart if
TPM_CHIP_FLAG_TPM2 is est.

The code for tpm2_calc_ordinal_duration() and tpm2_startup() were
originally written by Will Arthur.

Signed-off-by: Jarkko Sakkinen 
Signed-off-by: Will Arthur 
Reviewed-by: Jasob Gunthorpe 
Reviewed-by: Stefan Berger 
Reviewed-by: Peter Huewe 
Tested-by: Peter Huewe 

[phuewe: Fixed copy paste error * 2]
Signed-off-by: Peter Huewe

tpm: two-phase chip management functions

2015-01-17T13:00:09+00:00

tpm_register_hardware() and tpm_remove_hardware() are called often
before initializing the device. The problem is that the device might
not be fully initialized when it comes visible to the user space.

This patch resolves the issue by diving initialization into two
parts:

- tpmm_chip_alloc() creates struct tpm_chip.

- tpm_chip_register() sets up the character device and sysfs
  attributes.

The framework takes care of freeing struct tpm_chip by using the devres
API. The broken release callback has been wiped. ACPI drivers do not
ever get this callback.

Regards to Jason Gunthorpe for carefully reviewing this part of the
code.

Signed-off-by: Jarkko Sakkinen 
Reviewed-by: Jasob Gunthorpe 
Reviewed-by: Stefan Berger 
Tested-by: Scot Doyle 
Tested-by: Peter Huewe 
[phuewe: update to upstream changes]
Signed-off-by: Peter Huewe

tpm/tpm_i2c_stm_st33: Update Kconfig in order to be inline to other similar product

2015-01-17T13:00:06+00:00

STMicroelectronics i2c tpm is the only one to have a different tristate
label.

Rename it "TPM Interface Specification 1.2 Interface (I2C - STMicroelectronics)"

Reviewed-by: Jason Gunthorpe 
Signed-off-by: Christophe Ricard 
[phuewe: corrected module name in the helptext]
Signed-off-by: Peter Huewe

tpm: Move sysfs functions from tpm-interface to tpm-sysfs

2014-01-06T13:37:24+00:00

CLASS-sysfs.c is a common idiom for linux subsystems.

This is the first step to pulling all the sysfs support code from
the drivers into tpm-sysfs. This is a plain text copy from tpm-interface
with support changes to make it compile.

_tpm_pcr_read is made non-static and is called tpm_pcr_read_dev.

Signed-off-by: Jason Gunthorpe 
Signed-off-by: Peter Huewe

tpm: Pull everything related to /dev/tpmX into tpm-dev.c

2014-01-06T13:37:24+00:00

CLASS-dev.c is a common idiom for Linux subsystems

This pulls all the code related to the miscdev into tpm-dev.c and makes it
static. The identical file_operation structs in the drivers are purged and the
tpm common code unconditionally creates the miscdev.

Signed-off-by: Jason Gunthorpe 
Reviewed-by: Joel Schopp 
Reviewed-by: Ashley Lai 
[phuewe:
tpm_dev_release is now used only in this file, thus the EXPORT_SYMBOL
can be dropped and the function be marked as static.
It has no other in-kernel users]
Signed-off-by: Peter Huewe

tpm: Add support for Atmel I2C TPMs

2013-10-22T17:43:07+00:00

This is based on the work of Teddy Reed  published
on GitHub:
 https://github.com/theopolis/tpm-i2c-atmel.git
 34894b988b67e0ae55088d6388e77b0dbf10c07d

That driver was never merged, I have taken it as a starting port,
forward ported, tested and revised the driver:
 - Make it broadly textually similar to the Infineon and Nuvoton I2C
   driver
 - Place everything in a format suitable for mainline inclusion
 - Use high level I2C functions i2c_master_send and
   i2c_master_recv for data xfer
 - Use the timeout system from the core code, by faking out a status
   register
 - Only I2C transfer the number of bytes in the reply, not a fixed
   message size.
 - checkpatch cleanups
 - Testing on ARM Kirkwood, with this device tree, using a
   AT97SC3204T-X1A180
        tpm@29 {
                compatible = "atmel,at97sc3204t";
                reg = <0x29>;
        };

Signed-off-by: Teddy Reed 
[jgg: revised and tested]
Signed-off-by: Jason Gunthorpe 
[phuewe: minor whitespace changes]

Signed-off-by: Peter Huewe

tpm: Add support for the Nuvoton NPCT501 I2C TPM

2013-10-22T17:43:04+00:00

This chip is/was also branded as a Winbond WPCT301.

Originally written by Dan Morav  and posted to LKML:
https://lkml.org/lkml/2011/9/7/206

The original posting was not merged, I have taken it as a
starting point, forward ported, tested and revised the driver:
 - Rework interrupt handling to work properly with level triggered
   interrupts. The old version just locked up.
 - Synchronize various items with Peter Huewe's Infineon driver:
    * Add durations/timeouts sysfs calls
    * Remove I2C device auto-detection
    * Don't fiddle with chip->release
    * Call tpm_dev_vendor_release in the probe error path
    * Use MODULE_DEVICE_TABLE for the I2C ids
    * Provide OF compatible strings for DT support
    * Use SIMPLE_DEV_PM_OPS
    * Use module_i2c_driver
 - checkpatch cleanups
 - Testing on ARM Kirkwood with GPIO interrupts, with this device tree:
	tpm@57 {
                compatible = "nuvoton,npct501";
                reg = <0x57>;
                interrupt-parent = <&gpio1>;
                interrupts = <6 IRQ_TYPE_LEVEL_LOW>;
        };

Signed-off-by: Dan Morav 
[jgg: revised and tested]
Signed-off-by: Jason Gunthorpe 
[phuewe: minor whitespace changes, fixed module name in kconfig]

Signed-off-by: Peter Huewe

tpm: Merge the tpm-bios module with tpm.o

2013-10-22T17:43:01+00:00

Now that we can have multiple .c files in the tpm module there is
no reason for tpm-bios.

tpm-bios exported several functions: tpm_bios_log_setup,
tpm_bios_log_teardown, tpm_add_ppi, and tpm_remove_ppi.

They are only used by tpm, and if tpm-bios is built then
tpm will unconditionally require them. Further, tpm-bios does
nothing on its own, it has no module_init function.

Thus we remove the exports and merge the modules to simplify things.

The Makefile conditions are changed slightly to match the code,
tpm_ppi is always required if CONFIG_ACPI is set.

Signed-off-by: Jason Gunthorpe