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2017-01-03i2c/tpm: Ignore 0xFF bytes for status and burstCountJulius Werner
We've found that the SLB9645 TPM sometimes seems to randomly start returning 0xFF bytes for all requests. The exact cause is yet unknown, but we should try to write our TIS code such that it avoids bad interactions with this kind of response (e.g. any wait_for_status() immediately succeeds because all "status bits" are set in the response). At least for status and burstCount readings we can say for sure that the value is nonsensical and we're already reading those in a loop until we get valid results anyway, so let's add code to explicitly discount 0xFF bytes. BRANCH=oak BUG=chrome-os-partner:55764 TEST=None Change-Id: I934d42c36d6847a22a185795cea49d282fa113d9 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/420470 Reviewed-by: Nicolas Boichat <drinkcat@chromium.org> Reviewed-on: https://review.coreboot.org/18006 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-12-16drivers/i2c/generic: Allow mainboards to export reset and enable GPIOsFurquan Shaikh
Add power management type config option that allows mainboards to either: 1. Define a power resource that uses the reset and enable gpios to power on and off the device using _ON and _OFF methods, or 2. Export reset and enable GPIOs in _CRS and _DSD so that the OS can directly toggle the GPIOs as required. GPIO type needs to be updated in drivers_i2c_generic_config to use acpi_gpio type so that it can be used for both the above cases. BUG=chrome-os-partner:60194 BRANCH=None TEST=Verified that elan touchscreen works fine on reef using exported GPIOs. Change-Id: I4d76f193f615cfc4520869dedc55505c109042f6 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17797 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
2016-12-16drivers/i2c/hid: Add generic I2C HID driverDuncan Laurie
Add a generic I2C-HID driver for these types of devices that do not need extra functionality. This allows a new device to be added without having to write a new driver. The i2c-hid PNP0C50 is automatically added as the _CID for the device in the ACPI Device. BUG=chrome-os-partner:58666 TEST=used on eve to describe a new i2c-hid touch controller Change-Id: I94e9531a72f9bf1d6b3ade362b88883b21b83d0a Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/17856 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins)
2016-12-15drivers/i2c: Pass in i2c_generic_config into i2c_generic_fill_ssdtFurquan Shaikh
Remove any assumptions required for the drivers using i2c_generic to have drivers_i2c_generic_config structure at the start of the driver config. Instead pass in a pointer to drivers_i2c_generic_config from the calling driver. Change-Id: I51dc4cad1c1f246b51891abf7115a7120e87b098 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17857 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins)
2016-12-15pcf8523: Fix wrong initialization of several registersWerner Zeh
In the case where the RTC is initialized after the battery is completely drained the bits for power_mode and cof_selection are set up with wrongly applied masks. In the case where the RTC is re-initialized again with no power-loss after the last initialization the bits for cap_sel, power_mode and cof_selection are not shifted to the right position. Both errors lead to a wrong initialization of the RTC and in turn to a way larger current consumption (instead of 120 nA the RTC current rises to over 2 µA). This patch fixes both errors and the current consumption is in the right range again. TEST=booted mc_bdx1 and verified current consumption of RTC Change-Id: I8594f6ac121a175844393952db2169dbc5cbd2b2 Signed-off-by: Werner Zeh <werner.zeh@siemens.com> Reviewed-on: https://review.coreboot.org/17829 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Martin Roth <martinroth@google.com>
2016-11-16drivers/i2c/alps: Add support for ALPS Touchpad driverBarnali Sarkar
Add support for I2C ALPS Touchpad Device Driver. BUG=none BRANCH=none TEST=Build and booted successfully on KBL RVP and Touchpad is working Change-Id: I78b77bd7c4694ccf61260724f593bd59545c70e6 Signed-off-by: Barnali Sarkar <barnali.sarkar@intel.com> Reviewed-on: https://review.coreboot.org/17390 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh <furquan@google.com>
2016-11-10drivers/i2c/wacom: Make the driver more genericFurquan Shaikh
Wacom I2C driver can be used by devices other than touchscreen. e.g. digitizer. So there is no need to name the driver with touchscreen specific attributes. Only a separate descriptor name is required that needs to be set by mainboard correctly. BUG=chrome-os-partner:56246 BRANCH=None TEST=Compiles successfully. Change-Id: I0d32a4adae477373b3f4c5f3abbe188860701194 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17341 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2016-11-09google/pyro: Update WACOM touchscreen ACPI _HIDJanice Li
WACOM request to add a new identifier `WCOMNTN2`, and use that for the board Pyro with all LCD combinations. BRANCH=master BUG=chrome-os-partner:58093 TEST=emerge-pyro vboot_reference coreboot chromeos-bootimage Signed-off-by: Janice Li <janice.li@quantatw.com> Change-Id: I95cf357efba958d7e864d2736d324e0aad70e307 Reviewed-on: https://review.coreboot.org/17257 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2016-11-07drivers/i2c/tpm/cr50: Increase IRQ timeoutDuncan Laurie
Increase the IRQ timeout to prevent issues if there is a delay in the TPM responding to a command. Split the no-IRQ case out so it doesn't suffer unnecessarily. BUG=chrome-os-partner:59191 TEST=suspend/resume testing on eve board Change-Id: I1ea7859bc7a056a450b2b0ee32153ae43ee8699f Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/17204 Reviewed-by: Furquan Shaikh <furquan@google.com> Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2016-10-26drivers/i2c/wacom_ts: Add support for WCOM touchscreen device driverFurquan Shaikh
BUG=chrome-os-partner:57846 Change-Id: Id6bd91b3fd6420994ad5811d362618b1a38a8afa Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17092 Tested-by: build bot (Jenkins) Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
2016-10-25drivers/i2c/generic: Re-factor SSDT generation codeFurquan Shaikh
1. Export i2c_generic_fill_ssdt to allow other device-specific i2c drivers to share and re-use the same code for generating AML code for SSDT. In order to achieve this, following changes are required: a. Add macro I2C_GENERIC_CONFIG that defines a structure with all generic i2c device-tree properties. This macro should be placed by the using driver at the start of its config structure. b. Accept a callback function to add any device specific information to SSDT. If generic driver is used directly by a device, callback would be NULL. Other devices using a separate i2c driver can provide a callback to add any properties to SSDT. 2. Allow device to provide _CID. BUG=chrome-os-partner:57846 Change-Id: I3a0054e22b81f9d6d407bef417eae5e9edc04ee4 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17089 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
2016-10-25drivers/i2c/generic: Enable support for adding PowerResource for deviceFurquan Shaikh
Add support to allow a device to define PowerResource in its SSDT AML code. PowerResouce ACPI generation expects SoC to define the callbacks for generating AML code for GPIO manipulation. Device requiring PowerResource needs to define following parameters: 1. Reset GPIO - Optional, GPIO to put device into reset or take it out of reset. 2. Reset delay - Delay after reset GPIO is de-asserted (default 0). 3. Enable GPIO - Optional, GPIO to enabled device. 4. Enable delay - Delay after enable GPIO is asserted (default 0). BUG=chrome-os-partner:55988 Change-Id: Ieb2dd95fc1f555f5de66f3dda425172ac5b75dad Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17081 Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Tested-by: build bot (Jenkins)
2016-10-24drivers/i2c/generic: Return correct name for acpi_nameFurquan Shaikh
Return config->name if it is not NULL. BUG=chrome-os-partner:55988 Change-Id: I9ae229949b73de6f991383daae8d962d6cf457a7 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17077 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2016-10-07src/drivers: Remove whitespace after memcpy & memsetElyes HAOUAS
Change-Id: If79eb706b6d44f7c34dfe31a1545f5850870b334 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/16866 Tested-by: build bot (Jenkins) Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Martin Roth <martinroth@google.com>
2016-10-07Gale: Fix the orange color to match the UX docSuresh Rajashekara
UX Doc = go/gale-hw-ui This color wasn't changed earlier as the change wasn't done in the OS also. However, since we cannot change this later in FW (but OS can change anytime), I am making this change after discussing with the UX team. BUG=b:31501528, b:31633562 TEST=Change the device state to 'recovery mode' to observe the new color. BRANCH=none Change-Id: Ia91f14eb77492095cb41a9de0bb9790e72aa4851 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 36a3d8c6eabbc0b23d0a15d5bddc5ed3bdeebe70 Original-Change-Id: I88768b94cf91804a6005e44b1a168e059698ec4b Original-Signed-off-by: Suresh Rajashekara <sureshraj@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/388206 Original-Commit-Ready: Suresh Rajashekara <sureshraj@chromium.org> Original-Tested-by: Suresh Rajashekara <sureshraj@chromium.org> Original-Reviewed-by: Christopher Book <cbook@chromium.org> Original-Reviewed-by: Kan Yan <kyan@google.com> Reviewed-on: https://review.coreboot.org/16767 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-10-06i2c/ww_ring: LED changes as per UX team feedback.Suresh Rajashekara
Colors and patterns as defined by the UX team BUG=b:31501528 TEST=Move the device to different states in FW using rec and dev button and verify the colors BRANCH=None Change-Id: I66d41a54590cd3ce4e5202c7cfa890f462fe195e Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 703559d5dddaeeb7d435d6cadbb2009a1b7a76c8 Original-Change-Id: I95ab1fa59b483396ff1498a28f1ee98ac08d02d7 Original-Signed-off-by: Suresh Rajashekara <sureshraj@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/387258 Original-Commit-Ready: Suresh Rajashekara <sureshraj@chromium.org> Original-Tested-by: Suresh Rajashekara <sureshraj@chromium.org> Original-Reviewed-by: Christopher Book <cbook@chromium.org> Original-Reviewed-by: Kan Yan <kyan@google.com> Reviewed-on: https://review.coreboot.org/16718 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-10-06i2c/ww_ring: Change LED configuration for Gale EVT3Suresh Rajashekara
Gale EVT3 has only one LED controller (earlier we had 2). Remove the support for the second controller and also the corresponding microcode. The color values used are the same as onHub (Arkham to be specific). BUG=b:30890905 TEST=Move the device to different states manually by appropriate actions (like dev mode, rec mode etc) and observe the different colors. BRANCH=None Change-Id: I853035610ea7ea7c8d29c30d2de13c9e2e786b2b Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 593905d2d69daa7482318aa5f5c5cd7cf984043e Original-Change-Id: If8f22abd605faac6f6215ef600041740ce15ea0c Original-Signed-off-by: Suresh Rajashekara <sureshraj@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/370821 Original-Commit-Ready: Suresh Rajashekara <sureshraj@chromium.org> Original-Tested-by: Suresh Rajashekara <sureshraj@chromium.org> Original-Reviewed-by: Kan Yan <kyan@google.com> Reviewed-on: https://review.coreboot.org/16697 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-10-05drivers/i2c/tpm/cr50: Initialize IRQ status handler before probeDuncan Laurie
Move the setup of the IRQ status handler so it will be set up properly before the early probe happens. BUG=chrome-os-partner:53336 Change-Id: I4380af1233d2a252899459635a3cb69ca196088d Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16861 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
2016-10-02Kconfig: Update default hex values to start with 0xMartin Roth
Kconfig hex values don't need to be in quotes, and should start with '0x'. If the default value isn't set this way, Kconfig will add the 0x to the start, and the entry can be added unnecessarily to the defconfig since it's "different" than what was set by the default. A check for this has been added to the Kconfig lint tool. Change-Id: I86f37340682771700011b6285e4b4af41b7e9968 Signed-off-by: Martin Roth <martinroth@google.com> Reviewed-on: https://review.coreboot.org/16834 Tested-by: build bot (Jenkins) Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2016-09-28drivers/i2c/generic: Add config for marking device as probedDuncan Laurie
Add a config option to the generic I2C device driver to indicate to the OS that this device should be probed before being added. This can be used to provide ACPI device instantiations to devices that may not actually exist on the board. For example, if multiple trackpad vendors are supported on the same board they can both be described in ACPI and the OS will probe the address and load the driver only if the device responds to the probe at that address. BUG=chrome-os-partner:57686 Change-Id: I22cffb4b15f25d97dfd37dc58bca315f57bafc59 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16742 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-09-21drivers/i2c/tpm/cr50: Support interrupts for statusDuncan Laurie
Support reading the ACPI GPE status (on x86) to determine when the cr50 is ready to return response data or is done processing written data. If the interrupt is not defined by Kconfig then it will continue to use the safe delay. This was tested with reef hardware and a modified cr50 image that generates interrupts at the intended points. BUG=chrome-os-partner:53336 Change-Id: Ic8f805159650c45382cacac8840450a1f8b4d7a1 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16672 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-09-21drivers/i2c/tpm/cr50: Improve data handling and function namesDuncan Laurie
Unify the function names to be consistent throughout the driver and improve the handling while waiting for data available and data expected flags from the TPM. BUG=chrome-os-partner:53336 Change-Id: Ie2dfb7ede1bcda0e77070df945c47c1428115907 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16668 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-09-21drivers/i2c/tpm/cr50: Clean up locality functionsDuncan Laurie
Clean up the mask and timeout handling in the locality functions that were copied from the original driver. BUG=chrome-os-partner:53336 Change-Id: Ifdcb3be0036b2c02bfbd1bcd326e9519d3726ee0 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16667 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-09-21drivers/i2c/tpm/cr50: Rename i2c read/write functionsDuncan Laurie
Rename the low-level functions from iic_tpm_read/write to cr50_i2c_read/write to better match the driver name, and pass in the tpm_chip structure to the low-level read/write functions as it will be needed in future changes. BUG=chrome-os-partner:53336 Change-Id: I826a7f024f8d137453af86ba920e0a3a734f7349 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16666 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-09-21drivers/i2c/tpm/cr50: Clean up timeoutsDuncan Laurie
Use two different timeouts in the driver. The 2ms timeout is needed to be safe for cr50 to cover the extended timeout that is seen with some commands. The other at 2 seconds which is a TPM spec timeout. BUG=chrome-os-partner:53336 Change-Id: Ia396fc48b8fe6e56e7071db9d74561de02b5b50e Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16665 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-09-21drivers/i2c/tpm/cr50: Reduce max buffer sizeDuncan Laurie
Reduce the static buffer size from the generic default 1260 down to 64 to match the max FIFO size for the cr50 hardware and reduce the footprint of the driver. BUG=chrome-os-partner:53336 Change-Id: I6f9f71d501b60299edad4b16cc553a85391a1866 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16664 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-09-21drivers/i2c/tpm: Split cr50 driver from main driverDuncan Laurie
Originally I thought it would be cleaner to keep this code in one place, but as things continue to diverge it ends up being easier to split this into its own driver. This way the different drivers in coreboot, depthcharge, and the kernel, can all be standalone and if one is changed it is easier to modify the others. This change splits out the cr50 driver and brings along the basic elements from the existing driver with no real change in functionality. The following commits will modify the code to make it consistent so it can all be shared with depthcharge and the linux kernel drivers. BUG=chrome-os-partner:53336 Change-Id: I3b62b680773d23cc5a7d2217b9754c6c28bccfa7 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16663 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-09-21drivers/i2c/tpm: Move common variables to headerDuncan Laurie
Move the common enums and variables to tpm.h so it can be used by multiple drivers. BUG=chrome-os-partner:53336 Change-Id: Ie749f13562be753293448fee2c2d643797bf8049 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16662 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-09-19Revert "drivers/i2c/tpm: Move common variables to header"Duncan Laurie
This reverts commit 64df72e8e2d1c086705325533767ca5e201e842a.
2016-09-19Revert "drivers/i2c/tpm: Split cr50 driver from main driver"Duncan Laurie
This reverts commit c565f9910707b91fcc7a27bab28806e558bb474d.
2016-09-19Revert "drivers/i2c/tpm/cr50: Reduce max buffer size"Duncan Laurie
This reverts commit 97a2a1ece152b6d40a524361721405b77c37959d.
2016-09-19Revert "drivers/i2c/tpm/cr50: Clean up timeouts"Duncan Laurie
This reverts commit 93c778688f0bf2f90334505a3082a2cd4ce1623a.
2016-09-19Revert "drivers/i2c/tpm/cr50: Rename i2c read/write functions"Duncan Laurie
This reverts commit 6f5ceb26b9b3e1455ebbd6192e1d2c832bddc77e.
2016-09-19Revert "drivers/i2c/tpm/cr50: Clean up locality functions"Duncan Laurie
This reverts commit 557e1a729a9ca89e814220b6203b7ac0dc446913.
2016-09-19Revert "drivers/i2c/tpm/cr50: Improve data handling and function names"Duncan Laurie
This reverts commit 1241e7db55aff313e56bf4546d969c11368b08a2.
2016-09-19Revert "drivers/i2c/tpm/cr50: Support interrupts for status"Duncan Laurie
This reverts commit a5e419c51187d24818f056327746a18676fe3a20.
2016-09-19drivers/i2c/tpm/cr50: Support interrupts for statusDuncan Laurie
Support reading the ACPI GPE status (on x86) to determine when the cr50 is ready to return response data or is done processing written data. If the interrupt is not defined by Kconfig then it will continue to use the safe delay. This was tested with reef hardware and a modified cr50 image that generates interrupts at the intended points. BUG=chrome-os-partner:53336 Change-Id: I9f78f520fd089cb4471d8826a8cfecff67398bf8 Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
2016-09-19drivers/i2c/tpm/cr50: Improve data handling and function namesDuncan Laurie
Unify the function names to be consistent throughout the driver and improve the handling while waiting for data available and data expected flags from the TPM. BUG=chrome-os-partner:53336 Change-Id: I7e3912fb8d8c6ad17d1af2d2a7189bf7c0c52c8e Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
2016-09-19drivers/i2c/tpm/cr50: Clean up locality functionsDuncan Laurie
Clean up the mask and timeout handling in the locality functions that were copied from the original driver. BUG=chrome-os-partner:53336 Change-Id: Ifa1445224b475aec38c2ac56e15cb7ba7fcd21ea Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
2016-09-19drivers/i2c/tpm/cr50: Rename i2c read/write functionsDuncan Laurie
Rename the low-level functions from iic_tpm_read/write to cr50_i2c_read/write to better match the driver name, and pass in the tpm_chip structure to the low-level read/write functions as it will be needed in future changes. BUG=chrome-os-partner:53336 Change-Id: Ib4a68ce1b3a83ea7c4bcefb9c6f002f6dd4aac1f Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
2016-09-19drivers/i2c/tpm/cr50: Clean up timeoutsDuncan Laurie
Use two different timeouts in the driver. The 2ms timeout is needed to be safe for cr50 to cover the extended timeout that is seen with some commands. The other at 2 seconds which is a TPM spec timeout. BUG=chrome-os-partner:53336 Change-Id: I77fdd7ea646b8b2fef449f07e3a08bcce174fe8b Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
2016-09-19drivers/i2c/tpm/cr50: Reduce max buffer sizeDuncan Laurie
Reduce the static buffer size from the generic default 1260 down to 64 to match the max FIFO size for the cr50 hardware and reduce the footprint of the driver. BUG=chrome-os-partner:53336 Change-Id: Ia88facca607f3fd5072d0d986323fde075f15855 Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
2016-09-19drivers/i2c/tpm: Split cr50 driver from main driverDuncan Laurie
Originally I thought it would be cleaner to keep this code in one place, but as things continue to diverge it ends up being easier to split this into its own driver. This way the different drivers in coreboot, depthcharge, and the kernel, can all be standalone and if one is changed it is easier to modify the others. This change splits out the cr50 driver and brings along the basic elements from the existing driver with no real change in functionality. The following commits will modify the code to make it consistent so it can all be shared with depthcharge and the linux kernel drivers. BUG=chrome-os-partner:53336 Change-Id: Ia9a65e72519b95f5739e3b7a16b9c2431d64ebe2 Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
2016-09-19drivers/i2c/tpm: Move common variables to headerDuncan Laurie
Move the common enums and variables to tpm.h so it can be used by multiple drivers. BUG=chrome-os-partner:53336 Change-Id: I0febe98620d0ddd4ec6b46cd3073e48c12926266 Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
2016-09-14drivers/i2c/tpm: Clean up handling of command readyDuncan Laurie
The TPM driver was largely ignoring the meaning of the command ready bit in the status register, instead just arbitrarily sending it at the end of every receive transaction. Instead of doing this have the command ready bit be set at the start of a transaction, and only clear it at the end of a transaction if it is still set, in case of failure. Also the cr50 function to wait for status and burst count was not waiting the full 2s that the existing driver does so that value is increased. Also, during the probe routine a delay is inserted after each status register read to ensure the TPM has time to actually start up. Change-Id: I1c66ea9849e6be537c7be06d57258f27c563c1c2 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16591 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
2016-09-08drivers/i2c/tpm: Fix early TPM probeDuncan Laurie
The early TPM probe was done directly in tis.c ignoring the lower layer that provides appropriate access to the chip. Move this into a tpm_vendor_probe() function so it can use iic_tpm_read() with all of the built-in delays and semantics instead of calling i2c_readb() directly from the wrong layer. This fixes early init failures that were seen with the cr50 i2c tpm on the reef mainboard. Change-Id: I9bb3b820d10f6e2ea24c57b90cf0edc813cdc7e0 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16527 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2016-09-06drivers/i2c/tpm: Fix error handling for tis structure not initializedDuncan Laurie
If the TPM completely fails to respond then the vendor structure may not have assigned handlers yet, so catch that case and return error so the boot can continue to recovery mode instead of asserting over and over. Change-Id: If3a11567df89bc73b4d4878bf89d877974044f34 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16416 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2016-09-06drivers/i2c/tpm: Add support for generating ACPI tableDuncan Laurie
Add code to generate an ACPI descriptor for an I2C TPM based on the device as described in devicetree.cb. This currently requires the devicetree to provide the HID, since we don't currently talk to the TPM in ramstage and I didn't want to add yet another init path for it here. This was tested on a reef board to ensure that the device is described properly in the SSDT. Change-Id: I43d7f6192f48e99a4074baa4e52f0a9ee554a250 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16397 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-09-06drivers/i2c/tpm: Add support for cr50 TPMDuncan Laurie
Add support for the cr50 TPM used in apollolake chromebooks. This requires custom handling due to chip limitations, which may be revisited but are needed to get things working today. - timeouts need to be longer - must use the older style write+wait+read read protocol - all 4 bytes of status register must be read at once - same limitation applies when reading burst count from status reg - burst count max is 63 bytes, and burst count behaves slightly differently than other I2C TPMs - TPM expects the host to drain the full burst count (63 bytes) from the FIFO on a read Luckily the existing driver provides most abstraction needed to make this work seamlessly. To maximize code re-use the support for cr50 is added directly instead of as a separate driver and the style is kept similar to the rest of the driver code. This was tested with the cr50 TPM on a reef board with vboot use of TPM for secdata storage and factory initialization. Change-Id: I9b0bc282e41e779da8bf9184be0a11649735a101 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16396 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
2016-09-06drivers/i2c/tpm: Allow sleep durations to be set by the chipDuncan Laurie
Allow the sleep durations used by the driver to be set by the specific chip so they can be tuned appropriately. Since we need to read the chip id to know the values use very conservative defaults for the first command and then set it to the current values by default. Change-Id: Ic64159328b18a1471eb06fa8b52b589eec1e1ca2 Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/16395 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
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