Declare the mainboard attached devices in the devicetree and enable
the provided device drivers by default to generate the ACPI objects
for these devices. Then remove the static ACPI objects from the DSDT
in mainboard.asl.
This was verified by comparing the generated ACPI code in the SSDT
to what was in mainboard.asl and ensuring the contents are
functionally equivalent.
Change-Id: I4725bbe2d47178568e3024fe3bb48cc80ff861c3
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/15314
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Rewrite inline assembly for ARMv7+ to correctly annotate inputs and
outputs. On ARM GCC 6.1.1, this causes assembly output to change from
the incorrect
@ r0 is allocated to hold dst and x0
@ r1 is allocated to hold src and x1
ldr r0, [r1] @ clobbers dst!
ldr r1, [r1, #4]
str r0, [r0]
str r1, [r0, #4]
to the correct
@ r0 is allocated to hold dst
@ r1 is allocated to hold src and x1
@ r3 is allocated to hold x0
ldr r3, [r1]
ldr r1, [r1, #4]
str r3, [r0]
str r1, [r0, #4]
Also modify checkpatch.pl to ignore spaces before opening brackets when
used in inline assembly.
Change-Id: I255995f5e0a7b1a95375258755a93972c51d79b8
Signed-off-by: Benjamin Barenblat <bbaren@google.com>
Reviewed-on: https://review.coreboot.org/15216
Tested-by: build bot (Jenkins)
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Correct the definitions for 16b and 32b SO-DIMM modules.
Regarding JEDEC Standard No. 21-C
Annex K: Serial Presence Detect for DDR3 SDRAM Modules (2014),
the hex values used for 16b-SO-DIMM is 0x0c
and for 32b-SO-DIMM module type is 0x0d
Change-Id: I9210ac3409a4aaf55a0f6411d5960cfdca05068d
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/15262
Tested-by: build bot (Jenkins)
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Broken with commit:
2585209 mb/samsung/lumpy/romstage: read SPD data of removable DIMM
The blob can pick SPDs from the addresses defined in pei_data
and we do only define read_spd() with USE_NATIVE_RAMINIT.
Change-Id: Ibd6d7a4a53fa808b476d3060872cb10d3dfce534
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/15329
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Broken with commit:
5c10abe nb/intel/sandybridge: increase MMCONF_BASE_ADDRESS
Available sandybridge/systemagent-r6.bin has MMCONF hard-coded
at some places and samsung/lumpy fails at boot here:
CBFS: Locating 'mrc.bin'
CBFS: Found @ offset 9fec0 size 2fc94
System Agent: Starting up...
System Agent: Initializing
These are the last lines as captured over USB debug.
Change-Id: I441847f0e71a5e1be9c8ef6a04a81eb7bdd8a6d9
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/15328
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1. Mark 256KiB at end of BIOS region as unusable BIOS region is
memory-mapped just below 4GiB, however last 256KiB is unusable. Mark it
accordingly in fmd file.
2. Use up holes in RW region for RW_A and RW_B.
3. Fill up holes in RO with UNUSED regions.
BUG=chrome-os-partner:54672
Change-Id: I5facc566bb70d950522e12228b0631ddf00ac63d
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15313
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
for per cs training, there should be more cycles to switch delay line.
so increase W2W_DIFFCS_DLY_F0 value from 0x1 to 0x5.
BRANCH=none
BUG=chrome-os-partner:54144
TEST=run "stressapptest -M 1024 -s 1000" and pass
Change-Id: I11720b7c6f009789b88ca26fc5da88597ed1622e
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 9de93beae09174d50a31d2df655529f71628f77c
Original-Change-Id: Ide23fff04fd63fb0afc538b610b7685756f79f8d
Original-Signed-off-by: Lin Huang <hl@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/352953
Original-Commit-Ready: Vadim Bendebury <vbendeb@chromium.org>
Original-Tested-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-by: Douglas Anderson <dianders@chromium.org>
Original-Reviewed-by: Derek Basehore <dbasehore@chromium.org>
Reviewed-on: https://review.coreboot.org/15307
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
After write leveling for all ranks, check the
PHY_CLK_WRDQS_SLAVE_DELAY result, if the two ranks in one slice both
meet (0x200-PHY_CLK_WRDQS_SLAVE_DELAY < 0x20) or
(0x200-PHY_CLK_WRDQS_SLAVE > 0x1E0), enable PHY_WRLVL_EARLY_FORCE_ZERO
for this slice, and trigger write leveling again.
BRANCH=none
BUG=chrome-os-partner:54144
TEST=run "stressapptest -M 1024 -s 1000" and pass
Change-Id: I1a0e4e888eb62b5fae5b5e5437a385e8660a246d
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 717cbac97b2045f2934e99859ce405aa3637b1c4
Original-Change-Id: Ic0d7c59404e870a7108ed64bbf3215fcc2d0973e
Original-Signed-off-by: Lin Huang <hl@rock-chips.com>
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/351825
Reviewed-on: https://review.coreboot.org/15300
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
To fully define TPM attachment to a SPI interface both bus and CS
(chip select) settings are required. Add the missing CS configuration
option.
BRANCH=none
BUG=chrome-os-partner:50645
TEST=with the rest of the patches applied it is possible to compile in
and run TPM2 SPI driver.
Change-Id: If297df8e5b9526f156ed1414eb9db317d6af5b33
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/353913
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15299
Tested-by: build bot (Jenkins)
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This introduces a SPI TPM driver compliant with the TCG issued "TPM
Profile (PTP) Specification Revision 00.43" which can be found by
googling its title.
The driver implements both the hardware flow control protocol and the
TPM state machine.
The hardware flow control allows to map SPI based TPM devices to the
LPC address space on x86 platforms, on all other platforms it needs to
be implemented in the driver software.
The tis layer is somewhat superficial, it might have to be expanded
later.
A lot more implementation details can be found in the code comments.
Also, it is worth mentioning that this is not a complete version of
the driver: its robustness needs to be improved, delay loops need to
be bound, error conditions need to propagate up the call stack.
BRANCH=none
BUG=chrome-os-partner:52132, chrome-os-partner:50645, chrome-os-partner:54141
TEST=with the rest of the patches applied coreboot is able complete
Chrome OS factory initialization of the TPM2 device.
Change-Id: I967bc5c689f6e6f345755f08cb088ad37abd5d1c
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 5611c6f7d7fe6d37da668f337f0e70263913d63e
Original-Change-Id: I17d732e66bd231c2289ec289994dd819c6276855
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/350124
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15298
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
Tested-by: build bot (Jenkins)
The CENTER LOGIC should always be 0.9V and can not be adjusted,
so use duty_ns = 2860 to correct CENTER LOGIC to 0.9V. And now
DDR seems to run stable at 800MHz on the gru board.
BRANCH=none
BUG=chrome-os-partner:54144, chrome-os-partner:53208
TEST=run "stressapptest -M 1024 -s 1000" and pass
Change-Id: Ia900e248c10ddd0ab630446a324cc0446c0fa49b
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: f4fb1cefb59ac4099cef8b32a68ed9222e708478
Original-Change-Id: I2238da6c17908d09bc284b321d796901317ed9ef
Original-Signed-off-by: Lin Huang <hl@rock-chips.com>
Original-Signed-off-by: Douglas Anderson <dianders@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/352772
Reviewed-on: https://review.coreboot.org/15297
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
Set up the pins and initialize the driver.
BRANCH=none
BUG=chrome-os-partner:50645, chrome-os-partner:51537
TEST=with the rest of the patches applied it is possible to
communicate with the cr50.
Change-Id: I9fc1cb84ccababa6f58b2d5beec4572dc1d79da1
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 6100471db2a00fd411afc05d621429b8f8a2f81d
Original-Change-Id: I0ccd8777288e35870658268813c9202dd850c70d
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/349852
Original-Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-on: https://review.coreboot.org/15296
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
This register is described in the TRM in section called
GRF_GPIO3D_IOMUX. Added definitions allow to configure the SPI0
interface.
BRANCH=none
BUG=chrome-os-partner:50645, chrome-os-partner:51537
TEST=with the rest of the patches applied it is possible to
communicate over SPI0
Change-Id: Ieee3fcae6095020042b02673c7d863f398ed2eb4
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 8f155e3b47c9f44ad4e5a2513916572e7d5ec0ab
Original-Change-Id: Iea92971b0520dc4549cd0fd263dcb2098f80f6d6
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/349851
Original-Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-on: https://review.coreboot.org/15295
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
Until now it was assumed that all TPM devices were of the same type
(TCG 1.2 spec compliant) and x86 based boards had LPC connected TPMs
and all other boards had I2C connected TPMs.
With the advent of TPM2 specification there is a need to be able to
configure different combinations of TPM types (TPM or TPM2) and
interfaces (LPC, I2C and SPI).
This patch allows to do it. Picking Chrome OS still assumes that the
board has a TPM device, but adding MAINBOARD_HAS_TPM2 to the board's
Kconfig will trigger including of TPM2 instead.
MAINBOARD_HAS_LPC_TPM forces the interface to be set to LPC, adding
SPI_TPM to the board config switches interface choice to SPI, and if
neither of the two is defined, the interface is assumed to be I2C.
BRANCH=none
BUG=chrome-os-partner:50645
TEST=verified that none of the generated board configurations change
as a result of this patch. With the rest of the stack in place it
is possible to configure different combinations of TPM types and
interfaces for ARM and x86 boards.
Change-Id: I24f2e3ee63636566bf2a867c51ed80a622672f07
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 5a25c1070560cd2734519f87dfbf401c135088d1
Original-Change-Id: I659e9301a4a4fe065ca6537ef1fa824a08d36321
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/349850
Original-Reviewed-by: Martin Roth <martinroth@chromium.org>
Reviewed-on: https://review.coreboot.org/15294
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
get_bios_size returns the value of bios_size. Use this function to
calculate bios_size for caching in bootblock.
BUG=chrome-os-partner:54563
Change-Id: I2e592b1c52138bd4623ad2acd05c744224a8e50b
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15292
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
This variable name was changed in chip.h but not the consumer
and it was submitted before it was caught.
Change-Id: I7c492b588b2fd854a9eeac36029a46da324a7b1b
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/15109
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Some of the support functions will be built for romstage
once HIGH_MEMORY_SAVE is removed.
Change-Id: I43ed9067cf6b2152a354088c1dcb02d374eb6efe
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/15242
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This file is pulled for x86 bootblock builds using ROMCC,
which would choke on struct bus.
Change-Id: Ie3566cd5cfc4b4e0e910b47785449de81a07b9ef
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/15274
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
No need to make low memory backup unless we are on
S3 resume path.
Hide those details from ACPI.
Change-Id: Ic08b6d70c7895b094afdb3c77e020ff37ad632a1
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/15241
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Without RELOCATABLE_RAMSTAGE have WB cache large enough
to cover the greatest ramstage needs, as there is no benefit
of trying to accurately match the actual need. Choose
this to be bottom 16MiB.
With RELOCATABLE_RAMSTAGE write-back cache of low ram is
only useful for bottom 1MiB of RAM as a small part of this gets used
during SMP initialisation before proper MTRR setup.
Change-Id: Icd5f8461f81ed0e671130f1142641a48d1304f30
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/15249
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
At the higher speeds stressapptest shows memory errors. We don't want
to track down random problems due to simple memory corruption, so slow
memory back down to 300 MHz until someone figures out how to make it
faster without sacrificing reliability.
BRANCH=None
BUG=chrome-os-partner:54144
TEST=stressapptest -M 1024 -s 240
Change-Id: I2417f93f65b1491a028a63ce563ed7dd7831becc
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id:
Original-Change-Id: I02182b25e677e27e8541445938f9da9ae9553fa6
Original-Signed-off-by: Douglas Anderson <dianders@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/350480
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/15120
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
To support gpio power off SOC, we need to pass the power off
gpio parameter to BL31. Gru reuse tsadc overtemp pin as power
off gpio, so need to iomux to gpio function when use gpio power
off function, either in bl31 or depthcharge.
BRANCH=None
BUG=chrome-os-partner:53448
TEST=Build gru
Change-Id: Ibfe64042f39f6df1b87536b50fe432859bf74426
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id:
Original-Change-Id: Ie7a1bbea4a12753f0abac7a9142f2e032686ce31
Original-Signed-off-by: Lin Huang <hl@rock-chips.com>
Original-Signed-off-by: Douglas Anderson <dianders@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/349703
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/15119
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
To support gpio reset SOC, we need to pass the reset gpio
parameter to BL31. Note: request BL31 have supported this
function.
BRANCH=None
BUG=chrome-os-partner:51924
TEST=Build gru
Change-Id: I182cff11ce6f5dc3354db0dc053c128b813acf9f
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id:
Original-Change-Id: I8283596565d552b1f3db31c28621a1601c226999
Original-Signed-off-by: Lin Huang <hl@rock-chips.com>
Original-Signed-off-by: Douglas Anderson <dianders@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/349702
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/15118
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)
sometimes we need gpio number, so add this macro so we
can get the gpio number if we need.
BRANCH=None
BUG=chrome-os-partner:51924
TEST=Build gru
Change-Id: I0c8c6cc0643a66e9ae1f21b02c7364c641b9805d
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id:
Original-Change-Id: I98e8cf15543179904295a86e9f720c2d7c8b443a
Original-Signed-off-by: Lin Huang <hl@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/349701
Original-Commit-Ready: Douglas Anderson <dianders@chromium.org>
Original-Tested-by: Douglas Anderson <dianders@chromium.org>
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/15117
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
Disabling ISH causes resets in FSP which leads to hang. This should be
fixed in a later stepping. Until then keep ISH enabled.
BUG=chrome-os-partner:54033
Change-Id: Id9cb276eed8d027ab6d2e81a5ec962bc730c1ff5
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15142
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
Instead of hard-coding the BIOS region start and end addresses, read
BIOS_BFPREG to determine the base and limit for the mapped BIOS
region.
BUG=chrome-os-partner:54563
Change-Id: Iddd3d4cc945f09e8f147e293bb9144471a6a220d
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15269
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
This makes it clearer that the read/write operations are being performed
on the host controllers registers.
Change-Id: Id63d778a4a03c461d97e535c34b85ada3ae469de
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15281
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This allows initialization of runtime region devices and xlate region
devices where all parameters cannot be statically determined.
BUG=chrome-os-partner:54563
Change-Id: Ia6e1b695fed3bbfa08598d1593e650fc1465d41f
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15267
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This makes the name consistent with other region device init macros.
Change-Id: I248894ba6c85326b615dcb71e8f498bc8be50911
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15277
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
spi_read_status reads the status register using hardware sequencing and
returns 0 on success and -1 on error. Use spi_read_status to return
appropriate value for get_sw_write_protect.
BUG=chrome-os-partner:54283
Change-Id: I7650b5c0ab05a8429c2b291f00d4672446d86e03
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15266
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
spi_init should be run early enough in ramstage so that any init
calls (e.g. mainboard_ec_init) that write on flash have right
permissions set.
Change-Id: I9cd3dc723387757951acd40449d4a41986836d2a
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15235
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Bootblock:
- Temporary BAR needs to be assigned for SPI device until PCI
enumeration is done by ramstage which allocates a new BAR.
- Call spi_init to allow bootblock/verstage to write/erase on flash.
Ramstage:
- spi_init needs to run in ramstage to allow write protect to be
disabled for eventlog and NVRAM updates. This needs to be done pretty
early so that any init calls(e.g. mainboard_ec_init) writing to flash
work properly.
Verified with this change that there are no more flash write/erase
errors for ELOG/NVRAM.
BUG=chrome-os-partner:54283
Change-Id: Iff840e055548485e6521889fcf264a10fb5d9491
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15209
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Andrey Petrov <andrey.petrov@intel.com>
Tested-by: build bot (Jenkins)
This I2C controller has separate registers for different speeds to set
specific timing for SCL high and low times, and then a single register
to configure the SDA hold time.
For the most part these values can be generated based on the freq of
the controller clock, which is SOC-specific. The existing driver was
generating SCL HCNT/LCNT values, but not the SDA hold time so that is
added.
Additionally a board may need custom values as the exact timing can
depend on trace lengths and the number of devices on the I2C bus. This
is a two-part customizaton, the first is to set the values for desired
speed for use within firmware, and the second is to provide those
values in ACPI for the OS driver to consume.
And finally, recent upstream changes to the designware i2c driver in
the Linux kernel now support passing custom timing values for high
speed and fast-plus speed, so these are now supported as well.
Since these custom speed configs will come from devicetree a macro is
added to simplify the description:
register "i2c[4].speed_config" = "{
LPSS_I2C_SPEED_CONFIG(STANDARD, 432, 507, 30),
LPSS_I2C_SPEED_CONFIG(FAST, 72, 160, 30),
LPSS_I2C_SPEED_CONFIG(FAST_PLUS, 52, 120, 30),
LPSS_I2C_SPEED_CONFIG(HIGH, 38, 90, 30),
}"
Which will result in the following speed config in \_SB.PCI0.I2C4:
Name (SSCN, Package () { 432, 507, 30 })
Name (FMCN, Package () { 72, 160, 30 })
Name (FPCN, Package () { 52, 120, 30 })
Name (HSCN, Package () { 38, 90, 30 })
Change-Id: I18964426bb83fad0c956ad43a36ed9e04f3a66b5
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/15163
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Duncan Laurie