ddr: altera: Clean up sdr_*_phase() part 3

Fix the arguments passed to these functions. The bit_chk is
overriden by rw_mgr_mem_calibrate_read_test_all_ranks() which
is invoked by all three sdr_*_pha

ddr: altera: Clean up sdr_*_phase() part 3

Fix the arguments passed to these functions. The bit_chk is
overriden by rw_mgr_mem_calibrate_read_test_all_ranks() which
is invoked by all three sdr_*_phase() functions, so just make
this into local variable.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Clean up sdr_*_phase() part 2

Fix the arguments passed to these functions. The grp argument
does not have to be passed via reference, it's never modified
within either of those function

ddr: altera: Clean up sdr_*_phase() part 2

Fix the arguments passed to these functions. The grp argument
does not have to be passed via reference, it's never modified
within either of those functions, so make it into a value.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Clean up sdr_*_phase() part 1

Rename find_working_phase() to sdr_working_phase() for the
sake of consistency.

Signed-off-by: Marek Vasut <marex@denx.de>

ddr: altera: Clean up sdr_find_window_centre() part 3

Reorder the end of the function a little by moving the conditional
debug output around a little. Rename the function from _centre() to
_center()

ddr: altera: Clean up sdr_find_window_centre() part 3

Reorder the end of the function a little by moving the conditional
debug output around a little. Rename the function from _centre() to
_center(). Document the function in kerneldoc.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Clean up sdr_find_window_centre() part 2

This function is a treasure trove of ad-hoc iterative
implementations of mathematical functions. Replace all
of those with their non-iterative c

ddr: altera: Clean up sdr_find_window_centre() part 2

This function is a treasure trove of ad-hoc iterative
implementations of mathematical functions. Replace all
of those with their non-iterative counterpart.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Clean up sdr_find_window_centre() part 1

Clean up the arguments of this function. Most of the pointers
passed into the function are either not needed at all, or can
be passed as value i

ddr: altera: Clean up sdr_find_window_centre() part 1

Clean up the arguments of this function. Most of the pointers
passed into the function are either not needed at all, or can
be passed as value instead of reference. Also fix the broken
multiline debug strings. No functional change.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase_sweep_dq_in_delay() part 4

This function is only invoked from rw_mgr_mem_calibrate_dqs_enable_calibration()
and at this point, it i

ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase_sweep_dq_in_delay() part 4

This function is only invoked from rw_mgr_mem_calibrate_dqs_enable_calibration()
and at this point, it is just one level of indirection, so wrap the
rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase_sweep_dq_in_delay() into
rw_mgr_mem_calibrate_dqs_enable_calibration() to get rid of the level
of indirection.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase_sweep_dq_in_delay() part 3

Replace at least one of the loops in this function with call of a
standard function call instead of the

ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase_sweep_dq_in_delay() part 3

Replace at least one of the loops in this function with call of a
standard function call instead of the ad-hoc implementation. The
other one cannot be replaced, since the delay is incremented for
each group.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase_sweep_dq_in_delay() part 2

The read_group and write_group params have the same value for all (one)
invocations of this function, ju

ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase_sweep_dq_in_delay() part 2

The read_group and write_group params have the same value for all (one)
invocations of this function, just merge them into a single param.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase_sweep_dq_in_delay() part 1

Start cleaning up this function. In the first part, just fix
the incorrectly broken debug strings and fi

ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase_sweep_dq_in_delay() part 1

Start cleaning up this function. In the first part, just fix
the incorrectly broken debug strings and fix return value to
respect the common convention.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Clean up rw_mgr_mem_calibrate_read_test_patterns()

Rework this function such that the code is more readable. Zap
unused parameter "num_tries" while at it. Also wrap parameter
"bit_chk"

ddr: altera: Clean up rw_mgr_mem_calibrate_read_test_patterns()

Rework this function such that the code is more readable. Zap
unused parameter "num_tries" while at it. Also wrap parameter
"bit_chk" into this function as it's value is not used outside.
Finally, fix the return value from this function to match the
common expectation, where 0 means success.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Zap rw_mgr_mem_calibrate_read_test_patterns_all_ranks()

This function is called from one single place and it's sole purpose
is to call one single function with slightly modified argumen

ddr: altera: Zap rw_mgr_mem_calibrate_read_test_patterns_all_ranks()

This function is called from one single place and it's sole purpose
is to call one single function with slightly modified arguments.
Zap this function to skip this useless intermediate step.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Minor rw_mgr_mem_calibrate_read_load_patterns() cleanup

Just do an easy data type cleanup of this function, no functional change.

Signed-off-by: Marek Vasut <marex@denx.de>

ddr: altera: Extract Centering DQ/DQS from rw_mgr_mem_calibrate_vfifo()

Just extract this piece of functionality into separate function
to make the code better separated. This matches the division i

ddr: altera: Extract Centering DQ/DQS from rw_mgr_mem_calibrate_vfifo()

Just extract this piece of functionality into separate function
to make the code better separated. This matches the division in
Altera documentation, Altera EMI_RM 2015.05.04 , section 1, the
UniPHY Calibration Stages.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Extract DQS enable calibration from rw_mgr_mem_calibrate_vfifo()

Just extract this piece of functionality into separate function
to make the code better separated. This matches the divi

ddr: altera: Extract DQS enable calibration from rw_mgr_mem_calibrate_vfifo()

Just extract this piece of functionality into separate function
to make the code better separated. This matches the division in
Altera documentation, Altera EMI_RM 2015.05.04 , section 1, the
UniPHY Calibration Stages.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Extract guaranteed write from rw_mgr_mem_calibrate_vfifo()

Just extract this piece of functionality into separate function
to make the code better separated. This matches the division i

ddr: altera: Extract guaranteed write from rw_mgr_mem_calibrate_vfifo()

Just extract this piece of functionality into separate function
to make the code better separated. This matches the division in
Altera documentation, Altera EMI_RM 2015.05.04 , section 1, the
UniPHY Calibration Stages.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 7

Mildly reorder the function so that the reg_file_set*() calls are
in the same place. No functional change.

Signed-off-by: Marek Vas

ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 7

Mildly reorder the function so that the reg_file_set*() calls are
in the same place. No functional change.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 6

This is kind of microseries-within-series indent cleanup.
It is clear that the read_group and write_group variables
have the same va

ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 6

This is kind of microseries-within-series indent cleanup.
It is clear that the read_group and write_group variables
have the same value, to just make them into one variable
called rw_group. While doing this, constify the variables
as they are constant.

It is likely that this patch has checkpatch warnings, but
for the sake of not breaking the code, these are ignored.

No functional change.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 5

This is kind of microseries-within-series indent cleanup.
This patch fixes the broken formatting strings in debug_cond()
invocations

ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 5

This is kind of microseries-within-series indent cleanup.
This patch fixes the broken formatting strings in debug_cond()
invocations.

It is likely that this patch has checkpatch warnings, but
for the sake of not breaking the code, these are ignored.

No functional change.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 4

This is kind of microseries-within-series indent cleanup.
This patch cleans up the handling of grp_calibrated such
that the variable

ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 4

This is kind of microseries-within-series indent cleanup.
This patch cleans up the handling of grp_calibrated such
that the variable isn't used all over the place, but just
very localy. This allows trimming down the indent issues.

It is likely that this patch has checkpatch warnings, but
for the sake of not breaking the code, these are ignored.

No functional change.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 3

This is kind of microseries-within-series indent cleanup.
This patch just tweaks the indentation so it is visible
what to do with th

ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 3

This is kind of microseries-within-series indent cleanup.
This patch just tweaks the indentation so it is visible
what to do with the grp_calibrated variable.

It is likely that this patch has checkpatch warnings, but
for the sake of not breaking the code, these are ignored.

No functional change.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 2

This is kind of microseries-within-series indent cleanup.
This patch just tweaks the indentation so it is visible
what is supposed t

ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 2

This is kind of microseries-within-series indent cleanup.
This patch just tweaks the indentation so it is visible
what is supposed to go where.

It is likely that this patch has checkpatch warnings, but
for the sake of not breaking the code, these are ignored.

No functional change.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 1

This patch just adds an expanded documentation header to the
aforementioned function. This is needed to make it easier to
match the

ddr: altera: Internal rw_mgr_mem_calibrate_vfifo() cleanup part 1

This patch just adds an expanded documentation header to the
aforementioned function. This is needed to make it easier to
match the purpose of this function with the documentation.

No functional change.

Signed-off-by: Marek Vasut <marex@denx.de>

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ddr: altera: Minor clean up of rw_mgr_mem_initialize()

Add kerneldoc and do a minor comment cleanup. No functional change.

Signed-off-by: Marek Vasut <marex@denx.de>

ddr: altera: Internal mem_calibrate() cleanup part 6

Add kerneldoc to this function.

Signed-off-by: Marek Vasut <marex@denx.de>