Marek Vasut [Sun, 2 Aug 2015 17:26:55 +0000 (19:26 +0200)]
ddr: altera: sequencer: Pluck out misc macros from code
Actually convert the sequencer code to use socfpga_sdram_misc_config
instead of the various macros. This is just an sed exercise here, no
manual coding needed.
This patch actually removes the need to include any board-specific
files in sequencer.c , so sequencer.c namespace is now no longer
poluted by QTS-generated macros.
Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>
This is another macro used to obfuscate the real code. The
T(INIT|RESET)_CNTR._VAL is always defined, so this indirection
is unnecessary. Get rid of this.
Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Introduce structure socfpga_sdram_misc_config to wrap the remaining
misc configuration values in board file. Again, introduce a function,
socfpga_get_sdram_misc_config(), which returns this the structure. This
is almost the final step toward wrapping the nasty QTS generated macros
in board files and reducing the pollution of the namespace.
Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Marek Vasut [Sun, 2 Aug 2015 17:10:58 +0000 (19:10 +0200)]
ddr: altera: sequencer: Pluck out IO_* macros from code
Actually convert the sequencer code to use socfpga_sdram_io_config
instead of the IO_* macros. This is just an sed excercise here, no
manual coding needed.
Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Marek Vasut [Sun, 2 Aug 2015 17:00:23 +0000 (19:00 +0200)]
ddr: altera: sequencer: Wrap IO_* macros
Introduce structure socfpga_sdram_io_config to wrap the IO configuration
values in board file. Introduce socfpga_get_sdram_io_config() function,
which returns this the structure. This is another step toward wrapping
the nasty QTS generated macros in board files and reducing the pollution
of the namespace.
Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Marek Vasut [Sun, 2 Aug 2015 16:44:06 +0000 (18:44 +0200)]
ddr: altera: sequencer: Pluck out RW_MGR_* macros from code
Actually convert the sequencer code to use socfpga_sdram_rw_mgr_config
instead of the RW_MGR_* macros. This is just an sed exercise here, no
manual coding needed.
Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Marek Vasut [Sun, 2 Aug 2015 16:12:08 +0000 (18:12 +0200)]
ddr: altera: sequencer: Wrap RW_MGR_* macros
Introduce structure socfpga_sdram_rw_mgr_config to wrap the RW manager
configuration values in board file. Introduce a complementary function,
socfpga_get_sdram_rwmgr_config(), which returns this the structure.
This is another step toward wrapping the nasty QTS generated macros
in board files and reducing the pollution of the namespace.
Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Marek Vasut [Sun, 2 Aug 2015 15:15:19 +0000 (17:15 +0200)]
ddr: altera: sequencer: Wrap ac_rom_init and inst_rom_init
Introduce two wrapper functions, socfpga_get_seq_ac_init() and
socfpga_get_seq_inst_init() to avoid direct inclusion of the
sequencer_auto_ac_init.h and sequencer_auto_inst_init.h QTS
generated files. This reduces namespace pollution again.
Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Marek Vasut [Sat, 1 Aug 2015 21:12:11 +0000 (23:12 +0200)]
ddr: altera: sdram: Make sdram_start and sdram_end into u32
Originally, both sdram_start and sdram_end were 64b values. The
sdram_start had no reason for being so, since our address space
is only 32b, so switching sdram_start to u32 is simple.
The sdram_end is a bit more complex, since it can actually be
set to (1 << 32) if someone really wanted to use an SoCFPGA with
4 GiB of DRAM and fixed the code around a little. But, the code
handling the protection rules internally decrements the sdram_end
variable anyway. Thus, instead of calling the code and passing in
the address of the SDRAM end, pass in the address already decremented
by one. This lets the sdram_end be 32b as well.
Marek Vasut [Sat, 1 Aug 2015 20:26:11 +0000 (22:26 +0200)]
ddr: altera: sdram: Clean up sdram_write_verify()
Clean the function up so that it's obvious what it is doing,
fix the formating strings in debug outputs, add kerneldoc.
Make the function return proper errno-compliant return values
and propagate this change throughout sdram.c
Marek Vasut [Sat, 1 Aug 2015 19:47:16 +0000 (21:47 +0200)]
ddr: altera: sdram: Clean up sdram_calculate_size() part 2
Clean up coding style, mostly clean up comments, add kerneldoc.
Also, zap assignment of the "cs" variable, which is outright
dead code, so just remove it.
Marek Vasut [Sat, 1 Aug 2015 19:44:00 +0000 (21:44 +0200)]
ddr: altera: sdram: Clean up sdram_calculate_size() part 1
Pluck out all of the CONFIG_HPS_SDR_CTRLCFG_* macros. This change
makes sdram.c completely clear of these macros and allows removing
of the ugly include of sdram.h . The namespace is now a much nicer
place!
Introduce socfpga_sdram_get_config() function implement in a board file,
which returns the socfpga_sdram_config structure. This is the last step
in cleaning up the socfpga_mmr_init_full(), but not the last step which
allows removing the inclusion of sdram.h from drivers/ddr/altera/sdram.c
thus far.
Marek Vasut [Sat, 1 Aug 2015 19:24:31 +0000 (21:24 +0200)]
ddr: altera: sdram: Clean up sdram_mmr_init_full() part 5
Rework remaining two register setting functions such that they only
return the final register value. Move the register setting into the
block of register I/O in sdram_mmr_init_full().
Marek Vasut [Sat, 1 Aug 2015 19:21:21 +0000 (21:21 +0200)]
ddr: altera: sdram: Clean up sdram_mmr_init_full() part 4
Merge sdr_set_*() functions which are just setting registers among
the sea of register setting in sdram_mmr_init_full(). There is no
need to keep them separate this way, there is nothing special about
them.
Marek Vasut [Sat, 1 Aug 2015 18:58:44 +0000 (20:58 +0200)]
ddr: altera: sdram: Clean up sdram_mmr_init_full() part 2
Suck out all the CONFIG_HPS_SDR_CTRLCFG_* from sdram_mmr_init_full()
into the socfpga_sdram_config structure. There is still one ugly
macro left behind, but this will be taken care of in subsequent patch.
Introduce this seemingly massive structure, which holds required values
of all the registers of the SDRAM controller. The idea here is to avoid
including the sdram.h header file, which is full of ad-hoc macros that
polute the global namespace. Once the cleanup of sdram.c would be complete
and all registers would be loaded from this new socfpga_sdram_config, a
board file will only pass this structure into the sdram.c . This will
hide all the horrors generated by QTS in the board directory.
Marek Vasut [Sat, 1 Aug 2015 17:45:24 +0000 (19:45 +0200)]
ddr: altera: sdram: Clean up set_sdr_dram_timing*()
Get rid of the constant clrsetbits_le32(), instead prepare the whole
content of the register once and write it at the end of the function.
Merge set_sdr_dram_timing{1,2,3,4,lowpwr}() into single function
set_sdr_dram_timing() , since there's no point in keeping all this
stuff separate anymore.
Marek Vasut [Sat, 1 Aug 2015 17:33:40 +0000 (19:33 +0200)]
ddr: altera: sdram: Clean up set_sdr_ctrlcfg()
Get rid of the constant clrsetbits_le32(), instead prepare the whole
content of the register once and write it at the end of the function.
The big plan here is to remove all the CONFIG_HPS_SDR_ macros, hide
them in QTS compatibility layer in board implementation and pass only
a small structure into the driver.
Marek Vasut [Sat, 1 Aug 2015 17:20:19 +0000 (19:20 +0200)]
ddr: altera: sdram: Clean up compute_errata_rows() part 2
Remove all parameters of this function, since they are only constants
passed in from another function, so make them local. Also, rename the
function to get_errata_rows() as this is closer to what it does.
Marek Vasut [Mon, 3 Aug 2015 16:31:51 +0000 (18:31 +0200)]
arm: socfpga: Add temporary workaround for missing SD/MMC patches
Add a small workaround into the platform code which forces the SDMMC
into 8-bit mode (the default configuration for all socfpga platforms)
to work around breakage caused by missing patches in mainline which
switch the probing of SD/MMC to OF instead of static configuraiton.
The patches will hit mainline after the SPL series, so to avoid build
issues, add this small temporary workaround.
Marek Vasut [Sat, 18 Jul 2015 03:58:44 +0000 (05:58 +0200)]
ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_end()
This function is implementing the DDR calibration Stage 3 as
described in Altera EMI_RM 2015.05.04 . The main body of this
function is almost identical to Stage 1.3 (DQ/DQS centering)
for all but two flags -- use_read_test and update_fom. Convert
this function to call rw_mgr_mem_calibrate_dq_dqs_centering()
with the correct flags set to trim down the code duplication.
Moreover, reorder the remnants in the function a little and
convert the function to return either 0 or -EIO in case of
success and failure respectively, to match the common return
value convention.
Marek Vasut [Sat, 18 Jul 2015 18:44:28 +0000 (20:44 +0200)]
ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_center() part 10
Fix the return value of the function to match common convention
where 0 means success and negative means error. Fix the return
values in case of an error to use errno.h codes.
Marek Vasut [Sat, 18 Jul 2015 18:42:27 +0000 (20:42 +0200)]
ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_center() part 9
The read_group and write_group arguments are the same in all
cases when this function is invoked, just merge them into one
rw_group argument. Also, clean up the function argument data
types and constify them.
Marek Vasut [Sat, 18 Jul 2015 18:34:00 +0000 (20:34 +0200)]
ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_center() part 8
The search_stop_check() always resets the bit_chk to a new value,
so bit_chk will never survive between search_left_edge() and
search_right_edge() invocation. There is thus no need to pass
it into these functions, so make bit_chk local to them.
Marek Vasut [Sat, 18 Jul 2015 06:01:45 +0000 (08:01 +0200)]
ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_center() part 4
First of all, don't break strings in the debug_cond() calls across
multiple lines. Next, zap a couple of really odd casts in the code.
Finally, make i into a signed variable, so it is possible to avoid
constructs of the form:
for (i = FOO;; i--) { <code>; if (i == 0) break; }.
Marek Vasut [Mon, 13 Jul 2015 00:48:34 +0000 (02:48 +0200)]
ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_center() part 3
Factor out common code from search_left_edge() and search_right_edge()
which checks whether searching for the window edge should stop. The
code is almost identical, so pull it into separate function and cater
for the minor differences.
Marek Vasut [Mon, 13 Jul 2015 00:38:15 +0000 (02:38 +0200)]
ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_center() part 2
Factor out common code from rw_mgr_mem_calibrate_writes_center()
and rw_mgr_mem_calibrate_vfifo_center() for searching for the
left edge of the window. The code is almost identical, so pull
it into separate function and cater for the minor differences.
Marek Vasut [Mon, 13 Jul 2015 00:11:02 +0000 (02:11 +0200)]
ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_center() part 1
Factor out common code from rw_mgr_mem_calibrate_writes_center()
and rw_mgr_mem_calibrate_vfifo_center() for searching for the
right edge of the window. The code is almost identical, so pull
it into separate function and cater for the minor differences.
Marek Vasut [Sat, 18 Jul 2015 05:23:25 +0000 (07:23 +0200)]
ddr: altera: Clean up rw_mgr_mem_calibrate_writes()
Reorder the content of the function a little and fix the comments
so they at least become full sentences. Constify function args.
Fix the return value to match the common convention of 0 meaning
success.
Marek Vasut [Sun, 19 Jul 2015 05:51:17 +0000 (07:51 +0200)]
ddr: altera: Clean up rw_mgr_mem_calibrate_read_test() part 3
The C language has signed types, so make use of them. Fix this
obscene loop, which tries to do away with unsigned type, but
just makes the code more cryptic.
Marek Vasut [Sun, 19 Jul 2015 05:27:06 +0000 (07:27 +0200)]
ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase() part 4
Implement common sdr_find_phase_delay() function and convert all
places which use such code to this unified function. No functional
change to the code.
Marek Vasut [Sun, 19 Jul 2015 05:00:26 +0000 (07:00 +0200)]
ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase() part 2
If d != 0 after sdr_working_phase() finishes, the else branch
of the condition has no impact on anything at all, since work_end
was already set independently of the value of "d" . Zap this
useless code.
Marek Vasut [Sun, 19 Jul 2015 04:45:43 +0000 (06:45 +0200)]
ddr: altera: Clean up find_vfifo_read()
Fix data types, constify where applicable, fix comments and debug
strings. In case enough failing reads are detected, just return
right away instead of breaking from the loop. This lets us make
the error handling at the end much simpler.
Marek Vasut [Sun, 19 Jul 2015 03:35:40 +0000 (05:35 +0200)]
ddr: altera: Clean up sdr_*_phase() part 6
It is now clear that the max_working_cnt variable is totally unused.
Zap the variable and zap other variables which became unused due to
this change too.
Marek Vasut [Sun, 19 Jul 2015 03:26:49 +0000 (05:26 +0200)]
ddr: altera: Clean up sdr_*_phase() part 5
Pull out the loop for eaching working/non-working DQS enable phase
into a separate function, as this is mostly common code between.
Clean up sdr_working_phase() and sdr_nonworking_phase() while switching
these two functions to the common sdr_find_phase().
Marek Vasut [Sun, 19 Jul 2015 03:01:12 +0000 (05:01 +0200)]
ddr: altera: Clean up sdr_*_phase() part 4
Get rid of found_{begin,end} variables. Instead of breaking out
through all of the loops, just return when the begin/end of the
window is found and be done with it. Also clean up the trailing
conditional expression, which is now much easier.
Marek Vasut [Sun, 19 Jul 2015 02:37:08 +0000 (04:37 +0200)]
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.
Marek Vasut [Sun, 19 Jul 2015 02:34:12 +0000 (04:34 +0200)]
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.
Marek Vasut [Sun, 19 Jul 2015 02:14:32 +0000 (04:14 +0200)]
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.
Marek Vasut [Sun, 19 Jul 2015 02:04:33 +0000 (04:04 +0200)]
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.