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liblitedram: Move pattern testing to its own function

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Signed-off-by: Maciej Dudek <mdudek@antmicro.com>
This commit is contained in:
Maciej Dudek 2022-10-13 12:12:31 +02:00 committed by Michal Sieron
parent 155bf31e04
commit 7b7fdadd26
1 changed files with 18 additions and 9 deletions
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27
litex/soc/software/liblitedram/sdram.c
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@ -370,6 +370,19 @@ static unsigned int sdram_write_read_check_test_pattern(int module, unsigned int
return errors;
}
static int _seed_array[] = {42, 84, 36, 72, 24, 48};
static int _seed_array_length = sizeof(_seed_array) / sizeof(_seed_array[0]);
static int run_test_pattern(int module)
{
int errors = 0;
for (int i = 0; i < _seed_array_length; i++) {
errors += sdram_write_read_check_test_pattern(module, _seed_array[i]);
}
return errors;
}
static void sdram_leveling_center_module(
int module, int show_short, int show_long, delay_callback rst_delay, delay_callback inc_delay)
{
@ -387,8 +400,7 @@ static void sdram_leveling_center_module(
delay = 0;
rst_delay(module);
while(1) {
errors = sdram_write_read_check_test_pattern(module, 42);
errors += sdram_write_read_check_test_pattern(module, 84);
errors = run_test_pattern(module);
working = errors == 0;
show = show_long;
#if SDRAM_PHY_DELAYS > 32
@ -410,8 +422,7 @@ static void sdram_leveling_center_module(
cur_delay_min = delay_min;
/* Find largest working delay range */
while(1) {
errors = sdram_write_read_check_test_pattern(module, 42);
errors += sdram_write_read_check_test_pattern(module, 84);
errors = run_test_pattern(module);
working = errors == 0;
show = show_long;
#if SDRAM_PHY_DELAYS > 32
@ -467,8 +478,7 @@ static void sdram_leveling_center_module(
}
/* Check */
errors = sdram_write_read_check_test_pattern(module, 42);
errors += sdram_write_read_check_test_pattern(module, 84);
errors = run_test_pattern(module);
if (errors == 0)
break;
retries--;
@ -949,7 +959,7 @@ static void sdram_read_leveling_inc_bitslip(char m)
static unsigned int sdram_read_leveling_scan_module(int module, int bitslip, int show)
{
const unsigned int max_errors = 2*READ_CHECK_TEST_PATTERN_MAX_ERRORS;
const unsigned int max_errors = _seed_array_length * READ_CHECK_TEST_PATTERN_MAX_ERRORS;
int i;
unsigned int score;
unsigned int errors;
@ -965,8 +975,7 @@ static unsigned int sdram_read_leveling_scan_module(int module, int bitslip, int
#if SDRAM_PHY_DELAYS > 32
_show = (i%16 == 0) & show;
#endif
errors = sdram_write_read_check_test_pattern(module, 42);
errors += sdram_write_read_check_test_pattern(module, 84);
errors = run_test_pattern(module);
working = errors == 0;
/* When any scan is working then the final score will always be higher then if no scan was working */
score += (working * max_errors*SDRAM_PHY_DELAYS) + (max_errors - errors);