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ARM: mvebu: add additional information to board_add_ram_info()

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Display more information about the current RAM configuration. With these
changes the output on a 88F6820 board is

  SoC:   MV88F6820-A0 at 1600 MHz
  DRAM:  2 GiB (800 MHz, 32-bit, ECC not enabled)

Signed-off-by: Joshua Scott <joshua.scott@alliedtelesis.co.nz>
Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Joshua Scott 2017-09-04 17:38:32 +12:00 committed by Stefan Roese
parent 0f8031a333
commit 631407c5c0
1 changed files with 45 additions and 0 deletions
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45
arch/arm/mach-mvebu/dram.c
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@ -216,6 +216,35 @@ static int ecc_enabled(void)
return 0; return 0;
} }
/* Return the width of the DRAM bus, or 0 for unknown. */
static int bus_width(void)
{
int full_width = 0;
if (reg_read(REG_SDRAM_CONFIG_ADDR) & (1 << REG_SDRAM_CONFIG_WIDTH_OFFS))
full_width = 1;
switch (mvebu_soc_family()) {
case MVEBU_SOC_AXP:
return full_width ? 64 : 32;
break;
case MVEBU_SOC_A375:
case MVEBU_SOC_A38X:
case MVEBU_SOC_MSYS:
return full_width ? 32 : 16;
default:
return 0;
}
}
static int cycle_mode(void)
{
int val = reg_read(REG_DUNIT_CTRL_LOW_ADDR);
return (val >> REG_DUNIT_CTRL_LOW_2T_OFFS) & REG_DUNIT_CTRL_LOW_2T_MASK;
}
#else #else
static void dram_ecc_scrubbing(void) static void dram_ecc_scrubbing(void)
{ {
@ -295,10 +324,26 @@ int dram_init_banksize(void)
void board_add_ram_info(int use_default) void board_add_ram_info(int use_default)
{ {
struct sar_freq_modes sar_freq; struct sar_freq_modes sar_freq;
int mode;
int width;
get_sar_freq(&sar_freq); get_sar_freq(&sar_freq);
printf(" (%d MHz, ", sar_freq.d_clk); printf(" (%d MHz, ", sar_freq.d_clk);
width = bus_width();
if (width)
printf("%d-bit, ", width);
mode = cycle_mode();
/* Mode 0 = Single cycle
* Mode 1 = Two cycles (2T)
* Mode 2 = Three cycles (3T)
*/
if (mode == 1)
printf("2T, ");
if (mode == 2)
printf("3T, ");
if (ecc_enabled()) if (ecc_enabled())
printf("ECC"); printf("ECC");
else else