ARM: mvebu: add additional information to board_add_ram_info()
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>
diff --git a/arch/arm/mach-mvebu/dram.c b/arch/arm/mach-mvebu/dram.c
index e3f304c..55e9ad7 100644
--- a/arch/arm/mach-mvebu/dram.c
+++ b/arch/arm/mach-mvebu/dram.c
@@ -216,6 +216,35 @@
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
static void dram_ecc_scrubbing(void)
{
@@ -295,10 +324,26 @@
void board_add_ram_info(int use_default)
{
struct sar_freq_modes sar_freq;
+ int mode;
+ int width;
get_sar_freq(&sar_freq);
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())
printf("ECC");
else