On 2019/7/16 上午2:28, Jagan Teki wrote:
Add code to get the channel capacity, this would help to print the capacity of specific channel.
Here is sample print on LPDDR4, 50MHz channel 0 BW=32 Col=10 Bk=8 CS0 Row=15 CS1 Row=15 CS=2 Die BW=16 Size=2048MB
Signed-off-by: Jagan Teki jagan@amarulasolutions.com Signed-off-by: YouMin Chen cym@rock-chips.com
Reviewed-by: Kever Yang Kever.yang@rock-chips.com
Thanks, - Kever
drivers/ram/rockchip/sdram_debug.c | 46 +++++++++++++++++++++++++++++- 1 file changed, 45 insertions(+), 1 deletion(-)
diff --git a/drivers/ram/rockchip/sdram_debug.c b/drivers/ram/rockchip/sdram_debug.c index 69a6f94a73..19e9225c12 100644 --- a/drivers/ram/rockchip/sdram_debug.c +++ b/drivers/ram/rockchip/sdram_debug.c @@ -33,10 +33,46 @@ void sdram_print_dram_type(unsigned char dramtype) } }
+/**
- cs = 0, cs0
- cs = 1, cs1
- cs => 2, cs0+cs1
- note: it didn't consider about row_3_4
- */
+u64 sdram_get_cs_cap(struct sdram_cap_info *cap_info, u32 cs, u32 dram_type) +{
- u32 bg;
- u64 cap[2];
- if (dram_type == DDR4)
/* DDR4 8bit dram BG = 2(4bank groups),* 16bit dram BG = 1 (2 bank groups)*/bg = (cap_info->dbw == 0) ? 2 : 1;- else
bg = 0;- cap[0] = 1llu << (cap_info->bw + cap_info->col +
bg + cap_info->bk + cap_info->cs0_row);- if (cap_info->rank == 2)
cap[1] = 1llu << (cap_info->bw + cap_info->col +bg + cap_info->bk + cap_info->cs1_row);- else
cap[1] = 0;- if (cs == 0)
return cap[0];- else if (cs == 1)
return cap[1];- else
return (cap[0] + cap[1]);+}
- void sdram_print_ddr_info(struct sdram_cap_info *cap_info, struct sdram_base_params *base) {
- u32 bg;
u32 bg, cap;
bg = (cap_info->dbw == 0) ? 2 : 1;
@@ -71,4 +107,12 @@ void sdram_print_ddr_info(struct sdram_cap_info *cap_info,
printascii(" Die BW="); printdec(8 << cap_info->dbw);
- cap = sdram_get_cs_cap(cap_info, 3, base->dramtype);
- if (cap_info->row_3_4)
cap = cap * 3 / 4;- printascii(" Size=");
- printdec(cap >> 20);
- printascii("MB\n"); }