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ram: rockchip: debug: Get the cs capacity

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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>
This commit is contained in:
Jagan Teki 2019-07-15 23:58:50 +05:30 committed by Kever Yang
parent 07894f5aac
commit 79674a6278
1 changed files with 45 additions and 1 deletions
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46
drivers/ram/rockchip/sdram_debug.c
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@ -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");
}