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ram: rockchip: debug: Get the cs capacity
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>
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@ -33,10 +33,46 @@ void sdram_print_dram_type(unsigned char dramtype)
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}
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}
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}
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}
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/**
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* cs = 0, cs0
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* cs = 1, cs1
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* cs => 2, cs0+cs1
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* note: it didn't consider about row_3_4
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*/
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u64 sdram_get_cs_cap(struct sdram_cap_info *cap_info, u32 cs, u32 dram_type)
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{
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u32 bg;
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u64 cap[2];
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if (dram_type == DDR4)
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/* DDR4 8bit dram BG = 2(4bank groups),
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* 16bit dram BG = 1 (2 bank groups)
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*/
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bg = (cap_info->dbw == 0) ? 2 : 1;
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else
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bg = 0;
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cap[0] = 1llu << (cap_info->bw + cap_info->col +
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bg + cap_info->bk + cap_info->cs0_row);
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if (cap_info->rank == 2)
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cap[1] = 1llu << (cap_info->bw + cap_info->col +
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bg + cap_info->bk + cap_info->cs1_row);
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else
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cap[1] = 0;
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if (cs == 0)
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return cap[0];
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else if (cs == 1)
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return cap[1];
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else
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return (cap[0] + cap[1]);
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}
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void sdram_print_ddr_info(struct sdram_cap_info *cap_info,
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void sdram_print_ddr_info(struct sdram_cap_info *cap_info,
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struct sdram_base_params *base)
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struct sdram_base_params *base)
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{
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{
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u32 bg;
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u32 bg, cap;
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bg = (cap_info->dbw == 0) ? 2 : 1;
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bg = (cap_info->dbw == 0) ? 2 : 1;
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@ -71,4 +107,12 @@ void sdram_print_ddr_info(struct sdram_cap_info *cap_info,
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printascii(" Die BW=");
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printascii(" Die BW=");
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printdec(8 << cap_info->dbw);
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printdec(8 << cap_info->dbw);
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cap = sdram_get_cs_cap(cap_info, 3, base->dramtype);
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if (cap_info->row_3_4)
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cap = cap * 3 / 4;
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printascii(" Size=");
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printdec(cap >> 20);
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printascii("MB\n");
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}
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}
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