diff options
Diffstat (limited to 'arch/arm/mach-sunxi/dram_sunxi_dw.c')
| -rw-r--r-- | arch/arm/mach-sunxi/dram_sunxi_dw.c | 94 |
1 files changed, 74 insertions, 20 deletions
diff --git a/arch/arm/mach-sunxi/dram_sunxi_dw.c b/arch/arm/mach-sunxi/dram_sunxi_dw.c index d060001..2b9d631 100644 --- a/arch/arm/mach-sunxi/dram_sunxi_dw.c +++ b/arch/arm/mach-sunxi/dram_sunxi_dw.c @@ -399,11 +399,19 @@ static void mctl_set_cr(uint16_t socid, struct dram_para *para) #else #error Unsupported DRAM type! #endif - (para->bank_bits == 3 ? MCTL_CR_EIGHT_BANKS : MCTL_CR_FOUR_BANKS) | + (para->ranks[0].bank_bits == 3 ? MCTL_CR_EIGHT_BANKS : MCTL_CR_FOUR_BANKS) | MCTL_CR_BUS_FULL_WIDTH(para->bus_full_width) | (para->dual_rank ? MCTL_CR_DUAL_RANK : MCTL_CR_SINGLE_RANK) | - MCTL_CR_PAGE_SIZE(para->page_size) | - MCTL_CR_ROW_BITS(para->row_bits), &mctl_com->cr); + MCTL_CR_PAGE_SIZE(para->ranks[0].page_size) | + MCTL_CR_ROW_BITS(para->ranks[0].row_bits), &mctl_com->cr); + + if (para->dual_rank && (socid == SOCID_A64 || socid == SOCID_R40)) { + writel((para->ranks[1].bank_bits == 3 ? MCTL_CR_EIGHT_BANKS : MCTL_CR_FOUR_BANKS) | + MCTL_CR_BUS_FULL_WIDTH(para->bus_full_width) | + MCTL_CR_DUAL_RANK | + MCTL_CR_PAGE_SIZE(para->ranks[1].page_size) | + MCTL_CR_ROW_BITS(para->ranks[1].row_bits), &mctl_com->cr_r1); + } if (socid == SOCID_R40) { if (para->dual_rank) @@ -646,35 +654,63 @@ static int mctl_channel_init(uint16_t socid, struct dram_para *para) return 0; } -static void mctl_auto_detect_dram_size(uint16_t socid, struct dram_para *para) +/* + * Test if memory at offset offset matches memory at a certain base + */ +static bool mctl_mem_matches_base(u32 offset, ulong base) +{ + /* Try to write different values to RAM at two addresses */ + writel(0, base); + writel(0xaa55aa55, base + offset); + dsb(); + /* Check if the same value is actually observed when reading back */ + return readl(base) == + readl(base + offset); +} + +static void mctl_auto_detect_dram_size_rank(uint16_t socid, struct dram_para *para, ulong base, struct rank_para *rank) { /* detect row address bits */ - para->page_size = 512; - para->row_bits = 16; - para->bank_bits = 2; + rank->page_size = 512; + rank->row_bits = 16; + rank->bank_bits = 2; mctl_set_cr(socid, para); - for (para->row_bits = 11; para->row_bits < 16; para->row_bits++) - if (mctl_mem_matches((1 << (para->row_bits + para->bank_bits)) * para->page_size)) + for (rank->row_bits = 11; rank->row_bits < 16; rank->row_bits++) + if (mctl_mem_matches_base((1 << (rank->row_bits + rank->bank_bits)) * rank->page_size, base)) break; /* detect bank address bits */ - para->bank_bits = 3; + rank->bank_bits = 3; mctl_set_cr(socid, para); - for (para->bank_bits = 2; para->bank_bits < 3; para->bank_bits++) - if (mctl_mem_matches((1 << para->bank_bits) * para->page_size)) + for (rank->bank_bits = 2; rank->bank_bits < 3; rank->bank_bits++) + if (mctl_mem_matches_base((1 << rank->bank_bits) * rank->page_size, base)) break; /* detect page size */ - para->page_size = 8192; + rank->page_size = 8192; mctl_set_cr(socid, para); - for (para->page_size = 512; para->page_size < 8192; para->page_size *= 2) - if (mctl_mem_matches(para->page_size)) + for (rank->page_size = 512; rank->page_size < 8192; rank->page_size *= 2) + if (mctl_mem_matches_base(rank->page_size, base)) break; } +static unsigned long mctl_calc_rank_size(struct rank_para *rank) +{ + return (1UL << (rank->row_bits + rank->bank_bits)) * rank->page_size; +} + +static void mctl_auto_detect_dram_size(uint16_t socid, struct dram_para *para) +{ + mctl_auto_detect_dram_size_rank(socid, para, (ulong)CONFIG_SYS_SDRAM_BASE, ¶->ranks[0]); + + if ((socid == SOCID_A64 || socid == SOCID_R40) && para->dual_rank) { + mctl_auto_detect_dram_size_rank(socid, para, (ulong)CONFIG_SYS_SDRAM_BASE + mctl_calc_rank_size(¶->ranks[0]), ¶->ranks[1]); + } +} + /* * The actual values used here are taken from Allwinner provided boot0 * binaries, though they are probably board specific, so would likely benefit @@ -769,12 +805,23 @@ unsigned long sunxi_dram_init(void) struct sunxi_mctl_ctl_reg * const mctl_ctl = (struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL0_BASE; + unsigned long size; + struct dram_para para = { .dual_rank = 1, .bus_full_width = 1, - .row_bits = 15, - .bank_bits = 3, - .page_size = 4096, + .ranks = { + { + .row_bits = 15, + .bank_bits = 3, + .page_size = 4096, + }, + { + .row_bits = 15, + .bank_bits = 3, + .page_size = 4096, + } + }, #if defined(CONFIG_MACH_SUN8I_H3) .dx_read_delays = SUN8I_H3_DX_READ_DELAYS, @@ -846,6 +893,13 @@ unsigned long sunxi_dram_init(void) mctl_auto_detect_dram_size(socid, ¶); mctl_set_cr(socid, ¶); - return (1UL << (para.row_bits + para.bank_bits)) * para.page_size * - (para.dual_rank ? 2 : 1); + size = mctl_calc_rank_size(¶.ranks[0]); + if (socid == SOCID_A64 || socid == SOCID_R40) { + if (para.dual_rank) + size += mctl_calc_rank_size(¶.ranks[1]); + } else if (para.dual_rank) { + size *= 2; + } + + return size; } |