diff options
| author | Lukas Schmid <[email protected]> | 2025-10-26 12:41:17 +0100 |
|---|---|---|
| committer | Andre Przywara <[email protected]> | 2026-01-25 23:29:32 +0000 |
| commit | d8ee42f113474c81f2d25a98e6cbcd60cf5bdfd5 (patch) | |
| tree | 5052e4706b44c06fe916b8c3a6fbbd7c06329b3d | |
| parent | 0ffca1dff1e8960b5920dfc3164e0fcd5892b961 (diff) | |
sunxi: extend R528/T113-s3/D1(s) DRAM initialisation
The T113-s4 SoC is using the same die as the T113-s3, but comes with
256MiB of co-packaged DRAM. Besides the doubled size, the DRAM chip
seems to be connected slightly differently, which requires to use a
different pin remapping.
Extend the DRAM initialisation code to add support for the T113-S4 aka
T113M4020DC0 by checking the SoC's CHIPID, which is stored in the first
word of the SID efuses.
Signed-off-by: Lukas Schmid <[email protected]>
Tested-by: John Watts <[email protected]>
Reviewed-by: John Watts <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
Signed-off-by: Andre Przywara <[email protected]>
| -rw-r--r-- | drivers/ram/sunxi/dram_sun20i_d1.c | 10 | ||||
| -rw-r--r-- | drivers/ram/sunxi/dram_sun20i_d1.h | 11 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/ram/sunxi/dram_sun20i_d1.c b/drivers/ram/sunxi/dram_sun20i_d1.c index a1794032f3b..79cf0a51e47 100644 --- a/drivers/ram/sunxi/dram_sun20i_d1.c +++ b/drivers/ram/sunxi/dram_sun20i_d1.c @@ -54,6 +54,11 @@ static void sid_read_ldoB_cal(const dram_para_t *para) clrsetbits_le32(0x3000150, 0xff00, reg << 8); } +static uint32_t sid_read_soc_chipid(void) +{ + return readl(SUNXI_SID_BASE + 0x00) & 0xffff; +} + static void dram_voltage_set(const dram_para_t *para) { int vol; @@ -663,6 +668,11 @@ static void mctl_phy_ac_remapping(const dram_para_t *para, fuse = (readl(SUNXI_SID_BASE + 0x28) & 0xf00) >> 8; debug("DDR efuse: 0x%x\n", fuse); + debug("SoC Chip ID: 0x%08x\n", sid_read_soc_chipid()); + + /* No remapping needed on T113-s4 with 256MB co-packaged DRAM */ + if (sid_read_soc_chipid() == SUNXI_CHIPID_T113M4020DC0) + return; if (para->dram_type == SUNXI_DRAM_TYPE_DDR2) { if (fuse == 15) diff --git a/drivers/ram/sunxi/dram_sun20i_d1.h b/drivers/ram/sunxi/dram_sun20i_d1.h index 91383f6cf10..83ae7eb36cd 100644 --- a/drivers/ram/sunxi/dram_sun20i_d1.h +++ b/drivers/ram/sunxi/dram_sun20i_d1.h @@ -20,6 +20,17 @@ enum sunxi_dram_type { }; /* + * Chip-IDs taken from + * https://github.com/ua1arn/hftrx/blob/25d8cb9e4cfe1d7d0e4a2f641025c88a9ec5e758/inc/clocks.h#L250 + */ +enum sunxi_soc_chipid { + SUNXI_CHIPID_F133A = 0x5C00, + SUNXI_CHIPID_D1S = 0x5E00, + SUNXI_CHIPID_T113S3 = 0x6000, + SUNXI_CHIPID_T113M4020DC0 = 0x7200, +}; + +/* * This structure contains a mixture of fixed configuration settings, * variables that are used at runtime to communicate settings between * different stages and functions, and unused values. |