The numeric constants in the switch statements are replaced by #defines added to the common ddr_spd.h header. This dramatically improves the readability of the switch statments.
In addition, a few of the longer lines were cleaned up, and the DDR2 type for an SO-RDIMM module was added to the DDR2 switch statement.
Signed-off-by: Kyle Moffett Kyle.D.Moffett@boeing.com Cc: Andy Fleming afleming@gmail.com Cc: Kumar Gala kumar.gala@freescale.com Cc: Kim Phillips kim.phillips@freescale.com --- arch/powerpc/cpu/mpc8xxx/ddr/ddr2_dimm_params.c | 23 +++++++----- arch/powerpc/cpu/mpc8xxx/ddr/ddr3_dimm_params.c | 43 ++++++++++------------ common/ddr_spd.c | 2 +- include/ddr_spd.h | 28 ++++++++++----- 4 files changed, 53 insertions(+), 43 deletions(-)
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/ddr2_dimm_params.c b/arch/powerpc/cpu/mpc8xxx/ddr/ddr2_dimm_params.c index dcb37ce..b565e33 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/ddr2_dimm_params.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/ddr2_dimm_params.c @@ -250,24 +250,27 @@ ddr_compute_dimm_parameters(const ddr2_spd_eeprom_t *spd, pdimm->primary_sdram_width = spd->primw; pdimm->ec_sdram_width = spd->ecw;
- /* FIXME: what about registered SO-DIMM? */ + /* These are all the types defined by the JEDEC DDR2 SPD 1.3 spec */ switch (spd->dimm_type) { - case 0x01: /* RDIMM */ - case 0x10: /* Mini-RDIMM */ - pdimm->registered_dimm = 1; /* register buffered */ + case DDR2_SPD_DIMMTYPE_RDIMM: + case DDR2_SPD_DIMMTYPE_72B_SO_RDIMM: + case DDR2_SPD_DIMMTYPE_MINI_RDIMM: + /* Registered/buffered DIMMs */ + pdimm->registered_dimm = 1; break;
- case 0x02: /* UDIMM */ - case 0x04: /* SO-DIMM */ - case 0x08: /* Micro-DIMM */ - case 0x20: /* Mini-UDIMM */ - pdimm->registered_dimm = 0; /* unbuffered */ + case DDR2_SPD_DIMMTYPE_UDIMM: + case DDR2_SPD_DIMMTYPE_SO_DIMM: + case DDR2_SPD_DIMMTYPE_MICRO_DIMM: + case DDR2_SPD_DIMMTYPE_MINI_UDIMM: + /* Unbuffered DIMMs */ + pdimm->registered_dimm = 0; break;
+ case DDR2_SPD_DIMMTYPE_72B_SO_CDIMM: default: printf("unknown dimm_type 0x%02X\n", spd->dimm_type); return 1; - break; }
/* SDRAM device parameters */ diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/ddr3_dimm_params.c b/arch/powerpc/cpu/mpc8xxx/ddr/ddr3_dimm_params.c index 29cea53..756b15f 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/ddr3_dimm_params.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/ddr3_dimm_params.c @@ -128,24 +128,32 @@ ddr_compute_dimm_parameters(const ddr3_spd_eeprom_t *spd, pdimm->data_width = pdimm->primary_sdram_width + pdimm->ec_sdram_width;
- switch (spd->module_type & 0xf) { - case 0x01: /* RDIMM */ - case 0x05: /* Mini-RDIMM */ - pdimm->registered_dimm = 1; /* register buffered */ + /* These are the types defined by the JEDEC DDR3 SPD spec */ + pdimm->mirrored_dimm = 0; + pdimm->registered_dimm = 0; + switch (spd->module_type & DDR3_SPD_MODULETYPE_MASK) { + case DDR3_SPD_MODULETYPE_RDIMM: + case DDR3_SPD_MODULETYPE_MINI_RDIMM: + /* Registered/buffered DIMMs */ + pdimm->registered_dimm = 1; for (i = 0; i < 16; i += 2) { - pdimm->rcw[i] = spd->mod_section.registered.rcw[i/2] & 0x0F; - pdimm->rcw[i+1] = (spd->mod_section.registered.rcw[i/2] >> 4) & 0x0F; + u8 rcw = spd->mod_section.registered.rcw[i/2]; + pdimm->rcw[i] = (rcw >> 0) & 0x0F; + pdimm->rcw[i+1] = (rcw >> 4) & 0x0F; } break; - case 0x02: /* UDIMM */ - case 0x03: /* SO-DIMM */ - case 0x04: /* Micro-DIMM */ - case 0x06: /* Mini-UDIMM */ - pdimm->registered_dimm = 0; /* unbuffered */ + + case DDR3_SPD_MODULETYPE_UDIMM: + case DDR3_SPD_MODULETYPE_SO_DIMM: + case DDR3_SPD_MODULETYPE_MICRO_DIMM: + case DDR3_SPD_MODULETYPE_MINI_UDIMM: + /* Unbuffered DIMMs */ + if (spd->mod_section.unbuffered.addr_mapping & 0x1) + pdimm->mirrored_dimm = 1; break;
default: - printf("unknown dimm_type 0x%02X\n", spd->module_type); + printf("unknown module_type 0x%02X\n", spd->module_type); return 1; }
@@ -303,16 +311,5 @@ ddr_compute_dimm_parameters(const ddr3_spd_eeprom_t *spd, pdimm->tFAW_ps = (((spd->tFAW_msb & 0xf) << 8) | spd->tFAW_min) * mtb_ps;
- /* - * We need check the address mirror for unbuffered DIMM - * If SPD indicate the address map mirror, The DDR controller - * need care it. - */ - if ((spd->module_type == SPD_MODULETYPE_UDIMM) || - (spd->module_type == SPD_MODULETYPE_SODIMM) || - (spd->module_type == SPD_MODULETYPE_MICRODIMM) || - (spd->module_type == SPD_MODULETYPE_MINIUDIMM)) - pdimm->mirrored_dimm = spd->mod_section.unbuffered.addr_mapping & 0x1; - return 0; } diff --git a/common/ddr_spd.c b/common/ddr_spd.c index a7a30de..7a388bb 100644 --- a/common/ddr_spd.c +++ b/common/ddr_spd.c @@ -18,7 +18,7 @@ spd_check(const u8 *buf, u8 spd_rev, u8 spd_cksum)
/* * Check SPD revision supported - * Rev 1.2 or less supported by this code + * Rev 1.X or less supported by this code */ if (spd_rev >= 0x20) { printf("SPD revision %02X not supported by this code\n", diff --git a/include/ddr_spd.h b/include/ddr_spd.h index 710e528..e895d61 100644 --- a/include/ddr_spd.h +++ b/include/ddr_spd.h @@ -304,14 +304,24 @@ extern unsigned int ddr3_spd_check(const ddr3_spd_eeprom_t *spd); #define SPD_MEMTYPE_DDR2_FBDIMM_PROBE (0x0A) #define SPD_MEMTYPE_DDR3 (0x0B)
-/* - * Byte 3 Key Byte / Module Type for DDR3 SPD - */ -#define SPD_MODULETYPE_RDIMM (0x01) -#define SPD_MODULETYPE_UDIMM (0x02) -#define SPD_MODULETYPE_SODIMM (0x03) -#define SPD_MODULETYPE_MICRODIMM (0x04) -#define SPD_MODULETYPE_MINIRDIMM (0x05) -#define SPD_MODULETYPE_MINIUDIMM (0x06) +/* DIMM Type for DDR2 SPD (according to v1.3) */ +#define DDR2_SPD_DIMMTYPE_UNDEFINED (0x00) +#define DDR2_SPD_DIMMTYPE_RDIMM (0x01) +#define DDR2_SPD_DIMMTYPE_UDIMM (0x02) +#define DDR2_SPD_DIMMTYPE_SO_DIMM (0x04) +#define DDR2_SPD_DIMMTYPE_72B_SO_CDIMM (0x06) +#define DDR2_SPD_DIMMTYPE_72B_SO_RDIMM (0x07) +#define DDR2_SPD_DIMMTYPE_MICRO_DIMM (0x08) +#define DDR2_SPD_DIMMTYPE_MINI_RDIMM (0x10) +#define DDR2_SPD_DIMMTYPE_MINI_UDIMM (0x20) + +/* Byte 3 Key Byte / Module Type for DDR3 SPD */ +#define DDR3_SPD_MODULETYPE_MASK (0x0f) +#define DDR3_SPD_MODULETYPE_RDIMM (0x01) +#define DDR3_SPD_MODULETYPE_UDIMM (0x02) +#define DDR3_SPD_MODULETYPE_SO_DIMM (0x03) +#define DDR3_SPD_MODULETYPE_MICRO_DIMM (0x04) +#define DDR3_SPD_MODULETYPE_MINI_RDIMM (0x05) +#define DDR3_SPD_MODULETYPE_MINI_UDIMM (0x06)
#endif /* _DDR_SPD_H_ */