diff options
| author | Dmitry Osipenko <digetx@gmail.com> | 2021-10-07 00:46:58 +0200 |
|---|---|---|
| committer | Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> | 2021-10-15 09:52:47 +0200 |
| commit | 38322cf423f69b89b6e0eaad4017ab41cfe45b45 (patch) | |
| tree | 4c3e1ca263069269284391f6229fbb82a8da785d /drivers/memory/jedec_ddr.h | |
| parent | dt-bindings: memory: tegra20: emc: Document new LPDDR2 sub-node (diff) | |
| download | linux-38322cf423f69b89b6e0eaad4017ab41cfe45b45.tar.xz linux-38322cf423f69b89b6e0eaad4017ab41cfe45b45.zip | |
memory: Add LPDDR2-info helpers
Add common helpers for reading and parsing standard LPDDR2 configuration
properties.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20211006224659.21434-9-digetx@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Diffstat (limited to 'drivers/memory/jedec_ddr.h')
| -rw-r--r-- | drivers/memory/jedec_ddr.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/memory/jedec_ddr.h b/drivers/memory/jedec_ddr.h index e59ccbd982d0..6cd508478b14 100644 --- a/drivers/memory/jedec_ddr.h +++ b/drivers/memory/jedec_ddr.h @@ -112,6 +112,26 @@ #define NUM_DDR_ADDR_TABLE_ENTRIES 11 #define NUM_DDR_TIMING_TABLE_ENTRIES 4 +#define LPDDR2_MANID_SAMSUNG 1 +#define LPDDR2_MANID_QIMONDA 2 +#define LPDDR2_MANID_ELPIDA 3 +#define LPDDR2_MANID_ETRON 4 +#define LPDDR2_MANID_NANYA 5 +#define LPDDR2_MANID_HYNIX 6 +#define LPDDR2_MANID_MOSEL 7 +#define LPDDR2_MANID_WINBOND 8 +#define LPDDR2_MANID_ESMT 9 +#define LPDDR2_MANID_SPANSION 11 +#define LPDDR2_MANID_SST 12 +#define LPDDR2_MANID_ZMOS 13 +#define LPDDR2_MANID_INTEL 14 +#define LPDDR2_MANID_NUMONYX 254 +#define LPDDR2_MANID_MICRON 255 + +#define LPDDR2_TYPE_S4 0 +#define LPDDR2_TYPE_S2 1 +#define LPDDR2_TYPE_NVM 2 + /* Structure for DDR addressing info from the JEDEC spec */ struct lpddr2_addressing { u32 num_banks; @@ -170,6 +190,33 @@ extern const struct lpddr2_timings lpddr2_jedec_timings[NUM_DDR_TIMING_TABLE_ENTRIES]; extern const struct lpddr2_min_tck lpddr2_jedec_min_tck; +/* Structure of MR8 */ +union lpddr2_basic_config4 { + u32 value; + + struct { + unsigned int arch_type : 2; + unsigned int density : 4; + unsigned int io_width : 2; + } __packed; +}; + +/* + * Structure for information about LPDDR2 chip. All parameters are + * matching raw values of standard mode register bitfields or set to + * -ENOENT if info unavailable. + */ +struct lpddr2_info { + int arch_type; + int density; + int io_width; + int manufacturer_id; + int revision_id1; + int revision_id2; +}; + +const char *lpddr2_jedec_manufacturer(unsigned int manufacturer_id); + /* * Structure for timings for LPDDR3 based on LPDDR2 plus additional fields. * All parameters are in pico seconds(ps) excluding max_freq, min_freq which |