decode-dimms perl script is used as prototype (see https://github.com/groeck/i2c-tools/blob/master/eeprom/decode-dimms). Here is a sample decode output: barebox@barebox sandbox:/ decode env/crucial_pc2-6400_ddr2 Decoding EEPROM: env/crucial_pc2-6400_ddr2 ---=== SPD EEPROM Information ===--- EEPROM Checksum of bytes 0-62 OK (0xCA) Total number of bytes in EEPROM 256 Fundamental Memory type DDR2 SDRAM SPD Revision 1.3 ---=== Memory Characteristics ===--- Maximum module speed 800 MHz (PC2-6400) Size 1024 MB Banks x Rows x Columns x Bits 8 x 14 x 10 x 64 Ranks 1 SDRAM Device Width 8 bits Module Height 30.0 mm Module Type SO-DIMM (67.6 mm) DRAM Package Planar Voltage Interface Level SSTL 1.8V Module Configuration Type No Parity Refresh Rate Reduced (7.8 us) - Self Refresh Supported Burst Lengths 4, 8 Supported CAS Latencies (tCL) 6T tCL-tRCD-tRP-tRAS 6-6-6-18 as DDR2-800 Minimum Cycle Time 250 (ns*100) at CAS 6 Maximum Access Time 4 (ns*10) at CAS 6 Maximum Cycle Time (tCK max) 8 ns ---=== Timing Parameters ===--- Address/Command Setup Time Before Clock (tIS) 17 (ns*100) Address/Command Hold Time After Clock (tIH) 25 (ns*100) Data Input Setup Time Before Strobe (tDS) 5 (ns*100) Data Input Hold Time After Strobe (tDH) 12 (ns*100) Minimum Row Precharge Delay (tRP) 150 (ns*10) Minimum Row Active to Row Active Delay (tRRD) 75 (ns*10) Minimum RAS# to CAS# Delay (tRCD) 150 (ns*10) Minimum RAS# Pulse Width (tRAS) 450 (ns*10) Write Recovery Time (tWR) 150 (ns*10) Minimum Write to Read CMD Delay (tWTR) 75 (ns*10) Minimum Read to Pre-charge CMD Delay (tRTP) 75 (ns*10) Minimum Active to Auto-refresh Delay (tRC) 600 (ns*10) Minimum Recovery Delay (tRFC) 1270 (ns*10) Maximum DQS to DQ Skew (tDQSQ) 20 (ns*100) Maximum Read Data Hold Skew (tQHS) 30 (ns*100) ---=== Manufacturing Information ===--- Manufacturer JEDEC ID 7f 7f 7f 7f 7f 9b 00 00 Part Number CT12864AC800.M8FM8 Manufacturing Date 2014-W24 Assembly Serial Number 0x00000000 TODOs: * Timing Parameters section output format is slightly differ from decode-dimms' format; * supports only DDR2 SPD EEPROM. Signed-off-by: Smirnov Alexander <alllecs@xxxxxxxxx> --- commands/Kconfig | 6 + commands/Makefile | 1 + commands/decode.c | 328 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 335 insertions(+) diff --git a/commands/Kconfig b/commands/Kconfig index bb6674e..f0e0b75 100644 --- a/commands/Kconfig +++ b/commands/Kconfig @@ -2102,6 +2102,12 @@ config CMD_STATE depends on STATE prompt "state" +config CMD_DECODE + tristate + prompt "decode" + help + decode spd eeprom + # end Miscellaneous commands endmenu diff --git a/commands/Makefile b/commands/Makefile index 3698347..71cd877 100644 --- a/commands/Makefile +++ b/commands/Makefile @@ -112,3 +112,4 @@ obj-$(CONFIG_CMD_NV) += nv.o obj-$(CONFIG_CMD_DEFAULTENV) += defaultenv.o obj-$(CONFIG_CMD_STATE) += state.o obj-$(CONFIG_CMD_DHCP) += dhcp.o +obj-$(CONFIG_CMD_DECODE) += decode.o diff --git a/commands/decode.c b/commands/decode.c new file mode 100644 index 0000000..7294b11 --- /dev/null +++ b/commands/decode.c @@ -0,0 +1,328 @@ +#include <fcntl.h> +#include <common.h> +#include <getopt.h> +#include <command.h> +#include <envfs.h> +#include <errno.h> +#include <fs.h> +#include <libfile.h> +#include <malloc.h> +#include <globalvar.h> +#include <stdlib.h> +#include <stdio.h> + +#ifndef __BAREBOX__ +static inline int fls(int x) +{ + int r = 32; + + if (!x) + return 0; + if (!(x & 0xffff0000u)) { + x <<= 16; + r -= 16; + } + if (!(x & 0xff000000u)) { + x <<= 8; + r -= 8; + } + if (!(x & 0xf0000000u)) { + x <<= 4; + r -= 4; + } + if (!(x & 0xc0000000u)) { + x <<= 2; + r -= 2; + } + if (!(x & 0x80000000u)) { + x <<= 1; + r -= 1; + } + return r; +} +#endif + +char *heights[] = { + "<25.4", + "25.4", + "25.4 - 30.0", + "30.0", + "30.5", + "> 30.5" +}; + +char *sdram_voltage_interface_level[] = { + "TTL (5V tolerant)", + "LVTTL (not 5V tolerant)", + "HSTL 1.5V", + "SSTL 3.3V", + "SSTL 2.5V", + "SSTL 1.8V" +}; + +char *ddr2_module_types[] = { + "RDIMM (133.35 mm)", + "UDIMM (133.25 mm)", + "SO-DIMM (67.6 mm)", + "Micro-DIMM (45.5 mm)", + "Mini-RDIMM (82.0 mm)", + "Mini-UDIMM (82.0 mm)" +}; + +char *refresh[] = { + "15.625", + "3.9", + "7.8", + "31.3", + "62.5", + "125" +}; + +char *type_list[] = { + "Reserved", + "FPM DRAM", + "EDO", + "Pipelined Nibble", + "SDR SDRAM", + "Multiplexed ROM", + "DDR SGRAM", + "DDR SDRAM", + "DDR2 SDRAM", + "FB-DIMM", + "FB-DIMM Probe", + "DDR3 SDRAM" +}; + +int funct(uint8_t addr) +{ + int t; + + t = ((addr >> 4) * 10 + (addr & 0xf)); + + return t; +} + +int ddr2_sdram_atime(uint8_t addr) +{ + int t; + +// t = ((addr >> 4) * 0.1 + (addr & 0xf) * 0.01); + t = ((addr >> 4) + (addr & 0xf)); + + return t; +} + +void dump(uint8_t *addr, int len) +{ + int i; + + printf("\t 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f\n\n"); + + for (i = 0; i < len; i++) { + if ((i % 0x10) == 0x00) { + printf("%07x:", i); + } + printf(" %02x", addr[i]); + if ((i % 0x10) == 0xf) { + printf("\n"); + } + } + + printf("\n"); +} + +int ddr2_sdram_ctime(uint8_t byte) +{ + int ctime; + + ctime = (byte >> 4) * 100; + if ((byte & 0xf) <= 9) { + ctime += (byte & 0xf) * 10; + } else if ((byte & 0xf) == 10) { + ctime += 25; + } else if ((byte & 0xf) == 11) { + ctime += 33; + } else if ((byte & 0xf) == 12) { + ctime += 66; + } else if ((byte & 0xf) == 13) { + ctime += 75; + } + return ctime; +} + +static int do_decode(int argc, char *argv[]) +{ + int highestCAS = 0; + int cas[256]; + int i, i_i, k; + int ddrclk, tbits, pcclk; + int trcd, trp, tras; + int ctime; + int fp; + uint8_t record[256]; + uint8_t parity; + char *ref; + + if (argc != 2) { + printf("Отсутствует или указано больше 1 аргумента\n"); + return 2; + } + + fp = open(argv[1], O_RDONLY); + + if (fp == 0) { + perror("Ошибка при работе с файлом"); + return 3; + } + + read(fp, &record[0], 256); + close(fp); + +// dump(&record[0], 256); + + printf("Decoding EEPROM: %s\n\n", argv[1]); + + printf("---=== SPD EEPROM Information ===---\n"); + printf("EEPROM Checksum of bytes 0-62\t\t\t OK (0x%0X)\n", record[63]); + printf("# of bytes written to SDRAM EEPROM\t\t %d\n", record[0]); + printf("Total number of bytes in EEPROM\t\t\t %d\n", 1 << record[1]); + + if (record[2] < 11) { + printf("Fundamental Memory type\t\t\t\t %s\n", type_list[record[2]]); + } else { + printf("Warning: unknown memory type (%02x)\n", record[2]); + } + printf("SPD Revision\t\t\t\t\t %x.%x\n", record[62] >> 4, record[62] & 0x0f); + + printf("\n---=== Memory Characteristics ===---\n"); + + ctime = ddr2_sdram_ctime(record[9]); + ddrclk = 2 * (1000 / ctime) * 100; + tbits = (record[7] << 8) + record[6]; + if ((record[11] & 0x03) == 1) { + tbits = tbits - 8; + } + pcclk = ddrclk * tbits / 8; + pcclk = pcclk - (pcclk % 100); + printf("Maximum module speed\t\t\t\t %d MHz (PC2-%d)\n", ddrclk, pcclk); + i_i= (record[3] & 0x0f) + (record[4] & 0x0f) - 17; + k = ((record[5] & 0x7) + 1) * record[17]; + + if (i_i > 0 && i_i <= 12 && k > 0) { + printf("Size\t\t\t\t\t\t %d MB\n", ((1 << i_i) * k)); + } else { + printf("Size\t\t\t\t\t\t INVALID: %02x %02x %02x %02x\n", record[3], record[4], record[5], record[17]); + } + printf("Banks x Rows x Columns x Bits\t\t\t %d x %d x %d x %d\n", record[17], record[3], record[4], record[6]); + printf("Ranks\t\t\t\t\t\t %d\n", (record[5] & 0x7) + 1); + printf("SDRAM Device Width\t\t\t\t %d bits\n", record[13]); + + if ((record[5] >> 5) < 7) { + printf("Module Height\t\t\t\t\t %s mm\n", heights[(record[5] >> 5)]); + } else { + printf("Error height\n"); + } + printf("Module Type\t\t\t\t\t %s\n", ddr2_module_types[fls(record[20]) - 1]); + printf("DRAM Package\t\t\t\t\t "); + if ((record[5] & 0x10) == 1) { + printf("Stack\n"); + } else { + printf("Planar\n"); + } + if (record[8] < 7) { + printf("Voltage Interface Level\t\t\t\t %s\n", sdram_voltage_interface_level[record[8]]); + } else { + printf("Error Voltage Interface Level\n"); + } + printf("Module Configuration Type \t\t\t "); + + parity = record[11] & 0x07; + + if (parity == 0) { + printf("No Parity\n"); + } + if ((parity & 0x03) == 0x01) { + printf("Data Parity\n"); + } + if (parity & 0x02) { + printf("Data ECC\n"); + } + if (parity & 0x04) { + printf("Address/Command Parity\n"); + } + + if ((record[12] >> 7) == 1) { + ref = "- Self Refresh"; + } else { + ref = " "; + } + printf("Refresh Rate\t\t\t\t\t Reduced (%s us) %s\n", refresh[record[12] & 0x7f], ref); + printf("Supported Burst Lengths\t\t\t\t %d, %d\n", record[16] & 4, record[16] & 8); + + trcd = ((record[29] >> 2) + ((record[29] & 3) * 0.25)) / ctime * 100; + trp = ((record[27] >> 2) + ((record[27] & 3) * 0.25)) / ctime * 100; + tras = record[30] * 100 / ctime ; + + for (i_i = 2; i_i < 7; i_i++) { + if (record[18] & (1 << i_i)) { + highestCAS = i_i; + cas[highestCAS]++; + } + } + + printf("Supported CAS Latencies (tCL)\t\t\t %dT\n", highestCAS); + printf("tCL-tRCD-tRP-tRAS\t\t\t\t %d-%d-%d-%d as DDR2-%d\n", highestCAS, trcd, trp, tras, ddrclk); + printf("Minimum Cycle Time\t\t\t\t %d (ns*10) at CAS %d\n", ctime / 10, highestCAS); + printf("Maximum Access Time\t\t\t\t %d (ns*10) at CAS %d\n", ddr2_sdram_atime(record[10]), highestCAS); + printf("Maximum Cycle Time (tCK max)\t\t\t %d ns\n", (record[43] >> 4) + (record[43] & 0x0f)); + + printf("\n---=== Timing Parameters ===---\n"); + printf("Address/Command Setup Time Before Clock (tIS)\t %d (ns*100)\n", (funct(record[32]))); + printf("Address/Command Hold Time After Clock (tIH)\t %d (ns*100)\n", (funct(record[33]))); + printf("Data Input Setup Time Before Strobe (tDS)\t %d (ns*100)\n", (funct(record[34]))); + printf("Data Input Hold Time After Strobe (tDH)\t\t %d (ns*100)\n", (funct(record[35]))); + + printf("Minimum Row Precharge Delay (tRP)\t\t %d (ns*10)\n", (record[27] & 0xfc) * 10 / 4); + printf("Minimum Row Active to Row Active Delay (tRRD)\t %d (ns*10)\n", record[28] * 10 / 4); + printf("Minimum RAS# to CAS# Delay (tRCD)\t\t %d (ns*10)\n", (record[29] & 0xfc) * 10 / 4); + printf("Minimum RAS# Pulse Width (tRAS)\t\t\t %d (ns*10)\n", ((record[30] & 0xfc) + (record[30] & 0x3)) * 10); + printf("Write Recovery Time (tWR)\t\t\t %d (ns*10)\n", record[36] * 10/ 4); + printf("Minimum Write to Read CMD Delay (tWTR)\t\t %d (ns*10)\n", record[37] * 10 / 4); + printf("Minimum Read to Pre-charge CMD Delay (tRTP)\t %d (ns*10)\n", record[38] * 10/ 4); + printf("Minimum Active to Auto-refresh Delay (tRC)\t %d (ns*10)\n", record[41] * 10); + printf("Minimum Recovery Delay (tRFC)\t\t\t %d (ns*10)\n", record[42] * 10); + printf("Maximum DQS to DQ Skew (tDQSQ)\t\t\t %d (ns*100)\n", record[44]); + printf("Maximum Read Data Hold Skew (tQHS)\t\t %d (ns*100)\n", record[45]); + + printf("\n---=== Manufacturing Information ===---\n"); + + printf("Manufacturer JEDEC ID\t\t\t\t"); + for (i = 64; i < 72; i++) { + printf(" %02x", record[i]); + } + printf("\n"); + if (record[72]) { + printf("Manufacturing Location Code\t\t\t 0x%02x\n", record[72]); + } + printf("Part Number\t\t\t\t\t "); + for (i = 73; i < 91; i++) { + if (record[i] >= 32 && record[i] < 127) { + printf("%c", record[i]); + } else { + printf("%d", record[i]); + } + } + printf("\n"); + printf("Manufacturing Date\t\t\t\t 20%d-W%d\n", record[93], record[94]); + printf("Assembly Serial Number\t\t\t\t 0x"); + for (i = 95; i < 99; i++) { + printf("%02X", record[i]); + } + printf("\n\n"); + + return 0; +} + +BAREBOX_CMD_START(decode) + .cmd = do_decode, +BAREBOX_CMD_END -- 2.1.4 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
