[RFC V3 2/3] ddr_spd: add routune for printing SPD contents in human readable format

[Alexander Smirnov <alllecs@yandex.ru>]

Signed-off-by: Alexander Smirnov <alllecs@yandex.ru>
---
 common/ddr_spd.c  | 239 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 include/ddr_spd.h |   1 +
 2 files changed, 240 insertions(+)

diff --git a/common/ddr_spd.c b/common/ddr_spd.c
index ea0b529..380ea18 100644
--- a/common/ddr_spd.c
+++ b/common/ddr_spd.c
@@ -61,3 +61,242 @@ uint32_t ddr3_spd_checksum_pass(const struct ddr3_spd_eeprom_s *spd)
 
 	return 0;
 }
+
+static char *heights[] = {
+	"<25.4",
+	"25.4",
+	"25.4 - 30.0",
+	"30.0",
+	"30.5",
+	"> 30.5"
+};
+
+static char *sdram_voltage_interface_level[] = {
+	"TTL (5V tolerant)",
+	"LVTTL (not 5V tolerant)",
+	"HSTL 1.5V",
+	"SSTL 3.3V",
+	"SSTL 2.5V",
+	"SSTL 1.8V"
+};
+
+static 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)"
+};
+
+static char *refresh[] = {
+	"15.625",
+	"3.9",
+	"7.8",
+	"31.3",
+	"62.5",
+	"125"
+};
+
+static 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"
+};
+
+static int funct(uint8_t addr)
+{
+	int t;
+
+	t = ((addr >> 4) * 10 + (addr & 0xf));
+
+	return t;
+}
+
+static int des(uint8_t byte)
+{
+	int k;
+
+	k = (byte & 0x3) * 10 / 4;
+
+	return k;
+}
+
+static int integ(uint8_t byte)
+{
+	int k;
+
+	k = (byte >> 2);
+
+	return k;
+}
+
+static 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;
+}
+
+void ddr_spd_print(uint8_t *record)
+{
+	int highestCAS = 0;
+	int cas[256];
+	int i, i_i, k, x, y;
+	int ddrclk, tbits, pcclk;
+	int trcd, trp, tras;
+	int ctime;
+	uint8_t parity;
+	char *ref;
+	struct ddr2_spd_eeprom_s *s = (struct ddr2_spd_eeprom_s *)record;
+
+	ctime = ddr2_sdram_ctime(s->clk_cycle);
+	ddrclk = 2 * (1000 / ctime) * 100;
+	tbits = ((s->res_7) << 8) + (s->dataw);
+	if (((s->config) & 0x03) == 1)
+		tbits = tbits - 8;
+
+	pcclk = ddrclk * tbits / 8;
+	pcclk = pcclk - (pcclk % 100);
+	i_i = ((s->nrow_addr) & 0x0f) + ((s->ncol_addr) & 0x0f) - 17;
+	k = (((s->mod_ranks) & 0x7) + 1) * (s->nbanks);
+	trcd = (((s->trcd) >> 2) + (((s->trcd) & 3) * 0.25)) / ctime * 100;
+	trp = (((s->trp) >> 2) + (((s->trp) & 3) * 0.25)) / ctime * 100;
+	tras = (s->tras) * 100 / ctime ;
+	x = (int)(ctime / 100);
+	y = (ctime - (int)((ctime / 100) * 100)) / 10;
+
+	for (i_i = 2; i_i < 7; i_i++) {
+		if ((s->cas_lat) & (1 << i_i)) {
+			highestCAS = i_i;
+			cas[highestCAS]++;
+		}
+	}
+	printf("---=== SPD EEPROM Information ===---\n");
+	printf("%-50s OK (0x%0X)\n", "EEPROM Checksum of bytes 0-62", s->cksum);
+	printf("%-50s %d\n", "# of bytes written to SDRAM EEPROM", s->info_size);
+	printf("%-50s %d\n", "Total number of bytes in EEPROM", 1 << (s->chip_size));
+
+	if ((s->mem_type) < 11)
+		printf("%-50s %s\n", "Fundamental Memory type", type_list[(s->mem_type)]);
+	else
+		printf("%-50s (%02x)\n", "Warning: unknown memory type", s->mem_type);
+
+	printf("%-50s %x.%x\n", "SPD Revision", (s->spd_rev) >> 4, (s->spd_rev) & 0x0f);
+
+	printf("\n---=== Memory Characteristics ===---\n");
+	printf("%-50s %d MHz (PC2-%d)\n", "Maximum module speed", ddrclk, pcclk);
+	if (i_i > 0 && i_i <= 12 && k > 0)
+		printf("%-50s %d MB\n", "Size", ((1 << i_i) * k));
+	else
+		printf("%-50s INVALID: %02x %02x %02x %02x\n", "Size", s->nrow_addr, s->ncol_addr, s->mod_ranks, s->nbanks);
+
+	printf("%-50s %d x %d x %d x %d\n", "Banks x Rows x Columns x Bits", s->nbanks, s->nrow_addr, s->ncol_addr, s->dataw);
+	printf("%-50s %d\n", "Ranks", ((s->mod_ranks) & 0x7) + 1);
+	printf("%-50s %d bits\n", "SDRAM Device Width", (s->primw));
+
+	if (((s->mod_ranks) >> 5) < 7)
+		printf("%-50s %s mm\n", "Module Height", heights[((s->mod_ranks) >> 5)]);
+	else
+		printf("Error height\n");
+
+	printf("%-50s %s\n", "Module Type", ddr2_module_types[fls(s->dimm_type) - 1]);
+	printf("%-50s ", "DRAM Package ");
+	if (((s->mod_ranks) & 0x10) == 1)
+		printf("Stack\n");
+	else
+		printf("Planar\n");
+	if ((s->voltage) < 7)
+		printf("%-50s %s\n", "Voltage Interface Level", sdram_voltage_interface_level[s->voltage]);
+	else
+		printf("Error Voltage Interface Level\n");
+
+	printf("%-50s ", "Module Configuration Type ");
+
+	parity = (s->config) & 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 (((s->refresh) >> 7) == 1)
+		ref = "- Self Refresh";
+	else
+		ref = " ";
+
+	printf("%-50s Reduced (%s us) %s\n", "Refresh Rate", refresh[(s->refresh) & 0x7f], ref);
+	printf("%-50s %d, %d\n", "Supported Burst Lengths", (s->burstl) & 4, (s->burstl) & 8);
+
+	printf("%-50s %dT\n", "Supported CAS Latencies (tCL)", highestCAS);
+	printf("%-50s %d-%d-%d-%d as DDR2-%d\n", "tCL-tRCD-tRP-tRAS", highestCAS, trcd, trp, tras, ddrclk);
+	printf("%-50s %d.%d ns at CAS %d\n", "Minimum Cycle Time", x, y, highestCAS);
+	printf("%-50s 0.%d%d ns at CAS %d\n", "Maximum Access Time", ((s->clk_access) >> 4), ((s->clk_access) & 0xf), highestCAS);
+	printf("%-50s %d ns\n", "Maximum Cycle Time (tCK max)", ((s->tckmax) >> 4) + ((s->tckmax) & 0x0f));
+printf("\n---=== Timing Parameters ===---\n");
+	printf("%-50s 0.%d ns\n", "Address/Command Setup Time Before Clock (tIS)", (funct(s->ca_setup)));
+	printf("%-50s 0.%d ns\n", "Address/Command Hold Time After Clock (tIH)", (funct(s->ca_hold)));
+	printf("%-50s 0.%d%d ns\n", "Data Input Setup Time Before Strobe (tDS)", ((s->data_setup) >> 4), ((s->data_setup) & 0xf));
+	printf("%-50s 0.%d%d ns\n", "Data Input Hold Time After Strobe (tDH)", ((s->data_hold) >> 4), ((s->data_hold) & 0xf));
+
+	printf("%-50s %d.%d ns\n", "Minimum Row Precharge Delay (tRP)", integ(s->trp), des(s->trp));
+	printf("%-50s %d.%d ns\n", "Minimum Row Active to Row Active Delay (tRRD)", integ(s->trrd), des(s->trrd));
+	printf("%-50s %d.%d ns\n", "Minimum RAS# to CAS# Delay (tRCD)", integ(s->trcd), des(s->trcd));
+	printf("%-50s %d ns\n", "Minimum RAS# Pulse Width (tRAS)", (((s->tras) & 0xfc) + ((s->tras) & 0x3)));
+	printf("%-50s %d.%d ns\n", "Write Recovery Time (tWR)", integ(s->twr), des(s->twr));
+	printf("%-50s %d.%d ns\n", "Minimum Write to Read CMD Delay (tWTR)", integ(s->twtr), des(s->twtr));
+	printf("%-50s %d.%d ns\n", "Minimum Read to Pre-charge CMD Delay (tRTP)", integ(s->trtp), des(s->trtp));
+	printf("%-50s %d ns\n", "Minimum Active to Auto-refresh Delay (tRC)", s->trc);
+	printf("%-50s %d ns\n", "Minimum Recovery Delay (tRFC)", s->trfc);
+	printf("%-50s 0.%d ns\n", "Maximum DQS to DQ Skew (tDQSQ)", s->tdqsq);
+	printf("%-50s 0.%d ns\n", "Maximum Read Data Hold Skew (tQHS)", s->tqhs);
+
+	printf("\n---=== Manufacturing Information ===---\n");
+
+	printf("%-50s", "Manufacturer JEDEC ID");
+	for (i = 64; i < 72; i++)
+		printf(" %02x", record[i]);
+
+	printf("\n");
+	if (s->mloc)
+		printf("%-50s 0x%02x\n", "Manufacturing Location Code", s->mloc);
+
+	printf("%-50s ", "Part Number");
+	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("%-50s 20%d-W%d\n", "Manufacturing Date", record[93], record[94]);
+	printf("%-50s 0x", "Assembly Serial Number");
+	for (i = 95; i < 99; i++)
+		printf("%02X", record[i]);
+}
diff --git a/include/ddr_spd.h b/include/ddr_spd.h
index fc03bac..01fe73c 100644
--- a/include/ddr_spd.h
+++ b/include/ddr_spd.h
@@ -228,6 +228,7 @@ struct ddr3_spd_eeprom_s {
 	uint8_t cust[80];        /* 176-255 Open for Customer Use */
 };
 
+extern void ddr_spd_print(uint8_t *record);
 extern uint32_t ddr3_spd_checksum_pass(const struct ddr3_spd_eeprom_s *spd);
 extern uint32_t ddr2_spd_checksum_pass(const struct ddr2_spd_eeprom_s *spd);
 
-- 
2.1.4


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