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u-boot/arch/arm/mach-keystone/ddr3_spd.c
Vitaly Andrianov 8efc243741 ARM: keystone2: use detected ddr3a size 
Because KS2 u-boot works in 32 bit address space the existing ram_size
global data field cannot be used. The maximum, which the get_ram_size()
can detect is 2GB only. The ft_board_setup() needs the actual ddr3 size
to fix up dtb.

This commit introduces the ddr3_get_size() which uses SPD data to
calculate the ddr3 size. This function replaces the "ddr3_size"
environment variable, which was used to get the SODIMM size.

For platforms, which don't have SODIMM with SPD and ddr3 is populated to
a board a simple ddr3_get_size function that returns ddr3 size has to be
implemented. See hardware-k2l.h

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-03-14 19:18:45 -04:00

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/*
* Keystone2: DDR3 SPD configuration
*
* (C) Copyright 2015-2016 Texas Instruments Incorporated, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <i2c.h>
#include <ddr_spd.h>
#include <asm/arch/ddr3.h>
#include <asm/arch/hardware.h>
#define DUMP_DDR_CONFIG 0 /* set to 1 to debug */
#define debug_ddr_cfg(fmt, args...) \
debug_cond(DUMP_DDR_CONFIG, fmt, ##args)
static void dump_phy_config(struct ddr3_phy_config *ptr)
{
debug_ddr_cfg("\npllcr 0x%08X\n", ptr->pllcr);
debug_ddr_cfg("pgcr1_mask 0x%08X\n", ptr->pgcr1_mask);
debug_ddr_cfg("pgcr1_val 0x%08X\n", ptr->pgcr1_val);
debug_ddr_cfg("ptr0 0x%08X\n", ptr->ptr0);
debug_ddr_cfg("ptr1 0x%08X\n", ptr->ptr1);
debug_ddr_cfg("ptr2 0x%08X\n", ptr->ptr2);
debug_ddr_cfg("ptr3 0x%08X\n", ptr->ptr3);
debug_ddr_cfg("ptr4 0x%08X\n", ptr->ptr4);
debug_ddr_cfg("dcr_mask 0x%08X\n", ptr->dcr_mask);
debug_ddr_cfg("dcr_val 0x%08X\n", ptr->dcr_val);
debug_ddr_cfg("dtpr0 0x%08X\n", ptr->dtpr0);
debug_ddr_cfg("dtpr1 0x%08X\n", ptr->dtpr1);
debug_ddr_cfg("dtpr2 0x%08X\n", ptr->dtpr2);
debug_ddr_cfg("mr0 0x%08X\n", ptr->mr0);
debug_ddr_cfg("mr1 0x%08X\n", ptr->mr1);
debug_ddr_cfg("mr2 0x%08X\n", ptr->mr2);
debug_ddr_cfg("dtcr 0x%08X\n", ptr->dtcr);
debug_ddr_cfg("pgcr2 0x%08X\n", ptr->pgcr2);
debug_ddr_cfg("zq0cr1 0x%08X\n", ptr->zq0cr1);
debug_ddr_cfg("zq1cr1 0x%08X\n", ptr->zq1cr1);
debug_ddr_cfg("zq2cr1 0x%08X\n", ptr->zq2cr1);
debug_ddr_cfg("pir_v1 0x%08X\n", ptr->pir_v1);
debug_ddr_cfg("pir_v2 0x%08X\n\n", ptr->pir_v2);
};
static void dump_emif_config(struct ddr3_emif_config *ptr)
{
debug_ddr_cfg("\nsdcfg 0x%08X\n", ptr->sdcfg);
debug_ddr_cfg("sdtim1 0x%08X\n", ptr->sdtim1);
debug_ddr_cfg("sdtim2 0x%08X\n", ptr->sdtim2);
debug_ddr_cfg("sdtim3 0x%08X\n", ptr->sdtim3);
debug_ddr_cfg("sdtim4 0x%08X\n", ptr->sdtim4);
debug_ddr_cfg("zqcfg 0x%08X\n", ptr->zqcfg);
debug_ddr_cfg("sdrfc 0x%08X\n\n", ptr->sdrfc);
};
#define TEMP NORMAL_TEMP
#define VBUS_CLKPERIOD 1.875 /* Corresponds to vbus=533MHz, */
#define PLLGS_VAL (4000.0 / VBUS_CLKPERIOD) /* 4 us */
#define PLLPD_VAL (1000.0 / VBUS_CLKPERIOD) /* 1 us */
#define PLLLOCK_VAL (100000.0 / VBUS_CLKPERIOD) /* 100 us */
#define PLLRST_VAL (9000.0 / VBUS_CLKPERIOD) /* 9 us */
#define PHYRST_VAL 0x10
#define DDR_TERM RZQ_4_TERM
#define SDRAM_DRIVE RZQ_7_IMP
#define DYN_ODT ODT_DISABLE
enum srt {
NORMAL_TEMP,
EXTENDED_TEMP
};
enum out_impedance {
RZQ_6_IMP = 0,
RZQ_7_IMP
};
enum die_term {
ODT_DISABLE = 0,
RZQ_4_TERM,
RZQ_2_TERM,
RZQ_6_TERM,
RZQ_12_TERM,
RZQ_8_TERM
};
struct ddr3_sodimm {
u32 t_ck;
u32 freqsel;
u32 t_xp;
u32 t_cke;
u32 t_pllpd;
u32 t_pllgs;
u32 t_phyrst;
u32 t_plllock;
u32 t_pllrst;
u32 t_rfc;
u32 t_xs;
u32 t_dinit0;
u32 t_dinit1;
u32 t_dinit2;
u32 t_dinit3;
u32 t_rtp;
u32 t_wtr;
u32 t_rp;
u32 t_rcd;
u32 t_ras;
u32 t_rrd;
u32 t_rc;
u32 t_faw;
u32 t_mrd;
u32 t_mod;
u32 t_wlo;
u32 t_wlmrd;
u32 t_xsdll;
u32 t_xpdll;
u32 t_ckesr;
u32 t_dllk;
u32 t_wr;
u32 t_wr_bin;
u32 cas;
u32 cwl;
u32 asr;
u32 pasr;
u32 t_refprd;
u8 sdram_type;
u8 ibank;
u8 pagesize;
u8 t_rrd2;
u8 t_ras_max;
u8 t_zqcs;
u32 refresh_rate;
u8 t_csta;
u8 rank;
u8 mirrored;
u8 buswidth;
};
static u8 cas_latancy(u16 temp)
{
int loop;
u8 cas_bin = 0;
for (loop = 0; loop < 32; loop += 2, temp >>= 1) {
if (temp & 0x0001)
cas_bin = (loop > 15) ? loop - 15 : loop;
}
return cas_bin;
}
static int ddr3_get_size_in_mb(ddr3_spd_eeprom_t *buf)
{
return (((buf->organization & 0x38) >> 3) + 1) *
(256 << (buf->density_banks & 0xf));
}
static int ddrtimingcalculation(ddr3_spd_eeprom_t *buf, struct ddr3_sodimm *spd,
struct ddr3_spd_cb *spd_cb)
{
u32 mtb, clk_freq;
if ((buf->mem_type != 0x0b) ||
((buf->density_banks & 0x70) != 0x00))
return 1;
spd->sdram_type = 0x03;
spd->ibank = 0x03;
mtb = buf->mtb_dividend * 1000 / buf->mtb_divisor;
spd->t_ck = buf->tck_min * mtb;
spd_cb->ddrspdclock = 2000000 / spd->t_ck;
clk_freq = spd_cb->ddrspdclock / 2;
spd->rank = ((buf->organization & 0x38) >> 3) + 1;
if (spd->rank > 2)
return 1;
spd->pagesize = (buf->addressing & 0x07) + 1;
if (spd->pagesize > 3)
return 1;
spd->buswidth = 8 << (buf->bus_width & 0x7);
if ((spd->buswidth < 16) || (spd->buswidth > 64))
return 1;
spd->mirrored = buf->mod_section.unbuffered.addr_mapping & 1;
printf("DDR3A Speed will be configured for %d Operation.\n",
spd_cb->ddrspdclock);
if (spd_cb->ddrspdclock == 1333) {
spd->t_xp = ((3 * spd->t_ck) > 6000) ?
3 : ((5999 / spd->t_ck) + 1);
spd->t_cke = ((3 * spd->t_ck) > 5625) ?
3 : ((5624 / spd->t_ck) + 1);
} else if (spd_cb->ddrspdclock == 1600) {
spd->t_xp = ((3 * spd->t_ck) > 6000) ?
3 : ((5999 / spd->t_ck) + 1);
spd->t_cke = ((3 * spd->t_ck) > 5000) ?
3 : ((4999 / spd->t_ck) + 1);
} else {
printf("Unsupported DDR3 speed %d\n", spd_cb->ddrspdclock);
return 1;
}
spd->t_xpdll = (spd->t_ck > 2400) ? 10 : 24000 / spd->t_ck;
spd->t_ckesr = spd->t_cke + 1;
/* SPD Calculated Values */
spd->cas = cas_latancy((buf->caslat_msb << 8) |
buf->caslat_lsb);
spd->t_wr = (buf->twr_min * mtb) / spd->t_ck;
spd->t_wr_bin = (spd->t_wr / 2) & 0x07;
spd->t_rcd = ((buf->trcd_min * mtb) - 1) / spd->t_ck + 1;
spd->t_rrd = ((buf->trrd_min * mtb) - 1) / spd->t_ck + 1;
spd->t_rp = (((buf->trp_min * mtb) - 1) / spd->t_ck) + 1;
spd->t_ras = (((buf->tras_trc_ext & 0x0f) << 8 | buf->tras_min_lsb) *
mtb) / spd->t_ck;
spd->t_rc = (((((buf->tras_trc_ext & 0xf0) << 4) | buf->trc_min_lsb) *
mtb) - 1) / spd->t_ck + 1;
spd->t_rfc = (buf->trfc_min_lsb | (buf->trfc_min_msb << 8)) * mtb /
1000;
spd->t_wtr = (buf->twtr_min * mtb) / spd->t_ck;
spd->t_rtp = (buf->trtp_min * mtb) / spd->t_ck;
spd->t_xs = (((spd->t_rfc + 10) * 1000) / spd->t_ck);
spd->t_rfc = ((spd->t_rfc * 1000) - 1) / spd->t_ck + 1;
spd->t_faw = (((buf->tfaw_msb << 8) | buf->tfaw_min) * mtb) / spd->t_ck;
spd->t_rrd2 = ((((buf->tfaw_msb << 8) |
buf->tfaw_min) * mtb) / (4 * spd->t_ck)) - 1;
/* Hard-coded values */
spd->t_mrd = 0x00;
spd->t_mod = 0x00;
spd->t_wlo = 0x0C;
spd->t_wlmrd = 0x28;
spd->t_xsdll = 0x200;
spd->t_ras_max = 0x0F;
spd->t_csta = 0x05;
spd->t_dllk = 0x200;
/* CAS Write Latency */
if (spd->t_ck >= 2500)
spd->cwl = 0;
else if (spd->t_ck >= 1875)
spd->cwl = 1;
else if (spd->t_ck >= 1500)
spd->cwl = 2;
else if (spd->t_ck >= 1250)
spd->cwl = 3;
else if (spd->t_ck >= 1071)
spd->cwl = 4;
else
spd->cwl = 5;
/* SD:RAM Thermal and Refresh Options */
spd->asr = (buf->therm_ref_opt & 0x04) >> 2;
spd->pasr = (buf->therm_ref_opt & 0x80) >> 7;
spd->t_zqcs = 64;
spd->t_refprd = (TEMP == NORMAL_TEMP) ? 7812500 : 3906250;
spd->t_refprd = spd->t_refprd / spd->t_ck;
spd->refresh_rate = spd->t_refprd;
spd->t_refprd = spd->t_refprd * 5;
/* Set MISC PHY space registers fields */
if ((clk_freq / 2) >= 166 && (clk_freq / 2 < 275))
spd->freqsel = 0x03;
else if ((clk_freq / 2) > 225 && (clk_freq / 2 < 385))
spd->freqsel = 0x01;
else if ((clk_freq / 2) > 335 && (clk_freq / 2 < 534))
spd->freqsel = 0x00;
spd->t_dinit0 = 500000000 / spd->t_ck; /* CKE low time 500 us */
spd->t_dinit1 = spd->t_xs;
spd->t_dinit2 = 200000000 / spd->t_ck; /* Reset low time 200 us */
/* Time from ZQ initialization command to first command (1 us) */
spd->t_dinit3 = 1000000 / spd->t_ck;
spd->t_pllgs = PLLGS_VAL + 1;
spd->t_pllpd = PLLPD_VAL + 1;
spd->t_plllock = PLLLOCK_VAL + 1;
spd->t_pllrst = PLLRST_VAL;
spd->t_phyrst = PHYRST_VAL;
spd_cb->ddr_size_gbyte = ddr3_get_size_in_mb(buf) / 1024;
return 0;
}
static void init_ddr3param(struct ddr3_spd_cb *spd_cb,
struct ddr3_sodimm *spd)
{
spd_cb->phy_cfg.pllcr = (spd->freqsel & 3) << 18 | 0xE << 13;
spd_cb->phy_cfg.pgcr1_mask = (IODDRM_MASK | ZCKSEL_MASK);
spd_cb->phy_cfg.pgcr1_val = ((1 << 2) | (1 << 7) | (1 << 23));
spd_cb->phy_cfg.ptr0 = ((spd->t_pllpd & 0x7ff) << 21) |
((spd->t_pllgs & 0x7fff) << 6) | (spd->t_phyrst & 0x3f);
spd_cb->phy_cfg.ptr1 = ((spd->t_plllock & 0xffff) << 16) |
(spd->t_pllrst & 0x1fff);
spd_cb->phy_cfg.ptr2 = 0;
spd_cb->phy_cfg.ptr3 = ((spd->t_dinit1 & 0x1ff) << 20) |
(spd->t_dinit0 & 0xfffff);
spd_cb->phy_cfg.ptr4 = ((spd->t_dinit3 & 0x3ff) << 18) |
(spd->t_dinit2 & 0x3ffff);
spd_cb->phy_cfg.dcr_mask = PDQ_MASK | MPRDQ_MASK | BYTEMASK_MASK;
spd_cb->phy_cfg.dcr_val = 1 << 10;
if (spd->mirrored) {
spd_cb->phy_cfg.dcr_mask |= NOSRA_MASK | UDIMM_MASK;
spd_cb->phy_cfg.dcr_val |= (1 << 27) | (1 << 29);
}
spd_cb->phy_cfg.dtpr0 = (spd->t_rc & 0x3f) << 26 |
(spd->t_rrd & 0xf) << 22 |
(spd->t_ras & 0x3f) << 16 | (spd->t_rcd & 0xf) << 12 |
(spd->t_rp & 0xf) << 8 | (spd->t_wtr & 0xf) << 4 |
(spd->t_rtp & 0xf);
spd_cb->phy_cfg.dtpr1 = (spd->t_wlo & 0xf) << 26 |
(spd->t_wlmrd & 0x3f) << 20 | (spd->t_rfc & 0x1ff) << 11 |
(spd->t_faw & 0x3f) << 5 | (spd->t_mod & 0x7) << 2 |
(spd->t_mrd & 0x3);
spd_cb->phy_cfg.dtpr2 = 0 << 31 | 1 << 30 | 0 << 29 |
(spd->t_dllk & 0x3ff) << 19 | (spd->t_ckesr & 0xf) << 15;
spd_cb->phy_cfg.dtpr2 |= (((spd->t_xp > spd->t_xpdll) ?
spd->t_xp : spd->t_xpdll) &
0x1f) << 10;
spd_cb->phy_cfg.dtpr2 |= (((spd->t_xs > spd->t_xsdll) ?
spd->t_xs : spd->t_xsdll) &
0x3ff);
spd_cb->phy_cfg.mr0 = 1 << 12 | (spd->t_wr_bin & 0x7) << 9 | 0 << 8 |
0 << 7 | ((spd->cas & 0x0E) >> 1) << 4 | 0 << 3 |
(spd->cas & 0x01) << 2;
spd_cb->phy_cfg.mr1 = 0 << 12 | 0 << 11 | 0 << 7 | 0 << 3 |
((DDR_TERM >> 2) & 1) << 9 | ((DDR_TERM >> 1) & 1) << 6 |
(DDR_TERM & 0x1) << 2 | ((SDRAM_DRIVE >> 1) & 1) << 5 |
(SDRAM_DRIVE & 1) << 1 | 0 << 0;
spd_cb->phy_cfg.mr2 = DYN_ODT << 9 | TEMP << 7 | (spd->asr & 1) << 6 |
(spd->cwl & 7) << 3 | (spd->pasr & 7);
spd_cb->phy_cfg.dtcr = (spd->rank == 2) ? 0x730035C7 : 0x710035C7;
spd_cb->phy_cfg.pgcr2 = (0xF << 20) | ((int)spd->t_refprd & 0x3ffff);
spd_cb->phy_cfg.zq0cr1 = 0x0000005D;
spd_cb->phy_cfg.zq1cr1 = 0x0000005B;
spd_cb->phy_cfg.zq2cr1 = 0x0000005B;
spd_cb->phy_cfg.pir_v1 = 0x00000033;
spd_cb->phy_cfg.pir_v2 = 0x0000FF81;
/* EMIF Registers */
spd_cb->emif_cfg.sdcfg = spd->sdram_type << 29 | (DDR_TERM & 7) << 25 |
(DYN_ODT & 3) << 22 | (spd->cwl & 0x7) << 14 |
(spd->cas & 0xf) << 8 | (spd->ibank & 3) << 5 |
(spd->buswidth & 3) << 12 | (spd->pagesize & 3);
if (spd->rank == 2)
spd_cb->emif_cfg.sdcfg |= 1 << 3;
spd_cb->emif_cfg.sdtim1 = ((spd->t_wr - 1) & 0x1f) << 25 |
((spd->t_ras - 1) & 0x7f) << 18 |
((spd->t_rc - 1) & 0xff) << 10 |
(spd->t_rrd2 & 0x3f) << 4 |
((spd->t_wtr - 1) & 0xf);
spd_cb->emif_cfg.sdtim2 = 0x07 << 10 | ((spd->t_rp - 1) & 0x1f) << 5 |
((spd->t_rcd - 1) & 0x1f);
spd_cb->emif_cfg.sdtim3 = ((spd->t_xp - 2) & 0xf) << 28 |
((spd->t_xs - 1) & 0x3ff) << 18 |
((spd->t_xsdll - 1) & 0x3ff) << 8 |
((spd->t_rtp - 1) & 0xf) << 4 | ((spd->t_cke) & 0xf);
spd_cb->emif_cfg.sdtim4 = (spd->t_csta & 0xf) << 28 |
((spd->t_ckesr - 1) & 0xf) << 24 |
((spd->t_zqcs - 1) & 0xff) << 16 |
((spd->t_rfc - 1) & 0x3ff) << 4 |
(spd->t_ras_max & 0xf);
spd_cb->emif_cfg.sdrfc = (spd->refresh_rate - 1) & 0xffff;
/* TODO zqcfg value fixed ,May be required correction for K2E evm. */
spd_cb->emif_cfg.zqcfg = (spd->rank == 2) ? 0xF0073200 : 0x70073200;
}
static int ddr3_read_spd(ddr3_spd_eeprom_t *spd_params)
{
int ret;
int old_bus;
i2c_init(CONFIG_SYS_DAVINCI_I2C_SPEED, CONFIG_SYS_DAVINCI_I2C_SLAVE);
old_bus = i2c_get_bus_num();
i2c_set_bus_num(1);
ret = i2c_read(0x53, 0, 1, (unsigned char *)spd_params, 256);
i2c_set_bus_num(old_bus);
if (ret) {
printf("Cannot read DIMM params\n");
return 1;
}
if (ddr3_spd_check(spd_params))
return 1;
return 0;
}
int ddr3_get_size(void)
{
ddr3_spd_eeprom_t spd_params;
if (ddr3_read_spd(&spd_params))
return 0;
return ddr3_get_size_in_mb(&spd_params) / 1024;
}
int ddr3_get_dimm_params_from_spd(struct ddr3_spd_cb *spd_cb)
{
struct ddr3_sodimm spd;
ddr3_spd_eeprom_t spd_params;
memset(&spd, 0, sizeof(spd));
if (ddr3_read_spd(&spd_params))
return 1;
if (ddrtimingcalculation(&spd_params, &spd, spd_cb)) {
printf("Timing caclulation error\n");
return 1;
}
strncpy(spd_cb->dimm_name, (char *)spd_params.mpart, 18);
spd_cb->dimm_name[18] = '\0';
init_ddr3param(spd_cb, &spd);
dump_emif_config(&spd_cb->emif_cfg);
dump_phy_config(&spd_cb->phy_cfg);
return 0;
}
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