diff options
Diffstat (limited to 'arch/arm/mach-keystone/ddr3_spd.c')
-rw-r--r-- | arch/arm/mach-keystone/ddr3_spd.c | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/arch/arm/mach-keystone/ddr3_spd.c b/arch/arm/mach-keystone/ddr3_spd.c new file mode 100644 index 0000000..e5018c9 --- /dev/null +++ b/arch/arm/mach-keystone/ddr3_spd.c @@ -0,0 +1,453 @@ +/* + * 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_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; +} |