Add functions for configuring MMDC iomux and configuration based on board-specific configurations.
Signed-off-by: Tim Harvey tharvey@gateworks.com --- v2: - split out mmdc and iomux structs into separate patch --- arch/arm/cpu/armv7/mx6/Makefile | 1 + arch/arm/cpu/armv7/mx6/ddr.c | 469 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 470 insertions(+) create mode 100644 arch/arm/cpu/armv7/mx6/ddr.c
diff --git a/arch/arm/cpu/armv7/mx6/Makefile b/arch/arm/cpu/armv7/mx6/Makefile index d7285fc..6dc9f8e 100644 --- a/arch/arm/cpu/armv7/mx6/Makefile +++ b/arch/arm/cpu/armv7/mx6/Makefile @@ -8,4 +8,5 @@ #
obj-y := soc.o clock.o +obj-$(CONFIG_SPL_BUILD) += ddr.o obj-$(CONFIG_SECURE_BOOT) += hab.o diff --git a/arch/arm/cpu/armv7/mx6/ddr.c b/arch/arm/cpu/armv7/mx6/ddr.c new file mode 100644 index 0000000..1536418 --- /dev/null +++ b/arch/arm/cpu/armv7/mx6/ddr.c @@ -0,0 +1,469 @@ +/* + * Copyright (C) 2014 Gateworks Corporation + * Author: Tim Harvey tharvey@gateworks.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <linux/types.h> +#include <asm/arch/mx6-ddr.h> +#include <asm/arch/sys_proto.h> +#include <asm/io.h> +#include <asm/types.h> + +/* Configure MX6DQ mmdc iomux */ +void mx6dq_dram_iocfg(unsigned width, + const struct mx6dq_iomux_ddr_regs *ddr, + const struct mx6dq_iomux_grp_regs *grp) +{ + volatile struct mx6dq_iomux_ddr_regs *mx6_ddr_iomux; + volatile struct mx6dq_iomux_grp_regs *mx6_grp_iomux; + + mx6_ddr_iomux = (struct mx6dq_iomux_ddr_regs *)MX6DQ_IOM_DDR_BASE; + mx6_grp_iomux = (struct mx6dq_iomux_grp_regs *)MX6DQ_IOM_GRP_BASE; + + /* DDR IO Type */ + mx6_grp_iomux->grp_ddr_type = grp->grp_ddr_type; + mx6_grp_iomux->grp_ddrpke = grp->grp_ddrpke; + + /* Clock */ + mx6_ddr_iomux->dram_sdclk_0 = ddr->dram_sdclk_0; + mx6_ddr_iomux->dram_sdclk_1 = ddr->dram_sdclk_1; + + /* Address */ + mx6_ddr_iomux->dram_cas = ddr->dram_cas; + mx6_ddr_iomux->dram_ras = ddr->dram_ras; + mx6_grp_iomux->grp_addds = grp->grp_addds; + + /* Control */ + mx6_ddr_iomux->dram_reset = ddr->dram_reset; + mx6_ddr_iomux->dram_sdcke0 = ddr->dram_sdcke0; + mx6_ddr_iomux->dram_sdcke1 = ddr->dram_sdcke1; + mx6_ddr_iomux->dram_sdba2 = ddr->dram_sdba2; + mx6_ddr_iomux->dram_sdodt0 = ddr->dram_sdodt0; + mx6_ddr_iomux->dram_sdodt1 = ddr->dram_sdodt1; + mx6_grp_iomux->grp_ctlds = grp->grp_ctlds; + + /* Data Strobes */ + mx6_grp_iomux->grp_ddrmode_ctl = grp->grp_ddrmode_ctl; + mx6_ddr_iomux->dram_sdqs0 = ddr->dram_sdqs0; + mx6_ddr_iomux->dram_sdqs1 = ddr->dram_sdqs1; + if (width >= 32) { + mx6_ddr_iomux->dram_sdqs2 = ddr->dram_sdqs2; + mx6_ddr_iomux->dram_sdqs3 = ddr->dram_sdqs3; + } + if (width >= 64) { + mx6_ddr_iomux->dram_sdqs4 = ddr->dram_sdqs4; + mx6_ddr_iomux->dram_sdqs5 = ddr->dram_sdqs5; + mx6_ddr_iomux->dram_sdqs6 = ddr->dram_sdqs6; + mx6_ddr_iomux->dram_sdqs7 = ddr->dram_sdqs7; + } + + /* Data */ + mx6_grp_iomux->grp_ddrmode = grp->grp_ddrmode; + mx6_grp_iomux->grp_b0ds = grp->grp_b0ds; + mx6_grp_iomux->grp_b1ds = grp->grp_b1ds; + if (width >= 32) { + mx6_grp_iomux->grp_b2ds = grp->grp_b2ds; + mx6_grp_iomux->grp_b3ds = grp->grp_b3ds; + } + if (width >= 64) { + mx6_grp_iomux->grp_b4ds = grp->grp_b4ds; + mx6_grp_iomux->grp_b5ds = grp->grp_b5ds; + mx6_grp_iomux->grp_b6ds = grp->grp_b6ds; + mx6_grp_iomux->grp_b7ds = grp->grp_b7ds; + } + mx6_ddr_iomux->dram_dqm0 = ddr->dram_dqm0; + mx6_ddr_iomux->dram_dqm1 = ddr->dram_dqm1; + if (width >= 32) { + mx6_ddr_iomux->dram_dqm2 = ddr->dram_dqm2; + mx6_ddr_iomux->dram_dqm3 = ddr->dram_dqm3; + } + if (width >= 64) { + mx6_ddr_iomux->dram_dqm4 = ddr->dram_dqm4; + mx6_ddr_iomux->dram_dqm5 = ddr->dram_dqm5; + mx6_ddr_iomux->dram_dqm6 = ddr->dram_dqm6; + mx6_ddr_iomux->dram_dqm7 = ddr->dram_dqm7; + } +} + +/* Configure MX6SDL mmdc iomux */ +void mx6sdl_dram_iocfg(unsigned width, + const struct mx6sdl_iomux_ddr_regs *ddr, + const struct mx6sdl_iomux_grp_regs *grp) +{ + volatile struct mx6sdl_iomux_ddr_regs *mx6_ddr_iomux; + volatile struct mx6sdl_iomux_grp_regs *mx6_grp_iomux; + + mx6_ddr_iomux = (struct mx6sdl_iomux_ddr_regs *)MX6SDL_IOM_DDR_BASE; + mx6_grp_iomux = (struct mx6sdl_iomux_grp_regs *)MX6SDL_IOM_GRP_BASE; + + /* DDR IO Type */ + mx6_grp_iomux->grp_ddr_type = grp->grp_ddr_type; + mx6_grp_iomux->grp_ddrpke = grp->grp_ddrpke; + + /* Clock */ + mx6_ddr_iomux->dram_sdclk_0 = ddr->dram_sdclk_0; + mx6_ddr_iomux->dram_sdclk_1 = ddr->dram_sdclk_1; + + /* Address */ + mx6_ddr_iomux->dram_cas = ddr->dram_cas; + mx6_ddr_iomux->dram_ras = ddr->dram_ras; + mx6_grp_iomux->grp_addds = grp->grp_addds; + + /* Control */ + mx6_ddr_iomux->dram_reset = ddr->dram_reset; + mx6_ddr_iomux->dram_sdcke0 = ddr->dram_sdcke0; + mx6_ddr_iomux->dram_sdcke1 = ddr->dram_sdcke1; + mx6_ddr_iomux->dram_sdba2 = ddr->dram_sdba2; + mx6_ddr_iomux->dram_sdodt0 = ddr->dram_sdodt0; + mx6_ddr_iomux->dram_sdodt1 = ddr->dram_sdodt1; + mx6_grp_iomux->grp_ctlds = grp->grp_ctlds; + + /* Data Strobes */ + mx6_grp_iomux->grp_ddrmode_ctl = grp->grp_ddrmode_ctl; + mx6_ddr_iomux->dram_sdqs0 = ddr->dram_sdqs0; + mx6_ddr_iomux->dram_sdqs1 = ddr->dram_sdqs1; + if (width >= 32) { + mx6_ddr_iomux->dram_sdqs2 = ddr->dram_sdqs2; + mx6_ddr_iomux->dram_sdqs3 = ddr->dram_sdqs3; + } + if (width >= 64) { + mx6_ddr_iomux->dram_sdqs4 = ddr->dram_sdqs4; + mx6_ddr_iomux->dram_sdqs5 = ddr->dram_sdqs5; + mx6_ddr_iomux->dram_sdqs6 = ddr->dram_sdqs6; + mx6_ddr_iomux->dram_sdqs7 = ddr->dram_sdqs7; + } + + /* Data */ + mx6_grp_iomux->grp_ddrmode = grp->grp_ddrmode; + mx6_grp_iomux->grp_b0ds = grp->grp_b0ds; + mx6_grp_iomux->grp_b1ds = grp->grp_b1ds; + if (width >= 32) { + mx6_grp_iomux->grp_b2ds = grp->grp_b2ds; + mx6_grp_iomux->grp_b3ds = grp->grp_b3ds; + } + if (width >= 64) { + mx6_grp_iomux->grp_b4ds = grp->grp_b4ds; + mx6_grp_iomux->grp_b5ds = grp->grp_b5ds; + mx6_grp_iomux->grp_b6ds = grp->grp_b6ds; + mx6_grp_iomux->grp_b7ds = grp->grp_b7ds; + } + mx6_ddr_iomux->dram_dqm0 = ddr->dram_dqm0; + mx6_ddr_iomux->dram_dqm1 = ddr->dram_dqm1; + if (width >= 32) { + mx6_ddr_iomux->dram_dqm2 = ddr->dram_dqm2; + mx6_ddr_iomux->dram_dqm3 = ddr->dram_dqm3; + } + if (width >= 64) { + mx6_ddr_iomux->dram_dqm4 = ddr->dram_dqm4; + mx6_ddr_iomux->dram_dqm5 = ddr->dram_dqm5; + mx6_ddr_iomux->dram_dqm6 = ddr->dram_dqm6; + mx6_ddr_iomux->dram_dqm7 = ddr->dram_dqm7; + } +} + +/* + * Configure mx6 mmdc registers based on: + * - board-specific memory configuration + * - board-specific calibration data + * - ddr3 chip details + * + * The various calculations here are derived from the Freescale + * i.Mx6DQSDL DDR3 Script Aid spreadsheet (DOC-94917) designed to generate MMDC + * configuration registers based on memory system and memory chip parameters. + * + * The defaults here are those which were specified in the spreadsheet. + * For details on each register, refer to the IMX6DQRM and/or IMX6SDLRM + */ +#define MR(val, ba, cmd, cs1) \ + ((val << 16) | (1 << 15) | (cmd << 4) | (cs1 << 3) | ba) +void mx6_dram_cfg(const struct mx6_ddr_sysinfo *i, + const struct mx6_mmdc_calibration *c, + const struct mx6_ddr3_cfg *m) +{ + volatile struct mmdc_p_regs *mmdc0; + volatile struct mmdc_p_regs *mmdc1; + u32 reg; + u8 tcke, tcksrx, tcksre, txpdll, taofpd, taonpd, trrd; + u8 todtlon, taxpd, tanpd, tcwl, txp, tfaw, tcl; + u8 todt_idle_off = 0x4; /* from DDR3 Script Aid spreadsheet */ + u16 trcd, trc, tras, twr, tmrd, trtp, trp, twtr, trfc, txs, txpr; + u16 CS0_END; + u16 tdllk = 0x1ff; /* DLL locking time: 512 cycles (JEDEC DDR3) */ + int clkper; /* clock period in picoseconds */ + int clock; /* clock freq in mHz */ + int cs; + + mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR; + mmdc1 = (struct mmdc_p_regs *)MMDC_P1_BASE_ADDR; + + /* MX6D/MX6Q: 1066 MHz memory clock, clkper = 1.894ns = 1894ps */ + if (is_cpu_type(MXC_CPU_MX6Q)) { + clock = 528; + tcwl = 4; + } + /* MX6S/MX6DL: 800 MHz memory clock, clkper = 2.5ns = 2500ps */ + else { + clock = 400; + tcwl = 3; + } + clkper = (1000*1000)/clock; /* ps */ + todtlon = tcwl; + taxpd = tcwl; + tanpd = tcwl; + tcwl = tcwl; + + switch (m->density) { + case 1: /* 1Gb per chip */ + trfc = DIV_ROUND_UP(110000, clkper) - 1; + txs = DIV_ROUND_UP(120000, clkper) - 1; + break; + case 2: /* 2Gb per chip */ + trfc = DIV_ROUND_UP(160000, clkper) - 1; + txs = DIV_ROUND_UP(170000, clkper) - 1; + break; + case 4: /* 4Gb per chip */ + trfc = DIV_ROUND_UP(260000, clkper) - 1; + txs = DIV_ROUND_UP(270000, clkper) - 1; + break; + case 8: /* 8Gb per chip */ + trfc = DIV_ROUND_UP(350000, clkper) - 1; + txs = DIV_ROUND_UP(360000, clkper) - 1; + break; + default: + /* invalid density */ + printf("invalid chip density\n"); + hang(); + break; + } + txpr = txs; + + switch (m->mem_speed) { + case 800: + txp = DIV_ROUND_UP(MAX(3*clkper, 7500), clkper) - 1; + tcke = DIV_ROUND_UP(MAX(3*clkper, 7500), clkper) - 1; + if (m->pagesz == 1) { + tfaw = DIV_ROUND_UP(40000, clkper) - 1; + trrd = DIV_ROUND_UP(MAX(4*clkper, 10000), clkper) - 1; + } else { + tfaw = DIV_ROUND_UP(50000, clkper) - 1; + trrd = DIV_ROUND_UP(MAX(4*clkper, 10000), clkper) - 1; + } + break; + case 1066: + txp = DIV_ROUND_UP(MAX(3*clkper, 7500), clkper) - 1; + tcke = DIV_ROUND_UP(MAX(3*clkper, 5625), clkper) - 1; + if (m->pagesz == 1) { + tfaw = DIV_ROUND_UP(37500, clkper) - 1; + trrd = DIV_ROUND_UP(MAX(4*clkper, 7500), clkper) - 1; + } else { + tfaw = DIV_ROUND_UP(50000, clkper) - 1; + trrd = DIV_ROUND_UP(MAX(4*clkper, 10000), clkper) - 1; + } + break; + case 1333: + txp = DIV_ROUND_UP(MAX(3*clkper, 6000), clkper) - 1; + tcke = DIV_ROUND_UP(MAX(3*clkper, 5625), clkper) - 1; + if (m->pagesz == 1) { + tfaw = DIV_ROUND_UP(30000, clkper) - 1; + trrd = DIV_ROUND_UP(MAX(4*clkper, 6000), clkper) - 1; + } else { + tfaw = DIV_ROUND_UP(45000, clkper) - 1; + trrd = DIV_ROUND_UP(MAX(4*clkper, 7500), clkper) - 1; + } + break; + case 1600: + txp = DIV_ROUND_UP(MAX(3*clkper, 6000), clkper) - 1; + tcke = DIV_ROUND_UP(MAX(3*clkper, 5000), clkper) - 1; + if (m->pagesz == 1) { + tfaw = DIV_ROUND_UP(30000, clkper) - 1; + trrd = DIV_ROUND_UP(MAX(4*clkper, 6000), clkper) - 1; + } else { + tfaw = DIV_ROUND_UP(40000, clkper) - 1; + trrd = DIV_ROUND_UP(MAX(4*clkper, 7500), clkper) - 1; + } + break; + default: + printf("invalid memory speed\n"); + hang(); + break; + } + txpdll = DIV_ROUND_UP(MAX(10*clkper, 24000), clkper) - 1; + tcl = DIV_ROUND_UP(m->trcd, clkper/10) - 3; + tcksre = DIV_ROUND_UP(MAX(5*clkper, 10000), clkper); + tcksrx = tcksre; + taonpd = DIV_ROUND_UP(2000, clkper) - 1; + taofpd = taonpd; + trp = DIV_ROUND_UP(m->trcd, clkper/10) - 1; + trcd = trp; + trc = DIV_ROUND_UP(m->trcmin, clkper/10) - 1; + tras = DIV_ROUND_UP(m->trasmin, clkper/10) - 1; + twr = DIV_ROUND_UP(15000, clkper) - 1; + tmrd = DIV_ROUND_UP(MAX(12*clkper, 15000), clkper) - 1; + twtr = ROUND(MAX(4*clkper, 7500)/clkper, 1) - 1; + trtp = twtr; + CS0_END = ((4*i->cs_density) <= 120) ? (4*i->cs_density)+7 : 127; + debug("density:%d Gb (%d Gb per chip)\n", i->cs_density, m->density); + debug("clock: %dMHz (%d ps)\n", clock, clkper); + debug("memspd:%d\n", m->mem_speed); + debug("tcke=%d\n", tcke); + debug("tcksrx=%d\n", tcksrx); + debug("tcksre=%d\n", tcksre); + debug("taofpd=%d\n", taofpd); + debug("taonpd=%d\n", taonpd); + debug("todtlon=%d\n", todtlon); + debug("tanpd=%d\n", tanpd); + debug("taxpd=%d\n", taxpd); + debug("trfc=%d\n", trfc); + debug("txs=%d\n", txs); + debug("txp=%d\n", txp); + debug("txpdll=%d\n", txpdll); + debug("tfaw=%d\n", tfaw); + debug("tcl=%d\n", tcl); + debug("trcd=%d\n", trcd); + debug("trp=%d\n", trp); + debug("trc=%d\n", trc); + debug("tras=%d\n", tras); + debug("twr=%d\n", twr); + debug("tmrd=%d\n", tmrd); + debug("tcwl=%d\n", tcwl); + debug("tdllk=%d\n", tdllk); + debug("trtp=%d\n", trtp); + debug("twtr=%d\n", twtr); + debug("trrd=%d\n", trrd); + debug("txpr=%d\n", txpr); + debug("CS0_END=%d\n", CS0_END); + debug("ncs=%d\n", i->ncs); + debug("Rtt_wr=%d\n", i->rtt_wr); + debug("Rtt_nom=%d\n", i->rtt_nom); + debug("SRT=%d\n", m->SRT); + debug("tcl=%d\n", tcl); + debug("twr=%d\n", twr); + + /* ZQ: enable both one-time & periodic (1ms) HW ZQ calibration */ + mmdc0->mpzqhwctrl = (u32)0xa1390003; + if (i->dsize > 1) + mmdc1->mpzqhwctrl = (u32)0xa1390003; + + /* + * board-specific configuration: + * These values are determined empirically and vary per board layout + * see: + * appnote, ddr3 spreadsheet + */ + mmdc0->mpwldectrl0 = c->p0_mpwldectrl0; + mmdc0->mpwldectrl1 = c->p0_mpwldectrl1; + mmdc0->mpdgctrl0 = c->p0_mpdgctrl0; + mmdc0->mpdgctrl1 = c->p0_mpdgctrl1; + mmdc0->mprddlctl = c->p0_mprddlctl; + mmdc0->mpwrdlctl = c->p0_mpwrdlctl; + if (i->dsize > 1) { + mmdc1->mpwldectrl0 = c->p1_mpwldectrl0; + mmdc1->mpwldectrl1 = c->p1_mpwldectrl1; + mmdc1->mpdgctrl0 = c->p1_mpdgctrl0; + mmdc1->mpdgctrl1 = c->p1_mpdgctrl1; + mmdc1->mprddlctl = c->p1_mprddlctl; + mmdc1->mpwrdlctl = c->p1_mpwrdlctl; + } + + /* Read data DQ Byte0-3 delay */ + mmdc0->mprddqby0dl = (u32)0x33333333; + mmdc0->mprddqby1dl = (u32)0x33333333; + if (i->dsize > 0) { + mmdc0->mprddqby2dl = (u32)0x33333333; + mmdc0->mprddqby3dl = (u32)0x33333333; + } + if (i->dsize > 1) { + mmdc1->mprddqby0dl = (u32)0x33333333; + mmdc1->mprddqby1dl = (u32)0x33333333; + mmdc1->mprddqby2dl = (u32)0x33333333; + mmdc1->mprddqby3dl = (u32)0x33333333; + } + + /* complete calibration by forced measurement */ + mmdc0->mpmur0 = (u32)0x00000800; + if (i->dsize > 1) + mmdc1->mpmur0 = (u32)0x00000800; + + /* MMDC init */ + reg = (tcke << 16) | (tcksrx << 3) | tcksre; + mmdc0->mdpdc = reg; + reg = (taofpd << 27) | (taonpd << 24) | (tanpd << 20) | (taxpd << 16) | + (todtlon << 12) | (todt_idle_off << 4); + mmdc0->mdotc = reg; + + /* Timing configuration */ + reg = (trfc << 24) | (txs << 16) | (txp << 13) | (txpdll << 9) | + (tfaw << 4) | tcl; + mmdc0->mdcfg0 = reg; + reg = (trcd << 29) | (trp << 26) | (trc << 21) | (tras << 16) | + (1 << 15) | /* trpa */ + (twr << 9) | (tmrd << 5) | tcwl; + mmdc0->mdcfg1 = reg; + reg = (tdllk << 16) | (trtp << 6) | (twtr << 3) | trrd; + mmdc0->mdcfg2 = reg; + reg = (i->cs1_mirror << 19) | (i->walat << 16) | (i->bi_on << 12) | + (i->mif3_mode << 9) | (i->ralat << 6); + mmdc0->mdmisc = reg; + + /* configuration request */ + mmdc0->mdscr = (u32)(1 << 15); /* config request */ + mmdc0->mdrwd = (u32)0x000026d2; + reg = (txpr << 16) | (i->sde_to_rst << 8) | (i->rst_to_cke << 0); + mmdc0->mdor = reg; + + /* addressing */ + mmdc0->mdasp = CS0_END; + reg = (1 << 31) | /* SDE_0 */ + ((i->ncs == 2) ? 1 : 0) << 30 | /* SDE_1 */ + (m->rowaddr - 11) << 24 | /* ROW */ + (m->coladdr - 9) << 20 | /* COL */ + (1 << 19) | /* Burst Length = 8 for DDR3 */ + (i->dsize << 16); /* DDR data bus size */ + mmdc0->mdctl = reg; + + /* Write Mode Registers to Init DDR3 devices */ + for (cs = 0; cs < i->ncs; cs++) { + /* MR2 */ + reg = (i->rtt_wr & 3) << 9 | (m->SRT & 1) << 7 | + ((tcwl - 3) & 3) << 3; + mmdc0->mdscr = (u32)MR(reg, 2, 3, cs); + /* MR3 */ + mmdc0->mdscr = (u32)MR(0, 3, 3, cs); + /* MR1 */ + reg = ((i->rtt_nom & 1) ? 1 : 0) << 2 | + ((i->rtt_nom & 2) ? 1 : 0) << 6; + mmdc0->mdscr = (u32)MR(reg, 1, 3, cs); + reg = ((tcl - 1) << 4) | /* CAS */ + (1 << 8) | /* DLL Reset */ + ((twr - 3) << 9); /* Write Recovery */ + /* MR0 */ + mmdc0->mdscr = (u32)MR(reg, 0, 3, cs); + /* ZQ calibration */ + reg = (1 << 10); + mmdc0->mdscr = (u32)MR(reg, 0, 4, cs); + } + + /* refresh control register */ + reg = (1 << 14) | /* REF_SEL: Periodic refresh cycles of 32kHz */ + (7 << 11); /* REFR: Refresh Rate - 8 refreshes */ + mmdc0->mdref = reg; + + /* MMDC Termination: rtt_nom:2 RZQ/2(120ohm), rtt_nom:1 RZQ/4(60ohm) */ + reg = (i->rtt_nom == 2) ? 0x00011117 : 0x00022227; + mmdc0->mpodtctrl = reg; + if (i->dsize > 1) + mmdc1->mpodtctrl = reg; + /* Power down control */ + reg = (tcke & 0x7) << 16 | + 5 << 12 | /* PWDT_1: 256 cycles */ + 5 << 8 | /* PWDT_0: 256 cycles */ + 1 << 6 | /* BOTH_CS_PD */ + (tcksrx & 0x7) << 3 | + (tcksre & 0x7); + mmdc0->mdpdc = reg; /* SDCTL power down enabled */ + mmdc0->mapsr = (u32)0x00011006; /* ADOPT power down enabled */ + mmdc0->mdscr = (u32)0x00000000; /* init complete */ +}