diff options
Diffstat (limited to 'arch/arm/mach-imx/mx6/ddr.c')
| -rw-r--r-- | arch/arm/mach-imx/mx6/ddr.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/mx6/ddr.c b/arch/arm/mach-imx/mx6/ddr.c index 4396880..69fe756 100644 --- a/arch/arm/mach-imx/mx6/ddr.c +++ b/arch/arm/mach-imx/mx6/ddr.c @@ -945,6 +945,27 @@ void mx6sdl_dram_iocfg(unsigned width, mmdc1->entry = value; \ } while (0) +/* see BOOT_CFG3 description Table 5-4. EIM Boot Fusemap */ +#define BOOT_CFG3_DDR_MASK 0x30 +#define BOOT_CFG3_EXT_DDR_MASK 0x33 + +#define DDR_MMAP_NOC_SINGLE 0 +#define DDR_MMAP_NOC_DUAL 0x31 + +/* NoC ACTIVATE shifts */ +#define NOC_RD_SHIFT 0 +#define NOC_FAW_PERIOD_SHIFT 4 +#define NOC_FAW_BANKS_SHIFT 10 + +/* NoC DdrTiming shifts */ +#define NOC_ACT_TO_ACT_SHIFT 0 +#define NOC_RD_TO_MISS_SHIFT 6 +#define NOC_WR_TO_MISS_SHIFT 12 +#define NOC_BURST_LEN_SHIFT 18 +#define NOC_RD_TO_WR_SHIFT 21 +#define NOC_WR_TO_RD_SHIFT 26 +#define NOC_BW_RATIO_SHIFT 31 + /* * According JESD209-2B-LPDDR2: Table 103 * WL: write latency @@ -1234,6 +1255,8 @@ void mx6_ddr3_cfg(const struct mx6_ddr_sysinfo *sysinfo, { volatile struct mmdc_p_regs *mmdc0; volatile struct mmdc_p_regs *mmdc1; + struct src *src_regs = (struct src *)SRC_BASE_ADDR; + u8 soc_boot_cfg3 = (readl(&src_regs->sbmr1) >> 16) & 0xff; u32 val; u8 tcke, tcksrx, tcksre, txpdll, taofpd, taonpd, trrd; u8 todtlon, taxpd, tanpd, tcwl, txp, tfaw, tcl; @@ -1526,6 +1549,79 @@ void mx6_ddr3_cfg(const struct mx6_ddr_sysinfo *sysinfo, /* Step 12: Configure and activate periodic refresh */ mmdc0->mdref = (sysinfo->refsel << 14) | (sysinfo->refr << 11); + /* + * Step 13: i.MX6DQP only: If the NoC scheduler is enabled, + * configure it and disable MMDC arbitration/reordering (see EB828) + */ + if (is_mx6dqp() && + ((soc_boot_cfg3 & BOOT_CFG3_DDR_MASK) == DDR_MMAP_NOC_SINGLE || + (soc_boot_cfg3 & BOOT_CFG3_EXT_DDR_MASK) == DDR_MMAP_NOC_DUAL)) { + struct mx6dqp_noc_sched_regs *noc_sched = + (struct mx6dqp_noc_sched_regs *)MX6DQP_NOC_SCHED_BASE; + + /* + * These values are fixed based on integration parameters and + * should not be modified + */ + noc_sched->rlat = 0x00000040; + noc_sched->ipu1 = 0x00000020; + noc_sched->ipu2 = 0x00000020; + + noc_sched->activate = (1 << NOC_FAW_BANKS_SHIFT) | + (tfaw << NOC_FAW_PERIOD_SHIFT) | + (trrd << NOC_RD_SHIFT); + noc_sched->ddrtiming = (((sysinfo->dsize == 1) ? 1 : 0) + << NOC_BW_RATIO_SHIFT) | + ((tcwl + twtr) << NOC_WR_TO_RD_SHIFT) | + ((tcl - tcwl + 2) << NOC_RD_TO_WR_SHIFT) | + (4 << NOC_BURST_LEN_SHIFT) | /* BL8 */ + ((tcwl + twr + trp + trcd) + << NOC_WR_TO_MISS_SHIFT) | + ((trtp + trp + trcd - 4) + << NOC_RD_TO_MISS_SHIFT) | + (trc << NOC_ACT_TO_ACT_SHIFT); + + if (sysinfo->dsize == 2) { + if (ddr3_cfg->coladdr == 10) { + if (ddr3_cfg->rowaddr == 15 && + sysinfo->ncs == 2) + noc_sched->ddrconf = 4; + else + noc_sched->ddrconf = 0; + } else if (ddr3_cfg->coladdr == 11) { + noc_sched->ddrconf = 1; + } + } else { + if (ddr3_cfg->coladdr == 9) { + if (ddr3_cfg->rowaddr == 13) + noc_sched->ddrconf = 2; + else if (ddr3_cfg->rowaddr == 14) + noc_sched->ddrconf = 15; + } else if (ddr3_cfg->coladdr == 10) { + if (ddr3_cfg->rowaddr == 14 && + sysinfo->ncs == 2) + noc_sched->ddrconf = 14; + else if (ddr3_cfg->rowaddr == 15 && + sysinfo->ncs == 2) + noc_sched->ddrconf = 9; + else + noc_sched->ddrconf = 3; + } else if (ddr3_cfg->coladdr == 11) { + if (ddr3_cfg->rowaddr == 15 && + sysinfo->ncs == 2) + noc_sched->ddrconf = 4; + else + noc_sched->ddrconf = 0; + } else if (ddr3_cfg->coladdr == 12) { + if (ddr3_cfg->rowaddr == 14) + noc_sched->ddrconf = 1; + } + } + + /* Disable MMDC arbitration/reordering */ + mmdc0->maarcr = 0x14420000; + } + /* Step 13: Deassert config request - init complete */ mmdc0->mdscr = 0x00000000; |