diff options
Diffstat (limited to 'drivers/ddr')
| -rw-r--r-- | drivers/ddr/altera/sdram.c | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/drivers/ddr/altera/sdram.c b/drivers/ddr/altera/sdram.c index 1d9324a..2377b45 100644 --- a/drivers/ddr/altera/sdram.c +++ b/drivers/ddr/altera/sdram.c @@ -514,20 +514,17 @@ static u32 sdr_get_addr_rw(struct socfpga_sdram_config *cfg) return dram_addrw | (rows << SDR_CTRLGRP_DRAMADDRW_ROWBITS_LSB); } -/* Function to initialize SDRAM MMR */ -unsigned sdram_mmr_init_full(unsigned int sdr_phy_reg) +/** + * sdr_load_regs() - Load SDRAM controller registers + * @cfg: SDRAM controller configuration data + * + * This function loads the register values into the SDRAM controller block. + */ +static void sdr_load_regs(struct socfpga_sdram_config *cfg) { - unsigned long status = 0; - struct socfpga_sdram_config *cfg = &sdram_config; - const unsigned int rows = - (cfg->dram_addrw & SDR_CTRLGRP_DRAMADDRW_ROWBITS_MASK) >> - SDR_CTRLGRP_DRAMADDRW_ROWBITS_LSB; - const u32 ctrl_cfg = sdr_get_ctrlcfg(cfg); const u32 dram_addrw = sdr_get_addr_rw(cfg); - writel(rows, &sysmgr_regs->iswgrp_handoff[4]); - debug("\nConfiguring CTRLCFG\n"); writel(ctrl_cfg, &sdr_ctrl->ctrl_cfg); @@ -616,6 +613,20 @@ unsigned sdram_mmr_init_full(unsigned int sdr_phy_reg) debug("Configuring DRAMODT\n"); writel(cfg->dram_odt, &sdr_ctrl->dram_odt); +} + +/* Function to initialize SDRAM MMR */ +unsigned sdram_mmr_init_full(unsigned int sdr_phy_reg) +{ + unsigned long status = 0; + struct socfpga_sdram_config *cfg = &sdram_config; + const unsigned int rows = + (cfg->dram_addrw & SDR_CTRLGRP_DRAMADDRW_ROWBITS_MASK) >> + SDR_CTRLGRP_DRAMADDRW_ROWBITS_LSB; + + writel(rows, &sysmgr_regs->iswgrp_handoff[4]); + + sdr_load_regs(cfg); /* saving this value to SYSMGR.ISWGRP.HANDOFF.FPGA2SDR */ writel(cfg->fpgaport_rst, &sysmgr_regs->iswgrp_handoff[3]); |