diff options
Diffstat (limited to 'drivers/ddr/altera/sdram_gen5.c')
| -rw-r--r-- | drivers/ddr/altera/sdram_gen5.c | 143 |
1 files changed, 128 insertions, 15 deletions
diff --git a/drivers/ddr/altera/sdram_gen5.c b/drivers/ddr/altera/sdram_gen5.c index 821060459c..fcd89b619d 100644 --- a/drivers/ddr/altera/sdram_gen5.c +++ b/drivers/ddr/altera/sdram_gen5.c @@ -3,14 +3,30 @@ * Copyright Altera Corporation (C) 2014-2015 */ #include <common.h> +#include <dm.h> #include <errno.h> #include <div64.h> +#include <ram.h> +#include <reset.h> #include <watchdog.h> #include <asm/arch/fpga_manager.h> +#include <asm/arch/reset_manager.h> #include <asm/arch/sdram.h> #include <asm/arch/system_manager.h> #include <asm/io.h> +#include "sequencer.h" + +#ifdef CONFIG_SPL_BUILD + +struct altera_gen5_sdram_priv { + struct ram_info info; +}; + +struct altera_gen5_sdram_platdata { + struct socfpga_sdr *sdr; +}; + struct sdram_prot_rule { u32 sdram_start; /* SDRAM start address */ u32 sdram_end; /* SDRAM end address */ @@ -26,8 +42,8 @@ struct sdram_prot_rule { static struct socfpga_system_manager *sysmgr_regs = (struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS; -static struct socfpga_sdr_ctrl *sdr_ctrl = - (struct socfpga_sdr_ctrl *)SDR_CTRLGRP_ADDRESS; + +static unsigned long sdram_calculate_size(struct socfpga_sdr_ctrl *sdr_ctrl); /** * get_errata_rows() - Up the number of DRAM rows to cover entire address space @@ -104,7 +120,8 @@ static int get_errata_rows(const struct socfpga_sdram_config *cfg) } /* SDRAM protection rules vary from 0-19, a total of 20 rules. */ -static void sdram_set_rule(struct sdram_prot_rule *prule) +static void sdram_set_rule(struct socfpga_sdr_ctrl *sdr_ctrl, + struct sdram_prot_rule *prule) { u32 lo_addr_bits; u32 hi_addr_bits; @@ -141,7 +158,8 @@ static void sdram_set_rule(struct sdram_prot_rule *prule) writel(0, &sdr_ctrl->prot_rule_rdwr); } -static void sdram_get_rule(struct sdram_prot_rule *prule) +static void sdram_get_rule(struct socfpga_sdr_ctrl *sdr_ctrl, + struct sdram_prot_rule *prule) { u32 addr; u32 id; @@ -172,7 +190,8 @@ static void sdram_get_rule(struct sdram_prot_rule *prule) } static void -sdram_set_protection_config(const u32 sdram_start, const u32 sdram_end) +sdram_set_protection_config(struct socfpga_sdr_ctrl *sdr_ctrl, + const u32 sdram_start, const u32 sdram_end) { struct sdram_prot_rule rule; int rules; @@ -185,7 +204,7 @@ sdram_set_protection_config(const u32 sdram_start, const u32 sdram_end) for (rules = 0; rules < 20; rules++) { rule.rule = rules; - sdram_set_rule(&rule); + sdram_set_rule(sdr_ctrl, &rule); } /* new rule: accept SDRAM */ @@ -200,13 +219,13 @@ sdram_set_protection_config(const u32 sdram_start, const u32 sdram_end) rule.rule = 0; /* set new rule */ - sdram_set_rule(&rule); + sdram_set_rule(sdr_ctrl, &rule); /* default rule: reject everything */ writel(0x3ff, &sdr_ctrl->protport_default); } -static void sdram_dump_protection_config(void) +static void sdram_dump_protection_config(struct socfpga_sdr_ctrl *sdr_ctrl) { struct sdram_prot_rule rule; int rules; @@ -216,7 +235,7 @@ static void sdram_dump_protection_config(void) for (rules = 0; rules < 20; rules++) { rule.rule = rules; - sdram_get_rule(&rule); + sdram_get_rule(sdr_ctrl, &rule); debug("Rule %d, rules ...\n", rules); debug(" sdram start %x\n", rule.sdram_start); debug(" sdram end %x\n", rule.sdram_end); @@ -322,7 +341,8 @@ static u32 sdr_get_addr_rw(const struct socfpga_sdram_config *cfg) * * This function loads the register values into the SDRAM controller block. */ -static void sdr_load_regs(const struct socfpga_sdram_config *cfg) +static void sdr_load_regs(struct socfpga_sdr_ctrl *sdr_ctrl, + const struct socfpga_sdram_config *cfg) { const u32 ctrl_cfg = sdr_get_ctrlcfg(cfg); const u32 dram_addrw = sdr_get_addr_rw(cfg); @@ -426,7 +446,8 @@ static void sdr_load_regs(const struct socfpga_sdram_config *cfg) * * Initialize the SDRAM MMR. */ -int sdram_mmr_init_full(unsigned int sdr_phy_reg) +int sdram_mmr_init_full(struct socfpga_sdr_ctrl *sdr_ctrl, + unsigned int sdr_phy_reg) { const struct socfpga_sdram_config *cfg = socfpga_get_sdram_config(); const unsigned int rows = @@ -436,7 +457,7 @@ int sdram_mmr_init_full(unsigned int sdr_phy_reg) writel(rows, &sysmgr_regs->iswgrp_handoff[4]); - sdr_load_regs(cfg); + sdr_load_regs(sdr_ctrl, cfg); /* saving this value to SYSMGR.ISWGRP.HANDOFF.FPGA2SDR */ writel(cfg->fpgaport_rst, &sysmgr_regs->iswgrp_handoff[3]); @@ -459,9 +480,10 @@ int sdram_mmr_init_full(unsigned int sdr_phy_reg) SDR_CTRLGRP_STATICCFG_APPLYCFG_MASK, 1 << SDR_CTRLGRP_STATICCFG_APPLYCFG_LSB); - sdram_set_protection_config(0, sdram_calculate_size() - 1); + sdram_set_protection_config(sdr_ctrl, 0, + sdram_calculate_size(sdr_ctrl) - 1); - sdram_dump_protection_config(); + sdram_dump_protection_config(sdr_ctrl); return 0; } @@ -472,7 +494,7 @@ int sdram_mmr_init_full(unsigned int sdr_phy_reg) * Calculate SDRAM device size based on SDRAM controller parameters. * Size is specified in bytes. */ -unsigned long sdram_calculate_size(void) +static unsigned long sdram_calculate_size(struct socfpga_sdr_ctrl *sdr_ctrl) { unsigned long temp; unsigned long row, bank, col, cs, width; @@ -534,3 +556,94 @@ unsigned long sdram_calculate_size(void) return temp; } + +static int altera_gen5_sdram_ofdata_to_platdata(struct udevice *dev) +{ + struct altera_gen5_sdram_platdata *plat = dev->platdata; + + plat->sdr = (struct socfpga_sdr *)devfdt_get_addr_index(dev, 0); + if (!plat->sdr) + return -ENODEV; + + return 0; +} + +static int altera_gen5_sdram_probe(struct udevice *dev) +{ + int ret; + unsigned long sdram_size; + struct altera_gen5_sdram_platdata *plat = dev->platdata; + struct altera_gen5_sdram_priv *priv = dev_get_priv(dev); + struct socfpga_sdr_ctrl *sdr_ctrl = &plat->sdr->sdr_ctrl; + struct reset_ctl_bulk resets; + + ret = reset_get_bulk(dev, &resets); + if (ret) { + dev_err(dev, "Can't get reset: %d\n", ret); + return -ENODEV; + } + reset_deassert_bulk(&resets); + + if (sdram_mmr_init_full(sdr_ctrl, 0xffffffff) != 0) { + puts("SDRAM init failed.\n"); + goto failed; + } + + debug("SDRAM: Calibrating PHY\n"); + /* SDRAM calibration */ + if (sdram_calibration_full(plat->sdr) == 0) { + puts("SDRAM calibration failed.\n"); + goto failed; + } + + sdram_size = sdram_calculate_size(sdr_ctrl); + debug("SDRAM: %ld MiB\n", sdram_size >> 20); + + /* Sanity check ensure correct SDRAM size specified */ + if (get_ram_size(0, sdram_size) != sdram_size) { + puts("SDRAM size check failed!\n"); + goto failed; + } + + priv->info.base = 0; + priv->info.size = sdram_size; + + return 0; + +failed: + reset_release_bulk(&resets); + return -ENODEV; +} + +static int altera_gen5_sdram_get_info(struct udevice *dev, + struct ram_info *info) +{ + struct altera_gen5_sdram_priv *priv = dev_get_priv(dev); + + info->base = priv->info.base; + info->size = priv->info.size; + + return 0; +} + +static struct ram_ops altera_gen5_sdram_ops = { + .get_info = altera_gen5_sdram_get_info, +}; + +static const struct udevice_id altera_gen5_sdram_ids[] = { + { .compatible = "altr,sdr-ctl" }, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(altera_gen5_sdram) = { + .name = "altr_sdr_ctl", + .id = UCLASS_RAM, + .of_match = altera_gen5_sdram_ids, + .ops = &altera_gen5_sdram_ops, + .ofdata_to_platdata = altera_gen5_sdram_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct altera_gen5_sdram_platdata), + .probe = altera_gen5_sdram_probe, + .priv_auto_alloc_size = sizeof(struct altera_gen5_sdram_priv), +}; + +#endif /* CONFIG_SPL_BUILD */ |