diff options
Diffstat (limited to 'drivers/ddr/altera/sequencer.c')
| -rw-r--r-- | drivers/ddr/altera/sequencer.c | 194 |
1 files changed, 158 insertions, 36 deletions
diff --git a/drivers/ddr/altera/sequencer.c b/drivers/ddr/altera/sequencer.c index b85b56efe5..35bda9b34c 100644 --- a/drivers/ddr/altera/sequencer.c +++ b/drivers/ddr/altera/sequencer.c @@ -7,6 +7,7 @@ #include <asm/io.h> #include <asm/arch/sdram.h> #include <errno.h> +#include <hang.h> #include "sequencer.h" static const struct socfpga_sdr_rw_load_manager *sdr_rw_load_mgr_regs = @@ -54,6 +55,21 @@ static const struct socfpga_sdr_ctrl *sdr_ctrl = #define SKIP_DELAY_LOOP_VALUE_OR_ZERO(non_skip_value) \ ((non_skip_value) & seq->skip_delay_mask) +bool dram_is_ddr(const u8 ddr) +{ + const struct socfpga_sdram_config *cfg = socfpga_get_sdram_config(); + const u8 type = (cfg->ctrl_cfg >> SDR_CTRLGRP_CTRLCFG_MEMTYPE_LSB) & + SDR_CTRLGRP_CTRLCFG_MEMTYPE_MASK; + + if (ddr == 2 && type == 1) /* DDR2 */ + return true; + + if (ddr == 3 && type == 2) /* DDR3 */ + return true; + + return false; +} + static void set_failing_group_stage(struct socfpga_sdrseq *seq, u32 group, u32 stage, u32 substage) { @@ -164,6 +180,8 @@ static void set_rank_and_odt_mask(struct socfpga_sdrseq *seq, */ odt_mask_0 = 0x3 & ~(1 << rank); odt_mask_1 = 0x3; + if (dram_is_ddr(2)) + odt_mask_1 &= ~(1 << rank); } else { /* * - Single-Slot , Dual-Rank (2 CS per DIMM) @@ -176,10 +194,11 @@ static void set_rank_and_odt_mask(struct socfpga_sdrseq *seq, } break; case 4: /* 4 Ranks */ - /* Read: + /* + * DDR3 Read, DDR2 Read/Write: * ----------+-----------------------+ * | ODT | - * Read From +-----------------------+ + * +-----------------------+ * Rank | 3 | 2 | 1 | 0 | * ----------+-----+-----+-----+-----+ * 0 | 0 | 1 | 0 | 0 | @@ -188,7 +207,7 @@ static void set_rank_and_odt_mask(struct socfpga_sdrseq *seq, * 3 | 0 | 0 | 1 | 0 | * ----------+-----+-----+-----+-----+ * - * Write: + * DDR3 Write: * ----------+-----------------------+ * | ODT | * Write To +-----------------------+ @@ -203,19 +222,31 @@ static void set_rank_and_odt_mask(struct socfpga_sdrseq *seq, switch (rank) { case 0: odt_mask_0 = 0x4; - odt_mask_1 = 0x5; + if (dram_is_ddr(2)) + odt_mask_1 = 0x4; + else if (dram_is_ddr(3)) + odt_mask_1 = 0x5; break; case 1: odt_mask_0 = 0x8; - odt_mask_1 = 0xA; + if (dram_is_ddr(2)) + odt_mask_1 = 0x8; + else if (dram_is_ddr(3)) + odt_mask_1 = 0xA; break; case 2: odt_mask_0 = 0x1; - odt_mask_1 = 0x5; + if (dram_is_ddr(2)) + odt_mask_1 = 0x1; + else if (dram_is_ddr(3)) + odt_mask_1 = 0x5; break; case 3: odt_mask_0 = 0x2; - odt_mask_1 = 0xA; + if (dram_is_ddr(2)) + odt_mask_1 = 0x2; + else if (dram_is_ddr(3)) + odt_mask_1 = 0xA; break; } break; @@ -839,6 +870,12 @@ static void delay_for_n_mem_clocks(struct socfpga_sdrseq *seq, debug("%s:%d clocks=%u ... end\n", __func__, __LINE__, clocks); } +static void delay_for_n_ns(struct socfpga_sdrseq *seq, const u32 ns) +{ + delay_for_n_mem_clocks(seq, (ns * seq->misccfg->afi_clk_freq * + seq->misccfg->afi_rate_ratio) / 1000); +} + /** * rw_mgr_mem_init_load_regs() - Load instruction registers * @cntr0: Counter 0 value @@ -872,14 +909,59 @@ static void rw_mgr_mem_init_load_regs(struct socfpga_sdrseq *seq, } /** - * rw_mgr_mem_load_user() - Load user calibration values + * rw_mgr_mem_load_user_ddr2() - Load user calibration values for DDR2 + * @handoff: Indicate whether this is initialization or handoff phase + * + * Load user calibration values and optionally precharge the banks. + */ +static void rw_mgr_mem_load_user_ddr2(struct socfpga_sdrseq *seq, + const int handoff) +{ + u32 grpaddr = SDR_PHYGRP_RWMGRGRP_ADDRESS | + RW_MGR_RUN_SINGLE_GROUP_OFFSET; + u32 r; + + for (r = 0; r < seq->rwcfg->mem_number_of_ranks; r++) { + /* set rank */ + set_rank_and_odt_mask(seq, r, RW_MGR_ODT_MODE_OFF); + + /* precharge all banks ... */ + writel(seq->rwcfg->precharge_all, grpaddr); + + writel(seq->rwcfg->emr2, grpaddr); + writel(seq->rwcfg->emr3, grpaddr); + writel(seq->rwcfg->emr, grpaddr); + + if (handoff) { + writel(seq->rwcfg->mr_user, grpaddr); + continue; + } + + writel(seq->rwcfg->mr_dll_reset, grpaddr); + + writel(seq->rwcfg->precharge_all, grpaddr); + + writel(seq->rwcfg->refresh, grpaddr); + delay_for_n_ns(seq, 200); + writel(seq->rwcfg->refresh, grpaddr); + delay_for_n_ns(seq, 200); + + writel(seq->rwcfg->mr_calib, grpaddr); + writel(/*seq->rwcfg->*/0x0b, grpaddr); // EMR_OCD_ENABLE + writel(seq->rwcfg->emr, grpaddr); + delay_for_n_mem_clocks(seq, 200); + } +} + +/** + * rw_mgr_mem_load_user_ddr3() - Load user calibration values * @fin1: Final instruction 1 * @fin2: Final instruction 2 * @precharge: If 1, precharge the banks at the end * * Load user calibration values and optionally precharge the banks. */ -static void rw_mgr_mem_load_user(struct socfpga_sdrseq *seq, +static void rw_mgr_mem_load_user_ddr3(struct socfpga_sdrseq *seq, const u32 fin1, const u32 fin2, const int precharge) { @@ -936,6 +1018,25 @@ static void rw_mgr_mem_load_user(struct socfpga_sdrseq *seq, } /** + * rw_mgr_mem_load_user() - Load user calibration values + * @fin1: Final instruction 1 + * @fin2: Final instruction 2 + * @precharge: If 1, precharge the banks at the end + * + * Load user calibration values and optionally precharge the banks. + */ +static void rw_mgr_mem_load_user(struct socfpga_sdrseq *seq, + const u32 fin1, const u32 fin2, + const int precharge) +{ + if (dram_is_ddr(2)) + rw_mgr_mem_load_user_ddr2(seq, precharge); + else if (dram_is_ddr(3)) + rw_mgr_mem_load_user_ddr3(seq, fin1, fin2, precharge); + else + hang(); +} +/** * rw_mgr_mem_initialize() - Initialize RW Manager * * Initialize RW Manager. @@ -945,8 +1046,10 @@ static void rw_mgr_mem_initialize(struct socfpga_sdrseq *seq) debug("%s:%d\n", __func__, __LINE__); /* The reset / cke part of initialization is broadcasted to all ranks */ - writel(RW_MGR_RANK_ALL, SDR_PHYGRP_RWMGRGRP_ADDRESS | - RW_MGR_SET_CS_AND_ODT_MASK_OFFSET); + if (dram_is_ddr(3)) { + writel(RW_MGR_RANK_ALL, SDR_PHYGRP_RWMGRGRP_ADDRESS | + RW_MGR_SET_CS_AND_ODT_MASK_OFFSET); + } /* * Here's how you load register for a loop @@ -979,29 +1082,38 @@ static void rw_mgr_mem_initialize(struct socfpga_sdrseq *seq) /* Indicate that memory is stable. */ writel(1, &phy_mgr_cfg->reset_mem_stbl); - /* - * transition the RESET to high - * Wait for 500us - */ + if (dram_is_ddr(2)) { + writel(seq->rwcfg->nop, SDR_PHYGRP_RWMGRGRP_ADDRESS | + RW_MGR_RUN_SINGLE_GROUP_OFFSET); - /* - * 500us @ 266MHz (3.75 ns) ~ 134000 clock cycles - * If a and b are the number of iteration in 2 nested loops - * it takes the following number of cycles to complete the operation - * number_of_cycles = ((2 + n) * a + 2) * b - * where n is the number of instruction in the inner loop - * One possible solution is n = 2 , a = 131 , b = 256 => a = 83, - * b = FF - */ - rw_mgr_mem_init_load_regs(seq, seq->misccfg->treset_cntr0_val, - seq->misccfg->treset_cntr1_val, - seq->misccfg->treset_cntr2_val, - seq->rwcfg->init_reset_1_cke_0); + /* Bring up clock enable. */ - /* Bring up clock enable. */ + /* tXRP < 400 ck cycles */ + delay_for_n_ns(seq, 400); + } else if (dram_is_ddr(3)) { + /* + * transition the RESET to high + * Wait for 500us + */ + + /* + * 500us @ 266MHz (3.75 ns) ~ 134000 clock cycles + * If a and b are the number of iteration in 2 nested loops + * it takes the following number of cycles to complete the + * operation number_of_cycles = ((2 + n) * a + 2) * b + * where n is the number of instruction in the inner loop + * One possible solution is + * n = 2 , a = 131 , b = 256 => a = 83, b = FF + */ + rw_mgr_mem_init_load_regs(seq, seq->misccfg->treset_cntr0_val, + seq->misccfg->treset_cntr1_val, + seq->misccfg->treset_cntr2_val, + seq->rwcfg->init_reset_1_cke_0); + /* Bring up clock enable. */ - /* tXRP < 250 ck cycles */ - delay_for_n_mem_clocks(seq, 250); + /* tXRP < 250 ck cycles */ + delay_for_n_mem_clocks(seq, 250); + } rw_mgr_mem_load_user(seq, seq->rwcfg->mrs0_dll_reset_mirr, seq->rwcfg->mrs0_dll_reset, 0); @@ -3769,16 +3881,26 @@ static void initialize_tracking(struct socfpga_sdrseq *seq) &sdr_reg_file->delays); /* mux delay */ - writel((seq->rwcfg->idle << 24) | (seq->rwcfg->activate_1 << 16) | - (seq->rwcfg->sgle_read << 8) | (seq->rwcfg->precharge_all << 0), - &sdr_reg_file->trk_rw_mgr_addr); + if (dram_is_ddr(2)) { + writel(0, &sdr_reg_file->trk_rw_mgr_addr); + } else if (dram_is_ddr(3)) { + writel((seq->rwcfg->idle << 24) | + (seq->rwcfg->activate_1 << 16) | + (seq->rwcfg->sgle_read << 8) | + (seq->rwcfg->precharge_all << 0), + &sdr_reg_file->trk_rw_mgr_addr); + } writel(seq->rwcfg->mem_if_read_dqs_width, &sdr_reg_file->trk_read_dqs_width); /* trefi [7:0] */ - writel((seq->rwcfg->refresh_all << 24) | (1000 << 0), - &sdr_reg_file->trk_rfsh); + if (dram_is_ddr(2)) { + writel(1000 << 0, &sdr_reg_file->trk_rfsh); + } else if (dram_is_ddr(3)) { + writel((seq->rwcfg->refresh_all << 24) | (1000 << 0), + &sdr_reg_file->trk_rfsh); + } } int sdram_calibration_full(struct socfpga_sdr *sdr) |