Lines Matching +full:emc +full:- +full:timings +full:-
1 // SPDX-License-Identifier: GPL-2.0-only
9 #include <linux/clk-provider.h>
15 #include <linux/interconnect-provider.h>
495 struct emc_timing *timings; member
507 * There are multiple sources in the EMC driver which could request
512 /* protect shared rate-change code path */
518 static void emc_ccfifo_writel(struct tegra_emc *emc, u32 value, in emc_ccfifo_writel() argument
521 writel(value, emc->regs + EMC_CCFIFO_DATA); in emc_ccfifo_writel()
522 writel(offset, emc->regs + EMC_CCFIFO_ADDR); in emc_ccfifo_writel()
525 static void emc_seq_update_timing(struct tegra_emc *emc) in emc_seq_update_timing() argument
530 writel(1, emc->regs + EMC_TIMING_CONTROL); in emc_seq_update_timing()
533 value = readl(emc->regs + EMC_STATUS); in emc_seq_update_timing()
539 dev_err(emc->dev, "timing update timed out\n"); in emc_seq_update_timing()
542 static void emc_seq_disable_auto_cal(struct tegra_emc *emc) in emc_seq_disable_auto_cal() argument
547 writel(0, emc->regs + EMC_AUTO_CAL_INTERVAL); in emc_seq_disable_auto_cal()
550 value = readl(emc->regs + EMC_AUTO_CAL_STATUS); in emc_seq_disable_auto_cal()
556 dev_err(emc->dev, "auto cal disable timed out\n"); in emc_seq_disable_auto_cal()
559 static void emc_seq_wait_clkchange(struct tegra_emc *emc) in emc_seq_wait_clkchange() argument
565 value = readl(emc->regs + EMC_INTSTATUS); in emc_seq_wait_clkchange()
571 dev_err(emc->dev, "clock change timed out\n"); in emc_seq_wait_clkchange()
574 static struct emc_timing *tegra_emc_find_timing(struct tegra_emc *emc, in tegra_emc_find_timing() argument
580 for (i = 0; i < emc->num_timings; i++) { in tegra_emc_find_timing()
581 if (emc->timings[i].rate == rate) { in tegra_emc_find_timing()
582 timing = &emc->timings[i]; in tegra_emc_find_timing()
588 dev_err(emc->dev, "no timing for rate %lu\n", rate); in tegra_emc_find_timing()
595 static int tegra_emc_prepare_timing_change(struct tegra_emc *emc, in tegra_emc_prepare_timing_change() argument
598 struct emc_timing *timing = tegra_emc_find_timing(emc, rate); in tegra_emc_prepare_timing_change()
599 struct emc_timing *last = &emc->last_timing; in tegra_emc_prepare_timing_change()
607 return -ENOENT; in tegra_emc_prepare_timing_change()
609 if ((last->emc_mode_1 & 0x1) == (timing->emc_mode_1 & 0x1)) in tegra_emc_prepare_timing_change()
611 else if (timing->emc_mode_1 & 0x1) in tegra_emc_prepare_timing_change()
617 writel(EMC_INTSTATUS_CLKCHANGE_COMPLETE, emc->regs + EMC_INTSTATUS); in tegra_emc_prepare_timing_change()
619 /* Disable dynamic self-refresh */ in tegra_emc_prepare_timing_change()
620 val = readl(emc->regs + EMC_CFG); in tegra_emc_prepare_timing_change()
623 writel(val, emc->regs + EMC_CFG); in tegra_emc_prepare_timing_change()
629 if (emc->dram_type == DRAM_TYPE_DDR3) in tegra_emc_prepare_timing_change()
634 val = readl(emc->regs + EMC_SEL_DPD_CTRL); in tegra_emc_prepare_timing_change()
637 writel(val, emc->regs + EMC_SEL_DPD_CTRL); in tegra_emc_prepare_timing_change()
641 val = readl(emc->regs + EMC_BGBIAS_CTL0); in tegra_emc_prepare_timing_change()
642 val2 = last->emc_bgbias_ctl0; in tegra_emc_prepare_timing_change()
643 if (!(timing->emc_bgbias_ctl0 & in tegra_emc_prepare_timing_change()
656 writel(val2, emc->regs + EMC_BGBIAS_CTL0); in tegra_emc_prepare_timing_change()
662 val = readl(emc->regs + EMC_XM2DQSPADCTRL2); in tegra_emc_prepare_timing_change()
663 if (timing->emc_xm2dqspadctrl2 & EMC_XM2DQSPADCTRL2_VREF_ENABLE && in tegra_emc_prepare_timing_change()
669 if (timing->emc_xm2dqspadctrl2 & EMC_XM2DQSPADCTRL2_RX_FT_REC_ENABLE && in tegra_emc_prepare_timing_change()
676 writel(val, emc->regs + EMC_XM2DQSPADCTRL2); in tegra_emc_prepare_timing_change()
683 emc_seq_update_timing(emc); in tegra_emc_prepare_timing_change()
688 if (last->emc_ctt_term_ctrl != timing->emc_ctt_term_ctrl) { in tegra_emc_prepare_timing_change()
689 emc_seq_disable_auto_cal(emc); in tegra_emc_prepare_timing_change()
690 writel(timing->emc_ctt_term_ctrl, in tegra_emc_prepare_timing_change()
691 emc->regs + EMC_CTT_TERM_CTRL); in tegra_emc_prepare_timing_change()
692 emc_seq_update_timing(emc); in tegra_emc_prepare_timing_change()
696 for (i = 0; i < ARRAY_SIZE(timing->emc_burst_data); ++i) in tegra_emc_prepare_timing_change()
697 writel(timing->emc_burst_data[i], in tegra_emc_prepare_timing_change()
698 emc->regs + emc_burst_regs[i]); in tegra_emc_prepare_timing_change()
700 writel(timing->emc_xm2dqspadctrl2, emc->regs + EMC_XM2DQSPADCTRL2); in tegra_emc_prepare_timing_change()
701 writel(timing->emc_zcal_interval, emc->regs + EMC_ZCAL_INTERVAL); in tegra_emc_prepare_timing_change()
703 tegra_mc_write_emem_configuration(emc->mc, timing->rate); in tegra_emc_prepare_timing_change()
705 val = timing->emc_cfg & ~EMC_CFG_POWER_FEATURES_MASK; in tegra_emc_prepare_timing_change()
706 emc_ccfifo_writel(emc, val, EMC_CFG); in tegra_emc_prepare_timing_change()
709 if (timing->emc_auto_cal_config2 != last->emc_auto_cal_config2) in tegra_emc_prepare_timing_change()
710 emc_ccfifo_writel(emc, timing->emc_auto_cal_config2, in tegra_emc_prepare_timing_change()
713 if (timing->emc_auto_cal_config3 != last->emc_auto_cal_config3) in tegra_emc_prepare_timing_change()
714 emc_ccfifo_writel(emc, timing->emc_auto_cal_config3, in tegra_emc_prepare_timing_change()
717 if (timing->emc_auto_cal_config != last->emc_auto_cal_config) { in tegra_emc_prepare_timing_change()
718 val = timing->emc_auto_cal_config; in tegra_emc_prepare_timing_change()
720 emc_ccfifo_writel(emc, val, EMC_AUTO_CAL_CONFIG); in tegra_emc_prepare_timing_change()
724 if (emc->dram_type == DRAM_TYPE_DDR3 && in tegra_emc_prepare_timing_change()
728 if (timing->emc_zcal_interval != 0 && in tegra_emc_prepare_timing_change()
729 last->emc_zcal_interval == 0) in tegra_emc_prepare_timing_change()
730 cnt -= emc->dram_num * 256; in tegra_emc_prepare_timing_change()
732 val = (timing->emc_mrs_wait_cnt in tegra_emc_prepare_timing_change()
738 val = timing->emc_mrs_wait_cnt in tegra_emc_prepare_timing_change()
743 writel(val, emc->regs + EMC_MRS_WAIT_CNT); in tegra_emc_prepare_timing_change()
746 val = timing->emc_cfg_2; in tegra_emc_prepare_timing_change()
748 emc_ccfifo_writel(emc, val, EMC_CFG_2); in tegra_emc_prepare_timing_change()
750 /* DDR3: Turn off DLL and enter self-refresh */ in tegra_emc_prepare_timing_change()
751 if (emc->dram_type == DRAM_TYPE_DDR3 && dll_change == DLL_CHANGE_OFF) in tegra_emc_prepare_timing_change()
752 emc_ccfifo_writel(emc, timing->emc_mode_1, EMC_EMRS); in tegra_emc_prepare_timing_change()
755 emc_ccfifo_writel(emc, EMC_REFCTRL_DEV_SEL(emc->dram_num), in tegra_emc_prepare_timing_change()
757 if (emc->dram_type == DRAM_TYPE_DDR3) in tegra_emc_prepare_timing_change()
758 emc_ccfifo_writel(emc, EMC_DRAM_DEV_SEL(emc->dram_num) | in tegra_emc_prepare_timing_change()
763 emc_ccfifo_writel(emc, 1, EMC_STALL_THEN_EXE_AFTER_CLKCHANGE); in tegra_emc_prepare_timing_change()
765 /* DDR3: Exit self-refresh */ in tegra_emc_prepare_timing_change()
766 if (emc->dram_type == DRAM_TYPE_DDR3) in tegra_emc_prepare_timing_change()
767 emc_ccfifo_writel(emc, EMC_DRAM_DEV_SEL(emc->dram_num), in tegra_emc_prepare_timing_change()
769 emc_ccfifo_writel(emc, EMC_REFCTRL_DEV_SEL(emc->dram_num) | in tegra_emc_prepare_timing_change()
774 if (emc->dram_type == DRAM_TYPE_DDR3) { in tegra_emc_prepare_timing_change()
775 if (timing->emc_mode_1 != last->emc_mode_1) in tegra_emc_prepare_timing_change()
776 emc_ccfifo_writel(emc, timing->emc_mode_1, EMC_EMRS); in tegra_emc_prepare_timing_change()
777 if (timing->emc_mode_2 != last->emc_mode_2) in tegra_emc_prepare_timing_change()
778 emc_ccfifo_writel(emc, timing->emc_mode_2, EMC_EMRS2); in tegra_emc_prepare_timing_change()
780 if ((timing->emc_mode_reset != last->emc_mode_reset) || in tegra_emc_prepare_timing_change()
782 val = timing->emc_mode_reset; in tegra_emc_prepare_timing_change()
789 emc_ccfifo_writel(emc, val, EMC_MRS); in tegra_emc_prepare_timing_change()
792 if (timing->emc_mode_2 != last->emc_mode_2) in tegra_emc_prepare_timing_change()
793 emc_ccfifo_writel(emc, timing->emc_mode_2, EMC_MRW2); in tegra_emc_prepare_timing_change()
794 if (timing->emc_mode_1 != last->emc_mode_1) in tegra_emc_prepare_timing_change()
795 emc_ccfifo_writel(emc, timing->emc_mode_1, EMC_MRW); in tegra_emc_prepare_timing_change()
796 if (timing->emc_mode_4 != last->emc_mode_4) in tegra_emc_prepare_timing_change()
797 emc_ccfifo_writel(emc, timing->emc_mode_4, EMC_MRW4); in tegra_emc_prepare_timing_change()
801 if (timing->emc_zcal_interval != 0 && last->emc_zcal_interval == 0) { in tegra_emc_prepare_timing_change()
802 emc_ccfifo_writel(emc, EMC_ZQ_CAL_LONG_CMD_DEV0, EMC_ZQ_CAL); in tegra_emc_prepare_timing_change()
803 if (emc->dram_num > 1) in tegra_emc_prepare_timing_change()
804 emc_ccfifo_writel(emc, EMC_ZQ_CAL_LONG_CMD_DEV1, in tegra_emc_prepare_timing_change()
809 emc_ccfifo_writel(emc, 0, EMC_CCFIFO_STATUS); in tegra_emc_prepare_timing_change()
811 if (timing->emc_cfg_2 & EMC_CFG_2_DIS_STP_OB_CLK_DURING_NON_WR) in tegra_emc_prepare_timing_change()
812 emc_ccfifo_writel(emc, timing->emc_cfg_2, EMC_CFG_2); in tegra_emc_prepare_timing_change()
815 emc_seq_disable_auto_cal(emc); in tegra_emc_prepare_timing_change()
818 readl(emc->regs + EMC_INTSTATUS); in tegra_emc_prepare_timing_change()
823 static void tegra_emc_complete_timing_change(struct tegra_emc *emc, in tegra_emc_complete_timing_change() argument
826 struct emc_timing *timing = tegra_emc_find_timing(emc, rate); in tegra_emc_complete_timing_change()
827 struct emc_timing *last = &emc->last_timing; in tegra_emc_complete_timing_change()
834 emc_seq_wait_clkchange(emc); in tegra_emc_complete_timing_change()
837 if (timing->emc_ctt_term_ctrl != last->emc_ctt_term_ctrl) in tegra_emc_complete_timing_change()
838 writel(timing->emc_auto_cal_interval, in tegra_emc_complete_timing_change()
839 emc->regs + EMC_AUTO_CAL_INTERVAL); in tegra_emc_complete_timing_change()
841 /* Restore dynamic self-refresh */ in tegra_emc_complete_timing_change()
842 if (timing->emc_cfg & EMC_CFG_PWR_MASK) in tegra_emc_complete_timing_change()
843 writel(timing->emc_cfg, emc->regs + EMC_CFG); in tegra_emc_complete_timing_change()
846 writel(timing->emc_zcal_cnt_long, emc->regs + EMC_ZCAL_WAIT_CNT); in tegra_emc_complete_timing_change()
849 if (emc->dram_type == DRAM_TYPE_LPDDR3 && in tegra_emc_complete_timing_change()
850 timing->emc_bgbias_ctl0 & in tegra_emc_complete_timing_change()
852 val = timing->emc_bgbias_ctl0; in tegra_emc_complete_timing_change()
855 writel(val, emc->regs + EMC_BGBIAS_CTL0); in tegra_emc_complete_timing_change()
857 if (emc->dram_type == DRAM_TYPE_DDR3 && in tegra_emc_complete_timing_change()
858 readl(emc->regs + EMC_BGBIAS_CTL0) != in tegra_emc_complete_timing_change()
859 timing->emc_bgbias_ctl0) { in tegra_emc_complete_timing_change()
860 writel(timing->emc_bgbias_ctl0, in tegra_emc_complete_timing_change()
861 emc->regs + EMC_BGBIAS_CTL0); in tegra_emc_complete_timing_change()
864 writel(timing->emc_auto_cal_interval, in tegra_emc_complete_timing_change()
865 emc->regs + EMC_AUTO_CAL_INTERVAL); in tegra_emc_complete_timing_change()
872 writel(timing->emc_sel_dpd_ctrl, emc->regs + EMC_SEL_DPD_CTRL); in tegra_emc_complete_timing_change()
873 emc_seq_update_timing(emc); in tegra_emc_complete_timing_change()
875 emc->last_timing = *timing; in tegra_emc_complete_timing_change()
880 static void emc_read_current_timing(struct tegra_emc *emc, in emc_read_current_timing() argument
886 timing->emc_burst_data[i] = in emc_read_current_timing()
887 readl(emc->regs + emc_burst_regs[i]); in emc_read_current_timing()
889 timing->emc_cfg = readl(emc->regs + EMC_CFG); in emc_read_current_timing()
891 timing->emc_auto_cal_interval = 0; in emc_read_current_timing()
892 timing->emc_zcal_cnt_long = 0; in emc_read_current_timing()
893 timing->emc_mode_1 = 0; in emc_read_current_timing()
894 timing->emc_mode_2 = 0; in emc_read_current_timing()
895 timing->emc_mode_4 = 0; in emc_read_current_timing()
896 timing->emc_mode_reset = 0; in emc_read_current_timing()
899 static int emc_init(struct tegra_emc *emc) in emc_init() argument
901 emc->dram_type = readl(emc->regs + EMC_FBIO_CFG5); in emc_init()
903 if (emc->dram_type & EMC_FBIO_CFG5_DRAM_WIDTH_X64) in emc_init()
904 emc->dram_bus_width = 64; in emc_init()
906 emc->dram_bus_width = 32; in emc_init()
908 dev_info_once(emc->dev, "%ubit DRAM bus\n", emc->dram_bus_width); in emc_init()
910 emc->dram_type &= EMC_FBIO_CFG5_DRAM_TYPE_MASK; in emc_init()
911 emc->dram_type >>= EMC_FBIO_CFG5_DRAM_TYPE_SHIFT; in emc_init()
913 emc->dram_num = tegra_mc_get_emem_device_count(emc->mc); in emc_init()
915 emc_read_current_timing(emc, &emc->last_timing); in emc_init()
920 static int load_one_timing_from_dt(struct tegra_emc *emc, in load_one_timing_from_dt() argument
927 err = of_property_read_u32(node, "clock-frequency", &value); in load_one_timing_from_dt()
929 dev_err(emc->dev, "timing %pOFn: failed to read rate: %d\n", in load_one_timing_from_dt()
934 timing->rate = value; in load_one_timing_from_dt()
936 err = of_property_read_u32_array(node, "nvidia,emc-configuration", in load_one_timing_from_dt()
937 timing->emc_burst_data, in load_one_timing_from_dt()
938 ARRAY_SIZE(timing->emc_burst_data)); in load_one_timing_from_dt()
940 dev_err(emc->dev, in load_one_timing_from_dt()
941 "timing %pOFn: failed to read emc burst data: %d\n", in load_one_timing_from_dt()
947 err = of_property_read_u32(node, dtprop, &timing->prop); \ in load_one_timing_from_dt()
949 dev_err(emc->dev, "timing %pOFn: failed to read " #prop ": %d\n", \ in load_one_timing_from_dt()
955 EMC_READ_PROP(emc_auto_cal_config, "nvidia,emc-auto-cal-config") in load_one_timing_from_dt()
956 EMC_READ_PROP(emc_auto_cal_config2, "nvidia,emc-auto-cal-config2") in load_one_timing_from_dt()
957 EMC_READ_PROP(emc_auto_cal_config3, "nvidia,emc-auto-cal-config3") in load_one_timing_from_dt()
958 EMC_READ_PROP(emc_auto_cal_interval, "nvidia,emc-auto-cal-interval") in load_one_timing_from_dt()
959 EMC_READ_PROP(emc_bgbias_ctl0, "nvidia,emc-bgbias-ctl0") in load_one_timing_from_dt()
960 EMC_READ_PROP(emc_cfg, "nvidia,emc-cfg") in load_one_timing_from_dt()
961 EMC_READ_PROP(emc_cfg_2, "nvidia,emc-cfg-2") in load_one_timing_from_dt()
962 EMC_READ_PROP(emc_ctt_term_ctrl, "nvidia,emc-ctt-term-ctrl") in load_one_timing_from_dt()
963 EMC_READ_PROP(emc_mode_1, "nvidia,emc-mode-1") in load_one_timing_from_dt()
964 EMC_READ_PROP(emc_mode_2, "nvidia,emc-mode-2") in load_one_timing_from_dt()
965 EMC_READ_PROP(emc_mode_4, "nvidia,emc-mode-4") in load_one_timing_from_dt()
966 EMC_READ_PROP(emc_mode_reset, "nvidia,emc-mode-reset") in load_one_timing_from_dt()
967 EMC_READ_PROP(emc_mrs_wait_cnt, "nvidia,emc-mrs-wait-cnt") in load_one_timing_from_dt()
968 EMC_READ_PROP(emc_sel_dpd_ctrl, "nvidia,emc-sel-dpd-ctrl") in load_one_timing_from_dt()
969 EMC_READ_PROP(emc_xm2dqspadctrl2, "nvidia,emc-xm2dqspadctrl2") in load_one_timing_from_dt()
970 EMC_READ_PROP(emc_zcal_cnt_long, "nvidia,emc-zcal-cnt-long") in load_one_timing_from_dt()
971 EMC_READ_PROP(emc_zcal_interval, "nvidia,emc-zcal-interval") in load_one_timing_from_dt()
983 if (a->rate < b->rate) in cmp_timings()
984 return -1; in cmp_timings()
985 else if (a->rate == b->rate) in cmp_timings()
991 static int tegra_emc_load_timings_from_dt(struct tegra_emc *emc, in tegra_emc_load_timings_from_dt() argument
999 emc->timings = devm_kcalloc(emc->dev, child_count, sizeof(*timing), in tegra_emc_load_timings_from_dt()
1001 if (!emc->timings) in tegra_emc_load_timings_from_dt()
1002 return -ENOMEM; in tegra_emc_load_timings_from_dt()
1004 emc->num_timings = child_count; in tegra_emc_load_timings_from_dt()
1007 timing = &emc->timings[i++]; in tegra_emc_load_timings_from_dt()
1009 err = load_one_timing_from_dt(emc, timing, child); in tegra_emc_load_timings_from_dt()
1014 sort(emc->timings, emc->num_timings, sizeof(*timing), cmp_timings, in tegra_emc_load_timings_from_dt()
1021 { .compatible = "nvidia,tegra124-emc" },
1022 { .compatible = "nvidia,tegra132-emc" },
1036 err = of_property_read_u32(np, "nvidia,ram-code", &value); in tegra_emc_find_node_by_ram_code()
1046 static void tegra_emc_rate_requests_init(struct tegra_emc *emc) in tegra_emc_rate_requests_init() argument
1051 emc->requested_rate[i].min_rate = 0; in tegra_emc_rate_requests_init()
1052 emc->requested_rate[i].max_rate = ULONG_MAX; in tegra_emc_rate_requests_init()
1056 static int emc_request_rate(struct tegra_emc *emc, in emc_request_rate() argument
1061 struct emc_rate_request *req = emc->requested_rate; in emc_request_rate()
1072 min_rate = max(req->min_rate, min_rate); in emc_request_rate()
1073 max_rate = min(req->max_rate, max_rate); in emc_request_rate()
1078 dev_err_ratelimited(emc->dev, "%s: type %u: out of range: %lu %lu\n", in emc_request_rate()
1080 return -ERANGE; in emc_request_rate()
1084 * EMC rate-changes should go via OPP API because it manages voltage in emc_request_rate()
1087 err = dev_pm_opp_set_rate(emc->dev, min_rate); in emc_request_rate()
1091 emc->requested_rate[type].min_rate = new_min_rate; in emc_request_rate()
1092 emc->requested_rate[type].max_rate = new_max_rate; in emc_request_rate()
1097 static int emc_set_min_rate(struct tegra_emc *emc, unsigned long rate, in emc_set_min_rate() argument
1100 struct emc_rate_request *req = &emc->requested_rate[type]; in emc_set_min_rate()
1103 mutex_lock(&emc->rate_lock); in emc_set_min_rate()
1104 ret = emc_request_rate(emc, rate, req->max_rate, type); in emc_set_min_rate()
1105 mutex_unlock(&emc->rate_lock); in emc_set_min_rate()
1110 static int emc_set_max_rate(struct tegra_emc *emc, unsigned long rate, in emc_set_max_rate() argument
1113 struct emc_rate_request *req = &emc->requested_rate[type]; in emc_set_max_rate()
1116 mutex_lock(&emc->rate_lock); in emc_set_max_rate()
1117 ret = emc_request_rate(emc, req->min_rate, rate, type); in emc_set_max_rate()
1118 mutex_unlock(&emc->rate_lock); in emc_set_max_rate()
1127 * to control the EMC frequency. The top-level directory can be found here:
1129 * /sys/kernel/debug/emc
1133 * - available_rates: This file contains a list of valid, space-separated
1134 * EMC frequencies.
1136 * - min_rate: Writing a value to this file sets the given frequency as the
1138 * configured EMC frequency, this will cause the frequency to be
1141 * - max_rate: Similarily to the min_rate file, writing a value to this file
1143 * the value is lower than the currently configured EMC frequency, this
1148 static bool tegra_emc_validate_rate(struct tegra_emc *emc, unsigned long rate) in tegra_emc_validate_rate() argument
1152 for (i = 0; i < emc->num_timings; i++) in tegra_emc_validate_rate()
1153 if (rate == emc->timings[i].rate) in tegra_emc_validate_rate()
1162 struct tegra_emc *emc = s->private; in tegra_emc_debug_available_rates_show() local
1166 for (i = 0; i < emc->num_timings; i++) { in tegra_emc_debug_available_rates_show()
1167 seq_printf(s, "%s%lu", prefix, emc->timings[i].rate); in tegra_emc_debug_available_rates_show()
1180 struct tegra_emc *emc = data; in tegra_emc_debug_min_rate_get() local
1182 *rate = emc->debugfs.min_rate; in tegra_emc_debug_min_rate_get()
1189 struct tegra_emc *emc = data; in tegra_emc_debug_min_rate_set() local
1192 if (!tegra_emc_validate_rate(emc, rate)) in tegra_emc_debug_min_rate_set()
1193 return -EINVAL; in tegra_emc_debug_min_rate_set()
1195 err = emc_set_min_rate(emc, rate, EMC_RATE_DEBUG); in tegra_emc_debug_min_rate_set()
1199 emc->debugfs.min_rate = rate; in tegra_emc_debug_min_rate_set()
1210 struct tegra_emc *emc = data; in tegra_emc_debug_max_rate_get() local
1212 *rate = emc->debugfs.max_rate; in tegra_emc_debug_max_rate_get()
1219 struct tegra_emc *emc = data; in tegra_emc_debug_max_rate_set() local
1222 if (!tegra_emc_validate_rate(emc, rate)) in tegra_emc_debug_max_rate_set()
1223 return -EINVAL; in tegra_emc_debug_max_rate_set()
1225 err = emc_set_max_rate(emc, rate, EMC_RATE_DEBUG); in tegra_emc_debug_max_rate_set()
1229 emc->debugfs.max_rate = rate; in tegra_emc_debug_max_rate_set()
1238 static void emc_debugfs_init(struct device *dev, struct tegra_emc *emc) in emc_debugfs_init() argument
1243 emc->debugfs.min_rate = ULONG_MAX; in emc_debugfs_init()
1244 emc->debugfs.max_rate = 0; in emc_debugfs_init()
1246 for (i = 0; i < emc->num_timings; i++) { in emc_debugfs_init()
1247 if (emc->timings[i].rate < emc->debugfs.min_rate) in emc_debugfs_init()
1248 emc->debugfs.min_rate = emc->timings[i].rate; in emc_debugfs_init()
1250 if (emc->timings[i].rate > emc->debugfs.max_rate) in emc_debugfs_init()
1251 emc->debugfs.max_rate = emc->timings[i].rate; in emc_debugfs_init()
1254 if (!emc->num_timings) { in emc_debugfs_init()
1255 emc->debugfs.min_rate = clk_get_rate(emc->clk); in emc_debugfs_init()
1256 emc->debugfs.max_rate = emc->debugfs.min_rate; in emc_debugfs_init()
1259 err = clk_set_rate_range(emc->clk, emc->debugfs.min_rate, in emc_debugfs_init()
1260 emc->debugfs.max_rate); in emc_debugfs_init()
1262 dev_err(dev, "failed to set rate range [%lu-%lu] for %pC\n", in emc_debugfs_init()
1263 emc->debugfs.min_rate, emc->debugfs.max_rate, in emc_debugfs_init()
1264 emc->clk); in emc_debugfs_init()
1268 emc->debugfs.root = debugfs_create_dir("emc", NULL); in emc_debugfs_init()
1270 debugfs_create_file("available_rates", 0444, emc->debugfs.root, emc, in emc_debugfs_init()
1272 debugfs_create_file("min_rate", 0644, emc->debugfs.root, in emc_debugfs_init()
1273 emc, &tegra_emc_debug_min_rate_fops); in emc_debugfs_init()
1274 debugfs_create_file("max_rate", 0644, emc->debugfs.root, in emc_debugfs_init()
1275 emc, &tegra_emc_debug_max_rate_fops); in emc_debugfs_init()
1292 list_for_each_entry(node, &provider->nodes, node_list) { in emc_of_icc_xlate_extended()
1293 if (node->id != TEGRA_ICC_EMEM) in emc_of_icc_xlate_extended()
1298 return ERR_PTR(-ENOMEM); in emc_of_icc_xlate_extended()
1304 ndata->tag = TEGRA_MC_ICC_TAG_ISO; in emc_of_icc_xlate_extended()
1305 ndata->node = node; in emc_of_icc_xlate_extended()
1310 return ERR_PTR(-EPROBE_DEFER); in emc_of_icc_xlate_extended()
1315 struct tegra_emc *emc = to_tegra_emc_provider(dst->provider); in emc_icc_set() local
1316 unsigned long long peak_bw = icc_units_to_bps(dst->peak_bw); in emc_icc_set()
1317 unsigned long long avg_bw = icc_units_to_bps(dst->avg_bw); in emc_icc_set()
1324 * Tegra124 EMC runs on a clock rate of SDRAM bus. This means that in emc_icc_set()
1325 * EMC clock rate is twice smaller than the peak data rate because in emc_icc_set()
1326 * data is sampled on both EMC clock edges. in emc_icc_set()
1328 dram_data_bus_width_bytes = emc->dram_bus_width / 8; in emc_icc_set()
1332 err = emc_set_min_rate(emc, rate, EMC_RATE_ICC); in emc_icc_set()
1339 static int tegra_emc_interconnect_init(struct tegra_emc *emc) in tegra_emc_interconnect_init() argument
1341 const struct tegra_mc_soc *soc = emc->mc->soc; in tegra_emc_interconnect_init()
1345 emc->provider.dev = emc->dev; in tegra_emc_interconnect_init()
1346 emc->provider.set = emc_icc_set; in tegra_emc_interconnect_init()
1347 emc->provider.data = &emc->provider; in tegra_emc_interconnect_init()
1348 emc->provider.aggregate = soc->icc_ops->aggregate; in tegra_emc_interconnect_init()
1349 emc->provider.xlate_extended = emc_of_icc_xlate_extended; in tegra_emc_interconnect_init()
1351 icc_provider_init(&emc->provider); in tegra_emc_interconnect_init()
1360 node->name = "External Memory Controller"; in tegra_emc_interconnect_init()
1361 icc_node_add(node, &emc->provider); in tegra_emc_interconnect_init()
1375 node->name = "External Memory (DRAM)"; in tegra_emc_interconnect_init()
1376 icc_node_add(node, &emc->provider); in tegra_emc_interconnect_init()
1378 err = icc_provider_register(&emc->provider); in tegra_emc_interconnect_init()
1385 icc_nodes_remove(&emc->provider); in tegra_emc_interconnect_init()
1387 dev_err(emc->dev, "failed to initialize ICC: %d\n", err); in tegra_emc_interconnect_init()
1392 static int tegra_emc_opp_table_init(struct tegra_emc *emc) in tegra_emc_opp_table_init() argument
1397 err = dev_pm_opp_set_supported_hw(emc->dev, &hw_version, 1); in tegra_emc_opp_table_init()
1399 dev_err(emc->dev, "failed to set OPP supported HW: %d\n", err); in tegra_emc_opp_table_init()
1404 err = dev_pm_opp_of_add_table(emc->dev); in tegra_emc_opp_table_init()
1406 if (err == -ENODEV) in tegra_emc_opp_table_init()
1407 dev_err(emc->dev, "OPP table not found, please update your device tree\n"); in tegra_emc_opp_table_init()
1409 dev_err(emc->dev, "failed to add OPP table: %d\n", err); in tegra_emc_opp_table_init()
1414 dev_info_once(emc->dev, "OPP HW ver. 0x%x, current clock rate %lu MHz\n", in tegra_emc_opp_table_init()
1415 hw_version, clk_get_rate(emc->clk) / 1000000); in tegra_emc_opp_table_init()
1417 /* first dummy rate-set initializes voltage state */ in tegra_emc_opp_table_init()
1418 err = dev_pm_opp_set_rate(emc->dev, clk_get_rate(emc->clk)); in tegra_emc_opp_table_init()
1420 dev_err(emc->dev, "failed to initialize OPP clock: %d\n", err); in tegra_emc_opp_table_init()
1427 dev_pm_opp_of_remove_table(emc->dev); in tegra_emc_opp_table_init()
1442 struct tegra_emc *emc; in tegra_emc_probe() local
1446 emc = devm_kzalloc(&pdev->dev, sizeof(*emc), GFP_KERNEL); in tegra_emc_probe()
1447 if (!emc) in tegra_emc_probe()
1448 return -ENOMEM; in tegra_emc_probe()
1450 mutex_init(&emc->rate_lock); in tegra_emc_probe()
1451 emc->dev = &pdev->dev; in tegra_emc_probe()
1453 emc->regs = devm_platform_ioremap_resource(pdev, 0); in tegra_emc_probe()
1454 if (IS_ERR(emc->regs)) in tegra_emc_probe()
1455 return PTR_ERR(emc->regs); in tegra_emc_probe()
1457 emc->mc = devm_tegra_memory_controller_get(&pdev->dev); in tegra_emc_probe()
1458 if (IS_ERR(emc->mc)) in tegra_emc_probe()
1459 return PTR_ERR(emc->mc); in tegra_emc_probe()
1463 np = tegra_emc_find_node_by_ram_code(pdev->dev.of_node, ram_code); in tegra_emc_probe()
1465 err = tegra_emc_load_timings_from_dt(emc, np); in tegra_emc_probe()
1470 dev_info_once(&pdev->dev, in tegra_emc_probe()
1471 "no memory timings for RAM code %u found in DT\n", in tegra_emc_probe()
1475 err = emc_init(emc); in tegra_emc_probe()
1477 dev_err(&pdev->dev, "EMC initialization failed: %d\n", err); in tegra_emc_probe()
1481 platform_set_drvdata(pdev, emc); in tegra_emc_probe()
1486 err = devm_add_action_or_reset(&pdev->dev, devm_tegra_emc_unset_callback, in tegra_emc_probe()
1491 emc->clk = devm_clk_get(&pdev->dev, "emc"); in tegra_emc_probe()
1492 if (IS_ERR(emc->clk)) { in tegra_emc_probe()
1493 err = PTR_ERR(emc->clk); in tegra_emc_probe()
1494 dev_err(&pdev->dev, "failed to get EMC clock: %d\n", err); in tegra_emc_probe()
1498 err = tegra_emc_opp_table_init(emc); in tegra_emc_probe()
1502 tegra_emc_rate_requests_init(emc); in tegra_emc_probe()
1505 emc_debugfs_init(&pdev->dev, emc); in tegra_emc_probe()
1507 tegra_emc_interconnect_init(emc); in tegra_emc_probe()
1522 .name = "tegra-emc",
1531 MODULE_DESCRIPTION("NVIDIA Tegra124 EMC driver");