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Diffstat (limited to 'drivers/memory/tegra/tegra210-emc-cc-r21021.c')
-rw-r--r--drivers/memory/tegra/tegra210-emc-cc-r21021.c1774
1 files changed, 1774 insertions, 0 deletions
diff --git a/drivers/memory/tegra/tegra210-emc-cc-r21021.c b/drivers/memory/tegra/tegra210-emc-cc-r21021.c
new file mode 100644
index 000000000..cc76adb8d
--- /dev/null
+++ b/drivers/memory/tegra/tegra210-emc-cc-r21021.c
@@ -0,0 +1,1774 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2014-2020, NVIDIA CORPORATION. All rights reserved.
+ */
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+
+#include <soc/tegra/mc.h>
+
+#include "tegra210-emc.h"
+#include "tegra210-mc.h"
+
+/*
+ * Enable flags for specifying verbosity.
+ */
+#define INFO (1 << 0)
+#define STEPS (1 << 1)
+#define SUB_STEPS (1 << 2)
+#define PRELOCK (1 << 3)
+#define PRELOCK_STEPS (1 << 4)
+#define ACTIVE_EN (1 << 5)
+#define PRAMP_UP (1 << 6)
+#define PRAMP_DN (1 << 7)
+#define EMA_WRITES (1 << 10)
+#define EMA_UPDATES (1 << 11)
+#define PER_TRAIN (1 << 16)
+#define CC_PRINT (1 << 17)
+#define CCFIFO (1 << 29)
+#define REGS (1 << 30)
+#define REG_LISTS (1 << 31)
+
+#define emc_dbg(emc, flags, ...) dev_dbg(emc->dev, __VA_ARGS__)
+
+#define DVFS_CLOCK_CHANGE_VERSION 21021
+#define EMC_PRELOCK_VERSION 2101
+
+enum {
+ DVFS_SEQUENCE = 1,
+ WRITE_TRAINING_SEQUENCE = 2,
+ PERIODIC_TRAINING_SEQUENCE = 3,
+ DVFS_PT1 = 10,
+ DVFS_UPDATE = 11,
+ TRAINING_PT1 = 12,
+ TRAINING_UPDATE = 13,
+ PERIODIC_TRAINING_UPDATE = 14
+};
+
+/*
+ * PTFV defines - basically just indexes into the per table PTFV array.
+ */
+#define PTFV_DQSOSC_MOVAVG_C0D0U0_INDEX 0
+#define PTFV_DQSOSC_MOVAVG_C0D0U1_INDEX 1
+#define PTFV_DQSOSC_MOVAVG_C0D1U0_INDEX 2
+#define PTFV_DQSOSC_MOVAVG_C0D1U1_INDEX 3
+#define PTFV_DQSOSC_MOVAVG_C1D0U0_INDEX 4
+#define PTFV_DQSOSC_MOVAVG_C1D0U1_INDEX 5
+#define PTFV_DQSOSC_MOVAVG_C1D1U0_INDEX 6
+#define PTFV_DQSOSC_MOVAVG_C1D1U1_INDEX 7
+#define PTFV_DVFS_SAMPLES_INDEX 9
+#define PTFV_MOVAVG_WEIGHT_INDEX 10
+#define PTFV_CONFIG_CTRL_INDEX 11
+
+#define PTFV_CONFIG_CTRL_USE_PREVIOUS_EMA (1 << 0)
+
+/*
+ * Do arithmetic in fixed point.
+ */
+#define MOVAVG_PRECISION_FACTOR 100
+
+/*
+ * The division portion of the average operation.
+ */
+#define __AVERAGE_PTFV(dev) \
+ ({ next->ptfv_list[PTFV_DQSOSC_MOVAVG_ ## dev ## _INDEX] = \
+ next->ptfv_list[PTFV_DQSOSC_MOVAVG_ ## dev ## _INDEX] / \
+ next->ptfv_list[PTFV_DVFS_SAMPLES_INDEX]; })
+
+/*
+ * Convert val to fixed point and add it to the temporary average.
+ */
+#define __INCREMENT_PTFV(dev, val) \
+ ({ next->ptfv_list[PTFV_DQSOSC_MOVAVG_ ## dev ## _INDEX] += \
+ ((val) * MOVAVG_PRECISION_FACTOR); })
+
+/*
+ * Convert a moving average back to integral form and return the value.
+ */
+#define __MOVAVG_AC(timing, dev) \
+ ((timing)->ptfv_list[PTFV_DQSOSC_MOVAVG_ ## dev ## _INDEX] / \
+ MOVAVG_PRECISION_FACTOR)
+
+/* Weighted update. */
+#define __WEIGHTED_UPDATE_PTFV(dev, nval) \
+ do { \
+ int w = PTFV_MOVAVG_WEIGHT_INDEX; \
+ int dqs = PTFV_DQSOSC_MOVAVG_ ## dev ## _INDEX; \
+ \
+ next->ptfv_list[dqs] = \
+ ((nval * MOVAVG_PRECISION_FACTOR) + \
+ (next->ptfv_list[dqs] * \
+ next->ptfv_list[w])) / \
+ (next->ptfv_list[w] + 1); \
+ \
+ emc_dbg(emc, EMA_UPDATES, "%s: (s=%lu) EMA: %u\n", \
+ __stringify(dev), nval, next->ptfv_list[dqs]); \
+ } while (0)
+
+/* Access a particular average. */
+#define __MOVAVG(timing, dev) \
+ ((timing)->ptfv_list[PTFV_DQSOSC_MOVAVG_ ## dev ## _INDEX])
+
+static u32 update_clock_tree_delay(struct tegra210_emc *emc, int type)
+{
+ bool periodic_training_update = type == PERIODIC_TRAINING_UPDATE;
+ struct tegra210_emc_timing *last = emc->last;
+ struct tegra210_emc_timing *next = emc->next;
+ u32 last_timing_rate_mhz = last->rate / 1000;
+ u32 next_timing_rate_mhz = next->rate / 1000;
+ bool dvfs_update = type == DVFS_UPDATE;
+ s32 tdel = 0, tmdel = 0, adel = 0;
+ bool dvfs_pt1 = type == DVFS_PT1;
+ unsigned long cval = 0;
+ u32 temp[2][2], value;
+ unsigned int i;
+
+ /*
+ * Dev0 MSB.
+ */
+ if (dvfs_pt1 || periodic_training_update) {
+ value = tegra210_emc_mrr_read(emc, 2, 19);
+
+ for (i = 0; i < emc->num_channels; i++) {
+ temp[i][0] = (value & 0x00ff) << 8;
+ temp[i][1] = (value & 0xff00) << 0;
+ value >>= 16;
+ }
+
+ /*
+ * Dev0 LSB.
+ */
+ value = tegra210_emc_mrr_read(emc, 2, 18);
+
+ for (i = 0; i < emc->num_channels; i++) {
+ temp[i][0] |= (value & 0x00ff) >> 0;
+ temp[i][1] |= (value & 0xff00) >> 8;
+ value >>= 16;
+ }
+ }
+
+ if (dvfs_pt1 || periodic_training_update) {
+ cval = tegra210_emc_actual_osc_clocks(last->run_clocks);
+ cval *= 1000000;
+ cval /= last_timing_rate_mhz * 2 * temp[0][0];
+ }
+
+ if (dvfs_pt1)
+ __INCREMENT_PTFV(C0D0U0, cval);
+ else if (dvfs_update)
+ __AVERAGE_PTFV(C0D0U0);
+ else if (periodic_training_update)
+ __WEIGHTED_UPDATE_PTFV(C0D0U0, cval);
+
+ if (dvfs_update || periodic_training_update) {
+ tdel = next->current_dram_clktree[C0D0U0] -
+ __MOVAVG_AC(next, C0D0U0);
+ tmdel = (tdel < 0) ? -1 * tdel : tdel;
+ adel = tmdel;
+
+ if (tmdel * 128 * next_timing_rate_mhz / 1000000 >
+ next->tree_margin)
+ next->current_dram_clktree[C0D0U0] =
+ __MOVAVG_AC(next, C0D0U0);
+ }
+
+ if (dvfs_pt1 || periodic_training_update) {
+ cval = tegra210_emc_actual_osc_clocks(last->run_clocks);
+ cval *= 1000000;
+ cval /= last_timing_rate_mhz * 2 * temp[0][1];
+ }
+
+ if (dvfs_pt1)
+ __INCREMENT_PTFV(C0D0U1, cval);
+ else if (dvfs_update)
+ __AVERAGE_PTFV(C0D0U1);
+ else if (periodic_training_update)
+ __WEIGHTED_UPDATE_PTFV(C0D0U1, cval);
+
+ if (dvfs_update || periodic_training_update) {
+ tdel = next->current_dram_clktree[C0D0U1] -
+ __MOVAVG_AC(next, C0D0U1);
+ tmdel = (tdel < 0) ? -1 * tdel : tdel;
+
+ if (tmdel > adel)
+ adel = tmdel;
+
+ if (tmdel * 128 * next_timing_rate_mhz / 1000000 >
+ next->tree_margin)
+ next->current_dram_clktree[C0D0U1] =
+ __MOVAVG_AC(next, C0D0U1);
+ }
+
+ if (emc->num_channels > 1) {
+ if (dvfs_pt1 || periodic_training_update) {
+ cval = tegra210_emc_actual_osc_clocks(last->run_clocks);
+ cval *= 1000000;
+ cval /= last_timing_rate_mhz * 2 * temp[1][0];
+ }
+
+ if (dvfs_pt1)
+ __INCREMENT_PTFV(C1D0U0, cval);
+ else if (dvfs_update)
+ __AVERAGE_PTFV(C1D0U0);
+ else if (periodic_training_update)
+ __WEIGHTED_UPDATE_PTFV(C1D0U0, cval);
+
+ if (dvfs_update || periodic_training_update) {
+ tdel = next->current_dram_clktree[C1D0U0] -
+ __MOVAVG_AC(next, C1D0U0);
+ tmdel = (tdel < 0) ? -1 * tdel : tdel;
+
+ if (tmdel > adel)
+ adel = tmdel;
+
+ if (tmdel * 128 * next_timing_rate_mhz / 1000000 >
+ next->tree_margin)
+ next->current_dram_clktree[C1D0U0] =
+ __MOVAVG_AC(next, C1D0U0);
+ }
+
+ if (dvfs_pt1 || periodic_training_update) {
+ cval = tegra210_emc_actual_osc_clocks(last->run_clocks);
+ cval *= 1000000;
+ cval /= last_timing_rate_mhz * 2 * temp[1][1];
+ }
+
+ if (dvfs_pt1)
+ __INCREMENT_PTFV(C1D0U1, cval);
+ else if (dvfs_update)
+ __AVERAGE_PTFV(C1D0U1);
+ else if (periodic_training_update)
+ __WEIGHTED_UPDATE_PTFV(C1D0U1, cval);
+
+ if (dvfs_update || periodic_training_update) {
+ tdel = next->current_dram_clktree[C1D0U1] -
+ __MOVAVG_AC(next, C1D0U1);
+ tmdel = (tdel < 0) ? -1 * tdel : tdel;
+
+ if (tmdel > adel)
+ adel = tmdel;
+
+ if (tmdel * 128 * next_timing_rate_mhz / 1000000 >
+ next->tree_margin)
+ next->current_dram_clktree[C1D0U1] =
+ __MOVAVG_AC(next, C1D0U1);
+ }
+ }
+
+ if (emc->num_devices < 2)
+ goto done;
+
+ /*
+ * Dev1 MSB.
+ */
+ if (dvfs_pt1 || periodic_training_update) {
+ value = tegra210_emc_mrr_read(emc, 1, 19);
+
+ for (i = 0; i < emc->num_channels; i++) {
+ temp[i][0] = (value & 0x00ff) << 8;
+ temp[i][1] = (value & 0xff00) << 0;
+ value >>= 16;
+ }
+
+ /*
+ * Dev1 LSB.
+ */
+ value = tegra210_emc_mrr_read(emc, 2, 18);
+
+ for (i = 0; i < emc->num_channels; i++) {
+ temp[i][0] |= (value & 0x00ff) >> 0;
+ temp[i][1] |= (value & 0xff00) >> 8;
+ value >>= 16;
+ }
+ }
+
+ if (dvfs_pt1 || periodic_training_update) {
+ cval = tegra210_emc_actual_osc_clocks(last->run_clocks);
+ cval *= 1000000;
+ cval /= last_timing_rate_mhz * 2 * temp[0][0];
+ }
+
+ if (dvfs_pt1)
+ __INCREMENT_PTFV(C0D1U0, cval);
+ else if (dvfs_update)
+ __AVERAGE_PTFV(C0D1U0);
+ else if (periodic_training_update)
+ __WEIGHTED_UPDATE_PTFV(C0D1U0, cval);
+
+ if (dvfs_update || periodic_training_update) {
+ tdel = next->current_dram_clktree[C0D1U0] -
+ __MOVAVG_AC(next, C0D1U0);
+ tmdel = (tdel < 0) ? -1 * tdel : tdel;
+
+ if (tmdel > adel)
+ adel = tmdel;
+
+ if (tmdel * 128 * next_timing_rate_mhz / 1000000 >
+ next->tree_margin)
+ next->current_dram_clktree[C0D1U0] =
+ __MOVAVG_AC(next, C0D1U0);
+ }
+
+ if (dvfs_pt1 || periodic_training_update) {
+ cval = tegra210_emc_actual_osc_clocks(last->run_clocks);
+ cval *= 1000000;
+ cval /= last_timing_rate_mhz * 2 * temp[0][1];
+ }
+
+ if (dvfs_pt1)
+ __INCREMENT_PTFV(C0D1U1, cval);
+ else if (dvfs_update)
+ __AVERAGE_PTFV(C0D1U1);
+ else if (periodic_training_update)
+ __WEIGHTED_UPDATE_PTFV(C0D1U1, cval);
+
+ if (dvfs_update || periodic_training_update) {
+ tdel = next->current_dram_clktree[C0D1U1] -
+ __MOVAVG_AC(next, C0D1U1);
+ tmdel = (tdel < 0) ? -1 * tdel : tdel;
+
+ if (tmdel > adel)
+ adel = tmdel;
+
+ if (tmdel * 128 * next_timing_rate_mhz / 1000000 >
+ next->tree_margin)
+ next->current_dram_clktree[C0D1U1] =
+ __MOVAVG_AC(next, C0D1U1);
+ }
+
+ if (emc->num_channels > 1) {
+ if (dvfs_pt1 || periodic_training_update) {
+ cval = tegra210_emc_actual_osc_clocks(last->run_clocks);
+ cval *= 1000000;
+ cval /= last_timing_rate_mhz * 2 * temp[1][0];
+ }
+
+ if (dvfs_pt1)
+ __INCREMENT_PTFV(C1D1U0, cval);
+ else if (dvfs_update)
+ __AVERAGE_PTFV(C1D1U0);
+ else if (periodic_training_update)
+ __WEIGHTED_UPDATE_PTFV(C1D1U0, cval);
+
+ if (dvfs_update || periodic_training_update) {
+ tdel = next->current_dram_clktree[C1D1U0] -
+ __MOVAVG_AC(next, C1D1U0);
+ tmdel = (tdel < 0) ? -1 * tdel : tdel;
+
+ if (tmdel > adel)
+ adel = tmdel;
+
+ if (tmdel * 128 * next_timing_rate_mhz / 1000000 >
+ next->tree_margin)
+ next->current_dram_clktree[C1D1U0] =
+ __MOVAVG_AC(next, C1D1U0);
+ }
+
+ if (dvfs_pt1 || periodic_training_update) {
+ cval = tegra210_emc_actual_osc_clocks(last->run_clocks);
+ cval *= 1000000;
+ cval /= last_timing_rate_mhz * 2 * temp[1][1];
+ }
+
+ if (dvfs_pt1)
+ __INCREMENT_PTFV(C1D1U1, cval);
+ else if (dvfs_update)
+ __AVERAGE_PTFV(C1D1U1);
+ else if (periodic_training_update)
+ __WEIGHTED_UPDATE_PTFV(C1D1U1, cval);
+
+ if (dvfs_update || periodic_training_update) {
+ tdel = next->current_dram_clktree[C1D1U1] -
+ __MOVAVG_AC(next, C1D1U1);
+ tmdel = (tdel < 0) ? -1 * tdel : tdel;
+
+ if (tmdel > adel)
+ adel = tmdel;
+
+ if (tmdel * 128 * next_timing_rate_mhz / 1000000 >
+ next->tree_margin)
+ next->current_dram_clktree[C1D1U1] =
+ __MOVAVG_AC(next, C1D1U1);
+ }
+ }
+
+done:
+ return adel;
+}
+
+static u32 periodic_compensation_handler(struct tegra210_emc *emc, u32 type,
+ struct tegra210_emc_timing *last,
+ struct tegra210_emc_timing *next)
+{
+#define __COPY_EMA(nt, lt, dev) \
+ ({ __MOVAVG(nt, dev) = __MOVAVG(lt, dev) * \
+ (nt)->ptfv_list[PTFV_DVFS_SAMPLES_INDEX]; })
+
+ u32 i, adel = 0, samples = next->ptfv_list[PTFV_DVFS_SAMPLES_INDEX];
+ u32 delay;
+
+ delay = tegra210_emc_actual_osc_clocks(last->run_clocks);
+ delay *= 1000;
+ delay = 2 + (delay / last->rate);
+
+ if (!next->periodic_training)
+ return 0;
+
+ if (type == DVFS_SEQUENCE) {
+ if (last->periodic_training &&
+ (next->ptfv_list[PTFV_CONFIG_CTRL_INDEX] &
+ PTFV_CONFIG_CTRL_USE_PREVIOUS_EMA)) {
+ /*
+ * If the previous frequency was using periodic
+ * calibration then we can reuse the previous
+ * frequencies EMA data.
+ */
+ __COPY_EMA(next, last, C0D0U0);
+ __COPY_EMA(next, last, C0D0U1);
+ __COPY_EMA(next, last, C1D0U0);
+ __COPY_EMA(next, last, C1D0U1);
+ __COPY_EMA(next, last, C0D1U0);
+ __COPY_EMA(next, last, C0D1U1);
+ __COPY_EMA(next, last, C1D1U0);
+ __COPY_EMA(next, last, C1D1U1);
+ } else {
+ /* Reset the EMA.*/
+ __MOVAVG(next, C0D0U0) = 0;
+ __MOVAVG(next, C0D0U1) = 0;
+ __MOVAVG(next, C1D0U0) = 0;
+ __MOVAVG(next, C1D0U1) = 0;
+ __MOVAVG(next, C0D1U0) = 0;
+ __MOVAVG(next, C0D1U1) = 0;
+ __MOVAVG(next, C1D1U0) = 0;
+ __MOVAVG(next, C1D1U1) = 0;
+
+ for (i = 0; i < samples; i++) {
+ tegra210_emc_start_periodic_compensation(emc);
+ udelay(delay);
+
+ /*
+ * Generate next sample of data.
+ */
+ adel = update_clock_tree_delay(emc, DVFS_PT1);
+ }
+ }
+
+ /*
+ * Seems like it should be part of the
+ * 'if (last_timing->periodic_training)' conditional
+ * since is already done for the else clause.
+ */
+ adel = update_clock_tree_delay(emc, DVFS_UPDATE);
+ }
+
+ if (type == PERIODIC_TRAINING_SEQUENCE) {
+ tegra210_emc_start_periodic_compensation(emc);
+ udelay(delay);
+
+ adel = update_clock_tree_delay(emc, PERIODIC_TRAINING_UPDATE);
+ }
+
+ return adel;
+}
+
+static u32 tegra210_emc_r21021_periodic_compensation(struct tegra210_emc *emc)
+{
+ u32 emc_cfg, emc_cfg_o, emc_cfg_update, del, value;
+ static const u32 list[] = {
+ EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_0,
+ EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_1,
+ EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_2,
+ EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_3,
+ EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_0,
+ EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_1,
+ EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_2,
+ EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_3,
+ EMC_DATA_BRLSHFT_0,
+ EMC_DATA_BRLSHFT_1
+ };
+ struct tegra210_emc_timing *last = emc->last;
+ unsigned int items = ARRAY_SIZE(list), i;
+ unsigned long delay;
+
+ if (last->periodic_training) {
+ emc_dbg(emc, PER_TRAIN, "Periodic training starting\n");
+
+ value = emc_readl(emc, EMC_DBG);
+ emc_cfg_o = emc_readl(emc, EMC_CFG);
+ emc_cfg = emc_cfg_o & ~(EMC_CFG_DYN_SELF_REF |
+ EMC_CFG_DRAM_ACPD |
+ EMC_CFG_DRAM_CLKSTOP_PD);
+
+
+ /*
+ * 1. Power optimizations should be off.
+ */
+ emc_writel(emc, emc_cfg, EMC_CFG);
+
+ /* Does emc_timing_update() for above changes. */
+ tegra210_emc_dll_disable(emc);
+
+ for (i = 0; i < emc->num_channels; i++)
+ tegra210_emc_wait_for_update(emc, i, EMC_EMC_STATUS,
+ EMC_EMC_STATUS_DRAM_IN_POWERDOWN_MASK,
+ 0);
+
+ for (i = 0; i < emc->num_channels; i++)
+ tegra210_emc_wait_for_update(emc, i, EMC_EMC_STATUS,
+ EMC_EMC_STATUS_DRAM_IN_SELF_REFRESH_MASK,
+ 0);
+
+ emc_cfg_update = value = emc_readl(emc, EMC_CFG_UPDATE);
+ value &= ~EMC_CFG_UPDATE_UPDATE_DLL_IN_UPDATE_MASK;
+ value |= (2 << EMC_CFG_UPDATE_UPDATE_DLL_IN_UPDATE_SHIFT);
+ emc_writel(emc, value, EMC_CFG_UPDATE);
+
+ /*
+ * 2. osc kick off - this assumes training and dvfs have set
+ * correct MR23.
+ */
+ tegra210_emc_start_periodic_compensation(emc);
+
+ /*
+ * 3. Let dram capture its clock tree delays.
+ */
+ delay = tegra210_emc_actual_osc_clocks(last->run_clocks);
+ delay *= 1000;
+ delay /= last->rate + 1;
+ udelay(delay);
+
+ /*
+ * 4. Check delta wrt previous values (save value if margin
+ * exceeds what is set in table).
+ */
+ del = periodic_compensation_handler(emc,
+ PERIODIC_TRAINING_SEQUENCE,
+ last, last);
+
+ /*
+ * 5. Apply compensation w.r.t. trained values (if clock tree
+ * has drifted more than the set margin).
+ */
+ if (last->tree_margin < ((del * 128 * (last->rate / 1000)) / 1000000)) {
+ for (i = 0; i < items; i++) {
+ value = tegra210_emc_compensate(last, list[i]);
+ emc_dbg(emc, EMA_WRITES, "0x%08x <= 0x%08x\n",
+ list[i], value);
+ emc_writel(emc, value, list[i]);
+ }
+ }
+
+ emc_writel(emc, emc_cfg_o, EMC_CFG);
+
+ /*
+ * 6. Timing update actally applies the new trimmers.
+ */
+ tegra210_emc_timing_update(emc);
+
+ /* 6.1. Restore the UPDATE_DLL_IN_UPDATE field. */
+ emc_writel(emc, emc_cfg_update, EMC_CFG_UPDATE);
+
+ /* 6.2. Restore the DLL. */
+ tegra210_emc_dll_enable(emc);
+ }
+
+ return 0;
+}
+
+/*
+ * Do the clock change sequence.
+ */
+static void tegra210_emc_r21021_set_clock(struct tegra210_emc *emc, u32 clksrc)
+{
+ /* state variables */
+ static bool fsp_for_next_freq;
+ /* constant configuration parameters */
+ const bool save_restore_clkstop_pd = true;
+ const u32 zqcal_before_cc_cutoff = 2400;
+ const bool cya_allow_ref_cc = false;
+ const bool cya_issue_pc_ref = false;
+ const bool opt_cc_short_zcal = true;
+ const bool ref_b4_sref_en = false;
+ const u32 tZQCAL_lpddr4 = 1000000;
+ const bool opt_short_zcal = true;
+ const bool opt_do_sw_qrst = true;
+ const u32 opt_dvfs_mode = MAN_SR;
+ /*
+ * This is the timing table for the source frequency. It does _not_
+ * necessarily correspond to the actual timing values in the EMC at the
+ * moment. If the boot BCT differs from the table then this can happen.
+ * However, we need it for accessing the dram_timings (which are not
+ * really registers) array for the current frequency.
+ */
+ struct tegra210_emc_timing *fake, *last = emc->last, *next = emc->next;
+ u32 tRTM, RP_war, R2P_war, TRPab_war, deltaTWATM, W2P_war, tRPST;
+ u32 mr13_flip_fspwr, mr13_flip_fspop, ramp_up_wait, ramp_down_wait;
+ u32 zq_wait_long, zq_latch_dvfs_wait_time, tZQCAL_lpddr4_fc_adj;
+ u32 emc_auto_cal_config, auto_cal_en, emc_cfg, emc_sel_dpd_ctrl;
+ u32 tFC_lpddr4 = 1000 * next->dram_timings[T_FC_LPDDR4];
+ u32 bg_reg_mode_change, enable_bglp_reg, enable_bg_reg;
+ bool opt_zcal_en_cc = false, is_lpddr3 = false;
+ bool compensate_trimmer_applicable = false;
+ u32 emc_dbg, emc_cfg_pipe_clk, emc_pin;
+ u32 src_clk_period, dst_clk_period; /* in picoseconds */
+ bool shared_zq_resistor = false;
+ u32 value, dram_type;
+ u32 opt_dll_mode = 0;
+ unsigned long delay;
+ unsigned int i;
+
+ emc_dbg(emc, INFO, "Running clock change.\n");
+
+ /* XXX fake == last */
+ fake = tegra210_emc_find_timing(emc, last->rate * 1000UL);
+ fsp_for_next_freq = !fsp_for_next_freq;
+
+ value = emc_readl(emc, EMC_FBIO_CFG5) & EMC_FBIO_CFG5_DRAM_TYPE_MASK;
+ dram_type = value >> EMC_FBIO_CFG5_DRAM_TYPE_SHIFT;
+
+ if (last->burst_regs[EMC_ZCAL_WAIT_CNT_INDEX] & BIT(31))
+ shared_zq_resistor = true;
+
+ if ((next->burst_regs[EMC_ZCAL_INTERVAL_INDEX] != 0 &&
+ last->burst_regs[EMC_ZCAL_INTERVAL_INDEX] == 0) ||
+ dram_type == DRAM_TYPE_LPDDR4)
+ opt_zcal_en_cc = true;
+
+ if (dram_type == DRAM_TYPE_DDR3)
+ opt_dll_mode = tegra210_emc_get_dll_state(next);
+
+ if ((next->burst_regs[EMC_FBIO_CFG5_INDEX] & BIT(25)) &&
+ (dram_type == DRAM_TYPE_LPDDR2))
+ is_lpddr3 = true;
+
+ emc_readl(emc, EMC_CFG);
+ emc_readl(emc, EMC_AUTO_CAL_CONFIG);
+
+ src_clk_period = 1000000000 / last->rate;
+ dst_clk_period = 1000000000 / next->rate;
+
+ if (dst_clk_period <= zqcal_before_cc_cutoff)
+ tZQCAL_lpddr4_fc_adj = tZQCAL_lpddr4 - tFC_lpddr4;
+ else
+ tZQCAL_lpddr4_fc_adj = tZQCAL_lpddr4;
+
+ tZQCAL_lpddr4_fc_adj /= dst_clk_period;
+
+ emc_dbg = emc_readl(emc, EMC_DBG);
+ emc_pin = emc_readl(emc, EMC_PIN);
+ emc_cfg_pipe_clk = emc_readl(emc, EMC_CFG_PIPE_CLK);
+
+ emc_cfg = next->burst_regs[EMC_CFG_INDEX];
+ emc_cfg &= ~(EMC_CFG_DYN_SELF_REF | EMC_CFG_DRAM_ACPD |
+ EMC_CFG_DRAM_CLKSTOP_SR | EMC_CFG_DRAM_CLKSTOP_PD);
+ emc_sel_dpd_ctrl = next->emc_sel_dpd_ctrl;
+ emc_sel_dpd_ctrl &= ~(EMC_SEL_DPD_CTRL_CLK_SEL_DPD_EN |
+ EMC_SEL_DPD_CTRL_CA_SEL_DPD_EN |
+ EMC_SEL_DPD_CTRL_RESET_SEL_DPD_EN |
+ EMC_SEL_DPD_CTRL_ODT_SEL_DPD_EN |
+ EMC_SEL_DPD_CTRL_DATA_SEL_DPD_EN);
+
+ emc_dbg(emc, INFO, "Clock change version: %d\n",
+ DVFS_CLOCK_CHANGE_VERSION);
+ emc_dbg(emc, INFO, "DRAM type = %d\n", dram_type);
+ emc_dbg(emc, INFO, "DRAM dev #: %u\n", emc->num_devices);
+ emc_dbg(emc, INFO, "Next EMC clksrc: 0x%08x\n", clksrc);
+ emc_dbg(emc, INFO, "DLL clksrc: 0x%08x\n", next->dll_clk_src);
+ emc_dbg(emc, INFO, "last rate: %u, next rate %u\n", last->rate,
+ next->rate);
+ emc_dbg(emc, INFO, "last period: %u, next period: %u\n",
+ src_clk_period, dst_clk_period);
+ emc_dbg(emc, INFO, " shared_zq_resistor: %d\n", !!shared_zq_resistor);
+ emc_dbg(emc, INFO, " num_channels: %u\n", emc->num_channels);
+ emc_dbg(emc, INFO, " opt_dll_mode: %d\n", opt_dll_mode);
+
+ /*
+ * Step 1:
+ * Pre DVFS SW sequence.
+ */
+ emc_dbg(emc, STEPS, "Step 1\n");
+ emc_dbg(emc, STEPS, "Step 1.1: Disable DLL temporarily.\n");
+
+ value = emc_readl(emc, EMC_CFG_DIG_DLL);
+ value &= ~EMC_CFG_DIG_DLL_CFG_DLL_EN;
+ emc_writel(emc, value, EMC_CFG_DIG_DLL);
+
+ tegra210_emc_timing_update(emc);
+
+ for (i = 0; i < emc->num_channels; i++)
+ tegra210_emc_wait_for_update(emc, i, EMC_CFG_DIG_DLL,
+ EMC_CFG_DIG_DLL_CFG_DLL_EN, 0);
+
+ emc_dbg(emc, STEPS, "Step 1.2: Disable AUTOCAL temporarily.\n");
+
+ emc_auto_cal_config = next->emc_auto_cal_config;
+ auto_cal_en = emc_auto_cal_config & EMC_AUTO_CAL_CONFIG_AUTO_CAL_ENABLE;
+ emc_auto_cal_config &= ~EMC_AUTO_CAL_CONFIG_AUTO_CAL_START;
+ emc_auto_cal_config |= EMC_AUTO_CAL_CONFIG_AUTO_CAL_MEASURE_STALL;
+ emc_auto_cal_config |= EMC_AUTO_CAL_CONFIG_AUTO_CAL_UPDATE_STALL;
+ emc_auto_cal_config |= auto_cal_en;
+ emc_writel(emc, emc_auto_cal_config, EMC_AUTO_CAL_CONFIG);
+ emc_readl(emc, EMC_AUTO_CAL_CONFIG); /* Flush write. */
+
+ emc_dbg(emc, STEPS, "Step 1.3: Disable other power features.\n");
+
+ tegra210_emc_set_shadow_bypass(emc, ACTIVE);
+ emc_writel(emc, emc_cfg, EMC_CFG);
+ emc_writel(emc, emc_sel_dpd_ctrl, EMC_SEL_DPD_CTRL);
+ tegra210_emc_set_shadow_bypass(emc, ASSEMBLY);
+
+ if (next->periodic_training) {
+ tegra210_emc_reset_dram_clktree_values(next);
+
+ for (i = 0; i < emc->num_channels; i++)
+ tegra210_emc_wait_for_update(emc, i, EMC_EMC_STATUS,
+ EMC_EMC_STATUS_DRAM_IN_POWERDOWN_MASK,
+ 0);
+
+ for (i = 0; i < emc->num_channels; i++)
+ tegra210_emc_wait_for_update(emc, i, EMC_EMC_STATUS,
+ EMC_EMC_STATUS_DRAM_IN_SELF_REFRESH_MASK,
+ 0);
+
+ tegra210_emc_start_periodic_compensation(emc);
+
+ delay = 1000 * tegra210_emc_actual_osc_clocks(last->run_clocks);
+ udelay((delay / last->rate) + 2);
+
+ value = periodic_compensation_handler(emc, DVFS_SEQUENCE, fake,
+ next);
+ value = (value * 128 * next->rate / 1000) / 1000000;
+
+ if (next->periodic_training && value > next->tree_margin)
+ compensate_trimmer_applicable = true;
+ }
+
+ emc_writel(emc, EMC_INTSTATUS_CLKCHANGE_COMPLETE, EMC_INTSTATUS);
+ tegra210_emc_set_shadow_bypass(emc, ACTIVE);
+ emc_writel(emc, emc_cfg, EMC_CFG);
+ emc_writel(emc, emc_sel_dpd_ctrl, EMC_SEL_DPD_CTRL);
+ emc_writel(emc, emc_cfg_pipe_clk | EMC_CFG_PIPE_CLK_CLK_ALWAYS_ON,
+ EMC_CFG_PIPE_CLK);
+ emc_writel(emc, next->emc_fdpd_ctrl_cmd_no_ramp &
+ ~EMC_FDPD_CTRL_CMD_NO_RAMP_CMD_DPD_NO_RAMP_ENABLE,
+ EMC_FDPD_CTRL_CMD_NO_RAMP);
+
+ bg_reg_mode_change =
+ ((next->burst_regs[EMC_PMACRO_BG_BIAS_CTRL_0_INDEX] &
+ EMC_PMACRO_BG_BIAS_CTRL_0_BGLP_E_PWRD) ^
+ (last->burst_regs[EMC_PMACRO_BG_BIAS_CTRL_0_INDEX] &
+ EMC_PMACRO_BG_BIAS_CTRL_0_BGLP_E_PWRD)) ||
+ ((next->burst_regs[EMC_PMACRO_BG_BIAS_CTRL_0_INDEX] &
+ EMC_PMACRO_BG_BIAS_CTRL_0_BG_E_PWRD) ^
+ (last->burst_regs[EMC_PMACRO_BG_BIAS_CTRL_0_INDEX] &
+ EMC_PMACRO_BG_BIAS_CTRL_0_BG_E_PWRD));
+ enable_bglp_reg =
+ (next->burst_regs[EMC_PMACRO_BG_BIAS_CTRL_0_INDEX] &
+ EMC_PMACRO_BG_BIAS_CTRL_0_BGLP_E_PWRD) == 0;
+ enable_bg_reg =
+ (next->burst_regs[EMC_PMACRO_BG_BIAS_CTRL_0_INDEX] &
+ EMC_PMACRO_BG_BIAS_CTRL_0_BG_E_PWRD) == 0;
+
+ if (bg_reg_mode_change) {
+ if (enable_bg_reg)
+ emc_writel(emc, last->burst_regs
+ [EMC_PMACRO_BG_BIAS_CTRL_0_INDEX] &
+ ~EMC_PMACRO_BG_BIAS_CTRL_0_BG_E_PWRD,
+ EMC_PMACRO_BG_BIAS_CTRL_0);
+
+ if (enable_bglp_reg)
+ emc_writel(emc, last->burst_regs
+ [EMC_PMACRO_BG_BIAS_CTRL_0_INDEX] &
+ ~EMC_PMACRO_BG_BIAS_CTRL_0_BGLP_E_PWRD,
+ EMC_PMACRO_BG_BIAS_CTRL_0);
+ }
+
+ /* Check if we need to turn on VREF generator. */
+ if ((((last->burst_regs[EMC_PMACRO_DATA_PAD_TX_CTRL_INDEX] &
+ EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQ_E_IVREF) == 0) &&
+ ((next->burst_regs[EMC_PMACRO_DATA_PAD_TX_CTRL_INDEX] &
+ EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQ_E_IVREF) == 1)) ||
+ (((last->burst_regs[EMC_PMACRO_DATA_PAD_TX_CTRL_INDEX] &
+ EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQS_E_IVREF) == 0) &&
+ ((next->burst_regs[EMC_PMACRO_DATA_PAD_TX_CTRL_INDEX] &
+ EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQS_E_IVREF) != 0))) {
+ u32 pad_tx_ctrl =
+ next->burst_regs[EMC_PMACRO_DATA_PAD_TX_CTRL_INDEX];
+ u32 last_pad_tx_ctrl =
+ last->burst_regs[EMC_PMACRO_DATA_PAD_TX_CTRL_INDEX];
+ u32 next_dq_e_ivref, next_dqs_e_ivref;
+
+ next_dqs_e_ivref = pad_tx_ctrl &
+ EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQS_E_IVREF;
+ next_dq_e_ivref = pad_tx_ctrl &
+ EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQ_E_IVREF;
+ value = (last_pad_tx_ctrl &
+ ~EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQ_E_IVREF &
+ ~EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQS_E_IVREF) |
+ next_dq_e_ivref | next_dqs_e_ivref;
+ emc_writel(emc, value, EMC_PMACRO_DATA_PAD_TX_CTRL);
+ udelay(1);
+ } else if (bg_reg_mode_change) {
+ udelay(1);
+ }
+
+ tegra210_emc_set_shadow_bypass(emc, ASSEMBLY);
+
+ /*
+ * Step 2:
+ * Prelock the DLL.
+ */
+ emc_dbg(emc, STEPS, "Step 2\n");
+
+ if (next->burst_regs[EMC_CFG_DIG_DLL_INDEX] &
+ EMC_CFG_DIG_DLL_CFG_DLL_EN) {
+ emc_dbg(emc, INFO, "Prelock enabled for target frequency.\n");
+ value = tegra210_emc_dll_prelock(emc, clksrc);
+ emc_dbg(emc, INFO, "DLL out: 0x%03x\n", value);
+ } else {
+ emc_dbg(emc, INFO, "Disabling DLL for target frequency.\n");
+ tegra210_emc_dll_disable(emc);
+ }
+
+ /*
+ * Step 3:
+ * Prepare autocal for the clock change.
+ */
+ emc_dbg(emc, STEPS, "Step 3\n");
+
+ tegra210_emc_set_shadow_bypass(emc, ACTIVE);
+ emc_writel(emc, next->emc_auto_cal_config2, EMC_AUTO_CAL_CONFIG2);
+ emc_writel(emc, next->emc_auto_cal_config3, EMC_AUTO_CAL_CONFIG3);
+ emc_writel(emc, next->emc_auto_cal_config4, EMC_AUTO_CAL_CONFIG4);
+ emc_writel(emc, next->emc_auto_cal_config5, EMC_AUTO_CAL_CONFIG5);
+ emc_writel(emc, next->emc_auto_cal_config6, EMC_AUTO_CAL_CONFIG6);
+ emc_writel(emc, next->emc_auto_cal_config7, EMC_AUTO_CAL_CONFIG7);
+ emc_writel(emc, next->emc_auto_cal_config8, EMC_AUTO_CAL_CONFIG8);
+ tegra210_emc_set_shadow_bypass(emc, ASSEMBLY);
+
+ emc_auto_cal_config |= (EMC_AUTO_CAL_CONFIG_AUTO_CAL_COMPUTE_START |
+ auto_cal_en);
+ emc_writel(emc, emc_auto_cal_config, EMC_AUTO_CAL_CONFIG);
+
+ /*
+ * Step 4:
+ * Update EMC_CFG. (??)
+ */
+ emc_dbg(emc, STEPS, "Step 4\n");
+
+ if (src_clk_period > 50000 && dram_type == DRAM_TYPE_LPDDR4)
+ ccfifo_writel(emc, 1, EMC_SELF_REF, 0);
+ else
+ emc_writel(emc, next->emc_cfg_2, EMC_CFG_2);
+
+ /*
+ * Step 5:
+ * Prepare reference variables for ZQCAL regs.
+ */
+ emc_dbg(emc, STEPS, "Step 5\n");
+
+ if (dram_type == DRAM_TYPE_LPDDR4)
+ zq_wait_long = max((u32)1, div_o3(1000000, dst_clk_period));
+ else if (dram_type == DRAM_TYPE_LPDDR2 || is_lpddr3)
+ zq_wait_long = max(next->min_mrs_wait,
+ div_o3(360000, dst_clk_period)) + 4;
+ else if (dram_type == DRAM_TYPE_DDR3)
+ zq_wait_long = max((u32)256,
+ div_o3(320000, dst_clk_period) + 2);
+ else
+ zq_wait_long = 0;
+
+ /*
+ * Step 6:
+ * Training code - removed.
+ */
+ emc_dbg(emc, STEPS, "Step 6\n");
+
+ /*
+ * Step 7:
+ * Program FSP reference registers and send MRWs to new FSPWR.
+ */
+ emc_dbg(emc, STEPS, "Step 7\n");
+ emc_dbg(emc, SUB_STEPS, "Step 7.1: Bug 200024907 - Patch RP R2P");
+
+ /* WAR 200024907 */
+ if (dram_type == DRAM_TYPE_LPDDR4) {
+ u32 nRTP = 16;
+
+ if (src_clk_period >= 1000000 / 1866) /* 535.91 ps */
+ nRTP = 14;
+
+ if (src_clk_period >= 1000000 / 1600) /* 625.00 ps */
+ nRTP = 12;
+
+ if (src_clk_period >= 1000000 / 1333) /* 750.19 ps */
+ nRTP = 10;
+
+ if (src_clk_period >= 1000000 / 1066) /* 938.09 ps */
+ nRTP = 8;
+
+ deltaTWATM = max_t(u32, div_o3(7500, src_clk_period), 8);
+
+ /*
+ * Originally there was a + .5 in the tRPST calculation.
+ * However since we can't do FP in the kernel and the tRTM
+ * computation was in a floating point ceiling function, adding
+ * one to tRTP should be ok. There is no other source of non
+ * integer values, so the result was always going to be
+ * something for the form: f_ceil(N + .5) = N + 1;
+ */
+ tRPST = (last->emc_mrw & 0x80) >> 7;
+ tRTM = fake->dram_timings[RL] + div_o3(3600, src_clk_period) +
+ max_t(u32, div_o3(7500, src_clk_period), 8) + tRPST +
+ 1 + nRTP;
+
+ emc_dbg(emc, INFO, "tRTM = %u, EMC_RP = %u\n", tRTM,
+ next->burst_regs[EMC_RP_INDEX]);
+
+ if (last->burst_regs[EMC_RP_INDEX] < tRTM) {
+ if (tRTM > (last->burst_regs[EMC_R2P_INDEX] +
+ last->burst_regs[EMC_RP_INDEX])) {
+ R2P_war = tRTM - last->burst_regs[EMC_RP_INDEX];
+ RP_war = last->burst_regs[EMC_RP_INDEX];
+ TRPab_war = last->burst_regs[EMC_TRPAB_INDEX];
+
+ if (R2P_war > 63) {
+ RP_war = R2P_war +
+ last->burst_regs[EMC_RP_INDEX] - 63;
+
+ if (TRPab_war < RP_war)
+ TRPab_war = RP_war;
+
+ R2P_war = 63;
+ }
+ } else {
+ R2P_war = last->burst_regs[EMC_R2P_INDEX];
+ RP_war = last->burst_regs[EMC_RP_INDEX];
+ TRPab_war = last->burst_regs[EMC_TRPAB_INDEX];
+ }
+
+ if (RP_war < deltaTWATM) {
+ W2P_war = last->burst_regs[EMC_W2P_INDEX]
+ + deltaTWATM - RP_war;
+ if (W2P_war > 63) {
+ RP_war = RP_war + W2P_war - 63;
+ if (TRPab_war < RP_war)
+ TRPab_war = RP_war;
+ W2P_war = 63;
+ }
+ } else {
+ W2P_war = last->burst_regs[
+ EMC_W2P_INDEX];
+ }
+
+ if ((last->burst_regs[EMC_W2P_INDEX] ^ W2P_war) ||
+ (last->burst_regs[EMC_R2P_INDEX] ^ R2P_war) ||
+ (last->burst_regs[EMC_RP_INDEX] ^ RP_war) ||
+ (last->burst_regs[EMC_TRPAB_INDEX] ^ TRPab_war)) {
+ emc_writel(emc, RP_war, EMC_RP);
+ emc_writel(emc, R2P_war, EMC_R2P);
+ emc_writel(emc, W2P_war, EMC_W2P);
+ emc_writel(emc, TRPab_war, EMC_TRPAB);
+ }
+
+ tegra210_emc_timing_update(emc);
+ } else {
+ emc_dbg(emc, INFO, "Skipped WAR\n");
+ }
+ }
+
+ if (!fsp_for_next_freq) {
+ mr13_flip_fspwr = (next->emc_mrw3 & 0xffffff3f) | 0x80;
+ mr13_flip_fspop = (next->emc_mrw3 & 0xffffff3f) | 0x00;
+ } else {
+ mr13_flip_fspwr = (next->emc_mrw3 & 0xffffff3f) | 0x40;
+ mr13_flip_fspop = (next->emc_mrw3 & 0xffffff3f) | 0xc0;
+ }
+
+ if (dram_type == DRAM_TYPE_LPDDR4) {
+ emc_writel(emc, mr13_flip_fspwr, EMC_MRW3);
+ emc_writel(emc, next->emc_mrw, EMC_MRW);
+ emc_writel(emc, next->emc_mrw2, EMC_MRW2);
+ }
+
+ /*
+ * Step 8:
+ * Program the shadow registers.
+ */
+ emc_dbg(emc, STEPS, "Step 8\n");
+ emc_dbg(emc, SUB_STEPS, "Writing burst_regs\n");
+
+ for (i = 0; i < next->num_burst; i++) {
+ const u16 *offsets = emc->offsets->burst;
+ u16 offset;
+
+ if (!offsets[i])
+ continue;
+
+ value = next->burst_regs[i];
+ offset = offsets[i];
+
+ if (dram_type != DRAM_TYPE_LPDDR4 &&
+ (offset == EMC_MRW6 || offset == EMC_MRW7 ||
+ offset == EMC_MRW8 || offset == EMC_MRW9 ||
+ offset == EMC_MRW10 || offset == EMC_MRW11 ||
+ offset == EMC_MRW12 || offset == EMC_MRW13 ||
+ offset == EMC_MRW14 || offset == EMC_MRW15 ||
+ offset == EMC_TRAINING_CTRL))
+ continue;
+
+ /* Pain... And suffering. */
+ if (offset == EMC_CFG) {
+ value &= ~EMC_CFG_DRAM_ACPD;
+ value &= ~EMC_CFG_DYN_SELF_REF;
+
+ if (dram_type == DRAM_TYPE_LPDDR4) {
+ value &= ~EMC_CFG_DRAM_CLKSTOP_SR;
+ value &= ~EMC_CFG_DRAM_CLKSTOP_PD;
+ }
+ } else if (offset == EMC_MRS_WAIT_CNT &&
+ dram_type == DRAM_TYPE_LPDDR2 &&
+ opt_zcal_en_cc && !opt_cc_short_zcal &&
+ opt_short_zcal) {
+ value = (value & ~(EMC_MRS_WAIT_CNT_SHORT_WAIT_MASK <<
+ EMC_MRS_WAIT_CNT_SHORT_WAIT_SHIFT)) |
+ ((zq_wait_long & EMC_MRS_WAIT_CNT_SHORT_WAIT_MASK) <<
+ EMC_MRS_WAIT_CNT_SHORT_WAIT_SHIFT);
+ } else if (offset == EMC_ZCAL_WAIT_CNT &&
+ dram_type == DRAM_TYPE_DDR3 && opt_zcal_en_cc &&
+ !opt_cc_short_zcal && opt_short_zcal) {
+ value = (value & ~(EMC_ZCAL_WAIT_CNT_ZCAL_WAIT_CNT_MASK <<
+ EMC_ZCAL_WAIT_CNT_ZCAL_WAIT_CNT_SHIFT)) |
+ ((zq_wait_long & EMC_ZCAL_WAIT_CNT_ZCAL_WAIT_CNT_MASK) <<
+ EMC_MRS_WAIT_CNT_SHORT_WAIT_SHIFT);
+ } else if (offset == EMC_ZCAL_INTERVAL && opt_zcal_en_cc) {
+ value = 0; /* EMC_ZCAL_INTERVAL reset value. */
+ } else if (offset == EMC_PMACRO_AUTOCAL_CFG_COMMON) {
+ value |= EMC_PMACRO_AUTOCAL_CFG_COMMON_E_CAL_BYPASS_DVFS;
+ } else if (offset == EMC_PMACRO_DATA_PAD_TX_CTRL) {
+ value &= ~(EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQSP_TX_E_DCC |
+ EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQSN_TX_E_DCC |
+ EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQ_TX_E_DCC |
+ EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_CMD_TX_E_DCC);
+ } else if (offset == EMC_PMACRO_CMD_PAD_TX_CTRL) {
+ value |= EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQ_TX_DRVFORCEON;
+ value &= ~(EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQSP_TX_E_DCC |
+ EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQSN_TX_E_DCC |
+ EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQ_TX_E_DCC |
+ EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_CMD_TX_E_DCC);
+ } else if (offset == EMC_PMACRO_BRICK_CTRL_RFU1) {
+ value &= 0xf800f800;
+ } else if (offset == EMC_PMACRO_COMMON_PAD_TX_CTRL) {
+ value &= 0xfffffff0;
+ }
+
+ emc_writel(emc, value, offset);
+ }
+
+ /* SW addition: do EMC refresh adjustment here. */
+ tegra210_emc_adjust_timing(emc, next);
+
+ if (dram_type == DRAM_TYPE_LPDDR4) {
+ value = (23 << EMC_MRW_MRW_MA_SHIFT) |
+ (next->run_clocks & EMC_MRW_MRW_OP_MASK);
+ emc_writel(emc, value, EMC_MRW);
+ }
+
+ /* Per channel burst registers. */
+ emc_dbg(emc, SUB_STEPS, "Writing burst_regs_per_ch\n");
+
+ for (i = 0; i < next->num_burst_per_ch; i++) {
+ const struct tegra210_emc_per_channel_regs *burst =
+ emc->offsets->burst_per_channel;
+
+ if (!burst[i].offset)
+ continue;
+
+ if (dram_type != DRAM_TYPE_LPDDR4 &&
+ (burst[i].offset == EMC_MRW6 ||
+ burst[i].offset == EMC_MRW7 ||
+ burst[i].offset == EMC_MRW8 ||
+ burst[i].offset == EMC_MRW9 ||
+ burst[i].offset == EMC_MRW10 ||
+ burst[i].offset == EMC_MRW11 ||
+ burst[i].offset == EMC_MRW12 ||
+ burst[i].offset == EMC_MRW13 ||
+ burst[i].offset == EMC_MRW14 ||
+ burst[i].offset == EMC_MRW15))
+ continue;
+
+ /* Filter out second channel if not in DUAL_CHANNEL mode. */
+ if (emc->num_channels < 2 && burst[i].bank >= 1)
+ continue;
+
+ emc_dbg(emc, REG_LISTS, "(%u) 0x%08x => 0x%08x\n", i,
+ next->burst_reg_per_ch[i], burst[i].offset);
+ emc_channel_writel(emc, burst[i].bank,
+ next->burst_reg_per_ch[i],
+ burst[i].offset);
+ }
+
+ /* Vref regs. */
+ emc_dbg(emc, SUB_STEPS, "Writing vref_regs\n");
+
+ for (i = 0; i < next->vref_num; i++) {
+ const struct tegra210_emc_per_channel_regs *vref =
+ emc->offsets->vref_per_channel;
+
+ if (!vref[i].offset)
+ continue;
+
+ if (emc->num_channels < 2 && vref[i].bank >= 1)
+ continue;
+
+ emc_dbg(emc, REG_LISTS, "(%u) 0x%08x => 0x%08x\n", i,
+ next->vref_perch_regs[i], vref[i].offset);
+ emc_channel_writel(emc, vref[i].bank, next->vref_perch_regs[i],
+ vref[i].offset);
+ }
+
+ /* Trimmers. */
+ emc_dbg(emc, SUB_STEPS, "Writing trim_regs\n");
+
+ for (i = 0; i < next->num_trim; i++) {
+ const u16 *offsets = emc->offsets->trim;
+
+ if (!offsets[i])
+ continue;
+
+ if (compensate_trimmer_applicable &&
+ (offsets[i] == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_0 ||
+ offsets[i] == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_1 ||
+ offsets[i] == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_2 ||
+ offsets[i] == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_3 ||
+ offsets[i] == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_0 ||
+ offsets[i] == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_1 ||
+ offsets[i] == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_2 ||
+ offsets[i] == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_3 ||
+ offsets[i] == EMC_DATA_BRLSHFT_0 ||
+ offsets[i] == EMC_DATA_BRLSHFT_1)) {
+ value = tegra210_emc_compensate(next, offsets[i]);
+ emc_dbg(emc, REG_LISTS, "(%u) 0x%08x => 0x%08x\n", i,
+ value, offsets[i]);
+ emc_dbg(emc, EMA_WRITES, "0x%08x <= 0x%08x\n",
+ (u32)(u64)offsets[i], value);
+ emc_writel(emc, value, offsets[i]);
+ } else {
+ emc_dbg(emc, REG_LISTS, "(%u) 0x%08x => 0x%08x\n", i,
+ next->trim_regs[i], offsets[i]);
+ emc_writel(emc, next->trim_regs[i], offsets[i]);
+ }
+ }
+
+ /* Per channel trimmers. */
+ emc_dbg(emc, SUB_STEPS, "Writing trim_regs_per_ch\n");
+
+ for (i = 0; i < next->num_trim_per_ch; i++) {
+ const struct tegra210_emc_per_channel_regs *trim =
+ &emc->offsets->trim_per_channel[0];
+ unsigned int offset;
+
+ if (!trim[i].offset)
+ continue;
+
+ if (emc->num_channels < 2 && trim[i].bank >= 1)
+ continue;
+
+ offset = trim[i].offset;
+
+ if (compensate_trimmer_applicable &&
+ (offset == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_0 ||
+ offset == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_1 ||
+ offset == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_2 ||
+ offset == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_3 ||
+ offset == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_0 ||
+ offset == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_1 ||
+ offset == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_2 ||
+ offset == EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_3 ||
+ offset == EMC_DATA_BRLSHFT_0 ||
+ offset == EMC_DATA_BRLSHFT_1)) {
+ value = tegra210_emc_compensate(next, offset);
+ emc_dbg(emc, REG_LISTS, "(%u) 0x%08x => 0x%08x\n", i,
+ value, offset);
+ emc_dbg(emc, EMA_WRITES, "0x%08x <= 0x%08x\n", offset,
+ value);
+ emc_channel_writel(emc, trim[i].bank, value, offset);
+ } else {
+ emc_dbg(emc, REG_LISTS, "(%u) 0x%08x => 0x%08x\n", i,
+ next->trim_perch_regs[i], offset);
+ emc_channel_writel(emc, trim[i].bank,
+ next->trim_perch_regs[i], offset);
+ }
+ }
+
+ emc_dbg(emc, SUB_STEPS, "Writing burst_mc_regs\n");
+
+ for (i = 0; i < next->num_mc_regs; i++) {
+ const u16 *offsets = emc->offsets->burst_mc;
+ u32 *values = next->burst_mc_regs;
+
+ emc_dbg(emc, REG_LISTS, "(%u) 0x%08x => 0x%08x\n", i,
+ values[i], offsets[i]);
+ mc_writel(emc->mc, values[i], offsets[i]);
+ }
+
+ /* Registers to be programmed on the faster clock. */
+ if (next->rate < last->rate) {
+ const u16 *la = emc->offsets->la_scale;
+
+ emc_dbg(emc, SUB_STEPS, "Writing la_scale_regs\n");
+
+ for (i = 0; i < next->num_up_down; i++) {
+ emc_dbg(emc, REG_LISTS, "(%u) 0x%08x => 0x%08x\n", i,
+ next->la_scale_regs[i], la[i]);
+ mc_writel(emc->mc, next->la_scale_regs[i], la[i]);
+ }
+ }
+
+ /* Flush all the burst register writes. */
+ mc_readl(emc->mc, MC_EMEM_ADR_CFG);
+
+ /*
+ * Step 9:
+ * LPDDR4 section A.
+ */
+ emc_dbg(emc, STEPS, "Step 9\n");
+
+ value = next->burst_regs[EMC_ZCAL_WAIT_CNT_INDEX];
+ value &= ~EMC_ZCAL_WAIT_CNT_ZCAL_WAIT_CNT_MASK;
+
+ if (dram_type == DRAM_TYPE_LPDDR4) {
+ emc_writel(emc, 0, EMC_ZCAL_INTERVAL);
+ emc_writel(emc, value, EMC_ZCAL_WAIT_CNT);
+
+ value = emc_dbg | (EMC_DBG_WRITE_MUX_ACTIVE |
+ EMC_DBG_WRITE_ACTIVE_ONLY);
+
+ emc_writel(emc, value, EMC_DBG);
+ emc_writel(emc, 0, EMC_ZCAL_INTERVAL);
+ emc_writel(emc, emc_dbg, EMC_DBG);
+ }
+
+ /*
+ * Step 10:
+ * LPDDR4 and DDR3 common section.
+ */
+ emc_dbg(emc, STEPS, "Step 10\n");
+
+ if (opt_dvfs_mode == MAN_SR || dram_type == DRAM_TYPE_LPDDR4) {
+ if (dram_type == DRAM_TYPE_LPDDR4)
+ ccfifo_writel(emc, 0x101, EMC_SELF_REF, 0);
+ else
+ ccfifo_writel(emc, 0x1, EMC_SELF_REF, 0);
+
+ if (dram_type == DRAM_TYPE_LPDDR4 &&
+ dst_clk_period <= zqcal_before_cc_cutoff) {
+ ccfifo_writel(emc, mr13_flip_fspwr ^ 0x40, EMC_MRW3, 0);
+ ccfifo_writel(emc, (next->burst_regs[EMC_MRW6_INDEX] &
+ 0xFFFF3F3F) |
+ (last->burst_regs[EMC_MRW6_INDEX] &
+ 0x0000C0C0), EMC_MRW6, 0);
+ ccfifo_writel(emc, (next->burst_regs[EMC_MRW14_INDEX] &
+ 0xFFFF0707) |
+ (last->burst_regs[EMC_MRW14_INDEX] &
+ 0x00003838), EMC_MRW14, 0);
+
+ if (emc->num_devices > 1) {
+ ccfifo_writel(emc,
+ (next->burst_regs[EMC_MRW7_INDEX] &
+ 0xFFFF3F3F) |
+ (last->burst_regs[EMC_MRW7_INDEX] &
+ 0x0000C0C0), EMC_MRW7, 0);
+ ccfifo_writel(emc,
+ (next->burst_regs[EMC_MRW15_INDEX] &
+ 0xFFFF0707) |
+ (last->burst_regs[EMC_MRW15_INDEX] &
+ 0x00003838), EMC_MRW15, 0);
+ }
+
+ if (opt_zcal_en_cc) {
+ if (emc->num_devices < 2)
+ ccfifo_writel(emc,
+ 2UL << EMC_ZQ_CAL_DEV_SEL_SHIFT
+ | EMC_ZQ_CAL_ZQ_CAL_CMD,
+ EMC_ZQ_CAL, 0);
+ else if (shared_zq_resistor)
+ ccfifo_writel(emc,
+ 2UL << EMC_ZQ_CAL_DEV_SEL_SHIFT
+ | EMC_ZQ_CAL_ZQ_CAL_CMD,
+ EMC_ZQ_CAL, 0);
+ else
+ ccfifo_writel(emc,
+ EMC_ZQ_CAL_ZQ_CAL_CMD,
+ EMC_ZQ_CAL, 0);
+ }
+ }
+ }
+
+ if (dram_type == DRAM_TYPE_LPDDR4) {
+ value = (1000 * fake->dram_timings[T_RP]) / src_clk_period;
+ ccfifo_writel(emc, mr13_flip_fspop | 0x8, EMC_MRW3, value);
+ ccfifo_writel(emc, 0, 0, tFC_lpddr4 / src_clk_period);
+ }
+
+ if (dram_type == DRAM_TYPE_LPDDR4 || opt_dvfs_mode != MAN_SR) {
+ delay = 30;
+
+ if (cya_allow_ref_cc) {
+ delay += (1000 * fake->dram_timings[T_RP]) /
+ src_clk_period;
+ delay += 4000 * fake->dram_timings[T_RFC];
+ }
+
+ ccfifo_writel(emc, emc_pin & ~(EMC_PIN_PIN_CKE_PER_DEV |
+ EMC_PIN_PIN_CKEB |
+ EMC_PIN_PIN_CKE),
+ EMC_PIN, delay);
+ }
+
+ /* calculate reference delay multiplier */
+ value = 1;
+
+ if (ref_b4_sref_en)
+ value++;
+
+ if (cya_allow_ref_cc)
+ value++;
+
+ if (cya_issue_pc_ref)
+ value++;
+
+ if (dram_type != DRAM_TYPE_LPDDR4) {
+ delay = ((1000 * fake->dram_timings[T_RP] / src_clk_period) +
+ (1000 * fake->dram_timings[T_RFC] / src_clk_period));
+ delay = value * delay + 20;
+ } else {
+ delay = 0;
+ }
+
+ /*
+ * Step 11:
+ * Ramp down.
+ */
+ emc_dbg(emc, STEPS, "Step 11\n");
+
+ ccfifo_writel(emc, 0x0, EMC_CFG_SYNC, delay);
+
+ value = emc_dbg | EMC_DBG_WRITE_MUX_ACTIVE | EMC_DBG_WRITE_ACTIVE_ONLY;
+ ccfifo_writel(emc, value, EMC_DBG, 0);
+
+ ramp_down_wait = tegra210_emc_dvfs_power_ramp_down(emc, src_clk_period,
+ 0);
+
+ /*
+ * Step 12:
+ * And finally - trigger the clock change.
+ */
+ emc_dbg(emc, STEPS, "Step 12\n");
+
+ ccfifo_writel(emc, 1, EMC_STALL_THEN_EXE_AFTER_CLKCHANGE, 0);
+ value &= ~EMC_DBG_WRITE_ACTIVE_ONLY;
+ ccfifo_writel(emc, value, EMC_DBG, 0);
+
+ /*
+ * Step 13:
+ * Ramp up.
+ */
+ emc_dbg(emc, STEPS, "Step 13\n");
+
+ ramp_up_wait = tegra210_emc_dvfs_power_ramp_up(emc, dst_clk_period, 0);
+ ccfifo_writel(emc, emc_dbg, EMC_DBG, 0);
+
+ /*
+ * Step 14:
+ * Bringup CKE pins.
+ */
+ emc_dbg(emc, STEPS, "Step 14\n");
+
+ if (dram_type == DRAM_TYPE_LPDDR4) {
+ value = emc_pin | EMC_PIN_PIN_CKE;
+
+ if (emc->num_devices <= 1)
+ value &= ~(EMC_PIN_PIN_CKEB | EMC_PIN_PIN_CKE_PER_DEV);
+ else
+ value |= EMC_PIN_PIN_CKEB | EMC_PIN_PIN_CKE_PER_DEV;
+
+ ccfifo_writel(emc, value, EMC_PIN, 0);
+ }
+
+ /*
+ * Step 15: (two step 15s ??)
+ * Calculate zqlatch wait time; has dependency on ramping times.
+ */
+ emc_dbg(emc, STEPS, "Step 15\n");
+
+ if (dst_clk_period <= zqcal_before_cc_cutoff) {
+ s32 t = (s32)(ramp_up_wait + ramp_down_wait) /
+ (s32)dst_clk_period;
+ zq_latch_dvfs_wait_time = (s32)tZQCAL_lpddr4_fc_adj - t;
+ } else {
+ zq_latch_dvfs_wait_time = tZQCAL_lpddr4_fc_adj -
+ div_o3(1000 * next->dram_timings[T_PDEX],
+ dst_clk_period);
+ }
+
+ emc_dbg(emc, INFO, "tZQCAL_lpddr4_fc_adj = %u\n", tZQCAL_lpddr4_fc_adj);
+ emc_dbg(emc, INFO, "dst_clk_period = %u\n",
+ dst_clk_period);
+ emc_dbg(emc, INFO, "next->dram_timings[T_PDEX] = %u\n",
+ next->dram_timings[T_PDEX]);
+ emc_dbg(emc, INFO, "zq_latch_dvfs_wait_time = %d\n",
+ max_t(s32, 0, zq_latch_dvfs_wait_time));
+
+ if (dram_type == DRAM_TYPE_LPDDR4 && opt_zcal_en_cc) {
+ delay = div_o3(1000 * next->dram_timings[T_PDEX],
+ dst_clk_period);
+
+ if (emc->num_devices < 2) {
+ if (dst_clk_period > zqcal_before_cc_cutoff)
+ ccfifo_writel(emc,
+ 2UL << EMC_ZQ_CAL_DEV_SEL_SHIFT |
+ EMC_ZQ_CAL_ZQ_CAL_CMD, EMC_ZQ_CAL,
+ delay);
+
+ value = (mr13_flip_fspop & 0xfffffff7) | 0x0c000000;
+ ccfifo_writel(emc, value, EMC_MRW3, delay);
+ ccfifo_writel(emc, 0, EMC_SELF_REF, 0);
+ ccfifo_writel(emc, 0, EMC_REF, 0);
+ ccfifo_writel(emc, 2UL << EMC_ZQ_CAL_DEV_SEL_SHIFT |
+ EMC_ZQ_CAL_ZQ_LATCH_CMD,
+ EMC_ZQ_CAL,
+ max_t(s32, 0, zq_latch_dvfs_wait_time));
+ } else if (shared_zq_resistor) {
+ if (dst_clk_period > zqcal_before_cc_cutoff)
+ ccfifo_writel(emc,
+ 2UL << EMC_ZQ_CAL_DEV_SEL_SHIFT |
+ EMC_ZQ_CAL_ZQ_CAL_CMD, EMC_ZQ_CAL,
+ delay);
+
+ ccfifo_writel(emc, 2UL << EMC_ZQ_CAL_DEV_SEL_SHIFT |
+ EMC_ZQ_CAL_ZQ_LATCH_CMD, EMC_ZQ_CAL,
+ max_t(s32, 0, zq_latch_dvfs_wait_time) +
+ delay);
+ ccfifo_writel(emc, 1UL << EMC_ZQ_CAL_DEV_SEL_SHIFT |
+ EMC_ZQ_CAL_ZQ_LATCH_CMD,
+ EMC_ZQ_CAL, 0);
+
+ value = (mr13_flip_fspop & 0xfffffff7) | 0x0c000000;
+ ccfifo_writel(emc, value, EMC_MRW3, 0);
+ ccfifo_writel(emc, 0, EMC_SELF_REF, 0);
+ ccfifo_writel(emc, 0, EMC_REF, 0);
+
+ ccfifo_writel(emc, 1UL << EMC_ZQ_CAL_DEV_SEL_SHIFT |
+ EMC_ZQ_CAL_ZQ_LATCH_CMD, EMC_ZQ_CAL,
+ tZQCAL_lpddr4 / dst_clk_period);
+ } else {
+ if (dst_clk_period > zqcal_before_cc_cutoff)
+ ccfifo_writel(emc, EMC_ZQ_CAL_ZQ_CAL_CMD,
+ EMC_ZQ_CAL, delay);
+
+ value = (mr13_flip_fspop & 0xfffffff7) | 0x0c000000;
+ ccfifo_writel(emc, value, EMC_MRW3, delay);
+ ccfifo_writel(emc, 0, EMC_SELF_REF, 0);
+ ccfifo_writel(emc, 0, EMC_REF, 0);
+
+ ccfifo_writel(emc, EMC_ZQ_CAL_ZQ_LATCH_CMD, EMC_ZQ_CAL,
+ max_t(s32, 0, zq_latch_dvfs_wait_time));
+ }
+ }
+
+ /* WAR: delay for zqlatch */
+ ccfifo_writel(emc, 0, 0, 10);
+
+ /*
+ * Step 16:
+ * LPDDR4 Conditional Training Kickoff. Removed.
+ */
+
+ /*
+ * Step 17:
+ * MANSR exit self refresh.
+ */
+ emc_dbg(emc, STEPS, "Step 17\n");
+
+ if (opt_dvfs_mode == MAN_SR && dram_type != DRAM_TYPE_LPDDR4)
+ ccfifo_writel(emc, 0, EMC_SELF_REF, 0);
+
+ /*
+ * Step 18:
+ * Send MRWs to LPDDR3/DDR3.
+ */
+ emc_dbg(emc, STEPS, "Step 18\n");
+
+ if (dram_type == DRAM_TYPE_LPDDR2) {
+ ccfifo_writel(emc, next->emc_mrw2, EMC_MRW2, 0);
+ ccfifo_writel(emc, next->emc_mrw, EMC_MRW, 0);
+ if (is_lpddr3)
+ ccfifo_writel(emc, next->emc_mrw4, EMC_MRW4, 0);
+ } else if (dram_type == DRAM_TYPE_DDR3) {
+ if (opt_dll_mode)
+ ccfifo_writel(emc, next->emc_emrs &
+ ~EMC_EMRS_USE_EMRS_LONG_CNT, EMC_EMRS, 0);
+ ccfifo_writel(emc, next->emc_emrs2 &
+ ~EMC_EMRS2_USE_EMRS2_LONG_CNT, EMC_EMRS2, 0);
+ ccfifo_writel(emc, next->emc_mrs |
+ EMC_EMRS_USE_EMRS_LONG_CNT, EMC_MRS, 0);
+ }
+
+ /*
+ * Step 19:
+ * ZQCAL for LPDDR3/DDR3
+ */
+ emc_dbg(emc, STEPS, "Step 19\n");
+
+ if (opt_zcal_en_cc) {
+ if (dram_type == DRAM_TYPE_LPDDR2) {
+ value = opt_cc_short_zcal ? 90000 : 360000;
+ value = div_o3(value, dst_clk_period);
+ value = value <<
+ EMC_MRS_WAIT_CNT2_MRS_EXT2_WAIT_CNT_SHIFT |
+ value <<
+ EMC_MRS_WAIT_CNT2_MRS_EXT1_WAIT_CNT_SHIFT;
+ ccfifo_writel(emc, value, EMC_MRS_WAIT_CNT2, 0);
+
+ value = opt_cc_short_zcal ? 0x56 : 0xab;
+ ccfifo_writel(emc, 2 << EMC_MRW_MRW_DEV_SELECTN_SHIFT |
+ EMC_MRW_USE_MRW_EXT_CNT |
+ 10 << EMC_MRW_MRW_MA_SHIFT |
+ value << EMC_MRW_MRW_OP_SHIFT,
+ EMC_MRW, 0);
+
+ if (emc->num_devices > 1) {
+ value = 1 << EMC_MRW_MRW_DEV_SELECTN_SHIFT |
+ EMC_MRW_USE_MRW_EXT_CNT |
+ 10 << EMC_MRW_MRW_MA_SHIFT |
+ value << EMC_MRW_MRW_OP_SHIFT;
+ ccfifo_writel(emc, value, EMC_MRW, 0);
+ }
+ } else if (dram_type == DRAM_TYPE_DDR3) {
+ value = opt_cc_short_zcal ? 0 : EMC_ZQ_CAL_LONG;
+
+ ccfifo_writel(emc, value |
+ 2 << EMC_ZQ_CAL_DEV_SEL_SHIFT |
+ EMC_ZQ_CAL_ZQ_CAL_CMD, EMC_ZQ_CAL,
+ 0);
+
+ if (emc->num_devices > 1) {
+ value = value | 1 << EMC_ZQ_CAL_DEV_SEL_SHIFT |
+ EMC_ZQ_CAL_ZQ_CAL_CMD;
+ ccfifo_writel(emc, value, EMC_ZQ_CAL, 0);
+ }
+ }
+ }
+
+ if (bg_reg_mode_change) {
+ tegra210_emc_set_shadow_bypass(emc, ACTIVE);
+
+ if (ramp_up_wait <= 1250000)
+ delay = (1250000 - ramp_up_wait) / dst_clk_period;
+ else
+ delay = 0;
+
+ ccfifo_writel(emc,
+ next->burst_regs[EMC_PMACRO_BG_BIAS_CTRL_0_INDEX],
+ EMC_PMACRO_BG_BIAS_CTRL_0, delay);
+ tegra210_emc_set_shadow_bypass(emc, ASSEMBLY);
+ }
+
+ /*
+ * Step 20:
+ * Issue ref and optional QRST.
+ */
+ emc_dbg(emc, STEPS, "Step 20\n");
+
+ if (dram_type != DRAM_TYPE_LPDDR4)
+ ccfifo_writel(emc, 0, EMC_REF, 0);
+
+ if (opt_do_sw_qrst) {
+ ccfifo_writel(emc, 1, EMC_ISSUE_QRST, 0);
+ ccfifo_writel(emc, 0, EMC_ISSUE_QRST, 2);
+ }
+
+ /*
+ * Step 21:
+ * Restore ZCAL and ZCAL interval.
+ */
+ emc_dbg(emc, STEPS, "Step 21\n");
+
+ if (save_restore_clkstop_pd || opt_zcal_en_cc) {
+ ccfifo_writel(emc, emc_dbg | EMC_DBG_WRITE_MUX_ACTIVE,
+ EMC_DBG, 0);
+ if (opt_zcal_en_cc && dram_type != DRAM_TYPE_LPDDR4)
+ ccfifo_writel(emc, next->burst_regs[EMC_ZCAL_INTERVAL_INDEX],
+ EMC_ZCAL_INTERVAL, 0);
+
+ if (save_restore_clkstop_pd)
+ ccfifo_writel(emc, next->burst_regs[EMC_CFG_INDEX] &
+ ~EMC_CFG_DYN_SELF_REF,
+ EMC_CFG, 0);
+ ccfifo_writel(emc, emc_dbg, EMC_DBG, 0);
+ }
+
+ /*
+ * Step 22:
+ * Restore EMC_CFG_PIPE_CLK.
+ */
+ emc_dbg(emc, STEPS, "Step 22\n");
+
+ ccfifo_writel(emc, emc_cfg_pipe_clk, EMC_CFG_PIPE_CLK, 0);
+
+ if (bg_reg_mode_change) {
+ if (enable_bg_reg)
+ emc_writel(emc,
+ next->burst_regs[EMC_PMACRO_BG_BIAS_CTRL_0_INDEX] &
+ ~EMC_PMACRO_BG_BIAS_CTRL_0_BGLP_E_PWRD,
+ EMC_PMACRO_BG_BIAS_CTRL_0);
+ else
+ emc_writel(emc,
+ next->burst_regs[EMC_PMACRO_BG_BIAS_CTRL_0_INDEX] &
+ ~EMC_PMACRO_BG_BIAS_CTRL_0_BG_E_PWRD,
+ EMC_PMACRO_BG_BIAS_CTRL_0);
+ }
+
+ /*
+ * Step 23:
+ */
+ emc_dbg(emc, STEPS, "Step 23\n");
+
+ value = emc_readl(emc, EMC_CFG_DIG_DLL);
+ value |= EMC_CFG_DIG_DLL_CFG_DLL_STALL_ALL_TRAFFIC;
+ value &= ~EMC_CFG_DIG_DLL_CFG_DLL_STALL_RW_UNTIL_LOCK;
+ value &= ~EMC_CFG_DIG_DLL_CFG_DLL_STALL_ALL_UNTIL_LOCK;
+ value &= ~EMC_CFG_DIG_DLL_CFG_DLL_EN;
+ value = (value & ~EMC_CFG_DIG_DLL_CFG_DLL_MODE_MASK) |
+ (2 << EMC_CFG_DIG_DLL_CFG_DLL_MODE_SHIFT);
+ emc_writel(emc, value, EMC_CFG_DIG_DLL);
+
+ tegra210_emc_do_clock_change(emc, clksrc);
+
+ /*
+ * Step 24:
+ * Save training results. Removed.
+ */
+
+ /*
+ * Step 25:
+ * Program MC updown registers.
+ */
+ emc_dbg(emc, STEPS, "Step 25\n");
+
+ if (next->rate > last->rate) {
+ for (i = 0; i < next->num_up_down; i++)
+ mc_writel(emc->mc, next->la_scale_regs[i],
+ emc->offsets->la_scale[i]);
+
+ tegra210_emc_timing_update(emc);
+ }
+
+ /*
+ * Step 26:
+ * Restore ZCAL registers.
+ */
+ emc_dbg(emc, STEPS, "Step 26\n");
+
+ if (dram_type == DRAM_TYPE_LPDDR4) {
+ tegra210_emc_set_shadow_bypass(emc, ACTIVE);
+ emc_writel(emc, next->burst_regs[EMC_ZCAL_WAIT_CNT_INDEX],
+ EMC_ZCAL_WAIT_CNT);
+ emc_writel(emc, next->burst_regs[EMC_ZCAL_INTERVAL_INDEX],
+ EMC_ZCAL_INTERVAL);
+ tegra210_emc_set_shadow_bypass(emc, ASSEMBLY);
+ }
+
+ if (dram_type != DRAM_TYPE_LPDDR4 && opt_zcal_en_cc &&
+ !opt_short_zcal && opt_cc_short_zcal) {
+ udelay(2);
+
+ tegra210_emc_set_shadow_bypass(emc, ACTIVE);
+ if (dram_type == DRAM_TYPE_LPDDR2)
+ emc_writel(emc, next->burst_regs[EMC_MRS_WAIT_CNT_INDEX],
+ EMC_MRS_WAIT_CNT);
+ else if (dram_type == DRAM_TYPE_DDR3)
+ emc_writel(emc, next->burst_regs[EMC_ZCAL_WAIT_CNT_INDEX],
+ EMC_ZCAL_WAIT_CNT);
+ tegra210_emc_set_shadow_bypass(emc, ASSEMBLY);
+ }
+
+ /*
+ * Step 27:
+ * Restore EMC_CFG, FDPD registers.
+ */
+ emc_dbg(emc, STEPS, "Step 27\n");
+
+ tegra210_emc_set_shadow_bypass(emc, ACTIVE);
+ emc_writel(emc, next->burst_regs[EMC_CFG_INDEX], EMC_CFG);
+ tegra210_emc_set_shadow_bypass(emc, ASSEMBLY);
+ emc_writel(emc, next->emc_fdpd_ctrl_cmd_no_ramp,
+ EMC_FDPD_CTRL_CMD_NO_RAMP);
+ emc_writel(emc, next->emc_sel_dpd_ctrl, EMC_SEL_DPD_CTRL);
+
+ /*
+ * Step 28:
+ * Training recover. Removed.
+ */
+ emc_dbg(emc, STEPS, "Step 28\n");
+
+ tegra210_emc_set_shadow_bypass(emc, ACTIVE);
+ emc_writel(emc,
+ next->burst_regs[EMC_PMACRO_AUTOCAL_CFG_COMMON_INDEX],
+ EMC_PMACRO_AUTOCAL_CFG_COMMON);
+ tegra210_emc_set_shadow_bypass(emc, ASSEMBLY);
+
+ /*
+ * Step 29:
+ * Power fix WAR.
+ */
+ emc_dbg(emc, STEPS, "Step 29\n");
+
+ emc_writel(emc, EMC_PMACRO_CFG_PM_GLOBAL_0_DISABLE_CFG_BYTE0 |
+ EMC_PMACRO_CFG_PM_GLOBAL_0_DISABLE_CFG_BYTE1 |
+ EMC_PMACRO_CFG_PM_GLOBAL_0_DISABLE_CFG_BYTE2 |
+ EMC_PMACRO_CFG_PM_GLOBAL_0_DISABLE_CFG_BYTE3 |
+ EMC_PMACRO_CFG_PM_GLOBAL_0_DISABLE_CFG_BYTE4 |
+ EMC_PMACRO_CFG_PM_GLOBAL_0_DISABLE_CFG_BYTE5 |
+ EMC_PMACRO_CFG_PM_GLOBAL_0_DISABLE_CFG_BYTE6 |
+ EMC_PMACRO_CFG_PM_GLOBAL_0_DISABLE_CFG_BYTE7,
+ EMC_PMACRO_CFG_PM_GLOBAL_0);
+ emc_writel(emc, EMC_PMACRO_TRAINING_CTRL_0_CH0_TRAINING_E_WRPTR,
+ EMC_PMACRO_TRAINING_CTRL_0);
+ emc_writel(emc, EMC_PMACRO_TRAINING_CTRL_1_CH1_TRAINING_E_WRPTR,
+ EMC_PMACRO_TRAINING_CTRL_1);
+ emc_writel(emc, 0, EMC_PMACRO_CFG_PM_GLOBAL_0);
+
+ /*
+ * Step 30:
+ * Re-enable autocal.
+ */
+ emc_dbg(emc, STEPS, "Step 30: Re-enable DLL and AUTOCAL\n");
+
+ if (next->burst_regs[EMC_CFG_DIG_DLL_INDEX] & EMC_CFG_DIG_DLL_CFG_DLL_EN) {
+ value = emc_readl(emc, EMC_CFG_DIG_DLL);
+ value |= EMC_CFG_DIG_DLL_CFG_DLL_STALL_ALL_TRAFFIC;
+ value |= EMC_CFG_DIG_DLL_CFG_DLL_EN;
+ value &= ~EMC_CFG_DIG_DLL_CFG_DLL_STALL_RW_UNTIL_LOCK;
+ value &= ~EMC_CFG_DIG_DLL_CFG_DLL_STALL_ALL_UNTIL_LOCK;
+ value = (value & ~EMC_CFG_DIG_DLL_CFG_DLL_MODE_MASK) |
+ (2 << EMC_CFG_DIG_DLL_CFG_DLL_MODE_SHIFT);
+ emc_writel(emc, value, EMC_CFG_DIG_DLL);
+ tegra210_emc_timing_update(emc);
+ }
+
+ emc_writel(emc, next->emc_auto_cal_config, EMC_AUTO_CAL_CONFIG);
+
+ /* Done! Yay. */
+}
+
+const struct tegra210_emc_sequence tegra210_emc_r21021 = {
+ .revision = 0x7,
+ .set_clock = tegra210_emc_r21021_set_clock,
+ .periodic_compensation = tegra210_emc_r21021_periodic_compensation,
+};