summaryrefslogtreecommitdiff
path: root/drivers/ram/rockchip
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ram/rockchip')
-rw-r--r--drivers/ram/rockchip/Makefile7
-rw-r--r--drivers/ram/rockchip/dmc-rk3368.c1007
2 files changed, 1014 insertions, 0 deletions
diff --git a/drivers/ram/rockchip/Makefile b/drivers/ram/rockchip/Makefile
new file mode 100644
index 0000000000..b09d03c2c9
--- /dev/null
+++ b/drivers/ram/rockchip/Makefile
@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2017 Theobroma Systems Design und Consulting GmbH
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-$(CONFIG_ROCKCHIP_RK3368) = dmc-rk3368.o
diff --git a/drivers/ram/rockchip/dmc-rk3368.c b/drivers/ram/rockchip/dmc-rk3368.c
new file mode 100644
index 0000000000..ca7b1ff0c8
--- /dev/null
+++ b/drivers/ram/rockchip/dmc-rk3368.c
@@ -0,0 +1,1007 @@
+/*
+ * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <dm.h>
+#include <dt-bindings/memory/rk3368-dmc.h>
+#include <dt-structs.h>
+#include <ram.h>
+#include <regmap.h>
+#include <syscon.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/cru_rk3368.h>
+#include <asm/arch/grf_rk3368.h>
+#include <asm/arch/ddr_rk3368.h>
+#include <asm/arch/sdram.h>
+#include <asm/arch/sdram_common.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct dram_info {
+ struct ram_info info;
+ struct clk ddr_clk;
+ struct rk3368_cru *cru;
+ struct rk3368_grf *grf;
+ struct rk3368_ddr_pctl *pctl;
+ struct rk3368_ddrphy *phy;
+ struct rk3368_pmu_grf *pmugrf;
+ struct rk3368_msch *msch;
+};
+
+struct rk3368_sdram_params {
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+ struct dtd_rockchip_rk3368_dmc of_plat;
+#endif
+ struct rk3288_sdram_pctl_timing pctl_timing;
+ u32 trefi_mem_ddr3;
+ struct rk3288_sdram_channel chan;
+ struct regmap *map;
+ u32 ddr_freq;
+ u32 memory_schedule;
+ u32 ddr_speed_bin;
+ u32 tfaw_mult;
+};
+
+/* PTCL bits */
+enum {
+ /* PCTL_DFISTCFG0 */
+ DFI_INIT_START = BIT(0),
+ DFI_DATA_BYTE_DISABLE_EN = BIT(2),
+
+ /* PCTL_DFISTCFG1 */
+ DFI_DRAM_CLK_SR_EN = BIT(0),
+ DFI_DRAM_CLK_DPD_EN = BIT(1),
+ ODT_LEN_BL8_W_SHIFT = 16,
+
+ /* PCTL_DFISTCFG2 */
+ DFI_PARITY_INTR_EN = BIT(0),
+ DFI_PARITY_EN = BIT(1),
+
+ /* PCTL_DFILPCFG0 */
+ TLP_RESP_TIME_SHIFT = 16,
+ LP_SR_EN = BIT(8),
+ LP_PD_EN = BIT(0),
+
+ /* PCTL_DFIODTCFG */
+ RANK0_ODT_WRITE_SEL = BIT(3),
+ RANK1_ODT_WRITE_SEL = BIT(11),
+
+ /* PCTL_SCFG */
+ HW_LOW_POWER_EN = BIT(0),
+
+ /* PCTL_MCMD */
+ START_CMD = BIT(31),
+ MCMD_RANK0 = BIT(20),
+ MCMD_RANK1 = BIT(21),
+ DESELECT_CMD = 0,
+ PREA_CMD,
+ REF_CMD,
+ MRS_CMD,
+ ZQCS_CMD,
+ ZQCL_CMD,
+ RSTL_CMD,
+ MRR_CMD = 8,
+ DPDE_CMD,
+
+ /* PCTL_POWCTL */
+ POWER_UP_START = BIT(0),
+
+ /* PCTL_POWSTAT */
+ POWER_UP_DONE = BIT(0),
+
+ /* PCTL_SCTL */
+ INIT_STATE = 0,
+ CFG_STATE,
+ GO_STATE,
+ SLEEP_STATE,
+ WAKEUP_STATE,
+
+ /* PCTL_STAT */
+ LP_TRIG_SHIFT = 4,
+ LP_TRIG_MASK = 7,
+ PCTL_STAT_MSK = 7,
+ INIT_MEM = 0,
+ CONFIG,
+ CONFIG_REQ,
+ ACCESS,
+ ACCESS_REQ,
+ LOW_POWER,
+ LOW_POWER_ENTRY_REQ,
+ LOW_POWER_EXIT_REQ,
+
+ /* PCTL_MCFG */
+ DDR2_DDR3_BL_8 = BIT(0),
+ DDR3_EN = BIT(5),
+ TFAW_TRRD_MULT4 = (0 << 18),
+ TFAW_TRRD_MULT5 = (1 << 18),
+ TFAW_TRRD_MULT6 = (2 << 18),
+};
+
+#define DDR3_MR0_WR(n) \
+ ((n <= 8) ? ((n - 4) << 9) : (((n >> 1) & 0x7) << 9))
+#define DDR3_MR0_CL(n) \
+ ((((n - 4) & 0x7) << 4) | (((n - 4) & 0x8) >> 2))
+#define DDR3_MR0_BL8 \
+ (0 << 0)
+#define DDR3_MR0_DLL_RESET \
+ (1 << 8)
+#define DDR3_MR1_RTT120OHM \
+ ((0 << 9) | (1 << 6) | (0 << 2))
+#define DDR3_MR2_TWL(n) \
+ (((n - 5) & 0x7) << 3)
+
+
+#ifdef CONFIG_TPL_BUILD
+
+static void ddr_set_noc_spr_err_stall(struct rk3368_grf *grf, bool enable)
+{
+ if (enable)
+ rk_setreg(&grf->ddrc0_con0, NOC_RSP_ERR_STALL);
+ else
+ rk_clrreg(&grf->ddrc0_con0, NOC_RSP_ERR_STALL);
+}
+
+static void ddr_set_ddr3_mode(struct rk3368_grf *grf, bool ddr3_mode)
+{
+ if (ddr3_mode)
+ rk_setreg(&grf->ddrc0_con0, MSCH0_MAINDDR3_DDR3);
+ else
+ rk_clrreg(&grf->ddrc0_con0, MSCH0_MAINDDR3_DDR3);
+}
+
+static void ddrphy_config(struct rk3368_ddrphy *phy,
+ u32 tcl, u32 tal, u32 tcwl)
+{
+ int i;
+
+ /* Set to DDR3 mode */
+ clrsetbits_le32(&phy->reg[1], 0x3, 0x0);
+
+ /* DDRPHY_REGB: CL, AL */
+ clrsetbits_le32(&phy->reg[0xb], 0xff, tcl << 4 | tal);
+ /* DDRPHY_REGC: CWL */
+ clrsetbits_le32(&phy->reg[0xc], 0x0f, tcwl);
+
+ /* Update drive-strength */
+ writel(0xcc, &phy->reg[0x11]);
+ writel(0xaa, &phy->reg[0x16]);
+ /*
+ * Update NRCOMP/PRCOMP for all 4 channels (for details of all
+ * affected registers refer to the documentation of DDRPHY_REG20
+ * and DDRPHY_REG21 in the RK3368 TRM.
+ */
+ for (i = 0; i < 4; ++i) {
+ writel(0xcc, &phy->reg[0x20 + i * 0x10]);
+ writel(0x44, &phy->reg[0x21 + i * 0x10]);
+ }
+
+ /* Enable write-leveling calibration bypass */
+ setbits_le32(&phy->reg[2], BIT(3));
+}
+
+static void copy_to_reg(u32 *dest, const u32 *src, u32 n)
+{
+ int i;
+
+ for (i = 0; i < n / sizeof(u32); i++)
+ writel(*src++, dest++);
+}
+
+static void send_command(struct rk3368_ddr_pctl *pctl, u32 rank, u32 cmd)
+{
+ u32 mcmd = START_CMD | cmd | rank;
+
+ debug("%s: writing %x to MCMD\n", __func__, mcmd);
+ writel(mcmd, &pctl->mcmd);
+ while (readl(&pctl->mcmd) & START_CMD)
+ /* spin */;
+}
+
+static void send_mrs(struct rk3368_ddr_pctl *pctl,
+ u32 rank, u32 mr_num, u32 mr_data)
+{
+ u32 mcmd = START_CMD | MRS_CMD | rank | (mr_num << 17) | (mr_data << 4);
+
+ debug("%s: writing %x to MCMD\n", __func__, mcmd);
+ writel(mcmd, &pctl->mcmd);
+ while (readl(&pctl->mcmd) & START_CMD)
+ /* spin */;
+}
+
+static int memory_init(struct rk3368_ddr_pctl *pctl,
+ struct rk3368_sdram_params *params)
+{
+ u32 mr[4];
+ const ulong timeout_ms = 500;
+ ulong tmp;
+
+ /*
+ * Power up DRAM by DDR_PCTL_POWCTL[0] register of PCTL and
+ * wait power up DRAM finish with DDR_PCTL_POWSTAT[0] register
+ * of PCTL.
+ */
+ writel(POWER_UP_START, &pctl->powctl);
+
+ tmp = get_timer(0);
+ do {
+ if (get_timer(tmp) > timeout_ms) {
+ error("%s: POWER_UP_START did not complete in %ld ms\n",
+ __func__, timeout_ms);
+ return -ETIME;
+ }
+ } while (!(readl(&pctl->powstat) & POWER_UP_DONE));
+
+ /* Configure MR0 through MR3 */
+ mr[0] = DDR3_MR0_WR(params->pctl_timing.twr) |
+ DDR3_MR0_CL(params->pctl_timing.tcl) |
+ DDR3_MR0_DLL_RESET;
+ mr[1] = DDR3_MR1_RTT120OHM;
+ mr[2] = DDR3_MR2_TWL(params->pctl_timing.tcwl);
+ mr[3] = 0;
+
+ /*
+ * Also see RK3368 Technical Reference Manual:
+ * "16.6.2 Initialization (DDR3 Initialization Sequence)"
+ */
+ send_command(pctl, MCMD_RANK0 | MCMD_RANK1, DESELECT_CMD);
+ udelay(1);
+ send_command(pctl, MCMD_RANK0 | MCMD_RANK1, PREA_CMD);
+ send_mrs(pctl, MCMD_RANK0 | MCMD_RANK1, 2, mr[2]);
+ send_mrs(pctl, MCMD_RANK0 | MCMD_RANK1, 3, mr[3]);
+ send_mrs(pctl, MCMD_RANK0 | MCMD_RANK1, 1, mr[1]);
+ send_mrs(pctl, MCMD_RANK0 | MCMD_RANK1, 0, mr[0]);
+ send_command(pctl, MCMD_RANK0 | MCMD_RANK1, ZQCL_CMD);
+
+ return 0;
+}
+
+static void move_to_config_state(struct rk3368_ddr_pctl *pctl)
+{
+ /*
+ * Also see RK3368 Technical Reference Manual:
+ * "16.6.1 State transition of PCTL (Moving to Config State)"
+ */
+ u32 state = readl(&pctl->stat) & PCTL_STAT_MSK;
+
+ switch (state) {
+ case LOW_POWER:
+ writel(WAKEUP_STATE, &pctl->sctl);
+ while ((readl(&pctl->stat) & PCTL_STAT_MSK) != ACCESS)
+ /* spin */;
+
+ /* fall-through */
+ case ACCESS:
+ case INIT_MEM:
+ writel(CFG_STATE, &pctl->sctl);
+ while ((readl(&pctl->stat) & PCTL_STAT_MSK) != CONFIG)
+ /* spin */;
+ break;
+
+ case CONFIG:
+ return;
+
+ default:
+ break;
+ }
+}
+
+static void move_to_access_state(struct rk3368_ddr_pctl *pctl)
+{
+ /*
+ * Also see RK3368 Technical Reference Manual:
+ * "16.6.1 State transition of PCTL (Moving to Access State)"
+ */
+ u32 state = readl(&pctl->stat) & PCTL_STAT_MSK;
+
+ switch (state) {
+ case LOW_POWER:
+ if (((readl(&pctl->stat) >> LP_TRIG_SHIFT) &
+ LP_TRIG_MASK) == 1)
+ return;
+
+ writel(WAKEUP_STATE, &pctl->sctl);
+ while ((readl(&pctl->stat) & PCTL_STAT_MSK) != ACCESS)
+ /* spin */;
+
+ /* fall-through */
+ case INIT_MEM:
+ writel(CFG_STATE, &pctl->sctl);
+ while ((readl(&pctl->stat) & PCTL_STAT_MSK) != CONFIG)
+ /* spin */;
+
+ /* fall-through */
+ case CONFIG:
+ writel(GO_STATE, &pctl->sctl);
+ while ((readl(&pctl->stat) & PCTL_STAT_MSK) == CONFIG)
+ /* spin */;
+ break;
+
+ case ACCESS:
+ return;
+
+ default:
+ break;
+ }
+}
+
+static void ddrctl_reset(struct rk3368_cru *cru)
+{
+ const u32 ctl_reset = BIT(3) | BIT(2);
+ const u32 phy_reset = BIT(1) | BIT(0);
+
+ /*
+ * The PHY reset should be released before the PCTL reset.
+ *
+ * Note that the following sequence (including the number of
+ * us to delay between releasing the PHY and PCTL reset) has
+ * been adapted per feedback received from Rockchips, so do
+ * not try to optimise.
+ */
+ rk_setreg(&cru->softrst_con[10], ctl_reset | phy_reset);
+ udelay(1);
+ rk_clrreg(&cru->softrst_con[10], phy_reset);
+ udelay(5);
+ rk_clrreg(&cru->softrst_con[10], ctl_reset);
+}
+
+static void ddrphy_reset(struct rk3368_ddrphy *ddrphy)
+{
+ /*
+ * The analog part of the PHY should be release at least 1000
+ * DRAM cycles before the digital part of the PHY (waiting for
+ * 5us will ensure this for a DRAM clock as low as 200MHz).
+ */
+ clrbits_le32(&ddrphy->reg[0], BIT(3) | BIT(2));
+ udelay(1);
+ setbits_le32(&ddrphy->reg[0], BIT(2));
+ udelay(5);
+ setbits_le32(&ddrphy->reg[0], BIT(3));
+}
+
+static void ddrphy_config_delays(struct rk3368_ddrphy *ddrphy, u32 freq)
+{
+ u32 dqs_dll_delay;
+
+ setbits_le32(&ddrphy->reg[0x13], BIT(4));
+ clrbits_le32(&ddrphy->reg[0x14], BIT(3));
+
+ setbits_le32(&ddrphy->reg[0x26], BIT(4));
+ clrbits_le32(&ddrphy->reg[0x27], BIT(3));
+
+ setbits_le32(&ddrphy->reg[0x36], BIT(4));
+ clrbits_le32(&ddrphy->reg[0x37], BIT(3));
+
+ setbits_le32(&ddrphy->reg[0x46], BIT(4));
+ clrbits_le32(&ddrphy->reg[0x47], BIT(3));
+
+ setbits_le32(&ddrphy->reg[0x56], BIT(4));
+ clrbits_le32(&ddrphy->reg[0x57], BIT(3));
+
+ if (freq <= 400000000)
+ setbits_le32(&ddrphy->reg[0xa4], 0x1f);
+ else
+ clrbits_le32(&ddrphy->reg[0xa4], 0x1f);
+
+ if (freq < 681000000)
+ dqs_dll_delay = 3; /* 67.5 degree delay */
+ else
+ dqs_dll_delay = 2; /* 45 degree delay */
+
+ writel(dqs_dll_delay, &ddrphy->reg[0x28]);
+ writel(dqs_dll_delay, &ddrphy->reg[0x38]);
+ writel(dqs_dll_delay, &ddrphy->reg[0x48]);
+ writel(dqs_dll_delay, &ddrphy->reg[0x58]);
+}
+
+static int dfi_cfg(struct rk3368_ddr_pctl *pctl)
+{
+ const ulong timeout_ms = 200;
+ ulong tmp;
+
+ writel(DFI_DATA_BYTE_DISABLE_EN, &pctl->dfistcfg0);
+
+ writel(DFI_DRAM_CLK_SR_EN | DFI_DRAM_CLK_DPD_EN,
+ &pctl->dfistcfg1);
+ writel(DFI_PARITY_INTR_EN | DFI_PARITY_EN, &pctl->dfistcfg2);
+ writel(7 << TLP_RESP_TIME_SHIFT | LP_SR_EN | LP_PD_EN,
+ &pctl->dfilpcfg0);
+
+ writel(1, &pctl->dfitphyupdtype0);
+
+ writel(0x1f, &pctl->dfitphyrdlat);
+ writel(0, &pctl->dfitphywrdata);
+ writel(0, &pctl->dfiupdcfg); /* phyupd and ctrlupd disabled */
+
+ setbits_le32(&pctl->dfistcfg0, DFI_INIT_START);
+
+ tmp = get_timer(0);
+ do {
+ if (get_timer(tmp) > timeout_ms) {
+ error("%s: DFI init did not complete within %ld ms\n",
+ __func__, timeout_ms);
+ return -ETIME;
+ }
+ } while ((readl(&pctl->dfiststat0) & 1) == 0);
+
+ return 0;
+}
+
+static inline u32 ps_to_tCK(const u32 ps, const ulong freq)
+{
+ const ulong MHz = 1000000;
+ return DIV_ROUND_UP(ps * freq, 1000000 * MHz);
+}
+
+static inline u32 ns_to_tCK(const u32 ns, const ulong freq)
+{
+ return ps_to_tCK(ns * 1000, freq);
+}
+
+static inline u32 tCK_to_ps(const ulong tCK, const ulong freq)
+{
+ const ulong MHz = 1000000;
+ return DIV_ROUND_UP(tCK * 1000000 * MHz, freq);
+}
+
+static int pctl_calc_timings(struct rk3368_sdram_params *params,
+ ulong freq)
+{
+ struct rk3288_sdram_pctl_timing *pctl_timing = &params->pctl_timing;
+ const ulong MHz = 1000000;
+ u32 tccd;
+ u32 tfaw_as_ps;
+
+ if (params->ddr_speed_bin != DDR3_1600K) {
+ error("%s: unimplemented DDR3 speed bin %d\n",
+ __func__, params->ddr_speed_bin);
+ return -1;
+ }
+
+ /* PCTL is clocked at 1/2 the DRAM clock; err on the side of caution */
+ pctl_timing->togcnt1u = DIV_ROUND_UP(freq, 2 * MHz);
+ pctl_timing->togcnt100n = DIV_ROUND_UP(freq / 10, 2 * MHz);
+
+ pctl_timing->tinit = 200; /* 200 usec */
+ pctl_timing->trsth = 500; /* 500 usec */
+ pctl_timing->trefi = 78; /* 7.8usec = 78 * 100ns */
+ params->trefi_mem_ddr3 = ns_to_tCK(pctl_timing->trefi * 100, freq);
+
+ if (freq <= (400 * MHz)) {
+ pctl_timing->tcl = 6;
+ pctl_timing->tcwl = 10;
+ } else if (freq <= (533 * MHz)) {
+ pctl_timing->tcl = 8;
+ pctl_timing->tcwl = 6;
+ } else if (freq <= (666 * MHz)) {
+ pctl_timing->tcl = 10;
+ pctl_timing->tcwl = 7;
+ } else {
+ pctl_timing->tcl = 11;
+ pctl_timing->tcwl = 8;
+ }
+
+ pctl_timing->tmrd = 4; /* 4 tCK (all speed bins) */
+ pctl_timing->trfc = ns_to_tCK(350, freq); /* tRFC: 350 (max) @ 8GBit */
+ pctl_timing->trp = max(4u, ps_to_tCK(13750, freq));
+ /*
+ * JESD-79:
+ * READ to WRITE Command Delay = RL + tCCD / 2 + 2tCK - WL
+ */
+ tccd = 4;
+ pctl_timing->trtw = pctl_timing->tcl + tccd/2 + 2 - pctl_timing->tcwl;
+ pctl_timing->tal = 0;
+ pctl_timing->tras = ps_to_tCK(35000, freq);
+ pctl_timing->trc = ps_to_tCK(48750, freq);
+ pctl_timing->trcd = ps_to_tCK(13750, freq);
+ pctl_timing->trrd = max(4u, ps_to_tCK(7500, freq));
+ pctl_timing->trtp = max(4u, ps_to_tCK(7500, freq));
+ pctl_timing->twr = ps_to_tCK(15000, freq);
+ /* The DDR3 mode-register does only support even values for tWR > 8. */
+ if (pctl_timing->twr > 8)
+ pctl_timing->twr = (pctl_timing->twr + 1) & ~1;
+ pctl_timing->twtr = max(4u, ps_to_tCK(7500, freq));
+ pctl_timing->texsr = 512; /* tEXSR(max) is tDLLLK */
+ pctl_timing->txp = max(3u, ps_to_tCK(6000, freq));
+ pctl_timing->txpdll = max(10u, ps_to_tCK(24000, freq));
+ pctl_timing->tzqcs = max(64u, ps_to_tCK(80000, freq));
+ pctl_timing->tzqcsi = 10000; /* as used by Rockchip */
+ pctl_timing->tdqs = 1; /* fixed for DDR3 */
+ pctl_timing->tcksre = max(5u, ps_to_tCK(10000, freq));
+ pctl_timing->tcksrx = max(5u, ps_to_tCK(10000, freq));
+ pctl_timing->tcke = max(3u, ps_to_tCK(5000, freq));
+ pctl_timing->tmod = max(12u, ps_to_tCK(15000, freq));
+ pctl_timing->trstl = ns_to_tCK(100, freq);
+ pctl_timing->tzqcl = max(256u, ps_to_tCK(320000, freq)); /* tZQoper */
+ pctl_timing->tmrr = 0;
+ pctl_timing->tckesr = pctl_timing->tcke + 1; /* JESD-79: tCKE + 1tCK */
+ pctl_timing->tdpd = 0; /* RK3368 TRM: "allowed values for DDR3: 0" */
+
+
+ /*
+ * The controller can represent tFAW as 4x, 5x or 6x tRRD only.
+ * We want to use the smallest multiplier that satisfies the tFAW
+ * requirements of the given speed-bin. If necessary, we stretch out
+ * tRRD to allow us to operate on a 6x multiplier for tFAW.
+ */
+ tfaw_as_ps = 40000; /* 40ns: tFAW for DDR3-1600K, 2KB page-size */
+ if (tCK_to_ps(pctl_timing->trrd * 6, freq) < tfaw_as_ps) {
+ /* If tFAW is > 6 x tRRD, we need to stretch tRRD */
+ pctl_timing->trrd = ps_to_tCK(DIV_ROUND_UP(40000, 6), freq);
+ params->tfaw_mult = TFAW_TRRD_MULT6;
+ } else if (tCK_to_ps(pctl_timing->trrd * 5, freq) < tfaw_as_ps) {
+ params->tfaw_mult = TFAW_TRRD_MULT6;
+ } else if (tCK_to_ps(pctl_timing->trrd * 4, freq) < tfaw_as_ps) {
+ params->tfaw_mult = TFAW_TRRD_MULT5;
+ } else {
+ params->tfaw_mult = TFAW_TRRD_MULT4;
+ }
+
+ return 0;
+}
+
+static void pctl_cfg(struct rk3368_ddr_pctl *pctl,
+ struct rk3368_sdram_params *params,
+ struct rk3368_grf *grf)
+{
+ /* Configure PCTL timing registers */
+ params->pctl_timing.trefi |= BIT(31); /* see PCTL_TREFI */
+ copy_to_reg(&pctl->togcnt1u, &params->pctl_timing.togcnt1u,
+ sizeof(params->pctl_timing));
+ writel(params->trefi_mem_ddr3, &pctl->trefi_mem_ddr3);
+
+ /* Set up ODT write selector and ODT write length */
+ writel((RANK0_ODT_WRITE_SEL | RANK1_ODT_WRITE_SEL), &pctl->dfiodtcfg);
+ writel(7 << ODT_LEN_BL8_W_SHIFT, &pctl->dfiodtcfg1);
+
+ /* Set up the CL/CWL-dependent timings of DFI */
+ writel((params->pctl_timing.tcl - 1) / 2 - 1, &pctl->dfitrddataen);
+ writel((params->pctl_timing.tcwl - 1) / 2 - 1, &pctl->dfitphywrlat);
+
+ /* DDR3 */
+ writel(params->tfaw_mult | DDR3_EN | DDR2_DDR3_BL_8, &pctl->mcfg);
+ writel(0x001c0004, &grf->ddrc0_con0);
+
+ setbits_le32(&pctl->scfg, HW_LOW_POWER_EN);
+}
+
+static int ddrphy_data_training(struct rk3368_ddr_pctl *pctl,
+ struct rk3368_ddrphy *ddrphy)
+{
+ const u32 trefi = readl(&pctl->trefi);
+ const ulong timeout_ms = 500;
+ ulong tmp;
+
+ /* disable auto-refresh */
+ writel(0 | BIT(31), &pctl->trefi);
+
+ clrsetbits_le32(&ddrphy->reg[2], 0x33, 0x20);
+ clrsetbits_le32(&ddrphy->reg[2], 0x33, 0x21);
+
+ tmp = get_timer(0);
+ do {
+ if (get_timer(tmp) > timeout_ms) {
+ error("%s: did not complete within %ld ms\n",
+ __func__, timeout_ms);
+ return -ETIME;
+ }
+ } while ((readl(&ddrphy->reg[0xff]) & 0xf) != 0xf);
+
+ send_command(pctl, MCMD_RANK0 | MCMD_RANK1, PREA_CMD);
+ clrsetbits_le32(&ddrphy->reg[2], 0x33, 0x20);
+ /* resume auto-refresh */
+ writel(trefi | BIT(31), &pctl->trefi);
+
+ return 0;
+}
+
+static int sdram_col_row_detect(struct udevice *dev)
+{
+ struct dram_info *priv = dev_get_priv(dev);
+ struct rk3368_sdram_params *params = dev_get_platdata(dev);
+ struct rk3368_ddr_pctl *pctl = priv->pctl;
+ struct rk3368_msch *msch = priv->msch;
+ const u32 test_pattern = 0x5aa5f00f;
+ int row, col;
+ uintptr_t addr;
+
+ move_to_config_state(pctl);
+ writel(6, &msch->ddrconf);
+ move_to_access_state(pctl);
+
+ /* Detect col */
+ for (col = 11; col >= 9; col--) {
+ writel(0, CONFIG_SYS_SDRAM_BASE);
+ addr = CONFIG_SYS_SDRAM_BASE +
+ (1 << (col + params->chan.bw - 1));
+ writel(test_pattern, addr);
+ if ((readl(addr) == test_pattern) &&
+ (readl(CONFIG_SYS_SDRAM_BASE) == 0))
+ break;
+ }
+
+ if (col == 8) {
+ error("%s: col detect error\n", __func__);
+ return -EINVAL;
+ }
+
+ move_to_config_state(pctl);
+ writel(15, &msch->ddrconf);
+ move_to_access_state(pctl);
+
+ /* Detect row*/
+ for (row = 16; row >= 12; row--) {
+ writel(0, CONFIG_SYS_SDRAM_BASE);
+ addr = CONFIG_SYS_SDRAM_BASE + (1 << (row + 15 - 1));
+ writel(test_pattern, addr);
+ if ((readl(addr) == test_pattern) &&
+ (readl(CONFIG_SYS_SDRAM_BASE) == 0))
+ break;
+ }
+
+ if (row == 11) {
+ error("%s: row detect error\n", __func__);
+ return -EINVAL;
+ }
+
+ /* Record results */
+ debug("%s: col %d, row %d\n", __func__, col, row);
+ params->chan.col = col;
+ params->chan.cs0_row = row;
+ params->chan.cs1_row = row;
+ params->chan.row_3_4 = 0;
+
+ return 0;
+}
+
+static int msch_niu_config(struct rk3368_msch *msch,
+ struct rk3368_sdram_params *params)
+{
+ int i;
+ const u8 cols = params->chan.col - ((params->chan.bw == 2) ? 0 : 1);
+ const u8 rows = params->chan.cs0_row;
+
+ /*
+ * The DDR address-translation table always assumes a 32bit
+ * bus and the comparison below takes care of adjusting for
+ * a 16bit bus (i.e. one column-address is consumed).
+ */
+ const struct {
+ u8 rows;
+ u8 columns;
+ u8 type;
+ } ddrconf_table[] = {
+ /*
+ * C-B-R-D patterns are first. For these we require an
+ * exact match for the columns and rows (as there's
+ * one entry per possible configuration).
+ */
+ [0] = { .rows = 13, .columns = 10, .type = DMC_MSCH_CBRD },
+ [1] = { .rows = 14, .columns = 10, .type = DMC_MSCH_CBRD },
+ [2] = { .rows = 15, .columns = 10, .type = DMC_MSCH_CBRD },
+ [3] = { .rows = 16, .columns = 10, .type = DMC_MSCH_CBRD },
+ [4] = { .rows = 14, .columns = 11, .type = DMC_MSCH_CBRD },
+ [5] = { .rows = 15, .columns = 11, .type = DMC_MSCH_CBRD },
+ [6] = { .rows = 16, .columns = 11, .type = DMC_MSCH_CBRD },
+ [7] = { .rows = 13, .columns = 9, .type = DMC_MSCH_CBRD },
+ [8] = { .rows = 14, .columns = 9, .type = DMC_MSCH_CBRD },
+ [9] = { .rows = 15, .columns = 9, .type = DMC_MSCH_CBRD },
+ [10] = { .rows = 16, .columns = 9, .type = DMC_MSCH_CBRD },
+ /*
+ * 11 through 13 are C-R-B-D patterns. These are
+ * matched for an exact number of columns and to
+ * ensure that the hardware uses at least as many rows
+ * as the pattern requires (i.e. we make sure that
+ * there's no gaps up until we hit the device/chip-select;
+ * however, these patterns can accept up to 16 rows,
+ * as the row-address continues right after the CS
+ * switching)
+ */
+ [11] = { .rows = 15, .columns = 10, .type = DMC_MSCH_CRBD },
+ [12] = { .rows = 14, .columns = 11, .type = DMC_MSCH_CRBD },
+ [13] = { .rows = 13, .columns = 10, .type = DMC_MSCH_CRBD },
+ /*
+ * 14 and 15 are catch-all variants using a C-B-D-R
+ * scheme (i.e. alternating the chip-select every time
+ * C-B overflows) and stuffing the remaining C-bits
+ * into the top. Matching needs to make sure that the
+ * number of columns is either an exact match (i.e. we
+ * can use less the the maximum number of rows) -or-
+ * that the columns exceed what is given in this table
+ * and the rows are an exact match (in which case the
+ * remaining C-bits will be stuffed onto the top after
+ * the device/chip-select switches).
+ */
+ [14] = { .rows = 16, .columns = 10, .type = DMC_MSCH_CBDR },
+ [15] = { .rows = 16, .columns = 9, .type = DMC_MSCH_CBDR },
+ };
+
+ /*
+ * For C-B-R-D, we need an exact match (i.e. both for the number of
+ * columns and rows), while for C-B-D-R, only the the number of
+ * columns needs to match.
+ */
+ for (i = 0; i < ARRAY_SIZE(ddrconf_table); i++) {
+ bool match = false;
+
+ /* If this entry if for a different matcher, then skip it */
+ if (ddrconf_table[i].type != params->memory_schedule)
+ continue;
+
+ /*
+ * Match according to the rules (exact/inexact/at-least)
+ * documented in the ddrconf_table above.
+ */
+ switch (params->memory_schedule) {
+ case DMC_MSCH_CBRD:
+ match = (ddrconf_table[i].columns == cols) &&
+ (ddrconf_table[i].rows == rows);
+ break;
+
+ case DMC_MSCH_CRBD:
+ match = (ddrconf_table[i].columns == cols) &&
+ (ddrconf_table[i].rows <= rows);
+ break;
+
+ case DMC_MSCH_CBDR:
+ match = (ddrconf_table[i].columns == cols) ||
+ ((ddrconf_table[i].columns <= cols) &&
+ (ddrconf_table[i].rows == rows));
+ break;
+
+ default:
+ break;
+ }
+
+ if (match) {
+ debug("%s: setting ddrconf 0x%x\n", __func__, i);
+ writel(i, &msch->ddrconf);
+ return 0;
+ }
+ }
+
+ error("%s: ddrconf (NIU config) not found\n", __func__);
+ return -EINVAL;
+}
+
+static void dram_all_config(struct udevice *dev)
+{
+ struct dram_info *priv = dev_get_priv(dev);
+ struct rk3368_pmu_grf *pmugrf = priv->pmugrf;
+ struct rk3368_sdram_params *params = dev_get_platdata(dev);
+ const struct rk3288_sdram_channel *info = &params->chan;
+ u32 sys_reg = 0;
+ const int chan = 0;
+
+ sys_reg |= DDR3 << SYS_REG_DDRTYPE_SHIFT;
+ sys_reg |= 0 << SYS_REG_NUM_CH_SHIFT;
+
+ sys_reg |= info->row_3_4 << SYS_REG_ROW_3_4_SHIFT(chan);
+ sys_reg |= 1 << SYS_REG_CHINFO_SHIFT(chan);
+ sys_reg |= (info->rank - 1) << SYS_REG_RANK_SHIFT(chan);
+ sys_reg |= (info->col - 9) << SYS_REG_COL_SHIFT(chan);
+ sys_reg |= info->bk == 3 ? 0 : 1 << SYS_REG_BK_SHIFT(chan);
+ sys_reg |= (info->cs0_row - 13) << SYS_REG_CS0_ROW_SHIFT(chan);
+ sys_reg |= (info->cs1_row - 13) << SYS_REG_CS1_ROW_SHIFT(chan);
+ sys_reg |= (2 >> info->bw) << SYS_REG_BW_SHIFT(chan);
+ sys_reg |= (2 >> info->dbw) << SYS_REG_DBW_SHIFT(chan);
+
+ writel(sys_reg, &pmugrf->os_reg[2]);
+}
+
+static int setup_sdram(struct udevice *dev)
+{
+ struct dram_info *priv = dev_get_priv(dev);
+ struct rk3368_sdram_params *params = dev_get_platdata(dev);
+
+ struct rk3368_ddr_pctl *pctl = priv->pctl;
+ struct rk3368_ddrphy *ddrphy = priv->phy;
+ struct rk3368_cru *cru = priv->cru;
+ struct rk3368_grf *grf = priv->grf;
+ struct rk3368_msch *msch = priv->msch;
+
+ int ret;
+
+ /* The input clock (i.e. DPLL) needs to be 2x the DRAM frequency */
+ ret = clk_set_rate(&priv->ddr_clk, 2 * params->ddr_freq);
+ if (ret < 0) {
+ debug("%s: could not set DDR clock: %d\n", __func__, ret);
+ return ret;
+ }
+
+ /* Update the read-latency for the RK3368 */
+ writel(0x32, &msch->readlatency);
+
+ /* Initialise the DDR PCTL and DDR PHY */
+ ddrctl_reset(cru);
+ ddrphy_reset(ddrphy);
+ ddrphy_config_delays(ddrphy, params->ddr_freq);
+ dfi_cfg(pctl);
+ /* Configure relative system information of grf_ddrc0_con0 register */
+ ddr_set_ddr3_mode(grf, true);
+ ddr_set_noc_spr_err_stall(grf, true);
+ /* Calculate timings */
+ pctl_calc_timings(params, params->ddr_freq);
+ /* Initialise the device timings in protocol controller */
+ pctl_cfg(pctl, params, grf);
+ /* Configure AL, CL ... information of PHY registers */
+ ddrphy_config(ddrphy,
+ params->pctl_timing.tcl,
+ params->pctl_timing.tal,
+ params->pctl_timing.tcwl);
+
+ /* Initialize DRAM and configure with mode-register values */
+ ret = memory_init(pctl, params);
+ if (ret)
+ goto error;
+
+ move_to_config_state(pctl);
+ /* Perform data-training */
+ ddrphy_data_training(pctl, ddrphy);
+ move_to_access_state(pctl);
+
+ /* TODO(prt): could detect rank in training... */
+ params->chan.rank = 2;
+ /* TODO(prt): bus width is not auto-detected (yet)... */
+ params->chan.bw = 2; /* 32bit wide bus */
+ params->chan.dbw = params->chan.dbw; /* 32bit wide bus */
+
+ /* DDR3 is always 8 bank */
+ params->chan.bk = 3;
+ /* Detect col and row number */
+ ret = sdram_col_row_detect(dev);
+ if (ret)
+ goto error;
+
+ /* Configure NIU DDR configuration */
+ ret = msch_niu_config(msch, params);
+ if (ret)
+ goto error;
+
+ /* set up OS_REG to communicate w/ next stage and OS */
+ dram_all_config(dev);
+
+ return 0;
+
+error:
+ printf("DRAM init failed!\n");
+ hang();
+}
+#endif
+
+static int rk3368_dmc_ofdata_to_platdata(struct udevice *dev)
+{
+ int ret = 0;
+
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
+ struct rk3368_sdram_params *plat = dev_get_platdata(dev);
+
+ ret = regmap_init_mem(dev, &plat->map);
+ if (ret)
+ return ret;
+#endif
+
+ return ret;
+}
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+static int conv_of_platdata(struct udevice *dev)
+{
+ struct rk3368_sdram_params *plat = dev_get_platdata(dev);
+ struct dtd_rockchip_rk3368_dmc *of_plat = &plat->of_plat;
+ int ret;
+
+ plat->ddr_freq = of_plat->rockchip_ddr_frequency;
+ plat->ddr_speed_bin = of_plat->rockchip_ddr_speed_bin;
+ plat->memory_schedule = of_plat->rockchip_memory_schedule;
+
+ ret = regmap_init_mem_platdata(dev, of_plat->reg,
+ ARRAY_SIZE(of_plat->reg) / 2,
+ &plat->map);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+#endif
+
+static int rk3368_dmc_probe(struct udevice *dev)
+{
+#ifdef CONFIG_TPL_BUILD
+ struct rk3368_sdram_params *plat = dev_get_platdata(dev);
+ struct rk3368_ddr_pctl *pctl;
+ struct rk3368_ddrphy *ddrphy;
+ struct rk3368_cru *cru;
+ struct rk3368_grf *grf;
+ struct rk3368_msch *msch;
+ int ret;
+ struct udevice *dev_clk;
+#endif
+ struct dram_info *priv = dev_get_priv(dev);
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+ ret = conv_of_platdata(dev);
+ if (ret)
+ return ret;
+#endif
+
+ priv->pmugrf = syscon_get_first_range(ROCKCHIP_SYSCON_PMUGRF);
+ debug("%s: pmugrf=%p\n", __func__, priv->pmugrf);
+
+#ifdef CONFIG_TPL_BUILD
+ pctl = regmap_get_range(plat->map, 0);
+ ddrphy = regmap_get_range(plat->map, 1);
+ msch = syscon_get_first_range(ROCKCHIP_SYSCON_MSCH);
+ grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+
+ priv->pctl = pctl;
+ priv->phy = ddrphy;
+ priv->msch = msch;
+ priv->grf = grf;
+
+ ret = rockchip_get_clk(&dev_clk);
+ if (ret)
+ return ret;
+ priv->ddr_clk.id = CLK_DDR;
+ ret = clk_request(dev_clk, &priv->ddr_clk);
+ if (ret)
+ return ret;
+
+ cru = rockchip_get_cru();
+ priv->cru = cru;
+ if (IS_ERR(priv->cru))
+ return PTR_ERR(priv->cru);
+
+ ret = setup_sdram(dev);
+ if (ret)
+ return ret;
+#endif
+
+ priv->info.base = 0;
+ priv->info.size =
+ rockchip_sdram_size((phys_addr_t)&priv->pmugrf->os_reg[2]);
+
+ /*
+ * we use the 0x00000000~0xfdffffff space since 0xff000000~0xffffffff
+ * is SoC register space (i.e. reserved), and 0xfe000000~0xfeffffff is
+ * inaccessible for some IP controller.
+ */
+ priv->info.size = min(priv->info.size, (size_t)0xfe000000);
+
+ return 0;
+}
+
+static int rk3368_dmc_get_info(struct udevice *dev, struct ram_info *info)
+{
+ struct dram_info *priv = dev_get_priv(dev);
+
+ *info = priv->info;
+ return 0;
+}
+
+static struct ram_ops rk3368_dmc_ops = {
+ .get_info = rk3368_dmc_get_info,
+};
+
+
+static const struct udevice_id rk3368_dmc_ids[] = {
+ { .compatible = "rockchip,rk3368-dmc" },
+ { }
+};
+
+U_BOOT_DRIVER(dmc_rk3368) = {
+ .name = "rockchip_rk3368_dmc",
+ .id = UCLASS_RAM,
+ .of_match = rk3368_dmc_ids,
+ .ops = &rk3368_dmc_ops,
+ .probe = rk3368_dmc_probe,
+ .priv_auto_alloc_size = sizeof(struct dram_info),
+ .ofdata_to_platdata = rk3368_dmc_ofdata_to_platdata,
+ .probe = rk3368_dmc_probe,
+ .priv_auto_alloc_size = sizeof(struct dram_info),
+ .platdata_auto_alloc_size = sizeof(struct rk3368_sdram_params),
+};
generated by cgit (git 2.34.1) at 2024-12-23 18:01:30 +0000