omap4: make omap4 code common for future reuse
Much of omap4 soc support code can be reused for omap5.
Move them to the omap-common directory to facilitate
this.
Signed-off-by: sricharan <r.sricharan@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/arch/arm/cpu/armv7/omap-common/emif-common.c b/arch/arm/cpu/armv7/omap-common/emif-common.c
new file mode 100644
index 0000000..94c8bed
--- /dev/null
+++ b/arch/arm/cpu/armv7/omap-common/emif-common.c
@@ -0,0 +1,1254 @@
+/*
+ * EMIF programming
+ *
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * Aneesh V <aneesh@ti.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/arch/emif.h>
+#include <asm/arch/clocks.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/omap_common.h>
+#include <asm/utils.h>
+
+static inline u32 emif_num(u32 base)
+{
+ if (base == OMAP44XX_EMIF1)
+ return 1;
+ else if (base == OMAP44XX_EMIF2)
+ return 2;
+ else
+ return 0;
+}
+
+static inline u32 get_mr(u32 base, u32 cs, u32 mr_addr)
+{
+ u32 mr;
+ struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
+
+ mr_addr |= cs << OMAP44XX_REG_CS_SHIFT;
+ writel(mr_addr, &emif->emif_lpddr2_mode_reg_cfg);
+ if (omap_revision() == OMAP4430_ES2_0)
+ mr = readl(&emif->emif_lpddr2_mode_reg_data_es2);
+ else
+ mr = readl(&emif->emif_lpddr2_mode_reg_data);
+ debug("get_mr: EMIF%d cs %d mr %08x val 0x%x\n", emif_num(base),
+ cs, mr_addr, mr);
+ return mr;
+}
+
+static inline void set_mr(u32 base, u32 cs, u32 mr_addr, u32 mr_val)
+{
+ struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
+
+ mr_addr |= cs << OMAP44XX_REG_CS_SHIFT;
+ writel(mr_addr, &emif->emif_lpddr2_mode_reg_cfg);
+ writel(mr_val, &emif->emif_lpddr2_mode_reg_data);
+}
+
+void emif_reset_phy(u32 base)
+{
+ struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
+ u32 iodft;
+
+ iodft = readl(&emif->emif_iodft_tlgc);
+ iodft |= OMAP44XX_REG_RESET_PHY_MASK;
+ writel(iodft, &emif->emif_iodft_tlgc);
+}
+
+static void do_lpddr2_init(u32 base, u32 cs)
+{
+ u32 mr_addr;
+
+ /* Wait till device auto initialization is complete */
+ while (get_mr(base, cs, LPDDR2_MR0) & LPDDR2_MR0_DAI_MASK)
+ ;
+ set_mr(base, cs, LPDDR2_MR10, MR10_ZQ_ZQINIT);
+ /*
+ * tZQINIT = 1 us
+ * Enough loops assuming a maximum of 2GHz
+ */
+ sdelay(2000);
+ set_mr(base, cs, LPDDR2_MR1, MR1_BL_8_BT_SEQ_WRAP_EN_NWR_3);
+ set_mr(base, cs, LPDDR2_MR16, MR16_REF_FULL_ARRAY);
+ /*
+ * Enable refresh along with writing MR2
+ * Encoding of RL in MR2 is (RL - 2)
+ */
+ mr_addr = LPDDR2_MR2 | OMAP44XX_REG_REFRESH_EN_MASK;
+ set_mr(base, cs, mr_addr, RL_FINAL - 2);
+}
+
+static void lpddr2_init(u32 base, const struct emif_regs *regs)
+{
+ struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
+
+ /* Not NVM */
+ clrbits_le32(&emif->emif_lpddr2_nvm_config, OMAP44XX_REG_CS1NVMEN_MASK);
+
+ /*
+ * Keep REG_INITREF_DIS = 1 to prevent re-initialization of SDRAM
+ * when EMIF_SDRAM_CONFIG register is written
+ */
+ setbits_le32(&emif->emif_sdram_ref_ctrl, OMAP44XX_REG_INITREF_DIS_MASK);
+
+ /*
+ * Set the SDRAM_CONFIG and PHY_CTRL for the
+ * un-locked frequency & default RL
+ */
+ writel(regs->sdram_config_init, &emif->emif_sdram_config);
+ writel(regs->emif_ddr_phy_ctlr_1_init, &emif->emif_ddr_phy_ctrl_1);
+
+ do_lpddr2_init(base, CS0);
+ if (regs->sdram_config & OMAP44XX_REG_EBANK_MASK)
+ do_lpddr2_init(base, CS1);
+
+ writel(regs->sdram_config, &emif->emif_sdram_config);
+ writel(regs->emif_ddr_phy_ctlr_1, &emif->emif_ddr_phy_ctrl_1);
+
+ /* Enable refresh now */
+ clrbits_le32(&emif->emif_sdram_ref_ctrl, OMAP44XX_REG_INITREF_DIS_MASK);
+
+}
+
+static void emif_update_timings(u32 base, const struct emif_regs *regs)
+{
+ struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
+
+ writel(regs->ref_ctrl, &emif->emif_sdram_ref_ctrl_shdw);
+ writel(regs->sdram_tim1, &emif->emif_sdram_tim_1_shdw);
+ writel(regs->sdram_tim2, &emif->emif_sdram_tim_2_shdw);
+ writel(regs->sdram_tim3, &emif->emif_sdram_tim_3_shdw);
+ if (omap_revision() == OMAP4430_ES1_0) {
+ /* ES1 bug EMIF should be in force idle during freq_update */
+ writel(0, &emif->emif_pwr_mgmt_ctrl);
+ } else {
+ writel(EMIF_PWR_MGMT_CTRL, &emif->emif_pwr_mgmt_ctrl);
+ writel(EMIF_PWR_MGMT_CTRL_SHDW, &emif->emif_pwr_mgmt_ctrl_shdw);
+ }
+ writel(regs->read_idle_ctrl, &emif->emif_read_idlectrl_shdw);
+ writel(regs->zq_config, &emif->emif_zq_config);
+ writel(regs->temp_alert_config, &emif->emif_temp_alert_config);
+ writel(regs->emif_ddr_phy_ctlr_1, &emif->emif_ddr_phy_ctrl_1_shdw);
+
+ if (omap_revision() >= OMAP4460_ES1_0) {
+ writel(EMIF_L3_CONFIG_VAL_SYS_10_MPU_3_LL_0,
+ &emif->emif_l3_config);
+ } else {
+ writel(EMIF_L3_CONFIG_VAL_SYS_10_LL_0,
+ &emif->emif_l3_config);
+ }
+}
+
+#ifndef CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS
+#define print_timing_reg(reg) debug(#reg" - 0x%08x\n", (reg))
+
+static u32 *const T_num = (u32 *)OMAP4_SRAM_SCRATCH_EMIF_T_NUM;
+static u32 *const T_den = (u32 *)OMAP4_SRAM_SCRATCH_EMIF_T_DEN;
+static u32 *const emif_sizes = (u32 *)OMAP4_SRAM_SCRATCH_EMIF_SIZE;
+
+/*
+ * Organization and refresh requirements for LPDDR2 devices of different
+ * types and densities. Derived from JESD209-2 section 2.4
+ */
+const struct lpddr2_addressing addressing_table[] = {
+ /* Banks tREFIx10 rowx32,rowx16 colx32,colx16 density */
+ {BANKS4, T_REFI_15_6, {ROW_12, ROW_12}, {COL_7, COL_8} },/*64M */
+ {BANKS4, T_REFI_15_6, {ROW_12, ROW_12}, {COL_8, COL_9} },/*128M */
+ {BANKS4, T_REFI_7_8, {ROW_13, ROW_13}, {COL_8, COL_9} },/*256M */
+ {BANKS4, T_REFI_7_8, {ROW_13, ROW_13}, {COL_9, COL_10} },/*512M */
+ {BANKS8, T_REFI_7_8, {ROW_13, ROW_13}, {COL_9, COL_10} },/*1GS4 */
+ {BANKS8, T_REFI_3_9, {ROW_14, ROW_14}, {COL_9, COL_10} },/*2GS4 */
+ {BANKS8, T_REFI_3_9, {ROW_14, ROW_14}, {COL_10, COL_11} },/*4G */
+ {BANKS8, T_REFI_3_9, {ROW_15, ROW_15}, {COL_10, COL_11} },/*8G */
+ {BANKS4, T_REFI_7_8, {ROW_14, ROW_14}, {COL_9, COL_10} },/*1GS2 */
+ {BANKS4, T_REFI_3_9, {ROW_15, ROW_15}, {COL_9, COL_10} },/*2GS2 */
+};
+
+static const u32 lpddr2_density_2_size_in_mbytes[] = {
+ 8, /* 64Mb */
+ 16, /* 128Mb */
+ 32, /* 256Mb */
+ 64, /* 512Mb */
+ 128, /* 1Gb */
+ 256, /* 2Gb */
+ 512, /* 4Gb */
+ 1024, /* 8Gb */
+ 2048, /* 16Gb */
+ 4096 /* 32Gb */
+};
+
+/*
+ * Calculate the period of DDR clock from frequency value and set the
+ * denominator and numerator in global variables for easy access later
+ */
+static void set_ddr_clk_period(u32 freq)
+{
+ /*
+ * period = 1/freq
+ * period_in_ns = 10^9/freq
+ */
+ *T_num = 1000000000;
+ *T_den = freq;
+ cancel_out(T_num, T_den, 200);
+
+}
+
+/*
+ * Convert time in nano seconds to number of cycles of DDR clock
+ */
+static inline u32 ns_2_cycles(u32 ns)
+{
+ return ((ns * (*T_den)) + (*T_num) - 1) / (*T_num);
+}
+
+/*
+ * ns_2_cycles with the difference that the time passed is 2 times the actual
+ * value(to avoid fractions). The cycles returned is for the original value of
+ * the timing parameter
+ */
+static inline u32 ns_x2_2_cycles(u32 ns)
+{
+ return ((ns * (*T_den)) + (*T_num) * 2 - 1) / ((*T_num) * 2);
+}
+
+/*
+ * Find addressing table index based on the device's type(S2 or S4) and
+ * density
+ */
+s8 addressing_table_index(u8 type, u8 density, u8 width)
+{
+ u8 index;
+ if ((density > LPDDR2_DENSITY_8Gb) || (width == LPDDR2_IO_WIDTH_8))
+ return -1;
+
+ /*
+ * Look at the way ADDR_TABLE_INDEX* values have been defined
+ * in emif.h compared to LPDDR2_DENSITY_* values
+ * The table is layed out in the increasing order of density
+ * (ignoring type). The exceptions 1GS2 and 2GS2 have been placed
+ * at the end
+ */
+ if ((type == LPDDR2_TYPE_S2) && (density == LPDDR2_DENSITY_1Gb))
+ index = ADDR_TABLE_INDEX1GS2;
+ else if ((type == LPDDR2_TYPE_S2) && (density == LPDDR2_DENSITY_2Gb))
+ index = ADDR_TABLE_INDEX2GS2;
+ else
+ index = density;
+
+ debug("emif: addressing table index %d\n", index);
+
+ return index;
+}
+
+/*
+ * Find the the right timing table from the array of timing
+ * tables of the device using DDR clock frequency
+ */
+static const struct lpddr2_ac_timings *get_timings_table(const struct
+ lpddr2_ac_timings const *const *device_timings,
+ u32 freq)
+{
+ u32 i, temp, freq_nearest;
+ const struct lpddr2_ac_timings *timings = 0;
+
+ emif_assert(freq <= MAX_LPDDR2_FREQ);
+ emif_assert(device_timings);
+
+ /*
+ * Start with the maximum allowed frequency - that is always safe
+ */
+ freq_nearest = MAX_LPDDR2_FREQ;
+ /*
+ * Find the timings table that has the max frequency value:
+ * i. Above or equal to the DDR frequency - safe
+ * ii. The lowest that satisfies condition (i) - optimal
+ */
+ for (i = 0; (i < MAX_NUM_SPEEDBINS) && device_timings[i]; i++) {
+ temp = device_timings[i]->max_freq;
+ if ((temp >= freq) && (temp <= freq_nearest)) {
+ freq_nearest = temp;
+ timings = device_timings[i];
+ }
+ }
+ debug("emif: timings table: %d\n", freq_nearest);
+ return timings;
+}
+
+/*
+ * Finds the value of emif_sdram_config_reg
+ * All parameters are programmed based on the device on CS0.
+ * If there is a device on CS1, it will be same as that on CS0 or
+ * it will be NVM. We don't support NVM yet.
+ * If cs1_device pointer is NULL it is assumed that there is no device
+ * on CS1
+ */
+static u32 get_sdram_config_reg(const struct lpddr2_device_details *cs0_device,
+ const struct lpddr2_device_details *cs1_device,
+ const struct lpddr2_addressing *addressing,
+ u8 RL)
+{
+ u32 config_reg = 0;
+
+ config_reg |= (cs0_device->type + 4) << OMAP44XX_REG_SDRAM_TYPE_SHIFT;
+ config_reg |= EMIF_INTERLEAVING_POLICY_MAX_INTERLEAVING <<
+ OMAP44XX_REG_IBANK_POS_SHIFT;
+
+ config_reg |= cs0_device->io_width << OMAP44XX_REG_NARROW_MODE_SHIFT;
+
+ config_reg |= RL << OMAP44XX_REG_CL_SHIFT;
+
+ config_reg |= addressing->row_sz[cs0_device->io_width] <<
+ OMAP44XX_REG_ROWSIZE_SHIFT;
+
+ config_reg |= addressing->num_banks << OMAP44XX_REG_IBANK_SHIFT;
+
+ config_reg |= (cs1_device ? EBANK_CS1_EN : EBANK_CS1_DIS) <<
+ OMAP44XX_REG_EBANK_SHIFT;
+
+ config_reg |= addressing->col_sz[cs0_device->io_width] <<
+ OMAP44XX_REG_PAGESIZE_SHIFT;
+
+ return config_reg;
+}
+
+static u32 get_sdram_ref_ctrl(u32 freq,
+ const struct lpddr2_addressing *addressing)
+{
+ u32 ref_ctrl = 0, val = 0, freq_khz;
+ freq_khz = freq / 1000;
+ /*
+ * refresh rate to be set is 'tREFI * freq in MHz
+ * division by 10000 to account for khz and x10 in t_REFI_us_x10
+ */
+ val = addressing->t_REFI_us_x10 * freq_khz / 10000;
+ ref_ctrl |= val << OMAP44XX_REG_REFRESH_RATE_SHIFT;
+
+ return ref_ctrl;
+}
+
+static u32 get_sdram_tim_1_reg(const struct lpddr2_ac_timings *timings,
+ const struct lpddr2_min_tck *min_tck,
+ const struct lpddr2_addressing *addressing)
+{
+ u32 tim1 = 0, val = 0;
+ val = max(min_tck->tWTR, ns_x2_2_cycles(timings->tWTRx2)) - 1;
+ tim1 |= val << OMAP44XX_REG_T_WTR_SHIFT;
+
+ if (addressing->num_banks == BANKS8)
+ val = (timings->tFAW * (*T_den) + 4 * (*T_num) - 1) /
+ (4 * (*T_num)) - 1;
+ else
+ val = max(min_tck->tRRD, ns_2_cycles(timings->tRRD)) - 1;
+
+ tim1 |= val << OMAP44XX_REG_T_RRD_SHIFT;
+
+ val = ns_2_cycles(timings->tRASmin + timings->tRPab) - 1;
+ tim1 |= val << OMAP44XX_REG_T_RC_SHIFT;
+
+ val = max(min_tck->tRAS_MIN, ns_2_cycles(timings->tRASmin)) - 1;
+ tim1 |= val << OMAP44XX_REG_T_RAS_SHIFT;
+
+ val = max(min_tck->tWR, ns_2_cycles(timings->tWR)) - 1;
+ tim1 |= val << OMAP44XX_REG_T_WR_SHIFT;
+
+ val = max(min_tck->tRCD, ns_2_cycles(timings->tRCD)) - 1;
+ tim1 |= val << OMAP44XX_REG_T_RCD_SHIFT;
+
+ val = max(min_tck->tRP_AB, ns_2_cycles(timings->tRPab)) - 1;
+ tim1 |= val << OMAP44XX_REG_T_RP_SHIFT;
+
+ return tim1;
+}
+
+static u32 get_sdram_tim_2_reg(const struct lpddr2_ac_timings *timings,
+ const struct lpddr2_min_tck *min_tck)
+{
+ u32 tim2 = 0, val = 0;
+ val = max(min_tck->tCKE, timings->tCKE) - 1;
+ tim2 |= val << OMAP44XX_REG_T_CKE_SHIFT;
+
+ val = max(min_tck->tRTP, ns_x2_2_cycles(timings->tRTPx2)) - 1;
+ tim2 |= val << OMAP44XX_REG_T_RTP_SHIFT;
+
+ /*
+ * tXSRD = tRFCab + 10 ns. XSRD and XSNR should have the
+ * same value
+ */
+ val = ns_2_cycles(timings->tXSR) - 1;
+ tim2 |= val << OMAP44XX_REG_T_XSRD_SHIFT;
+ tim2 |= val << OMAP44XX_REG_T_XSNR_SHIFT;
+
+ val = max(min_tck->tXP, ns_x2_2_cycles(timings->tXPx2)) - 1;
+ tim2 |= val << OMAP44XX_REG_T_XP_SHIFT;
+
+ return tim2;
+}
+
+static u32 get_sdram_tim_3_reg(const struct lpddr2_ac_timings *timings,
+ const struct lpddr2_min_tck *min_tck,
+ const struct lpddr2_addressing *addressing)
+{
+ u32 tim3 = 0, val = 0;
+ val = min(timings->tRASmax * 10 / addressing->t_REFI_us_x10 - 1, 0xF);
+ tim3 |= val << OMAP44XX_REG_T_RAS_MAX_SHIFT;
+
+ val = ns_2_cycles(timings->tRFCab) - 1;
+ tim3 |= val << OMAP44XX_REG_T_RFC_SHIFT;
+
+ val = ns_x2_2_cycles(timings->tDQSCKMAXx2) - 1;
+ tim3 |= val << OMAP44XX_REG_T_TDQSCKMAX_SHIFT;
+
+ val = ns_2_cycles(timings->tZQCS) - 1;
+ tim3 |= val << OMAP44XX_REG_ZQ_ZQCS_SHIFT;
+
+ val = max(min_tck->tCKESR, ns_2_cycles(timings->tCKESR)) - 1;
+ tim3 |= val << OMAP44XX_REG_T_CKESR_SHIFT;
+
+ return tim3;
+}
+
+static u32 get_zq_config_reg(const struct lpddr2_device_details *cs1_device,
+ const struct lpddr2_addressing *addressing,
+ u8 volt_ramp)
+{
+ u32 zq = 0, val = 0;
+ if (volt_ramp)
+ val =
+ EMIF_ZQCS_INTERVAL_DVFS_IN_US * 10 /
+ addressing->t_REFI_us_x10;
+ else
+ val =
+ EMIF_ZQCS_INTERVAL_NORMAL_IN_US * 10 /
+ addressing->t_REFI_us_x10;
+ zq |= val << OMAP44XX_REG_ZQ_REFINTERVAL_SHIFT;
+
+ zq |= (REG_ZQ_ZQCL_MULT - 1) << OMAP44XX_REG_ZQ_ZQCL_MULT_SHIFT;
+
+ zq |= (REG_ZQ_ZQINIT_MULT - 1) << OMAP44XX_REG_ZQ_ZQINIT_MULT_SHIFT;
+
+ zq |= REG_ZQ_SFEXITEN_ENABLE << OMAP44XX_REG_ZQ_SFEXITEN_SHIFT;
+
+ /*
+ * Assuming that two chipselects have a single calibration resistor
+ * If there are indeed two calibration resistors, then this flag should
+ * be enabled to take advantage of dual calibration feature.
+ * This data should ideally come from board files. But considering
+ * that none of the boards today have calibration resistors per CS,
+ * it would be an unnecessary overhead.
+ */
+ zq |= REG_ZQ_DUALCALEN_DISABLE << OMAP44XX_REG_ZQ_DUALCALEN_SHIFT;
+
+ zq |= REG_ZQ_CS0EN_ENABLE << OMAP44XX_REG_ZQ_CS0EN_SHIFT;
+
+ zq |= (cs1_device ? 1 : 0) << OMAP44XX_REG_ZQ_CS1EN_SHIFT;
+
+ return zq;
+}
+
+static u32 get_temp_alert_config(const struct lpddr2_device_details *cs1_device,
+ const struct lpddr2_addressing *addressing,
+ u8 is_derated)
+{
+ u32 alert = 0, interval;
+ interval =
+ TEMP_ALERT_POLL_INTERVAL_MS * 10000 / addressing->t_REFI_us_x10;
+ if (is_derated)
+ interval *= 4;
+ alert |= interval << OMAP44XX_REG_TA_REFINTERVAL_SHIFT;
+
+ alert |= TEMP_ALERT_CONFIG_DEVCT_1 << OMAP44XX_REG_TA_DEVCNT_SHIFT;
+
+ alert |= TEMP_ALERT_CONFIG_DEVWDT_32 << OMAP44XX_REG_TA_DEVWDT_SHIFT;
+
+ alert |= 1 << OMAP44XX_REG_TA_SFEXITEN_SHIFT;
+
+ alert |= 1 << OMAP44XX_REG_TA_CS0EN_SHIFT;
+
+ alert |= (cs1_device ? 1 : 0) << OMAP44XX_REG_TA_CS1EN_SHIFT;
+
+ return alert;
+}
+
+static u32 get_read_idle_ctrl_reg(u8 volt_ramp)
+{
+ u32 idle = 0, val = 0;
+ if (volt_ramp)
+ val = ns_2_cycles(READ_IDLE_INTERVAL_DVFS) / 64 - 1;
+ else
+ /*Maximum value in normal conditions - suggested by hw team */
+ val = 0x1FF;
+ idle |= val << OMAP44XX_REG_READ_IDLE_INTERVAL_SHIFT;
+
+ idle |= EMIF_REG_READ_IDLE_LEN_VAL << OMAP44XX_REG_READ_IDLE_LEN_SHIFT;
+
+ return idle;
+}
+
+static u32 get_ddr_phy_ctrl_1(u32 freq, u8 RL)
+{
+ u32 phy = 0, val = 0;
+
+ phy |= (RL + 2) << OMAP44XX_REG_READ_LATENCY_SHIFT;
+
+ if (freq <= 100000000)
+ val = EMIF_DLL_SLAVE_DLY_CTRL_100_MHZ_AND_LESS;
+ else if (freq <= 200000000)
+ val = EMIF_DLL_SLAVE_DLY_CTRL_200_MHZ;
+ else
+ val = EMIF_DLL_SLAVE_DLY_CTRL_400_MHZ;
+ phy |= val << OMAP44XX_REG_DLL_SLAVE_DLY_CTRL_SHIFT;
+
+ /* Other fields are constant magic values. Hardcode them together */
+ phy |= EMIF_DDR_PHY_CTRL_1_BASE_VAL <<
+ OMAP44XX_EMIF_DDR_PHY_CTRL_1_BASE_VAL_SHIFT;
+
+ return phy;
+}
+
+static u32 get_emif_mem_size(struct emif_device_details *devices)
+{
+ u32 size_mbytes = 0, temp;
+
+ if (!devices)
+ return 0;
+
+ if (devices->cs0_device_details) {
+ temp = devices->cs0_device_details->density;
+ size_mbytes += lpddr2_density_2_size_in_mbytes[temp];
+ }
+
+ if (devices->cs1_device_details) {
+ temp = devices->cs1_device_details->density;
+ size_mbytes += lpddr2_density_2_size_in_mbytes[temp];
+ }
+ /* convert to bytes */
+ return size_mbytes << 20;
+}
+
+/* Gets the encoding corresponding to a given DMM section size */
+u32 get_dmm_section_size_map(u32 section_size)
+{
+ /*
+ * Section size mapping:
+ * 0x0: 16-MiB section
+ * 0x1: 32-MiB section
+ * 0x2: 64-MiB section
+ * 0x3: 128-MiB section
+ * 0x4: 256-MiB section
+ * 0x5: 512-MiB section
+ * 0x6: 1-GiB section
+ * 0x7: 2-GiB section
+ */
+ section_size >>= 24; /* divide by 16 MB */
+ return log_2_n_round_down(section_size);
+}
+
+static void emif_calculate_regs(
+ const struct emif_device_details *emif_dev_details,
+ u32 freq, struct emif_regs *regs)
+{
+ u32 temp, sys_freq;
+ const struct lpddr2_addressing *addressing;
+ const struct lpddr2_ac_timings *timings;
+ const struct lpddr2_min_tck *min_tck;
+ const struct lpddr2_device_details *cs0_dev_details =
+ emif_dev_details->cs0_device_details;
+ const struct lpddr2_device_details *cs1_dev_details =
+ emif_dev_details->cs1_device_details;
+ const struct lpddr2_device_timings *cs0_dev_timings =
+ emif_dev_details->cs0_device_timings;
+
+ emif_assert(emif_dev_details);
+ emif_assert(regs);
+ /*
+ * You can not have a device on CS1 without one on CS0
+ * So configuring EMIF without a device on CS0 doesn't
+ * make sense
+ */
+ emif_assert(cs0_dev_details);
+ emif_assert(cs0_dev_details->type != LPDDR2_TYPE_NVM);
+ /*
+ * If there is a device on CS1 it should be same type as CS0
+ * (or NVM. But NVM is not supported in this driver yet)
+ */
+ emif_assert((cs1_dev_details == NULL) ||
+ (cs1_dev_details->type == LPDDR2_TYPE_NVM) ||
+ (cs0_dev_details->type == cs1_dev_details->type));
+ emif_assert(freq <= MAX_LPDDR2_FREQ);
+
+ set_ddr_clk_period(freq);
+
+ /*
+ * The device on CS0 is used for all timing calculations
+ * There is only one set of registers for timings per EMIF. So, if the
+ * second CS(CS1) has a device, it should have the same timings as the
+ * device on CS0
+ */
+ timings = get_timings_table(cs0_dev_timings->ac_timings, freq);
+ emif_assert(timings);
+ min_tck = cs0_dev_timings->min_tck;
+
+ temp = addressing_table_index(cs0_dev_details->type,
+ cs0_dev_details->density,
+ cs0_dev_details->io_width);
+
+ emif_assert((temp >= 0));
+ addressing = &(addressing_table[temp]);
+ emif_assert(addressing);
+
+ sys_freq = get_sys_clk_freq();
+
+ regs->sdram_config_init = get_sdram_config_reg(cs0_dev_details,
+ cs1_dev_details,
+ addressing, RL_BOOT);
+
+ regs->sdram_config = get_sdram_config_reg(cs0_dev_details,
+ cs1_dev_details,
+ addressing, RL_FINAL);
+
+ regs->ref_ctrl = get_sdram_ref_ctrl(freq, addressing);
+
+ regs->sdram_tim1 = get_sdram_tim_1_reg(timings, min_tck, addressing);
+
+ regs->sdram_tim2 = get_sdram_tim_2_reg(timings, min_tck);
+
+ regs->sdram_tim3 = get_sdram_tim_3_reg(timings, min_tck, addressing);
+
+ regs->read_idle_ctrl = get_read_idle_ctrl_reg(LPDDR2_VOLTAGE_STABLE);
+
+ regs->temp_alert_config =
+ get_temp_alert_config(cs1_dev_details, addressing, 0);
+
+ regs->zq_config = get_zq_config_reg(cs1_dev_details, addressing,
+ LPDDR2_VOLTAGE_STABLE);
+
+ regs->emif_ddr_phy_ctlr_1_init =
+ get_ddr_phy_ctrl_1(sys_freq / 2, RL_BOOT);
+
+ regs->emif_ddr_phy_ctlr_1 =
+ get_ddr_phy_ctrl_1(freq, RL_FINAL);
+
+ regs->freq = freq;
+
+ print_timing_reg(regs->sdram_config_init);
+ print_timing_reg(regs->sdram_config);
+ print_timing_reg(regs->ref_ctrl);
+ print_timing_reg(regs->sdram_tim1);
+ print_timing_reg(regs->sdram_tim2);
+ print_timing_reg(regs->sdram_tim3);
+ print_timing_reg(regs->read_idle_ctrl);
+ print_timing_reg(regs->temp_alert_config);
+ print_timing_reg(regs->zq_config);
+ print_timing_reg(regs->emif_ddr_phy_ctlr_1);
+ print_timing_reg(regs->emif_ddr_phy_ctlr_1_init);
+}
+#endif /* CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS */
+
+#ifdef CONFIG_SYS_DEFAULT_LPDDR2_TIMINGS
+/* Base AC Timing values specified by JESD209-2 for 400MHz operation */
+static const struct lpddr2_ac_timings timings_jedec_400_mhz = {
+ .max_freq = 400000000,
+ .RL = 6,
+ .tRPab = 21,
+ .tRCD = 18,
+ .tWR = 15,
+ .tRASmin = 42,
+ .tRRD = 10,
+ .tWTRx2 = 15,
+ .tXSR = 140,
+ .tXPx2 = 15,
+ .tRFCab = 130,
+ .tRTPx2 = 15,
+ .tCKE = 3,
+ .tCKESR = 15,
+ .tZQCS = 90,
+ .tZQCL = 360,
+ .tZQINIT = 1000,
+ .tDQSCKMAXx2 = 11,
+ .tRASmax = 70,
+ .tFAW = 50
+};
+
+/* Base AC Timing values specified by JESD209-2 for 333 MHz operation */
+static const struct lpddr2_ac_timings timings_jedec_333_mhz = {
+ .max_freq = 333000000,
+ .RL = 5,
+ .tRPab = 21,
+ .tRCD = 18,
+ .tWR = 15,
+ .tRASmin = 42,
+ .tRRD = 10,
+ .tWTRx2 = 15,
+ .tXSR = 140,
+ .tXPx2 = 15,
+ .tRFCab = 130,
+ .tRTPx2 = 15,
+ .tCKE = 3,
+ .tCKESR = 15,
+ .tZQCS = 90,
+ .tZQCL = 360,
+ .tZQINIT = 1000,
+ .tDQSCKMAXx2 = 11,
+ .tRASmax = 70,
+ .tFAW = 50
+};
+
+/* Base AC Timing values specified by JESD209-2 for 200 MHz operation */
+static const struct lpddr2_ac_timings timings_jedec_200_mhz = {
+ .max_freq = 200000000,
+ .RL = 3,
+ .tRPab = 21,
+ .tRCD = 18,
+ .tWR = 15,
+ .tRASmin = 42,
+ .tRRD = 10,
+ .tWTRx2 = 20,
+ .tXSR = 140,
+ .tXPx2 = 15,
+ .tRFCab = 130,
+ .tRTPx2 = 15,
+ .tCKE = 3,
+ .tCKESR = 15,
+ .tZQCS = 90,
+ .tZQCL = 360,
+ .tZQINIT = 1000,
+ .tDQSCKMAXx2 = 11,
+ .tRASmax = 70,
+ .tFAW = 50
+};
+
+/*
+ * Min tCK values specified by JESD209-2
+ * Min tCK specifies the minimum duration of some AC timing parameters in terms
+ * of the number of cycles. If the calculated number of cycles based on the
+ * absolute time value is less than the min tCK value, min tCK value should
+ * be used instead. This typically happens at low frequencies.
+ */
+static const struct lpddr2_min_tck min_tck_jedec = {
+ .tRL = 3,
+ .tRP_AB = 3,
+ .tRCD = 3,
+ .tWR = 3,
+ .tRAS_MIN = 3,
+ .tRRD = 2,
+ .tWTR = 2,
+ .tXP = 2,
+ .tRTP = 2,
+ .tCKE = 3,
+ .tCKESR = 3,
+ .tFAW = 8
+};
+
+static const struct lpddr2_ac_timings const*
+ jedec_ac_timings[MAX_NUM_SPEEDBINS] = {
+ &timings_jedec_200_mhz,
+ &timings_jedec_333_mhz,
+ &timings_jedec_400_mhz
+};
+
+static const struct lpddr2_device_timings jedec_default_timings = {
+ .ac_timings = jedec_ac_timings,
+ .min_tck = &min_tck_jedec
+};
+
+void emif_get_device_timings(u32 emif_nr,
+ const struct lpddr2_device_timings **cs0_device_timings,
+ const struct lpddr2_device_timings **cs1_device_timings)
+{
+ /* Assume Identical devices on EMIF1 & EMIF2 */
+ *cs0_device_timings = &jedec_default_timings;
+ *cs1_device_timings = &jedec_default_timings;
+}
+#endif /* CONFIG_SYS_DEFAULT_LPDDR2_TIMINGS */
+
+#ifdef CONFIG_SYS_AUTOMATIC_SDRAM_DETECTION
+const char *get_lpddr2_type(u8 type_id)
+{
+ switch (type_id) {
+ case LPDDR2_TYPE_S4:
+ return "LPDDR2-S4";
+ case LPDDR2_TYPE_S2:
+ return "LPDDR2-S2";
+ default:
+ return NULL;
+ }
+}
+
+const char *get_lpddr2_io_width(u8 width_id)
+{
+ switch (width_id) {
+ case LPDDR2_IO_WIDTH_8:
+ return "x8";
+ case LPDDR2_IO_WIDTH_16:
+ return "x16";
+ case LPDDR2_IO_WIDTH_32:
+ return "x32";
+ default:
+ return NULL;
+ }
+}
+
+const char *get_lpddr2_manufacturer(u32 manufacturer)
+{
+ switch (manufacturer) {
+ case LPDDR2_MANUFACTURER_SAMSUNG:
+ return "Samsung";
+ case LPDDR2_MANUFACTURER_QIMONDA:
+ return "Qimonda";
+ case LPDDR2_MANUFACTURER_ELPIDA:
+ return "Elpida";
+ case LPDDR2_MANUFACTURER_ETRON:
+ return "Etron";
+ case LPDDR2_MANUFACTURER_NANYA:
+ return "Nanya";
+ case LPDDR2_MANUFACTURER_HYNIX:
+ return "Hynix";
+ case LPDDR2_MANUFACTURER_MOSEL:
+ return "Mosel";
+ case LPDDR2_MANUFACTURER_WINBOND:
+ return "Winbond";
+ case LPDDR2_MANUFACTURER_ESMT:
+ return "ESMT";
+ case LPDDR2_MANUFACTURER_SPANSION:
+ return "Spansion";
+ case LPDDR2_MANUFACTURER_SST:
+ return "SST";
+ case LPDDR2_MANUFACTURER_ZMOS:
+ return "ZMOS";
+ case LPDDR2_MANUFACTURER_INTEL:
+ return "Intel";
+ case LPDDR2_MANUFACTURER_NUMONYX:
+ return "Numonyx";
+ case LPDDR2_MANUFACTURER_MICRON:
+ return "Micron";
+ default:
+ return NULL;
+ }
+}
+
+static void display_sdram_details(u32 emif_nr, u32 cs,
+ struct lpddr2_device_details *device)
+{
+ const char *mfg_str;
+ const char *type_str;
+ char density_str[10];
+ u32 density;
+
+ debug("EMIF%d CS%d\t", emif_nr, cs);
+
+ if (!device) {
+ debug("None\n");
+ return;
+ }
+
+ mfg_str = get_lpddr2_manufacturer(device->manufacturer);
+ type_str = get_lpddr2_type(device->type);
+
+ density = lpddr2_density_2_size_in_mbytes[device->density];
+ if ((density / 1024 * 1024) == density) {
+ density /= 1024;
+ sprintf(density_str, "%d GB", density);
+ } else
+ sprintf(density_str, "%d MB", density);
+ if (mfg_str && type_str)
+ debug("%s\t\t%s\t%s\n", mfg_str, type_str, density_str);
+}
+
+static u8 is_lpddr2_sdram_present(u32 base, u32 cs,
+ struct lpddr2_device_details *lpddr2_device)
+{
+ u32 mr = 0, temp;
+
+ mr = get_mr(base, cs, LPDDR2_MR0);
+ if (mr > 0xFF) {
+ /* Mode register value bigger than 8 bit */
+ return 0;
+ }
+
+ temp = (mr & LPDDR2_MR0_DI_MASK) >> LPDDR2_MR0_DI_SHIFT;
+ if (temp) {
+ /* Not SDRAM */
+ return 0;
+ }
+ temp = (mr & LPDDR2_MR0_DNVI_MASK) >> LPDDR2_MR0_DNVI_SHIFT;
+
+ if (temp) {
+ /* DNV supported - But DNV is only supported for NVM */
+ return 0;
+ }
+
+ mr = get_mr(base, cs, LPDDR2_MR4);
+ if (mr > 0xFF) {
+ /* Mode register value bigger than 8 bit */
+ return 0;
+ }
+
+ mr = get_mr(base, cs, LPDDR2_MR5);
+ if (mr >= 0xFF) {
+ /* Mode register value bigger than 8 bit */
+ return 0;
+ }
+
+ if (!get_lpddr2_manufacturer(mr)) {
+ /* Manufacturer not identified */
+ return 0;
+ }
+ lpddr2_device->manufacturer = mr;
+
+ mr = get_mr(base, cs, LPDDR2_MR6);
+ if (mr >= 0xFF) {
+ /* Mode register value bigger than 8 bit */
+ return 0;
+ }
+
+ mr = get_mr(base, cs, LPDDR2_MR7);
+ if (mr >= 0xFF) {
+ /* Mode register value bigger than 8 bit */
+ return 0;
+ }
+
+ mr = get_mr(base, cs, LPDDR2_MR8);
+ if (mr >= 0xFF) {
+ /* Mode register value bigger than 8 bit */
+ return 0;
+ }
+
+ temp = (mr & MR8_TYPE_MASK) >> MR8_TYPE_SHIFT;
+ if (!get_lpddr2_type(temp)) {
+ /* Not SDRAM */
+ return 0;
+ }
+ lpddr2_device->type = temp;
+
+ temp = (mr & MR8_DENSITY_MASK) >> MR8_DENSITY_SHIFT;
+ if (temp > LPDDR2_DENSITY_32Gb) {
+ /* Density not supported */
+ return 0;
+ }
+ lpddr2_device->density = temp;
+
+ temp = (mr & MR8_IO_WIDTH_MASK) >> MR8_IO_WIDTH_SHIFT;
+ if (!get_lpddr2_io_width(temp)) {
+ /* IO width unsupported value */
+ return 0;
+ }
+ lpddr2_device->io_width = temp;
+
+ /*
+ * If all the above tests pass we should
+ * have a device on this chip-select
+ */
+ return 1;
+}
+
+struct lpddr2_device_details *emif_get_device_details(u32 emif_nr, u8 cs,
+ struct lpddr2_device_details *lpddr2_dev_details)
+{
+ u32 phy;
+ u32 base = (emif_nr == 1) ? OMAP44XX_EMIF1 : OMAP44XX_EMIF2;
+ struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
+
+ if (!lpddr2_dev_details)
+ return NULL;
+
+ /* Do the minimum init for mode register accesses */
+ if (!running_from_sdram()) {
+ phy = get_ddr_phy_ctrl_1(get_sys_clk_freq() / 2, RL_BOOT);
+ writel(phy, &emif->emif_ddr_phy_ctrl_1);
+ }
+
+ if (!(is_lpddr2_sdram_present(base, cs, lpddr2_dev_details)))
+ return NULL;
+
+ display_sdram_details(emif_num(base), cs, lpddr2_dev_details);
+
+ return lpddr2_dev_details;
+}
+#endif /* CONFIG_SYS_AUTOMATIC_SDRAM_DETECTION */
+
+static void do_sdram_init(u32 base)
+{
+ const struct emif_regs *regs;
+ u32 in_sdram, emif_nr;
+
+ debug(">>do_sdram_init() %x\n", base);
+
+ in_sdram = running_from_sdram();
+ emif_nr = (base == OMAP44XX_EMIF1) ? 1 : 2;
+
+#ifdef CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS
+ emif_get_reg_dump(emif_nr, ®s);
+ if (!regs) {
+ debug("EMIF: reg dump not provided\n");
+ return;
+ }
+#else
+ /*
+ * The user has not provided the register values. We need to
+ * calculate it based on the timings and the DDR frequency
+ */
+ struct emif_device_details dev_details;
+ struct emif_regs calculated_regs;
+
+ /*
+ * Get device details:
+ * - Discovered if CONFIG_SYS_AUTOMATIC_SDRAM_DETECTION is set
+ * - Obtained from user otherwise
+ */
+ struct lpddr2_device_details cs0_dev_details, cs1_dev_details;
+ emif_reset_phy(base);
+ dev_details.cs0_device_details = emif_get_device_details(base, CS0,
+ &cs0_dev_details);
+ dev_details.cs1_device_details = emif_get_device_details(base, CS1,
+ &cs1_dev_details);
+ emif_reset_phy(base);
+
+ /* Return if no devices on this EMIF */
+ if (!dev_details.cs0_device_details &&
+ !dev_details.cs1_device_details) {
+ emif_sizes[emif_nr - 1] = 0;
+ return;
+ }
+
+ if (!in_sdram)
+ emif_sizes[emif_nr - 1] = get_emif_mem_size(&dev_details);
+
+ /*
+ * Get device timings:
+ * - Default timings specified by JESD209-2 if
+ * CONFIG_SYS_DEFAULT_LPDDR2_TIMINGS is set
+ * - Obtained from user otherwise
+ */
+ emif_get_device_timings(emif_nr, &dev_details.cs0_device_timings,
+ &dev_details.cs1_device_timings);
+
+ /* Calculate the register values */
+ emif_calculate_regs(&dev_details, omap4_ddr_clk(), &calculated_regs);
+ regs = &calculated_regs;
+#endif /* CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS */
+
+ /*
+ * Initializing the LPDDR2 device can not happen from SDRAM.
+ * Changing the timing registers in EMIF can happen(going from one
+ * OPP to another)
+ */
+ if (!in_sdram)
+ lpddr2_init(base, regs);
+
+ /* Write to the shadow registers */
+ emif_update_timings(base, regs);
+
+ debug("<<do_sdram_init() %x\n", base);
+}
+
+static void emif_post_init_config(u32 base)
+{
+ struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
+ u32 omap4_rev = omap_revision();
+
+ /* reset phy on ES2.0 */
+ if (omap4_rev == OMAP4430_ES2_0)
+ emif_reset_phy(base);
+
+ /* Put EMIF back in smart idle on ES1.0 */
+ if (omap4_rev == OMAP4430_ES1_0)
+ writel(0x80000000, &emif->emif_pwr_mgmt_ctrl);
+}
+
+static void dmm_init(u32 base)
+{
+ const struct dmm_lisa_map_regs *lisa_map_regs;
+
+#ifdef CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS
+ emif_get_dmm_regs(&lisa_map_regs);
+#else
+ u32 emif1_size, emif2_size, mapped_size, section_map = 0;
+ u32 section_cnt, sys_addr;
+ struct dmm_lisa_map_regs lis_map_regs_calculated = {0};
+
+ mapped_size = 0;
+ section_cnt = 3;
+ sys_addr = CONFIG_SYS_SDRAM_BASE;
+ emif1_size = emif_sizes[0];
+ emif2_size = emif_sizes[1];
+ debug("emif1_size 0x%x emif2_size 0x%x\n", emif1_size, emif2_size);
+
+ if (!emif1_size && !emif2_size)
+ return;
+
+ /* symmetric interleaved section */
+ if (emif1_size && emif2_size) {
+ mapped_size = min(emif1_size, emif2_size);
+ section_map = DMM_LISA_MAP_INTERLEAVED_BASE_VAL;
+ section_map |= 0 << OMAP44XX_SDRC_ADDR_SHIFT;
+ /* only MSB */
+ section_map |= (sys_addr >> 24) <<
+ OMAP44XX_SYS_ADDR_SHIFT;
+ section_map |= get_dmm_section_size_map(mapped_size * 2)
+ << OMAP44XX_SYS_SIZE_SHIFT;
+ lis_map_regs_calculated.dmm_lisa_map_3 = section_map;
+ emif1_size -= mapped_size;
+ emif2_size -= mapped_size;
+ sys_addr += (mapped_size * 2);
+ section_cnt--;
+ }
+
+ /*
+ * Single EMIF section(we can have a maximum of 1 single EMIF
+ * section- either EMIF1 or EMIF2 or none, but not both)
+ */
+ if (emif1_size) {
+ section_map = DMM_LISA_MAP_EMIF1_ONLY_BASE_VAL;
+ section_map |= get_dmm_section_size_map(emif1_size)
+ << OMAP44XX_SYS_SIZE_SHIFT;
+ /* only MSB */
+ section_map |= (mapped_size >> 24) <<
+ OMAP44XX_SDRC_ADDR_SHIFT;
+ /* only MSB */
+ section_map |= (sys_addr >> 24) << OMAP44XX_SYS_ADDR_SHIFT;
+ section_cnt--;
+ }
+ if (emif2_size) {
+ section_map = DMM_LISA_MAP_EMIF2_ONLY_BASE_VAL;
+ section_map |= get_dmm_section_size_map(emif2_size) <<
+ OMAP44XX_SYS_SIZE_SHIFT;
+ /* only MSB */
+ section_map |= mapped_size >> 24 << OMAP44XX_SDRC_ADDR_SHIFT;
+ /* only MSB */
+ section_map |= sys_addr >> 24 << OMAP44XX_SYS_ADDR_SHIFT;
+ section_cnt--;
+ }
+
+ if (section_cnt == 2) {
+ /* Only 1 section - either symmetric or single EMIF */
+ lis_map_regs_calculated.dmm_lisa_map_3 = section_map;
+ lis_map_regs_calculated.dmm_lisa_map_2 = 0;
+ lis_map_regs_calculated.dmm_lisa_map_1 = 0;
+ } else {
+ /* 2 sections - 1 symmetric, 1 single EMIF */
+ lis_map_regs_calculated.dmm_lisa_map_2 = section_map;
+ lis_map_regs_calculated.dmm_lisa_map_1 = 0;
+ }
+
+ /* TRAP for invalid TILER mappings in section 0 */
+ lis_map_regs_calculated.dmm_lisa_map_0 = DMM_LISA_MAP_0_INVAL_ADDR_TRAP;
+
+ lisa_map_regs = &lis_map_regs_calculated;
+#endif
+ struct dmm_lisa_map_regs *hw_lisa_map_regs =
+ (struct dmm_lisa_map_regs *)base;
+
+ writel(0, &hw_lisa_map_regs->dmm_lisa_map_3);
+ writel(0, &hw_lisa_map_regs->dmm_lisa_map_2);
+ writel(0, &hw_lisa_map_regs->dmm_lisa_map_1);
+ writel(0, &hw_lisa_map_regs->dmm_lisa_map_0);
+
+ writel(lisa_map_regs->dmm_lisa_map_3,
+ &hw_lisa_map_regs->dmm_lisa_map_3);
+ writel(lisa_map_regs->dmm_lisa_map_2,
+ &hw_lisa_map_regs->dmm_lisa_map_2);
+ writel(lisa_map_regs->dmm_lisa_map_1,
+ &hw_lisa_map_regs->dmm_lisa_map_1);
+ writel(lisa_map_regs->dmm_lisa_map_0,
+ &hw_lisa_map_regs->dmm_lisa_map_0);
+
+ if (omap_revision() >= OMAP4460_ES1_0) {
+ hw_lisa_map_regs =
+ (struct dmm_lisa_map_regs *)OMAP44XX_MA_LISA_MAP_BASE;
+
+ writel(lisa_map_regs->dmm_lisa_map_3,
+ &hw_lisa_map_regs->dmm_lisa_map_3);
+ writel(lisa_map_regs->dmm_lisa_map_2,
+ &hw_lisa_map_regs->dmm_lisa_map_2);
+ writel(lisa_map_regs->dmm_lisa_map_1,
+ &hw_lisa_map_regs->dmm_lisa_map_1);
+ writel(lisa_map_regs->dmm_lisa_map_0,
+ &hw_lisa_map_regs->dmm_lisa_map_0);
+ }
+}
+
+/*
+ * SDRAM initialization:
+ * SDRAM initialization has two parts:
+ * 1. Configuring the SDRAM device
+ * 2. Update the AC timings related parameters in the EMIF module
+ * (1) should be done only once and should not be done while we are
+ * running from SDRAM.
+ * (2) can and should be done more than once if OPP changes.
+ * Particularly, this may be needed when we boot without SPL and
+ * and using Configuration Header(CH). ROM code supports only at 50% OPP
+ * at boot (low power boot). So u-boot has to switch to OPP100 and update
+ * the frequency. So,
+ * Doing (1) and (2) makes sense - first time initialization
+ * Doing (2) and not (1) makes sense - OPP change (when using CH)
+ * Doing (1) and not (2) doen't make sense
+ * See do_sdram_init() for the details
+ */
+void sdram_init(void)
+{
+ u32 in_sdram, size_prog, size_detect;
+
+ debug(">>sdram_init()\n");
+
+ if (omap4_hw_init_context() == OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL)
+ return;
+
+ in_sdram = running_from_sdram();
+ debug("in_sdram = %d\n", in_sdram);
+
+ if (!in_sdram)
+ bypass_dpll(&prcm->cm_clkmode_dpll_core);
+
+
+ do_sdram_init(OMAP44XX_EMIF1);
+ do_sdram_init(OMAP44XX_EMIF2);
+
+ if (!in_sdram) {
+ dmm_init(OMAP44XX_DMM_LISA_MAP_BASE);
+ emif_post_init_config(OMAP44XX_EMIF1);
+ emif_post_init_config(OMAP44XX_EMIF2);
+
+ }
+
+ /* for the shadow registers to take effect */
+ freq_update_core();
+
+ /* Do some testing after the init */
+ if (!in_sdram) {
+ size_prog = omap4_sdram_size();
+ size_detect = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE,
+ size_prog);
+ /* Compare with the size programmed */
+ if (size_detect != size_prog) {
+ printf("SDRAM: identified size not same as expected"
+ " size identified: %x expected: %x\n",
+ size_detect,
+ size_prog);
+ } else
+ debug("get_ram_size() successful");
+ }
+
+ debug("<<sdram_init()\n");
+}