--- /dev/null
+/*
+ * Copyright 2008-2014 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * Version 2 as published by the Free Software Foundation.
+ */
+
+/*
+ * Generic driver for Freescale DDR/DDR2/DDR3 memory controller.
+ * Based on code from spd_sdram.c
+ * Author: James Yang [at freescale.com]
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <fsl_ddr_sdram.h>
+#include <fsl_ddr.h>
+
+/*
+ * CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY is the physical address from the view
+ * of DDR controllers. It is the same as CONFIG_SYS_DDR_SDRAM_BASE for
+ * all Power SoCs. But it could be different for ARM SoCs. For example,
+ * fsl_lsch3 has a mapping mechanism to map DDR memory to ranges (in order) of
+ * 0x00_8000_0000 ~ 0x00_ffff_ffff
+ * 0x80_8000_0000 ~ 0xff_ffff_ffff
+ */
+#ifndef CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY
+#define CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY CONFIG_SYS_DDR_SDRAM_BASE
+#endif
+
+#ifdef CONFIG_PPC
+#include <asm/fsl_law.h>
+
+void fsl_ddr_set_lawbar(
+ const common_timing_params_t *memctl_common_params,
+ unsigned int memctl_interleaved,
+ unsigned int ctrl_num);
+#endif
+
+void fsl_ddr_set_intl3r(const unsigned int granule_size);
+#if defined(SPD_EEPROM_ADDRESS) || \
+ defined(SPD_EEPROM_ADDRESS1) || defined(SPD_EEPROM_ADDRESS2) || \
+ defined(SPD_EEPROM_ADDRESS3) || defined(SPD_EEPROM_ADDRESS4)
+#if (CONFIG_NUM_DDR_CONTROLLERS == 1) && (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
+u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
+ [0][0] = SPD_EEPROM_ADDRESS,
+};
+#elif (CONFIG_NUM_DDR_CONTROLLERS == 1) && (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
+u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
+ [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */
+ [0][1] = SPD_EEPROM_ADDRESS2, /* controller 1 */
+};
+#elif (CONFIG_NUM_DDR_CONTROLLERS == 2) && (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
+u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
+ [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */
+ [1][0] = SPD_EEPROM_ADDRESS2, /* controller 2 */
+};
+#elif (CONFIG_NUM_DDR_CONTROLLERS == 2) && (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
+u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
+ [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */
+ [0][1] = SPD_EEPROM_ADDRESS2, /* controller 1 */
+ [1][0] = SPD_EEPROM_ADDRESS3, /* controller 2 */
+ [1][1] = SPD_EEPROM_ADDRESS4, /* controller 2 */
+};
+#elif (CONFIG_NUM_DDR_CONTROLLERS == 3) && (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
+u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
+ [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */
+ [1][0] = SPD_EEPROM_ADDRESS2, /* controller 2 */
+ [2][0] = SPD_EEPROM_ADDRESS3, /* controller 3 */
+};
+#elif (CONFIG_NUM_DDR_CONTROLLERS == 3) && (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
+u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
+ [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */
+ [0][1] = SPD_EEPROM_ADDRESS2, /* controller 1 */
+ [1][0] = SPD_EEPROM_ADDRESS3, /* controller 2 */
+ [1][1] = SPD_EEPROM_ADDRESS4, /* controller 2 */
+ [2][0] = SPD_EEPROM_ADDRESS5, /* controller 3 */
+ [2][1] = SPD_EEPROM_ADDRESS6, /* controller 3 */
+};
+
+#endif
+
+#define SPD_SPA0_ADDRESS 0x36
+#define SPD_SPA1_ADDRESS 0x37
+
+static void __get_spd(generic_spd_eeprom_t *spd, u8 i2c_address)
+{
+ int ret;
+#ifdef CONFIG_SYS_FSL_DDR4
+ uint8_t dummy = 0;
+#endif
+
+ i2c_set_bus_num(CONFIG_SYS_SPD_BUS_NUM);
+
+#ifdef CONFIG_SYS_FSL_DDR4
+ /*
+ * DDR4 SPD has 384 to 512 bytes
+ * To access the lower 256 bytes, we need to set EE page address to 0
+ * To access the upper 256 bytes, we need to set EE page address to 1
+ * See Jedec standar No. 21-C for detail
+ */
+ i2c_write(SPD_SPA0_ADDRESS, 0, 1, &dummy, 1);
+ ret = i2c_read(i2c_address, 0, 1, (uchar *)spd, 256);
+ if (!ret) {
+ i2c_write(SPD_SPA1_ADDRESS, 0, 1, &dummy, 1);
+ ret = i2c_read(i2c_address, 0, 1,
+ (uchar *)((ulong)spd + 256),
+ min(256, sizeof(generic_spd_eeprom_t) - 256));
+ }
+#else
+ ret = i2c_read(i2c_address, 0, 1, (uchar *)spd,
+ sizeof(generic_spd_eeprom_t));
+#endif
+
+ if (ret) {
+ if (i2c_address ==
+#ifdef SPD_EEPROM_ADDRESS
+ SPD_EEPROM_ADDRESS
+#elif defined(SPD_EEPROM_ADDRESS1)
+ SPD_EEPROM_ADDRESS1
+#endif
+ ) {
+ printf("DDR: failed to read SPD from address %u\n",
+ i2c_address);
+ } else {
+ debug("DDR: failed to read SPD from address %u\n",
+ i2c_address);
+ }
+ memset(spd, 0, sizeof(generic_spd_eeprom_t));
+ }
+}
+
+__attribute__((weak, alias("__get_spd")))
+void get_spd(generic_spd_eeprom_t *spd, u8 i2c_address);
+
+void fsl_ddr_get_spd(generic_spd_eeprom_t *ctrl_dimms_spd,
+ unsigned int ctrl_num)
+{
+ unsigned int i;
+ unsigned int i2c_address = 0;
+
+ if (ctrl_num >= CONFIG_NUM_DDR_CONTROLLERS) {
+ printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
+ return;
+ }
+
+ for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
+ i2c_address = spd_i2c_addr[ctrl_num][i];
+ get_spd(&(ctrl_dimms_spd[i]), i2c_address);
+ }
+}
+#else
+void fsl_ddr_get_spd(generic_spd_eeprom_t *ctrl_dimms_spd,
+ unsigned int ctrl_num)
+{
+}
+#endif /* SPD_EEPROM_ADDRESSx */
+
+/*
+ * ASSUMPTIONS:
+ * - Same number of CONFIG_DIMM_SLOTS_PER_CTLR on each controller
+ * - Same memory data bus width on all controllers
+ *
+ * NOTES:
+ *
+ * The memory controller and associated documentation use confusing
+ * terminology when referring to the orgranization of DRAM.
+ *
+ * Here is a terminology translation table:
+ *
+ * memory controller/documention |industry |this code |signals
+ * -------------------------------|-----------|-----------|-----------------
+ * physical bank/bank |rank |rank |chip select (CS)
+ * logical bank/sub-bank |bank |bank |bank address (BA)
+ * page/row |row |page |row address
+ * ??? |column |column |column address
+ *
+ * The naming confusion is further exacerbated by the descriptions of the
+ * memory controller interleaving feature, where accesses are interleaved
+ * _BETWEEN_ two seperate memory controllers. This is configured only in
+ * CS0_CONFIG[INTLV_CTL] of each memory controller.
+ *
+ * memory controller documentation | number of chip selects
+ * | per memory controller supported
+ * --------------------------------|-----------------------------------------
+ * cache line interleaving | 1 (CS0 only)
+ * page interleaving | 1 (CS0 only)
+ * bank interleaving | 1 (CS0 only)
+ * superbank interleraving | depends on bank (chip select)
+ * | interleraving [rank interleaving]
+ * | mode used on every memory controller
+ *
+ * Even further confusing is the existence of the interleaving feature
+ * _WITHIN_ each memory controller. The feature is referred to in
+ * documentation as chip select interleaving or bank interleaving,
+ * although it is configured in the DDR_SDRAM_CFG field.
+ *
+ * Name of field | documentation name | this code
+ * -----------------------------|-----------------------|------------------
+ * DDR_SDRAM_CFG[BA_INTLV_CTL] | Bank (chip select) | rank interleaving
+ * | interleaving
+ */
+
+const char *step_string_tbl[] = {
+ "STEP_GET_SPD",
+ "STEP_COMPUTE_DIMM_PARMS",
+ "STEP_COMPUTE_COMMON_PARMS",
+ "STEP_GATHER_OPTS",
+ "STEP_ASSIGN_ADDRESSES",
+ "STEP_COMPUTE_REGS",
+ "STEP_PROGRAM_REGS",
+ "STEP_ALL"
+};
+
+const char * step_to_string(unsigned int step) {
+
+ unsigned int s = __ilog2(step);
+
+ if ((1 << s) != step)
+ return step_string_tbl[7];
+
+ if (s >= ARRAY_SIZE(step_string_tbl)) {
+ printf("Error for the step in %s\n", __func__);
+ s = 0;
+ }
+
+ return step_string_tbl[s];
+}
+
+static unsigned long long __step_assign_addresses(fsl_ddr_info_t *pinfo,
+ unsigned int dbw_cap_adj[])
+{
+ int i, j;
+ unsigned long long total_mem, current_mem_base, total_ctlr_mem;
+ unsigned long long rank_density, ctlr_density = 0;
+
+ /*
+ * If a reduced data width is requested, but the SPD
+ * specifies a physically wider device, adjust the
+ * computed dimm capacities accordingly before
+ * assigning addresses.
+ */
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ unsigned int found = 0;
+
+ switch (pinfo->memctl_opts[i].data_bus_width) {
+ case 2:
+ /* 16-bit */
+ for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
+ unsigned int dw;
+ if (!pinfo->dimm_params[i][j].n_ranks)
+ continue;
+ dw = pinfo->dimm_params[i][j].primary_sdram_width;
+ if ((dw == 72 || dw == 64)) {
+ dbw_cap_adj[i] = 2;
+ break;
+ } else if ((dw == 40 || dw == 32)) {
+ dbw_cap_adj[i] = 1;
+ break;
+ }
+ }
+ break;
+
+ case 1:
+ /* 32-bit */
+ for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
+ unsigned int dw;
+ dw = pinfo->dimm_params[i][j].data_width;
+ if (pinfo->dimm_params[i][j].n_ranks
+ && (dw == 72 || dw == 64)) {
+ /*
+ * FIXME: can't really do it
+ * like this because this just
+ * further reduces the memory
+ */
+ found = 1;
+ break;
+ }
+ }
+ if (found) {
+ dbw_cap_adj[i] = 1;
+ }
+ break;
+
+ case 0:
+ /* 64-bit */
+ break;
+
+ default:
+ printf("unexpected data bus width "
+ "specified controller %u\n", i);
+ return 1;
+ }
+ debug("dbw_cap_adj[%d]=%d\n", i, dbw_cap_adj[i]);
+ }
+
+ current_mem_base = CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY;
+ total_mem = 0;
+ if (pinfo->memctl_opts[0].memctl_interleaving) {
+ rank_density = pinfo->dimm_params[0][0].rank_density >>
+ dbw_cap_adj[0];
+ switch (pinfo->memctl_opts[0].ba_intlv_ctl &
+ FSL_DDR_CS0_CS1_CS2_CS3) {
+ case FSL_DDR_CS0_CS1_CS2_CS3:
+ ctlr_density = 4 * rank_density;
+ break;
+ case FSL_DDR_CS0_CS1:
+ case FSL_DDR_CS0_CS1_AND_CS2_CS3:
+ ctlr_density = 2 * rank_density;
+ break;
+ case FSL_DDR_CS2_CS3:
+ default:
+ ctlr_density = rank_density;
+ break;
+ }
+ debug("rank density is 0x%llx, ctlr density is 0x%llx\n",
+ rank_density, ctlr_density);
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ if (pinfo->memctl_opts[i].memctl_interleaving) {
+ switch (pinfo->memctl_opts[i].memctl_interleaving_mode) {
+ case FSL_DDR_256B_INTERLEAVING:
+ case FSL_DDR_CACHE_LINE_INTERLEAVING:
+ case FSL_DDR_PAGE_INTERLEAVING:
+ case FSL_DDR_BANK_INTERLEAVING:
+ case FSL_DDR_SUPERBANK_INTERLEAVING:
+ total_ctlr_mem = 2 * ctlr_density;
+ break;
+ case FSL_DDR_3WAY_1KB_INTERLEAVING:
+ case FSL_DDR_3WAY_4KB_INTERLEAVING:
+ case FSL_DDR_3WAY_8KB_INTERLEAVING:
+ total_ctlr_mem = 3 * ctlr_density;
+ break;
+ case FSL_DDR_4WAY_1KB_INTERLEAVING:
+ case FSL_DDR_4WAY_4KB_INTERLEAVING:
+ case FSL_DDR_4WAY_8KB_INTERLEAVING:
+ total_ctlr_mem = 4 * ctlr_density;
+ break;
+ default:
+ panic("Unknown interleaving mode");
+ }
+ pinfo->common_timing_params[i].base_address =
+ current_mem_base;
+ pinfo->common_timing_params[i].total_mem =
+ total_ctlr_mem;
+ total_mem = current_mem_base + total_ctlr_mem;
+ debug("ctrl %d base 0x%llx\n", i, current_mem_base);
+ debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem);
+ } else {
+ /* when 3rd controller not interleaved */
+ current_mem_base = total_mem;
+ total_ctlr_mem = 0;
+ pinfo->common_timing_params[i].base_address =
+ current_mem_base;
+ for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
+ unsigned long long cap =
+ pinfo->dimm_params[i][j].capacity >> dbw_cap_adj[i];
+ pinfo->dimm_params[i][j].base_address =
+ current_mem_base;
+ debug("ctrl %d dimm %d base 0x%llx\n", i, j, current_mem_base);
+ current_mem_base += cap;
+ total_ctlr_mem += cap;
+ }
+ debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem);
+ pinfo->common_timing_params[i].total_mem =
+ total_ctlr_mem;
+ total_mem += total_ctlr_mem;
+ }
+ }
+ } else {
+ /*
+ * Simple linear assignment if memory
+ * controllers are not interleaved.
+ */
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ total_ctlr_mem = 0;
+ pinfo->common_timing_params[i].base_address =
+ current_mem_base;
+ for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
+ /* Compute DIMM base addresses. */
+ unsigned long long cap =
+ pinfo->dimm_params[i][j].capacity >> dbw_cap_adj[i];
+ pinfo->dimm_params[i][j].base_address =
+ current_mem_base;
+ debug("ctrl %d dimm %d base 0x%llx\n", i, j, current_mem_base);
+ current_mem_base += cap;
+ total_ctlr_mem += cap;
+ }
+ debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem);
+ pinfo->common_timing_params[i].total_mem =
+ total_ctlr_mem;
+ total_mem += total_ctlr_mem;
+ }
+ }
+ debug("Total mem by %s is 0x%llx\n", __func__, total_mem);
+
+ return total_mem;
+}
+
+/* Use weak function to allow board file to override the address assignment */
+__attribute__((weak, alias("__step_assign_addresses")))
+unsigned long long step_assign_addresses(fsl_ddr_info_t *pinfo,
+ unsigned int dbw_cap_adj[]);
+
+unsigned long long
+fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step,
+ unsigned int size_only)
+{
+ unsigned int i, j;
+ unsigned long long total_mem = 0;
+ int assert_reset;
+
+ fsl_ddr_cfg_regs_t *ddr_reg = pinfo->fsl_ddr_config_reg;
+ common_timing_params_t *timing_params = pinfo->common_timing_params;
+ assert_reset = board_need_mem_reset();
+
+ /* data bus width capacity adjust shift amount */
+ unsigned int dbw_capacity_adjust[CONFIG_NUM_DDR_CONTROLLERS];
+
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ dbw_capacity_adjust[i] = 0;
+ }
+
+ debug("starting at step %u (%s)\n",
+ start_step, step_to_string(start_step));
+
+ switch (start_step) {
+ case STEP_GET_SPD:
+#if defined(CONFIG_DDR_SPD) || defined(CONFIG_SPD_EEPROM)
+ /* STEP 1: Gather all DIMM SPD data */
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ fsl_ddr_get_spd(pinfo->spd_installed_dimms[i], i);
+ }
+
+ case STEP_COMPUTE_DIMM_PARMS:
+ /* STEP 2: Compute DIMM parameters from SPD data */
+
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
+ unsigned int retval;
+ generic_spd_eeprom_t *spd =
+ &(pinfo->spd_installed_dimms[i][j]);
+ dimm_params_t *pdimm =
+ &(pinfo->dimm_params[i][j]);
+
+ retval = compute_dimm_parameters(spd, pdimm, i);
+#ifdef CONFIG_SYS_DDR_RAW_TIMING
+ if (!i && !j && retval) {
+ printf("SPD error on controller %d! "
+ "Trying fallback to raw timing "
+ "calculation\n", i);
+ fsl_ddr_get_dimm_params(pdimm, i, j);
+ }
+#else
+ if (retval == 2) {
+ printf("Error: compute_dimm_parameters"
+ " non-zero returned FATAL value "
+ "for memctl=%u dimm=%u\n", i, j);
+ return 0;
+ }
+#endif
+ if (retval) {
+ debug("Warning: compute_dimm_parameters"
+ " non-zero return value for memctl=%u "
+ "dimm=%u\n", i, j);
+ }
+ }
+ }
+
+#elif defined(CONFIG_SYS_DDR_RAW_TIMING)
+ case STEP_COMPUTE_DIMM_PARMS:
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
+ dimm_params_t *pdimm =
+ &(pinfo->dimm_params[i][j]);
+ fsl_ddr_get_dimm_params(pdimm, i, j);
+ }
+ }
+ debug("Filling dimm parameters from board specific file\n");
+#endif
+ case STEP_COMPUTE_COMMON_PARMS:
+ /*
+ * STEP 3: Compute a common set of timing parameters
+ * suitable for all of the DIMMs on each memory controller
+ */
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ debug("Computing lowest common DIMM"
+ " parameters for memctl=%u\n", i);
+ compute_lowest_common_dimm_parameters(
+ pinfo->dimm_params[i],
+ &timing_params[i],
+ CONFIG_DIMM_SLOTS_PER_CTLR);
+ }
+
+ case STEP_GATHER_OPTS:
+ /* STEP 4: Gather configuration requirements from user */
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ debug("Reloading memory controller "
+ "configuration options for memctl=%u\n", i);
+ /*
+ * This "reloads" the memory controller options
+ * to defaults. If the user "edits" an option,
+ * next_step points to the step after this,
+ * which is currently STEP_ASSIGN_ADDRESSES.
+ */
+ populate_memctl_options(
+ timing_params[i].all_dimms_registered,
+ &pinfo->memctl_opts[i],
+ pinfo->dimm_params[i], i);
+ /*
+ * For RDIMMs, JEDEC spec requires clocks to be stable
+ * before reset signal is deasserted. For the boards
+ * using fixed parameters, this function should be
+ * be called from board init file.
+ */
+ if (timing_params[i].all_dimms_registered)
+ assert_reset = 1;
+ }
+ if (assert_reset) {
+ debug("Asserting mem reset\n");
+ board_assert_mem_reset();
+ }
+
+ case STEP_ASSIGN_ADDRESSES:
+ /* STEP 5: Assign addresses to chip selects */
+ check_interleaving_options(pinfo);
+ total_mem = step_assign_addresses(pinfo, dbw_capacity_adjust);
+ debug("Total mem %llu assigned\n", total_mem);
+
+ case STEP_COMPUTE_REGS:
+ /* STEP 6: compute controller register values */
+ debug("FSL Memory ctrl register computation\n");
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ if (timing_params[i].ndimms_present == 0) {
+ memset(&ddr_reg[i], 0,
+ sizeof(fsl_ddr_cfg_regs_t));
+ continue;
+ }
+
+ compute_fsl_memctl_config_regs(
+ &pinfo->memctl_opts[i],
+ &ddr_reg[i], &timing_params[i],
+ pinfo->dimm_params[i],
+ dbw_capacity_adjust[i],
+ size_only);
+ }
+
+ default:
+ break;
+ }
+
+ {
+ /*
+ * Compute the amount of memory available just by
+ * looking for the highest valid CSn_BNDS value.
+ * This allows us to also experiment with using
+ * only CS0 when using dual-rank DIMMs.
+ */
+ unsigned int max_end = 0;
+
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ for (j = 0; j < CONFIG_CHIP_SELECTS_PER_CTRL; j++) {
+ fsl_ddr_cfg_regs_t *reg = &ddr_reg[i];
+ if (reg->cs[j].config & 0x80000000) {
+ unsigned int end;
+ /*
+ * 0xfffffff is a special value we put
+ * for unused bnds
+ */
+ if (reg->cs[j].bnds == 0xffffffff)
+ continue;
+ end = reg->cs[j].bnds & 0xffff;
+ if (end > max_end) {
+ max_end = end;
+ }
+ }
+ }
+ }
+
+ total_mem = 1 + (((unsigned long long)max_end << 24ULL) |
+ 0xFFFFFFULL) - CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY;
+ }
+
+ return total_mem;
+}
+
+/*
+ * fsl_ddr_sdram() -- this is the main function to be called by
+ * initdram() in the board file.
+ *
+ * It returns amount of memory configured in bytes.
+ */
+phys_size_t fsl_ddr_sdram(void)
+{
+ unsigned int i;
+#ifdef CONFIG_PPC
+ unsigned int law_memctl = LAW_TRGT_IF_DDR_1;
+#endif
+ unsigned long long total_memory;
+ fsl_ddr_info_t info;
+ int deassert_reset;
+
+ /* Reset info structure. */
+ memset(&info, 0, sizeof(fsl_ddr_info_t));
+
+ /* Compute it once normally. */
+#ifdef CONFIG_FSL_DDR_INTERACTIVE
+ if (tstc() && (getc() == 'd')) { /* we got a key press of 'd' */
+ total_memory = fsl_ddr_interactive(&info, 0);
+ } else if (fsl_ddr_interactive_env_var_exists()) {
+ total_memory = fsl_ddr_interactive(&info, 1);
+ } else
+#endif
+ total_memory = fsl_ddr_compute(&info, STEP_GET_SPD, 0);
+
+ /* setup 3-way interleaving before enabling DDRC */
+ if (info.memctl_opts[0].memctl_interleaving) {
+ switch (info.memctl_opts[0].memctl_interleaving_mode) {
+ case FSL_DDR_3WAY_1KB_INTERLEAVING:
+ case FSL_DDR_3WAY_4KB_INTERLEAVING:
+ case FSL_DDR_3WAY_8KB_INTERLEAVING:
+ fsl_ddr_set_intl3r(
+ info.memctl_opts[0].memctl_interleaving_mode);
+ break;
+ default:
+ break;
+ }
+ }
+
+ /*
+ * Program configuration registers.
+ * JEDEC specs requires clocks to be stable before deasserting reset
+ * for RDIMMs. Clocks start after chip select is enabled and clock
+ * control register is set. During step 1, all controllers have their
+ * registers set but not enabled. Step 2 proceeds after deasserting
+ * reset through board FPGA or GPIO.
+ * For non-registered DIMMs, initialization can go through but it is
+ * also OK to follow the same flow.
+ */
+ deassert_reset = board_need_mem_reset();
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ if (info.common_timing_params[i].all_dimms_registered)
+ deassert_reset = 1;
+ }
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ debug("Programming controller %u\n", i);
+ if (info.common_timing_params[i].ndimms_present == 0) {
+ debug("No dimms present on controller %u; "
+ "skipping programming\n", i);
+ continue;
+ }
+ /*
+ * The following call with step = 1 returns before enabling
+ * the controller. It has to finish with step = 2 later.
+ */
+ fsl_ddr_set_memctl_regs(&(info.fsl_ddr_config_reg[i]), i,
+ deassert_reset ? 1 : 0);
+ }
+ if (deassert_reset) {
+ /* Use board FPGA or GPIO to deassert reset signal */
+ debug("Deasserting mem reset\n");
+ board_deassert_mem_reset();
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ /* Call with step = 2 to continue initialization */
+ fsl_ddr_set_memctl_regs(&(info.fsl_ddr_config_reg[i]),
+ i, 2);
+ }
+ }
+
+#ifdef CONFIG_PPC
+ /* program LAWs */
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ if (info.memctl_opts[i].memctl_interleaving) {
+ switch (info.memctl_opts[i].memctl_interleaving_mode) {
+ case FSL_DDR_CACHE_LINE_INTERLEAVING:
+ case FSL_DDR_PAGE_INTERLEAVING:
+ case FSL_DDR_BANK_INTERLEAVING:
+ case FSL_DDR_SUPERBANK_INTERLEAVING:
+ if (i == 0) {
+ law_memctl = LAW_TRGT_IF_DDR_INTRLV;
+ fsl_ddr_set_lawbar(&info.common_timing_params[i],
+ law_memctl, i);
+ } else if (i == 2) {
+ law_memctl = LAW_TRGT_IF_DDR_INTLV_34;
+ fsl_ddr_set_lawbar(&info.common_timing_params[i],
+ law_memctl, i);
+ }
+ break;
+ case FSL_DDR_3WAY_1KB_INTERLEAVING:
+ case FSL_DDR_3WAY_4KB_INTERLEAVING:
+ case FSL_DDR_3WAY_8KB_INTERLEAVING:
+ law_memctl = LAW_TRGT_IF_DDR_INTLV_123;
+ if (i == 0) {
+ fsl_ddr_set_lawbar(&info.common_timing_params[i],
+ law_memctl, i);
+ }
+ break;
+ case FSL_DDR_4WAY_1KB_INTERLEAVING:
+ case FSL_DDR_4WAY_4KB_INTERLEAVING:
+ case FSL_DDR_4WAY_8KB_INTERLEAVING:
+ law_memctl = LAW_TRGT_IF_DDR_INTLV_1234;
+ if (i == 0)
+ fsl_ddr_set_lawbar(&info.common_timing_params[i],
+ law_memctl, i);
+ /* place holder for future 4-way interleaving */
+ break;
+ default:
+ break;
+ }
+ } else {
+ switch (i) {
+ case 0:
+ law_memctl = LAW_TRGT_IF_DDR_1;
+ break;
+ case 1:
+ law_memctl = LAW_TRGT_IF_DDR_2;
+ break;
+ case 2:
+ law_memctl = LAW_TRGT_IF_DDR_3;
+ break;
+ case 3:
+ law_memctl = LAW_TRGT_IF_DDR_4;
+ break;
+ default:
+ break;
+ }
+ fsl_ddr_set_lawbar(&info.common_timing_params[i],
+ law_memctl, i);
+ }
+ }
+#endif
+
+ debug("total_memory by %s = %llu\n", __func__, total_memory);
+
+#if !defined(CONFIG_PHYS_64BIT)
+ /* Check for 4G or more. Bad. */
+ if (total_memory >= (1ull << 32)) {
+ puts("Detected ");
+ print_size(total_memory, " of memory\n");
+ printf(" This U-Boot only supports < 4G of DDR\n");
+ printf(" You could rebuild it with CONFIG_PHYS_64BIT\n");
+ printf(" "); /* re-align to match init_func_ram print */
+ total_memory = CONFIG_MAX_MEM_MAPPED;
+ }
+#endif
+
+ return total_memory;
+}
+
+/*
+ * fsl_ddr_sdram_size() - This function only returns the size of the total
+ * memory without setting ddr control registers.
+ */
+phys_size_t
+fsl_ddr_sdram_size(void)
+{
+ fsl_ddr_info_t info;
+ unsigned long long total_memory = 0;
+
+ memset(&info, 0 , sizeof(fsl_ddr_info_t));
+
+ /* Compute it once normally. */
+ total_memory = fsl_ddr_compute(&info, STEP_GET_SPD, 1);
+
+ return total_memory;
+}
Code Review / kvmfornfv.git / blobdiff