--- /dev/null
+/*
+ * cpu/ppc4xx/denali_spd_ddr2.c
+ * This SPD SDRAM detection code supports AMCC PPC44x CPUs with a Denali-core
+ * DDR2 controller, specifically the 440EPx/GRx.
+ *
+ * (C) Copyright 2007
+ * Larry Johnson, lrj@acm.org.
+ *
+ * Based primarily on cpu/ppc4xx/4xx_spd_ddr2.c, which is...
+ *
+ * (C) Copyright 2007
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * COPYRIGHT AMCC CORPORATION 2004
+ *
+ * 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
+ *
+ */
+
+/* define DEBUG for debugging output (obviously ;-)) */
+#if 0
+#define DEBUG
+#endif
+
+#include <common.h>
+#include <command.h>
+#include <ppc4xx.h>
+#include <i2c.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/mmu.h>
+
+#if defined(CONFIG_SPD_EEPROM) && \
+ (defined(CONFIG_440EPX) || defined(CONFIG_440GRX))
+
+/*-----------------------------------------------------------------------------+
+ * Defines
+ *-----------------------------------------------------------------------------*/
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+#define MAXDIMMS 2
+#define MAXRANKS 2
+
+#define ONE_BILLION 1000000000
+
+#define MULDIV64(m1, m2, d) (u32)(((u64)(m1) * (u64)(m2)) / (u64)(d))
+
+#define DLL_DQS_DELAY 0x19
+#define DLL_DQS_BYPASS 0x0B
+#define DQS_OUT_SHIFT 0x7F
+
+/*
+ * This DDR2 setup code can dynamically setup the TLB entries for the DDR2 memory
+ * region. Right now the cache should still be disabled in U-Boot because of the
+ * EMAC driver, that need it's buffer descriptor to be located in non cached
+ * memory.
+ *
+ * If at some time this restriction doesn't apply anymore, just define
+ * CFG_ENABLE_SDRAM_CACHE in the board config file and this code should setup
+ * everything correctly.
+ */
+#if defined(CFG_ENABLE_SDRAM_CACHE)
+#define MY_TLB_WORD2_I_ENABLE 0 /* enable caching on SDRAM */
+#else
+#define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE /* disable caching on SDRAM */
+#endif
+
+/*-----------------------------------------------------------------------------+
+ * Prototypes
+ *-----------------------------------------------------------------------------*/
+extern int denali_wait_for_dlllock(void);
+extern void denali_core_search_data_eye(void);
+extern void dcbz_area(u32 start_address, u32 num_bytes);
+extern void dflush(void);
+
+/*
+ * Board-specific Platform code can reimplement spd_ddr_init_hang () if needed
+ */
+void __spd_ddr_init_hang(void)
+{
+ hang();
+}
+void spd_ddr_init_hang(void)
+ __attribute__ ((weak, alias("__spd_ddr_init_hang")));
+
+#if defined(DEBUG)
+static void print_mcsr(void)
+{
+ printf("MCSR = 0x%08X\n", mfspr(SPRN_MCSR));
+}
+
+static void denali_sdram_register_dump(void)
+{
+ unsigned int sdram_data;
+
+ printf("\n Register Dump:\n");
+ mfsdram(DDR0_00, sdram_data);
+ printf(" DDR0_00 = 0x%08X", sdram_data);
+ mfsdram(DDR0_01, sdram_data);
+ printf(" DDR0_01 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_02, sdram_data);
+ printf(" DDR0_02 = 0x%08X", sdram_data);
+ mfsdram(DDR0_03, sdram_data);
+ printf(" DDR0_03 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_04, sdram_data);
+ printf(" DDR0_04 = 0x%08X", sdram_data);
+ mfsdram(DDR0_05, sdram_data);
+ printf(" DDR0_05 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_06, sdram_data);
+ printf(" DDR0_06 = 0x%08X", sdram_data);
+ mfsdram(DDR0_07, sdram_data);
+ printf(" DDR0_07 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_08, sdram_data);
+ printf(" DDR0_08 = 0x%08X", sdram_data);
+ mfsdram(DDR0_09, sdram_data);
+ printf(" DDR0_09 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_10, sdram_data);
+ printf(" DDR0_10 = 0x%08X", sdram_data);
+ mfsdram(DDR0_11, sdram_data);
+ printf(" DDR0_11 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_12, sdram_data);
+ printf(" DDR0_12 = 0x%08X", sdram_data);
+ mfsdram(DDR0_14, sdram_data);
+ printf(" DDR0_14 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_17, sdram_data);
+ printf(" DDR0_17 = 0x%08X", sdram_data);
+ mfsdram(DDR0_18, sdram_data);
+ printf(" DDR0_18 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_19, sdram_data);
+ printf(" DDR0_19 = 0x%08X", sdram_data);
+ mfsdram(DDR0_20, sdram_data);
+ printf(" DDR0_20 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_21, sdram_data);
+ printf(" DDR0_21 = 0x%08X", sdram_data);
+ mfsdram(DDR0_22, sdram_data);
+ printf(" DDR0_22 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_23, sdram_data);
+ printf(" DDR0_23 = 0x%08X", sdram_data);
+ mfsdram(DDR0_24, sdram_data);
+ printf(" DDR0_24 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_25, sdram_data);
+ printf(" DDR0_25 = 0x%08X", sdram_data);
+ mfsdram(DDR0_26, sdram_data);
+ printf(" DDR0_26 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_27, sdram_data);
+ printf(" DDR0_27 = 0x%08X", sdram_data);
+ mfsdram(DDR0_28, sdram_data);
+ printf(" DDR0_28 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_31, sdram_data);
+ printf(" DDR0_31 = 0x%08X", sdram_data);
+ mfsdram(DDR0_32, sdram_data);
+ printf(" DDR0_32 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_33, sdram_data);
+ printf(" DDR0_33 = 0x%08X", sdram_data);
+ mfsdram(DDR0_34, sdram_data);
+ printf(" DDR0_34 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_35, sdram_data);
+ printf(" DDR0_35 = 0x%08X", sdram_data);
+ mfsdram(DDR0_36, sdram_data);
+ printf(" DDR0_36 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_37, sdram_data);
+ printf(" DDR0_37 = 0x%08X", sdram_data);
+ mfsdram(DDR0_38, sdram_data);
+ printf(" DDR0_38 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_39, sdram_data);
+ printf(" DDR0_39 = 0x%08X", sdram_data);
+ mfsdram(DDR0_40, sdram_data);
+ printf(" DDR0_40 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_41, sdram_data);
+ printf(" DDR0_41 = 0x%08X", sdram_data);
+ mfsdram(DDR0_42, sdram_data);
+ printf(" DDR0_42 = 0x%08X\n", sdram_data);
+ mfsdram(DDR0_43, sdram_data);
+ printf(" DDR0_43 = 0x%08X", sdram_data);
+ mfsdram(DDR0_44, sdram_data);
+ printf(" DDR0_44 = 0x%08X\n", sdram_data);
+}
+#else
+static inline void denali_sdram_register_dump(void)
+{
+}
+
+inline static void print_mcsr(void)
+{
+}
+#endif /* defined(DEBUG) */
+
+static int is_ecc_enabled(void)
+{
+ u32 val;
+
+ mfsdram(DDR0_22, val);
+ return 0x3 == DDR0_22_CTRL_RAW_DECODE(val);
+}
+
+static unsigned char spd_read(u8 chip, unsigned int addr)
+{
+ u8 data[2];
+
+ if (0 != i2c_probe(chip) || 0 != i2c_read(chip, addr, 1, data, 1)) {
+ debug("spd_read(0x%02X, 0x%02X) failed\n", chip, addr);
+ return 0;
+ }
+ debug("spd_read(0x%02X, 0x%02X) returned 0x%02X\n",
+ chip, addr, data[0]);
+ return data[0];
+}
+
+static unsigned long get_tcyc(unsigned char reg)
+{
+ /*
+ * Byte 9, et al: Cycle time for CAS Latency=X, is split into two
+ * nibbles: the higher order nibble (bits 4-7) designates the cycle time
+ * to a granularity of 1ns; the value presented by the lower order
+ * nibble (bits 0-3) has a granularity of .1ns and is added to the value
+ * designated by the higher nibble. In addition, four lines of the lower
+ * order nibble are assigned to support +.25, +.33, +.66, and +.75.
+ */
+
+ unsigned char subfield_b = reg & 0x0F;
+
+ switch (subfield_b & 0x0F) {
+ case 0x0:
+ case 0x1:
+ case 0x2:
+ case 0x3:
+ case 0x4:
+ case 0x5:
+ case 0x6:
+ case 0x7:
+ case 0x8:
+ case 0x9:
+ return 1000 * (reg >> 4) + 100 * subfield_b;
+ case 0xA:
+ return 1000 * (reg >> 4) + 250;
+ case 0xB:
+ return 1000 * (reg >> 4) + 333;
+ case 0xC:
+ return 1000 * (reg >> 4) + 667;
+ case 0xD:
+ return 1000 * (reg >> 4) + 750;
+ }
+ return 0;
+}
+
+/*------------------------------------------------------------------
+ * Find the installed DIMMs, make sure that the are DDR2, and fill
+ * in the dimm_ranks array. Then dimm_ranks[dimm_num] > 0 iff the
+ * DIMM and dimm_num is present.
+ * Note: Because there are only two chip-select lines, it is assumed
+ * that a board with a single socket can support two ranks on that
+ * socket, while a board with two sockets can support only one rank
+ * on each socket.
+ *-----------------------------------------------------------------*/
+static void get_spd_info(unsigned long dimm_ranks[],
+ unsigned long *ranks,
+ unsigned char const iic0_dimm_addr[],
+ unsigned long num_dimm_banks)
+{
+ unsigned long dimm_num;
+ unsigned long dimm_found = FALSE;
+ unsigned long const max_ranks_per_dimm = (1 == num_dimm_banks) ? 2 : 1;
+ unsigned char num_of_bytes;
+ unsigned char total_size;
+
+ *ranks = 0;
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ num_of_bytes = 0;
+ total_size = 0;
+
+ num_of_bytes = spd_read(iic0_dimm_addr[dimm_num], 0);
+ total_size = spd_read(iic0_dimm_addr[dimm_num], 1);
+ if ((num_of_bytes != 0) && (total_size != 0)) {
+ unsigned char const dimm_type =
+ spd_read(iic0_dimm_addr[dimm_num], 2);
+
+ unsigned long ranks_on_dimm =
+ (spd_read(iic0_dimm_addr[dimm_num], 5) & 0x07) + 1;
+
+ if (8 != dimm_type) {
+ switch (dimm_type) {
+ case 1:
+ printf("ERROR: Standard Fast Page Mode "
+ "DRAM DIMM");
+ break;
+ case 2:
+ printf("ERROR: EDO DIMM");
+ break;
+ case 3:
+ printf("ERROR: Pipelined Nibble DIMM");
+ break;
+ case 4:
+ printf("ERROR: SDRAM DIMM");
+ break;
+ case 5:
+ printf("ERROR: Multiplexed ROM DIMM");
+ break;
+ case 6:
+ printf("ERROR: SGRAM DIMM");
+ break;
+ case 7:
+ printf("ERROR: DDR1 DIMM");
+ break;
+ default:
+ printf("ERROR: Unknown DIMM (type %d)",
+ (unsigned int)dimm_type);
+ break;
+ }
+ printf(" detected in slot %lu.\n", dimm_num);
+ printf("Only DDR2 SDRAM DIMMs are supported."
+ "\n");
+ printf("Replace the module with a DDR2 DIMM."
+ "\n\n");
+ spd_ddr_init_hang();
+ }
+ dimm_found = TRUE;
+ debug("DIMM slot %lu: populated with %lu-rank DDR2 DIMM"
+ "\n", dimm_num, ranks_on_dimm);
+ if (ranks_on_dimm > max_ranks_per_dimm) {
+ printf("WARNING: DRAM DIMM in slot %lu has %lu "
+ "ranks.\n");
+ if (1 == max_ranks_per_dimm) {
+ printf("Only one rank will be used.\n");
+ } else {
+ printf
+ ("Only two ranks will be used.\n");
+ }
+ ranks_on_dimm = max_ranks_per_dimm;
+ }
+ dimm_ranks[dimm_num] = ranks_on_dimm;
+ *ranks += ranks_on_dimm;
+ } else {
+ dimm_ranks[dimm_num] = 0;
+ debug("DIMM slot %lu: Not populated\n", dimm_num);
+ }
+ }
+ if (dimm_found == FALSE) {
+ printf("ERROR: No memory installed.\n");
+ printf("Install at least one DDR2 DIMM.\n\n");
+ spd_ddr_init_hang();
+ }
+ debug("Total number of ranks = %d\n", *ranks);
+}
+
+/*------------------------------------------------------------------
+ * For the memory DIMMs installed, this routine verifies that
+ * frequency previously calculated is supported.
+ *-----------------------------------------------------------------*/
+static void check_frequency(unsigned long *dimm_ranks,
+ unsigned char const iic0_dimm_addr[],
+ unsigned long num_dimm_banks,
+ unsigned long sdram_freq)
+{
+ unsigned long dimm_num;
+ unsigned long cycle_time;
+ unsigned long calc_cycle_time;
+
+ /*
+ * calc_cycle_time is calculated from DDR frequency set by board/chip
+ * and is expressed in picoseconds to match the way DIMM cycle time is
+ * calculated below.
+ */
+ calc_cycle_time = MULDIV64(ONE_BILLION, 1000, sdram_freq);
+
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ if (dimm_ranks[dimm_num]) {
+ cycle_time =
+ get_tcyc(spd_read(iic0_dimm_addr[dimm_num], 9));
+ debug("cycle_time=%d ps\n", cycle_time);
+
+ if (cycle_time > (calc_cycle_time + 10)) {
+ /*
+ * the provided sdram cycle_time is too small
+ * for the available DIMM cycle_time. The
+ * additionnal 10ps is here to accept a small
+ * incertainty.
+ */
+ printf
+ ("ERROR: DRAM DIMM detected with cycle_time %d ps in "
+ "slot %d \n while calculated cycle time is %d ps.\n",
+ (unsigned int)cycle_time,
+ (unsigned int)dimm_num,
+ (unsigned int)calc_cycle_time);
+ printf
+ ("Replace the DIMM, or change DDR frequency via "
+ "strapping bits.\n\n");
+ spd_ddr_init_hang();
+ }
+ }
+ }
+}
+
+/*------------------------------------------------------------------
+ * This routine gets size information for the installed memory
+ * DIMMs.
+ *-----------------------------------------------------------------*/
+static void get_dimm_size(unsigned long dimm_ranks[],
+ unsigned char const iic0_dimm_addr[],
+ unsigned long num_dimm_banks,
+ unsigned long *const rows,
+ unsigned long *const banks,
+ unsigned long *const cols, unsigned long *const width)
+{
+ unsigned long dimm_num;
+
+ *rows = 0;
+ *banks = 0;
+ *cols = 0;
+ *width = 0;
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ if (dimm_ranks[dimm_num]) {
+ unsigned long t;
+
+ /* Rows */
+ t = spd_read(iic0_dimm_addr[dimm_num], 3);
+ if (0 == *rows) {
+ *rows = t;
+ } else if (t != *rows) {
+ printf("ERROR: DRAM DIMM modules do not all "
+ "have the same number of rows.\n\n");
+ spd_ddr_init_hang();
+ }
+ /* Banks */
+ t = spd_read(iic0_dimm_addr[dimm_num], 17);
+ if (0 == *banks) {
+ *banks = t;
+ } else if (t != *banks) {
+ printf("ERROR: DRAM DIMM modules do not all "
+ "have the same number of banks.\n\n");
+ spd_ddr_init_hang();
+ }
+ /* Columns */
+ t = spd_read(iic0_dimm_addr[dimm_num], 4);
+ if (0 == *cols) {
+ *cols = t;
+ } else if (t != *cols) {
+ printf("ERROR: DRAM DIMM modules do not all "
+ "have the same number of columns.\n\n");
+ spd_ddr_init_hang();
+ }
+ /* Data width */
+ t = spd_read(iic0_dimm_addr[dimm_num], 6);
+ if (0 == *width) {
+ *width = t;
+ } else if (t != *width) {
+ printf("ERROR: DRAM DIMM modules do not all "
+ "have the same data width.\n\n");
+ spd_ddr_init_hang();
+ }
+ }
+ }
+ debug("Number of rows = %d\n", *rows);
+ debug("Number of columns = %d\n", *cols);
+ debug("Number of banks = %d\n", *banks);
+ debug("Data width = %d\n", *width);
+ if (*rows > 14) {
+ printf("ERROR: DRAM DIMM modules have %lu address rows.\n",
+ *rows);
+ printf("Only modules with 14 or fewer rows are supported.\n\n");
+ spd_ddr_init_hang();
+ }
+ if (4 != *banks && 8 != *banks) {
+ printf("ERROR: DRAM DIMM modules have %lu banks.\n", *banks);
+ printf("Only modules with 4 or 8 banks are supported.\n\n");
+ spd_ddr_init_hang();
+ }
+ if (*cols > 12) {
+ printf("ERROR: DRAM DIMM modules have %lu address columns.\n",
+ *cols);
+ printf("Only modules with 12 or fewer columns are "
+ "supported.\n\n");
+ spd_ddr_init_hang();
+ }
+ if (32 != *width && 40 != *width && 64 != *width && 72 != *width) {
+ printf("ERROR: DRAM DIMM modules have a width of %lu bit.\n",
+ *width);
+ printf("Only modules with widths of 32, 40, 64, and 72 bits "
+ "are supported.\n\n");
+ spd_ddr_init_hang();
+ }
+}
+
+/*------------------------------------------------------------------
+ * Only 1.8V modules are supported. This routine verifies this.
+ *-----------------------------------------------------------------*/
+static void check_voltage_type(unsigned long dimm_ranks[],
+ unsigned char const iic0_dimm_addr[],
+ unsigned long num_dimm_banks)
+{
+ unsigned long dimm_num;
+ unsigned long voltage_type;
+
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ if (dimm_ranks[dimm_num]) {
+ voltage_type = spd_read(iic0_dimm_addr[dimm_num], 8);
+ if (0x05 != voltage_type) { /* 1.8V for DDR2 */
+ printf("ERROR: Slot %lu provides 1.8V for DDR2 "
+ "DIMMs.\n", dimm_num);
+ switch (voltage_type) {
+ case 0x00:
+ printf("This DIMM is 5.0 Volt/TTL.\n");
+ break;
+ case 0x01:
+ printf("This DIMM is LVTTL.\n");
+ break;
+ case 0x02:
+ printf("This DIMM is 1.5 Volt.\n");
+ break;
+ case 0x03:
+ printf("This DIMM is 3.3 Volt/TTL.\n");
+ break;
+ case 0x04:
+ printf("This DIMM is 2.5 Volt.\n");
+ break;
+ default:
+ printf("This DIMM is an unknown "
+ "voltage.\n");
+ break;
+ }
+ printf("Replace it with a 1.8V DDR2 DIMM.\n\n");
+ spd_ddr_init_hang();
+ }
+ }
+ }
+}
+
+static void program_ddr0_03(unsigned long dimm_ranks[],
+ unsigned char const iic0_dimm_addr[],
+ unsigned long num_dimm_banks,
+ unsigned long sdram_freq,
+ unsigned long rows, unsigned long *cas_latency)
+{
+ unsigned long dimm_num;
+ unsigned long cas_index;
+ unsigned long cycle_2_0_clk;
+ unsigned long cycle_3_0_clk;
+ unsigned long cycle_4_0_clk;
+ unsigned long cycle_5_0_clk;
+ unsigned long max_2_0_tcyc_ps = 100;
+ unsigned long max_3_0_tcyc_ps = 100;
+ unsigned long max_4_0_tcyc_ps = 100;
+ unsigned long max_5_0_tcyc_ps = 100;
+ unsigned char cas_available = 0x3C; /* value for DDR2 */
+ u32 ddr0_03 = DDR0_03_BSTLEN_ENCODE(0x2) | DDR0_03_INITAREF_ENCODE(0x2);
+ unsigned int const tcyc_addr[3] = { 9, 23, 25 };
+
+ /*------------------------------------------------------------------
+ * Get the board configuration info.
+ *-----------------------------------------------------------------*/
+ debug("sdram_freq = %d\n", sdram_freq);
+
+ /*------------------------------------------------------------------
+ * Handle the timing. We need to find the worst case timing of all
+ * the dimm modules installed.
+ *-----------------------------------------------------------------*/
+ /* loop through all the DIMM slots on the board */
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ /* If a dimm is installed in a particular slot ... */
+ if (dimm_ranks[dimm_num]) {
+ unsigned char const cas_bit =
+ spd_read(iic0_dimm_addr[dimm_num], 18);
+ unsigned char cas_mask;
+
+ cas_available &= cas_bit;
+ for (cas_mask = 0x80; cas_mask; cas_mask >>= 1) {
+ if (cas_bit & cas_mask)
+ break;
+ }
+ debug("cas_bit (SPD byte 18) = %02X, cas_mask = %02X\n",
+ cas_bit, cas_mask);
+
+ for (cas_index = 0; cas_index < 3;
+ cas_mask >>= 1, cas_index++) {
+ unsigned long cycle_time_ps;
+
+ if (!(cas_available & cas_mask)) {
+ continue;
+ }
+ cycle_time_ps =
+ get_tcyc(spd_read(iic0_dimm_addr[dimm_num],
+ tcyc_addr[cas_index]));
+
+ debug("cas_index = %d: cycle_time_ps = %d\n",
+ cas_index, cycle_time_ps);
+ /*
+ * DDR2 devices use the following bitmask for CAS latency:
+ * Bit 7 6 5 4 3 2 1 0
+ * TBD 6.0 5.0 4.0 3.0 2.0 TBD TBD
+ */
+ switch (cas_mask) {
+ case 0x20:
+ max_5_0_tcyc_ps =
+ max(max_5_0_tcyc_ps, cycle_time_ps);
+ break;
+ case 0x10:
+ max_4_0_tcyc_ps =
+ max(max_4_0_tcyc_ps, cycle_time_ps);
+ break;
+ case 0x08:
+ max_3_0_tcyc_ps =
+ max(max_3_0_tcyc_ps, cycle_time_ps);
+ break;
+ case 0x04:
+ max_2_0_tcyc_ps =
+ max(max_2_0_tcyc_ps, cycle_time_ps);
+ break;
+ }
+ }
+ }
+ }
+ debug("cas_available (bit map) = 0x%02X\n", cas_available);
+
+ /*------------------------------------------------------------------
+ * Set the SDRAM mode, SDRAM_MMODE
+ *-----------------------------------------------------------------*/
+
+ /* add 10 here because of rounding problems */
+ cycle_2_0_clk = MULDIV64(ONE_BILLION, 1000, max_2_0_tcyc_ps) + 10;
+ cycle_3_0_clk = MULDIV64(ONE_BILLION, 1000, max_3_0_tcyc_ps) + 10;
+ cycle_4_0_clk = MULDIV64(ONE_BILLION, 1000, max_4_0_tcyc_ps) + 10;
+ cycle_5_0_clk = MULDIV64(ONE_BILLION, 1000, max_5_0_tcyc_ps) + 10;
+ debug("cycle_2_0_clk = %d\n", cycle_2_0_clk);
+ debug("cycle_3_0_clk = %d\n", cycle_3_0_clk);
+ debug("cycle_4_0_clk = %d\n", cycle_4_0_clk);
+ debug("cycle_5_0_clk = %d\n", cycle_5_0_clk);
+
+ if ((cas_available & 0x04) && (sdram_freq <= cycle_2_0_clk)) {
+ *cas_latency = 2;
+ ddr0_03 |= DDR0_03_CASLAT_ENCODE(0x2) |
+ DDR0_03_CASLAT_LIN_ENCODE(0x4);
+ } else if ((cas_available & 0x08) && (sdram_freq <= cycle_3_0_clk)) {
+ *cas_latency = 3;
+ ddr0_03 |= DDR0_03_CASLAT_ENCODE(0x3) |
+ DDR0_03_CASLAT_LIN_ENCODE(0x6);
+ } else if ((cas_available & 0x10) && (sdram_freq <= cycle_4_0_clk)) {
+ *cas_latency = 4;
+ ddr0_03 |= DDR0_03_CASLAT_ENCODE(0x4) |
+ DDR0_03_CASLAT_LIN_ENCODE(0x8);
+ } else if ((cas_available & 0x20) && (sdram_freq <= cycle_5_0_clk)) {
+ *cas_latency = 5;
+ ddr0_03 |= DDR0_03_CASLAT_ENCODE(0x5) |
+ DDR0_03_CASLAT_LIN_ENCODE(0xA);
+ } else {
+ printf("ERROR: Cannot find a supported CAS latency with the "
+ "installed DIMMs.\n");
+ printf("Only DDR2 DIMMs with CAS latencies of 2.0, 3.0, 4.0, "
+ "and 5.0 are supported.\n");
+ printf("Make sure the PLB speed is within the supported range "
+ "of the DIMMs.\n");
+ printf("sdram_freq=%d cycle2=%d cycle3=%d cycle4=%d "
+ "cycle5=%d\n\n", sdram_freq, cycle_2_0_clk,
+ cycle_3_0_clk, cycle_4_0_clk, cycle_5_0_clk);
+ spd_ddr_init_hang();
+ }
+ debug("CAS latency = %d\n", *cas_latency);
+ mtsdram(DDR0_03, ddr0_03);
+}
+
+static void program_ddr0_04(unsigned long dimm_ranks[],
+ unsigned char const iic0_dimm_addr[],
+ unsigned long num_dimm_banks,
+ unsigned long sdram_freq)
+{
+ unsigned long dimm_num;
+ unsigned long t_rc_ps = 0;
+ unsigned long t_rrd_ps = 0;
+ unsigned long t_rtp_ps = 0;
+ unsigned long t_rc_clk;
+ unsigned long t_rrd_clk;
+ unsigned long t_rtp_clk;
+
+ /*------------------------------------------------------------------
+ * Handle the timing. We need to find the worst case timing of all
+ * the dimm modules installed.
+ *-----------------------------------------------------------------*/
+ /* loop through all the DIMM slots on the board */
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ /* If a dimm is installed in a particular slot ... */
+ if (dimm_ranks[dimm_num]) {
+ unsigned long ps;
+
+ /* tRC */
+ ps = 1000 * spd_read(iic0_dimm_addr[dimm_num], 41);
+ switch (spd_read(iic0_dimm_addr[dimm_num], 40) >> 4) {
+ case 0x1:
+ ps += 250;
+ break;
+ case 0x2:
+ ps += 333;
+ break;
+ case 0x3:
+ ps += 500;
+ break;
+ case 0x4:
+ ps += 667;
+ break;
+ case 0x5:
+ ps += 750;
+ break;
+ }
+ t_rc_ps = max(t_rc_ps, ps);
+ /* tRRD */
+ ps = 250 * spd_read(iic0_dimm_addr[dimm_num], 28);
+ t_rrd_ps = max(t_rrd_ps, ps);
+ /* tRTP */
+ ps = 250 * spd_read(iic0_dimm_addr[dimm_num], 38);
+ t_rtp_ps = max(t_rtp_ps, ps);
+ }
+ }
+ debug("t_rc_ps = %d\n", t_rc_ps);
+ t_rc_clk = (MULDIV64(sdram_freq, t_rc_ps, ONE_BILLION) + 999) / 1000;
+ debug("t_rrd_ps = %d\n", t_rrd_ps);
+ t_rrd_clk = (MULDIV64(sdram_freq, t_rrd_ps, ONE_BILLION) + 999) / 1000;
+ debug("t_rtp_ps = %d\n", t_rtp_ps);
+ t_rtp_clk = (MULDIV64(sdram_freq, t_rtp_ps, ONE_BILLION) + 999) / 1000;
+ mtsdram(DDR0_04, DDR0_04_TRC_ENCODE(t_rc_clk) |
+ DDR0_04_TRRD_ENCODE(t_rrd_clk) |
+ DDR0_04_TRTP_ENCODE(t_rtp_clk));
+}
+
+static void program_ddr0_05(unsigned long dimm_ranks[],
+ unsigned char const iic0_dimm_addr[],
+ unsigned long num_dimm_banks,
+ unsigned long sdram_freq)
+{
+ unsigned long dimm_num;
+ unsigned long t_rp_ps = 0;
+ unsigned long t_ras_ps = 0;
+ unsigned long t_rp_clk;
+ unsigned long t_ras_clk;
+ u32 ddr0_05 = DDR0_05_TMRD_ENCODE(0x2) | DDR0_05_TEMRS_ENCODE(0x2);
+
+ /*------------------------------------------------------------------
+ * Handle the timing. We need to find the worst case timing of all
+ * the dimm modules installed.
+ *-----------------------------------------------------------------*/
+ /* loop through all the DIMM slots on the board */
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ /* If a dimm is installed in a particular slot ... */
+ if (dimm_ranks[dimm_num]) {
+ unsigned long ps;
+
+ /* tRP */
+ ps = 250 * spd_read(iic0_dimm_addr[dimm_num], 27);
+ t_rp_ps = max(t_rp_ps, ps);
+ /* tRAS */
+ ps = 1000 * spd_read(iic0_dimm_addr[dimm_num], 30);
+ t_ras_ps = max(t_ras_ps, ps);
+ }
+ }
+ debug("t_rp_ps = %d\n", t_rp_ps);
+ t_rp_clk = (MULDIV64(sdram_freq, t_rp_ps, ONE_BILLION) + 999) / 1000;
+ debug("t_ras_ps = %d\n", t_ras_ps);
+ t_ras_clk = (MULDIV64(sdram_freq, t_ras_ps, ONE_BILLION) + 999) / 1000;
+ mtsdram(DDR0_05, ddr0_05 | DDR0_05_TRP_ENCODE(t_rp_clk) |
+ DDR0_05_TRAS_MIN_ENCODE(t_ras_clk));
+}
+
+static void program_ddr0_06(unsigned long dimm_ranks[],
+ unsigned char const iic0_dimm_addr[],
+ unsigned long num_dimm_banks,
+ unsigned long sdram_freq)
+{
+ unsigned long dimm_num;
+ unsigned char spd_40;
+ unsigned long t_wtr_ps = 0;
+ unsigned long t_rfc_ps = 0;
+ unsigned long t_wtr_clk;
+ unsigned long t_rfc_clk;
+ u32 ddr0_06 =
+ DDR0_06_WRITEINTERP_ENCODE(0x1) | DDR0_06_TDLL_ENCODE(200);
+
+ /*------------------------------------------------------------------
+ * Handle the timing. We need to find the worst case timing of all
+ * the dimm modules installed.
+ *-----------------------------------------------------------------*/
+ /* loop through all the DIMM slots on the board */
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ /* If a dimm is installed in a particular slot ... */
+ if (dimm_ranks[dimm_num]) {
+ unsigned long ps;
+
+ /* tWTR */
+ ps = 250 * spd_read(iic0_dimm_addr[dimm_num], 37);
+ t_wtr_ps = max(t_wtr_ps, ps);
+ /* tRFC */
+ ps = 1000 * spd_read(iic0_dimm_addr[dimm_num], 42);
+ spd_40 = spd_read(iic0_dimm_addr[dimm_num], 40);
+ ps += 256000 * (spd_40 & 0x01);
+ switch ((spd_40 & 0x0E) >> 1) {
+ case 0x1:
+ ps += 250;
+ break;
+ case 0x2:
+ ps += 333;
+ break;
+ case 0x3:
+ ps += 500;
+ break;
+ case 0x4:
+ ps += 667;
+ break;
+ case 0x5:
+ ps += 750;
+ break;
+ }
+ t_rfc_ps = max(t_rfc_ps, ps);
+ }
+ }
+ debug("t_wtr_ps = %d\n", t_wtr_ps);
+ t_wtr_clk = (MULDIV64(sdram_freq, t_wtr_ps, ONE_BILLION) + 999) / 1000;
+ debug("t_rfc_ps = %d\n", t_rfc_ps);
+ t_rfc_clk = (MULDIV64(sdram_freq, t_rfc_ps, ONE_BILLION) + 999) / 1000;
+ mtsdram(DDR0_06, ddr0_06 | DDR0_06_TWTR_ENCODE(t_wtr_clk) |
+ DDR0_06_TRFC_ENCODE(t_rfc_clk));
+}
+
+static void program_ddr0_10(unsigned long dimm_ranks[], unsigned long ranks)
+{
+ unsigned long csmap;
+
+ if (2 == ranks) {
+ /* Both chip selects in use */
+ csmap = 0x03;
+ } else {
+ /* One chip select in use */
+ csmap = (1 == dimm_ranks[0]) ? 0x1 : 0x2;
+ }
+ mtsdram(DDR0_10, DDR0_10_WRITE_MODEREG_ENCODE(0x0) |
+ DDR0_10_CS_MAP_ENCODE(csmap) |
+ DDR0_10_OCD_ADJUST_PUP_CS_0_ENCODE(0));
+}
+
+static void program_ddr0_11(unsigned long sdram_freq)
+{
+ unsigned long const t_xsnr_ps = 200000; /* 200 ns */
+ unsigned long t_xsnr_clk;
+
+ debug("t_xsnr_ps = %d\n", t_xsnr_ps);
+ t_xsnr_clk =
+ (MULDIV64(sdram_freq, t_xsnr_ps, ONE_BILLION) + 999) / 1000;
+ mtsdram(DDR0_11, DDR0_11_SREFRESH_ENCODE(0) |
+ DDR0_11_TXSNR_ENCODE(t_xsnr_clk) | DDR0_11_TXSR_ENCODE(200));
+}
+
+static void program_ddr0_22(unsigned long dimm_ranks[],
+ unsigned char const iic0_dimm_addr[],
+ unsigned long num_dimm_banks, unsigned long width)
+{
+#if defined(CONFIG_DDR_ECC)
+ unsigned long dimm_num;
+ unsigned long ecc_available = width >= 64;
+ u32 ddr0_22 = DDR0_22_DQS_OUT_SHIFT_BYPASS_ENCODE(0x26) |
+ DDR0_22_DQS_OUT_SHIFT_ENCODE(DQS_OUT_SHIFT) |
+ DDR0_22_DLL_DQS_BYPASS_8_ENCODE(DLL_DQS_BYPASS);
+
+ /* loop through all the DIMM slots on the board */
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ /* If a dimm is installed in a particular slot ... */
+ if (dimm_ranks[dimm_num]) {
+ /* Check for ECC */
+ if (0 == (spd_read(iic0_dimm_addr[dimm_num], 11) &
+ 0x02)) {
+ ecc_available = FALSE;
+ }
+ }
+ }
+ if (ecc_available) {
+ debug("ECC found on all DIMMs present\n");
+ mtsdram(DDR0_22, ddr0_22 | DDR0_22_CTRL_RAW_ENCODE(0x3));
+ } else {
+ debug("ECC not found on some or all DIMMs present\n");
+ mtsdram(DDR0_22, ddr0_22 | DDR0_22_CTRL_RAW_ENCODE(0x0));
+ }
+#else
+ mtsdram(DDR0_22, DDR0_22_CTRL_RAW_ENCODE(0x0) |
+ DDR0_22_DQS_OUT_SHIFT_BYPASS_ENCODE(0x26) |
+ DDR0_22_DQS_OUT_SHIFT_ENCODE(DQS_OUT_SHIFT) |
+ DDR0_22_DLL_DQS_BYPASS_8_ENCODE(DLL_DQS_BYPASS));
+#endif /* defined(CONFIG_DDR_ECC) */
+}
+
+static void program_ddr0_24(unsigned long ranks)
+{
+ u32 ddr0_24 = DDR0_24_RTT_PAD_TERMINATION_ENCODE(0x1) | /* 75 ohm */
+ DDR0_24_ODT_RD_MAP_CS1_ENCODE(0x0);
+
+ if (2 == ranks) {
+ /* Both chip selects in use */
+ ddr0_24 |= DDR0_24_ODT_WR_MAP_CS1_ENCODE(0x1) |
+ DDR0_24_ODT_WR_MAP_CS0_ENCODE(0x2);
+ } else {
+ /* One chip select in use */
+ /* One of the two fields added to ddr0_24 is a "don't care" */
+ ddr0_24 |= DDR0_24_ODT_WR_MAP_CS1_ENCODE(0x2) |
+ DDR0_24_ODT_WR_MAP_CS0_ENCODE(0x1);
+ }
+ mtsdram(DDR0_24, ddr0_24);
+}
+
+static void program_ddr0_26(unsigned long sdram_freq)
+{
+ unsigned long const t_ref_ps = 7800000; /* 7.8 us. refresh */
+ /* TODO: check definition of tRAS_MAX */
+ unsigned long const t_ras_max_ps = 9 * t_ref_ps;
+ unsigned long t_ras_max_clk;
+ unsigned long t_ref_clk;
+
+ /* Round down t_ras_max_clk and t_ref_clk */
+ debug("t_ras_max_ps = %d\n", t_ras_max_ps);
+ t_ras_max_clk = MULDIV64(sdram_freq, t_ras_max_ps, ONE_BILLION) / 1000;
+ debug("t_ref_ps = %d\n", t_ref_ps);
+ t_ref_clk = MULDIV64(sdram_freq, t_ref_ps, ONE_BILLION) / 1000;
+ mtsdram(DDR0_26, DDR0_26_TRAS_MAX_ENCODE(t_ras_max_clk) |
+ DDR0_26_TREF_ENCODE(t_ref_clk));
+}
+
+static void program_ddr0_27(unsigned long sdram_freq)
+{
+ unsigned long const t_init_ps = 200000000; /* 200 us. init */
+ unsigned long t_init_clk;
+
+ debug("t_init_ps = %d\n", t_init_ps);
+ t_init_clk =
+ (MULDIV64(sdram_freq, t_init_ps, ONE_BILLION) + 999) / 1000;
+ mtsdram(DDR0_27, DDR0_27_EMRS_DATA_ENCODE(0x0000) |
+ DDR0_27_TINIT_ENCODE(t_init_clk));
+}
+
+static void program_ddr0_43(unsigned long dimm_ranks[],
+ unsigned char const iic0_dimm_addr[],
+ unsigned long num_dimm_banks,
+ unsigned long sdram_freq,
+ unsigned long cols, unsigned long banks)
+{
+ unsigned long dimm_num;
+ unsigned long t_wr_ps = 0;
+ unsigned long t_wr_clk;
+ u32 ddr0_43 = DDR0_43_APREBIT_ENCODE(10) |
+ DDR0_43_COLUMN_SIZE_ENCODE(12 - cols) |
+ DDR0_43_EIGHT_BANK_MODE_ENCODE(8 == banks ? 1 : 0);
+
+ /*------------------------------------------------------------------
+ * Handle the timing. We need to find the worst case timing of all
+ * the dimm modules installed.
+ *-----------------------------------------------------------------*/
+ /* loop through all the DIMM slots on the board */
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ /* If a dimm is installed in a particular slot ... */
+ if (dimm_ranks[dimm_num]) {
+ unsigned long ps;
+
+ ps = 250 * spd_read(iic0_dimm_addr[dimm_num], 36);
+ t_wr_ps = max(t_wr_ps, ps);
+ }
+ }
+ debug("t_wr_ps = %d\n", t_wr_ps);
+ t_wr_clk = (MULDIV64(sdram_freq, t_wr_ps, ONE_BILLION) + 999) / 1000;
+ mtsdram(DDR0_43, ddr0_43 | DDR0_43_TWR_ENCODE(t_wr_clk));
+}
+
+static void program_ddr0_44(unsigned long dimm_ranks[],
+ unsigned char const iic0_dimm_addr[],
+ unsigned long num_dimm_banks,
+ unsigned long sdram_freq)
+{
+ unsigned long dimm_num;
+ unsigned long t_rcd_ps = 0;
+ unsigned long t_rcd_clk;
+
+ /*------------------------------------------------------------------
+ * Handle the timing. We need to find the worst case timing of all
+ * the dimm modules installed.
+ *-----------------------------------------------------------------*/
+ /* loop through all the DIMM slots on the board */
+ for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
+ /* If a dimm is installed in a particular slot ... */
+ if (dimm_ranks[dimm_num]) {
+ unsigned long ps;
+
+ ps = 250 * spd_read(iic0_dimm_addr[dimm_num], 29);
+ t_rcd_ps = max(t_rcd_ps, ps);
+ }
+ }
+ debug("t_rcd_ps = %d\n", t_rcd_ps);
+ t_rcd_clk = (MULDIV64(sdram_freq, t_rcd_ps, ONE_BILLION) + 999) / 1000;
+ mtsdram(DDR0_44, DDR0_44_TRCD_ENCODE(t_rcd_clk));
+}
+
+/*-----------------------------------------------------------------------------+
+ * initdram. Initializes the 440EPx/GPx DDR SDRAM controller.
+ * Note: This routine runs from flash with a stack set up in the chip's
+ * sram space. It is important that the routine does not require .sbss, .bss or
+ * .data sections. It also cannot call routines that require these sections.
+ *-----------------------------------------------------------------------------*/
+/*-----------------------------------------------------------------------------
+ * Function: initdram
+ * Description: Configures SDRAM memory banks for DDR operation.
+ * Auto Memory Configuration option reads the DDR SDRAM EEPROMs
+ * via the IIC bus and then configures the DDR SDRAM memory
+ * banks appropriately. If Auto Memory Configuration is
+ * not used, it is assumed that no DIMM is plugged
+ *-----------------------------------------------------------------------------*/
+long int initdram(int board_type)
+{
+ unsigned char const iic0_dimm_addr[] = SPD_EEPROM_ADDRESS;
+ unsigned long dimm_ranks[MAXDIMMS];
+ unsigned long ranks;
+ unsigned long rows;
+ unsigned long banks;
+ unsigned long cols;
+ unsigned long width;
+ unsigned long const sdram_freq = get_bus_freq(0);
+ unsigned long const num_dimm_banks = sizeof(iic0_dimm_addr); /* on board dimm banks */
+ unsigned long cas_latency = 0; /* to quiet initialization warning */
+ unsigned long dram_size;
+
+ debug("\nEntering initdram()\n");
+
+ /*------------------------------------------------------------------
+ * Stop the DDR-SDRAM controller.
+ *-----------------------------------------------------------------*/
+ mtsdram(DDR0_02, DDR0_02_START_ENCODE(0));
+
+ /*
+ * Make sure I2C controller is initialized
+ * before continuing.
+ */
+ /* switch to correct I2C bus */
+ I2C_SET_BUS(CFG_SPD_BUS_NUM);
+ i2c_init(CFG_I2C_SPEED, CFG_I2C_SLAVE);
+
+ /*------------------------------------------------------------------
+ * Clear out the serial presence detect buffers.
+ * Perform IIC reads from the dimm. Fill in the spds.
+ * Check to see if the dimm slots are populated
+ *-----------------------------------------------------------------*/
+ get_spd_info(dimm_ranks, &ranks, iic0_dimm_addr, num_dimm_banks);
+
+ /*------------------------------------------------------------------
+ * Check the frequency supported for the dimms plugged.
+ *-----------------------------------------------------------------*/
+ check_frequency(dimm_ranks, iic0_dimm_addr, num_dimm_banks, sdram_freq);
+
+ /*------------------------------------------------------------------
+ * Check and get size information.
+ *-----------------------------------------------------------------*/
+ get_dimm_size(dimm_ranks, iic0_dimm_addr, num_dimm_banks, &rows, &banks,
+ &cols, &width);
+
+ /*------------------------------------------------------------------
+ * Check the voltage type for the dimms plugged.
+ *-----------------------------------------------------------------*/
+ check_voltage_type(dimm_ranks, iic0_dimm_addr, num_dimm_banks);
+
+ /*------------------------------------------------------------------
+ * Program registers for SDRAM controller.
+ *-----------------------------------------------------------------*/
+ mtsdram(DDR0_00, DDR0_00_DLL_INCREMENT_ENCODE(0x19) |
+ DDR0_00_DLL_START_POINT_DECODE(0x0A));
+
+ mtsdram(DDR0_01, DDR0_01_PLB0_DB_CS_LOWER_ENCODE(0x01) |
+ DDR0_01_PLB0_DB_CS_UPPER_ENCODE(0x00) |
+ DDR0_01_INT_MASK_ENCODE(0xFF));
+
+ program_ddr0_03(dimm_ranks, iic0_dimm_addr, num_dimm_banks, sdram_freq,
+ rows, &cas_latency);
+
+ program_ddr0_04(dimm_ranks, iic0_dimm_addr, num_dimm_banks, sdram_freq);
+
+ program_ddr0_05(dimm_ranks, iic0_dimm_addr, num_dimm_banks, sdram_freq);
+
+ program_ddr0_06(dimm_ranks, iic0_dimm_addr, num_dimm_banks, sdram_freq);
+
+ /*------------------------------------------------------------------
+ * TODO: tFAW not found in SPD. Value of 13 taken from Sequoia
+ * board SDRAM, but may be overly concervate.
+ *-----------------------------------------------------------------*/
+ mtsdram(DDR0_07, DDR0_07_NO_CMD_INIT_ENCODE(0) |
+ DDR0_07_TFAW_ENCODE(13) |
+ DDR0_07_AUTO_REFRESH_MODE_ENCODE(1) |
+ DDR0_07_AREFRESH_ENCODE(0));
+
+ mtsdram(DDR0_08, DDR0_08_WRLAT_ENCODE(cas_latency - 1) |
+ DDR0_08_TCPD_ENCODE(200) | DDR0_08_DQS_N_EN_ENCODE(0) |
+ DDR0_08_DDRII_ENCODE(1));
+
+ mtsdram(DDR0_09, DDR0_09_OCD_ADJUST_PDN_CS_0_ENCODE(0x00) |
+ DDR0_09_RTT_0_ENCODE(0x1) |
+ DDR0_09_WR_DQS_SHIFT_BYPASS_ENCODE(0x1D) |
+ DDR0_09_WR_DQS_SHIFT_ENCODE(DQS_OUT_SHIFT - 0x20));
+
+ program_ddr0_10(dimm_ranks, ranks);
+
+ program_ddr0_11(sdram_freq);
+
+ mtsdram(DDR0_12, DDR0_12_TCKE_ENCODE(3));
+
+ mtsdram(DDR0_14, DDR0_14_DLL_BYPASS_MODE_ENCODE(0) |
+ DDR0_14_REDUC_ENCODE(width <= 40 ? 1 : 0) |
+ DDR0_14_REG_DIMM_ENABLE_ENCODE(0));
+
+ mtsdram(DDR0_17, DDR0_17_DLL_DQS_DELAY_0_ENCODE(DLL_DQS_DELAY));
+
+ mtsdram(DDR0_18, DDR0_18_DLL_DQS_DELAY_4_ENCODE(DLL_DQS_DELAY) |
+ DDR0_18_DLL_DQS_DELAY_3_ENCODE(DLL_DQS_DELAY) |
+ DDR0_18_DLL_DQS_DELAY_2_ENCODE(DLL_DQS_DELAY) |
+ DDR0_18_DLL_DQS_DELAY_1_ENCODE(DLL_DQS_DELAY));
+
+ mtsdram(DDR0_19, DDR0_19_DLL_DQS_DELAY_8_ENCODE(DLL_DQS_DELAY) |
+ DDR0_19_DLL_DQS_DELAY_7_ENCODE(DLL_DQS_DELAY) |
+ DDR0_19_DLL_DQS_DELAY_6_ENCODE(DLL_DQS_DELAY) |
+ DDR0_19_DLL_DQS_DELAY_5_ENCODE(DLL_DQS_DELAY));
+
+ mtsdram(DDR0_20, DDR0_20_DLL_DQS_BYPASS_3_ENCODE(DLL_DQS_BYPASS) |
+ DDR0_20_DLL_DQS_BYPASS_2_ENCODE(DLL_DQS_BYPASS) |
+ DDR0_20_DLL_DQS_BYPASS_1_ENCODE(DLL_DQS_BYPASS) |
+ DDR0_20_DLL_DQS_BYPASS_0_ENCODE(DLL_DQS_BYPASS));
+
+ mtsdram(DDR0_21, DDR0_21_DLL_DQS_BYPASS_7_ENCODE(DLL_DQS_BYPASS) |
+ DDR0_21_DLL_DQS_BYPASS_6_ENCODE(DLL_DQS_BYPASS) |
+ DDR0_21_DLL_DQS_BYPASS_5_ENCODE(DLL_DQS_BYPASS) |
+ DDR0_21_DLL_DQS_BYPASS_4_ENCODE(DLL_DQS_BYPASS));
+
+ program_ddr0_22(dimm_ranks, iic0_dimm_addr, num_dimm_banks, width);
+
+ mtsdram(DDR0_23, DDR0_23_ODT_RD_MAP_CS0_ENCODE(0x0) |
+ DDR0_23_FWC_ENCODE(0));
+
+ program_ddr0_24(ranks);
+
+ program_ddr0_26(sdram_freq);
+
+ program_ddr0_27(sdram_freq);
+
+ mtsdram(DDR0_28, DDR0_28_EMRS3_DATA_ENCODE(0x0000) |
+ DDR0_28_EMRS2_DATA_ENCODE(0x0000));
+
+ mtsdram(DDR0_31, DDR0_31_XOR_CHECK_BITS_ENCODE(0x0000));
+
+ mtsdram(DDR0_42, DDR0_42_ADDR_PINS_DECODE(14 - rows) |
+ DDR0_42_CASLAT_LIN_GATE_ENCODE(2 * cas_latency));
+
+ program_ddr0_43(dimm_ranks, iic0_dimm_addr, num_dimm_banks, sdram_freq,
+ cols, banks);
+
+ program_ddr0_44(dimm_ranks, iic0_dimm_addr, num_dimm_banks, sdram_freq);
+
+ denali_sdram_register_dump();
+
+ dram_size = (width >= 64) ? 8 : 4;
+ dram_size *= 1 << cols;
+ dram_size *= banks;
+ dram_size *= 1 << rows;
+ dram_size *= ranks;
+ debug("dram_size = %lu\n", dram_size);
+
+ /* Start the SDRAM controler */
+ mtsdram(DDR0_02, DDR0_02_START_ENCODE(1));
+ denali_wait_for_dlllock();
+
+#if defined(CONFIG_DDR_DATA_EYE)
+ /* -----------------------------------------------------------+
+ * Perform data eye search if requested.
+ * ----------------------------------------------------------*/
+ program_tlb(0, CFG_SDRAM_BASE, dram_size, TLB_WORD2_I_ENABLE);
+ denali_core_search_data_eye();
+ denali_sdram_register_dump();
+ remove_tlb(CFG_SDRAM_BASE, dram_size);
+#endif
+
+#if defined(CONFIG_ZERO_SDRAM) || defined(CONFIG_DDR_ECC)
+ program_tlb(0, CFG_SDRAM_BASE, dram_size, 0);
+ sync();
+ eieio();
+ /* Zero the memory */
+ debug("Zeroing SDRAM...");
+ dcbz_area(CFG_SDRAM_BASE, dram_size);
+ dflush();
+ debug("Completed\n");
+ sync();
+ eieio();
+ remove_tlb(CFG_SDRAM_BASE, dram_size);
+
+#if defined(CONFIG_DDR_ECC)
+ /*
+ * If ECC is enabled, clear and enable interrupts
+ */
+ if (is_ecc_enabled()) {
+ u32 val;
+
+ sync();
+ eieio();
+ /* Clear error status */
+ mfsdram(DDR0_00, val);
+ mtsdram(DDR0_00, val | DDR0_00_INT_ACK_ALL);
+ /* Set 'int_mask' parameter to functionnal value */
+ mfsdram(DDR0_01, val);
+ mtsdram(DDR0_01, (val & ~DDR0_01_INT_MASK_MASK) |
+ DDR0_01_INT_MASK_ALL_OFF);
+#if defined(CONFIG_DDR_DATA_EYE)
+ /*
+ * Running denali_core_search_data_eye() when ECC is enabled
+ * causes non-ECC machine checks. This clears them.
+ */
+ print_mcsr();
+ mtspr(SPRN_MCSR, mfspr(SPRN_MCSR));
+ print_mcsr();
+#endif
+ sync();
+ eieio();
+ }
+#endif /* defined(CONFIG_DDR_ECC) */
+#endif /* defined(CONFIG_ZERO_SDRAM) || defined(CONFIG_DDR_ECC) */
+
+ program_tlb(0, CFG_SDRAM_BASE, dram_size, MY_TLB_WORD2_I_ENABLE);
+ return dram_size;
+}
+
+void board_add_ram_info(int use_default)
+{
+ u32 val;
+
+ printf(" (ECC");
+ if (!is_ecc_enabled()) {
+ printf(" not");
+ }
+ printf(" enabled, %d MHz", (2 * get_bus_freq(0)) / 1000000);
+
+ mfsdram(DDR0_03, val);
+ printf(", CL%d)", DDR0_03_CASLAT_LIN_DECODE(val) >> 1);
+}
+#endif /* CONFIG_SPD_EEPROM */
projects / u-boot / commitdiff