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-rw-r--r--arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c41
-rw-r--r--arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c3
-rw-r--r--arch/powerpc/cpu/mpc8xxx/ddr/main.c11
-rw-r--r--arch/powerpc/cpu/mpc8xxx/ddr/options.c259
-rw-r--r--arch/powerpc/cpu/mpc8xxx/ddr/util.c35
5 files changed, 298 insertions, 51 deletions
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c
index 3824aade89d..15cd375ae36 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c
@@ -18,7 +18,9 @@
#include "ddr.h"
-#ifdef CONFIG_MPC85xx
+#ifdef CONFIG_MPC83xx
+ #define _DDR_ADDR CONFIG_SYS_MPC83xx_DDR_ADDR
+#elif defined(CONFIG_MPC85xx)
#define _DDR_ADDR CONFIG_SYS_MPC85xx_DDR_ADDR
#elif defined(CONFIG_MPC86xx)
#define _DDR_ADDR CONFIG_SYS_MPC86xx_DDR_ADDR
@@ -94,6 +96,10 @@ static inline int fsl_ddr_get_rtt(void)
* 6 if 2.5ns > tCK >= 1.875ns
* 7 if 1.875ns > tCK >= 1.5ns
* 8 if 1.5ns > tCK >= 1.25ns
+ * 9 if 1.25ns > tCK >= 1.07ns
+ * 10 if 1.07ns > tCK >= 0.935ns
+ * 11 if 0.935ns > tCK >= 0.833ns
+ * 12 if 0.833ns > tCK >= 0.75ns
*/
static inline unsigned int compute_cas_write_latency(void)
{
@@ -108,8 +114,18 @@ static inline unsigned int compute_cas_write_latency(void)
cwl = 7;
else if (mclk_ps >= 1250)
cwl = 8;
- else
- cwl = 8;
+ else if (mclk_ps >= 1070)
+ cwl = 9;
+ else if (mclk_ps >= 935)
+ cwl = 10;
+ else if (mclk_ps >= 833)
+ cwl = 11;
+ else if (mclk_ps >= 750)
+ cwl = 12;
+ else {
+ cwl = 12;
+ printf("Warning: CWL is out of range\n");
+ }
return cwl;
}
@@ -146,7 +162,7 @@ static void set_csn_config(int dimm_number, int i, fsl_ddr_cfg_regs_t *ddr,
break;
case 2:
if ((dimm_number == 0 && dimm_params[0].n_ranks > 2) || \
- (dimm_number > 1 && dimm_params[dimm_number].n_ranks > 0))
+ (dimm_number >= 1 && dimm_params[dimm_number].n_ranks > 0))
go_config = 1;
break;
case 3:
@@ -617,7 +633,7 @@ static void set_ddr_sdram_cfg_2(fsl_ddr_cfg_regs_t *ddr,
unsigned int sr_ie = 0; /* Self-refresh interrupt enable */
unsigned int dll_rst_dis; /* DLL reset disable */
unsigned int dqs_cfg; /* DQS configuration */
- unsigned int odt_cfg; /* ODT configuration */
+ unsigned int odt_cfg = 0; /* ODT configuration */
unsigned int num_pr; /* Number of posted refreshes */
unsigned int obc_cfg; /* On-The-Fly Burst Chop Cfg */
unsigned int ap_en; /* Address Parity Enable */
@@ -625,15 +641,16 @@ static void set_ddr_sdram_cfg_2(fsl_ddr_cfg_regs_t *ddr,
unsigned int rcw_en = 0; /* Register Control Word Enable */
unsigned int md_en = 0; /* Mirrored DIMM Enable */
unsigned int qd_en = 0; /* quad-rank DIMM Enable */
+ int i;
dll_rst_dis = 1; /* Make this configurable */
dqs_cfg = popts->DQS_config;
- if (popts->cs_local_opts[0].odt_rd_cfg
- || popts->cs_local_opts[0].odt_wr_cfg) {
- /* FIXME */
- odt_cfg = 2;
- } else {
- odt_cfg = 0;
+ for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
+ if (popts->cs_local_opts[i].odt_rd_cfg
+ || popts->cs_local_opts[i].odt_wr_cfg) {
+ odt_cfg = SDRAM_CFG2_ODT_ONLY_READ;
+ break;
+ }
}
num_pr = 1; /* Make this configurable */
@@ -1018,7 +1035,7 @@ static void set_ddr_sdram_mode(fsl_ddr_cfg_regs_t *ddr,
#if defined(CONFIG_FSL_DDR2)
const unsigned int mclk_ps = get_memory_clk_period_ps();
#endif
-
+ dqs_en = !popts->DQS_config;
rtt = fsl_ddr_get_rtt();
al = additive_latency;
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c b/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c
index 8132e68d9d6..20c7db03ede 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c
@@ -448,7 +448,8 @@ compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params,
#if defined(CONFIG_FSL_DDR2)
if (lowest_good_caslat < 4) {
- additive_latency = picos_to_mclk(tRCD_ps) - lowest_good_caslat;
+ additive_latency = (picos_to_mclk(tRCD_ps) > lowest_good_caslat)
+ ? picos_to_mclk(tRCD_ps) - lowest_good_caslat : 0;
if (mclk_to_picos(additive_latency) > tRCD_ps) {
additive_latency = picos_to_mclk(tRCD_ps);
debug("setting additive_latency to %u because it was "
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/main.c b/arch/powerpc/cpu/mpc8xxx/ddr/main.c
index 249fd7dfb36..5699b0c2cc9 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/main.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/main.c
@@ -34,14 +34,17 @@ extern void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = {
[0][0] = SPD_EEPROM_ADDRESS,
};
-#endif
-#if (CONFIG_NUM_DDR_CONTROLLERS == 2) && (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
+#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 */
};
-#endif
-#if (CONFIG_NUM_DDR_CONTROLLERS == 2) && (CONFIG_DIMM_SLOTS_PER_CTLR == 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 */
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/options.c b/arch/powerpc/cpu/mpc8xxx/ddr/options.c
index bd9c4663e79..4dc748b9510 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/options.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/options.c
@@ -26,14 +26,15 @@ extern void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num);
-typedef struct {
+struct dynamic_odt {
unsigned int odt_rd_cfg;
unsigned int odt_wr_cfg;
unsigned int odt_rtt_norm;
unsigned int odt_rtt_wr;
-} dynamic_odt_t;
+};
-static const dynamic_odt_t single_Q[4] = {
+#ifdef CONFIG_FSL_DDR3
+static const struct dynamic_odt single_Q[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS_AND_OTHER_DIMM,
@@ -60,7 +61,7 @@ static const dynamic_odt_t single_Q[4] = {
}
};
-static const dynamic_odt_t single_D[4] = {
+static const struct dynamic_odt single_D[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_ALL,
@@ -77,7 +78,7 @@ static const dynamic_odt_t single_D[4] = {
{0, 0, 0, 0}
};
-static const dynamic_odt_t single_S[4] = {
+static const struct dynamic_odt single_S[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_ALL,
@@ -89,7 +90,7 @@ static const dynamic_odt_t single_S[4] = {
{0, 0, 0, 0},
};
-static const dynamic_odt_t dual_DD[4] = {
+static const struct dynamic_odt dual_DD[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
@@ -116,7 +117,7 @@ static const dynamic_odt_t dual_DD[4] = {
}
};
-static const dynamic_odt_t dual_DS[4] = {
+static const struct dynamic_odt dual_DS[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
@@ -137,7 +138,7 @@ static const dynamic_odt_t dual_DS[4] = {
},
{0, 0, 0, 0}
};
-static const dynamic_odt_t dual_SD[4] = {
+static const struct dynamic_odt dual_SD[4] = {
{ /* cs0 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_ALL,
@@ -159,7 +160,7 @@ static const dynamic_odt_t dual_SD[4] = {
}
};
-static const dynamic_odt_t dual_SS[4] = {
+static const struct dynamic_odt dual_SS[4] = {
{ /* cs0 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_ALL,
@@ -176,7 +177,7 @@ static const dynamic_odt_t dual_SS[4] = {
{0, 0, 0, 0}
};
-static const dynamic_odt_t dual_D0[4] = {
+static const struct dynamic_odt dual_D0[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
@@ -193,7 +194,7 @@ static const dynamic_odt_t dual_D0[4] = {
{0, 0, 0, 0}
};
-static const dynamic_odt_t dual_0D[4] = {
+static const struct dynamic_odt dual_0D[4] = {
{0, 0, 0, 0},
{0, 0, 0, 0},
{ /* cs2 */
@@ -210,7 +211,7 @@ static const dynamic_odt_t dual_0D[4] = {
}
};
-static const dynamic_odt_t dual_S0[4] = {
+static const struct dynamic_odt dual_S0[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
@@ -223,7 +224,7 @@ static const dynamic_odt_t dual_S0[4] = {
};
-static const dynamic_odt_t dual_0S[4] = {
+static const struct dynamic_odt dual_0S[4] = {
{0, 0, 0, 0},
{0, 0, 0, 0},
{ /* cs2 */
@@ -236,7 +237,7 @@ static const dynamic_odt_t dual_0S[4] = {
};
-static const dynamic_odt_t odt_unknown[4] = {
+static const struct dynamic_odt odt_unknown[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
@@ -262,7 +263,218 @@ static const dynamic_odt_t odt_unknown[4] = {
DDR3_RTT_OFF
}
};
+#else /* CONFIG_FSL_DDR3 */
+static const struct dynamic_odt single_Q[4] = {
+ {0, 0, 0, 0},
+ {0, 0, 0, 0},
+ {0, 0, 0, 0},
+ {0, 0, 0, 0}
+};
+
+static const struct dynamic_odt single_D[4] = {
+ { /* cs0 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_ALL,
+ DDR2_RTT_150_OHM,
+ DDR2_RTT_OFF
+ },
+ { /* cs1 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_NEVER,
+ DDR2_RTT_OFF,
+ DDR2_RTT_OFF
+ },
+ {0, 0, 0, 0},
+ {0, 0, 0, 0}
+};
+static const struct dynamic_odt single_S[4] = {
+ { /* cs0 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_ALL,
+ DDR2_RTT_150_OHM,
+ DDR2_RTT_OFF
+ },
+ {0, 0, 0, 0},
+ {0, 0, 0, 0},
+ {0, 0, 0, 0},
+};
+
+static const struct dynamic_odt dual_DD[4] = {
+ { /* cs0 */
+ FSL_DDR_ODT_OTHER_DIMM,
+ FSL_DDR_ODT_OTHER_DIMM,
+ DDR2_RTT_75_OHM,
+ DDR2_RTT_OFF
+ },
+ { /* cs1 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_NEVER,
+ DDR2_RTT_OFF,
+ DDR2_RTT_OFF
+ },
+ { /* cs2 */
+ FSL_DDR_ODT_OTHER_DIMM,
+ FSL_DDR_ODT_OTHER_DIMM,
+ DDR2_RTT_75_OHM,
+ DDR2_RTT_OFF
+ },
+ { /* cs3 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_NEVER,
+ DDR2_RTT_OFF,
+ DDR2_RTT_OFF
+ }
+};
+
+static const struct dynamic_odt dual_DS[4] = {
+ { /* cs0 */
+ FSL_DDR_ODT_OTHER_DIMM,
+ FSL_DDR_ODT_OTHER_DIMM,
+ DDR2_RTT_75_OHM,
+ DDR2_RTT_OFF
+ },
+ { /* cs1 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_NEVER,
+ DDR2_RTT_OFF,
+ DDR2_RTT_OFF
+ },
+ { /* cs2 */
+ FSL_DDR_ODT_OTHER_DIMM,
+ FSL_DDR_ODT_OTHER_DIMM,
+ DDR2_RTT_75_OHM,
+ DDR2_RTT_OFF
+ },
+ {0, 0, 0, 0}
+};
+
+static const struct dynamic_odt dual_SD[4] = {
+ { /* cs0 */
+ FSL_DDR_ODT_OTHER_DIMM,
+ FSL_DDR_ODT_OTHER_DIMM,
+ DDR2_RTT_75_OHM,
+ DDR2_RTT_OFF
+ },
+ {0, 0, 0, 0},
+ { /* cs2 */
+ FSL_DDR_ODT_OTHER_DIMM,
+ FSL_DDR_ODT_OTHER_DIMM,
+ DDR2_RTT_75_OHM,
+ DDR2_RTT_OFF
+ },
+ { /* cs3 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_NEVER,
+ DDR2_RTT_OFF,
+ DDR2_RTT_OFF
+ }
+};
+
+static const struct dynamic_odt dual_SS[4] = {
+ { /* cs0 */
+ FSL_DDR_ODT_OTHER_DIMM,
+ FSL_DDR_ODT_OTHER_DIMM,
+ DDR2_RTT_75_OHM,
+ DDR2_RTT_OFF
+ },
+ {0, 0, 0, 0},
+ { /* cs2 */
+ FSL_DDR_ODT_OTHER_DIMM,
+ FSL_DDR_ODT_OTHER_DIMM,
+ DDR2_RTT_75_OHM,
+ DDR2_RTT_OFF
+ },
+ {0, 0, 0, 0}
+};
+
+static const struct dynamic_odt dual_D0[4] = {
+ { /* cs0 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_ALL,
+ DDR2_RTT_150_OHM,
+ DDR2_RTT_OFF
+ },
+ { /* cs1 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_NEVER,
+ DDR2_RTT_OFF,
+ DDR2_RTT_OFF
+ },
+ {0, 0, 0, 0},
+ {0, 0, 0, 0}
+};
+
+static const struct dynamic_odt dual_0D[4] = {
+ {0, 0, 0, 0},
+ {0, 0, 0, 0},
+ { /* cs2 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_ALL,
+ DDR2_RTT_150_OHM,
+ DDR2_RTT_OFF
+ },
+ { /* cs3 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_NEVER,
+ DDR2_RTT_OFF,
+ DDR2_RTT_OFF
+ }
+};
+
+static const struct dynamic_odt dual_S0[4] = {
+ { /* cs0 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_CS,
+ DDR2_RTT_150_OHM,
+ DDR2_RTT_OFF
+ },
+ {0, 0, 0, 0},
+ {0, 0, 0, 0},
+ {0, 0, 0, 0}
+
+};
+
+static const struct dynamic_odt dual_0S[4] = {
+ {0, 0, 0, 0},
+ {0, 0, 0, 0},
+ { /* cs2 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_CS,
+ DDR2_RTT_150_OHM,
+ DDR2_RTT_OFF
+ },
+ {0, 0, 0, 0}
+
+};
+
+static const struct dynamic_odt odt_unknown[4] = {
+ { /* cs0 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_CS,
+ DDR2_RTT_75_OHM,
+ DDR2_RTT_OFF
+ },
+ { /* cs1 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_NEVER,
+ DDR2_RTT_OFF,
+ DDR2_RTT_OFF
+ },
+ { /* cs2 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_CS,
+ DDR2_RTT_75_OHM,
+ DDR2_RTT_OFF
+ },
+ { /* cs3 */
+ FSL_DDR_ODT_NEVER,
+ FSL_DDR_ODT_NEVER,
+ DDR2_RTT_OFF,
+ DDR2_RTT_OFF
+ }
+};
+#endif
unsigned int populate_memctl_options(int all_DIMMs_registered,
memctl_options_t *popts,
dimm_params_t *pdimm,
@@ -271,7 +483,8 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
unsigned int i;
char buffer[HWCONFIG_BUFFER_SIZE];
char *buf = NULL;
- const dynamic_odt_t *pdodt = odt_unknown;
+ const struct dynamic_odt *pdodt = odt_unknown;
+ ulong ddr_freq;
/*
* Extract hwconfig from environment since we have not properly setup
@@ -336,7 +549,7 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
/* Pick chip-select local options. */
for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
-#if defined(CONFIG_FSL_DDR3)
+#if defined(CONFIG_FSL_DDR3) || defined(CONFIG_FSL_DDR2)
popts->cs_local_opts[i].odt_rd_cfg = pdodt[i].odt_rd_cfg;
popts->cs_local_opts[i].odt_wr_cfg = pdodt[i].odt_wr_cfg;
popts->cs_local_opts[i].odt_rtt_norm = pdodt[i].odt_rtt_norm;
@@ -716,6 +929,20 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
if (pdimm[0].n_ranks == 4)
popts->quad_rank_present = 1;
+ ddr_freq = get_ddr_freq(0) / 1000000;
+ if (popts->registered_dimm_en) {
+ popts->rcw_override = 1;
+ popts->rcw_1 = 0x000a5a00;
+ if (ddr_freq <= 800)
+ popts->rcw_2 = 0x00000000;
+ else if (ddr_freq <= 1066)
+ popts->rcw_2 = 0x00100000;
+ else if (ddr_freq <= 1333)
+ popts->rcw_2 = 0x00200000;
+ else
+ popts->rcw_2 = 0x00300000;
+ }
+
fsl_ddr_board_options(popts, pdimm, ctrl_num);
return 0;
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/util.c b/arch/powerpc/cpu/mpc8xxx/ddr/util.c
index 104d360a5f1..eb6a17a8503 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/util.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/util.c
@@ -20,7 +20,8 @@
#define ULL_8FS 0xFFFFFFFFULL
/*
- * Round mclk_ps to nearest 10 ps in memory controller code.
+ * Round up mclk_ps to nearest 1 ps in memory controller code
+ * if the error is 0.5ps or more.
*
* If an imprecise data rate is too high due to rounding error
* propagation, compute a suitably rounded mclk_ps to compute
@@ -32,42 +33,37 @@ unsigned int get_memory_clk_period_ps(void)
unsigned int result;
/* Round to nearest 10ps, being careful about 64-bit multiply/divide */
- unsigned long long mclk_ps = ULL_2E12;
-
- /* Add 5*data_rate, for rounding */
- mclk_ps += 5*(unsigned long long)data_rate;
+ unsigned long long rem, mclk_ps = ULL_2E12;
/* Now perform the big divide, the result fits in 32-bits */
- do_div(mclk_ps, data_rate);
- result = mclk_ps;
+ rem = do_div(mclk_ps, data_rate);
+ result = (rem >= (data_rate >> 1)) ? mclk_ps + 1 : mclk_ps;
- /* We still need to round to 10ps */
- return 10 * (result/10);
+ return result;
}
/* Convert picoseconds into DRAM clock cycles (rounding up if needed). */
unsigned int picos_to_mclk(unsigned int picos)
{
unsigned long long clks, clks_rem;
+ unsigned long data_rate = get_ddr_freq(0);
/* Short circuit for zero picos */
if (!picos)
return 0;
/* First multiply the time by the data rate (32x32 => 64) */
- clks = picos * (unsigned long long)get_ddr_freq(0);
-
+ clks = picos * (unsigned long long)data_rate;
/*
* Now divide by 5^12 and track the 32-bit remainder, then divide
* by 2*(2^12) using shifts (and updating the remainder).
*/
clks_rem = do_div(clks, UL_5POW12);
- clks_rem <<= 13;
- clks_rem |= clks & (UL_2POW13-1);
+ clks_rem += (clks & (UL_2POW13-1)) * UL_5POW12;
clks >>= 13;
- /* If we had a remainder, then round up */
- if (clks_rem)
+ /* If we had a remainder greater than the 1ps error, then round up */
+ if (clks_rem > data_rate)
clks++;
/* Clamp to the maximum representable value */
@@ -133,10 +129,13 @@ fsl_ddr_set_lawbar(const common_timing_params_t *memctl_common_params,
void board_add_ram_info(int use_default)
{
-#if defined(CONFIG_MPC85xx)
- volatile ccsr_ddr_t *ddr = (void *)(CONFIG_SYS_MPC85xx_DDR_ADDR);
+#if defined(CONFIG_MPC83xx)
+ immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
+ ccsr_ddr_t *ddr = (void *)&immap->ddr;
+#elif defined(CONFIG_MPC85xx)
+ ccsr_ddr_t *ddr = (void *)(CONFIG_SYS_MPC85xx_DDR_ADDR);
#elif defined(CONFIG_MPC86xx)
- volatile ccsr_ddr_t *ddr = (void *)(CONFIG_SYS_MPC86xx_DDR_ADDR);
+ ccsr_ddr_t *ddr = (void *)(CONFIG_SYS_MPC86xx_DDR_ADDR);
#endif
#if (CONFIG_NUM_DDR_CONTROLLERS > 1)
uint32_t cs0_config = in_be32(&ddr->cs0_config);
generated by cgit v1.2.3 (git 2.0.4) at 2025-10-31 11:01:49 +0000