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u-boot/drivers/ddr/fsl/options.c
Simon Glass 00caae6d47 env: Rename getenv/_f() to env_get() 
We are now using an env_ prefix for environment functions. Rename these
two functions for consistency. Also add function comments in common.h.

Quite a few places use getenv() in a condition context, provoking a
warning from checkpatch. These are fixed up in this patch also.

Suggested-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>
2017-08-16 08:30:24 -04:00

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/*
* Copyright 2008, 2010-2014 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <hwconfig.h>
#include <fsl_ddr_sdram.h>
#include <fsl_ddr.h>
#if defined(CONFIG_FSL_LSCH2) || defined(CONFIG_FSL_LSCH3) || \
defined(CONFIG_ARM)
#include <asm/arch/clock.h>
#endif
/*
* Use our own stack based buffer before relocation to allow accessing longer
* hwconfig strings that might be in the environment before we've relocated.
* This is pretty fragile on both the use of stack and if the buffer is big
* enough. However we will get a warning from env_get_f() for the latter.
*/
/* Board-specific functions defined in each board's ddr.c */
extern void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num);
struct dynamic_odt {
unsigned int odt_rd_cfg;
unsigned int odt_wr_cfg;
unsigned int odt_rtt_norm;
unsigned int odt_rtt_wr;
};
#ifdef CONFIG_SYS_FSL_DDR4
/* Quad rank is not verified yet due availability.
* Replacing 20 OHM with 34 OHM since DDR4 doesn't have 20 OHM option
*/
static __maybe_unused const struct dynamic_odt single_Q[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS_AND_OTHER_DIMM,
DDR4_RTT_34_OHM, /* unverified */
DDR4_RTT_120_OHM
},
{ /* cs1 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_NEVER,
DDR4_RTT_OFF,
DDR4_RTT_120_OHM
},
{ /* cs2 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS_AND_OTHER_DIMM,
DDR4_RTT_34_OHM,
DDR4_RTT_120_OHM
},
{ /* cs3 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_NEVER, /* tied high */
DDR4_RTT_OFF,
DDR4_RTT_120_OHM
}
};
static __maybe_unused const struct dynamic_odt single_D[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_ALL,
DDR4_RTT_40_OHM,
DDR4_RTT_OFF
},
{ /* cs1 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_NEVER,
DDR4_RTT_OFF,
DDR4_RTT_OFF
},
{0, 0, 0, 0},
{0, 0, 0, 0}
};
static __maybe_unused const struct dynamic_odt single_S[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_ALL,
DDR4_RTT_40_OHM,
DDR4_RTT_OFF
},
{0, 0, 0, 0},
{0, 0, 0, 0},
{0, 0, 0, 0},
};
static __maybe_unused const struct dynamic_odt dual_DD[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
DDR4_RTT_120_OHM,
DDR4_RTT_OFF
},
{ /* cs1 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_OTHER_DIMM,
DDR4_RTT_34_OHM,
DDR4_RTT_OFF
},
{ /* cs2 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
DDR4_RTT_120_OHM,
DDR4_RTT_OFF
},
{ /* cs3 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_OTHER_DIMM,
DDR4_RTT_34_OHM,
DDR4_RTT_OFF
}
};
static __maybe_unused const struct dynamic_odt dual_DS[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
DDR4_RTT_120_OHM,
DDR4_RTT_OFF
},
{ /* cs1 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_OTHER_DIMM,
DDR4_RTT_34_OHM,
DDR4_RTT_OFF
},
{ /* cs2 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_ALL,
DDR4_RTT_34_OHM,
DDR4_RTT_120_OHM
},
{0, 0, 0, 0}
};
static __maybe_unused const struct dynamic_odt dual_SD[4] = {
{ /* cs0 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_ALL,
DDR4_RTT_34_OHM,
DDR4_RTT_120_OHM
},
{0, 0, 0, 0},
{ /* cs2 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
DDR4_RTT_120_OHM,
DDR4_RTT_OFF
},
{ /* cs3 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_OTHER_DIMM,
DDR4_RTT_34_OHM,
DDR4_RTT_OFF
}
};
static __maybe_unused const struct dynamic_odt dual_SS[4] = {
{ /* cs0 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_ALL,
DDR4_RTT_34_OHM,
DDR4_RTT_120_OHM
},
{0, 0, 0, 0},
{ /* cs2 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_ALL,
DDR4_RTT_34_OHM,
DDR4_RTT_120_OHM
},
{0, 0, 0, 0}
};
static __maybe_unused const struct dynamic_odt dual_D0[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
DDR4_RTT_40_OHM,
DDR4_RTT_OFF
},
{ /* cs1 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_NEVER,
DDR4_RTT_OFF,
DDR4_RTT_OFF
},
{0, 0, 0, 0},
{0, 0, 0, 0}
};
static __maybe_unused const struct dynamic_odt dual_0D[4] = {
{0, 0, 0, 0},
{0, 0, 0, 0},
{ /* cs2 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
DDR4_RTT_40_OHM,
DDR4_RTT_OFF
},
{ /* cs3 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_NEVER,
DDR4_RTT_OFF,
DDR4_RTT_OFF
}
};
static __maybe_unused const struct dynamic_odt dual_S0[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
DDR4_RTT_40_OHM,
DDR4_RTT_OFF
},
{0, 0, 0, 0},
{0, 0, 0, 0},
{0, 0, 0, 0}
};
static __maybe_unused const struct dynamic_odt dual_0S[4] = {
{0, 0, 0, 0},
{0, 0, 0, 0},
{ /* cs2 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
DDR4_RTT_40_OHM,
DDR4_RTT_OFF
},
{0, 0, 0, 0}
};
static __maybe_unused const struct dynamic_odt odt_unknown[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
DDR4_RTT_120_OHM,
DDR4_RTT_OFF
},
{ /* cs1 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
DDR4_RTT_120_OHM,
DDR4_RTT_OFF
},
{ /* cs2 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
DDR4_RTT_120_OHM,
DDR4_RTT_OFF
},
{ /* cs3 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
DDR4_RTT_120_OHM,
DDR4_RTT_OFF
}
};
#elif defined(CONFIG_SYS_FSL_DDR3)
static __maybe_unused const struct dynamic_odt single_Q[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS_AND_OTHER_DIMM,
DDR3_RTT_20_OHM,
DDR3_RTT_120_OHM
},
{ /* cs1 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_NEVER, /* tied high */
DDR3_RTT_OFF,
DDR3_RTT_120_OHM
},
{ /* cs2 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS_AND_OTHER_DIMM,
DDR3_RTT_20_OHM,
DDR3_RTT_120_OHM
},
{ /* cs3 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_NEVER, /* tied high */
DDR3_RTT_OFF,
DDR3_RTT_120_OHM
}
};
static __maybe_unused const struct dynamic_odt single_D[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_ALL,
DDR3_RTT_40_OHM,
DDR3_RTT_OFF
},
{ /* cs1 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_NEVER,
DDR3_RTT_OFF,
DDR3_RTT_OFF
},
{0, 0, 0, 0},
{0, 0, 0, 0}
};
static __maybe_unused const struct dynamic_odt single_S[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_ALL,
DDR3_RTT_40_OHM,
DDR3_RTT_OFF
},
{0, 0, 0, 0},
{0, 0, 0, 0},
{0, 0, 0, 0},
};
static __maybe_unused const struct dynamic_odt dual_DD[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
DDR3_RTT_120_OHM,
DDR3_RTT_OFF
},
{ /* cs1 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_OTHER_DIMM,
DDR3_RTT_30_OHM,
DDR3_RTT_OFF
},
{ /* cs2 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
DDR3_RTT_120_OHM,
DDR3_RTT_OFF
},
{ /* cs3 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_OTHER_DIMM,
DDR3_RTT_30_OHM,
DDR3_RTT_OFF
}
};
static __maybe_unused const struct dynamic_odt dual_DS[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
DDR3_RTT_120_OHM,
DDR3_RTT_OFF
},
{ /* cs1 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_OTHER_DIMM,
DDR3_RTT_30_OHM,
DDR3_RTT_OFF
},
{ /* cs2 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_ALL,
DDR3_RTT_20_OHM,
DDR3_RTT_120_OHM
},
{0, 0, 0, 0}
};
static __maybe_unused const struct dynamic_odt dual_SD[4] = {
{ /* cs0 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_ALL,
DDR3_RTT_20_OHM,
DDR3_RTT_120_OHM
},
{0, 0, 0, 0},
{ /* cs2 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
DDR3_RTT_120_OHM,
DDR3_RTT_OFF
},
{ /* cs3 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_OTHER_DIMM,
DDR3_RTT_20_OHM,
DDR3_RTT_OFF
}
};
static __maybe_unused const struct dynamic_odt dual_SS[4] = {
{ /* cs0 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_ALL,
DDR3_RTT_30_OHM,
DDR3_RTT_120_OHM
},
{0, 0, 0, 0},
{ /* cs2 */
FSL_DDR_ODT_OTHER_DIMM,
FSL_DDR_ODT_ALL,
DDR3_RTT_30_OHM,
DDR3_RTT_120_OHM
},
{0, 0, 0, 0}
};
static __maybe_unused const struct dynamic_odt dual_D0[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
DDR3_RTT_40_OHM,
DDR3_RTT_OFF
},
{ /* cs1 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_NEVER,
DDR3_RTT_OFF,
DDR3_RTT_OFF
},
{0, 0, 0, 0},
{0, 0, 0, 0}
};
static __maybe_unused const struct dynamic_odt dual_0D[4] = {
{0, 0, 0, 0},
{0, 0, 0, 0},
{ /* cs2 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_SAME_DIMM,
DDR3_RTT_40_OHM,
DDR3_RTT_OFF
},
{ /* cs3 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_NEVER,
DDR3_RTT_OFF,
DDR3_RTT_OFF
}
};
static __maybe_unused const struct dynamic_odt dual_S0[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
DDR3_RTT_40_OHM,
DDR3_RTT_OFF
},
{0, 0, 0, 0},
{0, 0, 0, 0},
{0, 0, 0, 0}
};
static __maybe_unused const struct dynamic_odt dual_0S[4] = {
{0, 0, 0, 0},
{0, 0, 0, 0},
{ /* cs2 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
DDR3_RTT_40_OHM,
DDR3_RTT_OFF
},
{0, 0, 0, 0}
};
static __maybe_unused const struct dynamic_odt odt_unknown[4] = {
{ /* cs0 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
DDR3_RTT_120_OHM,
DDR3_RTT_OFF
},
{ /* cs1 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
DDR3_RTT_120_OHM,
DDR3_RTT_OFF
},
{ /* cs2 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
DDR3_RTT_120_OHM,
DDR3_RTT_OFF
},
{ /* cs3 */
FSL_DDR_ODT_NEVER,
FSL_DDR_ODT_CS,
DDR3_RTT_120_OHM,
DDR3_RTT_OFF
}
};
#else /* CONFIG_SYS_FSL_DDR3 */
static __maybe_unused const struct dynamic_odt single_Q[4] = {
{0, 0, 0, 0},
{0, 0, 0, 0},
{0, 0, 0, 0},
{0, 0, 0, 0}
};
static __maybe_unused 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 __maybe_unused 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 __maybe_unused 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 __maybe_unused 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 __maybe_unused 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 __maybe_unused 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 __maybe_unused 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 __maybe_unused 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 __maybe_unused 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 __maybe_unused 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 __maybe_unused 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
/*
* Automatically seleect bank interleaving mode based on DIMMs
* in this order: cs0_cs1_cs2_cs3, cs0_cs1, null.
* This function only deal with one or two slots per controller.
*/
static inline unsigned int auto_bank_intlv(dimm_params_t *pdimm)
{
#if (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
if (pdimm[0].n_ranks == 4)
return FSL_DDR_CS0_CS1_CS2_CS3;
else if (pdimm[0].n_ranks == 2)
return FSL_DDR_CS0_CS1;
#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
#ifdef CONFIG_FSL_DDR_FIRST_SLOT_QUAD_CAPABLE
if (pdimm[0].n_ranks == 4)
return FSL_DDR_CS0_CS1_CS2_CS3;
#endif
if (pdimm[0].n_ranks == 2) {
if (pdimm[1].n_ranks == 2)
return FSL_DDR_CS0_CS1_CS2_CS3;
else
return FSL_DDR_CS0_CS1;
}
#endif
return 0;
}
unsigned int populate_memctl_options(const common_timing_params_t *common_dimm,
memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
{
unsigned int i;
char buffer[HWCONFIG_BUFFER_SIZE];
char *buf = NULL;
#if defined(CONFIG_SYS_FSL_DDR3) || \
defined(CONFIG_SYS_FSL_DDR2) || \
defined(CONFIG_SYS_FSL_DDR4)
const struct dynamic_odt *pdodt = odt_unknown;
#endif
ulong ddr_freq;
/*
* Extract hwconfig from environment since we have not properly setup
* the environment but need it for ddr config params
*/
if (env_get_f("hwconfig", buffer, sizeof(buffer)) > 0)
buf = buffer;
#if defined(CONFIG_SYS_FSL_DDR3) || \
defined(CONFIG_SYS_FSL_DDR2) || \
defined(CONFIG_SYS_FSL_DDR4)
/* Chip select options. */
#if (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
switch (pdimm[0].n_ranks) {
case 1:
pdodt = single_S;
break;
case 2:
pdodt = single_D;
break;
case 4:
pdodt = single_Q;
break;
}
#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
switch (pdimm[0].n_ranks) {
#ifdef CONFIG_FSL_DDR_FIRST_SLOT_QUAD_CAPABLE
case 4:
pdodt = single_Q;
if (pdimm[1].n_ranks)
printf("Error: Quad- and Dual-rank DIMMs cannot be used together\n");
break;
#endif
case 2:
switch (pdimm[1].n_ranks) {
case 2:
pdodt = dual_DD;
break;
case 1:
pdodt = dual_DS;
break;
case 0:
pdodt = dual_D0;
break;
}
break;
case 1:
switch (pdimm[1].n_ranks) {
case 2:
pdodt = dual_SD;
break;
case 1:
pdodt = dual_SS;
break;
case 0:
pdodt = dual_S0;
break;
}
break;
case 0:
switch (pdimm[1].n_ranks) {
case 2:
pdodt = dual_0D;
break;
case 1:
pdodt = dual_0S;
break;
}
break;
}
#endif /* CONFIG_DIMM_SLOTS_PER_CTLR */
#endif /* CONFIG_SYS_FSL_DDR2, 3, 4 */
/* Pick chip-select local options. */
for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
#if defined(CONFIG_SYS_FSL_DDR3) || \
defined(CONFIG_SYS_FSL_DDR2) || \
defined(CONFIG_SYS_FSL_DDR4)
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;
popts->cs_local_opts[i].odt_rtt_wr = pdodt[i].odt_rtt_wr;
#else
popts->cs_local_opts[i].odt_rd_cfg = FSL_DDR_ODT_NEVER;
popts->cs_local_opts[i].odt_wr_cfg = FSL_DDR_ODT_CS;
#endif
popts->cs_local_opts[i].auto_precharge = 0;
}
/* Pick interleaving mode. */
/*
* 0 = no interleaving
* 1 = interleaving between 2 controllers
*/
popts->memctl_interleaving = 0;
/*
* 0 = cacheline
* 1 = page
* 2 = (logical) bank
* 3 = superbank (only if CS interleaving is enabled)
*/
popts->memctl_interleaving_mode = 0;
/*
* 0: cacheline: bit 30 of the 36-bit physical addr selects the memctl
* 1: page: bit to the left of the column bits selects the memctl
* 2: bank: bit to the left of the bank bits selects the memctl
* 3: superbank: bit to the left of the chip select selects the memctl
*
* NOTE: ba_intlv (rank interleaving) is independent of memory
* controller interleaving; it is only within a memory controller.
* Must use superbank interleaving if rank interleaving is used and
* memory controller interleaving is enabled.
*/
/*
* 0 = no
* 0x40 = CS0,CS1
* 0x20 = CS2,CS3
* 0x60 = CS0,CS1 + CS2,CS3
* 0x04 = CS0,CS1,CS2,CS3
*/
popts->ba_intlv_ctl = 0;
/* Memory Organization Parameters */
popts->registered_dimm_en = common_dimm->all_dimms_registered;
/* Operational Mode Paramters */
/* Pick ECC modes */
popts->ecc_mode = 0; /* 0 = disabled, 1 = enabled */
#ifdef CONFIG_DDR_ECC
if (hwconfig_sub_f("fsl_ddr", "ecc", buf)) {
if (hwconfig_subarg_cmp_f("fsl_ddr", "ecc", "on", buf))
popts->ecc_mode = 1;
} else
popts->ecc_mode = 1;
#endif
/* 1 = use memory controler to init data */
popts->ecc_init_using_memctl = popts->ecc_mode ? 1 : 0;
/*
* Choose DQS config
* 0 for DDR1
* 1 for DDR2
*/
#if defined(CONFIG_SYS_FSL_DDR1)
popts->dqs_config = 0;
#elif defined(CONFIG_SYS_FSL_DDR2) || defined(CONFIG_SYS_FSL_DDR3)
popts->dqs_config = 1;
#endif
/* Choose self-refresh during sleep. */
popts->self_refresh_in_sleep = 1;
/* Choose dynamic power management mode. */
popts->dynamic_power = 0;
/*
* check first dimm for primary sdram width
* presuming all dimms are similar
* 0 = 64-bit, 1 = 32-bit, 2 = 16-bit
*/
#if defined(CONFIG_SYS_FSL_DDR1) || defined(CONFIG_SYS_FSL_DDR2)
if (pdimm[0].n_ranks != 0) {
if ((pdimm[0].data_width >= 64) && \
(pdimm[0].data_width <= 72))
popts->data_bus_width = 0;
else if ((pdimm[0].data_width >= 32) && \
(pdimm[0].data_width <= 40))
popts->data_bus_width = 1;
else {
panic("Error: data width %u is invalid!\n",
pdimm[0].data_width);
}
}
#else
if (pdimm[0].n_ranks != 0) {
if (pdimm[0].primary_sdram_width == 64)
popts->data_bus_width = 0;
else if (pdimm[0].primary_sdram_width == 32)
popts->data_bus_width = 1;
else if (pdimm[0].primary_sdram_width == 16)
popts->data_bus_width = 2;
else {
panic("Error: primary sdram width %u is invalid!\n",
pdimm[0].primary_sdram_width);
}
}
#endif
popts->x4_en = (pdimm[0].device_width == 4) ? 1 : 0;
/* Choose burst length. */
#if defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
#if defined(CONFIG_E500MC)
popts->otf_burst_chop_en = 0; /* on-the-fly burst chop disable */
popts->burst_length = DDR_BL8; /* Fixed 8-beat burst len */
#else
if ((popts->data_bus_width == 1) || (popts->data_bus_width == 2)) {
/* 32-bit or 16-bit bus */
popts->otf_burst_chop_en = 0;
popts->burst_length = DDR_BL8;
} else {
popts->otf_burst_chop_en = 1; /* on-the-fly burst chop */
popts->burst_length = DDR_OTF; /* on-the-fly BC4 and BL8 */
}
#endif
#else
popts->burst_length = DDR_BL4; /* has to be 4 for DDR2 */
#endif
/* Choose ddr controller address mirror mode */
#if defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
if (pdimm[i].n_ranks) {
popts->mirrored_dimm = pdimm[i].mirrored_dimm;
break;
}
}
#endif
/* Global Timing Parameters. */
debug("mclk_ps = %u ps\n", get_memory_clk_period_ps(ctrl_num));
/* Pick a caslat override. */
popts->cas_latency_override = 0;
popts->cas_latency_override_value = 3;
if (popts->cas_latency_override) {
debug("using caslat override value = %u\n",
popts->cas_latency_override_value);
}
/* Decide whether to use the computed derated latency */
popts->use_derated_caslat = 0;
/* Choose an additive latency. */
popts->additive_latency_override = 0;
popts->additive_latency_override_value = 3;
if (popts->additive_latency_override) {
debug("using additive latency override value = %u\n",
popts->additive_latency_override_value);
}
/*
* 2T_EN setting
*
* Factors to consider for 2T_EN:
* - number of DIMMs installed
* - number of components, number of active ranks
* - how much time you want to spend playing around
*/
popts->twot_en = 0;
popts->threet_en = 0;
/* for RDIMM and DDR4 UDIMM/discrete memory, address parity enable */
if (popts->registered_dimm_en)
popts->ap_en = 1; /* 0 = disable, 1 = enable */
else
popts->ap_en = 0; /* disabled for DDR4 UDIMM/discrete default */
if (hwconfig_sub_f("fsl_ddr", "parity", buf)) {
if (hwconfig_subarg_cmp_f("fsl_ddr", "parity", "on", buf)) {
if (popts->registered_dimm_en ||
(CONFIG_FSL_SDRAM_TYPE == SDRAM_TYPE_DDR4))
popts->ap_en = 1;
}
}
/*
* BSTTOPRE precharge interval
*
* Set this to 0 for global auto precharge
* The value of 0x100 has been used for DDR1, DDR2, DDR3.
* It is not wrong. Any value should be OK. The performance depends on
* applications. There is no one good value for all. One way to set
* is to use 1/4 of refint value.
*/
popts->bstopre = picos_to_mclk(ctrl_num, common_dimm->refresh_rate_ps)
>> 2;
/*
* Window for four activates -- tFAW
*
* FIXME: UM: applies only to DDR2/DDR3 with eight logical banks only
* FIXME: varies depending upon number of column addresses or data
* FIXME: width, was considering looking at pdimm->primary_sdram_width
*/
#if defined(CONFIG_SYS_FSL_DDR1)
popts->tfaw_window_four_activates_ps = mclk_to_picos(ctrl_num, 1);
#elif defined(CONFIG_SYS_FSL_DDR2)
/*
* x4/x8; some datasheets have 35000
* x16 wide columns only? Use 50000?
*/
popts->tfaw_window_four_activates_ps = 37500;
#else
popts->tfaw_window_four_activates_ps = pdimm[0].tfaw_ps;
#endif
popts->zq_en = 0;
popts->wrlvl_en = 0;
#if defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
/*
* due to ddr3 dimm is fly-by topology
* we suggest to enable write leveling to
* meet the tQDSS under different loading.
*/
popts->wrlvl_en = 1;
popts->zq_en = 1;
popts->wrlvl_override = 0;
#endif
/*
* Check interleaving configuration from environment.
* Please refer to doc/README.fsl-ddr for the detail.
*
* If memory controller interleaving is enabled, then the data
* bus widths must be programmed identically for all memory controllers.
*
* Attempt to set all controllers to the same chip select
* interleaving mode. It will do a best effort to get the
* requested ranks interleaved together such that the result
* should be a subset of the requested configuration.
*
* if CONFIG_SYS_FSL_DDR_INTLV_256B is defined, mandatory interleaving
* with 256 Byte is enabled.
*/
#if (CONFIG_SYS_NUM_DDR_CTLRS > 1)
if (!hwconfig_sub_f("fsl_ddr", "ctlr_intlv", buf))
#ifdef CONFIG_SYS_FSL_DDR_INTLV_256B
;
#else
goto done;
#endif
if (pdimm[0].n_ranks == 0) {
printf("There is no rank on CS0 for controller %d.\n", ctrl_num);
popts->memctl_interleaving = 0;
goto done;
}
popts->memctl_interleaving = 1;
#ifdef CONFIG_SYS_FSL_DDR_INTLV_256B
popts->memctl_interleaving_mode = FSL_DDR_256B_INTERLEAVING;
popts->memctl_interleaving = 1;
debug("256 Byte interleaving\n");
#else
/*
* test null first. if CONFIG_HWCONFIG is not defined
* hwconfig_arg_cmp returns non-zero
*/
if (hwconfig_subarg_cmp_f("fsl_ddr", "ctlr_intlv",
"null", buf)) {
popts->memctl_interleaving = 0;
debug("memory controller interleaving disabled.\n");
} else if (hwconfig_subarg_cmp_f("fsl_ddr",
"ctlr_intlv",
"cacheline", buf)) {
popts->memctl_interleaving_mode =
((CONFIG_SYS_NUM_DDR_CTLRS == 3) && ctrl_num == 2) ?
0 : FSL_DDR_CACHE_LINE_INTERLEAVING;
popts->memctl_interleaving =
((CONFIG_SYS_NUM_DDR_CTLRS == 3) && ctrl_num == 2) ?
0 : 1;
} else if (hwconfig_subarg_cmp_f("fsl_ddr",
"ctlr_intlv",
"page", buf)) {
popts->memctl_interleaving_mode =
((CONFIG_SYS_NUM_DDR_CTLRS == 3) && ctrl_num == 2) ?
0 : FSL_DDR_PAGE_INTERLEAVING;
popts->memctl_interleaving =
((CONFIG_SYS_NUM_DDR_CTLRS == 3) && ctrl_num == 2) ?
0 : 1;
} else if (hwconfig_subarg_cmp_f("fsl_ddr",
"ctlr_intlv",
"bank", buf)) {
popts->memctl_interleaving_mode =
((CONFIG_SYS_NUM_DDR_CTLRS == 3) && ctrl_num == 2) ?
0 : FSL_DDR_BANK_INTERLEAVING;
popts->memctl_interleaving =
((CONFIG_SYS_NUM_DDR_CTLRS == 3) && ctrl_num == 2) ?
0 : 1;
} else if (hwconfig_subarg_cmp_f("fsl_ddr",
"ctlr_intlv",
"superbank", buf)) {
popts->memctl_interleaving_mode =
((CONFIG_SYS_NUM_DDR_CTLRS == 3) && ctrl_num == 2) ?
0 : FSL_DDR_SUPERBANK_INTERLEAVING;
popts->memctl_interleaving =
((CONFIG_SYS_NUM_DDR_CTLRS == 3) && ctrl_num == 2) ?
0 : 1;
#if (CONFIG_SYS_NUM_DDR_CTLRS == 3)
} else if (hwconfig_subarg_cmp_f("fsl_ddr",
"ctlr_intlv",
"3way_1KB", buf)) {
popts->memctl_interleaving_mode =
FSL_DDR_3WAY_1KB_INTERLEAVING;
} else if (hwconfig_subarg_cmp_f("fsl_ddr",
"ctlr_intlv",
"3way_4KB", buf)) {
popts->memctl_interleaving_mode =
FSL_DDR_3WAY_4KB_INTERLEAVING;
} else if (hwconfig_subarg_cmp_f("fsl_ddr",
"ctlr_intlv",
"3way_8KB", buf)) {
popts->memctl_interleaving_mode =
FSL_DDR_3WAY_8KB_INTERLEAVING;
#elif (CONFIG_SYS_NUM_DDR_CTLRS == 4)
} else if (hwconfig_subarg_cmp_f("fsl_ddr",
"ctlr_intlv",
"4way_1KB", buf)) {
popts->memctl_interleaving_mode =
FSL_DDR_4WAY_1KB_INTERLEAVING;
} else if (hwconfig_subarg_cmp_f("fsl_ddr",
"ctlr_intlv",
"4way_4KB", buf)) {
popts->memctl_interleaving_mode =
FSL_DDR_4WAY_4KB_INTERLEAVING;
} else if (hwconfig_subarg_cmp_f("fsl_ddr",
"ctlr_intlv",
"4way_8KB", buf)) {
popts->memctl_interleaving_mode =
FSL_DDR_4WAY_8KB_INTERLEAVING;
#endif
} else {
popts->memctl_interleaving = 0;
printf("hwconfig has unrecognized parameter for ctlr_intlv.\n");
}
#endif /* CONFIG_SYS_FSL_DDR_INTLV_256B */
done:
#endif /* CONFIG_SYS_NUM_DDR_CTLRS > 1 */
if ((hwconfig_sub_f("fsl_ddr", "bank_intlv", buf)) &&
(CONFIG_CHIP_SELECTS_PER_CTRL > 1)) {
/* test null first. if CONFIG_HWCONFIG is not defined,
* hwconfig_subarg_cmp_f returns non-zero */
if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv",
"null", buf))
debug("bank interleaving disabled.\n");
else if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv",
"cs0_cs1", buf))
popts->ba_intlv_ctl = FSL_DDR_CS0_CS1;
else if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv",
"cs2_cs3", buf))
popts->ba_intlv_ctl = FSL_DDR_CS2_CS3;
else if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv",
"cs0_cs1_and_cs2_cs3", buf))
popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_AND_CS2_CS3;
else if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv",
"cs0_cs1_cs2_cs3", buf))
popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_CS2_CS3;
else if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv",
"auto", buf))
popts->ba_intlv_ctl = auto_bank_intlv(pdimm);
else
printf("hwconfig has unrecognized parameter for bank_intlv.\n");
switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
case FSL_DDR_CS0_CS1_CS2_CS3:
#if (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
if (pdimm[0].n_ranks < 4) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(chip-select) for "
"CS0+CS1+CS2+CS3 on controller %d, "
"interleaving disabled!\n", ctrl_num);
}
#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
#ifdef CONFIG_FSL_DDR_FIRST_SLOT_QUAD_CAPABLE
if (pdimm[0].n_ranks == 4)
break;
#endif
if ((pdimm[0].n_ranks < 2) && (pdimm[1].n_ranks < 2)) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(chip-select) for "
"CS0+CS1+CS2+CS3 on controller %d, "
"interleaving disabled!\n", ctrl_num);
}
if (pdimm[0].capacity != pdimm[1].capacity) {
popts->ba_intlv_ctl = 0;
printf("Not identical DIMM size for "
"CS0+CS1+CS2+CS3 on controller %d, "
"interleaving disabled!\n", ctrl_num);
}
#endif
break;
case FSL_DDR_CS0_CS1:
if (pdimm[0].n_ranks < 2) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(chip-select) for "
"CS0+CS1 on controller %d, "
"interleaving disabled!\n", ctrl_num);
}
break;
case FSL_DDR_CS2_CS3:
#if (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
if (pdimm[0].n_ranks < 4) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(chip-select) for CS2+CS3 "
"on controller %d, interleaving disabled!\n", ctrl_num);
}
#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
if (pdimm[1].n_ranks < 2) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(chip-select) for CS2+CS3 "
"on controller %d, interleaving disabled!\n", ctrl_num);
}
#endif
break;
case FSL_DDR_CS0_CS1_AND_CS2_CS3:
#if (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
if (pdimm[0].n_ranks < 4) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(CS) for CS0+CS1 and "
"CS2+CS3 on controller %d, "
"interleaving disabled!\n", ctrl_num);
}
#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
if ((pdimm[0].n_ranks < 2) || (pdimm[1].n_ranks < 2)) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(CS) for CS0+CS1 and "
"CS2+CS3 on controller %d, "
"interleaving disabled!\n", ctrl_num);
}
#endif
break;
default:
popts->ba_intlv_ctl = 0;
break;
}
}
if (hwconfig_sub_f("fsl_ddr", "addr_hash", buf)) {
if (hwconfig_subarg_cmp_f("fsl_ddr", "addr_hash", "null", buf))
popts->addr_hash = 0;
else if (hwconfig_subarg_cmp_f("fsl_ddr", "addr_hash",
"true", buf))
popts->addr_hash = 1;
}
if (pdimm[0].n_ranks == 4)
popts->quad_rank_present = 1;
ddr_freq = get_ddr_freq(ctrl_num) / 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;
}
void check_interleaving_options(fsl_ddr_info_t *pinfo)
{
int i, j, k, check_n_ranks, intlv_invalid = 0;
unsigned int check_intlv, check_n_row_addr, check_n_col_addr;
unsigned long long check_rank_density;
struct dimm_params_s *dimm;
int first_ctrl = pinfo->first_ctrl;
int last_ctrl = first_ctrl + pinfo->num_ctrls - 1;
/*
* Check if all controllers are configured for memory
* controller interleaving. Identical dimms are recommended. At least
* the size, row and col address should be checked.
*/
j = 0;
check_n_ranks = pinfo->dimm_params[first_ctrl][0].n_ranks;
check_rank_density = pinfo->dimm_params[first_ctrl][0].rank_density;
check_n_row_addr = pinfo->dimm_params[first_ctrl][0].n_row_addr;
check_n_col_addr = pinfo->dimm_params[first_ctrl][0].n_col_addr;
check_intlv = pinfo->memctl_opts[first_ctrl].memctl_interleaving_mode;
for (i = first_ctrl; i <= last_ctrl; i++) {
dimm = &pinfo->dimm_params[i][0];
if (!pinfo->memctl_opts[i].memctl_interleaving) {
continue;
} else if (((check_rank_density != dimm->rank_density) ||
(check_n_ranks != dimm->n_ranks) ||
(check_n_row_addr != dimm->n_row_addr) ||
(check_n_col_addr != dimm->n_col_addr) ||
(check_intlv !=
pinfo->memctl_opts[i].memctl_interleaving_mode))){
intlv_invalid = 1;
break;
} else {
j++;
}
}
if (intlv_invalid) {
for (i = first_ctrl; i <= last_ctrl; i++)
pinfo->memctl_opts[i].memctl_interleaving = 0;
printf("Not all DIMMs are identical. "
"Memory controller interleaving disabled.\n");
} else {
switch (check_intlv) {
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:
#if (3 == CONFIG_SYS_NUM_DDR_CTLRS)
k = 2;
#else
k = CONFIG_SYS_NUM_DDR_CTLRS;
#endif
break;
case FSL_DDR_3WAY_1KB_INTERLEAVING:
case FSL_DDR_3WAY_4KB_INTERLEAVING:
case FSL_DDR_3WAY_8KB_INTERLEAVING:
case FSL_DDR_4WAY_1KB_INTERLEAVING:
case FSL_DDR_4WAY_4KB_INTERLEAVING:
case FSL_DDR_4WAY_8KB_INTERLEAVING:
default:
k = CONFIG_SYS_NUM_DDR_CTLRS;
break;
}
debug("%d of %d controllers are interleaving.\n", j, k);
if (j && (j != k)) {
for (i = first_ctrl; i <= last_ctrl; i++)
pinfo->memctl_opts[i].memctl_interleaving = 0;
if ((last_ctrl - first_ctrl) > 1)
puts("Not all controllers have compatible interleaving mode. All disabled.\n");
}
}
debug("Checking interleaving options completed\n");
}
int fsl_use_spd(void)
{
int use_spd = 0;
#ifdef CONFIG_DDR_SPD
char buffer[HWCONFIG_BUFFER_SIZE];
char *buf = NULL;
/*
* Extract hwconfig from environment since we have not properly setup
* the environment but need it for ddr config params
*/
if (env_get_f("hwconfig", buffer, sizeof(buffer)) > 0)
buf = buffer;
/* if hwconfig is not enabled, or "sdram" is not defined, use spd */
if (hwconfig_sub_f("fsl_ddr", "sdram", buf)) {
if (hwconfig_subarg_cmp_f("fsl_ddr", "sdram", "spd", buf))
use_spd = 1;
else if (hwconfig_subarg_cmp_f("fsl_ddr", "sdram",
"fixed", buf))
use_spd = 0;
else
use_spd = 1;
} else
use_spd = 1;
#endif
return use_spd;
}
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