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fsl-ddr: clean up the ddr code for DDR3 controller

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- The DDR3 controller is expanding the bits for timing config
- Add the DDR3 32-bit bus mode support

Signed-off-by: Dave Liu <daveliu@freescale.com>
Acked-by: Andy Fleming <afleming@freescale.com>
This commit is contained in:
Dave Liu 2008-11-21 16:31:29 +08:00 committed by Andrew Fleming-AFLEMING
parent 80ee3ce6d7
commit 22ff3d0134
2 changed files with 16 additions and 11 deletions
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24
cpu/mpc8xxx/ddr/ctrl_regs.c
View File

@ -167,7 +167,7 @@ static void set_timing_cfg_0(fsl_ddr_cfg_regs_t *ddr)
| ((trrt_mclk & 0x3) << 26) /* RRT */
| ((twwt_mclk & 0x3) << 24) /* WWT */
| ((act_pd_exit_mclk & 0x7) << 20) /* ACT_PD_EXIT */
| ((pre_pd_exit_mclk & 0x7) << 16) /* PRE_PD_EXIT */
| ((pre_pd_exit_mclk & 0xF) << 16) /* PRE_PD_EXIT */
| ((taxpd_mclk & 0xf) << 8) /* ODT_PD_EXIT */
| ((tmrd_mclk & 0xf) << 0) /* MRS_CYC */
);
@ -313,13 +313,13 @@ static void set_timing_cfg_2(fsl_ddr_cfg_regs_t *ddr,
four_act = picos_to_mclk(popts->tFAW_window_four_activates_ps);
ddr->timing_cfg_2 = (0
| ((add_lat_mclk & 0x7) << 28)
| ((add_lat_mclk & 0xf) << 28)
| ((cpo & 0x1f) << 23)
| ((wr_lat & 0x7) << 19)
| ((wr_lat & 0xf) << 19)
| ((rd_to_pre & 0x7) << 13)
| ((wr_data_delay & 0x7) << 10)
| ((cke_pls & 0x7) << 6)
| ((four_act & 0x1f) << 0)
| ((four_act & 0x3f) << 0)
);
debug("FSLDDR: timing_cfg_2 = 0x%08x\n", ddr->timing_cfg_2);
}
@ -336,7 +336,7 @@ static void set_ddr_sdram_cfg(fsl_ddr_cfg_regs_t *ddr,
unsigned int sdram_type; /* Type of SDRAM */
unsigned int dyn_pwr; /* Dynamic power management mode */
unsigned int dbw; /* DRAM dta bus width */
unsigned int eight_be; /* 8-beat burst enable */
unsigned int eight_be = 0; /* 8-beat burst enable, DDR2 is zero */
unsigned int ncap = 0; /* Non-concurrent auto-precharge */
unsigned int threeT_en; /* Enable 3T timing */
unsigned int twoT_en; /* Enable 2T timing */
@ -363,7 +363,9 @@ static void set_ddr_sdram_cfg(fsl_ddr_cfg_regs_t *ddr,
dyn_pwr = popts->dynamic_power;
dbw = popts->data_bus_width;
eight_be = 0; /* always 0 for DDR2 */
/* DDR3 must use 8-beat bursts when using 32-bit bus mode */
if ((sdram_type == SDRAM_TYPE_DDR3) && (dbw == 0x1))
eight_be = 1;
threeT_en = popts->threeT_en;
twoT_en = popts->twoT_en;
ba_intlv_ctl = popts->ba_intlv_ctl;
@ -695,10 +697,10 @@ static void set_timing_cfg_5(fsl_ddr_cfg_regs_t *ddr)
unsigned int wodt_off = 0; /* Write to ODT off */
ddr->timing_cfg_5 = (0
| ((rodt_on & 0xf) << 24)
| ((rodt_off & 0xf) << 20)
| ((wodt_on & 0xf) << 12)
| ((wodt_off & 0xf) << 8)
| ((rodt_on & 0x1f) << 24)
| ((rodt_off & 0x7) << 20)
| ((wodt_on & 0x1f) << 12)
| ((wodt_off & 0x7) << 8)
);
debug("FSLDDR: timing_cfg_5 = 0x%08x\n", ddr->timing_cfg_5);
}
@ -748,7 +750,7 @@ static void set_ddr_wrlvl_cntl(fsl_ddr_cfg_regs_t *ddr)
| ((wrlvl_dqsen & 0x7) << 16)
| ((wrlvl_smpl & 0xf) << 12)
| ((wrlvl_wlr & 0x7) << 8)
| ((wrlvl_start & 0xF) << 0)
| ((wrlvl_start & 0x1F) << 0)
);
}

3
include/asm-ppc/fsl_ddr_sdram.h
View File

@ -34,7 +34,10 @@ typedef ddr2_spd_eeprom_t generic_spd_eeprom_t;
#elif defined(CONFIG_FSL_DDR3)
#define FSL_DDR_MIN_TCKE_PULSE_WIDTH_DDR (3) /* FIXME */
typedef ddr3_spd_eeprom_t generic_spd_eeprom_t;
#ifndef CONFIG_FSL_SDRAM_TYPE
#define CONFIG_FSL_SDRAM_TYPE SDRAM_TYPE_DDR3
#endif
#endif /* #if defined(CONFIG_FSL_DDR1) */
/* define bank(chip select) interleaving mode */
#define FSL_DDR_CS0_CS1 0x40