diff options
author | Stefan Roese <sr@denx.de> | 2007-08-14 16:36:29 +0200 |
---|---|---|
committer | Stefan Roese <sr@denx.de> | 2007-08-14 16:36:29 +0200 |
commit | 3b3bff4cbf2cb14f9a3e7d03f26ebab900efe4ae (patch) | |
tree | fb66bf8861d9f78765160d734a438856f5317cdb /cpu/mpc85xx/spd_sdram.c | |
parent | 4ce846ec59f36b85d6644a769690ad3feb667575 (diff) | |
parent | 4ef35e53c693556c54b0c22d6f873de87bade253 (diff) | |
download | u-boot-imx-3b3bff4cbf2cb14f9a3e7d03f26ebab900efe4ae.zip u-boot-imx-3b3bff4cbf2cb14f9a3e7d03f26ebab900efe4ae.tar.gz u-boot-imx-3b3bff4cbf2cb14f9a3e7d03f26ebab900efe4ae.tar.bz2 |
Merge with git://www.denx.de/git/u-boot.git
Diffstat (limited to 'cpu/mpc85xx/spd_sdram.c')
-rw-r--r-- | cpu/mpc85xx/spd_sdram.c | 67 |
1 files changed, 58 insertions, 9 deletions
diff --git a/cpu/mpc85xx/spd_sdram.c b/cpu/mpc85xx/spd_sdram.c index 3777f49..5dc223a 100644 --- a/cpu/mpc85xx/spd_sdram.c +++ b/cpu/mpc85xx/spd_sdram.c @@ -1,5 +1,5 @@ /* - * Copyright 2004 Freescale Semiconductor. + * Copyright 2004, 2007 Freescale Semiconductor. * (C) Copyright 2003 Motorola Inc. * Xianghua Xiao (X.Xiao@motorola.com) * @@ -173,11 +173,10 @@ spd_sdram(void) { volatile immap_t *immap = (immap_t *)CFG_IMMR; volatile ccsr_ddr_t *ddr = &immap->im_ddr; - volatile ccsr_gur_t *gur = &immap->im_gur; spd_eeprom_t spd; unsigned int n_ranks; unsigned int rank_density; - unsigned int odt_rd_cfg, odt_wr_cfg; + unsigned int odt_rd_cfg, odt_wr_cfg, ba_bits; unsigned int odt_cfg, mode_odt_enable; unsigned int refresh_clk; #ifdef MPC85xx_DDR_SDRAM_CLK_CNTL @@ -189,7 +188,7 @@ spd_sdram(void) unsigned int max_data_rate, effective_data_rate; unsigned int busfreq; unsigned sdram_cfg; - unsigned int memsize; + unsigned int memsize = 0; unsigned char caslat, caslat_ctrl; unsigned int trfc, trfc_clk, trfc_low, trfc_high; unsigned int trcd_clk; @@ -204,6 +203,46 @@ spd_sdram(void) unsigned int mode_caslat; unsigned char sdram_type; unsigned char d_init; + unsigned int bnds; + + /* + * Skip configuration if already configured. + * memsize is determined from last configured chip select. + */ + if (ddr->cs0_config & 0x80000000) { + debug(" cs0 already configured, bnds=%x\n",ddr->cs0_bnds); + bnds = 0xfff & ddr->cs0_bnds; + if (bnds < 0xff) { /* do not add if at top of 4G */ + memsize = (bnds + 1) << 4; + } + } + if (ddr->cs1_config & 0x80000000) { + debug(" cs1 already configured, bnds=%x\n",ddr->cs1_bnds); + bnds = 0xfff & ddr->cs1_bnds; + if (bnds < 0xff) { /* do not add if at top of 4G */ + memsize = (bnds + 1) << 4; /* assume ordered bnds */ + } + } + if (ddr->cs2_config & 0x80000000) { + debug(" cs2 already configured, bnds=%x\n",ddr->cs2_bnds); + bnds = 0xfff & ddr->cs2_bnds; + if (bnds < 0xff) { /* do not add if at top of 4G */ + memsize = (bnds + 1) << 4; + } + } + if (ddr->cs3_config & 0x80000000) { + debug(" cs3 already configured, bnds=%x\n",ddr->cs3_bnds); + bnds = 0xfff & ddr->cs3_bnds; + if (bnds < 0xff) { /* do not add if at top of 4G */ + memsize = (bnds + 1) << 4; + } + } + + if (memsize) { + printf(" Reusing current %dMB configuration\n",memsize); + memsize = setup_laws_and_tlbs(memsize); + return memsize << 20; + } /* * Read SPD information. @@ -262,6 +301,7 @@ spd_sdram(void) return 0; } +#ifdef CONFIG_MPC8548 /* * Adjust DDR II IO voltage biasing. * Only 8548 rev 1 needs the fix @@ -269,9 +309,11 @@ spd_sdram(void) if ((SVR_VER(get_svr()) == SVR_8548_E) && (SVR_MJREV(get_svr()) == 1) && (spd.mem_type == SPD_MEMTYPE_DDR2)) { + volatile ccsr_gur_t *gur = &immap->im_gur; gur->ddrioovcr = (0x80000000 /* Enable */ | 0x10000000);/* VSEL to 1.8V */ } +#endif /* * Determine the size of each Rank in bytes. @@ -299,9 +341,14 @@ spd_sdram(void) #endif } + ba_bits = 0; + if (spd.nbanks == 0x8) + ba_bits = 1; + ddr->cs0_config = ( 1 << 31 | (odt_rd_cfg << 20) | (odt_wr_cfg << 16) + | (ba_bits << 14) | (spd.nrow_addr - 12) << 8 | (spd.ncol_addr - 8) ); debug("\n"); @@ -645,13 +692,10 @@ spd_sdram(void) */ cpo = 0; if (spd.mem_type == SPD_MEMTYPE_DDR2) { - if (effective_data_rate == 266 || effective_data_rate == 333) { + if (effective_data_rate <= 333) { cpo = 0x7; /* READ_LAT + 5/4 */ - } else if (effective_data_rate == 400) { - cpo = 0x9; /* READ_LAT + 7/4 */ } else { - /* Pure speculation */ - cpo = 0xb; + cpo = 0x9; /* READ_LAT + 7/4 */ } } @@ -858,7 +902,12 @@ spd_sdram(void) if (spd.mem_type == SPD_MEMTYPE_DDR) clk_adjust = 0x6; else +#ifdef CONFIG_MPC8568 + /* Empirally setting clk_adjust */ + clk_adjust = 0x6; +#else clk_adjust = 0x7; +#endif ddr->sdram_clk_cntl = (0 | 0x80000000 |