| Kumar Gala | 2a6c2d7 | 2008-08-26 21:34:55 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2008 Freescale Semiconductor, Inc. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * Version 2 as published by the Free Software Foundation. |
| 7 | */ |
| 8 | |
| 9 | #include <common.h> |
| 10 | #include <asm/io.h> |
| 11 | #include <asm/fsl_ddr_sdram.h> |
| 12 | |
| 13 | #if (CONFIG_CHIP_SELECTS_PER_CTRL > 4) |
| 14 | #error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL |
| 15 | #endif |
| 16 | |
| 17 | void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, |
| 18 | unsigned int ctrl_num) |
| 19 | { |
| 20 | unsigned int i; |
| 21 | volatile ccsr_ddr_t *ddr = (void *)CFG_MPC85xx_DDR_ADDR; |
| 22 | |
| 23 | if (ctrl_num) { |
| 24 | printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num); |
| 25 | return; |
| 26 | } |
| 27 | |
| 28 | for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { |
| 29 | if (i == 0) { |
| 30 | out_be32(&ddr->cs0_bnds, regs->cs[i].bnds); |
| 31 | out_be32(&ddr->cs0_config, regs->cs[i].config); |
| 32 | |
| 33 | } else if (i == 1) { |
| 34 | out_be32(&ddr->cs1_bnds, regs->cs[i].bnds); |
| 35 | out_be32(&ddr->cs1_config, regs->cs[i].config); |
| 36 | |
| 37 | } else if (i == 2) { |
| 38 | out_be32(&ddr->cs2_bnds, regs->cs[i].bnds); |
| 39 | out_be32(&ddr->cs2_config, regs->cs[i].config); |
| 40 | |
| 41 | } else if (i == 3) { |
| 42 | out_be32(&ddr->cs3_bnds, regs->cs[i].bnds); |
| 43 | out_be32(&ddr->cs3_config, regs->cs[i].config); |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | out_be32(&ddr->timing_cfg_3, regs->timing_cfg_3); |
| 48 | out_be32(&ddr->timing_cfg_0, regs->timing_cfg_0); |
| 49 | out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1); |
| 50 | out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2); |
| 51 | out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2); |
| 52 | out_be32(&ddr->sdram_mode, regs->ddr_sdram_mode); |
| 53 | out_be32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2); |
| 54 | out_be32(&ddr->sdram_md_cntl, regs->ddr_sdram_md_cntl); |
| 55 | out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval); |
| 56 | out_be32(&ddr->sdram_data_init, regs->ddr_data_init); |
| 57 | out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl); |
| 58 | out_be32(&ddr->init_addr, regs->ddr_init_addr); |
| 59 | out_be32(&ddr->init_ext_addr, regs->ddr_init_ext_addr); |
| 60 | |
| 61 | /* |
| 62 | * 200 painful micro-seconds must elapse between |
| 63 | * the DDR clock setup and the DDR config enable. |
| 64 | */ |
| 65 | udelay(200); |
| 66 | asm volatile("sync;isync"); |
| 67 | |
| 68 | out_be32(&ddr->sdram_cfg, regs->ddr_sdram_cfg); |
| 69 | |
| 70 | /* Poll DDR_SDRAM_CFG_2[D_INIT] bit until auto-data init is done. */ |
| 71 | while (in_be32(&ddr->sdram_cfg_2) & 0x10) { |
| 72 | udelay(10000); /* throttle polling rate */ |
| 73 | } |
| 74 | } |