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2abbd31da6
The ddr_pd_cntl isn't defined in any reference manual and thus we wil remove especially since we set it to 0, which would most likely be its POR value. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
117 lines
3.7 KiB
C
117 lines
3.7 KiB
C
/*
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* Copyright 2008 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* Version 2 as published by the Free Software Foundation.
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/fsl_ddr_sdram.h>
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#if (CONFIG_CHIP_SELECTS_PER_CTRL > 4)
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#error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL
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#endif
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void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
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unsigned int ctrl_num)
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{
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unsigned int i;
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volatile ccsr_ddr_t *ddr;
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u32 temp_sdram_cfg;
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switch (ctrl_num) {
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case 0:
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ddr = (void *)CONFIG_SYS_MPC85xx_DDR_ADDR;
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break;
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case 1:
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ddr = (void *)CONFIG_SYS_MPC85xx_DDR2_ADDR;
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break;
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default:
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printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
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return;
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}
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for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
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if (i == 0) {
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out_be32(&ddr->cs0_bnds, regs->cs[i].bnds);
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out_be32(&ddr->cs0_config, regs->cs[i].config);
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out_be32(&ddr->cs0_config_2, regs->cs[i].config_2);
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} else if (i == 1) {
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out_be32(&ddr->cs1_bnds, regs->cs[i].bnds);
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out_be32(&ddr->cs1_config, regs->cs[i].config);
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out_be32(&ddr->cs1_config_2, regs->cs[i].config_2);
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} else if (i == 2) {
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out_be32(&ddr->cs2_bnds, regs->cs[i].bnds);
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out_be32(&ddr->cs2_config, regs->cs[i].config);
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out_be32(&ddr->cs2_config_2, regs->cs[i].config_2);
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} else if (i == 3) {
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out_be32(&ddr->cs3_bnds, regs->cs[i].bnds);
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out_be32(&ddr->cs3_config, regs->cs[i].config);
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out_be32(&ddr->cs3_config_2, regs->cs[i].config_2);
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}
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}
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out_be32(&ddr->timing_cfg_3, regs->timing_cfg_3);
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out_be32(&ddr->timing_cfg_0, regs->timing_cfg_0);
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out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1);
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out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2);
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out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2);
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out_be32(&ddr->sdram_mode, regs->ddr_sdram_mode);
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out_be32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2);
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out_be32(&ddr->sdram_md_cntl, regs->ddr_sdram_md_cntl);
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out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval);
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out_be32(&ddr->sdram_data_init, regs->ddr_data_init);
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out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl);
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out_be32(&ddr->init_addr, regs->ddr_init_addr);
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out_be32(&ddr->init_ext_addr, regs->ddr_init_ext_addr);
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out_be32(&ddr->timing_cfg_4, regs->timing_cfg_4);
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out_be32(&ddr->timing_cfg_5, regs->timing_cfg_5);
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out_be32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl);
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out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl);
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out_be32(&ddr->ddr_sr_cntr, regs->ddr_sr_cntr);
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out_be32(&ddr->ddr_sdram_rcw_1, regs->ddr_sdram_rcw_1);
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out_be32(&ddr->ddr_sdram_rcw_2, regs->ddr_sdram_rcw_2);
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/* Set, but do not enable the memory */
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temp_sdram_cfg = regs->ddr_sdram_cfg;
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temp_sdram_cfg &= ~(SDRAM_CFG_MEM_EN);
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out_be32(&ddr->sdram_cfg, temp_sdram_cfg);
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/*
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* For 8572 DDR1 erratum - DDR controller may enter illegal state
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* when operatiing in 32-bit bus mode with 4-beat bursts,
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* This erratum does not affect DDR3 mode, only for DDR2 mode.
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*/
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#ifdef CONFIG_MPC8572
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if ((((in_be32(&ddr->sdram_cfg) >> 24) & 0x7) == SDRAM_TYPE_DDR2)
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&& in_be32(&ddr->sdram_cfg) & 0x80000) {
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/* set DEBUG_1[31] */
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u32 temp = in_be32(&ddr->debug_1);
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out_be32(&ddr->debug_1, temp | 1);
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}
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#endif
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/*
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* 500 painful micro-seconds must elapse between
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* the DDR clock setup and the DDR config enable.
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* DDR2 need 200 us, and DDR3 need 500 us from spec,
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* we choose the max, that is 500 us for all of case.
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*/
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udelay(500);
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asm volatile("sync;isync");
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/* Let the controller go */
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temp_sdram_cfg = in_be32(&ddr->sdram_cfg);
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out_be32(&ddr->sdram_cfg, temp_sdram_cfg | SDRAM_CFG_MEM_EN);
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/* Poll DDR_SDRAM_CFG_2[D_INIT] bit until auto-data init is done. */
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while (in_be32(&ddr->sdram_cfg_2) & 0x10) {
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udelay(10000); /* throttle polling rate */
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}
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}
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