mirror of
https://github.com/AsahiLinux/u-boot
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e1fd16b6f5
Added fsl_ddr_get_version() function to for DDR3 to poll DDRC IP version (major, minor, errata) to determine if unique mode registers are available. If true, always use unique mode registers. Dynamic ODT is enabled if needed. The table is documented in doc/README.fsl-ddr. This function may also need to be extend for future other platforms if such a feature exists. Enable address parity and RCW by default for RDIMMs. Change default output driver impedance from 34 ohm to 40ohm. Make it 34ohm for quad-rank RDIMMs. Use a formula to calculate rodt_on for timing_cfg_5. Signed-off-by: York Sun <yorksun@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
130 lines
4.3 KiB
C
130 lines
4.3 KiB
C
/*
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* Copyright 2008-2011 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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#include <asm/processor.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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out_be32(&ddr->eor, regs->ddr_eor);
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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_mode_3, regs->ddr_sdram_mode_3);
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out_be32(&ddr->sdram_mode_4, regs->ddr_sdram_mode_4);
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out_be32(&ddr->sdram_mode_5, regs->ddr_sdram_mode_5);
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out_be32(&ddr->sdram_mode_6, regs->ddr_sdram_mode_6);
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out_be32(&ddr->sdram_mode_7, regs->ddr_sdram_mode_7);
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out_be32(&ddr->sdram_mode_8, regs->ddr_sdram_mode_8);
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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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out_be32(&ddr->ddr_cdr1, regs->ddr_cdr1);
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out_be32(&ddr->ddr_cdr2, regs->ddr_cdr2);
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out_be32(&ddr->err_disable, regs->err_disable);
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out_be32(&ddr->err_int_en, regs->err_int_en);
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for (i = 0; i < 32; i++)
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out_be32(&ddr->debug[i], regs->debug[i]);
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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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setbits_be32(&ddr->debug[0], 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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