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c63e137014
JEDEC spec requires the clocks to be stable before deasserting reset signal for RDIMMs. Clocks start when any chip select is enabled and clock control register is set. This patch also adds the interface to toggle memory reset signal if needed by the boards. Signed-off-by: York Sun <yorksun@freescale.com>
465 lines
15 KiB
C
465 lines
15 KiB
C
/*
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* Copyright 2008-2012 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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/*
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* regs has the to-be-set values for DDR controller registers
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* ctrl_num is the DDR controller number
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* step: 0 goes through the initialization in one pass
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* 1 sets registers and returns before enabling controller
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* 2 resumes from step 1 and continues to initialize
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* Dividing the initialization to two steps to deassert DDR reset signal
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* to comply with JEDEC specs for RDIMMs.
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*/
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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, int step)
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{
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unsigned int i, bus_width;
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volatile ccsr_ddr_t *ddr;
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u32 temp_sdram_cfg;
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u32 total_gb_size_per_controller;
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int timeout;
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#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
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int timeout_save;
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volatile ccsr_local_ecm_t *ecm = (void *)CONFIG_SYS_MPC85xx_ECM_ADDR;
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unsigned int csn_bnds_backup = 0, cs_sa, cs_ea, *csn_bnds_t;
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int csn = -1;
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#endif
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switch (ctrl_num) {
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case 0:
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ddr = (void *)CONFIG_SYS_MPC8xxx_DDR_ADDR;
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break;
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#if defined(CONFIG_SYS_MPC8xxx_DDR2_ADDR) && (CONFIG_NUM_DDR_CONTROLLERS > 1)
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case 1:
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ddr = (void *)CONFIG_SYS_MPC8xxx_DDR2_ADDR;
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break;
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#endif
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#if defined(CONFIG_SYS_MPC8xxx_DDR3_ADDR) && (CONFIG_NUM_DDR_CONTROLLERS > 2)
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case 2:
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ddr = (void *)CONFIG_SYS_MPC8xxx_DDR3_ADDR;
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break;
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#endif
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#if defined(CONFIG_SYS_MPC8xxx_DDR4_ADDR) && (CONFIG_NUM_DDR_CONTROLLERS > 3)
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case 3:
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ddr = (void *)CONFIG_SYS_MPC8xxx_DDR4_ADDR;
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break;
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#endif
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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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if (step == 2)
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goto step2;
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if (regs->ddr_eor)
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out_be32(&ddr->eor, regs->ddr_eor);
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#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
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debug("Workaround for ERRATUM_DDR111_DDR134\n");
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for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
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cs_sa = (regs->cs[i].bnds >> 16) & 0xfff;
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cs_ea = regs->cs[i].bnds & 0xfff;
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if ((cs_sa <= 0xff) && (cs_ea >= 0xff)) {
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csn = i;
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csn_bnds_backup = regs->cs[i].bnds;
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csn_bnds_t = (unsigned int *) ®s->cs[i].bnds;
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if (cs_ea > 0xeff)
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*csn_bnds_t = regs->cs[i].bnds + 0x01000000;
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else
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*csn_bnds_t = regs->cs[i].bnds + 0x01000100;
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debug("Found cs%d_bns (0x%08x) covering 0xff000000, "
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"change it to 0x%x\n",
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csn, csn_bnds_backup, regs->cs[i].bnds);
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break;
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}
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}
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#endif
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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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#ifndef CONFIG_SYS_FSL_DDR_EMU
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/*
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* Skip these two registers if running on emulator
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* because emulator doesn't have skew between bytes.
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*/
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if (regs->ddr_wrlvl_cntl_2)
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out_be32(&ddr->ddr_wrlvl_cntl_2, regs->ddr_wrlvl_cntl_2);
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if (regs->ddr_wrlvl_cntl_3)
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out_be32(&ddr->ddr_wrlvl_cntl_3, regs->ddr_wrlvl_cntl_3);
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#endif
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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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if (regs->debug[i]) {
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debug("Write to debug_%d as %08x\n", i+1, regs->debug[i]);
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out_be32(&ddr->debug[i], regs->debug[i]);
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}
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}
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#ifdef CONFIG_SYS_FSL_ERRATUM_A_004934
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out_be32(&ddr->debug[28], 0x30003000);
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#endif
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#ifdef CONFIG_SYS_FSL_ERRATUM_DDR_A003474
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out_be32(&ddr->debug[12], 0x00000015);
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out_be32(&ddr->debug[21], 0x24000000);
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#endif /* CONFIG_SYS_FSL_ERRATUM_DDR_A003474 */
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/*
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* For RDIMMs, JEDEC spec requires clocks to be stable before reset is
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* deasserted. Clocks start when any chip select is enabled and clock
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* control register is set. Because all DDR components are connected to
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* one reset signal, this needs to be done in two steps. Step 1 is to
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* get the clocks started. Step 2 resumes after reset signal is
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* deasserted.
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*/
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if (step == 1) {
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udelay(200);
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return;
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}
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step2:
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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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#ifdef CONFIG_SYS_FSL_ERRATUM_DDR_A003
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debug("Workaround for ERRATUM_DDR_A003\n");
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if (regs->ddr_sdram_rcw_2 & 0x00f00000) {
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out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2 & 0xf07fffff);
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out_be32(&ddr->debug[2], 0x00000400);
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out_be32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl & 0x7fffffff);
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out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl & 0x7fffffff);
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out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2 & 0xffffffeb);
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out_be32(&ddr->mtcr, 0);
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out_be32(&ddr->debug[12], 0x00000015);
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out_be32(&ddr->debug[21], 0x24000000);
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out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval & 0xffff);
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out_be32(&ddr->sdram_cfg, temp_sdram_cfg | SDRAM_CFG_BI | SDRAM_CFG_MEM_EN);
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asm volatile("sync;isync");
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while (!(in_be32(&ddr->debug[1]) & 0x2))
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;
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switch (regs->ddr_sdram_rcw_2 & 0x00f00000) {
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case 0x00000000:
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out_be32(&ddr->sdram_md_cntl,
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MD_CNTL_MD_EN |
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MD_CNTL_CS_SEL_CS0_CS1 |
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0x04000000 |
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MD_CNTL_WRCW |
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MD_CNTL_MD_VALUE(0x02));
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break;
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case 0x00100000:
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out_be32(&ddr->sdram_md_cntl,
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MD_CNTL_MD_EN |
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MD_CNTL_CS_SEL_CS0_CS1 |
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0x04000000 |
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MD_CNTL_WRCW |
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MD_CNTL_MD_VALUE(0x0a));
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break;
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case 0x00200000:
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out_be32(&ddr->sdram_md_cntl,
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MD_CNTL_MD_EN |
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MD_CNTL_CS_SEL_CS0_CS1 |
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0x04000000 |
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MD_CNTL_WRCW |
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MD_CNTL_MD_VALUE(0x12));
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break;
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case 0x00300000:
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out_be32(&ddr->sdram_md_cntl,
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MD_CNTL_MD_EN |
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MD_CNTL_CS_SEL_CS0_CS1 |
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0x04000000 |
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MD_CNTL_WRCW |
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MD_CNTL_MD_VALUE(0x1a));
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break;
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default:
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out_be32(&ddr->sdram_md_cntl,
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MD_CNTL_MD_EN |
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MD_CNTL_CS_SEL_CS0_CS1 |
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0x04000000 |
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MD_CNTL_WRCW |
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MD_CNTL_MD_VALUE(0x02));
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printf("Unsupported RC10\n");
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break;
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}
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while (in_be32(&ddr->sdram_md_cntl) & 0x80000000)
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;
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udelay(6);
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out_be32(&ddr->sdram_cfg, temp_sdram_cfg);
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out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2);
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out_be32(&ddr->debug[2], 0x0);
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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->sdram_cfg_2, regs->ddr_sdram_cfg_2);
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out_be32(&ddr->debug[12], 0x0);
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out_be32(&ddr->debug[21], 0x0);
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out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval);
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}
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#endif
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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_SYS_FSL_ERRATUM_DDR_115
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debug("Workaround for ERRATUM_DDR_115\n");
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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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#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
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debug("Workaround for ERRATUM_DDR111_DDR134\n");
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/*
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* This is the combined workaround for DDR111 and DDR134
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* following the published errata for MPC8572
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*/
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/* 1. Set EEBACR[3] */
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setbits_be32(&ecm->eebacr, 0x10000000);
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debug("Setting EEBACR[3] to 0x%08x\n", in_be32(&ecm->eebacr));
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/* 2. Set DINIT in SDRAM_CFG_2*/
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setbits_be32(&ddr->sdram_cfg_2, SDRAM_CFG2_D_INIT);
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debug("Setting sdram_cfg_2[D_INIT] to 0x%08x\n",
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in_be32(&ddr->sdram_cfg_2));
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/* 3. Set DEBUG_3[21] */
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setbits_be32(&ddr->debug[2], 0x400);
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debug("Setting DEBUG_3[21] to 0x%08x\n", in_be32(&ddr->debug[2]));
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#endif /* part 1 of the workaound */
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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) & ~SDRAM_CFG_BI;
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out_be32(&ddr->sdram_cfg, temp_sdram_cfg | SDRAM_CFG_MEM_EN);
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asm volatile("sync;isync");
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total_gb_size_per_controller = 0;
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for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
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if (!(regs->cs[i].config & 0x80000000))
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continue;
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total_gb_size_per_controller += 1 << (
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((regs->cs[i].config >> 14) & 0x3) + 2 +
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((regs->cs[i].config >> 8) & 0x7) + 12 +
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((regs->cs[i].config >> 0) & 0x7) + 8 +
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3 - ((regs->ddr_sdram_cfg >> 19) & 0x3) -
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26); /* minus 26 (count of 64M) */
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}
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if (fsl_ddr_get_intl3r() & 0x80000000) /* 3-way interleaving */
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total_gb_size_per_controller *= 3;
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else if (regs->cs[0].config & 0x20000000) /* 2-way interleaving */
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total_gb_size_per_controller <<= 1;
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/*
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* total memory / bus width = transactions needed
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* transactions needed / data rate = seconds
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* to add plenty of buffer, double the time
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* For example, 2GB on 666MT/s 64-bit bus takes about 402ms
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* Let's wait for 800ms
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*/
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bus_width = 3 - ((ddr->sdram_cfg & SDRAM_CFG_DBW_MASK)
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>> SDRAM_CFG_DBW_SHIFT);
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timeout = ((total_gb_size_per_controller << (6 - bus_width)) * 100 /
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(get_ddr_freq(0) >> 20)) << 1;
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#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
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timeout_save = timeout;
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#endif
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total_gb_size_per_controller >>= 4; /* shift down to gb size */
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debug("total %d GB\n", total_gb_size_per_controller);
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debug("Need to wait up to %d * 10ms\n", timeout);
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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) & SDRAM_CFG2_D_INIT) &&
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(timeout >= 0)) {
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udelay(10000); /* throttle polling rate */
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timeout--;
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}
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if (timeout <= 0)
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printf("Waiting for D_INIT timeout. Memory may not work.\n");
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#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
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/* continue this workaround */
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/* 4. Clear DEBUG3[21] */
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clrbits_be32(&ddr->debug[2], 0x400);
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debug("Clearing D3[21] to 0x%08x\n", in_be32(&ddr->debug[2]));
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/* DDR134 workaround starts */
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/* A: Clear sdram_cfg_2[odt_cfg] */
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clrbits_be32(&ddr->sdram_cfg_2, SDRAM_CFG2_ODT_CFG_MASK);
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debug("Clearing SDRAM_CFG2[ODT_CFG] to 0x%08x\n",
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in_be32(&ddr->sdram_cfg_2));
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/* B: Set DEBUG1[15] */
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setbits_be32(&ddr->debug[0], 0x10000);
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debug("Setting D1[15] to 0x%08x\n", in_be32(&ddr->debug[0]));
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/* C: Set timing_cfg_2[cpo] to 0b11111 */
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setbits_be32(&ddr->timing_cfg_2, TIMING_CFG_2_CPO_MASK);
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debug("Setting TMING_CFG_2[CPO] to 0x%08x\n",
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in_be32(&ddr->timing_cfg_2));
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/* D: Set D6 to 0x9f9f9f9f */
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|
out_be32(&ddr->debug[5], 0x9f9f9f9f);
|
|
debug("Setting D6 to 0x%08x\n", in_be32(&ddr->debug[5]));
|
|
|
|
/* E: Set D7 to 0x9f9f9f9f */
|
|
out_be32(&ddr->debug[6], 0x9f9f9f9f);
|
|
debug("Setting D7 to 0x%08x\n", in_be32(&ddr->debug[6]));
|
|
|
|
/* F: Set D2[20] */
|
|
setbits_be32(&ddr->debug[1], 0x800);
|
|
debug("Setting D2[20] to 0x%08x\n", in_be32(&ddr->debug[1]));
|
|
|
|
/* G: Poll on D2[20] until cleared */
|
|
while (in_be32(&ddr->debug[1]) & 0x800)
|
|
udelay(10000); /* throttle polling rate */
|
|
|
|
/* H: Clear D1[15] */
|
|
clrbits_be32(&ddr->debug[0], 0x10000);
|
|
debug("Setting D1[15] to 0x%08x\n", in_be32(&ddr->debug[0]));
|
|
|
|
/* I: Set sdram_cfg_2[odt_cfg] */
|
|
setbits_be32(&ddr->sdram_cfg_2,
|
|
regs->ddr_sdram_cfg_2 & SDRAM_CFG2_ODT_CFG_MASK);
|
|
debug("Setting sdram_cfg_2 to 0x%08x\n", in_be32(&ddr->sdram_cfg_2));
|
|
|
|
/* Continuing with the DDR111 workaround */
|
|
/* 5. Set D2[21] */
|
|
setbits_be32(&ddr->debug[1], 0x400);
|
|
debug("Setting D2[21] to 0x%08x\n", in_be32(&ddr->debug[1]));
|
|
|
|
/* 6. Poll D2[21] until its cleared */
|
|
while (in_be32(&ddr->debug[1]) & 0x400)
|
|
udelay(10000); /* throttle polling rate */
|
|
|
|
/* 7. Wait for state machine 2nd run, roughly 400ms/GB */
|
|
debug("Wait for %d * 10ms\n", timeout_save);
|
|
udelay(timeout_save * 10000);
|
|
|
|
/* 8. Set sdram_cfg_2[dinit] if options requires */
|
|
setbits_be32(&ddr->sdram_cfg_2,
|
|
regs->ddr_sdram_cfg_2 & SDRAM_CFG2_D_INIT);
|
|
debug("Setting sdram_cfg_2 to 0x%08x\n", in_be32(&ddr->sdram_cfg_2));
|
|
|
|
/* 9. Poll until dinit is cleared */
|
|
timeout = timeout_save;
|
|
debug("Need to wait up to %d * 10ms\n", timeout);
|
|
while ((in_be32(&ddr->sdram_cfg_2) & SDRAM_CFG2_D_INIT) &&
|
|
(timeout >= 0)) {
|
|
udelay(10000); /* throttle polling rate */
|
|
timeout--;
|
|
}
|
|
|
|
if (timeout <= 0)
|
|
printf("Waiting for D_INIT timeout. Memory may not work.\n");
|
|
|
|
/* 10. Clear EEBACR[3] */
|
|
clrbits_be32(&ecm->eebacr, 10000000);
|
|
debug("Clearing EEBACR[3] to 0x%08x\n", in_be32(&ecm->eebacr));
|
|
|
|
if (csn != -1) {
|
|
csn_bnds_t = (unsigned int *) ®s->cs[csn].bnds;
|
|
*csn_bnds_t = csn_bnds_backup;
|
|
debug("Change cs%d_bnds back to 0x%08x\n",
|
|
csn, regs->cs[csn].bnds);
|
|
setbits_be32(&ddr->sdram_cfg, 0x2); /* MEM_HALT */
|
|
switch (csn) {
|
|
case 0:
|
|
out_be32(&ddr->cs0_bnds, regs->cs[csn].bnds);
|
|
break;
|
|
case 1:
|
|
out_be32(&ddr->cs1_bnds, regs->cs[csn].bnds);
|
|
break;
|
|
case 2:
|
|
out_be32(&ddr->cs2_bnds, regs->cs[csn].bnds);
|
|
break;
|
|
case 3:
|
|
out_be32(&ddr->cs3_bnds, regs->cs[csn].bnds);
|
|
break;
|
|
}
|
|
clrbits_be32(&ddr->sdram_cfg, 0x2);
|
|
}
|
|
#endif /* CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134 */
|
|
}
|