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u-boot/arch/powerpc/cpu/mpc85xx/ddr-gen3.c
York Sun 91671913f7 powerpc/mpc85xx: implement workaround for errata DDR111 and DDR134 
Workaround for the following errata:
DDR111 - MCKE signal may not function correctly at assertion of HRESET
DDR134 - The automatic CAS-to-Preamble feature of the DDR controller can
         calibrate to incorrect values

These two workarounds must be implemented together because they touch
common registers.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-02-03 02:46:13 -06:00

312 lines
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/*
* Copyright 2008-2011 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* Version 2 as published by the Free Software Foundation.
*/
#include <common.h>
#include <asm/io.h>
#include <asm/fsl_ddr_sdram.h>
#include <asm/processor.h>
#if (CONFIG_CHIP_SELECTS_PER_CTRL > 4)
#error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL
#endif
void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
unsigned int ctrl_num)
{
unsigned int i;
volatile ccsr_ddr_t *ddr;
u32 temp_sdram_cfg;
#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
volatile ccsr_local_ecm_t *ecm = (void *)CONFIG_SYS_MPC85xx_ECM_ADDR;
u32 total_gb_size_per_controller;
#endif
switch (ctrl_num) {
case 0:
ddr = (void *)CONFIG_SYS_MPC85xx_DDR_ADDR;
break;
case 1:
ddr = (void *)CONFIG_SYS_MPC85xx_DDR2_ADDR;
break;
default:
printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
return;
}
out_be32(&ddr->eor, regs->ddr_eor);
for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
if (i == 0) {
out_be32(&ddr->cs0_bnds, regs->cs[i].bnds);
out_be32(&ddr->cs0_config, regs->cs[i].config);
out_be32(&ddr->cs0_config_2, regs->cs[i].config_2);
} else if (i == 1) {
out_be32(&ddr->cs1_bnds, regs->cs[i].bnds);
out_be32(&ddr->cs1_config, regs->cs[i].config);
out_be32(&ddr->cs1_config_2, regs->cs[i].config_2);
} else if (i == 2) {
out_be32(&ddr->cs2_bnds, regs->cs[i].bnds);
out_be32(&ddr->cs2_config, regs->cs[i].config);
out_be32(&ddr->cs2_config_2, regs->cs[i].config_2);
} else if (i == 3) {
out_be32(&ddr->cs3_bnds, regs->cs[i].bnds);
out_be32(&ddr->cs3_config, regs->cs[i].config);
out_be32(&ddr->cs3_config_2, regs->cs[i].config_2);
}
}
out_be32(&ddr->timing_cfg_3, regs->timing_cfg_3);
out_be32(&ddr->timing_cfg_0, regs->timing_cfg_0);
out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1);
out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2);
out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2);
out_be32(&ddr->sdram_mode, regs->ddr_sdram_mode);
out_be32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2);
out_be32(&ddr->sdram_mode_3, regs->ddr_sdram_mode_3);
out_be32(&ddr->sdram_mode_4, regs->ddr_sdram_mode_4);
out_be32(&ddr->sdram_mode_5, regs->ddr_sdram_mode_5);
out_be32(&ddr->sdram_mode_6, regs->ddr_sdram_mode_6);
out_be32(&ddr->sdram_mode_7, regs->ddr_sdram_mode_7);
out_be32(&ddr->sdram_mode_8, regs->ddr_sdram_mode_8);
out_be32(&ddr->sdram_md_cntl, regs->ddr_sdram_md_cntl);
out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval);
out_be32(&ddr->sdram_data_init, regs->ddr_data_init);
out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl);
out_be32(&ddr->init_addr, regs->ddr_init_addr);
out_be32(&ddr->init_ext_addr, regs->ddr_init_ext_addr);
out_be32(&ddr->timing_cfg_4, regs->timing_cfg_4);
out_be32(&ddr->timing_cfg_5, regs->timing_cfg_5);
out_be32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl);
out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl);
out_be32(&ddr->ddr_sr_cntr, regs->ddr_sr_cntr);
out_be32(&ddr->ddr_sdram_rcw_1, regs->ddr_sdram_rcw_1);
out_be32(&ddr->ddr_sdram_rcw_2, regs->ddr_sdram_rcw_2);
out_be32(&ddr->ddr_cdr1, regs->ddr_cdr1);
out_be32(&ddr->ddr_cdr2, regs->ddr_cdr2);
out_be32(&ddr->err_disable, regs->err_disable);
out_be32(&ddr->err_int_en, regs->err_int_en);
for (i = 0; i < 32; i++)
out_be32(&ddr->debug[i], regs->debug[i]);
/* Set, but do not enable the memory */
temp_sdram_cfg = regs->ddr_sdram_cfg;
temp_sdram_cfg &= ~(SDRAM_CFG_MEM_EN);
out_be32(&ddr->sdram_cfg, temp_sdram_cfg);
#ifdef CONFIG_SYS_FSL_ERRATUM_DDR_A003
if (regs->ddr_sdram_rcw_2 & 0x00f00000) {
out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2 & 0xf07fffff);
out_be32(&ddr->debug[2], 0x00000400);
out_be32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl & 0x7fffffff);
out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl & 0x7fffffff);
out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2 & 0xffffffeb);
out_be32(&ddr->mtcr, 0);
out_be32(&ddr->debug[12], 0x00000015);
out_be32(&ddr->debug[21], 0x24000000);
out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval & 0xffff);
out_be32(&ddr->sdram_cfg, temp_sdram_cfg | SDRAM_CFG_BI | SDRAM_CFG_MEM_EN);
asm volatile("sync;isync");
while (!(in_be32(&ddr->debug[1]) & 0x2))
;
switch (regs->ddr_sdram_rcw_2 & 0x00f00000) {
case 0x00000000:
out_be32(&ddr->sdram_md_cntl,
MD_CNTL_MD_EN |
MD_CNTL_CS_SEL_CS0_CS1 |
0x04000000 |
MD_CNTL_WRCW |
MD_CNTL_MD_VALUE(0x02));
break;
case 0x00100000:
out_be32(&ddr->sdram_md_cntl,
MD_CNTL_MD_EN |
MD_CNTL_CS_SEL_CS0_CS1 |
0x04000000 |
MD_CNTL_WRCW |
MD_CNTL_MD_VALUE(0x0a));
break;
case 0x00200000:
out_be32(&ddr->sdram_md_cntl,
MD_CNTL_MD_EN |
MD_CNTL_CS_SEL_CS0_CS1 |
0x04000000 |
MD_CNTL_WRCW |
MD_CNTL_MD_VALUE(0x12));
break;
case 0x00300000:
out_be32(&ddr->sdram_md_cntl,
MD_CNTL_MD_EN |
MD_CNTL_CS_SEL_CS0_CS1 |
0x04000000 |
MD_CNTL_WRCW |
MD_CNTL_MD_VALUE(0x1a));
break;
default:
out_be32(&ddr->sdram_md_cntl,
MD_CNTL_MD_EN |
MD_CNTL_CS_SEL_CS0_CS1 |
0x04000000 |
MD_CNTL_WRCW |
MD_CNTL_MD_VALUE(0x02));
printf("Unsupported RC10\n");
break;
}
while (in_be32(&ddr->sdram_md_cntl) & 0x80000000)
;
udelay(6);
out_be32(&ddr->sdram_cfg, temp_sdram_cfg);
out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2);
out_be32(&ddr->debug[2], 0x0);
out_be32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl);
out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl);
out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2);
out_be32(&ddr->debug[12], 0x0);
out_be32(&ddr->debug[21], 0x0);
out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval);
}
#endif
/*
* For 8572 DDR1 erratum - DDR controller may enter illegal state
* when operatiing in 32-bit bus mode with 4-beat bursts,
* This erratum does not affect DDR3 mode, only for DDR2 mode.
*/
#ifdef CONFIG_SYS_FSL_ERRATUM_DDR_115
if ((((in_be32(&ddr->sdram_cfg) >> 24) & 0x7) == SDRAM_TYPE_DDR2)
&& in_be32(&ddr->sdram_cfg) & 0x80000) {
/* set DEBUG_1[31] */
setbits_be32(&ddr->debug[0], 1);
}
#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
/*
* This is the combined workaround for DDR111 and DDR134
* following the published errata for MPC8572
*/
/* 1. Set EEBACR[3] */
setbits_be32(&ecm->eebacr, 0x10000000);
debug("Setting EEBACR[3] to 0x%08x\n", in_be32(&ecm->eebacr));
/* 2. Set DINIT in SDRAM_CFG_2*/
setbits_be32(&ddr->sdram_cfg_2, SDRAM_CFG2_D_INIT);
debug("Setting sdram_cfg_2[D_INIT] to 0x%08x\n",
in_be32(&ddr->sdram_cfg_2));
/* 3. Set DEBUG_3[21] */
setbits_be32(&ddr->debug[2], 0x400);
debug("Setting DEBUG_3[21] to 0x%08x\n", in_be32(&ddr->debug[2]));
#endif /* part 1 of the workaound */
/*
* 500 painful micro-seconds must elapse between
* the DDR clock setup and the DDR config enable.
* DDR2 need 200 us, and DDR3 need 500 us from spec,
* we choose the max, that is 500 us for all of case.
*/
udelay(500);
asm volatile("sync;isync");
/* Let the controller go */
temp_sdram_cfg = in_be32(&ddr->sdram_cfg) & ~SDRAM_CFG_BI;
out_be32(&ddr->sdram_cfg, temp_sdram_cfg | SDRAM_CFG_MEM_EN);
asm volatile("sync;isync");
/* Poll DDR_SDRAM_CFG_2[D_INIT] bit until auto-data init is done. */
while (in_be32(&ddr->sdram_cfg_2) & SDRAM_CFG2_D_INIT)
udelay(10000); /* throttle polling rate */
#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
/* continue this workaround */
/* 4. Clear DEBUG3[21] */
clrbits_be32(&ddr->debug[2], 0x400);
debug("Clearing D3[21] to 0x%08x\n", in_be32(&ddr->debug[2]));
/* DDR134 workaround starts */
/* A: Clear sdram_cfg_2[odt_cfg] */
clrbits_be32(&ddr->sdram_cfg_2, SDRAM_CFG2_ODT_CFG_MASK);
debug("Clearing SDRAM_CFG2[ODT_CFG] to 0x%08x\n",
in_be32(&ddr->sdram_cfg_2));
/* B: Set DEBUG1[15] */
setbits_be32(&ddr->debug[0], 0x10000);
debug("Setting D1[15] to 0x%08x\n", in_be32(&ddr->debug[0]));
/* C: Set timing_cfg_2[cpo] to 0b11111 */
setbits_be32(&ddr->timing_cfg_2, TIMING_CFG_2_CPO_MASK);
debug("Setting TMING_CFG_2[CPO] to 0x%08x\n",
in_be32(&ddr->timing_cfg_2));
/* D: Set D6 to 0x9f9f9f9f */
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 400ms/GB */
total_gb_size_per_controller = 0;
for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
total_gb_size_per_controller +=
((regs->cs[i].bnds & 0xFFFF) >> 6)
- (regs->cs[i].bnds >> 22) + 1;
}
if (in_be32(&ddr->sdram_cfg) & 0x80000)
total_gb_size_per_controller <<= 1;
debug("Wait for %d ms\n", total_gb_size_per_controller * 400);
udelay(total_gb_size_per_controller * 400000);
/* 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 */
while (in_be32(&ddr->sdram_cfg_2) & SDRAM_CFG2_D_INIT)
udelay(10000);
/* 10. Clear EEBACR[3] */
clrbits_be32(&ecm->eebacr, 10000000);
debug("Clearing EEBACR[3] to 0x%08x\n", in_be32(&ecm->eebacr));
#endif /* CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134 */
}
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