The workaround requires different setting for range 1 vs 2. Also adjust timeout value for waiting for controller to be idle.
Signed-off-by: York Sun yorksun@freescale.com ---
drivers/ddr/fsl/fsl_ddr_gen4.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-)
diff --git a/drivers/ddr/fsl/fsl_ddr_gen4.c b/drivers/ddr/fsl/fsl_ddr_gen4.c index 49e4688..70ce1b8 100644 --- a/drivers/ddr/fsl/fsl_ddr_gen4.c +++ b/drivers/ddr/fsl/fsl_ddr_gen4.c @@ -54,6 +54,9 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, #endif #ifdef CONFIG_SYS_FSL_ERRATUM_A008511 u32 temp32, mr6; + u32 vref_seq1[3] = {0x80, 0x96, 0x16}; /* for range 1 */ + u32 vref_seq2[3] = {0xc0, 0xf0, 0x70}; /* for range 2 */ + u32 *vref_seq = vref_seq1; #endif #ifdef CONFIG_FSL_DDR_BIST u32 mtcr, err_detect, err_sbe; @@ -307,16 +310,21 @@ step2: /* This erraum only applies to verion 5.2.0 */ if (fsl_ddr_get_version(ctrl_num) == 0x50200) { /* Wait for idle */ - timeout = 200; + timeout = 40; while (!(ddr_in32(&ddr->debug[1]) & 0x2) && (timeout > 0)) { - udelay(100); + udelay(1000); timeout--; } if (timeout <= 0) { printf("Controler %d timeout, debug_2 = %x\n", ctrl_num, ddr_in32(&ddr->debug[1])); } + + /* The vref setting sequence is different for range 2 */ + if (regs->ddr_cdr2 & DDR_CDR2_VREF_RANGE_2) + vref_seq = vref_seq2; + /* Set VREF */ for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { if (!(regs->cs[i].config & SDRAM_CS_CONFIG_EN)) @@ -327,17 +335,17 @@ step2: MD_CNTL_CS_SEL(i) | MD_CNTL_MD_SEL(6) | 0x00200000; - temp32 = mr6 | 0xc0; + temp32 = mr6 | vref_seq[0]; set_wait_for_bits_clear(&ddr->sdram_md_cntl, temp32, MD_CNTL_MD_EN); udelay(1); debug("MR6 = 0x%08x\n", temp32); - temp32 = mr6 | 0xf0; + temp32 = mr6 | vref_seq[1]; set_wait_for_bits_clear(&ddr->sdram_md_cntl, temp32, MD_CNTL_MD_EN); udelay(1); debug("MR6 = 0x%08x\n", temp32); - temp32 = mr6 | 0x70; + temp32 = mr6 | vref_seq[2]; set_wait_for_bits_clear(&ddr->sdram_md_cntl, temp32, MD_CNTL_MD_EN); udelay(1); @@ -347,10 +355,10 @@ step2: ddr_out32(&ddr->debug[28], 0); /* Enable deskew */ ddr_out32(&ddr->debug[1], 0x400); /* restart deskew */ /* wait for idle */ - timeout = 200; + timeout = 40; while (!(ddr_in32(&ddr->debug[1]) & 0x2) && (timeout > 0)) { - udelay(100); + udelay(1000); timeout--; } if (timeout <= 0) {