/*
- * Copyright 2008-2011 Freescale Semiconductor, Inc.
+ * Copyright 2008-2012 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
#error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL
#endif
+
+/*
+ * regs has the to-be-set values for DDR controller registers
+ * ctrl_num is the DDR controller number
+ * step: 0 goes through the initialization in one pass
+ * 1 sets registers and returns before enabling controller
+ * 2 resumes from step 1 and continues to initialize
+ * Dividing the initialization to two steps to deassert DDR reset signal
+ * to comply with JEDEC specs for RDIMMs.
+ */
void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
- unsigned int ctrl_num)
+ unsigned int ctrl_num, int step)
{
- unsigned int i;
+ unsigned int i, bus_width;
volatile ccsr_ddr_t *ddr;
u32 temp_sdram_cfg;
+ u32 total_gb_size_per_controller;
+ int timeout;
#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
+ int timeout_save;
volatile ccsr_local_ecm_t *ecm = (void *)CONFIG_SYS_MPC85xx_ECM_ADDR;
- u32 total_gb_size_per_controller;
+ unsigned int csn_bnds_backup = 0, cs_sa, cs_ea, *csn_bnds_t;
+ int csn = -1;
#endif
switch (ctrl_num) {
case 0:
- ddr = (void *)CONFIG_SYS_MPC85xx_DDR_ADDR;
+ ddr = (void *)CONFIG_SYS_MPC8xxx_DDR_ADDR;
break;
+#if defined(CONFIG_SYS_MPC8xxx_DDR2_ADDR) && (CONFIG_NUM_DDR_CONTROLLERS > 1)
case 1:
- ddr = (void *)CONFIG_SYS_MPC85xx_DDR2_ADDR;
+ ddr = (void *)CONFIG_SYS_MPC8xxx_DDR2_ADDR;
+ break;
+#endif
+#if defined(CONFIG_SYS_MPC8xxx_DDR3_ADDR) && (CONFIG_NUM_DDR_CONTROLLERS > 2)
+ case 2:
+ ddr = (void *)CONFIG_SYS_MPC8xxx_DDR3_ADDR;
break;
+#endif
+#if defined(CONFIG_SYS_MPC8xxx_DDR4_ADDR) && (CONFIG_NUM_DDR_CONTROLLERS > 3)
+ case 3:
+ ddr = (void *)CONFIG_SYS_MPC8xxx_DDR4_ADDR;
+ break;
+#endif
default:
printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
return;
}
- out_be32(&ddr->eor, regs->ddr_eor);
+ if (step == 2)
+ goto step2;
+ if (regs->ddr_eor)
+ out_be32(&ddr->eor, regs->ddr_eor);
+#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
+ debug("Workaround for ERRATUM_DDR111_DDR134\n");
+ for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
+ cs_sa = (regs->cs[i].bnds >> 16) & 0xfff;
+ cs_ea = regs->cs[i].bnds & 0xfff;
+ if ((cs_sa <= 0xff) && (cs_ea >= 0xff)) {
+ csn = i;
+ csn_bnds_backup = regs->cs[i].bnds;
+ csn_bnds_t = (unsigned int *) ®s->cs[i].bnds;
+ if (cs_ea > 0xeff)
+ *csn_bnds_t = regs->cs[i].bnds + 0x01000000;
+ else
+ *csn_bnds_t = regs->cs[i].bnds + 0x01000100;
+ debug("Found cs%d_bns (0x%08x) covering 0xff000000, "
+ "change it to 0x%x\n",
+ csn, csn_bnds_backup, regs->cs[i].bnds);
+ break;
+ }
+ }
+#endif
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->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);
+#ifndef CONFIG_SYS_FSL_DDR_EMU
+ /*
+ * Skip these two registers if running on emulator
+ * because emulator doesn't have skew between bytes.
+ */
+
+ if (regs->ddr_wrlvl_cntl_2)
+ out_be32(&ddr->ddr_wrlvl_cntl_2, regs->ddr_wrlvl_cntl_2);
+ if (regs->ddr_wrlvl_cntl_3)
+ out_be32(&ddr->ddr_wrlvl_cntl_3, regs->ddr_wrlvl_cntl_3);
+#endif
+
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_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]);
+ for (i = 0; i < 32; i++) {
+ if (regs->debug[i]) {
+ debug("Write to debug_%d as %08x\n", i+1, regs->debug[i]);
+ out_be32(&ddr->debug[i], regs->debug[i]);
+ }
+ }
+#ifdef CONFIG_SYS_FSL_ERRATUM_A_004934
+ out_be32(&ddr->debug[28], 0x30003000);
+#endif
+
+#ifdef CONFIG_SYS_FSL_ERRATUM_DDR_A003474
+ out_be32(&ddr->debug[12], 0x00000015);
+ out_be32(&ddr->debug[21], 0x24000000);
+#endif /* CONFIG_SYS_FSL_ERRATUM_DDR_A003474 */
+ /*
+ * For RDIMMs, JEDEC spec requires clocks to be stable before reset is
+ * deasserted. Clocks start when any chip select is enabled and clock
+ * control register is set. Because all DDR components are connected to
+ * one reset signal, this needs to be done in two steps. Step 1 is to
+ * get the clocks started. Step 2 resumes after reset signal is
+ * deasserted.
+ */
+ if (step == 1) {
+ udelay(200);
+ return;
+ }
+
+step2:
/* 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
+ debug("Workaround for ERRATUM_DDR_A003\n");
if (regs->ddr_sdram_rcw_2 & 0x00f00000) {
out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2 & 0xf07fffff);
out_be32(&ddr->debug[2], 0x00000400);
* This erratum does not affect DDR3 mode, only for DDR2 mode.
*/
#ifdef CONFIG_SYS_FSL_ERRATUM_DDR_115
+ debug("Workaround for ERRATUM_DDR_115\n");
if ((((in_be32(&ddr->sdram_cfg) >> 24) & 0x7) == SDRAM_TYPE_DDR2)
&& in_be32(&ddr->sdram_cfg) & 0x80000) {
/* set DEBUG_1[31] */
}
#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
+ debug("Workaround for ERRATUM_DDR111_DDR134\n");
/*
* This is the combined workaround for DDR111 and DDR134
* following the published errata for MPC8572
out_be32(&ddr->sdram_cfg, temp_sdram_cfg | SDRAM_CFG_MEM_EN);
asm volatile("sync;isync");
+ total_gb_size_per_controller = 0;
+ for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
+ if (!(regs->cs[i].config & 0x80000000))
+ continue;
+ total_gb_size_per_controller += 1 << (
+ ((regs->cs[i].config >> 14) & 0x3) + 2 +
+ ((regs->cs[i].config >> 8) & 0x7) + 12 +
+ ((regs->cs[i].config >> 0) & 0x7) + 8 +
+ 3 - ((regs->ddr_sdram_cfg >> 19) & 0x3) -
+ 26); /* minus 26 (count of 64M) */
+ }
+ if (fsl_ddr_get_intl3r() & 0x80000000) /* 3-way interleaving */
+ total_gb_size_per_controller *= 3;
+ else if (regs->cs[0].config & 0x20000000) /* 2-way interleaving */
+ total_gb_size_per_controller <<= 1;
+ /*
+ * total memory / bus width = transactions needed
+ * transactions needed / data rate = seconds
+ * to add plenty of buffer, double the time
+ * For example, 2GB on 666MT/s 64-bit bus takes about 402ms
+ * Let's wait for 800ms
+ */
+ bus_width = 3 - ((ddr->sdram_cfg & SDRAM_CFG_DBW_MASK)
+ >> SDRAM_CFG_DBW_SHIFT);
+ timeout = ((total_gb_size_per_controller << (6 - bus_width)) * 100 /
+ (get_ddr_freq(0) >> 20)) << 1;
+#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
+ timeout_save = timeout;
+#endif
+ total_gb_size_per_controller >>= 4; /* shift down to gb size */
+ debug("total %d GB\n", total_gb_size_per_controller);
+ debug("Need to wait up to %d * 10ms\n", timeout);
+
/* 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)
+ 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");
#ifdef CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134
/* continue this workaround */
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);
+ /* 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,
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);
+ 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 */
}
projects / karo-tx-uboot.git / blobdiff