[PATCH 6/9] ram: stm32mp1: update BIST config for tuning
Patrick Delaunay
patrick.delaunay at st.com
Fri Mar 6 11:14:08 CET 2020
Update the BIST config to compute the real use mask for the real
bank, row and col of the used DDR. The values are get from addrmap
register value.
Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
---
drivers/ram/stm32mp1/stm32mp1_tuning.c | 151 +++++++++++++++++++++++--
1 file changed, 142 insertions(+), 9 deletions(-)
diff --git a/drivers/ram/stm32mp1/stm32mp1_tuning.c b/drivers/ram/stm32mp1/stm32mp1_tuning.c
index 37d3ec8fef..07d57d496c 100644
--- a/drivers/ram/stm32mp1/stm32mp1_tuning.c
+++ b/drivers/ram/stm32mp1/stm32mp1_tuning.c
@@ -8,6 +8,7 @@
#include <ram.h>
#include <reset.h>
#include <asm/io.h>
+#include <linux/bitops.h>
#include <linux/iopoll.h>
#include "stm32mp1_ddr_regs.h"
@@ -76,6 +77,133 @@ static u8 get_nb_bytes(struct stm32mp1_ddrctl *ctl)
return nb_bytes;
}
+static u8 get_nb_bank(struct stm32mp1_ddrctl *ctl)
+{
+ /* Count bank address bits */
+ u8 bits = 0;
+ u32 reg, val;
+
+ reg = readl(&ctl->addrmap1);
+ /* addrmap1.addrmap_bank_b1 */
+ val = (reg & GENMASK(5, 0)) >> 0;
+ if (val <= 31)
+ bits++;
+ /* addrmap1.addrmap_bank_b2 */
+ val = (reg & GENMASK(13, 8)) >> 8;
+ if (val <= 31)
+ bits++;
+ /* addrmap1.addrmap_bank_b3 */
+ val = (reg & GENMASK(21, 16)) >> 16;
+ if (val <= 31)
+ bits++;
+
+ return bits;
+}
+
+static u8 get_nb_col(struct stm32mp1_ddrctl *ctl)
+{
+ u8 bits;
+ u32 reg, val;
+
+ /* Count column address bits, start at 2 for b0 and b1 (fixed) */
+ bits = 2;
+
+ reg = readl(&ctl->addrmap2);
+ /* addrmap2.addrmap_col_b2 */
+ val = (reg & GENMASK(3, 0)) >> 0;
+ if (val <= 7)
+ bits++;
+ /* addrmap2.addrmap_col_b3 */
+ val = (reg & GENMASK(11, 8)) >> 8;
+ if (val <= 7)
+ bits++;
+ /* addrmap2.addrmap_col_b4 */
+ val = (reg & GENMASK(19, 16)) >> 16;
+ if (val <= 7)
+ bits++;
+ /* addrmap2.addrmap_col_b5 */
+ val = (reg & GENMASK(27, 24)) >> 24;
+ if (val <= 7)
+ bits++;
+
+ reg = readl(&ctl->addrmap3);
+ /* addrmap3.addrmap_col_b6 */
+ val = (reg & GENMASK(3, 0)) >> 0;
+ if (val <= 7)
+ bits++;
+ /* addrmap3.addrmap_col_b7 */
+ val = (reg & GENMASK(11, 8)) >> 8;
+ if (val <= 7)
+ bits++;
+ /* addrmap3.addrmap_col_b8 */
+ val = (reg & GENMASK(19, 16)) >> 16;
+ if (val <= 7)
+ bits++;
+ /* addrmap3.addrmap_col_b9 */
+ val = (reg & GENMASK(27, 24)) >> 24;
+ if (val <= 7)
+ bits++;
+
+ reg = readl(&ctl->addrmap4);
+ /* addrmap4.addrmap_col_b10 */
+ val = (reg & GENMASK(3, 0)) >> 0;
+ if (val <= 7)
+ bits++;
+ /* addrmap4.addrmap_col_b11 */
+ val = (reg & GENMASK(11, 8)) >> 8;
+ if (val <= 7)
+ bits++;
+
+ return bits;
+}
+
+static u8 get_nb_row(struct stm32mp1_ddrctl *ctl)
+{
+ /* Count row address bits */
+ u8 bits = 0;
+ u32 reg, val;
+
+ reg = readl(&ctl->addrmap5);
+ /* addrmap5.addrmap_row_b0 */
+ val = (reg & GENMASK(3, 0)) >> 0;
+ if (val <= 11)
+ bits++;
+ /* addrmap5.addrmap_row_b1 */
+ val = (reg & GENMASK(11, 8)) >> 8;
+ if (val <= 11)
+ bits++;
+ /* addrmap5.addrmap_row_b2_10 */
+ val = (reg & GENMASK(19, 16)) >> 16;
+ if (val <= 11)
+ bits += 9;
+ else
+ printf("warning: addrmap5.addrmap_row_b2_10 not supported\n");
+ /* addrmap5.addrmap_row_b11 */
+ val = (reg & GENMASK(27, 24)) >> 24;
+ if (val <= 11)
+ bits++;
+
+ reg = readl(&ctl->addrmap6);
+ /* addrmap6.addrmap_row_b12 */
+ val = (reg & GENMASK(3, 0)) >> 0;
+ if (val <= 7)
+ bits++;
+ /* addrmap6.addrmap_row_b13 */
+ val = (reg & GENMASK(11, 8)) >> 8;
+ if (val <= 7)
+ bits++;
+ /* addrmap6.addrmap_row_b14 */
+ val = (reg & GENMASK(19, 16)) >> 16;
+ if (val <= 7)
+ bits++;
+ /* addrmap6.addrmap_row_b15 */
+ val = (reg & GENMASK(27, 24)) >> 24;
+ if (val <= 7)
+ bits++;
+
+ return bits;
+}
+
static void itm_soft_reset(struct stm32mp1_ddrphy *phy)
{
stm32mp1_ddrphy_init(phy, DDRPHYC_PIR_ITMSRST);
@@ -170,8 +298,13 @@ static void set_r0dgps_delay(struct stm32mp1_ddrphy *phy,
}
/* Basic BIST configuration for data lane tests. */
-static void config_BIST(struct stm32mp1_ddrphy *phy)
+static void config_BIST(struct stm32mp1_ddrctl *ctl,
+ struct stm32mp1_ddrphy *phy)
{
+ u8 nb_bank = get_nb_bank(ctl);
+ u8 nb_row = get_nb_row(ctl);
+ u8 nb_col = get_nb_col(ctl);
+
/* Selects the SDRAM bank address to be used during BIST. */
u32 bbank = 0;
/* Selects the SDRAM row address to be used during BIST. */
@@ -191,18 +324,20 @@ static void config_BIST(struct stm32mp1_ddrphy *phy)
* must be 0 with single rank
*/
u32 brank = 0;
+
/* Specifies the maximum SDRAM bank address to be used during
* BIST before the address & increments to the next rank.
*/
- u32 bmbank = 1;
+ u32 bmbank = (1 << nb_bank) - 1;
/* Specifies the maximum SDRAM row address to be used during
* BIST before the address & increments to the next bank.
*/
- u32 bmrow = 0x7FFF; /* To check */
+ u32 bmrow = (1 << nb_row) - 1;
/* Specifies the maximum SDRAM column address to be used during
* BIST before the address & increments to the next row.
*/
- u32 bmcol = 0x3FF; /* To check */
+ u32 bmcol = (1 << nb_col) - 1;
+
u32 bmode_conf = 0x00000001; /* DRam mode */
u32 bdxen_conf = 0x00000001; /* BIST on Data byte */
u32 bdpat_conf = 0x00000002; /* Select LFSR pattern */
@@ -224,8 +359,6 @@ static void config_BIST(struct stm32mp1_ddrphy *phy)
writel(bcol | (brow << 12) | (bbank << 28), &phy->bistar0);
writel(brank | (bmrank << 2) | (bainc << 4), &phy->bistar1);
-
- /* To check this line : */
writel(bmcol | (bmrow << 12) | (bmbank << 28), &phy->bistar2);
}
@@ -399,7 +532,7 @@ static enum test_result bit_deskew(struct stm32mp1_ddrctl *ctl,
clrbits_le32(&phy->dx3gcr, DDRPHYC_DXNGCR_DXEN);
/* Config the BIST block */
- config_BIST(phy);
+ config_BIST(ctl, phy);
pr_debug("BIST Config done.\n");
/* Train each byte */
@@ -812,7 +945,7 @@ static enum test_result eye_training(struct stm32mp1_ddrctl *ctl,
clrbits_le32(&phy->dx3gcr, DDRPHYC_DXNGCR_DXEN);
/* Config the BIST block */
- config_BIST(phy);
+ config_BIST(ctl, phy);
for (byte = 0; byte < nb_bytes; byte++) {
if (ctrlc()) {
@@ -1234,7 +1367,7 @@ static enum test_result read_dqs_gating(struct stm32mp1_ddrctl *ctl,
clrbits_le32(&phy->dx3gcr, DDRPHYC_DXNGCR_DXEN);
/* config the bist block */
- config_BIST(phy);
+ config_BIST(ctl, phy);
for (byte = 0; byte < nb_bytes; byte++) {
if (ctrlc()) {
--
2.17.1
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