[U-Boot] [PATCH 1/2] am43xx: Update EMIF DDR3 Configuration for AM43x GP
Franklin S Cooper Jr
fcooper at ti.com
Fri Jun 27 20:31:14 CEST 2014
From: "Franklin S. Cooper Jr" <fcooper at ti.com>
* Boot failures have been discovered due to a combination of routing issues and
non optimal ddr3 timings in the EMIF
* Since ddr3 timings are different after significant board layout changes
different timings are required for alpha, beta and production boards.
Signed-off-by: Franklin S. Cooper Jr <fcooper at ti.com>
---
arch/arm/include/asm/arch-am33xx/omap.h | 2 +
board/ti/am43xx/board.c | 101 +++++++++++++++++++++++++++++++
board/ti/am43xx/board.h | 11 ++++
3 files changed, 114 insertions(+)
diff --git a/arch/arm/include/asm/arch-am33xx/omap.h b/arch/arm/include/asm/arch-am33xx/omap.h
index 0855d16..e5c0b0d 100644
--- a/arch/arm/include/asm/arch-am33xx/omap.h
+++ b/arch/arm/include/asm/arch-am33xx/omap.h
@@ -29,6 +29,8 @@
#define SRAM_SCRATCH_SPACE_ADDR 0x40337C00
#define AM4372_BOARD_NAME_START SRAM_SCRATCH_SPACE_ADDR
#define AM4372_BOARD_NAME_END SRAM_SCRATCH_SPACE_ADDR + 0xC
+#define AM4372_BOARD_VERSION_START SRAM_SCRATCH_SPACE_ADDR + 0xD
+#define AM4372_BOARD_VERSION_END SRAM_SCRATCH_SPACE_ADDR + 0x14
#define QSPI_BASE 0x47900000
#endif
#endif
diff --git a/board/ti/am43xx/board.c b/board/ti/am43xx/board.c
index 054a452..5eaa4a5 100644
--- a/board/ti/am43xx/board.c
+++ b/board/ti/am43xx/board.c
@@ -68,6 +68,9 @@ static int read_eeprom(struct am43xx_board_id *header)
strncpy(am43xx_board_name, (char *)header->name, sizeof(header->name));
am43xx_board_name[sizeof(header->name)] = 0;
+ strncpy(am43xx_board_rev, (char *)header->version, sizeof(header->version));
+ am43xx_board_rev[sizeof(header->version)] = 0;
+
return 0;
}
@@ -217,6 +220,44 @@ const struct emif_regs ddr3_emif_regs_400Mhz = {
.emif_rd_wr_exec_thresh = 0x00000405
};
+/* EMIF DDR3 Configurations are different for beta AM43X GP EVMs */
+const struct emif_regs ddr3_emif_regs_400Mhz_beta = {
+ .sdram_config = 0x638413B2,
+ .ref_ctrl = 0x00000C30,
+ .sdram_tim1 = 0xEAAAD4DB,
+ .sdram_tim2 = 0x266B7FDA,
+ .sdram_tim3 = 0x107F8678,
+ .read_idle_ctrl = 0x00050000,
+ .zq_config = 0x50074BE4,
+ .temp_alert_config = 0x0,
+ .emif_ddr_phy_ctlr_1 = 0x0E004008,
+ .emif_ddr_ext_phy_ctrl_1 = 0x08020080,
+ .emif_ddr_ext_phy_ctrl_2 = 0x00000065,
+ .emif_ddr_ext_phy_ctrl_3 = 0x00000091,
+ .emif_ddr_ext_phy_ctrl_4 = 0x000000B5,
+ .emif_ddr_ext_phy_ctrl_5 = 0x000000E5,
+ .emif_rd_wr_exec_thresh = 0x00000405
+};
+
+/* EMIF DDR3 Configurations are different for production AM43X GP EVMs */
+const struct emif_regs ddr3_emif_regs_400Mhz_production = {
+ .sdram_config = 0x638413B2,
+ .ref_ctrl = 0x00000C30,
+ .sdram_tim1 = 0xEAAAD4DB,
+ .sdram_tim2 = 0x266B7FDA,
+ .sdram_tim3 = 0x107F8678,
+ .read_idle_ctrl = 0x00050000,
+ .zq_config = 0x50074BE4,
+ .temp_alert_config = 0x0,
+ .emif_ddr_phy_ctlr_1 = 0x0E004008,
+ .emif_ddr_ext_phy_ctrl_1 = 0x08020080,
+ .emif_ddr_ext_phy_ctrl_2 = 0x00000066,
+ .emif_ddr_ext_phy_ctrl_3 = 0x00000091,
+ .emif_ddr_ext_phy_ctrl_4 = 0x000000B9,
+ .emif_ddr_ext_phy_ctrl_5 = 0x000000E6,
+ .emif_rd_wr_exec_thresh = 0x00000405
+};
+
static const struct emif_regs ddr3_sk_emif_regs_400Mhz = {
.sdram_config = 0x638413b2,
.sdram_config2 = 0x00000000,
@@ -262,6 +303,52 @@ const u32 ext_phy_ctrl_const_base_ddr3[] = {
0x08102040
};
+const u32 ext_phy_ctrl_const_base_ddr3_beta[] = {
+ 0x00000000,
+ 0x00000045,
+ 0x00000046,
+ 0x00000048,
+ 0x00000047,
+ 0x00000000,
+ 0x0000004C,
+ 0x00000070,
+ 0x00000085,
+ 0x000000A3,
+ 0x00000000,
+ 0x0000000C,
+ 0x00000030,
+ 0x00000045,
+ 0x00000063,
+ 0x00000000,
+ 0x0,
+ 0x0,
+ 0x40000000,
+ 0x08102040
+};
+
+const u32 ext_phy_ctrl_const_base_ddr3_production[] = {
+ 0x00000000,
+ 0x00000044,
+ 0x00000044,
+ 0x00000046,
+ 0x00000046,
+ 0x00000000,
+ 0x00000059,
+ 0x00000077,
+ 0x00000093,
+ 0x000000A8,
+ 0x00000000,
+ 0x00000019,
+ 0x00000037,
+ 0x00000053,
+ 0x00000068,
+ 0x00000000,
+ 0x0,
+ 0x0,
+ 0x40000000,
+ 0x08102040
+};
+
static const u32 ext_phy_ctrl_const_base_ddr3_sk[] = {
/* first 5 are taken care by emif_regs */
0x00700070,
@@ -309,6 +396,12 @@ void emif_get_ext_phy_ctrl_const_regs(const u32 **regs, u32 *size)
if (board_is_eposevm()) {
*regs = ext_phy_ctrl_const_base_lpddr2;
*size = ARRAY_SIZE(ext_phy_ctrl_const_base_lpddr2);
+ } else if (board_is_evm_14_or_later()) {
+ *regs = ext_phy_ctrl_const_base_ddr3_production;
+ *size = ARRAY_SIZE(ext_phy_ctrl_const_base_ddr3_production);
+ } else if (board_is_evm_12_or_later()) {
+ *regs = ext_phy_ctrl_const_base_ddr3_beta;
+ *size = ARRAY_SIZE(ext_phy_ctrl_const_base_ddr3_beta);
} else if (board_is_gpevm()) {
*regs = ext_phy_ctrl_const_base_ddr3;
*size = ARRAY_SIZE(ext_phy_ctrl_const_base_ddr3);
@@ -473,6 +566,14 @@ void sdram_init(void)
*/
if (board_is_eposevm()) {
config_ddr(0, &ioregs_lpddr2, NULL, NULL, &emif_regs_lpddr2, 0);
+ } else if (board_is_evm_14_or_later()) {
+ enable_vtt_regulator();
+ config_ddr(0, &ioregs_ddr3, NULL, NULL,
+ &ddr3_emif_regs_400Mhz_production, 0);
+ } else if (board_is_evm_12_or_later()) {
+ enable_vtt_regulator();
+ config_ddr(0, &ioregs_ddr3, NULL, NULL,
+ &ddr3_emif_regs_400Mhz_beta, 0);
} else if (board_is_gpevm()) {
enable_vtt_regulator();
config_ddr(0, &ioregs_ddr3, NULL, NULL,
diff --git a/board/ti/am43xx/board.h b/board/ti/am43xx/board.h
index 017047d..8e12191 100644
--- a/board/ti/am43xx/board.h
+++ b/board/ti/am43xx/board.h
@@ -15,6 +15,7 @@
#include <asm/arch/omap.h>
static char *const am43xx_board_name = (char *)AM4372_BOARD_NAME_START;
+static char *const am43xx_board_rev = (char *)AM4372_BOARD_VERSION_START;
/*
* TI AM437x EVMs define a system EEPROM that defines certain sub-fields.
@@ -52,6 +53,16 @@ static inline int board_is_sk(void)
return !strncmp(am43xx_board_name, "AM43__SK", HDR_NAME_LEN);
}
+static inline int board_is_evm_14_or_later(void)
+{
+ return (board_is_gpevm() && strncmp("1.4", am43xx_board_rev, 3) <= 0);
+}
+
+static inline int board_is_evm_12_or_later(void)
+{
+ return (board_is_gpevm() && strncmp("1.2", am43xx_board_rev, 3) <= 0);
+}
+
void enable_uart0_pin_mux(void);
void enable_board_pin_mux(void);
void enable_i2c0_pin_mux(void);
--
1.7.9.5
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