[U-Boot] [PATCH V3 13/14] ARM: AM43xx: GP_EVM: Add support for DDR3
Lokesh Vutla
lokeshvutla at ti.com
Tue Dec 10 10:32:23 CET 2013
GP EVM has 1GB DDR3 attached(Part no: MT41K512M8RH).
Adding details for the same.
Below is the brief description of DDR3 init sequence(SW leveling):
-> Enable VTT regulator
-> Configure VTP
-> Configure DDR IO settings
-> Disable initialization and refreshes until EMIF registers are programmed.
-> Program Timing registers
-> Program leveling registers
-> Program PHY control and Temp alert and ZQ config registers.
-> Enable initialization and refreshes and configure SDRAM CONFIG register
Signed-off-by: Lokesh Vutla <lokeshvutla at ti.com>
---
Changes since V2:
-> No change.
arch/arm/cpu/armv7/am33xx/ddr.c | 6 +-
arch/arm/cpu/armv7/omap-common/emif-common.c | 14 ----
arch/arm/include/asm/arch-am33xx/ddr_defs.h | 8 +++
arch/arm/include/asm/arch-am33xx/gpio.h | 12 ++++
arch/arm/include/asm/emif.h | 14 ++++
board/ti/am43xx/board.c | 93 +++++++++++++++++++++++++-
board/ti/am43xx/mux.c | 8 +++
7 files changed, 136 insertions(+), 19 deletions(-)
diff --git a/arch/arm/cpu/armv7/am33xx/ddr.c b/arch/arm/cpu/armv7/am33xx/ddr.c
index 243ec39..1ba2bb4 100644
--- a/arch/arm/cpu/armv7/am33xx/ddr.c
+++ b/arch/arm/cpu/armv7/am33xx/ddr.c
@@ -97,8 +97,10 @@ void config_sdram_emif4d5(const struct emif_regs *regs, int nr)
writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
- configure_mr(nr, 0);
- configure_mr(nr, 1);
+ if (emif_sdram_type() == EMIF_SDRAM_TYPE_LPDDR2) {
+ configure_mr(nr, 0);
+ configure_mr(nr, 1);
+ }
}
/**
diff --git a/arch/arm/cpu/armv7/omap-common/emif-common.c b/arch/arm/cpu/armv7/omap-common/emif-common.c
index b0e1caa..d8a15be 100644
--- a/arch/arm/cpu/armv7/omap-common/emif-common.c
+++ b/arch/arm/cpu/armv7/omap-common/emif-common.c
@@ -50,20 +50,6 @@ inline u32 emif_num(u32 base)
return 0;
}
-/*
- * Get SDRAM type connected to EMIF.
- * Assuming similar SDRAM parts are connected to both EMIF's
- * which is typically the case. So it is sufficient to get
- * SDRAM type from EMIF1.
- */
-u32 emif_sdram_type()
-{
- struct emif_reg_struct *emif = (struct emif_reg_struct *)EMIF1_BASE;
-
- return (readl(&emif->emif_sdram_config) &
- EMIF_REG_SDRAM_TYPE_MASK) >> EMIF_REG_SDRAM_TYPE_SHIFT;
-}
-
static inline u32 get_mr(u32 base, u32 cs, u32 mr_addr)
{
u32 mr;
diff --git a/arch/arm/include/asm/arch-am33xx/ddr_defs.h b/arch/arm/include/asm/arch-am33xx/ddr_defs.h
index c98ab7f..646e50f 100644
--- a/arch/arm/include/asm/arch-am33xx/ddr_defs.h
+++ b/arch/arm/include/asm/arch-am33xx/ddr_defs.h
@@ -138,6 +138,14 @@
#define LPDDR2_DATA2_IOCTRL_VALUE 0x20000294
#define LPDDR2_DATA3_IOCTRL_VALUE 0x20000294
+#define DDR3_ADDRCTRL_WD0_IOCTRL_VALUE 0x00000000
+#define DDR3_ADDRCTRL_WD1_IOCTRL_VALUE 0x00000000
+#define DDR3_ADDRCTRL_IOCTRL_VALUE 0x84
+#define DDR3_DATA0_IOCTRL_VALUE 0x84
+#define DDR3_DATA1_IOCTRL_VALUE 0x84
+#define DDR3_DATA2_IOCTRL_VALUE 0x84
+#define DDR3_DATA3_IOCTRL_VALUE 0x84
+
/**
* Configure DMM
*/
diff --git a/arch/arm/include/asm/arch-am33xx/gpio.h b/arch/arm/include/asm/arch-am33xx/gpio.h
index 13a047f..a1ffd49 100644
--- a/arch/arm/include/asm/arch-am33xx/gpio.h
+++ b/arch/arm/include/asm/arch-am33xx/gpio.h
@@ -13,4 +13,16 @@
#define AM33XX_GPIO2_BASE 0x481AC000
#define AM33XX_GPIO3_BASE 0x481AE000
+#define GPIO_22 22
+
+/* GPIO CTRL register */
+#define GPIO_CTRL_DISABLEMODULE_SHIFT 0
+#define GPIO_CTRL_DISABLEMODULE_MASK (1 << 0)
+#define GPIO_CTRL_ENABLEMODULE GPIO_CTRL_DISABLEMODULE_MASK
+
+/* GPIO OUTPUT ENABLE register */
+#define GPIO_OE_ENABLE(x) (1 << x)
+
+/* GPIO SETDATAOUT register */
+#define GPIO_SETDATAOUT(x) (1 << x)
#endif /* _GPIO_AM33xx_H */
diff --git a/arch/arm/include/asm/emif.h b/arch/arm/include/asm/emif.h
index ce6b229..b4a8c9f 100644
--- a/arch/arm/include/asm/emif.h
+++ b/arch/arm/include/asm/emif.h
@@ -1151,6 +1151,20 @@ static inline u32 get_emif_rev(u32 base)
>> EMIF_REG_MAJOR_REVISION_SHIFT;
}
+/*
+ * Get SDRAM type connected to EMIF.
+ * Assuming similar SDRAM parts are connected to both EMIF's
+ * which is typically the case. So it is sufficient to get
+ * SDRAM type from EMIF1.
+ */
+static inline u32 emif_sdram_type(void)
+{
+ struct emif_reg_struct *emif = (struct emif_reg_struct *)EMIF1_BASE;
+
+ return (readl(&emif->emif_sdram_config) &
+ EMIF_REG_SDRAM_TYPE_MASK) >> EMIF_REG_SDRAM_TYPE_SHIFT;
+}
+
/* assert macros */
#if defined(DEBUG)
#define emif_assert(c) ({ if (!(c)) for (;;); })
diff --git a/board/ti/am43xx/board.c b/board/ti/am43xx/board.c
index 5a013e3..ed87cd9 100644
--- a/board/ti/am43xx/board.c
+++ b/board/ti/am43xx/board.c
@@ -16,6 +16,7 @@
#include <asm/arch/sys_proto.h>
#include <asm/arch/mux.h>
#include <asm/arch/ddr_defs.h>
+#include <asm/arch/gpio.h>
#include <asm/emif.h>
#include "board.h"
@@ -179,10 +180,70 @@ const u32 ext_phy_ctrl_const_base_lpddr2[] = {
0x08102040
};
+const struct ctrl_ioregs ioregs_ddr3 = {
+ .cm0ioctl = DDR3_ADDRCTRL_IOCTRL_VALUE,
+ .cm1ioctl = DDR3_ADDRCTRL_WD0_IOCTRL_VALUE,
+ .cm2ioctl = DDR3_ADDRCTRL_WD1_IOCTRL_VALUE,
+ .dt0ioctl = DDR3_DATA0_IOCTRL_VALUE,
+ .dt1ioctl = DDR3_DATA0_IOCTRL_VALUE,
+ .dt2ioctrl = DDR3_DATA0_IOCTRL_VALUE,
+ .dt3ioctrl = DDR3_DATA0_IOCTRL_VALUE,
+ .emif_sdram_config_ext = 0x0043,
+};
+
+const struct emif_regs ddr3_emif_regs_400Mhz = {
+ .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 = 0x0E084008,
+ .emif_ddr_ext_phy_ctrl_1 = 0x08020080,
+ .emif_ddr_ext_phy_ctrl_2 = 0x00400040,
+ .emif_ddr_ext_phy_ctrl_3 = 0x00400040,
+ .emif_ddr_ext_phy_ctrl_4 = 0x00400040,
+ .emif_ddr_ext_phy_ctrl_5 = 0x00400040,
+ .emif_rd_wr_lvl_rmp_win = 0x0,
+ .emif_rd_wr_lvl_rmp_ctl = 0x0,
+ .emif_rd_wr_lvl_ctl = 0x0,
+ .emif_rd_wr_exec_thresh = 0x00000405
+};
+
+const u32 ext_phy_ctrl_const_base_ddr3[] = {
+ 0x00400040,
+ 0x00350035,
+ 0x00350035,
+ 0x00350035,
+ 0x00350035,
+ 0x00350035,
+ 0x00000000,
+ 0x00000000,
+ 0x00000000,
+ 0x00000000,
+ 0x00000000,
+ 0x00340034,
+ 0x00340034,
+ 0x00340034,
+ 0x00340034,
+ 0x00340034,
+ 0x0,
+ 0x0,
+ 0x40000000,
+ 0x08102040
+};
+
void emif_get_ext_phy_ctrl_const_regs(const u32 **regs, u32 *size)
{
- *regs = ext_phy_ctrl_const_base_lpddr2;
- *size = ARRAY_SIZE(ext_phy_ctrl_const_base_lpddr2);
+ if (board_is_eposevm()) {
+ *regs = ext_phy_ctrl_const_base_lpddr2;
+ *size = ARRAY_SIZE(ext_phy_ctrl_const_base_lpddr2);
+ } else if (board_is_gpevm()) {
+ *regs = ext_phy_ctrl_const_base_ddr3;
+ *size = ARRAY_SIZE(ext_phy_ctrl_const_base_ddr3);
+ }
return;
}
@@ -280,9 +341,35 @@ void set_mux_conf_regs(void)
enable_board_pin_mux();
}
+static void enable_vtt_regulator(void)
+{
+ u32 temp;
+
+ /* enable module */
+ writel(GPIO_CTRL_ENABLEMODULE, AM33XX_GPIO0_BASE + OMAP_GPIO_CTRL);
+
+ /* enable output for GPIO0_22 */
+ writel(GPIO_SETDATAOUT(GPIO_22),
+ AM33XX_GPIO0_BASE + OMAP_GPIO_SETDATAOUT);
+ temp = readl(AM33XX_GPIO0_BASE + OMAP_GPIO_OE);
+ temp = temp & ~(GPIO_OE_ENABLE(GPIO_22));
+ writel(temp, AM33XX_GPIO0_BASE + OMAP_GPIO_OE);
+}
+
void sdram_init(void)
{
- config_ddr(0, &ioregs_lpddr2, NULL, NULL, &emif_regs_lpddr2, 0);
+ /*
+ * EPOS EVM has 1GB LPDDR2 connected to EMIF.
+ * GP EMV has 1GB DDR3 connected to EMIF
+ * along with VTT regulator.
+ */
+ if (board_is_eposevm()) {
+ config_ddr(0, &ioregs_lpddr2, NULL, NULL, &emif_regs_lpddr2, 0);
+ } else if (board_is_gpevm()) {
+ enable_vtt_regulator();
+ config_ddr(0, &ioregs_ddr3, NULL, NULL,
+ &ddr3_emif_regs_400Mhz, 0);
+ }
}
#endif
diff --git a/board/ti/am43xx/mux.c b/board/ti/am43xx/mux.c
index a2d72dd..810b194 100644
--- a/board/ti/am43xx/mux.c
+++ b/board/ti/am43xx/mux.c
@@ -33,6 +33,11 @@ static struct module_pin_mux i2c0_pin_mux[] = {
{-1},
};
+static struct module_pin_mux gpio0_22_pin_mux[] = {
+ {OFFSET(ddr_ba2), (MODE(9) | PULLUP_EN)}, /* GPIO0_22 */
+ {-1},
+};
+
void enable_uart0_pin_mux(void)
{
configure_module_pin_mux(uart0_pin_mux);
@@ -42,6 +47,9 @@ void enable_board_pin_mux(void)
{
configure_module_pin_mux(mmc0_pin_mux);
configure_module_pin_mux(i2c0_pin_mux);
+
+ if (board_is_gpevm())
+ configure_module_pin_mux(gpio0_22_pin_mux);
}
void enable_i2c0_pin_mux(void)
--
1.7.9.5
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