[U-Boot] [PATCH 3/3] omap4: IO settings
Aneesh V
aneesh at ti.com
Tue Aug 9 14:43:41 CEST 2011
Tuning some IO settings for better performance and power.
And consolidate all such IO settings at one place.
Signed-off-by: Aneesh V <aneesh at ti.com>
---
arch/arm/cpu/armv7/omap4/board.c | 57 +++++++++++++++++++++++++++++++
arch/arm/cpu/armv7/omap4/emif.c | 25 -------------
arch/arm/include/asm/arch-omap4/emif.h | 14 +------
arch/arm/include/asm/arch-omap4/omap4.h | 35 ++++++++++++++++++-
4 files changed, 92 insertions(+), 39 deletions(-)
diff --git a/arch/arm/cpu/armv7/omap4/board.c b/arch/arm/cpu/armv7/omap4/board.c
index 5943d61..bad56e3 100644
--- a/arch/arm/cpu/armv7/omap4/board.c
+++ b/arch/arm/cpu/armv7/omap4/board.c
@@ -70,6 +70,62 @@ u32 omap_boot_mode(void)
{
return omap4_boot_mode;
}
+
+/*
+ * Some tuning of IOs for optimal power and performance
+ */
+static void do_io_settings(void)
+{
+ u32 lpddr2io;
+ struct control_lpddr2io_regs *lpddr2io_regs =
+ (struct control_lpddr2io_regs *)LPDDR2_IO_REGS_BASE;
+ struct omap4_sys_ctrl_regs *const ctrl =
+ (struct omap4_sys_ctrl_regs *)SYSCTRL_GENERAL_CORE_BASE;
+
+ u32 omap4_rev = omap_revision();
+
+ if (omap4_rev == OMAP4430_ES1_0)
+ lpddr2io = CONTROL_LPDDR2IO_SLEW_125PS_DRV8_PULL_DOWN;
+ else if (omap4_rev == OMAP4430_ES2_0)
+ lpddr2io = CONTROL_LPDDR2IO_SLEW_325PS_DRV8_GATE_KEEPER;
+ else
+ lpddr2io = CONTROL_LPDDR2IO_SLEW_315PS_DRV12_PULL_DOWN;
+
+ writel(lpddr2io, &lpddr2io_regs->control_lpddr2io1_0);
+ writel(lpddr2io, &lpddr2io_regs->control_lpddr2io1_1);
+ /* No pull for GR10 as per hw team's recommendation */
+ writel(lpddr2io & ~LPDDR2IO_GR10_WD_MASK,
+ &lpddr2io_regs->control_lpddr2io1_2);
+ writel(lpddr2io, &lpddr2io_regs->control_lpddr2io2_0);
+ writel(lpddr2io, &lpddr2io_regs->control_lpddr2io2_1);
+ /* No pull for GR10 as per hw team's recommendation */
+ writel(lpddr2io & ~LPDDR2IO_GR10_WD_MASK,
+ &lpddr2io_regs->control_lpddr2io2_2);
+
+ /*
+ * Some of these settings (TRIM values) come from eFuse and are
+ * in turn programmed in the eFuse at manufacturing time after
+ * calibration of the device. Do the software over-ride only if
+ * the device is not correctly trimmed
+ */
+ if (!(readl(&ctrl->control_std_fuse_opp_bgap) & 0xFFFF)) {
+
+ writel(LDOSRAM_VOLT_CTRL_OVERRIDE,
+ &ctrl->control_ldosram_iva_voltage_ctrl);
+
+ writel(LDOSRAM_VOLT_CTRL_OVERRIDE,
+ &ctrl->control_ldosram_mpu_voltage_ctrl);
+
+ writel(LDOSRAM_VOLT_CTRL_OVERRIDE,
+ &ctrl->control_ldosram_core_voltage_ctrl);
+ }
+
+ if (!readl(&ctrl->control_efuse_1))
+ writel(CONTROL_EFUSE_1_OVERRIDE, &ctrl->control_efuse_1);
+
+ if (!readl(&ctrl->control_efuse_2))
+ writel(CONTROL_EFUSE_2_OVERRIDE, &ctrl->control_efuse_2);
+}
#endif
void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
@@ -197,6 +253,7 @@ void s_init(void)
set_mux_conf_regs();
#ifdef CONFIG_SPL_BUILD
preloader_console_init();
+ do_io_settings();
#endif
prcm_init();
#ifdef CONFIG_SPL_BUILD
diff --git a/arch/arm/cpu/armv7/omap4/emif.c b/arch/arm/cpu/armv7/omap4/emif.c
index 8c46464..988b205 100644
--- a/arch/arm/cpu/armv7/omap4/emif.c
+++ b/arch/arm/cpu/armv7/omap4/emif.c
@@ -1063,30 +1063,6 @@ static void do_sdram_init(u32 base)
debug("<<do_sdram_init() %x\n", base);
}
-void sdram_init_pads(void)
-{
- u32 lpddr2io;
- struct control_lpddr2io_regs *lpddr2io_regs =
- (struct control_lpddr2io_regs *)LPDDR2_IO_REGS_BASE;
- u32 omap4_rev = omap_revision();
-
- if (omap4_rev == OMAP4430_ES1_0)
- lpddr2io = CONTROL_LPDDR2IO_SLEW_125PS_DRV8_PULL_DOWN;
- else if (omap4_rev == OMAP4430_ES2_0)
- lpddr2io = CONTROL_LPDDR2IO_SLEW_325PS_DRV8_GATE_KEEPER;
- else
- return; /* Post ES2.1 reset values will work */
-
- writel(lpddr2io, &lpddr2io_regs->control_lpddr2io1_0);
- writel(lpddr2io, &lpddr2io_regs->control_lpddr2io1_1);
- writel(lpddr2io, &lpddr2io_regs->control_lpddr2io1_2);
- writel(lpddr2io, &lpddr2io_regs->control_lpddr2io2_0);
- writel(lpddr2io, &lpddr2io_regs->control_lpddr2io2_1);
- writel(lpddr2io, &lpddr2io_regs->control_lpddr2io2_2);
-
- writel(CONTROL_EFUSE_2_NMOS_PMOS_PTV_CODE_1, CONTROL_EFUSE_2);
-}
-
static void emif_post_init_config(u32 base)
{
struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
@@ -1243,7 +1219,6 @@ void sdram_init(void)
debug("in_sdram = %d\n", in_sdram);
if (!in_sdram) {
- sdram_init_pads();
bypass_dpll(&prcm->cm_clkmode_dpll_core);
}
diff --git a/arch/arm/include/asm/arch-omap4/emif.h b/arch/arm/include/asm/arch-omap4/emif.h
index 6845c65..f24e944 100644
--- a/arch/arm/include/asm/arch-omap4/emif.h
+++ b/arch/arm/include/asm/arch-omap4/emif.h
@@ -593,17 +593,6 @@ struct dmm_lisa_map_regs {
u32 dmm_lisa_map_3;
};
-struct control_lpddr2io_regs {
- u32 control_lpddr2io1_0;
- u32 control_lpddr2io1_1;
- u32 control_lpddr2io1_2;
- u32 control_lpddr2io1_3;
- u32 control_lpddr2io2_0;
- u32 control_lpddr2io2_1;
- u32 control_lpddr2io2_2;
- u32 control_lpddr2io2_3;
-};
-
#define CS0 0
#define CS1 1
/* The maximum frequency at which the LPDDR2 interface can operate in Hz*/
@@ -826,7 +815,8 @@ struct control_lpddr2io_regs {
/* LPDDR2 IO regs */
#define CONTROL_LPDDR2IO_SLEW_125PS_DRV8_PULL_DOWN 0x1C1C1C1C
#define CONTROL_LPDDR2IO_SLEW_325PS_DRV8_GATE_KEEPER 0x9E9E9E9E
-
+#define CONTROL_LPDDR2IO_SLEW_315PS_DRV12_PULL_DOWN 0x7C7C7C7C
+#define LPDDR2IO_GR10_WD_MASK (3 << 17)
/* CONTROL_EFUSE_2 */
#define CONTROL_EFUSE_2_NMOS_PMOS_PTV_CODE_1 0x00ffc000
diff --git a/arch/arm/include/asm/arch-omap4/omap4.h b/arch/arm/include/asm/arch-omap4/omap4.h
index 9aad0e6..8e499f4 100644
--- a/arch/arm/include/asm/arch-omap4/omap4.h
+++ b/arch/arm/include/asm/arch-omap4/omap4.h
@@ -54,8 +54,6 @@
/* LPDDR2 IO regs */
#define LPDDR2_IO_REGS_BASE 0x4A100638
-#define CONTROL_EFUSE_2 0x4A100704
-
/* CONTROL_ID_CODE */
#define CONTROL_ID_CODE 0x4A002204
@@ -84,6 +82,9 @@
/* GPMC */
#define OMAP44XX_GPMC_BASE 0x50000000
+/* SYSTEM CONTROL MODULE */
+#define SYSCTRL_GENERAL_CORE_BASE 0x4A002000
+
/*
* Hardware Register Details
*/
@@ -108,6 +109,12 @@
#define PRM_RSTCTRL PRM_DEVICE_BASE
#define PRM_RSTCTRL_RESET 0x01
+/* Control Module */
+#define LDOSRAM_ACTMODE_VSET_IN_MASK (0x1F << 5)
+#define LDOSRAM_VOLT_CTRL_OVERRIDE 0x0401040f
+#define CONTROL_EFUSE_1_OVERRIDE 0x1C4D0110
+#define CONTROL_EFUSE_2_OVERRIDE 0x00084000
+
#ifndef __ASSEMBLY__
struct s32ktimer {
@@ -115,6 +122,30 @@ struct s32ktimer {
unsigned int s32k_cr; /* 0x10 */
};
+struct omap4_sys_ctrl_regs {
+ unsigned int pad1[129];
+ unsigned int control_id_code; /* 0x4A002204 */
+ unsigned int pad11[22];
+ unsigned int control_std_fuse_opp_bgap; /* 0x4a002260 */
+ unsigned int pad2[47];
+ unsigned int control_ldosram_iva_voltage_ctrl; /* 0x4A002320 */
+ unsigned int control_ldosram_mpu_voltage_ctrl; /* 0x4A002324 */
+ unsigned int control_ldosram_core_voltage_ctrl; /* 0x4A002328 */
+ unsigned int pad3[260341];
+ unsigned int control_efuse_1; /* 0x4A100700 */
+ unsigned int control_efuse_2; /* 0x4A100704 */
+};
+
+struct control_lpddr2io_regs {
+ unsigned int control_lpddr2io1_0;
+ unsigned int control_lpddr2io1_1;
+ unsigned int control_lpddr2io1_2;
+ unsigned int control_lpddr2io1_3;
+ unsigned int control_lpddr2io2_0;
+ unsigned int control_lpddr2io2_1;
+ unsigned int control_lpddr2io2_2;
+ unsigned int control_lpddr2io2_3;
+};
#endif /* __ASSEMBLY__ */
/*
--
1.7.0.4
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