aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAneesh V <aneesh@ti.com>2011-09-08 11:05:56 -0400
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2011-09-13 08:25:16 +0200
commit4ecfcfaa9ed1bb2ee73585752f9c36a12d1600c6 (patch)
tree94b5cde341423732ec4a7f7c3b0ea6d2066b5b2b
parent025bc4254ba3d501cf2af49ae1d91d5b2e7c529d (diff)
downloadu-boot-linaro-stable-4ecfcfaa9ed1bb2ee73585752f9c36a12d1600c6.tar.gz
omap4: IO settings
Tuning some IO settings for better performance and power. And consolidate all such IO settings at one place. Signed-off-by: Aneesh V <aneesh@ti.com> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
-rw-r--r--arch/arm/cpu/armv7/omap4/board.c62
-rw-r--r--arch/arm/cpu/armv7/omap4/emif.c25
-rw-r--r--arch/arm/include/asm/arch-omap4/emif.h18
-rw-r--r--arch/arm/include/asm/arch-omap4/omap4.h45
4 files changed, 105 insertions, 45 deletions
diff --git a/arch/arm/cpu/armv7/omap4/board.c b/arch/arm/cpu/armv7/omap4/board.c
index 69a0ce551..309b244ad 100644
--- a/arch/arm/cpu/armv7/omap4/board.c
+++ b/arch/arm/cpu/armv7/omap4/board.c
@@ -70,6 +70,67 @@ 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;
+
+ /* EMIF1 */
+ 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(CONTROL_LPDDR2IO_3_VAL, &lpddr2io_regs->control_lpddr2io1_3);
+
+ /* EMIF2 */
+ 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);
+ writel(CONTROL_LPDDR2IO_3_VAL, &lpddr2io_regs->control_lpddr2io2_3);
+
+ /*
+ * 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 +258,7 @@ 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 8c4646498..988b2050f 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 6845c65b2..3a549bad5 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*/
@@ -823,13 +812,6 @@ struct control_lpddr2io_regs {
/* MR16 value: refresh full array(no partial array self refresh) */
#define MR16_REF_FULL_ARRAY 0
-/* LPDDR2 IO regs */
-#define CONTROL_LPDDR2IO_SLEW_125PS_DRV8_PULL_DOWN 0x1C1C1C1C
-#define CONTROL_LPDDR2IO_SLEW_325PS_DRV8_GATE_KEEPER 0x9E9E9E9E
-
-/* CONTROL_EFUSE_2 */
-#define CONTROL_EFUSE_2_NMOS_PMOS_PTV_CODE_1 0x00ffc000
-
/*
* Maximum number of entries we keep in our array of timing tables
* We need not keep all the speed bins supported by the device
diff --git a/arch/arm/include/asm/arch-omap4/omap4.h b/arch/arm/include/asm/arch-omap4/omap4.h
index 7ff46d771..a6e1e42e2 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 +109,22 @@
#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
+
+/* 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)
+#define CONTROL_LPDDR2IO_3_VAL 0xA0888C00
+
+/* CONTROL_EFUSE_2 */
+#define CONTROL_EFUSE_2_NMOS_PMOS_PTV_CODE_1 0x00ffc000
+
#ifndef __ASSEMBLY__
struct s32ktimer {
@@ -115,6 +132,30 @@ 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__ */
/*