OMAP3+: introduce generic ABB support

Adaptive Body Biasing (ABB) modulates transistor bias voltages
dynamically in order to optimize switching speed versus leakage.
Adaptive Body-Bias ldos are present for some voltage domains
starting with OMAP3630. There are three modes of operation:

* Bypass - the default, it just follows the vdd voltage
* Foward Body-Bias - applies voltage bias to increase transistor
  performance at the cost of power.  Used to operate safely at high
  OPPs.
* Reverse Body-Bias - applies voltage bias to decrease leakage and
  save power.  Used to save power at lower OPPs.

Signed-off-by: Andrii Tseglytskyi <andrii.tseglytskyi@ti.com>
Acked-by: Nishanth Menon <nm@ti.com>

4 files changed, 50 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-omap3/omap3.h b/arch/arm/include/asm/arch-omap3/omap3.h
index 2b5e9aeae1..c57599a938 100644
--- a/arch/arm/include/asm/arch-omap3/omap3.h
+++ b/arch/arm/include/asm/arch-omap3/omap3.h
@@ -253,4 +253,11 @@ struct gpio {
 
 #define OMAP3_EMU_HAL_START_HAL_CRITICAL	4
 
+/* ABB settings */
+#define OMAP_ABB_SETTLING_TIME		30
+#define OMAP_ABB_CLOCK_CYCLES		8
+
+/* ABB tranxdone mask */
+#define OMAP_ABB_MPU_TXDONE_MASK	(0x1 << 26)
+
 #endif
diff --git a/arch/arm/include/asm/arch-omap4/omap.h b/arch/arm/include/asm/arch-omap4/omap.h
index e9a6ffeb83..55a07605b8 100644
--- a/arch/arm/include/asm/arch-omap4/omap.h
+++ b/arch/arm/include/asm/arch-omap4/omap.h
@@ -143,4 +143,12 @@ struct s32ktimer {
 #define NON_SECURE_SRAM_END	0x4030E000	/* Not inclusive */
 /* base address for indirect vectors (internal boot mode) */
 #define SRAM_ROM_VECT_BASE	0x4030D000
+
+/* ABB settings */
+#define OMAP_ABB_SETTLING_TIME		50
+#define OMAP_ABB_CLOCK_CYCLES		16
+
+/* ABB tranxdone mask */
+#define OMAP_ABB_MPU_TXDONE_MASK	(0x1 << 7)
+
 #endif
diff --git a/arch/arm/include/asm/arch-omap5/omap.h b/arch/arm/include/asm/arch-omap5/omap.h
index 4f43a903d8..1c1a64bd23 100644
--- a/arch/arm/include/asm/arch-omap5/omap.h
+++ b/arch/arm/include/asm/arch-omap5/omap.h
@@ -215,6 +215,19 @@ struct s32ktimer {
 #define SRCODE_OVERRIDE_SEL_XS_SHIFT	0
 #define SRCODE_OVERRIDE_SEL_XS_MASK	(1 << 0)
 
+/* ABB settings */
+#define OMAP_ABB_SETTLING_TIME		50
+#define OMAP_ABB_CLOCK_CYCLES		16
+
+/* ABB tranxdone mask */
+#define OMAP_ABB_MPU_TXDONE_MASK		(0x1 << 7)
+
+/* ABB efuse masks */
+#define OMAP5_ABB_FUSE_VSET_MASK		(0x1F << 24)
+#define OMAP5_ABB_FUSE_ENABLE_MASK		(0x1 << 29)
+#define OMAP5_ABB_LDOVBBMPU_MUX_CTRL_MASK	(0x1 << 10)
+#define OMAP5_ABB_LDOVBBMPU_VSET_OUT_MASK	(0x1f << 0)
+
 #ifndef __ASSEMBLY__
 struct srcomp_params {
 	s8 divide_factor;
diff --git a/arch/arm/include/asm/omap_common.h b/arch/arm/include/asm/omap_common.h
index ee7b188d3a..f8f3719bd6 100644
--- a/arch/arm/include/asm/omap_common.h
+++ b/arch/arm/include/asm/omap_common.h
@@ -242,6 +242,8 @@ struct prcm_regs {
 	u32 cm_l3init_fsusb_clkctrl;
 	u32 cm_l3init_ocp2scp1_clkctrl;
 
+	u32 prm_irqstatus_mpu_2;
+
 	/* cm2.l4per */
 	u32 cm_l4per_clkstctrl;
 	u32 cm_l4per_dynamicdep;
@@ -328,6 +330,8 @@ struct prcm_regs {
 	u32 prm_sldo_mpu_ctrl;
 	u32 prm_sldo_mm_setup;
 	u32 prm_sldo_mm_ctrl;
+	u32 prm_abbldo_mpu_setup;
+	u32 prm_abbldo_mpu_ctrl;
 
 	u32 cm_div_m4_dpll_core;
 	u32 cm_div_m5_dpll_core;
@@ -350,6 +354,7 @@ struct prcm_regs {
 
 struct omap_sys_ctrl_regs {
 	u32 control_status;
+	u32 control_std_fuse_opp_vdd_mpu_2;
 	u32 control_core_mmr_lock1;
 	u32 control_core_mmr_lock2;
 	u32 control_core_mmr_lock3;
@@ -419,6 +424,7 @@ struct omap_sys_ctrl_regs {
 	u32 control_port_emif2_sdram_config;
 	u32 control_emif1_sdram_config_ext;
 	u32 control_emif2_sdram_config_ext;
+	u32 control_wkup_ldovbb_mpu_voltage_ctrl;
 	u32 control_smart1nopmio_padconf_0;
 	u32 control_smart1nopmio_padconf_1;
 	u32 control_padconf_mode;
@@ -545,6 +551,9 @@ void enable_non_essential_clocks(void);
 void scale_vcores(struct vcores_data const *);
 u32 get_offset_code(u32 volt_offset, struct pmic_data *pmic);
 void do_scale_vcore(u32 vcore_reg, u32 volt_mv, struct pmic_data *pmic);
+void abb_setup(u32 fuse, u32 ldovbb, u32 setup, u32 control,
+	       u32 txdone, u32 txdone_mask, u32 opp);
+s8 abb_setup_ldovbb(u32 fuse, u32 ldovbb);
 
 /* Max value for DPLL multiplier M */
 #define OMAP_DPLL_MAX_N	127
@@ -555,6 +564,19 @@ void do_scale_vcore(u32 vcore_reg, u32 volt_mv, struct pmic_data *pmic);
 #define OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL	2
 #define OMAP_INIT_CONTEXT_UBOOT_AFTER_CH	3
 
+/* ABB */
+#define OMAP_ABB_NOMINAL_OPP		0
+#define OMAP_ABB_FAST_OPP		1
+#define OMAP_ABB_SLOW_OPP		3
+#define OMAP_ABB_CONTROL_FAST_OPP_SEL_MASK		(0x1 << 0)
+#define OMAP_ABB_CONTROL_SLOW_OPP_SEL_MASK		(0x1 << 1)
+#define OMAP_ABB_CONTROL_OPP_CHANGE_MASK		(0x1 << 2)
+#define OMAP_ABB_CONTROL_SR2_IN_TRANSITION_MASK		(0x1 << 6)
+#define OMAP_ABB_SETUP_SR2EN_MASK			(0x1 << 0)
+#define OMAP_ABB_SETUP_ACTIVE_FBB_SEL_MASK		(0x1 << 2)
+#define OMAP_ABB_SETUP_ACTIVE_RBB_SEL_MASK		(0x1 << 1)
+#define OMAP_ABB_SETUP_SR2_WTCNT_VALUE_MASK		(0xff << 8)
+
 static inline u32 omap_revision(void)
 {
 	extern u32 *const omap_si_rev;