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Diffstat (limited to 'kernel/arch/arm/mach-omap2/clockdomain.h')
| -rw-r--r-- | kernel/arch/arm/mach-omap2/clockdomain.h | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-omap2/clockdomain.h b/kernel/arch/arm/mach-omap2/clockdomain.h new file mode 100644 index 000000000..77bab5fb6 --- /dev/null +++ b/kernel/arch/arm/mach-omap2/clockdomain.h @@ -0,0 +1,238 @@ +/* + * OMAP2/3 clockdomain framework functions + * + * Copyright (C) 2008, 2012 Texas Instruments, Inc. + * Copyright (C) 2008-2011 Nokia Corporation + * + * Paul Walmsley + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H +#define __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H + +#include <linux/init.h> + +#include "powerdomain.h" +#include "clock.h" + +/* + * Clockdomain flags + * + * XXX Document CLKDM_CAN_* flags + * + * CLKDM_NO_AUTODEPS: Prevent "autodeps" from being added/removed from this + * clockdomain. (Currently, this applies to OMAP3 clockdomains only.) + * CLKDM_ACTIVE_WITH_MPU: The PRCM guarantees that this clockdomain is + * active whenever the MPU is active. True for interconnects and + * the WKUP clockdomains. + * CLKDM_MISSING_IDLE_REPORTING: The idle status of the IP blocks and + * clocks inside this clockdomain are not taken into account by + * the PRCM when determining whether the clockdomain is idle. + * Without this flag, if the clockdomain is set to + * hardware-supervised idle mode, the PRCM may transition the + * enclosing powerdomain to a low power state, even when devices + * inside the clockdomain and powerdomain are in use. (An example + * of such a clockdomain is the EMU clockdomain on OMAP3/4.) If + * this flag is set, and the clockdomain does not support the + * force-sleep mode, then the HW_AUTO mode will be used to put the + * clockdomain to sleep. Similarly, if the clockdomain supports + * the force-wakeup mode, then it will be used whenever a clock or + * IP block inside the clockdomain is active, rather than the + * HW_AUTO mode. + */ +#define CLKDM_CAN_FORCE_SLEEP (1 << 0) +#define CLKDM_CAN_FORCE_WAKEUP (1 << 1) +#define CLKDM_CAN_ENABLE_AUTO (1 << 2) +#define CLKDM_CAN_DISABLE_AUTO (1 << 3) +#define CLKDM_NO_AUTODEPS (1 << 4) +#define CLKDM_ACTIVE_WITH_MPU (1 << 5) +#define CLKDM_MISSING_IDLE_REPORTING (1 << 6) + +#define CLKDM_CAN_HWSUP (CLKDM_CAN_ENABLE_AUTO | CLKDM_CAN_DISABLE_AUTO) +#define CLKDM_CAN_SWSUP (CLKDM_CAN_FORCE_SLEEP | CLKDM_CAN_FORCE_WAKEUP) +#define CLKDM_CAN_HWSUP_SWSUP (CLKDM_CAN_SWSUP | CLKDM_CAN_HWSUP) + +/** + * struct clkdm_autodep - clkdm deps to add when entering/exiting hwsup mode + * @clkdm: clockdomain to add wkdep+sleepdep on - set name member only + * + * A clockdomain that should have wkdeps and sleepdeps added when a + * clockdomain should stay active in hwsup mode; and conversely, + * removed when the clockdomain should be allowed to go inactive in + * hwsup mode. + * + * Autodeps are deprecated and should be removed after + * omap_hwmod-based fine-grained module idle control is added. + */ +struct clkdm_autodep { + union { + const char *name; + struct clockdomain *ptr; + } clkdm; +}; + +/** + * struct clkdm_dep - encode dependencies between clockdomains + * @clkdm_name: clockdomain name + * @clkdm: pointer to the struct clockdomain of @clkdm_name + * @wkdep_usecount: Number of wakeup dependencies causing this clkdm to wake + * @sleepdep_usecount: Number of sleep deps that could prevent clkdm from idle + * + * Statically defined. @clkdm is resolved from @clkdm_name at runtime and + * should not be pre-initialized. + * + * XXX Should also include hardware (fixed) dependencies. + */ +struct clkdm_dep { + const char *clkdm_name; + struct clockdomain *clkdm; + s16 wkdep_usecount; + s16 sleepdep_usecount; +}; + +/* Possible flags for struct clockdomain._flags */ +#define _CLKDM_FLAG_HWSUP_ENABLED BIT(0) + +struct omap_hwmod; + +/** + * struct clockdomain - OMAP clockdomain + * @name: clockdomain name + * @pwrdm: powerdomain containing this clockdomain + * @clktrctrl_reg: CLKSTCTRL reg for the given clock domain + * @clktrctrl_mask: CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg + * @flags: Clockdomain capability flags + * @_flags: Flags for use only by internal clockdomain code + * @dep_bit: Bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit + * @prcm_partition: (OMAP4 only) PRCM partition ID for this clkdm's registers + * @cm_inst: (OMAP4 only) CM instance register offset + * @clkdm_offs: (OMAP4 only) CM clockdomain register offset + * @wkdep_srcs: Clockdomains that can be told to wake this powerdomain up + * @sleepdep_srcs: Clockdomains that can be told to keep this clkdm from inact + * @usecount: Usecount tracking + * @node: list_head to link all clockdomains together + * + * @prcm_partition should be a macro from mach-omap2/prcm44xx.h (OMAP4 only) + * @cm_inst should be a macro ending in _INST from the OMAP4 CM instance + * definitions (OMAP4 only) + * @clkdm_offs should be a macro ending in _CDOFFS from the OMAP4 CM instance + * definitions (OMAP4 only) + */ +struct clockdomain { + const char *name; + union { + const char *name; + struct powerdomain *ptr; + } pwrdm; + const u16 clktrctrl_mask; + const u8 flags; + u8 _flags; + const u8 dep_bit; + const u8 prcm_partition; + const u16 cm_inst; + const u16 clkdm_offs; + struct clkdm_dep *wkdep_srcs; + struct clkdm_dep *sleepdep_srcs; + int usecount; + struct list_head node; +}; + +/** + * struct clkdm_ops - Arch specific function implementations + * @clkdm_add_wkdep: Add a wakeup dependency between clk domains + * @clkdm_del_wkdep: Delete a wakeup dependency between clk domains + * @clkdm_read_wkdep: Read wakeup dependency state between clk domains + * @clkdm_clear_all_wkdeps: Remove all wakeup dependencies from the clk domain + * @clkdm_add_sleepdep: Add a sleep dependency between clk domains + * @clkdm_del_sleepdep: Delete a sleep dependency between clk domains + * @clkdm_read_sleepdep: Read sleep dependency state between clk domains + * @clkdm_clear_all_sleepdeps: Remove all sleep dependencies from the clk domain + * @clkdm_sleep: Force a clockdomain to sleep + * @clkdm_wakeup: Force a clockdomain to wakeup + * @clkdm_allow_idle: Enable hw supervised idle transitions for clock domain + * @clkdm_deny_idle: Disable hw supervised idle transitions for clock domain + * @clkdm_clk_enable: Put the clkdm in right state for a clock enable + * @clkdm_clk_disable: Put the clkdm in right state for a clock disable + */ +struct clkdm_ops { + int (*clkdm_add_wkdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2); + int (*clkdm_del_wkdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2); + int (*clkdm_read_wkdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2); + int (*clkdm_clear_all_wkdeps)(struct clockdomain *clkdm); + int (*clkdm_add_sleepdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2); + int (*clkdm_del_sleepdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2); + int (*clkdm_read_sleepdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2); + int (*clkdm_clear_all_sleepdeps)(struct clockdomain *clkdm); + int (*clkdm_sleep)(struct clockdomain *clkdm); + int (*clkdm_wakeup)(struct clockdomain *clkdm); + void (*clkdm_allow_idle)(struct clockdomain *clkdm); + void (*clkdm_deny_idle)(struct clockdomain *clkdm); + int (*clkdm_clk_enable)(struct clockdomain *clkdm); + int (*clkdm_clk_disable)(struct clockdomain *clkdm); +}; + +int clkdm_register_platform_funcs(struct clkdm_ops *co); +int clkdm_register_autodeps(struct clkdm_autodep *ia); +int clkdm_register_clkdms(struct clockdomain **c); +int clkdm_complete_init(void); + +struct clockdomain *clkdm_lookup(const char *name); + +int clkdm_for_each(int (*fn)(struct clockdomain *clkdm, void *user), + void *user); +struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm); + +int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2); +int clkdm_del_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2); +int clkdm_read_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2); +int clkdm_clear_all_wkdeps(struct clockdomain *clkdm); +int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2); +int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2); +int clkdm_read_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2); +int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm); + +void clkdm_allow_idle_nolock(struct clockdomain *clkdm); +void clkdm_allow_idle(struct clockdomain *clkdm); +void clkdm_deny_idle_nolock(struct clockdomain *clkdm); +void clkdm_deny_idle(struct clockdomain *clkdm); +bool clkdm_in_hwsup(struct clockdomain *clkdm); +bool clkdm_missing_idle_reporting(struct clockdomain *clkdm); + +int clkdm_wakeup_nolock(struct clockdomain *clkdm); +int clkdm_wakeup(struct clockdomain *clkdm); +int clkdm_sleep_nolock(struct clockdomain *clkdm); +int clkdm_sleep(struct clockdomain *clkdm); + +int clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk); +int clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk); +int clkdm_hwmod_enable(struct clockdomain *clkdm, struct omap_hwmod *oh); +int clkdm_hwmod_disable(struct clockdomain *clkdm, struct omap_hwmod *oh); + +extern void __init omap242x_clockdomains_init(void); +extern void __init omap243x_clockdomains_init(void); +extern void __init omap3xxx_clockdomains_init(void); +extern void __init am33xx_clockdomains_init(void); +extern void __init ti81xx_clockdomains_init(void); +extern void __init omap44xx_clockdomains_init(void); +extern void __init omap54xx_clockdomains_init(void); +extern void __init dra7xx_clockdomains_init(void); +void am43xx_clockdomains_init(void); + +extern void clkdm_add_autodeps(struct clockdomain *clkdm); +extern void clkdm_del_autodeps(struct clockdomain *clkdm); + +extern struct clkdm_ops omap2_clkdm_operations; +extern struct clkdm_ops omap3_clkdm_operations; +extern struct clkdm_ops omap4_clkdm_operations; +extern struct clkdm_ops am33xx_clkdm_operations; +extern struct clkdm_ops am43xx_clkdm_operations; + +extern struct clkdm_dep gfx_24xx_wkdeps[]; +extern struct clkdm_dep dsp_24xx_wkdeps[]; +extern struct clockdomain wkup_common_clkdm; + +#endif |