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Diffstat (limited to 'kernel/arch/arm/mach-omap2/cm.h')
| -rw-r--r-- | kernel/arch/arm/mach-omap2/cm.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-omap2/cm.h b/kernel/arch/arm/mach-omap2/cm.h new file mode 100644 index 000000000..1fe3e6b83 --- /dev/null +++ b/kernel/arch/arm/mach-omap2/cm.h @@ -0,0 +1,78 @@ +/* + * OMAP2+ Clock Management prototypes + * + * Copyright (C) 2007-2009, 2012 Texas Instruments, Inc. + * Copyright (C) 2007-2009 Nokia Corporation + * + * Written by 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_ASM_MACH_OMAP2_CM_H +#define __ARCH_ASM_MACH_OMAP2_CM_H + +/* + * MAX_MODULE_READY_TIME: max duration in microseconds to wait for the + * PRCM to request that a module exit the inactive state in the case of + * OMAP2 & 3. + * In the case of OMAP4 this is the max duration in microseconds for the + * module to reach the functionnal state from an inactive state. + */ +#define MAX_MODULE_READY_TIME 2000 + +# ifndef __ASSEMBLER__ +extern void __iomem *cm_base; +extern void __iomem *cm2_base; +extern void omap2_set_globals_cm(void __iomem *cm, void __iomem *cm2); +# endif + +/* + * MAX_MODULE_DISABLE_TIME: max duration in microseconds to wait for + * the PRCM to request that a module enter the inactive state in the + * case of OMAP2 & 3. In the case of OMAP4 this is the max duration + * in microseconds for the module to reach the inactive state from + * a functional state. + * XXX FSUSB on OMAP4430 takes ~4ms to idle after reset during + * kernel init. + */ +#define MAX_MODULE_DISABLE_TIME 5000 + +# ifndef __ASSEMBLER__ + +/** + * struct cm_ll_data - fn ptrs to per-SoC CM function implementations + * @split_idlest_reg: ptr to the SoC CM-specific split_idlest_reg impl + * @wait_module_ready: ptr to the SoC CM-specific wait_module_ready impl + * @wait_module_idle: ptr to the SoC CM-specific wait_module_idle impl + * @module_enable: ptr to the SoC CM-specific module_enable impl + * @module_disable: ptr to the SoC CM-specific module_disable impl + */ +struct cm_ll_data { + int (*split_idlest_reg)(void __iomem *idlest_reg, s16 *prcm_inst, + u8 *idlest_reg_id); + int (*wait_module_ready)(u8 part, s16 prcm_mod, u16 idlest_reg, + u8 idlest_shift); + int (*wait_module_idle)(u8 part, s16 prcm_mod, u16 idlest_reg, + u8 idlest_shift); + void (*module_enable)(u8 mode, u8 part, u16 inst, u16 clkctrl_offs); + void (*module_disable)(u8 part, u16 inst, u16 clkctrl_offs); +}; + +extern int cm_split_idlest_reg(void __iomem *idlest_reg, s16 *prcm_inst, + u8 *idlest_reg_id); +int omap_cm_wait_module_ready(u8 part, s16 prcm_mod, u16 idlest_reg, + u8 idlest_shift); +int omap_cm_wait_module_idle(u8 part, s16 prcm_mod, u16 idlest_reg, + u8 idlest_shift); +int omap_cm_module_enable(u8 mode, u8 part, u16 inst, u16 clkctrl_offs); +int omap_cm_module_disable(u8 part, u16 inst, u16 clkctrl_offs); +extern int cm_register(struct cm_ll_data *cld); +extern int cm_unregister(struct cm_ll_data *cld); +int omap_cm_init(void); +int omap2_cm_base_init(void); + +# endif + +#endif |