arch/arm/mach-omap2/cm.h

   1 /*
   2  * OMAP2+ Clock Management prototypes
   3  *
   4  * Copyright (C) 2007-2009, 2012 Texas Instruments, Inc.
   5  * Copyright (C) 2007-2009 Nokia Corporation
   6  *
   7  * Written by Paul Walmsley
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13 #ifndef __ARCH_ASM_MACH_OMAP2_CM_H
  14 #define __ARCH_ASM_MACH_OMAP2_CM_H
  15
  16 /*
  17  * MAX_MODULE_READY_TIME: max duration in microseconds to wait for the
  18  * PRCM to request that a module exit the inactive state in the case of
  19  * OMAP2 & 3.
  20  * In the case of OMAP4 this is the max duration in microseconds for the
  21  * module to reach the functionnal state from an inactive state.
  22  */
  23 #define MAX_MODULE_READY_TIME           2000
  24
  25 # ifndef __ASSEMBLER__
  26 extern void __iomem *cm_base;
  27 extern void __iomem *cm2_base;
  28 extern void omap2_set_globals_cm(void __iomem *cm, void __iomem *cm2);
  29 # endif
  30
  31 /*
  32  * MAX_MODULE_DISABLE_TIME: max duration in microseconds to wait for
  33  * the PRCM to request that a module enter the inactive state in the
  34  * case of OMAP2 & 3.  In the case of OMAP4 this is the max duration
  35  * in microseconds for the module to reach the inactive state from
  36  * a functional state.
  37  * XXX FSUSB on OMAP4430 takes ~4ms to idle after reset during
  38  * kernel init.
  39  */
  40 #define MAX_MODULE_DISABLE_TIME         5000
  41
  42 # ifndef __ASSEMBLER__
  43
  44 /**
  45  * struct cm_ll_data - fn ptrs to per-SoC CM function implementations
  46  * @split_idlest_reg: ptr to the SoC CM-specific split_idlest_reg impl
  47  * @wait_module_ready: ptr to the SoC CM-specific wait_module_ready impl
  48  */
  49 struct cm_ll_data {
  50         int (*split_idlest_reg)(void __iomem *idlest_reg, s16 *prcm_inst,
  51                                 u8 *idlest_reg_id);
  52         int (*wait_module_ready)(s16 prcm_mod, u8 idlest_id, u8 idlest_shift);
  53 };
  54
  55 extern int cm_split_idlest_reg(void __iomem *idlest_reg, s16 *prcm_inst,
  56                                u8 *idlest_reg_id);
  57 extern int cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift);
  58
  59 extern int cm_register(struct cm_ll_data *cld);
  60 extern int cm_unregister(struct cm_ll_data *cld);
  61
  62 # endif
  63
  64 #endif