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  * @wait_module_idle: ptr to the SoC CM-specific wait_module_idle impl
  49  * @module_enable: ptr to the SoC CM-specific module_enable impl
  50  * @module_disable: ptr to the SoC CM-specific module_disable impl
  51  */
  52 struct cm_ll_data {
  53         int (*split_idlest_reg)(void __iomem *idlest_reg, s16 *prcm_inst,
  54                                 u8 *idlest_reg_id);
  55         int (*wait_module_ready)(u8 part, s16 prcm_mod, u16 idlest_reg,
  56                                  u8 idlest_shift);
  57         int (*wait_module_idle)(u8 part, s16 prcm_mod, u16 idlest_reg,
  58                                 u8 idlest_shift);
  59         void (*module_enable)(u8 mode, u8 part, u16 inst, u16 clkctrl_offs);
  60         void (*module_disable)(u8 part, u16 inst, u16 clkctrl_offs);
  61 };
  62
  63 extern int cm_split_idlest_reg(void __iomem *idlest_reg, s16 *prcm_inst,
  64                                u8 *idlest_reg_id);
  65 int omap_cm_wait_module_ready(u8 part, s16 prcm_mod, u16 idlest_reg,
  66                               u8 idlest_shift);
  67 int omap_cm_wait_module_idle(u8 part, s16 prcm_mod, u16 idlest_reg,
  68                              u8 idlest_shift);
  69 int omap_cm_module_enable(u8 mode, u8 part, u16 inst, u16 clkctrl_offs);
  70 int omap_cm_module_disable(u8 part, u16 inst, u16 clkctrl_offs);
  71 extern int cm_register(struct cm_ll_data *cld);
  72 extern int cm_unregister(struct cm_ll_data *cld);
  73 int omap_cm_init(void);
  74 int omap2_cm_base_init(void);
  75
  76 # endif
  77
  78 #endif