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 #include <linux/clk/ti.h>
  27
  28 #include "prcm-common.h"
  29
  30 extern struct omap_domain_base cm_base;
  31 extern struct omap_domain_base cm2_base;
  32 extern void omap2_set_globals_cm(void __iomem *cm, void __iomem *cm2);
  33 # endif
  34
  35 /*
  36  * MAX_MODULE_DISABLE_TIME: max duration in microseconds to wait for
  37  * the PRCM to request that a module enter the inactive state in the
  38  * case of OMAP2 & 3.  In the case of OMAP4 this is the max duration
  39  * in microseconds for the module to reach the inactive state from
  40  * a functional state.
  41  * XXX FSUSB on OMAP4430 takes ~4ms to idle after reset during
  42  * kernel init.
  43  */
  44 #define MAX_MODULE_DISABLE_TIME         5000
  45
  46 # ifndef __ASSEMBLER__
  47
  48 /**
  49  * struct cm_ll_data - fn ptrs to per-SoC CM function implementations
  50  * @split_idlest_reg: ptr to the SoC CM-specific split_idlest_reg impl
  51  * @wait_module_ready: ptr to the SoC CM-specific wait_module_ready impl
  52  * @wait_module_idle: ptr to the SoC CM-specific wait_module_idle impl
  53  * @module_enable: ptr to the SoC CM-specific module_enable impl
  54  * @module_disable: ptr to the SoC CM-specific module_disable impl
  55  */
  56 struct cm_ll_data {
  57         int (*split_idlest_reg)(struct clk_omap_reg *idlest_reg, s16 *prcm_inst,
  58                                 u8 *idlest_reg_id);
  59         int (*wait_module_ready)(u8 part, s16 prcm_mod, u16 idlest_reg,
  60                                  u8 idlest_shift);
  61         int (*wait_module_idle)(u8 part, s16 prcm_mod, u16 idlest_reg,
  62                                 u8 idlest_shift);
  63         void (*module_enable)(u8 mode, u8 part, u16 inst, u16 clkctrl_offs);
  64         void (*module_disable)(u8 part, u16 inst, u16 clkctrl_offs);
  65 };
  66
  67 extern int cm_split_idlest_reg(struct clk_omap_reg *idlest_reg, s16 *prcm_inst,
  68                                u8 *idlest_reg_id);
  69 int omap_cm_wait_module_ready(u8 part, s16 prcm_mod, u16 idlest_reg,
  70                               u8 idlest_shift);
  71 int omap_cm_wait_module_idle(u8 part, s16 prcm_mod, u16 idlest_reg,
  72                              u8 idlest_shift);
  73 int omap_cm_module_enable(u8 mode, u8 part, u16 inst, u16 clkctrl_offs);
  74 int omap_cm_module_disable(u8 part, u16 inst, u16 clkctrl_offs);
  75 extern int cm_register(struct cm_ll_data *cld);
  76 extern int cm_unregister(struct cm_ll_data *cld);
  77 int omap_cm_init(void);
  78 int omap2_cm_base_init(void);
  79
  80 # endif
  81
  82 #endif