arch/arm/mach-omap2/clockdomains2430_data.c

   1 /*
   2  * OMAP2xxx clockdomains
   3  *
   4  * Copyright (C) 2008-2009 Texas Instruments, Inc.
   5  * Copyright (C) 2008-2010 Nokia Corporation
   6  *
   7  * Paul Walmsley, Jouni Högander
   8  *
   9  * This file contains clockdomains and clockdomain wakeup dependencies
  10  * for OMAP2xxx chips.  Some notes:
  11  *
  12  * A useful validation rule for struct clockdomain: Any clockdomain
  13  * referenced by a wkdep_srcs must have a dep_bit assigned.  So
  14  * wkdep_srcs are really just software-controllable dependencies.
  15  * Non-software-controllable dependencies do exist, but they are not
  16  * encoded below (yet).
  17  *
  18  * 24xx does not support programmable sleep dependencies (SLEEPDEP)
  19  *
  20  * The overly-specific dep_bit names are due to a bit name collision
  21  * with CM_FCLKEN_{DSP,IVA2}.  The DSP/IVA2 PM_WKDEP and CM_SLEEPDEP shift
  22  * value are the same for all powerdomains: 2
  23  *
  24  * XXX should dep_bit be a mask, so we can test to see if it is 0 as a
  25  * sanity check?
  26  * XXX encode hardware fixed wakeup dependencies -- esp. for 3430 CORE
  27  */
  28
  29 /*
  30  * To-Do List
  31  * -> Port the Sleep/Wakeup dependencies for the domains
  32  *    from the Power domain framework
  33  */
  34
  35 #include <linux/kernel.h>
  36 #include <linux/io.h>
  37
  38 #include "soc.h"
  39 #include "clockdomain.h"
  40 #include "prm2xxx_3xxx.h"
  41 #include "cm2xxx_3xxx.h"
  42 #include "cm-regbits-24xx.h"
  43 #include "prm-regbits-24xx.h"
  44
  45 /*
  46  * Clockdomain dependencies for wkdeps
  47  *
  48  * XXX Hardware dependencies (e.g., dependencies that cannot be
  49  * changed in software) are not included here yet, but should be.
  50  */
  51
  52 /* Wakeup dependency source arrays */
  53
  54 /* 2430-specific possible wakeup dependencies */
  55
  56 /* 2430 PM_WKDEP_CORE: DSP, GFX, MPU, WKUP, MDM */
  57 static struct clkdm_dep core_2430_wkdeps[] = {
  58         { .clkdm_name = "dsp_clkdm" },
  59         { .clkdm_name = "gfx_clkdm" },
  60         { .clkdm_name = "mpu_clkdm" },
  61         { .clkdm_name = "wkup_clkdm" },
  62         { .clkdm_name = "mdm_clkdm" },
  63         { NULL },
  64 };
  65
  66 /* 2430 PM_WKDEP_MPU: CORE, DSP, WKUP, MDM */
  67 static struct clkdm_dep mpu_2430_wkdeps[] = {
  68         { .clkdm_name = "core_l3_clkdm" },
  69         { .clkdm_name = "core_l4_clkdm" },
  70         { .clkdm_name = "dsp_clkdm" },
  71         { .clkdm_name = "wkup_clkdm" },
  72         { .clkdm_name = "mdm_clkdm" },
  73         { NULL },
  74 };
  75
  76 /* 2430 PM_WKDEP_MDM: CORE, MPU, WKUP */
  77 static struct clkdm_dep mdm_2430_wkdeps[] = {
  78         { .clkdm_name = "core_l3_clkdm" },
  79         { .clkdm_name = "core_l4_clkdm" },
  80         { .clkdm_name = "mpu_clkdm" },
  81         { .clkdm_name = "wkup_clkdm" },
  82         { NULL },
  83 };
  84
  85 /*
  86  * 2430-only clockdomains
  87  */
  88
  89 static struct clockdomain mpu_2430_clkdm = {
  90         .name           = "mpu_clkdm",
  91         .pwrdm          = { .name = "mpu_pwrdm" },
  92         .flags          = CLKDM_CAN_HWSUP_SWSUP,
  93         .wkdep_srcs     = mpu_2430_wkdeps,
  94         .clktrctrl_mask = OMAP24XX_AUTOSTATE_MPU_MASK,
  95 };
  96
  97 /* Another case of bit name collisions between several registers: EN_MDM */
  98 static struct clockdomain mdm_clkdm = {
  99         .name           = "mdm_clkdm",
 100         .pwrdm          = { .name = "mdm_pwrdm" },
 101         .flags          = CLKDM_CAN_HWSUP_SWSUP,
 102         .dep_bit        = OMAP2430_PM_WKDEP_MPU_EN_MDM_SHIFT,
 103         .wkdep_srcs     = mdm_2430_wkdeps,
 104         .clktrctrl_mask = OMAP2430_AUTOSTATE_MDM_MASK,
 105 };
 106
 107 static struct clockdomain dsp_2430_clkdm = {
 108         .name           = "dsp_clkdm",
 109         .pwrdm          = { .name = "dsp_pwrdm" },
 110         .flags          = CLKDM_CAN_HWSUP_SWSUP,
 111         .dep_bit        = OMAP24XX_PM_WKDEP_MPU_EN_DSP_SHIFT,
 112         .wkdep_srcs     = dsp_24xx_wkdeps,
 113         .clktrctrl_mask = OMAP24XX_AUTOSTATE_DSP_MASK,
 114 };
 115
 116 static struct clockdomain gfx_2430_clkdm = {
 117         .name           = "gfx_clkdm",
 118         .pwrdm          = { .name = "gfx_pwrdm" },
 119         .flags          = CLKDM_CAN_HWSUP_SWSUP,
 120         .wkdep_srcs     = gfx_24xx_wkdeps,
 121         .clktrctrl_mask = OMAP24XX_AUTOSTATE_GFX_MASK,
 122 };
 123
 124 /*
 125  * XXX add usecounting for clkdm dependencies, otherwise the presence
 126  * of a single dep bit for core_l3_24xx_clkdm and core_l4_24xx_clkdm
 127  * could cause trouble
 128  */
 129 static struct clockdomain core_l3_2430_clkdm = {
 130         .name           = "core_l3_clkdm",
 131         .pwrdm          = { .name = "core_pwrdm" },
 132         .flags          = CLKDM_CAN_HWSUP,
 133         .dep_bit        = OMAP24XX_EN_CORE_SHIFT,
 134         .wkdep_srcs     = core_2430_wkdeps,
 135         .clktrctrl_mask = OMAP24XX_AUTOSTATE_L3_MASK,
 136 };
 137
 138 /*
 139  * XXX add usecounting for clkdm dependencies, otherwise the presence
 140  * of a single dep bit for core_l3_24xx_clkdm and core_l4_24xx_clkdm
 141  * could cause trouble
 142  */
 143 static struct clockdomain core_l4_2430_clkdm = {
 144         .name           = "core_l4_clkdm",
 145         .pwrdm          = { .name = "core_pwrdm" },
 146         .flags          = CLKDM_CAN_HWSUP,
 147         .dep_bit        = OMAP24XX_EN_CORE_SHIFT,
 148         .wkdep_srcs     = core_2430_wkdeps,
 149         .clktrctrl_mask = OMAP24XX_AUTOSTATE_L4_MASK,
 150 };
 151
 152 static struct clockdomain dss_2430_clkdm = {
 153         .name           = "dss_clkdm",
 154         .pwrdm          = { .name = "core_pwrdm" },
 155         .flags          = CLKDM_CAN_HWSUP,
 156         .clktrctrl_mask = OMAP24XX_AUTOSTATE_DSS_MASK,
 157 };
 158
 159 static struct clockdomain *clockdomains_omap243x[] __initdata = {
 160         &wkup_common_clkdm,
 161         &mpu_2430_clkdm,
 162         &mdm_clkdm,
 163         &dsp_2430_clkdm,
 164         &gfx_2430_clkdm,
 165         &core_l3_2430_clkdm,
 166         &core_l4_2430_clkdm,
 167         &dss_2430_clkdm,
 168         NULL,
 169 };
 170
 171 void __init omap243x_clockdomains_init(void)
 172 {
 173         if (!cpu_is_omap243x())
 174                 return;
 175
 176         clkdm_register_platform_funcs(&omap2_clkdm_operations);
 177         clkdm_register_clkdms(clockdomains_omap243x);
 178         clkdm_complete_init();
 179 }
 180