kernel/arch/arm/mach-omap2/clock.h

   1 /*
   2  *  linux/arch/arm/mach-omap2/clock.h
   3  *
   4  *  Copyright (C) 2005-2009 Texas Instruments, Inc.
   5  *  Copyright (C) 2004-2011 Nokia Corporation
   6  *
   7  *  Contacts:
   8  *  Richard Woodruff <r-woodruff2@ti.com>
   9  *  Paul Walmsley
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #ifndef __ARCH_ARM_MACH_OMAP2_CLOCK_H
  17 #define __ARCH_ARM_MACH_OMAP2_CLOCK_H
  18
  19 #include <linux/kernel.h>
  20 #include <linux/list.h>
  21
  22 #include <linux/clkdev.h>
  23 #include <linux/clk-provider.h>
  24 #include <linux/clk/ti.h>
  25
  26 struct omap_clk {
  27         u16                             cpu;
  28         struct clk_lookup               lk;
  29 };
  30
  31 #define CLK(dev, con, ck)               \
  32         {                               \
  33                 .lk = {                 \
  34                         .dev_id = dev,  \
  35                         .con_id = con,  \
  36                         .clk = ck,      \
  37                 },                      \
  38         }
  39
  40 struct clockdomain;
  41
  42 #define DEFINE_STRUCT_CLK(_name, _parent_array_name, _clkops_name)      \
  43         static struct clk_core _name##_core = {                 \
  44                 .name = #_name,                                 \
  45                 .hw = &_name##_hw.hw,                           \
  46                 .parent_names = _parent_array_name,             \
  47                 .num_parents = ARRAY_SIZE(_parent_array_name),  \
  48                 .ops = &_clkops_name,                           \
  49         };                                                      \
  50         static struct clk _name = {                             \
  51                 .core = &_name##_core,                          \
  52         };
  53
  54 #define DEFINE_STRUCT_CLK_FLAGS(_name, _parent_array_name,      \
  55                                 _clkops_name, _flags)           \
  56         static struct clk_core _name##_core = {                 \
  57                 .name = #_name,                                 \
  58                 .hw = &_name##_hw.hw,                           \
  59                 .parent_names = _parent_array_name,             \
  60                 .num_parents = ARRAY_SIZE(_parent_array_name),  \
  61                 .ops = &_clkops_name,                           \
  62                 .flags = _flags,                                \
  63         };                                                      \
  64         static struct clk _name = {                             \
  65                 .core = &_name##_core,                          \
  66         };
  67
  68 #define DEFINE_STRUCT_CLK_HW_OMAP(_name, _clkdm_name)           \
  69         static struct clk_hw_omap _name##_hw = {                \
  70                 .hw = {                                         \
  71                         .clk = &_name,                          \
  72                 },                                              \
  73                 .clkdm_name = _clkdm_name,                      \
  74         };
  75
  76 #define DEFINE_CLK_OMAP_MUX(_name, _clkdm_name, _clksel,        \
  77                             _clksel_reg, _clksel_mask,          \
  78                             _parent_names, _ops)                \
  79         static struct clk _name;                                \
  80         static struct clk_hw_omap _name##_hw = {                \
  81                 .hw = {                                         \
  82                         .clk = &_name,                          \
  83                 },                                              \
  84                 .clksel         = _clksel,                      \
  85                 .clksel_reg     = _clksel_reg,                  \
  86                 .clksel_mask    = _clksel_mask,                 \
  87                 .clkdm_name     = _clkdm_name,                  \
  88         };                                                      \
  89         DEFINE_STRUCT_CLK(_name, _parent_names, _ops);
  90
  91 #define DEFINE_CLK_OMAP_MUX_GATE(_name, _clkdm_name, _clksel,   \
  92                                  _clksel_reg, _clksel_mask,     \
  93                                  _enable_reg, _enable_bit,      \
  94                                  _hwops, _parent_names, _ops)   \
  95         static struct clk _name;                                \
  96         static struct clk_hw_omap _name##_hw = {                \
  97                 .hw = {                                         \
  98                         .clk = &_name,                          \
  99                 },                                              \
 100                 .ops            = _hwops,                       \
 101                 .enable_reg     = _enable_reg,                  \
 102                 .enable_bit     = _enable_bit,                  \
 103                 .clksel         = _clksel,                      \
 104                 .clksel_reg     = _clksel_reg,                  \
 105                 .clksel_mask    = _clksel_mask,                 \
 106                 .clkdm_name     = _clkdm_name,                  \
 107         };                                                      \
 108         DEFINE_STRUCT_CLK(_name, _parent_names, _ops);
 109
 110 /* struct clksel_rate.flags possibilities */
 111 #define RATE_IN_242X            (1 << 0)
 112 #define RATE_IN_243X            (1 << 1)
 113 #define RATE_IN_3430ES1         (1 << 2)        /* 3430ES1 rates only */
 114 #define RATE_IN_3430ES2PLUS     (1 << 3)        /* 3430 ES >= 2 rates only */
 115 #define RATE_IN_36XX            (1 << 4)
 116 #define RATE_IN_4430            (1 << 5)
 117 #define RATE_IN_TI816X          (1 << 6)
 118 #define RATE_IN_4460            (1 << 7)
 119 #define RATE_IN_AM33XX          (1 << 8)
 120 #define RATE_IN_TI814X          (1 << 9)
 121
 122 #define RATE_IN_24XX            (RATE_IN_242X | RATE_IN_243X)
 123 #define RATE_IN_34XX            (RATE_IN_3430ES1 | RATE_IN_3430ES2PLUS)
 124 #define RATE_IN_3XXX            (RATE_IN_34XX | RATE_IN_36XX)
 125 #define RATE_IN_44XX            (RATE_IN_4430 | RATE_IN_4460)
 126
 127 /* RATE_IN_3430ES2PLUS_36XX includes 34xx/35xx with ES >=2, and all 36xx/37xx */
 128 #define RATE_IN_3430ES2PLUS_36XX        (RATE_IN_3430ES2PLUS | RATE_IN_36XX)
 129
 130
 131 /**
 132  * struct clksel_rate - register bitfield values corresponding to clk divisors
 133  * @val: register bitfield value (shifted to bit 0)
 134  * @div: clock divisor corresponding to @val
 135  * @flags: (see "struct clksel_rate.flags possibilities" above)
 136  *
 137  * @val should match the value of a read from struct clk.clksel_reg
 138  * AND'ed with struct clk.clksel_mask, shifted right to bit 0.
 139  *
 140  * @div is the divisor that should be applied to the parent clock's rate
 141  * to produce the current clock's rate.
 142  */
 143 struct clksel_rate {
 144         u32                     val;
 145         u8                      div;
 146         u16                     flags;
 147 };
 148
 149 /**
 150  * struct clksel - available parent clocks, and a pointer to their divisors
 151  * @parent: struct clk * to a possible parent clock
 152  * @rates: available divisors for this parent clock
 153  *
 154  * A struct clksel is always associated with one or more struct clks
 155  * and one or more struct clksel_rates.
 156  */
 157 struct clksel {
 158         struct clk               *parent;
 159         const struct clksel_rate *rates;
 160 };
 161
 162 /* CM_CLKSEL2_PLL.CORE_CLK_SRC bits (2XXX) */
 163 #define CORE_CLK_SRC_32K                0x0
 164 #define CORE_CLK_SRC_DPLL               0x1
 165 #define CORE_CLK_SRC_DPLL_X2            0x2
 166
 167 /* OMAP2xxx CM_CLKEN_PLL.EN_DPLL bits - for omap2_get_dpll_rate() */
 168 #define OMAP2XXX_EN_DPLL_LPBYPASS               0x1
 169 #define OMAP2XXX_EN_DPLL_FRBYPASS               0x2
 170 #define OMAP2XXX_EN_DPLL_LOCKED                 0x3
 171
 172 /* OMAP3xxx CM_CLKEN_PLL*.EN_*_DPLL bits - for omap2_get_dpll_rate() */
 173 #define OMAP3XXX_EN_DPLL_LPBYPASS               0x5
 174 #define OMAP3XXX_EN_DPLL_FRBYPASS               0x6
 175 #define OMAP3XXX_EN_DPLL_LOCKED                 0x7
 176
 177 /* OMAP4xxx CM_CLKMODE_DPLL*.EN_*_DPLL bits - for omap2_get_dpll_rate() */
 178 #define OMAP4XXX_EN_DPLL_MNBYPASS               0x4
 179 #define OMAP4XXX_EN_DPLL_LPBYPASS               0x5
 180 #define OMAP4XXX_EN_DPLL_FRBYPASS               0x6
 181 #define OMAP4XXX_EN_DPLL_LOCKED                 0x7
 182
 183 u32 omap3_dpll_autoidle_read(struct clk_hw_omap *clk);
 184 void omap3_dpll_allow_idle(struct clk_hw_omap *clk);
 185 void omap3_dpll_deny_idle(struct clk_hw_omap *clk);
 186 void omap4_dpllmx_allow_gatectrl(struct clk_hw_omap *clk);
 187 void omap4_dpllmx_deny_gatectrl(struct clk_hw_omap *clk);
 188
 189 void __init omap2_clk_disable_clkdm_control(void);
 190
 191 /* clkt_clksel.c public functions */
 192 u32 omap2_clksel_round_rate_div(struct clk_hw_omap *clk,
 193                                 unsigned long target_rate,
 194                                 u32 *new_div);
 195 u8 omap2_clksel_find_parent_index(struct clk_hw *hw);
 196 unsigned long omap2_clksel_recalc(struct clk_hw *hw, unsigned long parent_rate);
 197 long omap2_clksel_round_rate(struct clk_hw *hw, unsigned long target_rate,
 198                                 unsigned long *parent_rate);
 199 int omap2_clksel_set_rate(struct clk_hw *hw, unsigned long rate,
 200                                 unsigned long parent_rate);
 201 int omap2_clksel_set_parent(struct clk_hw *hw, u8 field_val);
 202
 203 /* clkt_iclk.c public functions */
 204 extern void omap2_clkt_iclk_allow_idle(struct clk_hw_omap *clk);
 205 extern void omap2_clkt_iclk_deny_idle(struct clk_hw_omap *clk);
 206
 207 unsigned long omap2_get_dpll_rate(struct clk_hw_omap *clk);
 208
 209 void omap2_clk_dflt_find_companion(struct clk_hw_omap *clk,
 210                                    void __iomem **other_reg,
 211                                    u8 *other_bit);
 212 void omap2_clk_dflt_find_idlest(struct clk_hw_omap *clk,
 213                                 void __iomem **idlest_reg,
 214                                 u8 *idlest_bit, u8 *idlest_val);
 215 int omap2_clk_enable_autoidle_all(void);
 216 int omap2_clk_allow_idle(struct clk *clk);
 217 int omap2_clk_deny_idle(struct clk *clk);
 218 int omap2_clk_switch_mpurate_at_boot(const char *mpurate_ck_name);
 219 void omap2_clk_print_new_rates(const char *hfclkin_ck_name,
 220                                const char *core_ck_name,
 221                                const char *mpu_ck_name);
 222
 223 u32 omap2_clk_readl(struct clk_hw_omap *clk, void __iomem *reg);
 224 void omap2_clk_writel(u32 val, struct clk_hw_omap *clk, void __iomem *reg);
 225
 226 extern u16 cpu_mask;
 227
 228 /*
 229  * Clock features setup. Used instead of CPU type checks.
 230  */
 231 struct ti_clk_features {
 232         u32 flags;
 233         long fint_min;
 234         long fint_max;
 235         long fint_band1_max;
 236         long fint_band2_min;
 237         u8 dpll_bypass_vals;
 238         u8 cm_idlest_val;
 239 };
 240
 241 #define TI_CLK_DPLL_HAS_FREQSEL         (1 << 0)
 242 #define TI_CLK_DPLL4_DENY_REPROGRAM     (1 << 1)
 243
 244 extern struct ti_clk_features ti_clk_features;
 245
 246 extern const struct clkops clkops_omap2_dflt_wait;
 247 extern const struct clkops clkops_omap2_dflt;
 248
 249 extern struct clk_functions omap2_clk_functions;
 250
 251 extern const struct clksel_rate gpt_32k_rates[];
 252 extern const struct clksel_rate gpt_sys_rates[];
 253 extern const struct clksel_rate gfx_l3_rates[];
 254 extern const struct clksel_rate dsp_ick_rates[];
 255
 256 extern const struct clk_hw_omap_ops clkhwops_iclk_wait;
 257 extern const struct clk_hw_omap_ops clkhwops_wait;
 258 extern const struct clk_hw_omap_ops clkhwops_omap3430es2_ssi_wait;
 259 extern const struct clk_hw_omap_ops clkhwops_omap3430es2_dss_usbhost_wait;
 260 extern const struct clk_hw_omap_ops clkhwops_omap3430es2_hsotgusb_wait;
 261 extern const struct clk_hw_omap_ops clkhwops_am35xx_ipss_module_wait;
 262 extern const struct clk_hw_omap_ops clkhwops_apll54;
 263 extern const struct clk_hw_omap_ops clkhwops_apll96;
 264
 265 /* clksel_rate blocks shared between OMAP44xx and AM33xx */
 266 extern const struct clksel_rate div_1_0_rates[];
 267 extern const struct clksel_rate div3_1to4_rates[];
 268 extern const struct clksel_rate div_1_1_rates[];
 269 extern const struct clksel_rate div_1_2_rates[];
 270 extern const struct clksel_rate div_1_3_rates[];
 271 extern const struct clksel_rate div_1_4_rates[];
 272 extern const struct clksel_rate div31_1to31_rates[];
 273
 274 extern int omap2_clkops_enable_clkdm(struct clk_hw *hw);
 275 extern void omap2_clkops_disable_clkdm(struct clk_hw *hw);
 276
 277 struct regmap;
 278
 279 int __init omap2_clk_provider_init(struct device_node *np, int index,
 280                                    struct regmap *syscon, void __iomem *mem);
 281 void __init omap2_clk_legacy_provider_init(int index, void __iomem *mem);
 282
 283 void __init ti_clk_init_features(void);
 284 #endif