drivers/clk/meson/clkc.h

   1 /*
   2  * Copyright (c) 2015 Endless Mobile, Inc.
   3  * Author: Carlo Caione <carlo@endlessm.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef __CLKC_H
  19 #define __CLKC_H
  20
  21 #define PMASK(width)                    GENMASK(width - 1, 0)
  22 #define SETPMASK(width, shift)          GENMASK(shift + width - 1, shift)
  23 #define CLRPMASK(width, shift)          (~SETPMASK(width, shift))
  24
  25 #define PARM_GET(width, shift, reg)                                     \
  26         (((reg) & SETPMASK(width, shift)) >> (shift))
  27 #define PARM_SET(width, shift, reg, val)                                \
  28         (((reg) & CLRPMASK(width, shift)) | ((val) << (shift)))
  29
  30 #define MESON_PARM_APPLICABLE(p)                (!!((p)->width))
  31
  32 struct parm {
  33         u16     reg_off;
  34         u8      shift;
  35         u8      width;
  36 };
  37
  38 struct pll_rate_table {
  39         unsigned long   rate;
  40         u16             m;
  41         u16             n;
  42         u16             od;
  43         u16             od2;
  44         u16             frac;
  45 };
  46
  47 #define PLL_RATE(_r, _m, _n, _od)                                       \
  48         {                                                               \
  49                 .rate           = (_r),                                 \
  50                 .m              = (_m),                                 \
  51                 .n              = (_n),                                 \
  52                 .od             = (_od),                                \
  53         }                                                               \
  54
  55 #define PLL_FRAC_RATE(_r, _m, _n, _od, _od2, _frac)                     \
  56         {                                                               \
  57                 .rate           = (_r),                                 \
  58                 .m              = (_m),                                 \
  59                 .n              = (_n),                                 \
  60                 .od             = (_od),                                \
  61                 .od2            = (_od2),                               \
  62                 .frac           = (_frac),                              \
  63         }                                                               \
  64
  65 struct pll_params_table {
  66         unsigned int reg_off;
  67         unsigned int value;
  68 };
  69
  70 #define PLL_PARAM(_reg, _val)                                           \
  71         {                                                               \
  72                 .reg_off        = (_reg),                               \
  73                 .value          = (_val),                               \
  74         }
  75
  76 struct pll_setup_params {
  77         struct pll_params_table *params_table;
  78         unsigned int params_count;
  79         /* Workaround for GP0, do not reset before configuring */
  80         bool no_init_reset;
  81         /* Workaround for GP0, unreset right before checking for lock */
  82         bool clear_reset_for_lock;
  83         /* Workaround for GXL GP0, reset in the lock checking loop */
  84         bool reset_lock_loop;
  85 };
  86
  87 struct meson_clk_pll {
  88         struct clk_hw hw;
  89         void __iomem *base;
  90         struct parm m;
  91         struct parm n;
  92         struct parm frac;
  93         struct parm od;
  94         struct parm od2;
  95         const struct pll_setup_params params;
  96         const struct pll_rate_table *rate_table;
  97         unsigned int rate_count;
  98         spinlock_t *lock;
  99 };
 100
 101 #define to_meson_clk_pll(_hw) container_of(_hw, struct meson_clk_pll, hw)
 102
 103 struct meson_clk_cpu {
 104         struct clk_hw hw;
 105         void __iomem *base;
 106         u16 reg_off;
 107         struct notifier_block clk_nb;
 108         const struct clk_div_table *div_table;
 109 };
 110
 111 int meson_clk_cpu_notifier_cb(struct notifier_block *nb, unsigned long event,
 112                 void *data);
 113
 114 struct meson_clk_mpll {
 115         struct clk_hw hw;
 116         void __iomem *base;
 117         struct parm sdm;
 118         struct parm sdm_en;
 119         struct parm n2;
 120         struct parm en;
 121         spinlock_t *lock;
 122 };
 123
 124 struct meson_clk_audio_divider {
 125         struct clk_hw hw;
 126         void __iomem *base;
 127         struct parm div;
 128         u8 flags;
 129         spinlock_t *lock;
 130 };
 131
 132 #define MESON_GATE(_name, _reg, _bit)                                   \
 133 struct clk_gate _name = {                                               \
 134         .reg = (void __iomem *) _reg,                                   \
 135         .bit_idx = (_bit),                                              \
 136         .lock = &clk_lock,                                              \
 137         .hw.init = &(struct clk_init_data) {                            \
 138                 .name = #_name,                                 \
 139                 .ops = &clk_gate_ops,                                   \
 140                 .parent_names = (const char *[]){ "clk81" },            \
 141                 .num_parents = 1,                                       \
 142                 .flags = (CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED),     \
 143         },                                                              \
 144 };
 145
 146 /* clk_ops */
 147 extern const struct clk_ops meson_clk_pll_ro_ops;
 148 extern const struct clk_ops meson_clk_pll_ops;
 149 extern const struct clk_ops meson_clk_cpu_ops;
 150 extern const struct clk_ops meson_clk_mpll_ro_ops;
 151 extern const struct clk_ops meson_clk_mpll_ops;
 152 extern const struct clk_ops meson_clk_audio_divider_ro_ops;
 153 extern const struct clk_ops meson_clk_audio_divider_ops;
 154
 155 #endif /* __CLKC_H */