kernel/drivers/pinctrl/uniphier/pinctrl-uniphier.h

   1 /*
   2  * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #ifndef __PINCTRL_UNIPHIER_H__
  16 #define __PINCTRL_UNIPHIER_H__
  17
  18 #include <linux/bug.h>
  19 #include <linux/kernel.h>
  20 #include <linux/types.h>
  21
  22 #define UNIPHIER_PINCTRL_PINMUX_BASE    0x0
  23 #define UNIPHIER_PINCTRL_LOAD_PINMUX    0x700
  24 #define UNIPHIER_PINCTRL_DRVCTRL_BASE   0x800
  25 #define UNIPHIER_PINCTRL_DRV2CTRL_BASE  0x900
  26 #define UNIPHIER_PINCTRL_PUPDCTRL_BASE  0xa00
  27 #define UNIPHIER_PINCTRL_IECTRL         0xd00
  28
  29 /* input enable control register bit */
  30 #define UNIPHIER_PIN_IECTRL_SHIFT       0
  31 #define UNIPHIER_PIN_IECTRL_BITS        8
  32 #define UNIPHIER_PIN_IECTRL_MASK        ((1UL << (UNIPHIER_PIN_IECTRL_BITS)) \
  33                                          - 1)
  34
  35 /* drive strength control register number */
  36 #define UNIPHIER_PIN_DRVCTRL_SHIFT      ((UNIPHIER_PIN_IECTRL_SHIFT) + \
  37                                         (UNIPHIER_PIN_IECTRL_BITS))
  38 #define UNIPHIER_PIN_DRVCTRL_BITS       9
  39 #define UNIPHIER_PIN_DRVCTRL_MASK       ((1UL << (UNIPHIER_PIN_DRVCTRL_BITS)) \
  40                                          - 1)
  41
  42 /* supported drive strength (mA) */
  43 #define UNIPHIER_PIN_DRV_STR_SHIFT      ((UNIPHIER_PIN_DRVCTRL_SHIFT) + \
  44                                          (UNIPHIER_PIN_DRVCTRL_BITS))
  45 #define UNIPHIER_PIN_DRV_STR_BITS       3
  46 #define UNIPHIER_PIN_DRV_STR_MASK       ((1UL << (UNIPHIER_PIN_DRV_STR_BITS)) \
  47                                          - 1)
  48
  49 /* pull-up / pull-down register number */
  50 #define UNIPHIER_PIN_PUPDCTRL_SHIFT     ((UNIPHIER_PIN_DRV_STR_SHIFT) + \
  51                                          (UNIPHIER_PIN_DRV_STR_BITS))
  52 #define UNIPHIER_PIN_PUPDCTRL_BITS      9
  53 #define UNIPHIER_PIN_PUPDCTRL_MASK      ((1UL << (UNIPHIER_PIN_PUPDCTRL_BITS))\
  54                                          - 1)
  55
  56 /* direction of pull register */
  57 #define UNIPHIER_PIN_PULL_DIR_SHIFT     ((UNIPHIER_PIN_PUPDCTRL_SHIFT) + \
  58                                          (UNIPHIER_PIN_PUPDCTRL_BITS))
  59 #define UNIPHIER_PIN_PULL_DIR_BITS      3
  60 #define UNIPHIER_PIN_PULL_DIR_MASK      ((1UL << (UNIPHIER_PIN_PULL_DIR_BITS))\
  61                                          - 1)
  62
  63 #if UNIPHIER_PIN_PULL_DIR_SHIFT + UNIPHIER_PIN_PULL_DIR_BITS > BITS_PER_LONG
  64 #error "unable to pack pin attributes."
  65 #endif
  66
  67 #define UNIPHIER_PIN_IECTRL_NONE        (UNIPHIER_PIN_IECTRL_MASK)
  68
  69 /* selectable drive strength */
  70 enum uniphier_pin_drv_str {
  71         UNIPHIER_PIN_DRV_4_8,           /* 2 level control: 4/8 mA */
  72         UNIPHIER_PIN_DRV_8_12_16_20,    /* 4 level control: 8/12/16/20 mA */
  73         UNIPHIER_PIN_DRV_FIXED_4,       /* fixed to 4mA */
  74         UNIPHIER_PIN_DRV_FIXED_5,       /* fixed to 5mA */
  75         UNIPHIER_PIN_DRV_FIXED_8,       /* fixed to 8mA */
  76         UNIPHIER_PIN_DRV_NONE,          /* no support (input only pin) */
  77 };
  78
  79 /* direction of pull register (no pin supports bi-directional pull biasing) */
  80 enum uniphier_pin_pull_dir {
  81         UNIPHIER_PIN_PULL_UP,           /* pull-up or disabled */
  82         UNIPHIER_PIN_PULL_DOWN,         /* pull-down or disabled */
  83         UNIPHIER_PIN_PULL_UP_FIXED,     /* always pull-up */
  84         UNIPHIER_PIN_PULL_DOWN_FIXED,   /* always pull-down */
  85         UNIPHIER_PIN_PULL_NONE,         /* no pull register */
  86 };
  87
  88 #define UNIPHIER_PIN_IECTRL(x) \
  89         (((x) & (UNIPHIER_PIN_IECTRL_MASK)) << (UNIPHIER_PIN_IECTRL_SHIFT))
  90 #define UNIPHIER_PIN_DRVCTRL(x) \
  91         (((x) & (UNIPHIER_PIN_DRVCTRL_MASK)) << (UNIPHIER_PIN_DRVCTRL_SHIFT))
  92 #define UNIPHIER_PIN_DRV_STR(x) \
  93         (((x) & (UNIPHIER_PIN_DRV_STR_MASK)) << (UNIPHIER_PIN_DRV_STR_SHIFT))
  94 #define UNIPHIER_PIN_PUPDCTRL(x) \
  95         (((x) & (UNIPHIER_PIN_PUPDCTRL_MASK)) << (UNIPHIER_PIN_PUPDCTRL_SHIFT))
  96 #define UNIPHIER_PIN_PULL_DIR(x) \
  97         (((x) & (UNIPHIER_PIN_PULL_DIR_MASK)) << (UNIPHIER_PIN_PULL_DIR_SHIFT))
  98
  99 #define UNIPHIER_PIN_ATTR_PACKED(iectrl, drvctrl, drv_str, pupdctrl, pull_dir)\
 100                                 (UNIPHIER_PIN_IECTRL(iectrl) |          \
 101                                  UNIPHIER_PIN_DRVCTRL(drvctrl) |        \
 102                                  UNIPHIER_PIN_DRV_STR(drv_str) |        \
 103                                  UNIPHIER_PIN_PUPDCTRL(pupdctrl) |      \
 104                                  UNIPHIER_PIN_PULL_DIR(pull_dir))
 105
 106 static inline unsigned int uniphier_pin_get_iectrl(void *drv_data)
 107 {
 108         return ((unsigned long)drv_data >> UNIPHIER_PIN_IECTRL_SHIFT) &
 109                                                 UNIPHIER_PIN_IECTRL_MASK;
 110 }
 111
 112 static inline unsigned int uniphier_pin_get_drvctrl(void *drv_data)
 113 {
 114         return ((unsigned long)drv_data >> UNIPHIER_PIN_DRVCTRL_SHIFT) &
 115                                                 UNIPHIER_PIN_DRVCTRL_MASK;
 116 }
 117
 118 static inline unsigned int uniphier_pin_get_drv_str(void *drv_data)
 119 {
 120         return ((unsigned long)drv_data >> UNIPHIER_PIN_DRV_STR_SHIFT) &
 121                                                 UNIPHIER_PIN_DRV_STR_MASK;
 122 }
 123
 124 static inline unsigned int uniphier_pin_get_pupdctrl(void *drv_data)
 125 {
 126         return ((unsigned long)drv_data >> UNIPHIER_PIN_PUPDCTRL_SHIFT) &
 127                                                 UNIPHIER_PIN_PUPDCTRL_MASK;
 128 }
 129
 130 static inline unsigned int uniphier_pin_get_pull_dir(void *drv_data)
 131 {
 132         return ((unsigned long)drv_data >> UNIPHIER_PIN_PULL_DIR_SHIFT) &
 133                                                 UNIPHIER_PIN_PULL_DIR_MASK;
 134 }
 135
 136 enum uniphier_pinmux_gpio_range_type {
 137         UNIPHIER_PINMUX_GPIO_RANGE_PORT,
 138         UNIPHIER_PINMUX_GPIO_RANGE_IRQ,
 139         UNIPHIER_PINMUX_GPIO_RANGE_NONE,
 140 };
 141
 142 struct uniphier_pinctrl_group {
 143         const char *name;
 144         const unsigned *pins;
 145         unsigned num_pins;
 146         const unsigned *muxvals;
 147         enum uniphier_pinmux_gpio_range_type range_type;
 148 };
 149
 150 struct uniphier_pinmux_function {
 151         const char *name;
 152         const char * const *groups;
 153         unsigned num_groups;
 154 };
 155
 156 struct uniphier_pinctrl_socdata {
 157         const struct uniphier_pinctrl_group *groups;
 158         int groups_count;
 159         const struct uniphier_pinmux_function *functions;
 160         int functions_count;
 161         unsigned mux_bits;
 162         unsigned reg_stride;
 163         bool load_pinctrl;
 164 };
 165
 166 #define UNIPHIER_PINCTRL_PIN(a, b, c, d, e, f, g)                       \
 167 {                                                                       \
 168         .number = a,                                                    \
 169         .name = b,                                                      \
 170         .drv_data = (void *)UNIPHIER_PIN_ATTR_PACKED(c, d, e, f, g),    \
 171 }
 172
 173 #define __UNIPHIER_PINCTRL_GROUP(grp, type)                             \
 174         {                                                               \
 175                 .name = #grp,                                           \
 176                 .pins = grp##_pins,                                     \
 177                 .num_pins = ARRAY_SIZE(grp##_pins),                     \
 178                 .muxvals = grp##_muxvals +                              \
 179                         BUILD_BUG_ON_ZERO(ARRAY_SIZE(grp##_pins) !=     \
 180                                           ARRAY_SIZE(grp##_muxvals)),   \
 181                 .range_type = type,                                     \
 182         }
 183
 184 #define UNIPHIER_PINCTRL_GROUP(grp)                                     \
 185         __UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_NONE)
 186
 187 #define UNIPHIER_PINCTRL_GROUP_GPIO_RANGE_PORT(grp)                     \
 188         __UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_PORT)
 189
 190 #define UNIPHIER_PINCTRL_GROUP_GPIO_RANGE_IRQ(grp)                      \
 191         __UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_IRQ)
 192
 193 #define UNIPHIER_PINCTRL_GROUP_SINGLE(grp, array, ofst)                 \
 194         {                                                               \
 195                 .name = #grp,                                           \
 196                 .pins = array##_pins + ofst,                            \
 197                 .num_pins = 1,                                          \
 198                 .muxvals = array##_muxvals + ofst,                      \
 199         }
 200
 201 #define UNIPHIER_PINMUX_FUNCTION(func)                                  \
 202         {                                                               \
 203                 .name = #func,                                          \
 204                 .groups = func##_groups,                                \
 205                 .num_groups = ARRAY_SIZE(func##_groups),                \
 206         }
 207
 208 struct platform_device;
 209 struct pinctrl_desc;
 210
 211 int uniphier_pinctrl_probe(struct platform_device *pdev,
 212                            struct pinctrl_desc *desc,
 213                            struct uniphier_pinctrl_socdata *socdata);
 214
 215 int uniphier_pinctrl_remove(struct platform_device *pdev);
 216
 217 #endif /* __PINCTRL_UNIPHIER_H__ */