drivers/pinctrl/uniphier/pinctrl-uniphier.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright (C) 2015-2017 Socionext Inc.
   4  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   5  */
   6
   7 #ifndef __PINCTRL_UNIPHIER_H__
   8 #define __PINCTRL_UNIPHIER_H__
   9
  10 #include <linux/bits.h>
  11 #include <linux/build_bug.h>
  12 #include <linux/kernel.h>
  13 #include <linux/types.h>
  14
  15 struct platform_device;
  16
  17 /* input enable control register bit */
  18 #define UNIPHIER_PIN_IECTRL_SHIFT       0
  19 #define UNIPHIER_PIN_IECTRL_BITS        3
  20 #define UNIPHIER_PIN_IECTRL_MASK        ((1UL << (UNIPHIER_PIN_IECTRL_BITS)) \
  21                                          - 1)
  22
  23 /* drive strength control register number */
  24 #define UNIPHIER_PIN_DRVCTRL_SHIFT      ((UNIPHIER_PIN_IECTRL_SHIFT) + \
  25                                         (UNIPHIER_PIN_IECTRL_BITS))
  26 #define UNIPHIER_PIN_DRVCTRL_BITS       9
  27 #define UNIPHIER_PIN_DRVCTRL_MASK       ((1UL << (UNIPHIER_PIN_DRVCTRL_BITS)) \
  28                                          - 1)
  29
  30 /* drive control type */
  31 #define UNIPHIER_PIN_DRV_TYPE_SHIFT     ((UNIPHIER_PIN_DRVCTRL_SHIFT) + \
  32                                          (UNIPHIER_PIN_DRVCTRL_BITS))
  33 #define UNIPHIER_PIN_DRV_TYPE_BITS      3
  34 #define UNIPHIER_PIN_DRV_TYPE_MASK      ((1UL << (UNIPHIER_PIN_DRV_TYPE_BITS)) \
  35                                          - 1)
  36
  37 /* pull-up / pull-down register number */
  38 #define UNIPHIER_PIN_PUPDCTRL_SHIFT     ((UNIPHIER_PIN_DRV_TYPE_SHIFT) + \
  39                                          (UNIPHIER_PIN_DRV_TYPE_BITS))
  40 #define UNIPHIER_PIN_PUPDCTRL_BITS      9
  41 #define UNIPHIER_PIN_PUPDCTRL_MASK      ((1UL << (UNIPHIER_PIN_PUPDCTRL_BITS))\
  42                                          - 1)
  43
  44 /* direction of pull register */
  45 #define UNIPHIER_PIN_PULL_DIR_SHIFT     ((UNIPHIER_PIN_PUPDCTRL_SHIFT) + \
  46                                          (UNIPHIER_PIN_PUPDCTRL_BITS))
  47 #define UNIPHIER_PIN_PULL_DIR_BITS      3
  48 #define UNIPHIER_PIN_PULL_DIR_MASK      ((1UL << (UNIPHIER_PIN_PULL_DIR_BITS))\
  49                                          - 1)
  50
  51 #if UNIPHIER_PIN_PULL_DIR_SHIFT + UNIPHIER_PIN_PULL_DIR_BITS > BITS_PER_LONG
  52 #error "unable to pack pin attributes."
  53 #endif
  54
  55 #define UNIPHIER_PIN_IECTRL_NONE        (UNIPHIER_PIN_IECTRL_MASK)
  56 #define UNIPHIER_PIN_IECTRL_EXIST       0
  57
  58 /* drive control type */
  59 enum uniphier_pin_drv_type {
  60         UNIPHIER_PIN_DRV_1BIT,          /* 2 level control: 4/8 mA */
  61         UNIPHIER_PIN_DRV_2BIT,          /* 4 level control: 8/12/16/20 mA */
  62         UNIPHIER_PIN_DRV_3BIT,          /* 8 level control: 4/5/7/9/11/12/14/16 mA */
  63         UNIPHIER_PIN_DRV_FIXED4,        /* fixed to 4mA */
  64         UNIPHIER_PIN_DRV_FIXED5,        /* fixed to 5mA */
  65         UNIPHIER_PIN_DRV_FIXED8,        /* fixed to 8mA */
  66         UNIPHIER_PIN_DRV_NONE,          /* no support (input only pin) */
  67 };
  68
  69 /* direction of pull register (no pin supports bi-directional pull biasing) */
  70 enum uniphier_pin_pull_dir {
  71         UNIPHIER_PIN_PULL_UP,           /* pull-up or disabled */
  72         UNIPHIER_PIN_PULL_DOWN,         /* pull-down or disabled */
  73         UNIPHIER_PIN_PULL_UP_FIXED,     /* always pull-up */
  74         UNIPHIER_PIN_PULL_DOWN_FIXED,   /* always pull-down */
  75         UNIPHIER_PIN_PULL_NONE,         /* no pull register */
  76 };
  77
  78 #define UNIPHIER_PIN_IECTRL(x) \
  79         (((x) & (UNIPHIER_PIN_IECTRL_MASK)) << (UNIPHIER_PIN_IECTRL_SHIFT))
  80 #define UNIPHIER_PIN_DRVCTRL(x) \
  81         (((x) & (UNIPHIER_PIN_DRVCTRL_MASK)) << (UNIPHIER_PIN_DRVCTRL_SHIFT))
  82 #define UNIPHIER_PIN_DRV_TYPE(x) \
  83         (((x) & (UNIPHIER_PIN_DRV_TYPE_MASK)) << (UNIPHIER_PIN_DRV_TYPE_SHIFT))
  84 #define UNIPHIER_PIN_PUPDCTRL(x) \
  85         (((x) & (UNIPHIER_PIN_PUPDCTRL_MASK)) << (UNIPHIER_PIN_PUPDCTRL_SHIFT))
  86 #define UNIPHIER_PIN_PULL_DIR(x) \
  87         (((x) & (UNIPHIER_PIN_PULL_DIR_MASK)) << (UNIPHIER_PIN_PULL_DIR_SHIFT))
  88
  89 #define UNIPHIER_PIN_ATTR_PACKED(iectrl, drvctrl, drv_type, pupdctrl, pull_dir)\
  90                                 (UNIPHIER_PIN_IECTRL(iectrl) |          \
  91                                  UNIPHIER_PIN_DRVCTRL(drvctrl) |        \
  92                                  UNIPHIER_PIN_DRV_TYPE(drv_type) |      \
  93                                  UNIPHIER_PIN_PUPDCTRL(pupdctrl) |      \
  94                                  UNIPHIER_PIN_PULL_DIR(pull_dir))
  95
  96 static inline unsigned int uniphier_pin_get_iectrl(void *drv_data)
  97 {
  98         return ((unsigned long)drv_data >> UNIPHIER_PIN_IECTRL_SHIFT) &
  99                                                 UNIPHIER_PIN_IECTRL_MASK;
 100 }
 101
 102 static inline unsigned int uniphier_pin_get_drvctrl(void *drv_data)
 103 {
 104         return ((unsigned long)drv_data >> UNIPHIER_PIN_DRVCTRL_SHIFT) &
 105                                                 UNIPHIER_PIN_DRVCTRL_MASK;
 106 }
 107
 108 static inline unsigned int uniphier_pin_get_drv_type(void *drv_data)
 109 {
 110         return ((unsigned long)drv_data >> UNIPHIER_PIN_DRV_TYPE_SHIFT) &
 111                                                 UNIPHIER_PIN_DRV_TYPE_MASK;
 112 }
 113
 114 static inline unsigned int uniphier_pin_get_pupdctrl(void *drv_data)
 115 {
 116         return ((unsigned long)drv_data >> UNIPHIER_PIN_PUPDCTRL_SHIFT) &
 117                                                 UNIPHIER_PIN_PUPDCTRL_MASK;
 118 }
 119
 120 static inline unsigned int uniphier_pin_get_pull_dir(void *drv_data)
 121 {
 122         return ((unsigned long)drv_data >> UNIPHIER_PIN_PULL_DIR_SHIFT) &
 123                                                 UNIPHIER_PIN_PULL_DIR_MASK;
 124 }
 125
 126 struct uniphier_pinctrl_group {
 127         const char *name;
 128         const unsigned *pins;
 129         unsigned num_pins;
 130         const int *muxvals;
 131 };
 132
 133 struct uniphier_pinmux_function {
 134         const char *name;
 135         const char * const *groups;
 136         unsigned num_groups;
 137 };
 138
 139 struct uniphier_pinctrl_socdata {
 140         const struct pinctrl_pin_desc *pins;
 141         unsigned int npins;
 142         const struct uniphier_pinctrl_group *groups;
 143         int groups_count;
 144         const struct uniphier_pinmux_function *functions;
 145         int functions_count;
 146         int (*get_gpio_muxval)(unsigned int pin, unsigned int gpio_offset);
 147         unsigned int caps;
 148 #define UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL     BIT(1)
 149 #define UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE   BIT(0)
 150 };
 151
 152 #define UNIPHIER_PINCTRL_PIN(a, b, c, d, e, f, g)                       \
 153 {                                                                       \
 154         .number = a,                                                    \
 155         .name = b,                                                      \
 156         .drv_data = (void *)UNIPHIER_PIN_ATTR_PACKED(c, d, e, f, g),    \
 157 }
 158
 159 #define __UNIPHIER_PINCTRL_GROUP(grp, mux)                              \
 160         {                                                               \
 161                 .name = #grp,                                           \
 162                 .pins = grp##_pins,                                     \
 163                 .num_pins = ARRAY_SIZE(grp##_pins),                     \
 164                 .muxvals = mux,                                         \
 165         }
 166
 167 #define UNIPHIER_PINCTRL_GROUP(grp)                                     \
 168         __UNIPHIER_PINCTRL_GROUP(grp,                                   \
 169                         grp##_muxvals +                                 \
 170                         BUILD_BUG_ON_ZERO(ARRAY_SIZE(grp##_pins) !=     \
 171                                           ARRAY_SIZE(grp##_muxvals)))
 172
 173 #define UNIPHIER_PINCTRL_GROUP_GPIO(grp)                                \
 174         __UNIPHIER_PINCTRL_GROUP(grp, NULL)
 175
 176 #define UNIPHIER_PINMUX_FUNCTION(func)                                  \
 177         {                                                               \
 178                 .name = #func,                                          \
 179                 .groups = func##_groups,                                \
 180                 .num_groups = ARRAY_SIZE(func##_groups),                \
 181         }
 182
 183 int uniphier_pinctrl_probe(struct platform_device *pdev,
 184                            const struct uniphier_pinctrl_socdata *socdata);
 185
 186 extern const struct dev_pm_ops uniphier_pinctrl_pm_ops;
 187
 188 #endif /* __PINCTRL_UNIPHIER_H__ */