LXR uboot/drivers/pinctrl/meson/pinctrl-meson.h

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com>
   4 */
   5
   6#ifndef __PINCTRL_MESON_H__
   7#define __PINCTRL_MESON_H__
   8
   9#include <linux/types.h>
  10
  11struct meson_pmx_group {
  12        const char *name;
  13        const unsigned int *pins;
  14        unsigned int num_pins;
  15        const void *data;
  16};
  17
  18struct meson_pmx_func {
  19        const char *name;
  20        const char * const *groups;
  21        unsigned int num_groups;
  22};
  23
  24struct meson_pinctrl_data {
  25        const char *name;
  26        struct meson_pmx_group *groups;
  27        struct meson_pmx_func *funcs;
  28        struct meson_bank *banks;
  29        unsigned int pin_base;
  30        unsigned int num_pins;
  31        unsigned int num_groups;
  32        unsigned int num_funcs;
  33        unsigned int num_banks;
  34        const struct driver *gpio_driver;
  35        void *pmx_data;
  36};
  37
  38struct meson_pinctrl {
  39        struct meson_pinctrl_data *data;
  40        void __iomem *reg_mux;
  41        void __iomem *reg_gpio;
  42        void __iomem *reg_pull;
  43        void __iomem *reg_pullen;
  44        void __iomem *reg_ds;
  45};
  46
  47/**
  48 * struct meson_reg_desc - a register descriptor
  49 *
  50 * @reg:        register offset in the regmap
  51 * @bit:        bit index in register
  52 *
  53 * The structure describes the information needed to control pull,
  54 * pull-enable, direction, etc. for a single pin
  55 */
  56struct meson_reg_desc {
  57        unsigned int reg;
  58        unsigned int bit;
  59};
  60
  61/**
  62 * enum meson_pinconf_drv - value of drive-strength supported
  63 */
  64enum meson_pinconf_drv {
  65        MESON_PINCONF_DRV_500UA,
  66        MESON_PINCONF_DRV_2500UA,
  67        MESON_PINCONF_DRV_3000UA,
  68        MESON_PINCONF_DRV_4000UA,
  69};
  70
  71/**
  72 * enum meson_reg_type - type of registers encoded in @meson_reg_desc
  73 */
  74enum meson_reg_type {
  75        REG_PULLEN,
  76        REG_PULL,
  77        REG_DIR,
  78        REG_OUT,
  79        REG_IN,
  80        REG_DS,
  81        NUM_REG,
  82};
  83
  84/**
  85 * struct meson bank
  86 *
  87 * @name:       bank name
  88 * @first:      first pin of the bank
  89 * @last:       last pin of the bank
  90 * @regs:       array of register descriptors
  91 *
  92 * A bank represents a set of pins controlled by a contiguous set of
  93 * bits in the domain registers. The structure specifies which bits in
  94 * the regmap control the different functionalities. Each member of
  95 * the @regs array refers to the first pin of the bank.
  96 */
  97struct meson_bank {
  98        const char *name;
  99        unsigned int first;
 100        unsigned int last;
 101        struct meson_reg_desc regs[NUM_REG];
 102};
 103
 104#define PIN(x, b)       (b + x)
 105
 106#define FUNCTION(fn)                                                    \
 107        {                                                               \
 108                .name = #fn,                                            \
 109                .groups = fn ## _groups,                                \
 110                .num_groups = ARRAY_SIZE(fn ## _groups),                \
 111        }
 112
 113#define BANK_DS(n, f, l, per, peb, pr, pb, dr, db, or, ob, ir, ib, \
 114                dsr, dsb)                                                  \
 115        {                                                                  \
 116                .name = n,                                                 \
 117                .first = f,                                                \
 118                .last = l,                                                 \
 119                .regs = {                                                  \
 120                    [REG_PULLEN] = {per, peb},                             \
 121                    [REG_PULL] = {pr, pb},                                 \
 122                    [REG_DIR] = {dr, db},                                  \
 123                    [REG_OUT] = { or, ob},                                 \
 124                    [REG_IN] = {ir, ib},                                   \
 125                    [REG_DS] = {dsr, dsb},                                 \
 126                },                                                         \
 127        }
 128
 129#define BANK(n, f, l, per, peb, pr, pb, dr, db, or, ob, ir, ib) \
 130        BANK_DS(n, f, l, per, peb, pr, pb, dr, db, or, ob, ir, ib, 0, 0)
 131
 132#define MESON_PIN(x, b) PINCTRL_PIN(PIN(x, b), #x)
 133
 134extern const struct pinctrl_ops meson_pinctrl_ops;
 135
 136int meson_pinctrl_get_groups_count(struct udevice *dev);
 137const char *meson_pinctrl_get_group_name(struct udevice *dev,
 138                                         unsigned int selector);
 139int meson_pinctrl_get_pins_count(struct udevice *dev);
 140const char *meson_pinctrl_get_pin_name(struct udevice *dev,
 141                                       unsigned int selector);
 142int meson_pinmux_get_functions_count(struct udevice *dev);
 143const char *meson_pinmux_get_function_name(struct udevice *dev,
 144                                           unsigned int selector);
 145int meson_pinctrl_probe(struct udevice *dev);
 146
 147int meson_gpio_get(struct udevice *dev, unsigned int offset);
 148int meson_gpio_set(struct udevice *dev, unsigned int offset, int value);
 149int meson_gpio_get_direction(struct udevice *dev, unsigned int offset);
 150int meson_gpio_direction_input(struct udevice *dev, unsigned int offset);
 151int meson_gpio_direction_output(struct udevice *dev, unsigned int offset,
 152                                int value);
 153int meson_gpio_probe(struct udevice *dev);
 154
 155int meson_pinconf_set(struct udevice *dev, unsigned int pin,
 156                      unsigned int param, unsigned int arg);
 157int meson_pinconf_group_set(struct udevice *dev,
 158                            unsigned int group_selector,
 159                            unsigned int param, unsigned int arg);
 160
 161#endif /* __PINCTRL_MESON_H__ */
 162