cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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machine.h (4445B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __LINUX_GPIO_MACHINE_H
      3#define __LINUX_GPIO_MACHINE_H
      4
      5#include <linux/types.h>
      6#include <linux/list.h>
      7
      8enum gpio_lookup_flags {
      9	GPIO_ACTIVE_HIGH		= (0 << 0),
     10	GPIO_ACTIVE_LOW			= (1 << 0),
     11	GPIO_OPEN_DRAIN			= (1 << 1),
     12	GPIO_OPEN_SOURCE		= (1 << 2),
     13	GPIO_PERSISTENT			= (0 << 3),
     14	GPIO_TRANSITORY			= (1 << 3),
     15	GPIO_PULL_UP			= (1 << 4),
     16	GPIO_PULL_DOWN			= (1 << 5),
     17
     18	GPIO_LOOKUP_FLAGS_DEFAULT	= GPIO_ACTIVE_HIGH | GPIO_PERSISTENT,
     19};
     20
     21/**
     22 * struct gpiod_lookup - lookup table
     23 * @key: either the name of the chip the GPIO belongs to, or the GPIO line name
     24 *       Note that GPIO line names are not guaranteed to be globally unique,
     25 *       so this will use the first match found!
     26 * @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO, or
     27 *              U16_MAX to indicate that @key is a GPIO line name
     28 * @con_id: name of the GPIO from the device's point of view
     29 * @idx: index of the GPIO in case several GPIOs share the same name
     30 * @flags: bitmask of gpio_lookup_flags GPIO_* values
     31 *
     32 * gpiod_lookup is a lookup table for associating GPIOs to specific devices and
     33 * functions using platform data.
     34 */
     35struct gpiod_lookup {
     36	const char *key;
     37	u16 chip_hwnum;
     38	const char *con_id;
     39	unsigned int idx;
     40	unsigned long flags;
     41};
     42
     43struct gpiod_lookup_table {
     44	struct list_head list;
     45	const char *dev_id;
     46	struct gpiod_lookup table[];
     47};
     48
     49/**
     50 * struct gpiod_hog - GPIO line hog table
     51 * @chip_label: name of the chip the GPIO belongs to
     52 * @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO
     53 * @line_name: consumer name for the hogged line
     54 * @lflags: bitmask of gpio_lookup_flags GPIO_* values
     55 * @dflags: GPIO flags used to specify the direction and value
     56 */
     57struct gpiod_hog {
     58	struct list_head list;
     59	const char *chip_label;
     60	u16 chip_hwnum;
     61	const char *line_name;
     62	unsigned long lflags;
     63	int dflags;
     64};
     65
     66/*
     67 * Helper for lookup tables with just one single lookup for a device.
     68 */
     69#define GPIO_LOOKUP_SINGLE(_name, _dev_id, _key, _chip_hwnum, _con_id, _flags) \
     70static struct gpiod_lookup_table _name = {				\
     71	.dev_id = _dev_id,						\
     72	.table = {							\
     73		GPIO_LOOKUP(_key, _chip_hwnum, _con_id, _flags),	\
     74		{},							\
     75	},								\
     76}
     77
     78/*
     79 * Simple definition of a single GPIO under a con_id
     80 */
     81#define GPIO_LOOKUP(_key, _chip_hwnum, _con_id, _flags) \
     82	GPIO_LOOKUP_IDX(_key, _chip_hwnum, _con_id, 0, _flags)
     83
     84/*
     85 * Use this macro if you need to have several GPIOs under the same con_id.
     86 * Each GPIO needs to use a different index and can be accessed using
     87 * gpiod_get_index()
     88 */
     89#define GPIO_LOOKUP_IDX(_key, _chip_hwnum, _con_id, _idx, _flags)         \
     90(struct gpiod_lookup) {                                                   \
     91	.key = _key,                                                      \
     92	.chip_hwnum = _chip_hwnum,                                        \
     93	.con_id = _con_id,                                                \
     94	.idx = _idx,                                                      \
     95	.flags = _flags,                                                  \
     96}
     97
     98/*
     99 * Simple definition of a single GPIO hog in an array.
    100 */
    101#define GPIO_HOG(_chip_label, _chip_hwnum, _line_name, _lflags, _dflags)  \
    102(struct gpiod_hog) {                                                      \
    103	.chip_label = _chip_label,                                        \
    104	.chip_hwnum = _chip_hwnum,                                        \
    105	.line_name = _line_name,                                          \
    106	.lflags = _lflags,                                                \
    107	.dflags = _dflags,                                                \
    108}
    109
    110#ifdef CONFIG_GPIOLIB
    111void gpiod_add_lookup_table(struct gpiod_lookup_table *table);
    112void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n);
    113void gpiod_remove_lookup_table(struct gpiod_lookup_table *table);
    114void gpiod_add_hogs(struct gpiod_hog *hogs);
    115void gpiod_remove_hogs(struct gpiod_hog *hogs);
    116#else /* ! CONFIG_GPIOLIB */
    117static inline
    118void gpiod_add_lookup_table(struct gpiod_lookup_table *table) {}
    119static inline
    120void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n) {}
    121static inline
    122void gpiod_remove_lookup_table(struct gpiod_lookup_table *table) {}
    123static inline void gpiod_add_hogs(struct gpiod_hog *hogs) {}
    124static inline void gpiod_remove_hogs(struct gpiod_hog *hogs) {}
    125#endif /* CONFIG_GPIOLIB */
    126
    127#endif /* __LINUX_GPIO_MACHINE_H */