libplatsupport/src/chardev.h

/*
 * Copyright 2017, Data61
 * Commonwealth Scientific and Industrial Research Organisation (CSIRO)
 * ABN 41 687 119 230.
 *
 * This software may be distributed and modified according to the terms of
 * the BSD 2-Clause license. Note that NO WARRANTY is provided.
 * See "LICENSE_BSD2.txt" for details.
 *
 * @TAG(DATA61_BSD)
 */

#pragma once

#include <platsupport/chardev.h>
#include <utils/arith.h>

struct dev_defn {
    enum chardev_id id;
    uintptr_t paddr;
    int   size;
    const int* irqs;
    int (*init_fn)(const struct dev_defn* defn,
                   const ps_io_ops_t* ops,
                   struct ps_chardevice* dev);
};

static inline void*
chardev_map(const struct dev_defn* d, const ps_io_ops_t* o)
{
    return ps_io_map((ps_io_mapper_t*)&o->io_mapper, (uintptr_t) d->paddr, d->size, 0, PS_MEM_NORMAL);
}

int uart_init(const struct dev_defn* defn, const ps_io_ops_t* ops, ps_chardevice_t* dev);
int uart_static_init(void *vaddr, const ps_io_ops_t* ops, ps_chardevice_t* dev);
ssize_t uart_write(ps_chardevice_t* d, const void* vdata, size_t count, chardev_callback_t rcb UNUSED, void* token UNUSED);
ssize_t uart_read(ps_chardevice_t* d, void* vdata, size_t count, chardev_callback_t rcb UNUSED, void* token UNUSED);
int uart_getchar(ps_chardevice_t *d);
int uart_putchar(ps_chardevice_t* d, int c);