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/*
* Copyright (c) 2016, Linaro Limited
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __DRIVERS_SERIAL_H
#define __DRIVERS_SERIAL_H
#include <assert.h>
#include <stdbool.h>
#include <types_ext.h>
#include <mm/core_memprot.h>
#include <mm/core_mmu.h>
struct serial_chip {
const struct serial_ops *ops;
};
struct serial_ops {
void (*putc)(struct serial_chip *chip, int ch);
void (*flush)(struct serial_chip *chip);
bool (*have_rx_data)(struct serial_chip *chip);
int (*getchar)(struct serial_chip *chip);
};
struct io_pa_va {
paddr_t pa;
vaddr_t va;
};
/*
* Helper function to return a physical or virtual address for a device,
* depending on whether the MMU is enabled or not
*/
static inline vaddr_t io_pa_or_va(struct io_pa_va *p)
{
assert(p->pa);
if (cpu_mmu_enabled()) {
if (!p->va)
p->va = (vaddr_t)phys_to_virt_io(p->pa);
assert(p->va);
return p->va;
}
return p->pa;
}
#endif /*__DRIVERS_SERIASERIAL_H*/
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