| 1 | /*
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| 2 | * Copyright (c) 2001-2004 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup genarch
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | * @brief Headers for NS 16550 serial controller.
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| 35 | */
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| 36 |
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| 37 | #ifndef KERN_NS16550_H_
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| 38 | #define KERN_NS16550_H_
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| 39 |
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| 40 | #include <ddi/irq.h>
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| 41 | #include <arch/types.h>
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| 42 | #include <console/chardev.h>
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| 43 |
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| 44 | #define IER_ERBFI 0x01 /** Enable Receive Buffer Full Interrupt. */
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| 45 |
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| 46 | #define LCR_DLAB 0x80 /** Divisor Latch Access bit. */
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| 47 |
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| 48 | #define MCR_OUT2 0x08 /** OUT2. */
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| 49 |
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| 50 | /** NS16550 registers. */
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| 51 | struct ns16550 {
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| 52 | ioport8_t rbr; /**< Receiver Buffer Register. */
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| 53 | ioport8_t ier; /**< Interrupt Enable Register. */
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| 54 | union {
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| 55 | ioport8_t iir; /**< Interrupt Ident Register (read). */
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| 56 | ioport8_t fcr; /**< FIFO control register (write). */
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| 57 | } __attribute__ ((packed));
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| 58 | ioport8_t lcr; /**< Line Control register. */
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| 59 | ioport8_t mcr; /**< Modem Control Register. */
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| 60 | ioport8_t lsr; /**< Line Status Register. */
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| 61 | } __attribute__ ((packed));
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| 62 | typedef struct ns16550 ns16550_t;
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| 63 |
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| 64 | /** Structure representing the ns16550 device. */
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| 65 | typedef struct ns16550_instance {
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| 66 | devno_t devno;
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| 67 | ns16550_t *ns16550;
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| 68 | irq_t irq;
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| 69 | chardev_t *devout;
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| 70 | } ns16550_instance_t;
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| 71 |
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| 72 | extern bool ns16550_init(ns16550_t *, devno_t, inr_t, cir_t, void *,
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| 73 | chardev_t *);
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| 74 | extern irq_ownership_t ns16550_claim(irq_t *);
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| 75 | extern void ns16550_irq_handler(irq_t *);
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| 76 |
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| 77 | #endif
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| 78 |
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| 79 | /** @}
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| 80 | */
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