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| Rev | Author | Line No. | Line |
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| 1844 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2001-2004 Jakub Jermar |
| 1844 | jermar | 3 | * All rights reserved. |
| 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 | |||
| 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 port / keyboard driver. |
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| 35 | */ |
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| 36 | |||
| 37 | #ifndef KERN_NS16550_H_ |
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| 38 | #define KERN_NS16550_H_ |
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| 39 | |||
| 2089 | decky | 40 | #include <console/chardev.h> |
| 41 | #include <ipc/irq.h> |
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| 1896 | jermar | 42 | |
| 1921 | jermar | 43 | extern void ns16550_init(devno_t devno, inr_t inr, uintptr_t vaddr); |
| 1844 | jermar | 44 | extern void ns16550_poll(void); |
| 45 | extern void ns16550_grab(void); |
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| 46 | extern void ns16550_release(void); |
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| 1896 | jermar | 47 | extern char ns16550_key_read(chardev_t *d); |
| 1919 | jermar | 48 | extern irq_ownership_t ns16550_claim(void); |
| 49 | extern void ns16550_irq_handler(irq_t *irq, void *arg, ...); |
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| 1844 | jermar | 50 | |
| 3593 | rimsky | 51 | #include <arch/types.h> |
| 52 | #ifndef ia64 |
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| 53 | #include <arch/drivers/kbd.h> |
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| 1844 | jermar | 54 | #endif |
| 3593 | rimsky | 55 | /* NS16550 registers */ |
| 56 | #define RBR_REG 0 /** Receiver Buffer Register. */ |
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| 57 | #define IER_REG 1 /** Interrupt Enable Register. */ |
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| 58 | #define IIR_REG 2 /** Interrupt Ident Register (read). */ |
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| 59 | #define FCR_REG 2 /** FIFO control register (write). */ |
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| 60 | #define LCR_REG 3 /** Line Control register. */ |
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| 61 | #define LSR_REG 5 /** Line Status Register. */ |
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| 1844 | jermar | 62 | |
| 3593 | rimsky | 63 | #define IER_ERBFI 0x01 /** Enable Receive Buffer Full Interrupt. */ |
| 64 | |||
| 65 | #define LCR_DLAB 0x80 /** Divisor Latch Access bit. */ |
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| 66 | |||
| 67 | /** Structure representing the ns16550 device. */ |
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| 68 | typedef struct { |
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| 69 | devno_t devno; |
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| 70 | volatile ioport_t io_port; /** Memory mapped registers of the ns16550. */ |
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| 71 | } ns16550_t; |
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| 72 | |||
| 73 | static inline uint8_t ns16550_rbr_read(ns16550_t *dev) |
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| 74 | { |
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| 75 | return inb(dev->io_port+RBR_REG); |
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| 76 | } |
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| 77 | static inline void ns16550_rbr_write(ns16550_t *dev, uint8_t v) |
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| 78 | { |
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| 79 | outb(dev->io_port+RBR_REG,v); |
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| 80 | } |
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| 81 | |||
| 82 | static inline uint8_t ns16550_ier_read(ns16550_t *dev) |
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| 83 | { |
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| 84 | return inb(dev->io_port+IER_REG); |
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| 85 | } |
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| 86 | |||
| 87 | static inline void ns16550_ier_write(ns16550_t *dev, uint8_t v) |
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| 88 | { |
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| 89 | outb(dev->io_port+IER_REG,v); |
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| 90 | } |
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| 91 | |||
| 92 | static inline uint8_t ns16550_iir_read(ns16550_t *dev) |
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| 93 | { |
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| 94 | return inb(dev->io_port+IIR_REG); |
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| 95 | } |
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| 96 | |||
| 97 | static inline void ns16550_fcr_write(ns16550_t *dev, uint8_t v) |
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| 98 | { |
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| 99 | outb(dev->io_port+FCR_REG,v); |
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| 100 | } |
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| 101 | |||
| 102 | static inline uint8_t ns16550_lcr_read(ns16550_t *dev) |
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| 103 | { |
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| 104 | return inb(dev->io_port+LCR_REG); |
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| 105 | } |
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| 106 | |||
| 107 | static inline void ns16550_lcr_write(ns16550_t *dev, uint8_t v) |
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| 108 | { |
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| 109 | outb(dev->io_port+LCR_REG,v); |
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| 110 | } |
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| 111 | |||
| 112 | static inline uint8_t ns16550_lsr_read(ns16550_t *dev) |
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| 113 | { |
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| 114 | return inb(dev->io_port+LSR_REG); |
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| 115 | } |
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| 116 | |||
| 117 | |||
| 118 | |||
| 119 | #endif |
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| 120 | |||
| 1844 | jermar | 121 | /** @} |
| 122 | */ |