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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 | |||
3907 | decky | 40 | #include <console/chardev.h> |
3655 | jermar | 41 | #include <ddi/irq.h> |
2089 | decky | 42 | #include <ipc/irq.h> |
1896 | jermar | 43 | |
3655 | jermar | 44 | extern void ns16550_init(devno_t, uintptr_t, inr_t, cir_t, void *); |
1844 | jermar | 45 | extern void ns16550_poll(void); |
46 | extern void ns16550_grab(void); |
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47 | extern void ns16550_release(void); |
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3655 | jermar | 48 | extern char ns16550_key_read(chardev_t *); |
3906 | jermar | 49 | extern irq_ownership_t ns16550_claim(void *); |
50 | extern void ns16550_irq_handler(irq_t *); |
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1844 | jermar | 51 | |
3577 | vana | 52 | #include <arch/types.h> |
53 | #include <arch/drivers/kbd.h> |
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3907 | decky | 54 | |
3577 | vana | 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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3646 | jermar | 61 | #define MCR_REG 4 /** Modem Control Register. */ |
3577 | vana | 62 | #define LSR_REG 5 /** Line Status Register. */ |
1844 | jermar | 63 | |
3577 | vana | 64 | #define IER_ERBFI 0x01 /** Enable Receive Buffer Full Interrupt. */ |
65 | |||
66 | #define LCR_DLAB 0x80 /** Divisor Latch Access bit. */ |
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67 | |||
3646 | jermar | 68 | #define MCR_OUT2 0x08 /** OUT2. */ |
69 | |||
3577 | vana | 70 | /** Structure representing the ns16550 device. */ |
71 | typedef struct { |
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72 | devno_t devno; |
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3646 | jermar | 73 | /** Memory mapped registers of the ns16550. */ |
74 | volatile ioport_t io_port; |
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3577 | vana | 75 | } ns16550_t; |
76 | |||
77 | static inline uint8_t ns16550_rbr_read(ns16550_t *dev) |
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78 | { |
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3902 | jermar | 79 | return pio_read_8(dev->io_port + RBR_REG); |
3577 | vana | 80 | } |
81 | static inline void ns16550_rbr_write(ns16550_t *dev, uint8_t v) |
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82 | { |
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3902 | jermar | 83 | pio_write_8(dev->io_port + RBR_REG, v); |
3577 | vana | 84 | } |
85 | |||
86 | static inline uint8_t ns16550_ier_read(ns16550_t *dev) |
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87 | { |
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3902 | jermar | 88 | return pio_read_8(dev->io_port + IER_REG); |
3577 | vana | 89 | } |
90 | |||
91 | static inline void ns16550_ier_write(ns16550_t *dev, uint8_t v) |
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92 | { |
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3902 | jermar | 93 | pio_write_8(dev->io_port + IER_REG, v); |
3577 | vana | 94 | } |
95 | |||
96 | static inline uint8_t ns16550_iir_read(ns16550_t *dev) |
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97 | { |
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3902 | jermar | 98 | return pio_read_8(dev->io_port + IIR_REG); |
3577 | vana | 99 | } |
100 | |||
101 | static inline void ns16550_fcr_write(ns16550_t *dev, uint8_t v) |
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102 | { |
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3902 | jermar | 103 | pio_write_8(dev->io_port + FCR_REG, v); |
3577 | vana | 104 | } |
105 | |||
106 | static inline uint8_t ns16550_lcr_read(ns16550_t *dev) |
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107 | { |
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3902 | jermar | 108 | return pio_read_8(dev->io_port + LCR_REG); |
3577 | vana | 109 | } |
110 | |||
111 | static inline void ns16550_lcr_write(ns16550_t *dev, uint8_t v) |
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112 | { |
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3902 | jermar | 113 | pio_write_8(dev->io_port + LCR_REG, v); |
3577 | vana | 114 | } |
115 | |||
116 | static inline uint8_t ns16550_lsr_read(ns16550_t *dev) |
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117 | { |
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3902 | jermar | 118 | return pio_read_8(dev->io_port + LSR_REG); |
3577 | vana | 119 | } |
120 | |||
3646 | jermar | 121 | static inline uint8_t ns16550_mcr_read(ns16550_t *dev) |
122 | { |
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3902 | jermar | 123 | return pio_read_8(dev->io_port + MCR_REG); |
3646 | jermar | 124 | } |
3577 | vana | 125 | |
3646 | jermar | 126 | static inline void ns16550_mcr_write(ns16550_t *dev, uint8_t v) |
127 | { |
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3902 | jermar | 128 | pio_write_8(dev->io_port + MCR_REG, v); |
3646 | jermar | 129 | } |
3577 | vana | 130 | |
131 | #endif |
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132 | |||
1844 | jermar | 133 | /** @} |
134 | */ |