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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 575 | palkovsky | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2005 Ondrej Palkovsky |
| 575 | palkovsky | 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 | |||
| 1888 | jermar | 29 | /** @addtogroup mips32 |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 575 | palkovsky | 35 | #include <interrupt.h> |
| 36 | #include <arch/cp0.h> |
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| 37 | #include <arch/drivers/serial.h> |
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| 38 | #include <console/chardev.h> |
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| 39 | #include <console/console.h> |
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| 1936 | decky | 40 | #include <ddi/irq.h> |
| 575 | palkovsky | 41 | |
| 1936 | decky | 42 | #define SERIAL_IRQ 2 |
| 43 | |||
| 44 | static irq_t serial_irq; |
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| 575 | palkovsky | 45 | static chardev_t console; |
| 46 | static serial_t sconf[SERIAL_MAX]; |
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| 577 | palkovsky | 47 | static bool kb_enabled; |
| 575 | palkovsky | 48 | |
| 49 | static void serial_write(chardev_t *d, const char ch) |
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| 50 | { |
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| 51 | serial_t *sd = (serial_t *)d->data; |
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| 52 | |||
| 53 | if (ch == '\n') |
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| 54 | serial_write(d, '\r'); |
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| 55 | /* Wait until transmit buffer empty */ |
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| 56 | while (! (SERIAL_READ_LSR(sd->port) & (1<<TRANSMIT_EMPTY_BIT))) |
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| 57 | ; |
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| 58 | SERIAL_WRITE(sd->port, ch); |
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| 59 | } |
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| 60 | |||
| 61 | static void serial_enable(chardev_t *d) |
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| 62 | { |
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| 577 | palkovsky | 63 | kb_enabled = true; |
| 575 | palkovsky | 64 | } |
| 65 | |||
| 66 | static void serial_disable(chardev_t *d) |
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| 67 | { |
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| 577 | palkovsky | 68 | kb_enabled = false; |
| 575 | palkovsky | 69 | } |
| 70 | |||
| 71 | int serial_init(void) |
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| 72 | { |
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| 73 | int i = 0; |
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| 74 | if (SERIAL_READ_LSR(SERIAL_COM1) == 0x60) { |
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| 75 | sconf[i].port = SERIAL_COM1; |
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| 76 | sconf[i].irq = SERIAL_COM1_IRQ; |
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| 77 | /* Enable interrupt on available data */ |
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| 78 | i++; |
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| 79 | } |
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| 80 | return i; |
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| 81 | } |
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| 82 | |||
| 607 | palkovsky | 83 | /** Read character from serial port, wait until available */ |
| 84 | static char serial_do_read(chardev_t *dev) |
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| 85 | { |
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| 86 | serial_t *sd = (serial_t *)dev->data; |
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| 87 | char ch; |
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| 575 | palkovsky | 88 | |
| 607 | palkovsky | 89 | while (!(SERIAL_READ_LSR(sd->port) & 1)) |
| 90 | ; |
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| 91 | ch = SERIAL_READ(sd->port); |
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| 92 | |||
| 93 | if (ch =='\r') |
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| 94 | ch = '\n'; |
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| 95 | return ch; |
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| 96 | } |
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| 97 | |||
| 1936 | decky | 98 | static void serial_handler(void) |
| 575 | palkovsky | 99 | { |
| 1936 | decky | 100 | serial_t *sd = (serial_t *) console.data; |
| 575 | palkovsky | 101 | char ch; |
| 102 | |||
| 103 | if (!(SERIAL_READ_LSR(sd->port) & 1)) |
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| 104 | return; |
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| 105 | ch = SERIAL_READ(sd->port); |
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| 106 | |||
| 107 | if (ch =='\r') |
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| 108 | ch = '\n'; |
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| 109 | chardev_push_character(&console, ch); |
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| 110 | } |
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| 111 | |||
| 1936 | decky | 112 | /** Process keyboard interrupt. Does not work in simics? */ |
| 113 | static void serial_irq_handler(irq_t *irq, void *arg, ...) |
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| 114 | { |
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| 115 | if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox)) |
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| 116 | ipc_irq_send_notif(irq); |
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| 117 | else |
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| 118 | serial_handler(); |
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| 119 | } |
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| 575 | palkovsky | 120 | |
| 1936 | decky | 121 | static irq_ownership_t serial_claim(void) |
| 122 | { |
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| 123 | return IRQ_ACCEPT; |
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| 124 | } |
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| 607 | palkovsky | 125 | |
| 126 | static chardev_operations_t serial_ops = { |
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| 127 | .resume = serial_enable, |
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| 128 | .suspend = serial_disable, |
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| 129 | .write = serial_write, |
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| 130 | .read = serial_do_read |
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| 131 | }; |
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| 132 | |||
| 1936 | decky | 133 | void serial_console(devno_t devno) |
| 575 | palkovsky | 134 | { |
| 135 | serial_t *sd = &sconf[0]; |
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| 136 | |||
| 137 | |||
| 138 | chardev_initialize("serial_console", &console, &serial_ops); |
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| 139 | console.data = sd; |
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| 577 | palkovsky | 140 | kb_enabled = true; |
| 1936 | decky | 141 | |
| 142 | irq_initialize(&serial_irq); |
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| 143 | serial_irq.devno = devno; |
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| 144 | serial_irq.inr = SERIAL_IRQ; |
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| 145 | serial_irq.claim = serial_claim; |
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| 146 | serial_irq.handler = serial_irq_handler; |
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| 147 | irq_register(&serial_irq); |
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| 575 | palkovsky | 148 | |
| 149 | /* I don't know why, but the serial interrupts simply |
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| 150 | * don't work on simics |
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| 151 | */ |
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| 1955 | decky | 152 | virtual_timer_fnc = &serial_handler; |
| 575 | palkovsky | 153 | |
| 606 | palkovsky | 154 | stdin = &console; |
| 155 | stdout = &console; |
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| 575 | palkovsky | 156 | } |
| 1702 | cejka | 157 | |
| 1888 | jermar | 158 | /** @} |
| 1702 | cejka | 159 | */ |