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| Rev | Author | Line No. | Line |
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| 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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| 2089 | decky | 37 | #include <ipc/irq.h> |
| 575 | palkovsky | 38 | #include <arch/drivers/serial.h> |
| 39 | #include <console/chardev.h> |
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| 40 | #include <console/console.h> |
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| 2456 | hudecek | 41 | #include <synch/rcu.h> |
| 575 | palkovsky | 42 | |
| 1936 | decky | 43 | #define SERIAL_IRQ 2 |
| 44 | |||
| 45 | static irq_t serial_irq; |
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| 575 | palkovsky | 46 | static chardev_t console; |
| 47 | static serial_t sconf[SERIAL_MAX]; |
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| 577 | palkovsky | 48 | static bool kb_enabled; |
| 575 | palkovsky | 49 | |
| 50 | static void serial_write(chardev_t *d, const char ch) |
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| 51 | { |
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| 52 | serial_t *sd = (serial_t *)d->data; |
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| 53 | |||
| 54 | if (ch == '\n') |
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| 55 | serial_write(d, '\r'); |
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| 56 | /* Wait until transmit buffer empty */ |
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| 57 | while (! (SERIAL_READ_LSR(sd->port) & (1<<TRANSMIT_EMPTY_BIT))) |
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| 58 | ; |
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| 59 | SERIAL_WRITE(sd->port, ch); |
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| 60 | } |
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| 61 | |||
| 62 | static void serial_enable(chardev_t *d) |
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| 63 | { |
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| 577 | palkovsky | 64 | kb_enabled = true; |
| 575 | palkovsky | 65 | } |
| 66 | |||
| 67 | static void serial_disable(chardev_t *d) |
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| 68 | { |
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| 577 | palkovsky | 69 | kb_enabled = false; |
| 575 | palkovsky | 70 | } |
| 71 | |||
| 72 | int serial_init(void) |
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| 73 | { |
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| 74 | int i = 0; |
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| 75 | if (SERIAL_READ_LSR(SERIAL_COM1) == 0x60) { |
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| 76 | sconf[i].port = SERIAL_COM1; |
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| 77 | sconf[i].irq = SERIAL_COM1_IRQ; |
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| 78 | /* Enable interrupt on available data */ |
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| 79 | i++; |
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| 80 | } |
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| 81 | return i; |
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| 82 | } |
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| 83 | |||
| 607 | palkovsky | 84 | /** Read character from serial port, wait until available */ |
| 85 | static char serial_do_read(chardev_t *dev) |
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| 86 | { |
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| 87 | serial_t *sd = (serial_t *)dev->data; |
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| 88 | char ch; |
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| 575 | palkovsky | 89 | |
| 607 | palkovsky | 90 | while (!(SERIAL_READ_LSR(sd->port) & 1)) |
| 91 | ; |
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| 92 | ch = SERIAL_READ(sd->port); |
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| 93 | |||
| 94 | if (ch =='\r') |
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| 95 | ch = '\n'; |
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| 96 | return ch; |
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| 97 | } |
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| 98 | |||
| 1936 | decky | 99 | static void serial_handler(void) |
| 575 | palkovsky | 100 | { |
| 1936 | decky | 101 | serial_t *sd = (serial_t *) console.data; |
| 575 | palkovsky | 102 | char ch; |
| 103 | |||
| 104 | if (!(SERIAL_READ_LSR(sd->port) & 1)) |
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| 105 | return; |
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| 106 | ch = SERIAL_READ(sd->port); |
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| 107 | |||
| 108 | if (ch =='\r') |
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| 109 | ch = '\n'; |
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| 110 | chardev_push_character(&console, ch); |
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| 111 | } |
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| 112 | |||
| 1936 | decky | 113 | /** Process keyboard interrupt. Does not work in simics? */ |
| 114 | static void serial_irq_handler(irq_t *irq, void *arg, ...) |
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| 115 | { |
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| 2456 | hudecek | 116 | if ((rcu_dereference_pointer(irq->notif_cfg).notify) && (rcu_dereference_pointer(irq->notif_cfg).answerbox)) |
| 1936 | decky | 117 | ipc_irq_send_notif(irq); |
| 118 | else |
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| 119 | serial_handler(); |
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| 120 | } |
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| 575 | palkovsky | 121 | |
| 1936 | decky | 122 | static irq_ownership_t serial_claim(void) |
| 123 | { |
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| 124 | return IRQ_ACCEPT; |
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| 125 | } |
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| 607 | palkovsky | 126 | |
| 127 | static chardev_operations_t serial_ops = { |
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| 128 | .resume = serial_enable, |
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| 129 | .suspend = serial_disable, |
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| 130 | .write = serial_write, |
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| 131 | .read = serial_do_read |
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| 132 | }; |
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| 133 | |||
| 1936 | decky | 134 | void serial_console(devno_t devno) |
| 575 | palkovsky | 135 | { |
| 136 | serial_t *sd = &sconf[0]; |
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| 137 | |||
| 138 | |||
| 139 | chardev_initialize("serial_console", &console, &serial_ops); |
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| 140 | console.data = sd; |
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| 577 | palkovsky | 141 | kb_enabled = true; |
| 1936 | decky | 142 | |
| 143 | irq_initialize(&serial_irq); |
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| 144 | serial_irq.devno = devno; |
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| 145 | serial_irq.inr = SERIAL_IRQ; |
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| 146 | serial_irq.claim = serial_claim; |
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| 147 | serial_irq.handler = serial_irq_handler; |
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| 148 | irq_register(&serial_irq); |
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| 575 | palkovsky | 149 | |
| 150 | /* I don't know why, but the serial interrupts simply |
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| 151 | * don't work on simics |
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| 152 | */ |
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| 1955 | decky | 153 | virtual_timer_fnc = &serial_handler; |
| 575 | palkovsky | 154 | |
| 606 | palkovsky | 155 | stdin = &console; |
| 156 | stdout = &console; |
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| 575 | palkovsky | 157 | } |
| 1702 | cejka | 158 | |
| 1888 | jermar | 159 | /** @} |
| 1702 | cejka | 160 | */ |