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qemu_pci_serial driver

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This commit is contained in:
Kamil Kowalczyk
2025-11-23 22:56:45 +01:00
parent d3a91b6438
commit 33b3a641fb
10 changed files with 141 additions and 99 deletions
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2
kernel/dev/dev.c
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@ -4,7 +4,6 @@
#include "std/string.h"
#include "dev/dev.h"
#include "dev/ps2kbdev.h"
#include "dev/serialdev.h"
#include "hshtb.h"
DevTable DEVTABLE;
@ -14,5 +13,4 @@ void dev_init(void) {
spinlock_init(&DEVTABLE.spinlock);
ps2kbdev_init();
serialdev_init();
}

81
kernel/dev/serialdev.c
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@ -1,81 +0,0 @@
#include <stdint.h>
#include <stddef.h>
#include "dev/dev.h"
#include "dev/serialdev.h"
#include "util/util.h"
#include "sysdefs/dev.h"
#include "io/io.h"
#include "errors.h"
#include "hshtb.h"
#include "kprintf.h"
// https://wiki.osdev.org/Serial_Ports
#define PORT 0x3f8
void serial_init(void) {
io_out8(PORT+1, 0x00);
io_out8(PORT+3, 0x80);
io_out8(PORT+0, 0x03);
io_out8(PORT+1, 0x00);
io_out8(PORT+3, 0x03);
io_out8(PORT+2, 0xC7);
io_out8(PORT+4, 0x0B);
io_out8(PORT+4, 0x1E);
io_out8(PORT+0, 0xAE);
if (io_in8(PORT+0) != 0xAE) {
ERR("serial", "serial is faulty!\n");
return;
}
io_out8(PORT+4, 0x0F);
}
int serial_recvready(void) {
return io_in8(PORT+5) & 1;
}
uint8_t serial_recvb(void) {
return io_in8(PORT);
}
int serial_sendready(void) {
return io_in8(PORT+5) & 0x20;
}
void serial_sendb(uint8_t b) {
io_out8(PORT, b);
}
int32_t serialdev_sendb(struct Dev *dev, uint8_t *buffer, size_t len, uint64_t pid) {
(void)dev; (void)len; (void)pid;
serial_sendb(buffer[0]);
return E_OK;
}
int32_t serialdev_sendready(struct Dev *dev, uint8_t *buffer, size_t len, uint64_t pid) {
(void)dev; (void)buffer; (void)len; (void)pid;
return serial_sendready();
}
int32_t serialdev_recvb(struct Dev *dev, uint8_t *buffer, size_t len, uint64_t pid) {
(void)dev; (void)buffer; (void)len; (void)pid;
return serial_recvb();
}
int32_t serialdev_recvready(struct Dev *dev, uint8_t *buffer, size_t len, uint64_t pid) {
(void)dev; (void)buffer; (void)len; (void)pid;
return serial_recvready();
}
void serialdev_init(void) {
Dev *serialdev = NULL;
HSHTB_ALLOC(DEVTABLE.devs, ident, "serialdev", serialdev);
serialdev->fns[DEV_SERIALDEV_SENDB] = &serialdev_sendb;
serialdev->fns[DEV_SERIALDEV_SENDREADY] = &serialdev_sendready;
serialdev->fns[DEV_SERIALDEV_RECVB] = &serialdev_recvb;
serialdev->fns[DEV_SERIALDEV_RECVREADY] = &serialdev_recvready;
spinlock_init(&serialdev->spinlock);
serial_init();
}

6
kernel/dev/serialdev.h
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@ -1,6 +0,0 @@
#ifndef DEV_SERIALDEV_H_
#define DEV_SERIALDEV_H_
void serialdev_init(void);
#endif // DEV_SERIALDEV_H_