1 files changed, 0 insertions, 114 deletions
diff --git a/src/kernel/arch/i386/driver/serial.c b/src/kernel/arch/i386/driver/serial.c
deleted file mode 100644
index dac5b75..0000000
--- a/src/kernel/arch/i386/driver/serial.c
+++ /dev/null
@@ -1,114 +0,0 @@
-#include <kernel/arch/i386/driver/serial.h>
-#include <kernel/arch/i386/interrupts/irq.h>
-#include <kernel/arch/i386/port_io.h>
-#include <kernel/mem/virt.h>
-#include <kernel/panic.h>
-#include <shared/container/ring.h>
-#include <shared/mem.h>
-#include <stdint.h>
-
-#define BACKLOG_CAPACITY 64
-static volatile uint8_t backlog_buf[BACKLOG_CAPACITY];
-static volatile ring_t backlog = {(void*)backlog_buf, BACKLOG_CAPACITY, 0, 0};
-
-static const int COM1 = 0x3f8;
-
-static void accept(struct vfs_request *req);
-static bool is_ready(struct vfs_backend *self);
-
-static struct vfs_request *blocked_on = NULL;
-static struct vfs_backend backend = BACKEND_KERN(is_ready, accept);
-void serial_init(void) { vfs_mount_root_register("/com1", &backend); }
-
-
-static void serial_selftest(void) {
-	char b = 0x69;
-	port_out8(COM1 + 4, 0b00011110); // enable loopback mode
-	port_out8(COM1, b);
-	assert(port_in8(COM1) == b);
-}
-
-void serial_preinit(void) {
-	// see https://www.sci.muni.cz/docs/pc/serport.txt
-	// set baud rate divisor
-	port_out8(COM1 + 3, 0b10000000); // enable DLAB
-	port_out8(COM1 + 0, 0x01);       // divisor = 1 (low  byte)
-	port_out8(COM1 + 1, 0x00);       //             (high byte)
-
-	port_out8(COM1 + 3, 0b00000011); // 8 bits, no parity, one stop bit
-	port_out8(COM1 + 1, 0x01);       // enable the Data Ready IRQ
-	port_out8(COM1 + 2, 0b11000111); // enable FIFO with 14-bit trigger level (???)
-
-	serial_selftest();
-
-	port_out8(COM1 + 4, 0b00001111); // enable everything in the MCR
-}
-
-
-void serial_irq(void) {
-	ring_put1b((void*)&backlog, port_in8(COM1));
-	if (blocked_on) {
-		accept(blocked_on);
-		blocked_on = NULL;
-		vfs_backend_tryaccept(&backend);
-	}
-}
-
-
-static void serial_putchar(char c) {
-	while ((port_in8(COM1 + 5) & 0x20) == 0); // wait for THRE
-	port_out8(COM1, c);
-}
-
-void serial_write(const char *buf, size_t len) {
-	for (size_t i = 0; i < len; i++)
-		serial_putchar(buf[i]);
-}
-
-
-static void accept(struct vfs_request *req) {
-	static char buf[32];
-	int ret;
-	bool valid;
-	switch (req->type) {
-		case VFSOP_OPEN:
-			valid = req->input.len == 0;
-			vfsreq_finish_short(req, valid ? 0 : -1);
-			break;
-		case VFSOP_READ:
-			if (ring_size((void*)&backlog) == 0) {
-				/* nothing to read, join queue */
-				assert(!req->postqueue_next);
-				struct vfs_request **slot = &blocked_on;
-				while (*slot)
-					slot = &(*slot)->postqueue_next;
-				*slot = req;
-			} else if (req->caller) {
-				ret = clamp(0, req->output.len, sizeof buf);
-				ret = ring_get((void*)&backlog, buf, ret);
-				virt_cpy_to(req->caller->pages, req->output.buf, buf, ret);
-				vfsreq_finish_short(req, ret);
-			} else {
-				vfsreq_finish_short(req, -1);
-			}
-			break;
-		case VFSOP_WRITE:
-			if (req->caller) {
-				struct virt_iter iter;
-				virt_iter_new(&iter, req->input.buf, req->input.len,
-						req->caller->pages, true, false);
-				while (virt_iter_next(&iter))
-					serial_write(iter.frag, iter.frag_len);
-				ret = iter.prior;
-			} else ret = -1;
-			vfsreq_finish_short(req, ret);
-			break;
-		default:
-			vfsreq_finish_short(req, -1);
-			break;
-	}
-}
-
-static bool is_ready(struct vfs_backend __attribute__((unused)) *self) {
-	return true;
-}