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-rw-r--r--sys/kern/kern_tty.c304
1 files changed, 0 insertions, 304 deletions
diff --git a/sys/kern/kern_tty.c b/sys/kern/kern_tty.c
deleted file mode 100644
index e47c2e2..0000000
--- a/sys/kern/kern_tty.c
+++ /dev/null
@@ -1,304 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/tty.h>
-#include <sys/system.h>
-#include <sys/cdefs.h>
-#include <sys/errno.h>
-#include <sys/syslog.h>
-#include <sys/ascii.h>
-#include <dev/vcons/vcons_io.h>
-#include <fs/devfs.h>
-#include <string.h>
-
-static dev_t tty_major = 0;
-struct tty g_root_tty = {
- .scr = &g_syslog_screen,
- .ring = {
- .enq_index = 0,
- .deq_index = 0,
- },
- .termios = {
- .c_lflag = ICANON | ECHO
- }
-};
-
-static inline dev_t
-tty_alloc_id(void)
-{
- static dev_t id = 1;
-
- return id++;
-}
-
-static inline bool
-tty_is_special(char c)
-{
- return c < 0x1F;
-}
-
-static inline void
-tty_reset_ring(struct tty_ring *ring)
-{
- ring->enq_index = 0;
- ring->deq_index = 0;
-}
-
-static void
-tty_process(struct tty *tty, char c, bool echo)
-{
- const struct termios *termios;
- bool canon, special;
-
- termios = &tty->termios;
- canon = __TEST(termios->c_lflag, ICANON);
- special = tty_is_special(c);
-
- if (canon && special)
- vcons_process_output(tty->scr, c);
- if (echo && !special)
- vcons_putch(tty->scr, c);
-}
-
-/*
- * Flushes the TTY ring buffer.
- *
- * @tty: TTY to flush.
- *
- * Returns number of bytes flushed.
- */
-static ssize_t
-__tty_flush(struct tty *tty)
-{
- struct tty_ring *ring = &tty->ring;
- struct tty_ring *outring = &tty->outring;
- size_t count = 0;
- char tmp;
-
- /* Do we have any data left? */
- if (ring->deq_index >= ring->enq_index)
- return -EAGAIN;
-
- /*
- * Flush the input ring to the output ring
- * to allow user programs to fetch from it
- * with /dev/ttyN.
- */
- while (ring->deq_index < ring->enq_index) {
- tmp = ring->data[ring->deq_index++];
- outring->data[outring->enq_index++] = tmp;
-
- if (outring->enq_index > TTY_RING_SIZE)
- tty_reset_ring(outring);
-
- ++count;
- }
-
- tty_reset_ring(ring);
- return count;
-}
-
-static int
-tty_dev_read(struct device *dev, struct sio_txn *sio)
-{
- struct tty_ring *ring = &g_root_tty.outring;
- size_t len, max_len;
-
- spinlock_acquire(&g_root_tty.rlock);
- max_len = (ring->enq_index - ring->deq_index);
- len = sio->len;
-
- if (len > max_len)
- len = max_len;
-
- /*
- * Transfer data from the TTY ring with SIO then
- * ensure the ring is clean by resetting it.
- *
- * TODO: As of now we are just reading the root
- * TTY, add support for multiple TTYs.
- */
- memcpy(sio->buf, ring->data, len);
- tty_reset_ring(ring);
- spinlock_release(&g_root_tty.rlock);
- return len;
-}
-
-static int
-tty_dev_ioctl(struct device *dev, uint32_t cmd, uintptr_t arg)
-{
- /* TODO: Support multiple TTYs */
- struct termios *tp = &g_root_tty.termios;
-
- switch (cmd) {
- case TCGETS:
- copyout(tp, arg, sizeof(struct termios));
- break;
- case TCSETS:
- copyin(arg, tp, sizeof(struct termios));
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int
-tty_dev_open(struct device *dev)
-{
- /* TODO: Support multiple TTYs */
- struct tty *tty = &g_root_tty;
- struct tty_ring *ring = &tty->outring;
-
- /* Ensure the ring is clean */
- spinlock_acquire(&tty->rlock);
- tty_reset_ring(ring);
- spinlock_release(&tty->rlock);
- return 0;
-}
-
-/*
- * Serialized wrapper over __tty_flush()
- */
-ssize_t
-tty_flush(struct tty *tty)
-{
- ssize_t ret;
-
- spinlock_acquire(&tty->rlock);
- ret = __tty_flush(tty);
- spinlock_release(&tty->rlock);
- return ret;
-}
-
-/*
- * Write a character to a TTY
- *
- * @tty: TTY to write to.
- * @c: Character to write.
- */
-int
-tty_putc(struct tty *tty, int c, int flags)
-{
- struct tty_ring *ring;
- const struct termios *termios;
- bool canon, echo;
-
- ring = &tty->ring;
- termios = &tty->termios;
-
- canon = __TEST(termios->c_lflag, ICANON);
- echo = __TEST(termios->c_lflag, ECHO);
-
- spinlock_acquire(&tty->rlock);
- ring->data[ring->enq_index++] = c;
-
- /*
- * Process the characters for both device input
- * and raw input. Device input will only be echoed
- * if the ECHO bit is set within c_lflag
- */
- if (__TEST(flags, TTY_SOURCE_DEV) && echo)
- tty_process(tty, c, echo);
- if (__TEST(flags, TTY_SOURCE_RAW))
- tty_process(tty, c, true);
-
- /*
- * If we are in canonical mode and we have a linefeed ('\n')
- * character, we should flush the ring.
- */
- if (canon && c == ASCII_LF) {
- __tty_flush(tty);
- }
-
- /*
- * Just flush the ring if we aren't in canonical
- * mode.
- */
- if (!canon) {
- __tty_flush(tty);
- }
-
- /* Reset the ring if it is full */
- if (ring->enq_index >= TTY_RING_SIZE) {
- tty_reset_ring(ring);
- }
-
- spinlock_release(&tty->rlock);
- return 0;
-}
-
-/*
- * Write a string to a TTY
- *
- * @tty: TTY to write to.
- * @s: String to write.
- * @count: Number of bytes to write.
- */
-int
-tty_putstr(struct tty *tty, const char *s, size_t count)
-{
- for (size_t i = 0; i < count; ++i) {
- tty_putc(tty, *s++, TTY_SOURCE_RAW);
- }
-
- return 0;
-}
-
-dev_t
-tty_attach(struct tty *tty)
-{
- int tmp;
- char devname[128];
- struct device *dev = device_alloc();
-
- if (dev == NULL)
- return -ENOMEM;
-
- /*
- * Allocate a major for the driver if we don't
- * have one yet.
- */
- if (tty_major == 0)
- tty_major = device_alloc_major();
-
- /* Now try to create the device */
- tty->id = tty_alloc_id();
- if ((tmp = device_create(dev, tty_major, tty->id)) < 0)
- return tmp;
-
- dev->read = tty_dev_read;
- dev->ioctl = tty_dev_ioctl;
- dev->open = tty_dev_open;
- dev->blocksize = 1;
-
- snprintf(devname, sizeof(devname), "tty%d", tty->id);
- return devfs_add_dev(devname, dev);
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 22:30:36 +0000