#include "linux/sched.h"
#include "linux/slab.h"
#include "linux/list.h"
+#include "linux/kd.h"
#include "linux/interrupt.h"
#include "linux/devfs_fs_kernel.h"
#include "asm/uaccess.h"
static irqreturn_t line_interrupt(int irq, void *data, struct pt_regs *unused)
{
- struct line *dev = data;
+ struct tty_struct *tty = data;
+ struct line *line = tty->driver_data;
- if(dev->count > 0)
- chan_interrupt(&dev->chan_list, &dev->task, dev->tty, irq,
- dev);
+ if (line)
+ chan_interrupt(&line->chan_list, &line->task, tty, irq);
return IRQ_HANDLED;
}
static void line_timer_cb(void *arg)
{
- struct line *dev = arg;
+ struct tty_struct *tty = arg;
+ struct line *line = tty->driver_data;
- line_interrupt(dev->driver->read_irq, dev, NULL);
+ line_interrupt(line->driver->read_irq, arg, NULL);
}
static int write_room(struct line *dev)
{
int n;
- if(dev->buffer == NULL) return(LINE_BUFSIZE - 1);
+ if (dev->buffer == NULL)
+ return (LINE_BUFSIZE - 1);
n = dev->head - dev->tail;
- if(n <= 0) n = LINE_BUFSIZE + n;
- return(n - 1);
+ if (n <= 0)
+ n = LINE_BUFSIZE + n;
+ return (n - 1);
}
static int buffer_data(struct line *line, const char *buf, int len)
if(line->buffer == NULL){
line->buffer = kmalloc(LINE_BUFSIZE, GFP_ATOMIC);
- if(line->buffer == NULL){
+ if (line->buffer == NULL) {
printk("buffer_data - atomic allocation failed\n");
return(0);
}
{
int n, count;
- if((line->buffer == NULL) || (line->head == line->tail)) return(1);
+ if ((line->buffer == NULL) || (line->head == line->tail))
+ return(1);
- if(line->tail < line->head){
+ if (line->tail < line->head) {
count = line->buffer + LINE_BUFSIZE - line->head;
n = write_chan(&line->chan_list, line->head, count,
line->driver->write_irq);
- if(n < 0) return(n);
- if(n == count) line->head = line->buffer;
+ if (n < 0)
+ return(n);
+ if (n == count)
+ line->head = line->buffer;
else {
line->head += n;
return(0);
return(line->head == line->tail);
}
-int line_write(struct line *lines, struct tty_struct *tty, int from_user,
- const char *buf, int len)
+int line_write(struct tty_struct *tty, const unsigned char *buf, int len)
{
- struct line *line;
- char *new;
+ struct line *line = tty->driver_data;
unsigned long flags;
- int n, err, i, ret = 0;
+ int n, err, ret = 0;
if(tty->stopped) return 0;
- if(from_user){
- new = kmalloc(len, GFP_KERNEL);
- if(new == NULL)
- return(0);
- n = copy_from_user(new, buf, len);
- buf = new;
- if(n == len){
- len = -EFAULT;
- goto out_free;
- }
-
- len -= n;
- }
-
- i = tty->index;
- line = &lines[i];
-
down(&line->sem);
if(line->head != line->tail){
local_irq_save(flags);
- ret += buffer_data(line, buf, len);
+ ret = buffer_data(line, buf, len);
err = flush_buffer(line);
local_irq_restore(flags);
if(err <= 0)
- goto out_up;
+ ret = err;
}
else {
n = write_chan(&line->chan_list, buf, len,
}
out_up:
up(&line->sem);
- out_free:
- if(from_user)
- kfree(buf);
+ return(ret);
+}
+
+void line_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ line_write(tty, &ch, sizeof(ch));
+}
+
+void line_set_termios(struct tty_struct *tty, struct termios * old)
+{
+ /* nothing */
+}
+
+int line_chars_in_buffer(struct tty_struct *tty)
+{
+ return 0;
+}
+
+static struct {
+ int cmd;
+ char *level;
+ char *name;
+} tty_ioctls[] = {
+ /* don't print these, they flood the log ... */
+ { TCGETS, NULL, "TCGETS" },
+ { TCSETS, NULL, "TCSETS" },
+ { TCSETSW, NULL, "TCSETSW" },
+ { TCFLSH, NULL, "TCFLSH" },
+ { TCSBRK, NULL, "TCSBRK" },
+
+ /* general tty stuff */
+ { TCSETSF, KERN_DEBUG, "TCSETSF" },
+ { TCGETA, KERN_DEBUG, "TCGETA" },
+ { TIOCMGET, KERN_DEBUG, "TIOCMGET" },
+ { TCSBRKP, KERN_DEBUG, "TCSBRKP" },
+ { TIOCMSET, KERN_DEBUG, "TIOCMSET" },
+
+ /* linux-specific ones */
+ { TIOCLINUX, KERN_INFO, "TIOCLINUX" },
+ { KDGKBMODE, KERN_INFO, "KDGKBMODE" },
+ { KDGKBTYPE, KERN_INFO, "KDGKBTYPE" },
+ { KDSIGACCEPT, KERN_INFO, "KDSIGACCEPT" },
+};
+
+int line_ioctl(struct tty_struct *tty, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ int ret;
+ int i;
+
+ ret = 0;
+ switch(cmd) {
+#ifdef TIOCGETP
+ case TIOCGETP:
+ case TIOCSETP:
+ case TIOCSETN:
+#endif
+#ifdef TIOCGETC
+ case TIOCGETC:
+ case TIOCSETC:
+#endif
+#ifdef TIOCGLTC
+ case TIOCGLTC:
+ case TIOCSLTC:
+#endif
+ case TCGETS:
+ case TCSETSF:
+ case TCSETSW:
+ case TCSETS:
+ case TCGETA:
+ case TCSETAF:
+ case TCSETAW:
+ case TCSETA:
+ case TCXONC:
+ case TCFLSH:
+ case TIOCOUTQ:
+ case TIOCINQ:
+ case TIOCGLCKTRMIOS:
+ case TIOCSLCKTRMIOS:
+ case TIOCPKT:
+ case TIOCGSOFTCAR:
+ case TIOCSSOFTCAR:
+ return -ENOIOCTLCMD;
+#if 0
+ case TCwhatever:
+ /* do something */
+ break;
+#endif
+ default:
+ for (i = 0; i < ARRAY_SIZE(tty_ioctls); i++)
+ if (cmd == tty_ioctls[i].cmd)
+ break;
+ if (i < ARRAY_SIZE(tty_ioctls)) {
+ if (NULL != tty_ioctls[i].level)
+ printk("%s%s: %s: ioctl %s called\n",
+ tty_ioctls[i].level, __FUNCTION__,
+ tty->name, tty_ioctls[i].name);
+ } else {
+ printk(KERN_ERR "%s: %s: unknown ioctl: 0x%x\n",
+ __FUNCTION__, tty->name, cmd);
+ }
+ ret = -ENOIOCTLCMD;
+ break;
+ }
return(ret);
}
static irqreturn_t line_write_interrupt(int irq, void *data,
struct pt_regs *unused)
{
- struct line *dev = data;
- struct tty_struct *tty = dev->tty;
+ struct tty_struct *tty = data;
+ struct line *line = tty->driver_data;
int err;
- err = flush_buffer(dev);
+ err = flush_buffer(line);
if(err == 0)
return(IRQ_NONE);
else if(err < 0){
- dev->head = dev->buffer;
- dev->tail = dev->buffer;
+ line->head = line->buffer;
+ line->tail = line->buffer;
}
if(tty == NULL)
return(IRQ_HANDLED);
}
-int line_setup_irq(int fd, int input, int output, void *data)
+int line_setup_irq(int fd, int input, int output, struct tty_struct *tty)
{
- struct line *line = data;
+ struct line *line = tty->driver_data;
struct line_driver *driver = line->driver;
int err = 0, flags = SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM;
if(input) err = um_request_irq(driver->read_irq, fd, IRQ_READ,
line_interrupt, flags,
- driver->read_irq_name, line);
+ driver->read_irq_name, tty);
if(err) return(err);
if(output) err = um_request_irq(driver->write_irq, fd, IRQ_WRITE,
line_write_interrupt, flags,
- driver->write_irq_name, line);
+ driver->write_irq_name, tty);
line->have_irq = 1;
return(err);
}
-void line_disable(struct line *line, int current_irq)
+void line_disable(struct tty_struct *tty, int current_irq)
{
- if(!line->have_irq) return;
+ struct line *line = tty->driver_data;
+
+ if(!line->have_irq)
+ return;
if(line->driver->read_irq == current_irq)
- free_irq_later(line->driver->read_irq, line);
- else
- free_irq(line->driver->read_irq, line);
+ free_irq_later(line->driver->read_irq, tty);
+ else {
+ free_irq_by_irq_and_dev(line->driver->read_irq, tty);
+ free_irq(line->driver->read_irq, tty);
+ }
if(line->driver->write_irq == current_irq)
- free_irq_later(line->driver->write_irq, line);
- else
- free_irq(line->driver->write_irq, line);
+ free_irq_later(line->driver->write_irq, tty);
+ else {
+ free_irq_by_irq_and_dev(line->driver->write_irq, tty);
+ free_irq(line->driver->write_irq, tty);
+ }
line->have_irq = 0;
}
struct chan_opts *opts)
{
struct line *line;
- int n, err = 0;
+ int err = 0;
- if(tty == NULL) n = 0;
- else n = tty->index;
- line = &lines[n];
+ line = &lines[tty->index];
+ tty->driver_data = line;
down(&line->sem);
- if(line->count == 0){
- if(!line->valid){
+ if (tty->count == 1) {
+ if (!line->valid) {
err = -ENODEV;
goto out;
}
- if(list_empty(&line->chan_list)){
+ if (list_empty(&line->chan_list)) {
err = parse_chan_pair(line->init_str, &line->chan_list,
- line->init_pri, n, opts);
+ line->init_pri, tty->index, opts);
if(err) goto out;
err = open_chan(&line->chan_list);
if(err) goto out;
}
- enable_chan(&line->chan_list, line);
- INIT_WORK(&line->task, line_timer_cb, line);
+ enable_chan(&line->chan_list, tty);
+ INIT_WORK(&line->task, line_timer_cb, tty);
}
if(!line->sigio){
- chan_enable_winch(&line->chan_list, line);
+ chan_enable_winch(&line->chan_list, tty);
line->sigio = 1;
}
-
- /* This is outside the if because the initial console is opened
- * with tty == NULL
- */
- line->tty = tty;
-
- if(tty != NULL){
- tty->driver_data = line;
- chan_window_size(&line->chan_list, &tty->winsize.ws_row,
- &tty->winsize.ws_col);
- }
-
+ chan_window_size(&line->chan_list, &tty->winsize.ws_row,
+ &tty->winsize.ws_col);
line->count++;
- out:
+
+out:
up(&line->sem);
return(err);
}
-void line_close(struct line *lines, struct tty_struct *tty)
+void line_close(struct tty_struct *tty, struct file * filp)
{
- struct line *line;
- int n;
-
- if(tty == NULL) n = 0;
- else n = tty->index;
- line = &lines[n];
+ struct line *line = tty->driver_data;
down(&line->sem);
line->count--;
-
- /* I don't like this, but I can't think of anything better. What's
- * going on is that the tty is in the process of being closed for
- * the last time. Its count hasn't been dropped yet, so it's still
- * at 1. This may happen when line->count != 0 because of the initial
- * console open (without a tty) bumping it up to 1.
- */
- if((line->tty != NULL) && (line->tty->count == 1))
- line->tty = NULL;
- if(line->count == 0)
- line_disable(line, -1);
+ if (tty->count == 1) {
+ line_disable(tty, -1);
+ tty->driver_data = NULL;
+ }
up(&line->sem);
}
n, num - 1);
return(0);
}
- else if(n >= 0){
- if(lines[n].count > 0){
+ else if (n >= 0){
+ if (lines[n].count > 0) {
printk("line_setup - device %d is open\n", n);
return(0);
}
- if(lines[n].init_pri <= INIT_ONE){
+ if (lines[n].init_pri <= INIT_ONE){
lines[n].init_pri = INIT_ONE;
- if(!strcmp(init, "none")) lines[n].valid = 0;
+ if (!strcmp(init, "none"))
+ lines[n].valid = 0;
else {
lines[n].init_str = init;
lines[n].valid = 1;
int line_write_room(struct tty_struct *tty)
{
struct line *dev = tty->driver_data;
-
- return(write_room(dev));
+ int room;
+
+ if (tty->stopped)
+ return 0;
+ room = write_room(dev);
+ if (0 == room)
+ printk(KERN_DEBUG "%s: %s: no room left in buffer\n",
+ __FUNCTION__,tty->name);
+ return room;
}
struct tty_driver *line_register_devfs(struct lines *set,
struct tty_operations *ops, struct line *lines,
int nlines)
{
- int err, i;
- char *from, *to;
+ int i;
struct tty_driver *driver = alloc_tty_driver(nlines);
if (!driver)
driver->init_termios = tty_std_termios;
tty_set_operations(driver, ops);
- if (tty_register_driver(driver))
- panic("line_register_devfs : Couldn't register driver\n");
-
- from = line_driver->symlink_from;
- to = line_driver->symlink_to;
- err = devfs_mk_symlink(from, to);
- if(err) printk("Symlink creation from /dev/%s to /dev/%s "
- "returned %d\n", from, to, err);
+ if (tty_register_driver(driver)) {
+ printk("%s: can't register %s driver\n",
+ __FUNCTION__,line_driver->name);
+ put_tty_driver(driver);
+ return NULL;
+ }
for(i = 0; i < nlines; i++){
if(!lines[i].valid)
int fd;
int tty_fd;
int pid;
- struct line *line;
+ struct tty_struct *tty;
};
irqreturn_t winch_interrupt(int irq, void *data, struct pt_regs *unused)
{
struct winch *winch = data;
struct tty_struct *tty;
+ struct line *line;
int err;
char c;
goto out;
}
}
- tty = winch->line->tty;
- if(tty != NULL){
- chan_window_size(&winch->line->chan_list,
+ tty = winch->tty;
+ if (tty != NULL) {
+ line = tty->driver_data;
+ chan_window_size(&line->chan_list,
&tty->winsize.ws_row,
&tty->winsize.ws_col);
kill_pg(tty->pgrp, SIGWINCH, 1);
DECLARE_MUTEX(winch_handler_sem);
LIST_HEAD(winch_handlers);
-void register_winch_irq(int fd, int tty_fd, int pid, void *line)
+void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty)
{
struct winch *winch;
down(&winch_handler_sem);
winch = kmalloc(sizeof(*winch), GFP_KERNEL);
- if(winch == NULL){
+ if (winch == NULL) {
printk("register_winch_irq - kmalloc failed\n");
goto out;
}
.fd = fd,
.tty_fd = tty_fd,
.pid = pid,
- .line = line });
+ .tty = tty });
list_add(&winch->list, &winch_handlers);
if(um_request_irq(WINCH_IRQ, fd, IRQ_READ, winch_interrupt,
SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM,
os_kill_process(winch->pid, 1);
}
}
-
__uml_exitcall(winch_cleanup);
char *add_xterm_umid(char *base)
git://git.onelab.eu / linux-2.6.git / blobdiff