1 files changed, 0 insertions, 613 deletions

diff --git a/drivers/staging/isdn/gigaset/interface.c b/drivers/staging/isdn/gigaset/interface.c
deleted file mode 100644
index 9ddadd07e707..000000000000
--- a/drivers/staging/isdn/gigaset/interface.c
+++ /dev/null
@@ -1,613 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * interface to user space for the gigaset driver
- *
- * Copyright (c) 2004 by Hansjoerg Lipp <hjlipp@web.de>
- *
- * =====================================================================
- * =====================================================================
- */
-
-#include "gigaset.h"
-#include <linux/gigaset_dev.h>
-#include <linux/tty_flip.h>
-#include <linux/module.h>
-
-/*** our ioctls ***/
-
-static int if_lock(struct cardstate *cs, int *arg)
-{
-	int cmd = *arg;
-
-	gig_dbg(DEBUG_IF, "%u: if_lock (%d)", cs->minor_index, cmd);
-
-	if (cmd > 1)
-		return -EINVAL;
-
-	if (cmd < 0) {
-		*arg = cs->mstate == MS_LOCKED;
-		return 0;
-	}
-
-	if (!cmd && cs->mstate == MS_LOCKED && cs->connected) {
-		cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR | TIOCM_RTS);
-		cs->ops->baud_rate(cs, B115200);
-		cs->ops->set_line_ctrl(cs, CS8);
-		cs->control_state = TIOCM_DTR | TIOCM_RTS;
-	}
-
-	cs->waiting = 1;
-	if (!gigaset_add_event(cs, &cs->at_state, EV_IF_LOCK,
-			       NULL, cmd, NULL)) {
-		cs->waiting = 0;
-		return -ENOMEM;
-	}
-	gigaset_schedule_event(cs);
-
-	wait_event(cs->waitqueue, !cs->waiting);
-
-	if (cs->cmd_result >= 0) {
-		*arg = cs->cmd_result;
-		return 0;
-	}
-
-	return cs->cmd_result;
-}
-
-static int if_version(struct cardstate *cs, unsigned arg[4])
-{
-	static const unsigned version[4] = GIG_VERSION;
-	static const unsigned compat[4] = GIG_COMPAT;
-	unsigned cmd = arg[0];
-
-	gig_dbg(DEBUG_IF, "%u: if_version (%d)", cs->minor_index, cmd);
-
-	switch (cmd) {
-	case GIGVER_DRIVER:
-		memcpy(arg, version, sizeof version);
-		return 0;
-	case GIGVER_COMPAT:
-		memcpy(arg, compat, sizeof compat);
-		return 0;
-	case GIGVER_FWBASE:
-		cs->waiting = 1;
-		if (!gigaset_add_event(cs, &cs->at_state, EV_IF_VER,
-				       NULL, 0, arg)) {
-			cs->waiting = 0;
-			return -ENOMEM;
-		}
-		gigaset_schedule_event(cs);
-
-		wait_event(cs->waitqueue, !cs->waiting);
-
-		if (cs->cmd_result >= 0)
-			return 0;
-
-		return cs->cmd_result;
-	default:
-		return -EINVAL;
-	}
-}
-
-static int if_config(struct cardstate *cs, int *arg)
-{
-	gig_dbg(DEBUG_IF, "%u: if_config (%d)", cs->minor_index, *arg);
-
-	if (*arg != 1)
-		return -EINVAL;
-
-	if (cs->mstate != MS_LOCKED)
-		return -EBUSY;
-
-	if (!cs->connected) {
-		pr_err("%s: not connected\n", __func__);
-		return -ENODEV;
-	}
-
-	*arg = 0;
-	return gigaset_enterconfigmode(cs);
-}
-
-/*** the terminal driver ***/
-
-static int if_open(struct tty_struct *tty, struct file *filp)
-{
-	struct cardstate *cs;
-
-	gig_dbg(DEBUG_IF, "%d+%d: %s()",
-		tty->driver->minor_start, tty->index, __func__);
-
-	cs = gigaset_get_cs_by_tty(tty);
-	if (!cs || !try_module_get(cs->driver->owner))
-		return -ENODEV;
-
-	if (mutex_lock_interruptible(&cs->mutex)) {
-		module_put(cs->driver->owner);
-		return -ERESTARTSYS;
-	}
-	tty->driver_data = cs;
-
-	++cs->port.count;
-
-	if (cs->port.count == 1) {
-		tty_port_tty_set(&cs->port, tty);
-		cs->port.low_latency = 1;
-	}
-
-	mutex_unlock(&cs->mutex);
-	return 0;
-}
-
-static void if_close(struct tty_struct *tty, struct file *filp)
-{
-	struct cardstate *cs = tty->driver_data;
-
-	if (!cs) { /* happens if we didn't find cs in open */
-		gig_dbg(DEBUG_IF, "%s: no cardstate", __func__);
-		return;
-	}
-
-	gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
-
-	mutex_lock(&cs->mutex);
-
-	if (!cs->connected)
-		gig_dbg(DEBUG_IF, "not connected");	/* nothing to do */
-	else if (!cs->port.count)
-		dev_warn(cs->dev, "%s: device not opened\n", __func__);
-	else if (!--cs->port.count)
-		tty_port_tty_set(&cs->port, NULL);
-
-	mutex_unlock(&cs->mutex);
-
-	module_put(cs->driver->owner);
-}
-
-static int if_ioctl(struct tty_struct *tty,
-		    unsigned int cmd, unsigned long arg)
-{
-	struct cardstate *cs = tty->driver_data;
-	int retval = -ENODEV;
-	int int_arg;
-	unsigned char buf[6];
-	unsigned version[4];
-
-	gig_dbg(DEBUG_IF, "%u: %s(0x%x)", cs->minor_index, __func__, cmd);
-
-	if (mutex_lock_interruptible(&cs->mutex))
-		return -ERESTARTSYS;
-
-	if (!cs->connected) {
-		gig_dbg(DEBUG_IF, "not connected");
-		retval = -ENODEV;
-	} else {
-		retval = 0;
-		switch (cmd) {
-		case GIGASET_REDIR:
-			retval = get_user(int_arg, (int __user *) arg);
-			if (retval >= 0)
-				retval = if_lock(cs, &int_arg);
-			if (retval >= 0)
-				retval = put_user(int_arg, (int __user *) arg);
-			break;
-		case GIGASET_CONFIG:
-			retval = get_user(int_arg, (int __user *) arg);
-			if (retval >= 0)
-				retval = if_config(cs, &int_arg);
-			if (retval >= 0)
-				retval = put_user(int_arg, (int __user *) arg);
-			break;
-		case GIGASET_BRKCHARS:
-			retval = copy_from_user(&buf,
-						(const unsigned char __user *) arg, 6)
-				? -EFAULT : 0;
-			if (retval >= 0) {
-				gigaset_dbg_buffer(DEBUG_IF, "GIGASET_BRKCHARS",
-						   6, buf);
-				retval = cs->ops->brkchars(cs, buf);
-			}
-			break;
-		case GIGASET_VERSION:
-			retval = copy_from_user(version,
-						(unsigned __user *) arg, sizeof version)
-				? -EFAULT : 0;
-			if (retval >= 0)
-				retval = if_version(cs, version);
-			if (retval >= 0)
-				retval = copy_to_user((unsigned __user *) arg,
-						      version, sizeof version)
-					? -EFAULT : 0;
-			break;
-		default:
-			gig_dbg(DEBUG_IF, "%s: arg not supported - 0x%04x",
-				__func__, cmd);
-			retval = -ENOIOCTLCMD;
-		}
-	}
-
-	mutex_unlock(&cs->mutex);
-
-	return retval;
-}
-
-#ifdef CONFIG_COMPAT
-static long if_compat_ioctl(struct tty_struct *tty,
-		    unsigned int cmd, unsigned long arg)
-{
-	return if_ioctl(tty, cmd, (unsigned long)compat_ptr(arg));
-}
-#endif
-
-static int if_tiocmget(struct tty_struct *tty)
-{
-	struct cardstate *cs = tty->driver_data;
-	int retval;
-
-	gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
-
-	if (mutex_lock_interruptible(&cs->mutex))
-		return -ERESTARTSYS;
-
-	retval = cs->control_state & (TIOCM_RTS | TIOCM_DTR);
-
-	mutex_unlock(&cs->mutex);
-
-	return retval;
-}
-
-static int if_tiocmset(struct tty_struct *tty,
-		       unsigned int set, unsigned int clear)
-{
-	struct cardstate *cs = tty->driver_data;
-	int retval;
-	unsigned mc;
-
-	gig_dbg(DEBUG_IF, "%u: %s(0x%x, 0x%x)",
-		cs->minor_index, __func__, set, clear);
-
-	if (mutex_lock_interruptible(&cs->mutex))
-		return -ERESTARTSYS;
-
-	if (!cs->connected) {
-		gig_dbg(DEBUG_IF, "not connected");
-		retval = -ENODEV;
-	} else {
-		mc = (cs->control_state | set) & ~clear & (TIOCM_RTS | TIOCM_DTR);
-		retval = cs->ops->set_modem_ctrl(cs, cs->control_state, mc);
-		cs->control_state = mc;
-	}
-
-	mutex_unlock(&cs->mutex);
-
-	return retval;
-}
-
-static int if_write(struct tty_struct *tty, const unsigned char *buf, int count)
-{
-	struct cardstate *cs = tty->driver_data;
-	struct cmdbuf_t *cb;
-	int retval;
-
-	gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
-
-	if (mutex_lock_interruptible(&cs->mutex))
-		return -ERESTARTSYS;
-
-	if (!cs->connected) {
-		gig_dbg(DEBUG_IF, "not connected");
-		retval = -ENODEV;
-		goto done;
-	}
-	if (cs->mstate != MS_LOCKED) {
-		dev_warn(cs->dev, "can't write to unlocked device\n");
-		retval = -EBUSY;
-		goto done;
-	}
-	if (count <= 0) {
-		/* nothing to do */
-		retval = 0;
-		goto done;
-	}
-
-	cb = kmalloc(sizeof(struct cmdbuf_t) + count, GFP_KERNEL);
-	if (!cb) {
-		dev_err(cs->dev, "%s: out of memory\n", __func__);
-		retval = -ENOMEM;
-		goto done;
-	}
-
-	memcpy(cb->buf, buf, count);
-	cb->len = count;
-	cb->offset = 0;
-	cb->next = NULL;
-	cb->wake_tasklet = &cs->if_wake_tasklet;
-	retval = cs->ops->write_cmd(cs, cb);
-done:
-	mutex_unlock(&cs->mutex);
-	return retval;
-}
-
-static int if_write_room(struct tty_struct *tty)
-{
-	struct cardstate *cs = tty->driver_data;
-	int retval;
-
-	gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
-
-	if (mutex_lock_interruptible(&cs->mutex))
-		return -ERESTARTSYS;
-
-	if (!cs->connected) {
-		gig_dbg(DEBUG_IF, "not connected");
-		retval = -ENODEV;
-	} else if (cs->mstate != MS_LOCKED) {
-		dev_warn(cs->dev, "can't write to unlocked device\n");
-		retval = -EBUSY;
-	} else
-		retval = cs->ops->write_room(cs);
-
-	mutex_unlock(&cs->mutex);
-
-	return retval;
-}
-
-static int if_chars_in_buffer(struct tty_struct *tty)
-{
-	struct cardstate *cs = tty->driver_data;
-	int retval = 0;
-
-	gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
-
-	mutex_lock(&cs->mutex);
-
-	if (!cs->connected)
-		gig_dbg(DEBUG_IF, "not connected");
-	else if (cs->mstate != MS_LOCKED)
-		dev_warn(cs->dev, "can't write to unlocked device\n");
-	else
-		retval = cs->ops->chars_in_buffer(cs);
-
-	mutex_unlock(&cs->mutex);
-
-	return retval;
-}
-
-static void if_throttle(struct tty_struct *tty)
-{
-	struct cardstate *cs = tty->driver_data;
-
-	gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
-
-	mutex_lock(&cs->mutex);
-
-	if (!cs->connected)
-		gig_dbg(DEBUG_IF, "not connected");	/* nothing to do */
-	else
-		gig_dbg(DEBUG_IF, "%s: not implemented\n", __func__);
-
-	mutex_unlock(&cs->mutex);
-}
-
-static void if_unthrottle(struct tty_struct *tty)
-{
-	struct cardstate *cs = tty->driver_data;
-
-	gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
-
-	mutex_lock(&cs->mutex);
-
-	if (!cs->connected)
-		gig_dbg(DEBUG_IF, "not connected");	/* nothing to do */
-	else
-		gig_dbg(DEBUG_IF, "%s: not implemented\n", __func__);
-
-	mutex_unlock(&cs->mutex);
-}
-
-static void if_set_termios(struct tty_struct *tty, struct ktermios *old)
-{
-	struct cardstate *cs = tty->driver_data;
-	unsigned int iflag;
-	unsigned int cflag;
-	unsigned int old_cflag;
-	unsigned int control_state, new_state;
-
-	gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
-
-	mutex_lock(&cs->mutex);
-
-	if (!cs->connected) {
-		gig_dbg(DEBUG_IF, "not connected");
-		goto out;
-	}
-
-	iflag = tty->termios.c_iflag;
-	cflag = tty->termios.c_cflag;
-	old_cflag = old ? old->c_cflag : cflag;
-	gig_dbg(DEBUG_IF, "%u: iflag %x cflag %x old %x",
-		cs->minor_index, iflag, cflag, old_cflag);
-
-	/* get a local copy of the current port settings */
-	control_state = cs->control_state;
-
-	/*
-	 * Update baud rate.
-	 * Do not attempt to cache old rates and skip settings,
-	 * disconnects screw such tricks up completely.
-	 * Premature optimization is the root of all evil.
-	 */
-
-	/* reassert DTR and (maybe) RTS on transition from B0 */
-	if ((old_cflag & CBAUD) == B0) {
-		new_state = control_state | TIOCM_DTR;
-		/* don't set RTS if using hardware flow control */
-		if (!(old_cflag & CRTSCTS))
-			new_state |= TIOCM_RTS;
-		gig_dbg(DEBUG_IF, "%u: from B0 - set DTR%s",
-			cs->minor_index,
-			(new_state & TIOCM_RTS) ? " only" : "/RTS");
-		cs->ops->set_modem_ctrl(cs, control_state, new_state);
-		control_state = new_state;
-	}
-
-	cs->ops->baud_rate(cs, cflag & CBAUD);
-
-	if ((cflag & CBAUD) == B0) {
-		/* Drop RTS and DTR */
-		gig_dbg(DEBUG_IF, "%u: to B0 - drop DTR/RTS", cs->minor_index);
-		new_state = control_state & ~(TIOCM_DTR | TIOCM_RTS);
-		cs->ops->set_modem_ctrl(cs, control_state, new_state);
-		control_state = new_state;
-	}
-
-	/*
-	 * Update line control register (LCR)
-	 */
-
-	cs->ops->set_line_ctrl(cs, cflag);
-
-	/* save off the modified port settings */
-	cs->control_state = control_state;
-
-out:
-	mutex_unlock(&cs->mutex);
-}
-
-static const struct tty_operations if_ops = {
-	.open =			if_open,
-	.close =		if_close,
-	.ioctl =		if_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl =		if_compat_ioctl,
-#endif
-	.write =		if_write,
-	.write_room =		if_write_room,
-	.chars_in_buffer =	if_chars_in_buffer,
-	.set_termios =		if_set_termios,
-	.throttle =		if_throttle,
-	.unthrottle =		if_unthrottle,
-	.tiocmget =		if_tiocmget,
-	.tiocmset =		if_tiocmset,
-};
-
-
-/* wakeup tasklet for the write operation */
-static void if_wake(unsigned long data)
-{
-	struct cardstate *cs = (struct cardstate *)data;
-
-	tty_port_tty_wakeup(&cs->port);
-}
-
-/*** interface to common ***/
-
-void gigaset_if_init(struct cardstate *cs)
-{
-	struct gigaset_driver *drv;
-
-	drv = cs->driver;
-	if (!drv->have_tty)
-		return;
-
-	tasklet_init(&cs->if_wake_tasklet, if_wake, (unsigned long) cs);
-
-	mutex_lock(&cs->mutex);
-	cs->tty_dev = tty_port_register_device(&cs->port, drv->tty,
-			cs->minor_index, NULL);
-
-	if (!IS_ERR(cs->tty_dev))
-		dev_set_drvdata(cs->tty_dev, cs);
-	else {
-		pr_warn("could not register device to the tty subsystem\n");
-		cs->tty_dev = NULL;
-	}
-	mutex_unlock(&cs->mutex);
-}
-
-void gigaset_if_free(struct cardstate *cs)
-{
-	struct gigaset_driver *drv;
-
-	drv = cs->driver;
-	if (!drv->have_tty)
-		return;
-
-	tasklet_disable(&cs->if_wake_tasklet);
-	tasklet_kill(&cs->if_wake_tasklet);
-	cs->tty_dev = NULL;
-	tty_unregister_device(drv->tty, cs->minor_index);
-}
-
-/**
- * gigaset_if_receive() - pass a received block of data to the tty device
- * @cs:		device descriptor structure.
- * @buffer:	received data.
- * @len:	number of bytes received.
- *
- * Called by asyncdata/isocdata if a block of data received from the
- * device must be sent to userspace through the ttyG* device.
- */
-void gigaset_if_receive(struct cardstate *cs,
-			unsigned char *buffer, size_t len)
-{
-	tty_insert_flip_string(&cs->port, buffer, len);
-	tty_flip_buffer_push(&cs->port);
-}
-EXPORT_SYMBOL_GPL(gigaset_if_receive);
-
-/* gigaset_if_initdriver
- * Initialize tty interface.
- * parameters:
- *	drv		Driver
- *	procname	Name of the driver (e.g. for /proc/tty/drivers)
- *	devname		Name of the device files (prefix without minor number)
- */
-void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
-			   const char *devname)
-{
-	int ret;
-	struct tty_driver *tty;
-
-	drv->have_tty = 0;
-
-	drv->tty = tty = alloc_tty_driver(drv->minors);
-	if (tty == NULL)
-		goto enomem;
-
-	tty->type =		TTY_DRIVER_TYPE_SERIAL;
-	tty->subtype =		SERIAL_TYPE_NORMAL;
-	tty->flags =		TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-
-	tty->driver_name =	procname;
-	tty->name =		devname;
-	tty->minor_start =	drv->minor;
-
-	tty->init_termios          = tty_std_termios;
-	tty->init_termios.c_cflag  = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-	tty_set_operations(tty, &if_ops);
-
-	ret = tty_register_driver(tty);
-	if (ret < 0) {
-		pr_err("error %d registering tty driver\n", ret);
-		goto error;
-	}
-	gig_dbg(DEBUG_IF, "tty driver initialized");
-	drv->have_tty = 1;
-	return;
-
-enomem:
-	pr_err("out of memory\n");
-error:
-	if (drv->tty)
-		put_tty_driver(drv->tty);
-}
-
-void gigaset_if_freedriver(struct gigaset_driver *drv)
-{
-	if (!drv->have_tty)
-		return;
-
-	drv->have_tty = 0;
-	tty_unregister_driver(drv->tty);
-	put_tty_driver(drv->tty);
-}